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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 | ||
37 | #include <linux/module.h> | |
38 | ||
39 | #include <linux/types.h> | |
40 | #include <linux/errno.h> | |
41 | #include <linux/signal.h> | |
42 | #include <linux/sched.h> | |
43 | #include <linux/spinlock.h> | |
44 | #include <linux/smp_lock.h> | |
45 | #include <linux/interrupt.h> | |
46 | #include <linux/miscdevice.h> | |
698b1515 | 47 | #include <linux/slab.h> |
7005b584 WT |
48 | #include <linux/ioport.h> |
49 | #include <linux/fcntl.h> | |
50 | #include <linux/init.h> | |
51 | #include <linux/delay.h> | |
52 | #include <linux/ctype.h> | |
53 | #include <linux/parport.h> | |
54 | #include <linux/version.h> | |
55 | #include <linux/list.h> | |
56 | #include <linux/notifier.h> | |
57 | #include <linux/reboot.h> | |
58 | #include <linux/utsrelease.h> | |
59 | ||
698b1515 | 60 | #include <linux/io.h> |
7005b584 WT |
61 | #include <asm/uaccess.h> |
62 | #include <asm/system.h> | |
63 | ||
7005b584 WT |
64 | #define LCD_MINOR 156 |
65 | #define KEYPAD_MINOR 185 | |
7005b584 WT |
66 | |
67 | #define PANEL_VERSION "0.9.5" | |
68 | ||
69 | #define LCD_MAXBYTES 256 /* max burst write */ | |
70 | ||
7005b584 WT |
71 | #define KEYPAD_BUFFER 64 |
72 | #define INPUT_POLL_TIME (HZ/50) /* poll the keyboard this every second */ | |
73 | #define KEYPAD_REP_START (10) /* a key starts to repeat after this times INPUT_POLL_TIME */ | |
74 | #define KEYPAD_REP_DELAY (2) /* a key repeats this times INPUT_POLL_TIME */ | |
75 | ||
76 | #define FLASH_LIGHT_TEMPO (200) /* keep the light on this times INPUT_POLL_TIME for each flash */ | |
77 | ||
78 | /* converts an r_str() input to an active high, bits string : 000BAOSE */ | |
79 | #define PNL_PINPUT(a) ((((unsigned char)(a)) ^ 0x7F) >> 3) | |
80 | ||
698b1515 WT |
81 | #define PNL_PBUSY 0x80 /* inverted input, active low */ |
82 | #define PNL_PACK 0x40 /* direct input, active low */ | |
83 | #define PNL_POUTPA 0x20 /* direct input, active high */ | |
84 | #define PNL_PSELECD 0x10 /* direct input, active high */ | |
85 | #define PNL_PERRORP 0x08 /* direct input, active low */ | |
7005b584 | 86 | |
698b1515 WT |
87 | #define PNL_PBIDIR 0x20 /* bi-directional ports */ |
88 | #define PNL_PINTEN 0x10 /* high to read data in or-ed with data out */ | |
89 | #define PNL_PSELECP 0x08 /* inverted output, active low */ | |
90 | #define PNL_PINITP 0x04 /* direct output, active low */ | |
91 | #define PNL_PAUTOLF 0x02 /* inverted output, active low */ | |
92 | #define PNL_PSTROBE 0x01 /* inverted output */ | |
7005b584 WT |
93 | |
94 | #define PNL_PD0 0x01 | |
95 | #define PNL_PD1 0x02 | |
96 | #define PNL_PD2 0x04 | |
97 | #define PNL_PD3 0x08 | |
98 | #define PNL_PD4 0x10 | |
99 | #define PNL_PD5 0x20 | |
100 | #define PNL_PD6 0x40 | |
101 | #define PNL_PD7 0x80 | |
102 | ||
103 | #define PIN_NONE 0 | |
104 | #define PIN_STROBE 1 | |
105 | #define PIN_D0 2 | |
106 | #define PIN_D1 3 | |
107 | #define PIN_D2 4 | |
108 | #define PIN_D3 5 | |
109 | #define PIN_D4 6 | |
110 | #define PIN_D5 7 | |
111 | #define PIN_D6 8 | |
112 | #define PIN_D7 9 | |
113 | #define PIN_AUTOLF 14 | |
114 | #define PIN_INITP 16 | |
115 | #define PIN_SELECP 17 | |
116 | #define PIN_NOT_SET 127 | |
117 | ||
7005b584 WT |
118 | #define LCD_FLAG_S 0x0001 |
119 | #define LCD_FLAG_ID 0x0002 | |
120 | #define LCD_FLAG_B 0x0004 /* blink on */ | |
121 | #define LCD_FLAG_C 0x0008 /* cursor on */ | |
122 | #define LCD_FLAG_D 0x0010 /* display on */ | |
123 | #define LCD_FLAG_F 0x0020 /* large font mode */ | |
124 | #define LCD_FLAG_N 0x0040 /* 2-rows mode */ | |
125 | #define LCD_FLAG_L 0x0080 /* backlight enabled */ | |
126 | ||
127 | #define LCD_ESCAPE_LEN 24 /* 24 chars max for an LCD escape command */ | |
128 | #define LCD_ESCAPE_CHAR 27 /* use char 27 for escape command */ | |
129 | ||
130 | /* macros to simplify use of the parallel port */ | |
131 | #define r_ctr(x) (parport_read_control((x)->port)) | |
132 | #define r_dtr(x) (parport_read_data((x)->port)) | |
133 | #define r_str(x) (parport_read_status((x)->port)) | |
698b1515 WT |
134 | #define w_ctr(x, y) do { parport_write_control((x)->port, (y)); } while (0) |
135 | #define w_dtr(x, y) do { parport_write_data((x)->port, (y)); } while (0) | |
7005b584 WT |
136 | |
137 | /* this defines which bits are to be used and which ones to be ignored */ | |
698b1515 WT |
138 | static __u8 scan_mask_o; /* logical or of the output bits involved in the scan matrix */ |
139 | static __u8 scan_mask_i; /* logical or of the input bits involved in the scan matrix */ | |
7005b584 | 140 | |
698b1515 | 141 | typedef __u64 pmask_t; |
7005b584 WT |
142 | |
143 | enum input_type { | |
698b1515 WT |
144 | INPUT_TYPE_STD, |
145 | INPUT_TYPE_KBD, | |
7005b584 WT |
146 | }; |
147 | ||
148 | enum input_state { | |
698b1515 WT |
149 | INPUT_ST_LOW, |
150 | INPUT_ST_RISING, | |
151 | INPUT_ST_HIGH, | |
152 | INPUT_ST_FALLING, | |
7005b584 WT |
153 | }; |
154 | ||
155 | struct logical_input { | |
698b1515 WT |
156 | struct list_head list; |
157 | pmask_t mask; | |
158 | pmask_t value; | |
159 | enum input_type type; | |
160 | enum input_state state; | |
161 | __u8 rise_time, fall_time; | |
162 | __u8 rise_timer, fall_timer, high_timer; | |
163 | ||
164 | union { | |
165 | struct { /* this structure is valid when type == INPUT_TYPE_STD */ | |
166 | void (*press_fct) (int); | |
167 | void (*release_fct) (int); | |
168 | int press_data; | |
169 | int release_data; | |
170 | } std; | |
171 | struct { /* this structure is valid when type == INPUT_TYPE_KBD */ | |
172 | /* strings can be full-length (ie. non null-terminated) */ | |
173 | char press_str[sizeof(void *) + sizeof(int)]; | |
174 | char repeat_str[sizeof(void *) + sizeof(int)]; | |
175 | char release_str[sizeof(void *) + sizeof(int)]; | |
176 | } kbd; | |
177 | } u; | |
7005b584 WT |
178 | }; |
179 | ||
698b1515 | 180 | LIST_HEAD(logical_inputs); /* list of all defined logical inputs */ |
7005b584 WT |
181 | |
182 | /* physical contacts history | |
183 | * Physical contacts are a 45 bits string of 9 groups of 5 bits each. | |
184 | * The 8 lower groups correspond to output bits 0 to 7, and the 9th group | |
185 | * corresponds to the ground. | |
186 | * Within each group, bits are stored in the same order as read on the port : | |
187 | * BAPSE (busy=4, ack=3, paper empty=2, select=1, error=0). | |
188 | * So, each __u64 (or pmask_t) is represented like this : | |
189 | * 0000000000000000000BAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSE | |
190 | * <-----unused------><gnd><d07><d06><d05><d04><d03><d02><d01><d00> | |
191 | */ | |
192 | static pmask_t phys_read; /* what has just been read from the I/O ports */ | |
698b1515 WT |
193 | static pmask_t phys_read_prev; /* previous phys_read */ |
194 | static pmask_t phys_curr; /* stabilized phys_read (phys_read|phys_read_prev) */ | |
195 | static pmask_t phys_prev; /* previous phys_curr */ | |
196 | static char inputs_stable; /* 0 means that at least one logical signal needs be computed */ | |
7005b584 | 197 | |
7005b584 WT |
198 | /* these variables are specific to the keypad */ |
199 | static char keypad_buffer[KEYPAD_BUFFER]; | |
698b1515 WT |
200 | static int keypad_buflen; |
201 | static int keypad_start; | |
202 | static char keypressed; | |
7005b584 | 203 | static wait_queue_head_t keypad_read_wait; |
7005b584 WT |
204 | |
205 | /* lcd-specific variables */ | |
698b1515 WT |
206 | static unsigned long int lcd_flags; /* contains the LCD config state */ |
207 | static unsigned long int lcd_addr_x; /* contains the LCD X offset */ | |
208 | static unsigned long int lcd_addr_y; /* contains the LCD Y offset */ | |
209 | static char lcd_escape[LCD_ESCAPE_LEN + 1]; /* current escape sequence, 0 terminated */ | |
210 | static int lcd_escape_len = -1; /* not in escape state. >=0 = escape cmd len */ | |
7005b584 | 211 | |
7005b584 WT |
212 | /* |
213 | * Bit masks to convert LCD signals to parallel port outputs. | |
214 | * _d_ are values for data port, _c_ are for control port. | |
215 | * [0] = signal OFF, [1] = signal ON, [2] = mask | |
216 | */ | |
698b1515 WT |
217 | #define BIT_CLR 0 |
218 | #define BIT_SET 1 | |
219 | #define BIT_MSK 2 | |
7005b584 WT |
220 | #define BIT_STATES 3 |
221 | /* | |
222 | * one entry for each bit on the LCD | |
223 | */ | |
224 | #define LCD_BIT_E 0 | |
225 | #define LCD_BIT_RS 1 | |
226 | #define LCD_BIT_RW 2 | |
227 | #define LCD_BIT_BL 3 | |
228 | #define LCD_BIT_CL 4 | |
229 | #define LCD_BIT_DA 5 | |
230 | #define LCD_BITS 6 | |
231 | ||
232 | /* | |
233 | * each bit can be either connected to a DATA or CTRL port | |
234 | */ | |
235 | #define LCD_PORT_C 0 | |
236 | #define LCD_PORT_D 1 | |
237 | #define LCD_PORTS 2 | |
238 | ||
239 | static unsigned char lcd_bits[LCD_PORTS][LCD_BITS][BIT_STATES]; | |
240 | ||
241 | /* | |
242 | * LCD protocols | |
243 | */ | |
244 | #define LCD_PROTO_PARALLEL 0 | |
245 | #define LCD_PROTO_SERIAL 1 | |
246 | ||
247 | /* | |
248 | * LCD character sets | |
249 | */ | |
250 | #define LCD_CHARSET_NORMAL 0 | |
251 | #define LCD_CHARSET_KS0074 1 | |
252 | ||
253 | /* | |
254 | * LCD types | |
255 | */ | |
256 | #define LCD_TYPE_NONE 0 | |
257 | #define LCD_TYPE_OLD 1 | |
258 | #define LCD_TYPE_KS0074 2 | |
259 | #define LCD_TYPE_HANTRONIX 3 | |
260 | #define LCD_TYPE_NEXCOM 4 | |
261 | #define LCD_TYPE_CUSTOM 5 | |
262 | ||
263 | /* | |
264 | * keypad types | |
265 | */ | |
266 | #define KEYPAD_TYPE_NONE 0 | |
267 | #define KEYPAD_TYPE_OLD 1 | |
268 | #define KEYPAD_TYPE_NEW 2 | |
269 | #define KEYPAD_TYPE_NEXCOM 3 | |
270 | ||
271 | /* | |
272 | * panel profiles | |
273 | */ | |
274 | #define PANEL_PROFILE_CUSTOM 0 | |
275 | #define PANEL_PROFILE_OLD 1 | |
276 | #define PANEL_PROFILE_NEW 2 | |
277 | #define PANEL_PROFILE_HANTRONIX 3 | |
278 | #define PANEL_PROFILE_NEXCOM 4 | |
279 | #define PANEL_PROFILE_LARGE 5 | |
280 | ||
281 | /* | |
282 | * Construct custom config from the kernel's configuration | |
283 | */ | |
284 | #define DEFAULT_PROFILE PANEL_PROFILE_LARGE | |
285 | #define DEFAULT_PARPORT 0 | |
286 | #define DEFAULT_LCD LCD_TYPE_OLD | |
287 | #define DEFAULT_KEYPAD KEYPAD_TYPE_OLD | |
