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[media] sh-vou: add support for log_status
[deliverable/linux.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/videobuf2-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_MIN_IMAGE_WIDTH 16
61 #define VOU_MAX_IMAGE_WIDTH 720
62 #define VOU_MIN_IMAGE_HEIGHT 16
63
64 struct sh_vou_buffer {
65 struct vb2_buffer vb;
66 struct list_head list;
67 };
68
69 static inline struct sh_vou_buffer *to_sh_vou_buffer(struct vb2_buffer *vb2)
70 {
71 return container_of(vb2, struct sh_vou_buffer, vb);
72 }
73
74 struct sh_vou_device {
75 struct v4l2_device v4l2_dev;
76 struct video_device vdev;
77 struct sh_vou_pdata *pdata;
78 spinlock_t lock;
79 void __iomem *base;
80 /* State information */
81 struct v4l2_pix_format pix;
82 struct v4l2_rect rect;
83 struct list_head buf_list;
84 v4l2_std_id std;
85 int pix_idx;
86 struct vb2_queue queue;
87 struct vb2_alloc_ctx *alloc_ctx;
88 struct sh_vou_buffer *active;
89 enum sh_vou_status status;
90 unsigned sequence;
91 struct mutex fop_lock;
92 };
93
94 /* Register access routines for sides A, B and mirror addresses */
95 static void sh_vou_reg_a_write(struct sh_vou_device *vou_dev, unsigned int reg,
96 u32 value)
97 {
98 __raw_writel(value, vou_dev->base + reg);
99 }
100
101 static void sh_vou_reg_ab_write(struct sh_vou_device *vou_dev, unsigned int reg,
102 u32 value)
103 {
104 __raw_writel(value, vou_dev->base + reg);
105 __raw_writel(value, vou_dev->base + reg + 0x1000);
106 }
107
108 static void sh_vou_reg_m_write(struct sh_vou_device *vou_dev, unsigned int reg,
109 u32 value)
110 {
111 __raw_writel(value, vou_dev->base + reg + 0x2000);
112 }
113
114 static u32 sh_vou_reg_a_read(struct sh_vou_device *vou_dev, unsigned int reg)
115 {
116 return __raw_readl(vou_dev->base + reg);
117 }
118
119 static void sh_vou_reg_a_set(struct sh_vou_device *vou_dev, unsigned int reg,
120 u32 value, u32 mask)
121 {
122 u32 old = __raw_readl(vou_dev->base + reg);
123
124 value = (value & mask) | (old & ~mask);
125 __raw_writel(value, vou_dev->base + reg);
126 }
127
128 static void sh_vou_reg_b_set(struct sh_vou_device *vou_dev, unsigned int reg,
129 u32 value, u32 mask)
130 {
131 sh_vou_reg_a_set(vou_dev, reg + 0x1000, value, mask);
132 }
133
134 static void sh_vou_reg_ab_set(struct sh_vou_device *vou_dev, unsigned int reg,
135 u32 value, u32 mask)
136 {
137 sh_vou_reg_a_set(vou_dev, reg, value, mask);
138 sh_vou_reg_b_set(vou_dev, reg, value, mask);
139 }
140
141 struct sh_vou_fmt {
142 u32 pfmt;
143 char *desc;
144 unsigned char bpp;
145 unsigned char bpl;
146 unsigned char rgb;
147 unsigned char yf;
148 unsigned char pkf;
149 };
150
151 /* Further pixel formats can be added */
152 static struct sh_vou_fmt vou_fmt[] = {
153 {
154 .pfmt = V4L2_PIX_FMT_NV12,
155 .bpp = 12,
156 .bpl = 1,
157 .desc = "YVU420 planar",
158 .yf = 0,
159 .rgb = 0,
160 },
161 {
162 .pfmt = V4L2_PIX_FMT_NV16,
163 .bpp = 16,
164 .bpl = 1,
165 .desc = "YVYU planar",
166 .yf = 1,
167 .rgb = 0,
168 },
169 {
170 .pfmt = V4L2_PIX_FMT_RGB24,
171 .bpp = 24,
172 .bpl = 3,
173 .desc = "RGB24",
174 .pkf = 2,
175 .rgb = 1,
176 },
177 {
178 .pfmt = V4L2_PIX_FMT_RGB565,
179 .bpp = 16,
180 .bpl = 2,
181 .desc = "RGB565",
182 .pkf = 3,
183 .rgb = 1,
184 },
185 {
186 .pfmt = V4L2_PIX_FMT_RGB565X,
187 .bpp = 16,
188 .bpl = 2,
189 .desc = "RGB565 byteswapped",
190 .pkf = 3,
191 .rgb = 1,
192 },
193 };
194
195 static void sh_vou_schedule_next(struct sh_vou_device *vou_dev,
196 struct vb2_buffer *vb)
197 {
198 dma_addr_t addr1, addr2;
199
200 addr1 = vb2_dma_contig_plane_dma_addr(vb, 0);
201 switch (vou_dev->pix.pixelformat) {
202 case V4L2_PIX_FMT_NV12:
203 case V4L2_PIX_FMT_NV16:
204 addr2 = addr1 + vou_dev->pix.width * vou_dev->pix.height;
205 break;
206 default:
207 addr2 = 0;
208 }
209
210 sh_vou_reg_m_write(vou_dev, VOUAD1R, addr1);
211 sh_vou_reg_m_write(vou_dev, VOUAD2R, addr2);
212 }
213
214 static void sh_vou_stream_config(struct sh_vou_device *vou_dev)
215 {
216 unsigned int row_coeff;
217 #ifdef __LITTLE_ENDIAN
218 u32 dataswap = 7;
219 #else
220 u32 dataswap = 0;
221 #endif
222
223 switch (vou_dev->pix.pixelformat) {
224 default:
225 case V4L2_PIX_FMT_NV12:
226 case V4L2_PIX_FMT_NV16:
227 row_coeff = 1;
228 break;
229 case V4L2_PIX_FMT_RGB565:
230 dataswap ^= 1;
231 case V4L2_PIX_FMT_RGB565X:
232 row_coeff = 2;
233 break;
234 case V4L2_PIX_FMT_RGB24:
235 row_coeff = 3;
236 break;
237 }
238
239 sh_vou_reg_a_write(vou_dev, VOUSWR, dataswap);
240 sh_vou_reg_ab_write(vou_dev, VOUAIR, vou_dev->pix.width * row_coeff);
241 }
242
243 /* Locking: caller holds fop_lock mutex */
244 static int sh_vou_queue_setup(struct vb2_queue *vq, const struct v4l2_format *fmt,
245 unsigned int *nbuffers, unsigned int *nplanes,
246 unsigned int sizes[], void *alloc_ctxs[])
247 {
248 struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
249 struct v4l2_pix_format *pix = &vou_dev->pix;
250 int bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
251
252 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
253
254 if (fmt && fmt->fmt.pix.sizeimage < pix->height * bytes_per_line)
255 return -EINVAL;
256 *nplanes = 1;
257 sizes[0] = fmt ? fmt->fmt.pix.sizeimage : pix->height * bytes_per_line;
258 alloc_ctxs[0] = vou_dev->alloc_ctx;
259 return 0;
260 }
261
262 static int sh_vou_buf_prepare(struct vb2_buffer *vb)
263 {
264 struct sh_vou_device *vou_dev = vb2_get_drv_priv(vb->vb2_queue);
265 struct v4l2_pix_format *pix = &vou_dev->pix;
266 unsigned bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
267 unsigned size = pix->height * bytes_per_line;
268
269 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
270
271 if (vb2_plane_size(vb, 0) < size) {
272 /* User buffer too small */
