2 * Front panel driver for Linux
3 * Copyright (C) 2000-2008, Willy Tarreau <w@1wt.eu>
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.
10 * This code drives an LCD module (/dev/lcd), and a keypad (/dev/keypad)
11 * connected to a parallel printer port.
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.
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.
21 * Several profiles are provided for commonly found LCD+keypad modules on the
22 * market, such as those found in Nexcom's appliances.
25 * - the initialization/deinitialization process is very dirty and should
26 * be rewritten. It may even be buggy.
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
37 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
39 #include <linux/module.h>
41 #include <linux/types.h>
42 #include <linux/errno.h>
43 #include <linux/signal.h>
44 #include <linux/sched.h>
45 #include <linux/spinlock.h>
46 #include <linux/interrupt.h>
47 #include <linux/miscdevice.h>
48 #include <linux/slab.h>
49 #include <linux/ioport.h>
50 #include <linux/fcntl.h>
51 #include <linux/init.h>
52 #include <linux/delay.h>
53 #include <linux/kernel.h>
54 #include <linux/ctype.h>
55 #include <linux/parport.h>
56 #include <linux/list.h>
57 #include <linux/notifier.h>
58 #include <linux/reboot.h>
59 #include <generated/utsrelease.h>
62 #include <linux/uaccess.h>
65 #define KEYPAD_MINOR 185
67 #define PANEL_VERSION "0.9.5"
69 #define LCD_MAXBYTES 256 /* max burst write */
71 #define KEYPAD_BUFFER 64
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)
80 /* keep the light on this times INPUT_POLL_TIME for each flash */
81 #define FLASH_LIGHT_TEMPO (200)
83 /* converts an r_str() input to an active high, bits string : 000BAOSE */
84 #define PNL_PINPUT(a) ((((unsigned char)(a)) ^ 0x7F) >> 3)
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 */
92 #define PNL_PBIDIR 0x20 /* bi-directional ports */
93 /* high to read data in or-ed with data out */
94 #define PNL_PINTEN 0x10
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 */
119 #define PIN_AUTOLF 14
121 #define PIN_SELECP 17
122 #define PIN_NOT_SET 127
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 */
133 #define LCD_ESCAPE_LEN 24 /* max chars for LCD escape command */
134 #define LCD_ESCAPE_CHAR 27 /* use char 27 for escape command */
138 /* macros to simplify use of the parallel port */
139 #define r_ctr(x) (parport_read_control((x)->port))
140 #define r_dtr(x) (parport_read_data((x)->port))
141 #define r_str(x) (parport_read_status((x)->port))
142 #define w_ctr(x, y) (parport_write_control((x)->port, (y)))
143 #define w_dtr(x, y) (parport_write_data((x)->port, (y)))
145 /* this defines which bits are to be used and which ones to be ignored */
146 /* logical or of the output bits involved in the scan matrix */
147 static __u8 scan_mask_o
;
148 /* logical or of the input bits involved in the scan matrix */
149 static __u8 scan_mask_i
;
151 typedef __u64 pmask_t
;
165 struct logical_input
{
166 struct list_head list
;
169 enum input_type type
;
170 enum input_state state
;
171 __u8 rise_time
, fall_time
;
172 __u8 rise_timer
, fall_timer
, high_timer
;
175 struct { /* valid when type == INPUT_TYPE_STD */
176 void (*press_fct
)(int);
177 void (*release_fct
)(int);
181 struct { /* valid when type == INPUT_TYPE_KBD */
182 /* strings can be non null-terminated */
183 char press_str
[sizeof(void *) + sizeof(int)];
184 char repeat_str
[sizeof(void *) + sizeof(int)];
185 char release_str
[sizeof(void *) + sizeof(int)];
190 static LIST_HEAD(logical_inputs
); /* list of all defined logical inputs */
192 /* physical contacts history
193 * Physical contacts are a 45 bits string of 9 groups of 5 bits each.
194 * The 8 lower groups correspond to output bits 0 to 7, and the 9th group
195 * corresponds to the ground.
196 * Within each group, bits are stored in the same order as read on the port :
197 * BAPSE (busy=4, ack=3, paper empty=2, select=1, error=0).
198 * So, each __u64 (or pmask_t) is represented like this :
199 * 0000000000000000000BAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSEBAPSE
200 * <-----unused------><gnd><d07><d06><d05><d04><d03><d02><d01><d00>
203 /* what has just been read from the I/O ports */
204 static pmask_t phys_read
;
205 /* previous phys_read */
206 static pmask_t phys_read_prev
;
207 /* stabilized phys_read (phys_read|phys_read_prev) */
208 static pmask_t phys_curr
;
209 /* previous phys_curr */
210 static pmask_t phys_prev
;
211 /* 0 means that at least one logical signal needs be computed */
212 static char inputs_stable
;
214 /* these variables are specific to the keypad */
219 static char keypad_buffer
[KEYPAD_BUFFER
];
220 static int keypad_buflen
;
221 static int keypad_start
;
222 static char keypressed
;
223 static wait_queue_head_t keypad_read_wait
;
225 /* lcd-specific variables */
231 /* TODO: use bool here? */
242 /* TODO: use union here? */
252 /* contains the LCD config state */
253 unsigned long int flags
;
255 /* Contains the LCD X and Y offset */
261 /* Current escape sequence and it's length or -1 if outside */
263 char buf
[LCD_ESCAPE_LEN
+ 1];
268 /* Needed only for init */
269 static int selected_lcd_type
= NOT_SET
;
272 * Bit masks to convert LCD signals to parallel port outputs.
273 * _d_ are values for data port, _c_ are for control port.
274 * [0] = signal OFF, [1] = signal ON, [2] = mask
281 * one entry for each bit on the LCD
292 * each bit can be either connected to a DATA or CTRL port
298 static unsigned char lcd_bits
[LCD_PORTS
][LCD_BITS
][BIT_STATES
];
303 #define LCD_PROTO_PARALLEL 0
304 #define LCD_PROTO_SERIAL 1
305 #define LCD_PROTO_TI_DA8XX_LCD 2
310 #define LCD_CHARSET_NORMAL 0
311 #define LCD_CHARSET_KS0074 1
316 #define LCD_TYPE_NONE 0
317 #define LCD_TYPE_OLD 1
318 #define LCD_TYPE_KS0074 2
319 #define LCD_TYPE_HANTRONIX 3
320 #define LCD_TYPE_NEXCOM 4
321 #define LCD_TYPE_CUSTOM 5
326 #define KEYPAD_TYPE_NONE 0
327 #define KEYPAD_TYPE_OLD 1
328 #define KEYPAD_TYPE_NEW 2
329 #define KEYPAD_TYPE_NEXCOM 3
334 #define PANEL_PROFILE_CUSTOM 0
335 #define PANEL_PROFILE_OLD 1
336 #define PANEL_PROFILE_NEW 2
337 #define PANEL_PROFILE_HANTRONIX 3
338 #define PANEL_PROFILE_NEXCOM 4
339 #define PANEL_PROFILE_LARGE 5
342 * Construct custom config from the kernel's configuration
344 #define DEFAULT_PARPORT 0
345 #define DEFAULT_PROFILE PANEL_PROFILE_LARGE
346 #define DEFAULT_KEYPAD_TYPE KEYPAD_TYPE_OLD
347 #define DEFAULT_LCD_TYPE LCD_TYPE_OLD
348 #define DEFAULT_LCD_HEIGHT 2
