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
24MODULE_DESCRIPTION("mpeg driver for cx2388x based TV cards");
25MODULE_AUTHOR("Jelle Foks <jelle@foks.us>");
26MODULE_AUTHOR("Chris Pascoe <c.pascoe@itee.uq.edu.au>");
27MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
28MODULE_LICENSE("GPL");
29MODULE_VERSION(CX88_VERSION);
30
31static unsigned int debug;
32module_param(debug, int, 0644);
33MODULE_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)
42static 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
53static 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
59static 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
68static LIST_HEAD(cx8802_devlist);
69static DEFINE_MUTEX(cx8802_mutex);
70/* ------------------------------------------------------------------ */
71
72int 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, ch: &cx88_sram_channels[SRAM_CH28],
83 bpl: dev->ts_packet_size, risc: 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 /* clear interrupt status register */
166 cx_write(MO_TS_INTSTAT, 0x1f1111);
167
168 /* enable irqs */
169 dprintk(1, "setting the interrupt mask\n");
170 cx_set(MO_PCI_INTMSK, core->pci_irqmask | PCI_INT_TSINT);
171 cx_set(MO_TS_INTMSK, 0x1f0011);
172
173 /* start dma */
174 cx_set(MO_DEV_CNTRL2, (1 << 5));
175 cx_set(MO_TS_DMACNTRL, 0x11);
176 return 0;
177}
178EXPORT_SYMBOL(cx8802_start_dma);
179
180static int cx8802_stop_dma(struct cx8802_dev *dev)
181{
182 struct cx88_core *core = dev->core;
183
184 dprintk(1, "\n");
185
186 /* stop dma */
187 cx_clear(MO_TS_DMACNTRL, 0x11);
188
189 /* disable irqs */
190 cx_clear(MO_PCI_INTMSK, PCI_INT_TSINT);
191 cx_clear(MO_TS_INTMSK, 0x1f0011);
192
193 /* Reset the controller */
194 cx_write(TS_GEN_CNTRL, 0xcd);
195 return 0;
196}
197
198static int cx8802_restart_queue(struct cx8802_dev *dev,
199 struct cx88_dmaqueue *q)
200{
201 struct cx88_buffer *buf;
202
203 dprintk(1, "\n");
204 if (list_empty(head: &q->active))
205 return 0;
206
207 buf = list_entry(q->active.next, struct cx88_buffer, list);
208 dprintk(2, "restart_queue [%p/%d]: restart dma\n",
209 buf, buf->vb.vb2_buf.index);
210 cx8802_start_dma(dev, q, buf);
211 return 0;
212}
213
214/* ------------------------------------------------------------------ */
215
216int cx8802_buf_prepare(struct vb2_queue *q, struct cx8802_dev *dev,
217 struct cx88_buffer *buf)
218{
219 int size = dev->ts_packet_size * dev->ts_packet_count;
220 struct sg_table *sgt = vb2_dma_sg_plane_desc(vb: &buf->vb.vb2_buf, plane_no: 0);
221 struct cx88_riscmem *risc = &buf->risc;
222 int rc;
223
224 if (vb2_plane_size(vb: &buf->vb.vb2_buf, plane_no: 0) < size)
225 return -EINVAL;
226 vb2_set_plane_payload(vb: &buf->vb.vb2_buf, plane_no: 0, size);
227
228 rc = cx88_risc_databuffer(pci: dev->pci, risc, sglist: sgt->sgl,
229 bpl: dev->ts_packet_size, lines: dev->ts_packet_count, lpi: 0);
230 if (rc) {
231 if (risc->cpu)
232 dma_free_coherent(dev: &dev->pci->dev, size: risc->size,
233 cpu_addr: risc->cpu, dma_handle: risc->dma);
234 memset(risc, 0, sizeof(*risc));
235 return rc;
236 }
237 return 0;
238}
239EXPORT_SYMBOL(cx8802_buf_prepare);
240
241void cx8802_buf_queue(struct cx8802_dev *dev, struct cx88_buffer *buf)
242{
243 struct cx88_buffer *prev;
244 struct cx88_dmaqueue *cx88q = &dev->mpegq;
245
246 dprintk(1, "\n");
