1 | // SPDX-License-Identifier: GPL-2.0+ |
2 | /* |
3 | * Front panel driver for Linux |
4 | * Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu> |
5 | * Copyright (C) 2016-2017 Glider bvba |
6 | * |
7 | * This code drives an LCD module (/dev/lcd), and a keypad (/dev/keypad) |
8 | * connected to a parallel printer port. |
9 | * |
10 | * The LCD module may either be an HD44780-like 8-bit parallel LCD, or a 1-bit |
11 | * serial module compatible with Samsung's KS0074. The pins may be connected in |
12 | * any combination, everything is programmable. |
13 | * |
14 | * The keypad consists in a matrix of push buttons connecting input pins to |
15 | * data output pins or to the ground. The combinations have to be hard-coded |
16 | * in the driver, though several profiles exist and adding new ones is easy. |
17 | * |
18 | * Several profiles are provided for commonly found LCD+keypad modules on the |
19 | * market, such as those found in Nexcom's appliances. |
20 | * |
21 | * FIXME: |
22 | * - the initialization/deinitialization process is very dirty and should |
23 | * be rewritten. It may even be buggy. |
24 | * |
25 | * TODO: |
26 | * - document 24 keys keyboard (3 rows of 8 cols, 32 diodes + 2 inputs) |
27 | * - make the LCD a part of a virtual screen of Vx*Vy |
28 | * - make the inputs list smp-safe |
29 | * - change the keyboard to a double mapping : signals -> key_id -> values |
30 | * so that applications can change values without knowing signals |
31 | * |
32 | */ |
33 | |
34 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
35 | |
36 | #include <linux/module.h> |
37 | |
38 | #include <linux/types.h> |
39 | #include <linux/errno.h> |
40 | #include <linux/signal.h> |
41 | #include <linux/sched.h> |
42 | #include <linux/spinlock.h> |
43 | #include <linux/interrupt.h> |
44 | #include <linux/miscdevice.h> |
45 | #include <linux/slab.h> |
46 | #include <linux/ioport.h> |
47 | #include <linux/fcntl.h> |
48 | #include <linux/init.h> |
49 | #include <linux/delay.h> |
50 | #include <linux/kernel.h> |
51 | #include <linux/ctype.h> |
52 | #include <linux/parport.h> |
53 | #include <linux/list.h> |
54 | |
55 | #include <linux/io.h> |
56 | #include <linux/uaccess.h> |
57 | |
58 | #include "charlcd.h" |
59 | #include "hd44780_common.h" |
60 | |
61 | #define LCD_MAXBYTES 256 /* max burst write */ |
62 | |
63 | #define KEYPAD_BUFFER 64 |
64 | |
65 | /* poll the keyboard this every second */ |
66 | #define INPUT_POLL_TIME (HZ / 50) |
67 | /* a key starts to repeat after this times INPUT_POLL_TIME */ |
68 | #define KEYPAD_REP_START (10) |
69 | /* a key repeats this times INPUT_POLL_TIME */ |
70 | #define KEYPAD_REP_DELAY (2) |
71 | |
72 | /* converts an r_str() input to an active high, bits string : 000BAOSE */ |
73 | #define PNL_PINPUT(a) ((((unsigned char)(a)) ^ 0x7F) >> 3) |
74 | |
75 | #define PNL_PBUSY 0x80 /* inverted input, active low */ |
76 | #define PNL_PACK 0x40 /* direct input, active low */ |
77 | #define PNL_POUTPA 0x20 /* direct input, active high */ |
78 | #define PNL_PSELECD 0x10 /* direct input, active high */ |
79 | #define PNL_PERRORP 0x08 /* direct input, active low */ |
80 | |
81 | #define PNL_PBIDIR 0x20 /* bi-directional ports */ |
82 | /* high to read data in or-ed with data out */ |
83 | #define PNL_PINTEN 0x10 |
84 | #define PNL_PSELECP 0x08 /* inverted output, active low */ |
85 | #define PNL_PINITP 0x04 /* direct output, active low */ |
86 | #define PNL_PAUTOLF 0x02 /* inverted output, active low */ |
87 | #define PNL_PSTROBE 0x01 /* inverted output */ |
88 | |
89 | #define PNL_PD0 0x01 |
90 | #define PNL_PD1 0x02 |
91 | #define PNL_PD2 0x04 |
92 | #define PNL_PD3 0x08 |
93 | #define PNL_PD4 0x10 |
94 | #define PNL_PD5 0x20 |
95 | #define PNL_PD6 0x40 |
96 | #define PNL_PD7 0x80 |
97 | |
98 | #define PIN_NONE 0 |
99 | #define PIN_STROBE 1 |
100 | #define PIN_D0 2 |
101 | #define PIN_D1 3 |
102 | #define PIN_D2 4 |
103 | #define PIN_D3 5 |
104 | #define PIN_D4 6 |
105 | #define PIN_D5 7 |
106 | #define PIN_D6 8 |
107 | #define PIN_D7 9 |
108 | #define PIN_AUTOLF 14 |
109 | #define PIN_INITP 16 |
110 | #define PIN_SELECP 17 |
111 | #define PIN_NOT_SET 127 |
112 | |
113 | #define NOT_SET -1 |
114 | |
115 | /* macros to simplify use of the parallel port */ |
116 | #define r_ctr(x) (parport_read_control((x)->port)) |
117 | #define r_dtr(x) (parport_read_data((x)->port)) |
118 | #define r_str(x) (parport_read_status((x)->port)) |
119 | #define w_ctr(x, y) (parport_write_control((x)->port, (y))) |
120 | #define w_dtr(x, y) (parport_write_data((x)->port, (y))) |
121 | |
122 | /* this defines which bits are to be used and which ones to be ignored */ |
123 | /* logical or of the output bits involved in the scan matrix */ |
124 | static __u8 scan_mask_o; |
125 | /* logical or of the input bits involved in the scan matrix */ |
126 | static __u8 scan_mask_i; |
127 | |
128 | enum input_type { |
129 | INPUT_TYPE_STD, |
130 | INPUT_TYPE_KBD, |
131 | }; |
132 | |
133 | enum input_state { |
134 | INPUT_ST_LOW, |
135 | INPUT_ST_RISING, |
136 | INPUT_ST_HIGH, |
137 | INPUT_ST_FALLING, |
138 | }; |
139 | |
140 | struct logical_input { |
141 | struct list_head list; |
142 | __u64 mask; |
143 | __u64 value; |
144 | enum input_type type; |
145 | enum input_state state; |
146 | __u8 rise_time, fall_time; |
147 | __u8 rise_timer, fall_timer, high_timer; |
148 | |
149 | union { |
150 | struct { /* valid when type == INPUT_TYPE_STD */ |
151 | void (*press_fct)(int); |
152 | void (*release_fct)(int); |
153 | int press_data; |
154 | int release_data; |
155 | } std; |
156 | struct { /* valid when type == INPUT_TYPE_KBD */ |
157 | char press_str[sizeof(void *) + sizeof(int)] __nonstring; |
158 | char repeat_str[sizeof(void *) + sizeof(int)] __nonstring; |
159 | char release_str[sizeof(void *) + sizeof(int)] __nonstring; |
160 | } kbd; |
161 | } u; |
162 | }; |
163 | |
164 | static LIST_HEAD(logical_inputs); /* list of all defined logical inputs */ |
165 | |
166 | /* physical contacts history |
167 | * Physical contacts are a 45 bits string of 9 groups of 5 bits each. |
168 | * The 8 lower groups correspond to output bits 0 to 7, and the 9th group |
169 | * corresponds to the ground. |
170 | * Within each group, bits are stored in the same order as read on the port : |
171 | * BAPSE (busy=4, ack=3, paper empty=2, select=1, error=0). |
172 | * So, each __u64 is represented like this : |
173 | * 0000000000000000000BAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSE |
174 | * <-----unused------><gnd><d07><d06><d05><d04><d03><d02><d01><d00> |
175 | */ |
176 | |
177 | /* what has just been read from the I/O ports */ |
178 | static __u64 phys_read; |
179 | /* previous phys_read */ |
180 | static __u64 phys_read_prev; |
181 | /* stabilized phys_read (phys_read|phys_read_prev) */ |
182 | static __u64 phys_curr; |
183 | /* previous phys_curr */ |
184 | static __u64 phys_prev; |
185 | /* 0 means that at least one logical signal needs be computed */ |
186 | static char inputs_stable; |
187 | |
188 | /* these variables are specific to the keypad */ |
189 | static struct { |
190 | bool enabled; |
191 | } keypad; |
192 | |
193 | static char keypad_buffer[KEYPAD_BUFFER]; |
194 | static int keypad_buflen; |
195 | static int keypad_start; |
196 | static char keypressed; |
197 | static wait_queue_head_t keypad_read_wait; |
198 | |
