2 * V4L2 Driver for SuperH Mobile CEU interface
4 * Copyright (C) 2008 Magnus Damm
6 * Based on V4L2 Driver for PXA camera host - "pxa_camera.c",
8 * Copyright (C) 2006, Sascha Hauer, Pengutronix
9 * Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
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.
17 #include <linux/init.h>
18 #include <linux/module.h>
20 #include <linux/delay.h>
21 #include <linux/dma-mapping.h>
22 #include <linux/errno.h>
24 #include <linux/interrupt.h>
25 #include <linux/kernel.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>
32 #include <linux/videodev2.h>
33 #include <linux/pm_runtime.h>
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>
41 /* register offsets for sh7722 / sh7723 */
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 */
77 /* per video frame buffer */
78 struct sh_mobile_ceu_buffer {
79 struct videobuf_buffer vb; /* v4l buffer must be first */
80 const struct soc_camera_data_format *fmt;
83 struct sh_mobile_ceu_dev {
84 struct soc_camera_host ici;
85 struct soc_camera_device *icd;
89 unsigned long video_limit;
91 /* lock used to protect videobuf */
93 struct list_head capture;
94 struct videobuf_buffer *active;
97 struct sh_mobile_ceu_info *pdata;
99 const struct soc_camera_data_format *camera_fmt;
102 static unsigned long make_bus_param(struct sh_mobile_ceu_dev *pcdev)
106 flags = SOCAM_MASTER |
107 SOCAM_PCLK_SAMPLE_RISING |
108 SOCAM_HSYNC_ACTIVE_HIGH |
109 SOCAM_HSYNC_ACTIVE_LOW |
110 SOCAM_VSYNC_ACTIVE_HIGH |
111 SOCAM_VSYNC_ACTIVE_LOW |
112 SOCAM_DATA_ACTIVE_HIGH;
114 if (pcdev->pdata->flags & SH_CEU_FLAG_USE_8BIT_BUS)
115 flags |= SOCAM_DATAWIDTH_8;
117 if (pcdev->pdata->flags & SH_CEU_FLAG_USE_16BIT_BUS)
118 flags |= SOCAM_DATAWIDTH_16;
120 if (flags & SOCAM_DATAWIDTH_MASK)
126 static void ceu_write(struct sh_mobile_ceu_dev *priv,
127 unsigned long reg_offs, u32 data)
129 iowrite32(data, priv->base + reg_offs);
132 static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
134 return ioread32(priv->base + reg_offs);
138 * Videobuf operations
140 static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq,
144 struct soc_camera_device *icd = vq->priv_data;
145 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
146 struct sh_mobile_ceu_dev *pcdev = ici->priv;
147 int bytes_per_pixel = (icd->current_fmt->depth + 7) >> 3;
149 *size = PAGE_ALIGN(icd->width * icd->height * bytes_per_pixel);
154 if (pcdev->video_limit) {
155 while (*size * *count > pcdev->video_limit)
159 dev_dbg(&icd->dev, "count=%d, size=%d\n", *count, *size);
164 static void free_buffer(struct videobuf_queue *vq,
165 struct sh_mobile_ceu_buffer *buf)
167 struct soc_camera_device *icd = vq->priv_data;
169 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
170 &buf->vb, buf->vb.baddr, buf->vb.bsize);
175 videobuf_waiton(&buf->vb, 0, 0);
176 videobuf_dma_contig_free(vq, &buf->vb);
177 dev_dbg(&icd->dev, "%s freed\n", __func__);
178 buf->vb.state = VIDEOBUF_NEEDS_INIT;
181 #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
182 #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
183 #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
184 #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
187 static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
189 struct soc_camera_device *icd = pcdev->icd;
190 dma_addr_t phys_addr_top, phys_addr_bottom;
192 /* The hardware is _very_ picky about this sequence. Especially
193 * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
194 * several not-so-well documented interrupt sources in CETCR.
196 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_CPEIE);
197 ceu_write(pcdev, CETCR, ~ceu_read(pcdev, CETCR) & CEU_CETCR_MAGIC);
198 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_CPEIE);
199 ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
200 ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
205 phys_addr_top = videobuf_to_dma_contig(pcdev->active);
206 ceu_write(pcdev, CDAYR, phys_addr_top);
207 if (pcdev->is_interlaced) {
208 phys_addr_bottom = phys_addr_top + icd->width;
209 ceu_write(pcdev, CDBYR, phys_addr_bottom);
212 switch (icd->current_fmt->fourcc) {
213 case V4L2_PIX_FMT_NV12:
214 case V4L2_PIX_FMT_NV21:
215 case V4L2_PIX_FMT_NV16:
216 case V4L2_PIX_FMT_NV61:
217 phys_addr_top += icd->width * icd->height;
218 ceu_write(pcdev, CDACR, phys_addr_top);
219 if (pcdev->is_interlaced) {
220 phys_addr_bottom = phys_addr_top + icd->width;
221 ceu_write(pcdev, CDBCR, phys_addr_bottom);
225 pcdev->active->state = VIDEOBUF_ACTIVE;
226 ceu_write(pcdev, CAPSR, 0x1); /* start capture */
229 static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq,
230 struct videobuf_buffer *vb,
231 enum v4l2_field field)
233 struct soc_camera_device *icd = vq->priv_data;
234 struct sh_mobile_ceu_buffer *buf;
237 buf = container_of(vb, struct sh_mobile_ceu_buffer, vb);
239 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
240 vb, vb->baddr, vb->bsize);
242 /* Added list head initialization on alloc */
243 WARN_ON(!list_empty(&vb->queue));
246 /* This can be useful if you want to see if we actually fill
247 * the buffer with something */
248 memset((void *)vb->baddr, 0xaa, vb->bsize);
251 BUG_ON(NULL == icd->current_fmt);
253 if (buf->fmt != icd->current_fmt ||
254 vb->width != icd->width ||
255 vb->height != icd->height ||
256 vb->field != field) {
257 buf->fmt = icd->current_fmt;
258 vb->width = icd->width;
259 vb->height = icd->height;
261 vb->state = VIDEOBUF_NEEDS_INIT;
264 vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3);
265 if (0 != vb->baddr && vb->bsize < vb->size) {
270 if (vb->state == VIDEOBUF_NEEDS_INIT) {
271 ret = videobuf_iolock(vq, vb, NULL);
274 vb->state = VIDEOBUF_PREPARED;
279 free_buffer(vq, buf);
284 /* Called under spinlock_irqsave(&pcdev->lock, ...) */
285 static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq,
286 struct videobuf_buffer *vb)
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;
292 dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
293 vb, vb->baddr, vb->bsize);
295 vb->state = VIDEOBUF_QUEUED;
296 list_add_tail(&vb->queue, &pcdev->capture);
298 if (!pcdev->active) {
300 sh_mobile_ceu_capture(pcdev);
304 static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq,
305 struct videobuf_buffer *vb)
307 free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb));
310 static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = {
311 .buf_setup = sh_mobile_ceu_videobuf_setup,
312 .buf_prepare = sh_mobile_ceu_videobuf_prepare,
313 .buf_queue = sh_mobile_ceu_videobuf_queue,
314 .buf_release = sh_mobile_ceu_videobuf_release,
317 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
319 struct sh_mobile_ceu_dev *pcdev = data;
320 struct videobuf_buffer *vb;
323 spin_lock_irqsave(&pcdev->lock, flags);
326 list_del_init(&vb->queue);
328 if (!list_empty(&pcdev->capture))
329 pcdev->active = list_entry(pcdev->capture.next,
330 struct videobuf_buffer, queue);
332 pcdev->active = NULL;
334 sh_mobile_ceu_capture(pcdev);
336 vb->state = VIDEOBUF_DONE;
337 do_gettimeofday(&vb->ts);
340 spin_unlock_irqrestore(&pcdev->lock, flags);
345 /* Called with .video_lock held */
346 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
348 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
349 struct sh_mobile_ceu_dev *pcdev = ici->priv;
356 "SuperH Mobile CEU driver attached to camera %d\n",
359 ret = icd->ops->init(icd);
363 pm_runtime_get_sync(ici->dev);
365 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
366 while (ceu_read(pcdev, CSTSR) & 1)
374 /* Called with .video_lock held */
375 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
377 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
378 struct sh_mobile_ceu_dev *pcdev = ici->priv;
381 BUG_ON(icd != pcdev->icd);
383 /* disable capture, disable interrupts */
384 ceu_write(pcdev, CEIER, 0);
385 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
387 /* make sure active buffer is canceled */
388 spin_lock_irqsave(&pcdev->lock, flags);
390 list_del(&pcdev->active->queue);
391 pcdev->active->state = VIDEOBUF_ERROR;
392 wake_up_all(&pcdev->active->done);
393 pcdev->active = NULL;
395 spin_unlock_irqrestore(&pcdev->lock, flags);
397 pm_runtime_put_sync(ici->dev);
399 icd->ops->release(icd);
402 "SuperH Mobile CEU driver detached from camera %d\n",
408 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
411 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
412 struct sh_mobile_ceu_dev *pcdev = ici->priv;
413 int ret, buswidth, width, height, cfszr_width, cdwdr_width;
414 unsigned long camera_flags, common_flags, value;
415 int yuv_mode, yuv_lineskip;
417 camera_flags = icd->ops->query_bus_param(icd);
418 common_flags = soc_camera_bus_param_compatible(camera_flags,
419 make_bus_param(pcdev));
423 ret = icd->ops->set_bus_param(icd, common_flags);
427 switch (common_flags & SOCAM_DATAWIDTH_MASK) {
428 case SOCAM_DATAWIDTH_8:
431 case SOCAM_DATAWIDTH_16:
438 ceu_write(pcdev, CRCNTR, 0);
439 ceu_write(pcdev, CRCMPR, 0);
441 value = 0x00000010; /* data fetch by default */
442 yuv_mode = yuv_lineskip = 0;
444 switch (icd->current_fmt->fourcc) {
445 case V4L2_PIX_FMT_NV12:
446 case V4L2_PIX_FMT_NV21:
447 yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */
449 case V4L2_PIX_FMT_NV16:
450 case V4L2_PIX_FMT_NV61:
452 switch (pcdev->camera_fmt->fourcc) {
453 case V4L2_PIX_FMT_UYVY:
454 value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
456 case V4L2_PIX_FMT_VYUY:
457 value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
459 case V4L2_PIX_FMT_YUYV:
460 value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
462 case V4L2_PIX_FMT_YVYU:
463 value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
470 if (icd->current_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
471 icd->current_fmt->fourcc == V4L2_PIX_FMT_NV61)
472 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
474 value |= common_flags & SOCAM_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
475 value |= common_flags & SOCAM_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
476 value |= buswidth == 16 ? 1 << 12 : 0;
477 ceu_write(pcdev, CAMCR, value);
479 ceu_write(pcdev, CAPCR, 0x00300000);
480 ceu_write(pcdev, CAIFR, pcdev->is_interlaced ? 0x101 : 0);
485 width = icd->width * 2;
486 width = buswidth == 16 ? width / 2 : width;
487 cfszr_width = cdwdr_width = icd->width;
489 width = icd->width * ((icd->current_fmt->depth + 7) >> 3);
490 width = buswidth == 16 ? width / 2 : width;
491 cfszr_width = buswidth == 8 ? width / 2 : width;
492 cdwdr_width = buswidth == 16 ? width * 2 : width;
495 height = icd->height;
496 if (pcdev->is_interlaced) {
501 ceu_write(pcdev, CAMOR, 0);
502 ceu_write(pcdev, CAPWR, (height << 16) | width);
503 ceu_write(pcdev, CFLCR, 0); /* no scaling */
504 ceu_write(pcdev, CFSZR, (height << 16) | cfszr_width);
505 ceu_write(pcdev, CLFCR, 0); /* no lowpass filter */
507 /* A few words about byte order (observed in Big Endian mode)
509 * In data fetch mode bytes are received in chunks of 8 bytes.
510 * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
512 * The data is however by default written to memory in reverse order:
513 * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
515 * The lowest three bits of CDOCR allows us to do swapping,
516 * using 7 we swap the data bytes to match the incoming order:
517 * D0, D1, D2, D3, D4, D5, D6, D7
521 value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
523 ceu_write(pcdev, CDOCR, value);
525 ceu_write(pcdev, CDWDR, cdwdr_width);
526 ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
528 /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
532 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd)
534 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
535 struct sh_mobile_ceu_dev *pcdev = ici->priv;
536 unsigned long camera_flags, common_flags;
538 camera_flags = icd->ops->query_bus_param(icd);
539 common_flags = soc_camera_bus_param_compatible(camera_flags,
540 make_bus_param(pcdev));
547 static const struct soc_camera_data_format sh_mobile_ceu_formats[] = {
551 .fourcc = V4L2_PIX_FMT_NV12,
552 .colorspace = V4L2_COLORSPACE_JPEG,
557 .fourcc = V4L2_PIX_FMT_NV21,
558 .colorspace = V4L2_COLORSPACE_JPEG,
563 .fourcc = V4L2_PIX_FMT_NV16,
564 .colorspace = V4L2_COLORSPACE_JPEG,
569 .fourcc = V4L2_PIX_FMT_NV61,
570 .colorspace = V4L2_COLORSPACE_JPEG,
574 static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, int idx,
575 struct soc_camera_format_xlate *xlate)
577 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
581 ret = sh_mobile_ceu_try_bus_param(icd);
585 /* Beginning of a pass */
587 icd->host_priv = NULL;
589 switch (icd->formats[idx].fourcc) {
590 case V4L2_PIX_FMT_UYVY:
591 case V4L2_PIX_FMT_VYUY:
592 case V4L2_PIX_FMT_YUYV:
593 case V4L2_PIX_FMT_YVYU:
595 goto add_single_format;
598 * Our case is simple so far: for any of the above four camera
599 * formats we add all our four synthesized NV* formats, so,
600 * just marking the device with a single flag suffices. If
601 * the format generation rules are more complex, you would have
602 * to actually hang your already added / counted formats onto
603 * the host_priv pointer and check whether the format you're
604 * going to add now is already there.
606 icd->host_priv = (void *)sh_mobile_ceu_formats;
608 n = ARRAY_SIZE(sh_mobile_ceu_formats);
610 for (k = 0; xlate && k < n; k++) {
611 xlate->host_fmt = &sh_mobile_ceu_formats[k];
612 xlate->cam_fmt = icd->formats + idx;
613 xlate->buswidth = icd->formats[idx].depth;
615 dev_dbg(ici->dev, "Providing format %s using %s\n",
616 sh_mobile_ceu_formats[k].name,
617 icd->formats[idx].name);
621 /* Generic pass-through */
624 xlate->host_fmt = icd->formats + idx;
625 xlate->cam_fmt = icd->formats + idx;
626 xlate->buswidth = icd->formats[idx].depth;
629 "Providing format %s in pass-through mode\n",
630 icd->formats[idx].name);
637 static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd,
638 struct v4l2_rect *rect)
640 return icd->ops->set_crop(icd, rect);
643 static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
644 struct v4l2_format *f)
646 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
647 struct sh_mobile_ceu_dev *pcdev = ici->priv;
648 __u32 pixfmt = f->fmt.pix.pixelformat;
649 const struct soc_camera_format_xlate *xlate;
650 struct v4l2_format cam_f = *f;
653 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
655 dev_warn(ici->dev, "Format %x not found\n", pixfmt);
659 cam_f.fmt.pix.pixelformat = xlate->cam_fmt->fourcc;
660 ret = icd->ops->set_fmt(icd, &cam_f);
663 icd->buswidth = xlate->buswidth;
664 icd->current_fmt = xlate->host_fmt;
665 pcdev->camera_fmt = xlate->cam_fmt;
671 static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
672 struct v4l2_format *f)
674 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
675 struct sh_mobile_ceu_dev *pcdev = ici->priv;
676 const struct soc_camera_format_xlate *xlate;
677 __u32 pixfmt = f->fmt.pix.pixelformat;
680 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
682 dev_warn(ici->dev, "Format %x not found\n", pixfmt);
686 /* FIXME: calculate using depth and bus width */
688 v4l_bound_align_image(&f->fmt.pix.width, 2, 2560, 1,
689 &f->fmt.pix.height, 4, 1920, 2, 0);
691 f->fmt.pix.bytesperline = f->fmt.pix.width *
692 DIV_ROUND_UP(xlate->host_fmt->depth, 8);
693 f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
695 /* limit to sensor capabilities */
696 ret = icd->ops->try_fmt(icd, f);
700 switch (f->fmt.pix.field) {
701 case V4L2_FIELD_INTERLACED:
702 pcdev->is_interlaced = 1;
705 f->fmt.pix.field = V4L2_FIELD_NONE;
707 case V4L2_FIELD_NONE:
708 pcdev->is_interlaced = 0;
718 static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf,
719 struct v4l2_requestbuffers *p)
723 /* This is for locking debugging only. I removed spinlocks and now I
724 * check whether .prepare is ever called on a linked buffer, or whether
725 * a dma IRQ can occur for an in-work or unlinked buffer. Until now
726 * it hadn't triggered */
727 for (i = 0; i < p->count; i++) {
728 struct sh_mobile_ceu_buffer *buf;
730 buf = container_of(icf->vb_vidq.bufs[i],
731 struct sh_mobile_ceu_buffer, vb);
732 INIT_LIST_HEAD(&buf->vb.queue);
738 static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
740 struct soc_camera_file *icf = file->private_data;
741 struct sh_mobile_ceu_buffer *buf;
743 buf = list_entry(icf->vb_vidq.stream.next,
744 struct sh_mobile_ceu_buffer, vb.stream);
746 poll_wait(file, &buf->vb.done, pt);
748 if (buf->vb.state == VIDEOBUF_DONE ||
749 buf->vb.state == VIDEOBUF_ERROR)
750 return POLLIN|POLLRDNORM;
755 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
756 struct v4l2_capability *cap)
758 strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
759 cap->version = KERNEL_VERSION(0, 0, 5);
760 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
764 static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q,
765 struct soc_camera_device *icd)
767 struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
768 struct sh_mobile_ceu_dev *pcdev = ici->priv;
770 videobuf_queue_dma_contig_init(q,
771 &sh_mobile_ceu_videobuf_ops,
772 ici->dev, &pcdev->lock,
773 V4L2_BUF_TYPE_VIDEO_CAPTURE,
774 pcdev->is_interlaced ?
775 V4L2_FIELD_INTERLACED : V4L2_FIELD_NONE,
776 sizeof(struct sh_mobile_ceu_buffer),
780 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
781 .owner = THIS_MODULE,
782 .add = sh_mobile_ceu_add_device,
783 .remove = sh_mobile_ceu_remove_device,
784 .get_formats = sh_mobile_ceu_get_formats,
785 .set_crop = sh_mobile_ceu_set_crop,
786 .set_fmt = sh_mobile_ceu_set_fmt,
787 .try_fmt = sh_mobile_ceu_try_fmt,
788 .reqbufs = sh_mobile_ceu_reqbufs,
789 .poll = sh_mobile_ceu_poll,
790 .querycap = sh_mobile_ceu_querycap,
791 .set_bus_param = sh_mobile_ceu_set_bus_param,
792 .init_videobuf = sh_mobile_ceu_init_videobuf,
795 static int sh_mobile_ceu_probe(struct platform_device *pdev)
797 struct sh_mobile_ceu_dev *pcdev;
798 struct resource *res;
803 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
804 irq = platform_get_irq(pdev, 0);
806 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
811 pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
813 dev_err(&pdev->dev, "Could not allocate pcdev\n");
818 INIT_LIST_HEAD(&pcdev->capture);
819 spin_lock_init(&pcdev->lock);
821 pcdev->pdata = pdev->dev.platform_data;
824 dev_err(&pdev->dev, "CEU platform data not set.\n");
828 base = ioremap_nocache(res->start, resource_size(res));
831 dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
837 pcdev->video_limit = 0; /* only enabled if second resource exists */
839 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
841 err = dma_declare_coherent_memory(&pdev->dev, res->start,
845 DMA_MEMORY_EXCLUSIVE);
847 dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
852 pcdev->video_limit = resource_size(res);
856 err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
857 dev_name(&pdev->dev), pcdev);
859 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
860 goto exit_release_mem;
863 pm_suspend_ignore_children(&pdev->dev, true);
864 pm_runtime_enable(&pdev->dev);
865 pm_runtime_resume(&pdev->dev);
867 pcdev->ici.priv = pcdev;
868 pcdev->ici.dev = &pdev->dev;
869 pcdev->ici.nr = pdev->id;
870 pcdev->ici.drv_name = dev_name(&pdev->dev);
871 pcdev->ici.ops = &sh_mobile_ceu_host_ops;
873 err = soc_camera_host_register(&pcdev->ici);
880 free_irq(pcdev->irq, pcdev);
882 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
883 dma_release_declared_memory(&pdev->dev);
892 static int sh_mobile_ceu_remove(struct platform_device *pdev)
894 struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
895 struct sh_mobile_ceu_dev *pcdev = container_of(soc_host,
896 struct sh_mobile_ceu_dev, ici);
898 soc_camera_host_unregister(soc_host);
899 free_irq(pcdev->irq, pcdev);
900 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
901 dma_release_declared_memory(&pdev->dev);
902 iounmap(pcdev->base);
907 static int sh_mobile_ceu_runtime_nop(struct device *dev)
909 /* Runtime PM callback shared between ->runtime_suspend()
910 * and ->runtime_resume(). Simply returns success.
912 * This driver re-initializes all registers after
913 * pm_runtime_get_sync() anyway so there is no need
914 * to save and restore registers here.
919 static struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = {
920 .runtime_suspend = sh_mobile_ceu_runtime_nop,
921 .runtime_resume = sh_mobile_ceu_runtime_nop,
924 static struct platform_driver sh_mobile_ceu_driver = {
926 .name = "sh_mobile_ceu",
927 .pm = &sh_mobile_ceu_dev_pm_ops,
929 .probe = sh_mobile_ceu_probe,
930 .remove = sh_mobile_ceu_remove,
933 static int __init sh_mobile_ceu_init(void)
935 return platform_driver_register(&sh_mobile_ceu_driver);
938 static void __exit sh_mobile_ceu_exit(void)
940 platform_driver_unregister(&sh_mobile_ceu_driver);
943 module_init(sh_mobile_ceu_init);
944 module_exit(sh_mobile_ceu_exit);
946 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
947 MODULE_AUTHOR("Magnus Damm");
948 MODULE_LICENSE("GPL");