summaryrefslogtreecommitdiff
path: root/drivers/media/dvb/bt8xx/bt878.c
blob: 3c5a8e273c4aa47488837a3110deab42f33099b2 (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
/*
 * bt878.c: part of the driver for the Pinnacle PCTV Sat DVB PCI card
 *
 * Copyright (C) 2002 Peter Hettkamp <peter.hettkamp@t-online.de>
 *
 * large parts based on the bttv driver
 * Copyright (C) 1996,97,98 Ralph  Metzler (rjkm@metzlerbros.de)
 *                        & Marcus Metzler (mocm@metzlerbros.de)
 * (c) 1999,2000 Gerd Knorr <kraxel@goldbach.in-berlin.de>
 *
 * This program 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
 * of the License, or (at your option) any later version.
 *

 * This program 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 * Or, point your browser to http://www.gnu.org/copyleft/gpl.html
 *
 */

#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <asm/io.h>
#include <linux/ioport.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <linux/types.h>
#include <linux/interrupt.h>
#include <linux/kmod.h>
#include <linux/vmalloc.h>
#include <linux/init.h>

#include "dmxdev.h"
#include "dvbdev.h"
#include "bt878.h"
#include "dst_priv.h"


/**************************************/
/* Miscellaneous utility  definitions */
/**************************************/

static unsigned int bt878_verbose = 1;
static unsigned int bt878_debug;

module_param_named(verbose, bt878_verbose, int, 0444);
MODULE_PARM_DESC(verbose,
		 "verbose startup messages, default is 1 (yes)");
module_param_named(debug, bt878_debug, int, 0644);
MODULE_PARM_DESC(debug, "Turn on/off debugging, default is 0 (off).");

int bt878_num;
struct bt878 bt878[BT878_MAX];

EXPORT_SYMBOL(bt878_debug);
EXPORT_SYMBOL(bt878_verbose);
EXPORT_SYMBOL(bt878_num);
EXPORT_SYMBOL(bt878);

#define btwrite(dat,adr)    bmtwrite((dat), (bt->bt878_mem+(adr)))
#define btread(adr)         bmtread(bt->bt878_mem+(adr))

#define btand(dat,adr)      btwrite((dat) & btread(adr), adr)
#define btor(dat,adr)       btwrite((dat) | btread(adr), adr)
#define btaor(dat,mask,adr) btwrite((dat) | ((mask) & btread(adr)), adr)

#if defined(dprintk)
#undef dprintk
#endif
#define dprintk if(bt878_debug) printk

static void bt878_mem_free(struct bt878 *bt)
{
	if (bt->buf_cpu) {
		pci_free_consistent(bt->dev, bt->buf_size, bt->buf_cpu,
				    bt->buf_dma);
		bt->buf_cpu = NULL;
	}

	if (bt->risc_cpu) {
		pci_free_consistent(bt->dev, bt->risc_size, bt->risc_cpu,
				    bt->risc_dma);
		bt->risc_cpu = NULL;
	}
}

static int bt878_mem_alloc(struct bt878 *bt)
{
	if (!bt->buf_cpu) {
		bt->buf_size = 128 * 1024;

		bt->buf_cpu =
		    pci_alloc_consistent(bt->dev, bt->buf_size,
					 &bt->buf_dma);

		if (!bt->buf_cpu)
			return -ENOMEM;

		memset(bt->buf_cpu, 0, bt->buf_size);
	}

	if (!bt->risc_cpu) {
		bt->risc_size = PAGE_SIZE;
		bt->risc_cpu =
		    pci_alloc_consistent(bt->dev, bt->risc_size,
					 &bt->risc_dma);

		if (!bt->risc_cpu) {
			bt878_mem_free(bt);
			return -ENOMEM;
		}

		memset(bt->risc_cpu, 0, bt->risc_size);
	}

	return 0;
}

/* RISC instructions */
#define RISC_WRITE		(0x01 << 28)
#define RISC_JUMP		(0x07 << 28)
#define RISC_SYNC		(0x08 << 28)

