Version:  2.0.40 2.2.26 2.4.37 3.13 3.14 3.15 3.16 3.17 3.18 3.19 4.0 4.1 4.2 4.3 4.4 4.5 4.6 4.7 4.8 4.9 4.10

Linux/drivers/media/pci/cx88/cx88-mpeg.c

  1 /*
  2  *
  3  *  Support for the mpeg transport stream transfers
  4  *  PCI function #2 of the cx2388x.
  5  *
  6  *    (c) 2004 Jelle Foks <jelle@foks.us>
  7  *    (c) 2004 Chris Pascoe <c.pascoe@itee.uq.edu.au>
  8  *    (c) 2004 Gerd Knorr <kraxel@bytesex.org>
  9  *
 10  *  This program is free software; you can redistribute it and/or modify
 11  *  it under the terms of the GNU General Public License as published by
 12  *  the Free Software Foundation; either version 2 of the License, or
 13  *  (at your option) any later version.
 14  *
 15  *  This program is distributed in the hope that it will be useful,
 16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 18  *  GNU General Public License for more details.
 19  */
 20 
 21 #include "cx88.h"
 22 
 23 #include <linux/module.h>
 24 #include <linux/slab.h>
 25 #include <linux/init.h>
 26 #include <linux/device.h>
 27 #include <linux/dma-mapping.h>
 28 #include <linux/interrupt.h>
 29 #include <linux/delay.h>
 30 
 31 /* ------------------------------------------------------------------ */
 32 
 33 MODULE_DESCRIPTION("mpeg driver for cx2388x based TV cards");
 34 MODULE_AUTHOR("Jelle Foks <jelle@foks.us>");
 35 MODULE_AUTHOR("Chris Pascoe <c.pascoe@itee.uq.edu.au>");
 36 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
 37 MODULE_LICENSE("GPL");
 38 MODULE_VERSION(CX88_VERSION);
 39 
 40 static unsigned int debug;
 41 module_param(debug, int, 0644);
 42 MODULE_PARM_DESC(debug, "enable debug messages [mpeg]");
 43 
 44 #define dprintk(level, fmt, arg...) do {                                \
 45         if (debug + 1 > level)                                          \
 46                 printk(KERN_DEBUG pr_fmt("%s: mpeg:" fmt),              \
 47                         __func__, ##arg);                               \
 48 } while (0)
 49 
 50 #if defined(CONFIG_MODULES) && defined(MODULE)
 51 static void request_module_async(struct work_struct *work)
 52 {
 53         struct cx8802_dev *dev = container_of(work, struct cx8802_dev,
 54                                               request_module_wk);
 55 
 56         if (dev->core->board.mpeg & CX88_MPEG_DVB)
 57                 request_module("cx88-dvb");
 58         if (dev->core->board.mpeg & CX88_MPEG_BLACKBIRD)
 59                 request_module("cx88-blackbird");
 60 }
 61 
 62 static void request_modules(struct cx8802_dev *dev)
 63 {
 64         INIT_WORK(&dev->request_module_wk, request_module_async);
 65         schedule_work(&dev->request_module_wk);
 66 }
 67 
 68 static void flush_request_modules(struct cx8802_dev *dev)
 69 {
 70         flush_work(&dev->request_module_wk);
 71 }
 72 #else
 73 #define request_modules(dev)
 74 #define flush_request_modules(dev)
 75 #endif /* CONFIG_MODULES */
 76 
 77 static LIST_HEAD(cx8802_devlist);
 78 static DEFINE_MUTEX(cx8802_mutex);
 79 /* ------------------------------------------------------------------ */
 80 
 81 int cx8802_start_dma(struct cx8802_dev    *dev,
 82                      struct cx88_dmaqueue *q,
 83                      struct cx88_buffer   *buf)
 84 {
 85         struct cx88_core *core = dev->core;
 86 
 87         dprintk(1, "w: %d, h: %d, f: %d\n",
 88                 core->width, core->height, core->field);
 89 
 90         /* setup fifo + format */
 91         cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH28],
 92                                 dev->ts_packet_size, buf->risc.dma);
 93 
 94         /* write TS length to chip */
 95         cx_write(MO_TS_LNGTH, dev->ts_packet_size);
 96 
 97         /*
 98          * FIXME: this needs a review.