349 #define DEFAULT_LCD_WIDTH 40
350 #define DEFAULT_LCD_BWIDTH 40
351 #define DEFAULT_LCD_HWIDTH 64
352 #define DEFAULT_LCD_CHARSET LCD_CHARSET_NORMAL
353 #define DEFAULT_LCD_PROTO LCD_PROTO_PARALLEL
355 #define DEFAULT_LCD_PIN_E PIN_AUTOLF
356 #define DEFAULT_LCD_PIN_RS PIN_SELECP
357 #define DEFAULT_LCD_PIN_RW PIN_INITP
358 #define DEFAULT_LCD_PIN_SCL PIN_STROBE
359 #define DEFAULT_LCD_PIN_SDA PIN_D0
360 #define DEFAULT_LCD_PIN_BL PIN_NOT_SET
362 #ifdef CONFIG_PANEL_PARPORT
363 #undef DEFAULT_PARPORT
364 #define DEFAULT_PARPORT CONFIG_PANEL_PARPORT
367 #ifdef CONFIG_PANEL_PROFILE
368 #undef DEFAULT_PROFILE
369 #define DEFAULT_PROFILE CONFIG_PANEL_PROFILE
372 #if DEFAULT_PROFILE == 0 /* custom */
373 #ifdef CONFIG_PANEL_KEYPAD
374 #undef DEFAULT_KEYPAD_TYPE
375 #define DEFAULT_KEYPAD_TYPE CONFIG_PANEL_KEYPAD
378 #ifdef CONFIG_PANEL_LCD
379 #undef DEFAULT_LCD_TYPE
380 #define DEFAULT_LCD_TYPE CONFIG_PANEL_LCD
383 #ifdef CONFIG_PANEL_LCD_HEIGHT
384 #undef DEFAULT_LCD_HEIGHT
385 #define DEFAULT_LCD_HEIGHT CONFIG_PANEL_LCD_HEIGHT
388 #ifdef CONFIG_PANEL_LCD_WIDTH
389 #undef DEFAULT_LCD_WIDTH
390 #define DEFAULT_LCD_WIDTH CONFIG_PANEL_LCD_WIDTH
393 #ifdef CONFIG_PANEL_LCD_BWIDTH
394 #undef DEFAULT_LCD_BWIDTH
395 #define DEFAULT_LCD_BWIDTH CONFIG_PANEL_LCD_BWIDTH
398 #ifdef CONFIG_PANEL_LCD_HWIDTH
399 #undef DEFAULT_LCD_HWIDTH
400 #define DEFAULT_LCD_HWIDTH CONFIG_PANEL_LCD_HWIDTH
403 #ifdef CONFIG_PANEL_LCD_CHARSET
404 #undef DEFAULT_LCD_CHARSET
405 #define DEFAULT_LCD_CHARSET CONFIG_PANEL_LCD_CHARSET
408 #ifdef CONFIG_PANEL_LCD_PROTO
409 #undef DEFAULT_LCD_PROTO
410 #define DEFAULT_LCD_PROTO CONFIG_PANEL_LCD_PROTO
413 #ifdef CONFIG_PANEL_LCD_PIN_E
414 #undef DEFAULT_LCD_PIN_E
415 #define DEFAULT_LCD_PIN_E CONFIG_PANEL_LCD_PIN_E
418 #ifdef CONFIG_PANEL_LCD_PIN_RS
419 #undef DEFAULT_LCD_PIN_RS
420 #define DEFAULT_LCD_PIN_RS CONFIG_PANEL_LCD_PIN_RS
423 #ifdef CONFIG_PANEL_LCD_PIN_RW
424 #undef DEFAULT_LCD_PIN_RW
425 #define DEFAULT_LCD_PIN_RW CONFIG_PANEL_LCD_PIN_RW
428 #ifdef CONFIG_PANEL_LCD_PIN_SCL
429 #undef DEFAULT_LCD_PIN_SCL
430 #define DEFAULT_LCD_PIN_SCL CONFIG_PANEL_LCD_PIN_SCL
433 #ifdef CONFIG_PANEL_LCD_PIN_SDA
434 #undef DEFAULT_LCD_PIN_SDA
435 #define DEFAULT_LCD_PIN_SDA CONFIG_PANEL_LCD_PIN_SDA
438 #ifdef CONFIG_PANEL_LCD_PIN_BL
439 #undef DEFAULT_LCD_PIN_BL
440 #define DEFAULT_LCD_PIN_BL CONFIG_PANEL_LCD_PIN_BL
443 #endif /* DEFAULT_PROFILE == 0 */
445 /* global variables */
447 /* Device single-open policy control */
448 static atomic_t lcd_available
= ATOMIC_INIT(1);
449 static atomic_t keypad_available
= ATOMIC_INIT(1);
451 static struct pardevice
*pprt
;
453 static int keypad_initialized
;
455 static char init_in_progress
;
457 static void (*lcd_write_cmd
)(int);
458 static void (*lcd_write_data
)(int);
459 static void (*lcd_clear_fast
)(void);
461 static DEFINE_SPINLOCK(pprt_lock
);
462 static struct timer_list scan_timer
;
464 MODULE_DESCRIPTION("Generic parallel port LCD/Keypad driver");
466 static int parport
= DEFAULT_PARPORT
;
467 module_param(parport
, int, 0000);
468 MODULE_PARM_DESC(parport
, "Parallel port index (0=lpt1, 1=lpt2, ...)");
470 static int profile
= DEFAULT_PROFILE
;
471 module_param(profile
, int, 0000);
472 MODULE_PARM_DESC(profile
,
473 "1=16x2 old kp; 2=serial 16x2, new kp; 3=16x2 hantronix; "
474 "4=16x2 nexcom; default=40x2, old kp");
476 static int keypad_type
= NOT_SET
;
477 module_param(keypad_type
, int, 0000);
478 MODULE_PARM_DESC(keypad_type
,
479 "Keypad type: 0=none, 1=old 6 keys, 2=new 6+1 keys, 3=nexcom 4 keys");
481 static int lcd_type
= NOT_SET
;
482 module_param(lcd_type
, int, 0000);
483 MODULE_PARM_DESC(lcd_type
,
484 "LCD type: 0=none, 1=old //, 2=serial ks0074, 3=hantronix //, 4=nexcom //, 5=compiled-in");
486 static int lcd_height
= NOT_SET
;
487 module_param(lcd_height
, int, 0000);
488 MODULE_PARM_DESC(lcd_height
, "Number of lines on the LCD");
490 static int lcd_width
= NOT_SET
;
491 module_param(lcd_width
, int, 0000);
492 MODULE_PARM_DESC(lcd_width
, "Number of columns on the LCD");
494 static int lcd_bwidth
= NOT_SET
; /* internal buffer width (usually 40) */
495 module_param(lcd_bwidth
, int, 0000);
496 MODULE_PARM_DESC(lcd_bwidth
, "Internal LCD line width (40)");
498 static int lcd_hwidth
= NOT_SET
; /* hardware buffer width (usually 64) */
499 module_param(lcd_hwidth
, int, 0000);
500 MODULE_PARM_DESC(lcd_hwidth
, "LCD line hardware address (64)");
502 static int lcd_charset
= NOT_SET
;
503 module_param(lcd_charset
, int, 0000);
504 MODULE_PARM_DESC(lcd_charset
, "LCD character set: 0=standard, 1=KS0074");
506 static int lcd_proto
= NOT_SET
;
507 module_param(lcd_proto
, int, 0000);
508 MODULE_PARM_DESC(lcd_proto
,
509 "LCD communication: 0=parallel (//), 1=serial, 2=TI LCD Interface");
512 * These are the parallel port pins the LCD control signals are connected to.
513 * Set this to 0 if the signal is not used. Set it to its opposite value
514 * (negative) if the signal is negated. -MAXINT is used to indicate that the
515 * pin has not been explicitly specified.
517 * WARNING! no check will be performed about collisions with keypad !
520 static int lcd_e_pin
= PIN_NOT_SET
;
521 module_param(lcd_e_pin
, int, 0000);
522 MODULE_PARM_DESC(lcd_e_pin
,
523 "# of the // port pin connected to LCD 'E' signal, with polarity (-17..17)");
525 static int lcd_rs_pin
= PIN_NOT_SET
;
526 module_param(lcd_rs_pin
, int, 0000);
527 MODULE_PARM_DESC(lcd_rs_pin
,
528 "# of the // port pin connected to LCD 'RS' signal, with polarity (-17..17)");
530 static int lcd_rw_pin
= PIN_NOT_SET
;
531 module_param(lcd_rw_pin
, int, 0000);
532 MODULE_PARM_DESC(lcd_rw_pin
,
533 "# of the // port pin connected to LCD 'RW' signal, with polarity (-17..17)");
535 static int lcd_cl_pin
= PIN_NOT_SET
;
536 module_param(lcd_cl_pin
, int, 0000);
537 MODULE_PARM_DESC(lcd_cl_pin
,
538 "# of the // port pin connected to serial LCD 'SCL' signal, with polarity (-17..17)");
540 static int lcd_da_pin
= PIN_NOT_SET
;
541 module_param(lcd_da_pin
, int, 0000);
542 MODULE_PARM_DESC(lcd_da_pin
,
543 "# of the // port pin connected to serial LCD 'SDA' signal, with polarity (-17..17)");
545 static int lcd_bl_pin
= PIN_NOT_SET
;
546 module_param(lcd_bl_pin
, int, 0000);
547 MODULE_PARM_DESC(lcd_bl_pin
,
548 "# of the // port pin connected to LCD backlight, with polarity (-17..17)");
550 /* Deprecated module parameters - consider not using them anymore */
552 static int lcd_enabled
= NOT_SET
;
553 module_param(lcd_enabled
