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/completion.h>
21 #include <linux/delay.h>
22 #include <linux/dma-mapping.h>
23 #include <linux/errno.h>
25 #include <linux/interrupt.h>
26 #include <linux/kernel.h>
28 #include <linux/moduleparam.h>
29 #include <linux/time.h>
30 #include <linux/slab.h>
31 #include <linux/device.h>
32 #include <linux/platform_device.h>
33 #include <linux/videodev2.h>
34 #include <linux/pm_runtime.h>
35 #include <linux/sched.h>
37 #include <media/v4l2-common.h>
38 #include <media/v4l2-dev.h>
39 #include <media/soc_camera.h>
40 #include <media/sh_mobile_ceu.h>
41 #include <media/sh_mobile_csi2.h>
42 #include <media/videobuf2-dma-contig.h>
43 #include <media/v4l2-mediabus.h>
44 #include <media/soc_mediabus.h>
46 /* register offsets for sh7722 / sh7723 */
48 #define CAPSR 0x00 /* Capture start register */
49 #define CAPCR 0x04 /* Capture control register */
50 #define CAMCR 0x08 /* Capture interface control register */
51 #define CMCYR 0x0c /* Capture interface cycle register */
52 #define CAMOR 0x10 /* Capture interface offset register */
53 #define CAPWR 0x14 /* Capture interface width register */
54 #define CAIFR 0x18 /* Capture interface input format register */
55 #define CSTCR 0x20 /* Camera strobe control register (<= sh7722) */
56 #define CSECR 0x24 /* Camera strobe emission count register (<= sh7722) */
57 #define CRCNTR 0x28 /* CEU register control register */
58 #define CRCMPR 0x2c /* CEU register forcible control register */
59 #define CFLCR 0x30 /* Capture filter control register */
60 #define CFSZR 0x34 /* Capture filter size clip register */
61 #define CDWDR 0x38 /* Capture destination width register */
62 #define CDAYR 0x3c /* Capture data address Y register */
63 #define CDACR 0x40 /* Capture data address C register */
64 #define CDBYR 0x44 /* Capture data bottom-field address Y register */
65 #define CDBCR 0x48 /* Capture data bottom-field address C register */
66 #define CBDSR 0x4c /* Capture bundle destination size register */
67 #define CFWCR 0x5c /* Firewall operation control register */
68 #define CLFCR 0x60 /* Capture low-pass filter control register */
69 #define CDOCR 0x64 /* Capture data output control register */
70 #define CDDCR 0x68 /* Capture data complexity level register */
71 #define CDDAR 0x6c /* Capture data complexity level address register */
72 #define CEIER 0x70 /* Capture event interrupt enable register */
73 #define CETCR 0x74 /* Capture event flag clear register */
74 #define CSTSR 0x7c /* Capture status register */
75 #define CSRTR 0x80 /* Capture software reset register */
76 #define CDSSR 0x84 /* Capture data size register */
77 #define CDAYR2 0x90 /* Capture data address Y register 2 */
78 #define CDACR2 0x94 /* Capture data address C register 2 */
79 #define CDBYR2 0x98 /* Capture data bottom-field address Y register 2 */
80 #define CDBCR2 0x9c /* Capture data bottom-field address C register 2 */
84 #define dev_geo dev_info
86 #define dev_geo dev_dbg
89 /* per video frame buffer */
90 struct sh_mobile_ceu_buffer {
91 struct vb2_buffer vb; /* v4l buffer must be first */
92 struct list_head queue;
95 struct sh_mobile_ceu_dev {
96 struct soc_camera_host ici;
97 struct soc_camera_device *icd;
98 struct platform_device *csi2_pdev;
105 spinlock_t lock; /* Protects video buffer lists */
106 struct list_head capture;
107 struct vb2_buffer *active;
108 struct vb2_alloc_ctx *alloc_ctx;
110 struct sh_mobile_ceu_info *pdata;
111 struct completion complete;
115 enum v4l2_field field;
118 unsigned int image_mode:1;
119 unsigned int is_16bit:1;
120 unsigned int frozen:1;
123 struct sh_mobile_ceu_cam {
124 /* CEU offsets within the camera output, before the CEU scaler */
