Version:  2.0.40 2.2.26 2.4.37 3.9 3.10 3.11 3.12 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

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  *  You should have received a copy of the GNU General Public License
 21  *  along with this program; if not, write to the Free Software
 22  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 23  */
 24 
 25 #include <linux/module.h>
 26 #include <linux/slab.h>
 27 #include <linux/init.h>
 28 #include <linux/device.h>
 29 #include <linux/dma-mapping.h>
 30 #include <linux/interrupt.h>
 31 #include <asm/delay.h>
 32 
 33 #include "cx88.h"
 34 
 35 /* ------------------------------------------------------------------ */
 36 
 37 MODULE_DESCRIPTION("mpeg driver for cx2388x based TV cards");
 38 MODULE_AUTHOR("Jelle Foks <jelle@foks.us>");
 39 MODULE_AUTHOR("Chris Pascoe <c.pascoe@itee.uq.edu.au>");
 40 MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
 41 MODULE_LICENSE("GPL");
 42 MODULE_VERSION(CX88_VERSION);
 43 
 44 static unsigned int debug;
 45 module_param(debug,int,0644);
 46 MODULE_PARM_DESC(debug,"enable debug messages [mpeg]");
 47 
 48 #define dprintk(level, fmt, arg...) do {                                       \
 49         if (debug + 1 > level)                                                 \
 50                 printk(KERN_DEBUG "%s/2-mpeg: " fmt, dev->core->name, ## arg); \
 51 } while(0)
 52 
 53 #define mpeg_dbg(level, fmt, arg...) do {                                 \
 54         if (debug + 1 > level)                                            \
 55                 printk(KERN_DEBUG "%s/2-mpeg: " fmt, core->name, ## arg); \
 56 } while(0)
 57 
 58 #if defined(CONFIG_MODULES) && defined(MODULE)
 59 static void request_module_async(struct work_struct *work)
 60 {
 61         struct cx8802_dev *dev=container_of(work, struct cx8802_dev, request_module_wk);
 62 
 63         if (dev->core->board.mpeg & CX88_MPEG_DVB)
 64                 request_module("cx88-dvb");
 65         if (dev->core->board.mpeg & CX88_MPEG_BLACKBIRD)
 66                 request_module("cx88-blackbird");
 67 }
 68 
 69 static void request_modules(struct cx8802_dev *dev)
 70 {
 71         INIT_WORK(&dev->request_module_wk, request_module_async);
 72         schedule_work(&dev->request_module_wk);
 73 }
 74 
 75 static void flush_request_modules(struct cx8802_dev *dev)
 76 {
 77         flush_work(&dev->request_module_wk);
 78 }
 79 #else
 80 #define request_modules(dev)
 81 #define flush_request_modules(dev)
 82 #endif /* CONFIG_MODULES */
 83 
 84 
 85 static LIST_HEAD(cx8802_devlist);
 86 static DEFINE_MUTEX(cx8802_mutex);
 87 /* ------------------------------------------------------------------ */
 88 
 89 int cx8802_start_dma(struct cx8802_dev    *dev,
 90                             struct cx88_dmaqueue *q,
 91                             struct cx88_buffer   *buf)
 92 {
 93         struct cx88_core *core = dev->core;
 94 
 95         dprintk(1, "cx8802_start_dma w: %d, h: %d, f: %d\n",
 96                 core->width, core->height, core->field);
 97 
 98         /* setup fifo + format */
 99         cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH28],
100                                 dev->ts_packet_size, buf->risc.dma);
101 
102         /* write TS length to chip */
103         cx_write(MO_TS_LNGTH, dev->ts_packet_size);
104 
105         /* FIXME: this needs a review.