7005b584 WT |
288 | #define DEFAULT_LCD_WIDTH 40 |
289 | #define DEFAULT_LCD_BWIDTH 40 | |
290 | #define DEFAULT_LCD_HWIDTH 64 | |
291 | #define DEFAULT_LCD_HEIGHT 2 | |
292 | #define DEFAULT_LCD_PROTO LCD_PROTO_PARALLEL | |
293 | ||
294 | #define DEFAULT_LCD_PIN_E PIN_AUTOLF | |
295 | #define DEFAULT_LCD_PIN_RS PIN_SELECP | |
296 | #define DEFAULT_LCD_PIN_RW PIN_INITP | |
297 | #define DEFAULT_LCD_PIN_SCL PIN_STROBE | |
298 | #define DEFAULT_LCD_PIN_SDA PIN_D0 | |
299 | #define DEFAULT_LCD_PIN_BL PIN_NOT_SET | |
300 | #define DEFAULT_LCD_CHARSET LCD_CHARSET_NORMAL | |
301 | ||
302 | #ifdef CONFIG_PANEL_PROFILE | |
303 | #undef DEFAULT_PROFILE | |
304 | #define DEFAULT_PROFILE CONFIG_PANEL_PROFILE | |
305 | #endif | |
306 | ||
307 | #ifdef CONFIG_PANEL_PARPORT | |
308 | #undef DEFAULT_PARPORT | |
309 | #define DEFAULT_PARPORT CONFIG_PANEL_PARPORT | |
310 | #endif | |
311 | ||
698b1515 | 312 | #if DEFAULT_PROFILE == 0 /* custom */ |
7005b584 WT |
313 | #ifdef CONFIG_PANEL_KEYPAD |
314 | #undef DEFAULT_KEYPAD | |
315 | #define DEFAULT_KEYPAD CONFIG_PANEL_KEYPAD | |
316 | #endif | |
317 | ||
7005b584 WT |
318 | #ifdef CONFIG_PANEL_LCD |
319 | #undef DEFAULT_LCD | |
320 | #define DEFAULT_LCD CONFIG_PANEL_LCD | |
321 | #endif | |
322 | ||
323 | #ifdef CONFIG_PANEL_LCD_WIDTH | |
324 | #undef DEFAULT_LCD_WIDTH | |
325 | #define DEFAULT_LCD_WIDTH CONFIG_PANEL_LCD_WIDTH | |
326 | #endif | |
327 | ||
328 | #ifdef CONFIG_PANEL_LCD_BWIDTH | |
329 | #undef DEFAULT_LCD_BWIDTH | |
330 | #define DEFAULT_LCD_BWIDTH CONFIG_PANEL_LCD_BWIDTH | |
331 | #endif | |
332 | ||
333 | #ifdef CONFIG_PANEL_LCD_HWIDTH | |
334 | #undef DEFAULT_LCD_HWIDTH | |
335 | #define DEFAULT_LCD_HWIDTH CONFIG_PANEL_LCD_HWIDTH | |
336 | #endif | |
337 | ||
338 | #ifdef CONFIG_PANEL_LCD_HEIGHT | |
339 | #undef DEFAULT_LCD_HEIGHT | |
340 | #define DEFAULT_LCD_HEIGHT CONFIG_PANEL_LCD_HEIGHT | |
341 | #endif | |
342 | ||
343 | #ifdef CONFIG_PANEL_LCD_PROTO | |
344 | #undef DEFAULT_LCD_PROTO | |
345 | #define DEFAULT_LCD_PROTO CONFIG_PANEL_LCD_PROTO | |
346 | #endif | |
347 | ||
348 | #ifdef CONFIG_PANEL_LCD_PIN_E | |
349 | #undef DEFAULT_LCD_PIN_E | |
350 | #define DEFAULT_LCD_PIN_E CONFIG_PANEL_LCD_PIN_E | |
351 | #endif | |
352 | ||
353 | #ifdef CONFIG_PANEL_LCD_PIN_RS | |
354 | #undef DEFAULT_LCD_PIN_RS | |
355 | #define DEFAULT_LCD_PIN_RS CONFIG_PANEL_LCD_PIN_RS | |
356 | #endif | |
357 | ||
358 | #ifdef CONFIG_PANEL_LCD_PIN_RW | |
359 | #undef DEFAULT_LCD_PIN_RW | |
360 | #define DEFAULT_LCD_PIN_RW CONFIG_PANEL_LCD_PIN_RW | |
361 | #endif | |
362 | ||
363 | #ifdef CONFIG_PANEL_LCD_PIN_SCL | |
364 | #undef DEFAULT_LCD_PIN_SCL | |
365 | #define DEFAULT_LCD_PIN_SCL CONFIG_PANEL_LCD_PIN_SCL | |
366 | #endif | |
367 | ||
368 | #ifdef CONFIG_PANEL_LCD_PIN_SDA | |
369 | #undef DEFAULT_LCD_PIN_SDA | |
370 | #define DEFAULT_LCD_PIN_SDA CONFIG_PANEL_LCD_PIN_SDA | |
371 | #endif | |
372 | ||
373 | #ifdef CONFIG_PANEL_LCD_PIN_BL | |
374 | #undef DEFAULT_LCD_PIN_BL | |
375 | #define DEFAULT_LCD_PIN_BL CONFIG_PANEL_LCD_PIN_BL | |
376 | #endif | |
377 | ||
378 | #ifdef CONFIG_PANEL_LCD_CHARSET | |
379 | #undef DEFAULT_LCD_CHARSET | |
380 | #define DEFAULT_LCD_CHARSET | |
381 | #endif | |
382 | ||
383 | #endif /* DEFAULT_PROFILE == 0 */ | |
384 | ||
385 | /* global variables */ | |
698b1515 WT |
386 | static int keypad_open_cnt; /* #times opened */ |
387 | static int lcd_open_cnt; /* #times opened */ | |
698b1515 | 388 | static struct pardevice *pprt; |
7005b584 | 389 | |
f6d1fcfe WT |
390 | static int lcd_initialized; |
391 | static int keypad_initialized; | |
7005b584 | 392 | |
698b1515 | 393 | static int light_tempo; |
7005b584 | 394 | |
698b1515 WT |
395 | static char lcd_must_clear; |
396 | static char lcd_left_shift; | |
397 | static char init_in_progress; | |
7005b584 | 398 | |
698b1515 WT |
399 | static void (*lcd_write_cmd) (int); |
400 | static void (*lcd_write_data) (int); | |
401 | static void (*lcd_clear_fast) (void); | |
7005b584 | 402 | |
698b1515 | 403 | static DEFINE_SPINLOCK(pprt_lock); |
7005b584 WT |
404 | static struct timer_list scan_timer; |
405 | ||
63023177 | 406 | MODULE_DESCRIPTION("Generic parallel port LCD/Keypad driver"); |
f6d1fcfe WT |
407 | |
408 | static int parport = -1; | |
698b1515 WT |
409 | module_param(parport, int, 0000); |
410 | MODULE_PARM_DESC(parport, "Parallel port index (0=lpt1, 1=lpt2, ...)"); | |
f6d1fcfe WT |
411 | |
412 | static int lcd_height = -1; | |
698b1515 WT |
413 | module_param(lcd_height, int, 0000); |
414 | MODULE_PARM_DESC(lcd_height, "Number of lines on the LCD"); | |
f6d1fcfe WT |
415 | |
416 | static int lcd_width = -1; | |
698b1515 WT |
417 | module_param(lcd_width, int, 0000); |
418 | MODULE_PARM_DESC(lcd_width, "Number of columns on the LCD"); | |
f6d1fcfe WT |
419 | |
420 | static int lcd_bwidth = -1; /* internal buffer width (usually 40) */ | |
698b1515 WT |
421 | module_param(lcd_bwidth, int, 0000); |
422 | MODULE_PARM_DESC(lcd_bwidth, "Internal LCD line width (40)"); | |
f6d1fcfe WT |
423 | |
424 | static int lcd_hwidth = -1; /* hardware buffer width (usually 64) */ | |
698b1515 WT |
425 | module_param(lcd_hwidth, int, 0000); |
426 | MODULE_PARM_DESC(lcd_hwidth, "LCD line hardware address (64)"); | |
f6d1fcfe WT |
427 | |
428 | static int lcd_enabled = -1; | |
698b1515 WT |
429 | module_param(lcd_enabled, int, 0000); |
430 | MODULE_PARM_DESC(lcd_enabled, "Deprecated option, use lcd_type instead"); | |
f6d1fcfe WT |
431 | |
432 | static int keypad_enabled = -1; | |
698b1515 WT |
433 | module_param(keypad_enabled, int, 0000); |
434 | MODULE_PARM_DESC(keypad_enabled, "Deprecated option, use keypad_type instead"); | |
f6d1fcfe WT |
435 | |
436 | static int lcd_type = -1; | |
698b1515 WT |
437 | module_param(lcd_type, int, 0000); |
438 | MODULE_PARM_DESC(lcd_type, | |
439 | "LCD type: 0=none, 1=old //, 2=serial ks0074, 3=hantronix //, 4=nexcom //, 5=compiled-in"); | |
f6d1fcfe WT |
440 | |
441 | static int lcd_proto = -1; | |
698b1515 WT |
442 | module_param(lcd_proto, int, 0000); |
443 | MODULE_PARM_DESC(lcd_proto, "LCD communication: 0=parallel (//), 1=serial"); | |
f6d1fcfe WT |
444 | |
445 | static int lcd_charset = -1; | |
698b1515 WT |
446 | module_param(lcd_charset, int, 0000); |
447 | MODULE_PARM_DESC(lcd_charset, "LCD character set: 0=standard, 1=KS0074"); | |
f6d1fcfe WT |
448 | |
449 | static int keypad_type = -1; | |
698b1515 WT |
450 | module_param(keypad_type, int, 0000); |
451 | MODULE_PARM_DESC(keypad_type, | |
452 | "Keypad type: 0=none, 1=old 6 keys, 2=new 6+1 keys, 3=nexcom 4 keys"); | |
f6d1fcfe | 453 | |
f6d1fcfe | 454 | static int profile = DEFAULT_PROFILE; |
698b1515 WT |
455 | module_param(profile, int, 0000); |
456 | MODULE_PARM_DESC(profile, | |
457 | "1=16x2 old kp; 2=serial 16x2, new kp; 3=16x2 hantronix; 4=16x2 nexcom; default=40x2, old kp"); | |
458 | ||
f6d1fcfe WT |
459 | /* |
460 | * These are the parallel port pins the LCD control signals are connected to. | |
461 | * Set this to 0 if the signal is not used. Set it to its opposite value | |
462 | * (negative) if the signal is negated. -MAXINT is used to indicate that the | |
463 | * pin has not been explicitly specified. | |
464 | * | |
63023177 | 465 | * WARNING! no check will be performed about collisions with keypad ! |
f6d1fcfe WT |
466 | */ |
467 | ||
468 | static int lcd_e_pin = PIN_NOT_SET; | |
698b1515 WT |
469 | module_param(lcd_e_pin, int, 0000); |
470 | MODULE_PARM_DESC(lcd_e_pin, | |
471 | "# of the // port pin connected to LCD 'E' signal, with polarity (-17..17)"); | |
f6d1fcfe WT |
472 | |
473 | static int lcd_rs_pin = PIN_NOT_SET; | |
698b1515 WT |
474 | module_param(lcd_rs_pin, int, 0000); |
475 | MODULE_PARM_DESC(lcd_rs_pin, | |
476 | "# of the // port pin connected to LCD 'RS' signal, with polarity (-17..17)"); | |
f6d1fcfe WT |
477 | |
478 | static int lcd_rw_pin = PIN_NOT_SET; | |
698b1515 WT |
479 | module_param(lcd_rw_pin, int, 0000); |
480 | MODULE_PARM_DESC(lcd_rw_pin, | |
481 | "# of the // port pin connected to LCD 'RW' signal, with polarity (-17..17)"); | |
f6d1fcfe WT |
482 | |
483 | static int lcd_bl_pin = PIN_NOT_SET; | |
698b1515 WT |
484 | module_param(lcd_bl_pin, int, 0000); |
485 | MODULE_PARM_DESC(lcd_bl_pin, | |
486 | "# of the // port pin connected to LCD backlight, with polarity (-17..17)"); | |
f6d1fcfe WT |
487 | |
488 | static int lcd_da_pin = PIN_NOT_SET; | |
698b1515 WT |
489 | module_param(lcd_da_pin, int, 0000); |
490 | MODULE_PARM_DESC(lcd_da_pin, | |
491 | "# of the // port pin connected to serial LCD 'SDA' signal, with polarity (-17..17)"); | |
f6d1fcfe WT |
492 | |
493 | static int lcd_cl_pin = PIN_NOT_SET; | |
698b1515 WT |
494 | module_param(lcd_cl_pin, int, 0000); |
495 | MODULE_PARM_DESC(lcd_cl_pin, | |
496 | "# of the // port pin connected to serial LCD 'SCL' signal, with polarity (-17..17)"); | |
7005b584 | 497 | |
698b1515 | 498 | static unsigned char *lcd_char_conv; |
7005b584 WT |
499 | |
500 | /* for some LCD drivers (ks0074) we need a charset conversion table. */ | |
501 | static unsigned char lcd_char_conv_ks0074[256] = { | |
698b1515 WT |
502 | /* 0|8 1|9 2|A 3|B 4|C 5|D 6|E 7|F */ |
503 | /* 0x00 */ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, | |
504 | /* 0x08 */ 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, | |
505 | /* 0x10 */ 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, | |
506 | /* 0x18 */ 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, | |
507 | /* 0x20 */ 0x20, 0x21, 0x22, 0x23, 0xa2, 0x25, 0x26, 0x27, | |
508 | /* 0x28 */ 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, | |
509 | /* 0x30 */ 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, | |
510 | /* 0x38 */ 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, | |
511 | /* 0x40 */ 0xa0, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, | |
512 | /* 0x48 */ 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, | |
513 | /* 0x50 */ 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, | |
514 | /* 0x58 */ 0x58, 0x59, 0x5a, 0xfa, 0xfb, 0xfc, 0x1d, 0xc4, | |
515 | /* 0x60 */ 0x96, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, | |
516 | /* 0x68 */ 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, | |