, int, 0000);
554 MODULE_PARM_DESC(lcd_enabled
, "Deprecated option, use lcd_type instead");
556 static int keypad_enabled
= NOT_SET
;
557 module_param(keypad_enabled
, int, 0000);
558 MODULE_PARM_DESC(keypad_enabled
, "Deprecated option, use keypad_type instead");
561 static const unsigned char *lcd_char_conv
;
563 /* for some LCD drivers (ks0074) we need a charset conversion table. */
564 static const unsigned char lcd_char_conv_ks0074
[256] = {
565 /* 0|8 1|9 2|A 3|B 4|C 5|D 6|E 7|F */
566 /* 0x00 */ 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
567 /* 0x08 */ 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
568 /* 0x10 */ 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
569 /* 0x18 */ 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
570 /* 0x20 */ 0x20, 0x21, 0x22, 0x23, 0xa2, 0x25, 0x26, 0x27,
571 /* 0x28 */ 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
572 /* 0x30 */ 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
573 /* 0x38 */ 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
574 /* 0x40 */ 0xa0, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
575 /* 0x48 */ 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
576 /* 0x50 */ 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
577 /* 0x58 */ 0x58, 0x59, 0x5a, 0xfa, 0xfb, 0xfc, 0x1d, 0xc4,
578 /* 0x60 */ 0x96, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
579 /* 0x68 */ 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
580 /* 0x70 */ 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
581 /* 0x78 */ 0x78, 0x79, 0x7a, 0xfd, 0xfe, 0xff, 0xce, 0x20,
582 /* 0x80 */ 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
583 /* 0x88 */ 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
584 /* 0x90 */ 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
585 /* 0x98 */ 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
586 /* 0xA0 */ 0x20, 0x40, 0xb1, 0xa1, 0x24, 0xa3, 0xfe, 0x5f,
587 /* 0xA8 */ 0x22, 0xc8, 0x61, 0x14, 0x97, 0x2d, 0xad, 0x96,
588 /* 0xB0 */ 0x80, 0x8c, 0x82, 0x83, 0x27, 0x8f, 0x86, 0xdd,
589 /* 0xB8 */ 0x2c, 0x81, 0x6f, 0x15, 0x8b, 0x8a, 0x84, 0x60,
590 /* 0xC0 */ 0xe2, 0xe2, 0xe2, 0x5b, 0x5b, 0xae, 0xbc, 0xa9,
591 /* 0xC8 */ 0xc5, 0xbf, 0xc6, 0xf1, 0xe3, 0xe3, 0xe3, 0xe3,
592 /* 0xD0 */ 0x44, 0x5d, 0xa8, 0xe4, 0xec, 0xec, 0x5c, 0x78,
593 /* 0xD8 */ 0xab, 0xa6, 0xe5, 0x5e, 0x5e, 0xe6, 0xaa, 0xbe,
594 /* 0xE0 */ 0x7f, 0xe7, 0xaf, 0x7b, 0x7b, 0xaf, 0xbd, 0xc8,
595 /* 0xE8 */ 0xa4, 0xa5, 0xc7, 0xf6, 0xa7, 0xe8, 0x69, 0x69,
596 /* 0xF0 */ 0xed, 0x7d, 0xa8, 0xe4, 0xec, 0x5c, 0x5c, 0x25,
597 /* 0xF8 */ 0xac, 0xa6, 0xea, 0xef, 0x7e, 0xeb, 0xb2, 0x79,
600 static const char old_keypad_profile
[][4][9] = {
601 {"S0", "Left\n", "Left\n", ""},
602 {"S1", "Down\n", "Down\n", ""},
603 {"S2", "Up\n", "Up\n", ""},
604 {"S3", "Right\n", "Right\n", ""},
605 {"S4", "Esc\n", "Esc\n", ""},
606 {"S5", "Ret\n", "Ret\n", ""},
610 /* signals, press, repeat, release */
611 static const char new_keypad_profile
[][4][9] = {
612 {"S0", "Left\n", "Left\n", ""},
613 {"S1", "Down\n", "Down\n", ""},
614 {"S2", "Up\n", "Up\n", ""},
615 {"S3", "Right\n", "Right\n", ""},
616 {"S4s5", "", "Esc\n", "Esc\n"},
617 {"s4S5", "", "Ret\n", "Ret\n"},
618 {"S4S5", "Help\n", "", ""},
619 /* add new signals above this line */
623 /* signals, press, repeat, release */
624 static const char nexcom_keypad_profile
[][4][9] = {
625 {"a-p-e-", "Down\n", "Down\n", ""},
626 {"a-p-E-", "Ret\n", "Ret\n", ""},
627 {"a-P-E-", "Esc\n", "Esc\n", ""},
628 {"a-P-e-", "Up\n", "Up\n", ""},
629 /* add new signals above this line */
633 static const char (*keypad_profile
)[4][9] = old_keypad_profile
;
635 /* FIXME: this should be converted to a bit array containing signals states */
637 unsigned char e
; /* parallel LCD E (data latch on falling edge) */
638 unsigned char rs
; /* parallel LCD RS (0 = cmd, 1 = data) */
639 unsigned char rw
; /* parallel LCD R/W (0 = W, 1 = R) */
640 unsigned char bl
; /* parallel LCD backlight (0 = off, 1 = on) */
641 unsigned char cl
; /* serial LCD clock (latch on rising edge) */
642 unsigned char da
; /* serial LCD data */
645 static void init_scan_timer(void);
647 /* sets data port bits according to current signals values */
648 static int set_data_bits(void)
653 for (bit
= 0; bit
< LCD_BITS
; bit
++)
654 val
&= lcd_bits
[LCD_PORT_D
][bit
][BIT_MSK
];
656 val
|= lcd_bits
[LCD_PORT_D
][LCD_BIT_E
][bits
.e
]
657 | lcd_bits
[LCD_PORT_D
][LCD_BIT_RS
][bits
.rs
]
658 | lcd_bits
[LCD_PORT_D
][LCD_BIT_RW
][bits
.rw
]
659 | lcd_bits
[LCD_PORT_D
][LCD_BIT_BL
][bits
.bl
]
660 | lcd_bits
[LCD_PORT_D
][LCD_BIT_CL
][bits
.cl
]
661 | lcd_bits
[LCD_PORT_D
][LCD_BIT_DA
][bits
.da
];
667 /* sets ctrl port bits according to current signals values */
668 static int set_ctrl_bits(void)
673 for (bit
= 0; bit
< LCD_BITS
; bit
++)
674 val
&= lcd_bits
[LCD_PORT_C
][bit
][BIT_MSK
];
676 val
|= lcd_bits
[LCD_PORT_C
][LCD_BIT_E
][bits
.e
]
677 | lcd_bits
[LCD_PORT_C
][LCD_BIT_RS
][bits
.rs
]
678 | lcd_bits
[LCD_PORT_C
][LCD_BIT_RW
][bits
.rw
]
679 | lcd_bits
[LCD_PORT_C
][LCD_BIT_BL
][bits
.bl
]
680 | lcd_bits
[LCD_PORT_C
][LCD_BIT_CL
][bits
.cl
]
681 | lcd_bits
[LCD_PORT_C
][LCD_BIT_DA
][bits
.da
];
687 /* sets ctrl & data port bits according to current signals values */
688 static void panel_set_bits(void)
695 * Converts a parallel port pin (from -25 to 25) to data and control ports
696 * masks, and data and control port bits. The signal will be considered
697 * unconnected if it's on pin 0 or an invalid pin (<-25 or >25).
699 * Result will be used this way :
700 * out(dport, in(dport) & d_val[2] | d_val[signal_state])
701 * out(cport, in(cport) & c_val[2] | c_val[signal_state])
703 static void pin_to_bits(int pin
, unsigned char *d_val
, unsigned char *c_val
)
705 int d_bit
, c_bit
, inv
;
725 case PIN_STROBE
: /* strobe, inverted */
729 case PIN_D0
...PIN_D7
: /* D0 - D7 = 2 - 9 */
730 d_bit
= 1 << (pin
- 2);
732 case PIN_AUTOLF
: /* autofeed, inverted */
736 case PIN_INITP
: /* init, direct */
739 case PIN_SELECP
: /* select_in, inverted */
743 default: /* unknown pin, ignore */
756 /* sleeps that many milliseconds with a reschedule */
757 static void long_sleep(int ms
)
759 if (in_interrupt()) {
762 current
->state
= TASK_INTERRUPTIBLE
;
763 schedule_timeout((ms
* HZ
+ 999) / 1000);
767 /* send a serial byte to the LCD panel. The caller is responsible for locking
769 static void lcd_send_serial(int byte
)
773 /* the data bit is set on D0, and the clock on STROBE.