106          * also: move to cx88-blackbird + cx88-dvb source files? */
107 
108         dprintk( 1, "core->active_type_id = 0x%08x\n", core->active_type_id);
109 
110         if ( (core->active_type_id == CX88_MPEG_DVB) &&
111                 (core->board.mpeg & CX88_MPEG_DVB) ) {
112 
113                 dprintk( 1, "cx8802_start_dma doing .dvb\n");
114                 /* negedge driven & software reset */
115                 cx_write(TS_GEN_CNTRL, 0x0040 | dev->ts_gen_cntrl);
116                 udelay(100);
117                 cx_write(MO_PINMUX_IO, 0x00);
118                 cx_write(TS_HW_SOP_CNTRL, 0x47<<16|188<<4|0x01);
119                 switch (core->boardnr) {
120                 case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_Q:
121                 case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_T:
122                 case CX88_BOARD_DVICO_FUSIONHDTV_5_GOLD:
123                 case CX88_BOARD_PCHDTV_HD5500:
124                         cx_write(TS_SOP_STAT, 1<<13);
125                         break;
126                 case CX88_BOARD_SAMSUNG_SMT_7020:
127                         cx_write(TS_SOP_STAT, 0x00);
128                         break;
129                 case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
130                 case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
131                         cx_write(MO_PINMUX_IO, 0x88); /* Enable MPEG parallel IO and video signal pins */
132                         udelay(100);
133                         break;
134                 case CX88_BOARD_HAUPPAUGE_HVR1300:
135                         /* Enable MPEG parallel IO and video signal pins */
136                         cx_write(MO_PINMUX_IO, 0x88);
137                         cx_write(TS_SOP_STAT, 0);
138                         cx_write(TS_VALERR_CNTRL, 0);
139                         break;
140                 case CX88_BOARD_PINNACLE_PCTV_HD_800i:
141                         /* Enable MPEG parallel IO and video signal pins */
142                         cx_write(MO_PINMUX_IO, 0x88);
143                         cx_write(TS_HW_SOP_CNTRL, (0x47 << 16) | (188 << 4));
144                         dev->ts_gen_cntrl = 5;
145                         cx_write(TS_SOP_STAT, 0);
146                         cx_write(TS_VALERR_CNTRL, 0);
147                         udelay(100);
148                         break;
149                 default:
150                         cx_write(TS_SOP_STAT, 0x00);
151                         break;
152                 }
153                 cx_write(TS_GEN_CNTRL, dev->ts_gen_cntrl);
154                 udelay(100);
155         } else if ( (core->active_type_id == CX88_MPEG_BLACKBIRD) &&
156                 (core->board.mpeg & CX88_MPEG_BLACKBIRD) ) {
157                 dprintk( 1, "cx8802_start_dma doing .blackbird\n");
158                 cx_write(MO_PINMUX_IO, 0x88); /* enable MPEG parallel IO */
159 
160                 cx_write(TS_GEN_CNTRL, 0x46); /* punctured clock TS & posedge driven & software reset */
161                 udelay(100);
162 
163                 cx_write(TS_HW_SOP_CNTRL, 0x408); /* mpeg start byte */
164                 cx_write(TS_VALERR_CNTRL, 0x2000);
165 
166                 cx_write(TS_GEN_CNTRL, 0x06); /* punctured clock TS & posedge driven */
167                 udelay(100);
168         } else {
169                 printk( "%s() Failed. Unsupported value in .mpeg (0x%08x)\n", __func__,
170                         core->board.mpeg );
171                 return -EINVAL;
172         }
173 
174         /* reset counter */
175         cx_write(MO_TS_GPCNTRL, GP_COUNT_CONTROL_RESET);
176         q->count = 0;
177 
178         /* enable irqs */
179         dprintk( 1, "setting the interrupt mask\n" );
180         cx_set(MO_PCI_INTMSK, core->pci_irqmask | PCI_INT_TSINT);
181         cx_set(MO_TS_INTMSK,  0x1f0011);
182 
183         /* start dma */
184         cx_set(MO_DEV_CNTRL2, (1<<5));
185         cx_set(MO_TS_DMACNTRL, 0x11);
186         return 0;
187 }
188 
189 static int cx8802_stop_dma(struct cx8802_dev *dev)
