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7005b584 1/*
698b1515
WT		 2 * Front panel driver for Linux
3 * Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu>
7005b584 4 *
698b1515
WT		 5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version
8 * 2 of the License, or (at your option) any later version.
7005b584 9 *
698b1515
WT		 10 * This code drives an LCD module (/dev/lcd), and a keypad (/dev/keypad)
11 * connected to a parallel printer port.
7005b584 12 *
698b1515
WT		 13 * The LCD module may either be an HD44780-like 8-bit parallel LCD, or a 1-bit
14 * serial module compatible with Samsung's KS0074. The pins may be connected in
15 * any combination, everything is programmable.
7005b584 16 *
698b1515
WT		 17 * The keypad consists in a matrix of push buttons connecting input pins to
18 * data output pins or to the ground. The combinations have to be hard-coded
19 * in the driver, though several profiles exist and adding new ones is easy.
7005b584 20 *
698b1515
WT		 21 * Several profiles are provided for commonly found LCD+keypad modules on the
22 * market, such as those found in Nexcom's appliances.
7005b584
WT		 23 *
24 * FIXME:
25 * - the initialization/deinitialization process is very dirty and should
26 * be rewritten. It may even be buggy.
27 *
28 * TODO:
29 * - document 24 keys keyboard (3 rows of 8 cols, 32 diodes + 2 inputs)
30 * - make the LCD a part of a virtual screen of Vx*Vy
31 * - make the inputs list smp-safe
32 * - change the keyboard to a double mapping : signals -> key_id -> values
33 * so that applications can change values without knowing signals
34 *
35 */
36
37#include <linux/module.h>
38
39#include <linux/types.h>
40#include <linux/errno.h>
41#include <linux/signal.h>
42#include <linux/sched.h>
43#include <linux/spinlock.h>
7005b584
WT		 44#include <linux/interrupt.h>
45#include <linux/miscdevice.h>
698b1515 46#include <linux/slab.h>
7005b584
WT		 47#include <linux/ioport.h>
48#include <linux/fcntl.h>
49#include <linux/init.h>
50#include <linux/delay.h>
d85170ed 51#include <linux/kernel.h>
7005b584
WT		 52#include <linux/ctype.h>
53#include <linux/parport.h>
54#include <linux/version.h>
55#include <linux/list.h>
56#include <linux/notifier.h>
57#include <linux/reboot.h>
273b281f 58#include <generated/utsrelease.h>
7005b584 59
698b1515 60#include <linux/io.h>
48f658bb 61#include <linux/uaccess.h>
7005b584
WT		 62#include <asm/system.h>
63
7005b584
WT		 64#define LCD_MINOR 156
65#define KEYPAD_MINOR 185
7005b584
WT		 66
67#define PANEL_VERSION "0.9.5"
68
69#define LCD_MAXBYTES 256 /* max burst write */
70
7005b584 71#define KEYPAD_BUFFER 64
7005b584 72
429ccf05
HH		 73/* poll the keyboard this every second */
74#define INPUT_POLL_TIME (HZ/50)
75/* a key starts to repeat after this times INPUT_POLL_TIME */
76#define KEYPAD_REP_START (10)
77/* a key repeats this times INPUT_POLL_TIME */
78#define KEYPAD_REP_DELAY (2)
79
80/* keep the light on this times INPUT_POLL_TIME for each flash */
81#define FLASH_LIGHT_TEMPO (200)
7005b584
WT		 82
83/* converts an r_str() input to an active high, bits string : 000BAOSE */
84#define PNL_PINPUT(a) ((((unsigned char)(a)) ^ 0x7F) >> 3)
85
698b1515
WT		 86#define PNL_PBUSY 0x80 /* inverted input, active low */
87#define PNL_PACK 0x40 /* direct input, active low */
88#define PNL_POUTPA 0x20 /* direct input, active high */
89#define PNL_PSELECD 0x10 /* direct input, active high */
90#define PNL_PERRORP 0x08 /* direct input, active low */
7005b584 91
698b1515 92#define PNL_PBIDIR 0x20 /* bi-directional ports */
429ccf05
HH		 93/* high to read data in or-ed with data out */
94#define PNL_PINTEN 0x10
698b1515
WT		 95#define PNL_PSELECP 0x08 /* inverted output, active low */
96#define PNL_PINITP 0x04 /* direct output, active low */
97#define PNL_PAUTOLF 0x02 /* inverted output, active low */
98#define PNL_PSTROBE 0x01 /* inverted output */
7005b584
WT		 99
100#define PNL_PD0 0x01
101#define PNL_PD1 0x02
102#define PNL_PD2 0x04
103#define PNL_PD3 0x08
104#define PNL_PD4 0x10
105#define PNL_PD5 0x20
106#define PNL_PD6 0x40
107#define PNL_PD7 0x80
108
109#define PIN_NONE 0
110#define PIN_STROBE 1
111#define PIN_D0 2
112#define PIN_D1 3
113#define PIN_D2 4
114#define PIN_D3 5
115#define PIN_D4 6
116#define PIN_D5 7
117#define PIN_D6 8
118#define PIN_D7 9
119#define PIN_AUTOLF 14
120#define PIN_INITP 16
121#define PIN_SELECP 17
122#define PIN_NOT_SET 127
123
7005b584
WT		 124#define LCD_FLAG_S 0x0001
125#define LCD_FLAG_ID 0x0002
126#define LCD_FLAG_B 0x0004 /* blink on */
127#define LCD_FLAG_C 0x0008 /* cursor on */
128#define LCD_FLAG_D 0x0010 /* display on */
129#define LCD_FLAG_F 0x0020 /* large font mode */
130#define LCD_FLAG_N 0x0040 /* 2-rows mode */
131#define LCD_FLAG_L 0x0080 /* backlight enabled */
132
429ccf05 133#define LCD_ESCAPE_LEN 24 /* max chars for LCD escape command */
7005b584
WT		 134#define LCD_ESCAPE_CHAR 27 /* use char 27 for escape command */
135
136/* macros to simplify use of the parallel port */
137#define r_ctr(x) (parport_read_control((x)->port))
138#define r_dtr(x) (parport_read_data((x)->port))
139#define r_str(x) (parport_read_status((x)->port))
698b1515
WT		 140#define w_ctr(x, y) do { parport_write_control((x)->port, (y)); } while (0)
141#define w_dtr(x, y) do { parport_write_data((x)->port, (y)); } while (0)
7005b584
WT		 142
143/* this defines which bits are to be used and which ones to be ignored */
429ccf05
HH		 144/* logical or of the output bits involved in the scan matrix */
145static __u8 scan_mask_o;
146/* logical or of the input bits involved in the scan matrix */
147static __u8 scan_mask_i;
7005b584 148
698b1515 149typedef __u64 pmask_t;
7005b584
WT		 150
151enum input_type {
698b1515
WT		 152 INPUT_TYPE_STD,
153 INPUT_TYPE_KBD,
7005b584
WT		 154};
155
156enum input_state {
698b1515
WT		 157 INPUT_ST_LOW,
158 INPUT_ST_RISING,
159 INPUT_ST_HIGH,
160 INPUT_ST_FALLING,
7005b584
WT		 161};
162
163struct logical_input {
698b1515
WT		 164 struct list_head list;
165 pmask_t mask;
166 pmask_t value;
167 enum input_type type;
168 enum input_state state;
169 __u8 rise_time, fall_time;
170 __u8 rise_timer, fall_timer, high_timer;
171
172 union {
429ccf05 173 struct { /* valid when type == INPUT_TYPE_STD */
698b1515
WT		 174 void (*press_fct) (int);
175 void (*release_fct) (int);
176 int press_data;
177 int release_data;
178 } std;
429ccf05
HH		 179 struct { /* valid when type == INPUT_TYPE_KBD */
180 /* strings can be non null-terminated */
698b1515
WT		 181 char press_str[sizeof(void *) + sizeof(int)];
182 char repeat_str[sizeof(void *) + sizeof(int)];
183 char release_str[sizeof(void *) + sizeof(int)];
184 } kbd;
185 } u;
7005b584
WT		 186};
187
698b1515 188LIST_HEAD(logical_inputs); /* list of all defined logical inputs */
7005b584
WT		 189
190/* physical contacts history
191 * Physical contacts are a 45 bits string of 9 groups of 5 bits each.
192 * The 8 lower groups correspond to output bits 0 to 7, and the 9th group
193 * corresponds to the ground.
194 * Within each group, bits are stored in the same order as read on the port :
195 * BAPSE (busy=4, ack=3, paper empty=2, select=1, error=0).
196 * So, each __u64 (or pmask_t) is represented like this :
197 * 0000000000000000000BAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSE
198 * <-----unused------><gnd><d07><d06><d05><d04><d03><d02><d01><d00>
199 */
429ccf05
HH		 200
201/* what has just been read from the I/O ports */
202static pmask_t phys_read;
203/* previous phys_read */
204static pmask_t phys_read_prev;
205/* stabilized phys_read (phys_read|phys_read_prev) */
206static pmask_t phys_curr;
207/* previous phys_curr */
208static pmask_t phys_prev;
209/* 0 means that at least one logical signal needs be computed */
210static char inputs_stable;
7005b584 211
7005b584
WT		 212/* these variables are specific to the keypad */
213static char keypad_buffer[KEYPAD_BUFFER];
698b1515
WT		 214static int keypad_buflen;
215static int keypad_start;
216static char keypressed;
7005b584 217static wait_queue_head_t keypad_read_wait;
7005b584
WT		 218
219/* lcd-specific variables */
429ccf05
HH		 220
221/* contains the LCD config state */
222static unsigned long int lcd_flags;
223/* contains the LCD X offset */
224static unsigned long int lcd_addr_x;
225/* contains the LCD Y offset */
226static unsigned long int lcd_addr_y;
227/* current escape sequence, 0 terminated */
228static char lcd_escape[LCD_ESCAPE_LEN + 1];
229/* not in escape state. >=0 = escape cmd len */
230static int lcd_escape_len = -1;
7005b584 231
7005b584
WT		 232/*
233 * Bit masks to convert LCD signals to parallel port outputs.
234 * _d_ are values for data port, _c_ are for control port.
