1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * sh-mobile VEU mem2mem driver
4 *
5 * Copyright (C) 2012 Renesas Electronics Corporation
6 * Author: Guennadi Liakhovetski, <g.liakhovetski@gmx.de>
7 * Copyright (C) 2008 Magnus Damm
8 */
9
10 #include <linux/err.h>
11 #include <linux/fs.h>
12 #include <linux/kernel.h>
13 #include <linux/module.h>
14 #include <linux/interrupt.h>
15 #include <linux/io.h>
16 #include <linux/platform_device.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/slab.h>
19 #include <linux/types.h>
20 #include <linux/videodev2.h>
21
22 #include <media/v4l2-dev.h>
23 #include <media/v4l2-device.h>
24 #include <media/v4l2-ioctl.h>
25 #include <media/v4l2-mem2mem.h>
26 #include <media/v4l2-image-sizes.h>
27 #include <media/videobuf2-dma-contig.h>
28
29 #define VEU_STR 0x00 /* start register */
30 #define VEU_SWR 0x10 /* src: line length */
31 #define VEU_SSR 0x14 /* src: image size */
32 #define VEU_SAYR 0x18 /* src: y/rgb plane address */
33 #define VEU_SACR 0x1c /* src: c plane address */
34 #define VEU_BSSR 0x20 /* bundle mode register */
35 #define VEU_EDWR 0x30 /* dst: line length */
36 #define VEU_DAYR 0x34 /* dst: y/rgb plane address */
37 #define VEU_DACR 0x38 /* dst: c plane address */
38 #define VEU_TRCR 0x50 /* transform control */
39 #define VEU_RFCR 0x54 /* resize scale */
40 #define VEU_RFSR 0x58 /* resize clip */
41 #define VEU_ENHR 0x5c /* enhance */
42 #define VEU_FMCR 0x70 /* filter mode */
43 #define VEU_VTCR 0x74 /* lowpass vertical */
44 #define VEU_HTCR 0x78 /* lowpass horizontal */
45 #define VEU_APCR 0x80 /* color match */
46 #define VEU_ECCR 0x84 /* color replace */
47 #define VEU_AFXR 0x90 /* fixed mode */
48 #define VEU_SWPR 0x94 /* swap */
49 #define VEU_EIER 0xa0 /* interrupt mask */
50 #define VEU_EVTR 0xa4 /* interrupt event */
51 #define VEU_STAR 0xb0 /* status */
52 #define VEU_BSRR 0xb4 /* reset */
53
54 #define VEU_MCR00 0x200 /* color conversion matrix coefficient 00 */
55 #define VEU_MCR01 0x204 /* color conversion matrix coefficient 01 */
56 #define VEU_MCR02 0x208 /* color conversion matrix coefficient 02 */
57 #define VEU_MCR10 0x20c /* color conversion matrix coefficient 10 */
58 #define VEU_MCR11 0x210 /* color conversion matrix coefficient 11 */
59 #define VEU_MCR12 0x214 /* color conversion matrix coefficient 12 */
60 #define VEU_MCR20 0x218 /* color conversion matrix coefficient 20 */
61 #define VEU_MCR21 0x21c /* color conversion matrix coefficient 21 */
62 #define VEU_MCR22 0x220 /* color conversion matrix coefficient 22 */
63 #define VEU_COFFR 0x224 /* color conversion offset */
64 #define VEU_CBR 0x228 /* color conversion clip */
65
66 /*
67 * 4092x4092 max size is the normal case. In some cases it can be reduced to
68 * 2048x2048, in other cases it can be 4092x8188 or even 8188x8188.
69 */
70 #define MAX_W 4092
71 #define MAX_H 4092
72 #define MIN_W 8
73 #define MIN_H 8
74 #define ALIGN_W 4
75
76 /* 3 buffers of 2048 x 1536 - 3 megapixels @ 16bpp */
77 #define VIDEO_MEM_LIMIT ALIGN(2048 * 1536 * 2 * 3, 1024 * 1024)
78
79 #define MEM2MEM_DEF_TRANSLEN 1
80
81 struct sh_veu_dev;
82
83 struct sh_veu_file {
84 struct v4l2_fh fh;
85 struct sh_veu_dev *veu_dev;
86 bool cfg_needed;
87 };
88
89 struct sh_veu_format {
90 u32 fourcc;
91 unsigned int depth;
92 unsigned int ydepth;
93 };
94
95 /* video data format */
96 struct sh_veu_vfmt {
97 /* Replace with v4l2_rect */
98 struct v4l2_rect frame;
99 unsigned int bytesperline;
100 unsigned int offset_y;
101 unsigned int offset_c;
102 const struct sh_veu_format *fmt;
103 };
104
105 struct sh_veu_dev {
106 struct v4l2_device v4l2_dev;
107 struct video_device vdev;
108 struct v4l2_m2m_dev *m2m_dev;
109 struct device *dev;
110 struct v4l2_m2m_ctx *m2m_ctx;
111 struct sh_veu_vfmt vfmt_out;
112 struct sh_veu_vfmt vfmt_in;
113 /* Only single user per direction so far */
114 struct sh_veu_file *capture;
115 struct sh_veu_file *output;
116 struct mutex fop_lock;
117 void __iomem *base;
118 spinlock_t lock;
119 bool is_2h;
120 unsigned int xaction;
121 bool aborting;
122 };
123
124 enum sh_veu_fmt_idx {
125 SH_VEU_FMT_NV12,
126 SH_VEU_FMT_NV16,
127 SH_VEU_FMT_NV24,
128 SH_VEU_FMT_RGB332,
129 SH_VEU_FMT_RGB444,
130 SH_VEU_FMT_RGB565,
131 SH_VEU_FMT_RGB666,
132 SH_VEU_FMT_RGB24,
133 };
134
135 #define DEFAULT_IN_WIDTH VGA_WIDTH
136 #define DEFAULT_IN_HEIGHT VGA_HEIGHT
137 #define DEFAULT_IN_FMTIDX SH_VEU_FMT_NV12
138 #define DEFAULT_OUT_WIDTH VGA_WIDTH
139 #define DEFAULT_OUT_HEIGHT VGA_HEIGHT
140 #define DEFAULT_OUT_FMTIDX SH_VEU_FMT_RGB565
141
142 /*
143 * Alignment: Y-plane should be 4-byte aligned for NV12 and NV16, and 8-byte
144 * aligned for NV24.
145 */
146 static const struct sh_veu_format sh_veu_fmt[] = {
147 [SH_VEU_FMT_NV12] = { .ydepth = 8, .depth = 12, .fourcc = V4L2_PIX_FMT_NV12 },
148 [SH_VEU_FMT_NV16] = { .ydepth = 8, .depth = 16, .fourcc = V4L2_PIX_FMT_NV16 },
149 [SH_VEU_FMT_NV24] = { .ydepth = 8, .depth = 24, .fourcc = V4L2_PIX_FMT_NV24 },
150 [SH_VEU_FMT_RGB332] = { .ydepth = 8, .depth = 8, .fourcc = V4L2_PIX_FMT_RGB332 },
151 [SH_VEU_FMT_RGB444] = { .ydepth = 16, .depth = 16, .fourcc = V4L2_PIX_FMT_RGB444 },
152 [SH_VEU_FMT_RGB565] = { .ydepth = 16, .depth = 16, .fourcc = V4L2_PIX_FMT_RGB565 },
153 [SH_VEU_FMT_RGB666] = { .ydepth = 32, .depth = 32, .fourcc = V4L2_PIX_FMT_BGR666 },
154 [SH_VEU_FMT_RGB24] = { .ydepth = 24, .depth = 24, .fourcc = V4L2_PIX_FMT_RGB24 },
155 };
156
157 #define DEFAULT_IN_VFMT (struct sh_veu_vfmt){ \
158 .frame = { \
159 .width = VGA_WIDTH, \
160 .height = VGA_HEIGHT, \
161 }, \
162 .bytesperline = (VGA_WIDTH * sh_veu_fmt[DEFAULT_IN_FMTIDX].ydepth) >> 3, \
163 .fmt = &sh_veu_fmt[DEFAULT_IN_FMTIDX], \
164 }
165
166 #define DEFAULT_OUT_VFMT (struct sh_veu_vfmt){ \
167 .frame = { \
168 .width = VGA_WIDTH, \
169 .height = VGA_HEIGHT, \
170 }, \
171 .bytesperline = (VGA_WIDTH * sh_veu_fmt[DEFAULT_OUT_FMTIDX].ydepth) >> 3, \
172 .fmt = &sh_veu_fmt[DEFAULT_OUT_FMTIDX], \
173 }
174
175 /*
176 * TODO: add support for further output formats:
177 * SH_VEU_FMT_NV12,
178 * SH_VEU_FMT_NV16,
179 * SH_VEU_FMT_NV24,
180 * SH_VEU_FMT_RGB332,
181 * SH_VEU_FMT_RGB444,
182 * SH_VEU_FMT_RGB666,
183 * SH_VEU_FMT_RGB24,
184 */
185
186 static const int sh_veu_fmt_out[] = {
187 SH_VEU_FMT_RGB565,
188 };
189
190 /*
191 * TODO: add support for further input formats:
192 * SH_VEU_FMT_NV16,
193 * SH_VEU_FMT_NV24,
194 * SH_VEU_FMT_RGB565,
195 * SH_VEU_FMT_RGB666,
196 * SH_VEU_FMT_RGB24,
197 */
198 static const int sh_veu_fmt_in[] = {
199 SH_VEU_FMT_NV12,
200 };
201
sh_veu_4cc2cspace(u32 fourcc)202 static enum v4l2_colorspace sh_veu_4cc2cspace(u32 fourcc)
203 {
204 switch (fourcc) {
205 default:
206 BUG();
207 case V4L2_PIX_FMT_NV12:
208 case V4L2_PIX_FMT_NV16:
209 case V4L2_PIX_FMT_NV24:
210 return V4L2_COLORSPACE_SMPTE170M;
211 case V4L2_PIX_FMT_RGB332:
212 case V4L2_PIX_FMT_RGB444:
213 case V4L2_PIX_FMT_RGB565:
214 case V4L2_PIX_FMT_BGR666:
215 case V4L2_PIX_FMT_RGB24:
216 return V4L2_COLORSPACE_SRGB;
217 }
218 }
219
sh_veu_reg_read(struct sh_veu_dev * veu,unsigned int reg)220 static u32 sh_veu_reg_read(struct sh_veu_dev *veu, unsigned int reg)
221 {
222 return ioread32(veu->base + reg);
223 }
224
sh_veu_reg_write(struct sh_veu_dev * veu,unsigned int reg,u32 value)225 static void sh_veu_reg_write(struct sh_veu_dev *veu, unsigned int reg,
226 u32 value)
227 {
228 iowrite32(value, veu->base + reg);
229 }
230
231 /* ========== mem2mem callbacks ========== */
232
sh_veu_job_abort(void * priv)233 static void sh_veu_job_abort(void *priv)
234 {
235 struct sh_veu_dev *veu = priv;
236
237 /* Will cancel the transaction in the next interrupt handler */
238 veu->aborting = true;
239 }
240
sh_veu_process(struct sh_veu_dev * veu,struct vb2_buffer * src_buf,struct vb2_buffer * dst_buf)241 static void sh_veu_process(struct sh_veu_dev *veu,
242 struct vb2_buffer *src_buf,
243 struct vb2_buffer *dst_buf)
244 {
245 dma_addr_t addr = vb2_dma_contig_plane_dma_addr(dst_buf, 0);
246
247 sh_veu_reg_write(veu, VEU_DAYR, addr + veu->vfmt_out.offset_y);
248 sh_veu_reg_write(veu, VEU_DACR, veu->vfmt_out.offset_c ?
249 addr + veu->vfmt_out.offset_c : 0);
250 dev_dbg(veu->dev, "%s(): dst base %lx, y: %x, c: %x\n", __func__,
251 (unsigned long)addr,
252 veu->vfmt_out.offset_y, veu->vfmt_out.offset_c);
253
254 addr = vb2_dma_contig_plane_dma_addr(src_buf, 0);
255 sh_veu_reg_write(veu, VEU_SAYR, addr + veu->vfmt_in.offset_y);
256 sh_veu_reg_write(veu, VEU_SACR, veu->vfmt_in.offset_c ?
257 addr + veu->vfmt_in.offset_c : 0);
258 dev_dbg(veu->dev, "%s(): src base %lx, y: %x, c: %x\n", __func__,
259 (unsigned long)addr,
260 veu->vfmt_in.offset_y, veu->vfmt_in.offset_c);
261
262 sh_veu_reg_write(veu, VEU_STR, 1);
263
264 sh_veu_reg_write(veu, VEU_EIER, 1); /* enable interrupt in VEU */
265 }
266
267 /*
268 * sh_veu_device_run() - prepares and starts the device
269 *
270 * This will be called by the framework when it decides to schedule a particular
271 * instance.
272 */
sh_veu_device_run(void * priv)273 static void sh_veu_device_run(void *priv)
274 {
275 struct sh_veu_dev *veu = priv;
276 struct vb2_v4l2_buffer *src_buf, *dst_buf;
277
278 src_buf = v4l2_m2m_next_src_buf(veu->m2m_ctx);
279 dst_buf = v4l2_m2m_next_dst_buf(veu->m2m_ctx);
280
281 if (src_buf && dst_buf)
282 sh_veu_process(veu, &src_buf->vb2_buf, &dst_buf->vb2_buf);
283 }
284
285 /* ========== video ioctls ========== */
286
sh_veu_is_streamer(struct sh_veu_dev * veu,struct sh_veu_file * veu_file,enum v4l2_buf_type type)287 static bool sh_veu_is_streamer(struct sh_veu_dev *veu, struct sh_veu_file *veu_file,
288 enum v4l2_buf_type type)
289 {
290 return (type == V4L2_BUF_TYPE_VIDEO_CAPTURE &&
291 veu_file == veu->capture) ||
292 (type == V4L2_BUF_TYPE_VIDEO_OUTPUT &&
293 veu_file == veu->output);
294 }
295
296 static int sh_veu_queue_init(void *priv, struct vb2_queue *src_vq,
297 struct vb2_queue *dst_vq);
298
299 /*
300 * It is not unusual to have video nodes open()ed multiple times. While some
301 * V4L2 operations are non-intrusive, like querying formats and various
302 * parameters, others, like setting formats, starting and stopping streaming,
303 * queuing and dequeuing buffers, directly affect hardware configuration and /
304 * or execution. This function verifies availability of the requested interface
305 * and, if available, reserves it for the requesting user.
306 */
sh_veu_stream_init(struct sh_veu_dev * veu,struct sh_veu_file * veu_file,enum v4l2_buf_type type)307 static int sh_veu_stream_init(struct sh_veu_dev *veu, struct sh_veu_file *veu_file,
308 enum v4l2_buf_type type)
309 {
310 struct sh_veu_file **stream;
311
312 switch (type) {
313 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
314 stream = &veu->capture;
315 break;
316 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
317 stream = &veu->output;
318 break;
319 default:
320 return -EINVAL;
321 }
322
323 if (*stream == veu_file)
324 return 0;
325
326 if (*stream)
327 return -EBUSY;
328
329 *stream = veu_file;
330
331 return 0;
332 }
333
sh_veu_context_init(struct sh_veu_dev * veu)334 static int sh_veu_context_init(struct sh_veu_dev *veu)
335 {
336 if (veu->m2m_ctx)
337 return 0;
338
339 veu->m2m_ctx = v4l2_m2m_ctx_init(veu->m2m_dev, veu,
340 sh_veu_queue_init);
341
342 return PTR_ERR_OR_ZERO(veu->m2m_ctx);
343 }
344
sh_veu_querycap(struct file * file,void * priv,struct v4l2_capability * cap)345 static int sh_veu_querycap(struct file *file, void *priv,
346 struct v4l2_capability *cap)
347 {
348 strscpy(cap->driver, "sh-veu", sizeof(cap->driver));
349 strscpy(cap->card, "sh-mobile VEU", sizeof(cap->card));
350 strscpy(cap->bus_info, "platform:sh-veu", sizeof(cap->bus_info));
351 return 0;
352 }
353
sh_veu_enum_fmt(struct v4l2_fmtdesc * f,const int * fmt,int fmt_num)354 static int sh_veu_enum_fmt(struct v4l2_fmtdesc *f, const int *fmt, int fmt_num)
355 {
356 if (f->index >= fmt_num)
357 return -EINVAL;
358
359 f->pixelformat = sh_veu_fmt[fmt[f->index]].fourcc;
360 return 0;
361 }
362
sh_veu_enum_fmt_vid_cap(struct file * file,void * priv,struct v4l2_fmtdesc * f)363 static int sh_veu_enum_fmt_vid_cap(struct file *file, void *priv,
364 struct v4l2_fmtdesc *f)
365 {
366 return sh_veu_enum_fmt(f, sh_veu_fmt_out, ARRAY_SIZE(sh_veu_fmt_out));
367 }
368
sh_veu_enum_fmt_vid_out(struct file * file,void * priv,struct v4l2_fmtdesc * f)369 static int sh_veu_enum_fmt_vid_out(struct file *file, void *priv,
370 struct v4l2_fmtdesc *f)
371 {
372 return sh_veu_enum_fmt(f, sh_veu_fmt_in, ARRAY_SIZE(sh_veu_fmt_in));
373 }
374
sh_veu_get_vfmt(struct sh_veu_dev * veu,enum v4l2_buf_type type)375 static struct sh_veu_vfmt *sh_veu_get_vfmt(struct sh_veu_dev *veu,
376 enum v4l2_buf_type type)
377 {
378 switch (type) {
379 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
380 return &veu->vfmt_out;
381 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
382 return &veu->vfmt_in;
383 default:
384 return NULL;
385 }
386 }
387
sh_veu_g_fmt(struct sh_veu_file * veu_file,struct v4l2_format * f)388 static int sh_veu_g_fmt(struct sh_veu_file *veu_file, struct v4l2_format *f)
389 {
390 struct v4l2_pix_format *pix = &f->fmt.pix;
391 struct sh_veu_dev *veu = veu_file->veu_dev;
392 struct sh_veu_vfmt *vfmt;
393
394 vfmt = sh_veu_get_vfmt(veu, f->type);
395
396 pix->width = vfmt->frame.width;
397 pix->height = vfmt->frame.height;
398 pix->field = V4L2_FIELD_NONE;
399 pix->pixelformat = vfmt->fmt->fourcc;
400 pix->colorspace = sh_veu_4cc2cspace(pix->pixelformat);
401 pix->bytesperline = vfmt->bytesperline;
402 pix->sizeimage = vfmt->bytesperline * pix->height *
403 vfmt->fmt->depth / vfmt->fmt->ydepth;
404 dev_dbg(veu->dev, "%s(): type: %d, size %u @ %ux%u, fmt %x\n", __func__,
405 f->type, pix->sizeimage, pix->width, pix->height, pix->pixelformat);
406
407 return 0;
408 }
409
sh_veu_g_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * f)410 static int sh_veu_g_fmt_vid_out(struct file *file, void *priv,
411 struct v4l2_format *f)
412 {
413 return sh_veu_g_fmt(priv, f);
414 }
415
sh_veu_g_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)416 static int sh_veu_g_fmt_vid_cap(struct file *file, void *priv,
417 struct v4l2_format *f)
418 {
419 return sh_veu_g_fmt(priv, f);
420 }
421
sh_veu_try_fmt(struct v4l2_format * f,const struct sh_veu_format * fmt)422 static int sh_veu_try_fmt(struct v4l2_format *f, const struct sh_veu_format *fmt)
423 {
424 struct v4l2_pix_format *pix = &f->fmt.pix;
425 unsigned int y_bytes_used;
426
427 /*
428 * V4L2 specification suggests, that the driver should correct the
429 * format struct if any of the dimensions is unsupported
430 */
431 switch (pix->field) {
432 default:
433 case V4L2_FIELD_ANY:
434 pix->field = V4L2_FIELD_NONE;
435 /* fall through: continue handling V4L2_FIELD_NONE */
436 case V4L2_FIELD_NONE:
437 break;
438 }
439
440 v4l_bound_align_image(&pix->width, MIN_W, MAX_W, ALIGN_W,
441 &pix->height, MIN_H, MAX_H, 0, 0);
442
443 y_bytes_used = (pix->width * fmt->ydepth) >> 3;
444
445 if (pix->bytesperline < y_bytes_used)
446 pix->bytesperline = y_bytes_used;
447 pix->sizeimage = pix->height * pix->bytesperline * fmt->depth / fmt->ydepth;
448
449 pix->pixelformat = fmt->fourcc;
450 pix->colorspace = sh_veu_4cc2cspace(pix->pixelformat);
451
452 pr_debug("%s(): type: %d, size %u\n", __func__, f->type, pix->sizeimage);
453
454 return 0;
455 }
456
sh_veu_find_fmt(const struct v4l2_format * f)457 static const struct sh_veu_format *sh_veu_find_fmt(const struct v4l2_format *f)
458 {
459 const int *fmt;
460 int i, n, dflt;
461
462 pr_debug("%s(%d;%d)\n", __func__, f->type, f->fmt.pix.field);
463
464 switch (f->type) {
465 case V4L2_BUF_TYPE_VIDEO_CAPTURE:
466 fmt = sh_veu_fmt_out;
467 n = ARRAY_SIZE(sh_veu_fmt_out);
468 dflt = DEFAULT_OUT_FMTIDX;
469 break;
470 case V4L2_BUF_TYPE_VIDEO_OUTPUT:
471 default:
472 fmt = sh_veu_fmt_in;
473 n = ARRAY_SIZE(sh_veu_fmt_in);
474 dflt = DEFAULT_IN_FMTIDX;
475 break;
476 }
477
478 for (i = 0; i < n; i++)
479 if (sh_veu_fmt[fmt[i]].fourcc == f->fmt.pix.pixelformat)
480 return &sh_veu_fmt[fmt[i]];
481
482 return &sh_veu_fmt[dflt];
483 }
484
sh_veu_try_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)485 static int sh_veu_try_fmt_vid_cap(struct file *file, void *priv,
486 struct v4l2_format *f)
487 {
488 const struct sh_veu_format *fmt;
489
490 fmt = sh_veu_find_fmt(f);
491
492 return sh_veu_try_fmt(f, fmt);
493 }
494
sh_veu_try_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * f)495 static int sh_veu_try_fmt_vid_out(struct file *file, void *priv,
496 struct v4l2_format *f)
497 {
498 const struct sh_veu_format *fmt;
499
500 fmt = sh_veu_find_fmt(f);
501
502 return sh_veu_try_fmt(f, fmt);
503 }
504
sh_veu_colour_offset(struct sh_veu_dev * veu,struct sh_veu_vfmt * vfmt)505 static void sh_veu_colour_offset(struct sh_veu_dev *veu, struct sh_veu_vfmt *vfmt)
506 {
507 /* dst_left and dst_top validity will be verified in CROP / COMPOSE */
508 unsigned int left = vfmt->frame.left & ~0x03;
509 unsigned int top = vfmt->frame.top;
510 dma_addr_t offset = (dma_addr_t)top * veu->vfmt_out.bytesperline +
511 (((dma_addr_t)left * veu->vfmt_out.fmt->depth) >> 3);
512 unsigned int y_line;
513
514 vfmt->offset_y = offset;
515
516 switch (vfmt->fmt->fourcc) {
517 case V4L2_PIX_FMT_NV12:
518 case V4L2_PIX_FMT_NV16:
519 case V4L2_PIX_FMT_NV24:
520 y_line = ALIGN(vfmt->frame.width, 16);
521 vfmt->offset_c = offset + y_line * vfmt->frame.height;
522 break;
523 case V4L2_PIX_FMT_RGB332:
524 case V4L2_PIX_FMT_RGB444:
525 case V4L2_PIX_FMT_RGB565:
526 case V4L2_PIX_FMT_BGR666:
527 case V4L2_PIX_FMT_RGB24:
528 vfmt->offset_c = 0;
529 break;
530 default:
531 BUG();
532 }
533 }
534
sh_veu_s_fmt(struct sh_veu_file * veu_file,struct v4l2_format * f)535 static int sh_veu_s_fmt(struct sh_veu_file *veu_file, struct v4l2_format *f)
536 {
537 struct v4l2_pix_format *pix = &f->fmt.pix;
538 struct sh_veu_dev *veu = veu_file->veu_dev;
539 struct sh_veu_vfmt *vfmt;
540 struct vb2_queue *vq;
541 int ret = sh_veu_context_init(veu);
542 if (ret < 0)
543 return ret;
544
545 vq = v4l2_m2m_get_vq(veu->m2m_ctx, f->type);
546 if (!vq)
547 return -EINVAL;
548
549 if (vb2_is_busy(vq)) {
550 v4l2_err(&veu_file->veu_dev->v4l2_dev, "%s queue busy\n", __func__);
551 return -EBUSY;
552 }
553
554 vfmt = sh_veu_get_vfmt(veu, f->type);
555 /* called after try_fmt(), hence vfmt != NULL. Implicit BUG_ON() below */
556
557 vfmt->fmt = sh_veu_find_fmt(f);
558 /* vfmt->fmt != NULL following the same argument as above */
559 vfmt->frame.width = pix->width;
560 vfmt->frame.height = pix->height;
561 vfmt->bytesperline = pix->bytesperline;
562
563 sh_veu_colour_offset(veu, vfmt);
564
565 /*
566 * We could also verify and require configuration only if any parameters
567 * actually have changed, but it is unlikely, that the user requests the
568 * same configuration several times without closing the device.
569 */
570 veu_file->cfg_needed = true;
571
572 dev_dbg(veu->dev,
573 "Setting format for type %d, wxh: %dx%d, fmt: %x\n",
574 f->type, pix->width, pix->height, vfmt->fmt->fourcc);
575
576 return 0;
577 }
578
sh_veu_s_fmt_vid_cap(struct file * file,void * priv,struct v4l2_format * f)579 static int sh_veu_s_fmt_vid_cap(struct file *file, void *priv,
580 struct v4l2_format *f)
581 {
582 int ret = sh_veu_try_fmt_vid_cap(file, priv, f);
583 if (ret)
584 return ret;
585
586 return sh_veu_s_fmt(priv, f);
587 }
588
sh_veu_s_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * f)589 static int sh_veu_s_fmt_vid_out(struct file *file, void *priv,
590 struct v4l2_format *f)
591 {
592 int ret = sh_veu_try_fmt_vid_out(file, priv, f);
593 if (ret)
594 return ret;
595
596 return sh_veu_s_fmt(priv, f);
597 }
598
sh_veu_reqbufs(struct file * file,void * priv,struct v4l2_requestbuffers * reqbufs)599 static int sh_veu_reqbufs(struct file *file, void *priv,
600 struct v4l2_requestbuffers *reqbufs)
601 {
602 struct sh_veu_file *veu_file = priv;
603 struct sh_veu_dev *veu = veu_file->veu_dev;
604 int ret = sh_veu_context_init(veu);
605 if (ret < 0)
606 return ret;
607
608 ret = sh_veu_stream_init(veu, veu_file, reqbufs->type);
609 if (ret < 0)
610 return ret;
611
612 return v4l2_m2m_reqbufs(file, veu->m2m_ctx, reqbufs);
613 }
614
sh_veu_querybuf(struct file * file,void * priv,struct v4l2_buffer * buf)615 static int sh_veu_querybuf(struct file *file, void *priv,
616 struct v4l2_buffer *buf)
617 {
618 struct sh_veu_file *veu_file = priv;
619
620 if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, buf->type))
621 return -EBUSY;
622
623 return v4l2_m2m_querybuf(file, veu_file->veu_dev->m2m_ctx, buf);
624 }
625
sh_veu_qbuf(struct file * file,void * priv,struct v4l2_buffer * buf)626 static int sh_veu_qbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
627 {
628 struct sh_veu_file *veu_file = priv;
629
630 dev_dbg(veu_file->veu_dev->dev, "%s(%d)\n", __func__, buf->type);
631 if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, buf->type))
632 return -EBUSY;
633
634 return v4l2_m2m_qbuf(file, veu_file->veu_dev->m2m_ctx, buf);
635 }
636
sh_veu_dqbuf(struct file * file,void * priv,struct v4l2_buffer * buf)637 static int sh_veu_dqbuf(struct file *file, void *priv, struct v4l2_buffer *buf)
638 {
639 struct sh_veu_file *veu_file = priv;
640
641 dev_dbg(veu_file->veu_dev->dev, "%s(%d)\n", __func__, buf->type);
642 if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, buf->type))
643 return -EBUSY;
644
645 return v4l2_m2m_dqbuf(file, veu_file->veu_dev->m2m_ctx, buf);
646 }
647
sh_veu_calc_scale(struct sh_veu_dev * veu,int size_in,int size_out,int crop_out,u32 * mant,u32 * frac,u32 * rep)648 static void sh_veu_calc_scale(struct sh_veu_dev *veu,
649 int size_in, int size_out, int crop_out,
650 u32 *mant, u32 *frac, u32 *rep)
651 {
652 u32 fixpoint;
653
654 /* calculate FRAC and MANT */
655 *rep = *mant = *frac = 0;
656
657 if (size_in == size_out) {
658 if (crop_out != size_out)
659 *mant = 1; /* needed for cropping */
660 return;
661 }
662
663 /* VEU2H special upscale */
664 if (veu->is_2h && size_out > size_in) {
665 u32 fixpoint = (4096 * size_in) / size_out;
666 *mant = fixpoint / 4096;
667 *frac = (fixpoint - (*mant * 4096)) & ~0x07;
668
669 switch (*frac) {
670 case 0x800:
671 *rep = 1;
672 break;
673 case 0x400:
674 *rep = 3;
675 break;
676 case 0x200:
677 *rep = 7;
678 break;
679 }
680 if (*rep)
681 return;
682 }
683
684 fixpoint = (4096 * (size_in - 1)) / (size_out + 1);
685 *mant = fixpoint / 4096;
686 *frac = fixpoint - (*mant * 4096);
687
688 if (*frac & 0x07) {
689 /*
690 * FIXME: do we really have to round down twice in the
691 * up-scaling case?
692 */
693 *frac &= ~0x07;
694 if (size_out > size_in)
695 *frac -= 8; /* round down if scaling up */
696 else
697 *frac += 8; /* round up if scaling down */
698 }
699 }
700
sh_veu_scale_v(struct sh_veu_dev * veu,int size_in,int size_out,int crop_out)701 static unsigned long sh_veu_scale_v(struct sh_veu_dev *veu,
702 int size_in, int size_out, int crop_out)
703 {
704 u32 mant, frac, value, rep;
705
706 sh_veu_calc_scale(veu, size_in, size_out, crop_out, &mant, &frac, &rep);
707
708 /* set scale */
709 value = (sh_veu_reg_read(veu, VEU_RFCR) & ~0xffff0000) |
710 (((mant << 12) | frac) << 16);
711
712 sh_veu_reg_write(veu, VEU_RFCR, value);
713
714 /* set clip */
715 value = (sh_veu_reg_read(veu, VEU_RFSR) & ~0xffff0000) |
716 (((rep << 12) | crop_out) << 16);
717
718 sh_veu_reg_write(veu, VEU_RFSR, value);
719
720 return ALIGN((size_in * crop_out) / size_out, 4);
721 }
722
sh_veu_scale_h(struct sh_veu_dev * veu,int size_in,int size_out,int crop_out)723 static unsigned long sh_veu_scale_h(struct sh_veu_dev *veu,
724 int size_in, int size_out, int crop_out)
725 {
726 u32 mant, frac, value, rep;
727
728 sh_veu_calc_scale(veu, size_in, size_out, crop_out, &mant, &frac, &rep);
729
730 /* set scale */
731 value = (sh_veu_reg_read(veu, VEU_RFCR) & ~0xffff) |
732 (mant << 12) | frac;
733
734 sh_veu_reg_write(veu, VEU_RFCR, value);
735
736 /* set clip */
737 value = (sh_veu_reg_read(veu, VEU_RFSR) & ~0xffff) |
738 (rep << 12) | crop_out;
739
740 sh_veu_reg_write(veu, VEU_RFSR, value);
741
742 return ALIGN((size_in * crop_out) / size_out, 4);
743 }
744
sh_veu_configure(struct sh_veu_dev * veu)745 static void sh_veu_configure(struct sh_veu_dev *veu)
746 {
747 u32 src_width, src_stride, src_height;
748 u32 dst_width, dst_stride, dst_height;
749 u32 real_w, real_h;
750
751 /* reset VEU */
752 sh_veu_reg_write(veu, VEU_BSRR, 0x100);
753
754 src_width = veu->vfmt_in.frame.width;
755 src_height = veu->vfmt_in.frame.height;
756 src_stride = ALIGN(veu->vfmt_in.frame.width, 16);
757
758 dst_width = real_w = veu->vfmt_out.frame.width;
759 dst_height = real_h = veu->vfmt_out.frame.height;
760 /* Datasheet is unclear - whether it's always number of bytes or not */
761 dst_stride = veu->vfmt_out.bytesperline;
762
763 /*
764 * So far real_w == dst_width && real_h == dst_height, but it wasn't
765 * necessarily the case in the original vidix driver, so, it may change
766 * here in the future too.
767 */
768 src_width = sh_veu_scale_h(veu, src_width, real_w, dst_width);
769 src_height = sh_veu_scale_v(veu, src_height, real_h, dst_height);
770
771 sh_veu_reg_write(veu, VEU_SWR, src_stride);
772 sh_veu_reg_write(veu, VEU_SSR, src_width | (src_height << 16));
773 sh_veu_reg_write(veu, VEU_BSSR, 0); /* not using bundle mode */
774
775 sh_veu_reg_write(veu, VEU_EDWR, dst_stride);
776 sh_veu_reg_write(veu, VEU_DACR, 0); /* unused for RGB */
777
778 sh_veu_reg_write(veu, VEU_SWPR, 0x67);
779 sh_veu_reg_write(veu, VEU_TRCR, (6 << 16) | (0 << 14) | 2 | 4);
780
781 if (veu->is_2h) {
782 sh_veu_reg_write(veu, VEU_MCR00, 0x0cc5);
783 sh_veu_reg_write(veu, VEU_MCR01, 0x0950);
784 sh_veu_reg_write(veu, VEU_MCR02, 0x0000);
785
786 sh_veu_reg_write(veu, VEU_MCR10, 0x397f);
787 sh_veu_reg_write(veu, VEU_MCR11, 0x0950);
788 sh_veu_reg_write(veu, VEU_MCR12, 0x3ccd);
789
790 sh_veu_reg_write(veu, VEU_MCR20, 0x0000);
791 sh_veu_reg_write(veu, VEU_MCR21, 0x0950);
792 sh_veu_reg_write(veu, VEU_MCR22, 0x1023);
793
794 sh_veu_reg_write(veu, VEU_COFFR, 0x00800010);
795 }
796 }
797
sh_veu_streamon(struct file * file,void * priv,enum v4l2_buf_type type)798 static int sh_veu_streamon(struct file *file, void *priv,
799 enum v4l2_buf_type type)
800 {
801 struct sh_veu_file *veu_file = priv;
802
803 if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, type))
804 return -EBUSY;
805
806 if (veu_file->cfg_needed) {
807 struct sh_veu_dev *veu = veu_file->veu_dev;
808 veu_file->cfg_needed = false;
809 sh_veu_configure(veu_file->veu_dev);
810 veu->xaction = 0;
811 veu->aborting = false;
812 }
813
814 return v4l2_m2m_streamon(file, veu_file->veu_dev->m2m_ctx, type);
815 }
816
sh_veu_streamoff(struct file * file,void * priv,enum v4l2_buf_type type)817 static int sh_veu_streamoff(struct file *file, void *priv,
818 enum v4l2_buf_type type)
819 {
820 struct sh_veu_file *veu_file = priv;
821
822 if (!sh_veu_is_streamer(veu_file->veu_dev, veu_file, type))
823 return -EBUSY;
824
825 return v4l2_m2m_streamoff(file, veu_file->veu_dev->m2m_ctx, type);
826 }
827
828 static const struct v4l2_ioctl_ops sh_veu_ioctl_ops = {
829 .vidioc_querycap = sh_veu_querycap,
830
831 .vidioc_enum_fmt_vid_cap = sh_veu_enum_fmt_vid_cap,
832 .vidioc_g_fmt_vid_cap = sh_veu_g_fmt_vid_cap,
833 .vidioc_try_fmt_vid_cap = sh_veu_try_fmt_vid_cap,
834 .vidioc_s_fmt_vid_cap = sh_veu_s_fmt_vid_cap,
835
836 .vidioc_enum_fmt_vid_out = sh_veu_enum_fmt_vid_out,
837 .vidioc_g_fmt_vid_out = sh_veu_g_fmt_vid_out,
838 .vidioc_try_fmt_vid_out = sh_veu_try_fmt_vid_out,
839 .vidioc_s_fmt_vid_out = sh_veu_s_fmt_vid_out,
840
841 .vidioc_reqbufs = sh_veu_reqbufs,
842 .vidioc_querybuf = sh_veu_querybuf,
843
844 .vidioc_qbuf = sh_veu_qbuf,
845 .vidioc_dqbuf = sh_veu_dqbuf,
846
847 .vidioc_streamon = sh_veu_streamon,
848 .vidioc_streamoff = sh_veu_streamoff,
849 };
850
851 /* ========== Queue operations ========== */
852
sh_veu_queue_setup(struct vb2_queue * vq,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],struct device * alloc_devs[])853 static int sh_veu_queue_setup(struct vb2_queue *vq,
854 unsigned int *nbuffers, unsigned int *nplanes,
855 unsigned int sizes[], struct device *alloc_devs[])
856 {
857 struct sh_veu_dev *veu = vb2_get_drv_priv(vq);
858 struct sh_veu_vfmt *vfmt = sh_veu_get_vfmt(veu, vq->type);
859 unsigned int count = *nbuffers;
860 unsigned int size = vfmt->bytesperline * vfmt->frame.height *
861 vfmt->fmt->depth / vfmt->fmt->ydepth;
862
863 if (count < 2)
864 *nbuffers = count = 2;
865
866 if (size * count > VIDEO_MEM_LIMIT) {
867 count = VIDEO_MEM_LIMIT / size;
868 *nbuffers = count;
869 }
870
871 if (*nplanes)
872 return sizes[0] < size ? -EINVAL : 0;
873
874 *nplanes = 1;
875 sizes[0] = size;
876
877 dev_dbg(veu->dev, "get %d buffer(s) of size %d each.\n", count, size);
878
879 return 0;
880 }
881
sh_veu_buf_prepare(struct vb2_buffer * vb)882 static int sh_veu_buf_prepare(struct vb2_buffer *vb)
883 {
884 struct sh_veu_dev *veu = vb2_get_drv_priv(vb->vb2_queue);
885 struct sh_veu_vfmt *vfmt;
886 unsigned int sizeimage;
887
888 vfmt = sh_veu_get_vfmt(veu, vb->vb2_queue->type);
889 sizeimage = vfmt->bytesperline * vfmt->frame.height *
890 vfmt->fmt->depth / vfmt->fmt->ydepth;
891
892 if (vb2_plane_size(vb, 0) < sizeimage) {
893 dev_dbg(veu->dev, "%s data will not fit into plane (%lu < %u)\n",
894 __func__, vb2_plane_size(vb, 0), sizeimage);
895 return -EINVAL;
896 }
897
898 vb2_set_plane_payload(vb, 0, sizeimage);
899
900 return 0;
901 }
902
sh_veu_buf_queue(struct vb2_buffer * vb)903 static void sh_veu_buf_queue(struct vb2_buffer *vb)
904 {
905 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
906 struct sh_veu_dev *veu = vb2_get_drv_priv(vb->vb2_queue);
907 dev_dbg(veu->dev, "%s(%d)\n", __func__, vb->type);
908 v4l2_m2m_buf_queue(veu->m2m_ctx, vbuf);
909 }
910
911 static const struct vb2_ops sh_veu_qops = {
912 .queue_setup = sh_veu_queue_setup,
913 .buf_prepare = sh_veu_buf_prepare,
914 .buf_queue = sh_veu_buf_queue,
915 .wait_prepare = vb2_ops_wait_prepare,
916 .wait_finish = vb2_ops_wait_finish,
917 };
918
sh_veu_queue_init(void * priv,struct vb2_queue * src_vq,struct vb2_queue * dst_vq)919 static int sh_veu_queue_init(void *priv, struct vb2_queue *src_vq,
920 struct vb2_queue *dst_vq)
921 {
922 struct sh_veu_dev *veu = priv;
923 int ret;
924
925 memset(src_vq, 0, sizeof(*src_vq));
926 src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
927 src_vq->io_modes = VB2_MMAP | VB2_USERPTR;
928 src_vq->drv_priv = veu;
929 src_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
930 src_vq->ops = &sh_veu_qops;
931 src_vq->mem_ops = &vb2_dma_contig_memops;
932 src_vq->lock = &veu->fop_lock;
933 src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
934 src_vq->dev = veu->v4l2_dev.dev;
935
936 ret = vb2_queue_init(src_vq);
937 if (ret < 0)
938 return ret;
939
940 memset(dst_vq, 0, sizeof(*dst_vq));
941 dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
942 dst_vq->io_modes = VB2_MMAP | VB2_USERPTR;
943 dst_vq->drv_priv = veu;
944 dst_vq->buf_struct_size = sizeof(struct v4l2_m2m_buffer);
945 dst_vq->ops = &sh_veu_qops;
946 dst_vq->mem_ops = &vb2_dma_contig_memops;
947 dst_vq->lock = &veu->fop_lock;
948 dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
949 dst_vq->dev = veu->v4l2_dev.dev;
950
951 return vb2_queue_init(dst_vq);
952 }
953
954 /* ========== File operations ========== */
955
sh_veu_open(struct file * file)956 static int sh_veu_open(struct file *file)
957 {
958 struct sh_veu_dev *veu = video_drvdata(file);
959 struct sh_veu_file *veu_file;
960
961 veu_file = kzalloc(sizeof(*veu_file), GFP_KERNEL);
962 if (!veu_file)
963 return -ENOMEM;
964
965 v4l2_fh_init(&veu_file->fh, video_devdata(file));
966 veu_file->veu_dev = veu;
967 veu_file->cfg_needed = true;
968
969 file->private_data = veu_file;
970
971 pm_runtime_get_sync(veu->dev);
972 v4l2_fh_add(&veu_file->fh);
973
974 dev_dbg(veu->dev, "Created instance %p\n", veu_file);
975
976 return 0;
977 }
978
sh_veu_release(struct file * file)979 static int sh_veu_release(struct file *file)
980 {
981 struct sh_veu_dev *veu = video_drvdata(file);
982 struct sh_veu_file *veu_file = file->private_data;
983
984 dev_dbg(veu->dev, "Releasing instance %p\n", veu_file);
985
986 if (veu_file == veu->capture) {
987 veu->capture = NULL;
988 vb2_queue_release(v4l2_m2m_get_vq(veu->m2m_ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE));
989 }
990
991 if (veu_file == veu->output) {
992 veu->output = NULL;
993 vb2_queue_release(v4l2_m2m_get_vq(veu->m2m_ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT));
994 }
995
996 if (!veu->output && !veu->capture && veu->m2m_ctx) {
997 v4l2_m2m_ctx_release(veu->m2m_ctx);
998 veu->m2m_ctx = NULL;
999 }
1000
1001 pm_runtime_put(veu->dev);
1002 v4l2_fh_del(&veu_file->fh);
1003 v4l2_fh_exit(&veu_file->fh);
1004
1005 kfree(veu_file);
1006
1007 return 0;
1008 }
1009
sh_veu_poll(struct file * file,struct poll_table_struct * wait)1010 static __poll_t sh_veu_poll(struct file *file,
1011 struct poll_table_struct *wait)
1012 {
1013 struct sh_veu_file *veu_file = file->private_data;
1014
1015 return v4l2_m2m_poll(file, veu_file->veu_dev->m2m_ctx, wait);
1016 }
1017
sh_veu_mmap(struct file * file,struct vm_area_struct * vma)1018 static int sh_veu_mmap(struct file *file, struct vm_area_struct *vma)
1019 {
1020 struct sh_veu_file *veu_file = file->private_data;
1021
1022 return v4l2_m2m_mmap(file, veu_file->veu_dev->m2m_ctx, vma);
1023 }
1024
1025 static const struct v4l2_file_operations sh_veu_fops = {
1026 .owner = THIS_MODULE,
1027 .open = sh_veu_open,
1028 .release = sh_veu_release,
1029 .poll = sh_veu_poll,
1030 .unlocked_ioctl = video_ioctl2,
1031 .mmap = sh_veu_mmap,
1032 };
1033
1034 static const struct video_device sh_veu_videodev = {
1035 .name = "sh-veu",
1036 .fops = &sh_veu_fops,
1037 .ioctl_ops = &sh_veu_ioctl_ops,
1038 .minor = -1,
1039 .release = video_device_release_empty,
1040 .vfl_dir = VFL_DIR_M2M,
1041 .device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING,
1042 };
1043
1044 static const struct v4l2_m2m_ops sh_veu_m2m_ops = {
1045 .device_run = sh_veu_device_run,
1046 .job_abort = sh_veu_job_abort,
1047 };
1048
sh_veu_bh(int irq,void * dev_id)1049 static irqreturn_t sh_veu_bh(int irq, void *dev_id)
1050 {
1051 struct sh_veu_dev *veu = dev_id;
1052
1053 if (veu->xaction == MEM2MEM_DEF_TRANSLEN || veu->aborting) {
1054 v4l2_m2m_job_finish(veu->m2m_dev, veu->m2m_ctx);
1055 veu->xaction = 0;
1056 } else {
1057 sh_veu_device_run(veu);
1058 }
1059
1060 return IRQ_HANDLED;
1061 }
1062
sh_veu_isr(int irq,void * dev_id)1063 static irqreturn_t sh_veu_isr(int irq, void *dev_id)
1064 {
1065 struct sh_veu_dev *veu = dev_id;
1066 struct vb2_v4l2_buffer *dst;
1067 struct vb2_v4l2_buffer *src;
1068 u32 status = sh_veu_reg_read(veu, VEU_EVTR);
1069
1070 /* bundle read mode not used */
1071 if (!(status & 1))
1072 return IRQ_NONE;
1073
1074 /* disable interrupt in VEU */
1075 sh_veu_reg_write(veu, VEU_EIER, 0);
1076 /* halt operation */
1077 sh_veu_reg_write(veu, VEU_STR, 0);
1078 /* ack int, write 0 to clear bits */
1079 sh_veu_reg_write(veu, VEU_EVTR, status & ~1);
1080
1081 /* conversion completed */
1082 dst = v4l2_m2m_dst_buf_remove(veu->m2m_ctx);
1083 src = v4l2_m2m_src_buf_remove(veu->m2m_ctx);
1084 if (!src || !dst)
1085 return IRQ_NONE;
1086
1087 dst->vb2_buf.timestamp = src->vb2_buf.timestamp;
1088 dst->flags &= ~V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
1089 dst->flags |=
1090 src->flags & V4L2_BUF_FLAG_TSTAMP_SRC_MASK;
1091 dst->timecode = src->timecode;
1092
1093 spin_lock(&veu->lock);
1094 v4l2_m2m_buf_done(src, VB2_BUF_STATE_DONE);
1095 v4l2_m2m_buf_done(dst, VB2_BUF_STATE_DONE);
1096 spin_unlock(&veu->lock);
1097
1098 veu->xaction++;
1099
1100 return IRQ_WAKE_THREAD;
1101 }
1102
sh_veu_probe(struct platform_device * pdev)1103 static int sh_veu_probe(struct platform_device *pdev)
1104 {
1105 struct sh_veu_dev *veu;
1106 struct resource *reg_res;
1107 struct video_device *vdev;
1108 int irq, ret;
1109
1110 reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1111 irq = platform_get_irq(pdev, 0);
1112
1113 if (!reg_res || irq <= 0) {
1114 dev_err(&pdev->dev, "Insufficient VEU platform information.\n");
1115 return -ENODEV;
1116 }
1117
1118 veu = devm_kzalloc(&pdev->dev, sizeof(*veu), GFP_KERNEL);
1119 if (!veu)
1120 return -ENOMEM;
1121
1122 veu->is_2h = resource_size(reg_res) == 0x22c;
1123
1124 veu->base = devm_ioremap_resource(&pdev->dev, reg_res);
1125 if (IS_ERR(veu->base))
1126 return PTR_ERR(veu->base);
1127
1128 ret = devm_request_threaded_irq(&pdev->dev, irq, sh_veu_isr, sh_veu_bh,
1129 0, "veu", veu);
1130 if (ret < 0)
1131 return ret;
1132
1133 ret = v4l2_device_register(&pdev->dev, &veu->v4l2_dev);
1134 if (ret < 0) {
1135 dev_err(&pdev->dev, "Error registering v4l2 device\n");
1136 return ret;
1137 }
1138
1139 vdev = &veu->vdev;
1140
1141 *vdev = sh_veu_videodev;
1142 vdev->v4l2_dev = &veu->v4l2_dev;
1143 spin_lock_init(&veu->lock);
1144 mutex_init(&veu->fop_lock);
1145 vdev->lock = &veu->fop_lock;
1146
1147 video_set_drvdata(vdev, veu);
1148
1149 veu->dev = &pdev->dev;
1150 veu->vfmt_out = DEFAULT_OUT_VFMT;
1151 veu->vfmt_in = DEFAULT_IN_VFMT;
1152
1153 veu->m2m_dev = v4l2_m2m_init(&sh_veu_m2m_ops);
1154 if (IS_ERR(veu->m2m_dev)) {
1155 ret = PTR_ERR(veu->m2m_dev);
1156 v4l2_err(&veu->v4l2_dev, "Failed to init mem2mem device: %d\n", ret);
1157 goto em2minit;
1158 }
1159
1160 pm_runtime_enable(&pdev->dev);
1161 pm_runtime_resume(&pdev->dev);
1162
1163 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1164 pm_runtime_suspend(&pdev->dev);
1165 if (ret < 0)
1166 goto evidreg;
1167
1168 return ret;
1169
1170 evidreg:
1171 pm_runtime_disable(&pdev->dev);
1172 v4l2_m2m_release(veu->m2m_dev);
1173 em2minit:
1174 v4l2_device_unregister(&veu->v4l2_dev);
1175 return ret;
1176 }
1177
sh_veu_remove(struct platform_device * pdev)1178 static int sh_veu_remove(struct platform_device *pdev)
1179 {
1180 struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1181 struct sh_veu_dev *veu = container_of(v4l2_dev,
1182 struct sh_veu_dev, v4l2_dev);
1183
1184 video_unregister_device(&veu->vdev);
1185 pm_runtime_disable(&pdev->dev);
1186 v4l2_m2m_release(veu->m2m_dev);
1187 v4l2_device_unregister(&veu->v4l2_dev);
1188
1189 return 0;
1190 }
1191
1192 static struct platform_driver __refdata sh_veu_pdrv = {
1193 .remove = sh_veu_remove,
1194 .driver = {
1195 .name = "sh_veu",
1196 },
1197 };
1198
1199 module_platform_driver_probe(sh_veu_pdrv, sh_veu_probe);
1200
1201 MODULE_DESCRIPTION("sh-mobile VEU mem2mem driver");
1202 MODULE_AUTHOR("Guennadi Liakhovetski, <g.liakhovetski@gmx.de>");
1203 MODULE_LICENSE("GPL v2");
1204