247 /* add jump to start */
248 buf->risc.cpu[1] = cpu_to_le32(buf->risc.dma + 8);
249 buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_CNT_INC);
250 buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma + 8);
251
252 if (list_empty(head: &cx88q->active)) {
253 dprintk(1, "queue is empty - first active\n");
254 list_add_tail(new: &buf->list, head: &cx88q->active);
255 dprintk(1, "[%p/%d] %s - first active\n",
256 buf, buf->vb.vb2_buf.index, __func__);
257
258 } else {
259 buf->risc.cpu[0] |= cpu_to_le32(RISC_IRQ1);
260 dprintk(1, "queue is not empty - append to active\n");
261 prev = list_entry(cx88q->active.prev, struct cx88_buffer, list);
262 list_add_tail(new: &buf->list, head: &cx88q->active);
263 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
264 dprintk(1, "[%p/%d] %s - append to active\n",
265 buf, buf->vb.vb2_buf.index, __func__);
266 }
267}
268EXPORT_SYMBOL(cx8802_buf_queue);
269
270/* ----------------------------------------------------------- */
271
272static void do_cancel_buffers(struct cx8802_dev *dev)
273{
274 struct cx88_dmaqueue *q = &dev->mpegq;
275 struct cx88_buffer *buf;
276 unsigned long flags;
277
278 spin_lock_irqsave(&dev->slock, flags);
279 while (!list_empty(head: &q->active)) {
280 buf = list_entry(q->active.next, struct cx88_buffer, list);
281 list_del(entry: &buf->list);
282 vb2_buffer_done(vb: &buf->vb.vb2_buf, state: VB2_BUF_STATE_ERROR);
283 }
284 spin_unlock_irqrestore(lock: &dev->slock, flags);
285}
286
287void cx8802_cancel_buffers(struct cx8802_dev *dev)
288{
289 dprintk(1, "\n");
290 cx8802_stop_dma(dev);
291 do_cancel_buffers(dev);
292}
293EXPORT_SYMBOL(cx8802_cancel_buffers);
294
295static const char *cx88_mpeg_irqs[32] = {
296 "ts_risci1", NULL, NULL, NULL,
297 "ts_risci2", NULL, NULL, NULL,
298 "ts_oflow", NULL, NULL, NULL,
299 "ts_sync", NULL, NULL, NULL,
300 "opc_err", "par_err", "rip_err", "pci_abort",
301 "ts_err?",
302};
303
304static void cx8802_mpeg_irq(struct cx8802_dev *dev)
305{
306 struct cx88_core *core = dev->core;
307 u32 status, mask, count;
308
309 dprintk(1, "\n");
310 status = cx_read(MO_TS_INTSTAT);
311 mask = cx_read(MO_TS_INTMSK);
312 if (0 == (status & mask))
313 return;
314
315 cx_write(MO_TS_INTSTAT, status);
316
317 if (debug || (status & mask & ~0xff))
318 cx88_print_irqbits(tag: "irq mpeg ",
319 strings: cx88_mpeg_irqs, ARRAY_SIZE(cx88_mpeg_irqs),
320 bits: status, mask);
321
322 /* risc op code error */
323 if (status & (1 << 16)) {
324 pr_warn("mpeg risc op code error\n");
325 cx_clear(MO_TS_DMACNTRL, 0x11);
326 cx88_sram_channel_dump(core: dev->core,
327 ch: &cx88_sram_channels[SRAM_CH28]);
328 }
329
330 /* risc1 y */
331 if (status & 0x01) {
332 dprintk(1, "wake up\n");
333 spin_lock(lock: &dev->slock);
334 count = cx_read(MO_TS_GPCNT);
335 cx88_wakeup(core: dev->core, q: &dev->mpegq, count);
336 spin_unlock(lock: &dev->slock);
337 }
338
339 /* other general errors */
340 if (status & 0x1f0100) {
341 dprintk(0, "general errors: 0x%08x\n", status & 0x1f0100);
342 spin_lock(lock: &dev->slock);
343 cx8802_stop_dma(dev);
344 spin_unlock(lock: &dev->slock);
345 }
346}
347
348#define MAX_IRQ_LOOP 10
349
350static irqreturn_t cx8802_irq(int irq, void *dev_id)
351{
352 struct cx8802_dev *dev = dev_id;
353 struct cx88_core *core = dev->core;
354 u32 status;
