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cx88: fix locking of sub-driver operations
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / media / video / cx88 / cx88-mpeg.c
blob9147c16c82afdefeb0546683226f22e59ffaaf9c
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
43 static unsigned int debug;
44 module_param(debug,int,0644);
45 MODULE_PARM_DESC(debug,"enable debug messages [mpeg]");
46
47 #define dprintk(level,fmt, arg...) if (debug >= level) \
48 printk(KERN_DEBUG "%s/2-mpeg: " fmt, dev->core->name, ## arg)
49
50 #define mpeg_dbg(level,fmt, arg...) if (debug >= level) \
51 printk(KERN_DEBUG "%s/2-mpeg: " fmt, core->name, ## arg)
52
53 #if defined(CONFIG_MODULES) && defined(MODULE)
54 static void request_module_async(struct work_struct *work)
55 {
56 struct cx8802_dev *dev=container_of(work, struct cx8802_dev, request_module_wk);
57
58 if (dev->core->board.mpeg & CX88_MPEG_DVB)
59 request_module("cx88-dvb");
60 if (dev->core->board.mpeg & CX88_MPEG_BLACKBIRD)
61 request_module("cx88-blackbird");
62 }
63
64 static void request_modules(struct cx8802_dev *dev)
65 {
66 INIT_WORK(&dev->request_module_wk, request_module_async);
67 schedule_work(&dev->request_module_wk);
68 }
69
70 static void flush_request_modules(struct cx8802_dev *dev)
71 {
72 flush_work_sync(&dev->request_module_wk);
73 }
74 #else
75 #define request_modules(dev)
76 #define flush_request_modules(dev)
77 #endif /* CONFIG_MODULES */
78
79
80 static LIST_HEAD(cx8802_devlist);
81 /* ------------------------------------------------------------------ */
82
83 static int cx8802_start_dma(struct cx8802_dev *dev,
84 struct cx88_dmaqueue *q,
85 struct cx88_buffer *buf)
86 {
87 struct cx88_core *core = dev->core;
88
89 dprintk(1, "cx8802_start_dma w: %d, h: %d, f: %d\n",
90 buf->vb.width, buf->vb.height, buf->vb.field);
91
92 /* setup fifo + format */
93 cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH28],
94 dev->ts_packet_size, buf->risc.dma);
95
96 /* write TS length to chip */
97 cx_write(MO_TS_LNGTH, buf->vb.width);
98
99 /* FIXME: this needs a review.
100 * also: move to cx88-blackbird + cx88-dvb source files? */
101
102 dprintk( 1, "core->active_type_id = 0x%08x\n", core->active_type_id);
103
104 if ( (core->active_type_id == CX88_MPEG_DVB) &&
105 (core->board.mpeg & CX88_MPEG_DVB) ) {
106
107 dprintk( 1, "cx8802_start_dma doing .dvb\n");
108 /* negedge driven & software reset */
109 cx_write(TS_GEN_CNTRL, 0x0040 | dev->ts_gen_cntrl);
110 udelay(100);
111 cx_write(MO_PINMUX_IO, 0x00);
112 cx_write(TS_HW_SOP_CNTRL, 0x47<<16|188<<4|0x01);
113 switch (core->boardnr) {
114 case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_Q:
115 case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_T:
116 case CX88_BOARD_DVICO_FUSIONHDTV_5_GOLD:
117 case CX88_BOARD_PCHDTV_HD5500:
118 cx_write(TS_SOP_STAT, 1<<13);
119 break;
120 case CX88_BOARD_SAMSUNG_SMT_7020:
121 cx_write(TS_SOP_STAT, 0x00);
122 break;
123 case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
124 case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
125 cx_write(MO_PINMUX_IO, 0x88); /* Enable MPEG parallel IO and video signal pins */
