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authorGuennadi Liakhovetski <g.liakhovetski@gmx.de>2010-03-17 10:21:13 -0400
committerMauro Carvalho Chehab <mchehab@redhat.com>2010-05-19 11:58:01 -0400
commita81fb9b223508f5773d8d7e226b1574d1b068642 (patch)
tree3af26951f271365b3fe06e8c27827c49ec7dfc24 /drivers
parentf35f1bb8fc1e56646a3dab0ecd12e23bca6323c4 (diff)
V4L/DVB: V4L: SuperH Video Output Unit (VOU) driver
A number of SuperH Mobile SoCs, including sh7724, include a Video Output Unit. This patch adds a video (V4L2) output driver for it. The driver uses v4l2-subdev and mediabus APIs to interface to TV encoders. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Acked-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/media/video/Kconfig7
-rw-r--r--drivers/media/video/Makefile4
-rw-r--r--drivers/media/video/sh_vou.c1476
3 files changed, 1487 insertions, 0 deletions
diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
index 784743187a61..e2fad460a759 100644
--- a/drivers/media/video/Kconfig
+++ b/drivers/media/video/Kconfig
@@ -520,6 +520,13 @@ config DISPLAY_DAVINCI_DM646X_EVM
520 To compile this driver as a module, choose M here: the 520 To compile this driver as a module, choose M here: the
521 module will be called vpif_display. 521 module will be called vpif_display.
522 522
523config VIDEO_SH_VOU
524 tristate "SuperH VOU video output driver"
525 depends on VIDEO_DEV && ARCH_SHMOBILE
526 select VIDEOBUF_DMA_CONTIG
527 help
528 Support for the Video Output Unit (VOU) on SuperH SoCs.
529
523config CAPTURE_DAVINCI_DM646X_EVM 530config CAPTURE_DAVINCI_DM646X_EVM
524 tristate "DM646x EVM Video Capture" 531 tristate "DM646x EVM Video Capture"
525 depends on VIDEO_DEV && MACH_DAVINCI_DM6467_EVM 532 depends on VIDEO_DEV && MACH_DAVINCI_DM6467_EVM
diff --git a/drivers/media/video/Makefile b/drivers/media/video/Makefile
index c51c386559f2..ed52b6be4eca 100644
--- a/drivers/media/video/Makefile
+++ b/drivers/media/video/Makefile
@@ -160,6 +160,10 @@ obj-$(CONFIG_VIDEO_MX3) += mx3_camera.o
160obj-$(CONFIG_VIDEO_PXA27x) += pxa_camera.o 160obj-$(CONFIG_VIDEO_PXA27x) += pxa_camera.o
161obj-$(CONFIG_VIDEO_SH_MOBILE_CEU) += sh_mobile_ceu_camera.o 161obj-$(CONFIG_VIDEO_SH_MOBILE_CEU) += sh_mobile_ceu_camera.o
162 162
163obj-$(CONFIG_ARCH_DAVINCI) += davinci/
164
165obj-$(CONFIG_VIDEO_SH_VOU) += sh_vou.o
166
163obj-$(CONFIG_VIDEO_AU0828) += au0828/ 167obj-$(CONFIG_VIDEO_AU0828) += au0828/
164 168
165obj-$(CONFIG_USB_VIDEO_CLASS) += uvc/ 169obj-$(CONFIG_USB_VIDEO_CLASS) += uvc/
diff --git a/drivers/media/video/sh_vou.c b/drivers/media/video/sh_vou.c
new file mode 100644
index 000000000000..f5b892a2a8ee
--- /dev/null
+++ b/drivers/media/video/sh_vou.c
@@ -0,0 +1,1476 @@
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/version.h>
22#include <linux/videodev2.h>
23
24#include <media/sh_vou.h>
25#include <media/v4l2-common.h>
26#include <media/v4l2-device.h>
27#include <media/v4l2-ioctl.h>
28#include <media/v4l2-mediabus.h>
29#include <media/videobuf-dma-contig.h>
30
31/* Mirror addresses are not available for all registers */
32#define VOUER 0
33#define VOUCR 4
34#define VOUSTR 8
35#define VOUVCR 0xc
36#define VOUISR 0x10
37#define VOUBCR 0x14
38#define VOUDPR 0x18
39#define VOUDSR 0x1c
40#define VOUVPR 0x20
41#define VOUIR 0x24
42#define VOUSRR 0x28
43#define VOUMSR 0x2c
44#define VOUHIR 0x30
45#define VOUDFR 0x34
46#define VOUAD1R 0x38
47#define VOUAD2R 0x3c
48#define VOUAIR 0x40
49#define VOUSWR 0x44
50#define VOURCR 0x48
51#define VOURPR 0x50
52
53enum sh_vou_status {
54 SH_VOU_IDLE,
55 SH_VOU_INITIALISING,
56 SH_VOU_RUNNING,
57};
58
59#define VOU_MAX_IMAGE_WIDTH 720
60#define VOU_MAX_IMAGE_HEIGHT 480
61
62struct sh_vou_device {
63 struct v4l2_device v4l2_dev;
64 struct video_device *vdev;
65 atomic_t use_count;
66 struct sh_vou_pdata *pdata;
67 spinlock_t lock;
68 void __iomem *base;
69 /* State information */
70 struct v4l2_pix_format pix;
71 struct v4l2_rect rect;
72 struct list_head queue;
73 v4l2_std_id std;
74 int pix_idx;
75 struct videobuf_buffer *active;
76 enum sh_vou_status status;
77};
78
79struct sh_vou_file {
80 struct videobuf_queue vbq;
81};
82
83/* Register access routines for sides A, B and mirror addresses */
84static void sh_vou_reg_a_write(struct sh_vou_device *vou_dev, unsigned int reg,
85 u32 value)
86{
87 __raw_writel(value, vou_dev->base + reg);
88}
89
90static void sh_vou_reg_ab_write(struct sh_vou_device *vou_dev, unsigned int reg,
91 u32 value)
92{
93 __raw_writel(value, vou_dev->base + reg);
94 __raw_writel(value, vou_dev->base + reg + 0x1000);
95}
96
97static void sh_vou_reg_m_write(struct sh_vou_device *vou_dev, unsigned int reg,
98 u32 value)
99{
100 __raw_writel(value, vou_dev->base + reg + 0x2000);
101}
102
103static u32 sh_vou_reg_a_read(struct sh_vou_device *vou_dev, unsigned int reg)
104{
105 return __raw_readl(vou_dev->base + reg);
106}
107
108static void sh_vou_reg_a_set(struct sh_vou_device *vou_dev, unsigned int reg,
109 u32 value, u32 mask)
110{
111 u32 old = __raw_readl(vou_dev->base + reg);
112
113 value = (value & mask) | (old & ~mask);
114 __raw_writel(value, vou_dev->base + reg);
115}
116
117static void sh_vou_reg_b_set(struct sh_vou_device *vou_dev, unsigned int reg,
118 u32 value, u32 mask)
119{
120 sh_vou_reg_a_set(vou_dev, reg + 0x1000, value, mask);
121}
122
123static void sh_vou_reg_ab_set(struct sh_vou_device *vou_dev, unsigned int reg,
