1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * bt878.c: part of the driver for the Pinnacle PCTV Sat DVB PCI card
4 *
5 * Copyright (C) 2002 Peter Hettkamp <peter.hettkamp@htp-tel.de>
6 *
7 * large parts based on the bttv driver
8 * Copyright (C) 1996,97,98 Ralph Metzler (rjkm@metzlerbros.de)
9 * & Marcus Metzler (mocm@metzlerbros.de)
10 * (c) 1999,2000 Gerd Knorr <kraxel@goldbach.in-berlin.de>
11 */
12
13#include <linux/module.h>
14#include <linux/kernel.h>
15#include <linux/pci.h>
16#include <linux/pgtable.h>
17#include <asm/io.h>
18#include <linux/ioport.h>
19#include <asm/page.h>
20#include <linux/types.h>
21#include <linux/interrupt.h>
22#include <linux/kmod.h>
23#include <linux/vmalloc.h>
24#include <linux/init.h>
25
26#include <media/dmxdev.h>
27#include <media/dvbdev.h>
28#include "bt878.h"
29#include "dst_priv.h"
30
31
32/**************************************/
33/* Miscellaneous utility definitions */
34/**************************************/
35
36static unsigned int bt878_verbose = 1;
37static unsigned int bt878_debug;
38
39module_param_named(verbose, bt878_verbose, int, 0444);
40MODULE_PARM_DESC(verbose,
41 "verbose startup messages, default is 1 (yes)");
42module_param_named(debug, bt878_debug, int, 0644);
43MODULE_PARM_DESC(debug, "Turn on/off debugging, default is 0 (off).");
44
45int bt878_num;
46struct bt878 bt878[BT878_MAX];
47
48EXPORT_SYMBOL(bt878_num);
49EXPORT_SYMBOL(bt878);
50
51#define btwrite(dat,adr) bmtwrite((dat), (bt->bt878_mem+(adr)))
52#define btread(adr) bmtread(bt->bt878_mem+(adr))
53
54#define btand(dat,adr) btwrite((dat) & btread(adr), adr)
55#define btor(dat,adr) btwrite((dat) | btread(adr), adr)
56#define btaor(dat,mask,adr) btwrite((dat) | ((mask) & btread(adr)), adr)
57
58#if defined(dprintk)
59#undef dprintk
60#endif
61#define dprintk(fmt, arg...) \
62 do { \
63 if (bt878_debug) \
64 printk(KERN_DEBUG fmt, ##arg); \
65 } while (0)
66
67static void bt878_mem_free(struct bt878 *bt)
68{
69 if (bt->buf_cpu) {
70 dma_free_coherent(dev: &bt->dev->dev, size: bt->buf_size, cpu_addr: bt->buf_cpu,
71 dma_handle: bt->buf_dma);
72 bt->buf_cpu = NULL;
73 }
74
75 if (bt->risc_cpu) {
76 dma_free_coherent(dev: &bt->dev->dev, size: bt->risc_size, cpu_addr: bt->risc_cpu,
77 dma_handle: bt->risc_dma);
78 bt->risc_cpu = NULL;
79 }
80}
81
82static int bt878_mem_alloc(struct bt878 *bt)
83{
84 if (!bt->buf_cpu) {
85 bt->buf_size = 128 * 1024;
86
87 bt->buf_cpu = dma_alloc_coherent(dev: &bt->dev->dev, size: bt->buf_size,
88 dma_handle: &bt->buf_dma, GFP_KERNEL);
89 if (!bt->buf_cpu)
90 return -ENOMEM;
91 }
92
93 if (!bt->risc_cpu) {
94 bt->risc_size = PAGE_SIZE;
95 bt->risc_cpu = dma_alloc_coherent(dev: &bt->dev->dev, size: bt->risc_size,
96 dma_handle: &bt->risc_dma, GFP_KERNEL);
97 if (!bt->risc_cpu) {
98 bt878_mem_free(bt);
99 return -ENOMEM;
100 }
101 }
102
103 return 0;
104}
105
106/* RISC instructions */
107#define RISC_WRITE (0x01 << 28)
108#define RISC_JUMP (0x07 << 28)
109#define RISC_SYNC (0x08 << 28)
110
111/* RISC bits */
112#define RISC_WR_SOL (1 << 27)
113#define RISC_WR_EOL (1 << 26)
114#define RISC_IRQ (1 << 24)
115#define RISC_STATUS(status) ((((~status) & 0x0F) << 20) | ((status & 0x0F) << 16))
