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eCryptfs: Copy up lower inode attrs in getattr
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / media / video / sh_vou.c
blob07cf0c6c7c1f7a210c3a078fc580ee68845535c6
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/version.h>
23 #include <linux/videodev2.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 case V4L2_PIX_FMT_NV12:
211 case V4L2_PIX_FMT_NV16:
212 row_coeff = 1;
213 break;
214 case V4L2_PIX_FMT_RGB565:
215 dataswap ^= 1;
216 case V4L2_PIX_FMT_RGB565X:
217 row_coeff = 2;
218 break;
219 case V4L2_PIX_FMT_RGB24:
220 row_coeff = 3;
221 break;
222 }
223
224 sh_vou_reg_a_write(vou_dev, VOUSWR, dataswap);
225 sh_vou_reg_ab_write(vou_dev, VOUAIR, vou_dev->pix.width * row_coeff);
226 sh_vou_schedule_next(vou_dev, vb);
227 }
228
229 static void free_buffer(struct videobuf_queue *vq, struct videobuf_buffer *vb)
230 {
231 BUG_ON(in_interrupt());
232
233 /* Wait until this buffer is no longer in STATE_QUEUED or STATE_ACTIVE */
234 videobuf_waiton(vq, vb, 0, 0);
235 videobuf_dma_contig_free(vq, vb);
236 vb->state = VIDEOBUF_NEEDS_INIT;
237 }
238
239 /* Locking: caller holds fop_lock mutex */
240 static int sh_vou_buf_setup(struct videobuf_queue *vq, unsigned int *count,
241 unsigned int *size)
242 {
243 struct video_device *vdev = vq->priv_data;
244 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
245
246 *size = vou_fmt[vou_dev->pix_idx].bpp * vou_dev->pix.width *
247 vou_dev->pix.height / 8;
248
249 if (*count < 2)
250 *count = 2;
251
252 /* Taking into account maximum frame size, *count will stay >= 2 */
253 if (PAGE_ALIGN(*size) * *count > 4 * 1024 * 1024)
254 *count = 4 * 1024 * 1024 / PAGE_ALIGN(*size);
255
256 dev_dbg(vq->dev, "%s(): count=%d, size=%d\n", __func__, *count, *size);
257
258 return 0;
259 }
260
261 /* Locking: caller holds fop_lock mutex */
262 static int sh_vou_buf_prepare(struct videobuf_queue *vq,
263 struct videobuf_buffer *vb,
264 enum v4l2_field field)
265 {
266 struct video_device *vdev = vq->priv_data;
267 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
268 struct v4l2_pix_format *pix = &vou_dev->pix;
269 int bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
270 int ret;
271
272 dev_dbg(vq->dev, "%s()\n", __func__);
273
274 if (vb->width != pix->width ||
275 vb->height != pix->height ||
276 vb->field != pix->field) {
277 vb->width = pix->width;
278 vb->height = pix->height;
279 vb->field = field;
280 if (vb->state != VIDEOBUF_NEEDS_INIT)
281 free_buffer(vq, vb);
282 }
283
284 vb->size = vb->height * bytes_per_line;
285 if (vb->baddr && vb->bsize < vb->size) {
286 /* User buffer too small */
287 dev_warn(vq->dev, "User buffer too small: [%u] @ %lx\n",
288 vb->bsize, vb->baddr);
289 return -EINVAL;
290 }
291
292 if (vb->state == VIDEOBUF_NEEDS_INIT) {
293 ret = videobuf_iolock(vq, vb, NULL);
294 if (ret < 0) {
295 dev_warn(vq->dev, "IOLOCK buf-type %d: %d\n",
296 vb->memory, ret);
297 return ret;
298 }
299 vb->state = VIDEOBUF_PREPARED;
300 }
301
302 dev_dbg(vq->dev,
303 "%s(): fmt #%d, %u bytes per line, phys 0x%x, type %d, state %d\n",
304 __func__, vou_dev->pix_idx, bytes_per_line,
305 videobuf_to_dma_contig(vb), vb->memory, vb->state);
306
307 return 0;
308 }
309
310 /* Locking: caller holds fop_lock mutex and vq->irqlock spinlock */
311 static void sh_vou_buf_queue(struct videobuf_queue *vq,
312 struct videobuf_buffer *vb)
313 {
314 struct video_device *vdev = vq->priv_data;
315 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
316
317 dev_dbg(vq->dev, "%s()\n", __func__);
318
319 vb->state = VIDEOBUF_QUEUED;
320 list_add_tail(&vb->queue, &vou_dev->queue);
321
322 if (vou_dev->status == SH_VOU_RUNNING) {
323 return;
324 } else if (!vou_dev->active) {
325 vou_dev->active = vb;
326 /* Start from side A: we use mirror addresses, so, set B */
327 sh_vou_reg_a_write(vou_dev, VOURPR, 1);
328 dev_dbg(vq->dev, "%s: first buffer status 0x%x\n", __func__,
329 sh_vou_reg_a_read(vou_dev, VOUSTR));
330 sh_vou_schedule_next(vou_dev, vb);
331 /* Only activate VOU after the second buffer */
332 } else if (vou_dev->active->queue.next == &vb->queue) {
333 /* Second buffer - initialise register side B */
334 sh_vou_reg_a_write(vou_dev, VOURPR, 0);
335 sh_vou_stream_start(vou_dev, vb);
336
337 /* Register side switching with frame VSYNC */