124 u32 value, u32 mask)
125{
126 sh_vou_reg_a_set(vou_dev, reg, value, mask);
127 sh_vou_reg_b_set(vou_dev, reg, value, mask);
128}
129
130struct sh_vou_fmt {
131 u32 pfmt;
132 char *desc;
133 unsigned char bpp;
134 unsigned char rgb;
135 unsigned char yf;
136 unsigned char pkf;
137};
138
139/* Further pixel formats can be added */
140static struct sh_vou_fmt vou_fmt[] = {
141 {
142 .pfmt = V4L2_PIX_FMT_NV12,
143 .bpp = 12,
144 .desc = "YVU420 planar",
145 .yf = 0,
146 .rgb = 0,
147 },
148 {
149 .pfmt = V4L2_PIX_FMT_NV16,
150 .bpp = 16,
151 .desc = "YVYU planar",
152 .yf = 1,
153 .rgb = 0,
154 },
155 {
156 .pfmt = V4L2_PIX_FMT_RGB24,
157 .bpp = 24,
158 .desc = "RGB24",
159 .pkf = 2,
160 .rgb = 1,
161 },
162 {
163 .pfmt = V4L2_PIX_FMT_RGB565,
164 .bpp = 16,
165 .desc = "RGB565",
166 .pkf = 3,
167 .rgb = 1,
168 },
169 {
170 .pfmt = V4L2_PIX_FMT_RGB565X,
171 .bpp = 16,
172 .desc = "RGB565 byteswapped",
173 .pkf = 3,
174 .rgb = 1,
175 },
176};
177
178static void sh_vou_schedule_next(struct sh_vou_device *vou_dev,
179 struct videobuf_buffer *vb)
180{
181 dma_addr_t addr1, addr2;
182
183 addr1 = videobuf_to_dma_contig(vb);
184 switch (vou_dev->pix.pixelformat) {
185 case V4L2_PIX_FMT_NV12:
186 case V4L2_PIX_FMT_NV16:
187 addr2 = addr1 + vou_dev->pix.width * vou_dev->pix.height;
188 break;
189 default:
190 addr2 = 0;
191 }
192
193 sh_vou_reg_m_write(vou_dev, VOUAD1R, addr1);
194 sh_vou_reg_m_write(vou_dev, VOUAD2R, addr2);
195}
196
197static void sh_vou_stream_start(struct sh_vou_device *vou_dev,
198 struct videobuf_buffer *vb)
199{
200 unsigned int row_coeff;
201#ifdef __LITTLE_ENDIAN
202 u32 dataswap = 7;
203#else
204 u32 dataswap = 0;
205#endif
206
207 switch (vou_dev->pix.pixelformat) {
208 case V4L2_PIX_FMT_NV12:
209 case V4L2_PIX_FMT_NV16:
210 row_coeff = 1;
211 break;
212 case V4L2_PIX_FMT_RGB565:
213 dataswap ^= 1;
214 case V4L2_PIX_FMT_RGB565X:
215 row_coeff = 2;
216 break;
217 case V4L2_PIX_FMT_RGB24:
218 row_coeff = 3;
219 break;
220 }
221
222 sh_vou_reg_a_write(vou_dev, VOUSWR, dataswap);
223 sh_vou_reg_ab_write(vou_dev, VOUAIR, vou_dev->pix.width * row_coeff);
224 sh_vou_schedule_next(vou_dev, vb);
225}
226
227static void free_buffer(struct videobuf_queue *vq, struct videobuf_buffer *vb)
228{
229 BUG_ON(in_interrupt());
230
231 /* Wait until this buffer is no longer in STATE_QUEUED or STATE_ACTIVE */
232 videobuf_waiton(vb, 0, 0);
233 videobuf_dma_contig_free(vq, vb);
234 vb->state = VIDEOBUF_NEEDS_INIT;
235}
236
237/* Locking: caller holds vq->vb_lock mutex */
238static int sh_vou_buf_setup(struct videobuf_queue *vq, unsigned int *count,
239 unsigned int *size)
240{
241 struct video_device *vdev = vq->priv_data;
242 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
243
244 *size = vou_fmt[vou_dev->pix_idx].bpp * vou_dev->pix.width *
245 vou_dev->pix.height / 8;
246
247 if (*count < 2)
248 *count = 2;
249
250 /* Taking into account maximum frame size, *count will stay >= 2 */
251 if (PAGE_ALIGN(*size) * *count > 4 * 1024 * 1024)
252 *count = 4 * 1024 * 1024 / PAGE_ALIGN(*size);
253
254 dev_dbg(vq->dev, "%s(): count=%d, size=%d\n", __func__, *count, *size);
255
256 return 0;
257}
258
259/* Locking: caller holds vq->vb_lock mutex */
260static int sh_vou_buf_prepare(struct videobuf_queue *vq,
261 struct videobuf_buffer *vb,
262 enum v4l2_field field)
263{
264 struct video_device *vdev = vq->priv_data;
265 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
266 struct v4l2_pix_format *pix = &vou_dev->pix;
267 int bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
268 int ret;
269
270 dev_dbg(vq->dev, "%s()\n", __func__);
271
272 if (vb->width != pix->width ||
273 vb->height != pix->height ||
274 vb->field != pix->field) {
275 vb->width = pix->width;
276 vb->height = pix->height;
277 vb->field = field;
278 if (vb->state != VIDEOBUF_NEEDS_INIT)
279 free_buffer(vq, vb);
280 }
281
282 vb->size = vb->height * bytes_per_line;
283 if (vb->baddr && vb->bsize < vb->size) {
284 /* User buffer too small */
285 dev_warn(vq->dev, "User buffer too small: [%u] @ %lx\n",
286 vb->bsize, vb->baddr);
287 return -EINVAL;
288 }
289
290 if (vb->state == VIDEOBUF_NEEDS_INIT) {
291 ret = videobuf_iolock(vq, vb, NULL);
292 if (ret < 0) {
293 dev_warn(vq->dev, "IOLOCK buf-type %d: %d\n",
294 vb->memory, ret);
295 return ret;
296 }
297 vb->state = VIDEOBUF_PREPARED;
298 }
299
300 dev_dbg(vq->dev,
301 "%s(): fmt #%d, %u bytes per line, phys 0x%x, type %d, state %d\n",
302 __func__, vou_dev->pix_idx, bytes_per_line,
303 videobuf_to_dma_contig(vb), vb->memory, vb->state);
304
305 return 0;
306}
307
308/* Locking: caller holds vq->vb_lock mutex and vq->irqlock spinlock */
309static void sh_vou_buf_queue(struct videobuf_queue *vq,
310 struct videobuf_buffer *vb)
311{
312 struct video_device *vdev = vq->priv_data;
313 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
314
315 dev_dbg(vq->dev, "%s()\n", __func__);
316
317 vb->state = VIDEOBUF_QUEUED;
318 list_add_tail(&vb->queue, &vou_dev->queue);
319
320 if (vou_dev->status == SH_VOU_RUNNING) {
321 return;
322 } else if (!vou_dev->active) {
323 vou_dev->active = vb;
324 /* Start from side A: we use mirror addresses, so, set B */
325 sh_vou_reg_a_write(vou_dev, VOURPR, 1);
326 dev_dbg(vq->dev, "%s: first buffer status 0x%x\n", __func__,
327 sh_vou_reg_a_read(vou_dev, VOUSTR));
328 sh_vou_schedule_next(vou_dev, vb);
329 /* Only activate VOU after the second buffer */