517 | /* 0x70 */ 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, | |
518 | /* 0x78 */ 0x78, 0x79, 0x7a, 0xfd, 0xfe, 0xff, 0xce, 0x20, | |
519 | /* 0x80 */ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, | |
520 | /* 0x88 */ 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, | |
521 | /* 0x90 */ 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, | |
522 | /* 0x98 */ 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, | |
523 | /* 0xA0 */ 0x20, 0x40, 0xb1, 0xa1, 0x24, 0xa3, 0xfe, 0x5f, | |
524 | /* 0xA8 */ 0x22, 0xc8, 0x61, 0x14, 0x97, 0x2d, 0xad, 0x96, | |
525 | /* 0xB0 */ 0x80, 0x8c, 0x82, 0x83, 0x27, 0x8f, 0x86, 0xdd, | |
526 | /* 0xB8 */ 0x2c, 0x81, 0x6f, 0x15, 0x8b, 0x8a, 0x84, 0x60, | |
527 | /* 0xC0 */ 0xe2, 0xe2, 0xe2, 0x5b, 0x5b, 0xae, 0xbc, 0xa9, | |
528 | /* 0xC8 */ 0xc5, 0xbf, 0xc6, 0xf1, 0xe3, 0xe3, 0xe3, 0xe3, | |
529 | /* 0xD0 */ 0x44, 0x5d, 0xa8, 0xe4, 0xec, 0xec, 0x5c, 0x78, | |
530 | /* 0xD8 */ 0xab, 0xa6, 0xe5, 0x5e, 0x5e, 0xe6, 0xaa, 0xbe, | |
531 | /* 0xE0 */ 0x7f, 0xe7, 0xaf, 0x7b, 0x7b, 0xaf, 0xbd, 0xc8, | |
532 | /* 0xE8 */ 0xa4, 0xa5, 0xc7, 0xf6, 0xa7, 0xe8, 0x69, 0x69, | |
533 | /* 0xF0 */ 0xed, 0x7d, 0xa8, 0xe4, 0xec, 0x5c, 0x5c, 0x25, | |
534 | /* 0xF8 */ 0xac, 0xa6, 0xea, 0xef, 0x7e, 0xeb, 0xb2, 0x79, | |
7005b584 WT |
535 | }; |
536 | ||
537 | char old_keypad_profile[][4][9] = { | |
698b1515 WT |
538 | {"S0", "Left\n", "Left\n", ""}, |
539 | {"S1", "Down\n", "Down\n", ""}, | |
540 | {"S2", "Up\n", "Up\n", ""}, | |
541 | {"S3", "Right\n", "Right\n", ""}, | |
542 | {"S4", "Esc\n", "Esc\n", ""}, | |
543 | {"S5", "Ret\n", "Ret\n", ""}, | |
544 | {"", "", "", ""} | |
7005b584 WT |
545 | }; |
546 | ||
547 | /* signals, press, repeat, release */ | |
548 | char new_keypad_profile[][4][9] = { | |
698b1515 WT |
549 | {"S0", "Left\n", "Left\n", ""}, |
550 | {"S1", "Down\n", "Down\n", ""}, | |
551 | {"S2", "Up\n", "Up\n", ""}, | |
552 | {"S3", "Right\n", "Right\n", ""}, | |
553 | {"S4s5", "", "Esc\n", "Esc\n"}, | |
554 | {"s4S5", "", "Ret\n", "Ret\n"}, | |
555 | {"S4S5", "Help\n", "", ""}, | |
556 | /* add new signals above this line */ | |
557 | {"", "", "", ""} | |
7005b584 WT |
558 | }; |
559 | ||
560 | /* signals, press, repeat, release */ | |
561 | char nexcom_keypad_profile[][4][9] = { | |
698b1515 WT |
562 | {"a-p-e-", "Down\n", "Down\n", ""}, |
563 | {"a-p-E-", "Ret\n", "Ret\n", ""}, | |
564 | {"a-P-E-", "Esc\n", "Esc\n", ""}, | |
565 | {"a-P-e-", "Up\n", "Up\n", ""}, | |
566 | /* add new signals above this line */ | |
567 | {"", "", "", ""} | |
7005b584 WT |
568 | }; |
569 | ||
570 | static char (*keypad_profile)[4][9] = old_keypad_profile; | |
571 | ||
572 | /* FIXME: this should be converted to a bit array containing signals states */ | |
573 | static struct { | |
698b1515 WT |
574 | unsigned char e; /* parallel LCD E (data latch on falling edge) */ |
575 | unsigned char rs; /* parallel LCD RS (0 = cmd, 1 = data) */ | |
576 | unsigned char rw; /* parallel LCD R/W (0 = W, 1 = R) */ | |
577 | unsigned char bl; /* parallel LCD backlight (0 = off, 1 = on) */ | |
578 | unsigned char cl; /* serial LCD clock (latch on rising edge) */ | |
579 | unsigned char da; /* serial LCD data */ | |
7005b584 WT |
580 | } bits; |
581 | ||
582 | static void init_scan_timer(void); | |
583 | ||
584 | /* sets data port bits according to current signals values */ | |
698b1515 WT |
585 | static int set_data_bits(void) |
586 | { | |
587 | int val, bit; | |
588 | ||
589 | val = r_dtr(pprt); | |
590 | for (bit = 0; bit < LCD_BITS; bit++) | |
591 | val &= lcd_bits[LCD_PORT_D][bit][BIT_MSK]; | |
592 | ||
593 | val |= lcd_bits[LCD_PORT_D][LCD_BIT_E][bits.e] | |
594 | | lcd_bits[LCD_PORT_D][LCD_BIT_RS][bits.rs] | |
595 | | lcd_bits[LCD_PORT_D][LCD_BIT_RW][bits.rw] | |
596 | | lcd_bits[LCD_PORT_D][LCD_BIT_BL][bits.bl] | |
597 | | lcd_bits[LCD_PORT_D][LCD_BIT_CL][bits.cl] | |
598 | | lcd_bits[LCD_PORT_D][LCD_BIT_DA][bits.da]; | |
599 | ||
600 | w_dtr(pprt, val); | |
601 | return val; | |
7005b584 WT |
602 | } |
603 | ||
604 | /* sets ctrl port bits according to current signals values */ | |
698b1515 WT |
605 | static int set_ctrl_bits(void) |
606 | { | |
607 | int val, bit; | |
608 | ||
609 | val = r_ctr(pprt); | |
610 | for (bit = 0; bit < LCD_BITS; bit++) | |
611 | val &= lcd_bits[LCD_PORT_C][bit][BIT_MSK]; | |
612 | ||
613 | val |= lcd_bits[LCD_PORT_C][LCD_BIT_E][bits.e] | |
614 | | lcd_bits[LCD_PORT_C][LCD_BIT_RS][bits.rs] | |
615 | | lcd_bits[LCD_PORT_C][LCD_BIT_RW][bits.rw] | |
616 | | lcd_bits[LCD_PORT_C][LCD_BIT_BL][bits.bl] | |
617 | | lcd_bits[LCD_PORT_C][LCD_BIT_CL][bits.cl] | |
618 | | lcd_bits[LCD_PORT_C][LCD_BIT_DA][bits.da]; | |
619 | ||
620 | w_ctr(pprt, val); | |
621 | return val; | |
7005b584 WT |
622 | } |
623 | ||
624 | /* sets ctrl & data port bits according to current signals values */ | |
6136ac86 | 625 | static void panel_set_bits(void) |
698b1515 WT |
626 | { |
627 | set_data_bits(); | |
628 | set_ctrl_bits(); | |
7005b584 WT |
629 | } |
630 | ||
631 | /* | |
632 | * Converts a parallel port pin (from -25 to 25) to data and control ports | |
633 | * masks, and data and control port bits. The signal will be considered | |
634 | * unconnected if it's on pin 0 or an invalid pin (<-25 or >25). | |
635 | * | |
636 | * Result will be used this way : | |
637 | * out(dport, in(dport) & d_val[2] | d_val[signal_state]) | |
638 | * out(cport, in(cport) & c_val[2] | c_val[signal_state]) | |
639 | */ | |
698b1515 WT |
640 | void pin_to_bits(int pin, unsigned char *d_val, unsigned char *c_val) |
641 | { | |
642 | int d_bit, c_bit, inv; | |
643 | ||
644 | d_val[0] = c_val[0] = d_val[1] = c_val[1] = 0; | |
645 | d_val[2] = c_val[2] = 0xFF; | |
646 | ||
647 | if (pin == 0) | |
648 | return; | |
649 | ||
650 | inv = (pin < 0); | |
651 | if (inv) | |
652 | pin = -pin; | |
653 | ||
654 | d_bit = c_bit = 0; | |
655 | ||
656 | switch (pin) { | |
657 | case PIN_STROBE: /* strobe, inverted */ | |
658 | c_bit = PNL_PSTROBE; | |
659 | inv = !inv; | |
660 | break; | |
661 | case PIN_D0...PIN_D7: /* D0 - D7 = 2 - 9 */ | |
662 | d_bit = 1 << (pin - 2); | |
663 | break; | |
664 | case PIN_AUTOLF: /* autofeed, inverted */ | |
665 | c_bit = PNL_PAUTOLF; | |
666 | inv = !inv; | |
667 | break; | |
668 | case PIN_INITP: /* init, direct */ | |
669 | c_bit = PNL_PINITP; | |
670 | break; | |
671 | case PIN_SELECP: /* select_in, inverted */ | |
672 | c_bit = PNL_PSELECP; | |
673 | inv = !inv; | |
674 | break; | |
675 | default: /* unknown pin, ignore */ | |
676 | break; | |
677 | } | |
678 | ||
679 | if (c_bit) { | |
680 | c_val[2] &= ~c_bit; | |
681 | c_val[!inv] = c_bit; | |
682 | } else if (d_bit) { | |
683 | d_val[2] &= ~d_bit; | |
684 | d_val[!inv] = d_bit; | |
685 | } | |
7005b584 WT |
686 | } |
687 | ||
688 | /* sleeps that many milliseconds with a reschedule */ | |
698b1515 WT |
689 | static void long_sleep(int ms) |
690 | { | |
7005b584 | 691 | |
698b1515 WT |
692 | if (in_interrupt()) |
693 | mdelay(ms); | |
694 | else { | |
695 | current->state = TASK_INTERRUPTIBLE; | |
696 | schedule_timeout((ms * HZ + 999) / 1000); | |
697 | } | |
698 | } | |
7005b584 WT |
699 | |
700 | /* send a serial byte to the LCD panel. The caller is responsible for locking if needed. */ | |
698b1515 WT |
701 | static void lcd_send_serial(int byte) |
702 | { | |
703 | int bit; | |
704 | ||
705 | /* the data bit is set on D0, and the clock on STROBE. | |
706 | * LCD reads D0 on STROBE's rising edge. | |
707 | */ | |
708 | for (bit = 0; bit < 8; bit++) { | |
709 | bits.cl = BIT_CLR; /* CLK low */ | |
6136ac86 | 710 | panel_set_bits(); |
698b1515 | 711 | bits.da = byte & 1; |
6136ac86 | 712 | panel_set_bits(); |
698b1515 WT |
713 | udelay(2); /* maintain the data during 2 us before CLK up */ |
714 | bits.cl = BIT_SET; /* CLK high */ | |
6136ac86 | 715 | panel_set_bits(); |
698b1515 WT |
716 | udelay(1); /* maintain the strobe during 1 us */ |
717 | byte >>= 1; | |
718 | } | |
7005b584 WT |
719 | } |
720 | ||
721 | /* turn the backlight on or off */ | |
698b1515 WT |
722 | static void lcd_backlight(int on) |
723 | { | |
724 | if (lcd_bl_pin == PIN_NONE) | |
725 | return; | |
726 | ||
727 | /* The backlight is activated by seting the AUTOFEED line to +5V */ | |
728 | spin_lock(&pprt_lock); | |
729 | bits.bl = on; | |
6136ac86 | 730 | panel_set_bits(); |
698b1515 | 731 | spin_unlock(&pprt_lock); |
7005b584 WT |
732 | } |
733 | ||
734 | /* send a command to the LCD panel in serial mode */ | |
698b1515 WT |
735 | static void lcd_write_cmd_s(int cmd) |
736 | { | |
737 | spin_lock(&pprt_lock); | |
738 | lcd_send_serial(0x1F); /* R/W=W, RS=0 */ | |
739 | lcd_send_serial(cmd & 0x0F); | |
740 | lcd_send_serial((cmd >> 4) & 0x0F); | |
741 | udelay(40); /* the shortest command takes at least 40 us */ | |
742 | spin_unlock(&pprt_lock); | |
7005b584 WT |
743 | } |
744 | ||
745 | /* send data to the LCD panel in serial mode */ | |
698b1515 WT |
746 | static void lcd_write_data_s(int data) |
747 | { | |
748 | spin_lock(&pprt_lock); | |
749 | lcd_send_serial(0x5F); /* R/W=W, RS=1 */ | |
750 | lcd_send_serial(data & 0x0F); | |
751 | lcd_send_serial((data >> 4) & 0x0F); | |
752 | udelay(40); /* the shortest data takes at least 40 us */ | |
753 | spin_unlock(&pprt_lock); | |
7005b584 WT |
754 | } |
755 | ||
756 | /* send a command to the LCD panel in 8 bits parallel mode */ | |
698b1515 WT |
757 | static void lcd_write_cmd_p8(int cmd) |
758 | { | |
759 | spin_lock(&pprt_lock); | |
760 | /* present the data to the data port */ | |
761 | w_dtr(pprt, cmd); | |
762 | udelay(20); /* maintain the data during 20 us before the strobe */ | |
7005b584 | 763 | |
698b1515 WT |
764 | bits.e = BIT_SET; |
765 | bits.rs = BIT_CLR; | |
766 | bits.rw = BIT_CLR; | |
767 | set_ctrl_bits(); | |
7005b584 | 768 | |
698b1515 | 769 | udelay(40); /* maintain the strobe during 40 us */ |
7005b584 | 770 | |
698b1515 WT |
771 | bits.e = BIT_CLR; |
772 | set_ctrl_bits(); | |
7005b584 | 773 | |
698b1515 WT |
774 | udelay(120); /* the shortest command takes at least 120 us */ |
775 | spin_unlock(&pprt_lock); | |
7005b584 WT |
776 | } |
777 | ||
778 | /* send data to the LCD panel in 8 bits parallel mode */ | |
698b1515 WT |
779 | static void lcd_write_data_p8(int data) |
780 | { | |
