1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * SuperH Video Output Unit (VOU) driver
4 *
5 * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
6 */
7
8 #include <linux/dma-mapping.h>
9 #include <linux/delay.h>
10 #include <linux/errno.h>
11 #include <linux/fs.h>
12 #include <linux/i2c.h>
13 #include <linux/init.h>
14 #include <linux/interrupt.h>
15 #include <linux/kernel.h>
16 #include <linux/platform_device.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/slab.h>
19 #include <linux/videodev2.h>
20 #include <linux/module.h>
21
22 #include <media/drv-intf/sh_vou.h>
23 #include <media/v4l2-common.h>
24 #include <media/v4l2-device.h>
25 #include <media/v4l2-ioctl.h>
26 #include <media/v4l2-mediabus.h>
27 #include <media/videobuf2-v4l2.h>
28 #include <media/videobuf2-dma-contig.h>
29
30 /* Mirror addresses are not available for all registers */
31 #define VOUER 0
32 #define VOUCR 4
33 #define VOUSTR 8
34 #define VOUVCR 0xc
35 #define VOUISR 0x10
36 #define VOUBCR 0x14
37 #define VOUDPR 0x18
38 #define VOUDSR 0x1c
39 #define VOUVPR 0x20
40 #define VOUIR 0x24
41 #define VOUSRR 0x28
42 #define VOUMSR 0x2c
43 #define VOUHIR 0x30
44 #define VOUDFR 0x34
45 #define VOUAD1R 0x38
46 #define VOUAD2R 0x3c
47 #define VOUAIR 0x40
48 #define VOUSWR 0x44
49 #define VOURCR 0x48
50 #define VOURPR 0x50
51
52 enum sh_vou_status {
53 SH_VOU_IDLE,
54 SH_VOU_INITIALISING,
55 SH_VOU_RUNNING,
56 };
57
58 #define VOU_MIN_IMAGE_WIDTH 16
59 #define VOU_MAX_IMAGE_WIDTH 720
60 #define VOU_MIN_IMAGE_HEIGHT 16
61
62 struct sh_vou_buffer {
63 struct vb2_v4l2_buffer vb;
64 struct list_head list;
65 };
66
67 static inline struct
to_sh_vou_buffer(struct vb2_v4l2_buffer * vb2)68 sh_vou_buffer *to_sh_vou_buffer(struct vb2_v4l2_buffer *vb2)
69 {
70 return container_of(vb2, struct sh_vou_buffer, vb);
71 }
72
73 struct sh_vou_device {
74 struct v4l2_device v4l2_dev;
75 struct video_device vdev;
76 struct sh_vou_pdata *pdata;
77 spinlock_t lock;
78 void __iomem *base;
79 /* State information */
80 struct v4l2_pix_format pix;
81 struct v4l2_rect rect;
82 struct list_head buf_list;
83 v4l2_std_id std;
84 int pix_idx;
85 struct vb2_queue queue;
86 struct sh_vou_buffer *active;
87 enum sh_vou_status status;
88 unsigned sequence;
89 struct mutex fop_lock;
90 };
91
92 /* 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)93 static void sh_vou_reg_a_write(struct sh_vou_device *vou_dev, unsigned int reg,
94 u32 value)
95 {
96 __raw_writel(value, vou_dev->base + reg);
97 }
98
sh_vou_reg_ab_write(struct sh_vou_device * vou_dev,unsigned int reg,u32 value)99 static void sh_vou_reg_ab_write(struct sh_vou_device *vou_dev, unsigned int reg,
100 u32 value)
101 {
102 __raw_writel(value, vou_dev->base + reg);
103 __raw_writel(value, vou_dev->base + reg + 0x1000);
104 }
105
sh_vou_reg_m_write(struct sh_vou_device * vou_dev,unsigned int reg,u32 value)106 static void sh_vou_reg_m_write(struct sh_vou_device *vou_dev, unsigned int reg,
107 u32 value)
108 {
109 __raw_writel(value, vou_dev->base + reg + 0x2000);
110 }
111
sh_vou_reg_a_read(struct sh_vou_device * vou_dev,unsigned int reg)112 static u32 sh_vou_reg_a_read(struct sh_vou_device *vou_dev, unsigned int reg)
113 {
114 return __raw_readl(vou_dev->base + reg);
115 }
116
sh_vou_reg_a_set(struct sh_vou_device * vou_dev,unsigned int reg,u32 value,u32 mask)117 static void sh_vou_reg_a_set(struct sh_vou_device *vou_dev, unsigned int reg,
118 u32 value, u32 mask)
119 {
120 u32 old = __raw_readl(vou_dev->base + reg);
121
122 value = (value & mask) | (old & ~mask);
123 __raw_writel(value, vou_dev->base + reg);
124 }
125
sh_vou_reg_b_set(struct sh_vou_device * vou_dev,unsigned int reg,u32 value,u32 mask)126 static void sh_vou_reg_b_set(struct sh_vou_device *vou_dev, unsigned int reg,
127 u32 value, u32 mask)
128 {
129 sh_vou_reg_a_set(vou_dev, reg + 0x1000, value, mask);
130 }
131
sh_vou_reg_ab_set(struct sh_vou_device * vou_dev,unsigned int reg,u32 value,u32 mask)132 static void sh_vou_reg_ab_set(struct sh_vou_device *vou_dev, unsigned int reg,
133 u32 value, u32 mask)
134 {
135 sh_vou_reg_a_set(vou_dev, reg, value, mask);
136 sh_vou_reg_b_set(vou_dev, reg, value, mask);
137 }
138
139 struct sh_vou_fmt {
140 u32 pfmt;
141 char *desc;
142 unsigned char bpp;
143 unsigned char bpl;
144 unsigned char rgb;
145 unsigned char yf;
146 unsigned char pkf;
147 };
148
149 /* Further pixel formats can be added */
150 static struct sh_vou_fmt vou_fmt[] = {
151 {
152 .pfmt = V4L2_PIX_FMT_NV12,
153 .bpp = 12,
154 .bpl = 1,
155 .desc = "YVU420 planar",
156 .yf = 0,
157 .rgb = 0,
158 },
159 {
160 .pfmt = V4L2_PIX_FMT_NV16,
161 .bpp = 16,
162 .bpl = 1,
163 .desc = "YVYU planar",
164 .yf = 1,
165 .rgb = 0,
166 },
167 {
168 .pfmt = V4L2_PIX_FMT_RGB24,
169 .bpp = 24,
170 .bpl = 3,
171 .desc = "RGB24",
172 .pkf = 2,
173 .rgb = 1,
174 },
175 {
176 .pfmt = V4L2_PIX_FMT_RGB565,
177 .bpp = 16,
178 .bpl = 2,
179 .desc = "RGB565",
180 .pkf = 3,
181 .rgb = 1,
182 },
183 {
184 .pfmt = V4L2_PIX_FMT_RGB565X,
185 .bpp = 16,
186 .bpl = 2,
187 .desc = "RGB565 byteswapped",
188 .pkf = 3,
189 .rgb = 1,
190 },
191 };
192
