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Merge branch 'for-linus' of git://git.infradead.org/users/sameo/mfd-2.6
[linux-btrfs-devel.git] / drivers / media / video / sh_vou.c
blob6a729879d89e66b684d675839aa0fdf1b2c923ce
1 /*
2 * SuperH Video Output Unit (VOU) driver
3 *
4 * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11 #include <linux/dma-mapping.h>
12 #include <linux/delay.h>
13 #include <linux/errno.h>
14 #include <linux/fs.h>
15 #include <linux/i2c.h>
16 #include <linux/init.h>
17 #include <linux/interrupt.h>
18 #include <linux/kernel.h>
19 #include <linux/platform_device.h>
20 #include <linux/pm_runtime.h>
21 #include <linux/slab.h>
22 #include <linux/videodev2.h>
23
24 #include <media/sh_vou.h>
25 #include <media/v4l2-common.h>
26 #include <media/v4l2-device.h>
27 #include <media/v4l2-ioctl.h>
28 #include <media/v4l2-mediabus.h>
29 #include <media/videobuf-dma-contig.h>
30
31 /* Mirror addresses are not available for all registers */
32 #define VOUER 0
33 #define VOUCR 4
34 #define VOUSTR 8
35 #define VOUVCR 0xc
36 #define VOUISR 0x10
37 #define VOUBCR 0x14
38 #define VOUDPR 0x18
39 #define VOUDSR 0x1c
40 #define VOUVPR 0x20
41 #define VOUIR 0x24
42 #define VOUSRR 0x28
43 #define VOUMSR 0x2c
44 #define VOUHIR 0x30
45 #define VOUDFR 0x34
46 #define VOUAD1R 0x38
47 #define VOUAD2R 0x3c
48 #define VOUAIR 0x40
49 #define VOUSWR 0x44
50 #define VOURCR 0x48
51 #define VOURPR 0x50
52
53 enum sh_vou_status {
54 SH_VOU_IDLE,
55 SH_VOU_INITIALISING,
56 SH_VOU_RUNNING,
57 };
58
59 #define VOU_MAX_IMAGE_WIDTH 720
60 #define VOU_MAX_IMAGE_HEIGHT 576
61
62 struct sh_vou_device {
63 struct v4l2_device v4l2_dev;
64 struct video_device *vdev;
65 atomic_t use_count;
66 struct sh_vou_pdata *pdata;
67 spinlock_t lock;
68 void __iomem *base;
69 /* State information */
70 struct v4l2_pix_format pix;
71 struct v4l2_rect rect;
72 struct list_head queue;
73 v4l2_std_id std;
74 int pix_idx;
75 struct videobuf_buffer *active;
76 enum sh_vou_status status;
77 struct mutex fop_lock;
78 };
79
80 struct sh_vou_file {
81 struct videobuf_queue vbq;
82 };
83
84 /* Register access routines for sides A, B and mirror addresses */
85 static void sh_vou_reg_a_write(struct sh_vou_device *vou_dev, unsigned int reg,
86 u32 value)
87 {
88 __raw_writel(value, vou_dev->base + reg);
89 }
90
91 static void sh_vou_reg_ab_write(struct sh_vou_device *vou_dev, unsigned int reg,
92 u32 value)
93 {
94 __raw_writel(value, vou_dev->base + reg);
95 __raw_writel(value, vou_dev->base + reg + 0x1000);
96 }
97
98 static void sh_vou_reg_m_write(struct sh_vou_device *vou_dev, unsigned int reg,
99 u32 value)
100 {
101 __raw_writel(value, vou_dev->base + reg + 0x2000);
102 }
103
104 static u32 sh_vou_reg_a_read(struct sh_vou_device *vou_dev, unsigned int reg)
105 {
106 return __raw_readl(vou_dev->base + reg);
107 }
108
109 static void sh_vou_reg_a_set(struct sh_vou_device *vou_dev, unsigned int reg,
110 u32 value, u32 mask)
111 {
112 u32 old = __raw_readl(vou_dev->base + reg);
113
114 value = (value & mask) | (old & ~mask);
115 __raw_writel(value, vou_dev->base + reg);
116 }
117
118 static void sh_vou_reg_b_set(struct sh_vou_device *vou_dev, unsigned int reg,
119 u32 value, u32 mask)
120 {
121 sh_vou_reg_a_set(vou_dev, reg + 0x1000, value, mask);
122 }
123
124 static void sh_vou_reg_ab_set(struct sh_vou_device *vou_dev, unsigned int reg,
125 u32 value, u32 mask)
126 {
127 sh_vou_reg_a_set(vou_dev, reg, value, mask);
128 sh_vou_reg_b_set(vou_dev, reg, value, mask);
129 }
130
131 struct sh_vou_fmt {
132 u32 pfmt;
133 char *desc;
134 unsigned char bpp;
135 unsigned char rgb;
136 unsigned char yf;
137 unsigned char pkf;
138 };
139
140 /* Further pixel formats can be added */
141 static struct sh_vou_fmt vou_fmt[] = {
142 {
143 .pfmt = V4L2_PIX_FMT_NV12,
144 .bpp = 12,
145 .desc = "YVU420 planar",
146 .yf = 0,
147 .rgb = 0,
148 },
149 {
150 .pfmt = V4L2_PIX_FMT_NV16,
151 .bpp = 16,
152 .desc = "YVYU planar",
153 .yf = 1,
154 .rgb = 0,
155 },
156 {
157 .pfmt = V4L2_PIX_FMT_RGB24,
158 .bpp = 24,
159 .desc = "RGB24",
160 .pkf = 2,
161 .rgb = 1,
162 },
163 {
164 .pfmt = V4L2_PIX_FMT_RGB565,
165 .bpp = 16,
166 .desc = "RGB565",
167 .pkf = 3,
168 .rgb = 1,
169 },
170 {
171 .pfmt = V4L2_PIX_FMT_RGB565X,
172 .bpp = 16,
173 .desc = "RGB565 byteswapped",
174 .pkf = 3,
175 .rgb = 1,
176 },
177 };
178
179 static void sh_vou_schedule_next(struct sh_vou_device *vou_dev,
180 struct videobuf_buffer *vb)
181 {
182 dma_addr_t addr1, addr2;
183
184 addr1 = videobuf_to_dma_contig(vb);
185 switch (vou_dev->pix.pixelformat) {
186 case V4L2_PIX_FMT_NV12:
187 case V4L2_PIX_FMT_NV16:
188 addr2 = addr1 + vou_dev->pix.width * vou_dev->pix.height;
189 break;
190 default:
191 addr2 = 0;
192 }
193
194 sh_vou_reg_m_write(vou_dev, VOUAD1R, addr1);
195 sh_vou_reg_m_write(vou_dev, VOUAD2R, addr2);
196 }
197
198 static void sh_vou_stream_start(struct sh_vou_device *vou_dev,
199 struct videobuf_buffer *vb)
200 {
201 unsigned int row_coeff;
202 #ifdef __LITTLE_ENDIAN
203 u32 dataswap = 7;
204 #else
205 u32 dataswap = 0;
206 #endif
207
208 switch (vou_dev->pix.pixelformat) {
209 case V4L2_PIX_FMT_NV12:
210 case V4L2_PIX_FMT_NV16:
211 row_coeff = 1;
212 break;
213 case V4L2_PIX_FMT_RGB565:
214 dataswap ^= 1;
215 case V4L2_PIX_FMT_RGB565X:
216 row_coeff = 2;
217 break;
218 case V4L2_PIX_FMT_RGB24:
219 row_coeff = 3;
220 break;
221 }
222
223 sh_vou_reg_a_write(vou_dev, VOUSWR, dataswap);
224 sh_vou_reg_ab_write(vou_dev, VOUAIR, vou_dev->pix.width * row_coeff);
225 sh_vou_schedule_next(vou_dev, vb);
226 }
227
228 static void free_buffer(struct videobuf_queue *vq, struct videobuf_buffer *vb)
229 {
230 BUG_ON(in_interrupt());
231
232 /* Wait until this buffer is no longer in STATE_QUEUED or STATE_ACTIVE */
233 videobuf_waiton(vq, vb, 0, 0);