/* RISC bits */
#define RISC_WR_SOL		(1 << 27)
#define RISC_WR_EOL		(1 << 26)
#define RISC_IRQ		(1 << 24)
#define RISC_STATUS(status)	((((~status) & 0x0F) << 20) | ((status & 0x0F) << 16))
#define RISC_SYNC_RESYNC	(1 << 15)
#define RISC_SYNC_FM1		0x06
#define RISC_SYNC_VRO		0x0C

#define RISC_FLUSH()		bt->risc_pos = 0
#define RISC_INSTR(instr)	bt->risc_cpu[bt->risc_pos++] = cpu_to_le32(instr)

static int bt878_make_risc(struct bt878 *bt)
{
	bt->block_bytes = bt->buf_size >> 4;
	bt->block_count = 1 << 4;
	bt->line_bytes = bt->block_bytes;
	bt->line_count = bt->block_count;

	while (bt->line_bytes > 4095) {
		bt->line_bytes >>= 1;
		bt->line_count <<= 1;
	}

	if (bt->line_count > 255) {
		printk("bt878: buffer size error!\n");
		return -EINVAL;
	}
	return 0;
}


static void bt878_risc_program(struct bt878 *bt, u32 op_sync_orin)
{
	u32 buf_pos = 0;
	u32 line;

	RISC_FLUSH();
	RISC_INSTR(RISC_SYNC | RISC_SYNC_FM1 | op_sync_orin);
	RISC_INSTR(0);

	dprintk("bt878: risc len lines %u, bytes per line %u\n",
			bt->line_count, bt->line_bytes);
	for (line = 0; line < bt->line_count; line++) {
		// At the beginning of every block we issue an IRQ with previous (finished) block number set
		if (!(buf_pos % bt->block_bytes))
			RISC_INSTR(RISC_WRITE | RISC_WR_SOL | RISC_WR_EOL |
				   RISC_IRQ |
				   RISC_STATUS(((buf_pos /
						 bt->block_bytes) +
						(bt->block_count -
						 1)) %
					       bt->block_count) | bt->
				   line_bytes);
		else
			RISC_INSTR(RISC_WRITE | RISC_WR_SOL | RISC_WR_EOL |
				   bt->line_bytes);
		RISC_INSTR(bt->buf_dma + buf_pos);
		buf_pos += bt->line_bytes;
	}

	RISC_INSTR(RISC_SYNC | op_sync_orin | RISC_SYNC_VRO);
	RISC_INSTR(0);

	RISC_INSTR(RISC_JUMP);
	RISC_INSTR(bt->risc_dma);

	btwrite((bt->line_count << 16) | bt->line_bytes, BT878_APACK_LEN);
}

/*****************************/
/* Start/Stop grabbing funcs */
/*****************************/

void bt878_start(struct bt878 *bt, u32 controlreg, u32 op_sync_orin,
		u32 irq_err_ignore)
{
	u32 int_mask;

	dprintk("bt878 debug: bt878_start (ctl=%8.8x)\n", controlreg);
	/* complete the writing of the risc dma program now we have
	 * the card specifics
	 */
	bt878_risc_program(bt, op_sync_orin);
	controlreg &= ~0x1f;
	controlreg |= 0x1b;

	btwrite(cpu_to_le32(bt->risc_dma), BT878_ARISC_START);

	/* original int mask had :
	 *    6    2    8    4    0
	 * 1111 1111 1000 0000 0000
	 * SCERR|OCERR|PABORT|RIPERR|FDSR|FTRGT|FBUS|RISCI
	 * Hacked for DST to:
	 * SCERR | OCERR | FDSR | FTRGT | FBUS | RISCI
	 */
	int_mask = BT878_ASCERR | BT878_AOCERR | BT878_APABORT |
		BT878_ARIPERR | BT878_APPERR | BT878_AFDSR | BT878_AFTRGT |
		BT878_AFBUS | BT878_ARISCI;