338 sh_vou_reg_a_write(vou_dev, VOURCR, 5);
339 dev_dbg(vq->dev, "%s: second buffer status 0x%x\n", __func__,
340 sh_vou_reg_a_read(vou_dev, VOUSTR));
341
342 /* Enable End-of-Frame (VSYNC) interrupts */
343 sh_vou_reg_a_write(vou_dev, VOUIR, 0x10004);
344 /* Two buffers on the queue - activate the hardware */
345
346 vou_dev->status = SH_VOU_RUNNING;
347 sh_vou_reg_a_write(vou_dev, VOUER, 0x107);
348 }
349 }
350
351 static void sh_vou_buf_release(struct videobuf_queue *vq,
352 struct videobuf_buffer *vb)
353 {
354 struct video_device *vdev = vq->priv_data;
355 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
356 unsigned long flags;
357
358 dev_dbg(vq->dev, "%s()\n", __func__);
359
360 spin_lock_irqsave(&vou_dev->lock, flags);
361
362 if (vou_dev->active == vb) {
363 /* disable output */
364 sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
365 /* ...but the current frame will complete */
366 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
367 vou_dev->active = NULL;
368 }
369
370 if ((vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED)) {
371 vb->state = VIDEOBUF_ERROR;
372 list_del(&vb->queue);
373 }
374
375 spin_unlock_irqrestore(&vou_dev->lock, flags);
376
377 free_buffer(vq, vb);
378 }
379
380 static struct videobuf_queue_ops sh_vou_video_qops = {
381 .buf_setup = sh_vou_buf_setup,
382 .buf_prepare = sh_vou_buf_prepare,
383 .buf_queue = sh_vou_buf_queue,
384 .buf_release = sh_vou_buf_release,
385 };
386
387 /* Video IOCTLs */
388 static int sh_vou_querycap(struct file *file, void *priv,
389 struct v4l2_capability *cap)
390 {
391 struct sh_vou_file *vou_file = priv;
392
393 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
394
395 strlcpy(cap->card, "SuperH VOU", sizeof(cap->card));
396 cap->version = KERNEL_VERSION(0, 1, 0);
397 cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
398 return 0;
399 }
400
401 /* Enumerate formats, that the device can accept from the user */
402 static int sh_vou_enum_fmt_vid_out(struct file *file, void *priv,
403 struct v4l2_fmtdesc *fmt)
404 {
405 struct sh_vou_file *vou_file = priv;
406
407 if (fmt->index >= ARRAY_SIZE(vou_fmt))
408 return -EINVAL;
409
410 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
411
412 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
413 strlcpy(fmt->description, vou_fmt[fmt->index].desc,
414 sizeof(fmt->description));
415 fmt->pixelformat = vou_fmt[fmt->index].pfmt;
416
417 return 0;
418 }
419
420 static int sh_vou_g_fmt_vid_out(struct file *file, void *priv,
421 struct v4l2_format *fmt)
422 {
423 struct video_device *vdev = video_devdata(file);
424 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
425
426 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
427
428 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
429 fmt->fmt.pix = vou_dev->pix;
430
431 return 0;
432 }
433
434 static const unsigned char vou_scale_h_num[] = {1, 9, 2, 9, 4};
435 static const unsigned char vou_scale_h_den[] = {1, 8, 1, 4, 1};
436 static const unsigned char vou_scale_h_fld[] = {0, 2, 1, 3};
437 static const unsigned char vou_scale_v_num[] = {1, 2, 4};
438 static const unsigned char vou_scale_v_den[] = {1, 1, 1};
439 static const unsigned char vou_scale_v_fld[] = {0, 1};
440
441 static void sh_vou_configure_geometry(struct sh_vou_device *vou_dev,
442 int pix_idx, int w_idx, int h_idx)
443 {
444 struct sh_vou_fmt *fmt = vou_fmt + pix_idx;
445 unsigned int black_left, black_top, width_max, height_max,
446 frame_in_height, frame_out_height, frame_out_top;
447 struct v4l2_rect *rect = &vou_dev->rect;
448 struct v4l2_pix_format *pix = &vou_dev->pix;
449 u32 vouvcr = 0, dsr_h, dsr_v;
450
451 if (vou_dev->std & V4L2_STD_525_60) {
452 width_max = 858;
453 height_max = 262;
454 } else {
455 width_max = 864;
456 height_max = 312;
457 }
458
459 frame_in_height = pix->height / 2;
460 frame_out_height = rect->height / 2;
461 frame_out_top = rect->top / 2;
462
463 /*
464 * Cropping scheme: max useful image is 720x480, and the total video
465 * area is 858x525 (NTSC) or 864x625 (PAL). AK8813 / 8814 starts
466 * sampling data beginning with fixed 276th (NTSC) / 288th (PAL) clock,
467 * of which the first 33 / 25 clocks HSYNC must be held active. This
468 * has to be configured in CR[HW]. 1 pixel equals 2 clock periods.