234 videobuf_dma_contig_free(vq, vb);
235 vb->state = VIDEOBUF_NEEDS_INIT;
236 }
237
238 /* Locking: caller holds fop_lock mutex */
239 static int sh_vou_buf_setup(struct videobuf_queue *vq, unsigned int *count,
240 unsigned int *size)
241 {
242 struct video_device *vdev = vq->priv_data;
243 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
244
245 *size = vou_fmt[vou_dev->pix_idx].bpp * vou_dev->pix.width *
246 vou_dev->pix.height / 8;
247
248 if (*count < 2)
249 *count = 2;
250
251 /* Taking into account maximum frame size, *count will stay >= 2 */
252 if (PAGE_ALIGN(*size) * *count > 4 * 1024 * 1024)
253 *count = 4 * 1024 * 1024 / PAGE_ALIGN(*size);
254
255 dev_dbg(vq->dev, "%s(): count=%d, size=%d\n", __func__, *count, *size);
256
257 return 0;
258 }
259
260 /* Locking: caller holds fop_lock mutex */
261 static int sh_vou_buf_prepare(struct videobuf_queue *vq,
262 struct videobuf_buffer *vb,
263 enum v4l2_field field)
264 {
265 struct video_device *vdev = vq->priv_data;
266 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
267 struct v4l2_pix_format *pix = &vou_dev->pix;
268 int bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
269 int ret;
270
271 dev_dbg(vq->dev, "%s()\n", __func__);
272
273 if (vb->width != pix->width ||
274 vb->height != pix->height ||
275 vb->field != pix->field) {
276 vb->width = pix->width;
277 vb->height = pix->height;
278 vb->field = field;
279 if (vb->state != VIDEOBUF_NEEDS_INIT)
280 free_buffer(vq, vb);
281 }
282
283 vb->size = vb->height * bytes_per_line;
284 if (vb->baddr && vb->bsize < vb->size) {
285 /* User buffer too small */
286 dev_warn(vq->dev, "User buffer too small: [%u] @ %lx\n",
287 vb->bsize, vb->baddr);
288 return -EINVAL;
289 }
290
291 if (vb->state == VIDEOBUF_NEEDS_INIT) {
292 ret = videobuf_iolock(vq, vb, NULL);
293 if (ret < 0) {
294 dev_warn(vq->dev, "IOLOCK buf-type %d: %d\n",
295 vb->memory, ret);
296 return ret;
297 }
298 vb->state = VIDEOBUF_PREPARED;
299 }
300
301 dev_dbg(vq->dev,
302 "%s(): fmt #%d, %u bytes per line, phys 0x%x, type %d, state %d\n",
303 __func__, vou_dev->pix_idx, bytes_per_line,
304 videobuf_to_dma_contig(vb), vb->memory, vb->state);
305
306 return 0;
307 }
308
309 /* Locking: caller holds fop_lock mutex and vq->irqlock spinlock */
310 static void sh_vou_buf_queue(struct videobuf_queue *vq,
311 struct videobuf_buffer *vb)
312 {
313 struct video_device *vdev = vq->priv_data;
314 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
315
316 dev_dbg(vq->dev, "%s()\n", __func__);
317
318 vb->state = VIDEOBUF_QUEUED;
319 list_add_tail(&vb->queue, &vou_dev->queue);
320
321 if (vou_dev->status == SH_VOU_RUNNING) {
322 return;
323 } else if (!vou_dev->active) {
324 vou_dev->active = vb;
325 /* Start from side A: we use mirror addresses, so, set B */
326 sh_vou_reg_a_write(vou_dev, VOURPR, 1);
327 dev_dbg(vq->dev, "%s: first buffer status 0x%x\n", __func__,
328 sh_vou_reg_a_read(vou_dev, VOUSTR));
329 sh_vou_schedule_next(vou_dev, vb);
330 /* Only activate VOU after the second buffer */
331 } else if (vou_dev->active->queue.next == &vb->queue) {
332 /* Second buffer - initialise register side B */
333 sh_vou_reg_a_write(vou_dev, VOURPR, 0);
334 sh_vou_stream_start(vou_dev, vb);
335
336 /* Register side switching with frame VSYNC */
337 sh_vou_reg_a_write(vou_dev, VOURCR, 5);
338 dev_dbg(vq->dev, "%s: second buffer status 0x%x\n", __func__,
339 sh_vou_reg_a_read(vou_dev, VOUSTR));
340
341 /* Enable End-of-Frame (VSYNC) interrupts */
342 sh_vou_reg_a_write(vou_dev, VOUIR, 0x10004);
343 /* Two buffers on the queue - activate the hardware */
344
345 vou_dev->status = SH_VOU_RUNNING;
346 sh_vou_reg_a_write(vou_dev, VOUER, 0x107);
347 }
348 }
349
350 static void sh_vou_buf_release(struct videobuf_queue *vq,
351 struct videobuf_buffer *vb)
352 {
353 struct video_device *vdev = vq->priv_data;
354 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
355 unsigned long flags;
356
357 dev_dbg(vq->dev, "%s()\n", __func__);
358
359 spin_lock_irqsave(&vou_dev->lock, flags);
360
361 if (vou_dev->active == vb) {
362 /* disable output */
363 sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
364 /* ...but the current frame will complete */
365 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
366 vou_dev->active = NULL;
367 }
368
369 if ((vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED)) {
370 vb->state = VIDEOBUF_ERROR;
371 list_del(&vb->queue);
372 }
373
374 spin_unlock_irqrestore(&vou_dev->lock, flags);
375
376 free_buffer(vq, vb);
377 }
378
379 static struct videobuf_queue_ops sh_vou_video_qops = {
380 .buf_setup = sh_vou_buf_setup,
381 .buf_prepare = sh_vou_buf_prepare,
382 .buf_queue = sh_vou_buf_queue,
383 .buf_release = sh_vou_buf_release,
384 };
385
386 /* Video IOCTLs */
387 static int sh_vou_querycap(struct file *file, void *priv,
388 struct v4l2_capability *cap)
389 {
390 struct sh_vou_file *vou_file = priv;
391
392 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
393
394 strlcpy(cap->card, "SuperH VOU", sizeof(cap->card));
395 cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
396 return 0;
397 }
398
399 /* Enumerate formats, that the device can accept from the user */
400 static int sh_vou_enum_fmt_vid_out(struct file *file, void *priv,
401 struct v4l2_fmtdesc *fmt)
402 {
403 struct sh_vou_file *vou_file = priv;
404
405 if (fmt->index >= ARRAY_SIZE(vou_fmt))
406 return -EINVAL;
407
408 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
409
410 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
411 strlcpy(fmt->description, vou_fmt[fmt->index].desc,
412 sizeof(fmt->description));
413 fmt->pixelformat = vou_fmt[fmt->index].pfmt;
414
415 return 0;
416 }
417
418 static int sh_vou_g_fmt_vid_out(struct file *file, void *priv,