199 | /* lcd-specific variables */ |
200 | static struct { |
201 | bool enabled; |
202 | bool initialized; |
203 | |
204 | int charset; |
205 | int proto; |
206 | |
207 | /* TODO: use union here? */ |
208 | struct { |
209 | int e; |
210 | int rs; |
211 | int rw; |
212 | int cl; |
213 | int da; |
214 | int bl; |
215 | } pins; |
216 | |
217 | struct charlcd *charlcd; |
218 | } lcd; |
219 | |
220 | /* Needed only for init */ |
221 | static int selected_lcd_type = NOT_SET; |
222 | |
223 | /* |
224 | * Bit masks to convert LCD signals to parallel port outputs. |
225 | * _d_ are values for data port, _c_ are for control port. |
226 | * [0] = signal OFF, [1] = signal ON, [2] = mask |
227 | */ |
228 | #define BIT_CLR 0 |
229 | #define BIT_SET 1 |
230 | #define BIT_MSK 2 |
231 | #define BIT_STATES 3 |
232 | /* |
233 | * one entry for each bit on the LCD |
234 | */ |
235 | #define LCD_BIT_E 0 |
236 | #define LCD_BIT_RS 1 |
237 | #define LCD_BIT_RW 2 |
238 | #define LCD_BIT_BL 3 |
239 | #define LCD_BIT_CL 4 |
240 | #define LCD_BIT_DA 5 |
241 | #define LCD_BITS 6 |
242 | |
243 | /* |
244 | * each bit can be either connected to a DATA or CTRL port |
245 | */ |
246 | #define LCD_PORT_C 0 |
247 | #define LCD_PORT_D 1 |
248 | #define LCD_PORTS 2 |
249 | |
250 | static unsigned char lcd_bits[LCD_PORTS][LCD_BITS][BIT_STATES]; |
251 | |
252 | /* |
253 | * LCD protocols |
254 | */ |
255 | #define LCD_PROTO_PARALLEL 0 |
256 | #define LCD_PROTO_SERIAL 1 |
257 | #define LCD_PROTO_TI_DA8XX_LCD 2 |
258 | |
259 | /* |
260 | * LCD character sets |
261 | */ |
262 | #define LCD_CHARSET_NORMAL 0 |
263 | #define LCD_CHARSET_KS0074 1 |
264 | |
265 | /* |
266 | * LCD types |
267 | */ |
268 | #define LCD_TYPE_NONE 0 |
269 | #define LCD_TYPE_CUSTOM 1 |
270 | #define LCD_TYPE_OLD 2 |
271 | #define LCD_TYPE_KS0074 3 |
272 | #define LCD_TYPE_HANTRONIX 4 |
273 | #define LCD_TYPE_NEXCOM 5 |
274 | |
275 | /* |
276 | * keypad types |
277 | */ |
278 | #define KEYPAD_TYPE_NONE 0 |
279 | #define KEYPAD_TYPE_OLD 1 |
280 | #define KEYPAD_TYPE_NEW 2 |
281 | #define KEYPAD_TYPE_NEXCOM 3 |
282 | |
283 | /* |
284 | * panel profiles |
285 | */ |
286 | #define PANEL_PROFILE_CUSTOM 0 |
287 | #define PANEL_PROFILE_OLD 1 |
288 | #define PANEL_PROFILE_NEW 2 |
289 | #define PANEL_PROFILE_HANTRONIX 3 |
290 | #define PANEL_PROFILE_NEXCOM 4 |
291 | #define PANEL_PROFILE_LARGE 5 |
292 | |
293 | /* |
294 | * Construct custom config from the kernel's configuration |
295 | */ |
296 | #define DEFAULT_PARPORT 0 |
297 | #define DEFAULT_PROFILE PANEL_PROFILE_LARGE |
298 | #define DEFAULT_KEYPAD_TYPE KEYPAD_TYPE_OLD |
299 | #define DEFAULT_LCD_TYPE LCD_TYPE_OLD |
300 | #define DEFAULT_LCD_HEIGHT 2 |
301 | #define DEFAULT_LCD_WIDTH 40 |
302 | #define DEFAULT_LCD_CHARSET LCD_CHARSET_NORMAL |
303 | #define DEFAULT_LCD_PROTO LCD_PROTO_PARALLEL |
304 | |
305 | #define DEFAULT_LCD_PIN_E PIN_AUTOLF |
306 | #define DEFAULT_LCD_PIN_RS PIN_SELECP |
307 | #define DEFAULT_LCD_PIN_RW PIN_INITP |
308 | #define DEFAULT_LCD_PIN_SCL PIN_STROBE |
309 | #define DEFAULT_LCD_PIN_SDA PIN_D0 |
310 | #define DEFAULT_LCD_PIN_BL PIN_NOT_SET |
311 | |
312 | #ifdef CONFIG_PANEL_PARPORT |
313 | #undef DEFAULT_PARPORT |
314 | #define DEFAULT_PARPORT CONFIG_PANEL_PARPORT |
315 | #endif |
316 | |
317 | #ifdef CONFIG_PANEL_PROFILE |
318 | #undef DEFAULT_PROFILE |
319 | #define DEFAULT_PROFILE CONFIG_PANEL_PROFILE |
320 | #endif |
321 | |
322 | #if DEFAULT_PROFILE == 0 /* custom */ |
323 | #ifdef CONFIG_PANEL_KEYPAD |
324 | #undef DEFAULT_KEYPAD_TYPE |
325 | #define DEFAULT_KEYPAD_TYPE CONFIG_PANEL_KEYPAD |
326 | #endif |
327 | |
328 | #ifdef CONFIG_PANEL_LCD |
329 | #undef DEFAULT_LCD_TYPE |
330 | #define DEFAULT_LCD_TYPE CONFIG_PANEL_LCD |
331 | #endif |
332 | |
333 | #ifdef CONFIG_PANEL_LCD_HEIGHT |
334 | #undef DEFAULT_LCD_HEIGHT |
335 | #define DEFAULT_LCD_HEIGHT CONFIG_PANEL_LCD_HEIGHT |
336 | #endif |
337 | |
338 | #ifdef CONFIG_PANEL_LCD_WIDTH |
339 | #undef DEFAULT_LCD_WIDTH |
340 | #define DEFAULT_LCD_WIDTH CONFIG_PANEL_LCD_WIDTH |
341 | #endif |
342 | |
343 | #ifdef CONFIG_PANEL_LCD_BWIDTH |
344 | #undef DEFAULT_LCD_BWIDTH |
345 | #define DEFAULT_LCD_BWIDTH CONFIG_PANEL_LCD_BWIDTH |
346 | #endif |
347 | |
348 | #ifdef CONFIG_PANEL_LCD_HWIDTH |
349 | #undef DEFAULT_LCD_HWIDTH |
350 | #define DEFAULT_LCD_HWIDTH CONFIG_PANEL_LCD_HWIDTH |
351 | #endif |
352 | |
353 | #ifdef CONFIG_PANEL_LCD_CHARSET |
354 | #undef DEFAULT_LCD_CHARSET |
355 | #define DEFAULT_LCD_CHARSET CONFIG_PANEL_LCD_CHARSET |
356 | #endif |
357 | |
358 | #ifdef CONFIG_PANEL_LCD_PROTO |
359 | #undef DEFAULT_LCD_PROTO |
360 | #define DEFAULT_LCD_PROTO CONFIG_PANEL_LCD_PROTO |
361 | #endif |
362 | |
363 | #ifdef CONFIG_PANEL_LCD_PIN_E |
364 | #undef DEFAULT_LCD_PIN_E |
365 | #define DEFAULT_LCD_PIN_E CONFIG_PANEL_LCD_PIN_E |
366 | #endif |
367 | |
368 | #ifdef CONFIG_PANEL_LCD_PIN_RS |
369 | #undef DEFAULT_LCD_PIN_RS |
370 | #define DEFAULT_LCD_PIN_RS CONFIG_PANEL_LCD_PIN_RS |
371 | #endif |
372 | |
373 | #ifdef CONFIG_PANEL_LCD_PIN_RW |
374 | #undef DEFAULT_LCD_PIN_RW |
375 | #define DEFAULT_LCD_PIN_RW CONFIG_PANEL_LCD_PIN_RW |
376 | #endif |
377 | |
378 | #ifdef CONFIG_PANEL_LCD_PIN_SCL |
379 | #undef DEFAULT_LCD_PIN_SCL |
380 | #define DEFAULT_LCD_PIN_SCL CONFIG_PANEL_LCD_PIN_SCL |
381 | #endif |
382 | |
383 | #ifdef CONFIG_PANEL_LCD_PIN_SDA |
384 | #undef DEFAULT_LCD_PIN_SDA |
385 | #define DEFAULT_LCD_PIN_SDA CONFIG_PANEL_LCD_PIN_SDA |
386 | #endif |
387 | |
388 | #ifdef CONFIG_PANEL_LCD_PIN_BL |
389 | #undef DEFAULT_LCD_PIN_BL |
390 | #define DEFAULT_LCD_PIN_BL CONFIG_PANEL_LCD_PIN_BL |
391 | #endif |
392 | |
393 | #endif /* DEFAULT_PROFILE == 0 */ |
394 | |
395 | /* global variables */ |
396 | |
397 | /* Device single-open policy control */ |
398 | static atomic_t keypad_available = ATOMIC_INIT(1); |
399 | |
400 | static struct pardevice *pprt; |
401 | |
402 | static int keypad_initialized; |
403 | |
404 | static DEFINE_SPINLOCK(pprt_lock); |
405 | static struct timer_list scan_timer; |
406 | |
407 | MODULE_DESCRIPTION("Generic parallel port LCD/Keypad driver" ); |
408 | |
409 | static int parport = DEFAULT_PARPORT; |
410 | module_param(parport, int, 0000); |
411 | MODULE_PARM_DESC(parport, "Parallel port index (0=lpt1, 1=lpt2, ...)" ); |
412 | |
413 | static int profile = DEFAULT_PROFILE; |
414 | module_param(profile, int, 0000); |
415 | MODULE_PARM_DESC(profile, |
416 | "1=16x2 old kp; 2=serial 16x2, new kp; 3=16x2 hantronix; " |
417 | "4=16x2 nexcom; default=40x2, old kp" ); |
418 | |
419 | static int keypad_type = NOT_SET; |
420 | module_param(keypad_type, int, 0000); |
421 | MODULE_PARM_DESC(keypad_type, |
422 | "Keypad type: 0=none, 1=old 6 keys, 2=new 6+1 keys, 3=nexcom 4 keys" ); |
423 | |
424 | static int lcd_type = NOT_SET; |
425 | module_param(lcd_type, int, 0000); |
426 | MODULE_PARM_DESC(lcd_type, |
427 | "LCD type: 0=none, 1=compiled-in, 2=old, 3=serial ks0074, 4=hantronix, 5=nexcom" ); |
428 | |
429 | static int lcd_height = NOT_SET; |
430 | module_param(lcd_height, int, 0000); |
431 | MODULE_PARM_DESC(lcd_height, "Number of lines on the LCD" ); |
432 | |
433 | static int lcd_width = NOT_SET; |
434 | module_param(lcd_width, int, 0000); |
435 | MODULE_PARM_DESC(lcd_width, "Number of columns on the LCD" ); |
436 | |
437 | static int lcd_bwidth = NOT_SET; /* internal buffer width (usually 40) */ |