355 int loop, handled = 0;
356
357 for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
358 status = cx_read(MO_PCI_INTSTAT) &
359 (core->pci_irqmask | PCI_INT_TSINT);
360 if (status == 0)
361 goto out;
362 dprintk(1, "cx8802_irq\n");
363 dprintk(1, " loop: %d/%d\n", loop, MAX_IRQ_LOOP);
364 dprintk(1, " status: %d\n", status);
365 handled = 1;
366 cx_write(MO_PCI_INTSTAT, status);
367
368 if (status & core->pci_irqmask)
369 cx88_core_irq(core, status);
370 if (status & PCI_INT_TSINT)
371 cx8802_mpeg_irq(dev);
372 }
373 if (loop == MAX_IRQ_LOOP) {
374 dprintk(0, "clearing mask\n");
375 pr_warn("irq loop -- clearing mask\n");
376 cx_write(MO_PCI_INTMSK, 0);
377 }
378
379 out:
380 return IRQ_RETVAL(handled);
381}
382
383static int cx8802_init_common(struct cx8802_dev *dev)
384{
385 struct cx88_core *core = dev->core;
386 int err;
387
388 /* pci init */
389 if (pci_enable_device(dev: dev->pci))
390 return -EIO;
391 pci_set_master(dev: dev->pci);
392 err = dma_set_mask(dev: &dev->pci->dev, DMA_BIT_MASK(32));
393 if (err) {
394 pr_err("Oops: no 32bit PCI DMA ???\n");
395 return -EIO;
396 }
397
398 dev->pci_rev = dev->pci->revision;
399 pci_read_config_byte(dev: dev->pci, PCI_LATENCY_TIMER, val: &dev->pci_lat);
400 pr_info("found at %s, rev: %d, irq: %d, latency: %d, mmio: 0x%llx\n",
401 pci_name(dev->pci), dev->pci_rev, dev->pci->irq,
402 dev->pci_lat,
403 (unsigned long long)pci_resource_start(dev->pci, 0));
404
405 /* initialize driver struct */
406 spin_lock_init(&dev->slock);
407
408 /* init dma queue */
409 INIT_LIST_HEAD(list: &dev->mpegq.active);
410
411 /* get irq */
412 err = request_irq(irq: dev->pci->irq, handler: cx8802_irq,
413 IRQF_SHARED, name: dev->core->name, dev);
414 if (err < 0) {
415 pr_err("can't get IRQ %d\n", dev->pci->irq);
416 return err;
417 }
418 cx_set(MO_PCI_INTMSK, core->pci_irqmask);
419
420 /* everything worked */
421 pci_set_drvdata(pdev: dev->pci, data: dev);
422 return 0;
423}
424
425static void cx8802_fini_common(struct cx8802_dev *dev)
426{
427 dprintk(2, "\n");
428 cx8802_stop_dma(dev);
429 pci_disable_device(dev: dev->pci);
430
431 /* unregister stuff */
432 free_irq(dev->pci->irq, dev);
433}
434
435/* ----------------------------------------------------------- */
436
437static int cx8802_suspend_common(struct pci_dev *pci_dev, pm_message_t state)
438{
439 struct cx8802_dev *dev = pci_get_drvdata(pdev: pci_dev);
440 unsigned long flags;
441
442 /* stop mpeg dma */
443 spin_lock_irqsave(&dev->slock, flags);
444 if (!list_empty(head: &dev->mpegq.active)) {
445 dprintk(2, "suspend\n");
446 pr_info("suspend mpeg\n");
447 cx8802_stop_dma(dev);
448 }
449 spin_unlock_irqrestore(lock: &dev->slock, flags);
450
451 /* FIXME -- shutdown device */
452 cx88_shutdown(core: dev->core);
453
454 pci_save_state(dev: pci_dev);
455 if (pci_set_power_state(dev: pci_dev,
456 state: pci_choose_state(dev: pci_dev, state)) != 0) {
457 pci_disable_device(dev: pci_dev);
458 dev->state.disabled = 1;
459 }
460 return 0;
461}
462
463static int cx8802_resume_common(struct pci_dev *pci_dev)
464{
465 struct cx8802_dev *dev = pci_get_drvdata(pdev: pci_dev);
466 unsigned long flags;
467 int err;
468
469 if (dev->state.disabled) {
470 err = pci_enable_device(dev: pci_dev);
471 if (err) {
472 pr_err("can't enable device\n");
473 return err;
474 }
475 dev->state.disabled = 0;
476 }
477 err = pci_set_power_state(dev: pci_dev, PCI_D0);
478 if (err) {
479 pr_err("can't enable device\n");
480 pci_disable_device(dev: pci_dev);
481 dev->state.disabled = 1;
482
483 return err;
484 }
485 pci_restore_state(dev: pci_dev);
486
487 /* FIXME: re-initialize hardware */
488 cx88_reset(core: dev->core);
489
490 /* restart video+vbi capture */
491 spin_lock_irqsave(&dev->slock, flags);
492 if (!list_empty(head: &dev->mpegq.active)) {
493 pr_info("resume mpeg\n");
494 cx8802_restart_queue(dev, q: &dev->mpegq);
495 }
496 spin_unlock_irqrestore(lock: &dev->slock, flags);
497
498 return 0;
499}
500
501struct cx8802_driver *cx8802_get_driver(struct cx8802_dev *dev,
502 enum cx88_board_type btype)
503{
504 struct cx8802_driver *d;
505
506 list_for_each_entry(d, &dev->drvlist, drvlist)
507 if (d->type_id == btype)
508 return d;
509
510 return NULL;
511}
512EXPORT_SYMBOL(cx8802_get_driver);
513
514/* Driver asked for hardware access. */
515static int cx8802_request_acquire(struct cx8802_driver *drv)
516{
517 struct cx88_core *core = drv->core;
518 unsigned int i;
519
520 /* Fail a request for hardware if the device is busy. */
521 if (core->active_type_id != CX88_BOARD_NONE &&
522 core->active_type_id != drv->type_id)
523 return -EBUSY;
524
525 if (drv->type_id == CX88_MPEG_DVB) {
526 /* When switching to DVB, always set the input to the tuner */
527 core->last_analog_input = core->input;
528 core->input = 0;
529 for (i = 0;
530 i < ARRAY_SIZE(core->board.input);
531 i++) {
532 if (core->board.input[i].type == CX88_VMUX_DVB) {
533 core->input = i;
534 break;
535 }
536 }
537 }
538
539 if (drv->advise_acquire) {
540 core->active_ref++;
541 if (core->active_type_id == CX88_BOARD_NONE) {
542 core->active_type_id = drv->type_id;
543 drv->advise_acquire(drv);
544 }
545
546 dprintk(1, "Post acquire GPIO=%x\n", cx_read(MO_GP0_IO));
547 }
548
549 return 0;
550}
551
552/* Driver asked to release hardware. */
553static int cx8802_request_release(struct cx8802_driver *drv)
554{
555 struct cx88_core *core = drv->core;
556
557 if (drv->advise_release && --core->active_ref == 0) {
558 if (drv->type_id == CX88_MPEG_DVB) {
559 /*
560 * If the DVB driver is releasing, reset the input
561 * state to the last configured analog input
562 */
563 core->input = core->last_analog_input;
564 }
565
566 drv->advise_release(drv);
567 core->active_type_id = CX88_BOARD_NONE;
568 dprintk(1, "Post release GPIO=%x\n", cx_read(MO_GP0_IO));
569 }
570
571 return 0;
572}
573
574static int cx8802_check_driver(struct cx8802_driver *drv)
575{
576 if (!drv)
577 return -ENODEV;
578
579 if ((drv->type_id != CX88_MPEG_DVB) &&
580 (drv->type_id != CX88_MPEG_BLACKBIRD))
581 return -EINVAL;
582
583 if ((drv->hw_access != CX8802_DRVCTL_SHARED) &&
584 (drv->hw_access != CX8802_DRVCTL_EXCLUSIVE))
585 return -EINVAL;
586
587 if ((!drv->probe) ||
588 (!drv->remove) ||
589 (!drv->advise_acquire) ||
590 (!drv->advise_release))
591 return -EINVAL;
592
593 return 0;
594}
595
596int cx8802_register_driver(struct cx8802_driver *drv)
597{
598 struct cx8802_dev *dev;
599 struct cx8802_driver *driver;
600 int err, i = 0;
601
602 pr_info("registering cx8802 driver, type: %s access: %s\n",
603 drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
604 drv->hw_access == CX8802_DRVCTL_SHARED ?
605 "shared" : "exclusive");
606
607 err = cx8802_check_driver(drv);
608 if (err) {
609 pr_err("cx8802_driver is invalid\n");
610 return err;
611 }
612
613 mutex_lock(&cx8802_mutex);
614
615 list_for_each_entry(dev, &cx8802_devlist, devlist) {
616 pr_info("subsystem: %04x:%04x, board: %s [card=%d]\n",
617 dev->pci->subsystem_vendor,
618 dev->pci->subsystem_device, dev->core->board.name,
619 dev->core->boardnr);
620
621 /* Bring up a new struct for each driver instance */
622 driver = kzalloc(size: sizeof(*drv), GFP_KERNEL);
623 if (!driver) {
624 err = -ENOMEM;
625 goto out;
626 }
627
628 /* Snapshot of the driver registration data */
629 drv->core = dev->core;
630 drv->suspend = cx8802_suspend_common;
631 drv->resume = cx8802_resume_common;
632 drv->request_acquire = cx8802_request_acquire;
633 drv->request_release = cx8802_request_release;
634 memcpy(driver, drv, sizeof(*driver));
635
636 mutex_lock(&drv->core->lock);
637 err = drv->probe(driver);
638 if (err == 0) {
639 i++;
640 list_add_tail(new: &driver->drvlist, head: &dev->drvlist);
641 } else {
642 pr_err("cx8802 probe failed, err = %d\n", err);
643 }
644 mutex_unlock(lock: &drv->core->lock);
645 }
646
647 err = i ? 0 : -ENODEV;
648out:
649 mutex_unlock(lock: &cx8802_mutex);
650 return err;
651}
652EXPORT_SYMBOL(cx8802_register_driver);
653
654int cx8802_unregister_driver(struct cx8802_driver *drv)
655{
656 struct cx8802_dev *dev;
657 struct cx8802_driver *d, *dtmp;
658 int err = 0;
659
660 pr_info("unregistering cx8802 driver, type: %s access: %s\n",
661 drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
662 drv->hw_access == CX8802_DRVCTL_SHARED ?
663 "shared" : "exclusive");
664
665 mutex_lock(&cx8802_mutex);
666
667 list_for_each_entry(dev, &cx8802_devlist, devlist) {
668 pr_info("subsystem: %04x:%04x, board: %s [card=%d]\n",
669 dev->pci->subsystem_vendor,
670 dev->pci->subsystem_device, dev->core->board.name,
671 dev->core->boardnr);
672
673 mutex_lock(&dev->core->lock);
674
675 list_for_each_entry_safe(d, dtmp, &dev->drvlist, drvlist) {
676 /* only unregister the correct driver type */
677 if (d->type_id != drv->type_id)
678 continue;
679
680 err = d->remove(d);
681 if (err == 0) {
682 list_del(entry: &d->drvlist);
683 kfree(objp: d);
684 } else
685 pr_err("cx8802 driver remove failed (%d)\n",
686 err);
687 }
688
689 mutex_unlock(lock: &dev->core->lock);
690 }
691
692 mutex_unlock(lock: &cx8802_mutex);
693
694 return err;
695}
696EXPORT_SYMBOL(cx8802_unregister_driver);
697
698/* ----------------------------------------------------------- */
699static int cx8802_probe(struct pci_dev *pci_dev,
700 const struct pci_device_id *pci_id)
701{
702 struct cx8802_dev *dev;
703 struct cx88_core *core;
704 int err;
705
706 /* general setup */
707 core = cx88_core_get(pci: pci_dev);
708 if (!core)
709 return -EINVAL;
710
711 pr_info("cx2388x 8802 Driver Manager\n");
712
713 err = -ENODEV;
714 if (!core->board.mpeg)
715 goto fail_core;
716
717 err = -ENOMEM;
718 dev = kzalloc(size: sizeof(*dev), GFP_KERNEL);
719 if (!dev)
720 goto fail_core;
721 dev->pci = pci_dev;
722 dev->core = core;
723
724 /* Maintain a reference so cx88-video can query the 8802 device. */
725 core->dvbdev = dev;
726
727 err = cx8802_init_common(dev);
728 if (err != 0)
729 goto fail_dev;
730
731 INIT_LIST_HEAD(list: &dev->drvlist);
732 mutex_lock(&cx8802_mutex);
733 list_add_tail(new: &dev->devlist, head: &cx8802_devlist);
734 mutex_unlock(lock: &cx8802_mutex);
735
736 /* now autoload cx88-dvb or cx88-blackbird */
737 request_modules(dev);
738 return 0;
739
740 fail_dev:
741 kfree(objp: dev);
742 fail_core:
743 core->dvbdev = NULL;
744 cx88_core_put(core, pci: pci_dev);
745 return err;
746}
747
748static void cx8802_remove(struct pci_dev *pci_dev)
749{
750 struct cx8802_dev *dev;
751
752 dev = pci_get_drvdata(pdev: pci_dev);
753
754 dprintk(1, "%s\n", __func__);
755
756 flush_request_modules(dev);
757
758 mutex_lock(&dev->core->lock);
759
760 if (!list_empty(head: &dev->drvlist)) {
761 struct cx8802_driver *drv, *tmp;
762 int err;
763
764 pr_warn("Trying to remove cx8802 driver while cx8802 sub-drivers still loaded?!\n");
765
766 list_for_each_entry_safe(drv, tmp, &dev->drvlist, drvlist) {
767 err = drv->remove(drv);
768 if (err == 0) {
769 list_del(entry: &drv->drvlist);
770 } else
771 pr_err("cx8802 driver remove failed (%d)\n",
772 err);
773 kfree(objp: drv);
774 }
775 }
776
777 mutex_unlock(lock: &dev->core->lock);
778
779 /* Destroy any 8802 reference. */
780 dev->core->dvbdev = NULL;
781
782 /* common */
783 cx8802_fini_common(dev);
784 cx88_core_put(core: dev->core, pci: dev->pci);
785 kfree(objp: dev);
786}
787
788static const struct pci_device_id cx8802_pci_tbl[] = {
789 {
790 .vendor = 0x14f1,
791 .device = 0x8802,
792 .subvendor = PCI_ANY_ID,
793 .subdevice = PCI_ANY_ID,
794 }, {
795 /* --- end of list --- */
796 }
797};
798MODULE_DEVICE_TABLE(pci, cx8802_pci_tbl);
799
800static struct pci_driver cx8802_pci_driver = {
801 .name = "cx88-mpeg driver manager",
802 .id_table = cx8802_pci_tbl,
803 .probe = cx8802_probe,
804 .remove = cx8802_remove,
805};
806
807module_pci_driver(cx8802_pci_driver);
808

source code of linux/drivers/media/pci/cx88/cx88-mpeg.c