126 udelay(100);
127 break;
128 case CX88_BOARD_HAUPPAUGE_HVR1300:
129 /* Enable MPEG parallel IO and video signal pins */
130 cx_write(MO_PINMUX_IO, 0x88);
131 cx_write(TS_SOP_STAT, 0);
132 cx_write(TS_VALERR_CNTRL, 0);
133 break;
134 case CX88_BOARD_PINNACLE_PCTV_HD_800i:
135 /* Enable MPEG parallel IO and video signal pins */
136 cx_write(MO_PINMUX_IO, 0x88);
137 cx_write(TS_HW_SOP_CNTRL, (0x47 << 16) | (188 << 4));
138 dev->ts_gen_cntrl = 5;
139 cx_write(TS_SOP_STAT, 0);
140 cx_write(TS_VALERR_CNTRL, 0);
141 udelay(100);
142 break;
143 default:
144 cx_write(TS_SOP_STAT, 0x00);
145 break;
146 }
147 cx_write(TS_GEN_CNTRL, dev->ts_gen_cntrl);
148 udelay(100);
149 } else if ( (core->active_type_id == CX88_MPEG_BLACKBIRD) &&
150 (core->board.mpeg & CX88_MPEG_BLACKBIRD) ) {
151 dprintk( 1, "cx8802_start_dma doing .blackbird\n");
152 cx_write(MO_PINMUX_IO, 0x88); /* enable MPEG parallel IO */
153
154 cx_write(TS_GEN_CNTRL, 0x46); /* punctured clock TS & posedge driven & software reset */
155 udelay(100);
156
157 cx_write(TS_HW_SOP_CNTRL, 0x408); /* mpeg start byte */
158 cx_write(TS_VALERR_CNTRL, 0x2000);
159
160 cx_write(TS_GEN_CNTRL, 0x06); /* punctured clock TS & posedge driven */
161 udelay(100);
162 } else {
163 printk( "%s() Failed. Unsupported value in .mpeg (0x%08x)\n", __func__,
164 core->board.mpeg );
165 return -EINVAL;
166 }
167
168 /* reset counter */
169 cx_write(MO_TS_GPCNTRL, GP_COUNT_CONTROL_RESET);
170 q->count = 1;
171
172 /* enable irqs */
173 dprintk( 1, "setting the interrupt mask\n" );
174 cx_set(MO_PCI_INTMSK, core->pci_irqmask | PCI_INT_TSINT);
175 cx_set(MO_TS_INTMSK, 0x1f0011);
176
177 /* start dma */
178 cx_set(MO_DEV_CNTRL2, (1<<5));
179 cx_set(MO_TS_DMACNTRL, 0x11);
180 return 0;
181 }
182
183 static int cx8802_stop_dma(struct cx8802_dev *dev)
184 {
185 struct cx88_core *core = dev->core;
186 dprintk( 1, "cx8802_stop_dma\n" );
187
188 /* stop dma */
189 cx_clear(MO_TS_DMACNTRL, 0x11);
190
191 /* disable irqs */
192 cx_clear(MO_PCI_INTMSK, PCI_INT_TSINT);
193 cx_clear(MO_TS_INTMSK, 0x1f0011);
194
195 /* Reset the controller */
196 cx_write(TS_GEN_CNTRL, 0xcd);
197 return 0;
198 }
199
200 static int cx8802_restart_queue(struct cx8802_dev *dev,
201 struct cx88_dmaqueue *q)
202 {
203 struct cx88_buffer *buf;
204
205 dprintk( 1, "cx8802_restart_queue\n" );
206 if (list_empty(&q->active))
207 {
208 struct cx88_buffer *prev;
209 prev = NULL;
210
211 dprintk(1, "cx8802_restart_queue: queue is empty\n" );
212
213 for (;;) {
214 if (list_empty(&q->queued))
215 return 0;
216 buf = list_entry(q->queued.next, struct cx88_buffer, vb.queue);
217 if (NULL == prev) {
218 list_del(&buf->vb.queue);
219 list_add_tail(&buf->vb.queue,&q->active);
220 cx8802_start_dma(dev, q, buf);
221 buf->vb.state = VIDEOBUF_ACTIVE;
222 buf->count = q->count++;
223 mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
224 dprintk(1,"[%p/%d] restart_queue - first active\n",
225 buf,buf->vb.i);
226
227 } else if (prev->vb.width == buf->vb.width &&
228 prev->vb.height == buf->vb.height &&
229 prev->fmt == buf->fmt) {
230 list_del(&buf->vb.queue);
231 list_add_tail(&buf->vb.queue,&q->active);
