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xtensa: strlcpy is smart enough
[linux-block.git] / drivers / media / video / cx88 / cx88-mpeg.c
CommitLineData
1da177e4 1/*
1da177e4
LT		 2 *
3 * Support for the mpeg transport stream transfers
4 * PCI function #2 of the cx2388x.
5 *
6 * (c) 2004 Jelle Foks <jelle@foks.8m.com>
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/moduleparam.h>
27#include <linux/init.h>
28#include <linux/device.h>
29#include <linux/interrupt.h>
30#include <asm/delay.h>
31
32#include "cx88.h"
33
34/* ------------------------------------------------------------------ */
35
36MODULE_DESCRIPTION("mpeg driver for cx2388x based TV cards");
37MODULE_AUTHOR("Jelle Foks <jelle@foks.8m.com>");
38MODULE_AUTHOR("Chris Pascoe <c.pascoe@itee.uq.edu.au>");
39MODULE_AUTHOR("Gerd Knorr <kraxel@bytesex.org> [SuSE Labs]");
40MODULE_LICENSE("GPL");
41
42static unsigned int debug = 0;
43module_param(debug,int,0644);
44MODULE_PARM_DESC(debug,"enable debug messages [mpeg]");
45
46#define dprintk(level,fmt, arg...) if (debug >= level) \
6c5be74c 47 printk(KERN_DEBUG "%s/2-mpeg: " fmt, dev->core->name, ## arg)
1da177e4 48
6c5be74c
ST		 49#define mpeg_dbg(level,fmt, arg...) if (debug >= level) \
50 printk(KERN_DEBUG "%s/2-mpeg: " fmt, core->name, ## arg)
51
77b74774
MR		 52#if defined(CONFIG_MODULES) && defined(MODULE)
53static void request_module_async(struct work_struct *work)
54{
55 struct cx8802_dev *dev=container_of(work, struct cx8802_dev, request_module_wk);
ced80c67
MR		 56
57 if (cx88_boards[dev->core->board].mpeg & CX88_MPEG_DVB)
77b74774 58 request_module("cx88-dvb");
ced80c67
MR		 59 if (cx88_boards[dev->core->board].mpeg & CX88_MPEG_BLACKBIRD)
60 request_module("cx88-blackbird");
77b74774
MR		 61}
62
63static void request_modules(struct cx8802_dev *dev)
64{
65 INIT_WORK(&dev->request_module_wk, request_module_async);
66 schedule_work(&dev->request_module_wk);
67}
68#else
69#define request_modules(dev)
70#endif /* CONFIG_MODULES */
71
72
6c5be74c 73static LIST_HEAD(cx8802_devlist);
1da177e4
LT		 74/* ------------------------------------------------------------------ */
75
76static int cx8802_start_dma(struct cx8802_dev *dev,
77 struct cx88_dmaqueue *q,
78 struct cx88_buffer *buf)
79{
80 struct cx88_core *core = dev->core;
81
76d313bf 82 dprintk(1, "cx8802_start_dma w: %d, h: %d, f: %d\n", dev->width, dev->height, buf->vb.field);
1da177e4
LT		 83
84 /* setup fifo + format */
85 cx88_sram_channel_setup(core, &cx88_sram_channels[SRAM_CH28],
86 dev->ts_packet_size, buf->risc.dma);
87
88 /* write TS length to chip */
89 cx_write(MO_TS_LNGTH, buf->vb.width);
90
1da177e4
LT		 91 /* FIXME: this needs a review.
