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Merge branch 'for-john' of git://git.kernel.org/pub/scm/linux/kernel/git/jberg/mac802...
[mirror_ubuntu-bionic-kernel.git] / drivers / media / platform / sh_vou.c
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 #include <linux/module.h>
24
25 #include <media/sh_vou.h>
26 #include <media/v4l2-common.h>
27 #include <media/v4l2-device.h>
28 #include <media/v4l2-ioctl.h>
29 #include <media/v4l2-mediabus.h>
30 #include <media/videobuf-dma-contig.h>
31
32 /* Mirror addresses are not available for all registers */
33 #define VOUER 0
34 #define VOUCR 4
35 #define VOUSTR 8
36 #define VOUVCR 0xc
37 #define VOUISR 0x10
38 #define VOUBCR 0x14
39 #define VOUDPR 0x18
40 #define VOUDSR 0x1c
41 #define VOUVPR 0x20
42 #define VOUIR 0x24
43 #define VOUSRR 0x28
44 #define VOUMSR 0x2c
45 #define VOUHIR 0x30
46 #define VOUDFR 0x34
47 #define VOUAD1R 0x38
48 #define VOUAD2R 0x3c
49 #define VOUAIR 0x40
50 #define VOUSWR 0x44
51 #define VOURCR 0x48
52 #define VOURPR 0x50
53
54 enum sh_vou_status {
55 SH_VOU_IDLE,
56 SH_VOU_INITIALISING,
57 SH_VOU_RUNNING,
58 };
59
60 #define VOU_MAX_IMAGE_WIDTH 720
61 #define VOU_MAX_IMAGE_HEIGHT 576
62
63 struct sh_vou_device {
64 struct v4l2_device v4l2_dev;
65 struct video_device *vdev;
66 atomic_t use_count;
67 struct sh_vou_pdata *pdata;
68 spinlock_t lock;
69 void __iomem *base;
70 /* State information */
71 struct v4l2_pix_format pix;
72 struct v4l2_rect rect;
73 struct list_head queue;
74 v4l2_std_id std;
75 int pix_idx;
76 struct videobuf_buffer *active;
77 enum sh_vou_status status;
78 struct mutex fop_lock;
79 };
80
81 struct sh_vou_file {
82 struct videobuf_queue vbq;
83 };
84
85 /* Register access routines for sides A, B and mirror addresses */
86 static void sh_vou_reg_a_write(struct sh_vou_device *vou_dev, unsigned int reg,
87 u32 value)
88 {
89 __raw_writel(value, vou_dev->base + reg);
90 }
91
92 static void sh_vou_reg_ab_write(struct sh_vou_device *vou_dev, unsigned int reg,
93 u32 value)
94 {
95 __raw_writel(value, vou_dev->base + reg);
96 __raw_writel(value, vou_dev->base + reg + 0x1000);
97 }
98
99 static void sh_vou_reg_m_write(struct sh_vou_device *vou_dev, unsigned int reg,
100 u32 value)
101 {
102 __raw_writel(value, vou_dev->base + reg + 0x2000);
103 }
104
105 static u32 sh_vou_reg_a_read(struct sh_vou_device *vou_dev, unsigned int reg)
106 {
107 return __raw_readl(vou_dev->base + reg);
108 }
109
110 static void sh_vou_reg_a_set(struct sh_vou_device *vou_dev, unsigned int reg,
111 u32 value, u32 mask)
112 {
113 u32 old = __raw_readl(vou_dev->base + reg);
114
115 value = (value & mask) | (old & ~mask);
116 __raw_writel(value, vou_dev->base + reg);
117 }
118
119 static void sh_vou_reg_b_set(struct sh_vou_device *vou_dev, unsigned int reg,
120 u32 value, u32 mask)
121 {
122 sh_vou_reg_a_set(vou_dev, reg + 0x1000, value, mask);
123 }
124
125 static void sh_vou_reg_ab_set(struct sh_vou_device *vou_dev, unsigned int reg,
126 u32 value, u32 mask)
127 {
128 sh_vou_reg_a_set(vou_dev, reg, value, mask);
129 sh_vou_reg_b_set(vou_dev, reg, value, mask);
130 }
131
132 struct sh_vou_fmt {
133 u32 pfmt;
134 char *desc;
135 unsigned char bpp;
136 unsigned char rgb;
137 unsigned char yf;
138 unsigned char pkf;
139 };
140
141 /* Further pixel formats can be added */
142 static struct sh_vou_fmt vou_fmt[] = {
143 {
144 .pfmt = V4L2_PIX_FMT_NV12,
145 .bpp = 12,
146 .desc = "YVU420 planar",
147 .yf = 0,
148 .rgb = 0,
149 },
150 {
151 .pfmt = V4L2_PIX_FMT_NV16,
152 .bpp = 16,
153 .desc = "YVYU planar",
154 .yf = 1,
155 .rgb = 0,
156 },
157 {
158 .pfmt = V4L2_PIX_FMT_RGB24,
159 .bpp = 24,
160 .desc = "RGB24",
161 .pkf = 2,
162 .rgb = 1,
163 },
164 {
165 .pfmt = V4L2_PIX_FMT_RGB565,
166 .bpp = 16,
167 .desc = "RGB565",
168 .pkf = 3,
169 .rgb = 1,
170 },
171 {
172 .pfmt = V4L2_PIX_FMT_RGB565X,
173 .bpp = 16,
174 .desc = "RGB565 byteswapped",
175 .pkf = 3,
176 .rgb = 1,
177 },
178 };
179
180 static void sh_vou_schedule_next(struct sh_vou_device *vou_dev,
181 struct videobuf_buffer *vb)
182 {
183 dma_addr_t addr1, addr2;
184
185 addr1 = videobuf_to_dma_contig(vb);
186 switch (vou_dev->pix.pixelformat) {
187 case V4L2_PIX_FMT_NV12:
188 case V4L2_PIX_FMT_NV16:
189 addr2 = addr1 + vou_dev->pix.width * vou_dev->pix.height;
190 break;
191 default:
192 addr2 = 0;
193 }
194
195 sh_vou_reg_m_write(vou_dev, VOUAD1R, addr1);
196 sh_vou_reg_m_write(vou_dev, VOUAD2R, addr2);
197 }
198
199 static void sh_vou_stream_start(struct sh_vou_device *vou_dev,
200 struct videobuf_buffer *vb)
201 {
202 unsigned int row_coeff;
203 #ifdef __LITTLE_ENDIAN
204 u32 dataswap = 7;
205 #else
206 u32 dataswap = 0;
