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351f683b | 1 | // SPDX-License-Identifier: GPL-2.0+ |
7005b584 | 2 | /* |
698b1515 WT |
3 | * Front panel driver for Linux |
4 | * Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu> | |
39f8ea46 | 5 | * Copyright (C) 2016-2017 Glider bvba |
7005b584 | 6 | * |
698b1515 WT |
7 | * This code drives an LCD module (/dev/lcd), and a keypad (/dev/keypad) |
8 | * connected to a parallel printer port. | |
7005b584 | 9 | * |
698b1515 WT |
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. | |
7005b584 | 13 | * |
698b1515 WT |
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. | |
7005b584 | 17 | * |
698b1515 WT |
18 | * Several profiles are provided for commonly found LCD+keypad modules on the |
19 | * market, such as those found in Nexcom's appliances. | |
7005b584 WT |
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 | ||
493aa896 TY |
34 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
35 | ||
7005b584 WT |
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> | |
7005b584 WT |
43 | #include <linux/interrupt.h> |
44 | #include <linux/miscdevice.h> | |
698b1515 | 45 | #include <linux/slab.h> |
7005b584 WT |
46 | #include <linux/ioport.h> |
47 | #include <linux/fcntl.h> | |
48 | #include <linux/init.h> | |
49 | #include <linux/delay.h> | |
d85170ed | 50 | #include <linux/kernel.h> |
7005b584 WT |
51 | #include <linux/ctype.h> |
52 | #include <linux/parport.h> | |
7005b584 | 53 | #include <linux/list.h> |
7005b584 | 54 | |
698b1515 | 55 | #include <linux/io.h> |
48f658bb | 56 | #include <linux/uaccess.h> |
7005b584 | 57 | |
75354284 | 58 | #include "charlcd.h" |
718e05ed | 59 | #include "hd44780_common.h" |
39f8ea46 | 60 | |
7005b584 WT |
61 | #define LCD_MAXBYTES 256 /* max burst write */ |
62 | ||
7005b584 | 63 | #define KEYPAD_BUFFER 64 |
7005b584 | 64 | |
429ccf05 | 65 | /* poll the keyboard this every second */ |
2b3c9eb2 | 66 | #define INPUT_POLL_TIME (HZ / 50) |
429ccf05 HH |
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 | ||
7005b584 WT |
72 | /* converts an r_str() input to an active high, bits string : 000BAOSE */ |
73 | #define PNL_PINPUT(a) ((((unsigned char)(a)) ^ 0x7F) >> 3) | |
74 | ||
698b1515 WT |
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 */ | |
7005b584 | 80 | |
698b1515 | 81 | #define PNL_PBIDIR 0x20 /* bi-directional ports */ |
429ccf05 HH |
82 | /* high to read data in or-ed with data out */ |
83 | #define PNL_PINTEN 0x10 | |
698b1515 WT |
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 */ | |
7005b584 WT |
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 | ||
36277d4a MG |
113 | #define NOT_SET -1 |
114 | ||
7005b584 WT |
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)) | |
6ebb56d9 TY |
119 | #define w_ctr(x, y) (parport_write_control((x)->port, (y))) |
120 | #define w_dtr(x, y) (parport_write_data((x)->port, (y))) | |
7005b584 WT |
121 | |
122 | /* this defines which bits are to be used and which ones to be ignored */ | |
429ccf05 HH |
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; | |
7005b584 | 127 | |
7005b584 | 128 | enum input_type { |
698b1515 WT |
129 | INPUT_TYPE_STD, |
130 | INPUT_TYPE_KBD, | |
7005b584 WT |
131 | }; |
132 | ||
133 | enum input_state { | |
698b1515 WT |
134 | INPUT_ST_LOW, |
135 | INPUT_ST_RISING, | |
136 | INPUT_ST_HIGH, | |
137 | INPUT_ST_FALLING, | |
7005b584 WT |
138 | }; |
139 | ||
140 | struct logical_input { | |
698b1515 | 141 | struct list_head list; |
35fe0872 KS |
142 | __u64 mask; |
143 | __u64 value; | |
698b1515 WT |
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 { | |
429ccf05 | 150 | struct { /* valid when type == INPUT_TYPE_STD */ |
68d386bf MA |
151 | void (*press_fct)(int); |
152 | void (*release_fct)(int); | |
698b1515 WT |
153 | int press_data; |
154 | int release_data; | |
155 | } std; | |
429ccf05 | 156 | struct { /* valid when type == INPUT_TYPE_KBD */ |
98cade0a MO |
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; | |
698b1515 WT |
160 | } kbd; |
161 | } u; | |
7005b584 WT |
162 | }; |
163 | ||
36d2041a | 164 | static LIST_HEAD(logical_inputs); /* list of all defined logical inputs */ |
7005b584 WT |
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). | |
35fe0872 | 172 | * So, each __u64 is represented like this : |
7005b584 WT |
173 | * 0000000000000000000BAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSE |
174 | * <-----unused------><gnd><d07><d06><d05><d04><d03><d02><d01><d00> | |
175 | */ | |
429ccf05 HH |
176 | |
177 | /* what has just been read from the I/O ports */ | |
35fe0872 | 178 | static __u64 phys_read; |
429ccf05 | 179 | /* previous phys_read */ |
35fe0872 | 180 | static __u64 phys_read_prev; |
429ccf05 | 181 | /* stabilized phys_read (phys_read|phys_read_prev) */ |
35fe0872 | 182 | static __u64 phys_curr; |
429ccf05 | 183 | /* previous phys_curr */ |
35fe0872 | 184 | static __u64 phys_prev; |
429ccf05 HH |
185 | /* 0 means that at least one logical signal needs be computed */ |
186 | static char inputs_stable; | |
7005b584 | 187 | |
7005b584 | 188 | /* these variables are specific to the keypad */ |
a8b2580b MG |
189 | static struct { |
190 | bool enabled; | |
191 | } keypad; | |
192 | ||
7005b584 | 193 | static char keypad_buffer[KEYPAD_BUFFER]; |
698b1515 WT |
194 | static int keypad_buflen; |
195 | static int keypad_start; | |
196 | static char keypressed; | |
7005b584 | 197 | static wait_queue_head_t keypad_read_wait; |
7005b584 WT |
198 | |
199 | /* lcd-specific variables */ | |
a8b2580b MG |
200 | static struct { |
201 | bool enabled; | |
6d8b588c | 202 | bool initialized; |
6d8b588c | 203 | |
8037e2a3 MG |
204 | int charset; |
205 | int proto; | |
fda4ae18 | 206 | |
8037e2a3 MG |
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; | |
6d8b588c | 216 | |
39f8ea46 | 217 | struct charlcd *charlcd; |
a8b2580b | 218 | } lcd; |
429ccf05 | 219 | |
87b8e0c8 MG |
220 | /* Needed only for init */ |
221 | static int selected_lcd_type = NOT_SET; | |
222 | ||
7005b584 WT |
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 | */ | |
698b1515 WT |
228 | #define BIT_CLR 0 |
229 | #define BIT_SET 1 | |
230 | #define BIT_MSK 2 | |
7005b584 WT |
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 | |
77943d31 | 257 | #define LCD_PROTO_TI_DA8XX_LCD 2 |
7005b584 WT |
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 | |
