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/videobuf2-v4l2.h>
31 #include <media/videobuf2-dma-contig.h>
32
33 /* Mirror addresses are not available for all registers */
34 #define VOUER 0
35 #define VOUCR 4
36 #define VOUSTR 8
37 #define VOUVCR 0xc
38 #define VOUISR 0x10
39 #define VOUBCR 0x14
40 #define VOUDPR 0x18
41 #define VOUDSR 0x1c
42 #define VOUVPR 0x20
43 #define VOUIR 0x24
44 #define VOUSRR 0x28
45 #define VOUMSR 0x2c
46 #define VOUHIR 0x30
47 #define VOUDFR 0x34
48 #define VOUAD1R 0x38
49 #define VOUAD2R 0x3c
50 #define VOUAIR 0x40
51 #define VOUSWR 0x44
52 #define VOURCR 0x48
53 #define VOURPR 0x50
54
55 enum sh_vou_status {
56 SH_VOU_IDLE,
57 SH_VOU_INITIALISING,
58 SH_VOU_RUNNING,
59 };
60
61 #define VOU_MIN_IMAGE_WIDTH 16
62 #define VOU_MAX_IMAGE_WIDTH 720
63 #define VOU_MIN_IMAGE_HEIGHT 16
64
65 struct sh_vou_buffer {
66 struct vb2_v4l2_buffer vb;
67 struct list_head list;
68 };
69
70 static inline struct
to_sh_vou_buffer(struct vb2_v4l2_buffer * vb2)71 sh_vou_buffer *to_sh_vou_buffer(struct vb2_v4l2_buffer *vb2)
72 {
73 return container_of(vb2, struct sh_vou_buffer, vb);
74 }
75
76 struct sh_vou_device {
77 struct v4l2_device v4l2_dev;
78 struct video_device vdev;
79 struct sh_vou_pdata *pdata;
80 spinlock_t lock;
81 void __iomem *base;
82 /* State information */
83 struct v4l2_pix_format pix;
84 struct v4l2_rect rect;
85 struct list_head buf_list;
86 v4l2_std_id std;
87 int pix_idx;
88 struct vb2_queue queue;
89 struct vb2_alloc_ctx *alloc_ctx;
90 struct sh_vou_buffer *active;
91 enum sh_vou_status status;
92 unsigned sequence;
93 struct mutex fop_lock;
94 };
95
96 /* 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)97 static void sh_vou_reg_a_write(struct sh_vou_device *vou_dev, unsigned int reg,
98 u32 value)
99 {
100 __raw_writel(value, vou_dev->base + reg);
101 }
102
sh_vou_reg_ab_write(struct sh_vou_device * vou_dev,unsigned int reg,u32 value)103 static void sh_vou_reg_ab_write(struct sh_vou_device *vou_dev, unsigned int reg,
104 u32 value)
105 {
106 __raw_writel(value, vou_dev->base + reg);
107 __raw_writel(value, vou_dev->base + reg + 0x1000);
108 }
109
sh_vou_reg_m_write(struct sh_vou_device * vou_dev,unsigned int reg,u32 value)110 static void sh_vou_reg_m_write(struct sh_vou_device *vou_dev, unsigned int reg,
111 u32 value)
112 {
113 __raw_writel(value, vou_dev->base + reg + 0x2000);
114 }
115
sh_vou_reg_a_read(struct sh_vou_device * vou_dev,unsigned int reg)116 static u32 sh_vou_reg_a_read(struct sh_vou_device *vou_dev, unsigned int reg)
117 {
118 return __raw_readl(vou_dev->base + reg);
119 }
120
sh_vou_reg_a_set(struct sh_vou_device * vou_dev,unsigned int reg,u32 value,u32 mask)121 static void sh_vou_reg_a_set(struct sh_vou_device *vou_dev, unsigned int reg,
122 u32 value, u32 mask)
123 {
124 u32 old = __raw_readl(vou_dev->base + reg);
125
126 value = (value & mask) | (old & ~mask);
127 __raw_writel(value, vou_dev->base + reg);
128 }
129
sh_vou_reg_b_set(struct sh_vou_device * vou_dev,unsigned int reg,u32 value,u32 mask)130 static void sh_vou_reg_b_set(struct sh_vou_device *vou_dev, unsigned int reg,
131 u32 value, u32 mask)
132 {
133 sh_vou_reg_a_set(vou_dev, reg + 0x1000, value, mask);
134 }
135
sh_vou_reg_ab_set(struct sh_vou_device * vou_dev,unsigned int reg,u32 value,u32 mask)136 static void sh_vou_reg_ab_set(struct sh_vou_device *vou_dev, unsigned int reg,
137 u32 value, u32 mask)
138 {
139 sh_vou_reg_a_set(vou_dev, reg, value, mask);
140 sh_vou_reg_b_set(vou_dev, reg, value, mask);
141 }
142
143 struct sh_vou_fmt {
144 u32 pfmt;
145 char *desc;
146 unsigned char bpp;
147 unsigned char bpl;
148 unsigned char rgb;
149 unsigned char yf;
150 unsigned char pkf;
151 };
152
153 /* Further pixel formats can be added */
154 static struct sh_vou_fmt vou_fmt[] = {
155 {
156 .pfmt = V4L2_PIX_FMT_NV12,
157 .bpp = 12,
158 .bpl = 1,
159 .desc = "YVU420 planar",
160 .yf = 0,
161 .rgb = 0,
162 },
163 {
164 .pfmt = V4L2_PIX_FMT_NV16,
165 .bpp = 16,
166 .bpl = 1,
167 .desc = "YVYU planar",
168 .yf = 1,
169 .rgb = 0,
170 },
171 {
172 .pfmt = V4L2_PIX_FMT_RGB24,
173 .bpp = 24,
174 .bpl = 3,
175 .desc = "RGB24",
176 .pkf = 2,
177 .rgb = 1,
178 },
179 {
180 .pfmt = V4L2_PIX_FMT_RGB565,
181 .bpp = 16,
182 .bpl = 2,
183 .desc = "RGB565",
184 .pkf = 3,
185 .rgb = 1,
186 },
187 {
188 .pfmt = V4L2_PIX_FMT_RGB565X,
189 .bpp = 16,
190 .bpl = 2,
191 .desc = "RGB565 byteswapped",
192 .pkf = 3,
193 .rgb = 1,
194 },
195 };
196
sh_vou_schedule_next(struct sh_vou_device * vou_dev,struct vb2_v4l2_buffer * vbuf)197 static void sh_vou_schedule_next(struct sh_vou_device *vou_dev,
198 struct vb2_v4l2_buffer *vbuf)
199 {
200 dma_addr_t addr1, addr2;
201
202 addr1 = vb2_dma_contig_plane_dma_addr(&vbuf->vb2_buf, 0);
203 switch (vou_dev->pix.pixelformat) {
204 case V4L2_PIX_FMT_NV12:
205 case V4L2_PIX_FMT_NV16:
206 addr2 = addr1 + vou_dev->pix.width * vou_dev->pix.height;
207 break;
208 default:
209 addr2 = 0;
210 }
211
212 sh_vou_reg_m_write(vou_dev, VOUAD1R, addr1);
213 sh_vou_reg_m_write(vou_dev, VOUAD2R, addr2);
214 }
215
sh_vou_stream_config(struct sh_vou_device * vou_dev)216 static void sh_vou_stream_config(struct sh_vou_device *vou_dev)
217 {
218 unsigned int row_coeff;
219 #ifdef __LITTLE_ENDIAN
220 u32 dataswap = 7;
221 #else
222 u32 dataswap = 0;
223 #endif
224
225 switch (vou_dev->pix.pixelformat) {
226 default:
227 case V4L2_PIX_FMT_NV12:
228 case V4L2_PIX_FMT_NV16:
229 row_coeff = 1;
230 break;
231 case V4L2_PIX_FMT_RGB565:
232 dataswap ^= 1;
233 case V4L2_PIX_FMT_RGB565X:
234 row_coeff = 2;
235 break;
236 case V4L2_PIX_FMT_RGB24:
237 row_coeff = 3;
238 break;
239 }
240
241 sh_vou_reg_a_write(vou_dev, VOUSWR, dataswap);
242 sh_vou_reg_ab_write(vou_dev, VOUAIR, vou_dev->pix.width * row_coeff);
243 }
244
245 /* Locking: caller holds fop_lock mutex */
sh_vou_queue_setup(struct vb2_queue * vq,const void * parg,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],void * alloc_ctxs[])246 static int sh_vou_queue_setup(struct vb2_queue *vq, const void *parg,
247 unsigned int *nbuffers, unsigned int *nplanes,
248 unsigned int sizes[], void *alloc_ctxs[])
249 {
250 const struct v4l2_format *fmt = parg;
251 struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
252 struct v4l2_pix_format *pix = &vou_dev->pix;
253 int bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
254
255 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
256
257 if (fmt && fmt->fmt.pix.sizeimage < pix->height * bytes_per_line)
258 return -EINVAL;
259 *nplanes = 1;
260 sizes[0] = fmt ? fmt->fmt.pix.sizeimage : pix->height * bytes_per_line;
261 alloc_ctxs[0] = vou_dev->alloc_ctx;
262 return 0;
263 }
264
sh_vou_buf_prepare(struct vb2_buffer * vb)265 static int sh_vou_buf_prepare(struct vb2_buffer *vb)
266 {
267 struct sh_vou_device *vou_dev = vb2_get_drv_priv(vb->vb2_queue);
268 struct v4l2_pix_format *pix = &vou_dev->pix;
269 unsigned bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
270 unsigned size = pix->height * bytes_per_line;
271
272 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
273
274 if (vb2_plane_size(vb, 0) < size) {
275 /* User buffer too small */
276 dev_warn(vou_dev->v4l2_dev.dev, "buffer too small (%lu < %u)\n",
277 vb2_plane_size(vb, 0), size);
278 return -EINVAL;
279 }
280
281 vb2_set_plane_payload(vb, 0, size);
282 return 0;
283 }
284
285 /* Locking: caller holds fop_lock mutex and vq->irqlock spinlock */
sh_vou_buf_queue(struct vb2_buffer * vb)286 static void sh_vou_buf_queue(struct vb2_buffer *vb)
287 {
288 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
289 struct sh_vou_device *vou_dev = vb2_get_drv_priv(vb->vb2_queue);
290 struct sh_vou_buffer *shbuf = to_sh_vou_buffer(vbuf);
291 unsigned long flags;
292
293 spin_lock_irqsave(&vou_dev->lock, flags);
294 list_add_tail(&shbuf->list, &vou_dev->buf_list);
295 spin_unlock_irqrestore(&vou_dev->lock, flags);
296 }
297
sh_vou_start_streaming(struct vb2_queue * vq,unsigned int count)298 static int sh_vou_start_streaming(struct vb2_queue *vq, unsigned int count)
299 {
300 struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
301 struct sh_vou_buffer *buf, *node;
302 int ret;
303
304 vou_dev->sequence = 0;
305 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
306 video, s_stream, 1);
307 if (ret < 0 && ret != -ENOIOCTLCMD) {
308 list_for_each_entry_safe(buf, node, &vou_dev->buf_list, list) {
309 vb2_buffer_done(&buf->vb.vb2_buf,
310 VB2_BUF_STATE_QUEUED);
311 list_del(&buf->list);
312 }
313 vou_dev->active = NULL;
314 return ret;
315 }
316
317 buf = list_entry(vou_dev->buf_list.next, struct sh_vou_buffer, list);
318
319 vou_dev->active = buf;
320
321 /* Start from side A: we use mirror addresses, so, set B */
322 sh_vou_reg_a_write(vou_dev, VOURPR, 1);
323 dev_dbg(vou_dev->v4l2_dev.dev, "%s: first buffer status 0x%x\n",
324 __func__, sh_vou_reg_a_read(vou_dev, VOUSTR));
325 sh_vou_schedule_next(vou_dev, &buf->vb);
326
327 buf = list_entry(buf->list.next, struct sh_vou_buffer, list);
328
329 /* Second buffer - initialise register side B */
330 sh_vou_reg_a_write(vou_dev, VOURPR, 0);
331 sh_vou_schedule_next(vou_dev, &buf->vb);
332
333 /* Register side switching with frame VSYNC */
334 sh_vou_reg_a_write(vou_dev, VOURCR, 5);
335
336 sh_vou_stream_config(vou_dev);
337 /* Enable End-of-Frame (VSYNC) interrupts */
338 sh_vou_reg_a_write(vou_dev, VOUIR, 0x10004);
339
340 /* Two buffers on the queue - activate the hardware */
341 vou_dev->status = SH_VOU_RUNNING;
342 sh_vou_reg_a_write(vou_dev, VOUER, 0x107);
343 return 0;
344 }
345
sh_vou_stop_streaming(struct vb2_queue * vq)346 static void sh_vou_stop_streaming(struct vb2_queue *vq)
347 {
348 struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
349 struct sh_vou_buffer *buf, *node;
350 unsigned long flags;
351
352 v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
353 video, s_stream, 0);
354 /* disable output */
355 sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
356 /* ...but the current frame will complete */
357 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
358 msleep(50);
359 spin_lock_irqsave(&vou_dev->lock, flags);
360 list_for_each_entry_safe(buf, node, &vou_dev->buf_list, list) {
361 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
362 list_del(&buf->list);
363 }
364 vou_dev->active = NULL;
365 spin_unlock_irqrestore(&vou_dev->lock, flags);
366 }
367
368 static struct vb2_ops sh_vou_qops = {
369 .queue_setup = sh_vou_queue_setup,
370 .buf_prepare = sh_vou_buf_prepare,
371 .buf_queue = sh_vou_buf_queue,
372 .start_streaming = sh_vou_start_streaming,
373 .stop_streaming = sh_vou_stop_streaming,
374 .wait_prepare = vb2_ops_wait_prepare,
375 .wait_finish = vb2_ops_wait_finish,
376 };
377
378 /* Video IOCTLs */
sh_vou_querycap(struct file * file,void * priv,struct v4l2_capability * cap)379 static int sh_vou_querycap(struct file *file, void *priv,
380 struct v4l2_capability *cap)
381 {
382 struct sh_vou_device *vou_dev = video_drvdata(file);
383
384 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
385
386 strlcpy(cap->card, "SuperH VOU", sizeof(cap->card));
387 strlcpy(cap->driver, "sh-vou", sizeof(cap->driver));