207 #endif
208
209 switch (vou_dev->pix.pixelformat) {
210 default:
211 case V4L2_PIX_FMT_NV12:
212 case V4L2_PIX_FMT_NV16:
213 row_coeff = 1;
214 break;
215 case V4L2_PIX_FMT_RGB565:
216 dataswap ^= 1;
217 case V4L2_PIX_FMT_RGB565X:
218 row_coeff = 2;
219 break;
220 case V4L2_PIX_FMT_RGB24:
221 row_coeff = 3;
222 break;
223 }
224
225 sh_vou_reg_a_write(vou_dev, VOUSWR, dataswap);
226 sh_vou_reg_ab_write(vou_dev, VOUAIR, vou_dev->pix.width * row_coeff);
227 sh_vou_schedule_next(vou_dev, vb);
228 }
229
230 static void free_buffer(struct videobuf_queue *vq, struct videobuf_buffer *vb)
231 {
232 BUG_ON(in_interrupt());
233
234 /* Wait until this buffer is no longer in STATE_QUEUED or STATE_ACTIVE */
235 videobuf_waiton(vq, vb, 0, 0);
236 videobuf_dma_contig_free(vq, vb);
237 vb->state = VIDEOBUF_NEEDS_INIT;
238 }
239
240 /* Locking: caller holds fop_lock mutex */
241 static int sh_vou_buf_setup(struct videobuf_queue *vq, unsigned int *count,
242 unsigned int *size)
243 {
244 struct video_device *vdev = vq->priv_data;
245 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
246
247 *size = vou_fmt[vou_dev->pix_idx].bpp * vou_dev->pix.width *
248 vou_dev->pix.height / 8;
249
250 if (*count < 2)
251 *count = 2;
252
253 /* Taking into account maximum frame size, *count will stay >= 2 */
254 if (PAGE_ALIGN(*size) * *count > 4 * 1024 * 1024)
255 *count = 4 * 1024 * 1024 / PAGE_ALIGN(*size);
256
257 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): count=%d, size=%d\n", __func__,
258 *count, *size);
259
260 return 0;
261 }
262
263 /* Locking: caller holds fop_lock mutex */
264 static int sh_vou_buf_prepare(struct videobuf_queue *vq,
265 struct videobuf_buffer *vb,
266 enum v4l2_field field)
267 {
268 struct video_device *vdev = vq->priv_data;
269 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
270 struct v4l2_pix_format *pix = &vou_dev->pix;
271 int bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
272 int ret;
273
274 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
275
276 if (vb->width != pix->width ||
277 vb->height != pix->height ||
278 vb->field != pix->field) {
279 vb->width = pix->width;
280 vb->height = pix->height;
281 vb->field = field;
282 if (vb->state != VIDEOBUF_NEEDS_INIT)
283 free_buffer(vq, vb);
284 }
285
286 vb->size = vb->height * bytes_per_line;
287 if (vb->baddr && vb->bsize < vb->size) {
288 /* User buffer too small */
289 dev_warn(vq->dev, "User buffer too small: [%zu] @ %lx\n",
290 vb->bsize, vb->baddr);
291 return -EINVAL;
292 }
293
294 if (vb->state == VIDEOBUF_NEEDS_INIT) {
295 ret = videobuf_iolock(vq, vb, NULL);
296 if (ret < 0) {
297 dev_warn(vq->dev, "IOLOCK buf-type %d: %d\n",
298 vb->memory, ret);
299 return ret;
300 }
301 vb->state = VIDEOBUF_PREPARED;
302 }
303
304 dev_dbg(vou_dev->v4l2_dev.dev,
305 "%s(): fmt #%d, %u bytes per line, phys %pad, type %d, state %d\n",
306 __func__, vou_dev->pix_idx, bytes_per_line,
307 ({ dma_addr_t addr = videobuf_to_dma_contig(vb); &addr; }),
308 vb->memory, vb->state);
309
310 return 0;
311 }
312
313 /* Locking: caller holds fop_lock mutex and vq->irqlock spinlock */
314 static void sh_vou_buf_queue(struct videobuf_queue *vq,
315 struct videobuf_buffer *vb)
316 {
317 struct video_device *vdev = vq->priv_data;
318 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
319
320 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
321
322 vb->state = VIDEOBUF_QUEUED;
323 list_add_tail(&vb->queue, &vou_dev->queue);
324
325 if (vou_dev->status == SH_VOU_RUNNING) {
326 return;
327 } else if (!vou_dev->active) {
328 vou_dev->active = vb;
329 /* Start from side A: we use mirror addresses, so, set B */
330 sh_vou_reg_a_write(vou_dev, VOURPR, 1);
331 dev_dbg(vou_dev->v4l2_dev.dev, "%s: first buffer status 0x%x\n",
332 __func__, sh_vou_reg_a_read(vou_dev, VOUSTR));
333 sh_vou_schedule_next(vou_dev, vb);
334 /* Only activate VOU after the second buffer */
335 } else if (vou_dev->active->queue.next == &vb->queue) {
336 /* Second buffer - initialise register side B */
337 sh_vou_reg_a_write(vou_dev, VOURPR, 0);
338 sh_vou_stream_start(vou_dev, vb);
339
340 /* Register side switching with frame VSYNC */
341 sh_vou_reg_a_write(vou_dev, VOURCR, 5);
342 dev_dbg(vou_dev->v4l2_dev.dev, "%s: second buffer status 0x%x\n",
343 __func__, sh_vou_reg_a_read(vou_dev, VOUSTR));
344
345 /* Enable End-of-Frame (VSYNC) interrupts */
346 sh_vou_reg_a_write(vou_dev, VOUIR, 0x10004);
347 /* Two buffers on the queue - activate the hardware */
348
349 vou_dev->status = SH_VOU_RUNNING;
350 sh_vou_reg_a_write(vou_dev, VOUER, 0x107);
351 }
352 }
353
354 static void sh_vou_buf_release(struct videobuf_queue *vq,
