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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); | |
ebd43516 SS |
828 | /* the shortest command takes at least 40 us */ |
829 | usleep_range(40, 100); | |
d4d2dbca | 830 | spin_unlock_irq(&pprt_lock); |
7005b584 WT |
831 | } |
832 | ||
833 | /* send data to the LCD panel in serial mode */ | |
698b1515 WT |
834 | static void lcd_write_data_s(int data) |
835 | { | |
d4d2dbca | 836 | spin_lock_irq(&pprt_lock); |
698b1515 WT |
837 | lcd_send_serial(0x5F); /* R/W=W, RS=1 */ |
838 | lcd_send_serial(data & 0x0F); | |
839 | lcd_send_serial((data >> 4) & 0x0F); | |
ebd43516 SS |
840 | /* the shortest data takes at least 40 us */ |
841 | usleep_range(40, 100); | |
d4d2dbca | 842 | spin_unlock_irq(&pprt_lock); |
7005b584 WT |
843 | } |
844 | ||
845 | /* send a command to the LCD panel in 8 bits parallel mode */ | |
698b1515 WT |
846 | static void lcd_write_cmd_p8(int cmd) |
847 | { | |
d4d2dbca | 848 | spin_lock_irq(&pprt_lock); |
698b1515 WT |
849 | /* present the data to the data port */ |
850 | w_dtr(pprt, cmd); | |
ebd43516 SS |
851 | /* maintain the data during 20 us before the strobe */ |
852 | usleep_range(20, 100); | |
7005b584 | 853 | |
698b1515 WT |
854 | bits.e = BIT_SET; |
855 | bits.rs = BIT_CLR; | |
856 | bits.rw = BIT_CLR; | |
857 | set_ctrl_bits(); | |
7005b584 | 858 | |
ebd43516 | 859 | usleep_range(40, 100); /* maintain the strobe during 40 us */ |
7005b584 | 860 | |
698b1515 WT |
861 | bits.e = BIT_CLR; |
862 | set_ctrl_bits(); | |
7005b584 | 863 | |
ebd43516 | 864 | usleep_range(120, 500); /* the shortest command takes at least 120 us */ |
d4d2dbca | 865 | spin_unlock_irq(&pprt_lock); |
7005b584 WT |
866 | } |
867 | ||
868 | /* send data to the LCD panel in 8 bits parallel mode */ | |
698b1515 WT |
869 | static void lcd_write_data_p8(int data) |
870 | { | |
d4d2dbca | 871 | spin_lock_irq(&pprt_lock); |
698b1515 WT |
872 | /* present the data to the data port */ |
873 | w_dtr(pprt, data); | |
ebd43516 SS |
874 | /* maintain the data during 20 us before the strobe */ |
875 | usleep_range(20, 100); | |
7005b584 | 876 | |
698b1515 WT |
877 | bits.e = BIT_SET; |
878 | bits.rs = BIT_SET; | |
879 | bits.rw = BIT_CLR; | |
880 | set_ctrl_bits(); | |
7005b584 | 881 | |
ebd43516 | 882 | usleep_range(40, 100); /* maintain the strobe during 40 us */ |
7005b584 | 883 | |
698b1515 WT |
884 | bits.e = BIT_CLR; |
885 | set_ctrl_bits(); | |
7005b584 | 886 | |
ebd43516 | 887 | usleep_range(45, 100); /* the shortest data takes at least 45 us */ |
d4d2dbca | 888 | spin_unlock_irq(&pprt_lock); |
7005b584 WT |
889 | } |
890 | ||
77943d31 SR |
891 | /* send a command to the TI LCD panel */ |
892 | static void lcd_write_cmd_tilcd(int cmd) | |
893 | { | |
d4d2dbca | 894 | spin_lock_irq(&pprt_lock); |
77943d31 SR |
895 | /* present the data to the control port */ |
896 | w_ctr(pprt, cmd); | |
ebd43516 | 897 | usleep_range(60, 120); |
d4d2dbca | 898 | spin_unlock_irq(&pprt_lock); |
77943d31 SR |
899 | } |
900 | ||
901 | /* send data to the TI LCD panel */ | |
902 | static void lcd_write_data_tilcd(int data) | |
903 | { | |
d4d2dbca | 904 | spin_lock_irq(&pprt_lock); |
77943d31 SR |
905 | /* present the data to the data port */ |
906 | w_dtr(pprt, data); | |
ebd43516 | 907 | usleep_range(60, 120); |
d4d2dbca | 908 | spin_unlock_irq(&pprt_lock); |
77943d31 SR |
909 | } |
910 | ||
698b1515 WT |
911 | static void lcd_gotoxy(void) |
912 | { | |
2114924a | 913 | lcd_write_cmd(LCD_CMD_SET_DDRAM_ADDR |
6d8b588c | 914 | | (lcd.addr.y ? lcd.hwidth : 0) |
8c17893c NB |
915 | /* |
916 | * we force the cursor to stay at the end of the | |
917 | * line if it wants to go farther | |
918 | */ | |
6d8b588c | 919 | | ((lcd.addr.x < lcd.bwidth) ? lcd.addr.x & |
8037e2a3 | 920 | (lcd.hwidth - 1) : lcd.bwidth - 1)); |
7005b584 WT |
921 | } |
922 | ||
698b1515 WT |
923 | static void lcd_print(char c) |
924 | { | |
6d8b588c | 925 | if (lcd.addr.x < lcd.bwidth) { |
b565b3fb | 926 | if (lcd_char_conv) |
698b1515 WT |
927 | c = lcd_char_conv[(unsigned char)c]; |
928 | lcd_write_data(c); | |
6d8b588c | 929 | lcd.addr.x++; |
698b1515 WT |
930 | } |
931 | /* prevents the cursor from wrapping onto the next line */ | |
6d8b588c | 932 | if (lcd.addr.x == lcd.bwidth) |
698b1515 | 933 | lcd_gotoxy(); |
7005b584 WT |
934 | } |
935 | ||
936 | /* fills the display with spaces and resets X/Y */ | |
698b1515 WT |
937 | static void lcd_clear_fast_s(void) |
938 | { | |
939 | int pos; | |
c3ed0afc | 940 | |
6d8b588c MG |
941 | lcd.addr.x = 0; |
942 | lcd.addr.y = 0; | |
698b1515 WT |
943 | lcd_gotoxy(); |
944 | ||
d4d2dbca | 945 | spin_lock_irq(&pprt_lock); |
8037e2a3 | 946 | for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) { |
698b1515 WT |
947 | lcd_send_serial(0x5F); /* R/W=W, RS=1 */ |
948 | lcd_send_serial(' ' & 0x0F); | |
949 | lcd_send_serial((' ' >> 4) & 0x0F); | |
df44f150 RR |
950 | /* the shortest data takes at least 40 us */ |
951 | usleep_range(40, 100); | |
698b1515 | 952 | } |
d4d2dbca | 953 | spin_unlock_irq(&pprt_lock); |
698b1515 | 954 | |
6d8b588c MG |
955 | lcd.addr.x = 0; |
956 | lcd.addr.y = 0; | |
698b1515 | 957 | lcd_gotoxy(); |
7005b584 WT |
958 | } |
959 | ||
960 | /* fills the display with spaces and resets X/Y */ | |
698b1515 WT |
961 | static void lcd_clear_fast_p8(void) |
962 | { | |
963 | int pos; | |
c3ed0afc | 964 | |
6d8b588c MG |
965 | lcd.addr.x = 0; |
966 | lcd.addr.y = 0; | |
698b1515 | 967 | lcd_gotoxy(); |
7005b584 | 968 | |
d4d2dbca | 969 | spin_lock_irq(&pprt_lock); |
8037e2a3 | 970 | for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) { |
698b1515 WT |
971 | /* present the data to the data port */ |
972 | w_dtr(pprt, ' '); | |
429ccf05 HH |
973 | |
974 | /* maintain the data during 20 us before the strobe */ | |
ebd43516 | 975 | usleep_range(20, 100); |
7005b584 | 976 | |
698b1515 WT |
977 | bits.e = BIT_SET; |
978 | bits.rs = BIT_SET; | |
979 | bits.rw = BIT_CLR; | |
980 | set_ctrl_bits(); | |
7005b584 | 981 | |
429ccf05 | 982 | /* maintain the strobe during 40 us */ |
ebd43516 | 983 | usleep_range(40, 100); |
7005b584 | 984 | |
698b1515 WT |
985 | bits.e = BIT_CLR; |
986 | set_ctrl_bits(); | |
7005b584 | 987 | |
429ccf05 | 988 | /* the shortest data takes at least 45 us */ |
ebd43516 | 989 | usleep_range(45, 100); |
698b1515 | 990 | } |
d4d2dbca | 991 | spin_unlock_irq(&pprt_lock); |
7005b584 | 992 | |
6d8b588c MG |
993 | lcd.addr.x = 0; |
994 | lcd.addr.y = 0; | |
698b1515 | 995 | lcd_gotoxy(); |
7005b584 WT |
996 | } |
997 | ||
77943d31 SR |
998 | /* fills the display with spaces and resets X/Y */ |
999 | static void lcd_clear_fast_tilcd(void) | |
1000 | { | |
1001 | int pos; | |
c3ed0afc | 1002 | |
6d8b588c MG |
1003 | lcd.addr.x = 0; |
1004 | lcd.addr.y = 0; | |
77943d31 SR |
1005 | lcd_gotoxy(); |
1006 | ||
d4d2dbca | 1007 | spin_lock_irq(&pprt_lock); |
8037e2a3 | 1008 | for (pos = 0; pos < lcd.height * lcd.hwidth; pos++) { |
77943d31 SR |
1009 | /* present the data to the data port */ |
1010 | w_dtr(pprt, ' '); | |
ebd43516 | 1011 | usleep_range(60, 120); |
77943d31 SR |
1012 | } |
1013 | ||
d4d2dbca | 1014 | spin_unlock_irq(&pprt_lock); |
77943d31 | 1015 | |
6d8b588c MG |
1016 | lcd.addr.x = 0; |
1017 | lcd.addr.y = 0; | |
77943d31 SR |
1018 | lcd_gotoxy(); |
1019 | } | |
1020 | ||
7005b584 | 1021 | /* clears the display and resets X/Y */ |
698b1515 WT |
1022 | static void lcd_clear_display(void) |
1023 | { | |
2114924a | 1024 | lcd_write_cmd(LCD_CMD_DISPLAY_CLEAR); |
6d8b588c MG |
1025 | lcd.addr.x = 0; |
1026 | lcd.addr.y = 0; | |
698b1515 WT |
1027 | /* we must wait a few milliseconds (15) */ |
1028 | long_sleep(15); | |
7005b584 WT |
1029 | } |
1030 | ||
698b1515 WT |
1031 | static void lcd_init_display(void) |