2c20d92d SM |
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 | |
7005b584 WT |
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 | */ | |
7005b584 | 296 | #define DEFAULT_PARPORT 0 |
fe4d7e2c | 297 | #define DEFAULT_PROFILE PANEL_PROFILE_LARGE |
98fac3d3 MG |
298 | #define DEFAULT_KEYPAD_TYPE KEYPAD_TYPE_OLD |
299 | #define DEFAULT_LCD_TYPE LCD_TYPE_OLD | |
fe4d7e2c | 300 | #define DEFAULT_LCD_HEIGHT 2 |
7005b584 | 301 | #define DEFAULT_LCD_WIDTH 40 |
fe4d7e2c | 302 | #define DEFAULT_LCD_CHARSET LCD_CHARSET_NORMAL |
7005b584 WT |
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 | |
7005b584 | 311 | |
7005b584 WT |
312 | #ifdef CONFIG_PANEL_PARPORT |
313 | #undef DEFAULT_PARPORT | |
314 | #define DEFAULT_PARPORT CONFIG_PANEL_PARPORT | |
315 | #endif | |
316 | ||
1e13e8aa MG |
317 | #ifdef CONFIG_PANEL_PROFILE |
318 | #undef DEFAULT_PROFILE | |
319 | #define DEFAULT_PROFILE CONFIG_PANEL_PROFILE | |
320 | #endif | |
321 | ||
698b1515 | 322 | #if DEFAULT_PROFILE == 0 /* custom */ |
7005b584 | 323 | #ifdef CONFIG_PANEL_KEYPAD |
98fac3d3 MG |
324 | #undef DEFAULT_KEYPAD_TYPE |
325 | #define DEFAULT_KEYPAD_TYPE CONFIG_PANEL_KEYPAD | |
7005b584 WT |
326 | #endif |
327 | ||
7005b584 | 328 | #ifdef CONFIG_PANEL_LCD |
98fac3d3 MG |
329 | #undef DEFAULT_LCD_TYPE |
330 | #define DEFAULT_LCD_TYPE CONFIG_PANEL_LCD | |
7005b584 WT |
331 | #endif |
332 | ||
1e13e8aa MG |
333 | #ifdef CONFIG_PANEL_LCD_HEIGHT |
334 | #undef DEFAULT_LCD_HEIGHT | |
335 | #define DEFAULT_LCD_HEIGHT CONFIG_PANEL_LCD_HEIGHT | |
336 | #endif | |
337 | ||
7005b584 WT |
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 | ||
1e13e8aa MG |
353 | #ifdef CONFIG_PANEL_LCD_CHARSET |
354 | #undef DEFAULT_LCD_CHARSET | |
355 | #define DEFAULT_LCD_CHARSET CONFIG_PANEL_LCD_CHARSET | |
7005b584 WT |
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 | ||
7005b584 WT |
393 | #endif /* DEFAULT_PROFILE == 0 */ |
394 | ||
395 | /* global variables */ | |
f4757af8 MG |
396 | |
397 | /* Device single-open policy control */ | |
f4757af8 MG |
398 | static atomic_t keypad_available = ATOMIC_INIT(1); |
399 | ||
698b1515 | 400 | static struct pardevice *pprt; |
7005b584 | 401 | |
f6d1fcfe | 402 | static int keypad_initialized; |
7005b584 | 403 | |
698b1515 | 404 | static DEFINE_SPINLOCK(pprt_lock); |
7005b584 WT |
405 | static struct timer_list scan_timer; |
406 | ||
63023177 | 407 | MODULE_DESCRIPTION("Generic parallel port LCD/Keypad driver"); |
f6d1fcfe | 408 | |
59a66a24 | 409 | static int parport = DEFAULT_PARPORT; |
698b1515 WT |
410 | module_param(parport, int, 0000); |
411 | MODULE_PARM_DESC(parport, "Parallel port index (0=lpt1, 1=lpt2, ...)"); | |
f6d1fcfe | 412 | |
98e0e762 MG |
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 | ||
36277d4a | 419 | static int keypad_type = NOT_SET; |
98e0e762 MG |
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 | ||
36277d4a | 424 | static int lcd_type = NOT_SET; |
98e0e762 MG |
425 | module_param(lcd_type, int, 0000); |
426 | MODULE_PARM_DESC(lcd_type, | |
2c20d92d | 427 | "LCD type: 0=none, 1=compiled-in, 2=old, 3=serial ks0074, 4=hantronix, 5=nexcom"); |
98e0e762 | 428 | |
36277d4a | 429 | static int lcd_height = NOT_SET; |
698b1515 WT |
430 | module_param(lcd_height, int, 0000); |
431 | MODULE_PARM_DESC(lcd_height, "Number of lines on the LCD"); | |
f6d1fcfe | 432 | |
36277d4a | 433 | static int lcd_width = NOT_SET; |
698b1515 WT |
434 | module_param(lcd_width, int, 0000); |
435 | MODULE_PARM_DESC(lcd_width, "Number of columns on the LCD"); | |
f6d1fcfe | 436 | |
36277d4a | 437 | static int lcd_bwidth = NOT_SET; /* internal buffer width (usually 40) */ |
698b1515 WT |
438 | module_param(lcd_bwidth, int, 0000); |
439 | MODULE_PARM_DESC(lcd_bwidth, "Internal LCD line width (40)"); | |
f6d1fcfe | 440 | |
36277d4a | 441 | static int lcd_hwidth = NOT_SET; /* hardware buffer width (usually 64) */ |
698b1515 WT |
442 | module_param(lcd_hwidth, int, 0000); |
443 | MODULE_PARM_DESC(lcd_hwidth, "LCD line hardware address (64)"); | |
f6d1fcfe | 444 | |
36277d4a | 445 | static int lcd_charset = NOT_SET; |
98e0e762 MG |
446 | module_param(lcd_charset, int, 0000); |
447 | MODULE_PARM_DESC(lcd_charset, "LCD character set: 0=standard, 1=KS0074"); | |
f6d1fcfe | 448 | |
36277d4a | 449 | static int lcd_proto = NOT_SET; |
698b1515 | 450 | module_param(lcd_proto, int, 0000); |
429ccf05 | 451 | MODULE_PARM_DESC(lcd_proto, |
fdf4a494 | 452 | "LCD communication: 0=parallel (//), 1=serial, 2=TI LCD Interface"); |
f6d1fcfe | 453 | |
f6d1fcfe WT |
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 | * | |
63023177 | 460 | * WARNING! no check will be performed about collisions with keypad ! |
f6d1fcfe WT |
461 | */ |
462 | ||
463 | static int lcd_e_pin = PIN_NOT_SET; | |
698b1515 WT |
464 | module_param(lcd_e_pin, int, 0000); |
465 | MODULE_PARM_DESC(lcd_e_pin, | |
fe5d2e01 | 466 | "# of the // port pin connected to LCD 'E' signal, with polarity (-17..17)"); |
f6d1fcfe WT |
467 | |
468 | static int lcd_rs_pin = PIN_NOT_SET; | |
698b1515 WT |
469 | module_param(lcd_rs_pin, int, 0000); |
470 | MODULE_PARM_DESC(lcd_rs_pin, | |
fe5d2e01 | 471 | "# of the // port pin connected to LCD 'RS' signal, with polarity (-17..17)"); |
f6d1fcfe WT |
472 | |
473 | static int lcd_rw_pin = PIN_NOT_SET; | |
698b1515 WT |
474 | module_param(lcd_rw_pin, int, 0000); |
475 | MODULE_PARM_DESC(lcd_rw_pin, | |
fe5d2e01 | 476 | "# of the // port pin connected to LCD 'RW' signal, with polarity (-17..17)"); |
f6d1fcfe | 477 | |
98e0e762 MG |
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)"); | |
f6d1fcfe WT |
482 | |
483 | static int lcd_da_pin = PIN_NOT_SET; | |
698b1515 WT |
484 | module_param(lcd_da_pin, int, 0000); |
485 | MODULE_PARM_DESC(lcd_da_pin, | |
fe5d2e01 | 486 | "# of the // port pin connected to serial LCD 'SDA' signal, with polarity (-17..17)"); |
f6d1fcfe | 487 | |
98e0e762 MG |
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 | ||
36277d4a | 495 | static int lcd_enabled = NOT_SET; |
98e0e762 MG |
496 | module_param(lcd_enabled, int, 0000); |
497 | MODULE_PARM_DESC(lcd_enabled, "Deprecated option, use lcd_type instead"); | |
498 | ||
36277d4a | 499 | static int keypad_enabled = NOT_SET; |
98e0e762 MG |
500 | module_param(keypad_enabled, int, 0000); |
501 | MODULE_PARM_DESC(keypad_enabled, "Deprecated option, use keypad_type instead"); | |