438 | module_param(lcd_bwidth, int, 0000); |
439 | MODULE_PARM_DESC(lcd_bwidth, "Internal LCD line width (40)" ); |
440 | |
441 | static int lcd_hwidth = NOT_SET; /* hardware buffer width (usually 64) */ |
442 | module_param(lcd_hwidth, int, 0000); |
443 | MODULE_PARM_DESC(lcd_hwidth, "LCD line hardware address (64)" ); |
444 | |
445 | static int lcd_charset = NOT_SET; |
446 | module_param(lcd_charset, int, 0000); |
447 | MODULE_PARM_DESC(lcd_charset, "LCD character set: 0=standard, 1=KS0074" ); |
448 | |
449 | static int lcd_proto = NOT_SET; |
450 | module_param(lcd_proto, int, 0000); |
451 | MODULE_PARM_DESC(lcd_proto, |
452 | "LCD communication: 0=parallel (//), 1=serial, 2=TI LCD Interface" ); |
453 | |
454 | /* |
455 | * These are the parallel port pins the LCD control signals are connected to. |
456 | * Set this to 0 if the signal is not used. Set it to its opposite value |
457 | * (negative) if the signal is negated. -MAXINT is used to indicate that the |
458 | * pin has not been explicitly specified. |
459 | * |
460 | * WARNING! no check will be performed about collisions with keypad ! |
461 | */ |
462 | |
463 | static int lcd_e_pin = PIN_NOT_SET; |
464 | module_param(lcd_e_pin, int, 0000); |
465 | MODULE_PARM_DESC(lcd_e_pin, |
466 | "# of the // port pin connected to LCD 'E' signal, with polarity (-17..17)" ); |
467 | |
468 | static int lcd_rs_pin = PIN_NOT_SET; |
469 | module_param(lcd_rs_pin, int, 0000); |
470 | MODULE_PARM_DESC(lcd_rs_pin, |
471 | "# of the // port pin connected to LCD 'RS' signal, with polarity (-17..17)" ); |
472 | |
473 | static int lcd_rw_pin = PIN_NOT_SET; |
474 | module_param(lcd_rw_pin, int, 0000); |
475 | MODULE_PARM_DESC(lcd_rw_pin, |
476 | "# of the // port pin connected to LCD 'RW' signal, with polarity (-17..17)" ); |
477 | |
478 | static int lcd_cl_pin = PIN_NOT_SET; |
479 | module_param(lcd_cl_pin, int, 0000); |
480 | MODULE_PARM_DESC(lcd_cl_pin, |
481 | "# of the // port pin connected to serial LCD 'SCL' signal, with polarity (-17..17)" ); |
482 | |
483 | static int lcd_da_pin = PIN_NOT_SET; |
484 | module_param(lcd_da_pin, int, 0000); |
485 | MODULE_PARM_DESC(lcd_da_pin, |
486 | "# of the // port pin connected to serial LCD 'SDA' signal, with polarity (-17..17)" ); |
487 | |
488 | static int lcd_bl_pin = PIN_NOT_SET; |
489 | module_param(lcd_bl_pin, int, 0000); |
490 | MODULE_PARM_DESC(lcd_bl_pin, |
491 | "# of the // port pin connected to LCD backlight, with polarity (-17..17)" ); |
492 | |
493 | /* Deprecated module parameters - consider not using them anymore */ |
494 | |
495 | static int lcd_enabled = NOT_SET; |
496 | module_param(lcd_enabled, int, 0000); |
497 | MODULE_PARM_DESC(lcd_enabled, "Deprecated option, use lcd_type instead" ); |
498 | |
499 | static int keypad_enabled = NOT_SET; |
500 | module_param(keypad_enabled, int, 0000); |
501 | MODULE_PARM_DESC(keypad_enabled, "Deprecated option, use keypad_type instead" ); |
502 | |
503 | /* for some LCD drivers (ks0074) we need a charset conversion table. */ |
504 | static const unsigned char lcd_char_conv_ks0074[256] = { |
505 | /* 0|8 1|9 2|A 3|B 4|C 5|D 6|E 7|F */ |
506 | /* 0x00 */ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, |
507 | /* 0x08 */ 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, |
508 | /* 0x10 */ 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, |
509 | /* 0x18 */ 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, |
510 | /* 0x20 */ 0x20, 0x21, 0x22, 0x23, 0xa2, 0x25, 0x26, 0x27, |
511 | /* 0x28 */ 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, |
512 | /* 0x30 */ 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, |
513 | /* 0x38 */ 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, |
514 | /* 0x40 */ 0xa0, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, |
515 | /* 0x48 */ 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, |
516 | /* 0x50 */ 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, |
517 | /* 0x58 */ 0x58, 0x59, 0x5a, 0xfa, 0xfb, 0xfc, 0x1d, 0xc4, |
518 | /* 0x60 */ 0x96, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, |
519 | /* 0x68 */ 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, |
520 | /* 0x70 */ 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, |
521 | /* 0x78 */ 0x78, 0x79, 0x7a, 0xfd, 0xfe, 0xff, 0xce, 0x20, |
522 | /* 0x80 */ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, |
523 | /* 0x88 */ 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, |
524 | /* 0x90 */ 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, |
525 | /* 0x98 */ 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, |
526 | /* 0xA0 */ 0x20, 0x40, 0xb1, 0xa1, 0x24, 0xa3, 0xfe, 0x5f, |
527 | /* 0xA8 */ 0x22, 0xc8, 0x61, 0x14, 0x97, 0x2d, 0xad, 0x96, |
528 | /* 0xB0 */ 0x80, 0x8c, 0x82, 0x83, 0x27, 0x8f, 0x86, 0xdd, |
529 | /* 0xB8 */ 0x2c, 0x81, 0x6f, 0x15, 0x8b, 0x8a, 0x84, 0x60, |
530 | /* 0xC0 */ 0xe2, 0xe2, 0xe2, 0x5b, 0x5b, 0xae, 0xbc, 0xa9, |
531 | /* 0xC8 */ 0xc5, 0xbf, 0xc6, 0xf1, 0xe3, 0xe3, 0xe3, 0xe3, |
532 | /* 0xD0 */ 0x44, 0x5d, 0xa8, 0xe4, 0xec, 0xec, 0x5c, 0x78, |
533 | /* 0xD8 */ 0xab, 0xa6, 0xe5, 0x5e, 0x5e, 0xe6, 0xaa, 0xbe, |
534 | /* 0xE0 */ 0x7f, 0xe7, 0xaf, 0x7b, 0x7b, 0xaf, 0xbd, 0xc8, |
535 | /* 0xE8 */ 0xa4, 0xa5, 0xc7, 0xf6, 0xa7, 0xe8, 0x69, 0x69, |
536 | /* 0xF0 */ 0xed, 0x7d, 0xa8, 0xe4, 0xec, 0x5c, 0x5c, 0x25, |
537 | /* 0xF8 */ 0xac, 0xa6, 0xea, 0xef, 0x7e, 0xeb, 0xb2, 0x79, |
538 | }; |
539 | |
540 | static const char old_keypad_profile[][4][9] = { |
541 | {"S0" , "Left\n" , "Left\n" , "" }, |
542 | {"S1" , "Down\n" , "Down\n" , "" }, |
543 | {"S2" , "Up\n" , "Up\n" , "" }, |
544 | {"S3" , "Right\n" , "Right\n" , "" }, |
545 | {"S4" , "Esc\n" , "Esc\n" , "" }, |
546 | {"S5" , "Ret\n" , "Ret\n" , "" }, |
547 | {"" , "" , "" , "" } |
548 | }; |
549 | |
550 | /* signals, press, repeat, release */ |
551 | static const char new_keypad_profile[][4][9] = { |
552 | {"S0" , "Left\n" , "Left\n" , "" }, |
553 | {"S1" , "Down\n" , "Down\n" , "" }, |
554 | {"S2" , "Up\n" , "Up\n" , "" }, |
555 | {"S3" , "Right\n" , "Right\n" , "" }, |
556 | {"S4s5" , "" , "Esc\n" , "Esc\n" }, |
557 | {"s4S5" , "" , "Ret\n" , "Ret\n" }, |
558 | {"S4S5" , "Help\n" , "" , "" }, |
559 | /* add new signals above this line */ |
560 | {"" , "" , "" , "" } |
561 | }; |
562 | |
563 | /* signals, press, repeat, release */ |
564 | static const char nexcom_keypad_profile[][4][9] = { |
565 | {"a-p-e-" , "Down\n" , "Down\n" , "" }, |
566 | {"a-p-E-" , "Ret\n" , "Ret\n" , "" }, |
567 | {"a-P-E-" , "Esc\n" , "Esc\n" , "" }, |
568 | {"a-P-e-" , "Up\n" , "Up\n" , "" }, |
569 | /* add new signals above this line */ |
570 | {"" , "" , "" , "" } |
571 | }; |
572 | |
573 | static const char (*keypad_profile)[4][9] = old_keypad_profile; |
574 | |
575 | static DECLARE_BITMAP(bits, LCD_BITS); |
576 | |
577 | static void lcd_get_bits(unsigned int port, int *val) |
578 | { |
579 | unsigned int bit, state; |
580 | |
581 | for (bit = 0; bit < LCD_BITS; bit++) { |
582 | state = test_bit(bit, bits) ? BIT_SET : BIT_CLR; |
583 | *val &= lcd_bits[port][bit][BIT_MSK]; |
584 | *val |= lcd_bits[port][bit][state]; |
585 | } |
586 | } |
587 | |
588 | /* sets data port bits according to current signals values */ |
589 | static int set_data_bits(void) |
590 | { |
591 | int val; |
592 | |
593 | val = r_dtr(pprt); |
594 | lcd_get_bits(LCD_PORT_D, val: &val); |