	/* ignore pesky bits */
	int_mask &= ~irq_err_ignore;

	btwrite(int_mask, BT878_AINT_MASK);
	btwrite(controlreg, BT878_AGPIO_DMA_CTL);
}

void bt878_stop(struct bt878 *bt)
{
	u32 stat;
	int i = 0;

	dprintk("bt878 debug: bt878_stop\n");

	btwrite(0, BT878_AINT_MASK);
	btand(~0x13, BT878_AGPIO_DMA_CTL);

	do {
		stat = btread(BT878_AINT_STAT);
		if (!(stat & BT878_ARISC_EN))
			break;
		i++;
	} while (i < 500);

	dprintk("bt878(%d) debug: bt878_stop, i=%d, stat=0x%8.8x\n",
		bt->nr, i, stat);
}

EXPORT_SYMBOL(bt878_start);
EXPORT_SYMBOL(bt878_stop);

/*****************************/
/* Interrupt service routine */
/*****************************/

static irqreturn_t bt878_irq(int irq, void *dev_id, struct pt_regs *regs)
{
	u32 stat, astat, mask;
	int count;
	struct bt878 *bt;

	bt = (struct bt878 *) dev_id;

	count = 0;
	while (1) {
		stat = btread(BT878_AINT_STAT);
		mask = btread(BT878_AINT_MASK);
		if (!(astat = (stat & mask)))
			return IRQ_NONE;	/* this interrupt is not for me */
/*		dprintk("bt878(%d) debug: irq count %d, stat 0x%8.8x, mask 0x%8.8x\n",bt->nr,count,stat,mask); */
		btwrite(astat, BT878_AINT_STAT);	/* try to clear interupt condition */


		if (astat & (BT878_ASCERR | BT878_AOCERR)) {
			if (bt878_verbose) {
				printk("bt878(%d): irq%s%s risc_pc=%08x\n",
				       bt->nr,
				       (astat & BT878_ASCERR) ? " SCERR" :
				       "",
				       (astat & BT878_AOCERR) ? " OCERR" :
				       "", btread(BT878_ARISC_PC));
			}
		}
		if (astat & (BT878_APABORT | BT878_ARIPERR | BT878_APPERR)) {
			if (bt878_verbose) {
				printk
				    ("bt878(%d): irq%s%s%s risc_pc=%08x\n",
				     bt->nr,
				     (astat & BT878_APABORT) ? " PABORT" :
				     "",
				     (astat & BT878_ARIPERR) ? " RIPERR" :
				     "",
				     (astat & BT878_APPERR) ? " PPERR" :
				     "", btread(BT878_ARISC_PC));
			}
		}
		if (astat & (BT878_AFDSR | BT878_AFTRGT | BT878_AFBUS)) {
			if (bt878_verbose) {
				printk
				    ("bt878(%d): irq%s%s%s risc_pc=%08x\n",
				     bt->nr,
				     (astat & BT878_AFDSR) ? " FDSR" : "",
				     (astat & BT878_AFTRGT) ? " FTRGT" :
				     "",
				     (astat & BT878_AFBUS) ? " FBUS" : "",
				     btread(BT878_ARISC_PC));
			}
		}
		if (astat & BT878_ARISCI) {
			bt->finished_block = (stat & BT878_ARISCS) >> 28;
			tasklet_schedule(&bt->tasklet);
			break;
		}
		count++;
		if (count > 20) {
			btwrite(0, BT878_AINT_MASK);
			printk(KERN_ERR
			       "bt878(%d): IRQ lockup, cleared int mask\n",
			       bt->nr);
			break;
		}
	}
	return IRQ_HANDLED;
}

int
bt878_device_control(struct bt878 *bt, unsigned int cmd, union dst_gpio_packet *mp)
{
	int retval;