232 buf->vb.state = VIDEOBUF_ACTIVE;
233 buf->count = q->count++;
234 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
235 dprintk(1,"[%p/%d] restart_queue - move to active\n",
236 buf,buf->vb.i);
237 } else {
238 return 0;
239 }
240 prev = buf;
241 }
242 return 0;
243 }
244
245 buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
246 dprintk(2,"restart_queue [%p/%d]: restart dma\n",
247 buf, buf->vb.i);
248 cx8802_start_dma(dev, q, buf);
249 list_for_each_entry(buf, &q->active, vb.queue)
250 buf->count = q->count++;
251 mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
252 return 0;
253 }
254
255 /* ------------------------------------------------------------------ */
256
257 int cx8802_buf_prepare(struct videobuf_queue *q, struct cx8802_dev *dev,
258 struct cx88_buffer *buf, enum v4l2_field field)
259 {
260 int size = dev->ts_packet_size * dev->ts_packet_count;
261 struct videobuf_dmabuf *dma=videobuf_to_dma(&buf->vb);
262 int rc;
263
264 dprintk(1, "%s: %p\n", __func__, buf);
265 if (0 != buf->vb.baddr && buf->vb.bsize < size)
266 return -EINVAL;
267
268 if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
269 buf->vb.width = dev->ts_packet_size;
270 buf->vb.height = dev->ts_packet_count;
271 buf->vb.size = size;
272 buf->vb.field = field /*V4L2_FIELD_TOP*/;
273
274 if (0 != (rc = videobuf_iolock(q,&buf->vb,NULL)))
275 goto fail;
276 cx88_risc_databuffer(dev->pci, &buf->risc,
277 dma->sglist,
278 buf->vb.width, buf->vb.height, 0);
279 }
280 buf->vb.state = VIDEOBUF_PREPARED;
281 return 0;
282
283 fail:
284 cx88_free_buffer(q,buf);
285 return rc;
286 }
287
288 void cx8802_buf_queue(struct cx8802_dev *dev, struct cx88_buffer *buf)
289 {
290 struct cx88_buffer *prev;
291 struct cx88_dmaqueue *cx88q = &dev->mpegq;
292
293 dprintk( 1, "cx8802_buf_queue\n" );
294 /* add jump to stopper */
295 buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
296 buf->risc.jmp[1] = cpu_to_le32(cx88q->stopper.dma);
297
298 if (list_empty(&cx88q->active)) {
299 dprintk( 1, "queue is empty - first active\n" );
300 list_add_tail(&buf->vb.queue,&cx88q->active);
301 cx8802_start_dma(dev, cx88q, buf);
302 buf->vb.state = VIDEOBUF_ACTIVE;
303 buf->count = cx88q->count++;
304 mod_timer(&cx88q->timeout, jiffies+BUFFER_TIMEOUT);
305 dprintk(1,"[%p/%d] %s - first active\n",
306 buf, buf->vb.i, __func__);
307
308 } else {
309 dprintk( 1, "queue is not empty - append to active\n" );
310 prev = list_entry(cx88q->active.prev, struct cx88_buffer, vb.queue);
311 list_add_tail(&buf->vb.queue,&cx88q->active);
312 buf->vb.state = VIDEOBUF_ACTIVE;
313 buf->count = cx88q->count++;
314 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
315 dprintk( 1, "[%p/%d] %s - append to active\n",
316 buf, buf->vb.i, __func__);
317 }
318 }
319
320 /* ----------------------------------------------------------- */
321
322 static void do_cancel_buffers(struct cx8802_dev *dev, const char *reason, int restart)
323 {
324 struct cx88_dmaqueue *q = &dev->mpegq;
325 struct cx88_buffer *buf;
326 unsigned long flags;
327
328 spin_lock_irqsave(&dev->slock,flags);
329 while (!list_empty(&q->active)) {
330 buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
331 list_del(&buf->vb.queue);
332 buf->vb.state = VIDEOBUF_ERROR;
333 wake_up(&buf->vb.done);
334 dprintk(1,"[%p/%d] %s - dma=0x%08lx\n",
335 buf, buf->vb.i, reason, (unsigned long)buf->risc.dma);
336 }
337 if (restart)
338 {
339 dprintk(1, "restarting queue\n" );
340 cx8802_restart_queue(dev,q);
341 }
342 spin_unlock_irqrestore(&dev->slock,flags);
343 }
344
345 void cx8802_cancel_buffers(struct cx8802_dev *dev)
346 {
347 struct cx88_dmaqueue *q = &dev->mpegq;
348
349 dprintk( 1, "cx8802_cancel_buffers" );
350 del_timer_sync(&q->timeout);
351 cx8802_stop_dma(dev);
352 do_cancel_buffers(dev,"cancel",0);
353 }
354
355 static void cx8802_timeout(unsigned long data)
356 {
357 struct cx8802_dev *dev = (struct cx8802_dev*)data;
358
359 dprintk(1, "%s\n",__func__);
360
361 if (debug)
362 cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH28]);
363 cx8802_stop_dma(dev);
364 do_cancel_buffers(dev,"timeout",1);
365 }
366
367 static const char * cx88_mpeg_irqs[32] = {
368 "ts_risci1", NULL, NULL, NULL,
369 "ts_risci2", NULL, NULL, NULL,
370 "ts_oflow", NULL, NULL, NULL,
371 "ts_sync", NULL, NULL, NULL,
372 "opc_err", "par_err", "rip_err", "pci_abort",
373 "ts_err?",
374 };
375
376 static void cx8802_mpeg_irq(struct cx8802_dev *dev)
377 {
378 struct cx88_core *core = dev->core;
379 u32 status, mask, count;
380
381 dprintk( 1, "cx8802_mpeg_irq\n" );
382 status = cx_read(MO_TS_INTSTAT);
383 mask = cx_read(MO_TS_INTMSK);
384 if (0 == (status & mask))
385 return;
386
387 cx_write(MO_TS_INTSTAT, status);
388
389 if (debug || (status & mask & ~0xff))
390 cx88_print_irqbits(core->name, "irq mpeg ",
391 cx88_mpeg_irqs, ARRAY_SIZE(cx88_mpeg_irqs),
392 status, mask);
393
394 /* risc op code error */
395 if (status & (1 << 16)) {
396 printk(KERN_WARNING "%s: mpeg risc op code error\n",core->name);
397 cx_clear(MO_TS_DMACNTRL, 0x11);
398 cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH28]);
399 }
400
401 /* risc1 y */
402 if (status & 0x01) {
403 dprintk( 1, "wake up\n" );
404 spin_lock(&dev->slock);
405 count = cx_read(MO_TS_GPCNT);
406 cx88_wakeup(dev->core, &dev->mpegq, count);
407 spin_unlock(&dev->slock);
408 }
409
410 /* risc2 y */
411 if (status & 0x10) {
412 spin_lock(&dev->slock);
413 cx8802_restart_queue(dev,&dev->mpegq);
414 spin_unlock(&dev->slock);
415 }
416
417 /* other general errors */
418 if (status & 0x1f0100) {
419 dprintk( 0, "general errors: 0x%08x\n", status & 0x1f0100 );
420 spin_lock(&dev->slock);
421 cx8802_stop_dma(dev);
422 cx8802_restart_queue(dev,&dev->mpegq);
423 spin_unlock(&dev->slock);
424 }
425 }
426
427 #define MAX_IRQ_LOOP 10
428
429 static irqreturn_t cx8802_irq(int irq, void *dev_id)
430 {
431 struct cx8802_dev *dev = dev_id;
432 struct cx88_core *core = dev->core;
433 u32 status;
434 int loop, handled = 0;
435
436 for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
437 status = cx_read(MO_PCI_INTSTAT) &
438 (core->pci_irqmask | PCI_INT_TSINT);
439 if (0 == status)
440 goto out;
441 dprintk( 1, "cx8802_irq\n" );
442 dprintk( 1, " loop: %d/%d\n", loop, MAX_IRQ_LOOP );
443 dprintk( 1, " status: %d\n", status );
444 handled = 1;
445 cx_write(MO_PCI_INTSTAT, status);
446
447 if (status & core->pci_irqmask)
448 cx88_core_irq(core,status);
449 if (status & PCI_INT_TSINT)
450 cx8802_mpeg_irq(dev);
451 };
452 if (MAX_IRQ_LOOP == loop) {
453 dprintk( 0, "clearing mask\n" );
454 printk(KERN_WARNING "%s/0: irq loop -- clearing mask\n",
455 core->name);
456 cx_write(MO_PCI_INTMSK,0);
457 }
458
459 out:
460 return IRQ_RETVAL(handled);
461 }
462
463 static int cx8802_init_common(struct cx8802_dev *dev)
464 {
465 struct cx88_core *core = dev->core;
466 int err;
467
468 /* pci init */
469 if (pci_enable_device(dev->pci))
470 return -EIO;
471 pci_set_master(dev->pci);
472 if (!pci_dma_supported(dev->pci,DMA_BIT_MASK(32))) {
473 printk("%s/2: Oops: no 32bit PCI DMA ???\n",dev->core->name);
474 return -EIO;
475 }
476
477 pci_read_config_byte(dev->pci, PCI_CLASS_REVISION, &dev->pci_rev);
478 pci_read_config_byte(dev->pci, PCI_LATENCY_TIMER, &dev->pci_lat);
479 printk(KERN_INFO "%s/2: found at %s, rev: %d, irq: %d, "
480 "latency: %d, mmio: 0x%llx\n", dev->core->name,
481 pci_name(dev->pci), dev->pci_rev, dev->pci->irq,
482 dev->pci_lat,(unsigned long long)pci_resource_start(dev->pci,0));
483
484 /* initialize driver struct */
485 spin_lock_init(&dev->slock);
486
487 /* init dma queue */
488 INIT_LIST_HEAD(&dev->mpegq.active);
489 INIT_LIST_HEAD(&dev->mpegq.queued);
490 dev->mpegq.timeout.function = cx8802_timeout;
491 dev->mpegq.timeout.data = (unsigned long)dev;
492 init_timer(&dev->mpegq.timeout);
493 cx88_risc_stopper(dev->pci,&dev->mpegq.stopper,
494 MO_TS_DMACNTRL,0x11,0x00);
495
496 /* get irq */
497 err = request_irq(dev->pci->irq, cx8802_irq,
498 IRQF_SHARED | IRQF_DISABLED, dev->core->name, dev);
499 if (err < 0) {
500 printk(KERN_ERR "%s: can't get IRQ %d\n",
501 dev->core->name, dev->pci->irq);
502 return err;
503 }
504 cx_set(MO_PCI_INTMSK, core->pci_irqmask);
505
506 /* everything worked */
507 pci_set_drvdata(dev->pci,dev);
508 return 0;
509 }
510
511 static void cx8802_fini_common(struct cx8802_dev *dev)
512 {
513 dprintk( 2, "cx8802_fini_common\n" );
514 cx8802_stop_dma(dev);
515 pci_disable_device(dev->pci);
516
517 /* unregister stuff */
518 free_irq(dev->pci->irq, dev);
519 pci_set_drvdata(dev->pci, NULL);
520
521 /* free memory */
522 btcx_riscmem_free(dev->pci,&dev->mpegq.stopper);
523 }
524
525 /* ----------------------------------------------------------- */
526
527 static int cx8802_suspend_common(struct pci_dev *pci_dev, pm_message_t state)
528 {
529 struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
530 struct cx88_core *core = dev->core;
531
532 /* stop mpeg dma */
533 spin_lock(&dev->slock);
534 if (!list_empty(&dev->mpegq.active)) {
535 dprintk( 2, "suspend\n" );
536 printk("%s: suspend mpeg\n", core->name);
537 cx8802_stop_dma(dev);
538 del_timer(&dev->mpegq.timeout);
539 }
540 spin_unlock(&dev->slock);
541
542 /* FIXME -- shutdown device */
543 cx88_shutdown(dev->core);
544
545 pci_save_state(pci_dev);
546 if (0 != pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state))) {
547 pci_disable_device(pci_dev);
548 dev->state.disabled = 1;
549 }
550 return 0;
551 }
552
553 static int cx8802_resume_common(struct pci_dev *pci_dev)