781 | spin_lock(&pprt_lock); | |
782 | /* present the data to the data port */ | |
783 | w_dtr(pprt, data); | |
784 | udelay(20); /* maintain the data during 20 us before the strobe */ | |
7005b584 | 785 | |
698b1515 WT |
786 | bits.e = BIT_SET; |
787 | bits.rs = BIT_SET; | |
788 | bits.rw = BIT_CLR; | |
789 | set_ctrl_bits(); | |
7005b584 | 790 | |
698b1515 | 791 | udelay(40); /* maintain the strobe during 40 us */ |
7005b584 | 792 | |
698b1515 WT |
793 | bits.e = BIT_CLR; |
794 | set_ctrl_bits(); | |
7005b584 | 795 | |
698b1515 WT |
796 | udelay(45); /* the shortest data takes at least 45 us */ |
797 | spin_unlock(&pprt_lock); | |
7005b584 WT |
798 | } |
799 | ||
698b1515 WT |
800 | static void lcd_gotoxy(void) |
801 | { | |
802 | lcd_write_cmd(0x80 /* set DDRAM address */ | |
803 | | (lcd_addr_y ? lcd_hwidth : 0) | |
804 | /* we force the cursor to stay at the end of the line if it wants to go farther */ | |
805 | | ((lcd_addr_x < lcd_bwidth) ? lcd_addr_x & | |
806 | (lcd_hwidth - 1) : lcd_bwidth - 1)); | |
7005b584 WT |
807 | } |
808 | ||
698b1515 WT |
809 | static void lcd_print(char c) |
810 | { | |
811 | if (lcd_addr_x < lcd_bwidth) { | |
812 | if (lcd_char_conv != NULL) | |
813 | c = lcd_char_conv[(unsigned char)c]; | |
814 | lcd_write_data(c); | |
815 | lcd_addr_x++; | |
816 | } | |
817 | /* prevents the cursor from wrapping onto the next line */ | |
818 | if (lcd_addr_x == lcd_bwidth) | |
819 | lcd_gotoxy(); | |
7005b584 WT |
820 | } |
821 | ||
822 | /* fills the display with spaces and resets X/Y */ | |
698b1515 WT |
823 | static void lcd_clear_fast_s(void) |
824 | { | |
825 | int pos; | |
826 | lcd_addr_x = lcd_addr_y = 0; | |
827 | lcd_gotoxy(); | |
828 | ||
829 | spin_lock(&pprt_lock); | |
830 | for (pos = 0; pos < lcd_height * lcd_hwidth; pos++) { | |
831 | lcd_send_serial(0x5F); /* R/W=W, RS=1 */ | |
832 | lcd_send_serial(' ' & 0x0F); | |
833 | lcd_send_serial((' ' >> 4) & 0x0F); | |
834 | udelay(40); /* the shortest data takes at least 40 us */ | |
835 | } | |
836 | spin_unlock(&pprt_lock); | |
837 | ||
838 | lcd_addr_x = lcd_addr_y = 0; | |
839 | lcd_gotoxy(); | |
7005b584 WT |
840 | } |
841 | ||
842 | /* fills the display with spaces and resets X/Y */ | |
698b1515 WT |
843 | static void lcd_clear_fast_p8(void) |
844 | { | |
845 | int pos; | |
846 | lcd_addr_x = lcd_addr_y = 0; | |
847 | lcd_gotoxy(); | |
7005b584 | 848 | |
698b1515 WT |
849 | spin_lock(&pprt_lock); |
850 | for (pos = 0; pos < lcd_height * lcd_hwidth; pos++) { | |
851 | /* present the data to the data port */ | |
852 | w_dtr(pprt, ' '); | |
853 | udelay(20); /* maintain the data during 20 us before the strobe */ | |
7005b584 | 854 | |
698b1515 WT |
855 | bits.e = BIT_SET; |
856 | bits.rs = BIT_SET; | |
857 | bits.rw = BIT_CLR; | |
858 | set_ctrl_bits(); | |
7005b584 | 859 | |
698b1515 | 860 | udelay(40); /* maintain the strobe during 40 us */ |
7005b584 | 861 | |
698b1515 WT |
862 | bits.e = BIT_CLR; |
863 | set_ctrl_bits(); | |
7005b584 | 864 | |
698b1515 WT |
865 | udelay(45); /* the shortest data takes at least 45 us */ |
866 | } | |
867 | spin_unlock(&pprt_lock); | |
7005b584 | 868 | |
698b1515 WT |
869 | lcd_addr_x = lcd_addr_y = 0; |
870 | lcd_gotoxy(); | |
7005b584 WT |
871 | } |
872 | ||
873 | /* clears the display and resets X/Y */ | |
698b1515 WT |
874 | static void lcd_clear_display(void) |
875 | { | |
876 | lcd_write_cmd(0x01); /* clear display */ | |
877 | lcd_addr_x = lcd_addr_y = 0; | |
878 | /* we must wait a few milliseconds (15) */ | |
879 | long_sleep(15); | |
7005b584 WT |
880 | } |
881 | ||
698b1515 WT |
882 | static void lcd_init_display(void) |
883 | { | |
7005b584 | 884 | |
698b1515 WT |
885 | lcd_flags = ((lcd_height > 1) ? LCD_FLAG_N : 0) |
886 | | LCD_FLAG_D | LCD_FLAG_C | LCD_FLAG_B; | |
7005b584 | 887 | |
698b1515 | 888 | long_sleep(20); /* wait 20 ms after power-up for the paranoid */ |
7005b584 | 889 | |
698b1515 WT |
890 | lcd_write_cmd(0x30); /* 8bits, 1 line, small fonts */ |
891 | long_sleep(10); | |
892 | lcd_write_cmd(0x30); /* 8bits, 1 line, small fonts */ | |
893 | long_sleep(10); | |
894 | lcd_write_cmd(0x30); /* 8bits, 1 line, small fonts */ | |
895 | long_sleep(10); | |
7005b584 | 896 | |
698b1515 WT |
897 | lcd_write_cmd(0x30 /* set font height and lines number */ |
898 | | ((lcd_flags & LCD_FLAG_F) ? 4 : 0) | |
899 | | ((lcd_flags & LCD_FLAG_N) ? 8 : 0) | |
900 | ); | |
901 | long_sleep(10); | |
7005b584 | 902 | |
698b1515 WT |
903 | lcd_write_cmd(0x08); /* display off, cursor off, blink off */ |
904 | long_sleep(10); | |
7005b584 | 905 | |
698b1515 WT |
906 | lcd_write_cmd(0x08 /* set display mode */ |
907 | | ((lcd_flags & LCD_FLAG_D) ? 4 : 0) | |
908 | | ((lcd_flags & LCD_FLAG_C) ? 2 : 0) | |
909 | | ((lcd_flags & LCD_FLAG_B) ? 1 : 0) | |
910 | ); | |
7005b584 | 911 | |
698b1515 | 912 | lcd_backlight((lcd_flags & LCD_FLAG_L) ? 1 : 0); |
7005b584 | 913 | |
698b1515 | 914 | long_sleep(10); |
7005b584 | 915 | |
698b1515 | 916 | lcd_write_cmd(0x06); /* entry mode set : increment, cursor shifting */ |
7005b584 | 917 | |
698b1515 | 918 | lcd_clear_display(); |
7005b584 WT |
919 | } |
920 | ||
921 | /* | |
922 | * These are the file operation function for user access to /dev/lcd | |
923 | * This function can also be called from inside the kernel, by | |
924 | * setting file and ppos to NULL. | |
925 | * | |
926 | */ | |
927 | ||
698b1515 WT |
928 | static ssize_t lcd_write(struct file *file, |
929 | const char *buf, size_t count, loff_t *ppos) | |
930 | { | |
7005b584 | 931 | |
698b1515 WT |
932 | const char *tmp = buf; |
933 | char c; | |
934 | ||
935 | for (; count-- > 0; (ppos ? (*ppos)++ : 0), ++tmp) { | |
936 | if (!in_interrupt() && (((count + 1) & 0x1f) == 0)) | |
937 | schedule(); /* let's be a little nice with other processes that need some CPU */ | |
938 | ||
939 | if (ppos == NULL && file == NULL) | |
940 | c = *tmp; /* let's not use get_user() from the kernel ! */ | |
941 | else if (get_user(c, tmp)) | |
942 | return -EFAULT; | |
943 | ||
944 | /* first, we'll test if we're in escape mode */ | |
945 | if ((c != '\n') && lcd_escape_len >= 0) { /* yes, let's add this char to the buffer */ | |
946 | lcd_escape[lcd_escape_len++] = c; | |
947 | lcd_escape[lcd_escape_len] = 0; | |
948 | } else { | |
949 | lcd_escape_len = -1; /* aborts any previous escape sequence */ | |
950 | ||
951 | switch (c) { | |
952 | case LCD_ESCAPE_CHAR: /* start of an escape sequence */ | |
953 | lcd_escape_len = 0; | |
954 | lcd_escape[lcd_escape_len] = 0; | |
955 | break; | |
956 | case '\b': /* go back one char and clear it */ | |
957 | if (lcd_addr_x > 0) { | |
958 | if (lcd_addr_x < lcd_bwidth) /* check if we're not at the end of the line */ | |
959 | lcd_write_cmd(0x10); /* back one char */ | |
960 | lcd_addr_x--; | |
961 | } | |
962 | lcd_write_data(' '); /* replace with a space */ | |
963 | lcd_write_cmd(0x10); /* back one char again */ | |
964 | break; | |
965 | case '\014': /* quickly clear the display */ | |
966 | lcd_clear_fast(); | |
967 | break; | |
968 | case '\n': /* flush the remainder of the current line and go to the | |
969 | beginning of the next line */ | |
970 | for (; lcd_addr_x < lcd_bwidth; lcd_addr_x++) | |
971 | lcd_write_data(' '); | |
972 | lcd_addr_x = 0; | |
973 | lcd_addr_y = (lcd_addr_y + 1) % lcd_height; | |
974 | lcd_gotoxy(); | |
975 | break; | |
976 | case '\r': /* go to the beginning of the same line */ | |
977 | lcd_addr_x = 0; | |
978 | lcd_gotoxy(); | |
979 | break; | |
980 | case '\t': /* print a space instead of the tab */ | |
981 | lcd_print(' '); | |
982 | break; | |
983 | default: /* simply print this char */ | |
984 | lcd_print(c); | |
985 | break; | |
7005b584 | 986 | } |
7005b584 | 987 | } |
7005b584 | 988 | |
698b1515 WT |
989 | /* now we'll see if we're in an escape mode and if the current |
990 | escape sequence can be understood. | |
991 | */ | |
992 | if (lcd_escape_len >= 2) { /* minimal length for an escape command */ | |
993 | int processed = 0; /* 1 means the command has been processed */ | |
994 | ||
995 | if (!strcmp(lcd_escape, "[2J")) { /* Clear the display */ | |
996 | lcd_clear_fast(); /* clear display */ | |
997 | processed = 1; | |
998 | } else if (!strcmp(lcd_escape, "[H")) { /* Cursor to home */ | |
999 | lcd_addr_x = lcd_addr_y = 0; | |
1000 | lcd_gotoxy(); | |
1001 | processed = 1; | |
7005b584 | 1002 | } |
698b1515 WT |
1003 | /* codes starting with ^[[L */ |
1004 | else if ((lcd_escape_len >= 3) && | |
1005 | (lcd_escape[0] == '[') && (lcd_escape[1] == 'L')) { /* LCD special codes */ | |
1006 | ||
1007 | char *esc = lcd_escape + 2; | |
1008 | int oldflags = lcd_flags; | |
1009 | ||
1010 | /* check for display mode flags */ | |
1011 | switch (*esc) { | |
1012 | case 'D': /* Display ON */ | |
1013 | lcd_flags |= LCD_FLAG_D; | |
1014 | processed = 1; | |
1015 | break; | |
1016 | case 'd': /* Display OFF */ | |
1017 | lcd_flags &= ~LCD_FLAG_D; | |
1018 | processed = 1; | |
1019 | break; | |
1020 | case 'C': /* Cursor ON */ | |
1021 | lcd_flags |= LCD_FLAG_C; | |
1022 | processed = 1; | |
1023 | break; | |
1024 | case 'c': /* Cursor OFF */ | |
1025 | lcd_flags &= ~LCD_FLAG_C; | |
1026 | processed = 1; | |
1027 | break; | |
1028 | case 'B': /* Blink ON */ | |
1029 | lcd_flags |= LCD_FLAG_B; | |
1030 | processed = 1; | |
1031 | break; | |
1032 | case 'b': /* Blink OFF */ | |
1033 | lcd_flags &= ~LCD_FLAG_B; | |
1034 | processed = 1; | |
1035 | break; | |
1036 | case '+': /* Back light ON */ | |
1037 | lcd_flags |= LCD_FLAG_L; | |
1038 | processed = 1; | |
1039 | break; | |
1040 | case '-': /* Back light OFF */ | |
1041 | lcd_flags &= ~LCD_FLAG_L; | |
1042 | processed = 1; | |
1043 | break; | |
1044 | case '*': /* flash back light using the keypad timer */ | |
1045 | if (scan_timer.function != NULL) { | |
1046 | if (light_tempo == 0 | |
1047 | && ((lcd_flags & LCD_FLAG_L) | |
1048 | == 0)) | |
1049 | lcd_backlight(1); | |
1050 | light_tempo = FLASH_LIGHT_TEMPO; | |
1051 | } | |
1052 | processed = 1; | |
1053 | break; | |
1054 | case 'f': /* Small Font */ | |
1055 | lcd_flags &= ~LCD_FLAG_F; | |
1056 | processed = 1; | |
1057 | break; | |
1058 | case 'F': /* Large Font */ | |
1059 | lcd_flags |= LCD_FLAG_F; | |