355 struct videobuf_buffer *vb)
356 {
357 struct video_device *vdev = vq->priv_data;
358 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
359 unsigned long flags;
360
361 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
362
363 spin_lock_irqsave(&vou_dev->lock, flags);
364
365 if (vou_dev->active == vb) {
366 /* disable output */
367 sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
368 /* ...but the current frame will complete */
369 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
370 vou_dev->active = NULL;
371 }
372
373 if ((vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED)) {
374 vb->state = VIDEOBUF_ERROR;
375 list_del(&vb->queue);
376 }
377
378 spin_unlock_irqrestore(&vou_dev->lock, flags);
379
380 free_buffer(vq, vb);
381 }
382
383 static struct videobuf_queue_ops sh_vou_video_qops = {
384 .buf_setup = sh_vou_buf_setup,
385 .buf_prepare = sh_vou_buf_prepare,
386 .buf_queue = sh_vou_buf_queue,
387 .buf_release = sh_vou_buf_release,
388 };
389
390 /* Video IOCTLs */
391 static int sh_vou_querycap(struct file *file, void *priv,
392 struct v4l2_capability *cap)
393 {
394 struct sh_vou_device *vou_dev = video_drvdata(file);
395
396 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
397
398 strlcpy(cap->card, "SuperH VOU", sizeof(cap->card));
399 cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
400 return 0;
401 }
402
403 /* Enumerate formats, that the device can accept from the user */
404 static int sh_vou_enum_fmt_vid_out(struct file *file, void *priv,
405 struct v4l2_fmtdesc *fmt)
406 {
407 struct sh_vou_device *vou_dev = video_drvdata(file);
408
409 if (fmt->index >= ARRAY_SIZE(vou_fmt))
410 return -EINVAL;
411
412 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
413
414 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
415 strlcpy(fmt->description, vou_fmt[fmt->index].desc,
416 sizeof(fmt->description));
417 fmt->pixelformat = vou_fmt[fmt->index].pfmt;
418
419 return 0;
420 }
421
422 static int sh_vou_g_fmt_vid_out(struct file *file, void *priv,
423 struct v4l2_format *fmt)
424 {
425 struct sh_vou_device *vou_dev = video_drvdata(file);
426
427 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
428
429 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
430 fmt->fmt.pix = vou_dev->pix;
431
432 return 0;
433 }
434
435 static const unsigned char vou_scale_h_num[] = {1, 9, 2, 9, 4};
436 static const unsigned char vou_scale_h_den[] = {1, 8, 1, 4, 1};
437 static const unsigned char vou_scale_h_fld[] = {0, 2, 1, 3};
438 static const unsigned char vou_scale_v_num[] = {1, 2, 4};
439 static const unsigned char vou_scale_v_den[] = {1, 1, 1};
440 static const unsigned char vou_scale_v_fld[] = {0, 1};
441
442 static void sh_vou_configure_geometry(struct sh_vou_device *vou_dev,
443 int pix_idx, int w_idx, int h_idx)
444 {
445 struct sh_vou_fmt *fmt = vou_fmt + pix_idx;
446 unsigned int black_left, black_top, width_max,
447 frame_in_height, frame_out_height, frame_out_top;
448 struct v4l2_rect *rect = &vou_dev->rect;
449 struct v4l2_pix_format *pix = &vou_dev->pix;
450 u32 vouvcr = 0, dsr_h, dsr_v;
451
452 if (vou_dev->std & V4L2_STD_525_60) {
453 width_max = 858;
454 /* height_max = 262; */
455 } else {
456 width_max = 864;
457 /* height_max = 312; */
458 }
459
460 frame_in_height = pix->height / 2;
461 frame_out_height = rect->height / 2;
462 frame_out_top = rect->top / 2;
463
464 /*
465 * Cropping scheme: max useful image is 720x480, and the total video
466 * area is 858x525 (NTSC) or 864x625 (PAL). AK8813 / 8814 starts
467 * sampling data beginning with fixed 276th (NTSC) / 288th (PAL) clock,
468 * of which the first 33 / 25 clocks HSYNC must be held active. This
469 * has to be configured in CR[HW]. 1 pixel equals 2 clock periods.
470 * This gives CR[HW] = 16 / 12, VPR[HVP] = 138 / 144, which gives
471 * exactly 858 - 138 = 864 - 144 = 720! We call the out-of-display area,
472 * beyond DSR, specified on the left and top by the VPR register "black
473 * pixels" and out-of-image area (DPR) "background pixels." We fix VPR
474 * at 138 / 144 : 20, because that's the HSYNC timing, that our first
475 * client requires, and that's exactly what leaves us 720 pixels for the
476 * image; we leave VPR[VVP] at default 20 for now, because the client
477 * doesn't seem to have any special requirements for it. Otherwise we
478 * could also set it to max - 240 = 22 / 72. Thus VPR depends only on
479 * the selected standard, and DPR and DSR are selected according to
480 * cropping. Q: how does the client detect the first valid line? Does
481 * HSYNC stay inactive during invalid (black) lines?