235 * [0] = signal OFF, [1] = signal ON, [2] = mask
236 */
698b1515
WT		 237#define BIT_CLR 0
238#define BIT_SET 1
239#define BIT_MSK 2
7005b584
WT		 240#define BIT_STATES 3
241/*
242 * one entry for each bit on the LCD
243 */
244#define LCD_BIT_E 0
245#define LCD_BIT_RS 1
246#define LCD_BIT_RW 2
247#define LCD_BIT_BL 3
248#define LCD_BIT_CL 4
249#define LCD_BIT_DA 5
250#define LCD_BITS 6
251
252/*
253 * each bit can be either connected to a DATA or CTRL port
254 */
255#define LCD_PORT_C 0
256#define LCD_PORT_D 1
257#define LCD_PORTS 2
258
259static unsigned char lcd_bits[LCD_PORTS][LCD_BITS][BIT_STATES];
260
261/*
262 * LCD protocols
263 */
264#define LCD_PROTO_PARALLEL 0
265#define LCD_PROTO_SERIAL 1
77943d31 266#define LCD_PROTO_TI_DA8XX_LCD 2
7005b584
WT		 267
268/*
269 * LCD character sets
270 */
271#define LCD_CHARSET_NORMAL 0
272#define LCD_CHARSET_KS0074 1
273
274/*
275 * LCD types
276 */
277#define LCD_TYPE_NONE 0
278#define LCD_TYPE_OLD 1
279#define LCD_TYPE_KS0074 2
280#define LCD_TYPE_HANTRONIX 3
281#define LCD_TYPE_NEXCOM 4
282#define LCD_TYPE_CUSTOM 5
283
284/*
285 * keypad types
286 */
287#define KEYPAD_TYPE_NONE 0
288#define KEYPAD_TYPE_OLD 1
289#define KEYPAD_TYPE_NEW 2
290#define KEYPAD_TYPE_NEXCOM 3
291
292/*
293 * panel profiles
294 */
295#define PANEL_PROFILE_CUSTOM 0
296#define PANEL_PROFILE_OLD 1
297#define PANEL_PROFILE_NEW 2
298#define PANEL_PROFILE_HANTRONIX 3
299#define PANEL_PROFILE_NEXCOM 4
300#define PANEL_PROFILE_LARGE 5
301
302/*
303 * Construct custom config from the kernel's configuration
304 */
305#define DEFAULT_PROFILE PANEL_PROFILE_LARGE
306#define DEFAULT_PARPORT 0
307#define DEFAULT_LCD LCD_TYPE_OLD
308#define DEFAULT_KEYPAD KEYPAD_TYPE_OLD
7005b584
WT		 309#define DEFAULT_LCD_WIDTH 40
310#define DEFAULT_LCD_BWIDTH 40
311#define DEFAULT_LCD_HWIDTH 64
312#define DEFAULT_LCD_HEIGHT 2
313#define DEFAULT_LCD_PROTO LCD_PROTO_PARALLEL
314
315#define DEFAULT_LCD_PIN_E PIN_AUTOLF
316#define DEFAULT_LCD_PIN_RS PIN_SELECP
317#define DEFAULT_LCD_PIN_RW PIN_INITP
318#define DEFAULT_LCD_PIN_SCL PIN_STROBE
319#define DEFAULT_LCD_PIN_SDA PIN_D0
320#define DEFAULT_LCD_PIN_BL PIN_NOT_SET
321#define DEFAULT_LCD_CHARSET LCD_CHARSET_NORMAL
322
323#ifdef CONFIG_PANEL_PROFILE
324#undef DEFAULT_PROFILE
325#define DEFAULT_PROFILE CONFIG_PANEL_PROFILE
326#endif
327
328#ifdef CONFIG_PANEL_PARPORT
329#undef DEFAULT_PARPORT
330#define DEFAULT_PARPORT CONFIG_PANEL_PARPORT
331#endif
332
698b1515 333#if DEFAULT_PROFILE == 0 /* custom */
7005b584
WT		 334#ifdef CONFIG_PANEL_KEYPAD
335#undef DEFAULT_KEYPAD
336#define DEFAULT_KEYPAD CONFIG_PANEL_KEYPAD
337#endif
338
7005b584
WT		 339#ifdef CONFIG_PANEL_LCD
340#undef DEFAULT_LCD
341#define DEFAULT_LCD CONFIG_PANEL_LCD
342#endif
343
344#ifdef CONFIG_PANEL_LCD_WIDTH
345#undef DEFAULT_LCD_WIDTH
346#define DEFAULT_LCD_WIDTH CONFIG_PANEL_LCD_WIDTH
347#endif
348
349#ifdef CONFIG_PANEL_LCD_BWIDTH
350#undef DEFAULT_LCD_BWIDTH
351#define DEFAULT_LCD_BWIDTH CONFIG_PANEL_LCD_BWIDTH
352#endif
353
354#ifdef CONFIG_PANEL_LCD_HWIDTH
355#undef DEFAULT_LCD_HWIDTH
356#define DEFAULT_LCD_HWIDTH CONFIG_PANEL_LCD_HWIDTH
357#endif
358
359#ifdef CONFIG_PANEL_LCD_HEIGHT
360#undef DEFAULT_LCD_HEIGHT
361#define DEFAULT_LCD_HEIGHT CONFIG_PANEL_LCD_HEIGHT
362#endif
363
364#ifdef CONFIG_PANEL_LCD_PROTO
365#undef DEFAULT_LCD_PROTO
366#define DEFAULT_LCD_PROTO CONFIG_PANEL_LCD_PROTO
367#endif
368
369#ifdef CONFIG_PANEL_LCD_PIN_E
370#undef DEFAULT_LCD_PIN_E
371#define DEFAULT_LCD_PIN_E CONFIG_PANEL_LCD_PIN_E
372#endif
373
374#ifdef CONFIG_PANEL_LCD_PIN_RS
375#undef DEFAULT_LCD_PIN_RS
376#define DEFAULT_LCD_PIN_RS CONFIG_PANEL_LCD_PIN_RS
377#endif
378
379#ifdef CONFIG_PANEL_LCD_PIN_RW
380#undef DEFAULT_LCD_PIN_RW
381#define DEFAULT_LCD_PIN_RW CONFIG_PANEL_LCD_PIN_RW
382#endif
383
384#ifdef CONFIG_PANEL_LCD_PIN_SCL
385#undef DEFAULT_LCD_PIN_SCL
386#define DEFAULT_LCD_PIN_SCL CONFIG_PANEL_LCD_PIN_SCL
387#endif
388
389#ifdef CONFIG_PANEL_LCD_PIN_SDA
390#undef DEFAULT_LCD_PIN_SDA
391#define DEFAULT_LCD_PIN_SDA CONFIG_PANEL_LCD_PIN_SDA
392#endif
393
394#ifdef CONFIG_PANEL_LCD_PIN_BL
395#undef DEFAULT_LCD_PIN_BL
396#define DEFAULT_LCD_PIN_BL CONFIG_PANEL_LCD_PIN_BL
397#endif
398
399#ifdef CONFIG_PANEL_LCD_CHARSET
400#undef DEFAULT_LCD_CHARSET
a6a6c908 401#define DEFAULT_LCD_CHARSET CONFIG_PANEL_LCD_CHARSET
7005b584
WT		 402#endif
403
404#endif /* DEFAULT_PROFILE == 0 */
405
406/* global variables */
698b1515
WT		 407static int keypad_open_cnt; /* #times opened */
408static int lcd_open_cnt; /* #times opened */
698b1515 409static struct pardevice *pprt;
7005b584 410
f6d1fcfe
WT		 411static int lcd_initialized;
412static int keypad_initialized;
7005b584 413
698b1515 414static int light_tempo;
7005b584 415
698b1515
WT		 416static char lcd_must_clear;
417static char lcd_left_shift;
418static char init_in_progress;
7005b584 419
698b1515
WT		 420static void (*lcd_write_cmd) (int);
421static void (*lcd_write_data) (int);
422static void (*lcd_clear_fast) (void);
7005b584 423
698b1515 424static DEFINE_SPINLOCK(pprt_lock);
7005b584
WT		 425static struct timer_list scan_timer;
426
63023177 427MODULE_DESCRIPTION("Generic parallel port LCD/Keypad driver");
f6d1fcfe
WT		 428
429static int parport = -1;
698b1515
WT		 430module_param(parport, int, 0000);
431MODULE_PARM_DESC(parport, "Parallel port index (0=lpt1, 1=lpt2, ...)");
f6d1fcfe
WT		 432
433static int lcd_height = -1;
698b1515
WT		 434module_param(lcd_height, int, 0000);
435MODULE_PARM_DESC(lcd_height, "Number of lines on the LCD");
f6d1fcfe
WT		 436
437static int lcd_width = -1;
698b1515
WT		 438module_param(lcd_width, int, 0000);
439MODULE_PARM_DESC(lcd_width, "Number of columns on the LCD");
f6d1fcfe
WT		 440
441static int lcd_bwidth = -1; /* internal buffer width (usually 40) */
698b1515
WT		 442module_param(lcd_bwidth, int, 0000);
443MODULE_PARM_DESC(lcd_bwidth, "Internal LCD line width (40)");
f6d1fcfe
WT		 444
445static int lcd_hwidth = -1; /* hardware buffer width (usually 64) */
698b1515
WT		 446module_param(lcd_hwidth, int, 0000);
447MODULE_PARM_DESC(lcd_hwidth, "LCD line hardware address (64)");
f6d1fcfe
WT		 448
449static int lcd_enabled = -1;
698b1515
WT		 450module_param(lcd_enabled, int, 0000);
451MODULE_PARM_DESC(lcd_enabled, "Deprecated option, use lcd_type instead");
f6d1fcfe
WT		 452
453static int keypad_enabled = -1;
698b1515
WT		 454module_param(keypad_enabled, int, 0000);
455MODULE_PARM_DESC(keypad_enabled, "Deprecated option, use keypad_type instead");
f6d1fcfe
WT		 456
457static int lcd_type = -1;
698b1515
WT		 458module_param(lcd_type, int, 0000);
459MODULE_PARM_DESC(lcd_type,
429ccf05
HH		 460 "LCD type: 0=none, 1=old //, 2=serial ks0074, "
461 "3=hantronix //, 4=nexcom //, 5=compiled-in");
f6d1fcfe
WT		 462
463static int lcd_proto = -1;
698b1515 464module_param(lcd_proto, int, 0000);
429ccf05
HH		 465MODULE_PARM_DESC(lcd_proto,
466 "LCD communication: 0=parallel (//), 1=serial,"
77943d31 467 "2=TI LCD Interface");
f6d1fcfe
WT		 468
469static int lcd_charset = -1;
698b1515
WT		 470module_param(lcd_charset, int, 0000);
471MODULE_PARM_DESC(lcd_charset, "LCD character set: 0=standard, 1=KS0074");
f6d1fcfe
WT		 472
473static int keypad_type = -1;
698b1515
WT		 474module_param(keypad_type, int, 0000);
475MODULE_PARM_DESC(keypad_type,
429ccf05
HH		 476 "Keypad type: 0=none, 1=old 6 keys, 2=new 6+1 keys, "
477 "3=nexcom 4 keys");
f6d1fcfe 478
f6d1fcfe 479static int profile = DEFAULT_PROFILE;
698b1515
WT		 480module_param(profile, int, 0000);
481MODULE_PARM_DESC(profile,
429ccf05
HH		 482 "1=16x2 old kp; 2=serial 16x2, new kp; 3=16x2 hantronix; "
483 "4=16x2 nexcom; default=40x2, old kp");
698b1515 484
f6d1fcfe
WT		 485/*
486 * These are the parallel port pins the LCD control signals are connected to.
487 * Set this to 0 if the signal is not used. Set it to its opposite value
488 * (negative) if the signal is negated. -MAXINT is used to indicate that the
489 * pin has not been explicitly specified.
490 *
63023177 491 * WARNING! no check will be performed about collisions with keypad !