469 * This gives CR[HW] = 16 / 12, VPR[HVP] = 138 / 144, which gives
470 * exactly 858 - 138 = 864 - 144 = 720! We call the out-of-display area,
471 * beyond DSR, specified on the left and top by the VPR register "black
472 * pixels" and out-of-image area (DPR) "background pixels." We fix VPR
473 * at 138 / 144 : 20, because that's the HSYNC timing, that our first
474 * client requires, and that's exactly what leaves us 720 pixels for the
475 * image; we leave VPR[VVP] at default 20 for now, because the client
476 * doesn't seem to have any special requirements for it. Otherwise we
477 * could also set it to max - 240 = 22 / 72. Thus VPR depends only on
478 * the selected standard, and DPR and DSR are selected according to
479 * cropping. Q: how does the client detect the first valid line? Does
480 * HSYNC stay inactive during invalid (black) lines?
481 */
482 black_left = width_max - VOU_MAX_IMAGE_WIDTH;
483 black_top = 20;
484
485 dsr_h = rect->width + rect->left;
486 dsr_v = frame_out_height + frame_out_top;
487
488 dev_dbg(vou_dev->v4l2_dev.dev,
489 "image %ux%u, black %u:%u, offset %u:%u, display %ux%u\n",
490 pix->width, frame_in_height, black_left, black_top,
491 rect->left, frame_out_top, dsr_h, dsr_v);
492
493 /* VOUISR height - half of a frame height in frame mode */
494 sh_vou_reg_ab_write(vou_dev, VOUISR, (pix->width << 16) | frame_in_height);
495 sh_vou_reg_ab_write(vou_dev, VOUVPR, (black_left << 16) | black_top);
496 sh_vou_reg_ab_write(vou_dev, VOUDPR, (rect->left << 16) | frame_out_top);
497 sh_vou_reg_ab_write(vou_dev, VOUDSR, (dsr_h << 16) | dsr_v);
498
499 /*
500 * if necessary, we could set VOUHIR to
501 * max(black_left + dsr_h, width_max) here
502 */
503
504 if (w_idx)
505 vouvcr |= (1 << 15) | (vou_scale_h_fld[w_idx - 1] << 4);
506 if (h_idx)
507 vouvcr |= (1 << 14) | vou_scale_v_fld[h_idx - 1];
508
509 dev_dbg(vou_dev->v4l2_dev.dev, "%s: scaling 0x%x\n", fmt->desc, vouvcr);
510
511 /* To produce a colour bar for testing set bit 23 of VOUVCR */
512 sh_vou_reg_ab_write(vou_dev, VOUVCR, vouvcr);
513 sh_vou_reg_ab_write(vou_dev, VOUDFR,
514 fmt->pkf | (fmt->yf << 8) | (fmt->rgb << 16));
515 }
516
517 struct sh_vou_geometry {
518 struct v4l2_rect output;
519 unsigned int in_width;
520 unsigned int in_height;
521 int scale_idx_h;
522 int scale_idx_v;
523 };
524
525 /*
526 * Find input geometry, that we can use to produce output, closest to the
527 * requested rectangle, using VOU scaling
528 */
529 static void vou_adjust_input(struct sh_vou_geometry *geo, v4l2_std_id std)
530 {
531 /* The compiler cannot know, that best and idx will indeed be set */
532 unsigned int best_err = UINT_MAX, best = 0, img_height_max;
533 int i, idx = 0;
534
535 if (std & V4L2_STD_525_60)
536 img_height_max = 480;
537 else
538 img_height_max = 576;
539
540 /* Image width must be a multiple of 4 */
541 v4l_bound_align_image(&geo->in_width, 0, VOU_MAX_IMAGE_WIDTH, 2,
542 &geo->in_height, 0, img_height_max, 1, 0);
543
544 /* Select scales to come as close as possible to the output image */
545 for (i = ARRAY_SIZE(vou_scale_h_num) - 1; i >= 0; i--) {
546 unsigned int err;
547 unsigned int found = geo->output.width * vou_scale_h_den[i] /
548 vou_scale_h_num[i];
549
550 if (found > VOU_MAX_IMAGE_WIDTH)
551 /* scales increase */
552 break;
553
554 err = abs(found - geo->in_width);
555 if (err < best_err) {
556 best_err = err;
557 idx = i;
558 best = found;
559 }
560 if (!err)
561 break;
562 }
563
564 geo->in_width = best;
565 geo->scale_idx_h = idx;
566
567 best_err = UINT_MAX;
568
569 /* This loop can be replaced with one division */
570 for (i = ARRAY_SIZE(vou_scale_v_num) - 1; i >= 0; i--) {
571 unsigned int err;
572 unsigned int found = geo->output.height * vou_scale_v_den[i] /
573 vou_scale_v_num[i];
574
575 if (found > img_height_max)
576 /* scales increase */
577 break;
578
579 err = abs(found - geo->in_height);
580 if (err < best_err) {
581 best_err = err;
582 idx = i;
583 best = found;
584 }
585 if (!err)
586 break;
587 }
588
589 geo->in_height = best;
590 geo->scale_idx_v = idx;
591 }
592
593 /*
594 * Find output geometry, that we can produce, using VOU scaling, closest to
595 * the requested rectangle
596 */
597 static void vou_adjust_output(struct sh_vou_geometry *geo, v4l2_std_id std)
598 {
599 unsigned int best_err = UINT_MAX, best, width_max, height_max,
600 img_height_max;
601 int i, idx;
602
603 if (std & V4L2_STD_525_60) {
604 width_max = 858;
