misc: Move panel driver out of staging
authorKsenija Stanojevic <ksenija.stanojevic@gmail.com>
Wed, 3 Feb 2016 11:31:49 +0000 (12:31 +0100)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 3 Feb 2016 22:14:22 +0000 (14:14 -0800)
Move panel driver from drivers/staging/panel to drivers/misc.

Signed-off-by: Ksenija Stanojevic <ksenija.stanojevic@gmail.com>
Acked-by: Willy Tarreau <w@1wt.eu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
12 files changed:
Documentation/misc-devices/lcd-panel-cgram.txt [new file with mode: 0644]
MAINTAINERS
drivers/misc/Kconfig
drivers/misc/Makefile
drivers/misc/panel.c [new file with mode: 0644]
drivers/staging/Kconfig
drivers/staging/Makefile
drivers/staging/panel/Kconfig [deleted file]
drivers/staging/panel/Makefile [deleted file]
drivers/staging/panel/TODO [deleted file]
drivers/staging/panel/lcd-panel-cgram.txt [deleted file]
drivers/staging/panel/panel.c [deleted file]

diff --git a/Documentation/misc-devices/lcd-panel-cgram.txt b/Documentation/misc-devices/lcd-panel-cgram.txt
new file mode 100644 (file)
index 0000000..7f82c90
--- /dev/null
@@ -0,0 +1,24 @@
+Some LCDs allow you to define up to 8 characters, mapped to ASCII
+characters 0 to 7. The escape code to define a new character is
+'\e[LG' followed by one digit from 0 to 7, representing the character
+number, and up to 8 couples of hex digits terminated by a semi-colon
+(';'). Each couple of digits represents a line, with 1-bits for each
+illuminated pixel with LSB on the right. Lines are numbered from the
+top of the character to the bottom. On a 5x7 matrix, only the 5 lower
+bits of the 7 first bytes are used for each character. If the string
+is incomplete, only complete lines will be redefined. Here are some
+examples :
+
+  printf "\e[LG0010101050D1F0C04;"  => 0 = [enter]
+  printf "\e[LG1040E1F0000000000;"  => 1 = [up]
+  printf "\e[LG2000000001F0E0400;"  => 2 = [down]
+  printf "\e[LG3040E1F001F0E0400;"  => 3 = [up-down]
+  printf "\e[LG40002060E1E0E0602;"  => 4 = [left]
+  printf "\e[LG500080C0E0F0E0C08;"  => 5 = [right]
+  printf "\e[LG60016051516141400;"  => 6 = "IP"
+
+  printf "\e[LG00103071F1F070301;"  => big speaker
+  printf "\e[LG00002061E1E060200;"  => small speaker
+
+Willy
+
index 369f6aefc18985e9279a412b922725dc0eca4edf..7c39a48b41188a8b3e64f809edfcadd1e45c7a98 100644 (file)
@@ -8168,6 +8168,13 @@ S:       Maintained
 F:     Documentation/mn10300/
 F:     arch/mn10300/
 
+PARALLEL LCD/KEYPAD PANEL DRIVER
+M:      Willy Tarreau <willy@haproxy.com>
+M:      Ksenija Stanojevic <ksenija.stanojevic@gmail.com>
+S:      Odd Fixes
+F:      Documentation/misc-devices/lcd-panel-cgram.txt
+F:      drivers/misc/panel.c
+
 PARALLEL PORT SUBSYSTEM
 M:     Sudip Mukherjee <sudipm.mukherjee@gmail.com>
 M:     Sudip Mukherjee <sudip@vectorindia.org>
@@ -10391,11 +10398,6 @@ L:     linux-tegra@vger.kernel.org
 S:     Maintained
 F:     drivers/staging/nvec/
 
-STAGING - PARALLEL LCD/KEYPAD PANEL DRIVER
-M:     Willy Tarreau <willy@haproxy.com>
-S:     Odd Fixes
-F:     drivers/staging/panel/
-
 STAGING - REALTEK RTL8712U DRIVERS
 M:     Larry Finger <Larry.Finger@lwfinger.net>
 M:     Florian Schilhabel <florian.c.schilhabel@googlemail.com>.
index 054fc10cb3b6ab5a6b5f9d51b2ded3bb656cbf4e..f0ba78289504c367ea07d8d3f57e12310016652d 100644 (file)
@@ -525,6 +525,284 @@ config VEXPRESS_SYSCFG
          ARM Ltd. Versatile Express uses specialised platform configuration
          bus. System Configuration interface is one of the possible means
          of generating transactions on this bus.
+config PANEL
+       tristate "Parallel port LCD/Keypad Panel support"
+       depends on PARPORT
+       ---help---
+         Say Y here if you have an HD44780 or KS-0074 LCD connected to your
+         parallel port. This driver also features 4 and 6-key keypads. The LCD
+         is accessible through the /dev/lcd char device (10, 156), and the
+         keypad through /dev/keypad (10, 185). Both require misc device to be
+         enabled. This code can either be compiled as a module, or linked into
+         the kernel and started at boot. If you don't understand what all this
+         is about, say N.
+
+config PANEL_PARPORT
+       int "Default parallel port number (0=LPT1)"
+       depends on PANEL
+       range 0 255
+       default "0"
+       ---help---
+         This is the index of the parallel port the panel is connected to. One
+         driver instance only supports one parallel port, so if your keypad
+         and LCD are connected to two separate ports, you have to start two
+         modules with different arguments. Numbering starts with '0' for LPT1,
+         and so on.
+
+config PANEL_PROFILE
+       int "Default panel profile (0-5, 0=custom)"
+       depends on PANEL
+       range 0 5
+       default "5"
+       ---help---
+         To ease configuration, the driver supports different configuration
+         profiles for past and recent wirings. These profiles can also be
+         used to define an approximative configuration, completed by a few
+         other options. Here are the profiles :
+
+           0 = custom (see further)
+           1 = 2x16 parallel LCD, old keypad
+           2 = 2x16 serial LCD (KS-0074), new keypad
+           3 = 2x16 parallel LCD (Hantronix), no keypad
+           4 = 2x16 parallel LCD (Nexcom NSA1045) with Nexcom's keypad
+           5 = 2x40 parallel LCD (old one), with old keypad
+
+         Custom configurations allow you to define how your display is
+         wired to the parallel port, and how it works. This is only intended
+         for experts.
+
+config PANEL_KEYPAD
+       depends on PANEL && PANEL_PROFILE="0"
+       int "Keypad type (0=none, 1=old 6 keys, 2=new 6 keys, 3=Nexcom 4 keys)"
+       range 0 3
+       default 0
+       ---help---
+         This enables and configures a keypad connected to the parallel port.
+         The keys will be read from character device 10,185. Valid values are :
+
+           0 : do not enable this driver
+           1 : old 6 keys keypad
+           2 : new 6 keys keypad, as used on the server at www.ant-computing.com
+           3 : Nexcom NSA1045's 4 keys keypad
+
+         New profiles can be described in the driver source. The driver also
+         supports simultaneous keys pressed when the keypad supports them.
+
+config PANEL_LCD
+       depends on PANEL && PANEL_PROFILE="0"
+       int "LCD type (0=none, 1=custom, 2=old //, 3=ks0074, 4=hantronix, 5=Nexcom)"
+       range 0 5
+       default 0
+       ---help---
+          This enables and configures an LCD connected to the parallel port.
+          The driver includes an interpreter for escape codes starting with
+          '\e[L' which are specific to the LCD, and a few ANSI codes. The
+          driver will be registered as character device 10,156, usually
+          under the name '/dev/lcd'. There are a total of 6 supported types :
+
+            0 : do not enable the driver
+            1 : custom configuration and wiring (see further)
+            2 : 2x16 & 2x40 parallel LCD (old wiring)
+            3 : 2x16 serial LCD (KS-0074 based)
+            4 : 2x16 parallel LCD (Hantronix wiring)
+            5 : 2x16 parallel LCD (Nexcom wiring)
+
+          When type '1' is specified, other options will appear to configure
+          more precise aspects (wiring, dimensions, protocol, ...). Please note
+          that those values changed from the 2.4 driver for better consistency.
+
+config PANEL_LCD_HEIGHT
+       depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1"
+       int "Number of lines on the LCD (1-2)"
+       range 1 2
+       default 2
+       ---help---
+         This is the number of visible character lines on the LCD in custom profile.
+         It can either be 1 or 2.
+
+config PANEL_LCD_WIDTH
+       depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1"
+       int "Number of characters per line on the LCD (1-40)"
+       range 1 40
+       default 40
+       ---help---
+         This is the number of characters per line on the LCD in custom profile.
+         Common values are 16,20,24,40.
+
+config PANEL_LCD_BWIDTH
+       depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1"
+       int "Internal LCD line width (1-40, 40 by default)"
+       range 1 40
+       default 40
+       ---help---
+         Most LCDs use a standard controller which supports hardware lines of 40
+         characters, although sometimes only 16, 20 or 24 of them are really wired
+         to the terminal. This results in some non-visible but addressable characters,
+         and is the case for most parallel LCDs. Other LCDs, and some serial ones,
+         however, use the same line width internally as what is visible. The KS0074
+         for example, uses 16 characters per line for 16 visible characters per line.
+
+         This option lets you configure the value used by your LCD in 'custom' profile.
+         If you don't know, put '40' here.
+
+config PANEL_LCD_HWIDTH
+       depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1"
+       int "Hardware LCD line width (1-64, 64 by default)"
+       range 1 64
+       default 64
+       ---help---
+         Most LCDs use a single address bit to differentiate line 0 and line 1. Since
+         some of them need to be able to address 40 chars with the lower bits, they
+         often use the immediately superior power of 2, which is 64, to address the
+         next line.
+
+         If you don't know what your LCD uses, in doubt let 16 here for a 2x16, and
+         64 here for a 2x40.
+
+config PANEL_LCD_CHARSET
+       depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1"
+       int "LCD character set (0=normal, 1=KS0074)"
+       range 0 1
+       default 0
+       ---help---
+         Some controllers such as the KS0074 use a somewhat strange character set
+         where many symbols are at unusual places. The driver knows how to map
+         'standard' ASCII characters to the character sets used by these controllers.
+         Valid values are :
+
+            0 : normal (untranslated) character set
+            1 : KS0074 character set
+
+         If you don't know, use the normal one (0).
+
+config PANEL_LCD_PROTO
+       depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1"
+       int "LCD communication mode (0=parallel 8 bits, 1=serial)"
+       range 0 1
+       default 0
+       ---help---
+         This driver now supports any serial or parallel LCD wired to a parallel
+         port. But before assigning signals, the driver needs to know if it will
+         be driving a serial LCD or a parallel one. Serial LCDs only use 2 wires
+         (SDA/SCL), while parallel ones use 2 or 3 wires for the control signals
+         (E, RS, sometimes RW), and 4 or 8 for the data. Use 0 here for a 8 bits
+         parallel LCD, and 1 for a serial LCD.
+
+config PANEL_LCD_PIN_E
+       depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO="0"
+        int "Parallel port pin number & polarity connected to the LCD E signal (-17...17) "
+       range -17 17
+       default 14
+       ---help---
+         This describes the number of the parallel port pin to which the LCD 'E'
+         signal has been connected. It can be :
+
+                 0 : no connection (eg: connected to ground)
+             1..17 : directly connected to any of these pins on the DB25 plug
+           -1..-17 : connected to the same pin through an inverter (eg: transistor).
+
+         Default for the 'E' pin in custom profile is '14' (AUTOFEED).
+
+config PANEL_LCD_PIN_RS
+       depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO="0"
+        int "Parallel port pin number & polarity connected to the LCD RS signal (-17...17) "
+       range -17 17
+       default 17
+       ---help---
+         This describes the number of the parallel port pin to which the LCD 'RS'
+         signal has been connected. It can be :
+
+                 0 : no connection (eg: connected to ground)
+             1..17 : directly connected to any of these pins on the DB25 plug
+           -1..-17 : connected to the same pin through an inverter (eg: transistor).
+
+         Default for the 'RS' pin in custom profile is '17' (SELECT IN).
+
+config PANEL_LCD_PIN_RW
+       depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO="0"
+        int "Parallel port pin number & polarity connected to the LCD RW signal (-17...17) "
+       range -17 17
+       default 16
+       ---help---
+         This describes the number of the parallel port pin to which the LCD 'RW'
+         signal has been connected. It can be :
+
+                 0 : no connection (eg: connected to ground)
+             1..17 : directly connected to any of these pins on the DB25 plug
+           -1..-17 : connected to the same pin through an inverter (eg: transistor).
+
+         Default for the 'RW' pin in custom profile is '16' (INIT).
+
+config PANEL_LCD_PIN_SCL
+       depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO!="0"
+        int "Parallel port pin number & polarity connected to the LCD SCL signal (-17...17) "
+       range -17 17
+       default 1
+       ---help---
+         This describes the number of the parallel port pin to which the serial
+         LCD 'SCL' signal has been connected. It can be :
+
+                 0 : no connection (eg: connected to ground)
+             1..17 : directly connected to any of these pins on the DB25 plug
+           -1..-17 : connected to the same pin through an inverter (eg: transistor).
+
+         Default for the 'SCL' pin in custom profile is '1' (STROBE).
+
+config PANEL_LCD_PIN_SDA
+       depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO!="0"
+        int "Parallel port pin number & polarity connected to the LCD SDA signal (-17...17) "
+       range -17 17
+       default 2
+       ---help---
+         This describes the number of the parallel port pin to which the serial
+         LCD 'SDA' signal has been connected. It can be :
+
+                 0 : no connection (eg: connected to ground)
+             1..17 : directly connected to any of these pins on the DB25 plug
+           -1..-17 : connected to the same pin through an inverter (eg: transistor).
+
+         Default for the 'SDA' pin in custom profile is '2' (D0).
+
+config PANEL_LCD_PIN_BL
+       depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1"
+        int "Parallel port pin number & polarity connected to the LCD backlight signal (-17...17) "
+       range -17 17
+       default 0
+       ---help---
+         This describes the number of the parallel port pin to which the LCD 'BL' signal
+          has been connected. It can be :
+
+                 0 : no connection (eg: connected to ground)
+             1..17 : directly connected to any of these pins on the DB25 plug
+           -1..-17 : connected to the same pin through an inverter (eg: transistor).
+
+         Default for the 'BL' pin in custom profile is '0' (uncontrolled).
+
+config PANEL_CHANGE_MESSAGE
+       depends on PANEL
+       bool "Change LCD initialization message ?"
+       default "n"
+       ---help---
+         This allows you to replace the boot message indicating the kernel version
+         and the driver version with a custom message. This is useful on appliances
+         where a simple 'Starting system' message can be enough to stop a customer
+         from worrying.
+
+         If you say 'Y' here, you'll be able to choose a message yourself. Otherwise,
+         say 'N' and keep the default message with the version.
+
+config PANEL_BOOT_MESSAGE
+       depends on PANEL && PANEL_CHANGE_MESSAGE="y"
+       string "New initialization message"
+       default ""
+       ---help---
+         This allows you to replace the boot message indicating the kernel version
+         and the driver version with a custom message. This is useful on appliances
+         where a simple 'Starting system' message can be enough to stop a customer
+         from worrying.
+
+         An empty message will only clear the display at driver init time. Any other
+         printf()-formatted message is valid with newline and escape codes.
 
 source "drivers/misc/c2port/Kconfig"
 source "drivers/misc/eeprom/Kconfig"
index 537d7f3b78da9a35afcf4fe41053bbcbef1dd1f2..b2fb6dbffcef0c4999439287b3e1c1a10bdcf264 100644 (file)
@@ -56,3 +56,4 @@ obj-$(CONFIG_GENWQE)          += genwqe/
 obj-$(CONFIG_ECHO)             += echo/
 obj-$(CONFIG_VEXPRESS_SYSCFG)  += vexpress-syscfg.o
 obj-$(CONFIG_CXL_BASE)         += cxl/
+obj-$(CONFIG_PANEL)             += panel.o
diff --git a/drivers/misc/panel.c b/drivers/misc/panel.c
new file mode 100644 (file)
index 0000000..4262db0
--- /dev/null
@@ -0,0 +1,2445 @@
+/*
+ * Front panel driver for Linux
+ * Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ *
+ * This code drives an LCD module (/dev/lcd), and a keypad (/dev/keypad)
+ * connected to a parallel printer port.
+ *
+ * The LCD module may either be an HD44780-like 8-bit parallel LCD, or a 1-bit
+ * serial module compatible with Samsung's KS0074. The pins may be connected in
+ * any combination, everything is programmable.
+ *
+ * The keypad consists in a matrix of push buttons connecting input pins to
+ * data output pins or to the ground. The combinations have to be hard-coded
+ * in the driver, though several profiles exist and adding new ones is easy.
+ *
+ * Several profiles are provided for commonly found LCD+keypad modules on the
+ * market, such as those found in Nexcom's appliances.
+ *
+ * FIXME:
+ *      - the initialization/deinitialization process is very dirty and should
+ *        be rewritten. It may even be buggy.
+ *
+ * TODO:
+ *     - document 24 keys keyboard (3 rows of 8 cols, 32 diodes + 2 inputs)
+ *      - make the LCD a part of a virtual screen of Vx*Vy
+ *     - make the inputs list smp-safe
+ *      - change the keyboard to a double mapping : signals -> key_id -> values
+ *        so that applications can change values without knowing signals
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/sched.h>
+#include <linux/spinlock.h>
+#include <linux/interrupt.h>
+#include <linux/miscdevice.h>
+#include <linux/slab.h>
+#include <linux/ioport.h>
+#include <linux/fcntl.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/ctype.h>
+#include <linux/parport.h>
+#include <linux/list.h>
+#include <linux/notifier.h>
+#include <linux/reboot.h>
+#include <generated/utsrelease.h>
+
+#include <linux/io.h>
+#include <linux/uaccess.h>
+
+#define LCD_MINOR              156
+#define KEYPAD_MINOR           185
+
+#define PANEL_VERSION          "0.9.5"
+
+#define LCD_MAXBYTES           256     /* max burst write */
+
+#define KEYPAD_BUFFER          64
+
+/* poll the keyboard this every second */
+#define INPUT_POLL_TIME                (HZ / 50)
+/* a key starts to repeat after this times INPUT_POLL_TIME */
+#define KEYPAD_REP_START       (10)
+/* a key repeats this times INPUT_POLL_TIME */
+#define KEYPAD_REP_DELAY       (2)
+
+/* keep the light on this times INPUT_POLL_TIME for each flash */
+#define FLASH_LIGHT_TEMPO      (200)
+
+/* converts an r_str() input to an active high, bits string : 000BAOSE */
+#define PNL_PINPUT(a)          ((((unsigned char)(a)) ^ 0x7F) >> 3)
+
+#define PNL_PBUSY              0x80    /* inverted input, active low */
+#define PNL_PACK               0x40    /* direct input, active low */
+#define PNL_POUTPA             0x20    /* direct input, active high */
+#define PNL_PSELECD            0x10    /* direct input, active high */
+#define PNL_PERRORP            0x08    /* direct input, active low */
+
+#define PNL_PBIDIR             0x20    /* bi-directional ports */
+/* high to read data in or-ed with data out */
+#define PNL_PINTEN             0x10
+#define PNL_PSELECP            0x08    /* inverted output, active low */
+#define PNL_PINITP             0x04    /* direct output, active low */
+#define PNL_PAUTOLF            0x02    /* inverted output, active low */
+#define PNL_PSTROBE            0x01    /* inverted output */
+
+#define PNL_PD0                        0x01
+#define PNL_PD1                        0x02
+#define PNL_PD2                        0x04
+#define PNL_PD3                        0x08
+#define PNL_PD4                        0x10
+#define PNL_PD5                        0x20
+#define PNL_PD6                        0x40
+#define PNL_PD7                        0x80
+
+#define PIN_NONE               0
+#define PIN_STROBE             1
+#define PIN_D0                 2
+#define PIN_D1                 3
+#define PIN_D2                 4
+#define PIN_D3                 5
+#define PIN_D4                 6
+#define PIN_D5                 7
+#define PIN_D6                 8
+#define PIN_D7                 9
+#define PIN_AUTOLF             14
+#define PIN_INITP              16
+#define PIN_SELECP             17
+#define PIN_NOT_SET            127
+
+#define LCD_FLAG_S             0x0001
+#define LCD_FLAG_ID            0x0002
+#define LCD_FLAG_B             0x0004  /* blink on */
+#define LCD_FLAG_C             0x0008  /* cursor on */
+#define LCD_FLAG_D             0x0010  /* display on */
+#define LCD_FLAG_F             0x0020  /* large font mode */
+#define LCD_FLAG_N             0x0040  /* 2-rows mode */
+#define LCD_FLAG_L             0x0080  /* backlight enabled */
+
+/* LCD commands */
+#define LCD_CMD_DISPLAY_CLEAR  0x01    /* Clear entire display */
+
+#define LCD_CMD_ENTRY_MODE     0x04    /* Set entry mode */
+#define LCD_CMD_CURSOR_INC     0x02    /* Increment cursor */
+
+#define LCD_CMD_DISPLAY_CTRL   0x08    /* Display control */
+#define LCD_CMD_DISPLAY_ON     0x04    /* Set display on */
+#define LCD_CMD_CURSOR_ON      0x02    /* Set cursor on */
+#define LCD_CMD_BLINK_ON       0x01    /* Set blink on */
+
+#define LCD_CMD_SHIFT          0x10    /* Shift cursor/display */
+#define LCD_CMD_DISPLAY_SHIFT  0x08    /* Shift display instead of cursor */
+#define LCD_CMD_SHIFT_RIGHT    0x04    /* Shift display/cursor to the right */
+
+#define LCD_CMD_FUNCTION_SET   0x20    /* Set function */
+#define LCD_CMD_DATA_LEN_8BITS 0x10    /* Set data length to 8 bits */
+#define LCD_CMD_TWO_LINES      0x08    /* Set to two display lines */
+#define LCD_CMD_FONT_5X10_DOTS 0x04    /* Set char font to 5x10 dots */
+
+#define LCD_CMD_SET_CGRAM_ADDR 0x40    /* Set char generator RAM address */
+
+#define LCD_CMD_SET_DDRAM_ADDR 0x80    /* Set display data RAM address */
+
+#define LCD_ESCAPE_LEN         24      /* max chars for LCD escape command */
+#define LCD_ESCAPE_CHAR        27      /* use char 27 for escape command */
+
+#define NOT_SET                        -1
+
+/* macros to simplify use of the parallel port */
+#define r_ctr(x)        (parport_read_control((x)->port))
+#define r_dtr(x)        (parport_read_data((x)->port))
+#define r_str(x)        (parport_read_status((x)->port))
+#define w_ctr(x, y)     (parport_write_control((x)->port, (y)))
+#define w_dtr(x, y)     (parport_write_data((x)->port, (y)))
+
+/* this defines which bits are to be used and which ones to be ignored */
+/* logical or of the output bits involved in the scan matrix */
+static __u8 scan_mask_o;
+/* logical or of the input bits involved in the scan matrix */
+static __u8 scan_mask_i;
+
+enum input_type {
+       INPUT_TYPE_STD,
+       INPUT_TYPE_KBD,
+};
+
+enum input_state {
+       INPUT_ST_LOW,
+       INPUT_ST_RISING,
+       INPUT_ST_HIGH,
+       INPUT_ST_FALLING,
+};
+
+struct logical_input {
+       struct list_head list;
+       __u64 mask;
+       __u64 value;
+       enum input_type type;
+       enum input_state state;
+       __u8 rise_time, fall_time;
+       __u8 rise_timer, fall_timer, high_timer;
+
+       union {
+               struct {        /* valid when type == INPUT_TYPE_STD */
+                       void (*press_fct)(int);
+                       void (*release_fct)(int);
+                       int press_data;
+                       int release_data;
+               } std;
+               struct {        /* valid when type == INPUT_TYPE_KBD */
+                       /* strings can be non null-terminated */
+                       char press_str[sizeof(void *) + sizeof(int)];
+                       char repeat_str[sizeof(void *) + sizeof(int)];
+                       char release_str[sizeof(void *) + sizeof(int)];
+               } kbd;
+       } u;
+};
+
+static LIST_HEAD(logical_inputs);      /* list of all defined logical inputs */
+
+/* physical contacts history
+ * Physical contacts are a 45 bits string of 9 groups of 5 bits each.
+ * The 8 lower groups correspond to output bits 0 to 7, and the 9th group
+ * corresponds to the ground.
+ * Within each group, bits are stored in the same order as read on the port :
+ * BAPSE (busy=4, ack=3, paper empty=2, select=1, error=0).
+ * So, each __u64 is represented like this :
+ * 0000000000000000000BAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSE
+ * <-----unused------><gnd><d07><d06><d05><d04><d03><d02><d01><d00>
+ */
+
+/* what has just been read from the I/O ports */
+static __u64 phys_read;
+/* previous phys_read */
+static __u64 phys_read_prev;
+/* stabilized phys_read (phys_read|phys_read_prev) */
+static __u64 phys_curr;
+/* previous phys_curr */
+static __u64 phys_prev;
+/* 0 means that at least one logical signal needs be computed */
+static char inputs_stable;
+
+/* these variables are specific to the keypad */
+static struct {
+       bool enabled;
+} keypad;
+
+static char keypad_buffer[KEYPAD_BUFFER];
+static int keypad_buflen;
+static int keypad_start;
+static char keypressed;
+static wait_queue_head_t keypad_read_wait;
+
+/* lcd-specific variables */
+static struct {
+       bool enabled;
+       bool initialized;
+       bool must_clear;
+
+       int height;
+       int width;
+       int bwidth;
+       int hwidth;
+       int charset;
+       int proto;
+       int light_tempo;
+
+       /* TODO: use union here? */
+       struct {
+               int e;
+               int rs;
+               int rw;
+               int cl;
+               int da;
+               int bl;
+       } pins;
+
+       /* contains the LCD config state */
+       unsigned long int flags;
+
+       /* Contains the LCD X and Y offset */
+       struct {
+               unsigned long int x;
+               unsigned long int y;
+       } addr;
+
+       /* Current escape sequence and it's length or -1 if outside */
+       struct {
+               char buf[LCD_ESCAPE_LEN + 1];
+               int len;
+       } esc_seq;
+} lcd;
+
+/* Needed only for init */
+static int selected_lcd_type = NOT_SET;
+
+/*
+ * Bit masks to convert LCD signals to parallel port outputs.