595 | w_dtr(pprt, val); |
596 | return val; |
597 | } |
598 | |
599 | /* sets ctrl port bits according to current signals values */ |
600 | static int set_ctrl_bits(void) |
601 | { |
602 | int val; |
603 | |
604 | val = r_ctr(pprt); |
605 | lcd_get_bits(LCD_PORT_C, val: &val); |
606 | w_ctr(pprt, val); |
607 | return val; |
608 | } |
609 | |
610 | /* sets ctrl & data port bits according to current signals values */ |
611 | static void panel_set_bits(void) |
612 | { |
613 | set_data_bits(); |
614 | set_ctrl_bits(); |
615 | } |
616 | |
617 | /* |
618 | * Converts a parallel port pin (from -25 to 25) to data and control ports |
619 | * masks, and data and control port bits. The signal will be considered |
620 | * unconnected if it's on pin 0 or an invalid pin (<-25 or >25). |
621 | * |
622 | * Result will be used this way : |
623 | * out(dport, in(dport) & d_val[2] | d_val[signal_state]) |
624 | * out(cport, in(cport) & c_val[2] | c_val[signal_state]) |
625 | */ |
626 | static void pin_to_bits(int pin, unsigned char *d_val, unsigned char *c_val) |
627 | { |
628 | int d_bit, c_bit, inv; |
629 | |
630 | d_val[0] = 0; |
631 | c_val[0] = 0; |
632 | d_val[1] = 0; |
633 | c_val[1] = 0; |
634 | d_val[2] = 0xFF; |
635 | c_val[2] = 0xFF; |
636 | |
637 | if (pin == 0) |
638 | return; |
639 | |
640 | inv = (pin < 0); |
641 | if (inv) |
642 | pin = -pin; |
643 | |
644 | d_bit = 0; |
645 | c_bit = 0; |
646 | |
647 | switch (pin) { |
648 | case PIN_STROBE: /* strobe, inverted */ |
649 | c_bit = PNL_PSTROBE; |
650 | inv = !inv; |
651 | break; |
652 | case PIN_D0...PIN_D7: /* D0 - D7 = 2 - 9 */ |
653 | d_bit = 1 << (pin - 2); |
654 | break; |
655 | case PIN_AUTOLF: /* autofeed, inverted */ |
656 | c_bit = PNL_PAUTOLF; |
657 | inv = !inv; |
658 | break; |
659 | case PIN_INITP: /* init, direct */ |
660 | c_bit = PNL_PINITP; |
661 | break; |
662 | case PIN_SELECP: /* select_in, inverted */ |
663 | c_bit = PNL_PSELECP; |
664 | inv = !inv; |
665 | break; |
666 | default: /* unknown pin, ignore */ |
667 | break; |
668 | } |
669 | |
670 | if (c_bit) { |
671 | c_val[2] &= ~c_bit; |
672 | c_val[!inv] = c_bit; |
673 | } else if (d_bit) { |
674 | d_val[2] &= ~d_bit; |
675 | d_val[!inv] = d_bit; |
676 | } |
677 | } |
678 | |
679 | /* |
680 | * send a serial byte to the LCD panel. The caller is responsible for locking |
681 | * if needed. |
682 | */ |
683 | static void lcd_send_serial(int byte) |
684 | { |
685 | int bit; |
686 | |
687 | /* |
688 | * the data bit is set on D0, and the clock on STROBE. |
689 | * LCD reads D0 on STROBE's rising edge. |
690 | */ |
691 | for (bit = 0; bit < 8; bit++) { |
692 | clear_bit(LCD_BIT_CL, addr: bits); /* CLK low */ |
693 | panel_set_bits(); |
694 | if (byte & 1) { |
695 | set_bit(LCD_BIT_DA, addr: bits); |
696 | } else { |
697 | clear_bit(LCD_BIT_DA, addr: bits); |
698 | } |
699 | |
700 | panel_set_bits(); |
701 | udelay(2); /* maintain the data during 2 us before CLK up */ |
702 | set_bit(LCD_BIT_CL, addr: bits); /* CLK high */ |
703 | panel_set_bits(); |
704 | udelay(1); /* maintain the strobe during 1 us */ |
705 | byte >>= 1; |
706 | } |
707 | } |
708 | |
709 | /* turn the backlight on or off */ |
710 | static void lcd_backlight(struct charlcd *charlcd, enum charlcd_onoff on) |
711 | { |
712 | if (lcd.pins.bl == PIN_NONE) |
713 | return; |
714 | |
715 | /* The backlight is activated by setting the AUTOFEED line to +5V */ |
716 | spin_lock_irq(lock: &pprt_lock); |
717 | if (on) |
718 | set_bit(LCD_BIT_BL, addr: bits); |
719 | else |
720 | clear_bit(LCD_BIT_BL, addr: bits); |
721 | panel_set_bits(); |
722 | spin_unlock_irq(lock: &pprt_lock); |
723 | } |
724 | |
725 | /* send a command to the LCD panel in serial mode */ |
726 | static void lcd_write_cmd_s(struct hd44780_common *hdc, int cmd) |
727 | { |
728 | spin_lock_irq(lock: &pprt_lock); |
729 | lcd_send_serial(byte: 0x1F); /* R/W=W, RS=0 */ |
730 | lcd_send_serial(byte: cmd & 0x0F); |
731 | lcd_send_serial(byte: (cmd >> 4) & 0x0F); |
732 | udelay(40); /* the shortest command takes at least 40 us */ |
733 | spin_unlock_irq(lock: &pprt_lock); |
734 | } |
735 | |
736 | /* send data to the LCD panel in serial mode */ |
737 | static void lcd_write_data_s(struct hd44780_common *hdc, int data) |
738 | { |
739 | spin_lock_irq(lock: &pprt_lock); |
740 | lcd_send_serial(byte: 0x5F); /* R/W=W, RS=1 */ |
741 | lcd_send_serial(byte: data & 0x0F); |
742 | lcd_send_serial(byte: (data >> 4) & 0x0F); |
743 | udelay(40); /* the shortest data takes at least 40 us */ |
744 | spin_unlock_irq(lock: &pprt_lock); |
745 | } |
746 | |
747 | /* send a command to the LCD panel in 8 bits parallel mode */ |
748 | static void lcd_write_cmd_p8(struct hd44780_common *hdc, int cmd) |
749 | { |
750 | spin_lock_irq(lock: &pprt_lock); |
751 | /* present the data to the data port */ |
752 | w_dtr(pprt, cmd); |
753 | udelay(20); /* maintain the data during 20 us before the strobe */ |
754 | |
755 | set_bit(LCD_BIT_E, addr: bits); |
756 | clear_bit(LCD_BIT_RS, addr: bits); |
757 | clear_bit(LCD_BIT_RW, addr: bits); |
758 | set_ctrl_bits(); |
759 | |
760 | udelay(40); /* maintain the strobe during 40 us */ |
761 | |
762 | clear_bit(LCD_BIT_E, addr: bits); |
763 | set_ctrl_bits(); |
764 | |
765 | udelay(120); /* the shortest command takes at least 120 us */ |
766 | spin_unlock_irq(lock: &pprt_lock); |
767 | } |
768 | |
769 | /* send data to the LCD panel in 8 bits parallel mode */ |
770 | static void lcd_write_data_p8(struct hd44780_common *hdc, int data) |
771 | { |
772 | spin_lock_irq(lock: &pprt_lock); |
773 | /* present the data to the data port */ |
774 | w_dtr(pprt, data); |
775 | udelay(20); /* maintain the data during 20 us before the strobe */ |
776 | |
777 | set_bit(LCD_BIT_E, addr: bits); |
778 | set_bit(LCD_BIT_RS, addr: bits); |
779 | clear_bit(LCD_BIT_RW, addr: bits); |
780 | set_ctrl_bits(); |
781 | |
782 | udelay(40); /* maintain the strobe during 40 us */ |
783 | |
784 | clear_bit(LCD_BIT_E, addr: bits); |
785 | set_ctrl_bits(); |
786 | |
787 | udelay(45); /* the shortest data takes at least 45 us */ |
788 | spin_unlock_irq(lock: &pprt_lock); |
789 | } |
790 | |
791 | /* send a command to the TI LCD panel */ |
792 | static void lcd_write_cmd_tilcd(struct hd44780_common *hdc, int cmd) |
793 | { |
794 | spin_lock_irq(lock: &pprt_lock); |
795 | /* present the data to the control port */ |
796 | w_ctr(pprt, cmd); |
797 | udelay(60); |
798 | spin_unlock_irq(lock: &pprt_lock); |
799 | } |
800 | |
801 | /* send data to the TI LCD panel */ |
802 | static void lcd_write_data_tilcd(struct hd44780_common *hdc, int data) |
803 | { |
804 | spin_lock_irq(lock: &pprt_lock); |
805 | /* present the data to the data port */ |
806 | w_dtr(pprt, data); |
807 | udelay(60); |
808 | spin_unlock_irq(lock: &pprt_lock); |
809 | } |
810 | |
811 | static const struct charlcd_ops charlcd_ops = { |
812 | .backlight = lcd_backlight, |
813 | .print = hd44780_common_print, |
814 | .gotoxy = hd44780_common_gotoxy, |
815 | .home = hd44780_common_home, |
816 | .clear_display = hd44780_common_clear_display, |
817 | .init_display = hd44780_common_init_display, |
818 | .shift_cursor = hd44780_common_shift_cursor, |
819 | .shift_display = hd44780_common_shift_display, |
820 | .display = hd44780_common_display, |
821 | .cursor = hd44780_common_cursor, |
822 | .blink = hd44780_common_blink, |
823 | .fontsize = hd44780_common_fontsize, |