 99          * also: move to cx88-blackbird + cx88-dvb source files?
100          */
101 
102         dprintk(1, "core->active_type_id = 0x%08x\n", core->active_type_id);
103 
104         if ((core->active_type_id == CX88_MPEG_DVB) &&
105             (core->board.mpeg & CX88_MPEG_DVB)) {
106                 dprintk(1, "cx8802_start_dma doing .dvb\n");
107                 /* negedge driven & software reset */
108                 cx_write(TS_GEN_CNTRL, 0x0040 | dev->ts_gen_cntrl);
109                 udelay(100);
110                 cx_write(MO_PINMUX_IO, 0x00);
111                 cx_write(TS_HW_SOP_CNTRL, 0x47 << 16 | 188 << 4 | 0x01);
112                 switch (core->boardnr) {
113                 case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_Q:
114                 case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_T:
115                 case CX88_BOARD_DVICO_FUSIONHDTV_5_GOLD:
116                 case CX88_BOARD_PCHDTV_HD5500:
117                         cx_write(TS_SOP_STAT, 1 << 13);
118                         break;
119                 case CX88_BOARD_SAMSUNG_SMT_7020:
120                         cx_write(TS_SOP_STAT, 0x00);
121                         break;
122                 case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
123                 case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
124                         /* Enable MPEG parallel IO and video signal pins */
125                         cx_write(MO_PINMUX_IO, 0x88);
126                         udelay(100);
127                         break;
128                 case CX88_BOARD_HAUPPAUGE_HVR1300:
129                         /* Enable MPEG parallel IO and video signal pins */
130                         cx_write(MO_PINMUX_IO, 0x88);
131                         cx_write(TS_SOP_STAT, 0);
132                         cx_write(TS_VALERR_CNTRL, 0);
133                         break;
134                 case CX88_BOARD_PINNACLE_PCTV_HD_800i:
135                         /* Enable MPEG parallel IO and video signal pins */
136                         cx_write(MO_PINMUX_IO, 0x88);
137                         cx_write(TS_HW_SOP_CNTRL, (0x47 << 16) | (188 << 4));
138                         dev->ts_gen_cntrl = 5;
139                         cx_write(TS_SOP_STAT, 0);
140                         cx_write(TS_VALERR_CNTRL, 0);
141                         udelay(100);
142                         break;
143                 default:
144                         cx_write(TS_SOP_STAT, 0x00);
145                         break;
146                 }
147                 cx_write(TS_GEN_CNTRL, dev->ts_gen_cntrl);
148                 udelay(100);
149         } else if ((core->active_type_id == CX88_MPEG_BLACKBIRD) &&
150                 (core->board.mpeg & CX88_MPEG_BLACKBIRD)) {
151                 dprintk(1, "cx8802_start_dma doing .blackbird\n");
152                 cx_write(MO_PINMUX_IO, 0x88); /* enable MPEG parallel IO */
153 
154                 /* punctured clock TS & posedge driven & software reset */
155                 cx_write(TS_GEN_CNTRL, 0x46);
156                 udelay(100);
157 
158                 cx_write(TS_HW_SOP_CNTRL, 0x408); /* mpeg start byte */
159                 cx_write(TS_VALERR_CNTRL, 0x2000);
160 
161                 /* punctured clock TS & posedge driven */
162                 cx_write(TS_GEN_CNTRL, 0x06);
163                 udelay(100);
164         } else {
165                 pr_err("%s() Failed. Unsupported value in .mpeg (0x%08x)\n",
166                        __func__, core->board.mpeg);
167                 return -EINVAL;
168         }
169 
170         /* reset counter */
171         cx_write(MO_TS_GPCNTRL, GP_COUNT_CONTROL_RESET);
172         q->count = 0;
173 
174         /* enable irqs */
175         dprintk(1, "setting the interrupt mask\n");
176         cx_set(MO_PCI_INTMSK, core->pci_irqmask | PCI_INT_TSINT);
