Commit | Line | Data |
---|---|---|
7005b584 | 1 | /* |
698b1515 WT |
2 | * Front panel driver for Linux |
3 | * Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu> | |
7005b584 | 4 | * |
698b1515 WT |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License | |
7 | * as published by the Free Software Foundation; either version | |
8 | * 2 of the License, or (at your option) any later version. | |
7005b584 | 9 | * |
698b1515 WT |
10 | * This code drives an LCD module (/dev/lcd), and a keypad (/dev/keypad) |
11 | * connected to a parallel printer port. | |
7005b584 | 12 | * |
698b1515 WT |
13 | * The LCD module may either be an HD44780-like 8-bit parallel LCD, or a 1-bit |
14 | * serial module compatible with Samsung's KS0074. The pins may be connected in | |
15 | * any combination, everything is programmable. | |
7005b584 | 16 | * |
698b1515 WT |
17 | * The keypad consists in a matrix of push buttons connecting input pins to |
18 | * data output pins or to the ground. The combinations have to be hard-coded | |
19 | * in the driver, though several profiles exist and adding new ones is easy. | |
7005b584 | 20 | * |
698b1515 WT |
21 | * Several profiles are provided for commonly found LCD+keypad modules on the |
22 | * market, such as those found in Nexcom's appliances. | |
7005b584 WT |
23 | * |
24 | * FIXME: | |
25 | * - the initialization/deinitialization process is very dirty and should | |
26 | * be rewritten. It may even be buggy. | |
27 | * | |
28 | * TODO: | |
29 | * - document 24 keys keyboard (3 rows of 8 cols, 32 diodes + 2 inputs) | |
30 | * - make the LCD a part of a virtual screen of Vx*Vy | |
31 | * - make the inputs list smp-safe | |
32 | * - change the keyboard to a double mapping : signals -> key_id -> values | |
33 | * so that applications can change values without knowing signals | |
34 | * | |
35 | */ | |
36 | ||
493aa896 TY |
37 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
38 | ||
7005b584 WT |
39 | #include <linux/module.h> |
40 | ||
41 | #include <linux/types.h> | |
42 | #include <linux/errno.h> | |
43 | #include <linux/signal.h> | |
44 | #include <linux/sched.h> | |
45 | #include <linux/spinlock.h> | |
7005b584 WT |
46 | #include <linux/interrupt.h> |
47 | #include <linux/miscdevice.h> | |
698b1515 | 48 | #include <linux/slab.h> |
7005b584 WT |
49 | #include <linux/ioport.h> |
50 | #include <linux/fcntl.h> | |
51 | #include <linux/init.h> | |
52 | #include <linux/delay.h> | |
d85170ed | 53 | #include <linux/kernel.h> |
7005b584 WT |
54 | #include <linux/ctype.h> |
55 | #include <linux/parport.h> | |
7005b584 WT |
56 | #include <linux/list.h> |
57 | #include <linux/notifier.h> | |
58 | #include <linux/reboot.h> | |
273b281f | 59 | #include <generated/utsrelease.h> |
7005b584 | 60 | |
698b1515 | 61 | #include <linux/io.h> |
48f658bb | 62 | #include <linux/uaccess.h> |
7005b584 | 63 | |
7005b584 WT |
64 | #define LCD_MINOR 156 |
65 | #define KEYPAD_MINOR 185 | |
7005b584 | 66 | |
7005b584 WT |
67 | #define LCD_MAXBYTES 256 /* max burst write */ |
68 | ||
7005b584 | 69 | #define KEYPAD_BUFFER 64 |
7005b584 | 70 | |
429ccf05 | 71 | /* poll the keyboard this every second */ |
2b3c9eb2 | 72 | #define INPUT_POLL_TIME (HZ / 50) |
429ccf05 HH |
73 | /* a key starts to repeat after this times INPUT_POLL_TIME */ |
74 | #define KEYPAD_REP_START (10) | |
75 | /* a key repeats this times INPUT_POLL_TIME */ | |
76 | #define KEYPAD_REP_DELAY (2) | |
77 | ||
78 | /* keep the light on this times INPUT_POLL_TIME for each flash */ | |
79 | #define FLASH_LIGHT_TEMPO (200) | |
7005b584 WT |
80 | |
81 | /* converts an r_str() input to an active high, bits string : 000BAOSE */ | |
82 | #define PNL_PINPUT(a) ((((unsigned char)(a)) ^ 0x7F) >> 3) | |
83 | ||
698b1515 WT |
84 | #define PNL_PBUSY 0x80 /* inverted input, active low */ |
85 | #define PNL_PACK 0x40 /* direct input, active low */ | |
86 | #define PNL_POUTPA 0x20 /* direct input, active high */ | |
87 | #define PNL_PSELECD 0x10 /* direct input, active high */ | |
88 | #define PNL_PERRORP 0x08 /* direct input, active low */ | |
7005b584 | 89 | |
698b1515 | 90 | #define PNL_PBIDIR 0x20 /* bi-directional ports */ |
429ccf05 HH |
91 | /* high to read data in or-ed with data out */ |
92 | #define PNL_PINTEN 0x10 | |
698b1515 WT |
93 | #define PNL_PSELECP 0x08 /* inverted output, active low */ |
94 | #define PNL_PINITP 0x04 /* direct output, active low */ | |
95 | #define PNL_PAUTOLF 0x02 /* inverted output, active low */ | |
96 | #define PNL_PSTROBE 0x01 /* inverted output */ | |
7005b584 WT |
97 | |
98 | #define PNL_PD0 0x01 | |
99 | #define PNL_PD1 0x02 | |
100 | #define PNL_PD2 0x04 | |
101 | #define PNL_PD3 0x08 | |
102 | #define PNL_PD4 0x10 | |
103 | #define PNL_PD5 0x20 | |
104 | #define PNL_PD6 0x40 | |
105 | #define PNL_PD7 0x80 | |
106 | ||
107 | #define PIN_NONE 0 | |
108 | #define PIN_STROBE 1 | |
109 | #define PIN_D0 2 | |
110 | #define PIN_D1 3 | |
111 | #define PIN_D2 4 | |
112 | #define PIN_D3 5 | |
113 | #define PIN_D4 6 | |
114 | #define PIN_D5 7 | |
115 | #define PIN_D6 8 | |
116 | #define PIN_D7 9 | |
117 | #define PIN_AUTOLF 14 | |
118 | #define PIN_INITP 16 | |
119 | #define PIN_SELECP 17 | |
120 | #define PIN_NOT_SET 127 | |
121 | ||
7005b584 WT |
122 | #define LCD_FLAG_B 0x0004 /* blink on */ |
123 | #define LCD_FLAG_C 0x0008 /* cursor on */ | |
124 | #define LCD_FLAG_D 0x0010 /* display on */ | |
125 | #define LCD_FLAG_F 0x0020 /* large font mode */ | |
126 | #define LCD_FLAG_N 0x0040 /* 2-rows mode */ | |
127 | #define LCD_FLAG_L 0x0080 /* backlight enabled */ | |
128 | ||
2114924a MG |
129 | /* LCD commands */ |
130 | #define LCD_CMD_DISPLAY_CLEAR 0x01 /* Clear entire display */ | |
131 | ||
132 | #define LCD_CMD_ENTRY_MODE 0x04 /* Set entry mode */ | |
133 | #define LCD_CMD_CURSOR_INC 0x02 /* Increment cursor */ | |
134 | ||
135 | #define LCD_CMD_DISPLAY_CTRL 0x08 /* Display control */ | |
136 | #define LCD_CMD_DISPLAY_ON 0x04 /* Set display on */ | |
137 | #define LCD_CMD_CURSOR_ON 0x02 /* Set cursor on */ | |
138 | #define LCD_CMD_BLINK_ON 0x01 /* Set blink on */ | |
139 | ||
140 | #define LCD_CMD_SHIFT 0x10 /* Shift cursor/display */ | |
141 | #define LCD_CMD_DISPLAY_SHIFT 0x08 /* Shift display instead of cursor */ | |
142 | #define LCD_CMD_SHIFT_RIGHT 0x04 /* Shift display/cursor to the right */ | |
143 | ||
144 | #define LCD_CMD_FUNCTION_SET 0x20 /* Set function */ | |
145 | #define LCD_CMD_DATA_LEN_8BITS 0x10 /* Set data length to 8 bits */ | |
146 | #define LCD_CMD_TWO_LINES 0x08 /* Set to two display lines */ | |
147 | #define LCD_CMD_FONT_5X10_DOTS 0x04 /* Set char font to 5x10 dots */ | |
148 | ||
149 | #define LCD_CMD_SET_CGRAM_ADDR 0x40 /* Set char generator RAM address */ | |
150 | ||
151 | #define LCD_CMD_SET_DDRAM_ADDR 0x80 /* Set display data RAM address */ | |
152 | ||
429ccf05 | 153 | #define LCD_ESCAPE_LEN 24 /* max chars for LCD escape command */ |
7005b584 WT |
154 | #define LCD_ESCAPE_CHAR 27 /* use char 27 for escape command */ |
155 | ||
36277d4a MG |
156 | #define NOT_SET -1 |
157 | ||
7005b584 WT |
158 | /* macros to simplify use of the parallel port */ |
159 | #define r_ctr(x) (parport_read_control((x)->port)) | |
160 | #define r_dtr(x) (parport_read_data((x)->port)) | |
161 | #define r_str(x) (parport_read_status((x)->port)) | |
6ebb56d9 TY |
162 | #define w_ctr(x, y) (parport_write_control((x)->port, (y))) |
163 | #define w_dtr(x, y) (parport_write_data((x)->port, (y))) | |
7005b584 WT |
164 | |
165 | /* this defines which bits are to be used and which ones to be ignored */ | |
429ccf05 HH |
166 | /* logical or of the output bits involved in the scan matrix */ |
167 | static __u8 scan_mask_o; | |
168 | /* logical or of the input bits involved in the scan matrix */ | |
169 | static __u8 scan_mask_i; | |
7005b584 | 170 | |
7005b584 | 171 | enum input_type { |
698b1515 WT |
172 | INPUT_TYPE_STD, |
173 | INPUT_TYPE_KBD, | |
7005b584 WT |
174 | }; |
175 | ||
176 | enum input_state { | |
698b1515 WT |
177 | INPUT_ST_LOW, |
178 | INPUT_ST_RISING, | |
179 | INPUT_ST_HIGH, | |
180 | INPUT_ST_FALLING, | |
7005b584 WT |
181 | }; |
182 | ||
183 | struct logical_input { | |
698b1515 | 184 | struct list_head list; |
35fe0872 KS |
185 | __u64 mask; |
186 | __u64 value; | |
698b1515 WT |
187 | enum input_type type; |
188 | enum input_state state; | |
189 | __u8 rise_time, fall_time; | |
190 | __u8 rise_timer, fall_timer, high_timer; | |
191 | ||
192 | union { | |
429ccf05 | 193 | struct { /* valid when type == INPUT_TYPE_STD */ |
68d386bf MA |
194 | void (*press_fct)(int); |
195 | void (*release_fct)(int); | |
698b1515 WT |
196 | int press_data; |
197 | int release_data; | |
198 | } std; | |
429ccf05 HH |
199 | struct { /* valid when type == INPUT_TYPE_KBD */ |
200 | /* strings can be non null-terminated */ | |
698b1515 WT |
201 | char press_str[sizeof(void *) + sizeof(int)]; |
202 | char repeat_str[sizeof(void *) + sizeof(int)]; | |
203 | char release_str[sizeof(void *) + sizeof(int)]; | |
204 | } kbd; | |
205 | } u; | |
7005b584 WT |
206 | }; |
207 | ||
36d2041a | 208 | static LIST_HEAD(logical_inputs); /* list of all defined logical inputs */ |
7005b584 WT |
209 | |
210 | /* physical contacts history | |
211 | * Physical contacts are a 45 bits string of 9 groups of 5 bits each. | |
212 | * The 8 lower groups correspond to output bits 0 to 7, and the 9th group | |
213 | * corresponds to the ground. | |
214 | * Within each group, bits are stored in the same order as read on the port : | |
215 | * BAPSE (busy=4, ack=3, paper empty=2, select=1, error=0). | |
35fe0872 | 216 | * So, each __u64 is represented like this : |
7005b584 WT |
217 | * 0000000000000000000BAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSE |
218 | * <-----unused------><gnd><d07><d06><d05><d04><d03><d02><d01><d00> | |
219 | */ | |
429ccf05 HH |
220 | |
221 | /* what has just been read from the I/O ports */ | |
35fe0872 | 222 | static __u64 phys_read; |
429ccf05 | 223 | /* previous phys_read */ |
35fe0872 | 224 | static __u64 phys_read_prev; |
429ccf05 | 225 | /* stabilized phys_read (phys_read|phys_read_prev) */ |
35fe0872 | 226 | static __u64 phys_curr; |
429ccf05 | 227 | /* previous phys_curr */ |
35fe0872 | 228 | static __u64 phys_prev; |
429ccf05 HH |
229 | /* 0 means that at least one logical signal needs be computed */ |
230 | static char inputs_stable; | |
7005b584 | 231 | |
7005b584 | 232 | /* these variables are specific to the keypad */ |
a8b2580b MG |
233 | static struct { |
234 | bool enabled; | |
235 | } keypad; | |
236 | ||
7005b584 | 237 | static char keypad_buffer[KEYPAD_BUFFER]; |
698b1515 WT |
238 | static int keypad_buflen; |
239 | static int keypad_start; | |
240 | static char keypressed; | |
7005b584 | 241 | static wait_queue_head_t keypad_read_wait; |
7005b584 WT |
242 | |
243 | /* lcd-specific variables */ | |
a8b2580b MG |
244 | static struct { |
245 | bool enabled; | |
6d8b588c MG |
246 | bool initialized; |
247 | bool must_clear; | |
248 | ||
8037e2a3 MG |
249 | int height; |
250 | int width; | |
251 | int bwidth; | |
252 | int hwidth; | |
253 | int charset; | |
254 | int proto; | |
6d8b588c MG |
255 | int light_tempo; |
256 | ||
8037e2a3 MG |
257 | /* TODO: use union here? */ |
258 | struct { | |
259 | int e; | |
260 | int rs; | |
261 | int rw; | |
262 | int cl; | |
263 | int da; | |
264 | int bl; | |
265 | } pins; | |
6d8b588c MG |
266 | |
267 | /* contains the LCD config state */ | |
268 | unsigned long int flags; | |
269 | ||
270 | /* Contains the LCD X and Y offset */ | |
271 | struct { | |
272 | unsigned long int x; | |
273 | unsigned long int y; | |
274 | } addr; | |
275 | ||
276 | /* Current escape sequence and it's length or -1 if outside */ | |
277 | struct { | |
278 | char buf[LCD_ESCAPE_LEN + 1]; | |
279 | int len; | |
280 | } esc_seq; | |
a8b2580b | 281 | } lcd; |