1032 | { | |
6d8b588c | 1033 | lcd.flags = ((lcd.height > 1) ? LCD_FLAG_N : 0) |
698b1515 | 1034 | | LCD_FLAG_D | LCD_FLAG_C | LCD_FLAG_B; |
7005b584 | 1035 | |
698b1515 | 1036 | long_sleep(20); /* wait 20 ms after power-up for the paranoid */ |
7005b584 | 1037 | |
2114924a MG |
1038 | /* 8bits, 1 line, small fonts; let's do it 3 times */ |
1039 | lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS); | |
698b1515 | 1040 | long_sleep(10); |
2114924a | 1041 | lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS); |
698b1515 | 1042 | long_sleep(10); |
2114924a | 1043 | lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS); |
698b1515 | 1044 | long_sleep(10); |
7005b584 | 1045 | |
2114924a MG |
1046 | /* set font height and lines number */ |
1047 | lcd_write_cmd(LCD_CMD_FUNCTION_SET | LCD_CMD_DATA_LEN_8BITS | |
1048 | | ((lcd.flags & LCD_FLAG_F) ? LCD_CMD_FONT_5X10_DOTS : 0) | |
1049 | | ((lcd.flags & LCD_FLAG_N) ? LCD_CMD_TWO_LINES : 0) | |
698b1515 WT |
1050 | ); |
1051 | long_sleep(10); | |
7005b584 | 1052 | |
2114924a MG |
1053 | /* display off, cursor off, blink off */ |
1054 | lcd_write_cmd(LCD_CMD_DISPLAY_CTRL); | |
698b1515 | 1055 | long_sleep(10); |
7005b584 | 1056 | |
2114924a MG |
1057 | lcd_write_cmd(LCD_CMD_DISPLAY_CTRL /* set display mode */ |
1058 | | ((lcd.flags & LCD_FLAG_D) ? LCD_CMD_DISPLAY_ON : 0) | |
1059 | | ((lcd.flags & LCD_FLAG_C) ? LCD_CMD_CURSOR_ON : 0) | |
1060 | | ((lcd.flags & LCD_FLAG_B) ? LCD_CMD_BLINK_ON : 0) | |
698b1515 | 1061 | ); |
7005b584 | 1062 | |
6d8b588c | 1063 | lcd_backlight((lcd.flags & LCD_FLAG_L) ? 1 : 0); |
7005b584 | 1064 | |
698b1515 | 1065 | long_sleep(10); |
7005b584 | 1066 | |
429ccf05 | 1067 | /* entry mode set : increment, cursor shifting */ |
2114924a | 1068 | lcd_write_cmd(LCD_CMD_ENTRY_MODE | LCD_CMD_CURSOR_INC); |
7005b584 | 1069 | |
698b1515 | 1070 | lcd_clear_display(); |
7005b584 WT |
1071 | } |
1072 | ||
1073 | /* | |
1074 | * These are the file operation function for user access to /dev/lcd | |
1075 | * This function can also be called from inside the kernel, by | |
1076 | * setting file and ppos to NULL. | |
1077 | * | |
1078 | */ | |
1079 | ||
429ccf05 HH |
1080 | static inline int handle_lcd_special_code(void) |
1081 | { | |
1082 | /* LCD special codes */ | |
1083 | ||
1084 | int processed = 0; | |
1085 | ||
6d8b588c MG |
1086 | char *esc = lcd.esc_seq.buf + 2; |
1087 | int oldflags = lcd.flags; | |
429ccf05 HH |
1088 | |
1089 | /* check for display mode flags */ | |
1090 | switch (*esc) { | |
1091 | case 'D': /* Display ON */ | |
6d8b588c | 1092 | lcd.flags |= LCD_FLAG_D; |
429ccf05 HH |
1093 | processed = 1; |
1094 | break; | |
1095 | case 'd': /* Display OFF */ | |
6d8b588c | 1096 | lcd.flags &= ~LCD_FLAG_D; |
429ccf05 HH |
1097 | processed = 1; |
1098 | break; | |
1099 | case 'C': /* Cursor ON */ | |
6d8b588c | 1100 | lcd.flags |= LCD_FLAG_C; |
429ccf05 HH |
1101 | processed = 1; |
1102 | break; | |
1103 | case 'c': /* Cursor OFF */ | |
6d8b588c | 1104 | lcd.flags &= ~LCD_FLAG_C; |
429ccf05 HH |
1105 | processed = 1; |
1106 | break; | |
1107 | case 'B': /* Blink ON */ | |
6d8b588c | 1108 | lcd.flags |= LCD_FLAG_B; |
429ccf05 HH |
1109 | processed = 1; |
1110 | break; | |
1111 | case 'b': /* Blink OFF */ | |
6d8b588c | 1112 | lcd.flags &= ~LCD_FLAG_B; |
429ccf05 HH |
1113 | processed = 1; |
1114 | break; | |
1115 | case '+': /* Back light ON */ | |
6d8b588c | 1116 | lcd.flags |= LCD_FLAG_L; |
429ccf05 HH |
1117 | processed = 1; |
1118 | break; | |
1119 | case '-': /* Back light OFF */ | |
6d8b588c | 1120 | lcd.flags &= ~LCD_FLAG_L; |
429ccf05 HH |
1121 | processed = 1; |
1122 | break; | |
1123 | case '*': | |
1124 | /* flash back light using the keypad timer */ | |
b565b3fb | 1125 | if (scan_timer.function) { |
832bf28c SS |
1126 | if (lcd.light_tempo == 0 && |
1127 | ((lcd.flags & LCD_FLAG_L) == 0)) | |
429ccf05 | 1128 | lcd_backlight(1); |
6d8b588c | 1129 | lcd.light_tempo = FLASH_LIGHT_TEMPO; |
429ccf05 HH |
1130 | } |
1131 | processed = 1; | |
1132 | break; | |
1133 | case 'f': /* Small Font */ | |
6d8b588c | 1134 | lcd.flags &= ~LCD_FLAG_F; |
429ccf05 HH |
1135 | processed = 1; |
1136 | break; | |
1137 | case 'F': /* Large Font */ | |
6d8b588c | 1138 | lcd.flags |= LCD_FLAG_F; |
429ccf05 HH |
1139 | processed = 1; |
1140 | break; | |
1141 | case 'n': /* One Line */ | |
6d8b588c | 1142 | lcd.flags &= ~LCD_FLAG_N; |
429ccf05 HH |
1143 | processed = 1; |
1144 | break; | |
1145 | case 'N': /* Two Lines */ | |
6d8b588c | 1146 | lcd.flags |= LCD_FLAG_N; |
429ccf05 HH |
1147 | break; |
1148 | case 'l': /* Shift Cursor Left */ | |
6d8b588c | 1149 | if (lcd.addr.x > 0) { |
429ccf05 | 1150 | /* back one char if not at end of line */ |
6d8b588c | 1151 | if (lcd.addr.x < lcd.bwidth) |
2114924a | 1152 | lcd_write_cmd(LCD_CMD_SHIFT); |
6d8b588c | 1153 | lcd.addr.x--; |
429ccf05 HH |
1154 | } |
1155 | processed = 1; | |
1156 | break; | |
1157 | case 'r': /* shift cursor right */ | |
6d8b588c | 1158 | if (lcd.addr.x < lcd.width) { |
429ccf05 | 1159 | /* allow the cursor to pass the end of the line */ |
2114924a MG |
1160 | if (lcd.addr.x < (lcd.bwidth - 1)) |
1161 | lcd_write_cmd(LCD_CMD_SHIFT | | |
1162 | LCD_CMD_SHIFT_RIGHT); | |
6d8b588c | 1163 | lcd.addr.x++; |
429ccf05 HH |
1164 | } |
1165 | processed = 1; | |
1166 | break; | |
1167 | case 'L': /* shift display left */ | |
2114924a | 1168 | lcd_write_cmd(LCD_CMD_SHIFT | LCD_CMD_DISPLAY_SHIFT); |
429ccf05 HH |
1169 | processed = 1; |
1170 | break; | |
1171 | case 'R': /* shift display right */ | |
2114924a MG |
1172 | lcd_write_cmd(LCD_CMD_SHIFT | LCD_CMD_DISPLAY_SHIFT | |
1173 | LCD_CMD_SHIFT_RIGHT); | |
429ccf05 HH |
1174 | processed = 1; |
1175 | break; | |
1176 | case 'k': { /* kill end of line */ | |
1177 | int x; | |
c3ed0afc | 1178 | |
6d8b588c | 1179 | for (x = lcd.addr.x; x < lcd.bwidth; x++) |
429ccf05 HH |
1180 | lcd_write_data(' '); |
1181 | ||
1182 | /* restore cursor position */ | |
1183 | lcd_gotoxy(); | |
1184 | processed = 1; | |
1185 | break; | |
1186 | } | |
1187 | case 'I': /* reinitialize display */ | |
1188 | lcd_init_display(); | |
429ccf05 HH |
1189 | processed = 1; |
1190 | break; | |
1191 | case 'G': { | |
1192 | /* Generator : LGcxxxxx...xx; must have <c> between '0' | |
1193 | * and '7', representing the numerical ASCII code of the | |
1194 | * redefined character, and <xx...xx> a sequence of 16 | |
1195 | * hex digits representing 8 bytes for each character. | |
1196 | * Most LCDs will only use 5 lower bits of the 7 first | |
1197 | * bytes. | |
1198 | */ | |
1199 | ||
1200 | unsigned char cgbytes[8]; | |
1201 | unsigned char cgaddr; | |
1202 | int cgoffset; | |
1203 | int shift; | |
1204 | char value; | |
1205 | int addr; | |
1206 | ||
b565b3fb | 1207 | if (!strchr(esc, ';')) |
429ccf05 HH |
1208 | break; |
1209 | ||
1210 | esc++; | |
1211 | ||
1212 | cgaddr = *(esc++) - '0'; | |
1213 | if (cgaddr > 7) { | |
1214 | processed = 1; | |
1215 | break; | |
1216 | } | |
1217 | ||
1218 | cgoffset = 0; | |
1219 | shift = 0; | |
1220 | value = 0; | |
1221 | while (*esc && cgoffset < 8) { | |
1222 | shift ^= 4; | |
3ac76904 | 1223 | if (*esc >= '0' && *esc <= '9') { |
429ccf05 | 1224 | value |= (*esc - '0') << shift; |
3ac76904 | 1225 | } else if (*esc >= 'A' && *esc <= 'Z') { |
429ccf05 | 1226 | value |= (*esc - 'A' + 10) << shift; |
3ac76904 | 1227 | } else if (*esc >= 'a' && *esc <= 'z') { |
429ccf05 | 1228 | value |= (*esc - 'a' + 10) << shift; |
3ac76904 | 1229 | } else { |
429ccf05 HH |
1230 | esc++; |
1231 | continue; | |
1232 | } | |
1233 | ||
1234 | if (shift == 0) { | |
1235 | cgbytes[cgoffset++] = value; | |
1236 | value = 0; | |
1237 | } | |
1238 | ||
1239 | esc++; | |
1240 | } | |
1241 | ||
