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V4L/DVB (10084): sh_mobile_ceu: add NV12 and NV21 support
[GitHub/moto-9609/android_kernel_motorola_exynos9610.git] / drivers / media / video / sh_mobile_ceu_camera.c
CommitLineData
0d3244d6
MD		 1/*
2 * V4L2 Driver for SuperH Mobile CEU interface
3 *
4 * Copyright (C) 2008 Magnus Damm
5 *
6 * Based on V4L2 Driver for PXA camera host - "pxa_camera.c",
7 *
8 * Copyright (C) 2006, Sascha Hauer, Pengutronix
9 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 */
16
17#include <linux/init.h>
18#include <linux/module.h>
19#include <linux/io.h>
20#include <linux/delay.h>
21#include <linux/dma-mapping.h>
22#include <linux/errno.h>
23#include <linux/fs.h>
24#include <linux/interrupt.h>
25#include <linux/kernel.h>
26#include <linux/mm.h>
27#include <linux/moduleparam.h>
28#include <linux/time.h>
29#include <linux/version.h>
30#include <linux/device.h>
31#include <linux/platform_device.h>
0d3244d6 32#include <linux/videodev2.h>
a42b6dd6 33#include <linux/clk.h>
0d3244d6
MD		 34
35#include <media/v4l2-common.h>
36#include <media/v4l2-dev.h>
37#include <media/soc_camera.h>
38#include <media/sh_mobile_ceu.h>
39#include <media/videobuf-dma-contig.h>
40
41/* register offsets for sh7722 / sh7723 */
42
dd54203b
MD		 43#define CAPSR 0x00 /* Capture start register */
44#define CAPCR 0x04 /* Capture control register */
45#define CAMCR 0x08 /* Capture interface control register */
46#define CMCYR 0x0c /* Capture interface cycle register */
47#define CAMOR 0x10 /* Capture interface offset register */
48#define CAPWR 0x14 /* Capture interface width register */
49#define CAIFR 0x18 /* Capture interface input format register */
50#define CSTCR 0x20 /* Camera strobe control register (<= sh7722) */
51#define CSECR 0x24 /* Camera strobe emission count register (<= sh7722) */
52#define CRCNTR 0x28 /* CEU register control register */
53#define CRCMPR 0x2c /* CEU register forcible control register */
54#define CFLCR 0x30 /* Capture filter control register */
55#define CFSZR 0x34 /* Capture filter size clip register */
56#define CDWDR 0x38 /* Capture destination width register */
57#define CDAYR 0x3c /* Capture data address Y register */
58#define CDACR 0x40 /* Capture data address C register */
59#define CDBYR 0x44 /* Capture data bottom-field address Y register */
60#define CDBCR 0x48 /* Capture data bottom-field address C register */
61#define CBDSR 0x4c /* Capture bundle destination size register */
62#define CFWCR 0x5c /* Firewall operation control register */
63#define CLFCR 0x60 /* Capture low-pass filter control register */
64#define CDOCR 0x64 /* Capture data output control register */
65#define CDDCR 0x68 /* Capture data complexity level register */
66#define CDDAR 0x6c /* Capture data complexity level address register */
67#define CEIER 0x70 /* Capture event interrupt enable register */
68#define CETCR 0x74 /* Capture event flag clear register */
69#define CSTSR 0x7c /* Capture status register */
70#define CSRTR 0x80 /* Capture software reset register */
71#define CDSSR 0x84 /* Capture data size register */
72#define CDAYR2 0x90 /* Capture data address Y register 2 */
73#define CDACR2 0x94 /* Capture data address C register 2 */