177         cx_set(MO_TS_INTMSK,  0x1f0011);
178 
179         /* start dma */
180         cx_set(MO_DEV_CNTRL2, (1 << 5));
181         cx_set(MO_TS_DMACNTRL, 0x11);
182         return 0;
183 }
184 EXPORT_SYMBOL(cx8802_start_dma);
185 
186 static int cx8802_stop_dma(struct cx8802_dev *dev)
187 {
188         struct cx88_core *core = dev->core;
189 
190         dprintk(1, "\n");
191 
192         /* stop dma */
193         cx_clear(MO_TS_DMACNTRL, 0x11);
194 
195         /* disable irqs */
196         cx_clear(MO_PCI_INTMSK, PCI_INT_TSINT);
197         cx_clear(MO_TS_INTMSK, 0x1f0011);
198 
199         /* Reset the controller */
200         cx_write(TS_GEN_CNTRL, 0xcd);
201         return 0;
202 }
203 
204 static int cx8802_restart_queue(struct cx8802_dev    *dev,
205                                 struct cx88_dmaqueue *q)
206 {
207         struct cx88_buffer *buf;
208 
209         dprintk(1, "\n");
210         if (list_empty(&q->active))
211                 return 0;
212 
213         buf = list_entry(q->active.next, struct cx88_buffer, list);
214         dprintk(2, "restart_queue [%p/%d]: restart dma\n",
215                 buf, buf->vb.vb2_buf.index);
216         cx8802_start_dma(dev, q, buf);
217         return 0;
218 }
219 
220 /* ------------------------------------------------------------------ */
221 
222 int cx8802_buf_prepare(struct vb2_queue *q, struct cx8802_dev *dev,
223                        struct cx88_buffer *buf)
224 {
225         int size = dev->ts_packet_size * dev->ts_packet_count;
226         struct sg_table *sgt = vb2_dma_sg_plane_desc(&buf->vb.vb2_buf, 0);
227         struct cx88_riscmem *risc = &buf->risc;
228         int rc;
229 
230         if (vb2_plane_size(&buf->vb.vb2_buf, 0) < size)
231                 return -EINVAL;
232         vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size);
233 
234         rc = cx88_risc_databuffer(dev->pci, risc, sgt->sgl,
235                                   dev->ts_packet_size, dev->ts_packet_count, 0);
236         if (rc) {
237                 if (risc->cpu)
238                         pci_free_consistent(dev->pci, risc->size,
239                                             risc->cpu, risc->dma);
240                 memset(risc, 0, sizeof(*risc));
241                 return rc;
242         }
243         return 0;
244 }
245 EXPORT_SYMBOL(cx8802_buf_prepare);
246 
247 void cx8802_buf_queue(struct cx8802_dev *dev, struct cx88_buffer *buf)
248 {
249         struct cx88_buffer    *prev;
250         struct cx88_dmaqueue  *cx88q = &dev->mpegq;
251 
252         dprintk(1, "\n");
253         /* add jump to start */
254         buf->risc.cpu[1] = cpu_to_le32(buf->risc.dma + 8);
255         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_CNT_INC);
256         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma + 8);
257 
258         if (list_empty(&cx88q->active)) {
259                 dprintk(1, "queue is empty - first active\n");
260                 list_add_tail(&buf->list, &cx88q->active);
261                 dprintk(1, "[%p/%d] %s - first active\n",
262                         buf, buf->vb.vb2_buf.index, __func__);
263 
264         } else {
265                 buf->risc.cpu[0] |= cpu_to_le32(RISC_IRQ1);
266                 dprintk(1, "queue is not empty - append to active\n");
267                 prev = list_entry(cx88q->active.prev, struct cx88_buffer, list);
268                 list_add_tail(&buf->list, &cx88q->active);
269                 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
270                 dprintk(1, "[%p/%d] %s - append to active\n",
271                         buf, buf->vb.vb2_buf.index, __func__);
272         }
273 }
274 EXPORT_SYMBOL(cx8802_buf_queue);
275 
276 /* ----------------------------------------------------------- */
277 
278 static void do_cancel_buffers(struct cx8802_dev *dev)
279 {
280         struct cx88_dmaqueue *q = &dev->mpegq;
