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Merge remote-tracking branches 'spi/topic/spidev-test', 'spi/topic/ti-qspi', 'spi...
[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/drv-intf/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-v4l2.h>
31 #include <media/videobuf2-dma-contig.h>
32
33 /* Mirror addresses are not available for all registers */
34 #define VOUER 0
35 #define VOUCR 4
36 #define VOUSTR 8
37 #define VOUVCR 0xc
38 #define VOUISR 0x10
39 #define VOUBCR 0x14
40 #define VOUDPR 0x18
41 #define VOUDSR 0x1c
42 #define VOUVPR 0x20
43 #define VOUIR 0x24
44 #define VOUSRR 0x28
45 #define VOUMSR 0x2c
46 #define VOUHIR 0x30
47 #define VOUDFR 0x34
48 #define VOUAD1R 0x38
49 #define VOUAD2R 0x3c
50 #define VOUAIR 0x40
51 #define VOUSWR 0x44
52 #define VOURCR 0x48
53 #define VOURPR 0x50
54
55 enum sh_vou_status {
56 SH_VOU_IDLE,
57 SH_VOU_INITIALISING,
58 SH_VOU_RUNNING,
59 };
60
61 #define VOU_MIN_IMAGE_WIDTH 16
62 #define VOU_MAX_IMAGE_WIDTH 720
63 #define VOU_MIN_IMAGE_HEIGHT 16
64
65 struct sh_vou_buffer {
66 struct vb2_v4l2_buffer vb;
67 struct list_head list;
68 };
69
70 static inline struct
71 sh_vou_buffer *to_sh_vou_buffer(struct vb2_v4l2_buffer *vb2)
72 {
73 return container_of(vb2, struct sh_vou_buffer, vb);
74 }
75
76 struct sh_vou_device {
77 struct v4l2_device v4l2_dev;
78 struct video_device vdev;
79 struct sh_vou_pdata *pdata;
80 spinlock_t lock;
81 void __iomem *base;
82 /* State information */
83 struct v4l2_pix_format pix;
84 struct v4l2_rect rect;
85 struct list_head buf_list;
86 v4l2_std_id std;
87 int pix_idx;
88 struct vb2_queue queue;
89 struct sh_vou_buffer *active;
90 enum sh_vou_status status;
91 unsigned sequence;
92 struct mutex fop_lock;
93 };
94
95 /* Register access routines for sides A, B and mirror addresses */
96 static void sh_vou_reg_a_write(struct sh_vou_device *vou_dev, unsigned int reg,
97 u32 value)
98 {
99 __raw_writel(value, vou_dev->base + reg);
100 }
101
102 static void sh_vou_reg_ab_write(struct sh_vou_device *vou_dev, unsigned int reg,
103 u32 value)
104 {
105 __raw_writel(value, vou_dev->base + reg);
106 __raw_writel(value, vou_dev->base + reg + 0x1000);
107 }
108
109 static void sh_vou_reg_m_write(struct sh_vou_device *vou_dev, unsigned int reg,
110 u32 value)
111 {
112 __raw_writel(value, vou_dev->base + reg + 0x2000);
113 }
114
115 static u32 sh_vou_reg_a_read(struct sh_vou_device *vou_dev, unsigned int reg)
116 {
117 return __raw_readl(vou_dev->base + reg);
118 }
119
120 static void sh_vou_reg_a_set(struct sh_vou_device *vou_dev, unsigned int reg,
121 u32 value, u32 mask)
122 {
123 u32 old = __raw_readl(vou_dev->base + reg);
124
125 value = (value & mask) | (old & ~mask);
126 __raw_writel(value, vou_dev->base + reg);
127 }
128
129 static void sh_vou_reg_b_set(struct sh_vou_device *vou_dev, unsigned int reg,
130 u32 value, u32 mask)
131 {
132 sh_vou_reg_a_set(vou_dev, reg + 0x1000, value, mask);
133 }
134
135 static void sh_vou_reg_ab_set(struct sh_vou_device *vou_dev, unsigned int reg,
136 u32 value, u32 mask)
137 {
138 sh_vou_reg_a_set(vou_dev, reg, value, mask);
139 sh_vou_reg_b_set(vou_dev, reg, value, mask);
140 }
141
142 struct sh_vou_fmt {
143 u32 pfmt;
144 char *desc;
145 unsigned char bpp;
146 unsigned char bpl;
147 unsigned char rgb;
148 unsigned char yf;
149 unsigned char pkf;
150 };
151
152 /* Further pixel formats can be added */
153 static struct sh_vou_fmt vou_fmt[] = {
154 {
155 .pfmt = V4L2_PIX_FMT_NV12,
156 .bpp = 12,
157 .bpl = 1,
158 .desc = "YVU420 planar",
159 .yf = 0,
160 .rgb = 0,
161 },
162 {
163 .pfmt = V4L2_PIX_FMT_NV16,
164 .bpp = 16,
165 .bpl = 1,
166 .desc = "YVYU planar",
167 .yf = 1,
168 .rgb = 0,
169 },
170 {
171 .pfmt = V4L2_PIX_FMT_RGB24,
172 .bpp = 24,
173 .bpl = 3,
174 .desc = "RGB24",
175 .pkf = 2,
176 .rgb = 1,
177 },
178 {
179 .pfmt = V4L2_PIX_FMT_RGB565,
180 .bpp = 16,
181 .bpl = 2,
182 .desc = "RGB565",
183 .pkf = 3,
184 .rgb = 1,
185 },
186 {
187 .pfmt = V4L2_PIX_FMT_RGB565X,
188 .bpp = 16,
189 .bpl = 2,
190 .desc = "RGB565 byteswapped",
191 .pkf = 3,
192 .rgb = 1,
193 },
194 };
195
196 static void sh_vou_schedule_next(struct sh_vou_device *vou_dev,
197 struct vb2_v4l2_buffer *vbuf)
198 {
199 dma_addr_t addr1, addr2;
200
201 addr1 = vb2_dma_contig_plane_dma_addr(&vbuf->vb2_buf, 0);
202 switch (vou_dev->pix.pixelformat) {
203 case V4L2_PIX_FMT_NV12:
204 case V4L2_PIX_FMT_NV16:
205 addr2 = addr1 + vou_dev->pix.width * vou_dev->pix.height;
206 break;
207 default:
208 addr2 = 0;
209 }
210
211 sh_vou_reg_m_write(vou_dev, VOUAD1R, addr1);
212 sh_vou_reg_m_write(vou_dev, VOUAD2R, addr2);
213 }
214
215 static void sh_vou_stream_config(struct sh_vou_device *vou_dev)
216 {
217 unsigned int row_coeff;
218 #ifdef __LITTLE_ENDIAN
219 u32 dataswap = 7;
220 #else
221 u32 dataswap = 0;
222 #endif
223
224 switch (vou_dev->pix.pixelformat) {
225 default:
226 case V4L2_PIX_FMT_NV12:
227 case V4L2_PIX_FMT_NV16:
228 row_coeff = 1;
229 break;
230 case V4L2_PIX_FMT_RGB565:
231 dataswap ^= 1;
232 case V4L2_PIX_FMT_RGB565X:
233 row_coeff = 2;
234 break;
235 case V4L2_PIX_FMT_RGB24:
236 row_coeff = 3;
237 break;
238 }
239