774 * LCD reads D0 on STROBE's rising edge. */
775 for (bit
= 0; bit
< 8; bit
++) {
776 bits
.cl
= BIT_CLR
; /* CLK low */
780 udelay(2); /* maintain the data during 2 us before CLK up */
781 bits
.cl
= BIT_SET
; /* CLK high */
783 udelay(1); /* maintain the strobe during 1 us */
788 /* turn the backlight on or off */
789 static void lcd_backlight(int on
)
791 if (lcd
.pins
.bl
== PIN_NONE
)
794 /* The backlight is activated by setting the AUTOFEED line to +5V */
795 spin_lock_irq(&pprt_lock
);
798 spin_unlock_irq(&pprt_lock
);
801 /* send a command to the LCD panel in serial mode */
802 static void lcd_write_cmd_s(int cmd
)
804 spin_lock_irq(&pprt_lock
);
805 lcd_send_serial(0x1F); /* R/W=W, RS=0 */
806 lcd_send_serial(cmd
& 0x0F);
807 lcd_send_serial((cmd
>> 4) & 0x0F);
808 udelay(40); /* the shortest command takes at least 40 us */
809 spin_unlock_irq(&pprt_lock
);
812 /* send data to the LCD panel in serial mode */
813 static void lcd_write_data_s(int data
)
815 spin_lock_irq(&pprt_lock
);
816 lcd_send_serial(0x5F); /* R/W=W, RS=1 */
817 lcd_send_serial(data
& 0x0F);
818 lcd_send_serial((data
>> 4) & 0x0F);
819 udelay(40); /* the shortest data takes at least 40 us */
820 spin_unlock_irq(&pprt_lock
);
823 /* send a command to the LCD panel in 8 bits parallel mode */
824 static void lcd_write_cmd_p8(int cmd
)
826 spin_lock_irq(&pprt_lock
);
827 /* present the data to the data port */
829 udelay(20); /* maintain the data during 20 us before the strobe */
836 udelay(40); /* maintain the strobe during 40 us */
841 udelay(120); /* the shortest command takes at least 120 us */
842 spin_unlock_irq(&pprt_lock
);
845 /* send data to the LCD panel in 8 bits parallel mode */
846 static void lcd_write_data_p8(int data
)
848 spin_lock_irq(&pprt_lock
);
849 /* present the data to the data port */
851 udelay(20); /* maintain the data during 20 us before the strobe */
858 udelay(40); /* maintain the strobe during 40 us */
863 udelay(45); /* the shortest data takes at least 45 us */
864 spin_unlock_irq(&pprt_lock
);
867 /* send a command to the TI LCD panel */
868 static void lcd_write_cmd_tilcd(int cmd
)
870 spin_lock_irq(&pprt_lock
);
871 /* present the data to the control port */
874 spin_unlock_irq(&pprt_lock
);
877 /* send data to the TI LCD panel */
878 static void lcd_write_data_tilcd(int data
)
880 spin_lock_irq(&pprt_lock
);
881 /* present the data to the data port */
884 spin_unlock_irq(&pprt_lock
);
887 static void lcd_gotoxy(void)
889 lcd_write_cmd(0x80 /* set DDRAM address */
890 | (lcd
.addr
.y
? lcd
.hwidth
: 0)
891 /* we force the cursor to stay at the end of the
892 line if it wants to go farther */
893 | ((lcd
.addr
.x
< lcd
.bwidth
) ? lcd
.addr
.x
&
894 (lcd
.hwidth
- 1) : lcd
.bwidth
- 1));
897 static void lcd_print(char c
)
899 if (lcd
.addr
.x
< lcd
.bwidth
) {
900 if (lcd_char_conv
!= NULL
)
901 c
= lcd_char_conv
[(unsigned char)c
];
905 /* prevents the cursor from wrapping onto the next line */
906 if (lcd
.addr
.x
== lcd
.bwidth
)
910 /* fills the display with spaces and resets X/Y */
911 static void lcd_clear_fast_s(void)
919 spin_lock_irq(&pprt_lock
);
920 for (pos
= 0; pos
< lcd
.height
* lcd
.hwidth
; pos
++) {
921 lcd_send_serial(0x5F); /* R/W=W, RS=1 */
922 lcd_send_serial(' ' & 0x0F);
923 lcd_send_serial((' ' >> 4) & 0x0F);
924 udelay(40); /* the shortest data takes at least 40 us */
926 spin_unlock_irq(&pprt_lock
);
933 /* fills the display with spaces and resets X/Y */
934 static void lcd_clear_fast_p8(void)
942 spin_lock_irq(&pprt_lock
);
943 for (pos
= 0; pos
< lcd
.height
* lcd
.hwidth
; pos
++) {
944 /* present the data to the data port */
947 /* maintain the data during 20 us before the strobe */
955 /* maintain the strobe during 40 us */
961 /* the shortest data takes at least 45 us */
964 spin_unlock_irq(&pprt_lock
);
971 /* fills the display with spaces and resets X/Y */
972 static void lcd_clear_fast_tilcd(void)
980 spin_lock_irq(&pprt_lock
);
981 for (pos
= 0; pos
< lcd
.height
* lcd
.hwidth
; pos
++) {
982 /* present the data to the data port */
987 spin_unlock_irq(&pprt_lock
);
994 /* clears the display and resets X/Y */
995 static void lcd_clear_display(void)
997 lcd_write_cmd(0x01); /* clear display */
1000 /* we must wait a few milliseconds (15) */
1004 static void lcd_init_display(void)
1006 lcd
.flags
= ((lcd
.height
> 1) ? LCD_FLAG_N
: 0)
1007 | LCD_FLAG_D
| LCD_FLAG_C
| LCD_FLAG_B
;
1009 long_sleep(20); /* wait 20 ms after power-up for the paranoid */
1011 lcd_write_cmd(0x30); /* 8bits, 1 line, small fonts */
1013 lcd_write_cmd(0x30); /* 8bits, 1 line, small fonts */
1015 lcd_write_cmd(0x30); /* 8bits, 1 line, small fonts */
1018 lcd_write_cmd(0x30 /* set font height and lines number */
1019 | ((lcd
.flags
& LCD_FLAG_F
) ? 4 : 0)
1020 | ((lcd
.flags
& LCD_FLAG_N
) ? 8 : 0)
1024 lcd_write_cmd(0x08); /* display off, cursor off, blink off */
1027 lcd_write_cmd(0x08 /* set display mode */
1028 | ((lcd
.flags
& LCD_FLAG_D
) ? 4 : 0)
1029 | ((lcd
.flags
& LCD_FLAG_C
) ? 2 : 0)
1030 | ((lcd
.flags
& LCD_FLAG_B
) ? 1 : 0)
1033 lcd_backlight((lcd
.flags
& LCD_FLAG_L
) ? 1 : 0);
1037 /* entry mode set : increment, cursor shifting */
1038 lcd_write_cmd(0x06);
1040 lcd_clear_display();
1044 * These are the file operation function for user access to /dev/lcd
1045 * This function can also be called from inside the kernel, by
1046 * setting file and ppos to NULL.
1050 static inline int handle_lcd_special_code(void)
1052 /* LCD special codes */
1056 char *esc
= lcd
.esc_seq
.buf
+ 2;
1057 int oldflags
= lcd
.flags
;
1059 /* check for display mode flags */
1061 case 'D': /* Display ON */
1062 lcd
.flags
|= LCD_FLAG_D
;
1065 case 'd': /* Display OFF */
1066 lcd
.flags
&= ~LCD_FLAG_D
;
1069 case 'C': /* Cursor ON */
1070 lcd
.flags
|= LCD_FLAG_C
;
1073 case 'c': /* Cursor OFF */
1074 lcd
.flags
&= ~LCD_FLAG_C
;
1077 case 'B': /* Blink ON */
1078 lcd
.flags
|= LCD_FLAG_B
;
1081 case 'b': /* Blink OFF */
1082 lcd
.flags
&= ~LCD_FLAG_B
;
1085 case '+': /* Back light ON */
1086 lcd
.flags
|= LCD_FLAG_L
;
1089 case '-': /* Back light OFF */
1090 lcd
.flags
&= ~LCD_FLAG_L
;
1094 /* flash back light using the keypad timer */
1095 if (scan_timer
.function
!= NULL
) {
1096 if (lcd
.light_tempo
== 0
1097 && ((lcd
.flags
& LCD_FLAG_L
) == 0))
1099 lcd
.light_tempo
= FLASH_LIGHT_TEMPO
;
1103 case 'f': /* Small Font */
1104 lcd
.flags
&= ~LCD_FLAG_F
;
1107 case 'F': /* Large Font */
1108 lcd
.flags
|= LCD_FLAG_F
;
1111 case 'n': /* One Line */
1112 lcd
.flags
&= ~LCD_FLAG_N
;
1115 case 'N': /* Two Lines */
1116 lcd
.flags
|= LCD_FLAG_N
;
1118 case 'l': /* Shift Cursor Left */
1119 if (lcd
.addr
.x
> 0) {
1120 /* back one char if not at end of line */
1121 if (lcd
.addr
.x
< lcd
.bwidth
)
1122 lcd_write_cmd(0x10);
1127 case 'r': /* shift cursor right */
1128 if (lcd
.addr
.x
< lcd
.width
) {
1129 /* allow the cursor to pass the end of the line */
1132 lcd_write_cmd(0x14);
1137 case 'L': /* shift display left */
1139 lcd_write_cmd(0x18);
1142 case 'R': /* shift display right */
1144 lcd_write_cmd(0x1C);
1147 case 'k': { /* kill end of line */
1150 for (x
= lcd
.addr
.x
; x
< lcd
.bwidth
; x
++)
1151 lcd_write_data(' ');
1153 /* restore cursor position */
1158 case 'I': /* reinitialize display */
1164 /* Generator : LGcxxxxx...xx; must have <c> between '0'
1165 * and '7', representing the numerical ASCII code of the
1166 * redefined character, and <xx...xx> a sequence of 16
1167 * hex digits representing 8 bytes for each character.