116#define RISC_SYNC_RESYNC (1 << 15)
117#define RISC_SYNC_FM1 0x06
118#define RISC_SYNC_VRO 0x0C
119
120#define RISC_FLUSH() bt->risc_pos = 0
121#define RISC_INSTR(instr) bt->risc_cpu[bt->risc_pos++] = cpu_to_le32(instr)
122
123static int bt878_make_risc(struct bt878 *bt)
124{
125 bt->block_bytes = bt->buf_size >> 4;
126 bt->block_count = 1 << 4;
127 bt->line_bytes = bt->block_bytes;
128 bt->line_count = bt->block_count;
129
130 while (bt->line_bytes > 4095) {
131 bt->line_bytes >>= 1;
132 bt->line_count <<= 1;
133 }
134
135 if (bt->line_count > 255) {
136 printk(KERN_ERR "bt878: buffer size error!\n");
137 return -EINVAL;
138 }
139 return 0;
140}
141
142
143static void bt878_risc_program(struct bt878 *bt, u32 op_sync_orin)
144{
145 u32 buf_pos = 0;
146 u32 line;
147
148 RISC_FLUSH();
149 RISC_INSTR(RISC_SYNC | RISC_SYNC_FM1 | op_sync_orin);
150 RISC_INSTR(0);
151
152 dprintk("bt878: risc len lines %u, bytes per line %u\n",
153 bt->line_count, bt->line_bytes);
154 for (line = 0; line < bt->line_count; line++) {
155 // At the beginning of every block we issue an IRQ with previous (finished) block number set
156 if (!(buf_pos % bt->block_bytes))
157 RISC_INSTR(RISC_WRITE | RISC_WR_SOL | RISC_WR_EOL |
158 RISC_IRQ |
159 RISC_STATUS(((buf_pos /
160 bt->block_bytes) +
161 (bt->block_count -
162 1)) %
163 bt->block_count) | bt->
164 line_bytes);
165 else
166 RISC_INSTR(RISC_WRITE | RISC_WR_SOL | RISC_WR_EOL |
167 bt->line_bytes);
168 RISC_INSTR(bt->buf_dma + buf_pos);
169 buf_pos += bt->line_bytes;
170 }
171
172 RISC_INSTR(RISC_SYNC | op_sync_orin | RISC_SYNC_VRO);
173 RISC_INSTR(0);
174
175 RISC_INSTR(RISC_JUMP);
176 RISC_INSTR(bt->risc_dma);
177
178 btwrite((bt->line_count << 16) | bt->line_bytes, BT878_APACK_LEN);
179}
180
181/*****************************/
182/* Start/Stop grabbing funcs */
183/*****************************/
184
185void bt878_start(struct bt878 *bt, u32 controlreg, u32 op_sync_orin,
186 u32 irq_err_ignore)
187{
188 u32 int_mask;
189
190 dprintk("bt878 debug: bt878_start (ctl=%8.8x)\n", controlreg);
191 /* complete the writing of the risc dma program now we have
192 * the card specifics
193 */
194 bt878_risc_program(bt, op_sync_orin);
195 controlreg &= ~0x1f;
196 controlreg |= 0x1b;
197
198 btwrite(bt->risc_dma, BT878_ARISC_START);
199
200 /* original int mask had :
201 * 6 2 8 4 0
202 * 1111 1111 1000 0000 0000
203 * SCERR|OCERR|PABORT|RIPERR|FDSR|FTRGT|FBUS|RISCI
204 * Hacked for DST to:
205 * SCERR | OCERR | FDSR | FTRGT | FBUS | RISCI
206 */
207 int_mask = BT878_ASCERR | BT878_AOCERR | BT878_APABORT |
208 BT878_ARIPERR | BT878_APPERR | BT878_AFDSR | BT878_AFTRGT |
209 BT878_AFBUS | BT878_ARISCI;
210
211
212 /* ignore pesky bits */
213 int_mask &= ~irq_err_ignore;
214
215 btwrite(int_mask, BT878_AINT_MASK);
216 btwrite(controlreg, BT878_AGPIO_DMA_CTL);
217}
218
219void bt878_stop(struct bt878 *bt)
220{
221 u32 stat;
222 int i = 0;
223
224 dprintk("bt878 debug: bt878_stop\n");
225
226 btwrite(0, BT878_AINT_MASK);
227 btand(~0x13, BT878_AGPIO_DMA_CTL);
228
229 do {
230 stat = btread(BT878_AINT_STAT);
231 if (!(stat & BT878_ARISC_EN))
232 break;
233 i++;
234 } while (i < 500);