240 sh_vou_reg_a_write(vou_dev, VOUSWR, dataswap);
241 sh_vou_reg_ab_write(vou_dev, VOUAIR, vou_dev->pix.width * row_coeff);
242 }
243
244 /* Locking: caller holds fop_lock mutex */
245 static int sh_vou_queue_setup(struct vb2_queue *vq,
246 unsigned int *nbuffers, unsigned int *nplanes,
247 unsigned int sizes[], struct device *alloc_devs[])
248 {
249 struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
250 struct v4l2_pix_format *pix = &vou_dev->pix;
251 int bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
252
253 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
254
255 if (*nplanes)
256 return sizes[0] < pix->height * bytes_per_line ? -EINVAL : 0;
257 *nplanes = 1;
258 sizes[0] = pix->height * bytes_per_line;
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 vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
286 struct sh_vou_device *vou_dev = vb2_get_drv_priv(vb->vb2_queue);
287 struct sh_vou_buffer *shbuf = to_sh_vou_buffer(vbuf);
288 unsigned long flags;
289
290 spin_lock_irqsave(&vou_dev->lock, flags);
291 list_add_tail(&shbuf->list, &vou_dev->buf_list);
292 spin_unlock_irqrestore(&vou_dev->lock, flags);
293 }
294
295 static int sh_vou_start_streaming(struct vb2_queue *vq, unsigned int count)
296 {
297 struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
298 struct sh_vou_buffer *buf, *node;
299 int ret;
300
301 vou_dev->sequence = 0;
302 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
303 video, s_stream, 1);
304 if (ret < 0 && ret != -ENOIOCTLCMD) {
305 list_for_each_entry_safe(buf, node, &vou_dev->buf_list, list) {
306 vb2_buffer_done(&buf->vb.vb2_buf,
307 VB2_BUF_STATE_QUEUED);
308 list_del(&buf->list);
309 }
310 vou_dev->active = NULL;
311 return ret;
312 }
313
314 buf = list_entry(vou_dev->buf_list.next, struct sh_vou_buffer, list);
315
316 vou_dev->active = buf;
317
318 /* Start from side A: we use mirror addresses, so, set B */
319 sh_vou_reg_a_write(vou_dev, VOURPR, 1);
320 dev_dbg(vou_dev->v4l2_dev.dev, "%s: first buffer status 0x%x\n",
321 __func__, sh_vou_reg_a_read(vou_dev, VOUSTR));
322 sh_vou_schedule_next(vou_dev, &buf->vb);
323
324 buf = list_entry(buf->list.next, struct sh_vou_buffer, list);
325
326 /* Second buffer - initialise register side B */
327 sh_vou_reg_a_write(vou_dev, VOURPR, 0);
328 sh_vou_schedule_next(vou_dev, &buf->vb);
329
330 /* Register side switching with frame VSYNC */
331 sh_vou_reg_a_write(vou_dev, VOURCR, 5);
332
333 sh_vou_stream_config(vou_dev);
334 /* Enable End-of-Frame (VSYNC) interrupts */
335 sh_vou_reg_a_write(vou_dev, VOUIR, 0x10004);
336
337 /* Two buffers on the queue - activate the hardware */
338 vou_dev->status = SH_VOU_RUNNING;
339 sh_vou_reg_a_write(vou_dev, VOUER, 0x107);
340 return 0;
341 }
342
343 static void sh_vou_stop_streaming(struct vb2_queue *vq)
344 {
345 struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
346 struct sh_vou_buffer *buf, *node;
347 unsigned long flags;
348
349 v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
350 video, s_stream, 0);
351 /* disable output */
352 sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
353 /* ...but the current frame will complete */
354 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
355 msleep(50);
356 spin_lock_irqsave(&vou_dev->lock, flags);
357 list_for_each_entry_safe(buf, node, &vou_dev->buf_list, list) {
358 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
359 list_del(&buf->list);
360 }
361 vou_dev->active = NULL;
362 spin_unlock_irqrestore(&vou_dev->lock, flags);
363 }
364
365 static struct vb2_ops sh_vou_qops = {
366 .queue_setup = sh_vou_queue_setup,
367 .buf_prepare = sh_vou_buf_prepare,
368 .buf_queue = sh_vou_buf_queue,
369 .start_streaming = sh_vou_start_streaming,
370 .stop_streaming = sh_vou_stop_streaming,
371 .wait_prepare = vb2_ops_wait_prepare,
372 .wait_finish = vb2_ops_wait_finish,
373 };
374
375 /* Video IOCTLs */
376 static int sh_vou_querycap(struct file *file, void *priv,
377 struct v4l2_capability *cap)
378 {
379 struct sh_vou_device *vou_dev = video_drvdata(file);
380
381 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
382
383 strlcpy(cap->card, "SuperH VOU", sizeof(cap->card));
384 strlcpy(cap->driver, "sh-vou", sizeof(cap->driver));
385 strlcpy(cap->bus_info, "platform:sh-vou", sizeof(cap->bus_info));
386 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_READWRITE |
387 V4L2_CAP_STREAMING;
388 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
389 return 0;
390 }
391
392 /* Enumerate formats, that the device can accept from the user */
393 static int sh_vou_enum_fmt_vid_out(struct file *file, void *priv,
394 struct v4l2_fmtdesc *fmt)
395 {
396 struct sh_vou_device *vou_dev = video_drvdata(file);
397
398 if (fmt->index >= ARRAY_SIZE(vou_fmt))
399 return -EINVAL;
400
401 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
402
403 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
404 strlcpy(fmt->description, vou_fmt[fmt->index].desc,
405 sizeof(fmt->description));
406 fmt->pixelformat = vou_fmt[fmt->index].pfmt;
407
408 return 0;
409 }
410
411 static int sh_vou_g_fmt_vid_out(struct file *file, void *priv,
412 struct v4l2_format *fmt)
413 {
414 struct sh_vou_device *vou_dev = video_drvdata(file);
415
416 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
417
418 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
419 fmt->fmt.pix = vou_dev->pix;
420
421 return 0;
422 }
423
424 static const unsigned char vou_scale_h_num[] = {1, 9, 2, 9, 4};
425 static const unsigned char vou_scale_h_den[] = {1, 8, 1, 4, 1};
426 static const unsigned char vou_scale_h_fld[] = {0, 2, 1, 3};
427 static const unsigned char vou_scale_v_num[] = {1, 2, 4};
428 static const unsigned char vou_scale_v_den[] = {1, 1, 1};
429 static const unsigned char vou_scale_v_fld[] = {0, 1};
430
431 static void sh_vou_configure_geometry(struct sh_vou_device *vou_dev,
432 int pix_idx, int w_idx, int h_idx)
433 {
434 struct sh_vou_fmt *fmt = vou_fmt + pix_idx;
435 unsigned int black_left, black_top, width_max,
436 frame_in_height, frame_out_height, frame_out_top;
437 struct v4l2_rect *rect = &vou_dev->rect;
438 struct v4l2_pix_format *pix = &vou_dev->pix;
439 u32 vouvcr = 0, dsr_h, dsr_v;
440
441 if (vou_dev->std & V4L2_STD_525_60) {
442 width_max = 858;
443 /* height_max = 262; */
444 } else {
445 width_max = 864;
446 /* height_max = 312; */
447 }
448
449 frame_in_height = pix->height / 2;
450 frame_out_height = rect->height / 2;
451 frame_out_top = rect->top / 2;
452
453 /*
454 * Cropping scheme: max useful image is 720x480, and the total video
455 * area is 858x525 (NTSC) or 864x625 (PAL). AK8813 / 8814 starts
456 * sampling data beginning with fixed 276th (NTSC) / 288th (PAL) clock,
457 * of which the first 33 / 25 clocks HSYNC must be held active. This
458 * has to be configured in CR[HW]. 1 pixel equals 2 clock periods.
459 * This gives CR[HW] = 16 / 12, VPR[HVP] = 138 / 144, which gives
460 * exactly 858 - 138 = 864 - 144 = 720! We call the out-of-display area,
461 * beyond DSR, specified on the left and top by the VPR register "black
462 * pixels" and out-of-image area (DPR) "background pixels." We fix VPR
463 * at 138 / 144 : 20, because that's the HSYNC timing, that our first
464 * client requires, and that's exactly what leaves us 720 pixels for the
465 * image; we leave VPR[VVP] at default 20 for now, because the client
466 * doesn't seem to have any special requirements for it. Otherwise we
467 * could also set it to max - 240 = 22 / 72. Thus VPR depends only on
468 * the selected standard, and DPR and DSR are selected according to
469 * cropping. Q: how does the client detect the first valid line? Does
470 * HSYNC stay inactive during invalid (black) lines?
471 */
472 black_left = width_max - VOU_MAX_IMAGE_WIDTH;
473 black_top = 20;
474
475 dsr_h = rect->width + rect->left;
476 dsr_v = frame_out_height + frame_out_top;
477
478 dev_dbg(vou_dev->v4l2_dev.dev,
479 "image %ux%u, black %u:%u, offset %u:%u, display %ux%u\n",
480 pix->width, frame_in_height, black_left, black_top,
481 rect->left, frame_out_top, dsr_h, dsr_v);
482
483 /* VOUISR height - half of a frame height in frame mode */
484 sh_vou_reg_ab_write(vou_dev, VOUISR, (pix->width << 16) | frame_in_height);
485 sh_vou_reg_ab_write(vou_dev, VOUVPR, (black_left << 16) | black_top);
486 sh_vou_reg_ab_write(vou_dev, VOUDPR, (rect->left << 16) | frame_out_top);
487 sh_vou_reg_ab_write(vou_dev, VOUDSR, (dsr_h << 16) | dsr_v);
488
489 /*
490 * if necessary, we could set VOUHIR to
491 * max(black_left + dsr_h, width_max) here
492 */
493
494 if (w_idx)
495 vouvcr |= (1 << 15) | (vou_scale_h_fld[w_idx - 1] << 4);
496 if (h_idx)
497 vouvcr |= (1 << 14) | vou_scale_v_fld[h_idx - 1];
498
499 dev_dbg(vou_dev->v4l2_dev.dev, "%s: scaling 0x%x\n", fmt->desc, vouvcr);
500
501 /* To produce a colour bar for testing set bit 23 of VOUVCR */
502 sh_vou_reg_ab_write(vou_dev, VOUVCR, vouvcr);
503 sh_vou_reg_ab_write(vou_dev, VOUDFR,
504 fmt->pkf | (fmt->yf << 8) | (fmt->rgb << 16));
505 }
506
507 struct sh_vou_geometry {
508 struct v4l2_rect output;
509 unsigned int in_width;
510 unsigned int in_height;
511 int scale_idx_h;
512 int scale_idx_v;
513 };
514
515 /*
516 * Find input geometry, that we can use to produce output, closest to the
517 * requested rectangle, using VOU scaling
518 */
519 static void vou_adjust_input(struct sh_vou_geometry *geo, v4l2_std_id std)
520 {
521 /* The compiler cannot know, that best and idx will indeed be set */
522 unsigned int best_err = UINT_MAX, best = 0, img_height_max;
523 int i, idx = 0;
524
525 if (std & V4L2_STD_525_60)
526 img_height_max = 480;
527 else
528 img_height_max = 576;
529
530 /* Image width must be a multiple of 4 */
531 v4l_bound_align_image(&geo->in_width,
532 VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 2,
533 &geo->in_height,
534 VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
535
536 /* Select scales to come as close as possible to the output image */
537 for (i = ARRAY_SIZE(vou_scale_h_num) - 1; i >= 0; i--) {
538 unsigned int err;
539 unsigned int found = geo->output.width * vou_scale_h_den[i] /
540 vou_scale_h_num[i];
541
542 if (found > VOU_MAX_IMAGE_WIDTH)
543 /* scales increase */
544 break;
545
546 err = abs(found - geo->in_width);
547 if (err < best_err) {
548 best_err = err;
549 idx = i;
550 best = found;
551 }
552 if (!err)
553 break;
554 }
555
556 geo->in_width = best;
557 geo->scale_idx_h = idx;
558
559 best_err = UINT_MAX;
560
561 /* This loop can be replaced with one division */
562 for (i = ARRAY_SIZE(vou_scale_v_num) - 1; i >= 0; i--) {
563 unsigned int err;
564 unsigned int found = geo->output.height * vou_scale_v_den[i] /
565 vou_scale_v_num[i];
566
567 if (found > img_height_max)
568 /* scales increase */
569 break;
570
571 err = abs(found - geo->in_height);
572 if (err < best_err) {
573 best_err = err;
574 idx = i;
575 best = found;
576 }
577 if (!err)
578 break;
579 }
580
581 geo->in_height = best;
582 geo->scale_idx_v = idx;
583 }
584
585 /*
586 * Find output geometry, that we can produce, using VOU scaling, closest to
587 * the requested rectangle
588 */
589 static void vou_adjust_output(struct sh_vou_geometry *geo, v4l2_std_id std)
590 {
591 unsigned int best_err = UINT_MAX, best = geo->in_width,
592 width_max, height_max, img_height_max;
593 int i, idx_h = 0, idx_v = 0;
594
595 if (std & V4L2_STD_525_60) {
596 width_max = 858;
597 height_max = 262 * 2;
598 img_height_max = 480;
599 } else {
600 width_max = 864;
601 height_max = 312 * 2;
602 img_height_max = 576;
603 }
604
605 /* Select scales to come as close as possible to the output image */
606 for (i = 0; i < ARRAY_SIZE(vou_scale_h_num); i++) {
607 unsigned int err;
608 unsigned int found = geo->in_width * vou_scale_h_num[i] /
609 vou_scale_h_den[i];
610
611 if (found > VOU_MAX_IMAGE_WIDTH)
612 /* scales increase */
613 break;
614
615 err = abs(found - geo->output.width);
616 if (err < best_err) {
617 best_err = err;
618 idx_h = i;
619 best = found;
620 }
621 if (!err)
622 break;
623 }
624
625 geo->output.width = best;
626 geo->scale_idx_h = idx_h;
627 if (geo->output.left + best > width_max)
628 geo->output.left = width_max - best;
629
630 pr_debug("%s(): W %u * %u/%u = %u\n", __func__, geo->in_width,
631 vou_scale_h_num[idx_h], vou_scale_h_den[idx_h], best);
632
633 best_err = UINT_MAX;
634
635 /* This loop can be replaced with one division */
636 for (i = 0; i < ARRAY_SIZE(vou_scale_v_num); i++) {
637 unsigned int err;
638 unsigned int found = geo->in_height * vou_scale_v_num[i] /
639 vou_scale_v_den[i];
640
641 if (found > img_height_max)
642 /* scales increase */
643 break;
644
645 err = abs(found - geo->output.height);
646 if (err < best_err) {
647 best_err = err;
648 idx_v = i;
649 best = found;
650 }
651 if (!err)
652 break;
653 }
654
655 geo->output.height = best;
656 geo->scale_idx_v = idx_v;
657 if (geo->output.top + best > height_max)
658 geo->output.top = height_max - best;
659
660 pr_debug("%s(): H %u * %u/%u = %u\n", __func__, geo->in_height,
661 vou_scale_v_num[idx_v], vou_scale_v_den[idx_v], best);
662 }
663
664 static int sh_vou_try_fmt_vid_out(struct file *file, void *priv,
665 struct v4l2_format *fmt)
666 {
667 struct sh_vou_device *vou_dev = video_drvdata(file);
668 struct v4l2_pix_format *pix = &fmt->fmt.pix;
669 unsigned int img_height_max;
670 int pix_idx;
671
672 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
673
674 pix->field = V4L2_FIELD_INTERLACED;
675 pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
676 pix->ycbcr_enc = pix->quantization = 0;
677
678 for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
679 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
680 break;
681
682 if (pix_idx == ARRAY_SIZE(vou_fmt))
683 return -EINVAL;
684
685 if (vou_dev->std & V4L2_STD_525_60)
686 img_height_max = 480;
687 else
688 img_height_max = 576;
689
690 v4l_bound_align_image(&pix->width,
691 VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 2,
692 &pix->height,
693 VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
694 pix->bytesperline = pix->width * vou_fmt[pix_idx].bpl;
695 pix->sizeimage = pix->height * ((pix->width * vou_fmt[pix_idx].bpp) >> 3);
696
697 return 0;
698 }
699
700 static int sh_vou_set_fmt_vid_out(struct sh_vou_device *vou_dev,
701 struct v4l2_pix_format *pix)
702 {
703 unsigned int img_height_max;
704 struct sh_vou_geometry geo;
705 struct v4l2_subdev_format format = {
706 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
707 /* Revisit: is this the correct code? */
708 .format.code = MEDIA_BUS_FMT_YUYV8_2X8,
709 .format.field = V4L2_FIELD_INTERLACED,
710 .format.colorspace = V4L2_COLORSPACE_SMPTE170M,
711 };
712 struct v4l2_mbus_framefmt *mbfmt = &format.format;
713 int pix_idx;
714 int ret;
715
716 if (vb2_is_busy(&vou_dev->queue))
717 return -EBUSY;
718
719 for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
720 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
721 break;
722
723 geo.in_width = pix->width;
724 geo.in_height = pix->height;
725 geo.output = vou_dev->rect;
726
727 vou_adjust_output(&geo, vou_dev->std);
728
729 mbfmt->width = geo.output.width;
730 mbfmt->height = geo.output.height;
731 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
732 set_fmt, NULL, &format);
733 /* Must be implemented, so, don't check for -ENOIOCTLCMD */
734 if (ret < 0)
735 return ret;
736
737 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
738 geo.output.width, geo.output.height, mbfmt->width, mbfmt->height);
739
740 if (vou_dev->std & V4L2_STD_525_60)
741 img_height_max = 480;
742 else
743 img_height_max = 576;
744
745 /* Sanity checks */
746 if ((unsigned)mbfmt->width > VOU_MAX_IMAGE_WIDTH ||
747 (unsigned)mbfmt->height > img_height_max ||
748 mbfmt->code != MEDIA_BUS_FMT_YUYV8_2X8)
749 return -EIO;
750
751 if (mbfmt->width != geo.output.width ||
752 mbfmt->height != geo.output.height) {
753 geo.output.width = mbfmt->width;
754 geo.output.height = mbfmt->height;
755
756 vou_adjust_input(&geo, vou_dev->std);
757 }
758
759 /* We tried to preserve output rectangle, but it could have changed */
760 vou_dev->rect = geo.output;
761 pix->width = geo.in_width;
762 pix->height = geo.in_height;
763
764 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u\n", __func__,
765 pix->width, pix->height);
766
767 vou_dev->pix_idx = pix_idx;
768
769 vou_dev->pix = *pix;
770
771 sh_vou_configure_geometry(vou_dev, pix_idx,
772 geo.scale_idx_h, geo.scale_idx_v);
773
774 return 0;
775 }
776
777 static int sh_vou_s_fmt_vid_out(struct file *file, void *priv,
778 struct v4l2_format *fmt)
779 {
780 struct sh_vou_device *vou_dev = video_drvdata(file);
781 int ret = sh_vou_try_fmt_vid_out(file, priv, fmt);
782
783 if (ret)
784 return ret;
785 return sh_vou_set_fmt_vid_out(vou_dev, &fmt->fmt.pix);
786 }
787
788 static int sh_vou_enum_output(struct file *file, void *fh,
789 struct v4l2_output *a)
790 {
791 struct sh_vou_device *vou_dev = video_drvdata(file);
792
793 if (a->index)
794 return -EINVAL;
795 strlcpy(a->name, "Video Out", sizeof(a->name));
796 a->type = V4L2_OUTPUT_TYPE_ANALOG;
797 a->std = vou_dev->vdev.tvnorms;
798 return 0;
799 }
800
801 static int sh_vou_g_output(struct file *file, void *fh, unsigned int *i)
802 {
803 *i = 0;
804 return 0;
805 }
806
807 static int sh_vou_s_output(struct file *file, void *fh, unsigned int i)
808 {
809 return i ? -EINVAL : 0;
810 }
811
812 static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)
813 {
814 switch (bus_fmt) {
815 default:
816 pr_warning("%s(): Invalid bus-format code %d, using default 8-bit\n",
817 __func__, bus_fmt);
818 case SH_VOU_BUS_8BIT:
819 return 1;
820 case SH_VOU_BUS_16BIT:
821 return 0;
822 case SH_VOU_BUS_BT656:
823 return 3;
824 }
825 }
826
827 static int sh_vou_s_std(struct file *file, void *priv, v4l2_std_id std_id)
828 {
829 struct sh_vou_device *vou_dev = video_drvdata(file);
830 int ret;
831
832 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): 0x%llx\n", __func__, std_id);
833
834 if (std_id == vou_dev->std)
835 return 0;
836
837 if (vb2_is_busy(&vou_dev->queue))
838 return -EBUSY;
839
840 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
841 s_std_output, std_id);
842 /* Shall we continue, if the subdev doesn't support .s_std_output()? */
843 if (ret < 0 && ret != -ENOIOCTLCMD)
844 return ret;
845
846 vou_dev->rect.top = vou_dev->rect.left = 0;
847 vou_dev->rect.width = VOU_MAX_IMAGE_WIDTH;
848 if (std_id & V4L2_STD_525_60) {
849 sh_vou_reg_ab_set(vou_dev, VOUCR,
850 sh_vou_ntsc_mode(vou_dev->pdata->bus_fmt) << 29, 7 << 29);
851 vou_dev->rect.height = 480;
852 } else {
853 sh_vou_reg_ab_set(vou_dev, VOUCR, 5 << 29, 7 << 29);
854 vou_dev->rect.height = 576;
855 }
856
857 vou_dev->pix.width = vou_dev->rect.width;
858 vou_dev->pix.height = vou_dev->rect.height;
859 vou_dev->pix.bytesperline =
860 vou_dev->pix.width * vou_fmt[vou_dev->pix_idx].bpl;
861 vou_dev->pix.sizeimage = vou_dev->pix.height *
862 ((vou_dev->pix.width * vou_fmt[vou_dev->pix_idx].bpp) >> 3);
863 vou_dev->std = std_id;
864 sh_vou_set_fmt_vid_out(vou_dev, &vou_dev->pix);
865
866 return 0;
867 }
868
869 static int sh_vou_g_std(struct file *file, void *priv, v4l2_std_id *std)
870 {
871 struct sh_vou_device *vou_dev = video_drvdata(file);
872
873 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
874
875 *std = vou_dev->std;
876
877 return 0;
878 }
879
880 static int sh_vou_log_status(struct file *file, void *priv)
881 {
882 struct sh_vou_device *vou_dev = video_drvdata(file);
883
884 pr_info("VOUER: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUER));
885 pr_info("VOUCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUCR));
886 pr_info("VOUSTR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSTR));
887 pr_info("VOUVCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUVCR));
888 pr_info("VOUISR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUISR));
889 pr_info("VOUBCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUBCR));
890 pr_info("VOUDPR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDPR));
891 pr_info("VOUDSR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDSR));
892 pr_info("VOUVPR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUVPR));
893 pr_info("VOUIR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUIR));
894 pr_info("VOUSRR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSRR));
895 pr_info("VOUMSR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUMSR));
896 pr_info("VOUHIR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUHIR));
897 pr_info("VOUDFR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDFR));
898 pr_info("VOUAD1R: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAD1R));
899 pr_info("VOUAD2R: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAD2R));
900 pr_info("VOUAIR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAIR));
901 pr_info("VOUSWR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSWR));
902 pr_info("VOURCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOURCR));
903 pr_info("VOURPR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOURPR));
904 return 0;
905 }
906
907 static int sh_vou_g_selection(struct file *file, void *fh,
908 struct v4l2_selection *sel)
909 {
910 struct sh_vou_device *vou_dev = video_drvdata(file);
911
912 if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
913 return -EINVAL;
914 switch (sel->target) {
915 case V4L2_SEL_TGT_COMPOSE:
916 sel->r = vou_dev->rect;
917 break;
918 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
919 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
920 sel->r.left = 0;
921 sel->r.top = 0;
922 sel->r.width = VOU_MAX_IMAGE_WIDTH;
923 if (vou_dev->std & V4L2_STD_525_60)
924 sel->r.height = 480;
925 else
926 sel->r.height = 576;
927 break;
928 default:
929 return -EINVAL;
930 }
931 return 0;
932 }
933
934 /* Assume a dull encoder, do all the work ourselves. */
935 static int sh_vou_s_selection(struct file *file, void *fh,
936 struct v4l2_selection *sel)
937 {
938 struct v4l2_rect *rect = &sel->r;
939 struct sh_vou_device *vou_dev = video_drvdata(file);
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_subdev_format format = {
944 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
945 /* Revisit: is this the correct code? */
946 .format.code = MEDIA_BUS_FMT_YUYV8_2X8,
947 .format.field = V4L2_FIELD_INTERLACED,
948 .format.colorspace = V4L2_COLORSPACE_SMPTE170M,
949 };
950 unsigned int img_height_max;
951 int ret;
952
953 if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
954 sel->target != V4L2_SEL_TGT_COMPOSE)
955 return -EINVAL;
956
957 if (vb2_is_busy(&vou_dev->queue))
958 return -EBUSY;
959
960 if (vou_dev->std & V4L2_STD_525_60)
961 img_height_max = 480;
962 else
963 img_height_max = 576;
964
965 v4l_bound_align_image(&rect->width,
966 VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 1,
967 &rect->height,
968 VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
969
970 if (rect->width + rect->left > VOU_MAX_IMAGE_WIDTH)
971 rect->left = VOU_MAX_IMAGE_WIDTH - rect->width;
972
973 if (rect->height + rect->top > img_height_max)
974 rect->top = img_height_max - rect->height;
975
976 geo.output = *rect;
977 geo.in_width = pix->width;
978 geo.in_height = pix->height;
979
980 /* Configure the encoder one-to-one, position at 0, ignore errors */
981 sd_crop.c.width = geo.output.width;
982 sd_crop.c.height = geo.output.height;
983 /*
984 * We first issue a S_CROP, so that the subsequent S_FMT delivers the
985 * final encoder configuration.
986 */
987 v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
988 s_crop, &sd_crop);
989 format.format.width = geo.output.width;
990 format.format.height = geo.output.height;
991 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
992 set_fmt, NULL, &format);
993 /* Must be implemented, so, don't check for -ENOIOCTLCMD */
994 if (ret < 0)
995 return ret;
996
997 /* Sanity checks */
998 if ((unsigned)format.format.width > VOU_MAX_IMAGE_WIDTH ||
999 (unsigned)format.format.height > img_height_max ||
1000 format.format.code != MEDIA_BUS_FMT_YUYV8_2X8)
1001 return -EIO;
1002
1003 geo.output.width = format.format.width;
1004 geo.output.height = format.format.height;
1005
1006 /*
1007 * No down-scaling. According to the API, current call has precedence:
1008 * http://v4l2spec.bytesex.org/spec/x1904.htm#AEN1954 paragraph two.
1009 */
1010 vou_adjust_input(&geo, vou_dev->std);
1011
1012 /* We tried to preserve output rectangle, but it could have changed */
1013 vou_dev->rect = geo.output;
1014 pix->width = geo.in_width;
1015 pix->height = geo.in_height;
1016
1017 sh_vou_configure_geometry(vou_dev, vou_dev->pix_idx,
1018 geo.scale_idx_h, geo.scale_idx_v);
1019
1020 return 0;
1021 }
1022
1023 static irqreturn_t sh_vou_isr(int irq, void *dev_id)
1024 {
1025 struct sh_vou_device *vou_dev = dev_id;
1026 static unsigned long j;
1027 struct sh_vou_buffer *vb;
1028 static int cnt;
1029 u32 irq_status = sh_vou_reg_a_read(vou_dev, VOUIR), masked;
1030 u32 vou_status = sh_vou_reg_a_read(vou_dev, VOUSTR);
1031
1032 if (!(irq_status & 0x300)) {
1033 if (printk_timed_ratelimit(&j, 500))
1034 dev_warn(vou_dev->v4l2_dev.dev, "IRQ status 0x%x!\n",
1035 irq_status);
1036 return IRQ_NONE;
1037 }
1038
1039 spin_lock(&vou_dev->lock);
1040 if (!vou_dev->active || list_empty(&vou_dev->buf_list)) {
1041 if (printk_timed_ratelimit(&j, 500))
1042 dev_warn(vou_dev->v4l2_dev.dev,
1043 "IRQ without active buffer: %x!\n", irq_status);
1044 /* Just ack: buf_release will disable further interrupts */
1045 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x300);
1046 spin_unlock(&vou_dev->lock);
1047 return IRQ_HANDLED;
1048 }
1049
1050 masked = ~(0x300 & irq_status) & irq_status & 0x30304;
1051 dev_dbg(vou_dev->v4l2_dev.dev,
1052 "IRQ status 0x%x -> 0x%x, VOU status 0x%x, cnt %d\n",
1053 irq_status, masked, vou_status, cnt);
1054
1055 cnt++;
1056 /* side = vou_status & 0x10000; */
1057
1058 /* Clear only set interrupts */
1059 sh_vou_reg_a_write(vou_dev, VOUIR, masked);
1060
1061 vb = vou_dev->active;
1062 if (list_is_singular(&vb->list)) {
1063 /* Keep cycling while no next buffer is available */
1064 sh_vou_schedule_next(vou_dev, &vb->vb);
1065 spin_unlock(&vou_dev->lock);
1066 return IRQ_HANDLED;
1067 }
1068
1069 list_del(&vb->list);
1070
1071 vb->vb.vb2_buf.timestamp = ktime_get_ns();
1072 vb->vb.sequence = vou_dev->sequence++;
1073 vb->vb.field = V4L2_FIELD_INTERLACED;
1074 vb2_buffer_done(&vb->vb.vb2_buf, VB2_BUF_STATE_DONE);
1075
1076 vou_dev->active = list_entry(vou_dev->buf_list.next,
1077 struct sh_vou_buffer, list);
1078
1079 if (list_is_singular(&vou_dev->buf_list)) {
1080 /* Keep cycling while no next buffer is available */
1081 sh_vou_schedule_next(vou_dev, &vou_dev->active->vb);
1082 } else {
1083 struct sh_vou_buffer *new = list_entry(vou_dev->active->list.next,
1084 struct sh_vou_buffer, list);
1085 sh_vou_schedule_next(vou_dev, &new->vb);
1086 }
1087
1088 spin_unlock(&vou_dev->lock);
1089
1090 return IRQ_HANDLED;
1091 }
1092
1093 static int sh_vou_hw_init(struct sh_vou_device *vou_dev)
1094 {
1095 struct sh_vou_pdata *pdata = vou_dev->pdata;
1096 u32 voucr = sh_vou_ntsc_mode(pdata->bus_fmt) << 29;
1097 int i = 100;
1098
1099 /* Disable all IRQs */
1100 sh_vou_reg_a_write(vou_dev, VOUIR, 0);
1101
1102 /* Reset VOU interfaces - registers unaffected */
1103 sh_vou_reg_a_write(vou_dev, VOUSRR, 0x101);
1104 while (--i && (sh_vou_reg_a_read(vou_dev, VOUSRR) & 0x101))
1105 udelay(1);
1106
1107 if (!i)
1108 return -ETIMEDOUT;
1109
1110 dev_dbg(vou_dev->v4l2_dev.dev, "Reset took %dus\n", 100 - i);
1111
1112 if (pdata->flags & SH_VOU_PCLK_FALLING)
1113 voucr |= 1 << 28;
1114 if (pdata->flags & SH_VOU_HSYNC_LOW)
1115 voucr |= 1 << 27;
1116 if (pdata->flags & SH_VOU_VSYNC_LOW)
1117 voucr |= 1 << 26;
1118 sh_vou_reg_ab_set(vou_dev, VOUCR, voucr, 0xfc000000);
1119
1120 /* Manual register side switching at first */
1121 sh_vou_reg_a_write(vou_dev, VOURCR, 4);
1122 /* Default - fixed HSYNC length, can be made configurable is required */
1123 sh_vou_reg_ab_write(vou_dev, VOUMSR, 0x800000);
1124
1125 sh_vou_set_fmt_vid_out(vou_dev, &vou_dev->pix);
1126
1127 return 0;
1128 }
1129
1130 /* File operations */
1131 static int sh_vou_open(struct file *file)
1132 {
1133 struct sh_vou_device *vou_dev = video_drvdata(file);
1134 int err;
1135
1136 if (mutex_lock_interruptible(&vou_dev->fop_lock))
1137 return -ERESTARTSYS;
1138
1139 err = v4l2_fh_open(file);
1140 if (err)
1141 goto done_open;
1142 if (v4l2_fh_is_singular_file(file) &&
1143 vou_dev->status == SH_VOU_INITIALISING) {
1144 /* First open */
1145 pm_runtime_get_sync(vou_dev->v4l2_dev.dev);
1146 err = sh_vou_hw_init(vou_dev);
1147 if (err < 0) {
1148 pm_runtime_put(vou_dev->v4l2_dev.dev);
1149 v4l2_fh_release(file);
1150 } else {
1151 vou_dev->status = SH_VOU_IDLE;
1152 }
1153 }
1154 done_open:
1155 mutex_unlock(&vou_dev->fop_lock);
1156 return err;
1157 }
1158
1159 static int sh_vou_release(struct file *file)
1160 {
1161 struct sh_vou_device *vou_dev = video_drvdata(file);
1162 bool is_last;
1163
1164 mutex_lock(&vou_dev->fop_lock);
1165 is_last = v4l2_fh_is_singular_file(file);
1166 _vb2_fop_release(file, NULL);
1167 if (is_last) {
1168 /* Last close */
1169 vou_dev->status = SH_VOU_INITIALISING;
1170 sh_vou_reg_a_set(vou_dev, VOUER, 0, 0x101);
1171 pm_runtime_put(vou_dev->v4l2_dev.dev);
1172 }
1173 mutex_unlock(&vou_dev->fop_lock);
1174 return 0;
1175 }
1176
1177 /* sh_vou display ioctl operations */
1178 static const struct v4l2_ioctl_ops sh_vou_ioctl_ops = {
1179 .vidioc_querycap = sh_vou_querycap,
1180 .vidioc_enum_fmt_vid_out = sh_vou_enum_fmt_vid_out,
1181 .vidioc_g_fmt_vid_out = sh_vou_g_fmt_vid_out,
1182 .vidioc_s_fmt_vid_out = sh_vou_s_fmt_vid_out,
1183 .vidioc_try_fmt_vid_out = sh_vou_try_fmt_vid_out,
1184 .vidioc_reqbufs = vb2_ioctl_reqbufs,
1185 .vidioc_create_bufs = vb2_ioctl_create_bufs,
1186 .vidioc_querybuf = vb2_ioctl_querybuf,
1187 .vidioc_qbuf = vb2_ioctl_qbuf,
1188 .vidioc_dqbuf = vb2_ioctl_dqbuf,
1189 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
1190 .vidioc_streamon = vb2_ioctl_streamon,
1191 .vidioc_streamoff = vb2_ioctl_streamoff,
1192 .vidioc_expbuf = vb2_ioctl_expbuf,
1193 .vidioc_g_output = sh_vou_g_output,
1194 .vidioc_s_output = sh_vou_s_output,
1195 .vidioc_enum_output = sh_vou_enum_output,
1196 .vidioc_s_std = sh_vou_s_std,
1197 .vidioc_g_std = sh_vou_g_std,
1198 .vidioc_g_selection = sh_vou_g_selection,
1199 .vidioc_s_selection = sh_vou_s_selection,
1200 .vidioc_log_status = sh_vou_log_status,
1201 };
1202
1203 static const struct v4l2_file_operations sh_vou_fops = {
1204 .owner = THIS_MODULE,
1205 .open = sh_vou_open,
1206 .release = sh_vou_release,
1207 .unlocked_ioctl = video_ioctl2,
1208 .mmap = vb2_fop_mmap,
1209 .poll = vb2_fop_poll,
1210 .write = vb2_fop_write,
1211 };
1212
1213 static const struct video_device sh_vou_video_template = {
1214 .name = "sh_vou",
1215 .fops = &sh_vou_fops,
1216 .ioctl_ops = &sh_vou_ioctl_ops,
1217 .tvnorms = V4L2_STD_525_60, /* PAL only supported in 8-bit non-bt656 mode */
1218 .vfl_dir = VFL_DIR_TX,
1219 };
1220
1221 static int sh_vou_probe(struct platform_device *pdev)
1222 {
1223 struct sh_vou_pdata *vou_pdata = pdev->dev.platform_data;
1224 struct v4l2_rect *rect;
1225 struct v4l2_pix_format *pix;
1226 struct i2c_adapter *i2c_adap;
1227 struct video_device *vdev;
1228 struct sh_vou_device *vou_dev;
1229 struct resource *reg_res;
1230 struct v4l2_subdev *subdev;
1231 struct vb2_queue *q;
1232 int irq, ret;
1233
1234 reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1235 irq = platform_get_irq(pdev, 0);
1236
1237 if (!vou_pdata || !reg_res || irq <= 0) {
1238 dev_err(&pdev->dev, "Insufficient VOU platform information.\n");
1239 return -ENODEV;
1240 }
1241
1242 vou_dev = devm_kzalloc(&pdev->dev, sizeof(*vou_dev), GFP_KERNEL);
1243 if (!vou_dev)
1244 return -ENOMEM;
1245
1246 INIT_LIST_HEAD(&vou_dev->buf_list);
1247 spin_lock_init(&vou_dev->lock);
1248 mutex_init(&vou_dev->fop_lock);
1249 vou_dev->pdata = vou_pdata;
1250 vou_dev->status = SH_VOU_INITIALISING;
1251 vou_dev->pix_idx = 1;
1252
1253 rect = &vou_dev->rect;
1254 pix = &vou_dev->pix;
1255
1256 /* Fill in defaults */
1257 vou_dev->std = V4L2_STD_NTSC_M;
1258 rect->left = 0;
1259 rect->top = 0;
1260 rect->width = VOU_MAX_IMAGE_WIDTH;
1261 rect->height = 480;
1262 pix->width = VOU_MAX_IMAGE_WIDTH;
1263 pix->height = 480;
1264 pix->pixelformat = V4L2_PIX_FMT_NV16;
1265 pix->field = V4L2_FIELD_INTERLACED;
1266 pix->bytesperline = VOU_MAX_IMAGE_WIDTH;
1267 pix->sizeimage = VOU_MAX_IMAGE_WIDTH * 2 * 480;
1268 pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
1269
1270 vou_dev->base = devm_ioremap_resource(&pdev->dev, reg_res);
1271 if (IS_ERR(vou_dev->base))
1272 return PTR_ERR(vou_dev->base);
1273
1274 ret = devm_request_irq(&pdev->dev, irq, sh_vou_isr, 0, "vou", vou_dev);
1275 if (ret < 0)
1276 return ret;
1277
1278 ret = v4l2_device_register(&pdev->dev, &vou_dev->v4l2_dev);
1279 if (ret < 0) {
1280 dev_err(&pdev->dev, "Error registering v4l2 device\n");
1281 return ret;
1282 }
1283
1284 vdev = &vou_dev->vdev;
1285 *vdev = sh_vou_video_template;
1286 if (vou_pdata->bus_fmt == SH_VOU_BUS_8BIT)
1287 vdev->tvnorms |= V4L2_STD_PAL;
1288 vdev->v4l2_dev = &vou_dev->v4l2_dev;
1289 vdev->release = video_device_release_empty;
1290 vdev->lock = &vou_dev->fop_lock;
1291
1292 video_set_drvdata(vdev, vou_dev);
1293
1294 /* Initialize the vb2 queue */
1295 q = &vou_dev->queue;
1296 q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1297 q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_WRITE;
1298 q->drv_priv = vou_dev;
1299 q->buf_struct_size = sizeof(struct sh_vou_buffer);
1300 q->ops = &sh_vou_qops;
1301 q->mem_ops = &vb2_dma_contig_memops;
1302 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1303 q->min_buffers_needed = 2;
1304 q->lock = &vou_dev->fop_lock;
1305 q->dev = &pdev->dev;
1306 ret = vb2_queue_init(q);
1307 if (ret)
1308 goto ei2cgadap;
1309
1310 vdev->queue = q;
1311 INIT_LIST_HEAD(&vou_dev->buf_list);
1312
1313 pm_runtime_enable(&pdev->dev);
1314 pm_runtime_resume(&pdev->dev);
1315
1316 i2c_adap = i2c_get_adapter(vou_pdata->i2c_adap);
1317 if (!i2c_adap) {
1318 ret = -ENODEV;
1319 goto ei2cgadap;
1320 }
1321
1322 ret = sh_vou_hw_init(vou_dev);
1323 if (ret < 0)
1324 goto ereset;
1325
1326 subdev = v4l2_i2c_new_subdev_board(&vou_dev->v4l2_dev, i2c_adap,
1327 vou_pdata->board_info, NULL);
1328 if (!subdev) {
1329 ret = -ENOMEM;
1330 goto ei2cnd;
1331 }
1332
1333 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1334 if (ret < 0)
1335 goto evregdev;
1336
1337 return 0;
1338
1339 evregdev:
1340 ei2cnd:
1341 ereset:
1342 i2c_put_adapter(i2c_adap);
1343 ei2cgadap:
1344 pm_runtime_disable(&pdev->dev);
1345 v4l2_device_unregister(&vou_dev->v4l2_dev);
1346 return ret;
1347 }
1348
1349 static int sh_vou_remove(struct platform_device *pdev)
1350 {
1351 struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1352 struct sh_vou_device *vou_dev = container_of(v4l2_dev,
1353 struct sh_vou_device, v4l2_dev);
1354 struct v4l2_subdev *sd = list_entry(v4l2_dev->subdevs.next,
1355 struct v4l2_subdev, list);
1356 struct i2c_client *client = v4l2_get_subdevdata(sd);
1357
1358 pm_runtime_disable(&pdev->dev);
1359 video_unregister_device(&vou_dev->vdev);
1360 i2c_put_adapter(client->adapter);
1361 v4l2_device_unregister(&vou_dev->v4l2_dev);
1362 return 0;
1363 }
1364
1365 static struct platform_driver __refdata sh_vou = {
1366 .remove = sh_vou_remove,
1367 .driver = {
1368 .name = "sh-vou",
1369 },
1370 };
1371
1372 module_platform_driver_probe(sh_vou, sh_vou_probe);
1373
1374 MODULE_DESCRIPTION("SuperH VOU driver");
1375 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1376 MODULE_LICENSE("GPL v2");
1377 MODULE_VERSION("0.1.0");
1378 MODULE_ALIAS("platform:sh-vou");
Linux kernel - Deliverables
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