502 | ||
7005b584 | 503 | /* for some LCD drivers (ks0074) we need a charset conversion table. */ |
36d2041a | 504 | static const unsigned char lcd_char_conv_ks0074[256] = { |
698b1515 WT |
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, | |
7005b584 WT |
538 | }; |
539 | ||
36d2041a | 540 | static const char old_keypad_profile[][4][9] = { |
698b1515 WT |
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 | {"", "", "", ""} | |
7005b584 WT |
548 | }; |
549 | ||
550 | /* signals, press, repeat, release */ | |
36d2041a | 551 | static const char new_keypad_profile[][4][9] = { |
698b1515 WT |
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 | {"", "", "", ""} | |
7005b584 WT |
561 | }; |
562 | ||
563 | /* signals, press, repeat, release */ | |
36d2041a | 564 | static const char nexcom_keypad_profile[][4][9] = { |
698b1515 WT |
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 | {"", "", "", ""} | |
7005b584 WT |
571 | }; |
572 | ||
36d2041a | 573 | static const char (*keypad_profile)[4][9] = old_keypad_profile; |
7005b584 | 574 | |
bea7433b DC |
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 | } | |
7005b584 | 587 | |
7005b584 | 588 | /* sets data port bits according to current signals values */ |
698b1515 WT |
589 | static int set_data_bits(void) |
590 | { | |
bea7433b | 591 | int val; |
698b1515 WT |
592 | |
593 | val = r_dtr(pprt); | |
bea7433b | 594 | lcd_get_bits(LCD_PORT_D, &val); |
698b1515 WT |
595 | w_dtr(pprt, val); |
596 | return val; | |
7005b584 WT |
597 | } |
598 | ||
599 | /* sets ctrl port bits according to current signals values */ | |
698b1515 WT |
600 | static int set_ctrl_bits(void) |
601 | { | |
bea7433b | 602 | int val; |
698b1515 WT |
603 | |
604 | val = r_ctr(pprt); | |
bea7433b | 605 | lcd_get_bits(LCD_PORT_C, &val); |
698b1515 WT |
606 | w_ctr(pprt, val); |
607 | return val; | |
7005b584 WT |
608 | } |
609 | ||
610 | /* sets ctrl & data port bits according to current signals values */ | |
6136ac86 | 611 | static void panel_set_bits(void) |
698b1515 WT |
612 | { |
613 | set_data_bits(); | |
614 | set_ctrl_bits(); | |
7005b584 WT |
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 | */ | |
36d2041a | 626 | static void pin_to_bits(int pin, unsigned char *d_val, unsigned char *c_val) |
698b1515 WT |
627 | { |
628 | int d_bit, c_bit, inv; | |
629 | ||
2d53426b DB |
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; | |
698b1515 WT |
636 | |
637 | if (pin == 0) | |
638 | return; | |
639 | ||
640 | inv = (pin < 0); | |
641 | if (inv) | |
642 | pin = -pin; | |
643 | ||
2d53426b DB |
644 | d_bit = 0; |
645 | c_bit = 0; | |
698b1515 WT |
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; | |
429ccf05 | 659 | case PIN_INITP: /* init, direct */ |
698b1515 WT |
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 | } | |
7005b584 WT |
677 | } |
678 | ||
881bf281 AW |
679 | /* |
680 | * send a serial byte to the LCD panel. The caller is responsible for locking | |
681 | * if needed. | |
682 | */ | |
698b1515 WT |
683 | static void lcd_send_serial(int byte) |
684 | { | |
685 | int bit; | |
686 | ||
881bf281 AW |
687 | /* |
688 | * the data bit is set on D0, and the clock on STROBE. | |
689 | * LCD reads D0 on STROBE's rising edge. | |
690 | */ | |
698b1515 | 691 | for (bit = 0; bit < 8; bit++) { |
bea7433b | 692 | clear_bit(LCD_BIT_CL, bits); /* CLK low */ |
6136ac86 | 693 | panel_set_bits(); |
bea7433b DC |
694 | if (byte & 1) { |
695 | set_bit(LCD_BIT_DA, bits); | |
696 | } else { | |
697 | clear_bit(LCD_BIT_DA, bits); | |
698 | } | |
699 | ||
6136ac86 | 700 | panel_set_bits(); |
429ccf05 | 701 | udelay(2); /* maintain the data during 2 us before CLK up */ |
bea7433b | 702 | set_bit(LCD_BIT_CL, bits); /* CLK high */ |
6136ac86 | 703 | panel_set_bits(); |
429ccf05 | 704 | udelay(1); /* maintain the strobe during 1 us */ |
698b1515 WT |
705 | byte >>= 1; |
706 | } | |
7005b584 WT |
707 | } |
708 | ||
709 | /* turn the backlight on or off */ | |
66ce7d5c | 710 | static void lcd_backlight(struct charlcd *charlcd, enum charlcd_onoff on) |
698b1515 | 711 | { |
39f8ea46 GU |
712 | if (lcd.pins.bl == PIN_NONE) |
713 | return; | |
714 | ||
6975e183 | 715 | /* The backlight is activated by setting the AUTOFEED line to +5V */ |
d4d2dbca | 716 | spin_lock_irq(&pprt_lock); |
bea7433b DC |
717 | if (on) |
718 | set_bit(LCD_BIT_BL, bits); | |
719 | else | |
720 | clear_bit(LCD_BIT_BL, bits); | |
6136ac86 | 721 | panel_set_bits(); |
d4d2dbca | 722 | spin_unlock_irq(&pprt_lock); |
7005b584 WT |
723 | } |
724 | ||
725 | /* send a command to the LCD panel in serial mode */ | |
2c6a82f2 | 726 | static void lcd_write_cmd_s(struct hd44780_common *hdc, int cmd) |
698b1515 | 727 | { |
d4d2dbca | 728 | spin_lock_irq(&pprt_lock); |
698b1515 WT |
729 | lcd_send_serial(0x1F); /* R/W=W, RS=0 */ |
730 | lcd_send_serial(cmd & 0x0F); | |
731 | lcd_send_serial((cmd >> 4) & 0x0F); | |
b64a1cbe | 732 | udelay(40); /* the shortest command takes at least 40 us */ |
d4d2dbca | 733 | spin_unlock_irq(&pprt_lock); |
7005b584 WT |
734 | } |
735 | ||
736 | /* send data to the LCD panel in serial mode */ | |
71ff701b | 737 | static void lcd_write_data_s(struct hd44780_common *hdc, int data) |
698b1515 | 738 | { |
d4d2dbca | 739 | spin_lock_irq(&pprt_lock); |
698b1515 WT |
740 | lcd_send_serial(0x5F); /* R/W=W, RS=1 */ |
741 | lcd_send_serial(data & 0x0F); | |
742 | lcd_send_serial((data >> 4) & 0x0F); | |
b64a1cbe | 743 | udelay(40); /* the shortest data takes at least 40 us */ |
d4d2dbca | 744 | spin_unlock_irq(&pprt_lock); |
7005b584 WT |
745 | } |
746 | ||
747 | /* send a command to the LCD panel in 8 bits parallel mode */ | |
2c6a82f2 | 748 | static void lcd_write_cmd_p8(struct hd44780_common *hdc, int cmd) |
698b1515 | 749 | { |
d4d2dbca | 750 | spin_lock_irq(&pprt_lock); |
698b1515 WT |
751 | /* present the data to the data port */ |
752 | w_dtr(pprt, cmd); | |
b64a1cbe | 753 | udelay(20); /* maintain the data during 20 us before the strobe */ |
7005b584 | 754 | |
bea7433b DC |
755 | set_bit(LCD_BIT_E, bits); |
756 | clear_bit(LCD_BIT_RS, bits); | |
757 | clear_bit(LCD_BIT_RW, bits); | |
698b1515 | 758 | set_ctrl_bits(); |
7005b584 | 759 | |
b64a1cbe | 760 | udelay(40); /* maintain the strobe during 40 us */ |
7005b584 | 761 | |
bea7433b | 762 | clear_bit(LCD_BIT_E, bits); |
698b1515 | 763 | set_ctrl_bits(); |
7005b584 | 764 | |