388 strlcpy(cap->bus_info, "platform:sh-vou", sizeof(cap->bus_info));
389 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_READWRITE |
390 V4L2_CAP_STREAMING;
391 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
392 return 0;
393 }
394
395 /* 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)396 static int sh_vou_enum_fmt_vid_out(struct file *file, void *priv,
397 struct v4l2_fmtdesc *fmt)
398 {
399 struct sh_vou_device *vou_dev = video_drvdata(file);
400
401 if (fmt->index >= ARRAY_SIZE(vou_fmt))
402 return -EINVAL;
403
404 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
405
406 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
407 strlcpy(fmt->description, vou_fmt[fmt->index].desc,
408 sizeof(fmt->description));
409 fmt->pixelformat = vou_fmt[fmt->index].pfmt;
410
411 return 0;
412 }
413
sh_vou_g_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * fmt)414 static int sh_vou_g_fmt_vid_out(struct file *file, void *priv,
415 struct v4l2_format *fmt)
416 {
417 struct sh_vou_device *vou_dev = video_drvdata(file);
418
419 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
420
421 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
422 fmt->fmt.pix = vou_dev->pix;
423
424 return 0;
425 }
426
427 static const unsigned char vou_scale_h_num[] = {1, 9, 2, 9, 4};
428 static const unsigned char vou_scale_h_den[] = {1, 8, 1, 4, 1};
429 static const unsigned char vou_scale_h_fld[] = {0, 2, 1, 3};
430 static const unsigned char vou_scale_v_num[] = {1, 2, 4};
431 static const unsigned char vou_scale_v_den[] = {1, 1, 1};
432 static const unsigned char vou_scale_v_fld[] = {0, 1};
433
sh_vou_configure_geometry(struct sh_vou_device * vou_dev,int pix_idx,int w_idx,int h_idx)434 static void sh_vou_configure_geometry(struct sh_vou_device *vou_dev,
435 int pix_idx, int w_idx, int h_idx)
436 {
437 struct sh_vou_fmt *fmt = vou_fmt + pix_idx;
438 unsigned int black_left, black_top, width_max,
439 frame_in_height, frame_out_height, frame_out_top;
440 struct v4l2_rect *rect = &vou_dev->rect;
441 struct v4l2_pix_format *pix = &vou_dev->pix;
442 u32 vouvcr = 0, dsr_h, dsr_v;
443
444 if (vou_dev->std & V4L2_STD_525_60) {
445 width_max = 858;
446 /* height_max = 262; */
447 } else {
448 width_max = 864;
449 /* height_max = 312; */
450 }
451
452 frame_in_height = pix->height / 2;
453 frame_out_height = rect->height / 2;
454 frame_out_top = rect->top / 2;
455
456 /*
457 * Cropping scheme: max useful image is 720x480, and the total video
458 * area is 858x525 (NTSC) or 864x625 (PAL). AK8813 / 8814 starts
459 * sampling data beginning with fixed 276th (NTSC) / 288th (PAL) clock,
460 * of which the first 33 / 25 clocks HSYNC must be held active. This
461 * has to be configured in CR[HW]. 1 pixel equals 2 clock periods.
462 * This gives CR[HW] = 16 / 12, VPR[HVP] = 138 / 144, which gives
463 * exactly 858 - 138 = 864 - 144 = 720! We call the out-of-display area,
464 * beyond DSR, specified on the left and top by the VPR register "black
465 * pixels" and out-of-image area (DPR) "background pixels." We fix VPR
466 * at 138 / 144 : 20, because that's the HSYNC timing, that our first
467 * client requires, and that's exactly what leaves us 720 pixels for the
468 * image; we leave VPR[VVP] at default 20 for now, because the client
469 * doesn't seem to have any special requirements for it. Otherwise we
470 * could also set it to max - 240 = 22 / 72. Thus VPR depends only on
471 * the selected standard, and DPR and DSR are selected according to
472 * cropping. Q: how does the client detect the first valid line? Does
473 * HSYNC stay inactive during invalid (black) lines?
474 */
475 black_left = width_max - VOU_MAX_IMAGE_WIDTH;
476 black_top = 20;
477
478 dsr_h = rect->width + rect->left;
479 dsr_v = frame_out_height + frame_out_top;
480
481 dev_dbg(vou_dev->v4l2_dev.dev,
482 "image %ux%u, black %u:%u, offset %u:%u, display %ux%u\n",
483 pix->width, frame_in_height, black_left, black_top,
484 rect->left, frame_out_top, dsr_h, dsr_v);
485
486 /* VOUISR height - half of a frame height in frame mode */
487 sh_vou_reg_ab_write(vou_dev, VOUISR, (pix->width << 16) | frame_in_height);
488 sh_vou_reg_ab_write(vou_dev, VOUVPR, (black_left << 16) | black_top);
489 sh_vou_reg_ab_write(vou_dev, VOUDPR, (rect->left << 16) | frame_out_top);
490 sh_vou_reg_ab_write(vou_dev, VOUDSR, (dsr_h << 16) | dsr_v);
491
492 /*
493 * if necessary, we could set VOUHIR to
494 * max(black_left + dsr_h, width_max) here
495 */
496
497 if (w_idx)
498 vouvcr |= (1 << 15) | (vou_scale_h_fld[w_idx - 1] << 4);
499 if (h_idx)
500 vouvcr |= (1 << 14) | vou_scale_v_fld[h_idx - 1];
501
502 dev_dbg(vou_dev->v4l2_dev.dev, "%s: scaling 0x%x\n", fmt->desc, vouvcr);
503
504 /* To produce a colour bar for testing set bit 23 of VOUVCR */
505 sh_vou_reg_ab_write(vou_dev, VOUVCR, vouvcr);
506 sh_vou_reg_ab_write(vou_dev, VOUDFR,
507 fmt->pkf | (fmt->yf << 8) | (fmt->rgb << 16));
508 }
509
510 struct sh_vou_geometry {
511 struct v4l2_rect output;
512 unsigned int in_width;
513 unsigned int in_height;
514 int scale_idx_h;
515 int scale_idx_v;
516 };
517
518 /*
519 * Find input geometry, that we can use to produce output, closest to the
520 * requested rectangle, using VOU scaling
521 */
vou_adjust_input(struct sh_vou_geometry * geo,v4l2_std_id std)522 static void vou_adjust_input(struct sh_vou_geometry *geo, v4l2_std_id std)
523 {
524 /* The compiler cannot know, that best and idx will indeed be set */
525 unsigned int best_err = UINT_MAX, best = 0, img_height_max;
526 int i, idx = 0;
527
