[media] cx88: properly maintain decoder config when using MPEG encoder
[pandora-kernel.git] / drivers / media / video / 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
24 #include <media/sh_vou.h>
25 #include <media/v4l2-common.h>
26 #include <media/v4l2-device.h>
27 #include <media/v4l2-ioctl.h>
28 #include <media/v4l2-mediabus.h>
29 #include <media/videobuf-dma-contig.h>
30
31 /* Mirror addresses are not available for all registers */
32 #define VOUER   0
33 #define VOUCR   4
34 #define VOUSTR  8
35 #define VOUVCR  0xc
36 #define VOUISR  0x10
37 #define VOUBCR  0x14
38 #define VOUDPR  0x18
39 #define VOUDSR  0x1c
40 #define VOUVPR  0x20
41 #define VOUIR   0x24
42 #define VOUSRR  0x28
43 #define VOUMSR  0x2c
44 #define VOUHIR  0x30
45 #define VOUDFR  0x34
46 #define VOUAD1R 0x38
47 #define VOUAD2R 0x3c
48 #define VOUAIR  0x40
49 #define VOUSWR  0x44
50 #define VOURCR  0x48
51 #define VOURPR  0x50
52
53 enum sh_vou_status {
54         SH_VOU_IDLE,
55         SH_VOU_INITIALISING,
56         SH_VOU_RUNNING,
57 };
58
59 #define VOU_MAX_IMAGE_WIDTH     720
60 #define VOU_MAX_IMAGE_HEIGHT    576
61
62 struct sh_vou_device {
63         struct v4l2_device v4l2_dev;
64         struct video_device *vdev;
65         atomic_t use_count;
66         struct sh_vou_pdata *pdata;
67         spinlock_t lock;
68         void __iomem *base;
69         /* State information */
70         struct v4l2_pix_format pix;
71         struct v4l2_rect rect;
72         struct list_head queue;
73         v4l2_std_id std;
74         int pix_idx;
75         struct videobuf_buffer *active;
76         enum sh_vou_status status;
77         struct mutex fop_lock;
78 };
79
80 struct sh_vou_file {
81         struct videobuf_queue vbq;
82 };
83
84 /* Register access routines for sides A, B and mirror addresses */
85 static void sh_vou_reg_a_write(struct sh_vou_device *vou_dev, unsigned int reg,
86                                u32 value)
87 {
88         __raw_writel(value, vou_dev->base + reg);
89 }
90
91 static void sh_vou_reg_ab_write(struct sh_vou_device *vou_dev, unsigned int reg,
92                                 u32 value)
93 {
94         __raw_writel(value, vou_dev->base + reg);
95         __raw_writel(value, vou_dev->base + reg + 0x1000);
96 }
97
98 static void sh_vou_reg_m_write(struct sh_vou_device *vou_dev, unsigned int reg,
99                                u32 value)
100 {
101         __raw_writel(value, vou_dev->base + reg + 0x2000);
102 }
103
104 static u32 sh_vou_reg_a_read(struct sh_vou_device *vou_dev, unsigned int reg)
105 {
106         return __raw_readl(vou_dev->base + reg);
107 }
108
109 static void sh_vou_reg_a_set(struct sh_vou_device *vou_dev, unsigned int reg,
110                              u32 value, u32 mask)
111 {
112         u32 old = __raw_readl(vou_dev->base + reg);
113
114         value = (value & mask) | (old & ~mask);
115         __raw_writel(value, vou_dev->base + reg);
116 }
117
118 static void sh_vou_reg_b_set(struct sh_vou_device *vou_dev, unsigned int reg,
119                              u32 value, u32 mask)
120 {
121         sh_vou_reg_a_set(vou_dev, reg + 0x1000, value, mask);
122 }
123
124 static void sh_vou_reg_ab_set(struct sh_vou_device *vou_dev, unsigned int reg,
125                               u32 value, u32 mask)
126 {
127         sh_vou_reg_a_set(vou_dev, reg, value, mask);
128         sh_vou_reg_b_set(vou_dev, reg, value, mask);
129 }
130
131 struct sh_vou_fmt {
132         u32             pfmt;
133         char            *desc;
134         unsigned char   bpp;
135         unsigned char   rgb;
136         unsigned char   yf;
137         unsigned char   pkf;
138 };
139
140 /* Further pixel formats can be added */
141 static struct sh_vou_fmt vou_fmt[] = {
142         {
143                 .pfmt   = V4L2_PIX_FMT_NV12,
144                 .bpp    = 12,
145                 .desc   = "YVU420 planar",
146                 .yf     = 0,
147                 .rgb    = 0,
148         },
149         {
150                 .pfmt   = V4L2_PIX_FMT_NV16,
151                 .bpp    = 16,
152                 .desc   = "YVYU planar",
153                 .yf     = 1,
154                 .rgb    = 0,
155         },
156         {
157                 .pfmt   = V4L2_PIX_FMT_RGB24,
158                 .bpp    = 24,
159                 .desc   = "RGB24",
160                 .pkf    = 2,
161                 .rgb    = 1,
162         },
163         {
164                 .pfmt   = V4L2_PIX_FMT_RGB565,
165                 .bpp    = 16,
166                 .desc   = "RGB565",
167                 .pkf    = 3,
168                 .rgb    = 1,
169         },
170         {
171                 .pfmt   = V4L2_PIX_FMT_RGB565X,
172                 .bpp    = 16,
173                 .desc   = "RGB565 byteswapped",
174                 .pkf    = 3,
175                 .rgb    = 1,
176         },
177 };
178
179 static void sh_vou_schedule_next(struct sh_vou_device *vou_dev,
180                                  struct videobuf_buffer *vb)
181 {
182         dma_addr_t addr1, addr2;
183
184         addr1 = videobuf_to_dma_contig(vb);
185         switch (vou_dev->pix.pixelformat) {
186         case V4L2_PIX_FMT_NV12:
187         case V4L2_PIX_FMT_NV16:
188                 addr2 = addr1 + vou_dev->pix.width * vou_dev->pix.height;
189                 break;
190         default:
191                 addr2 = 0;
192         }
193
194         sh_vou_reg_m_write(vou_dev, VOUAD1R, addr1);
195         sh_vou_reg_m_write(vou_dev, VOUAD2R, addr2);
196 }
197
198 static void sh_vou_stream_start(struct sh_vou_device *vou_dev,
199                                 struct videobuf_buffer *vb)
200 {
201         unsigned int row_coeff;
202 #ifdef __LITTLE_ENDIAN
203         u32 dataswap = 7;
204 #else
205         u32 dataswap = 0;
206 #endif
207
208         switch (vou_dev->pix.pixelformat) {
209         case V4L2_PIX_FMT_NV12:
210         case V4L2_PIX_FMT_NV16:
211                 row_coeff = 1;
212                 break;
213         case V4L2_PIX_FMT_RGB565:
214                 dataswap ^= 1;
215         case V4L2_PIX_FMT_RGB565X:
216                 row_coeff = 2;
217                 break;
218         case V4L2_PIX_FMT_RGB24:
219                 row_coeff = 3;
220                 break;
221         }
222
223         sh_vou_reg_a_write(vou_dev, VOUSWR, dataswap);
224         sh_vou_reg_ab_write(vou_dev, VOUAIR, vou_dev->pix.width * row_coeff);
225         sh_vou_schedule_next(vou_dev, vb);
226 }
227
228 static void free_buffer(struct videobuf_queue *vq, struct videobuf_buffer *vb)
229 {
230         BUG_ON(in_interrupt());
231
232         /* Wait until this buffer is no longer in STATE_QUEUED or STATE_ACTIVE */
233         videobuf_waiton(vq, vb, 0, 0);
234         videobuf_dma_contig_free(vq, vb);
235         vb->state = VIDEOBUF_NEEDS_INIT;
236 }
237
238 /* Locking: caller holds fop_lock mutex */
239 static int sh_vou_buf_setup(struct videobuf_queue *vq, unsigned int *count,
240                             unsigned int *size)
241 {
242         struct video_device *vdev = vq->priv_data;
243         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
244
245         *size = vou_fmt[vou_dev->pix_idx].bpp * vou_dev->pix.width *