b64a1cbe | 765 | udelay(120); /* the shortest command takes at least 120 us */ |
d4d2dbca | 766 | spin_unlock_irq(&pprt_lock); |
7005b584 WT |
767 | } |
768 | ||
769 | /* send data to the LCD panel in 8 bits parallel mode */ | |
71ff701b | 770 | static void lcd_write_data_p8(struct hd44780_common *hdc, int data) |
698b1515 | 771 | { |
d4d2dbca | 772 | spin_lock_irq(&pprt_lock); |
698b1515 WT |
773 | /* present the data to the data port */ |
774 | w_dtr(pprt, data); | |
b64a1cbe | 775 | udelay(20); /* maintain the data during 20 us before the strobe */ |
7005b584 | 776 | |
bea7433b DC |
777 | set_bit(LCD_BIT_E, bits); |
778 | set_bit(LCD_BIT_RS, bits); | |
779 | clear_bit(LCD_BIT_RW, bits); | |
698b1515 | 780 | set_ctrl_bits(); |
7005b584 | 781 | |
b64a1cbe | 782 | udelay(40); /* maintain the strobe during 40 us */ |
7005b584 | 783 | |
bea7433b | 784 | clear_bit(LCD_BIT_E, bits); |
698b1515 | 785 | set_ctrl_bits(); |
7005b584 | 786 | |
b64a1cbe | 787 | udelay(45); /* the shortest data takes at least 45 us */ |
d4d2dbca | 788 | spin_unlock_irq(&pprt_lock); |
7005b584 WT |
789 | } |
790 | ||
77943d31 | 791 | /* send a command to the TI LCD panel */ |
2c6a82f2 | 792 | static void lcd_write_cmd_tilcd(struct hd44780_common *hdc, int cmd) |
77943d31 | 793 | { |
d4d2dbca | 794 | spin_lock_irq(&pprt_lock); |
77943d31 SR |
795 | /* present the data to the control port */ |
796 | w_ctr(pprt, cmd); | |
b64a1cbe | 797 | udelay(60); |
d4d2dbca | 798 | spin_unlock_irq(&pprt_lock); |
77943d31 SR |
799 | } |
800 | ||
801 | /* send data to the TI LCD panel */ | |
71ff701b | 802 | static void lcd_write_data_tilcd(struct hd44780_common *hdc, int data) |
77943d31 | 803 | { |
d4d2dbca | 804 | spin_lock_irq(&pprt_lock); |
77943d31 SR |
805 | /* present the data to the data port */ |
806 | w_dtr(pprt, data); | |
b64a1cbe | 807 | udelay(60); |
d4d2dbca | 808 | spin_unlock_irq(&pprt_lock); |
77943d31 SR |
809 | } |
810 | ||
351dcacc | 811 | static const struct charlcd_ops charlcd_ops = { |
39f8ea46 | 812 | .backlight = lcd_backlight, |
32d917e7 | 813 | .print = hd44780_common_print, |
d3a2fb81 | 814 | .gotoxy = hd44780_common_gotoxy, |
88645a86 | 815 | .home = hd44780_common_home, |
45421ffe | 816 | .clear_display = hd44780_common_clear_display, |
01ec46df | 817 | .init_display = hd44780_common_init_display, |
d2f2187e LP |
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, | |
339acb08 | 825 | .redefine_char = hd44780_common_redefine_char, |
39f8ea46 | 826 | }; |
7005b584 | 827 | |
39f8ea46 GU |
828 | /* initialize the LCD driver */ |
829 | static void lcd_init(void) | |
429ccf05 | 830 | { |
39f8ea46 | 831 | struct charlcd *charlcd; |
718e05ed LP |
832 | struct hd44780_common *hdc; |
833 | ||
834 | hdc = hd44780_common_alloc(); | |
835 | if (!hdc) | |
836 | return; | |
429ccf05 | 837 | |
2545c1c9 | 838 | charlcd = charlcd_alloc(); |
718e05ed LP |
839 | if (!charlcd) { |
840 | kfree(hdc); | |
39f8ea46 | 841 | return; |
718e05ed LP |
842 | } |
843 | ||
844 | hdc->hd44780 = &lcd; | |
845 | charlcd->drvdata = hdc; | |
70a8c3eb | 846 | |
8c17893c | 847 | /* |
39f8ea46 GU |
848 | * Init lcd struct with load-time values to preserve exact |
849 | * current functionality (at least for now). | |
8c17893c | 850 | */ |
39f8ea46 GU |
851 | charlcd->height = lcd_height; |
852 | charlcd->width = lcd_width; | |
2545c1c9 LP |
853 | hdc->bwidth = lcd_bwidth; |
854 | hdc->hwidth = lcd_hwidth; | |
70a8c3eb | 855 | |
87b8e0c8 | 856 | switch (selected_lcd_type) { |
429ccf05 HH |
857 | case LCD_TYPE_OLD: |
858 | /* parallel mode, 8 bits */ | |
8037e2a3 MG |
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 | ||
39f8ea46 | 864 | charlcd->width = 40; |
2545c1c9 LP |
865 | hdc->bwidth = 40; |
866 | hdc->hwidth = 64; | |
39f8ea46 | 867 | charlcd->height = 2; |
7005b584 | 868 | break; |
429ccf05 HH |
869 | case LCD_TYPE_KS0074: |
870 | /* serial mode, ks0074 */ | |
8037e2a3 MG |
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 | ||
39f8ea46 | 877 | charlcd->width = 16; |
2545c1c9 LP |
878 | hdc->bwidth = 40; |
879 | hdc->hwidth = 16; | |
39f8ea46 | 880 | charlcd->height = 2; |
7005b584 | 881 | break; |
429ccf05 HH |
882 | case LCD_TYPE_NEXCOM: |
883 | /* parallel mode, 8 bits, generic */ | |
8037e2a3 MG |
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 | ||
39f8ea46 | 890 | charlcd->width = 16; |
2545c1c9 LP |
891 | hdc->bwidth = 40; |
892 | hdc->hwidth = 64; | |
39f8ea46 | 893 | charlcd->height = 2; |
7005b584 | 894 | break; |
429ccf05 HH |
895 | case LCD_TYPE_CUSTOM: |
896 | /* customer-defined */ | |
8037e2a3 MG |
897 | lcd.proto = DEFAULT_LCD_PROTO; |
898 | lcd.charset = DEFAULT_LCD_CHARSET; | |
7005b584 WT |
899 | /* default geometry will be set later */ |
900 | break; | |
429ccf05 HH |
901 | case LCD_TYPE_HANTRONIX: |
902 | /* parallel mode, 8 bits, hantronix-like */ | |
698b1515 | 903 | default: |
8037e2a3 MG |
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 | ||
39f8ea46 | 909 | charlcd->width = 16; |
2545c1c9 LP |
910 | hdc->bwidth = 40; |
911 | hdc->hwidth = 64; | |
39f8ea46 | 912 | charlcd->height = 2; |
7005b584 | 913 | break; |
698b1515 | 914 | } |
7005b584 | 915 | |
8037e2a3 | 916 | /* Overwrite with module params set on loading */ |
1a4b2e3e | 917 | if (lcd_height != NOT_SET) |
39f8ea46 | 918 | charlcd->height = lcd_height; |
1a4b2e3e | 919 | if (lcd_width != NOT_SET) |
39f8ea46 | 920 | charlcd->width = lcd_width; |
1a4b2e3e | 921 | if (lcd_bwidth != NOT_SET) |
2545c1c9 | 922 | hdc->bwidth = lcd_bwidth; |
1a4b2e3e | 923 | if (lcd_hwidth != NOT_SET) |
2545c1c9 | 924 | hdc->hwidth = lcd_hwidth; |
1a4b2e3e | 925 | if (lcd_charset != NOT_SET) |
8037e2a3 | 926 | lcd.charset = lcd_charset; |
1a4b2e3e | 927 | if (lcd_proto != NOT_SET) |
8037e2a3 MG |
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 | ||
698b1515 | 942 | /* this is used to catch wrong and default values */ |
39f8ea46 GU |
943 | if (charlcd->width <= 0) |
944 | charlcd->width = DEFAULT_LCD_WIDTH; | |
2545c1c9 LP |
945 | if (hdc->bwidth <= 0) |
946 | hdc->bwidth = DEFAULT_LCD_BWIDTH; | |
947 | if (hdc->hwidth <= 0) | |
948 | hdc->hwidth = DEFAULT_LCD_HWIDTH; | |
39f8ea46 GU |
949 | if (charlcd->height <= 0) |
950 | charlcd->height = DEFAULT_LCD_HEIGHT; | |
8037e2a3 MG |
951 | |
952 | if (lcd.proto == LCD_PROTO_SERIAL) { /* SERIAL */ | |
351dcacc | 953 | charlcd->ops = &charlcd_ops; |