482 */
483 black_left = width_max - VOU_MAX_IMAGE_WIDTH;
484 black_top = 20;
485
486 dsr_h = rect->width + rect->left;
487 dsr_v = frame_out_height + frame_out_top;
488
489 dev_dbg(vou_dev->v4l2_dev.dev,
490 "image %ux%u, black %u:%u, offset %u:%u, display %ux%u\n",
491 pix->width, frame_in_height, black_left, black_top,
492 rect->left, frame_out_top, dsr_h, dsr_v);
493
494 /* VOUISR height - half of a frame height in frame mode */
495 sh_vou_reg_ab_write(vou_dev, VOUISR, (pix->width << 16) | frame_in_height);
496 sh_vou_reg_ab_write(vou_dev, VOUVPR, (black_left << 16) | black_top);
497 sh_vou_reg_ab_write(vou_dev, VOUDPR, (rect->left << 16) | frame_out_top);
498 sh_vou_reg_ab_write(vou_dev, VOUDSR, (dsr_h << 16) | dsr_v);
499
500 /*
501 * if necessary, we could set VOUHIR to
502 * max(black_left + dsr_h, width_max) here
503 */
504
505 if (w_idx)
506 vouvcr |= (1 << 15) | (vou_scale_h_fld[w_idx - 1] << 4);
507 if (h_idx)
508 vouvcr |= (1 << 14) | vou_scale_v_fld[h_idx - 1];
509
510 dev_dbg(vou_dev->v4l2_dev.dev, "%s: scaling 0x%x\n", fmt->desc, vouvcr);
511
512 /* To produce a colour bar for testing set bit 23 of VOUVCR */
513 sh_vou_reg_ab_write(vou_dev, VOUVCR, vouvcr);
514 sh_vou_reg_ab_write(vou_dev, VOUDFR,
515 fmt->pkf | (fmt->yf << 8) | (fmt->rgb << 16));
516 }
517
518 struct sh_vou_geometry {
519 struct v4l2_rect output;
520 unsigned int in_width;
521 unsigned int in_height;
522 int scale_idx_h;
523 int scale_idx_v;
524 };
525
526 /*
527 * Find input geometry, that we can use to produce output, closest to the
528 * requested rectangle, using VOU scaling
529 */
530 static void vou_adjust_input(struct sh_vou_geometry *geo, v4l2_std_id std)
531 {
532 /* The compiler cannot know, that best and idx will indeed be set */
533 unsigned int best_err = UINT_MAX, best = 0, img_height_max;
534 int i, idx = 0;
535
536 if (std & V4L2_STD_525_60)
537 img_height_max = 480;
538 else
539 img_height_max = 576;
540
541 /* Image width must be a multiple of 4 */
542 v4l_bound_align_image(&geo->in_width, 0, VOU_MAX_IMAGE_WIDTH, 2,
543 &geo->in_height, 0, img_height_max, 1, 0);
544
545 /* Select scales to come as close as possible to the output image */
546 for (i = ARRAY_SIZE(vou_scale_h_num) - 1; i >= 0; i--) {
547 unsigned int err;
548 unsigned int found = geo->output.width * vou_scale_h_den[i] /
549 vou_scale_h_num[i];
550
551 if (found > VOU_MAX_IMAGE_WIDTH)
552 /* scales increase */
553 break;
554
555 err = abs(found - geo->in_width);
556 if (err < best_err) {
557 best_err = err;
558 idx = i;
559 best = found;
560 }
561 if (!err)
562 break;
563 }
564
565 geo->in_width = best;
566 geo->scale_idx_h = idx;
567
568 best_err = UINT_MAX;
569
570 /* This loop can be replaced with one division */
571 for (i = ARRAY_SIZE(vou_scale_v_num) - 1; i >= 0; i--) {
572 unsigned int err;
573 unsigned int found = geo->output.height * vou_scale_v_den[i] /
574 vou_scale_v_num[i];
575
576 if (found > img_height_max)
577 /* scales increase */
578 break;
579
580 err = abs(found - geo->in_height);
581 if (err < best_err) {
582 best_err = err;
583 idx = i;
584 best = found;
585 }
586 if (!err)
587 break;
588 }
589
590 geo->in_height = best;
591 geo->scale_idx_v = idx;
592 }
593
594 /*
595 * Find output geometry, that we can produce, using VOU scaling, closest to
596 * the requested rectangle
597 */
598 static void vou_adjust_output(struct sh_vou_geometry *geo, v4l2_std_id std)
599 {
600 unsigned int best_err = UINT_MAX, best = geo->in_width,
601 width_max, height_max, img_height_max;
602 int i, idx = 0;
603
604 if (std & V4L2_STD_525_60) {
605 width_max = 858;
606 height_max = 262 * 2;
607 img_height_max = 480;
608 } else {
609 width_max = 864;
610 height_max = 312 * 2;
611 img_height_max = 576;
612 }
613
614 /* Select scales to come as close as possible to the output image */
615 for (i = 0; i < ARRAY_SIZE(vou_scale_h_num); i++) {
616 unsigned int err;
617 unsigned int found = geo->in_width * vou_scale_h_num[i] /
618 vou_scale_h_den[i];
619
620 if (found > VOU_MAX_IMAGE_WIDTH)
621 /* scales increase */
622 break;
623
624 err = abs(found - geo->output.width);
625 if (err < best_err) {
626 best_err = err;
627 idx = i;
628 best = found;
629 }
630 if (!err)
631 break;
632 }
633
634 geo->output.width = best;
635 geo->scale_idx_h = idx;
636 if (geo->output.left + best > width_max)
637 geo->output.left = width_max - best;
638
639 pr_debug("%s(): W %u * %u/%u = %u\n", __func__, geo->in_width,
640 vou_scale_h_num[idx], vou_scale_h_den[idx], best);
641
642 best_err = UINT_MAX;
643
644 /* This loop can be replaced with one division */
645 for (i = 0; i < ARRAY_SIZE(vou_scale_v_num); i++) {
646 unsigned int err;
647 unsigned int found = geo->in_height * vou_scale_v_num[i] /
648 vou_scale_v_den[i];
649
650 if (found > img_height_max)
651 /* scales increase */
652 break;
653
654 err = abs(found - geo->output.height);
655 if (err < best_err) {
656 best_err = err;
657 idx = i;
658 best = found;
659 }
660 if (!err)
661 break;
662 }
663
664 geo->output.height = best;
665 geo->scale_idx_v = idx;
666 if (geo->output.top + best > height_max)
667 geo->output.top = height_max - best;
668
669 pr_debug("%s(): H %u * %u/%u = %u\n", __func__, geo->in_height,
670 vou_scale_v_num[idx], vou_scale_v_den[idx], best);
671 }
672
673 static int sh_vou_s_fmt_vid_out(struct file *file, void *priv,
674 struct v4l2_format *fmt)
675 {
676 struct sh_vou_device *vou_dev = video_drvdata(file);
677 struct v4l2_pix_format *pix = &fmt->fmt.pix;
678 unsigned int img_height_max;
679 int pix_idx;
680 struct sh_vou_geometry geo;
681 struct v4l2_mbus_framefmt mbfmt = {
682 /* Revisit: is this the correct code? */
683 .code = V4L2_MBUS_FMT_YUYV8_2X8,
684 .field = V4L2_FIELD_INTERLACED,
685 .colorspace = V4L2_COLORSPACE_SMPTE170M,
686 };
687 int ret;
688
689 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
690 vou_dev->rect.width, vou_dev->rect.height,
691 pix->width, pix->height);
692
693 if (pix->field == V4L2_FIELD_ANY)
694 pix->field = V4L2_FIELD_NONE;
695
696 if (fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
697 pix->field != V4L2_FIELD_NONE)
698 return -EINVAL;
699
700 for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
701 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
702 break;
703
704 if (pix_idx == ARRAY_SIZE(vou_fmt))
705 return -EINVAL;
706
707 if (vou_dev->std & V4L2_STD_525_60)
708 img_height_max = 480;
709 else
710 img_height_max = 576;
711
712 /* Image width must be a multiple of 4 */
713 v4l_bound_align_image(&pix->width, 0, VOU_MAX_IMAGE_WIDTH, 2,
714 &pix->height, 0, img_height_max, 1, 0);
715
716 geo.in_width = pix->width;
717 geo.in_height = pix->height;
718 geo.output = vou_dev->rect;
719
720 vou_adjust_output(&geo, vou_dev->std);
721
722 mbfmt.width = geo.output.width;
723 mbfmt.height = geo.output.height;
724 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
725 s_mbus_fmt, &mbfmt);
726 /* Must be implemented, so, don't check for -ENOIOCTLCMD */
727 if (ret < 0)
728 return ret;
729
730 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
731 geo.output.width, geo.output.height, mbfmt.width, mbfmt.height);
732
733 /* Sanity checks */
734 if ((unsigned)mbfmt.width > VOU_MAX_IMAGE_WIDTH ||
735 (unsigned)mbfmt.height > img_height_max ||
736 mbfmt.code != V4L2_MBUS_FMT_YUYV8_2X8)
737 return -EIO;
738
739 if (mbfmt.width != geo.output.width ||
740 mbfmt.height != geo.output.height) {
741 geo.output.width = mbfmt.width;
742 geo.output.height = mbfmt.height;
743
744 vou_adjust_input(&geo, vou_dev->std);
745 }
746
747 /* We tried to preserve output rectangle, but it could have changed */
748 vou_dev->rect = geo.output;
749 pix->width = geo.in_width;
750 pix->height = geo.in_height;
751
752 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u\n", __func__,
753 pix->width, pix->height);
754
755 vou_dev->pix_idx = pix_idx;
756
757 vou_dev->pix = *pix;
758
759 sh_vou_configure_geometry(vou_dev, pix_idx,
760 geo.scale_idx_h, geo.scale_idx_v);
761
762 return 0;
763 }
764
765 static int sh_vou_try_fmt_vid_out(struct file *file, void *priv,
766 struct v4l2_format *fmt)
767 {
768 struct sh_vou_device *vou_dev = video_drvdata(file);
769 struct v4l2_pix_format *pix = &fmt->fmt.pix;
770 int i;
771
772 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
773
774 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
775 pix->field = V4L2_FIELD_NONE;
776
777 v4l_bound_align_image(&pix->width, 0, VOU_MAX_IMAGE_WIDTH, 1,
778 &pix->height, 0, VOU_MAX_IMAGE_HEIGHT, 1, 0);
779
780 for (i = 0; i < ARRAY_SIZE(vou_fmt); i++)
781 if (vou_fmt[i].pfmt == pix->pixelformat)
782 return 0;
783
784 pix->pixelformat = vou_fmt[0].pfmt;
785
786 return 0;
787 }
788
789 static int sh_vou_reqbufs(struct file *file, void *priv,
790 struct v4l2_requestbuffers *req)
791 {
792 struct sh_vou_device *vou_dev = video_drvdata(file);
793 struct sh_vou_file *vou_file = priv;
794
795 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
796
797 if (req->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
798 return -EINVAL;
799
800 return videobuf_reqbufs(&vou_file->vbq, req);
801 }
802
803 static int sh_vou_querybuf(struct file *file, void *priv,
804 struct v4l2_buffer *b)
805 {
806 struct sh_vou_device *vou_dev = video_drvdata(file);
807 struct sh_vou_file *vou_file = priv;
808
809 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
810
811 return videobuf_querybuf(&vou_file->vbq, b);
812 }
813
814 static int sh_vou_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
815 {
816 struct sh_vou_device *vou_dev = video_drvdata(file);
817 struct sh_vou_file *vou_file = priv;
818
819 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
820
821 return videobuf_qbuf(&vou_file->vbq, b);
822 }
823
824 static int sh_vou_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
825 {
826 struct sh_vou_device *vou_dev = video_drvdata(file);
827 struct sh_vou_file *vou_file = priv;
828
829 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
830
831 return videobuf_dqbuf(&vou_file->vbq, b, file->f_flags & O_NONBLOCK);
832 }
833
834 static int sh_vou_streamon(struct file *file, void *priv,
835 enum v4l2_buf_type buftype)
836 {
837 struct sh_vou_device *vou_dev = video_drvdata(file);
838 struct sh_vou_file *vou_file = priv;
839 int ret;
840
841 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
842
843 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
844 video, s_stream, 1);
845 if (ret < 0 && ret != -ENOIOCTLCMD)
846 return ret;
847
848 /* This calls our .buf_queue() (== sh_vou_buf_queue) */
849 return videobuf_streamon(&vou_file->vbq);
850 }
851
852 static int sh_vou_streamoff(struct file *file, void *priv,
853 enum v4l2_buf_type buftype)
854 {
855 struct sh_vou_device *vou_dev = video_drvdata(file);
856 struct sh_vou_file *vou_file = priv;
857
858 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
859
860 /*
861 * This calls buf_release from host driver's videobuf_queue_ops for all
862 * remaining buffers. When the last buffer is freed, stop streaming
863 */
864 videobuf_streamoff(&vou_file->vbq);
865 v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video, s_stream, 0);
866
867 return 0;
868 }
869
870 static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)
871 {
872 switch (bus_fmt) {
873 default:
874 pr_warning("%s(): Invalid bus-format code %d, using default 8-bit\n",
875 __func__, bus_fmt);
876 case SH_VOU_BUS_8BIT:
877 return 1;
878 case SH_VOU_BUS_16BIT:
879 return 0;
880 case SH_VOU_BUS_BT656:
881 return 3;
882 }
883 }
884
885 static int sh_vou_s_std(struct file *file, void *priv, v4l2_std_id std_id)
886 {
887 struct sh_vou_device *vou_dev = video_drvdata(file);
888 int ret;
889
890 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): 0x%llx\n", __func__, std_id);
891
892 if (std_id & ~vou_dev->vdev->tvnorms)
893 return -EINVAL;
894
895 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
896 s_std_output, std_id);
897 /* Shall we continue, if the subdev doesn't support .s_std_output()? */
898 if (ret < 0 && ret != -ENOIOCTLCMD)
899 return ret;
900
901 if (std_id & V4L2_STD_525_60)
902 sh_vou_reg_ab_set(vou_dev, VOUCR,
903 sh_vou_ntsc_mode(vou_dev->pdata->bus_fmt) << 29, 7 << 29);
904 else
905 sh_vou_reg_ab_set(vou_dev, VOUCR, 5 << 29, 7 << 29);
906
907 vou_dev->std = std_id;
908
909 return 0;
910 }
911
912 static int sh_vou_g_std(struct file *file, void *priv, v4l2_std_id *std)
913 {
914 struct sh_vou_device *vou_dev = video_drvdata(file);
915
916 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
917
918 *std = vou_dev->std;
919
920 return 0;
921 }
922
923 static int sh_vou_g_crop(struct file *file, void *fh, struct v4l2_crop *a)
924 {
925 struct sh_vou_device *vou_dev = video_drvdata(file);
926
927 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
928
929 a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
930 a->c = vou_dev->rect;
931
932 return 0;
933 }
934
935 /* Assume a dull encoder, do all the work ourselves. */
936 static int sh_vou_s_crop(struct file *file, void *fh, const struct v4l2_crop *a)
937 {
938 struct v4l2_crop a_writable = *a;
939 struct sh_vou_device *vou_dev = video_drvdata(file);
940 struct v4l2_rect *rect = &a_writable.c;
941 struct v4l2_crop sd_crop = {.type = V4L2_BUF_TYPE_VIDEO_OUTPUT};
942 struct v4l2_pix_format *pix = &vou_dev->pix;
943 struct sh_vou_geometry geo;
944 struct v4l2_mbus_framefmt mbfmt = {
945 /* Revisit: is this the correct code? */
946 .code = V4L2_MBUS_FMT_YUYV8_2X8,
947 .field = V4L2_FIELD_INTERLACED,
948 .colorspace = V4L2_COLORSPACE_SMPTE170M,
949 };
950 unsigned int img_height_max;
951 int ret;
952
953 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u@%u:%u\n", __func__,
954 rect->width, rect->height, rect->left, rect->top);
955
956 if (a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
957 return -EINVAL;
958
959 if (vou_dev->std & V4L2_STD_525_60)
960 img_height_max = 480;
961 else
962 img_height_max = 576;
963
964 v4l_bound_align_image(&rect->width, 0, VOU_MAX_IMAGE_WIDTH, 1,
965 &rect->height, 0, img_height_max, 1, 0);
966
967 if (rect->width + rect->left > VOU_MAX_IMAGE_WIDTH)
968 rect->left = VOU_MAX_IMAGE_WIDTH - rect->width;
969
970 if (rect->height + rect->top > img_height_max)
971 rect->top = img_height_max - rect->height;
972
973 geo.output = *rect;
974 geo.in_width = pix->width;
975 geo.in_height = pix->height;
976
977 /* Configure the encoder one-to-one, position at 0, ignore errors */
978 sd_crop.c.width = geo.output.width;
979 sd_crop.c.height = geo.output.height;
980 /*
981 * We first issue a S_CROP, so that the subsequent S_FMT delivers the
982 * final encoder configuration.
983 */
984 v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
985 s_crop, &sd_crop);
986 mbfmt.width = geo.output.width;
987 mbfmt.height = geo.output.height;
988 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
989 s_mbus_fmt, &mbfmt);
990 /* Must be implemented, so, don't check for -ENOIOCTLCMD */
991 if (ret < 0)
992 return ret;
993
994 /* Sanity checks */
995 if ((unsigned)mbfmt.width > VOU_MAX_IMAGE_WIDTH ||
996 (unsigned)mbfmt.height > img_height_max ||
997 mbfmt.code != V4L2_MBUS_FMT_YUYV8_2X8)
998 return -EIO;
999
1000 geo.output.width = mbfmt.width;
1001 geo.output.height = mbfmt.height;
1002
1003 /*
1004 * No down-scaling. According to the API, current call has precedence:
1005 * http://v4l2spec.bytesex.org/spec/x1904.htm#AEN1954 paragraph two.
1006 */
1007 vou_adjust_input(&geo, vou_dev->std);
1008
1009 /* We tried to preserve output rectangle, but it could have changed */
1010 vou_dev->rect = geo.output;
1011 pix->width = geo.in_width;
1012 pix->height = geo.in_height;
1013
1014 sh_vou_configure_geometry(vou_dev, vou_dev->pix_idx,
1015 geo.scale_idx_h, geo.scale_idx_v);
1016
1017 return 0;
1018 }
1019
1020 /*
1021 * Total field: NTSC 858 x 2 * 262/263, PAL 864 x 2 * 312/313, default rectangle
1022 * is the initial register values, height takes the interlaced format into
1023 * account. The actual image can only go up to 720 x 2 * 240, So, VOUVPR can
1024 * actually only meaningfully contain values <= 720 and <= 240 respectively, and
1025 * not <= 864 and <= 312.