125 unsigned int ceu_left;
126 unsigned int ceu_top;
127 /* Client output, as seen by the CEU */
131 * User window from S_CROP / G_CROP, produced by client cropping and
132 * scaling, CEU scaling and CEU cropping, mapped back onto the client
135 struct v4l2_rect subrect;
136 /* Camera cropping rectangle */
137 struct v4l2_rect rect;
138 const struct soc_mbus_pixelfmt *extra_fmt;
139 enum v4l2_mbus_pixelcode code;
142 static struct sh_mobile_ceu_buffer *to_ceu_vb(struct vb2_buffer *vb)
144 return container_of(vb, struct sh_mobile_ceu_buffer, vb);
147 static void ceu_write(struct sh_mobile_ceu_dev *priv,
148 unsigned long reg_offs, u32 data)
150 iowrite32(data, priv->base + reg_offs);
153 static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
155 return ioread32(priv->base + reg_offs);
158 static int sh_mobile_ceu_soft_reset(struct sh_mobile_ceu_dev *pcdev)
161 struct soc_camera_device *icd = pcdev->icd;
163 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
165 /* wait CSTSR.CPTON bit */
166 for (i = 0; i < 1000; i++) {
167 if (!(ceu_read(pcdev, CSTSR) & 1)) {
174 /* wait CAPSR.CPKIL bit */
175 for (i = 0; i < 1000; i++) {
176 if (!(ceu_read(pcdev, CAPSR) & (1 << 16))) {
185 dev_warn(icd->pdev, "soft reset time out\n");
193 * Videobuf operations
197 * .queue_setup() is called to check, whether the driver can accept the
198 * requested number of buffers and to fill in plane sizes
199 * for the current frame format if required
201 static int sh_mobile_ceu_videobuf_setup(struct vb2_queue *vq,
202 const struct v4l2_format *fmt,
203 unsigned int *count, unsigned int *num_planes,
204 unsigned int sizes[], void *alloc_ctxs[])
206 struct soc_camera_device *icd = container_of(vq, struct soc_camera_device, vb2_vidq);
207 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
208 struct sh_mobile_ceu_dev *pcdev = ici->priv;
213 const struct soc_camera_format_xlate *xlate = soc_camera_xlate_by_fourcc(icd,
214 fmt->fmt.pix.pixelformat);
217 bytes_per_line = soc_mbus_bytes_per_line(fmt->fmt.pix.width,
219 height = fmt->fmt.pix.height;
221 /* Called from VIDIOC_REQBUFS or in compatibility mode */
222 bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
223 icd->current_fmt->host_fmt);
224 height = icd->user_height;
226 if (bytes_per_line < 0)
227 return bytes_per_line;
229 sizes[0] = bytes_per_line * height;
231 alloc_ctxs[0] = pcdev->alloc_ctx;
233 if (!vq->num_buffers)
239 /* If *num_planes != 0, we have already verified *count. */
240 if (pcdev->video_limit && !*num_planes) {
241 size_t size = PAGE_ALIGN(sizes[0]) * *count;
243 if (size + pcdev->buf_total > pcdev->video_limit)
244 *count = (pcdev->video_limit - pcdev->buf_total) /
245 PAGE_ALIGN(sizes[0]);
250 dev_dbg(icd->parent, "count=%d, size=%u\n", *count, sizes[0]);
255 #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
256 #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
257 #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
258 #define CEU_CEIER_VBP (1 << 20) /* vbp error */
259 #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
260 #define CEU_CEIER_MASK (CEU_CEIER_CPEIE | CEU_CEIER_VBP)
264 * return value doesn't reflex the success/failure to queue the new buffer,
265 * but rather the status of the previous buffer.
267 static int sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
269 struct soc_camera_device *icd = pcdev->icd;
270 dma_addr_t phys_addr_top, phys_addr_bottom;
271 unsigned long top1, top2;
272 unsigned long bottom1, bottom2;
278 * The hardware is _very_ picky about this sequence. Especially
279 * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
280 * several not-so-well documented interrupt sources in CETCR.
282 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_MASK);
283 status = ceu_read(pcdev, CETCR);
284 ceu_write(pcdev, CETCR, ~status & CEU_CETCR_MAGIC);
286 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_MASK);
287 ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
288 ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
291 * When a VBP interrupt occurs, a capture end interrupt does not occur
292 * and the image of that frame is not captured correctly. So, soft reset
295 if (status & CEU_CEIER_VBP) {
296 sh_mobile_ceu_soft_reset(pcdev);
301 complete(&pcdev->complete);
308 if (V4L2_FIELD_INTERLACED_BT == pcdev->field) {
320 phys_addr_top = vb2_dma_contig_plane_dma_addr(pcdev->active, 0);
322 switch (icd->current_fmt->host_fmt->fourcc) {
323 case V4L2_PIX_FMT_NV12:
324 case V4L2_PIX_FMT_NV21:
325 case V4L2_PIX_FMT_NV16:
326 case V4L2_PIX_FMT_NV61:
333 ceu_write(pcdev, top1, phys_addr_top);
334 if (V4L2_FIELD_NONE != pcdev->field) {
336 phys_addr_bottom = phys_addr_top + icd->user_width;
338 phys_addr_bottom = phys_addr_top +
339 soc_mbus_bytes_per_line(icd->user_width,
340 icd->current_fmt->host_fmt);
341 ceu_write(pcdev, bottom1, phys_addr_bottom);
345 phys_addr_top += icd->user_width *
347 ceu_write(pcdev, top2, phys_addr_top);
348 if (V4L2_FIELD_NONE != pcdev->field) {
349 phys_addr_bottom = phys_addr_top + icd->user_width;
350 ceu_write(pcdev, bottom2, phys_addr_bottom);
354 ceu_write(pcdev, CAPSR, 0x1); /* start capture */
359 static int sh_mobile_ceu_videobuf_prepare(struct vb2_buffer *vb)
361 struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb);
363 /* Added list head initialization on alloc */
364 WARN(!list_empty(&buf->queue), "Buffer %p on queue!\n", vb);
369 static void sh_mobile_ceu_videobuf_queue(struct vb2_buffer *vb)
371 struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq);
372 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
373 struct sh_mobile_ceu_dev *pcdev = ici->priv;
374 struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb);
376 int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
377 icd->current_fmt->host_fmt);
379 if (bytes_per_line < 0)
382 size = icd->user_height * bytes_per_line;
384 if (vb2_plane_size(vb, 0) < size) {
385 dev_err(icd->parent, "Buffer #%d too small (%lu < %lu)\n",
386 vb->v4l2_buf.index, vb2_plane_size(vb, 0), size);
390 vb2_set_plane_payload(vb, 0, size);
392 dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
393 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
397 * This can be useful if you want to see if we actually fill
398 * the buffer with something
400 if (vb2_plane_vaddr(vb, 0))
401 memset(vb2_plane_vaddr(vb, 0), 0xaa, vb2_get_plane_payload(vb, 0));
404 spin_lock_irq(&pcdev->lock);
405 list_add_tail(&buf->queue, &pcdev->capture);
407 if (!pcdev->active) {
409 * Because there were no active buffer at this moment,
410 * we are not interested in the return value of
411 * sh_mobile_ceu_capture here.
414 sh_mobile_ceu_capture(pcdev);
416 spin_unlock_irq(&pcdev->lock);
421 vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
424 static void sh_mobile_ceu_videobuf_release(struct vb2_buffer *vb)
426 struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq);
427 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
428 struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb);
429 struct sh_mobile_ceu_dev *pcdev = ici->priv;
431 spin_lock_irq(&pcdev->lock);
433 if (pcdev->active == vb) {
434 /* disable capture (release DMA buffer), reset */
435 ceu_write(pcdev, CAPSR, 1 << 16);
436 pcdev->active = NULL;
440 * Doesn't hurt also if the list is empty, but it hurts, if queuing the
441 * buffer failed, and .buf_init() hasn't been called
444 list_del_init(&buf->queue);
446 pcdev->buf_total -= PAGE_ALIGN(vb2_plane_size(vb, 0));
447 dev_dbg(icd->parent, "%s() %zu bytes buffers\n", __func__,
