Version:  2.0.40 2.2.26 2.4.37 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18 3.19

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 = 1;
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.v4l2_buf.index);
218         cx8802_start_dma(dev, q, buf);
219         list_for_each_entry(buf, &q->active, list)
220                 buf->count = q->count++;
221         return 0;
222 }
223 
224 /* ------------------------------------------------------------------ */
225 
226 int cx8802_buf_prepare(struct vb2_queue *q, struct cx8802_dev *dev,
227                         struct cx88_buffer *buf)
228 {
229         int size = dev->ts_packet_size * dev->ts_packet_count;
230         struct sg_table *sgt = vb2_dma_sg_plane_desc(&buf->vb, 0);
231         struct cx88_riscmem *risc = &buf->risc;
232         int rc;
233 
234         if (vb2_plane_size(&buf->vb, 0) < size)
235                 return -EINVAL;
236         vb2_set_plane_payload(&buf->vb, 0, size);
237 
238         rc = cx88_risc_databuffer(dev->pci, risc, sgt->sgl,
239                              dev->ts_packet_size, dev->ts_packet_count, 0);
240         if (rc) {
241                 if (risc->cpu)
242                         pci_free_consistent(dev->pci, risc->size, risc->cpu, risc->dma);
243                 memset(risc, 0, sizeof(*risc));
244                 return rc;
245         }
246         return 0;
247 }
248 
249 void cx8802_buf_queue(struct cx8802_dev *dev, struct cx88_buffer *buf)
250 {
251         struct cx88_buffer    *prev;
252         struct cx88_dmaqueue  *cx88q = &dev->mpegq;
253 
254         dprintk( 1, "cx8802_buf_queue\n" );
255         /* add jump to start */
256         buf->risc.cpu[1] = cpu_to_le32(buf->risc.dma + 8);
257         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_CNT_INC);
258         buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma + 8);
259 
260         if (list_empty(&cx88q->active)) {
261                 dprintk( 1, "queue is empty - first active\n" );
262                 list_add_tail(&buf->list, &cx88q->active);
263                 buf->count    = cx88q->count++;
264                 dprintk(1,"[%p/%d] %s - first active\n",
265                         buf, buf->vb.v4l2_buf.index, __func__);
266 
267         } else {
268                 buf->risc.cpu[0] |= cpu_to_le32(RISC_IRQ1);
269                 dprintk( 1, "queue is not empty - append to active\n" );
270                 prev = list_entry(cx88q->active.prev, struct cx88_buffer, list);
271                 list_add_tail(&buf->list, &cx88q->active);
272                 buf->count    = cx88q->count++;
273                 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
274                 dprintk( 1, "[%p/%d] %s - append to active\n",
275                         buf, buf->vb.v4l2_buf.index, __func__);
276         }
277 }
278 
279 /* ----------------------------------------------------------- */
280 
281 static void do_cancel_buffers(struct cx8802_dev *dev)
282 {
283         struct cx88_dmaqueue *q = &dev->mpegq;
284         struct cx88_buffer *buf;
285         unsigned long flags;
286 
287         spin_lock_irqsave(&dev->slock,flags);
288         while (!list_empty(&q->active)) {
289                 buf = list_entry(q->active.next, struct cx88_buffer, list);
290                 list_del(&buf->list);
291                 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
292         }
293         spin_unlock_irqrestore(&dev->slock,flags);
294 }
295 
296 void cx8802_cancel_buffers(struct cx8802_dev *dev)
297 {
298         dprintk( 1, "cx8802_cancel_buffers" );
299         cx8802_stop_dma(dev);
300         do_cancel_buffers(dev);
301 }
302 
303 static const char * cx88_mpeg_irqs[32] = {
304         "ts_risci1", NULL, NULL, NULL,
305         "ts_risci2", NULL, NULL, NULL,
306         "ts_oflow",  NULL, NULL, NULL,
307         "ts_sync",   NULL, NULL, NULL,