419 struct v4l2_format *fmt)
420 {
421 struct video_device *vdev = video_devdata(file);
422 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
423
424 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
425
426 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
427 fmt->fmt.pix = vou_dev->pix;
428
429 return 0;
430 }
431
432 static const unsigned char vou_scale_h_num[] = {1, 9, 2, 9, 4};
433 static const unsigned char vou_scale_h_den[] = {1, 8, 1, 4, 1};
434 static const unsigned char vou_scale_h_fld[] = {0, 2, 1, 3};
435 static const unsigned char vou_scale_v_num[] = {1, 2, 4};
436 static const unsigned char vou_scale_v_den[] = {1, 1, 1};
437 static const unsigned char vou_scale_v_fld[] = {0, 1};
438
439 static void sh_vou_configure_geometry(struct sh_vou_device *vou_dev,
440 int pix_idx, int w_idx, int h_idx)
441 {
442 struct sh_vou_fmt *fmt = vou_fmt + pix_idx;
443 unsigned int black_left, black_top, width_max, height_max,
444 frame_in_height, frame_out_height, frame_out_top;
445 struct v4l2_rect *rect = &vou_dev->rect;
446 struct v4l2_pix_format *pix = &vou_dev->pix;
447 u32 vouvcr = 0, dsr_h, dsr_v;
448
449 if (vou_dev->std & V4L2_STD_525_60) {
450 width_max = 858;
451 height_max = 262;
452 } else {
453 width_max = 864;
454 height_max = 312;
455 }
456
457 frame_in_height = pix->height / 2;
458 frame_out_height = rect->height / 2;
459 frame_out_top = rect->top / 2;
460
461 /*
462 * Cropping scheme: max useful image is 720x480, and the total video
463 * area is 858x525 (NTSC) or 864x625 (PAL). AK8813 / 8814 starts
464 * sampling data beginning with fixed 276th (NTSC) / 288th (PAL) clock,
465 * of which the first 33 / 25 clocks HSYNC must be held active. This
466 * has to be configured in CR[HW]. 1 pixel equals 2 clock periods.
467 * This gives CR[HW] = 16 / 12, VPR[HVP] = 138 / 144, which gives
468 * exactly 858 - 138 = 864 - 144 = 720! We call the out-of-display area,
469 * beyond DSR, specified on the left and top by the VPR register "black
470 * pixels" and out-of-image area (DPR) "background pixels." We fix VPR
471 * at 138 / 144 : 20, because that's the HSYNC timing, that our first
472 * client requires, and that's exactly what leaves us 720 pixels for the
473 * image; we leave VPR[VVP] at default 20 for now, because the client
474 * doesn't seem to have any special requirements for it. Otherwise we
475 * could also set it to max - 240 = 22 / 72. Thus VPR depends only on
476 * the selected standard, and DPR and DSR are selected according to
477 * cropping. Q: how does the client detect the first valid line? Does
478 * HSYNC stay inactive during invalid (black) lines?
479 */
480 black_left = width_max - VOU_MAX_IMAGE_WIDTH;
481 black_top = 20;
482
483 dsr_h = rect->width + rect->left;
484 dsr_v = frame_out_height + frame_out_top;
485
486 dev_dbg(vou_dev->v4l2_dev.dev,
487 "image %ux%u, black %u:%u, offset %u:%u, display %ux%u\n",
488 pix->width, frame_in_height, black_left, black_top,
489 rect->left, frame_out_top, dsr_h, dsr_v);
490
491 /* VOUISR height - half of a frame height in frame mode */
492 sh_vou_reg_ab_write(vou_dev, VOUISR, (pix->width << 16) | frame_in_height);
493 sh_vou_reg_ab_write(vou_dev, VOUVPR, (black_left << 16) | black_top);
494 sh_vou_reg_ab_write(vou_dev, VOUDPR, (rect->left << 16) | frame_out_top);
495 sh_vou_reg_ab_write(vou_dev, VOUDSR, (dsr_h << 16) | dsr_v);
496
497 /*
498 * if necessary, we could set VOUHIR to
499 * max(black_left + dsr_h, width_max) here
500 */
501
502 if (w_idx)
503 vouvcr |= (1 << 15) | (vou_scale_h_fld[w_idx - 1] << 4);
504 if (h_idx)
505 vouvcr |= (1 << 14) | vou_scale_v_fld[h_idx - 1];
506
507 dev_dbg(vou_dev->v4l2_dev.dev, "%s: scaling 0x%x\n", fmt->desc, vouvcr);
508
509 /* To produce a colour bar for testing set bit 23 of VOUVCR */
510 sh_vou_reg_ab_write(vou_dev, VOUVCR, vouvcr);
511 sh_vou_reg_ab_write(vou_dev, VOUDFR,
512 fmt->pkf | (fmt->yf << 8) | (fmt->rgb << 16));
513 }
514
515 struct sh_vou_geometry {
516 struct v4l2_rect output;
517 unsigned int in_width;
518 unsigned int in_height;
519 int scale_idx_h;
520 int scale_idx_v;
521 };
522
523 /*
524 * Find input geometry, that we can use to produce output, closest to the
525 * requested rectangle, using VOU scaling
526 */
527 static void vou_adjust_input(struct sh_vou_geometry *geo, v4l2_std_id std)
528 {
529 /* The compiler cannot know, that best and idx will indeed be set */
530 unsigned int best_err = UINT_MAX, best = 0, img_height_max;
531 int i, idx = 0;
532
533 if (std & V4L2_STD_525_60)
534 img_height_max = 480;
535 else
536 img_height_max = 576;
537
538 /* Image width must be a multiple of 4 */
539 v4l_bound_align_image(&geo->in_width, 0, VOU_MAX_IMAGE_WIDTH, 2,
540 &geo->in_height, 0, img_height_max, 1, 0);
541
542 /* Select scales to come as close as possible to the output image */
543 for (i = ARRAY_SIZE(vou_scale_h_num) - 1; i >= 0; i--) {
544 unsigned int err;
545 unsigned int found = geo->output.width * vou_scale_h_den[i] /
546 vou_scale_h_num[i];
547
548 if (found > VOU_MAX_IMAGE_WIDTH)
549 /* scales increase */
550 break;
551
552 err = abs(found - geo->in_width);
553 if (err < best_err) {
554 best_err = err;
555 idx = i;
556 best = found;
557 }
558 if (!err)
559 break;
560 }
561
562 geo->in_width = best;
563 geo->scale_idx_h = idx;
564
565 best_err = UINT_MAX;
566
567 /* This loop can be replaced with one division */
568 for (i = ARRAY_SIZE(vou_scale_v_num) - 1; i >= 0; i--) {
569 unsigned int err;
570 unsigned int found = geo->output.height * vou_scale_v_den[i] /
571 vou_scale_v_num[i];
572
573 if (found > img_height_max)
574 /* scales increase */
575 break;
576
577 err = abs(found - geo->in_height);
578 if (err < best_err) {
579 best_err = err;
580 idx = i;
581 best = found;
582 }
583 if (!err)
584 break;
