1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 *
4 * Support for the mpeg transport stream transfers
5 * PCI function #2 of the cx2388x.
6 *
7 * (c) 2004 Jelle Foks <jelle@foks.us>
8 * (c) 2004 Chris Pascoe <c.pascoe@itee.uq.edu.au>
9 * (c) 2004 Gerd Knorr <kraxel@bytesex.org>
10 */
11
12 #include "cx88.h"
13
14 #include <linux/module.h>
15 #include <linux/slab.h>
16 #include <linux/init.h>
17 #include <linux/device.h>
18 #include <linux/dma-mapping.h>
19 #include <linux/interrupt.h>
20 #include <linux/delay.h>
21
22 /* ------------------------------------------------------------------ */
23
24 MODULE_DESCRIPTION("mpeg driver for cx2388x based TV cards");
25 MODULE_AUTHOR("Jelle Foks <jelle@foks.us>");
26 MODULE_AUTHOR("Chris Pascoe <c.pascoe@itee.uq.edu.au>");
27 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
28 MODULE_LICENSE("GPL");
29 MODULE_VERSION(CX88_VERSION);
30
31 static unsigned int debug;
32 module_param(debug, int, 0644);
33 MODULE_PARM_DESC(debug, "enable debug messages [mpeg]");
34
35 #define dprintk(level, fmt, arg...) do { \
36 if (debug + 1 > level) \
37 printk(KERN_DEBUG pr_fmt("%s: mpeg:" fmt), \
38 __func__, ##arg); \
39 } while (0)
40
41 #if defined(CONFIG_MODULES) && defined(MODULE)
request_module_async(struct work_struct * work)42 static void request_module_async(struct work_struct *work)
43 {
44 struct cx8802_dev *dev = container_of(work, struct cx8802_dev,
45 request_module_wk);
46
47 if (dev->core->board.mpeg & CX88_MPEG_DVB)
48 request_module("cx88-dvb");
49 if (dev->core->board.mpeg & CX88_MPEG_BLACKBIRD)
50 request_module("cx88-blackbird");
51 }
52
request_modules(struct cx8802_dev * dev)53 static void request_modules(struct cx8802_dev *dev)
54 {
55 INIT_WORK(&dev->request_module_wk, request_module_async);
56 schedule_work(&dev->request_module_wk);
57 }
58
flush_request_modules(struct cx8802_dev * dev)59 static void flush_request_modules(struct cx8802_dev *dev)
60 {
61 flush_work(&dev->request_module_wk);
62 }
63 #else
64 #define request_modules(dev)
65 #define flush_request_modules(dev)
66 #endif /* CONFIG_MODULES */
67
68 static LIST_HEAD(cx8802_devlist);
69 static DEFINE_MUTEX(cx8802_mutex);
70 /* ------------------------------------------------------------------ */
71
cx8802_start_dma(struct cx8802_dev * dev,struct cx88_dmaqueue * q,struct cx88_buffer * buf)72 int cx8802_start_dma(struct cx8802_dev *dev,
73 struct cx88_dmaqueue *q,
74 struct cx88_buffer *buf)
75 {
76 struct cx88_core *core = dev->core;
77
78 dprintk(1, "w: %d, h: %d, f: %d\n",
79 core->width, core->height, core->field);
80
81 /* setup fifo + format */
82 cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH28],
83 dev->ts_packet_size, buf->risc.dma);
84
85 /* write TS length to chip */
86 cx_write(MO_TS_LNGTH, dev->ts_packet_size);
87
88 /*
89 * FIXME: this needs a review.
90 * also: move to cx88-blackbird + cx88-dvb source files?
91 */
92
93 dprintk(1, "core->active_type_id = 0x%08x\n", core->active_type_id);
94
95 if ((core->active_type_id == CX88_MPEG_DVB) &&
96 (core->board.mpeg & CX88_MPEG_DVB)) {
97 dprintk(1, "cx8802_start_dma doing .dvb\n");
98 /* negedge driven & software reset */
99 cx_write(TS_GEN_CNTRL, 0x0040 | dev->ts_gen_cntrl);
100 udelay(100);
101 cx_write(MO_PINMUX_IO, 0x00);
102 cx_write(TS_HW_SOP_CNTRL, 0x47 << 16 | 188 << 4 | 0x01);
103 switch (core->boardnr) {
104 case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_Q:
105 case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_T:
106 case CX88_BOARD_DVICO_FUSIONHDTV_5_GOLD:
107 case CX88_BOARD_PCHDTV_HD5500:
108 cx_write(TS_SOP_STAT, 1 << 13);
109 break;
110 case CX88_BOARD_SAMSUNG_SMT_7020:
111 cx_write(TS_SOP_STAT, 0x00);
112 break;
113 case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
114 case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
115 /* Enable MPEG parallel IO and video signal pins */
116 cx_write(MO_PINMUX_IO, 0x88);
117 udelay(100);
118 break;
119 case CX88_BOARD_HAUPPAUGE_HVR1300:
120 /* Enable MPEG parallel IO and video signal pins */
121 cx_write(MO_PINMUX_IO, 0x88);
122 cx_write(TS_SOP_STAT, 0);
123 cx_write(TS_VALERR_CNTRL, 0);
124 break;
125 case CX88_BOARD_PINNACLE_PCTV_HD_800i:
126 /* Enable MPEG parallel IO and video signal pins */
127 cx_write(MO_PINMUX_IO, 0x88);
128 cx_write(TS_HW_SOP_CNTRL, (0x47 << 16) | (188 << 4));
129 dev->ts_gen_cntrl = 5;
130 cx_write(TS_SOP_STAT, 0);
131 cx_write(TS_VALERR_CNTRL, 0);
132 udelay(100);
133 break;
134 default:
135 cx_write(TS_SOP_STAT, 0x00);
136 break;
137 }
138 cx_write(TS_GEN_CNTRL, dev->ts_gen_cntrl);
139 udelay(100);
140 } else if ((core->active_type_id == CX88_MPEG_BLACKBIRD) &&
141 (core->board.mpeg & CX88_MPEG_BLACKBIRD)) {
142 dprintk(1, "cx8802_start_dma doing .blackbird\n");
143 cx_write(MO_PINMUX_IO, 0x88); /* enable MPEG parallel IO */
144
145 /* punctured clock TS & posedge driven & software reset */
146 cx_write(TS_GEN_CNTRL, 0x46);
147 udelay(100);
148
149 cx_write(TS_HW_SOP_CNTRL, 0x408); /* mpeg start byte */
150 cx_write(TS_VALERR_CNTRL, 0x2000);
151
152 /* punctured clock TS & posedge driven */
153 cx_write(TS_GEN_CNTRL, 0x06);
154 udelay(100);
155 } else {
156 pr_err("%s() Failed. Unsupported value in .mpeg (0x%08x)\n",
157 __func__, core->board.mpeg);
158 return -EINVAL;
159 }
160
161 /* reset counter */
162 cx_write(MO_TS_GPCNTRL, GP_COUNT_CONTROL_RESET);
163 q->count = 0;
164
165 /* enable irqs */
166 dprintk(1, "setting the interrupt mask\n");
167 cx_set(MO_PCI_INTMSK, core->pci_irqmask | PCI_INT_TSINT);
168 cx_set(MO_TS_INTMSK, 0x1f0011);
169
170 /* start dma */
171 cx_set(MO_DEV_CNTRL2, (1 << 5));
172 cx_set(MO_TS_DMACNTRL, 0x11);
173 return 0;
174 }
175 EXPORT_SYMBOL(cx8802_start_dma);
176
cx8802_stop_dma(struct cx8802_dev * dev)177 static int cx8802_stop_dma(struct cx8802_dev *dev)
178 {
179 struct cx88_core *core = dev->core;
180
181 dprintk(1, "\n");
182
183 /* stop dma */
184 cx_clear(MO_TS_DMACNTRL, 0x11);
185
186 /* disable irqs */
187 cx_clear(MO_PCI_INTMSK, PCI_INT_TSINT);
188 cx_clear(MO_TS_INTMSK, 0x1f0011);
189
190 /* Reset the controller */
191 cx_write(TS_GEN_CNTRL, 0xcd);
192 return 0;
193 }
194
cx8802_restart_queue(struct cx8802_dev * dev,struct cx88_dmaqueue * q)195 static int cx8802_restart_queue(struct cx8802_dev *dev,
196 struct cx88_dmaqueue *q)
197 {
198 struct cx88_buffer *buf;
199
200 dprintk(1, "\n");
201 if (list_empty(&q->active))
202 return 0;
203
204 buf = list_entry(q->active.next, struct cx88_buffer, list);
205 dprintk(2, "restart_queue [%p/%d]: restart dma\n",
206 buf, buf->vb.vb2_buf.index);
207 cx8802_start_dma(dev, q, buf);
208 return 0;
209 }
210
211 /* ------------------------------------------------------------------ */
212
cx8802_buf_prepare(struct vb2_queue * q,struct cx8802_dev * dev,struct cx88_buffer * buf)213 int cx8802_buf_prepare(struct vb2_queue *q, struct cx8802_dev *dev,
214 struct cx88_buffer *buf)
215 {
216 int size = dev->ts_packet_size * dev->ts_packet_count;
217 struct sg_table *sgt = vb2_dma_sg_plane_desc(&buf->vb.vb2_buf, 0);
218 struct cx88_riscmem *risc = &buf->risc;
219 int rc;
220
221 if (vb2_plane_size(&buf->vb.vb2_buf, 0) < size)
222 return -EINVAL;
223 vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size);
224
225 rc = cx88_risc_databuffer(dev->pci, risc, sgt->sgl,
226 dev->ts_packet_size, dev->ts_packet_count, 0);
227 if (rc) {
228 if (risc->cpu)
229 pci_free_consistent(dev->pci, risc->size,
230 risc->cpu, risc->dma);
231 memset(risc, 0, sizeof(*risc));
232 return rc;
233 }
234 return 0;
235 }
236 EXPORT_SYMBOL(cx8802_buf_prepare);
237
cx8802_buf_queue(struct cx8802_dev * dev,struct cx88_buffer * buf)238 void cx8802_buf_queue(struct cx8802_dev *dev, struct cx88_buffer *buf)
239 {
240 struct cx88_buffer *prev;
241 struct cx88_dmaqueue *cx88q = &dev->mpegq;
242
243 dprintk(1, "\n");
244 /* add jump to start */
245 buf->risc.cpu[1] = cpu_to_le32(buf->risc.dma + 8);
246 buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_CNT_INC);
247 buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma + 8);
248
249 if (list_empty(&cx88q->active)) {
250 dprintk(1, "queue is empty - first active\n");
251 list_add_tail(&buf->list, &cx88q->active);
252 dprintk(1, "[%p/%d] %s - first active\n",
253 buf, buf->vb.vb2_buf.index, __func__);
254
255 } else {
256 buf->risc.cpu[0] |= cpu_to_le32(RISC_IRQ1);
257 dprintk(1, "queue is not empty - append to active\n");
258 prev = list_entry(cx88q->active.prev, struct cx88_buffer, list);
259 list_add_tail(&buf->list, &cx88q->active);
260 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
261 dprintk(1, "[%p/%d] %s - append to active\n",
262 buf, buf->vb.vb2_buf.index, __func__);
263 }
264 }
265 EXPORT_SYMBOL(cx8802_buf_queue);
266
267 /* ----------------------------------------------------------- */
268
do_cancel_buffers(struct cx8802_dev * dev)269 static void do_cancel_buffers(struct cx8802_dev *dev)
270 {
271 struct cx88_dmaqueue *q = &dev->mpegq;
272 struct cx88_buffer *buf;
273 unsigned long flags;
274
275 spin_lock_irqsave(&dev->slock, flags);
276 while (!list_empty(&q->active)) {
277 buf = list_entry(q->active.next, struct cx88_buffer, list);
278 list_del(&buf->list);
279 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
280 }
281 spin_unlock_irqrestore(&dev->slock, flags);
282 }
283
cx8802_cancel_buffers(struct cx8802_dev * dev)284 void cx8802_cancel_buffers(struct cx8802_dev *dev)
285 {
286 dprintk(1, "\n");
287 cx8802_stop_dma(dev);
288 do_cancel_buffers(dev);
289 }
290 EXPORT_SYMBOL(cx8802_cancel_buffers);
291
292 static const char *cx88_mpeg_irqs[32] = {
293 "ts_risci1", NULL, NULL, NULL,
294 "ts_risci2", NULL, NULL, NULL,
295 "ts_oflow", NULL, NULL, NULL,
296 "ts_sync", NULL, NULL, NULL,
297 "opc_err", "par_err", "rip_err", "pci_abort",
298 "ts_err?",
299 };
300
cx8802_mpeg_irq(struct cx8802_dev * dev)301 static void cx8802_mpeg_irq(struct cx8802_dev *dev)
302 {
303 struct cx88_core *core = dev->core;
304 u32 status, mask, count;
305
306 dprintk(1, "\n");
307 status = cx_read(MO_TS_INTSTAT);
308 mask = cx_read(MO_TS_INTMSK);
309 if (0 == (status & mask))
310 return;
311
312 cx_write(MO_TS_INTSTAT, status);
313
314 if (debug || (status & mask & ~0xff))
315 cx88_print_irqbits("irq mpeg ",
316 cx88_mpeg_irqs, ARRAY_SIZE(cx88_mpeg_irqs),
317 status, mask);
318
319 /* risc op code error */
320 if (status & (1 << 16)) {
321 pr_warn("mpeg risc op code error\n");
322 cx_clear(MO_TS_DMACNTRL, 0x11);
323 cx88_sram_channel_dump(dev->core,
324 &cx88_sram_channels[SRAM_CH28]);
325 }
326
327 /* risc1 y */
328 if (status & 0x01) {
329 dprintk(1, "wake up\n");
330 spin_lock(&dev->slock);
331 count = cx_read(MO_TS_GPCNT);
332 cx88_wakeup(dev->core, &dev->mpegq, count);
333 spin_unlock(&dev->slock);
334 }
335
336 /* other general errors */
337 if (status & 0x1f0100) {
338 dprintk(0, "general errors: 0x%08x\n", status & 0x1f0100);
339 spin_lock(&dev->slock);
340 cx8802_stop_dma(dev);
341 spin_unlock(&dev->slock);
342 }
343 }
344
345 #define MAX_IRQ_LOOP 10
346
cx8802_irq(int irq,void * dev_id)347 static irqreturn_t cx8802_irq(int irq, void *dev_id)
348 {
349 struct cx8802_dev *dev = dev_id;
350 struct cx88_core *core = dev->core;
351 u32 status;
352 int loop, handled = 0;
353
354 for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
355 status = cx_read(MO_PCI_INTSTAT) &
356 (core->pci_irqmask | PCI_INT_TSINT);
357 if (status == 0)
358 goto out;
359 dprintk(1, "cx8802_irq\n");
360 dprintk(1, " loop: %d/%d\n", loop, MAX_IRQ_LOOP);
361 dprintk(1, " status: %d\n", status);
362 handled = 1;
363 cx_write(MO_PCI_INTSTAT, status);
364
365 if (status & core->pci_irqmask)
366 cx88_core_irq(core, status);
367 if (status & PCI_INT_TSINT)
368 cx8802_mpeg_irq(dev);
369 }
370 if (loop == MAX_IRQ_LOOP) {
371 dprintk(0, "clearing mask\n");
372 pr_warn("irq loop -- clearing mask\n");
373 cx_write(MO_PCI_INTMSK, 0);
374 }
375
376 out:
377 return IRQ_RETVAL(handled);
378 }
379
cx8802_init_common(struct cx8802_dev * dev)380 static int cx8802_init_common(struct cx8802_dev *dev)
381 {
382 struct cx88_core *core = dev->core;
383 int err;
384
385 /* pci init */
386 if (pci_enable_device(dev->pci))
387 return -EIO;
388 pci_set_master(dev->pci);
389 err = pci_set_dma_mask(dev->pci, DMA_BIT_MASK(32));
390 if (err) {
391 pr_err("Oops: no 32bit PCI DMA ???\n");
392 return -EIO;
393 }
394
395 dev->pci_rev = dev->pci->revision;
396 pci_read_config_byte(dev->pci, PCI_LATENCY_TIMER, &dev->pci_lat);
397 pr_info("found at %s, rev: %d, irq: %d, latency: %d, mmio: 0x%llx\n",
398 pci_name(dev->pci), dev->pci_rev, dev->pci->irq,
399 dev->pci_lat,
400 (unsigned long long)pci_resource_start(dev->pci, 0));
401
402 /* initialize driver struct */
403 spin_lock_init(&dev->slock);
404
405 /* init dma queue */
406 INIT_LIST_HEAD(&dev->mpegq.active);
407
408 /* get irq */
409 err = request_irq(dev->pci->irq, cx8802_irq,
410 IRQF_SHARED, dev->core->name, dev);
411 if (err < 0) {
412 pr_err("can't get IRQ %d\n", dev->pci->irq);
413 return err;
414 }
415 cx_set(MO_PCI_INTMSK, core->pci_irqmask);
416
417 /* everything worked */
418 pci_set_drvdata(dev->pci, dev);
419 return 0;
420 }
421
cx8802_fini_common(struct cx8802_dev * dev)422 static void cx8802_fini_common(struct cx8802_dev *dev)
423 {
424 dprintk(2, "\n");
425 cx8802_stop_dma(dev);
426 pci_disable_device(dev->pci);
427
428 /* unregister stuff */
429 free_irq(dev->pci->irq, dev);
430 }
431
432 /* ----------------------------------------------------------- */
433
cx8802_suspend_common(struct pci_dev * pci_dev,pm_message_t state)434 static int cx8802_suspend_common(struct pci_dev *pci_dev, pm_message_t state)
435 {
436 struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
437 unsigned long flags;
438
439 /* stop mpeg dma */
440 spin_lock_irqsave(&dev->slock, flags);
441 if (!list_empty(&dev->mpegq.active)) {
442 dprintk(2, "suspend\n");
443 pr_info("suspend mpeg\n");
444 cx8802_stop_dma(dev);
445 }
446 spin_unlock_irqrestore(&dev->slock, flags);
447
448 /* FIXME -- shutdown device */
449 cx88_shutdown(dev->core);
450
451 pci_save_state(pci_dev);
452 if (pci_set_power_state(pci_dev,
453 pci_choose_state(pci_dev, state)) != 0) {
454 pci_disable_device(pci_dev);
455 dev->state.disabled = 1;
456 }
457 return 0;
458 }
459
cx8802_resume_common(struct pci_dev * pci_dev)460 static int cx8802_resume_common(struct pci_dev *pci_dev)
461 {
462 struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
463 unsigned long flags;
464 int err;
465
466 if (dev->state.disabled) {
467 err = pci_enable_device(pci_dev);
468 if (err) {
469 pr_err("can't enable device\n");
470 return err;
471 }
472 dev->state.disabled = 0;
473 }
474 err = pci_set_power_state(pci_dev, PCI_D0);
475 if (err) {
476 pr_err("can't enable device\n");
477 pci_disable_device(pci_dev);
478 dev->state.disabled = 1;
479
480 return err;
481 }
482 pci_restore_state(pci_dev);
483
484 /* FIXME: re-initialize hardware */
485 cx88_reset(dev->core);
486
487 /* restart video+vbi capture */
488 spin_lock_irqsave(&dev->slock, flags);
489 if (!list_empty(&dev->mpegq.active)) {
490 pr_info("resume mpeg\n");
491 cx8802_restart_queue(dev, &dev->mpegq);
492 }
493 spin_unlock_irqrestore(&dev->slock, flags);
494
495 return 0;
496 }
497
cx8802_get_driver(struct cx8802_dev * dev,enum cx88_board_type btype)498 struct cx8802_driver *cx8802_get_driver(struct cx8802_dev *dev,
499 enum cx88_board_type btype)
500 {
501 struct cx8802_driver *d;
502
503 list_for_each_entry(d, &dev->drvlist, drvlist)
504 if (d->type_id == btype)
505 return d;
506
507 return NULL;
508 }
509 EXPORT_SYMBOL(cx8802_get_driver);
510
511 /* Driver asked for hardware access. */
cx8802_request_acquire(struct cx8802_driver * drv)512 static int cx8802_request_acquire(struct cx8802_driver *drv)
513 {
514 struct cx88_core *core = drv->core;
515 unsigned int i;
516
517 /* Fail a request for hardware if the device is busy. */
518 if (core->active_type_id != CX88_BOARD_NONE &&
519 core->active_type_id != drv->type_id)
520 return -EBUSY;
521
522 if (drv->type_id == CX88_MPEG_DVB) {
523 /* When switching to DVB, always set the input to the tuner */
524 core->last_analog_input = core->input;
525 core->input = 0;
526 for (i = 0;
527 i < ARRAY_SIZE(core->board.input);
528 i++) {
529 if (core->board.input[i].type == CX88_VMUX_DVB) {
530 core->input = i;
531 break;
532 }
533 }
534 }
535
536 if (drv->advise_acquire) {
537 core->active_ref++;
538 if (core->active_type_id == CX88_BOARD_NONE) {
539 core->active_type_id = drv->type_id;
540 drv->advise_acquire(drv);
541 }
542
543 dprintk(1, "Post acquire GPIO=%x\n", cx_read(MO_GP0_IO));
544 }
545
546 return 0;
547 }
548
549 /* Driver asked to release hardware. */
cx8802_request_release(struct cx8802_driver * drv)550 static int cx8802_request_release(struct cx8802_driver *drv)
551 {
552 struct cx88_core *core = drv->core;
553
554 if (drv->advise_release && --core->active_ref == 0) {
555 if (drv->type_id == CX88_MPEG_DVB) {
556 /*
557 * If the DVB driver is releasing, reset the input
558 * state to the last configured analog input
559 */
560 core->input = core->last_analog_input;
561 }
562
563 drv->advise_release(drv);
564 core->active_type_id = CX88_BOARD_NONE;
565 dprintk(1, "Post release GPIO=%x\n", cx_read(MO_GP0_IO));
566 }
567
568 return 0;
569 }
570
cx8802_check_driver(struct cx8802_driver * drv)571 static int cx8802_check_driver(struct cx8802_driver *drv)
572 {
573 if (!drv)
574 return -ENODEV;
575
576 if ((drv->type_id != CX88_MPEG_DVB) &&
577 (drv->type_id != CX88_MPEG_BLACKBIRD))
578 return -EINVAL;
579
580 if ((drv->hw_access != CX8802_DRVCTL_SHARED) &&
581 (drv->hw_access != CX8802_DRVCTL_EXCLUSIVE))
582 return -EINVAL;
583
584 if ((!drv->probe) ||
585 (!drv->remove) ||
586 (!drv->advise_acquire) ||
587 (!drv->advise_release))
588 return -EINVAL;
589
590 return 0;
591 }
592
cx8802_register_driver(struct cx8802_driver * drv)593 int cx8802_register_driver(struct cx8802_driver *drv)
594 {
595 struct cx8802_dev *dev;
596 struct cx8802_driver *driver;
597 int err, i = 0;
598
599 pr_info("registering cx8802 driver, type: %s access: %s\n",
600 drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
601 drv->hw_access == CX8802_DRVCTL_SHARED ?
602 "shared" : "exclusive");
603
604 err = cx8802_check_driver(drv);
605 if (err) {
606 pr_err("cx8802_driver is invalid\n");
607 return err;
608 }
609
610 mutex_lock(&cx8802_mutex);
611
612 list_for_each_entry(dev, &cx8802_devlist, devlist) {
613 pr_info("subsystem: %04x:%04x, board: %s [card=%d]\n",
614 dev->pci->subsystem_vendor,
615 dev->pci->subsystem_device, dev->core->board.name,
616 dev->core->boardnr);
617
618 /* Bring up a new struct for each driver instance */
619 driver = kzalloc(sizeof(*drv), GFP_KERNEL);
620 if (!driver) {
621 err = -ENOMEM;
622 goto out;
623 }
624
625 /* Snapshot of the driver registration data */
626 drv->core = dev->core;
627 drv->suspend = cx8802_suspend_common;
628 drv->resume = cx8802_resume_common;
629 drv->request_acquire = cx8802_request_acquire;
630 drv->request_release = cx8802_request_release;
631 memcpy(driver, drv, sizeof(*driver));
632
633 mutex_lock(&drv->core->lock);
634 err = drv->probe(driver);
635 if (err == 0) {
636 i++;
637 list_add_tail(&driver->drvlist, &dev->drvlist);
638 } else {
639 pr_err("cx8802 probe failed, err = %d\n", err);
640 }
641 mutex_unlock(&drv->core->lock);
642 }
643
644 err = i ? 0 : -ENODEV;
645 out:
646 mutex_unlock(&cx8802_mutex);
647 return err;
648 }
649 EXPORT_SYMBOL(cx8802_register_driver);
650
cx8802_unregister_driver(struct cx8802_driver * drv)651 int cx8802_unregister_driver(struct cx8802_driver *drv)
652 {
653 struct cx8802_dev *dev;
654 struct cx8802_driver *d, *dtmp;
655 int err = 0;
656
657 pr_info("unregistering cx8802 driver, type: %s access: %s\n",
658 drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
659 drv->hw_access == CX8802_DRVCTL_SHARED ?
660 "shared" : "exclusive");
661
662 mutex_lock(&cx8802_mutex);
663
664 list_for_each_entry(dev, &cx8802_devlist, devlist) {
665 pr_info("subsystem: %04x:%04x, board: %s [card=%d]\n",
666 dev->pci->subsystem_vendor,
667 dev->pci->subsystem_device, dev->core->board.name,
668 dev->core->boardnr);
669
670 mutex_lock(&dev->core->lock);
671
672 list_for_each_entry_safe(d, dtmp, &dev->drvlist, drvlist) {
673 /* only unregister the correct driver type */
674 if (d->type_id != drv->type_id)
675 continue;
676
677 err = d->remove(d);
678 if (err == 0) {
679 list_del(&d->drvlist);
680 kfree(d);
681 } else
682 pr_err("cx8802 driver remove failed (%d)\n",
683 err);
684 }
685
686 mutex_unlock(&dev->core->lock);
687 }
688
689 mutex_unlock(&cx8802_mutex);
690
691 return err;
692 }
693 EXPORT_SYMBOL(cx8802_unregister_driver);
694
695 /* ----------------------------------------------------------- */
cx8802_probe(struct pci_dev * pci_dev,const struct pci_device_id * pci_id)696 static int cx8802_probe(struct pci_dev *pci_dev,
697 const struct pci_device_id *pci_id)
698 {
699 struct cx8802_dev *dev;
700 struct cx88_core *core;
701 int err;
702
703 /* general setup */
704 core = cx88_core_get(pci_dev);
705 if (!core)
706 return -EINVAL;
707
708 pr_info("cx2388x 8802 Driver Manager\n");
709
710 err = -ENODEV;
711 if (!core->board.mpeg)
712 goto fail_core;
713
714 err = -ENOMEM;
715 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
716 if (!dev)
717 goto fail_core;
718 dev->pci = pci_dev;
719 dev->core = core;
720
721 /* Maintain a reference so cx88-video can query the 8802 device. */
722 core->dvbdev = dev;
723
724 err = cx8802_init_common(dev);
725 if (err != 0)
726 goto fail_dev;
727
728 INIT_LIST_HEAD(&dev->drvlist);
729 mutex_lock(&cx8802_mutex);
730 list_add_tail(&dev->devlist, &cx8802_devlist);
731 mutex_unlock(&cx8802_mutex);
732
733 /* now autoload cx88-dvb or cx88-blackbird */
734 request_modules(dev);
735 return 0;
736
737 fail_dev:
738 kfree(dev);
739 fail_core:
740 core->dvbdev = NULL;
741 cx88_core_put(core, pci_dev);
742 return err;
743 }
744
cx8802_remove(struct pci_dev * pci_dev)745 static void cx8802_remove(struct pci_dev *pci_dev)
746 {
747 struct cx8802_dev *dev;
748
749 dev = pci_get_drvdata(pci_dev);
750
751 dprintk(1, "%s\n", __func__);
752
753 flush_request_modules(dev);
754
755 mutex_lock(&dev->core->lock);
756
757 if (!list_empty(&dev->drvlist)) {
758 struct cx8802_driver *drv, *tmp;
759 int err;
760
761 pr_warn("Trying to remove cx8802 driver while cx8802 sub-drivers still loaded?!\n");
762
763 list_for_each_entry_safe(drv, tmp, &dev->drvlist, drvlist) {
764 err = drv->remove(drv);
765 if (err == 0) {
766 list_del(&drv->drvlist);
767 } else
768 pr_err("cx8802 driver remove failed (%d)\n",
769 err);
770 kfree(drv);
771 }
772 }
773
774 mutex_unlock(&dev->core->lock);
775
776 /* Destroy any 8802 reference. */
777 dev->core->dvbdev = NULL;
778
779 /* common */
780 cx8802_fini_common(dev);
781 cx88_core_put(dev->core, dev->pci);
782 kfree(dev);
783 }
784
785 static const struct pci_device_id cx8802_pci_tbl[] = {
786 {
787 .vendor = 0x14f1,
788 .device = 0x8802,
789 .subvendor = PCI_ANY_ID,
790 .subdevice = PCI_ANY_ID,
791 }, {
792 /* --- end of list --- */
793 }
794 };
795 MODULE_DEVICE_TABLE(pci, cx8802_pci_tbl);
796
797 static struct pci_driver cx8802_pci_driver = {
798 .name = "cx88-mpeg driver manager",
799 .id_table = cx8802_pci_tbl,
800 .probe = cx8802_probe,
801 .remove = cx8802_remove,
802 };
803
804 module_pci_driver(cx8802_pci_driver);
805