281         struct cx88_buffer *buf;
282         unsigned long flags;
283 
284         spin_lock_irqsave(&dev->slock, flags);
285         while (!list_empty(&q->active)) {
286                 buf = list_entry(q->active.next, struct cx88_buffer, list);
287                 list_del(&buf->list);
288                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
289         }
290         spin_unlock_irqrestore(&dev->slock, flags);
291 }
292 
293 void cx8802_cancel_buffers(struct cx8802_dev *dev)
294 {
295         dprintk(1, "\n");
296         cx8802_stop_dma(dev);
297         do_cancel_buffers(dev);
298 }
299 EXPORT_SYMBOL(cx8802_cancel_buffers);
300 
301 static const char *cx88_mpeg_irqs[32] = {
302         "ts_risci1", NULL, NULL, NULL,
303         "ts_risci2", NULL, NULL, NULL,
304         "ts_oflow",  NULL, NULL, NULL,
305         "ts_sync",   NULL, NULL, NULL,
306         "opc_err", "par_err", "rip_err", "pci_abort",
307         "ts_err?",
308 };
309 
310 static void cx8802_mpeg_irq(struct cx8802_dev *dev)
311 {
312         struct cx88_core *core = dev->core;
313         u32 status, mask, count;
314 
315         dprintk(1, "\n");
316         status = cx_read(MO_TS_INTSTAT);
317         mask   = cx_read(MO_TS_INTMSK);
318         if (0 == (status & mask))
319                 return;
320 
321         cx_write(MO_TS_INTSTAT, status);
322 
323         if (debug || (status & mask & ~0xff))
324                 cx88_print_irqbits("irq mpeg ",
325                                    cx88_mpeg_irqs, ARRAY_SIZE(cx88_mpeg_irqs),
326                                    status, mask);
327 
328         /* risc op code error */
329         if (status & (1 << 16)) {
330                 pr_warn("mpeg risc op code error\n");
331                 cx_clear(MO_TS_DMACNTRL, 0x11);
332                 cx88_sram_channel_dump(dev->core,
333                                        &cx88_sram_channels[SRAM_CH28]);
334         }
335 
336         /* risc1 y */
337         if (status & 0x01) {
338                 dprintk(1, "wake up\n");
339                 spin_lock(&dev->slock);
340                 count = cx_read(MO_TS_GPCNT);
341                 cx88_wakeup(dev->core, &dev->mpegq, count);
342                 spin_unlock(&dev->slock);
343         }
344 
345         /* other general errors */
346         if (status & 0x1f0100) {
347                 dprintk(0, "general errors: 0x%08x\n", status & 0x1f0100);
348                 spin_lock(&dev->slock);
349                 cx8802_stop_dma(dev);
350                 spin_unlock(&dev->slock);
351         }
352 }
353 
354 #define MAX_IRQ_LOOP 10
355 
356 static irqreturn_t cx8802_irq(int irq, void *dev_id)
357 {
358         struct cx8802_dev *dev = dev_id;
359         struct cx88_core *core = dev->core;
360         u32 status;
361         int loop, handled = 0;
362 
363         for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
364                 status = cx_read(MO_PCI_INTSTAT) &
365                         (core->pci_irqmask | PCI_INT_TSINT);
366                 if (status == 0)
367                         goto out;
368                 dprintk(1, "cx8802_irq\n");
369                 dprintk(1, "    loop: %d/%d\n", loop, MAX_IRQ_LOOP);
370                 dprintk(1, "    status: %d\n", status);
371                 handled = 1;
372                 cx_write(MO_PCI_INTSTAT, status);
373 
374                 if (status & core->pci_irqmask)
375                         cx88_core_irq(core, status);
376                 if (status & PCI_INT_TSINT)
377                         cx8802_mpeg_irq(dev);
378         }
379         if (loop == MAX_IRQ_LOOP) {
380                 dprintk(0, "clearing mask\n");
381                 pr_warn("irq loop -- clearing mask\n");
382                 cx_write(MO_PCI_INTMSK, 0);
383         }
384 
385  out:
386         return IRQ_RETVAL(handled);
387 }
388 