f6d1fcfe
WT		 492 */
493
494static int lcd_e_pin = PIN_NOT_SET;
698b1515
WT		 495module_param(lcd_e_pin, int, 0000);
496MODULE_PARM_DESC(lcd_e_pin,
429ccf05
HH		 497 "# of the // port pin connected to LCD 'E' signal, "
498 "with polarity (-17..17)");
f6d1fcfe
WT		 499
500static int lcd_rs_pin = PIN_NOT_SET;
698b1515
WT		 501module_param(lcd_rs_pin, int, 0000);
502MODULE_PARM_DESC(lcd_rs_pin,
429ccf05
HH		 503 "# of the // port pin connected to LCD 'RS' signal, "
504 "with polarity (-17..17)");
f6d1fcfe
WT		 505
506static int lcd_rw_pin = PIN_NOT_SET;
698b1515
WT		 507module_param(lcd_rw_pin, int, 0000);
508MODULE_PARM_DESC(lcd_rw_pin,
429ccf05
HH		 509 "# of the // port pin connected to LCD 'RW' signal, "
510 "with polarity (-17..17)");
f6d1fcfe
WT		 511
512static int lcd_bl_pin = PIN_NOT_SET;
698b1515
WT		 513module_param(lcd_bl_pin, int, 0000);
514MODULE_PARM_DESC(lcd_bl_pin,
429ccf05
HH		 515 "# of the // port pin connected to LCD backlight, "
516 "with polarity (-17..17)");
f6d1fcfe
WT		 517
518static int lcd_da_pin = PIN_NOT_SET;
698b1515
WT		 519module_param(lcd_da_pin, int, 0000);
520MODULE_PARM_DESC(lcd_da_pin,
429ccf05
HH		 521 "# of the // port pin connected to serial LCD 'SDA' "
522 "signal, with polarity (-17..17)");
f6d1fcfe
WT		 523
524static int lcd_cl_pin = PIN_NOT_SET;
698b1515
WT		 525module_param(lcd_cl_pin, int, 0000);
526MODULE_PARM_DESC(lcd_cl_pin,
429ccf05
HH		 527 "# of the // port pin connected to serial LCD 'SCL' "
528 "signal, with polarity (-17..17)");
7005b584 529
698b1515 530static unsigned char *lcd_char_conv;
7005b584
WT		 531
532/* for some LCD drivers (ks0074) we need a charset conversion table. */
533static unsigned char lcd_char_conv_ks0074[256] = {
698b1515
WT		 534 /* 0|8 1|9 2|A 3|B 4|C 5|D 6|E 7|F */
535 /* 0x00 */ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
536 /* 0x08 */ 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
537 /* 0x10 */ 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
538 /* 0x18 */ 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
539 /* 0x20 */ 0x20, 0x21, 0x22, 0x23, 0xa2, 0x25, 0x26, 0x27,
540 /* 0x28 */ 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
541 /* 0x30 */ 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
542 /* 0x38 */ 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
543 /* 0x40 */ 0xa0, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
544 /* 0x48 */ 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
545 /* 0x50 */ 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
546 /* 0x58 */ 0x58, 0x59, 0x5a, 0xfa, 0xfb, 0xfc, 0x1d, 0xc4,
547 /* 0x60 */ 0x96, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
548 /* 0x68 */ 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
549 /* 0x70 */ 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
550 /* 0x78 */ 0x78, 0x79, 0x7a, 0xfd, 0xfe, 0xff, 0xce, 0x20,
551 /* 0x80 */ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
552 /* 0x88 */ 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
553 /* 0x90 */ 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
554 /* 0x98 */ 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
555 /* 0xA0 */ 0x20, 0x40, 0xb1, 0xa1, 0x24, 0xa3, 0xfe, 0x5f,
556 /* 0xA8 */ 0x22, 0xc8, 0x61, 0x14, 0x97, 0x2d, 0xad, 0x96,
557 /* 0xB0 */ 0x80, 0x8c, 0x82, 0x83, 0x27, 0x8f, 0x86, 0xdd,
558 /* 0xB8 */ 0x2c, 0x81, 0x6f, 0x15, 0x8b, 0x8a, 0x84, 0x60,
559 /* 0xC0 */ 0xe2, 0xe2, 0xe2, 0x5b, 0x5b, 0xae, 0xbc, 0xa9,
560 /* 0xC8 */ 0xc5, 0xbf, 0xc6, 0xf1, 0xe3, 0xe3, 0xe3, 0xe3,
561 /* 0xD0 */ 0x44, 0x5d, 0xa8, 0xe4, 0xec, 0xec, 0x5c, 0x78,
562 /* 0xD8 */ 0xab, 0xa6, 0xe5, 0x5e, 0x5e, 0xe6, 0xaa, 0xbe,
563 /* 0xE0 */ 0x7f, 0xe7, 0xaf, 0x7b, 0x7b, 0xaf, 0xbd, 0xc8,
564 /* 0xE8 */ 0xa4, 0xa5, 0xc7, 0xf6, 0xa7, 0xe8, 0x69, 0x69,
565 /* 0xF0 */ 0xed, 0x7d, 0xa8, 0xe4, 0xec, 0x5c, 0x5c, 0x25,
566 /* 0xF8 */ 0xac, 0xa6, 0xea, 0xef, 0x7e, 0xeb, 0xb2, 0x79,
7005b584
WT		 567};
568
569char old_keypad_profile[][4][9] = {
698b1515
WT		 570 {"S0", "Left\n", "Left\n", ""},
571 {"S1", "Down\n", "Down\n", ""},
572 {"S2", "Up\n", "Up\n", ""},
573 {"S3", "Right\n", "Right\n", ""},
574 {"S4", "Esc\n", "Esc\n", ""},
575 {"S5", "Ret\n", "Ret\n", ""},
576 {"", "", "", ""}
7005b584
WT		 577};
578
579/* signals, press, repeat, release */
580char new_keypad_profile[][4][9] = {
698b1515
WT		 581 {"S0", "Left\n", "Left\n", ""},
582 {"S1", "Down\n", "Down\n", ""},
583 {"S2", "Up\n", "Up\n", ""},
584 {"S3", "Right\n", "Right\n", ""},
585 {"S4s5", "", "Esc\n", "Esc\n"},
586 {"s4S5", "", "Ret\n", "Ret\n"},
587 {"S4S5", "Help\n", "", ""},
588 /* add new signals above this line */
589 {"", "", "", ""}
7005b584
WT		 590};
591
592/* signals, press, repeat, release */
593char nexcom_keypad_profile[][4][9] = {
698b1515
WT		 594 {"a-p-e-", "Down\n", "Down\n", ""},
595 {"a-p-E-", "Ret\n", "Ret\n", ""},
596 {"a-P-E-", "Esc\n", "Esc\n", ""},
597 {"a-P-e-", "Up\n", "Up\n", ""},
598 /* add new signals above this line */
599 {"", "", "", ""}
7005b584
WT		 600};
601
602static char (*keypad_profile)[4][9] = old_keypad_profile;
603
604/* FIXME: this should be converted to a bit array containing signals states */
605static struct {
429ccf05
HH		 606 unsigned char e; /* parallel LCD E (data latch on falling edge) */
607 unsigned char rs; /* parallel LCD RS (0 = cmd, 1 = data) */
608 unsigned char rw; /* parallel LCD R/W (0 = W, 1 = R) */
609 unsigned char bl; /* parallel LCD backlight (0 = off, 1 = on) */
610 unsigned char cl; /* serial LCD clock (latch on rising edge) */
611 unsigned char da; /* serial LCD data */
7005b584
WT		 612} bits;
613
614static void init_scan_timer(void);
615
616/* sets data port bits according to current signals values */
698b1515
WT		 617static int set_data_bits(void)
618{
619 int val, bit;
620
621 val = r_dtr(pprt);
622 for (bit = 0; bit < LCD_BITS; bit++)
623 val &= lcd_bits[LCD_PORT_D][bit][BIT_MSK];
624
625 val |= lcd_bits[LCD_PORT_D][LCD_BIT_E][bits.e]
626 | lcd_bits[LCD_PORT_D][LCD_BIT_RS][bits.rs]
627 | lcd_bits[LCD_PORT_D][LCD_BIT_RW][bits.rw]
628 | lcd_bits[LCD_PORT_D][LCD_BIT_BL][bits.bl]
629 | lcd_bits[LCD_PORT_D][LCD_BIT_CL][bits.cl]
630 | lcd_bits[LCD_PORT_D][LCD_BIT_DA][bits.da];
631
632 w_dtr(pprt, val);
633 return val;
7005b584
WT		 634}
635
636/* sets ctrl port bits according to current signals values */
698b1515
WT		 637static int set_ctrl_bits(void)
638{
639 int val, bit;
640
641 val = r_ctr(pprt);
642 for (bit = 0; bit < LCD_BITS; bit++)
643 val &= lcd_bits[LCD_PORT_C][bit][BIT_MSK];
644
645 val |= lcd_bits[LCD_PORT_C][LCD_BIT_E][bits.e]
646 | lcd_bits[LCD_PORT_C][LCD_BIT_RS][bits.rs]
647 | lcd_bits[LCD_PORT_C][LCD_BIT_RW][bits.rw]
648 | lcd_bits[LCD_PORT_C][LCD_BIT_BL][bits.bl]
649 | lcd_bits[LCD_PORT_C][LCD_BIT_CL][bits.cl]
650 | lcd_bits[LCD_PORT_C][LCD_BIT_DA][bits.da];
651
652 w_ctr(pprt, val);
653 return val;
7005b584
WT		 654}
655
656/* sets ctrl & data port bits according to current signals values */
6136ac86 657static void panel_set_bits(void)
698b1515
WT		 658{
659 set_data_bits();
660 set_ctrl_bits();
7005b584
WT		 661}
662
663/*
664 * Converts a parallel port pin (from -25 to 25) to data and control ports
665 * masks, and data and control port bits. The signal will be considered
666 * unconnected if it's on pin 0 or an invalid pin (<-25 or >25).
667 *
668 * Result will be used this way :
669 * out(dport, in(dport) & d_val[2] | d_val[signal_state])
670 * out(cport, in(cport) & c_val[2] | c_val[signal_state])
671 */
698b1515
WT		 672void pin_to_bits(int pin, unsigned char *d_val, unsigned char *c_val)
673{
674 int d_bit, c_bit, inv;
675
676 d_val[0] = c_val[0] = d_val[1] = c_val[1] = 0;
677 d_val[2] = c_val[2] = 0xFF;
678
679 if (pin == 0)
680 return;
681
682 inv = (pin < 0);
683 if (inv)
684 pin = -pin;
685
686 d_bit = c_bit = 0;
687
688 switch (pin) {
689 case PIN_STROBE: /* strobe, inverted */
690 c_bit = PNL_PSTROBE;
691 inv = !inv;
692 break;
693 case PIN_D0...PIN_D7: /* D0 - D7 = 2 - 9 */
694 d_bit = 1 << (pin - 2);
695 break;
696 case PIN_AUTOLF: /* autofeed, inverted */
697 c_bit = PNL_PAUTOLF;
698 inv = !inv;
699 break;
429ccf05 700 case PIN_INITP: /* init, direct */
698b1515
WT		 701 c_bit = PNL_PINITP;
702 break;
703 case PIN_SELECP: /* select_in, inverted */
704 c_bit = PNL_PSELECP;
705 inv = !inv;
706 break;
707 default: /* unknown pin, ignore */
708 break;
709 }
710
711 if (c_bit) {
712 c_val[2] &= ~c_bit;
713 c_val[!inv] = c_bit;
714 } else if (d_bit) {
715 d_val[2] &= ~d_bit;
716 d_val[!inv] = d_bit;
717 }
7005b584
WT		 718}
719
720/* sleeps that many milliseconds with a reschedule */
698b1515
WT		 721static void long_sleep(int ms)
722{
7005b584 723
698b1515
WT		 724 if (in_interrupt())
725 mdelay(ms);
726 else {
727 current->state = TASK_INTERRUPTIBLE;
728 schedule_timeout((ms * HZ + 999) / 1000);
729 }
730}
7005b584 731
429ccf05
HH		 732/* send a serial byte to the LCD panel. The caller is responsible for locking
733 if needed. */
698b1515
WT		 734static void lcd_send_serial(int byte)
735{
736 int bit;
737
738 /* the data bit is set on D0, and the clock on STROBE.