190 {
191         struct cx88_core *core = dev->core;
192         dprintk( 1, "cx8802_stop_dma\n" );
193 
194         /* stop dma */
195         cx_clear(MO_TS_DMACNTRL, 0x11);
196 
197         /* disable irqs */
198         cx_clear(MO_PCI_INTMSK, PCI_INT_TSINT);
199         cx_clear(MO_TS_INTMSK, 0x1f0011);
200 
201         /* Reset the controller */
202         cx_write(TS_GEN_CNTRL, 0xcd);
203         return 0;
204 }
205 
206 static int cx8802_restart_queue(struct cx8802_dev    *dev,
207                                 struct cx88_dmaqueue *q)
208 {
209         struct cx88_buffer *buf;
210 
211         dprintk( 1, "cx8802_restart_queue\n" );
212         if (list_empty(&q->active))
213                 return 0;
214 
215         buf = list_entry(q->active.next, struct cx88_buffer, list);
216         dprintk(2,"restart_queue [%p/%d]: restart dma\n",
217                 buf, buf->vb.vb2_buf.index);
218         cx8802_start_dma(dev, q, buf);
219         return 0;
220 }
221 
222 /* ------------------------------------------------------------------ */
223 
224 int cx8802_buf_prepare(struct vb2_queue *q, struct cx8802_dev *dev,
225                         struct cx88_buffer *buf)
226 {
227         int size = dev->ts_packet_size * dev->ts_packet_count;
228         struct sg_table *sgt = vb2_dma_sg_plane_desc(&buf->vb.vb2_buf, 0);
229         struct cx88_riscmem *risc = &buf->risc;
230         int rc;
231 
232         if (vb2_plane_size(&buf->vb.vb2_buf, 0) < size)
233                 return -EINVAL;
234         vb2_set_plane_payload(&buf->vb.vb2_buf, 0, size);
235 
236         rc = cx88_risc_databuffer(dev->pci, risc, sgt->sgl,
237                              dev->ts_packet_size, dev->ts_packet_count, 0);
238         if (rc) {
239                 if (risc->cpu)
240                         pci_free_consistent(dev->pci, risc->size, risc->cpu, risc->dma);
241                 memset(risc, 0, sizeof(*risc));
242                 return rc;
243         }
244         return 0;
245 }
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, "cx8802_buf_queue\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 
275 /* ----------------------------------------------------------- */
276 
277 static void do_cancel_buffers(struct cx8802_dev *dev)
278 {
279         struct cx88_dmaqueue *q = &dev->mpegq;
280         struct cx88_buffer *buf;
281         unsigned long flags;
282 
283         spin_lock_irqsave(&dev->slock,flags);
284         while (!list_empty(&q->active)) {
285                 buf = list_entry(q->active.next, struct cx88_buffer, list);
286                 list_del(&buf->list);
287                 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
288         }
289         spin_unlock_irqrestore(&dev->slock,flags);
290 }
291 
292 void cx8802_cancel_buffers(struct cx8802_dev *dev)
293 {
294         dprintk( 1, "cx8802_cancel_buffers" );
295         cx8802_stop_dma(dev);
296         do_cancel_buffers(dev);
297 }
298 
299 static const char * cx88_mpeg_irqs[32] = {
300         "ts_risci1", NULL, NULL, NULL,
301         "ts_risci2", NULL, NULL, NULL,
302         "ts_oflow",  NULL, NULL, NULL,
303         "ts_sync",   NULL, NULL, NULL,
304         "opc_err", "par_err", "rip_err", "pci_abort",
305         "ts_err?",
306 };
307 
308 static void cx8802_mpeg_irq(struct cx8802_dev *dev)
309 {
310         struct cx88_core *core = dev->core;
311         u32 status, mask, count;
312 
313         dprintk( 1, "cx8802_mpeg_irq\n" );
314         status = cx_read(MO_TS_INTSTAT);
315         mask   = cx_read(MO_TS_INTMSK);
316         if (0 == (status & mask))
317                 return;
318 
319         cx_write(MO_TS_INTSTAT, status);
320 
321         if (debug || (status & mask & ~0xff))
322                 cx88_print_irqbits(core->name, "irq mpeg ",
323                                    cx88_mpeg_irqs, ARRAY_SIZE(cx88_mpeg_irqs),
324                                    status, mask);
325 
326         /* risc op code error */
327         if (status & (1 << 16)) {
328                 printk(KERN_WARNING "%s: mpeg risc op code error\n",core->name);