605 height_max = 262 * 2;
606 img_height_max = 480;
607 } else {
608 width_max = 864;
609 height_max = 312 * 2;
610 img_height_max = 576;
611 }
612
613 /* Select scales to come as close as possible to the output image */
614 for (i = 0; i < ARRAY_SIZE(vou_scale_h_num); i++) {
615 unsigned int err;
616 unsigned int found = geo->in_width * vou_scale_h_num[i] /
617 vou_scale_h_den[i];
618
619 if (found > VOU_MAX_IMAGE_WIDTH)
620 /* scales increase */
621 break;
622
623 err = abs(found - geo->output.width);
624 if (err < best_err) {
625 best_err = err;
626 idx = i;
627 best = found;
628 }
629 if (!err)
630 break;
631 }
632
633 geo->output.width = best;
634 geo->scale_idx_h = idx;
635 if (geo->output.left + best > width_max)
636 geo->output.left = width_max - best;
637
638 pr_debug("%s(): W %u * %u/%u = %u\n", __func__, geo->in_width,
639 vou_scale_h_num[idx], vou_scale_h_den[idx], best);
640
641 best_err = UINT_MAX;
642
643 /* This loop can be replaced with one division */
644 for (i = 0; i < ARRAY_SIZE(vou_scale_v_num); i++) {
645 unsigned int err;
646 unsigned int found = geo->in_height * vou_scale_v_num[i] /
647 vou_scale_v_den[i];
648
649 if (found > img_height_max)
650 /* scales increase */
651 break;
652
653 err = abs(found - geo->output.height);
654 if (err < best_err) {
655 best_err = err;
656 idx = i;
657 best = found;
658 }
659 if (!err)
660 break;
661 }
662
663 geo->output.height = best;
664 geo->scale_idx_v = idx;
665 if (geo->output.top + best > height_max)
666 geo->output.top = height_max - best;
667
668 pr_debug("%s(): H %u * %u/%u = %u\n", __func__, geo->in_height,
669 vou_scale_v_num[idx], vou_scale_v_den[idx], best);
670 }
671
672 static int sh_vou_s_fmt_vid_out(struct file *file, void *priv,
673 struct v4l2_format *fmt)
674 {
675 struct video_device *vdev = video_devdata(file);
676 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
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_file *vou_file = priv;
769 struct v4l2_pix_format *pix = &fmt->fmt.pix;
770 int i;
771
772 dev_dbg(vou_file->vbq.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; 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_file *vou_file = priv;
793
794 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
795
796 if (req->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
797 return -EINVAL;
798
799 return videobuf_reqbufs(&vou_file->vbq, req);
800 }
801
802 static int sh_vou_querybuf(struct file *file, void *priv,
803 struct v4l2_buffer *b)
804 {
805 struct sh_vou_file *vou_file = priv;
806
807 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
808
809 return videobuf_querybuf(&vou_file->vbq, b);
810 }
811
812 static int sh_vou_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
813 {
814 struct sh_vou_file *vou_file = priv;
815
816 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
817
818 return videobuf_qbuf(&vou_file->vbq, b);
819 }
820
821 static int sh_vou_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
822 {
823 struct sh_vou_file *vou_file = priv;
824
825 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
826
827 return videobuf_dqbuf(&vou_file->vbq, b, file->f_flags & O_NONBLOCK);
828 }
829
830 static int sh_vou_streamon(struct file *file, void *priv,
831 enum v4l2_buf_type buftype)
832 {
833 struct video_device *vdev = video_devdata(file);
834 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
835 struct sh_vou_file *vou_file = priv;
836 int ret;
837
838 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
839
840 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
841 video, s_stream, 1);
842 if (ret < 0 && ret != -ENOIOCTLCMD)
843 return ret;
844
845 /* This calls our .buf_queue() (== sh_vou_buf_queue) */
846 return videobuf_streamon(&vou_file->vbq);
847 }
848
849 static int sh_vou_streamoff(struct file *file, void *priv,
850 enum v4l2_buf_type buftype)
851 {
852 struct video_device *vdev = video_devdata(file);
853 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
854 struct sh_vou_file *vou_file = priv;
855
856 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
857
858 /*
859 * This calls buf_release from host driver's videobuf_queue_ops for all
860 * remaining buffers. When the last buffer is freed, stop streaming
861 */
862 videobuf_streamoff(&vou_file->vbq);
863 v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video, s_stream, 0);
864
865 return 0;
866 }
867
868 static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)