sh_vou_schedule_next(struct sh_vou_device * vou_dev,struct vb2_v4l2_buffer * vbuf)193 static void sh_vou_schedule_next(struct sh_vou_device *vou_dev,
194 struct vb2_v4l2_buffer *vbuf)
195 {
196 dma_addr_t addr1, addr2;
197
198 addr1 = vb2_dma_contig_plane_dma_addr(&vbuf->vb2_buf, 0);
199 switch (vou_dev->pix.pixelformat) {
200 case V4L2_PIX_FMT_NV12:
201 case V4L2_PIX_FMT_NV16:
202 addr2 = addr1 + vou_dev->pix.width * vou_dev->pix.height;
203 break;
204 default:
205 addr2 = 0;
206 }
207
208 sh_vou_reg_m_write(vou_dev, VOUAD1R, addr1);
209 sh_vou_reg_m_write(vou_dev, VOUAD2R, addr2);
210 }
211
sh_vou_stream_config(struct sh_vou_device * vou_dev)212 static void sh_vou_stream_config(struct sh_vou_device *vou_dev)
213 {
214 unsigned int row_coeff;
215 #ifdef __LITTLE_ENDIAN
216 u32 dataswap = 7;
217 #else
218 u32 dataswap = 0;
219 #endif
220
221 switch (vou_dev->pix.pixelformat) {
222 default:
223 case V4L2_PIX_FMT_NV12:
224 case V4L2_PIX_FMT_NV16:
225 row_coeff = 1;
226 break;
227 case V4L2_PIX_FMT_RGB565:
228 dataswap ^= 1;
229 /* fall through */
230 case V4L2_PIX_FMT_RGB565X:
231 row_coeff = 2;
232 break;
233 case V4L2_PIX_FMT_RGB24:
234 row_coeff = 3;
235 break;
236 }
237
238 sh_vou_reg_a_write(vou_dev, VOUSWR, dataswap);
239 sh_vou_reg_ab_write(vou_dev, VOUAIR, vou_dev->pix.width * row_coeff);
240 }
241
242 /* Locking: caller holds fop_lock mutex */
sh_vou_queue_setup(struct vb2_queue * vq,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],struct device * alloc_devs[])243 static int sh_vou_queue_setup(struct vb2_queue *vq,
244 unsigned int *nbuffers, unsigned int *nplanes,
245 unsigned int sizes[], struct device *alloc_devs[])
246 {
247 struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
248 struct v4l2_pix_format *pix = &vou_dev->pix;
249 int bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
250
251 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
252
253 if (*nplanes)
254 return sizes[0] < pix->height * bytes_per_line ? -EINVAL : 0;
255 *nplanes = 1;
256 sizes[0] = pix->height * bytes_per_line;
257 return 0;
258 }
259
sh_vou_buf_prepare(struct vb2_buffer * vb)260 static int sh_vou_buf_prepare(struct vb2_buffer *vb)
261 {
262 struct sh_vou_device *vou_dev = vb2_get_drv_priv(vb->vb2_queue);
263 struct v4l2_pix_format *pix = &vou_dev->pix;
264 unsigned bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
265 unsigned size = pix->height * bytes_per_line;
266
267 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
268
269 if (vb2_plane_size(vb, 0) < size) {
270 /* User buffer too small */
271 dev_warn(vou_dev->v4l2_dev.dev, "buffer too small (%lu < %u)\n",
272 vb2_plane_size(vb, 0), size);
273 return -EINVAL;
274 }
275
276 vb2_set_plane_payload(vb, 0, size);
277 return 0;
278 }
279
280 /* Locking: caller holds fop_lock mutex and vq->irqlock spinlock */
sh_vou_buf_queue(struct vb2_buffer * vb)281 static void sh_vou_buf_queue(struct vb2_buffer *vb)
282 {
283 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
284 struct sh_vou_device *vou_dev = vb2_get_drv_priv(vb->vb2_queue);
285 struct sh_vou_buffer *shbuf = to_sh_vou_buffer(vbuf);
286 unsigned long flags;
287
288 spin_lock_irqsave(&vou_dev->lock, flags);
289 list_add_tail(&shbuf->list, &vou_dev->buf_list);
290 spin_unlock_irqrestore(&vou_dev->lock, flags);
291 }
292
sh_vou_start_streaming(struct vb2_queue * vq,unsigned int count)293 static int sh_vou_start_streaming(struct vb2_queue *vq, unsigned int count)
294 {
295 struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
296 struct sh_vou_buffer *buf, *node;
297 int ret;
298
299 vou_dev->sequence = 0;
300 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
301 video, s_stream, 1);
302 if (ret < 0 && ret != -ENOIOCTLCMD) {
303 list_for_each_entry_safe(buf, node, &vou_dev->buf_list, list) {
304 vb2_buffer_done(&buf->vb.vb2_buf,
305 VB2_BUF_STATE_QUEUED);
306 list_del(&buf->list);
307 }
308 vou_dev->active = NULL;
309 return ret;
310 }
311
312 buf = list_entry(vou_dev->buf_list.next, struct sh_vou_buffer, list);
313
314 vou_dev->active = buf;
315
316 /* Start from side A: we use mirror addresses, so, set B */
317 sh_vou_reg_a_write(vou_dev, VOURPR, 1);
318 dev_dbg(vou_dev->v4l2_dev.dev, "%s: first buffer status 0x%x\n",
319 __func__, sh_vou_reg_a_read(vou_dev, VOUSTR));
320 sh_vou_schedule_next(vou_dev, &buf->vb);
321
322 buf = list_entry(buf->list.next, struct sh_vou_buffer, list);
323
324 /* Second buffer - initialise register side B */
325 sh_vou_reg_a_write(vou_dev, VOURPR, 0);
326 sh_vou_schedule_next(vou_dev, &buf->vb);
327
328 /* Register side switching with frame VSYNC */
329 sh_vou_reg_a_write(vou_dev, VOURCR, 5);
330
331 sh_vou_stream_config(vou_dev);
332 /* Enable End-of-Frame (VSYNC) interrupts */
333 sh_vou_reg_a_write(vou_dev, VOUIR, 0x10004);
334
335 /* Two buffers on the queue - activate the hardware */
336 vou_dev->status = SH_VOU_RUNNING;
337 sh_vou_reg_a_write(vou_dev, VOUER, 0x107);
338 return 0;
339 }
340
sh_vou_stop_streaming(struct vb2_queue * vq)341 static void sh_vou_stop_streaming(struct vb2_queue *vq)
342 {
343 struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