429ccf05 739 * LCD reads D0 on STROBE's rising edge. */
698b1515
WT		 740 for (bit = 0; bit < 8; bit++) {
741 bits.cl = BIT_CLR; /* CLK low */
6136ac86 742 panel_set_bits();
698b1515 743 bits.da = byte & 1;
6136ac86 744 panel_set_bits();
429ccf05 745 udelay(2); /* maintain the data during 2 us before CLK up */
698b1515 746 bits.cl = BIT_SET; /* CLK high */
6136ac86 747 panel_set_bits();
429ccf05 748 udelay(1); /* maintain the strobe during 1 us */
698b1515
WT		 749 byte >>= 1;
750 }
7005b584
WT		 751}
752
753/* turn the backlight on or off */
698b1515
WT		 754static void lcd_backlight(int on)
755{
756 if (lcd_bl_pin == PIN_NONE)
757 return;
758
759 /* The backlight is activated by seting the AUTOFEED line to +5V */
760 spin_lock(&pprt_lock);
761 bits.bl = on;
6136ac86 762 panel_set_bits();
698b1515 763 spin_unlock(&pprt_lock);
7005b584
WT		 764}
765
766/* send a command to the LCD panel in serial mode */
698b1515
WT		 767static void lcd_write_cmd_s(int cmd)
768{
769 spin_lock(&pprt_lock);
770 lcd_send_serial(0x1F); /* R/W=W, RS=0 */
771 lcd_send_serial(cmd & 0x0F);
772 lcd_send_serial((cmd >> 4) & 0x0F);
773 udelay(40); /* the shortest command takes at least 40 us */
774 spin_unlock(&pprt_lock);
7005b584
WT		 775}
776
777/* send data to the LCD panel in serial mode */
698b1515
WT		 778static void lcd_write_data_s(int data)
779{
780 spin_lock(&pprt_lock);
781 lcd_send_serial(0x5F); /* R/W=W, RS=1 */
782 lcd_send_serial(data & 0x0F);
783 lcd_send_serial((data >> 4) & 0x0F);
784 udelay(40); /* the shortest data takes at least 40 us */
785 spin_unlock(&pprt_lock);
7005b584
WT		 786}
787
788/* send a command to the LCD panel in 8 bits parallel mode */
698b1515
WT		 789static void lcd_write_cmd_p8(int cmd)
790{
791 spin_lock(&pprt_lock);
792 /* present the data to the data port */
793 w_dtr(pprt, cmd);
429ccf05 794 udelay(20); /* maintain the data during 20 us before the strobe */
7005b584 795
698b1515
WT		 796 bits.e = BIT_SET;
797 bits.rs = BIT_CLR;
798 bits.rw = BIT_CLR;
799 set_ctrl_bits();
7005b584 800
429ccf05 801 udelay(40); /* maintain the strobe during 40 us */
7005b584 802
698b1515
WT		 803 bits.e = BIT_CLR;
804 set_ctrl_bits();
7005b584 805
429ccf05 806 udelay(120); /* the shortest command takes at least 120 us */
698b1515 807 spin_unlock(&pprt_lock);
7005b584
WT		 808}
809
810/* send data to the LCD panel in 8 bits parallel mode */
698b1515
WT		 811static void lcd_write_data_p8(int data)
812{
813 spin_lock(&pprt_lock);
814 /* present the data to the data port */
815 w_dtr(pprt, data);
429ccf05 816 udelay(20); /* maintain the data during 20 us before the strobe */
7005b584 817
698b1515
WT		 818 bits.e = BIT_SET;
819 bits.rs = BIT_SET;
820 bits.rw = BIT_CLR;
821 set_ctrl_bits();
7005b584 822
429ccf05 823 udelay(40); /* maintain the strobe during 40 us */
7005b584 824
698b1515
WT		 825 bits.e = BIT_CLR;
826 set_ctrl_bits();
7005b584 827
429ccf05 828 udelay(45); /* the shortest data takes at least 45 us */
698b1515 829 spin_unlock(&pprt_lock);
7005b584
WT		 830}
831
77943d31
SR		 832/* send a command to the TI LCD panel */
833static void lcd_write_cmd_tilcd(int cmd)
834{
835 spin_lock(&pprt_lock);
836 /* present the data to the control port */
837 w_ctr(pprt, cmd);
838 udelay(60);
839 spin_unlock(&pprt_lock);
840}
841
842/* send data to the TI LCD panel */
843static void lcd_write_data_tilcd(int data)
844{
845 spin_lock(&pprt_lock);
846 /* present the data to the data port */
847 w_dtr(pprt, data);
848 udelay(60);
849 spin_unlock(&pprt_lock);
850}
851
698b1515
WT		 852static void lcd_gotoxy(void)
853{
854 lcd_write_cmd(0x80 /* set DDRAM address */
855 | (lcd_addr_y ? lcd_hwidth : 0)
429ccf05
HH		 856 /* we force the cursor to stay at the end of the
857 line if it wants to go farther */
698b1515
WT		 858 | ((lcd_addr_x < lcd_bwidth) ? lcd_addr_x &
859 (lcd_hwidth - 1) : lcd_bwidth - 1));
7005b584
WT		 860}
861
698b1515
WT		 862static void lcd_print(char c)
863{
864 if (lcd_addr_x < lcd_bwidth) {
865 if (lcd_char_conv != NULL)
866 c = lcd_char_conv[(unsigned char)c];
867 lcd_write_data(c);
868 lcd_addr_x++;
869 }
870 /* prevents the cursor from wrapping onto the next line */
871 if (lcd_addr_x == lcd_bwidth)
872 lcd_gotoxy();
7005b584
WT		 873}
874
875/* fills the display with spaces and resets X/Y */
698b1515
WT		 876static void lcd_clear_fast_s(void)
877{
878 int pos;
879 lcd_addr_x = lcd_addr_y = 0;
880 lcd_gotoxy();
881
882 spin_lock(&pprt_lock);
883 for (pos = 0; pos < lcd_height * lcd_hwidth; pos++) {
884 lcd_send_serial(0x5F); /* R/W=W, RS=1 */
885 lcd_send_serial(' ' & 0x0F);
886 lcd_send_serial((' ' >> 4) & 0x0F);
887 udelay(40); /* the shortest data takes at least 40 us */
888 }
889 spin_unlock(&pprt_lock);
890
891 lcd_addr_x = lcd_addr_y = 0;
892 lcd_gotoxy();
7005b584
WT		 893}
894
895/* fills the display with spaces and resets X/Y */
698b1515
WT		 896static void lcd_clear_fast_p8(void)
897{
898 int pos;
899 lcd_addr_x = lcd_addr_y = 0;
900 lcd_gotoxy();
7005b584 901
698b1515
WT		 902 spin_lock(&pprt_lock);
903 for (pos = 0; pos < lcd_height * lcd_hwidth; pos++) {
904 /* present the data to the data port */
905 w_dtr(pprt, ' ');
429ccf05
HH		 906
907 /* maintain the data during 20 us before the strobe */
908 udelay(20);
7005b584 909
698b1515
WT		 910 bits.e = BIT_SET;
911 bits.rs = BIT_SET;
912 bits.rw = BIT_CLR;
913 set_ctrl_bits();
7005b584 914
429ccf05
HH		 915 /* maintain the strobe during 40 us */
916 udelay(40);
7005b584 917
698b1515
WT		 918 bits.e = BIT_CLR;
919 set_ctrl_bits();
7005b584 920
429ccf05
HH		 921 /* the shortest data takes at least 45 us */
922 udelay(45);
698b1515
WT		 923 }
924 spin_unlock(&pprt_lock);
7005b584 925
698b1515
WT		 926 lcd_addr_x = lcd_addr_y = 0;
927 lcd_gotoxy();
7005b584
WT		 928}
929
77943d31
SR		 930/* fills the display with spaces and resets X/Y */
931static void lcd_clear_fast_tilcd(void)
932{
933 int pos;
934 lcd_addr_x = lcd_addr_y = 0;
935 lcd_gotoxy();
936
937 spin_lock(&pprt_lock);
938 for (pos = 0; pos < lcd_height * lcd_hwidth; pos++) {
939 /* present the data to the data port */
940 w_dtr(pprt, ' ');
941 udelay(60);
942 }
943
944 spin_unlock(&pprt_lock);
945
946 lcd_addr_x = lcd_addr_y = 0;
947 lcd_gotoxy();
948}
949
7005b584 950/* clears the display and resets X/Y */
698b1515
WT		 951static void lcd_clear_display(void)
952{
953 lcd_write_cmd(0x01); /* clear display */
954 lcd_addr_x = lcd_addr_y = 0;
955 /* we must wait a few milliseconds (15) */
956 long_sleep(15);
7005b584
WT		 957}
958
698b1515
WT		 959static void lcd_init_display(void)
960{
7005b584 961
698b1515
WT		 962 lcd_flags = ((lcd_height > 1) ? LCD_FLAG_N : 0)
963 | LCD_FLAG_D | LCD_FLAG_C | LCD_FLAG_B;
7005b584 964
698b1515 965 long_sleep(20); /* wait 20 ms after power-up for the paranoid */
7005b584 966
698b1515
WT		 967 lcd_write_cmd(0x30); /* 8bits, 1 line, small fonts */
968 long_sleep(10);
969 lcd_write_cmd(0x30); /* 8bits, 1 line, small fonts */
970 long_sleep(10);
971 lcd_write_cmd(0x30); /* 8bits, 1 line, small fonts */
972 long_sleep(10);
7005b584 973
698b1515
WT		 974 lcd_write_cmd(0x30 /* set font height and lines number */
975 | ((lcd_flags & LCD_FLAG_F) ? 4 : 0)
976 | ((lcd_flags & LCD_FLAG_N) ? 8 : 0)
977 );
978 long_sleep(10);
7005b584 979
698b1515
WT		 980 lcd_write_cmd(0x08); /* display off, cursor off, blink off */
981 long_sleep(10);
7005b584 982
698b1515
WT		 983 lcd_write_cmd(0x08 /* set display mode */
984 | ((lcd_flags & LCD_FLAG_D) ? 4 : 0)
985 | ((lcd_flags & LCD_FLAG_C) ? 2 : 0)
986 | ((lcd_flags & LCD_FLAG_B) ? 1 : 0)
987 );
7005b584 988
698b1515 989 lcd_backlight((lcd_flags & LCD_FLAG_L) ? 1 : 0);
7005b584 990
698b1515 991 long_sleep(10);
7005b584 992
429ccf05
HH		 993 /* entry mode set : increment, cursor shifting */
994 lcd_write_cmd(0x06);
7005b584 995
698b1515 996 lcd_clear_display();
7005b584
WT		 997}
998
999/*
1000 * These are the file operation function for user access to /dev/lcd
1001 * This function can also be called from inside the kernel, by
1002 * setting file and ppos to NULL.
1003 *
1004 */
1005
429ccf05
HH		 1006static inline int handle_lcd_special_code(void)
1007{
1008 /* LCD special codes */
1009
1010 int processed = 0;
1011
1012 char *esc = lcd_escape + 2;
1013 int oldflags = lcd_flags;
1014
1015 /* check for display mode flags */
1016 switch (*esc) {
1017 case 'D': /* Display ON */
1018 lcd_flags |= LCD_FLAG_D;
1019 processed = 1;
1020 break;
1021 case 'd': /* Display OFF */
1022 lcd_flags &= ~LCD_FLAG_D;
1023 processed = 1;
1024 break;
1025 case 'C': /* Cursor ON */
1026 lcd_flags |= LCD_FLAG_C;
1027 processed = 1;
1028 break;
1029 case 'c': /* Cursor OFF */
1030 lcd_flags &= ~LCD_FLAG_C;
1031 processed = 1;
1032 break;
1033 case 'B': /* Blink ON */
1034 lcd_flags |= LCD_FLAG_B;
1035 processed = 1;
1036 break;
1037 case 'b': /* Blink OFF */
1038 lcd_flags &= ~LCD_FLAG_B;
1039 processed = 1;
1040 break;
1041 case '+': /* Back light ON */
1042 lcd_flags |= LCD_FLAG_L;
1043 processed = 1;
1044 break;
1045 case '-': /* Back light OFF */
1046 lcd_flags &= ~LCD_FLAG_L;
1047 processed = 1;
1048 break;
1049 case '*':
1050 /* flash back light using the keypad timer */
1051 if (scan_timer.function != NULL) {
1052 if (light_tempo == 0 && ((lcd_flags & LCD_FLAG_L) == 0))
1053 lcd_backlight(1);
1054 light_tempo = FLASH_LIGHT_TEMPO;
1055 }
1056 processed = 1;
1057 break;
1058 case 'f': /* Small Font */
1059 lcd_flags &= ~LCD_FLAG_F;
1060 processed = 1;
1061 break;
1062 case 'F': /* Large Font */
1063 lcd_flags |= LCD_FLAG_F;
1064 processed = 1;
1065 break;
1066 case 'n': /* One Line */
1067 lcd_flags &= ~LCD_FLAG_N;
1068 processed = 1;
1069 break;
1070 case 'N': /* Two Lines */
1071 lcd_flags |= LCD_FLAG_N;
1072 break;
1073 case 'l': /* Shift Cursor Left */
1074 if (lcd_addr_x > 0) {
1075 /* back one char if not at end of line */
1076 if (lcd_addr_x < lcd_bwidth)
1077 lcd_write_cmd(0x10);
1078 lcd_addr_x--;
1079 }
1080 processed = 1;
1081 break;
1082 case 'r': /* shift cursor right */
1083 if (lcd_addr_x < lcd_width) {
1084 /* allow the cursor to pass the end of the line */
1085 if (lcd_addr_x <
1086 (lcd_bwidth - 1))
1087 lcd_write_cmd(0x14);
1088 lcd_addr_x++;
1089 }
1090 processed = 1;
1091 break;
1092 case 'L': /* shift display left */
1093 lcd_left_shift++;
1094 lcd_write_cmd(0x18);
1095 processed = 1;
1096 break;
1097 case 'R': /* shift display right */
1098 lcd_left_shift--;
1099 lcd_write_cmd(0x1C);
1100 processed = 1;
1101 break;
1102 case 'k': { /* kill end of line */
1103 int x;
1104 for (x = lcd_addr_x; x < lcd_bwidth; x++)
1105 lcd_write_data(' ');
1106
1107 /* restore cursor position */
1108 lcd_gotoxy();
1109 processed = 1;
1110 break;
1111 }
1112 case 'I': /* reinitialize display */
1113 lcd_init_display();
1114 lcd_left_shift = 0;
1115 processed = 1;
1116 break;
1117 case 'G': {
1118 /* Generator : LGcxxxxx...xx; must have <c> between '0'
1119 * and '7', representing the numerical ASCII code of the
1120 * redefined character, and <xx...xx> a sequence of 16
1121 * hex digits representing 8 bytes for each character.
1122 * Most LCDs will only use 5 lower bits of the 7 first
1123 * bytes.