869 {
870 switch (bus_fmt) {
871 default:
872 pr_warning("%s(): Invalid bus-format code %d, using default 8-bit\n",
873 __func__, bus_fmt);
874 case SH_VOU_BUS_8BIT:
875 return 1;
876 case SH_VOU_BUS_16BIT:
877 return 0;
878 case SH_VOU_BUS_BT656:
879 return 3;
880 }
881 }
882
883 static int sh_vou_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
884 {
885 struct video_device *vdev = video_devdata(file);
886 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
887 int ret;
888
889 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): 0x%llx\n", __func__, *std_id);
890
891 if (*std_id & ~vdev->tvnorms)
892 return -EINVAL;
893
894 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
895 s_std_output, *std_id);
896 /* Shall we continue, if the subdev doesn't support .s_std_output()? */
897 if (ret < 0 && ret != -ENOIOCTLCMD)
898 return ret;
899
900 if (*std_id & V4L2_STD_525_60)
901 sh_vou_reg_ab_set(vou_dev, VOUCR,
902 sh_vou_ntsc_mode(vou_dev->pdata->bus_fmt) << 29, 7 << 29);
903 else
904 sh_vou_reg_ab_set(vou_dev, VOUCR, 5 << 29, 7 << 29);
905
906 vou_dev->std = *std_id;
907
908 return 0;
909 }
910
911 static int sh_vou_g_std(struct file *file, void *priv, v4l2_std_id *std)
912 {
913 struct video_device *vdev = video_devdata(file);
914 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
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 video_device *vdev = video_devdata(file);
926 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
927
928 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
929
930 a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
931 a->c = vou_dev->rect;
932
933 return 0;
934 }
935
936 /* Assume a dull encoder, do all the work ourselves. */
937 static int sh_vou_s_crop(struct file *file, void *fh, struct v4l2_crop *a)
938 {
939 struct video_device *vdev = video_devdata(file);
940 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
941 struct v4l2_rect *rect = &a->c;
942 struct v4l2_crop sd_crop = {.type = V4L2_BUF_TYPE_VIDEO_OUTPUT};
943 struct v4l2_pix_format *pix = &vou_dev->pix;
944 struct sh_vou_geometry geo;
945 struct v4l2_mbus_framefmt mbfmt = {
946 /* Revisit: is this the correct code? */
947 .code = V4L2_MBUS_FMT_YUYV8_2X8,
948 .field = V4L2_FIELD_INTERLACED,
949 .colorspace = V4L2_COLORSPACE_SMPTE170M,
950 };
951 unsigned int img_height_max;
952 int ret;
953
954 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u@%u:%u\n", __func__,
955 rect->width, rect->height, rect->left, rect->top);
956
957 if (a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
958 return -EINVAL;
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, 0, VOU_MAX_IMAGE_WIDTH, 1,
966 &rect->height, 0, 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 mbfmt.width = geo.output.width;
988 mbfmt.height = geo.output.height;
989 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
990 s_mbus_fmt, &mbfmt);
991 /* Must be implemented, so, don't check for -ENOIOCTLCMD */
992 if (ret < 0)
993 return ret;
994
995 /* Sanity checks */
996 if ((unsigned)mbfmt.width > VOU_MAX_IMAGE_WIDTH ||
997 (unsigned)mbfmt.height > img_height_max ||
998 mbfmt.code != V4L2_MBUS_FMT_YUYV8_2X8)
999 return -EIO;
1000
1001 geo.output.width = mbfmt.width;
1002 geo.output.height = mbfmt.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 /*
1022 * Total field: NTSC 858 x 2 * 262/263, PAL 864 x 2 * 312/313, default rectangle
1023 * is the initial register values, height takes the interlaced format into
1024 * account. The actual image can only go up to 720 x 2 * 240, So, VOUVPR can
1025 * actually only meaningfully contain values <= 720 and <= 240 respectively, and
1026 * not <= 864 and <= 312.
1027 */
1028 static int sh_vou_cropcap(struct file *file, void *priv,
1029 struct v4l2_cropcap *a)
1030 {
1031 struct sh_vou_file *vou_file = priv;
1032
1033 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1034
1035 a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1036 a->bounds.left = 0;
1037 a->bounds.top = 0;
1038 a->bounds.width = VOU_MAX_IMAGE_WIDTH;
1039 a->bounds.height = VOU_MAX_IMAGE_HEIGHT;
1040 /* Default = max, set VOUDPR = 0, which is not hardware default */
1041 a->defrect.left = 0;
1042 a->defrect.top = 0;
1043 a->defrect.width = VOU_MAX_IMAGE_WIDTH;
1044 a->defrect.height = VOU_MAX_IMAGE_HEIGHT;
1045 a->pixelaspect.numerator = 1;
1046 a->pixelaspect.denominator = 1;
1047
1048 return 0;
1049 }
1050