344 struct sh_vou_buffer *buf, *node;
345 unsigned long flags;
346
347 v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
348 video, s_stream, 0);
349 /* disable output */
350 sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
351 /* ...but the current frame will complete */
352 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
353 msleep(50);
354 spin_lock_irqsave(&vou_dev->lock, flags);
355 list_for_each_entry_safe(buf, node, &vou_dev->buf_list, list) {
356 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
357 list_del(&buf->list);
358 }
359 vou_dev->active = NULL;
360 spin_unlock_irqrestore(&vou_dev->lock, flags);
361 }
362
363 static const struct vb2_ops sh_vou_qops = {
364 .queue_setup = sh_vou_queue_setup,
365 .buf_prepare = sh_vou_buf_prepare,
366 .buf_queue = sh_vou_buf_queue,
367 .start_streaming = sh_vou_start_streaming,
368 .stop_streaming = sh_vou_stop_streaming,
369 .wait_prepare = vb2_ops_wait_prepare,
370 .wait_finish = vb2_ops_wait_finish,
371 };
372
373 /* Video IOCTLs */
sh_vou_querycap(struct file * file,void * priv,struct v4l2_capability * cap)374 static int sh_vou_querycap(struct file *file, void *priv,
375 struct v4l2_capability *cap)
376 {
377 struct sh_vou_device *vou_dev = video_drvdata(file);
378
379 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
380
381 strlcpy(cap->card, "SuperH VOU", sizeof(cap->card));
382 strlcpy(cap->driver, "sh-vou", sizeof(cap->driver));
383 strlcpy(cap->bus_info, "platform:sh-vou", sizeof(cap->bus_info));
384 cap->device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_READWRITE |
385 V4L2_CAP_STREAMING;
386 cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
387 return 0;
388 }
389
390 /* 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)391 static int sh_vou_enum_fmt_vid_out(struct file *file, void *priv,
392 struct v4l2_fmtdesc *fmt)
393 {
394 struct sh_vou_device *vou_dev = video_drvdata(file);
395
396 if (fmt->index >= ARRAY_SIZE(vou_fmt))
397 return -EINVAL;
398
399 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
400
401 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
402 strlcpy(fmt->description, vou_fmt[fmt->index].desc,
403 sizeof(fmt->description));
404 fmt->pixelformat = vou_fmt[fmt->index].pfmt;
405
406 return 0;
407 }
408
sh_vou_g_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * fmt)409 static int sh_vou_g_fmt_vid_out(struct file *file, void *priv,
410 struct v4l2_format *fmt)
411 {
412 struct sh_vou_device *vou_dev = video_drvdata(file);
413
414 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
415
416 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
417 fmt->fmt.pix = vou_dev->pix;
418
419 return 0;
420 }
421
422 static const unsigned char vou_scale_h_num[] = {1, 9, 2, 9, 4};
423 static const unsigned char vou_scale_h_den[] = {1, 8, 1, 4, 1};
424 static const unsigned char vou_scale_h_fld[] = {0, 2, 1, 3};
425 static const unsigned char vou_scale_v_num[] = {1, 2, 4};
426 static const unsigned char vou_scale_v_den[] = {1, 1, 1};
427 static const unsigned char vou_scale_v_fld[] = {0, 1};
428
sh_vou_configure_geometry(struct sh_vou_device * vou_dev,int pix_idx,int w_idx,int h_idx)429 static void sh_vou_configure_geometry(struct sh_vou_device *vou_dev,
430 int pix_idx, int w_idx, int h_idx)
431 {
432 struct sh_vou_fmt *fmt = vou_fmt + pix_idx;
433 unsigned int black_left, black_top, width_max,
434 frame_in_height, frame_out_height, frame_out_top;
435 struct v4l2_rect *rect = &vou_dev->rect;
436 struct v4l2_pix_format *pix = &vou_dev->pix;
437 u32 vouvcr = 0, dsr_h, dsr_v;
438
439 if (vou_dev->std & V4L2_STD_525_60) {
440 width_max = 858;
441 /* height_max = 262; */
442 } else {
443 width_max = 864;
444 /* height_max = 312; */
445 }
446
447 frame_in_height = pix->height / 2;
448 frame_out_height = rect->height / 2;
449 frame_out_top = rect->top / 2;
450
451 /*
452 * Cropping scheme: max useful image is 720x480, and the total video
453 * area is 858x525 (NTSC) or 864x625 (PAL). AK8813 / 8814 starts
454 * sampling data beginning with fixed 276th (NTSC) / 288th (PAL) clock,
455 * of which the first 33 / 25 clocks HSYNC must be held active. This
456 * has to be configured in CR[HW]. 1 pixel equals 2 clock periods.
457 * This gives CR[HW] = 16 / 12, VPR[HVP] = 138 / 144, which gives
458 * exactly 858 - 138 = 864 - 144 = 720! We call the out-of-display area,
459 * beyond DSR, specified on the left and top by the VPR register "black
460 * pixels" and out-of-image area (DPR) "background pixels." We fix VPR
461 * at 138 / 144 : 20, because that's the HSYNC timing, that our first
462 * client requires, and that's exactly what leaves us 720 pixels for the
463 * image; we leave VPR[VVP] at default 20 for now, because the client
464 * doesn't seem to have any special requirements for it. Otherwise we
465 * could also set it to max - 240 = 22 / 72. Thus VPR depends only on
466 * the selected standard, and DPR and DSR are selected according to
467 * cropping. Q: how does the client detect the first valid line? Does
468 * HSYNC stay inactive during invalid (black) lines?
469 */
470 black_left = width_max - VOU_MAX_IMAGE_WIDTH;
471 black_top = 20;
472
473 dsr_h = rect->width + rect->left;
474 dsr_v = frame_out_height + frame_out_top;
475
476 dev_dbg(vou_dev->v4l2_dev.dev,
477 "image %ux%u, black %u:%u, offset %u:%u, display %ux%u\n",
478 pix->width, frame_in_height, black_left, black_top,
479 rect->left, frame_out_top, dsr_h, dsr_v);
480
481 /* VOUISR height - half of a frame height in frame mode */
482 sh_vou_reg_ab_write(vou_dev, VOUISR, (pix->width << 16) | frame_in_height);
483 sh_vou_reg_ab_write(vou_dev, VOUVPR, (black_left << 16) | black_top);
484 sh_vou_reg_ab_write(vou_dev, VOUDPR, (rect->left << 16) | frame_out_top);
485 sh_vou_reg_ab_write(vou_dev, VOUDSR, (dsr_h << 16) | dsr_v);
486
487 /*
488 * if necessary, we could set VOUHIR to
489 * max(black_left + dsr_h, width_max) here
490 */
491
492 if (w_idx)
493 vouvcr |= (1 << 15) | (vou_scale_h_fld[w_idx - 1] << 4);
494 if (h_idx)
495 vouvcr |= (1 << 14) | vou_scale_v_fld[h_idx - 1];
496
497 dev_dbg(vou_dev->v4l2_dev.dev, "%s: scaling 0x%x\n", fmt->desc, vouvcr);
498
499 /* To produce a colour bar for testing set bit 23 of VOUVCR */
500 sh_vou_reg_ab_write(vou_dev, VOUVCR, vouvcr);
501 sh_vou_reg_ab_write(vou_dev, VOUDFR,
502 fmt->pkf | (fmt->yf << 8) | (fmt->rgb << 16));
503 }
504
505 struct sh_vou_geometry {
506 struct v4l2_rect output;
507 unsigned int in_width;
508 unsigned int in_height;
509 int scale_idx_h;
510 int scale_idx_v;
511 };
512
513 /*
514 * Find input geometry, that we can use to produce output, closest to the
515 * requested rectangle, using VOU scaling
516 */
vou_adjust_input(struct sh_vou_geometry * geo,v4l2_std_id std)517 static void vou_adjust_input(struct sh_vou_geometry *geo, v4l2_std_id std)
518 {
519 /* The compiler cannot know, that best and idx will indeed be set */
520 unsigned int best_err = UINT_MAX, best = 0, img_height_max;
521 int i, idx = 0;
522
523 if (std & V4L2_STD_525_60)
524 img_height_max = 480;
525 else
526 img_height_max = 576;
527
528 /* Image width must be a multiple of 4 */
529 v4l_bound_align_image(&geo->in_width,
530 VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 2,
531 &geo->in_height,
532 VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
533
534 /* Select scales to come as close as possible to the output image */
535 for (i = ARRAY_SIZE(vou_scale_h_num) - 1; i >= 0; i--) {
536 unsigned int err;
537 unsigned int found = geo->output.width * vou_scale_h_den[i] /
538 vou_scale_h_num[i];
539
540 if (found > VOU_MAX_IMAGE_WIDTH)
541 /* scales increase */
542 break;
543
544 err = abs(found - geo->in_width);
545 if (err < best_err) {
546 best_err = err;
547 idx = i;
548 best = found;
549 }
550 if (!err)
551 break;
552 }
553
554 geo->in_width = best;
555 geo->scale_idx_h = idx;
556
557 best_err = UINT_MAX;
558
559 /* This loop can be replaced with one division */
560 for (i = ARRAY_SIZE(vou_scale_v_num) - 1; i >= 0; i--) {
561 unsigned int err;
562 unsigned int found = geo->output.height * vou_scale_v_den[i] /
563 vou_scale_v_num[i];
564
565 if (found > img_height_max)
566 /* scales increase */
567 break;
568
569 err = abs(found - geo->in_height);
570 if (err < best_err) {
571 best_err = err;
572 idx = i;
573 best = found;
574 }
575 if (!err)
576 break;
577 }
578
579 geo->in_height = best;
580 geo->scale_idx_v = idx;
581 }
582
583 /*
584 * Find output geometry, that we can produce, using VOU scaling, closest to
585 * the requested rectangle
586 */
vou_adjust_output(struct sh_vou_geometry * geo,v4l2_std_id std)587 static void vou_adjust_output(struct sh_vou_geometry *geo, v4l2_std_id std)
588 {
589 unsigned int best_err = UINT_MAX, best = geo->in_width,
590 width_max, height_max, img_height_max;
591 int i, idx_h = 0, idx_v = 0;
592
593 if (std & V4L2_STD_525_60) {
594 width_max = 858;
595 height_max = 262 * 2;
596 img_height_max = 480;
597 } else {
598 width_max = 864;
599 height_max = 312 * 2;
600 img_height_max = 576;
601 }
602
603 /* Select scales to come as close as possible to the output image */
604 for (i = 0; i < ARRAY_SIZE(vou_scale_h_num); i++) {
605 unsigned int err;
606 unsigned int found = geo->in_width * vou_scale_h_num[i] /
607 vou_scale_h_den[i];
608
609 if (found > VOU_MAX_IMAGE_WIDTH)
610 /* scales increase */
611 break;
612
613 err = abs(found - geo->output.width);
614 if (err < best_err) {
615 best_err = err;
616 idx_h = i;
617 best = found;
618 }
619 if (!err)
620 break;
621 }
622
623 geo->output.width = best;
624 geo->scale_idx_h = idx_h;
625 if (geo->output.left + best > width_max)
626 geo->output.left = width_max - best;
627
628 pr_debug("%s(): W %u * %u/%u = %u\n", __func__, geo->in_width,
629 vou_scale_h_num[idx_h], vou_scale_h_den[idx_h], best);
630
631 best_err = UINT_MAX;
632
633 /* This loop can be replaced with one division */
634 for (i = 0; i < ARRAY_SIZE(vou_scale_v_num); i++) {
635 unsigned int err;
636 unsigned int found = geo->in_height * vou_scale_v_num[i] /
637 vou_scale_v_den[i];
638
639 if (found > img_height_max)
640 /* scales increase */
641 break;
642
643 err = abs(found - geo->output.height);
644 if (err < best_err) {
645 best_err = err;
646 idx_v = i;
647 best = found;
648 }
649 if (!err)
650 break;
651 }
652
653 geo->output.height = best;
654 geo->scale_idx_v = idx_v;
655 if (geo->output.top + best > height_max)
656 geo->output.top = height_max - best;
657
658 pr_debug("%s(): H %u * %u/%u = %u\n", __func__, geo->in_height,
659 vou_scale_v_num[idx_v], vou_scale_v_den[idx_v], best);
660 }
661
sh_vou_try_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * fmt)662 static int sh_vou_try_fmt_vid_out(struct file *file, void *priv,
663 struct v4l2_format *fmt)
664 {
665 struct sh_vou_device *vou_dev = video_drvdata(file);
666 struct v4l2_pix_format *pix = &fmt->fmt.pix;
667 unsigned int img_height_max;
668 int pix_idx;
669
670 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
671
672 pix->field = V4L2_FIELD_INTERLACED;
673 pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
674 pix->ycbcr_enc = pix->quantization = 0;
675
676 for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
677 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
678 break;
679
680 if (pix_idx == ARRAY_SIZE(vou_fmt))
681 return -EINVAL;
682
683 if (vou_dev->std & V4L2_STD_525_60)
684 img_height_max = 480;
685 else
686 img_height_max = 576;
687
688 v4l_bound_align_image(&pix->width,
689 VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 2,
690 &pix->height,
691 VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
692 pix->bytesperline = pix->width * vou_fmt[pix_idx].bpl;
693 pix->sizeimage = pix->height * ((pix->width * vou_fmt[pix_idx].bpp) >> 3);
694
695 return 0;
696 }
697
sh_vou_set_fmt_vid_out(struct sh_vou_device * vou_dev,struct v4l2_pix_format * pix)698 static int sh_vou_set_fmt_vid_out(struct sh_vou_device *vou_dev,
699 struct v4l2_pix_format *pix)
700 {
701 unsigned int img_height_max;
702 struct sh_vou_geometry geo;
703 struct v4l2_subdev_format format = {
704 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
705 /* Revisit: is this the correct code? */
706 .format.code = MEDIA_BUS_FMT_YUYV8_2X8,
707 .format.field = V4L2_FIELD_INTERLACED,
708 .format.colorspace = V4L2_COLORSPACE_SMPTE170M,
709 };
710 struct v4l2_mbus_framefmt *mbfmt = &format.format;
711 int pix_idx;
712 int ret;
713
714 if (vb2_is_busy(&vou_dev->queue))
715 return -EBUSY;
716
717 for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
718 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
719 break;
720
721 geo.in_width = pix->width;
722 geo.in_height = pix->height;
723 geo.output = vou_dev->rect;
724
725 vou_adjust_output(&geo, vou_dev->std);
726
727 mbfmt->width = geo.output.width;
728 mbfmt->height = geo.output.height;
729 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
730 set_fmt, NULL, &format);
731 /* Must be implemented, so, don't check for -ENOIOCTLCMD */
732 if (ret < 0)
733 return ret;
734
735 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
736 geo.output.width, geo.output.height, mbfmt->width, mbfmt->height);
737
738 if (vou_dev->std & V4L2_STD_525_60)
739 img_height_max = 480;
740 else
741 img_height_max = 576;
742
743 /* Sanity checks */
744 if ((unsigned)mbfmt->width > VOU_MAX_IMAGE_WIDTH ||
745 (unsigned)mbfmt->height > img_height_max ||
746 mbfmt->code != MEDIA_BUS_FMT_YUYV8_2X8)
747 return -EIO;
748
749 if (mbfmt->width != geo.output.width ||
750 mbfmt->height != geo.output.height) {
751 geo.output.width = mbfmt->width;
752 geo.output.height = mbfmt->height;
753
754 vou_adjust_input(&geo, vou_dev->std);
755 }
756
757 /* We tried to preserve output rectangle, but it could have changed */
758 vou_dev->rect = geo.output;
759 pix->width = geo.in_width;
760 pix->height = geo.in_height;
761
762 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u\n", __func__,
763 pix->width, pix->height);
764
765 vou_dev->pix_idx = pix_idx;
766
767 vou_dev->pix = *pix;
768
769 sh_vou_configure_geometry(vou_dev, pix_idx,
770 geo.scale_idx_h, geo.scale_idx_v);
771
772 return 0;
773 }
774
sh_vou_s_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * fmt)775 static int sh_vou_s_fmt_vid_out(struct file *file, void *priv,
776 struct v4l2_format *fmt)
777 {
778 struct sh_vou_device *vou_dev = video_drvdata(file);
779 int ret = sh_vou_try_fmt_vid_out(file, priv, fmt);
780
781 if (ret)
782 return ret;
783 return sh_vou_set_fmt_vid_out(vou_dev, &fmt->fmt.pix);
784 }
785
sh_vou_enum_output(struct file * file,void * fh,struct v4l2_output * a)786 static int sh_vou_enum_output(struct file *file, void *fh,
787 struct v4l2_output *a)
788 {
789 struct sh_vou_device *vou_dev = video_drvdata(file);
790
791 if (a->index)
792 return -EINVAL;
793 strlcpy(a->name, "Video Out", sizeof(a->name));
794 a->type = V4L2_OUTPUT_TYPE_ANALOG;
795 a->std = vou_dev->vdev.tvnorms;
796 return 0;
797 }
798
sh_vou_g_output(struct file * file,void * fh,unsigned int * i)799 static int sh_vou_g_output(struct file *file, void *fh, unsigned int *i)
800 {
801 *i = 0;
802 return 0;
803 }
804
sh_vou_s_output(struct file * file,void * fh,unsigned int i)805 static int sh_vou_s_output(struct file *file, void *fh, unsigned int i)
806 {
807 return i ? -EINVAL : 0;
808 }
809
sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)810 static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)
811 {
812 switch (bus_fmt) {
813 default:
814 pr_warn("%s(): Invalid bus-format code %d, using default 8-bit\n",
815 __func__, bus_fmt);
816 /* fall through */
817 case SH_VOU_BUS_8BIT:
818 return 1;
819 case SH_VOU_BUS_16BIT:
820 return 0;
821 case SH_VOU_BUS_BT656:
822 return 3;
823 }
824 }
825
sh_vou_s_std(struct file * file,void * priv,v4l2_std_id std_id)826 static int sh_vou_s_std(struct file *file, void *priv, v4l2_std_id std_id)
827 {
828 struct sh_vou_device *vou_dev = video_drvdata(file);
829 int ret;
830
831 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): 0x%llx\n", __func__, std_id);
832
833 if (std_id == vou_dev->std)
834 return 0;
835
836 if (vb2_is_busy(&vou_dev->queue))
837 return -EBUSY;
838
839 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
840 s_std_output, std_id);
841 /* Shall we continue, if the subdev doesn't support .s_std_output()? */
842 if (ret < 0 && ret != -ENOIOCTLCMD)
843 return ret;
844
845 vou_dev->rect.top = vou_dev->rect.left = 0;
846 vou_dev->rect.width = VOU_MAX_IMAGE_WIDTH;
847 if (std_id & V4L2_STD_525_60) {
848 sh_vou_reg_ab_set(vou_dev, VOUCR,
849 sh_vou_ntsc_mode(vou_dev->pdata->bus_fmt) << 29, 7 << 29);
850 vou_dev->rect.height = 480;
851 } else {
852 sh_vou_reg_ab_set(vou_dev, VOUCR, 5 << 29, 7 << 29);
853 vou_dev->rect.height = 576;
854 }
855
856 vou_dev->pix.width = vou_dev->rect.width;
857 vou_dev->pix.height = vou_dev->rect.height;
858 vou_dev->pix.bytesperline =