585 }
586
587 geo->in_height = best;
588 geo->scale_idx_v = idx;
589 }
590
591 /*
592 * Find output geometry, that we can produce, using VOU scaling, closest to
593 * the requested rectangle
594 */
595 static void vou_adjust_output(struct sh_vou_geometry *geo, v4l2_std_id std)
596 {
597 unsigned int best_err = UINT_MAX, best, width_max, height_max,
598 img_height_max;
599 int i, idx;
600
601 if (std & V4L2_STD_525_60) {
602 width_max = 858;
603 height_max = 262 * 2;
604 img_height_max = 480;
605 } else {
606 width_max = 864;
607 height_max = 312 * 2;
608 img_height_max = 576;
609 }
610
611 /* Select scales to come as close as possible to the output image */
612 for (i = 0; i < ARRAY_SIZE(vou_scale_h_num); i++) {
613 unsigned int err;
614 unsigned int found = geo->in_width * vou_scale_h_num[i] /
615 vou_scale_h_den[i];
616
617 if (found > VOU_MAX_IMAGE_WIDTH)
618 /* scales increase */
619 break;
620
621 err = abs(found - geo->output.width);
622 if (err < best_err) {
623 best_err = err;
624 idx = i;
625 best = found;
626 }
627 if (!err)
628 break;
629 }
630
631 geo->output.width = best;
632 geo->scale_idx_h = idx;
633 if (geo->output.left + best > width_max)
634 geo->output.left = width_max - best;
635
636 pr_debug("%s(): W %u * %u/%u = %u\n", __func__, geo->in_width,
637 vou_scale_h_num[idx], vou_scale_h_den[idx], best);
638
639 best_err = UINT_MAX;
640
641 /* This loop can be replaced with one division */
642 for (i = 0; i < ARRAY_SIZE(vou_scale_v_num); i++) {
643 unsigned int err;
644 unsigned int found = geo->in_height * vou_scale_v_num[i] /
645 vou_scale_v_den[i];
646
647 if (found > img_height_max)
648 /* scales increase */
649 break;
650
651 err = abs(found - geo->output.height);
652 if (err < best_err) {
653 best_err = err;
654 idx = i;
655 best = found;
656 }
657 if (!err)
658 break;
659 }
660
661 geo->output.height = best;
662 geo->scale_idx_v = idx;
663 if (geo->output.top + best > height_max)
664 geo->output.top = height_max - best;
665
666 pr_debug("%s(): H %u * %u/%u = %u\n", __func__, geo->in_height,
667 vou_scale_v_num[idx], vou_scale_v_den[idx], best);
668 }
669
670 static int sh_vou_s_fmt_vid_out(struct file *file, void *priv,
671 struct v4l2_format *fmt)
672 {
673 struct video_device *vdev = video_devdata(file);
674 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
675 struct v4l2_pix_format *pix = &fmt->fmt.pix;
676 unsigned int img_height_max;
677 int pix_idx;
678 struct sh_vou_geometry geo;
679 struct v4l2_mbus_framefmt mbfmt = {
680 /* Revisit: is this the correct code? */
681 .code = V4L2_MBUS_FMT_YUYV8_2X8,
682 .field = V4L2_FIELD_INTERLACED,
683 .colorspace = V4L2_COLORSPACE_SMPTE170M,
684 };
685 int ret;
686
687 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
688 vou_dev->rect.width, vou_dev->rect.height,
689 pix->width, pix->height);
690
691 if (pix->field == V4L2_FIELD_ANY)
692 pix->field = V4L2_FIELD_NONE;
693
694 if (fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
695 pix->field != V4L2_FIELD_NONE)
696 return -EINVAL;
697
698 for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
699 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
700 break;
701
702 if (pix_idx == ARRAY_SIZE(vou_fmt))
703 return -EINVAL;
704
705 if (vou_dev->std & V4L2_STD_525_60)
706 img_height_max = 480;
707 else
708 img_height_max = 576;
709
710 /* Image width must be a multiple of 4 */
711 v4l_bound_align_image(&pix->width, 0, VOU_MAX_IMAGE_WIDTH, 2,
712 &pix->height, 0, img_height_max, 1, 0);
713
714 geo.in_width = pix->width;
715 geo.in_height = pix->height;
716 geo.output = vou_dev->rect;
717
718 vou_adjust_output(&geo, vou_dev->std);
719
720 mbfmt.width = geo.output.width;
721 mbfmt.height = geo.output.height;
722 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
723 s_mbus_fmt, &mbfmt);
724 /* Must be implemented, so, don't check for -ENOIOCTLCMD */
725 if (ret < 0)
726 return ret;
727
728 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
729 geo.output.width, geo.output.height, mbfmt.width, mbfmt.height);
730
731 /* Sanity checks */
732 if ((unsigned)mbfmt.width > VOU_MAX_IMAGE_WIDTH ||
733 (unsigned)mbfmt.height > img_height_max ||
734 mbfmt.code != V4L2_MBUS_FMT_YUYV8_2X8)
735 return -EIO;
736
737 if (mbfmt.width != geo.output.width ||
738 mbfmt.height != geo.output.height) {
739 geo.output.width = mbfmt.width;
740 geo.output.height = mbfmt.height;
741
742 vou_adjust_input(&geo, vou_dev->std);
743 }
744
745 /* We tried to preserve output rectangle, but it could have changed */
746 vou_dev->rect = geo.output;
747 pix->width = geo.in_width;
748 pix->height = geo.in_height;
749
750 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u\n", __func__,
751 pix->width, pix->height);
752
753 vou_dev->pix_idx = pix_idx;
754
755 vou_dev->pix = *pix;
756
757 sh_vou_configure_geometry(vou_dev, pix_idx,
758 geo.scale_idx_h, geo.scale_idx_v);
759
760 return 0;
761 }
762
763 static int sh_vou_try_fmt_vid_out(struct file *file, void *priv,
764 struct v4l2_format *fmt)
765 {
766 struct sh_vou_file *vou_file = priv;
767 struct v4l2_pix_format *pix = &fmt->fmt.pix;
768 int i;
769
770 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
771
772 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
773 pix->field = V4L2_FIELD_NONE;
774
775 v4l_bound_align_image(&pix->width, 0, VOU_MAX_IMAGE_WIDTH, 1,
776 &pix->height, 0, VOU_MAX_IMAGE_HEIGHT, 1, 0);
777
778 for (i = 0; ARRAY_SIZE(vou_fmt); i++)
779 if (vou_fmt[i].pfmt == pix->pixelformat)
780 return 0;
781
782 pix->pixelformat = vou_fmt[0].pfmt;
783
784 return 0;
785 }
786
787 static int sh_vou_reqbufs(struct file *file, void *priv,
788 struct v4l2_requestbuffers *req)
789 {
790 struct sh_vou_file *vou_file = priv;
791
792 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