1051 static irqreturn_t sh_vou_isr(int irq, void *dev_id)
1052 {
1053 struct sh_vou_device *vou_dev = dev_id;
1054 static unsigned long j;
1055 struct videobuf_buffer *vb;
1056 static int cnt;
1057 static int side;
1058 u32 irq_status = sh_vou_reg_a_read(vou_dev, VOUIR), masked;
1059 u32 vou_status = sh_vou_reg_a_read(vou_dev, VOUSTR);
1060
1061 if (!(irq_status & 0x300)) {
1062 if (printk_timed_ratelimit(&j, 500))
1063 dev_warn(vou_dev->v4l2_dev.dev, "IRQ status 0x%x!\n",
1064 irq_status);
1065 return IRQ_NONE;
1066 }
1067
1068 spin_lock(&vou_dev->lock);
1069 if (!vou_dev->active || list_empty(&vou_dev->queue)) {
1070 if (printk_timed_ratelimit(&j, 500))
1071 dev_warn(vou_dev->v4l2_dev.dev,
1072 "IRQ without active buffer: %x!\n", irq_status);
1073 /* Just ack: buf_release will disable further interrupts */
1074 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x300);
1075 spin_unlock(&vou_dev->lock);
1076 return IRQ_HANDLED;
1077 }
1078
1079 masked = ~(0x300 & irq_status) & irq_status & 0x30304;
1080 dev_dbg(vou_dev->v4l2_dev.dev,
1081 "IRQ status 0x%x -> 0x%x, VOU status 0x%x, cnt %d\n",
1082 irq_status, masked, vou_status, cnt);
1083
1084 cnt++;
1085 side = vou_status & 0x10000;
1086
1087 /* Clear only set interrupts */
1088 sh_vou_reg_a_write(vou_dev, VOUIR, masked);
1089
1090 vb = vou_dev->active;
1091 list_del(&vb->queue);
1092
1093 vb->state = VIDEOBUF_DONE;
1094 do_gettimeofday(&vb->ts);
1095 vb->field_count++;
1096 wake_up(&vb->done);
1097
1098 if (list_empty(&vou_dev->queue)) {
1099 /* Stop VOU */
1100 dev_dbg(vou_dev->v4l2_dev.dev, "%s: queue empty after %d\n",
1101 __func__, cnt);
1102 sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
1103 vou_dev->active = NULL;
1104 vou_dev->status = SH_VOU_INITIALISING;
1105 /* Disable End-of-Frame (VSYNC) interrupts */
1106 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
1107 spin_unlock(&vou_dev->lock);
1108 return IRQ_HANDLED;
1109 }
1110
1111 vou_dev->active = list_entry(vou_dev->queue.next,
1112 struct videobuf_buffer, queue);
1113
1114 if (vou_dev->active->queue.next != &vou_dev->queue) {
1115 struct videobuf_buffer *new = list_entry(vou_dev->active->queue.next,
1116 struct videobuf_buffer, queue);
1117 sh_vou_schedule_next(vou_dev, new);
1118 }
1119
1120 spin_unlock(&vou_dev->lock);
1121
1122 return IRQ_HANDLED;
1123 }
1124
1125 static int sh_vou_hw_init(struct sh_vou_device *vou_dev)
1126 {
1127 struct sh_vou_pdata *pdata = vou_dev->pdata;
1128 u32 voucr = sh_vou_ntsc_mode(pdata->bus_fmt) << 29;
1129 int i = 100;
1130
1131 /* Disable all IRQs */
1132 sh_vou_reg_a_write(vou_dev, VOUIR, 0);
1133
1134 /* Reset VOU interfaces - registers unaffected */
1135 sh_vou_reg_a_write(vou_dev, VOUSRR, 0x101);
1136 while (--i && (sh_vou_reg_a_read(vou_dev, VOUSRR) & 0x101))
1137 udelay(1);
1138
1139 if (!i)
1140 return -ETIMEDOUT;
1141
1142 dev_dbg(vou_dev->v4l2_dev.dev, "Reset took %dus\n", 100 - i);
1143
1144 if (pdata->flags & SH_VOU_PCLK_FALLING)
1145 voucr |= 1 << 28;
1146 if (pdata->flags & SH_VOU_HSYNC_LOW)
1147 voucr |= 1 << 27;
1148 if (pdata->flags & SH_VOU_VSYNC_LOW)
1149 voucr |= 1 << 26;
1150 sh_vou_reg_ab_set(vou_dev, VOUCR, voucr, 0xfc000000);
1151
1152 /* Manual register side switching at first */
1153 sh_vou_reg_a_write(vou_dev, VOURCR, 4);
1154 /* Default - fixed HSYNC length, can be made configurable is required */
1155 sh_vou_reg_ab_write(vou_dev, VOUMSR, 0x800000);
1156
1157 return 0;
1158 }
1159
1160 /* File operations */
1161 static int sh_vou_open(struct file *file)
1162 {
1163 struct video_device *vdev = video_devdata(file);
1164 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1165 struct sh_vou_file *vou_file = kzalloc(sizeof(struct sh_vou_file),
1166 GFP_KERNEL);
1167
1168 if (!vou_file)
1169 return -ENOMEM;
1170
1171 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
1172
1173 file->private_data = vou_file;
1174
1175 if (atomic_inc_return(&vou_dev->use_count) == 1) {
1176 int ret;
1177 /* First open */
1178 vou_dev->status = SH_VOU_INITIALISING;
1179 pm_runtime_get_sync(vdev->v4l2_dev->dev);
1180 ret = sh_vou_hw_init(vou_dev);
1181 if (ret < 0) {
1182 atomic_dec(&vou_dev->use_count);
1183 pm_runtime_put(vdev->v4l2_dev->dev);
1184 vou_dev->status = SH_VOU_IDLE;
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), vdev,
1194 &vou_dev->fop_lock);
1195
1196 return 0;
1197 }
1198
1199 static int sh_vou_release(struct file *file)
1200 {
1201 struct video_device *vdev = video_devdata(file);