246                 vou_dev->pix.height / 8;
247
248         if (*count < 2)
249                 *count = 2;
250
251         /* Taking into account maximum frame size, *count will stay >= 2 */
252         if (PAGE_ALIGN(*size) * *count > 4 * 1024 * 1024)
253                 *count = 4 * 1024 * 1024 / PAGE_ALIGN(*size);
254
255         dev_dbg(vq->dev, "%s(): count=%d, size=%d\n", __func__, *count, *size);
256
257         return 0;
258 }
259
260 /* Locking: caller holds fop_lock mutex */
261 static int sh_vou_buf_prepare(struct videobuf_queue *vq,
262                               struct videobuf_buffer *vb,
263                               enum v4l2_field field)
264 {
265         struct video_device *vdev = vq->priv_data;
266         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
267         struct v4l2_pix_format *pix = &vou_dev->pix;
268         int bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
269         int ret;
270
271         dev_dbg(vq->dev, "%s()\n", __func__);
272
273         if (vb->width   != pix->width ||
274             vb->height  != pix->height ||
275             vb->field   != pix->field) {
276                 vb->width       = pix->width;
277                 vb->height      = pix->height;
278                 vb->field       = field;
279                 if (vb->state != VIDEOBUF_NEEDS_INIT)
280                         free_buffer(vq, vb);
281         }
282
283         vb->size = vb->height * bytes_per_line;
284         if (vb->baddr && vb->bsize < vb->size) {
285                 /* User buffer too small */
286                 dev_warn(vq->dev, "User buffer too small: [%u] @ %lx\n",
287                          vb->bsize, vb->baddr);
288                 return -EINVAL;
289         }
290
291         if (vb->state == VIDEOBUF_NEEDS_INIT) {
292                 ret = videobuf_iolock(vq, vb, NULL);
293                 if (ret < 0) {
294                         dev_warn(vq->dev, "IOLOCK buf-type %d: %d\n",
295                                  vb->memory, ret);
296                         return ret;
297                 }
298                 vb->state = VIDEOBUF_PREPARED;
299         }
300
301         dev_dbg(vq->dev,
302                 "%s(): fmt #%d, %u bytes per line, phys 0x%x, type %d, state %d\n",
303                 __func__, vou_dev->pix_idx, bytes_per_line,
304                 videobuf_to_dma_contig(vb), vb->memory, vb->state);
305
306         return 0;
307 }
308
309 /* Locking: caller holds fop_lock mutex and vq->irqlock spinlock */
310 static void sh_vou_buf_queue(struct videobuf_queue *vq,
311                              struct videobuf_buffer *vb)
312 {
313         struct video_device *vdev = vq->priv_data;
314         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
315
316         dev_dbg(vq->dev, "%s()\n", __func__);
317
318         vb->state = VIDEOBUF_QUEUED;
319         list_add_tail(&vb->queue, &vou_dev->queue);
320
321         if (vou_dev->status == SH_VOU_RUNNING) {
322                 return;
323         } else if (!vou_dev->active) {
324                 vou_dev->active = vb;
325                 /* Start from side A: we use mirror addresses, so, set B */
326                 sh_vou_reg_a_write(vou_dev, VOURPR, 1);
327                 dev_dbg(vq->dev, "%s: first buffer status 0x%x\n", __func__,
328                         sh_vou_reg_a_read(vou_dev, VOUSTR));
329                 sh_vou_schedule_next(vou_dev, vb);
330                 /* Only activate VOU after the second buffer */
331         } else if (vou_dev->active->queue.next == &vb->queue) {
332                 /* Second buffer - initialise register side B */
333                 sh_vou_reg_a_write(vou_dev, VOURPR, 0);
334                 sh_vou_stream_start(vou_dev, vb);
335
336                 /* Register side switching with frame VSYNC */
337                 sh_vou_reg_a_write(vou_dev, VOURCR, 5);
338                 dev_dbg(vq->dev, "%s: second buffer status 0x%x\n", __func__,
339                         sh_vou_reg_a_read(vou_dev, VOUSTR));
340
341                 /* Enable End-of-Frame (VSYNC) interrupts */
342                 sh_vou_reg_a_write(vou_dev, VOUIR, 0x10004);
343                 /* Two buffers on the queue - activate the hardware */
344
345                 vou_dev->status = SH_VOU_RUNNING;
346                 sh_vou_reg_a_write(vou_dev, VOUER, 0x107);
347         }
348 }
349
350 static void sh_vou_buf_release(struct videobuf_queue *vq,
351                                struct videobuf_buffer *vb)
352 {
353         struct video_device *vdev = vq->priv_data;
354         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
355         unsigned long flags;
356
357         dev_dbg(vq->dev, "%s()\n", __func__);
358
359         spin_lock_irqsave(&vou_dev->lock, flags);
360
361         if (vou_dev->active == vb) {
362                 /* disable output */
363                 sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
364                 /* ...but the current frame will complete */
365                 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
366                 vou_dev->active = NULL;
367         }
368
369         if ((vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED)) {
370                 vb->state = VIDEOBUF_ERROR;
371                 list_del(&vb->queue);
372         }
373
374         spin_unlock_irqrestore(&vou_dev->lock, flags);
375
376         free_buffer(vq, vb);
377 }
378
379 static struct videobuf_queue_ops sh_vou_video_qops = {
380         .buf_setup      = sh_vou_buf_setup,
381         .buf_prepare    = sh_vou_buf_prepare,
382         .buf_queue      = sh_vou_buf_queue,
383         .buf_release    = sh_vou_buf_release,
384 };
385
386 /* Video IOCTLs */
387 static int sh_vou_querycap(struct file *file, void  *priv,
388                            struct v4l2_capability *cap)
389 {
390         struct sh_vou_file *vou_file = priv;
391
392         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
393
394         strlcpy(cap->card, "SuperH VOU", sizeof(cap->card));
395         cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
396         return 0;
397 }
398
399 /* Enumerate formats, that the device can accept from the user */
400 static int sh_vou_enum_fmt_vid_out(struct file *file, void  *priv,
401                                    struct v4l2_fmtdesc *fmt)
402 {
403         struct sh_vou_file *vou_file = priv;
404
405         if (fmt->index >= ARRAY_SIZE(vou_fmt))
406                 return -EINVAL;
407
408         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
409
410         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
411         strlcpy(fmt->description, vou_fmt[fmt->index].desc,
412                 sizeof(fmt->description));
413         fmt->pixelformat = vou_fmt[fmt->index].pfmt;
414
415         return 0;
416 }
417
418 static int sh_vou_g_fmt_vid_out(struct file *file, void *priv,
419                                 struct v4l2_format *fmt)
420 {
421         struct video_device *vdev = video_devdata(file);
422         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
423
424         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
425
426         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
427         fmt->fmt.pix = vou_dev->pix;
428
429         return 0;
430 }
431
432 static const unsigned char vou_scale_h_num[] = {1, 9, 2, 9, 4};
433 static const unsigned char vou_scale_h_den[] = {1, 8, 1, 4, 1};
434 static const unsigned char vou_scale_h_fld[] = {0, 2, 1, 3};
435 static const unsigned char vou_scale_v_num[] = {1, 2, 4};
436 static const unsigned char vou_scale_v_den[] = {1, 1, 1};
437 static const unsigned char vou_scale_v_fld[] = {0, 1};
438
439 static void sh_vou_configure_geometry(struct sh_vou_device *vou_dev,
440                                       int pix_idx, int w_idx, int h_idx)
441 {
442         struct sh_vou_fmt *fmt = vou_fmt + pix_idx;
443         unsigned int black_left, black_top, width_max, height_max,
444                 frame_in_height, frame_out_height, frame_out_top;
445         struct v4l2_rect *rect = &vou_dev->rect;
446         struct v4l2_pix_format *pix = &vou_dev->pix;
447         u32 vouvcr = 0, dsr_h, dsr_v;
448
449         if (vou_dev->std & V4L2_STD_525_60) {
450                 width_max = 858;
451                 height_max = 262;
452         } else {
453                 width_max = 864;
454                 height_max = 312;
455         }
456
457         frame_in_height = pix->height / 2;
458         frame_out_height = rect->height / 2;
459         frame_out_top = rect->top / 2;
460
461         /*
462          * Cropping scheme: max useful image is 720x480, and the total video
463          * area is 858x525 (NTSC) or 864x625 (PAL). AK8813 / 8814 starts
464          * sampling data beginning with fixed 276th (NTSC) / 288th (PAL) clock,
465          * of which the first 33 / 25 clocks HSYNC must be held active. This
466          * has to be configured in CR[HW]. 1 pixel equals 2 clock periods.
467          * This gives CR[HW] = 16 / 12, VPR[HVP] = 138 / 144, which gives
468          * exactly 858 - 138 = 864 - 144 = 720! We call the out-of-display area,
469          * beyond DSR, specified on the left and top by the VPR register "black
470          * pixels" and out-of-image area (DPR) "background pixels." We fix VPR
471          * at 138 / 144 : 20, because that's the HSYNC timing, that our first
472          * client requires, and that's exactly what leaves us 720 pixels for the
473          * image; we leave VPR[VVP] at default 20 for now, because the client
474          * doesn't seem to have any special requirements for it. Otherwise we
475          * could also set it to max - 240 = 22 / 72. Thus VPR depends only on
476          * the selected standard, and DPR and DSR are selected according to
477          * cropping. Q: how does the client detect the first valid line? Does
478          * HSYNC stay inactive during invalid (black) lines?
479          */
480         black_left = width_max - VOU_MAX_IMAGE_WIDTH;
481         black_top = 20;
482
483         dsr_h = rect->width + rect->left;
484         dsr_v = frame_out_height + frame_out_top;
485
486         dev_dbg(vou_dev->v4l2_dev.dev,
487                 "image %ux%u, black %u:%u, offset %u:%u, display %ux%u\n",
488                 pix->width, frame_in_height, black_left, black_top,
489                 rect->left, frame_out_top, dsr_h, dsr_v);
490
491         /* VOUISR height - half of a frame height in frame mode */
492         sh_vou_reg_ab_write(vou_dev, VOUISR, (pix->width << 16) | frame_in_height);
493         sh_vou_reg_ab_write(vou_dev, VOUVPR, (black_left << 16) | black_top);
494         sh_vou_reg_ab_write(vou_dev, VOUDPR, (rect->left << 16) | frame_out_top);
495         sh_vou_reg_ab_write(vou_dev, VOUDSR, (dsr_h << 16) | dsr_v);
496
497         /*
498          * if necessary, we could set VOUHIR to
499          * max(black_left + dsr_h, width_max) here
500          */
501
502         if (w_idx)
503                 vouvcr |= (1 << 15) | (vou_scale_h_fld[w_idx - 1] << 4);
504         if (h_idx)
505                 vouvcr |= (1 << 14) | vou_scale_v_fld[h_idx - 1];
506
507         dev_dbg(vou_dev->v4l2_dev.dev, "%s: scaling 0x%x\n", fmt->desc, vouvcr);
508
509         /* To produce a colour bar for testing set bit 23 of VOUVCR */
510         sh_vou_reg_ab_write(vou_dev, VOUVCR, vouvcr);
511         sh_vou_reg_ab_write(vou_dev, VOUDFR,
512                             fmt->pkf | (fmt->yf << 8) | (fmt->rgb << 16));
513 }
514
515 struct sh_vou_geometry {
516         struct v4l2_rect output;
517         unsigned int in_width;
518         unsigned int in_height;
519         int scale_idx_h;
520         int scale_idx_v;
521 };
522
523 /*
524  * Find input geometry, that we can use to produce output, closest to the
525  * requested rectangle, using VOU scaling
526  */
527 static void vou_adjust_input(struct sh_vou_geometry *geo, v4l2_std_id std)
528 {
529         /* The compiler cannot know, that best and idx will indeed be set */
530         unsigned int best_err = UINT_MAX, best = 0, img_height_max;
531         int i, idx = 0;
532
533         if (std & V4L2_STD_525_60)
534                 img_height_max = 480;
535         else
536                 img_height_max = 576;
537
538         /* Image width must be a multiple of 4 */
539         v4l_bound_align_image(&geo->in_width, 0, VOU_MAX_IMAGE_WIDTH, 2,
540                               &geo->in_height, 0, img_height_max, 1, 0);
541
542         /* Select scales to come as close as possible to the output image */
543         for (i = ARRAY_SIZE(vou_scale_h_num) - 1; i >= 0; i--) {
544                 unsigned int err;
545                 unsigned int found = geo->output.width * vou_scale_h_den[i] /
546                         vou_scale_h_num[i];
547
548                 if (found > VOU_MAX_IMAGE_WIDTH)
549                         /* scales increase */
550                         break;
551
552                 err = abs(found - geo->in_width);
553                 if (err < best_err) {
554                         best_err = err;
555                         idx = i;
556                         best = found;
557                 }
558                 if (!err)
559                         break;
560         }
561
562         geo->in_width = best;
563         geo->scale_idx_h = idx;
564
565         best_err = UINT_MAX;
566
567         /* This loop can be replaced with one division */
568         for (i = ARRAY_SIZE(vou_scale_v_num) - 1; i >= 0; i--) {
569                 unsigned int err;
570                 unsigned int found = geo->output.height * vou_scale_v_den[i] /
571                         vou_scale_v_num[i];
572
573                 if (found > img_height_max)
574                         /* scales increase */
575                         break;
576
577                 err = abs(found - geo->in_height);
578                 if (err < best_err) {
579                         best_err = err;
580                         idx = i;
581                         best = found;
582                 }
583                 if (!err)
584                         break;
585         }
586
587         geo->in_height = best;
588         geo->scale_idx_v = idx;
589 }
590
591 /*
592  * Find output geometry, that we can produce, using VOU scaling, closest to
593  * the requested rectangle
594  */
595 static void vou_adjust_output(struct sh_vou_geometry *geo, v4l2_std_id std)
596 {
597         unsigned int best_err = UINT_MAX, best, width_max, height_max,
598                 img_height_max;
599         int i, idx;
600
601         if (std & V4L2_STD_525_60) {
602                 width_max = 858;
603                 height_max = 262 * 2;
604                 img_height_max = 480;
605         } else {
606                 width_max = 864;
607                 height_max = 312 * 2;
608                 img_height_max = 576;
609         }
610
611         /* Select scales to come as close as possible to the output image */
612         for (i = 0; i < ARRAY_SIZE(vou_scale_h_num); i++) {
613                 unsigned int err;
614                 unsigned int found = geo->in_width * vou_scale_h_num[i] /
615                         vou_scale_h_den[i];
616
617                 if (found > VOU_MAX_IMAGE_WIDTH)
618                         /* scales increase */
619                         break;
620
621                 err = abs(found - geo->output.width);
622                 if (err < best_err) {
623                         best_err = err;
624                         idx = i;
625                         best = found;
626                 }
627                 if (!err)
628                         break;
629         }
630
631         geo->output.width = best;
632         geo->scale_idx_h = idx;
633         if (geo->output.left + best > width_max)
634                 geo->output.left = width_max - best;
635
636         pr_debug("%s(): W %u * %u/%u = %u\n", __func__, geo->in_width,
637                  vou_scale_h_num[idx], vou_scale_h_den[idx], best);
638
639         best_err = UINT_MAX;
640
641         /* This loop can be replaced with one division */
642         for (i = 0; i < ARRAY_SIZE(vou_scale_v_num); i++) {
643                 unsigned int err;
644                 unsigned int found = geo->in_height * vou_scale_v_num[i] /
645                         vou_scale_v_den[i];
646
647                 if (found > img_height_max)
648                         /* scales increase */
649                         break;
650
651                 err = abs(found - geo->output.height);
652                 if (err < best_err) {
653                         best_err = err;
654                         idx = i;
655                         best = found;
656                 }
657                 if (!err)
658                         break;
659         }
660
661         geo->output.height = best;
662         geo->scale_idx_v = idx;
663         if (geo->output.top + best > height_max)
664                 geo->output.top = height_max - best;
665
666         pr_debug("%s(): H %u * %u/%u = %u\n", __func__, geo->in_height,
667                  vou_scale_v_num[idx], vou_scale_v_den[idx], best);
668 }
669
670 static int sh_vou_s_fmt_vid_out(struct file *file, void *priv,
671                                 struct v4l2_format *fmt)
672 {
673         struct video_device *vdev = video_devdata(file);
674         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
675         struct v4l2_pix_format *pix = &fmt->fmt.pix;
676         unsigned int img_height_max;
677         int pix_idx;
678         struct sh_vou_geometry geo;
679         struct v4l2_mbus_framefmt mbfmt = {
680                 /* Revisit: is this the correct code? */
681                 .code = V4L2_MBUS_FMT_YUYV8_2X8,
682                 .field = V4L2_FIELD_INTERLACED,
683                 .colorspace = V4L2_COLORSPACE_SMPTE170M,
684         };
685         int ret;
686
687         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
688                 vou_dev->rect.width, vou_dev->rect.height,
689                 pix->width, pix->height);
690
691         if (pix->field == V4L2_FIELD_ANY)
692                 pix->field = V4L2_FIELD_NONE;
693
694         if (fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
695             pix->field != V4L2_FIELD_NONE)
696                 return -EINVAL;
697
698         for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
699                 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
700                         break;
701
702         if (pix_idx == ARRAY_SIZE(vou_fmt))
703                 return -EINVAL;
704
705         if (vou_dev->std & V4L2_STD_525_60)
706                 img_height_max = 480;
707         else
708                 img_height_max = 576;
709
710         /* Image width must be a multiple of 4 */
711         v4l_bound_align_image(&pix->width, 0, VOU_MAX_IMAGE_WIDTH, 2,
712                               &pix->height, 0, img_height_max, 1, 0);
713
714         geo.in_width = pix->width;
715         geo.in_height = pix->height;
716         geo.output = vou_dev->rect;
717
718         vou_adjust_output(&geo, vou_dev->std);
719
720         mbfmt.width = geo.output.width;
721         mbfmt.height = geo.output.height;
722         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
723                                          s_mbus_fmt, &mbfmt);
724         /* Must be implemented, so, don't check for -ENOIOCTLCMD */
725         if (ret < 0)
726                 return ret;
727
728         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
729                 geo.output.width, geo.output.height, mbfmt.width, mbfmt.height);
730
731         /* Sanity checks */
732         if ((unsigned)mbfmt.width > VOU_MAX_IMAGE_WIDTH ||
733             (unsigned)mbfmt.height > img_height_max ||
734             mbfmt.code != V4L2_MBUS_FMT_YUYV8_2X8)
735                 return -EIO;
736
737         if (mbfmt.width != geo.output.width ||
738             mbfmt.height != geo.output.height) {
739                 geo.output.width = mbfmt.width;
740                 geo.output.height = mbfmt.height;
741
742                 vou_adjust_input(&geo, vou_dev->std);
743         }
744
745         /* We tried to preserve output rectangle, but it could have changed */
746         vou_dev->rect = geo.output;
747         pix->width = geo.in_width;
748         pix->height = geo.in_height;
749
750         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u\n", __func__,
751                 pix->width, pix->height);
752
753         vou_dev->pix_idx = pix_idx;
754
755         vou_dev->pix = *pix;
756
757         sh_vou_configure_geometry(vou_dev, pix_idx,
758                                   geo.scale_idx_h, geo.scale_idx_v);
759
760         return 0;
761 }
762
763 static int sh_vou_try_fmt_vid_out(struct file *file, void *priv,
764                                   struct v4l2_format *fmt)
765 {
766         struct sh_vou_file *vou_file = priv;
767         struct v4l2_pix_format *pix = &fmt->fmt.pix;
768         int i;
769
770         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
771
772         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
773         pix->field = V4L2_FIELD_NONE;
774
775         v4l_bound_align_image(&pix->width, 0, VOU_MAX_IMAGE_WIDTH, 1,
776                               &pix->height, 0, VOU_MAX_IMAGE_HEIGHT, 1, 0);
777
778         for (i = 0; ARRAY_SIZE(vou_fmt); i++)
779                 if (vou_fmt[i].pfmt == pix->pixelformat)
780                         return 0;
781
782         pix->pixelformat = vou_fmt[0].pfmt;
783
784         return 0;
785 }
786
787 static int sh_vou_reqbufs(struct file *file, void *priv,
788                           struct v4l2_requestbuffers *req)
789 {
790         struct sh_vou_file *vou_file = priv;
791
792         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
793
794         if (req->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
795                 return -EINVAL;
796
797         return videobuf_reqbufs(&vou_file->vbq, req);
798 }
799
800 static int sh_vou_querybuf(struct file *file, void *priv,
801                            struct v4l2_buffer *b)
802 {
803         struct sh_vou_file *vou_file = priv;
804
805         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
806
807         return videobuf_querybuf(&vou_file->vbq, b);
808 }
809
810 static int sh_vou_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
811 {
812         struct sh_vou_file *vou_file = priv;
813
814         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
815
816         return videobuf_qbuf(&vou_file->vbq, b);
817 }
818
819 static int sh_vou_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
820 {
821         struct sh_vou_file *vou_file = priv;
822
823         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
824
825         return videobuf_dqbuf(&vou_file->vbq, b, file->f_flags & O_NONBLOCK);
826 }
827
828 static int sh_vou_streamon(struct file *file, void *priv,
829                            enum v4l2_buf_type buftype)
830 {
831         struct video_device *vdev = video_devdata(file);
832         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
833         struct sh_vou_file *vou_file = priv;
834         int ret;
835
836         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
837
838         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
839                                          video, s_stream, 1);
840         if (ret < 0 && ret != -ENOIOCTLCMD)
841                 return ret;
842
843         /* This calls our .buf_queue() (== sh_vou_buf_queue) */
844         return videobuf_streamon(&vou_file->vbq);
845 }
846
847 static int sh_vou_streamoff(struct file *file, void *priv,
848                             enum v4l2_buf_type buftype)
849 {
850         struct video_device *vdev = video_devdata(file);
851         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
852         struct sh_vou_file *vou_file = priv;
853
854         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
855
856         /*
857          * This calls buf_release from host driver's videobuf_queue_ops for all
858          * remaining buffers. When the last buffer is freed, stop streaming
859          */
860         videobuf_streamoff(&vou_file->vbq);
861         v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video, s_stream, 0);
862
863         return 0;
864 }
865
866 static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)
867 {
868         switch (bus_fmt) {
869         default:
870                 pr_warning("%s(): Invalid bus-format code %d, using default 8-bit\n",
871                            __func__, bus_fmt);
872         case SH_VOU_BUS_8BIT:
873                 return 1;
874         case SH_VOU_BUS_16BIT:
875                 return 0;
876         case SH_VOU_BUS_BT656:
877                 return 3;
878         }
879 }
880
881 static int sh_vou_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
882 {
883         struct video_device *vdev = video_devdata(file);
884         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
885         int ret;
886
887         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): 0x%llx\n", __func__, *std_id);
888
889         if (*std_id & ~vdev->tvnorms)
890                 return -EINVAL;
891
892         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
893                                          s_std_output, *std_id);
894         /* Shall we continue, if the subdev doesn't support .s_std_output()? */
895         if (ret < 0 && ret != -ENOIOCTLCMD)
896                 return ret;
897
898         if (*std_id & V4L2_STD_525_60)
899                 sh_vou_reg_ab_set(vou_dev, VOUCR,
900                         sh_vou_ntsc_mode(vou_dev->pdata->bus_fmt) << 29, 7 << 29);
901         else
902                 sh_vou_reg_ab_set(vou_dev, VOUCR, 5 << 29, 7 << 29);
903
904         vou_dev->std = *std_id;
905
906         return 0;
907 }
908
909 static int sh_vou_g_std(struct file *file, void *priv, v4l2_std_id *std)
910 {
911         struct video_device *vdev = video_devdata(file);
912         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
913
914         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
915
916         *std = vou_dev->std;
917
918         return 0;
919 }
920
921 static int sh_vou_g_crop(struct file *file, void *fh, struct v4l2_crop *a)
922 {
923         struct video_device *vdev = video_devdata(file);
924         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
925
926         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
927
928         a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
929         a->c = vou_dev->rect;
930
931         return 0;
932 }
933
934 /* Assume a dull encoder, do all the work ourselves. */
935 static int sh_vou_s_crop(struct file *file, void *fh, struct v4l2_crop *a)
936 {
937         struct video_device *vdev = video_devdata(file);
938         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
939         struct v4l2_rect *rect = &a->c;
940         struct v4l2_crop sd_crop = {.type = V4L2_BUF_TYPE_VIDEO_OUTPUT};
941         struct v4l2_pix_format *pix = &vou_dev->pix;
942         struct sh_vou_geometry geo;
943         struct v4l2_mbus_framefmt mbfmt = {
944                 /* Revisit: is this the correct code? */
945                 .code = V4L2_MBUS_FMT_YUYV8_2X8,
946                 .field = V4L2_FIELD_INTERLACED,
947                 .colorspace = V4L2_COLORSPACE_SMPTE170M,
948         };
949         unsigned int img_height_max;
950         int ret;
951
952         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u@%u:%u\n", __func__,
953                 rect->width, rect->height, rect->left, rect->top);
954
955         if (a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
956                 return -EINVAL;
957
958         if (vou_dev->std & V4L2_STD_525_60)
959                 img_height_max = 480;
960         else
961                 img_height_max = 576;
962
963         v4l_bound_align_image(&rect->width, 0, VOU_MAX_IMAGE_WIDTH, 1,
964                               &rect->height, 0, img_height_max, 1, 0);
965
966         if (rect->width + rect->left > VOU_MAX_IMAGE_WIDTH)
967                 rect->left = VOU_MAX_IMAGE_WIDTH - rect->width;
968
969         if (rect->height + rect->top > img_height_max)
970                 rect->top = img_height_max - rect->height;
971
972         geo.output = *rect;
973         geo.in_width = pix->width;
974         geo.in_height = pix->height;
975
976         /* Configure the encoder one-to-one, position at 0, ignore errors */
977         sd_crop.c.width = geo.output.width;
978         sd_crop.c.height = geo.output.height;
979         /*
980          * We first issue a S_CROP, so that the subsequent S_FMT delivers the
981          * final encoder configuration.
982          */
983         v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
984                                    s_crop, &sd_crop);
985         mbfmt.width = geo.output.width;
986         mbfmt.height = geo.output.height;
987         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
988                                          s_mbus_fmt, &mbfmt);
989         /* Must be implemented, so, don't check for -ENOIOCTLCMD */
990         if (ret < 0)
991                 return ret;
992
993         /* Sanity checks */
994         if ((unsigned)mbfmt.width > VOU_MAX_IMAGE_WIDTH ||
995             (unsigned)mbfmt.height > img_height_max ||
996             mbfmt.code != V4L2_MBUS_FMT_YUYV8_2X8)
997                 return -EIO;
998
999         geo.output.width = mbfmt.width;
1000         geo.output.height = mbfmt.height;
1001
1002         /*
1003          * No down-scaling. According to the API, current call has precedence:
1004          * http://v4l2spec.bytesex.org/spec/x1904.htm#AEN1954 paragraph two.
1005          */
1006         vou_adjust_input(&geo, vou_dev->std);
1007
1008         /* We tried to preserve output rectangle, but it could have changed */
1009         vou_dev->rect = geo.output;
1010         pix->width = geo.in_width;
1011         pix->height = geo.in_height;
1012
1013         sh_vou_configure_geometry(vou_dev, vou_dev->pix_idx,
1014                                   geo.scale_idx_h, geo.scale_idx_v);
1015
1016         return 0;
1017 }
1018
1019 /*
1020  * Total field: NTSC 858 x 2 * 262/263, PAL 864 x 2 * 312/313, default rectangle
1021  * is the initial register values, height takes the interlaced format into
1022  * account. The actual image can only go up to 720 x 2 * 240, So, VOUVPR can
1023  * actually only meaningfully contain values <= 720 and <= 240 respectively, and
1024  * not <= 864 and <= 312.
1025  */
1026 static int sh_vou_cropcap(struct file *file, void *priv,
1027                           struct v4l2_cropcap *a)
1028 {
1029         struct sh_vou_file *vou_file = priv;
1030
1031         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1032
1033         a->type                         = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1034         a->bounds.left                  = 0;
1035         a->bounds.top                   = 0;
1036         a->bounds.width                 = VOU_MAX_IMAGE_WIDTH;
1037         a->bounds.height                = VOU_MAX_IMAGE_HEIGHT;
1038         /* Default = max, set VOUDPR = 0, which is not hardware default */
1039         a->defrect.left                 = 0;
1040         a->defrect.top                  = 0;
1041         a->defrect.width                = VOU_MAX_IMAGE_WIDTH;
1042         a->defrect.height               = VOU_MAX_IMAGE_HEIGHT;
1043         a->pixelaspect.numerator        = 1;
1044         a->pixelaspect.denominator      = 1;
1045
1046         return 0;
1047 }
1048
1049 static irqreturn_t sh_vou_isr(int irq, void *dev_id)
1050 {
1051         struct sh_vou_device *vou_dev = dev_id;
1052         static unsigned long j;
1053         struct videobuf_buffer *vb;
1054         static int cnt;
1055         static int side;
1056         u32 irq_status = sh_vou_reg_a_read(vou_dev, VOUIR), masked;
1057         u32 vou_status = sh_vou_reg_a_read(vou_dev, VOUSTR);
1058
1059         if (!(irq_status & 0x300)) {
1060                 if (printk_timed_ratelimit(&j, 500))
1061                         dev_warn(vou_dev->v4l2_dev.dev, "IRQ status 0x%x!\n",
1062                                  irq_status);
1063                 return IRQ_NONE;
1064         }
1065
1066         spin_lock(&vou_dev->lock);
1067         if (!vou_dev->active || list_empty(&vou_dev->queue)) {
1068                 if (printk_timed_ratelimit(&j, 500))
1069                         dev_warn(vou_dev->v4l2_dev.dev,
1070                                  "IRQ without active buffer: %x!\n", irq_status);
1071                 /* Just ack: buf_release will disable further interrupts */
1072                 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x300);
1073                 spin_unlock(&vou_dev->lock);
1074                 return IRQ_HANDLED;
1075         }
1076
1077         masked = ~(0x300 & irq_status) & irq_status & 0x30304;
1078         dev_dbg(vou_dev->v4l2_dev.dev,
1079                 "IRQ status 0x%x -> 0x%x, VOU status 0x%x, cnt %d\n",
1080                 irq_status, masked, vou_status, cnt);
1081
1082         cnt++;
1083         side = vou_status & 0x10000;
1084
1085         /* Clear only set interrupts */
1086         sh_vou_reg_a_write(vou_dev, VOUIR, masked);
1087
1088         vb = vou_dev->active;
1089         list_del(&vb->queue);
1090
1091         vb->state = VIDEOBUF_DONE;
1092         do_gettimeofday(&vb->ts);
1093         vb->field_count++;
1094         wake_up(&vb->done);
1095
1096         if (list_empty(&vou_dev->queue)) {
1097                 /* Stop VOU */
1098                 dev_dbg(vou_dev->v4l2_dev.dev, "%s: queue empty after %d\n",
1099                         __func__, cnt);
1100                 sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
1101                 vou_dev->active = NULL;
1102                 vou_dev->status = SH_VOU_INITIALISING;
1103                 /* Disable End-of-Frame (VSYNC) interrupts */
1104                 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
1105                 spin_unlock(&vou_dev->lock);
1106                 return IRQ_HANDLED;
1107         }
1108
1109         vou_dev->active = list_entry(vou_dev->queue.next,
1110                                      struct videobuf_buffer, queue);
1111
1112         if (vou_dev->active->queue.next != &vou_dev->queue) {
1113                 struct videobuf_buffer *new = list_entry(vou_dev->active->queue.next,
1114                                                 struct videobuf_buffer, queue);
1115                 sh_vou_schedule_next(vou_dev, new);
1116         }
1117
1118         spin_unlock(&vou_dev->lock);
1119
1120         return IRQ_HANDLED;
1121 }
1122
1123 static int sh_vou_hw_init(struct sh_vou_device *vou_dev)
1124 {
1125         struct sh_vou_pdata *pdata = vou_dev->pdata;
1126         u32 voucr = sh_vou_ntsc_mode(pdata->bus_fmt) << 29;
1127         int i = 100;
1128
1129         /* Disable all IRQs */
1130         sh_vou_reg_a_write(vou_dev, VOUIR, 0);
1131
1132         /* Reset VOU interfaces - registers unaffected */
1133         sh_vou_reg_a_write(vou_dev, VOUSRR, 0x101);
1134         while (--i && (sh_vou_reg_a_read(vou_dev, VOUSRR) & 0x101))
1135                 udelay(1);
1136
1137         if (!i)
1138                 return -ETIMEDOUT;
1139
1140         dev_dbg(vou_dev->v4l2_dev.dev, "Reset took %dus\n", 100 - i);
1141
1142         if (pdata->flags & SH_VOU_PCLK_FALLING)
1143                 voucr |= 1 << 28;
1144         if (pdata->flags & SH_VOU_HSYNC_LOW)
1145                 voucr |= 1 << 27;
1146         if (pdata->flags & SH_VOU_VSYNC_LOW)
1147                 voucr |= 1 << 26;
1148         sh_vou_reg_ab_set(vou_dev, VOUCR, voucr, 0xfc000000);
1149
1150         /* Manual register side switching at first */
1151         sh_vou_reg_a_write(vou_dev, VOURCR, 4);
1152         /* Default - fixed HSYNC length, can be made configurable is required */
1153         sh_vou_reg_ab_write(vou_dev, VOUMSR, 0x800000);
1154
1155         return 0;
1156 }
1157
1158 /* File operations */
1159 static int sh_vou_open(struct file *file)
1160 {
1161         struct video_device *vdev = video_devdata(file);
1162         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1163         struct sh_vou_file *vou_file = kzalloc(sizeof(struct sh_vou_file),
1164                                                GFP_KERNEL);
1165
1166         if (!vou_file)
1167                 return -ENOMEM;
1168
1169         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
1170
1171         file->private_data = vou_file;
1172
1173         if (atomic_inc_return(&vou_dev->use_count) == 1) {
1174                 int ret;
1175                 /* First open */
1176                 vou_dev->status = SH_VOU_INITIALISING;
1177                 pm_runtime_get_sync(vdev->v4l2_dev->dev);
1178                 ret = sh_vou_hw_init(vou_dev);
1179                 if (ret < 0) {
1180                         atomic_dec(&vou_dev->use_count);
1181                         pm_runtime_put(vdev->v4l2_dev->dev);
1182                         vou_dev->status = SH_VOU_IDLE;
1183                         return ret;
1184                 }
1185         }
1186
1187         videobuf_queue_dma_contig_init(&vou_file->vbq, &sh_vou_video_qops,
1188                                        vou_dev->v4l2_dev.dev, &vou_dev->lock,
1189                                        V4L2_BUF_TYPE_VIDEO_OUTPUT,
1190                                        V4L2_FIELD_NONE,
1191                                        sizeof(struct videobuf_buffer), vdev,
1192                                        &vou_dev->fop_lock);
1193
1194         return 0;
1195 }
1196
1197 static int sh_vou_release(struct file *file)
1198 {
1199         struct video_device *vdev = video_devdata(file);
1200         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1201         struct sh_vou_file *vou_file = file->private_data;
1202
1203         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1204
1205         if (!atomic_dec_return(&vou_dev->use_count)) {
1206                 /* Last close */
1207                 vou_dev->status = SH_VOU_IDLE;
1208                 sh_vou_reg_a_set(vou_dev, VOUER, 0, 0x101);
1209                 pm_runtime_put(vdev->v4l2_dev->dev);
1210         }
1211
1212         file->private_data = NULL;
1213         kfree(vou_file);
1214
1215         return 0;
1216 }
1217
1218 static int sh_vou_mmap(struct file *file, struct vm_area_struct *vma)
1219 {
1220         struct sh_vou_file *vou_file = file->private_data;
1221
1222         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1223
1224         return videobuf_mmap_mapper(&vou_file->vbq, vma);
1225 }
1226
1227 static unsigned int sh_vou_poll(struct file *file, poll_table *wait)
1228 {
1229         struct sh_vou_file *vou_file = file->private_data;
1230
1231         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1232
1233         return videobuf_poll_stream(file, &vou_file->vbq, wait);
1234 }
1235
1236 static int sh_vou_g_chip_ident(struct file *file, void *fh,
1237                                    struct v4l2_dbg_chip_ident *id)
1238 {
1239         struct video_device *vdev = video_devdata(file);
1240         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1241
1242         return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, g_chip_ident, id);
1243 }
1244
1245 #ifdef CONFIG_VIDEO_ADV_DEBUG
1246 static int sh_vou_g_register(struct file *file, void *fh,
1247                                  struct v4l2_dbg_register *reg)
1248 {
1249         struct video_device *vdev = video_devdata(file);
1250         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1251
1252         return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, g_register, reg);
1253 }
1254
1255 static int sh_vou_s_register(struct file *file, void *fh,
1256                                  struct v4l2_dbg_register *reg)
1257 {
1258         struct video_device *vdev = video_devdata(file);
1259         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1260
1261         return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, s_register, reg);
1262 }
1263 #endif
1264
1265 /* sh_vou display ioctl operations */
1266 static const struct v4l2_ioctl_ops sh_vou_ioctl_ops = {
1267         .vidioc_querycap                = sh_vou_querycap,
1268         .vidioc_enum_fmt_vid_out        = sh_vou_enum_fmt_vid_out,
1269         .vidioc_g_fmt_vid_out           = sh_vou_g_fmt_vid_out,
1270         .vidioc_s_fmt_vid_out           = sh_vou_s_fmt_vid_out,
1271         .vidioc_try_fmt_vid_out         = sh_vou_try_fmt_vid_out,
1272         .vidioc_reqbufs                 = sh_vou_reqbufs,
1273         .vidioc_querybuf                = sh_vou_querybuf,
1274         .vidioc_qbuf                    = sh_vou_qbuf,
1275         .vidioc_dqbuf                   = sh_vou_dqbuf,
1276         .vidioc_streamon                = sh_vou_streamon,
1277         .vidioc_streamoff               = sh_vou_streamoff,
1278         .vidioc_s_std                   = sh_vou_s_std,
1279         .vidioc_g_std                   = sh_vou_g_std,
1280         .vidioc_cropcap                 = sh_vou_cropcap,
1281         .vidioc_g_crop                  = sh_vou_g_crop,
1282         .vidioc_s_crop                  = sh_vou_s_crop,
1283         .vidioc_g_chip_ident            = sh_vou_g_chip_ident,
1284 #ifdef CONFIG_VIDEO_ADV_DEBUG
1285         .vidioc_g_register              = sh_vou_g_register,
1286         .vidioc_s_register              = sh_vou_s_register,
1287 #endif
1288 };
1289
1290 static const struct v4l2_file_operations sh_vou_fops = {
1291         .owner          = THIS_MODULE,
1292         .open           = sh_vou_open,
1293         .release        = sh_vou_release,
1294         .unlocked_ioctl = video_ioctl2,
1295         .mmap           = sh_vou_mmap,
1296         .poll           = sh_vou_poll,
1297 };
1298
1299 static const struct video_device sh_vou_video_template = {
1300         .name           = "sh_vou",
1301         .fops           = &sh_vou_fops,
1302         .ioctl_ops      = &sh_vou_ioctl_ops,
1303         .tvnorms        = V4L2_STD_525_60, /* PAL only supported in 8-bit non-bt656 mode */
1304         .current_norm   = V4L2_STD_NTSC_M,
1305 };
1306
1307 static int __devinit sh_vou_probe(struct platform_device *pdev)
1308 {
1309         struct sh_vou_pdata *vou_pdata = pdev->dev.platform_data;
1310         struct v4l2_rect *rect;
1311         struct v4l2_pix_format *pix;
1312         struct i2c_adapter *i2c_adap;
1313         struct video_device *vdev;
1314         struct sh_vou_device *vou_dev;
1315         struct resource *reg_res, *region;
1316         struct v4l2_subdev *subdev;
1317         int irq, ret;
1318
1319         reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1320         irq = platform_get_irq(pdev, 0);
1321
1322         if (!vou_pdata || !reg_res || irq <= 0) {
1323                 dev_err(&pdev->dev, "Insufficient VOU platform information.\n");
1324                 return -ENODEV;
1325         }
1326
1327         vou_dev = kzalloc(sizeof(*vou_dev), GFP_KERNEL);
1328         if (!vou_dev)
1329                 return -ENOMEM;
1330
1331         INIT_LIST_HEAD(&vou_dev->queue);
1332         spin_lock_init(&vou_dev->lock);
1333         mutex_init(&vou_dev->fop_lock);
1334         atomic_set(&vou_dev->use_count, 0);
1335         vou_dev->pdata = vou_pdata;
1336         vou_dev->status = SH_VOU_IDLE;
1337
1338         rect = &vou_dev->rect;
1339         pix = &vou_dev->pix;
1340
1341         /* Fill in defaults */
1342         vou_dev->std            = sh_vou_video_template.current_norm;
1343         rect->left              = 0;
1344         rect->top               = 0;
1345         rect->width             = VOU_MAX_IMAGE_WIDTH;
1346         rect->height            = 480;
1347         pix->width              = VOU_MAX_IMAGE_WIDTH;
1348         pix->height             = 480;
1349         pix->pixelformat        = V4L2_PIX_FMT_YVYU;
1350         pix->field              = V4L2_FIELD_NONE;
1351         pix->bytesperline       = VOU_MAX_IMAGE_WIDTH * 2;
1352         pix->sizeimage          = VOU_MAX_IMAGE_WIDTH * 2 * 480;
1353         pix->colorspace         = V4L2_COLORSPACE_SMPTE170M;
1354
1355         region = request_mem_region(reg_res->start, resource_size(reg_res),
1356                                     pdev->name);
1357         if (!region) {
1358                 dev_err(&pdev->dev, "VOU region already claimed\n");
1359                 ret = -EBUSY;
1360                 goto ereqmemreg;
1361         }
1362
1363         vou_dev->base = ioremap(reg_res->start, resource_size(reg_res));
1364         if (!vou_dev->base) {
1365                 ret = -ENOMEM;
1366                 goto emap;
1367         }
1368
1369         ret = request_irq(irq, sh_vou_isr, 0, "vou", vou_dev);
1370         if (ret < 0)
1371                 goto ereqirq;
1372
1373         ret = v4l2_device_register(&pdev->dev, &vou_dev->v4l2_dev);
1374         if (ret < 0) {
1375                 dev_err(&pdev->dev, "Error registering v4l2 device\n");
1376                 goto ev4l2devreg;
1377         }
1378
1379         /* Allocate memory for video device */
1380         vdev = video_device_alloc();
1381         if (vdev == NULL) {
1382                 ret = -ENOMEM;
1383                 goto evdevalloc;
1384         }
1385
1386         *vdev = sh_vou_video_template;
1387         if (vou_pdata->bus_fmt == SH_VOU_BUS_8BIT)
1388                 vdev->tvnorms |= V4L2_STD_PAL;
1389         vdev->v4l2_dev = &vou_dev->v4l2_dev;
1390         vdev->release = video_device_release;
1391         vdev->lock = &vou_dev->fop_lock;
1392
1393         vou_dev->vdev = vdev;
1394         video_set_drvdata(vdev, vou_dev);
1395
1396         pm_runtime_enable(&pdev->dev);
1397         pm_runtime_resume(&pdev->dev);
1398
1399         i2c_adap = i2c_get_adapter(vou_pdata->i2c_adap);
1400         if (!i2c_adap) {
1401                 ret = -ENODEV;
1402                 goto ei2cgadap;
1403         }
1404
1405         ret = sh_vou_hw_init(vou_dev);
1406         if (ret < 0)
1407                 goto ereset;
1408
1409         subdev = v4l2_i2c_new_subdev_board(&vou_dev->v4l2_dev, i2c_adap,
1410                         vou_pdata->board_info, NULL);
1411         if (!subdev) {
1412                 ret = -ENOMEM;
1413                 goto ei2cnd;
1414         }
1415
1416         ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1417         if (ret < 0)
1418                 goto evregdev;
1419
1420         return 0;
1421
1422 evregdev:
1423 ei2cnd:
1424 ereset:
1425         i2c_put_adapter(i2c_adap);
1426 ei2cgadap:
1427         video_device_release(vdev);
1428         pm_runtime_disable(&pdev->dev);
1429 evdevalloc:
1430         v4l2_device_unregister(&vou_dev->v4l2_dev);
1431 ev4l2devreg:
1432         free_irq(irq, vou_dev);
1433 ereqirq:
1434         iounmap(vou_dev->base);
1435 emap:
1436         release_mem_region(reg_res->start, resource_size(reg_res));
1437 ereqmemreg:
1438         kfree(vou_dev);
1439         return ret;
1440 }
1441
1442 static int __devexit sh_vou_remove(struct platform_device *pdev)
1443 {
1444         int irq = platform_get_irq(pdev, 0);
1445         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1446         struct sh_vou_device *vou_dev = container_of(v4l2_dev,
1447                                                 struct sh_vou_device, v4l2_dev);
1448         struct v4l2_subdev *sd = list_entry(v4l2_dev->subdevs.next,
1449                                             struct v4l2_subdev, list);
1450         struct i2c_client *client = v4l2_get_subdevdata(sd);
1451         struct resource *reg_res;
1452
1453         if (irq > 0)
1454                 free_irq(irq, vou_dev);
1455         pm_runtime_disable(&pdev->dev);
1456         video_unregister_device(vou_dev->vdev);
1457         i2c_put_adapter(client->adapter);
1458         v4l2_device_unregister(&vou_dev->v4l2_dev);
1459         iounmap(vou_dev->base);
1460         reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1461         if (reg_res)
1462                 release_mem_region(reg_res->start, resource_size(reg_res));
1463         kfree(vou_dev);
1464         return 0;
1465 }
1466
1467 static struct platform_driver __refdata sh_vou = {
1468         .remove  = __devexit_p(sh_vou_remove),
1469         .driver  = {
1470                 .name   = "sh-vou",
1471                 .owner  = THIS_MODULE,
1472         },
1473 };
1474
1475 static int __init sh_vou_init(void)
1476 {
1477         return platform_driver_probe(&sh_vou, sh_vou_probe);
1478 }
1479
1480 static void __exit sh_vou_exit(void)
1481 {
1482         platform_driver_unregister(&sh_vou);
1483 }
1484
1485 module_init(sh_vou_init);
1486 module_exit(sh_vou_exit);
1487
1488 MODULE_DESCRIPTION("SuperH VOU driver");
1489 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1490 MODULE_LICENSE("GPL v2");
1491 MODULE_VERSION("0.1.0");
1492 MODULE_ALIAS("platform:sh-vou");