2114924a | 1242 | lcd_write_cmd(LCD_CMD_SET_CGRAM_ADDR | (cgaddr * 8)); |
429ccf05 HH |
1243 | for (addr = 0; addr < cgoffset; addr++) |
1244 | lcd_write_data(cgbytes[addr]); | |
1245 | ||
1246 | /* ensures that we stop writing to CGRAM */ | |
1247 | lcd_gotoxy(); | |
1248 | processed = 1; | |
1249 | break; | |
1250 | } | |
1251 | case 'x': /* gotoxy : LxXXX[yYYY]; */ | |
1252 | case 'y': /* gotoxy : LyYYY[xXXX]; */ | |
b565b3fb | 1253 | if (!strchr(esc, ';')) |
429ccf05 HH |
1254 | break; |
1255 | ||
1256 | while (*esc) { | |
1257 | if (*esc == 'x') { | |
1258 | esc++; | |
6d8b588c | 1259 | if (kstrtoul(esc, 10, &lcd.addr.x) < 0) |
12995706 | 1260 | break; |
429ccf05 HH |
1261 | } else if (*esc == 'y') { |
1262 | esc++; | |
6d8b588c | 1263 | if (kstrtoul(esc, 10, &lcd.addr.y) < 0) |
12995706 | 1264 | break; |
3ac76904 | 1265 | } else { |
429ccf05 | 1266 | break; |
3ac76904 | 1267 | } |
429ccf05 HH |
1268 | } |
1269 | ||
1270 | lcd_gotoxy(); | |
1271 | processed = 1; | |
1272 | break; | |
1273 | } | |
1274 | ||
2114924a | 1275 | /* TODO: This indent party here got ugly, clean it! */ |
f2635894 | 1276 | /* Check whether one flag was changed */ |
6d8b588c | 1277 | if (oldflags != lcd.flags) { |
429ccf05 | 1278 | /* check whether one of B,C,D flags were changed */ |
6d8b588c | 1279 | if ((oldflags ^ lcd.flags) & |
429ccf05 HH |
1280 | (LCD_FLAG_B | LCD_FLAG_C | LCD_FLAG_D)) |
1281 | /* set display mode */ | |
2114924a MG |
1282 | lcd_write_cmd(LCD_CMD_DISPLAY_CTRL |
1283 | | ((lcd.flags & LCD_FLAG_D) | |
1284 | ? LCD_CMD_DISPLAY_ON : 0) | |
1285 | | ((lcd.flags & LCD_FLAG_C) | |
1286 | ? LCD_CMD_CURSOR_ON : 0) | |
1287 | | ((lcd.flags & LCD_FLAG_B) | |
1288 | ? LCD_CMD_BLINK_ON : 0)); | |
429ccf05 | 1289 | /* check whether one of F,N flags was changed */ |
6d8b588c | 1290 | else if ((oldflags ^ lcd.flags) & (LCD_FLAG_F | LCD_FLAG_N)) |
2114924a MG |
1291 | lcd_write_cmd(LCD_CMD_FUNCTION_SET |
1292 | | LCD_CMD_DATA_LEN_8BITS | |
1293 | | ((lcd.flags & LCD_FLAG_F) | |
1294 | ? LCD_CMD_TWO_LINES : 0) | |
1295 | | ((lcd.flags & LCD_FLAG_N) | |
1296 | ? LCD_CMD_FONT_5X10_DOTS | |
1297 | : 0)); | |
f2635894 | 1298 | /* check whether L flag was changed */ |
6d8b588c MG |
1299 | else if ((oldflags ^ lcd.flags) & (LCD_FLAG_L)) { |
1300 | if (lcd.flags & (LCD_FLAG_L)) | |
429ccf05 | 1301 | lcd_backlight(1); |
6d8b588c | 1302 | else if (lcd.light_tempo == 0) |
8c17893c NB |
1303 | /* |
1304 | * switch off the light only when the tempo | |
1305 | * lighting is gone | |
1306 | */ | |
429ccf05 HH |
1307 | lcd_backlight(0); |
1308 | } | |
1309 | } | |
1310 | ||
1311 | return processed; | |
1312 | } | |
1313 | ||
70a8c3eb BA |
1314 | static void lcd_write_char(char c) |
1315 | { | |
1316 | /* first, we'll test if we're in escape mode */ | |
6d8b588c | 1317 | if ((c != '\n') && lcd.esc_seq.len >= 0) { |
70a8c3eb | 1318 | /* yes, let's add this char to the buffer */ |
6d8b588c MG |
1319 | lcd.esc_seq.buf[lcd.esc_seq.len++] = c; |
1320 | lcd.esc_seq.buf[lcd.esc_seq.len] = 0; | |
70a8c3eb BA |
1321 | } else { |
1322 | /* aborts any previous escape sequence */ | |
6d8b588c | 1323 | lcd.esc_seq.len = -1; |
70a8c3eb BA |
1324 | |
1325 | switch (c) { | |
1326 | case LCD_ESCAPE_CHAR: | |
1327 | /* start of an escape sequence */ | |
6d8b588c MG |
1328 | lcd.esc_seq.len = 0; |
1329 | lcd.esc_seq.buf[lcd.esc_seq.len] = 0; | |
70a8c3eb BA |
1330 | break; |
1331 | case '\b': | |
1332 | /* go back one char and clear it */ | |
6d8b588c | 1333 | if (lcd.addr.x > 0) { |
8c17893c NB |
1334 | /* |
1335 | * check if we're not at the | |
1336 | * end of the line | |
1337 | */ | |
6d8b588c | 1338 | if (lcd.addr.x < lcd.bwidth) |
70a8c3eb | 1339 | /* back one char */ |
2114924a | 1340 | lcd_write_cmd(LCD_CMD_SHIFT); |
6d8b588c | 1341 | lcd.addr.x--; |
70a8c3eb BA |
1342 | } |
1343 | /* replace with a space */ | |
1344 | lcd_write_data(' '); | |
1345 | /* back one char again */ | |
2114924a | 1346 | lcd_write_cmd(LCD_CMD_SHIFT); |
70a8c3eb BA |
1347 | break; |
1348 | case '\014': | |
1349 | /* quickly clear the display */ | |
1350 | lcd_clear_fast(); | |
1351 | break; | |
1352 | case '\n': | |
8c17893c NB |
1353 | /* |
1354 | * flush the remainder of the current line and | |
1355 | * go to the beginning of the next line | |
1356 | */ | |
6d8b588c | 1357 | for (; lcd.addr.x < lcd.bwidth; lcd.addr.x++) |
70a8c3eb | 1358 | lcd_write_data(' '); |
6d8b588c MG |
1359 | lcd.addr.x = 0; |
1360 | lcd.addr.y = (lcd.addr.y + 1) % lcd.height; | |
70a8c3eb BA |
1361 | lcd_gotoxy(); |
1362 | break; | |
1363 | case '\r': | |
1364 | /* go to the beginning of the same line */ | |
6d8b588c | 1365 | lcd.addr.x = 0; |
70a8c3eb BA |
1366 | lcd_gotoxy(); |
1367 | break; | |
1368 | case '\t': | |
1369 | /* print a space instead of the tab */ | |
1370 | lcd_print(' '); | |
1371 | break; | |
1372 | default: | |
1373 | /* simply print this char */ | |
1374 | lcd_print(c); | |
1375 | break; | |
1376 | } | |
1377 | } | |
1378 | ||
8c17893c NB |
1379 | /* |
1380 | * now we'll see if we're in an escape mode and if the current | |
1381 | * escape sequence can be understood. | |
1382 | */ | |
6d8b588c | 1383 | if (lcd.esc_seq.len >= 2) { |
70a8c3eb BA |
1384 | int processed = 0; |
1385 | ||
6d8b588c | 1386 | if (!strcmp(lcd.esc_seq.buf, "[2J")) { |
70a8c3eb BA |
1387 | /* clear the display */ |
1388 | lcd_clear_fast(); | |
1389 | processed = 1; | |
6d8b588c | 1390 | } else if (!strcmp(lcd.esc_seq.buf, "[H")) { |
70a8c3eb | 1391 | /* cursor to home */ |
6d8b588c MG |
1392 | lcd.addr.x = 0; |
1393 | lcd.addr.y = 0; | |
70a8c3eb BA |
1394 | lcd_gotoxy(); |
1395 | processed = 1; | |
1396 | } | |
1397 | /* codes starting with ^[[L */ | |
6d8b588c MG |
1398 | else if ((lcd.esc_seq.len >= 3) && |
1399 | (lcd.esc_seq.buf[0] == '[') && | |
1400 | (lcd.esc_seq.buf[1] == 'L')) { | |
70a8c3eb BA |
1401 | processed = handle_lcd_special_code(); |
1402 | } | |
1403 | ||
1404 | /* LCD special escape codes */ | |
8c17893c NB |
1405 | /* |
1406 | * flush the escape sequence if it's been processed | |
1407 | * or if it is getting too long. | |
1408 | */ | |
6d8b588c MG |
1409 | if (processed || (lcd.esc_seq.len >= LCD_ESCAPE_LEN)) |
1410 | lcd.esc_seq.len = -1; | |
70a8c3eb BA |
1411 | } /* escape codes */ |
1412 | } | |
1413 | ||
698b1515 | 1414 | static ssize_t lcd_write(struct file *file, |
fdf4a494 | 1415 | const char __user *buf, size_t count, loff_t *ppos) |
698b1515 | 1416 | { |
70a8c3eb | 1417 | const char __user *tmp = buf; |
698b1515 WT |
1418 | char c; |
1419 | ||
70a8c3eb | 1420 | for (; count-- > 0; (*ppos)++, tmp++) { |
698b1515 | 1421 | if (!in_interrupt() && (((count + 1) & 0x1f) == 0)) |
8c17893c NB |
1422 | /* |
1423 | * let's be a little nice with other processes | |
1424 | * that need some CPU | |
1425 | */ | |
429ccf05 | 1426 | schedule(); |
698b1515 | 1427 | |
6a4193a2 | 1428 | if (get_user(c, tmp)) |
698b1515 WT |
1429 | return -EFAULT; |
1430 | ||
70a8c3eb | 1431 | lcd_write_char(c); |
698b1515 | 1432 | } |
7005b584 | 1433 | |
698b1515 | 1434 | return tmp - buf; |
7005b584 WT |
1435 | } |
1436 | ||
698b1515 WT |
1437 | static int lcd_open(struct inode *inode, struct file *file) |
1438 | { | |
f4757af8 | 1439 | if (!atomic_dec_and_test(&lcd_available)) |
698b1515 | 1440 | return -EBUSY; /* open only once at a time */ |
7005b584 | 1441 | |
698b1515 WT |
1442 | if (file->f_mode & FMODE_READ) /* device is write-only */ |
1443 | return -EPERM; | |
7005b584 | 1444 | |
6d8b588c | 1445 | if (lcd.must_clear) { |
698b1515 | 1446 | lcd_clear_display(); |
6d8b588c | 1447 | lcd.must_clear = false; |
698b1515 | 1448 | } |
3ff81013 | 1449 | return nonseekable_open(inode, file); |
7005b584 WT |
1450 | } |
1451 | ||
698b1515 WT |
1452 | static int lcd_release(struct inode *inode, struct file *file) |
