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Commit | Line | Data |
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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 | ||
493aa896 TY |
37 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
38 | ||
7005b584 WT |
39 | #include <linux/module.h> |
40 | ||
41 | #include <linux/types.h> | |
42 | #include <linux/errno.h> | |
43 | #include <linux/signal.h> | |
44 | #include <linux/sched.h> | |
45 | #include <linux/spinlock.h> | |
7005b584 WT |
46 | #include <linux/interrupt.h> |
47 | #include <linux/miscdevice.h> | |
698b1515 | 48 | #include <linux/slab.h> |
7005b584 WT |
49 | #include <linux/ioport.h> |
50 | #include <linux/fcntl.h> | |
51 | #include <linux/init.h> | |
52 | #include <linux/delay.h> | |
d85170ed | 53 | #include <linux/kernel.h> |
7005b584 WT |
54 | #include <linux/ctype.h> |
55 | #include <linux/parport.h> | |
7005b584 WT |
56 | #include <linux/list.h> |
57 | #include <linux/notifier.h> | |
58 | #include <linux/reboot.h> | |
273b281f | 59 | #include <generated/utsrelease.h> |
7005b584 | 60 | |
698b1515 | 61 | #include <linux/io.h> |
48f658bb | 62 | #include <linux/uaccess.h> |
7005b584 | 63 | |
7005b584 WT |
64 | #define LCD_MINOR 156 |
65 | #define KEYPAD_MINOR 185 | |
7005b584 WT |
66 | |
67 | #define PANEL_VERSION "0.9.5" | |
68 | ||
69 | #define LCD_MAXBYTES 256 /* max burst write */ | |
70 | ||
7005b584 | 71 | #define KEYPAD_BUFFER 64 |
7005b584 | 72 | |
429ccf05 | 73 | /* poll the keyboard this every second */ |
2b3c9eb2 | 74 | #define INPUT_POLL_TIME (HZ / 50) |
429ccf05 HH |
75 | /* a key starts to repeat after this times INPUT_POLL_TIME */ |
76 | #define KEYPAD_REP_START (10) | |
77 | /* a key repeats this times INPUT_POLL_TIME */ | |
78 | #define KEYPAD_REP_DELAY (2) | |
79 | ||
80 | /* keep the light on this times INPUT_POLL_TIME for each flash */ | |
81 | #define FLASH_LIGHT_TEMPO (200) | |
7005b584 WT |
82 | |
83 | /* converts an r_str() input to an active high, bits string : 000BAOSE */ | |
84 | #define PNL_PINPUT(a) ((((unsigned char)(a)) ^ 0x7F) >> 3) | |
85 | ||
698b1515 WT |
86 | #define PNL_PBUSY 0x80 /* inverted input, active low */ |
87 | #define PNL_PACK 0x40 /* direct input, active low */ | |
88 | #define PNL_POUTPA 0x20 /* direct input, active high */ | |
89 | #define PNL_PSELECD 0x10 /* direct input, active high */ | |
90 | #define PNL_PERRORP 0x08 /* direct input, active low */ | |
7005b584 | 91 | |
698b1515 | 92 | #define PNL_PBIDIR 0x20 /* bi-directional ports */ |
429ccf05 HH |
93 | /* high to read data in or-ed with data out */ |
94 | #define PNL_PINTEN 0x10 | |
698b1515 WT |
95 | #define PNL_PSELECP 0x08 /* inverted output, active low */ |
96 | #define PNL_PINITP 0x04 /* direct output, active low */ | |
97 | #define PNL_PAUTOLF 0x02 /* inverted output, active low */ | |
98 | #define PNL_PSTROBE 0x01 /* inverted output */ | |
7005b584 WT |
99 | |
100 | #define PNL_PD0 0x01 | |
101 | #define PNL_PD1 0x02 | |
102 | #define PNL_PD2 0x04 | |
103 | #define PNL_PD3 0x08 | |
104 | #define PNL_PD4 0x10 | |
105 | #define PNL_PD5 0x20 | |
106 | #define PNL_PD6 0x40 | |
107 | #define PNL_PD7 0x80 | |
108 | ||
109 | #define PIN_NONE 0 | |
110 | #define PIN_STROBE 1 | |
111 | #define PIN_D0 2 | |
112 | #define PIN_D1 3 | |
113 | #define PIN_D2 4 | |
114 | #define PIN_D3 5 | |
115 | #define PIN_D4 6 | |
116 | #define PIN_D5 7 | |
117 | #define PIN_D6 8 | |
118 | #define PIN_D7 9 | |
119 | #define PIN_AUTOLF 14 | |
120 | #define PIN_INITP 16 | |
121 | #define PIN_SELECP 17 | |
122 | #define PIN_NOT_SET 127 | |
123 | ||
7005b584 WT |
124 | #define LCD_FLAG_S 0x0001 |
125 | #define LCD_FLAG_ID 0x0002 | |
126 | #define LCD_FLAG_B 0x0004 /* blink on */ | |
127 | #define LCD_FLAG_C 0x0008 /* cursor on */ | |
128 | #define LCD_FLAG_D 0x0010 /* display on */ | |
129 | #define LCD_FLAG_F 0x0020 /* large font mode */ | |
130 | #define LCD_FLAG_N 0x0040 /* 2-rows mode */ | |
131 | #define LCD_FLAG_L 0x0080 /* backlight enabled */ | |
132 | ||
2114924a MG |
133 | /* LCD commands */ |
134 | #define LCD_CMD_DISPLAY_CLEAR 0x01 /* Clear entire display */ | |
135 | ||
136 | #define LCD_CMD_ENTRY_MODE 0x04 /* Set entry mode */ | |
137 | #define LCD_CMD_CURSOR_INC 0x02 /* Increment cursor */ | |
138 | ||
139 | #define LCD_CMD_DISPLAY_CTRL 0x08 /* Display control */ | |
140 | #define LCD_CMD_DISPLAY_ON 0x04 /* Set display on */ | |
141 | #define LCD_CMD_CURSOR_ON 0x02 /* Set cursor on */ | |
142 | #define LCD_CMD_BLINK_ON 0x01 /* Set blink on */ | |
143 | ||
144 | #define LCD_CMD_SHIFT 0x10 /* Shift cursor/display */ | |
145 | #define LCD_CMD_DISPLAY_SHIFT 0x08 /* Shift display instead of cursor */ | |
146 | #define LCD_CMD_SHIFT_RIGHT 0x04 /* Shift display/cursor to the right */ | |
147 | ||
148 | #define LCD_CMD_FUNCTION_SET 0x20 /* Set function */ | |
149 | #define LCD_CMD_DATA_LEN_8BITS 0x10 /* Set data length to 8 bits */ | |
150 | #define LCD_CMD_TWO_LINES 0x08 /* Set to two display lines */ | |
151 | #define LCD_CMD_FONT_5X10_DOTS 0x04 /* Set char font to 5x10 dots */ | |
152 | ||
153 | #define LCD_CMD_SET_CGRAM_ADDR 0x40 /* Set char generator RAM address */ | |
154 | ||
155 | #define LCD_CMD_SET_DDRAM_ADDR 0x80 /* Set display data RAM address */ | |
156 | ||
429ccf05 | 157 | #define LCD_ESCAPE_LEN 24 /* max chars for LCD escape command */ |
7005b584 WT |
158 | #define LCD_ESCAPE_CHAR 27 /* use char 27 for escape command */ |
159 | ||
36277d4a MG |
160 | #define NOT_SET -1 |
161 | ||
7005b584 WT |
162 | /* macros to simplify use of the parallel port */ |
163 | #define r_ctr(x) (parport_read_control((x)->port)) | |
164 | #define r_dtr(x) (parport_read_data((x)->port)) | |
165 | #define r_str(x) (parport_read_status((x)->port)) | |
6ebb56d9 TY |
166 | #define w_ctr(x, y) (parport_write_control((x)->port, (y))) |
167 | #define w_dtr(x, y) (parport_write_data((x)->port, (y))) | |
7005b584 WT |
168 | |
169 | /* this defines which bits are to be used and which ones to be ignored */ | |
429ccf05 HH |
170 | /* logical or of the output bits involved in the scan matrix */ |
171 | static __u8 scan_mask_o; | |
172 | /* logical or of the input bits involved in the scan matrix */ | |
173 | static __u8 scan_mask_i; | |
7005b584 | 174 | |
698b1515 | 175 | typedef __u64 pmask_t; |
7005b584 WT |
176 | |
177 | enum input_type { | |
698b1515 WT |
178 | INPUT_TYPE_STD, |
179 | INPUT_TYPE_KBD, | |
7005b584 WT |
180 | }; |
181 | ||
182 | enum input_state { | |
698b1515 WT |
183 | INPUT_ST_LOW, |
184 | INPUT_ST_RISING, | |
185 | INPUT_ST_HIGH, | |
186 | INPUT_ST_FALLING, | |
7005b584 WT |
187 | }; |
188 | ||
189 | struct logical_input { | |
698b1515 WT |
190 | struct list_head list; |
191 | pmask_t mask; | |
192 | pmask_t value; | |
193 | enum input_type type; | |
194 | enum input_state state; | |
195 | __u8 rise_time, fall_time; | |
196 | __u8 rise_timer, fall_timer, high_timer; | |
197 | ||
198 | union { | |
429ccf05 | 199 | struct { /* valid when type == INPUT_TYPE_STD */ |
68d386bf MA |
200 | void (*press_fct)(int); |
201 | void (*release_fct)(int); | |
698b1515 WT |
202 | int press_data; |
203 | int release_data; | |
204 | } std; | |
429ccf05 HH |
205 | struct { /* valid when type == INPUT_TYPE_KBD */ |
206 | /* strings can be non null-terminated */ | |
698b1515 WT |
207 | char press_str[sizeof(void *) + sizeof(int)]; |
208 | char repeat_str[sizeof(void *) + sizeof(int)]; | |
209 | char release_str[sizeof(void *) + sizeof(int)]; | |
210 | } kbd; | |
211 | } u; | |
7005b584 WT |
212 | }; |
213 | ||
36d2041a | 214 | static LIST_HEAD(logical_inputs); /* list of all defined logical inputs */ |
7005b584 WT |
215 | |
216 | /* physical contacts history | |
217 | * Physical contacts are a 45 bits string of 9 groups of 5 bits each. | |
218 | * The 8 lower groups correspond to output bits 0 to 7, and the 9th group | |
219 | * corresponds to the ground. | |
220 | * Within each group, bits are stored in the same order as read on the port : | |
221 | * BAPSE (busy=4, ack=3, paper empty=2, select=1, error=0). | |
222 | * So, each __u64 (or pmask_t) is represented like this : | |
223 | * 0000000000000000000BAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSE | |
224 | * <-----unused------><gnd><d07><d06><d05><d04><d03><d02><d01><d00> | |
225 | */ | |
429ccf05 HH |
226 | |
227 | /* what has just been read from the I/O ports */ | |
228 | static pmask_t phys_read; | |
229 | /* previous phys_read */ | |
230 | static pmask_t phys_read_prev; | |
231 | /* stabilized phys_read (phys_read|phys_read_prev) */ | |
232 | static pmask_t phys_curr; | |
233 | /* previous phys_curr */ | |
234 | static pmask_t phys_prev; | |
235 | /* 0 means that at least one logical signal needs be computed */ | |
236 | static char inputs_stable; | |
7005b584 | 237 | |
7005b584 | 238 | /* these variables are specific to the keypad */ |
a8b2580b MG |
239 | static struct { |
240 | bool enabled; | |
241 | } keypad; | |
242 | ||
7005b584 | 243 | static char keypad_buffer[KEYPAD_BUFFER]; |
698b1515 WT |
244 | static int keypad_buflen; |
245 | static int keypad_start; | |
246 | static char keypressed; | |
7005b584 | 247 | static wait_queue_head_t keypad_read_wait; |
7005b584 WT |
248 | |
249 | /* lcd-specific variables */ | |
a8b2580b MG |
250 | static struct { |
251 | bool enabled; | |
6d8b588c MG |
252 | bool initialized; |
253 | bool must_clear; | |
254 | ||
8037e2a3 MG |
255 | int height; |
256 | int width; | |
257 | int bwidth; | |
258 | int hwidth; | |
259 | int charset; | |
260 | int proto; | |
6d8b588c MG |
261 | int light_tempo; |
262 | ||
8037e2a3 MG |
263 | /* TODO: use union here? */ |
264 | struct { | |
265 | int e; | |
266 | int rs; | |
267 | int rw; | |
268 | int cl; | |
269 | int da; | |
270 | int bl; | |
271 | } pins; | |
6d8b588c MG |
272 | |
273 | /* contains the LCD config state */ | |
274 | unsigned long int flags; | |
275 | ||
276 | /* Contains the LCD X and Y offset */ | |
277 | struct { | |
278 | unsigned long int x; | |
279 | unsigned long int y; | |
280 | } addr; | |
281 | ||
282 | /* Current escape sequence and it's length or -1 if outside */ | |
283 | struct { | |
284 | char buf[LCD_ESCAPE_LEN + 1]; | |
285 | int len; | |
286 | } esc_seq; | |
a8b2580b | 287 | } lcd; |
429ccf05 | 288 | |
87b8e0c8 MG |
289 | /* Needed only for init */ |
290 | static int selected_lcd_type = NOT_SET; | |
291 | ||
7005b584 WT |
292 | /* |
293 | * Bit masks to convert LCD signals to parallel port outputs. | |
294 | * _d_ are values for data port, _c_ are for control port. | |
295 | * [0] = signal OFF, [1] = signal ON, [2] = mask | |
296 | */ | |
698b1515 WT |
297 | #define BIT_CLR 0 |
298 | #define BIT_SET 1 | |
299 | #define BIT_MSK 2 | |
7005b584 WT |
300 | #define BIT_STATES 3 |
301 | /* | |
302 | * one entry for each bit on the LCD | |
303 | */ | |
304 | #define LCD_BIT_E 0 | |
305 | #define LCD_BIT_RS 1 | |
306 | #define LCD_BIT_RW 2 | |
307 | #define LCD_BIT_BL 3 | |
308 | #define LCD_BIT_CL 4 | |
309 | #define LCD_BIT_DA 5 | |
310 | #define LCD_BITS 6 | |
311 | ||
312 | /* | |
313 | * each bit can be either connected to a DATA or CTRL port | |
314 | */ | |
315 | #define LCD_PORT_C 0 | |
316 | #define LCD_PORT_D 1 | |
317 | #define LCD_PORTS 2 | |
318 | ||
319 | static unsigned char lcd_bits[LCD_PORTS][LCD_BITS][BIT_STATES]; | |
320 | ||
321 | /* | |
322 | * LCD protocols | |
323 | */ | |
324 | #define LCD_PROTO_PARALLEL 0 | |
325 | #define LCD_PROTO_SERIAL 1 | |
77943d31 | 326 | #define LCD_PROTO_TI_DA8XX_LCD 2 |
7005b584 WT |
327 | |
328 | /* | |
329 | * LCD character sets | |
330 | */ | |
331 | #define LCD_CHARSET_NORMAL 0 | |
332 | #define LCD_CHARSET_KS0074 1 | |
333 | ||
334 | /* | |
335 | * LCD types | |
336 | */ | |
337 | #define LCD_TYPE_NONE 0 | |
2c20d92d SM |
338 | #define LCD_TYPE_CUSTOM 1 |
339 | #define LCD_TYPE_OLD 2 | |
340 | #define LCD_TYPE_KS0074 3 | |
341 | #define LCD_TYPE_HANTRONIX 4 | |
342 | #define LCD_TYPE_NEXCOM 5 | |
7005b584 WT |
343 | |
344 | /* | |
345 | * keypad types | |
346 | */ | |
347 | #define KEYPAD_TYPE_NONE 0 | |
348 | #define KEYPAD_TYPE_OLD 1 | |
349 | #define KEYPAD_TYPE_NEW 2 | |
350 | #define KEYPAD_TYPE_NEXCOM 3 | |
351 | ||
352 | /* | |
353 | * panel profiles | |
354 | */ | |
355 | #define PANEL_PROFILE_CUSTOM 0 | |
356 | #define PANEL_PROFILE_OLD 1 | |
357 | #define PANEL_PROFILE_NEW 2 | |
358 | #define PANEL_PROFILE_HANTRONIX 3 | |
359 | #define PANEL_PROFILE_NEXCOM 4 | |
360 | #define PANEL_PROFILE_LARGE 5 | |
361 | ||
362 | /* | |
363 | * Construct custom config from the kernel's configuration | |
364 | */ | |
7005b584 | 365 | #define DEFAULT_PARPORT 0 |
fe4d7e2c | 366 | #define DEFAULT_PROFILE PANEL_PROFILE_LARGE |
98fac3d3 MG |
367 | #define DEFAULT_KEYPAD_TYPE KEYPAD_TYPE_OLD |
368 | #define DEFAULT_LCD_TYPE LCD_TYPE_OLD | |
fe4d7e2c | 369 | #define DEFAULT_LCD_HEIGHT 2 |
7005b584 WT |
370 | #define DEFAULT_LCD_WIDTH 40 |
371 | #define DEFAULT_LCD_BWIDTH 40 | |
372 | #define DEFAULT_LCD_HWIDTH 64 | |
fe4d7e2c | 373 | #define DEFAULT_LCD_CHARSET LCD_CHARSET_NORMAL |
7005b584 WT |
374 | #define DEFAULT_LCD_PROTO LCD_PROTO_PARALLEL |
375 | ||
376 | #define DEFAULT_LCD_PIN_E PIN_AUTOLF | |
377 | #define DEFAULT_LCD_PIN_RS PIN_SELECP | |
378 | #define DEFAULT_LCD_PIN_RW PIN_INITP | |
379 | #define DEFAULT_LCD_PIN_SCL PIN_STROBE | |
380 | #define DEFAULT_LCD_PIN_SDA PIN_D0 | |
381 | #define DEFAULT_LCD_PIN_BL PIN_NOT_SET | |
7005b584 | 382 | |
7005b584 WT |
383 | #ifdef CONFIG_PANEL_PARPORT |
384 | #undef DEFAULT_PARPORT | |
385 | #define DEFAULT_PARPORT CONFIG_PANEL_PARPORT | |
386 | #endif | |
387 | ||
1e13e8aa MG |
388 | #ifdef CONFIG_PANEL_PROFILE |
389 | #undef DEFAULT_PROFILE | |
390 | #define DEFAULT_PROFILE CONFIG_PANEL_PROFILE | |
391 | #endif | |
392 | ||
698b1515 | 393 | #if DEFAULT_PROFILE == 0 /* custom */ |
7005b584 | 394 | #ifdef CONFIG_PANEL_KEYPAD |
98fac3d3 MG |
395 | #undef DEFAULT_KEYPAD_TYPE |
396 | #define DEFAULT_KEYPAD_TYPE CONFIG_PANEL_KEYPAD | |
7005b584 WT |
397 | #endif |
398 | ||
7005b584 | 399 | #ifdef CONFIG_PANEL_LCD |
98fac3d3 MG |
400 | #undef DEFAULT_LCD_TYPE |
401 | #define DEFAULT_LCD_TYPE CONFIG_PANEL_LCD | |
7005b584 WT |
402 | #endif |
403 | ||
1e13e8aa MG |
404 | #ifdef CONFIG_PANEL_LCD_HEIGHT |
405 | #undef DEFAULT_LCD_HEIGHT | |
406 | #define DEFAULT_LCD_HEIGHT CONFIG_PANEL_LCD_HEIGHT | |
407 | #endif | |
408 | ||
7005b584 WT |
409 | #ifdef CONFIG_PANEL_LCD_WIDTH |
410 | #undef DEFAULT_LCD_WIDTH | |
411 | #define DEFAULT_LCD_WIDTH CONFIG_PANEL_LCD_WIDTH | |
412 | #endif | |
413 | ||
414 | #ifdef CONFIG_PANEL_LCD_BWIDTH | |
415 | #undef DEFAULT_LCD_BWIDTH | |
416 | #define DEFAULT_LCD_BWIDTH CONFIG_PANEL_LCD_BWIDTH | |
417 | #endif | |
418 | ||
419 | #ifdef CONFIG_PANEL_LCD_HWIDTH | |
420 | #undef DEFAULT_LCD_HWIDTH | |
421 | #define DEFAULT_LCD_HWIDTH CONFIG_PANEL_LCD_HWIDTH | |
422 | #endif | |
423 | ||
1e13e8aa MG |
424 | #ifdef CONFIG_PANEL_LCD_CHARSET |
425 | #undef DEFAULT_LCD_CHARSET | |
426 | #define DEFAULT_LCD_CHARSET CONFIG_PANEL_LCD_CHARSET | |
7005b584 WT |
427 | #endif |
428 | ||
429 | #ifdef CONFIG_PANEL_LCD_PROTO | |
430 | #undef DEFAULT_LCD_PROTO | |
431 | #define DEFAULT_LCD_PROTO CONFIG_PANEL_LCD_PROTO | |
432 | #endif | |
433 | ||
434 | #ifdef CONFIG_PANEL_LCD_PIN_E | |
435 | #undef DEFAULT_LCD_PIN_E | |
436 | #define DEFAULT_LCD_PIN_E CONFIG_PANEL_LCD_PIN_E | |
437 | #endif | |
438 | ||
439 | #ifdef CONFIG_PANEL_LCD_PIN_RS | |
440 | #undef DEFAULT_LCD_PIN_RS | |
441 | #define DEFAULT_LCD_PIN_RS CONFIG_PANEL_LCD_PIN_RS | |
442 | #endif | |
443 | ||
444 | #ifdef CONFIG_PANEL_LCD_PIN_RW | |
445 | #undef DEFAULT_LCD_PIN_RW | |
446 | #define DEFAULT_LCD_PIN_RW CONFIG_PANEL_LCD_PIN_RW | |
447 | #endif | |
448 | ||
449 | #ifdef CONFIG_PANEL_LCD_PIN_SCL | |
450 | #undef DEFAULT_LCD_PIN_SCL | |
451 | #define DEFAULT_LCD_PIN_SCL CONFIG_PANEL_LCD_PIN_SCL | |
452 | #endif | |
453 | ||
454 | #ifdef CONFIG_PANEL_LCD_PIN_SDA | |
455 | #undef DEFAULT_LCD_PIN_SDA | |
456 | #define DEFAULT_LCD_PIN_SDA CONFIG_PANEL_LCD_PIN_SDA | |
457 | #endif | |
458 | ||
459 | #ifdef CONFIG_PANEL_LCD_PIN_BL | |
460 | #undef DEFAULT_LCD_PIN_BL | |
461 | #define DEFAULT_LCD_PIN_BL CONFIG_PANEL_LCD_PIN_BL | |
462 | #endif | |
463 | ||
7005b584 WT |
464 | #endif /* DEFAULT_PROFILE == 0 */ |
465 | ||
466 | /* global variables */ | |
f4757af8 MG |
467 | |
468 | /* Device single-open policy control */ | |
469 | static atomic_t lcd_available = ATOMIC_INIT(1); | |
470 | static atomic_t keypad_available = ATOMIC_INIT(1); | |
471 | ||
698b1515 | 472 | static struct pardevice *pprt; |
7005b584 | 473 | |
f6d1fcfe | 474 | static int keypad_initialized; |
7005b584 | 475 | |
68d386bf MA |
476 | static void (*lcd_write_cmd)(int); |
477 | static void (*lcd_write_data)(int); | |
478 | static void (*lcd_clear_fast)(void); | |
7005b584 | 479 | |
698b1515 | 480 | static DEFINE_SPINLOCK(pprt_lock); |
7005b584 WT |
481 | static struct timer_list scan_timer; |
482 | ||
63023177 | 483 | MODULE_DESCRIPTION("Generic parallel port LCD/Keypad driver"); |
f6d1fcfe | 484 | |
59a66a24 | 485 | static int parport = DEFAULT_PARPORT; |
698b1515 WT |
486 | module_param(parport, int, 0000); |
487 | MODULE_PARM_DESC(parport, "Parallel port index (0=lpt1, 1=lpt2, ...)"); | |
f6d1fcfe | 488 | |
98e0e762 MG |
489 | static int profile = DEFAULT_PROFILE; |
490 | module_param(profile, int, 0000); | |
491 | MODULE_PARM_DESC(profile, | |
492 | "1=16x2 old kp; 2=serial 16x2, new kp; 3=16x2 hantronix; " | |
493 | "4=16x2 nexcom; default=40x2, old kp"); | |
494 | ||
36277d4a | 495 | static int keypad_type = NOT_SET; |
98e0e762 MG |
496 | module_param(keypad_type, int, 0000); |
497 | MODULE_PARM_DESC(keypad_type, | |
498 | "Keypad type: 0=none, 1=old 6 keys, 2=new 6+1 keys, 3=nexcom 4 keys"); | |
499 | ||
36277d4a | 500 | static int lcd_type = NOT_SET; |
98e0e762 MG |
501 | module_param(lcd_type, int, 0000); |
502 | MODULE_PARM_DESC(lcd_type, | |
2c20d92d | 503 | "LCD type: 0=none, 1=compiled-in, 2=old, 3=serial ks0074, 4=hantronix, 5=nexcom"); |
98e0e762 | 504 | |
36277d4a | 505 | static int lcd_height = NOT_SET; |
698b1515 WT |
506 | module_param(lcd_height, int, 0000); |
507 | MODULE_PARM_DESC(lcd_height, "Number of lines on the LCD"); | |
f6d1fcfe | 508 | |
36277d4a | 509 | static int lcd_width = NOT_SET; |
698b1515 WT |
510 | module_param(lcd_width, int, 0000); |
511 | MODULE_PARM_DESC(lcd_width, "Number of columns on the LCD"); | |
f6d1fcfe | 512 | |
36277d4a | 513 | static int lcd_bwidth = NOT_SET; /* internal buffer width (usually 40) */ |
698b1515 WT |
514 | module_param(lcd_bwidth, int, 0000); |
515 | MODULE_PARM_DESC(lcd_bwidth, "Internal LCD line width (40)"); | |
f6d1fcfe | 516 | |
36277d4a | 517 | static int lcd_hwidth = NOT_SET; /* hardware buffer width (usually 64) */ |
698b1515 WT |
518 | module_param(lcd_hwidth, int, 0000); |
519 | MODULE_PARM_DESC(lcd_hwidth, "LCD line hardware address (64)"); | |
f6d1fcfe | 520 | |
36277d4a | 521 | static int lcd_charset = NOT_SET; |
98e0e762 MG |
522 | module_param(lcd_charset, int, 0000); |
523 | MODULE_PARM_DESC(lcd_charset, "LCD character set: 0=standard, 1=KS0074"); | |
f6d1fcfe | 524 | |
36277d4a | 525 | static int lcd_proto = NOT_SET; |
698b1515 | 526 | module_param(lcd_proto, int, 0000); |
429ccf05 | 527 | MODULE_PARM_DESC(lcd_proto, |
fdf4a494 | 528 | "LCD communication: 0=parallel (//), 1=serial, 2=TI LCD Interface"); |
f6d1fcfe | 529 | |
f6d1fcfe WT |
530 | /* |
531 | * These are the parallel port pins the LCD control signals are connected to. | |
532 | * Set this to 0 if the signal is not used. Set it to its opposite value | |
533 | * (negative) if the signal is negated. -MAXINT is used to indicate that the | |
534 | * pin has not been explicitly specified. | |
535 | * | |
63023177 | 536 | * WARNING! no check will be performed about collisions with keypad ! |
f6d1fcfe WT |
537 | */ |
538 | ||
539 | static int lcd_e_pin = PIN_NOT_SET; | |
698b1515 WT |
540 | module_param(lcd_e_pin, int, 0000); |
541 | MODULE_PARM_DESC(lcd_e_pin, | |
fe5d2e01 | 542 | "# of the // port pin connected to LCD 'E' signal, with polarity (-17..17)"); |
f6d1fcfe WT |
543 | |
544 | static int lcd_rs_pin = PIN_NOT_SET; | |
698b1515 WT |
545 | module_param(lcd_rs_pin, int, 0000); |
546 | MODULE_PARM_DESC(lcd_rs_pin, | |
fe5d2e01 | 547 | "# of the // port pin connected to LCD 'RS' signal, with polarity (-17..17)"); |
f6d1fcfe WT |
548 | |
549 | static int lcd_rw_pin = PIN_NOT_SET; | |
698b1515 WT |
550 | module_param(lcd_rw_pin, int, 0000); |
551 | MODULE_PARM_DESC(lcd_rw_pin, | |
fe5d2e01 | 552 | "# of the // port pin connected to LCD 'RW' signal, with polarity (-17..17)"); |
f6d1fcfe | 553 | |
98e0e762 MG |
554 | static int lcd_cl_pin = PIN_NOT_SET; |
555 | module_param(lcd_cl_pin, int, 0000); | |
556 | MODULE_PARM_DESC(lcd_cl_pin, | |
557 | "# of the // port pin connected to serial LCD 'SCL' signal, with polarity (-17..17)"); | |
f6d1fcfe WT |
558 | |
559 | static int lcd_da_pin = PIN_NOT_SET; | |
698b1515 WT |
560 | module_param(lcd_da_pin, int, 0000); |
561 | MODULE_PARM_DESC(lcd_da_pin, | |
fe5d2e01 | 562 | "# of the // port pin connected to serial LCD 'SDA' signal, with polarity (-17..17)"); |
f6d1fcfe | 563 | |
98e0e762 MG |
564 | static int lcd_bl_pin = PIN_NOT_SET; |
565 | module_param(lcd_bl_pin, int, 0000); | |
566 | MODULE_PARM_DESC(lcd_bl_pin, | |
567 | "# of the // port pin connected to LCD backlight, with polarity (-17..17)"); | |
568 | ||
569 | /* Deprecated module parameters - consider not using them anymore */ | |
570 | ||
36277d4a | 571 | static int lcd_enabled = NOT_SET; |
98e0e762 MG |
572 | module_param(lcd_enabled, int, 0000); |
573 | MODULE_PARM_DESC(lcd_enabled, "Deprecated option, use lcd_type instead"); | |
574 | ||
36277d4a | 575 | static int keypad_enabled = NOT_SET; |
98e0e762 MG |
576 | module_param(keypad_enabled, int, 0000); |
577 | MODULE_PARM_DESC(keypad_enabled, "Deprecated option, use keypad_type instead"); | |
578 | ||
36d2041a | 579 | static const unsigned char *lcd_char_conv; |
7005b584 WT |
580 | |
581 | /* for some LCD drivers (ks0074) we need a charset conversion table. */ | |
36d2041a | 582 | static const unsigned char lcd_char_conv_ks0074[256] = { |
698b1515 WT |
583 | /* 0|8 1|9 2|A 3|B 4|C 5|D 6|E 7|F */ |
584 | /* 0x00 */ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, | |
585 | /* 0x08 */ 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, | |
586 | /* 0x10 */ 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, | |
587 | /* 0x18 */ 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, | |
588 | /* 0x20 */ 0x20, 0x21, 0x22, 0x23, 0xa2, 0x25, 0x26, 0x27, | |
589 | /* 0x28 */ 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, | |
590 | /* 0x30 */ 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, | |
591 | /* 0x38 */ 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, | |
592 | /* 0x40 */ 0xa0, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, | |
593 | /* 0x48 */ 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, | |
594 | /* 0x50 */ 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, | |
595 | /* 0x58 */ 0x58, 0x59, 0x5a, 0xfa, 0xfb, 0xfc, 0x1d, 0xc4, | |
596 | /* 0x60 */ 0x96, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, | |
597 | /* 0x68 */ 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, | |
598 | /* 0x70 */ 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, | |
599 | /* 0x78 */ 0x78, 0x79, 0x7a, 0xfd, 0xfe, 0xff, 0xce, 0x20, | |
600 | /* 0x80 */ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, | |