1124 */
1125
1126 unsigned char cgbytes[8];
1127 unsigned char cgaddr;
1128 int cgoffset;
1129 int shift;
1130 char value;
1131 int addr;
1132
1133 if (strchr(esc, ';') == NULL)
1134 break;
1135
1136 esc++;
1137
1138 cgaddr = *(esc++) - '0';
1139 if (cgaddr > 7) {
1140 processed = 1;
1141 break;
1142 }
1143
1144 cgoffset = 0;
1145 shift = 0;
1146 value = 0;
1147 while (*esc && cgoffset < 8) {
1148 shift ^= 4;
1149 if (*esc >= '0' && *esc <= '9')
1150 value |= (*esc - '0') << shift;
1151 else if (*esc >= 'A' && *esc <= 'Z')
1152 value |= (*esc - 'A' + 10) << shift;
1153 else if (*esc >= 'a' && *esc <= 'z')
1154 value |= (*esc - 'a' + 10) << shift;
1155 else {
1156 esc++;
1157 continue;
1158 }
1159
1160 if (shift == 0) {
1161 cgbytes[cgoffset++] = value;
1162 value = 0;
1163 }
1164
1165 esc++;
1166 }
1167
1168 lcd_write_cmd(0x40 | (cgaddr * 8));
1169 for (addr = 0; addr < cgoffset; addr++)
1170 lcd_write_data(cgbytes[addr]);
1171
1172 /* ensures that we stop writing to CGRAM */
1173 lcd_gotoxy();
1174 processed = 1;
1175 break;
1176 }
1177 case 'x': /* gotoxy : LxXXX[yYYY]; */
1178 case 'y': /* gotoxy : LyYYY[xXXX]; */
1179 if (strchr(esc, ';') == NULL)
1180 break;
1181
1182 while (*esc) {
d85170ed
AS		 1183 char *endp;
1184
429ccf05
HH		 1185 if (*esc == 'x') {
1186 esc++;
d85170ed
AS		 1187 lcd_addr_x = simple_strtoul(esc, &endp, 10);
1188 esc = endp;
429ccf05
HH		 1189 } else if (*esc == 'y') {
1190 esc++;
d85170ed
AS		 1191 lcd_addr_y = simple_strtoul(esc, &endp, 10);
1192 esc = endp;
429ccf05
HH		 1193 } else
1194 break;
1195 }
1196
1197 lcd_gotoxy();
1198 processed = 1;
1199 break;
1200 }
1201
1202 /* Check wether one flag was changed */
1203 if (oldflags != lcd_flags) {
1204 /* check whether one of B,C,D flags were changed */
1205 if ((oldflags ^ lcd_flags) &
1206 (LCD_FLAG_B | LCD_FLAG_C | LCD_FLAG_D))
1207 /* set display mode */
1208 lcd_write_cmd(0x08
1209 | ((lcd_flags & LCD_FLAG_D) ? 4 : 0)
1210 | ((lcd_flags & LCD_FLAG_C) ? 2 : 0)
1211 | ((lcd_flags & LCD_FLAG_B) ? 1 : 0));
1212 /* check whether one of F,N flags was changed */
1213 else if ((oldflags ^ lcd_flags) & (LCD_FLAG_F | LCD_FLAG_N))
1214 lcd_write_cmd(0x30
1215 | ((lcd_flags & LCD_FLAG_F) ? 4 : 0)
1216 | ((lcd_flags & LCD_FLAG_N) ? 8 : 0));
1217 /* check wether L flag was changed */
1218 else if ((oldflags ^ lcd_flags) & (LCD_FLAG_L)) {
1219 if (lcd_flags & (LCD_FLAG_L))
1220 lcd_backlight(1);
1221 else if (light_tempo == 0)
1222 /* switch off the light only when the tempo
1223 lighting is gone */
1224 lcd_backlight(0);
1225 }
1226 }
1227
1228 return processed;
1229}
1230
698b1515
WT		 1231static ssize_t lcd_write(struct file *file,
1232 const char *buf, size_t count, loff_t *ppos)
1233{
698b1515
WT		 1234 const char *tmp = buf;
1235 char c;
1236
1237 for (; count-- > 0; (ppos ? (*ppos)++ : 0), ++tmp) {
1238 if (!in_interrupt() && (((count + 1) & 0x1f) == 0))
429ccf05
HH		 1239 /* let's be a little nice with other processes
1240 that need some CPU */
1241 schedule();
698b1515
WT		 1242
1243 if (ppos == NULL && file == NULL)
429ccf05
HH		 1244 /* let's not use get_user() from the kernel ! */
1245 c = *tmp;
698b1515
WT		 1246 else if (get_user(c, tmp))
1247 return -EFAULT;
1248
1249 /* first, we'll test if we're in escape mode */
429ccf05
HH		 1250 if ((c != '\n') && lcd_escape_len >= 0) {
1251 /* yes, let's add this char to the buffer */
698b1515
WT		 1252 lcd_escape[lcd_escape_len++] = c;
1253 lcd_escape[lcd_escape_len] = 0;
1254 } else {
429ccf05
HH		 1255 /* aborts any previous escape sequence */
1256 lcd_escape_len = -1;
698b1515
WT		 1257
1258 switch (c) {
429ccf05
HH		 1259 case LCD_ESCAPE_CHAR:
1260 /* start of an escape sequence */
698b1515
WT		 1261 lcd_escape_len = 0;
1262 lcd_escape[lcd_escape_len] = 0;
1263 break;
429ccf05
HH		 1264 case '\b':
1265 /* go back one char and clear it */
698b1515 1266 if (lcd_addr_x > 0) {
429ccf05
HH		 1267 /* check if we're not at the
1268 end of the line */
1269 if (lcd_addr_x < lcd_bwidth)
1270 /* back one char */
1271 lcd_write_cmd(0x10);
698b1515
WT		 1272 lcd_addr_x--;
1273 }
429ccf05
HH		 1274 /* replace with a space */
1275 lcd_write_data(' ');
1276 /* back one char again */
1277 lcd_write_cmd(0x10);
698b1515 1278 break;
429ccf05
HH		 1279 case '\014':
1280 /* quickly clear the display */
698b1515
WT		 1281 lcd_clear_fast();
1282 break;
429ccf05
HH		 1283 case '\n':
1284 /* flush the remainder of the current line and
1285 go to the beginning of the next line */
698b1515
WT		 1286 for (; lcd_addr_x < lcd_bwidth; lcd_addr_x++)
1287 lcd_write_data(' ');
1288 lcd_addr_x = 0;
1289 lcd_addr_y = (lcd_addr_y + 1) % lcd_height;
1290 lcd_gotoxy();
1291 break;
429ccf05
HH		 1292 case '\r':
1293 /* go to the beginning of the same line */
698b1515
WT		 1294 lcd_addr_x = 0;
1295 lcd_gotoxy();
1296 break;
429ccf05
HH		 1297 case '\t':
1298 /* print a space instead of the tab */
698b1515
WT		 1299 lcd_print(' ');
1300 break;
429ccf05
HH		 1301 default:
1302 /* simply print this char */
698b1515
WT		 1303 lcd_print(c);
1304 break;
7005b584 1305 }
7005b584 1306 }
7005b584 1307
698b1515 1308 /* now we'll see if we're in an escape mode and if the current
429ccf05
HH		 1309 escape sequence can be understood. */
1310 if (lcd_escape_len >= 2) {
1311 int processed = 0;
698b1515 1312
429ccf05
HH		 1313 if (!strcmp(lcd_escape, "[2J")) {
1314 /* clear the display */
1315 lcd_clear_fast();
698b1515 1316 processed = 1;
429ccf05
HH		 1317 } else if (!strcmp(lcd_escape, "[H")) {
1318 /* cursor to home */
698b1515
WT		 1319 lcd_addr_x = lcd_addr_y = 0;
1320 lcd_gotoxy();
1321 processed = 1;
7005b584 1322 }
698b1515
WT		 1323 /* codes starting with ^[[L */
1324 else if ((lcd_escape_len >= 3) &&
429ccf05
HH		 1325 (lcd_escape[0] == '[') &&
1326 (lcd_escape[1] == 'L')) {
1327 processed = handle_lcd_special_code();
7005b584 1328 }
7005b584 1329
698b1515 1330 /* LCD special escape codes */
429ccf05
HH		 1331 /* flush the escape sequence if it's been processed
1332 or if it is getting too long. */
698b1515
WT		 1333 if (processed || (lcd_escape_len >= LCD_ESCAPE_LEN))
1334 lcd_escape_len = -1;
429ccf05 1335 } /* escape codes */
698b1515 1336 }
7005b584 1337
698b1515 1338 return tmp - buf;
7005b584
WT		 1339}
1340
698b1515
WT		 1341static int lcd_open(struct inode *inode, struct file *file)
1342{
1343 if (lcd_open_cnt)
1344 return -EBUSY; /* open only once at a time */
7005b584 1345
698b1515
WT		 1346 if (file->f_mode & FMODE_READ) /* device is write-only */
1347 return -EPERM;
7005b584 1348
698b1515
WT		 1349 if (lcd_must_clear) {
1350 lcd_clear_display();
1351 lcd_must_clear = 0;
1352 }
1353 lcd_open_cnt++;
3ff81013 1354 return nonseekable_open(inode, file);
7005b584
WT		 1355}
1356
698b1515
WT		 1357static int lcd_release(struct inode *inode, struct file *file)
1358{
1359 lcd_open_cnt--;
1360 return 0;
7005b584
WT		 1361}
1362
429ccf05 1363static const struct file_operations lcd_fops = {
698b1515
WT		 1364 .write = lcd_write,
1365 .open = lcd_open,
1366 .release = lcd_release,
3ff81013 1367 .llseek = no_llseek,
7005b584
WT		 1368};
1369
1370static struct miscdevice lcd_dev = {
698b1515
WT		 1371 LCD_MINOR,
1372 "lcd",
1373 &lcd_fops
7005b584
WT		 1374};
1375
7005b584 1376/* public function usable from the kernel for any purpose */
698b1515
WT		 1377void panel_lcd_print(char *s)
1378{
1379 if (lcd_enabled && lcd_initialized)
1380 lcd_write(NULL, s, strlen(s), NULL);
7005b584
WT		 1381}
1382
7005b584 1383/* initialize the LCD driver */
698b1515
WT		 1384void lcd_init(void)
1385{
1386 switch (lcd_type) {
429ccf05
HH		 1387 case LCD_TYPE_OLD:
1388 /* parallel mode, 8 bits */
698b1515
WT		 1389 if (lcd_proto < 0)
1390 lcd_proto = LCD_PROTO_PARALLEL;
1391 if (lcd_charset < 0)
1392 lcd_charset = LCD_CHARSET_NORMAL;
1393 if (lcd_e_pin == PIN_NOT_SET)
1394 lcd_e_pin = PIN_STROBE;
1395 if (lcd_rs_pin == PIN_NOT_SET)
1396 lcd_rs_pin = PIN_AUTOLF;
1397
1398 if (lcd_width < 0)
1399 lcd_width = 40;
1400 if (lcd_bwidth < 0)
1401 lcd_bwidth = 40;
1402 if (lcd_hwidth < 0)
1403 lcd_hwidth = 64;
1404 if (lcd_height < 0)
1405 lcd_height = 2;
7005b584 1406 break;
429ccf05
HH		 1407 case LCD_TYPE_KS0074:
1408 /* serial mode, ks0074 */
698b1515
WT		 1409 if (lcd_proto < 0)
1410 lcd_proto = LCD_PROTO_SERIAL;
1411 if (lcd_charset < 0)
1412 lcd_charset = LCD_CHARSET_KS0074;
1413 if (lcd_bl_pin == PIN_NOT_SET)
1414 lcd_bl_pin = PIN_AUTOLF;
1415 if (lcd_cl_pin == PIN_NOT_SET)
1416 lcd_cl_pin = PIN_STROBE;
1417 if (lcd_da_pin == PIN_NOT_SET)
1418 lcd_da_pin = PIN_D0;
1419
1420 if (lcd_width < 0)
1421 lcd_width = 16;
1422 if (lcd_bwidth < 0)
1423 lcd_bwidth = 40;
1424 if (lcd_hwidth < 0)
1425 lcd_hwidth = 16;
1426 if (lcd_height < 0)
1427 lcd_height = 2;
7005b584 1428 break;
429ccf05
HH		 1429 case LCD_TYPE_NEXCOM:
1430 /* parallel mode, 8 bits, generic */
698b1515
WT		 1431 if (lcd_proto < 0)
1432 lcd_proto = LCD_PROTO_PARALLEL;
1433 if (lcd_charset < 0)
1434 lcd_charset = LCD_CHARSET_NORMAL;
1435 if (lcd_e_pin == PIN_NOT_SET)
1436 lcd_e_pin = PIN_AUTOLF;
1437 if (lcd_rs_pin == PIN_NOT_SET)
1438 lcd_rs_pin = PIN_SELECP;
1439 if (lcd_rw_pin == PIN_NOT_SET)
1440 lcd_rw_pin = PIN_INITP;
1441
1442 if (lcd_width < 0)
1443 lcd_width = 16;
1444 if (lcd_bwidth < 0)
1445 lcd_bwidth = 40;
1446 if (lcd_hwidth < 0)
1447 lcd_hwidth = 64;
1448 if (lcd_height < 0)
1449 lcd_height = 2;
7005b584 1450 break;
429ccf05
HH		 1451 case LCD_TYPE_CUSTOM:
1452 /* customer-defined */
698b1515
WT		 1453 if (lcd_proto < 0)
1454 lcd_proto = DEFAULT_LCD_PROTO;