1168 * Most LCDs will only use 5 lower bits of the 7 first
1172 unsigned char cgbytes
[8];
1173 unsigned char cgaddr
;
1179 if (strchr(esc
, ';') == NULL
)
1184 cgaddr
= *(esc
++) - '0';
1193 while (*esc
&& cgoffset
< 8) {
1195 if (*esc
>= '0' && *esc
<= '9') {
1196 value
|= (*esc
- '0') << shift
;
1197 } else if (*esc
>= 'A' && *esc
<= 'Z') {
1198 value
|= (*esc
- 'A' + 10) << shift
;
1199 } else if (*esc
>= 'a' && *esc
<= 'z') {
1200 value
|= (*esc
- 'a' + 10) << shift
;
1207 cgbytes
[cgoffset
++] = value
;
1214 lcd_write_cmd(0x40 | (cgaddr
* 8));
1215 for (addr
= 0; addr
< cgoffset
; addr
++)
1216 lcd_write_data(cgbytes
[addr
]);
1218 /* ensures that we stop writing to CGRAM */
1223 case 'x': /* gotoxy : LxXXX[yYYY]; */
1224 case 'y': /* gotoxy : LyYYY[xXXX]; */
1225 if (strchr(esc
, ';') == NULL
)
1231 if (kstrtoul(esc
, 10, &lcd
.addr
.x
) < 0)
1233 } else if (*esc
== 'y') {
1235 if (kstrtoul(esc
, 10, &lcd
.addr
.y
) < 0)
1247 /* Check whether one flag was changed */
1248 if (oldflags
!= lcd
.flags
) {
1249 /* check whether one of B,C,D flags were changed */
1250 if ((oldflags
^ lcd
.flags
) &
1251 (LCD_FLAG_B
| LCD_FLAG_C
| LCD_FLAG_D
))
1252 /* set display mode */
1254 | ((lcd
.flags
& LCD_FLAG_D
) ? 4 : 0)
1255 | ((lcd
.flags
& LCD_FLAG_C
) ? 2 : 0)
1256 | ((lcd
.flags
& LCD_FLAG_B
) ? 1 : 0));
1257 /* check whether one of F,N flags was changed */
1258 else if ((oldflags
^ lcd
.flags
) & (LCD_FLAG_F
| LCD_FLAG_N
))
1260 | ((lcd
.flags
& LCD_FLAG_F
) ? 4 : 0)
1261 | ((lcd
.flags
& LCD_FLAG_N
) ? 8 : 0));
1262 /* check whether L flag was changed */
1263 else if ((oldflags
^ lcd
.flags
) & (LCD_FLAG_L
)) {
1264 if (lcd
.flags
& (LCD_FLAG_L
))
1266 else if (lcd
.light_tempo
== 0)
1267 /* switch off the light only when the tempo
1276 static void lcd_write_char(char c
)
1278 /* first, we'll test if we're in escape mode */
1279 if ((c
!= '\n') && lcd
.esc_seq
.len
>= 0) {
1280 /* yes, let's add this char to the buffer */
1281 lcd
.esc_seq
.buf
[lcd
.esc_seq
.len
++] = c
;
1282 lcd
.esc_seq
.buf
[lcd
.esc_seq
.len
] = 0;
1284 /* aborts any previous escape sequence */
1285 lcd
.esc_seq
.len
= -1;
1288 case LCD_ESCAPE_CHAR
:
1289 /* start of an escape sequence */
1290 lcd
.esc_seq
.len
= 0;
1291 lcd
.esc_seq
.buf
[lcd
.esc_seq
.len
] = 0;
1294 /* go back one char and clear it */
1295 if (lcd
.addr
.x
> 0) {
1296 /* check if we're not at the
1298 if (lcd
.addr
.x
< lcd
.bwidth
)
1300 lcd_write_cmd(0x10);
1303 /* replace with a space */
1304 lcd_write_data(' ');
1305 /* back one char again */
1306 lcd_write_cmd(0x10);
1309 /* quickly clear the display */
1313 /* flush the remainder of the current line and
1314 go to the beginning of the next line */
1315 for (; lcd
.addr
.x
< lcd
.bwidth
; lcd
.addr
.x
++)
1316 lcd_write_data(' ');
1318 lcd
.addr
.y
= (lcd
.addr
.y
+ 1) % lcd
.height
;
1322 /* go to the beginning of the same line */
1327 /* print a space instead of the tab */
1331 /* simply print this char */
1337 /* now we'll see if we're in an escape mode and if the current
1338 escape sequence can be understood. */
1339 if (lcd
.esc_seq
.len
>= 2) {
1342 if (!strcmp(lcd
.esc_seq
.buf
, "[2J")) {
1343 /* clear the display */
1346 } else if (!strcmp(lcd
.esc_seq
.buf
, "[H")) {
1347 /* cursor to home */
1353 /* codes starting with ^[[L */
1354 else if ((lcd
.esc_seq
.len
>= 3) &&
1355 (lcd
.esc_seq
.buf
[0] == '[') &&
1356 (lcd
.esc_seq
.buf
[1] == 'L')) {
1357 processed
= handle_lcd_special_code();
1360 /* LCD special escape codes */
1361 /* flush the escape sequence if it's been processed
1362 or if it is getting too long. */
1363 if (processed
|| (lcd
.esc_seq
.len
>= LCD_ESCAPE_LEN
))
1364 lcd
.esc_seq
.len
= -1;
1365 } /* escape codes */
1368 static ssize_t
lcd_write(struct file
*file
,
1369 const char __user
*buf
, size_t count
, loff_t
*ppos
)
1371 const char __user
*tmp
= buf
;
1374 for (; count
-- > 0; (*ppos
)++, tmp
++) {
1375 if (!in_interrupt() && (((count
+ 1) & 0x1f) == 0))
1376 /* let's be a little nice with other processes
1377 that need some CPU */
1380 if (get_user(c
, tmp
))
1389 static int lcd_open(struct inode
*inode
, struct file
*file
)
1391 if (!atomic_dec_and_test(&lcd_available
))
1392 return -EBUSY
; /* open only once at a time */
1394 if (file
->f_mode
& FMODE_READ
) /* device is write-only */
1397 if (lcd
.must_clear
) {
1398 lcd_clear_display();
1399 lcd
.must_clear
= false;
1401 return nonseekable_open(inode
, file
);
1404 static int lcd_release(struct inode
*inode
, struct file
*file
)
1406 atomic_inc(&lcd_available
);
1410 static const struct file_operations lcd_fops
= {
1413 .release
= lcd_release
,
1414 .llseek
= no_llseek
,
1417 static struct miscdevice lcd_dev
= {
1423 /* public function usable from the kernel for any purpose */
1424 static void panel_lcd_print(const char *s
)
1426 const char *tmp
= s
;
1427 int count
= strlen(s
);
1429 if (lcd
.enabled
&& lcd
.initialized
) {
1430 for (; count
-- > 0; tmp
++) {
1431 if (!in_interrupt() && (((count
+ 1) & 0x1f) == 0))
1432 /* let's be a little nice with other processes
1433 that need some CPU */
1436 lcd_write_char(*tmp
);
1441 /* initialize the LCD driver */
1442 static void lcd_init(void)
1444 switch (selected_lcd_type
) {
1446 /* parallel mode, 8 bits */
1447 lcd
.proto
= LCD_PROTO_PARALLEL
;
1448 lcd
.charset
= LCD_CHARSET_NORMAL
;
1449 lcd
.pins
.e
= PIN_STROBE
;
1450 lcd
.pins
.rs
= PIN_AUTOLF
;
1457 case LCD_TYPE_KS0074
:
1458 /* serial mode, ks0074 */
1459 lcd
.proto
= LCD_PROTO_SERIAL
;
1460 lcd
.charset
= LCD_CHARSET_KS0074
;
1461 lcd
.pins
.bl
= PIN_AUTOLF
;
1462 lcd
.pins
.cl
= PIN_STROBE
;
1463 lcd
.pins
.da
= PIN_D0
;
1470 case LCD_TYPE_NEXCOM
:
1471 /* parallel mode, 8 bits, generic */
1472 lcd
.proto
= LCD_PROTO_PARALLEL
;
1473 lcd
.charset
= LCD_CHARSET_NORMAL
;
1474 lcd
.pins
.e
= PIN_AUTOLF
;
1475 lcd
.pins
.rs
= PIN_SELECP
;
1476 lcd
.pins
.rw
= PIN_INITP
;
1483 case LCD_TYPE_CUSTOM
:
1484 /* customer-defined */
1485 lcd
.proto
= DEFAULT_LCD_PROTO
;
1486 lcd
.charset
= DEFAULT_LCD_CHARSET
;
1487 /* default geometry will be set later */
1489 case LCD_TYPE_HANTRONIX
:
1490 /* parallel mode, 8 bits, hantronix-like */
1492 lcd
.proto
= LCD_PROTO_PARALLEL
;
1493 lcd
.charset
= LCD_CHARSET_NORMAL
;
1494 lcd
.pins
.e
= PIN_STROBE
;
1495 lcd
.pins
.rs
= PIN_SELECP
;
1504 /* Overwrite with module params set on loading */
1505 if (lcd_height
!= NOT_SET
)
1506 lcd
.height
= lcd_height
;
1507 if (lcd_width
!= NOT_SET
)
1508 lcd
.width
= lcd_width
;
1509 if (lcd_bwidth
!= NOT_SET
)
1510 lcd
.bwidth
= lcd_bwidth
;
1511 if (lcd_hwidth
!= NOT_SET
)
1512 lcd
.hwidth
= lcd_hwidth
;
1513 if (lcd_charset
!= NOT_SET
)
1514 lcd
.charset
= lcd_charset
;
1515 if (lcd_proto
!= NOT_SET
)
1516 lcd
.proto
= lcd_proto
;
1517 if (lcd_e_pin
!= PIN_NOT_SET
)
1518 lcd
.pins
.e
= lcd_e_pin
;
1519 if (lcd_rs_pin
!= PIN_NOT_SET
)
1520 lcd
.pins
.rs
= lcd_rs_pin
;
1521 if (lcd_rw_pin
!= PIN_NOT_SET
)
1522 lcd
.pins
.rw
= lcd_rw_pin
;
1523 if (lcd_cl_pin
!= PIN_NOT_SET
)
1524 lcd
.pins
.cl
= lcd_cl_pin
;
1525 if (lcd_da_pin
!= PIN_NOT_SET
)
1526 lcd
.pins
.da
= lcd_da_pin
;
1527 if (lcd_bl_pin
!= PIN_NOT_SET
)
1528 lcd
.pins
.bl
= lcd_bl_pin
;
1530 /* this is used to catch wrong and default values */