793
794 if (req->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
795 return -EINVAL;
796
797 return videobuf_reqbufs(&vou_file->vbq, req);
798 }
799
800 static int sh_vou_querybuf(struct file *file, void *priv,
801 struct v4l2_buffer *b)
802 {
803 struct sh_vou_file *vou_file = priv;
804
805 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
806
807 return videobuf_querybuf(&vou_file->vbq, b);
808 }
809
810 static int sh_vou_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
811 {
812 struct sh_vou_file *vou_file = priv;
813
814 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
815
816 return videobuf_qbuf(&vou_file->vbq, b);
817 }
818
819 static int sh_vou_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
820 {
821 struct sh_vou_file *vou_file = priv;
822
823 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
824
825 return videobuf_dqbuf(&vou_file->vbq, b, file->f_flags & O_NONBLOCK);
826 }
827
828 static int sh_vou_streamon(struct file *file, void *priv,
829 enum v4l2_buf_type buftype)
830 {
831 struct video_device *vdev = video_devdata(file);
832 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
833 struct sh_vou_file *vou_file = priv;
834 int ret;
835
836 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
837
838 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
839 video, s_stream, 1);
840 if (ret < 0 && ret != -ENOIOCTLCMD)
841 return ret;
842
843 /* This calls our .buf_queue() (== sh_vou_buf_queue) */
844 return videobuf_streamon(&vou_file->vbq);
845 }
846
847 static int sh_vou_streamoff(struct file *file, void *priv,
848 enum v4l2_buf_type buftype)
849 {
850 struct video_device *vdev = video_devdata(file);
851 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
852 struct sh_vou_file *vou_file = priv;
853
854 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
855
856 /*
857 * This calls buf_release from host driver's videobuf_queue_ops for all
858 * remaining buffers. When the last buffer is freed, stop streaming
859 */
860 videobuf_streamoff(&vou_file->vbq);
861 v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video, s_stream, 0);
862
863 return 0;
864 }
865
866 static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)
867 {
868 switch (bus_fmt) {
869 default:
870 pr_warning("%s(): Invalid bus-format code %d, using default 8-bit\n",
871 __func__, bus_fmt);
872 case SH_VOU_BUS_8BIT:
873 return 1;
874 case SH_VOU_BUS_16BIT:
875 return 0;
876 case SH_VOU_BUS_BT656:
877 return 3;
878 }
879 }
880
881 static int sh_vou_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
882 {
883 struct video_device *vdev = video_devdata(file);
884 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
885 int ret;
886
887 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): 0x%llx\n", __func__, *std_id);
888
889 if (*std_id & ~vdev->tvnorms)
890 return -EINVAL;
891
892 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
893 s_std_output, *std_id);
894 /* Shall we continue, if the subdev doesn't support .s_std_output()? */
895 if (ret < 0 && ret != -ENOIOCTLCMD)
896 return ret;
897
898 if (*std_id & V4L2_STD_525_60)
899 sh_vou_reg_ab_set(vou_dev, VOUCR,
900 sh_vou_ntsc_mode(vou_dev->pdata->bus_fmt) << 29, 7 << 29);
901 else
902 sh_vou_reg_ab_set(vou_dev, VOUCR, 5 << 29, 7 << 29);
903
904 vou_dev->std = *std_id;
905
906 return 0;
907 }
908
909 static int sh_vou_g_std(struct file *file, void *priv, v4l2_std_id *std)
910 {
911 struct video_device *vdev = video_devdata(file);
912 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
913
914 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
915
916 *std = vou_dev->std;
917
918 return 0;
919 }
920
921 static int sh_vou_g_crop(struct file *file, void *fh, struct v4l2_crop *a)
922 {
923 struct video_device *vdev = video_devdata(file);
924 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
925
926 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
927
928 a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
929 a->c = vou_dev->rect;
930
931 return 0;
932 }
933
934 /* Assume a dull encoder, do all the work ourselves. */
935 static int sh_vou_s_crop(struct file *file, void *fh, struct v4l2_crop *a)
936 {
937 struct video_device *vdev = video_devdata(file);
938 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
939 struct v4l2_rect *rect = &a->c;
940 struct v4l2_crop sd_crop = {.type = V4L2_BUF_TYPE_VIDEO_OUTPUT};
941 struct v4l2_pix_format *pix = &vou_dev->pix;
942 struct sh_vou_geometry geo;
943 struct v4l2_mbus_framefmt mbfmt = {
944 /* Revisit: is this the correct code? */
945 .code = V4L2_MBUS_FMT_YUYV8_2X8,
946 .field = V4L2_FIELD_INTERLACED,
947 .colorspace = V4L2_COLORSPACE_SMPTE170M,
948 };
949 unsigned int img_height_max;
950 int ret;
951
952 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u@%u:%u\n", __func__,
953 rect->width, rect->height, rect->left, rect->top);
954
955 if (a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
956 return -EINVAL;
957
958 if (vou_dev->std & V4L2_STD_525_60)
959 img_height_max = 480;
960 else
961 img_height_max = 576;
962
963 v4l_bound_align_image(&rect->width, 0, VOU_MAX_IMAGE_WIDTH, 1,
964 &rect->height, 0, img_height_max, 1, 0);
965
966 if (rect->width + rect->left > VOU_MAX_IMAGE_WIDTH)
967 rect->left = VOU_MAX_IMAGE_WIDTH - rect->width;
968
969 if (rect->height + rect->top > img_height_max)
970 rect->top = img_height_max - rect->height;
971
972 geo.output = *rect;
973 geo.in_width = pix->width;
974 geo.in_height = pix->height;
975
976 /* Configure the encoder one-to-one, position at 0, ignore errors */
977 sd_crop.c.width = geo.output.width;
978 sd_crop.c.height = geo.output.height;
979 /*
980 * We first issue a S_CROP, so that the subsequent S_FMT delivers the
981 * final encoder configuration.