+ * _d_ are values for data port, _c_ are for control port.
+ * [0] = signal OFF, [1] = signal ON, [2] = mask
+ */
+#define BIT_CLR                0
+#define BIT_SET                1
+#define BIT_MSK                2
+#define BIT_STATES     3
+/*
+ * one entry for each bit on the LCD
+ */
+#define LCD_BIT_E      0
+#define LCD_BIT_RS     1
+#define LCD_BIT_RW     2
+#define LCD_BIT_BL     3
+#define LCD_BIT_CL     4
+#define LCD_BIT_DA     5
+#define LCD_BITS       6
+
+/*
+ * each bit can be either connected to a DATA or CTRL port
+ */
+#define LCD_PORT_C     0
+#define LCD_PORT_D     1
+#define LCD_PORTS      2
+
+static unsigned char lcd_bits[LCD_PORTS][LCD_BITS][BIT_STATES];
+
+/*
+ * LCD protocols
+ */
+#define LCD_PROTO_PARALLEL      0
+#define LCD_PROTO_SERIAL        1
+#define LCD_PROTO_TI_DA8XX_LCD 2
+
+/*
+ * LCD character sets
+ */
+#define LCD_CHARSET_NORMAL      0
+#define LCD_CHARSET_KS0074      1
+
+/*
+ * LCD types
+ */
+#define LCD_TYPE_NONE          0
+#define LCD_TYPE_CUSTOM                1
+#define LCD_TYPE_OLD           2
+#define LCD_TYPE_KS0074                3
+#define LCD_TYPE_HANTRONIX     4
+#define LCD_TYPE_NEXCOM                5
+
+/*
+ * keypad types
+ */
+#define KEYPAD_TYPE_NONE       0
+#define KEYPAD_TYPE_OLD                1
+#define KEYPAD_TYPE_NEW                2
+#define KEYPAD_TYPE_NEXCOM     3
+
+/*
+ * panel profiles
+ */
+#define PANEL_PROFILE_CUSTOM   0
+#define PANEL_PROFILE_OLD      1
+#define PANEL_PROFILE_NEW      2
+#define PANEL_PROFILE_HANTRONIX        3
+#define PANEL_PROFILE_NEXCOM   4
+#define PANEL_PROFILE_LARGE    5
+
+/*
+ * Construct custom config from the kernel's configuration
+ */
+#define DEFAULT_PARPORT         0
+#define DEFAULT_PROFILE         PANEL_PROFILE_LARGE
+#define DEFAULT_KEYPAD_TYPE     KEYPAD_TYPE_OLD
+#define DEFAULT_LCD_TYPE        LCD_TYPE_OLD
+#define DEFAULT_LCD_HEIGHT      2
+#define DEFAULT_LCD_WIDTH       40
+#define DEFAULT_LCD_BWIDTH      40
+#define DEFAULT_LCD_HWIDTH      64
+#define DEFAULT_LCD_CHARSET     LCD_CHARSET_NORMAL
+#define DEFAULT_LCD_PROTO       LCD_PROTO_PARALLEL
+
+#define DEFAULT_LCD_PIN_E       PIN_AUTOLF
+#define DEFAULT_LCD_PIN_RS      PIN_SELECP
+#define DEFAULT_LCD_PIN_RW      PIN_INITP
+#define DEFAULT_LCD_PIN_SCL     PIN_STROBE
+#define DEFAULT_LCD_PIN_SDA     PIN_D0
+#define DEFAULT_LCD_PIN_BL      PIN_NOT_SET
+
+#ifdef CONFIG_PANEL_PARPORT
+#undef DEFAULT_PARPORT
+#define DEFAULT_PARPORT CONFIG_PANEL_PARPORT
+#endif
+
+#ifdef CONFIG_PANEL_PROFILE
+#undef DEFAULT_PROFILE
+#define DEFAULT_PROFILE CONFIG_PANEL_PROFILE
+#endif
+
+#if DEFAULT_PROFILE == 0       /* custom */
+#ifdef CONFIG_PANEL_KEYPAD
+#undef DEFAULT_KEYPAD_TYPE
+#define DEFAULT_KEYPAD_TYPE CONFIG_PANEL_KEYPAD
+#endif
+
+#ifdef CONFIG_PANEL_LCD
+#undef DEFAULT_LCD_TYPE
+#define DEFAULT_LCD_TYPE CONFIG_PANEL_LCD
+#endif
+
+#ifdef CONFIG_PANEL_LCD_HEIGHT
+#undef DEFAULT_LCD_HEIGHT
+#define DEFAULT_LCD_HEIGHT CONFIG_PANEL_LCD_HEIGHT
+#endif
+
+#ifdef CONFIG_PANEL_LCD_WIDTH
+#undef DEFAULT_LCD_WIDTH
+#define DEFAULT_LCD_WIDTH CONFIG_PANEL_LCD_WIDTH
+#endif
+
+#ifdef CONFIG_PANEL_LCD_BWIDTH
+#undef DEFAULT_LCD_BWIDTH
+#define DEFAULT_LCD_BWIDTH CONFIG_PANEL_LCD_BWIDTH
+#endif
+
+#ifdef CONFIG_PANEL_LCD_HWIDTH
+#undef DEFAULT_LCD_HWIDTH
+#define DEFAULT_LCD_HWIDTH CONFIG_PANEL_LCD_HWIDTH
+#endif
+
+#ifdef CONFIG_PANEL_LCD_CHARSET
+#undef DEFAULT_LCD_CHARSET
+#define DEFAULT_LCD_CHARSET CONFIG_PANEL_LCD_CHARSET
+#endif
+
+#ifdef CONFIG_PANEL_LCD_PROTO
+#undef DEFAULT_LCD_PROTO
+#define DEFAULT_LCD_PROTO CONFIG_PANEL_LCD_PROTO
+#endif
+
+#ifdef CONFIG_PANEL_LCD_PIN_E
+#undef DEFAULT_LCD_PIN_E
+#define DEFAULT_LCD_PIN_E CONFIG_PANEL_LCD_PIN_E
+#endif
+
+#ifdef CONFIG_PANEL_LCD_PIN_RS
+#undef DEFAULT_LCD_PIN_RS
+#define DEFAULT_LCD_PIN_RS CONFIG_PANEL_LCD_PIN_RS
+#endif
+
+#ifdef CONFIG_PANEL_LCD_PIN_RW
+#undef DEFAULT_LCD_PIN_RW
+#define DEFAULT_LCD_PIN_RW CONFIG_PANEL_LCD_PIN_RW
+#endif
+
+#ifdef CONFIG_PANEL_LCD_PIN_SCL
+#undef DEFAULT_LCD_PIN_SCL
+#define DEFAULT_LCD_PIN_SCL CONFIG_PANEL_LCD_PIN_SCL
+#endif
+
+#ifdef CONFIG_PANEL_LCD_PIN_SDA
+#undef DEFAULT_LCD_PIN_SDA
+#define DEFAULT_LCD_PIN_SDA CONFIG_PANEL_LCD_PIN_SDA
+#endif
+
+#ifdef CONFIG_PANEL_LCD_PIN_BL
+#undef DEFAULT_LCD_PIN_BL
+#define DEFAULT_LCD_PIN_BL CONFIG_PANEL_LCD_PIN_BL
+#endif
+
+#endif /* DEFAULT_PROFILE == 0 */
+
+/* global variables */
+
+/* Device single-open policy control */
+static atomic_t lcd_available = ATOMIC_INIT(1);
+static atomic_t keypad_available = ATOMIC_INIT(1);
+
+static struct pardevice *pprt;
+
+static int keypad_initialized;
+
+static void (*lcd_write_cmd)(int);
+static void (*lcd_write_data)(int);
+static void (*lcd_clear_fast)(void);
+
+static DEFINE_SPINLOCK(pprt_lock);
+static struct timer_list scan_timer;
+
+MODULE_DESCRIPTION("Generic parallel port LCD/Keypad driver");
+
+static int parport = DEFAULT_PARPORT;
+module_param(parport, int, 0000);
+MODULE_PARM_DESC(parport, "Parallel port index (0=lpt1, 1=lpt2, ...)");
+
+static int profile = DEFAULT_PROFILE;
+module_param(profile, int, 0000);
+MODULE_PARM_DESC(profile,
+                "1=16x2 old kp; 2=serial 16x2, new kp; 3=16x2 hantronix; "
+                "4=16x2 nexcom; default=40x2, old kp");
+
+static int keypad_type = NOT_SET;
+module_param(keypad_type, int, 0000);
+MODULE_PARM_DESC(keypad_type,
+                "Keypad type: 0=none, 1=old 6 keys, 2=new 6+1 keys, 3=nexcom 4 keys");
+
+static int lcd_type = NOT_SET;
+module_param(lcd_type, int, 0000);
+MODULE_PARM_DESC(lcd_type,
+                "LCD type: 0=none, 1=compiled-in, 2=old, 3=serial ks0074, 4=hantronix, 5=nexcom");
+
+static int lcd_height = NOT_SET;
+module_param(lcd_height, int, 0000);
+MODULE_PARM_DESC(lcd_height, "Number of lines on the LCD");
+
+static int lcd_width = NOT_SET;
+module_param(lcd_width, int, 0000);
+MODULE_PARM_DESC(lcd_width, "Number of columns on the LCD");
+
+static int lcd_bwidth = NOT_SET;       /* internal buffer width (usually 40) */
+module_param(lcd_bwidth, int, 0000);
+MODULE_PARM_DESC(lcd_bwidth, "Internal LCD line width (40)");
+
+static int lcd_hwidth = NOT_SET;       /* hardware buffer width (usually 64) */
+module_param(lcd_hwidth, int, 0000);
+MODULE_PARM_DESC(lcd_hwidth, "LCD line hardware address (64)");
+
+static int lcd_charset = NOT_SET;
+module_param(lcd_charset, int, 0000);
+MODULE_PARM_DESC(lcd_charset, "LCD character set: 0=standard, 1=KS0074");
+
+static int lcd_proto = NOT_SET;
+module_param(lcd_proto, int, 0000);
+MODULE_PARM_DESC(lcd_proto,
+                "LCD communication: 0=parallel (//), 1=serial, 2=TI LCD Interface");
+
+/*
+ * These are the parallel port pins the LCD control signals are connected to.
+ * Set this to 0 if the signal is not used. Set it to its opposite value
+ * (negative) if the signal is negated. -MAXINT is used to indicate that the
+ * pin has not been explicitly specified.
+ *
+ * WARNING! no check will be performed about collisions with keypad !
+ */
+
+static int lcd_e_pin  = PIN_NOT_SET;
+module_param(lcd_e_pin, int, 0000);
+MODULE_PARM_DESC(lcd_e_pin,
+                "# of the // port pin connected to LCD 'E' signal, with polarity (-17..17)");
+
+static int lcd_rs_pin = PIN_NOT_SET;
+module_param(lcd_rs_pin, int, 0000);
+MODULE_PARM_DESC(lcd_rs_pin,
+                "# of the // port pin connected to LCD 'RS' signal, with polarity (-17..17)");
+
+static int lcd_rw_pin = PIN_NOT_SET;
+module_param(lcd_rw_pin, int, 0000);
+MODULE_PARM_DESC(lcd_rw_pin,
+                "# of the // port pin connected to LCD 'RW' signal, with polarity (-17..17)");
+
+static int lcd_cl_pin = PIN_NOT_SET;
+module_param(lcd_cl_pin, int, 0000);
+MODULE_PARM_DESC(lcd_cl_pin,
+                "# of the // port pin connected to serial LCD 'SCL' signal, with polarity (-17..17)");
+
+static int lcd_da_pin = PIN_NOT_SET;
+module_param(lcd_da_pin, int, 0000);
+MODULE_PARM_DESC(lcd_da_pin,
+                "# of the // port pin connected to serial LCD 'SDA' signal, with polarity (-17..17)");
+
+static int lcd_bl_pin = PIN_NOT_SET;
+module_param(lcd_bl_pin, int, 0000);
+MODULE_PARM_DESC(lcd_bl_pin,
+                "# of the // port pin connected to LCD backlight, with polarity (-17..17)");
+
+/* Deprecated module parameters - consider not using them anymore */
+
+static int lcd_enabled = NOT_SET;
+module_param(lcd_enabled, int, 0000);
+MODULE_PARM_DESC(lcd_enabled, "Deprecated option, use lcd_type instead");
+
+static int keypad_enabled = NOT_SET;
+module_param(keypad_enabled, int, 0000);
+MODULE_PARM_DESC(keypad_enabled, "Deprecated option, use keypad_type instead");
+
+static const unsigned char *lcd_char_conv;
+
+/* for some LCD drivers (ks0074) we need a charset conversion table. */
+static const unsigned char lcd_char_conv_ks0074[256] = {
+       /*          0|8   1|9   2|A   3|B   4|C   5|D   6|E   7|F */
+       /* 0x00 */ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+       /* 0x08 */ 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+       /* 0x10 */ 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+       /* 0x18 */ 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
+       /* 0x20 */ 0x20, 0x21, 0x22, 0x23, 0xa2, 0x25, 0x26, 0x27,
+       /* 0x28 */ 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
+       /* 0x30 */ 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
+       /* 0x38 */ 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
+       /* 0x40 */ 0xa0, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
+       /* 0x48 */ 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
+       /* 0x50 */ 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
+       /* 0x58 */ 0x58, 0x59, 0x5a, 0xfa, 0xfb, 0xfc, 0x1d, 0xc4,
+       /* 0x60 */ 0x96, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
+       /* 0x68 */ 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
+       /* 0x70 */ 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
+       /* 0x78 */ 0x78, 0x79, 0x7a, 0xfd, 0xfe, 0xff, 0xce, 0x20,
+       /* 0x80 */ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
+       /* 0x88 */ 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
+       /* 0x90 */ 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
+       /* 0x98 */ 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
+       /* 0xA0 */ 0x20, 0x40, 0xb1, 0xa1, 0x24, 0xa3, 0xfe, 0x5f,
+       /* 0xA8 */ 0x22, 0xc8, 0x61, 0x14, 0x97, 0x2d, 0xad, 0x96,
+       /* 0xB0 */ 0x80, 0x8c, 0x82, 0x83, 0x27, 0x8f, 0x86, 0xdd,
+       /* 0xB8 */ 0x2c, 0x81, 0x6f, 0x15, 0x8b, 0x8a, 0x84, 0x60,
+       /* 0xC0 */ 0xe2, 0xe2, 0xe2, 0x5b, 0x5b, 0xae, 0xbc, 0xa9,
+       /* 0xC8 */ 0xc5, 0xbf, 0xc6, 0xf1, 0xe3, 0xe3, 0xe3, 0xe3,
+       /* 0xD0 */ 0x44, 0x5d, 0xa8, 0xe4, 0xec, 0xec, 0x5c, 0x78,
+       /* 0xD8 */ 0xab, 0xa6, 0xe5, 0x5e, 0x5e, 0xe6, 0xaa, 0xbe,
+       /* 0xE0 */ 0x7f, 0xe7, 0xaf, 0x7b, 0x7b, 0xaf, 0xbd, 0xc8,
+       /* 0xE8 */ 0xa4, 0xa5, 0xc7, 0xf6, 0xa7, 0xe8, 0x69, 0x69,
+       /* 0xF0 */ 0xed, 0x7d, 0xa8, 0xe4, 0xec, 0x5c, 0x5c, 0x25,
+       /* 0xF8 */ 0xac, 0xa6, 0xea, 0xef, 0x7e, 0xeb, 0xb2, 0x79,
+};
+
+static const char old_keypad_profile[][4][9] = {
+       {"S0", "Left\n", "Left\n", ""},
+       {"S1", "Down\n", "Down\n", ""},
+       {"S2", "Up\n", "Up\n", ""},
+       {"S3", "Right\n", "Right\n", ""},
+       {"S4", "Esc\n", "Esc\n", ""},
+       {"S5", "Ret\n", "Ret\n", ""},
+       {"", "", "", ""}
+};
+
+/* signals, press, repeat, release */
+static const char new_keypad_profile[][4][9] = {
+       {"S0", "Left\n", "Left\n", ""},
+       {"S1", "Down\n", "Down\n", ""},
+       {"S2", "Up\n", "Up\n", ""},
+       {"S3", "Right\n", "Right\n", ""},
+       {"S4s5", "", "Esc\n", "Esc\n"},
+       {"s4S5", "", "Ret\n", "Ret\n"},
+       {"S4S5", "Help\n", "", ""},
+       /* add new signals above this line */
+       {"", "", "", ""}
+};
+
+/* signals, press, repeat, release */
+static const char nexcom_keypad_profile[][4][9] = {
+       {"a-p-e-", "Down\n", "Down\n", ""},
+       {"a-p-E-", "Ret\n", "Ret\n", ""},
+       {"a-P-E-", "Esc\n", "Esc\n", ""},
+       {"a-P-e-", "Up\n", "Up\n", ""},
+       /* add new signals above this line */
+       {"", "", "", ""}
+};
+
+static const char (*keypad_profile)[4][9] = old_keypad_profile;
+
+/* FIXME: this should be converted to a bit array containing signals states */
+static struct {
+       unsigned char e;  /* parallel LCD E (data latch on falling edge) */
+       unsigned char rs; /* parallel LCD RS  (0 = cmd, 1 = data) */
+       unsigned char rw; /* parallel LCD R/W (0 = W, 1 = R) */
+       unsigned char bl; /* parallel LCD backlight (0 = off, 1 = on) */
+       unsigned char cl; /* serial LCD clock (latch on rising edge) */
+       unsigned char da; /* serial LCD data */
+} bits;
+
+static void init_scan_timer(void);
+
+/* sets data port bits according to current signals values */
+static int set_data_bits(void)
+{
+       int val, bit;
+
+       val = r_dtr(pprt);
+       for (bit = 0; bit < LCD_BITS; bit++)
+               val &= lcd_bits[LCD_PORT_D][bit][BIT_MSK];
+
+       val |= lcd_bits[LCD_PORT_D][LCD_BIT_E][bits.e]
+           | lcd_bits[LCD_PORT_D][LCD_BIT_RS][bits.rs]
+           | lcd_bits[LCD_PORT_D][LCD_BIT_RW][bits.rw]
+           | lcd_bits[LCD_PORT_D][LCD_BIT_BL][bits.bl]
+           | lcd_bits[LCD_PORT_D][LCD_BIT_CL][bits.cl]
+           | lcd_bits[LCD_PORT_D][LCD_BIT_DA][bits.da];
+
+       w_dtr(pprt, val);
+       return val;
+}
+
+/* sets ctrl port bits according to current signals values */
+static int set_ctrl_bits(void)
+{
+       int val, bit;
+
+       val = r_ctr(pprt);
+       for (bit = 0; bit < LCD_BITS; bit++)
+               val &= lcd_bits[LCD_PORT_C][bit][BIT_MSK];
+
+       val |= lcd_bits[LCD_PORT_C][LCD_BIT_E][bits.e]
+           | lcd_bits[LCD_PORT_C][LCD_BIT_RS][bits.rs]
+           | lcd_bits[LCD_PORT_C][LCD_BIT_RW][bits.rw]
+           | lcd_bits[LCD_PORT_C][LCD_BIT_BL][bits.bl]
+           | lcd_bits[LCD_PORT_C][LCD_BIT_CL][bits.cl]
+           | lcd_bits[LCD_PORT_C][LCD_BIT_DA][bits.da];
+
+       w_ctr(pprt, val);
+       return val;
+}
+
+/* sets ctrl & data port bits according to current signals values */
+static void panel_set_bits(void)
+{
+       set_data_bits();
+       set_ctrl_bits();
+}
+
+/*
+ * Converts a parallel port pin (from -25 to 25) to data and control ports
+ * masks, and data and control port bits. The signal will be considered
+ * unconnected if it's on pin 0 or an invalid pin (<-25 or >25).
+ *
+ * Result will be used this way :
+ *   out(dport, in(dport) & d_val[2] | d_val[signal_state])
+ *   out(cport, in(cport) & c_val[2] | c_val[signal_state])
+ */
+static void pin_to_bits(int pin, unsigned char *d_val, unsigned char *c_val)
+{
+       int d_bit, c_bit, inv;
+
+       d_val[0] = 0;
+       c_val[0] = 0;
+       d_val[1] = 0;
+       c_val[1] = 0;
+       d_val[2] = 0xFF;
+       c_val[2] = 0xFF;
+
+       if (pin == 0)
+               return;
+
+       inv = (pin < 0);
+       if (inv)
+               pin = -pin;
+
+       d_bit = 0;
+       c_bit = 0;
+
+       switch (pin) {
+       case PIN_STROBE:        /* strobe, inverted */
+               c_bit = PNL_PSTROBE;
+               inv = !inv;
+               break;
+       case PIN_D0...PIN_D7:   /* D0 - D7 = 2 - 9 */
+               d_bit = 1 << (pin - 2);
+               break;
+       case PIN_AUTOLF:        /* autofeed, inverted */
+               c_bit = PNL_PAUTOLF;
+               inv = !inv;
+               break;
+       case PIN_INITP:         /* init, direct */
+               c_bit = PNL_PINITP;
+               break;
+       case PIN_SELECP:        /* select_in, inverted */
+               c_bit = PNL_PSELECP;
+               inv = !inv;
+               break;
+       default:                /* unknown pin, ignore */
+               break;
+       }
+
+       if (c_bit) {
+               c_val[2] &= ~c_bit;
+               c_val[!inv] = c_bit;
+       } else if (d_bit) {
+               d_val[2] &= ~d_bit;
+               d_val[!inv] = d_bit;
+       }
+}
+
+/* sleeps that many milliseconds with a reschedule */
+static void long_sleep(int ms)
+{
+       if (in_interrupt())
+               mdelay(ms);
+       else
+               schedule_timeout_interruptible(msecs_to_jiffies(ms));
+}
+
+/*
+ * send a serial byte to the LCD panel. The caller is responsible for locking
+ * if needed.
+ */
+static void lcd_send_serial(int byte)
+{
+       int bit;
+
+       /*
+        * the data bit is set on D0, and the clock on STROBE.
+        * LCD reads D0 on STROBE's rising edge.
