Version:  2.0.40 2.2.26 2.4.37 3.0 3.1 3.2 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

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 static 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                 buf->vb.width, buf->vb.height, buf->vb.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, buf->vb.width);
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         {
214                 struct cx88_buffer *prev;
215                 prev = NULL;
216 
217                 dprintk(1, "cx8802_restart_queue: queue is empty\n" );
218 
219                 for (;;) {
220                         if (list_empty(&q->queued))
221                                 return 0;
222                         buf = list_entry(q->queued.next, struct cx88_buffer, vb.queue);
223                         if (NULL == prev) {
224                                 list_move_tail(&buf->vb.queue, &q->active);
225                                 cx8802_start_dma(dev, q, buf);
226                                 buf->vb.state = VIDEOBUF_ACTIVE;
227                                 buf->count    = q->count++;
228                                 mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
229                                 dprintk(1,"[%p/%d] restart_queue - first active\n",
230                                         buf,buf->vb.i);
231 
232                         } else if (prev->vb.width  == buf->vb.width  &&
233                                    prev->vb.height == buf->vb.height &&
234                                    prev->fmt       == buf->fmt) {
235                                 list_move_tail(&buf->vb.queue, &q->active);
236                                 buf->vb.state = VIDEOBUF_ACTIVE;
237                                 buf->count    = q->count++;
238                                 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
239                                 dprintk(1,"[%p/%d] restart_queue - move to active\n",
240                                         buf,buf->vb.i);
241                         } else {
242                                 return 0;
243                         }
244                         prev = buf;
245                 }
246                 return 0;
247         }
248 
249         buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
250         dprintk(2,"restart_queue [%p/%d]: restart dma\n",
251                 buf, buf->vb.i);
252         cx8802_start_dma(dev, q, buf);
253         list_for_each_entry(buf, &q->active, vb.queue)
254                 buf->count = q->count++;
255         mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
256         return 0;
257 }
258 
259 /* ------------------------------------------------------------------ */
260 
261 int cx8802_buf_prepare(struct videobuf_queue *q, struct cx8802_dev *dev,
262                         struct cx88_buffer *buf, enum v4l2_field field)
263 {
264         int size = dev->ts_packet_size * dev->ts_packet_count;
265         struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
266         int rc;
267 
268         dprintk(1, "%s: %p\n", __func__, buf);
269         if (0 != buf->vb.baddr  &&  buf->vb.bsize < size)
270                 return -EINVAL;
271 
272         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
273                 buf->vb.width  = dev->ts_packet_size;
274                 buf->vb.height = dev->ts_packet_count;
275                 buf->vb.size   = size;
276                 buf->vb.field  = field /*V4L2_FIELD_TOP*/;
277 
278                 if (0 != (rc = videobuf_iolock(q,&buf->vb,NULL)))
279                         goto fail;
280                 cx88_risc_databuffer(dev->pci, &buf->risc,
281                                      dma->sglist,
282                                      buf->vb.width, buf->vb.height, 0);
283         }
284         buf->vb.state = VIDEOBUF_PREPARED;
285         return 0;
286 
287  fail:
288         cx88_free_buffer(q,buf);
289         return rc;
290 }
291 
292 void cx8802_buf_queue(struct cx8802_dev *dev, struct cx88_buffer *buf)
293 {
294         struct cx88_buffer    *prev;
295         struct cx88_dmaqueue  *cx88q = &dev->mpegq;
296 
297         dprintk( 1, "cx8802_buf_queue\n" );
298         /* add jump to stopper */
299         buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
300         buf->risc.jmp[1] = cpu_to_le32(cx88q->stopper.dma);
301 
302         if (list_empty(&cx88q->active)) {
303                 dprintk( 1, "queue is empty - first active\n" );
