8834bc80a5ab575c4a54efbea1cf10fbdaddb09d
[linux-2.6.git] / drivers / staging / cx25821 / cx25821-video.c
1 /*
2  *  Driver for the Conexant CX25821 PCIe bridge
3  *
4  *  Copyright (C) 2009 Conexant Systems Inc.
5  *  Authors  <shu.lin@conexant.com>, <hiep.huynh@conexant.com>
6  *  Based on Steven Toth <stoth@linuxtv.org> cx23885 driver
7  *
8  *  This program is free software; you can redistribute it and/or modify
9  *  it under the terms of the GNU General Public License as published by
10  *  the Free Software Foundation; either version 2 of the License, or
11  *  (at your option) any later version.
12  *
13  *  This program is distributed in the hope that it will be useful,
14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16  *
17  *  GNU General Public License for more details.
18  *
19  *  You should have received a copy of the GNU General Public License
20  *  along with this program; if not, write to the Free Software
21  *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22  */
23
24 #include "cx25821-video.h"
25
26 MODULE_DESCRIPTION("v4l2 driver module for cx25821 based TV cards");
27 MODULE_AUTHOR("Steven Toth <stoth@linuxtv.org>");
28 MODULE_LICENSE("GPL");
29
30 static unsigned int video_nr[] = {[0 ... (CX25821_MAXBOARDS - 1)] = UNSET };
31 static unsigned int radio_nr[] = {[0 ... (CX25821_MAXBOARDS - 1)] = UNSET };
32
33 module_param_array(video_nr, int, NULL, 0444);
34 module_param_array(radio_nr, int, NULL, 0444);
35
36 MODULE_PARM_DESC(video_nr, "video device numbers");
37 MODULE_PARM_DESC(radio_nr, "radio device numbers");
38
39 static unsigned int video_debug = VIDEO_DEBUG;
40 module_param(video_debug, int, 0644);
41 MODULE_PARM_DESC(video_debug, "enable debug messages [video]");
42
43 static unsigned int irq_debug;
44 module_param(irq_debug, int, 0644);
45 MODULE_PARM_DESC(irq_debug, "enable debug messages [IRQ handler]");
46
47 unsigned int vid_limit = 16;
48 module_param(vid_limit, int, 0644);
49 MODULE_PARM_DESC(vid_limit, "capture memory limit in megabytes");
50
51 static void init_controls(struct cx25821_dev *dev, int chan_num);
52
53 #define FORMAT_FLAGS_PACKED       0x01
54
55 struct cx25821_fmt formats[] = {
56         {
57          .name = "8 bpp, gray",
58          .fourcc = V4L2_PIX_FMT_GREY,
59          .depth = 8,
60          .flags = FORMAT_FLAGS_PACKED,
61          }, {
62              .name = "4:1:1, packed, Y41P",
63              .fourcc = V4L2_PIX_FMT_Y41P,
64              .depth = 12,
65              .flags = FORMAT_FLAGS_PACKED,
66              }, {
67                  .name = "4:2:2, packed, YUYV",
68                  .fourcc = V4L2_PIX_FMT_YUYV,
69                  .depth = 16,
70                  .flags = FORMAT_FLAGS_PACKED,
71                  }, {
72                      .name = "4:2:2, packed, UYVY",
73                      .fourcc = V4L2_PIX_FMT_UYVY,
74                      .depth = 16,
75                      .flags = FORMAT_FLAGS_PACKED,
76                      }, {
77                          .name = "4:2:0, YUV",
78                          .fourcc = V4L2_PIX_FMT_YUV420,
79                          .depth = 12,
80                          .flags = FORMAT_FLAGS_PACKED,
81                          },
82 };
83
84 int get_format_size(void)
85 {
86         return ARRAY_SIZE(formats);
87 }
88
89 struct cx25821_fmt *format_by_fourcc(unsigned int fourcc)
90 {
91         unsigned int i;
92
93         if (fourcc == V4L2_PIX_FMT_Y41P || fourcc == V4L2_PIX_FMT_YUV411P) {
94                 return formats + 1;
95         }
96
97         for (i = 0; i < ARRAY_SIZE(formats); i++)
98                 if (formats[i].fourcc == fourcc)
99                         return formats + i;
100
101         printk(KERN_ERR "%s(0x%08x) NOT FOUND\n", __func__, fourcc);
102         return NULL;
103 }
104
105 void dump_video_queue(struct cx25821_dev *dev, struct cx25821_dmaqueue *q)
106 {
107         struct cx25821_buffer *buf;
108         struct list_head *item;
109         dprintk(1, "%s()\n", __func__);
110
111         if (!list_empty(&q->active)) {
112                 list_for_each(item, &q->active)
113                     buf = list_entry(item, struct cx25821_buffer, vb.queue);
114         }
115
116         if (!list_empty(&q->queued)) {
117                 list_for_each(item, &q->queued)
118                     buf = list_entry(item, struct cx25821_buffer, vb.queue);
119         }
120
121 }
122
123 void cx25821_video_wakeup(struct cx25821_dev *dev, struct cx25821_dmaqueue *q,
124                           u32 count)
125 {
126         struct cx25821_buffer *buf;
127         int bc;
128
129         for (bc = 0;; bc++) {
130                 if (list_empty(&q->active)) {
131                         dprintk(1, "bc=%d (=0: active empty)\n", bc);
132                         break;
133                 }
134
135                 buf =
136                     list_entry(q->active.next, struct cx25821_buffer, vb.queue);
137
138                 /* count comes from the hw and it is 16bit wide --
139                  * this trick handles wrap-arounds correctly for
140                  * up to 32767 buffers in flight... */
141                 if ((s16) (count - buf->count) < 0) {
142                         break;
143                 }
144
145                 do_gettimeofday(&buf->vb.ts);
146                 buf->vb.state = VIDEOBUF_DONE;
147                 list_del(&buf->vb.queue);
148                 wake_up(&buf->vb.done);
149         }
150
151         if (list_empty(&q->active))
152                 del_timer(&q->timeout);
153         else
154                 mod_timer(&q->timeout, jiffies + BUFFER_TIMEOUT);
155         if (bc != 1)
156                 printk(KERN_ERR "%s: %d buffers handled (should be 1)\n",
157                        __func__, bc);
158 }
159
160 #ifdef TUNER_FLAG
161 int cx25821_set_tvnorm(struct cx25821_dev *dev, v4l2_std_id norm)
162 {
163         dprintk(1, "%s(norm = 0x%08x) name: [%s]\n", __func__,
164                 (unsigned int)norm, v4l2_norm_to_name(norm));
165
166         dev->tvnorm = norm;
167
168         /* Tell the internal A/V decoder */
169         cx25821_call_all(dev, core, s_std, norm);
170
171         return 0;
172 }
173 #endif
174
175 struct video_device *cx25821_vdev_init(struct cx25821_dev *dev,
176                                        struct pci_dev *pci,
177                                        struct video_device *template,
178                                        char *type)
179 {
180         struct video_device *vfd;
181         dprintk(1, "%s()\n", __func__);
182
183         vfd = video_device_alloc();
184         if (NULL == vfd)
185                 return NULL;
186         *vfd = *template;
187         vfd->minor = -1;
188         vfd->v4l2_dev = &dev->v4l2_dev;
189         vfd->release = video_device_release;
190         snprintf(vfd->name, sizeof(vfd->name), "%s %s (%s)", dev->name, type,
191                  cx25821_boards[dev->board].name);
192         return vfd;
193 }
194
195 /*
196 static int cx25821_ctrl_query(struct v4l2_queryctrl *qctrl)
197 {
198     int i;
199
200     if (qctrl->id < V4L2_CID_BASE || qctrl->id >= V4L2_CID_LASTP1)
201         return -EINVAL;
202     for (i = 0; i < CX25821_CTLS; i++)
203         if (cx25821_ctls[i].v.id == qctrl->id)
204             break;
205     if (i == CX25821_CTLS) {
206         *qctrl = no_ctl;
207         return 0;
208     }
209     *qctrl = cx25821_ctls[i].v;
210     return 0;
211 }
212 */
213
214 // resource management
215 int res_get(struct cx25821_dev *dev, struct cx25821_fh *fh, unsigned int bit)
216 {
217         dprintk(1, "%s()\n", __func__);
218         if (fh->resources & bit)
219                 /* have it already allocated */
220                 return 1;
221
222         /* is it free? */
223         mutex_lock(&dev->lock);
224         if (dev->resources & bit) {
225                 /* no, someone else uses it */
226                 mutex_unlock(&dev->lock);
227                 return 0;
228         }
229         /* it's free, grab it */
230         fh->resources |= bit;
231         dev->resources |= bit;
232         dprintk(1, "res: get %d\n", bit);
233         mutex_unlock(&dev->lock);
234         return 1;
235 }
236
237 int res_check(struct cx25821_fh *fh, unsigned int bit)
238 {
239         return fh->resources & bit;
240 }
241
242 int res_locked(struct cx25821_dev *dev, unsigned int bit)
243 {
244         return dev->resources & bit;
245 }
246
247 void res_free(struct cx25821_dev *dev, struct cx25821_fh *fh, unsigned int bits)
248 {
249         BUG_ON((fh->resources & bits) != bits);
250         dprintk(1, "%s()\n", __func__);
251
252         mutex_lock(&dev->lock);
253         fh->resources &= ~bits;
254         dev->resources &= ~bits;
255         dprintk(1, "res: put %d\n", bits);
256         mutex_unlock(&dev->lock);
257 }
258
259 int cx25821_video_mux(struct cx25821_dev *dev, unsigned int input)
260 {
261         struct v4l2_routing route;
262         memset(&route, 0, sizeof(route));
263
264         dprintk(1, "%s() video_mux: %d [vmux=%d, gpio=0x%x,0x%x,0x%x,0x%x]\n",
265                 __func__, input, INPUT(input)->vmux, INPUT(input)->gpio0,
266                 INPUT(input)->gpio1, INPUT(input)->gpio2, INPUT(input)->gpio3);
267         dev->input = input;
268
269         route.input = INPUT(input)->vmux;
270
271         /* Tell the internal A/V decoder */
272         cx25821_call_all(dev, video, s_routing, INPUT(input)->vmux, 0, 0);
273
274         return 0;
275 }
276
277 int cx25821_start_video_dma(struct cx25821_dev *dev,
278                             struct cx25821_dmaqueue *q,
279                             struct cx25821_buffer *buf,
280                             struct sram_channel *channel)
281 {
282         int tmp = 0;
283
284         /* setup fifo + format */
285         cx25821_sram_channel_setup(dev, channel, buf->bpl, buf->risc.dma);
286
287         /* reset counter */
288         cx_write(channel->gpcnt_ctl, 3);
289         q->count = 1;
290
291         /* enable irq */
292         cx_set(PCI_INT_MSK, cx_read(PCI_INT_MSK) | (1 << channel->i));
293         cx_set(channel->int_msk, 0x11);
294
295         /* start dma */
296         cx_write(channel->dma_ctl, 0x11);       /* FIFO and RISC enable */
297
298         /* make sure upstream setting if any is reversed */
299         tmp = cx_read(VID_CH_MODE_SEL);
300         cx_write(VID_CH_MODE_SEL, tmp & 0xFFFFFE00);
301
302         return 0;
303 }
304
305 int cx25821_restart_video_queue(struct cx25821_dev *dev,
306                                 struct cx25821_dmaqueue *q,
307                                 struct sram_channel *channel)
308 {
309         struct cx25821_buffer *buf, *prev;
310         struct list_head *item;
311
312         if (!list_empty(&q->active)) {
313                 buf =
314                     list_entry(q->active.next, struct cx25821_buffer, vb.queue);
315
316                 cx25821_start_video_dma(dev, q, buf, channel);
317
318                 list_for_each(item, &q->active) {
319                         buf = list_entry(item, struct cx25821_buffer, vb.queue);
320                         buf->count = q->count++;
321                 }
322
323                 mod_timer(&q->timeout, jiffies + BUFFER_TIMEOUT);
324                 return 0;
325         }
326
327         prev = NULL;
328         for (;;) {
329                 if (list_empty(&q->queued))
330                         return 0;
331
332                 buf =
333                     list_entry(q->queued.next, struct cx25821_buffer, vb.queue);
334
335                 if (NULL == prev) {
336                         list_move_tail(&buf->vb.queue, &q->active);
337                         cx25821_start_video_dma(dev, q, buf, channel);
338                         buf->vb.state = VIDEOBUF_ACTIVE;
339                         buf->count = q->count++;
340                         mod_timer(&q->timeout, jiffies + BUFFER_TIMEOUT);
341                 } else if (prev->vb.width == buf->vb.width &&
342                            prev->vb.height == buf->vb.height &&
343                            prev->fmt == buf->fmt) {
344                         list_move_tail(&buf->vb.queue, &q->active);
345                         buf->vb.state = VIDEOBUF_ACTIVE;
346                         buf->count = q->count++;
347                         prev->risc.jmp[1] = cpu_to_le32(buf->risc.dma);
348                         prev->risc.jmp[2] = cpu_to_le32(0);     /* Bits 63 - 32 */
349                 } else {
350                         return 0;
351                 }
352                 prev = buf;
353         }
354 }
355
356 void cx25821_vid_timeout(unsigned long data)
357 {
358         struct cx25821_data *timeout_data = (struct cx25821_data *)data;
359         struct cx25821_dev *dev = timeout_data->dev;
360         struct sram_channel *channel = timeout_data->channel;
361         struct cx25821_dmaqueue *q = &dev->vidq[channel->i];
362         struct cx25821_buffer *buf;
363         unsigned long flags;
364
365         //cx25821_sram_channel_dump(dev, channel);
366         cx_clear(channel->dma_ctl, 0x11);
367
368         spin_lock_irqsave(&dev->slock, flags);
369         while (!list_empty(&q->active)) {
370                 buf =
371                     list_entry(q->active.next, struct cx25821_buffer, vb.queue);
372                 list_del(&buf->vb.queue);
373
374                 buf->vb.state = VIDEOBUF_ERROR;
375                 wake_up(&buf->vb.done);
376         }
377
378         cx25821_restart_video_queue(dev, q, channel);
379         spin_unlock_irqrestore(&dev->slock, flags);
380 }
381
382 int cx25821_video_irq(struct cx25821_dev *dev, int chan_num, u32 status)
383 {
384         u32 count = 0;
385         int handled = 0;
386         u32 mask;
387         struct sram_channel *channel = &dev->sram_channels[chan_num];
388
389         mask = cx_read(channel->int_msk);
390         if (0 == (status & mask))
391                 return handled;
392
393         cx_write(channel->int_stat, status);
394
395         /* risc op code error */
396         if (status & (1 << 16)) {
397                 printk(KERN_WARNING "%s, %s: video risc op code error\n",
398                        dev->name, channel->name);
399                 cx_clear(channel->dma_ctl, 0x11);
400                 cx25821_sram_channel_dump(dev, channel);
401         }
402
403         /* risc1 y */
404         if (status & FLD_VID_DST_RISC1) {
405                 spin_lock(&dev->slock);
406                 count = cx_read(channel->gpcnt);
407                 cx25821_video_wakeup(dev, &dev->vidq[channel->i], count);
408                 spin_unlock(&dev->slock);
409                 handled++;
410         }
411
412         /* risc2 y */
413         if (status & 0x10) {
414                 dprintk(2, "stopper video\n");
415                 spin_lock(&dev->slock);
416                 cx25821_restart_video_queue(dev, &dev->vidq[channel->i],
417                                             channel);
418                 spin_unlock(&dev->slock);
419                 handled++;
420         }
421         return handled;
422 }
423
424 void cx25821_videoioctl_unregister(struct cx25821_dev *dev)
425 {
426         if (dev->ioctl_dev) {
427                 if (dev->ioctl_dev->minor != -1)
428                         video_unregister_device(dev->ioctl_dev);
429                 else
430                         video_device_release(dev->ioctl_dev);
431
432                 dev->ioctl_dev = NULL;
433         }
434 }
435
436 void cx25821_video_unregister(struct cx25821_dev *dev, int chan_num)
437 {
438         cx_clear(PCI_INT_MSK, 1);
439
440         if (dev->video_dev[chan_num]) {
441                 if (-1 != dev->video_dev[chan_num]->minor)
442                         video_unregister_device(dev->video_dev[chan_num]);
443                 else
444                         video_device_release(dev->video_dev[chan_num]);
445
446                 dev->video_dev[chan_num] = NULL;
447
448                 btcx_riscmem_free(dev->pci, &dev->vidq[chan_num].stopper);
449
450                 printk(KERN_WARNING "device %d released!\n", chan_num);
451         }
452
453 }
454
455 int cx25821_video_register(struct cx25821_dev *dev, int chan_num,
456                            struct video_device *video_template)
457 {
458         int err;
459
460         spin_lock_init(&dev->slock);
461
462         //printk(KERN_WARNING "Channel %d\n", chan_num);
463
464 #ifdef TUNER_FLAG
465         dev->tvnorm = video_template->current_norm;
466 #endif
467
468         /* init video dma queues */
469         dev->timeout_data[chan_num].dev = dev;
470         dev->timeout_data[chan_num].channel = &dev->sram_channels[chan_num];
471         INIT_LIST_HEAD(&dev->vidq[chan_num].active);
472         INIT_LIST_HEAD(&dev->vidq[chan_num].queued);
473         dev->vidq[chan_num].timeout.function = cx25821_vid_timeout;
474         dev->vidq[chan_num].timeout.data =
475             (unsigned long)&dev->timeout_data[chan_num];
476         init_timer(&dev->vidq[chan_num].timeout);
477         cx25821_risc_stopper(dev->pci, &dev->vidq[chan_num].stopper,
478                              dev->sram_channels[chan_num].dma_ctl, 0x11, 0);
479
480         /* register v4l devices */
481         dev->video_dev[chan_num] =
482             cx25821_vdev_init(dev, dev->pci, video_template, "video");
483         err =
484             video_register_device(dev->video_dev[chan_num], VFL_TYPE_GRABBER,
485                                   video_nr[dev->nr]);
486
487         if (err < 0) {
488                 goto fail_unreg;
489         }
490         //set PCI interrupt
491         cx_set(PCI_INT_MSK, 0xff);
492
493         /* initial device configuration */
494         mutex_lock(&dev->lock);
495 #ifdef TUNER_FLAG
496         cx25821_set_tvnorm(dev, dev->tvnorm);
497 #endif
498         mutex_unlock(&dev->lock);
499
500         init_controls(dev, chan_num);
501
502         return 0;
503
504       fail_unreg:
505         cx25821_video_unregister(dev, chan_num);
506         return err;
507 }
508
509 int buffer_setup(struct videobuf_queue *q, unsigned int *count,
510                  unsigned int *size)
511 {
512         struct cx25821_fh *fh = q->priv_data;
513
514         *size = fh->fmt->depth * fh->width * fh->height >> 3;
515
516         if (0 == *count)
517                 *count = 32;
518
519         while (*size * *count > vid_limit * 1024 * 1024)
520                 (*count)--;
521
522         return 0;
523 }
524
525 int buffer_prepare(struct videobuf_queue *q, struct videobuf_buffer *vb,
526                    enum v4l2_field field)
527 {
528         struct cx25821_fh *fh = q->priv_data;
529         struct cx25821_dev *dev = fh->dev;
530         struct cx25821_buffer *buf =
531             container_of(vb, struct cx25821_buffer, vb);
532         int rc, init_buffer = 0;
533         u32 line0_offset, line1_offset;
534         struct videobuf_dmabuf *dma = videobuf_to_dma(&buf->vb);
535         int bpl_local = LINE_SIZE_D1;
536         int channel_opened = 0;
537
538         BUG_ON(NULL == fh->fmt);
539         if (fh->width < 48 || fh->width > 720 ||
540             fh->height < 32 || fh->height > 576)
541                 return -EINVAL;
542
543         buf->vb.size = (fh->width * fh->height * fh->fmt->depth) >> 3;
544
545         if (0 != buf->vb.baddr && buf->vb.bsize < buf->vb.size)
546                 return -EINVAL;
547
548         if (buf->fmt != fh->fmt ||
549             buf->vb.width != fh->width ||
550             buf->vb.height != fh->height || buf->vb.field != field) {
551                 buf->fmt = fh->fmt;
552                 buf->vb.width = fh->width;
553                 buf->vb.height = fh->height;
554                 buf->vb.field = field;
555                 init_buffer = 1;
556         }
557
558         if (VIDEOBUF_NEEDS_INIT == buf->vb.state) {
559                 init_buffer = 1;
560                 rc = videobuf_iolock(q, &buf->vb, NULL);
561                 if (0 != rc) {
562                         printk(KERN_DEBUG "videobuf_iolock failed!\n");
563                         goto fail;
564                 }
565         }
566
567         dprintk(1, "init_buffer=%d\n", init_buffer);
568
569         if (init_buffer) {
570
571                 channel_opened = dev->channel_opened;
572                 channel_opened = (channel_opened < 0
573                                   || channel_opened > 7) ? 7 : channel_opened;
574
575                 if (dev->pixel_formats[channel_opened] == PIXEL_FRMT_411)
576                         buf->bpl = (buf->fmt->depth * buf->vb.width) >> 3;
577                 else
578                         buf->bpl = (buf->fmt->depth >> 3) * (buf->vb.width);
579
580                 if (dev->pixel_formats[channel_opened] == PIXEL_FRMT_411) {
581                         bpl_local = buf->bpl;
582                 } else {
583                         bpl_local = buf->bpl;   //Default
584
585                         if (channel_opened >= 0 && channel_opened <= 7) {
586                                 if (dev->use_cif_resolution[channel_opened]) {
587                                         if (dev->tvnorm & V4L2_STD_PAL_BG
588                                             || dev->tvnorm & V4L2_STD_PAL_DK)
589                                                 bpl_local = 352 << 1;
590                                         else
591                                                 bpl_local =
592                                                     dev->
593                                                     cif_width[channel_opened] <<
594                                                     1;
595                                 }
596                         }
597                 }
598
599                 switch (buf->vb.field) {
600                 case V4L2_FIELD_TOP:
601                         cx25821_risc_buffer(dev->pci, &buf->risc,
602                                             dma->sglist, 0, UNSET,
603                                             buf->bpl, 0, buf->vb.height);
604                         break;
605                 case V4L2_FIELD_BOTTOM:
606                         cx25821_risc_buffer(dev->pci, &buf->risc,
607                                             dma->sglist, UNSET, 0,
608                                             buf->bpl, 0, buf->vb.height);
609                         break;
610                 case V4L2_FIELD_INTERLACED:
611                         /* All other formats are top field first */
612                         line0_offset = 0;
613                         line1_offset = buf->bpl;
614                         dprintk(1, "top field first\n");
615
616                         cx25821_risc_buffer(dev->pci, &buf->risc,
617                                             dma->sglist, line0_offset,
618                                             bpl_local, bpl_local, bpl_local,
619                                             buf->vb.height >> 1);
620                         break;
621                 case V4L2_FIELD_SEQ_TB:
622                         cx25821_risc_buffer(dev->pci, &buf->risc,
623                                             dma->sglist,
624                                             0, buf->bpl * (buf->vb.height >> 1),
625                                             buf->bpl, 0, buf->vb.height >> 1);
626                         break;
627                 case V4L2_FIELD_SEQ_BT:
628                         cx25821_risc_buffer(dev->pci, &buf->risc,
629                                             dma->sglist,
630                                             buf->bpl * (buf->vb.height >> 1), 0,
631                                             buf->bpl, 0, buf->vb.height >> 1);
632                         break;
633                 default:
634                         BUG();
635                 }
636         }
637
638         dprintk(2, "[%p/%d] buffer_prep - %dx%d %dbpp \"%s\" - dma=0x%08lx\n",
639                 buf, buf->vb.i, fh->width, fh->height, fh->fmt->depth,
640                 fh->fmt->name, (unsigned long)buf->risc.dma);
641
642         buf->vb.state = VIDEOBUF_PREPARED;
643
644         return 0;
645
646       fail:
647         cx25821_free_buffer(q, buf);
648         return rc;
649 }
650
651 void buffer_release(struct videobuf_queue *q, struct videobuf_buffer *vb)
652 {
653         struct cx25821_buffer *buf =
654             container_of(vb, struct cx25821_buffer, vb);
655
656         cx25821_free_buffer(q, buf);
657 }
658
659 struct videobuf_queue *get_queue(struct cx25821_fh *fh)
660 {
661         switch (fh->type) {
662         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
663                 return &fh->vidq;
664         default:
665                 BUG();
666                 return NULL;
667         }
668 }
669
670 int get_resource(struct cx25821_fh *fh, int resource)
671 {
672         switch (fh->type) {
673         case V4L2_BUF_TYPE_VIDEO_CAPTURE:
674                 return resource;
675         default:
676                 BUG();
677                 return 0;
678         }
679 }
680
681 int video_mmap(struct file *file, struct vm_area_struct *vma)
682 {
683         struct cx25821_fh *fh = file->private_data;
684
685         return videobuf_mmap_mapper(get_queue(fh), vma);
686 }
687
688 /* VIDEO IOCTLS                                                       */
689 int vidioc_g_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f)
690 {
691         struct cx25821_fh *fh = priv;
692
693         f->fmt.pix.width = fh->width;
694         f->fmt.pix.height = fh->height;
695         f->fmt.pix.field = fh->vidq.field;
696         f->fmt.pix.pixelformat = fh->fmt->fourcc;
697         f->fmt.pix.bytesperline = (f->fmt.pix.width * fh->fmt->depth) >> 3;
698         f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
699
700         return 0;
701 }
702
703 int vidioc_try_fmt_vid_cap(struct file *file, void *priv, struct v4l2_format *f)
704 {
705         struct cx25821_fmt *fmt;
706         enum v4l2_field field;
707         unsigned int maxw, maxh;
708
709         fmt = format_by_fourcc(f->fmt.pix.pixelformat);
710         if (NULL == fmt)
711                 return -EINVAL;
712
713         field = f->fmt.pix.field;
714         maxw = 720;
715         maxh = 576;
716
717         if (V4L2_FIELD_ANY == field) {
718                 field = (f->fmt.pix.height > maxh / 2)
719                     ? V4L2_FIELD_INTERLACED : V4L2_FIELD_TOP;
720         }
721
722         switch (field) {
723         case V4L2_FIELD_TOP:
724         case V4L2_FIELD_BOTTOM:
725                 maxh = maxh / 2;
726                 break;
727         case V4L2_FIELD_INTERLACED:
728                 break;
729         default:
730                 return -EINVAL;
731         }
732
733         f->fmt.pix.field = field;
734         if (f->fmt.pix.height < 32)
735                 f->fmt.pix.height = 32;
736         if (f->fmt.pix.height > maxh)
737                 f->fmt.pix.height = maxh;
738         if (f->fmt.pix.width < 48)
739                 f->fmt.pix.width = 48;
740         if (f->fmt.pix.width > maxw)
741                 f->fmt.pix.width = maxw;
742         f->fmt.pix.width &= ~0x03;
743         f->fmt.pix.bytesperline = (f->fmt.pix.width * fmt->depth) >> 3;
744         f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
745
746         return 0;
747 }
748
749 int vidioc_querycap(struct file *file, void *priv, struct v4l2_capability *cap)
750 {
751         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
752
753         strcpy(cap->driver, "cx25821");
754         strlcpy(cap->card, cx25821_boards[dev->board].name, sizeof(cap->card));
755         sprintf(cap->bus_info, "PCIe:%s", pci_name(dev->pci));
756         cap->version = CX25821_VERSION_CODE;
757         cap->capabilities =
758             V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE | V4L2_CAP_STREAMING;
759         if (UNSET != dev->tuner_type)
760                 cap->capabilities |= V4L2_CAP_TUNER;
761         return 0;
762 }
763
764 int vidioc_enum_fmt_vid_cap(struct file *file, void *priv,
765                             struct v4l2_fmtdesc *f)
766 {
767         if (unlikely(f->index >= ARRAY_SIZE(formats)))
768                 return -EINVAL;
769
770         strlcpy(f->description, formats[f->index].name, sizeof(f->description));
771         f->pixelformat = formats[f->index].fourcc;
772
773         return 0;
774 }
775
776 #ifdef CONFIG_VIDEO_V4L1_COMPAT
777 int vidiocgmbuf(struct file *file, void *priv, struct video_mbuf *mbuf)
778 {
779         struct cx25821_fh *fh = priv;
780         struct videobuf_queue *q;
781         struct v4l2_requestbuffers req;
782         unsigned int i;
783         int err;
784
785         q = get_queue(fh);
786         memset(&req, 0, sizeof(req));
787         req.type = q->type;
788         req.count = 8;
789         req.memory = V4L2_MEMORY_MMAP;
790         err = videobuf_reqbufs(q, &req);
791         if (err < 0)
792                 return err;
793
794         mbuf->frames = req.count;
795         mbuf->size = 0;
796         for (i = 0; i < mbuf->frames; i++) {
797                 mbuf->offsets[i] = q->bufs[i]->boff;
798                 mbuf->size += q->bufs[i]->bsize;
799         }
800         return 0;
801 }
802 #endif
803
804 int vidioc_reqbufs(struct file *file, void *priv, struct v4l2_requestbuffers *p)
805 {
806         struct cx25821_fh *fh = priv;
807         return videobuf_reqbufs(get_queue(fh), p);
808 }
809
810 int vidioc_querybuf(struct file *file, void *priv, struct v4l2_buffer *p)
811 {
812         struct cx25821_fh *fh = priv;
813         return videobuf_querybuf(get_queue(fh), p);
814 }
815
816 int vidioc_qbuf(struct file *file, void *priv, struct v4l2_buffer *p)
817 {
818         struct cx25821_fh *fh = priv;
819         return videobuf_qbuf(get_queue(fh), p);
820 }
821
822 int vidioc_g_priority(struct file *file, void *f, enum v4l2_priority *p)
823 {
824         struct cx25821_dev *dev = ((struct cx25821_fh *)f)->dev;
825
826         *p = v4l2_prio_max(&dev->prio);
827
828         return 0;
829 }
830
831 int vidioc_s_priority(struct file *file, void *f, enum v4l2_priority prio)
832 {
833         struct cx25821_fh *fh = f;
834         struct cx25821_dev *dev = ((struct cx25821_fh *)f)->dev;
835
836         return v4l2_prio_change(&dev->prio, &fh->prio, prio);
837 }
838
839 #ifdef TUNER_FLAG
840 int vidioc_s_std(struct file *file, void *priv, v4l2_std_id * tvnorms)
841 {
842         struct cx25821_fh *fh = priv;
843         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
844         int err;
845
846         dprintk(1, "%s()\n", __func__);
847
848         if (fh) {
849                 err = v4l2_prio_check(&dev->prio, &fh->prio);
850                 if (0 != err)
851                         return err;
852         }
853
854         if (dev->tvnorm == *tvnorms) {
855                 return 0;
856         }
857
858         mutex_lock(&dev->lock);
859         cx25821_set_tvnorm(dev, *tvnorms);
860         mutex_unlock(&dev->lock);
861
862         medusa_set_videostandard(dev);
863
864         return 0;
865 }
866 #endif
867
868 int cx25821_enum_input(struct cx25821_dev *dev, struct v4l2_input *i)
869 {
870         static const char *iname[] = {
871                 [CX25821_VMUX_COMPOSITE] = "Composite",
872                 [CX25821_VMUX_SVIDEO] = "S-Video",
873                 [CX25821_VMUX_DEBUG] = "for debug only",
874         };
875         unsigned int n;
876         dprintk(1, "%s()\n", __func__);
877
878         n = i->index;
879         if (n > 2)
880                 return -EINVAL;
881
882         if (0 == INPUT(n)->type)
883                 return -EINVAL;
884
885         memset(i, 0, sizeof(*i));
886         i->index = n;
887         i->type = V4L2_INPUT_TYPE_CAMERA;
888         strcpy(i->name, iname[INPUT(n)->type]);
889
890         i->std = CX25821_NORMS;
891         return 0;
892 }
893
894 int vidioc_enum_input(struct file *file, void *priv, struct v4l2_input *i)
895 {
896         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
897         dprintk(1, "%s()\n", __func__);
898         return cx25821_enum_input(dev, i);
899 }
900
901 int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
902 {
903         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
904
905         *i = dev->input;
906         dprintk(1, "%s() returns %d\n", __func__, *i);
907         return 0;
908 }
909
910 int vidioc_s_input(struct file *file, void *priv, unsigned int i)
911 {
912         struct cx25821_fh *fh = priv;
913         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
914         int err;
915
916         dprintk(1, "%s(%d)\n", __func__, i);
917
918         if (fh) {
919                 err = v4l2_prio_check(&dev->prio, &fh->prio);
920                 if (0 != err)
921                         return err;
922         }
923
924         if (i > 2) {
925                 dprintk(1, "%s() -EINVAL\n", __func__);
926                 return -EINVAL;
927         }
928
929         mutex_lock(&dev->lock);
930         cx25821_video_mux(dev, i);
931         mutex_unlock(&dev->lock);
932         return 0;
933 }
934
935 #ifdef TUNER_FLAG
936 int vidioc_g_frequency(struct file *file, void *priv, struct v4l2_frequency *f)
937 {
938         struct cx25821_fh *fh = priv;
939         struct cx25821_dev *dev = fh->dev;
940
941         f->frequency = dev->freq;
942
943         cx25821_call_all(dev, tuner, g_frequency, f);
944
945         return 0;
946 }
947
948 int cx25821_set_freq(struct cx25821_dev *dev, struct v4l2_frequency *f)
949 {
950         mutex_lock(&dev->lock);
951         dev->freq = f->frequency;
952
953         cx25821_call_all(dev, tuner, s_frequency, f);
954
955         /* When changing channels it is required to reset TVAUDIO */
956         msleep(10);
957
958         mutex_unlock(&dev->lock);
959
960         return 0;
961 }
962
963 int vidioc_s_frequency(struct file *file, void *priv, struct v4l2_frequency *f)
964 {
965         struct cx25821_fh *fh = priv;
966         struct cx25821_dev *dev = fh->dev;
967         int err;
968
969         if (fh) {
970                 err = v4l2_prio_check(&dev->prio, &fh->prio);
971                 if (0 != err)
972                         return err;
973         }
974
975         return cx25821_set_freq(dev, f);
976 }
977 #endif
978
979 #ifdef CONFIG_VIDEO_ADV_DEBUG
980 int vidioc_g_register(struct file *file, void *fh,
981                       struct v4l2_dbg_register *reg)
982 {
983         struct cx25821_dev *dev = ((struct cx25821_fh *)fh)->dev;
984
985         if (!v4l2_chip_match_host(&reg->match))
986                 return -EINVAL;
987
988         cx25821_call_all(dev, core, g_register, reg);
989
990         return 0;
991 }
992
993 int vidioc_s_register(struct file *file, void *fh,
994                       struct v4l2_dbg_register *reg)
995 {
996         struct cx25821_dev *dev = ((struct cx25821_fh *)fh)->dev;
997
998         if (!v4l2_chip_match_host(&reg->match))
999                 return -EINVAL;
1000
1001         cx25821_call_all(dev, core, s_register, reg);
1002
1003         return 0;
1004 }
1005
1006 #endif
1007
1008 #ifdef TUNER_FLAG
1009 int vidioc_g_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
1010 {
1011         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
1012
1013         if (unlikely(UNSET == dev->tuner_type))
1014                 return -EINVAL;
1015         if (0 != t->index)
1016                 return -EINVAL;
1017
1018         strcpy(t->name, "Television");
1019         t->type = V4L2_TUNER_ANALOG_TV;
1020         t->capability = V4L2_TUNER_CAP_NORM;
1021         t->rangehigh = 0xffffffffUL;
1022
1023         t->signal = 0xffff;     /* LOCKED */
1024         return 0;
1025 }
1026
1027 int vidioc_s_tuner(struct file *file, void *priv, struct v4l2_tuner *t)
1028 {
1029         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
1030         struct cx25821_fh *fh = priv;
1031         int err;
1032
1033         if (fh) {
1034                 err = v4l2_prio_check(&dev->prio, &fh->prio);
1035                 if (0 != err)
1036                         return err;
1037         }
1038
1039         dprintk(1, "%s()\n", __func__);
1040         if (UNSET == dev->tuner_type)
1041                 return -EINVAL;
1042         if (0 != t->index)
1043                 return -EINVAL;
1044
1045         return 0;
1046 }
1047
1048 #endif
1049 // ******************************************************************************************
1050 static const struct v4l2_queryctrl no_ctl = {
1051         .name = "42",
1052         .flags = V4L2_CTRL_FLAG_DISABLED,
1053 };
1054
1055 static struct v4l2_queryctrl cx25821_ctls[] = {
1056         /* --- video --- */
1057         {
1058          .id = V4L2_CID_BRIGHTNESS,
1059          .name = "Brightness",
1060          .minimum = 0,
1061          .maximum = 10000,
1062          .step = 1,
1063          .default_value = 6200,
1064          .type = V4L2_CTRL_TYPE_INTEGER,
1065          }, {
1066              .id = V4L2_CID_CONTRAST,
1067              .name = "Contrast",
1068              .minimum = 0,
1069              .maximum = 10000,
1070              .step = 1,
1071              .default_value = 5000,
1072              .type = V4L2_CTRL_TYPE_INTEGER,
1073              }, {
1074                  .id = V4L2_CID_SATURATION,
1075                  .name = "Saturation",
1076                  .minimum = 0,
1077                  .maximum = 10000,
1078                  .step = 1,
1079                  .default_value = 5000,
1080                  .type = V4L2_CTRL_TYPE_INTEGER,
1081                  }, {
1082                      .id = V4L2_CID_HUE,
1083                      .name = "Hue",
1084                      .minimum = 0,
1085                      .maximum = 10000,
1086                      .step = 1,
1087                      .default_value = 5000,
1088                      .type = V4L2_CTRL_TYPE_INTEGER,
1089                      }
1090 };
1091 static const int CX25821_CTLS = ARRAY_SIZE(cx25821_ctls);
1092
1093 static int cx25821_ctrl_query(struct v4l2_queryctrl *qctrl)
1094 {
1095         int i;
1096
1097         if (qctrl->id < V4L2_CID_BASE || qctrl->id >= V4L2_CID_LASTP1)
1098                 return -EINVAL;
1099         for (i = 0; i < CX25821_CTLS; i++)
1100                 if (cx25821_ctls[i].id == qctrl->id)
1101                         break;
1102         if (i == CX25821_CTLS) {
1103                 *qctrl = no_ctl;
1104                 return 0;
1105         }
1106         *qctrl = cx25821_ctls[i];
1107         return 0;
1108 }
1109
1110 int vidioc_queryctrl(struct file *file, void *priv,
1111                      struct v4l2_queryctrl *qctrl)
1112 {
1113         return cx25821_ctrl_query(qctrl);
1114 }
1115
1116 /* ------------------------------------------------------------------ */
1117 /* VIDEO CTRL IOCTLS                                                  */
1118
1119 static const struct v4l2_queryctrl *ctrl_by_id(unsigned int id)
1120 {
1121         unsigned int i;
1122
1123         for (i = 0; i < CX25821_CTLS; i++)
1124                 if (cx25821_ctls[i].id == id)
1125                         return cx25821_ctls + i;
1126         return NULL;
1127 }
1128
1129 int vidioc_g_ctrl(struct file *file, void *priv, struct v4l2_control *ctl)
1130 {
1131         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
1132
1133         const struct v4l2_queryctrl *ctrl;
1134
1135         ctrl = ctrl_by_id(ctl->id);
1136
1137         if (NULL == ctrl)
1138                 return -EINVAL;
1139         switch (ctl->id) {
1140         case V4L2_CID_BRIGHTNESS:
1141                 ctl->value = dev->ctl_bright;
1142                 break;
1143         case V4L2_CID_HUE:
1144                 ctl->value = dev->ctl_hue;
1145                 break;
1146         case V4L2_CID_CONTRAST:
1147                 ctl->value = dev->ctl_contrast;
1148                 break;
1149         case V4L2_CID_SATURATION:
1150                 ctl->value = dev->ctl_saturation;
1151                 break;
1152         }
1153         return 0;
1154 }
1155
1156 int cx25821_set_control(struct cx25821_dev *dev,
1157                         struct v4l2_control *ctl, int chan_num)
1158 {
1159         int err;
1160         const struct v4l2_queryctrl *ctrl;
1161
1162         err = -EINVAL;
1163
1164         ctrl = ctrl_by_id(ctl->id);
1165
1166         if (NULL == ctrl)
1167                 return err;
1168
1169         switch (ctrl->type) {
1170         case V4L2_CTRL_TYPE_BOOLEAN:
1171         case V4L2_CTRL_TYPE_MENU:
1172         case V4L2_CTRL_TYPE_INTEGER:
1173                 if (ctl->value < ctrl->minimum)
1174                         ctl->value = ctrl->minimum;
1175                 if (ctl->value > ctrl->maximum)
1176                         ctl->value = ctrl->maximum;
1177                 break;
1178         default:
1179                 /* nothing */ ;
1180         };
1181
1182         switch (ctl->id) {
1183         case V4L2_CID_BRIGHTNESS:
1184                 dev->ctl_bright = ctl->value;
1185                 medusa_set_brightness(dev, ctl->value, chan_num);
1186                 break;
1187         case V4L2_CID_HUE:
1188                 dev->ctl_hue = ctl->value;
1189                 medusa_set_hue(dev, ctl->value, chan_num);
1190                 break;
1191         case V4L2_CID_CONTRAST:
1192                 dev->ctl_contrast = ctl->value;
1193                 medusa_set_contrast(dev, ctl->value, chan_num);
1194                 break;
1195         case V4L2_CID_SATURATION:
1196                 dev->ctl_saturation = ctl->value;
1197                 medusa_set_saturation(dev, ctl->value, chan_num);
1198                 break;
1199         }
1200
1201         err = 0;
1202
1203         return err;
1204 }
1205
1206 static void init_controls(struct cx25821_dev *dev, int chan_num)
1207 {
1208         struct v4l2_control ctrl;
1209         int i;
1210         for (i = 0; i < CX25821_CTLS; i++) {
1211                 ctrl.id = cx25821_ctls[i].id;
1212                 ctrl.value = cx25821_ctls[i].default_value;
1213
1214                 cx25821_set_control(dev, &ctrl, chan_num);
1215         }
1216 }
1217
1218 int vidioc_cropcap(struct file *file, void *priv, struct v4l2_cropcap *cropcap)
1219 {
1220         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
1221
1222         if (cropcap->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
1223                 return -EINVAL;
1224         cropcap->bounds.top = cropcap->bounds.left = 0;
1225         cropcap->bounds.width = 720;
1226         cropcap->bounds.height = dev->tvnorm == V4L2_STD_PAL_BG ? 576 : 480;
1227         cropcap->pixelaspect.numerator =
1228             dev->tvnorm == V4L2_STD_PAL_BG ? 59 : 10;
1229         cropcap->pixelaspect.denominator =
1230             dev->tvnorm == V4L2_STD_PAL_BG ? 54 : 11;
1231         cropcap->defrect = cropcap->bounds;
1232         return 0;
1233 }
1234
1235 int vidioc_s_crop(struct file *file, void *priv, struct v4l2_crop *crop)
1236 {
1237         struct cx25821_dev *dev = ((struct cx25821_fh *)priv)->dev;
1238         struct cx25821_fh *fh = priv;
1239         int err;
1240
1241         if (fh) {
1242                 err = v4l2_prio_check(&dev->prio, &fh->prio);
1243                 if (0 != err)
1244                         return err;
1245         }
1246         // vidioc_s_crop not supported
1247         return -EINVAL;
1248 }
1249
1250 int vidioc_g_crop(struct file *file, void *priv, struct v4l2_crop *crop)
1251 {
1252         // vidioc_g_crop not supported
1253         return -EINVAL;
1254 }
1255
1256 int vidioc_querystd(struct file *file, void *priv, v4l2_std_id * norm)
1257 {
1258         // medusa does not support video standard sensing of current input
1259         *norm = CX25821_NORMS;
1260
1261         return 0;
1262 }
1263
1264 int is_valid_width(u32 width, v4l2_std_id tvnorm)
1265 {
1266         if (tvnorm == V4L2_STD_PAL_BG) {
1267                 if (width == 352 || width == 720)
1268                         return 1;
1269                 else
1270                         return 0;
1271         }
1272
1273         if (tvnorm == V4L2_STD_NTSC_M) {
1274                 if (width == 320 || width == 352 || width == 720)
1275                         return 1;
1276                 else
1277                         return 0;
1278         }
1279         return 0;
1280 }
1281
1282 int is_valid_height(u32 height, v4l2_std_id tvnorm)
1283 {
1284         if (tvnorm == V4L2_STD_PAL_BG) {
1285                 if (height == 576 || height == 288)
1286                         return 1;
1287                 else
1288                         return 0;
1289         }
1290
1291         if (tvnorm == V4L2_STD_NTSC_M) {
1292                 if (height == 480 || height == 240)
1293                         return 1;
1294                 else
1295                         return 0;
1296         }
1297
1298         return 0;
1299 }