[media] marvell-cam: Basic working MMP camera driver
[linux-2.6.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         struct mutex fop_lock;
79 };
80
81 struct sh_vou_file {
82         struct videobuf_queue vbq;
83 };
84
85 /* Register access routines for sides A, B and mirror addresses */
86 static void sh_vou_reg_a_write(struct sh_vou_device *vou_dev, unsigned int reg,
87                                u32 value)
88 {
89         __raw_writel(value, vou_dev->base + reg);
90 }
91
92 static void sh_vou_reg_ab_write(struct sh_vou_device *vou_dev, unsigned int reg,
93                                 u32 value)
94 {
95         __raw_writel(value, vou_dev->base + reg);
96         __raw_writel(value, vou_dev->base + reg + 0x1000);
97 }
98
99 static void sh_vou_reg_m_write(struct sh_vou_device *vou_dev, unsigned int reg,
100                                u32 value)
101 {
102         __raw_writel(value, vou_dev->base + reg + 0x2000);
103 }
104
105 static u32 sh_vou_reg_a_read(struct sh_vou_device *vou_dev, unsigned int reg)
106 {
107         return __raw_readl(vou_dev->base + reg);
108 }
109
110 static void sh_vou_reg_a_set(struct sh_vou_device *vou_dev, unsigned int reg,
111                              u32 value, u32 mask)
112 {
113         u32 old = __raw_readl(vou_dev->base + reg);
114
115         value = (value & mask) | (old & ~mask);
116         __raw_writel(value, vou_dev->base + reg);
117 }
118
119 static void sh_vou_reg_b_set(struct sh_vou_device *vou_dev, unsigned int reg,
120                              u32 value, u32 mask)
121 {
122         sh_vou_reg_a_set(vou_dev, reg + 0x1000, value, mask);
123 }
124
125 static void sh_vou_reg_ab_set(struct sh_vou_device *vou_dev, unsigned int reg,
126                               u32 value, u32 mask)
127 {
128         sh_vou_reg_a_set(vou_dev, reg, value, mask);
129         sh_vou_reg_b_set(vou_dev, reg, value, mask);
130 }
131
132 struct sh_vou_fmt {
133         u32             pfmt;
134         char            *desc;
135         unsigned char   bpp;
136         unsigned char   rgb;
137         unsigned char   yf;
138         unsigned char   pkf;
139 };
140
141 /* Further pixel formats can be added */
142 static struct sh_vou_fmt vou_fmt[] = {
143         {
144                 .pfmt   = V4L2_PIX_FMT_NV12,
145                 .bpp    = 12,
146                 .desc   = "YVU420 planar",
147                 .yf     = 0,
148                 .rgb    = 0,
149         },
150         {
151                 .pfmt   = V4L2_PIX_FMT_NV16,
152                 .bpp    = 16,
153                 .desc   = "YVYU planar",
154                 .yf     = 1,
155                 .rgb    = 0,
156         },
157         {
158                 .pfmt   = V4L2_PIX_FMT_RGB24,
159                 .bpp    = 24,
160                 .desc   = "RGB24",
161                 .pkf    = 2,
162                 .rgb    = 1,
163         },
164         {
165                 .pfmt   = V4L2_PIX_FMT_RGB565,
166                 .bpp    = 16,
167                 .desc   = "RGB565",
168                 .pkf    = 3,
169                 .rgb    = 1,
170         },
171         {
172                 .pfmt   = V4L2_PIX_FMT_RGB565X,
173                 .bpp    = 16,
174                 .desc   = "RGB565 byteswapped",
175                 .pkf    = 3,
176                 .rgb    = 1,
177         },
178 };
179
180 static void sh_vou_schedule_next(struct sh_vou_device *vou_dev,
181                                  struct videobuf_buffer *vb)
182 {
183         dma_addr_t addr1, addr2;
184
185         addr1 = videobuf_to_dma_contig(vb);
186         switch (vou_dev->pix.pixelformat) {
187         case V4L2_PIX_FMT_NV12:
188         case V4L2_PIX_FMT_NV16:
189                 addr2 = addr1 + vou_dev->pix.width * vou_dev->pix.height;
190                 break;
191         default:
192                 addr2 = 0;
193         }
194
195         sh_vou_reg_m_write(vou_dev, VOUAD1R, addr1);
196         sh_vou_reg_m_write(vou_dev, VOUAD2R, addr2);
197 }
198
199 static void sh_vou_stream_start(struct sh_vou_device *vou_dev,
200                                 struct videobuf_buffer *vb)
201 {
202         unsigned int row_coeff;
203 #ifdef __LITTLE_ENDIAN
204         u32 dataswap = 7;
205 #else
206         u32 dataswap = 0;
207 #endif
208
209         switch (vou_dev->pix.pixelformat) {
210         case V4L2_PIX_FMT_NV12:
211         case V4L2_PIX_FMT_NV16:
212                 row_coeff = 1;
213                 break;
214         case V4L2_PIX_FMT_RGB565:
215                 dataswap ^= 1;
216         case V4L2_PIX_FMT_RGB565X:
217                 row_coeff = 2;
218                 break;
219         case V4L2_PIX_FMT_RGB24:
220                 row_coeff = 3;
221                 break;
222         }
223
224         sh_vou_reg_a_write(vou_dev, VOUSWR, dataswap);
225         sh_vou_reg_ab_write(vou_dev, VOUAIR, vou_dev->pix.width * row_coeff);
226         sh_vou_schedule_next(vou_dev, vb);
227 }
228
229 static void free_buffer(struct videobuf_queue *vq, struct videobuf_buffer *vb)
230 {
231         BUG_ON(in_interrupt());
232
233         /* Wait until this buffer is no longer in STATE_QUEUED or STATE_ACTIVE */
234         videobuf_waiton(vq, vb, 0, 0);
235         videobuf_dma_contig_free(vq, vb);
236         vb->state = VIDEOBUF_NEEDS_INIT;
237 }
238
239 /* Locking: caller holds fop_lock mutex */
240 static int sh_vou_buf_setup(struct videobuf_queue *vq, unsigned int *count,
241                             unsigned int *size)
242 {
243         struct video_device *vdev = vq->priv_data;
244         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
245
246         *size = vou_fmt[vou_dev->pix_idx].bpp * vou_dev->pix.width *
247                 vou_dev->pix.height / 8;
248
249         if (*count < 2)
250                 *count = 2;
251
252         /* Taking into account maximum frame size, *count will stay >= 2 */
253         if (PAGE_ALIGN(*size) * *count > 4 * 1024 * 1024)
254                 *count = 4 * 1024 * 1024 / PAGE_ALIGN(*size);
255
256         dev_dbg(vq->dev, "%s(): count=%d, size=%d\n", __func__, *count, *size);
257
258         return 0;
259 }
260
261 /* Locking: caller holds fop_lock mutex */
262 static int sh_vou_buf_prepare(struct videobuf_queue *vq,
263                               struct videobuf_buffer *vb,
264                               enum v4l2_field field)
265 {
266         struct video_device *vdev = vq->priv_data;
267         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
268         struct v4l2_pix_format *pix = &vou_dev->pix;
269         int bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
270         int ret;
271
272         dev_dbg(vq->dev, "%s()\n", __func__);
273
274         if (vb->width   != pix->width ||
275             vb->height  != pix->height ||
276             vb->field   != pix->field) {
277                 vb->width       = pix->width;
278                 vb->height      = pix->height;
279                 vb->field       = field;
280                 if (vb->state != VIDEOBUF_NEEDS_INIT)
281                         free_buffer(vq, vb);
282         }
283
284         vb->size = vb->height * bytes_per_line;
285         if (vb->baddr && vb->bsize < vb->size) {
286                 /* User buffer too small */
287                 dev_warn(vq->dev, "User buffer too small: [%u] @ %lx\n",
288                          vb->bsize, vb->baddr);