429ccf05 | 282 | |
87b8e0c8 MG |
283 | /* Needed only for init */ |
284 | static int selected_lcd_type = NOT_SET; | |
285 | ||
7005b584 WT |
286 | /* |
287 | * Bit masks to convert LCD signals to parallel port outputs. | |
288 | * _d_ are values for data port, _c_ are for control port. | |
289 | * [0] = signal OFF, [1] = signal ON, [2] = mask | |
290 | */ | |
698b1515 WT |
291 | #define BIT_CLR 0 |
292 | #define BIT_SET 1 | |
293 | #define BIT_MSK 2 | |
7005b584 WT |
294 | #define BIT_STATES 3 |
295 | /* | |
296 | * one entry for each bit on the LCD | |
297 | */ | |
298 | #define LCD_BIT_E 0 | |
299 | #define LCD_BIT_RS 1 | |
300 | #define LCD_BIT_RW 2 | |
301 | #define LCD_BIT_BL 3 | |
302 | #define LCD_BIT_CL 4 | |
303 | #define LCD_BIT_DA 5 | |
304 | #define LCD_BITS 6 | |
305 | ||
306 | /* | |
307 | * each bit can be either connected to a DATA or CTRL port | |
308 | */ | |
309 | #define LCD_PORT_C 0 | |
310 | #define LCD_PORT_D 1 | |
311 | #define LCD_PORTS 2 | |
312 | ||
313 | static unsigned char lcd_bits[LCD_PORTS][LCD_BITS][BIT_STATES]; | |
314 | ||
315 | /* | |
316 | * LCD protocols | |
317 | */ | |
318 | #define LCD_PROTO_PARALLEL 0 | |
319 | #define LCD_PROTO_SERIAL 1 | |
77943d31 | 320 | #define LCD_PROTO_TI_DA8XX_LCD 2 |
7005b584 WT |
321 | |
322 | /* | |
323 | * LCD character sets | |
324 | */ | |
325 | #define LCD_CHARSET_NORMAL 0 | |
326 | #define LCD_CHARSET_KS0074 1 | |
327 | ||
328 | /* | |
329 | * LCD types | |
330 | */ | |
331 | #define LCD_TYPE_NONE 0 | |
2c20d92d SM |
332 | #define LCD_TYPE_CUSTOM 1 |
333 | #define LCD_TYPE_OLD 2 | |
334 | #define LCD_TYPE_KS0074 3 | |
335 | #define LCD_TYPE_HANTRONIX 4 | |
336 | #define LCD_TYPE_NEXCOM 5 | |
7005b584 WT |
337 | |
338 | /* | |
339 | * keypad types | |
340 | */ | |
341 | #define KEYPAD_TYPE_NONE 0 | |
342 | #define KEYPAD_TYPE_OLD 1 | |
343 | #define KEYPAD_TYPE_NEW 2 | |
344 | #define KEYPAD_TYPE_NEXCOM 3 | |
345 | ||
346 | /* | |
347 | * panel profiles | |
348 | */ | |
349 | #define PANEL_PROFILE_CUSTOM 0 | |
350 | #define PANEL_PROFILE_OLD 1 | |
351 | #define PANEL_PROFILE_NEW 2 | |
352 | #define PANEL_PROFILE_HANTRONIX 3 | |
353 | #define PANEL_PROFILE_NEXCOM 4 | |
354 | #define PANEL_PROFILE_LARGE 5 | |
355 | ||
356 | /* | |
357 | * Construct custom config from the kernel's configuration | |
358 | */ | |
7005b584 | 359 | #define DEFAULT_PARPORT 0 |
fe4d7e2c | 360 | #define DEFAULT_PROFILE PANEL_PROFILE_LARGE |
98fac3d3 MG |
361 | #define DEFAULT_KEYPAD_TYPE KEYPAD_TYPE_OLD |
362 | #define DEFAULT_LCD_TYPE LCD_TYPE_OLD | |
fe4d7e2c | 363 | #define DEFAULT_LCD_HEIGHT 2 |
7005b584 WT |
364 | #define DEFAULT_LCD_WIDTH 40 |
365 | #define DEFAULT_LCD_BWIDTH 40 | |
366 | #define DEFAULT_LCD_HWIDTH 64 | |
fe4d7e2c | 367 | #define DEFAULT_LCD_CHARSET LCD_CHARSET_NORMAL |
7005b584 WT |
368 | #define DEFAULT_LCD_PROTO LCD_PROTO_PARALLEL |
369 | ||
370 | #define DEFAULT_LCD_PIN_E PIN_AUTOLF | |
371 | #define DEFAULT_LCD_PIN_RS PIN_SELECP | |
372 | #define DEFAULT_LCD_PIN_RW PIN_INITP | |
373 | #define DEFAULT_LCD_PIN_SCL PIN_STROBE | |
374 | #define DEFAULT_LCD_PIN_SDA PIN_D0 | |
375 | #define DEFAULT_LCD_PIN_BL PIN_NOT_SET | |
7005b584 | 376 | |
7005b584 WT |
377 | #ifdef CONFIG_PANEL_PARPORT |
378 | #undef DEFAULT_PARPORT | |
379 | #define DEFAULT_PARPORT CONFIG_PANEL_PARPORT | |
380 | #endif | |
381 | ||
1e13e8aa MG |
382 | #ifdef CONFIG_PANEL_PROFILE |
383 | #undef DEFAULT_PROFILE | |
384 | #define DEFAULT_PROFILE CONFIG_PANEL_PROFILE | |
385 | #endif | |
386 | ||
698b1515 | 387 | #if DEFAULT_PROFILE == 0 /* custom */ |
7005b584 | 388 | #ifdef CONFIG_PANEL_KEYPAD |
98fac3d3 MG |
389 | #undef DEFAULT_KEYPAD_TYPE |
390 | #define DEFAULT_KEYPAD_TYPE CONFIG_PANEL_KEYPAD | |
7005b584 WT |
391 | #endif |
392 | ||
7005b584 | 393 | #ifdef CONFIG_PANEL_LCD |
98fac3d3 MG |
394 | #undef DEFAULT_LCD_TYPE |
395 | #define DEFAULT_LCD_TYPE CONFIG_PANEL_LCD | |
7005b584 WT |
396 | #endif |
397 | ||
1e13e8aa MG |
398 | #ifdef CONFIG_PANEL_LCD_HEIGHT |
399 | #undef DEFAULT_LCD_HEIGHT | |
400 | #define DEFAULT_LCD_HEIGHT CONFIG_PANEL_LCD_HEIGHT | |
401 | #endif | |
402 | ||
7005b584 WT |
403 | #ifdef CONFIG_PANEL_LCD_WIDTH |
404 | #undef DEFAULT_LCD_WIDTH | |
405 | #define DEFAULT_LCD_WIDTH CONFIG_PANEL_LCD_WIDTH | |
406 | #endif | |
407 | ||
408 | #ifdef CONFIG_PANEL_LCD_BWIDTH | |
409 | #undef DEFAULT_LCD_BWIDTH | |
410 | #define DEFAULT_LCD_BWIDTH CONFIG_PANEL_LCD_BWIDTH | |
411 | #endif | |
412 | ||
413 | #ifdef CONFIG_PANEL_LCD_HWIDTH | |
414 | #undef DEFAULT_LCD_HWIDTH | |
415 | #define DEFAULT_LCD_HWIDTH CONFIG_PANEL_LCD_HWIDTH | |
416 | #endif | |
417 | ||
1e13e8aa MG |
418 | #ifdef CONFIG_PANEL_LCD_CHARSET |
419 | #undef DEFAULT_LCD_CHARSET | |
420 | #define DEFAULT_LCD_CHARSET CONFIG_PANEL_LCD_CHARSET | |
7005b584 WT |
421 | #endif |
422 | ||
423 | #ifdef CONFIG_PANEL_LCD_PROTO | |
424 | #undef DEFAULT_LCD_PROTO | |
425 | #define DEFAULT_LCD_PROTO CONFIG_PANEL_LCD_PROTO | |
426 | #endif | |
427 | ||
428 | #ifdef CONFIG_PANEL_LCD_PIN_E | |
429 | #undef DEFAULT_LCD_PIN_E | |
430 | #define DEFAULT_LCD_PIN_E CONFIG_PANEL_LCD_PIN_E | |
431 | #endif | |
432 | ||
433 | #ifdef CONFIG_PANEL_LCD_PIN_RS | |
434 | #undef DEFAULT_LCD_PIN_RS | |
435 | #define DEFAULT_LCD_PIN_RS CONFIG_PANEL_LCD_PIN_RS | |
436 | #endif | |
437 | ||
438 | #ifdef CONFIG_PANEL_LCD_PIN_RW | |
439 | #undef DEFAULT_LCD_PIN_RW | |
440 | #define DEFAULT_LCD_PIN_RW CONFIG_PANEL_LCD_PIN_RW | |
441 | #endif | |
442 | ||
443 | #ifdef CONFIG_PANEL_LCD_PIN_SCL | |
444 | #undef DEFAULT_LCD_PIN_SCL | |
445 | #define DEFAULT_LCD_PIN_SCL CONFIG_PANEL_LCD_PIN_SCL | |
446 | #endif | |
447 | ||
448 | #ifdef CONFIG_PANEL_LCD_PIN_SDA | |
449 | #undef DEFAULT_LCD_PIN_SDA | |
450 | #define DEFAULT_LCD_PIN_SDA CONFIG_PANEL_LCD_PIN_SDA | |
451 | #endif | |
452 | ||
453 | #ifdef CONFIG_PANEL_LCD_PIN_BL | |
454 | #undef DEFAULT_LCD_PIN_BL | |
455 | #define DEFAULT_LCD_PIN_BL CONFIG_PANEL_LCD_PIN_BL | |
456 | #endif | |
457 | ||
7005b584 WT |
458 | #endif /* DEFAULT_PROFILE == 0 */ |
459 | ||
460 | /* global variables */ | |
f4757af8 MG |
461 | |
462 | /* Device single-open policy control */ | |
463 | static atomic_t lcd_available = ATOMIC_INIT(1); | |
464 | static atomic_t keypad_available = ATOMIC_INIT(1); | |
465 | ||
698b1515 | 466 | static struct pardevice *pprt; |
7005b584 | 467 | |
f6d1fcfe | 468 | static int keypad_initialized; |
7005b584 | 469 | |
68d386bf MA |
470 | static void (*lcd_write_cmd)(int); |
471 | static void (*lcd_write_data)(int); | |
472 | static void (*lcd_clear_fast)(void); | |
7005b584 | 473 | |
698b1515 | 474 | static DEFINE_SPINLOCK(pprt_lock); |
7005b584 WT |
475 | static struct timer_list scan_timer; |
476 | ||
63023177 | 477 | MODULE_DESCRIPTION("Generic parallel port LCD/Keypad driver"); |
f6d1fcfe | 478 | |
59a66a24 | 479 | static int parport = DEFAULT_PARPORT; |
698b1515 WT |
480 | module_param(parport, int, 0000); |
481 | MODULE_PARM_DESC(parport, "Parallel port index (0=lpt1, 1=lpt2, ...)"); | |
f6d1fcfe | 482 | |
98e0e762 MG |
483 | static int profile = DEFAULT_PROFILE; |
484 | module_param(profile, int, 0000); | |
485 | MODULE_PARM_DESC(profile, | |
486 | "1=16x2 old kp; 2=serial 16x2, new kp; 3=16x2 hantronix; " | |
487 | "4=16x2 nexcom; default=40x2, old kp"); | |
488 | ||
36277d4a | 489 | static int keypad_type = NOT_SET; |
98e0e762 MG |
490 | module_param(keypad_type, int, 0000); |
491 | MODULE_PARM_DESC(keypad_type, | |
492 | "Keypad type: 0=none, 1=old 6 keys, 2=new 6+1 keys, 3=nexcom 4 keys"); | |
493 | ||
36277d4a | 494 | static int lcd_type = NOT_SET; |
98e0e762 MG |
495 | module_param(lcd_type, int, 0000); |
496 | MODULE_PARM_DESC(lcd_type, | |
2c20d92d | 497 | "LCD type: 0=none, 1=compiled-in, 2=old, 3=serial ks0074, 4=hantronix, 5=nexcom"); |
98e0e762 | 498 | |
36277d4a | 499 | static int lcd_height = NOT_SET; |
698b1515 WT |
500 | module_param(lcd_height, int, 0000); |
501 | MODULE_PARM_DESC(lcd_height, "Number of lines on the LCD"); | |
f6d1fcfe | 502 | |
36277d4a | 503 | static int lcd_width = NOT_SET; |
698b1515 WT |
504 | module_param(lcd_width, int, 0000); |
505 | MODULE_PARM_DESC(lcd_width, "Number of columns on the LCD"); | |
f6d1fcfe | 506 | |
36277d4a | 507 | static int lcd_bwidth = NOT_SET; /* internal buffer width (usually 40) */ |
698b1515 WT |
508 | module_param(lcd_bwidth, int, 0000); |
509 | MODULE_PARM_DESC(lcd_bwidth, "Internal LCD line width (40)"); | |
f6d1fcfe | 510 | |
36277d4a | 511 | static int lcd_hwidth = NOT_SET; /* hardware buffer width (usually 64) */ |
698b1515 WT |
512 | module_param(lcd_hwidth, int, 0000); |
513 | MODULE_PARM_DESC(lcd_hwidth, "LCD line hardware address (64)"); | |
f6d1fcfe | 514 | |
36277d4a | 515 | static int lcd_charset = NOT_SET; |
98e0e762 MG |
516 | module_param(lcd_charset, int, 0000); |
517 | MODULE_PARM_DESC(lcd_charset, "LCD character set: 0=standard, 1=KS0074"); | |
f6d1fcfe | 518 | |
36277d4a | 519 | static int lcd_proto = NOT_SET; |
698b1515 | 520 | module_param(lcd_proto, int, 0000); |
429ccf05 | 521 | MODULE_PARM_DESC(lcd_proto, |
fdf4a494 | 522 | "LCD communication: 0=parallel (//), 1=serial, 2=TI LCD Interface"); |
f6d1fcfe | 523 | |
f6d1fcfe WT |
524 | /* |
525 | * These are the parallel port pins the LCD control signals are connected to. | |
526 | * Set this to 0 if the signal is not used. Set it to its opposite value | |
527 | * (negative) if the signal is negated. -MAXINT is used to indicate that the | |
528 | * pin has not been explicitly specified. | |
529 | * | |
63023177 | 530 | * WARNING! no check will be performed about collisions with keypad ! |
f6d1fcfe WT |
531 | */ |
532 | ||
533 | static int lcd_e_pin = PIN_NOT_SET; | |
698b1515 WT |
534 | module_param(lcd_e_pin, int, 0000); |
535 | MODULE_PARM_DESC(lcd_e_pin, | |
fe5d2e01 | 536 | "# of the // port pin connected to LCD 'E' signal, with polarity (-17..17)"); |
f6d1fcfe WT |
537 | |
538 | static int lcd_rs_pin = PIN_NOT_SET; | |
698b1515 WT |
539 | module_param(lcd_rs_pin, int, 0000); |
540 | MODULE_PARM_DESC(lcd_rs_pin, | |
fe5d2e01 | 541 | "# of the // port pin connected to LCD 'RS' signal, with polarity (-17..17)"); |
f6d1fcfe WT |
542 | |
543 | static int lcd_rw_pin = PIN_NOT_SET; | |
698b1515 WT |
544 | module_param(lcd_rw_pin, int, 0000); |
545 | MODULE_PARM_DESC(lcd_rw_pin, | |
fe5d2e01 | 546 | "# of the // port pin connected to LCD 'RW' signal, with polarity (-17..17)"); |
f6d1fcfe | 547 | |
98e0e762 MG |
548 | static int lcd_cl_pin = PIN_NOT_SET; |
549 | module_param(lcd_cl_pin, int, 0000); | |
550 | MODULE_PARM_DESC(lcd_cl_pin, | |
551 | "# of the // port pin connected to serial LCD 'SCL' signal, with polarity (-17..17)"); | |
f6d1fcfe WT |
552 | |
553 | static int lcd_da_pin = PIN_NOT_SET; | |
698b1515 WT |
554 | module_param(lcd_da_pin, int, 0000); |
555 | MODULE_PARM_DESC(lcd_da_pin, | |
fe5d2e01 | 556 | "# of the // port pin connected to serial LCD 'SDA' signal, with polarity (-17..17)"); |
f6d1fcfe | 557 | |
98e0e762 MG |
558 | static int lcd_bl_pin = PIN_NOT_SET; |
559 | module_param(lcd_bl_pin, int, 0000); | |
560 | MODULE_PARM_DESC(lcd_bl_pin, | |
561 | "# of the // port pin connected to LCD backlight, with polarity (-17..17)"); | |
562 | ||
563 | /* Deprecated module parameters - consider not using them anymore */ | |
564 | ||
36277d4a | 565 | static int lcd_enabled = NOT_SET; |
98e0e762 MG |
566 | module_param(lcd_enabled, int, 0000); |
567 | MODULE_PARM_DESC(lcd_enabled, "Deprecated option, use lcd_type instead"); | |
568 | ||
36277d4a | 569 | static int keypad_enabled = NOT_SET; |
98e0e762 MG |
570 | module_param(keypad_enabled, int, 0000); |
571 | MODULE_PARM_DESC(keypad_enabled, "Deprecated option, use keypad_type instead"); | |
572 | ||
36d2041a | 573 | static const unsigned char *lcd_char_conv; |
7005b584 WT |
574 | |
575 | /* for some LCD drivers (ks0074) we need a charset conversion table. */ | |