329                 cx_clear(MO_TS_DMACNTRL, 0x11);
330                 cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH28]);
331         }
332 
333         /* risc1 y */
334         if (status & 0x01) {
335                 dprintk( 1, "wake up\n" );
336                 spin_lock(&dev->slock);
337                 count = cx_read(MO_TS_GPCNT);
338                 cx88_wakeup(dev->core, &dev->mpegq, count);
339                 spin_unlock(&dev->slock);
340         }
341 
342         /* other general errors */
343         if (status & 0x1f0100) {
344                 dprintk( 0, "general errors: 0x%08x\n", status & 0x1f0100 );
345                 spin_lock(&dev->slock);
346                 cx8802_stop_dma(dev);
347                 spin_unlock(&dev->slock);
348         }
349 }
350 
351 #define MAX_IRQ_LOOP 10
352 
353 static irqreturn_t cx8802_irq(int irq, void *dev_id)
354 {
355         struct cx8802_dev *dev = dev_id;
356         struct cx88_core *core = dev->core;
357         u32 status;
358         int loop, handled = 0;
359 
360         for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
361                 status = cx_read(MO_PCI_INTSTAT) &
362                         (core->pci_irqmask | PCI_INT_TSINT);
363                 if (0 == status)
364                         goto out;
365                 dprintk( 1, "cx8802_irq\n" );
366                 dprintk( 1, "    loop: %d/%d\n", loop, MAX_IRQ_LOOP );
367                 dprintk( 1, "    status: %d\n", status );
368                 handled = 1;
369                 cx_write(MO_PCI_INTSTAT, status);
370 
371                 if (status & core->pci_irqmask)
372                         cx88_core_irq(core,status);
373                 if (status & PCI_INT_TSINT)
374                         cx8802_mpeg_irq(dev);
375         }
376         if (MAX_IRQ_LOOP == loop) {
377                 dprintk( 0, "clearing mask\n" );
378                 printk(KERN_WARNING "%s/0: irq loop -- clearing mask\n",
379                        core->name);
380                 cx_write(MO_PCI_INTMSK,0);
381         }
382 
383  out:
384         return IRQ_RETVAL(handled);
385 }
386 
387 static int cx8802_init_common(struct cx8802_dev *dev)
388 {
389         struct cx88_core *core = dev->core;
390         int err;
391 
392         /* pci init */
393         if (pci_enable_device(dev->pci))
394                 return -EIO;
395         pci_set_master(dev->pci);
396         err = pci_set_dma_mask(dev->pci,DMA_BIT_MASK(32));
397         if (err) {
398                 printk("%s/2: Oops: no 32bit PCI DMA ???\n",dev->core->name);
399                 return -EIO;
400         }
401 
402         dev->pci_rev = dev->pci->revision;
403         pci_read_config_byte(dev->pci, PCI_LATENCY_TIMER,  &dev->pci_lat);
404         printk(KERN_INFO "%s/2: found at %s, rev: %d, irq: %d, "
405                "latency: %d, mmio: 0x%llx\n", dev->core->name,
406                pci_name(dev->pci), dev->pci_rev, dev->pci->irq,
407                dev->pci_lat,(unsigned long long)pci_resource_start(dev->pci,0));
408 
409         /* initialize driver struct */
410         spin_lock_init(&dev->slock);
411 
412         /* init dma queue */
413         INIT_LIST_HEAD(&dev->mpegq.active);
414 
415         /* get irq */
416         err = request_irq(dev->pci->irq, cx8802_irq,
417                           IRQF_SHARED, dev->core->name, dev);
418         if (err < 0) {
419                 printk(KERN_ERR "%s: can't get IRQ %d\n",
420                        dev->core->name, dev->pci->irq);
421                 return err;
422         }
423         cx_set(MO_PCI_INTMSK, core->pci_irqmask);
424 
425         /* everything worked */
426         pci_set_drvdata(dev->pci,dev);
427         return 0;
428 }
429 
430 static void cx8802_fini_common(struct cx8802_dev *dev)
431 {
432         dprintk( 2, "cx8802_fini_common\n" );
433         cx8802_stop_dma(dev);
434         pci_disable_device(dev->pci);
435 
436         /* unregister stuff */
437         free_irq(dev->pci->irq, dev);
438 }
439 