982 */
983 v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
984 s_crop, &sd_crop);
985 mbfmt.width = geo.output.width;
986 mbfmt.height = geo.output.height;
987 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
988 s_mbus_fmt, &mbfmt);
989 /* Must be implemented, so, don't check for -ENOIOCTLCMD */
990 if (ret < 0)
991 return ret;
992
993 /* Sanity checks */
994 if ((unsigned)mbfmt.width > VOU_MAX_IMAGE_WIDTH ||
995 (unsigned)mbfmt.height > img_height_max ||
996 mbfmt.code != V4L2_MBUS_FMT_YUYV8_2X8)
997 return -EIO;
998
999 geo.output.width = mbfmt.width;
1000 geo.output.height = mbfmt.height;
1001
1002 /*
1003 * No down-scaling. According to the API, current call has precedence:
1004 * http://v4l2spec.bytesex.org/spec/x1904.htm#AEN1954 paragraph two.
1005 */
1006 vou_adjust_input(&geo, vou_dev->std);
1007
1008 /* We tried to preserve output rectangle, but it could have changed */
1009 vou_dev->rect = geo.output;
1010 pix->width = geo.in_width;
1011 pix->height = geo.in_height;
1012
1013 sh_vou_configure_geometry(vou_dev, vou_dev->pix_idx,
1014 geo.scale_idx_h, geo.scale_idx_v);
1015
1016 return 0;
1017 }
1018
1019 /*
1020 * Total field: NTSC 858 x 2 * 262/263, PAL 864 x 2 * 312/313, default rectangle
1021 * is the initial register values, height takes the interlaced format into
1022 * account. The actual image can only go up to 720 x 2 * 240, So, VOUVPR can
1023 * actually only meaningfully contain values <= 720 and <= 240 respectively, and
1024 * not <= 864 and <= 312.
1025 */
1026 static int sh_vou_cropcap(struct file *file, void *priv,
1027 struct v4l2_cropcap *a)
1028 {
1029 struct sh_vou_file *vou_file = priv;
1030
1031 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1032
1033 a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1034 a->bounds.left = 0;
1035 a->bounds.top = 0;
1036 a->bounds.width = VOU_MAX_IMAGE_WIDTH;
1037 a->bounds.height = VOU_MAX_IMAGE_HEIGHT;
1038 /* Default = max, set VOUDPR = 0, which is not hardware default */
1039 a->defrect.left = 0;
1040 a->defrect.top = 0;
1041 a->defrect.width = VOU_MAX_IMAGE_WIDTH;
1042 a->defrect.height = VOU_MAX_IMAGE_HEIGHT;
1043 a->pixelaspect.numerator = 1;
1044 a->pixelaspect.denominator = 1;
1045
1046 return 0;
1047 }
1048
1049 static irqreturn_t sh_vou_isr(int irq, void *dev_id)
1050 {
1051 struct sh_vou_device *vou_dev = dev_id;
1052 static unsigned long j;
1053 struct videobuf_buffer *vb;
1054 static int cnt;
1055 static int side;
1056 u32 irq_status = sh_vou_reg_a_read(vou_dev, VOUIR), masked;
1057 u32 vou_status = sh_vou_reg_a_read(vou_dev, VOUSTR);
1058
1059 if (!(irq_status & 0x300)) {
1060 if (printk_timed_ratelimit(&j, 500))
1061 dev_warn(vou_dev->v4l2_dev.dev, "IRQ status 0x%x!\n",
1062 irq_status);
1063 return IRQ_NONE;
1064 }
1065
1066 spin_lock(&vou_dev->lock);
1067 if (!vou_dev->active || list_empty(&vou_dev->queue)) {
1068 if (printk_timed_ratelimit(&j, 500))
1069 dev_warn(vou_dev->v4l2_dev.dev,
1070 "IRQ without active buffer: %x!\n", irq_status);
1071 /* Just ack: buf_release will disable further interrupts */
1072 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x300);
1073 spin_unlock(&vou_dev->lock);
1074 return IRQ_HANDLED;
1075 }
1076
1077 masked = ~(0x300 & irq_status) & irq_status & 0x30304;
1078 dev_dbg(vou_dev->v4l2_dev.dev,
1079 "IRQ status 0x%x -> 0x%x, VOU status 0x%x, cnt %d\n",
1080 irq_status, masked, vou_status, cnt);
1081
1082 cnt++;
1083 side = vou_status & 0x10000;
1084
1085 /* Clear only set interrupts */
1086 sh_vou_reg_a_write(vou_dev, VOUIR, masked);
1087
1088 vb = vou_dev->active;
1089 list_del(&vb->queue);
1090
1091 vb->state = VIDEOBUF_DONE;
1092 do_gettimeofday(&vb->ts);
1093 vb->field_count++;
1094 wake_up(&vb->done);
1095
1096 if (list_empty(&vou_dev->queue)) {
1097 /* Stop VOU */
1098 dev_dbg(vou_dev->v4l2_dev.dev, "%s: queue empty after %d\n",
1099 __func__, cnt);
1100 sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
1101 vou_dev->active = NULL;
1102 vou_dev->status = SH_VOU_INITIALISING;
1103 /* Disable End-of-Frame (VSYNC) interrupts */
1104 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
1105 spin_unlock(&vou_dev->lock);
1106 return IRQ_HANDLED;
1107 }
1108
1109 vou_dev->active = list_entry(vou_dev->queue.next,
1110 struct videobuf_buffer, queue);
1111
1112 if (vou_dev->active->queue.next != &vou_dev->queue) {
1113 struct videobuf_buffer *new = list_entry(vou_dev->active->queue.next,
1114 struct videobuf_buffer, queue);
1115 sh_vou_schedule_next(vou_dev, new);
1116 }
1117
1118 spin_unlock(&vou_dev->lock);
1119
1120 return IRQ_HANDLED;
1121 }
1122
1123 static int sh_vou_hw_init(struct sh_vou_device *vou_dev)
1124 {
1125 struct sh_vou_pdata *pdata = vou_dev->pdata;
1126 u32 voucr = sh_vou_ntsc_mode(pdata->bus_fmt) << 29;
1127 int i = 100;
1128
1129 /* Disable all IRQs */
1130 sh_vou_reg_a_write(vou_dev, VOUIR, 0);
1131
1132 /* Reset VOU interfaces - registers unaffected */
1133 sh_vou_reg_a_write(vou_dev, VOUSRR, 0x101);
1134 while (--i && (sh_vou_reg_a_read(vou_dev, VOUSRR) & 0x101))
1135 udelay(1);
1136
1137 if (!i)
1138 return -ETIMEDOUT;
1139
1140 dev_dbg(vou_dev->v4l2_dev.dev, "Reset took %dus\n", 100 - i);
1141
1142 if (pdata->flags & SH_VOU_PCLK_FALLING)
1143 voucr |= 1 << 28;
1144 if (pdata->flags & SH_VOU_HSYNC_LOW)