1202 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1203 struct sh_vou_file *vou_file = file->private_data;
1204
1205 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1206
1207 if (!atomic_dec_return(&vou_dev->use_count)) {
1208 /* Last close */
1209 vou_dev->status = SH_VOU_IDLE;
1210 sh_vou_reg_a_set(vou_dev, VOUER, 0, 0x101);
1211 pm_runtime_put(vdev->v4l2_dev->dev);
1212 }
1213
1214 file->private_data = NULL;
1215 kfree(vou_file);
1216
1217 return 0;
1218 }
1219
1220 static int sh_vou_mmap(struct file *file, struct vm_area_struct *vma)
1221 {
1222 struct sh_vou_file *vou_file = file->private_data;
1223
1224 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1225
1226 return videobuf_mmap_mapper(&vou_file->vbq, vma);
1227 }
1228
1229 static unsigned int sh_vou_poll(struct file *file, poll_table *wait)
1230 {
1231 struct sh_vou_file *vou_file = file->private_data;
1232
1233 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1234
1235 return videobuf_poll_stream(file, &vou_file->vbq, wait);
1236 }
1237
1238 static int sh_vou_g_chip_ident(struct file *file, void *fh,
1239 struct v4l2_dbg_chip_ident *id)
1240 {
1241 struct video_device *vdev = video_devdata(file);
1242 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1243
1244 return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, g_chip_ident, id);
1245 }
1246
1247 #ifdef CONFIG_VIDEO_ADV_DEBUG
1248 static int sh_vou_g_register(struct file *file, void *fh,
1249 struct v4l2_dbg_register *reg)
1250 {
1251 struct video_device *vdev = video_devdata(file);
1252 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1253
1254 return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, g_register, reg);
1255 }
1256
1257 static int sh_vou_s_register(struct file *file, void *fh,
1258 struct v4l2_dbg_register *reg)
1259 {
1260 struct video_device *vdev = video_devdata(file);
1261 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1262
1263 return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, s_register, reg);
1264 }
1265 #endif
1266
1267 /* sh_vou display ioctl operations */
1268 static const struct v4l2_ioctl_ops sh_vou_ioctl_ops = {
1269 .vidioc_querycap = sh_vou_querycap,
1270 .vidioc_enum_fmt_vid_out = sh_vou_enum_fmt_vid_out,
1271 .vidioc_g_fmt_vid_out = sh_vou_g_fmt_vid_out,
1272 .vidioc_s_fmt_vid_out = sh_vou_s_fmt_vid_out,
1273 .vidioc_try_fmt_vid_out = sh_vou_try_fmt_vid_out,
1274 .vidioc_reqbufs = sh_vou_reqbufs,
1275 .vidioc_querybuf = sh_vou_querybuf,
1276 .vidioc_qbuf = sh_vou_qbuf,
1277 .vidioc_dqbuf = sh_vou_dqbuf,
1278 .vidioc_streamon = sh_vou_streamon,
1279 .vidioc_streamoff = sh_vou_streamoff,
1280 .vidioc_s_std = sh_vou_s_std,
1281 .vidioc_g_std = sh_vou_g_std,
1282 .vidioc_cropcap = sh_vou_cropcap,
1283 .vidioc_g_crop = sh_vou_g_crop,
1284 .vidioc_s_crop = sh_vou_s_crop,
1285 .vidioc_g_chip_ident = sh_vou_g_chip_ident,
1286 #ifdef CONFIG_VIDEO_ADV_DEBUG
1287 .vidioc_g_register = sh_vou_g_register,
1288 .vidioc_s_register = sh_vou_s_register,
1289 #endif
1290 };
1291
1292 static const struct v4l2_file_operations sh_vou_fops = {
1293 .owner = THIS_MODULE,
1294 .open = sh_vou_open,
1295 .release = sh_vou_release,
1296 .unlocked_ioctl = video_ioctl2,
1297 .mmap = sh_vou_mmap,
1298 .poll = sh_vou_poll,
1299 };
1300
1301 static const struct video_device sh_vou_video_template = {
1302 .name = "sh_vou",
1303 .fops = &sh_vou_fops,
1304 .ioctl_ops = &sh_vou_ioctl_ops,
1305 .tvnorms = V4L2_STD_525_60, /* PAL only supported in 8-bit non-bt656 mode */
1306 .current_norm = V4L2_STD_NTSC_M,
1307 };
1308
1309 static int __devinit sh_vou_probe(struct platform_device *pdev)
1310 {
1311 struct sh_vou_pdata *vou_pdata = pdev->dev.platform_data;
1312 struct v4l2_rect *rect;
1313 struct v4l2_pix_format *pix;
1314 struct i2c_adapter *i2c_adap;
1315 struct video_device *vdev;
1316 struct sh_vou_device *vou_dev;
1317 struct resource *reg_res, *region;
1318 struct v4l2_subdev *subdev;
1319 int irq, ret;
1320
1321 reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1322 irq = platform_get_irq(pdev, 0);
1323
1324 if (!vou_pdata || !reg_res || irq <= 0) {
1325 dev_err(&pdev->dev, "Insufficient VOU platform information.\n");
1326 return -ENODEV;
1327 }
1328
1329 vou_dev = kzalloc(sizeof(*vou_dev), GFP_KERNEL);
1330 if (!vou_dev)
1331 return -ENOMEM;
1332
1333 INIT_LIST_HEAD(&vou_dev->queue);
1334 spin_lock_init(&vou_dev->lock);
1335 mutex_init(&vou_dev->fop_lock);