528 if (std & V4L2_STD_525_60)
529 img_height_max = 480;
530 else
531 img_height_max = 576;
532
533 /* Image width must be a multiple of 4 */
534 v4l_bound_align_image(&geo->in_width,
535 VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 2,
536 &geo->in_height,
537 VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
538
539 /* Select scales to come as close as possible to the output image */
540 for (i = ARRAY_SIZE(vou_scale_h_num) - 1; i >= 0; i--) {
541 unsigned int err;
542 unsigned int found = geo->output.width * vou_scale_h_den[i] /
543 vou_scale_h_num[i];
544
545 if (found > VOU_MAX_IMAGE_WIDTH)
546 /* scales increase */
547 break;
548
549 err = abs(found - geo->in_width);
550 if (err < best_err) {
551 best_err = err;
552 idx = i;
553 best = found;
554 }
555 if (!err)
556 break;
557 }
558
559 geo->in_width = best;
560 geo->scale_idx_h = idx;
561
562 best_err = UINT_MAX;
563
564 /* This loop can be replaced with one division */
565 for (i = ARRAY_SIZE(vou_scale_v_num) - 1; i >= 0; i--) {
566 unsigned int err;
567 unsigned int found = geo->output.height * vou_scale_v_den[i] /
568 vou_scale_v_num[i];
569
570 if (found > img_height_max)
571 /* scales increase */
572 break;
573
574 err = abs(found - geo->in_height);
575 if (err < best_err) {
576 best_err = err;
577 idx = i;
578 best = found;
579 }
580 if (!err)
581 break;
582 }
583
584 geo->in_height = best;
585 geo->scale_idx_v = idx;
586 }
587
588 /*
589 * Find output geometry, that we can produce, using VOU scaling, closest to
590 * the requested rectangle
591 */
vou_adjust_output(struct sh_vou_geometry * geo,v4l2_std_id std)592 static void vou_adjust_output(struct sh_vou_geometry *geo, v4l2_std_id std)
593 {
594 unsigned int best_err = UINT_MAX, best = geo->in_width,
595 width_max, height_max, img_height_max;
596 int i, idx_h = 0, idx_v = 0;
597
598 if (std & V4L2_STD_525_60) {
599 width_max = 858;
600 height_max = 262 * 2;
601 img_height_max = 480;
602 } else {
603 width_max = 864;
604 height_max = 312 * 2;
605 img_height_max = 576;
606 }
607
608 /* Select scales to come as close as possible to the output image */
609 for (i = 0; i < ARRAY_SIZE(vou_scale_h_num); i++) {
610 unsigned int err;
611 unsigned int found = geo->in_width * vou_scale_h_num[i] /
612 vou_scale_h_den[i];
613
614 if (found > VOU_MAX_IMAGE_WIDTH)
615 /* scales increase */
616 break;
617
618 err = abs(found - geo->output.width);
619 if (err < best_err) {
620 best_err = err;
621 idx_h = i;
622 best = found;
623 }
624 if (!err)
625 break;
626 }
627
628 geo->output.width = best;
629 geo->scale_idx_h = idx_h;
630 if (geo->output.left + best > width_max)
631 geo->output.left = width_max - best;
632
633 pr_debug("%s(): W %u * %u/%u = %u\n", __func__, geo->in_width,
634 vou_scale_h_num[idx_h], vou_scale_h_den[idx_h], best);
635
636 best_err = UINT_MAX;
637
638 /* This loop can be replaced with one division */
639 for (i = 0; i < ARRAY_SIZE(vou_scale_v_num); i++) {
640 unsigned int err;
641 unsigned int found = geo->in_height * vou_scale_v_num[i] /
642 vou_scale_v_den[i];
643
644 if (found > img_height_max)
645 /* scales increase */
646 break;
647
648 err = abs(found - geo->output.height);
649 if (err < best_err) {
650 best_err = err;
651 idx_v = i;
652 best = found;
653 }
654 if (!err)
655 break;
656 }
657
658 geo->output.height = best;
659 geo->scale_idx_v = idx_v;
660 if (geo->output.top + best > height_max)
661 geo->output.top = height_max - best;
662
663 pr_debug("%s(): H %u * %u/%u = %u\n", __func__, geo->in_height,
664 vou_scale_v_num[idx_v], vou_scale_v_den[idx_v], best);
665 }
666
sh_vou_try_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * fmt)667 static int sh_vou_try_fmt_vid_out(struct file *file, void *priv,
668 struct v4l2_format *fmt)
669 {
670 struct sh_vou_device *vou_dev = video_drvdata(file);
671 struct v4l2_pix_format *pix = &fmt->fmt.pix;
672 unsigned int img_height_max;
673 int pix_idx;
674
675 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
676
677 pix->field = V4L2_FIELD_INTERLACED;
678 pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
679 pix->ycbcr_enc = pix->quantization = 0;
680
681 for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
682 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
683 break;
684
685 if (pix_idx == ARRAY_SIZE(vou_fmt))
686 return -EINVAL;
687
688 if (vou_dev->std & V4L2_STD_525_60)
689 img_height_max = 480;
690 else
691 img_height_max = 576;
692
693 v4l_bound_align_image(&pix->width,
694 VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 2,
695 &pix->height,
696 VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
697 pix->bytesperline = pix->width * vou_fmt[pix_idx].bpl;
698 pix->sizeimage = pix->height * ((pix->width * vou_fmt[pix_idx].bpp) >> 3);
699
700 return 0;
701 }
702
sh_vou_set_fmt_vid_out(struct sh_vou_device * vou_dev,struct v4l2_pix_format * pix)703 static int sh_vou_set_fmt_vid_out(struct sh_vou_device *vou_dev,
704 struct v4l2_pix_format *pix)
705 {
706 unsigned int img_height_max;
707 struct sh_vou_geometry geo;
708 struct v4l2_subdev_format format = {
709 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
710 /* Revisit: is this the correct code? */
711 .format.code = MEDIA_BUS_FMT_YUYV8_2X8,
712 .format.field = V4L2_FIELD_INTERLACED,
713 .format.colorspace = V4L2_COLORSPACE_SMPTE170M,
714 };
715 struct v4l2_mbus_framefmt *mbfmt = &format.format;
716 int pix_idx;
717 int ret;
718
719 if (vb2_is_busy(&vou_dev->queue))
720 return -EBUSY;
721
722 for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
723 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
724 break;
725
726 geo.in_width = pix->width;
727 geo.in_height = pix->height;
728 geo.output = vou_dev->rect;
729
730 vou_adjust_output(&geo, vou_dev->std);
731
732 mbfmt->width = geo.output.width;
733 mbfmt->height = geo.output.height;
734 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
735 set_fmt, NULL, &format);
736 /* Must be implemented, so, don't check for -ENOIOCTLCMD */
737 if (ret < 0)
738 return ret;
739
740 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
741 geo.output.width, geo.output.height, mbfmt->width, mbfmt->height);
742
743 if (vou_dev->std & V4L2_STD_525_60)
744 img_height_max = 480;
745 else
746 img_height_max = 576;
747
748 /* Sanity checks */
749 if ((unsigned)mbfmt->width > VOU_MAX_IMAGE_WIDTH ||
750 (unsigned)mbfmt->height > img_height_max ||
751 mbfmt->code != MEDIA_BUS_FMT_YUYV8_2X8)
752 return -EIO;
753
754 if (mbfmt->width != geo.output.width ||
755 mbfmt->height != geo.output.height) {
756 geo.output.width = mbfmt->width;
757 geo.output.height = mbfmt->height;
758
759 vou_adjust_input(&geo, vou_dev->std);
760 }
761
762 /* We tried to preserve output rectangle, but it could have changed */
763 vou_dev->rect = geo.output;
764 pix->width = geo.in_width;
765 pix->height = geo.in_height;
766
767 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u\n", __func__,
768 pix->width, pix->height);
769
770 vou_dev->pix_idx = pix_idx;
771
772 vou_dev->pix = *pix;
773
774 sh_vou_configure_geometry(vou_dev, pix_idx,
775 geo.scale_idx_h, geo.scale_idx_v);
776
777 return 0;
778 }
779
sh_vou_s_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * fmt)780 static int sh_vou_s_fmt_vid_out(struct file *file, void *priv,
781 struct v4l2_format *fmt)
782 {
783 struct sh_vou_device *vou_dev = video_drvdata(file);
784 int ret = sh_vou_try_fmt_vid_out(file, priv, fmt);
785
786 if (ret)
787 return ret;
788 return sh_vou_set_fmt_vid_out(vou_dev, &fmt->fmt.pix);
789 }
790
sh_vou_enum_output(struct file * file,void * fh,struct v4l2_output * a)791 static int sh_vou_enum_output(struct file *file, void *fh,
792 struct v4l2_output *a)
793 {
794 struct sh_vou_device *vou_dev = video_drvdata(file);
795
796 if (a->index)
797 return -EINVAL;
798 strlcpy(a->name, "Video Out", sizeof(a->name));
799 a->type = V4L2_OUTPUT_TYPE_ANALOG;
800 a->std = vou_dev->vdev.tvnorms;
801 return 0;
802 }
803
sh_vou_g_output(struct file * file,void * fh,unsigned int * i)804 static int sh_vou_g_output(struct file *file, void *fh, unsigned int *i)
805 {
806 *i = 0;
807 return 0;
808 }
809
sh_vou_s_output(struct file * file,void * fh,unsigned int i)810 static int sh_vou_s_output(struct file *file, void *fh, unsigned int i)
811 {
812 return i ? -EINVAL : 0;
813 }
814
sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)815 static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)
816 {
817 switch (bus_fmt) {
818 default:
819 pr_warning("%s(): Invalid bus-format code %d, using default 8-bit\n",
820 __func__, bus_fmt);
821 case SH_VOU_BUS_8BIT:
822 return 1;
823 case SH_VOU_BUS_16BIT:
824 return 0;
825 case SH_VOU_BUS_BT656:
826 return 3;
827 }
828 }
829
sh_vou_s_std(struct file * file,void * priv,v4l2_std_id std_id)830 static int sh_vou_s_std(struct file *file, void *priv, v4l2_std_id std_id)
831 {
832 struct sh_vou_device *vou_dev = video_drvdata(file);
833 int ret;
834
835 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): 0x%llx\n", __func__, std_id);
836
837 if (std_id == vou_dev->std)
838 return 0;
839
840 if (vb2_is_busy(&vou_dev->queue))
841 return -EBUSY;
842
843 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
844 s_std_output, std_id);
845 /* Shall we continue, if the subdev doesn't support .s_std_output()? */
846 if (ret < 0 && ret != -ENOIOCTLCMD)
847 return ret;
848
849 vou_dev->rect.top = vou_dev->rect.left = 0;
850 vou_dev->rect.width = VOU_MAX_IMAGE_WIDTH;
851 if (std_id & V4L2_STD_525_60) {
852 sh_vou_reg_ab_set(vou_dev, VOUCR,
853 sh_vou_ntsc_mode(vou_dev->pdata->bus_fmt) << 29, 7 << 29);
854 vou_dev->rect.height = 480;
855 } else {
856 sh_vou_reg_ab_set(vou_dev, VOUCR, 5 << 29, 7 << 29);
857 vou_dev->rect.height = 576;
858 }
859
860 vou_dev->pix.width = vou_dev->rect.width;
861 vou_dev->pix.height = vou_dev->rect.height;
862 vou_dev->pix.bytesperline =
863 vou_dev->pix.width * vou_fmt[vou_dev->pix_idx].bpl;
864 vou_dev->pix.sizeimage = vou_dev->pix.height *
865 ((vou_dev->pix.width * vou_fmt[vou_dev->pix_idx].bpp) >> 3);
866 vou_dev->std = std_id;
867 sh_vou_set_fmt_vid_out(vou_dev, &vou_dev->pix);
868
869 return 0;
870 }
871
sh_vou_g_std(struct file * file,void * priv,v4l2_std_id * std)872 static int sh_vou_g_std(struct file *file, void *priv, v4l2_std_id *std)
873 {
874 struct sh_vou_device *vou_dev = video_drvdata(file);
875
876 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
877
878 *std = vou_dev->std;
879
880 return 0;
881 }
882
sh_vou_log_status(struct file * file,void * priv)883 static int sh_vou_log_status(struct file *file, void *priv)
884 {
885 struct sh_vou_device *vou_dev = video_drvdata(file);
886
887 pr_info("VOUER: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUER));
888 pr_info("VOUCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUCR));
889 pr_info("VOUSTR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSTR));
890 pr_info("VOUVCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUVCR));
891 pr_info("VOUISR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUISR));
892 pr_info("VOUBCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUBCR));
893 pr_info("VOUDPR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDPR));
894 pr_info("VOUDSR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDSR));
895 pr_info("VOUVPR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUVPR));
896 pr_info("VOUIR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUIR));
897 pr_info("VOUSRR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSRR));
898 pr_info("VOUMSR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUMSR));
899 pr_info("VOUHIR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUHIR));
900 pr_info("VOUDFR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDFR));
901 pr_info("VOUAD1R: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAD1R));
902 pr_info("VOUAD2R: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAD2R));
903 pr_info("VOUAIR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAIR));
904 pr_info("VOUSWR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSWR));
905 pr_info("VOURCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOURCR));
906 pr_info("VOURPR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOURPR));
907 return 0;
908 }
909
sh_vou_g_selection(struct file * file,void * fh,struct v4l2_selection * sel)910 static int sh_vou_g_selection(struct file *file, void *fh,
911 struct v4l2_selection *sel)
912 {
913 struct sh_vou_device *vou_dev = video_drvdata(file);
914
915 if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
916 return -EINVAL;
917 switch (sel->target) {
918 case V4L2_SEL_TGT_COMPOSE:
919 sel->r = vou_dev->rect;
920 break;
921 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
922 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
923 sel->r.left = 0;
924 sel->r.top = 0;
925 sel->r.width = VOU_MAX_IMAGE_WIDTH;
926 if (vou_dev->std & V4L2_STD_525_60)
927 sel->r.height = 480;
928 else
929 sel->r.height = 576;
930 break;
931 default:
932 return -EINVAL;
933 }
934 return 0;
935 }
936
937 /* Assume a dull encoder, do all the work ourselves. */
sh_vou_s_selection(struct file * file,void * fh,struct v4l2_selection * sel)938 static int sh_vou_s_selection(struct file *file, void *fh,
939 struct v4l2_selection *sel)
940 {
941 struct v4l2_rect *rect = &sel->r;
942 struct sh_vou_device *vou_dev = video_drvdata(file);
943 struct v4l2_crop sd_crop = {.type = V4L2_BUF_TYPE_VIDEO_OUTPUT};
944 struct v4l2_pix_format *pix = &vou_dev->pix;
945 struct sh_vou_geometry geo;
946 struct v4l2_subdev_format format = {
947 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
948 /* Revisit: is this the correct code? */
949 .format.code = MEDIA_BUS_FMT_YUYV8_2X8,
950 .format.field = V4L2_FIELD_INTERLACED,
951 .format.colorspace = V4L2_COLORSPACE_SMPTE170M,
952 };
953 unsigned int img_height_max;
954 int ret;
955
956 if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
957 sel->target != V4L2_SEL_TGT_COMPOSE)
958 return -EINVAL;
959
960 if (vb2_is_busy(&vou_dev->queue))
961 return -EBUSY;
962
963 if (vou_dev->std & V4L2_STD_525_60)
964 img_height_max = 480;
965 else
966 img_height_max = 576;
967
968 v4l_bound_align_image(&rect->width,
969 VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 1,
970 &rect->height,
971 VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
972
973 if (rect->width + rect->left > VOU_MAX_IMAGE_WIDTH)
974 rect->left = VOU_MAX_IMAGE_WIDTH - rect->width;
975
976 if (rect->height + rect->top > img_height_max)
977 rect->top = img_height_max - rect->height;
978
979 geo.output = *rect;
980 geo.in_width = pix->width;
981 geo.in_height = pix->height;
982
983 /* Configure the encoder one-to-one, position at 0, ignore errors */
984 sd_crop.c.width = geo.output.width;
985 sd_crop.c.height = geo.output.height;
986 /*
987 * We first issue a S_CROP, so that the subsequent S_FMT delivers the
988 * final encoder configuration.
989 */
990 v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
991 s_crop, &sd_crop);
992 format.format.width = geo.output.width;
993 format.format.height = geo.output.height;
994 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
995 set_fmt, NULL, &format);
996 /* Must be implemented, so, don't check for -ENOIOCTLCMD */
997 if (ret < 0)
998 return ret;
999
1000 /* Sanity checks */
1001 if ((unsigned)format.format.width > VOU_MAX_IMAGE_WIDTH ||
1002 (unsigned)format.format.height > img_height_max ||
1003 format.format.code != MEDIA_BUS_FMT_YUYV8_2X8)
1004 return -EIO;
1005
1006 geo.output.width = format.format.width;
1007 geo.output.height = format.format.height;
1008
1009 /*
1010 * No down-scaling. According to the API, current call has precedence:
1011 * http://v4l2spec.bytesex.org/spec/x1904.htm#AEN1954 paragraph two.
1012 */
1013 vou_adjust_input(&geo, vou_dev->std);
1014
1015 /* We tried to preserve output rectangle, but it could have changed */
1016 vou_dev->rect = geo.output;
1017 pix->width = geo.in_width;
1018 pix->height = geo.in_height;
1019
1020 sh_vou_configure_geometry(vou_dev, vou_dev->pix_idx,
1021 geo.scale_idx_h, geo.scale_idx_v);
1022
1023 return 0;
1024 }
1025
sh_vou_isr(int irq,void * dev_id)1026 static irqreturn_t sh_vou_isr(int irq, void *dev_id)
1027 {
1028 struct sh_vou_device *vou_dev = dev_id;
1029 static unsigned long j;
1030 struct sh_vou_buffer *vb;
1031 static int cnt;
1032 u32 irq_status = sh_vou_reg_a_read(vou_dev, VOUIR), masked;
1033 u32 vou_status = sh_vou_reg_a_read(vou_dev, VOUSTR);
1034
1035 if (!(irq_status & 0x300)) {
1036 if (printk_timed_ratelimit(&j, 500))
1037 dev_warn(vou_dev->v4l2_dev.dev, "IRQ status 0x%x!\n",
1038 irq_status);
1039 return IRQ_NONE;
1040 }
1041
1042 spin_lock(&vou_dev->lock);
1043 if (!vou_dev->active || list_empty(&vou_dev->buf_list)) {
1044 if (printk_timed_ratelimit(&j, 500))
1045 dev_warn(vou_dev->v4l2_dev.dev,
1046 "IRQ without active buffer: %x!\n", irq_status);
1047 /* Just ack: buf_release will disable further interrupts */
1048 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x300);
1049 spin_unlock(&vou_dev->lock);
1050 return IRQ_HANDLED;
1051 }
1052
1053 masked = ~(0x300 & irq_status) & irq_status & 0x30304;
1054 dev_dbg(vou_dev->v4l2_dev.dev,
1055 "IRQ status 0x%x -> 0x%x, VOU status 0x%x, cnt %d\n",
1056 irq_status, masked, vou_status, cnt);
1057
1058 cnt++;
1059 /* side = vou_status & 0x10000; */
1060
1061 /* Clear only set interrupts */
1062 sh_vou_reg_a_write(vou_dev, VOUIR, masked);
1063
1064 vb = vou_dev->active;
1065 if (list_is_singular(&vb->list)) {
1066 /* Keep cycling while no next buffer is available */
1067 sh_vou_schedule_next(vou_dev, &vb->vb);
1068 spin_unlock(&vou_dev->lock);
1069 return IRQ_HANDLED;
1070 }
1071
1072 list_del(&vb->list);
1073
1074 v4l2_get_timestamp(&vb->vb.timestamp);
1075 vb->vb.sequence = vou_dev->sequence++;
1076 vb->vb.field = V4L2_FIELD_INTERLACED;
1077 vb2_buffer_done(&vb->vb.vb2_buf, VB2_BUF_STATE_DONE);
1078
1079 vou_dev->active = list_entry(vou_dev->buf_list.next,
1080 struct sh_vou_buffer, list);
1081
1082 if (list_is_singular(&vou_dev->buf_list)) {
1083 /* Keep cycling while no next buffer is available */
1084 sh_vou_schedule_next(vou_dev, &vou_dev->active->vb);
1085 } else {
1086 struct sh_vou_buffer *new = list_entry(vou_dev->active->list.next,
1087 struct sh_vou_buffer, list);
1088 sh_vou_schedule_next(vou_dev, &new->vb);
1089 }
1090
1091 spin_unlock(&vou_dev->lock);
1092
1093 return IRQ_HANDLED;
1094 }
1095
sh_vou_hw_init(struct sh_vou_device * vou_dev)1096 static int sh_vou_hw_init(struct sh_vou_device *vou_dev)
1097 {
1098 struct sh_vou_pdata *pdata = vou_dev->pdata;
1099 u32 voucr = sh_vou_ntsc_mode(pdata->bus_fmt) << 29;
1100 int i = 100;
1101
1102 /* Disable all IRQs */
1103 sh_vou_reg_a_write(vou_dev, VOUIR, 0);
1104
1105 /* Reset VOU interfaces - registers unaffected */
1106 sh_vou_reg_a_write(vou_dev, VOUSRR, 0x101);
1107 while (--i && (sh_vou_reg_a_read(vou_dev, VOUSRR) & 0x101))
1108 udelay(1);
1109
1110 if (!i)
1111 return -ETIMEDOUT;
1112
1113 dev_dbg(vou_dev->v4l2_dev.dev, "Reset took %dus\n", 100 - i);
1114
1115 if (pdata->flags & SH_VOU_PCLK_FALLING)
1116 voucr |= 1 << 28;
1117 if (pdata->flags & SH_VOU_HSYNC_LOW)
1118 voucr |= 1 << 27;
1119 if (pdata->flags & SH_VOU_VSYNC_LOW)
1120 voucr |= 1 << 26;
1121 sh_vou_reg_ab_set(vou_dev, VOUCR, voucr, 0xfc000000);
1122
1123 /* Manual register side switching at first */
1124 sh_vou_reg_a_write(vou_dev, VOURCR, 4);
1125 /* Default - fixed HSYNC length, can be made configurable is required */
1126 sh_vou_reg_ab_write(vou_dev, VOUMSR, 0x800000);
1127
1128 sh_vou_set_fmt_vid_out(vou_dev, &vou_dev->pix);
1129
1130 return 0;
1131 }
1132
1133 /* File operations */
sh_vou_open(struct file * file)1134 static int sh_vou_open(struct file *file)
1135 {
1136 struct sh_vou_device *vou_dev = video_drvdata(file);
1137 int err;
1138
1139 if (mutex_lock_interruptible(&vou_dev->fop_lock))
1140 return -ERESTARTSYS;
1141
1142 err = v4l2_fh_open(file);
1143 if (err)
1144 goto done_open;
1145 if (v4l2_fh_is_singular_file(file) &&
1146 vou_dev->status == SH_VOU_INITIALISING) {
1147 /* First open */
1148 pm_runtime_get_sync(vou_dev->v4l2_dev.dev);
1149 err = sh_vou_hw_init(vou_dev);
1150 if (err < 0) {
1151 pm_runtime_put(vou_dev->v4l2_dev.dev);
1152 v4l2_fh_release(file);
1153 } else {
1154 vou_dev->status = SH_VOU_IDLE;
1155 }
1156 }
1157 done_open:
1158 mutex_unlock(&vou_dev->fop_lock);
1159 return err;
1160 }
1161
sh_vou_release(struct file * file)1162 static int sh_vou_release(struct file *file)
1163 {
1164 struct sh_vou_device *vou_dev = video_drvdata(file);
1165 bool is_last;
1166
1167 mutex_lock(&vou_dev->fop_lock);
1168 is_last = v4l2_fh_is_singular_file(file);
1169 _vb2_fop_release(file, NULL);
1170 if (is_last) {
1171 /* Last close */
1172 vou_dev->status = SH_VOU_INITIALISING;
1173 sh_vou_reg_a_set(vou_dev, VOUER, 0, 0x101);
1174 pm_runtime_put(vou_dev->v4l2_dev.dev);
1175 }
1176 mutex_unlock(&vou_dev->fop_lock);
1177 return 0;
1178 }
1179
1180 /* sh_vou display ioctl operations */
1181 static const struct v4l2_ioctl_ops sh_vou_ioctl_ops = {
1182 .vidioc_querycap = sh_vou_querycap,
1183 .vidioc_enum_fmt_vid_out = sh_vou_enum_fmt_vid_out,
1184 .vidioc_g_fmt_vid_out = sh_vou_g_fmt_vid_out,
1185 .vidioc_s_fmt_vid_out = sh_vou_s_fmt_vid_out,
1186 .vidioc_try_fmt_vid_out = sh_vou_try_fmt_vid_out,
1187 .vidioc_reqbufs = vb2_ioctl_reqbufs,
1188 .vidioc_create_bufs = vb2_ioctl_create_bufs,
1189 .vidioc_querybuf = vb2_ioctl_querybuf,
1190 .vidioc_qbuf = vb2_ioctl_qbuf,
1191 .vidioc_dqbuf = vb2_ioctl_dqbuf,
1192 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
1193 .vidioc_streamon = vb2_ioctl_streamon,
1194 .vidioc_streamoff = vb2_ioctl_streamoff,
1195 .vidioc_expbuf = vb2_ioctl_expbuf,
1196 .vidioc_g_output = sh_vou_g_output,
1197 .vidioc_s_output = sh_vou_s_output,
1198 .vidioc_enum_output = sh_vou_enum_output,
1199 .vidioc_s_std = sh_vou_s_std,
1200 .vidioc_g_std = sh_vou_g_std,
1201 .vidioc_g_selection = sh_vou_g_selection,
1202 .vidioc_s_selection = sh_vou_s_selection,
1203 .vidioc_log_status = sh_vou_log_status,
1204 };
1205
1206 static const struct v4l2_file_operations sh_vou_fops = {
1207 .owner = THIS_MODULE,
1208 .open = sh_vou_open,
1209 .release = sh_vou_release,
1210 .unlocked_ioctl = video_ioctl2,
1211 .mmap = vb2_fop_mmap,
1212 .poll = vb2_fop_poll,
1213 .write = vb2_fop_write,
1214 };
1215
1216 static const struct video_device sh_vou_video_template = {
1217 .name = "sh_vou",
1218 .fops = &sh_vou_fops,
1219 .ioctl_ops = &sh_vou_ioctl_ops,
1220 .tvnorms = V4L2_STD_525_60, /* PAL only supported in 8-bit non-bt656 mode */
1221 .vfl_dir = VFL_DIR_TX,
1222 };
1223
sh_vou_probe(struct platform_device * pdev)1224 static int sh_vou_probe(struct platform_device *pdev)
1225 {
1226 struct sh_vou_pdata *vou_pdata = pdev->dev.platform_data;
1227 struct v4l2_rect *rect;
1228 struct v4l2_pix_format *pix;
1229 struct i2c_adapter *i2c_adap;
1230 struct video_device *vdev;
1231 struct sh_vou_device *vou_dev;
1232 struct resource *reg_res;
1233 struct v4l2_subdev *subdev;
1234 struct vb2_queue *q;
1235 int irq, ret;
1236
1237 reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1238 irq = platform_get_irq(pdev, 0);
1239
1240 if (!vou_pdata || !reg_res || irq <= 0) {
1241 dev_err(&pdev->dev, "Insufficient VOU platform information.\n");
1242 return -ENODEV;
1243 }
1244
1245 vou_dev = devm_kzalloc(&pdev->dev, sizeof(*vou_dev), GFP_KERNEL);
1246 if (!vou_dev)
1247 return -ENOMEM;
1248
1249 INIT_LIST_HEAD(&vou_dev->buf_list);
1250 spin_lock_init(&vou_dev->lock);
1251 mutex_init(&vou_dev->fop_lock);
1252 vou_dev->pdata = vou_pdata;
1253 vou_dev->status = SH_VOU_INITIALISING;
1254 vou_dev->pix_idx = 1;
1255
1256 rect = &vou_dev->rect;
1257 pix = &vou_dev->pix;
1258
1259 /* Fill in defaults */
1260 vou_dev->std = V4L2_STD_NTSC_M;
1261 rect->left = 0;
1262 rect->top = 0;
1263 rect->width = VOU_MAX_IMAGE_WIDTH;
1264 rect->height = 480;
1265 pix->width = VOU_MAX_IMAGE_WIDTH;
1266 pix->height = 480;
1267 pix->pixelformat = V4L2_PIX_FMT_NV16;
1268 pix->field = V4L2_FIELD_INTERLACED;
1269 pix->bytesperline = VOU_MAX_IMAGE_WIDTH;
1270 pix->sizeimage = VOU_MAX_IMAGE_WIDTH * 2 * 480;
1271 pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
1272
1273 vou_dev->base = devm_ioremap_resource(&pdev->dev, reg_res);
1274 if (IS_ERR(vou_dev->base))
1275 return PTR_ERR(vou_dev->base);
1276
1277 ret = devm_request_irq(&pdev->dev, irq, sh_vou_isr, 0, "vou", vou_dev);
1278 if (ret < 0)
1279 return ret;
1280
1281 ret = v4l2_device_register(&pdev->dev, &vou_dev->v4l2_dev);
1282 if (ret < 0) {
1283 dev_err(&pdev->dev, "Error registering v4l2 device\n");
1284 return ret;
1285 }
1286
1287 vdev = &vou_dev->vdev;
1288 *vdev = sh_vou_video_template;
1289 if (vou_pdata->bus_fmt == SH_VOU_BUS_8BIT)
1290 vdev->tvnorms |= V4L2_STD_PAL;
1291 vdev->v4l2_dev = &vou_dev->v4l2_dev;
1292 vdev->release = video_device_release_empty;
1293 vdev->lock = &vou_dev->fop_lock;
1294
1295 video_set_drvdata(vdev, vou_dev);
1296
1297 /* Initialize the vb2 queue */
1298 q = &vou_dev->queue;
1299 q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1300 q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_WRITE;
1301 q->drv_priv = vou_dev;
1302 q->buf_struct_size = sizeof(struct sh_vou_buffer);
1303 q->ops = &sh_vou_qops;
1304 q->mem_ops = &vb2_dma_contig_memops;
1305 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1306 q->min_buffers_needed = 2;
1307 q->lock = &vou_dev->fop_lock;
1308 ret = vb2_queue_init(q);
1309 if (ret)
1310 goto einitctx;
1311
1312 vou_dev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
1313 if (IS_ERR(vou_dev->alloc_ctx)) {
1314 dev_err(&pdev->dev, "Can't allocate buffer context");
1315 ret = PTR_ERR(vou_dev->alloc_ctx);
1316 goto einitctx;
1317 }
1318 vdev->queue = q;
1319 INIT_LIST_HEAD(&vou_dev->buf_list);
1320
1321 pm_runtime_enable(&pdev->dev);
1322 pm_runtime_resume(&pdev->dev);
1323
1324 i2c_adap = i2c_get_adapter(vou_pdata->i2c_adap);
1325 if (!i2c_adap) {
1326 ret = -ENODEV;
1327 goto ei2cgadap;
1328 }
1329
1330 ret = sh_vou_hw_init(vou_dev);
1331 if (ret < 0)
1332 goto ereset;
1333
1334 subdev = v4l2_i2c_new_subdev_board(&vou_dev->v4l2_dev, i2c_adap,
1335 vou_pdata->board_info, NULL);
1336 if (!subdev) {
1337 ret = -ENOMEM;
1338 goto ei2cnd;
1339 }
1340
1341 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1342 if (ret < 0)
1343 goto evregdev;
1344
1345 return 0;
1346
1347 evregdev:
1348 ei2cnd:
1349 ereset:
1350 i2c_put_adapter(i2c_adap);
1351 ei2cgadap:
1352 vb2_dma_contig_cleanup_ctx(vou_dev->alloc_ctx);
1353 einitctx:
1354 pm_runtime_disable(&pdev->dev);
1355 v4l2_device_unregister(&vou_dev->v4l2_dev);
1356 return ret;
1357 }
1358
sh_vou_remove(struct platform_device * pdev)1359 static int sh_vou_remove(struct platform_device *pdev)
1360 {
1361 struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1362 struct sh_vou_device *vou_dev = container_of(v4l2_dev,
1363 struct sh_vou_device, v4l2_dev);
1364 struct v4l2_subdev *sd = list_entry(v4l2_dev->subdevs.next,
1365 struct v4l2_subdev, list);
1366 struct i2c_client *client = v4l2_get_subdevdata(sd);
1367
1368 pm_runtime_disable(&pdev->dev);
1369 video_unregister_device(&vou_dev->vdev);
1370 i2c_put_adapter(client->adapter);
1371 vb2_dma_contig_cleanup_ctx(vou_dev->alloc_ctx);
1372 v4l2_device_unregister(&vou_dev->v4l2_dev);
1373 return 0;
1374 }
1375
1376 static struct platform_driver __refdata sh_vou = {
1377 .remove = sh_vou_remove,
1378 .driver = {
1379 .name = "sh-vou",
1380 },
1381 };
1382
1383 module_platform_driver_probe(sh_vou, sh_vou_probe);
1384
1385 MODULE_DESCRIPTION("SuperH VOU driver");
1386 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1387 MODULE_LICENSE("GPL v2");
1388 MODULE_VERSION("0.1.0");
1389 MODULE_ALIAS("platform:sh-vou");
1390