440 /* ----------------------------------------------------------- */
441 
442 static int cx8802_suspend_common(struct pci_dev *pci_dev, pm_message_t state)
443 {
444         struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
445         struct cx88_core *core = dev->core;
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                 printk("%s: suspend mpeg\n", core->name);
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 (0 != pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state))) {
462                 pci_disable_device(pci_dev);
463                 dev->state.disabled = 1;
464         }
465         return 0;
466 }
467 
468 static int cx8802_resume_common(struct pci_dev *pci_dev)
469 {
470         struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
471         struct cx88_core *core = dev->core;
472         unsigned long flags;
473         int err;
474 
475         if (dev->state.disabled) {
476                 err=pci_enable_device(pci_dev);
477                 if (err) {
478                         printk(KERN_ERR "%s: can't enable device\n",
479                                                dev->core->name);
480                         return err;
481                 }
482                 dev->state.disabled = 0;
483         }
484         err=pci_set_power_state(pci_dev, PCI_D0);
485         if (err) {
486                 printk(KERN_ERR "%s: can't enable device\n",
487                                                dev->core->name);
488                 pci_disable_device(pci_dev);
489                 dev->state.disabled = 1;
490 
491                 return err;
492         }
493         pci_restore_state(pci_dev);
494 
495         /* FIXME: re-initialize hardware */
496         cx88_reset(dev->core);
497 
498         /* restart video+vbi capture */
499         spin_lock_irqsave(&dev->slock, flags);
500         if (!list_empty(&dev->mpegq.active)) {
501                 printk("%s: resume mpeg\n", core->name);
502                 cx8802_restart_queue(dev,&dev->mpegq);
503         }
504         spin_unlock_irqrestore(&dev->slock, flags);
505 
506         return 0;
507 }
508 
509 struct cx8802_driver * cx8802_get_driver(struct cx8802_dev *dev, enum cx88_board_type btype)
510 {
511         struct cx8802_driver *d;
512 
513         list_for_each_entry(d, &dev->drvlist, drvlist)
514                 if (d->type_id == btype)
515                         return d;
516 
517         return NULL;
518 }
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) / sizeof(struct cx88_input));
537                      i++) {
538                         if (core->board.input[i].type == CX88_VMUX_DVB) {
539                                 core->input = i;
540                                 break;
541                         }
542                 }
543         }
544 
545         if (drv->advise_acquire)
546         {
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                 mpeg_dbg(1,"%s() Post acquire GPIO=%x\n", __func__, 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         {
566                 if (drv->type_id == CX88_MPEG_DVB) {
567                         /* If the DVB driver is releasing, reset the input
568                            state to the last configured analog input */
569                         core->input = core->last_analog_input;
570                 }
571 
572                 drv->advise_release(drv);
573                 core->active_type_id = CX88_BOARD_NONE;
574                 mpeg_dbg(1,"%s() Post release GPIO=%x\n", __func__, cx_read(MO_GP0_IO));
575         }
576 
577         return 0;
578 }
579 
580 static int cx8802_check_driver(struct cx8802_driver *drv)
581 {
582         if (drv == NULL)
583                 return -ENODEV;
584 
585         if ((drv->type_id != CX88_MPEG_DVB) &&
586                 (drv->type_id != CX88_MPEG_BLACKBIRD))
587                 return -EINVAL;
588 
589         if ((drv->hw_access != CX8802_DRVCTL_SHARED) &&
590                 (drv->hw_access != CX8802_DRVCTL_EXCLUSIVE))
591                 return -EINVAL;