1532 lcd
.width
= DEFAULT_LCD_WIDTH
;
1533 if (lcd
.bwidth
<= 0)
1534 lcd
.bwidth
= DEFAULT_LCD_BWIDTH
;
1535 if (lcd
.hwidth
<= 0)
1536 lcd
.hwidth
= DEFAULT_LCD_HWIDTH
;
1537 if (lcd
.height
<= 0)
1538 lcd
.height
= DEFAULT_LCD_HEIGHT
;
1540 if (lcd
.proto
== LCD_PROTO_SERIAL
) { /* SERIAL */
1541 lcd_write_cmd
= lcd_write_cmd_s
;
1542 lcd_write_data
= lcd_write_data_s
;
1543 lcd_clear_fast
= lcd_clear_fast_s
;
1545 if (lcd
.pins
.cl
== PIN_NOT_SET
)
1546 lcd
.pins
.cl
= DEFAULT_LCD_PIN_SCL
;
1547 if (lcd
.pins
.da
== PIN_NOT_SET
)
1548 lcd
.pins
.da
= DEFAULT_LCD_PIN_SDA
;
1550 } else if (lcd
.proto
== LCD_PROTO_PARALLEL
) { /* PARALLEL */
1551 lcd_write_cmd
= lcd_write_cmd_p8
;
1552 lcd_write_data
= lcd_write_data_p8
;
1553 lcd_clear_fast
= lcd_clear_fast_p8
;
1555 if (lcd
.pins
.e
== PIN_NOT_SET
)
1556 lcd
.pins
.e
= DEFAULT_LCD_PIN_E
;
1557 if (lcd
.pins
.rs
== PIN_NOT_SET
)
1558 lcd
.pins
.rs
= DEFAULT_LCD_PIN_RS
;
1559 if (lcd
.pins
.rw
== PIN_NOT_SET
)
1560 lcd
.pins
.rw
= DEFAULT_LCD_PIN_RW
;
1562 lcd_write_cmd
= lcd_write_cmd_tilcd
;
1563 lcd_write_data
= lcd_write_data_tilcd
;
1564 lcd_clear_fast
= lcd_clear_fast_tilcd
;
1567 if (lcd
.pins
.bl
== PIN_NOT_SET
)
1568 lcd
.pins
.bl
= DEFAULT_LCD_PIN_BL
;
1570 if (lcd
.pins
.e
== PIN_NOT_SET
)
1571 lcd
.pins
.e
= PIN_NONE
;
1572 if (lcd
.pins
.rs
== PIN_NOT_SET
)
1573 lcd
.pins
.rs
= PIN_NONE
;
1574 if (lcd
.pins
.rw
== PIN_NOT_SET
)
1575 lcd
.pins
.rw
= PIN_NONE
;
1576 if (lcd
.pins
.bl
== PIN_NOT_SET
)
1577 lcd
.pins
.bl
= PIN_NONE
;
1578 if (lcd
.pins
.cl
== PIN_NOT_SET
)
1579 lcd
.pins
.cl
= PIN_NONE
;
1580 if (lcd
.pins
.da
== PIN_NOT_SET
)
1581 lcd
.pins
.da
= PIN_NONE
;
1583 if (lcd
.charset
== NOT_SET
)
1584 lcd
.charset
= DEFAULT_LCD_CHARSET
;
1586 if (lcd
.charset
== LCD_CHARSET_KS0074
)
1587 lcd_char_conv
= lcd_char_conv_ks0074
;
1589 lcd_char_conv
= NULL
;
1591 if (lcd
.pins
.bl
!= PIN_NONE
)
1594 pin_to_bits(lcd
.pins
.e
, lcd_bits
[LCD_PORT_D
][LCD_BIT_E
],
1595 lcd_bits
[LCD_PORT_C
][LCD_BIT_E
]);
1596 pin_to_bits(lcd
.pins
.rs
, lcd_bits
[LCD_PORT_D
][LCD_BIT_RS
],
1597 lcd_bits
[LCD_PORT_C
][LCD_BIT_RS
]);
1598 pin_to_bits(lcd
.pins
.rw
, lcd_bits
[LCD_PORT_D
][LCD_BIT_RW
],
1599 lcd_bits
[LCD_PORT_C
][LCD_BIT_RW
]);
1600 pin_to_bits(lcd
.pins
.bl
, lcd_bits
[LCD_PORT_D
][LCD_BIT_BL
],
1601 lcd_bits
[LCD_PORT_C
][LCD_BIT_BL
]);
1602 pin_to_bits(lcd
.pins
.cl
, lcd_bits
[LCD_PORT_D
][LCD_BIT_CL
],
1603 lcd_bits
[LCD_PORT_C
][LCD_BIT_CL
]);
1604 pin_to_bits(lcd
.pins
.da
, lcd_bits
[LCD_PORT_D
][LCD_BIT_DA
],
1605 lcd_bits
[LCD_PORT_C
][LCD_BIT_DA
]);
1607 /* before this line, we must NOT send anything to the display.
1608 * Since lcd_init_display() needs to write data, we have to
1609 * enable mark the LCD initialized just before. */
1610 lcd
.initialized
= true;
1613 /* display a short message */
1614 #ifdef CONFIG_PANEL_CHANGE_MESSAGE
1615 #ifdef CONFIG_PANEL_BOOT_MESSAGE
1616 panel_lcd_print("\x1b[Lc\x1b[Lb\x1b[L*" CONFIG_PANEL_BOOT_MESSAGE
);
1619 panel_lcd_print("\x1b[Lc\x1b[Lb\x1b[L*Linux-" UTS_RELEASE
"\nPanel-"
1624 /* clear the display on the next device opening */
1625 lcd
.must_clear
= true;
1630 * These are the file operation function for user access to /dev/keypad
1633 static ssize_t
keypad_read(struct file
*file
,
1634 char __user
*buf
, size_t count
, loff_t
*ppos
)
1637 char __user
*tmp
= buf
;
1639 if (keypad_buflen
== 0) {
1640 if (file
->f_flags
& O_NONBLOCK
)
1643 if (wait_event_interruptible(keypad_read_wait
,
1644 keypad_buflen
!= 0))
1648 for (; count
-- > 0 && (keypad_buflen
> 0);
1649 ++i
, ++tmp
, --keypad_buflen
) {
1650 put_user(keypad_buffer
[keypad_start
], tmp
);
1651 keypad_start
= (keypad_start
+ 1) % KEYPAD_BUFFER
;
1658 static int keypad_open(struct inode
*inode
, struct file
*file
)
1660 if (!atomic_dec_and_test(&keypad_available
))
1661 return -EBUSY
; /* open only once at a time */
1663 if (file
->f_mode
& FMODE_WRITE
) /* device is read-only */
1666 keypad_buflen
= 0; /* flush the buffer on opening */
1670 static int keypad_release(struct inode
*inode
, struct file
*file
)
1672 atomic_inc(&keypad_available
);
1676 static const struct file_operations keypad_fops
= {
1677 .read
= keypad_read
, /* read */
1678 .open
= keypad_open
, /* open */
1679 .release
= keypad_release
, /* close */
1680 .llseek
= default_llseek
,
1683 static struct miscdevice keypad_dev
= {
1684 .minor
= KEYPAD_MINOR
,
1686 .fops
= &keypad_fops
,
1689 static void keypad_send_key(const char *string
, int max_len
)
1691 if (init_in_progress
)
1694 /* send the key to the device only if a process is attached to it. */
1695 if (!atomic_read(&keypad_available
)) {
1696 while (max_len
-- && keypad_buflen
< KEYPAD_BUFFER
&& *string
) {
1697 keypad_buffer
[(keypad_start
+ keypad_buflen
++) %
1698 KEYPAD_BUFFER
] = *string
++;
1700 wake_up_interruptible(&keypad_read_wait
);
1704 /* this function scans all the bits involving at least one logical signal,
1705 * and puts the results in the bitfield "phys_read" (one bit per established
1706 * contact), and sets "phys_read_prev" to "phys_read".
1708 * Note: to debounce input signals, we will only consider as switched a signal
1709 * which is stable across 2 measures. Signals which are different between two
1710 * reads will be kept as they previously were in their logical form (phys_prev).
1711 * A signal which has just switched will have a 1 in
1712 * (phys_read ^ phys_read_prev).
1714 static void phys_scan_contacts(void)
1721 phys_prev
= phys_curr
;
1722 phys_read_prev
= phys_read
;
1723 phys_read
= 0; /* flush all signals */
1725 /* keep track of old value, with all outputs disabled */
1726 oldval
= r_dtr(pprt
) | scan_mask_o
;
1727 /* activate all keyboard outputs (active low) */
1728 w_dtr(pprt
, oldval
& ~scan_mask_o
);
1730 /* will have a 1 for each bit set to gnd */
1731 bitmask
= PNL_PINPUT(r_str(pprt
)) & scan_mask_i
;
1732 /* disable all matrix signals */
1733 w_dtr(pprt
, oldval
);
1735 /* now that all outputs are cleared, the only active input bits are
1736 * directly connected to the ground
1739 /* 1 for each grounded input */
1740 gndmask
= PNL_PINPUT(r_str(pprt
)) & scan_mask_i
;
1742 /* grounded inputs are signals 40-44 */
1743 phys_read
|= (pmask_t
) gndmask
<< 40;
1745 if (bitmask
!= gndmask
) {
1746 /* since clearing the outputs changed some inputs, we know
1747 * that some input signals are currently tied to some outputs.
1748 * So we'll scan them.
1750 for (bit
= 0; bit
< 8; bit
++) {
1753 if (!(scan_mask_o
& bitval
)) /* skip unused bits */
1756 w_dtr(pprt
, oldval
& ~bitval
); /* enable this output */
1757 bitmask
= PNL_PINPUT(r_str(pprt
)) & ~gndmask
;
1758 phys_read
|= (pmask_t
) bitmask
<< (5 * bit
);
1760 w_dtr(pprt
, oldval
); /* disable all outputs */
1762 /* this is easy: use old bits when they are flapping,
1763 * use new ones when stable */
1764 phys_curr
= (phys_prev
& (phys_read
^ phys_read_prev
)) |
1765 (phys_read
& ~(phys_read
^ phys_read_prev
));
1768 static inline int input_state_high(struct logical_input
*input
)
1772 * this is an invalid test. It tries to catch
1773 * transitions from single-key to multiple-key, but
1774 * doesn't take into account the contacts polarity.
1775 * The only solution to the problem is to parse keys
1776 * from the most complex to the simplest combinations,
1777 * and mark them as 'caught' once a combination
1778 * matches, then unmatch it for all other ones.
1781 /* try to catch dangerous transitions cases :
1782 * someone adds a bit, so this signal was a false
1783 * positive resulting from a transition. We should
1784 * invalidate the signal immediately and not call the
1786 * eg: 0 -(press A)-> A -(press B)-> AB : don't match A's release.
1788 if (((phys_prev
& input
->mask
) == input
->value
) &&
1789 ((phys_curr
& input
->mask
) > input
->value
)) {
1790 input
->state
= INPUT_ST_LOW
; /* invalidate */
1795 if ((phys_curr
& input
->mask
) == input
->value
) {
1796 if ((input
->type
== INPUT_TYPE_STD
) &&
1797 (input
->high_timer
== 0)) {
1798 input
->high_timer
++;
1799 if (input
->u
.std
.press_fct
!= NULL
)
1800 input
->u
.std
.press_fct(input
->u
.std
.press_data
);
1801 } else if (input
->type
== INPUT_TYPE_KBD
) {
1802 /* will turn on the light */
1805 if (input
->high_timer
== 0) {
1806 char *press_str
= input
->u
.kbd
.press_str
;
1809 int s
= sizeof(input
->u
.kbd
.press_str
);
1811 keypad_send_key(press_str
, s
);
1815 if (input
->u
.kbd
.repeat_str
[0]) {
1816 char *repeat_str
= input
->u
.kbd
.repeat_str
;
1818 if (input
->high_timer
>= KEYPAD_REP_START
) {
1819 int s
= sizeof(input
->u
.kbd
.repeat_str
);
1821 input
->high_timer
-= KEYPAD_REP_DELAY
;
1822 keypad_send_key(repeat_str
, s
);
1824 /* we will need to come back here soon */
1828 if (input
->high_timer
< 255)
1829 input
->high_timer
++;
1834 /* else signal falling down. Let's fall through. */
1835 input
->state
= INPUT_ST_FALLING
;
1836 input
->fall_timer
= 0;
1841 static inline void input_state_falling(struct logical_input
*input
)
1844 /* FIXME !!! same comment as in input_state_high */
1845 if (((phys_prev
& input
->mask
) == input
->value
) &&
1846 ((phys_curr
& input
->mask
) > input
->value
)) {
1847 input
->state
= INPUT_ST_LOW
; /* invalidate */
1852 if ((phys_curr
& input
->mask
) == input
->value
) {
1853 if (input
->type
== INPUT_TYPE_KBD
) {
1854 /* will turn on the light */
1857 if (input
->u
.kbd
.repeat_str
[0]) {
1858 char *repeat_str
= input
->u
.kbd
.repeat_str
;
1860 if (input
->high_timer
>= KEYPAD_REP_START
) {
1861 int s
= sizeof(input
->u
.kbd
.repeat_str
);
1863 input
->high_timer
-= KEYPAD_REP_DELAY
;
1864 keypad_send_key(repeat_str
, s
);
1866 /* we will need to come back here soon */
1870 if (input
->high_timer
< 255)
1871 input
->high_timer
++;
1873 input
->state
= INPUT_ST_HIGH
;
1874 } else if (input
->fall_timer
>= input
->fall_time
) {
1875 /* call release event */
1876 if (input
->type
== INPUT_TYPE_STD
) {
1877 void (*release_fct
)(int) = input
->u
.std
.release_fct
;
1879 if (release_fct
!= NULL
)
1880 release_fct(input
->u
.std
.release_data
);
1881 } else if (input
->type
== INPUT_TYPE_KBD
) {
1882 char *release_str
= input
->u
.kbd
.release_str
;
1884 if (release_str
[0]) {
1885 int s
= sizeof(input
->u
.kbd
.release_str
);
1887 keypad_send_key(release_str
, s
);
1891 input
->state
= INPUT_ST_LOW
;
1893 input
->fall_timer
++;
1898 static void panel_process_inputs(void)
1900 struct list_head
*item
;
1901 struct logical_input
*input
;
1905 list_for_each(item
, &logical_inputs
) {
1906 input
= list_entry(item
, struct logical_input
, list
);
1908 switch (input
->state
) {
1910 if ((phys_curr
& input
->mask
) != input
->value
)
1912 /* if all needed ones were already set previously,
1913 * this means that this logical signal has been
1914 * activated by the releasing of another combined
1915 * signal, so we don't want to match.
1916 * eg: AB -(release B)-> A -(release A)-> 0 :
1919 if ((phys_prev
& input
->mask
) == input
->value
)
1921 input
->rise_timer
= 0;
1922 input
->state
= INPUT_ST_RISING
;
1923 /* no break here, fall through */
1924 case INPUT_ST_RISING
:
1925 if ((phys_curr
& input
->mask
) != input
->value
) {
1926 input
->state
= INPUT_ST_LOW
;
1929 if (input
->rise_timer
< input
->rise_time
) {
1931 input
->rise_timer
++;
1934 input
->high_timer
= 0;
1935 input
->state
= INPUT_ST_HIGH
;
1936 /* no break here, fall through */
1938 if (input_state_high(input
))
1940 /* no break here, fall through */
1941 case INPUT_ST_FALLING
:
1942 input_state_falling(input
);
1947 static void panel_scan_timer(void)
1949 if (keypad
.enabled
&& keypad_initialized
) {
1950 if (spin_trylock_irq(&pprt_lock
)) {
1951 phys_scan_contacts();
1953 /* no need for the parport anymore */
1954 spin_unlock_irq(&pprt_lock
);
1957 if (!inputs_stable
|| phys_curr
!= phys_prev
)
1958 panel_process_inputs();
1961 if (lcd
.enabled
&& lcd
.initialized
) {
1963 if (lcd
.light_tempo
== 0
1964 && ((lcd
.flags
& LCD_FLAG_L
) == 0))
1966 lcd
.light_tempo
= FLASH_LIGHT_TEMPO
;
1967 } else if (lcd
.light_tempo
> 0) {
1969 if (lcd
.light_tempo
== 0
1970 && ((lcd
.flags
& LCD_FLAG_L
) == 0))
1975 mod_timer(&scan_timer
, jiffies
+ INPUT_POLL_TIME
);
1978 static void init_scan_timer(void)
1980 if (scan_timer
.function
!= NULL
)
1981 return; /* already started */
1983 init_timer(&scan_timer
);
1984 scan_timer
.expires
= jiffies
+ INPUT_POLL_TIME
;
1985 scan_timer
.data
= 0;
1986 scan_timer
.function
= (void *)&panel_scan_timer
;
1987 add_timer(&scan_timer
);
1990 /* converts a name of the form "({BbAaPpSsEe}{01234567-})*" to a series of bits.
1991 * if <omask> or <imask> are non-null, they will be or'ed with the bits
1992 * corresponding to out and in bits respectively.
1993 * returns 1 if ok, 0 if error (in which case, nothing is written).
1995 static int input_name2mask(const char *name
, pmask_t
*mask
, pmask_t
*value
,
1996 char *imask
, char *omask
)
1998 static char sigtab
[10] = "EeSsPpAaBb";
2007 int in
, out
, bit
, neg
;
2009 for (in
= 0; (in
< sizeof(sigtab
)) && (sigtab
[in
] != *name
);
2013 if (in
>= sizeof(sigtab
))
2014 return 0; /* input name not found */
2015 neg
= (in
& 1); /* odd (lower) names are negated */
2020 if (isdigit(*name
)) {
2023 } else if (*name
== '-') {
2026 return 0; /* unknown bit name */
2029 bit
= (out
* 5) + in
;
2045 /* tries to bind a key to the signal name <name>. The key will send the
2046 * strings <press>, <repeat>, <release> for these respective events.
2047 * Returns the pointer to the new key if ok, NULL if the key could not be bound.