1453 | { | |
f4757af8 | 1454 | atomic_inc(&lcd_available); |
698b1515 | 1455 | return 0; |
7005b584 WT |
1456 | } |
1457 | ||
429ccf05 | 1458 | static const struct file_operations lcd_fops = { |
698b1515 WT |
1459 | .write = lcd_write, |
1460 | .open = lcd_open, | |
1461 | .release = lcd_release, | |
3ff81013 | 1462 | .llseek = no_llseek, |
7005b584 WT |
1463 | }; |
1464 | ||
1465 | static struct miscdevice lcd_dev = { | |
6c3773de MG |
1466 | .minor = LCD_MINOR, |
1467 | .name = "lcd", | |
1468 | .fops = &lcd_fops, | |
7005b584 WT |
1469 | }; |
1470 | ||
7005b584 | 1471 | /* public function usable from the kernel for any purpose */ |
36d2041a | 1472 | static void panel_lcd_print(const char *s) |
698b1515 | 1473 | { |
70a8c3eb BA |
1474 | const char *tmp = s; |
1475 | int count = strlen(s); | |
1476 | ||
6d8b588c | 1477 | if (lcd.enabled && lcd.initialized) { |
70a8c3eb BA |
1478 | for (; count-- > 0; tmp++) { |
1479 | if (!in_interrupt() && (((count + 1) & 0x1f) == 0)) | |
8c17893c NB |
1480 | /* |
1481 | * let's be a little nice with other processes | |
1482 | * that need some CPU | |
1483 | */ | |
70a8c3eb BA |
1484 | schedule(); |
1485 | ||
1486 | lcd_write_char(*tmp); | |
1487 | } | |
1488 | } | |
7005b584 WT |
1489 | } |
1490 | ||
7005b584 | 1491 | /* initialize the LCD driver */ |
36d2041a | 1492 | static void lcd_init(void) |
698b1515 | 1493 | { |
87b8e0c8 | 1494 | switch (selected_lcd_type) { |
429ccf05 HH |
1495 | case LCD_TYPE_OLD: |
1496 | /* parallel mode, 8 bits */ | |
8037e2a3 MG |
1497 | lcd.proto = LCD_PROTO_PARALLEL; |
1498 | lcd.charset = LCD_CHARSET_NORMAL; | |
1499 | lcd.pins.e = PIN_STROBE; | |
1500 | lcd.pins.rs = PIN_AUTOLF; | |
1501 | ||
1502 | lcd.width = 40; | |
1503 | lcd.bwidth = 40; | |
1504 | lcd.hwidth = 64; | |
1505 | lcd.height = 2; | |
7005b584 | 1506 | break; |
429ccf05 HH |
1507 | case LCD_TYPE_KS0074: |
1508 | /* serial mode, ks0074 */ | |
8037e2a3 MG |
1509 | lcd.proto = LCD_PROTO_SERIAL; |
1510 | lcd.charset = LCD_CHARSET_KS0074; | |
1511 | lcd.pins.bl = PIN_AUTOLF; | |
1512 | lcd.pins.cl = PIN_STROBE; | |
1513 | lcd.pins.da = PIN_D0; | |
1514 | ||
1515 | lcd.width = 16; | |
1516 | lcd.bwidth = 40; | |
1517 | lcd.hwidth = 16; | |
1518 | lcd.height = 2; | |
7005b584 | 1519 | break; |
429ccf05 HH |
1520 | case LCD_TYPE_NEXCOM: |
1521 | /* parallel mode, 8 bits, generic */ | |
8037e2a3 MG |
1522 | lcd.proto = LCD_PROTO_PARALLEL; |
1523 | lcd.charset = LCD_CHARSET_NORMAL; | |
1524 | lcd.pins.e = PIN_AUTOLF; | |
1525 | lcd.pins.rs = PIN_SELECP; | |
1526 | lcd.pins.rw = PIN_INITP; | |
1527 | ||
1528 | lcd.width = 16; | |
1529 | lcd.bwidth = 40; | |
1530 | lcd.hwidth = 64; | |
1531 | lcd.height = 2; | |
7005b584 | 1532 | break; |
429ccf05 HH |
1533 | case LCD_TYPE_CUSTOM: |
1534 | /* customer-defined */ | |
8037e2a3 MG |
1535 | lcd.proto = DEFAULT_LCD_PROTO; |
1536 | lcd.charset = DEFAULT_LCD_CHARSET; | |
7005b584 WT |
1537 | /* default geometry will be set later */ |
1538 | break; | |
429ccf05 HH |
1539 | case LCD_TYPE_HANTRONIX: |
1540 | /* parallel mode, 8 bits, hantronix-like */ | |
698b1515 | 1541 | default: |
8037e2a3 MG |
1542 | lcd.proto = LCD_PROTO_PARALLEL; |
1543 | lcd.charset = LCD_CHARSET_NORMAL; | |
1544 | lcd.pins.e = PIN_STROBE; | |
1545 | lcd.pins.rs = PIN_SELECP; | |
1546 | ||
1547 | lcd.width = 16; | |
1548 | lcd.bwidth = 40; | |
1549 | lcd.hwidth = 64; | |
1550 | lcd.height = 2; | |
7005b584 | 1551 | break; |
698b1515 | 1552 | } |
7005b584 | 1553 | |
8037e2a3 | 1554 | /* Overwrite with module params set on loading */ |
1a4b2e3e | 1555 | if (lcd_height != NOT_SET) |
8037e2a3 | 1556 | lcd.height = lcd_height; |
1a4b2e3e | 1557 | if (lcd_width != NOT_SET) |
8037e2a3 | 1558 | lcd.width = lcd_width; |
1a4b2e3e | 1559 | if (lcd_bwidth != NOT_SET) |
8037e2a3 | 1560 | lcd.bwidth = lcd_bwidth; |
1a4b2e3e | 1561 | if (lcd_hwidth != NOT_SET) |
8037e2a3 | 1562 | lcd.hwidth = lcd_hwidth; |
1a4b2e3e | 1563 | if (lcd_charset != NOT_SET) |
8037e2a3 | 1564 | lcd.charset = lcd_charset; |
1a4b2e3e | 1565 | if (lcd_proto != NOT_SET) |
8037e2a3 MG |
1566 | lcd.proto = lcd_proto; |
1567 | if (lcd_e_pin != PIN_NOT_SET) | |
1568 | lcd.pins.e = lcd_e_pin; | |
1569 | if (lcd_rs_pin != PIN_NOT_SET) | |
1570 | lcd.pins.rs = lcd_rs_pin; | |
1571 | if (lcd_rw_pin != PIN_NOT_SET) | |
1572 | lcd.pins.rw = lcd_rw_pin; | |
1573 | if (lcd_cl_pin != PIN_NOT_SET) | |
1574 | lcd.pins.cl = lcd_cl_pin; | |
1575 | if (lcd_da_pin != PIN_NOT_SET) | |
1576 | lcd.pins.da = lcd_da_pin; | |
1577 | if (lcd_bl_pin != PIN_NOT_SET) | |
1578 | lcd.pins.bl = lcd_bl_pin; | |
1579 | ||
698b1515 | 1580 | /* this is used to catch wrong and default values */ |
8037e2a3 MG |
1581 | if (lcd.width <= 0) |
1582 | lcd.width = DEFAULT_LCD_WIDTH; | |
1583 | if (lcd.bwidth <= 0) | |
1584 | lcd.bwidth = DEFAULT_LCD_BWIDTH; | |
1585 | if (lcd.hwidth <= 0) | |
1586 | lcd.hwidth = DEFAULT_LCD_HWIDTH; | |
1587 | if (lcd.height <= 0) | |
1588 | lcd.height = DEFAULT_LCD_HEIGHT; | |
1589 | ||
1590 | if (lcd.proto == LCD_PROTO_SERIAL) { /* SERIAL */ | |
698b1515 WT |
1591 | lcd_write_cmd = lcd_write_cmd_s; |
1592 | lcd_write_data = lcd_write_data_s; | |
1593 | lcd_clear_fast = lcd_clear_fast_s; | |
1594 | ||
8037e2a3 MG |
1595 | if (lcd.pins.cl == PIN_NOT_SET) |
1596 | lcd.pins.cl = DEFAULT_LCD_PIN_SCL; | |
1597 | if (lcd.pins.da == PIN_NOT_SET) | |
1598 | lcd.pins.da = DEFAULT_LCD_PIN_SDA; | |
698b1515 | 1599 | |
8037e2a3 | 1600 | } else if (lcd.proto == LCD_PROTO_PARALLEL) { /* PARALLEL */ |
698b1515 WT |
1601 | lcd_write_cmd = lcd_write_cmd_p8; |
1602 | lcd_write_data = lcd_write_data_p8; | |
1603 | lcd_clear_fast = lcd_clear_fast_p8; | |
1604 | ||
8037e2a3 MG |
1605 | if (lcd.pins.e == PIN_NOT_SET) |
1606 | lcd.pins.e = DEFAULT_LCD_PIN_E; | |
1607 | if (lcd.pins.rs == PIN_NOT_SET) | |
1608 | lcd.pins.rs = DEFAULT_LCD_PIN_RS; | |
1609 | if (lcd.pins.rw == PIN_NOT_SET) | |
1610 | lcd.pins.rw = DEFAULT_LCD_PIN_RW; | |
77943d31 SR |
1611 | } else { |
1612 | lcd_write_cmd = lcd_write_cmd_tilcd; | |
1613 | lcd_write_data = lcd_write_data_tilcd; | |
1614 | lcd_clear_fast = lcd_clear_fast_tilcd; | |
698b1515 | 1615 | } |
7005b584 | 1616 | |
8037e2a3 MG |
1617 | if (lcd.pins.bl == PIN_NOT_SET) |
1618 | lcd.pins.bl = DEFAULT_LCD_PIN_BL; | |
1619 | ||
1620 | if (lcd.pins.e == PIN_NOT_SET) | |
1621 | lcd.pins.e = PIN_NONE; | |
1622 | if (lcd.pins.rs == PIN_NOT_SET) | |
1623 | lcd.pins.rs = PIN_NONE; | |
1624 | if (lcd.pins.rw == PIN_NOT_SET) | |
1625 | lcd.pins.rw = PIN_NONE; | |
1626 | if (lcd.pins.bl == PIN_NOT_SET) | |
1627 | lcd.pins.bl = PIN_NONE; | |
1628 | if (lcd.pins.cl == PIN_NOT_SET) | |
1629 | lcd.pins.cl = PIN_NONE; | |
1630 | if (lcd.pins.da == PIN_NOT_SET) | |
1631 | lcd.pins.da = PIN_NONE; | |
1632 | ||
1633 | if (lcd.charset == NOT_SET) | |
1634 | lcd.charset = DEFAULT_LCD_CHARSET; | |
1635 | ||
1636 | if (lcd.charset == LCD_CHARSET_KS0074) | |
698b1515 WT |
1637 | lcd_char_conv = lcd_char_conv_ks0074; |
1638 | else | |
1639 | lcd_char_conv = NULL; | |
1640 | ||
8037e2a3 | 1641 | if (lcd.pins.bl != PIN_NONE) |
698b1515 WT |
1642 | init_scan_timer(); |
1643 | ||
8037e2a3 | 1644 | pin_to_bits(lcd.pins.e, lcd_bits[LCD_PORT_D][LCD_BIT_E], |
698b1515 | 1645 | lcd_bits[LCD_PORT_C][LCD_BIT_E]); |
8037e2a3 | 1646 | pin_to_bits(lcd.pins.rs, lcd_bits[LCD_PORT_D][LCD_BIT_RS], |
698b1515 | 1647 | lcd_bits[LCD_PORT_C][LCD_BIT_RS]); |
8037e2a3 | 1648 | pin_to_bits(lcd.pins.rw, lcd_bits[LCD_PORT_D][LCD_BIT_RW], |
698b1515 | 1649 | lcd_bits[LCD_PORT_C][LCD_BIT_RW]); |
8037e2a3 | 1650 | pin_to_bits(lcd.pins.bl, lcd_bits[LCD_PORT_D][LCD_BIT_BL], |
698b1515 | 1651 | lcd_bits[LCD_PORT_C][LCD_BIT_BL]); |
8037e2a3 | 1652 | pin_to_bits(lcd.pins.cl, lcd_bits[LCD_PORT_D][LCD_BIT_CL], |
