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V4L/DVB (10088): video: sh_mobile_ceu cleanups and comments
[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,
7a1a8164 104 unsigned long reg_offs, u32 data)
0d3244d6
MD		 105{
106 iowrite32(data, priv->base + reg_offs);
107}
108
7a1a8164 109static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
0d3244d6
MD		 110{
111 return ioread32(priv->base + reg_offs);
112}
113
114/*
115 * Videobuf operations
116 */
117static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq,
118 unsigned int *count,
119 unsigned int *size)
120{
121 struct soc_camera_device *icd = vq->priv_data;
122 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
123 struct sh_mobile_ceu_dev *pcdev = ici->priv;
124 int bytes_per_pixel = (icd->current_fmt->depth + 7) >> 3;
125
126 *size = PAGE_ALIGN(icd->width * icd->height * bytes_per_pixel);
127
128 if (0 == *count)
129 *count = 2;
130
131 if (pcdev->video_limit) {
132 while (*size * *count > pcdev->video_limit)
133 (*count)--;
134 }
135
136 dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size);
137
138 return 0;
139}
140
141static void free_buffer(struct videobuf_queue *vq,
142 struct sh_mobile_ceu_buffer *buf)
143{
144 struct soc_camera_device *icd = vq->priv_data;
145
86751b01 146 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
0d3244d6
MD		 147 &buf->vb, buf->vb.baddr, buf->vb.bsize);
148
149 if (in_interrupt())
150 BUG();
151
152 videobuf_dma_contig_free(vq, &buf->vb);
153 dev_dbg(&icd->dev, "%s freed\n", __func__);
154 buf->vb.state = VIDEOBUF_NEEDS_INIT;
155}
156
7a1a8164
MD		 157#define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
158#define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
159#define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
160#define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
161
162
0d3244d6
MD		 163static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
164{
8be65dc5 165 struct soc_camera_device *icd = pcdev->icd;
7a1a8164
MD		 166 dma_addr_t phys_addr;
167
168 /* The hardware is _very_ picky about this sequence. Especially
169 * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
170 * several not-so-well documented interrupt sources in CETCR.
171 */
172 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_CPEIE);
173 ceu_write(pcdev, CETCR, ~ceu_read(pcdev, CETCR) & CEU_CETCR_MAGIC);
174 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_CPEIE);
175 ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
176 ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
0d3244d6 177
8be65dc5
MD		 178 if (!pcdev->active)
179 return;
180
181 phys_addr = videobuf_to_dma_contig(pcdev->active);
182 ceu_write(pcdev, CDAYR, phys_addr);
183
184 switch (icd->current_fmt->fourcc) {
185 case V4L2_PIX_FMT_NV12:
186 case V4L2_PIX_FMT_NV21:
9e4a56d2
MD		 187 case V4L2_PIX_FMT_NV16:
188 case V4L2_PIX_FMT_NV61:
7a1a8164 189 phys_addr += icd->width * icd->height;
8be65dc5 190 ceu_write(pcdev, CDACR, phys_addr);
0d3244d6 191 }
8be65dc5
MD		 192
193 pcdev->active->state = VIDEOBUF_ACTIVE;
194 ceu_write(pcdev, CAPSR, 0x1); /* start capture */
0d3244d6
MD		 195}
196
197static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq,
198 struct videobuf_buffer *vb,
199 enum v4l2_field field)
200{