308         "opc_err", "par_err", "rip_err", "pci_abort",
309         "ts_err?",
310 };
311 
312 static void cx8802_mpeg_irq(struct cx8802_dev *dev)
313 {
314         struct cx88_core *core = dev->core;
315         u32 status, mask, count;
316 
317         dprintk( 1, "cx8802_mpeg_irq\n" );
318         status = cx_read(MO_TS_INTSTAT);
319         mask   = cx_read(MO_TS_INTMSK);
320         if (0 == (status & mask))
321                 return;
322 
323         cx_write(MO_TS_INTSTAT, status);
324 
325         if (debug || (status & mask & ~0xff))
326                 cx88_print_irqbits(core->name, "irq mpeg ",
327                                    cx88_mpeg_irqs, ARRAY_SIZE(cx88_mpeg_irqs),
328                                    status, mask);
329 
330         /* risc op code error */
331         if (status & (1 << 16)) {
332                 printk(KERN_WARNING "%s: mpeg risc op code error\n",core->name);
333                 cx_clear(MO_TS_DMACNTRL, 0x11);
334                 cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH28]);
335         }
336 
337         /* risc1 y */
338         if (status & 0x01) {
339                 dprintk( 1, "wake up\n" );
340                 spin_lock(&dev->slock);
341                 count = cx_read(MO_TS_GPCNT);
342                 cx88_wakeup(dev->core, &dev->mpegq, count);
343                 spin_unlock(&dev->slock);
344         }
345 
346         /* other general errors */
347         if (status & 0x1f0100) {
348                 dprintk( 0, "general errors: 0x%08x\n", status & 0x1f0100 );
349                 spin_lock(&dev->slock);
350                 cx8802_stop_dma(dev);
351                 spin_unlock(&dev->slock);
352         }
353 }
354 
355 #define MAX_IRQ_LOOP 10
356 
357 static irqreturn_t cx8802_irq(int irq, void *dev_id)
358 {
359         struct cx8802_dev *dev = dev_id;
360         struct cx88_core *core = dev->core;
361         u32 status;
362         int loop, handled = 0;
363 
364         for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
365                 status = cx_read(MO_PCI_INTSTAT) &
366                         (core->pci_irqmask | PCI_INT_TSINT);
367                 if (0 == status)
368                         goto out;
369                 dprintk( 1, "cx8802_irq\n" );
370                 dprintk( 1, "    loop: %d/%d\n", loop, MAX_IRQ_LOOP );
371                 dprintk( 1, "    status: %d\n", status );
372                 handled = 1;
373                 cx_write(MO_PCI_INTSTAT, status);
374 
375                 if (status & core->pci_irqmask)
376                         cx88_core_irq(core,status);
377                 if (status & PCI_INT_TSINT)
378                         cx8802_mpeg_irq(dev);
379         }
380         if (MAX_IRQ_LOOP == loop) {
381                 dprintk( 0, "clearing mask\n" );
382                 printk(KERN_WARNING "%s/0: irq loop -- clearing mask\n",
383                        core->name);
384                 cx_write(MO_PCI_INTMSK,0);
385         }
386 
387  out:
388         return IRQ_RETVAL(handled);
389 }
390 
391 static int cx8802_init_common(struct cx8802_dev *dev)
392 {
393         struct cx88_core *core = dev->core;
394         int err;
395 
396         /* pci init */
397         if (pci_enable_device(dev->pci))
398                 return -EIO;
399         pci_set_master(dev->pci);
400         if (!pci_dma_supported(dev->pci,DMA_BIT_MASK(32))) {
401                 printk("%s/2: Oops: no 32bit PCI DMA ???\n",dev->core->name);
402                 return -EIO;
403         }
404 
405         dev->pci_rev = dev->pci->revision;
406         pci_read_config_byte(dev->pci, PCI_LATENCY_TIMER,  &dev->pci_lat);
407         printk(KERN_INFO "%s/2: found at %s, rev: %d, irq: %d, "
408                "latency: %d, mmio: 0x%llx\n", dev->core->name,
409                pci_name(dev->pci), dev->pci_rev, dev->pci->irq,
410                dev->pci_lat,(unsigned long long)pci_resource_start(dev->pci,0));