92 * also: move to cx88-blackbird + cx88-dvb source files? */
93
6c5be74c
ST		 94 dprintk( 1, "core->active_type_id = 0x%08x\n", core->active_type_id);
95
96 if ( (core->active_type_id == CX88_MPEG_DVB) &&
97 (cx88_boards[core->board].mpeg & CX88_MPEG_DVB) ) {
98
99 dprintk( 1, "cx8802_start_dma doing .dvb\n");
1da177e4 100 /* negedge driven & software reset */
f1798495 101 cx_write(TS_GEN_CNTRL, 0x0040 | dev->ts_gen_cntrl);
1da177e4
LT		 102 udelay(100);
103 cx_write(MO_PINMUX_IO, 0x00);
0d723c09 104 cx_write(TS_HW_SOP_CNTRL,0x47<<16|188<<4|0x01);
e52e98a7
MCC		 105 switch (core->board) {
106 case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_Q:
107 case CX88_BOARD_DVICO_FUSIONHDTV_3_GOLD_T:
108 case CX88_BOARD_DVICO_FUSIONHDTV_5_GOLD:
da215d22 109 case CX88_BOARD_PCHDTV_HD5500:
41ef7c1e 110 cx_write(TS_SOP_STAT, 1<<13);
e52e98a7 111 break;
0fa14aa6
ST		 112 case CX88_BOARD_HAUPPAUGE_NOVASPLUS_S1:
113 case CX88_BOARD_HAUPPAUGE_NOVASE2_S1:
114 cx_write(MO_PINMUX_IO, 0x88); /* Enable MPEG parallel IO and video signal pins */
115 udelay(100);
116 break;
6c5be74c
ST		 117 case CX88_BOARD_HAUPPAUGE_HVR1300:
118 break;
e52e98a7 119 default:
41ef7c1e 120 cx_write(TS_SOP_STAT, 0x00);
e52e98a7 121 break;
f1798495 122 }
1da177e4
LT		 123 cx_write(TS_GEN_CNTRL, dev->ts_gen_cntrl);
124 udelay(100);
6c5be74c
ST		 125 } else if ( (core->active_type_id == CX88_MPEG_BLACKBIRD) &&
126 (cx88_boards[core->board].mpeg & CX88_MPEG_BLACKBIRD) ) {
127 dprintk( 1, "cx8802_start_dma doing .blackbird\n");
1da177e4
LT		 128 cx_write(MO_PINMUX_IO, 0x88); /* enable MPEG parallel IO */
129
1da177e4
LT		 130 cx_write(TS_GEN_CNTRL, 0x46); /* punctured clock TS & posedge driven & software reset */
131 udelay(100);
132
133 cx_write(TS_HW_SOP_CNTRL, 0x408); /* mpeg start byte */
1da177e4
LT		 134 cx_write(TS_VALERR_CNTRL, 0x2000);
135
136 cx_write(TS_GEN_CNTRL, 0x06); /* punctured clock TS & posedge driven */
137 udelay(100);
6c5be74c
ST		 138 } else {
139 printk( "%s() Failed. Unsupported value in .mpeg (0x%08x)\n", __FUNCTION__,
140 cx88_boards[core->board].mpeg );
141 return -EINVAL;
1da177e4 142 }
1da177e4
LT		 143
144 /* reset counter */
145 cx_write(MO_TS_GPCNTRL, GP_COUNT_CONTROL_RESET);
146 q->count = 1;
147
148 /* enable irqs */
76d313bf 149 dprintk( 1, "setting the interrupt mask\n" );
1da177e4 150 cx_set(MO_PCI_INTMSK, core->pci_irqmask | 0x04);
b45009b0 151 cx_set(MO_TS_INTMSK, 0x1f0011);
1da177e4
LT		 152
153 /* start dma */
b45009b0
MCC		 154 cx_set(MO_DEV_CNTRL2, (1<<5));
155 cx_set(MO_TS_DMACNTRL, 0x11);
1da177e4
LT		 156 return 0;
157}
158
159static int cx8802_stop_dma(struct cx8802_dev *dev)
160{
161 struct cx88_core *core = dev->core;
76d313bf 162 dprintk( 1, "cx8802_stop_dma\n" );
1da177e4
LT		 163
164 /* stop dma */
165 cx_clear(MO_TS_DMACNTRL, 0x11);
166
167 /* disable irqs */
168 cx_clear(MO_PCI_INTMSK, 0x000004);
169 cx_clear(MO_TS_INTMSK, 0x1f0011);
170
171 /* Reset the controller */
172 cx_write(TS_GEN_CNTRL, 0xcd);
173 return 0;
174}
175
176static int cx8802_restart_queue(struct cx8802_dev *dev,
177 struct cx88_dmaqueue *q)
178{
179 struct cx88_buffer *buf;
180 struct list_head *item;
181
f14ac0bc 182 dprintk( 1, "cx8802_restart_queue\n" );
1da177e4 183 if (list_empty(&q->active))
b45009b0 184 {
f14ac0bc
JF		 185 struct cx88_buffer *prev;
186 prev = NULL;
187
188 dprintk(1, "cx8802_restart_queue: queue is empty\n" );
189
190 for (;;) {
191 if (list_empty(&q->queued))
192 return 0;
193 buf = list_entry(q->queued.next, struct cx88_buffer, vb.queue);