824 | .lines = hd44780_common_lines, |
825 | .redefine_char = hd44780_common_redefine_char, |
826 | }; |
827 | |
828 | /* initialize the LCD driver */ |
829 | static void lcd_init(void) |
830 | { |
831 | struct charlcd *charlcd; |
832 | struct hd44780_common *hdc; |
833 | |
834 | hdc = hd44780_common_alloc(); |
835 | if (!hdc) |
836 | return; |
837 | |
838 | charlcd = charlcd_alloc(); |
839 | if (!charlcd) { |
840 | kfree(objp: hdc); |
841 | return; |
842 | } |
843 | |
844 | hdc->hd44780 = &lcd; |
845 | charlcd->drvdata = hdc; |
846 | |
847 | /* |
848 | * Init lcd struct with load-time values to preserve exact |
849 | * current functionality (at least for now). |
850 | */ |
851 | charlcd->height = lcd_height; |
852 | charlcd->width = lcd_width; |
853 | hdc->bwidth = lcd_bwidth; |
854 | hdc->hwidth = lcd_hwidth; |
855 | |
856 | switch (selected_lcd_type) { |
857 | case LCD_TYPE_OLD: |
858 | /* parallel mode, 8 bits */ |
859 | lcd.proto = LCD_PROTO_PARALLEL; |
860 | lcd.charset = LCD_CHARSET_NORMAL; |
861 | lcd.pins.e = PIN_STROBE; |
862 | lcd.pins.rs = PIN_AUTOLF; |
863 | |
864 | charlcd->width = 40; |
865 | hdc->bwidth = 40; |
866 | hdc->hwidth = 64; |
867 | charlcd->height = 2; |
868 | break; |
869 | case LCD_TYPE_KS0074: |
870 | /* serial mode, ks0074 */ |
871 | lcd.proto = LCD_PROTO_SERIAL; |
872 | lcd.charset = LCD_CHARSET_KS0074; |
873 | lcd.pins.bl = PIN_AUTOLF; |
874 | lcd.pins.cl = PIN_STROBE; |
875 | lcd.pins.da = PIN_D0; |
876 | |
877 | charlcd->width = 16; |
878 | hdc->bwidth = 40; |
879 | hdc->hwidth = 16; |
880 | charlcd->height = 2; |
881 | break; |
882 | case LCD_TYPE_NEXCOM: |
883 | /* parallel mode, 8 bits, generic */ |
884 | lcd.proto = LCD_PROTO_PARALLEL; |
885 | lcd.charset = LCD_CHARSET_NORMAL; |
886 | lcd.pins.e = PIN_AUTOLF; |
887 | lcd.pins.rs = PIN_SELECP; |
888 | lcd.pins.rw = PIN_INITP; |
889 | |
890 | charlcd->width = 16; |
891 | hdc->bwidth = 40; |
892 | hdc->hwidth = 64; |
893 | charlcd->height = 2; |
894 | break; |
895 | case LCD_TYPE_CUSTOM: |
896 | /* customer-defined */ |
897 | lcd.proto = DEFAULT_LCD_PROTO; |
898 | lcd.charset = DEFAULT_LCD_CHARSET; |
899 | /* default geometry will be set later */ |
900 | break; |
901 | case LCD_TYPE_HANTRONIX: |
902 | /* parallel mode, 8 bits, hantronix-like */ |
903 | default: |
904 | lcd.proto = LCD_PROTO_PARALLEL; |
905 | lcd.charset = LCD_CHARSET_NORMAL; |
906 | lcd.pins.e = PIN_STROBE; |
907 | lcd.pins.rs = PIN_SELECP; |
908 | |
909 | charlcd->width = 16; |
910 | hdc->bwidth = 40; |
911 | hdc->hwidth = 64; |
912 | charlcd->height = 2; |
913 | break; |
914 | } |
915 | |
916 | /* Overwrite with module params set on loading */ |
917 | if (lcd_height != NOT_SET) |
918 | charlcd->height = lcd_height; |
919 | if (lcd_width != NOT_SET) |
920 | charlcd->width = lcd_width; |
921 | if (lcd_bwidth != NOT_SET) |
922 | hdc->bwidth = lcd_bwidth; |
923 | if (lcd_hwidth != NOT_SET) |
924 | hdc->hwidth = lcd_hwidth; |
925 | if (lcd_charset != NOT_SET) |
926 | lcd.charset = lcd_charset; |
927 | if (lcd_proto != NOT_SET) |
928 | lcd.proto = lcd_proto; |
929 | if (lcd_e_pin != PIN_NOT_SET) |
930 | lcd.pins.e = lcd_e_pin; |
931 | if (lcd_rs_pin != PIN_NOT_SET) |
932 | lcd.pins.rs = lcd_rs_pin; |
933 | if (lcd_rw_pin != PIN_NOT_SET) |
934 | lcd.pins.rw = lcd_rw_pin; |
935 | if (lcd_cl_pin != PIN_NOT_SET) |
936 | lcd.pins.cl = lcd_cl_pin; |
937 | if (lcd_da_pin != PIN_NOT_SET) |
938 | lcd.pins.da = lcd_da_pin; |
939 | if (lcd_bl_pin != PIN_NOT_SET) |
940 | lcd.pins.bl = lcd_bl_pin; |
941 | |
942 | /* this is used to catch wrong and default values */ |
943 | if (charlcd->width <= 0) |
944 | charlcd->width = DEFAULT_LCD_WIDTH; |
945 | if (hdc->bwidth <= 0) |
946 | hdc->bwidth = DEFAULT_LCD_BWIDTH; |
947 | if (hdc->hwidth <= 0) |
948 | hdc->hwidth = DEFAULT_LCD_HWIDTH; |
949 | if (charlcd->height <= 0) |
950 | charlcd->height = DEFAULT_LCD_HEIGHT; |
951 | |
952 | if (lcd.proto == LCD_PROTO_SERIAL) { /* SERIAL */ |
953 | charlcd->ops = &charlcd_ops; |
954 | hdc->write_data = lcd_write_data_s; |
955 | hdc->write_cmd = lcd_write_cmd_s; |
956 | |
957 | if (lcd.pins.cl == PIN_NOT_SET) |
958 | lcd.pins.cl = DEFAULT_LCD_PIN_SCL; |
959 | if (lcd.pins.da == PIN_NOT_SET) |
960 | lcd.pins.da = DEFAULT_LCD_PIN_SDA; |
961 | |
962 | } else if (lcd.proto == LCD_PROTO_PARALLEL) { /* PARALLEL */ |
963 | charlcd->ops = &charlcd_ops; |
964 | hdc->write_data = lcd_write_data_p8; |
965 | hdc->write_cmd = lcd_write_cmd_p8; |
966 | |
967 | if (lcd.pins.e == PIN_NOT_SET) |
968 | lcd.pins.e = DEFAULT_LCD_PIN_E; |
969 | if (lcd.pins.rs == PIN_NOT_SET) |
970 | lcd.pins.rs = DEFAULT_LCD_PIN_RS; |
971 | if (lcd.pins.rw == PIN_NOT_SET) |
972 | lcd.pins.rw = DEFAULT_LCD_PIN_RW; |
973 | } else { |
974 | charlcd->ops = &charlcd_ops; |
975 | hdc->write_data = lcd_write_data_tilcd; |
976 | hdc->write_cmd = lcd_write_cmd_tilcd; |
977 | } |
978 | |
979 | if (lcd.pins.bl == PIN_NOT_SET) |
980 | lcd.pins.bl = DEFAULT_LCD_PIN_BL; |
981 | |
982 | if (lcd.pins.e == PIN_NOT_SET) |
983 | lcd.pins.e = PIN_NONE; |
984 | if (lcd.pins.rs == PIN_NOT_SET) |
985 | lcd.pins.rs = PIN_NONE; |
986 | if (lcd.pins.rw == PIN_NOT_SET) |
987 | lcd.pins.rw = PIN_NONE; |
988 | if (lcd.pins.bl == PIN_NOT_SET) |
989 | lcd.pins.bl = PIN_NONE; |
990 | if (lcd.pins.cl == PIN_NOT_SET) |
991 | lcd.pins.cl = PIN_NONE; |
992 | if (lcd.pins.da == PIN_NOT_SET) |
993 | lcd.pins.da = PIN_NONE; |
994 | |
995 | if (lcd.charset == NOT_SET) |
996 | lcd.charset = DEFAULT_LCD_CHARSET; |
997 | |
998 | if (lcd.charset == LCD_CHARSET_KS0074) |
999 | charlcd->char_conv = lcd_char_conv_ks0074; |
1000 | else |
1001 | charlcd->char_conv = NULL; |
1002 | |
1003 | pin_to_bits(pin: lcd.pins.e, d_val: lcd_bits[LCD_PORT_D][LCD_BIT_E], |
1004 | c_val: lcd_bits[LCD_PORT_C][LCD_BIT_E]); |
1005 | pin_to_bits(pin: lcd.pins.rs, d_val: lcd_bits[LCD_PORT_D][LCD_BIT_RS], |
1006 | c_val: lcd_bits[LCD_PORT_C][LCD_BIT_RS]); |
1007 | pin_to_bits(pin: lcd.pins.rw, d_val: lcd_bits[LCD_PORT_D][LCD_BIT_RW], |
1008 | c_val: lcd_bits[LCD_PORT_C][LCD_BIT_RW]); |
1009 | pin_to_bits(pin: lcd.pins.bl, d_val: lcd_bits[LCD_PORT_D][LCD_BIT_BL], |
1010 | c_val: lcd_bits[LCD_PORT_C][LCD_BIT_BL]); |
1011 | pin_to_bits(pin: lcd.pins.cl, d_val: lcd_bits[LCD_PORT_D][LCD_BIT_CL], |
1012 | c_val: lcd_bits[LCD_PORT_C][LCD_BIT_CL]); |
1013 | pin_to_bits(pin: lcd.pins.da, d_val: lcd_bits[LCD_PORT_D][LCD_BIT_DA], |
1014 | c_val: lcd_bits[LCD_PORT_C][LCD_BIT_DA]); |
1015 | |
1016 | lcd.charlcd = charlcd; |
1017 | lcd.initialized = true; |
1018 | } |
1019 | |
1020 | /* |
1021 | * These are the file operation function for user access to /dev/keypad |
1022 | */ |
1023 | |
1024 | static ssize_t keypad_read(struct file *file, |
1025 | char __user *buf, size_t count, loff_t *ppos) |
1026 | { |
1027 | unsigned i = *ppos; |
1028 | char __user *tmp = buf; |
1029 | |
1030 | if (keypad_buflen == 0) { |
1031 | if (file->f_flags & O_NONBLOCK) |
1032 | return -EAGAIN; |
1033 | |
1034 | if (wait_event_interruptible(keypad_read_wait, |
1035 | keypad_buflen != 0)) |
1036 | return -EINTR; |
1037 | } |
1038 | |
1039 | for (; count-- > 0 && (keypad_buflen > 0); |
1040 | ++i, ++tmp, --keypad_buflen) { |
1041 | put_user(keypad_buffer[keypad_start], tmp); |
1042 | keypad_start = (keypad_start + 1) % KEYPAD_BUFFER; |
1043 | } |
1044 | *ppos = i; |
1045 | |
1046 | return tmp - buf; |
1047 | } |