1060 | processed = 1; | |
1061 | break; | |
1062 | case 'n': /* One Line */ | |
1063 | lcd_flags &= ~LCD_FLAG_N; | |
1064 | processed = 1; | |
1065 | break; | |
1066 | case 'N': /* Two Lines */ | |
1067 | lcd_flags |= LCD_FLAG_N; | |
1068 | break; | |
1069 | ||
1070 | case 'l': /* Shift Cursor Left */ | |
1071 | if (lcd_addr_x > 0) { | |
1072 | if (lcd_addr_x < lcd_bwidth) | |
1073 | lcd_write_cmd(0x10); /* back one char if not at end of line */ | |
1074 | lcd_addr_x--; | |
1075 | } | |
1076 | processed = 1; | |
1077 | break; | |
1078 | ||
1079 | case 'r': /* shift cursor right */ | |
1080 | if (lcd_addr_x < lcd_width) { | |
1081 | if (lcd_addr_x < (lcd_bwidth - 1)) | |
1082 | lcd_write_cmd(0x14); /* allow the cursor to pass the end of the line */ | |
1083 | lcd_addr_x++; | |
1084 | } | |
1085 | processed = 1; | |
1086 | break; | |
1087 | ||
1088 | case 'L': /* shift display left */ | |
1089 | lcd_left_shift++; | |
1090 | lcd_write_cmd(0x18); | |
1091 | processed = 1; | |
1092 | break; | |
1093 | ||
1094 | case 'R': /* shift display right */ | |
1095 | lcd_left_shift--; | |
1096 | lcd_write_cmd(0x1C); | |
1097 | processed = 1; | |
1098 | break; | |
1099 | ||
1100 | case 'k':{ /* kill end of line */ | |
1101 | int x; | |
1102 | for (x = lcd_addr_x; x < lcd_bwidth; x++) | |
1103 | lcd_write_data(' '); | |
1104 | lcd_gotoxy(); /* restore cursor position */ | |
1105 | processed = 1; | |
1106 | break; | |
1107 | } | |
1108 | case 'I': /* reinitialize display */ | |
1109 | lcd_init_display(); | |
1110 | lcd_left_shift = 0; | |
1111 | processed = 1; | |
1112 | break; | |
1113 | ||
1114 | case 'G': /* Generator : LGcxxxxx...xx; */ { | |
1115 | /* must have <c> between '0' and '7', representing the numerical | |
1116 | * ASCII code of the redefined character, and <xx...xx> a sequence | |
1117 | * of 16 hex digits representing 8 bytes for each character. Most | |
1118 | * LCDs will only use 5 lower bits of the 7 first bytes. | |
1119 | */ | |
1120 | ||
1121 | unsigned char cgbytes[8]; | |
1122 | unsigned char cgaddr; | |
1123 | int cgoffset; | |
1124 | int shift; | |
1125 | char value; | |
1126 | int addr; | |
1127 | ||
1128 | if (strchr(esc, ';') == NULL) | |
1129 | break; | |
1130 | ||
1131 | esc++; | |
1132 | ||
1133 | cgaddr = *(esc++) - '0'; | |
1134 | if (cgaddr > 7) { | |
1135 | processed = 1; | |
1136 | break; | |
1137 | } | |
1138 | ||
1139 | cgoffset = 0; | |
1140 | shift = 0; | |
1141 | value = 0; | |
1142 | while (*esc && cgoffset < 8) { | |
1143 | shift ^= 4; | |
1144 | if (*esc >= '0' && *esc <= '9') | |
1145 | value |= (*esc - '0') << shift; | |
1146 | else if (*esc >= 'A' && *esc <= 'Z') | |
1147 | value |= (*esc - 'A' + 10) << shift; | |
1148 | else if (*esc >= 'a' && *esc <= 'z') | |
1149 | value |= (*esc - 'a' + 10) << shift; | |
1150 | else { | |
1151 | esc++; | |
1152 | continue; | |
1153 | } | |
1154 | ||
1155 | if (shift == 0) { | |
1156 | cgbytes[cgoffset++] = value; | |
1157 | value = 0; | |
1158 | } | |
1159 | ||
1160 | esc++; | |
1161 | } | |
1162 | ||
1163 | lcd_write_cmd(0x40 | (cgaddr * 8)); | |
1164 | for (addr = 0; addr < cgoffset; addr++) | |
1165 | lcd_write_data(cgbytes[addr]); | |
1166 | ||
1167 | lcd_gotoxy(); /* ensures that we stop writing to CGRAM */ | |
1168 | processed = 1; | |
1169 | break; | |
1170 | } | |
1171 | case 'x': /* gotoxy : LxXXX[yYYY]; */ | |
1172 | case 'y': /* gotoxy : LyYYY[xXXX]; */ | |
1173 | if (strchr(esc, ';') == NULL) | |
1174 | break; | |
1175 | ||
1176 | while (*esc) { | |
1177 | if (*esc == 'x') { | |
1178 | esc++; | |
1179 | lcd_addr_x = 0; | |
1180 | while (isdigit(*esc)) { | |
1181 | lcd_addr_x = | |
1182 | lcd_addr_x * | |
1183 | 10 + (*esc - | |
1184 | '0'); | |
1185 | esc++; | |
1186 | } | |
1187 | } else if (*esc == 'y') { | |
1188 | esc++; | |
1189 | lcd_addr_y = 0; | |
1190 | while (isdigit(*esc)) { | |
1191 | lcd_addr_y = | |
1192 | lcd_addr_y * | |
1193 | 10 + (*esc - | |
1194 | '0'); | |
1195 | esc++; | |
1196 | } | |
1197 | } else | |
1198 | break; | |
1199 | } | |
1200 | ||
1201 | lcd_gotoxy(); | |
1202 | processed = 1; | |
1203 | break; | |
1204 | } /* end of switch */ | |
1205 | ||
1206 | /* Check wether one flag was changed */ | |
1207 | if (oldflags != lcd_flags) { | |
1208 | /* check wether one of B,C,D flags was changed */ | |
1209 | if ((oldflags ^ lcd_flags) & | |
1210 | (LCD_FLAG_B | LCD_FLAG_C | LCD_FLAG_D)) | |
1211 | /* set display mode */ | |
1212 | lcd_write_cmd(0x08 | | |
1213 | ((lcd_flags & LCD_FLAG_D) ? 4 : 0) | | |
1214 | ((lcd_flags & LCD_FLAG_C) ? 2 : 0) | | |
1215 | ((lcd_flags & LCD_FLAG_B) ? 1 : 0)); | |
1216 | /* check wether one of F,N flags was changed */ | |
1217 | else if ((oldflags ^ lcd_flags) & | |
1218 | (LCD_FLAG_F | LCD_FLAG_N)) | |
1219 | lcd_write_cmd(0x30 | | |
1220 | ((lcd_flags & LCD_FLAG_F) ? 4 : 0) | | |
1221 | ((lcd_flags & LCD_FLAG_N) ? 8 : 0)); | |
1222 | /* check wether L flag was changed */ | |
1223 | else if ((oldflags ^ lcd_flags) & | |
1224 | (LCD_FLAG_L)) { | |
1225 | if (lcd_flags & (LCD_FLAG_L)) | |
1226 | lcd_backlight(1); | |
1227 | else if (light_tempo == 0) /* switch off the light only when the tempo lighting is gone */ | |
1228 | lcd_backlight(0); | |
1229 | } | |
1230 | } | |
7005b584 | 1231 | } |
7005b584 | 1232 | |
698b1515 WT |
1233 | /* LCD special escape codes */ |
1234 | /* flush the escape sequence if it's been processed or if it is | |
1235 | getting too long. */ | |
1236 | if (processed || (lcd_escape_len >= LCD_ESCAPE_LEN)) | |
1237 | lcd_escape_len = -1; | |
1238 | } /* escape codes */ | |
1239 | } | |
7005b584 | 1240 | |
698b1515 | 1241 | return tmp - buf; |
7005b584 WT |
1242 | } |
1243 | ||
698b1515 WT |
1244 | static int lcd_open(struct inode *inode, struct file *file) |
1245 | { | |
1246 | if (lcd_open_cnt) | |
1247 | return -EBUSY; /* open only once at a time */ | |
7005b584 | 1248 | |
698b1515 WT |
1249 | if (file->f_mode & FMODE_READ) /* device is write-only */ |
1250 | return -EPERM; | |
7005b584 | 1251 | |
698b1515 WT |
1252 | if (lcd_must_clear) { |
1253 | lcd_clear_display(); | |
1254 | lcd_must_clear = 0; | |
1255 | } | |
1256 | lcd_open_cnt++; | |
1257 | return 0; | |
7005b584 WT |
1258 | } |
1259 | ||
698b1515 WT |
1260 | static int lcd_release(struct inode *inode, struct file *file) |
1261 | { | |
1262 | lcd_open_cnt--; | |
1263 | return 0; | |
7005b584 WT |
1264 | } |
1265 | ||
7005b584 | 1266 | static struct file_operations lcd_fops = { |
698b1515 WT |
1267 | .write = lcd_write, |
1268 | .open = lcd_open, | |
1269 | .release = lcd_release, | |
7005b584 WT |
1270 | }; |
1271 | ||
1272 | static struct miscdevice lcd_dev = { | |
698b1515 WT |
1273 | LCD_MINOR, |
1274 | "lcd", | |
1275 | &lcd_fops | |
7005b584 WT |
1276 | }; |
1277 | ||
7005b584 | 1278 | /* public function usable from the kernel for any purpose */ |
698b1515 WT |
1279 | void panel_lcd_print(char *s) |
1280 | { | |
1281 | if (lcd_enabled && lcd_initialized) | |
1282 | lcd_write(NULL, s, strlen(s), NULL); | |
7005b584 WT |
1283 | } |
1284 | ||
7005b584 | 1285 | /* initialize the LCD driver */ |
698b1515 WT |
1286 | void lcd_init(void) |
1287 | { | |
1288 | switch (lcd_type) { | |
1289 | case LCD_TYPE_OLD: /* parallel mode, 8 bits */ | |
1290 | if (lcd_proto < 0) | |
1291 | lcd_proto = LCD_PROTO_PARALLEL; | |
1292 | if (lcd_charset < 0) | |
1293 | lcd_charset = LCD_CHARSET_NORMAL; | |
1294 | if (lcd_e_pin == PIN_NOT_SET) | |
1295 | lcd_e_pin = PIN_STROBE; | |
1296 | if (lcd_rs_pin == PIN_NOT_SET) | |
1297 | lcd_rs_pin = PIN_AUTOLF; | |
1298 | ||
1299 | if (lcd_width < 0) | |
1300 | lcd_width = 40; | |
1301 | if (lcd_bwidth < 0) | |
1302 | lcd_bwidth = 40; | |
1303 | if (lcd_hwidth < 0) | |
1304 | lcd_hwidth = 64; | |
1305 | if (lcd_height < 0) | |
1306 | lcd_height = 2; | |
7005b584 | 1307 | break; |
698b1515 WT |
1308 | case LCD_TYPE_KS0074: /* serial mode, ks0074 */ |
1309 | if (lcd_proto < 0) | |
1310 | lcd_proto = LCD_PROTO_SERIAL; | |
1311 | if (lcd_charset < 0) | |
1312 | lcd_charset = LCD_CHARSET_KS0074; | |
1313 | if (lcd_bl_pin == PIN_NOT_SET) | |
1314 | lcd_bl_pin = PIN_AUTOLF; | |
1315 | if (lcd_cl_pin == PIN_NOT_SET) | |
1316 | lcd_cl_pin = PIN_STROBE; | |
1317 | if (lcd_da_pin == PIN_NOT_SET) | |
1318 | lcd_da_pin = PIN_D0; | |
1319 | ||
1320 | if (lcd_width < 0) | |
1321 | lcd_width = 16; | |
1322 | if (lcd_bwidth < 0) | |
1323 | lcd_bwidth = 40; | |
1324 | if (lcd_hwidth < 0) | |
1325 | lcd_hwidth = 16; | |
1326 | if (lcd_height < 0) | |
1327 | lcd_height = 2; | |
7005b584 | 1328 | break; |
698b1515 WT |
1329 | case LCD_TYPE_NEXCOM: /* parallel mode, 8 bits, generic */ |
1330 | if (lcd_proto < 0) | |
1331 | lcd_proto = LCD_PROTO_PARALLEL; | |
1332 | if (lcd_charset < 0) | |
1333 | lcd_charset = LCD_CHARSET_NORMAL; | |
1334 | if (lcd_e_pin == PIN_NOT_SET) | |
1335 | lcd_e_pin = PIN_AUTOLF; | |
1336 | if (lcd_rs_pin == PIN_NOT_SET) | |
1337 | lcd_rs_pin = PIN_SELECP; | |
1338 | if (lcd_rw_pin == PIN_NOT_SET) | |
1339 | lcd_rw_pin = PIN_INITP; | |
1340 | ||
1341 | if (lcd_width < 0) | |
1342 | lcd_width = 16; | |
1343 | if (lcd_bwidth < 0) | |
1344 | lcd_bwidth = 40; | |
1345 | if (lcd_hwidth < 0) | |
1346 | lcd_hwidth = 64; | |
1347 | if (lcd_height < 0) | |
1348 | lcd_height = 2; | |
7005b584 | 1349 | break; |
698b1515 WT |
1350 | case LCD_TYPE_CUSTOM: /* customer-defined */ |
1351 | if (lcd_proto < 0) | |
1352 | lcd_proto = DEFAULT_LCD_PROTO; | |
1353 | if (lcd_charset < 0) | |
1354 | lcd_charset = DEFAULT_LCD_CHARSET; | |
7005b584 WT |
1355 | /* default geometry will be set later */ |
1356 | break; | |
698b1515 WT |
1357 | case LCD_TYPE_HANTRONIX: /* parallel mode, 8 bits, hantronix-like */ |
1358 | default: | |
1359 | if (lcd_proto < 0) | |
1360 | lcd_proto = LCD_PROTO_PARALLEL; | |
1361 | if (lcd_charset < 0) | |
1362 | lcd_charset = LCD_CHARSET_NORMAL; | |
1363 | if (lcd_e_pin == PIN_NOT_SET) | |
1364 | lcd_e_pin = PIN_STROBE; | |
1365 | if (lcd_rs_pin == PIN_NOT_SET) | |
1366 | lcd_rs_pin = PIN_SELECP; | |
1367 | ||
1368 | if (lcd_width < 0) | |
1369 | lcd_width = 16; | |
1370 | if (lcd_bwidth < 0) | |
1371 | lcd_bwidth = 40; | |
1372 | if (lcd_hwidth < 0) | |
1373 | lcd_hwidth = 64; | |
1374 | if (lcd_height < 0) | |
1375 | lcd_height = 2; | |
7005b584 | 1376 | break; |
698b1515 | 1377 | } |
7005b584 | 1378 | |
698b1515 WT |
1379 | /* this is used to catch wrong and default values */ |
1380 | if (lcd_width <= 0) | |
1381 | lcd_width = DEFAULT_LCD_WIDTH; | |
1382 | if (lcd_bwidth <= 0) | |
1383 | lcd_bwidth = DEFAULT_LCD_BWIDTH; | |
1384 | if (lcd_hwidth <= 0) | |
1385 | lcd_hwidth = DEFAULT_LCD_HWIDTH; | |
1386 | if (lcd_height <= 0) | |
1387 | lcd_height = DEFAULT_LCD_HEIGHT; | |
1388 | ||
1389 | if (lcd_proto == LCD_PROTO_SERIAL) { /* SERIAL */ | |
1390 | lcd_write_cmd = lcd_write_cmd_s; | |
1391 | lcd_write_data = lcd_write_data_s; | |
1392 | lcd_clear_fast = lcd_clear_fast_s; | |
1393 | ||
1394 | if (lcd_cl_pin == PIN_NOT_SET) | |
1395 | lcd_cl_pin = DEFAULT_LCD_PIN_SCL; | |
1396 | if (lcd_da_pin == PIN_NOT_SET) | |
1397 | lcd_da_pin = DEFAULT_LCD_PIN_SDA; | |
1398 | ||
1399 | } else { /* PARALLEL */ | |
1400 | lcd_write_cmd = lcd_write_cmd_p8; | |
1401 | lcd_write_data = lcd_write_data_p8; | |
1402 | lcd_clear_fast = lcd_clear_fast_p8; | |
1403 | ||
1404 | if (lcd_e_pin == PIN_NOT_SET) | |
1405 | lcd_e_pin = DEFAULT_LCD_PIN_E; | |
1406 | if (lcd_rs_pin == PIN_NOT_SET) | |
1407 | lcd_rs_pin = DEFAULT_LCD_PIN_RS; | |
1408 | if (lcd_rw_pin == PIN_NOT_SET) | |
1409 | lcd_rw_pin = DEFAULT_LCD_PIN_RW; | |
1410 | } | |
7005b584 | 1411 | |
698b1515 WT |
1412 | if (lcd_bl_pin == PIN_NOT_SET) |
1413 | lcd_bl_pin = DEFAULT_LCD_PIN_BL; | |
7005b584 | 1414 | |
698b1515 WT |
1415 | if (lcd_e_pin == PIN_NOT_SET) |
1416 | lcd_e_pin = PIN_NONE; | |
7005b584 | 1417 | if (lcd_rs_pin == PIN_NOT_SET) |
698b1515 | 1418 | lcd_rs_pin = PIN_NONE; |
7005b584 | 1419 | if (lcd_rw_pin == PIN_NOT_SET) |
698b1515 WT |
1420 | lcd_rw_pin = PIN_NONE; |
1421 | if (lcd_bl_pin == PIN_NOT_SET) | |
1422 | lcd_bl_pin = PIN_NONE; | |
1423 | if (lcd_cl_pin == PIN_NOT_SET) | |
1424 | lcd_cl_pin = PIN_NONE; | |
1425 | if (lcd_da_pin == PIN_NOT_SET) | |
1426 | lcd_da_pin = PIN_NONE; | |
7005b584 | 1427 | |
698b1515 WT |
1428 | if (lcd_charset < 0) |
1429 | lcd_charset = DEFAULT_LCD_CHARSET; | |
7005b584 | 1430 | |
698b1515 WT |
1431 | if (lcd_charset == LCD_CHARSET_KS0074) |
1432 | lcd_char_conv = lcd_char_conv_ks0074; | |
1433 | else | |
1434 | lcd_char_conv = NULL; | |
1435 | ||
1436 | if (lcd_bl_pin != PIN_NONE) | |
1437 | init_scan_timer(); | |
1438 | ||
1439 | pin_to_bits(lcd_e_pin, lcd_bits[LCD_PORT_D][LCD_BIT_E], | |
1440 | lcd_bits[LCD_PORT_C][LCD_BIT_E]); | |
1441 | pin_to_bits(lcd_rs_pin, lcd_bits[LCD_PORT_D][LCD_BIT_RS], | |
1442 | lcd_bits[LCD_PORT_C][LCD_BIT_RS]); | |
1443 | pin_to_bits(lcd_rw_pin, lcd_bits[LCD_PORT_D][LCD_BIT_RW], | |
1444 | lcd_bits[LCD_PORT_C][LCD_BIT_RW]); | |
1445 | pin_to_bits(lcd_bl_pin, lcd_bits[LCD_PORT_D][LCD_BIT_BL], | |
1446 | lcd_bits[LCD_PORT_C][LCD_BIT_BL]); | |
1447 | pin_to_bits(lcd_cl_pin, lcd_bits[LCD_PORT_D][LCD_BIT_CL], | |
1448 | lcd_bits[LCD_PORT_C][LCD_BIT_CL]); | |
1449 | pin_to_bits(lcd_da_pin, lcd_bits[LCD_PORT_D][LCD_BIT_DA], | |
1450 | lcd_bits[LCD_PORT_C][LCD_BIT_DA]); | |
1451 | ||
1452 | /* before this line, we must NOT send anything to the display. | |
1453 | * Since lcd_init_display() needs to write data, we have to | |
1454 | * enable mark the LCD initialized just before. | |
1455 | */ | |
1456 | lcd_initialized = 1; | |
1457 | lcd_init_display(); | |
7005b584 | 1458 | |
698b1515 | 1459 | /* display a short message */ |
7005b584 WT |
1460 | #ifdef CONFIG_PANEL_CHANGE_MESSAGE |
1461 | #ifdef CONFIG_PANEL_BOOT_MESSAGE | |
698b1515 | 1462 | panel_lcd_print("\x1b[Lc\x1b[Lb\x1b[L*" CONFIG_PANEL_BOOT_MESSAGE); |
7005b584 WT |
1463 | #endif |
1464 | #else | |
698b1515 WT |
1465 | panel_lcd_print("\x1b[Lc\x1b[Lb\x1b[L*Linux-" UTS_RELEASE "\nPanel-" |
1466 | PANEL_VERSION); | |
7005b584 | 1467 | #endif |
698b1515 WT |
1468 | lcd_addr_x = lcd_addr_y = 0; |
1469 | lcd_must_clear = 1; /* clear the display on the next device opening */ | |
1470 | lcd_gotoxy(); | |
7005b584 WT |
1471 | } |
1472 | ||
7005b584 WT |
1473 | /* |
1474 | * These are the file operation function for user access to /dev/keypad | |
1475 | */ | |
1476 | ||
698b1515 WT |
1477 | static ssize_t keypad_read(struct file *file, |
1478 | char *buf, size_t count, loff_t *ppos) | |
1479 | { | |
7005b584 | 1480 | |
698b1515 WT |
1481 | unsigned i = *ppos; |
1482 | char *tmp = buf; | |
7005b584 | 1483 | |
698b1515 WT |
1484 | if (keypad_buflen == 0) { |
1485 | if (file->f_flags & O_NONBLOCK) | |
1486 | return -EAGAIN; | |
7005b584 | 1487 | |
698b1515 WT |
1488 | interruptible_sleep_on(&keypad_read_wait); |
1489 | if (signal_pending(current)) | |
1490 | return -EINTR; | |
1491 | } | |
7005b584 | 1492 | |
698b1515 WT |
1493 | for (; count-- > 0 && (keypad_buflen > 0); ++i, ++tmp, --keypad_buflen) { |
1494 | put_user(keypad_buffer[keypad_start], tmp); | |
1495 | keypad_start = (keypad_start + 1) % KEYPAD_BUFFER; | |
1496 | } | |
1497 | *ppos = i; | |
7005b584 | 1498 | |
698b1515 | 1499 | return tmp - buf; |
7005b584 WT |
1500 | } |
1501 | ||
698b1515 WT |
1502 | static int keypad_open(struct inode *inode, struct file *file) |
1503 | { | |
7005b584 | 1504 | |
698b1515 WT |
1505 | if (keypad_open_cnt) |
1506 | return -EBUSY; /* open only once at a time */ | |
7005b584 | 1507 | |
698b1515 WT |
1508 | if (file->f_mode & FMODE_WRITE) /* device is read-only */ |
1509 | return -EPERM; | |
7005b584 | 1510 | |
698b1515 WT |
1511 | keypad_buflen = 0; /* flush the buffer on opening */ |
1512 | keypad_open_cnt++; | |
1513 | return 0; | |
7005b584 WT |
1514 | } |
1515 | ||
698b1515 WT |
1516 | static int keypad_release(struct inode *inode, struct file *file) |
1517 | { | |
1518 | keypad_open_cnt--; | |
1519 | return 0; | |
7005b584 WT |
1520 | } |
1521 | ||
1522 | static struct file_operations keypad_fops = { | |
698b1515 WT |
1523 | .read = keypad_read, /* read */ |
1524 | .open = keypad_open, /* open */ | |
1525 | .release = keypad_release, /* close */ | |
7005b584 WT |
1526 | }; |
1527 | ||
1528 | static struct miscdevice keypad_dev = { | |
698b1515 WT |
1529 | KEYPAD_MINOR, |
1530 | "keypad", | |
1531 | &keypad_fops | |
7005b584 WT |
1532 | }; |
1533 | ||
698b1515 WT |
1534 | static void keypad_send_key(char *string, int max_len) |
1535 | { | |
1536 | if (init_in_progress) | |
1537 | return; | |
1538 | ||
1539 | /* send the key to the device only if a process is attached to it. */ | |
1540 | if (keypad_open_cnt > 0) { | |
1541 | while (max_len-- && keypad_buflen < KEYPAD_BUFFER && *string) { | |
1542 | keypad_buffer[(keypad_start + keypad_buflen++) % | |
1543 | KEYPAD_BUFFER] = *string++; | |
1544 | } | |
1545 | wake_up_interruptible(&keypad_read_wait); | |
7005b584 | 1546 | } |
7005b584 WT |
1547 | } |
1548 | ||
7005b584 WT |
1549 | /* this function scans all the bits involving at least one logical signal, and puts the |
1550 | * results in the bitfield "phys_read" (one bit per established contact), and sets | |
1551 | * "phys_read_prev" to "phys_read". | |
1552 | * | |
1553 | * Note: to debounce input signals, we will only consider as switched a signal which is | |
1554 | * stable across 2 measures. Signals which are different between two reads will be kept | |
1555 | * as they previously were in their logical form (phys_prev). A signal which has just | |
1556 | * switched will have a 1 in (phys_read ^ phys_read_prev). | |
1557 | */ | |
698b1515 WT |
1558 | static void phys_scan_contacts(void) |
1559 | { | |
1560 | int bit, bitval; | |
1561 | char oldval; | |
1562 | char bitmask; | |
1563 | char gndmask; | |
1564 | ||
1565 | phys_prev = phys_curr; | |
1566 | phys_read_prev = phys_read; | |
1567 | phys_read = 0; /* flush all signals */ | |
1568 | ||
1569 | oldval = r_dtr(pprt) | scan_mask_o; /* keep track of old value, with all outputs disabled */ | |
1570 | w_dtr(pprt, oldval & ~scan_mask_o); /* activate all keyboard outputs (active low) */ | |
1571 | bitmask = PNL_PINPUT(r_str(pprt)) & scan_mask_i; /* will have a 1 for each bit set to gnd */ | |
1572 | w_dtr(pprt, oldval); /* disable all matrix signals */ | |
1573 | ||
1574 | /* now that all outputs are cleared, the only active input bits are | |
1575 | * directly connected to the ground | |
7005b584 | 1576 | */ |
698b1515 WT |
1577 | gndmask = PNL_PINPUT(r_str(pprt)) & scan_mask_i; /* 1 for each grounded input */ |
1578 | ||
1579 | phys_read |= (pmask_t) gndmask << 40; /* grounded inputs are signals 40-44 */ | |
7005b584 | 1580 | |
698b1515 WT |
1581 | if (bitmask != gndmask) { |
1582 | /* since clearing the outputs changed some inputs, we know that some | |
1583 | * input signals are currently tied to some outputs. So we'll scan them. | |
1584 | */ | |
1585 | for (bit = 0; bit < 8; bit++) { | |
1586 | bitval = 1 << bit; | |
7005b584 | 1587 | |
698b1515 WT |
1588 | if (!(scan_mask_o & bitval)) /* skip unused bits */ |
1589 | continue; | |
1590 | ||
1591 | w_dtr(pprt, oldval & ~bitval); /* enable this output */ | |
1592 | bitmask = PNL_PINPUT(r_str(pprt)) & ~gndmask; | |
1593 | phys_read |= (pmask_t) bitmask << (5 * bit); | |
1594 | } | |
1595 | w_dtr(pprt, oldval); /* disable all outputs */ | |
7005b584 | 1596 | } |
698b1515 WT |
1597 | /* this is easy: use old bits when they are flapping, use new ones when stable */ |
1598 | phys_curr = | |
1599 | (phys_prev & (phys_read ^ phys_read_prev)) | (phys_read & | |
1600 | ~(phys_read ^ | |
1601 | phys_read_prev)); | |
7005b584 WT |
1602 | } |
1603 | ||
698b1515 WT |
1604 | static void panel_process_inputs(void) |
1605 | { | |
1606 | struct list_head *item; | |
1607 | struct logical_input *input; | |
7005b584 WT |
1608 | |
1609 | #if 0 | |
698b1515 WT |
1610 | printk(KERN_DEBUG |
1611 | "entering panel_process_inputs with pp=%016Lx & pc=%016Lx\n", | |
1612 | phys_prev, phys_curr); | |
7005b584 WT |
1613 | #endif |
1614 | ||
698b1515 WT |
1615 | keypressed = 0; |
1616 | inputs_stable = 1; | |
1617 | list_for_each(item, &logical_inputs) { | |
1618 | input = list_entry(item, struct logical_input, list); | |
1619 | ||
1620 | switch (input->state) { | |
1621 | case INPUT_ST_LOW: | |
1622 | if ((phys_curr & input->mask) != input->value) | |
1623 | break; | |
1624 | /* if all needed ones were already set previously, this means that | |
1625 | * this logical signal has been activated by the releasing of | |
1626 | * another combined signal, so we don't want to match. | |
1627 | * eg: AB -(release B)-> A -(release A)-> 0 : don't match A. | |
1628 | */ | |
1629 | if ((phys_prev & input->mask) == input->value) | |
1630 | break; | |
1631 | input->rise_timer = 0; | |
1632 | input->state = INPUT_ST_RISING; | |
1633 | /* no break here, fall through */ | |
1634 | case INPUT_ST_RISING: | |
1635 | if ((phys_curr & input->mask) != input->value) { | |
1636 | input->state = INPUT_ST_LOW; | |
1637 | break; | |
1638 | } | |
1639 | if (input->rise_timer < input->rise_time) { | |
1640 | inputs_stable = 0; | |
1641 | input->rise_timer++; | |
1642 | break; | |
1643 | } | |
1644 | input->high_timer = 0; | |
1645 | input->state = INPUT_ST_HIGH; | |
1646 | /* no break here, fall through */ | |
1647 | case INPUT_ST_HIGH: | |
7005b584 | 1648 | #if 0 |
698b1515 WT |
1649 | /* FIXME: |
1650 | * this is an invalid test. It tries to catch transitions from single-key | |
1651 | * to multiple-key, but doesn't take into account the contacts polarity. | |
1652 | * The only solution to the problem is to parse keys from the most complex | |
1653 | * to the simplest combinations, and mark them as 'caught' once a combination | |
1654 | * matches, then unmatch it for all other ones. | |
1655 | */ | |
1656 | ||
1657 | /* try to catch dangerous transitions cases : | |
1658 | * someone adds a bit, so this signal was a false | |
1659 | * positive resulting from a transition. We should invalidate | |
1660 | * the signal immediately and not call the release function. | |
1661 | * eg: 0 -(press A)-> A -(press B)-> AB : don't match A's release. | |
1662 | */ | |
1663 | if (((phys_prev & input->mask) == input->value) | |
1664 | && ((phys_curr & input->mask) > input->value)) { | |
1665 | input->state = INPUT_ST_LOW; /* invalidate */ | |
1666 | break; | |
1667 | } | |
7005b584 WT |
1668 | #endif |
1669 | ||
698b1515 WT |
1670 | if ((phys_curr & input->mask) == input->value) { |
1671 | if ((input->type == INPUT_TYPE_STD) | |
1672 | && (input->high_timer == 0)) { | |
1673 | input->high_timer++; | |
1674 | if (input->u.std.press_fct != NULL) | |
1675 | input->u.std.press_fct(input->u. | |
1676 | std. | |
1677 | press_data); | |
1678 | } else if (input->type == INPUT_TYPE_KBD) { | |
1679 | keypressed = 1; /* will turn on the light */ | |
1680 | ||
1681 | if (input->high_timer == 0) { | |
1682 | if (input->u.kbd.press_str[0]) | |
1683 | keypad_send_key(input-> | |
1684 | u.kbd. | |
1685 | press_str, | |
1686 | sizeof | |
1687 | (input-> | |
1688 | u.kbd. | |
1689 | press_str)); | |
1690 | } | |
1691 | ||
1692 | if (input->u.kbd.repeat_str[0]) { | |
1693 | if (input->high_timer >= | |
1694 | KEYPAD_REP_START) { | |
1695 | input->high_timer -= | |
1696 | KEYPAD_REP_DELAY; | |
1697 | keypad_send_key(input-> | |
1698 | u.kbd. | |
1699 | repeat_str, | |
1700 | sizeof | |
1701 | (input-> | |
1702 | u.kbd. | |
1703 | repeat_str)); | |
1704 | } | |
1705 | inputs_stable = 0; /* we will need to come back here soon */ | |
1706 | } | |
1707 | ||
1708 | if (input->high_timer < 255) | |
1709 | input->high_timer++; | |
1710 | } | |
1711 | break; | |
1712 | } else { | |
1713 | /* else signal falling down. Let's fall through. */ | |
1714 | input->state = INPUT_ST_FALLING; | |
1715 | input->fall_timer = 0; | |
7005b584 | 1716 | } |
698b1515 WT |
1717 | /* no break here, fall through */ |
1718 | case INPUT_ST_FALLING: | |
7005b584 | 1719 | #if 0 |
698b1515 WT |
1720 | /* FIXME !!! same comment as above */ |
1721 | if (((phys_prev & input->mask) == input->value) | |
1722 | && ((phys_curr & input->mask) > input->value)) { | |
1723 | input->state = INPUT_ST_LOW; /* invalidate */ | |
1724 | break; | |
1725 | } | |
7005b584 WT |
1726 | #endif |
1727 | ||
698b1515 WT |
1728 | if ((phys_curr & input->mask) == input->value) { |
1729 | if (input->type == INPUT_TYPE_KBD) { | |
1730 | keypressed = 1; /* will turn on the light */ | |
1731 | ||
1732 | if (input->u.kbd.repeat_str[0]) { | |
1733 | if (input->high_timer >= KEYPAD_REP_START) | |
1734 | input->high_timer -= KEYPAD_REP_DELAY; | |
1735 | keypad_send_key(input->u.kbd.repeat_str, | |
1736 | sizeof(input->u.kbd.repeat_str)); | |
1737 | inputs_stable = 0; /* we will need to come back here soon */ | |
1738 | } | |
1739 | ||
1740 | if (input->high_timer < 255) | |
1741 | input->high_timer++; | |
1742 | } | |
1743 | input->state = INPUT_ST_HIGH; | |
1744 | break; | |
1745 | } else if (input->fall_timer >= input->fall_time) { | |
1746 | /* call release event */ | |
1747 | if (input->type == INPUT_TYPE_STD) { | |
1748 | if (input->u.std.release_fct != NULL) | |
1749 | input->u.std.release_fct(input->u.std.release_data); | |
1750 | ||
1751 | } else if (input->type == INPUT_TYPE_KBD) { | |
1752 | if (input->u.kbd.release_str[0]) | |
1753 | keypad_send_key(input->u.kbd.release_str, | |
1754 | sizeof(input->u.kbd.release_str)); | |
1755 | } | |
1756 | ||
1757 | input->state = INPUT_ST_LOW; | |
1758 | break; | |
1759 | } else { | |
1760 | input->fall_timer++; | |
1761 | inputs_stable = 0; | |
1762 | break; | |
1763 | } | |
1764 | } | |
1765 | } | |
1766 | } | |
7005b584 | 1767 | |
698b1515 WT |
1768 | static void panel_scan_timer(void) |
1769 | { | |
63023177 | 1770 | if (keypad_enabled && keypad_initialized) { |
698b1515 WT |
1771 | if (spin_trylock(&pprt_lock)) { |
1772 | phys_scan_contacts(); | |
1773 | spin_unlock(&pprt_lock); /* no need for the parport anymore */ | |
7005b584 WT |
1774 | } |
1775 | ||
698b1515 WT |
1776 | if (!inputs_stable || phys_curr != phys_prev) |
1777 | panel_process_inputs(); | |
7005b584 | 1778 | } |
7005b584 | 1779 | |
698b1515 WT |
1780 | if (lcd_enabled && lcd_initialized) { |
1781 | if (keypressed) { | |
1782 | if (light_tempo == 0 && ((lcd_flags & LCD_FLAG_L) == 0)) | |
1783 | lcd_backlight(1); | |
1784 | light_tempo = FLASH_LIGHT_TEMPO; | |
1785 | } else if (light_tempo > 0) { | |
1786 | light_tempo--; | |
1787 | if (light_tempo == 0 && ((lcd_flags & LCD_FLAG_L) == 0)) | |
1788 | lcd_backlight(0); | |
1789 | } | |
1790 | } | |
1791 | ||
1792 | mod_timer(&scan_timer, jiffies + INPUT_POLL_TIME); | |
7005b584 WT |
1793 | } |
1794 | ||
698b1515 WT |
1795 | static void init_scan_timer(void) |
1796 | { | |
1797 | if (scan_timer.function != NULL) | |
1798 | return; /* already started */ | |
1799 | ||
1800 | init_timer(&scan_timer); | |
1801 | scan_timer.expires = jiffies + INPUT_POLL_TIME; | |
1802 | scan_timer.data = 0; | |
1803 | scan_timer.function = (void *)&panel_scan_timer; | |
1804 | add_timer(&scan_timer); | |
7005b584 WT |
1805 | } |
1806 | ||
1807 | /* converts a name of the form "({BbAaPpSsEe}{01234567-})*" to a series of bits. | |
1808 | * if <omask> or <imask> are non-null, they will be or'ed with the bits corresponding | |
1809 | * to out and in bits respectively. | |
1810 | * returns 1 if ok, 0 if error (in which case, nothing is written). | |
1811 | */ | |
698b1515 WT |
1812 | static int input_name2mask(char *name, pmask_t *mask, pmask_t *value, |
1813 | char *imask, char *omask) | |
1814 | { | |
1815 | static char sigtab[10] = "EeSsPpAaBb"; | |
1816 | char im, om; | |
1817 | pmask_t m, v; | |
1818 | ||
1819 | om = im = m = v = 0ULL; | |
1820 | while (*name) { | |
1821 | int in, out, bit, neg; | |
1822 | for (in = 0; (in < sizeof(sigtab)) && (sigtab[in] != *name); in++) | |
1823 | ; | |
1824 | if (in >= sizeof(sigtab)) | |
1825 | return 0; /* input name not found */ | |
1826 | neg = (in & 1); /* odd (lower) names are negated */ | |
1827 | in >>= 1; | |
1828 | im |= (1 << in); | |
1829 | ||
1830 | name++; | |
1831 | if (isdigit(*name)) { | |
1832 | out = *name - '0'; | |
1833 | om |= (1 << out); | |
1834 | } else if (*name == '-') | |
1835 | out = 8; | |
1836 | else | |
1837 | return 0; /* unknown bit name */ | |
1838 | ||
1839 | bit = (out * 5) + in; | |
1840 | ||
1841 | m |= 1ULL << bit; | |
1842 | if (!neg) | |
1843 | v |= 1ULL << bit; | |
1844 | name++; | |
7005b584 | 1845 | } |
698b1515 WT |
1846 | *mask = m; |
1847 | *value = v; | |
1848 | if (imask) | |
1849 | *imask |= im; | |
1850 | if (omask) | |
1851 | *omask |= om; | |
1852 | return 1; | |
7005b584 WT |
1853 | } |
1854 | ||
1855 | /* tries to bind a key to the signal name <name>. The key will send the | |
1856 | * strings <press>, <repeat>, <release> for these respective events. | |
1857 | * Returns the pointer to the new key if ok, NULL if the key could not be bound. | |
1858 | */ | |
698b1515 WT |
1859 | static struct logical_input *panel_bind_key(char *name, char *press, |
1860 | char *repeat, char *release) | |
1861 | { | |
1862 | struct logical_input *key; | |
1863 | ||
1864 | key = kmalloc(sizeof(struct logical_input), GFP_KERNEL); | |
1865 | if (!key) { | |
1866 | printk(KERN_ERR "panel: not enough memory\n"); | |
1867 | return NULL; | |
1868 | } | |
1869 | memset(key, 0, sizeof(struct logical_input)); | |
1870 | if (!input_name2mask(name, &key->mask, &key->value, &scan_mask_i, | |
1871 | &scan_mask_o)) | |
1872 | return NULL; | |
1873 | ||
1874 | key->type = INPUT_TYPE_KBD; | |
1875 | key->state = INPUT_ST_LOW; | |
1876 | key->rise_time = 1; | |
1877 | key->fall_time = 1; | |
7005b584 WT |
1878 | |
1879 | #if 0 | |
698b1515 WT |
1880 | printk(KERN_DEBUG "bind: <%s> : m=%016Lx v=%016Lx\n", name, key->mask, |
1881 | key->value); | |
7005b584 | 1882 | #endif |
698b1515 WT |
1883 | strncpy(key->u.kbd.press_str, press, sizeof(key->u.kbd.press_str)); |
1884 | strncpy(key->u.kbd.repeat_str, repeat, sizeof(key->u.kbd.repeat_str)); | |
1885 | strncpy(key->u.kbd.release_str, release, | |
1886 | sizeof(key->u.kbd.release_str)); | |
1887 | list_add(&key->list, &logical_inputs); | |
1888 | return key; | |
7005b584 WT |
1889 | } |
1890 | ||
63023177 | 1891 | #if 0 |
7005b584 WT |
1892 | /* tries to bind a callback function to the signal name <name>. The function |
1893 | * <press_fct> will be called with the <press_data> arg when the signal is | |
1894 | * activated, and so on for <release_fct>/<release_data> | |
1895 | * Returns the pointer to the new signal if ok, NULL if the signal could not be bound. | |
1896 | */ | |
1897 | static struct logical_input *panel_bind_callback(char *name, | |
698b1515 WT |
1898 | void (*press_fct) (int), |
1899 | int press_data, | |
1900 | void (*release_fct) (int), | |
1901 | int release_data) | |
1902 | { | |
1903 | struct logical_input *callback; | |
1904 | ||
1905 | callback = kmalloc(sizeof(struct logical_input), GFP_KERNEL); | |
1906 | if (!callback) { | |
1907 | printk(KERN_ERR "panel: not enough memory\n"); | |
1908 | return NULL; | |
1909 | } | |
1910 | memset(callback, 0, sizeof(struct logical_input)); | |
1911 | if (!input_name2mask(name, &callback->mask, &callback->value, | |
1912 | &scan_mask_i, &scan_mask_o)) | |
1913 | return NULL; | |
1914 | ||
1915 | callback->type = INPUT_TYPE_STD; | |
1916 | callback->state = INPUT_ST_LOW; | |
1917 | callback->rise_time = 1; | |
1918 | callback->fall_time = 1; | |
1919 | callback->u.std.press_fct = press_fct; | |
1920 | callback->u.std.press_data = press_data; | |
1921 | callback->u.std.release_fct = release_fct; | |
1922 | callback->u.std.release_data = release_data; | |
1923 | list_add(&callback->list, &logical_inputs); | |
1924 | return callback; | |
7005b584 | 1925 | } |
63023177 | 1926 | #endif |
7005b584 | 1927 | |
698b1515 WT |
1928 | static void keypad_init(void) |
1929 | { | |
1930 | int keynum; | |
1931 | init_waitqueue_head(&keypad_read_wait); | |
1932 | keypad_buflen = 0; /* flushes any eventual noisy keystroke */ | |
7005b584 | 1933 | |
698b1515 | 1934 | /* Let's create all known keys */ |
7005b584 | 1935 | |
698b1515 WT |
1936 | for (keynum = 0; keypad_profile[keynum][0][0]; keynum++) { |
1937 | panel_bind_key(keypad_profile[keynum][0], | |
1938 | keypad_profile[keynum][1], | |
1939 | keypad_profile[keynum][2], | |
1940 | keypad_profile[keynum][3]); | |
1941 | } | |
7005b584 | 1942 | |
698b1515 WT |
1943 | init_scan_timer(); |
1944 | keypad_initialized = 1; | |
7005b584 WT |
1945 | } |
1946 | ||
7005b584 WT |
1947 | /**************************************************/ |
1948 | /* device initialization */ | |
1949 | /**************************************************/ | |
1950 | ||
698b1515 WT |
1951 | static int panel_notify_sys(struct notifier_block *this, unsigned long code, |
1952 | void *unused) | |
1953 | { | |
1954 | if (lcd_enabled && lcd_initialized) { | |
1955 | switch (code) { | |
1956 | case SYS_DOWN: | |
1957 | panel_lcd_print | |
1958 | ("\x0cReloading\nSystem...\x1b[Lc\x1b[Lb\x1b[L+"); | |
1959 | break; | |
1960 | case SYS_HALT: | |
1961 | panel_lcd_print | |
1962 | ("\x0cSystem Halted.\x1b[Lc\x1b[Lb\x1b[L+"); | |
1963 | break; | |
1964 | case SYS_POWER_OFF: | |
1965 | panel_lcd_print("\x0cPower off.\x1b[Lc\x1b[Lb\x1b[L+"); | |
1966 | break; | |
1967 | default: | |
1968 | break; | |
1969 | } | |
7005b584 | 1970 | } |
698b1515 | 1971 | return NOTIFY_DONE; |
7005b584 WT |
1972 | } |
1973 | ||
1974 | static struct notifier_block panel_notifier = { | |
1975 | panel_notify_sys, | |
1976 | NULL, | |
1977 | 0 | |
1978 | }; | |
1979 | ||
698b1515 | 1980 | static void panel_attach(struct parport *port) |
7005b584 | 1981 | { |
698b1515 WT |
1982 | if (port->number != parport) |
1983 | return; | |
1984 | ||
1985 | if (pprt) { | |
1986 | printk(KERN_ERR | |
1987 | "panel_attach(): port->number=%d parport=%d, already registered !\n", | |
1988 | port->number, parport); | |
1989 | return; | |
1990 | } | |
1991 | ||
1992 | pprt = parport_register_device(port, "panel", NULL, NULL, /* pf, kf */ | |
1993 | NULL, | |
1994 | /*PARPORT_DEV_EXCL */ | |
1995 | 0, (void *)&pprt); | |
1996 | ||
1997 | if (parport_claim(pprt)) { | |
1998 | printk(KERN_ERR | |
1999 | "Panel: could not claim access to parport%d. Aborting.\n", | |
2000 | parport); | |
2001 | return; | |
2002 | } | |
2003 | ||
2004 | /* must init LCD first, just in case an IRQ from the keypad is generated at keypad init */ | |
2005 | if (lcd_enabled) { | |
2006 | lcd_init(); | |
2007 | misc_register(&lcd_dev); | |
2008 | } | |
2009 | ||
2010 | if (keypad_enabled) { | |
2011 | keypad_init(); | |
2012 | misc_register(&keypad_dev); | |
2013 | } | |
7005b584 WT |
2014 | } |
2015 | ||
698b1515 | 2016 | static void panel_detach(struct parport *port) |
7005b584 | 2017 | { |
698b1515 WT |
2018 | if (port->number != parport) |
2019 | return; | |
2020 | ||
2021 | if (!pprt) { | |
2022 | printk(KERN_ERR | |
2023 | "panel_detach(): port->number=%d parport=%d, nothing to unregister.\n", | |
2024 | port->number, parport); | |
2025 | return; | |
2026 | } | |
2027 | ||
698b1515 WT |
2028 | if (keypad_enabled && keypad_initialized) |
2029 | misc_deregister(&keypad_dev); | |
2030 | ||
2031 | if (lcd_enabled && lcd_initialized) | |
2032 | misc_deregister(&lcd_dev); | |
2033 | ||
2034 | parport_release(pprt); | |
2035 | parport_unregister_device(pprt); | |
2036 | pprt = NULL; | |
7005b584 WT |
2037 | } |
2038 | ||
2039 | static struct parport_driver panel_driver = { | |
698b1515 WT |
2040 | .name = "panel", |
2041 | .attach = panel_attach, | |
2042 | .detach = panel_detach, | |
7005b584 WT |
2043 | }; |
2044 | ||
2045 | /* init function */ | |
698b1515 WT |
2046 | int panel_init(void) |
2047 | { | |
2048 | /* for backwards compatibility */ | |
2049 | if (keypad_type < 0) | |
2050 | keypad_type = keypad_enabled; | |
2051 | ||
2052 | if (lcd_type < 0) | |
2053 | lcd_type = lcd_enabled; | |
2054 | ||
2055 | if (parport < 0) | |
2056 | parport = DEFAULT_PARPORT; | |
2057 | ||
2058 | /* take care of an eventual profile */ | |
2059 | switch (profile) { | |
2060 | case PANEL_PROFILE_CUSTOM: /* custom profile */ | |
2061 | if (keypad_type < 0) | |
2062 | keypad_type = DEFAULT_KEYPAD; | |
698b1515 WT |
2063 | if (lcd_type < 0) |
2064 | lcd_type = DEFAULT_LCD; | |
2065 | break; | |
2066 | case PANEL_PROFILE_OLD: /* 8 bits, 2*16, old keypad */ | |
2067 | if (keypad_type < 0) | |
2068 | keypad_type = KEYPAD_TYPE_OLD; | |
698b1515 WT |
2069 | if (lcd_type < 0) |
2070 | lcd_type = LCD_TYPE_OLD; | |
2071 | if (lcd_width < 0) | |
2072 | lcd_width = 16; | |
2073 | if (lcd_hwidth < 0) | |
2074 | lcd_hwidth = 16; | |
2075 | break; | |
2076 | case PANEL_PROFILE_NEW: /* serial, 2*16, new keypad */ | |
2077 | if (keypad_type < 0) | |
2078 | keypad_type = KEYPAD_TYPE_NEW; | |
698b1515 WT |
2079 | if (lcd_type < 0) |
2080 | lcd_type = LCD_TYPE_KS0074; | |
2081 | break; | |
2082 | case PANEL_PROFILE_HANTRONIX: /* 8 bits, 2*16 hantronix-like, no keypad */ | |
2083 | if (keypad_type < 0) | |
2084 | keypad_type = KEYPAD_TYPE_NONE; | |
698b1515 WT |
2085 | if (lcd_type < 0) |
2086 | lcd_type = LCD_TYPE_HANTRONIX; | |
2087 | break; | |
2088 | case PANEL_PROFILE_NEXCOM: /* generic 8 bits, 2*16, nexcom keypad, eg. Nexcom. */ | |
2089 | if (keypad_type < 0) | |
2090 | keypad_type = KEYPAD_TYPE_NEXCOM; | |
698b1515 WT |
2091 | if (lcd_type < 0) |
2092 | lcd_type = LCD_TYPE_NEXCOM; | |
2093 | break; | |
2094 | case PANEL_PROFILE_LARGE: /* 8 bits, 2*40, old keypad */ | |
2095 | if (keypad_type < 0) | |
2096 | keypad_type = KEYPAD_TYPE_OLD; | |
698b1515 WT |
2097 | if (lcd_type < 0) |
2098 | lcd_type = LCD_TYPE_OLD; | |
2099 | break; | |
2100 | } | |
2101 | ||
2102 | lcd_enabled = (lcd_type > 0); | |
2103 | keypad_enabled = (keypad_type > 0); | |
2104 | ||
2105 | switch (keypad_type) { | |
2106 | case KEYPAD_TYPE_OLD: | |
2107 | keypad_profile = old_keypad_profile; | |
2108 | break; | |
2109 | case KEYPAD_TYPE_NEW: | |
2110 | keypad_profile = new_keypad_profile; | |
2111 | break; | |
2112 | case KEYPAD_TYPE_NEXCOM: | |
2113 | keypad_profile = nexcom_keypad_profile; | |
2114 | break; | |
2115 | default: | |
2116 | keypad_profile = NULL; | |
2117 | break; | |
2118 | } | |
2119 | ||
2120 | /* tells various subsystems about the fact that we are initializing */ | |
2121 | init_in_progress = 1; | |
2122 | ||
2123 | if (parport_register_driver(&panel_driver)) { | |
2124 | printk(KERN_ERR | |
2125 | "Panel: could not register with parport. Aborting.\n"); | |
2126 | return -EIO; | |
2127 | } | |
2128 | ||
63023177 WT |
2129 | if (!lcd_enabled && !keypad_enabled) { |
2130 | /* no device enabled, let's release the parport */ | |
698b1515 WT |
2131 | if (pprt) { |
2132 | parport_release(pprt); | |
2133 | parport_unregister_device(pprt); | |
2134 | } | |
2135 | parport_unregister_driver(&panel_driver); | |
2136 | printk(KERN_ERR "Panel driver version " PANEL_VERSION | |
2137 | " disabled.\n"); | |
2138 | return -ENODEV; | |
7005b584 | 2139 | } |
7005b584 | 2140 | |
698b1515 WT |
2141 | register_reboot_notifier(&panel_notifier); |
2142 | ||
2143 | if (pprt) | |
2144 | printk(KERN_INFO "Panel driver version " PANEL_VERSION | |
2145 | " registered on parport%d (io=0x%lx).\n", parport, | |
2146 | pprt->port->base); | |
2147 | else | |
2148 | printk(KERN_INFO "Panel driver version " PANEL_VERSION | |
2149 | " not yet registered\n"); | |
2150 | /* tells various subsystems about the fact that initialization is finished */ | |
2151 | init_in_progress = 0; | |
2152 | return 0; | |
2153 | } | |
7005b584 | 2154 | |
f6d1fcfe | 2155 | static int __init panel_init_module(void) |
698b1515 WT |
2156 | { |
2157 | return panel_init(); | |
7005b584 WT |
2158 | } |
2159 | ||
f6d1fcfe | 2160 | static void __exit panel_cleanup_module(void) |
698b1515 WT |
2161 | { |
2162 | unregister_reboot_notifier(&panel_notifier); | |
7005b584 | 2163 | |
698b1515 WT |
2164 | if (scan_timer.function != NULL) |
2165 | del_timer(&scan_timer); | |
7005b584 | 2166 | |
5789813e CL |
2167 | if (pprt != NULL) { |
2168 | if (keypad_enabled) | |
2169 | misc_deregister(&keypad_dev); | |
2170 | ||
2171 | if (lcd_enabled) { | |
2172 | panel_lcd_print("\x0cLCD driver " PANEL_VERSION | |
2173 | "\nunloaded.\x1b[Lc\x1b[Lb\x1b[L-"); | |
2174 | misc_deregister(&lcd_dev); | |
2175 | } | |
7005b584 | 2176 | |
5789813e CL |
2177 | /* TODO: free all input signals */ |
2178 | parport_release(pprt); | |
2179 | parport_unregister_device(pprt); | |
698b1515 | 2180 | } |
698b1515 | 2181 | parport_unregister_driver(&panel_driver); |
7005b584 | 2182 | } |
7005b584 | 2183 | |
7005b584 WT |
2184 | module_init(panel_init_module); |
2185 | module_exit(panel_cleanup_module); | |
2186 | MODULE_AUTHOR("Willy Tarreau"); | |
2187 | MODULE_LICENSE("GPL"); | |
7005b584 WT |
2188 | |
2189 | /* | |
2190 | * Local variables: | |
2191 | * c-indent-level: 4 | |
2192 | * tab-width: 8 | |
2193 | * End: | |
2194 | */ |