698b1515 | 1653 | lcd_bits[LCD_PORT_C][LCD_BIT_CL]); |
8037e2a3 | 1654 | pin_to_bits(lcd.pins.da, lcd_bits[LCD_PORT_D][LCD_BIT_DA], |
698b1515 WT |
1655 | lcd_bits[LCD_PORT_C][LCD_BIT_DA]); |
1656 | ||
8c17893c NB |
1657 | /* |
1658 | * before this line, we must NOT send anything to the display. | |
698b1515 | 1659 | * Since lcd_init_display() needs to write data, we have to |
8c17893c NB |
1660 | * enable mark the LCD initialized just before. |
1661 | */ | |
6d8b588c | 1662 | lcd.initialized = true; |
698b1515 | 1663 | lcd_init_display(); |
7005b584 | 1664 | |
698b1515 | 1665 | /* display a short message */ |
7005b584 WT |
1666 | #ifdef CONFIG_PANEL_CHANGE_MESSAGE |
1667 | #ifdef CONFIG_PANEL_BOOT_MESSAGE | |
698b1515 | 1668 | panel_lcd_print("\x1b[Lc\x1b[Lb\x1b[L*" CONFIG_PANEL_BOOT_MESSAGE); |
7005b584 WT |
1669 | #endif |
1670 | #else | |
698b1515 WT |
1671 | panel_lcd_print("\x1b[Lc\x1b[Lb\x1b[L*Linux-" UTS_RELEASE "\nPanel-" |
1672 | PANEL_VERSION); | |
7005b584 | 1673 | #endif |
6d8b588c MG |
1674 | lcd.addr.x = 0; |
1675 | lcd.addr.y = 0; | |
429ccf05 | 1676 | /* clear the display on the next device opening */ |
6d8b588c | 1677 | lcd.must_clear = true; |
698b1515 | 1678 | lcd_gotoxy(); |
7005b584 WT |
1679 | } |
1680 | ||
7005b584 WT |
1681 | /* |
1682 | * These are the file operation function for user access to /dev/keypad | |
1683 | */ | |
1684 | ||
698b1515 | 1685 | static ssize_t keypad_read(struct file *file, |
cce75f41 | 1686 | char __user *buf, size_t count, loff_t *ppos) |
698b1515 | 1687 | { |
698b1515 | 1688 | unsigned i = *ppos; |
cce75f41 | 1689 | char __user *tmp = buf; |
7005b584 | 1690 | |
698b1515 WT |
1691 | if (keypad_buflen == 0) { |
1692 | if (file->f_flags & O_NONBLOCK) | |
1693 | return -EAGAIN; | |
7005b584 | 1694 | |
310df69c AB |
1695 | if (wait_event_interruptible(keypad_read_wait, |
1696 | keypad_buflen != 0)) | |
698b1515 WT |
1697 | return -EINTR; |
1698 | } | |
7005b584 | 1699 | |
429ccf05 HH |
1700 | for (; count-- > 0 && (keypad_buflen > 0); |
1701 | ++i, ++tmp, --keypad_buflen) { | |
698b1515 WT |
1702 | put_user(keypad_buffer[keypad_start], tmp); |
1703 | keypad_start = (keypad_start + 1) % KEYPAD_BUFFER; | |
1704 | } | |
1705 | *ppos = i; | |
7005b584 | 1706 | |
698b1515 | 1707 | return tmp - buf; |
7005b584 WT |
1708 | } |
1709 | ||
698b1515 WT |
1710 | static int keypad_open(struct inode *inode, struct file *file) |
1711 | { | |
f4757af8 | 1712 | if (!atomic_dec_and_test(&keypad_available)) |
698b1515 | 1713 | return -EBUSY; /* open only once at a time */ |
7005b584 | 1714 | |
698b1515 WT |
1715 | if (file->f_mode & FMODE_WRITE) /* device is read-only */ |
1716 | return -EPERM; | |
7005b584 | 1717 | |
698b1515 | 1718 | keypad_buflen = 0; /* flush the buffer on opening */ |
698b1515 | 1719 | return 0; |
7005b584 WT |
1720 | } |
1721 | ||
698b1515 WT |
1722 | static int keypad_release(struct inode *inode, struct file *file) |
1723 | { | |
f4757af8 | 1724 | atomic_inc(&keypad_available); |
698b1515 | 1725 | return 0; |
7005b584 WT |
1726 | } |
1727 | ||
429ccf05 | 1728 | static const struct file_operations keypad_fops = { |
698b1515 WT |
1729 | .read = keypad_read, /* read */ |
1730 | .open = keypad_open, /* open */ | |
1731 | .release = keypad_release, /* close */ | |
6038f373 | 1732 | .llseek = default_llseek, |
7005b584 WT |
1733 | }; |
1734 | ||
1735 | static struct miscdevice keypad_dev = { | |
6c3773de MG |
1736 | .minor = KEYPAD_MINOR, |
1737 | .name = "keypad", | |
1738 | .fops = &keypad_fops, | |
7005b584 WT |
1739 | }; |
1740 | ||
36d2041a | 1741 | static void keypad_send_key(const char *string, int max_len) |
698b1515 | 1742 | { |
698b1515 | 1743 | /* send the key to the device only if a process is attached to it. */ |
f4757af8 | 1744 | if (!atomic_read(&keypad_available)) { |
698b1515 WT |
1745 | while (max_len-- && keypad_buflen < KEYPAD_BUFFER && *string) { |
1746 | keypad_buffer[(keypad_start + keypad_buflen++) % | |
1747 | KEYPAD_BUFFER] = *string++; | |
1748 | } | |
1749 | wake_up_interruptible(&keypad_read_wait); | |
7005b584 | 1750 | } |
7005b584 WT |
1751 | } |
1752 | ||
429ccf05 HH |
1753 | /* this function scans all the bits involving at least one logical signal, |
1754 | * and puts the results in the bitfield "phys_read" (one bit per established | |
1755 | * contact), and sets "phys_read_prev" to "phys_read". | |
7005b584 | 1756 | * |
429ccf05 HH |
1757 | * Note: to debounce input signals, we will only consider as switched a signal |
1758 | * which is stable across 2 measures. Signals which are different between two | |
1759 | * reads will be kept as they previously were in their logical form (phys_prev). | |
1760 | * A signal which has just switched will have a 1 in | |
1761 | * (phys_read ^ phys_read_prev). | |
7005b584 | 1762 | */ |
698b1515 WT |
1763 | static void phys_scan_contacts(void) |
1764 | { | |
1765 | int bit, bitval; | |
1766 | char oldval; | |
1767 | char bitmask; | |
1768 | char gndmask; | |
1769 | ||
1770 | phys_prev = phys_curr; | |
1771 | phys_read_prev = phys_read; | |
1772 | phys_read = 0; /* flush all signals */ | |
1773 | ||
429ccf05 HH |
1774 | /* keep track of old value, with all outputs disabled */ |
1775 | oldval = r_dtr(pprt) | scan_mask_o; | |
1776 | /* activate all keyboard outputs (active low) */ | |
1777 | w_dtr(pprt, oldval & ~scan_mask_o); | |
1778 | ||
1779 | /* will have a 1 for each bit set to gnd */ | |
1780 | bitmask = PNL_PINPUT(r_str(pprt)) & scan_mask_i; | |
1781 | /* disable all matrix signals */ | |
1782 | w_dtr(pprt, oldval); | |
698b1515 WT |
1783 | |
1784 | /* now that all outputs are cleared, the only active input bits are | |
1785 | * directly connected to the ground | |
7005b584 | 1786 | */ |
698b1515 | 1787 | |
429ccf05 HH |
1788 | /* 1 for each grounded input */ |
1789 | gndmask = PNL_PINPUT(r_str(pprt)) & scan_mask_i; | |
1790 | ||
1791 | /* grounded inputs are signals 40-44 */ | |
76e9521f | 1792 | phys_read |= (pmask_t)gndmask << 40; |
7005b584 | 1793 | |
698b1515 | 1794 | if (bitmask != gndmask) { |
8c17893c NB |
1795 | /* |
1796 | * since clearing the outputs changed some inputs, we know | |
429ccf05 HH |
1797 | * that some input signals are currently tied to some outputs. |
1798 | * So we'll scan them. | |
698b1515 WT |
1799 | */ |
1800 | for (bit = 0; bit < 8; bit++) { | |
79f2af62 | 1801 | bitval = BIT(bit); |
7005b584 | 1802 | |
698b1515 WT |
1803 | if (!(scan_mask_o & bitval)) /* skip unused bits */ |
1804 | continue; | |
1805 | ||
1806 | w_dtr(pprt, oldval & ~bitval); /* enable this output */ | |
1807 | bitmask = PNL_PINPUT(r_str(pprt)) & ~gndmask; | |
7a725972 | 1808 | phys_read |= (pmask_t)bitmask << (5 * bit); |
698b1515 WT |
1809 | } |
1810 | w_dtr(pprt, oldval); /* disable all outputs */ | |
7005b584 | 1811 | } |
8c17893c NB |
1812 | /* |
1813 | * this is easy: use old bits when they are flapping, | |
1814 | * use new ones when stable | |
1815 | */ | |
429ccf05 HH |
1816 | phys_curr = (phys_prev & (phys_read ^ phys_read_prev)) | |
1817 | (phys_read & ~(phys_read ^ phys_read_prev)); | |
1818 | } | |
1819 | ||
1820 | static inline int input_state_high(struct logical_input *input) | |
1821 | { | |
1822 | #if 0 | |
1823 | /* FIXME: | |
1824 | * this is an invalid test. It tries to catch | |
1825 | * transitions from single-key to multiple-key, but | |
1826 | * doesn't take into account the contacts polarity. | |
1827 | * The only solution to the problem is to parse keys | |
1828 | * from the most complex to the simplest combinations, | |
1829 | * and mark them as 'caught' once a combination | |
1830 | * matches, then unmatch it for all other ones. | |
1831 | */ | |
1832 | ||
1833 | /* try to catch dangerous transitions cases : | |
1834 | * someone adds a bit, so this signal was a false | |