411 
412         /* initialize driver struct */
413         spin_lock_init(&dev->slock);
414 
415         /* init dma queue */
416         INIT_LIST_HEAD(&dev->mpegq.active);
417 
418         /* get irq */
419         err = request_irq(dev->pci->irq, cx8802_irq,
420                           IRQF_SHARED, dev->core->name, dev);
421         if (err < 0) {
422                 printk(KERN_ERR "%s: can't get IRQ %d\n",
423                        dev->core->name, dev->pci->irq);
424                 return err;
425         }
426         cx_set(MO_PCI_INTMSK, core->pci_irqmask);
427 
428         /* everything worked */
429         pci_set_drvdata(dev->pci,dev);
430         return 0;
431 }
432 
433 static void cx8802_fini_common(struct cx8802_dev *dev)
434 {
435         dprintk( 2, "cx8802_fini_common\n" );
436         cx8802_stop_dma(dev);
437         pci_disable_device(dev->pci);
438 
439         /* unregister stuff */
440         free_irq(dev->pci->irq, dev);
441 }
442 
443 /* ----------------------------------------------------------- */
444 
445 static int cx8802_suspend_common(struct pci_dev *pci_dev, pm_message_t state)
446 {
447         struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
448         struct cx88_core *core = dev->core;
449         unsigned long flags;
450 
451         /* stop mpeg dma */
452         spin_lock_irqsave(&dev->slock, flags);
453         if (!list_empty(&dev->mpegq.active)) {
454                 dprintk( 2, "suspend\n" );
455                 printk("%s: suspend mpeg\n", core->name);
456                 cx8802_stop_dma(dev);
457         }
458         spin_unlock_irqrestore(&dev->slock, flags);
459 
460         /* FIXME -- shutdown device */
461         cx88_shutdown(dev->core);
462 
463         pci_save_state(pci_dev);
464         if (0 != pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state))) {
465                 pci_disable_device(pci_dev);
466                 dev->state.disabled = 1;
467         }
468         return 0;
469 }
470 
471 static int cx8802_resume_common(struct pci_dev *pci_dev)
472 {
473         struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
474         struct cx88_core *core = dev->core;
475         unsigned long flags;
476         int err;
477 
478         if (dev->state.disabled) {
479                 err=pci_enable_device(pci_dev);
480                 if (err) {
481                         printk(KERN_ERR "%s: can't enable device\n",
482                                                dev->core->name);
483                         return err;
484                 }
485                 dev->state.disabled = 0;
486         }
487         err=pci_set_power_state(pci_dev, PCI_D0);
488         if (err) {
489                 printk(KERN_ERR "%s: can't enable device\n",
490                                                dev->core->name);
491                 pci_disable_device(pci_dev);
492                 dev->state.disabled = 1;
493 
494                 return err;
495         }
496         pci_restore_state(pci_dev);
497 
498         /* FIXME: re-initialize hardware */
499         cx88_reset(dev->core);
500 
501         /* restart video+vbi capture */
502         spin_lock_irqsave(&dev->slock, flags);
503         if (!list_empty(&dev->mpegq.active)) {
504                 printk("%s: resume mpeg\n", core->name);
505                 cx8802_restart_queue(dev,&dev->mpegq);
506         }
507         spin_unlock_irqrestore(&dev->slock, flags);
508 
509         return 0;
510 }
511 
512 struct cx8802_driver * cx8802_get_driver(struct cx8802_dev *dev, enum cx88_board_type btype)
513 {
514         struct cx8802_driver *d;
515 
516         list_for_each_entry(d, &dev->drvlist, drvlist)
517                 if (d->type_id == btype)
518                         return d;
519 
520         return NULL;
521 }
522 
523 /* Driver asked for hardware access. */