1455 if (lcd_charset < 0)
1456 lcd_charset = DEFAULT_LCD_CHARSET;
7005b584
WT		 1457 /* default geometry will be set later */
1458 break;
429ccf05
HH		 1459 case LCD_TYPE_HANTRONIX:
1460 /* parallel mode, 8 bits, hantronix-like */
698b1515
WT		 1461 default:
1462 if (lcd_proto < 0)
1463 lcd_proto = LCD_PROTO_PARALLEL;
1464 if (lcd_charset < 0)
1465 lcd_charset = LCD_CHARSET_NORMAL;
1466 if (lcd_e_pin == PIN_NOT_SET)
1467 lcd_e_pin = PIN_STROBE;
1468 if (lcd_rs_pin == PIN_NOT_SET)
1469 lcd_rs_pin = PIN_SELECP;
1470
1471 if (lcd_width < 0)
1472 lcd_width = 16;
1473 if (lcd_bwidth < 0)
1474 lcd_bwidth = 40;
1475 if (lcd_hwidth < 0)
1476 lcd_hwidth = 64;
1477 if (lcd_height < 0)
1478 lcd_height = 2;
7005b584 1479 break;
698b1515 1480 }
7005b584 1481
698b1515
WT		 1482 /* this is used to catch wrong and default values */
1483 if (lcd_width <= 0)
1484 lcd_width = DEFAULT_LCD_WIDTH;
1485 if (lcd_bwidth <= 0)
1486 lcd_bwidth = DEFAULT_LCD_BWIDTH;
1487 if (lcd_hwidth <= 0)
1488 lcd_hwidth = DEFAULT_LCD_HWIDTH;
1489 if (lcd_height <= 0)
1490 lcd_height = DEFAULT_LCD_HEIGHT;
1491
1492 if (lcd_proto == LCD_PROTO_SERIAL) { /* SERIAL */
1493 lcd_write_cmd = lcd_write_cmd_s;
1494 lcd_write_data = lcd_write_data_s;
1495 lcd_clear_fast = lcd_clear_fast_s;
1496
1497 if (lcd_cl_pin == PIN_NOT_SET)
1498 lcd_cl_pin = DEFAULT_LCD_PIN_SCL;
1499 if (lcd_da_pin == PIN_NOT_SET)
1500 lcd_da_pin = DEFAULT_LCD_PIN_SDA;
1501
77943d31 1502 } else if (lcd_proto == LCD_PROTO_PARALLEL) { /* PARALLEL */
698b1515
WT		 1503 lcd_write_cmd = lcd_write_cmd_p8;
1504 lcd_write_data = lcd_write_data_p8;
1505 lcd_clear_fast = lcd_clear_fast_p8;
1506
1507 if (lcd_e_pin == PIN_NOT_SET)
1508 lcd_e_pin = DEFAULT_LCD_PIN_E;
1509 if (lcd_rs_pin == PIN_NOT_SET)
1510 lcd_rs_pin = DEFAULT_LCD_PIN_RS;
1511 if (lcd_rw_pin == PIN_NOT_SET)
1512 lcd_rw_pin = DEFAULT_LCD_PIN_RW;
77943d31
SR		 1513 } else {
1514 lcd_write_cmd = lcd_write_cmd_tilcd;
1515 lcd_write_data = lcd_write_data_tilcd;
1516 lcd_clear_fast = lcd_clear_fast_tilcd;
698b1515 1517 }
7005b584 1518
698b1515
WT		 1519 if (lcd_bl_pin == PIN_NOT_SET)
1520 lcd_bl_pin = DEFAULT_LCD_PIN_BL;
7005b584 1521
698b1515
WT		 1522 if (lcd_e_pin == PIN_NOT_SET)
1523 lcd_e_pin = PIN_NONE;
7005b584 1524 if (lcd_rs_pin == PIN_NOT_SET)
698b1515 1525 lcd_rs_pin = PIN_NONE;
7005b584 1526 if (lcd_rw_pin == PIN_NOT_SET)
698b1515
WT		 1527 lcd_rw_pin = PIN_NONE;
1528 if (lcd_bl_pin == PIN_NOT_SET)
1529 lcd_bl_pin = PIN_NONE;
1530 if (lcd_cl_pin == PIN_NOT_SET)
1531 lcd_cl_pin = PIN_NONE;
1532 if (lcd_da_pin == PIN_NOT_SET)
1533 lcd_da_pin = PIN_NONE;
7005b584 1534
698b1515
WT		 1535 if (lcd_charset < 0)
1536 lcd_charset = DEFAULT_LCD_CHARSET;
7005b584 1537
698b1515
WT		 1538 if (lcd_charset == LCD_CHARSET_KS0074)
1539 lcd_char_conv = lcd_char_conv_ks0074;
1540 else
1541 lcd_char_conv = NULL;
1542
1543 if (lcd_bl_pin != PIN_NONE)
1544 init_scan_timer();
1545
1546 pin_to_bits(lcd_e_pin, lcd_bits[LCD_PORT_D][LCD_BIT_E],
1547 lcd_bits[LCD_PORT_C][LCD_BIT_E]);
1548 pin_to_bits(lcd_rs_pin, lcd_bits[LCD_PORT_D][LCD_BIT_RS],
1549 lcd_bits[LCD_PORT_C][LCD_BIT_RS]);
1550 pin_to_bits(lcd_rw_pin, lcd_bits[LCD_PORT_D][LCD_BIT_RW],
1551 lcd_bits[LCD_PORT_C][LCD_BIT_RW]);
1552 pin_to_bits(lcd_bl_pin, lcd_bits[LCD_PORT_D][LCD_BIT_BL],
1553 lcd_bits[LCD_PORT_C][LCD_BIT_BL]);
1554 pin_to_bits(lcd_cl_pin, lcd_bits[LCD_PORT_D][LCD_BIT_CL],
1555 lcd_bits[LCD_PORT_C][LCD_BIT_CL]);
1556 pin_to_bits(lcd_da_pin, lcd_bits[LCD_PORT_D][LCD_BIT_DA],
1557 lcd_bits[LCD_PORT_C][LCD_BIT_DA]);
1558
1559 /* before this line, we must NOT send anything to the display.
1560 * Since lcd_init_display() needs to write data, we have to
429ccf05 1561 * enable mark the LCD initialized just before. */
698b1515
WT		 1562 lcd_initialized = 1;
1563 lcd_init_display();
7005b584 1564
698b1515 1565 /* display a short message */
7005b584
WT		 1566#ifdef CONFIG_PANEL_CHANGE_MESSAGE
1567#ifdef CONFIG_PANEL_BOOT_MESSAGE
698b1515 1568 panel_lcd_print("\x1b[Lc\x1b[Lb\x1b[L*" CONFIG_PANEL_BOOT_MESSAGE);
7005b584
WT		 1569#endif
1570#else
698b1515
WT		 1571 panel_lcd_print("\x1b[Lc\x1b[Lb\x1b[L*Linux-" UTS_RELEASE "\nPanel-"
1572 PANEL_VERSION);
7005b584 1573#endif
698b1515 1574 lcd_addr_x = lcd_addr_y = 0;
429ccf05
HH		 1575 /* clear the display on the next device opening */
1576 lcd_must_clear = 1;
698b1515 1577 lcd_gotoxy();
7005b584
WT		 1578}
1579
7005b584
WT		 1580/*
1581 * These are the file operation function for user access to /dev/keypad
1582 */
1583
698b1515
WT		 1584static ssize_t keypad_read(struct file *file,
1585 char *buf, size_t count, loff_t *ppos)
1586{
7005b584 1587
698b1515
WT		 1588 unsigned i = *ppos;
1589 char *tmp = buf;
7005b584 1590
698b1515
WT		 1591 if (keypad_buflen == 0) {
1592 if (file->f_flags & O_NONBLOCK)
1593 return -EAGAIN;
7005b584 1594
698b1515
WT		 1595 interruptible_sleep_on(&keypad_read_wait);
1596 if (signal_pending(current))
1597 return -EINTR;
1598 }
7005b584 1599
429ccf05
HH		 1600 for (; count-- > 0 && (keypad_buflen > 0);
1601 ++i, ++tmp, --keypad_buflen) {
698b1515
WT		 1602 put_user(keypad_buffer[keypad_start], tmp);
1603 keypad_start = (keypad_start + 1) % KEYPAD_BUFFER;
1604 }
1605 *ppos = i;
7005b584 1606
698b1515 1607 return tmp - buf;
7005b584
WT		 1608}
1609
698b1515
WT		 1610static int keypad_open(struct inode *inode, struct file *file)
1611{
7005b584 1612
698b1515
WT		 1613 if (keypad_open_cnt)
1614 return -EBUSY; /* open only once at a time */
7005b584 1615
698b1515
WT		 1616 if (file->f_mode & FMODE_WRITE) /* device is read-only */
1617 return -EPERM;
7005b584 1618
698b1515
WT		 1619 keypad_buflen = 0; /* flush the buffer on opening */
1620 keypad_open_cnt++;
1621 return 0;
7005b584
WT		 1622}
1623
698b1515
WT		 1624static int keypad_release(struct inode *inode, struct file *file)
1625{
1626 keypad_open_cnt--;
1627 return 0;
7005b584
WT		 1628}
1629
429ccf05 1630static const struct file_operations keypad_fops = {
698b1515
WT		 1631 .read = keypad_read, /* read */
1632 .open = keypad_open, /* open */
1633 .release = keypad_release, /* close */
6038f373 1634 .llseek = default_llseek,
7005b584
WT		 1635};
1636
1637static struct miscdevice keypad_dev = {
698b1515
WT		 1638 KEYPAD_MINOR,
1639 "keypad",
1640 &keypad_fops
7005b584
WT		 1641};
1642
698b1515
WT		 1643static void keypad_send_key(char *string, int max_len)
1644{
1645 if (init_in_progress)
1646 return;
1647
1648 /* send the key to the device only if a process is attached to it. */
1649 if (keypad_open_cnt > 0) {
1650 while (max_len-- && keypad_buflen < KEYPAD_BUFFER && *string) {
1651 keypad_buffer[(keypad_start + keypad_buflen++) %
1652 KEYPAD_BUFFER] = *string++;
1653 }
1654 wake_up_interruptible(&keypad_read_wait);
7005b584 1655 }
7005b584
WT		 1656}
1657
429ccf05
HH		 1658/* this function scans all the bits involving at least one logical signal,
1659 * and puts the results in the bitfield "phys_read" (one bit per established
1660 * contact), and sets "phys_read_prev" to "phys_read".
7005b584 1661 *
429ccf05
HH		 1662 * Note: to debounce input signals, we will only consider as switched a signal
1663 * which is stable across 2 measures. Signals which are different between two
1664 * reads will be kept as they previously were in their logical form (phys_prev).
1665 * A signal which has just switched will have a 1 in
1666 * (phys_read ^ phys_read_prev).
7005b584 1667 */
698b1515
WT		 1668static void phys_scan_contacts(void)
1669{
1670 int bit, bitval;
1671 char oldval;
1672 char bitmask;
1673 char gndmask;
1674
1675 phys_prev = phys_curr;
1676 phys_read_prev = phys_read;
1677 phys_read = 0; /* flush all signals */
1678
429ccf05
HH		 1679 /* keep track of old value, with all outputs disabled */
1680 oldval = r_dtr(pprt) | scan_mask_o;
1681 /* activate all keyboard outputs (active low) */
1682 w_dtr(pprt, oldval & ~scan_mask_o);
1683
1684 /* will have a 1 for each bit set to gnd */
1685 bitmask = PNL_PINPUT(r_str(pprt)) & scan_mask_i;
1686 /* disable all matrix signals */
1687 w_dtr(pprt, oldval);
698b1515
WT		 1688
1689 /* now that all outputs are cleared, the only active input bits are
1690 * directly connected to the ground
7005b584 1691 */
698b1515 1692
429ccf05
HH		 1693 /* 1 for each grounded input */
1694 gndmask = PNL_PINPUT(r_str(pprt)) & scan_mask_i;
1695
1696 /* grounded inputs are signals 40-44 */
1697 phys_read |= (pmask_t) gndmask << 40;
7005b584 1698
698b1515 1699 if (bitmask != gndmask) {
429ccf05
HH		 1700 /* since clearing the outputs changed some inputs, we know
1701 * that some input signals are currently tied to some outputs.
1702 * So we'll scan them.
698b1515
WT		 1703 */
1704 for (bit = 0; bit < 8; bit++) {
1705 bitval = 1 << bit;
7005b584 1706
698b1515
WT		 1707 if (!(scan_mask_o & bitval)) /* skip unused bits */
1708 continue;
1709
1710 w_dtr(pprt, oldval & ~bitval); /* enable this output */
1711 bitmask = PNL_PINPUT(r_str(pprt)) & ~gndmask;
1712 phys_read |= (pmask_t) bitmask << (5 * bit);
1713 }
1714 w_dtr(pprt, oldval); /* disable all outputs */
7005b584 1715 }
429ccf05
HH		 1716 /* this is easy: use old bits when they are flapping,
1717 * use new ones when stable */
1718 phys_curr = (phys_prev & (phys_read ^ phys_read_prev)) |
1719 (phys_read & ~(phys_read ^ phys_read_prev));
1720}
1721
1722static inline int input_state_high(struct logical_input *input)
1723{
1724#if 0
1725 /* FIXME:
1726 * this is an invalid test. It tries to catch
1727 * transitions from single-key to multiple-key, but
1728 * doesn't take into account the contacts polarity.