330 } else if (vou_dev->active->queue.next == &vb->queue) {
331 /* Second buffer - initialise register side B */
332 sh_vou_reg_a_write(vou_dev, VOURPR, 0);
333 sh_vou_stream_start(vou_dev, vb);
334
335 /* Register side switching with frame VSYNC */
336 sh_vou_reg_a_write(vou_dev, VOURCR, 5);
337 dev_dbg(vq->dev, "%s: second buffer status 0x%x\n", __func__,
338 sh_vou_reg_a_read(vou_dev, VOUSTR));
339
340 /* Enable End-of-Frame (VSYNC) interrupts */
341 sh_vou_reg_a_write(vou_dev, VOUIR, 0x10004);
342 /* Two buffers on the queue - activate the hardware */
343
344 vou_dev->status = SH_VOU_RUNNING;
345 sh_vou_reg_a_write(vou_dev, VOUER, 0x107);
346 }
347}
348
349static void sh_vou_buf_release(struct videobuf_queue *vq,
350 struct videobuf_buffer *vb)
351{
352 struct video_device *vdev = vq->priv_data;
353 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
354 unsigned long flags;
355
356 dev_dbg(vq->dev, "%s()\n", __func__);
357
358 spin_lock_irqsave(&vou_dev->lock, flags);
359
360 if (vou_dev->active == vb) {
361 /* disable output */
362 sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
363 /* ...but the current frame will complete */
364 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
365 vou_dev->active = NULL;
366 }
367
368 if ((vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED)) {
369 vb->state = VIDEOBUF_ERROR;
370 list_del(&vb->queue);
371 }
372
373 spin_unlock_irqrestore(&vou_dev->lock, flags);
374
375 free_buffer(vq, vb);
376}
377
378static struct videobuf_queue_ops sh_vou_video_qops = {
379 .buf_setup = sh_vou_buf_setup,
380 .buf_prepare = sh_vou_buf_prepare,
381 .buf_queue = sh_vou_buf_queue,
382 .buf_release = sh_vou_buf_release,
383};
384
385/* Video IOCTLs */
386static int sh_vou_querycap(struct file *file, void *priv,
387 struct v4l2_capability *cap)
388{
389 struct sh_vou_file *vou_file = priv;
390
391 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
392
393 strlcpy(cap->card, "SuperH VOU", sizeof(cap->card));
394 cap->version = KERNEL_VERSION(0, 1, 0);
395 cap->capabilities = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_STREAMING;
396 return 0;
397}
398
399/* Enumerate formats, that the device can accept from the user */
400static int sh_vou_enum_fmt_vid_out(struct file *file, void *priv,
401 struct v4l2_fmtdesc *fmt)
402{
403 struct sh_vou_file *vou_file = priv;
404
405 if (fmt->index >= ARRAY_SIZE(vou_fmt))
406 return -EINVAL;
407
408 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
409
410 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
411 strlcpy(fmt->description, vou_fmt[fmt->index].desc,
412 sizeof(fmt->description));
413 fmt->pixelformat = vou_fmt[fmt->index].pfmt;
414
415 return 0;
416}
417
418static int sh_vou_g_fmt_vid_out(struct file *file, void *priv,
419 struct v4l2_format *fmt)
420{
421 struct video_device *vdev = video_devdata(file);
422 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
423
424 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
425
426 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
427 fmt->fmt.pix = vou_dev->pix;
428
429 return 0;
430}
431
432static const unsigned char vou_scale_h_num[] = {1, 9, 2, 9, 4};
433static const unsigned char vou_scale_h_den[] = {1, 8, 1, 4, 1};
434static const unsigned char vou_scale_h_fld[] = {0, 2, 1, 3};
435static const unsigned char vou_scale_v_num[] = {1, 2, 4};
436static const unsigned char vou_scale_v_den[] = {1, 1, 1};
437static const unsigned char vou_scale_v_fld[] = {0, 1};
438
439static void sh_vou_configure_geometry(struct sh_vou_device *vou_dev,
440 int pix_idx, int w_idx, int h_idx)
441{
442 struct sh_vou_fmt *fmt = vou_fmt + pix_idx;
443 unsigned int black_left, black_top, width_max, height_max,
444 frame_in_height, frame_out_height, frame_out_top;
445 struct v4l2_rect *rect = &vou_dev->rect;
446 struct v4l2_pix_format *pix = &vou_dev->pix;
447 u32 vouvcr = 0, dsr_h, dsr_v;
448
449 if (vou_dev->std & V4L2_STD_525_60) {
450 width_max = 858;
451 height_max = 262;
452 } else {
453 width_max = 864;
454 height_max = 312;
455 }
456
457 frame_in_height = pix->height / 2;
458 frame_out_height = rect->height / 2;
459 frame_out_top = rect->top / 2;
460
461 /*
462 * Cropping scheme: max useful image is 720x480, and the total video
463 * area is 858x525 (NTSC) or 864x625 (PAL). AK8813 / 8814 starts
464 * sampling data beginning with fixed 276th (NTSC) / 288th (PAL) clock,
465 * of which the first 33 / 25 clocks HSYNC must be held active. This
466 * has to be configured in CR[HW]. 1 pixel equals 2 clock periods.
467 * This gives CR[HW] = 16 / 12, VPR[HVP] = 138 / 144, which gives
468 * exactly 858 - 138 = 864 - 144 = 720! We call the out-of-display area,
469 * beyond DSR, specified on the left and top by the VPR register "black
470 * pixels" and out-of-image area (DPR) "background pixels." We fix VPR
471 * at 138 / 144 : 20, because that's the HSYNC timing, that our first
472 * client requires, and that's exactly what leaves us 720 pixels for the
473 * image; we leave VPR[VVP] at default 20 for now, because the client
474 * doesn't seem to have any special requirements for it. Otherwise we
475 * could also set it to max - 240 = 22 / 72. Thus VPR depends only on
476 * the selected standard, and DPR and DSR are selected according to
477 * cropping. Q: how does the client detect the first valid line? Does
478 * HSYNC stay inactive during invalid (black) lines?