+        */
+       for (bit = 0; bit < 8; bit++) {
+               bits.cl = BIT_CLR;      /* CLK low */
+               panel_set_bits();
+               bits.da = byte & 1;
+               panel_set_bits();
+               udelay(2);  /* maintain the data during 2 us before CLK up */
+               bits.cl = BIT_SET;      /* CLK high */
+               panel_set_bits();
+               udelay(1);  /* maintain the strobe during 1 us */
+               byte >>= 1;
+       }
+}
+
+/* turn the backlight on or off */
+static void lcd_backlight(int on)
+{
+       if (lcd.pins.bl == PIN_NONE)
+               return;
+
+       /* The backlight is activated by setting the AUTOFEED line to +5V  */
+       spin_lock_irq(&pprt_lock);
+       bits.bl = on;
+       panel_set_bits();
+       spin_unlock_irq(&pprt_lock);
+}
+
+/* send a command to the LCD panel in serial mode */
+static void lcd_write_cmd_s(int cmd)
+{
+       spin_lock_irq(&pprt_lock);
+       lcd_send_serial(0x1F);  /* R/W=W, RS=0 */
+       lcd_send_serial(cmd & 0x0F);
+       lcd_send_serial((cmd >> 4) & 0x0F);
+       udelay(40);             /* the shortest command takes at least 40 us */
+       spin_unlock_irq(&pprt_lock);
+}
+
+/* send data to the LCD panel in serial mode */
+static void lcd_write_data_s(int data)
+{
+       spin_lock_irq(&pprt_lock);
+       lcd_send_serial(0x5F);  /* R/W=W, RS=1 */
+       lcd_send_serial(data & 0x0F);
+       lcd_send_serial((data >> 4) & 0x0F);
+       udelay(40);             /* the shortest data takes at least 40 us */
+       spin_unlock_irq(&pprt_lock);
+}
+
+/* send a command to the LCD panel in 8 bits parallel mode */
+static void lcd_write_cmd_p8(int cmd)
+{
+       spin_lock_irq(&pprt_lock);
+       /* present the data to the data port */
+       w_dtr(pprt, cmd);
+       udelay(20);     /* maintain the data during 20 us before the strobe */
+
+       bits.e = BIT_SET;
+       bits.rs = BIT_CLR;
+       bits.rw = BIT_CLR;
+       set_ctrl_bits();
+
+       udelay(40);     /* maintain the strobe during 40 us */
+
+       bits.e = BIT_CLR;
+       set_ctrl_bits();
+
+       udelay(120);    /* the shortest command takes at least 120 us */
+       spin_unlock_irq(&pprt_lock);
+}
+
+/* send data to the LCD panel in 8 bits parallel mode */
+static void lcd_write_data_p8(int data)
+{
+       spin_lock_irq(&pprt_lock);
+       /* present the data to the data port */
+       w_dtr(pprt, data);
+       udelay(20);     /* maintain the data during 20 us before the strobe */
+
+       bits.e = BIT_SET;
+       bits.rs = BIT_SET;
+       bits.rw = BIT_CLR;
+       set_ctrl_bits();
+
+       udelay(40);     /* maintain the strobe during 40 us */
+
+       bits.e = BIT_CLR;
+       set_ctrl_bits();
+
+       udelay(45);     /* the shortest data takes at least 45 us */
+       spin_unlock_irq(&pprt_lock);
+}
+
+/* send a command to the TI LCD panel */
+static void lcd_write_cmd_tilcd(int cmd)
+{
+       spin_lock_irq(&pprt_lock);
+       /* present the data to the control port */
+       w_ctr(pprt, cmd);
+       udelay(60);
+       spin_unlock_irq(&pprt_lock);
+}
+
+/* send data to the TI LCD panel */
+static void lcd_write_data_tilcd(int data)
+{
+       spin_lock_irq(&pprt_lock);
+       /* present the data to the data port */
+       w_dtr(pprt, data);
+       udelay(60);
+       spin_unlock_irq(&pprt_lock);
+}
+
+static void lcd_gotoxy(void)
+{
+       lcd_write_cmd(LCD_CMD_SET_DDRAM_ADDR
+                     | (lcd.addr.y ? lcd.hwidth : 0)
+                     /*
+                      * we force the cursor to stay at the end of the
+                      * line if it wants to go farther
+                      */
+                     | ((lcd.addr.x < lcd.bwidth) ? lcd.addr.x &
+                        (lcd.hwidth - 1) : lcd.bwidth - 1));
+}
+
+static void lcd_print(char c)
+{
+       if (lcd.addr.x < lcd.bwidth) {
+               if (lcd_char_conv)
+                       c = lcd_char_conv[(unsigned char)c];
+               lcd_write_data(c);
+               lcd.addr.x++;
+       }
+       /* prevents the cursor from wrapping onto the next line */
+       if (lcd.addr.x == lcd.bwidth)
+               lcd_gotoxy();
+}
+
+/* fills the display with spaces and resets X/Y */
+static void lcd_clear_fast_s(void)
+{
+       int pos;
+
+       lcd.addr.x = 0;
+       lcd.addr.y = 0;
+       lcd_gotoxy();
+
+       spin_lock_irq(&pprt_lock);
+       for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) {
+               lcd_send_serial(0x5F);  /* R/W=W, RS=1 */
+               lcd_send_serial(' ' & 0x0F);
+               lcd_send_serial((' ' >> 4) & 0x0F);
+               /* the shortest data takes at least 40 us */
+               udelay(40);
+       }
+       spin_unlock_irq(&pprt_lock);
+
+       lcd.addr.x = 0;
+       lcd.addr.y = 0;
+       lcd_gotoxy();
+}
+
+/* fills the display with spaces and resets X/Y */
+static void lcd_clear_fast_p8(void)
+{
+       int pos;
+
+       lcd.addr.x = 0;
+       lcd.addr.y = 0;
+       lcd_gotoxy();
+
+       spin_lock_irq(&pprt_lock);
+       for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) {
+               /* present the data to the data port */
+               w_dtr(pprt, ' ');
+
+               /* maintain the data during 20 us before the strobe */
+               udelay(20);
+
+               bits.e = BIT_SET;
+               bits.rs = BIT_SET;
+               bits.rw = BIT_CLR;
+               set_ctrl_bits();
+
+               /* maintain the strobe during 40 us */
+               udelay(40);
+
+               bits.e = BIT_CLR;
+               set_ctrl_bits();
+
+               /* the shortest data takes at least 45 us */
+               udelay(45);
+       }
+       spin_unlock_irq(&pprt_lock);
+
+       lcd.addr.x = 0;
+       lcd.addr.y = 0;
+       lcd_gotoxy();
+}
+
+/* fills the display with spaces and resets X/Y */
+static void lcd_clear_fast_tilcd(void)
+{
+       int pos;
+
+       lcd.addr.x = 0;
+       lcd.addr.y = 0;
+       lcd_gotoxy();
+
+       spin_lock_irq(&pprt_lock);
+       for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) {
+               /* present the data to the data port */
+               w_dtr(pprt, ' ');
+               udelay(60);
+       }
+
+       spin_unlock_irq(&pprt_lock);
+
+       lcd.addr.x = 0;
+       lcd.addr.y = 0;
+       lcd_gotoxy();
+}
+
+/* clears the display and resets X/Y */
+static void lcd_clear_display(void)
+{
+       lcd_write_cmd(LCD_CMD_DISPLAY_CLEAR);
+       lcd.addr.x = 0;
+       lcd.addr.y = 0;
+       /* we must wait a few milliseconds (15) */
+       long_sleep(15);
+}
+
+static void lcd_init_display(void)
+{
+       lcd.flags = ((lcd.height > 1) ? LCD_FLAG_N : 0)
+           | LCD_FLAG_D | LCD_FLAG_C | LCD_FLAG_B;
+
+       long_sleep(20);         /* wait 20 ms after power-up for the paranoid */
+
+       /* 8bits, 1 line, small fonts; let's do it 3 times */
+       lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS);
+       long_sleep(10);
+       lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS);
+       long_sleep(10);
+       lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS);
+       long_sleep(10);
+
+       /* set font height and lines number */
+       lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS
+                     | ((lcd.flags & LCD_FLAG_F) ? LCD_CMD_FONT_5X10_DOTS : 0)
+                     | ((lcd.flags & LCD_FLAG_N) ? LCD_CMD_TWO_LINES : 0)
+           );
+       long_sleep(10);
+
+       /* display off, cursor off, blink off */
+       lcd_write_cmd(LCD_CMD_DISPLAY_CTRL);
+       long_sleep(10);
+
+       lcd_write_cmd(LCD_CMD_DISPLAY_CTRL      /* set display mode */
+                     | ((lcd.flags & LCD_FLAG_D) ? LCD_CMD_DISPLAY_ON : 0)
+                     | ((lcd.flags & LCD_FLAG_C) ? LCD_CMD_CURSOR_ON : 0)
+                     | ((lcd.flags & LCD_FLAG_B) ? LCD_CMD_BLINK_ON : 0)
+           );
+
+       lcd_backlight((lcd.flags & LCD_FLAG_L) ? 1 : 0);
+
+       long_sleep(10);
+
+       /* entry mode set : increment, cursor shifting */
+       lcd_write_cmd(LCD_CMD_ENTRY_MODE | LCD_CMD_CURSOR_INC);
+
+       lcd_clear_display();
+}
+
+/*
+ * These are the file operation function for user access to /dev/lcd
+ * This function can also be called from inside the kernel, by
+ * setting file and ppos to NULL.
+ *
+ */
+
+static inline int handle_lcd_special_code(void)
+{
+       /* LCD special codes */
+
+       int processed = 0;
+
+       char *esc = lcd.esc_seq.buf + 2;
+       int oldflags = lcd.flags;
+
+       /* check for display mode flags */
+       switch (*esc) {
+       case 'D':       /* Display ON */
+               lcd.flags |= LCD_FLAG_D;
+               processed = 1;
+               break;
+       case 'd':       /* Display OFF */
+               lcd.flags &= ~LCD_FLAG_D;
+               processed = 1;
+               break;
+       case 'C':       /* Cursor ON */
+               lcd.flags |= LCD_FLAG_C;
+               processed = 1;
+               break;
+       case 'c':       /* Cursor OFF */
+               lcd.flags &= ~LCD_FLAG_C;
+               processed = 1;
+               break;
+       case 'B':       /* Blink ON */
+               lcd.flags |= LCD_FLAG_B;
+               processed = 1;
+               break;
+       case 'b':       /* Blink OFF */
+               lcd.flags &= ~LCD_FLAG_B;
+               processed = 1;
+               break;
+       case '+':       /* Back light ON */
+               lcd.flags |= LCD_FLAG_L;
+               processed = 1;
+               break;
+       case '-':       /* Back light OFF */
+               lcd.flags &= ~LCD_FLAG_L;
+               processed = 1;
+               break;
+       case '*':
+               /* flash back light using the keypad timer */
+               if (scan_timer.function) {
+                       if (lcd.light_tempo == 0 &&
+                           ((lcd.flags & LCD_FLAG_L) == 0))
+                               lcd_backlight(1);
+                       lcd.light_tempo = FLASH_LIGHT_TEMPO;
+               }
+               processed = 1;
+               break;
+       case 'f':       /* Small Font */
+               lcd.flags &= ~LCD_FLAG_F;
+               processed = 1;
+               break;
+       case 'F':       /* Large Font */
+               lcd.flags |= LCD_FLAG_F;
+               processed = 1;
+               break;
+       case 'n':       /* One Line */
+               lcd.flags &= ~LCD_FLAG_N;
+               processed = 1;
+               break;
+       case 'N':       /* Two Lines */
+               lcd.flags |= LCD_FLAG_N;
+               break;
+       case 'l':       /* Shift Cursor Left */
+               if (lcd.addr.x > 0) {
+                       /* back one char if not at end of line */
+                       if (lcd.addr.x < lcd.bwidth)
+                               lcd_write_cmd(LCD_CMD_SHIFT);
+                       lcd.addr.x--;
+               }
+               processed = 1;
+               break;
+       case 'r':       /* shift cursor right */
+               if (lcd.addr.x < lcd.width) {
+                       /* allow the cursor to pass the end of the line */
+                       if (lcd.addr.x < (lcd.bwidth - 1))
+                               lcd_write_cmd(LCD_CMD_SHIFT |
+                                               LCD_CMD_SHIFT_RIGHT);
+                       lcd.addr.x++;
+               }
+               processed = 1;
+               break;
+       case 'L':       /* shift display left */
+               lcd_write_cmd(LCD_CMD_SHIFT | LCD_CMD_DISPLAY_SHIFT);
+               processed = 1;
+               break;
+       case 'R':       /* shift display right */
+               lcd_write_cmd(LCD_CMD_SHIFT | LCD_CMD_DISPLAY_SHIFT |
+                               LCD_CMD_SHIFT_RIGHT);
+               processed = 1;
+               break;
+       case 'k': {     /* kill end of line */
+               int x;
+
+               for (x = lcd.addr.x; x < lcd.bwidth; x++)
+                       lcd_write_data(' ');
+
+               /* restore cursor position */
+               lcd_gotoxy();
+               processed = 1;
+               break;
+       }
+       case 'I':       /* reinitialize display */
+               lcd_init_display();
+               processed = 1;
+               break;
+       case 'G': {
+               /* Generator : LGcxxxxx...xx; must have <c> between '0'
+                * and '7', representing the numerical ASCII code of the
+                * redefined character, and <xx...xx> a sequence of 16
+                * hex digits representing 8 bytes for each character.
+                * Most LCDs will only use 5 lower bits of the 7 first
+                * bytes.
+                */
+
+               unsigned char cgbytes[8];
+               unsigned char cgaddr;
+               int cgoffset;
+               int shift;
+               char value;
+               int addr;
+
+               if (!strchr(esc, ';'))
+                       break;
+
+               esc++;
+
+               cgaddr = *(esc++) - '0';
+               if (cgaddr > 7) {
+                       processed = 1;
+                       break;
+               }
+
+               cgoffset = 0;
+               shift = 0;
+               value = 0;
+               while (*esc && cgoffset < 8) {
+                       shift ^= 4;
+                       if (*esc >= '0' && *esc <= '9') {
+                               value |= (*esc - '0') << shift;
+                       } else if (*esc >= 'A' && *esc <= 'Z') {
+                               value |= (*esc - 'A' + 10) << shift;
+                       } else if (*esc >= 'a' && *esc <= 'z') {
+                               value |= (*esc - 'a' + 10) << shift;
+                       } else {
+                               esc++;
+                               continue;
+                       }
+
+                       if (shift == 0) {
+                               cgbytes[cgoffset++] = value;
+                               value = 0;
+                       }
+
+                       esc++;
+               }
+
+               lcd_write_cmd(LCD_CMD_SET_CGRAM_ADDR | (cgaddr * 8));
+               for (addr = 0; addr < cgoffset; addr++)
+                       lcd_write_data(cgbytes[addr]);
+
+               /* ensures that we stop writing to CGRAM */
+               lcd_gotoxy();
+               processed = 1;
+               break;
+       }
+       case 'x':       /* gotoxy : LxXXX[yYYY]; */
+       case 'y':       /* gotoxy : LyYYY[xXXX]; */
+               if (!strchr(esc, ';'))
+                       break;
+
+               while (*esc) {
+                       if (*esc == 'x') {
+                               esc++;
+                               if (kstrtoul(esc, 10, &lcd.addr.x) < 0)
+                                       break;
+                       } else if (*esc == 'y') {
+                               esc++;
+                               if (kstrtoul(esc, 10, &lcd.addr.y) < 0)
+                                       break;
+                       } else {
+                               break;
+                       }
+               }
+
+               lcd_gotoxy();
+               processed = 1;
+               break;
+       }
+
+       /* TODO: This indent party here got ugly, clean it! */
+       /* Check whether one flag was changed */
+       if (oldflags != lcd.flags) {
+               /* check whether one of B,C,D flags were changed */
+               if ((oldflags ^ lcd.flags) &
+                   (LCD_FLAG_B | LCD_FLAG_C | LCD_FLAG_D))
+                       /* set display mode */
+                       lcd_write_cmd(LCD_CMD_DISPLAY_CTRL
+                                     | ((lcd.flags & LCD_FLAG_D)
+                                                     ? LCD_CMD_DISPLAY_ON : 0)
+                                     | ((lcd.flags & LCD_FLAG_C)
+                                                     ? LCD_CMD_CURSOR_ON : 0)
+                                     | ((lcd.flags & LCD_FLAG_B)
+                                                     ? LCD_CMD_BLINK_ON : 0));
+               /* check whether one of F,N flags was changed */
+               else if ((oldflags ^ lcd.flags) & (LCD_FLAG_F | LCD_FLAG_N))
+                       lcd_write_cmd(LCD_CMD_FUNCTION_SET
+                                     | LCD_CMD_DATA_LEN_8BITS
+                                     | ((lcd.flags & LCD_FLAG_F)
+                                                     ? LCD_CMD_TWO_LINES : 0)
+                                     | ((lcd.flags & LCD_FLAG_N)
+                                                     ? LCD_CMD_FONT_5X10_DOTS
+                                                                     : 0));
+               /* check whether L flag was changed */
+               else if ((oldflags ^ lcd.flags) & (LCD_FLAG_L)) {
+                       if (lcd.flags & (LCD_FLAG_L))
+                               lcd_backlight(1);
+                       else if (lcd.light_tempo == 0)
+                               /*
+                                * switch off the light only when the tempo
+                                * lighting is gone
+                                */
+                               lcd_backlight(0);
+               }
+       }
+
+       return processed;
+}
+
+static void lcd_write_char(char c)
+{
+       /* first, we'll test if we're in escape mode */
+       if ((c != '\n') && lcd.esc_seq.len >= 0) {
+               /* yes, let's add this char to the buffer */
+               lcd.esc_seq.buf[lcd.esc_seq.len++] = c;
+               lcd.esc_seq.buf[lcd.esc_seq.len] = 0;
+       } else {
+               /* aborts any previous escape sequence */
+               lcd.esc_seq.len = -1;
+
+               switch (c) {
+               case LCD_ESCAPE_CHAR:
+                       /* start of an escape sequence */
+                       lcd.esc_seq.len = 0;
+                       lcd.esc_seq.buf[lcd.esc_seq.len] = 0;
+                       break;
+               case '\b':
+                       /* go back one char and clear it */
+                       if (lcd.addr.x > 0) {
+                               /*
+                                * check if we're not at the
+                                * end of the line
+                                */
+                               if (lcd.addr.x < lcd.bwidth)
+                                       /* back one char */
+                                       lcd_write_cmd(LCD_CMD_SHIFT);
+                               lcd.addr.x--;
+                       }
+                       /* replace with a space */
+                       lcd_write_data(' ');
+                       /* back one char again */
+                       lcd_write_cmd(LCD_CMD_SHIFT);
+                       break;
+               case '\014':
+                       /* quickly clear the display */
+                       lcd_clear_fast();
+                       break;
+               case '\n':
+                       /*
+                        * flush the remainder of the current line and
+                        * go to the beginning of the next line
+                        */
+                       for (; lcd.addr.x < lcd.bwidth; lcd.addr.x++)
+                               lcd_write_data(' ');
+                       lcd.addr.x = 0;
+                       lcd.addr.y = (lcd.addr.y + 1) % lcd.height;
+                       lcd_gotoxy();
+                       break;
+               case '\r':
+                       /* go to the beginning of the same line */
+                       lcd.addr.x = 0;
+                       lcd_gotoxy();
+                       break;
+               case '\t':
+                       /* print a space instead of the tab */
+                       lcd_print(' ');
+                       break;
+               default:
+                       /* simply print this char */
+                       lcd_print(c);
+                       break;
+               }
+       }
+
+       /*
+        * now we'll see if we're in an escape mode and if the current
+        * escape sequence can be understood.
+        */
+       if (lcd.esc_seq.len >= 2) {
+               int processed = 0;
+
+               if (!strcmp(lcd.esc_seq.buf, "[2J")) {
+                       /* clear the display */
+                       lcd_clear_fast();
+                       processed = 1;
+               } else if (!strcmp(lcd.esc_seq.buf, "[H")) {
+                       /* cursor to home */
+                       lcd.addr.x = 0;
+                       lcd.addr.y = 0;
+                       lcd_gotoxy();
+                       processed = 1;
+               }
+               /* codes starting with ^[[L */
+               else if ((lcd.esc_seq.len >= 3) &&
+                        (lcd.esc_seq.buf[0] == '[') &&
+                        (lcd.esc_seq.buf[1] == 'L')) {
+                       processed = handle_lcd_special_code();
+               }
+
+               /* LCD special escape codes */
+               /*
+                * flush the escape sequence if it's been processed
+                * or if it is getting too long.
+                */
+               if (processed || (lcd.esc_seq.len >= LCD_ESCAPE_LEN))
+                       lcd.esc_seq.len = -1;
+       } /* escape codes */
+}
+
+static ssize_t lcd_write(struct file *file,
+                        const char __user *buf, size_t count, loff_t *ppos)
+{
+       const char __user *tmp = buf;
+       char c;
+
+       for (; count-- > 0; (*ppos)++, tmp++) {
+               if (!in_interrupt() && (((count + 1) & 0x1f) == 0))
+                       /*
+                        * let's be a little nice with other processes
+                        * that need some CPU
+                        */
+                       schedule();
+
+               if (get_user(c, tmp))
+                       return -EFAULT;
+
+               lcd_write_char(c);
+       }
+
+       return tmp - buf;
+}
+
+static int lcd_open(struct inode *inode, struct file *file)
+{
+       if (!atomic_dec_and_test(&lcd_available))
+               return -EBUSY;  /* open only once at a time */
+
+       if (file->f_mode & FMODE_READ)  /* device is write-only */
+               return -EPERM;
+
+       if (lcd.must_clear) {
+               lcd_clear_display();
+               lcd.must_clear = false;
+       }
+       return nonseekable_open(inode, file);
+}
+
+static int lcd_release(struct inode *inode, struct file *file)
+{
+       atomic_inc(&lcd_available);
+       return 0;
+}
+
+static const struct file_operations lcd_fops = {
+       .write   = lcd_write,
+       .open    = lcd_open,
+       .release = lcd_release,
+       .llseek  = no_llseek,
+};
+
+static struct miscdevice lcd_dev = {
+       .minor  = LCD_MINOR,
+       .name   = "lcd",
+       .fops   = &lcd_fops,
+};
+
+/* public function usable from the kernel for any purpose */
+static void panel_lcd_print(const char *s)
+{
+       const char *tmp = s;
+       int count = strlen(s);
+
+       if (lcd.enabled && lcd.initialized) {
+               for (; count-- > 0; tmp++) {
+                       if (!in_interrupt() && (((count + 1) & 0x1f) == 0))
+                               /*
+                                * let's be a little nice with other processes
+                                * that need some CPU
+                                */
+                               schedule();
+
+                       lcd_write_char(*tmp);
+               }
+       }
+}
+
+/* initialize the LCD driver */
+static void lcd_init(void)
+{
+       switch (selected_lcd_type) {
+       case LCD_TYPE_OLD:
+               /* parallel mode, 8 bits */
+               lcd.proto = LCD_PROTO_PARALLEL;
+               lcd.charset = LCD_CHARSET_NORMAL;
+               lcd.pins.e = PIN_STROBE;
+               lcd.pins.rs = PIN_AUTOLF;
+
+               lcd.width = 40;
+               lcd.bwidth = 40;
+               lcd.hwidth = 64;
+               lcd.height = 2;
+               break;
+       case LCD_TYPE_KS0074:
+               /* serial mode, ks0074 */
+               lcd.proto = LCD_PROTO_SERIAL;
+               lcd.charset = LCD_CHARSET_KS0074;
+               lcd.pins.bl = PIN_AUTOLF;
+               lcd.pins.cl = PIN_STROBE;
+               lcd.pins.da = PIN_D0;
+
+               lcd.width = 16;
+               lcd.bwidth = 40;
+               lcd.hwidth = 16;
+               lcd.height = 2;
+               break;
+       case LCD_TYPE_NEXCOM:
+               /* parallel mode, 8 bits, generic */
+               lcd.proto = LCD_PROTO_PARALLEL;
+               lcd.charset = LCD_CHARSET_NORMAL;
+               lcd.pins.e = PIN_AUTOLF;
+               lcd.pins.rs = PIN_SELECP;
+               lcd.pins.rw = PIN_INITP;
+
+               lcd.width = 16;
+               lcd.bwidth = 40;
+               lcd.hwidth = 64;
+               lcd.height = 2;
+               break;
+       case LCD_TYPE_CUSTOM:
+               /* customer-defined */
+               lcd.proto = DEFAULT_LCD_PROTO;
+               lcd.charset = DEFAULT_LCD_CHARSET;
+               /* default geometry will be set later */
+               break;
+       case LCD_TYPE_HANTRONIX:
+               /* parallel mode, 8 bits, hantronix-like */
+       default:
+               lcd.proto = LCD_PROTO_PARALLEL;
+               lcd.charset = LCD_CHARSET_NORMAL;
+               lcd.pins.e = PIN_STROBE;
+               lcd.pins.rs = PIN_SELECP;
+
+               lcd.width = 16;
+               lcd.bwidth = 40;
+               lcd.hwidth = 64;
+               lcd.height = 2;
+               break;
+       }
+
+       /* Overwrite with module params set on loading */
+       if (lcd_height != NOT_SET)
+               lcd.height = lcd_height;
+       if (lcd_width != NOT_SET)
+               lcd.width = lcd_width;
+       if (lcd_bwidth != NOT_SET)
+               lcd.bwidth = lcd_bwidth;
+       if (lcd_hwidth != NOT_SET)
+               lcd.hwidth = lcd_hwidth;
+       if (lcd_charset != NOT_SET)
+               lcd.charset = lcd_charset;
+       if (lcd_proto != NOT_SET)
+               lcd.proto = lcd_proto;
+       if (lcd_e_pin != PIN_NOT_SET)
+               lcd.pins.e = lcd_e_pin;
+       if (lcd_rs_pin != PIN_NOT_SET)
+               lcd.pins.rs = lcd_rs_pin;
+       if (lcd_rw_pin != PIN_NOT_SET)
+               lcd.pins.rw = lcd_rw_pin;
+       if (lcd_cl_pin != PIN_NOT_SET)
+               lcd.pins.cl = lcd_cl_pin;
+       if (lcd_da_pin != PIN_NOT_SET)
+               lcd.pins.da = lcd_da_pin;
+       if (lcd_bl_pin != PIN_NOT_SET)
+               lcd.pins.bl = lcd_bl_pin;
+
+       /* this is used to catch wrong and default values */
+       if (lcd.width <= 0)
+               lcd.width = DEFAULT_LCD_WIDTH;
+       if (lcd.bwidth <= 0)
+               lcd.bwidth = DEFAULT_LCD_BWIDTH;
+       if (lcd.hwidth <= 0)
+               lcd.hwidth = DEFAULT_LCD_HWIDTH;
+       if (lcd.height <= 0)
+               lcd.height = DEFAULT_LCD_HEIGHT;
+
+       if (lcd.proto == LCD_PROTO_SERIAL) {    /* SERIAL */
+               lcd_write_cmd = lcd_write_cmd_s;
+               lcd_write_data = lcd_write_data_s;
+               lcd_clear_fast = lcd_clear_fast_s;
+
+               if (lcd.pins.cl == PIN_NOT_SET)
+                       lcd.pins.cl = DEFAULT_LCD_PIN_SCL;
+               if (lcd.pins.da == PIN_NOT_SET)
+                       lcd.pins.da = DEFAULT_LCD_PIN_SDA;
+
+       } else if (lcd.proto == LCD_PROTO_PARALLEL) {   /* PARALLEL */
+               lcd_write_cmd = lcd_write_cmd_p8;
+               lcd_write_data = lcd_write_data_p8;
+               lcd_clear_fast = lcd_clear_fast_p8;
+
+               if (lcd.pins.e == PIN_NOT_SET)
+                       lcd.pins.e = DEFAULT_LCD_PIN_E;
+               if (lcd.pins.rs == PIN_NOT_SET)
+                       lcd.pins.rs = DEFAULT_LCD_PIN_RS;
+               if (lcd.pins.rw == PIN_NOT_SET)
+                       lcd.pins.rw = DEFAULT_LCD_PIN_RW;
+       } else {
+               lcd_write_cmd = lcd_write_cmd_tilcd;
+               lcd_write_data = lcd_write_data_tilcd;
+               lcd_clear_fast = lcd_clear_fast_tilcd;
+       }
+
+       if (lcd.pins.bl == PIN_NOT_SET)
+               lcd.pins.bl = DEFAULT_LCD_PIN_BL;
+
+       if (lcd.pins.e == PIN_NOT_SET)
+               lcd.pins.e = PIN_NONE;
+       if (lcd.pins.rs == PIN_NOT_SET)
+               lcd.pins.rs = PIN_NONE;
+       if (lcd.pins.rw == PIN_NOT_SET)
+               lcd.pins.rw = PIN_NONE;
+       if (lcd.pins.bl == PIN_NOT_SET)
+               lcd.pins.bl = PIN_NONE;
+       if (lcd.pins.cl == PIN_NOT_SET)
+               lcd.pins.cl = PIN_NONE;
+       if (lcd.pins.da == PIN_NOT_SET)
+               lcd.pins.da = PIN_NONE;
+
+       if (lcd.charset == NOT_SET)
+               lcd.charset = DEFAULT_LCD_CHARSET;
+
+       if (lcd.charset == LCD_CHARSET_KS0074)
+               lcd_char_conv = lcd_char_conv_ks0074;
+       else
+               lcd_char_conv = NULL;
+
+       if (lcd.pins.bl != PIN_NONE)
+               init_scan_timer();
+
+       pin_to_bits(lcd.pins.e, lcd_bits[LCD_PORT_D][LCD_BIT_E],
+                   lcd_bits[LCD_PORT_C][LCD_BIT_E]);
+       pin_to_bits(lcd.pins.rs, lcd_bits[LCD_PORT_D][LCD_BIT_RS],
+                   lcd_bits[LCD_PORT_C][LCD_BIT_RS]);
+       pin_to_bits(lcd.pins.rw, lcd_bits[LCD_PORT_D][LCD_BIT_RW],
+                   lcd_bits[LCD_PORT_C][LCD_BIT_RW]);
+       pin_to_bits(lcd.pins.bl, lcd_bits[LCD_PORT_D][LCD_BIT_BL],
+                   lcd_bits[LCD_PORT_C][LCD_BIT_BL]);
+       pin_to_bits(lcd.pins.cl, lcd_bits[LCD_PORT_D][LCD_BIT_CL],
+                   lcd_bits[LCD_PORT_C][LCD_BIT_CL]);
+       pin_to_bits(lcd.pins.da, lcd_bits[LCD_PORT_D][LCD_BIT_DA],
+                   lcd_bits[LCD_PORT_C][LCD_BIT_DA]);
+
+       /*
+        * before this line, we must NOT send anything to the display.