601 | /* 0x88 */ 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, | |
602 | /* 0x90 */ 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, | |
603 | /* 0x98 */ 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, | |
604 | /* 0xA0 */ 0x20, 0x40, 0xb1, 0xa1, 0x24, 0xa3, 0xfe, 0x5f, | |
605 | /* 0xA8 */ 0x22, 0xc8, 0x61, 0x14, 0x97, 0x2d, 0xad, 0x96, | |
606 | /* 0xB0 */ 0x80, 0x8c, 0x82, 0x83, 0x27, 0x8f, 0x86, 0xdd, | |
607 | /* 0xB8 */ 0x2c, 0x81, 0x6f, 0x15, 0x8b, 0x8a, 0x84, 0x60, | |
608 | /* 0xC0 */ 0xe2, 0xe2, 0xe2, 0x5b, 0x5b, 0xae, 0xbc, 0xa9, | |
609 | /* 0xC8 */ 0xc5, 0xbf, 0xc6, 0xf1, 0xe3, 0xe3, 0xe3, 0xe3, | |
610 | /* 0xD0 */ 0x44, 0x5d, 0xa8, 0xe4, 0xec, 0xec, 0x5c, 0x78, | |
611 | /* 0xD8 */ 0xab, 0xa6, 0xe5, 0x5e, 0x5e, 0xe6, 0xaa, 0xbe, | |
612 | /* 0xE0 */ 0x7f, 0xe7, 0xaf, 0x7b, 0x7b, 0xaf, 0xbd, 0xc8, | |
613 | /* 0xE8 */ 0xa4, 0xa5, 0xc7, 0xf6, 0xa7, 0xe8, 0x69, 0x69, | |
614 | /* 0xF0 */ 0xed, 0x7d, 0xa8, 0xe4, 0xec, 0x5c, 0x5c, 0x25, | |
615 | /* 0xF8 */ 0xac, 0xa6, 0xea, 0xef, 0x7e, 0xeb, 0xb2, 0x79, | |
7005b584 WT |
616 | }; |
617 | ||
36d2041a | 618 | static const char old_keypad_profile[][4][9] = { |
698b1515 WT |
619 | {"S0", "Left\n", "Left\n", ""}, |
620 | {"S1", "Down\n", "Down\n", ""}, | |
621 | {"S2", "Up\n", "Up\n", ""}, | |
622 | {"S3", "Right\n", "Right\n", ""}, | |
623 | {"S4", "Esc\n", "Esc\n", ""}, | |
624 | {"S5", "Ret\n", "Ret\n", ""}, | |
625 | {"", "", "", ""} | |
7005b584 WT |
626 | }; |
627 | ||
628 | /* signals, press, repeat, release */ | |
36d2041a | 629 | static const char new_keypad_profile[][4][9] = { |
698b1515 WT |
630 | {"S0", "Left\n", "Left\n", ""}, |
631 | {"S1", "Down\n", "Down\n", ""}, | |
632 | {"S2", "Up\n", "Up\n", ""}, | |
633 | {"S3", "Right\n", "Right\n", ""}, | |
634 | {"S4s5", "", "Esc\n", "Esc\n"}, | |
635 | {"s4S5", "", "Ret\n", "Ret\n"}, | |
636 | {"S4S5", "Help\n", "", ""}, | |
637 | /* add new signals above this line */ | |
638 | {"", "", "", ""} | |
7005b584 WT |
639 | }; |
640 | ||
641 | /* signals, press, repeat, release */ | |
36d2041a | 642 | static const char nexcom_keypad_profile[][4][9] = { |
698b1515 WT |
643 | {"a-p-e-", "Down\n", "Down\n", ""}, |
644 | {"a-p-E-", "Ret\n", "Ret\n", ""}, | |
645 | {"a-P-E-", "Esc\n", "Esc\n", ""}, | |
646 | {"a-P-e-", "Up\n", "Up\n", ""}, | |
647 | /* add new signals above this line */ | |
648 | {"", "", "", ""} | |
7005b584 WT |
649 | }; |
650 | ||
36d2041a | 651 | static const char (*keypad_profile)[4][9] = old_keypad_profile; |
7005b584 WT |
652 | |
653 | /* FIXME: this should be converted to a bit array containing signals states */ | |
654 | static struct { | |
429ccf05 HH |
655 | unsigned char e; /* parallel LCD E (data latch on falling edge) */ |
656 | unsigned char rs; /* parallel LCD RS (0 = cmd, 1 = data) */ | |
657 | unsigned char rw; /* parallel LCD R/W (0 = W, 1 = R) */ | |
658 | unsigned char bl; /* parallel LCD backlight (0 = off, 1 = on) */ | |
659 | unsigned char cl; /* serial LCD clock (latch on rising edge) */ | |
660 | unsigned char da; /* serial LCD data */ | |
7005b584 WT |
661 | } bits; |
662 | ||
663 | static void init_scan_timer(void); | |
664 | ||
665 | /* sets data port bits according to current signals values */ | |
698b1515 WT |
666 | static int set_data_bits(void) |
667 | { | |
668 | int val, bit; | |
669 | ||
670 | val = r_dtr(pprt); | |
671 | for (bit = 0; bit < LCD_BITS; bit++) | |
672 | val &= lcd_bits[LCD_PORT_D][bit][BIT_MSK]; | |
673 | ||
674 | val |= lcd_bits[LCD_PORT_D][LCD_BIT_E][bits.e] | |
675 | | lcd_bits[LCD_PORT_D][LCD_BIT_RS][bits.rs] | |
676 | | lcd_bits[LCD_PORT_D][LCD_BIT_RW][bits.rw] | |
677 | | lcd_bits[LCD_PORT_D][LCD_BIT_BL][bits.bl] | |
678 | | lcd_bits[LCD_PORT_D][LCD_BIT_CL][bits.cl] | |
679 | | lcd_bits[LCD_PORT_D][LCD_BIT_DA][bits.da]; | |
680 | ||
681 | w_dtr(pprt, val); | |
682 | return val; | |
7005b584 WT |
683 | } |
684 | ||
685 | /* sets ctrl port bits according to current signals values */ | |
698b1515 WT |
686 | static int set_ctrl_bits(void) |
687 | { | |
688 | int val, bit; | |
689 | ||
690 | val = r_ctr(pprt); | |
691 | for (bit = 0; bit < LCD_BITS; bit++) | |
692 | val &= lcd_bits[LCD_PORT_C][bit][BIT_MSK]; | |
693 | ||
694 | val |= lcd_bits[LCD_PORT_C][LCD_BIT_E][bits.e] | |
695 | | lcd_bits[LCD_PORT_C][LCD_BIT_RS][bits.rs] | |
696 | | lcd_bits[LCD_PORT_C][LCD_BIT_RW][bits.rw] | |
697 | | lcd_bits[LCD_PORT_C][LCD_BIT_BL][bits.bl] | |
698 | | lcd_bits[LCD_PORT_C][LCD_BIT_CL][bits.cl] | |
699 | | lcd_bits[LCD_PORT_C][LCD_BIT_DA][bits.da]; | |
700 | ||
701 | w_ctr(pprt, val); | |
702 | return val; | |
7005b584 WT |
703 | } |
704 | ||
705 | /* sets ctrl & data port bits according to current signals values */ | |
6136ac86 | 706 | static void panel_set_bits(void) |
698b1515 WT |
707 | { |
708 | set_data_bits(); | |
709 | set_ctrl_bits(); | |
7005b584 WT |
710 | } |
711 | ||
712 | /* | |
713 | * Converts a parallel port pin (from -25 to 25) to data and control ports | |
714 | * masks, and data and control port bits. The signal will be considered | |
715 | * unconnected if it's on pin 0 or an invalid pin (<-25 or >25). | |
716 | * | |
717 | * Result will be used this way : | |
718 | * out(dport, in(dport) & d_val[2] | d_val[signal_state]) | |
719 | * out(cport, in(cport) & c_val[2] | c_val[signal_state]) | |
720 | */ | |
36d2041a | 721 | static void pin_to_bits(int pin, unsigned char *d_val, unsigned char *c_val) |
698b1515 WT |
722 | { |
723 | int d_bit, c_bit, inv; | |
724 | ||
2d53426b DB |
725 | d_val[0] = 0; |
726 | c_val[0] = 0; | |
727 | d_val[1] = 0; | |
728 | c_val[1] = 0; | |
729 | d_val[2] = 0xFF; | |
730 | c_val[2] = 0xFF; | |
698b1515 WT |
731 | |
732 | if (pin == 0) | |
733 | return; | |
734 | ||
735 | inv = (pin < 0); | |
736 | if (inv) | |
737 | pin = -pin; | |
738 | ||
2d53426b DB |
739 | d_bit = 0; |
740 | c_bit = 0; | |
698b1515 WT |
741 | |
742 | switch (pin) { | |
743 | case PIN_STROBE: /* strobe, inverted */ | |
744 | c_bit = PNL_PSTROBE; | |
745 | inv = !inv; | |
746 | break; | |
747 | case PIN_D0...PIN_D7: /* D0 - D7 = 2 - 9 */ | |
748 | d_bit = 1 << (pin - 2); | |
749 | break; | |
750 | case PIN_AUTOLF: /* autofeed, inverted */ | |
751 | c_bit = PNL_PAUTOLF; | |
752 | inv = !inv; | |
753 | break; | |
429ccf05 | 754 | case PIN_INITP: /* init, direct */ |
698b1515 WT |
755 | c_bit = PNL_PINITP; |
756 | break; | |
757 | case PIN_SELECP: /* select_in, inverted */ | |
758 | c_bit = PNL_PSELECP; | |
759 | inv = !inv; | |
760 | break; | |
761 | default: /* unknown pin, ignore */ | |
762 | break; | |
763 | } | |
764 | ||
765 | if (c_bit) { | |
766 | c_val[2] &= ~c_bit; | |
767 | c_val[!inv] = c_bit; | |
768 | } else if (d_bit) { | |
769 | d_val[2] &= ~d_bit; | |
770 | d_val[!inv] = d_bit; | |
771 | } | |
7005b584 WT |
772 | } |
773 | ||
774 | /* sleeps that many milliseconds with a reschedule */ | |
698b1515 WT |
775 | static void long_sleep(int ms) |
776 | { | |
895875a3 | 777 | if (in_interrupt()) |
698b1515 | 778 | mdelay(ms); |
895875a3 NMG |
779 | else |
780 | schedule_timeout_interruptible(msecs_to_jiffies(ms)); | |
698b1515 | 781 | } |
7005b584 | 782 | |
881bf281 AW |
783 | /* |
784 | * send a serial byte to the LCD panel. The caller is responsible for locking | |
785 | * if needed. | |
786 | */ | |
698b1515 WT |
787 | static void lcd_send_serial(int byte) |
788 | { | |
789 | int bit; | |
790 | ||
881bf281 AW |
791 | /* |
792 | * the data bit is set on D0, and the clock on STROBE. | |
793 | * LCD reads D0 on STROBE's rising edge. | |
794 | */ | |
698b1515 WT |
795 | for (bit = 0; bit < 8; bit++) { |
796 | bits.cl = BIT_CLR; /* CLK low */ | |
6136ac86 | 797 | panel_set_bits(); |
698b1515 | 798 | bits.da = byte & 1; |
6136ac86 | 799 | panel_set_bits(); |
429ccf05 | 800 | udelay(2); /* maintain the data during 2 us before CLK up */ |
698b1515 | 801 | bits.cl = BIT_SET; /* CLK high */ |
6136ac86 | 802 | panel_set_bits(); |
429ccf05 | 803 | udelay(1); /* maintain the strobe during 1 us */ |
698b1515 WT |
804 | byte >>= 1; |
805 | } | |
7005b584 WT |
806 | } |
807 | ||
808 | /* turn the backlight on or off */ | |
698b1515 WT |
809 | static void lcd_backlight(int on) |
810 | { | |
8037e2a3 | 811 | if (lcd.pins.bl == PIN_NONE) |
698b1515 WT |
812 | return; |
813 | ||
6975e183 | 814 | /* The backlight is activated by setting the AUTOFEED line to +5V */ |
d4d2dbca | 815 | spin_lock_irq(&pprt_lock); |
698b1515 | 816 | bits.bl = on; |
6136ac86 | 817 | panel_set_bits(); |
d4d2dbca | 818 | spin_unlock_irq(&pprt_lock); |
7005b584 WT |
819 | } |
820 | ||
821 | /* send a command to the LCD panel in serial mode */ | |
698b1515 WT |
822 | static void lcd_write_cmd_s(int cmd) |
823 | { | |
d4d2dbca | 824 | spin_lock_irq(&pprt_lock); |
698b1515 WT |
825 | lcd_send_serial(0x1F); /* R/W=W, RS=0 */ |
826 | lcd_send_serial(cmd & 0x0F); | |
827 | lcd_send_serial((cmd >> 4) & 0x0F); | |
b64a1cbe | 828 | udelay(40); /* the shortest command takes at least 40 us */ |
d4d2dbca | 829 | spin_unlock_irq(&pprt_lock); |
7005b584 WT |
830 | } |
831 | ||
832 | /* send data to the LCD panel in serial mode */ | |
698b1515 WT |
833 | static void lcd_write_data_s(int data) |
834 | { | |
d4d2dbca | 835 | spin_lock_irq(&pprt_lock); |
698b1515 WT |
836 | lcd_send_serial(0x5F); /* R/W=W, RS=1 */ |
837 | lcd_send_serial(data & 0x0F); | |
838 | lcd_send_serial((data >> 4) & 0x0F); | |
b64a1cbe | 839 | udelay(40); /* the shortest data takes at least 40 us */ |
d4d2dbca | 840 | spin_unlock_irq(&pprt_lock); |
7005b584 WT |
841 | } |
842 | ||
843 | /* send a command to the LCD panel in 8 bits parallel mode */ | |
698b1515 WT |
844 | static void lcd_write_cmd_p8(int cmd) |
845 | { | |
d4d2dbca | 846 | spin_lock_irq(&pprt_lock); |
698b1515 WT |
847 | /* present the data to the data port */ |
848 | w_dtr(pprt, cmd); | |
b64a1cbe | 849 | udelay(20); /* maintain the data during 20 us before the strobe */ |
7005b584 | 850 | |
698b1515 WT |
851 | bits.e = BIT_SET; |
852 | bits.rs = BIT_CLR; | |
853 | bits.rw = BIT_CLR; | |
854 | set_ctrl_bits(); | |
7005b584 | 855 | |
b64a1cbe | 856 | udelay(40); /* maintain the strobe during 40 us */ |
7005b584 | 857 | |
698b1515 WT |
858 | bits.e = BIT_CLR; |
859 | set_ctrl_bits(); | |
7005b584 | 860 | |
b64a1cbe | 861 | udelay(120); /* the shortest command takes at least 120 us */ |
d4d2dbca | 862 | spin_unlock_irq(&pprt_lock); |
7005b584 WT |
863 | } |
864 | ||
865 | /* send data to the LCD panel in 8 bits parallel mode */ | |
698b1515 WT |
866 | static void lcd_write_data_p8(int data) |
867 | { | |
d4d2dbca | 868 | spin_lock_irq(&pprt_lock); |
698b1515 WT |
869 | /* present the data to the data port */ |
870 | w_dtr(pprt, data); | |
b64a1cbe | 871 | udelay(20); /* maintain the data during 20 us before the strobe */ |
7005b584 | 872 | |
698b1515 WT |
873 | bits.e = BIT_SET; |
874 | bits.rs = BIT_SET; | |
875 | bits.rw = BIT_CLR; | |
876 | set_ctrl_bits(); | |
7005b584 | 877 | |
b64a1cbe | 878 | udelay(40); /* maintain the strobe during 40 us */ |
7005b584 | 879 | |
698b1515 WT |
880 | bits.e = BIT_CLR; |
881 | set_ctrl_bits(); | |
7005b584 | 882 | |
b64a1cbe | 883 | udelay(45); /* the shortest data takes at least 45 us */ |
d4d2dbca | 884 | spin_unlock_irq(&pprt_lock); |
7005b584 WT |
885 | } |
886 | ||
77943d31 SR |
887 | /* send a command to the TI LCD panel */ |
888 | static void lcd_write_cmd_tilcd(int cmd) | |
889 | { | |
d4d2dbca | 890 | spin_lock_irq(&pprt_lock); |
77943d31 SR |
891 | /* present the data to the control port */ |
892 | w_ctr(pprt, cmd); | |
b64a1cbe | 893 | udelay(60); |
d4d2dbca | 894 | spin_unlock_irq(&pprt_lock); |
77943d31 SR |
895 | } |
896 | ||
897 | /* send data to the TI LCD panel */ | |
898 | static void lcd_write_data_tilcd(int data) | |
899 | { | |
d4d2dbca | 900 | spin_lock_irq(&pprt_lock); |
77943d31 SR |
901 | /* present the data to the data port */ |
902 | w_dtr(pprt, data); | |
b64a1cbe | 903 | udelay(60); |
d4d2dbca | 904 | spin_unlock_irq(&pprt_lock); |
77943d31 SR |
905 | } |
906 | ||
698b1515 WT |
907 | static void lcd_gotoxy(void) |
908 | { | |
2114924a | 909 | lcd_write_cmd(LCD_CMD_SET_DDRAM_ADDR |
6d8b588c | 910 | | (lcd.addr.y ? lcd.hwidth : 0) |
8c17893c NB |
911 | /* |
912 | * we force the cursor to stay at the end of the | |
913 | * line if it wants to go farther | |
914 | */ | |
6d8b588c | 915 | | ((lcd.addr.x < lcd.bwidth) ? lcd.addr.x & |
8037e2a3 | 916 | (lcd.hwidth - 1) : lcd.bwidth - 1)); |
7005b584 WT |
917 | } |
918 | ||
698b1515 WT |
919 | static void lcd_print(char c) |
920 | { | |
6d8b588c | 921 | if (lcd.addr.x < lcd.bwidth) { |
b565b3fb | 922 | if (lcd_char_conv) |
698b1515 WT |
923 | c = lcd_char_conv[(unsigned char)c]; |
924 | lcd_write_data(c); | |
6d8b588c | 925 | lcd.addr.x++; |
698b1515 WT |
926 | } |
927 | /* prevents the cursor from wrapping onto the next line */ | |
6d8b588c | 928 | if (lcd.addr.x == lcd.bwidth) |
698b1515 | 929 | lcd_gotoxy(); |
7005b584 WT |
930 | } |
931 | ||
932 | /* fills the display with spaces and resets X/Y */ | |
698b1515 WT |
933 | static void lcd_clear_fast_s(void) |
934 | { | |
935 | int pos; | |
c3ed0afc | 936 | |
6d8b588c MG |
937 | lcd.addr.x = 0; |
938 | lcd.addr.y = 0; | |
698b1515 WT |
939 | lcd_gotoxy(); |
940 | ||
d4d2dbca | 941 | spin_lock_irq(&pprt_lock); |
8037e2a3 | 942 | for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) { |
698b1515 WT |
943 | lcd_send_serial(0x5F); /* R/W=W, RS=1 */ |
944 | lcd_send_serial(' ' & 0x0F); | |
945 | lcd_send_serial((' ' >> 4) & 0x0F); | |
b64a1cbe | 946 | udelay(40); /* the shortest data takes at least 40 us */ |
698b1515 | 947 | } |
d4d2dbca | 948 | spin_unlock_irq(&pprt_lock); |
698b1515 | 949 | |
6d8b588c MG |
950 | lcd.addr.x = 0; |
951 | lcd.addr.y = 0; | |
698b1515 | 952 | lcd_gotoxy(); |
7005b584 WT |
953 | } |
954 | ||
955 | /* fills the display with spaces and resets X/Y */ | |
698b1515 WT |
956 | static void lcd_clear_fast_p8(void) |
957 | { | |
958 | int pos; | |
c3ed0afc | 959 | |
6d8b588c MG |
960 | lcd.addr.x = 0; |
961 | lcd.addr.y = 0; | |
698b1515 | 962 | lcd_gotoxy(); |
7005b584 | 963 | |
d4d2dbca | 964 | spin_lock_irq(&pprt_lock); |
8037e2a3 | 965 | for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) { |
698b1515 WT |
966 | /* present the data to the data port */ |
967 | w_dtr(pprt, ' '); | |
429ccf05 HH |
968 | |
969 | /* maintain the data during 20 us before the strobe */ | |
b64a1cbe | 970 | udelay(20); |
7005b584 | 971 | |
698b1515 WT |
972 | bits.e = BIT_SET; |
973 | bits.rs = BIT_SET; | |
974 | bits.rw = BIT_CLR; | |
975 | set_ctrl_bits(); | |
7005b584 | 976 | |
429ccf05 | 977 | /* maintain the strobe during 40 us */ |
b64a1cbe | 978 | udelay(40); |
7005b584 | 979 | |
698b1515 WT |
980 | bits.e = BIT_CLR; |
981 | set_ctrl_bits(); | |
7005b584 | 982 | |
429ccf05 | 983 | /* the shortest data takes at least 45 us */ |
b64a1cbe | 984 | udelay(45); |
698b1515 | 985 | } |
d4d2dbca | 986 | spin_unlock_irq(&pprt_lock); |
7005b584 | 987 | |
6d8b588c MG |
988 | lcd.addr.x = 0; |
989 | lcd.addr.y = 0; | |
698b1515 | 990 | lcd_gotoxy(); |
7005b584 WT |
991 | } |
992 | ||
77943d31 SR |
993 | /* fills the display with spaces and resets X/Y */ |
994 | static void lcd_clear_fast_tilcd(void) | |
995 | { | |
996 | int pos; | |
c3ed0afc | 997 | |
6d8b588c MG |
998 | lcd.addr.x = 0; |
999 | lcd.addr.y = 0; | |
77943d31 SR |
1000 | lcd_gotoxy(); |
1001 | ||
d4d2dbca | 1002 | spin_lock_irq(&pprt_lock); |
8037e2a3 | 1003 | for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) { |
77943d31 SR |
1004 | /* present the data to the data port */ |
1005 | w_dtr(pprt, ' '); | |
b64a1cbe | 1006 | udelay(60); |
77943d31 SR |
1007 | } |
1008 | ||
d4d2dbca | 1009 | spin_unlock_irq(&pprt_lock); |
77943d31 | 1010 | |
6d8b588c MG |
1011 | lcd.addr.x = 0; |
1012 | lcd.addr.y = 0; | |
77943d31 SR |
1013 | lcd_gotoxy(); |
1014 | } | |
1015 | ||
7005b584 | 1016 | /* clears the display and resets X/Y */ |
698b1515 WT |
1017 | static void lcd_clear_display(void) |
1018 | { | |
2114924a | 1019 | lcd_write_cmd(LCD_CMD_DISPLAY_CLEAR); |
6d8b588c MG |
1020 | lcd.addr.x = 0; |
1021 | lcd.addr.y = 0; | |
698b1515 WT |
1022 | /* we must wait a few milliseconds (15) */ |
1023 | long_sleep(15); | |
7005b584 WT |
1024 | } |
1025 | ||
698b1515 WT |
1026 | static void lcd_init_display(void) |
1027 | { | |
6d8b588c | 1028 | lcd.flags = ((lcd.height > 1) ? LCD_FLAG_N : 0) |
698b1515 | 1029 | | LCD_FLAG_D | LCD_FLAG_C | LCD_FLAG_B; |
7005b584 | 1030 | |
698b1515 | 1031 | long_sleep(20); /* wait 20 ms after power-up for the paranoid */ |
7005b584 | 1032 | |
2114924a MG |
1033 | /* 8bits, 1 line, small fonts; let's do it 3 times */ |
1034 | lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS); | |
698b1515 | 1035 | long_sleep(10); |
2114924a | 1036 | lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS); |
698b1515 | 1037 | long_sleep(10); |
2114924a | 1038 | lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS); |
698b1515 | 1039 | long_sleep(10); |
7005b584 | 1040 | |
2114924a MG |
1041 | /* set font height and lines number */ |
1042 | lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS | |
1043 | | ((lcd.flags & LCD_FLAG_F) ? LCD_CMD_FONT_5X10_DOTS : 0) | |
1044 | | ((lcd.flags & LCD_FLAG_N) ? LCD_CMD_TWO_LINES : 0) | |
698b1515 WT |
1045 | ); |
1046 | long_sleep(10); | |
7005b584 | 1047 | |
2114924a MG |
1048 | /* display off, cursor off, blink off */ |
1049 | lcd_write_cmd(LCD_CMD_DISPLAY_CTRL); | |
698b1515 | 1050 | long_sleep(10); |
7005b584 | 1051 | |
2114924a MG |
1052 | lcd_write_cmd(LCD_CMD_DISPLAY_CTRL /* set display mode */ |
1053 | | ((lcd.flags & LCD_FLAG_D) ? LCD_CMD_DISPLAY_ON : 0) | |
1054 | | ((lcd.flags & LCD_FLAG_C) ? LCD_CMD_CURSOR_ON : 0) | |
1055 | | ((lcd.flags & LCD_FLAG_B) ? LCD_CMD_BLINK_ON : 0) | |
698b1515 | 1056 | ); |
7005b584 | 1057 | |
6d8b588c | 1058 | lcd_backlight((lcd.flags & LCD_FLAG_L) ? 1 : 0); |
7005b584 | 1059 | |
698b1515 | 1060 | long_sleep(10); |
7005b584 | 1061 | |
429ccf05 | 1062 | /* entry mode set : increment, cursor shifting */ |
2114924a | 1063 | lcd_write_cmd(LCD_CMD_ENTRY_MODE | LCD_CMD_CURSOR_INC); |
7005b584 | 1064 | |
698b1515 | 1065 | lcd_clear_display(); |
7005b584 WT |
1066 | } |
1067 | ||
1068 | /* | |
1069 | * These are the file operation function for user access to /dev/lcd | |
1070 | * This function can also be called from inside the kernel, by | |
1071 | * setting file and ppos to NULL. | |
1072 | * | |
1073 | */ | |
1074 | ||
429ccf05 HH |
1075 | static inline int handle_lcd_special_code(void) |
1076 | { | |
1077 | /* LCD special codes */ | |
1078 | ||
1079 | int processed = 0; | |
1080 | ||
6d8b588c MG |
1081 | char *esc = lcd.esc_seq.buf + 2; |
1082 | int oldflags = lcd.flags; | |
429ccf05 HH |
1083 | |
1084 | /* check for display mode flags */ | |
1085 | switch (*esc) { | |
1086 | case 'D': /* Display ON */ | |
6d8b588c | 1087 | lcd.flags |= LCD_FLAG_D; |
429ccf05 HH |
1088 | processed = 1; |
1089 | break; | |
1090 | case 'd': /* Display OFF */ | |
6d8b588c | 1091 | lcd.flags &= ~LCD_FLAG_D; |
429ccf05 HH |
1092 | processed = 1; |
1093 | break; | |
1094 | case 'C': /* Cursor ON */ | |
6d8b588c | 1095 | lcd.flags |= LCD_FLAG_C; |
429ccf05 HH |
1096 | processed = 1; |
1097 | break; | |
1098 | case 'c': /* Cursor OFF */ | |
6d8b588c | 1099 | lcd.flags &= ~LCD_FLAG_C; |
429ccf05 HH |
1100 | processed = 1; |
1101 | break; | |
1102 | case 'B': /* Blink ON */ | |
6d8b588c | 1103 | lcd.flags |= LCD_FLAG_B; |
429ccf05 HH |
1104 | processed = 1; |
1105 | break; | |
1106 | case 'b': /* Blink OFF */ | |
6d8b588c | 1107 | lcd.flags &= ~LCD_FLAG_B; |
429ccf05 HH |
1108 | processed = 1; |
1109 | break; | |
1110 | case '+': /* Back light ON */ | |
6d8b588c | 1111 | lcd.flags |= LCD_FLAG_L; |
429ccf05 HH |
1112 | processed = 1; |
1113 | break; | |
1114 | case '-': /* Back light OFF */ | |
6d8b588c | 1115 | lcd.flags &= ~LCD_FLAG_L; |
429ccf05 HH |
1116 | processed = 1; |
1117 | break; | |
1118 | case '*': | |
1119 | /* flash back light using the keypad timer */ | |
b565b3fb | 1120 | if (scan_timer.function) { |
832bf28c SS |
1121 | if (lcd.light_tempo == 0 && |
1122 | ((lcd.flags & LCD_FLAG_L) == 0)) | |
429ccf05 | 1123 | lcd_backlight(1); |
6d8b588c | 1124 | lcd.light_tempo = FLASH_LIGHT_TEMPO; |
429ccf05 HH |
1125 | } |
1126 | processed = 1; | |
1127 | break; | |
1128 | case 'f': /* Small Font */ | |
6d8b588c | 1129 | lcd.flags &= ~LCD_FLAG_F; |
429ccf05 HH |
1130 | processed = 1; |
1131 | break; | |
1132 | case 'F': /* Large Font */ | |
6d8b588c | 1133 | lcd.flags |= LCD_FLAG_F; |
429ccf05 HH |
1134 | processed = 1; |
1135 | break; | |
1136 | case 'n': /* One Line */ | |
6d8b588c | 1137 | lcd.flags &= ~LCD_FLAG_N; |
429ccf05 HH |
1138 | processed = 1; |
1139 | break; | |
1140 | case 'N': /* Two Lines */ | |
6d8b588c | 1141 | lcd.flags |= LCD_FLAG_N; |
429ccf05 HH |
1142 | break; |
1143 | case 'l': /* Shift Cursor Left */ | |
6d8b588c | 1144 | if (lcd.addr.x > 0) { |
429ccf05 | 1145 | /* back one char if not at end of line */ |
6d8b588c | 1146 | if (lcd.addr.x < lcd.bwidth) |
2114924a | 1147 | lcd_write_cmd(LCD_CMD_SHIFT); |
6d8b588c | 1148 | lcd.addr.x--; |
429ccf05 HH |
1149 | } |
1150 | processed = 1; | |
1151 | break; | |
1152 | case 'r': /* shift cursor right */ | |
6d8b588c | 1153 | if (lcd.addr.x < lcd.width) { |
429ccf05 | 1154 | /* allow the cursor to pass the end of the line */ |
2114924a MG |
1155 | if (lcd.addr.x < (lcd.bwidth - 1)) |
1156 | lcd_write_cmd(LCD_CMD_SHIFT | | |
1157 | LCD_CMD_SHIFT_RIGHT); | |
6d8b588c | 1158 | lcd.addr.x++; |
429ccf05 HH |
1159 | } |
1160 | processed = 1; | |
1161 | break; | |
1162 | case 'L': /* shift display left */ | |
2114924a | 1163 | lcd_write_cmd(LCD_CMD_SHIFT | LCD_CMD_DISPLAY_SHIFT); |
429ccf05 HH |
1164 | processed = 1; |
1165 | break; | |
1166 | case 'R': /* shift display right */ | |
2114924a MG |
1167 | lcd_write_cmd(LCD_CMD_SHIFT | LCD_CMD_DISPLAY_SHIFT | |
1168 | LCD_CMD_SHIFT_RIGHT); | |
429ccf05 HH |
1169 | processed = 1; |
1170 | break; | |
1171 | case 'k': { /* kill end of line */ | |
1172 | int x; | |
c3ed0afc | 1173 | |
6d8b588c | 1174 | for (x = lcd.addr.x; x < lcd.bwidth; x++) |
429ccf05 HH |
1175 | lcd_write_data(' '); |
1176 | ||
1177 | /* restore cursor position */ | |
1178 | lcd_gotoxy(); | |
1179 | processed = 1; | |
1180 | break; | |
1181 | } | |
1182 | case 'I': /* reinitialize display */ | |
1183 | lcd_init_display(); | |
429ccf05 HH |
1184 | processed = 1; |
1185 | break; | |
1186 | case 'G': { | |
1187 | /* Generator : LGcxxxxx...xx; must have <c> between '0' | |
1188 | * and '7', representing the numerical ASCII code of the | |
1189 | * redefined character, and <xx...xx> a sequence of 16 | |
1190 | * hex digits representing 8 bytes for each character. | |
1191 | * Most LCDs will only use 5 lower bits of the 7 first | |
1192 | * bytes. | |
1193 | */ | |
1194 | ||
1195 | unsigned char cgbytes[8]; | |
1196 | unsigned char cgaddr; | |
1197 | int cgoffset; | |
1198 | int shift; | |
1199 | char value; | |
1200 | int addr; | |
1201 | ||
b565b3fb | 1202 | if (!strchr(esc, ';')) |
429ccf05 HH |
1203 | break; |
1204 | ||
1205 | esc++; | |
1206 | ||
1207 | cgaddr = *(esc++) - '0'; | |
1208 | if (cgaddr > 7) { | |
1209 | processed = 1; | |
1210 | break; | |
1211 | } | |
1212 | ||
1213 | cgoffset = 0; | |
1214 | shift = 0; | |
1215 | value = 0; | |
1216 | while (*esc && cgoffset < 8) { | |
1217 | shift ^= 4; | |
3ac76904 | 1218 | if (*esc >= '0' && *esc <= '9') { |
429ccf05 | 1219 | value |= (*esc - '0') << shift; |
3ac76904 | 1220 | } else if (*esc >= 'A' && *esc <= 'Z') { |
429ccf05 | 1221 | value |= (*esc - 'A' + 10) << shift; |
3ac76904 | 1222 | } else if (*esc >= 'a' && *esc <= 'z') { |
429ccf05 | 1223 | value |= (*esc - 'a' + 10) << shift; |
3ac76904 | 1224 | } else { |
429ccf05 HH |
1225 | esc++; |
1226 | continue; | |
1227 | } | |
1228 | ||
1229 | if (shift == 0) { | |
1230 | cgbytes[cgoffset++] = value; | |
1231 | value = 0; | |
1232 | } | |
1233 | ||
1234 | esc++; | |
1235 | } | |
1236 | ||
2114924a | 1237 | lcd_write_cmd(LCD_CMD_SET_CGRAM_ADDR | (cgaddr * 8)); |
429ccf05 HH |
1238 | for (addr = 0; addr < cgoffset; addr++) |
1239 | lcd_write_data(cgbytes[addr]); | |
1240 | ||
1241 | /* ensures that we stop writing to CGRAM */ | |
1242 | lcd_gotoxy(); | |
1243 | processed = 1; | |
1244 | break; | |
1245 | } | |
1246 | case 'x': /* gotoxy : LxXXX[yYYY]; */ | |
1247 | case 'y': /* gotoxy : LyYYY[xXXX]; */ | |
b565b3fb | 1248 | if (!strchr(esc, ';')) |
429ccf05 HH |
1249 | break; |
1250 | ||
1251 | while (*esc) { | |
1252 | if (*esc == 'x') { | |
1253 | esc++; | |
6d8b588c | 1254 | if (kstrtoul(esc, 10, &lcd.addr.x) < 0) |
12995706 | 1255 | break; |
429ccf05 HH |
1256 | } else if (*esc == 'y') { |
1257 | esc++; | |
6d8b588c | 1258 | if (kstrtoul(esc, 10, &lcd.addr.y) < 0) |
12995706 | 1259 | break; |
3ac76904 | 1260 | } else { |
429ccf05 | 1261 | break; |
3ac76904 | 1262 | } |
429ccf05 HH |
1263 | } |
1264 | ||
1265 | lcd_gotoxy(); | |
1266 | processed = 1; | |
1267 | break; | |
1268 | } | |
1269 | ||
2114924a | 1270 | /* TODO: This indent party here got ugly, clean it! */ |
f2635894 | 1271 | /* Check whether one flag was changed */ |
6d8b588c | 1272 | if (oldflags != lcd.flags) { |
429ccf05 | 1273 | /* check whether one of B,C,D flags were changed */ |
6d8b588c | 1274 | if ((oldflags ^ lcd.flags) & |
429ccf05 HH |
1275 | (LCD_FLAG_B | LCD_FLAG_C | LCD_FLAG_D)) |
1276 | /* set display mode */ | |
2114924a MG |
1277 | lcd_write_cmd(LCD_CMD_DISPLAY_CTRL |
1278 | | ((lcd.flags & LCD_FLAG_D) | |
1279 | ? LCD_CMD_DISPLAY_ON : 0) | |
1280 | | ((lcd.flags & LCD_FLAG_C) | |
1281 | ? LCD_CMD_CURSOR_ON : 0) | |
1282 | | ((lcd.flags & LCD_FLAG_B) | |
1283 | ? LCD_CMD_BLINK_ON : 0)); | |
429ccf05 | 1284 | /* check whether one of F,N flags was changed */ |
6d8b588c | 1285 | else if ((oldflags ^ lcd.flags) & (LCD_FLAG_F | LCD_FLAG_N)) |
2114924a MG |
1286 | lcd_write_cmd(LCD_CMD_FUNCTION_SET |
1287 | | LCD_CMD_DATA_LEN_8BITS | |
1288 | | ((lcd.flags & LCD_FLAG_F) | |
1289 | ? LCD_CMD_TWO_LINES : 0) | |
1290 | | ((lcd.flags & LCD_FLAG_N) | |
1291 | ? LCD_CMD_FONT_5X10_DOTS | |
1292 | : 0)); | |
f2635894 | 1293 | /* check whether L flag was changed */ |
6d8b588c MG |
1294 | else if ((oldflags ^ lcd.flags) & (LCD_FLAG_L)) { |
1295 | if (lcd.flags & (LCD_FLAG_L)) | |
429ccf05 | 1296 | lcd_backlight(1); |
6d8b588c | 1297 | else if (lcd.light_tempo == 0) |
8c17893c NB |
1298 | /* |
1299 | * switch off the light only when the tempo | |
1300 | * lighting is gone | |
1301 | */ | |
429ccf05 HH |
1302 | lcd_backlight(0); |
1303 | } | |
1304 | } | |
1305 | ||
1306 | return processed; | |
1307 | } | |
1308 | ||
70a8c3eb BA |
1309 | static void lcd_write_char(char c) |
1310 | { | |
1311 | /* first, we'll test if we're in escape mode */ | |
6d8b588c | 1312 | if ((c != '\n') && lcd.esc_seq.len >= 0) { |
70a8c3eb | 1313 | /* yes, let's add this char to the buffer */ |
6d8b588c MG |
1314 | lcd.esc_seq.buf[lcd.esc_seq.len++] = c; |
1315 | lcd.esc_seq.buf[lcd.esc_seq.len] = 0; | |
70a8c3eb BA |
1316 | } else { |
1317 | /* aborts any previous escape sequence */ | |
6d8b588c | 1318 | lcd.esc_seq.len = -1; |
70a8c3eb BA |
1319 | |
1320 | switch (c) { | |
1321 | case LCD_ESCAPE_CHAR: | |
1322 | /* start of an escape sequence */ | |
6d8b588c MG |
1323 | lcd.esc_seq.len = 0; |
1324 | lcd.esc_seq.buf[lcd.esc_seq.len] = 0; | |
70a8c3eb BA |
1325 | break; |
1326 | case '\b': | |
1327 | /* go back one char and clear it */ | |
6d8b588c | 1328 | if (lcd.addr.x > 0) { |
8c17893c NB |
1329 | /* |
1330 | * check if we're not at the | |
1331 | * end of the line | |
1332 | */ | |
6d8b588c | 1333 | if (lcd.addr.x < lcd.bwidth) |
70a8c3eb | 1334 | /* back one char */ |
2114924a | 1335 | lcd_write_cmd(LCD_CMD_SHIFT); |
6d8b588c | 1336 | lcd.addr.x--; |
70a8c3eb BA |
1337 | } |
1338 | /* replace with a space */ | |
1339 | lcd_write_data(' '); | |
1340 | /* back one char again */ | |
2114924a | 1341 | lcd_write_cmd(LCD_CMD_SHIFT); |
70a8c3eb BA |
1342 | break; |
1343 | case '\014': | |
1344 | /* quickly clear the display */ | |
1345 | lcd_clear_fast(); | |
1346 | break; | |
1347 | case '\n': | |
8c17893c NB |
1348 | /* |
1349 | * flush the remainder of the current line and | |
1350 | * go to the beginning of the next line | |
1351 | */ | |
6d8b588c | 1352 | for (; lcd.addr.x < lcd.bwidth; lcd.addr.x++) |
70a8c3eb | 1353 | lcd_write_data(' '); |
6d8b588c MG |
1354 | lcd.addr.x = 0; |
1355 | lcd.addr.y = (lcd.addr.y + 1) % lcd.height; | |
70a8c3eb BA |
1356 | lcd_gotoxy(); |
1357 | break; | |
1358 | case '\r': | |
1359 | /* go to the beginning of the same line */ | |
6d8b588c | 1360 | lcd.addr.x = 0; |
70a8c3eb BA |
1361 | lcd_gotoxy(); |
1362 | break; | |
1363 | case '\t': | |
1364 | /* print a space instead of the tab */ | |
1365 | lcd_print(' '); | |
1366 | break; | |
1367 | default: | |
1368 | /* simply print this char */ | |
1369 | lcd_print(c); | |
1370 | break; | |
1371 | } | |
1372 | } | |
1373 | ||
8c17893c NB |
1374 | /* |
1375 | * now we'll see if we're in an escape mode and if the current | |
1376 | * escape sequence can be understood. | |
1377 | */ | |
6d8b588c | 1378 | if (lcd.esc_seq.len >= 2) { |
70a8c3eb BA |
1379 | int processed = 0; |
1380 | ||
6d8b588c | 1381 | if (!strcmp(lcd.esc_seq.buf, "[2J")) { |
70a8c3eb BA |
1382 | /* clear the display */ |
1383 | lcd_clear_fast(); | |
1384 | processed = 1; | |
6d8b588c | 1385 | } else if (!strcmp(lcd.esc_seq.buf, "[H")) { |
70a8c3eb | 1386 | /* cursor to home */ |
6d8b588c MG |
1387 | lcd.addr.x = 0; |
1388 | lcd.addr.y = 0; | |
70a8c3eb BA |
1389 | lcd_gotoxy(); |
1390 | processed = 1; | |
1391 | } | |
1392 | /* codes starting with ^[[L */ | |
6d8b588c MG |
1393 | else if ((lcd.esc_seq.len >= 3) && |
1394 | (lcd.esc_seq.buf[0] == '[') && | |
1395 | (lcd.esc_seq.buf[1] == 'L')) { | |
70a8c3eb BA |
1396 | processed = handle_lcd_special_code(); |
1397 | } | |
1398 | ||
1399 | /* LCD special escape codes */ | |
8c17893c NB |
1400 | /* |
1401 | * flush the escape sequence if it's been processed | |
1402 | * or if it is getting too long. | |
1403 | */ | |
6d8b588c MG |
1404 | if (processed || (lcd.esc_seq.len >= LCD_ESCAPE_LEN)) |
1405 | lcd.esc_seq.len = -1; | |
70a8c3eb BA |
1406 | } /* escape codes */ |
1407 | } | |
1408 | ||
698b1515 | 1409 | static ssize_t lcd_write(struct file *file, |
fdf4a494 | 1410 | const char __user *buf, size_t count, loff_t *ppos) |
698b1515 | 1411 | { |
70a8c3eb | 1412 | const char __user *tmp = buf; |
698b1515 WT |
1413 | char c; |
1414 | ||
70a8c3eb | 1415 | for (; count-- > 0; (*ppos)++, tmp++) { |
698b1515 | 1416 | if (!in_interrupt() && (((count + 1) & 0x1f) == 0)) |
8c17893c NB |
1417 | /* |
1418 | * let's be a little nice with other processes | |
1419 | * that need some CPU | |
1420 | */ | |
429ccf05 | 1421 | schedule(); |
698b1515 | 1422 | |
6a4193a2 | 1423 | if (get_user(c, tmp)) |
698b1515 WT |
1424 | return -EFAULT; |
1425 | ||
70a8c3eb | 1426 | lcd_write_char(c); |
698b1515 | 1427 | } |
7005b584 | 1428 | |
698b1515 | 1429 | return tmp - buf; |
7005b584 WT |
1430 | } |
1431 | ||
698b1515 WT |
1432 | static int lcd_open(struct inode *inode, struct file *file) |
1433 | { | |
f4757af8 | 1434 | if (!atomic_dec_and_test(&lcd_available)) |
698b1515 | 1435 | return -EBUSY; /* open only once at a time */ |
7005b584 | 1436 | |
698b1515 WT |
1437 | if (file->f_mode & FMODE_READ) /* device is write-only */ |
1438 | return -EPERM; | |
7005b584 | 1439 | |
6d8b588c | 1440 | if (lcd.must_clear) { |
698b1515 | 1441 | lcd_clear_display(); |
6d8b588c | 1442 | lcd.must_clear = false; |
698b1515 | 1443 | } |
3ff81013 | 1444 | return nonseekable_open(inode, file); |
7005b584 WT |
1445 | } |
1446 | ||
698b1515 WT |
1447 | static int lcd_release(struct inode *inode, struct file *file) |
1448 | { | |
f4757af8 | 1449 | atomic_inc(&lcd_available); |
698b1515 | 1450 | return 0; |
7005b584 WT |
1451 | } |
1452 | ||
429ccf05 | 1453 | static const struct file_operations lcd_fops = { |
698b1515 WT |
1454 | .write = lcd_write, |
1455 | .open = lcd_open, | |
1456 | .release = lcd_release, | |
3ff81013 | 1457 | .llseek = no_llseek, |
7005b584 WT |
1458 | }; |
1459 | ||
1460 | static struct miscdevice lcd_dev = { | |
6c3773de MG |
1461 | .minor = LCD_MINOR, |
1462 | .name = "lcd", | |
1463 | .fops = &lcd_fops, | |
7005b584 WT |
1464 | }; |
1465 | ||
7005b584 | 1466 | /* public function usable from the kernel for any purpose */ |
36d2041a | 1467 | static void panel_lcd_print(const char *s) |
698b1515 | 1468 | { |
70a8c3eb BA |
1469 | const char *tmp = s; |
1470 | int count = strlen(s); | |
1471 | ||
6d8b588c | 1472 | if (lcd.enabled && lcd.initialized) { |
70a8c3eb BA |
1473 | for (; count-- > 0; tmp++) { |
1474 | if (!in_interrupt() && (((count + 1) & 0x1f) == 0)) | |
8c17893c NB |
1475 | /* |
1476 | * let's be a little nice with other processes | |
1477 | * that need some CPU | |
1478 | */ | |
70a8c3eb BA |
1479 | schedule(); |
1480 | ||
1481 | lcd_write_char(*tmp); | |
1482 | } | |
1483 | } | |
7005b584 WT |
1484 | } |
1485 | ||
7005b584 | 1486 | /* initialize the LCD driver */ |
36d2041a | 1487 | static void lcd_init(void) |
698b1515 | 1488 | { |
87b8e0c8 | 1489 | switch (selected_lcd_type) { |
429ccf05 HH |
1490 | case LCD_TYPE_OLD: |
1491 | /* parallel mode, 8 bits */ | |
8037e2a3 MG |
1492 | lcd.proto = LCD_PROTO_PARALLEL; |
1493 | lcd.charset = LCD_CHARSET_NORMAL; | |
1494 | lcd.pins.e = PIN_STROBE; | |
1495 | lcd.pins.rs = PIN_AUTOLF; | |
1496 | ||
1497 | lcd.width = 40; | |
1498 | lcd.bwidth = 40; | |
1499 | lcd.hwidth = 64; | |
1500 | lcd.height = 2; | |
7005b584 | 1501 | break; |
429ccf05 HH |
1502 | case LCD_TYPE_KS0074: |
1503 | /* serial mode, ks0074 */ | |
8037e2a3 MG |
1504 | lcd.proto = LCD_PROTO_SERIAL; |
1505 | lcd.charset = LCD_CHARSET_KS0074; | |
1506 | lcd.pins.bl = PIN_AUTOLF; | |
1507 | lcd.pins.cl = PIN_STROBE; | |
1508 | lcd.pins.da = PIN_D0; | |
1509 | ||
1510 | lcd.width = 16; | |
1511 | lcd.bwidth = 40; | |
1512 | lcd.hwidth = 16; | |
1513 | lcd.height = 2; | |
7005b584 | 1514 | break; |
429ccf05 HH |
1515 | case LCD_TYPE_NEXCOM: |
1516 | /* parallel mode, 8 bits, generic */ | |
8037e2a3 MG |
1517 | lcd.proto = LCD_PROTO_PARALLEL; |
1518 | lcd.charset = LCD_CHARSET_NORMAL; | |
1519 | lcd.pins.e = PIN_AUTOLF; | |
1520 | lcd.pins.rs = PIN_SELECP; | |
1521 | lcd.pins.rw = PIN_INITP; | |
1522 | ||
1523 | lcd.width = 16; | |
1524 | lcd.bwidth = 40; | |
1525 | lcd.hwidth = 64; | |
1526 | lcd.height = 2; | |
7005b584 | 1527 | break; |
429ccf05 HH |
1528 | case LCD_TYPE_CUSTOM: |
1529 | /* customer-defined */ | |
8037e2a3 MG |
1530 | lcd.proto = DEFAULT_LCD_PROTO; |
1531 | lcd.charset = DEFAULT_LCD_CHARSET; | |
7005b584 WT |
1532 | /* default geometry will be set later */ |
1533 | break; | |
429ccf05 HH |
1534 | case LCD_TYPE_HANTRONIX: |
1535 | /* parallel mode, 8 bits, hantronix-like */ | |
698b1515 | 1536 | default: |
8037e2a3 MG |
1537 | lcd.proto = LCD_PROTO_PARALLEL; |
1538 | lcd.charset = LCD_CHARSET_NORMAL; | |
1539 | lcd.pins.e = PIN_STROBE; | |
1540 | lcd.pins.rs = PIN_SELECP; | |
1541 | ||
1542 | lcd.width = 16; | |
1543 | lcd.bwidth = 40; | |
1544 | lcd.hwidth = 64; | |
1545 | lcd.height = 2; | |
7005b584 | 1546 | break; |
698b1515 | 1547 | } |
7005b584 | 1548 | |
8037e2a3 | 1549 | /* Overwrite with module params set on loading */ |
1a4b2e3e | 1550 | if (lcd_height != NOT_SET) |
8037e2a3 | 1551 | lcd.height = lcd_height; |
1a4b2e3e | 1552 | if (lcd_width != NOT_SET) |
8037e2a3 | 1553 | lcd.width = lcd_width; |
1a4b2e3e | 1554 | if (lcd_bwidth != NOT_SET) |
8037e2a3 | 1555 | lcd.bwidth = lcd_bwidth; |
1a4b2e3e | 1556 | if (lcd_hwidth != NOT_SET) |
8037e2a3 | 1557 | lcd.hwidth = lcd_hwidth; |
1a4b2e3e | 1558 | if (lcd_charset != NOT_SET) |
8037e2a3 | 1559 | lcd.charset = lcd_charset; |
1a4b2e3e | 1560 | if (lcd_proto != NOT_SET) |
8037e2a3 MG |
1561 | lcd.proto = lcd_proto; |
1562 | if (lcd_e_pin != PIN_NOT_SET) | |
1563 | lcd.pins.e = lcd_e_pin; | |
1564 | if (lcd_rs_pin != PIN_NOT_SET) | |
1565 | lcd.pins.rs = lcd_rs_pin; | |
1566 | if (lcd_rw_pin != PIN_NOT_SET) | |
1567 | lcd.pins.rw = lcd_rw_pin; | |
1568 | if (lcd_cl_pin != PIN_NOT_SET) | |
1569 | lcd.pins.cl = lcd_cl_pin; | |
1570 | if (lcd_da_pin != PIN_NOT_SET) | |
1571 | lcd.pins.da = lcd_da_pin; | |
1572 | if (lcd_bl_pin != PIN_NOT_SET) | |
1573 | lcd.pins.bl = lcd_bl_pin; | |
1574 | ||
698b1515 | 1575 | /* this is used to catch wrong and default values */ |
8037e2a3 MG |
1576 | if (lcd.width <= 0) |
1577 | lcd.width = DEFAULT_LCD_WIDTH; | |
1578 | if (lcd.bwidth <= 0) | |
1579 | lcd.bwidth = DEFAULT_LCD_BWIDTH; | |
1580 | if (lcd.hwidth <= 0) | |
1581 | lcd.hwidth = DEFAULT_LCD_HWIDTH; | |
1582 | if (lcd.height <= 0) | |
1583 | lcd.height = DEFAULT_LCD_HEIGHT; | |
1584 | ||
1585 | if (lcd.proto == LCD_PROTO_SERIAL) { /* SERIAL */ | |
698b1515 WT |
1586 | lcd_write_cmd = lcd_write_cmd_s; |
1587 | lcd_write_data = lcd_write_data_s; | |
1588 | lcd_clear_fast = lcd_clear_fast_s; | |
1589 | ||
8037e2a3 MG |
1590 | if (lcd.pins.cl == PIN_NOT_SET) |
1591 | lcd.pins.cl = DEFAULT_LCD_PIN_SCL; | |
1592 | if (lcd.pins.da == PIN_NOT_SET) | |
1593 | lcd.pins.da = DEFAULT_LCD_PIN_SDA; | |
698b1515 | 1594 | |
8037e2a3 | 1595 | } else if (lcd.proto == LCD_PROTO_PARALLEL) { /* PARALLEL */ |
698b1515 WT |
1596 | lcd_write_cmd = lcd_write_cmd_p8; |
1597 | lcd_write_data = lcd_write_data_p8; | |
1598 | lcd_clear_fast = lcd_clear_fast_p8; | |
1599 | ||
8037e2a3 MG |
1600 | if (lcd.pins.e == PIN_NOT_SET) |
1601 | lcd.pins.e = DEFAULT_LCD_PIN_E; | |
1602 | if (lcd.pins.rs == PIN_NOT_SET) | |
1603 | lcd.pins.rs = DEFAULT_LCD_PIN_RS; | |
1604 | if (lcd.pins.rw == PIN_NOT_SET) | |
1605 | lcd.pins.rw = DEFAULT_LCD_PIN_RW; | |
77943d31 SR |
1606 | } else { |
1607 | lcd_write_cmd = lcd_write_cmd_tilcd; | |
1608 | lcd_write_data = lcd_write_data_tilcd; | |
1609 | lcd_clear_fast = lcd_clear_fast_tilcd; | |
698b1515 | 1610 | } |
7005b584 | 1611 | |
8037e2a3 MG |
1612 | if (lcd.pins.bl == PIN_NOT_SET) |
1613 | lcd.pins.bl = DEFAULT_LCD_PIN_BL; | |
1614 | ||
1615 | if (lcd.pins.e == PIN_NOT_SET) | |
1616 | lcd.pins.e = PIN_NONE; | |
1617 | if (lcd.pins.rs == PIN_NOT_SET) | |
1618 | lcd.pins.rs = PIN_NONE; | |
1619 | if (lcd.pins.rw == PIN_NOT_SET) | |
1620 | lcd.pins.rw = PIN_NONE; | |
1621 | if (lcd.pins.bl == PIN_NOT_SET) | |
1622 | lcd.pins.bl = PIN_NONE; | |
1623 | if (lcd.pins.cl == PIN_NOT_SET) | |
1624 | lcd.pins.cl = PIN_NONE; | |
1625 | if (lcd.pins.da == PIN_NOT_SET) | |
1626 | lcd.pins.da = PIN_NONE; | |
1627 | ||
1628 | if (lcd.charset == NOT_SET) | |
1629 | lcd.charset = DEFAULT_LCD_CHARSET; | |
1630 | ||
1631 | if (lcd.charset == LCD_CHARSET_KS0074) | |
698b1515 WT |
1632 | lcd_char_conv = lcd_char_conv_ks0074; |
1633 | else | |
1634 | lcd_char_conv = NULL; | |
1635 | ||
8037e2a3 | 1636 | if (lcd.pins.bl != PIN_NONE) |
698b1515 WT |
1637 | init_scan_timer(); |
1638 | ||
8037e2a3 | 1639 | pin_to_bits(lcd.pins.e, lcd_bits[LCD_PORT_D][LCD_BIT_E], |
698b1515 | 1640 | lcd_bits[LCD_PORT_C][LCD_BIT_E]); |
8037e2a3 | 1641 | pin_to_bits(lcd.pins.rs, lcd_bits[LCD_PORT_D][LCD_BIT_RS], |
698b1515 | 1642 | lcd_bits[LCD_PORT_C][LCD_BIT_RS]); |
8037e2a3 | 1643 | pin_to_bits(lcd.pins.rw, lcd_bits[LCD_PORT_D][LCD_BIT_RW], |
698b1515 | 1644 | lcd_bits[LCD_PORT_C][LCD_BIT_RW]); |
8037e2a3 | 1645 | pin_to_bits(lcd.pins.bl, lcd_bits[LCD_PORT_D][LCD_BIT_BL], |
698b1515 | 1646 | lcd_bits[LCD_PORT_C][LCD_BIT_BL]); |
8037e2a3 | 1647 | pin_to_bits(lcd.pins.cl, lcd_bits[LCD_PORT_D][LCD_BIT_CL], |
698b1515 | 1648 | lcd_bits[LCD_PORT_C][LCD_BIT_CL]); |
8037e2a3 | 1649 | pin_to_bits(lcd.pins.da, lcd_bits[LCD_PORT_D][LCD_BIT_DA], |
698b1515 WT |
1650 | lcd_bits[LCD_PORT_C][LCD_BIT_DA]); |
1651 | ||
8c17893c NB |
1652 | /* |
1653 | * before this line, we must NOT send anything to the display. | |
698b1515 | 1654 | * Since lcd_init_display() needs to write data, we have to |
8c17893c NB |
1655 | * enable mark the LCD initialized just before. |
1656 | */ | |
6d8b588c | 1657 | lcd.initialized = true; |
698b1515 | 1658 | lcd_init_display(); |
7005b584 | 1659 | |
698b1515 | 1660 | /* display a short message */ |
7005b584 WT |
1661 | #ifdef CONFIG_PANEL_CHANGE_MESSAGE |
1662 | #ifdef CONFIG_PANEL_BOOT_MESSAGE | |
698b1515 | 1663 | panel_lcd_print("\x1b[Lc\x1b[Lb\x1b[L*" CONFIG_PANEL_BOOT_MESSAGE); |
7005b584 WT |
1664 | #endif |
1665 | #else | |
698b1515 WT |
1666 | panel_lcd_print("\x1b[Lc\x1b[Lb\x1b[L*Linux-" UTS_RELEASE "\nPanel-" |
1667 | PANEL_VERSION); | |
7005b584 | 1668 | #endif |
6d8b588c MG |
1669 | lcd.addr.x = 0; |
1670 | lcd.addr.y = 0; | |
429ccf05 | 1671 | /* clear the display on the next device opening */ |
6d8b588c | 1672 | lcd.must_clear = true; |
698b1515 | 1673 | lcd_gotoxy(); |
7005b584 WT |
1674 | } |
1675 | ||
7005b584 WT |
1676 | /* |
1677 | * These are the file operation function for user access to /dev/keypad | |
1678 | */ | |
1679 | ||
698b1515 | 1680 | static ssize_t keypad_read(struct file *file, |
cce75f41 | 1681 | char __user *buf, size_t count, loff_t *ppos) |
698b1515 | 1682 | { |
698b1515 | 1683 | unsigned i = *ppos; |
cce75f41 | 1684 | char __user *tmp = buf; |
7005b584 | 1685 | |
698b1515 WT |
1686 | if (keypad_buflen == 0) { |
1687 | if (file->f_flags & O_NONBLOCK) | |
1688 | return -EAGAIN; | |
7005b584 | 1689 | |
310df69c AB |
1690 | if (wait_event_interruptible(keypad_read_wait, |
1691 | keypad_buflen != 0)) | |
698b1515 WT |
1692 | return -EINTR; |
1693 | } | |
7005b584 | 1694 | |
429ccf05 HH |
1695 | for (; count-- > 0 && (keypad_buflen > 0); |
1696 | ++i, ++tmp, --keypad_buflen) { | |
698b1515 WT |
1697 | put_user(keypad_buffer[keypad_start], tmp); |
1698 | keypad_start = (keypad_start + 1) % KEYPAD_BUFFER; | |
1699 | } | |
1700 | *ppos = i; | |
7005b584 | 1701 | |
698b1515 | 1702 | return tmp - buf; |
7005b584 WT |
1703 | } |
1704 | ||
698b1515 WT |
1705 | static int keypad_open(struct inode *inode, struct file *file) |
1706 | { | |
f4757af8 | 1707 | if (!atomic_dec_and_test(&keypad_available)) |
698b1515 | 1708 | return -EBUSY; /* open only once at a time */ |
7005b584 | 1709 | |
698b1515 WT |
1710 | if (file->f_mode & FMODE_WRITE) /* device is read-only */ |
1711 | return -EPERM; | |
7005b584 | 1712 | |
698b1515 | 1713 | keypad_buflen = 0; /* flush the buffer on opening */ |
698b1515 | 1714 | return 0; |
7005b584 WT |
1715 | } |
1716 | ||
698b1515 WT |
1717 | static int keypad_release(struct inode *inode, struct file *file) |
1718 | { | |
f4757af8 | 1719 | atomic_inc(&keypad_available); |
698b1515 | 1720 | return 0; |
7005b584 WT |
1721 | } |
1722 | ||
429ccf05 | 1723 | static const struct file_operations keypad_fops = { |
698b1515 WT |
1724 | .read = keypad_read, /* read */ |
1725 | .open = keypad_open, /* open */ | |
1726 | .release = keypad_release, /* close */ | |
6038f373 | 1727 | .llseek = default_llseek, |
7005b584 WT |
1728 | }; |
1729 | ||
1730 | static struct miscdevice keypad_dev = { | |
6c3773de MG |
1731 | .minor = KEYPAD_MINOR, |
1732 | .name = "keypad", | |
1733 | .fops = &keypad_fops, | |
7005b584 WT |
1734 | }; |
1735 | ||
36d2041a | 1736 | static void keypad_send_key(const char *string, int max_len) |
698b1515 | 1737 | { |
698b1515 | 1738 | /* send the key to the device only if a process is attached to it. */ |
f4757af8 | 1739 | if (!atomic_read(&keypad_available)) { |
698b1515 WT |
1740 | while (max_len-- && keypad_buflen < KEYPAD_BUFFER && *string) { |
1741 | keypad_buffer[(keypad_start + keypad_buflen++) % | |
1742 | KEYPAD_BUFFER] = *string++; | |
1743 | } | |
1744 | wake_up_interruptible(&keypad_read_wait); | |
7005b584 | 1745 | } |
7005b584 WT |
1746 | } |
1747 | ||
429ccf05 HH |
1748 | /* this function scans all the bits involving at least one logical signal, |
1749 | * and puts the results in the bitfield "phys_read" (one bit per established | |
1750 | * contact), and sets "phys_read_prev" to "phys_read". | |
7005b584 | 1751 | * |
429ccf05 HH |
1752 | * Note: to debounce input signals, we will only consider as switched a signal |
1753 | * which is stable across 2 measures. Signals which are different between two | |
1754 | * reads will be kept as they previously were in their logical form (phys_prev). | |
1755 | * A signal which has just switched will have a 1 in | |
1756 | * (phys_read ^ phys_read_prev). | |
7005b584 | 1757 | */ |
698b1515 WT |
1758 | static void phys_scan_contacts(void) |
1759 | { | |
1760 | int bit, bitval; | |
1761 | char oldval; | |
1762 | char bitmask; | |
1763 | char gndmask; | |
1764 | ||
1765 | phys_prev = phys_curr; | |
1766 | phys_read_prev = phys_read; | |
1767 | phys_read = 0; /* flush all signals */ | |
1768 | ||
429ccf05 HH |
1769 | /* keep track of old value, with all outputs disabled */ |
1770 | oldval = r_dtr(pprt) | scan_mask_o; | |
1771 | /* activate all keyboard outputs (active low) */ | |
1772 | w_dtr(pprt, oldval & ~scan_mask_o); | |
1773 | ||
1774 | /* will have a 1 for each bit set to gnd */ | |
1775 | bitmask = PNL_PINPUT(r_str(pprt)) & scan_mask_i; | |
1776 | /* disable all matrix signals */ | |
1777 | w_dtr(pprt, oldval); | |
698b1515 WT |
1778 | |
1779 | /* now that all outputs are cleared, the only active input bits are | |
1780 | * directly connected to the ground | |
7005b584 | 1781 | */ |
698b1515 | 1782 | |
429ccf05 HH |
1783 | /* 1 for each grounded input */ |
1784 | gndmask = PNL_PINPUT(r_str(pprt)) & scan_mask_i; | |
1785 | ||
1786 | /* grounded inputs are signals 40-44 */ | |
1787 | phys_read |= (pmask_t) gndmask << 40; | |
7005b584 | 1788 | |
698b1515 | 1789 | if (bitmask != gndmask) { |
8c17893c NB |
1790 | /* |
1791 | * since clearing the outputs changed some inputs, we know | |
429ccf05 HH |
1792 | * that some input signals are currently tied to some outputs. |
1793 | * So we'll scan them. | |
698b1515 WT |
1794 | */ |
1795 | for (bit = 0; bit < 8; bit++) { | |
79f2af62 | 1796 | bitval = BIT(bit); |
7005b584 | 1797 | |
698b1515 WT |
1798 | if (!(scan_mask_o & bitval)) /* skip unused bits */ |
1799 | continue; | |
1800 | ||
1801 | w_dtr(pprt, oldval & ~bitval); /* enable this output */ | |
1802 | bitmask = PNL_PINPUT(r_str(pprt)) & ~gndmask; | |
1803 | phys_read |= (pmask_t) bitmask << (5 * bit); | |
1804 | } | |
1805 | w_dtr(pprt, oldval); /* disable all outputs */ | |
7005b584 | 1806 | } |
8c17893c NB |
1807 | /* |
1808 | * this is easy: use old bits when they are flapping, | |
1809 | * use new ones when stable | |
1810 | */ | |
429ccf05 HH |
1811 | phys_curr = (phys_prev & (phys_read ^ phys_read_prev)) | |
1812 | (phys_read & ~(phys_read ^ phys_read_prev)); | |
1813 | } | |
1814 | ||
1815 | static inline int input_state_high(struct logical_input *input) | |
1816 | { | |
1817 | #if 0 | |
1818 | /* FIXME: | |
1819 | * this is an invalid test. It tries to catch | |
1820 | * transitions from single-key to multiple-key, but | |
1821 | * doesn't take into account the contacts polarity. | |
1822 | * The only solution to the problem is to parse keys | |
1823 | * from the most complex to the simplest combinations, | |
1824 | * and mark them as 'caught' once a combination | |
1825 | * matches, then unmatch it for all other ones. | |
1826 | */ | |
1827 | ||
1828 | /* try to catch dangerous transitions cases : | |
1829 | * someone adds a bit, so this signal was a false | |
1830 | * positive resulting from a transition. We should | |
1831 | * invalidate the signal immediately and not call the | |
1832 | * release function. | |
1833 | * eg: 0 -(press A)-> A -(press B)-> AB : don't match A's release. | |
1834 | */ | |
fdf4a494 DB |
1835 | if (((phys_prev & input->mask) == input->value) && |
1836 | ((phys_curr & input->mask) > input->value)) { | |
429ccf05 HH |
1837 | input->state = INPUT_ST_LOW; /* invalidate */ |
1838 | return 1; | |
1839 | } | |
1840 | #endif | |
1841 | ||
1842 | if ((phys_curr & input->mask) == input->value) { | |
1843 | if ((input->type == INPUT_TYPE_STD) && | |
1844 | (input->high_timer == 0)) { | |
1845 | input->high_timer++; | |
b565b3fb | 1846 | if (input->u.std.press_fct) |
429ccf05 HH |
1847 | input->u.std.press_fct(input->u.std.press_data); |
1848 | } else if (input->type == INPUT_TYPE_KBD) { | |
1849 | /* will turn on the light */ | |
1850 | keypressed = 1; | |
1851 | ||
1852 | if (input->high_timer == 0) { | |
1853 | char *press_str = input->u.kbd.press_str; | |
c3ed0afc | 1854 | |
e6626de5 JC |
1855 | if (press_str[0]) { |
1856 | int s = sizeof(input->u.kbd.press_str); | |
c3ed0afc | 1857 | |
e6626de5 JC |
1858 | keypad_send_key(press_str, s); |
1859 | } | |
429ccf05 HH |
1860 | } |
1861 | ||
1862 | if (input->u.kbd.repeat_str[0]) { | |
1863 | char *repeat_str = input->u.kbd.repeat_str; | |
c3ed0afc | 1864 | |
429ccf05 | 1865 | if (input->high_timer >= KEYPAD_REP_START) { |
e6626de5 | 1866 | int s = sizeof(input->u.kbd.repeat_str); |
c3ed0afc | 1867 | |
429ccf05 | 1868 | input->high_timer -= KEYPAD_REP_DELAY; |
e6626de5 | 1869 | keypad_send_key(repeat_str, s); |
429ccf05 HH |
1870 | } |
1871 | /* we will need to come back here soon */ | |
1872 | inputs_stable = 0; | |
1873 | } | |
1874 | ||
1875 | if (input->high_timer < 255) | |
1876 | input->high_timer++; | |
1877 | } | |
1878 | return 1; | |
429ccf05 | 1879 | } |
083b3638 VH |
1880 | |
1881 | /* else signal falling down. Let's fall through. */ | |
1882 | input->state = INPUT_ST_FALLING; | |
1883 | input->fall_timer = 0; | |
1884 | ||
429ccf05 HH |
1885 | return 0; |
1886 | } | |
1887 | ||
1888 | static inline void input_state_falling(struct logical_input *input) | |
1889 | { | |
1890 | #if 0 | |
1891 | /* FIXME !!! same comment as in input_state_high */ | |
fdf4a494 DB |
1892 | if (((phys_prev & input->mask) == input->value) && |
1893 | ((phys_curr & input->mask) > input->value)) { | |
429ccf05 HH |
1894 | input->state = INPUT_ST_LOW; /* invalidate */ |
1895 | return; | |
1896 | } | |
1897 | #endif | |
1898 | ||
1899 | if ((phys_curr & input->mask) == input->value) { | |
1900 | if (input->type == INPUT_TYPE_KBD) { | |
1901 | /* will turn on the light */ | |
1902 | keypressed = 1; | |
1903 | ||
1904 | if (input->u.kbd.repeat_str[0]) { | |
1905 | char *repeat_str = input->u.kbd.repeat_str; | |
c3ed0afc | 1906 | |
e6626de5 JC |
1907 | if (input->high_timer >= KEYPAD_REP_START) { |
1908 | int s = sizeof(input->u.kbd.repeat_str); | |
c3ed0afc | 1909 | |
429ccf05 | 1910 | input->high_timer -= KEYPAD_REP_DELAY; |
e6626de5 JC |
1911 | keypad_send_key(repeat_str, s); |
1912 | } | |
429ccf05 HH |
1913 | /* we will need to come back here soon */ |
1914 | inputs_stable = 0; | |
1915 | } | |
1916 | ||
1917 | if (input->high_timer < 255) | |
1918 | input->high_timer++; | |
1919 | } | |
1920 | input->state = INPUT_ST_HIGH; | |
1921 | } else if (input->fall_timer >= input->fall_time) { | |
1922 | /* call release event */ | |
1923 | if (input->type == INPUT_TYPE_STD) { | |
1924 | void (*release_fct)(int) = input->u.std.release_fct; | |
c3ed0afc | 1925 | |
b565b3fb | 1926 | if (release_fct) |
429ccf05 HH |
1927 | release_fct(input->u.std.release_data); |
1928 | } else if (input->type == INPUT_TYPE_KBD) { | |
1929 | char *release_str = input->u.kbd.release_str; | |
c3ed0afc | 1930 | |
e6626de5 JC |
1931 | if (release_str[0]) { |
1932 | int s = sizeof(input->u.kbd.release_str); | |
c3ed0afc | 1933 | |
e6626de5 JC |
1934 | keypad_send_key(release_str, s); |
1935 | } | |
429ccf05 HH |
1936 | } |
1937 | ||
1938 | input->state = INPUT_ST_LOW; | |
1939 | } else { | |
1940 | input->fall_timer++; | |
1941 | inputs_stable = 0; | |
1942 | } | |
7005b584 WT |
1943 | } |
1944 | ||
698b1515 WT |
1945 | static void panel_process_inputs(void) |
1946 | { | |
1947 | struct list_head *item; | |
1948 | struct logical_input *input; | |
7005b584 | 1949 | |
698b1515 WT |
1950 | keypressed = 0; |
1951 | inputs_stable = 1; | |
1952 | list_for_each(item, &logical_inputs) { | |
1953 | input = list_entry(item, struct logical_input, list); | |
1954 | ||
1955 | switch (input->state) { | |
1956 | case INPUT_ST_LOW: | |
1957 | if ((phys_curr & input->mask) != input->value) | |
1958 | break; | |
429ccf05 HH |
1959 | /* if all needed ones were already set previously, |
1960 | * this means that this logical signal has been | |
1961 | * activated by the releasing of another combined | |
1962 | * signal, so we don't want to match. | |
1963 | * eg: AB -(release B)-> A -(release A)-> 0 : | |
1964 | * don't match A. | |
698b1515 WT |
1965 | */ |
1966 | if ((phys_prev & input->mask) == input->value) | |
1967 | break; | |
1968 | input->rise_timer = 0; | |
1969 | input->state = INPUT_ST_RISING; | |
1970 | /* no break here, fall through */ | |
1971 | case INPUT_ST_RISING: | |
1972 | if ((phys_curr & input->mask) != input->value) { | |
1973 | input->state = INPUT_ST_LOW; | |
1974 | break; | |
1975 | } | |
1976 | if (input->rise_timer < input->rise_time) { | |
1977 | inputs_stable = 0; | |
1978 | input->rise_timer++; | |
1979 | break; | |
1980 | } | |
1981 | input->high_timer = 0; | |
1982 | input->state = INPUT_ST_HIGH; | |
1983 | /* no break here, fall through */ | |
1984 | case INPUT_ST_HIGH: | |
429ccf05 | 1985 | if (input_state_high(input)) |
698b1515 | 1986 | break; |
698b1515 WT |
1987 | /* no break here, fall through */ |
1988 | case INPUT_ST_FALLING: | |
429ccf05 | 1989 | input_state_falling(input); |
698b1515 WT |
1990 | } |
1991 | } | |
1992 | } | |
7005b584 | 1993 | |
698b1515 WT |
1994 | static void panel_scan_timer(void) |
1995 | { | |
a8b2580b | 1996 | if (keypad.enabled && keypad_initialized) { |
d4d2dbca | 1997 | if (spin_trylock_irq(&pprt_lock)) { |
698b1515 | 1998 | phys_scan_contacts(); |
429ccf05 HH |
1999 | |
2000 | /* no need for the parport anymore */ | |
d4d2dbca | 2001 | spin_unlock_irq(&pprt_lock); |
7005b584 WT |
2002 | } |
2003 | ||
698b1515 WT |
2004 | if (!inputs_stable || phys_curr != phys_prev) |
2005 | panel_process_inputs(); | |
7005b584 | 2006 | } |
7005b584 | 2007 | |
6d8b588c | 2008 | if (lcd.enabled && lcd.initialized) { |
698b1515 | 2009 | if (keypressed) { |
832bf28c SS |
2010 | if (lcd.light_tempo == 0 && |
2011 | ((lcd.flags & LCD_FLAG_L) == 0)) | |
698b1515 | 2012 | lcd_backlight(1); |
6d8b588c MG |
2013 | lcd.light_tempo = FLASH_LIGHT_TEMPO; |
2014 | } else if (lcd.light_tempo > 0) { | |
2015 | lcd.light_tempo--; | |
832bf28c SS |
2016 | if (lcd.light_tempo == 0 && |
2017 | ((lcd.flags & LCD_FLAG_L) == 0)) | |
698b1515 WT |
2018 | lcd_backlight(0); |
2019 | } | |
2020 | } | |
2021 | ||
2022 | mod_timer(&scan_timer, jiffies + INPUT_POLL_TIME); | |
7005b584 WT |
2023 | } |
2024 | ||
698b1515 WT |
2025 | static void init_scan_timer(void) |
2026 | { | |
b565b3fb | 2027 | if (scan_timer.function) |
698b1515 WT |
2028 | return; /* already started */ |
2029 | ||
8f6e36c5 | 2030 | setup_timer(&scan_timer, (void *)&panel_scan_timer, 0); |
698b1515 | 2031 | scan_timer.expires = jiffies + INPUT_POLL_TIME; |
698b1515 | 2032 | add_timer(&scan_timer); |
7005b584 WT |
2033 | } |
2034 | ||
2035 | /* converts a name of the form "({BbAaPpSsEe}{01234567-})*" to a series of bits. | |
429ccf05 HH |
2036 | * if <omask> or <imask> are non-null, they will be or'ed with the bits |
2037 | * corresponding to out and in bits respectively. | |
7005b584 WT |
2038 | * returns 1 if ok, 0 if error (in which case, nothing is written). |
2039 | */ | |
36d2041a | 2040 | static int input_name2mask(const char *name, pmask_t *mask, pmask_t *value, |
698b1515 WT |
2041 | char *imask, char *omask) |
2042 | { | |
2043 | static char sigtab[10] = "EeSsPpAaBb"; | |
2044 | char im, om; | |
2045 | pmask_t m, v; | |
2046 | ||
2d53426b DB |
2047 | om = 0ULL; |
2048 | im = 0ULL; | |
2049 | m = 0ULL; | |
2050 | v = 0ULL; | |
698b1515 WT |
2051 | while (*name) { |
2052 | int in, out, bit, neg; | |
c3ed0afc | 2053 | |
fdf4a494 DB |
2054 | for (in = 0; (in < sizeof(sigtab)) && (sigtab[in] != *name); |
2055 | in++) | |
698b1515 | 2056 | ; |
fdf4a494 | 2057 | |
698b1515 WT |
2058 | if (in >= sizeof(sigtab)) |
2059 | return 0; /* input name not found */ | |
2060 | neg = (in & 1); /* odd (lower) names are negated */ | |
2061 | in >>= 1; | |
79f2af62 | 2062 | im |= BIT(in); |
698b1515 WT |
2063 | |
2064 | name++; | |
2065 | if (isdigit(*name)) { | |
2066 | out = *name - '0'; | |
79f2af62 | 2067 | om |= BIT(out); |
3ac76904 | 2068 | } else if (*name == '-') { |
698b1515 | 2069 | out = 8; |
3ac76904 | 2070 | } else { |
698b1515 | 2071 | return 0; /* unknown bit name */ |
3ac76904 | 2072 | } |
698b1515 WT |
2073 | |
2074 | bit = (out * 5) + in; | |
2075 | ||
2076 | m |= 1ULL << bit; | |
2077 | if (!neg) | |
2078 | v |= 1ULL << bit; | |
2079 | name++; | |
7005b584 | 2080 | } |
698b1515 WT |
2081 | *mask = m; |
2082 | *value = v; | |
2083 | if (imask) | |
2084 | *imask |= im; | |
2085 | if (omask) | |
2086 | *omask |= om; | |
2087 | return 1; | |
7005b584 WT |
2088 | } |
2089 | ||
2090 | /* tries to bind a key to the signal name <name>. The key will send the | |
2091 | * strings <press>, <repeat>, <release> for these respective events. | |
2092 | * Returns the pointer to the new key if ok, NULL if the key could not be bound. | |
2093 | */ | |
36d2041a PH |
2094 | static struct logical_input *panel_bind_key(const char *name, const char *press, |
2095 | const char *repeat, | |
2096 | const char *release) | |
698b1515 WT |
2097 | { |
2098 | struct logical_input *key; | |
2099 | ||
fdf4a494 | 2100 | key = kzalloc(sizeof(*key), GFP_KERNEL); |
eb073a9b | 2101 | if (!key) |
698b1515 | 2102 | return NULL; |
eb073a9b | 2103 | |
698b1515 | 2104 | if (!input_name2mask(name, &key->mask, &key->value, &scan_mask_i, |
cb46f472 KV |
2105 | &scan_mask_o)) { |
2106 | kfree(key); | |
698b1515 | 2107 | return NULL; |
cb46f472 | 2108 | } |
698b1515 WT |
2109 | |
2110 | key->type = INPUT_TYPE_KBD; | |
2111 | key->state = INPUT_ST_LOW; | |
2112 | key->rise_time = 1; | |
2113 | key->fall_time = 1; | |
7005b584 | 2114 | |
698b1515 WT |
2115 | strncpy(key->u.kbd.press_str, press, sizeof(key->u.kbd.press_str)); |
2116 | strncpy(key->u.kbd.repeat_str, repeat, sizeof(key->u.kbd.repeat_str)); | |
2117 | strncpy(key->u.kbd.release_str, release, | |
2118 | sizeof(key->u.kbd.release_str)); | |
2119 | list_add(&key->list, &logical_inputs); | |
2120 | return key; | |
7005b584 WT |
2121 | } |
2122 | ||
63023177 | 2123 | #if 0 |
7005b584 WT |
2124 | /* tries to bind a callback function to the signal name <name>. The function |
2125 | * <press_fct> will be called with the <press_data> arg when the signal is | |
2126 | * activated, and so on for <release_fct>/<release_data> | |
429ccf05 HH |
2127 | * Returns the pointer to the new signal if ok, NULL if the signal could not |
2128 | * be bound. | |
7005b584 WT |
2129 | */ |
2130 | static struct logical_input *panel_bind_callback(char *name, | |
68d386bf | 2131 | void (*press_fct)(int), |
698b1515 | 2132 | int press_data, |
68d386bf | 2133 | void (*release_fct)(int), |
698b1515 WT |
2134 | int release_data) |
2135 | { | |
2136 | struct logical_input *callback; | |
2137 | ||
fdf4a494 | 2138 | callback = kmalloc(sizeof(*callback), GFP_KERNEL); |
eb073a9b | 2139 | if (!callback) |
698b1515 | 2140 | return NULL; |
eb073a9b | 2141 | |
698b1515 WT |
2142 | memset(callback, 0, sizeof(struct logical_input)); |
2143 | if (!input_name2mask(name, &callback->mask, &callback->value, | |
2144 | &scan_mask_i, &scan_mask_o)) | |
2145 | return NULL; | |
2146 | ||
2147 | callback->type = INPUT_TYPE_STD; | |
2148 | callback->state = INPUT_ST_LOW; | |
2149 | callback->rise_time = 1; | |
2150 | callback->fall_time = 1; | |
2151 | callback->u.std.press_fct = press_fct; | |
2152 | callback->u.std.press_data = press_data; | |
2153 | callback->u.std.release_fct = release_fct; | |
2154 | callback->u.std.release_data = release_data; | |
2155 | list_add(&callback->list, &logical_inputs); | |
2156 | return callback; | |
7005b584 | 2157 | } |
63023177 | 2158 | #endif |
7005b584 | 2159 | |
698b1515 WT |
2160 | static void keypad_init(void) |
2161 | { | |
2162 | int keynum; | |
c3ed0afc | 2163 | |
698b1515 WT |
2164 | init_waitqueue_head(&keypad_read_wait); |
2165 | keypad_buflen = 0; /* flushes any eventual noisy keystroke */ | |
7005b584 | 2166 | |
698b1515 | 2167 | /* Let's create all known keys */ |
7005b584 | 2168 | |
698b1515 WT |
2169 | for (keynum = 0; keypad_profile[keynum][0][0]; keynum++) { |
2170 | panel_bind_key(keypad_profile[keynum][0], | |
2171 | keypad_profile[keynum][1], | |
2172 | keypad_profile[keynum][2], | |
2173 | keypad_profile[keynum][3]); | |
2174 | } | |
7005b584 | 2175 | |
698b1515 WT |
2176 | init_scan_timer(); |
2177 | keypad_initialized = 1; | |
7005b584 WT |
2178 | } |
2179 | ||
7005b584 WT |
2180 | /**************************************************/ |
2181 | /* device initialization */ | |
2182 | /**************************************************/ | |
2183 | ||
698b1515 WT |
2184 | static int panel_notify_sys(struct notifier_block *this, unsigned long code, |
2185 | void *unused) | |
2186 | { | |
6d8b588c | 2187 | if (lcd.enabled && lcd.initialized) { |
698b1515 WT |
2188 | switch (code) { |
2189 | case SYS_DOWN: | |
2190 | panel_lcd_print | |
2191 | ("\x0cReloading\nSystem...\x1b[Lc\x1b[Lb\x1b[L+"); | |
2192 | break; | |
2193 | case SYS_HALT: | |
2194 | panel_lcd_print | |
2195 | ("\x0cSystem Halted.\x1b[Lc\x1b[Lb\x1b[L+"); | |
2196 | break; | |
2197 | case SYS_POWER_OFF: | |
2198 | panel_lcd_print("\x0cPower off.\x1b[Lc\x1b[Lb\x1b[L+"); | |
2199 | break; | |
2200 | default: | |
2201 | break; | |
2202 | } | |
7005b584 | 2203 | } |
698b1515 | 2204 | return NOTIFY_DONE; |
7005b584 WT |
2205 | } |
2206 | ||
2207 | static struct notifier_block panel_notifier = { | |
2208 | panel_notify_sys, | |
2209 | NULL, | |
2210 | 0 | |
2211 | }; | |
2212 | ||
698b1515 | 2213 | static void panel_attach(struct parport *port) |
7005b584 | 2214 | { |
9be83c0a SM |
2215 | struct pardev_cb panel_cb; |
2216 | ||
698b1515 WT |
2217 | if (port->number != parport) |
2218 | return; | |
2219 | ||
2220 | if (pprt) { | |
eb073a9b TY |
2221 | pr_err("%s: port->number=%d parport=%d, already registered!\n", |
2222 | __func__, port->number, parport); | |
698b1515 WT |
2223 | return; |
2224 | } | |
2225 | ||
9be83c0a SM |
2226 | memset(&panel_cb, 0, sizeof(panel_cb)); |
2227 | panel_cb.private = &pprt; | |
2228 | /* panel_cb.flags = 0 should be PARPORT_DEV_EXCL? */ | |
2229 | ||
2230 | pprt = parport_register_dev_model(port, "panel", &panel_cb, 0); | |
b565b3fb | 2231 | if (!pprt) { |
eb073a9b TY |
2232 | pr_err("%s: port->number=%d parport=%d, parport_register_device() failed\n", |
2233 | __func__, port->number, parport); | |
10f3f5b7 KV |
2234 | return; |
2235 | } | |
698b1515 WT |
2236 | |
2237 | if (parport_claim(pprt)) { | |
eb073a9b TY |
2238 | pr_err("could not claim access to parport%d. Aborting.\n", |
2239 | parport); | |
10f3f5b7 | 2240 | goto err_unreg_device; |
698b1515 WT |
2241 | } |
2242 | ||
429ccf05 HH |
2243 | /* must init LCD first, just in case an IRQ from the keypad is |
2244 | * generated at keypad init | |
2245 | */ | |
a8b2580b | 2246 | if (lcd.enabled) { |
698b1515 | 2247 | lcd_init(); |
10f3f5b7 KV |
2248 | if (misc_register(&lcd_dev)) |
2249 | goto err_unreg_device; | |
698b1515 WT |
2250 | } |
2251 | ||
a8b2580b | 2252 | if (keypad.enabled) { |
698b1515 | 2253 | keypad_init(); |
10f3f5b7 KV |
2254 | if (misc_register(&keypad_dev)) |
2255 | goto err_lcd_unreg; | |
698b1515 | 2256 | } |
bb046fef | 2257 | register_reboot_notifier(&panel_notifier); |
10f3f5b7 KV |
2258 | return; |
2259 | ||
2260 | err_lcd_unreg: | |
a8b2580b | 2261 | if (lcd.enabled) |
10f3f5b7 KV |
2262 | misc_deregister(&lcd_dev); |
2263 | err_unreg_device: | |
2264 | parport_unregister_device(pprt); | |
2265 | pprt = NULL; | |
7005b584 WT |
2266 | } |
2267 | ||
698b1515 | 2268 | static void panel_detach(struct parport *port) |
7005b584 | 2269 | { |
698b1515 WT |
2270 | if (port->number != parport) |
2271 | return; | |
2272 | ||
2273 | if (!pprt) { | |
eb073a9b TY |
2274 | pr_err("%s: port->number=%d parport=%d, nothing to unregister.\n", |
2275 | __func__, port->number, parport); | |
698b1515 WT |
2276 | return; |
2277 | } | |
b565b3fb | 2278 | if (scan_timer.function) |
7d98c63e | 2279 | del_timer_sync(&scan_timer); |
698b1515 | 2280 | |
b565b3fb | 2281 | if (pprt) { |
7d98c63e SM |
2282 | if (keypad.enabled) { |
2283 | misc_deregister(&keypad_dev); | |
2284 | keypad_initialized = 0; | |
2285 | } | |
bb046fef | 2286 | |
7d98c63e SM |
2287 | if (lcd.enabled) { |
2288 | panel_lcd_print("\x0cLCD driver " PANEL_VERSION | |
2289 | "\nunloaded.\x1b[Lc\x1b[Lb\x1b[L-"); | |
2290 | misc_deregister(&lcd_dev); | |
2291 | lcd.initialized = false; | |
2292 | } | |
698b1515 | 2293 | |
7d98c63e SM |
2294 | /* TODO: free all input signals */ |
2295 | parport_release(pprt); | |
2296 | parport_unregister_device(pprt); | |
2297 | pprt = NULL; | |
2298 | unregister_reboot_notifier(&panel_notifier); | |
0b0595bf | 2299 | } |
7005b584 WT |
2300 | } |
2301 | ||
2302 | static struct parport_driver panel_driver = { | |
698b1515 | 2303 | .name = "panel", |
9be83c0a | 2304 | .match_port = panel_attach, |
698b1515 | 2305 | .detach = panel_detach, |
9be83c0a | 2306 | .devmodel = true, |
7005b584 WT |
2307 | }; |
2308 | ||
2309 | /* init function */ | |
d9114767 | 2310 | static int __init panel_init_module(void) |
698b1515 | 2311 | { |
e134201b | 2312 | int selected_keypad_type = NOT_SET, err; |
698b1515 | 2313 | |
698b1515 WT |
2314 | /* take care of an eventual profile */ |
2315 | switch (profile) { | |
429ccf05 HH |
2316 | case PANEL_PROFILE_CUSTOM: |
2317 | /* custom profile */ | |
87b8e0c8 MG |
2318 | selected_keypad_type = DEFAULT_KEYPAD_TYPE; |
2319 | selected_lcd_type = DEFAULT_LCD_TYPE; | |
698b1515 | 2320 | break; |
429ccf05 HH |
2321 | case PANEL_PROFILE_OLD: |
2322 | /* 8 bits, 2*16, old keypad */ | |
87b8e0c8 MG |
2323 | selected_keypad_type = KEYPAD_TYPE_OLD; |
2324 | selected_lcd_type = LCD_TYPE_OLD; | |
2325 | ||
2326 | /* TODO: This two are a little hacky, sort it out later */ | |
2d35bcf6 | 2327 | if (lcd_width == NOT_SET) |
698b1515 | 2328 | lcd_width = 16; |
2d35bcf6 | 2329 | if (lcd_hwidth == NOT_SET) |
698b1515 WT |
2330 | lcd_hwidth = 16; |
2331 | break; | |
429ccf05 HH |
2332 | case PANEL_PROFILE_NEW: |
2333 | /* serial, 2*16, new keypad */ | |
87b8e0c8 MG |
2334 | selected_keypad_type = KEYPAD_TYPE_NEW; |
2335 | selected_lcd_type = LCD_TYPE_KS0074; | |
698b1515 | 2336 | break; |
429ccf05 HH |
2337 | case PANEL_PROFILE_HANTRONIX: |
2338 | /* 8 bits, 2*16 hantronix-like, no keypad */ | |
87b8e0c8 MG |
2339 | selected_keypad_type = KEYPAD_TYPE_NONE; |
2340 | selected_lcd_type = LCD_TYPE_HANTRONIX; | |
698b1515 | 2341 | break; |
429ccf05 HH |
2342 | case PANEL_PROFILE_NEXCOM: |
2343 | /* generic 8 bits, 2*16, nexcom keypad, eg. Nexcom. */ | |
87b8e0c8 MG |
2344 | selected_keypad_type = KEYPAD_TYPE_NEXCOM; |
2345 | selected_lcd_type = LCD_TYPE_NEXCOM; | |
698b1515 | 2346 | break; |
429ccf05 HH |
2347 | case PANEL_PROFILE_LARGE: |
2348 | /* 8 bits, 2*40, old keypad */ | |
87b8e0c8 MG |
2349 | selected_keypad_type = KEYPAD_TYPE_OLD; |
2350 | selected_lcd_type = LCD_TYPE_OLD; | |
698b1515 WT |
2351 | break; |
2352 | } | |
2353 | ||
87b8e0c8 MG |
2354 | /* |
2355 | * Overwrite selection with module param values (both keypad and lcd), | |
2356 | * where the deprecated params have lower prio. | |
2357 | */ | |
1a4b2e3e | 2358 | if (keypad_enabled != NOT_SET) |
87b8e0c8 | 2359 | selected_keypad_type = keypad_enabled; |
1a4b2e3e | 2360 | if (keypad_type != NOT_SET) |
87b8e0c8 MG |
2361 | selected_keypad_type = keypad_type; |
2362 | ||
2363 | keypad.enabled = (selected_keypad_type > 0); | |
2364 | ||
1a4b2e3e | 2365 | if (lcd_enabled != NOT_SET) |
87b8e0c8 | 2366 | selected_lcd_type = lcd_enabled; |
1a4b2e3e | 2367 | if (lcd_type != NOT_SET) |
87b8e0c8 MG |
2368 | selected_lcd_type = lcd_type; |
2369 | ||
2370 | lcd.enabled = (selected_lcd_type > 0); | |
698b1515 | 2371 | |
733345ec SM |
2372 | if (lcd.enabled) { |
2373 | /* | |
2374 | * Init lcd struct with load-time values to preserve exact | |
2375 | * current functionality (at least for now). | |
2376 | */ | |
2377 | lcd.height = lcd_height; | |
2378 | lcd.width = lcd_width; | |
2379 | lcd.bwidth = lcd_bwidth; | |
2380 | lcd.hwidth = lcd_hwidth; | |
2381 | lcd.charset = lcd_charset; | |
2382 | lcd.proto = lcd_proto; | |
2383 | lcd.pins.e = lcd_e_pin; | |
2384 | lcd.pins.rs = lcd_rs_pin; | |
2385 | lcd.pins.rw = lcd_rw_pin; | |
2386 | lcd.pins.cl = lcd_cl_pin; | |
2387 | lcd.pins.da = lcd_da_pin; | |
2388 | lcd.pins.bl = lcd_bl_pin; | |
2389 | ||
2390 | /* Leave it for now, just in case */ | |
2391 | lcd.esc_seq.len = -1; | |
2392 | } | |
2393 | ||
87b8e0c8 | 2394 | switch (selected_keypad_type) { |
698b1515 WT |
2395 | case KEYPAD_TYPE_OLD: |
2396 | keypad_profile = old_keypad_profile; | |
2397 | break; | |
2398 | case KEYPAD_TYPE_NEW: | |
2399 | keypad_profile = new_keypad_profile; | |
2400 | break; | |
2401 | case KEYPAD_TYPE_NEXCOM: | |
2402 | keypad_profile = nexcom_keypad_profile; | |
2403 | break; | |
2404 | default: | |
2405 | keypad_profile = NULL; | |
2406 | break; | |
2407 | } | |
2408 | ||
a8b2580b | 2409 | if (!lcd.enabled && !keypad.enabled) { |
f43de77c | 2410 | /* no device enabled, let's exit */ |
eb073a9b | 2411 | pr_err("driver version " PANEL_VERSION " disabled.\n"); |
698b1515 | 2412 | return -ENODEV; |
7005b584 | 2413 | } |
7005b584 | 2414 | |
e134201b SM |
2415 | err = parport_register_driver(&panel_driver); |
2416 | if (err) { | |
f43de77c | 2417 | pr_err("could not register with parport. Aborting.\n"); |
e134201b | 2418 | return err; |
f43de77c SM |
2419 | } |
2420 | ||
698b1515 | 2421 | if (pprt) |
493aa896 TY |
2422 | pr_info("driver version " PANEL_VERSION |
2423 | " registered on parport%d (io=0x%lx).\n", parport, | |
2424 | pprt->port->base); | |
698b1515 | 2425 | else |
493aa896 TY |
2426 | pr_info("driver version " PANEL_VERSION |
2427 | " not yet registered\n"); | |
698b1515 WT |
2428 | return 0; |
2429 | } | |
7005b584 | 2430 | |
f6d1fcfe | 2431 | static void __exit panel_cleanup_module(void) |
698b1515 | 2432 | { |
698b1515 | 2433 | parport_unregister_driver(&panel_driver); |
7005b584 | 2434 | } |
7005b584 | 2435 | |
7005b584 WT |
2436 | module_init(panel_init_module); |
2437 | module_exit(panel_cleanup_module); | |
2438 | MODULE_AUTHOR("Willy Tarreau"); | |
2439 | MODULE_LICENSE("GPL"); | |
7005b584 WT |
2440 | |
2441 | /* | |
2442 | * Local variables: | |
2443 | * c-indent-level: 4 | |
2444 | * tab-width: 8 | |
2445 | * End: | |
2446 | */ |