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V4L/DVB (10671): sh_mobile_ceu: SOCAM flags are not platform dependent
[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;
ccab8a29 97 int is_interlace;
0d3244d6
MD		 98
99 struct sh_mobile_ceu_info *pdata;
8be65dc5
MD		 100
101 const struct soc_camera_data_format *camera_fmt;
0d3244d6
MD		 102};
103
c354b400
KM		 104static unsigned long make_bus_param(struct sh_mobile_ceu_dev *pcdev)
105{
106 unsigned long flags;
107
108 flags = SOCAM_MASTER |
109 SOCAM_PCLK_SAMPLE_RISING |
110 SOCAM_HSYNC_ACTIVE_HIGH |
111 SOCAM_HSYNC_ACTIVE_LOW |
112 SOCAM_VSYNC_ACTIVE_HIGH |
113 SOCAM_VSYNC_ACTIVE_LOW |
114 SOCAM_DATA_ACTIVE_HIGH;
115
116 if (pcdev->pdata->flags & SH_CEU_FLAG_USE_8BIT_BUS)
117 flags |= SOCAM_DATAWIDTH_8;
118
119 if (pcdev->pdata->flags & SH_CEU_FLAG_USE_16BIT_BUS)
120 flags |= SOCAM_DATAWIDTH_16;
121
122 if (flags & SOCAM_DATAWIDTH_MASK)
123 return flags;
124
125 return 0;
126}
127
0d3244d6 128static void ceu_write(struct sh_mobile_ceu_dev *priv,
7a1a8164 129 unsigned long reg_offs, u32 data)
0d3244d6
MD		 130{
131 iowrite32(data, priv->base + reg_offs);
132}
133
7a1a8164 134static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
0d3244d6
MD		 135{
136 return ioread32(priv->base + reg_offs);
137}
138
139/*
140 * Videobuf operations
141 */
142static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq,
143 unsigned int *count,
144 unsigned int *size)
145{
146 struct soc_camera_device *icd = vq->priv_data;
147 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
148 struct sh_mobile_ceu_dev *pcdev = ici->priv;
149 int bytes_per_pixel = (icd->current_fmt->depth + 7) >> 3;
150
151 *size = PAGE_ALIGN(icd->width * icd->height * bytes_per_pixel);
152
153 if (0 == *count)
154 *count = 2;
155
156 if (pcdev->video_limit) {
157 while (*size * *count > pcdev->video_limit)
158 (*count)--;
159 }
160
161 dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size);
162
163 return 0;
164}
165
166static void free_buffer(struct videobuf_queue *vq,
167 struct sh_mobile_ceu_buffer *buf)
168{
169 struct soc_camera_device *icd = vq->priv_data;
170
86751b01 171 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
0d3244d6
MD		 172 &buf->vb, buf->vb.baddr, buf->vb.bsize);
173
174 if (in_interrupt())
175 BUG();
176
177 videobuf_dma_contig_free(vq, &buf->vb);
178 dev_dbg(&icd->dev, "%s freed\n", __func__);
179 buf->vb.state = VIDEOBUF_NEEDS_INIT;
180}
181
7a1a8164
MD		 182#define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
183#define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
184#define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
185#define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
186
187
0d3244d6
MD		 188static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
189{
8be65dc5 190 struct soc_camera_device *icd = pcdev->icd;
ccab8a29 191 dma_addr_t phys_addr_top, phys_addr_bottom;
7a1a8164
MD		 192
193 /* The hardware is _very_ picky about this sequence. Especially
194 * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
195 * several not-so-well documented interrupt sources in CETCR.
196 */
197 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_CPEIE);
198 ceu_write(pcdev, CETCR, ~ceu_read(pcdev, CETCR) & CEU_CETCR_MAGIC);
199 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_CPEIE);
200 ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
201 ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
0d3244d6 202
8be65dc5
MD		 203 if (!pcdev->active)
204 return;
205
ccab8a29
KM		 206 phys_addr_top = videobuf_to_dma_contig(pcdev->active);
207 ceu_write(pcdev, CDAYR, phys_addr_top);
208 if (pcdev->is_interlace) {
209 phys_addr_bottom = phys_addr_top + icd->width;
210 ceu_write(pcdev, CDBYR, phys_addr_bottom);
211 }
8be65dc5
MD		 212
213 switch (icd->current_fmt->fourcc) {
214 case V4L2_PIX_FMT_NV12:
215 case V4L2_PIX_FMT_NV21:
9e4a56d2
MD		 216 case V4L2_PIX_FMT_NV16:
217 case V4L2_PIX_FMT_NV61:
ccab8a29
KM		 218 phys_addr_top += icd->width * icd->height;
219 ceu_write(pcdev, CDACR, phys_addr_top);
220 if (pcdev->is_interlace) {
221 phys_addr_bottom = phys_addr_top + icd->width;
222 ceu_write(pcdev, CDBCR, phys_addr_bottom);
223 }
0d3244d6 224 }
8be65dc5
MD		 225
226 pcdev->active->state = VIDEOBUF_ACTIVE;
227 ceu_write(pcdev, CAPSR, 0x1); /* start capture */
0d3244d6
MD		 228}
229
230static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq,
231 struct videobuf_buffer *vb,
232 enum v4l2_field field)
233{
234 struct soc_camera_device *icd = vq->priv_data;
235 struct sh_mobile_ceu_buffer *buf;
236 int ret;
237
238 buf = container_of(vb, struct sh_mobile_ceu_buffer, vb);
239
86751b01 240 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
0d3244d6
MD		 241 vb, vb->baddr, vb->bsize);
242
243 /* Added list head initialization on alloc */
244 WARN_ON(!list_empty(&vb->queue));
245
246#ifdef DEBUG
247 /* This can be useful if you want to see if we actually fill
248 * the buffer with something */
249 memset((void *)vb->baddr, 0xaa, vb->bsize);
250#endif
251
252 BUG_ON(NULL == icd->current_fmt);
253
254 if (buf->fmt != icd->current_fmt ||
255 vb->width != icd->width ||
256 vb->height != icd->height ||
257 vb->field != field) {
258 buf->fmt = icd->current_fmt;
259 vb->width = icd->width;
260 vb->height = icd->height;
261 vb->field = field;
262 vb->state = VIDEOBUF_NEEDS_INIT;
263 }
264
265 vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3);
266 if (0 != vb->baddr && vb->bsize < vb->size) {
267 ret = -EINVAL;
268 goto out;
269 }
270
271 if (vb->state == VIDEOBUF_NEEDS_INIT) {
272 ret = videobuf_iolock(vq, vb, NULL);
273 if (ret)
274 goto fail;
275 vb->state = VIDEOBUF_PREPARED;
276 }
277
278 return 0;
279fail:
280 free_buffer(vq, buf);
281out:
282 return ret;
283}
284
285static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq,
286 struct videobuf_buffer *vb)
287{
288 struct soc_camera_device *icd = vq->priv_data;
289 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
290 struct sh_mobile_ceu_dev *pcdev = ici->priv;
291 unsigned long flags;
292
86751b01 293 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
0d3244d6
MD		 294 vb, vb->baddr, vb->bsize);
295
51354cc3 296 vb->state = VIDEOBUF_QUEUED;
0d3244d6
MD		 297 spin_lock_irqsave(&pcdev->lock, flags);
298 list_add_tail(&vb->queue, &pcdev->capture);
299
300 if (!pcdev->active) {
301 pcdev->active = vb;
302 sh_mobile_ceu_capture(pcdev);
303 }
304
305 spin_unlock_irqrestore(&pcdev->lock, flags);
306}
307
308static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq,
309 struct videobuf_buffer *vb)
310{
311 free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb));
312}
313
314static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = {
315 .buf_setup = sh_mobile_ceu_videobuf_setup,
316 .buf_prepare = sh_mobile_ceu_videobuf_prepare,
317 .buf_queue = sh_mobile_ceu_videobuf_queue,
318 .buf_release = sh_mobile_ceu_videobuf_release,
319};
320
321static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
322{
323 struct sh_mobile_ceu_dev *pcdev = data;
324 struct videobuf_buffer *vb;
325 unsigned long flags;
326
327 spin_lock_irqsave(&pcdev->lock, flags);
328
329 vb = pcdev->active;
330 list_del_init(&vb->queue);
331
332 if (!list_empty(&pcdev->capture))
333 pcdev->active = list_entry(pcdev->capture.next,
334 struct videobuf_buffer, queue);
335 else
336 pcdev->active = NULL;
337
338 sh_mobile_ceu_capture(pcdev);
339
340 vb->state = VIDEOBUF_DONE;
341 do_gettimeofday(&vb->ts);
342 vb->field_count++;
343 wake_up(&vb->done);
344 spin_unlock_irqrestore(&pcdev->lock, flags);
345
346 return IRQ_HANDLED;
347}
348
1c3bb743 349/* Called with .video_lock held */
0d3244d6
MD		 350static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
351{
352 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
353 struct sh_mobile_ceu_dev *pcdev = ici->priv;
354 int ret = -EBUSY;
355
0d3244d6
MD		 356 if (pcdev->icd)
357 goto err;
358
359 dev_info(&icd->dev,
360 "SuperH Mobile CEU driver attached to camera %d\n",
361 icd->devnum);
362
0d3244d6
MD		 363 ret = icd->ops->init(icd);
364 if (ret)
365 goto err;
366
a42b6dd6
MD		 367 clk_enable(pcdev->clk);
368
0d3244d6
MD		 369 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
370 while (ceu_read(pcdev, CSTSR) & 1)
371 msleep(1);
372
373 pcdev->icd = icd;
374err:
0d3244d6
MD		 375 return ret;
376}
377
1c3bb743 378/* Called with .video_lock held */
0d3244d6
MD		 379static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
380{
381 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
382 struct sh_mobile_ceu_dev *pcdev = ici->priv;
51354cc3 383 unsigned long flags;
0d3244d6
MD		 384
385 BUG_ON(icd != pcdev->icd);
386
387 /* disable capture, disable interrupts */
388 ceu_write(pcdev, CEIER, 0);
389 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
51354cc3
MD		 390
391 /* make sure active buffer is canceled */
392 spin_lock_irqsave(&pcdev->lock, flags);
393 if (pcdev->active) {
394 list_del(&pcdev->active->queue);
395 pcdev->active->state = VIDEOBUF_ERROR;
396 wake_up_all(&pcdev->active->done);
397 pcdev->active = NULL;
398 }
399 spin_unlock_irqrestore(&pcdev->lock, flags);
400
a42b6dd6
MD		 401 clk_disable(pcdev->clk);
402
0d3244d6 403 icd->ops->release(icd);
0d3244d6
MD		 404
405 dev_info(&icd->dev,
406 "SuperH Mobile CEU driver detached from camera %d\n",
407 icd->devnum);
408
409 pcdev->icd = NULL;
410}
411
412static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
413 __u32 pixfmt)
414{
415 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
416 struct sh_mobile_ceu_dev *pcdev = ici->priv;
ccab8a29 417 int ret, buswidth, width, height, cfszr_width, cdwdr_width;
0d3244d6 418 unsigned long camera_flags, common_flags, value;
8be65dc5 419 int yuv_mode, yuv_lineskip;
0d3244d6
MD		 420
421 camera_flags = icd->ops->query_bus_param(icd);
422 common_flags = soc_camera_bus_param_compatible(camera_flags,
c354b400 423 make_bus_param(pcdev));
0d3244d6
MD		 424 if (!common_flags)
425 return -EINVAL;
426
427 ret = icd->ops->set_bus_param(icd, common_flags);
428 if (ret < 0)
429 return ret;
430
431 switch (common_flags & SOCAM_DATAWIDTH_MASK) {
432 case SOCAM_DATAWIDTH_8:
433 buswidth = 8;
434 break;
435 case SOCAM_DATAWIDTH_16:
436 buswidth = 16;
437 break;
438 default:
439 return -EINVAL;
440 }
441
442 ceu_write(pcdev, CRCNTR, 0);
443 ceu_write(pcdev, CRCMPR, 0);
444
8be65dc5
MD		 445 value = 0x00000010; /* data fetch by default */
446 yuv_mode = yuv_lineskip = 0;
447
448 switch (icd->current_fmt->fourcc) {
449 case V4L2_PIX_FMT_NV12:
450 case V4L2_PIX_FMT_NV21:
451 yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */
9e4a56d2
MD		 452 /* fall-through */
453 case V4L2_PIX_FMT_NV16:
454 case V4L2_PIX_FMT_NV61:
8be65dc5
MD		 455 yuv_mode = 1;
456 switch (pcdev->camera_fmt->fourcc) {
457 case V4L2_PIX_FMT_UYVY:
458 value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
459 break;
460 case V4L2_PIX_FMT_VYUY:
461 value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
462 break;
463 case V4L2_PIX_FMT_YUYV:
464 value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
465 break;
466 case V4L2_PIX_FMT_YVYU:
467 value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
468 break;
469 default:
470 BUG();
471 }
472 }
473
7a1a8164
MD		 474 if (icd->current_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
475 icd->current_fmt->fourcc == V4L2_PIX_FMT_NV61)
9e4a56d2 476 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
8be65dc5 477
7a1a8164
MD		 478 value |= common_flags & SOCAM_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
479 value |= common_flags & SOCAM_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
480 value |= buswidth == 16 ? 1 << 12 : 0;
0d3244d6
MD		 481 ceu_write(pcdev, CAMCR, value);
482
483 ceu_write(pcdev, CAPCR, 0x00300000);
ccab8a29 484 ceu_write(pcdev, CAIFR, (pcdev->is_interlace) ? 0x101 : 0);
0d3244d6
MD		 485
486 mdelay(1);
487
8be65dc5
MD		 488 if (yuv_mode) {
489 width = icd->width * 2;
7a1a8164 490 width = buswidth == 16 ? width / 2 : width;
8be65dc5
MD		 491 cfszr_width = cdwdr_width = icd->width;
492 } else {
493 width = icd->width * ((icd->current_fmt->depth + 7) >> 3);
7a1a8164
MD		 494 width = buswidth == 16 ? width / 2 : width;
495 cfszr_width = buswidth == 8 ? width / 2 : width;
496 cdwdr_width = buswidth == 16 ? width * 2 : width;
8be65dc5 497 }
0d3244d6 498
ccab8a29
KM		 499 height = icd->height;
500 if (pcdev->is_interlace) {
501 height /= 2;
502 cdwdr_width *= 2;
503 }
504
0d3244d6 505 ceu_write(pcdev, CAMOR, 0);
ccab8a29 506 ceu_write(pcdev, CAPWR, (height << 16) | width);
8be65dc5 507 ceu_write(pcdev, CFLCR, 0); /* no scaling */
ccab8a29 508 ceu_write(pcdev, CFSZR, (height << 16) | cfszr_width);
8be65dc5 509 ceu_write(pcdev, CLFCR, 0); /* no lowpass filter */
dd54203b
MD		 510
511 /* A few words about byte order (observed in Big Endian mode)
512 *
513 * In data fetch mode bytes are received in chunks of 8 bytes.
514 * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
515 *
516 * The data is however by default written to memory in reverse order:
517 * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
518 *
519 * The lowest three bits of CDOCR allows us to do swapping,
2c0a072e
MD		 520 * using 7 we swap the data bytes to match the incoming order:
521 * D0, D1, D2, D3, D4, D5, D6, D7
dd54203b 522 */
8be65dc5
MD		 523 value = 0x00000017;
524 if (yuv_lineskip)
525 value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
526
527 ceu_write(pcdev, CDOCR, value);
0d3244d6
MD		 528
529 ceu_write(pcdev, CDWDR, cdwdr_width);
530 ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
531
532 /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
0d3244d6
MD		 533 return 0;
534}
535
9414de39 536static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd)
0d3244d6
MD		 537{
538 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
539 struct sh_mobile_ceu_dev *pcdev = ici->priv;
540 unsigned long camera_flags, common_flags;
541
542 camera_flags = icd->ops->query_bus_param(icd);
543 common_flags = soc_camera_bus_param_compatible(camera_flags,
c354b400 544 make_bus_param(pcdev));
0d3244d6
MD		 545 if (!common_flags)
546 return -EINVAL;
547
548 return 0;
549}
550
8be65dc5
MD		 551static const struct soc_camera_data_format sh_mobile_ceu_formats[] = {
552 {
553 .name = "NV12",
554 .depth = 12,
555 .fourcc = V4L2_PIX_FMT_NV12,
556 .colorspace = V4L2_COLORSPACE_JPEG,
557 },
558 {
559 .name = "NV21",
560 .depth = 12,
561 .fourcc = V4L2_PIX_FMT_NV21,
562 .colorspace = V4L2_COLORSPACE_JPEG,
563 },
9e4a56d2
MD		 564 {
565 .name = "NV16",
566 .depth = 16,
567 .fourcc = V4L2_PIX_FMT_NV16,
568 .colorspace = V4L2_COLORSPACE_JPEG,
569 },
570 {
571 .name = "NV61",
572 .depth = 16,
573 .fourcc = V4L2_PIX_FMT_NV61,
574 .colorspace = V4L2_COLORSPACE_JPEG,
575 },
8be65dc5
MD		 576};
577
9414de39
MD		 578static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, int idx,
579 struct soc_camera_format_xlate *xlate)
580{
581 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
8be65dc5 582 int ret, k, n;
9414de39
MD		 583 int formats = 0;
584
585 ret = sh_mobile_ceu_try_bus_param(icd);
586 if (ret < 0)
587 return 0;
588
589 switch (icd->formats[idx].fourcc) {
8be65dc5
MD		 590 case V4L2_PIX_FMT_UYVY:
591 case V4L2_PIX_FMT_VYUY:
592 case V4L2_PIX_FMT_YUYV:
593 case V4L2_PIX_FMT_YVYU:
594 n = ARRAY_SIZE(sh_mobile_ceu_formats);
595 formats += n;
596 for (k = 0; xlate && k < n; k++) {
597 xlate->host_fmt = &sh_mobile_ceu_formats[k];
598 xlate->cam_fmt = icd->formats + idx;
599 xlate->buswidth = icd->formats[idx].depth;
600 xlate++;
601 dev_dbg(&ici->dev, "Providing format %s using %s\n",
602 sh_mobile_ceu_formats[k].name,
603 icd->formats[idx].name);
604 }
9414de39
MD		 605 default:
606 /* Generic pass-through */
607 formats++;
608 if (xlate) {
609 xlate->host_fmt = icd->formats + idx;
610 xlate->cam_fmt = icd->formats + idx;
611 xlate->buswidth = icd->formats[idx].depth;
612 xlate++;
613 dev_dbg(&ici->dev,
614 "Providing format %s in pass-through mode\n",
615 icd->formats[idx].name);
616 }
617 }
618
619 return formats;
620}
621
d8fac217
GL		 622static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
623 __u32 pixfmt, struct v4l2_rect *rect)
0d3244d6 624{
9414de39 625 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
8be65dc5 626 struct sh_mobile_ceu_dev *pcdev = ici->priv;
9414de39 627 const struct soc_camera_format_xlate *xlate;
25c4d74e
GL		 628 int ret;
629
0ad675eb
GL		 630 if (!pixfmt)
631 return icd->ops->set_fmt(icd, pixfmt, rect);
632
9414de39
MD		 633 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
634 if (!xlate) {
635 dev_warn(&ici->dev, "Format %x not found\n", pixfmt);
636 return -EINVAL;
25c4d74e
GL		 637 }
638
0ad675eb 639 ret = icd->ops->set_fmt(icd, xlate->cam_fmt->fourcc, rect);
9414de39 640
0ad675eb 641 if (!ret) {
9414de39
MD		 642 icd->buswidth = xlate->buswidth;
643 icd->current_fmt = xlate->host_fmt;
8be65dc5 644 pcdev->camera_fmt = xlate->cam_fmt;
9414de39 645 }
25c4d74e
GL		 646
647 return ret;
0d3244d6
MD		 648}
649
d8fac217
GL		 650static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
651 struct v4l2_format *f)
0d3244d6 652{
9414de39 653 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
ccab8a29 654 struct sh_mobile_ceu_dev *pcdev = ici->priv;
9414de39
MD		 655 const struct soc_camera_format_xlate *xlate;
656 __u32 pixfmt = f->fmt.pix.pixelformat;
ccab8a29 657 int ret;
a2c8c68c 658
9414de39
MD		 659 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
660 if (!xlate) {
661 dev_warn(&ici->dev, "Format %x not found\n", pixfmt);
25c4d74e 662 return -EINVAL;
9414de39 663 }
25c4d74e 664
0d3244d6
MD		 665 /* FIXME: calculate using depth and bus width */
666
667 if (f->fmt.pix.height < 4)
668 f->fmt.pix.height = 4;
669 if (f->fmt.pix.height > 1920)
670 f->fmt.pix.height = 1920;
671 if (f->fmt.pix.width < 2)
672 f->fmt.pix.width = 2;
673 if (f->fmt.pix.width > 2560)
674 f->fmt.pix.width = 2560;
675 f->fmt.pix.width &= ~0x01;
676 f->fmt.pix.height &= ~0x03;
677
25c4d74e 678 f->fmt.pix.bytesperline = f->fmt.pix.width *
9414de39 679 DIV_ROUND_UP(xlate->host_fmt->depth, 8);
25c4d74e
GL		 680 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
681
0d3244d6 682 /* limit to sensor capabilities */
ccab8a29
KM		 683 ret = icd->ops->try_fmt(icd, f);
684 if (ret < 0)
685 return ret;
686
687 switch (f->fmt.pix.field) {
688 case V4L2_FIELD_INTERLACED:
689 pcdev->is_interlace = 1;
690 break;
691 case V4L2_FIELD_ANY:
692 f->fmt.pix.field = V4L2_FIELD_NONE;
693 /* fall-through */
694 case V4L2_FIELD_NONE:
695 pcdev->is_interlace = 0;
696 break;
697 default:
698 ret = -EINVAL;
699 break;
700 }
701
702 return ret;
0d3244d6
MD		 703}
704
705static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf,
706 struct v4l2_requestbuffers *p)
707{
708 int i;
709
710 /* This is for locking debugging only. I removed spinlocks and now I
711 * check whether .prepare is ever called on a linked buffer, or whether
712 * a dma IRQ can occur for an in-work or unlinked buffer. Until now
713 * it hadn't triggered */
714 for (i = 0; i < p->count; i++) {
715 struct sh_mobile_ceu_buffer *buf;
716
717 buf = container_of(icf->vb_vidq.bufs[i],
718 struct sh_mobile_ceu_buffer, vb);
719 INIT_LIST_HEAD(&buf->vb.queue);
720 }
721
722 return 0;
723}
724
725static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
726{
727 struct soc_camera_file *icf = file->private_data;
728 struct sh_mobile_ceu_buffer *buf;
729
730 buf = list_entry(icf->vb_vidq.stream.next,
731 struct sh_mobile_ceu_buffer, vb.stream);
732
733 poll_wait(file, &buf->vb.done, pt);
734
735 if (buf->vb.state == VIDEOBUF_DONE ||
736 buf->vb.state == VIDEOBUF_ERROR)
737 return POLLIN|POLLRDNORM;
738
739 return 0;
740}
741
742static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
743 struct v4l2_capability *cap)
744{
745 strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
746 cap->version = KERNEL_VERSION(0, 0, 5);
747 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
748 return 0;
749}
750
751static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q,
752 struct soc_camera_device *icd)
753{
754 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
755 struct sh_mobile_ceu_dev *pcdev = ici->priv;
756
757 videobuf_queue_dma_contig_init(q,
758 &sh_mobile_ceu_videobuf_ops,
759 &ici->dev, &pcdev->lock,
760 V4L2_BUF_TYPE_VIDEO_CAPTURE,
b6c6173e 761 V4L2_FIELD_ANY,
0d3244d6
MD		 762 sizeof(struct sh_mobile_ceu_buffer),
763 icd);
764}
765
766static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
767 .owner = THIS_MODULE,
768 .add = sh_mobile_ceu_add_device,
769 .remove = sh_mobile_ceu_remove_device,
9414de39 770 .get_formats = sh_mobile_ceu_get_formats,
d8fac217
GL		 771 .set_fmt = sh_mobile_ceu_set_fmt,
772 .try_fmt = sh_mobile_ceu_try_fmt,
0d3244d6
MD		 773 .reqbufs = sh_mobile_ceu_reqbufs,
774 .poll = sh_mobile_ceu_poll,
775 .querycap = sh_mobile_ceu_querycap,
0d3244d6
MD		 776 .set_bus_param = sh_mobile_ceu_set_bus_param,
777 .init_videobuf = sh_mobile_ceu_init_videobuf,
778};
779
780static int sh_mobile_ceu_probe(struct platform_device *pdev)
781{
782 struct sh_mobile_ceu_dev *pcdev;
783 struct resource *res;
784 void __iomem *base;
a42b6dd6 785 char clk_name[8];
0d3244d6
MD		 786 unsigned int irq;
787 int err = 0;
788
789 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
790 irq = platform_get_irq(pdev, 0);
791 if (!res || !irq) {
792 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
793 err = -ENODEV;
794 goto exit;
795 }
796
797 pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
798 if (!pcdev) {
799 dev_err(&pdev->dev, "Could not allocate pcdev\n");
800 err = -ENOMEM;
801 goto exit;
802 }
803
804 platform_set_drvdata(pdev, pcdev);
805 INIT_LIST_HEAD(&pcdev->capture);
806 spin_lock_init(&pcdev->lock);
807
808 pcdev->pdata = pdev->dev.platform_data;
809 if (!pcdev->pdata) {
810 err = -EINVAL;
811 dev_err(&pdev->dev, "CEU platform data not set.\n");
812 goto exit_kfree;
813 }
814
815 base = ioremap_nocache(res->start, res->end - res->start + 1);
816 if (!base) {
817 err = -ENXIO;
818 dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
819 goto exit_kfree;
820 }
821
822 pcdev->irq = irq;
823 pcdev->base = base;
824 pcdev->video_limit = 0; /* only enabled if second resource exists */
825 pcdev->dev = &pdev->dev;
826
827 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
828 if (res) {
829 err = dma_declare_coherent_memory(&pdev->dev, res->start,
830 res->start,
831 (res->end - res->start) + 1,
832 DMA_MEMORY_MAP |
833 DMA_MEMORY_EXCLUSIVE);
834 if (!err) {
835 dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
836 err = -ENXIO;
837 goto exit_iounmap;
838 }
839
840 pcdev->video_limit = (res->end - res->start) + 1;
841 }
842
843 /* request irq */
844 err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
af128a10 845 dev_name(&pdev->dev), pcdev);
0d3244d6
MD		 846 if (err) {
847 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
848 goto exit_release_mem;
849 }
850
a42b6dd6
MD		 851 snprintf(clk_name, sizeof(clk_name), "ceu%d", pdev->id);
852 pcdev->clk = clk_get(&pdev->dev, clk_name);
853 if (IS_ERR(pcdev->clk)) {
854 dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
855 err = PTR_ERR(pcdev->clk);
856 goto exit_free_irq;
857 }
858
0d3244d6
MD		 859 pcdev->ici.priv = pcdev;
860 pcdev->ici.dev.parent = &pdev->dev;
861 pcdev->ici.nr = pdev->id;
af128a10
KS		 862 pcdev->ici.drv_name = dev_name(&pdev->dev);
863 pcdev->ici.ops = &sh_mobile_ceu_host_ops;
0d3244d6
MD		 864
865 err = soc_camera_host_register(&pcdev->ici);
866 if (err)
a42b6dd6 867 goto exit_free_clk;
0d3244d6
MD		 868
869 return 0;
870
a42b6dd6
MD		 871exit_free_clk:
872 clk_put(pcdev->clk);
0d3244d6
MD		 873exit_free_irq:
874 free_irq(pcdev->irq, pcdev);
875exit_release_mem:
876 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
877 dma_release_declared_memory(&pdev->dev);
878exit_iounmap:
879 iounmap(base);
880exit_kfree:
881 kfree(pcdev);
882exit:
883 return err;
884}
885
886static int sh_mobile_ceu_remove(struct platform_device *pdev)
887{
888 struct sh_mobile_ceu_dev *pcdev = platform_get_drvdata(pdev);
889
890 soc_camera_host_unregister(&pcdev->ici);
a42b6dd6 891 clk_put(pcdev->clk);
0d3244d6
MD		 892 free_irq(pcdev->irq, pcdev);
893 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
894 dma_release_declared_memory(&pdev->dev);
895 iounmap(pcdev->base);
896 kfree(pcdev);
897 return 0;
898}
899
900static struct platform_driver sh_mobile_ceu_driver = {
901 .driver = {
902 .name = "sh_mobile_ceu",
903 },
904 .probe = sh_mobile_ceu_probe,
905 .remove = sh_mobile_ceu_remove,
906};
907
908static int __init sh_mobile_ceu_init(void)
909{
910 return platform_driver_register(&sh_mobile_ceu_driver);
911}
912
913static void __exit sh_mobile_ceu_exit(void)
914{
01c1e4ca 915 platform_driver_unregister(&sh_mobile_ceu_driver);
0d3244d6
MD		 916}
917
918module_init(sh_mobile_ceu_init);
919module_exit(sh_mobile_ceu_exit);
920
921MODULE_DESCRIPTION("SuperH Mobile CEU driver");
922MODULE_AUTHOR("Magnus Damm");
923MODULE_LICENSE("GPL");