1048 | |
1049 | static int keypad_open(struct inode *inode, struct file *file) |
1050 | { |
1051 | int ret; |
1052 | |
1053 | ret = -EBUSY; |
1054 | if (!atomic_dec_and_test(v: &keypad_available)) |
1055 | goto fail; /* open only once at a time */ |
1056 | |
1057 | ret = -EPERM; |
1058 | if (file->f_mode & FMODE_WRITE) /* device is read-only */ |
1059 | goto fail; |
1060 | |
1061 | keypad_buflen = 0; /* flush the buffer on opening */ |
1062 | return 0; |
1063 | fail: |
1064 | atomic_inc(v: &keypad_available); |
1065 | return ret; |
1066 | } |
1067 | |
1068 | static int keypad_release(struct inode *inode, struct file *file) |
1069 | { |
1070 | atomic_inc(v: &keypad_available); |
1071 | return 0; |
1072 | } |
1073 | |
1074 | static const struct file_operations keypad_fops = { |
1075 | .read = keypad_read, /* read */ |
1076 | .open = keypad_open, /* open */ |
1077 | .release = keypad_release, /* close */ |
1078 | .llseek = default_llseek, |
1079 | }; |
1080 | |
1081 | static struct miscdevice keypad_dev = { |
1082 | .minor = KEYPAD_MINOR, |
1083 | .name = "keypad" , |
1084 | .fops = &keypad_fops, |
1085 | }; |
1086 | |
1087 | static void keypad_send_key(const char *string, int max_len) |
1088 | { |
1089 | /* send the key to the device only if a process is attached to it. */ |
1090 | if (!atomic_read(v: &keypad_available)) { |
1091 | while (max_len-- && keypad_buflen < KEYPAD_BUFFER && *string) { |
1092 | keypad_buffer[(keypad_start + keypad_buflen++) % |
1093 | KEYPAD_BUFFER] = *string++; |
1094 | } |
1095 | wake_up_interruptible(&keypad_read_wait); |
1096 | } |
1097 | } |
1098 | |
1099 | /* this function scans all the bits involving at least one logical signal, |
1100 | * and puts the results in the bitfield "phys_read" (one bit per established |
1101 | * contact), and sets "phys_read_prev" to "phys_read". |
1102 | * |
1103 | * Note: to debounce input signals, we will only consider as switched a signal |
1104 | * which is stable across 2 measures. Signals which are different between two |
1105 | * reads will be kept as they previously were in their logical form (phys_prev). |
1106 | * A signal which has just switched will have a 1 in |
1107 | * (phys_read ^ phys_read_prev). |
1108 | */ |
1109 | static void phys_scan_contacts(void) |
1110 | { |
1111 | int bit, bitval; |
1112 | char oldval; |
1113 | char bitmask; |
1114 | char gndmask; |
1115 | |
1116 | phys_prev = phys_curr; |
1117 | phys_read_prev = phys_read; |
1118 | phys_read = 0; /* flush all signals */ |
1119 | |
1120 | /* keep track of old value, with all outputs disabled */ |
1121 | oldval = r_dtr(pprt) | scan_mask_o; |
1122 | /* activate all keyboard outputs (active low) */ |
1123 | w_dtr(pprt, oldval & ~scan_mask_o); |
1124 | |
1125 | /* will have a 1 for each bit set to gnd */ |
1126 | bitmask = PNL_PINPUT(r_str(pprt)) & scan_mask_i; |
1127 | /* disable all matrix signals */ |
1128 | w_dtr(pprt, oldval); |
1129 | |
1130 | /* now that all outputs are cleared, the only active input bits are |
1131 | * directly connected to the ground |
1132 | */ |
1133 | |
1134 | /* 1 for each grounded input */ |
1135 | gndmask = PNL_PINPUT(r_str(pprt)) & scan_mask_i; |
1136 | |
1137 | /* grounded inputs are signals 40-44 */ |
1138 | phys_read |= (__u64)gndmask << 40; |
1139 | |
1140 | if (bitmask != gndmask) { |
1141 | /* |
1142 | * since clearing the outputs changed some inputs, we know |
1143 | * that some input signals are currently tied to some outputs. |
1144 | * So we'll scan them. |
1145 | */ |
1146 | for (bit = 0; bit < 8; bit++) { |
1147 | bitval = BIT(bit); |
1148 | |
1149 | if (!(scan_mask_o & bitval)) /* skip unused bits */ |
1150 | continue; |
1151 | |
1152 | w_dtr(pprt, oldval & ~bitval); /* enable this output */ |
1153 | bitmask = PNL_PINPUT(r_str(pprt)) & ~gndmask; |
1154 | phys_read |= (__u64)bitmask << (5 * bit); |
1155 | } |
1156 | w_dtr(pprt, oldval); /* disable all outputs */ |
1157 | } |
1158 | /* |
1159 | * this is easy: use old bits when they are flapping, |
1160 | * use new ones when stable |
1161 | */ |
1162 | phys_curr = (phys_prev & (phys_read ^ phys_read_prev)) | |
1163 | (phys_read & ~(phys_read ^ phys_read_prev)); |
1164 | } |
1165 | |
1166 | static inline int input_state_high(struct logical_input *input) |
1167 | { |
1168 | #if 0 |
1169 | /* FIXME: |
1170 | * this is an invalid test. It tries to catch |
1171 | * transitions from single-key to multiple-key, but |
1172 | * doesn't take into account the contacts polarity. |
1173 | * The only solution to the problem is to parse keys |
1174 | * from the most complex to the simplest combinations, |
1175 | * and mark them as 'caught' once a combination |
1176 | * matches, then unmatch it for all other ones. |
1177 | */ |
1178 | |
1179 | /* try to catch dangerous transitions cases : |
1180 | * someone adds a bit, so this signal was a false |
1181 | * positive resulting from a transition. We should |
1182 | * invalidate the signal immediately and not call the |
1183 | * release function. |
1184 | * eg: 0 -(press A)-> A -(press B)-> AB : don't match A's release. |
1185 | */ |
1186 | if (((phys_prev & input->mask) == input->value) && |
1187 | ((phys_curr & input->mask) > input->value)) { |
1188 | input->state = INPUT_ST_LOW; /* invalidate */ |
1189 | return 1; |
1190 | } |
1191 | #endif |
1192 | |
1193 | if ((phys_curr & input->mask) == input->value) { |
1194 | if ((input->type == INPUT_TYPE_STD) && |
1195 | (input->high_timer == 0)) { |
1196 | input->high_timer++; |
1197 | if (input->u.std.press_fct) |
1198 | input->u.std.press_fct(input->u.std.press_data); |
1199 | } else if (input->type == INPUT_TYPE_KBD) { |
1200 | /* will turn on the light */ |
1201 | keypressed = 1; |
1202 | |
1203 | if (input->high_timer == 0) { |
1204 | char *press_str = input->u.kbd.press_str; |
1205 | |
1206 | if (press_str[0]) { |
1207 | int s = sizeof(input->u.kbd.press_str); |
1208 | |
1209 | keypad_send_key(string: press_str, max_len: s); |
1210 | } |
1211 | } |
1212 | |
1213 | if (input->u.kbd.repeat_str[0]) { |
1214 | char *repeat_str = input->u.kbd.repeat_str; |
1215 | |
1216 | if (input->high_timer >= KEYPAD_REP_START) { |
1217 | int s = sizeof(input->u.kbd.repeat_str); |
1218 | |
1219 | input->high_timer -= KEYPAD_REP_DELAY; |
1220 | keypad_send_key(string: repeat_str, max_len: s); |
1221 | } |
1222 | /* we will need to come back here soon */ |
1223 | inputs_stable = 0; |
1224 | } |
1225 | |
1226 | if (input->high_timer < 255) |
1227 | input->high_timer++; |
1228 | } |
1229 | return 1; |
1230 | } |
1231 | |
1232 | /* else signal falling down. Let's fall through. */ |
1233 | input->state = INPUT_ST_FALLING; |
1234 | input->fall_timer = 0; |
1235 | |
1236 | return 0; |
1237 | } |
1238 | |
1239 | static inline void input_state_falling(struct logical_input *input) |
1240 | { |
1241 | #if 0 |
1242 | /* FIXME !!! same comment as in input_state_high */ |
1243 | if (((phys_prev & input->mask) == input->value) && |
1244 | ((phys_curr & input->mask) > input->value)) { |
1245 | input->state = INPUT_ST_LOW; /* invalidate */ |
1246 | return; |
1247 | } |
1248 | #endif |
1249 | |
1250 | if ((phys_curr & input->mask) == input->value) { |
1251 | if (input->type == INPUT_TYPE_KBD) { |
1252 | /* will turn on the light */ |
1253 | keypressed = 1; |
1254 | |
1255 | if (input->u.kbd.repeat_str[0]) { |
1256 | char *repeat_str = input->u.kbd.repeat_str; |