+        * Since lcd_init_display() needs to write data, we have to
+        * enable mark the LCD initialized just before.
+        */
+       lcd.initialized = true;
+       lcd_init_display();
+
+       /* display a short message */
+#ifdef CONFIG_PANEL_CHANGE_MESSAGE
+#ifdef CONFIG_PANEL_BOOT_MESSAGE
+       panel_lcd_print("\x1b[Lc\x1b[Lb\x1b[L*" CONFIG_PANEL_BOOT_MESSAGE);
+#endif
+#else
+       panel_lcd_print("\x1b[Lc\x1b[Lb\x1b[L*Linux-" UTS_RELEASE "\nPanel-"
+                       PANEL_VERSION);
+#endif
+       lcd.addr.x = 0;
+       lcd.addr.y = 0;
+       /* clear the display on the next device opening */
+       lcd.must_clear = true;
+       lcd_gotoxy();
+}
+
+/*
+ * These are the file operation function for user access to /dev/keypad
+ */
+
+static ssize_t keypad_read(struct file *file,
+                          char __user *buf, size_t count, loff_t *ppos)
+{
+       unsigned i = *ppos;
+       char __user *tmp = buf;
+
+       if (keypad_buflen == 0) {
+               if (file->f_flags & O_NONBLOCK)
+                       return -EAGAIN;
+
+               if (wait_event_interruptible(keypad_read_wait,
+                                            keypad_buflen != 0))
+                       return -EINTR;
+       }
+
+       for (; count-- > 0 && (keypad_buflen > 0);
+            ++i, ++tmp, --keypad_buflen) {
+               put_user(keypad_buffer[keypad_start], tmp);
+               keypad_start = (keypad_start + 1) % KEYPAD_BUFFER;
+       }
+       *ppos = i;
+
+       return tmp - buf;
+}
+
+static int keypad_open(struct inode *inode, struct file *file)
+{
+       if (!atomic_dec_and_test(&keypad_available))
+               return -EBUSY;  /* open only once at a time */
+
+       if (file->f_mode & FMODE_WRITE) /* device is read-only */
+               return -EPERM;
+
+       keypad_buflen = 0;      /* flush the buffer on opening */
+       return 0;
+}
+
+static int keypad_release(struct inode *inode, struct file *file)
+{
+       atomic_inc(&keypad_available);
+       return 0;
+}
+
+static const struct file_operations keypad_fops = {
+       .read    = keypad_read,         /* read */
+       .open    = keypad_open,         /* open */
+       .release = keypad_release,      /* close */
+       .llseek  = default_llseek,
+};
+
+static struct miscdevice keypad_dev = {
+       .minor  = KEYPAD_MINOR,
+       .name   = "keypad",
+       .fops   = &keypad_fops,
+};
+
+static void keypad_send_key(const char *string, int max_len)
+{
+       /* send the key to the device only if a process is attached to it. */
+       if (!atomic_read(&keypad_available)) {
+               while (max_len-- && keypad_buflen < KEYPAD_BUFFER && *string) {
+                       keypad_buffer[(keypad_start + keypad_buflen++) %
+                                     KEYPAD_BUFFER] = *string++;
+               }
+               wake_up_interruptible(&keypad_read_wait);
+       }
+}
+
+/* this function scans all the bits involving at least one logical signal,
+ * and puts the results in the bitfield "phys_read" (one bit per established
+ * contact), and sets "phys_read_prev" to "phys_read".
+ *
+ * Note: to debounce input signals, we will only consider as switched a signal
+ * which is stable across 2 measures. Signals which are different between two
+ * reads will be kept as they previously were in their logical form (phys_prev).
+ * A signal which has just switched will have a 1 in
+ * (phys_read ^ phys_read_prev).
+ */
+static void phys_scan_contacts(void)
+{
+       int bit, bitval;
+       char oldval;
+       char bitmask;
+       char gndmask;
+
+       phys_prev = phys_curr;
+       phys_read_prev = phys_read;
+       phys_read = 0;          /* flush all signals */
+
+       /* keep track of old value, with all outputs disabled */
+       oldval = r_dtr(pprt) | scan_mask_o;
+       /* activate all keyboard outputs (active low) */
+       w_dtr(pprt, oldval & ~scan_mask_o);
+
+       /* will have a 1 for each bit set to gnd */
+       bitmask = PNL_PINPUT(r_str(pprt)) & scan_mask_i;
+       /* disable all matrix signals */
+       w_dtr(pprt, oldval);
+
+       /* now that all outputs are cleared, the only active input bits are
+        * directly connected to the ground
+        */
+
+       /* 1 for each grounded input */
+       gndmask = PNL_PINPUT(r_str(pprt)) & scan_mask_i;
+
+       /* grounded inputs are signals 40-44 */
+       phys_read |= (__u64)gndmask << 40;
+
+       if (bitmask != gndmask) {
+               /*
+                * since clearing the outputs changed some inputs, we know
+                * that some input signals are currently tied to some outputs.
+                * So we'll scan them.
+                */
+               for (bit = 0; bit < 8; bit++) {
+                       bitval = BIT(bit);
+
+                       if (!(scan_mask_o & bitval))    /* skip unused bits */
+                               continue;
+
+                       w_dtr(pprt, oldval & ~bitval);  /* enable this output */
+                       bitmask = PNL_PINPUT(r_str(pprt)) & ~gndmask;
+                       phys_read |= (__u64)bitmask << (5 * bit);
+               }
+               w_dtr(pprt, oldval);    /* disable all outputs */
+       }
+       /*
+        * this is easy: use old bits when they are flapping,
+        * use new ones when stable
+        */
+       phys_curr = (phys_prev & (phys_read ^ phys_read_prev)) |
+                   (phys_read & ~(phys_read ^ phys_read_prev));
+}
+
+static inline int input_state_high(struct logical_input *input)
+{
+#if 0
+       /* FIXME:
+        * this is an invalid test. It tries to catch
+        * transitions from single-key to multiple-key, but
+        * doesn't take into account the contacts polarity.
+        * The only solution to the problem is to parse keys
+        * from the most complex to the simplest combinations,
+        * and mark them as 'caught' once a combination
+        * matches, then unmatch it for all other ones.
+        */
+
+       /* try to catch dangerous transitions cases :
+        * someone adds a bit, so this signal was a false
+        * positive resulting from a transition. We should
+        * invalidate the signal immediately and not call the
+        * release function.
+        * eg: 0 -(press A)-> A -(press B)-> AB : don't match A's release.
+        */
+       if (((phys_prev & input->mask) == input->value) &&
+           ((phys_curr & input->mask) >  input->value)) {
+               input->state = INPUT_ST_LOW; /* invalidate */
+               return 1;
+       }
+#endif
+
+       if ((phys_curr & input->mask) == input->value) {
+               if ((input->type == INPUT_TYPE_STD) &&
+                   (input->high_timer == 0)) {
+                       input->high_timer++;
+                       if (input->u.std.press_fct)
+                               input->u.std.press_fct(input->u.std.press_data);
+               } else if (input->type == INPUT_TYPE_KBD) {
+                       /* will turn on the light */
+                       keypressed = 1;
+
+                       if (input->high_timer == 0) {
+                               char *press_str = input->u.kbd.press_str;
+
+                               if (press_str[0]) {
+                                       int s = sizeof(input->u.kbd.press_str);
+
+                                       keypad_send_key(press_str, s);
+                               }
+                       }
+
+                       if (input->u.kbd.repeat_str[0]) {
+                               char *repeat_str = input->u.kbd.repeat_str;
+
+                               if (input->high_timer >= KEYPAD_REP_START) {
+                                       int s = sizeof(input->u.kbd.repeat_str);
+
+                                       input->high_timer -= KEYPAD_REP_DELAY;
+                                       keypad_send_key(repeat_str, s);
+                               }
+                               /* we will need to come back here soon */
+                               inputs_stable = 0;
+                       }
+
+                       if (input->high_timer < 255)
+                               input->high_timer++;
+               }
+               return 1;
+       }
+
+       /* else signal falling down. Let's fall through. */
+       input->state = INPUT_ST_FALLING;
+       input->fall_timer = 0;
+
+       return 0;
+}
+
+static inline void input_state_falling(struct logical_input *input)
+{
+#if 0
+       /* FIXME !!! same comment as in input_state_high */
+       if (((phys_prev & input->mask) == input->value) &&
+           ((phys_curr & input->mask) >  input->value)) {
+               input->state = INPUT_ST_LOW;    /* invalidate */
+               return;
+       }
+#endif
+
+       if ((phys_curr & input->mask) == input->value) {
+               if (input->type == INPUT_TYPE_KBD) {
+                       /* will turn on the light */
+                       keypressed = 1;
+
+                       if (input->u.kbd.repeat_str[0]) {
+                               char *repeat_str = input->u.kbd.repeat_str;
+
+                               if (input->high_timer >= KEYPAD_REP_START) {
+                                       int s = sizeof(input->u.kbd.repeat_str);
+
+                                       input->high_timer -= KEYPAD_REP_DELAY;
+                                       keypad_send_key(repeat_str, s);
+                               }
+                               /* we will need to come back here soon */
+                               inputs_stable = 0;
+                       }
+
+                       if (input->high_timer < 255)
+                               input->high_timer++;
+               }
+               input->state = INPUT_ST_HIGH;
+       } else if (input->fall_timer >= input->fall_time) {
+               /* call release event */
+               if (input->type == INPUT_TYPE_STD) {
+                       void (*release_fct)(int) = input->u.std.release_fct;
+
+                       if (release_fct)
+                               release_fct(input->u.std.release_data);
+               } else if (input->type == INPUT_TYPE_KBD) {
+                       char *release_str = input->u.kbd.release_str;
+
+                       if (release_str[0]) {
+                               int s = sizeof(input->u.kbd.release_str);
+
+                               keypad_send_key(release_str, s);
+                       }
+               }
+
+               input->state = INPUT_ST_LOW;
+       } else {
+               input->fall_timer++;
+               inputs_stable = 0;
+       }
+}
+
+static void panel_process_inputs(void)
+{
+       struct list_head *item;
+       struct logical_input *input;
+
+       keypressed = 0;
+       inputs_stable = 1;
+       list_for_each(item, &logical_inputs) {
+               input = list_entry(item, struct logical_input, list);
+
+               switch (input->state) {
+               case INPUT_ST_LOW:
+                       if ((phys_curr & input->mask) != input->value)
+                               break;
+                       /* if all needed ones were already set previously,
+                        * this means that this logical signal has been
+                        * activated by the releasing of another combined
+                        * signal, so we don't want to match.
+                        * eg: AB -(release B)-> A -(release A)-> 0 :
+                        *     don't match A.
+                        */
+                       if ((phys_prev & input->mask) == input->value)
+                               break;
+                       input->rise_timer = 0;
+                       input->state = INPUT_ST_RISING;
+                       /* no break here, fall through */
+               case INPUT_ST_RISING:
+                       if ((phys_curr & input->mask) != input->value) {
+                               input->state = INPUT_ST_LOW;
+                               break;
+                       }
+                       if (input->rise_timer < input->rise_time) {
+                               inputs_stable = 0;
+                               input->rise_timer++;
+                               break;
+                       }
+                       input->high_timer = 0;
+                       input->state = INPUT_ST_HIGH;
+                       /* no break here, fall through */
+               case INPUT_ST_HIGH:
+                       if (input_state_high(input))
+                               break;
+                       /* no break here, fall through */
+               case INPUT_ST_FALLING:
+                       input_state_falling(input);
+               }
+       }
+}
+
+static void panel_scan_timer(void)
+{
+       if (keypad.enabled && keypad_initialized) {
+               if (spin_trylock_irq(&pprt_lock)) {
+                       phys_scan_contacts();
+
+                       /* no need for the parport anymore */
+                       spin_unlock_irq(&pprt_lock);
+               }
+
+               if (!inputs_stable || phys_curr != phys_prev)
+                       panel_process_inputs();
+       }
+
+       if (lcd.enabled && lcd.initialized) {
+               if (keypressed) {
+                       if (lcd.light_tempo == 0 &&
+                           ((lcd.flags & LCD_FLAG_L) == 0))
+                               lcd_backlight(1);
+                       lcd.light_tempo = FLASH_LIGHT_TEMPO;
+               } else if (lcd.light_tempo > 0) {
+                       lcd.light_tempo--;
+                       if (lcd.light_tempo == 0 &&
+                           ((lcd.flags & LCD_FLAG_L) == 0))
+                               lcd_backlight(0);
+               }
+       }
+
+       mod_timer(&scan_timer, jiffies + INPUT_POLL_TIME);
+}
+
+static void init_scan_timer(void)
+{
+       if (scan_timer.function)
+               return;         /* already started */
+
+       setup_timer(&scan_timer, (void *)&panel_scan_timer, 0);
+       scan_timer.expires = jiffies + INPUT_POLL_TIME;
+       add_timer(&scan_timer);
+}
+
+/* converts a name of the form "({BbAaPpSsEe}{01234567-})*" to a series of bits.
+ * if <omask> or <imask> are non-null, they will be or'ed with the bits
+ * corresponding to out and in bits respectively.
+ * returns 1 if ok, 0 if error (in which case, nothing is written).
+ */
+static u8 input_name2mask(const char *name, __u64 *mask, __u64 *value,
+                         u8 *imask, u8 *omask)
+{
+       const char sigtab[] = "EeSsPpAaBb";
+       u8 im, om;
+       __u64 m, v;
+
+       om = 0;
+       im = 0;
+       m = 0ULL;
+       v = 0ULL;
+       while (*name) {
+               int in, out, bit, neg;
+               const char *idx;
+
+               idx = strchr(sigtab, *name);
+               if (!idx)
+                       return 0;       /* input name not found */
+
+               in = idx - sigtab;
+               neg = (in & 1); /* odd (lower) names are negated */
+               in >>= 1;
+               im |= BIT(in);
+
+               name++;
+               if (*name >= '0' && *name <= '7') {
+                       out = *name - '0';
+                       om |= BIT(out);
+               } else if (*name == '-') {
+                       out = 8;
+               } else {
+                       return 0;       /* unknown bit name */
+               }
+
+               bit = (out * 5) + in;
+
+               m |= 1ULL << bit;
+               if (!neg)
+                       v |= 1ULL << bit;
+               name++;
+       }
+       *mask = m;
+       *value = v;
+       if (imask)
+               *imask |= im;
+       if (omask)
+               *omask |= om;
+       return 1;
+}
+
+/* tries to bind a key to the signal name <name>. The key will send the
+ * strings <press>, <repeat>, <release> for these respective events.
+ * Returns the pointer to the new key if ok, NULL if the key could not be bound.
+ */
+static struct logical_input *panel_bind_key(const char *name, const char *press,
+                                           const char *repeat,
+                                           const char *release)
+{
+       struct logical_input *key;
+
+       key = kzalloc(sizeof(*key), GFP_KERNEL);
+       if (!key)
+               return NULL;
+
+       if (!input_name2mask(name, &key->mask, &key->value, &scan_mask_i,
+                            &scan_mask_o)) {
+               kfree(key);
+               return NULL;
+       }
+
+       key->type = INPUT_TYPE_KBD;
+       key->state = INPUT_ST_LOW;
+       key->rise_time = 1;
+       key->fall_time = 1;
+
+       strncpy(key->u.kbd.press_str, press, sizeof(key->u.kbd.press_str));
+       strncpy(key->u.kbd.repeat_str, repeat, sizeof(key->u.kbd.repeat_str));
+       strncpy(key->u.kbd.release_str, release,
+               sizeof(key->u.kbd.release_str));
+       list_add(&key->list, &logical_inputs);
+       return key;
+}
+
+#if 0
+/* tries to bind a callback function to the signal name <name>. The function
+ * <press_fct> will be called with the <press_data> arg when the signal is
+ * activated, and so on for <release_fct>/<release_data>
+ * Returns the pointer to the new signal if ok, NULL if the signal could not
+ * be bound.
+ */
+static struct logical_input *panel_bind_callback(char *name,
+                                                void (*press_fct)(int),
+                                                int press_data,
+                                                void (*release_fct)(int),
+                                                int release_data)
+{
+       struct logical_input *callback;
+
+       callback = kmalloc(sizeof(*callback), GFP_KERNEL);
+       if (!callback)
+               return NULL;
+
+       memset(callback, 0, sizeof(struct logical_input));
+       if (!input_name2mask(name, &callback->mask, &callback->value,
+                            &scan_mask_i, &scan_mask_o))
+               return NULL;
+
+       callback->type = INPUT_TYPE_STD;
+       callback->state = INPUT_ST_LOW;
+       callback->rise_time = 1;
+       callback->fall_time = 1;
+       callback->u.std.press_fct = press_fct;
+       callback->u.std.press_data = press_data;
+       callback->u.std.release_fct = release_fct;
+       callback->u.std.release_data = release_data;
+       list_add(&callback->list, &logical_inputs);
+       return callback;
+}
+#endif
+
+static void keypad_init(void)
+{
+       int keynum;
+
+       init_waitqueue_head(&keypad_read_wait);
+       keypad_buflen = 0;      /* flushes any eventual noisy keystroke */
+
+       /* Let's create all known keys */
+
+       for (keynum = 0; keypad_profile[keynum][0][0]; keynum++) {
+               panel_bind_key(keypad_profile[keynum][0],
+                              keypad_profile[keynum][1],
+                              keypad_profile[keynum][2],
+                              keypad_profile[keynum][3]);
+       }
+
+       init_scan_timer();
+       keypad_initialized = 1;
+}
+
+/**************************************************/
+/* device initialization                          */
+/**************************************************/
+
+static int panel_notify_sys(struct notifier_block *this, unsigned long code,
+                           void *unused)
+{
+       if (lcd.enabled && lcd.initialized) {
+               switch (code) {
+               case SYS_DOWN:
+                       panel_lcd_print
+                           ("\x0cReloading\nSystem...\x1b[Lc\x1b[Lb\x1b[L+");
+                       break;
+               case SYS_HALT:
+                       panel_lcd_print
+                           ("\x0cSystem Halted.\x1b[Lc\x1b[Lb\x1b[L+");
+                       break;
+               case SYS_POWER_OFF:
+                       panel_lcd_print("\x0cPower off.\x1b[Lc\x1b[Lb\x1b[L+");
+                       break;
+               default:
+                       break;
+               }
+       }
+       return NOTIFY_DONE;
+}
+
+static struct notifier_block panel_notifier = {
+       panel_notify_sys,
+       NULL,
+       0
+};
+
+static void panel_attach(struct parport *port)
+{
+       struct pardev_cb panel_cb;
+
+       if (port->number != parport)
+               return;
+
+       if (pprt) {
+               pr_err("%s: port->number=%d parport=%d, already registered!\n",
+                      __func__, port->number, parport);
+               return;
+       }
+
+       memset(&panel_cb, 0, sizeof(panel_cb));
+       panel_cb.private = &pprt;
+       /* panel_cb.flags = 0 should be PARPORT_DEV_EXCL? */
+
+       pprt = parport_register_dev_model(port, "panel", &panel_cb, 0);
+       if (!pprt) {
+               pr_err("%s: port->number=%d parport=%d, parport_register_device() failed\n",
+                      __func__, port->number, parport);
+               return;
+       }
+
+       if (parport_claim(pprt)) {
+               pr_err("could not claim access to parport%d. Aborting.\n",
+                      parport);
+               goto err_unreg_device;
+       }
+
+       /* must init LCD first, just in case an IRQ from the keypad is
+        * generated at keypad init
+        */
+       if (lcd.enabled) {
+               lcd_init();
+               if (misc_register(&lcd_dev))
+                       goto err_unreg_device;
+       }
+
+       if (keypad.enabled) {
+               keypad_init();
+               if (misc_register(&keypad_dev))
+                       goto err_lcd_unreg;
+       }
+       register_reboot_notifier(&panel_notifier);
+       return;
+
+err_lcd_unreg:
+       if (lcd.enabled)
+               misc_deregister(&lcd_dev);
+err_unreg_device:
+       parport_unregister_device(pprt);
+       pprt = NULL;
+}
+
+static void panel_detach(struct parport *port)
+{
+       if (port->number != parport)
+               return;
+
+       if (!pprt) {
+               pr_err("%s: port->number=%d parport=%d, nothing to unregister.\n",
+                      __func__, port->number, parport);
+               return;
+       }
+       if (scan_timer.function)
+               del_timer_sync(&scan_timer);
+
+       if (pprt) {
+               if (keypad.enabled) {
+                       misc_deregister(&keypad_dev);
+                       keypad_initialized = 0;
+               }
+
+               if (lcd.enabled) {
+                       panel_lcd_print("\x0cLCD driver " PANEL_VERSION
+                                       "\nunloaded.\x1b[Lc\x1b[Lb\x1b[L-");
+                       misc_deregister(&lcd_dev);
+                       lcd.initialized = false;
+               }
+
+               /* TODO: free all input signals */
+               parport_release(pprt);
+               parport_unregister_device(pprt);
+               pprt = NULL;
+               unregister_reboot_notifier(&panel_notifier);
+       }
+}
+
+static struct parport_driver panel_driver = {
+       .name = "panel",
+       .match_port = panel_attach,
+       .detach = panel_detach,
+       .devmodel = true,
+};
+
+/* init function */
+static int __init panel_init_module(void)
+{
+       int selected_keypad_type = NOT_SET, err;
+
+       /* take care of an eventual profile */
+       switch (profile) {
+       case PANEL_PROFILE_CUSTOM:
+               /* custom profile */
+               selected_keypad_type = DEFAULT_KEYPAD_TYPE;
+               selected_lcd_type = DEFAULT_LCD_TYPE;
+               break;
+       case PANEL_PROFILE_OLD:
+               /* 8 bits, 2*16, old keypad */
+               selected_keypad_type = KEYPAD_TYPE_OLD;
+               selected_lcd_type = LCD_TYPE_OLD;
+
+               /* TODO: This two are a little hacky, sort it out later */
+               if (lcd_width == NOT_SET)
+                       lcd_width = 16;
+               if (lcd_hwidth == NOT_SET)
+                       lcd_hwidth = 16;
+               break;
+       case PANEL_PROFILE_NEW:
+               /* serial, 2*16, new keypad */
+               selected_keypad_type = KEYPAD_TYPE_NEW;
+               selected_lcd_type = LCD_TYPE_KS0074;
+               break;
+       case PANEL_PROFILE_HANTRONIX:
+               /* 8 bits, 2*16 hantronix-like, no keypad */
+               selected_keypad_type = KEYPAD_TYPE_NONE;
+               selected_lcd_type = LCD_TYPE_HANTRONIX;
+               break;
+       case PANEL_PROFILE_NEXCOM:
+               /* generic 8 bits, 2*16, nexcom keypad, eg. Nexcom. */
+               selected_keypad_type = KEYPAD_TYPE_NEXCOM;
+               selected_lcd_type = LCD_TYPE_NEXCOM;
+               break;
+       case PANEL_PROFILE_LARGE:
+               /* 8 bits, 2*40, old keypad */
+               selected_keypad_type = KEYPAD_TYPE_OLD;
+               selected_lcd_type = LCD_TYPE_OLD;
+               break;
+       }
+
+       /*
+        * Overwrite selection with module param values (both keypad and lcd),
+        * where the deprecated params have lower prio.
+        */
+       if (keypad_enabled != NOT_SET)
+               selected_keypad_type = keypad_enabled;
+       if (keypad_type != NOT_SET)
+               selected_keypad_type = keypad_type;
+
+       keypad.enabled = (selected_keypad_type > 0);
+
+       if (lcd_enabled != NOT_SET)
+               selected_lcd_type = lcd_enabled;
+       if (lcd_type != NOT_SET)
+               selected_lcd_type = lcd_type;
+
+       lcd.enabled = (selected_lcd_type > 0);
+
+       if (lcd.enabled) {
+               /*
+                * Init lcd struct with load-time values to preserve exact
+                * current functionality (at least for now).
+                */
+               lcd.height = lcd_height;
+               lcd.width = lcd_width;
+               lcd.bwidth = lcd_bwidth;
+               lcd.hwidth = lcd_hwidth;
+               lcd.charset = lcd_charset;
+               lcd.proto = lcd_proto;
+               lcd.pins.e = lcd_e_pin;
+               lcd.pins.rs = lcd_rs_pin;
+               lcd.pins.rw = lcd_rw_pin;
+               lcd.pins.cl = lcd_cl_pin;
+               lcd.pins.da = lcd_da_pin;
+               lcd.pins.bl = lcd_bl_pin;
+
+               /* Leave it for now, just in case */
+               lcd.esc_seq.len = -1;
+       }
+
+       switch (selected_keypad_type) {
+       case KEYPAD_TYPE_OLD:
+               keypad_profile = old_keypad_profile;
+               break;
+       case KEYPAD_TYPE_NEW:
+               keypad_profile = new_keypad_profile;
+               break;
+       case KEYPAD_TYPE_NEXCOM:
+               keypad_profile = nexcom_keypad_profile;
+               break;
+       default:
+               keypad_profile = NULL;
+               break;
+       }
+
+       if (!lcd.enabled && !keypad.enabled) {
+               /* no device enabled, let's exit */
+               pr_err("driver version " PANEL_VERSION " disabled.\n");
+               return -ENODEV;
+       }
+
+       err = parport_register_driver(&panel_driver);
+       if (err) {
+               pr_err("could not register with parport. Aborting.\n");
+               return err;
+       }
+
+       if (pprt)
+               pr_info("driver version " PANEL_VERSION
+                       " registered on parport%d (io=0x%lx).\n", parport,
+                       pprt->port->base);
+       else
+               pr_info("driver version " PANEL_VERSION
+                       " not yet registered\n");
+       return 0;
+}
+
+static void __exit panel_cleanup_module(void)
+{
+       parport_unregister_driver(&panel_driver);
+}
+
+module_init(panel_init_module);
+module_exit(panel_cleanup_module);
+MODULE_AUTHOR("Willy Tarreau");
+MODULE_LICENSE("GPL");
+
+/*
+ * Local variables:
+ *  c-indent-level: 4
+ *  tab-width: 8
+ * End:
+ */
index e80268ae8c9d33d875b52dff9f8811323924b189..5f9a97a77393162a8c2e371bb2722c4bbec6eb23 100644 (file)
@@ -30,8 +30,6 @@ source "drivers/staging/wlan-ng/Kconfig"
 
 source "drivers/staging/comedi/Kconfig"
 
-source "drivers/staging/panel/Kconfig"
-
 source "drivers/staging/rtl8192u/Kconfig"
 
 source "drivers/staging/rtl8192e/Kconfig"
index ba160f1ec02d2e00fab01cb2cf63da3f4c12608e..dbab17e9d45c308a681ab261f7ef55c46723b37d 100644 (file)
@@ -7,7 +7,6 @@ obj-y                           += media/
 obj-$(CONFIG_SLICOSS)          += slicoss/
 obj-$(CONFIG_PRISM2_USB)       += wlan-ng/
 obj-$(CONFIG_COMEDI)           += comedi/
-obj-$(CONFIG_PANEL)            += panel/
 obj-$(CONFIG_RTL8192U)         += rtl8192u/
 obj-$(CONFIG_RTL8192E)         += rtl8192e/
 obj-$(CONFIG_R8712U)           += rtl8712/
diff --git a/drivers/staging/panel/Kconfig b/drivers/staging/panel/Kconfig
deleted file mode 100644 (file)
index 3defa01..0000000
+++ /dev/null
@@ -1,278 +0,0 @@
-config PANEL
-       tristate "Parallel port LCD/Keypad Panel support"
-       depends on PARPORT
-       ---help---
-         Say Y here if you have an HD44780 or KS-0074 LCD connected to your
-         parallel port. This driver also features 4 and 6-key keypads. The LCD
-         is accessible through the /dev/lcd char device (10, 156), and the
-         keypad through /dev/keypad (10, 185). Both require misc device to be
-         enabled. This code can either be compiled as a module, or linked into
-         the kernel and started at boot. If you don't understand what all this
-         is about, say N.
-
-config PANEL_PARPORT
-       int "Default parallel port number (0=LPT1)"
-       depends on PANEL
-       range 0 255
-       default "0"
-       ---help---
-         This is the index of the parallel port the panel is connected to. One
-         driver instance only supports one parallel port, so if your keypad
-         and LCD are connected to two separate ports, you have to start two
-         modules with different arguments. Numbering starts with '0' for LPT1,
-         and so on.
-
-config PANEL_PROFILE
-       int "Default panel profile (0-5, 0=custom)"
-       depends on PANEL
-       range 0 5
-       default "5"
-       ---help---
-         To ease configuration, the driver supports different configuration
-         profiles for past and recent wirings. These profiles can also be
-         used to define an approximative configuration, completed by a few
-         other options. Here are the profiles :
-
-           0 = custom (see further)
-           1 = 2x16 parallel LCD, old keypad
-           2 = 2x16 serial LCD (KS-0074), new keypad
-           3 = 2x16 parallel LCD (Hantronix), no keypad
-           4 = 2x16 parallel LCD (Nexcom NSA1045) with Nexcom's keypad
-           5 = 2x40 parallel LCD (old one), with old keypad
-
-         Custom configurations allow you to define how your display is
-         wired to the parallel port, and how it works. This is only intended
-         for experts.
-
-config PANEL_KEYPAD
-       depends on PANEL && PANEL_PROFILE="0"
-       int "Keypad type (0=none, 1=old 6 keys, 2=new 6 keys, 3=Nexcom 4 keys)"
-       range 0 3
-       default 0
-       ---help---
-         This enables and configures a keypad connected to the parallel port.
-         The keys will be read from character device 10,185. Valid values are :
-
-           0 : do not enable this driver
-           1 : old 6 keys keypad
-           2 : new 6 keys keypad, as used on the server at www.ant-computing.com
-           3 : Nexcom NSA1045's 4 keys keypad
-
-         New profiles can be described in the driver source. The driver also
-         supports simultaneous keys pressed when the keypad supports them.
-
-config PANEL_LCD
-       depends on PANEL && PANEL_PROFILE="0"
-       int "LCD type (0=none, 1=custom, 2=old //, 3=ks0074, 4=hantronix, 5=Nexcom)"
-       range 0 5
-       default 0
-       ---help---
-          This enables and configures an LCD connected to the parallel port.
-          The driver includes an interpreter for escape codes starting with
-          '\e[L' which are specific to the LCD, and a few ANSI codes. The
-          driver will be registered as character device 10,156, usually
-          under the name '/dev/lcd'. There are a total of 6 supported types :
-
-            0 : do not enable the driver
-            1 : custom configuration and wiring (see further)
-            2 : 2x16 & 2x40 parallel LCD (old wiring)
-            3 : 2x16 serial LCD (KS-0074 based)
-            4 : 2x16 parallel LCD (Hantronix wiring)
-            5 : 2x16 parallel LCD (Nexcom wiring)
-
-          When type '1' is specified, other options will appear to configure
-          more precise aspects (wiring, dimensions, protocol, ...). Please note
-          that those values changed from the 2.4 driver for better consistency.
-
-config PANEL_LCD_HEIGHT
-       depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1"
-       int "Number of lines on the LCD (1-2)"
-       range 1 2
-       default 2
-       ---help---
-         This is the number of visible character lines on the LCD in custom profile.
-         It can either be 1 or 2.
-
-config PANEL_LCD_WIDTH
-       depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1"
-       int "Number of characters per line on the LCD (1-40)"
-       range 1 40
-       default 40
-       ---help---
-         This is the number of characters per line on the LCD in custom profile.
-         Common values are 16,20,24,40.
-
-config PANEL_LCD_BWIDTH
-       depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1"
-       int "Internal LCD line width (1-40, 40 by default)"
-       range 1 40
-       default 40
-       ---help---
-         Most LCDs use a standard controller which supports hardware lines of 40
-         characters, although sometimes only 16, 20 or 24 of them are really wired
-         to the terminal. This results in some non-visible but addressable characters,
-         and is the case for most parallel LCDs. Other LCDs, and some serial ones,
-         however, use the same line width internally as what is visible. The KS0074
-         for example, uses 16 characters per line for 16 visible characters per line.
-
-         This option lets you configure the value used by your LCD in 'custom' profile.
-         If you don't know, put '40' here.
-
-config PANEL_LCD_HWIDTH
-       depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1"
-       int "Hardware LCD line width (1-64, 64 by default)"
-       range 1 64
-       default 64
-       ---help---
-         Most LCDs use a single address bit to differentiate line 0 and line 1. Since
-         some of them need to be able to address 40 chars with the lower bits, they
-         often use the immediately superior power of 2, which is 64, to address the
-         next line.
-
-         If you don't know what your LCD uses, in doubt let 16 here for a 2x16, and
-         64 here for a 2x40.
-
-config PANEL_LCD_CHARSET
-       depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1"
-       int "LCD character set (0=normal, 1=KS0074)"
-       range 0 1
-       default 0
-       ---help---
-         Some controllers such as the KS0074 use a somewhat strange character set
-         where many symbols are at unusual places. The driver knows how to map
-         'standard' ASCII characters to the character sets used by these controllers.
-         Valid values are :
-
-            0 : normal (untranslated) character set
-            1 : KS0074 character set
-
-         If you don't know, use the normal one (0).
-
-config PANEL_LCD_PROTO
-       depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1"
-       int "LCD communication mode (0=parallel 8 bits, 1=serial)"
-       range 0 1
-       default 0
-       ---help---
-         This driver now supports any serial or parallel LCD wired to a parallel
-         port. But before assigning signals, the driver needs to know if it will
-         be driving a serial LCD or a parallel one. Serial LCDs only use 2 wires
-         (SDA/SCL), while parallel ones use 2 or 3 wires for the control signals
-         (E, RS, sometimes RW), and 4 or 8 for the data. Use 0 here for a 8 bits
-         parallel LCD, and 1 for a serial LCD.
-
-config PANEL_LCD_PIN_E
-       depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO="0"
-        int "Parallel port pin number & polarity connected to the LCD E signal (-17...17) "
-       range -17 17
-       default 14
-       ---help---
-         This describes the number of the parallel port pin to which the LCD 'E'
-         signal has been connected. It can be :
-
-                 0 : no connection (eg: connected to ground)
-             1..17 : directly connected to any of these pins on the DB25 plug
-           -1..-17 : connected to the same pin through an inverter (eg: transistor).
-
-         Default for the 'E' pin in custom profile is '14' (AUTOFEED).
-
-config PANEL_LCD_PIN_RS
-       depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO="0"
-        int "Parallel port pin number & polarity connected to the LCD RS signal (-17...17) "
-       range -17 17
-       default 17
-       ---help---
-         This describes the number of the parallel port pin to which the LCD 'RS'
-         signal has been connected. It can be :
-
-                 0 : no connection (eg: connected to ground)
-             1..17 : directly connected to any of these pins on the DB25 plug
-           -1..-17 : connected to the same pin through an inverter (eg: transistor).
-
-         Default for the 'RS' pin in custom profile is '17' (SELECT IN).
-
-config PANEL_LCD_PIN_RW
-       depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO="0"
-        int "Parallel port pin number & polarity connected to the LCD RW signal (-17...17) "
-       range -17 17
-       default 16
-       ---help---
-         This describes the number of the parallel port pin to which the LCD 'RW'
-         signal has been connected. It can be :
-
-                 0 : no connection (eg: connected to ground)
-             1..17 : directly connected to any of these pins on the DB25 plug
-           -1..-17 : connected to the same pin through an inverter (eg: transistor).
-
-         Default for the 'RW' pin in custom profile is '16' (INIT).
-
-config PANEL_LCD_PIN_SCL
-       depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO!="0"
-        int "Parallel port pin number & polarity connected to the LCD SCL signal (-17...17) "
-       range -17 17
-       default 1
-       ---help---
-         This describes the number of the parallel port pin to which the serial
-         LCD 'SCL' signal has been connected. It can be :
-
-                 0 : no connection (eg: connected to ground)
-             1..17 : directly connected to any of these pins on the DB25 plug
-           -1..-17 : connected to the same pin through an inverter (eg: transistor).
-
-         Default for the 'SCL' pin in custom profile is '1' (STROBE).
-
-config PANEL_LCD_PIN_SDA
-       depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1" && PANEL_LCD_PROTO!="0"
-        int "Parallel port pin number & polarity connected to the LCD SDA signal (-17...17) "
-       range -17 17
-       default 2
-       ---help---
-         This describes the number of the parallel port pin to which the serial
-         LCD 'SDA' signal has been connected. It can be :
-
-                 0 : no connection (eg: connected to ground)
-             1..17 : directly connected to any of these pins on the DB25 plug
-           -1..-17 : connected to the same pin through an inverter (eg: transistor).
-
-         Default for the 'SDA' pin in custom profile is '2' (D0).
-
-config PANEL_LCD_PIN_BL
-       depends on PANEL && PANEL_PROFILE="0" && PANEL_LCD="1"
-        int "Parallel port pin number & polarity connected to the LCD backlight signal (-17...17) "
-       range -17 17
-       default 0
-       ---help---
-         This describes the number of the parallel port pin to which the LCD 'BL' signal
-          has been connected. It can be :
-
-                 0 : no connection (eg: connected to ground)
-             1..17 : directly connected to any of these pins on the DB25 plug
-           -1..-17 : connected to the same pin through an inverter (eg: transistor).
-
-         Default for the 'BL' pin in custom profile is '0' (uncontrolled).
-
-config PANEL_CHANGE_MESSAGE
-       depends on PANEL
-       bool "Change LCD initialization message ?"
-       default "n"
-       ---help---
-         This allows you to replace the boot message indicating the kernel version
-         and the driver version with a custom message. This is useful on appliances
-         where a simple 'Starting system' message can be enough to stop a customer
-         from worrying.
-
-         If you say 'Y' here, you'll be able to choose a message yourself. Otherwise,
-         say 'N' and keep the default message with the version.
-
-config PANEL_BOOT_MESSAGE
-       depends on PANEL && PANEL_CHANGE_MESSAGE="y"
-       string "New initialization message"
-       default ""
-       ---help---
-         This allows you to replace the boot message indicating the kernel version
-         and the driver version with a custom message. This is useful on appliances
-         where a simple 'Starting system' message can be enough to stop a customer
-         from worrying.
-
-         An empty message will only clear the display at driver init time. Any other
-         printf()-formatted message is valid with newline and escape codes.
diff --git a/drivers/staging/panel/Makefile b/drivers/staging/panel/Makefile
deleted file mode 100644 (file)
index 747c238..0000000
+++ /dev/null
@@ -1 +0,0 @@
-obj-$(CONFIG_PANEL)            += panel.o
diff --git a/drivers/staging/panel/TODO b/drivers/staging/panel/TODO
deleted file mode 100644 (file)
index 3a6405a..0000000
+++ /dev/null
@@ -1,8 +0,0 @@
-TODO:
-       - checkpatch.pl cleanups
-       - review major/minor usages
-       - review userspace api
-       - see if all of this could be easier done in userspace instead.
-
-Please send patches to Greg Kroah-Hartman <greg@kroah.com> and
-Willy Tarreau <willy@haproxy.com>
diff --git a/drivers/staging/panel/lcd-panel-cgram.txt b/drivers/staging/panel/lcd-panel-cgram.txt
deleted file mode 100644 (file)
index 7f82c90..0000000
+++ /dev/null
@@ -1,24 +0,0 @@
-Some LCDs allow you to define up to 8 characters, mapped to ASCII
-characters 0 to 7. The escape code to define a new character is
-'\e[LG' followed by one digit from 0 to 7, representing the character
-number, and up to 8 couples of hex digits terminated by a semi-colon
-(';'). Each couple of digits represents a line, with 1-bits for each
-illuminated pixel with LSB on the right. Lines are numbered from the
-top of the character to the bottom. On a 5x7 matrix, only the 5 lower
-bits of the 7 first bytes are used for each character. If the string
-is incomplete, only complete lines will be redefined. Here are some
-examples :
-
-  printf "\e[LG0010101050D1F0C04;"  => 0 = [enter]
-  printf "\e[LG1040E1F0000000000;"  => 1 = [up]
-  printf "\e[LG2000000001F0E0400;"  => 2 = [down]
-  printf "\e[LG3040E1F001F0E0400;"  => 3 = [up-down]
-  printf "\e[LG40002060E1E0E0602;"  => 4 = [left]
-  printf "\e[LG500080C0E0F0E0C08;"  => 5 = [right]
-  printf "\e[LG60016051516141400;"  => 6 = "IP"
-
-  printf "\e[LG00103071F1F070301;"  => big speaker
-  printf "\e[LG00002061E1E060200;"  => small speaker
-
-Willy
-
diff --git a/drivers/staging/panel/panel.c b/drivers/staging/panel/panel.c
deleted file mode 100644 (file)
index 4262db0..0000000
+++ /dev/null
@@ -1,2445 +0,0 @@
-/*
- * Front panel driver for Linux
- * Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
- * This code drives an LCD module (/dev/lcd), and a keypad (/dev/keypad)
- * connected to a parallel printer port.
- *
- * The LCD module may either be an HD44780-like 8-bit parallel LCD, or a 1-bit
- * serial module compatible with Samsung's KS0074. The pins may be connected in
- * any combination, everything is programmable.
- *
- * The keypad consists in a matrix of push buttons connecting input pins to
- * data output pins or to the ground. The combinations have to be hard-coded
- * in the driver, though several profiles exist and adding new ones is easy.
- *
- * Several profiles are provided for commonly found LCD+keypad modules on the
- * market, such as those found in Nexcom's appliances.
- *
- * FIXME:
- *      - the initialization/deinitialization process is very dirty and should
- *        be rewritten. It may even be buggy.
- *
- * TODO:
- *     - document 24 keys keyboard (3 rows of 8 cols, 32 diodes + 2 inputs)
- *      - make the LCD a part of a virtual screen of Vx*Vy
- *     - make the inputs list smp-safe
- *      - change the keyboard to a double mapping : signals -> key_id -> values
- *        so that applications can change values without knowing signals
- *
- */
-
-#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
-
-#include <linux/module.h>
-
-#include <linux/types.h>
-#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/sched.h>
-#include <linux/spinlock.h>
-#include <linux/interrupt.h>
-#include <linux/miscdevice.h>
-#include <linux/slab.h>
-#include <linux/ioport.h>
-#include <linux/fcntl.h>
-#include <linux/init.h>
-#include <linux/delay.h>
-#include <linux/kernel.h>
-#include <linux/ctype.h>
-#include <linux/parport.h>
-#include <linux/list.h>
-#include <linux/notifier.h>
-#include <linux/reboot.h>
-#include <generated/utsrelease.h>
-
-#include <linux/io.h>
-#include <linux/uaccess.h>
-
-#define LCD_MINOR              156
-#define KEYPAD_MINOR           185
-
-#define PANEL_VERSION          "0.9.5"
-
-#define LCD_MAXBYTES           256     /* max burst write */
-
-#define KEYPAD_BUFFER          64
-
-/* poll the keyboard this every second */
-#define INPUT_POLL_TIME                (HZ / 50)
-/* a key starts to repeat after this times INPUT_POLL_TIME */
-#define KEYPAD_REP_START       (10)
-/* a key repeats this times INPUT_POLL_TIME */
-#define KEYPAD_REP_DELAY       (2)
-
-/* keep the light on this times INPUT_POLL_TIME for each flash */
-#define FLASH_LIGHT_TEMPO      (200)
-
-/* converts an r_str() input to an active high, bits string : 000BAOSE */
-#define PNL_PINPUT(a)          ((((unsigned char)(a)) ^ 0x7F) >> 3)
-
-#define PNL_PBUSY              0x80    /* inverted input, active low */
-#define PNL_PACK               0x40    /* direct input, active low */
-#define PNL_POUTPA             0x20    /* direct input, active high */
-#define PNL_PSELECD            0x10    /* direct input, active high */
-#define PNL_PERRORP            0x08    /* direct input, active low */
-
-#define PNL_PBIDIR             0x20    /* bi-directional ports */
-/* high to read data in or-ed with data out */
-#define PNL_PINTEN             0x10
-#define PNL_PSELECP            0x08    /* inverted output, active low */
-#define PNL_PINITP             0x04    /* direct output, active low */
-#define PNL_PAUTOLF            0x02    /* inverted output, active low */
-#define PNL_PSTROBE            0x01    /* inverted output */
-
-#define PNL_PD0                        0x01
-#define PNL_PD1                        0x02
-#define PNL_PD2                        0x04
-#define PNL_PD3                        0x08
-#define PNL_PD4                        0x10
-#define PNL_PD5                        0x20
-#define PNL_PD6                        0x40
-#define PNL_PD7                        0x80
-
-#define PIN_NONE               0
-#define PIN_STROBE             1
-#define PIN_D0                 2
-#define PIN_D1                 3
-#define PIN_D2                 4
-#define PIN_D3                 5
-#define PIN_D4                 6
-#define PIN_D5                 7
-#define PIN_D6                 8
-#define PIN_D7                 9
-#define PIN_AUTOLF             14
-#define PIN_INITP              16
-#define PIN_SELECP             17
-#define PIN_NOT_SET            127
-
-#define LCD_FLAG_S             0x0001
-#define LCD_FLAG_ID            0x0002
-#define LCD_FLAG_B             0x0004  /* blink on */
-#define LCD_FLAG_C             0x0008  /* cursor on */
-#define LCD_FLAG_D             0x0010  /* display on */
-#define LCD_FLAG_F             0x0020  /* large font mode */
-#define LCD_FLAG_N             0x0040  /* 2-rows mode */
-#define LCD_FLAG_L             0x0080  /* backlight enabled */
-
-/* LCD commands */
-#define LCD_CMD_DISPLAY_CLEAR  0x01    /* Clear entire display */
-
-#define LCD_CMD_ENTRY_MODE     0x04    /* Set entry mode */
-#define LCD_CMD_CURSOR_INC     0x02    /* Increment cursor */
-
-#define LCD_CMD_DISPLAY_CTRL   0x08    /* Display control */
-#define LCD_CMD_DISPLAY_ON     0x04    /* Set display on */
-#define LCD_CMD_CURSOR_ON      0x02    /* Set cursor on */
-#define LCD_CMD_BLINK_ON       0x01    /* Set blink on */
-
-#define LCD_CMD_SHIFT          0x10    /* Shift cursor/display */
-#define LCD_CMD_DISPLAY_SHIFT  0x08    /* Shift display instead of cursor */
-#define LCD_CMD_SHIFT_RIGHT    0x04    /* Shift display/cursor to the right */
-
-#define LCD_CMD_FUNCTION_SET   0x20    /* Set function */
-#define LCD_CMD_DATA_LEN_8BITS 0x10    /* Set data length to 8 bits */
-#define LCD_CMD_TWO_LINES      0x08    /* Set to two display lines */
-#define LCD_CMD_FONT_5X10_DOTS 0x04    /* Set char font to 5x10 dots */
-
-#define LCD_CMD_SET_CGRAM_ADDR 0x40    /* Set char generator RAM address */
-
-#define LCD_CMD_SET_DDRAM_ADDR 0x80    /* Set display data RAM address */
-
-#define LCD_ESCAPE_LEN         24      /* max chars for LCD escape command */
-#define LCD_ESCAPE_CHAR        27      /* use char 27 for escape command */
-
-#define NOT_SET                        -1
-
-/* macros to simplify use of the parallel port */
-#define r_ctr(x)        (parport_read_control((x)->port))
-#define r_dtr(x)        (parport_read_data((x)->port))
-#define r_str(x)        (parport_read_status((x)->port))
-#define w_ctr(x, y)     (parport_write_control((x)->port, (y)))
-#define w_dtr(x, y)     (parport_write_data((x)->port, (y)))
-
-/* this defines which bits are to be used and which ones to be ignored */
-/* logical or of the output bits involved in the scan matrix */
-static __u8 scan_mask_o;
-/* logical or of the input bits involved in the scan matrix */
-static __u8 scan_mask_i;
-
-enum input_type {
-       INPUT_TYPE_STD,
-       INPUT_TYPE_KBD,
-};
-
-enum input_state {
-       INPUT_ST_LOW,
-       INPUT_ST_RISING,
-       INPUT_ST_HIGH,
-       INPUT_ST_FALLING,
-};
-
-struct logical_input {
-       struct list_head list;
-       __u64 mask;
-       __u64 value;
-       enum input_type type;
-       enum input_state state;
-       __u8 rise_time, fall_time;
-       __u8 rise_timer, fall_timer, high_timer;
-
-       union {
-               struct {        /* valid when type == INPUT_TYPE_STD */
-                       void (*press_fct)(int);
-                       void (*release_fct)(int);
-                       int press_data;
-                       int release_data;
-               } std;
-               struct {        /* valid when type == INPUT_TYPE_KBD */
-                       /* strings can be non null-terminated */
-                       char press_str[sizeof(void *) + sizeof(int)];
-                       char repeat_str[sizeof(void *) + sizeof(int)];
-                       char release_str[sizeof(void *) + sizeof(int)];
-               } kbd;
-       } u;
-};
-
-static LIST_HEAD(logical_inputs);      /* list of all defined logical inputs */
-
-/* physical contacts history
- * Physical contacts are a 45 bits string of 9 groups of 5 bits each.
- * The 8 lower groups correspond to output bits 0 to 7, and the 9th group
- * corresponds to the ground.
- * Within each group, bits are stored in the same order as read on the port :
- * BAPSE (busy=4, ack=3, paper empty=2, select=1, error=0).
- * So, each __u64 is represented like this :
- * 0000000000000000000BAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSE
- * <-----unused------><gnd><d07><d06><d05><d04><d03><d02><d01><d00>
- */
-
-/* what has just been read from the I/O ports */
-static __u64 phys_read;
-/* previous phys_read */
-static __u64 phys_read_prev;
-/* stabilized phys_read (phys_read|phys_read_prev) */
-static __u64 phys_curr;
-/* previous phys_curr */
-static __u64 phys_prev;
-/* 0 means that at least one logical signal needs be computed */
-static char inputs_stable;
-
-/* these variables are specific to the keypad */
-static struct {
-       bool enabled;
-} keypad;
-
-static char keypad_buffer[KEYPAD_BUFFER];
-static int keypad_buflen;
-static int keypad_start;
-static char keypressed;
-static wait_queue_head_t keypad_read_wait;
-
-/* lcd-specific variables */
-static struct {
-       bool enabled;
-       bool initialized;
-       bool must_clear;
-
-       int height;
-       int width;
-       int bwidth;
-       int hwidth;
-       int charset;
-       int proto;
-       int light_tempo;
-
-       /* TODO: use union here? */
-       struct {
-               int e;
-               int rs;
-               int rw;
-               int cl;
-               int da;
-               int bl;
-       } pins;
-
-       /* contains the LCD config state */
-       unsigned long int flags;
-
-       /* Contains the LCD X and Y offset */
-       struct {
-               unsigned long int x;
-               unsigned long int y;
-       } addr;
-
-       /* Current escape sequence and it's length or -1 if outside */
-       struct {
-               char buf[LCD_ESCAPE_LEN + 1];
-               int len;
-       } esc_seq;
-} lcd;
-
-/* Needed only for init */
-static int selected_lcd_type = NOT_SET;
-
-/*
- * Bit masks to convert LCD signals to parallel port outputs.
- * _d_ are values for data port, _c_ are for control port.
- * [0] = signal OFF, [1] = signal ON, [2] = mask
- */
-#define BIT_CLR                0
-#define BIT_SET                1
-#define BIT_MSK                2
-#define BIT_STATES     3
-/*
- * one entry for each bit on the LCD
- */
-#define LCD_BIT_E      0
-#define LCD_BIT_RS     1
-#define LCD_BIT_RW     2
-#define LCD_BIT_BL     3
-#define LCD_BIT_CL     4
-#define LCD_BIT_DA     5
-#define LCD_BITS       6
-
-/*
- * each bit can be either connected to a DATA or CTRL port
- */
-#define LCD_PORT_C     0
-#define LCD_PORT_D     1
-#define LCD_PORTS      2
-
-static unsigned char lcd_bits[LCD_PORTS][LCD_BITS][BIT_STATES];
-
-/*
- * LCD protocols
- */
-#define LCD_PROTO_PARALLEL      0
-#define LCD_PROTO_SERIAL        1
-#define LCD_PROTO_TI_DA8XX_LCD 2
-
-/*
- * LCD character sets
- */
-#define LCD_CHARSET_NORMAL      0
-#define LCD_CHARSET_KS0074      1
-
-/*
- * LCD types
- */
-#define LCD_TYPE_NONE          0
-#define LCD_TYPE_CUSTOM                1
-#define LCD_TYPE_OLD           2
-#define LCD_TYPE_KS0074                3
-#define LCD_TYPE_HANTRONIX     4
-#define LCD_TYPE_NEXCOM                5
-
-/*
- * keypad types
- */
-#define KEYPAD_TYPE_NONE       0
-#define KEYPAD_TYPE_OLD                1
-#define KEYPAD_TYPE_NEW                2
-#define KEYPAD_TYPE_NEXCOM     3
-
-/*
- * panel profiles
- */
-#define PANEL_PROFILE_CUSTOM   0
-#define PANEL_PROFILE_OLD      1
-#define PANEL_PROFILE_NEW      2
-#define PANEL_PROFILE_HANTRONIX        3
-#define PANEL_PROFILE_NEXCOM   4
-#define PANEL_PROFILE_LARGE    5
-
-/*
- * Construct custom config from the kernel's configuration
- */
-#define DEFAULT_PARPORT         0
-#define DEFAULT_PROFILE         PANEL_PROFILE_LARGE
-#define DEFAULT_KEYPAD_TYPE     KEYPAD_TYPE_OLD
-#define DEFAULT_LCD_TYPE        LCD_TYPE_OLD
-#define DEFAULT_LCD_HEIGHT      2
-#define DEFAULT_LCD_WIDTH       40
-#define DEFAULT_LCD_BWIDTH      40
-#define DEFAULT_LCD_HWIDTH      64
-#define DEFAULT_LCD_CHARSET     LCD_CHARSET_NORMAL
-#define DEFAULT_LCD_PROTO       LCD_PROTO_PARALLEL
-
-#define DEFAULT_LCD_PIN_E       PIN_AUTOLF
-#define DEFAULT_LCD_PIN_RS      PIN_SELECP
-#define DEFAULT_LCD_PIN_RW      PIN_INITP
-#define DEFAULT_LCD_PIN_SCL     PIN_STROBE
-#define DEFAULT_LCD_PIN_SDA     PIN_D0
-#define DEFAULT_LCD_PIN_BL      PIN_NOT_SET
-
-#ifdef CONFIG_PANEL_PARPORT
-#undef DEFAULT_PARPORT
-#define DEFAULT_PARPORT CONFIG_PANEL_PARPORT
-#endif
-
-#ifdef CONFIG_PANEL_PROFILE
-#undef DEFAULT_PROFILE
-#define DEFAULT_PROFILE CONFIG_PANEL_PROFILE
-#endif
-
-#if DEFAULT_PROFILE == 0       /* custom */
-#ifdef CONFIG_PANEL_KEYPAD
-#undef DEFAULT_KEYPAD_TYPE
-#define DEFAULT_KEYPAD_TYPE CONFIG_PANEL_KEYPAD
-#endif
-
-#ifdef CONFIG_PANEL_LCD
-#undef DEFAULT_LCD_TYPE
-#define DEFAULT_LCD_TYPE CONFIG_PANEL_LCD
-#endif
-
-#ifdef CONFIG_PANEL_LCD_HEIGHT
-#undef DEFAULT_LCD_HEIGHT
-#define DEFAULT_LCD_HEIGHT CONFIG_PANEL_LCD_HEIGHT
-#endif
-
-#ifdef CONFIG_PANEL_LCD_WIDTH
-#undef DEFAULT_LCD_WIDTH
-#define DEFAULT_LCD_WIDTH CONFIG_PANEL_LCD_WIDTH
-#endif
-
-#ifdef CONFIG_PANEL_LCD_BWIDTH
-#undef DEFAULT_LCD_BWIDTH
-#define DEFAULT_LCD_BWIDTH CONFIG_PANEL_LCD_BWIDTH
-#endif
-
-#ifdef CONFIG_PANEL_LCD_HWIDTH
-#undef DEFAULT_LCD_HWIDTH
-#define DEFAULT_LCD_HWIDTH CONFIG_PANEL_LCD_HWIDTH
-#endif
-
-#ifdef CONFIG_PANEL_LCD_CHARSET
-#undef DEFAULT_LCD_CHARSET
-#define DEFAULT_LCD_CHARSET CONFIG_PANEL_LCD_CHARSET
-#endif
-
-#ifdef CONFIG_PANEL_LCD_PROTO
-#undef DEFAULT_LCD_PROTO
-#define DEFAULT_LCD_PROTO CONFIG_PANEL_LCD_PROTO
-#endif
-
-#ifdef CONFIG_PANEL_LCD_PIN_E
-#undef DEFAULT_LCD_PIN_E
-#define DEFAULT_LCD_PIN_E CONFIG_PANEL_LCD_PIN_E
-#endif
-
-#ifdef CONFIG_PANEL_LCD_PIN_RS
-#undef DEFAULT_LCD_PIN_RS
-#define DEFAULT_LCD_PIN_RS CONFIG_PANEL_LCD_PIN_RS
-#endif
-
-#ifdef CONFIG_PANEL_LCD_PIN_RW
-#undef DEFAULT_LCD_PIN_RW
-#define DEFAULT_LCD_PIN_RW CONFIG_PANEL_LCD_PIN_RW
-#endif
-
-#ifdef CONFIG_PANEL_LCD_PIN_SCL
-#undef DEFAULT_LCD_PIN_SCL
-#define DEFAULT_LCD_PIN_SCL CONFIG_PANEL_LCD_PIN_SCL
-#endif
-
-#ifdef CONFIG_PANEL_LCD_PIN_SDA
-#undef DEFAULT_LCD_PIN_SDA
-#define DEFAULT_LCD_PIN_SDA CONFIG_PANEL_LCD_PIN_SDA
-#endif
-
-#ifdef CONFIG_PANEL_LCD_PIN_BL
-#undef DEFAULT_LCD_PIN_BL
-#define DEFAULT_LCD_PIN_BL CONFIG_PANEL_LCD_PIN_BL
-#endif
-
-#endif /* DEFAULT_PROFILE == 0 */
-
-/* global variables */
-
-/* Device single-open policy control */
-static atomic_t lcd_available = ATOMIC_INIT(1);
-static atomic_t keypad_available = ATOMIC_INIT(1);
-
-static struct pardevice *pprt;
-
-static int keypad_initialized;
-
-static void (*lcd_write_cmd)(int);
-static void (*lcd_write_data)(int);
-static void (*lcd_clear_fast)(void);
-
-static DEFINE_SPINLOCK(pprt_lock);
-static struct timer_list scan_timer;
-
-MODULE_DESCRIPTION("Generic parallel port LCD/Keypad driver");
-
-static int parport = DEFAULT_PARPORT;
-module_param(parport, int, 0000);
-MODULE_PARM_DESC(parport, "Parallel port index (0=lpt1, 1=lpt2, ...)");
-
-static int profile = DEFAULT_PROFILE;
-module_param(profile, int, 0000);
-MODULE_PARM_DESC(profile,
-                "1=16x2 old kp; 2=serial 16x2, new kp; 3=16x2 hantronix; "
-                "4=16x2 nexcom; default=40x2, old kp");
-
-static int keypad_type = NOT_SET;
-module_param(keypad_type, int, 0000);
-MODULE_PARM_DESC(keypad_type,
-                "Keypad type: 0=none, 1=old 6 keys, 2=new 6+1 keys, 3=nexcom 4 keys");
-
-static int lcd_type = NOT_SET;
-module_param(lcd_type, int, 0000);
-MODULE_PARM_DESC(lcd_type,
-                "LCD type: 0=none, 1=compiled-in, 2=old, 3=serial ks0074, 4=hantronix, 5=nexcom");
-
-static int lcd_height = NOT_SET;
-module_param(lcd_height, int, 0000);
-MODULE_PARM_DESC(lcd_height, "Number of lines on the LCD");
-
-static int lcd_width = NOT_SET;
-module_param(lcd_width, int, 0000);
-MODULE_PARM_DESC(lcd_width, "Number of columns on the LCD");
-
-static int lcd_bwidth = NOT_SET;       /* internal buffer width (usually 40) */
-module_param(lcd_bwidth, int, 0000);
-MODULE_PARM_DESC(lcd_bwidth, "Internal LCD line width (40)");
-
-static int lcd_hwidth = NOT_SET;       /* hardware buffer width (usually 64) */
-module_param(lcd_hwidth, int, 0000);
-MODULE_PARM_DESC(lcd_hwidth, "LCD line hardware address (64)");
-
-static int lcd_charset = NOT_SET;
-module_param(lcd_charset, int, 0000);
-MODULE_PARM_DESC(lcd_charset, "LCD character set: 0=standard, 1=KS0074");
-
-static int lcd_proto = NOT_SET;
-module_param(lcd_proto, int, 0000);
-MODULE_PARM_DESC(lcd_proto,
-                "LCD communication: 0=parallel (//), 1=serial, 2=TI LCD Interface");
-
-/*
- * These are the parallel port pins the LCD control signals are connected to.
- * Set this to 0 if the signal is not used. Set it to its opposite value
- * (negative) if the signal is negated. -MAXINT is used to indicate that the
- * pin has not been explicitly specified.
- *
- * WARNING! no check will be performed about collisions with keypad !
- */
-
-static int lcd_e_pin  = PIN_NOT_SET;
-module_param(lcd_e_pin, int, 0000);
-MODULE_PARM_DESC(lcd_e_pin,
-                "# of the // port pin connected to LCD 'E' signal, with polarity (-17..17)");
-
-static int lcd_rs_pin = PIN_NOT_SET;
-module_param(lcd_rs_pin, int, 0000);
-MODULE_PARM_DESC(lcd_rs_pin,
-                "# of the // port pin connected to LCD 'RS' signal, with polarity (-17..17)");
-
-static int lcd_rw_pin = PIN_NOT_SET;
-module_param(lcd_rw_pin, int, 0000);
-MODULE_PARM_DESC(lcd_rw_pin,
-                "# of the // port pin connected to LCD 'RW' signal, with polarity (-17..17)");
-
-static int lcd_cl_pin = PIN_NOT_SET;
-module_param(lcd_cl_pin, int, 0000);
-MODULE_PARM_DESC(lcd_cl_pin,
-                "# of the // port pin connected to serial LCD 'SCL' signal, with polarity (-17..17)");
-
-static int lcd_da_pin = PIN_NOT_SET;
-module_param(lcd_da_pin, int, 0000);
-MODULE_PARM_DESC(lcd_da_pin,
-                "# of the // port pin connected to serial LCD 'SDA' signal, with polarity (-17..17)");
-
-static int lcd_bl_pin = PIN_NOT_SET;
-module_param(lcd_bl_pin, int, 0000);
-MODULE_PARM_DESC(lcd_bl_pin,
-                "# of the // port pin connected to LCD backlight, with polarity (-17..17)");
-
-/* Deprecated module parameters - consider not using them anymore */
-
-static int lcd_enabled = NOT_SET;
-module_param(lcd_enabled, int, 0000);
-MODULE_PARM_DESC(lcd_enabled, "Deprecated option, use lcd_type instead");
-
-static int keypad_enabled = NOT_SET;
-module_param(keypad_enabled, int, 0000);
-MODULE_PARM_DESC(keypad_enabled, "Deprecated option, use keypad_type instead");
-
-static const unsigned char *lcd_char_conv;
-
-/* for some LCD drivers (ks0074) we need a charset conversion table. */
-static const unsigned char lcd_char_conv_ks0074[256] = {
-       /*          0|8   1|9   2|A   3|B   4|C   5|D   6|E   7|F */
-       /* 0x00 */ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
-       /* 0x08 */ 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
-       /* 0x10 */ 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
-       /* 0x18 */ 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
-       /* 0x20 */ 0x20, 0x21, 0x22, 0x23, 0xa2, 0x25, 0x26, 0x27,
-       /* 0x28 */ 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
-       /* 0x30 */ 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
-       /* 0x38 */ 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
-       /* 0x40 */ 0xa0, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
-       /* 0x48 */ 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
-       /* 0x50 */ 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
-       /* 0x58 */ 0x58, 0x59, 0x5a, 0xfa, 0xfb, 0xfc, 0x1d, 0xc4,
-       /* 0x60 */ 0x96, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
-       /* 0x68 */ 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
-       /* 0x70 */ 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
-       /* 0x78 */ 0x78, 0x79, 0x7a, 0xfd, 0xfe, 0xff, 0xce, 0x20,
-       /* 0x80 */ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
-       /* 0x88 */ 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
-       /* 0x90 */ 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
-       /* 0x98 */ 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
-       /* 0xA0 */ 0x20, 0x40, 0xb1, 0xa1, 0x24, 0xa3, 0xfe, 0x5f,
-       /* 0xA8 */ 0x22, 0xc8, 0x61, 0x14, 0x97, 0x2d, 0xad, 0x96,
-       /* 0xB0 */ 0x80, 0x8c, 0x82, 0x83, 0x27, 0x8f, 0x86, 0xdd,
-       /* 0xB8 */ 0x2c, 0x81, 0x6f, 0x15, 0x8b, 0x8a, 0x84, 0x60,
-       /* 0xC0 */ 0xe2, 0xe2, 0xe2, 0x5b, 0x5b, 0xae, 0xbc, 0xa9,
-       /* 0xC8 */ 0xc5, 0xbf, 0xc6, 0xf1, 0xe3, 0xe3, 0xe3, 0xe3,
-       /* 0xD0 */ 0x44, 0x5d, 0xa8, 0xe4, 0xec, 0xec, 0x5c, 0x78,
-       /* 0xD8 */ 0xab, 0xa6, 0xe5, 0x5e, 0x5e, 0xe6, 0xaa, 0xbe,
-       /* 0xE0 */ 0x7f, 0xe7, 0xaf, 0x7b, 0x7b, 0xaf, 0xbd, 0xc8,
-       /* 0xE8 */ 0xa4, 0xa5, 0xc7, 0xf6, 0xa7, 0xe8, 0x69, 0x69,
-       /* 0xF0 */ 0xed, 0x7d, 0xa8, 0xe4, 0xec, 0x5c, 0x5c, 0x25,
-       /* 0xF8 */ 0xac, 0xa6, 0xea, 0xef, 0x7e, 0xeb, 0xb2, 0x79,
-};
-
-static const char old_keypad_profile[][4][9] = {
-       {"S0", "Left\n", "Left\n", ""},
-       {"S1", "Down\n", "Down\n", ""},
-       {"S2", "Up\n", "Up\n", ""},
-       {"S3", "Right\n", "Right\n", ""},
-       {"S4", "Esc\n", "Esc\n", ""},
-       {"S5", "Ret\n", "Ret\n", ""},
-       {"", "", "", ""}
-};
-
-/* signals, press, repeat, release */
-static const char new_keypad_profile[][4][9] = {
-       {"S0", "Left\n", "Left\n", ""},
-       {"S1", "Down\n", "Down\n", ""},
-       {"S2", "Up\n", "Up\n", ""},
-       {"S3", "Right\n", "Right\n", ""},
-       {"S4s5", "", "Esc\n", "Esc\n"},
-       {"s4S5", "", "Ret\n", "Ret\n"},
-       {"S4S5", "Help\n", "", ""},
-       /* add new signals above this line */
-       {"", "", "", ""}
-};
-
-/* signals, press, repeat, release */
-static const char nexcom_keypad_profile[][4][9] = {
-       {"a-p-e-", "Down\n", "Down\n", ""},
-       {"a-p-E-", "Ret\n", "Ret\n", ""},
-       {"a-P-E-", "Esc\n", "Esc\n", ""},
-       {"a-P-e-", "Up\n", "Up\n", ""},
-       /* add new signals above this line */
-       {"", "", "", ""}
-};
-
-static const char (*keypad_profile)[4][9] = old_keypad_profile;
-
-/* FIXME: this should be converted to a bit array containing signals states */
-static struct {
-       unsigned char e;  /* parallel LCD E (data latch on falling edge) */
-       unsigned char rs; /* parallel LCD RS  (0 = cmd, 1 = data) */
-       unsigned char rw; /* parallel LCD R/W (0 = W, 1 = R) */
-       unsigned char bl; /* parallel LCD backlight (0 = off, 1 = on) */
-       unsigned char cl; /* serial LCD clock (latch on rising edge) */
-       unsigned char da; /* serial LCD data */
-} bits;
-
-static void init_scan_timer(void);
-
-/* sets data port bits according to current signals values */
-static int set_data_bits(void)
-{
-       int val, bit;
-
-       val = r_dtr(pprt);
-       for (bit = 0; bit < LCD_BITS; bit++)
-               val &= lcd_bits[LCD_PORT_D][bit][BIT_MSK];
-
-       val |= lcd_bits[LCD_PORT_D][LCD_BIT_E][bits.e]
-           | lcd_bits[LCD_PORT_D][LCD_BIT_RS][bits.rs]
-           | lcd_bits[LCD_PORT_D][LCD_BIT_RW][bits.rw]
-           | lcd_bits[LCD_PORT_D][LCD_BIT_BL][bits.bl]
-           | lcd_bits[LCD_PORT_D][LCD_BIT_CL][bits.cl]
-           | lcd_bits[LCD_PORT_D][LCD_BIT_DA][bits.da];
-
-       w_dtr(pprt, val);
-       return val;
-}
-
-/* sets ctrl port bits according to current signals values */
-static int set_ctrl_bits(void)
-{
-       int val, bit;
-
-       val = r_ctr(pprt);
-       for (bit = 0; bit < LCD_BITS; bit++)
-               val &= lcd_bits[LCD_PORT_C][bit][BIT_MSK];
-
-       val |= lcd_bits[LCD_PORT_C][LCD_BIT_E][bits.e]
-           | lcd_bits[LCD_PORT_C][LCD_BIT_RS][bits.rs]
-           | lcd_bits[LCD_PORT_C][LCD_BIT_RW][bits.rw]
-           | lcd_bits[LCD_PORT_C][LCD_BIT_BL][bits.bl]
-           | lcd_bits[LCD_PORT_C][LCD_BIT_CL][bits.cl]
-           | lcd_bits[LCD_PORT_C][LCD_BIT_DA][bits.da];
-
-       w_ctr(pprt, val);
-       return val;
-}
-
-/* sets ctrl & data port bits according to current signals values */
-static void panel_set_bits(void)
-{
-       set_data_bits();
-       set_ctrl_bits();
-}
-
-/*
- * Converts a parallel port pin (from -25 to 25) to data and control ports
- * masks, and data and control port bits. The signal will be considered
- * unconnected if it's on pin 0 or an invalid pin (<-25 or >25).
- *
- * Result will be used this way :
- *   out(dport, in(dport) & d_val[2] | d_val[signal_state])
- *   out(cport, in(cport) & c_val[2] | c_val[signal_state])
- */
-static void pin_to_bits(int pin, unsigned char *d_val, unsigned char *c_val)
-{
-       int d_bit, c_bit, inv;
-
-       d_val[0] = 0;
-       c_val[0] = 0;
-       d_val[1] = 0;
-       c_val[1] = 0;
-       d_val[2] = 0xFF;
-       c_val[2] = 0xFF;
-
-       if (pin == 0)
-               return;
-
-       inv = (pin < 0);
-       if (inv)
-               pin = -pin;
-
-       d_bit = 0;
-       c_bit = 0;
-
-       switch (pin) {
-       case PIN_STROBE:        /* strobe, inverted */
-               c_bit = PNL_PSTROBE;
-               inv = !inv;
-               break;
-       case PIN_D0...PIN_D7:   /* D0 - D7 = 2 - 9 */
-               d_bit = 1 << (pin - 2);
-               break;
-       case PIN_AUTOLF:        /* autofeed, inverted */
-               c_bit = PNL_PAUTOLF;
-               inv = !inv;
-               break;
-       case PIN_INITP:         /* init, direct */
-               c_bit = PNL_PINITP;
-               break;
-       case PIN_SELECP:        /* select_in, inverted */
-               c_bit = PNL_PSELECP;
-               inv = !inv;
-               break;
-       default:                /* unknown pin, ignore */
-               break;
-       }
-
-       if (c_bit) {
-               c_val[2] &= ~c_bit;
-               c_val[!inv] = c_bit;
-       } else if (d_bit) {
-               d_val[2] &= ~d_bit;
-               d_val[!inv] = d_bit;
-       }
-}
-
-/* sleeps that many milliseconds with a reschedule */
-static void long_sleep(int ms)
-{
-       if (in_interrupt())
-               mdelay(ms);
-       else
-               schedule_timeout_interruptible(msecs_to_jiffies(ms));
-}
-
-/*
- * send a serial byte to the LCD panel. The caller is responsible for locking
- * if needed.
- */
-static void lcd_send_serial(int byte)
-{
-       int bit;
-
-       /*
-        * the data bit is set on D0, and the clock on STROBE.
-        * LCD reads D0 on STROBE's rising edge.
-        */
-       for (bit = 0; bit < 8; bit++) {
-               bits.cl = BIT_CLR;      /* CLK low */
-               panel_set_bits();
-               bits.da = byte & 1;
-               panel_set_bits();
-               udelay(2);  /* maintain the data during 2 us before CLK up */
-               bits.cl = BIT_SET;      /* CLK high */
-               panel_set_bits();
-               udelay(1);  /* maintain the strobe during 1 us */
-               byte >>= 1;
-       }
-}
-
-/* turn the backlight on or off */
-static void lcd_backlight(int on)
-{
-       if (lcd.pins.bl == PIN_NONE)
-               return;
-
-       /* The backlight is activated by setting the AUTOFEED line to +5V  */
-       spin_lock_irq(&pprt_lock);
-       bits.bl = on;
-       panel_set_bits();
-       spin_unlock_irq(&pprt_lock);
-}
-
-/* send a command to the LCD panel in serial mode */
-static void lcd_write_cmd_s(int cmd)
-{
-       spin_lock_irq(&pprt_lock);
-       lcd_send_serial(0x1F);  /* R/W=W, RS=0 */
-       lcd_send_serial(cmd & 0x0F);
-       lcd_send_serial((cmd >> 4) & 0x0F);
-       udelay(40);             /* the shortest command takes at least 40 us */
-       spin_unlock_irq(&pprt_lock);
-}
-
-/* send data to the LCD panel in serial mode */
-static void lcd_write_data_s(int data)
-{
-       spin_lock_irq(&pprt_lock);
-       lcd_send_serial(0x5F);  /* R/W=W, RS=1 */
-       lcd_send_serial(data & 0x0F);
-       lcd_send_serial((data >> 4) & 0x0F);
-       udelay(40);             /* the shortest data takes at least 40 us */
-       spin_unlock_irq(&pprt_lock);
-}
-
-/* send a command to the LCD panel in 8 bits parallel mode */
-static void lcd_write_cmd_p8(int cmd)
-{
-       spin_lock_irq(&pprt_lock);
-       /* present the data to the data port */
-       w_dtr(pprt, cmd);
-       udelay(20);     /* maintain the data during 20 us before the strobe */
-
-       bits.e = BIT_SET;
-       bits.rs = BIT_CLR;
-       bits.rw = BIT_CLR;
-       set_ctrl_bits();
-
-       udelay(40);     /* maintain the strobe during 40 us */
-
-       bits.e = BIT_CLR;
-       set_ctrl_bits();
-
-       udelay(120);    /* the shortest command takes at least 120 us */
-       spin_unlock_irq(&pprt_lock);
-}
-
-/* send data to the LCD panel in 8 bits parallel mode */
-static void lcd_write_data_p8(int data)
-{
-       spin_lock_irq(&pprt_lock);
-       /* present the data to the data port */
-       w_dtr(pprt, data);
-       udelay(20);     /* maintain the data during 20 us before the strobe */
-
-       bits.e = BIT_SET;
-       bits.rs = BIT_SET;
-       bits.rw = BIT_CLR;
-       set_ctrl_bits();
-
-       udelay(40);     /* maintain the strobe during 40 us */
-
-       bits.e = BIT_CLR;
-       set_ctrl_bits();
-
-       udelay(45);     /* the shortest data takes at least 45 us */
-       spin_unlock_irq(&pprt_lock);
-}
-
-/* send a command to the TI LCD panel */
-static void lcd_write_cmd_tilcd(int cmd)
-{
-       spin_lock_irq(&pprt_lock);
-       /* present the data to the control port */
-       w_ctr(pprt, cmd);
-       udelay(60);
-       spin_unlock_irq(&pprt_lock);
-}
-
-/* send data to the TI LCD panel */
-static void lcd_write_data_tilcd(int data)
-{
-       spin_lock_irq(&pprt_lock);
-       /* present the data to the data port */
-       w_dtr(pprt, data);
-       udelay(60);
-       spin_unlock_irq(&pprt_lock);
-}
-
-static void lcd_gotoxy(void)
-{
-       lcd_write_cmd(LCD_CMD_SET_DDRAM_ADDR
-                     | (lcd.addr.y ? lcd.hwidth : 0)
-                     /*
-                      * we force the cursor to stay at the end of the
-                      * line if it wants to go farther
-                      */
-                     | ((lcd.addr.x < lcd.bwidth) ? lcd.addr.x &
-                        (lcd.hwidth - 1) : lcd.bwidth - 1));
-}
-
-static void lcd_print(char c)
-{
-       if (lcd.addr.x < lcd.bwidth) {
-               if (lcd_char_conv)
-                       c = lcd_char_conv[(unsigned char)c];
-               lcd_write_data(c);
-               lcd.addr.x++;
-       }
-       /* prevents the cursor from wrapping onto the next line */
-       if (lcd.addr.x == lcd.bwidth)
-               lcd_gotoxy();
-}
-
-/* fills the display with spaces and resets X/Y */
-static void lcd_clear_fast_s(void)
-{
-       int pos;
-
-       lcd.addr.x = 0;
-       lcd.addr.y = 0;
-       lcd_gotoxy();
-
-       spin_lock_irq(&pprt_lock);
-       for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) {
-               lcd_send_serial(0x5F);  /* R/W=W, RS=1 */
-               lcd_send_serial(' ' & 0x0F);
-               lcd_send_serial((' ' >> 4) & 0x0F);
-               /* the shortest data takes at least 40 us */
-               udelay(40);
-       }
-       spin_unlock_irq(&pprt_lock);
-
-       lcd.addr.x = 0;
-       lcd.addr.y = 0;
-       lcd_gotoxy();
-}
-
-/* fills the display with spaces and resets X/Y */
-static void lcd_clear_fast_p8(void)
-{
-       int pos;
-
-       lcd.addr.x = 0;
-       lcd.addr.y = 0;
-       lcd_gotoxy();
-
-       spin_lock_irq(&pprt_lock);
-       for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) {
-               /* present the data to the data port */
-               w_dtr(pprt, ' ');
-
-               /* maintain the data during 20 us before the strobe */
-               udelay(20);
-
-               bits.e = BIT_SET;
-               bits.rs = BIT_SET;
-               bits.rw = BIT_CLR;
-               set_ctrl_bits();
-
-               /* maintain the strobe during 40 us */
-               udelay(40);
-
-               bits.e = BIT_CLR;
-               set_ctrl_bits();
-
-               /* the shortest data takes at least 45 us */
-               udelay(45);
-       }
-       spin_unlock_irq(&pprt_lock);
-
-       lcd.addr.x = 0;
-       lcd.addr.y = 0;
-       lcd_gotoxy();
-}
-
-/* fills the display with spaces and resets X/Y */
-static void lcd_clear_fast_tilcd(void)
-{
-       int pos;
-
-       lcd.addr.x = 0;
-       lcd.addr.y = 0;
-       lcd_gotoxy();
-
-       spin_lock_irq(&pprt_lock);
-       for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) {
-               /* present the data to the data port */
-               w_dtr(pprt, ' ');
-               udelay(60);
-       }
-
-       spin_unlock_irq(&pprt_lock);
-
-       lcd.addr.x = 0;
-       lcd.addr.y = 0;
-       lcd_gotoxy();
-}
-
-/* clears the display and resets X/Y */
-static void lcd_clear_display(void)
-{
-       lcd_write_cmd(LCD_CMD_DISPLAY_CLEAR);
-       lcd.addr.x = 0;
-       lcd.addr.y = 0;
-       /* we must wait a few milliseconds (15) */
-       long_sleep(15);
-}
-
-static void lcd_init_display(void)
-{
-       lcd.flags = ((lcd.height > 1) ? LCD_FLAG_N : 0)
-           | LCD_FLAG_D | LCD_FLAG_C | LCD_FLAG_B;
-
-       long_sleep(20);         /* wait 20 ms after power-up for the paranoid */
-
-       /* 8bits, 1 line, small fonts; let's do it 3 times */
-       lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS);
-       long_sleep(10);
-       lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS);
-       long_sleep(10);
-       lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS);
-       long_sleep(10);
-
-       /* set font height and lines number */
-       lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS
-                     | ((lcd.flags & LCD_FLAG_F) ? LCD_CMD_FONT_5X10_DOTS : 0)
-                     | ((lcd.flags & LCD_FLAG_N) ? LCD_CMD_TWO_LINES : 0)
-           );
-       long_sleep(10);
-
-       /* display off, cursor off, blink off */
-       lcd_write_cmd(LCD_CMD_DISPLAY_CTRL);
-       long_sleep(10);
-
-       lcd_write_cmd(LCD_CMD_DISPLAY_CTRL      /* set display mode */
-                     | ((lcd.flags & LCD_FLAG_D) ? LCD_CMD_DISPLAY_ON : 0)
-                     | ((lcd.flags & LCD_FLAG_C) ? LCD_CMD_CURSOR_ON : 0)
-                     | ((lcd.flags & LCD_FLAG_B) ? LCD_CMD_BLINK_ON : 0)
-           );
-
-       lcd_backlight((lcd.flags & LCD_FLAG_L) ? 1 : 0);
-
-       long_sleep(10);
-
-       /* entry mode set : increment, cursor shifting */
-       lcd_write_cmd(LCD_CMD_ENTRY_MODE | LCD_CMD_CURSOR_INC);
-
-       lcd_clear_display();
-}
-
-/*
- * These are the file operation function for user access to /dev/lcd
- * This function can also be called from inside the kernel, by
- * setting file and ppos to NULL.
- *
- */
-
-static inline int handle_lcd_special_code(void)
-{
-       /* LCD special codes */
-
-       int processed = 0;
-
-       char *esc = lcd.esc_seq.buf + 2;
-       int oldflags = lcd.flags;
-
-       /* check for display mode flags */
-       switch (*esc) {
-       case 'D':       /* Display ON */
-               lcd.flags |= LCD_FLAG_D;
-               processed = 1;
-               break;
-       case 'd':       /* Display OFF */
-               lcd.flags &= ~LCD_FLAG_D;
-               processed = 1;
-               break;
-       case 'C':       /* Cursor ON */
-               lcd.flags |= LCD_FLAG_C;
-               processed = 1;
-               break;
-       case 'c':       /* Cursor OFF */
-               lcd.flags &= ~LCD_FLAG_C;
-               processed = 1;
-               break;
-       case 'B':       /* Blink ON */
-               lcd.flags |= LCD_FLAG_B;
-               processed = 1;
-               break;
-       case 'b':       /* Blink OFF */
-               lcd.flags &= ~LCD_FLAG_B;
-               processed = 1;
-               break;
-       case '+':       /* Back light ON */
-               lcd.flags |= LCD_FLAG_L;
-               processed = 1;
-               break;
-       case '-':       /* Back light OFF */
-               lcd.flags &= ~LCD_FLAG_L;
-               processed = 1;
-               break;
-       case '*':
-               /* flash back light using the keypad timer */
-               if (scan_timer.function) {
-                       if (lcd.light_tempo == 0 &&
-                           ((lcd.flags & LCD_FLAG_L) == 0))
-                               lcd_backlight(1);
-                       lcd.light_tempo = FLASH_LIGHT_TEMPO;
-               }
-               processed = 1;
-               break;
-       case 'f':       /* Small Font */
-               lcd.flags &= ~LCD_FLAG_F;
-               processed = 1;
-               break;
-       case 'F':       /* Large Font */
-               lcd.flags |= LCD_FLAG_F;
-               processed = 1;
-               break;
-       case 'n':       /* One Line */
-               lcd.flags &= ~LCD_FLAG_N;
-               processed = 1;
-               break;
-       case 'N':       /* Two Lines */
-               lcd.flags |= LCD_FLAG_N;
-               break;
-       case 'l':       /* Shift Cursor Left */
-               if (lcd.addr.x > 0) {
-                       /* back one char if not at end of line */
-                       if (lcd.addr.x < lcd.bwidth)
-                               lcd_write_cmd(LCD_CMD_SHIFT);
-                       lcd.addr.x--;
-               }
-               processed = 1;
-               break;
-       case 'r':       /* shift cursor right */
-               if (lcd.addr.x < lcd.width) {
-                       /* allow the cursor to pass the end of the line */
-                       if (lcd.addr.x < (lcd.bwidth - 1))
-                               lcd_write_cmd(LCD_CMD_SHIFT |
-                                               LCD_CMD_SHIFT_RIGHT);
-                       lcd.addr.x++;
-               }
-               processed = 1;
-               break;
-       case 'L':       /* shift display left */
-               lcd_write_cmd(LCD_CMD_SHIFT | LCD_CMD_DISPLAY_SHIFT);
-               processed = 1;
-               break;
-       case 'R':       /* shift display right */
-               lcd_write_cmd(LCD_CMD_SHIFT | LCD_CMD_DISPLAY_SHIFT |
-                               LCD_CMD_SHIFT_RIGHT);
-               processed = 1;
-               break;
-       case 'k': {     /* kill end of line */
-               int x;
-
-               for (x = lcd.addr.x; x < lcd.bwidth; x++)
-                       lcd_write_data(' ');
-
-               /* restore cursor position */
-               lcd_gotoxy();
-               processed = 1;
-               break;
-       }
-       case 'I':       /* reinitialize display */
-               lcd_init_display();
-               processed = 1;
-               break;
-       case 'G': {
-               /* Generator : LGcxxxxx...xx; must have <c> between '0'
-                * and '7', representing the numerical ASCII code of the
-                * redefined character, and <xx...xx> a sequence of 16
-                * hex digits representing 8 bytes for each character.
-                * Most LCDs will only use 5 lower bits of the 7 first
-                * bytes.
-                */
-
-               unsigned char cgbytes[8];
-               unsigned char cgaddr;
-               int cgoffset;
-               int shift;
-               char value;
-               int addr;
-
-               if (!strchr(esc, ';'))
-                       break;
-
-               esc++;
-
-               cgaddr = *(esc++) - '0';
-               if (cgaddr > 7) {
-                       processed = 1;
-                       break;
-               }
-
-               cgoffset = 0;
-               shift = 0;
-               value = 0;
-               while (*esc && cgoffset < 8) {
-                       shift ^= 4;
-                       if (*esc >= '0' && *esc <= '9') {
-                               value |= (*esc - '0') << shift;
-                       } else if (*esc >= 'A' && *esc <= 'Z') {
-                               value |= (*esc - 'A' + 10) << shift;
-                       } else if (*esc >= 'a' && *esc <= 'z') {
-                               value |= (*esc - 'a' + 10) << shift;
-                       } else {
-                               esc++;
-                               continue;
-                       }
-
-                       if (shift == 0) {
-                               cgbytes[cgoffset++] = value;
-                               value = 0;
-                       }
-
-                       esc++;
-               }
-
-               lcd_write_cmd(LCD_CMD_SET_CGRAM_ADDR | (cgaddr * 8));
-               for (addr = 0; addr < cgoffset; addr++)
-                       lcd_write_data(cgbytes[addr]);
-
-               /* ensures that we stop writing to CGRAM */
-               lcd_gotoxy();
-               processed = 1;
-               break;
-       }
-       case 'x':       /* gotoxy : LxXXX[yYYY]; */
-       case 'y':       /* gotoxy : LyYYY[xXXX]; */
-               if (!strchr(esc, ';'))
-                       break;
-
-               while (*esc) {
-                       if (*esc == 'x') {
-                               esc++;
-                               if (kstrtoul(esc, 10, &lcd.addr.x) < 0)
-                                       break;
-                       } else if (*esc == 'y') {
-                               esc++;
-                               if (kstrtoul(esc, 10, &lcd.addr.y) < 0)
-                                       break;
-                       } else {
-                               break;
-                       }
-               }
-
-               lcd_gotoxy();
-               processed = 1;
-               break;
-       }
-
-       /* TODO: This indent party here got ugly, clean it! */
-       /* Check whether one flag was changed */
-       if (oldflags != lcd.flags) {
-               /* check whether one of B,C,D flags were changed */
-               if ((oldflags ^ lcd.flags) &
-                   (LCD_FLAG_B | LCD_FLAG_C | LCD_FLAG_D))
-                       /* set display mode */
-                       lcd_write_cmd(LCD_CMD_DISPLAY_CTRL
-                                     | ((lcd.flags & LCD_FLAG_D)
-                                                     ? LCD_CMD_DISPLAY_ON : 0)
-                                     | ((lcd.flags & LCD_FLAG_C)
-                                                     ? LCD_CMD_CURSOR_ON : 0)
-                                     | ((lcd.flags & LCD_FLAG_B)
-                                                     ? LCD_CMD_BLINK_ON : 0));
-               /* check whether one of F,N flags was changed */
-               else if ((oldflags ^ lcd.flags) & (LCD_FLAG_F | LCD_FLAG_N))
-                       lcd_write_cmd(LCD_CMD_FUNCTION_SET
-                                     | LCD_CMD_DATA_LEN_8BITS
-                                     | ((lcd.flags & LCD_FLAG_F)
-                                                     ? LCD_CMD_TWO_LINES : 0)
-                                     | ((lcd.flags & LCD_FLAG_N)
-                                                     ? LCD_CMD_FONT_5X10_DOTS
-                                                                     : 0));
-               /* check whether L flag was changed */
-               else if ((oldflags ^ lcd.flags) & (LCD_FLAG_L)) {
-                       if (lcd.flags & (LCD_FLAG_L))
-                               lcd_backlight(1);
-                       else if (lcd.light_tempo == 0)
-                               /*
-                                * switch off the light only when the tempo
-                                * lighting is gone
-                                */
-                               lcd_backlight(0);
-               }
-       }
-
-       return processed;
-}
-
-static void lcd_write_char(char c)
-{
-       /* first, we'll test if we're in escape mode */
-       if ((c != '\n') && lcd.esc_seq.len >= 0) {
-               /* yes, let's add this char to the buffer */
-               lcd.esc_seq.buf[lcd.esc_seq.len++] = c;
-               lcd.esc_seq.buf[lcd.esc_seq.len] = 0;
-       } else {
-               /* aborts any previous escape sequence */
-               lcd.esc_seq.len = -1;
-
-               switch (c) {
-               case LCD_ESCAPE_CHAR:
-                       /* start of an escape sequence */
-                       lcd.esc_seq.len = 0;
-                       lcd.esc_seq.buf[lcd.esc_seq.len] = 0;
-                       break;
-               case '\b':
-                       /* go back one char and clear it */
-                       if (lcd.addr.x > 0) {
-                               /*
-                                * check if we're not at the
-                                * end of the line
-                                */
-                               if (lcd.addr.x < lcd.bwidth)
-                                       /* back one char */
-                                       lcd_write_cmd(LCD_CMD_SHIFT);
-                               lcd.addr.x--;
-                       }
-                       /* replace with a space */
-                       lcd_write_data(' ');
-                       /* back one char again */
-                       lcd_write_cmd(LCD_CMD_SHIFT);
-                       break;
-               case '\014':
-                       /* quickly clear the display */
-                       lcd_clear_fast();
-                       break;
-               case '\n':
-                       /*
-                        * flush the remainder of the current line and
-                        * go to the beginning of the next line
-                        */
-                       for (; lcd.addr.x < lcd.bwidth; lcd.addr.x++)
-                               lcd_write_data(' ');
-                       lcd.addr.x = 0;
-                       lcd.addr.y = (lcd.addr.y + 1) % lcd.height;
-                       lcd_gotoxy();
-                       break;
-               case '\r':
-                       /* go to the beginning of the same line */
-                       lcd.addr.x = 0;
-                       lcd_gotoxy();
-                       break;
-               case '\t':
-                       /* print a space instead of the tab */
-                       lcd_print(' ');
-                       break;
-               default:
-                       /* simply print this char */
-                       lcd_print(c);
-                       break;
-               }
-       }
-
-       /*
-        * now we'll see if we're in an escape mode and if the current
-        * escape sequence can be understood.
-        */
-       if (lcd.esc_seq.len >= 2) {
-               int processed = 0;
-
-               if (!strcmp(lcd.esc_seq.buf, "[2J")) {
-                       /* clear the display */
-                       lcd_clear_fast();
-                       processed = 1;
-               } else if (!strcmp(lcd.esc_seq.buf, "[H")) {
-                       /* cursor to home */
-                       lcd.addr.x = 0;
-                       lcd.addr.y = 0;
-                       lcd_gotoxy();
-                       processed = 1;
-               }
-               /* codes starting with ^[[L */
-               else if ((lcd.esc_seq.len >= 3) &&
-                        (lcd.esc_seq.buf[0] == '[') &&
-                        (lcd.esc_seq.buf[1] == 'L')) {
-                       processed = handle_lcd_special_code();
-               }
-
-               /* LCD special escape codes */
-               /*
-                * flush the escape sequence if it's been processed
-                * or if it is getting too long.
-                */
-               if (processed || (lcd.esc_seq.len >= LCD_ESCAPE_LEN))
-                       lcd.esc_seq.len = -1;
-       } /* escape codes */
-}
-
-static ssize_t lcd_write(struct file *file,
-                        const char __user *buf, size_t count, loff_t *ppos)
-{
-       const char __user *tmp = buf;
-       char c;
-
-       for (; count-- > 0; (*ppos)++, tmp++) {
-               if (!in_interrupt() && (((count + 1) & 0x1f) == 0))
-                       /*
-                        * let's be a little nice with other processes
-                        * that need some CPU
-                        */
-                       schedule();
-
-               if (get_user(c, tmp))
-                       return -EFAULT;
-
-               lcd_write_char(c);
-       }
-
-       return tmp - buf;
-}
-
-static int lcd_open(struct inode *inode, struct file *file)
-{
-       if (!atomic_dec_and_test(&lcd_available))
-               return -EBUSY;  /* open only once at a time */
-
-       if (file->f_mode & FMODE_READ)  /* device is write-only */
-               return -EPERM;
-
-       if (lcd.must_clear) {
-               lcd_clear_display();
-               lcd.must_clear = false;
-       }
-       return nonseekable_open(inode, file);
-}
-
-static int lcd_release(struct inode *inode, struct file *file)
-{
-       atomic_inc(&lcd_available);
-       return 0;
-}
-
-static const struct file_operations lcd_fops = {
-       .write   = lcd_write,
-       .open    = lcd_open,
-       .release = lcd_release,
-       .llseek  = no_llseek,
-};
-
-static struct miscdevice lcd_dev = {
-       .minor  = LCD_MINOR,
-       .name   = "lcd",
-       .fops   = &lcd_fops,
-};
-
-/* public function usable from the kernel for any purpose */
-static void panel_lcd_print(const char *s)
-{
-       const char *tmp = s;
-       int count = strlen(s);
-
-       if (lcd.enabled && lcd.initialized) {
-               for (; count-- > 0; tmp++) {
-                       if (!in_interrupt() && (((count + 1) & 0x1f) == 0))
-                               /*
-                                * let's be a little nice with other processes
-                                * that need some CPU
-                                */
-                               schedule();
-
-                       lcd_write_char(*tmp);
-               }
-       }
-}
-
-/* initialize the LCD driver */
-static void lcd_init(void)
-{
-       switch (selected_lcd_type) {
-       case LCD_TYPE_OLD:
-               /* parallel mode, 8 bits */
-               lcd.proto = LCD_PROTO_PARALLEL;
-               lcd.charset = LCD_CHARSET_NORMAL;
-               lcd.pins.e = PIN_STROBE;
-               lcd.pins.rs = PIN_AUTOLF;
-
-               lcd.width = 40;
-               lcd.bwidth = 40;
-               lcd.hwidth = 64;
-               lcd.height = 2;
-               break;
-       case LCD_TYPE_KS0074:
-               /* serial mode, ks0074 */
-               lcd.proto = LCD_PROTO_SERIAL;
-               lcd.charset = LCD_CHARSET_KS0074;
-               lcd.pins.bl = PIN_AUTOLF;
-               lcd.pins.cl = PIN_STROBE;
-               lcd.pins.da = PIN_D0;
-
-               lcd.width = 16;
-               lcd.bwidth = 40;
-               lcd.hwidth = 16;
-               lcd.height = 2;
-               break;
-       case LCD_TYPE_NEXCOM:
-               /* parallel mode, 8 bits, generic */
-               lcd.proto = LCD_PROTO_PARALLEL;
-               lcd.charset = LCD_CHARSET_NORMAL;
-               lcd.pins.e = PIN_AUTOLF;
-               lcd.pins.rs = PIN_SELECP;
-               lcd.pins.rw = PIN_INITP;
-
-               lcd.width = 16;
-               lcd.bwidth = 40;
-               lcd.hwidth = 64;
-               lcd.height = 2;
-               break;
-       case LCD_TYPE_CUSTOM:
-               /* customer-defined */
-               lcd.proto = DEFAULT_LCD_PROTO;
-               lcd.charset = DEFAULT_LCD_CHARSET;
-               /* default geometry will be set later */
-               break;
-       case LCD_TYPE_HANTRONIX:
-               /* parallel mode, 8 bits, hantronix-like */
-       default:
-               lcd.proto = LCD_PROTO_PARALLEL;
-               lcd.charset = LCD_CHARSET_NORMAL;
-               lcd.pins.e = PIN_STROBE;
-               lcd.pins.rs = PIN_SELECP;
-
-               lcd.width = 16;
-               lcd.bwidth = 40;
-               lcd.hwidth = 64;
-               lcd.height = 2;
-               break;
-       }
-
-       /* Overwrite with module params set on loading */
-       if (lcd_height != NOT_SET)
-               lcd.height = lcd_height;
-       if (lcd_width != NOT_SET)
-               lcd.width = lcd_width;
-       if (lcd_bwidth != NOT_SET)
-               lcd.bwidth = lcd_bwidth;
-       if (lcd_hwidth != NOT_SET)
-               lcd.hwidth = lcd_hwidth;
-       if (lcd_charset != NOT_SET)
-               lcd.charset = lcd_charset;
-       if (lcd_proto != NOT_SET)
-               lcd.proto = lcd_proto;
-       if (lcd_e_pin != PIN_NOT_SET)
-               lcd.pins.e = lcd_e_pin;
-       if (lcd_rs_pin != PIN_NOT_SET)
-               lcd.pins.rs = lcd_rs_pin;
-       if (lcd_rw_pin != PIN_NOT_SET)
-               lcd.pins.rw = lcd_rw_pin;
-       if (lcd_cl_pin != PIN_NOT_SET)
-               lcd.pins.cl = lcd_cl_pin;
-       if (lcd_da_pin != PIN_NOT_SET)
-               lcd.pins.da = lcd_da_pin;
-       if (lcd_bl_pin != PIN_NOT_SET)
-               lcd.pins.bl = lcd_bl_pin;
-
-       /* this is used to catch wrong and default values */
-       if (lcd.width <= 0)
-               lcd.width = DEFAULT_LCD_WIDTH;
-       if (lcd.bwidth <= 0)
-               lcd.bwidth = DEFAULT_LCD_BWIDTH;
-       if (lcd.hwidth <= 0)
-               lcd.hwidth = DEFAULT_LCD_HWIDTH;
-       if (lcd.height <= 0)
-               lcd.height = DEFAULT_LCD_HEIGHT;
-
-       if (lcd.proto == LCD_PROTO_SERIAL) {    /* SERIAL */
-               lcd_write_cmd = lcd_write_cmd_s;
-               lcd_write_data = lcd_write_data_s;
-               lcd_clear_fast = lcd_clear_fast_s;
-
-               if (lcd.pins.cl == PIN_NOT_SET)
-                       lcd.pins.cl = DEFAULT_LCD_PIN_SCL;
-               if (lcd.pins.da == PIN_NOT_SET)
-                       lcd.pins.da = DEFAULT_LCD_PIN_SDA;
-
-       } else if (lcd.proto == LCD_PROTO_PARALLEL) {   /* PARALLEL */
-               lcd_write_cmd = lcd_write_cmd_p8;
-               lcd_write_data = lcd_write_data_p8;
-               lcd_clear_fast = lcd_clear_fast_p8;
-
-               if (lcd.pins.e == PIN_NOT_SET)
-                       lcd.pins.e = DEFAULT_LCD_PIN_E;
-               if (lcd.pins.rs == PIN_NOT_SET)
-                       lcd.pins.rs = DEFAULT_LCD_PIN_RS;
-               if (lcd.pins.rw == PIN_NOT_SET)
-                       lcd.pins.rw = DEFAULT_LCD_PIN_RW;
-       } else {
-               lcd_write_cmd = lcd_write_cmd_tilcd;
-               lcd_write_data = lcd_write_data_tilcd;
-               lcd_clear_fast = lcd_clear_fast_tilcd;
-       }
-
-       if (lcd.pins.bl == PIN_NOT_SET)
-               lcd.pins.bl = DEFAULT_LCD_PIN_BL;
-
-       if (lcd.pins.e == PIN_NOT_SET)
-               lcd.pins.e = PIN_NONE;
-       if (lcd.pins.rs == PIN_NOT_SET)
-               lcd.pins.rs = PIN_NONE;
-       if (lcd.pins.rw == PIN_NOT_SET)
-               lcd.pins.rw = PIN_NONE;
-       if (lcd.pins.bl == PIN_NOT_SET)
-               lcd.pins.bl = PIN_NONE;
-       if (lcd.pins.cl == PIN_NOT_SET)
-               lcd.pins.cl = PIN_NONE;
-       if (lcd.pins.da == PIN_NOT_SET)
-               lcd.pins.da = PIN_NONE;
-
-       if (lcd.charset == NOT_SET)
-               lcd.charset = DEFAULT_LCD_CHARSET;
-
-       if (lcd.charset == LCD_CHARSET_KS0074)
-               lcd_char_conv = lcd_char_conv_ks0074;
-       else
-               lcd_char_conv = NULL;
-
-       if (lcd.pins.bl != PIN_NONE)
-               init_scan_timer();
-
-       pin_to_bits(lcd.pins.e, lcd_bits[LCD_PORT_D][LCD_BIT_E],
-                   lcd_bits[LCD_PORT_C][LCD_BIT_E]);
-       pin_to_bits(lcd.pins.rs, lcd_bits[LCD_PORT_D][LCD_BIT_RS],
-                   lcd_bits[LCD_PORT_C][LCD_BIT_RS]);
-       pin_to_bits(lcd.pins.rw, lcd_bits[LCD_PORT_D][LCD_BIT_RW],
-                   lcd_bits[LCD_PORT_C][LCD_BIT_RW]);
-       pin_to_bits(lcd.pins.bl, lcd_bits[LCD_PORT_D][LCD_BIT_BL],
-                   lcd_bits[LCD_PORT_C][LCD_BIT_BL]);
-       pin_to_bits(lcd.pins.cl, lcd_bits[LCD_PORT_D][LCD_BIT_CL],
-                   lcd_bits[LCD_PORT_C][LCD_BIT_CL]);
-       pin_to_bits(lcd.pins.da, lcd_bits[LCD_PORT_D][LCD_BIT_DA],
-                   lcd_bits[LCD_PORT_C][LCD_BIT_DA]);
-
-       /*
-        * before this line, we must NOT send anything to the display.
-        * Since lcd_init_display() needs to write data, we have to
-        * enable mark the LCD initialized just before.
-        */
-       lcd.initialized = true;
-       lcd_init_display();
-
-       /* display a short message */
-#ifdef CONFIG_PANEL_CHANGE_MESSAGE
-#ifdef CONFIG_PANEL_BOOT_MESSAGE
-       panel_lcd_print("\x1b[Lc\x1b[Lb\x1b[L*" CONFIG_PANEL_BOOT_MESSAGE);
-#endif
-#else
-       panel_lcd_print("\x1b[Lc\x1b[Lb\x1b[L*Linux-" UTS_RELEASE "\nPanel-"
-                       PANEL_VERSION);
-#endif
-       lcd.addr.x = 0;
-       lcd.addr.y = 0;
-       /* clear the display on the next device opening */
-       lcd.must_clear = true;
-       lcd_gotoxy();
-}
-
-/*
- * These are the file operation function for user access to /dev/keypad
- */
-
-static ssize_t keypad_read(struct file *file,
-                          char __user *buf, size_t count, loff_t *ppos)
-{
-       unsigned i = *ppos;
-       char __user *tmp = buf;
-
-       if (keypad_buflen == 0) {
-               if (file->f_flags & O_NONBLOCK)
-                       return -EAGAIN;
-
-               if (wait_event_interruptible(keypad_read_wait,
-                                            keypad_buflen != 0))
-                       return -EINTR;
-       }
-
-       for (; count-- > 0 && (keypad_buflen > 0);
-            ++i, ++tmp, --keypad_buflen) {
-               put_user(keypad_buffer[keypad_start], tmp);
-               keypad_start = (keypad_start + 1) % KEYPAD_BUFFER;
-       }
-       *ppos = i;
-
-       return tmp - buf;
-}
-
-static int keypad_open(struct inode *inode, struct file *file)
-{
-       if (!atomic_dec_and_test(&keypad_available))
-               return -EBUSY;  /* open only once at a time */
-
-       if (file->f_mode & FMODE_WRITE) /* device is read-only */
-               return -EPERM;
-
-       keypad_buflen = 0;      /* flush the buffer on opening */
-       return 0;
-}
-
-static int keypad_release(struct inode *inode, struct file *file)
-{
-       atomic_inc(&keypad_available);
-       return 0;
-}
-
-static const struct file_operations keypad_fops = {
-       .read    = keypad_read,         /* read */
-       .open    = keypad_open,         /* open */
-       .release = keypad_release,      /* close */
-       .llseek  = default_llseek,
-};
-
-static struct miscdevice keypad_dev = {
-       .minor  = KEYPAD_MINOR,
-       .name   = "keypad",
-       .fops   = &keypad_fops,
-};
-
-static void keypad_send_key(const char *string, int max_len)
-{
-       /* send the key to the device only if a process is attached to it. */
-       if (!atomic_read(&keypad_available)) {
-               while (max_len-- && keypad_buflen < KEYPAD_BUFFER && *string) {
-                       keypad_buffer[(keypad_start + keypad_buflen++) %
-                                     KEYPAD_BUFFER] = *string++;
-               }
-               wake_up_interruptible(&keypad_read_wait);
-       }
-}
-
-/* this function scans all the bits involving at least one logical signal,
- * and puts the results in the bitfield "phys_read" (one bit per established
- * contact), and sets "phys_read_prev" to "phys_read".
- *
- * Note: to debounce input signals, we will only consider as switched a signal
- * which is stable across 2 measures. Signals which are different between two
- * reads will be kept as they previously were in their logical form (phys_prev).
- * A signal which has just switched will have a 1 in
- * (phys_read ^ phys_read_prev).
- */
-static void phys_scan_contacts(void)
-{
-       int bit, bitval;
-       char oldval;
-       char bitmask;
-       char gndmask;
-
-       phys_prev = phys_curr;
-       phys_read_prev = phys_read;
-       phys_read = 0;          /* flush all signals */
-
-       /* keep track of old value, with all outputs disabled */
-       oldval = r_dtr(pprt) | scan_mask_o;
-       /* activate all keyboard outputs (active low) */
-       w_dtr(pprt, oldval & ~scan_mask_o);
-
-       /* will have a 1 for each bit set to gnd */
-       bitmask = PNL_PINPUT(r_str(pprt)) & scan_mask_i;
-       /* disable all matrix signals */
-       w_dtr(pprt, oldval);
-
-       /* now that all outputs are cleared, the only active input bits are
-        * directly connected to the ground
-        */
-
-       /* 1 for each grounded input */
-       gndmask = PNL_PINPUT(r_str(pprt)) & scan_mask_i;
-
-       /* grounded inputs are signals 40-44 */
-       phys_read |= (__u64)gndmask << 40;
-
-       if (bitmask != gndmask) {
-               /*
-                * since clearing the outputs changed some inputs, we know
-                * that some input signals are currently tied to some outputs.
-                * So we'll scan them.
-                */
-               for (bit = 0; bit < 8; bit++) {
-                       bitval = BIT(bit);
-
-                       if (!(scan_mask_o & bitval))    /* skip unused bits */
-                               continue;
-
-                       w_dtr(pprt, oldval & ~bitval);  /* enable this output */
-                       bitmask = PNL_PINPUT(r_str(pprt)) & ~gndmask;
-                       phys_read |= (__u64)bitmask << (5 * bit);
-               }
-               w_dtr(pprt, oldval);    /* disable all outputs */
-       }
-       /*
-        * this is easy: use old bits when they are flapping,
-        * use new ones when stable
-        */
-       phys_curr = (phys_prev & (phys_read ^ phys_read_prev)) |
-                   (phys_read & ~(phys_read ^ phys_read_prev));
-}
-
-static inline int input_state_high(struct logical_input *input)
-{
-#if 0
-       /* FIXME:
-        * this is an invalid test. It tries to catch
-        * transitions from single-key to multiple-key, but
-        * doesn't take into account the contacts polarity.
-        * The only solution to the problem is to parse keys
-        * from the most complex to the simplest combinations,
-        * and mark them as 'caught' once a combination
-        * matches, then unmatch it for all other ones.
-        */
-
-       /* try to catch dangerous transitions cases :
-        * someone adds a bit, so this signal was a false
-        * positive resulting from a transition. We should
-        * invalidate the signal immediately and not call the
-        * release function.
-        * eg: 0 -(press A)-> A -(press B)-> AB : don't match A's release.
-        */
-       if (((phys_prev & input->mask) == input->value) &&
-           ((phys_curr & input->mask) >  input->value)) {
-               input->state = INPUT_ST_LOW; /* invalidate */
-               return 1;
-       }
-#endif
-
-       if ((phys_curr & input->mask) == input->value) {
-               if ((input->type == INPUT_TYPE_STD) &&
-                   (input->high_timer == 0)) {
-                       input->high_timer++;
-                       if (input->u.std.press_fct)
-                               input->u.std.press_fct(input->u.std.press_data);
-               } else if (input->type == INPUT_TYPE_KBD) {
-                       /* will turn on the light */
-                       keypressed = 1;
-
-                       if (input->high_timer == 0) {
-                               char *press_str = input->u.kbd.press_str;
-
-                               if (press_str[0]) {
-                                       int s = sizeof(input->u.kbd.press_str);
-
-                                       keypad_send_key(press_str, s);
-                               }
-                       }
-
-                       if (input->u.kbd.repeat_str[0]) {
-                               char *repeat_str = input->u.kbd.repeat_str;
-
-                               if (input->high_timer >= KEYPAD_REP_START) {
-                                       int s = sizeof(input->u.kbd.repeat_str);
-
-                                       input->high_timer -= KEYPAD_REP_DELAY;
-                                       keypad_send_key(repeat_str, s);
-                               }
-                               /* we will need to come back here soon */
-                               inputs_stable = 0;
-                       }
-
-                       if (input->high_timer < 255)
-                               input->high_timer++;
-               }
-               return 1;
-       }
-
-       /* else signal falling down. Let's fall through. */
-       input->state = INPUT_ST_FALLING;
-       input->fall_timer = 0;
-
-       return 0;
-}
-
-static inline void input_state_falling(struct logical_input *input)
-{
-#if 0
-       /* FIXME !!! same comment as in input_state_high */
-       if (((phys_prev & input->mask) == input->value) &&
-           ((phys_curr & input->mask) >  input->value)) {
-               input->state = INPUT_ST_LOW;    /* invalidate */
-               return;
-       }
-#endif
-
-       if ((phys_curr & input->mask) == input->value) {
-               if (input->type == INPUT_TYPE_KBD) {
-                       /* will turn on the light */
-                       keypressed = 1;
-
-                       if (input->u.kbd.repeat_str[0]) {
-                               char *repeat_str = input->u.kbd.repeat_str;
-
-                               if (input->high_timer >= KEYPAD_REP_START) {
-                                       int s = sizeof(input->u.kbd.repeat_str);
-
-                                       input->high_timer -= KEYPAD_REP_DELAY;
-                                       keypad_send_key(repeat_str, s);
-                               }
-                               /* we will need to come back here soon */
-                               inputs_stable = 0;
-                       }
-
-                       if (input->high_timer < 255)
-                               input->high_timer++;
-               }
-               input->state = INPUT_ST_HIGH;
-       } else if (input->fall_timer >= input->fall_time) {
-               /* call release event */
-               if (input->type == INPUT_TYPE_STD) {
-                       void (*release_fct)(int) = input->u.std.release_fct;
-
-                       if (release_fct)
-                               release_fct(input->u.std.release_data);
-               } else if (input->type == INPUT_TYPE_KBD) {
-                       char *release_str = input->u.kbd.release_str;
-
-                       if (release_str[0]) {
-                               int s = sizeof(input->u.kbd.release_str);
-
-                               keypad_send_key(release_str, s);
-                       }
-               }
-
-               input->state = INPUT_ST_LOW;
-       } else {
-               input->fall_timer++;
-               inputs_stable = 0;
-       }
-}
-
-static void panel_process_inputs(void)
-{
-       struct list_head *item;
-       struct logical_input *input;
-
-       keypressed = 0;
-       inputs_stable = 1;
-       list_for_each(item, &logical_inputs) {
-               input = list_entry(item, struct logical_input, list);
-
-               switch (input->state) {
-               case INPUT_ST_LOW:
-                       if ((phys_curr & input->mask) != input->value)
-                               break;
-                       /* if all needed ones were already set previously,
-                        * this means that this logical signal has been
-                        * activated by the releasing of another combined
-                        * signal, so we don't want to match.
-                        * eg: AB -(release B)-> A -(release A)-> 0 :
-                        *     don't match A.
-                        */
-                       if ((phys_prev & input->mask) == input->value)
-                               break;
-                       input->rise_timer = 0;
-                       input->state = INPUT_ST_RISING;
-                       /* no break here, fall through */
-               case INPUT_ST_RISING:
-                       if ((phys_curr & input->mask) != input->value) {
-                               input->state = INPUT_ST_LOW;
-                               break;
-                       }
-                       if (input->rise_timer < input->rise_time) {
-                               inputs_stable = 0;
-                               input->rise_timer++;
-                               break;
-                       }
-                       input->high_timer = 0;
-                       input->state = INPUT_ST_HIGH;
-                       /* no break here, fall through */
-               case INPUT_ST_HIGH:
-                       if (input_state_high(input))
-                               break;
-                       /* no break here, fall through */
-               case INPUT_ST_FALLING:
-                       input_state_falling(input);
-               }
-       }
-}
-
-static void panel_scan_timer(void)
-{
-       if (keypad.enabled && keypad_initialized) {
-               if (spin_trylock_irq(&pprt_lock)) {
-                       phys_scan_contacts();
-
-                       /* no need for the parport anymore */
-                       spin_unlock_irq(&pprt_lock);
-               }
-
-               if (!inputs_stable || phys_curr != phys_prev)
-                       panel_process_inputs();
-       }
-
-       if (lcd.enabled && lcd.initialized) {
-               if (keypressed) {
-                       if (lcd.light_tempo == 0 &&
-                           ((lcd.flags & LCD_FLAG_L) == 0))
-                               lcd_backlight(1);
-                       lcd.light_tempo = FLASH_LIGHT_TEMPO;
-               } else if (lcd.light_tempo > 0) {
-                       lcd.light_tempo--;
-                       if (lcd.light_tempo == 0 &&
-                           ((lcd.flags & LCD_FLAG_L) == 0))
-                               lcd_backlight(0);
-               }
-       }
-
-       mod_timer(&scan_timer, jiffies + INPUT_POLL_TIME);
-}
-
-static void init_scan_timer(void)
-{
-       if (scan_timer.function)
-               return;         /* already started */
-
-       setup_timer(&scan_timer, (void *)&panel_scan_timer, 0);
-       scan_timer.expires = jiffies + INPUT_POLL_TIME;
-       add_timer(&scan_timer);
-}
-
-/* converts a name of the form "({BbAaPpSsEe}{01234567-})*" to a series of bits.
- * if <omask> or <imask> are non-null, they will be or'ed with the bits
- * corresponding to out and in bits respectively.
- * returns 1 if ok, 0 if error (in which case, nothing is written).
- */
-static u8 input_name2mask(const char *name, __u64 *mask, __u64 *value,
-                         u8 *imask, u8 *omask)
-{
-       const char sigtab[] = "EeSsPpAaBb";
-       u8 im, om;
-       __u64 m, v;
-
-       om = 0;
-       im = 0;
-       m = 0ULL;
-       v = 0ULL;
-       while (*name) {
-               int in, out, bit, neg;
-               const char *idx;
-
-               idx = strchr(sigtab, *name);
-               if (!idx)
-                       return 0;       /* input name not found */
-
-               in = idx - sigtab;
-               neg = (in & 1); /* odd (lower) names are negated */
-               in >>= 1;
-               im |= BIT(in);
-
-               name++;
-               if (*name >= '0' && *name <= '7') {
-                       out = *name - '0';
-                       om |= BIT(out);
-               } else if (*name == '-') {
-                       out = 8;
-               } else {
-                       return 0;       /* unknown bit name */
-               }
-
-               bit = (out * 5) + in;
-
-               m |= 1ULL << bit;
-               if (!neg)
-                       v |= 1ULL << bit;
-               name++;
-       }
-       *mask = m;
-       *value = v;
-       if (imask)
-               *imask |= im;
-       if (omask)
-               *omask |= om;
-       return 1;
-}
-
-/* tries to bind a key to the signal name <name>. The key will send the
- * strings <press>, <repeat>, <release> for these respective events.
- * Returns the pointer to the new key if ok, NULL if the key could not be bound.
- */
-static struct logical_input *panel_bind_key(const char *name, const char *press,
-                                           const char *repeat,
-                                           const char *release)
-{
-       struct logical_input *key;
-
-       key = kzalloc(sizeof(*key), GFP_KERNEL);
-       if (!key)
-               return NULL;
-
-       if (!input_name2mask(name, &key->mask, &key->value, &scan_mask_i,
-                            &scan_mask_o)) {
-               kfree(key);
-               return NULL;
-       }
-
-       key->type = INPUT_TYPE_KBD;
-       key->state = INPUT_ST_LOW;
-       key->rise_time = 1;
-       key->fall_time = 1;
-
-       strncpy(key->u.kbd.press_str, press, sizeof(key->u.kbd.press_str));
-       strncpy(key->u.kbd.repeat_str, repeat, sizeof(key->u.kbd.repeat_str));
-       strncpy(key->u.kbd.release_str, release,
-               sizeof(key->u.kbd.release_str));
-       list_add(&key->list, &logical_inputs);
-       return key;
-}
-
-#if 0
-/* tries to bind a callback function to the signal name <name>. The function
- * <press_fct> will be called with the <press_data> arg when the signal is
- * activated, and so on for <release_fct>/<release_data>
- * Returns the pointer to the new signal if ok, NULL if the signal could not
- * be bound.
- */
-static struct logical_input *panel_bind_callback(char *name,
-                                                void (*press_fct)(int),
-                                                int press_data,
-                                                void (*release_fct)(int),
-                                                int release_data)
-{
-       struct logical_input *callback;
-
-       callback = kmalloc(sizeof(*callback), GFP_KERNEL);
-       if (!callback)
-               return NULL;
-
-       memset(callback, 0, sizeof(struct logical_input));
-       if (!input_name2mask(name, &callback->mask, &callback->value,
-                            &scan_mask_i, &scan_mask_o))
-               return NULL;
-
-       callback->type = INPUT_TYPE_STD;
-       callback->state = INPUT_ST_LOW;
-       callback->rise_time = 1;
-       callback->fall_time = 1;
-       callback->u.std.press_fct = press_fct;
-       callback->u.std.press_data = press_data;
-       callback->u.std.release_fct = release_fct;
-       callback->u.std.release_data = release_data;
-       list_add(&callback->list, &logical_inputs);
-       return callback;
-}
-#endif
-
-static void keypad_init(void)
-{
-       int keynum;
-
-       init_waitqueue_head(&keypad_read_wait);
-       keypad_buflen = 0;      /* flushes any eventual noisy keystroke */
-
-       /* Let's create all known keys */
-
-       for (keynum = 0; keypad_profile[keynum][0][0]; keynum++) {
-               panel_bind_key(keypad_profile[keynum][0],
-                              keypad_profile[keynum][1],
-                              keypad_profile[keynum][2],
-                              keypad_profile[keynum][3]);
-       }
-
-       init_scan_timer();
-       keypad_initialized = 1;
-}
-
-/**************************************************/
-/* device initialization                          */
-/**************************************************/
-
-static int panel_notify_sys(struct notifier_block *this, unsigned long code,
-                           void *unused)
-{
-       if (lcd.enabled && lcd.initialized) {
-               switch (code) {
-               case SYS_DOWN:
-                       panel_lcd_print
-                           ("\x0cReloading\nSystem...\x1b[Lc\x1b[Lb\x1b[L+");
-                       break;
-               case SYS_HALT:
-                       panel_lcd_print
-                           ("\x0cSystem Halted.\x1b[Lc\x1b[Lb\x1b[L+");
-                       break;
-               case SYS_POWER_OFF:
-                       panel_lcd_print("\x0cPower off.\x1b[Lc\x1b[Lb\x1b[L+");
-                       break;
-               default:
-                       break;
-               }
-       }
-       return NOTIFY_DONE;
-}
-
-static struct notifier_block panel_notifier = {
-       panel_notify_sys,
-       NULL,
-       0
-};
-
-static void panel_attach(struct parport *port)
-{
-       struct pardev_cb panel_cb;
-
-       if (port->number != parport)
-               return;
-
-       if (pprt) {
-               pr_err("%s: port->number=%d parport=%d, already registered!\n",
-                      __func__, port->number, parport);
-               return;
-       }
-
-       memset(&panel_cb, 0, sizeof(panel_cb));
-       panel_cb.private = &pprt;
-       /* panel_cb.flags = 0 should be PARPORT_DEV_EXCL? */
-
-       pprt = parport_register_dev_model(port, "panel", &panel_cb, 0);
-       if (!pprt) {
-               pr_err("%s: port->number=%d parport=%d, parport_register_device() failed\n",
-                      __func__, port->number, parport);
-               return;
-       }
-
-       if (parport_claim(pprt)) {
-               pr_err("could not claim access to parport%d. Aborting.\n",
-                      parport);
-               goto err_unreg_device;
-       }
-
-       /* must init LCD first, just in case an IRQ from the keypad is
-        * generated at keypad init
-        */
-       if (lcd.enabled) {
-               lcd_init();
-               if (misc_register(&lcd_dev))
-                       goto err_unreg_device;
-       }
-
-       if (keypad.enabled) {
-               keypad_init();
-               if (misc_register(&keypad_dev))
-                       goto err_lcd_unreg;
-       }
-       register_reboot_notifier(&panel_notifier);
-       return;
-
-err_lcd_unreg:
-       if (lcd.enabled)
-               misc_deregister(&lcd_dev);
-err_unreg_device:
-       parport_unregister_device(pprt);
-       pprt = NULL;
-}
-
-static void panel_detach(struct parport *port)
-{
-       if (port->number != parport)
-               return;
-
-       if (!pprt) {
-               pr_err("%s: port->number=%d parport=%d, nothing to unregister.\n",
-                      __func__, port->number, parport);
-               return;
-       }
-       if (scan_timer.function)
-               del_timer_sync(&scan_timer);
-
-       if (pprt) {
-               if (keypad.enabled) {
-                       misc_deregister(&keypad_dev);
-                       keypad_initialized = 0;
-               }
-
-               if (lcd.enabled) {
-                       panel_lcd_print("\x0cLCD driver " PANEL_VERSION
-                                       "\nunloaded.\x1b[Lc\x1b[Lb\x1b[L-");
-                       misc_deregister(&lcd_dev);
-                       lcd.initialized = false;
-               }
-
-               /* TODO: free all input signals */
-               parport_release(pprt);
-               parport_unregister_device(pprt);
-               pprt = NULL;
-               unregister_reboot_notifier(&panel_notifier);
-       }
-}
-
-static struct parport_driver panel_driver = {
-       .name = "panel",
-       .match_port = panel_attach,
-       .detach = panel_detach,
-       .devmodel = true,
-};
-
-/* init function */
-static int __init panel_init_module(void)
-{
-       int selected_keypad_type = NOT_SET, err;
-
-       /* take care of an eventual profile */
-       switch (profile) {
-       case PANEL_PROFILE_CUSTOM:
-               /* custom profile */
-               selected_keypad_type = DEFAULT_KEYPAD_TYPE;
-               selected_lcd_type = DEFAULT_LCD_TYPE;
-               break;
-       case PANEL_PROFILE_OLD:
-               /* 8 bits, 2*16, old keypad */
-               selected_keypad_type = KEYPAD_TYPE_OLD;
-               selected_lcd_type = LCD_TYPE_OLD;
-
-               /* TODO: This two are a little hacky, sort it out later */
-               if (lcd_width == NOT_SET)
-                       lcd_width = 16;
-               if (lcd_hwidth == NOT_SET)
-                       lcd_hwidth = 16;
-               break;
-       case PANEL_PROFILE_NEW:
-               /* serial, 2*16, new keypad */
-               selected_keypad_type = KEYPAD_TYPE_NEW;
-               selected_lcd_type = LCD_TYPE_KS0074;
-               break;
-       case PANEL_PROFILE_HANTRONIX:
-               /* 8 bits, 2*16 hantronix-like, no keypad */
-               selected_keypad_type = KEYPAD_TYPE_NONE;
-               selected_lcd_type = LCD_TYPE_HANTRONIX;
-               break;
-       case PANEL_PROFILE_NEXCOM:
-               /* generic 8 bits, 2*16, nexcom keypad, eg. Nexcom. */
-               selected_keypad_type = KEYPAD_TYPE_NEXCOM;
-               selected_lcd_type = LCD_TYPE_NEXCOM;
-               break;
-       case PANEL_PROFILE_LARGE:
-               /* 8 bits, 2*40, old keypad */
-               selected_keypad_type = KEYPAD_TYPE_OLD;
-               selected_lcd_type = LCD_TYPE_OLD;
-               break;
-       }
-
-       /*
-        * Overwrite selection with module param values (both keypad and lcd),
-        * where the deprecated params have lower prio.
-        */
-       if (keypad_enabled != NOT_SET)
-               selected_keypad_type = keypad_enabled;
-       if (keypad_type != NOT_SET)
-               selected_keypad_type = keypad_type;
-
-       keypad.enabled = (selected_keypad_type > 0);
-
-       if (lcd_enabled != NOT_SET)
-               selected_lcd_type = lcd_enabled;
-       if (lcd_type != NOT_SET)
-               selected_lcd_type = lcd_type;
-
-       lcd.enabled = (selected_lcd_type > 0);
-
-       if (lcd.enabled) {
-               /*
-                * Init lcd struct with load-time values to preserve exact
-                * current functionality (at least for now).
-                */
-               lcd.height = lcd_height;
-               lcd.width = lcd_width;
-               lcd.bwidth = lcd_bwidth;
-               lcd.hwidth = lcd_hwidth;
-               lcd.charset = lcd_charset;
-               lcd.proto = lcd_proto;
-               lcd.pins.e = lcd_e_pin;
-               lcd.pins.rs = lcd_rs_pin;
-               lcd.pins.rw = lcd_rw_pin;
-               lcd.pins.cl = lcd_cl_pin;
-               lcd.pins.da = lcd_da_pin;
-               lcd.pins.bl = lcd_bl_pin;
-
-               /* Leave it for now, just in case */
-               lcd.esc_seq.len = -1;
-       }
-
-       switch (selected_keypad_type) {
-       case KEYPAD_TYPE_OLD:
-               keypad_profile = old_keypad_profile;
-               break;
-       case KEYPAD_TYPE_NEW:
-               keypad_profile = new_keypad_profile;
-               break;
-       case KEYPAD_TYPE_NEXCOM:
-               keypad_profile = nexcom_keypad_profile;
-               break;
-       default:
-               keypad_profile = NULL;
-               break;
-       }
-
-       if (!lcd.enabled && !keypad.enabled) {
-               /* no device enabled, let's exit */
-               pr_err("driver version " PANEL_VERSION " disabled.\n");
-               return -ENODEV;
-       }
-
-       err = parport_register_driver(&panel_driver);
-       if (err) {
-               pr_err("could not register with parport. Aborting.\n");
-               return err;
-       }
-
-       if (pprt)
-               pr_info("driver version " PANEL_VERSION
-                       " registered on parport%d (io=0x%lx).\n", parport,
-                       pprt->port->base);
-       else
-               pr_info("driver version " PANEL_VERSION
-                       " not yet registered\n");
-       return 0;
-}
-
-static void __exit panel_cleanup_module(void)
-{
-       parport_unregister_driver(&panel_driver);
-}
-
-module_init(panel_init_module);
-module_exit(panel_cleanup_module);
-MODULE_AUTHOR("Willy Tarreau");
-MODULE_LICENSE("GPL");
-
-/*
- * Local variables:
- *  c-indent-level: 4
- *  tab-width: 8
- * End:
- */