Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6
[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/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 };
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 vq->vb_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 vq->vb_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 vq->vb_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->version = KERNEL_VERSION(0, 1, 0);
396         cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
397         return 0;
398 }
399
400 /* Enumerate formats, that the device can accept from the user */
401 static int sh_vou_enum_fmt_vid_out(struct file *file, void  *priv,
402                                    struct v4l2_fmtdesc *fmt)
403 {
404         struct sh_vou_file *vou_file = priv;
405
406         if (fmt->index >= ARRAY_SIZE(vou_fmt))
407                 return -EINVAL;
408
409         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
410
411         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
412         strlcpy(fmt->description, vou_fmt[fmt->index].desc,
413                 sizeof(fmt->description));
414         fmt->pixelformat = vou_fmt[fmt->index].pfmt;
415
416         return 0;
417 }
418
419 static int sh_vou_g_fmt_vid_out(struct file *file, void *priv,
420                                 struct v4l2_format *fmt)
421 {
422         struct video_device *vdev = video_devdata(file);
423         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
424
425         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
426
427         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
428         fmt->fmt.pix = vou_dev->pix;
429
430         return 0;
431 }
432
433 static const unsigned char vou_scale_h_num[] = {1, 9, 2, 9, 4};
434 static const unsigned char vou_scale_h_den[] = {1, 8, 1, 4, 1};
435 static const unsigned char vou_scale_h_fld[] = {0, 2, 1, 3};
436 static const unsigned char vou_scale_v_num[] = {1, 2, 4};
437 static const unsigned char vou_scale_v_den[] = {1, 1, 1};
438 static const unsigned char vou_scale_v_fld[] = {0, 1};
439
440 static void sh_vou_configure_geometry(struct sh_vou_device *vou_dev,
441                                       int pix_idx, int w_idx, int h_idx)
442 {
443         struct sh_vou_fmt *fmt = vou_fmt + pix_idx;
444         unsigned int black_left, black_top, width_max, height_max,
445                 frame_in_height, frame_out_height, frame_out_top;
446         struct v4l2_rect *rect = &vou_dev->rect;
447         struct v4l2_pix_format *pix = &vou_dev->pix;
448         u32 vouvcr = 0, dsr_h, dsr_v;
449
450         if (vou_dev->std & V4L2_STD_525_60) {
451                 width_max = 858;
452                 height_max = 262;
453         } else {
454                 width_max = 864;
455                 height_max = 312;
456         }
457
458         frame_in_height = pix->height / 2;
459         frame_out_height = rect->height / 2;
460         frame_out_top = rect->top / 2;
461
462         /*
463          * Cropping scheme: max useful image is 720x480, and the total video
464          * area is 858x525 (NTSC) or 864x625 (PAL). AK8813 / 8814 starts
465          * sampling data beginning with fixed 276th (NTSC) / 288th (PAL) clock,
466          * of which the first 33 / 25 clocks HSYNC must be held active. This
467          * has to be configured in CR[HW]. 1 pixel equals 2 clock periods.
468          * This gives CR[HW] = 16 / 12, VPR[HVP] = 138 / 144, which gives
469          * exactly 858 - 138 = 864 - 144 = 720! We call the out-of-display area,
470          * beyond DSR, specified on the left and top by the VPR register "black
471          * pixels" and out-of-image area (DPR) "background pixels." We fix VPR
472          * at 138 / 144 : 20, because that's the HSYNC timing, that our first
473          * client requires, and that's exactly what leaves us 720 pixels for the
474          * image; we leave VPR[VVP] at default 20 for now, because the client
475          * doesn't seem to have any special requirements for it. Otherwise we
476          * could also set it to max - 240 = 22 / 72. Thus VPR depends only on
477          * the selected standard, and DPR and DSR are selected according to
478          * cropping. Q: how does the client detect the first valid line? Does
479          * HSYNC stay inactive during invalid (black) lines?
480          */
481         black_left = width_max - VOU_MAX_IMAGE_WIDTH;
482         black_top = 20;
483
484         dsr_h = rect->width + rect->left;
485         dsr_v = frame_out_height + frame_out_top;
486
487         dev_dbg(vou_dev->v4l2_dev.dev,
488                 "image %ux%u, black %u:%u, offset %u:%u, display %ux%u\n",
489                 pix->width, frame_in_height, black_left, black_top,
490                 rect->left, frame_out_top, dsr_h, dsr_v);
491
492         /* VOUISR height - half of a frame height in frame mode */
493         sh_vou_reg_ab_write(vou_dev, VOUISR, (pix->width << 16) | frame_in_height);
494         sh_vou_reg_ab_write(vou_dev, VOUVPR, (black_left << 16) | black_top);
495         sh_vou_reg_ab_write(vou_dev, VOUDPR, (rect->left << 16) | frame_out_top);
496         sh_vou_reg_ab_write(vou_dev, VOUDSR, (dsr_h << 16) | dsr_v);
497
498         /*
499          * if necessary, we could set VOUHIR to
500          * max(black_left + dsr_h, width_max) here
501          */
502
503         if (w_idx)
504                 vouvcr |= (1 << 15) | (vou_scale_h_fld[w_idx - 1] << 4);
505         if (h_idx)
506                 vouvcr |= (1 << 14) | vou_scale_v_fld[h_idx - 1];
507
508         dev_dbg(vou_dev->v4l2_dev.dev, "%s: scaling 0x%x\n", fmt->desc, vouvcr);
509
510         /* To produce a colour bar for testing set bit 23 of VOUVCR */
511         sh_vou_reg_ab_write(vou_dev, VOUVCR, vouvcr);
512         sh_vou_reg_ab_write(vou_dev, VOUDFR,
513                             fmt->pkf | (fmt->yf << 8) | (fmt->rgb << 16));
514 }
515
516 struct sh_vou_geometry {
517         struct v4l2_rect output;
518         unsigned int in_width;
519         unsigned int in_height;
520         int scale_idx_h;
521         int scale_idx_v;
522 };
523
524 /*
525  * Find input geometry, that we can use to produce output, closest to the
526  * requested rectangle, using VOU scaling
527  */
528 static void vou_adjust_input(struct sh_vou_geometry *geo, v4l2_std_id std)
529 {
530         /* The compiler cannot know, that best and idx will indeed be set */
531         unsigned int best_err = UINT_MAX, best = 0, img_height_max;
532         int i, idx = 0;
533
534         if (std & V4L2_STD_525_60)
535                 img_height_max = 480;
536         else
537                 img_height_max = 576;
538
539         /* Image width must be a multiple of 4 */
540         v4l_bound_align_image(&geo->in_width, 0, VOU_MAX_IMAGE_WIDTH, 2,
541                               &geo->in_height, 0, img_height_max, 1, 0);
542
543         /* Select scales to come as close as possible to the output image */
544         for (i = ARRAY_SIZE(vou_scale_h_num) - 1; i >= 0; i--) {
545                 unsigned int err;
546                 unsigned int found = geo->output.width * vou_scale_h_den[i] /
547                         vou_scale_h_num[i];
548
549                 if (found > VOU_MAX_IMAGE_WIDTH)
550                         /* scales increase */
551                         break;
552
553                 err = abs(found - geo->in_width);
554                 if (err < best_err) {
555                         best_err = err;
556                         idx = i;
557                         best = found;
558                 }
559                 if (!err)
560                         break;
561         }
562
563         geo->in_width = best;
564         geo->scale_idx_h = idx;
565
566         best_err = UINT_MAX;
567
568         /* This loop can be replaced with one division */
569         for (i = ARRAY_SIZE(vou_scale_v_num) - 1; i >= 0; i--) {
570                 unsigned int err;
571                 unsigned int found = geo->output.height * vou_scale_v_den[i] /
572                         vou_scale_v_num[i];
573
574                 if (found > img_height_max)
575                         /* scales increase */
576                         break;
577
578                 err = abs(found - geo->in_height);
579                 if (err < best_err) {
580                         best_err = err;
581                         idx = i;
582                         best = found;
583                 }
584                 if (!err)
585                         break;
586         }
587
588         geo->in_height = best;
589         geo->scale_idx_v = idx;
590 }
591
592 /*
593  * Find output geometry, that we can produce, using VOU scaling, closest to
594  * the requested rectangle
595  */
596 static void vou_adjust_output(struct sh_vou_geometry *geo, v4l2_std_id std)
597 {
598         unsigned int best_err = UINT_MAX, best, width_max, height_max,
599                 img_height_max;
600         int i, idx;
601
602         if (std & V4L2_STD_525_60) {
603                 width_max = 858;
604                 height_max = 262 * 2;
605                 img_height_max = 480;
606         } else {
607                 width_max = 864;
608                 height_max = 312 * 2;
609                 img_height_max = 576;
610         }
611
612         /* Select scales to come as close as possible to the output image */
613         for (i = 0; i < ARRAY_SIZE(vou_scale_h_num); i++) {
614                 unsigned int err;
615                 unsigned int found = geo->in_width * vou_scale_h_num[i] /
616                         vou_scale_h_den[i];
617
618                 if (found > VOU_MAX_IMAGE_WIDTH)
619                         /* scales increase */
620                         break;
621
622                 err = abs(found - geo->output.width);
623                 if (err < best_err) {
624                         best_err = err;
625                         idx = i;
626                         best = found;
627                 }
628                 if (!err)
629                         break;
630         }
631
632         geo->output.width = best;
633         geo->scale_idx_h = idx;
634         if (geo->output.left + best > width_max)
635                 geo->output.left = width_max - best;
636
637         pr_debug("%s(): W %u * %u/%u = %u\n", __func__, geo->in_width,
638                  vou_scale_h_num[idx], vou_scale_h_den[idx], best);
639
640         best_err = UINT_MAX;
641
642         /* This loop can be replaced with one division */
643         for (i = 0; i < ARRAY_SIZE(vou_scale_v_num); i++) {
644                 unsigned int err;
645                 unsigned int found = geo->in_height * vou_scale_v_num[i] /
646                         vou_scale_v_den[i];
647
648                 if (found > img_height_max)
649                         /* scales increase */
650                         break;
651
652                 err = abs(found - geo->output.height);
653                 if (err < best_err) {
654                         best_err = err;
655                         idx = i;
656                         best = found;
657                 }
658                 if (!err)
659                         break;
660         }
661
662         geo->output.height = best;
663         geo->scale_idx_v = idx;
664         if (geo->output.top + best > height_max)
665                 geo->output.top = height_max - best;
666
667         pr_debug("%s(): H %u * %u/%u = %u\n", __func__, geo->in_height,
668                  vou_scale_v_num[idx], vou_scale_v_den[idx], best);
669 }
670
671 static int sh_vou_s_fmt_vid_out(struct file *file, void *priv,
672                                 struct v4l2_format *fmt)
673 {
674         struct video_device *vdev = video_devdata(file);
675         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
676         struct v4l2_pix_format *pix = &fmt->fmt.pix;
677         unsigned int img_height_max;
678         int pix_idx;
679         struct sh_vou_geometry geo;
680         struct v4l2_mbus_framefmt mbfmt = {
681                 /* Revisit: is this the correct code? */
682                 .code = V4L2_MBUS_FMT_YUYV8_2X8,
683                 .field = V4L2_FIELD_INTERLACED,
684                 .colorspace = V4L2_COLORSPACE_SMPTE170M,
685         };
686         int ret;
687
688         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
689                 vou_dev->rect.width, vou_dev->rect.height,
690                 pix->width, pix->height);
691
692         if (pix->field == V4L2_FIELD_ANY)
693                 pix->field = V4L2_FIELD_NONE;
694
695         if (fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
696             pix->field != V4L2_FIELD_NONE)
697                 return -EINVAL;
698
699         for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
700                 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
701                         break;
702
703         if (pix_idx == ARRAY_SIZE(vou_fmt))
704                 return -EINVAL;
705
706         if (vou_dev->std & V4L2_STD_525_60)
707                 img_height_max = 480;
708         else
709                 img_height_max = 576;
710
711         /* Image width must be a multiple of 4 */
712         v4l_bound_align_image(&pix->width, 0, VOU_MAX_IMAGE_WIDTH, 2,
713                               &pix->height, 0, img_height_max, 1, 0);
714
715         geo.in_width = pix->width;
716         geo.in_height = pix->height;
717         geo.output = vou_dev->rect;
718
719         vou_adjust_output(&geo, vou_dev->std);
720
721         mbfmt.width = geo.output.width;
722         mbfmt.height = geo.output.height;
723         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
724                                          s_mbus_fmt, &mbfmt);
725         /* Must be implemented, so, don't check for -ENOIOCTLCMD */
726         if (ret < 0)
727                 return ret;
728
729         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
730                 geo.output.width, geo.output.height, mbfmt.width, mbfmt.height);
731
732         /* Sanity checks */
733         if ((unsigned)mbfmt.width > VOU_MAX_IMAGE_WIDTH ||
734             (unsigned)mbfmt.height > img_height_max ||
735             mbfmt.code != V4L2_MBUS_FMT_YUYV8_2X8)
736                 return -EIO;
737
738         if (mbfmt.width != geo.output.width ||
739             mbfmt.height != geo.output.height) {
740                 geo.output.width = mbfmt.width;
741                 geo.output.height = mbfmt.height;
742
743                 vou_adjust_input(&geo, vou_dev->std);
744         }
745
746         /* We tried to preserve output rectangle, but it could have changed */
747         vou_dev->rect = geo.output;
748         pix->width = geo.in_width;
749         pix->height = geo.in_height;
750
751         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u\n", __func__,
752                 pix->width, pix->height);
753
754         vou_dev->pix_idx = pix_idx;
755
756         vou_dev->pix = *pix;
757
758         sh_vou_configure_geometry(vou_dev, pix_idx,
759                                   geo.scale_idx_h, geo.scale_idx_v);
760
761         return 0;
762 }
763
764 static int sh_vou_try_fmt_vid_out(struct file *file, void *priv,
765                                   struct v4l2_format *fmt)
766 {
767         struct sh_vou_file *vou_file = priv;
768         struct v4l2_pix_format *pix = &fmt->fmt.pix;
769         int i;
770
771         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
772
773         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
774         pix->field = V4L2_FIELD_NONE;
775
776         v4l_bound_align_image(&pix->width, 0, VOU_MAX_IMAGE_WIDTH, 1,
777                               &pix->height, 0, VOU_MAX_IMAGE_HEIGHT, 1, 0);
778
779         for (i = 0; ARRAY_SIZE(vou_fmt); i++)
780                 if (vou_fmt[i].pfmt == pix->pixelformat)
781                         return 0;
782
783         pix->pixelformat = vou_fmt[0].pfmt;
784
785         return 0;
786 }
787
788 static int sh_vou_reqbufs(struct file *file, void *priv,
789                           struct v4l2_requestbuffers *req)
790 {
791         struct sh_vou_file *vou_file = priv;
792
793         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
794
795         if (req->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
796                 return -EINVAL;
797
798         return videobuf_reqbufs(&vou_file->vbq, req);
799 }
800
801 static int sh_vou_querybuf(struct file *file, void *priv,
802                            struct v4l2_buffer *b)
803 {
804         struct sh_vou_file *vou_file = priv;
805
806         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
807
808         return videobuf_querybuf(&vou_file->vbq, b);
809 }
810
811 static int sh_vou_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
812 {
813         struct sh_vou_file *vou_file = priv;
814
815         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
