aboutsummaryrefslogtreecommitdiffstats
path: root/drv_RouterBoard.c
blob: 5ad5b1e0b6eeb6995edce6f25df626c8e55849e2 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
/* $Id$
 * $URL$
 *
 * driver for the "Router Board LCD port" 
 * see port details at http://www.routerboard.com
 *
 * Copyright (C) 2004  Roman Jozsef <rjoco77@freemail.hu> 
 * Copyright (C) 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
 *
 * based on the HD44780 parallel port driver and RB SDK example 
 *
 * This file is part of LCD4Linux.
 *
 * LCD4Linux is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * LCD4Linux is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */


/* This particulary board not have paralell port but have a special LCD header
 * where can connect an HD44780 display.
 * This port called IOSC0 port, and is write only, this port control the
 * 4 leds on board too.
 * Because its a write only port you can't control leds outside lcd driver
 * or inverse, for this added the socket controlled leds. To send led status
 * simply open an UDP socket and send to localhost 127.0.0.1 port 3333 one
 * byte or more anyway only the first byte 4 low bits used the others is
 * cleared and ignored bit0 = Led1 ,bit1 = Led2 ...
 * This socket polled via timer callback, for detail see at drv_RB_start()
 * I add at to end of this file an example!
 * If you don't want coment #define RB_WITH LEDS and this part will be ignored
 *
 * The connection details:
 *    The IOCS0 port lower 16 bits connected as follows:
 *     bit   LCD	LEDS
 *     0..7  data
 *      8    INITX
 *      9    SLINX
 *      10   AFDX
 *      11   backlit
 *      12   		LED1
 *      13   		LED2
 *      14   		LED3
 *      15   		LED4
 *    
 * LCD male header:
 * 1	Vcc +5V
 * 2	GND
 * 3	RS (Register Select,AFDX)
 * 4	Contrast adjust (controlled) but how? if you know tell me not mentioned on User Manual
 * 5	E (enable signal, INITX)
 * 6	R/W (Data read/write or SLINX) not used connect LCD pin to ground
 * 7	Data 1
 * 8	Data 0
 * 9	Data 3
 * 10	Data 2
 * 11	Data 5
 * 12	Data 4
 * 13	Data 7
 * 14	Data 6
 * 15	Backlit GND (controlled) (IOSC0 bit 11)
 * 16   Backlit Vcc +5V
 *
 * If you using this driver and board and you have any fun device connected,
 * program or story :-) ,please share for me. Thanks.
 *    	   
 * Literature
 *    [GEODE] Geode SC1100 Information Appliance On a Chip
 *      (http://www.national.com/ds/SC/SC1100.pdf)	   
 *    [RB User Manual]
 *      (http://www.routerboard.com)
 *
 *
 * Revision 1.2 
 * Added backlight control
 */


/* 
 *
 * exported fuctions:
 *
 * struct DRIVER drv_RouterBoard
 *
 */





#include "config.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <sys/io.h>

#include "debug.h"
#include "cfg.h"
#include "udelay.h"
#include "qprintf.h"
#include "plugin.h"
#include "widget.h"
#include "widget_text.h"
#include "widget_icon.h"
#include "widget_bar.h"
#include "drv.h"
#include "drv_generic_text.h"
#include "drv_generic_gpio.h"


/* #define RB_WITH_LEDS 1 */

#ifdef RB_WITH_LEDS		/* Build without socket&led support */

#include <arpa/inet.h>
#include <sys/socket.h>
#include <sys/poll.h>

#define POLL_TIMEOUT	10	/* Socket poll timeout */
#define MAXMSG_SIZE	100	/* Max messagge we can receive */

static int sock_c;		/* Socket handler */
static struct sockaddr_in *sacl;
char sock_msg[MAXMSG_SIZE];

#endif


static char Name[] = "RouterBoard";

static int Model;
static int Capabilities;

/* RouterBoard control signals */

#define LCD_INITX     0x0100
#define LCD_SLINX     0x0200
#define LCD_AFDX      0x0400
#define LCD_BACKLIGHT 0x0800
#define RB_LEDS	      0xF000

#define CAR 0x0CF8
#define CDR 0x0CFC


/* HD44780 execution timings [microseconds]
 * as these values differ from spec to spec,
 * we use the worst-case values.
 */

#define T_INIT1 4100		/* first init sequence:  4.1 msec */
#define T_INIT2  100		/* second init sequence: 100 usec */
#define T_EXEC    80		/* normal execution time */
#define T_WRCG   120		/* CG RAM Write */
#define T_CLEAR 1680		/* Clear Display */
#define T_AS      60		/* Address setup time */


/* buffer holding the GPO state */
static unsigned char GPO = 0;

/* buffor holding backlight and LED states */
static unsigned int RB_Leds = 0;

typedef struct {
    int type;
    char *name;
    int capabilities;
} MODEL;

#define CAP_HD66712    (1<<0)

static MODEL Models[] = {
    {0x01, "HD44780", 0},
    {0x02, "HD66712", CAP_HD66712},
    {0xff, "Unknown", 0}
};


/****************************************/
/***  hardware dependant functions    ***/
/****************************************/

#ifdef RB_WITH_LEDS

static int drv_RB_sock_init()
{

    if ((sacl = (struct sockaddr_in *) malloc(sizeof(struct sockaddr_in))) == NULL) {
	return -1;
    }

    memset(sacl, 0, sizeof(struct sockaddr_in));
    sacl->sin_family = AF_INET;
    sacl->sin_port = htons(3333);	//Listen Port
    sacl->sin_addr.s_addr = inet_addr("127.0.0.1");	//Listen Address

    if ((sock_c = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
	error("Socket open failed");
	free(sacl);
	return -1;
    }

    if (bind(sock_c, (struct sockaddr *) sacl, sizeof(struct sockaddr_in)) < 0) {
	error("Socket bind open failed");
	free(sacl);
	return -1;
    }
    return 0;
}


static void drv_RB_poll_data(void __attribute__ ((unused)) * notused)
{
    int len, size;
    struct pollfd usfd;
    usfd.fd = sock_c;
    usfd.events = POLLIN | POLLPRI;
    while (poll(&usfd, 1, POLL_TIMEOUT) > 0) {
	len = sizeof(struct sockaddr_in);
	if ((size = recvfrom(sock_c, sock_msg, MAXMSG_SIZE, 0, (struct sockaddr *) sacl, (socklen_t *) & len)) < 0);
	else {
	    RB_Leds &= 0x0fff;
	    RB_Leds |= (sock_msg[0] & 0x0F) << 12;
	    /* fprintf(stderr, "Received data %s\n",sock_msg); */
	}
    }
}

#endif


static void drv_RB_outw(const unsigned int data)
{
    static unsigned int port = 0;

    /* IOCS0 port number can read from PCI Configuration Space Function 0 (F0) */
    /* at index 74h as 16 bit value (see [GEODE] 5.3.1 pg.151 and pg.176 Table 5-29 */
    if (port == 0) {
	/* get IO permission, here you can't use ioperm command */
	iopl(3);
	outl(0x80009074, CAR);
	port = inw(CDR);
    }

    outw(data | RB_Leds, port);
}


static int drv_RB_backlight(int backlight)
{
    /* -1 is used to query  the current Backlight */
    if (backlight == -1) {
	return (RB_Leds & LCD_BACKLIGHT) ? 1 : 0;
    }

    if (backlight > 0) {
	/* set bit */
	RB_Leds |= LCD_BACKLIGHT;
	backlight = 1;
    } else {
	backlight = 0;
	/* clear bit */
	RB_Leds &= ~LCD_BACKLIGHT;
    }

    /* Set backlight output */
    drv_RB_outw(0);

    return backlight;
}




static void drv_RB_command(const unsigned char cmd, const int delay)
{

    drv_RB_outw(LCD_INITX | cmd);
    ndelay(T_AS);
    drv_RB_outw(cmd);

    // wait for command completion
    udelay(delay);

}


static void drv_RB_data(const char *string, const int len, const int delay)
{
    int l = len;
    unsigned char ch;

    /* sanity check */
    if (len <= 0)
	return;

    while (l--) {

	ch = *(string++);

	drv_RB_outw(ch | LCD_AFDX | LCD_INITX);
	ndelay(T_AS);
	drv_RB_outw(ch | LCD_AFDX);

	// wait for command completion
	udelay(delay);

    }
}


static void drv_RB_clear(void)
{
    drv_RB_command(0x01, T_CLEAR);
}


static void drv_RB_goto(int row, int col)
{
    int pos;

    /* 16x1 Displays are organized as 8x2 :-( */
    if (DCOLS == 16 && DROWS == 1 && col > 7) {
	row++;
	col -= 8;
    }

    if (Capabilities & CAP_HD66712) {
	/* the HD66712 doesn't have a braindamadged RAM layout */
	pos = row * 32 + col;
    } else {
	/* 16x4 Displays use a slightly different layout */
	if (DCOLS == 16 && DROWS == 4) {
	    pos = (row % 2) * 64 + (row / 2) * 16 + col;
	} else {
	    pos = (row % 2) * 64 + (row / 2) * 20 + col;
	}
    }
    drv_RB_command((0x80 | pos), T_EXEC);
}


static void drv_RB_write(const int row, const int col, const char *data, const int len)
{
    drv_RB_goto(row, col);
    drv_RB_data(data, len, T_EXEC);
}


static void drv_RB_defchar(const int ascii, const unsigned char *matrix)
{
    int i;
    char buffer[8];

    for (i = 0; i < 8; i++) {
	buffer[i] = matrix[i] & 0x1f;
    }

    drv_RB_command(0x40 | 8 * ascii, T_EXEC);
    drv_RB_data(buffer, 8, T_WRCG);
}


static int drv_RB_GPO(const int num, const int val)
{
    int v;

    if (val > 0) {
	/* set bit */
	v = 1;
	GPO |= 1 << num;
    } else {
	/* clear bit */
	v = 0;
	GPO &= ~(1 << num);
    }

    RB_Leds &= 0x0fff;
    RB_Leds |= GPO << 12;

    drv_RB_outw(0);

    return v;
}


static int drv_RB_start(const char *section, const int quiet)
{
    char *model, *strsize;
    int rows = -1, cols = -1, gpos = -1;
    int l;

    model = cfg_get(section, "Model", "HD44780");
    if (model != NULL && *model != '\0') {
	int i;
	for (i = 0; Models[i].type != 0xff; i++) {
	    if (strcasecmp(Models[i].name, model) == 0)
		break;
	}
	if (Models[i].type == 0xff) {
	    error("%s: %s.Model '%s' is unknown from %s", Name, section, model, cfg_source());
	    return -1;
	}
	Model = i;
	Capabilities = Models[Model].capabilities;
	info("%s: using model '%s'", Name, Models[Model].name);
    } else {
	error("%s: empty '%s.Model' entry from %s", Name, section, cfg_source());
	return -1;
    }
    free(model);

    strsize = cfg_get(section, "Size", NULL);
    if (strsize == NULL || *strsize == '\0') {
	error("%s: no '%s.Size' entry from %s", Name, section, cfg_source());
	free(strsize);
	return -1;
    }
    if (sscanf(strsize, "%dx%d", &cols, &rows) != 2 || rows < 1 || cols < 1) {
	error("%s: bad %s.Size '%s' from %s", Name, section, strsize, cfg_source());
	free(strsize);
	return -1;
    }
    free(strsize);

    /*set backlight */
    if (cfg_number(section, "Backlight", 1, 0, 1, &l) > 0) {
	drv_RB_backlight(l);
    }

    if (cfg_number(section, "GPOs", 0, 0, 4, &gpos) < 0)
	return -1;
    GPOS = gpos;
    if (GPOS > 0) {
	info("%s: using %d GPO's", Name, GPOS);
    }
#ifdef RB_WITH_LEDS

    if (drv_RB_sock_init() < 0) {
	error("Sock error");
	return -1;
    } else
	timer_add(drv_RB_poll_data, NULL, 500, 0);

#endif

    DROWS = rows;
    DCOLS = cols;

    drv_RB_command(0x30, T_INIT1);	/* 8 Bit mode, wait 4.1 ms */
    drv_RB_command(0x30, T_INIT2);	/* 8 Bit mode, wait 100 us */
    drv_RB_command(0x38, T_EXEC);	/* 8 Bit mode, 1/16 duty cycle, 5x8 font */

    drv_RB_command(0x08, T_EXEC);	/* Display off, cursor off, blink off */
    drv_RB_command(0x0c, T_CLEAR);	/* Display on, cursor off, blink off, wait 1.64 ms */
    drv_RB_command(0x06, T_EXEC);	/* curser moves to right, no shift */

    if ((Capabilities & CAP_HD66712) && DROWS > 2) {
	drv_RB_command(0x3c, T_EXEC);	/* set extended register enable bit */
	drv_RB_command(0x09, T_EXEC);	/* set 4-line mode */
	drv_RB_command(0x38, T_EXEC);	/* clear extended register enable bit */
    }

    drv_RB_clear();
    drv_RB_command(0x03, T_CLEAR);	/* return home */

    if (!quiet) {
	char buffer[40];
	qprintf(buffer, sizeof(buffer), "%s %dx%d", Name, DCOLS, DROWS);
	if (drv_generic_text_greet(buffer, NULL)) {
	    sleep(3);
	    drv_RB_clear();
	}
    }

    return 0;
}


/****************************************/
/***            plugins               ***/
/****************************************/
static void plugin_backlight(RESULT * result, const int argc, RESULT * argv[])
{
    double backlight;

    switch (argc) {
    case 0:
	backlight = drv_RB_backlight(-1);
	SetResult(&result, R_NUMBER, &backlight);
	break;
    case 1:
	backlight = drv_RB_backlight(R2N(argv[0]));
	SetResult(&result, R_NUMBER, &backlight);
	break;
    default:
	error("%s::backlight(): wrong number of parameters", Name);
	SetResult(&result, R_STRING, "");
    }
}



/****************************************/
/***        widget callbacks          ***/
/****************************************/


/* using drv_generic_text_draw(W) */
/* using drv_generic_text_icon_draw(W) */
/* using drv_generic_text_bar_draw(W) */
/* using drv_generic_gpio_draw(W) */


/****************************************/
/***        exported functions        ***/
/****************************************/


/* list models */
int drv_RB_list(void)
{
    int i;

    for (i = 0; Models[i].type != 0xff; i++) {
	printf("%s ", Models[i].name);
    }
    return 0;
}

/* initialize driver & display */
int drv_RB_init(const char *section, const int quiet)
{
    WIDGET_CLASS wc;
    int asc255bug;
    int ret;

    info("%s: %s", Name, "$Rev$");

    /* display preferences */
    XRES = 5;			/* pixel width of one char  */
    YRES = 8;			/* pixel height of one char  */
    CHARS = 8;			/* number of user-defineable characters */
    CHAR0 = 0;			/* ASCII of first user-defineable char */
    GOTO_COST = 2;		/* number of bytes a goto command requires */

    /* real worker functions */
    drv_generic_text_real_write = drv_RB_write;
    drv_generic_text_real_defchar = drv_RB_defchar;
    drv_generic_gpio_real_set = drv_RB_GPO;


    /* start display */
    if ((ret = drv_RB_start(section, quiet)) != 0)
	return ret;

    /* initialize generic text driver */
    if ((ret = drv_generic_text_init(section, Name)) != 0)
	return ret;

    /* initialize generic icon driver */
    if ((ret = drv_generic_text_icon_init()) != 0)
	return ret;

    /* initialize generic bar driver */
    if ((ret = drv_generic_text_bar_init(0)) != 0)
	return ret;

    /* add fixed chars to the bar driver */
    /* most displays have a full block on ascii 255, but some have kind of  */
    /* an 'inverted P'. If you specify 'asc255bug 1 in the config, this */
    /* char will not be used, but rendered by the bar driver */
    cfg_number(section, "asc255bug", 0, 0, 1, &asc255bug);
    drv_generic_text_bar_add_segment(0, 0, 255, 32);	/* ASCII  32 = blank */
    if (!asc255bug)
	drv_generic_text_bar_add_segment(255, 255, 255, 255);	/* ASCII 255 = block */

    /* initialize generic GPIO driver */
    if ((ret = drv_generic_gpio_init(section, Name)) != 0)
	return ret;

    /* register text widget */
    wc = Widget_Text;
    wc.draw = drv_generic_text_draw;
    widget_register(&wc);

    /* register icon widget */
    wc = Widget_Icon;
    wc.draw = drv_generic_text_icon_draw;
    widget_register(&wc);

    /* register bar widget */
    wc = Widget_Bar;
    wc.draw = drv_generic_text_bar_draw;
    widget_register(&wc);

    /* register plugins */
    AddFunction("LCD::backlight", -1, plugin_backlight);

    return 0;
}


/* close driver & display */
int drv_RB_quit(const int quiet)
{

    info("%s: shutting down.", Name);

    drv_generic_text_quit();
    drv_generic_gpio_quit();

    /* clear *both* displays */
    drv_RB_clear();

    /* say goodbye... */
    if (!quiet) {
	drv_generic_text_greet("goodbye!", NULL);
    }
#ifdef RB_WITH_LEDS
    close(sock_c);
    free(sacl);			/*close network socket */
#endif

    return (0);
}


DRIVER drv_RouterBoard = {
  name:Name,
  list:drv_RB_list,
  init:drv_RB_init,
  quit:drv_RB_quit,
};



/* 

Simple example to send led status to port 3333
#include <stdio.h>
#include <arpa/inet.h>
#include <errno.h>

int send_packet (unsigned char leds)
{
    struct sockaddr_in *sas;
    int sock;
    char msg[20];
    msg[0]=leds;
    msg[1]=0;
    
    if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) {
	fprintf(stderr, "Socket option failed.\n");
	return -1;
    }
    
    if (( sas = (struct sockaddr_in *) malloc(sizeof(struct sockaddr_in))) == NULL) 
            return -1 ;
    memset( sas, 0, sizeof(struct sockaddr_in));
    sas->sin_family = AF_INET;
    sas->sin_port = htons(3333);
    sas->sin_addr.s_addr = inet_addr("127.0.0.1");
    if(sendto(sock,msg,6, 0, (struct sockaddr *) sas, sizeof(struct sockaddr_in)) > 0) 
      { free(sas);
	return 1;
       }  //sent ok to dest

    free(sas);
    return -1;	//Send failed
}
  
int main ()
{
 send_packet(0x03);
 return 0;
} 

*/