592 
593         if ((drv->probe == NULL) ||
594                 (drv->remove == NULL) ||
595                 (drv->advise_acquire == NULL) ||
596                 (drv->advise_release == NULL))
597                 return -EINVAL;
598 
599         return 0;
600 }
601 
602 int cx8802_register_driver(struct cx8802_driver *drv)
603 {
604         struct cx8802_dev *dev;
605         struct cx8802_driver *driver;
606         int err, i = 0;
607 
608         printk(KERN_INFO
609                "cx88/2: registering cx8802 driver, type: %s access: %s\n",
610                drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
611                drv->hw_access == CX8802_DRVCTL_SHARED ? "shared" : "exclusive");
612 
613         if ((err = cx8802_check_driver(drv)) != 0) {
614                 printk(KERN_ERR "cx88/2: cx8802_driver is invalid\n");
615                 return err;
616         }
617 
618         mutex_lock(&cx8802_mutex);
619 
620         list_for_each_entry(dev, &cx8802_devlist, devlist) {
621                 printk(KERN_INFO
622                        "%s/2: subsystem: %04x:%04x, board: %s [card=%d]\n",
623                        dev->core->name, dev->pci->subsystem_vendor,
624                        dev->pci->subsystem_device, dev->core->board.name,
625                        dev->core->boardnr);
626 
627                 /* Bring up a new struct for each driver instance */
628                 driver = kzalloc(sizeof(*drv),GFP_KERNEL);
629                 if (driver == NULL) {
630                         err = -ENOMEM;
631                         goto out;
632                 }
633 
634                 /* Snapshot of the driver registration data */
635                 drv->core = dev->core;
636                 drv->suspend = cx8802_suspend_common;
637                 drv->resume = cx8802_resume_common;
638                 drv->request_acquire = cx8802_request_acquire;
639                 drv->request_release = cx8802_request_release;
640                 memcpy(driver, drv, sizeof(*driver));
641 
642                 mutex_lock(&drv->core->lock);
643                 err = drv->probe(driver);
644                 if (err == 0) {
645                         i++;
646                         list_add_tail(&driver->drvlist, &dev->drvlist);
647                 } else {
648                         printk(KERN_ERR
649                                "%s/2: cx8802 probe failed, err = %d\n",
650                                dev->core->name, err);
651                 }
652                 mutex_unlock(&drv->core->lock);
653         }
654 
655         err = i ? 0 : -ENODEV;
656 out:
657         mutex_unlock(&cx8802_mutex);
658         return err;
659 }
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         printk(KERN_INFO
668                "cx88/2: unregistering cx8802 driver, type: %s access: %s\n",
669                drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
670                drv->hw_access == CX8802_DRVCTL_SHARED ? "shared" : "exclusive");
671 
672         mutex_lock(&cx8802_mutex);
673 
674         list_for_each_entry(dev, &cx8802_devlist, devlist) {
675                 printk(KERN_INFO
676                        "%s/2: subsystem: %04x:%04x, board: %s [card=%d]\n",
677                        dev->core->name, dev->pci->subsystem_vendor,
678                        dev->pci->subsystem_device, dev->core->board.name,
679                        dev->core->boardnr);
680 
681                 mutex_lock(&dev->core->lock);
682 
683                 list_for_each_entry_safe(d, dtmp, &dev->drvlist, drvlist) {
684                         /* only unregister the correct driver type */
685                         if (d->type_id != drv->type_id)
686                                 continue;
687 
688                         err = d->remove(d);
689                         if (err == 0) {
690                                 list_del(&d->drvlist);
691                                 kfree(d);
692                         } else
693                                 printk(KERN_ERR "%s/2: cx8802 driver remove "
694                                        "failed (%d)\n", dev->core->name, err);
695                 }
696 
697                 mutex_unlock(&dev->core->lock);
698         }
699 
700         mutex_unlock(&cx8802_mutex);
701 
702         return err;
703 }
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 (NULL == core)
716                 return -EINVAL;
717 
718         printk("%s/2: cx2388x 8802 Driver Manager\n", core->name);
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 (NULL == dev)
727                 goto fail_core;
728         dev->pci = pci_dev;
729         dev->alloc_ctx = vb2_dma_sg_init_ctx(&pci_dev->dev);
730         if (IS_ERR(dev->alloc_ctx)) {
731                 err = PTR_ERR(dev->alloc_ctx);
732                 goto fail_dev;
733         }
734         dev->core = core;
735 
736         /* Maintain a reference so cx88-video can query the 8802 device. */
737         core->dvbdev = dev;
738 
739         err = cx8802_init_common(dev);
740         if (err != 0)
741                 goto fail_free;
742 
743         INIT_LIST_HEAD(&dev->drvlist);
744         mutex_lock(&cx8802_mutex);
745         list_add_tail(&dev->devlist,&cx8802_devlist);
746         mutex_unlock(&cx8802_mutex);
747 
748         /* now autoload cx88-dvb or cx88-blackbird */
749         request_modules(dev);
750         return 0;
751 
752  fail_free:
753         vb2_dma_sg_cleanup_ctx(dev->alloc_ctx);
754  fail_dev:
755         kfree(dev);
756  fail_core:
757         core->dvbdev = NULL;
758         cx88_core_put(core,pci_dev);
759         return err;
760 }
761 
762 static void cx8802_remove(struct pci_dev *pci_dev)
763 {
764         struct cx8802_dev *dev;
765 
766         dev = pci_get_drvdata(pci_dev);
767 
768         dprintk( 1, "%s\n", __func__);
769 
770         flush_request_modules(dev);
771 
772         mutex_lock(&dev->core->lock);
773 
774         if (!list_empty(&dev->drvlist)) {
775                 struct cx8802_driver *drv, *tmp;
776                 int err;
777 
778                 printk(KERN_WARNING "%s/2: Trying to remove cx8802 driver "
779                        "while cx8802 sub-drivers still loaded?!\n",
780                        dev->core->name);
781 
782                 list_for_each_entry_safe(drv, tmp, &dev->drvlist, drvlist) {
783                         err = drv->remove(drv);
784                         if (err == 0) {
785                                 list_del(&drv->drvlist);
786                         } else
787                                 printk(KERN_ERR "%s/2: cx8802 driver remove "
788                                        "failed (%d)\n", dev->core->name, err);
789                         kfree(drv);
790                 }
791         }
792 
793         mutex_unlock(&dev->core->lock);
794 
795         /* Destroy any 8802 reference. */
796         dev->core->dvbdev = NULL;
797 
798         /* common */
799         cx8802_fini_common(dev);
800         cx88_core_put(dev->core,dev->pci);
801         vb2_dma_sg_cleanup_ctx(dev->alloc_ctx);
802         kfree(dev);
803 }
804 
805 static const struct pci_device_id cx8802_pci_tbl[] = {
806         {
807                 .vendor       = 0x14f1,
808                 .device       = 0x8802,
809                 .subvendor    = PCI_ANY_ID,
810                 .subdevice    = PCI_ANY_ID,
811         },{
812                 /* --- end of list --- */
813         }
814 };
815 MODULE_DEVICE_TABLE(pci, cx8802_pci_tbl);
816 
817 static struct pci_driver cx8802_pci_driver = {
818         .name     = "cx88-mpeg driver manager",
819         .id_table = cx8802_pci_tbl,
820         .probe    = cx8802_probe,
821         .remove   = cx8802_remove,
822 };
823 
824 module_pci_driver(cx8802_pci_driver);
825 
826 EXPORT_SYMBOL(cx8802_buf_prepare);
827 EXPORT_SYMBOL(cx8802_buf_queue);
828 EXPORT_SYMBOL(cx8802_cancel_buffers);
829 EXPORT_SYMBOL(cx8802_start_dma);
830 
831 EXPORT_SYMBOL(cx8802_register_driver);
832 EXPORT_SYMBOL(cx8802_unregister_driver);
833 EXPORT_SYMBOL(cx8802_get_driver);
834 

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