816
817         return videobuf_qbuf(&vou_file->vbq, b);
818 }
819
820 static int sh_vou_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
821 {
822         struct sh_vou_file *vou_file = priv;
823
824         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
825
826         return videobuf_dqbuf(&vou_file->vbq, b, file->f_flags & O_NONBLOCK);
827 }
828
829 static int sh_vou_streamon(struct file *file, void *priv,
830                            enum v4l2_buf_type buftype)
831 {
832         struct video_device *vdev = video_devdata(file);
833         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
834         struct sh_vou_file *vou_file = priv;
835         int ret;
836
837         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
838
839         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
840                                          video, s_stream, 1);
841         if (ret < 0 && ret != -ENOIOCTLCMD)
842                 return ret;
843
844         /* This calls our .buf_queue() (== sh_vou_buf_queue) */
845         return videobuf_streamon(&vou_file->vbq);
846 }
847
848 static int sh_vou_streamoff(struct file *file, void *priv,
849                             enum v4l2_buf_type buftype)
850 {
851         struct video_device *vdev = video_devdata(file);
852         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
853         struct sh_vou_file *vou_file = priv;
854
855         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
856
857         /*
858          * This calls buf_release from host driver's videobuf_queue_ops for all
859          * remaining buffers. When the last buffer is freed, stop streaming
860          */
861         videobuf_streamoff(&vou_file->vbq);
862         v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video, s_stream, 0);
863
864         return 0;
865 }
866
867 static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)
868 {
869         switch (bus_fmt) {
870         default:
871                 pr_warning("%s(): Invalid bus-format code %d, using default 8-bit\n",
872                            __func__, bus_fmt);
873         case SH_VOU_BUS_8BIT:
874                 return 1;
875         case SH_VOU_BUS_16BIT:
876                 return 0;
877         case SH_VOU_BUS_BT656:
878                 return 3;
879         }
880 }
881
882 static int sh_vou_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
883 {
884         struct video_device *vdev = video_devdata(file);
885         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
886         int ret;
887
888         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): 0x%llx\n", __func__, *std_id);
889
890         if (*std_id & ~vdev->tvnorms)
891                 return -EINVAL;
892
893         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
894                                          s_std_output, *std_id);
895         /* Shall we continue, if the subdev doesn't support .s_std_output()? */
896         if (ret < 0 && ret != -ENOIOCTLCMD)
897                 return ret;
898
899         if (*std_id & V4L2_STD_525_60)
900                 sh_vou_reg_ab_set(vou_dev, VOUCR,
901                         sh_vou_ntsc_mode(vou_dev->pdata->bus_fmt) << 29, 7 << 29);
902         else
903                 sh_vou_reg_ab_set(vou_dev, VOUCR, 5 << 29, 7 << 29);
904
905         vou_dev->std = *std_id;
906
907         return 0;
908 }
909
910 static int sh_vou_g_std(struct file *file, void *priv, v4l2_std_id *std)
911 {
912         struct video_device *vdev = video_devdata(file);
913         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
914
915         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
916
917         *std = vou_dev->std;
918
919         return 0;
920 }
921
922 static int sh_vou_g_crop(struct file *file, void *fh, struct v4l2_crop *a)
923 {
924         struct video_device *vdev = video_devdata(file);
925         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
926
927         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
928
929         a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
930         a->c = vou_dev->rect;
931
932         return 0;
933 }
934
935 /* Assume a dull encoder, do all the work ourselves. */
936 static int sh_vou_s_crop(struct file *file, void *fh, struct v4l2_crop *a)
937 {
938         struct video_device *vdev = video_devdata(file);
939         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
940         struct v4l2_rect *rect = &a->c;
941         struct v4l2_crop sd_crop = {.type = V4L2_BUF_TYPE_VIDEO_OUTPUT};
942         struct v4l2_pix_format *pix = &vou_dev->pix;
943         struct sh_vou_geometry geo;
944         struct v4l2_mbus_framefmt mbfmt = {
945                 /* Revisit: is this the correct code? */
946                 .code = V4L2_MBUS_FMT_YUYV8_2X8,
947                 .field = V4L2_FIELD_INTERLACED,
948                 .colorspace = V4L2_COLORSPACE_SMPTE170M,
949         };
950         unsigned int img_height_max;
951         int ret;
952
953         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u@%u:%u\n", __func__,
954                 rect->width, rect->height, rect->left, rect->top);
955
956         if (a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
957                 return -EINVAL;
958
959         if (vou_dev->std & V4L2_STD_525_60)
960                 img_height_max = 480;
961         else
962                 img_height_max = 576;
963
964         v4l_bound_align_image(&rect->width, 0, VOU_MAX_IMAGE_WIDTH, 1,
965                               &rect->height, 0, img_height_max, 1, 0);
966
967         if (rect->width + rect->left > VOU_MAX_IMAGE_WIDTH)
968                 rect->left = VOU_MAX_IMAGE_WIDTH - rect->width;
969
970         if (rect->height + rect->top > img_height_max)
971                 rect->top = img_height_max - rect->height;
972
973         geo.output = *rect;
974         geo.in_width = pix->width;
975         geo.in_height = pix->height;
976
977         /* Configure the encoder one-to-one, position at 0, ignore errors */
978         sd_crop.c.width = geo.output.width;
979         sd_crop.c.height = geo.output.height;
980         /*
981          * We first issue a S_CROP, so that the subsequent S_FMT delivers the
982          * final encoder configuration.
983          */
984         v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
985                                    s_crop, &sd_crop);
986         mbfmt.width = geo.output.width;
987         mbfmt.height = geo.output.height;
988         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
989                                          s_mbus_fmt, &mbfmt);
990         /* Must be implemented, so, don't check for -ENOIOCTLCMD */
991         if (ret < 0)
992                 return ret;
993
994         /* Sanity checks */
995         if ((unsigned)mbfmt.width > VOU_MAX_IMAGE_WIDTH ||
996             (unsigned)mbfmt.height > img_height_max ||
997             mbfmt.code != V4L2_MBUS_FMT_YUYV8_2X8)
998                 return -EIO;
999
1000         geo.output.width = mbfmt.width;
1001         geo.output.height = mbfmt.height;
1002
1003         /*
1004          * No down-scaling. According to the API, current call has precedence:
1005          * http://v4l2spec.bytesex.org/spec/x1904.htm#AEN1954 paragraph two.
1006          */
1007         vou_adjust_input(&geo, vou_dev->std);
1008
1009         /* We tried to preserve output rectangle, but it could have changed */
1010         vou_dev->rect = geo.output;
1011         pix->width = geo.in_width;
1012         pix->height = geo.in_height;
1013
1014         sh_vou_configure_geometry(vou_dev, vou_dev->pix_idx,
1015                                   geo.scale_idx_h, geo.scale_idx_v);
1016
1017         return 0;
1018 }
1019
1020 /*
1021  * Total field: NTSC 858 x 2 * 262/263, PAL 864 x 2 * 312/313, default rectangle
1022  * is the initial register values, height takes the interlaced format into
1023  * account. The actual image can only go up to 720 x 2 * 240, So, VOUVPR can
1024  * actually only meaningfully contain values <= 720 and <= 240 respectively, and
1025  * not <= 864 and <= 312.
1026  */
1027 static int sh_vou_cropcap(struct file *file, void *priv,
1028                           struct v4l2_cropcap *a)
1029 {
1030         struct sh_vou_file *vou_file = priv;
1031
1032         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1033
1034         a->type                         = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1035         a->bounds.left                  = 0;
1036         a->bounds.top                   = 0;
1037         a->bounds.width                 = VOU_MAX_IMAGE_WIDTH;
1038         a->bounds.height                = VOU_MAX_IMAGE_HEIGHT;
1039         /* Default = max, set VOUDPR = 0, which is not hardware default */
1040         a->defrect.left                 = 0;
1041         a->defrect.top                  = 0;
1042         a->defrect.width                = VOU_MAX_IMAGE_WIDTH;
1043         a->defrect.height               = VOU_MAX_IMAGE_HEIGHT;
1044         a->pixelaspect.numerator        = 1;
1045         a->pixelaspect.denominator      = 1;
1046
1047         return 0;
1048 }
1049
1050 static irqreturn_t sh_vou_isr(int irq, void *dev_id)
1051 {
1052         struct sh_vou_device *vou_dev = dev_id;
1053         static unsigned long j;
1054         struct videobuf_buffer *vb;
1055         static int cnt;
1056         static int side;
1057         u32 irq_status = sh_vou_reg_a_read(vou_dev, VOUIR), masked;
1058         u32 vou_status = sh_vou_reg_a_read(vou_dev, VOUSTR);
1059
1060         if (!(irq_status & 0x300)) {
1061                 if (printk_timed_ratelimit(&j, 500))
1062                         dev_warn(vou_dev->v4l2_dev.dev, "IRQ status 0x%x!\n",
1063                                  irq_status);
1064                 return IRQ_NONE;
1065         }
1066
1067         spin_lock(&vou_dev->lock);
1068         if (!vou_dev->active || list_empty(&vou_dev->queue)) {
1069                 if (printk_timed_ratelimit(&j, 500))
1070                         dev_warn(vou_dev->v4l2_dev.dev,
1071                                  "IRQ without active buffer: %x!\n", irq_status);
1072                 /* Just ack: buf_release will disable further interrupts */
1073                 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x300);
1074                 spin_unlock(&vou_dev->lock);
1075                 return IRQ_HANDLED;
1076         }
1077
1078         masked = ~(0x300 & irq_status) & irq_status & 0x30304;
1079         dev_dbg(vou_dev->v4l2_dev.dev,
1080                 "IRQ status 0x%x -> 0x%x, VOU status 0x%x, cnt %d\n",
1081                 irq_status, masked, vou_status, cnt);
1082
1083         cnt++;
1084         side = vou_status & 0x10000;
1085
1086         /* Clear only set interrupts */
1087         sh_vou_reg_a_write(vou_dev, VOUIR, masked);
1088
1089         vb = vou_dev->active;
1090         list_del(&vb->queue);
1091
1092         vb->state = VIDEOBUF_DONE;
1093         do_gettimeofday(&vb->ts);
1094         vb->field_count++;
1095         wake_up(&vb->done);
1096
1097         if (list_empty(&vou_dev->queue)) {
1098                 /* Stop VOU */
1099                 dev_dbg(vou_dev->v4l2_dev.dev, "%s: queue empty after %d\n",
1100                         __func__, cnt);
1101                 sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
1102                 vou_dev->active = NULL;
1103                 vou_dev->status = SH_VOU_INITIALISING;
1104                 /* Disable End-of-Frame (VSYNC) interrupts */
1105                 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
1106                 spin_unlock(&vou_dev->lock);
1107                 return IRQ_HANDLED;
1108         }
1109
1110         vou_dev->active = list_entry(vou_dev->queue.next,
1111                                      struct videobuf_buffer, queue);
1112
1113         if (vou_dev->active->queue.next != &vou_dev->queue) {
1114                 struct videobuf_buffer *new = list_entry(vou_dev->active->queue.next,
1115                                                 struct videobuf_buffer, queue);
1116                 sh_vou_schedule_next(vou_dev, new);
1117         }
1118
1119         spin_unlock(&vou_dev->lock);
1120
1121         return IRQ_HANDLED;
1122 }
1123
1124 static int sh_vou_hw_init(struct sh_vou_device *vou_dev)
1125 {
1126         struct sh_vou_pdata *pdata = vou_dev->pdata;
1127         u32 voucr = sh_vou_ntsc_mode(pdata->bus_fmt) << 29;
1128         int i = 100;
1129
1130         /* Disable all IRQs */
1131         sh_vou_reg_a_write(vou_dev, VOUIR, 0);
1132
1133         /* Reset VOU interfaces - registers unaffected */
1134         sh_vou_reg_a_write(vou_dev, VOUSRR, 0x101);
1135         while (--i && (sh_vou_reg_a_read(vou_dev, VOUSRR) & 0x101))
1136                 udelay(1);
1137
1138         if (!i)
1139                 return -ETIMEDOUT;
1140
1141         dev_dbg(vou_dev->v4l2_dev.dev, "Reset took %dus\n", 100 - i);
1142
1143         if (pdata->flags & SH_VOU_PCLK_FALLING)
1144                 voucr |= 1 << 28;
1145         if (pdata->flags & SH_VOU_HSYNC_LOW)
1146                 voucr |= 1 << 27;
1147         if (pdata->flags & SH_VOU_VSYNC_LOW)
1148                 voucr |= 1 << 26;
1149         sh_vou_reg_ab_set(vou_dev, VOUCR, voucr, 0xfc000000);
1150
1151         /* Manual register side switching at first */
1152         sh_vou_reg_a_write(vou_dev, VOURCR, 4);
1153         /* Default - fixed HSYNC length, can be made configurable is required */
1154         sh_vou_reg_ab_write(vou_dev, VOUMSR, 0x800000);
1155
1156         return 0;
1157 }
1158
1159 /* File operations */
1160 static int sh_vou_open(struct file *file)
1161 {
1162         struct video_device *vdev = video_devdata(file);
1163         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1164         struct sh_vou_file *vou_file = kzalloc(sizeof(struct sh_vou_file),
1165                                                GFP_KERNEL);
1166
1167         if (!vou_file)
1168                 return -ENOMEM;
1169
1170         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
1171
1172         file->private_data = vou_file;
1173
1174         if (atomic_inc_return(&vou_dev->use_count) == 1) {
1175                 int ret;
1176                 /* First open */
1177                 vou_dev->status = SH_VOU_INITIALISING;
1178                 pm_runtime_get_sync(vdev->v4l2_dev->dev);
1179                 ret = sh_vou_hw_init(vou_dev);
1180                 if (ret < 0) {
1181                         atomic_dec(&vou_dev->use_count);
1182                         pm_runtime_put(vdev->v4l2_dev->dev);
1183                         vou_dev->status = SH_VOU_IDLE;
1184                         return ret;
1185                 }
1186         }
1187
1188         videobuf_queue_dma_contig_init(&vou_file->vbq, &sh_vou_video_qops,
1189                                        vou_dev->v4l2_dev.dev, &vou_dev->lock,
1190                                        V4L2_BUF_TYPE_VIDEO_OUTPUT,
1191                                        V4L2_FIELD_NONE,
1192                                        sizeof(struct videobuf_buffer), vdev,
1193                                        NULL);
1194
1195         return 0;
1196 }
1197
1198 static int sh_vou_release(struct file *file)
1199 {
1200         struct video_device *vdev = video_devdata(file);
1201         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1202         struct sh_vou_file *vou_file = file->private_data;
1203
1204         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1205
1206         if (!atomic_dec_return(&vou_dev->use_count)) {
1207                 /* Last close */
1208                 vou_dev->status = SH_VOU_IDLE;
1209                 sh_vou_reg_a_set(vou_dev, VOUER, 0, 0x101);
1210                 pm_runtime_put(vdev->v4l2_dev->dev);
1211         }
1212
1213         file->private_data = NULL;
1214         kfree(vou_file);
1215
1216         return 0;
1217 }
1218
1219 static int sh_vou_mmap(struct file *file, struct vm_area_struct *vma)
1220 {
1221         struct sh_vou_file *vou_file = file->private_data;
1222
1223         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1224
1225         return videobuf_mmap_mapper(&vou_file->vbq, vma);
1226 }
1227
1228 static unsigned int sh_vou_poll(struct file *file, poll_table *wait)
1229 {
1230         struct sh_vou_file *vou_file = file->private_data;
1231
1232         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1233
1234         return videobuf_poll_stream(file, &vou_file->vbq, wait);
1235 }
1236
1237 static int sh_vou_g_chip_ident(struct file *file, void *fh,
1238                                    struct v4l2_dbg_chip_ident *id)
1239 {
1240         struct video_device *vdev = video_devdata(file);
1241         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1242
1243         return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, g_chip_ident, id);
1244 }
1245
1246 #ifdef CONFIG_VIDEO_ADV_DEBUG
1247 static int sh_vou_g_register(struct file *file, void *fh,
1248                                  struct v4l2_dbg_register *reg)
1249 {
1250         struct video_device *vdev = video_devdata(file);
1251         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1252
1253         return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, g_register, reg);
1254 }
1255
1256 static int sh_vou_s_register(struct file *file, void *fh,
1257                                  struct v4l2_dbg_register *reg)
1258 {
1259         struct video_device *vdev = video_devdata(file);
1260         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1261
1262         return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, s_register, reg);
1263 }
1264 #endif
1265
1266 /* sh_vou display ioctl operations */
1267 static const struct v4l2_ioctl_ops sh_vou_ioctl_ops = {
1268         .vidioc_querycap                = sh_vou_querycap,
1269         .vidioc_enum_fmt_vid_out        = sh_vou_enum_fmt_vid_out,
1270         .vidioc_g_fmt_vid_out           = sh_vou_g_fmt_vid_out,
1271         .vidioc_s_fmt_vid_out           = sh_vou_s_fmt_vid_out,
1272         .vidioc_try_fmt_vid_out         = sh_vou_try_fmt_vid_out,
1273         .vidioc_reqbufs                 = sh_vou_reqbufs,
1274         .vidioc_querybuf                = sh_vou_querybuf,
1275         .vidioc_qbuf                    = sh_vou_qbuf,
1276         .vidioc_dqbuf                   = sh_vou_dqbuf,
1277         .vidioc_streamon                = sh_vou_streamon,
1278         .vidioc_streamoff               = sh_vou_streamoff,
1279         .vidioc_s_std                   = sh_vou_s_std,
1280         .vidioc_g_std                   = sh_vou_g_std,
1281         .vidioc_cropcap                 = sh_vou_cropcap,
1282         .vidioc_g_crop                  = sh_vou_g_crop,
1283         .vidioc_s_crop                  = sh_vou_s_crop,
1284         .vidioc_g_chip_ident            = sh_vou_g_chip_ident,
1285 #ifdef CONFIG_VIDEO_ADV_DEBUG
1286         .vidioc_g_register              = sh_vou_g_register,
1287         .vidioc_s_register              = sh_vou_s_register,
1288 #endif
1289 };
1290
1291 static const struct v4l2_file_operations sh_vou_fops = {
1292         .owner          = THIS_MODULE,
1293         .open           = sh_vou_open,
1294         .release        = sh_vou_release,
1295         .ioctl          = video_ioctl2,
1296         .mmap           = sh_vou_mmap,
1297         .poll           = sh_vou_poll,
1298 };
1299
1300 static const struct video_device sh_vou_video_template = {
1301         .name           = "sh_vou",
1302         .fops           = &sh_vou_fops,
1303         .ioctl_ops      = &sh_vou_ioctl_ops,