304                 list_add_tail(&buf->vb.queue,&cx88q->active);
305                 cx8802_start_dma(dev, cx88q, buf);
306                 buf->vb.state = VIDEOBUF_ACTIVE;
307                 buf->count    = cx88q->count++;
308                 mod_timer(&cx88q->timeout, jiffies+BUFFER_TIMEOUT);
309                 dprintk(1,"[%p/%d] %s - first active\n",
310                         buf, buf->vb.i, __func__);
311 
312         } else {
313                 dprintk( 1, "queue is not empty - append to active\n" );
314                 prev = list_entry(cx88q->active.prev, struct cx88_buffer, vb.queue);
315                 list_add_tail(&buf->vb.queue,&cx88q->active);
316                 buf->vb.state = VIDEOBUF_ACTIVE;
317                 buf->count    = cx88q->count++;
318                 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
319                 dprintk( 1, "[%p/%d] %s - append to active\n",
320                         buf, buf->vb.i, __func__);
321         }
322 }
323 
324 /* ----------------------------------------------------------- */
325 
326 static void do_cancel_buffers(struct cx8802_dev *dev, const char *reason, int restart)
327 {
328         struct cx88_dmaqueue *q = &dev->mpegq;
329         struct cx88_buffer *buf;
330         unsigned long flags;
331 
332         spin_lock_irqsave(&dev->slock,flags);
333         while (!list_empty(&q->active)) {
334                 buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
335                 list_del(&buf->vb.queue);
336                 buf->vb.state = VIDEOBUF_ERROR;
337                 wake_up(&buf->vb.done);
338                 dprintk(1,"[%p/%d] %s - dma=0x%08lx\n",
339                         buf, buf->vb.i, reason, (unsigned long)buf->risc.dma);
340         }
341         if (restart)
342         {
343                 dprintk(1, "restarting queue\n" );
344                 cx8802_restart_queue(dev,q);
345         }
346         spin_unlock_irqrestore(&dev->slock,flags);
347 }
348 
349 void cx8802_cancel_buffers(struct cx8802_dev *dev)
350 {
351         struct cx88_dmaqueue *q = &dev->mpegq;
352 
353         dprintk( 1, "cx8802_cancel_buffers" );
354         del_timer_sync(&q->timeout);
355         cx8802_stop_dma(dev);
356         do_cancel_buffers(dev,"cancel",0);
357 }
358 
359 static void cx8802_timeout(unsigned long data)
360 {
361         struct cx8802_dev *dev = (struct cx8802_dev*)data;
362 
363         dprintk(1, "%s\n",__func__);
364 
365         if (debug)
366                 cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH28]);
367         cx8802_stop_dma(dev);
368         do_cancel_buffers(dev,"timeout",1);
369 }
370 
371 static const char * cx88_mpeg_irqs[32] = {
372         "ts_risci1", NULL, NULL, NULL,
373         "ts_risci2", NULL, NULL, NULL,
374         "ts_oflow",  NULL, NULL, NULL,
375         "ts_sync",   NULL, NULL, NULL,
376         "opc_err", "par_err", "rip_err", "pci_abort",
377         "ts_err?",
378 };
379 
380 static void cx8802_mpeg_irq(struct cx8802_dev *dev)
381 {
382         struct cx88_core *core = dev->core;
383         u32 status, mask, count;
384 
385         dprintk( 1, "cx8802_mpeg_irq\n" );
386         status = cx_read(MO_TS_INTSTAT);
387         mask   = cx_read(MO_TS_INTMSK);
388         if (0 == (status & mask))
389                 return;
390 
391         cx_write(MO_TS_INTSTAT, status);
392 
393         if (debug || (status & mask & ~0xff))
394                 cx88_print_irqbits(core->name, "irq mpeg ",
395                                    cx88_mpeg_irqs, ARRAY_SIZE(cx88_mpeg_irqs),
396                                    status, mask);
397 
398         /* risc op code error */
399         if (status & (1 << 16)) {
400                 printk(KERN_WARNING "%s: mpeg risc op code error\n",core->name);
401                 cx_clear(MO_TS_DMACNTRL, 0x11);
402                 cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH28]);
403         }
404 
405         /* risc1 y */
406         if (status & 0x01) {
407                 dprintk( 1, "wake up\n" );
408                 spin_lock(&dev->slock);
409                 count = cx_read(MO_TS_GPCNT);
410                 cx88_wakeup(dev->core, &dev->mpegq, count);
411                 spin_unlock(&dev->slock);
412         }
413 
414         /* risc2 y */
415         if (status & 0x10) {
416                 spin_lock(&dev->slock);
417                 cx8802_restart_queue(dev,&dev->mpegq);
418                 spin_unlock(&dev->slock);
419         }
420 
421         /* other general errors */
422         if (status & 0x1f0100) {