194 if (NULL == prev) {
195 list_del(&buf->vb.queue);
196 list_add_tail(&buf->vb.queue,&q->active);
197 cx8802_start_dma(dev, q, buf);
198 buf->vb.state = STATE_ACTIVE;
199 buf->count = q->count++;
200 mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
201 dprintk(1,"[%p/%d] restart_queue - first active\n",
202 buf,buf->vb.i);
203
204 } else if (prev->vb.width == buf->vb.width &&
205 prev->vb.height == buf->vb.height &&
206 prev->fmt == buf->fmt) {
207 list_del(&buf->vb.queue);
208 list_add_tail(&buf->vb.queue,&q->active);
209 buf->vb.state = STATE_ACTIVE;
210 buf->count = q->count++;
211 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
212 dprintk(1,"[%p/%d] restart_queue - move to active\n",
213 buf,buf->vb.i);
214 } else {
215 return 0;
216 }
217 prev = buf;
218 }
1da177e4 219 return 0;
b45009b0 220 }
1da177e4
LT		 221
222 buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
223 dprintk(2,"restart_queue [%p/%d]: restart dma\n",
224 buf, buf->vb.i);
225 cx8802_start_dma(dev, q, buf);
226 list_for_each(item,&q->active) {
227 buf = list_entry(item, struct cx88_buffer, vb.queue);
228 buf->count = q->count++;
229 }
230 mod_timer(&q->timeout, jiffies+BUFFER_TIMEOUT);
231 return 0;
232}
233
234/* ------------------------------------------------------------------ */
235
c7b0ac05
MCC		 236int cx8802_buf_prepare(struct videobuf_queue *q, struct cx8802_dev *dev,
237 struct cx88_buffer *buf, enum v4l2_field field)
1da177e4
LT		 238{
239 int size = dev->ts_packet_size * dev->ts_packet_count;
240 int rc;
241
242 dprintk(1, "%s: %p\n", __FUNCTION__, buf);
243 if (0 != buf->vb.baddr && buf->vb.bsize < size)
244 return -EINVAL;
245
246 if (STATE_NEEDS_INIT == buf->vb.state) {
247 buf->vb.width = dev->ts_packet_size;
248 buf->vb.height = dev->ts_packet_count;
249 buf->vb.size = size;
31629424 250 buf->vb.field = field /*V4L2_FIELD_TOP*/;
1da177e4 251
c7b0ac05 252 if (0 != (rc = videobuf_iolock(q,&buf->vb,NULL)))
1da177e4
LT		 253 goto fail;
254 cx88_risc_databuffer(dev->pci, &buf->risc,
255 buf->vb.dma.sglist,
256 buf->vb.width, buf->vb.height);
257 }
258 buf->vb.state = STATE_PREPARED;
259 return 0;
260
261 fail:
c7b0ac05 262 cx88_free_buffer(q,buf);
1da177e4
LT		 263 return rc;
264}
265
266void cx8802_buf_queue(struct cx8802_dev *dev, struct cx88_buffer *buf)
267{
268 struct cx88_buffer *prev;
c7b0ac05 269 struct cx88_dmaqueue *cx88q = &dev->mpegq;
1da177e4 270
b45009b0 271 dprintk( 1, "cx8802_buf_queue\n" );
1da177e4
LT		 272 /* add jump to stopper */
273 buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP | RISC_IRQ1 | RISC_CNT_INC);
c7b0ac05 274 buf->risc.jmp[1] = cpu_to_le32(cx88q->stopper.dma);
1da177e4 275
c7b0ac05 276 if (list_empty(&cx88q->active)) {
76d313bf 277 dprintk( 1, "queue is empty - first active\n" );
c7b0ac05
MCC		 278 list_add_tail(&buf->vb.queue,&cx88q->active);
279 cx8802_start_dma(dev, cx88q, buf);
1da177e4 280 buf->vb.state = STATE_ACTIVE;
c7b0ac05
MCC		 281 buf->count = cx88q->count++;
282 mod_timer(&cx88q->timeout, jiffies+BUFFER_TIMEOUT);
76d313bf 283 dprintk(1,"[%p/%d] %s - first active\n",
1da177e4
LT		 284 buf, buf->vb.i, __FUNCTION__);
285
286 } else {
b45009b0 287 dprintk( 1, "queue is not empty - append to active\n" );
c7b0ac05
MCC		 288 prev = list_entry(cx88q->active.prev, struct cx88_buffer, vb.queue);
289 list_add_tail(&buf->vb.queue,&cx88q->active);
1da177e4 290 buf->vb.state = STATE_ACTIVE;
c7b0ac05 291 buf->count = cx88q->count++;
1da177e4 292 prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