554 {
555 struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
556 struct cx88_core *core = dev->core;
557 int err;
558
559 if (dev->state.disabled) {
560 err=pci_enable_device(pci_dev);
561 if (err) {
562 printk(KERN_ERR "%s: can't enable device\n",
563 dev->core->name);
564 return err;
565 }
566 dev->state.disabled = 0;
567 }
568 err=pci_set_power_state(pci_dev, PCI_D0);
569 if (err) {
570 printk(KERN_ERR "%s: can't enable device\n",
571 dev->core->name);
572 pci_disable_device(pci_dev);
573 dev->state.disabled = 1;
574
575 return err;
576 }
577 pci_restore_state(pci_dev);
578
579 /* FIXME: re-initialize hardware */
580 cx88_reset(dev->core);
581
582 /* restart video+vbi capture */
583 spin_lock(&dev->slock);
584 if (!list_empty(&dev->mpegq.active)) {
585 printk("%s: resume mpeg\n", core->name);
586 cx8802_restart_queue(dev,&dev->mpegq);
587 }
588 spin_unlock(&dev->slock);
589
590 return 0;
591 }
592
593 struct cx8802_driver * cx8802_get_driver(struct cx8802_dev *dev, enum cx88_board_type btype)
594 {
595 struct cx8802_driver *d;
596
597 list_for_each_entry(d, &dev->drvlist, drvlist)
598 if (d->type_id == btype)
599 return d;
600
601 return NULL;
602 }
603
604 /* Driver asked for hardware access. */
605 static int cx8802_request_acquire(struct cx8802_driver *drv)
606 {
607 struct cx88_core *core = drv->core;
608 unsigned int i;
609
610 /* Fail a request for hardware if the device is busy. */
611 if (core->active_type_id != CX88_BOARD_NONE &&
612 core->active_type_id != drv->type_id)
613 return -EBUSY;
614
615 core->input = 0;
616 for (i = 0;
617 i < (sizeof(core->board.input) / sizeof(struct cx88_input));
618 i++) {
619 if (core->board.input[i].type == CX88_VMUX_DVB) {
620 core->input = i;
621 break;
622 }
623 }
624
625 if (drv->advise_acquire)
626 {
627 core->active_ref++;
628 if (core->active_type_id == CX88_BOARD_NONE) {
629 core->active_type_id = drv->type_id;
630 drv->advise_acquire(drv);
631 }
632
633 mpeg_dbg(1,"%s() Post acquire GPIO=%x\n", __func__, cx_read(MO_GP0_IO));
634 }
635
636 return 0;
637 }
638
639 /* Driver asked to release hardware. */
640 static int cx8802_request_release(struct cx8802_driver *drv)
641 {
642 struct cx88_core *core = drv->core;
643
644 if (drv->advise_release && --core->active_ref == 0)
645 {
646 drv->advise_release(drv);
647 core->active_type_id = CX88_BOARD_NONE;
648 mpeg_dbg(1,"%s() Post release GPIO=%x\n", __func__, cx_read(MO_GP0_IO));
649 }
650
651 return 0;
652 }
653
654 static int cx8802_check_driver(struct cx8802_driver *drv)
655 {
656 if (drv == NULL)
657 return -ENODEV;
658
659 if ((drv->type_id != CX88_MPEG_DVB) &&
660 (drv->type_id != CX88_MPEG_BLACKBIRD))
661 return -EINVAL;
662
663 if ((drv->hw_access != CX8802_DRVCTL_SHARED) &&
664 (drv->hw_access != CX8802_DRVCTL_EXCLUSIVE))
665 return -EINVAL;
666
667 if ((drv->probe == NULL) ||
668 (drv->remove == NULL) ||
669 (drv->advise_acquire == NULL) ||
670 (drv->advise_release == NULL))
671 return -EINVAL;
672
673 return 0;
674 }
675
676 int cx8802_register_driver(struct cx8802_driver *drv)
677 {
678 struct cx8802_dev *dev;
679 struct cx8802_driver *driver;