859 vou_dev->pix.width * vou_fmt[vou_dev->pix_idx].bpl;
860 vou_dev->pix.sizeimage = vou_dev->pix.height *
861 ((vou_dev->pix.width * vou_fmt[vou_dev->pix_idx].bpp) >> 3);
862 vou_dev->std = std_id;
863 sh_vou_set_fmt_vid_out(vou_dev, &vou_dev->pix);
864
865 return 0;
866 }
867
sh_vou_g_std(struct file * file,void * priv,v4l2_std_id * std)868 static int sh_vou_g_std(struct file *file, void *priv, v4l2_std_id *std)
869 {
870 struct sh_vou_device *vou_dev = video_drvdata(file);
871
872 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
873
874 *std = vou_dev->std;
875
876 return 0;
877 }
878
sh_vou_log_status(struct file * file,void * priv)879 static int sh_vou_log_status(struct file *file, void *priv)
880 {
881 struct sh_vou_device *vou_dev = video_drvdata(file);
882
883 pr_info("VOUER: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUER));
884 pr_info("VOUCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUCR));
885 pr_info("VOUSTR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSTR));
886 pr_info("VOUVCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUVCR));
887 pr_info("VOUISR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUISR));
888 pr_info("VOUBCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUBCR));
889 pr_info("VOUDPR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDPR));
890 pr_info("VOUDSR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDSR));
891 pr_info("VOUVPR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUVPR));
892 pr_info("VOUIR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUIR));
893 pr_info("VOUSRR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSRR));
894 pr_info("VOUMSR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUMSR));
895 pr_info("VOUHIR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUHIR));
896 pr_info("VOUDFR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDFR));
897 pr_info("VOUAD1R: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAD1R));
898 pr_info("VOUAD2R: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAD2R));
899 pr_info("VOUAIR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAIR));
900 pr_info("VOUSWR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSWR));
901 pr_info("VOURCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOURCR));
902 pr_info("VOURPR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOURPR));
903 return 0;
904 }
905
sh_vou_g_selection(struct file * file,void * fh,struct v4l2_selection * sel)906 static int sh_vou_g_selection(struct file *file, void *fh,
907 struct v4l2_selection *sel)
908 {
909 struct sh_vou_device *vou_dev = video_drvdata(file);
910
911 if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
912 return -EINVAL;
913 switch (sel->target) {
914 case V4L2_SEL_TGT_COMPOSE:
915 sel->r = vou_dev->rect;
916 break;
917 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
918 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
919 sel->r.left = 0;
920 sel->r.top = 0;
921 sel->r.width = VOU_MAX_IMAGE_WIDTH;
922 if (vou_dev->std & V4L2_STD_525_60)
923 sel->r.height = 480;
924 else
925 sel->r.height = 576;
926 break;
927 default:
928 return -EINVAL;
929 }
930 return 0;
931 }
932
933 /* Assume a dull encoder, do all the work ourselves. */
sh_vou_s_selection(struct file * file,void * fh,struct v4l2_selection * sel)934 static int sh_vou_s_selection(struct file *file, void *fh,
935 struct v4l2_selection *sel)
936 {
937 struct v4l2_rect *rect = &sel->r;
938 struct sh_vou_device *vou_dev = video_drvdata(file);
939 struct v4l2_subdev_selection sd_sel = {
940 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
941 .target = V4L2_SEL_TGT_COMPOSE,
942 };
943 struct v4l2_pix_format *pix = &vou_dev->pix;
944 struct sh_vou_geometry geo;
945 struct v4l2_subdev_format format = {
946 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
947 /* Revisit: is this the correct code? */
948 .format.code = MEDIA_BUS_FMT_YUYV8_2X8,
949 .format.field = V4L2_FIELD_INTERLACED,
950 .format.colorspace = V4L2_COLORSPACE_SMPTE170M,
951 };
952 unsigned int img_height_max;
953 int ret;
954
955 if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
956 sel->target != V4L2_SEL_TGT_COMPOSE)
957 return -EINVAL;
958
959 if (vb2_is_busy(&vou_dev->queue))
960 return -EBUSY;
961
962 if (vou_dev->std & V4L2_STD_525_60)
963 img_height_max = 480;
964 else
965 img_height_max = 576;
966
967 v4l_bound_align_image(&rect->width,
968 VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 1,
969 &rect->height,
970 VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
971
972 if (rect->width + rect->left > VOU_MAX_IMAGE_WIDTH)
973 rect->left = VOU_MAX_IMAGE_WIDTH - rect->width;
974
975 if (rect->height + rect->top > img_height_max)
976 rect->top = img_height_max - rect->height;
977
978 geo.output = *rect;
979 geo.in_width = pix->width;
980 geo.in_height = pix->height;
981
982 /* Configure the encoder one-to-one, position at 0, ignore errors */
983 sd_sel.r.width = geo.output.width;
984 sd_sel.r.height = geo.output.height;
985 /*
986 * We first issue a S_SELECTION, so that the subsequent S_FMT delivers the
987 * final encoder configuration.
988 */
989 v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
990 set_selection, NULL, &sd_sel);
991 format.format.width = geo.output.width;
992 format.format.height = geo.output.height;
993 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
994 set_fmt, NULL, &format);
995 /* Must be implemented, so, don't check for -ENOIOCTLCMD */
996 if (ret < 0)
997 return ret;
998
999 /* Sanity checks */
1000 if ((unsigned)format.format.width > VOU_MAX_IMAGE_WIDTH ||
1001 (unsigned)format.format.height > img_height_max ||
1002 format.format.code != MEDIA_BUS_FMT_YUYV8_2X8)
1003 return -EIO;
1004
1005 geo.output.width = format.format.width;
1006 geo.output.height = format.format.height;
1007
1008 /*
1009 * No down-scaling. According to the API, current call has precedence:
1010 * http://v4l2spec.bytesex.org/spec/x1904.htm#AEN1954 paragraph two.
1011 */
1012 vou_adjust_input(&geo, vou_dev->std);
1013
1014 /* We tried to preserve output rectangle, but it could have changed */
1015 vou_dev->rect = geo.output;
1016 pix->width = geo.in_width;
1017 pix->height = geo.in_height;
1018
1019 sh_vou_configure_geometry(vou_dev, vou_dev->pix_idx,
1020 geo.scale_idx_h, geo.scale_idx_v);
1021
1022 return 0;
1023 }
1024
sh_vou_isr(int irq,void * dev_id)1025 static irqreturn_t sh_vou_isr(int irq, void *dev_id)
1026 {
1027 struct sh_vou_device *vou_dev = dev_id;
1028 static unsigned long j;
1029 struct sh_vou_buffer *vb;
1030 static int cnt;
1031 u32 irq_status = sh_vou_reg_a_read(vou_dev, VOUIR), masked;
1032 u32 vou_status = sh_vou_reg_a_read(vou_dev, VOUSTR);
1033
1034 if (!(irq_status & 0x300)) {
1035 if (printk_timed_ratelimit(&j, 500))
1036 dev_warn(vou_dev->v4l2_dev.dev, "IRQ status 0x%x!\n",
1037 irq_status);
1038 return IRQ_NONE;
1039 }
1040
1041 spin_lock(&vou_dev->lock);
1042 if (!vou_dev->active || list_empty(&vou_dev->buf_list)) {
1043 if (printk_timed_ratelimit(&j, 500))
1044 dev_warn(vou_dev->v4l2_dev.dev,
1045 "IRQ without active buffer: %x!\n", irq_status);
1046 /* Just ack: buf_release will disable further interrupts */
1047 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x300);
1048 spin_unlock(&vou_dev->lock);
1049 return IRQ_HANDLED;
1050 }
1051
1052 masked = ~(0x300 & irq_status) & irq_status & 0x30304;
1053 dev_dbg(vou_dev->v4l2_dev.dev,
1054 "IRQ status 0x%x -> 0x%x, VOU status 0x%x, cnt %d\n",
1055 irq_status, masked, vou_status, cnt);
1056
1057 cnt++;
1058 /* side = vou_status & 0x10000; */
1059
1060 /* Clear only set interrupts */
1061 sh_vou_reg_a_write(vou_dev, VOUIR, masked);
1062
1063 vb = vou_dev->active;
1064 if (list_is_singular(&vb->list)) {
1065 /* Keep cycling while no next buffer is available */
1066 sh_vou_schedule_next(vou_dev, &vb->vb);
1067 spin_unlock(&vou_dev->lock);
1068 return IRQ_HANDLED;
1069 }
1070
1071 list_del(&vb->list);
1072
1073 vb->vb.vb2_buf.timestamp = ktime_get_ns();
1074 vb->vb.sequence = vou_dev->sequence++;
1075 vb->vb.field = V4L2_FIELD_INTERLACED;
1076 vb2_buffer_done(&vb->vb.vb2_buf, VB2_BUF_STATE_DONE);
1077
1078 vou_dev->active = list_entry(vou_dev->buf_list.next,
1079 struct sh_vou_buffer, list);
1080
1081 if (list_is_singular(&vou_dev->buf_list)) {
1082 /* Keep cycling while no next buffer is available */
1083 sh_vou_schedule_next(vou_dev, &vou_dev->active->vb);
1084 } else {
1085 struct sh_vou_buffer *new = list_entry(vou_dev->active->list.next,
1086 struct sh_vou_buffer, list);
1087 sh_vou_schedule_next(vou_dev, &new->vb);
1088 }
1089
1090 spin_unlock(&vou_dev->lock);
1091
1092 return IRQ_HANDLED;
1093 }
1094
sh_vou_hw_init(struct sh_vou_device * vou_dev)1095 static int sh_vou_hw_init(struct sh_vou_device *vou_dev)
1096 {
1097 struct sh_vou_pdata *pdata = vou_dev->pdata;
1098 u32 voucr = sh_vou_ntsc_mode(pdata->bus_fmt) << 29;
1099 int i = 100;
1100
1101 /* Disable all IRQs */
1102 sh_vou_reg_a_write(vou_dev, VOUIR, 0);
1103
1104 /* Reset VOU interfaces - registers unaffected */
1105 sh_vou_reg_a_write(vou_dev, VOUSRR, 0x101);
1106 while (--i && (sh_vou_reg_a_read(vou_dev, VOUSRR) & 0x101))
1107 udelay(1);
1108
1109 if (!i)
1110 return -ETIMEDOUT;
1111
1112 dev_dbg(vou_dev->v4l2_dev.dev, "Reset took %dus\n", 100 - i);
1113
1114 if (pdata->flags & SH_VOU_PCLK_FALLING)
1115 voucr |= 1 << 28;
1116 if (pdata->flags & SH_VOU_HSYNC_LOW)
1117 voucr |= 1 << 27;
1118 if (pdata->flags & SH_VOU_VSYNC_LOW)
1119 voucr |= 1 << 26;
1120 sh_vou_reg_ab_set(vou_dev, VOUCR, voucr, 0xfc000000);
1121
1122 /* Manual register side switching at first */
1123 sh_vou_reg_a_write(vou_dev, VOURCR, 4);
1124 /* Default - fixed HSYNC length, can be made configurable is required */
1125 sh_vou_reg_ab_write(vou_dev, VOUMSR, 0x800000);
1126
1127 sh_vou_set_fmt_vid_out(vou_dev, &vou_dev->pix);
1128
1129 return 0;
1130 }
1131
1132 /* File operations */
sh_vou_open(struct file * file)1133 static int sh_vou_open(struct file *file)
1134 {
1135 struct sh_vou_device *vou_dev = video_drvdata(file);
1136 int err;
1137
1138 if (mutex_lock_interruptible(&vou_dev->fop_lock))
1139 return -ERESTARTSYS;
1140
1141 err = v4l2_fh_open(file);
1142 if (err)
1143 goto done_open;
1144 if (v4l2_fh_is_singular_file(file) &&
1145 vou_dev->status == SH_VOU_INITIALISING) {
1146 /* First open */
1147 pm_runtime_get_sync(vou_dev->v4l2_dev.dev);
1148 err = sh_vou_hw_init(vou_dev);
1149 if (err < 0) {
1150 pm_runtime_put(vou_dev->v4l2_dev.dev);
1151 v4l2_fh_release(file);
1152 } else {
1153 vou_dev->status = SH_VOU_IDLE;
1154 }
1155 }
1156 done_open:
1157 mutex_unlock(&vou_dev->fop_lock);
1158 return err;
1159 }
1160
sh_vou_release(struct file * file)1161 static int sh_vou_release(struct file *file)
1162 {
1163 struct sh_vou_device *vou_dev = video_drvdata(file);
1164 bool is_last;
1165
1166 mutex_lock(&vou_dev->fop_lock);
1167 is_last = v4l2_fh_is_singular_file(file);
1168 _vb2_fop_release(file, NULL);
1169 if (is_last) {
1170 /* Last close */
1171 vou_dev->status = SH_VOU_INITIALISING;
1172 sh_vou_reg_a_set(vou_dev, VOUER, 0, 0x101);
1173 pm_runtime_put(vou_dev->v4l2_dev.dev);
1174 }
1175 mutex_unlock(&vou_dev->fop_lock);
1176 return 0;
1177 }
1178
1179 /* sh_vou display ioctl operations */
1180 static const struct v4l2_ioctl_ops sh_vou_ioctl_ops = {
1181 .vidioc_querycap = sh_vou_querycap,
1182 .vidioc_enum_fmt_vid_out = sh_vou_enum_fmt_vid_out,
1183 .vidioc_g_fmt_vid_out = sh_vou_g_fmt_vid_out,
1184 .vidioc_s_fmt_vid_out = sh_vou_s_fmt_vid_out,
1185 .vidioc_try_fmt_vid_out = sh_vou_try_fmt_vid_out,
1186 .vidioc_reqbufs = vb2_ioctl_reqbufs,
1187 .vidioc_create_bufs = vb2_ioctl_create_bufs,
1188 .vidioc_querybuf = vb2_ioctl_querybuf,
1189 .vidioc_qbuf = vb2_ioctl_qbuf,
1190 .vidioc_dqbuf = vb2_ioctl_dqbuf,
1191 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
1192 .vidioc_streamon = vb2_ioctl_streamon,
1193 .vidioc_streamoff = vb2_ioctl_streamoff,
1194 .vidioc_expbuf = vb2_ioctl_expbuf,
1195 .vidioc_g_output = sh_vou_g_output,
1196 .vidioc_s_output = sh_vou_s_output,
1197 .vidioc_enum_output = sh_vou_enum_output,
1198 .vidioc_s_std = sh_vou_s_std,
1199 .vidioc_g_std = sh_vou_g_std,
1200 .vidioc_g_selection = sh_vou_g_selection,
1201 .vidioc_s_selection = sh_vou_s_selection,
1202 .vidioc_log_status = sh_vou_log_status,
1203 };
1204
1205 static const struct v4l2_file_operations sh_vou_fops = {
1206 .owner = THIS_MODULE,
1207 .open = sh_vou_open,
1208 .release = sh_vou_release,
1209 .unlocked_ioctl = video_ioctl2,
1210 .mmap = vb2_fop_mmap,
1211 .poll = vb2_fop_poll,
1212 .write = vb2_fop_write,
1213 };
1214
1215 static const struct video_device sh_vou_video_template = {
1216 .name = "sh_vou",
1217 .fops = &sh_vou_fops,
1218 .ioctl_ops = &sh_vou_ioctl_ops,
1219 .tvnorms = V4L2_STD_525_60, /* PAL only supported in 8-bit non-bt656 mode */
1220 .vfl_dir = VFL_DIR_TX,
1221 };
1222
sh_vou_probe(struct platform_device * pdev)1223 static int sh_vou_probe(struct platform_device *pdev)
1224 {
1225 struct sh_vou_pdata *vou_pdata = pdev->dev.platform_data;
1226 struct v4l2_rect *rect;
1227 struct v4l2_pix_format *pix;
1228 struct i2c_adapter *i2c_adap;
1229 struct video_device *vdev;
1230 struct sh_vou_device *vou_dev;
1231 struct resource *reg_res;
1232 struct v4l2_subdev *subdev;
1233 struct vb2_queue *q;
1234 int irq, ret;
1235
1236 reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1237 irq = platform_get_irq(pdev, 0);
1238
1239 if (!vou_pdata || !reg_res || irq <= 0) {
1240 dev_err(&pdev->dev, "Insufficient VOU platform information.\n");
1241 return -ENODEV;
1242 }
1243
1244 vou_dev = devm_kzalloc(&pdev->dev, sizeof(*vou_dev), GFP_KERNEL);
1245 if (!vou_dev)
1246 return -ENOMEM;
1247
1248 INIT_LIST_HEAD(&vou_dev->buf_list);
1249 spin_lock_init(&vou_dev->lock);
1250 mutex_init(&vou_dev->fop_lock);
1251 vou_dev->pdata = vou_pdata;
1252 vou_dev->status = SH_VOU_INITIALISING;
1253 vou_dev->pix_idx = 1;
1254
1255 rect = &vou_dev->rect;
1256 pix = &vou_dev->pix;
1257
1258 /* Fill in defaults */
1259 vou_dev->std = V4L2_STD_NTSC_M;
1260 rect->left = 0;
1261 rect->top = 0;
1262 rect->width = VOU_MAX_IMAGE_WIDTH;
1263 rect->height = 480;
1264 pix->width = VOU_MAX_IMAGE_WIDTH;
1265 pix->height = 480;
1266 pix->pixelformat = V4L2_PIX_FMT_NV16;
1267 pix->field = V4L2_FIELD_INTERLACED;
1268 pix->bytesperline = VOU_MAX_IMAGE_WIDTH;
1269 pix->sizeimage = VOU_MAX_IMAGE_WIDTH * 2 * 480;
1270 pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
1271
1272 vou_dev->base = devm_ioremap_resource(&pdev->dev, reg_res);
1273 if (IS_ERR(vou_dev->base))
1274 return PTR_ERR(vou_dev->base);
1275
1276 ret = devm_request_irq(&pdev->dev, irq, sh_vou_isr, 0, "vou", vou_dev);
1277 if (ret < 0)
1278 return ret;
1279
1280 ret = v4l2_device_register(&pdev->dev, &vou_dev->v4l2_dev);
1281 if (ret < 0) {
1282 dev_err(&pdev->dev, "Error registering v4l2 device\n");
1283 return ret;
1284 }
1285
1286 vdev = &vou_dev->vdev;
1287 *vdev = sh_vou_video_template;
1288 if (vou_pdata->bus_fmt == SH_VOU_BUS_8BIT)
1289 vdev->tvnorms |= V4L2_STD_PAL;
1290 vdev->v4l2_dev = &vou_dev->v4l2_dev;
1291 vdev->release = video_device_release_empty;
1292 vdev->lock = &vou_dev->fop_lock;
1293
1294 video_set_drvdata(vdev, vou_dev);
1295
1296 /* Initialize the vb2 queue */
1297 q = &vou_dev->queue;
1298 q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1299 q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_WRITE;
1300 q->drv_priv = vou_dev;
1301 q->buf_struct_size = sizeof(struct sh_vou_buffer);
1302 q->ops = &sh_vou_qops;
1303 q->mem_ops = &vb2_dma_contig_memops;
1304 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1305 q->min_buffers_needed = 2;
1306 q->lock = &vou_dev->fop_lock;
1307 q->dev = &pdev->dev;
1308 ret = vb2_queue_init(q);
1309 if (ret)
1310 goto ei2cgadap;
1311
1312 vdev->queue = q;
1313 INIT_LIST_HEAD(&vou_dev->buf_list);
1314
1315 pm_runtime_enable(&pdev->dev);
1316 pm_runtime_resume(&pdev->dev);
1317
1318 i2c_adap = i2c_get_adapter(vou_pdata->i2c_adap);
1319 if (!i2c_adap) {
1320 ret = -ENODEV;
1321 goto ei2cgadap;
1322 }
1323
1324 ret = sh_vou_hw_init(vou_dev);
1325 if (ret < 0)
1326 goto ereset;
1327
1328 subdev = v4l2_i2c_new_subdev_board(&vou_dev->v4l2_dev, i2c_adap,
1329 vou_pdata->board_info, NULL);
1330 if (!subdev) {
1331 ret = -ENOMEM;
1332 goto ei2cnd;
1333 }
1334
1335 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1336 if (ret < 0)
1337 goto evregdev;
1338
1339 return 0;
1340
1341 evregdev:
1342 ei2cnd:
1343 ereset:
1344 i2c_put_adapter(i2c_adap);
1345 ei2cgadap:
1346 pm_runtime_disable(&pdev->dev);
1347 v4l2_device_unregister(&vou_dev->v4l2_dev);
1348 return ret;
1349 }
1350
sh_vou_remove(struct platform_device * pdev)1351 static int sh_vou_remove(struct platform_device *pdev)
1352 {
1353 struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1354 struct sh_vou_device *vou_dev = container_of(v4l2_dev,
1355 struct sh_vou_device, v4l2_dev);
1356 struct v4l2_subdev *sd = list_entry(v4l2_dev->subdevs.next,
1357 struct v4l2_subdev, list);
1358 struct i2c_client *client = v4l2_get_subdevdata(sd);
1359
1360 pm_runtime_disable(&pdev->dev);
1361 video_unregister_device(&vou_dev->vdev);
1362 i2c_put_adapter(client->adapter);
1363 v4l2_device_unregister(&vou_dev->v4l2_dev);
1364 return 0;
1365 }
1366
1367 static struct platform_driver __refdata sh_vou = {
1368 .remove = sh_vou_remove,
1369 .driver = {
1370 .name = "sh-vou",
1371 },
1372 };
1373
1374 module_platform_driver_probe(sh_vou, sh_vou_probe);
1375
1376 MODULE_DESCRIPTION("SuperH VOU driver");
1377 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1378 MODULE_LICENSE("GPL v2");
1379 MODULE_VERSION("0.1.0");
1380 MODULE_ALIAS("platform:sh-vou");
1381