b45009b0 293 dprintk( 1, "[%p/%d] %s - append to active\n",
1da177e4
LT		 294 buf, buf->vb.i, __FUNCTION__);
295 }
296}
297
298/* ----------------------------------------------------------- */
299
300static void do_cancel_buffers(struct cx8802_dev *dev, char *reason, int restart)
301{
302 struct cx88_dmaqueue *q = &dev->mpegq;
303 struct cx88_buffer *buf;
304 unsigned long flags;
305
306 spin_lock_irqsave(&dev->slock,flags);
307 while (!list_empty(&q->active)) {
308 buf = list_entry(q->active.next, struct cx88_buffer, vb.queue);
309 list_del(&buf->vb.queue);
310 buf->vb.state = STATE_ERROR;
311 wake_up(&buf->vb.done);
312 dprintk(1,"[%p/%d] %s - dma=0x%08lx\n",
313 buf, buf->vb.i, reason, (unsigned long)buf->risc.dma);
314 }
315 if (restart)
b45009b0 316 {
76d313bf 317 dprintk(1, "restarting queue\n" );
1da177e4 318 cx8802_restart_queue(dev,q);
b45009b0 319 }
1da177e4
LT		 320 spin_unlock_irqrestore(&dev->slock,flags);
321}
322
323void cx8802_cancel_buffers(struct cx8802_dev *dev)
324{
325 struct cx88_dmaqueue *q = &dev->mpegq;
326
b45009b0 327 dprintk( 1, "cx8802_cancel_buffers" );
1da177e4
LT		 328 del_timer_sync(&q->timeout);
329 cx8802_stop_dma(dev);
330 do_cancel_buffers(dev,"cancel",0);
331}
332
333static void cx8802_timeout(unsigned long data)
334{
335 struct cx8802_dev *dev = (struct cx8802_dev*)data;
336
b45009b0 337 dprintk(0, "%s\n",__FUNCTION__);
1da177e4
LT		 338
339 if (debug)
340 cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH28]);
341 cx8802_stop_dma(dev);
342 do_cancel_buffers(dev,"timeout",1);
343}
344
41ef7c1e
MCC		 345static char *cx88_mpeg_irqs[32] = {
346 "ts_risci1", NULL, NULL, NULL,
347 "ts_risci2", NULL, NULL, NULL,
348 "ts_oflow", NULL, NULL, NULL,
349 "ts_sync", NULL, NULL, NULL,
350 "opc_err", "par_err", "rip_err", "pci_abort",
351 "ts_err?",
352};
353
1da177e4
LT		 354static void cx8802_mpeg_irq(struct cx8802_dev *dev)
355{
356 struct cx88_core *core = dev->core;
357 u32 status, mask, count;
358
b45009b0 359 dprintk( 1, "cx8802_mpeg_irq\n" );
1da177e4
LT		 360 status = cx_read(MO_TS_INTSTAT);
361 mask = cx_read(MO_TS_INTMSK);
362 if (0 == (status & mask))
363 return;
364
365 cx_write(MO_TS_INTSTAT, status);
41ef7c1e 366
1da177e4
LT		 367 if (debug || (status & mask & ~0xff))
368 cx88_print_irqbits(core->name, "irq mpeg ",
66623a04
MCC		 369 cx88_mpeg_irqs, ARRAY_SIZE(cx88_mpeg_irqs),
370 status, mask);
1da177e4
LT		 371
372 /* risc op code error */
373 if (status & (1 << 16)) {
374 printk(KERN_WARNING "%s: mpeg risc op code error\n",core->name);
375 cx_clear(MO_TS_DMACNTRL, 0x11);
376 cx88_sram_channel_dump(dev->core, &cx88_sram_channels[SRAM_CH28]);
377 }
378
379 /* risc1 y */
380 if (status & 0x01) {
b45009b0 381 dprintk( 1, "wake up\n" );
1da177e4
LT		 382 spin_lock(&dev->slock);
383 count = cx_read(MO_TS_GPCNT);
384 cx88_wakeup(dev->core, &dev->mpegq, count);
385 spin_unlock(&dev->slock);
386 }
387
388 /* risc2 y */
389 if (status & 0x10) {
390 spin_lock(&dev->slock);
391 cx8802_restart_queue(dev,&dev->mpegq);
392 spin_unlock(&dev->slock);
393 }
394
4ac97914
MCC		 395 /* other general errors */
396 if (status & 0x1f0100) {
b45009b0 397 dprintk( 0, "general errors: 0x%08x\n", status & 0x1f0100 );
4ac97914 398 spin_lock(&dev->slock);
1da177e4 399 cx8802_stop_dma(dev);
4ac97914
MCC		 400 cx8802_restart_queue(dev,&dev->mpegq);
401 spin_unlock(&dev->slock);
402 }
1da177e4
LT		 403}
404
b45009b0
MCC		 405#define MAX_IRQ_LOOP 10
406
7d12e780 407static irqreturn_t cx8802_irq(int irq, void *dev_id)
1da177e4
LT		 408{