2049 static struct logical_input
*panel_bind_key(const char *name
, const char *press
,
2051 const char *release
)
2053 struct logical_input
*key
;
2055 key
= kzalloc(sizeof(*key
), GFP_KERNEL
);
2059 if (!input_name2mask(name
, &key
->mask
, &key
->value
, &scan_mask_i
,
2065 key
->type
= INPUT_TYPE_KBD
;
2066 key
->state
= INPUT_ST_LOW
;
2070 strncpy(key
->u
.kbd
.press_str
, press
, sizeof(key
->u
.kbd
.press_str
));
2071 strncpy(key
->u
.kbd
.repeat_str
, repeat
, sizeof(key
->u
.kbd
.repeat_str
));
2072 strncpy(key
->u
.kbd
.release_str
, release
,
2073 sizeof(key
->u
.kbd
.release_str
));
2074 list_add(&key
->list
, &logical_inputs
);
2079 /* tries to bind a callback function to the signal name <name>. The function
2080 * <press_fct> will be called with the <press_data> arg when the signal is
2081 * activated, and so on for <release_fct>/<release_data>
2082 * Returns the pointer to the new signal if ok, NULL if the signal could not
2085 static struct logical_input
*panel_bind_callback(char *name
,
2086 void (*press_fct
)(int),
2088 void (*release_fct
)(int),
2091 struct logical_input
*callback
;
2093 callback
= kmalloc(sizeof(*callback
), GFP_KERNEL
);
2097 memset(callback
, 0, sizeof(struct logical_input
));
2098 if (!input_name2mask(name
, &callback
->mask
, &callback
->value
,
2099 &scan_mask_i
, &scan_mask_o
))
2102 callback
->type
= INPUT_TYPE_STD
;
2103 callback
->state
= INPUT_ST_LOW
;
2104 callback
->rise_time
= 1;
2105 callback
->fall_time
= 1;
2106 callback
->u
.std
.press_fct
= press_fct
;
2107 callback
->u
.std
.press_data
= press_data
;
2108 callback
->u
.std
.release_fct
= release_fct
;
2109 callback
->u
.std
.release_data
= release_data
;
2110 list_add(&callback
->list
, &logical_inputs
);
2115 static void keypad_init(void)
2119 init_waitqueue_head(&keypad_read_wait
);
2120 keypad_buflen
= 0; /* flushes any eventual noisy keystroke */
2122 /* Let's create all known keys */
2124 for (keynum
= 0; keypad_profile
[keynum
][0][0]; keynum
++) {
2125 panel_bind_key(keypad_profile
[keynum
][0],
2126 keypad_profile
[keynum
][1],
2127 keypad_profile
[keynum
][2],
2128 keypad_profile
[keynum
][3]);
2132 keypad_initialized
= 1;
2135 /**************************************************/
2136 /* device initialization */
2137 /**************************************************/
2139 static int panel_notify_sys(struct notifier_block
*this, unsigned long code
,
2142 if (lcd
.enabled
&& lcd
.initialized
) {
2146 ("\x0cReloading\nSystem...\x1b[Lc\x1b[Lb\x1b[L+");
2150 ("\x0cSystem Halted.\x1b[Lc\x1b[Lb\x1b[L+");
2153 panel_lcd_print("\x0cPower off.\x1b[Lc\x1b[Lb\x1b[L+");
2162 static struct notifier_block panel_notifier
= {
2168 static void panel_attach(struct parport
*port
)
2170 if (port
->number
!= parport
)
2174 pr_err("%s: port->number=%d parport=%d, already registered!\n",
2175 __func__
, port
->number
, parport
);
2179 pprt
= parport_register_device(port
, "panel", NULL
, NULL
, /* pf, kf */
2181 /*PARPORT_DEV_EXCL */
2184 pr_err("%s: port->number=%d parport=%d, parport_register_device() failed\n",
2185 __func__
, port
->number
, parport
);
2189 if (parport_claim(pprt
)) {
2190 pr_err("could not claim access to parport%d. Aborting.\n",
2192 goto err_unreg_device
;
2195 /* must init LCD first, just in case an IRQ from the keypad is
2196 * generated at keypad init
2200 if (misc_register(&lcd_dev
))
2201 goto err_unreg_device
;
2204 if (keypad
.enabled
) {
2206 if (misc_register(&keypad_dev
))
2213 misc_deregister(&lcd_dev
);
2215 parport_unregister_device(pprt
);
2219 static void panel_detach(struct parport
*port
)
2221 if (port
->number
!= parport
)
2225 pr_err("%s: port->number=%d parport=%d, nothing to unregister.\n",
2226 __func__
, port
->number
, parport
);
2230 if (keypad
.enabled
&& keypad_initialized
) {
2231 misc_deregister(&keypad_dev
);
2232 keypad_initialized
= 0;
2235 if (lcd
.enabled
&& lcd
.initialized
) {
2236 misc_deregister(&lcd_dev
);
2237 lcd
.initialized
= false;
2240 parport_release(pprt
);
2241 parport_unregister_device(pprt
);
2245 static struct parport_driver panel_driver
= {
2247 .attach
= panel_attach
,
2248 .detach
= panel_detach
,
2252 static int __init
panel_init_module(void)
2254 int selected_keypad_type
= NOT_SET
;
2256 /* take care of an eventual profile */
2258 case PANEL_PROFILE_CUSTOM
:
2259 /* custom profile */
2260 selected_keypad_type
= DEFAULT_KEYPAD_TYPE
;
2261 selected_lcd_type
= DEFAULT_LCD_TYPE
;
2263 case PANEL_PROFILE_OLD
:
2264 /* 8 bits, 2*16, old keypad */
2265 selected_keypad_type
= KEYPAD_TYPE_OLD
;
2266 selected_lcd_type
= LCD_TYPE_OLD
;
2268 /* TODO: This two are a little hacky, sort it out later */
2269 if (lcd_width
== NOT_SET
)
2271 if (lcd_hwidth
== NOT_SET
)
2274 case PANEL_PROFILE_NEW
:
2275 /* serial, 2*16, new keypad */
2276 selected_keypad_type
= KEYPAD_TYPE_NEW
;
2277 selected_lcd_type
= LCD_TYPE_KS0074
;
2279 case PANEL_PROFILE_HANTRONIX
:
2280 /* 8 bits, 2*16 hantronix-like, no keypad */
2281 selected_keypad_type
= KEYPAD_TYPE_NONE
;
2282 selected_lcd_type
= LCD_TYPE_HANTRONIX
;
2284 case PANEL_PROFILE_NEXCOM
:
2285 /* generic 8 bits, 2*16, nexcom keypad, eg. Nexcom. */
2286 selected_keypad_type
= KEYPAD_TYPE_NEXCOM
;
2287 selected_lcd_type
= LCD_TYPE_NEXCOM
;
2289 case PANEL_PROFILE_LARGE
:
2290 /* 8 bits, 2*40, old keypad */
2291 selected_keypad_type
= KEYPAD_TYPE_OLD
;
2292 selected_lcd_type
= LCD_TYPE_OLD
;
2297 * Init lcd struct with load-time values to preserve exact current
2298 * functionality (at least for now).
2300 lcd
.height
= lcd_height
;
2301 lcd
.width
= lcd_width
;
2302 lcd
.bwidth
= lcd_bwidth
;
2303 lcd
.hwidth
= lcd_hwidth
;
2304 lcd
.charset
= lcd_charset
;
2305 lcd
.proto
= lcd_proto
;
2306 lcd
.pins
.e
= lcd_e_pin
;
2307 lcd
.pins
.rs
= lcd_rs_pin
;
2308 lcd
.pins
.rw
= lcd_rw_pin
;
2309 lcd
.pins
.cl
= lcd_cl_pin
;
2310 lcd
.pins
.da
= lcd_da_pin
;
2311 lcd
.pins
.bl
= lcd_bl_pin
;
2313 /* Leave it for now, just in case */
2314 lcd
.esc_seq
.len
= -1;
2317 * Overwrite selection with module param values (both keypad and lcd),
2318 * where the deprecated params have lower prio.
2320 if (keypad_enabled
!= NOT_SET
)
2321 selected_keypad_type
= keypad_enabled
;
2322 if (keypad_type
!= NOT_SET
)
2323 selected_keypad_type
= keypad_type
;
2325 keypad
.enabled
= (selected_keypad_type
> 0);
2327 if (lcd_enabled
!= NOT_SET
)
2328 selected_lcd_type
= lcd_enabled
;
2329 if (lcd_type
!= NOT_SET
)
2330 selected_lcd_type
= lcd_type
;
2332 lcd
.enabled
= (selected_lcd_type
> 0);
2334 switch (selected_keypad_type
) {
2335 case KEYPAD_TYPE_OLD
:
2336 keypad_profile
= old_keypad_profile
;
2338 case KEYPAD_TYPE_NEW
:
2339 keypad_profile
= new_keypad_profile
;
2341 case KEYPAD_TYPE_NEXCOM
:
2342 keypad_profile
= nexcom_keypad_profile
;
2345 keypad_profile
= NULL
;
2349 /* tells various subsystems about the fact that we are initializing */
2350 init_in_progress
= 1;
2352 if (parport_register_driver(&panel_driver
)) {
2353 pr_err("could not register with parport. Aborting.\n");
2357 if (!lcd
.enabled
&& !keypad
.enabled
) {
2358 /* no device enabled, let's release the parport */
2360 parport_release(pprt
);
2361 parport_unregister_device(pprt
);
2364 parport_unregister_driver(&panel_driver
);
2365 pr_err("driver version " PANEL_VERSION
" disabled.\n");
2369 register_reboot_notifier(&panel_notifier
);
2372 pr_info("driver version " PANEL_VERSION
2373 " registered on parport%d (io=0x%lx).\n", parport
,
2376 pr_info("driver version " PANEL_VERSION
2377 " not yet registered\n");
2378 /* tells various subsystems about the fact that initialization
2380 init_in_progress
= 0;
2384 static void __exit
panel_cleanup_module(void)
2386 unregister_reboot_notifier(&panel_notifier
);
2388 if (scan_timer
.function
!= NULL
)
2389 del_timer_sync(&scan_timer
);
2392 if (keypad
.enabled
) {
2393 misc_deregister(&keypad_dev
);
2394 keypad_initialized
= 0;
2398 panel_lcd_print("\x0cLCD driver " PANEL_VERSION
2399 "\nunloaded.\x1b[Lc\x1b[Lb\x1b[L-");
2400 misc_deregister(&lcd_dev
);
2401 lcd
.initialized
= false;
2404 /* TODO: free all input signals */
2405 parport_release(pprt
);
2406 parport_unregister_device(pprt
);
2409 parport_unregister_driver(&panel_driver
);
2412 module_init(panel_init_module
);
2413 module_exit(panel_cleanup_module
);
2414 MODULE_AUTHOR("Willy Tarreau");
2415 MODULE_LICENSE("GPL");