479 */
480 black_left = width_max - VOU_MAX_IMAGE_WIDTH;
481 black_top = 20;
482
483 dsr_h = rect->width + rect->left;
484 dsr_v = frame_out_height + frame_out_top;
485
486 dev_dbg(vou_dev->v4l2_dev.dev,
487 "image %ux%u, black %u:%u, offset %u:%u, display %ux%u\n",
488 pix->width, frame_in_height, black_left, black_top,
489 rect->left, frame_out_top, dsr_h, dsr_v);
490
491 /* VOUISR height - half of a frame height in frame mode */
492 sh_vou_reg_ab_write(vou_dev, VOUISR, (pix->width << 16) | frame_in_height);
493 sh_vou_reg_ab_write(vou_dev, VOUVPR, (black_left << 16) | black_top);
494 sh_vou_reg_ab_write(vou_dev, VOUDPR, (rect->left << 16) | frame_out_top);
495 sh_vou_reg_ab_write(vou_dev, VOUDSR, (dsr_h << 16) | dsr_v);
496
497 /*
498 * if necessary, we could set VOUHIR to
499 * max(black_left + dsr_h, width_max) here
500 */
501
502 if (w_idx)
503 vouvcr |= (1 << 15) | (vou_scale_h_fld[w_idx - 1] << 4);
504 if (h_idx)
505 vouvcr |= (1 << 14) | vou_scale_v_fld[h_idx - 1];
506
507 dev_dbg(vou_dev->v4l2_dev.dev, "%s: scaling 0x%x\n", fmt->desc, vouvcr);
508
509 /* To produce a colour bar for testing set bit 23 of VOUVCR */
510 sh_vou_reg_ab_write(vou_dev, VOUVCR, vouvcr);
511 sh_vou_reg_ab_write(vou_dev, VOUDFR,
512 fmt->pkf | (fmt->yf << 8) | (fmt->rgb << 16));
513}
514
515struct sh_vou_geometry {
516 struct v4l2_rect output;
517 unsigned int in_width;
518 unsigned int in_height;
519 int scale_idx_h;
520 int scale_idx_v;
521};
522
523/*
524 * Find input geometry, that we can use to produce output, closest to the
525 * requested rectangle, using VOU scaling
526 */
527static void vou_adjust_input(struct sh_vou_geometry *geo, v4l2_std_id std)
528{
529 /* The compiler cannot know, that best and idx will indeed be set */
530 unsigned int best_err = UINT_MAX, best = 0, width_max, height_max;
531 int i, idx = 0;
532
533 if (std & V4L2_STD_525_60) {
534 width_max = 858;
535 height_max = 262;
536 } else {
537 width_max = 864;
538 height_max = 312;
539 }
540
541 /* Image width must be a multiple of 4 */
542 v4l_bound_align_image(&geo->in_width, 0, VOU_MAX_IMAGE_WIDTH, 2,
543 &geo->in_height, 0, VOU_MAX_IMAGE_HEIGHT, 1, 0);
544
545 /* Select scales to come as close as possible to the output image */
546 for (i = ARRAY_SIZE(vou_scale_h_num) - 1; i >= 0; i--) {
547 unsigned int err;
548 unsigned int found = geo->output.width * vou_scale_h_den[i] /
549 vou_scale_h_num[i];
550
551 if (found > VOU_MAX_IMAGE_WIDTH)
552 /* scales increase */
553 break;
554
555 err = abs(found - geo->in_width);
556 if (err < best_err) {
557 best_err = err;
558 idx = i;
559 best = found;
560 }
561 if (!err)
562 break;
563 }
564
565 geo->in_width = best;
566 geo->scale_idx_h = idx;
567
568 best_err = UINT_MAX;
569
570 /* This loop can be replaced with one division */
571 for (i = ARRAY_SIZE(vou_scale_v_num) - 1; i >= 0; i--) {
572 unsigned int err;
573 unsigned int found = geo->output.height * vou_scale_v_den[i] /
574 vou_scale_v_num[i];
575
576 if (found > VOU_MAX_IMAGE_HEIGHT)
577 /* scales increase */
578 break;
579
580 err = abs(found - geo->in_height);
581 if (err < best_err) {
582 best_err = err;
583 idx = i;
584 best = found;
585 }
586 if (!err)
587 break;
588 }
589
590 geo->in_height = best;
591 geo->scale_idx_v = idx;
592}
593
594/*
595 * Find output geometry, that we can produce, using VOU scaling, closest to
596 * the requested rectangle
597 */
598static void vou_adjust_output(struct sh_vou_geometry *geo, v4l2_std_id std)
599{
600 unsigned int best_err = UINT_MAX, best, width_max, height_max;
601 int i, idx;
602
603 if (std & V4L2_STD_525_60) {
604 width_max = 858;
605 height_max = 262 * 2;
606 } else {
607 width_max = 864;
608 height_max = 312 * 2;
609 }
610
611 /* Select scales to come as close as possible to the output image */
612 for (i = 0; i < ARRAY_SIZE(vou_scale_h_num); i++) {
613 unsigned int err;
614 unsigned int found = geo->in_width * vou_scale_h_num[i] /
615 vou_scale_h_den[i];
616
617 if (found > VOU_MAX_IMAGE_WIDTH)
618 /* scales increase */
619 break;
620
621 err = abs(found - geo->output.width);
622 if (err < best_err) {
623 best_err = err;
624 idx = i;
625 best = found;
626 }
627 if (!err)
628 break;
629 }
630
631 geo->output.width = best;
632 geo->scale_idx_h = idx;
633 if (geo->output.left + best > width_max)
634 geo->output.left = width_max - best;
635
636 pr_debug("%s(): W %u * %u/%u = %u\n", __func__, geo->in_width,
637 vou_scale_h_num[idx], vou_scale_h_den[idx], best);
638
639 best_err = UINT_MAX;
640
641 /* This loop can be replaced with one division */
642 for (i = 0; i < ARRAY_SIZE(vou_scale_v_num); i++) {
643 unsigned int err;
644 unsigned int found = geo->in_height * vou_scale_v_num[i] /
645 vou_scale_v_den[i];
646
647 if (found > VOU_MAX_IMAGE_HEIGHT)
648 /* scales increase */
649 break;
650
651 err = abs(found - geo->output.height);
652 if (err < best_err) {
653 best_err = err;
654 idx = i;
655 best = found;
656 }
657 if (!err)
658 break;
659 }
660
661 geo->output.height = best;
662 geo->scale_idx_v = idx;
663 if (geo->output.top + best > height_max)
664 geo->output.top = height_max - best;
665
666 pr_debug("%s(): H %u * %u/%u = %u\n", __func__, geo->in_height,
667 vou_scale_v_num[idx], vou_scale_v_den[idx], best);
668}
669
670static int sh_vou_s_fmt_vid_out(struct file *file, void *priv,
671 struct v4l2_format *fmt)
672{
673 struct video_device *vdev = video_devdata(file);
674 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
675 struct v4l2_pix_format *pix = &fmt->fmt.pix;
676 int pix_idx;
677 struct sh_vou_geometry geo;
678 struct v4l2_mbus_framefmt mbfmt = {
679 /* Revisit: is this the correct code? */
680 .code = V4L2_MBUS_FMT_YUYV8_2X8_LE,
681 .field = V4L2_FIELD_INTERLACED,
682 .colorspace = V4L2_COLORSPACE_SMPTE170M,
683 };
684 int ret;
685
686 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
687 vou_dev->rect.width, vou_dev->rect.height,
688 pix->width, pix->height);
689
690 if (pix->field == V4L2_FIELD_ANY)
691 pix->field = V4L2_FIELD_NONE;
692
693 if (fmt->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
694 pix->field != V4L2_FIELD_NONE)
695 return -EINVAL;
696
697 for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
698 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
699 break;
700
701 if (pix_idx == ARRAY_SIZE(vou_fmt))
702 return -EINVAL;
703
704 /* Image width must be a multiple of 4 */
705 v4l_bound_align_image(&pix->width, 0, VOU_MAX_IMAGE_WIDTH, 2,
706 &pix->height, 0, VOU_MAX_IMAGE_HEIGHT, 1, 0);
707
708 geo.in_width = pix->width;
709 geo.in_height = pix->height;
710 geo.output = vou_dev->rect;
711
712 vou_adjust_output(&geo, vou_dev->std);
713
714 mbfmt.width = geo.output.width;
715 mbfmt.height = geo.output.height;
716 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
717 s_mbus_fmt, &mbfmt);
718 /* Must be implemented, so, don't check for -ENOIOCTLCMD */
719 if (ret < 0)
720 return ret;
721
722 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
723 geo.output.width, geo.output.height, mbfmt.width, mbfmt.height);
724
725 /* Sanity checks */
726 if ((unsigned)mbfmt.width > VOU_MAX_IMAGE_WIDTH ||
727 (unsigned)mbfmt.height > VOU_MAX_IMAGE_HEIGHT ||
728 mbfmt.code != V4L2_MBUS_FMT_YUYV8_2X8_LE)