1835 | * positive resulting from a transition. We should | |
1836 | * invalidate the signal immediately and not call the | |
1837 | * release function. | |
1838 | * eg: 0 -(press A)-> A -(press B)-> AB : don't match A's release. | |
1839 | */ | |
fdf4a494 DB |
1840 | if (((phys_prev & input->mask) == input->value) && |
1841 | ((phys_curr & input->mask) > input->value)) { | |
429ccf05 HH |
1842 | input->state = INPUT_ST_LOW; /* invalidate */ |
1843 | return 1; | |
1844 | } | |
1845 | #endif | |
1846 | ||
1847 | if ((phys_curr & input->mask) == input->value) { | |
1848 | if ((input->type == INPUT_TYPE_STD) && | |
1849 | (input->high_timer == 0)) { | |
1850 | input->high_timer++; | |
b565b3fb | 1851 | if (input->u.std.press_fct) |
429ccf05 HH |
1852 | input->u.std.press_fct(input->u.std.press_data); |
1853 | } else if (input->type == INPUT_TYPE_KBD) { | |
1854 | /* will turn on the light */ | |
1855 | keypressed = 1; | |
1856 | ||
1857 | if (input->high_timer == 0) { | |
1858 | char *press_str = input->u.kbd.press_str; | |
c3ed0afc | 1859 | |
e6626de5 JC |
1860 | if (press_str[0]) { |
1861 | int s = sizeof(input->u.kbd.press_str); | |
c3ed0afc | 1862 | |
e6626de5 JC |
1863 | keypad_send_key(press_str, s); |
1864 | } | |
429ccf05 HH |
1865 | } |
1866 | ||
1867 | if (input->u.kbd.repeat_str[0]) { | |
1868 | char *repeat_str = input->u.kbd.repeat_str; | |
c3ed0afc | 1869 | |
429ccf05 | 1870 | if (input->high_timer >= KEYPAD_REP_START) { |
e6626de5 | 1871 | int s = sizeof(input->u.kbd.repeat_str); |
c3ed0afc | 1872 | |
429ccf05 | 1873 | input->high_timer -= KEYPAD_REP_DELAY; |
e6626de5 | 1874 | keypad_send_key(repeat_str, s); |
429ccf05 HH |
1875 | } |
1876 | /* we will need to come back here soon */ | |
1877 | inputs_stable = 0; | |
1878 | } | |
1879 | ||
1880 | if (input->high_timer < 255) | |
1881 | input->high_timer++; | |
1882 | } | |
1883 | return 1; | |
429ccf05 | 1884 | } |
083b3638 VH |
1885 | |
1886 | /* else signal falling down. Let's fall through. */ | |
1887 | input->state = INPUT_ST_FALLING; | |
1888 | input->fall_timer = 0; | |
1889 | ||
429ccf05 HH |
1890 | return 0; |
1891 | } | |
1892 | ||
1893 | static inline void input_state_falling(struct logical_input *input) | |
1894 | { | |
1895 | #if 0 | |
1896 | /* FIXME !!! same comment as in input_state_high */ | |
fdf4a494 DB |
1897 | if (((phys_prev & input->mask) == input->value) && |
1898 | ((phys_curr & input->mask) > input->value)) { | |
429ccf05 HH |
1899 | input->state = INPUT_ST_LOW; /* invalidate */ |
1900 | return; | |
1901 | } | |
1902 | #endif | |
1903 | ||
1904 | if ((phys_curr & input->mask) == input->value) { | |
1905 | if (input->type == INPUT_TYPE_KBD) { | |
1906 | /* will turn on the light */ | |
1907 | keypressed = 1; | |
1908 | ||
1909 | if (input->u.kbd.repeat_str[0]) { | |
1910 | char *repeat_str = input->u.kbd.repeat_str; | |
c3ed0afc | 1911 | |
e6626de5 JC |
1912 | if (input->high_timer >= KEYPAD_REP_START) { |
1913 | int s = sizeof(input->u.kbd.repeat_str); | |
c3ed0afc | 1914 | |
429ccf05 | 1915 | input->high_timer -= KEYPAD_REP_DELAY; |
e6626de5 JC |
1916 | keypad_send_key(repeat_str, s); |
1917 | } | |
429ccf05 HH |
1918 | /* we will need to come back here soon */ |
1919 | inputs_stable = 0; | |
1920 | } | |
1921 | ||
1922 | if (input->high_timer < 255) | |
1923 | input->high_timer++; | |
1924 | } | |
1925 | input->state = INPUT_ST_HIGH; | |
1926 | } else if (input->fall_timer >= input->fall_time) { | |
1927 | /* call release event */ | |
1928 | if (input->type == INPUT_TYPE_STD) { | |
1929 | void (*release_fct)(int) = input->u.std.release_fct; | |
c3ed0afc | 1930 | |
b565b3fb | 1931 | if (release_fct) |
429ccf05 HH |
1932 | release_fct(input->u.std.release_data); |
1933 | } else if (input->type == INPUT_TYPE_KBD) { | |
1934 | char *release_str = input->u.kbd.release_str; | |
c3ed0afc | 1935 | |
e6626de5 JC |
1936 | if (release_str[0]) { |
1937 | int s = sizeof(input->u.kbd.release_str); | |
c3ed0afc | 1938 | |
e6626de5 JC |
1939 | keypad_send_key(release_str, s); |
1940 | } | |
429ccf05 HH |
1941 | } |
1942 | ||
1943 | input->state = INPUT_ST_LOW; | |
1944 | } else { | |
1945 | input->fall_timer++; | |
1946 | inputs_stable = 0; | |
1947 | } | |
7005b584 WT |
1948 | } |
1949 | ||
698b1515 WT |
1950 | static void panel_process_inputs(void) |
1951 | { | |
1952 | struct list_head *item; | |
1953 | struct logical_input *input; | |
7005b584 | 1954 | |
698b1515 WT |
1955 | keypressed = 0; |
1956 | inputs_stable = 1; | |
1957 | list_for_each(item, &logical_inputs) { | |
1958 | input = list_entry(item, struct logical_input, list); | |
1959 | ||
1960 | switch (input->state) { | |
1961 | case INPUT_ST_LOW: | |
1962 | if ((phys_curr & input->mask) != input->value) | |
1963 | break; | |
429ccf05 HH |
1964 | /* if all needed ones were already set previously, |
1965 | * this means that this logical signal has been | |
1966 | * activated by the releasing of another combined | |
1967 | * signal, so we don't want to match. | |
1968 | * eg: AB -(release B)-> A -(release A)-> 0 : | |
1969 | * don't match A. | |
698b1515 WT |
1970 | */ |
1971 | if ((phys_prev & input->mask) == input->value) | |
1972 | break; | |
1973 | input->rise_timer = 0; | |
1974 | input->state = INPUT_ST_RISING; | |
1975 | /* no break here, fall through */ | |
1976 | case INPUT_ST_RISING: | |
1977 | if ((phys_curr & input->mask) != input->value) { | |
1978 | input->state = INPUT_ST_LOW; | |
1979 | break; | |
1980 | } | |
1981 | if (input->rise_timer < input->rise_time) { | |
1982 | inputs_stable = 0; | |
1983 | input->rise_timer++; | |
1984 | break; | |
1985 | } | |
1986 | input->high_timer = 0; | |
1987 | input->state = INPUT_ST_HIGH; | |
1988 | /* no break here, fall through */ | |
1989 | case INPUT_ST_HIGH: | |
429ccf05 | 1990 | if (input_state_high(input)) |
698b1515 | 1991 | break; |
698b1515 WT |
1992 | /* no break here, fall through */ |
1993 | case INPUT_ST_FALLING: | |
429ccf05 | 1994 | input_state_falling(input); |
698b1515 WT |
1995 | } |
1996 | } | |
1997 | } | |
7005b584 | 1998 | |
698b1515 WT |
1999 | static void panel_scan_timer(void) |
2000 | { | |
a8b2580b | 2001 | if (keypad.enabled && keypad_initialized) { |
d4d2dbca | 2002 | if (spin_trylock_irq(&pprt_lock)) { |
698b1515 | 2003 | phys_scan_contacts(); |
429ccf05 HH |
2004 | |
2005 | /* no need for the parport anymore */ | |
d4d2dbca | 2006 | spin_unlock_irq(&pprt_lock); |
7005b584 WT |
2007 | } |
2008 | ||
698b1515 WT |
2009 | if (!inputs_stable || phys_curr != phys_prev) |
2010 | panel_process_inputs(); | |
7005b584 | 2011 | } |
7005b584 | 2012 | |
6d8b588c | 2013 | if (lcd.enabled && lcd.initialized) { |
698b1515 | 2014 | if (keypressed) { |
832bf28c SS |
2015 | if (lcd.light_tempo == 0 && |
2016 | ((lcd.flags & LCD_FLAG_L) == 0)) | |
698b1515 | 2017 | lcd_backlight(1); |
6d8b588c MG |
2018 | lcd.light_tempo = FLASH_LIGHT_TEMPO; |
2019 | } else if (lcd.light_tempo > 0) { | |
2020 | lcd.light_tempo--; | |
832bf28c SS |
2021 | if (lcd.light_tempo == 0 && |
2022 | ((lcd.flags & LCD_FLAG_L) == 0)) | |
698b1515 WT |
2023 | lcd_backlight(0); |
2024 | } | |
2025 | } | |
2026 | ||
2027 | mod_timer(&scan_timer, jiffies + INPUT_POLL_TIME); | |
7005b584 WT |
2028 | } |
2029 | ||
698b1515 WT |
2030 | static void init_scan_timer(void) |
2031 | { | |
b565b3fb | 2032 | if (scan_timer.function) |
698b1515 WT |
2033 | return; /* already started */ |
2034 | ||
8f6e36c5 | 2035 | setup_timer(&scan_timer, (void *)&panel_scan_timer, 0); |
698b1515 | 2036 | scan_timer.expires = jiffies + INPUT_POLL_TIME; |
698b1515 | 2037 | add_timer(&scan_timer); |
7005b584 WT |
2038 | } |
2039 | ||
2040 | /* converts a name of the form "({BbAaPpSsEe}{01234567-})*" to a series of bits. | |
429ccf05 HH |