71ff701b | 954 | hdc->write_data = lcd_write_data_s; |
2c6a82f2 | 955 | hdc->write_cmd = lcd_write_cmd_s; |
698b1515 | 956 | |
8037e2a3 MG |
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; | |
698b1515 | 961 | |
8037e2a3 | 962 | } else if (lcd.proto == LCD_PROTO_PARALLEL) { /* PARALLEL */ |
351dcacc | 963 | charlcd->ops = &charlcd_ops; |
71ff701b | 964 | hdc->write_data = lcd_write_data_p8; |
2c6a82f2 | 965 | hdc->write_cmd = lcd_write_cmd_p8; |
698b1515 | 966 | |
8037e2a3 MG |
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; | |
77943d31 | 973 | } else { |
351dcacc | 974 | charlcd->ops = &charlcd_ops; |
71ff701b | 975 | hdc->write_data = lcd_write_data_tilcd; |
2c6a82f2 | 976 | hdc->write_cmd = lcd_write_cmd_tilcd; |
698b1515 | 977 | } |
7005b584 | 978 | |
8037e2a3 MG |
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) | |
39f8ea46 | 999 | charlcd->char_conv = lcd_char_conv_ks0074; |
698b1515 | 1000 | else |
39f8ea46 | 1001 | charlcd->char_conv = NULL; |
698b1515 | 1002 | |
8037e2a3 | 1003 | pin_to_bits(lcd.pins.e, lcd_bits[LCD_PORT_D][LCD_BIT_E], |
698b1515 | 1004 | lcd_bits[LCD_PORT_C][LCD_BIT_E]); |
8037e2a3 | 1005 | pin_to_bits(lcd.pins.rs, lcd_bits[LCD_PORT_D][LCD_BIT_RS], |
698b1515 | 1006 | lcd_bits[LCD_PORT_C][LCD_BIT_RS]); |
8037e2a3 | 1007 | pin_to_bits(lcd.pins.rw, lcd_bits[LCD_PORT_D][LCD_BIT_RW], |
698b1515 | 1008 | lcd_bits[LCD_PORT_C][LCD_BIT_RW]); |
8037e2a3 | 1009 | pin_to_bits(lcd.pins.bl, lcd_bits[LCD_PORT_D][LCD_BIT_BL], |
698b1515 | 1010 | lcd_bits[LCD_PORT_C][LCD_BIT_BL]); |
8037e2a3 | 1011 | pin_to_bits(lcd.pins.cl, lcd_bits[LCD_PORT_D][LCD_BIT_CL], |
698b1515 | 1012 | lcd_bits[LCD_PORT_C][LCD_BIT_CL]); |
8037e2a3 | 1013 | pin_to_bits(lcd.pins.da, lcd_bits[LCD_PORT_D][LCD_BIT_DA], |
698b1515 WT |
1014 | lcd_bits[LCD_PORT_C][LCD_BIT_DA]); |
1015 | ||
39f8ea46 | 1016 | lcd.charlcd = charlcd; |
6d8b588c | 1017 | lcd.initialized = true; |
7005b584 WT |
1018 | } |
1019 | ||
7005b584 WT |
1020 | /* |
1021 | * These are the file operation function for user access to /dev/keypad | |
1022 | */ | |
1023 | ||
698b1515 | 1024 | static ssize_t keypad_read(struct file *file, |
cce75f41 | 1025 | char __user *buf, size_t count, loff_t *ppos) |
698b1515 | 1026 | { |
698b1515 | 1027 | unsigned i = *ppos; |
cce75f41 | 1028 | char __user *tmp = buf; |
7005b584 | 1029 | |
698b1515 WT |
1030 | if (keypad_buflen == 0) { |
1031 | if (file->f_flags & O_NONBLOCK) | |
1032 | return -EAGAIN; | |
7005b584 | 1033 | |
310df69c AB |
1034 | if (wait_event_interruptible(keypad_read_wait, |
1035 | keypad_buflen != 0)) | |
698b1515 WT |
1036 | return -EINTR; |
1037 | } | |
7005b584 | 1038 | |
429ccf05 HH |
1039 | for (; count-- > 0 && (keypad_buflen > 0); |
1040 | ++i, ++tmp, --keypad_buflen) { | |
698b1515 WT |
1041 | put_user(keypad_buffer[keypad_start], tmp); |
1042 | keypad_start = (keypad_start + 1) % KEYPAD_BUFFER; | |
1043 | } | |
1044 | *ppos = i; | |
7005b584 | 1045 | |
698b1515 | 1046 | return tmp - buf; |
7005b584 WT |
1047 | } |
1048 | ||
698b1515 WT |
1049 | static int keypad_open(struct inode *inode, struct file *file) |
1050 | { | |
93dc1774 WT |
1051 | int ret; |
1052 | ||
1053 | ret = -EBUSY; | |
f4757af8 | 1054 | if (!atomic_dec_and_test(&keypad_available)) |
93dc1774 | 1055 | goto fail; /* open only once at a time */ |
7005b584 | 1056 | |
93dc1774 | 1057 | ret = -EPERM; |
698b1515 | 1058 | if (file->f_mode & FMODE_WRITE) /* device is read-only */ |
93dc1774 | 1059 | goto fail; |
7005b584 | 1060 | |
698b1515 | 1061 | keypad_buflen = 0; /* flush the buffer on opening */ |
698b1515 | 1062 | return 0; |
93dc1774 WT |
1063 | fail: |
1064 | atomic_inc(&keypad_available); | |
1065 | return ret; | |
7005b584 WT |
1066 | } |
1067 | ||
698b1515 WT |
1068 | static int keypad_release(struct inode *inode, struct file *file) |
1069 | { | |
f4757af8 | 1070 | atomic_inc(&keypad_available); |
698b1515 | 1071 | return 0; |
7005b584 WT |
1072 | } |
1073 | ||
429ccf05 | 1074 | static const struct file_operations keypad_fops = { |
698b1515 WT |
1075 | .read = keypad_read, /* read */ |
1076 | .open = keypad_open, /* open */ | |
1077 | .release = keypad_release, /* close */ | |
6038f373 | 1078 | .llseek = default_llseek, |
7005b584 WT |
1079 | }; |
1080 | ||
1081 | static struct miscdevice keypad_dev = { | |
6c3773de MG |
1082 | .minor = KEYPAD_MINOR, |
1083 | .name = "keypad", | |
1084 | .fops = &keypad_fops, | |
7005b584 WT |
1085 | }; |
1086 | ||
36d2041a | 1087 | static void keypad_send_key(const char *string, int max_len) |
698b1515 | 1088 | { |
698b1515 | 1089 | /* send the key to the device only if a process is attached to it. */ |
f4757af8 | 1090 | if (!atomic_read(&keypad_available)) { |
698b1515 WT |
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); | |
7005b584 | 1096 | } |
7005b584 WT |
1097 | } |
1098 | ||
429ccf05 HH |
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". | |
7005b584 | 1102 | * |
429ccf05 HH |
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). | |
7005b584 | 1108 | */ |
698b1515 WT |
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 | ||
429ccf05 HH |
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); | |
698b1515 WT |
1129 | |
1130 | /* now that all outputs are cleared, the only active input bits are | |
1131 | * directly connected to the ground | |
7005b584 | 1132 | */ |
698b1515 | 1133 | |
429ccf05 HH |
1134 | /* 1 for each grounded input */ |
1135 | gndmask = PNL_PINPUT(r_str(pprt)) & scan_mask_i; | |
1136 | ||
1137 | /* grounded inputs are signals 40-44 */ | |
35fe0872 | 1138 | phys_read |= (__u64)gndmask << 40; |
7005b584 | 1139 | |
698b1515 | 1140 | if (bitmask != gndmask) { |
8c17893c NB |
1141 | /* |
1142 | * since clearing the outputs changed some inputs, we know | |
429ccf05 HH |
1143 | * that some input signals are currently tied to some outputs. |
1144 | * So we'll scan them. | |
698b1515 WT |
1145 | */ |
1146 | for (bit = 0; bit < 8; bit++) { | |
79f2af62 | 1147 | bitval = BIT(bit); |
7005b584 | 1148 | |
698b1515 WT |
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; | |
35fe0872 | 1154 | phys_read |= (__u64)bitmask << (5 * bit); |
698b1515 WT |
1155 | } |
1156 | w_dtr(pprt, oldval); /* disable all outputs */ | |
7005b584 | 1157 | } |
8c17893c NB |
1158 | /* |
1159 | * this is easy: use old bits when they are flapping, | |
1160 | * use new ones when stable | |
1161 | */ | |