524 static int cx8802_request_acquire(struct cx8802_driver *drv)
525 {
526         struct cx88_core *core = drv->core;
527         unsigned int    i;
528 
529         /* Fail a request for hardware if the device is busy. */
530         if (core->active_type_id != CX88_BOARD_NONE &&
531             core->active_type_id != drv->type_id)
532                 return -EBUSY;
533 
534         if (drv->type_id == CX88_MPEG_DVB) {
535                 /* When switching to DVB, always set the input to the tuner */
536                 core->last_analog_input = core->input;
537                 core->input = 0;
538                 for (i = 0;
539                      i < (sizeof(core->board.input) / sizeof(struct cx88_input));
540                      i++) {
541                         if (core->board.input[i].type == CX88_VMUX_DVB) {
542                                 core->input = i;
543                                 break;
544                         }
545                 }
546         }
547 
548         if (drv->advise_acquire)
549         {
550                 core->active_ref++;
551                 if (core->active_type_id == CX88_BOARD_NONE) {
552                         core->active_type_id = drv->type_id;
553                         drv->advise_acquire(drv);
554                 }
555 
556                 mpeg_dbg(1,"%s() Post acquire GPIO=%x\n", __func__, cx_read(MO_GP0_IO));
557         }
558 
559         return 0;
560 }
561 
562 /* Driver asked to release hardware. */
563 static int cx8802_request_release(struct cx8802_driver *drv)
564 {
565         struct cx88_core *core = drv->core;
566 
567         if (drv->advise_release && --core->active_ref == 0)
568         {
569                 if (drv->type_id == CX88_MPEG_DVB) {
570                         /* If the DVB driver is releasing, reset the input
571                            state to the last configured analog input */
572                         core->input = core->last_analog_input;
573                 }
574 
575                 drv->advise_release(drv);
576                 core->active_type_id = CX88_BOARD_NONE;
577                 mpeg_dbg(1,"%s() Post release GPIO=%x\n", __func__, cx_read(MO_GP0_IO));
578         }
579 
580         return 0;
581 }
582 
583 static int cx8802_check_driver(struct cx8802_driver *drv)
584 {
585         if (drv == NULL)
586                 return -ENODEV;
587 
588         if ((drv->type_id != CX88_MPEG_DVB) &&
589                 (drv->type_id != CX88_MPEG_BLACKBIRD))
590                 return -EINVAL;
591 
592         if ((drv->hw_access != CX8802_DRVCTL_SHARED) &&
593                 (drv->hw_access != CX8802_DRVCTL_EXCLUSIVE))
594                 return -EINVAL;
595 
596         if ((drv->probe == NULL) ||
597                 (drv->remove == NULL) ||
598                 (drv->advise_acquire == NULL) ||
599                 (drv->advise_release == NULL))
600                 return -EINVAL;
601 
602         return 0;
603 }
604 
605 int cx8802_register_driver(struct cx8802_driver *drv)
606 {
607         struct cx8802_dev *dev;
608         struct cx8802_driver *driver;
609         int err, i = 0;
610 
611         printk(KERN_INFO
612                "cx88/2: registering cx8802 driver, type: %s access: %s\n",
613                drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
614                drv->hw_access == CX8802_DRVCTL_SHARED ? "shared" : "exclusive");
615 
616         if ((err = cx8802_check_driver(drv)) != 0) {
617                 printk(KERN_ERR "cx88/2: cx8802_driver is invalid\n");
618                 return err;
619         }
620 
621         mutex_lock(&cx8802_mutex);
622 
623         list_for_each_entry(dev, &cx8802_devlist, devlist) {
624                 printk(KERN_INFO
625                        "%s/2: subsystem: %04x:%04x, board: %s [card=%d]\n",
626                        dev->core->name, dev->pci->subsystem_vendor,
627                        dev->pci->subsystem_device, dev->core->board.name,
628                        dev->core->boardnr);
629 
630                 /* Bring up a new struct for each driver instance */
631                 driver = kzalloc(sizeof(*drv),GFP_KERNEL);
632                 if (driver == NULL) {
633                         err = -ENOMEM;
634                         goto out;
635                 }
636 
637                 /* Snapshot of the driver registration data */
638                 drv->core = dev->core;
639                 drv->suspend = cx8802_suspend_common;
640                 drv->resume = cx8802_resume_common;
641                 drv->request_acquire = cx8802_request_acquire;
642                 drv->request_release = cx8802_request_release;
643                 memcpy(driver, drv, sizeof(*driver));
644 
645                 mutex_lock(&drv->core->lock);
646                 err = drv->probe(driver);
647                 if (err == 0) {
648                         i++;
649                         list_add_tail(&driver->drvlist, &dev->drvlist);
650                 } else {
651                         printk(KERN_ERR
652                                "%s/2: cx8802 probe failed, err = %d\n",
653                                dev->core->name, err);
654                 }
655                 mutex_unlock(&drv->core->lock);
656         }
657 
658         err = i ? 0 : -ENODEV;
659 out:
660         mutex_unlock(&cx8802_mutex);
661         return err;
662 }
663 
664 int cx8802_unregister_driver(struct cx8802_driver *drv)
665 {
666         struct cx8802_dev *dev;
667         struct cx8802_driver *d, *dtmp;
668         int err = 0;
669 
670         printk(KERN_INFO
671                "cx88/2: unregistering cx8802 driver, type: %s access: %s\n",
672                drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
673                drv->hw_access == CX8802_DRVCTL_SHARED ? "shared" : "exclusive");
674 
675         mutex_lock(&cx8802_mutex);
676 
677         list_for_each_entry(dev, &cx8802_devlist, devlist) {
678                 printk(KERN_INFO
679                        "%s/2: subsystem: %04x:%04x, board: %s [card=%d]\n",
680                        dev->core->name, dev->pci->subsystem_vendor,
681                        dev->pci->subsystem_device, dev->core->board.name,
682                        dev->core->boardnr);
683 
684                 mutex_lock(&dev->core->lock);
685 
686                 list_for_each_entry_safe(d, dtmp, &dev->drvlist, drvlist) {
687                         /* only unregister the correct driver type */
688                         if (d->type_id != drv->type_id)
689                                 continue;
690 
691                         err = d->remove(d);
692                         if (err == 0) {
693                                 list_del(&d->drvlist);
694                                 kfree(d);
695                         } else
696                                 printk(KERN_ERR "%s/2: cx8802 driver remove "
697                                        "failed (%d)\n", dev->core->name, err);
698                 }
699 
700                 mutex_unlock(&dev->core->lock);
701         }
702 
703         mutex_unlock(&cx8802_mutex);
704 
705         return err;
706 }
707 
708 /* ----------------------------------------------------------- */
709 static int cx8802_probe(struct pci_dev *pci_dev,
710                         const struct pci_device_id *pci_id)
711 {
712         struct cx8802_dev *dev;
713         struct cx88_core  *core;
714         int err;
715 
716         /* general setup */
717         core = cx88_core_get(pci_dev);
718         if (NULL == core)
719                 return -EINVAL;
720 
721         printk("%s/2: cx2388x 8802 Driver Manager\n", core->name);
722 
723         err = -ENODEV;
724         if (!core->board.mpeg)
725                 goto fail_core;
726 
727         err = -ENOMEM;
728         dev = kzalloc(sizeof(*dev),GFP_KERNEL);
729         if (NULL == dev)
730                 goto fail_core;
731         dev->pci = pci_dev;
732         dev->alloc_ctx = vb2_dma_sg_init_ctx(&pci_dev->dev);
733         if (IS_ERR(dev->alloc_ctx)) {
734                 err = PTR_ERR(dev->alloc_ctx);
735                 goto fail_core;
736         }
737         dev->core = core;
738 
739         /* Maintain a reference so cx88-video can query the 8802 device. */
740         core->dvbdev = dev;
741 
742         err = cx8802_init_common(dev);
743         if (err != 0)
744                 goto fail_free;
745 
746         INIT_LIST_HEAD(&dev->drvlist);
747         mutex_lock(&cx8802_mutex);
748         list_add_tail(&dev->devlist,&cx8802_devlist);
749         mutex_unlock(&cx8802_mutex);
750 
751         /* now autoload cx88-dvb or cx88-blackbird */
752         request_modules(dev);
753         return 0;
754 
755  fail_free:
756         vb2_dma_sg_cleanup_ctx(dev->alloc_ctx);
757         kfree(dev);
758  fail_core:
759         core->dvbdev = NULL;
760         cx88_core_put(core,pci_dev);
761         return err;
762 }
763 
764 static void cx8802_remove(struct pci_dev *pci_dev)
765 {
766         struct cx8802_dev *dev;
767 
768         dev = pci_get_drvdata(pci_dev);
769 
770         dprintk( 1, "%s\n", __func__);
771 
772         flush_request_modules(dev);
773 
774         mutex_lock(&dev->core->lock);
775 
776         if (!list_empty(&dev->drvlist)) {
777                 struct cx8802_driver *drv, *tmp;
778                 int err;
779 
780                 printk(KERN_WARNING "%s/2: Trying to remove cx8802 driver "
781                        "while cx8802 sub-drivers still loaded?!\n",
782                        dev->core->name);
783 
784                 list_for_each_entry_safe(drv, tmp, &dev->drvlist, drvlist) {
785                         err = drv->remove(drv);
786                         if (err == 0) {
787                                 list_del(&drv->drvlist);
788                         } else
789                                 printk(KERN_ERR "%s/2: cx8802 driver remove "
790                                        "failed (%d)\n", dev->core->name, err);
791                         kfree(drv);
792                 }
793         }
794 
795         mutex_unlock(&dev->core->lock);
796 
797         /* Destroy any 8802 reference. */
798         dev->core->dvbdev = NULL;
799 
800         /* common */
801         cx8802_fini_common(dev);
802         cx88_core_put(dev->core,dev->pci);
803         vb2_dma_sg_cleanup_ctx(dev->alloc_ctx);
804         kfree(dev);
805 }
806 
807 static const struct pci_device_id cx8802_pci_tbl[] = {
808         {
809                 .vendor       = 0x14f1,
810                 .device       = 0x8802,
811                 .subvendor    = PCI_ANY_ID,
812                 .subdevice    = PCI_ANY_ID,
813         },{
814                 /* --- end of list --- */
815         }
816 };
817 MODULE_DEVICE_TABLE(pci, cx8802_pci_tbl);
818 
819 static struct pci_driver cx8802_pci_driver = {
820         .name     = "cx88-mpeg driver manager",
821         .id_table = cx8802_pci_tbl,
822         .probe    = cx8802_probe,
823         .remove   = cx8802_remove,
824 };
825 
826 module_pci_driver(cx8802_pci_driver);
827 
828 EXPORT_SYMBOL(cx8802_buf_prepare);
829 EXPORT_SYMBOL(cx8802_buf_queue);
830 EXPORT_SYMBOL(cx8802_cancel_buffers);
831 EXPORT_SYMBOL(cx8802_start_dma);
832 
833 EXPORT_SYMBOL(cx8802_register_driver);
834 EXPORT_SYMBOL(cx8802_unregister_driver);
835 EXPORT_SYMBOL(cx8802_get_driver);
836 /* ----------------------------------------------------------- */
837 /*
838  * Local variables:
839  * c-basic-offset: 8
840  * End:
841  * kate: eol "unix"; indent-width 3; remove-trailing-space on; replace-trailing-space-save on; tab-width 8; replace-tabs off; space-indent off; mixed-indent off
842  */
843 

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