1257 | |
1258 | if (input->high_timer >= KEYPAD_REP_START) { |
1259 | int s = sizeof(input->u.kbd.repeat_str); |
1260 | |
1261 | input->high_timer -= KEYPAD_REP_DELAY; |
1262 | keypad_send_key(string: repeat_str, max_len: s); |
1263 | } |
1264 | /* we will need to come back here soon */ |
1265 | inputs_stable = 0; |
1266 | } |
1267 | |
1268 | if (input->high_timer < 255) |
1269 | input->high_timer++; |
1270 | } |
1271 | input->state = INPUT_ST_HIGH; |
1272 | } else if (input->fall_timer >= input->fall_time) { |
1273 | /* call release event */ |
1274 | if (input->type == INPUT_TYPE_STD) { |
1275 | void (*release_fct)(int) = input->u.std.release_fct; |
1276 | |
1277 | if (release_fct) |
1278 | release_fct(input->u.std.release_data); |
1279 | } else if (input->type == INPUT_TYPE_KBD) { |
1280 | char *release_str = input->u.kbd.release_str; |
1281 | |
1282 | if (release_str[0]) { |
1283 | int s = sizeof(input->u.kbd.release_str); |
1284 | |
1285 | keypad_send_key(string: release_str, max_len: s); |
1286 | } |
1287 | } |
1288 | |
1289 | input->state = INPUT_ST_LOW; |
1290 | } else { |
1291 | input->fall_timer++; |
1292 | inputs_stable = 0; |
1293 | } |
1294 | } |
1295 | |
1296 | static void panel_process_inputs(void) |
1297 | { |
1298 | struct logical_input *input; |
1299 | |
1300 | keypressed = 0; |
1301 | inputs_stable = 1; |
1302 | list_for_each_entry(input, &logical_inputs, list) { |
1303 | switch (input->state) { |
1304 | case INPUT_ST_LOW: |
1305 | if ((phys_curr & input->mask) != input->value) |
1306 | break; |
1307 | /* if all needed ones were already set previously, |
1308 | * this means that this logical signal has been |
1309 | * activated by the releasing of another combined |
1310 | * signal, so we don't want to match. |
1311 | * eg: AB -(release B)-> A -(release A)-> 0 : |
1312 | * don't match A. |
1313 | */ |
1314 | if ((phys_prev & input->mask) == input->value) |
1315 | break; |
1316 | input->rise_timer = 0; |
1317 | input->state = INPUT_ST_RISING; |
1318 | fallthrough; |
1319 | case INPUT_ST_RISING: |
1320 | if ((phys_curr & input->mask) != input->value) { |
1321 | input->state = INPUT_ST_LOW; |
1322 | break; |
1323 | } |
1324 | if (input->rise_timer < input->rise_time) { |
1325 | inputs_stable = 0; |
1326 | input->rise_timer++; |
1327 | break; |
1328 | } |
1329 | input->high_timer = 0; |
1330 | input->state = INPUT_ST_HIGH; |
1331 | fallthrough; |
1332 | case INPUT_ST_HIGH: |
1333 | if (input_state_high(input)) |
1334 | break; |
1335 | fallthrough; |
1336 | case INPUT_ST_FALLING: |
1337 | input_state_falling(input); |
1338 | } |
1339 | } |
1340 | } |
1341 | |
1342 | static void panel_scan_timer(struct timer_list *unused) |
1343 | { |
1344 | if (keypad.enabled && keypad_initialized) { |
1345 | if (spin_trylock_irq(lock: &pprt_lock)) { |
1346 | phys_scan_contacts(); |
1347 | |
1348 | /* no need for the parport anymore */ |
1349 | spin_unlock_irq(lock: &pprt_lock); |
1350 | } |
1351 | |
1352 | if (!inputs_stable || phys_curr != phys_prev) |
1353 | panel_process_inputs(); |
1354 | } |
1355 | |
1356 | if (keypressed && lcd.enabled && lcd.initialized) |
1357 | charlcd_poke(lcd: lcd.charlcd); |
1358 | |
1359 | mod_timer(timer: &scan_timer, expires: jiffies + INPUT_POLL_TIME); |
1360 | } |
1361 | |
1362 | static void init_scan_timer(void) |
1363 | { |
1364 | if (scan_timer.function) |
1365 | return; /* already started */ |
1366 | |
1367 | timer_setup(&scan_timer, panel_scan_timer, 0); |
1368 | scan_timer.expires = jiffies + INPUT_POLL_TIME; |
1369 | add_timer(timer: &scan_timer); |
1370 | } |
1371 | |
1372 | /* converts a name of the form "({BbAaPpSsEe}{01234567-})*" to a series of bits. |
1373 | * if <omask> or <imask> are non-null, they will be or'ed with the bits |
1374 | * corresponding to out and in bits respectively. |
1375 | * returns 1 if ok, 0 if error (in which case, nothing is written). |
1376 | */ |
1377 | static u8 input_name2mask(const char *name, __u64 *mask, __u64 *value, |
1378 | u8 *imask, u8 *omask) |
1379 | { |
1380 | const char sigtab[] = "EeSsPpAaBb" ; |
1381 | u8 im, om; |
1382 | __u64 m, v; |
1383 | |
1384 | om = 0; |
1385 | im = 0; |
1386 | m = 0ULL; |
1387 | v = 0ULL; |
1388 | while (*name) { |
1389 | int in, out, bit, neg; |
1390 | const char *idx; |
1391 | |
1392 | idx = strchr(sigtab, *name); |
1393 | if (!idx) |
1394 | return 0; /* input name not found */ |
1395 | |
1396 | in = idx - sigtab; |
1397 | neg = (in & 1); /* odd (lower) names are negated */ |
1398 | in >>= 1; |
1399 | im |= BIT(in); |
1400 | |
1401 | name++; |
1402 | if (*name >= '0' && *name <= '7') { |
1403 | out = *name - '0'; |
1404 | om |= BIT(out); |
1405 | } else if (*name == '-') { |
1406 | out = 8; |
1407 | } else { |
1408 | return 0; /* unknown bit name */ |
1409 | } |
1410 | |
1411 | bit = (out * 5) + in; |
1412 | |
1413 | m |= 1ULL << bit; |
1414 | if (!neg) |
1415 | v |= 1ULL << bit; |
1416 | name++; |
1417 | } |
1418 | *mask = m; |
1419 | *value = v; |
1420 | if (imask) |
1421 | *imask |= im; |
1422 | if (omask) |
1423 | *omask |= om; |
1424 | return 1; |
1425 | } |
1426 | |
1427 | /* tries to bind a key to the signal name <name>. The key will send the |
1428 | * strings <press>, <repeat>, <release> for these respective events. |
1429 | * Returns the pointer to the new key if ok, NULL if the key could not be bound. |
1430 | */ |
1431 | static struct logical_input *panel_bind_key(const char *name, const char *press, |
1432 | const char *repeat, |
1433 | const char *release) |
1434 | { |
1435 | struct logical_input *key; |
1436 | |
1437 | key = kzalloc(size: sizeof(*key), GFP_KERNEL); |
1438 | if (!key) |
1439 | return NULL; |
1440 | |
1441 | if (!input_name2mask(name, mask: &key->mask, value: &key->value, imask: &scan_mask_i, |
1442 | omask: &scan_mask_o)) { |
1443 | kfree(objp: key); |
1444 | return NULL; |
1445 | } |
1446 | |
1447 | key->type = INPUT_TYPE_KBD; |
1448 | key->state = INPUT_ST_LOW; |
1449 | key->rise_time = 1; |
1450 | key->fall_time = 1; |
1451 | |
1452 | strtomem_pad(key->u.kbd.press_str, press, '\0'); |
1453 | strtomem_pad(key->u.kbd.repeat_str, repeat, '\0'); |
1454 | strtomem_pad(key->u.kbd.release_str, release, '\0'); |
1455 | list_add(new: &key->list, head: &logical_inputs); |
1456 | return key; |
1457 | } |
1458 | |
1459 | #if 0 |
1460 | /* tries to bind a callback function to the signal name <name>. The function |
1461 | * <press_fct> will be called with the <press_data> arg when the signal is |
1462 | * activated, and so on for <release_fct>/<release_data> |
1463 | * Returns the pointer to the new signal if ok, NULL if the signal could not |
1464 | * be bound. |
1465 | */ |
1466 | static struct logical_input *panel_bind_callback(char *name, |
1467 | void (*press_fct)(int), |
1468 | int press_data, |
1469 | void (*release_fct)(int), |
1470 | int release_data) |
1471 | { |
1472 | struct logical_input *callback; |
1473 | |
1474 | callback = kmalloc(sizeof(*callback), GFP_KERNEL); |
1475 | if (!callback) |
1476 | return NULL; |
1477 | |
1478 | memset(callback, 0, sizeof(struct logical_input)); |
1479 | if (!input_name2mask(name, &callback->mask, &callback->value, |
1480 | &scan_mask_i, &scan_mask_o)) |
1481 | return NULL; |
1482 | |
1483 | callback->type = INPUT_TYPE_STD; |
1484 | callback->state = INPUT_ST_LOW; |
1485 | callback->rise_time = 1; |