409 struct cx8802_dev *dev = dev_id;
410 struct cx88_core *core = dev->core;
411 u32 status;
412 int loop, handled = 0;
413
b45009b0 414 for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
1da177e4
LT		 415 status = cx_read(MO_PCI_INTSTAT) & (core->pci_irqmask | 0x04);
416 if (0 == status)
417 goto out;
b45009b0
MCC		 418 dprintk( 1, "cx8802_irq\n" );
419 dprintk( 1, " loop: %d/%d\n", loop, MAX_IRQ_LOOP );
420 dprintk( 1, " status: %d\n", status );
1da177e4
LT		 421 handled = 1;
422 cx_write(MO_PCI_INTSTAT, status);
423
424 if (status & core->pci_irqmask)
425 cx88_core_irq(core,status);
426 if (status & 0x04)
427 cx8802_mpeg_irq(dev);
428 };
b45009b0
MCC		 429 if (MAX_IRQ_LOOP == loop) {
430 dprintk( 0, "clearing mask\n" );
1da177e4
LT		 431 printk(KERN_WARNING "%s/0: irq loop -- clearing mask\n",
432 core->name);
433 cx_write(MO_PCI_INTMSK,0);
434 }
435
436 out:
437 return IRQ_RETVAL(handled);
438}
439
440/* ----------------------------------------------------------- */
441/* exported stuff */
442
443int cx8802_init_common(struct cx8802_dev *dev)
444{
445 struct cx88_core *core = dev->core;
446 int err;
447
448 /* pci init */
449 if (pci_enable_device(dev->pci))
450 return -EIO;
451 pci_set_master(dev->pci);
aaa40cb8 452 if (!pci_dma_supported(dev->pci,DMA_32BIT_MASK)) {
1da177e4
LT		 453 printk("%s/2: Oops: no 32bit PCI DMA ???\n",dev->core->name);
454 return -EIO;
455 }
456
457 pci_read_config_byte(dev->pci, PCI_CLASS_REVISION, &dev->pci_rev);
4ac97914
MCC		 458 pci_read_config_byte(dev->pci, PCI_LATENCY_TIMER, &dev->pci_lat);
459 printk(KERN_INFO "%s/2: found at %s, rev: %d, irq: %d, "
228aef63 460 "latency: %d, mmio: 0x%llx\n", dev->core->name,
1da177e4 461 pci_name(dev->pci), dev->pci_rev, dev->pci->irq,
228aef63 462 dev->pci_lat,(unsigned long long)pci_resource_start(dev->pci,0));
1da177e4
LT		 463
464 /* initialize driver struct */
1da177e4
LT		 465 spin_lock_init(&dev->slock);
466
467 /* init dma queue */
468 INIT_LIST_HEAD(&dev->mpegq.active);
469 INIT_LIST_HEAD(&dev->mpegq.queued);
470 dev->mpegq.timeout.function = cx8802_timeout;
471 dev->mpegq.timeout.data = (unsigned long)dev;
472 init_timer(&dev->mpegq.timeout);
473 cx88_risc_stopper(dev->pci,&dev->mpegq.stopper,
474 MO_TS_DMACNTRL,0x11,0x00);
475
476 /* get irq */
477 err = request_irq(dev->pci->irq, cx8802_irq,
8076fe32 478 IRQF_SHARED | IRQF_DISABLED, dev->core->name, dev);
1da177e4
LT		 479 if (err < 0) {
480 printk(KERN_ERR "%s: can't get IRQ %d\n",
481 dev->core->name, dev->pci->irq);
482 return err;
483 }
484 cx_set(MO_PCI_INTMSK, core->pci_irqmask);
485
486 /* everything worked */
487 pci_set_drvdata(dev->pci,dev);
488 return 0;
489}
490
491void cx8802_fini_common(struct cx8802_dev *dev)
492{
b45009b0 493 dprintk( 2, "cx8802_fini_common\n" );
1da177e4
LT		 494 cx8802_stop_dma(dev);
495 pci_disable_device(dev->pci);
496
497 /* unregister stuff */
498 free_irq(dev->pci->irq, dev);
499 pci_set_drvdata(dev->pci, NULL);
500
501 /* free memory */
502 btcx_riscmem_free(dev->pci,&dev->mpegq.stopper);
503}
504
505/* ----------------------------------------------------------- */
506
507int cx8802_suspend_common(struct pci_dev *pci_dev, pm_message_t state)
508{
4ac97914 509 struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
1da177e4
LT		 510 struct cx88_core *core = dev->core;
511
512 /* stop mpeg dma */
513 spin_lock(&dev->slock);
514 if (!list_empty(&dev->mpegq.active)) {
b45009b0 515 dprintk( 2, "suspend\n" );
1da177e4
LT		 516 printk("%s: suspend mpeg\n", core->name);
517 cx8802_stop_dma(dev);