36d2041a | 576 | static const unsigned char lcd_char_conv_ks0074[256] = { |
698b1515 WT |
577 | /* 0|8 1|9 2|A 3|B 4|C 5|D 6|E 7|F */ |
578 | /* 0x00 */ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, | |
579 | /* 0x08 */ 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, | |
580 | /* 0x10 */ 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, | |
581 | /* 0x18 */ 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, | |
582 | /* 0x20 */ 0x20, 0x21, 0x22, 0x23, 0xa2, 0x25, 0x26, 0x27, | |
583 | /* 0x28 */ 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, | |
584 | /* 0x30 */ 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, | |
585 | /* 0x38 */ 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, | |
586 | /* 0x40 */ 0xa0, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, | |
587 | /* 0x48 */ 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, | |
588 | /* 0x50 */ 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, | |
589 | /* 0x58 */ 0x58, 0x59, 0x5a, 0xfa, 0xfb, 0xfc, 0x1d, 0xc4, | |
590 | /* 0x60 */ 0x96, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, | |
591 | /* 0x68 */ 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, | |
592 | /* 0x70 */ 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, | |
593 | /* 0x78 */ 0x78, 0x79, 0x7a, 0xfd, 0xfe, 0xff, 0xce, 0x20, | |
594 | /* 0x80 */ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, | |
595 | /* 0x88 */ 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, | |
596 | /* 0x90 */ 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, | |
597 | /* 0x98 */ 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, | |
598 | /* 0xA0 */ 0x20, 0x40, 0xb1, 0xa1, 0x24, 0xa3, 0xfe, 0x5f, | |
599 | /* 0xA8 */ 0x22, 0xc8, 0x61, 0x14, 0x97, 0x2d, 0xad, 0x96, | |
600 | /* 0xB0 */ 0x80, 0x8c, 0x82, 0x83, 0x27, 0x8f, 0x86, 0xdd, | |
601 | /* 0xB8 */ 0x2c, 0x81, 0x6f, 0x15, 0x8b, 0x8a, 0x84, 0x60, | |
602 | /* 0xC0 */ 0xe2, 0xe2, 0xe2, 0x5b, 0x5b, 0xae, 0xbc, 0xa9, | |
603 | /* 0xC8 */ 0xc5, 0xbf, 0xc6, 0xf1, 0xe3, 0xe3, 0xe3, 0xe3, | |
604 | /* 0xD0 */ 0x44, 0x5d, 0xa8, 0xe4, 0xec, 0xec, 0x5c, 0x78, | |
605 | /* 0xD8 */ 0xab, 0xa6, 0xe5, 0x5e, 0x5e, 0xe6, 0xaa, 0xbe, | |
606 | /* 0xE0 */ 0x7f, 0xe7, 0xaf, 0x7b, 0x7b, 0xaf, 0xbd, 0xc8, | |
607 | /* 0xE8 */ 0xa4, 0xa5, 0xc7, 0xf6, 0xa7, 0xe8, 0x69, 0x69, | |
608 | /* 0xF0 */ 0xed, 0x7d, 0xa8, 0xe4, 0xec, 0x5c, 0x5c, 0x25, | |
609 | /* 0xF8 */ 0xac, 0xa6, 0xea, 0xef, 0x7e, 0xeb, 0xb2, 0x79, | |
7005b584 WT |
610 | }; |
611 | ||
36d2041a | 612 | static const char old_keypad_profile[][4][9] = { |
698b1515 WT |
613 | {"S0", "Left\n", "Left\n", ""}, |
614 | {"S1", "Down\n", "Down\n", ""}, | |
615 | {"S2", "Up\n", "Up\n", ""}, | |
616 | {"S3", "Right\n", "Right\n", ""}, | |
617 | {"S4", "Esc\n", "Esc\n", ""}, | |
618 | {"S5", "Ret\n", "Ret\n", ""}, | |
619 | {"", "", "", ""} | |
7005b584 WT |
620 | }; |
621 | ||
622 | /* signals, press, repeat, release */ | |
36d2041a | 623 | static const char new_keypad_profile[][4][9] = { |
698b1515 WT |
624 | {"S0", "Left\n", "Left\n", ""}, |
625 | {"S1", "Down\n", "Down\n", ""}, | |
626 | {"S2", "Up\n", "Up\n", ""}, | |
627 | {"S3", "Right\n", "Right\n", ""}, | |
628 | {"S4s5", "", "Esc\n", "Esc\n"}, | |
629 | {"s4S5", "", "Ret\n", "Ret\n"}, | |
630 | {"S4S5", "Help\n", "", ""}, | |
631 | /* add new signals above this line */ | |
632 | {"", "", "", ""} | |
7005b584 WT |
633 | }; |
634 | ||
635 | /* signals, press, repeat, release */ | |
36d2041a | 636 | static const char nexcom_keypad_profile[][4][9] = { |
698b1515 WT |
637 | {"a-p-e-", "Down\n", "Down\n", ""}, |
638 | {"a-p-E-", "Ret\n", "Ret\n", ""}, | |
639 | {"a-P-E-", "Esc\n", "Esc\n", ""}, | |
640 | {"a-P-e-", "Up\n", "Up\n", ""}, | |
641 | /* add new signals above this line */ | |
642 | {"", "", "", ""} | |
7005b584 WT |
643 | }; |
644 | ||
36d2041a | 645 | static const char (*keypad_profile)[4][9] = old_keypad_profile; |
7005b584 | 646 | |
bea7433b DC |
647 | static DECLARE_BITMAP(bits, LCD_BITS); |
648 | ||
649 | static void lcd_get_bits(unsigned int port, int *val) | |
650 | { | |
651 | unsigned int bit, state; | |
652 | ||
653 | for (bit = 0; bit < LCD_BITS; bit++) { | |
654 | state = test_bit(bit, bits) ? BIT_SET : BIT_CLR; | |
655 | *val &= lcd_bits[port][bit][BIT_MSK]; | |
656 | *val |= lcd_bits[port][bit][state]; | |
657 | } | |
658 | } | |
7005b584 WT |
659 | |
660 | static void init_scan_timer(void); | |
661 | ||
662 | /* sets data port bits according to current signals values */ | |
698b1515 WT |
663 | static int set_data_bits(void) |
664 | { | |
bea7433b | 665 | int val; |
698b1515 WT |
666 | |
667 | val = r_dtr(pprt); | |
bea7433b | 668 | lcd_get_bits(LCD_PORT_D, &val); |
698b1515 WT |
669 | w_dtr(pprt, val); |
670 | return val; | |
7005b584 WT |
671 | } |
672 | ||
673 | /* sets ctrl port bits according to current signals values */ | |
698b1515 WT |
674 | static int set_ctrl_bits(void) |
675 | { | |
bea7433b | 676 | int val; |
698b1515 WT |
677 | |
678 | val = r_ctr(pprt); | |
bea7433b | 679 | lcd_get_bits(LCD_PORT_C, &val); |
698b1515 WT |
680 | w_ctr(pprt, val); |
681 | return val; | |
7005b584 WT |
682 | } |
683 | ||
684 | /* sets ctrl & data port bits according to current signals values */ | |
6136ac86 | 685 | static void panel_set_bits(void) |
698b1515 WT |
686 | { |
687 | set_data_bits(); | |
688 | set_ctrl_bits(); | |
7005b584 WT |
689 | } |
690 | ||
691 | /* | |
692 | * Converts a parallel port pin (from -25 to 25) to data and control ports | |
693 | * masks, and data and control port bits. The signal will be considered | |
694 | * unconnected if it's on pin 0 or an invalid pin (<-25 or >25). | |
695 | * | |
696 | * Result will be used this way : | |
697 | * out(dport, in(dport) & d_val[2] | d_val[signal_state]) | |
698 | * out(cport, in(cport) & c_val[2] | c_val[signal_state]) | |
699 | */ | |
36d2041a | 700 | static void pin_to_bits(int pin, unsigned char *d_val, unsigned char *c_val) |
698b1515 WT |
701 | { |
702 | int d_bit, c_bit, inv; | |
703 | ||
2d53426b DB |
704 | d_val[0] = 0; |
705 | c_val[0] = 0; | |
706 | d_val[1] = 0; | |
707 | c_val[1] = 0; | |
708 | d_val[2] = 0xFF; | |
709 | c_val[2] = 0xFF; | |
698b1515 WT |
710 | |
711 | if (pin == 0) | |
712 | return; | |
713 | ||
714 | inv = (pin < 0); | |
715 | if (inv) | |
716 | pin = -pin; | |
717 | ||
2d53426b DB |
718 | d_bit = 0; |
719 | c_bit = 0; | |
698b1515 WT |
720 | |
721 | switch (pin) { | |
722 | case PIN_STROBE: /* strobe, inverted */ | |
723 | c_bit = PNL_PSTROBE; | |
724 | inv = !inv; | |
725 | break; | |
726 | case PIN_D0...PIN_D7: /* D0 - D7 = 2 - 9 */ | |
727 | d_bit = 1 << (pin - 2); | |
728 | break; | |
729 | case PIN_AUTOLF: /* autofeed, inverted */ | |
730 | c_bit = PNL_PAUTOLF; | |
731 | inv = !inv; | |
732 | break; | |
429ccf05 | 733 | case PIN_INITP: /* init, direct */ |
698b1515 WT |
734 | c_bit = PNL_PINITP; |
735 | break; | |
736 | case PIN_SELECP: /* select_in, inverted */ | |
737 | c_bit = PNL_PSELECP; | |
738 | inv = !inv; | |
739 | break; | |
740 | default: /* unknown pin, ignore */ | |
741 | break; | |
742 | } | |
743 | ||
744 | if (c_bit) { | |
745 | c_val[2] &= ~c_bit; | |
746 | c_val[!inv] = c_bit; | |
747 | } else if (d_bit) { | |
748 | d_val[2] &= ~d_bit; | |
749 | d_val[!inv] = d_bit; | |
750 | } | |
7005b584 WT |
751 | } |
752 | ||
753 | /* sleeps that many milliseconds with a reschedule */ | |
698b1515 WT |
754 | static void long_sleep(int ms) |
755 | { | |
895875a3 | 756 | if (in_interrupt()) |
698b1515 | 757 | mdelay(ms); |
895875a3 NMG |
758 | else |
759 | schedule_timeout_interruptible(msecs_to_jiffies(ms)); | |
698b1515 | 760 | } |
7005b584 | 761 | |
881bf281 AW |
762 | /* |
763 | * send a serial byte to the LCD panel. The caller is responsible for locking | |
764 | * if needed. | |
765 | */ | |
698b1515 WT |
766 | static void lcd_send_serial(int byte) |
767 | { | |
768 | int bit; | |
769 | ||
881bf281 AW |
770 | /* |
771 | * the data bit is set on D0, and the clock on STROBE. | |
772 | * LCD reads D0 on STROBE's rising edge. | |
773 | */ | |
698b1515 | 774 | for (bit = 0; bit < 8; bit++) { |
bea7433b | 775 | clear_bit(LCD_BIT_CL, bits); /* CLK low */ |
6136ac86 | 776 | panel_set_bits(); |
bea7433b DC |
777 | if (byte & 1) { |
778 | set_bit(LCD_BIT_DA, bits); | |
779 | } else { | |
780 | clear_bit(LCD_BIT_DA, bits); | |
781 | } | |
782 | ||
6136ac86 | 783 | panel_set_bits(); |
429ccf05 | 784 | udelay(2); /* maintain the data during 2 us before CLK up */ |
bea7433b | 785 | set_bit(LCD_BIT_CL, bits); /* CLK high */ |
6136ac86 | 786 | panel_set_bits(); |
429ccf05 | 787 | udelay(1); /* maintain the strobe during 1 us */ |
698b1515 WT |
788 | byte >>= 1; |
789 | } | |
7005b584 WT |
790 | } |
791 | ||
792 | /* turn the backlight on or off */ | |
698b1515 WT |
793 | static void lcd_backlight(int on) |
794 | { | |
8037e2a3 | 795 | if (lcd.pins.bl == PIN_NONE) |
698b1515 WT |
796 | return; |
797 | ||
6975e183 | 798 | /* The backlight is activated by setting the AUTOFEED line to +5V */ |
d4d2dbca | 799 | spin_lock_irq(&pprt_lock); |
bea7433b DC |
800 | if (on) |
801 | set_bit(LCD_BIT_BL, bits); | |
802 | else | |
803 | clear_bit(LCD_BIT_BL, bits); | |
6136ac86 | 804 | panel_set_bits(); |
d4d2dbca | 805 | spin_unlock_irq(&pprt_lock); |
7005b584 WT |
806 | } |
807 | ||
808 | /* send a command to the LCD panel in serial mode */ | |
698b1515 WT |
809 | static void lcd_write_cmd_s(int cmd) |
810 | { | |
d4d2dbca | 811 | spin_lock_irq(&pprt_lock); |
698b1515 WT |
812 | lcd_send_serial(0x1F); /* R/W=W, RS=0 */ |
813 | lcd_send_serial(cmd & 0x0F); | |
814 | lcd_send_serial((cmd >> 4) & 0x0F); | |
b64a1cbe | 815 | udelay(40); /* the shortest command takes at least 40 us */ |
d4d2dbca | 816 | spin_unlock_irq(&pprt_lock); |
7005b584 WT |
817 | } |
818 | ||
819 | /* send data to the LCD panel in serial mode */ | |
698b1515 WT |
820 | static void lcd_write_data_s(int data) |
821 | { | |
d4d2dbca | 822 | spin_lock_irq(&pprt_lock); |
698b1515 WT |
823 | lcd_send_serial(0x5F); /* R/W=W, RS=1 */ |
824 | lcd_send_serial(data & 0x0F); | |
825 | lcd_send_serial((data >> 4) & 0x0F); | |
b64a1cbe | 826 | udelay(40); /* the shortest data takes at least 40 us */ |
d4d2dbca | 827 | spin_unlock_irq(&pprt_lock); |
7005b584 WT |
828 | } |
829 | ||
830 | /* send a command to the LCD panel in 8 bits parallel mode */ | |
698b1515 WT |
831 | static void lcd_write_cmd_p8(int cmd) |
832 | { | |
d4d2dbca | 833 | spin_lock_irq(&pprt_lock); |
698b1515 WT |
834 | /* present the data to the data port */ |
835 | w_dtr(pprt, cmd); | |
b64a1cbe | 836 | udelay(20); /* maintain the data during 20 us before the strobe */ |
7005b584 | 837 | |
bea7433b DC |
838 | set_bit(LCD_BIT_E, bits); |
839 | clear_bit(LCD_BIT_RS, bits); | |
840 | clear_bit(LCD_BIT_RW, bits); | |
698b1515 | 841 | set_ctrl_bits(); |
7005b584 | 842 | |
b64a1cbe | 843 | udelay(40); /* maintain the strobe during 40 us */ |
7005b584 | 844 | |
bea7433b | 845 | clear_bit(LCD_BIT_E, bits); |
698b1515 | 846 | set_ctrl_bits(); |
7005b584 | 847 | |
b64a1cbe | 848 | udelay(120); /* the shortest command takes at least 120 us */ |
d4d2dbca | 849 | spin_unlock_irq(&pprt_lock); |
7005b584 WT |
850 | } |
851 | ||
852 | /* send data to the LCD panel in 8 bits parallel mode */ | |
698b1515 WT |
853 | static void lcd_write_data_p8(int data) |
854 | { | |
d4d2dbca | 855 | spin_lock_irq(&pprt_lock); |
698b1515 WT |
856 | /* present the data to the data port */ |
857 | w_dtr(pprt, data); | |
b64a1cbe | 858 | udelay(20); /* maintain the data during 20 us before the strobe */ |
7005b584 | 859 | |
bea7433b DC |
860 | set_bit(LCD_BIT_E, bits); |
861 | set_bit(LCD_BIT_RS, bits); | |
862 | clear_bit(LCD_BIT_RW, bits); | |
698b1515 | 863 | set_ctrl_bits(); |
7005b584 | 864 | |