729 return -EIO;
730
731 if (mbfmt.width != geo.output.width ||
732 mbfmt.height != geo.output.height) {
733 geo.output.width = mbfmt.width;
734 geo.output.height = mbfmt.height;
735
736 vou_adjust_input(&geo, vou_dev->std);
737 }
738
739 /* We tried to preserve output rectangle, but it could have changed */
740 vou_dev->rect = geo.output;
741 pix->width = geo.in_width;
742 pix->height = geo.in_height;
743
744 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u\n", __func__,
745 pix->width, pix->height);
746
747 vou_dev->pix_idx = pix_idx;
748
749 vou_dev->pix = *pix;
750
751 sh_vou_configure_geometry(vou_dev, pix_idx,
752 geo.scale_idx_h, geo.scale_idx_v);
753
754 return 0;
755}
756
757static int sh_vou_try_fmt_vid_out(struct file *file, void *priv,
758 struct v4l2_format *fmt)
759{
760 struct sh_vou_file *vou_file = priv;
761 struct v4l2_pix_format *pix = &fmt->fmt.pix;
762 int i;
763
764 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
765
766 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
767 pix->field = V4L2_FIELD_NONE;
768
769 v4l_bound_align_image(&pix->width, 0, VOU_MAX_IMAGE_WIDTH, 1,
770 &pix->height, 0, VOU_MAX_IMAGE_HEIGHT, 1, 0);
771
772 for (i = 0; ARRAY_SIZE(vou_fmt); i++)
773 if (vou_fmt[i].pfmt == pix->pixelformat)
774 return 0;
775
776 pix->pixelformat = vou_fmt[0].pfmt;
777
778 return 0;
779}
780
781static int sh_vou_reqbufs(struct file *file, void *priv,
782 struct v4l2_requestbuffers *req)
783{
784 struct sh_vou_file *vou_file = priv;
785
786 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
787
788 if (req->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
789 return -EINVAL;
790
791 return videobuf_reqbufs(&vou_file->vbq, req);
792}
793
794static int sh_vou_querybuf(struct file *file, void *priv,
795 struct v4l2_buffer *b)
796{
797 struct sh_vou_file *vou_file = priv;
798
799 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
800
801 return videobuf_querybuf(&vou_file->vbq, b);
802}
803
804static int sh_vou_qbuf(struct file *file, void *priv, struct v4l2_buffer *b)
805{
806 struct sh_vou_file *vou_file = priv;
807
808 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
809
810 return videobuf_qbuf(&vou_file->vbq, b);
811}
812
813static int sh_vou_dqbuf(struct file *file, void *priv, struct v4l2_buffer *b)
814{
815 struct sh_vou_file *vou_file = priv;
816
817 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
818
819 return videobuf_dqbuf(&vou_file->vbq, b, file->f_flags & O_NONBLOCK);
820}
821
822static int sh_vou_streamon(struct file *file, void *priv,
823 enum v4l2_buf_type buftype)
824{
825 struct video_device *vdev = video_devdata(file);
826 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
827 struct sh_vou_file *vou_file = priv;
828 int ret;
829
830 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
831
832 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
833 video, s_stream, 1);
834 if (ret < 0 && ret != -ENOIOCTLCMD)
835 return ret;
836
837 /* This calls our .buf_queue() (== sh_vou_buf_queue) */
838 return videobuf_streamon(&vou_file->vbq);
839}
840
841static int sh_vou_streamoff(struct file *file, void *priv,
842 enum v4l2_buf_type buftype)
843{
844 struct video_device *vdev = video_devdata(file);
845 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
846 struct sh_vou_file *vou_file = priv;
847
848 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
849
850 /*
851 * This calls buf_release from host driver's videobuf_queue_ops for all
852 * remaining buffers. When the last buffer is freed, stop streaming
853 */
854 videobuf_streamoff(&vou_file->vbq);
855 v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video, s_stream, 0);
856
857 return 0;
858}
859
860static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)
861{
862 switch (bus_fmt) {
863 default:
864 pr_warning("%s(): Invalid bus-format code %d, using default 8-bit\n",
865 __func__, bus_fmt);
866 case SH_VOU_BUS_8BIT:
867 return 1;
868 case SH_VOU_BUS_16BIT:
869 return 0;
870 case SH_VOU_BUS_BT656:
871 return 3;
872 }
873}
874
875static int sh_vou_s_std(struct file *file, void *priv, v4l2_std_id *std_id)
876{
877 struct video_device *vdev = video_devdata(file);
878 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
879 int ret;
880
881 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): 0x%llx\n", __func__, *std_id);
882
883 if (*std_id & ~vdev->tvnorms)
884 return -EINVAL;
885
886 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
887 s_std_output, *std_id);
888 /* Shall we continue, if the subdev doesn't support .s_std_output()? */
889 if (ret < 0 && ret != -ENOIOCTLCMD)
890 return ret;
891
892 if (*std_id & V4L2_STD_525_60)
893 sh_vou_reg_ab_set(vou_dev, VOUCR,
894 sh_vou_ntsc_mode(vou_dev->pdata->bus_fmt) << 29, 7 << 29);
895 else
896 sh_vou_reg_ab_set(vou_dev, VOUCR, 5 << 29, 7 << 29);
897
898 vou_dev->std = *std_id;
899
900 return 0;
901}
902
903static int sh_vou_g_std(struct file *file, void *priv, v4l2_std_id *std)
904{
905 struct video_device *vdev = video_devdata(file);
906 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
907
908 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
909
910 *std = vou_dev->std;
911
912 return 0;
913}
914
915static int sh_vou_g_crop(struct file *file, void *fh, struct v4l2_crop *a)
916{
917 struct video_device *vdev = video_devdata(file);
918 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
919
920 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
921
922 a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
923 a->c = vou_dev->rect;
924
925 return 0;
926}
927
928/* Assume a dull encoder, do all the work ourselves. */
929static int sh_vou_s_crop(struct file *file, void *fh, struct v4l2_crop *a)
930{
931 struct video_device *vdev = video_devdata(file);
932 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
933 struct v4l2_rect *rect = &a->c;
934 struct v4l2_crop sd_crop = {.type = V4L2_BUF_TYPE_VIDEO_OUTPUT};
935 struct v4l2_pix_format *pix = &vou_dev->pix;
936 struct sh_vou_geometry geo;
937 struct v4l2_mbus_framefmt mbfmt = {
938 /* Revisit: is this the correct code? */
939 .code = V4L2_MBUS_FMT_YUYV8_2X8_LE,
940 .field = V4L2_FIELD_INTERLACED,
941 .colorspace = V4L2_COLORSPACE_SMPTE170M,
942 };
943 int ret;
944
945 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u@%u:%u\n", __func__,
946 rect->width, rect->height, rect->left, rect->top);
947
948 if (a->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
949 return -EINVAL;
950
951 v4l_bound_align_image(&rect->width, 0, VOU_MAX_IMAGE_WIDTH, 1,
952 &rect->height, 0, VOU_MAX_IMAGE_HEIGHT, 1, 0);
953
954 if (rect->width + rect->left > VOU_MAX_IMAGE_WIDTH)
955 rect->left = VOU_MAX_IMAGE_WIDTH - rect->width;
956
957 if (rect->height + rect->top > VOU_MAX_IMAGE_HEIGHT)
958 rect->top = VOU_MAX_IMAGE_HEIGHT - rect->height;
959
960 geo.output = *rect;
961 geo.in_width = pix->width;
962 geo.in_height = pix->height;
963
964 /* Configure the encoder one-to-one, position at 0, ignore errors */
965 sd_crop.c.width = geo.output.width;
966 sd_crop.c.height = geo.output.height;
967 /*
968 * We first issue a S_CROP, so that the subsequent S_FMT delivers the
969 * final encoder configuration.