273 dev_warn(vou_dev->v4l2_dev.dev, "buffer too small (%lu < %u)\n",
274 vb2_plane_size(vb, 0), size);
275 return -EINVAL;
276 }
277
278 vb2_set_plane_payload(vb, 0, size);
279 return 0;
280 }
281
282 /* Locking: caller holds fop_lock mutex and vq->irqlock spinlock */
283 static void sh_vou_buf_queue(struct vb2_buffer *vb)
284 {
285 struct sh_vou_device *vou_dev = vb2_get_drv_priv(vb->vb2_queue);
286 struct sh_vou_buffer *shbuf = to_sh_vou_buffer(vb);
287 unsigned long flags;
288
289 spin_lock_irqsave(&vou_dev->lock, flags);
290 list_add_tail(&shbuf->list, &vou_dev->buf_list);
291 spin_unlock_irqrestore(&vou_dev->lock, flags);
292 }
293
294 static int sh_vou_start_streaming(struct vb2_queue *vq, unsigned int count)
295 {
296 struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
297 struct sh_vou_buffer *buf, *node;
298 int ret;
299
300 vou_dev->sequence = 0;
301 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
302 video, s_stream, 1);
303 if (ret < 0 && ret != -ENOIOCTLCMD) {
304 list_for_each_entry_safe(buf, node, &vou_dev->buf_list, list) {
305 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_QUEUED);
306 list_del(&buf->list);
307 }
308 vou_dev->active = NULL;
309 return ret;
310 }
311
312 buf = list_entry(vou_dev->buf_list.next, struct sh_vou_buffer, list);
313
314 vou_dev->active = buf;
315
316 /* Start from side A: we use mirror addresses, so, set B */
317 sh_vou_reg_a_write(vou_dev, VOURPR, 1);
318 dev_dbg(vou_dev->v4l2_dev.dev, "%s: first buffer status 0x%x\n",
319 __func__, sh_vou_reg_a_read(vou_dev, VOUSTR));
320 sh_vou_schedule_next(vou_dev, &buf->vb);
321
322 buf = list_entry(buf->list.next, struct sh_vou_buffer, list);
323
324 /* Second buffer - initialise register side B */
325 sh_vou_reg_a_write(vou_dev, VOURPR, 0);
326 sh_vou_schedule_next(vou_dev, &buf->vb);
327
328 /* Register side switching with frame VSYNC */
329 sh_vou_reg_a_write(vou_dev, VOURCR, 5);
330
331 sh_vou_stream_config(vou_dev);
332 /* Enable End-of-Frame (VSYNC) interrupts */
333 sh_vou_reg_a_write(vou_dev, VOUIR, 0x10004);
334
335 /* Two buffers on the queue - activate the hardware */
336 vou_dev->status = SH_VOU_RUNNING;
337 sh_vou_reg_a_write(vou_dev, VOUER, 0x107);
338 return 0;
339 }
340
341 static void sh_vou_stop_streaming(struct vb2_queue *vq)
342 {
343 struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
344 struct sh_vou_buffer *buf, *node;
345 unsigned long flags;
346
347 v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
348 video, s_stream, 0);
349 /* disable output */
350 sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
351 /* ...but the current frame will complete */
352 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
353 msleep(50);
354 spin_lock_irqsave(&vou_dev->lock, flags);
355 list_for_each_entry_safe(buf, node, &vou_dev->buf_list, list) {
356 vb2_buffer_done(&buf->vb, VB2_BUF_STATE_ERROR);
357 list_del(&buf->list);
358 }
359 vou_dev->active = NULL;
360 spin_unlock_irqrestore(&vou_dev->lock, flags);
361 }
362
363 static struct vb2_ops sh_vou_qops = {
364 .queue_setup = sh_vou_queue_setup,
365 .buf_prepare = sh_vou_buf_prepare,
366 .buf_queue = sh_vou_buf_queue,
367 .start_streaming = sh_vou_start_streaming,
368 .stop_streaming = sh_vou_stop_streaming,
369 .wait_prepare = vb2_ops_wait_prepare,
370 .wait_finish = vb2_ops_wait_finish,
371 };
372
373 /* Video IOCTLs */
374 static int sh_vou_querycap(struct file *file, void *priv,
375 struct v4l2_capability *cap)
376 {
377 struct sh_vou_device *vou_dev = video_drvdata(file);
378
379 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
380
381 strlcpy(cap->card, "SuperH VOU", sizeof(cap->card));
382 strlcpy(cap->driver, "sh-vou", sizeof(cap->driver));
383 strlcpy(cap->bus_info, "platform:sh-vou", sizeof(cap->bus_info));
384 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_READWRITE |
385 V4L2_CAP_STREAMING;
386 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
387 return 0;
388 }
389
390 /* Enumerate formats, that the device can accept from the user */
391 static int sh_vou_enum_fmt_vid_out(struct file *file, void *priv,
392 struct v4l2_fmtdesc *fmt)
393 {
394 struct sh_vou_device *vou_dev = video_drvdata(file);
395
396 if (fmt->index >= ARRAY_SIZE(vou_fmt))
397 return -EINVAL;
398
399 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
400
401 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
402 strlcpy(fmt->description, vou_fmt[fmt->index].desc,
403 sizeof(fmt->description));
404 fmt->pixelformat = vou_fmt[fmt->index].pfmt;
405
406 return 0;
407 }
408
409 static int sh_vou_g_fmt_vid_out(struct file *file, void *priv,
410 struct v4l2_format *fmt)
411 {
412 struct sh_vou_device *vou_dev = video_drvdata(file);
413
414 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
415
416 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
417 fmt->fmt.pix = vou_dev->pix;
418
419 return 0;
420 }
421
422 static const unsigned char vou_scale_h_num[] = {1, 9, 2, 9, 4};
423 static const unsigned char vou_scale_h_den[] = {1, 8, 1, 4, 1};
424 static const unsigned char vou_scale_h_fld[] = {0, 2, 1, 3};
425 static const unsigned char vou_scale_v_num[] = {1, 2, 4};
426 static const unsigned char vou_scale_v_den[] = {1, 1, 1};
427 static const unsigned char vou_scale_v_fld[] = {0, 1};
428
429 static void sh_vou_configure_geometry(struct sh_vou_device *vou_dev,
430 int pix_idx, int w_idx, int h_idx)
431 {
432 struct sh_vou_fmt *fmt = vou_fmt + pix_idx;
433 unsigned int black_left, black_top, width_max,
434 frame_in_height, frame_out_height, frame_out_top;
435 struct v4l2_rect *rect = &vou_dev->rect;
436 struct v4l2_pix_format *pix = &vou_dev->pix;
437 u32 vouvcr = 0, dsr_h, dsr_v;
438
439 if (vou_dev->std & V4L2_STD_525_60) {
440 width_max = 858;
441 /* height_max = 262; */
442 } else {
443 width_max = 864;
444 /* height_max = 312; */
445 }
446
447 frame_in_height = pix->height / 2;
448 frame_out_height = rect->height / 2;
449 frame_out_top = rect->top / 2;
450
451 /*
452 * Cropping scheme: max useful image is 720x480, and the total video
453 * area is 858x525 (NTSC) or 864x625 (PAL). AK8813 / 8814 starts
454 * sampling data beginning with fixed 276th (NTSC) / 288th (PAL) clock,
455 * of which the first 33 / 25 clocks HSYNC must be held active. This
456 * has to be configured in CR[HW]. 1 pixel equals 2 clock periods.
457 * This gives CR[HW] = 16 / 12, VPR[HVP] = 138 / 144, which gives
458 * exactly 858 - 138 = 864 - 144 = 720! We call the out-of-display area,
459 * beyond DSR, specified on the left and top by the VPR register "black
460 * pixels" and out-of-image area (DPR) "background pixels." We fix VPR
461 * at 138 / 144 : 20, because that's the HSYNC timing, that our first
462 * client requires, and that's exactly what leaves us 720 pixels for the
463 * image; we leave VPR[VVP] at default 20 for now, because the client
464 * doesn't seem to have any special requirements for it. Otherwise we
465 * could also set it to max - 240 = 22 / 72. Thus VPR depends only on
466 * the selected standard, and DPR and DSR are selected according to
467 * cropping. Q: how does the client detect the first valid line? Does
468 * HSYNC stay inactive during invalid (black) lines?
469 */
470 black_left = width_max - VOU_MAX_IMAGE_WIDTH;
471 black_top = 20;
472
473 dsr_h = rect->width + rect->left;
474 dsr_v = frame_out_height + frame_out_top;
475
476 dev_dbg(vou_dev->v4l2_dev.dev,
477 "image %ux%u, black %u:%u, offset %u:%u, display %ux%u\n",
478 pix->width, frame_in_height, black_left, black_top,
479 rect->left, frame_out_top, dsr_h, dsr_v);
480
481 /* VOUISR height - half of a frame height in frame mode */
482 sh_vou_reg_ab_write(vou_dev, VOUISR, (pix->width << 16) | frame_in_height);
483 sh_vou_reg_ab_write(vou_dev, VOUVPR, (black_left << 16) | black_top);
484 sh_vou_reg_ab_write(vou_dev, VOUDPR, (rect->left << 16) | frame_out_top);
485 sh_vou_reg_ab_write(vou_dev, VOUDSR, (dsr_h << 16) | dsr_v);
486
487 /*
488 * if necessary, we could set VOUHIR to
489 * max(black_left + dsr_h, width_max) here
490 */
491
492 if (w_idx)
493 vouvcr |= (1 << 15) | (vou_scale_h_fld[w_idx - 1] << 4);
494 if (h_idx)
495 vouvcr |= (1 << 14) | vou_scale_v_fld[h_idx - 1];
496
497 dev_dbg(vou_dev->v4l2_dev.dev, "%s: scaling 0x%x\n", fmt->desc, vouvcr);
498
499 /* To produce a colour bar for testing set bit 23 of VOUVCR */
500 sh_vou_reg_ab_write(vou_dev, VOUVCR, vouvcr);
501 sh_vou_reg_ab_write(vou_dev, VOUDFR,
502 fmt->pkf | (fmt->yf << 8) | (fmt->rgb << 16));
503 }
504
505 struct sh_vou_geometry {
506 struct v4l2_rect output;
507 unsigned int in_width;
508 unsigned int in_height;
509 int scale_idx_h;
510 int scale_idx_v;
511 };
512
513 /*
514 * Find input geometry, that we can use to produce output, closest to the
515 * requested rectangle, using VOU scaling
516 */
517 static void vou_adjust_input(struct sh_vou_geometry *geo, v4l2_std_id std)
518 {
519 /* The compiler cannot know, that best and idx will indeed be set */
520 unsigned int best_err = UINT_MAX, best = 0, img_height_max;
521 int i, idx = 0;
522
523 if (std & V4L2_STD_525_60)
524 img_height_max = 480;
525 else
526 img_height_max = 576;
527
528 /* Image width must be a multiple of 4 */
529 v4l_bound_align_image(&geo->in_width,
530 VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 2,
531 &geo->in_height,
532 VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
533
534 /* Select scales to come as close as possible to the output image */
535 for (i = ARRAY_SIZE(vou_scale_h_num) - 1; i >= 0; i--) {
536 unsigned int err;
537 unsigned int found = geo->output.width * vou_scale_h_den[i] /
538 vou_scale_h_num[i];
539
540 if (found > VOU_MAX_IMAGE_WIDTH)
541 /* scales increase */
542 break;
543
544 err = abs(found - geo->in_width);
545 if (err < best_err) {
546 best_err = err;
547 idx = i;
548 best = found;
549 }
550 if (!err)
551 break;
552 }
553
554 geo->in_width = best;
555 geo->scale_idx_h = idx;
556
557 best_err = UINT_MAX;
558
559 /* This loop can be replaced with one division */
560 for (i = ARRAY_SIZE(vou_scale_v_num) - 1; i >= 0; i--) {
561 unsigned int err;
562 unsigned int found = geo->output.height * vou_scale_v_den[i] /
563 vou_scale_v_num[i];
564
565 if (found > img_height_max)
566 /* scales increase */
567 break;
568
569 err = abs(found - geo->in_height);
570 if (err < best_err) {
571 best_err = err;
572 idx = i;
573 best = found;
574 }
575 if (!err)
576 break;
577 }
578
579 geo->in_height = best;
580 geo->scale_idx_v = idx;
581 }
582
583 /*
584 * Find output geometry, that we can produce, using VOU scaling, closest to
585 * the requested rectangle
586 */
587 static void vou_adjust_output(struct sh_vou_geometry *geo, v4l2_std_id std)
588 {
589 unsigned int best_err = UINT_MAX, best = geo->in_width,
590 width_max, height_max, img_height_max;
591 int i, idx_h = 0, idx_v = 0;
592
593 if (std & V4L2_STD_525_60) {
594 width_max = 858;
595 height_max = 262 * 2;
596 img_height_max = 480;
597 } else {
598 width_max = 864;
599 height_max = 312 * 2;
600 img_height_max = 576;
601 }
602
603 /* Select scales to come as close as possible to the output image */
604 for (i = 0; i < ARRAY_SIZE(vou_scale_h_num); i++) {
605 unsigned int err;
606 unsigned int found = geo->in_width * vou_scale_h_num[i] /
607 vou_scale_h_den[i];
608
609 if (found > VOU_MAX_IMAGE_WIDTH)
610 /* scales increase */
611 break;
612
613 err = abs(found - geo->output.width);
614 if (err < best_err) {
615 best_err = err;
616 idx_h = i;
617 best = found;
618 }
619 if (!err)
620 break;
621 }
622
623 geo->output.width = best;
624 geo->scale_idx_h = idx_h;
625 if (geo->output.left + best > width_max)
626 geo->output.left = width_max - best;
627
628 pr_debug("%s(): W %u * %u/%u = %u\n", __func__, geo->in_width,
629 vou_scale_h_num[idx_h], vou_scale_h_den[idx_h], best);
630
631 best_err = UINT_MAX;
632
633 /* This loop can be replaced with one division */
634 for (i = 0; i < ARRAY_SIZE(vou_scale_v_num); i++) {
635 unsigned int err;
636 unsigned int found = geo->in_height * vou_scale_v_num[i] /
637 vou_scale_v_den[i];
638
639 if (found > img_height_max)
640 /* scales increase */
641 break;
642
643 err = abs(found - geo->output.height);
644 if (err < best_err) {
645 best_err = err;
646 idx_v = i;
647 best = found;
648 }
649 if (!err)
650 break;
651 }
652
653 geo->output.height = best;
654 geo->scale_idx_v = idx_v;
655 if (geo->output.top + best > height_max)
656 geo->output.top = height_max - best;
657
658 pr_debug("%s(): H %u * %u/%u = %u\n", __func__, geo->in_height,
659 vou_scale_v_num[idx_v], vou_scale_v_den[idx_v], best);
660 }
661
662 static int sh_vou_try_fmt_vid_out(struct file *file, void *priv,
663 struct v4l2_format *fmt)
664 {
665 struct sh_vou_device *vou_dev = video_drvdata(file);
666 struct v4l2_pix_format *pix = &fmt->fmt.pix;
667 unsigned int img_height_max;
668 int pix_idx;
669
670 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
671
672 pix->field = V4L2_FIELD_INTERLACED;
673 pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
674 pix->ycbcr_enc = pix->quantization = 0;
675
676 for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
677 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
678 break;
679
680 if (pix_idx == ARRAY_SIZE(vou_fmt))
681 return -EINVAL;
682
683 if (vou_dev->std & V4L2_STD_525_60)
684 img_height_max = 480;
685 else
686 img_height_max = 576;
687
688 v4l_bound_align_image(&pix->width,
689 VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 2,
690 &pix->height,
691 VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
692 pix->bytesperline = pix->width * vou_fmt[pix_idx].bpl;
693 pix->sizeimage = pix->height * ((pix->width * vou_fmt[pix_idx].bpp) >> 3);
694
695 return 0;
696 }
697
698 static int sh_vou_set_fmt_vid_out(struct sh_vou_device *vou_dev,
699 struct v4l2_pix_format *pix)
700 {
701 unsigned int img_height_max;
702 struct sh_vou_geometry geo;
703 struct v4l2_subdev_format format = {
704 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
705 /* Revisit: is this the correct code? */
706 .format.code = MEDIA_BUS_FMT_YUYV8_2X8,
707 .format.field = V4L2_FIELD_INTERLACED,
708 .format.colorspace = V4L2_COLORSPACE_SMPTE170M,
709 };
710 struct v4l2_mbus_framefmt *mbfmt = &format.format;
711 int pix_idx;
712 int ret;
713
714 if (vb2_is_busy(&vou_dev->queue))
715 return -EBUSY;
716
717 for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
718 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
719 break;
720
721 geo.in_width = pix->width;
722 geo.in_height = pix->height;
723 geo.output = vou_dev->rect;
724
725 vou_adjust_output(&geo, vou_dev->std);
726
727 mbfmt->width = geo.output.width;
728 mbfmt->height = geo.output.height;
729 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
730 set_fmt, NULL, &format);
731 /* Must be implemented, so, don't check for -ENOIOCTLCMD */
732 if (ret < 0)
733 return ret;
734
735 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
736 geo.output.width, geo.output.height, mbfmt->width, mbfmt->height);
737
738 if (vou_dev->std & V4L2_STD_525_60)
739 img_height_max = 480;
740 else
741 img_height_max = 576;
742
743 /* Sanity checks */
744 if ((unsigned)mbfmt->width > VOU_MAX_IMAGE_WIDTH ||
745 (unsigned)mbfmt->height > img_height_max ||
746 mbfmt->code != MEDIA_BUS_FMT_YUYV8_2X8)
747 return -EIO;
748
749 if (mbfmt->width != geo.output.width ||
750 mbfmt->height != geo.output.height) {
751 geo.output.width = mbfmt->width;
752 geo.output.height = mbfmt->height;
753
754 vou_adjust_input(&geo, vou_dev->std);
755 }
756
757 /* We tried to preserve output rectangle, but it could have changed */
758 vou_dev->rect = geo.output;
759 pix->width = geo.in_width;
760 pix->height = geo.in_height;
761
762 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u\n", __func__,
763 pix->width, pix->height);
764
765 vou_dev->pix_idx = pix_idx;
766
767 vou_dev->pix = *pix;
768
769 sh_vou_configure_geometry(vou_dev, pix_idx,
770 geo.scale_idx_h, geo.scale_idx_v);
771
772 return 0;
773 }
774
775 static int sh_vou_s_fmt_vid_out(struct file *file, void *priv,
776 struct v4l2_format *fmt)
777 {
778 struct sh_vou_device *vou_dev = video_drvdata(file);
779 int ret = sh_vou_try_fmt_vid_out(file, priv, fmt);
780
781 if (ret)
782 return ret;
783 return sh_vou_set_fmt_vid_out(vou_dev, &fmt->fmt.pix);
784 }
785
786 static int sh_vou_enum_output(struct file *file, void *fh,
787 struct v4l2_output *a)
788 {
789 struct sh_vou_device *vou_dev = video_drvdata(file);
790
791 if (a->index)
792 return -EINVAL;
793 strlcpy(a->name, "Video Out", sizeof(a->name));
794 a->type = V4L2_OUTPUT_TYPE_ANALOG;
795 a->std = vou_dev->vdev.tvnorms;
796 return 0;
797 }
798
799 int sh_vou_g_output(struct file *file, void *fh, unsigned int *i)
800 {
801 *i = 0;
802 return 0;
803 }
804
805 int sh_vou_s_output(struct file *file, void *fh, unsigned int i)
806 {
807 return i ? -EINVAL : 0;
808 }
809
810 static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)
811 {
812 switch (bus_fmt) {
813 default:
814 pr_warning("%s(): Invalid bus-format code %d, using default 8-bit\n",
815 __func__, bus_fmt);
816 case SH_VOU_BUS_8BIT:
817 return 1;
818 case SH_VOU_BUS_16BIT:
819 return 0;
820 case SH_VOU_BUS_BT656:
821 return 3;
822 }
823 }
824
825 static int sh_vou_s_std(struct file *file, void *priv, v4l2_std_id std_id)
826 {
827 struct sh_vou_device *vou_dev = video_drvdata(file);
828 int ret;
829
830 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): 0x%llx\n", __func__, std_id);
831
832 if (std_id == vou_dev->std)
833 return 0;
834
835 if (vb2_is_busy(&vou_dev->queue))
836 return -EBUSY;
837
838 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
839 s_std_output, std_id);
840 /* Shall we continue, if the subdev doesn't support .s_std_output()? */
841 if (ret < 0 && ret != -ENOIOCTLCMD)
842 return ret;
843
844 vou_dev->rect.top = vou_dev->rect.left = 0;
845 vou_dev->rect.width = VOU_MAX_IMAGE_WIDTH;
846 if (std_id & V4L2_STD_525_60) {
847 sh_vou_reg_ab_set(vou_dev, VOUCR,
848 sh_vou_ntsc_mode(vou_dev->pdata->bus_fmt) << 29, 7 << 29);
849 vou_dev->rect.height = 480;
850 } else {
851 sh_vou_reg_ab_set(vou_dev, VOUCR, 5 << 29, 7 << 29);
852 vou_dev->rect.height = 576;
853 }
854
855 vou_dev->pix.width = vou_dev->rect.width;
856 vou_dev->pix.height = vou_dev->rect.height;
857 vou_dev->pix.bytesperline =
858 vou_dev->pix.width * vou_fmt[vou_dev->pix_idx].bpl;
859 vou_dev->pix.sizeimage = vou_dev->pix.height *
860 ((vou_dev->pix.width * vou_fmt[vou_dev->pix_idx].bpp) >> 3);
861 vou_dev->std = std_id;
862 sh_vou_set_fmt_vid_out(vou_dev, &vou_dev->pix);
863
864 return 0;
865 }
866
867 static int sh_vou_g_std(struct file *file, void *priv, v4l2_std_id *std)
868 {
869 struct sh_vou_device *vou_dev = video_drvdata(file);
870
871 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
872
873 *std = vou_dev->std;
874
875 return 0;
876 }
877
878 static int sh_vou_log_status(struct file *file, void *priv)
879 {
880 struct sh_vou_device *vou_dev = video_drvdata(file);
881
882 pr_info("VOUER: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUER));
883 pr_info("VOUCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUCR));
884 pr_info("VOUSTR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSTR));
885 pr_info("VOUVCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUVCR));
886 pr_info("VOUISR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUISR));
887 pr_info("VOUBCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUBCR));
888 pr_info("VOUDPR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDPR));
889 pr_info("VOUDSR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDSR));
890 pr_info("VOUVPR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUVPR));
891 pr_info("VOUIR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUIR));
892 pr_info("VOUSRR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSRR));
893 pr_info("VOUMSR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUMSR));
894 pr_info("VOUHIR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUHIR));
895 pr_info("VOUDFR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDFR));
896 pr_info("VOUAD1R: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAD1R));
897 pr_info("VOUAD2R: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAD2R));
898 pr_info("VOUAIR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAIR));
899 pr_info("VOUSWR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSWR));
900 pr_info("VOURCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOURCR));
901 pr_info("VOURPR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOURPR));
902 return 0;
903 }
904
905 static int sh_vou_g_selection(struct file *file, void *fh,
906 struct v4l2_selection *sel)
907 {
908 struct sh_vou_device *vou_dev = video_drvdata(file);
909
910 if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
911 return -EINVAL;
912 switch (sel->target) {
913 case V4L2_SEL_TGT_COMPOSE:
914 sel->r = vou_dev->rect;
915 break;
916 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
917 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
918 sel->r.left = 0;
919 sel->r.top = 0;
920 sel->r.width = VOU_MAX_IMAGE_WIDTH;
921 if (vou_dev->std & V4L2_STD_525_60)
922 sel->r.height = 480;
923 else
924 sel->r.height = 576;
925 break;
926 default:
927 return -EINVAL;
928 }
929 return 0;
930 }
931
932 /* Assume a dull encoder, do all the work ourselves. */
933 static int sh_vou_s_selection(struct file *file, void *fh,
934 struct v4l2_selection *sel)
935 {
936 struct v4l2_rect *rect = &sel->r;
937 struct sh_vou_device *vou_dev = video_drvdata(file);
938 struct v4l2_crop sd_crop = {.type = V4L2_BUF_TYPE_VIDEO_OUTPUT};
939 struct v4l2_pix_format *pix = &vou_dev->pix;
940 struct sh_vou_geometry geo;
941 struct v4l2_subdev_format format = {
942 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
943 /* Revisit: is this the correct code? */
944 .format.code = MEDIA_BUS_FMT_YUYV8_2X8,
945 .format.field = V4L2_FIELD_INTERLACED,
946 .format.colorspace = V4L2_COLORSPACE_SMPTE170M,
947 };
948 unsigned int img_height_max;
949 int ret;
950
951 if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
952 sel->target != V4L2_SEL_TGT_COMPOSE)
953 return -EINVAL;
954
955 if (vb2_is_busy(&vou_dev->queue))
956 return -EBUSY;
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,
964 VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 1,
965 &rect->height,
966 VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
967
968 if (rect->width + rect->left > VOU_MAX_IMAGE_WIDTH)
969 rect->left = VOU_MAX_IMAGE_WIDTH - rect->width;
970
971 if (rect->height + rect->top > img_height_max)
972 rect->top = img_height_max - rect->height;
973
974 geo.output = *rect;
975 geo.in_width = pix->width;
976 geo.in_height = pix->height;
977
978 /* Configure the encoder one-to-one, position at 0, ignore errors */
979 sd_crop.c.width = geo.output.width;
980 sd_crop.c.height = geo.output.height;
981 /*
982 * We first issue a S_CROP, so that the subsequent S_FMT delivers the
983 * final encoder configuration.
984 */
985 v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
986 s_crop, &sd_crop);
987 format.format.width = geo.output.width;
988 format.format.height = geo.output.height;
989 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
990 set_fmt, NULL, &format);
991 /* Must be implemented, so, don't check for -ENOIOCTLCMD */
992 if (ret < 0)
993 return ret;
994
995 /* Sanity checks */
996 if ((unsigned)format.format.width > VOU_MAX_IMAGE_WIDTH ||
997 (unsigned)format.format.height > img_height_max ||
998 format.format.code != MEDIA_BUS_FMT_YUYV8_2X8)
999 return -EIO;
1000
1001 geo.output.width = format.format.width;
1002 geo.output.height = format.format.height;
1003
1004 /*
1005 * No down-scaling. According to the API, current call has precedence:
1006 * http://v4l2spec.bytesex.org/spec/x1904.htm#AEN1954 paragraph two.
1007 */
1008 vou_adjust_input(&geo, vou_dev->std);
1009
1010 /* We tried to preserve output rectangle, but it could have changed */
1011 vou_dev->rect = geo.output;
1012 pix->width = geo.in_width;
1013 pix->height = geo.in_height;
1014
1015 sh_vou_configure_geometry(vou_dev, vou_dev->pix_idx,
1016 geo.scale_idx_h, geo.scale_idx_v);
1017
1018 return 0;
1019 }
1020
1021 static irqreturn_t sh_vou_isr(int irq, void *dev_id)
1022 {
1023 struct sh_vou_device *vou_dev = dev_id;
1024 static unsigned long j;
1025 struct sh_vou_buffer *vb;
1026 static int cnt;
1027 u32 irq_status = sh_vou_reg_a_read(vou_dev, VOUIR), masked;
1028 u32 vou_status = sh_vou_reg_a_read(vou_dev, VOUSTR);
1029
1030 if (!(irq_status & 0x300)) {
1031 if (printk_timed_ratelimit(&j, 500))
1032 dev_warn(vou_dev->v4l2_dev.dev, "IRQ status 0x%x!\n",
1033 irq_status);
1034 return IRQ_NONE;
1035 }
1036
1037 spin_lock(&vou_dev->lock);
1038 if (!vou_dev->active || list_empty(&vou_dev->buf_list)) {
1039 if (printk_timed_ratelimit(&j, 500))
1040 dev_warn(vou_dev->v4l2_dev.dev,
1041 "IRQ without active buffer: %x!\n", irq_status);
1042 /* Just ack: buf_release will disable further interrupts */
1043 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x300);
1044 spin_unlock(&vou_dev->lock);
1045 return IRQ_HANDLED;
1046 }
1047
1048 masked = ~(0x300 & irq_status) & irq_status & 0x30304;
1049 dev_dbg(vou_dev->v4l2_dev.dev,
1050 "IRQ status 0x%x -> 0x%x, VOU status 0x%x, cnt %d\n",
1051 irq_status, masked, vou_status, cnt);
1052
1053 cnt++;
1054 /* side = vou_status & 0x10000; */
1055
1056 /* Clear only set interrupts */
1057 sh_vou_reg_a_write(vou_dev, VOUIR, masked);
1058
1059 vb = vou_dev->active;
1060 if (list_is_singular(&vb->list)) {
1061 /* Keep cycling while no next buffer is available */
1062 sh_vou_schedule_next(vou_dev, &vb->vb);
1063 spin_unlock(&vou_dev->lock);
1064 return IRQ_HANDLED;
1065 }
1066
1067 list_del(&vb->list);
1068
1069 v4l2_get_timestamp(&vb->vb.v4l2_buf.timestamp);
1070 vb->vb.v4l2_buf.sequence = vou_dev->sequence++;
1071 vb->vb.v4l2_buf.field = V4L2_FIELD_INTERLACED;
1072 vb2_buffer_done(&vb->vb, VB2_BUF_STATE_DONE);
1073
1074 vou_dev->active = list_entry(vou_dev->buf_list.next,
1075 struct sh_vou_buffer, list);
1076
1077 if (list_is_singular(&vou_dev->buf_list)) {
1078 /* Keep cycling while no next buffer is available */
1079 sh_vou_schedule_next(vou_dev, &vou_dev->active->vb);
1080 } else {
1081 struct sh_vou_buffer *new = list_entry(vou_dev->active->list.next,
1082 struct sh_vou_buffer, list);
1083 sh_vou_schedule_next(vou_dev, &new->vb);
1084 }
1085
1086 spin_unlock(&vou_dev->lock);
1087
1088 return IRQ_HANDLED;
1089 }
1090
1091 static int sh_vou_hw_init(struct sh_vou_device *vou_dev)
1092 {
1093 struct sh_vou_pdata *pdata = vou_dev->pdata;
1094 u32 voucr = sh_vou_ntsc_mode(pdata->bus_fmt) << 29;
1095 int i = 100;
1096
1097 /* Disable all IRQs */
1098 sh_vou_reg_a_write(vou_dev, VOUIR, 0);
1099
1100 /* Reset VOU interfaces - registers unaffected */
1101 sh_vou_reg_a_write(vou_dev, VOUSRR, 0x101);
1102 while (--i && (sh_vou_reg_a_read(vou_dev, VOUSRR) & 0x101))
1103 udelay(1);
1104
1105 if (!i)
1106 return -ETIMEDOUT;
1107
1108 dev_dbg(vou_dev->v4l2_dev.dev, "Reset took %dus\n", 100 - i);
1109
1110 if (pdata->flags & SH_VOU_PCLK_FALLING)
1111 voucr |= 1 << 28;
1112 if (pdata->flags & SH_VOU_HSYNC_LOW)
1113 voucr |= 1 << 27;
1114 if (pdata->flags & SH_VOU_VSYNC_LOW)
1115 voucr |= 1 << 26;
1116 sh_vou_reg_ab_set(vou_dev, VOUCR, voucr, 0xfc000000);
1117
1118 /* Manual register side switching at first */
1119 sh_vou_reg_a_write(vou_dev, VOURCR, 4);
1120 /* Default - fixed HSYNC length, can be made configurable is required */
1121 sh_vou_reg_ab_write(vou_dev, VOUMSR, 0x800000);
1122
1123 sh_vou_set_fmt_vid_out(vou_dev, &vou_dev->pix);
1124
1125 return 0;
1126 }
1127
1128 /* File operations */
1129 static int sh_vou_open(struct file *file)
1130 {
1131 struct sh_vou_device *vou_dev = video_drvdata(file);
1132 int err;
1133
1134 if (mutex_lock_interruptible(&vou_dev->fop_lock))
1135 return -ERESTARTSYS;
1136
1137 err = v4l2_fh_open(file);
1138 if (err)
1139 goto done_open;
1140 if (v4l2_fh_is_singular_file(file) &&
1141 vou_dev->status == SH_VOU_INITIALISING) {
1142 /* First open */
1143 pm_runtime_get_sync(vou_dev->v4l2_dev.dev);
1144 err = sh_vou_hw_init(vou_dev);
1145 if (err < 0) {
1146 pm_runtime_put(vou_dev->v4l2_dev.dev);
1147 v4l2_fh_release(file);
1148 } else {
1149 vou_dev->status = SH_VOU_IDLE;
1150 }
1151 }
1152 done_open:
1153 mutex_unlock(&vou_dev->fop_lock);
1154 return err;
1155 }
1156
1157 static int sh_vou_release(struct file *file)
1158 {
1159 struct sh_vou_device *vou_dev = video_drvdata(file);
1160 bool is_last;
1161
1162 mutex_lock(&vou_dev->fop_lock);
1163 is_last = v4l2_fh_is_singular_file(file);
1164 _vb2_fop_release(file, NULL);
1165 if (is_last) {
1166 /* Last close */
1167 vou_dev->status = SH_VOU_INITIALISING;
1168 sh_vou_reg_a_set(vou_dev, VOUER, 0, 0x101);
1169 pm_runtime_put(vou_dev->v4l2_dev.dev);
1170 }
1171 mutex_unlock(&vou_dev->fop_lock);
1172 return 0;
1173 }
1174
1175 /* sh_vou display ioctl operations */
1176 static const struct v4l2_ioctl_ops sh_vou_ioctl_ops = {
1177 .vidioc_querycap = sh_vou_querycap,
1178 .vidioc_enum_fmt_vid_out = sh_vou_enum_fmt_vid_out,
1179 .vidioc_g_fmt_vid_out = sh_vou_g_fmt_vid_out,
1180 .vidioc_s_fmt_vid_out = sh_vou_s_fmt_vid_out,
1181 .vidioc_try_fmt_vid_out = sh_vou_try_fmt_vid_out,
1182 .vidioc_reqbufs = vb2_ioctl_reqbufs,
1183 .vidioc_create_bufs = vb2_ioctl_create_bufs,
1184 .vidioc_querybuf = vb2_ioctl_querybuf,
1185 .vidioc_qbuf = vb2_ioctl_qbuf,
1186 .vidioc_dqbuf = vb2_ioctl_dqbuf,
1187 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
1188 .vidioc_streamon = vb2_ioctl_streamon,
1189 .vidioc_streamoff = vb2_ioctl_streamoff,
1190 .vidioc_expbuf = vb2_ioctl_expbuf,
1191 .vidioc_g_output = sh_vou_g_output,
1192 .vidioc_s_output = sh_vou_s_output,
1193 .vidioc_enum_output = sh_vou_enum_output,
1194 .vidioc_s_std = sh_vou_s_std,
1195 .vidioc_g_std = sh_vou_g_std,
1196 .vidioc_g_selection = sh_vou_g_selection,
1197 .vidioc_s_selection = sh_vou_s_selection,
1198 .vidioc_log_status = sh_vou_log_status,
1199 };
1200
1201 static const struct v4l2_file_operations sh_vou_fops = {
1202 .owner = THIS_MODULE,
1203 .open = sh_vou_open,
1204 .release = sh_vou_release,
1205 .unlocked_ioctl = video_ioctl2,
1206 .mmap = vb2_fop_mmap,
1207 .poll = vb2_fop_poll,
1208 .write = vb2_fop_write,
1209 };
1210
1211 static const struct video_device sh_vou_video_template = {
1212 .name = "sh_vou",
1213 .fops = &sh_vou_fops,
1214 .ioctl_ops = &sh_vou_ioctl_ops,
1215 .tvnorms = V4L2_STD_525_60, /* PAL only supported in 8-bit non-bt656 mode */
1216 .vfl_dir = VFL_DIR_TX,
1217 };
1218
1219 static int sh_vou_probe(struct platform_device *pdev)
1220 {
1221 struct sh_vou_pdata *vou_pdata = pdev->dev.platform_data;
1222 struct v4l2_rect *rect;
1223 struct v4l2_pix_format *pix;
1224 struct i2c_adapter *i2c_adap;
1225 struct video_device *vdev;
1226 struct sh_vou_device *vou_dev;
1227 struct resource *reg_res;
1228 struct v4l2_subdev *subdev;
1229 struct vb2_queue *q;
1230 int irq, ret;
1231
1232 reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1233 irq = platform_get_irq(pdev, 0);
1234
1235 if (!vou_pdata || !reg_res || irq <= 0) {
1236 dev_err(&pdev->dev, "Insufficient VOU platform information.\n");
1237 return -ENODEV;
1238 }
1239
1240 vou_dev = devm_kzalloc(&pdev->dev, sizeof(*vou_dev), GFP_KERNEL);
1241 if (!vou_dev)
1242 return -ENOMEM;
1243
1244 INIT_LIST_HEAD(&vou_dev->buf_list);
1245 spin_lock_init(&vou_dev->lock);
1246 mutex_init(&vou_dev->fop_lock);
1247 vou_dev->pdata = vou_pdata;
1248 vou_dev->status = SH_VOU_INITIALISING;
1249 vou_dev->pix_idx = 1;
1250
1251 rect = &vou_dev->rect;
1252 pix = &vou_dev->pix;
1253
1254 /* Fill in defaults */
1255 vou_dev->std = V4L2_STD_NTSC_M;
1256 rect->left = 0;
1257 rect->top = 0;
1258 rect->width = VOU_MAX_IMAGE_WIDTH;
1259 rect->height = 480;
1260 pix->width = VOU_MAX_IMAGE_WIDTH;
1261 pix->height = 480;
1262 pix->pixelformat = V4L2_PIX_FMT_NV16;
1263 pix->field = V4L2_FIELD_INTERLACED;
1264 pix->bytesperline = VOU_MAX_IMAGE_WIDTH;
1265 pix->sizeimage = VOU_MAX_IMAGE_WIDTH * 2 * 480;
1266 pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
1267
1268 vou_dev->base = devm_ioremap_resource(&pdev->dev, reg_res);
1269 if (IS_ERR(vou_dev->base))
1270 return PTR_ERR(vou_dev->base);
1271
1272 ret = devm_request_irq(&pdev->dev, irq, sh_vou_isr, 0, "vou", vou_dev);
1273 if (ret < 0)
1274 return ret;
1275
1276 ret = v4l2_device_register(&pdev->dev, &vou_dev->v4l2_dev);
1277 if (ret < 0) {
1278 dev_err(&pdev->dev, "Error registering v4l2 device\n");
1279 return ret;
1280 }
1281
1282 vdev = &vou_dev->vdev;
1283 *vdev = sh_vou_video_template;
1284 if (vou_pdata->bus_fmt == SH_VOU_BUS_8BIT)
1285 vdev->tvnorms |= V4L2_STD_PAL;
1286 vdev->v4l2_dev = &vou_dev->v4l2_dev;
1287 vdev->release = video_device_release_empty;
1288 vdev->lock = &vou_dev->fop_lock;
1289
1290 video_set_drvdata(vdev, vou_dev);
1291
1292 /* Initialize the vb2 queue */
1293 q = &vou_dev->queue;
1294 q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1295 q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_WRITE;
1296 q->drv_priv = vou_dev;
1297 q->buf_struct_size = sizeof(struct sh_vou_buffer);
1298 q->ops = &sh_vou_qops;
1299 q->mem_ops = &vb2_dma_contig_memops;
1300 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1301 q->min_buffers_needed = 2;
1302 q->lock = &vou_dev->fop_lock;
1303 ret = vb2_queue_init(q);
1304 if (ret)
1305 goto einitctx;
1306
1307 vou_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1308 if (IS_ERR(vou_dev->alloc_ctx)) {
1309 dev_err(&pdev->dev, "Can't allocate buffer context");
1310 ret = PTR_ERR(vou_dev->alloc_ctx);
1311 goto einitctx;
1312 }
1313 vdev->queue = q;
1314 INIT_LIST_HEAD(&vou_dev->buf_list);
1315
1316 pm_runtime_enable(&pdev->dev);
1317 pm_runtime_resume(&pdev->dev);
1318
1319 i2c_adap = i2c_get_adapter(vou_pdata->i2c_adap);
1320 if (!i2c_adap) {
1321 ret = -ENODEV;
1322 goto ei2cgadap;
1323 }
1324
1325 ret = sh_vou_hw_init(vou_dev);
1326 if (ret < 0)
1327 goto ereset;
1328
1329 subdev = v4l2_i2c_new_subdev_board(&vou_dev->v4l2_dev, i2c_adap,
1330 vou_pdata->board_info, NULL);
1331 if (!subdev) {
1332 ret = -ENOMEM;
1333 goto ei2cnd;
1334 }
1335
1336 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1337 if (ret < 0)
1338 goto evregdev;
1339
1340 return 0;
1341
1342 evregdev:
1343 ei2cnd:
1344 ereset:
1345 i2c_put_adapter(i2c_adap);
1346 ei2cgadap:
1347 vb2_dma_contig_cleanup_ctx(vou_dev->alloc_ctx);
1348 einitctx:
1349 pm_runtime_disable(&pdev->dev);
1350 v4l2_device_unregister(&vou_dev->v4l2_dev);
1351 return ret;
1352 }
1353
1354 static int sh_vou_remove(struct platform_device *pdev)
1355 {
1356 struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1357 struct sh_vou_device *vou_dev = container_of(v4l2_dev,
1358 struct sh_vou_device, v4l2_dev);
1359 struct v4l2_subdev *sd = list_entry(v4l2_dev->subdevs.next,
1360 struct v4l2_subdev, list);
1361 struct i2c_client *client = v4l2_get_subdevdata(sd);
1362
1363 pm_runtime_disable(&pdev->dev);
1364 video_unregister_device(&vou_dev->vdev);
1365 i2c_put_adapter(client->adapter);
1366 vb2_dma_contig_cleanup_ctx(vou_dev->alloc_ctx);
1367 v4l2_device_unregister(&vou_dev->v4l2_dev);
1368 return 0;
1369 }
1370
1371 static struct platform_driver __refdata sh_vou = {
1372 .remove = sh_vou_remove,
1373 .driver = {
1374 .name = "sh-vou",
1375 },
1376 };
1377
1378 module_platform_driver_probe(sh_vou, sh_vou_probe);
1379
1380 MODULE_DESCRIPTION("SuperH VOU driver");
1381 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1382 MODULE_LICENSE("GPL v2");
1383 MODULE_VERSION("0.1.0");
1384 MODULE_ALIAS("platform:sh-vou");
Linux kernel - Deliverables
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