b64a1cbe | 865 | udelay(40); /* maintain the strobe during 40 us */ |
7005b584 | 866 | |
bea7433b | 867 | clear_bit(LCD_BIT_E, bits); |
698b1515 | 868 | set_ctrl_bits(); |
7005b584 | 869 | |
b64a1cbe | 870 | udelay(45); /* the shortest data takes at least 45 us */ |
d4d2dbca | 871 | spin_unlock_irq(&pprt_lock); |
7005b584 WT |
872 | } |
873 | ||
77943d31 SR |
874 | /* send a command to the TI LCD panel */ |
875 | static void lcd_write_cmd_tilcd(int cmd) | |
876 | { | |
d4d2dbca | 877 | spin_lock_irq(&pprt_lock); |
77943d31 SR |
878 | /* present the data to the control port */ |
879 | w_ctr(pprt, cmd); | |
b64a1cbe | 880 | udelay(60); |
d4d2dbca | 881 | spin_unlock_irq(&pprt_lock); |
77943d31 SR |
882 | } |
883 | ||
884 | /* send data to the TI LCD panel */ | |
885 | static void lcd_write_data_tilcd(int data) | |
886 | { | |
d4d2dbca | 887 | spin_lock_irq(&pprt_lock); |
77943d31 SR |
888 | /* present the data to the data port */ |
889 | w_dtr(pprt, data); | |
b64a1cbe | 890 | udelay(60); |
d4d2dbca | 891 | spin_unlock_irq(&pprt_lock); |
77943d31 SR |
892 | } |
893 | ||
698b1515 WT |
894 | static void lcd_gotoxy(void) |
895 | { | |
2114924a | 896 | lcd_write_cmd(LCD_CMD_SET_DDRAM_ADDR |
6d8b588c | 897 | | (lcd.addr.y ? lcd.hwidth : 0) |
8c17893c NB |
898 | /* |
899 | * we force the cursor to stay at the end of the | |
900 | * line if it wants to go farther | |
901 | */ | |
6d8b588c | 902 | | ((lcd.addr.x < lcd.bwidth) ? lcd.addr.x & |
8037e2a3 | 903 | (lcd.hwidth - 1) : lcd.bwidth - 1)); |
7005b584 WT |
904 | } |
905 | ||
204a4f6d GU |
906 | static void lcd_home(void) |
907 | { | |
908 | lcd.addr.x = 0; | |
909 | lcd.addr.y = 0; | |
910 | lcd_gotoxy(); | |
911 | } | |
912 | ||
698b1515 WT |
913 | static void lcd_print(char c) |
914 | { | |
6d8b588c | 915 | if (lcd.addr.x < lcd.bwidth) { |
b565b3fb | 916 | if (lcd_char_conv) |
698b1515 WT |
917 | c = lcd_char_conv[(unsigned char)c]; |
918 | lcd_write_data(c); | |
6d8b588c | 919 | lcd.addr.x++; |
698b1515 WT |
920 | } |
921 | /* prevents the cursor from wrapping onto the next line */ | |
6d8b588c | 922 | if (lcd.addr.x == lcd.bwidth) |
698b1515 | 923 | lcd_gotoxy(); |
7005b584 WT |
924 | } |
925 | ||
926 | /* fills the display with spaces and resets X/Y */ | |
698b1515 WT |
927 | static void lcd_clear_fast_s(void) |
928 | { | |
929 | int pos; | |
c3ed0afc | 930 | |
204a4f6d | 931 | lcd_home(); |
698b1515 | 932 | |
d4d2dbca | 933 | spin_lock_irq(&pprt_lock); |
8037e2a3 | 934 | for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) { |
698b1515 WT |
935 | lcd_send_serial(0x5F); /* R/W=W, RS=1 */ |
936 | lcd_send_serial(' ' & 0x0F); | |
937 | lcd_send_serial((' ' >> 4) & 0x0F); | |
df44f150 | 938 | /* the shortest data takes at least 40 us */ |
4cff7adb | 939 | udelay(40); |
698b1515 | 940 | } |
d4d2dbca | 941 | spin_unlock_irq(&pprt_lock); |
698b1515 | 942 | |
204a4f6d | 943 | lcd_home(); |
7005b584 WT |
944 | } |
945 | ||
946 | /* fills the display with spaces and resets X/Y */ | |
698b1515 WT |
947 | static void lcd_clear_fast_p8(void) |
948 | { | |
949 | int pos; | |
c3ed0afc | 950 | |
204a4f6d | 951 | lcd_home(); |
7005b584 | 952 | |
d4d2dbca | 953 | spin_lock_irq(&pprt_lock); |
8037e2a3 | 954 | for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) { |
698b1515 WT |
955 | /* present the data to the data port */ |
956 | w_dtr(pprt, ' '); | |
429ccf05 HH |
957 | |
958 | /* maintain the data during 20 us before the strobe */ | |
b64a1cbe | 959 | udelay(20); |
7005b584 | 960 | |
bea7433b DC |
961 | set_bit(LCD_BIT_E, bits); |
962 | set_bit(LCD_BIT_RS, bits); | |
963 | clear_bit(LCD_BIT_RW, bits); | |
698b1515 | 964 | set_ctrl_bits(); |
7005b584 | 965 | |
429ccf05 | 966 | /* maintain the strobe during 40 us */ |
b64a1cbe | 967 | udelay(40); |
7005b584 | 968 | |
bea7433b | 969 | clear_bit(LCD_BIT_E, bits); |
698b1515 | 970 | set_ctrl_bits(); |
7005b584 | 971 | |
429ccf05 | 972 | /* the shortest data takes at least 45 us */ |
b64a1cbe | 973 | udelay(45); |
698b1515 | 974 | } |
d4d2dbca | 975 | spin_unlock_irq(&pprt_lock); |
7005b584 | 976 | |
204a4f6d | 977 | lcd_home(); |
7005b584 WT |
978 | } |
979 | ||
77943d31 SR |
980 | /* fills the display with spaces and resets X/Y */ |
981 | static void lcd_clear_fast_tilcd(void) | |
982 | { | |
983 | int pos; | |
c3ed0afc | 984 | |
204a4f6d | 985 | lcd_home(); |
77943d31 | 986 | |
d4d2dbca | 987 | spin_lock_irq(&pprt_lock); |
8037e2a3 | 988 | for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) { |
77943d31 SR |
989 | /* present the data to the data port */ |
990 | w_dtr(pprt, ' '); | |
b64a1cbe | 991 | udelay(60); |
77943d31 SR |
992 | } |
993 | ||
d4d2dbca | 994 | spin_unlock_irq(&pprt_lock); |
77943d31 | 995 | |
204a4f6d | 996 | lcd_home(); |
77943d31 SR |
997 | } |
998 | ||
7005b584 | 999 | /* clears the display and resets X/Y */ |
698b1515 WT |
1000 | static void lcd_clear_display(void) |
1001 | { | |
2114924a | 1002 | lcd_write_cmd(LCD_CMD_DISPLAY_CLEAR); |
6d8b588c MG |
1003 | lcd.addr.x = 0; |
1004 | lcd.addr.y = 0; | |
698b1515 WT |
1005 | /* we must wait a few milliseconds (15) */ |
1006 | long_sleep(15); | |
7005b584 WT |
1007 | } |
1008 | ||
698b1515 WT |
1009 | static void lcd_init_display(void) |
1010 | { | |
6d8b588c | 1011 | lcd.flags = ((lcd.height > 1) ? LCD_FLAG_N : 0) |
698b1515 | 1012 | | LCD_FLAG_D | LCD_FLAG_C | LCD_FLAG_B; |
7005b584 | 1013 | |
698b1515 | 1014 | long_sleep(20); /* wait 20 ms after power-up for the paranoid */ |
7005b584 | 1015 | |
2114924a MG |
1016 | /* 8bits, 1 line, small fonts; let's do it 3 times */ |
1017 | lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS); | |
698b1515 | 1018 | long_sleep(10); |
2114924a | 1019 | lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS); |
698b1515 | 1020 | long_sleep(10); |
2114924a | 1021 | lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS); |
698b1515 | 1022 | long_sleep(10); |
7005b584 | 1023 | |
2114924a MG |
1024 | /* set font height and lines number */ |
1025 | lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS | |
1026 | | ((lcd.flags & LCD_FLAG_F) ? LCD_CMD_FONT_5X10_DOTS : 0) | |
1027 | | ((lcd.flags & LCD_FLAG_N) ? LCD_CMD_TWO_LINES : 0) | |
698b1515 WT |
1028 | ); |
1029 | long_sleep(10); | |
7005b584 | 1030 | |
2114924a MG |
1031 | /* display off, cursor off, blink off */ |
1032 | lcd_write_cmd(LCD_CMD_DISPLAY_CTRL); | |
698b1515 | 1033 | long_sleep(10); |
7005b584 | 1034 | |
2114924a MG |
1035 | lcd_write_cmd(LCD_CMD_DISPLAY_CTRL /* set display mode */ |
1036 | | ((lcd.flags & LCD_FLAG_D) ? LCD_CMD_DISPLAY_ON : 0) | |
1037 | | ((lcd.flags & LCD_FLAG_C) ? LCD_CMD_CURSOR_ON : 0) | |
1038 | | ((lcd.flags & LCD_FLAG_B) ? LCD_CMD_BLINK_ON : 0) | |
698b1515 | 1039 | ); |
7005b584 | 1040 | |
6d8b588c | 1041 | lcd_backlight((lcd.flags & LCD_FLAG_L) ? 1 : 0); |
7005b584 | 1042 | |
698b1515 | 1043 | long_sleep(10); |
7005b584 | 1044 | |
429ccf05 | 1045 | /* entry mode set : increment, cursor shifting */ |
2114924a | 1046 | lcd_write_cmd(LCD_CMD_ENTRY_MODE | LCD_CMD_CURSOR_INC); |
7005b584 | 1047 | |
698b1515 | 1048 | lcd_clear_display(); |
7005b584 WT |
1049 | } |
1050 | ||
1051 | /* | |
1052 | * These are the file operation function for user access to /dev/lcd | |
1053 | * This function can also be called from inside the kernel, by | |
1054 | * setting file and ppos to NULL. | |
1055 | * | |
1056 | */ | |
1057 | ||
429ccf05 HH |
1058 | static inline int handle_lcd_special_code(void) |
1059 | { | |
1060 | /* LCD special codes */ | |
1061 | ||
1062 | int processed = 0; | |
1063 | ||
6d8b588c MG |
1064 | char *esc = lcd.esc_seq.buf + 2; |
1065 | int oldflags = lcd.flags; | |
429ccf05 HH |
1066 | |
1067 | /* check for display mode flags */ | |
1068 | switch (*esc) { | |
1069 | case 'D': /* Display ON */ | |
6d8b588c | 1070 | lcd.flags |= LCD_FLAG_D; |
429ccf05 HH |
1071 | processed = 1; |
1072 | break; | |
1073 | case 'd': /* Display OFF */ | |
6d8b588c | 1074 | lcd.flags &= ~LCD_FLAG_D; |
429ccf05 HH |
1075 | processed = 1; |
1076 | break; | |
1077 | case 'C': /* Cursor ON */ | |
6d8b588c | 1078 | lcd.flags |= LCD_FLAG_C; |
429ccf05 HH |
1079 | processed = 1; |
1080 | break; | |
1081 | case 'c': /* Cursor OFF */ | |
6d8b588c | 1082 | lcd.flags &= ~LCD_FLAG_C; |
429ccf05 HH |
1083 | processed = 1; |
1084 | break; | |
1085 | case 'B': /* Blink ON */ | |
6d8b588c | 1086 | lcd.flags |= LCD_FLAG_B; |
429ccf05 HH |
1087 | processed = 1; |
1088 | break; | |
1089 | case 'b': /* Blink OFF */ | |
6d8b588c | 1090 | lcd.flags &= ~LCD_FLAG_B; |
429ccf05 HH |
1091 | processed = 1; |
1092 | break; | |
1093 | case '+': /* Back light ON */ | |
6d8b588c | 1094 | lcd.flags |= LCD_FLAG_L; |
429ccf05 HH |
1095 | processed = 1; |
1096 | break; | |
1097 | case '-': /* Back light OFF */ | |
6d8b588c | 1098 | lcd.flags &= ~LCD_FLAG_L; |
429ccf05 HH |
1099 | processed = 1; |
1100 | break; | |
1101 | case '*': | |
1102 | /* flash back light using the keypad timer */ | |
b565b3fb | 1103 | if (scan_timer.function) { |
832bf28c SS |
1104 | if (lcd.light_tempo == 0 && |
1105 | ((lcd.flags & LCD_FLAG_L) == 0)) | |
429ccf05 | 1106 | lcd_backlight(1); |
6d8b588c | 1107 | lcd.light_tempo = FLASH_LIGHT_TEMPO; |
429ccf05 HH |
1108 | } |
1109 | processed = 1; | |
1110 | break; | |
1111 | case 'f': /* Small Font */ | |
6d8b588c | 1112 | lcd.flags &= ~LCD_FLAG_F; |
429ccf05 HH |
1113 | processed = 1; |
1114 | break; | |
1115 | case 'F': /* Large Font */ | |
6d8b588c | 1116 | lcd.flags |= LCD_FLAG_F; |
429ccf05 HH |
1117 | processed = 1; |
1118 | break; | |
1119 | case 'n': /* One Line */ | |
6d8b588c | 1120 | lcd.flags &= ~LCD_FLAG_N; |
429ccf05 HH |
1121 | processed = 1; |
1122 | break; | |
1123 | case 'N': /* Two Lines */ | |
6d8b588c | 1124 | lcd.flags |= LCD_FLAG_N; |
429ccf05 HH |
1125 | break; |
1126 | case 'l': /* Shift Cursor Left */ | |
6d8b588c | 1127 | if (lcd.addr.x > 0) { |
429ccf05 | 1128 | /* back one char if not at end of line */ |
6d8b588c | 1129 | if (lcd.addr.x < lcd.bwidth) |
2114924a | 1130 | lcd_write_cmd(LCD_CMD_SHIFT); |
6d8b588c | 1131 | lcd.addr.x--; |
429ccf05 HH |
1132 | } |
1133 | processed = 1; | |
1134 | break; | |
1135 | case 'r': /* shift cursor right */ | |
6d8b588c | 1136 | if (lcd.addr.x < lcd.width) { |
429ccf05 | 1137 | /* allow the cursor to pass the end of the line */ |
2114924a MG |
1138 | if (lcd.addr.x < (lcd.bwidth - 1)) |
1139 | lcd_write_cmd(LCD_CMD_SHIFT | | |
1140 | LCD_CMD_SHIFT_RIGHT); | |
6d8b588c | 1141 | lcd.addr.x++; |
429ccf05 HH |
1142 | } |
1143 | processed = 1; | |
1144 | break; | |
1145 | case 'L': /* shift display left */ | |
2114924a | 1146 | lcd_write_cmd(LCD_CMD_SHIFT | LCD_CMD_DISPLAY_SHIFT); |
429ccf05 HH |
1147 | processed = 1; |
1148 | break; | |
1149 | case 'R': /* shift display right */ | |
2114924a MG |
1150 | lcd_write_cmd(LCD_CMD_SHIFT | LCD_CMD_DISPLAY_SHIFT | |
1151 | LCD_CMD_SHIFT_RIGHT); | |
429ccf05 HH |
1152 | processed = 1; |
1153 | break; | |
1154 | case 'k': { /* kill end of line */ | |
1155 | int x; | |
c3ed0afc | 1156 | |
6d8b588c | 1157 | for (x = lcd.addr.x; x < lcd.bwidth; x++) |
429ccf05 HH |
1158 | lcd_write_data(' '); |
1159 | ||
1160 | /* restore cursor position */ | |
1161 | lcd_gotoxy(); | |
1162 | processed = 1; | |
1163 | break; | |
1164 | } | |
1165 | case 'I': /* reinitialize display */ | |
1166 | lcd_init_display(); | |
429ccf05 HH |
1167 | processed = 1; |
1168 | break; | |
1169 | case 'G': { | |
1170 | /* Generator : LGcxxxxx...xx; must have <c> between '0' | |
1171 | * and '7', representing the numerical ASCII code of the | |
1172 | * redefined character, and <xx...xx> a sequence of 16 | |
1173 | * hex digits representing 8 bytes for each character. | |
1174 | * Most LCDs will only use 5 lower bits of the 7 first | |
1175 | * bytes. | |
1176 | */ | |
1177 | ||
1178 | unsigned char cgbytes[8]; | |
1179 | unsigned char cgaddr; | |
1180 | int cgoffset; | |