1026 */
1027 static int sh_vou_cropcap(struct file *file, void *priv,
1028 struct v4l2_cropcap *a)
1029 {
1030 struct sh_vou_device *vou_dev = video_drvdata(file);
1031
1032 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
1033
1034 a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1035 a->bounds.left = 0;
1036 a->bounds.top = 0;
1037 a->bounds.width = VOU_MAX_IMAGE_WIDTH;
1038 a->bounds.height = VOU_MAX_IMAGE_HEIGHT;
1039 /* Default = max, set VOUDPR = 0, which is not hardware default */
1040 a->defrect.left = 0;
1041 a->defrect.top = 0;
1042 a->defrect.width = VOU_MAX_IMAGE_WIDTH;
1043 a->defrect.height = VOU_MAX_IMAGE_HEIGHT;
1044 a->pixelaspect.numerator = 1;
1045 a->pixelaspect.denominator = 1;
1046
1047 return 0;
1048 }
1049
1050 static irqreturn_t sh_vou_isr(int irq, void *dev_id)
1051 {
1052 struct sh_vou_device *vou_dev = dev_id;
1053 static unsigned long j;
1054 struct videobuf_buffer *vb;
1055 static int cnt;
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 v4l2_get_timestamp(&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 sh_vou_device *vou_dev = video_drvdata(file);
1162 struct sh_vou_file *vou_file = kzalloc(sizeof(struct sh_vou_file),
1163 GFP_KERNEL);
1164
1165 if (!vou_file)
1166 return -ENOMEM;
1167
1168 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
1169
1170 file->private_data = vou_file;
1171
1172 if (mutex_lock_interruptible(&vou_dev->fop_lock))
1173 return -ERESTARTSYS;
1174 if (atomic_inc_return(&vou_dev->use_count) == 1) {
1175 int ret;
1176 /* First open */
1177 vou_dev->status = SH_VOU_INITIALISING;
1178 pm_runtime_get_sync(vou_dev->v4l2_dev.dev);
1179 ret = sh_vou_hw_init(vou_dev);
1180 if (ret < 0) {
1181 atomic_dec(&vou_dev->use_count);
1182 pm_runtime_put(vou_dev->v4l2_dev.dev);
1183 vou_dev->status = SH_VOU_IDLE;
1184 mutex_unlock(&vou_dev->fop_lock);
1185 return ret;
1186 }
1187 }
1188
1189 videobuf_queue_dma_contig_init(&vou_file->vbq, &sh_vou_video_qops,
1190 vou_dev->v4l2_dev.dev, &vou_dev->lock,
1191 V4L2_BUF_TYPE_VIDEO_OUTPUT,
1192 V4L2_FIELD_NONE,
1193 sizeof(struct videobuf_buffer),
1194 vou_dev->vdev, &vou_dev->fop_lock);
1195 mutex_unlock(&vou_dev->fop_lock);
1196
1197 return 0;
1198 }
1199
1200 static int sh_vou_release(struct file *file)
1201 {
1202 struct sh_vou_device *vou_dev = video_drvdata(file);
1203 struct sh_vou_file *vou_file = file->private_data;
1204
1205 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
1206
1207 if (!atomic_dec_return(&vou_dev->use_count)) {
1208 mutex_lock(&vou_dev->fop_lock);
1209 /* Last close */
1210 vou_dev->status = SH_VOU_IDLE;
1211 sh_vou_reg_a_set(vou_dev, VOUER, 0, 0x101);
1212 pm_runtime_put(vou_dev->v4l2_dev.dev);
1213 mutex_unlock(&vou_dev->fop_lock);
1214 }
1215
1216 file->private_data = NULL;
1217 kfree(vou_file);
1218
1219 return 0;
1220 }
1221
1222 static int sh_vou_mmap(struct file *file, struct vm_area_struct *vma)
1223 {
1224 struct sh_vou_device *vou_dev = video_drvdata(file);
1225 struct sh_vou_file *vou_file = file->private_data;
1226 int ret;
1227
1228 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
1229
1230 if (mutex_lock_interruptible(&vou_dev->fop_lock))
1231 return -ERESTARTSYS;
1232 ret = videobuf_mmap_mapper(&vou_file->vbq, vma);
1233 mutex_unlock(&vou_dev->fop_lock);
1234 return ret;
1235 }
1236
1237 static unsigned int sh_vou_poll(struct file *file, poll_table *wait)
1238 {
1239 struct sh_vou_device *vou_dev = video_drvdata(file);
1240 struct sh_vou_file *vou_file = file->private_data;
1241 unsigned int res;
1242
1243 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
1244
1245 mutex_lock(&vou_dev->fop_lock);
1246 res = videobuf_poll_stream(file, &vou_file->vbq, wait);
1247 mutex_unlock(&vou_dev->fop_lock);
1248 return res;
1249 }
1250
1251 /* sh_vou display ioctl operations */
1252 static const struct v4l2_ioctl_ops sh_vou_ioctl_ops = {
1253 .vidioc_querycap = sh_vou_querycap,
1254 .vidioc_enum_fmt_vid_out = sh_vou_enum_fmt_vid_out,
1255 .vidioc_g_fmt_vid_out = sh_vou_g_fmt_vid_out,
1256 .vidioc_s_fmt_vid_out = sh_vou_s_fmt_vid_out,
1257 .vidioc_try_fmt_vid_out = sh_vou_try_fmt_vid_out,
1258 .vidioc_reqbufs = sh_vou_reqbufs,
1259 .vidioc_querybuf = sh_vou_querybuf,
1260 .vidioc_qbuf = sh_vou_qbuf,
1261 .vidioc_dqbuf = sh_vou_dqbuf,
1262 .vidioc_streamon = sh_vou_streamon,
1263 .vidioc_streamoff = sh_vou_streamoff,
1264 .vidioc_s_std = sh_vou_s_std,
1265 .vidioc_g_std = sh_vou_g_std,
1266 .vidioc_cropcap = sh_vou_cropcap,
1267 .vidioc_g_crop = sh_vou_g_crop,
1268 .vidioc_s_crop = sh_vou_s_crop,
1269 };
1270
1271 static const struct v4l2_file_operations sh_vou_fops = {
1272 .owner = THIS_MODULE,
1273 .open = sh_vou_open,
1274 .release = sh_vou_release,
1275 .unlocked_ioctl = video_ioctl2,
1276 .mmap = sh_vou_mmap,
1277 .poll = sh_vou_poll,
1278 };
1279
1280 static const struct video_device sh_vou_video_template = {
1281 .name = "sh_vou",
1282 .fops = &sh_vou_fops,
1283 .ioctl_ops = &sh_vou_ioctl_ops,
1284 .tvnorms = V4L2_STD_525_60, /* PAL only supported in 8-bit non-bt656 mode */
1285 .vfl_dir = VFL_DIR_TX,
1286 };
1287
1288 static int sh_vou_probe(struct platform_device *pdev)
1289 {
1290 struct sh_vou_pdata *vou_pdata = pdev->dev.platform_data;
1291 struct v4l2_rect *rect;
1292 struct v4l2_pix_format *pix;
1293 struct i2c_adapter *i2c_adap;
1294 struct video_device *vdev;
1295 struct sh_vou_device *vou_dev;
1296 struct resource *reg_res, *region;
1297 struct v4l2_subdev *subdev;
1298 int irq, ret;
1299
1300 reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1301 irq = platform_get_irq(pdev, 0);
1302
1303 if (!vou_pdata || !reg_res || irq <= 0) {
1304 dev_err(&pdev->dev, "Insufficient VOU platform information.\n");
1305 return -ENODEV;
1306 }
1307
1308 vou_dev = kzalloc(sizeof(*vou_dev), GFP_KERNEL);
1309 if (!vou_dev)
1310 return -ENOMEM;
1311
1312 INIT_LIST_HEAD(&vou_dev->queue);
1313 spin_lock_init(&vou_dev->lock);
1314 mutex_init(&vou_dev->fop_lock);
1315 atomic_set(&vou_dev->use_count, 0);
1316 vou_dev->pdata = vou_pdata;
1317 vou_dev->status = SH_VOU_IDLE;
1318
1319 rect = &vou_dev->rect;
1320 pix = &vou_dev->pix;
1321
1322 /* Fill in defaults */
1323 vou_dev->std = V4L2_STD_NTSC_M;
1324 rect->left = 0;
1325 rect->top = 0;
1326 rect->width = VOU_MAX_IMAGE_WIDTH;
1327 rect->height = 480;
1328 pix->width = VOU_MAX_IMAGE_WIDTH;
1329 pix->height = 480;
1330 pix->pixelformat = V4L2_PIX_FMT_YVYU;
1331 pix->field = V4L2_FIELD_NONE;
1332 pix->bytesperline = VOU_MAX_IMAGE_WIDTH * 2;
1333 pix->sizeimage = VOU_MAX_IMAGE_WIDTH * 2 * 480;
1334 pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
1335
1336 region = request_mem_region(reg_res->start, resource_size(reg_res),
1337 pdev->name);
1338 if (!region) {
1339 dev_err(&pdev->dev, "VOU region already claimed\n");
1340 ret = -EBUSY;
1341 goto ereqmemreg;
1342 }
1343
1344 vou_dev->base = ioremap(reg_res->start, resource_size(reg_res));
1345 if (!vou_dev->base) {
1346 ret = -ENOMEM;
1347 goto emap;
1348 }
1349
1350 ret = request_irq(irq, sh_vou_isr, 0, "vou", vou_dev);
1351 if (ret < 0)
1352 goto ereqirq;
1353
1354 ret = v4l2_device_register(&pdev->dev, &vou_dev->v4l2_dev);
1355 if (ret < 0) {
1356 dev_err(&pdev->dev, "Error registering v4l2 device\n");
1357 goto ev4l2devreg;
1358 }
1359
1360 /* Allocate memory for video device */
1361 vdev = video_device_alloc();
1362 if (vdev == NULL) {
1363 ret = -ENOMEM;
1364 goto evdevalloc;
1365 }
1366
1367 *vdev = sh_vou_video_template;
1368 if (vou_pdata->bus_fmt == SH_VOU_BUS_8BIT)
1369 vdev->tvnorms |= V4L2_STD_PAL;
1370 vdev->v4l2_dev = &vou_dev->v4l2_dev;
1371 vdev->release = video_device_release;
1372 vdev->lock = &vou_dev->fop_lock;
1373
1374 vou_dev->vdev = vdev;
1375 video_set_drvdata(vdev, vou_dev);
1376
1377 pm_runtime_enable(&pdev->dev);
1378 pm_runtime_resume(&pdev->dev);
1379
1380 i2c_adap = i2c_get_adapter(vou_pdata->i2c_adap);
1381 if (!i2c_adap) {
1382 ret = -ENODEV;
1383 goto ei2cgadap;
1384 }
1385
1386 ret = sh_vou_hw_init(vou_dev);
1387 if (ret < 0)
1388 goto ereset;
1389
1390 subdev = v4l2_i2c_new_subdev_board(&vou_dev->v4l2_dev, i2c_adap,
1391 vou_pdata->board_info, NULL);
1392 if (!subdev) {
1393 ret = -ENOMEM;
1394 goto ei2cnd;
1395 }
1396
1397 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1398 if (ret < 0)
1399 goto evregdev;
1400
1401 return 0;
1402
1403 evregdev:
1404 ei2cnd:
1405 ereset:
1406 i2c_put_adapter(i2c_adap);
1407 ei2cgadap:
1408 video_device_release(vdev);
1409 pm_runtime_disable(&pdev->dev);
1410 evdevalloc:
1411 v4l2_device_unregister(&vou_dev->v4l2_dev);
1412 ev4l2devreg:
1413 free_irq(irq, vou_dev);
1414 ereqirq:
1415 iounmap(vou_dev->base);
1416 emap:
1417 release_mem_region(reg_res->start, resource_size(reg_res));
1418 ereqmemreg:
1419 kfree(vou_dev);
1420 return ret;
1421 }
1422
1423 static int sh_vou_remove(struct platform_device *pdev)
1424 {
1425 int irq = platform_get_irq(pdev, 0);
1426 struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1427 struct sh_vou_device *vou_dev = container_of(v4l2_dev,
1428 struct sh_vou_device, v4l2_dev);
1429 struct v4l2_subdev *sd = list_entry(v4l2_dev->subdevs.next,
1430 struct v4l2_subdev, list);
1431 struct i2c_client *client = v4l2_get_subdevdata(sd);
1432 struct resource *reg_res;
1433
1434 if (irq > 0)
1435 free_irq(irq, vou_dev);
1436 pm_runtime_disable(&pdev->dev);
1437 video_unregister_device(vou_dev->vdev);
1438 i2c_put_adapter(client->adapter);
1439 v4l2_device_unregister(&vou_dev->v4l2_dev);
1440 iounmap(vou_dev->base);
1441 reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1442 if (reg_res)
1443 release_mem_region(reg_res->start, resource_size(reg_res));
1444 kfree(vou_dev);
1445 return 0;
1446 }
1447
1448 static struct platform_driver __refdata sh_vou = {
1449 .remove = sh_vou_remove,
1450 .driver = {
1451 .name = "sh-vou",
1452 .owner = THIS_MODULE,
1453 },
1454 };
1455
1456 module_platform_driver_probe(sh_vou, sh_vou_probe);
1457
1458 MODULE_DESCRIPTION("SuperH VOU driver");
1459 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1460 MODULE_LICENSE("GPL v2");
1461 MODULE_VERSION("0.1.0");
1462 MODULE_ALIAS("platform:sh-vou");
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