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 | ||
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> | |
7005b584 WT |
44 | #include <linux/interrupt.h> |
45 | #include <linux/miscdevice.h> | |
698b1515 | 46 | #include <linux/slab.h> |
7005b584 WT |
47 | #include <linux/ioport.h> |
48 | #include <linux/fcntl.h> | |
49 | #include <linux/init.h> | |
50 | #include <linux/delay.h> | |
51 | #include <linux/ctype.h> | |
52 | #include <linux/parport.h> | |
53 | #include <linux/version.h> | |
54 | #include <linux/list.h> | |
55 | #include <linux/notifier.h> | |
56 | #include <linux/reboot.h> | |
273b281f | 57 | #include <generated/utsrelease.h> |
7005b584 | 58 | |
698b1515 | 59 | #include <linux/io.h> |
48f658bb | 60 | #include <linux/uaccess.h> |
7005b584 WT |
61 | #include <asm/system.h> |
62 | ||
7005b584 WT |
63 | #define LCD_MINOR 156 |
64 | #define KEYPAD_MINOR 185 | |
7005b584 WT |
65 | |
66 | #define PANEL_VERSION "0.9.5" | |
67 | ||
68 | #define LCD_MAXBYTES 256 /* max burst write */ | |
69 | ||
7005b584 | 70 | #define KEYPAD_BUFFER 64 |
7005b584 | 71 | |
429ccf05 HH |
72 | /* poll the keyboard this every second */ |
73 | #define INPUT_POLL_TIME (HZ/50) | |
74 | /* a key starts to repeat after this times INPUT_POLL_TIME */ | |
75 | #define KEYPAD_REP_START (10) | |
76 | /* a key repeats this times INPUT_POLL_TIME */ | |
77 | #define KEYPAD_REP_DELAY (2) | |
78 | ||
79 | /* keep the light on this times INPUT_POLL_TIME for each flash */ | |
80 | #define FLASH_LIGHT_TEMPO (200) | |
7005b584 WT |
81 | |
82 | /* converts an r_str() input to an active high, bits string : 000BAOSE */ | |
83 | #define PNL_PINPUT(a) ((((unsigned char)(a)) ^ 0x7F) >> 3) | |
84 | ||
698b1515 WT |
85 | #define PNL_PBUSY 0x80 /* inverted input, active low */ |
86 | #define PNL_PACK 0x40 /* direct input, active low */ | |
87 | #define PNL_POUTPA 0x20 /* direct input, active high */ | |
88 | #define PNL_PSELECD 0x10 /* direct input, active high */ | |
89 | #define PNL_PERRORP 0x08 /* direct input, active low */ | |
7005b584 | 90 | |
698b1515 | 91 | #define PNL_PBIDIR 0x20 /* bi-directional ports */ |
429ccf05 HH |
92 | /* high to read data in or-ed with data out */ |
93 | #define PNL_PINTEN 0x10 | |
698b1515 WT |
94 | #define PNL_PSELECP 0x08 /* inverted output, active low */ |
95 | #define PNL_PINITP 0x04 /* direct output, active low */ | |
96 | #define PNL_PAUTOLF 0x02 /* inverted output, active low */ | |
97 | #define PNL_PSTROBE 0x01 /* inverted output */ | |
7005b584 WT |
98 | |
99 | #define PNL_PD0 0x01 | |
100 | #define PNL_PD1 0x02 | |
101 | #define PNL_PD2 0x04 | |
102 | #define PNL_PD3 0x08 | |
103 | #define PNL_PD4 0x10 | |
104 | #define PNL_PD5 0x20 | |
105 | #define PNL_PD6 0x40 | |
106 | #define PNL_PD7 0x80 | |
107 | ||
108 | #define PIN_NONE 0 | |
109 | #define PIN_STROBE 1 | |
110 | #define PIN_D0 2 | |
111 | #define PIN_D1 3 | |
112 | #define PIN_D2 4 | |
113 | #define PIN_D3 5 | |
114 | #define PIN_D4 6 | |
115 | #define PIN_D5 7 | |
116 | #define PIN_D6 8 | |
117 | #define PIN_D7 9 | |
118 | #define PIN_AUTOLF 14 | |
119 | #define PIN_INITP 16 | |
120 | #define PIN_SELECP 17 | |
121 | #define PIN_NOT_SET 127 | |
122 | ||
7005b584 WT |
123 | #define LCD_FLAG_S 0x0001 |
124 | #define LCD_FLAG_ID 0x0002 | |
125 | #define LCD_FLAG_B 0x0004 /* blink on */ | |
126 | #define LCD_FLAG_C 0x0008 /* cursor on */ | |
127 | #define LCD_FLAG_D 0x0010 /* display on */ | |
128 | #define LCD_FLAG_F 0x0020 /* large font mode */ | |
129 | #define LCD_FLAG_N 0x0040 /* 2-rows mode */ | |
130 | #define LCD_FLAG_L 0x0080 /* backlight enabled */ | |
131 | ||
429ccf05 | 132 | #define LCD_ESCAPE_LEN 24 /* max chars for LCD escape command */ |
7005b584 WT |
133 | #define LCD_ESCAPE_CHAR 27 /* use char 27 for escape command */ |
134 | ||
135 | /* macros to simplify use of the parallel port */ | |
136 | #define r_ctr(x) (parport_read_control((x)->port)) | |
137 | #define r_dtr(x) (parport_read_data((x)->port)) | |
138 | #define r_str(x) (parport_read_status((x)->port)) | |
698b1515 WT |
139 | #define w_ctr(x, y) do { parport_write_control((x)->port, (y)); } while (0) |
140 | #define w_dtr(x, y) do { parport_write_data((x)->port, (y)); } while (0) | |
7005b584 WT |
141 | |
142 | /* this defines which bits are to be used and which ones to be ignored */ | |
429ccf05 HH |
143 | /* logical or of the output bits involved in the scan matrix */ |
144 | static __u8 scan_mask_o; | |
145 | /* logical or of the input bits involved in the scan matrix */ | |
146 | static __u8 scan_mask_i; | |
7005b584 | 147 | |
698b1515 | 148 | typedef __u64 pmask_t; |
7005b584 WT |
149 | |
150 | enum input_type { | |
698b1515 WT |
151 | INPUT_TYPE_STD, |
152 | INPUT_TYPE_KBD, | |
7005b584 WT |
153 | }; |
154 | ||
155 | enum input_state { | |
698b1515 WT |
156 | INPUT_ST_LOW, |
157 | INPUT_ST_RISING, | |
158 | INPUT_ST_HIGH, | |
159 | INPUT_ST_FALLING, | |
7005b584 WT |
160 | }; |
161 | ||
162 | struct logical_input { | |
698b1515 WT |
163 | struct list_head list; |
164 | pmask_t mask; | |
165 | pmask_t value; | |
166 | enum input_type type; | |
167 | enum input_state state; | |
168 | __u8 rise_time, fall_time; | |
169 | __u8 rise_timer, fall_timer, high_timer; | |
170 | ||
171 | union { | |
429ccf05 | 172 | struct { /* valid when type == INPUT_TYPE_STD */ |
698b1515 WT |
173 | void (*press_fct) (int); |
174 | void (*release_fct) (int); | |
175 | int press_data; | |
176 | int release_data; | |
177 | } std; | |
429ccf05 HH |
178 | struct { /* valid when type == INPUT_TYPE_KBD */ |
179 | /* strings can be non null-terminated */ | |
698b1515 WT |
180 | char press_str[sizeof(void *) + sizeof(int)]; |
181 | char repeat_str[sizeof(void *) + sizeof(int)]; | |
182 | char release_str[sizeof(void *) + sizeof(int)]; | |
183 | } kbd; | |
184 | } u; | |
7005b584 WT |
185 | }; |
186 | ||
698b1515 | 187 | LIST_HEAD(logical_inputs); /* list of all defined logical inputs */ |
7005b584 WT |
188 | |
189 | /* physical contacts history | |
190 | * Physical contacts are a 45 bits string of 9 groups of 5 bits each. | |
191 | * The 8 lower groups correspond to output bits 0 to 7, and the 9th group | |
192 | * corresponds to the ground. | |
193 | * Within each group, bits are stored in the same order as read on the port : | |
194 | * BAPSE (busy=4, ack=3, paper empty=2, select=1, error=0). | |
195 | * So, each __u64 (or pmask_t) is represented like this : | |
196 | * 0000000000000000000BAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSE | |
197 | * <-----unused------><gnd><d07><d06><d05><d04><d03><d02><d01><d00> | |
198 | */ | |
429ccf05 HH |
199 | |
200 | /* what has just been read from the I/O ports */ | |
201 | static pmask_t phys_read; | |
202 | /* previous phys_read */ | |
203 | static pmask_t phys_read_prev; | |
204 | /* stabilized phys_read (phys_read|phys_read_prev) */ | |
205 | static pmask_t phys_curr; | |
206 | /* previous phys_curr */ | |
207 | static pmask_t phys_prev; | |
208 | /* 0 means that at least one logical signal needs be computed */ | |
209 | static char inputs_stable; | |
7005b584 | 210 | |
7005b584 WT |
211 | /* these variables are specific to the keypad */ |
212 | static char keypad_buffer[KEYPAD_BUFFER]; | |
698b1515 WT |
213 | static int keypad_buflen; |
214 | static int keypad_start; | |
215 | static char keypressed; | |
7005b584 | 216 | static wait_queue_head_t keypad_read_wait; |
7005b584 WT |
217 | |
218 | /* lcd-specific variables */ | |
429ccf05 HH |
219 | |
220 | /* contains the LCD config state */ | |
221 | static unsigned long int lcd_flags; | |
222 | /* contains the LCD X offset */ | |
223 | static unsigned long int lcd_addr_x; | |
224 | /* contains the LCD Y offset */ | |
225 | static unsigned long int lcd_addr_y; | |
226 | /* current escape sequence, 0 terminated */ | |
227 | static char lcd_escape[LCD_ESCAPE_LEN + 1]; | |
228 | /* not in escape state. >=0 = escape cmd len */ | |
229 | static int lcd_escape_len = -1; | |
7005b584 | 230 | |
7005b584 WT |
231 | /* |
232 | * Bit masks to convert LCD signals to parallel port outputs. | |
233 | * _d_ are values for data port, _c_ are for control port. | |
234 | * [0] = signal OFF, [1] = signal ON, [2] = mask | |
235 | */ | |
698b1515 WT |
236 | #define BIT_CLR 0 |
237 | #define BIT_SET 1 | |
238 | #define BIT_MSK 2 | |
7005b584 WT |
239 | #define BIT_STATES 3 |
240 | /* | |
241 | * one entry for each bit on the LCD | |
242 | */ | |
243 | #define LCD_BIT_E 0 | |
244 | #define LCD_BIT_RS 1 | |
245 | #define LCD_BIT_RW 2 | |
246 | #define LCD_BIT_BL 3 | |
247 | #define LCD_BIT_CL 4 | |
248 | #define LCD_BIT_DA 5 | |
249 | #define LCD_BITS 6 | |
250 | ||
251 | /* | |
252 | * each bit can be either connected to a DATA or CTRL port | |
253 | */ | |
254 | #define LCD_PORT_C 0 | |
255 | #define LCD_PORT_D 1 | |
256 | #define LCD_PORTS 2 | |
257 | ||
258 | static unsigned char lcd_bits[LCD_PORTS][LCD_BITS][BIT_STATES]; | |
259 | ||
260 | /* | |
261 | * LCD protocols | |
262 | */ | |
263 | #define LCD_PROTO_PARALLEL 0 | |
264 | #define LCD_PROTO_SERIAL 1 | |
77943d31 | 265 | #define LCD_PROTO_TI_DA8XX_LCD 2 |
7005b584 WT |
266 | |
267 | /* | |
268 | * LCD character sets | |
269 | */ | |
270 | #define LCD_CHARSET_NORMAL 0 | |
271 | #define LCD_CHARSET_KS0074 1 | |
272 | ||
273 | /* | |
274 | * LCD types | |
275 | */ | |
276 | #define LCD_TYPE_NONE 0 | |
277 | #define LCD_TYPE_OLD 1 | |
278 | #define LCD_TYPE_KS0074 2 | |
279 | #define LCD_TYPE_HANTRONIX 3 | |
280 | #define LCD_TYPE_NEXCOM 4 | |
281 | #define LCD_TYPE_CUSTOM 5 | |
282 | ||
283 | /* | |
284 | * keypad types | |
285 | */ | |
286 | #define KEYPAD_TYPE_NONE 0 | |
287 | #define KEYPAD_TYPE_OLD 1 | |
288 | #define KEYPAD_TYPE_NEW 2 | |
289 | #define KEYPAD_TYPE_NEXCOM 3 | |
290 | ||
291 | /* | |
292 | * panel profiles | |
293 | */ | |
294 | #define PANEL_PROFILE_CUSTOM 0 | |
295 | #define PANEL_PROFILE_OLD 1 | |
296 | #define PANEL_PROFILE_NEW 2 | |
297 | #define PANEL_PROFILE_HANTRONIX 3 | |
298 | #define PANEL_PROFILE_NEXCOM 4 | |
299 | #define PANEL_PROFILE_LARGE 5 | |
300 | ||
301 | /* | |
302 | * Construct custom config from the kernel's configuration | |
303 | */ | |
304 | #define DEFAULT_PROFILE PANEL_PROFILE_LARGE | |
305 | #define DEFAULT_PARPORT 0 | |
306 | #define DEFAULT_LCD LCD_TYPE_OLD | |
307 | #define DEFAULT_KEYPAD KEYPAD_TYPE_OLD | |
7005b584 WT |
308 | #define DEFAULT_LCD_WIDTH 40 |
309 | #define DEFAULT_LCD_BWIDTH 40 | |
310 | #define DEFAULT_LCD_HWIDTH 64 | |
311 | #define DEFAULT_LCD_HEIGHT 2 | |
312 | #define DEFAULT_LCD_PROTO LCD_PROTO_PARALLEL | |
313 | ||
314 | #define DEFAULT_LCD_PIN_E PIN_AUTOLF | |
315 | #define DEFAULT_LCD_PIN_RS PIN_SELECP | |
316 | #define DEFAULT_LCD_PIN_RW PIN_INITP | |
317 | #define DEFAULT_LCD_PIN_SCL PIN_STROBE | |
318 | #define DEFAULT_LCD_PIN_SDA PIN_D0 | |
319 | #define DEFAULT_LCD_PIN_BL PIN_NOT_SET | |
320 | #define DEFAULT_LCD_CHARSET LCD_CHARSET_NORMAL | |
321 | ||
322 | #ifdef CONFIG_PANEL_PROFILE | |
323 | #undef DEFAULT_PROFILE | |
324 | #define DEFAULT_PROFILE CONFIG_PANEL_PROFILE | |
325 | #endif | |
326 | ||
327 | #ifdef CONFIG_PANEL_PARPORT | |
328 | #undef DEFAULT_PARPORT | |
329 | #define DEFAULT_PARPORT CONFIG_PANEL_PARPORT | |
330 | #endif | |
331 | ||
698b1515 | 332 | #if DEFAULT_PROFILE == 0 /* custom */ |
7005b584 WT |
333 | #ifdef CONFIG_PANEL_KEYPAD |
334 | #undef DEFAULT_KEYPAD | |
335 | #define DEFAULT_KEYPAD CONFIG_PANEL_KEYPAD | |
336 | #endif | |
337 | ||
7005b584 WT |
338 | #ifdef CONFIG_PANEL_LCD |
339 | #undef DEFAULT_LCD | |
340 | #define DEFAULT_LCD CONFIG_PANEL_LCD | |
341 | #endif | |
342 | ||
343 | #ifdef CONFIG_PANEL_LCD_WIDTH | |
344 | #undef DEFAULT_LCD_WIDTH | |
345 | #define DEFAULT_LCD_WIDTH CONFIG_PANEL_LCD_WIDTH | |
346 | #endif | |
347 | ||
348 | #ifdef CONFIG_PANEL_LCD_BWIDTH | |
349 | #undef DEFAULT_LCD_BWIDTH | |
350 | #define DEFAULT_LCD_BWIDTH CONFIG_PANEL_LCD_BWIDTH | |
351 | #endif | |
352 | ||
353 | #ifdef CONFIG_PANEL_LCD_HWIDTH | |
354 | #undef DEFAULT_LCD_HWIDTH | |
355 | #define DEFAULT_LCD_HWIDTH CONFIG_PANEL_LCD_HWIDTH | |
356 | #endif | |
357 | ||
358 | #ifdef CONFIG_PANEL_LCD_HEIGHT | |
359 | #undef DEFAULT_LCD_HEIGHT | |
360 | #define DEFAULT_LCD_HEIGHT CONFIG_PANEL_LCD_HEIGHT | |
361 | #endif | |
362 | ||
363 | #ifdef CONFIG_PANEL_LCD_PROTO | |
364 | #undef DEFAULT_LCD_PROTO | |
365 | #define DEFAULT_LCD_PROTO CONFIG_PANEL_LCD_PROTO | |
366 | #endif | |
367 | ||
368 | #ifdef CONFIG_PANEL_LCD_PIN_E | |
369 | #undef DEFAULT_LCD_PIN_E | |
370 | #define DEFAULT_LCD_PIN_E CONFIG_PANEL_LCD_PIN_E | |
371 | #endif | |
372 | ||
373 | #ifdef CONFIG_PANEL_LCD_PIN_RS | |
374 | #undef DEFAULT_LCD_PIN_RS | |
375 | #define DEFAULT_LCD_PIN_RS CONFIG_PANEL_LCD_PIN_RS | |
376 | #endif | |
377 | ||
378 | #ifdef CONFIG_PANEL_LCD_PIN_RW | |
379 | #undef DEFAULT_LCD_PIN_RW | |
380 | #define DEFAULT_LCD_PIN_RW CONFIG_PANEL_LCD_PIN_RW | |
381 | #endif | |
382 | ||
383 | #ifdef CONFIG_PANEL_LCD_PIN_SCL | |
384 | #undef DEFAULT_LCD_PIN_SCL | |
385 | #define DEFAULT_LCD_PIN_SCL CONFIG_PANEL_LCD_PIN_SCL | |
386 | #endif | |
387 | ||
388 | #ifdef CONFIG_PANEL_LCD_PIN_SDA | |
389 | #undef DEFAULT_LCD_PIN_SDA | |
390 | #define DEFAULT_LCD_PIN_SDA CONFIG_PANEL_LCD_PIN_SDA | |
391 | #endif | |
392 | ||
393 | #ifdef CONFIG_PANEL_LCD_PIN_BL | |
394 | #undef DEFAULT_LCD_PIN_BL | |
395 | #define DEFAULT_LCD_PIN_BL CONFIG_PANEL_LCD_PIN_BL | |
396 | #endif | |
397 | ||
398 | #ifdef CONFIG_PANEL_LCD_CHARSET | |
399 | #undef DEFAULT_LCD_CHARSET | |
a6a6c908 | 400 | #define DEFAULT_LCD_CHARSET CONFIG_PANEL_LCD_CHARSET |
7005b584 WT |
401 | #endif |
402 | ||
403 | #endif /* DEFAULT_PROFILE == 0 */ | |
404 | ||
405 | /* global variables */ | |
698b1515 WT |
406 | static int keypad_open_cnt; /* #times opened */ |
407 | static int lcd_open_cnt; /* #times opened */ | |
698b1515 | 408 | static struct pardevice *pprt; |
7005b584 | 409 | |
f6d1fcfe WT |
410 | static int lcd_initialized; |
411 | static int keypad_initialized; | |
7005b584 | 412 | |
698b1515 | 413 | static int light_tempo; |
7005b584 | 414 | |
698b1515 WT |
415 | static char lcd_must_clear; |
416 | static char lcd_left_shift; | |
417 | static char init_in_progress; | |
7005b584 | 418 | |
698b1515 WT |
419 | static void (*lcd_write_cmd) (int); |
420 | static void (*lcd_write_data) (int); | |
421 | static void (*lcd_clear_fast) (void); | |
7005b584 | 422 | |
698b1515 | 423 | static DEFINE_SPINLOCK(pprt_lock); |
7005b584 WT |
424 | static struct timer_list scan_timer; |
425 | ||
63023177 | 426 | MODULE_DESCRIPTION("Generic parallel port LCD/Keypad driver"); |
f6d1fcfe WT |
427 | |
428 | static int parport = -1; | |
698b1515 WT |
429 | module_param(parport, int, 0000); |
430 | MODULE_PARM_DESC(parport, "Parallel port index (0=lpt1, 1=lpt2, ...)"); | |
f6d1fcfe WT |
431 | |
432 | static int lcd_height = -1; | |
698b1515 WT |
433 | module_param(lcd_height, int, 0000); |
434 | MODULE_PARM_DESC(lcd_height, "Number of lines on the LCD"); | |
f6d1fcfe WT |
435 | |
436 | static int lcd_width = -1; | |
698b1515 WT |
437 | module_param(lcd_width, int, 0000); |
438 | MODULE_PARM_DESC(lcd_width, "Number of columns on the LCD"); | |
f6d1fcfe WT |
439 | |
440 | static int lcd_bwidth = -1; /* internal buffer width (usually 40) */ | |
698b1515 WT |
441 | module_param(lcd_bwidth, int, 0000); |
442 | MODULE_PARM_DESC(lcd_bwidth, "Internal LCD line width (40)"); | |
f6d1fcfe WT |
443 | |
444 | static int lcd_hwidth = -1; /* hardware buffer width (usually 64) */ | |
698b1515 WT |
445 | module_param(lcd_hwidth, int, 0000); |
446 | MODULE_PARM_DESC(lcd_hwidth, "LCD line hardware address (64)"); | |
f6d1fcfe WT |
447 | |
448 | static int lcd_enabled = -1; | |
698b1515 WT |
449 | module_param(lcd_enabled, int, 0000); |
450 | MODULE_PARM_DESC(lcd_enabled, "Deprecated option, use lcd_type instead"); | |
f6d1fcfe WT |
451 | |
452 | static int keypad_enabled = -1; | |
698b1515 WT |
453 | module_param(keypad_enabled, int, 0000); |
454 | MODULE_PARM_DESC(keypad_enabled, "Deprecated option, use keypad_type instead"); | |
f6d1fcfe WT |
455 | |
456 | static int lcd_type = -1; | |
698b1515 WT |
457 | module_param(lcd_type, int, 0000); |
458 | MODULE_PARM_DESC(lcd_type, | |
429ccf05 HH |
459 | "LCD type: 0=none, 1=old //, 2=serial ks0074, " |
460 | "3=hantronix //, 4=nexcom //, 5=compiled-in"); | |
f6d1fcfe WT |
461 | |
462 | static int lcd_proto = -1; | |
698b1515 | 463 | module_param(lcd_proto, int, 0000); |
429ccf05 HH |
464 | MODULE_PARM_DESC(lcd_proto, |
465 | "LCD communication: 0=parallel (//), 1=serial," | |
77943d31 | 466 | "2=TI LCD Interface"); |
f6d1fcfe WT |
467 | |
468 | static int lcd_charset = -1; | |
698b1515 WT |
469 | module_param(lcd_charset, int, 0000); |
470 | MODULE_PARM_DESC(lcd_charset, "LCD character set: 0=standard, 1=KS0074"); | |
f6d1fcfe WT |
471 | |
472 | static int keypad_type = -1; | |
698b1515 WT |
473 | module_param(keypad_type, int, 0000); |
474 | MODULE_PARM_DESC(keypad_type, | |
429ccf05 HH |
475 | "Keypad type: 0=none, 1=old 6 keys, 2=new 6+1 keys, " |
476 | "3=nexcom 4 keys"); | |
f6d1fcfe | 477 | |
f6d1fcfe | 478 | static int profile = DEFAULT_PROFILE; |
698b1515 WT |
479 | module_param(profile, int, 0000); |
480 | MODULE_PARM_DESC(profile, | |
429ccf05 HH |
481 | "1=16x2 old kp; 2=serial 16x2, new kp; 3=16x2 hantronix; " |
482 | "4=16x2 nexcom; default=40x2, old kp"); | |
698b1515 | 483 | |
f6d1fcfe WT |
484 | /* |
485 | * These are the parallel port pins the LCD control signals are connected to. | |
486 | * Set this to 0 if the signal is not used. Set it to its opposite value | |
487 | * (negative) if the signal is negated. -MAXINT is used to indicate that the | |
488 | * pin has not been explicitly specified. | |
489 | * | |
63023177 | 490 | * WARNING! no check will be performed about collisions with keypad ! |
f6d1fcfe WT |
491 | */ |
492 | ||
493 | static int lcd_e_pin = PIN_NOT_SET; | |
698b1515 WT |
494 | module_param(lcd_e_pin, int, 0000); |
495 | MODULE_PARM_DESC(lcd_e_pin, | |
429ccf05 HH |
496 | "# of the // port pin connected to LCD 'E' signal, " |
497 | "with polarity (-17..17)"); | |
f6d1fcfe WT |
498 | |
499 | static int lcd_rs_pin = PIN_NOT_SET; | |
698b1515 WT |
500 | module_param(lcd_rs_pin, int, 0000); |
501 | MODULE_PARM_DESC(lcd_rs_pin, | |
429ccf05 HH |
502 | "# of the // port pin connected to LCD 'RS' signal, " |
503 | "with polarity (-17..17)"); | |
f6d1fcfe WT |
504 | |
505 | static int lcd_rw_pin = PIN_NOT_SET; | |
698b1515 WT |
506 | module_param(lcd_rw_pin, int, 0000); |
507 | MODULE_PARM_DESC(lcd_rw_pin, | |
429ccf05 HH |
508 | "# of the // port pin connected to LCD 'RW' signal, " |
509 | "with polarity (-17..17)"); | |
f6d1fcfe WT |
510 | |
511 | static int lcd_bl_pin = PIN_NOT_SET; | |
698b1515 WT |
512 | module_param(lcd_bl_pin, int, 0000); |
513 | MODULE_PARM_DESC(lcd_bl_pin, | |
429ccf05 HH |
514 | "# of the // port pin connected to LCD backlight, " |
515 | "with polarity (-17..17)"); | |
f6d1fcfe WT |
516 | |
517 | static int lcd_da_pin = PIN_NOT_SET; | |
698b1515 WT |
518 | module_param(lcd_da_pin, int, 0000); |
519 | MODULE_PARM_DESC(lcd_da_pin, | |
429ccf05 HH |
520 | "# of the // port pin connected to serial LCD 'SDA' " |
521 | "signal, with polarity (-17..17)"); | |
f6d1fcfe WT |
522 | |
523 | static int lcd_cl_pin = PIN_NOT_SET; | |
698b1515 WT |
524 | module_param(lcd_cl_pin, int, 0000); |
525 | MODULE_PARM_DESC(lcd_cl_pin, | |
429ccf05 HH |
526 | "# of the // port pin connected to serial LCD 'SCL' " |
527 | "signal, with polarity (-17..17)"); | |
7005b584 | 528 | |
698b1515 | 529 | static unsigned char *lcd_char_conv; |
7005b584 WT |
530 | |
531 | /* for some LCD drivers (ks0074) we need a charset conversion table. */ | |
532 | static unsigned char lcd_char_conv_ks0074[256] = { | |
698b1515 WT |
533 | /* 0|8 1|9 2|A 3|B 4|C 5|D 6|E 7|F */ |
534 | /* 0x00 */ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, | |
535 | /* 0x08 */ 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, | |
536 | /* 0x10 */ 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, | |
537 | /* 0x18 */ 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, | |
538 | /* 0x20 */ 0x20, 0x21, 0x22, 0x23, 0xa2, 0x25, 0x26, 0x27, | |
539 | /* 0x28 */ 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, | |
540 | /* 0x30 */ 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, | |
541 | /* 0x38 */ 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, | |
542 | /* 0x40 */ 0xa0, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, | |
543 | /* 0x48 */ 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, | |
544 | /* 0x50 */ 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, | |
545 | /* 0x58 */ 0x58, 0x59, 0x5a, 0xfa, 0xfb, 0xfc, 0x1d, 0xc4, | |
546 | /* 0x60 */ 0x96, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, | |
547 | /* 0x68 */ 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, | |
548 | /* 0x70 */ 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, | |
549 | /* 0x78 */ 0x78, 0x79, 0x7a, 0xfd, 0xfe, 0xff, 0xce, 0x20, | |
550 | /* 0x80 */ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, | |
551 | /* 0x88 */ 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, | |
552 | /* 0x90 */ 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, | |
553 | /* 0x98 */ 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, | |
554 | /* 0xA0 */ 0x20, 0x40, 0xb1, 0xa1, 0x24, 0xa3, 0xfe, 0x5f, | |
555 | /* 0xA8 */ 0x22, 0xc8, 0x61, 0x14, 0x97, 0x2d, 0xad, 0x96, | |
556 | /* 0xB0 */ 0x80, 0x8c, 0x82, 0x83, 0x27, 0x8f, 0x86, 0xdd, | |
557 | /* 0xB8 */ 0x2c, 0x81, 0x6f, 0x15, 0x8b, 0x8a, 0x84, 0x60, | |
558 | /* 0xC0 */ 0xe2, 0xe2, 0xe2, 0x5b, 0x5b, 0xae, 0xbc, 0xa9, | |
559 | /* 0xC8 */ 0xc5, 0xbf, 0xc6, 0xf1, 0xe3, 0xe3, 0xe3, 0xe3, | |
560 | /* 0xD0 */ 0x44, 0x5d, 0xa8, 0xe4, 0xec, 0xec, 0x5c, 0x78, | |
561 | /* 0xD8 */ 0xab, 0xa6, 0xe5, 0x5e, 0x5e, 0xe6, 0xaa, 0xbe, | |
562 | /* 0xE0 */ 0x7f, 0xe7, 0xaf, 0x7b, 0x7b, 0xaf, 0xbd, 0xc8, | |
563 | /* 0xE8 */ 0xa4, 0xa5, 0xc7, 0xf6, 0xa7, 0xe8, 0x69, 0x69, | |
564 | /* 0xF0 */ 0xed, 0x7d, 0xa8, 0xe4, 0xec, 0x5c, 0x5c, 0x25, | |
565 | /* 0xF8 */ 0xac, 0xa6, 0xea, 0xef, 0x7e, 0xeb, 0xb2, 0x79, | |
7005b584 WT |
566 | }; |
567 | ||
568 | char old_keypad_profile[][4][9] = { | |
698b1515 WT |
569 | {"S0", "Left\n", "Left\n", ""}, |
570 | {"S1", "Down\n", "Down\n", ""}, | |
571 | {"S2", "Up\n", "Up\n", ""}, | |
572 | {"S3", "Right\n", "Right\n", ""}, | |
573 | {"S4", "Esc\n", "Esc\n", ""}, | |
574 | {"S5", "Ret\n", "Ret\n", ""}, | |
575 | {"", "", "", ""} | |
7005b584 WT |
576 | }; |
577 | ||
578 | /* signals, press, repeat, release */ | |
579 | char new_keypad_profile[][4][9] = { | |
698b1515 WT |
580 | {"S0", "Left\n", "Left\n", ""}, |
581 | {"S1", "Down\n", "Down\n", ""}, | |
582 | {"S2", "Up\n", "Up\n", ""}, | |
583 | {"S3", "Right\n", "Right\n", ""}, | |
584 | {"S4s5", "", "Esc\n", "Esc\n"}, | |
585 | {"s4S5", "", "Ret\n", "Ret\n"}, | |
586 | {"S4S5", "Help\n", "", ""}, | |
587 | /* add new signals above this line */ | |
588 | {"", "", "", ""} | |
7005b584 WT |
589 | }; |
590 | ||
591 | /* signals, press, repeat, release */ | |
592 | char nexcom_keypad_profile[][4][9] = { | |
698b1515 WT |
593 | {"a-p-e-", "Down\n", "Down\n", ""}, |
594 | {"a-p-E-", "Ret\n", "Ret\n", ""}, | |
595 | {"a-P-E-", "Esc\n", "Esc\n", ""}, | |
596 | {"a-P-e-", "Up\n", "Up\n", ""}, | |
597 | /* add new signals above this line */ | |
598 | {"", "", "", ""} | |
7005b584 WT |
599 | }; |
600 | ||
601 | static char (*keypad_profile)[4][9] = old_keypad_profile; | |
602 | ||
603 | /* FIXME: this should be converted to a bit array containing signals states */ | |
604 | static struct { | |
429ccf05 HH |
605 | unsigned char e; /* parallel LCD E (data latch on falling edge) */ |
606 | unsigned char rs; /* parallel LCD RS (0 = cmd, 1 = data) */ | |
607 | unsigned char rw; /* parallel LCD R/W (0 = W, 1 = R) */ | |
608 | unsigned char bl; /* parallel LCD backlight (0 = off, 1 = on) */ | |
609 | unsigned char cl; /* serial LCD clock (latch on rising edge) */ | |
610 | unsigned char da; /* serial LCD data */ | |
7005b584 WT |
611 | } bits; |
612 | ||
613 | static void init_scan_timer(void); | |
614 | ||
615 | /* sets data port bits according to current signals values */ | |
698b1515 WT |
616 | static int set_data_bits(void) |
617 | { | |
618 | int val, bit; | |
619 | ||
620 | val = r_dtr(pprt); | |
621 | for (bit = 0; bit < LCD_BITS; bit++) | |
622 | val &= lcd_bits[LCD_PORT_D][bit][BIT_MSK]; | |
623 | ||
624 | val |= lcd_bits[LCD_PORT_D][LCD_BIT_E][bits.e] | |
625 | | lcd_bits[LCD_PORT_D][LCD_BIT_RS][bits.rs] | |
626 | | lcd_bits[LCD_PORT_D][LCD_BIT_RW][bits.rw] | |
627 | | lcd_bits[LCD_PORT_D][LCD_BIT_BL][bits.bl] | |
628 | | lcd_bits[LCD_PORT_D][LCD_BIT_CL][bits.cl] | |
629 | | lcd_bits[LCD_PORT_D][LCD_BIT_DA][bits.da]; | |
630 | ||
631 | w_dtr(pprt, val); | |
632 | return val; | |
7005b584 WT |
633 | } |
634 | ||
635 | /* sets ctrl port bits according to current signals values */ | |
698b1515 WT |
636 | static int set_ctrl_bits(void) |
637 | { | |
638 | int val, bit; | |
639 | ||
640 | val = r_ctr(pprt); | |
641 | for (bit = 0; bit < LCD_BITS; bit++) | |
642 | val &= lcd_bits[LCD_PORT_C][bit][BIT_MSK]; | |
643 | ||
644 | val |= lcd_bits[LCD_PORT_C][LCD_BIT_E][bits.e] | |
645 | | lcd_bits[LCD_PORT_C][LCD_BIT_RS][bits.rs] | |
646 | | lcd_bits[LCD_PORT_C][LCD_BIT_RW][bits.rw] | |
647 | | lcd_bits[LCD_PORT_C][LCD_BIT_BL][bits.bl] | |
648 | | lcd_bits[LCD_PORT_C][LCD_BIT_CL][bits.cl] | |
649 | | lcd_bits[LCD_PORT_C][LCD_BIT_DA][bits.da]; | |
650 | ||
651 | w_ctr(pprt, val); | |
652 | return val; | |
7005b584 WT |
653 | } |
654 | ||
655 | /* sets ctrl & data port bits according to current signals values */ | |
6136ac86 | 656 | static void panel_set_bits(void) |
698b1515 WT |
657 | { |
658 | set_data_bits(); | |
659 | set_ctrl_bits(); | |
7005b584 WT |
660 | } |
661 | ||
662 | /* | |
663 | * Converts a parallel port pin (from -25 to 25) to data and control ports | |
664 | * masks, and data and control port bits. The signal will be considered | |
665 | * unconnected if it's on pin 0 or an invalid pin (<-25 or >25). | |
666 | * | |
667 | * Result will be used this way : | |
668 | * out(dport, in(dport) & d_val[2] | d_val[signal_state]) | |
669 | * out(cport, in(cport) & c_val[2] | c_val[signal_state]) | |
670 | */ | |
698b1515 WT |
671 | void pin_to_bits(int pin, unsigned char *d_val, unsigned char *c_val) |
672 | { | |
673 | int d_bit, c_bit, inv; | |
674 | ||
675 | d_val[0] = c_val[0] = d_val[1] = c_val[1] = 0; | |
676 | d_val[2] = c_val[2] = 0xFF; | |
677 | ||
678 | if (pin == 0) | |
679 | return; | |
680 | ||
681 | inv = (pin < 0); | |
682 | if (inv) | |
683 | pin = -pin; | |
684 | ||
685 | d_bit = c_bit = 0; | |
686 | ||
687 | switch (pin) { | |
688 | case PIN_STROBE: /* strobe, inverted */ | |
689 | c_bit = PNL_PSTROBE; | |
690 | inv = !inv; | |
691 | break; | |
692 | case PIN_D0...PIN_D7: /* D0 - D7 = 2 - 9 */ | |
693 | d_bit = 1 << (pin - 2); | |
694 | break; | |
695 | case PIN_AUTOLF: /* autofeed, inverted */ | |
696 | c_bit = PNL_PAUTOLF; | |
697 | inv = !inv; | |
698 | break; | |
429ccf05 | 699 | case PIN_INITP: /* init, direct */ |
698b1515 WT |
700 | c_bit = PNL_PINITP; |
701 | break; | |
702 | case PIN_SELECP: /* select_in, inverted */ | |
703 | c_bit = PNL_PSELECP; | |
704 | inv = !inv; | |
705 | break; | |
706 | default: /* unknown pin, ignore */ | |
707 | break; | |
708 | } | |
709 | ||
710 | if (c_bit) { | |
711 | c_val[2] &= ~c_bit; | |
712 | c_val[!inv] = c_bit; | |
713 | } else if (d_bit) { | |
714 | d_val[2] &= ~d_bit; | |
715 | d_val[!inv] = d_bit; | |
716 | } | |
7005b584 WT |
717 | } |
718 | ||
719 | /* sleeps that many milliseconds with a reschedule */ | |
698b1515 WT |
720 | static void long_sleep(int ms) |
721 | { | |
7005b584 | 722 | |
698b1515 WT |
723 | if (in_interrupt()) |
724 | mdelay(ms); | |
725 | else { | |
726 | current->state = TASK_INTERRUPTIBLE; | |
727 | schedule_timeout((ms * HZ + 999) / 1000); | |
728 | } | |
729 | } | |
7005b584 | 730 | |
429ccf05 HH |
731 | /* send a serial byte to the LCD panel. The caller is responsible for locking |
732 | if needed. */ | |
698b1515 WT |
733 | static void lcd_send_serial(int byte) |
734 | { | |
735 | int bit; | |
736 | ||
737 | /* the data bit is set on D0, and the clock on STROBE. | |
429ccf05 | 738 | * LCD reads D0 on STROBE's rising edge. */ |
698b1515 WT |
739 | for (bit = 0; bit < 8; bit++) { |
740 | bits.cl = BIT_CLR; /* CLK low */ | |
6136ac86 | 741 | panel_set_bits(); |
698b1515 | 742 | bits.da = byte & 1; |
6136ac86 | 743 | panel_set_bits(); |
429ccf05 | 744 | udelay(2); /* maintain the data during 2 us before CLK up */ |
698b1515 | 745 | bits.cl = BIT_SET; /* CLK high */ |
6136ac86 | 746 | panel_set_bits(); |
429ccf05 | 747 | udelay(1); /* maintain the strobe during 1 us */ |
698b1515 WT |
748 | byte >>= 1; |
749 | } | |
7005b584 WT |
750 | } |
751 | ||
752 | /* turn the backlight on or off */ | |
698b1515 WT |
753 | static void lcd_backlight(int on) |
754 | { | |
755 | if (lcd_bl_pin == PIN_NONE) | |
756 | return; | |
757 | ||
758 | /* The backlight is activated by seting the AUTOFEED line to +5V */ | |
759 | spin_lock(&pprt_lock); | |
760 | bits.bl = on; | |
6136ac86 | 761 | panel_set_bits(); |
698b1515 | 762 | spin_unlock(&pprt_lock); |
7005b584 WT |
763 | } |
764 | ||
765 | /* send a command to the LCD panel in serial mode */ | |
698b1515 WT |
766 | static void lcd_write_cmd_s(int cmd) |
767 | { | |
768 | spin_lock(&pprt_lock); | |
769 | lcd_send_serial(0x1F); /* R/W=W, RS=0 */ | |
770 | lcd_send_serial(cmd & 0x0F); | |
771 | lcd_send_serial((cmd >> 4) & 0x0F); | |
772 | udelay(40); /* the shortest command takes at least 40 us */ | |
773 | spin_unlock(&pprt_lock); | |
7005b584 WT |
774 | } |
775 | ||
776 | /* send data to the LCD panel in serial mode */ | |
698b1515 WT |
777 | static void lcd_write_data_s(int data) |
778 | { | |
779 | spin_lock(&pprt_lock); | |
780 | lcd_send_serial(0x5F); /* R/W=W, RS=1 */ | |
781 | lcd_send_serial(data & 0x0F); | |
782 | lcd_send_serial((data >> 4) & 0x0F); | |
783 | udelay(40); /* the shortest data takes at least 40 us */ | |
784 | spin_unlock(&pprt_lock); | |
7005b584 WT |
785 | } |
786 | ||
787 | /* send a command to the LCD panel in 8 bits parallel mode */ | |
698b1515 WT |
788 | static void lcd_write_cmd_p8(int cmd) |
789 | { | |
790 | spin_lock(&pprt_lock); | |
791 | /* present the data to the data port */ | |
792 | w_dtr(pprt, cmd); | |
429ccf05 | 793 | udelay(20); /* maintain the data during 20 us before the strobe */ |
7005b584 | 794 | |
698b1515 WT |
795 | bits.e = BIT_SET; |
796 | bits.rs = BIT_CLR; | |
797 | bits.rw = BIT_CLR; | |
798 | set_ctrl_bits(); | |
7005b584 | 799 | |
429ccf05 | 800 | udelay(40); /* maintain the strobe during 40 us */ |
7005b584 | 801 | |
698b1515 WT |
802 | bits.e = BIT_CLR; |
803 | set_ctrl_bits(); | |
7005b584 | 804 | |
429ccf05 | 805 | udelay(120); /* the shortest command takes at least 120 us */ |
698b1515 | 806 | spin_unlock(&pprt_lock); |
7005b584 WT |
807 | } |
808 | ||
809 | /* send data to the LCD panel in 8 bits parallel mode */ | |
698b1515 WT |
810 | static void lcd_write_data_p8(int data) |
811 | { | |
812 | spin_lock(&pprt_lock); | |
813 | /* present the data to the data port */ | |
814 | w_dtr(pprt, data); | |
429ccf05 | 815 | udelay(20); /* maintain the data during 20 us before the strobe */ |
7005b584 | 816 | |
698b1515 WT |
817 | bits.e = BIT_SET; |
818 | bits.rs = BIT_SET; | |
819 | bits.rw = BIT_CLR; | |
820 | set_ctrl_bits(); | |
7005b584 | 821 | |
429ccf05 | 822 | udelay(40); /* maintain the strobe during 40 us */ |
7005b584 | 823 | |
698b1515 WT |
824 | bits.e = BIT_CLR; |
825 | set_ctrl_bits(); | |
7005b584 | 826 | |
429ccf05 | 827 | udelay(45); /* the shortest data takes at least 45 us */ |
698b1515 | 828 | spin_unlock(&pprt_lock); |
7005b584 WT |
829 | } |
830 | ||
77943d31 SR |
831 | /* send a command to the TI LCD panel */ |
832 | static void lcd_write_cmd_tilcd(int cmd) | |
833 | { | |
834 | spin_lock(&pprt_lock); | |
835 | /* present the data to the control port */ | |
836 | w_ctr(pprt, cmd); | |
837 | udelay(60); | |
838 | spin_unlock(&pprt_lock); | |
839 | } | |
840 | ||
841 | /* send data to the TI LCD panel */ | |
842 | static void lcd_write_data_tilcd(int data) | |
843 | { | |
844 | spin_lock(&pprt_lock); | |
845 | /* present the data to the data port */ | |
846 | w_dtr(pprt, data); | |
847 | udelay(60); | |
848 | spin_unlock(&pprt_lock); | |
849 | } | |
850 | ||
698b1515 WT |
851 | static void lcd_gotoxy(void) |
852 | { | |
853 | lcd_write_cmd(0x80 /* set DDRAM address */ | |
854 | | (lcd_addr_y ? lcd_hwidth : 0) | |
429ccf05 HH |
855 | /* we force the cursor to stay at the end of the |
856 | line if it wants to go farther */ | |
698b1515 WT |
857 | | ((lcd_addr_x < lcd_bwidth) ? lcd_addr_x & |
858 | (lcd_hwidth - 1) : lcd_bwidth - 1)); | |
7005b584 WT |
859 | } |
860 | ||
698b1515 WT |
861 | static void lcd_print(char c) |
862 | { | |
863 | if (lcd_addr_x < lcd_bwidth) { | |
864 | if (lcd_char_conv != NULL) | |
865 | c = lcd_char_conv[(unsigned char)c]; | |
866 | lcd_write_data(c); | |
867 | lcd_addr_x++; | |
868 | } | |
869 | /* prevents the cursor from wrapping onto the next line */ | |
870 | if (lcd_addr_x == lcd_bwidth) | |
871 | lcd_gotoxy(); | |
7005b584 WT |
872 | } |
873 | ||
874 | /* fills the display with spaces and resets X/Y */ | |
698b1515 WT |
875 | static void lcd_clear_fast_s(void) |
876 | { | |
877 | int pos; | |
878 | lcd_addr_x = lcd_addr_y = 0; | |
879 | lcd_gotoxy(); | |
880 | ||
881 | spin_lock(&pprt_lock); | |
882 | for (pos = 0; pos < lcd_height * lcd_hwidth; pos++) { | |
883 | lcd_send_serial(0x5F); /* R/W=W, RS=1 */ | |
884 | lcd_send_serial(' ' & 0x0F); | |
885 | lcd_send_serial((' ' >> 4) & 0x0F); | |
886 | udelay(40); /* the shortest data takes at least 40 us */ | |
887 | } | |
888 | spin_unlock(&pprt_lock); | |
889 | ||
890 | lcd_addr_x = lcd_addr_y = 0; | |
891 | lcd_gotoxy(); | |
7005b584 WT |
892 | } |
893 | ||
894 | /* fills the display with spaces and resets X/Y */ | |
698b1515 WT |
895 | static void lcd_clear_fast_p8(void) |
896 | { | |
897 | int pos; | |
898 | lcd_addr_x = lcd_addr_y = 0; | |
899 | lcd_gotoxy(); | |
7005b584 | 900 | |
698b1515 WT |
901 | spin_lock(&pprt_lock); |
902 | for (pos = 0; pos < lcd_height * lcd_hwidth; pos++) { | |
903 | /* present the data to the data port */ | |
904 | w_dtr(pprt, ' '); | |
429ccf05 HH |
905 | |
906 | /* maintain the data during 20 us before the strobe */ | |
907 | udelay(20); | |
7005b584 | 908 | |
698b1515 WT |
909 | bits.e = BIT_SET; |
910 | bits.rs = BIT_SET; | |
911 | bits.rw = BIT_CLR; | |
912 | set_ctrl_bits(); | |
7005b584 | 913 | |
429ccf05 HH |
914 | /* maintain the strobe during 40 us */ |
915 | udelay(40); | |
7005b584 | 916 | |
698b1515 WT |
917 | bits.e = BIT_CLR; |
918 | set_ctrl_bits(); | |
7005b584 | 919 | |
429ccf05 HH |
920 | /* the shortest data takes at least 45 us */ |
921 | udelay(45); | |
698b1515 WT |
922 | } |
923 | spin_unlock(&pprt_lock); | |
7005b584 | 924 | |
698b1515 WT |
925 | lcd_addr_x = lcd_addr_y = 0; |
926 | lcd_gotoxy(); | |
7005b584 WT |
927 | } |
928 | ||
77943d31 SR |
929 | /* fills the display with spaces and resets X/Y */ |
930 | static void lcd_clear_fast_tilcd(void) | |
931 | { | |
932 | int pos; | |
933 | lcd_addr_x = lcd_addr_y = 0; | |
934 | lcd_gotoxy(); | |
935 | ||
936 | spin_lock(&pprt_lock); | |
937 | for (pos = 0; pos < lcd_height * lcd_hwidth; pos++) { | |
938 | /* present the data to the data port */ | |
939 | w_dtr(pprt, ' '); | |
940 | udelay(60); | |
941 | } | |
942 | ||
943 | spin_unlock(&pprt_lock); | |
944 | ||
945 | lcd_addr_x = lcd_addr_y = 0; | |
946 | lcd_gotoxy(); | |
947 | } | |
948 | ||
7005b584 | 949 | /* clears the display and resets X/Y */ |
698b1515 WT |
950 | static void lcd_clear_display(void) |
951 | { | |
952 | lcd_write_cmd(0x01); /* clear display */ | |
953 | lcd_addr_x = lcd_addr_y = 0; | |
954 | /* we must wait a few milliseconds (15) */ | |
955 | long_sleep(15); | |
7005b584 WT |
956 | } |
957 | ||
698b1515 WT |
958 | static void lcd_init_display(void) |
959 | { | |
7005b584 | 960 | |
698b1515 WT |
961 | lcd_flags = ((lcd_height > 1) ? LCD_FLAG_N : 0) |
962 | | LCD_FLAG_D | LCD_FLAG_C | LCD_FLAG_B; | |
7005b584 | 963 | |
698b1515 | 964 | long_sleep(20); /* wait 20 ms after power-up for the paranoid */ |
7005b584 | 965 | |
698b1515 WT |
966 | lcd_write_cmd(0x30); /* 8bits, 1 line, small fonts */ |
967 | long_sleep(10); | |
968 | lcd_write_cmd(0x30); /* 8bits, 1 line, small fonts */ | |
969 | long_sleep(10); | |
970 | lcd_write_cmd(0x30); /* 8bits, 1 line, small fonts */ | |
971 | long_sleep(10); | |
7005b584 | 972 | |
698b1515 WT |
973 | lcd_write_cmd(0x30 /* set font height and lines number */ |
974 | | ((lcd_flags & LCD_FLAG_F) ? 4 : 0) | |
975 | | ((lcd_flags & LCD_FLAG_N) ? 8 : 0) | |
976 | ); | |
977 | long_sleep(10); | |
7005b584 | 978 | |
698b1515 WT |
979 | lcd_write_cmd(0x08); /* display off, cursor off, blink off */ |
980 | long_sleep(10); | |
7005b584 | 981 | |
698b1515 WT |
982 | lcd_write_cmd(0x08 /* set display mode */ |
983 | | ((lcd_flags & LCD_FLAG_D) ? 4 : 0) | |
984 | | ((lcd_flags & LCD_FLAG_C) ? 2 : 0) | |
985 | | ((lcd_flags & LCD_FLAG_B) ? 1 : 0) | |
986 | ); | |
7005b584 | 987 | |
698b1515 | 988 | lcd_backlight((lcd_flags & LCD_FLAG_L) ? 1 : 0); |
7005b584 | 989 | |
698b1515 | 990 | long_sleep(10); |
7005b584 | 991 | |
429ccf05 HH |
992 | /* entry mode set : increment, cursor shifting */ |
993 | lcd_write_cmd(0x06); | |
7005b584 | 994 | |
698b1515 | 995 | lcd_clear_display(); |
7005b584 WT |
996 | } |
997 | ||
998 | /* | |
999 | * These are the file operation function for user access to /dev/lcd | |
1000 | * This function can also be called from inside the kernel, by | |
1001 | * setting file and ppos to NULL. | |
1002 | * | |
1003 | */ | |
1004 | ||
429ccf05 HH |
1005 | static inline int handle_lcd_special_code(void) |
1006 | { | |
1007 | /* LCD special codes */ | |
1008 | ||
1009 | int processed = 0; | |
1010 | ||
1011 | char *esc = lcd_escape + 2; | |
1012 | int oldflags = lcd_flags; | |
1013 | ||
1014 | /* check for display mode flags */ | |
1015 | switch (*esc) { | |
1016 | case 'D': /* Display ON */ | |
1017 | lcd_flags |= LCD_FLAG_D; | |
1018 | processed = 1; | |
1019 | break; | |
1020 | case 'd': /* Display OFF */ | |
1021 | lcd_flags &= ~LCD_FLAG_D; | |
1022 | processed = 1; | |
1023 | break; | |
1024 | case 'C': /* Cursor ON */ | |
1025 | lcd_flags |= LCD_FLAG_C; | |
1026 | processed = 1; | |
1027 | break; | |
1028 | case 'c': /* Cursor OFF */ | |
1029 | lcd_flags &= ~LCD_FLAG_C; | |
1030 | processed = 1; | |
1031 | break; | |
1032 | case 'B': /* Blink ON */ | |
1033 | lcd_flags |= LCD_FLAG_B; | |
1034 | processed = 1; | |
1035 | break; | |
1036 | case 'b': /* Blink OFF */ | |
1037 | lcd_flags &= ~LCD_FLAG_B; | |
1038 | processed = 1; | |
1039 | break; | |
1040 | case '+': /* Back light ON */ | |
1041 | lcd_flags |= LCD_FLAG_L; | |
1042 | processed = 1; | |
1043 | break; | |
1044 | case '-': /* Back light OFF */ | |
1045 | lcd_flags &= ~LCD_FLAG_L; | |
1046 | processed = 1; | |
1047 | break; | |
1048 | case '*': | |
1049 | /* flash back light using the keypad timer */ | |
1050 | if (scan_timer.function != NULL) { | |
1051 | if (light_tempo == 0 && ((lcd_flags & LCD_FLAG_L) == 0)) | |
1052 | lcd_backlight(1); | |
1053 | light_tempo = FLASH_LIGHT_TEMPO; | |
1054 | } | |
1055 | processed = 1; | |
1056 | break; | |
1057 | case 'f': /* Small Font */ | |
1058 | lcd_flags &= ~LCD_FLAG_F; | |
1059 | processed = 1; | |
1060 | break; | |
1061 | case 'F': /* Large Font */ | |
1062 | lcd_flags |= LCD_FLAG_F; | |
1063 | processed = 1; | |
1064 | break; | |
1065 | case 'n': /* One Line */ | |
1066 | lcd_flags &= ~LCD_FLAG_N; | |
1067 | processed = 1; | |
1068 | break; | |
1069 | case 'N': /* Two Lines */ | |
1070 | lcd_flags |= LCD_FLAG_N; | |
1071 | break; | |
1072 | case 'l': /* Shift Cursor Left */ | |
1073 | if (lcd_addr_x > 0) { | |
1074 | /* back one char if not at end of line */ | |
1075 | if (lcd_addr_x < lcd_bwidth) | |
1076 | lcd_write_cmd(0x10); | |
1077 | lcd_addr_x--; | |
1078 | } | |
1079 | processed = 1; | |
1080 | break; | |
1081 | case 'r': /* shift cursor right */ | |
1082 | if (lcd_addr_x < lcd_width) { | |
1083 | /* allow the cursor to pass the end of the line */ | |
1084 | if (lcd_addr_x < | |
1085 | (lcd_bwidth - 1)) | |
1086 | lcd_write_cmd(0x14); | |
1087 | lcd_addr_x++; | |
1088 | } | |
1089 | processed = 1; | |
1090 | break; | |
1091 | case 'L': /* shift display left */ | |
1092 | lcd_left_shift++; | |
1093 | lcd_write_cmd(0x18); | |
1094 | processed = 1; | |
1095 | break; | |
1096 | case 'R': /* shift display right */ | |
1097 | lcd_left_shift--; | |
1098 | lcd_write_cmd(0x1C); | |
1099 | processed = 1; | |
1100 | break; | |
1101 | case 'k': { /* kill end of line */ | |
1102 | int x; | |
1103 | for (x = lcd_addr_x; x < lcd_bwidth; x++) | |
1104 | lcd_write_data(' '); | |
1105 | ||
1106 | /* restore cursor position */ | |
1107 | lcd_gotoxy(); | |
1108 | processed = 1; | |
1109 | break; | |
1110 | } | |
1111 | case 'I': /* reinitialize display */ | |
1112 | lcd_init_display(); | |
1113 | lcd_left_shift = 0; | |
1114 | processed = 1; | |
1115 | break; | |
1116 | case 'G': { | |
1117 | /* Generator : LGcxxxxx...xx; must have <c> between '0' | |
1118 | * and '7', representing the numerical ASCII code of the | |
1119 | * redefined character, and <xx...xx> a sequence of 16 | |
1120 | * hex digits representing 8 bytes for each character. | |
1121 | * Most LCDs will only use 5 lower bits of the 7 first | |
1122 | * bytes. | |
1123 | */ | |
1124 | ||
1125 | unsigned char cgbytes[8]; | |
1126 | unsigned char cgaddr; | |
1127 | int cgoffset; | |
1128 | int shift; | |
1129 | char value; | |
1130 | int addr; | |
1131 | ||
1132 | if (strchr(esc, ';') == NULL) | |
1133 | break; | |
1134 | ||
1135 | esc++; | |
1136 | ||
1137 | cgaddr = *(esc++) - '0'; | |
1138 | if (cgaddr > 7) { | |
1139 | processed = 1; | |
1140 | break; | |
1141 | } | |
1142 | ||
1143 | cgoffset = 0; | |
1144 | shift = 0; | |
1145 | value = 0; | |
1146 | while (*esc && cgoffset < 8) { | |
1147 | shift ^= 4; | |
1148 | if (*esc >= '0' && *esc <= '9') | |
1149 | value |= (*esc - '0') << shift; | |
1150 | else if (*esc >= 'A' && *esc <= 'Z') | |
1151 | value |= (*esc - 'A' + 10) << shift; | |
1152 | else if (*esc >= 'a' && *esc <= 'z') | |
1153 | value |= (*esc - 'a' + 10) << shift; | |
1154 | else { | |
1155 | esc++; | |
1156 | continue; | |
1157 | } | |
1158 | ||
1159 | if (shift == 0) { | |
1160 | cgbytes[cgoffset++] = value; | |
1161 | value = 0; | |
1162 | } | |
1163 | ||
1164 | esc++; | |
1165 | } | |
1166 | ||
1167 | lcd_write_cmd(0x40 | (cgaddr * 8)); | |
1168 | for (addr = 0; addr < cgoffset; addr++) | |
1169 | lcd_write_data(cgbytes[addr]); | |
1170 | ||
1171 | /* ensures that we stop writing to CGRAM */ | |
1172 | lcd_gotoxy(); | |
1173 | processed = 1; | |
1174 | break; | |
1175 | } | |
1176 | case 'x': /* gotoxy : LxXXX[yYYY]; */ | |
1177 | case 'y': /* gotoxy : LyYYY[xXXX]; */ | |
1178 | if (strchr(esc, ';') == NULL) | |
1179 | break; | |
1180 | ||
1181 | while (*esc) { | |
1182 | if (*esc == 'x') { | |
1183 | esc++; | |
1184 | lcd_addr_x = 0; | |
1185 | while (isdigit(*esc)) { | |
1186 | lcd_addr_x = lcd_addr_x * 10 + | |
1187 | (*esc - '0'); | |
1188 | esc++; | |
1189 | } | |
1190 | } else if (*esc == 'y') { | |
1191 | esc++; | |
1192 | lcd_addr_y = 0; | |
1193 | while (isdigit(*esc)) { | |
1194 | lcd_addr_y = lcd_addr_y * 10 + | |
1195 | (*esc - '0'); | |
1196 | esc++; | |
1197 | } | |
1198 | } else | |
1199 | break; | |
1200 | } | |
1201 | ||
1202 | lcd_gotoxy(); | |
1203 | processed = 1; | |
1204 | break; | |
1205 | } | |
1206 | ||
1207 | /* Check wether one flag was changed */ | |
1208 | if (oldflags != lcd_flags) { | |
1209 | /* check whether one of B,C,D flags were changed */ | |
1210 | if ((oldflags ^ lcd_flags) & | |
1211 | (LCD_FLAG_B | LCD_FLAG_C | LCD_FLAG_D)) | |
1212 | /* set display mode */ | |
1213 | lcd_write_cmd(0x08 | |
1214 | | ((lcd_flags & LCD_FLAG_D) ? 4 : 0) | |
1215 | | ((lcd_flags & LCD_FLAG_C) ? 2 : 0) | |
1216 | | ((lcd_flags & LCD_FLAG_B) ? 1 : 0)); | |
1217 | /* check whether one of F,N flags was changed */ | |
1218 | else if ((oldflags ^ lcd_flags) & (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) & (LCD_FLAG_L)) { | |
1224 | if (lcd_flags & (LCD_FLAG_L)) | |
1225 | lcd_backlight(1); | |
1226 | else if (light_tempo == 0) | |
1227 | /* switch off the light only when the tempo | |
1228 | lighting is gone */ | |
1229 | lcd_backlight(0); | |
1230 | } | |
1231 | } | |
1232 | ||
1233 | return processed; | |
1234 | } | |
1235 | ||
698b1515 WT |
1236 | static ssize_t lcd_write(struct file *file, |
1237 | const char *buf, size_t count, loff_t *ppos) | |
1238 | { | |
698b1515 WT |
1239 | const char *tmp = buf; |
1240 | char c; | |
1241 | ||
1242 | for (; count-- > 0; (ppos ? (*ppos)++ : 0), ++tmp) { | |
1243 | if (!in_interrupt() && (((count + 1) & 0x1f) == 0)) | |
429ccf05 HH |
1244 | /* let's be a little nice with other processes |
1245 | that need some CPU */ | |
1246 | schedule(); | |
698b1515 WT |
1247 | |
1248 | if (ppos == NULL && file == NULL) | |
429ccf05 HH |
1249 | /* let's not use get_user() from the kernel ! */ |
1250 | c = *tmp; | |
698b1515 WT |
1251 | else if (get_user(c, tmp)) |
1252 | return -EFAULT; | |
1253 | ||
1254 | /* first, we'll test if we're in escape mode */ | |
429ccf05 HH |
1255 | if ((c != '\n') && lcd_escape_len >= 0) { |
1256 | /* yes, let's add this char to the buffer */ | |
698b1515 WT |
1257 | lcd_escape[lcd_escape_len++] = c; |
1258 | lcd_escape[lcd_escape_len] = 0; | |
1259 | } else { | |
429ccf05 HH |
1260 | /* aborts any previous escape sequence */ |
1261 | lcd_escape_len = -1; | |
698b1515 WT |
1262 | |
1263 | switch (c) { | |
429ccf05 HH |
1264 | case LCD_ESCAPE_CHAR: |
1265 | /* start of an escape sequence */ | |
698b1515 WT |
1266 | lcd_escape_len = 0; |
1267 | lcd_escape[lcd_escape_len] = 0; | |
1268 | break; | |
429ccf05 HH |
1269 | case '\b': |
1270 | /* go back one char and clear it */ | |
698b1515 | 1271 | if (lcd_addr_x > 0) { |
429ccf05 HH |
1272 | /* check if we're not at the |
1273 | end of the line */ | |
1274 | if (lcd_addr_x < lcd_bwidth) | |
1275 | /* back one char */ | |
1276 | lcd_write_cmd(0x10); | |
698b1515 WT |
1277 | lcd_addr_x--; |
1278 | } | |
429ccf05 HH |
1279 | /* replace with a space */ |
1280 | lcd_write_data(' '); | |
1281 | /* back one char again */ | |
1282 | lcd_write_cmd(0x10); | |
698b1515 | 1283 | break; |
429ccf05 HH |
1284 | case '\014': |
1285 | /* quickly clear the display */ | |
698b1515 WT |
1286 | lcd_clear_fast(); |
1287 | break; | |
429ccf05 HH |
1288 | case '\n': |
1289 | /* flush the remainder of the current line and | |
1290 | go to the beginning of the next line */ | |
698b1515 WT |
1291 | for (; lcd_addr_x < lcd_bwidth; lcd_addr_x++) |
1292 | lcd_write_data(' '); | |
1293 | lcd_addr_x = 0; | |
1294 | lcd_addr_y = (lcd_addr_y + 1) % lcd_height; | |
1295 | lcd_gotoxy(); | |
1296 | break; | |
429ccf05 HH |
1297 | case '\r': |
1298 | /* go to the beginning of the same line */ | |
698b1515 WT |
1299 | lcd_addr_x = 0; |
1300 | lcd_gotoxy(); | |
1301 | break; | |
429ccf05 HH |
1302 | case '\t': |
1303 | /* print a space instead of the tab */ | |
698b1515 WT |
1304 | lcd_print(' '); |
1305 | break; | |
429ccf05 HH |
1306 | default: |
1307 | /* simply print this char */ | |
698b1515 WT |
1308 | lcd_print(c); |
1309 | break; | |
7005b584 | 1310 | } |
7005b584 | 1311 | } |
7005b584 | 1312 | |
698b1515 | 1313 | /* now we'll see if we're in an escape mode and if the current |
429ccf05 HH |
1314 | escape sequence can be understood. */ |
1315 | if (lcd_escape_len >= 2) { | |
1316 | int processed = 0; | |
698b1515 | 1317 | |
429ccf05 HH |
1318 | if (!strcmp(lcd_escape, "[2J")) { |
1319 | /* clear the display */ | |
1320 | lcd_clear_fast(); | |
698b1515 | 1321 | processed = 1; |
429ccf05 HH |
1322 | } else if (!strcmp(lcd_escape, "[H")) { |
1323 | /* cursor to home */ | |
698b1515 WT |
1324 | lcd_addr_x = lcd_addr_y = 0; |
1325 | lcd_gotoxy(); | |
1326 | processed = 1; | |
7005b584 | 1327 | } |
698b1515 WT |
1328 | /* codes starting with ^[[L */ |
1329 | else if ((lcd_escape_len >= 3) && | |
429ccf05 HH |
1330 | (lcd_escape[0] == '[') && |
1331 | (lcd_escape[1] == 'L')) { | |
1332 | processed = handle_lcd_special_code(); | |
7005b584 | 1333 | } |
7005b584 | 1334 | |
698b1515 | 1335 | /* LCD special escape codes */ |
429ccf05 HH |
1336 | /* flush the escape sequence if it's been processed |
1337 | or if it is getting too long. */ | |
698b1515 WT |
1338 | if (processed || (lcd_escape_len >= LCD_ESCAPE_LEN)) |
1339 | lcd_escape_len = -1; | |
429ccf05 | 1340 | } /* escape codes */ |
698b1515 | 1341 | } |
7005b584 | 1342 | |
698b1515 | 1343 | return tmp - buf; |
7005b584 WT |
1344 | } |
1345 | ||
698b1515 WT |
1346 | static int lcd_open(struct inode *inode, struct file *file) |
1347 | { | |
1348 | if (lcd_open_cnt) | |
1349 | return -EBUSY; /* open only once at a time */ | |
7005b584 | 1350 | |
698b1515 WT |
1351 | if (file->f_mode & FMODE_READ) /* device is write-only */ |
1352 | return -EPERM; | |
7005b584 | 1353 | |
698b1515 WT |
1354 | if (lcd_must_clear) { |
1355 | lcd_clear_display(); | |
1356 | lcd_must_clear = 0; | |
1357 | } | |
1358 | lcd_open_cnt++; | |
1359 | return 0; | |
7005b584 WT |
1360 | } |
1361 | ||
698b1515 WT |
1362 | static int lcd_release(struct inode *inode, struct file *file) |
1363 | { | |
1364 | lcd_open_cnt--; | |
1365 | return 0; | |
7005b584 WT |
1366 | } |
1367 | ||
429ccf05 | 1368 | static const struct file_operations lcd_fops = { |
698b1515 WT |
1369 | .write = lcd_write, |
1370 | .open = lcd_open, | |
1371 | .release = lcd_release, | |
7005b584 WT |
1372 | }; |
1373 | ||
1374 | static struct miscdevice lcd_dev = { | |
698b1515 WT |
1375 | LCD_MINOR, |
1376 | "lcd", | |
1377 | &lcd_fops | |
7005b584 WT |
1378 | }; |
1379 | ||
7005b584 | 1380 | /* public function usable from the kernel for any purpose */ |
698b1515 WT |
1381 | void panel_lcd_print(char *s) |
1382 | { | |
1383 | if (lcd_enabled && lcd_initialized) | |
1384 | lcd_write(NULL, s, strlen(s), NULL); | |
7005b584 WT |
1385 | } |
1386 | ||
7005b584 | 1387 | /* initialize the LCD driver */ |
698b1515 WT |
1388 | void lcd_init(void) |
1389 | { | |
1390 | switch (lcd_type) { | |
429ccf05 HH |
1391 | case LCD_TYPE_OLD: |
1392 | /* parallel mode, 8 bits */ | |
698b1515 WT |
1393 | if (lcd_proto < 0) |
1394 | lcd_proto = LCD_PROTO_PARALLEL; | |
1395 | if (lcd_charset < 0) | |
1396 | lcd_charset = LCD_CHARSET_NORMAL; | |
1397 | if (lcd_e_pin == PIN_NOT_SET) | |
1398 | lcd_e_pin = PIN_STROBE; | |
1399 | if (lcd_rs_pin == PIN_NOT_SET) | |
1400 | lcd_rs_pin = PIN_AUTOLF; | |
1401 | ||
1402 | if (lcd_width < 0) | |
1403 | lcd_width = 40; | |
1404 | if (lcd_bwidth < 0) | |
1405 | lcd_bwidth = 40; | |
1406 | if (lcd_hwidth < 0) | |
1407 | lcd_hwidth = 64; | |
1408 | if (lcd_height < 0) | |
1409 | lcd_height = 2; | |
7005b584 | 1410 | break; |
429ccf05 HH |
1411 | case LCD_TYPE_KS0074: |
1412 | /* serial mode, ks0074 */ | |
698b1515 WT |
1413 | if (lcd_proto < 0) |
1414 | lcd_proto = LCD_PROTO_SERIAL; | |
1415 | if (lcd_charset < 0) | |
1416 | lcd_charset = LCD_CHARSET_KS0074; | |
1417 | if (lcd_bl_pin == PIN_NOT_SET) | |
1418 | lcd_bl_pin = PIN_AUTOLF; | |
1419 | if (lcd_cl_pin == PIN_NOT_SET) | |
1420 | lcd_cl_pin = PIN_STROBE; | |
1421 | if (lcd_da_pin == PIN_NOT_SET) | |
1422 | lcd_da_pin = PIN_D0; | |
1423 | ||
1424 | if (lcd_width < 0) | |
1425 | lcd_width = 16; | |
1426 | if (lcd_bwidth < 0) | |
1427 | lcd_bwidth = 40; | |
1428 | if (lcd_hwidth < 0) | |
1429 | lcd_hwidth = 16; | |
1430 | if (lcd_height < 0) | |
1431 | lcd_height = 2; | |
7005b584 | 1432 | break; |
429ccf05 HH |
1433 | case LCD_TYPE_NEXCOM: |
1434 | /* parallel mode, 8 bits, generic */ | |
698b1515 WT |
1435 | if (lcd_proto < 0) |
1436 | lcd_proto = LCD_PROTO_PARALLEL; | |
1437 | if (lcd_charset < 0) | |
1438 | lcd_charset = LCD_CHARSET_NORMAL; | |
1439 | if (lcd_e_pin == PIN_NOT_SET) | |
1440 | lcd_e_pin = PIN_AUTOLF; | |
1441 | if (lcd_rs_pin == PIN_NOT_SET) | |
1442 | lcd_rs_pin = PIN_SELECP; | |
1443 | if (lcd_rw_pin == PIN_NOT_SET) | |
1444 | lcd_rw_pin = PIN_INITP; | |
1445 | ||
1446 | if (lcd_width < 0) | |
1447 | lcd_width = 16; | |
1448 | if (lcd_bwidth < 0) | |
1449 | lcd_bwidth = 40; | |
1450 | if (lcd_hwidth < 0) | |
1451 | lcd_hwidth = 64; | |
1452 | if (lcd_height < 0) | |
1453 | lcd_height = 2; | |
7005b584 | 1454 | break; |
429ccf05 HH |
1455 | case LCD_TYPE_CUSTOM: |
1456 | /* customer-defined */ | |
698b1515 WT |
1457 | if (lcd_proto < 0) |
1458 | lcd_proto = DEFAULT_LCD_PROTO; | |
1459 | if (lcd_charset < 0) | |
1460 | lcd_charset = DEFAULT_LCD_CHARSET; | |
7005b584 WT |
1461 | /* default geometry will be set later */ |
1462 | break; | |
429ccf05 HH |
1463 | case LCD_TYPE_HANTRONIX: |
1464 | /* parallel mode, 8 bits, hantronix-like */ | |
698b1515 WT |
1465 | default: |
1466 | if (lcd_proto < 0) | |
1467 | lcd_proto = LCD_PROTO_PARALLEL; | |
1468 | if (lcd_charset < 0) | |
1469 | lcd_charset = LCD_CHARSET_NORMAL; | |
1470 | if (lcd_e_pin == PIN_NOT_SET) | |
1471 | lcd_e_pin = PIN_STROBE; | |
1472 | if (lcd_rs_pin == PIN_NOT_SET) | |
1473 | lcd_rs_pin = PIN_SELECP; | |
1474 | ||
1475 | if (lcd_width < 0) | |
1476 | lcd_width = 16; | |
1477 | if (lcd_bwidth < 0) | |
1478 | lcd_bwidth = 40; | |
1479 | if (lcd_hwidth < 0) | |
1480 | lcd_hwidth = 64; | |
1481 | if (lcd_height < 0) | |
1482 | lcd_height = 2; | |
7005b584 | 1483 | break; |
698b1515 | 1484 | } |
7005b584 | 1485 | |
698b1515 WT |
1486 | /* this is used to catch wrong and default values */ |
1487 | if (lcd_width <= 0) | |
1488 | lcd_width = DEFAULT_LCD_WIDTH; | |
1489 | if (lcd_bwidth <= 0) | |
1490 | lcd_bwidth = DEFAULT_LCD_BWIDTH; | |
1491 | if (lcd_hwidth <= 0) | |
1492 | lcd_hwidth = DEFAULT_LCD_HWIDTH; | |
1493 | if (lcd_height <= 0) | |
1494 | lcd_height = DEFAULT_LCD_HEIGHT; | |
1495 | ||
1496 | if (lcd_proto == LCD_PROTO_SERIAL) { /* SERIAL */ | |
1497 | lcd_write_cmd = lcd_write_cmd_s; | |
1498 | lcd_write_data = lcd_write_data_s; | |
1499 | lcd_clear_fast = lcd_clear_fast_s; | |
1500 | ||
1501 | if (lcd_cl_pin == PIN_NOT_SET) | |
1502 | lcd_cl_pin = DEFAULT_LCD_PIN_SCL; | |
1503 | if (lcd_da_pin == PIN_NOT_SET) | |
1504 | lcd_da_pin = DEFAULT_LCD_PIN_SDA; | |
1505 | ||
77943d31 | 1506 | } else if (lcd_proto == LCD_PROTO_PARALLEL) { /* PARALLEL */ |
698b1515 WT |
1507 | lcd_write_cmd = lcd_write_cmd_p8; |
1508 | lcd_write_data = lcd_write_data_p8; | |
1509 | lcd_clear_fast = lcd_clear_fast_p8; | |
1510 | ||
1511 | if (lcd_e_pin == PIN_NOT_SET) | |
1512 | lcd_e_pin = DEFAULT_LCD_PIN_E; | |
1513 | if (lcd_rs_pin == PIN_NOT_SET) | |
1514 | lcd_rs_pin = DEFAULT_LCD_PIN_RS; | |
1515 | if (lcd_rw_pin == PIN_NOT_SET) | |
1516 | lcd_rw_pin = DEFAULT_LCD_PIN_RW; | |
77943d31 SR |
1517 | } else { |
1518 | lcd_write_cmd = lcd_write_cmd_tilcd; | |
1519 | lcd_write_data = lcd_write_data_tilcd; | |
1520 | lcd_clear_fast = lcd_clear_fast_tilcd; | |
698b1515 | 1521 | } |
7005b584 | 1522 | |
698b1515 WT |
1523 | if (lcd_bl_pin == PIN_NOT_SET) |
1524 | lcd_bl_pin = DEFAULT_LCD_PIN_BL; | |
7005b584 | 1525 | |
698b1515 WT |
1526 | if (lcd_e_pin == PIN_NOT_SET) |
1527 | lcd_e_pin = PIN_NONE; | |
7005b584 | 1528 | if (lcd_rs_pin == PIN_NOT_SET) |
698b1515 | 1529 | lcd_rs_pin = PIN_NONE; |
7005b584 | 1530 | if (lcd_rw_pin == PIN_NOT_SET) |
698b1515 WT |
1531 | lcd_rw_pin = PIN_NONE; |
1532 | if (lcd_bl_pin == PIN_NOT_SET) | |
1533 | lcd_bl_pin = PIN_NONE; | |
1534 | if (lcd_cl_pin == PIN_NOT_SET) | |
1535 | lcd_cl_pin = PIN_NONE; | |
1536 | if (lcd_da_pin == PIN_NOT_SET) | |
1537 | lcd_da_pin = PIN_NONE; | |
7005b584 | 1538 | |
698b1515 WT |
1539 | if (lcd_charset < 0) |
1540 | lcd_charset = DEFAULT_LCD_CHARSET; | |
7005b584 | 1541 | |
698b1515 WT |
1542 | if (lcd_charset == LCD_CHARSET_KS0074) |
1543 | lcd_char_conv = lcd_char_conv_ks0074; | |
1544 | else | |
1545 | lcd_char_conv = NULL; | |
1546 | ||
1547 | if (lcd_bl_pin != PIN_NONE) | |
1548 | init_scan_timer(); | |
1549 | ||
1550 | pin_to_bits(lcd_e_pin, lcd_bits[LCD_PORT_D][LCD_BIT_E], | |
1551 | lcd_bits[LCD_PORT_C][LCD_BIT_E]); | |
1552 | pin_to_bits(lcd_rs_pin, lcd_bits[LCD_PORT_D][LCD_BIT_RS], | |
1553 | lcd_bits[LCD_PORT_C][LCD_BIT_RS]); | |
1554 | pin_to_bits(lcd_rw_pin, lcd_bits[LCD_PORT_D][LCD_BIT_RW], | |
1555 | lcd_bits[LCD_PORT_C][LCD_BIT_RW]); | |
1556 | pin_to_bits(lcd_bl_pin, lcd_bits[LCD_PORT_D][LCD_BIT_BL], | |
1557 | lcd_bits[LCD_PORT_C][LCD_BIT_BL]); | |
1558 | pin_to_bits(lcd_cl_pin, lcd_bits[LCD_PORT_D][LCD_BIT_CL], | |
1559 | lcd_bits[LCD_PORT_C][LCD_BIT_CL]); | |
1560 | pin_to_bits(lcd_da_pin, lcd_bits[LCD_PORT_D][LCD_BIT_DA], | |
1561 | lcd_bits[LCD_PORT_C][LCD_BIT_DA]); | |
1562 | ||
1563 | /* before this line, we must NOT send anything to the display. | |
1564 | * Since lcd_init_display() needs to write data, we have to | |
429ccf05 | 1565 | * enable mark the LCD initialized just before. */ |
698b1515 WT |
1566 | lcd_initialized = 1; |
1567 | lcd_init_display(); | |
7005b584 | 1568 | |
698b1515 | 1569 | /* display a short message */ |
7005b584 WT |
1570 | #ifdef CONFIG_PANEL_CHANGE_MESSAGE |
1571 | #ifdef CONFIG_PANEL_BOOT_MESSAGE | |
698b1515 | 1572 | panel_lcd_print("\x1b[Lc\x1b[Lb\x1b[L*" CONFIG_PANEL_BOOT_MESSAGE); |
7005b584 WT |
1573 | #endif |
1574 | #else | |
698b1515 WT |
1575 | panel_lcd_print("\x1b[Lc\x1b[Lb\x1b[L*Linux-" UTS_RELEASE "\nPanel-" |
1576 | PANEL_VERSION); | |
7005b584 | 1577 | #endif |
698b1515 | 1578 | lcd_addr_x = lcd_addr_y = 0; |
429ccf05 HH |
1579 | /* clear the display on the next device opening */ |
1580 | lcd_must_clear = 1; | |
698b1515 | 1581 | lcd_gotoxy(); |
7005b584 WT |
1582 | } |
1583 | ||
7005b584 WT |
1584 | /* |
1585 | * These are the file operation function for user access to /dev/keypad | |
1586 | */ | |
1587 | ||
698b1515 WT |
1588 | static ssize_t keypad_read(struct file *file, |
1589 | char *buf, size_t count, loff_t *ppos) | |
1590 | { | |
7005b584 | 1591 | |
698b1515 WT |
1592 | unsigned i = *ppos; |
1593 | char *tmp = buf; | |
7005b584 | 1594 | |
698b1515 WT |
1595 | if (keypad_buflen == 0) { |
1596 | if (file->f_flags & O_NONBLOCK) | |
1597 | return -EAGAIN; | |
7005b584 | 1598 | |
698b1515 WT |
1599 | interruptible_sleep_on(&keypad_read_wait); |
1600 | if (signal_pending(current)) | |
1601 | return -EINTR; | |
1602 | } | |
7005b584 | 1603 | |
429ccf05 HH |
1604 | for (; count-- > 0 && (keypad_buflen > 0); |
1605 | ++i, ++tmp, --keypad_buflen) { | |
698b1515 WT |
1606 | put_user(keypad_buffer[keypad_start], tmp); |
1607 | keypad_start = (keypad_start + 1) % KEYPAD_BUFFER; | |
1608 | } | |
1609 | *ppos = i; | |
7005b584 | 1610 | |
698b1515 | 1611 | return tmp - buf; |
7005b584 WT |
1612 | } |
1613 | ||
698b1515 WT |
1614 | static int keypad_open(struct inode *inode, struct file *file) |
1615 | { | |
7005b584 | 1616 | |
698b1515 WT |
1617 | if (keypad_open_cnt) |
1618 | return -EBUSY; /* open only once at a time */ | |
7005b584 | 1619 | |
698b1515 WT |
1620 | if (file->f_mode & FMODE_WRITE) /* device is read-only */ |
1621 | return -EPERM; | |
7005b584 | 1622 | |
698b1515 WT |
1623 | keypad_buflen = 0; /* flush the buffer on opening */ |
1624 | keypad_open_cnt++; | |
1625 | return 0; | |
7005b584 WT |
1626 | } |
1627 | ||
698b1515 WT |
1628 | static int keypad_release(struct inode *inode, struct file *file) |
1629 | { | |
1630 | keypad_open_cnt--; | |
1631 | return 0; | |
7005b584 WT |
1632 | } |
1633 | ||
429ccf05 | 1634 | static const struct file_operations keypad_fops = { |
698b1515 WT |
1635 | .read = keypad_read, /* read */ |
1636 | .open = keypad_open, /* open */ | |
1637 | .release = keypad_release, /* close */ | |
7005b584 WT |
1638 | }; |
1639 | ||
1640 | static struct miscdevice keypad_dev = { | |
698b1515 WT |
1641 | KEYPAD_MINOR, |
1642 | "keypad", | |
1643 | &keypad_fops | |
7005b584 WT |
1644 | }; |
1645 | ||
698b1515 WT |
1646 | static void keypad_send_key(char *string, int max_len) |
1647 | { | |
1648 | if (init_in_progress) | |
1649 | return; | |
1650 | ||
1651 | /* send the key to the device only if a process is attached to it. */ | |
1652 | if (keypad_open_cnt > 0) { | |
1653 | while (max_len-- && keypad_buflen < KEYPAD_BUFFER && *string) { | |
1654 | keypad_buffer[(keypad_start + keypad_buflen++) % | |
1655 | KEYPAD_BUFFER] = *string++; | |
1656 | } | |
1657 | wake_up_interruptible(&keypad_read_wait); | |
7005b584 | 1658 | } |
7005b584 WT |
1659 | } |
1660 | ||
429ccf05 HH |
1661 | /* this function scans all the bits involving at least one logical signal, |
1662 | * and puts the results in the bitfield "phys_read" (one bit per established | |
1663 | * contact), and sets "phys_read_prev" to "phys_read". | |
7005b584 | 1664 | * |
429ccf05 HH |
1665 | * Note: to debounce input signals, we will only consider as switched a signal |
1666 | * which is stable across 2 measures. Signals which are different between two | |
1667 | * reads will be kept as they previously were in their logical form (phys_prev). | |
1668 | * A signal which has just switched will have a 1 in | |
1669 | * (phys_read ^ phys_read_prev). | |
7005b584 | 1670 | */ |
698b1515 WT |
1671 | static void phys_scan_contacts(void) |
1672 | { | |
1673 | int bit, bitval; | |
1674 | char oldval; | |
1675 | char bitmask; | |
1676 | char gndmask; | |
1677 | ||
1678 | phys_prev = phys_curr; | |
1679 | phys_read_prev = phys_read; | |
1680 | phys_read = 0; /* flush all signals */ | |
1681 | ||
429ccf05 HH |
1682 | /* keep track of old value, with all outputs disabled */ |
1683 | oldval = r_dtr(pprt) | scan_mask_o; | |
1684 | /* activate all keyboard outputs (active low) */ | |
1685 | w_dtr(pprt, oldval & ~scan_mask_o); | |
1686 | ||
1687 | /* will have a 1 for each bit set to gnd */ | |
1688 | bitmask = PNL_PINPUT(r_str(pprt)) & scan_mask_i; | |
1689 | /* disable all matrix signals */ | |
1690 | w_dtr(pprt, oldval); | |
698b1515 WT |
1691 | |
1692 | /* now that all outputs are cleared, the only active input bits are | |
1693 | * directly connected to the ground | |
7005b584 | 1694 | */ |
698b1515 | 1695 | |
429ccf05 HH |
1696 | /* 1 for each grounded input */ |
1697 | gndmask = PNL_PINPUT(r_str(pprt)) & scan_mask_i; | |
1698 | ||
1699 | /* grounded inputs are signals 40-44 */ | |
1700 | phys_read |= (pmask_t) gndmask << 40; | |
7005b584 | 1701 | |
698b1515 | 1702 | if (bitmask != gndmask) { |
429ccf05 HH |
1703 | /* since clearing the outputs changed some inputs, we know |
1704 | * that some input signals are currently tied to some outputs. | |
1705 | * So we'll scan them. | |
698b1515 WT |
1706 | */ |
1707 | for (bit = 0; bit < 8; bit++) { | |
1708 | bitval = 1 << bit; | |
7005b584 | 1709 | |
698b1515 WT |
1710 | if (!(scan_mask_o & bitval)) /* skip unused bits */ |
1711 | continue; | |
1712 | ||
1713 | w_dtr(pprt, oldval & ~bitval); /* enable this output */ | |
1714 | bitmask = PNL_PINPUT(r_str(pprt)) & ~gndmask; | |
1715 | phys_read |= (pmask_t) bitmask << (5 * bit); | |
1716 | } | |
1717 | w_dtr(pprt, oldval); /* disable all outputs */ | |
7005b584 | 1718 | } |
429ccf05 HH |
1719 | /* this is easy: use old bits when they are flapping, |
1720 | * use new ones when stable */ | |
1721 | phys_curr = (phys_prev & (phys_read ^ phys_read_prev)) | | |
1722 | (phys_read & ~(phys_read ^ phys_read_prev)); | |
1723 | } | |
1724 | ||
1725 | static inline int input_state_high(struct logical_input *input) | |
1726 | { | |
1727 | #if 0 | |
1728 | /* FIXME: | |
1729 | * this is an invalid test. It tries to catch | |
1730 | * transitions from single-key to multiple-key, but | |
1731 | * doesn't take into account the contacts polarity. | |
1732 | * The only solution to the problem is to parse keys | |
1733 | * from the most complex to the simplest combinations, | |
1734 | * and mark them as 'caught' once a combination | |
1735 | * matches, then unmatch it for all other ones. | |
1736 | */ | |
1737 | ||
1738 | /* try to catch dangerous transitions cases : | |
1739 | * someone adds a bit, so this signal was a false | |
1740 | * positive resulting from a transition. We should | |
1741 | * invalidate the signal immediately and not call the | |
1742 | * release function. | |
1743 | * eg: 0 -(press A)-> A -(press B)-> AB : don't match A's release. | |
1744 | */ | |
1745 | if (((phys_prev & input->mask) == input->value) | |
1746 | && ((phys_curr & input->mask) > input->value)) { | |
1747 | input->state = INPUT_ST_LOW; /* invalidate */ | |
1748 | return 1; | |
1749 | } | |
1750 | #endif | |
1751 | ||
1752 | if ((phys_curr & input->mask) == input->value) { | |
1753 | if ((input->type == INPUT_TYPE_STD) && | |
1754 | (input->high_timer == 0)) { | |
1755 | input->high_timer++; | |
1756 | if (input->u.std.press_fct != NULL) | |
1757 | input->u.std.press_fct(input->u.std.press_data); | |
1758 | } else if (input->type == INPUT_TYPE_KBD) { | |
1759 | /* will turn on the light */ | |
1760 | keypressed = 1; | |
1761 | ||
1762 | if (input->high_timer == 0) { | |
1763 | char *press_str = input->u.kbd.press_str; | |
1764 | if (press_str[0]) | |
1765 | keypad_send_key(press_str, | |
1766 | sizeof(press_str)); | |
1767 | } | |
1768 | ||
1769 | if (input->u.kbd.repeat_str[0]) { | |
1770 | char *repeat_str = input->u.kbd.repeat_str; | |
1771 | if (input->high_timer >= KEYPAD_REP_START) { | |
1772 | input->high_timer -= KEYPAD_REP_DELAY; | |
1773 | keypad_send_key(repeat_str, | |
1774 | sizeof(repeat_str)); | |
1775 | } | |
1776 | /* we will need to come back here soon */ | |
1777 | inputs_stable = 0; | |
1778 | } | |
1779 | ||
1780 | if (input->high_timer < 255) | |
1781 | input->high_timer++; | |
1782 | } | |
1783 | return 1; | |
1784 | } else { | |
1785 | /* else signal falling down. Let's fall through. */ | |
1786 | input->state = INPUT_ST_FALLING; | |
1787 | input->fall_timer = 0; | |
1788 | } | |
1789 | return 0; | |
1790 | } | |
1791 | ||
1792 | static inline void input_state_falling(struct logical_input *input) | |
1793 | { | |
1794 | #if 0 | |
1795 | /* FIXME !!! same comment as in input_state_high */ | |
1796 | if (((phys_prev & input->mask) == input->value) | |
1797 | && ((phys_curr & input->mask) > input->value)) { | |
1798 | input->state = INPUT_ST_LOW; /* invalidate */ | |
1799 | return; | |
1800 | } | |
1801 | #endif | |
1802 | ||
1803 | if ((phys_curr & input->mask) == input->value) { | |
1804 | if (input->type == INPUT_TYPE_KBD) { | |
1805 | /* will turn on the light */ | |
1806 | keypressed = 1; | |
1807 | ||
1808 | if (input->u.kbd.repeat_str[0]) { | |
1809 | char *repeat_str = input->u.kbd.repeat_str; | |
1810 | if (input->high_timer >= KEYPAD_REP_START) | |
1811 | input->high_timer -= KEYPAD_REP_DELAY; | |
1812 | keypad_send_key(repeat_str, | |
1813 | sizeof(repeat_str)); | |
1814 | /* we will need to come back here soon */ | |
1815 | inputs_stable = 0; | |
1816 | } | |
1817 | ||
1818 | if (input->high_timer < 255) | |
1819 | input->high_timer++; | |
1820 | } | |
1821 | input->state = INPUT_ST_HIGH; | |
1822 | } else if (input->fall_timer >= input->fall_time) { | |
1823 | /* call release event */ | |
1824 | if (input->type == INPUT_TYPE_STD) { | |
1825 | void (*release_fct)(int) = input->u.std.release_fct; | |
1826 | if (release_fct != NULL) | |
1827 | release_fct(input->u.std.release_data); | |
1828 | } else if (input->type == INPUT_TYPE_KBD) { | |
1829 | char *release_str = input->u.kbd.release_str; | |
1830 | if (release_str[0]) | |
1831 | keypad_send_key(release_str, | |
1832 | sizeof(release_str)); | |
1833 | } | |
1834 | ||
1835 | input->state = INPUT_ST_LOW; | |
1836 | } else { | |
1837 | input->fall_timer++; | |
1838 | inputs_stable = 0; | |
1839 | } | |
7005b584 WT |
1840 | } |
1841 | ||
698b1515 WT |
1842 | static void panel_process_inputs(void) |
1843 | { | |
1844 | struct list_head *item; | |
1845 | struct logical_input *input; | |
7005b584 WT |
1846 | |
1847 | #if 0 | |
698b1515 WT |
1848 | printk(KERN_DEBUG |
1849 | "entering panel_process_inputs with pp=%016Lx & pc=%016Lx\n", | |
1850 | phys_prev, phys_curr); | |
7005b584 WT |
1851 | #endif |
1852 | ||
698b1515 WT |
1853 | keypressed = 0; |
1854 | inputs_stable = 1; | |
1855 | list_for_each(item, &logical_inputs) { | |
1856 | input = list_entry(item, struct logical_input, list); | |
1857 | ||
1858 | switch (input->state) { | |
1859 | case INPUT_ST_LOW: | |
1860 | if ((phys_curr & input->mask) != input->value) | |
1861 | break; | |
429ccf05 HH |
1862 | /* if all needed ones were already set previously, |
1863 | * this means that this logical signal has been | |
1864 | * activated by the releasing of another combined | |
1865 | * signal, so we don't want to match. | |
1866 | * eg: AB -(release B)-> A -(release A)-> 0 : | |
1867 | * don't match A. | |
698b1515 WT |
1868 | */ |
1869 | if ((phys_prev & input->mask) == input->value) | |
1870 | break; | |
1871 | input->rise_timer = 0; | |
1872 | input->state = INPUT_ST_RISING; | |
1873 | /* no break here, fall through */ | |
1874 | case INPUT_ST_RISING: | |
1875 | if ((phys_curr & input->mask) != input->value) { | |
1876 | input->state = INPUT_ST_LOW; | |
1877 | break; | |
1878 | } | |
1879 | if (input->rise_timer < input->rise_time) { | |
1880 | inputs_stable = 0; | |
1881 | input->rise_timer++; | |
1882 | break; | |
1883 | } | |
1884 | input->high_timer = 0; | |
1885 | input->state = INPUT_ST_HIGH; | |
1886 | /* no break here, fall through */ | |
1887 | case INPUT_ST_HIGH: | |
429ccf05 | 1888 | if (input_state_high(input)) |
698b1515 | 1889 | break; |
698b1515 WT |
1890 | /* no break here, fall through */ |
1891 | case INPUT_ST_FALLING: | |
429ccf05 | 1892 | input_state_falling(input); |
698b1515 WT |
1893 | } |
1894 | } | |
1895 | } | |
7005b584 | 1896 | |
698b1515 WT |
1897 | static void panel_scan_timer(void) |
1898 | { | |
63023177 | 1899 | if (keypad_enabled && keypad_initialized) { |
698b1515 WT |
1900 | if (spin_trylock(&pprt_lock)) { |
1901 | phys_scan_contacts(); | |
429ccf05 HH |
1902 | |
1903 | /* no need for the parport anymore */ | |
1904 | spin_unlock(&pprt_lock); | |
7005b584 WT |
1905 | } |
1906 | ||
698b1515 WT |
1907 | if (!inputs_stable || phys_curr != phys_prev) |
1908 | panel_process_inputs(); | |
7005b584 | 1909 | } |
7005b584 | 1910 | |
698b1515 WT |
1911 | if (lcd_enabled && lcd_initialized) { |
1912 | if (keypressed) { | |
1913 | if (light_tempo == 0 && ((lcd_flags & LCD_FLAG_L) == 0)) | |
1914 | lcd_backlight(1); | |
1915 | light_tempo = FLASH_LIGHT_TEMPO; | |
1916 | } else if (light_tempo > 0) { | |
1917 | light_tempo--; | |
1918 | if (light_tempo == 0 && ((lcd_flags & LCD_FLAG_L) == 0)) | |
1919 | lcd_backlight(0); | |
1920 | } | |
1921 | } | |
1922 | ||
1923 | mod_timer(&scan_timer, jiffies + INPUT_POLL_TIME); | |
7005b584 WT |
1924 | } |
1925 | ||
698b1515 WT |
1926 | static void init_scan_timer(void) |
1927 | { | |
1928 | if (scan_timer.function != NULL) | |
1929 | return; /* already started */ | |
1930 | ||
1931 | init_timer(&scan_timer); | |
1932 | scan_timer.expires = jiffies + INPUT_POLL_TIME; | |
1933 | scan_timer.data = 0; | |
1934 | scan_timer.function = (void *)&panel_scan_timer; | |
1935 | add_timer(&scan_timer); | |
7005b584 WT |
1936 | } |
1937 | ||
1938 | /* converts a name of the form "({BbAaPpSsEe}{01234567-})*" to a series of bits. | |
429ccf05 HH |
1939 | * if <omask> or <imask> are non-null, they will be or'ed with the bits |
1940 | * corresponding to out and in bits respectively. | |
7005b584 WT |
1941 | * returns 1 if ok, 0 if error (in which case, nothing is written). |
1942 | */ | |
698b1515 WT |
1943 | static int input_name2mask(char *name, pmask_t *mask, pmask_t *value, |
1944 | char *imask, char *omask) | |
1945 | { | |
1946 | static char sigtab[10] = "EeSsPpAaBb"; | |
1947 | char im, om; | |
1948 | pmask_t m, v; | |
1949 | ||
1950 | om = im = m = v = 0ULL; | |
1951 | while (*name) { | |
1952 | int in, out, bit, neg; | |
429ccf05 HH |
1953 | for (in = 0; (in < sizeof(sigtab)) && |
1954 | (sigtab[in] != *name); in++) | |
698b1515 WT |
1955 | ; |
1956 | if (in >= sizeof(sigtab)) | |
1957 | return 0; /* input name not found */ | |
1958 | neg = (in & 1); /* odd (lower) names are negated */ | |
1959 | in >>= 1; | |
1960 | im |= (1 << in); | |
1961 | ||
1962 | name++; | |
1963 | if (isdigit(*name)) { | |
1964 | out = *name - '0'; | |
1965 | om |= (1 << out); | |
1966 | } else if (*name == '-') | |
1967 | out = 8; | |
1968 | else | |
1969 | return 0; /* unknown bit name */ | |
1970 | ||
1971 | bit = (out * 5) + in; | |
1972 | ||
1973 | m |= 1ULL << bit; | |
1974 | if (!neg) | |
1975 | v |= 1ULL << bit; | |
1976 | name++; | |
7005b584 | 1977 | } |
698b1515 WT |
1978 | *mask = m; |
1979 | *value = v; | |
1980 | if (imask) | |
1981 | *imask |= im; | |
1982 | if (omask) | |
1983 | *omask |= om; | |
1984 | return 1; | |
7005b584 WT |
1985 | } |
1986 | ||
1987 | /* tries to bind a key to the signal name <name>. The key will send the | |
1988 | * strings <press>, <repeat>, <release> for these respective events. | |
1989 | * Returns the pointer to the new key if ok, NULL if the key could not be bound. | |
1990 | */ | |
698b1515 WT |
1991 | static struct logical_input *panel_bind_key(char *name, char *press, |
1992 | char *repeat, char *release) | |
1993 | { | |
1994 | struct logical_input *key; | |
1995 | ||
7a6cb0d5 | 1996 | key = kzalloc(sizeof(struct logical_input), GFP_KERNEL); |
698b1515 WT |
1997 | if (!key) { |
1998 | printk(KERN_ERR "panel: not enough memory\n"); | |
1999 | return NULL; | |
2000 | } | |
698b1515 WT |
2001 | if (!input_name2mask(name, &key->mask, &key->value, &scan_mask_i, |
2002 | &scan_mask_o)) | |
2003 | return NULL; | |
2004 | ||
2005 | key->type = INPUT_TYPE_KBD; | |
2006 | key->state = INPUT_ST_LOW; | |
2007 | key->rise_time = 1; | |
2008 | key->fall_time = 1; | |
7005b584 WT |
2009 | |
2010 | #if 0 | |
698b1515 WT |
2011 | printk(KERN_DEBUG "bind: <%s> : m=%016Lx v=%016Lx\n", name, key->mask, |
2012 | key->value); | |
7005b584 | 2013 | #endif |
698b1515 WT |
2014 | strncpy(key->u.kbd.press_str, press, sizeof(key->u.kbd.press_str)); |
2015 | strncpy(key->u.kbd.repeat_str, repeat, sizeof(key->u.kbd.repeat_str)); | |
2016 | strncpy(key->u.kbd.release_str, release, | |
2017 | sizeof(key->u.kbd.release_str)); | |
2018 | list_add(&key->list, &logical_inputs); | |
2019 | return key; | |
7005b584 WT |
2020 | } |
2021 | ||
63023177 | 2022 | #if 0 |
7005b584 WT |
2023 | /* tries to bind a callback function to the signal name <name>. The function |
2024 | * <press_fct> will be called with the <press_data> arg when the signal is | |
2025 | * activated, and so on for <release_fct>/<release_data> | |
429ccf05 HH |
2026 | * Returns the pointer to the new signal if ok, NULL if the signal could not |
2027 | * be bound. | |
7005b584 WT |
2028 | */ |
2029 | static struct logical_input *panel_bind_callback(char *name, | |
698b1515 WT |
2030 | void (*press_fct) (int), |
2031 | int press_data, | |
2032 | void (*release_fct) (int), | |
2033 | int release_data) | |
2034 | { | |
2035 | struct logical_input *callback; | |
2036 | ||
2037 | callback = kmalloc(sizeof(struct logical_input), GFP_KERNEL); | |
2038 | if (!callback) { | |
2039 | printk(KERN_ERR "panel: not enough memory\n"); | |
2040 | return NULL; | |
2041 | } | |
2042 | memset(callback, 0, sizeof(struct logical_input)); | |
2043 | if (!input_name2mask(name, &callback->mask, &callback->value, | |
2044 | &scan_mask_i, &scan_mask_o)) | |
2045 | return NULL; | |
2046 | ||
2047 | callback->type = INPUT_TYPE_STD; | |
2048 | callback->state = INPUT_ST_LOW; | |
2049 | callback->rise_time = 1; | |
2050 | callback->fall_time = 1; | |
2051 | callback->u.std.press_fct = press_fct; | |
2052 | callback->u.std.press_data = press_data; | |
2053 | callback->u.std.release_fct = release_fct; | |
2054 | callback->u.std.release_data = release_data; | |
2055 | list_add(&callback->list, &logical_inputs); | |
2056 | return callback; | |
7005b584 | 2057 | } |
63023177 | 2058 | #endif |
7005b584 | 2059 | |
698b1515 WT |
2060 | static void keypad_init(void) |
2061 | { | |
2062 | int keynum; | |
2063 | init_waitqueue_head(&keypad_read_wait); | |
2064 | keypad_buflen = 0; /* flushes any eventual noisy keystroke */ | |
7005b584 | 2065 | |
698b1515 | 2066 | /* Let's create all known keys */ |
7005b584 | 2067 | |
698b1515 WT |
2068 | for (keynum = 0; keypad_profile[keynum][0][0]; keynum++) { |
2069 | panel_bind_key(keypad_profile[keynum][0], | |
2070 | keypad_profile[keynum][1], | |
2071 | keypad_profile[keynum][2], | |
2072 | keypad_profile[keynum][3]); | |
2073 | } | |
7005b584 | 2074 | |
698b1515 WT |
2075 | init_scan_timer(); |
2076 | keypad_initialized = 1; | |
7005b584 WT |
2077 | } |
2078 | ||
7005b584 WT |
2079 | /**************************************************/ |
2080 | /* device initialization */ | |
2081 | /**************************************************/ | |
2082 | ||
698b1515 WT |
2083 | static int panel_notify_sys(struct notifier_block *this, unsigned long code, |
2084 | void *unused) | |
2085 | { | |
2086 | if (lcd_enabled && lcd_initialized) { | |
2087 | switch (code) { | |
2088 | case SYS_DOWN: | |
2089 | panel_lcd_print | |
2090 | ("\x0cReloading\nSystem...\x1b[Lc\x1b[Lb\x1b[L+"); | |
2091 | break; | |
2092 | case SYS_HALT: | |
2093 | panel_lcd_print | |
2094 | ("\x0cSystem Halted.\x1b[Lc\x1b[Lb\x1b[L+"); | |
2095 | break; | |
2096 | case SYS_POWER_OFF: | |
2097 | panel_lcd_print("\x0cPower off.\x1b[Lc\x1b[Lb\x1b[L+"); | |
2098 | break; | |
2099 | default: | |
2100 | break; | |
2101 | } | |
7005b584 | 2102 | } |
698b1515 | 2103 | return NOTIFY_DONE; |
7005b584 WT |
2104 | } |
2105 | ||
2106 | static struct notifier_block panel_notifier = { | |
2107 | panel_notify_sys, | |
2108 | NULL, | |
2109 | 0 | |
2110 | }; | |
2111 | ||
698b1515 | 2112 | static void panel_attach(struct parport *port) |
7005b584 | 2113 | { |
698b1515 WT |
2114 | if (port->number != parport) |
2115 | return; | |
2116 | ||
2117 | if (pprt) { | |
2118 | printk(KERN_ERR | |
429ccf05 HH |
2119 | "panel_attach(): port->number=%d parport=%d, " |
2120 | "already registered !\n", | |
698b1515 WT |
2121 | port->number, parport); |
2122 | return; | |
2123 | } | |
2124 | ||
429ccf05 | 2125 | pprt = parport_register_device(port, "panel", NULL, NULL, /* pf, kf */ |
698b1515 WT |
2126 | NULL, |
2127 | /*PARPORT_DEV_EXCL */ | |
2128 | 0, (void *)&pprt); | |
2129 | ||
2130 | if (parport_claim(pprt)) { | |
2131 | printk(KERN_ERR | |
429ccf05 HH |
2132 | "Panel: could not claim access to parport%d. " |
2133 | "Aborting.\n", parport); | |
698b1515 WT |
2134 | return; |
2135 | } | |
2136 | ||
429ccf05 HH |
2137 | /* must init LCD first, just in case an IRQ from the keypad is |
2138 | * generated at keypad init | |
2139 | */ | |
698b1515 WT |
2140 | if (lcd_enabled) { |
2141 | lcd_init(); | |
2142 | misc_register(&lcd_dev); | |
2143 | } | |
2144 | ||
2145 | if (keypad_enabled) { | |
2146 | keypad_init(); | |
2147 | misc_register(&keypad_dev); | |
2148 | } | |
7005b584 WT |
2149 | } |
2150 | ||
698b1515 | 2151 | static void panel_detach(struct parport *port) |
7005b584 | 2152 | { |
698b1515 WT |
2153 | if (port->number != parport) |
2154 | return; | |
2155 | ||
2156 | if (!pprt) { | |
2157 | printk(KERN_ERR | |
429ccf05 HH |
2158 | "panel_detach(): port->number=%d parport=%d, " |
2159 | "nothing to unregister.\n", | |
698b1515 WT |
2160 | port->number, parport); |
2161 | return; | |
2162 | } | |
2163 | ||
0b0595bf | 2164 | if (keypad_enabled && keypad_initialized) { |
698b1515 | 2165 | misc_deregister(&keypad_dev); |
0b0595bf PH |
2166 | keypad_initialized = 0; |
2167 | } | |
698b1515 | 2168 | |
0b0595bf | 2169 | if (lcd_enabled && lcd_initialized) { |
698b1515 | 2170 | misc_deregister(&lcd_dev); |
0b0595bf PH |
2171 | lcd_initialized = 0; |
2172 | } | |
698b1515 WT |
2173 | |
2174 | parport_release(pprt); | |
2175 | parport_unregister_device(pprt); | |
2176 | pprt = NULL; | |
7005b584 WT |
2177 | } |
2178 | ||
2179 | static struct parport_driver panel_driver = { | |
698b1515 WT |
2180 | .name = "panel", |
2181 | .attach = panel_attach, | |
2182 | .detach = panel_detach, | |
7005b584 WT |
2183 | }; |
2184 | ||
2185 | /* init function */ | |
698b1515 WT |
2186 | int panel_init(void) |
2187 | { | |
2188 | /* for backwards compatibility */ | |
2189 | if (keypad_type < 0) | |
2190 | keypad_type = keypad_enabled; | |
2191 | ||
2192 | if (lcd_type < 0) | |
2193 | lcd_type = lcd_enabled; | |
2194 | ||
2195 | if (parport < 0) | |
2196 | parport = DEFAULT_PARPORT; | |
2197 | ||
2198 | /* take care of an eventual profile */ | |
2199 | switch (profile) { | |
429ccf05 HH |
2200 | case PANEL_PROFILE_CUSTOM: |
2201 | /* custom profile */ | |
698b1515 WT |
2202 | if (keypad_type < 0) |
2203 | keypad_type = DEFAULT_KEYPAD; | |
698b1515 WT |
2204 | if (lcd_type < 0) |
2205 | lcd_type = DEFAULT_LCD; | |
2206 | break; | |
429ccf05 HH |
2207 | case PANEL_PROFILE_OLD: |
2208 | /* 8 bits, 2*16, old keypad */ | |
698b1515 WT |
2209 | if (keypad_type < 0) |
2210 | keypad_type = KEYPAD_TYPE_OLD; | |
698b1515 WT |
2211 | if (lcd_type < 0) |
2212 | lcd_type = LCD_TYPE_OLD; | |
2213 | if (lcd_width < 0) | |
2214 | lcd_width = 16; | |
2215 | if (lcd_hwidth < 0) | |
2216 | lcd_hwidth = 16; | |
2217 | break; | |
429ccf05 HH |
2218 | case PANEL_PROFILE_NEW: |
2219 | /* serial, 2*16, new keypad */ | |
698b1515 WT |
2220 | if (keypad_type < 0) |
2221 | keypad_type = KEYPAD_TYPE_NEW; | |
698b1515 WT |
2222 | if (lcd_type < 0) |
2223 | lcd_type = LCD_TYPE_KS0074; | |
2224 | break; | |
429ccf05 HH |
2225 | case PANEL_PROFILE_HANTRONIX: |
2226 | /* 8 bits, 2*16 hantronix-like, no keypad */ | |
698b1515 WT |
2227 | if (keypad_type < 0) |
2228 | keypad_type = KEYPAD_TYPE_NONE; | |
698b1515 WT |
2229 | if (lcd_type < 0) |
2230 | lcd_type = LCD_TYPE_HANTRONIX; | |
2231 | break; | |
429ccf05 HH |
2232 | case PANEL_PROFILE_NEXCOM: |
2233 | /* generic 8 bits, 2*16, nexcom keypad, eg. Nexcom. */ | |
698b1515 WT |
2234 | if (keypad_type < 0) |
2235 | keypad_type = KEYPAD_TYPE_NEXCOM; | |
698b1515 WT |
2236 | if (lcd_type < 0) |
2237 | lcd_type = LCD_TYPE_NEXCOM; | |
2238 | break; | |
429ccf05 HH |
2239 | case PANEL_PROFILE_LARGE: |
2240 | /* 8 bits, 2*40, old keypad */ | |
698b1515 WT |
2241 | if (keypad_type < 0) |
2242 | keypad_type = KEYPAD_TYPE_OLD; | |
698b1515 WT |
2243 | if (lcd_type < 0) |
2244 | lcd_type = LCD_TYPE_OLD; | |
2245 | break; | |
2246 | } | |
2247 | ||
2248 | lcd_enabled = (lcd_type > 0); | |
2249 | keypad_enabled = (keypad_type > 0); | |
2250 | ||
2251 | switch (keypad_type) { | |
2252 | case KEYPAD_TYPE_OLD: | |
2253 | keypad_profile = old_keypad_profile; | |
2254 | break; | |
2255 | case KEYPAD_TYPE_NEW: | |
2256 | keypad_profile = new_keypad_profile; | |
2257 | break; | |
2258 | case KEYPAD_TYPE_NEXCOM: | |
2259 | keypad_profile = nexcom_keypad_profile; | |
2260 | break; | |
2261 | default: | |
2262 | keypad_profile = NULL; | |
2263 | break; | |
2264 | } | |
2265 | ||
2266 | /* tells various subsystems about the fact that we are initializing */ | |
2267 | init_in_progress = 1; | |
2268 | ||
2269 | if (parport_register_driver(&panel_driver)) { | |
2270 | printk(KERN_ERR | |
2271 | "Panel: could not register with parport. Aborting.\n"); | |
2272 | return -EIO; | |
2273 | } | |
2274 | ||
63023177 WT |
2275 | if (!lcd_enabled && !keypad_enabled) { |
2276 | /* no device enabled, let's release the parport */ | |
698b1515 WT |
2277 | if (pprt) { |
2278 | parport_release(pprt); | |
2279 | parport_unregister_device(pprt); | |
2280 | } | |
2281 | parport_unregister_driver(&panel_driver); | |
2282 | printk(KERN_ERR "Panel driver version " PANEL_VERSION | |
2283 | " disabled.\n"); | |
2284 | return -ENODEV; | |
7005b584 | 2285 | } |
7005b584 | 2286 | |
698b1515 WT |
2287 | register_reboot_notifier(&panel_notifier); |
2288 | ||
2289 | if (pprt) | |
2290 | printk(KERN_INFO "Panel driver version " PANEL_VERSION | |
2291 | " registered on parport%d (io=0x%lx).\n", parport, | |
2292 | pprt->port->base); | |
2293 | else | |
2294 | printk(KERN_INFO "Panel driver version " PANEL_VERSION | |
2295 | " not yet registered\n"); | |
429ccf05 HH |
2296 | /* tells various subsystems about the fact that initialization |
2297 | is finished */ | |
698b1515 WT |
2298 | init_in_progress = 0; |
2299 | return 0; | |
2300 | } | |
7005b584 | 2301 | |
f6d1fcfe | 2302 | static int __init panel_init_module(void) |
698b1515 WT |
2303 | { |
2304 | return panel_init(); | |
7005b584 WT |
2305 | } |
2306 | ||
f6d1fcfe | 2307 | static void __exit panel_cleanup_module(void) |
698b1515 WT |
2308 | { |
2309 | unregister_reboot_notifier(&panel_notifier); | |
7005b584 | 2310 | |
698b1515 WT |
2311 | if (scan_timer.function != NULL) |
2312 | del_timer(&scan_timer); | |
7005b584 | 2313 | |
5789813e | 2314 | if (pprt != NULL) { |
0b0595bf | 2315 | if (keypad_enabled) { |
5789813e | 2316 | misc_deregister(&keypad_dev); |
0b0595bf PH |
2317 | keypad_initialized = 0; |
2318 | } | |
5789813e CL |
2319 | |
2320 | if (lcd_enabled) { | |
2321 | panel_lcd_print("\x0cLCD driver " PANEL_VERSION | |
2322 | "\nunloaded.\x1b[Lc\x1b[Lb\x1b[L-"); | |
2323 | misc_deregister(&lcd_dev); | |
0b0595bf | 2324 | lcd_initialized = 0; |
5789813e | 2325 | } |
7005b584 | 2326 | |
5789813e CL |
2327 | /* TODO: free all input signals */ |
2328 | parport_release(pprt); | |
2329 | parport_unregister_device(pprt); | |
698b1515 | 2330 | } |
698b1515 | 2331 | parport_unregister_driver(&panel_driver); |
7005b584 | 2332 | } |
7005b584 | 2333 | |
7005b584 WT |
2334 | module_init(panel_init_module); |
2335 | module_exit(panel_cleanup_module); | |
2336 | MODULE_AUTHOR("Willy Tarreau"); | |
2337 | MODULE_LICENSE("GPL"); | |
7005b584 WT |
2338 | |
2339 | /* | |
2340 | * Local variables: | |
2341 | * c-indent-level: 4 | |
2342 | * tab-width: 8 | |
2343 | * End: | |
2344 | */ |