289                 return -EINVAL;
290         }
291
292         if (vb->state == VIDEOBUF_NEEDS_INIT) {
293                 ret = videobuf_iolock(vq, vb, NULL);
294                 if (ret < 0) {
295                         dev_warn(vq->dev, "IOLOCK buf-type %d: %d\n",
296                                  vb->memory, ret);
297                         return ret;
298                 }
299                 vb->state = VIDEOBUF_PREPARED;
300         }
301
302         dev_dbg(vq->dev,
303                 "%s(): fmt #%d, %u bytes per line, phys 0x%x, type %d, state %d\n",
304                 __func__, vou_dev->pix_idx, bytes_per_line,
305                 videobuf_to_dma_contig(vb), vb->memory, vb->state);
306
307         return 0;
308 }
309
310 /* Locking: caller holds fop_lock mutex and vq->irqlock spinlock */
311 static void sh_vou_buf_queue(struct videobuf_queue *vq,
312                              struct videobuf_buffer *vb)
313 {
314         struct video_device *vdev = vq->priv_data;
315         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
316
317         dev_dbg(vq->dev, "%s()\n", __func__);
318
319         vb->state = VIDEOBUF_QUEUED;
320         list_add_tail(&vb->queue, &vou_dev->queue);
321
322         if (vou_dev->status == SH_VOU_RUNNING) {
323                 return;
324         } else if (!vou_dev->active) {
325                 vou_dev->active = vb;
326                 /* Start from side A: we use mirror addresses, so, set B */
327                 sh_vou_reg_a_write(vou_dev, VOURPR, 1);
328                 dev_dbg(vq->dev, "%s: first buffer status 0x%x\n", __func__,
329                         sh_vou_reg_a_read(vou_dev, VOUSTR));
330                 sh_vou_schedule_next(vou_dev, vb);
331                 /* Only activate VOU after the second buffer */
332         } else if (vou_dev->active->queue.next == &vb->queue) {
333                 /* Second buffer - initialise register side B */
334                 sh_vou_reg_a_write(vou_dev, VOURPR, 0);
335                 sh_vou_stream_start(vou_dev, vb);
336
337                 /* Register side switching with frame VSYNC */
338                 sh_vou_reg_a_write(vou_dev, VOURCR, 5);
339                 dev_dbg(vq->dev, "%s: second buffer status 0x%x\n", __func__,
340                         sh_vou_reg_a_read(vou_dev, VOUSTR));
341
342                 /* Enable End-of-Frame (VSYNC) interrupts */
343                 sh_vou_reg_a_write(vou_dev, VOUIR, 0x10004);
344                 /* Two buffers on the queue - activate the hardware */
345
346                 vou_dev->status = SH_VOU_RUNNING;
347                 sh_vou_reg_a_write(vou_dev, VOUER, 0x107);
348         }
349 }
350
351 static void sh_vou_buf_release(struct videobuf_queue *vq,
352                                struct videobuf_buffer *vb)
353 {
354         struct video_device *vdev = vq->priv_data;
355         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
356         unsigned long flags;
357
358         dev_dbg(vq->dev, "%s()\n", __func__);
359
360         spin_lock_irqsave(&vou_dev->lock, flags);
361
362         if (vou_dev->active == vb) {
363                 /* disable output */
364                 sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
365                 /* ...but the current frame will complete */
366                 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
367                 vou_dev->active = NULL;
368         }
369
370         if ((vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED)) {
371                 vb->state = VIDEOBUF_ERROR;
372                 list_del(&vb->queue);
373         }
374
375         spin_unlock_irqrestore(&vou_dev->lock, flags);
376
377         free_buffer(vq, vb);
378 }
379
380 static struct videobuf_queue_ops sh_vou_video_qops = {
381         .buf_setup      = sh_vou_buf_setup,
382         .buf_prepare    = sh_vou_buf_prepare,
383         .buf_queue      = sh_vou_buf_queue,
384         .buf_release    = sh_vou_buf_release,
385 };
386
387 /* Video IOCTLs */
388 static int sh_vou_querycap(struct file *file, void  *priv,
389                            struct v4l2_capability *cap)
390 {
391         struct sh_vou_file *vou_file = priv;
392
393         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
394
395         strlcpy(cap->card, "SuperH VOU", sizeof(cap->card));
396         cap->version = KERNEL_VERSION(0, 1, 0);
397         cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
398         return 0;
399 }
400
401 /* Enumerate formats, that the device can accept from the user */
402 static int sh_vou_enum_fmt_vid_out(struct file *file, void  *priv,
403                                    struct v4l2_fmtdesc *fmt)
404 {
405         struct sh_vou_file *vou_file = priv;
406
407         if (fmt->index >= ARRAY_SIZE(vou_fmt))
408                 return -EINVAL;
409
410         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
411
412         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
413         strlcpy(fmt->description, vou_fmt[fmt->index].desc,
414                 sizeof(fmt->description));
415         fmt->pixelformat = vou_fmt[fmt->index].pfmt;
416
417         return 0;
418 }
419
420 static int sh_vou_g_fmt_vid_out(struct file *file, void *priv,
421                                 struct v4l2_format *fmt)
422 {
423         struct video_device *vdev = video_devdata(file);
424         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
425
426         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
427
428         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
429         fmt->fmt.pix = vou_dev->pix;
430
431         return 0;
432 }
433
434 static const unsigned char vou_scale_h_num[] = {1, 9, 2, 9, 4};
435 static const unsigned char vou_scale_h_den[] = {1, 8, 1, 4, 1};
436 static const unsigned char vou_scale_h_fld[] = {0, 2, 1, 3};
437 static const unsigned char vou_scale_v_num[] = {1, 2, 4};
438 static const unsigned char vou_scale_v_den[] = {1, 1, 1};
439 static const unsigned char vou_scale_v_fld[] = {0, 1};
440
441 static void sh_vou_configure_geometry(struct sh_vou_device *vou_dev,
442                                       int pix_idx, int w_idx, int h_idx)
443 {
444         struct sh_vou_fmt *fmt = vou_fmt + pix_idx;
445         unsigned int black_left, black_top, width_max, height_max,
446                 frame_in_height, frame_out_height, frame_out_top;
447         struct v4l2_rect *rect = &vou_dev->rect;
448         struct v4l2_pix_format *pix = &vou_dev->pix;
449         u32 vouvcr = 0, dsr_h, dsr_v;
450
451         if (vou_dev->std & V4L2_STD_525_60) {
452                 width_max = 858;
453                 height_max = 262;
454         } else {
455                 width_max = 864;
456                 height_max = 312;
457         }
458
459         frame_in_height = pix->height / 2;
460         frame_out_height = rect->height / 2;
461         frame_out_top = rect->top / 2;
462
463         /*
464          * Cropping scheme: max useful image is 720x480, and the total video
465          * area is 858x525 (NTSC) or 864x625 (PAL). AK8813 / 8814 starts
466          * sampling data beginning with fixed 276th (NTSC) / 288th (PAL) clock,
467          * of which the first 33 / 25 clocks HSYNC must be held active. This
468          * has to be configured in CR[HW]. 1 pixel equals 2 clock periods.
469          * This gives CR[HW] = 16 / 12, VPR[HVP] = 138 / 144, which gives
470          * exactly 858 - 138 = 864 - 144 = 720! We call the out-of-display area,
471          * beyond DSR, specified on the left and top by the VPR register "black
472          * pixels" and out-of-image area (DPR) "background pixels." We fix VPR
473          * at 138 / 144 : 20, because that's the HSYNC timing, that our first
474          * client requires, and that's exactly what leaves us 720 pixels for the
475          * image; we leave VPR[VVP] at default 20 for now, because the client
476          * doesn't seem to have any special requirements for it. Otherwise we
477          * could also set it to max - 240 = 22 / 72. Thus VPR depends only on
478          * the selected standard, and DPR and DSR are selected according to
479          * cropping. Q: how does the client detect the first valid line? Does
480          * HSYNC stay inactive during invalid (black) lines?
481          */
482         black_left = width_max - VOU_MAX_IMAGE_WIDTH;
483         black_top = 20;
484
485         dsr_h = rect->width + rect->left;
486         dsr_v = frame_out_height + frame_out_top;
487
488         dev_dbg(vou_dev->v4l2_dev.dev,
489                 "image %ux%u, black %u:%u, offset %u:%u, display %ux%u\n",
490                 pix->width, frame_in_height, black_left, black_top,
491                 rect->left, frame_out_top, dsr_h, dsr_v);
492
493         /* VOUISR height - half of a frame height in frame mode */
494         sh_vou_reg_ab_write(vou_dev, VOUISR, (pix->width << 16) | frame_in_height);
495         sh_vou_reg_ab_write(vou_dev, VOUVPR, (black_left << 16) | black_top);
496         sh_vou_reg_ab_write(vou_dev, VOUDPR, (rect->left << 16) | frame_out_top);
497         sh_vou_reg_ab_write(vou_dev, VOUDSR, (dsr_h << 16) | dsr_v);
498
499         /*
500          * if necessary, we could set VOUHIR to
501          * max(black_left + dsr_h, width_max) here
502          */
503
504         if (w_idx)
505                 vouvcr |= (1 << 15) | (vou_scale_h_fld[w_idx - 1] << 4);
506         if (h_idx)
507                 vouvcr |= (1 << 14) | vou_scale_v_fld[h_idx - 1];
508
509         dev_dbg(vou_dev->v4l2_dev.dev, "%s: scaling 0x%x\n", fmt->desc, vouvcr);
510
511         /* To produce a colour bar for testing set bit 23 of VOUVCR */
512         sh_vou_reg_ab_write(vou_dev, VOUVCR, vouvcr);
513         sh_vou_reg_ab_write(vou_dev, VOUDFR,
514                             fmt->pkf | (fmt->yf << 8) | (fmt->rgb << 16));
515 }
516
517 struct sh_vou_geometry {
518         struct v4l2_rect output;
519         unsigned int in_width;
520         unsigned int in_height;
521         int scale_idx_h;
522         int scale_idx_v;
523 };
524
525 /*
526  * Find input geometry, that we can use to produce output, closest to the
527  * requested rectangle, using VOU scaling
528  */
529 static void vou_adjust_input(struct sh_vou_geometry *geo, v4l2_std_id std)
530 {
531         /* The compiler cannot know, that best and idx will indeed be set */
532         unsigned int best_err = UINT_MAX, best = 0, img_height_max;
533         int i, idx = 0;
534
535         if (std & V4L2_STD_525_60)
536                 img_height_max = 480;
537         else
538                 img_height_max = 576;
539
540         /* Image width must be a multiple of 4 */
541         v4l_bound_align_image(&geo->in_width, 0, VOU_MAX_IMAGE_WIDTH, 2,
542                               &geo->in_height, 0, img_height_max, 1, 0);
543
544         /* Select scales to come as close as possible to the output image */
545         for (i = ARRAY_SIZE(vou_scale_h_num) - 1; i >= 0; i--) {
546                 unsigned int err;
547                 unsigned int found = geo->output.width * vou_scale_h_den[i] /
548                         vou_scale_h_num[i];
549
550                 if (found > VOU_MAX_IMAGE_WIDTH)
551                         /* scales increase */
552                         break;
553
554                 err = abs(found - geo->in_width);
555                 if (err < best_err) {
556                         best_err = err;
557                         idx = i;
558                         best = found;
559                 }
560                 if (!err)
561                         break;
562         }
563
564         geo->in_width = best;
565         geo->scale_idx_h = idx;
566
567         best_err = UINT_MAX;
568
569         /* This loop can be replaced with one division */
570         for (i = ARRAY_SIZE(vou_scale_v_num) - 1; i >= 0; i--) {
571                 unsigned int err;
572                 unsigned int found = geo->output.height * vou_scale_v_den[i] /
573                         vou_scale_v_num[i];
574
575                 if (found > img_height_max)
576                         /* scales increase */
577                         break;
578
579                 err = abs(found - geo->in_height);
580                 if (err < best_err) {
581                         best_err = err;
582                         idx = i;
583                         best = found;
584                 }
585                 if (!err)
586                         break;
587         }
588
589         geo->in_height = best;
590         geo->scale_idx_v = idx;
591 }
592
593 /*
594  * Find output geometry, that we can produce, using VOU scaling, closest to
595  * the requested rectangle
596  */
597 static void vou_adjust_output(struct sh_vou_geometry *geo, v4l2_std_id std)
598 {
599         unsigned int best_err = UINT_MAX, best, width_max, height_max,
600                 img_height_max;
601         int i, idx;
602
603         if (std & V4L2_STD_525_60) {
604                 width_max = 858;
605                 height_max = 262 * 2;
606                 img_height_max = 480;
607         } else {
608                 width_max = 864;
609                 height_max = 312 * 2;
610                 img_height_max = 576;
611         }
612
613         /* Select scales to come as close as possible to the output image */
614         for (i = 0; i < ARRAY_SIZE(vou_scale_h_num); i++) {
615                 unsigned int err;
616                 unsigned int found = geo->in_width * vou_scale_h_num[i] /
617                         vou_scale_h_den[i];
618
619                 if (found > VOU_MAX_IMAGE_WIDTH)
620                         /* scales increase */
621                         break;
622
623                 err = abs(found - geo->output.width);
624                 if (err < best_err) {
625                         best_err = err;
626                         idx = i;
627                         best = found;
628                 }
629                 if (!err)
630                         break;
631         }
632
633         geo->output.width = best;
634         geo->scale_idx_h = idx;
635         if (geo->output.left + best > width_max)
636                 geo->output.left = width_max - best;
637
638         pr_debug("%s(): W %u * %u/%u = %u\n", __func__, geo->in_width,
639                  vou_scale_h_num[idx], vou_scale_h_den[idx], best);
640
641         best_err = UINT_MAX;
642
643         /* This loop can be replaced with one division */
644         for (i = 0; i < ARRAY_SIZE(vou_scale_v_num); i++) {
645                 unsigned int err;
646                 unsigned int found = geo->in_height * vou_scale_v_num[i] /
647                         vou_scale_v_den[i];
648
649                 if (found > img_height_max)
650                         /* scales increase */
651                         break;
652
653                 err = abs(found - geo->output.height);
654                 if (err < best_err) {
655                         best_err = err;
656                         idx = i;
657                         best = found;
658                 }
659                 if (!err)
660                         break;
661         }
662
663         geo->output.height = best;
664         geo->scale_idx_v = idx;
665         if (geo->output.top + best > height_max)
666                 geo->output.top = height_max - best;
667
668         pr_debug("%s(): H %u * %u/%u = %u\n", __func__, geo->in_height,
669                  vou_scale_v_num[idx], vou_scale_v_den[idx], best);
670 }
671
672 static int sh_vou_s_fmt_vid_out(struct file *file, void *priv,
673                                 struct v4l2_format *fmt)
674 {
675         struct video_device *vdev = video_devdata(file);
676         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
677         struct v4l2_pix_format *pix = &fmt->fmt.pix;
678         unsigned int img_height_max;
679         int pix_idx;
680         struct sh_vou_geometry geo;
681         struct v4l2_mbus_framefmt mbfmt = {
682                 /* Revisit: is this the correct code? */
683                 .code = V4L2_MBUS_FMT_YUYV8_2X8,
684                 .field = V4L2_FIELD_INTERLACED,
685                 .colorspace = V4L2_COLORSPACE_SMPTE170M,
686         };
687         int ret;
688
689         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
690                 vou_dev->rect.width, vou_dev->rect.height,
691                 pix->width, pix->height);
692
693         if (pix->field == V4L2_FIELD_ANY)
694                 pix->field = V4L2_FIELD_NONE;
695
696         if (fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
697             pix->field != V4L2_FIELD_NONE)
698                 return -EINVAL;
699
700         for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
701                 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
702                         break;
703
704         if (pix_idx == ARRAY_SIZE(vou_fmt))
705                 return -EINVAL;
706
707         if (vou_dev->std & V4L2_STD_525_60)
708                 img_height_max = 480;
709         else
710                 img_height_max = 576;
711
712         /* Image width must be a multiple of 4 */
713         v4l_bound_align_image(&pix->width, 0, VOU_MAX_IMAGE_WIDTH, 2,
714                               &pix->height, 0, img_height_max, 1, 0);
715
716         geo.in_width = pix->width;
717         geo.in_height = pix->height;
718         geo.output = vou_dev->rect;
719
720         vou_adjust_output(&geo, vou_dev->std);
721
722         mbfmt.width = geo.output.width;
723         mbfmt.height = geo.output.height;
724         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
725                                          s_mbus_fmt, &mbfmt);
726         /* Must be implemented, so, don't check for -ENOIOCTLCMD */
727         if (ret < 0)
728                 return ret;
729
730         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
731                 geo.output.width, geo.output.height, mbfmt.width, mbfmt.height);
732
733         /* Sanity checks */
734         if ((unsigned)mbfmt.width > VOU_MAX_IMAGE_WIDTH ||
735             (unsigned)mbfmt.height > img_height_max ||
736             mbfmt.code != V4L2_MBUS_FMT_YUYV8_2X8)
737                 return -EIO;
738
739         if (mbfmt.width != geo.output.width ||
740             mbfmt.height != geo.output.height) {
741                 geo.output.width = mbfmt.width;
742                 geo.output.height = mbfmt.height;
743
744                 vou_adjust_input(&geo, vou_dev->std);
745         }
746
747         /* We tried to preserve output rectangle, but it could have changed */
748         vou_dev->rect = geo.output;
749         pix->width = geo.in_width;
750         pix->height = geo.in_height;
751
752         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u\n", __func__,
753                 pix->width, pix->height);
754
755         vou_dev->pix_idx = pix_idx;
756
757         vou_dev->pix = *pix;
758
759         sh_vou_configure_geometry(vou_dev, pix_idx,
760                                   geo.scale_idx_h, geo.scale_idx_v);
761
762         return 0;
763 }
764
765 static int sh_vou_try_fmt_vid_out(struct file *file, void *priv,
766                                   struct v4l2_format *fmt)
767 {
768         struct sh_vou_file *vou_file = priv;
769         struct v4l2_pix_format *pix = &fmt->fmt.pix;
770         int i;
771
772         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
773
774         fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
775         pix->field = V4L2_FIELD_NONE;
776
777         v4l_bound_align_image(&pix->width, 0, VOU_MAX_IMAGE_WIDTH, 1,
778                               &pix->height, 0, VOU_MAX_IMAGE_HEIGHT, 1, 0);
779
780         for (i = 0; ARRAY_SIZE(vou_fmt); i++)
781                 if (vou_fmt[i].pfmt == pix->pixelformat)
782                         return 0;
783
784         pix->pixelformat = vou_fmt[0].pfmt;
785
786         return 0;
787 }
788
789 static int sh_vou_reqbufs(struct file *file, void *priv,
790                           struct v4l2_requestbuffers *req)
791 {
792         struct sh_vou_file *vou_file = priv;
793
794         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
795
796         if (req->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
797                 return -EINVAL;
798
799         return videobuf_reqbufs(&vou_file->vbq, req);
800 }
801
802 static int sh_vou_querybuf(struct file *file, void *priv,
803                            struct v4l2_buffer *b)
804 {
805         struct sh_vou_file *vou_file = priv;
806
807         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
808
809         return videobuf_querybuf(&vou_file->vbq, b);
810 }
811
812 static int sh_vou_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
813 {
814         struct sh_vou_file *vou_file = priv;
815
816         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
817
818         return videobuf_qbuf(&vou_file->vbq, b);
819 }
820
821 static int sh_vou_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
822 {
823         struct sh_vou_file *vou_file = priv;
824
825         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
826
827         return videobuf_dqbuf(&vou_file->vbq, b, file->f_flags & O_NONBLOCK);
828 }
829
830 static int sh_vou_streamon(struct file *file, void *priv,
831                            enum v4l2_buf_type buftype)
832 {
833         struct video_device *vdev = video_devdata(file);
834         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
835         struct sh_vou_file *vou_file = priv;
836         int ret;
837
838         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
839
840         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
841                                          video, s_stream, 1);
842         if (ret < 0 && ret != -ENOIOCTLCMD)
843                 return ret;
844
845         /* This calls our .buf_queue() (== sh_vou_buf_queue) */
846         return videobuf_streamon(&vou_file->vbq);
847 }
848
849 static int sh_vou_streamoff(struct file *file, void *priv,
850                             enum v4l2_buf_type buftype)
851 {
852         struct video_device *vdev = video_devdata(file);
853         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
854         struct sh_vou_file *vou_file = priv;
855
856         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
857
858         /*
859          * This calls buf_release from host driver's videobuf_queue_ops for all
860          * remaining buffers. When the last buffer is freed, stop streaming
861          */
862         videobuf_streamoff(&vou_file->vbq);
863         v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video, s_stream, 0);
864
865         return 0;
866 }
867
868 static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)
869 {
870         switch (bus_fmt) {
871         default:
872                 pr_warning("%s(): Invalid bus-format code %d, using default 8-bit\n",
873                            __func__, bus_fmt);
874         case SH_VOU_BUS_8BIT:
875                 return 1;
876         case SH_VOU_BUS_16BIT:
877                 return 0;
878         case SH_VOU_BUS_BT656:
879                 return 3;
880         }
881 }
882
883 static int sh_vou_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
884 {
885         struct video_device *vdev = video_devdata(file);
886         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
887         int ret;
888
889         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): 0x%llx\n", __func__, *std_id);
890
891         if (*std_id & ~vdev->tvnorms)
892                 return -EINVAL;
893
894         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
895                                          s_std_output, *std_id);
896         /* Shall we continue, if the subdev doesn't support .s_std_output()? */
897         if (ret < 0 && ret != -ENOIOCTLCMD)
898                 return ret;
899
900         if (*std_id & V4L2_STD_525_60)
901                 sh_vou_reg_ab_set(vou_dev, VOUCR,
902                         sh_vou_ntsc_mode(vou_dev->pdata->bus_fmt) << 29, 7 << 29);
903         else
904                 sh_vou_reg_ab_set(vou_dev, VOUCR, 5 << 29, 7 << 29);
905
906         vou_dev->std = *std_id;
907
908         return 0;
909 }
910
911 static int sh_vou_g_std(struct file *file, void *priv, v4l2_std_id *std)
912 {
913         struct video_device *vdev = video_devdata(file);
914         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
915
916         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
917
918         *std = vou_dev->std;
919
920         return 0;
921 }
922
923 static int sh_vou_g_crop(struct file *file, void *fh, struct v4l2_crop *a)
924 {
925         struct video_device *vdev = video_devdata(file);
926         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
927
928         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
929
930         a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
931         a->c = vou_dev->rect;
932
933         return 0;
934 }
935
936 /* Assume a dull encoder, do all the work ourselves. */
937 static int sh_vou_s_crop(struct file *file, void *fh, struct v4l2_crop *a)
938 {
939         struct video_device *vdev = video_devdata(file);
940         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
941         struct v4l2_rect *rect = &a->c;
942         struct v4l2_crop sd_crop = {.type = V4L2_BUF_TYPE_VIDEO_OUTPUT};
943         struct v4l2_pix_format *pix = &vou_dev->pix;
944         struct sh_vou_geometry geo;
945         struct v4l2_mbus_framefmt mbfmt = {
946                 /* Revisit: is this the correct code? */
947                 .code = V4L2_MBUS_FMT_YUYV8_2X8,
948                 .field = V4L2_FIELD_INTERLACED,
949                 .colorspace = V4L2_COLORSPACE_SMPTE170M,
950         };
951         unsigned int img_height_max;
952         int ret;
953
954         dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u@%u:%u\n", __func__,
955                 rect->width, rect->height, rect->left, rect->top);
956
957         if (a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
958                 return -EINVAL;
959
960         if (vou_dev->std & V4L2_STD_525_60)
961                 img_height_max = 480;
962         else
963                 img_height_max = 576;
964
965         v4l_bound_align_image(&rect->width, 0, VOU_MAX_IMAGE_WIDTH, 1,
966                               &rect->height, 0, img_height_max, 1, 0);
967
968         if (rect->width + rect->left > VOU_MAX_IMAGE_WIDTH)
969                 rect->left = VOU_MAX_IMAGE_WIDTH - rect->width;
970
971         if (rect->height + rect->top > img_height_max)
972                 rect->top = img_height_max - rect->height;
973
974         geo.output = *rect;
975         geo.in_width = pix->width;
976         geo.in_height = pix->height;
977
978         /* Configure the encoder one-to-one, position at 0, ignore errors */
979         sd_crop.c.width = geo.output.width;
980         sd_crop.c.height = geo.output.height;
981         /*
982          * We first issue a S_CROP, so that the subsequent S_FMT delivers the
983          * final encoder configuration.
984          */
985         v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
986                                    s_crop, &sd_crop);
987         mbfmt.width = geo.output.width;
988         mbfmt.height = geo.output.height;
989         ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
990                                          s_mbus_fmt, &mbfmt);
991         /* Must be implemented, so, don't check for -ENOIOCTLCMD */
992         if (ret < 0)
993                 return ret;
994
995         /* Sanity checks */
996         if ((unsigned)mbfmt.width > VOU_MAX_IMAGE_WIDTH ||
997             (unsigned)mbfmt.height > img_height_max ||
998             mbfmt.code != V4L2_MBUS_FMT_YUYV8_2X8)
999                 return -EIO;
1000
1001         geo.output.width = mbfmt.width;
1002         geo.output.height = mbfmt.height;
1003
1004         /*
1005          * No down-scaling. According to the API, current call has precedence:
1006          * http://v4l2spec.bytesex.org/spec/x1904.htm#AEN1954 paragraph two.
1007          */
1008         vou_adjust_input(&geo, vou_dev->std);
1009
1010         /* We tried to preserve output rectangle, but it could have changed */
1011         vou_dev->rect = geo.output;
1012         pix->width = geo.in_width;
1013         pix->height = geo.in_height;
1014
1015         sh_vou_configure_geometry(vou_dev, vou_dev->pix_idx,
1016                                   geo.scale_idx_h, geo.scale_idx_v);
1017
1018         return 0;
1019 }
1020
1021 /*
1022  * Total field: NTSC 858 x 2 * 262/263, PAL 864 x 2 * 312/313, default rectangle
1023  * is the initial register values, height takes the interlaced format into
1024  * account. The actual image can only go up to 720 x 2 * 240, So, VOUVPR can
1025  * actually only meaningfully contain values <= 720 and <= 240 respectively, and
1026  * not <= 864 and <= 312.
1027  */
1028 static int sh_vou_cropcap(struct file *file, void *priv,
1029                           struct v4l2_cropcap *a)
1030 {
1031         struct sh_vou_file *vou_file = priv;
1032
1033         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1034
1035         a->type                         = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1036         a->bounds.left                  = 0;
1037         a->bounds.top                   = 0;
1038         a->bounds.width                 = VOU_MAX_IMAGE_WIDTH;
1039         a->bounds.height                = VOU_MAX_IMAGE_HEIGHT;
1040         /* Default = max, set VOUDPR = 0, which is not hardware default */
1041         a->defrect.left                 = 0;
1042         a->defrect.top                  = 0;
1043         a->defrect.width                = VOU_MAX_IMAGE_WIDTH;
1044         a->defrect.height               = VOU_MAX_IMAGE_HEIGHT;
1045         a->pixelaspect.numerator        = 1;
1046         a->pixelaspect.denominator      = 1;
1047
1048         return 0;
1049 }
1050
1051 static irqreturn_t sh_vou_isr(int irq, void *dev_id)
1052 {
1053         struct sh_vou_device *vou_dev = dev_id;
1054         static unsigned long j;
1055         struct videobuf_buffer *vb;
1056         static int cnt;
1057         static int side;
1058         u32 irq_status = sh_vou_reg_a_read(vou_dev, VOUIR), masked;
1059         u32 vou_status = sh_vou_reg_a_read(vou_dev, VOUSTR);
1060
1061         if (!(irq_status & 0x300)) {
1062                 if (printk_timed_ratelimit(&j, 500))
1063                         dev_warn(vou_dev->v4l2_dev.dev, "IRQ status 0x%x!\n",
1064                                  irq_status);
1065                 return IRQ_NONE;
1066         }
1067
1068         spin_lock(&vou_dev->lock);
1069         if (!vou_dev->active || list_empty(&vou_dev->queue)) {
1070                 if (printk_timed_ratelimit(&j, 500))
1071                         dev_warn(vou_dev->v4l2_dev.dev,
1072                                  "IRQ without active buffer: %x!\n", irq_status);
1073                 /* Just ack: buf_release will disable further interrupts */
1074                 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x300);
1075                 spin_unlock(&vou_dev->lock);
1076                 return IRQ_HANDLED;
1077         }
1078
1079         masked = ~(0x300 & irq_status) & irq_status & 0x30304;
1080         dev_dbg(vou_dev->v4l2_dev.dev,
1081                 "IRQ status 0x%x -> 0x%x, VOU status 0x%x, cnt %d\n",
1082                 irq_status, masked, vou_status, cnt);
1083
1084         cnt++;
1085         side = vou_status & 0x10000;
1086
1087         /* Clear only set interrupts */
1088         sh_vou_reg_a_write(vou_dev, VOUIR, masked);
1089
1090         vb = vou_dev->active;
1091         list_del(&vb->queue);
1092
1093         vb->state = VIDEOBUF_DONE;
1094         do_gettimeofday(&vb->ts);
1095         vb->field_count++;
1096         wake_up(&vb->done);
1097
1098         if (list_empty(&vou_dev->queue)) {
1099                 /* Stop VOU */
1100                 dev_dbg(vou_dev->v4l2_dev.dev, "%s: queue empty after %d\n",
1101                         __func__, cnt);
1102                 sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
1103                 vou_dev->active = NULL;
1104                 vou_dev->status = SH_VOU_INITIALISING;
1105                 /* Disable End-of-Frame (VSYNC) interrupts */
1106                 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
1107                 spin_unlock(&vou_dev->lock);
1108                 return IRQ_HANDLED;
1109         }
1110
1111         vou_dev->active = list_entry(vou_dev->queue.next,
1112                                      struct videobuf_buffer, queue);
1113
1114         if (vou_dev->active->queue.next != &vou_dev->queue) {
1115                 struct videobuf_buffer *new = list_entry(vou_dev->active->queue.next,
1116                                                 struct videobuf_buffer, queue);
1117                 sh_vou_schedule_next(vou_dev, new);
1118         }
1119
1120         spin_unlock(&vou_dev->lock);
1121
1122         return IRQ_HANDLED;
1123 }
1124
1125 static int sh_vou_hw_init(struct sh_vou_device *vou_dev)
1126 {
1127         struct sh_vou_pdata *pdata = vou_dev->pdata;
1128         u32 voucr = sh_vou_ntsc_mode(pdata->bus_fmt) << 29;
1129         int i = 100;
1130
1131         /* Disable all IRQs */
1132         sh_vou_reg_a_write(vou_dev, VOUIR, 0);
1133
1134         /* Reset VOU interfaces - registers unaffected */
1135         sh_vou_reg_a_write(vou_dev, VOUSRR, 0x101);
1136         while (--i && (sh_vou_reg_a_read(vou_dev, VOUSRR) & 0x101))
1137                 udelay(1);
1138
1139         if (!i)
1140                 return -ETIMEDOUT;
1141
1142         dev_dbg(vou_dev->v4l2_dev.dev, "Reset took %dus\n", 100 - i);
1143
1144         if (pdata->flags & SH_VOU_PCLK_FALLING)
1145                 voucr |= 1 << 28;
1146         if (pdata->flags & SH_VOU_HSYNC_LOW)
1147                 voucr |= 1 << 27;
1148         if (pdata->flags & SH_VOU_VSYNC_LOW)
1149                 voucr |= 1 << 26;
1150         sh_vou_reg_ab_set(vou_dev, VOUCR, voucr, 0xfc000000);
1151
1152         /* Manual register side switching at first */
1153         sh_vou_reg_a_write(vou_dev, VOURCR, 4);
1154         /* Default - fixed HSYNC length, can be made configurable is required */
1155         sh_vou_reg_ab_write(vou_dev, VOUMSR, 0x800000);
1156
1157         return 0;
1158 }
1159
1160 /* File operations */
1161 static int sh_vou_open(struct file *file)
1162 {
1163         struct video_device *vdev = video_devdata(file);
1164         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1165         struct sh_vou_file *vou_file = kzalloc(sizeof(struct sh_vou_file),
1166                                                GFP_KERNEL);
1167
1168         if (!vou_file)
1169                 return -ENOMEM;
1170
1171         dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
1172
1173         file->private_data = vou_file;
1174
1175         if (atomic_inc_return(&vou_dev->use_count) == 1) {
1176                 int ret;
1177                 /* First open */
1178                 vou_dev->status = SH_VOU_INITIALISING;
1179                 pm_runtime_get_sync(vdev->v4l2_dev->dev);
1180                 ret = sh_vou_hw_init(vou_dev);
1181                 if (ret < 0) {
1182                         atomic_dec(&vou_dev->use_count);
1183                         pm_runtime_put(vdev->v4l2_dev->dev);
1184                         vou_dev->status = SH_VOU_IDLE;
1185                         return ret;
1186                 }
1187         }
1188
1189         videobuf_queue_dma_contig_init(&vou_file->vbq, &sh_vou_video_qops,
1190                                        vou_dev->v4l2_dev.dev, &vou_dev->lock,
1191                                        V4L2_BUF_TYPE_VIDEO_OUTPUT,
1192                                        V4L2_FIELD_NONE,
1193                                        sizeof(struct videobuf_buffer), vdev,
1194                                        &vou_dev->fop_lock);
1195
1196         return 0;
1197 }
1198
1199 static int sh_vou_release(struct file *file)
1200 {
1201         struct video_device *vdev = video_devdata(file);
1202         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1203         struct sh_vou_file *vou_file = file->private_data;
1204
1205         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1206
1207         if (!atomic_dec_return(&vou_dev->use_count)) {
1208                 /* Last close */
1209                 vou_dev->status = SH_VOU_IDLE;
1210                 sh_vou_reg_a_set(vou_dev, VOUER, 0, 0x101);
1211                 pm_runtime_put(vdev->v4l2_dev->dev);
1212         }
1213
1214         file->private_data = NULL;
1215         kfree(vou_file);
1216
1217         return 0;
1218 }
1219
1220 static int sh_vou_mmap(struct file *file, struct vm_area_struct *vma)
1221 {
1222         struct sh_vou_file *vou_file = file->private_data;
1223
1224         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1225
1226         return videobuf_mmap_mapper(&vou_file->vbq, vma);
1227 }
1228
1229 static unsigned int sh_vou_poll(struct file *file, poll_table *wait)
1230 {
1231         struct sh_vou_file *vou_file = file->private_data;
1232
1233         dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1234
1235         return videobuf_poll_stream(file, &vou_file->vbq, wait);
1236 }
1237
1238 static int sh_vou_g_chip_ident(struct file *file, void *fh,
1239                                    struct v4l2_dbg_chip_ident *id)
1240 {
1241         struct video_device *vdev = video_devdata(file);
1242         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1243
1244         return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, g_chip_ident, id);
1245 }
1246
1247 #ifdef CONFIG_VIDEO_ADV_DEBUG
1248 static int sh_vou_g_register(struct file *file, void *fh,
1249                                  struct v4l2_dbg_register *reg)
1250 {
1251         struct video_device *vdev = video_devdata(file);
1252         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1253
1254         return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, g_register, reg);
1255 }
1256
1257 static int sh_vou_s_register(struct file *file, void *fh,
1258                                  struct v4l2_dbg_register *reg)
1259 {
1260         struct video_device *vdev = video_devdata(file);
1261         struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1262
1263         return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, s_register, reg);
1264 }
1265 #endif
1266
1267 /* sh_vou display ioctl operations */
1268 static const struct v4l2_ioctl_ops sh_vou_ioctl_ops = {
1269         .vidioc_querycap                = sh_vou_querycap,
1270         .vidioc_enum_fmt_vid_out        = sh_vou_enum_fmt_vid_out,
1271         .vidioc_g_fmt_vid_out           = sh_vou_g_fmt_vid_out,
1272         .vidioc_s_fmt_vid_out           = sh_vou_s_fmt_vid_out,
1273         .vidioc_try_fmt_vid_out         = sh_vou_try_fmt_vid_out,
1274         .vidioc_reqbufs                 = sh_vou_reqbufs,
1275         .vidioc_querybuf                = sh_vou_querybuf,
1276         .vidioc_qbuf                    = sh_vou_qbuf,
1277         .vidioc_dqbuf                   = sh_vou_dqbuf,
1278         .vidioc_streamon                = sh_vou_streamon,
1279         .vidioc_streamoff               = sh_vou_streamoff,
1280         .vidioc_s_std                   = sh_vou_s_std,
1281         .vidioc_g_std                   = sh_vou_g_std,
1282         .vidioc_cropcap                 = sh_vou_cropcap,
1283         .vidioc_g_crop                  = sh_vou_g_crop,
1284         .vidioc_s_crop                  = sh_vou_s_crop,
1285         .vidioc_g_chip_ident            = sh_vou_g_chip_ident,
1286 #ifdef CONFIG_VIDEO_ADV_DEBUG
1287         .vidioc_g_register              = sh_vou_g_register,
1288         .vidioc_s_register              = sh_vou_s_register,
1289 #endif
1290 };
1291
1292 static const struct v4l2_file_operations sh_vou_fops = {
1293         .owner          = THIS_MODULE,
1294         .open           = sh_vou_open,
1295         .release        = sh_vou_release,
1296         .unlocked_ioctl = video_ioctl2,
1297         .mmap           = sh_vou_mmap,
1298         .poll           = sh_vou_poll,
1299 };
1300
1301 static const struct video_device sh_vou_video_template = {
1302         .name           = "sh_vou",
1303         .fops           = &sh_vou_fops,
1304         .ioctl_ops      = &sh_vou_ioctl_ops,
1305         .tvnorms        = V4L2_STD_525_60, /* PAL only supported in 8-bit non-bt656 mode */
1306         .current_norm   = V4L2_STD_NTSC_M,
1307 };
1308
1309 static int __devinit sh_vou_probe(struct platform_device *pdev)
1310 {
1311         struct sh_vou_pdata *vou_pdata = pdev->dev.platform_data;
1312         struct v4l2_rect *rect;
1313         struct v4l2_pix_format *pix;
1314         struct i2c_adapter *i2c_adap;
1315         struct video_device *vdev;
1316         struct sh_vou_device *vou_dev;
1317         struct resource *reg_res, *region;
1318         struct v4l2_subdev *subdev;
1319         int irq, ret;
1320
1321         reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1322         irq = platform_get_irq(pdev, 0);
1323
1324         if (!vou_pdata || !reg_res || irq <= 0) {
1325                 dev_err(&pdev->dev, "Insufficient VOU platform information.\n");
1326                 return -ENODEV;
1327         }
1328
1329         vou_dev = kzalloc(sizeof(*vou_dev), GFP_KERNEL);
1330         if (!vou_dev)
1331                 return -ENOMEM;
1332
1333         INIT_LIST_HEAD(&vou_dev->queue);
1334         spin_lock_init(&vou_dev->lock);
1335         mutex_init(&vou_dev->fop_lock);
1336         atomic_set(&vou_dev->use_count, 0);
1337         vou_dev->pdata = vou_pdata;
1338         vou_dev->status = SH_VOU_IDLE;
1339
1340         rect = &vou_dev->rect;
1341         pix = &vou_dev->pix;
1342
1343         /* Fill in defaults */
1344         vou_dev->std            = sh_vou_video_template.current_norm;
1345         rect->left              = 0;
1346         rect->top               = 0;
1347         rect->width             = VOU_MAX_IMAGE_WIDTH;
1348         rect->height            = 480;
1349         pix->width              = VOU_MAX_IMAGE_WIDTH;
1350         pix->height             = 480;
1351         pix->pixelformat        = V4L2_PIX_FMT_YVYU;
1352         pix->field              = V4L2_FIELD_NONE;
1353         pix->bytesperline       = VOU_MAX_IMAGE_WIDTH * 2;
1354         pix->sizeimage          = VOU_MAX_IMAGE_WIDTH * 2 * 480;
1355         pix->colorspace         = V4L2_COLORSPACE_SMPTE170M;
1356
1357         region = request_mem_region(reg_res->start, resource_size(reg_res),
1358                                     pdev->name);
1359         if (!region) {
1360                 dev_err(&pdev->dev, "VOU region already claimed\n");
1361                 ret = -EBUSY;
1362                 goto ereqmemreg;
1363         }
1364
1365         vou_dev->base = ioremap(reg_res->start, resource_size(reg_res));
1366         if (!vou_dev->base) {
1367                 ret = -ENOMEM;
1368                 goto emap;
1369         }
1370
1371         ret = request_irq(irq, sh_vou_isr, 0, "vou", vou_dev);
1372         if (ret < 0)
1373                 goto ereqirq;
1374
1375         ret = v4l2_device_register(&pdev->dev, &vou_dev->v4l2_dev);
1376         if (ret < 0) {
1377                 dev_err(&pdev->dev, "Error registering v4l2 device\n");
1378                 goto ev4l2devreg;
1379         }
1380
1381         /* Allocate memory for video device */
1382         vdev = video_device_alloc();
1383         if (vdev == NULL) {
1384                 ret = -ENOMEM;
1385                 goto evdevalloc;
1386         }
1387
1388         *vdev = sh_vou_video_template;
1389         if (vou_pdata->bus_fmt == SH_VOU_BUS_8BIT)
1390                 vdev->tvnorms |= V4L2_STD_PAL;
1391         vdev->v4l2_dev = &vou_dev->v4l2_dev;
1392         vdev->release = video_device_release;
1393         vdev->lock = &vou_dev->fop_lock;
1394
1395         vou_dev->vdev = vdev;
1396         video_set_drvdata(vdev, vou_dev);
1397
1398         pm_runtime_enable(&pdev->dev);
1399         pm_runtime_resume(&pdev->dev);
1400
1401         i2c_adap = i2c_get_adapter(vou_pdata->i2c_adap);
1402         if (!i2c_adap) {
1403                 ret = -ENODEV;
1404                 goto ei2cgadap;
1405         }
1406
1407         ret = sh_vou_hw_init(vou_dev);
1408         if (ret < 0)
1409                 goto ereset;
1410
1411         subdev = v4l2_i2c_new_subdev_board(&vou_dev->v4l2_dev, i2c_adap,
1412                         vou_pdata->board_info, NULL);
1413         if (!subdev) {
1414                 ret = -ENOMEM;
1415                 goto ei2cnd;
1416         }
1417
1418         ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1419         if (ret < 0)
1420                 goto evregdev;
1421
1422         return 0;
1423
1424 evregdev:
1425 ei2cnd:
1426 ereset:
1427         i2c_put_adapter(i2c_adap);
1428 ei2cgadap:
1429         video_device_release(vdev);
1430         pm_runtime_disable(&pdev->dev);
1431 evdevalloc:
1432         v4l2_device_unregister(&vou_dev->v4l2_dev);
1433 ev4l2devreg:
1434         free_irq(irq, vou_dev);
1435 ereqirq:
1436         iounmap(vou_dev->base);
1437 emap:
1438         release_mem_region(reg_res->start, resource_size(reg_res));
1439 ereqmemreg:
1440         kfree(vou_dev);
1441         return ret;
1442 }
1443
1444 static int __devexit sh_vou_remove(struct platform_device *pdev)
1445 {
1446         int irq = platform_get_irq(pdev, 0);
1447         struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1448         struct sh_vou_device *vou_dev = container_of(v4l2_dev,
1449                                                 struct sh_vou_device, v4l2_dev);
1450         struct v4l2_subdev *sd = list_entry(v4l2_dev->subdevs.next,
1451                                             struct v4l2_subdev, list);
1452         struct i2c_client *client = v4l2_get_subdevdata(sd);
1453         struct resource *reg_res;
1454
1455         if (irq > 0)
1456                 free_irq(irq, vou_dev);
1457         pm_runtime_disable(&pdev->dev);
1458         video_unregister_device(vou_dev->vdev);
1459         i2c_put_adapter(client->adapter);
1460         v4l2_device_unregister(&vou_dev->v4l2_dev);
1461         iounmap(vou_dev->base);
1462         reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1463         if (reg_res)
1464                 release_mem_region(reg_res->start, resource_size(reg_res));
1465         kfree(vou_dev);
1466         return 0;
1467 }
1468
1469 static struct platform_driver __refdata sh_vou = {
1470         .remove  = __devexit_p(sh_vou_remove),
1471         .driver  = {
1472                 .name   = "sh-vou",
1473                 .owner  = THIS_MODULE,
1474         },
1475 };
1476
1477 static int __init sh_vou_init(void)
1478 {
1479         return platform_driver_probe(&sh_vou, sh_vou_probe);
1480 }
1481
1482 static void __exit sh_vou_exit(void)
1483 {
1484         platform_driver_unregister(&sh_vou);
1485 }
1486
1487 module_init(sh_vou_init);
1488 module_exit(sh_vou_exit);
1489
1490 MODULE_DESCRIPTION("SuperH VOU driver");
1491 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1492 MODULE_LICENSE("GPL v2");
1493 MODULE_ALIAS("platform:sh-vou");