1336 atomic_set(&vou_dev->use_count, 0);
1337 vou_dev->pdata = vou_pdata;
1338 vou_dev->status = SH_VOU_IDLE;
1339
1340 rect = &vou_dev->rect;
1341 pix = &vou_dev->pix;
1342
1343 /* Fill in defaults */
1344 vou_dev->std = sh_vou_video_template.current_norm;
1345 rect->left = 0;
1346 rect->top = 0;
1347 rect->width = VOU_MAX_IMAGE_WIDTH;
1348 rect->height = 480;
1349 pix->width = VOU_MAX_IMAGE_WIDTH;
1350 pix->height = 480;
1351 pix->pixelformat = V4L2_PIX_FMT_YVYU;
1352 pix->field = V4L2_FIELD_NONE;
1353 pix->bytesperline = VOU_MAX_IMAGE_WIDTH * 2;
1354 pix->sizeimage = VOU_MAX_IMAGE_WIDTH * 2 * 480;
1355 pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
1356
1357 region = request_mem_region(reg_res->start, resource_size(reg_res),
1358 pdev->name);
1359 if (!region) {
1360 dev_err(&pdev->dev, "VOU region already claimed\n");
1361 ret = -EBUSY;
1362 goto ereqmemreg;
1363 }
1364
1365 vou_dev->base = ioremap(reg_res->start, resource_size(reg_res));
1366 if (!vou_dev->base) {
1367 ret = -ENOMEM;
1368 goto emap;
1369 }
1370
1371 ret = request_irq(irq, sh_vou_isr, 0, "vou", vou_dev);
1372 if (ret < 0)
1373 goto ereqirq;
1374
1375 ret = v4l2_device_register(&pdev->dev, &vou_dev->v4l2_dev);
1376 if (ret < 0) {
1377 dev_err(&pdev->dev, "Error registering v4l2 device\n");
1378 goto ev4l2devreg;
1379 }
1380
1381 /* Allocate memory for video device */
1382 vdev = video_device_alloc();
1383 if (vdev == NULL) {
1384 ret = -ENOMEM;
1385 goto evdevalloc;
1386 }
1387
1388 *vdev = sh_vou_video_template;
1389 if (vou_pdata->bus_fmt == SH_VOU_BUS_8BIT)
1390 vdev->tvnorms |= V4L2_STD_PAL;
1391 vdev->v4l2_dev = &vou_dev->v4l2_dev;
1392 vdev->release = video_device_release;
1393 vdev->lock = &vou_dev->fop_lock;
1394
1395 vou_dev->vdev = vdev;
1396 video_set_drvdata(vdev, vou_dev);
1397
1398 pm_runtime_enable(&pdev->dev);
1399 pm_runtime_resume(&pdev->dev);
1400
1401 i2c_adap = i2c_get_adapter(vou_pdata->i2c_adap);
1402 if (!i2c_adap) {
1403 ret = -ENODEV;
1404 goto ei2cgadap;
1405 }
1406
1407 ret = sh_vou_hw_init(vou_dev);
1408 if (ret < 0)
1409 goto ereset;
1410
1411 subdev = v4l2_i2c_new_subdev_board(&vou_dev->v4l2_dev, i2c_adap,
1412 vou_pdata->board_info, NULL);
1413 if (!subdev) {
1414 ret = -ENOMEM;
1415 goto ei2cnd;
1416 }
1417
1418 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1419 if (ret < 0)
1420 goto evregdev;
1421
1422 return 0;
1423
1424 evregdev:
1425 ei2cnd:
1426 ereset:
1427 i2c_put_adapter(i2c_adap);
1428 ei2cgadap:
1429 video_device_release(vdev);
1430 pm_runtime_disable(&pdev->dev);
1431 evdevalloc:
1432 v4l2_device_unregister(&vou_dev->v4l2_dev);
1433 ev4l2devreg:
1434 free_irq(irq, vou_dev);
1435 ereqirq:
1436 iounmap(vou_dev->base);
1437 emap:
1438 release_mem_region(reg_res->start, resource_size(reg_res));
1439 ereqmemreg:
1440 kfree(vou_dev);
1441 return ret;
1442 }
1443
1444 static int __devexit sh_vou_remove(struct platform_device *pdev)
1445 {
1446 int irq = platform_get_irq(pdev, 0);
1447 struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1448 struct sh_vou_device *vou_dev = container_of(v4l2_dev,
1449 struct sh_vou_device, v4l2_dev);
1450 struct v4l2_subdev *sd = list_entry(v4l2_dev->subdevs.next,
1451 struct v4l2_subdev, list);
1452 struct i2c_client *client = v4l2_get_subdevdata(sd);
1453 struct resource *reg_res;
1454
1455 if (irq > 0)
1456 free_irq(irq, vou_dev);
1457 pm_runtime_disable(&pdev->dev);
1458 video_unregister_device(vou_dev->vdev);
1459 i2c_put_adapter(client->adapter);
1460 v4l2_device_unregister(&vou_dev->v4l2_dev);
1461 iounmap(vou_dev->base);
1462 reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1463 if (reg_res)
1464 release_mem_region(reg_res->start, resource_size(reg_res));
1465 kfree(vou_dev);
1466 return 0;
1467 }
1468
1469 static struct platform_driver __refdata sh_vou = {
1470 .remove = __devexit_p(sh_vou_remove),
1471 .driver = {
1472 .name = "sh-vou",
1473 .owner = THIS_MODULE,
1474 },
1475 };
1476
1477 static int __init sh_vou_init(void)
1478 {
1479 return platform_driver_probe(&sh_vou, sh_vou_probe);
1480 }
1481
1482 static void __exit sh_vou_exit(void)
1483 {
1484 platform_driver_unregister(&sh_vou);
1485 }
1486
1487 module_init(sh_vou_init);
1488 module_exit(sh_vou_exit);
1489
1490 MODULE_DESCRIPTION("SuperH VOU driver");
1491 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1492 MODULE_LICENSE("GPL v2");
1493 MODULE_ALIAS("platform:sh-vou");
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree