1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2015 VanguardiaSur - www.vanguardiasur.com.ar
4 *
5 * Based on original driver by Krzysztof Ha?asa:
6 * Copyright (C) 2015 Industrial Research Institute for Automation
7 * and Measurements PIAP
8 */
9
10 #include <linux/init.h>
11 #include <linux/delay.h>
12 #include <linux/list.h>
13 #include <linux/module.h>
14 #include <linux/kernel.h>
15 #include <linux/slab.h>
16 #include <media/v4l2-common.h>
17 #include <media/v4l2-event.h>
18 #include <media/videobuf2-dma-contig.h>
19 #include <media/videobuf2-dma-sg.h>
20 #include <media/videobuf2-vmalloc.h>
21 #include "tw686x.h"
22 #include "tw686x-regs.h"
23
24 #define TW686X_INPUTS_PER_CH 4
25 #define TW686X_VIDEO_WIDTH 720
26 #define TW686X_VIDEO_HEIGHT(id) ((id & V4L2_STD_525_60) ? 480 : 576)
27 #define TW686X_MAX_FPS(id) ((id & V4L2_STD_525_60) ? 30 : 25)
28
29 #define TW686X_MAX_SG_ENTRY_SIZE 4096
30 #define TW686X_MAX_SG_DESC_COUNT 256 /* PAL 720x576 needs 203 4-KB pages */
31 #define TW686X_SG_TABLE_SIZE (TW686X_MAX_SG_DESC_COUNT * sizeof(struct tw686x_sg_desc))
32
33 static const struct tw686x_format formats[] = {
34 {
35 .fourcc = V4L2_PIX_FMT_UYVY,
36 .mode = 0,
37 .depth = 16,
38 }, {
39 .fourcc = V4L2_PIX_FMT_RGB565,
40 .mode = 5,
41 .depth = 16,
42 }, {
43 .fourcc = V4L2_PIX_FMT_YUYV,
44 .mode = 6,
45 .depth = 16,
46 }
47 };
48
tw686x_buf_done(struct tw686x_video_channel * vc,unsigned int pb)49 static void tw686x_buf_done(struct tw686x_video_channel *vc,
50 unsigned int pb)
51 {
52 struct tw686x_dma_desc *desc = &vc->dma_descs[pb];
53 struct tw686x_dev *dev = vc->dev;
54 struct vb2_v4l2_buffer *vb;
55 struct vb2_buffer *vb2_buf;
56
57 if (vc->curr_bufs[pb]) {
58 vb = &vc->curr_bufs[pb]->vb;
59
60 vb->field = dev->dma_ops->field;
61 vb->sequence = vc->sequence++;
62 vb2_buf = &vb->vb2_buf;
63
64 if (dev->dma_mode == TW686X_DMA_MODE_MEMCPY)
65 memcpy(vb2_plane_vaddr(vb2_buf, 0), desc->virt,
66 desc->size);
67 vb2_buf->timestamp = ktime_get_ns();
68 vb2_buffer_done(vb2_buf, VB2_BUF_STATE_DONE);
69 }
70
71 vc->pb = !pb;
72 }
73
74 /*
75 * We can call this even when alloc_dma failed for the given channel
76 */
tw686x_memcpy_dma_free(struct tw686x_video_channel * vc,unsigned int pb)77 static void tw686x_memcpy_dma_free(struct tw686x_video_channel *vc,
78 unsigned int pb)
79 {
80 struct tw686x_dma_desc *desc = &vc->dma_descs[pb];
81 struct tw686x_dev *dev = vc->dev;
82 struct pci_dev *pci_dev;
83 unsigned long flags;
84
85 /* Check device presence. Shouldn't really happen! */
86 spin_lock_irqsave(&dev->lock, flags);
87 pci_dev = dev->pci_dev;
88 spin_unlock_irqrestore(&dev->lock, flags);
89 if (!pci_dev) {
90 WARN(1, "trying to deallocate on missing device\n");
91 return;
92 }
93
94 if (desc->virt) {
95 dma_free_coherent(&dev->pci_dev->dev, desc->size, desc->virt,
96 desc->phys);
97 desc->virt = NULL;
98 }
99 }
100
tw686x_memcpy_dma_alloc(struct tw686x_video_channel * vc,unsigned int pb)101 static int tw686x_memcpy_dma_alloc(struct tw686x_video_channel *vc,
102 unsigned int pb)
103 {
104 struct tw686x_dev *dev = vc->dev;
105 u32 reg = pb ? VDMA_B_ADDR[vc->ch] : VDMA_P_ADDR[vc->ch];
106 unsigned int len;
107 void *virt;
108
109 WARN(vc->dma_descs[pb].virt,
110 "Allocating buffer but previous still here\n");
111
112 len = (vc->width * vc->height * vc->format->depth) >> 3;
113 virt = dma_alloc_coherent(&dev->pci_dev->dev, len,
114 &vc->dma_descs[pb].phys, GFP_KERNEL);
115 if (!virt) {
116 v4l2_err(&dev->v4l2_dev,
117 "dma%d: unable to allocate %s-buffer\n",
118 vc->ch, pb ? "B" : "P");
119 return -ENOMEM;
120 }
121 vc->dma_descs[pb].size = len;
122 vc->dma_descs[pb].virt = virt;
123 reg_write(dev, reg, vc->dma_descs[pb].phys);
124
125 return 0;
126 }
127
tw686x_memcpy_buf_refill(struct tw686x_video_channel * vc,unsigned int pb)128 static void tw686x_memcpy_buf_refill(struct tw686x_video_channel *vc,
129 unsigned int pb)
130 {
131 struct tw686x_v4l2_buf *buf;
132
133 while (!list_empty(&vc->vidq_queued)) {
134
135 buf = list_first_entry(&vc->vidq_queued,
136 struct tw686x_v4l2_buf, list);
137 list_del(&buf->list);
138
139 vc->curr_bufs[pb] = buf;
140 return;
141 }
142 vc->curr_bufs[pb] = NULL;
143 }
144
145 static const struct tw686x_dma_ops memcpy_dma_ops = {
146 .alloc = tw686x_memcpy_dma_alloc,
147 .free = tw686x_memcpy_dma_free,
148 .buf_refill = tw686x_memcpy_buf_refill,
149 .mem_ops = &vb2_vmalloc_memops,
150 .hw_dma_mode = TW686X_FRAME_MODE,
151 .field = V4L2_FIELD_INTERLACED,
152 };
153
tw686x_contig_buf_refill(struct tw686x_video_channel * vc,unsigned int pb)154 static void tw686x_contig_buf_refill(struct tw686x_video_channel *vc,
155 unsigned int pb)
156 {
157 struct tw686x_v4l2_buf *buf;
158
159 while (!list_empty(&vc->vidq_queued)) {
160 u32 reg = pb ? VDMA_B_ADDR[vc->ch] : VDMA_P_ADDR[vc->ch];
161 dma_addr_t phys;
162
163 buf = list_first_entry(&vc->vidq_queued,
164 struct tw686x_v4l2_buf, list);
165 list_del(&buf->list);
166
167 phys = vb2_dma_contig_plane_dma_addr(&buf->vb.vb2_buf, 0);
168 reg_write(vc->dev, reg, phys);
169
170 buf->vb.vb2_buf.state = VB2_BUF_STATE_ACTIVE;
171 vc->curr_bufs[pb] = buf;
172 return;
173 }
174 vc->curr_bufs[pb] = NULL;
175 }
176
177 static const struct tw686x_dma_ops contig_dma_ops = {
178 .buf_refill = tw686x_contig_buf_refill,
179 .mem_ops = &vb2_dma_contig_memops,
180 .hw_dma_mode = TW686X_FRAME_MODE,
181 .field = V4L2_FIELD_INTERLACED,
182 };
183
tw686x_sg_desc_fill(struct tw686x_sg_desc * descs,struct tw686x_v4l2_buf * buf,unsigned int buf_len)184 static int tw686x_sg_desc_fill(struct tw686x_sg_desc *descs,
185 struct tw686x_v4l2_buf *buf,
186 unsigned int buf_len)
187 {
188 struct sg_table *vbuf = vb2_dma_sg_plane_desc(&buf->vb.vb2_buf, 0);
189 unsigned int len, entry_len;
190 struct scatterlist *sg;
191 int i, count;
192
193 /* Clear the scatter-gather table */
194 memset(descs, 0, TW686X_SG_TABLE_SIZE);
195
196 count = 0;
197 for_each_sg(vbuf->sgl, sg, vbuf->nents, i) {
198 dma_addr_t phys = sg_dma_address(sg);
199 len = sg_dma_len(sg);
200
201 while (len && buf_len) {
202
203 if (count == TW686X_MAX_SG_DESC_COUNT)
204 return -ENOMEM;
205
206 entry_len = min_t(unsigned int, len,
207 TW686X_MAX_SG_ENTRY_SIZE);
208 entry_len = min_t(unsigned int, entry_len, buf_len);
209 descs[count].phys = cpu_to_le32(phys);
210 descs[count++].flags_length =
211 cpu_to_le32(BIT(30) | entry_len);
212 phys += entry_len;
213 len -= entry_len;
214 buf_len -= entry_len;
215 }
216
217 if (!buf_len)
218 return 0;
219 }
220
221 return -ENOMEM;
222 }
223
tw686x_sg_buf_refill(struct tw686x_video_channel * vc,unsigned int pb)224 static void tw686x_sg_buf_refill(struct tw686x_video_channel *vc,
225 unsigned int pb)
226 {
227 struct tw686x_dev *dev = vc->dev;
228 struct tw686x_v4l2_buf *buf;
229
230 while (!list_empty(&vc->vidq_queued)) {
231 unsigned int buf_len;
232
233 buf = list_first_entry(&vc->vidq_queued,
234 struct tw686x_v4l2_buf, list);
235 list_del(&buf->list);
236
237 buf_len = (vc->width * vc->height * vc->format->depth) >> 3;
238 if (tw686x_sg_desc_fill(vc->sg_descs[pb], buf, buf_len)) {
239 v4l2_err(&dev->v4l2_dev,
240 "dma%d: unable to fill %s-buffer\n",
241 vc->ch, pb ? "B" : "P");
242 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
243 continue;
244 }
245
246 buf->vb.vb2_buf.state = VB2_BUF_STATE_ACTIVE;
247 vc->curr_bufs[pb] = buf;
248 return;
249 }
250
251 vc->curr_bufs[pb] = NULL;
252 }
253
tw686x_sg_dma_free(struct tw686x_video_channel * vc,unsigned int pb)254 static void tw686x_sg_dma_free(struct tw686x_video_channel *vc,
255 unsigned int pb)
256 {
257 struct tw686x_dma_desc *desc = &vc->dma_descs[pb];
258 struct tw686x_dev *dev = vc->dev;
259
260 if (desc->size) {
261 dma_free_coherent(&dev->pci_dev->dev, desc->size, desc->virt,
262 desc->phys);
263 desc->virt = NULL;
264 }
265
266 vc->sg_descs[pb] = NULL;
267 }
268
tw686x_sg_dma_alloc(struct tw686x_video_channel * vc,unsigned int pb)269 static int tw686x_sg_dma_alloc(struct tw686x_video_channel *vc,
270 unsigned int pb)
271 {
272 struct tw686x_dma_desc *desc = &vc->dma_descs[pb];
273 struct tw686x_dev *dev = vc->dev;
274 u32 reg = pb ? DMA_PAGE_TABLE1_ADDR[vc->ch] :
275 DMA_PAGE_TABLE0_ADDR[vc->ch];
276 void *virt;
277
278 if (desc->size) {
279 virt = dma_alloc_coherent(&dev->pci_dev->dev, desc->size,
280 &desc->phys, GFP_KERNEL);
281 if (!virt) {
282 v4l2_err(&dev->v4l2_dev,
283 "dma%d: unable to allocate %s-buffer\n",
284 vc->ch, pb ? "B" : "P");
285 return -ENOMEM;
286 }
287 desc->virt = virt;
288 reg_write(dev, reg, desc->phys);
289 } else {
290 virt = dev->video_channels[0].dma_descs[pb].virt +
291 vc->ch * TW686X_SG_TABLE_SIZE;
292 }
293
294 vc->sg_descs[pb] = virt;
295 return 0;
296 }
297
tw686x_sg_setup(struct tw686x_dev * dev)298 static int tw686x_sg_setup(struct tw686x_dev *dev)
299 {
300 unsigned int sg_table_size, pb, ch, channels;
301
302 if (is_second_gen(dev)) {
303 /*
304 * TW6865/TW6869: each channel needs a pair of
305 * P-B descriptor tables.
306 */
307 channels = max_channels(dev);
308 sg_table_size = TW686X_SG_TABLE_SIZE;
309 } else {
310 /*
311 * TW6864/TW6868: we need to allocate a pair of
312 * P-B descriptor tables, common for all channels.
313 * Each table will be bigger than 4 KB.
314 */
315 channels = 1;
316 sg_table_size = max_channels(dev) * TW686X_SG_TABLE_SIZE;
317 }
318
319 for (ch = 0; ch < channels; ch++) {
320 struct tw686x_video_channel *vc = &dev->video_channels[ch];
321
322 for (pb = 0; pb < 2; pb++)
323 vc->dma_descs[pb].size = sg_table_size;
324 }
325
326 return 0;
327 }
328
329 static const struct tw686x_dma_ops sg_dma_ops = {
330 .setup = tw686x_sg_setup,
331 .alloc = tw686x_sg_dma_alloc,
332 .free = tw686x_sg_dma_free,
333 .buf_refill = tw686x_sg_buf_refill,
334 .mem_ops = &vb2_dma_sg_memops,
335 .hw_dma_mode = TW686X_SG_MODE,
336 .field = V4L2_FIELD_SEQ_TB,
337 };
338
339 static const unsigned int fps_map[15] = {
340 /*
341 * bit 31 enables selecting the field control register
342 * bits 0-29 are a bitmask with fields that will be output.
343 * For NTSC (and PAL-M, PAL-60), all 30 bits are used.
344 * For other PAL standards, only the first 25 bits are used.
345 */
346 0x00000000, /* output all fields */
347 0x80000006, /* 2 fps (60Hz), 2 fps (50Hz) */
348 0x80018006, /* 4 fps (60Hz), 4 fps (50Hz) */
349 0x80618006, /* 6 fps (60Hz), 6 fps (50Hz) */
350 0x81818186, /* 8 fps (60Hz), 8 fps (50Hz) */
351 0x86186186, /* 10 fps (60Hz), 8 fps (50Hz) */
352 0x86619866, /* 12 fps (60Hz), 10 fps (50Hz) */
353 0x86666666, /* 14 fps (60Hz), 12 fps (50Hz) */
354 0x9999999e, /* 16 fps (60Hz), 14 fps (50Hz) */
355 0x99e6799e, /* 18 fps (60Hz), 16 fps (50Hz) */
356 0x9e79e79e, /* 20 fps (60Hz), 16 fps (50Hz) */
357 0x9e7e7e7e, /* 22 fps (60Hz), 18 fps (50Hz) */
358 0x9fe7f9fe, /* 24 fps (60Hz), 20 fps (50Hz) */
359 0x9ffe7ffe, /* 26 fps (60Hz), 22 fps (50Hz) */
360 0x9ffffffe, /* 28 fps (60Hz), 24 fps (50Hz) */
361 };
362
tw686x_real_fps(unsigned int index,unsigned int max_fps)363 static unsigned int tw686x_real_fps(unsigned int index, unsigned int max_fps)
364 {
365 unsigned long mask;
366
367 if (!index || index >= ARRAY_SIZE(fps_map))
368 return max_fps;
369
370 mask = GENMASK(max_fps - 1, 0);
371 return hweight_long(fps_map[index] & mask);
372 }
373
tw686x_fps_idx(unsigned int fps,unsigned int max_fps)374 static unsigned int tw686x_fps_idx(unsigned int fps, unsigned int max_fps)
375 {
376 unsigned int idx, real_fps;
377 int delta;
378
379 /* First guess */
380 idx = (12 + 15 * fps) / max_fps;
381
382 /* Minimal possible framerate is 2 frames per second */
383 if (!idx)
384 return 1;
385
386 /* Check if the difference is bigger than abs(1) and adjust */
387 real_fps = tw686x_real_fps(idx, max_fps);
388 delta = real_fps - fps;
389 if (delta < -1)
390 idx++;
391 else if (delta > 1)
392 idx--;
393
394 /* Max framerate */
395 if (idx >= 15)
396 return 0;
397
398 return idx;
399 }
400
tw686x_set_framerate(struct tw686x_video_channel * vc,unsigned int fps)401 static void tw686x_set_framerate(struct tw686x_video_channel *vc,
402 unsigned int fps)
403 {
404 unsigned int i;
405
406 i = tw686x_fps_idx(fps, TW686X_MAX_FPS(vc->video_standard));
407 reg_write(vc->dev, VIDEO_FIELD_CTRL[vc->ch], fps_map[i]);
408 vc->fps = tw686x_real_fps(i, TW686X_MAX_FPS(vc->video_standard));
409 }
410
format_by_fourcc(unsigned int fourcc)411 static const struct tw686x_format *format_by_fourcc(unsigned int fourcc)
412 {
413 unsigned int cnt;
414
415 for (cnt = 0; cnt < ARRAY_SIZE(formats); cnt++)
416 if (formats[cnt].fourcc == fourcc)
417 return &formats[cnt];
418 return NULL;
419 }
420
tw686x_queue_setup(struct vb2_queue * vq,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],struct device * alloc_devs[])421 static int tw686x_queue_setup(struct vb2_queue *vq,
422 unsigned int *nbuffers, unsigned int *nplanes,
423 unsigned int sizes[], struct device *alloc_devs[])
424 {
425 struct tw686x_video_channel *vc = vb2_get_drv_priv(vq);
426 unsigned int szimage =
427 (vc->width * vc->height * vc->format->depth) >> 3;
428
429 /*
430 * Let's request at least three buffers: two for the
431 * DMA engine and one for userspace.
432 */
433 if (vq->num_buffers + *nbuffers < 3)
434 *nbuffers = 3 - vq->num_buffers;
435
436 if (*nplanes) {
437 if (*nplanes != 1 || sizes[0] < szimage)
438 return -EINVAL;
439 return 0;
440 }
441
442 sizes[0] = szimage;
443 *nplanes = 1;
444 return 0;
445 }
446
tw686x_buf_queue(struct vb2_buffer * vb)447 static void tw686x_buf_queue(struct vb2_buffer *vb)
448 {
449 struct tw686x_video_channel *vc = vb2_get_drv_priv(vb->vb2_queue);
450 struct tw686x_dev *dev = vc->dev;
451 struct pci_dev *pci_dev;
452 unsigned long flags;
453 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
454 struct tw686x_v4l2_buf *buf =
455 container_of(vbuf, struct tw686x_v4l2_buf, vb);
456
457 /* Check device presence */
458 spin_lock_irqsave(&dev->lock, flags);
459 pci_dev = dev->pci_dev;
460 spin_unlock_irqrestore(&dev->lock, flags);
461 if (!pci_dev) {
462 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
463 return;
464 }
465
466 spin_lock_irqsave(&vc->qlock, flags);
467 list_add_tail(&buf->list, &vc->vidq_queued);
468 spin_unlock_irqrestore(&vc->qlock, flags);
469 }
470
tw686x_clear_queue(struct tw686x_video_channel * vc,enum vb2_buffer_state state)471 static void tw686x_clear_queue(struct tw686x_video_channel *vc,
472 enum vb2_buffer_state state)
473 {
474 unsigned int pb;
475
476 while (!list_empty(&vc->vidq_queued)) {
477 struct tw686x_v4l2_buf *buf;
478
479 buf = list_first_entry(&vc->vidq_queued,
480 struct tw686x_v4l2_buf, list);
481 list_del(&buf->list);
482 vb2_buffer_done(&buf->vb.vb2_buf, state);
483 }
484
485 for (pb = 0; pb < 2; pb++) {
486 if (vc->curr_bufs[pb])
487 vb2_buffer_done(&vc->curr_bufs[pb]->vb.vb2_buf, state);
488 vc->curr_bufs[pb] = NULL;
489 }
490 }
491
tw686x_start_streaming(struct vb2_queue * vq,unsigned int count)492 static int tw686x_start_streaming(struct vb2_queue *vq, unsigned int count)
493 {
494 struct tw686x_video_channel *vc = vb2_get_drv_priv(vq);
495 struct tw686x_dev *dev = vc->dev;
496 struct pci_dev *pci_dev;
497 unsigned long flags;
498 int pb, err;
499
500 /* Check device presence */
501 spin_lock_irqsave(&dev->lock, flags);
502 pci_dev = dev->pci_dev;
503 spin_unlock_irqrestore(&dev->lock, flags);
504 if (!pci_dev) {
505 err = -ENODEV;
506 goto err_clear_queue;
507 }
508
509 spin_lock_irqsave(&vc->qlock, flags);
510
511 /* Sanity check */
512 if (dev->dma_mode == TW686X_DMA_MODE_MEMCPY &&
513 (!vc->dma_descs[0].virt || !vc->dma_descs[1].virt)) {
514 spin_unlock_irqrestore(&vc->qlock, flags);
515 v4l2_err(&dev->v4l2_dev,
516 "video%d: refusing to start without DMA buffers\n",
517 vc->num);
518 err = -ENOMEM;
519 goto err_clear_queue;
520 }
521
522 for (pb = 0; pb < 2; pb++)
523 dev->dma_ops->buf_refill(vc, pb);
524 spin_unlock_irqrestore(&vc->qlock, flags);
525
526 vc->sequence = 0;
527 vc->pb = 0;
528
529 spin_lock_irqsave(&dev->lock, flags);
530 tw686x_enable_channel(dev, vc->ch);
531 spin_unlock_irqrestore(&dev->lock, flags);
532
533 mod_timer(&dev->dma_delay_timer, jiffies + msecs_to_jiffies(100));
534
535 return 0;
536
537 err_clear_queue:
538 spin_lock_irqsave(&vc->qlock, flags);
539 tw686x_clear_queue(vc, VB2_BUF_STATE_QUEUED);
540 spin_unlock_irqrestore(&vc->qlock, flags);
541 return err;
542 }
543
tw686x_stop_streaming(struct vb2_queue * vq)544 static void tw686x_stop_streaming(struct vb2_queue *vq)
545 {
546 struct tw686x_video_channel *vc = vb2_get_drv_priv(vq);
547 struct tw686x_dev *dev = vc->dev;
548 struct pci_dev *pci_dev;
549 unsigned long flags;
550
551 /* Check device presence */
552 spin_lock_irqsave(&dev->lock, flags);
553 pci_dev = dev->pci_dev;
554 spin_unlock_irqrestore(&dev->lock, flags);
555 if (pci_dev)
556 tw686x_disable_channel(dev, vc->ch);
557
558 spin_lock_irqsave(&vc->qlock, flags);
559 tw686x_clear_queue(vc, VB2_BUF_STATE_ERROR);
560 spin_unlock_irqrestore(&vc->qlock, flags);
561 }
562
tw686x_buf_prepare(struct vb2_buffer * vb)563 static int tw686x_buf_prepare(struct vb2_buffer *vb)
564 {
565 struct tw686x_video_channel *vc = vb2_get_drv_priv(vb->vb2_queue);
566 unsigned int size =
567 (vc->width * vc->height * vc->format->depth) >> 3;
568
569 if (vb2_plane_size(vb, 0) < size)
570 return -EINVAL;
571 vb2_set_plane_payload(vb, 0, size);
572 return 0;
573 }
574
575 static const struct vb2_ops tw686x_video_qops = {
576 .queue_setup = tw686x_queue_setup,
577 .buf_queue = tw686x_buf_queue,
578 .buf_prepare = tw686x_buf_prepare,
579 .start_streaming = tw686x_start_streaming,
580 .stop_streaming = tw686x_stop_streaming,
581 .wait_prepare = vb2_ops_wait_prepare,
582 .wait_finish = vb2_ops_wait_finish,
583 };
584
tw686x_s_ctrl(struct v4l2_ctrl * ctrl)585 static int tw686x_s_ctrl(struct v4l2_ctrl *ctrl)
586 {
587 struct tw686x_video_channel *vc;
588 struct tw686x_dev *dev;
589 unsigned int ch;
590
591 vc = container_of(ctrl->handler, struct tw686x_video_channel,
592 ctrl_handler);
593 dev = vc->dev;
594 ch = vc->ch;
595
596 switch (ctrl->id) {
597 case V4L2_CID_BRIGHTNESS:
598 reg_write(dev, BRIGHT[ch], ctrl->val & 0xff);
599 return 0;
600
601 case V4L2_CID_CONTRAST:
602 reg_write(dev, CONTRAST[ch], ctrl->val);
603 return 0;
604
605 case V4L2_CID_SATURATION:
606 reg_write(dev, SAT_U[ch], ctrl->val);
607 reg_write(dev, SAT_V[ch], ctrl->val);
608 return 0;
609
610 case V4L2_CID_HUE:
611 reg_write(dev, HUE[ch], ctrl->val & 0xff);
612 return 0;
613 }
614
615 return -EINVAL;
616 }
617
618 static const struct v4l2_ctrl_ops ctrl_ops = {
619 .s_ctrl = tw686x_s_ctrl,
620 };
621
tw686x_g_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)622 static int tw686x_g_fmt_vid_cap(struct file *file, void *priv,
623 struct v4l2_format *f)
624 {
625 struct tw686x_video_channel *vc = video_drvdata(file);
626 struct tw686x_dev *dev = vc->dev;
627
628 f->fmt.pix.width = vc->width;
629 f->fmt.pix.height = vc->height;
630 f->fmt.pix.field = dev->dma_ops->field;
631 f->fmt.pix.pixelformat = vc->format->fourcc;
632 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
633 f->fmt.pix.bytesperline = (f->fmt.pix.width * vc->format->depth) / 8;
634 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
635 return 0;
636 }
637
tw686x_try_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)638 static int tw686x_try_fmt_vid_cap(struct file *file, void *priv,
639 struct v4l2_format *f)
640 {
641 struct tw686x_video_channel *vc = video_drvdata(file);
642 struct tw686x_dev *dev = vc->dev;
643 unsigned int video_height = TW686X_VIDEO_HEIGHT(vc->video_standard);
644 const struct tw686x_format *format;
645
646 format = format_by_fourcc(f->fmt.pix.pixelformat);
647 if (!format) {
648 format = &formats[0];
649 f->fmt.pix.pixelformat = format->fourcc;
650 }
651
652 if (f->fmt.pix.width <= TW686X_VIDEO_WIDTH / 2)
653 f->fmt.pix.width = TW686X_VIDEO_WIDTH / 2;
654 else
655 f->fmt.pix.width = TW686X_VIDEO_WIDTH;
656
657 if (f->fmt.pix.height <= video_height / 2)
658 f->fmt.pix.height = video_height / 2;
659 else
660 f->fmt.pix.height = video_height;
661
662 f->fmt.pix.bytesperline = (f->fmt.pix.width * format->depth) / 8;
663 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
664 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
665 f->fmt.pix.field = dev->dma_ops->field;
666
667 return 0;
668 }
669
tw686x_set_format(struct tw686x_video_channel * vc,unsigned int pixelformat,unsigned int width,unsigned int height,bool realloc)670 static int tw686x_set_format(struct tw686x_video_channel *vc,
671 unsigned int pixelformat, unsigned int width,
672 unsigned int height, bool realloc)
673 {
674 struct tw686x_dev *dev = vc->dev;
675 u32 val, dma_width, dma_height, dma_line_width;
676 int err, pb;
677
678 vc->format = format_by_fourcc(pixelformat);
679 vc->width = width;
680 vc->height = height;
681
682 /* We need new DMA buffers if the framesize has changed */
683 if (dev->dma_ops->alloc && realloc) {
684 for (pb = 0; pb < 2; pb++)
685 dev->dma_ops->free(vc, pb);
686
687 for (pb = 0; pb < 2; pb++) {
688 err = dev->dma_ops->alloc(vc, pb);
689 if (err) {
690 if (pb > 0)
691 dev->dma_ops->free(vc, 0);
692 return err;
693 }
694 }
695 }
696
697 val = reg_read(vc->dev, VDMA_CHANNEL_CONFIG[vc->ch]);
698
699 if (vc->width <= TW686X_VIDEO_WIDTH / 2)
700 val |= BIT(23);
701 else
702 val &= ~BIT(23);
703
704 if (vc->height <= TW686X_VIDEO_HEIGHT(vc->video_standard) / 2)
705 val |= BIT(24);
706 else
707 val &= ~BIT(24);
708
709 val &= ~0x7ffff;
710
711 /* Program the DMA scatter-gather */
712 if (dev->dma_mode == TW686X_DMA_MODE_SG) {
713 u32 start_idx, end_idx;
714
715 start_idx = is_second_gen(dev) ?
716 0 : vc->ch * TW686X_MAX_SG_DESC_COUNT;
717 end_idx = start_idx + TW686X_MAX_SG_DESC_COUNT - 1;
718
719 val |= (end_idx << 10) | start_idx;
720 }
721
722 val &= ~(0x7 << 20);
723 val |= vc->format->mode << 20;
724 reg_write(vc->dev, VDMA_CHANNEL_CONFIG[vc->ch], val);
725
726 /* Program the DMA frame size */
727 dma_width = (vc->width * 2) & 0x7ff;
728 dma_height = vc->height / 2;
729 dma_line_width = (vc->width * 2) & 0x7ff;
730 val = (dma_height << 22) | (dma_line_width << 11) | dma_width;
731 reg_write(vc->dev, VDMA_WHP[vc->ch], val);
732 return 0;
733 }
734
tw686x_s_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)735 static int tw686x_s_fmt_vid_cap(struct file *file, void *priv,
736 struct v4l2_format *f)
737 {
738 struct tw686x_video_channel *vc = video_drvdata(file);
739 unsigned long area;
740 bool realloc;
741 int err;
742
743 if (vb2_is_busy(&vc->vidq))
744 return -EBUSY;
745
746 area = vc->width * vc->height;
747 err = tw686x_try_fmt_vid_cap(file, priv, f);
748 if (err)
749 return err;
750
751 realloc = area != (f->fmt.pix.width * f->fmt.pix.height);
752 return tw686x_set_format(vc, f->fmt.pix.pixelformat,
753 f->fmt.pix.width, f->fmt.pix.height,
754 realloc);
755 }
756
tw686x_querycap(struct file * file,void * priv,struct v4l2_capability * cap)757 static int tw686x_querycap(struct file *file, void *priv,
758 struct v4l2_capability *cap)
759 {
760 struct tw686x_video_channel *vc = video_drvdata(file);
761 struct tw686x_dev *dev = vc->dev;
762
763 strscpy(cap->driver, "tw686x", sizeof(cap->driver));
764 strscpy(cap->card, dev->name, sizeof(cap->card));
765 return 0;
766 }
767
tw686x_set_standard(struct tw686x_video_channel * vc,v4l2_std_id id)768 static int tw686x_set_standard(struct tw686x_video_channel *vc, v4l2_std_id id)
769 {
770 u32 val;
771
772 if (id & V4L2_STD_NTSC)
773 val = 0;
774 else if (id & V4L2_STD_PAL)
775 val = 1;
776 else if (id & V4L2_STD_SECAM)
777 val = 2;
778 else if (id & V4L2_STD_NTSC_443)
779 val = 3;
780 else if (id & V4L2_STD_PAL_M)
781 val = 4;
782 else if (id & V4L2_STD_PAL_Nc)
783 val = 5;
784 else if (id & V4L2_STD_PAL_60)
785 val = 6;
786 else
787 return -EINVAL;
788
789 vc->video_standard = id;
790 reg_write(vc->dev, SDT[vc->ch], val);
791
792 val = reg_read(vc->dev, VIDEO_CONTROL1);
793 if (id & V4L2_STD_525_60)
794 val &= ~(1 << (SYS_MODE_DMA_SHIFT + vc->ch));
795 else
796 val |= (1 << (SYS_MODE_DMA_SHIFT + vc->ch));
797 reg_write(vc->dev, VIDEO_CONTROL1, val);
798
799 return 0;
800 }
801
tw686x_s_std(struct file * file,void * priv,v4l2_std_id id)802 static int tw686x_s_std(struct file *file, void *priv, v4l2_std_id id)
803 {
804 struct tw686x_video_channel *vc = video_drvdata(file);
805 struct v4l2_format f;
806 int ret;
807
808 if (vc->video_standard == id)
809 return 0;
810
811 if (vb2_is_busy(&vc->vidq))
812 return -EBUSY;
813
814 ret = tw686x_set_standard(vc, id);
815 if (ret)
816 return ret;
817 /*
818 * Adjust format after V4L2_STD_525_60/V4L2_STD_625_50 change,
819 * calling g_fmt and s_fmt will sanitize the height
820 * according to the standard.
821 */
822 tw686x_g_fmt_vid_cap(file, priv, &f);
823 tw686x_s_fmt_vid_cap(file, priv, &f);
824
825 /*
826 * Frame decimation depends on the chosen standard,
827 * so reset it to the current value.
828 */
829 tw686x_set_framerate(vc, vc->fps);
830 return 0;
831 }
832
tw686x_querystd(struct file * file,void * priv,v4l2_std_id * std)833 static int tw686x_querystd(struct file *file, void *priv, v4l2_std_id *std)
834 {
835 struct tw686x_video_channel *vc = video_drvdata(file);
836 struct tw686x_dev *dev = vc->dev;
837 unsigned int old_std, detected_std = 0;
838 unsigned long end;
839
840 if (vb2_is_streaming(&vc->vidq))
841 return -EBUSY;
842
843 /* Enable and start standard detection */
844 old_std = reg_read(dev, SDT[vc->ch]);
845 reg_write(dev, SDT[vc->ch], 0x7);
846 reg_write(dev, SDT_EN[vc->ch], 0xff);
847
848 end = jiffies + msecs_to_jiffies(500);
849 while (time_is_after_jiffies(end)) {
850
851 detected_std = reg_read(dev, SDT[vc->ch]);
852 if (!(detected_std & BIT(7)))
853 break;
854 msleep(100);
855 }
856 reg_write(dev, SDT[vc->ch], old_std);
857
858 /* Exit if still busy */
859 if (detected_std & BIT(7))
860 return 0;
861
862 detected_std = (detected_std >> 4) & 0x7;
863 switch (detected_std) {
864 case TW686X_STD_NTSC_M:
865 *std &= V4L2_STD_NTSC;
866 break;
867 case TW686X_STD_NTSC_443:
868 *std &= V4L2_STD_NTSC_443;
869 break;
870 case TW686X_STD_PAL_M:
871 *std &= V4L2_STD_PAL_M;
872 break;
873 case TW686X_STD_PAL_60:
874 *std &= V4L2_STD_PAL_60;
875 break;
876 case TW686X_STD_PAL:
877 *std &= V4L2_STD_PAL;
878 break;
879 case TW686X_STD_PAL_CN:
880 *std &= V4L2_STD_PAL_Nc;
881 break;
882 case TW686X_STD_SECAM:
883 *std &= V4L2_STD_SECAM;
884 break;
885 default:
886 *std = 0;
887 }
888 return 0;
889 }
890
tw686x_g_std(struct file * file,void * priv,v4l2_std_id * id)891 static int tw686x_g_std(struct file *file, void *priv, v4l2_std_id *id)
892 {
893 struct tw686x_video_channel *vc = video_drvdata(file);
894
895 *id = vc->video_standard;
896 return 0;
897 }
898
tw686x_enum_framesizes(struct file * file,void * priv,struct v4l2_frmsizeenum * fsize)899 static int tw686x_enum_framesizes(struct file *file, void *priv,
900 struct v4l2_frmsizeenum *fsize)
901 {
902 struct tw686x_video_channel *vc = video_drvdata(file);
903
904 if (fsize->index)
905 return -EINVAL;
906 fsize->type = V4L2_FRMSIZE_TYPE_STEPWISE;
907 fsize->stepwise.max_width = TW686X_VIDEO_WIDTH;
908 fsize->stepwise.min_width = fsize->stepwise.max_width / 2;
909 fsize->stepwise.step_width = fsize->stepwise.min_width;
910 fsize->stepwise.max_height = TW686X_VIDEO_HEIGHT(vc->video_standard);
911 fsize->stepwise.min_height = fsize->stepwise.max_height / 2;
912 fsize->stepwise.step_height = fsize->stepwise.min_height;
913 return 0;
914 }
915
tw686x_enum_frameintervals(struct file * file,void * priv,struct v4l2_frmivalenum * ival)916 static int tw686x_enum_frameintervals(struct file *file, void *priv,
917 struct v4l2_frmivalenum *ival)
918 {
919 struct tw686x_video_channel *vc = video_drvdata(file);
920 int max_fps = TW686X_MAX_FPS(vc->video_standard);
921 int max_rates = DIV_ROUND_UP(max_fps, 2);
922
923 if (ival->index >= max_rates)
924 return -EINVAL;
925
926 ival->type = V4L2_FRMIVAL_TYPE_DISCRETE;
927 ival->discrete.numerator = 1;
928 if (ival->index < (max_rates - 1))
929 ival->discrete.denominator = (ival->index + 1) * 2;
930 else
931 ival->discrete.denominator = max_fps;
932 return 0;
933 }
934
tw686x_g_parm(struct file * file,void * priv,struct v4l2_streamparm * sp)935 static int tw686x_g_parm(struct file *file, void *priv,
936 struct v4l2_streamparm *sp)
937 {
938 struct tw686x_video_channel *vc = video_drvdata(file);
939 struct v4l2_captureparm *cp = &sp->parm.capture;
940
941 if (sp->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
942 return -EINVAL;
943 sp->parm.capture.readbuffers = 3;
944
945 cp->capability = V4L2_CAP_TIMEPERFRAME;
946 cp->timeperframe.numerator = 1;
947 cp->timeperframe.denominator = vc->fps;
948 return 0;
949 }
950
tw686x_s_parm(struct file * file,void * priv,struct v4l2_streamparm * sp)951 static int tw686x_s_parm(struct file *file, void *priv,
952 struct v4l2_streamparm *sp)
953 {
954 struct tw686x_video_channel *vc = video_drvdata(file);
955 struct v4l2_captureparm *cp = &sp->parm.capture;
956 unsigned int denominator = cp->timeperframe.denominator;
957 unsigned int numerator = cp->timeperframe.numerator;
958 unsigned int fps;
959
960 if (vb2_is_busy(&vc->vidq))
961 return -EBUSY;
962
963 fps = (!numerator || !denominator) ? 0 : denominator / numerator;
964 if (vc->fps != fps)
965 tw686x_set_framerate(vc, fps);
966 return tw686x_g_parm(file, priv, sp);
967 }
968
tw686x_enum_fmt_vid_cap(struct file * file,void * priv,struct v4l2_fmtdesc * f)969 static int tw686x_enum_fmt_vid_cap(struct file *file, void *priv,
970 struct v4l2_fmtdesc *f)
971 {
972 if (f->index >= ARRAY_SIZE(formats))
973 return -EINVAL;
974 f->pixelformat = formats[f->index].fourcc;
975 return 0;
976 }
977
tw686x_set_input(struct tw686x_video_channel * vc,unsigned int i)978 static void tw686x_set_input(struct tw686x_video_channel *vc, unsigned int i)
979 {
980 u32 val;
981
982 vc->input = i;
983
984 val = reg_read(vc->dev, VDMA_CHANNEL_CONFIG[vc->ch]);
985 val &= ~(0x3 << 30);
986 val |= i << 30;
987 reg_write(vc->dev, VDMA_CHANNEL_CONFIG[vc->ch], val);
988 }
989
tw686x_s_input(struct file * file,void * priv,unsigned int i)990 static int tw686x_s_input(struct file *file, void *priv, unsigned int i)
991 {
992 struct tw686x_video_channel *vc = video_drvdata(file);
993
994 if (i >= TW686X_INPUTS_PER_CH)
995 return -EINVAL;
996 if (i == vc->input)
997 return 0;
998 /*
999 * Not sure we are able to support on the fly input change
1000 */
1001 if (vb2_is_busy(&vc->vidq))
1002 return -EBUSY;
1003
1004 tw686x_set_input(vc, i);
1005 return 0;
1006 }
1007
tw686x_g_input(struct file * file,void * priv,unsigned int * i)1008 static int tw686x_g_input(struct file *file, void *priv, unsigned int *i)
1009 {
1010 struct tw686x_video_channel *vc = video_drvdata(file);
1011
1012 *i = vc->input;
1013 return 0;
1014 }
1015
tw686x_enum_input(struct file * file,void * priv,struct v4l2_input * i)1016 static int tw686x_enum_input(struct file *file, void *priv,
1017 struct v4l2_input *i)
1018 {
1019 struct tw686x_video_channel *vc = video_drvdata(file);
1020 unsigned int vidstat;
1021
1022 if (i->index >= TW686X_INPUTS_PER_CH)
1023 return -EINVAL;
1024
1025 snprintf(i->name, sizeof(i->name), "Composite%d", i->index);
1026 i->type = V4L2_INPUT_TYPE_CAMERA;
1027 i->std = vc->device->tvnorms;
1028 i->capabilities = V4L2_IN_CAP_STD;
1029
1030 vidstat = reg_read(vc->dev, VIDSTAT[vc->ch]);
1031 i->status = 0;
1032 if (vidstat & TW686X_VIDSTAT_VDLOSS)
1033 i->status |= V4L2_IN_ST_NO_SIGNAL;
1034 if (!(vidstat & TW686X_VIDSTAT_HLOCK))
1035 i->status |= V4L2_IN_ST_NO_H_LOCK;
1036
1037 return 0;
1038 }
1039
1040 static const struct v4l2_file_operations tw686x_video_fops = {
1041 .owner = THIS_MODULE,
1042 .open = v4l2_fh_open,
1043 .unlocked_ioctl = video_ioctl2,
1044 .release = vb2_fop_release,
1045 .poll = vb2_fop_poll,
1046 .read = vb2_fop_read,
1047 .mmap = vb2_fop_mmap,
1048 };
1049
1050 static const struct v4l2_ioctl_ops tw686x_video_ioctl_ops = {
1051 .vidioc_querycap = tw686x_querycap,
1052 .vidioc_g_fmt_vid_cap = tw686x_g_fmt_vid_cap,
1053 .vidioc_s_fmt_vid_cap = tw686x_s_fmt_vid_cap,
1054 .vidioc_enum_fmt_vid_cap = tw686x_enum_fmt_vid_cap,
1055 .vidioc_try_fmt_vid_cap = tw686x_try_fmt_vid_cap,
1056
1057 .vidioc_querystd = tw686x_querystd,
1058 .vidioc_g_std = tw686x_g_std,
1059 .vidioc_s_std = tw686x_s_std,
1060
1061 .vidioc_g_parm = tw686x_g_parm,
1062 .vidioc_s_parm = tw686x_s_parm,
1063 .vidioc_enum_framesizes = tw686x_enum_framesizes,
1064 .vidioc_enum_frameintervals = tw686x_enum_frameintervals,
1065
1066 .vidioc_enum_input = tw686x_enum_input,
1067 .vidioc_g_input = tw686x_g_input,
1068 .vidioc_s_input = tw686x_s_input,
1069
1070 .vidioc_reqbufs = vb2_ioctl_reqbufs,
1071 .vidioc_querybuf = vb2_ioctl_querybuf,
1072 .vidioc_qbuf = vb2_ioctl_qbuf,
1073 .vidioc_dqbuf = vb2_ioctl_dqbuf,
1074 .vidioc_create_bufs = vb2_ioctl_create_bufs,
1075 .vidioc_streamon = vb2_ioctl_streamon,
1076 .vidioc_streamoff = vb2_ioctl_streamoff,
1077 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
1078
1079 .vidioc_log_status = v4l2_ctrl_log_status,
1080 .vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
1081 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
1082 };
1083
tw686x_video_irq(struct tw686x_dev * dev,unsigned long requests,unsigned int pb_status,unsigned int fifo_status,unsigned int * reset_ch)1084 void tw686x_video_irq(struct tw686x_dev *dev, unsigned long requests,
1085 unsigned int pb_status, unsigned int fifo_status,
1086 unsigned int *reset_ch)
1087 {
1088 struct tw686x_video_channel *vc;
1089 unsigned long flags;
1090 unsigned int ch, pb;
1091
1092 for_each_set_bit(ch, &requests, max_channels(dev)) {
1093 vc = &dev->video_channels[ch];
1094
1095 /*
1096 * This can either be a blue frame (with signal-lost bit set)
1097 * or a good frame (with signal-lost bit clear). If we have just
1098 * got signal, then this channel needs resetting.
1099 */
1100 if (vc->no_signal && !(fifo_status & BIT(ch))) {
1101 v4l2_printk(KERN_DEBUG, &dev->v4l2_dev,
1102 "video%d: signal recovered\n", vc->num);
1103 vc->no_signal = false;
1104 *reset_ch |= BIT(ch);
1105 vc->pb = 0;
1106 continue;
1107 }
1108 vc->no_signal = !!(fifo_status & BIT(ch));
1109
1110 /* Check FIFO errors only if there's signal */
1111 if (!vc->no_signal) {
1112 u32 fifo_ov, fifo_bad;
1113
1114 fifo_ov = (fifo_status >> 24) & BIT(ch);
1115 fifo_bad = (fifo_status >> 16) & BIT(ch);
1116 if (fifo_ov || fifo_bad) {
1117 /* Mark this channel for reset */
1118 v4l2_printk(KERN_DEBUG, &dev->v4l2_dev,
1119 "video%d: FIFO error\n", vc->num);
1120 *reset_ch |= BIT(ch);
1121 vc->pb = 0;
1122 continue;
1123 }
1124 }
1125
1126 pb = !!(pb_status & BIT(ch));
1127 if (vc->pb != pb) {
1128 /* Mark this channel for reset */
1129 v4l2_printk(KERN_DEBUG, &dev->v4l2_dev,
1130 "video%d: unexpected p-b buffer!\n",
1131 vc->num);
1132 *reset_ch |= BIT(ch);
1133 vc->pb = 0;
1134 continue;
1135 }
1136
1137 spin_lock_irqsave(&vc->qlock, flags);
1138 tw686x_buf_done(vc, pb);
1139 dev->dma_ops->buf_refill(vc, pb);
1140 spin_unlock_irqrestore(&vc->qlock, flags);
1141 }
1142 }
1143
tw686x_video_free(struct tw686x_dev * dev)1144 void tw686x_video_free(struct tw686x_dev *dev)
1145 {
1146 unsigned int ch, pb;
1147
1148 for (ch = 0; ch < max_channels(dev); ch++) {
1149 struct tw686x_video_channel *vc = &dev->video_channels[ch];
1150
1151 video_unregister_device(vc->device);
1152
1153 if (dev->dma_ops->free)
1154 for (pb = 0; pb < 2; pb++)
1155 dev->dma_ops->free(vc, pb);
1156 }
1157 }
1158
tw686x_video_init(struct tw686x_dev * dev)1159 int tw686x_video_init(struct tw686x_dev *dev)
1160 {
1161 unsigned int ch, val;
1162 int err;
1163
1164 if (dev->dma_mode == TW686X_DMA_MODE_MEMCPY)
1165 dev->dma_ops = &memcpy_dma_ops;
1166 else if (dev->dma_mode == TW686X_DMA_MODE_CONTIG)
1167 dev->dma_ops = &contig_dma_ops;
1168 else if (dev->dma_mode == TW686X_DMA_MODE_SG)
1169 dev->dma_ops = &sg_dma_ops;
1170 else
1171 return -EINVAL;
1172
1173 err = v4l2_device_register(&dev->pci_dev->dev, &dev->v4l2_dev);
1174 if (err)
1175 return err;
1176
1177 if (dev->dma_ops->setup) {
1178 err = dev->dma_ops->setup(dev);
1179 if (err)
1180 return err;
1181 }
1182
1183 /* Initialize vc->dev and vc->ch for the error path */
1184 for (ch = 0; ch < max_channels(dev); ch++) {
1185 struct tw686x_video_channel *vc = &dev->video_channels[ch];
1186
1187 vc->dev = dev;
1188 vc->ch = ch;
1189 }
1190
1191 for (ch = 0; ch < max_channels(dev); ch++) {
1192 struct tw686x_video_channel *vc = &dev->video_channels[ch];
1193 struct video_device *vdev;
1194
1195 mutex_init(&vc->vb_mutex);
1196 spin_lock_init(&vc->qlock);
1197 INIT_LIST_HEAD(&vc->vidq_queued);
1198
1199 /* default settings */
1200 err = tw686x_set_standard(vc, V4L2_STD_NTSC);
1201 if (err)
1202 goto error;
1203
1204 err = tw686x_set_format(vc, formats[0].fourcc,
1205 TW686X_VIDEO_WIDTH,
1206 TW686X_VIDEO_HEIGHT(vc->video_standard),
1207 true);
1208 if (err)
1209 goto error;
1210
1211 tw686x_set_input(vc, 0);
1212 tw686x_set_framerate(vc, 30);
1213 reg_write(dev, VDELAY_LO[ch], 0x14);
1214 reg_write(dev, HACTIVE_LO[ch], 0xd0);
1215 reg_write(dev, VIDEO_SIZE[ch], 0);
1216
1217 vc->vidq.io_modes = VB2_READ | VB2_MMAP | VB2_DMABUF;
1218 vc->vidq.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1219 vc->vidq.drv_priv = vc;
1220 vc->vidq.buf_struct_size = sizeof(struct tw686x_v4l2_buf);
1221 vc->vidq.ops = &tw686x_video_qops;
1222 vc->vidq.mem_ops = dev->dma_ops->mem_ops;
1223 vc->vidq.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1224 vc->vidq.min_buffers_needed = 2;
1225 vc->vidq.lock = &vc->vb_mutex;
1226 vc->vidq.gfp_flags = dev->dma_mode != TW686X_DMA_MODE_MEMCPY ?
1227 GFP_DMA32 : 0;
1228 vc->vidq.dev = &dev->pci_dev->dev;
1229
1230 err = vb2_queue_init(&vc->vidq);
1231 if (err) {
1232 v4l2_err(&dev->v4l2_dev,
1233 "dma%d: cannot init vb2 queue\n", ch);
1234 goto error;
1235 }
1236
1237 err = v4l2_ctrl_handler_init(&vc->ctrl_handler, 4);
1238 if (err) {
1239 v4l2_err(&dev->v4l2_dev,
1240 "dma%d: cannot init ctrl handler\n", ch);
1241 goto error;
1242 }
1243 v4l2_ctrl_new_std(&vc->ctrl_handler, &ctrl_ops,
1244 V4L2_CID_BRIGHTNESS, -128, 127, 1, 0);
1245 v4l2_ctrl_new_std(&vc->ctrl_handler, &ctrl_ops,
1246 V4L2_CID_CONTRAST, 0, 255, 1, 100);
1247 v4l2_ctrl_new_std(&vc->ctrl_handler, &ctrl_ops,
1248 V4L2_CID_SATURATION, 0, 255, 1, 128);
1249 v4l2_ctrl_new_std(&vc->ctrl_handler, &ctrl_ops,
1250 V4L2_CID_HUE, -128, 127, 1, 0);
1251 err = vc->ctrl_handler.error;
1252 if (err)
1253 goto error;
1254
1255 err = v4l2_ctrl_handler_setup(&vc->ctrl_handler);
1256 if (err)
1257 goto error;
1258
1259 vdev = video_device_alloc();
1260 if (!vdev) {
1261 v4l2_err(&dev->v4l2_dev,
1262 "dma%d: unable to allocate device\n", ch);
1263 err = -ENOMEM;
1264 goto error;
1265 }
1266
1267 snprintf(vdev->name, sizeof(vdev->name), "%s video", dev->name);
1268 vdev->fops = &tw686x_video_fops;
1269 vdev->ioctl_ops = &tw686x_video_ioctl_ops;
1270 vdev->release = video_device_release;
1271 vdev->v4l2_dev = &dev->v4l2_dev;
1272 vdev->queue = &vc->vidq;
1273 vdev->tvnorms = V4L2_STD_525_60 | V4L2_STD_625_50;
1274 vdev->minor = -1;
1275 vdev->lock = &vc->vb_mutex;
1276 vdev->ctrl_handler = &vc->ctrl_handler;
1277 vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE |
1278 V4L2_CAP_STREAMING | V4L2_CAP_READWRITE;
1279 vc->device = vdev;
1280 video_set_drvdata(vdev, vc);
1281
1282 err = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
1283 if (err < 0) {
1284 video_device_release(vdev);
1285 goto error;
1286 }
1287 vc->num = vdev->num;
1288 }
1289
1290 val = TW686X_DEF_PHASE_REF;
1291 for (ch = 0; ch < max_channels(dev); ch++)
1292 val |= dev->dma_ops->hw_dma_mode << (16 + ch * 2);
1293 reg_write(dev, PHASE_REF, val);
1294
1295 reg_write(dev, MISC2[0], 0xe7);
1296 reg_write(dev, VCTRL1[0], 0xcc);
1297 reg_write(dev, LOOP[0], 0xa5);
1298 if (max_channels(dev) > 4) {
1299 reg_write(dev, VCTRL1[1], 0xcc);
1300 reg_write(dev, LOOP[1], 0xa5);
1301 reg_write(dev, MISC2[1], 0xe7);
1302 }
1303 return 0;
1304
1305 error:
1306 tw686x_video_free(dev);
1307 return err;
1308 }
1309