518 del_timer(&dev->mpegq.timeout);
519 }
520 spin_unlock(&dev->slock);
521
1da177e4
LT		 522 /* FIXME -- shutdown device */
523 cx88_shutdown(dev->core);
1da177e4
LT		 524
525 pci_save_state(pci_dev);
526 if (0 != pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state))) {
527 pci_disable_device(pci_dev);
528 dev->state.disabled = 1;
529 }
530 return 0;
531}
532
533int cx8802_resume_common(struct pci_dev *pci_dev)
534{
08adb9e2 535 struct cx8802_dev *dev = pci_get_drvdata(pci_dev);
1da177e4 536 struct cx88_core *core = dev->core;
08adb9e2 537 int err;
1da177e4
LT		 538
539 if (dev->state.disabled) {
08adb9e2
MCC		 540 err=pci_enable_device(pci_dev);
541 if (err) {
542 printk(KERN_ERR "%s: can't enable device\n",
543 dev->core->name);
544 return err;
545 }
1da177e4
LT		 546 dev->state.disabled = 0;
547 }
08adb9e2
MCC		 548 err=pci_set_power_state(pci_dev, PCI_D0);
549 if (err) {
550 printk(KERN_ERR "%s: can't enable device\n",
551 dev->core->name);
552 pci_disable_device(pci_dev);
553 dev->state.disabled = 1;
554
555 return err;
556 }
1da177e4
LT		 557 pci_restore_state(pci_dev);
558
1da177e4
LT		 559 /* FIXME: re-initialize hardware */
560 cx88_reset(dev->core);
1da177e4
LT		 561
562 /* restart video+vbi capture */
563 spin_lock(&dev->slock);
564 if (!list_empty(&dev->mpegq.active)) {
565 printk("%s: resume mpeg\n", core->name);
566 cx8802_restart_queue(dev,&dev->mpegq);
567 }
568 spin_unlock(&dev->slock);
569
570 return 0;
571}
572
6c5be74c
ST		 573struct cx8802_dev * cx8802_get_device(struct inode *inode)
574{
575 int minor = iminor(inode);
576 struct cx8802_dev *h = NULL;
577 struct list_head *list;
578
579 list_for_each(list,&cx8802_devlist) {
580 h = list_entry(list, struct cx8802_dev, devlist);
581 if (h->mpeg_dev->minor == minor)
582 return h;
583 }
584
585 return NULL;
586}
587
588struct cx8802_driver * cx8802_get_driver(struct cx8802_dev *dev, enum cx88_board_type btype)
589{
590 struct cx8802_dev *h = NULL;
591 struct cx8802_driver *d = NULL;
592 struct list_head *list;
593 struct list_head *list2;
594
595 list_for_each(list,&cx8802_devlist) {
596 h = list_entry(list, struct cx8802_dev, devlist);
73438263
ST		 597 if (h != dev)
598 continue;
6c5be74c
ST		 599
600 list_for_each(list2, &h->drvlist.devlist) {
601 d = list_entry(list2, struct cx8802_driver, devlist);
602
603 /* only unregister the correct driver type */
604 if (d->type_id == btype) {
605 return d;
606 }
607 }
608 }
609
610 return NULL;
611}
612
613/* Driver asked for hardware access. */
614int cx8802_request_acquire(struct cx8802_driver *drv)
615{
616 struct cx88_core *core = drv->core;
617
618 /* Fail a request for hardware if the device is busy. */
619 if (core->active_type_id != CX88_BOARD_NONE)
620 return -EBUSY;
621
622 if (drv->advise_acquire)
623 {
624 core->active_type_id = drv->type_id;
625 drv->advise_acquire(drv);
626
627 mpeg_dbg(1,"%s() Post acquire GPIO=%x\n", __FUNCTION__, cx_read(MO_GP0_IO));
628 }
629
630 return 0;
631}
632
633/* Driver asked to release hardware. */
634int cx8802_request_release(struct cx8802_driver *drv)
635{
636 struct cx88_core *core = drv->core;
637
638 if (drv->advise_release)
639 {
640 drv->advise_release(drv);
641 core->active_type_id = CX88_BOARD_NONE;
642 mpeg_dbg(1,"%s() Post release GPIO=%x\n", __FUNCTION__, cx_read(MO_GP0_IO));
643 }
644
645 return 0;
646}
647
648static int cx8802_check_driver(struct cx8802_driver *drv)
649{
650 if (drv == NULL)
651 return -ENODEV;
652
653 if ((drv->type_id != CX88_MPEG_DVB) &&
654 (drv->type_id != CX88_MPEG_BLACKBIRD))
655 return -EINVAL;
656
657 if ((drv->hw_access != CX8802_DRVCTL_SHARED) &&
658 (drv->hw_access != CX8802_DRVCTL_EXCLUSIVE))
659 return -EINVAL;
660
661 if ((drv->probe == NULL) ||
662 (drv->remove == NULL) ||
663 (drv->advise_acquire == NULL) ||
664 (drv->advise_release == NULL))
665 return -EINVAL;
666
667 return 0;
668}
669
670int cx8802_register_driver(struct cx8802_driver *drv)
671{
672 struct cx8802_dev *h;
673 struct cx8802_driver *driver;
674 struct list_head *list;
675 int err = 0, i = 0;
676
677 printk(KERN_INFO "%s() ->registering driver type=%s access=%s\n", __FUNCTION__ ,
678 drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird",
679 drv->hw_access == CX8802_DRVCTL_SHARED ? "shared" : "exclusive");
680
681 if ((err = cx8802_check_driver(drv)) != 0) {
682 printk(KERN_INFO "%s() cx8802_driver is invalid\n", __FUNCTION__ );
683 return err;
684 }
685
686 list_for_each(list,&cx8802_devlist) {
6c5be74c
ST		 687 h = list_entry(list, struct cx8802_dev, devlist);
688
689 printk(KERN_INFO "CORE %s: subsystem: %04x:%04x, board: %s [card=%d]\n",
690 h->core->name,h->pci->subsystem_vendor,
691 h->pci->subsystem_device,cx88_boards[h->core->board].name,
692 h->core->board);
693
694 /* Bring up a new struct for each driver instance */
695 driver = kzalloc(sizeof(*drv),GFP_KERNEL);
696 if (driver == NULL)
697 return -ENOMEM;
698
699 /* Snapshot of the driver registration data */
700 drv->core = h->core;
701 drv->suspend = cx8802_suspend_common;
702 drv->resume = cx8802_resume_common;
703 drv->request_acquire = cx8802_request_acquire;
704 drv->request_release = cx8802_request_release;
705 memcpy(driver, drv, sizeof(*driver));
706
707 err = drv->probe(driver);
708 if (err == 0) {
019391e4 709 i++;
6c5be74c
ST		 710 mutex_lock(&drv->core->lock);
711 list_add_tail(&driver->devlist,&h->drvlist.devlist);
712 mutex_unlock(&drv->core->lock);
713 } else {
714 printk(KERN_ERR "%s() ->probe failed err = %d\n", __FUNCTION__, err);
715 }
716
717 }
718 if (i == 0)
719 err = -ENODEV;
019391e4
ST		 720 else
721 err = 0;
6c5be74c
ST		 722
723 return err;
724}
725
726int cx8802_unregister_driver(struct cx8802_driver *drv)
727{
728 struct cx8802_dev *h;
729 struct cx8802_driver *d;
730 struct list_head *list;
731 struct list_head *list2, *q;
732 int err = 0, i = 0;
733
734 printk(KERN_INFO "%s() ->unregistering driver type=%s\n", __FUNCTION__ ,
735 drv->type_id == CX88_MPEG_DVB ? "dvb" : "blackbird");
736
737 list_for_each(list,&cx8802_devlist) {
738 i++;
739 h = list_entry(list, struct cx8802_dev, devlist);
740
741 printk(KERN_INFO "CORE %s: subsystem: %04x:%04x, board: %s [card=%d]\n",
742 h->core->name,h->pci->subsystem_vendor,
743 h->pci->subsystem_device,cx88_boards[h->core->board].name,
744 h->core->board);
745
746 list_for_each_safe(list2, q, &h->drvlist.devlist) {
747 d = list_entry(list2, struct cx8802_driver, devlist);
748
749 /* only unregister the correct driver type */
750 if (d->type_id != drv->type_id)
751 continue;
752
753 err = d->remove(d);
754 if (err == 0) {
755 mutex_lock(&drv->core->lock);
756 list_del(list2);
757 mutex_unlock(&drv->core->lock);
758 } else
759 printk(KERN_ERR "%s() ->remove failed err = %d\n", __FUNCTION__, err);
760
761 }
762
763 }
764
765 return err;
766}
767
1da177e4 768/* ----------------------------------------------------------- */
6c5be74c
ST		 769static int __devinit cx8802_probe(struct pci_dev *pci_dev,
770 const struct pci_device_id *pci_id)
771{
772 struct cx8802_dev *dev;
773 struct cx88_core *core;
774 int err;
775
776 /* general setup */
777 core = cx88_core_get(pci_dev);
778 if (NULL == core)
779 return -EINVAL;
780
781 printk("%s/2: cx2388x 8802 Driver Manager\n", core->name);
782
783 err = -ENODEV;
784 if (!cx88_boards[core->board].mpeg)
785 goto fail_core;
786
787 err = -ENOMEM;
788 dev = kzalloc(sizeof(*dev),GFP_KERNEL);
789 if (NULL == dev)
790 goto fail_core;
791 dev->pci = pci_dev;
792 dev->core = core;
793
794 err = cx8802_init_common(dev);
795 if (err != 0)
796 goto fail_free;
797
798 INIT_LIST_HEAD(&dev->drvlist.devlist);
799 list_add_tail(&dev->devlist,&cx8802_devlist);
1da177e4 800
6c5be74c
ST		 801 /* Maintain a reference so cx88-video can query the 8802 device. */
802 core->dvbdev = dev;
77b74774
MR		 803
804 /* now autoload cx88-dvb or cx88-blackbird */
805 request_modules(dev);
6c5be74c
ST		 806 return 0;
807
808 fail_free:
809 kfree(dev);
810 fail_core:
811 cx88_core_put(core,pci_dev);
812 return err;
813}
814
815static void __devexit cx8802_remove(struct pci_dev *pci_dev)
816{
817 struct cx8802_dev *dev;
818 struct cx8802_driver *h;
819 struct list_head *list;
820
821 dev = pci_get_drvdata(pci_dev);
822
823 dprintk( 1, "%s\n", __FUNCTION__);
824
825 list_for_each(list,&dev->drvlist.devlist) {
826 h = list_entry(list, struct cx8802_driver, devlist);
827 dprintk( 1, " ->driver\n");
828 if (h->remove == NULL) {
829 printk(KERN_ERR "%s .. skipping driver, no probe function\n", __FUNCTION__);
830 continue;
831 }
832 printk(KERN_INFO "%s .. Removing driver type %d\n", __FUNCTION__, h->type_id);
833 cx8802_unregister_driver(h);
834 list_del(&dev->drvlist.devlist);
835 }
836
837 /* Destroy any 8802 reference. */
838 dev->core->dvbdev = NULL;
839
840 /* common */
841 cx8802_fini_common(dev);
842 cx88_core_put(dev->core,dev->pci);
843 kfree(dev);
844}
845
846static struct pci_device_id cx8802_pci_tbl[] = {
847 {
848 .vendor = 0x14f1,
849 .device = 0x8802,
850 .subvendor = PCI_ANY_ID,
851 .subdevice = PCI_ANY_ID,
852 },{
853 /* --- end of list --- */
854 }
855};
856MODULE_DEVICE_TABLE(pci, cx8802_pci_tbl);
857
858static struct pci_driver cx8802_pci_driver = {
859 .name = "cx88-mpeg driver manager",
860 .id_table = cx8802_pci_tbl,
861 .probe = cx8802_probe,
862 .remove = __devexit_p(cx8802_remove),
863};
864
865static int cx8802_init(void)
866{
867 printk(KERN_INFO "cx2388x cx88-mpeg Driver Manager version %d.%d.%d loaded\n",
868 (CX88_VERSION_CODE >> 16) & 0xff,
869 (CX88_VERSION_CODE >> 8) & 0xff,
870 CX88_VERSION_CODE & 0xff);
871#ifdef SNAPSHOT
872 printk(KERN_INFO "cx2388x: snapshot date %04d-%02d-%02d\n",
873 SNAPSHOT/10000, (SNAPSHOT/100)%100, SNAPSHOT%100);
874#endif
875 return pci_register_driver(&cx8802_pci_driver);
876}
877
878static void cx8802_fini(void)
879{
880 pci_unregister_driver(&cx8802_pci_driver);
881}
882
883module_init(cx8802_init);
884module_exit(cx8802_fini);
1da177e4
LT		 885EXPORT_SYMBOL(cx8802_buf_prepare);
886EXPORT_SYMBOL(cx8802_buf_queue);
887EXPORT_SYMBOL(cx8802_cancel_buffers);
888
889EXPORT_SYMBOL(cx8802_init_common);
890EXPORT_SYMBOL(cx8802_fini_common);
891
6c5be74c
ST		 892EXPORT_SYMBOL(cx8802_register_driver);
893EXPORT_SYMBOL(cx8802_unregister_driver);
894EXPORT_SYMBOL(cx8802_get_device);
895EXPORT_SYMBOL(cx8802_get_driver);
1da177e4
LT		 896/* ----------------------------------------------------------- */
897/*
898 * Local variables:
899 * c-basic-offset: 8
900 * End:
b45009b0 901 * 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
1da177e4 902 */
Linux 6.x block layer and io_uring tree(s)