680 int err, i = 0;
681
682 printk(KERN_INFO
683 "cx88/2: registering cx8802 driver, type: %s access: %s\n",
684 drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
685 drv->hw_access == CX8802_DRVCTL_SHARED ? "shared" : "exclusive");
686
687 if ((err = cx8802_check_driver(drv)) != 0) {
688 printk(KERN_ERR "cx88/2: cx8802_driver is invalid\n");
689 return err;
690 }
691
692 list_for_each_entry(dev, &cx8802_devlist, devlist) {
693 printk(KERN_INFO
694 "%s/2: subsystem: %04x:%04x, board: %s [card=%d]\n",
695 dev->core->name, dev->pci->subsystem_vendor,
696 dev->pci->subsystem_device, dev->core->board.name,
697 dev->core->boardnr);
698
699 /* Bring up a new struct for each driver instance */
700 driver = kzalloc(sizeof(*drv),GFP_KERNEL);
701 if (driver == NULL)
702 return -ENOMEM;
703
704 /* Snapshot of the driver registration data */
705 drv->core = dev->core;
706 drv->suspend = cx8802_suspend_common;
707 drv->resume = cx8802_resume_common;
708 drv->request_acquire = cx8802_request_acquire;
709 drv->request_release = cx8802_request_release;
710 memcpy(driver, drv, sizeof(*driver));
711
712 err = drv->probe(driver);
713 if (err == 0) {
714 i++;
715 mutex_lock(&drv->core->lock);
716 list_add_tail(&driver->drvlist, &dev->drvlist);
717 mutex_unlock(&drv->core->lock);
718 } else {
719 printk(KERN_ERR
720 "%s/2: cx8802 probe failed, err = %d\n",
721 dev->core->name, err);
722 }
723
724 }
725
726 return i ? 0 : -ENODEV;
727 }
728
729 int cx8802_unregister_driver(struct cx8802_driver *drv)
730 {
731 struct cx8802_dev *dev;
732 struct cx8802_driver *d, *dtmp;
733 int err = 0;
734
735 printk(KERN_INFO
736 "cx88/2: unregistering cx8802 driver, type: %s access: %s\n",
737 drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
738 drv->hw_access == CX8802_DRVCTL_SHARED ? "shared" : "exclusive");
739
740 list_for_each_entry(dev, &cx8802_devlist, devlist) {
741 printk(KERN_INFO
742 "%s/2: subsystem: %04x:%04x, board: %s [card=%d]\n",
743 dev->core->name, dev->pci->subsystem_vendor,
744 dev->pci->subsystem_device, dev->core->board.name,
745 dev->core->boardnr);
746
747 mutex_lock(&dev->core->lock);
748
749 list_for_each_entry_safe(d, dtmp, &dev->drvlist, drvlist) {
750 /* only unregister the correct driver type */
751 if (d->type_id != drv->type_id)
752 continue;
753
754 err = d->remove(d);
755 if (err == 0) {
756 list_del(&d->drvlist);
757 kfree(d);
758 } else
759 printk(KERN_ERR "%s/2: cx8802 driver remove "
760 "failed (%d)\n", dev->core->name, err);
761 }
762
763 mutex_unlock(&dev->core->lock);
764 }
765
766 return err;
767 }
768
769 /* ----------------------------------------------------------- */
770 static int __devinit cx8802_probe(struct pci_dev *pci_dev,
771 const struct pci_device_id *pci_id)
772 {
773 struct cx8802_dev *dev;
774 struct cx88_core *core;
775 int err;
776
777 /* general setup */
778 core = cx88_core_get(pci_dev);
779 if (NULL == core)
780 return -EINVAL;
781
782 printk("%s/2: cx2388x 8802 Driver Manager\n", core->name);
783
784 err = -ENODEV;
785 if (!core->board.mpeg)
786 goto fail_core;
787
788 err = -ENOMEM;
789 dev = kzalloc(sizeof(*dev),GFP_KERNEL);
790 if (NULL == dev)
791 goto fail_core;
792 dev->pci = pci_dev;
793 dev->core = core;
794
795 /* Maintain a reference so cx88-video can query the 8802 device. */
796 core->dvbdev = dev;
797
798 err = cx8802_init_common(dev);
799 if (err != 0)
800 goto fail_free;
801
802 INIT_LIST_HEAD(&dev->drvlist);
803 list_add_tail(&dev->devlist,&cx8802_devlist);
804
805 /* now autoload cx88-dvb or cx88-blackbird */
806 request_modules(dev);
807 return 0;
808
809 fail_free:
810 kfree(dev);
811 fail_core:
812 core->dvbdev = NULL;
813 cx88_core_put(core,pci_dev);
814 return err;
815 }
816
817 static void __devexit cx8802_remove(struct pci_dev *pci_dev)
818 {
819 struct cx8802_dev *dev;
820
821 dev = pci_get_drvdata(pci_dev);
822
823 dprintk( 1, "%s\n", __func__);
824
825 flush_request_modules(dev);
826
827 mutex_lock(&dev->core->lock);
828
829 if (!list_empty(&dev->drvlist)) {
830 struct cx8802_driver *drv, *tmp;
831 int err;
832
833 printk(KERN_WARNING "%s/2: Trying to remove cx8802 driver "
834 "while cx8802 sub-drivers still loaded?!\n",
835 dev->core->name);
836
837 list_for_each_entry_safe(drv, tmp, &dev->drvlist, drvlist) {
838 err = drv->remove(drv);
839 if (err == 0) {
840 list_del(&drv->drvlist);
841 } else
842 printk(KERN_ERR "%s/2: cx8802 driver remove "
843 "failed (%d)\n", dev->core->name, err);
844 kfree(drv);
845 }
846 }
847
848 mutex_unlock(&dev->core->lock);
849
850 /* Destroy any 8802 reference. */
851 dev->core->dvbdev = NULL;
852
853 /* common */
854 cx8802_fini_common(dev);
855 cx88_core_put(dev->core,dev->pci);
856 kfree(dev);
857 }
858
859 static const struct pci_device_id cx8802_pci_tbl[] = {
860 {
861 .vendor = 0x14f1,
862 .device = 0x8802,
863 .subvendor = PCI_ANY_ID,
864 .subdevice = PCI_ANY_ID,
865 },{
866 /* --- end of list --- */
867 }
868 };
869 MODULE_DEVICE_TABLE(pci, cx8802_pci_tbl);
870
871 static struct pci_driver cx8802_pci_driver = {
872 .name = "cx88-mpeg driver manager",
873 .id_table = cx8802_pci_tbl,
874 .probe = cx8802_probe,
875 .remove = __devexit_p(cx8802_remove),
876 };
877
878 static int __init cx8802_init(void)
879 {
880 printk(KERN_INFO "cx88/2: cx2388x MPEG-TS Driver Manager version %d.%d.%d loaded\n",
881 (CX88_VERSION_CODE >> 16) & 0xff,
882 (CX88_VERSION_CODE >> 8) & 0xff,
883 CX88_VERSION_CODE & 0xff);
884 #ifdef SNAPSHOT
885 printk(KERN_INFO "cx2388x: snapshot date %04d-%02d-%02d\n",
886 SNAPSHOT/10000, (SNAPSHOT/100)%100, SNAPSHOT%100);
887 #endif
888 return pci_register_driver(&cx8802_pci_driver);
889 }
890
891 static void __exit cx8802_fini(void)
892 {
893 pci_unregister_driver(&cx8802_pci_driver);
894 }
895
896 module_init(cx8802_init);
897 module_exit(cx8802_fini);
898 EXPORT_SYMBOL(cx8802_buf_prepare);
899 EXPORT_SYMBOL(cx8802_buf_queue);
900 EXPORT_SYMBOL(cx8802_cancel_buffers);
901
902 EXPORT_SYMBOL(cx8802_register_driver);
903 EXPORT_SYMBOL(cx8802_unregister_driver);
904 EXPORT_SYMBOL(cx8802_get_driver);
905 /* ----------------------------------------------------------- */
906 /*
907 * Local variables:
908 * c-basic-offset: 8
909 * End:
910 * 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
911 */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree