1 /*
2 * SuperH Video Output Unit (VOU) driver
3 *
4 * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 */
10
11 #include <linux/dma-mapping.h>
12 #include <linux/delay.h>
13 #include <linux/errno.h>
14 #include <linux/fs.h>
15 #include <linux/i2c.h>
16 #include <linux/init.h>
17 #include <linux/interrupt.h>
18 #include <linux/kernel.h>
19 #include <linux/platform_device.h>
20 #include <linux/pm_runtime.h>
21 #include <linux/slab.h>
22 #include <linux/videodev2.h>
23 #include <linux/module.h>
24
25 #include <media/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 */
sh_vou_reg_a_write(struct sh_vou_device * vou_dev,unsigned int reg,u32 value)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
sh_vou_reg_ab_write(struct sh_vou_device * vou_dev,unsigned int reg,u32 value)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
sh_vou_reg_m_write(struct sh_vou_device * vou_dev,unsigned int reg,u32 value)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
sh_vou_reg_a_read(struct sh_vou_device * vou_dev,unsigned int reg)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
sh_vou_reg_a_set(struct sh_vou_device * vou_dev,unsigned int reg,u32 value,u32 mask)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
sh_vou_reg_b_set(struct sh_vou_device * vou_dev,unsigned int reg,u32 value,u32 mask)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
sh_vou_reg_ab_set(struct sh_vou_device * vou_dev,unsigned int reg,u32 value,u32 mask)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
sh_vou_schedule_next(struct sh_vou_device * vou_dev,struct videobuf_buffer * vb)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
sh_vou_stream_start(struct sh_vou_device * vou_dev,struct videobuf_buffer * vb)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 default:
211 case V4L2_PIX_FMT_NV12:
212 case V4L2_PIX_FMT_NV16:
213 row_coeff = 1;
214 break;
215 case V4L2_PIX_FMT_RGB565:
216 dataswap ^= 1;
217 case V4L2_PIX_FMT_RGB565X:
218 row_coeff = 2;
219 break;
220 case V4L2_PIX_FMT_RGB24:
221 row_coeff = 3;
222 break;
223 }
224
225 sh_vou_reg_a_write(vou_dev, VOUSWR, dataswap);
226 sh_vou_reg_ab_write(vou_dev, VOUAIR, vou_dev->pix.width * row_coeff);
227 sh_vou_schedule_next(vou_dev, vb);
228 }
229
free_buffer(struct videobuf_queue * vq,struct videobuf_buffer * vb)230 static void free_buffer(struct videobuf_queue *vq, struct videobuf_buffer *vb)
231 {
232 BUG_ON(in_interrupt());
233
234 /* Wait until this buffer is no longer in STATE_QUEUED or STATE_ACTIVE */
235 videobuf_waiton(vq, vb, 0, 0);
236 videobuf_dma_contig_free(vq, vb);
237 vb->state = VIDEOBUF_NEEDS_INIT;
238 }
239
240 /* Locking: caller holds fop_lock mutex */
sh_vou_buf_setup(struct videobuf_queue * vq,unsigned int * count,unsigned int * size)241 static int sh_vou_buf_setup(struct videobuf_queue *vq, unsigned int *count,
242 unsigned int *size)
243 {
244 struct video_device *vdev = vq->priv_data;
245 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
246
247 *size = vou_fmt[vou_dev->pix_idx].bpp * vou_dev->pix.width *
248 vou_dev->pix.height / 8;
249
250 if (*count < 2)
251 *count = 2;
252
253 /* Taking into account maximum frame size, *count will stay >= 2 */
254 if (PAGE_ALIGN(*size) * *count > 4 * 1024 * 1024)
255 *count = 4 * 1024 * 1024 / PAGE_ALIGN(*size);
256
257 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): count=%d, size=%d\n", __func__,
258 *count, *size);
259
260 return 0;
261 }
262
263 /* Locking: caller holds fop_lock mutex */
sh_vou_buf_prepare(struct videobuf_queue * vq,struct videobuf_buffer * vb,enum v4l2_field field)264 static int sh_vou_buf_prepare(struct videobuf_queue *vq,
265 struct videobuf_buffer *vb,
266 enum v4l2_field field)
267 {
268 struct video_device *vdev = vq->priv_data;
269 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
270 struct v4l2_pix_format *pix = &vou_dev->pix;
271 int bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
272 int ret;
273
274 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
275
276 if (vb->width != pix->width ||
277 vb->height != pix->height ||
278 vb->field != pix->field) {
279 vb->width = pix->width;
280 vb->height = pix->height;
281 vb->field = field;
282 if (vb->state != VIDEOBUF_NEEDS_INIT)
283 free_buffer(vq, vb);
284 }
285
286 vb->size = vb->height * bytes_per_line;
287 if (vb->baddr && vb->bsize < vb->size) {
288 /* User buffer too small */
289 dev_warn(vq->dev, "User buffer too small: [%u] @ %lx\n",
290 vb->bsize, vb->baddr);
291 return -EINVAL;
292 }
293
294 if (vb->state == VIDEOBUF_NEEDS_INIT) {
295 ret = videobuf_iolock(vq, vb, NULL);
296 if (ret < 0) {
297 dev_warn(vq->dev, "IOLOCK buf-type %d: %d\n",
298 vb->memory, ret);
299 return ret;
300 }
301 vb->state = VIDEOBUF_PREPARED;
302 }
303
304 dev_dbg(vou_dev->v4l2_dev.dev,
305 "%s(): fmt #%d, %u bytes per line, phys 0x%x, type %d, state %d\n",
306 __func__, vou_dev->pix_idx, bytes_per_line,
307 videobuf_to_dma_contig(vb), vb->memory, vb->state);
308
309 return 0;
310 }
311
312 /* Locking: caller holds fop_lock mutex and vq->irqlock spinlock */
sh_vou_buf_queue(struct videobuf_queue * vq,struct videobuf_buffer * vb)313 static void sh_vou_buf_queue(struct videobuf_queue *vq,
314 struct videobuf_buffer *vb)
315 {
316 struct video_device *vdev = vq->priv_data;
317 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
318
319 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
320
321 vb->state = VIDEOBUF_QUEUED;
322 list_add_tail(&vb->queue, &vou_dev->queue);
323
324 if (vou_dev->status == SH_VOU_RUNNING) {
325 return;
326 } else if (!vou_dev->active) {
327 vou_dev->active = vb;
328 /* Start from side A: we use mirror addresses, so, set B */
329 sh_vou_reg_a_write(vou_dev, VOURPR, 1);
330 dev_dbg(vou_dev->v4l2_dev.dev, "%s: first buffer status 0x%x\n",
331 __func__, sh_vou_reg_a_read(vou_dev, VOUSTR));
332 sh_vou_schedule_next(vou_dev, vb);
333 /* Only activate VOU after the second buffer */
334 } else if (vou_dev->active->queue.next == &vb->queue) {
335 /* Second buffer - initialise register side B */
336 sh_vou_reg_a_write(vou_dev, VOURPR, 0);
337 sh_vou_stream_start(vou_dev, vb);
338
339 /* Register side switching with frame VSYNC */
340 sh_vou_reg_a_write(vou_dev, VOURCR, 5);
341 dev_dbg(vou_dev->v4l2_dev.dev, "%s: second buffer status 0x%x\n",
342 __func__, sh_vou_reg_a_read(vou_dev, VOUSTR));
343
344 /* Enable End-of-Frame (VSYNC) interrupts */
345 sh_vou_reg_a_write(vou_dev, VOUIR, 0x10004);
346 /* Two buffers on the queue - activate the hardware */
347
348 vou_dev->status = SH_VOU_RUNNING;
349 sh_vou_reg_a_write(vou_dev, VOUER, 0x107);
350 }
351 }
352
sh_vou_buf_release(struct videobuf_queue * vq,struct videobuf_buffer * vb)353 static void sh_vou_buf_release(struct videobuf_queue *vq,
354 struct videobuf_buffer *vb)
355 {
356 struct video_device *vdev = vq->priv_data;
357 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
358 unsigned long flags;
359
360 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
361
362 spin_lock_irqsave(&vou_dev->lock, flags);
363
364 if (vou_dev->active == vb) {
365 /* disable output */
366 sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
367 /* ...but the current frame will complete */
368 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
369 vou_dev->active = NULL;
370 }
371
372 if ((vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED)) {
373 vb->state = VIDEOBUF_ERROR;
374 list_del(&vb->queue);
375 }
376
377 spin_unlock_irqrestore(&vou_dev->lock, flags);
378
379 free_buffer(vq, vb);
380 }
381
382 static struct videobuf_queue_ops sh_vou_video_qops = {
383 .buf_setup = sh_vou_buf_setup,
384 .buf_prepare = sh_vou_buf_prepare,
385 .buf_queue = sh_vou_buf_queue,
386 .buf_release = sh_vou_buf_release,
387 };
388
389 /* Video IOCTLs */
sh_vou_querycap(struct file * file,void * priv,struct v4l2_capability * cap)390 static int sh_vou_querycap(struct file *file, void *priv,
391 struct v4l2_capability *cap)
392 {
393 struct sh_vou_device *vou_dev = video_drvdata(file);
394
395 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
396
397 strlcpy(cap->card, "SuperH VOU", sizeof(cap->card));
398 cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
399 return 0;
400 }
401
402 /* Enumerate formats, that the device can accept from the user */
sh_vou_enum_fmt_vid_out(struct file * file,void * priv,struct v4l2_fmtdesc * fmt)403 static int sh_vou_enum_fmt_vid_out(struct file *file, void *priv,
404 struct v4l2_fmtdesc *fmt)
405 {
406 struct sh_vou_device *vou_dev = video_drvdata(file);
407
408 if (fmt->index >= ARRAY_SIZE(vou_fmt))
409 return -EINVAL;
410
411 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
412
413 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
414 strlcpy(fmt->description, vou_fmt[fmt->index].desc,
415 sizeof(fmt->description));
416 fmt->pixelformat = vou_fmt[fmt->index].pfmt;
417
418 return 0;
419 }
420
sh_vou_g_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * fmt)421 static int sh_vou_g_fmt_vid_out(struct file *file, void *priv,
422 struct v4l2_format *fmt)
423 {
424 struct sh_vou_device *vou_dev = video_drvdata(file);
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
sh_vou_configure_geometry(struct sh_vou_device * vou_dev,int pix_idx,int w_idx,int h_idx)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 */
vou_adjust_input(struct sh_vou_geometry * geo,v4l2_std_id std)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 */
vou_adjust_output(struct sh_vou_geometry * geo,v4l2_std_id std)597 static void vou_adjust_output(struct sh_vou_geometry *geo, v4l2_std_id std)
598 {
599 unsigned int best_err = UINT_MAX, best = geo->in_width,
600 width_max, height_max, img_height_max;
601 int i, idx = 0;
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
sh_vou_s_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * fmt)672 static int sh_vou_s_fmt_vid_out(struct file *file, void *priv,
673 struct v4l2_format *fmt)
674 {
675 struct sh_vou_device *vou_dev = video_drvdata(file);
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
sh_vou_try_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * fmt)764 static int sh_vou_try_fmt_vid_out(struct file *file, void *priv,
765 struct v4l2_format *fmt)
766 {
767 struct sh_vou_device *vou_dev = video_drvdata(file);
768 struct v4l2_pix_format *pix = &fmt->fmt.pix;
769 int i;
770
771 dev_dbg(vou_dev->v4l2_dev.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
sh_vou_reqbufs(struct file * file,void * priv,struct v4l2_requestbuffers * req)788 static int sh_vou_reqbufs(struct file *file, void *priv,
789 struct v4l2_requestbuffers *req)
790 {
791 struct sh_vou_device *vou_dev = video_drvdata(file);
792 struct sh_vou_file *vou_file = priv;
793
794 dev_dbg(vou_dev->v4l2_dev.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
sh_vou_querybuf(struct file * file,void * priv,struct v4l2_buffer * b)802 static int sh_vou_querybuf(struct file *file, void *priv,
803 struct v4l2_buffer *b)
804 {
805 struct sh_vou_device *vou_dev = video_drvdata(file);
806 struct sh_vou_file *vou_file = priv;
807
808 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
809
810 return videobuf_querybuf(&vou_file->vbq, b);
811 }
812
sh_vou_qbuf(struct file * file,void * priv,struct v4l2_buffer * b)813 static int sh_vou_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
814 {
815 struct sh_vou_device *vou_dev = video_drvdata(file);
816 struct sh_vou_file *vou_file = priv;
817
818 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
819
820 return videobuf_qbuf(&vou_file->vbq, b);
821 }
822
sh_vou_dqbuf(struct file * file,void * priv,struct v4l2_buffer * b)823 static int sh_vou_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
824 {
825 struct sh_vou_device *vou_dev = video_drvdata(file);
826 struct sh_vou_file *vou_file = priv;
827
828 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
829
830 return videobuf_dqbuf(&vou_file->vbq, b, file->f_flags & O_NONBLOCK);
831 }
832
sh_vou_streamon(struct file * file,void * priv,enum v4l2_buf_type buftype)833 static int sh_vou_streamon(struct file *file, void *priv,
834 enum v4l2_buf_type buftype)
835 {
836 struct sh_vou_device *vou_dev = video_drvdata(file);
837 struct sh_vou_file *vou_file = priv;
838 int ret;
839
840 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
841
842 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
843 video, s_stream, 1);
844 if (ret < 0 && ret != -ENOIOCTLCMD)
845 return ret;
846
847 /* This calls our .buf_queue() (== sh_vou_buf_queue) */
848 return videobuf_streamon(&vou_file->vbq);
849 }
850
sh_vou_streamoff(struct file * file,void * priv,enum v4l2_buf_type buftype)851 static int sh_vou_streamoff(struct file *file, void *priv,
852 enum v4l2_buf_type buftype)
853 {
854 struct sh_vou_device *vou_dev = video_drvdata(file);
855 struct sh_vou_file *vou_file = priv;
856
857 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
858
859 /*
860 * This calls buf_release from host driver's videobuf_queue_ops for all
861 * remaining buffers. When the last buffer is freed, stop streaming
862 */
863 videobuf_streamoff(&vou_file->vbq);
864 v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video, s_stream, 0);
865
866 return 0;
867 }
868
sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)869 static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)
870 {
871 switch (bus_fmt) {
872 default:
873 pr_warning("%s(): Invalid bus-format code %d, using default 8-bit\n",
874 __func__, bus_fmt);
875 case SH_VOU_BUS_8BIT:
876 return 1;
877 case SH_VOU_BUS_16BIT:
878 return 0;
879 case SH_VOU_BUS_BT656:
880 return 3;
881 }
882 }
883
sh_vou_s_std(struct file * file,void * priv,v4l2_std_id std_id)884 static int sh_vou_s_std(struct file *file, void *priv, v4l2_std_id std_id)
885 {
886 struct sh_vou_device *vou_dev = video_drvdata(file);
887 int ret;
888
889 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): 0x%llx\n", __func__, std_id);
890
891 if (std_id & ~vou_dev->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
sh_vou_g_std(struct file * file,void * priv,v4l2_std_id * std)911 static int sh_vou_g_std(struct file *file, void *priv, v4l2_std_id *std)
912 {
913 struct sh_vou_device *vou_dev = video_drvdata(file);
914
915 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
916
917 *std = vou_dev->std;
918
919 return 0;
920 }
921
sh_vou_g_crop(struct file * file,void * fh,struct v4l2_crop * a)922 static int sh_vou_g_crop(struct file *file, void *fh, struct v4l2_crop *a)
923 {
924 struct sh_vou_device *vou_dev = video_drvdata(file);
925
926 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
927
928 a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
929 a->c = vou_dev->rect;
930
931 return 0;
932 }
933
934 /* Assume a dull encoder, do all the work ourselves. */
sh_vou_s_crop(struct file * file,void * fh,const struct v4l2_crop * a)935 static int sh_vou_s_crop(struct file *file, void *fh, const struct v4l2_crop *a)
936 {
937 struct v4l2_crop a_writable = *a;
938 struct sh_vou_device *vou_dev = video_drvdata(file);
939 struct v4l2_rect *rect = &a_writable.c;
940 struct v4l2_crop sd_crop = {.type = V4L2_BUF_TYPE_VIDEO_OUTPUT};
941 struct v4l2_pix_format *pix = &vou_dev->pix;
942 struct sh_vou_geometry geo;
943 struct v4l2_mbus_framefmt mbfmt = {
944 /* Revisit: is this the correct code? */
945 .code = V4L2_MBUS_FMT_YUYV8_2X8,
946 .field = V4L2_FIELD_INTERLACED,
947 .colorspace = V4L2_COLORSPACE_SMPTE170M,
948 };
949 unsigned int img_height_max;
950 int ret;
951
952 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u@%u:%u\n", __func__,
953 rect->width, rect->height, rect->left, rect->top);
954
955 if (a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
956 return -EINVAL;
957
958 if (vou_dev->std & V4L2_STD_525_60)
959 img_height_max = 480;
960 else
961 img_height_max = 576;
962
963 v4l_bound_align_image(&rect->width, 0, VOU_MAX_IMAGE_WIDTH, 1,
964 &rect->height, 0, img_height_max, 1, 0);
965
966 if (rect->width + rect->left > VOU_MAX_IMAGE_WIDTH)
967 rect->left = VOU_MAX_IMAGE_WIDTH - rect->width;
968
969 if (rect->height + rect->top > img_height_max)
970 rect->top = img_height_max - rect->height;
971
972 geo.output = *rect;
973 geo.in_width = pix->width;
974 geo.in_height = pix->height;
975
976 /* Configure the encoder one-to-one, position at 0, ignore errors */
977 sd_crop.c.width = geo.output.width;
978 sd_crop.c.height = geo.output.height;
979 /*
980 * We first issue a S_CROP, so that the subsequent S_FMT delivers the
981 * final encoder configuration.
982 */
983 v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
984 s_crop, &sd_crop);
985 mbfmt.width = geo.output.width;
986 mbfmt.height = geo.output.height;
987 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
988 s_mbus_fmt, &mbfmt);
989 /* Must be implemented, so, don't check for -ENOIOCTLCMD */
990 if (ret < 0)
991 return ret;
992
993 /* Sanity checks */
994 if ((unsigned)mbfmt.width > VOU_MAX_IMAGE_WIDTH ||
995 (unsigned)mbfmt.height > img_height_max ||
996 mbfmt.code != V4L2_MBUS_FMT_YUYV8_2X8)
997 return -EIO;
998
999 geo.output.width = mbfmt.width;
1000 geo.output.height = mbfmt.height;
1001
1002 /*
1003 * No down-scaling. According to the API, current call has precedence:
1004 * http://v4l2spec.bytesex.org/spec/x1904.htm#AEN1954 paragraph two.
1005 */
1006 vou_adjust_input(&geo, vou_dev->std);
1007
1008 /* We tried to preserve output rectangle, but it could have changed */
1009 vou_dev->rect = geo.output;
1010 pix->width = geo.in_width;
1011 pix->height = geo.in_height;
1012
1013 sh_vou_configure_geometry(vou_dev, vou_dev->pix_idx,
1014 geo.scale_idx_h, geo.scale_idx_v);
1015
1016 return 0;
1017 }
1018
1019 /*
1020 * Total field: NTSC 858 x 2 * 262/263, PAL 864 x 2 * 312/313, default rectangle
1021 * is the initial register values, height takes the interlaced format into
1022 * account. The actual image can only go up to 720 x 2 * 240, So, VOUVPR can
1023 * actually only meaningfully contain values <= 720 and <= 240 respectively, and
1024 * not <= 864 and <= 312.
1025 */
sh_vou_cropcap(struct file * file,void * priv,struct v4l2_cropcap * a)1026 static int sh_vou_cropcap(struct file *file, void *priv,
1027 struct v4l2_cropcap *a)
1028 {
1029 struct sh_vou_device *vou_dev = video_drvdata(file);
1030
1031 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
1032
1033 a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1034 a->bounds.left = 0;
1035 a->bounds.top = 0;
1036 a->bounds.width = VOU_MAX_IMAGE_WIDTH;
1037 a->bounds.height = VOU_MAX_IMAGE_HEIGHT;
1038 /* Default = max, set VOUDPR = 0, which is not hardware default */
1039 a->defrect.left = 0;
1040 a->defrect.top = 0;
1041 a->defrect.width = VOU_MAX_IMAGE_WIDTH;
1042 a->defrect.height = VOU_MAX_IMAGE_HEIGHT;
1043 a->pixelaspect.numerator = 1;
1044 a->pixelaspect.denominator = 1;
1045
1046 return 0;
1047 }
1048
sh_vou_isr(int irq,void * dev_id)1049 static irqreturn_t sh_vou_isr(int irq, void *dev_id)
1050 {
1051 struct sh_vou_device *vou_dev = dev_id;
1052 static unsigned long j;
1053 struct videobuf_buffer *vb;
1054 static int cnt;
1055 static int side;
1056 u32 irq_status = sh_vou_reg_a_read(vou_dev, VOUIR), masked;
1057 u32 vou_status = sh_vou_reg_a_read(vou_dev, VOUSTR);
1058
1059 if (!(irq_status & 0x300)) {
1060 if (printk_timed_ratelimit(&j, 500))
1061 dev_warn(vou_dev->v4l2_dev.dev, "IRQ status 0x%x!\n",
1062 irq_status);
1063 return IRQ_NONE;
1064 }
1065
1066 spin_lock(&vou_dev->lock);
1067 if (!vou_dev->active || list_empty(&vou_dev->queue)) {
1068 if (printk_timed_ratelimit(&j, 500))
1069 dev_warn(vou_dev->v4l2_dev.dev,
1070 "IRQ without active buffer: %x!\n", irq_status);
1071 /* Just ack: buf_release will disable further interrupts */
1072 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x300);
1073 spin_unlock(&vou_dev->lock);
1074 return IRQ_HANDLED;
1075 }
1076
1077 masked = ~(0x300 & irq_status) & irq_status & 0x30304;
1078 dev_dbg(vou_dev->v4l2_dev.dev,
1079 "IRQ status 0x%x -> 0x%x, VOU status 0x%x, cnt %d\n",
1080 irq_status, masked, vou_status, cnt);
1081
1082 cnt++;
1083 side = vou_status & 0x10000;
1084
1085 /* Clear only set interrupts */
1086 sh_vou_reg_a_write(vou_dev, VOUIR, masked);
1087
1088 vb = vou_dev->active;
1089 list_del(&vb->queue);
1090
1091 vb->state = VIDEOBUF_DONE;
1092 v4l2_get_timestamp(&vb->ts);
1093 vb->field_count++;
1094 wake_up(&vb->done);
1095
1096 if (list_empty(&vou_dev->queue)) {
1097 /* Stop VOU */
1098 dev_dbg(vou_dev->v4l2_dev.dev, "%s: queue empty after %d\n",
1099 __func__, cnt);
1100 sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
1101 vou_dev->active = NULL;
1102 vou_dev->status = SH_VOU_INITIALISING;
1103 /* Disable End-of-Frame (VSYNC) interrupts */
1104 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
1105 spin_unlock(&vou_dev->lock);
1106 return IRQ_HANDLED;
1107 }
1108
1109 vou_dev->active = list_entry(vou_dev->queue.next,
1110 struct videobuf_buffer, queue);
1111
1112 if (vou_dev->active->queue.next != &vou_dev->queue) {
1113 struct videobuf_buffer *new = list_entry(vou_dev->active->queue.next,
1114 struct videobuf_buffer, queue);
1115 sh_vou_schedule_next(vou_dev, new);
1116 }
1117
1118 spin_unlock(&vou_dev->lock);
1119
1120 return IRQ_HANDLED;
1121 }
1122
sh_vou_hw_init(struct sh_vou_device * vou_dev)1123 static int sh_vou_hw_init(struct sh_vou_device *vou_dev)
1124 {
1125 struct sh_vou_pdata *pdata = vou_dev->pdata;
1126 u32 voucr = sh_vou_ntsc_mode(pdata->bus_fmt) << 29;
1127 int i = 100;
1128
1129 /* Disable all IRQs */
1130 sh_vou_reg_a_write(vou_dev, VOUIR, 0);
1131
1132 /* Reset VOU interfaces - registers unaffected */
1133 sh_vou_reg_a_write(vou_dev, VOUSRR, 0x101);
1134 while (--i && (sh_vou_reg_a_read(vou_dev, VOUSRR) & 0x101))
1135 udelay(1);
1136
1137 if (!i)
1138 return -ETIMEDOUT;
1139
1140 dev_dbg(vou_dev->v4l2_dev.dev, "Reset took %dus\n", 100 - i);
1141
1142 if (pdata->flags & SH_VOU_PCLK_FALLING)
1143 voucr |= 1 << 28;
1144 if (pdata->flags & SH_VOU_HSYNC_LOW)
1145 voucr |= 1 << 27;
1146 if (pdata->flags & SH_VOU_VSYNC_LOW)
1147 voucr |= 1 << 26;
1148 sh_vou_reg_ab_set(vou_dev, VOUCR, voucr, 0xfc000000);
1149
1150 /* Manual register side switching at first */
1151 sh_vou_reg_a_write(vou_dev, VOURCR, 4);
1152 /* Default - fixed HSYNC length, can be made configurable is required */
1153 sh_vou_reg_ab_write(vou_dev, VOUMSR, 0x800000);
1154
1155 return 0;
1156 }
1157
1158 /* File operations */
sh_vou_open(struct file * file)1159 static int sh_vou_open(struct file *file)
1160 {
1161 struct sh_vou_device *vou_dev = video_drvdata(file);
1162 struct sh_vou_file *vou_file = kzalloc(sizeof(struct sh_vou_file),
1163 GFP_KERNEL);
1164
1165 if (!vou_file)
1166 return -ENOMEM;
1167
1168 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
1169
1170 file->private_data = vou_file;
1171
1172 if (mutex_lock_interruptible(&vou_dev->fop_lock))
1173 return -ERESTARTSYS;
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(vou_dev->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(vou_dev->v4l2_dev.dev);
1183 vou_dev->status = SH_VOU_IDLE;
1184 mutex_unlock(&vou_dev->fop_lock);
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),
1194 vou_dev->vdev, &vou_dev->fop_lock);
1195 mutex_unlock(&vou_dev->fop_lock);
1196
1197 return 0;
1198 }
1199
sh_vou_release(struct file * file)1200 static int sh_vou_release(struct file *file)
1201 {
1202 struct sh_vou_device *vou_dev = video_drvdata(file);
1203 struct sh_vou_file *vou_file = file->private_data;
1204
1205 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
1206
1207 if (!atomic_dec_return(&vou_dev->use_count)) {
1208 mutex_lock(&vou_dev->fop_lock);
1209 /* Last close */
1210 vou_dev->status = SH_VOU_IDLE;
1211 sh_vou_reg_a_set(vou_dev, VOUER, 0, 0x101);
1212 pm_runtime_put(vou_dev->v4l2_dev.dev);
1213 mutex_unlock(&vou_dev->fop_lock);
1214 }
1215
1216 file->private_data = NULL;
1217 kfree(vou_file);
1218
1219 return 0;
1220 }
1221
sh_vou_mmap(struct file * file,struct vm_area_struct * vma)1222 static int sh_vou_mmap(struct file *file, struct vm_area_struct *vma)
1223 {
1224 struct sh_vou_device *vou_dev = video_drvdata(file);
1225 struct sh_vou_file *vou_file = file->private_data;
1226 int ret;
1227
1228 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
1229
1230 if (mutex_lock_interruptible(&vou_dev->fop_lock))
1231 return -ERESTARTSYS;
1232 ret = videobuf_mmap_mapper(&vou_file->vbq, vma);
1233 mutex_unlock(&vou_dev->fop_lock);
1234 return ret;
1235 }
1236
sh_vou_poll(struct file * file,poll_table * wait)1237 static unsigned int sh_vou_poll(struct file *file, poll_table *wait)
1238 {
1239 struct sh_vou_device *vou_dev = video_drvdata(file);
1240 struct sh_vou_file *vou_file = file->private_data;
1241 unsigned int res;
1242
1243 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
1244
1245 mutex_lock(&vou_dev->fop_lock);
1246 res = videobuf_poll_stream(file, &vou_file->vbq, wait);
1247 mutex_unlock(&vou_dev->fop_lock);
1248 return res;
1249 }
1250
sh_vou_g_chip_ident(struct file * file,void * fh,struct v4l2_dbg_chip_ident * id)1251 static int sh_vou_g_chip_ident(struct file *file, void *fh,
1252 struct v4l2_dbg_chip_ident *id)
1253 {
1254 struct sh_vou_device *vou_dev = video_drvdata(file);
1255
1256 return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, g_chip_ident, id);
1257 }
1258
1259 #ifdef CONFIG_VIDEO_ADV_DEBUG
sh_vou_g_register(struct file * file,void * fh,struct v4l2_dbg_register * reg)1260 static int sh_vou_g_register(struct file *file, void *fh,
1261 struct v4l2_dbg_register *reg)
1262 {
1263 struct sh_vou_device *vou_dev = video_drvdata(file);
1264
1265 return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, g_register, reg);
1266 }
1267
sh_vou_s_register(struct file * file,void * fh,const struct v4l2_dbg_register * reg)1268 static int sh_vou_s_register(struct file *file, void *fh,
1269 const struct v4l2_dbg_register *reg)
1270 {
1271 struct sh_vou_device *vou_dev = video_drvdata(file);
1272
1273 return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, s_register, reg);
1274 }
1275 #endif
1276
1277 /* sh_vou display ioctl operations */
1278 static const struct v4l2_ioctl_ops sh_vou_ioctl_ops = {
1279 .vidioc_querycap = sh_vou_querycap,
1280 .vidioc_enum_fmt_vid_out = sh_vou_enum_fmt_vid_out,
1281 .vidioc_g_fmt_vid_out = sh_vou_g_fmt_vid_out,
1282 .vidioc_s_fmt_vid_out = sh_vou_s_fmt_vid_out,
1283 .vidioc_try_fmt_vid_out = sh_vou_try_fmt_vid_out,
1284 .vidioc_reqbufs = sh_vou_reqbufs,
1285 .vidioc_querybuf = sh_vou_querybuf,
1286 .vidioc_qbuf = sh_vou_qbuf,
1287 .vidioc_dqbuf = sh_vou_dqbuf,
1288 .vidioc_streamon = sh_vou_streamon,
1289 .vidioc_streamoff = sh_vou_streamoff,
1290 .vidioc_s_std = sh_vou_s_std,
1291 .vidioc_g_std = sh_vou_g_std,
1292 .vidioc_cropcap = sh_vou_cropcap,
1293 .vidioc_g_crop = sh_vou_g_crop,
1294 .vidioc_s_crop = sh_vou_s_crop,
1295 .vidioc_g_chip_ident = sh_vou_g_chip_ident,
1296 #ifdef CONFIG_VIDEO_ADV_DEBUG
1297 .vidioc_g_register = sh_vou_g_register,
1298 .vidioc_s_register = sh_vou_s_register,
1299 #endif
1300 };
1301
1302 static const struct v4l2_file_operations sh_vou_fops = {
1303 .owner = THIS_MODULE,
1304 .open = sh_vou_open,
1305 .release = sh_vou_release,
1306 .unlocked_ioctl = video_ioctl2,
1307 .mmap = sh_vou_mmap,
1308 .poll = sh_vou_poll,
1309 };
1310
1311 static const struct video_device sh_vou_video_template = {
1312 .name = "sh_vou",
1313 .fops = &sh_vou_fops,
1314 .ioctl_ops = &sh_vou_ioctl_ops,
1315 .tvnorms = V4L2_STD_525_60, /* PAL only supported in 8-bit non-bt656 mode */
1316 .current_norm = V4L2_STD_NTSC_M,
1317 .vfl_dir = VFL_DIR_TX,
1318 };
1319
sh_vou_probe(struct platform_device * pdev)1320 static int sh_vou_probe(struct platform_device *pdev)
1321 {
1322 struct sh_vou_pdata *vou_pdata = pdev->dev.platform_data;
1323 struct v4l2_rect *rect;
1324 struct v4l2_pix_format *pix;
1325 struct i2c_adapter *i2c_adap;
1326 struct video_device *vdev;
1327 struct sh_vou_device *vou_dev;
1328 struct resource *reg_res, *region;
1329 struct v4l2_subdev *subdev;
1330 int irq, ret;
1331
1332 reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1333 irq = platform_get_irq(pdev, 0);
1334
1335 if (!vou_pdata || !reg_res || irq <= 0) {
1336 dev_err(&pdev->dev, "Insufficient VOU platform information.\n");
1337 return -ENODEV;
1338 }
1339
1340 vou_dev = kzalloc(sizeof(*vou_dev), GFP_KERNEL);
1341 if (!vou_dev)
1342 return -ENOMEM;
1343
1344 INIT_LIST_HEAD(&vou_dev->queue);
1345 spin_lock_init(&vou_dev->lock);
1346 mutex_init(&vou_dev->fop_lock);
1347 atomic_set(&vou_dev->use_count, 0);
1348 vou_dev->pdata = vou_pdata;
1349 vou_dev->status = SH_VOU_IDLE;
1350
1351 rect = &vou_dev->rect;
1352 pix = &vou_dev->pix;
1353
1354 /* Fill in defaults */
1355 vou_dev->std = sh_vou_video_template.current_norm;
1356 rect->left = 0;
1357 rect->top = 0;
1358 rect->width = VOU_MAX_IMAGE_WIDTH;
1359 rect->height = 480;
1360 pix->width = VOU_MAX_IMAGE_WIDTH;
1361 pix->height = 480;
1362 pix->pixelformat = V4L2_PIX_FMT_YVYU;
1363 pix->field = V4L2_FIELD_NONE;
1364 pix->bytesperline = VOU_MAX_IMAGE_WIDTH * 2;
1365 pix->sizeimage = VOU_MAX_IMAGE_WIDTH * 2 * 480;
1366 pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
1367
1368 region = request_mem_region(reg_res->start, resource_size(reg_res),
1369 pdev->name);
1370 if (!region) {
1371 dev_err(&pdev->dev, "VOU region already claimed\n");
1372 ret = -EBUSY;
1373 goto ereqmemreg;
1374 }
1375
1376 vou_dev->base = ioremap(reg_res->start, resource_size(reg_res));
1377 if (!vou_dev->base) {
1378 ret = -ENOMEM;
1379 goto emap;
1380 }
1381
1382 ret = request_irq(irq, sh_vou_isr, 0, "vou", vou_dev);
1383 if (ret < 0)
1384 goto ereqirq;
1385
1386 ret = v4l2_device_register(&pdev->dev, &vou_dev->v4l2_dev);
1387 if (ret < 0) {
1388 dev_err(&pdev->dev, "Error registering v4l2 device\n");
1389 goto ev4l2devreg;
1390 }
1391
1392 /* Allocate memory for video device */
1393 vdev = video_device_alloc();
1394 if (vdev == NULL) {
1395 ret = -ENOMEM;
1396 goto evdevalloc;
1397 }
1398
1399 *vdev = sh_vou_video_template;
1400 if (vou_pdata->bus_fmt == SH_VOU_BUS_8BIT)
1401 vdev->tvnorms |= V4L2_STD_PAL;
1402 vdev->v4l2_dev = &vou_dev->v4l2_dev;
1403 vdev->release = video_device_release;
1404 vdev->lock = &vou_dev->fop_lock;
1405
1406 vou_dev->vdev = vdev;
1407 video_set_drvdata(vdev, vou_dev);
1408
1409 pm_runtime_enable(&pdev->dev);
1410 pm_runtime_resume(&pdev->dev);
1411
1412 i2c_adap = i2c_get_adapter(vou_pdata->i2c_adap);
1413 if (!i2c_adap) {
1414 ret = -ENODEV;
1415 goto ei2cgadap;
1416 }
1417
1418 ret = sh_vou_hw_init(vou_dev);
1419 if (ret < 0)
1420 goto ereset;
1421
1422 subdev = v4l2_i2c_new_subdev_board(&vou_dev->v4l2_dev, i2c_adap,
1423 vou_pdata->board_info, NULL);
1424 if (!subdev) {
1425 ret = -ENOMEM;
1426 goto ei2cnd;
1427 }
1428
1429 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1430 if (ret < 0)
1431 goto evregdev;
1432
1433 return 0;
1434
1435 evregdev:
1436 ei2cnd:
1437 ereset:
1438 i2c_put_adapter(i2c_adap);
1439 ei2cgadap:
1440 video_device_release(vdev);
1441 pm_runtime_disable(&pdev->dev);
1442 evdevalloc:
1443 v4l2_device_unregister(&vou_dev->v4l2_dev);
1444 ev4l2devreg:
1445 free_irq(irq, vou_dev);
1446 ereqirq:
1447 iounmap(vou_dev->base);
1448 emap:
1449 release_mem_region(reg_res->start, resource_size(reg_res));
1450 ereqmemreg:
1451 kfree(vou_dev);
1452 return ret;
1453 }
1454
sh_vou_remove(struct platform_device * pdev)1455 static int sh_vou_remove(struct platform_device *pdev)
1456 {
1457 int irq = platform_get_irq(pdev, 0);
1458 struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1459 struct sh_vou_device *vou_dev = container_of(v4l2_dev,
1460 struct sh_vou_device, v4l2_dev);
1461 struct v4l2_subdev *sd = list_entry(v4l2_dev->subdevs.next,
1462 struct v4l2_subdev, list);
1463 struct i2c_client *client = v4l2_get_subdevdata(sd);
1464 struct resource *reg_res;
1465
1466 if (irq > 0)
1467 free_irq(irq, vou_dev);
1468 pm_runtime_disable(&pdev->dev);
1469 video_unregister_device(vou_dev->vdev);
1470 i2c_put_adapter(client->adapter);
1471 v4l2_device_unregister(&vou_dev->v4l2_dev);
1472 iounmap(vou_dev->base);
1473 reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1474 if (reg_res)
1475 release_mem_region(reg_res->start, resource_size(reg_res));
1476 kfree(vou_dev);
1477 return 0;
1478 }
1479
1480 static struct platform_driver __refdata sh_vou = {
1481 .remove = sh_vou_remove,
1482 .driver = {
1483 .name = "sh-vou",
1484 .owner = THIS_MODULE,
1485 },
1486 };
1487
1488 module_platform_driver_probe(sh_vou, sh_vou_probe);
1489
1490 MODULE_DESCRIPTION("SuperH VOU driver");
1491 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1492 MODULE_LICENSE("GPL v2");
1493 MODULE_VERSION("0.1.0");
1494 MODULE_ALIAS("platform:sh-vou");
1495