1145 voucr |= 1 << 27;
1146 if (pdata->flags & SH_VOU_VSYNC_LOW)
1147 voucr |= 1 << 26;
1148 sh_vou_reg_ab_set(vou_dev, VOUCR, voucr, 0xfc000000);
1149
1150 /* Manual register side switching at first */
1151 sh_vou_reg_a_write(vou_dev, VOURCR, 4);
1152 /* Default - fixed HSYNC length, can be made configurable is required */
1153 sh_vou_reg_ab_write(vou_dev, VOUMSR, 0x800000);
1154
1155 return 0;
1156 }
1157
1158 /* File operations */
1159 static int sh_vou_open(struct file *file)
1160 {
1161 struct video_device *vdev = video_devdata(file);
1162 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1163 struct sh_vou_file *vou_file = kzalloc(sizeof(struct sh_vou_file),
1164 GFP_KERNEL);
1165
1166 if (!vou_file)
1167 return -ENOMEM;
1168
1169 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
1170
1171 file->private_data = vou_file;
1172
1173 if (atomic_inc_return(&vou_dev->use_count) == 1) {
1174 int ret;
1175 /* First open */
1176 vou_dev->status = SH_VOU_INITIALISING;
1177 pm_runtime_get_sync(vdev->v4l2_dev->dev);
1178 ret = sh_vou_hw_init(vou_dev);
1179 if (ret < 0) {
1180 atomic_dec(&vou_dev->use_count);
1181 pm_runtime_put(vdev->v4l2_dev->dev);
1182 vou_dev->status = SH_VOU_IDLE;
1183 return ret;
1184 }
1185 }
1186
1187 videobuf_queue_dma_contig_init(&vou_file->vbq, &sh_vou_video_qops,
1188 vou_dev->v4l2_dev.dev, &vou_dev->lock,
1189 V4L2_BUF_TYPE_VIDEO_OUTPUT,
1190 V4L2_FIELD_NONE,
1191 sizeof(struct videobuf_buffer), vdev,
1192 &vou_dev->fop_lock);
1193
1194 return 0;
1195 }
1196
1197 static int sh_vou_release(struct file *file)
1198 {
1199 struct video_device *vdev = video_devdata(file);
1200 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1201 struct sh_vou_file *vou_file = file->private_data;
1202
1203 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1204
1205 if (!atomic_dec_return(&vou_dev->use_count)) {
1206 /* Last close */
1207 vou_dev->status = SH_VOU_IDLE;
1208 sh_vou_reg_a_set(vou_dev, VOUER, 0, 0x101);
1209 pm_runtime_put(vdev->v4l2_dev->dev);
1210 }
1211
1212 file->private_data = NULL;
1213 kfree(vou_file);
1214
1215 return 0;
1216 }
1217
1218 static int sh_vou_mmap(struct file *file, struct vm_area_struct *vma)
1219 {
1220 struct sh_vou_file *vou_file = file->private_data;
1221
1222 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1223
1224 return videobuf_mmap_mapper(&vou_file->vbq, vma);
1225 }
1226
1227 static unsigned int sh_vou_poll(struct file *file, poll_table *wait)
1228 {
1229 struct sh_vou_file *vou_file = file->private_data;
1230
1231 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1232
1233 return videobuf_poll_stream(file, &vou_file->vbq, wait);
1234 }
1235
1236 static int sh_vou_g_chip_ident(struct file *file, void *fh,
1237 struct v4l2_dbg_chip_ident *id)
1238 {
1239 struct video_device *vdev = video_devdata(file);
1240 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1241
1242 return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, g_chip_ident, id);
1243 }
1244
1245 #ifdef CONFIG_VIDEO_ADV_DEBUG
1246 static int sh_vou_g_register(struct file *file, void *fh,
1247 struct v4l2_dbg_register *reg)
1248 {
1249 struct video_device *vdev = video_devdata(file);
1250 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1251
1252 return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, g_register, reg);
1253 }
1254
1255 static int sh_vou_s_register(struct file *file, void *fh,
1256 struct v4l2_dbg_register *reg)
1257 {
1258 struct video_device *vdev = video_devdata(file);
1259 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1260
1261 return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, s_register, reg);
1262 }
1263 #endif
1264
1265 /* sh_vou display ioctl operations */
1266 static const struct v4l2_ioctl_ops sh_vou_ioctl_ops = {
1267 .vidioc_querycap = sh_vou_querycap,
1268 .vidioc_enum_fmt_vid_out = sh_vou_enum_fmt_vid_out,
1269 .vidioc_g_fmt_vid_out = sh_vou_g_fmt_vid_out,
1270 .vidioc_s_fmt_vid_out = sh_vou_s_fmt_vid_out,
1271 .vidioc_try_fmt_vid_out = sh_vou_try_fmt_vid_out,
1272 .vidioc_reqbufs = sh_vou_reqbufs,
1273 .vidioc_querybuf = sh_vou_querybuf,
1274 .vidioc_qbuf = sh_vou_qbuf,
1275 .vidioc_dqbuf = sh_vou_dqbuf,
1276 .vidioc_streamon = sh_vou_streamon,
1277 .vidioc_streamoff = sh_vou_streamoff,
1278 .vidioc_s_std = sh_vou_s_std,
1279 .vidioc_g_std = sh_vou_g_std,
1280 .vidioc_cropcap = sh_vou_cropcap,
1281 .vidioc_g_crop = sh_vou_g_crop,
1282 .vidioc_s_crop = sh_vou_s_crop,
1283 .vidioc_g_chip_ident = sh_vou_g_chip_ident,
1284 #ifdef CONFIG_VIDEO_ADV_DEBUG
1285 .vidioc_g_register = sh_vou_g_register,
1286 .vidioc_s_register = sh_vou_s_register,
1287 #endif
1288 };
1289
1290 static const struct v4l2_file_operations sh_vou_fops = {
1291 .owner = THIS_MODULE,
1292 .open = sh_vou_open,
1293 .release = sh_vou_release,
1294 .unlocked_ioctl = video_ioctl2,
1295 .mmap = sh_vou_mmap,
1296 .poll = sh_vou_poll,
1297 };
1298
1299 static const struct video_device sh_vou_video_template = {
1300 .name = "sh_vou",
1301 .fops = &sh_vou_fops,
1302 .ioctl_ops = &sh_vou_ioctl_ops,
1303 .tvnorms = V4L2_STD_525_60, /* PAL only supported in 8-bit non-bt656 mode */
1304 .current_norm = V4L2_STD_NTSC_M,
1305 };
1306
1307 static int __devinit sh_vou_probe(struct platform_device *pdev)
1308 {
1309 struct sh_vou_pdata *vou_pdata = pdev->dev.platform_data;
1310 struct v4l2_rect *rect;
1311 struct v4l2_pix_format *pix;
1312 struct i2c_adapter *i2c_adap;
1313 struct video_device *vdev;
1314 struct sh_vou_device *vou_dev;
1315 struct resource *reg_res, *region;
1316 struct v4l2_subdev *subdev;
1317 int irq, ret;
1318
1319 reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1320 irq = platform_get_irq(pdev, 0);
1321
1322 if (!vou_pdata || !reg_res || irq <= 0) {
1323 dev_err(&pdev->dev, "Insufficient VOU platform information.\n");
1324 return -ENODEV;
1325 }
1326
1327 vou_dev = kzalloc(sizeof(*vou_dev), GFP_KERNEL);
1328 if (!vou_dev)
1329 return -ENOMEM;
1330
1331 INIT_LIST_HEAD(&vou_dev->queue);
1332 spin_lock_init(&vou_dev->lock);
1333 mutex_init(&vou_dev->fop_lock);
1334 atomic_set(&vou_dev->use_count, 0);
1335 vou_dev->pdata = vou_pdata;
1336 vou_dev->status = SH_VOU_IDLE;
1337
1338 rect = &vou_dev->rect;
1339 pix = &vou_dev->pix;
1340
1341 /* Fill in defaults */
1342 vou_dev->std = sh_vou_video_template.current_norm;
1343 rect->left = 0;
1344 rect->top = 0;
1345 rect->width = VOU_MAX_IMAGE_WIDTH;
1346 rect->height = 480;
1347 pix->width = VOU_MAX_IMAGE_WIDTH;
1348 pix->height = 480;
1349 pix->pixelformat = V4L2_PIX_FMT_YVYU;
1350 pix->field = V4L2_FIELD_NONE;
1351 pix->bytesperline = VOU_MAX_IMAGE_WIDTH * 2;
1352 pix->sizeimage = VOU_MAX_IMAGE_WIDTH * 2 * 480;
1353 pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
1354
1355 region = request_mem_region(reg_res->start, resource_size(reg_res),
1356 pdev->name);
1357 if (!region) {
1358 dev_err(&pdev->dev, "VOU region already claimed\n");
1359 ret = -EBUSY;
1360 goto ereqmemreg;
1361 }
1362
1363 vou_dev->base = ioremap(reg_res->start, resource_size(reg_res));
1364 if (!vou_dev->base) {
1365 ret = -ENOMEM;
1366 goto emap;
1367 }
1368
1369 ret = request_irq(irq, sh_vou_isr, 0, "vou", vou_dev);
1370 if (ret < 0)
1371 goto ereqirq;
1372
1373 ret = v4l2_device_register(&pdev->dev, &vou_dev->v4l2_dev);
1374 if (ret < 0) {
1375 dev_err(&pdev->dev, "Error registering v4l2 device\n");
1376 goto ev4l2devreg;
1377 }
1378
1379 /* Allocate memory for video device */
1380 vdev = video_device_alloc();
1381 if (vdev == NULL) {
1382 ret = -ENOMEM;
1383 goto evdevalloc;
1384 }
1385
1386 *vdev = sh_vou_video_template;
1387 if (vou_pdata->bus_fmt == SH_VOU_BUS_8BIT)
1388 vdev->tvnorms |= V4L2_STD_PAL;
1389 vdev->v4l2_dev = &vou_dev->v4l2_dev;
1390 vdev->release = video_device_release;
1391 vdev->lock = &vou_dev->fop_lock;
1392
1393 vou_dev->vdev = vdev;
1394 video_set_drvdata(vdev, vou_dev);
1395
1396 pm_runtime_enable(&pdev->dev);
1397 pm_runtime_resume(&pdev->dev);
1398
1399 i2c_adap = i2c_get_adapter(vou_pdata->i2c_adap);
1400 if (!i2c_adap) {
1401 ret = -ENODEV;
1402 goto ei2cgadap;
1403 }
1404
1405 ret = sh_vou_hw_init(vou_dev);
1406 if (ret < 0)
1407 goto ereset;
1408
1409 subdev = v4l2_i2c_new_subdev_board(&vou_dev->v4l2_dev, i2c_adap,
1410 vou_pdata->board_info, NULL);
1411 if (!subdev) {
1412 ret = -ENOMEM;
1413 goto ei2cnd;
1414 }
1415
1416 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1417 if (ret < 0)
1418 goto evregdev;
1419
1420 return 0;
1421
1422 evregdev:
1423 ei2cnd:
1424 ereset:
1425 i2c_put_adapter(i2c_adap);
1426 ei2cgadap:
1427 video_device_release(vdev);
1428 pm_runtime_disable(&pdev->dev);
1429 evdevalloc:
1430 v4l2_device_unregister(&vou_dev->v4l2_dev);
1431 ev4l2devreg:
1432 free_irq(irq, vou_dev);
1433 ereqirq:
1434 iounmap(vou_dev->base);
1435 emap:
1436 release_mem_region(reg_res->start, resource_size(reg_res));
1437 ereqmemreg:
1438 kfree(vou_dev);
1439 return ret;
1440 }
1441
1442 static int __devexit sh_vou_remove(struct platform_device *pdev)
1443 {
1444 int irq = platform_get_irq(pdev, 0);
1445 struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1446 struct sh_vou_device *vou_dev = container_of(v4l2_dev,
1447 struct sh_vou_device, v4l2_dev);
1448 struct v4l2_subdev *sd = list_entry(v4l2_dev->subdevs.next,
1449 struct v4l2_subdev, list);
1450 struct i2c_client *client = v4l2_get_subdevdata(sd);
1451 struct resource *reg_res;
1452
1453 if (irq > 0)
1454 free_irq(irq, vou_dev);
1455 pm_runtime_disable(&pdev->dev);
1456 video_unregister_device(vou_dev->vdev);
1457 i2c_put_adapter(client->adapter);
1458 v4l2_device_unregister(&vou_dev->v4l2_dev);
1459 iounmap(vou_dev->base);
1460 reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1461 if (reg_res)
1462 release_mem_region(reg_res->start, resource_size(reg_res));
1463 kfree(vou_dev);
1464 return 0;
1465 }
1466
1467 static struct platform_driver __refdata sh_vou = {
1468 .remove = __devexit_p(sh_vou_remove),
1469 .driver = {
1470 .name = "sh-vou",
1471 .owner = THIS_MODULE,
1472 },
1473 };
1474
1475 static int __init sh_vou_init(void)
1476 {
1477 return platform_driver_probe(&sh_vou, sh_vou_probe);
1478 }
1479
1480 static void __exit sh_vou_exit(void)
1481 {
1482 platform_driver_unregister(&sh_vou);
1483 }
1484
1485 module_init(sh_vou_init);
1486 module_exit(sh_vou_exit);
1487
1488 MODULE_DESCRIPTION("SuperH VOU driver");
1489 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1490 MODULE_LICENSE("GPL v2");
1491 MODULE_VERSION("0.1.0");
1492 MODULE_ALIAS("platform:sh-vou");
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