389 static int cx8802_init_common(struct cx8802_dev *dev)
390 {
391         struct cx88_core *core = dev->core;
392         int err;
393 
394         /* pci init */
395         if (pci_enable_device(dev->pci))
396                 return -EIO;
397         pci_set_master(dev->pci);
398         err = pci_set_dma_mask(dev->pci, DMA_BIT_MASK(32));
399         if (err) {
400                 pr_err("Oops: no 32bit PCI DMA ???\n");
401                 return -EIO;
402         }
403 
404         dev->pci_rev = dev->pci->revision;
405         pci_read_config_byte(dev->pci, PCI_LATENCY_TIMER,  &dev->pci_lat);
406         pr_info("found at %s, rev: %d, irq: %d, latency: %d, mmio: 0x%llx\n",
407                 pci_name(dev->pci), dev->pci_rev, dev->pci->irq,
408                 dev->pci_lat,
409                 (unsigned long long)pci_resource_start(dev->pci, 0));
410 
411         /* initialize driver struct */
412         spin_lock_init(&dev->slock);
413 
414         /* init dma queue */
415         INIT_LIST_HEAD(&dev->mpegq.active);
416 
417         /* get irq */
418         err = request_irq(dev->pci->irq, cx8802_irq,
419                           IRQF_SHARED, dev->core->name, dev);
420         if (err < 0) {
421                 pr_err("can't get IRQ %d\n", dev->pci->irq);
422                 return err;
423         }
424         cx_set(MO_PCI_INTMSK, core->pci_irqmask);
425 
426         /* everything worked */
427         pci_set_drvdata(dev->pci, dev);
428         return 0;
429 }
430 
431 static void cx8802_fini_common(struct cx8802_dev *dev)
432 {
433         dprintk(2, "\n");
434         cx8802_stop_dma(dev);
435         pci_disable_device(dev->pci);
436 
437         /* unregister stuff */
438         free_irq(dev->pci->irq, dev);
439 }
440 
441 /* ----------------------------------------------------------- */
442 
443 static int cx8802_suspend_common(struct pci_dev *pci_dev, pm_message_t state)
444 {
445         struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
446         unsigned long flags;
447 
448         /* stop mpeg dma */
449         spin_lock_irqsave(&dev->slock, flags);
450         if (!list_empty(&dev->mpegq.active)) {
451                 dprintk(2, "suspend\n");
452                 pr_info("suspend mpeg\n");
453                 cx8802_stop_dma(dev);
454         }
455         spin_unlock_irqrestore(&dev->slock, flags);
456 
457         /* FIXME -- shutdown device */
458         cx88_shutdown(dev->core);
459 
460         pci_save_state(pci_dev);
461         if (pci_set_power_state(pci_dev,
462                                 pci_choose_state(pci_dev, state)) != 0) {
463                 pci_disable_device(pci_dev);
464                 dev->state.disabled = 1;
465         }
466         return 0;
467 }
468 
469 static int cx8802_resume_common(struct pci_dev *pci_dev)
470 {
471         struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
472         unsigned long flags;
473         int err;
474 
475         if (dev->state.disabled) {
476                 err = pci_enable_device(pci_dev);
477                 if (err) {
478                         pr_err("can't enable device\n");
479                         return err;
480                 }
481                 dev->state.disabled = 0;
482         }
483         err = pci_set_power_state(pci_dev, PCI_D0);
484         if (err) {
485                 pr_err("can't enable device\n");
486                 pci_disable_device(pci_dev);
487                 dev->state.disabled = 1;
488 
489                 return err;
490         }
491         pci_restore_state(pci_dev);
492 
493         /* FIXME: re-initialize hardware */
494         cx88_reset(dev->core);
495 
496         /* restart video+vbi capture */
497         spin_lock_irqsave(&dev->slock, flags);
498         if (!list_empty(&dev->mpegq.active)) {
499                 pr_info("resume mpeg\n");
500                 cx8802_restart_queue(dev, &dev->mpegq);
501         }
502         spin_unlock_irqrestore(&dev->slock, flags);
503 
504         return 0;
505 }
506 
507 struct cx8802_driver *cx8802_get_driver(struct cx8802_dev *dev,
508                                         enum cx88_board_type btype)
509 {
510         struct cx8802_driver *d;
511 
512         list_for_each_entry(d, &dev->drvlist, drvlist)
513                 if (d->type_id == btype)
514                         return d;
515 
516         return NULL;
517 }
518 EXPORT_SYMBOL(cx8802_get_driver);
519 
520 /* Driver asked for hardware access. */
521 static int cx8802_request_acquire(struct cx8802_driver *drv)
522 {
523         struct cx88_core *core = drv->core;
524         unsigned int    i;
525 
526         /* Fail a request for hardware if the device is busy. */
527         if (core->active_type_id != CX88_BOARD_NONE &&
528             core->active_type_id != drv->type_id)
529                 return -EBUSY;
530 
531         if (drv->type_id == CX88_MPEG_DVB) {
532                 /* When switching to DVB, always set the input to the tuner */
533                 core->last_analog_input = core->input;
534                 core->input = 0;
535                 for (i = 0;
536                      i < (sizeof(core->board.input) /
537                           sizeof(struct cx88_input));
538                      i++) {
539                         if (core->board.input[i].type == CX88_VMUX_DVB) {
540                                 core->input = i;
541                                 break;
542                         }
543                 }
544         }
545 
546         if (drv->advise_acquire) {
547                 core->active_ref++;
548                 if (core->active_type_id == CX88_BOARD_NONE) {
549                         core->active_type_id = drv->type_id;
550                         drv->advise_acquire(drv);
551                 }
552 
553                 dprintk(1, "Post acquire GPIO=%x\n", cx_read(MO_GP0_IO));
554         }
555 
556         return 0;
557 }
558 
559 /* Driver asked to release hardware. */
560 static int cx8802_request_release(struct cx8802_driver *drv)
561 {
562         struct cx88_core *core = drv->core;
563 
564         if (drv->advise_release && --core->active_ref == 0) {
565                 if (drv->type_id == CX88_MPEG_DVB) {
566                         /*
567                          * If the DVB driver is releasing, reset the input
568                          * state to the last configured analog input
569                          */
570                         core->input = core->last_analog_input;
571                 }
572 
573                 drv->advise_release(drv);
574                 core->active_type_id = CX88_BOARD_NONE;
575                 dprintk(1, "Post release GPIO=%x\n", cx_read(MO_GP0_IO));
576         }
577 
578         return 0;
579 }
580 
581 static int cx8802_check_driver(struct cx8802_driver *drv)
582 {
583         if (!drv)
584                 return -ENODEV;
585 
586         if ((drv->type_id != CX88_MPEG_DVB) &&
587             (drv->type_id != CX88_MPEG_BLACKBIRD))
588                 return -EINVAL;
589 
590         if ((drv->hw_access != CX8802_DRVCTL_SHARED) &&
591             (drv->hw_access != CX8802_DRVCTL_EXCLUSIVE))
592                 return -EINVAL;
593 
594         if ((!drv->probe) ||
595             (!drv->remove) ||
596             (!drv->advise_acquire) ||
597             (!drv->advise_release))
598                 return -EINVAL;
599 
600         return 0;
601 }
602 
603 int cx8802_register_driver(struct cx8802_driver *drv)
604 {
605         struct cx8802_dev *dev;
606         struct cx8802_driver *driver;
607         int err, i = 0;
608 
609         pr_info("registering cx8802 driver, type: %s access: %s\n",
610                 drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
611                 drv->hw_access == CX8802_DRVCTL_SHARED ?
612                                   "shared" : "exclusive");
613 
614         err = cx8802_check_driver(drv);
615         if (err) {
616                 pr_err("cx8802_driver is invalid\n");
617                 return err;
618         }
619 
620         mutex_lock(&cx8802_mutex);
621 
622         list_for_each_entry(dev, &cx8802_devlist, devlist) {
623                 pr_info("subsystem: %04x:%04x, board: %s [card=%d]\n",
624                         dev->pci->subsystem_vendor,
625                         dev->pci->subsystem_device, dev->core->board.name,
626                         dev->core->boardnr);
627 
628                 /* Bring up a new struct for each driver instance */
629                 driver = kzalloc(sizeof(*drv), GFP_KERNEL);
630                 if (!driver) {
631                         err = -ENOMEM;
632                         goto out;
633                 }
634 
635                 /* Snapshot of the driver registration data */
636                 drv->core = dev->core;
637                 drv->suspend = cx8802_suspend_common;
638                 drv->resume = cx8802_resume_common;
639                 drv->request_acquire = cx8802_request_acquire;
640                 drv->request_release = cx8802_request_release;
641                 memcpy(driver, drv, sizeof(*driver));
642 
643                 mutex_lock(&drv->core->lock);
644                 err = drv->probe(driver);
645                 if (err == 0) {
646                         i++;
647                         list_add_tail(&driver->drvlist, &dev->drvlist);
648                 } else {
649                         pr_err("cx8802 probe failed, err = %d\n", err);
650                 }
651                 mutex_unlock(&drv->core->lock);
652         }
653 
654         err = i ? 0 : -ENODEV;
655 out:
656         mutex_unlock(&cx8802_mutex);
657         return err;
658 }
659 EXPORT_SYMBOL(cx8802_register_driver);
660 
661 int cx8802_unregister_driver(struct cx8802_driver *drv)
662 {
663         struct cx8802_dev *dev;
664         struct cx8802_driver *d, *dtmp;
665         int err = 0;
666 
667         pr_info("unregistering cx8802 driver, type: %s access: %s\n",
668                 drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
669                 drv->hw_access == CX8802_DRVCTL_SHARED ?
670                                   "shared" : "exclusive");
671 
672         mutex_lock(&cx8802_mutex);
673 
674         list_for_each_entry(dev, &cx8802_devlist, devlist) {
675                 pr_info("subsystem: %04x:%04x, board: %s [card=%d]\n",
676                         dev->pci->subsystem_vendor,
677                         dev->pci->subsystem_device, dev->core->board.name,
678                         dev->core->boardnr);
679 
680                 mutex_lock(&dev->core->lock);
681 
682                 list_for_each_entry_safe(d, dtmp, &dev->drvlist, drvlist) {
683                         /* only unregister the correct driver type */
684                         if (d->type_id != drv->type_id)
685                                 continue;
686 
687                         err = d->remove(d);
688                         if (err == 0) {
689                                 list_del(&d->drvlist);
690                                 kfree(d);
691                         } else
692                                 pr_err("cx8802 driver remove failed (%d)\n",
693                                        err);
694                 }
695 
696                 mutex_unlock(&dev->core->lock);
697         }
698 
699         mutex_unlock(&cx8802_mutex);
700 
701         return err;
702 }
703 EXPORT_SYMBOL(cx8802_unregister_driver);
704 
705 /* ----------------------------------------------------------- */
706 static int cx8802_probe(struct pci_dev *pci_dev,
707                         const struct pci_device_id *pci_id)
708 {
709         struct cx8802_dev *dev;
710         struct cx88_core  *core;
711         int err;
712 
713         /* general setup */
714         core = cx88_core_get(pci_dev);
715         if (!core)
716                 return -EINVAL;
717 
718         pr_info("cx2388x 8802 Driver Manager\n");
719 
720         err = -ENODEV;
721         if (!core->board.mpeg)
722                 goto fail_core;
723 
724         err = -ENOMEM;
725         dev = kzalloc(sizeof(*dev), GFP_KERNEL);
726         if (!dev)
727                 goto fail_core;
728         dev->pci = pci_dev;
729         dev->core = core;
730 
731         /* Maintain a reference so cx88-video can query the 8802 device. */
732         core->dvbdev = dev;
733 
734         err = cx8802_init_common(dev);
735         if (err != 0)
736                 goto fail_dev;
737 
738         INIT_LIST_HEAD(&dev->drvlist);
739         mutex_lock(&cx8802_mutex);
740         list_add_tail(&dev->devlist, &cx8802_devlist);
741         mutex_unlock(&cx8802_mutex);
742 
743         /* now autoload cx88-dvb or cx88-blackbird */
744         request_modules(dev);
745         return 0;
746 
747  fail_dev:
748         kfree(dev);
749  fail_core:
750         core->dvbdev = NULL;
751         cx88_core_put(core, pci_dev);
752         return err;
753 }
754 
755 static void cx8802_remove(struct pci_dev *pci_dev)
756 {
757         struct cx8802_dev *dev;
758 
759         dev = pci_get_drvdata(pci_dev);
760 
761         dprintk(1, "%s\n", __func__);
762 
763         flush_request_modules(dev);
764 
765         mutex_lock(&dev->core->lock);
766 
767         if (!list_empty(&dev->drvlist)) {
768                 struct cx8802_driver *drv, *tmp;
769                 int err;
770 
771                 pr_warn("Trying to remove cx8802 driver while cx8802 sub-drivers still loaded?!\n");
772 
773                 list_for_each_entry_safe(drv, tmp, &dev->drvlist, drvlist) {
774                         err = drv->remove(drv);
775                         if (err == 0) {
776                                 list_del(&drv->drvlist);
777                         } else
778                                 pr_err("cx8802 driver remove failed (%d)\n",
779                                        err);
780                         kfree(drv);
781                 }
782         }
783 
784         mutex_unlock(&dev->core->lock);
785 
786         /* Destroy any 8802 reference. */
787         dev->core->dvbdev = NULL;
788 
789         /* common */
790         cx8802_fini_common(dev);
791         cx88_core_put(dev->core, dev->pci);
792         kfree(dev);
793 }
794 
795 static const struct pci_device_id cx8802_pci_tbl[] = {
796         {
797                 .vendor       = 0x14f1,
798                 .device       = 0x8802,
799                 .subvendor    = PCI_ANY_ID,
800                 .subdevice    = PCI_ANY_ID,
801         }, {
802                 /* --- end of list --- */
803         }
804 };
805 MODULE_DEVICE_TABLE(pci, cx8802_pci_tbl);
806 
807 static struct pci_driver cx8802_pci_driver = {
808         .name     = "cx88-mpeg driver manager",
809         .id_table = cx8802_pci_tbl,
810         .probe    = cx8802_probe,
811         .remove   = cx8802_remove,
812 };
813 
814 module_pci_driver(cx8802_pci_driver);
815 

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