429ccf05 HH |
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 | */ | |
fdf4a494 DB |
1186 | if (((phys_prev & input->mask) == input->value) && |
1187 | ((phys_curr & input->mask) > input->value)) { | |
429ccf05 HH |
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++; | |
b565b3fb | 1197 | if (input->u.std.press_fct) |
429ccf05 HH |
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; | |
c3ed0afc | 1205 | |
e6626de5 JC |
1206 | if (press_str[0]) { |
1207 | int s = sizeof(input->u.kbd.press_str); | |
c3ed0afc | 1208 | |
e6626de5 JC |
1209 | keypad_send_key(press_str, s); |
1210 | } | |
429ccf05 HH |
1211 | } |
1212 | ||
1213 | if (input->u.kbd.repeat_str[0]) { | |
1214 | char *repeat_str = input->u.kbd.repeat_str; | |
c3ed0afc | 1215 | |
429ccf05 | 1216 | if (input->high_timer >= KEYPAD_REP_START) { |
e6626de5 | 1217 | int s = sizeof(input->u.kbd.repeat_str); |
c3ed0afc | 1218 | |
429ccf05 | 1219 | input->high_timer -= KEYPAD_REP_DELAY; |
e6626de5 | 1220 | keypad_send_key(repeat_str, s); |
429ccf05 HH |
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; | |
429ccf05 | 1230 | } |
083b3638 VH |
1231 | |
1232 | /* else signal falling down. Let's fall through. */ | |
1233 | input->state = INPUT_ST_FALLING; | |
1234 | input->fall_timer = 0; | |
1235 | ||
429ccf05 HH |
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 */ | |
fdf4a494 DB |
1243 | if (((phys_prev & input->mask) == input->value) && |
1244 | ((phys_curr & input->mask) > input->value)) { | |
429ccf05 HH |
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; | |
c3ed0afc | 1257 | |
e6626de5 JC |
1258 | if (input->high_timer >= KEYPAD_REP_START) { |
1259 | int s = sizeof(input->u.kbd.repeat_str); | |
c3ed0afc | 1260 | |
429ccf05 | 1261 | input->high_timer -= KEYPAD_REP_DELAY; |
e6626de5 JC |
1262 | keypad_send_key(repeat_str, s); |
1263 | } | |
429ccf05 HH |
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; | |
c3ed0afc | 1276 | |
b565b3fb | 1277 | if (release_fct) |
429ccf05 HH |
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; | |
c3ed0afc | 1281 | |
e6626de5 JC |
1282 | if (release_str[0]) { |
1283 | int s = sizeof(input->u.kbd.release_str); | |
c3ed0afc | 1284 | |
e6626de5 JC |
1285 | keypad_send_key(release_str, s); |
1286 | } | |
429ccf05 HH |
1287 | } |
1288 | ||
1289 | input->state = INPUT_ST_LOW; | |
1290 | } else { | |
1291 | input->fall_timer++; | |
1292 | inputs_stable = 0; | |
1293 | } | |
7005b584 WT |
1294 | } |
1295 | ||
698b1515 WT |
1296 | static void panel_process_inputs(void) |
1297 | { | |
698b1515 | 1298 | struct logical_input *input; |
7005b584 | 1299 | |
698b1515 WT |
1300 | keypressed = 0; |
1301 | inputs_stable = 1; | |
4654bdb6 | 1302 | list_for_each_entry(input, &logical_inputs, list) { |
698b1515 WT |
1303 | switch (input->state) { |
1304 | case INPUT_ST_LOW: | |
1305 | if ((phys_curr & input->mask) != input->value) | |
1306 | break; | |
429ccf05 HH |
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. | |
698b1515 WT |
1313 | */ |
1314 | if ((phys_prev & input->mask) == input->value) | |
1315 | break; | |
1316 | input->rise_timer = 0; | |
1317 | input->state = INPUT_ST_RISING; | |
df561f66 | 1318 | fallthrough; |
698b1515 WT |
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; | |
df561f66 | 1331 | fallthrough; |
698b1515 | 1332 | case INPUT_ST_HIGH: |
429ccf05 | 1333 | if (input_state_high(input)) |
698b1515 | 1334 | break; |
df561f66 | 1335 | fallthrough; |
698b1515 | 1336 | case INPUT_ST_FALLING: |
429ccf05 | 1337 | input_state_falling(input); |
698b1515 WT |
1338 | } |
1339 | } | |
1340 | } | |
7005b584 | 1341 | |
607a6301 | 1342 | static void panel_scan_timer(struct timer_list *unused) |
698b1515 | 1343 | { |
a8b2580b | 1344 | if (keypad.enabled && keypad_initialized) { |
d4d2dbca | 1345 | if (spin_trylock_irq(&pprt_lock)) { |
698b1515 | 1346 | phys_scan_contacts(); |
429ccf05 HH |
1347 | |
1348 | /* no need for the parport anymore */ | |
d4d2dbca | 1349 | spin_unlock_irq(&pprt_lock); |
7005b584 WT |
1350 | } |
1351 | ||
698b1515 WT |
1352 | if (!inputs_stable || phys_curr != phys_prev) |
1353 | panel_process_inputs(); | |
7005b584 | 1354 | } |
7005b584 | 1355 | |
fda4ae18 | 1356 | if (keypressed && lcd.enabled && lcd.initialized) |
39f8ea46 | 1357 | charlcd_poke(lcd.charlcd); |
698b1515 WT |
1358 | |
1359 | mod_timer(&scan_timer, jiffies + INPUT_POLL_TIME); | |
7005b584 WT |
1360 | } |
1361 | ||
698b1515 WT |
1362 | static void init_scan_timer(void) |
1363 | { | |
b565b3fb | 1364 | if (scan_timer.function) |
698b1515 WT |
1365 | return; /* already started */ |
1366 | ||
607a6301 | 1367 | timer_setup(&scan_timer, panel_scan_timer, 0); |
698b1515 | 1368 | scan_timer.expires = jiffies + INPUT_POLL_TIME; |
698b1515 | 1369 | add_timer(&scan_timer); |
7005b584 WT |
1370 | } |
1371 | ||
1372 | /* converts a name of the form "({BbAaPpSsEe}{01234567-})*" to a series of bits. | |
429ccf05 HH |
1373 | * if <omask> or <imask> are non-null, they will be or'ed with the bits |
1374 | * corresponding to out and in bits respectively. | |
7005b584 WT |
1375 | * returns 1 if ok, 0 if error (in which case, nothing is written). |
1376 | */ | |
35fe0872 | 1377 | static u8 input_name2mask(const char *name, __u64 *mask, __u64 *value, |
d938e1eb | 1378 | u8 *imask, u8 *omask) |
698b1515 | 1379 | { |
8aa7307b | 1380 | const char sigtab[] = "EeSsPpAaBb"; |
d938e1eb | 1381 | u8 im, om; |
35fe0872 | 1382 | __u64 m, v; |
698b1515 | 1383 | |
d12f27e8 KS |
1384 | om = 0; |
1385 | im = 0; | |
2d53426b DB |
1386 | m = 0ULL; |
1387 | v = 0ULL; | |
698b1515 WT |
1388 | while (*name) { |
1389 | int in, out, bit, neg; | |
8aa7307b | 1390 | const char *idx; |
c3ed0afc | 1391 | |
8aa7307b KS |
1392 | idx = strchr(sigtab, *name); |
1393 | if (!idx) | |
698b1515 | 1394 | return 0; /* input name not found */ |
8aa7307b KS |
1395 | |
1396 | in = idx - sigtab; | |
698b1515 WT |
1397 | neg = (in & 1); /* odd (lower) names are negated */ |
1398 | in >>= 1; | |
79f2af62 | 1399 | im |= BIT(in); |
698b1515 WT |
1400 | |
1401 | name++; | |
52ebf93f | 1402 | if (*name >= '0' && *name <= '7') { |
698b1515 | 1403 | out = *name - '0'; |
79f2af62 | 1404 | om |= BIT(out); |
3ac76904 | 1405 | } else if (*name == '-') { |
698b1515 | 1406 | out = 8; |
3ac76904 | 1407 | } else { |
698b1515 | 1408 | return 0; /* unknown bit name */ |
3ac76904 | 1409 | } |
698b1515 WT |