201 struct soc_camera_device *icd = vq->priv_data;
202 struct sh_mobile_ceu_buffer *buf;
203 int ret;
204
205 buf = container_of(vb, struct sh_mobile_ceu_buffer, vb);
206
86751b01 207 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
0d3244d6
MD		 208 vb, vb->baddr, vb->bsize);
209
210 /* Added list head initialization on alloc */
211 WARN_ON(!list_empty(&vb->queue));
212
213#ifdef DEBUG
214 /* This can be useful if you want to see if we actually fill
215 * the buffer with something */
216 memset((void *)vb->baddr, 0xaa, vb->bsize);
217#endif
218
219 BUG_ON(NULL == icd->current_fmt);
220
221 if (buf->fmt != icd->current_fmt ||
222 vb->width != icd->width ||
223 vb->height != icd->height ||
224 vb->field != field) {
225 buf->fmt = icd->current_fmt;
226 vb->width = icd->width;
227 vb->height = icd->height;
228 vb->field = field;
229 vb->state = VIDEOBUF_NEEDS_INIT;
230 }
231
232 vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3);
233 if (0 != vb->baddr && vb->bsize < vb->size) {
234 ret = -EINVAL;
235 goto out;
236 }
237
238 if (vb->state == VIDEOBUF_NEEDS_INIT) {
239 ret = videobuf_iolock(vq, vb, NULL);
240 if (ret)
241 goto fail;
242 vb->state = VIDEOBUF_PREPARED;
243 }
244
245 return 0;
246fail:
247 free_buffer(vq, buf);
248out:
249 return ret;
250}
251
252static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq,
253 struct videobuf_buffer *vb)
254{
255 struct soc_camera_device *icd = vq->priv_data;
256 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
257 struct sh_mobile_ceu_dev *pcdev = ici->priv;
258 unsigned long flags;
259
86751b01 260 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
0d3244d6
MD		 261 vb, vb->baddr, vb->bsize);
262
51354cc3 263 vb->state = VIDEOBUF_QUEUED;
0d3244d6
MD		 264 spin_lock_irqsave(&pcdev->lock, flags);
265 list_add_tail(&vb->queue, &pcdev->capture);
266
267 if (!pcdev->active) {
268 pcdev->active = vb;
269 sh_mobile_ceu_capture(pcdev);
270 }
271
272 spin_unlock_irqrestore(&pcdev->lock, flags);
273}
274
275static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq,
276 struct videobuf_buffer *vb)
277{
278 free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb));
279}
280
281static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = {
282 .buf_setup = sh_mobile_ceu_videobuf_setup,
283 .buf_prepare = sh_mobile_ceu_videobuf_prepare,
284 .buf_queue = sh_mobile_ceu_videobuf_queue,
285 .buf_release = sh_mobile_ceu_videobuf_release,
286};
287
288static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
289{
290 struct sh_mobile_ceu_dev *pcdev = data;
291 struct videobuf_buffer *vb;
292 unsigned long flags;
293
294 spin_lock_irqsave(&pcdev->lock, flags);
295
296 vb = pcdev->active;
297 list_del_init(&vb->queue);
298
299 if (!list_empty(&pcdev->capture))
300 pcdev->active = list_entry(pcdev->capture.next,
301 struct videobuf_buffer, queue);
302 else
303 pcdev->active = NULL;
304
305 sh_mobile_ceu_capture(pcdev);
306
307 vb->state = VIDEOBUF_DONE;
308 do_gettimeofday(&vb->ts);
309 vb->field_count++;
310 wake_up(&vb->done);
311 spin_unlock_irqrestore(&pcdev->lock, flags);
312
313 return IRQ_HANDLED;
314}
315
1c3bb743 316/* Called with .video_lock held */
0d3244d6
MD		 317static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
318{
319 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
320 struct sh_mobile_ceu_dev *pcdev = ici->priv;
321 int ret = -EBUSY;
322
0d3244d6
MD		 323 if (pcdev->icd)
324 goto err;
325
326 dev_info(&icd->dev,
327 "SuperH Mobile CEU driver attached to camera %d\n",
328 icd->devnum);
329
0d3244d6
MD		 330 ret = icd->ops->init(icd);
331 if (ret)
332 goto err;
333
a42b6dd6
MD		 334 clk_enable(pcdev->clk);
335
0d3244d6
MD		 336 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
337 while (ceu_read(pcdev, CSTSR) & 1)
338 msleep(1);
339
340 pcdev->icd = icd;
341err:
0d3244d6
MD		 342 return ret;
343}
344
1c3bb743 345/* Called with .video_lock held */
0d3244d6
MD		 346static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
347{
348 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
349 struct sh_mobile_ceu_dev *pcdev = ici->priv;
51354cc3 350 unsigned long flags;
0d3244d6
MD		 351
352 BUG_ON(icd != pcdev->icd);
353
354 /* disable capture, disable interrupts */
355 ceu_write(pcdev, CEIER, 0);
356 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
51354cc3
MD		 357
358 /* make sure active buffer is canceled */
359 spin_lock_irqsave(&pcdev->lock, flags);
360 if (pcdev->active) {
361 list_del(&pcdev->active->queue);
362 pcdev->active->state = VIDEOBUF_ERROR;
363 wake_up_all(&pcdev->active->done);
364 pcdev->active = NULL;
365 }
366 spin_unlock_irqrestore(&pcdev->lock, flags);
367
a42b6dd6
MD		 368 clk_disable(pcdev->clk);
369
0d3244d6 370 icd->ops->release(icd);
0d3244d6
MD		 371
372 dev_info(&icd->dev,
373 "SuperH Mobile CEU driver detached from camera %d\n",
374 icd->devnum);
375
376 pcdev->icd = NULL;
377}
378
379static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
380 __u32 pixfmt)
381{
382 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
383 struct sh_mobile_ceu_dev *pcdev = ici->priv;
384 int ret, buswidth, width, cfszr_width, cdwdr_width;
385 unsigned long camera_flags, common_flags, value;
8be65dc5 386 int yuv_mode, yuv_lineskip;
0d3244d6
MD		 387
388 camera_flags = icd->ops->query_bus_param(icd);
389 common_flags = soc_camera_bus_param_compatible(camera_flags,
390 pcdev->pdata->flags);
391 if (!common_flags)
392 return -EINVAL;
393
394 ret = icd->ops->set_bus_param(icd, common_flags);
395 if (ret < 0)
396 return ret;
397
398 switch (common_flags & SOCAM_DATAWIDTH_MASK) {
399 case SOCAM_DATAWIDTH_8:
400 buswidth = 8;
401 break;
402 case SOCAM_DATAWIDTH_16:
403 buswidth = 16;
404 break;
405 default:
406 return -EINVAL;
407 }
408
409 ceu_write(pcdev, CRCNTR, 0);
410 ceu_write(pcdev, CRCMPR, 0);
411
8be65dc5
MD		 412 value = 0x00000010; /* data fetch by default */
413 yuv_mode = yuv_lineskip = 0;
414
415 switch (icd->current_fmt->fourcc) {
416 case V4L2_PIX_FMT_NV12:
417 case V4L2_PIX_FMT_NV21:
418 yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */
9e4a56d2
MD		 419 /* fall-through */
420 case V4L2_PIX_FMT_NV16:
421 case V4L2_PIX_FMT_NV61:
8be65dc5
MD		 422 yuv_mode = 1;
423 switch (pcdev->camera_fmt->fourcc) {
424 case V4L2_PIX_FMT_UYVY:
425 value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
426 break;
427 case V4L2_PIX_FMT_VYUY:
428 value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
429 break;
430 case V4L2_PIX_FMT_YUYV:
431 value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
432 break;
433 case V4L2_PIX_FMT_YVYU:
434 value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
435 break;
436 default:
437 BUG();
438 }
439 }
440
7a1a8164
MD		 441 if (icd->current_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
442 icd->current_fmt->fourcc == V4L2_PIX_FMT_NV61)
9e4a56d2 443 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
8be65dc5 444
7a1a8164
MD		 445 value |= common_flags & SOCAM_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
446 value |= common_flags & SOCAM_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
447 value |= buswidth == 16 ? 1 << 12 : 0;
0d3244d6
MD		 448 ceu_write(pcdev, CAMCR, value);
449
450 ceu_write(pcdev, CAPCR, 0x00300000);
451 ceu_write(pcdev, CAIFR, 0);
452
453 mdelay(1);
454
8be65dc5
MD		 455 if (yuv_mode) {
456 width = icd->width * 2;
7a1a8164 457 width = buswidth == 16 ? width / 2 : width;
8be65dc5
MD		 458 cfszr_width = cdwdr_width = icd->width;
459 } else {
460 width = icd->width * ((icd->current_fmt->depth + 7) >> 3);
7a1a8164
MD		 461 width = buswidth == 16 ? width / 2 : width;
462 cfszr_width = buswidth == 8 ? width / 2 : width;
463 cdwdr_width = buswidth == 16 ? width * 2 : width;
8be65dc5 464 }
0d3244d6
MD		 465
466 ceu_write(pcdev, CAMOR, 0);
467 ceu_write(pcdev, CAPWR, (icd->height << 16) | width);
8be65dc5 468 ceu_write(pcdev, CFLCR, 0); /* no scaling */
0d3244d6 469 ceu_write(pcdev, CFSZR, (icd->height << 16) | cfszr_width);
8be65dc5 470 ceu_write(pcdev, CLFCR, 0); /* no lowpass filter */
dd54203b
MD		 471
472 /* A few words about byte order (observed in Big Endian mode)
473 *
474 * In data fetch mode bytes are received in chunks of 8 bytes.
475 * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
476 *
477 * The data is however by default written to memory in reverse order:
478 * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
479 *
480 * The lowest three bits of CDOCR allows us to do swapping,
2c0a072e
MD		 481 * using 7 we swap the data bytes to match the incoming order:
482 * D0, D1, D2, D3, D4, D5, D6, D7
dd54203b 483 */
8be65dc5
MD		 484 value = 0x00000017;
485 if (yuv_lineskip)
486 value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
487
488 ceu_write(pcdev, CDOCR, value);
0d3244d6
MD		 489
490 ceu_write(pcdev, CDWDR, cdwdr_width);
491 ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
492
493 /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
0d3244d6
MD		 494 return 0;
495}
496
9414de39 497static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd)
0d3244d6
MD		 498{
499 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
500 struct sh_mobile_ceu_dev *pcdev = ici->priv;
501 unsigned long camera_flags, common_flags;
502
503 camera_flags = icd->ops->query_bus_param(icd);
504 common_flags = soc_camera_bus_param_compatible(camera_flags,
505 pcdev->pdata->flags);
506 if (!common_flags)
507 return -EINVAL;
508
509 return 0;
510}
511
8be65dc5
MD		 512static const struct soc_camera_data_format sh_mobile_ceu_formats[] = {
513 {
514 .name = "NV12",
515 .depth = 12,
516 .fourcc = V4L2_PIX_FMT_NV12,
517 .colorspace = V4L2_COLORSPACE_JPEG,
518 },
519 {
520 .name = "NV21",
521 .depth = 12,
522 .fourcc = V4L2_PIX_FMT_NV21,
523 .colorspace = V4L2_COLORSPACE_JPEG,
524 },
9e4a56d2
MD		 525 {
526 .name = "NV16",
527 .depth = 16,
528 .fourcc = V4L2_PIX_FMT_NV16,
529 .colorspace = V4L2_COLORSPACE_JPEG,
530 },
531 {
532 .name = "NV61",
533 .depth = 16,
534 .fourcc = V4L2_PIX_FMT_NV61,
535 .colorspace = V4L2_COLORSPACE_JPEG,
536 },
8be65dc5
MD		 537};
538
9414de39
MD		 539static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, int idx,
540 struct soc_camera_format_xlate *xlate)
541{
542 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
8be65dc5 543 int ret, k, n;
9414de39
MD		 544 int formats = 0;
545
546 ret = sh_mobile_ceu_try_bus_param(icd);
547 if (ret < 0)
548 return 0;
549
550 switch (icd->formats[idx].fourcc) {
8be65dc5
MD		 551 case V4L2_PIX_FMT_UYVY:
552 case V4L2_PIX_FMT_VYUY:
553 case V4L2_PIX_FMT_YUYV:
554 case V4L2_PIX_FMT_YVYU:
555 n = ARRAY_SIZE(sh_mobile_ceu_formats);
556 formats += n;
557 for (k = 0; xlate && k < n; k++) {
558 xlate->host_fmt = &sh_mobile_ceu_formats[k];
559 xlate->cam_fmt = icd->formats + idx;
560 xlate->buswidth = icd->formats[idx].depth;
561 xlate++;
562 dev_dbg(&ici->dev, "Providing format %s using %s\n",
563 sh_mobile_ceu_formats[k].name,
564 icd->formats[idx].name);
565 }
9414de39
MD		 566 default:
567 /* Generic pass-through */
568 formats++;
569 if (xlate) {
570 xlate->host_fmt = icd->formats + idx;
571 xlate->cam_fmt = icd->formats + idx;
572 xlate->buswidth = icd->formats[idx].depth;
573 xlate++;
574 dev_dbg(&ici->dev,
575 "Providing format %s in pass-through mode\n",
576 icd->formats[idx].name);
577 }
578 }
579
580 return formats;
581}
582
d8fac217
GL		 583static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
584 __u32 pixfmt, struct v4l2_rect *rect)
0d3244d6 585{
9414de39 586 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
8be65dc5 587 struct sh_mobile_ceu_dev *pcdev = ici->priv;
9414de39 588 const struct soc_camera_format_xlate *xlate;
25c4d74e
GL		 589 int ret;
590
9414de39
MD		 591 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
592 if (!xlate) {
593 dev_warn(&ici->dev, "Format %x not found\n", pixfmt);
594 return -EINVAL;
25c4d74e
GL		 595 }
596
9414de39
MD		 597 switch (pixfmt) {
598 case 0: /* Only geometry change */
599 ret = icd->ops->set_fmt(icd, pixfmt, rect);
600 break;
601 default:
602 ret = icd->ops->set_fmt(icd, xlate->cam_fmt->fourcc, rect);
603 }
604
605 if (pixfmt && !ret) {
606 icd->buswidth = xlate->buswidth;
607 icd->current_fmt = xlate->host_fmt;
8be65dc5 608 pcdev->camera_fmt = xlate->cam_fmt;
9414de39 609 }
25c4d74e
GL		 610
611 return ret;
0d3244d6
MD		 612}
613
d8fac217
GL		 614static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
615 struct v4l2_format *f)
0d3244d6 616{
9414de39
MD		 617 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
618 const struct soc_camera_format_xlate *xlate;
619 __u32 pixfmt = f->fmt.pix.pixelformat;
a2c8c68c 620
9414de39
MD		 621 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
622 if (!xlate) {
623 dev_warn(&ici->dev, "Format %x not found\n", pixfmt);
25c4d74e 624 return -EINVAL;
9414de39 625 }
25c4d74e 626
0d3244d6
MD		 627 /* FIXME: calculate using depth and bus width */
628
629 if (f->fmt.pix.height < 4)
630 f->fmt.pix.height = 4;
631 if (f->fmt.pix.height > 1920)
632 f->fmt.pix.height = 1920;
633 if (f->fmt.pix.width < 2)
634 f->fmt.pix.width = 2;
635 if (f->fmt.pix.width > 2560)
636 f->fmt.pix.width = 2560;
637 f->fmt.pix.width &= ~0x01;
638 f->fmt.pix.height &= ~0x03;
639
25c4d74e 640 f->fmt.pix.bytesperline = f->fmt.pix.width *
9414de39 641 DIV_ROUND_UP(xlate->host_fmt->depth, 8);
25c4d74e
GL		 642 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
643
0d3244d6 644 /* limit to sensor capabilities */
d8fac217 645 return icd->ops->try_fmt(icd, f);
0d3244d6
MD		 646}
647
648static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf,
649 struct v4l2_requestbuffers *p)
650{
651 int i;
652
653 /* This is for locking debugging only. I removed spinlocks and now I
654 * check whether .prepare is ever called on a linked buffer, or whether
655 * a dma IRQ can occur for an in-work or unlinked buffer. Until now
656 * it hadn't triggered */
657 for (i = 0; i < p->count; i++) {
658 struct sh_mobile_ceu_buffer *buf;
659
660 buf = container_of(icf->vb_vidq.bufs[i],
661 struct sh_mobile_ceu_buffer, vb);
662 INIT_LIST_HEAD(&buf->vb.queue);
663 }
664
665 return 0;
666}
667
668static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
669{
670 struct soc_camera_file *icf = file->private_data;
671 struct sh_mobile_ceu_buffer *buf;
672
673 buf = list_entry(icf->vb_vidq.stream.next,
674 struct sh_mobile_ceu_buffer, vb.stream);
675
676 poll_wait(file, &buf->vb.done, pt);
677
678 if (buf->vb.state == VIDEOBUF_DONE ||
679 buf->vb.state == VIDEOBUF_ERROR)
680 return POLLIN|POLLRDNORM;
681
682 return 0;
683}
684
685static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
686 struct v4l2_capability *cap)
687{
688 strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
689 cap->version = KERNEL_VERSION(0, 0, 5);
690 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
691 return 0;
692}
693
694static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q,
695 struct soc_camera_device *icd)
696{
697 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
698 struct sh_mobile_ceu_dev *pcdev = ici->priv;
699
700 videobuf_queue_dma_contig_init(q,
701 &sh_mobile_ceu_videobuf_ops,
702 &ici->dev, &pcdev->lock,
703 V4L2_BUF_TYPE_VIDEO_CAPTURE,
704 V4L2_FIELD_NONE,
705 sizeof(struct sh_mobile_ceu_buffer),
706 icd);
707}
708
709static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
710 .owner = THIS_MODULE,
711 .add = sh_mobile_ceu_add_device,
712 .remove = sh_mobile_ceu_remove_device,
9414de39 713 .get_formats = sh_mobile_ceu_get_formats,
d8fac217
GL		 714 .set_fmt = sh_mobile_ceu_set_fmt,
715 .try_fmt = sh_mobile_ceu_try_fmt,
0d3244d6
MD		 716 .reqbufs = sh_mobile_ceu_reqbufs,
717 .poll = sh_mobile_ceu_poll,
718 .querycap = sh_mobile_ceu_querycap,
0d3244d6
MD		 719 .set_bus_param = sh_mobile_ceu_set_bus_param,
720 .init_videobuf = sh_mobile_ceu_init_videobuf,
721};
722
723static int sh_mobile_ceu_probe(struct platform_device *pdev)
724{
725 struct sh_mobile_ceu_dev *pcdev;
726 struct resource *res;
727 void __iomem *base;
a42b6dd6 728 char clk_name[8];
0d3244d6
MD		 729 unsigned int irq;
730 int err = 0;
731
732 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
733 irq = platform_get_irq(pdev, 0);
734 if (!res || !irq) {
735 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
736 err = -ENODEV;
737 goto exit;
738 }
739
740 pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
741 if (!pcdev) {
742 dev_err(&pdev->dev, "Could not allocate pcdev\n");
743 err = -ENOMEM;
744 goto exit;
745 }
746
747 platform_set_drvdata(pdev, pcdev);
748 INIT_LIST_HEAD(&pcdev->capture);
749 spin_lock_init(&pcdev->lock);
750
751 pcdev->pdata = pdev->dev.platform_data;
752 if (!pcdev->pdata) {
753 err = -EINVAL;
754 dev_err(&pdev->dev, "CEU platform data not set.\n");
755 goto exit_kfree;
756 }
757
758 base = ioremap_nocache(res->start, res->end - res->start + 1);
759 if (!base) {
760 err = -ENXIO;
761 dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
762 goto exit_kfree;
763 }
764
765 pcdev->irq = irq;
766 pcdev->base = base;
767 pcdev->video_limit = 0; /* only enabled if second resource exists */
768 pcdev->dev = &pdev->dev;
769
770 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
771 if (res) {
772 err = dma_declare_coherent_memory(&pdev->dev, res->start,
773 res->start,
774 (res->end - res->start) + 1,
775 DMA_MEMORY_MAP |
776 DMA_MEMORY_EXCLUSIVE);
777 if (!err) {
778 dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
779 err = -ENXIO;
780 goto exit_iounmap;
781 }
782
783 pcdev->video_limit = (res->end - res->start) + 1;
784 }
785
786 /* request irq */
787 err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
af128a10 788 dev_name(&pdev->dev), pcdev);
0d3244d6
MD		 789 if (err) {
790 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
791 goto exit_release_mem;
792 }
793
a42b6dd6
MD		 794 snprintf(clk_name, sizeof(clk_name), "ceu%d", pdev->id);
795 pcdev->clk = clk_get(&pdev->dev, clk_name);
796 if (IS_ERR(pcdev->clk)) {
797 dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
798 err = PTR_ERR(pcdev->clk);
799 goto exit_free_irq;
800 }
801
0d3244d6
MD		 802 pcdev->ici.priv = pcdev;
803 pcdev->ici.dev.parent = &pdev->dev;
804 pcdev->ici.nr = pdev->id;
af128a10
KS		 805 pcdev->ici.drv_name = dev_name(&pdev->dev);
806 pcdev->ici.ops = &sh_mobile_ceu_host_ops;
0d3244d6
MD		 807
808 err = soc_camera_host_register(&pcdev->ici);
809 if (err)
a42b6dd6 810 goto exit_free_clk;
0d3244d6
MD		 811
812 return 0;
813
a42b6dd6
MD		 814exit_free_clk:
815 clk_put(pcdev->clk);
0d3244d6
MD		 816exit_free_irq:
817 free_irq(pcdev->irq, pcdev);
818exit_release_mem:
819 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
820 dma_release_declared_memory(&pdev->dev);
821exit_iounmap:
822 iounmap(base);
823exit_kfree:
824 kfree(pcdev);
825exit:
826 return err;
827}
828
829static int sh_mobile_ceu_remove(struct platform_device *pdev)
830{
831 struct sh_mobile_ceu_dev *pcdev = platform_get_drvdata(pdev);
832
833 soc_camera_host_unregister(&pcdev->ici);
a42b6dd6 834 clk_put(pcdev->clk);
0d3244d6
MD		 835 free_irq(pcdev->irq, pcdev);
836 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
837 dma_release_declared_memory(&pdev->dev);
838 iounmap(pcdev->base);
839 kfree(pcdev);
840 return 0;
841}
842
843static struct platform_driver sh_mobile_ceu_driver = {
844 .driver = {
845 .name = "sh_mobile_ceu",
846 },
847 .probe = sh_mobile_ceu_probe,
848 .remove = sh_mobile_ceu_remove,
849};
850
851static int __init sh_mobile_ceu_init(void)
852{
853 return platform_driver_register(&sh_mobile_ceu_driver);
854}
855
856static void __exit sh_mobile_ceu_exit(void)
857{
01c1e4ca 858 platform_driver_unregister(&sh_mobile_ceu_driver);
0d3244d6
MD		 859}
860
861module_init(sh_mobile_ceu_init);
862module_exit(sh_mobile_ceu_exit);
863
864MODULE_DESCRIPTION("SuperH Mobile CEU driver");
865MODULE_AUTHOR("Magnus Damm");
866MODULE_LICENSE("GPL");