235
236 dprintk("bt878(%d) debug: bt878_stop, i=%d, stat=0x%8.8x\n",
237 bt->nr, i, stat);
238}
239
240EXPORT_SYMBOL(bt878_start);
241EXPORT_SYMBOL(bt878_stop);
242
243/*****************************/
244/* Interrupt service routine */
245/*****************************/
246
247static irqreturn_t bt878_irq(int irq, void *dev_id)
248{
249 u32 stat, astat, mask;
250 int count;
251 struct bt878 *bt;
252
253 bt = (struct bt878 *) dev_id;
254
255 count = 0;
256 while (1) {
257 stat = btread(BT878_AINT_STAT);
258 mask = btread(BT878_AINT_MASK);
259 if (!(astat = (stat & mask)))
260 return IRQ_NONE; /* this interrupt is not for me */
261/* dprintk("bt878(%d) debug: irq count %d, stat 0x%8.8x, mask 0x%8.8x\n",bt->nr,count,stat,mask); */
262 btwrite(astat, BT878_AINT_STAT); /* try to clear interrupt condition */
263
264
265 if (astat & (BT878_ASCERR | BT878_AOCERR)) {
266 if (bt878_verbose) {
267 printk(KERN_INFO
268 "bt878(%d): irq%s%s risc_pc=%08x\n",
269 bt->nr,
270 (astat & BT878_ASCERR) ? " SCERR" :
271 "",
272 (astat & BT878_AOCERR) ? " OCERR" :
273 "", btread(BT878_ARISC_PC));
274 }
275 }
276 if (astat & (BT878_APABORT | BT878_ARIPERR | BT878_APPERR)) {
277 if (bt878_verbose) {
278 printk(KERN_INFO
279 "bt878(%d): irq%s%s%s risc_pc=%08x\n",
280 bt->nr,
281 (astat & BT878_APABORT) ? " PABORT" :
282 "",
283 (astat & BT878_ARIPERR) ? " RIPERR" :
284 "",
285 (astat & BT878_APPERR) ? " PPERR" :
286 "", btread(BT878_ARISC_PC));
287 }
288 }
289 if (astat & (BT878_AFDSR | BT878_AFTRGT | BT878_AFBUS)) {
290 if (bt878_verbose) {
291 printk(KERN_INFO
292 "bt878(%d): irq%s%s%s risc_pc=%08x\n",
293 bt->nr,
294 (astat & BT878_AFDSR) ? " FDSR" : "",
295 (astat & BT878_AFTRGT) ? " FTRGT" :
296 "",
297 (astat & BT878_AFBUS) ? " FBUS" : "",
298 btread(BT878_ARISC_PC));
299 }
300 }
301 if (astat & BT878_ARISCI) {
302 bt->finished_block = (stat & BT878_ARISCS) >> 28;
303 if (bt->bh_work.func)
304 queue_work(wq: system_bh_wq, work: &bt->bh_work);
305 break;
306 }
307 count++;
308 if (count > 20) {
309 btwrite(0, BT878_AINT_MASK);
310 printk(KERN_ERR
311 "bt878(%d): IRQ lockup, cleared int mask\n",
312 bt->nr);
313 break;
314 }
315 }
316 return IRQ_HANDLED;
317}
318
319int
320bt878_device_control(struct bt878 *bt, unsigned int cmd, union dst_gpio_packet *mp)
321{
322 int retval;
323
324 retval = 0;
325 if (mutex_lock_interruptible(&bt->gpio_lock))
326 return -ERESTARTSYS;
327 /* special gpio signal */
328 switch (cmd) {
329 case DST_IG_ENABLE:
330 // dprintk("dvb_bt8xx: dst enable mask 0x%02x enb 0x%02x \n", mp->dstg.enb.mask, mp->dstg.enb.enable);
331 retval = bttv_gpio_enable(card: bt->bttv_nr,
332 mask: mp->enb.mask,
333 data: mp->enb.enable);
334 break;
335 case DST_IG_WRITE:
336 // dprintk("dvb_bt8xx: dst write gpio mask 0x%02x out 0x%02x\n", mp->dstg.outp.mask, mp->dstg.outp.highvals);
337 retval = bttv_write_gpio(card: bt->bttv_nr,
338 mask: mp->outp.mask,
339 data: mp->outp.highvals);
340
341 break;
342 case DST_IG_READ:
343 /* read */
344 retval = bttv_read_gpio(card: bt->bttv_nr, data: &mp->rd.value);
345 // dprintk("dvb_bt8xx: dst read gpio 0x%02x\n", (unsigned)mp->dstg.rd.value);
346 break;
347 case DST_IG_TS:
348 /* Set packet size */
349 bt->TS_Size = mp->psize;
350 break;
351
352 default:
353 retval = -EINVAL;
354 break;
355 }
356 mutex_unlock(lock: &bt->gpio_lock);
357 return retval;
358}
359
360EXPORT_SYMBOL(bt878_device_control);
361
362#define BROOKTREE_878_DEVICE(vend, dev, name) \
363 { \
364 .vendor = PCI_VENDOR_ID_BROOKTREE, \
365 .device = PCI_DEVICE_ID_BROOKTREE_878, \
366 .subvendor = (vend), .subdevice = (dev), \
367 .driver_data = (unsigned long) name \
368 }
369
370static const struct pci_device_id bt878_pci_tbl[] = {
371 BROOKTREE_878_DEVICE(0x0071, 0x0101, "Nebula Electronics DigiTV"),
372 BROOKTREE_878_DEVICE(0x1461, 0x0761, "AverMedia AverTV DVB-T 761"),
373 BROOKTREE_878_DEVICE(0x11bd, 0x001c, "Pinnacle PCTV Sat"),
374 BROOKTREE_878_DEVICE(0x11bd, 0x0026, "Pinnacle PCTV SAT CI"),
375 BROOKTREE_878_DEVICE(0x1822, 0x0001, "Twinhan VisionPlus DVB"),
376 BROOKTREE_878_DEVICE(0x270f, 0xfc00,
377 "ChainTech digitop DST-1000 DVB-S"),
378 BROOKTREE_878_DEVICE(0x1461, 0x0771, "AVermedia AverTV DVB-T 771"),
379 BROOKTREE_878_DEVICE(0x18ac, 0xdb10, "DViCO FusionHDTV DVB-T Lite"),
380 BROOKTREE_878_DEVICE(0x18ac, 0xdb11, "Ultraview DVB-T Lite"),
381 BROOKTREE_878_DEVICE(0x18ac, 0xd500, "DViCO FusionHDTV 5 Lite"),
382 BROOKTREE_878_DEVICE(0x7063, 0x2000, "pcHDTV HD-2000 TV"),
383 BROOKTREE_878_DEVICE(0x1822, 0x0026, "DNTV Live! Mini"),
384 { }
385};
386
387MODULE_DEVICE_TABLE(pci, bt878_pci_tbl);
388
389static const char * card_name(const struct pci_device_id *id)
390{
391 return id->driver_data ? (const char *)id->driver_data : "Unknown";
392}
393
394/***********************/
395/* PCI device handling */
396/***********************/
397
398static int bt878_probe(struct pci_dev *dev, const struct pci_device_id *pci_id)
399{
400 int result = 0;
401 unsigned char lat;
402 struct bt878 *bt;
403 unsigned int cardid;
404
405 printk(KERN_INFO "bt878: Bt878 AUDIO function found (%d).\n",
406 bt878_num);
407 if (bt878_num >= BT878_MAX) {
408 printk(KERN_ERR "bt878: Too many devices inserted\n");
409 return -ENOMEM;
410 }
411 if (pci_enable_device(dev))
412 return -EIO;
413
414 cardid = dev->subsystem_device << 16;
415 cardid |= dev->subsystem_vendor;
416
417 printk(KERN_INFO "%s: card id=[0x%x],[ %s ] has DVB functions.\n",
418 __func__, cardid, card_name(pci_id));
419
420 bt = &bt878[bt878_num];
421 bt->dev = dev;
422 bt->nr = bt878_num;
423 bt->shutdown = 0;
424
425 bt->id = dev->device;
426 bt->irq = dev->irq;
427 bt->bt878_adr = pci_resource_start(dev, 0);
428 if (!request_mem_region(pci_resource_start(dev, 0),
429 pci_resource_len(dev, 0), "bt878")) {
430 result = -EBUSY;
431 goto fail0;
432 }
433
434 bt->revision = dev->revision;
435 pci_read_config_byte(dev, PCI_LATENCY_TIMER, val: &lat);
436
437
438 printk(KERN_INFO "bt878(%d): Bt%x (rev %d) at %02x:%02x.%x, ",
439 bt878_num, bt->id, bt->revision, dev->bus->number,
440 PCI_SLOT(dev->devfn), PCI_FUNC(dev->devfn));
441 printk("irq: %d, latency: %d, memory: 0x%lx\n",
442 bt->irq, lat, bt->bt878_adr);
443
444#ifdef __sparc__
445 bt->bt878_mem = (unsigned char *) bt->bt878_adr;
446#else
447 bt->bt878_mem = ioremap(offset: bt->bt878_adr, size: 0x1000);
448#endif
449
450 /* clear interrupt mask */
451 btwrite(0, BT848_INT_MASK);
452
453 result = request_irq(irq: bt->irq, handler: bt878_irq,
454 IRQF_SHARED, name: "bt878", dev: (void *) bt);
455 if (result == -EINVAL) {
456 printk(KERN_ERR "bt878(%d): Bad irq number or handler\n",
457 bt878_num);
458 goto fail1;
459 }
460 if (result == -EBUSY) {
461 printk(KERN_ERR
462 "bt878(%d): IRQ %d busy, change your PnP config in BIOS\n",
463 bt878_num, bt->irq);
464 goto fail1;
465 }
466 if (result < 0)
467 goto fail1;
468
469 pci_set_master(dev);
470 pci_set_drvdata(pdev: dev, data: bt);
471
472 if ((result = bt878_mem_alloc(bt))) {
473 printk(KERN_ERR "bt878: failed to allocate memory!\n");
474 goto fail2;
475 }
476
477 bt878_make_risc(bt);
478 btwrite(0, BT878_AINT_MASK);
479 bt878_num++;
480
481 if (!bt->bh_work.func)
482 disable_work_sync(work: &bt->bh_work);
483
484 return 0;
485
486 fail2:
487 free_irq(bt->irq, bt);
488 fail1:
489 release_mem_region(pci_resource_start(bt->dev, 0),
490 pci_resource_len(bt->dev, 0));
491 fail0:
492 pci_disable_device(dev);
493 return result;
494}
495
496static void bt878_remove(struct pci_dev *pci_dev)
497{
498 u8 command;
499 struct bt878 *bt = pci_get_drvdata(pdev: pci_dev);
500
501 if (bt878_verbose)
502 printk(KERN_INFO "bt878(%d): unloading\n", bt->nr);
503
504 /* turn off all capturing, DMA and IRQs */
505 btand(~0x13, BT878_AGPIO_DMA_CTL);
506
507 /* first disable interrupts before unmapping the memory! */
508 btwrite(0, BT878_AINT_MASK);
509 btwrite(~0U, BT878_AINT_STAT);
510
511 /* disable PCI bus-mastering */
512 pci_read_config_byte(dev: bt->dev, PCI_COMMAND, val: &command);
513 /* Should this be &=~ ?? */
514 command &= ~PCI_COMMAND_MASTER;
515 pci_write_config_byte(dev: bt->dev, PCI_COMMAND, val: command);
516
517 free_irq(bt->irq, bt);
518 printk(KERN_DEBUG "bt878_mem: 0x%p.\n", bt->bt878_mem);
519 if (bt->bt878_mem)
520 iounmap(addr: bt->bt878_mem);
521
522 release_mem_region(pci_resource_start(bt->dev, 0),
523 pci_resource_len(bt->dev, 0));
524 /* wake up any waiting processes
525 because shutdown flag is set, no new processes (in this queue)
526 are expected
527 */
528 bt->shutdown = 1;
529 bt878_mem_free(bt);
530
531 pci_disable_device(dev: pci_dev);
532 return;
533}
534
535static struct pci_driver bt878_pci_driver = {
536 .name = "bt878",
537 .id_table = bt878_pci_tbl,
538 .probe = bt878_probe,
539 .remove = bt878_remove,
540};
541
542/*******************************/
543/* Module management functions */
544/*******************************/
545
546static int __init bt878_init_module(void)
547{
548 bt878_num = 0;
549
550 printk(KERN_INFO "bt878: AUDIO driver version %d.%d.%d loaded\n",
551 (BT878_VERSION_CODE >> 16) & 0xff,
552 (BT878_VERSION_CODE >> 8) & 0xff,
553 BT878_VERSION_CODE & 0xff);
554
555 return pci_register_driver(&bt878_pci_driver);
556}
557
558static void __exit bt878_cleanup_module(void)
559{
560 pci_unregister_driver(dev: &bt878_pci_driver);
561}
562
563module_init(bt878_init_module);
564module_exit(bt878_cleanup_module);
565
566MODULE_DESCRIPTION("DVB/ATSC Support for bt878 based TV cards");
567MODULE_LICENSE("GPL");
568

source code of linux/drivers/media/pci/bt8xx/bt878.c