1486 | callback->fall_time = 1; |
1487 | callback->u.std.press_fct = press_fct; |
1488 | callback->u.std.press_data = press_data; |
1489 | callback->u.std.release_fct = release_fct; |
1490 | callback->u.std.release_data = release_data; |
1491 | list_add(&callback->list, &logical_inputs); |
1492 | return callback; |
1493 | } |
1494 | #endif |
1495 | |
1496 | static void keypad_init(void) |
1497 | { |
1498 | int keynum; |
1499 | |
1500 | init_waitqueue_head(&keypad_read_wait); |
1501 | keypad_buflen = 0; /* flushes any eventual noisy keystroke */ |
1502 | |
1503 | /* Let's create all known keys */ |
1504 | |
1505 | for (keynum = 0; keypad_profile[keynum][0][0]; keynum++) { |
1506 | panel_bind_key(name: keypad_profile[keynum][0], |
1507 | press: keypad_profile[keynum][1], |
1508 | repeat: keypad_profile[keynum][2], |
1509 | release: keypad_profile[keynum][3]); |
1510 | } |
1511 | |
1512 | init_scan_timer(); |
1513 | keypad_initialized = 1; |
1514 | } |
1515 | |
1516 | /**************************************************/ |
1517 | /* device initialization */ |
1518 | /**************************************************/ |
1519 | |
1520 | static void panel_attach(struct parport *port) |
1521 | { |
1522 | int selected_keypad_type = NOT_SET; |
1523 | struct pardev_cb panel_cb; |
1524 | |
1525 | /* take care of an eventual profile */ |
1526 | switch (profile) { |
1527 | case PANEL_PROFILE_CUSTOM: |
1528 | /* custom profile */ |
1529 | selected_keypad_type = DEFAULT_KEYPAD_TYPE; |
1530 | selected_lcd_type = DEFAULT_LCD_TYPE; |
1531 | break; |
1532 | case PANEL_PROFILE_OLD: |
1533 | /* 8 bits, 2*16, old keypad */ |
1534 | selected_keypad_type = KEYPAD_TYPE_OLD; |
1535 | selected_lcd_type = LCD_TYPE_OLD; |
1536 | |
1537 | /* TODO: This two are a little hacky, sort it out later */ |
1538 | if (lcd_width == NOT_SET) |
1539 | lcd_width = 16; |
1540 | if (lcd_hwidth == NOT_SET) |
1541 | lcd_hwidth = 16; |
1542 | break; |
1543 | case PANEL_PROFILE_NEW: |
1544 | /* serial, 2*16, new keypad */ |
1545 | selected_keypad_type = KEYPAD_TYPE_NEW; |
1546 | selected_lcd_type = LCD_TYPE_KS0074; |
1547 | break; |
1548 | case PANEL_PROFILE_HANTRONIX: |
1549 | /* 8 bits, 2*16 hantronix-like, no keypad */ |
1550 | selected_keypad_type = KEYPAD_TYPE_NONE; |
1551 | selected_lcd_type = LCD_TYPE_HANTRONIX; |
1552 | break; |
1553 | case PANEL_PROFILE_NEXCOM: |
1554 | /* generic 8 bits, 2*16, nexcom keypad, eg. Nexcom. */ |
1555 | selected_keypad_type = KEYPAD_TYPE_NEXCOM; |
1556 | selected_lcd_type = LCD_TYPE_NEXCOM; |
1557 | break; |
1558 | case PANEL_PROFILE_LARGE: |
1559 | /* 8 bits, 2*40, old keypad */ |
1560 | selected_keypad_type = KEYPAD_TYPE_OLD; |
1561 | selected_lcd_type = LCD_TYPE_OLD; |
1562 | break; |
1563 | } |
1564 | |
1565 | /* |
1566 | * Overwrite selection with module param values (both keypad and lcd), |
1567 | * where the deprecated params have lower prio. |
1568 | */ |
1569 | if (keypad_enabled != NOT_SET) |
1570 | selected_keypad_type = keypad_enabled; |
1571 | if (keypad_type != NOT_SET) |
1572 | selected_keypad_type = keypad_type; |
1573 | |
1574 | keypad.enabled = (selected_keypad_type > 0); |
1575 | |
1576 | if (lcd_enabled != NOT_SET) |
1577 | selected_lcd_type = lcd_enabled; |
1578 | if (lcd_type != NOT_SET) |
1579 | selected_lcd_type = lcd_type; |
1580 | |
1581 | lcd.enabled = (selected_lcd_type > 0); |
1582 | |
1583 | if (lcd.enabled) { |
1584 | /* |
1585 | * Init lcd struct with load-time values to preserve exact |
1586 | * current functionality (at least for now). |
1587 | */ |
1588 | lcd.charset = lcd_charset; |
1589 | lcd.proto = lcd_proto; |
1590 | lcd.pins.e = lcd_e_pin; |
1591 | lcd.pins.rs = lcd_rs_pin; |
1592 | lcd.pins.rw = lcd_rw_pin; |
1593 | lcd.pins.cl = lcd_cl_pin; |
1594 | lcd.pins.da = lcd_da_pin; |
1595 | lcd.pins.bl = lcd_bl_pin; |
1596 | } |
1597 | |
1598 | switch (selected_keypad_type) { |
1599 | case KEYPAD_TYPE_OLD: |
1600 | keypad_profile = old_keypad_profile; |
1601 | break; |
1602 | case KEYPAD_TYPE_NEW: |
1603 | keypad_profile = new_keypad_profile; |
1604 | break; |
1605 | case KEYPAD_TYPE_NEXCOM: |
1606 | keypad_profile = nexcom_keypad_profile; |
1607 | break; |
1608 | default: |
1609 | keypad_profile = NULL; |
1610 | break; |
1611 | } |
1612 | |
1613 | if (!lcd.enabled && !keypad.enabled) { |
1614 | /* no device enabled, let's exit */ |
1615 | pr_err("panel driver disabled.\n" ); |
1616 | return; |
1617 | } |
1618 | |
1619 | if (port->number != parport) |
1620 | return; |
1621 | |
1622 | if (pprt) { |
1623 | pr_err("%s: port->number=%d parport=%d, already registered!\n" , |
1624 | __func__, port->number, parport); |
1625 | return; |
1626 | } |
1627 | |
1628 | memset(&panel_cb, 0, sizeof(panel_cb)); |
1629 | panel_cb.private = &pprt; |
1630 | /* panel_cb.flags = 0 should be PARPORT_DEV_EXCL? */ |
1631 | |
1632 | pprt = parport_register_dev_model(port, name: "panel" , par_dev_cb: &panel_cb, cnt: 0); |
1633 | if (!pprt) { |
1634 | pr_err("%s: port->number=%d parport=%d, parport_register_device() failed\n" , |
1635 | __func__, port->number, parport); |
1636 | return; |
1637 | } |
1638 | |
1639 | if (parport_claim(dev: pprt)) { |
1640 | pr_err("could not claim access to parport%d. Aborting.\n" , |
1641 | parport); |
1642 | goto err_unreg_device; |
1643 | } |
1644 | |
1645 | /* must init LCD first, just in case an IRQ from the keypad is |
1646 | * generated at keypad init |
1647 | */ |
1648 | if (lcd.enabled) { |
1649 | lcd_init(); |
1650 | if (!lcd.charlcd || charlcd_register(lcd: lcd.charlcd)) |
1651 | goto err_unreg_device; |
1652 | } |
1653 | |
1654 | if (keypad.enabled) { |
1655 | keypad_init(); |
1656 | if (misc_register(misc: &keypad_dev)) |
1657 | goto err_lcd_unreg; |
1658 | } |
1659 | return; |
1660 | |
1661 | err_lcd_unreg: |
1662 | if (scan_timer.function) |
1663 | del_timer_sync(timer: &scan_timer); |
1664 | if (lcd.enabled) |
1665 | charlcd_unregister(lcd: lcd.charlcd); |
1666 | err_unreg_device: |
1667 | kfree(objp: lcd.charlcd); |
1668 | lcd.charlcd = NULL; |
1669 | parport_unregister_device(dev: pprt); |
1670 | pprt = NULL; |
1671 | } |
1672 | |
1673 | static void panel_detach(struct parport *port) |
1674 | { |
1675 | if (port->number != parport) |
1676 | return; |
1677 | |
1678 | if (!pprt) { |
1679 | pr_err("%s: port->number=%d parport=%d, nothing to unregister.\n" , |
1680 | __func__, port->number, parport); |
1681 | return; |
1682 | } |
1683 | if (scan_timer.function) |
1684 | del_timer_sync(timer: &scan_timer); |
1685 | |
1686 | if (keypad.enabled) { |
1687 | misc_deregister(misc: &keypad_dev); |
1688 | keypad_initialized = 0; |
1689 | } |
1690 | |
1691 | if (lcd.enabled) { |
1692 | charlcd_unregister(lcd: lcd.charlcd); |
1693 | lcd.initialized = false; |
1694 | kfree(objp: lcd.charlcd->drvdata); |
1695 | kfree(objp: lcd.charlcd); |
1696 | lcd.charlcd = NULL; |
1697 | } |
1698 | |
1699 | /* TODO: free all input signals */ |
1700 | parport_release(dev: pprt); |
1701 | parport_unregister_device(dev: pprt); |
1702 | pprt = NULL; |
1703 | } |
1704 | |
1705 | static struct parport_driver panel_driver = { |
1706 | .name = "panel" , |
1707 | .match_port = panel_attach, |
1708 | .detach = panel_detach, |
1709 | .devmodel = true, |
1710 | }; |
1711 | module_parport_driver(panel_driver); |
1712 | |
1713 | MODULE_AUTHOR("Willy Tarreau" ); |
1714 | MODULE_LICENSE("GPL" ); |
1715 | |