1729 * The only solution to the problem is to parse keys
1730 * from the most complex to the simplest combinations,
1731 * and mark them as 'caught' once a combination
1732 * matches, then unmatch it for all other ones.
1733 */
1734
1735 /* try to catch dangerous transitions cases :
1736 * someone adds a bit, so this signal was a false
1737 * positive resulting from a transition. We should
1738 * invalidate the signal immediately and not call the
1739 * release function.
1740 * eg: 0 -(press A)-> A -(press B)-> AB : don't match A's release.
1741 */
1742 if (((phys_prev & input->mask) == input->value)
1743 && ((phys_curr & input->mask) > input->value)) {
1744 input->state = INPUT_ST_LOW; /* invalidate */
1745 return 1;
1746 }
1747#endif
1748
1749 if ((phys_curr & input->mask) == input->value) {
1750 if ((input->type == INPUT_TYPE_STD) &&
1751 (input->high_timer == 0)) {
1752 input->high_timer++;
1753 if (input->u.std.press_fct != NULL)
1754 input->u.std.press_fct(input->u.std.press_data);
1755 } else if (input->type == INPUT_TYPE_KBD) {
1756 /* will turn on the light */
1757 keypressed = 1;
1758
1759 if (input->high_timer == 0) {
1760 char *press_str = input->u.kbd.press_str;
1761 if (press_str[0])
1762 keypad_send_key(press_str,
1763 sizeof(press_str));
1764 }
1765
1766 if (input->u.kbd.repeat_str[0]) {
1767 char *repeat_str = input->u.kbd.repeat_str;
1768 if (input->high_timer >= KEYPAD_REP_START) {
1769 input->high_timer -= KEYPAD_REP_DELAY;
1770 keypad_send_key(repeat_str,
1771 sizeof(repeat_str));
1772 }
1773 /* we will need to come back here soon */
1774 inputs_stable = 0;
1775 }
1776
1777 if (input->high_timer < 255)
1778 input->high_timer++;
1779 }
1780 return 1;
1781 } else {
1782 /* else signal falling down. Let's fall through. */
1783 input->state = INPUT_ST_FALLING;
1784 input->fall_timer = 0;
1785 }
1786 return 0;
1787}
1788
1789static inline void input_state_falling(struct logical_input *input)
1790{
1791#if 0
1792 /* FIXME !!! same comment as in input_state_high */
1793 if (((phys_prev & input->mask) == input->value)
1794 && ((phys_curr & input->mask) > input->value)) {
1795 input->state = INPUT_ST_LOW; /* invalidate */
1796 return;
1797 }
1798#endif
1799
1800 if ((phys_curr & input->mask) == input->value) {
1801 if (input->type == INPUT_TYPE_KBD) {
1802 /* will turn on the light */
1803 keypressed = 1;
1804
1805 if (input->u.kbd.repeat_str[0]) {
1806 char *repeat_str = input->u.kbd.repeat_str;
1807 if (input->high_timer >= KEYPAD_REP_START)
1808 input->high_timer -= KEYPAD_REP_DELAY;
1809 keypad_send_key(repeat_str,
1810 sizeof(repeat_str));
1811 /* we will need to come back here soon */
1812 inputs_stable = 0;
1813 }
1814
1815 if (input->high_timer < 255)
1816 input->high_timer++;
1817 }
1818 input->state = INPUT_ST_HIGH;
1819 } else if (input->fall_timer >= input->fall_time) {
1820 /* call release event */
1821 if (input->type == INPUT_TYPE_STD) {
1822 void (*release_fct)(int) = input->u.std.release_fct;
1823 if (release_fct != NULL)
1824 release_fct(input->u.std.release_data);
1825 } else if (input->type == INPUT_TYPE_KBD) {
1826 char *release_str = input->u.kbd.release_str;
1827 if (release_str[0])
1828 keypad_send_key(release_str,
1829 sizeof(release_str));
1830 }
1831
1832 input->state = INPUT_ST_LOW;
1833 } else {
1834 input->fall_timer++;
1835 inputs_stable = 0;
1836 }
7005b584
WT		 1837}
1838
698b1515
WT		 1839static void panel_process_inputs(void)
1840{
1841 struct list_head *item;
1842 struct logical_input *input;
7005b584
WT		 1843
1844#if 0
698b1515
WT		 1845 printk(KERN_DEBUG
1846 "entering panel_process_inputs with pp=%016Lx & pc=%016Lx\n",
1847 phys_prev, phys_curr);
7005b584
WT		 1848#endif
1849
698b1515
WT		 1850 keypressed = 0;
1851 inputs_stable = 1;
1852 list_for_each(item, &logical_inputs) {
1853 input = list_entry(item, struct logical_input, list);
1854
1855 switch (input->state) {
1856 case INPUT_ST_LOW:
1857 if ((phys_curr & input->mask) != input->value)
1858 break;
429ccf05
HH		 1859 /* if all needed ones were already set previously,
1860 * this means that this logical signal has been
1861 * activated by the releasing of another combined
1862 * signal, so we don't want to match.
1863 * eg: AB -(release B)-> A -(release A)-> 0 :
1864 * don't match A.
698b1515
WT		 1865 */
1866 if ((phys_prev & input->mask) == input->value)
1867 break;
1868 input->rise_timer = 0;
1869 input->state = INPUT_ST_RISING;
1870 /* no break here, fall through */
1871 case INPUT_ST_RISING:
1872 if ((phys_curr & input->mask) != input->value) {
1873 input->state = INPUT_ST_LOW;
1874 break;
1875 }
1876 if (input->rise_timer < input->rise_time) {
1877 inputs_stable = 0;
1878 input->rise_timer++;
1879 break;
1880 }
1881 input->high_timer = 0;
1882 input->state = INPUT_ST_HIGH;
1883 /* no break here, fall through */
1884 case INPUT_ST_HIGH:
429ccf05 1885 if (input_state_high(input))
698b1515 1886 break;
698b1515
WT		 1887 /* no break here, fall through */
1888 case INPUT_ST_FALLING:
429ccf05 1889 input_state_falling(input);
698b1515
WT		 1890 }
1891 }
1892}
7005b584 1893
698b1515
WT		 1894static void panel_scan_timer(void)
1895{
63023177 1896 if (keypad_enabled && keypad_initialized) {
698b1515
WT		 1897 if (spin_trylock(&pprt_lock)) {
1898 phys_scan_contacts();
429ccf05
HH		 1899
1900 /* no need for the parport anymore */
1901 spin_unlock(&pprt_lock);
7005b584
WT		 1902 }
1903
698b1515
WT		 1904 if (!inputs_stable || phys_curr != phys_prev)
1905 panel_process_inputs();
7005b584 1906 }
7005b584 1907
698b1515
WT		 1908 if (lcd_enabled && lcd_initialized) {
1909 if (keypressed) {
1910 if (light_tempo == 0 && ((lcd_flags & LCD_FLAG_L) == 0))
1911 lcd_backlight(1);
1912 light_tempo = FLASH_LIGHT_TEMPO;
1913 } else if (light_tempo > 0) {
1914 light_tempo--;
1915 if (light_tempo == 0 && ((lcd_flags & LCD_FLAG_L) == 0))
1916 lcd_backlight(0);
1917 }
1918 }
1919
1920 mod_timer(&scan_timer, jiffies + INPUT_POLL_TIME);
7005b584
WT		 1921}
1922
698b1515
WT		 1923static void init_scan_timer(void)
1924{
1925 if (scan_timer.function != NULL)
1926 return; /* already started */
1927
1928 init_timer(&scan_timer);
1929 scan_timer.expires = jiffies + INPUT_POLL_TIME;
1930 scan_timer.data = 0;
1931 scan_timer.function = (void *)&panel_scan_timer;
1932 add_timer(&scan_timer);
7005b584
WT		 1933}
1934
1935/* converts a name of the form "({BbAaPpSsEe}{01234567-})*" to a series of bits.
429ccf05
HH		 1936 * if <omask> or <imask> are non-null, they will be or'ed with the bits
1937 * corresponding to out and in bits respectively.
7005b584
WT		 1938 * returns 1 if ok, 0 if error (in which case, nothing is written).
1939 */
698b1515
WT		 1940static int input_name2mask(char *name, pmask_t *mask, pmask_t *value,
1941 char *imask, char *omask)
1942{
1943 static char sigtab[10] = "EeSsPpAaBb";
1944 char im, om;
1945 pmask_t m, v;
1946
1947 om = im = m = v = 0ULL;
1948 while (*name) {
1949 int in, out, bit, neg;
429ccf05
HH		 1950 for (in = 0; (in < sizeof(sigtab)) &&
1951 (sigtab[in] != *name); in++)
698b1515
WT		 1952 ;
1953 if (in >= sizeof(sigtab))
1954 return 0; /* input name not found */
1955 neg = (in & 1); /* odd (lower) names are negated */
1956 in >>= 1;
1957 im |= (1 << in);
1958
1959 name++;
1960 if (isdigit(*name)) {
1961 out = *name - '0';
1962 om |= (1 << out);
1963 } else if (*name == '-')
1964 out = 8;
1965 else
1966 return 0; /* unknown bit name */
1967
1968 bit = (out * 5) + in;
1969
1970 m |= 1ULL << bit;
1971 if (!neg)
1972 v |= 1ULL << bit;
1973 name++;
7005b584 1974 }
698b1515
WT		 1975 *mask = m;
1976 *value = v;
1977 if (imask)
1978 *imask |= im;
1979 if (omask)
1980 *omask |= om;
1981 return 1;
7005b584
WT		 1982}
1983
1984/* tries to bind a key to the signal name <name>. The key will send the
1985 * strings <press>, <repeat>, <release> for these respective events.
1986 * Returns the pointer to the new key if ok, NULL if the key could not be bound.
1987 */
698b1515
WT		 1988static struct logical_input *panel_bind_key(char *name, char *press,
1989 char *repeat, char *release)
1990{
1991 struct logical_input *key;
1992
7a6cb0d5 1993 key = kzalloc(sizeof(struct logical_input), GFP_KERNEL);
698b1515
WT		 1994 if (!key) {
1995 printk(KERN_ERR "panel: not enough memory\n");
1996 return NULL;
1997 }
698b1515 1998 if (!input_name2mask(name, &key->mask, &key->value, &scan_mask_i,
cb46f472
KV		 1999 &scan_mask_o)) {
2000 kfree(key);
698b1515 2001 return NULL;
cb46f472 2002 }
698b1515
WT		 2003
2004 key->type = INPUT_TYPE_KBD;
2005 key->state = INPUT_ST_LOW;
2006 key->rise_time = 1;
2007 key->fall_time = 1;
7005b584
WT		 2008
2009#if 0
698b1515
WT		 2010 printk(KERN_DEBUG "bind: <%s> : m=%016Lx v=%016Lx\n", name, key->mask,
2011 key->value);
7005b584 2012#endif
698b1515
WT		 2013 strncpy(key->u.kbd.press_str, press, sizeof(key->u.kbd.press_str));
2014 strncpy(key->u.kbd.repeat_str, repeat, sizeof(key->u.kbd.repeat_str));
2015 strncpy(key->u.kbd.release_str, release,
2016 sizeof(key->u.kbd.release_str));
2017 list_add(&key->list, &logical_inputs);
2018 return key;
7005b584
WT		 2019}
2020
63023177 2021#if 0
7005b584
WT		 2022/* tries to bind a callback function to the signal name <name>. The function
2023 * <press_fct> will be called with the <press_data> arg when the signal is
2024 * activated, and so on for <release_fct>/<release_data>
429ccf05
HH		 2025 * Returns the pointer to the new signal if ok, NULL if the signal could not
2026 * be bound.
7005b584
WT		 2027 */
2028static struct logical_input *panel_bind_callback(char *name,
698b1515
WT		 2029 void (*press_fct) (int),
2030 int press_data,
2031 void (*release_fct) (int),
2032 int release_data)
2033{
2034 struct logical_input *callback;
2035
2036 callback = kmalloc(sizeof(struct logical_input), GFP_KERNEL);
2037 if (!callback) {
2038 printk(KERN_ERR "panel: not enough memory\n");
2039 return NULL;
2040 }
2041 memset(callback, 0, sizeof(struct logical_input));
2042 if (!input_name2mask(name, &callback->mask, &callback->value,
2043 &scan_mask_i, &scan_mask_o))
2044 return NULL;
2045
2046 callback->type = INPUT_TYPE_STD;
2047 callback->state = INPUT_ST_LOW;
2048 callback->rise_time = 1;
2049 callback->fall_time = 1;
2050 callback->u.std.press_fct = press_fct;
2051 callback->u.std.press_data = press_data;
2052 callback->u.std.release_fct = release_fct;
2053 callback->u.std.release_data = release_data;
2054 list_add(&callback->list, &logical_inputs);
2055 return callback;
7005b584 2056}
63023177 2057#endif
7005b584 2058
698b1515
WT		 2059static void keypad_init(void)
2060{
2061 int keynum;
2062 init_waitqueue_head(&keypad_read_wait);
2063 keypad_buflen = 0; /* flushes any eventual noisy keystroke */
7005b584 2064
698b1515 2065 /* Let's create all known keys */
7005b584 2066
698b1515
WT		 2067 for (keynum = 0; keypad_profile[keynum][0][0]; keynum++) {
2068 panel_bind_key(keypad_profile[keynum][0],
2069 keypad_profile[keynum][1],
2070 keypad_profile[keynum][2],
2071 keypad_profile[keynum][3]);
2072 }
7005b584 2073
698b1515
WT		 2074 init_scan_timer();
2075 keypad_initialized = 1;
7005b584
WT		 2076}
2077
7005b584
WT		 2078/**************************************************/
2079/* device initialization */
2080/**************************************************/
2081
698b1515
WT		 2082static int panel_notify_sys(struct notifier_block *this, unsigned long code,
2083 void *unused)
2084{
2085 if (lcd_enabled && lcd_initialized) {
2086 switch (code) {
2087 case SYS_DOWN:
2088 panel_lcd_print
2089 ("\x0cReloading\nSystem...\x1b[Lc\x1b[Lb\x1b[L+");
2090 break;
2091 case SYS_HALT:
2092 panel_lcd_print
2093 ("\x0cSystem Halted.\x1b[Lc\x1b[Lb\x1b[L+");
2094 break;
2095 case SYS_POWER_OFF:
2096 panel_lcd_print("\x0cPower off.\x1b[Lc\x1b[Lb\x1b[L+");
2097 break;
2098 default:
2099 break;
2100 }
7005b584 2101 }
698b1515 2102 return NOTIFY_DONE;
7005b584
WT		 2103}
2104
2105static struct notifier_block panel_notifier = {
2106 panel_notify_sys,
2107 NULL,
2108 0
2109};
2110
698b1515 2111static void panel_attach(struct parport *port)
7005b584 2112{
698b1515
WT		 2113 if (port->number != parport)
2114 return;
2115
2116 if (pprt) {
2117 printk(KERN_ERR
429ccf05
HH		 2118 "panel_attach(): port->number=%d parport=%d, "
2119 "already registered !\n",
698b1515
WT		 2120 port->number, parport);
2121 return;
2122 }
2123
429ccf05 2124 pprt = parport_register_device(port, "panel", NULL, NULL, /* pf, kf */
698b1515
WT		 2125 NULL,
2126 /*PARPORT_DEV_EXCL */
2127 0, (void *)&pprt);
10f3f5b7
KV		 2128 if (pprt == NULL) {
2129 pr_err("panel_attach(): port->number=%d parport=%d, "
2130 "parport_register_device() failed\n",
2131 port->number, parport);
2132 return;
2133 }
698b1515
WT		 2134
2135 if (parport_claim(pprt)) {
2136 printk(KERN_ERR
429ccf05
HH		 2137 "Panel: could not claim access to parport%d. "
2138 "Aborting.\n", parport);
10f3f5b7 2139 goto err_unreg_device;
698b1515
WT		 2140 }
2141
429ccf05
HH		 2142 /* must init LCD first, just in case an IRQ from the keypad is
2143 * generated at keypad init
2144 */
698b1515
WT		 2145 if (lcd_enabled) {
2146 lcd_init();
10f3f5b7
KV		 2147 if (misc_register(&lcd_dev))
2148 goto err_unreg_device;
698b1515
WT		 2149 }
2150
2151 if (keypad_enabled) {
2152 keypad_init();
10f3f5b7
KV		 2153 if (misc_register(&keypad_dev))
2154 goto err_lcd_unreg;
698b1515 2155 }
10f3f5b7
KV		 2156 return;
2157
2158err_lcd_unreg:
2159 if (lcd_enabled)
2160 misc_deregister(&lcd_dev);
2161err_unreg_device:
2162 parport_unregister_device(pprt);
2163 pprt = NULL;
7005b584
WT		 2164}
2165
698b1515 2166static void panel_detach(struct parport *port)
7005b584 2167{
698b1515
WT		 2168 if (port->number != parport)
2169 return;
2170
2171 if (!pprt) {
2172 printk(KERN_ERR
429ccf05
HH		 2173 "panel_detach(): port->number=%d parport=%d, "
2174 "nothing to unregister.\n",
698b1515
WT		 2175 port->number, parport);
2176 return;
2177 }
2178
0b0595bf 2179 if (keypad_enabled && keypad_initialized) {
698b1515 2180 misc_deregister(&keypad_dev);
0b0595bf
PH		 2181 keypad_initialized = 0;
2182 }
698b1515 2183
0b0595bf 2184 if (lcd_enabled && lcd_initialized) {
698b1515 2185 misc_deregister(&lcd_dev);
0b0595bf
PH		 2186 lcd_initialized = 0;
2187 }
698b1515
WT		 2188
2189 parport_release(pprt);
2190 parport_unregister_device(pprt);
2191 pprt = NULL;
7005b584
WT		 2192}
2193
2194static struct parport_driver panel_driver = {
698b1515
WT		 2195 .name = "panel",
2196 .attach = panel_attach,
2197 .detach = panel_detach,
7005b584
WT		 2198};
2199
2200/* init function */
698b1515
WT		 2201int panel_init(void)
2202{
2203 /* for backwards compatibility */
2204 if (keypad_type < 0)
2205 keypad_type = keypad_enabled;
2206
2207 if (lcd_type < 0)
2208 lcd_type = lcd_enabled;
2209
2210 if (parport < 0)
2211 parport = DEFAULT_PARPORT;
2212
2213 /* take care of an eventual profile */
2214 switch (profile) {
429ccf05
HH		 2215 case PANEL_PROFILE_CUSTOM:
2216 /* custom profile */
698b1515
WT		 2217 if (keypad_type < 0)
2218 keypad_type = DEFAULT_KEYPAD;
698b1515
WT		 2219 if (lcd_type < 0)
2220 lcd_type = DEFAULT_LCD;
2221 break;
429ccf05
HH		 2222 case PANEL_PROFILE_OLD:
2223 /* 8 bits, 2*16, old keypad */
698b1515
WT		 2224 if (keypad_type < 0)
2225 keypad_type = KEYPAD_TYPE_OLD;
698b1515
WT		 2226 if (lcd_type < 0)
2227 lcd_type = LCD_TYPE_OLD;
2228 if (lcd_width < 0)
2229 lcd_width = 16;
2230 if (lcd_hwidth < 0)
2231 lcd_hwidth = 16;
2232 break;
429ccf05
HH		 2233 case PANEL_PROFILE_NEW:
2234 /* serial, 2*16, new keypad */
698b1515
WT		 2235 if (keypad_type < 0)
2236 keypad_type = KEYPAD_TYPE_NEW;
698b1515
WT		 2237 if (lcd_type < 0)
2238 lcd_type = LCD_TYPE_KS0074;
2239 break;
429ccf05
HH		 2240 case PANEL_PROFILE_HANTRONIX:
2241 /* 8 bits, 2*16 hantronix-like, no keypad */
698b1515
WT		 2242 if (keypad_type < 0)
2243 keypad_type = KEYPAD_TYPE_NONE;
698b1515
WT		 2244 if (lcd_type < 0)
2245 lcd_type = LCD_TYPE_HANTRONIX;
2246 break;
429ccf05
HH		 2247 case PANEL_PROFILE_NEXCOM:
2248 /* generic 8 bits, 2*16, nexcom keypad, eg. Nexcom. */
698b1515
WT		 2249 if (keypad_type < 0)
2250 keypad_type = KEYPAD_TYPE_NEXCOM;
698b1515
WT		 2251 if (lcd_type < 0)
2252 lcd_type = LCD_TYPE_NEXCOM;
2253 break;
429ccf05
HH		 2254 case PANEL_PROFILE_LARGE:
2255 /* 8 bits, 2*40, old keypad */
698b1515
WT		 2256 if (keypad_type < 0)
2257 keypad_type = KEYPAD_TYPE_OLD;
698b1515
WT		 2258 if (lcd_type < 0)
2259 lcd_type = LCD_TYPE_OLD;
2260 break;
2261 }
2262
2263 lcd_enabled = (lcd_type > 0);
2264 keypad_enabled = (keypad_type > 0);
2265
2266 switch (keypad_type) {
2267 case KEYPAD_TYPE_OLD:
2268 keypad_profile = old_keypad_profile;
2269 break;
2270 case KEYPAD_TYPE_NEW:
2271 keypad_profile = new_keypad_profile;
2272 break;
2273 case KEYPAD_TYPE_NEXCOM:
2274 keypad_profile = nexcom_keypad_profile;
2275 break;
2276 default:
2277 keypad_profile = NULL;
2278 break;
2279 }
2280
2281 /* tells various subsystems about the fact that we are initializing */
2282 init_in_progress = 1;
2283
2284 if (parport_register_driver(&panel_driver)) {
2285 printk(KERN_ERR
2286 "Panel: could not register with parport. Aborting.\n");
2287 return -EIO;
2288 }
2289
63023177
WT		 2290 if (!lcd_enabled && !keypad_enabled) {
2291 /* no device enabled, let's release the parport */
698b1515
WT		 2292 if (pprt) {
2293 parport_release(pprt);
2294 parport_unregister_device(pprt);
060132ae 2295 pprt = NULL;
698b1515
WT		 2296 }
2297 parport_unregister_driver(&panel_driver);
2298 printk(KERN_ERR "Panel driver version " PANEL_VERSION
2299 " disabled.\n");
2300 return -ENODEV;
7005b584 2301 }
7005b584 2302
698b1515
WT		 2303 register_reboot_notifier(&panel_notifier);
2304
2305 if (pprt)
2306 printk(KERN_INFO "Panel driver version " PANEL_VERSION
2307 " registered on parport%d (io=0x%lx).\n", parport,
2308 pprt->port->base);
2309 else
2310 printk(KERN_INFO "Panel driver version " PANEL_VERSION
2311 " not yet registered\n");
429ccf05
HH		 2312 /* tells various subsystems about the fact that initialization
2313 is finished */
698b1515
WT		 2314 init_in_progress = 0;
2315 return 0;
2316}
7005b584 2317
f6d1fcfe 2318static int __init panel_init_module(void)
698b1515
WT		 2319{
2320 return panel_init();
7005b584
WT		 2321}
2322
f6d1fcfe 2323static void __exit panel_cleanup_module(void)
698b1515
WT		 2324{
2325 unregister_reboot_notifier(&panel_notifier);
7005b584 2326
698b1515
WT		 2327 if (scan_timer.function != NULL)
2328 del_timer(&scan_timer);
7005b584 2329
5789813e 2330 if (pprt != NULL) {
0b0595bf 2331 if (keypad_enabled) {
5789813e 2332 misc_deregister(&keypad_dev);
0b0595bf
PH		 2333 keypad_initialized = 0;
2334 }
5789813e
CL		 2335
2336 if (lcd_enabled) {
2337 panel_lcd_print("\x0cLCD driver " PANEL_VERSION
2338 "\nunloaded.\x1b[Lc\x1b[Lb\x1b[L-");
2339 misc_deregister(&lcd_dev);
0b0595bf 2340 lcd_initialized = 0;
5789813e 2341 }
7005b584 2342
5789813e
CL		 2343 /* TODO: free all input signals */
2344 parport_release(pprt);
2345 parport_unregister_device(pprt);
060132ae 2346 pprt = NULL;
698b1515 2347 }
698b1515 2348 parport_unregister_driver(&panel_driver);
7005b584 2349}
7005b584 2350
7005b584
WT		 2351module_init(panel_init_module);
2352module_exit(panel_cleanup_module);
2353MODULE_AUTHOR("Willy Tarreau");
2354MODULE_LICENSE("GPL");
7005b584
WT		 2355
2356/*
2357 * Local variables:
2358 * c-indent-level: 4
2359 * tab-width: 8
2360 * End:
2361 */
Clone of davem's net-next-2.6 tree