423                 dprintk( 0, "general errors: 0x%08x\n", status & 0x1f0100 );
424                 spin_lock(&dev->slock);
425                 cx8802_stop_dma(dev);
426                 cx8802_restart_queue(dev,&dev->mpegq);
427                 spin_unlock(&dev->slock);
428         }
429 }
430 
431 #define MAX_IRQ_LOOP 10
432 
433 static irqreturn_t cx8802_irq(int irq, void *dev_id)
434 {
435         struct cx8802_dev *dev = dev_id;
436         struct cx88_core *core = dev->core;
437         u32 status;
438         int loop, handled = 0;
439 
440         for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
441                 status = cx_read(MO_PCI_INTSTAT) &
442                         (core->pci_irqmask | PCI_INT_TSINT);
443                 if (0 == status)
444                         goto out;
445                 dprintk( 1, "cx8802_irq\n" );
446                 dprintk( 1, "    loop: %d/%d\n", loop, MAX_IRQ_LOOP );
447                 dprintk( 1, "    status: %d\n", status );
448                 handled = 1;
449                 cx_write(MO_PCI_INTSTAT, status);
450 
451                 if (status & core->pci_irqmask)
452                         cx88_core_irq(core,status);
453                 if (status & PCI_INT_TSINT)
454                         cx8802_mpeg_irq(dev);
455         }
456         if (MAX_IRQ_LOOP == loop) {
457                 dprintk( 0, "clearing mask\n" );
458                 printk(KERN_WARNING "%s/0: irq loop -- clearing mask\n",
459                        core->name);
460                 cx_write(MO_PCI_INTMSK,0);
461         }
462 
463  out:
464         return IRQ_RETVAL(handled);
465 }
466 
467 static int cx8802_init_common(struct cx8802_dev *dev)
468 {
469         struct cx88_core *core = dev->core;
470         int err;
471 
472         /* pci init */
473         if (pci_enable_device(dev->pci))
474                 return -EIO;
475         pci_set_master(dev->pci);
476         if (!pci_dma_supported(dev->pci,DMA_BIT_MASK(32))) {
477                 printk("%s/2: Oops: no 32bit PCI DMA ???\n",dev->core->name);
478                 return -EIO;
479         }
480 
481         dev->pci_rev = dev->pci->revision;
482         pci_read_config_byte(dev->pci, PCI_LATENCY_TIMER,  &dev->pci_lat);
483         printk(KERN_INFO "%s/2: found at %s, rev: %d, irq: %d, "
484                "latency: %d, mmio: 0x%llx\n", dev->core->name,
485                pci_name(dev->pci), dev->pci_rev, dev->pci->irq,
486                dev->pci_lat,(unsigned long long)pci_resource_start(dev->pci,0));
487 
488         /* initialize driver struct */
489         spin_lock_init(&dev->slock);
490 
491         /* init dma queue */
492         INIT_LIST_HEAD(&dev->mpegq.active);
493         INIT_LIST_HEAD(&dev->mpegq.queued);
494         dev->mpegq.timeout.function = cx8802_timeout;
495         dev->mpegq.timeout.data     = (unsigned long)dev;
496         init_timer(&dev->mpegq.timeout);
497         cx88_risc_stopper(dev->pci,&dev->mpegq.stopper,
498                           MO_TS_DMACNTRL,0x11,0x00);
499 
500         /* get irq */
501         err = request_irq(dev->pci->irq, cx8802_irq,
502                           IRQF_SHARED, dev->core->name, dev);
503         if (err < 0) {
504                 printk(KERN_ERR "%s: can't get IRQ %d\n",
505                        dev->core->name, dev->pci->irq);
506                 return err;
507         }
508         cx_set(MO_PCI_INTMSK, core->pci_irqmask);
509 
510         /* everything worked */
511         pci_set_drvdata(dev->pci,dev);
512         return 0;
513 }
514 
515 static void cx8802_fini_common(struct cx8802_dev *dev)
516 {
517         dprintk( 2, "cx8802_fini_common\n" );
518         cx8802_stop_dma(dev);
519         pci_disable_device(dev->pci);
520 
521         /* unregister stuff */
522         free_irq(dev->pci->irq, dev);
523 
524         /* free memory */
525         btcx_riscmem_free(dev->pci,&dev->mpegq.stopper);
526 }
527 
528 /* ----------------------------------------------------------- */
529 
530 static int cx8802_suspend_common(struct pci_dev *pci_dev, pm_message_t state)
531 {
532         struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
533         struct cx88_core *core = dev->core;
534         unsigned long flags;
535 
536         /* stop mpeg dma */
537         spin_lock_irqsave(&dev->slock, flags);
538         if (!list_empty(&dev->mpegq.active)) {
539                 dprintk( 2, "suspend\n" );
540                 printk("%s: suspend mpeg\n", core->name);
541                 cx8802_stop_dma(dev);
542                 del_timer(&dev->mpegq.timeout);
543         }
544         spin_unlock_irqrestore(&dev->slock, flags);
545 
546         /* FIXME -- shutdown device */
547         cx88_shutdown(dev->core);
548 
549         pci_save_state(pci_dev);
550         if (0 != pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state))) {
551                 pci_disable_device(pci_dev);
552                 dev->state.disabled = 1;
553         }
554         return 0;
555 }
556 
557 static int cx8802_resume_common(struct pci_dev *pci_dev)
558 {
559         struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
560         struct cx88_core *core = dev->core;
561         unsigned long flags;
562         int err;
563 
564         if (dev->state.disabled) {
565                 err=pci_enable_device(pci_dev);
566                 if (err) {
567                         printk(KERN_ERR "%s: can't enable device\n",
568                                                dev->core->name);
569                         return err;
570                 }
571                 dev->state.disabled = 0;
572         }
573         err=pci_set_power_state(pci_dev, PCI_D0);
574         if (err) {
575                 printk(KERN_ERR "%s: can't enable device\n",
576                                                dev->core->name);
577                 pci_disable_device(pci_dev);
578                 dev->state.disabled = 1;
579 
580                 return err;
581         }
582         pci_restore_state(pci_dev);
583 
584         /* FIXME: re-initialize hardware */
585         cx88_reset(dev->core);
586 
587         /* restart video+vbi capture */
588         spin_lock_irqsave(&dev->slock, flags);
589         if (!list_empty(&dev->mpegq.active)) {
590                 printk("%s: resume mpeg\n", core->name);
591                 cx8802_restart_queue(dev,&dev->mpegq);
592         }
593         spin_unlock_irqrestore(&dev->slock, flags);
594 
595         return 0;
596 }
597 
598 struct cx8802_driver * cx8802_get_driver(struct cx8802_dev *dev, enum cx88_board_type btype)
599 {
600         struct cx8802_driver *d;
601 
602         list_for_each_entry(d, &dev->drvlist, drvlist)
603                 if (d->type_id == btype)
604                         return d;
605 
606         return NULL;
607 }
608 
609 /* Driver asked for hardware access. */
610 static int cx8802_request_acquire(struct cx8802_driver *drv)
611 {
612         struct cx88_core *core = drv->core;
613         unsigned int    i;
614 
615         /* Fail a request for hardware if the device is busy. */
616         if (core->active_type_id != CX88_BOARD_NONE &&
617             core->active_type_id != drv->type_id)
618                 return -EBUSY;
619 
620         if (drv->type_id == CX88_MPEG_DVB) {
621                 /* When switching to DVB, always set the input to the tuner */
622                 core->last_analog_input = core->input;
623                 core->input = 0;
624                 for (i = 0;
625                      i < (sizeof(core->board.input) / sizeof(struct cx88_input));
626                      i++) {
627                         if (core->board.input[i].type == CX88_VMUX_DVB) {
628                                 core->input = i;
629                                 break;
630                         }
631                 }
632         }
633 
634         if (drv->advise_acquire)
635         {
636                 core->active_ref++;
637                 if (core->active_type_id == CX88_BOARD_NONE) {
638                         core->active_type_id = drv->type_id;
639                         drv->advise_acquire(drv);
640                 }
641 
642                 mpeg_dbg(1,"%s() Post acquire GPIO=%x\n", __func__, cx_read(MO_GP0_IO));
643         }
644 
645         return 0;
646 }
647 
648 /* Driver asked to release hardware. */
649 static int cx8802_request_release(struct cx8802_driver *drv)
650 {
651         struct cx88_core *core = drv->core;
652 
653         if (drv->advise_release && --core->active_ref == 0)
654         {
655                 if (drv->type_id == CX88_MPEG_DVB) {
656                         /* If the DVB driver is releasing, reset the input
657                            state to the last configured analog input */
658                         core->input = core->last_analog_input;
659                 }
660 
661                 drv->advise_release(drv);
662                 core->active_type_id = CX88_BOARD_NONE;
663                 mpeg_dbg(1,"%s() Post release GPIO=%x\n", __func__, cx_read(MO_GP0_IO));
664         }
665 
666         return 0;
667 }
668 
669 static int cx8802_check_driver(struct cx8802_driver *drv)
670 {
671         if (drv == NULL)
672                 return -ENODEV;
673 
674         if ((drv->type_id != CX88_MPEG_DVB) &&
675                 (drv->type_id != CX88_MPEG_BLACKBIRD))
676                 return -EINVAL;
677 
678         if ((drv->hw_access != CX8802_DRVCTL_SHARED) &&
679                 (drv->hw_access != CX8802_DRVCTL_EXCLUSIVE))
680                 return -EINVAL;
681 
682         if ((drv->probe == NULL) ||
683                 (drv->remove == NULL) ||
684                 (drv->advise_acquire == NULL) ||
685                 (drv->advise_release == NULL))
686                 return -EINVAL;
687 
688         return 0;
689 }
690 
691 int cx8802_register_driver(struct cx8802_driver *drv)
692 {
693         struct cx8802_dev *dev;
694         struct cx8802_driver *driver;
695         int err, i = 0;
696 
697         printk(KERN_INFO
698                "cx88/2: registering cx8802 driver, type: %s access: %s\n",
699                drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
700                drv->hw_access == CX8802_DRVCTL_SHARED ? "shared" : "exclusive");
701 
702         if ((err = cx8802_check_driver(drv)) != 0) {
703                 printk(KERN_ERR "cx88/2: cx8802_driver is invalid\n");
704                 return err;
705         }
706 
707         mutex_lock(&cx8802_mutex);
708 
709         list_for_each_entry(dev, &cx8802_devlist, devlist) {
710                 printk(KERN_INFO
711                        "%s/2: subsystem: %04x:%04x, board: %s [card=%d]\n",
712                        dev->core->name, dev->pci->subsystem_vendor,
713                        dev->pci->subsystem_device, dev->core->board.name,
714                        dev->core->boardnr);
715 
716                 /* Bring up a new struct for each driver instance */
717                 driver = kzalloc(sizeof(*drv),GFP_KERNEL);
718                 if (driver == NULL) {
719                         err = -ENOMEM;
720                         goto out;
721                 }
722 
723                 /* Snapshot of the driver registration data */
724                 drv->core = dev->core;
725                 drv->suspend = cx8802_suspend_common;
726                 drv->resume = cx8802_resume_common;
727                 drv->request_acquire = cx8802_request_acquire;
728                 drv->request_release = cx8802_request_release;
729                 memcpy(driver, drv, sizeof(*driver));
730 
731                 mutex_lock(&drv->core->lock);
732                 err = drv->probe(driver);
733                 if (err == 0) {
734                         i++;
735                         list_add_tail(&driver->drvlist, &dev->drvlist);
736                 } else {
737                         printk(KERN_ERR
738                                "%s/2: cx8802 probe failed, err = %d\n",
739                                dev->core->name, err);
740                 }
741                 mutex_unlock(&drv->core->lock);
742         }
743 
744         err = i ? 0 : -ENODEV;
745 out:
746         mutex_unlock(&cx8802_mutex);
747         return err;
748 }
749 
750 int cx8802_unregister_driver(struct cx8802_driver *drv)
751 {
752         struct cx8802_dev *dev;
753         struct cx8802_driver *d, *dtmp;
754         int err = 0;
755 
756         printk(KERN_INFO
757                "cx88/2: unregistering cx8802 driver, type: %s access: %s\n",
758                drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
759                drv->hw_access == CX8802_DRVCTL_SHARED ? "shared" : "exclusive");
760 
761         mutex_lock(&cx8802_mutex);
762 
763         list_for_each_entry(dev, &cx8802_devlist, devlist) {
764                 printk(KERN_INFO
765                        "%s/2: subsystem: %04x:%04x, board: %s [card=%d]\n",
766                        dev->core->name, dev->pci->subsystem_vendor,
767                        dev->pci->subsystem_device, dev->core->board.name,
768                        dev->core->boardnr);
769 
770                 mutex_lock(&dev->core->lock);
771 
772                 list_for_each_entry_safe(d, dtmp, &dev->drvlist, drvlist) {
773                         /* only unregister the correct driver type */
774                         if (d->type_id != drv->type_id)
775                                 continue;
776 
777                         err = d->remove(d);
778                         if (err == 0) {
779                                 list_del(&d->drvlist);
780                                 kfree(d);
781                         } else
782                                 printk(KERN_ERR "%s/2: cx8802 driver remove "
783                                        "failed (%d)\n", dev->core->name, err);
784                 }
785 
786                 mutex_unlock(&dev->core->lock);
787         }
788 
789         mutex_unlock(&cx8802_mutex);
790 
791         return err;
792 }
793 
794 /* ----------------------------------------------------------- */
795 static int cx8802_probe(struct pci_dev *pci_dev,
796                         const struct pci_device_id *pci_id)
797 {
798         struct cx8802_dev *dev;
799         struct cx88_core  *core;
800         int err;
801 
802         /* general setup */
803         core = cx88_core_get(pci_dev);
804         if (NULL == core)
805                 return -EINVAL;
806 
807         printk("%s/2: cx2388x 8802 Driver Manager\n", core->name);
808 
809         err = -ENODEV;
810         if (!core->board.mpeg)
811                 goto fail_core;
812 
813         err = -ENOMEM;
814         dev = kzalloc(sizeof(*dev),GFP_KERNEL);
815         if (NULL == dev)
816                 goto fail_core;
817         dev->pci = pci_dev;
818         dev->core = core;
819 
820         /* Maintain a reference so cx88-video can query the 8802 device. */
821         core->dvbdev = dev;
822 
823         err = cx8802_init_common(dev);
824         if (err != 0)
825                 goto fail_free;
826 
827         INIT_LIST_HEAD(&dev->drvlist);
828         mutex_lock(&cx8802_mutex);
829         list_add_tail(&dev->devlist,&cx8802_devlist);
830         mutex_unlock(&cx8802_mutex);
831 
832         /* now autoload cx88-dvb or cx88-blackbird */
833         request_modules(dev);
834         return 0;
835 
836  fail_free:
837         kfree(dev);
838  fail_core:
839         core->dvbdev = NULL;
840         cx88_core_put(core,pci_dev);
841         return err;
842 }
843 
844 static void cx8802_remove(struct pci_dev *pci_dev)
845 {
846         struct cx8802_dev *dev;
847 
848         dev = pci_get_drvdata(pci_dev);
849 
850         dprintk( 1, "%s\n", __func__);
851 
852         flush_request_modules(dev);
853 
854         mutex_lock(&dev->core->lock);
855 
856         if (!list_empty(&dev->drvlist)) {
857                 struct cx8802_driver *drv, *tmp;
858                 int err;
859 
860                 printk(KERN_WARNING "%s/2: Trying to remove cx8802 driver "
861                        "while cx8802 sub-drivers still loaded?!\n",
862                        dev->core->name);
863 
864                 list_for_each_entry_safe(drv, tmp, &dev->drvlist, drvlist) {
865                         err = drv->remove(drv);
866                         if (err == 0) {
867                                 list_del(&drv->drvlist);
868                         } else
869                                 printk(KERN_ERR "%s/2: cx8802 driver remove "
870                                        "failed (%d)\n", dev->core->name, err);
871                         kfree(drv);
872                 }
873         }
874 
875         mutex_unlock(&dev->core->lock);
876 
877         /* Destroy any 8802 reference. */
878         dev->core->dvbdev = NULL;
879 
880         /* common */
881         cx8802_fini_common(dev);
882         cx88_core_put(dev->core,dev->pci);
883         kfree(dev);
884 }
885 
886 static const struct pci_device_id cx8802_pci_tbl[] = {
887         {
888                 .vendor       = 0x14f1,
889                 .device       = 0x8802,
890                 .subvendor    = PCI_ANY_ID,
891                 .subdevice    = PCI_ANY_ID,
892         },{
893                 /* --- end of list --- */
894         }
895 };
896 MODULE_DEVICE_TABLE(pci, cx8802_pci_tbl);
897 
898 static struct pci_driver cx8802_pci_driver = {
899         .name     = "cx88-mpeg driver manager",
900         .id_table = cx8802_pci_tbl,
901         .probe    = cx8802_probe,
902         .remove   = cx8802_remove,
903 };
904 
905 module_pci_driver(cx8802_pci_driver);
906 
907 EXPORT_SYMBOL(cx8802_buf_prepare);
908 EXPORT_SYMBOL(cx8802_buf_queue);
909 EXPORT_SYMBOL(cx8802_cancel_buffers);
910 
911 EXPORT_SYMBOL(cx8802_register_driver);
912 EXPORT_SYMBOL(cx8802_unregister_driver);
913 EXPORT_SYMBOL(cx8802_get_driver);
914 /* ----------------------------------------------------------- */
915 /*
916  * Local variables:
917  * c-basic-offset: 8
918  * End:
919  * 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
920  */
921 

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