970 */
971 v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
972 s_crop, &sd_crop);
973 mbfmt.width = geo.output.width;
974 mbfmt.height = geo.output.height;
975 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
976 s_mbus_fmt, &mbfmt);
977 /* Must be implemented, so, don't check for -ENOIOCTLCMD */
978 if (ret < 0)
979 return ret;
980
981 /* Sanity checks */
982 if ((unsigned)mbfmt.width > VOU_MAX_IMAGE_WIDTH ||
983 (unsigned)mbfmt.height > VOU_MAX_IMAGE_HEIGHT ||
984 mbfmt.code != V4L2_MBUS_FMT_YUYV8_2X8_LE)
985 return -EIO;
986
987 geo.output.width = mbfmt.width;
988 geo.output.height = mbfmt.height;
989
990 /*
991 * No down-scaling. According to the API, current call has precedence:
992 * http://v4l2spec.bytesex.org/spec/x1904.htm#AEN1954 paragraph two.
993 */
994 vou_adjust_input(&geo, vou_dev->std);
995
996 /* We tried to preserve output rectangle, but it could have changed */
997 vou_dev->rect = geo.output;
998 pix->width = geo.in_width;
999 pix->height = geo.in_height;
1000
1001 sh_vou_configure_geometry(vou_dev, vou_dev->pix_idx,
1002 geo.scale_idx_h, geo.scale_idx_v);
1003
1004 return 0;
1005}
1006
1007/*
1008 * Total field: NTSC 858 x 2 * 262/263, PAL 864 x 2 * 312/313, default rectangle
1009 * is the initial register values, height takes the interlaced format into
1010 * account. The actual image can only go up to 720 x 2 * 240, So, VOUVPR can
1011 * actually only meaningfully contain values <= 720 and <= 240 respectively, and
1012 * not <= 864 and <= 312.
1013 */
1014static int sh_vou_cropcap(struct file *file, void *priv,
1015 struct v4l2_cropcap *a)
1016{
1017 struct sh_vou_file *vou_file = priv;
1018
1019 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1020
1021 a->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1022 a->bounds.left = 0;
1023 a->bounds.top = 0;
1024 a->bounds.width = VOU_MAX_IMAGE_WIDTH;
1025 a->bounds.height = VOU_MAX_IMAGE_HEIGHT;
1026 /* Default = max, set VOUDPR = 0, which is not hardware default */
1027 a->defrect.left = 0;
1028 a->defrect.top = 0;
1029 a->defrect.width = VOU_MAX_IMAGE_WIDTH;
1030 a->defrect.height = VOU_MAX_IMAGE_HEIGHT;
1031 a->pixelaspect.numerator = 1;
1032 a->pixelaspect.denominator = 1;
1033
1034 return 0;
1035}
1036
1037static irqreturn_t sh_vou_isr(int irq, void *dev_id)
1038{
1039 struct sh_vou_device *vou_dev = dev_id;
1040 static unsigned long j;
1041 struct videobuf_buffer *vb;
1042 static int cnt;
1043 static int side;
1044 u32 irq_status = sh_vou_reg_a_read(vou_dev, VOUIR), masked;
1045 u32 vou_status = sh_vou_reg_a_read(vou_dev, VOUSTR);
1046
1047 if (!(irq_status & 0x300)) {
1048 if (printk_timed_ratelimit(&j, 500))
1049 dev_warn(vou_dev->v4l2_dev.dev, "IRQ status 0x%x!\n",
1050 irq_status);
1051 return IRQ_NONE;
1052 }
1053
1054 spin_lock(&vou_dev->lock);
1055 if (!vou_dev->active || list_empty(&vou_dev->queue)) {
1056 if (printk_timed_ratelimit(&j, 500))
1057 dev_warn(vou_dev->v4l2_dev.dev,
1058 "IRQ without active buffer: %x!\n", irq_status);
1059 /* Just ack: buf_release will disable further interrupts */
1060 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x300);
1061 spin_unlock(&vou_dev->lock);
1062 return IRQ_HANDLED;
1063 }
1064
1065 masked = ~(0x300 & irq_status) & irq_status & 0x30304;
1066 dev_dbg(vou_dev->v4l2_dev.dev,
1067 "IRQ status 0x%x -> 0x%x, VOU status 0x%x, cnt %d\n",
1068 irq_status, masked, vou_status, cnt);
1069
1070 cnt++;
1071 side = vou_status & 0x10000;
1072
1073 /* Clear only set interrupts */
1074 sh_vou_reg_a_write(vou_dev, VOUIR, masked);
1075
1076 vb = vou_dev->active;
1077 list_del(&vb->queue);
1078
1079 vb->state = VIDEOBUF_DONE;
1080 do_gettimeofday(&vb->ts);
1081 vb->field_count++;
1082 wake_up(&vb->done);
1083
1084 if (list_empty(&vou_dev->queue)) {
1085 /* Stop VOU */
1086 dev_dbg(vou_dev->v4l2_dev.dev, "%s: queue empty after %d\n",
1087 __func__, cnt);
1088 sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
1089 vou_dev->active = NULL;
1090 vou_dev->status = SH_VOU_INITIALISING;
1091 /* Disable End-of-Frame (VSYNC) interrupts */
1092 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
1093 spin_unlock(&vou_dev->lock);
1094 return IRQ_HANDLED;
1095 }
1096
1097 vou_dev->active = list_entry(vou_dev->queue.next,
1098 struct videobuf_buffer, queue);
1099
1100 if (vou_dev->active->queue.next != &vou_dev->queue) {
1101 struct videobuf_buffer *new = list_entry(vou_dev->active->queue.next,
1102 struct videobuf_buffer, queue);
1103 sh_vou_schedule_next(vou_dev, new);
1104 }
1105
1106 spin_unlock(&vou_dev->lock);
1107
1108 return IRQ_HANDLED;
1109}
1110
1111static int sh_vou_hw_init(struct sh_vou_device *vou_dev)
1112{
1113 struct sh_vou_pdata *pdata = vou_dev->pdata;
1114 u32 voucr = sh_vou_ntsc_mode(pdata->bus_fmt) << 29;
1115 int i = 100;
1116
1117 /* Disable all IRQs */
1118 sh_vou_reg_a_write(vou_dev, VOUIR, 0);
1119
1120 /* Reset VOU interfaces - registers unaffected */
1121 sh_vou_reg_a_write(vou_dev, VOUSRR, 0x101);
1122 while (--i && (sh_vou_reg_a_read(vou_dev, VOUSRR) & 0x101))
1123 udelay(1);
1124
1125 if (!i)
1126 return -ETIMEDOUT;
1127
1128 dev_dbg(vou_dev->v4l2_dev.dev, "Reset took %dus\n", 100 - i);
1129
1130 if (pdata->flags & SH_VOU_PCLK_FALLING)
1131 voucr |= 1 << 28;