1410 | |
1411 | bit = (out * 5) + in; | |
1412 | ||
1413 | m |= 1ULL << bit; | |
1414 | if (!neg) | |
1415 | v |= 1ULL << bit; | |
1416 | name++; | |
7005b584 | 1417 | } |
698b1515 WT |
1418 | *mask = m; |
1419 | *value = v; | |
1420 | if (imask) | |
1421 | *imask |= im; | |
1422 | if (omask) | |
1423 | *omask |= om; | |
1424 | return 1; | |
7005b584 WT |
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 | */ | |
36d2041a PH |
1431 | static struct logical_input *panel_bind_key(const char *name, const char *press, |
1432 | const char *repeat, | |
1433 | const char *release) | |
698b1515 WT |
1434 | { |
1435 | struct logical_input *key; | |
1436 | ||
fdf4a494 | 1437 | key = kzalloc(sizeof(*key), GFP_KERNEL); |
eb073a9b | 1438 | if (!key) |
698b1515 | 1439 | return NULL; |
eb073a9b | 1440 | |
698b1515 | 1441 | if (!input_name2mask(name, &key->mask, &key->value, &scan_mask_i, |
cb46f472 KV |
1442 | &scan_mask_o)) { |
1443 | kfree(key); | |
698b1515 | 1444 | return NULL; |
cb46f472 | 1445 | } |
698b1515 WT |
1446 | |
1447 | key->type = INPUT_TYPE_KBD; | |
1448 | key->state = INPUT_ST_LOW; | |
1449 | key->rise_time = 1; | |
1450 | key->fall_time = 1; | |
7005b584 | 1451 | |
698b1515 WT |
1452 | strncpy(key->u.kbd.press_str, press, sizeof(key->u.kbd.press_str)); |
1453 | strncpy(key->u.kbd.repeat_str, repeat, sizeof(key->u.kbd.repeat_str)); | |
1454 | strncpy(key->u.kbd.release_str, release, | |
1455 | sizeof(key->u.kbd.release_str)); | |
1456 | list_add(&key->list, &logical_inputs); | |
1457 | return key; | |
7005b584 WT |
1458 | } |
1459 | ||
63023177 | 1460 | #if 0 |
7005b584 WT |
1461 | /* tries to bind a callback function to the signal name <name>. The function |
1462 | * <press_fct> will be called with the <press_data> arg when the signal is | |
1463 | * activated, and so on for <release_fct>/<release_data> | |
429ccf05 HH |
1464 | * Returns the pointer to the new signal if ok, NULL if the signal could not |
1465 | * be bound. | |
7005b584 WT |
1466 | */ |
1467 | static struct logical_input *panel_bind_callback(char *name, | |
68d386bf | 1468 | void (*press_fct)(int), |
698b1515 | 1469 | int press_data, |
68d386bf | 1470 | void (*release_fct)(int), |
698b1515 WT |
1471 | int release_data) |
1472 | { | |
1473 | struct logical_input *callback; | |
1474 | ||
fdf4a494 | 1475 | callback = kmalloc(sizeof(*callback), GFP_KERNEL); |
eb073a9b | 1476 | if (!callback) |
698b1515 | 1477 | return NULL; |
eb073a9b | 1478 | |
698b1515 WT |
1479 | memset(callback, 0, sizeof(struct logical_input)); |
1480 | if (!input_name2mask(name, &callback->mask, &callback->value, | |
1481 | &scan_mask_i, &scan_mask_o)) | |
1482 | return NULL; | |
1483 | ||
1484 | callback->type = INPUT_TYPE_STD; | |
1485 | callback->state = INPUT_ST_LOW; | |
1486 | callback->rise_time = 1; | |
1487 | callback->fall_time = 1; | |
1488 | callback->u.std.press_fct = press_fct; | |
1489 | callback->u.std.press_data = press_data; | |
1490 | callback->u.std.release_fct = release_fct; | |
1491 | callback->u.std.release_data = release_data; | |
1492 | list_add(&callback->list, &logical_inputs); | |
1493 | return callback; | |
7005b584 | 1494 | } |
63023177 | 1495 | #endif |
7005b584 | 1496 | |
698b1515 WT |
1497 | static void keypad_init(void) |
1498 | { | |
1499 | int keynum; | |
c3ed0afc | 1500 | |
698b1515 WT |
1501 | init_waitqueue_head(&keypad_read_wait); |
1502 | keypad_buflen = 0; /* flushes any eventual noisy keystroke */ | |
7005b584 | 1503 | |
698b1515 | 1504 | /* Let's create all known keys */ |
7005b584 | 1505 | |
698b1515 WT |
1506 | for (keynum = 0; keypad_profile[keynum][0][0]; keynum++) { |
1507 | panel_bind_key(keypad_profile[keynum][0], | |
1508 | keypad_profile[keynum][1], | |
1509 | keypad_profile[keynum][2], | |
1510 | keypad_profile[keynum][3]); | |
1511 | } | |
7005b584 | 1512 | |
698b1515 WT |
1513 | init_scan_timer(); |
1514 | keypad_initialized = 1; | |
7005b584 WT |
1515 | } |
1516 | ||
7005b584 WT |
1517 | /**************************************************/ |
1518 | /* device initialization */ | |
1519 | /**************************************************/ | |
1520 | ||
698b1515 | 1521 | static void panel_attach(struct parport *port) |
7005b584 | 1522 | { |
9be83c0a SM |
1523 | struct pardev_cb panel_cb; |
1524 | ||
698b1515 WT |
1525 | if (port->number != parport) |
1526 | return; | |
1527 | ||
1528 | if (pprt) { | |
eb073a9b TY |
1529 | pr_err("%s: port->number=%d parport=%d, already registered!\n", |
1530 | __func__, port->number, parport); | |
698b1515 WT |
1531 | return; |
1532 | } | |
1533 | ||
9be83c0a SM |
1534 | memset(&panel_cb, 0, sizeof(panel_cb)); |
1535 | panel_cb.private = &pprt; | |
1536 | /* panel_cb.flags = 0 should be PARPORT_DEV_EXCL? */ | |
1537 | ||
1538 | pprt = parport_register_dev_model(port, "panel", &panel_cb, 0); | |
b565b3fb | 1539 | if (!pprt) { |
eb073a9b TY |
1540 | pr_err("%s: port->number=%d parport=%d, parport_register_device() failed\n", |
1541 | __func__, port->number, parport); | |
10f3f5b7 KV |
1542 | return; |
1543 | } | |
698b1515 WT |
1544 | |
1545 | if (parport_claim(pprt)) { | |
eb073a9b TY |
1546 | pr_err("could not claim access to parport%d. Aborting.\n", |
1547 | parport); | |
10f3f5b7 | 1548 | goto err_unreg_device; |
698b1515 WT |
1549 | } |
1550 | ||
429ccf05 HH |
1551 | /* must init LCD first, just in case an IRQ from the keypad is |
1552 | * generated at keypad init | |
1553 | */ | |
a8b2580b | 1554 | if (lcd.enabled) { |
698b1515 | 1555 | lcd_init(); |
39f8ea46 | 1556 | if (!lcd.charlcd || charlcd_register(lcd.charlcd)) |
10f3f5b7 | 1557 | goto err_unreg_device; |
698b1515 WT |
1558 | } |
1559 | ||
a8b2580b | 1560 | if (keypad.enabled) { |
698b1515 | 1561 | keypad_init(); |
10f3f5b7 KV |
1562 | if (misc_register(&keypad_dev)) |
1563 | goto err_lcd_unreg; | |
698b1515 | 1564 | } |
10f3f5b7 KV |
1565 | return; |
1566 | ||
1567 | err_lcd_unreg: | |
b33d5675 | 1568 | if (scan_timer.function) |
1569 | del_timer_sync(&scan_timer); | |
a8b2580b | 1570 | if (lcd.enabled) |
39f8ea46 | 1571 | charlcd_unregister(lcd.charlcd); |
10f3f5b7 | 1572 | err_unreg_device: |
718e05ed | 1573 | kfree(lcd.charlcd); |
39f8ea46 | 1574 | lcd.charlcd = NULL; |
10f3f5b7 KV |
1575 | parport_unregister_device(pprt); |
1576 | pprt = NULL; | |
7005b584 WT |
1577 | } |
1578 | ||
698b1515 | 1579 | static void panel_detach(struct parport *port) |