74#define CDBYR2 0x98 /* Capture data bottom-field address Y register 2 */
75#define CDBCR2 0x9c /* Capture data bottom-field address C register 2 */
0d3244d6 76
0d3244d6
MD		 77/* per video frame buffer */
78struct sh_mobile_ceu_buffer {
79 struct videobuf_buffer vb; /* v4l buffer must be first */
80 const struct soc_camera_data_format *fmt;
81};
82
83struct sh_mobile_ceu_dev {
84 struct device *dev;
85 struct soc_camera_host ici;
86 struct soc_camera_device *icd;
87
88 unsigned int irq;
89 void __iomem *base;
a42b6dd6 90 struct clk *clk;
0d3244d6
MD		 91 unsigned long video_limit;
92
c60f2b5c 93 /* lock used to protect videobuf */
0d3244d6
MD		 94 spinlock_t lock;
95 struct list_head capture;
96 struct videobuf_buffer *active;
97
98 struct sh_mobile_ceu_info *pdata;
8be65dc5
MD		 99
100 const struct soc_camera_data_format *camera_fmt;
0d3244d6
MD		 101};
102
103static void ceu_write(struct sh_mobile_ceu_dev *priv,
104 unsigned long reg_offs, unsigned long data)
105{
106 iowrite32(data, priv->base + reg_offs);
107}
108
109static unsigned long ceu_read(struct sh_mobile_ceu_dev *priv,
110 unsigned long reg_offs)
111{
112 return ioread32(priv->base + reg_offs);
113}
114
115/*
116 * Videobuf operations
117 */
118static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq,
119 unsigned int *count,
120 unsigned int *size)
121{
122 struct soc_camera_device *icd = vq->priv_data;
123 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
124 struct sh_mobile_ceu_dev *pcdev = ici->priv;
125 int bytes_per_pixel = (icd->current_fmt->depth + 7) >> 3;
126
127 *size = PAGE_ALIGN(icd->width * icd->height * bytes_per_pixel);
128
129 if (0 == *count)
130 *count = 2;
131
132 if (pcdev->video_limit) {
133 while (*size * *count > pcdev->video_limit)
134 (*count)--;
135 }
136
137 dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size);
138
139 return 0;
140}
141
142static void free_buffer(struct videobuf_queue *vq,
143 struct sh_mobile_ceu_buffer *buf)
144{
145 struct soc_camera_device *icd = vq->priv_data;
146
86751b01 147 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
0d3244d6
MD		 148 &buf->vb, buf->vb.baddr, buf->vb.bsize);
149
150 if (in_interrupt())
151 BUG();
152
153 videobuf_dma_contig_free(vq, &buf->vb);
154 dev_dbg(&icd->dev, "%s freed\n", __func__);
155 buf->vb.state = VIDEOBUF_NEEDS_INIT;
156}
157
158static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
159{
8be65dc5
MD		 160 struct soc_camera_device *icd = pcdev->icd;
161 unsigned long phys_addr;
162
0d3244d6
MD		 163 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~1);
164 ceu_write(pcdev, CETCR, ~ceu_read(pcdev, CETCR) & 0x0317f313);
165 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | 1);
166
167 ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~0x10000);
168
169 ceu_write(pcdev, CETCR, 0x0317f313 ^ 0x10);
170
8be65dc5
MD		 171 if (!pcdev->active)
172 return;
173
174 phys_addr = videobuf_to_dma_contig(pcdev->active);
175 ceu_write(pcdev, CDAYR, phys_addr);
176
177 switch (icd->current_fmt->fourcc) {
178 case V4L2_PIX_FMT_NV12:
179 case V4L2_PIX_FMT_NV21:
180 phys_addr += (icd->width * icd->height);
181 ceu_write(pcdev, CDACR, phys_addr);
0d3244d6 182 }
8be65dc5
MD		 183
184 pcdev->active->state = VIDEOBUF_ACTIVE;
185 ceu_write(pcdev, CAPSR, 0x1); /* start capture */
0d3244d6
MD		 186}
187
188static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq,
189 struct videobuf_buffer *vb,
190 enum v4l2_field field)
191{
192 struct soc_camera_device *icd = vq->priv_data;
193 struct sh_mobile_ceu_buffer *buf;
194 int ret;
195
196 buf = container_of(vb, struct sh_mobile_ceu_buffer, vb);
197
86751b01 198 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
0d3244d6
MD		 199 vb, vb->baddr, vb->bsize);
200
201 /* Added list head initialization on alloc */
202 WARN_ON(!list_empty(&vb->queue));
203
204#ifdef DEBUG
205 /* This can be useful if you want to see if we actually fill
206 * the buffer with something */
207 memset((void *)vb->baddr, 0xaa, vb->bsize);
208#endif
209
210 BUG_ON(NULL == icd->current_fmt);
211
212 if (buf->fmt != icd->current_fmt ||
213 vb->width != icd->width ||
214 vb->height != icd->height ||
215 vb->field != field) {
216 buf->fmt = icd->current_fmt;
217 vb->width = icd->width;
218 vb->height = icd->height;
219 vb->field = field;
220 vb->state = VIDEOBUF_NEEDS_INIT;
221 }
222
223 vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3);
224 if (0 != vb->baddr && vb->bsize < vb->size) {
225 ret = -EINVAL;
226 goto out;
227 }
228
229 if (vb->state == VIDEOBUF_NEEDS_INIT) {
230 ret = videobuf_iolock(vq, vb, NULL);
231 if (ret)
232 goto fail;
233 vb->state = VIDEOBUF_PREPARED;
234 }
235
236 return 0;
237fail:
238 free_buffer(vq, buf);
239out:
240 return ret;
241}
242
243static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq,
244 struct videobuf_buffer *vb)
245{
246 struct soc_camera_device *icd = vq->priv_data;
247 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
248 struct sh_mobile_ceu_dev *pcdev = ici->priv;
249 unsigned long flags;
250
86751b01 251 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
0d3244d6
MD		 252 vb, vb->baddr, vb->bsize);
253
51354cc3 254 vb->state = VIDEOBUF_QUEUED;
0d3244d6
MD		 255 spin_lock_irqsave(&pcdev->lock, flags);
256 list_add_tail(&vb->queue, &pcdev->capture);
257
258 if (!pcdev->active) {
259 pcdev->active = vb;
260 sh_mobile_ceu_capture(pcdev);
261 }
262
263 spin_unlock_irqrestore(&pcdev->lock, flags);
264}
265
266static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq,
267 struct videobuf_buffer *vb)
268{
269 free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb));
270}
271
272static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = {
273 .buf_setup = sh_mobile_ceu_videobuf_setup,
274 .buf_prepare = sh_mobile_ceu_videobuf_prepare,
275 .buf_queue = sh_mobile_ceu_videobuf_queue,
276 .buf_release = sh_mobile_ceu_videobuf_release,
277};
278
279static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
280{
281 struct sh_mobile_ceu_dev *pcdev = data;
282 struct videobuf_buffer *vb;
283 unsigned long flags;
284
285 spin_lock_irqsave(&pcdev->lock, flags);
286
287 vb = pcdev->active;
288 list_del_init(&vb->queue);
289
290 if (!list_empty(&pcdev->capture))
291 pcdev->active = list_entry(pcdev->capture.next,
292 struct videobuf_buffer, queue);
293 else
294 pcdev->active = NULL;
295
296 sh_mobile_ceu_capture(pcdev);
297
298 vb->state = VIDEOBUF_DONE;
299 do_gettimeofday(&vb->ts);
300 vb->field_count++;
301 wake_up(&vb->done);
302 spin_unlock_irqrestore(&pcdev->lock, flags);
303
304 return IRQ_HANDLED;
305}
306
1c3bb743 307/* Called with .video_lock held */
0d3244d6
MD		 308static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
309{
310 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
311 struct sh_mobile_ceu_dev *pcdev = ici->priv;
312 int ret = -EBUSY;
313
0d3244d6
MD		 314 if (pcdev->icd)
315 goto err;
316
317 dev_info(&icd->dev,
318 "SuperH Mobile CEU driver attached to camera %d\n",
319 icd->devnum);
320
0d3244d6
MD		 321 ret = icd->ops->init(icd);
322 if (ret)
323 goto err;
324
a42b6dd6
MD		 325 clk_enable(pcdev->clk);
326
0d3244d6
MD		 327 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
328 while (ceu_read(pcdev, CSTSR) & 1)
329 msleep(1);
330
331 pcdev->icd = icd;
332err:
0d3244d6
MD		 333 return ret;
334}
335
1c3bb743 336/* Called with .video_lock held */
0d3244d6
MD		 337static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
338{
339 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
340 struct sh_mobile_ceu_dev *pcdev = ici->priv;
51354cc3 341 unsigned long flags;
0d3244d6
MD		 342
343 BUG_ON(icd != pcdev->icd);
344
345 /* disable capture, disable interrupts */
346 ceu_write(pcdev, CEIER, 0);
347 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
51354cc3
MD		 348
349 /* make sure active buffer is canceled */
350 spin_lock_irqsave(&pcdev->lock, flags);
351 if (pcdev->active) {
352 list_del(&pcdev->active->queue);
353 pcdev->active->state = VIDEOBUF_ERROR;
354 wake_up_all(&pcdev->active->done);
355 pcdev->active = NULL;
356 }
357 spin_unlock_irqrestore(&pcdev->lock, flags);
358
a42b6dd6
MD		 359 clk_disable(pcdev->clk);
360
0d3244d6 361 icd->ops->release(icd);
0d3244d6
MD		 362
363 dev_info(&icd->dev,
364 "SuperH Mobile CEU driver detached from camera %d\n",
365 icd->devnum);
366
367 pcdev->icd = NULL;
368}
369
370static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
371 __u32 pixfmt)
372{
373 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
374 struct sh_mobile_ceu_dev *pcdev = ici->priv;
375 int ret, buswidth, width, cfszr_width, cdwdr_width;
376 unsigned long camera_flags, common_flags, value;
8be65dc5 377 int yuv_mode, yuv_lineskip;
0d3244d6
MD		 378
379 camera_flags = icd->ops->query_bus_param(icd);
380 common_flags = soc_camera_bus_param_compatible(camera_flags,
381 pcdev->pdata->flags);
382 if (!common_flags)
383 return -EINVAL;
384
385 ret = icd->ops->set_bus_param(icd, common_flags);
386 if (ret < 0)
387 return ret;
388
389 switch (common_flags & SOCAM_DATAWIDTH_MASK) {
390 case SOCAM_DATAWIDTH_8:
391 buswidth = 8;
392 break;
393 case SOCAM_DATAWIDTH_16:
394 buswidth = 16;
395 break;
396 default:
397 return -EINVAL;
398 }
399
400 ceu_write(pcdev, CRCNTR, 0);
401 ceu_write(pcdev, CRCMPR, 0);
402
8be65dc5
MD		 403 value = 0x00000010; /* data fetch by default */
404 yuv_mode = yuv_lineskip = 0;
405
406 switch (icd->current_fmt->fourcc) {
407 case V4L2_PIX_FMT_NV12:
408 case V4L2_PIX_FMT_NV21:
409 yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */
410 yuv_mode = 1;
411 switch (pcdev->camera_fmt->fourcc) {
412 case V4L2_PIX_FMT_UYVY:
413 value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
414 break;
415 case V4L2_PIX_FMT_VYUY:
416 value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
417 break;
418 case V4L2_PIX_FMT_YUYV:
419 value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
420 break;
421 case V4L2_PIX_FMT_YVYU:
422 value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
423 break;
424 default:
425 BUG();
426 }
427 }
428
429 if (icd->current_fmt->fourcc == V4L2_PIX_FMT_NV21)
430 value ^= 0x00000100; /* swap U, V to change from NV12->NV21 */
431
0d3244d6
MD		 432 value |= (common_flags & SOCAM_VSYNC_ACTIVE_LOW) ? (1 << 1) : 0;
433 value |= (common_flags & SOCAM_HSYNC_ACTIVE_LOW) ? (1 << 0) : 0;
434 value |= (buswidth == 16) ? (1 << 12) : 0;
435 ceu_write(pcdev, CAMCR, value);
436
437 ceu_write(pcdev, CAPCR, 0x00300000);
438 ceu_write(pcdev, CAIFR, 0);
439
440 mdelay(1);
441
8be65dc5
MD		 442 if (yuv_mode) {
443 width = icd->width * 2;
444 width = (buswidth == 16) ? width / 2 : width;
445 cfszr_width = cdwdr_width = icd->width;
446 } else {
447 width = icd->width * ((icd->current_fmt->depth + 7) >> 3);
448 width = (buswidth == 16) ? width / 2 : width;
449 cfszr_width = (buswidth == 8) ? width / 2 : width;
450 cdwdr_width = (buswidth == 16) ? width * 2 : width;
451 }
0d3244d6
MD		 452
453 ceu_write(pcdev, CAMOR, 0);
454 ceu_write(pcdev, CAPWR, (icd->height << 16) | width);
8be65dc5 455 ceu_write(pcdev, CFLCR, 0); /* no scaling */
0d3244d6 456 ceu_write(pcdev, CFSZR, (icd->height << 16) | cfszr_width);
8be65dc5 457 ceu_write(pcdev, CLFCR, 0); /* no lowpass filter */
dd54203b
MD		 458
459 /* A few words about byte order (observed in Big Endian mode)
460 *
461 * In data fetch mode bytes are received in chunks of 8 bytes.
462 * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
463 *
464 * The data is however by default written to memory in reverse order:
465 * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
466 *
467 * The lowest three bits of CDOCR allows us to do swapping,
2c0a072e
MD		 468 * using 7 we swap the data bytes to match the incoming order:
469 * D0, D1, D2, D3, D4, D5, D6, D7
dd54203b 470 */
8be65dc5
MD		 471 value = 0x00000017;
472 if (yuv_lineskip)
473 value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
474
475 ceu_write(pcdev, CDOCR, value);
0d3244d6
MD		 476
477 ceu_write(pcdev, CDWDR, cdwdr_width);
478 ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
479
480 /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
0d3244d6
MD		 481 return 0;
482}
483
9414de39 484static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd)
0d3244d6
MD		 485{
486 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
487 struct sh_mobile_ceu_dev *pcdev = ici->priv;
488 unsigned long camera_flags, common_flags;
489
490 camera_flags = icd->ops->query_bus_param(icd);
491 common_flags = soc_camera_bus_param_compatible(camera_flags,
492 pcdev->pdata->flags);
493 if (!common_flags)
494 return -EINVAL;
495
496 return 0;
497}
498
8be65dc5
MD		 499static const struct soc_camera_data_format sh_mobile_ceu_formats[] = {
500 {
501 .name = "NV12",
502 .depth = 12,
503 .fourcc = V4L2_PIX_FMT_NV12,
504 .colorspace = V4L2_COLORSPACE_JPEG,
505 },
506 {
507 .name = "NV21",
508 .depth = 12,
509 .fourcc = V4L2_PIX_FMT_NV21,
510 .colorspace = V4L2_COLORSPACE_JPEG,
511 },
512};
513
9414de39
MD		 514static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, int idx,
515 struct soc_camera_format_xlate *xlate)
516{
517 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
8be65dc5 518 int ret, k, n;
9414de39
MD		 519 int formats = 0;
520
521 ret = sh_mobile_ceu_try_bus_param(icd);
522 if (ret < 0)
523 return 0;
524
525 switch (icd->formats[idx].fourcc) {
8be65dc5
MD		 526 case V4L2_PIX_FMT_UYVY:
527 case V4L2_PIX_FMT_VYUY:
528 case V4L2_PIX_FMT_YUYV:
529 case V4L2_PIX_FMT_YVYU:
530 n = ARRAY_SIZE(sh_mobile_ceu_formats);
531 formats += n;
532 for (k = 0; xlate && k < n; k++) {
533 xlate->host_fmt = &sh_mobile_ceu_formats[k];
534 xlate->cam_fmt = icd->formats + idx;
535 xlate->buswidth = icd->formats[idx].depth;
536 xlate++;
537 dev_dbg(&ici->dev, "Providing format %s using %s\n",
538 sh_mobile_ceu_formats[k].name,
539 icd->formats[idx].name);
540 }
9414de39
MD		 541 default:
542 /* Generic pass-through */
543 formats++;
544 if (xlate) {
545 xlate->host_fmt = icd->formats + idx;
546 xlate->cam_fmt = icd->formats + idx;
547 xlate->buswidth = icd->formats[idx].depth;
548 xlate++;
549 dev_dbg(&ici->dev,
550 "Providing format %s in pass-through mode\n",
551 icd->formats[idx].name);
552 }
553 }
554
555 return formats;
556}
557
d8fac217
GL		 558static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
559 __u32 pixfmt, struct v4l2_rect *rect)
0d3244d6 560{
9414de39 561 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
8be65dc5 562 struct sh_mobile_ceu_dev *pcdev = ici->priv;
9414de39 563 const struct soc_camera_format_xlate *xlate;
25c4d74e
GL		 564 int ret;
565
9414de39
MD		 566 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
567 if (!xlate) {
568 dev_warn(&ici->dev, "Format %x not found\n", pixfmt);
569 return -EINVAL;
25c4d74e
GL		 570 }
571
9414de39
MD		 572 switch (pixfmt) {
573 case 0: /* Only geometry change */
574 ret = icd->ops->set_fmt(icd, pixfmt, rect);
575 break;
576 default:
577 ret = icd->ops->set_fmt(icd, xlate->cam_fmt->fourcc, rect);
578 }
579
580 if (pixfmt && !ret) {
581 icd->buswidth = xlate->buswidth;
582 icd->current_fmt = xlate->host_fmt;
8be65dc5 583 pcdev->camera_fmt = xlate->cam_fmt;
9414de39 584 }
25c4d74e
GL		 585
586 return ret;
0d3244d6
MD		 587}
588
d8fac217
GL		 589static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
590 struct v4l2_format *f)
0d3244d6 591{
9414de39
MD		 592 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
593 const struct soc_camera_format_xlate *xlate;
594 __u32 pixfmt = f->fmt.pix.pixelformat;
a2c8c68c 595
9414de39
MD		 596 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
597 if (!xlate) {
598 dev_warn(&ici->dev, "Format %x not found\n", pixfmt);
25c4d74e 599 return -EINVAL;
9414de39 600 }
25c4d74e 601
0d3244d6
MD		 602 /* FIXME: calculate using depth and bus width */
603
604 if (f->fmt.pix.height < 4)
605 f->fmt.pix.height = 4;
606 if (f->fmt.pix.height > 1920)
607 f->fmt.pix.height = 1920;
608 if (f->fmt.pix.width < 2)
609 f->fmt.pix.width = 2;
610 if (f->fmt.pix.width > 2560)
611 f->fmt.pix.width = 2560;
612 f->fmt.pix.width &= ~0x01;
613 f->fmt.pix.height &= ~0x03;
614
25c4d74e 615 f->fmt.pix.bytesperline = f->fmt.pix.width *
9414de39 616 DIV_ROUND_UP(xlate->host_fmt->depth, 8);
25c4d74e
GL		 617 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
618
0d3244d6 619 /* limit to sensor capabilities */
d8fac217 620 return icd->ops->try_fmt(icd, f);
0d3244d6
MD		 621}
622
623static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf,
624 struct v4l2_requestbuffers *p)
625{
626 int i;
627
628 /* This is for locking debugging only. I removed spinlocks and now I
629 * check whether .prepare is ever called on a linked buffer, or whether
630 * a dma IRQ can occur for an in-work or unlinked buffer. Until now
631 * it hadn't triggered */
632 for (i = 0; i < p->count; i++) {
633 struct sh_mobile_ceu_buffer *buf;
634
635 buf = container_of(icf->vb_vidq.bufs[i],
636 struct sh_mobile_ceu_buffer, vb);
637 INIT_LIST_HEAD(&buf->vb.queue);
638 }
639
640 return 0;
641}
642
643static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
644{
645 struct soc_camera_file *icf = file->private_data;
646 struct sh_mobile_ceu_buffer *buf;
647
648 buf = list_entry(icf->vb_vidq.stream.next,
649 struct sh_mobile_ceu_buffer, vb.stream);
650
651 poll_wait(file, &buf->vb.done, pt);
652
653 if (buf->vb.state == VIDEOBUF_DONE ||
654 buf->vb.state == VIDEOBUF_ERROR)
655 return POLLIN|POLLRDNORM;
656
657 return 0;
658}
659
660static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
661 struct v4l2_capability *cap)
662{
663 strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
664 cap->version = KERNEL_VERSION(0, 0, 5);
665 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
666 return 0;
667}
668
669static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q,
670 struct soc_camera_device *icd)
671{
672 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
673 struct sh_mobile_ceu_dev *pcdev = ici->priv;
674
675 videobuf_queue_dma_contig_init(q,
676 &sh_mobile_ceu_videobuf_ops,
677 &ici->dev, &pcdev->lock,
678 V4L2_BUF_TYPE_VIDEO_CAPTURE,
679 V4L2_FIELD_NONE,
680 sizeof(struct sh_mobile_ceu_buffer),
681 icd);
682}
683
684static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
685 .owner = THIS_MODULE,
686 .add = sh_mobile_ceu_add_device,
687 .remove = sh_mobile_ceu_remove_device,
9414de39 688 .get_formats = sh_mobile_ceu_get_formats,
d8fac217
GL		 689 .set_fmt = sh_mobile_ceu_set_fmt,
690 .try_fmt = sh_mobile_ceu_try_fmt,
0d3244d6
MD		 691 .reqbufs = sh_mobile_ceu_reqbufs,
692 .poll = sh_mobile_ceu_poll,
693 .querycap = sh_mobile_ceu_querycap,
0d3244d6
MD		 694 .set_bus_param = sh_mobile_ceu_set_bus_param,
695 .init_videobuf = sh_mobile_ceu_init_videobuf,
696};
697
698static int sh_mobile_ceu_probe(struct platform_device *pdev)
699{
700 struct sh_mobile_ceu_dev *pcdev;
701 struct resource *res;
702 void __iomem *base;
a42b6dd6 703 char clk_name[8];
0d3244d6
MD		 704 unsigned int irq;
705 int err = 0;
706
707 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
708 irq = platform_get_irq(pdev, 0);
709 if (!res || !irq) {
710 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
711 err = -ENODEV;
712 goto exit;
713 }
714
715 pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
716 if (!pcdev) {
717 dev_err(&pdev->dev, "Could not allocate pcdev\n");
718 err = -ENOMEM;
719 goto exit;
720 }
721
722 platform_set_drvdata(pdev, pcdev);
723 INIT_LIST_HEAD(&pcdev->capture);
724 spin_lock_init(&pcdev->lock);
725
726 pcdev->pdata = pdev->dev.platform_data;
727 if (!pcdev->pdata) {
728 err = -EINVAL;
729 dev_err(&pdev->dev, "CEU platform data not set.\n");
730 goto exit_kfree;
731 }
732
733 base = ioremap_nocache(res->start, res->end - res->start + 1);
734 if (!base) {
735 err = -ENXIO;
736 dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
737 goto exit_kfree;
738 }
739
740 pcdev->irq = irq;
741 pcdev->base = base;
742 pcdev->video_limit = 0; /* only enabled if second resource exists */
743 pcdev->dev = &pdev->dev;
744
745 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
746 if (res) {
747 err = dma_declare_coherent_memory(&pdev->dev, res->start,
748 res->start,
749 (res->end - res->start) + 1,
750 DMA_MEMORY_MAP |
751 DMA_MEMORY_EXCLUSIVE);
752 if (!err) {
753 dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
754 err = -ENXIO;
755 goto exit_iounmap;
756 }
757
758 pcdev->video_limit = (res->end - res->start) + 1;
759 }
760
761 /* request irq */
762 err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
af128a10 763 dev_name(&pdev->dev), pcdev);
0d3244d6
MD		 764 if (err) {
765 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
766 goto exit_release_mem;
767 }
768
a42b6dd6
MD		 769 snprintf(clk_name, sizeof(clk_name), "ceu%d", pdev->id);
770 pcdev->clk = clk_get(&pdev->dev, clk_name);
771 if (IS_ERR(pcdev->clk)) {
772 dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
773 err = PTR_ERR(pcdev->clk);
774 goto exit_free_irq;
775 }
776
0d3244d6
MD		 777 pcdev->ici.priv = pcdev;
778 pcdev->ici.dev.parent = &pdev->dev;
779 pcdev->ici.nr = pdev->id;
af128a10
KS		 780 pcdev->ici.drv_name = dev_name(&pdev->dev);
781 pcdev->ici.ops = &sh_mobile_ceu_host_ops;
0d3244d6
MD		 782
783 err = soc_camera_host_register(&pcdev->ici);
784 if (err)
a42b6dd6 785 goto exit_free_clk;
0d3244d6
MD		 786
787 return 0;
788
a42b6dd6
MD		 789exit_free_clk:
790 clk_put(pcdev->clk);
0d3244d6
MD		 791exit_free_irq:
792 free_irq(pcdev->irq, pcdev);
793exit_release_mem:
794 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
795 dma_release_declared_memory(&pdev->dev);
796exit_iounmap:
797 iounmap(base);
798exit_kfree:
799 kfree(pcdev);
800exit:
801 return err;
802}
803
804static int sh_mobile_ceu_remove(struct platform_device *pdev)
805{
806 struct sh_mobile_ceu_dev *pcdev = platform_get_drvdata(pdev);
807
808 soc_camera_host_unregister(&pcdev->ici);
a42b6dd6 809 clk_put(pcdev->clk);
0d3244d6
MD		 810 free_irq(pcdev->irq, pcdev);
811 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
812 dma_release_declared_memory(&pdev->dev);
813 iounmap(pcdev->base);
814 kfree(pcdev);
815 return 0;
816}
817
818static struct platform_driver sh_mobile_ceu_driver = {
819 .driver = {
820 .name = "sh_mobile_ceu",
821 },
822 .probe = sh_mobile_ceu_probe,
823 .remove = sh_mobile_ceu_remove,
824};
825
826static int __init sh_mobile_ceu_init(void)
827{
828 return platform_driver_register(&sh_mobile_ceu_driver);
829}
830
831static void __exit sh_mobile_ceu_exit(void)
832{
01c1e4ca 833 platform_driver_unregister(&sh_mobile_ceu_driver);
0d3244d6
MD		 834}
835
836module_init(sh_mobile_ceu_init);
837module_exit(sh_mobile_ceu_exit);
838
839MODULE_DESCRIPTION("SuperH Mobile CEU driver");
840MODULE_AUTHOR("Magnus Damm");
841MODULE_LICENSE("GPL");