1132 if (pdata->flags & SH_VOU_HSYNC_LOW)
1133 voucr |= 1 << 27;
1134 if (pdata->flags & SH_VOU_VSYNC_LOW)
1135 voucr |= 1 << 26;
1136 sh_vou_reg_ab_set(vou_dev, VOUCR, voucr, 0xfc000000);
1137
1138 /* Manual register side switching at first */
1139 sh_vou_reg_a_write(vou_dev, VOURCR, 4);
1140 /* Default - fixed HSYNC length, can be made configurable is required */
1141 sh_vou_reg_ab_write(vou_dev, VOUMSR, 0x800000);
1142
1143 return 0;
1144}
1145
1146/* File operations */
1147static int sh_vou_open(struct file *file)
1148{
1149 struct video_device *vdev = video_devdata(file);
1150 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1151 struct sh_vou_file *vou_file = kzalloc(sizeof(struct sh_vou_file),
1152 GFP_KERNEL);
1153
1154 if (!vou_file)
1155 return -ENOMEM;
1156
1157 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
1158
1159 file->private_data = vou_file;
1160
1161 if (atomic_inc_return(&vou_dev->use_count) == 1) {
1162 int ret;
1163 /* First open */
1164 vou_dev->status = SH_VOU_INITIALISING;
1165 pm_runtime_get_sync(vdev->v4l2_dev->dev);
1166 ret = sh_vou_hw_init(vou_dev);
1167 if (ret < 0) {
1168 atomic_dec(&vou_dev->use_count);
1169 pm_runtime_put(vdev->v4l2_dev->dev);
1170 vou_dev->status = SH_VOU_IDLE;
1171 return ret;
1172 }
1173 }
1174
1175 videobuf_queue_dma_contig_init(&vou_file->vbq, &sh_vou_video_qops,
1176 vou_dev->v4l2_dev.dev, &vou_dev->lock,
1177 V4L2_BUF_TYPE_VIDEO_OUTPUT,
1178 V4L2_FIELD_NONE,
1179 sizeof(struct videobuf_buffer), vdev);
1180
1181 return 0;
1182}
1183
1184static int sh_vou_release(struct file *file)
1185{
1186 struct video_device *vdev = video_devdata(file);
1187 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1188 struct sh_vou_file *vou_file = file->private_data;
1189
1190 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1191
1192 if (!atomic_dec_return(&vou_dev->use_count)) {
1193 /* Last close */
1194 vou_dev->status = SH_VOU_IDLE;
1195 sh_vou_reg_a_set(vou_dev, VOUER, 0, 0x101);
1196 pm_runtime_put(vdev->v4l2_dev->dev);
1197 }
1198
1199 file->private_data = NULL;
1200 kfree(vou_file);
1201
1202 return 0;
1203}
1204
1205static int sh_vou_mmap(struct file *file, struct vm_area_struct *vma)
1206{
1207 struct sh_vou_file *vou_file = file->private_data;
1208
1209 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1210
1211 return videobuf_mmap_mapper(&vou_file->vbq, vma);
1212}
1213
1214static unsigned int sh_vou_poll(struct file *file, poll_table *wait)
1215{
1216 struct sh_vou_file *vou_file = file->private_data;
1217
1218 dev_dbg(vou_file->vbq.dev, "%s()\n", __func__);
1219
1220 return videobuf_poll_stream(file, &vou_file->vbq, wait);
1221}
1222
1223static int sh_vou_g_chip_ident(struct file *file, void *fh,
1224 struct v4l2_dbg_chip_ident *id)
1225{
1226 struct video_device *vdev = video_devdata(file);
1227 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1228
1229 return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, g_chip_ident, id);
1230}
1231
1232#ifdef CONFIG_VIDEO_ADV_DEBUG
1233static int sh_vou_g_register(struct file *file, void *fh,
1234 struct v4l2_dbg_register *reg)
1235{
1236 struct video_device *vdev = video_devdata(file);
1237 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1238
1239 return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, g_register, reg);
1240}
1241
1242static int sh_vou_s_register(struct file *file, void *fh,
1243 struct v4l2_dbg_register *reg)
1244{
1245 struct video_device *vdev = video_devdata(file);
1246 struct sh_vou_device *vou_dev = video_get_drvdata(vdev);
1247
1248 return v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, core, s_register, reg);
1249}
1250#endif
1251
1252/* sh_vou display ioctl operations */
1253static const struct v4l2_ioctl_ops sh_vou_ioctl_ops = {
1254 .vidioc_querycap = sh_vou_querycap,
1255 .vidioc_enum_fmt_vid_out = sh_vou_enum_fmt_vid_out,
1256 .vidioc_g_fmt_vid_out = sh_vou_g_fmt_vid_out,
1257 .vidioc_s_fmt_vid_out = sh_vou_s_fmt_vid_out,
1258 .vidioc_try_fmt_vid_out = sh_vou_try_fmt_vid_out,
1259 .vidioc_reqbufs = sh_vou_reqbufs,
1260 .vidioc_querybuf = sh_vou_querybuf,
1261 .vidioc_qbuf = sh_vou_qbuf,
1262 .vidioc_dqbuf = sh_vou_dqbuf,
1263 .vidioc_streamon = sh_vou_streamon,
1264 .vidioc_streamoff = sh_vou_streamoff,
1265 .vidioc_s_std = sh_vou_s_std,
1266 .vidioc_g_std = sh_vou_g_std,
1267 .vidioc_cropcap = sh_vou_cropcap,
1268 .vidioc_g_crop = sh_vou_g_crop,
1269 .vidioc_s_crop = sh_vou_s_crop,
1270 .vidioc_g_chip_ident = sh_vou_g_chip_ident,
1271#ifdef CONFIG_VIDEO_ADV_DEBUG
1272 .vidioc_g_register = sh_vou_g_register,
1273 .vidioc_s_register = sh_vou_s_register,
1274#endif
1275};
1276
1277static const struct v4l2_file_operations sh_vou_fops = {
1278 .owner = THIS_MODULE,
1279 .open = sh_vou_open,
1280 .release = sh_vou_release,
1281 .ioctl = video_ioctl2,
1282 .mmap = sh_vou_mmap,
1283 .poll = sh_vou_poll,
1284};
1285
1286static const struct video_device sh_vou_video_template = {
1287 .name = "sh_vou",
1288 .fops = &sh_vou_fops,
1289 .ioctl_ops = &sh_vou_ioctl_ops,
1290 .tvnorms = V4L2_STD_525_60, /* PAL only supported in 8-bit non-bt656 mode */
1291 .current_norm = V4L2_STD_NTSC_M,
1292};
1293
1294static int __devinit sh_vou_probe(struct platform_device *pdev)
1295{
1296 struct sh_vou_pdata *vou_pdata = pdev->dev.platform_data;
1297 struct v4l2_rect *rect;
1298 struct v4l2_pix_format *pix;
1299 struct i2c_adapter *i2c_adap;
1300 struct video_device *vdev;
1301 struct sh_vou_device *vou_dev;
1302 struct resource *reg_res, *region;
1303 struct v4l2_subdev *subdev;
1304 int irq, ret;
1305
1306 reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1307 irq = platform_get_irq(pdev, 0);
1308
1309 if (!vou_pdata || !reg_res || irq <= 0) {
1310 dev_err(&pdev->dev, "Insufficient VOU platform information.\n");
1311 return -ENODEV;
1312 }
1313
1314 vou_dev = kzalloc(sizeof(*vou_dev), GFP_KERNEL);
1315 if (!vou_dev)
1316 return -ENOMEM;
1317
1318 INIT_LIST_HEAD(&vou_dev->queue);
1319 spin_lock_init(&vou_dev->lock);
1320 atomic_set(&vou_dev->use_count, 0);
1321 vou_dev->pdata = vou_pdata;
1322 vou_dev->status = SH_VOU_IDLE;
1323
1324 rect = &vou_dev->rect;
1325 pix = &vou_dev->pix;
1326
1327 /* Fill in defaults */
1328 vou_dev->std = sh_vou_video_template.current_norm;
1329 rect->left = 0;
1330 rect->top = 0;
1331 rect->width = VOU_MAX_IMAGE_WIDTH;
1332 rect->height = VOU_MAX_IMAGE_HEIGHT;
1333 pix->width = VOU_MAX_IMAGE_WIDTH;
1334 pix->height = VOU_MAX_IMAGE_HEIGHT;
1335 pix->pixelformat = V4L2_PIX_FMT_YVYU;
1336 pix->field = V4L2_FIELD_NONE;
1337 pix->bytesperline = VOU_MAX_IMAGE_WIDTH * 2;
1338 pix->sizeimage = VOU_MAX_IMAGE_WIDTH * 2 * VOU_MAX_IMAGE_HEIGHT;
1339 pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
1340
1341 region = request_mem_region(reg_res->start, resource_size(reg_res),
1342 pdev->name);
1343 if (!region) {
1344 dev_err(&pdev->dev, "VOU region already claimed\n");
1345 ret = -EBUSY;
1346 goto ereqmemreg;
1347 }
1348
1349 vou_dev->base = ioremap(reg_res->start, resource_size(reg_res));
1350 if (!vou_dev->base) {
1351 ret = -ENOMEM;
1352 goto emap;
1353 }
1354
1355 ret = request_irq(irq, sh_vou_isr, 0, "vou", vou_dev);
1356 if (ret < 0)
1357 goto ereqirq;
1358
1359 ret = v4l2_device_register(&pdev->dev, &vou_dev->v4l2_dev);
1360 if (ret < 0) {
1361 dev_err(&pdev->dev, "Error registering v4l2 device\n");
1362 goto ev4l2devreg;
1363 }
1364
1365 /* Allocate memory for video device */
1366 vdev = video_device_alloc();
1367 if (vdev == NULL) {
1368 ret = -ENOMEM;
1369 goto evdevalloc;
1370 }
1371
1372 *vdev = sh_vou_video_template;
1373 if (vou_pdata->bus_fmt == SH_VOU_BUS_8BIT)
1374 vdev->tvnorms |= V4L2_STD_PAL;
1375 vdev->v4l2_dev = &vou_dev->v4l2_dev;
1376 vdev->release = video_device_release;
1377
1378 vou_dev->vdev = vdev;
1379 video_set_drvdata(vdev, vou_dev);
1380
1381 pm_runtime_enable(&pdev->dev);
1382 pm_runtime_resume(&pdev->dev);
1383
1384 i2c_adap = i2c_get_adapter(vou_pdata->i2c_adap);
1385 if (!i2c_adap) {
1386 ret = -ENODEV;
1387 goto ei2cgadap;
1388 }
1389
1390 ret = sh_vou_hw_init(vou_dev);
1391 if (ret < 0)
1392 goto ereset;
1393
1394 subdev = v4l2_i2c_new_subdev_board(&vou_dev->v4l2_dev, i2c_adap,
1395 vou_pdata->module_name, vou_pdata->board_info, NULL);
1396 if (!subdev) {
1397 ret = -ENOMEM;
1398 goto ei2cnd;
1399 }
1400
1401 ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
1402 if (ret < 0)
1403 goto evregdev;
1404
1405 return 0;
1406
1407evregdev:
1408ei2cnd:
1409ereset:
1410 i2c_put_adapter(i2c_adap);
1411ei2cgadap:
1412 video_device_release(vdev);
1413 pm_runtime_disable(&pdev->dev);
1414evdevalloc:
1415 v4l2_device_unregister(&vou_dev->v4l2_dev);
1416ev4l2devreg:
1417 free_irq(irq, vou_dev);
1418ereqirq:
1419 iounmap(vou_dev->base);
1420emap:
1421 release_mem_region(reg_res->start, resource_size(reg_res));
1422ereqmemreg:
1423 kfree(vou_dev);
1424 return ret;
1425}
1426
1427static int __devexit sh_vou_remove(struct platform_device *pdev)
1428{
1429 int irq = platform_get_irq(pdev, 0);
1430 struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1431 struct sh_vou_device *vou_dev = container_of(v4l2_dev,
1432 struct sh_vou_device, v4l2_dev);
1433 struct v4l2_subdev *sd = list_entry(v4l2_dev->subdevs.next,
1434 struct v4l2_subdev, list);
1435 struct i2c_client *client = v4l2_get_subdevdata(sd);
1436 struct resource *reg_res;
1437
1438 if (irq > 0)
1439 free_irq(irq, vou_dev);
1440 pm_runtime_disable(&pdev->dev);
1441 video_unregister_device(vou_dev->vdev);
1442 i2c_put_adapter(client->adapter);
1443 v4l2_device_unregister(&vou_dev->v4l2_dev);
1444 iounmap(vou_dev->base);
1445 reg_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1446 if (reg_res)
1447 release_mem_region(reg_res->start, resource_size(reg_res));
1448 kfree(vou_dev);
1449 return 0;
1450}
1451
1452static struct platform_driver __refdata sh_vou = {
1453 .remove = __devexit_p(sh_vou_remove),
1454 .driver = {
1455 .name = "sh-vou",
1456 .owner = THIS_MODULE,
1457 },
1458};
1459
1460static int __init sh_vou_init(void)
1461{
1462 return platform_driver_probe(&sh_vou, sh_vou_probe);
1463}
1464
1465static void __exit sh_vou_exit(void)
1466{
1467 platform_driver_unregister(&sh_vou);
1468}
1469
1470module_init(sh_vou_init);
1471module_exit(sh_vou_exit);
1472
1473MODULE_DESCRIPTION("SuperH VOU driver");
1474MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1475MODULE_LICENSE("GPL v2");
1476MODULE_ALIAS("platform:sh-vou");
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-23 19:53:44 -0500