	retval = 0;
	if (down_interruptible (&bt->gpio_lock))
		return -ERESTARTSYS;
	/* special gpio signal */
	switch (cmd) {
	    case DST_IG_ENABLE:
		// dprintk("dvb_bt8xx: dst enable mask 0x%02x enb 0x%02x \n", mp->dstg.enb.mask, mp->dstg.enb.enable);
		retval = bttv_gpio_enable(bt->bttv_nr,
				mp->enb.mask,
				mp->enb.enable);
		break;
	    case DST_IG_WRITE:
		// dprintk("dvb_bt8xx: dst write gpio mask 0x%02x out 0x%02x\n", mp->dstg.outp.mask, mp->dstg.outp.highvals);
		retval = bttv_write_gpio(bt->bttv_nr,
				mp->outp.mask,
				mp->outp.highvals);

		break;
	    case DST_IG_READ:
		/* read */
		retval =  bttv_read_gpio(bt->bttv_nr, &mp->rd.value);
		// dprintk("dvb_bt8xx: dst read gpio 0x%02x\n", (unsigned)mp->dstg.rd.value);
		break;
	    case DST_IG_TS:
		/* Set packet size */
		bt->TS_Size = mp->psize;
		break;

	    default:
		retval = -EINVAL;
		break;
	}
	up(&bt->gpio_lock);
	return retval;
}

EXPORT_SYMBOL(bt878_device_control);

/***********************/
/* PCI device handling */
/***********************/

static int __devinit bt878_probe(struct pci_dev *dev,
				 const struct pci_device_id *pci_id)
{
	int result;
	unsigned char lat;
	struct bt878 *bt;
#if defined(__powerpc__)
	unsigned int cmd;
#endif

	printk(KERN_INFO "bt878: Bt878 AUDIO function found (%d).\n",
	       bt878_num);
	if (pci_enable_device(dev))
		return -EIO;

	bt = &bt878[bt878_num];
	bt->dev = dev;
	bt->nr = bt878_num;
	bt->shutdown = 0;

	bt->id = dev->device;
	bt->irq = dev->irq;
	bt->bt878_adr = pci_resource_start(dev, 0);
	if (!request_mem_region(pci_resource_start(dev, 0),
				pci_resource_len(dev, 0), "bt878")) {
		result = -EBUSY;
		goto fail0;
	}

	pci_read_config_byte(dev, PCI_CLASS_REVISION, &bt->revision);
	pci_read_config_byte(dev, PCI_LATENCY_TIMER, &lat);
	printk(KERN_INFO "bt878(%d): Bt%x (rev %d) at %02x:%02x.%x, ",
	       bt878_num, bt->id, bt->revision, dev->bus->number,
	       PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
	printk("irq: %d, latency: %d, memory: 0x%lx\n",
	       bt->irq, lat, bt->bt878_adr);


#if defined(__powerpc__)
	/* on OpenFirmware machines (PowerMac at least), PCI memory cycle */
	/* response on cards with no firmware is not enabled by OF */
	pci_read_config_dword(dev, PCI_COMMAND, &cmd);
	cmd = (cmd | PCI_COMMAND_MEMORY);
	pci_write_config_dword(dev, PCI_COMMAND, cmd);
#endif

#ifdef __sparc__
	bt->bt878_mem = (unsigned char *) bt->bt878_adr;
#else
	bt->bt878_mem = ioremap(bt->bt878_adr, 0x1000);
#endif

	/* clear interrupt mask */
	btwrite(0, BT848_INT_MASK);

	result = request_irq(bt->irq, bt878_irq,
			     SA_SHIRQ | SA_INTERRUPT, "bt878",
			     (void *) bt);
	if (result == -EINVAL) {
		printk(KERN_ERR "bt878(%d): Bad irq number or handler\n",
		       bt878_num);
		goto fail1;
	}
	if (result == -EBUSY) {
		printk(KERN_ERR
		       "bt878(%d): IRQ %d busy, change your PnP config in BIOS\n",
		       bt878_num, bt->irq);
		goto fail1;
	}
	if (result < 0)
		goto fail1;

	pci_set_master(dev);
	pci_set_drvdata(dev, bt);

/*        if(init_bt878(btv) < 0) {
		bt878_remove(dev);
		return -EIO;
	}
*/

	if ((result = bt878_mem_alloc(bt))) {
		printk("bt878: failed to allocate memory!\n");
		goto fail2;
	}

	bt878_make_risc(bt);
	btwrite(0, BT878_AINT_MASK);
	bt878_num++;

	return 0;

      fail2:
	free_irq(bt->irq, bt);
      fail1:
	release_mem_region(pci_resource_start(bt->dev, 0),
			   pci_resource_len(bt->dev, 0));
      fail0:
	pci_disable_device(dev);
	return result;
}

static void __devexit bt878_remove(struct pci_dev *pci_dev)
{
	u8 command;
	struct bt878 *bt = pci_get_drvdata(pci_dev);

	if (bt878_verbose)
		printk("bt878(%d): unloading\n", bt->nr);

	/* turn off all capturing, DMA and IRQs */
	btand(~0x13, BT878_AGPIO_DMA_CTL);

	/* first disable interrupts before unmapping the memory! */
	btwrite(0, BT878_AINT_MASK);
	btwrite(~0U, BT878_AINT_STAT);

	/* disable PCI bus-mastering */
	pci_read_config_byte(bt->dev, PCI_COMMAND, &command);
	/* Should this be &=~ ?? */
	command &= ~PCI_COMMAND_MASTER;
	pci_write_config_byte(bt->dev, PCI_COMMAND, command);

	free_irq(bt->irq, bt);
	printk(KERN_DEBUG "bt878_mem: 0x%p.\n", bt->bt878_mem);
	if (bt->bt878_mem)
		iounmap(bt->bt878_mem);

	release_mem_region(pci_resource_start(bt->dev, 0),
			   pci_resource_len(bt->dev, 0));
	/* wake up any waiting processes
	   because shutdown flag is set, no new processes (in this queue)
	   are expected
	 */
	bt->shutdown = 1;
	bt878_mem_free(bt);

	pci_set_drvdata(pci_dev, NULL);
	pci_disable_device(pci_dev);
	return;
}

static struct pci_device_id bt878_pci_tbl[] __devinitdata = {
	{PCI_VENDOR_ID_BROOKTREE, PCI_DEVICE_ID_BROOKTREE_878,
	 PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0},
	{0,}
};

MODULE_DEVICE_TABLE(pci, bt878_pci_tbl);

static struct pci_driver bt878_pci_driver = {
      .name	= "bt878",
      .id_table = bt878_pci_tbl,
      .probe	= bt878_probe,
      .remove	= bt878_remove,
};

static int bt878_pci_driver_registered = 0;

/*******************************/
/* Module management functions */
/*******************************/

static int bt878_init_module(void)
{
	bt878_num = 0;
	bt878_pci_driver_registered = 0;

	printk(KERN_INFO "bt878: AUDIO driver version %d.%d.%d loaded\n",
	       (BT878_VERSION_CODE >> 16) & 0xff,
	       (BT878_VERSION_CODE >> 8) & 0xff,
	       BT878_VERSION_CODE & 0xff);
/*
	bt878_check_chipset();
*/
	/* later we register inside of bt878_find_audio_dma()
	 * because we may want to ignore certain cards */
	bt878_pci_driver_registered = 1;
	return pci_register_driver(&bt878_pci_driver);
}

static void bt878_cleanup_module(void)
{
	if (bt878_pci_driver_registered) {
		bt878_pci_driver_registered = 0;
		pci_unregister_driver(&bt878_pci_driver);
	}
	return;
}

module_init(bt878_init_module);
module_exit(bt878_cleanup_module);

//MODULE_AUTHOR("XXX");
MODULE_LICENSE("GPL");

/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 */