1304         .tvnorms        = V4L2_STD_525_60, /* PAL only supported in 8-bit non-bt656 mode */
1305         .current_norm   = V4L2_STD_NTSC_M,
1306 };
1307
1308 static int __devinit sh_vou_probe(struct platform_device *pdev)
1309 {
1310         struct sh_vou_pdata *vou_pdata = pdev->dev.platform_data;
1311         struct v4l2_rect *rect;
1312         struct v4l2_pix_format *pix;
1313         struct i2c_adapter *i2c_adap;
1314         struct video_device *vdev;
1315         struct sh_vou_device *vou_dev;
1316         struct resource *reg_res, *region;
1317         struct v4l2_subdev *subdev;
1318         int irq, ret;
1319
1320         reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1321         irq = platform_get_irq(pdev, 0);
1322
1323         if (!vou_pdata || !reg_res || irq <= 0) {
1324                 dev_err(&pdev->dev, "Insufficient VOU platform information.\n");
1325                 return -ENODEV;
1326         }
1327
1328         vou_dev = kzalloc(sizeof(*vou_dev), GFP_KERNEL);
1329         if (!vou_dev)
1330                 return -ENOMEM;
1331
1332         INIT_LIST_HEAD(&vou_dev->queue);
1333         spin_lock_init(&vou_dev->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
1392         vou_dev->vdev = vdev;
1393         video_set_drvdata(vdev, vou_dev);
1394
1395         pm_runtime_enable(&pdev->dev);
1396         pm_runtime_resume(&pdev->dev);
1397
1398         i2c_adap = i2c_get_adapter(vou_pdata->i2c_adap);
1399         if (!i2c_adap) {
1400                 ret = -ENODEV;
1401                 goto ei2cgadap;
1402         }
1403
1404         ret = sh_vou_hw_init(vou_dev);
1405         if (ret < 0)
1406                 goto ereset;
1407
1408         subdev = v4l2_i2c_new_subdev_board(&vou_dev->v4l2_dev, i2c_adap,
1409                         NULL, vou_pdata->board_info, NULL);
1410         if (!subdev) {
1411                 ret = -ENOMEM;
1412                 goto ei2cnd;
1413         }
1414
1415         ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1416         if (ret < 0)
1417                 goto evregdev;
1418
1419         return 0;
1420
1421 evregdev:
1422 ei2cnd:
1423 ereset:
1424         i2c_put_adapter(i2c_adap);
1425 ei2cgadap:
1426         video_device_release(vdev);
1427         pm_runtime_disable(&pdev->dev);
1428 evdevalloc:
1429         v4l2_device_unregister(&vou_dev->v4l2_dev);
1430 ev4l2devreg:
1431         free_irq(irq, vou_dev);
1432 ereqirq:
1433         iounmap(vou_dev->base);
1434 emap:
1435         release_mem_region(reg_res->start, resource_size(reg_res));
1436 ereqmemreg:
1437         kfree(vou_dev);
1438         return ret;
1439 }
1440
1441 static int __devexit sh_vou_remove(struct platform_device *pdev)
1442 {
1443         int irq = platform_get_irq(pdev, 0);
1444         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1445         struct sh_vou_device *vou_dev = container_of(v4l2_dev,
1446                                                 struct sh_vou_device, v4l2_dev);
1447         struct v4l2_subdev *sd = list_entry(v4l2_dev->subdevs.next,
1448                                             struct v4l2_subdev, list);
1449         struct i2c_client *client = v4l2_get_subdevdata(sd);
1450         struct resource *reg_res;
1451
1452         if (irq > 0)
1453                 free_irq(irq, vou_dev);
1454         pm_runtime_disable(&pdev->dev);
1455         video_unregister_device(vou_dev->vdev);
1456         i2c_put_adapter(client->adapter);
1457         v4l2_device_unregister(&vou_dev->v4l2_dev);
1458         iounmap(vou_dev->base);
1459         reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1460         if (reg_res)
1461                 release_mem_region(reg_res->start, resource_size(reg_res));
1462         kfree(vou_dev);
1463         return 0;
1464 }
1465
1466 static struct platform_driver __refdata sh_vou = {
1467         .remove  = __devexit_p(sh_vou_remove),
1468         .driver  = {
1469                 .name   = "sh-vou",
1470                 .owner  = THIS_MODULE,
1471         },
1472 };
1473
1474 static int __init sh_vou_init(void)
1475 {
1476         return platform_driver_probe(&sh_vou, sh_vou_probe);
1477 }
1478
1479 static void __exit sh_vou_exit(void)
1480 {
1481         platform_driver_unregister(&sh_vou);
1482 }
1483
1484 module_init(sh_vou_init);
1485 module_exit(sh_vou_exit);
1486
1487 MODULE_DESCRIPTION("SuperH VOU driver");
1488 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1489 MODULE_LICENSE("GPL v2");
1490 MODULE_ALIAS("platform:sh-vou");