2041 | * if <omask> or <imask> are non-null, they will be or'ed with the bits |
2042 | * corresponding to out and in bits respectively. | |
7005b584 WT |
2043 | * returns 1 if ok, 0 if error (in which case, nothing is written). |
2044 | */ | |
36d2041a | 2045 | static int input_name2mask(const char *name, pmask_t *mask, pmask_t *value, |
698b1515 WT |
2046 | char *imask, char *omask) |
2047 | { | |
2048 | static char sigtab[10] = "EeSsPpAaBb"; | |
2049 | char im, om; | |
2050 | pmask_t m, v; | |
2051 | ||
2d53426b DB |
2052 | om = 0ULL; |
2053 | im = 0ULL; | |
2054 | m = 0ULL; | |
2055 | v = 0ULL; | |
698b1515 WT |
2056 | while (*name) { |
2057 | int in, out, bit, neg; | |
c3ed0afc | 2058 | |
fdf4a494 DB |
2059 | for (in = 0; (in < sizeof(sigtab)) && (sigtab[in] != *name); |
2060 | in++) | |
698b1515 | 2061 | ; |
fdf4a494 | 2062 | |
698b1515 WT |
2063 | if (in >= sizeof(sigtab)) |
2064 | return 0; /* input name not found */ | |
2065 | neg = (in & 1); /* odd (lower) names are negated */ | |
2066 | in >>= 1; | |
79f2af62 | 2067 | im |= BIT(in); |
698b1515 WT |
2068 | |
2069 | name++; | |
2070 | if (isdigit(*name)) { | |
2071 | out = *name - '0'; | |
79f2af62 | 2072 | om |= BIT(out); |
3ac76904 | 2073 | } else if (*name == '-') { |
698b1515 | 2074 | out = 8; |
3ac76904 | 2075 | } else { |
698b1515 | 2076 | return 0; /* unknown bit name */ |
3ac76904 | 2077 | } |
698b1515 WT |
2078 | |
2079 | bit = (out * 5) + in; | |
2080 | ||
2081 | m |= 1ULL << bit; | |
2082 | if (!neg) | |
2083 | v |= 1ULL << bit; | |
2084 | name++; | |
7005b584 | 2085 | } |
698b1515 WT |
2086 | *mask = m; |
2087 | *value = v; | |
2088 | if (imask) | |
2089 | *imask |= im; | |
2090 | if (omask) | |
2091 | *omask |= om; | |
2092 | return 1; | |
7005b584 WT |
2093 | } |
2094 | ||
2095 | /* tries to bind a key to the signal name <name>. The key will send the | |
2096 | * strings <press>, <repeat>, <release> for these respective events. | |
2097 | * Returns the pointer to the new key if ok, NULL if the key could not be bound. | |
2098 | */ | |
36d2041a PH |
2099 | static struct logical_input *panel_bind_key(const char *name, const char *press, |
2100 | const char *repeat, | |
2101 | const char *release) | |
698b1515 WT |
2102 | { |
2103 | struct logical_input *key; | |
2104 | ||
fdf4a494 | 2105 | key = kzalloc(sizeof(*key), GFP_KERNEL); |
eb073a9b | 2106 | if (!key) |
698b1515 | 2107 | return NULL; |
eb073a9b | 2108 | |
698b1515 | 2109 | if (!input_name2mask(name, &key->mask, &key->value, &scan_mask_i, |
cb46f472 KV |
2110 | &scan_mask_o)) { |
2111 | kfree(key); | |
698b1515 | 2112 | return NULL; |
cb46f472 | 2113 | } |
698b1515 WT |
2114 | |
2115 | key->type = INPUT_TYPE_KBD; | |
2116 | key->state = INPUT_ST_LOW; | |
2117 | key->rise_time = 1; | |
2118 | key->fall_time = 1; | |
7005b584 | 2119 | |
698b1515 WT |
2120 | strncpy(key->u.kbd.press_str, press, sizeof(key->u.kbd.press_str)); |
2121 | strncpy(key->u.kbd.repeat_str, repeat, sizeof(key->u.kbd.repeat_str)); | |
2122 | strncpy(key->u.kbd.release_str, release, | |
2123 | sizeof(key->u.kbd.release_str)); | |
2124 | list_add(&key->list, &logical_inputs); | |
2125 | return key; | |
7005b584 WT |
2126 | } |
2127 | ||
63023177 | 2128 | #if 0 |
7005b584 WT |
2129 | /* tries to bind a callback function to the signal name <name>. The function |
2130 | * <press_fct> will be called with the <press_data> arg when the signal is | |
2131 | * activated, and so on for <release_fct>/<release_data> | |
429ccf05 HH |
2132 | * Returns the pointer to the new signal if ok, NULL if the signal could not |
2133 | * be bound. | |
7005b584 WT |
2134 | */ |
2135 | static struct logical_input *panel_bind_callback(char *name, | |
68d386bf | 2136 | void (*press_fct)(int), |
698b1515 | 2137 | int press_data, |
68d386bf | 2138 | void (*release_fct)(int), |
698b1515 WT |
2139 | int release_data) |
2140 | { | |
2141 | struct logical_input *callback; | |
2142 | ||
fdf4a494 | 2143 | callback = kmalloc(sizeof(*callback), GFP_KERNEL); |
eb073a9b | 2144 | if (!callback) |
698b1515 | 2145 | return NULL; |
eb073a9b | 2146 | |
698b1515 WT |
2147 | memset(callback, 0, sizeof(struct logical_input)); |
2148 | if (!input_name2mask(name, &callback->mask, &callback->value, | |
2149 | &scan_mask_i, &scan_mask_o)) | |
2150 | return NULL; | |
2151 | ||
2152 | callback->type = INPUT_TYPE_STD; | |
2153 | callback->state = INPUT_ST_LOW; | |
2154 | callback->rise_time = 1; | |
2155 | callback->fall_time = 1; | |
2156 | callback->u.std.press_fct = press_fct; | |
2157 | callback->u.std.press_data = press_data; | |
2158 | callback->u.std.release_fct = release_fct; | |
2159 | callback->u.std.release_data = release_data; | |
2160 | list_add(&callback->list, &logical_inputs); | |
2161 | return callback; | |
7005b584 | 2162 | } |
63023177 | 2163 | #endif |
7005b584 | 2164 | |
698b1515 WT |
2165 | static void keypad_init(void) |
2166 | { | |
2167 | int keynum; | |
c3ed0afc | 2168 | |
698b1515 WT |
2169 | init_waitqueue_head(&keypad_read_wait); |
2170 | keypad_buflen = 0; /* flushes any eventual noisy keystroke */ | |
7005b584 | 2171 | |
698b1515 | 2172 | /* Let's create all known keys */ |
7005b584 | 2173 | |
698b1515 WT |
2174 | for (keynum = 0; keypad_profile[keynum][0][0]; keynum++) { |
2175 | panel_bind_key(keypad_profile[keynum][0], | |
2176 | keypad_profile[keynum][1], | |
2177 | keypad_profile[keynum][2], | |
2178 | keypad_profile[keynum][3]); | |
2179 | } | |
7005b584 | 2180 | |
698b1515 WT |
2181 | init_scan_timer(); |
2182 | keypad_initialized = 1; | |
7005b584 WT |
2183 | } |
2184 | ||
7005b584 WT |
2185 | /**************************************************/ |
2186 | /* device initialization */ | |
2187 | /**************************************************/ | |
2188 | ||
698b1515 WT |
2189 | static int panel_notify_sys(struct notifier_block *this, unsigned long code, |
2190 | void *unused) | |
2191 | { | |
6d8b588c | 2192 | if (lcd.enabled && lcd.initialized) { |
698b1515 WT |
2193 | switch (code) { |
2194 | case SYS_DOWN: | |
2195 | panel_lcd_print | |
2196 | ("\x0cReloading\nSystem...\x1b[Lc\x1b[Lb\x1b[L+"); | |
2197 | break; | |
2198 | case SYS_HALT: | |
2199 | panel_lcd_print | |
2200 | ("\x0cSystem Halted.\x1b[Lc\x1b[Lb\x1b[L+"); | |
2201 | break; | |
2202 | case SYS_POWER_OFF: | |
2203 | panel_lcd_print("\x0cPower off.\x1b[Lc\x1b[Lb\x1b[L+"); | |
2204 | break; | |
2205 | default: | |
2206 | break; | |
2207 | } | |
7005b584 | 2208 | } |
698b1515 | 2209 | return NOTIFY_DONE; |
7005b584 WT |
2210 | } |
2211 | ||
2212 | static struct notifier_block panel_notifier = { | |
2213 | panel_notify_sys, | |
2214 | NULL, | |
2215 | 0 | |
2216 | }; | |
2217 | ||
698b1515 | 2218 | static void panel_attach(struct parport *port) |
7005b584 | 2219 | { |
9be83c0a SM |
2220 | struct pardev_cb panel_cb; |
2221 | ||
698b1515 WT |
2222 | if (port->number != parport) |
2223 | return; | |
2224 | ||
2225 | if (pprt) { | |
eb073a9b TY |
2226 | pr_err("%s: port->number=%d parport=%d, already registered!\n", |
2227 | __func__, port->number, parport); | |
698b1515 WT |
2228 | return; |
2229 | } | |
2230 | ||
9be83c0a SM |
2231 | memset(&panel_cb, 0, sizeof(panel_cb)); |
2232 | panel_cb.private = &pprt; | |
2233 | /* panel_cb.flags = 0 should be PARPORT_DEV_EXCL? */ | |
2234 | ||
2235 | pprt = parport_register_dev_model(port, "panel", &panel_cb, 0); | |
b565b3fb | 2236 | if (!pprt) { |
eb073a9b TY |
2237 | pr_err("%s: port->number=%d parport=%d, parport_register_device() failed\n", |
2238 | __func__, port->number, parport); | |
10f3f5b7 KV |
2239 | return; |
2240 | } | |
698b1515 WT |
2241 | |
2242 | if (parport_claim(pprt)) { | |
eb073a9b TY |
2243 | pr_err("could not claim access to parport%d. Aborting.\n", |
2244 | parport); | |