7005b584 | 1580 | { |
698b1515 WT |
1581 | if (port->number != parport) |
1582 | return; | |
1583 | ||
1584 | if (!pprt) { | |
eb073a9b TY |
1585 | pr_err("%s: port->number=%d parport=%d, nothing to unregister.\n", |
1586 | __func__, port->number, parport); | |
698b1515 WT |
1587 | return; |
1588 | } | |
b565b3fb | 1589 | if (scan_timer.function) |
7d98c63e | 1590 | del_timer_sync(&scan_timer); |
698b1515 | 1591 | |
3f77b439 GU |
1592 | if (keypad.enabled) { |
1593 | misc_deregister(&keypad_dev); | |
1594 | keypad_initialized = 0; | |
1595 | } | |
698b1515 | 1596 | |
3f77b439 | 1597 | if (lcd.enabled) { |
39f8ea46 | 1598 | charlcd_unregister(lcd.charlcd); |
3f77b439 | 1599 | lcd.initialized = false; |
718e05ed LP |
1600 | kfree(lcd.charlcd->drvdata); |
1601 | kfree(lcd.charlcd); | |
39f8ea46 | 1602 | lcd.charlcd = NULL; |
0b0595bf | 1603 | } |
3f77b439 GU |
1604 | |
1605 | /* TODO: free all input signals */ | |
1606 | parport_release(pprt); | |
1607 | parport_unregister_device(pprt); | |
1608 | pprt = NULL; | |
7005b584 WT |
1609 | } |
1610 | ||
1611 | static struct parport_driver panel_driver = { | |
698b1515 | 1612 | .name = "panel", |
9be83c0a | 1613 | .match_port = panel_attach, |
698b1515 | 1614 | .detach = panel_detach, |
9be83c0a | 1615 | .devmodel = true, |
7005b584 WT |
1616 | }; |
1617 | ||
1618 | /* init function */ | |
d9114767 | 1619 | static int __init panel_init_module(void) |
698b1515 | 1620 | { |
e134201b | 1621 | int selected_keypad_type = NOT_SET, err; |
698b1515 | 1622 | |
698b1515 WT |
1623 | /* take care of an eventual profile */ |
1624 | switch (profile) { | |
429ccf05 HH |
1625 | case PANEL_PROFILE_CUSTOM: |
1626 | /* custom profile */ | |
87b8e0c8 MG |
1627 | selected_keypad_type = DEFAULT_KEYPAD_TYPE; |
1628 | selected_lcd_type = DEFAULT_LCD_TYPE; | |
698b1515 | 1629 | break; |
429ccf05 HH |
1630 | case PANEL_PROFILE_OLD: |
1631 | /* 8 bits, 2*16, old keypad */ | |
87b8e0c8 MG |
1632 | selected_keypad_type = KEYPAD_TYPE_OLD; |
1633 | selected_lcd_type = LCD_TYPE_OLD; | |
1634 | ||
1635 | /* TODO: This two are a little hacky, sort it out later */ | |
2d35bcf6 | 1636 | if (lcd_width == NOT_SET) |
698b1515 | 1637 | lcd_width = 16; |
2d35bcf6 | 1638 | if (lcd_hwidth == NOT_SET) |
698b1515 WT |
1639 | lcd_hwidth = 16; |
1640 | break; | |
429ccf05 HH |
1641 | case PANEL_PROFILE_NEW: |
1642 | /* serial, 2*16, new keypad */ | |
87b8e0c8 MG |
1643 | selected_keypad_type = KEYPAD_TYPE_NEW; |
1644 | selected_lcd_type = LCD_TYPE_KS0074; | |
698b1515 | 1645 | break; |
429ccf05 HH |
1646 | case PANEL_PROFILE_HANTRONIX: |
1647 | /* 8 bits, 2*16 hantronix-like, no keypad */ | |
87b8e0c8 MG |
1648 | selected_keypad_type = KEYPAD_TYPE_NONE; |
1649 | selected_lcd_type = LCD_TYPE_HANTRONIX; | |
698b1515 | 1650 | break; |
429ccf05 HH |
1651 | case PANEL_PROFILE_NEXCOM: |
1652 | /* generic 8 bits, 2*16, nexcom keypad, eg. Nexcom. */ | |
87b8e0c8 MG |
1653 | selected_keypad_type = KEYPAD_TYPE_NEXCOM; |
1654 | selected_lcd_type = LCD_TYPE_NEXCOM; | |
698b1515 | 1655 | break; |
429ccf05 HH |
1656 | case PANEL_PROFILE_LARGE: |
1657 | /* 8 bits, 2*40, old keypad */ | |
87b8e0c8 MG |
1658 | selected_keypad_type = KEYPAD_TYPE_OLD; |
1659 | selected_lcd_type = LCD_TYPE_OLD; | |
698b1515 WT |
1660 | break; |
1661 | } | |
1662 | ||
87b8e0c8 MG |
1663 | /* |
1664 | * Overwrite selection with module param values (both keypad and lcd), | |
1665 | * where the deprecated params have lower prio. | |
1666 | */ | |
1a4b2e3e | 1667 | if (keypad_enabled != NOT_SET) |
87b8e0c8 | 1668 | selected_keypad_type = keypad_enabled; |
1a4b2e3e | 1669 | if (keypad_type != NOT_SET) |
87b8e0c8 MG |
1670 | selected_keypad_type = keypad_type; |
1671 | ||
1672 | keypad.enabled = (selected_keypad_type > 0); | |
1673 | ||
1a4b2e3e | 1674 | if (lcd_enabled != NOT_SET) |
87b8e0c8 | 1675 | selected_lcd_type = lcd_enabled; |
1a4b2e3e | 1676 | if (lcd_type != NOT_SET) |
87b8e0c8 MG |
1677 | selected_lcd_type = lcd_type; |
1678 | ||
1679 | lcd.enabled = (selected_lcd_type > 0); | |
698b1515 | 1680 | |
733345ec SM |
1681 | if (lcd.enabled) { |
1682 | /* | |
1683 | * Init lcd struct with load-time values to preserve exact | |
1684 | * current functionality (at least for now). | |
1685 | */ | |
733345ec SM |
1686 | lcd.charset = lcd_charset; |
1687 | lcd.proto = lcd_proto; | |
1688 | lcd.pins.e = lcd_e_pin; | |
1689 | lcd.pins.rs = lcd_rs_pin; | |
1690 | lcd.pins.rw = lcd_rw_pin; | |
1691 | lcd.pins.cl = lcd_cl_pin; | |
1692 | lcd.pins.da = lcd_da_pin; | |
1693 | lcd.pins.bl = lcd_bl_pin; | |
733345ec SM |
1694 | } |
1695 | ||
87b8e0c8 | 1696 | switch (selected_keypad_type) { |
698b1515 WT |
1697 | case KEYPAD_TYPE_OLD: |
1698 | keypad_profile = old_keypad_profile; | |
1699 | break; | |
1700 | case KEYPAD_TYPE_NEW: | |
1701 | keypad_profile = new_keypad_profile; | |
1702 | break; | |
1703 | case KEYPAD_TYPE_NEXCOM: | |
1704 | keypad_profile = nexcom_keypad_profile; | |
1705 | break; | |
1706 | default: | |
1707 | keypad_profile = NULL; | |
1708 | break; | |
1709 | } | |
1710 | ||
a8b2580b | 1711 | if (!lcd.enabled && !keypad.enabled) { |
f43de77c | 1712 | /* no device enabled, let's exit */ |
30f468b2 | 1713 | pr_err("panel driver disabled.\n"); |
698b1515 | 1714 | return -ENODEV; |
7005b584 | 1715 | } |
7005b584 | 1716 | |
e134201b SM |
1717 | err = parport_register_driver(&panel_driver); |
1718 | if (err) { | |
f43de77c | 1719 | pr_err("could not register with parport. Aborting.\n"); |
e134201b | 1720 | return err; |
f43de77c SM |
1721 | } |
1722 | ||
698b1515 | 1723 | if (pprt) |
30f468b2 GU |
1724 | pr_info("panel driver registered on parport%d (io=0x%lx).\n", |
1725 | parport, pprt->port->base); | |
698b1515 | 1726 | else |
30f468b2 | 1727 | pr_info("panel driver not yet registered\n"); |
698b1515 WT |
1728 | return 0; |
1729 | } | |
7005b584 | 1730 | |
f6d1fcfe | 1731 | static void __exit panel_cleanup_module(void) |
698b1515 | 1732 | { |
698b1515 | 1733 | parport_unregister_driver(&panel_driver); |
7005b584 | 1734 | } |
7005b584 | 1735 | |
7005b584 WT |
1736 | module_init(panel_init_module); |
1737 | module_exit(panel_cleanup_module); | |
1738 | MODULE_AUTHOR("Willy Tarreau"); | |
1739 | MODULE_LICENSE("GPL"); | |
7005b584 WT |
1740 | |
1741 | /* | |
1742 | * Local variables: | |
1743 | * c-indent-level: 4 | |
1744 | * tab-width: 8 | |
1745 | * End: | |
1746 | */ |