1181 | int shift; | |
1182 | char value; | |
1183 | int addr; | |
1184 | ||
b565b3fb | 1185 | if (!strchr(esc, ';')) |
429ccf05 HH |
1186 | break; |
1187 | ||
1188 | esc++; | |
1189 | ||
1190 | cgaddr = *(esc++) - '0'; | |
1191 | if (cgaddr > 7) { | |
1192 | processed = 1; | |
1193 | break; | |
1194 | } | |
1195 | ||
1196 | cgoffset = 0; | |
1197 | shift = 0; | |
1198 | value = 0; | |
1199 | while (*esc && cgoffset < 8) { | |
1200 | shift ^= 4; | |
3ac76904 | 1201 | if (*esc >= '0' && *esc <= '9') { |
429ccf05 | 1202 | value |= (*esc - '0') << shift; |
3ac76904 | 1203 | } else if (*esc >= 'A' && *esc <= 'Z') { |
429ccf05 | 1204 | value |= (*esc - 'A' + 10) << shift; |
3ac76904 | 1205 | } else if (*esc >= 'a' && *esc <= 'z') { |
429ccf05 | 1206 | value |= (*esc - 'a' + 10) << shift; |
3ac76904 | 1207 | } else { |
429ccf05 HH |
1208 | esc++; |
1209 | continue; | |
1210 | } | |
1211 | ||
1212 | if (shift == 0) { | |
1213 | cgbytes[cgoffset++] = value; | |
1214 | value = 0; | |
1215 | } | |
1216 | ||
1217 | esc++; | |
1218 | } | |
1219 | ||
2114924a | 1220 | lcd_write_cmd(LCD_CMD_SET_CGRAM_ADDR | (cgaddr * 8)); |
429ccf05 HH |
1221 | for (addr = 0; addr < cgoffset; addr++) |
1222 | lcd_write_data(cgbytes[addr]); | |
1223 | ||
1224 | /* ensures that we stop writing to CGRAM */ | |
1225 | lcd_gotoxy(); | |
1226 | processed = 1; | |
1227 | break; | |
1228 | } | |
1229 | case 'x': /* gotoxy : LxXXX[yYYY]; */ | |
1230 | case 'y': /* gotoxy : LyYYY[xXXX]; */ | |
b565b3fb | 1231 | if (!strchr(esc, ';')) |
429ccf05 HH |
1232 | break; |
1233 | ||
1234 | while (*esc) { | |
1235 | if (*esc == 'x') { | |
1236 | esc++; | |
6d8b588c | 1237 | if (kstrtoul(esc, 10, &lcd.addr.x) < 0) |
12995706 | 1238 | break; |
429ccf05 HH |
1239 | } else if (*esc == 'y') { |
1240 | esc++; | |
6d8b588c | 1241 | if (kstrtoul(esc, 10, &lcd.addr.y) < 0) |
12995706 | 1242 | break; |
3ac76904 | 1243 | } else { |
429ccf05 | 1244 | break; |
3ac76904 | 1245 | } |
429ccf05 HH |
1246 | } |
1247 | ||
1248 | lcd_gotoxy(); | |
1249 | processed = 1; | |
1250 | break; | |
1251 | } | |
1252 | ||
2114924a | 1253 | /* TODO: This indent party here got ugly, clean it! */ |
f2635894 | 1254 | /* Check whether one flag was changed */ |
6d8b588c | 1255 | if (oldflags != lcd.flags) { |
429ccf05 | 1256 | /* check whether one of B,C,D flags were changed */ |
6d8b588c | 1257 | if ((oldflags ^ lcd.flags) & |
429ccf05 HH |
1258 | (LCD_FLAG_B | LCD_FLAG_C | LCD_FLAG_D)) |
1259 | /* set display mode */ | |
2114924a MG |
1260 | lcd_write_cmd(LCD_CMD_DISPLAY_CTRL |
1261 | | ((lcd.flags & LCD_FLAG_D) | |
1262 | ? LCD_CMD_DISPLAY_ON : 0) | |
1263 | | ((lcd.flags & LCD_FLAG_C) | |
1264 | ? LCD_CMD_CURSOR_ON : 0) | |
1265 | | ((lcd.flags & LCD_FLAG_B) | |
1266 | ? LCD_CMD_BLINK_ON : 0)); | |
429ccf05 | 1267 | /* check whether one of F,N flags was changed */ |
6d8b588c | 1268 | else if ((oldflags ^ lcd.flags) & (LCD_FLAG_F | LCD_FLAG_N)) |
2114924a MG |
1269 | lcd_write_cmd(LCD_CMD_FUNCTION_SET |
1270 | | LCD_CMD_DATA_LEN_8BITS | |
1271 | | ((lcd.flags & LCD_FLAG_F) | |
2114924a | 1272 | ? LCD_CMD_FONT_5X10_DOTS |
84a1ed04 GU |
1273 | : 0) |
1274 | | ((lcd.flags & LCD_FLAG_N) | |
1275 | ? LCD_CMD_TWO_LINES | |
2114924a | 1276 | : 0)); |
f2635894 | 1277 | /* check whether L flag was changed */ |
6d8b588c MG |
1278 | else if ((oldflags ^ lcd.flags) & (LCD_FLAG_L)) { |
1279 | if (lcd.flags & (LCD_FLAG_L)) | |
429ccf05 | 1280 | lcd_backlight(1); |
6d8b588c | 1281 | else if (lcd.light_tempo == 0) |
8c17893c NB |
1282 | /* |
1283 | * switch off the light only when the tempo | |
1284 | * lighting is gone | |
1285 | */ | |
429ccf05 HH |
1286 | lcd_backlight(0); |
1287 | } | |
1288 | } | |
1289 | ||
1290 | return processed; | |
1291 | } | |
1292 | ||
70a8c3eb BA |
1293 | static void lcd_write_char(char c) |
1294 | { | |
1295 | /* first, we'll test if we're in escape mode */ | |
6d8b588c | 1296 | if ((c != '\n') && lcd.esc_seq.len >= 0) { |
70a8c3eb | 1297 | /* yes, let's add this char to the buffer */ |
6d8b588c MG |
1298 | lcd.esc_seq.buf[lcd.esc_seq.len++] = c; |
1299 | lcd.esc_seq.buf[lcd.esc_seq.len] = 0; | |
70a8c3eb BA |
1300 | } else { |
1301 | /* aborts any previous escape sequence */ | |
6d8b588c | 1302 | lcd.esc_seq.len = -1; |
70a8c3eb BA |
1303 | |
1304 | switch (c) { | |
1305 | case LCD_ESCAPE_CHAR: | |
1306 | /* start of an escape sequence */ | |
6d8b588c MG |
1307 | lcd.esc_seq.len = 0; |
1308 | lcd.esc_seq.buf[lcd.esc_seq.len] = 0; | |
70a8c3eb BA |
1309 | break; |
1310 | case '\b': | |
1311 | /* go back one char and clear it */ | |
6d8b588c | 1312 | if (lcd.addr.x > 0) { |
8c17893c NB |
1313 | /* |
1314 | * check if we're not at the | |
1315 | * end of the line | |
1316 | */ | |
6d8b588c | 1317 | if (lcd.addr.x < lcd.bwidth) |
70a8c3eb | 1318 | /* back one char */ |
2114924a | 1319 | lcd_write_cmd(LCD_CMD_SHIFT); |
6d8b588c | 1320 | lcd.addr.x--; |
70a8c3eb BA |
1321 | } |
1322 | /* replace with a space */ | |
1323 | lcd_write_data(' '); | |
1324 | /* back one char again */ | |
2114924a | 1325 | lcd_write_cmd(LCD_CMD_SHIFT); |
70a8c3eb BA |
1326 | break; |
1327 | case '\014': | |
1328 | /* quickly clear the display */ | |
1329 | lcd_clear_fast(); | |
1330 | break; | |
1331 | case '\n': | |
8c17893c NB |
1332 | /* |
1333 | * flush the remainder of the current line and | |
1334 | * go to the beginning of the next line | |
1335 | */ | |
6d8b588c | 1336 | for (; lcd.addr.x < lcd.bwidth; lcd.addr.x++) |
70a8c3eb | 1337 | lcd_write_data(' '); |
6d8b588c MG |
1338 | lcd.addr.x = 0; |
1339 | lcd.addr.y = (lcd.addr.y + 1) % lcd.height; | |
70a8c3eb BA |
1340 | lcd_gotoxy(); |
1341 | break; | |
1342 | case '\r': | |
1343 | /* go to the beginning of the same line */ | |
6d8b588c | 1344 | lcd.addr.x = 0; |
70a8c3eb BA |
1345 | lcd_gotoxy(); |
1346 | break; | |
1347 | case '\t': | |
1348 | /* print a space instead of the tab */ | |
1349 | lcd_print(' '); | |
1350 | break; | |
1351 | default: | |
1352 | /* simply print this char */ | |
1353 | lcd_print(c); | |
1354 | break; | |
1355 | } | |
1356 | } | |
1357 | ||
8c17893c NB |
1358 | /* |
1359 | * now we'll see if we're in an escape mode and if the current | |
1360 | * escape sequence can be understood. | |
1361 | */ | |
6d8b588c | 1362 | if (lcd.esc_seq.len >= 2) { |
70a8c3eb BA |
1363 | int processed = 0; |
1364 | ||
6d8b588c | 1365 | if (!strcmp(lcd.esc_seq.buf, "[2J")) { |
70a8c3eb BA |
1366 | /* clear the display */ |
1367 | lcd_clear_fast(); | |
1368 | processed = 1; | |
6d8b588c | 1369 | } else if (!strcmp(lcd.esc_seq.buf, "[H")) { |
70a8c3eb | 1370 | /* cursor to home */ |
204a4f6d | 1371 | lcd_home(); |
70a8c3eb BA |
1372 | processed = 1; |
1373 | } | |
1374 | /* codes starting with ^[[L */ | |
6d8b588c MG |
1375 | else if ((lcd.esc_seq.len >= 3) && |
1376 | (lcd.esc_seq.buf[0] == '[') && | |
1377 | (lcd.esc_seq.buf[1] == 'L')) { | |
70a8c3eb BA |
1378 | processed = handle_lcd_special_code(); |
1379 | } | |
1380 | ||
1381 | /* LCD special escape codes */ | |
8c17893c NB |
1382 | /* |
1383 | * flush the escape sequence if it's been processed | |
1384 | * or if it is getting too long. | |
1385 | */ | |
6d8b588c MG |
1386 | if (processed || (lcd.esc_seq.len >= LCD_ESCAPE_LEN)) |
1387 | lcd.esc_seq.len = -1; | |
70a8c3eb BA |
1388 | } /* escape codes */ |
1389 | } | |
1390 | ||
698b1515 | 1391 | static ssize_t lcd_write(struct file *file, |
fdf4a494 | 1392 | const char __user *buf, size_t count, loff_t *ppos) |
698b1515 | 1393 | { |
70a8c3eb | 1394 | const char __user *tmp = buf; |
698b1515 WT |
1395 | char c; |
1396 | ||
70a8c3eb | 1397 | for (; count-- > 0; (*ppos)++, tmp++) { |
698b1515 | 1398 | if (!in_interrupt() && (((count + 1) & 0x1f) == 0)) |
8c17893c NB |
1399 | /* |
1400 | * let's be a little nice with other processes | |
1401 | * that need some CPU | |
1402 | */ | |
429ccf05 | 1403 | schedule(); |
698b1515 | 1404 | |
6a4193a2 | 1405 | if (get_user(c, tmp)) |
698b1515 WT |
1406 | return -EFAULT; |
1407 | ||
70a8c3eb | 1408 | lcd_write_char(c); |
698b1515 | 1409 | } |
7005b584 | 1410 | |
698b1515 | 1411 | return tmp - buf; |
7005b584 WT |
1412 | } |
1413 | ||
698b1515 WT |
1414 | static int lcd_open(struct inode *inode, struct file *file) |
1415 | { | |
f4757af8 | 1416 | if (!atomic_dec_and_test(&lcd_available)) |
698b1515 | 1417 | return -EBUSY; /* open only once at a time */ |
7005b584 | 1418 | |
698b1515 WT |
1419 | if (file->f_mode & FMODE_READ) /* device is write-only */ |
1420 | return -EPERM; | |
7005b584 | 1421 | |
6d8b588c | 1422 | if (lcd.must_clear) { |
698b1515 | 1423 | lcd_clear_display(); |
6d8b588c | 1424 | lcd.must_clear = false; |
698b1515 | 1425 | } |
3ff81013 | 1426 | return nonseekable_open(inode, file); |
7005b584 WT |
1427 | } |
1428 | ||
698b1515 WT |
1429 | static int lcd_release(struct inode *inode, struct file *file) |
1430 | { | |
f4757af8 | 1431 | atomic_inc(&lcd_available); |
698b1515 | 1432 | return 0; |
7005b584 WT |
1433 | } |
1434 | ||
429ccf05 | 1435 | static const struct file_operations lcd_fops = { |
698b1515 WT |
1436 | .write = lcd_write, |
1437 | .open = lcd_open, | |
1438 | .release = lcd_release, | |
3ff81013 | 1439 | .llseek = no_llseek, |
7005b584 WT |
1440 | }; |
1441 | ||
1442 | static struct miscdevice lcd_dev = { | |
6c3773de MG |
1443 | .minor = LCD_MINOR, |
1444 | .name = "lcd", | |
1445 | .fops = &lcd_fops, | |
7005b584 WT |
1446 | }; |
1447 | ||
7005b584 | 1448 | /* public function usable from the kernel for any purpose */ |
36d2041a | 1449 | static void panel_lcd_print(const char *s) |
698b1515 | 1450 | { |
70a8c3eb BA |
1451 | const char *tmp = s; |
1452 | int count = strlen(s); | |
1453 | ||
6d8b588c | 1454 | if (lcd.enabled && lcd.initialized) { |
70a8c3eb BA |
1455 | for (; count-- > 0; tmp++) { |
1456 | if (!in_interrupt() && (((count + 1) & 0x1f) == 0)) | |
8c17893c NB |
1457 | /* |
1458 | * let's be a little nice with other processes | |
1459 | * that need some CPU | |
1460 | */ | |
70a8c3eb BA |
1461 | schedule(); |
1462 | ||
1463 | lcd_write_char(*tmp); | |
1464 | } | |
1465 | } | |
7005b584 WT |
1466 | } |
1467 | ||
7005b584 | 1468 | /* initialize the LCD driver */ |
36d2041a | 1469 | static void lcd_init(void) |
698b1515 | 1470 | { |
87b8e0c8 | 1471 | switch (selected_lcd_type) { |
429ccf05 HH |
1472 | case LCD_TYPE_OLD: |
1473 | /* parallel mode, 8 bits */ | |
8037e2a3 MG |
1474 | lcd.proto = LCD_PROTO_PARALLEL; |
1475 | lcd.charset = LCD_CHARSET_NORMAL; | |
1476 | lcd.pins.e = PIN_STROBE; | |
1477 | lcd.pins.rs = PIN_AUTOLF; | |
1478 | ||
1479 | lcd.width = 40; | |
1480 | lcd.bwidth = 40; | |
1481 | lcd.hwidth = 64; | |
1482 | lcd.height = 2; | |
7005b584 | 1483 | break; |
429ccf05 HH |
1484 | case LCD_TYPE_KS0074: |
1485 | /* serial mode, ks0074 */ | |
8037e2a3 MG |
1486 | lcd.proto = LCD_PROTO_SERIAL; |
1487 | lcd.charset = LCD_CHARSET_KS0074; | |
1488 | lcd.pins.bl = PIN_AUTOLF; | |
1489 | lcd.pins.cl = PIN_STROBE; | |
1490 | lcd.pins.da = PIN_D0; | |
1491 | ||
1492 | lcd.width = 16; | |
1493 | lcd.bwidth = 40; | |
1494 | lcd.hwidth = 16; | |
1495 | lcd.height = 2; | |
7005b584 | 1496 | break; |
429ccf05 HH |
1497 | case LCD_TYPE_NEXCOM: |
1498 | /* parallel mode, 8 bits, generic */ | |
8037e2a3 MG |
1499 | lcd.proto = LCD_PROTO_PARALLEL; |
1500 | lcd.charset = LCD_CHARSET_NORMAL; | |
1501 | lcd.pins.e = PIN_AUTOLF; | |
1502 | lcd.pins.rs = PIN_SELECP; | |
1503 | lcd.pins.rw = PIN_INITP; | |
1504 | ||
1505 | lcd.width = 16; | |
1506 | lcd.bwidth = 40; | |
1507 | lcd.hwidth = 64; | |
1508 | lcd.height = 2; | |
7005b584 | 1509 | break; |
429ccf05 HH |
1510 | case LCD_TYPE_CUSTOM: |
1511 | /* customer-defined */ | |
8037e2a3 MG |
1512 | lcd.proto = DEFAULT_LCD_PROTO; |
1513 | lcd.charset = DEFAULT_LCD_CHARSET; | |
7005b584 WT |
1514 | /* default geometry will be set later */ |
1515 | break; | |
429ccf05 HH |
1516 | case LCD_TYPE_HANTRONIX: |
1517 | /* parallel mode, 8 bits, hantronix-like */ | |
698b1515 | 1518 | default: |
8037e2a3 MG |
1519 | lcd.proto = LCD_PROTO_PARALLEL; |
1520 | lcd.charset = LCD_CHARSET_NORMAL; | |
1521 | lcd.pins.e = PIN_STROBE; | |
1522 | lcd.pins.rs = PIN_SELECP; | |
1523 | ||
1524 | lcd.width = 16; | |
1525 | lcd.bwidth = 40; | |
1526 | lcd.hwidth = 64; | |
1527 | lcd.height = 2; | |
7005b584 | 1528 | break; |
698b1515 | 1529 | } |
7005b584 | 1530 | |
8037e2a3 | 1531 | /* Overwrite with module params set on loading */ |
1a4b2e3e | 1532 | if (lcd_height != NOT_SET) |
8037e2a3 | 1533 | lcd.height = lcd_height; |
1a4b2e3e | 1534 | if (lcd_width != NOT_SET) |
8037e2a3 | 1535 | lcd.width = lcd_width; |
1a4b2e3e | 1536 | if (lcd_bwidth != NOT_SET) |
8037e2a3 | 1537 | lcd.bwidth = lcd_bwidth; |
1a4b2e3e | 1538 | if (lcd_hwidth != NOT_SET) |
8037e2a3 | 1539 | lcd.hwidth = lcd_hwidth; |
1a4b2e3e | 1540 | if (lcd_charset != NOT_SET) |
8037e2a3 | 1541 | lcd.charset = lcd_charset; |
1a4b2e3e | 1542 | if (lcd_proto != NOT_SET) |
8037e2a3 MG |
1543 | lcd.proto = lcd_proto; |
1544 | if (lcd_e_pin != PIN_NOT_SET) | |
1545 | lcd.pins.e = lcd_e_pin; | |
1546 | if (lcd_rs_pin != PIN_NOT_SET) | |
1547 | lcd.pins.rs = lcd_rs_pin; | |
1548 | if (lcd_rw_pin != PIN_NOT_SET) | |
1549 | lcd.pins.rw = lcd_rw_pin; | |
1550 | if (lcd_cl_pin != PIN_NOT_SET) | |
1551 | lcd.pins.cl = lcd_cl_pin; | |
1552 | if (lcd_da_pin != PIN_NOT_SET) | |
1553 | lcd.pins.da = lcd_da_pin; | |
1554 | if (lcd_bl_pin != PIN_NOT_SET) | |
1555 | lcd.pins.bl = lcd_bl_pin; | |
1556 | ||
698b1515 | 1557 | /* this is used to catch wrong and default values */ |
8037e2a3 MG |
1558 | if (lcd.width <= 0) |
1559 | lcd.width = DEFAULT_LCD_WIDTH; | |
1560 | if (lcd.bwidth <= 0) | |
1561 | lcd.bwidth = DEFAULT_LCD_BWIDTH; | |
1562 | if (lcd.hwidth <= 0) | |
1563 | lcd.hwidth = DEFAULT_LCD_HWIDTH; | |
1564 | if (lcd.height <= 0) | |
1565 | lcd.height = DEFAULT_LCD_HEIGHT; | |
1566 | ||
1567 | if (lcd.proto == LCD_PROTO_SERIAL) { /* SERIAL */ | |
698b1515 WT |
1568 | lcd_write_cmd = lcd_write_cmd_s; |
1569 | lcd_write_data = lcd_write_data_s; | |
1570 | lcd_clear_fast = lcd_clear_fast_s; | |
1571 | ||
8037e2a3 MG |
1572 | if (lcd.pins.cl == PIN_NOT_SET) |
1573 | lcd.pins.cl = DEFAULT_LCD_PIN_SCL; | |
1574 | if (lcd.pins.da == PIN_NOT_SET) | |
1575 | lcd.pins.da = DEFAULT_LCD_PIN_SDA; | |
698b1515 | 1576 | |
8037e2a3 | 1577 | } else if (lcd.proto == LCD_PROTO_PARALLEL) { /* PARALLEL */ |
698b1515 WT |
1578 | lcd_write_cmd = lcd_write_cmd_p8; |
1579 | lcd_write_data = lcd_write_data_p8; | |
1580 | lcd_clear_fast = lcd_clear_fast_p8; | |
1581 | ||
8037e2a3 MG |
1582 | if (lcd.pins.e == PIN_NOT_SET) |
1583 | lcd.pins.e = DEFAULT_LCD_PIN_E; | |
1584 | if (lcd.pins.rs == PIN_NOT_SET) | |
1585 | lcd.pins.rs = DEFAULT_LCD_PIN_RS; | |
1586 | if (lcd.pins.rw == PIN_NOT_SET) | |
1587 | lcd.pins.rw = DEFAULT_LCD_PIN_RW; | |
77943d31 SR |
1588 | } else { |
1589 | lcd_write_cmd = lcd_write_cmd_tilcd; | |
1590 | lcd_write_data = lcd_write_data_tilcd; | |
1591 | lcd_clear_fast = lcd_clear_fast_tilcd; | |
698b1515 | 1592 | } |
7005b584 | 1593 | |
8037e2a3 MG |
1594 | if (lcd.pins.bl == PIN_NOT_SET) |
1595 | lcd.pins.bl = DEFAULT_LCD_PIN_BL; | |
1596 | ||
1597 | if (lcd.pins.e == PIN_NOT_SET) | |
1598 | lcd.pins.e = PIN_NONE; | |
1599 | if (lcd.pins.rs == PIN_NOT_SET) | |
1600 | lcd.pins.rs = PIN_NONE; | |
1601 | if (lcd.pins.rw == PIN_NOT_SET) | |
1602 | lcd.pins.rw = PIN_NONE; | |
1603 | if (lcd.pins.bl == PIN_NOT_SET) | |
1604 | lcd.pins.bl = PIN_NONE; | |
1605 | if (lcd.pins.cl == PIN_NOT_SET) | |
1606 | lcd.pins.cl = PIN_NONE; | |
1607 | if (lcd.pins.da == PIN_NOT_SET) | |
1608 | lcd.pins.da = PIN_NONE; | |
1609 | ||
1610 | if (lcd.charset == NOT_SET) | |
1611 | lcd.charset = DEFAULT_LCD_CHARSET; | |
1612 | ||
1613 | if (lcd.charset == LCD_CHARSET_KS0074) | |
698b1515 WT |
1614 | lcd_char_conv = lcd_char_conv_ks0074; |
1615 | else | |
1616 | lcd_char_conv = NULL; | |
1617 | ||
8037e2a3 | 1618 | if (lcd.pins.bl != PIN_NONE) |
698b1515 WT |
1619 | init_scan_timer(); |
1620 | ||
8037e2a3 | 1621 | pin_to_bits(lcd.pins.e, lcd_bits[LCD_PORT_D][LCD_BIT_E], |
698b1515 | 1622 | lcd_bits[LCD_PORT_C][LCD_BIT_E]); |
8037e2a3 | 1623 | pin_to_bits(lcd.pins.rs, lcd_bits[LCD_PORT_D][LCD_BIT_RS], |
698b1515 | 1624 | lcd_bits[LCD_PORT_C][LCD_BIT_RS]); |
8037e2a3 | 1625 | pin_to_bits(lcd.pins.rw, lcd_bits[LCD_PORT_D][LCD_BIT_RW], |
698b1515 | 1626 | lcd_bits[LCD_PORT_C][LCD_BIT_RW]); |
8037e2a3 | 1627 | pin_to_bits(lcd.pins.bl, lcd_bits[LCD_PORT_D][LCD_BIT_BL], |
698b1515 | 1628 | lcd_bits[LCD_PORT_C][LCD_BIT_BL]); |
8037e2a3 | 1629 | pin_to_bits(lcd.pins.cl, lcd_bits[LCD_PORT_D][LCD_BIT_CL], |
698b1515 | 1630 | lcd_bits[LCD_PORT_C][LCD_BIT_CL]); |
8037e2a3 | 1631 | pin_to_bits(lcd.pins.da, lcd_bits[LCD_PORT_D][LCD_BIT_DA], |
698b1515 WT |
1632 | lcd_bits[LCD_PORT_C][LCD_BIT_DA]); |
1633 | ||
8c17893c NB |
1634 | /* |
1635 | * before this line, we must NOT send anything to the display. | |
698b1515 | 1636 | * Since lcd_init_display() needs to write data, we have to |
8c17893c NB |
1637 | * enable mark the LCD initialized just before. |
1638 | */ | |
6d8b588c | 1639 | lcd.initialized = true; |
698b1515 | 1640 | lcd_init_display(); |
7005b584 | 1641 | |
698b1515 | 1642 | /* display a short message */ |
7005b584 WT |
1643 | #ifdef CONFIG_PANEL_CHANGE_MESSAGE |
1644 | #ifdef CONFIG_PANEL_BOOT_MESSAGE | |
698b1515 | 1645 | panel_lcd_print("\x1b[Lc\x1b[Lb\x1b[L*" CONFIG_PANEL_BOOT_MESSAGE); |
7005b584 WT |
1646 | #endif |
1647 | #else | |
30f468b2 | 1648 | panel_lcd_print("\x1b[Lc\x1b[Lb\x1b[L*Linux-" UTS_RELEASE); |
7005b584 | 1649 | #endif |
429ccf05 | 1650 | /* clear the display on the next device opening */ |
6d8b588c | 1651 | lcd.must_clear = true; |
204a4f6d | 1652 | lcd_home(); |
7005b584 WT |
1653 | } |
1654 | ||
7005b584 WT |
1655 | /* |
1656 | * These are the file operation function for user access to /dev/keypad | |
1657 | */ | |
1658 | ||
698b1515 | 1659 | static ssize_t keypad_read(struct file *file, |
cce75f41 | 1660 | char __user *buf, size_t count, loff_t *ppos) |
698b1515 | 1661 | { |
698b1515 | 1662 | unsigned i = *ppos; |
cce75f41 | 1663 | char __user *tmp = buf; |
7005b584 | 1664 | |
698b1515 WT |
1665 | if (keypad_buflen == 0) { |
1666 | if (file->f_flags & O_NONBLOCK) | |
1667 | return -EAGAIN; | |
7005b584 | 1668 | |
310df69c AB |
1669 | if (wait_event_interruptible(keypad_read_wait, |
1670 | keypad_buflen != 0)) | |
698b1515 WT |
1671 | return -EINTR; |
1672 | } | |
7005b584 | 1673 | |
429ccf05 HH |
1674 | for (; count-- > 0 && (keypad_buflen > 0); |
1675 | ++i, ++tmp, --keypad_buflen) { | |
698b1515 WT |
1676 | put_user(keypad_buffer[keypad_start], tmp); |
1677 | keypad_start = (keypad_start + 1) % KEYPAD_BUFFER; | |
1678 | } | |
1679 | *ppos = i; | |
7005b584 | 1680 | |
698b1515 | 1681 | return tmp - buf; |
7005b584 WT |
1682 | } |
1683 | ||
698b1515 WT |
1684 | static int keypad_open(struct inode *inode, struct file *file) |
1685 | { | |
f4757af8 | 1686 | if (!atomic_dec_and_test(&keypad_available)) |
698b1515 | 1687 | return -EBUSY; /* open only once at a time */ |
7005b584 | 1688 | |
698b1515 WT |
1689 | if (file->f_mode & FMODE_WRITE) /* device is read-only */ |
1690 | return -EPERM; | |
7005b584 | 1691 | |
698b1515 | 1692 | keypad_buflen = 0; /* flush the buffer on opening */ |
698b1515 | 1693 | return 0; |
7005b584 WT |
1694 | } |
1695 | ||
698b1515 WT |
1696 | static int keypad_release(struct inode *inode, struct file *file) |
1697 | { | |
f4757af8 | 1698 | atomic_inc(&keypad_available); |
698b1515 | 1699 | return 0; |
7005b584 WT |
1700 | } |
1701 | ||
429ccf05 | 1702 | static const struct file_operations keypad_fops = { |
698b1515 WT |
1703 | .read = keypad_read, /* read */ |
1704 | .open = keypad_open, /* open */ | |
1705 | .release = keypad_release, /* close */ | |
6038f373 | 1706 | .llseek = default_llseek, |
7005b584 WT |
1707 | }; |
1708 | ||
1709 | static struct miscdevice keypad_dev = { | |
6c3773de MG |
1710 | .minor = KEYPAD_MINOR, |
1711 | .name = "keypad", | |
1712 | .fops = &keypad_fops, | |
7005b584 WT |
1713 | }; |
1714 | ||
36d2041a | 1715 | static void keypad_send_key(const char *string, int max_len) |
698b1515 | 1716 | { |
698b1515 | 1717 | /* send the key to the device only if a process is attached to it. */ |
f4757af8 | 1718 | if (!atomic_read(&keypad_available)) { |
698b1515 WT |
1719 | while (max_len-- && keypad_buflen < KEYPAD_BUFFER && *string) { |
1720 | keypad_buffer[(keypad_start + keypad_buflen++) % | |
1721 | KEYPAD_BUFFER] = *string++; | |
1722 | } | |
1723 | wake_up_interruptible(&keypad_read_wait); | |
7005b584 | 1724 | } |
7005b584 WT |
1725 | } |
1726 | ||
429ccf05 HH |
1727 | /* this function scans all the bits involving at least one logical signal, |
1728 | * and puts the results in the bitfield "phys_read" (one bit per established | |
1729 | * contact), and sets "phys_read_prev" to "phys_read". | |
7005b584 | 1730 | * |
429ccf05 HH |
1731 | * Note: to debounce input signals, we will only consider as switched a signal |
1732 | * which is stable across 2 measures. Signals which are different between two | |
1733 | * reads will be kept as they previously were in their logical form (phys_prev). | |
1734 | * A signal which has just switched will have a 1 in | |
1735 | * (phys_read ^ phys_read_prev). | |
7005b584 | 1736 | */ |
698b1515 WT |
1737 | static void phys_scan_contacts(void) |
1738 | { | |
1739 | int bit, bitval; | |
1740 | char oldval; | |
1741 | char bitmask; | |
1742 | char gndmask; | |
1743 | ||
1744 | phys_prev = phys_curr; | |
1745 | phys_read_prev = phys_read; | |
1746 | phys_read = 0; /* flush all signals */ | |
1747 | ||
429ccf05 HH |
1748 | /* keep track of old value, with all outputs disabled */ |
1749 | oldval = r_dtr(pprt) | scan_mask_o; | |
1750 | /* activate all keyboard outputs (active low) */ | |
1751 | w_dtr(pprt, oldval & ~scan_mask_o); | |
1752 | ||
1753 | /* will have a 1 for each bit set to gnd */ | |
1754 | bitmask = PNL_PINPUT(r_str(pprt)) & scan_mask_i; | |
1755 | /* disable all matrix signals */ | |
1756 | w_dtr(pprt, oldval); | |
698b1515 WT |
1757 | |
1758 | /* now that all outputs are cleared, the only active input bits are | |
1759 | * directly connected to the ground | |
7005b584 | 1760 | */ |
698b1515 | 1761 | |
429ccf05 HH |
1762 | /* 1 for each grounded input */ |
1763 | gndmask = PNL_PINPUT(r_str(pprt)) & scan_mask_i; | |
1764 | ||
1765 | /* grounded inputs are signals 40-44 */ | |
35fe0872 | 1766 | phys_read |= (__u64)gndmask << 40; |
7005b584 | 1767 | |
698b1515 | 1768 | if (bitmask != gndmask) { |
8c17893c NB |
1769 | /* |
1770 | * since clearing the outputs changed some inputs, we know | |
429ccf05 HH |
1771 | * that some input signals are currently tied to some outputs. |
1772 | * So we'll scan them. | |
698b1515 WT |
1773 | */ |
1774 | for (bit = 0; bit < 8; bit++) { | |
79f2af62 | 1775 | bitval = BIT(bit); |
7005b584 | 1776 | |
698b1515 WT |
1777 | if (!(scan_mask_o & bitval)) /* skip unused bits */ |
1778 | continue; | |
1779 | ||
1780 | w_dtr(pprt, oldval & ~bitval); /* enable this output */ | |
1781 | bitmask = PNL_PINPUT(r_str(pprt)) & ~gndmask; | |
35fe0872 | 1782 | phys_read |= (__u64)bitmask << (5 * bit); |
698b1515 WT |
1783 | } |
1784 | w_dtr(pprt, oldval); /* disable all outputs */ | |
7005b584 | 1785 | } |
8c17893c NB |
1786 | /* |
1787 | * this is easy: use old bits when they are flapping, | |
1788 | * use new ones when stable | |
1789 | */ | |
429ccf05 HH |
1790 | phys_curr = (phys_prev & (phys_read ^ phys_read_prev)) | |
1791 | (phys_read & ~(phys_read ^ phys_read_prev)); | |
1792 | } | |
1793 | ||
1794 | static inline int input_state_high(struct logical_input *input) | |
1795 | { | |
1796 | #if 0 | |
1797 | /* FIXME: | |
1798 | * this is an invalid test. It tries to catch | |
1799 | * transitions from single-key to multiple-key, but | |
1800 | * doesn't take into account the contacts polarity. | |
1801 | * The only solution to the problem is to parse keys | |
1802 | * from the most complex to the simplest combinations, | |
1803 | * and mark them as 'caught' once a combination | |
1804 | * matches, then unmatch it for all other ones. | |
1805 | */ | |
1806 | ||
1807 | /* try to catch dangerous transitions cases : | |
1808 | * someone adds a bit, so this signal was a false | |
1809 | * positive resulting from a transition. We should | |
1810 | * invalidate the signal immediately and not call the | |
1811 | * release function. | |
1812 | * eg: 0 -(press A)-> A -(press B)-> AB : don't match A's release. | |
1813 | */ | |
fdf4a494 DB |
1814 | if (((phys_prev & input->mask) == input->value) && |
1815 | ((phys_curr & input->mask) > input->value)) { | |
429ccf05 HH |
1816 | input->state = INPUT_ST_LOW; /* invalidate */ |
1817 | return 1; | |
1818 | } | |
1819 | #endif | |
1820 | ||
1821 | if ((phys_curr & input->mask) == input->value) { | |
1822 | if ((input->type == INPUT_TYPE_STD) && | |
1823 | (input->high_timer == 0)) { | |
1824 | input->high_timer++; | |
b565b3fb | 1825 | if (input->u.std.press_fct) |
429ccf05 HH |
1826 | input->u.std.press_fct(input->u.std.press_data); |
1827 | } else if (input->type == INPUT_TYPE_KBD) { | |
1828 | /* will turn on the light */ | |
1829 | keypressed = 1; | |
1830 | ||
1831 | if (input->high_timer == 0) { | |
1832 | char *press_str = input->u.kbd.press_str; | |
c3ed0afc | 1833 | |
e6626de5 JC |
1834 | if (press_str[0]) { |
1835 | int s = sizeof(input->u.kbd.press_str); | |
c3ed0afc | 1836 | |
e6626de5 JC |
1837 | keypad_send_key(press_str, s); |
1838 | } | |
429ccf05 HH |
1839 | } |
1840 | ||
1841 | if (input->u.kbd.repeat_str[0]) { | |
1842 | char *repeat_str = input->u.kbd.repeat_str; | |
c3ed0afc | 1843 | |
429ccf05 | 1844 | if (input->high_timer >= KEYPAD_REP_START) { |
e6626de5 | 1845 | int s = sizeof(input->u.kbd.repeat_str); |
c3ed0afc | 1846 | |
429ccf05 | 1847 | input->high_timer -= KEYPAD_REP_DELAY; |
e6626de5 | 1848 | keypad_send_key(repeat_str, s); |
429ccf05 HH |
1849 | } |
1850 | /* we will need to come back here soon */ | |
1851 | inputs_stable = 0; | |
1852 | } | |
1853 | ||
1854 | if (input->high_timer < 255) | |
1855 | input->high_timer++; | |
1856 | } | |
1857 | return 1; | |
429ccf05 | 1858 | } |
083b3638 VH |
1859 | |
1860 | /* else signal falling down. Let's fall through. */ | |
1861 | input->state = INPUT_ST_FALLING; | |
1862 | input->fall_timer = 0; | |
1863 | ||
429ccf05 HH |
1864 | return 0; |
1865 | } | |
1866 | ||
1867 | static inline void input_state_falling(struct logical_input *input) | |
1868 | { | |
1869 | #if 0 | |
1870 | /* FIXME !!! same comment as in input_state_high */ | |
fdf4a494 DB |
1871 | if (((phys_prev & input->mask) == input->value) && |
1872 | ((phys_curr & input->mask) > input->value)) { | |
429ccf05 HH |
1873 | input->state = INPUT_ST_LOW; /* invalidate */ |
1874 | return; | |
1875 | } | |
1876 | #endif | |
1877 | ||
1878 | if ((phys_curr & input->mask) == input->value) { | |
1879 | if (input->type == INPUT_TYPE_KBD) { | |
1880 | /* will turn on the light */ | |
1881 | keypressed = 1; | |
1882 | ||
1883 | if (input->u.kbd.repeat_str[0]) { | |
1884 | char *repeat_str = input->u.kbd.repeat_str; | |
c3ed0afc | 1885 | |
e6626de5 JC |
1886 | if (input->high_timer >= KEYPAD_REP_START) { |
1887 | int s = sizeof(input->u.kbd.repeat_str); | |
c3ed0afc | 1888 | |
429ccf05 | 1889 | input->high_timer -= KEYPAD_REP_DELAY; |
e6626de5 JC |
1890 | keypad_send_key(repeat_str, s); |
1891 | } | |
429ccf05 HH |
1892 | /* we will need to come back here soon */ |
1893 | inputs_stable = 0; | |
1894 | } | |
1895 | ||
1896 | if (input->high_timer < 255) | |
1897 | input->high_timer++; | |
1898 | } | |
1899 | input->state = INPUT_ST_HIGH; | |
1900 | } else if (input->fall_timer >= input->fall_time) { | |
1901 | /* call release event */ | |
1902 | if (input->type == INPUT_TYPE_STD) { | |
1903 | void (*release_fct)(int) = input->u.std.release_fct; | |
c3ed0afc | 1904 | |
b565b3fb | 1905 | if (release_fct) |
429ccf05 HH |
1906 | release_fct(input->u.std.release_data); |
1907 | } else if (input->type == INPUT_TYPE_KBD) { | |
1908 | char *release_str = input->u.kbd.release_str; | |
c3ed0afc | 1909 | |
e6626de5 JC |
1910 | if (release_str[0]) { |
1911 | int s = sizeof(input->u.kbd.release_str); | |
c3ed0afc | 1912 | |
e6626de5 JC |
1913 | keypad_send_key(release_str, s); |
1914 | } | |
429ccf05 HH |
1915 | } |
1916 | ||
1917 | input->state = INPUT_ST_LOW; | |
1918 | } else { | |
1919 | input->fall_timer++; | |
1920 | inputs_stable = 0; | |
1921 | } | |
7005b584 WT |
1922 | } |
1923 | ||
698b1515 WT |
1924 | static void panel_process_inputs(void) |
1925 | { | |
1926 | struct list_head *item; | |
1927 | struct logical_input *input; | |
7005b584 | 1928 | |
698b1515 WT |
1929 | keypressed = 0; |
1930 | inputs_stable = 1; | |
1931 | list_for_each(item, &logical_inputs) { | |
1932 | input = list_entry(item, struct logical_input, list); | |
1933 | ||
1934 | switch (input->state) { | |
1935 | case INPUT_ST_LOW: | |
1936 | if ((phys_curr & input->mask) != input->value) | |
1937 | break; | |
429ccf05 HH |
1938 | /* if all needed ones were already set previously, |
1939 | * this means that this logical signal has been | |
1940 | * activated by the releasing of another combined | |
1941 | * signal, so we don't want to match. | |
1942 | * eg: AB -(release B)-> A -(release A)-> 0 : | |
1943 | * don't match A. | |
698b1515 WT |
1944 | */ |
1945 | if ((phys_prev & input->mask) == input->value) | |
1946 | break; | |
1947 | input->rise_timer = 0; | |
1948 | input->state = INPUT_ST_RISING; | |
1949 | /* no break here, fall through */ | |
1950 | case INPUT_ST_RISING: | |
1951 | if ((phys_curr & input->mask) != input->value) { | |
1952 | input->state = INPUT_ST_LOW; | |
1953 | break; | |
1954 | } | |
1955 | if (input->rise_timer < input->rise_time) { | |
1956 | inputs_stable = 0; | |
1957 | input->rise_timer++; | |
1958 | break; | |
1959 | } | |
1960 | input->high_timer = 0; | |
1961 | input->state = INPUT_ST_HIGH; | |
1962 | /* no break here, fall through */ | |
1963 | case INPUT_ST_HIGH: | |
429ccf05 | 1964 | if (input_state_high(input)) |
698b1515 | 1965 | break; |
698b1515 WT |
1966 | /* no break here, fall through */ |
1967 | case INPUT_ST_FALLING: | |
429ccf05 | 1968 | input_state_falling(input); |
698b1515 WT |
1969 | } |
1970 | } | |
1971 | } | |
7005b584 | 1972 | |
698b1515 WT |
1973 | static void panel_scan_timer(void) |
1974 | { | |
a8b2580b | 1975 | if (keypad.enabled && keypad_initialized) { |
d4d2dbca | 1976 | if (spin_trylock_irq(&pprt_lock)) { |
698b1515 | 1977 | phys_scan_contacts(); |
429ccf05 HH |
1978 | |
1979 | /* no need for the parport anymore */ | |
d4d2dbca | 1980 | spin_unlock_irq(&pprt_lock); |
7005b584 WT |
1981 | } |
1982 | ||
698b1515 WT |
1983 | if (!inputs_stable || phys_curr != phys_prev) |
1984 | panel_process_inputs(); | |
7005b584 | 1985 | } |
7005b584 | 1986 | |
6d8b588c | 1987 | if (lcd.enabled && lcd.initialized) { |
698b1515 | 1988 | if (keypressed) { |
832bf28c SS |
1989 | if (lcd.light_tempo == 0 && |
1990 | ((lcd.flags & LCD_FLAG_L) == 0)) | |
698b1515 | 1991 | lcd_backlight(1); |
6d8b588c MG |
1992 | lcd.light_tempo = FLASH_LIGHT_TEMPO; |
1993 | } else if (lcd.light_tempo > 0) { | |
1994 | lcd.light_tempo--; | |
832bf28c SS |
1995 | if (lcd.light_tempo == 0 && |
1996 | ((lcd.flags & LCD_FLAG_L) == 0)) | |
698b1515 WT |
1997 | lcd_backlight(0); |
1998 | } | |
1999 | } | |
2000 | ||
2001 | mod_timer(&scan_timer, jiffies + INPUT_POLL_TIME); | |
7005b584 WT |
2002 | } |
2003 | ||
698b1515 WT |
2004 | static void init_scan_timer(void) |
2005 | { | |
b565b3fb | 2006 | if (scan_timer.function) |
698b1515 WT |
2007 | return; /* already started */ |
2008 | ||
8f6e36c5 | 2009 | setup_timer(&scan_timer, (void *)&panel_scan_timer, 0); |
698b1515 | 2010 | scan_timer.expires = jiffies + INPUT_POLL_TIME; |
698b1515 | 2011 | add_timer(&scan_timer); |
7005b584 WT |
2012 | } |
2013 | ||
2014 | /* converts a name of the form "({BbAaPpSsEe}{01234567-})*" to a series of bits. | |
429ccf05 HH |
2015 | * if <omask> or <imask> are non-null, they will be or'ed with the bits |
2016 | * corresponding to out and in bits respectively. | |
7005b584 WT |
2017 | * returns 1 if ok, 0 if error (in which case, nothing is written). |
2018 | */ | |
35fe0872 | 2019 | static u8 input_name2mask(const char *name, __u64 *mask, __u64 *value, |
d938e1eb | 2020 | u8 *imask, u8 *omask) |
698b1515 | 2021 | { |
8aa7307b | 2022 | const char sigtab[] = "EeSsPpAaBb"; |
d938e1eb | 2023 | u8 im, om; |
35fe0872 | 2024 | __u64 m, v; |
698b1515 | 2025 | |
d12f27e8 KS |
2026 | om = 0; |
2027 | im = 0; | |
2d53426b DB |
2028 | m = 0ULL; |
2029 | v = 0ULL; | |
698b1515 WT |
2030 | while (*name) { |
2031 | int in, out, bit, neg; | |
8aa7307b | 2032 | const char *idx; |
c3ed0afc | 2033 | |
8aa7307b KS |
2034 | idx = strchr(sigtab, *name); |
2035 | if (!idx) | |
698b1515 | 2036 | return 0; /* input name not found */ |
8aa7307b KS |
2037 | |
2038 | in = idx - sigtab; | |
698b1515 WT |
2039 | neg = (in & 1); /* odd (lower) names are negated */ |
2040 | in >>= 1; | |
79f2af62 | 2041 | im |= BIT(in); |
698b1515 WT |
2042 | |
2043 | name++; | |
52ebf93f | 2044 | if (*name >= '0' && *name <= '7') { |
698b1515 | 2045 | out = *name - '0'; |
79f2af62 | 2046 | om |= BIT(out); |
3ac76904 | 2047 | } else if (*name == '-') { |
698b1515 | 2048 | out = 8; |
3ac76904 | 2049 | } else { |
698b1515 | 2050 | return 0; /* unknown bit name */ |
3ac76904 | 2051 | } |
698b1515 WT |
2052 | |
2053 | bit = (out * 5) + in; | |
2054 | ||
2055 | m |= 1ULL << bit; | |
2056 | if (!neg) | |
2057 | v |= 1ULL << bit; | |
2058 | name++; | |
7005b584 | 2059 | } |
698b1515 WT |
2060 | *mask = m; |
2061 | *value = v; | |
2062 | if (imask) | |
2063 | *imask |= im; | |
2064 | if (omask) | |
2065 | *omask |= om; | |
2066 | return 1; | |
7005b584 WT |
2067 | } |
2068 | ||
2069 | /* tries to bind a key to the signal name <name>. The key will send the | |
2070 | * strings <press>, <repeat>, <release> for these respective events. | |
2071 | * Returns the pointer to the new key if ok, NULL if the key could not be bound. | |
2072 | */ | |
36d2041a PH |
2073 | static struct logical_input *panel_bind_key(const char *name, const char *press, |
2074 | const char *repeat, | |
2075 | const char *release) | |
698b1515 WT |
2076 | { |
2077 | struct logical_input *key; | |
2078 | ||
fdf4a494 | 2079 | key = kzalloc(sizeof(*key), GFP_KERNEL); |
eb073a9b | 2080 | if (!key) |
698b1515 | 2081 | return NULL; |
eb073a9b | 2082 | |
698b1515 | 2083 | if (!input_name2mask(name, &key->mask, &key->value, &scan_mask_i, |
cb46f472 KV |
2084 | &scan_mask_o)) { |
2085 | kfree(key); | |
698b1515 | 2086 | return NULL; |
cb46f472 | 2087 | } |
698b1515 WT |
2088 | |
2089 | key->type = INPUT_TYPE_KBD; | |
2090 | key->state = INPUT_ST_LOW; | |
2091 | key->rise_time = 1; | |
2092 | key->fall_time = 1; | |
7005b584 | 2093 | |
698b1515 WT |
2094 | strncpy(key->u.kbd.press_str, press, sizeof(key->u.kbd.press_str)); |
2095 | strncpy(key->u.kbd.repeat_str, repeat, sizeof(key->u.kbd.repeat_str)); | |
2096 | strncpy(key->u.kbd.release_str, release, | |
2097 | sizeof(key->u.kbd.release_str)); | |
2098 | list_add(&key->list, &logical_inputs); | |
2099 | return key; | |
7005b584 WT |
2100 | } |
2101 | ||
63023177 | 2102 | #if 0 |
7005b584 WT |
2103 | /* tries to bind a callback function to the signal name <name>. The function |
2104 | * <press_fct> will be called with the <press_data> arg when the signal is | |
2105 | * activated, and so on for <release_fct>/<release_data> | |
429ccf05 HH |
2106 | * Returns the pointer to the new signal if ok, NULL if the signal could not |
2107 | * be bound. | |
7005b584 WT |
2108 | */ |
2109 | static struct logical_input *panel_bind_callback(char *name, | |
68d386bf | 2110 | void (*press_fct)(int), |
698b1515 | 2111 | int press_data, |
68d386bf | 2112 | void (*release_fct)(int), |
698b1515 WT |
2113 | int release_data) |
2114 | { | |
2115 | struct logical_input *callback; | |
2116 | ||
fdf4a494 | 2117 | callback = kmalloc(sizeof(*callback), GFP_KERNEL); |
eb073a9b | 2118 | if (!callback) |
698b1515 | 2119 | return NULL; |
eb073a9b | 2120 | |
698b1515 WT |
2121 | memset(callback, 0, sizeof(struct logical_input)); |
2122 | if (!input_name2mask(name, &callback->mask, &callback->value, | |
2123 | &scan_mask_i, &scan_mask_o)) | |
2124 | return NULL; | |
2125 | ||
2126 | callback->type = INPUT_TYPE_STD; | |
2127 | callback->state = INPUT_ST_LOW; | |
2128 | callback->rise_time = 1; | |
2129 | callback->fall_time = 1; | |
2130 | callback->u.std.press_fct = press_fct; | |
2131 | callback->u.std.press_data = press_data; | |
2132 | callback->u.std.release_fct = release_fct; | |
2133 | callback->u.std.release_data = release_data; | |
2134 | list_add(&callback->list, &logical_inputs); | |
2135 | return callback; | |
7005b584 | 2136 | } |
63023177 | 2137 | #endif |
7005b584 | 2138 | |
698b1515 WT |
2139 | static void keypad_init(void) |
2140 | { | |
2141 | int keynum; | |
c3ed0afc | 2142 | |
698b1515 WT |
2143 | init_waitqueue_head(&keypad_read_wait); |
2144 | keypad_buflen = 0; /* flushes any eventual noisy keystroke */ | |
7005b584 | 2145 | |
698b1515 | 2146 | /* Let's create all known keys */ |
7005b584 | 2147 | |
698b1515 WT |
2148 | for (keynum = 0; keypad_profile[keynum][0][0]; keynum++) { |
2149 | panel_bind_key(keypad_profile[keynum][0], | |
2150 | keypad_profile[keynum][1], | |
2151 | keypad_profile[keynum][2], | |
2152 | keypad_profile[keynum][3]); | |
2153 | } | |
7005b584 | 2154 | |
698b1515 WT |
2155 | init_scan_timer(); |
2156 | keypad_initialized = 1; | |
7005b584 WT |
2157 | } |
2158 | ||
7005b584 WT |
2159 | /**************************************************/ |
2160 | /* device initialization */ | |
2161 | /**************************************************/ | |
2162 | ||
698b1515 WT |
2163 | static int panel_notify_sys(struct notifier_block *this, unsigned long code, |
2164 | void *unused) | |
2165 | { | |
6d8b588c | 2166 | if (lcd.enabled && lcd.initialized) { |
698b1515 WT |
2167 | switch (code) { |
2168 | case SYS_DOWN: | |
2169 | panel_lcd_print | |
2170 | ("\x0cReloading\nSystem...\x1b[Lc\x1b[Lb\x1b[L+"); | |
2171 | break; | |
2172 | case SYS_HALT: | |
2173 | panel_lcd_print | |
2174 | ("\x0cSystem Halted.\x1b[Lc\x1b[Lb\x1b[L+"); | |
2175 | break; | |
2176 | case SYS_POWER_OFF: | |
2177 | panel_lcd_print("\x0cPower off.\x1b[Lc\x1b[Lb\x1b[L+"); | |
2178 | break; | |
2179 | default: | |
2180 | break; | |
2181 | } | |
7005b584 | 2182 | } |
698b1515 | 2183 | return NOTIFY_DONE; |
7005b584 WT |
2184 | } |
2185 | ||
2186 | static struct notifier_block panel_notifier = { | |
2187 | panel_notify_sys, | |
2188 | NULL, | |
2189 | 0 | |
2190 | }; | |
2191 | ||
698b1515 | 2192 | static void panel_attach(struct parport *port) |
7005b584 | 2193 | { |
9be83c0a SM |
2194 | struct pardev_cb panel_cb; |
2195 | ||
698b1515 WT |
2196 | if (port->number != parport) |
2197 | return; | |
2198 | ||
2199 | if (pprt) { | |
eb073a9b TY |
2200 | pr_err("%s: port->number=%d parport=%d, already registered!\n", |
2201 | __func__, port->number, parport); | |
698b1515 WT |
2202 | return; |
2203 | } | |
2204 | ||
9be83c0a SM |
2205 | memset(&panel_cb, 0, sizeof(panel_cb)); |
2206 | panel_cb.private = &pprt; | |
2207 | /* panel_cb.flags = 0 should be PARPORT_DEV_EXCL? */ | |
2208 | ||
2209 | pprt = parport_register_dev_model(port, "panel", &panel_cb, 0); | |
b565b3fb | 2210 | if (!pprt) { |
eb073a9b TY |
2211 | pr_err("%s: port->number=%d parport=%d, parport_register_device() failed\n", |
2212 | __func__, port->number, parport); | |
10f3f5b7 KV |
2213 | return; |
2214 | } | |
698b1515 WT |
2215 | |
2216 | if (parport_claim(pprt)) { | |
eb073a9b TY |
2217 | pr_err("could not claim access to parport%d. Aborting.\n", |
2218 | parport); | |
10f3f5b7 | 2219 | goto err_unreg_device; |
698b1515 WT |
2220 | } |
2221 | ||
429ccf05 HH |
2222 | /* must init LCD first, just in case an IRQ from the keypad is |
2223 | * generated at keypad init | |
2224 | */ | |
a8b2580b | 2225 | if (lcd.enabled) { |
698b1515 | 2226 | lcd_init(); |
10f3f5b7 KV |
2227 | if (misc_register(&lcd_dev)) |
2228 | goto err_unreg_device; | |
698b1515 WT |
2229 | } |
2230 | ||
a8b2580b | 2231 | if (keypad.enabled) { |
698b1515 | 2232 | keypad_init(); |
10f3f5b7 KV |
2233 | if (misc_register(&keypad_dev)) |
2234 | goto err_lcd_unreg; | |
698b1515 | 2235 | } |
bb046fef | 2236 | register_reboot_notifier(&panel_notifier); |
10f3f5b7 KV |
2237 | return; |
2238 | ||
2239 | err_lcd_unreg: | |
a8b2580b | 2240 | if (lcd.enabled) |
10f3f5b7 KV |
2241 | misc_deregister(&lcd_dev); |
2242 | err_unreg_device: | |
2243 | parport_unregister_device(pprt); | |
2244 | pprt = NULL; | |
7005b584 WT |
2245 | } |
2246 | ||
698b1515 | 2247 | static void panel_detach(struct parport *port) |
7005b584 | 2248 | { |
698b1515 WT |
2249 | if (port->number != parport) |
2250 | return; | |
2251 | ||
2252 | if (!pprt) { | |
eb073a9b TY |
2253 | pr_err("%s: port->number=%d parport=%d, nothing to unregister.\n", |
2254 | __func__, port->number, parport); | |
698b1515 WT |
2255 | return; |
2256 | } | |
b565b3fb | 2257 | if (scan_timer.function) |
7d98c63e | 2258 | del_timer_sync(&scan_timer); |
698b1515 | 2259 | |
3f77b439 GU |
2260 | if (keypad.enabled) { |
2261 | misc_deregister(&keypad_dev); | |
2262 | keypad_initialized = 0; | |
2263 | } | |
698b1515 | 2264 | |
3f77b439 GU |
2265 | if (lcd.enabled) { |
2266 | panel_lcd_print("\x0cLCD driver unloaded.\x1b[Lc\x1b[Lb\x1b[L-"); | |
2267 | misc_deregister(&lcd_dev); | |
2268 | lcd.initialized = false; | |
0b0595bf | 2269 | } |
3f77b439 GU |
2270 | |
2271 | /* TODO: free all input signals */ | |
2272 | parport_release(pprt); | |
2273 | parport_unregister_device(pprt); | |
2274 | pprt = NULL; | |
2275 | unregister_reboot_notifier(&panel_notifier); | |
7005b584 WT |
2276 | } |
2277 | ||
2278 | static struct parport_driver panel_driver = { | |
698b1515 | 2279 | .name = "panel", |
9be83c0a | 2280 | .match_port = panel_attach, |
698b1515 | 2281 | .detach = panel_detach, |
9be83c0a | 2282 | .devmodel = true, |
7005b584 WT |
2283 | }; |
2284 | ||
2285 | /* init function */ | |
d9114767 | 2286 | static int __init panel_init_module(void) |
698b1515 | 2287 | { |
e134201b | 2288 | int selected_keypad_type = NOT_SET, err; |
698b1515 | 2289 | |
698b1515 WT |
2290 | /* take care of an eventual profile */ |
2291 | switch (profile) { | |
429ccf05 HH |
2292 | case PANEL_PROFILE_CUSTOM: |
2293 | /* custom profile */ | |
87b8e0c8 MG |
2294 | selected_keypad_type = DEFAULT_KEYPAD_TYPE; |
2295 | selected_lcd_type = DEFAULT_LCD_TYPE; | |
698b1515 | 2296 | break; |
429ccf05 HH |
2297 | case PANEL_PROFILE_OLD: |
2298 | /* 8 bits, 2*16, old keypad */ | |
87b8e0c8 MG |
2299 | selected_keypad_type = KEYPAD_TYPE_OLD; |
2300 | selected_lcd_type = LCD_TYPE_OLD; | |
2301 | ||
2302 | /* TODO: This two are a little hacky, sort it out later */ | |
2d35bcf6 | 2303 | if (lcd_width == NOT_SET) |
698b1515 | 2304 | lcd_width = 16; |
2d35bcf6 | 2305 | if (lcd_hwidth == NOT_SET) |
698b1515 WT |
2306 | lcd_hwidth = 16; |
2307 | break; | |
429ccf05 HH |
2308 | case PANEL_PROFILE_NEW: |
2309 | /* serial, 2*16, new keypad */ | |
87b8e0c8 MG |
2310 | selected_keypad_type = KEYPAD_TYPE_NEW; |
2311 | selected_lcd_type = LCD_TYPE_KS0074; | |
698b1515 | 2312 | break; |
429ccf05 HH |
2313 | case PANEL_PROFILE_HANTRONIX: |
2314 | /* 8 bits, 2*16 hantronix-like, no keypad */ | |
87b8e0c8 MG |
2315 | selected_keypad_type = KEYPAD_TYPE_NONE; |
2316 | selected_lcd_type = LCD_TYPE_HANTRONIX; | |
698b1515 | 2317 | break; |
429ccf05 HH |
2318 | case PANEL_PROFILE_NEXCOM: |
2319 | /* generic 8 bits, 2*16, nexcom keypad, eg. Nexcom. */ | |
87b8e0c8 MG |
2320 | selected_keypad_type = KEYPAD_TYPE_NEXCOM; |
2321 | selected_lcd_type = LCD_TYPE_NEXCOM; | |
698b1515 | 2322 | break; |
429ccf05 HH |
2323 | case PANEL_PROFILE_LARGE: |
2324 | /* 8 bits, 2*40, old keypad */ | |
87b8e0c8 MG |
2325 | selected_keypad_type = KEYPAD_TYPE_OLD; |
2326 | selected_lcd_type = LCD_TYPE_OLD; | |
698b1515 WT |
2327 | break; |
2328 | } | |
2329 | ||
87b8e0c8 MG |
2330 | /* |
2331 | * Overwrite selection with module param values (both keypad and lcd), | |
2332 | * where the deprecated params have lower prio. | |
2333 | */ | |
1a4b2e3e | 2334 | if (keypad_enabled != NOT_SET) |
87b8e0c8 | 2335 | selected_keypad_type = keypad_enabled; |
1a4b2e3e | 2336 | if (keypad_type != NOT_SET) |
87b8e0c8 MG |
2337 | selected_keypad_type = keypad_type; |
2338 | ||
2339 | keypad.enabled = (selected_keypad_type > 0); | |
2340 | ||
1a4b2e3e | 2341 | if (lcd_enabled != NOT_SET) |
87b8e0c8 | 2342 | selected_lcd_type = lcd_enabled; |
1a4b2e3e | 2343 | if (lcd_type != NOT_SET) |
87b8e0c8 MG |
2344 | selected_lcd_type = lcd_type; |
2345 | ||
2346 | lcd.enabled = (selected_lcd_type > 0); | |
698b1515 | 2347 | |
733345ec SM |
2348 | if (lcd.enabled) { |
2349 | /* | |
2350 | * Init lcd struct with load-time values to preserve exact | |
2351 | * current functionality (at least for now). | |
2352 | */ | |
2353 | lcd.height = lcd_height; | |
2354 | lcd.width = lcd_width; | |
2355 | lcd.bwidth = lcd_bwidth; | |
2356 | lcd.hwidth = lcd_hwidth; | |
2357 | lcd.charset = lcd_charset; | |
2358 | lcd.proto = lcd_proto; | |
2359 | lcd.pins.e = lcd_e_pin; | |
2360 | lcd.pins.rs = lcd_rs_pin; | |
2361 | lcd.pins.rw = lcd_rw_pin; | |
2362 | lcd.pins.cl = lcd_cl_pin; | |
2363 | lcd.pins.da = lcd_da_pin; | |
2364 | lcd.pins.bl = lcd_bl_pin; | |
2365 | ||
2366 | /* Leave it for now, just in case */ | |
2367 | lcd.esc_seq.len = -1; | |
2368 | } | |
2369 | ||
87b8e0c8 | 2370 | switch (selected_keypad_type) { |
698b1515 WT |
2371 | case KEYPAD_TYPE_OLD: |
2372 | keypad_profile = old_keypad_profile; | |
2373 | break; | |
2374 | case KEYPAD_TYPE_NEW: | |
2375 | keypad_profile = new_keypad_profile; | |
2376 | break; | |
2377 | case KEYPAD_TYPE_NEXCOM: | |
2378 | keypad_profile = nexcom_keypad_profile; | |
2379 | break; | |
2380 | default: | |
2381 | keypad_profile = NULL; | |
2382 | break; | |
2383 | } | |
2384 | ||
a8b2580b | 2385 | if (!lcd.enabled && !keypad.enabled) { |
f43de77c | 2386 | /* no device enabled, let's exit */ |
30f468b2 | 2387 | pr_err("panel driver disabled.\n"); |
698b1515 | 2388 | return -ENODEV; |
7005b584 | 2389 | } |
7005b584 | 2390 | |
e134201b SM |
2391 | err = parport_register_driver(&panel_driver); |
2392 | if (err) { | |
f43de77c | 2393 | pr_err("could not register with parport. Aborting.\n"); |
e134201b | 2394 | return err; |
f43de77c SM |
2395 | } |
2396 | ||
698b1515 | 2397 | if (pprt) |
30f468b2 GU |
2398 | pr_info("panel driver registered on parport%d (io=0x%lx).\n", |
2399 | parport, pprt->port->base); | |
698b1515 | 2400 | else |
30f468b2 | 2401 | pr_info("panel driver not yet registered\n"); |
698b1515 WT |
2402 | return 0; |
2403 | } | |
7005b584 | 2404 | |
f6d1fcfe | 2405 | static void __exit panel_cleanup_module(void) |
698b1515 | 2406 | { |
698b1515 | 2407 | parport_unregister_driver(&panel_driver); |
7005b584 | 2408 | } |
7005b584 | 2409 | |
7005b584 WT |
2410 | module_init(panel_init_module); |
2411 | module_exit(panel_cleanup_module); | |
2412 | MODULE_AUTHOR("Willy Tarreau"); | |
2413 | MODULE_LICENSE("GPL"); | |
7005b584 WT |
2414 | |
2415 | /* | |
2416 | * Local variables: | |
2417 | * c-indent-level: 4 | |
2418 | * tab-width: 8 | |
2419 | * End: | |
2420 | */ |