10f3f5b7 | 2245 | goto err_unreg_device; |
698b1515 WT |
2246 | } |
2247 | ||
429ccf05 HH |
2248 | /* must init LCD first, just in case an IRQ from the keypad is |
2249 | * generated at keypad init | |
2250 | */ | |
a8b2580b | 2251 | if (lcd.enabled) { |
698b1515 | 2252 | lcd_init(); |
10f3f5b7 KV |
2253 | if (misc_register(&lcd_dev)) |
2254 | goto err_unreg_device; | |
698b1515 WT |
2255 | } |
2256 | ||
a8b2580b | 2257 | if (keypad.enabled) { |
698b1515 | 2258 | keypad_init(); |
10f3f5b7 KV |
2259 | if (misc_register(&keypad_dev)) |
2260 | goto err_lcd_unreg; | |
698b1515 | 2261 | } |
bb046fef | 2262 | register_reboot_notifier(&panel_notifier); |
10f3f5b7 KV |
2263 | return; |
2264 | ||
2265 | err_lcd_unreg: | |
a8b2580b | 2266 | if (lcd.enabled) |
10f3f5b7 KV |
2267 | misc_deregister(&lcd_dev); |
2268 | err_unreg_device: | |
2269 | parport_unregister_device(pprt); | |
2270 | pprt = NULL; | |
7005b584 WT |
2271 | } |
2272 | ||
698b1515 | 2273 | static void panel_detach(struct parport *port) |
7005b584 | 2274 | { |
698b1515 WT |
2275 | if (port->number != parport) |
2276 | return; | |
2277 | ||
2278 | if (!pprt) { | |
eb073a9b TY |
2279 | pr_err("%s: port->number=%d parport=%d, nothing to unregister.\n", |
2280 | __func__, port->number, parport); | |
698b1515 WT |
2281 | return; |
2282 | } | |
b565b3fb | 2283 | if (scan_timer.function) |
7d98c63e | 2284 | del_timer_sync(&scan_timer); |
698b1515 | 2285 | |
b565b3fb | 2286 | if (pprt) { |
7d98c63e SM |
2287 | if (keypad.enabled) { |
2288 | misc_deregister(&keypad_dev); | |
2289 | keypad_initialized = 0; | |
2290 | } | |
bb046fef | 2291 | |
7d98c63e SM |
2292 | if (lcd.enabled) { |
2293 | panel_lcd_print("\x0cLCD driver " PANEL_VERSION | |
2294 | "\nunloaded.\x1b[Lc\x1b[Lb\x1b[L-"); | |
2295 | misc_deregister(&lcd_dev); | |
2296 | lcd.initialized = false; | |
2297 | } | |
698b1515 | 2298 | |
7d98c63e SM |
2299 | /* TODO: free all input signals */ |
2300 | parport_release(pprt); | |
2301 | parport_unregister_device(pprt); | |
2302 | pprt = NULL; | |
2303 | unregister_reboot_notifier(&panel_notifier); | |
0b0595bf | 2304 | } |
7005b584 WT |
2305 | } |
2306 | ||
2307 | static struct parport_driver panel_driver = { | |
698b1515 | 2308 | .name = "panel", |
9be83c0a | 2309 | .match_port = panel_attach, |
698b1515 | 2310 | .detach = panel_detach, |
9be83c0a | 2311 | .devmodel = true, |
7005b584 WT |
2312 | }; |
2313 | ||
2314 | /* init function */ | |
d9114767 | 2315 | static int __init panel_init_module(void) |
698b1515 | 2316 | { |
e134201b | 2317 | int selected_keypad_type = NOT_SET, err; |
698b1515 | 2318 | |
698b1515 WT |
2319 | /* take care of an eventual profile */ |
2320 | switch (profile) { | |
429ccf05 HH |
2321 | case PANEL_PROFILE_CUSTOM: |
2322 | /* custom profile */ | |
87b8e0c8 MG |
2323 | selected_keypad_type = DEFAULT_KEYPAD_TYPE; |
2324 | selected_lcd_type = DEFAULT_LCD_TYPE; | |
698b1515 | 2325 | break; |
429ccf05 HH |
2326 | case PANEL_PROFILE_OLD: |
2327 | /* 8 bits, 2*16, old keypad */ | |
87b8e0c8 MG |
2328 | selected_keypad_type = KEYPAD_TYPE_OLD; |
2329 | selected_lcd_type = LCD_TYPE_OLD; | |
2330 | ||
2331 | /* TODO: This two are a little hacky, sort it out later */ | |
2d35bcf6 | 2332 | if (lcd_width == NOT_SET) |
698b1515 | 2333 | lcd_width = 16; |
2d35bcf6 | 2334 | if (lcd_hwidth == NOT_SET) |
698b1515 WT |
2335 | lcd_hwidth = 16; |
2336 | break; | |
429ccf05 HH |
2337 | case PANEL_PROFILE_NEW: |
2338 | /* serial, 2*16, new keypad */ | |
87b8e0c8 MG |
2339 | selected_keypad_type = KEYPAD_TYPE_NEW; |
2340 | selected_lcd_type = LCD_TYPE_KS0074; | |
698b1515 | 2341 | break; |
429ccf05 HH |
2342 | case PANEL_PROFILE_HANTRONIX: |
2343 | /* 8 bits, 2*16 hantronix-like, no keypad */ | |
87b8e0c8 MG |
2344 | selected_keypad_type = KEYPAD_TYPE_NONE; |
2345 | selected_lcd_type = LCD_TYPE_HANTRONIX; | |
698b1515 | 2346 | break; |
429ccf05 HH |
2347 | case PANEL_PROFILE_NEXCOM: |
2348 | /* generic 8 bits, 2*16, nexcom keypad, eg. Nexcom. */ | |
87b8e0c8 MG |
2349 | selected_keypad_type = KEYPAD_TYPE_NEXCOM; |
2350 | selected_lcd_type = LCD_TYPE_NEXCOM; | |
698b1515 | 2351 | break; |
429ccf05 HH |
2352 | case PANEL_PROFILE_LARGE: |
2353 | /* 8 bits, 2*40, old keypad */ | |
87b8e0c8 MG |
2354 | selected_keypad_type = KEYPAD_TYPE_OLD; |
2355 | selected_lcd_type = LCD_TYPE_OLD; | |
698b1515 WT |
2356 | break; |
2357 | } | |
2358 | ||
87b8e0c8 MG |
2359 | /* |
2360 | * Overwrite selection with module param values (both keypad and lcd), | |
2361 | * where the deprecated params have lower prio. | |
2362 | */ | |
1a4b2e3e | 2363 | if (keypad_enabled != NOT_SET) |
87b8e0c8 | 2364 | selected_keypad_type = keypad_enabled; |
1a4b2e3e | 2365 | if (keypad_type != NOT_SET) |
87b8e0c8 MG |
2366 | selected_keypad_type = keypad_type; |
2367 | ||
2368 | keypad.enabled = (selected_keypad_type > 0); | |
2369 | ||
1a4b2e3e | 2370 | if (lcd_enabled != NOT_SET) |
87b8e0c8 | 2371 | selected_lcd_type = lcd_enabled; |
1a4b2e3e | 2372 | if (lcd_type != NOT_SET) |
87b8e0c8 MG |
2373 | selected_lcd_type = lcd_type; |
2374 | ||
2375 | lcd.enabled = (selected_lcd_type > 0); | |
698b1515 | 2376 | |
733345ec SM |
2377 | if (lcd.enabled) { |
2378 | /* | |
2379 | * Init lcd struct with load-time values to preserve exact | |
2380 | * current functionality (at least for now). | |
2381 | */ | |
2382 | lcd.height = lcd_height; | |
2383 | lcd.width = lcd_width; | |
2384 | lcd.bwidth = lcd_bwidth; | |
2385 | lcd.hwidth = lcd_hwidth; | |
2386 | lcd.charset = lcd_charset; | |
2387 | lcd.proto = lcd_proto; | |
2388 | lcd.pins.e = lcd_e_pin; | |
2389 | lcd.pins.rs = lcd_rs_pin; | |
2390 | lcd.pins.rw = lcd_rw_pin; | |
2391 | lcd.pins.cl = lcd_cl_pin; | |
2392 | lcd.pins.da = lcd_da_pin; | |
2393 | lcd.pins.bl = lcd_bl_pin; | |
2394 | ||
2395 | /* Leave it for now, just in case */ | |
2396 | lcd.esc_seq.len = -1; | |
2397 | } | |
2398 | ||
87b8e0c8 | 2399 | switch (selected_keypad_type) { |
698b1515 WT |
2400 | case KEYPAD_TYPE_OLD: |
2401 | keypad_profile = old_keypad_profile; | |
2402 | break; | |
2403 | case KEYPAD_TYPE_NEW: | |
2404 | keypad_profile = new_keypad_profile; | |
2405 | break; | |
2406 | case KEYPAD_TYPE_NEXCOM: | |
2407 | keypad_profile = nexcom_keypad_profile; | |
2408 | break; | |
2409 | default: | |
2410 | keypad_profile = NULL; | |
2411 | break; | |
2412 | } | |
2413 | ||
a8b2580b | 2414 | if (!lcd.enabled && !keypad.enabled) { |
f43de77c | 2415 | /* no device enabled, let's exit */ |
eb073a9b | 2416 | pr_err("driver version " PANEL_VERSION " disabled.\n"); |
698b1515 | 2417 | return -ENODEV; |
7005b584 | 2418 | } |
7005b584 | 2419 | |
e134201b SM |
2420 | err = parport_register_driver(&panel_driver); |
2421 | if (err) { | |
f43de77c | 2422 | pr_err("could not register with parport. Aborting.\n"); |
e134201b | 2423 | return err; |
f43de77c SM |
2424 | } |
2425 | ||
698b1515 | 2426 | if (pprt) |
493aa896 TY |
2427 | pr_info("driver version " PANEL_VERSION |
2428 | " registered on parport%d (io=0x%lx).\n", parport, | |
2429 | pprt->port->base); | |
698b1515 | 2430 | else |
493aa896 TY |
2431 | pr_info("driver version " PANEL_VERSION |
2432 | " not yet registered\n"); | |
698b1515 WT |
2433 | return 0; |
2434 | } | |
7005b584 | 2435 | |
f6d1fcfe | 2436 | static void __exit panel_cleanup_module(void) |
698b1515 | 2437 | { |
698b1515 | 2438 | parport_unregister_driver(&panel_driver); |
7005b584 | 2439 | } |
7005b584 | 2440 | |
7005b584 WT |
2441 | module_init(panel_init_module); |
2442 | module_exit(panel_cleanup_module); | |
2443 | MODULE_AUTHOR("Willy Tarreau"); | |
2444 | MODULE_LICENSE("GPL"); | |
7005b584 WT |
2445 | |
2446 | /* | |
2447 | * Local variables: | |
2448 | * c-indent-level: 4 | |
2449 | * tab-width: 8 | |
2450 | * End: | |
2451 | */ |