450 spin_unlock_irq(&pcdev->lock);
453 static int sh_mobile_ceu_videobuf_init(struct vb2_buffer *vb)
455 struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq);
456 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
457 struct sh_mobile_ceu_dev *pcdev = ici->priv;
459 pcdev->buf_total += PAGE_ALIGN(vb2_plane_size(vb, 0));
460 dev_dbg(icd->parent, "%s() %zu bytes buffers\n", __func__,
463 /* This is for locking debugging only */
464 INIT_LIST_HEAD(&to_ceu_vb(vb)->queue);
468 static int sh_mobile_ceu_stop_streaming(struct vb2_queue *q)
470 struct soc_camera_device *icd = container_of(q, struct soc_camera_device, vb2_vidq);
471 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
472 struct sh_mobile_ceu_dev *pcdev = ici->priv;
473 struct list_head *buf_head, *tmp;
475 spin_lock_irq(&pcdev->lock);
477 pcdev->active = NULL;
479 list_for_each_safe(buf_head, tmp, &pcdev->capture)
480 list_del_init(buf_head);
482 spin_unlock_irq(&pcdev->lock);
484 return sh_mobile_ceu_soft_reset(pcdev);
487 static struct vb2_ops sh_mobile_ceu_videobuf_ops = {
488 .queue_setup = sh_mobile_ceu_videobuf_setup,
489 .buf_prepare = sh_mobile_ceu_videobuf_prepare,
490 .buf_queue = sh_mobile_ceu_videobuf_queue,
491 .buf_cleanup = sh_mobile_ceu_videobuf_release,
492 .buf_init = sh_mobile_ceu_videobuf_init,
493 .wait_prepare = soc_camera_unlock,
494 .wait_finish = soc_camera_lock,
495 .stop_streaming = sh_mobile_ceu_stop_streaming,
498 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
500 struct sh_mobile_ceu_dev *pcdev = data;
501 struct vb2_buffer *vb;
504 spin_lock(&pcdev->lock);
508 /* Stale interrupt from a released buffer */
511 list_del_init(&to_ceu_vb(vb)->queue);
513 if (!list_empty(&pcdev->capture))
514 pcdev->active = &list_entry(pcdev->capture.next,
515 struct sh_mobile_ceu_buffer, queue)->vb;
517 pcdev->active = NULL;
519 ret = sh_mobile_ceu_capture(pcdev);
520 do_gettimeofday(&vb->v4l2_buf.timestamp);
522 vb->v4l2_buf.field = pcdev->field;
523 vb->v4l2_buf.sequence = pcdev->sequence++;
525 vb2_buffer_done(vb, ret < 0 ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
528 spin_unlock(&pcdev->lock);
533 static struct v4l2_subdev *find_csi2(struct sh_mobile_ceu_dev *pcdev)
535 struct v4l2_subdev *sd;
537 if (!pcdev->csi2_pdev)
540 v4l2_device_for_each_subdev(sd, &pcdev->ici.v4l2_dev)
541 if (&pcdev->csi2_pdev->dev == v4l2_get_subdevdata(sd))
547 /* Called with .video_lock held */
548 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
550 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
551 struct sh_mobile_ceu_dev *pcdev = ici->priv;
552 struct v4l2_subdev *csi2_sd;
558 dev_info(icd->parent,
559 "SuperH Mobile CEU driver attached to camera %d\n",
562 pm_runtime_get_sync(ici->v4l2_dev.dev);
564 pcdev->buf_total = 0;
566 ret = sh_mobile_ceu_soft_reset(pcdev);
568 csi2_sd = find_csi2(pcdev);
570 csi2_sd->grp_id = (long)icd;
572 ret = v4l2_subdev_call(csi2_sd, core, s_power, 1);
573 if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) {
574 pm_runtime_put_sync(ici->v4l2_dev.dev);
579 * -ENODEV is special: either csi2_sd == NULL or the CSI-2 driver
580 * has not found this soc-camera device among its clients
582 if (ret == -ENODEV && csi2_sd)
589 /* Called with .video_lock held */
590 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
592 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
593 struct sh_mobile_ceu_dev *pcdev = ici->priv;
594 struct v4l2_subdev *csi2_sd = find_csi2(pcdev);
596 BUG_ON(icd != pcdev->icd);
598 v4l2_subdev_call(csi2_sd, core, s_power, 0);
601 /* disable capture, disable interrupts */
602 ceu_write(pcdev, CEIER, 0);
603 sh_mobile_ceu_soft_reset(pcdev);
605 /* make sure active buffer is canceled */
606 spin_lock_irq(&pcdev->lock);
608 list_del_init(&to_ceu_vb(pcdev->active)->queue);
609 vb2_buffer_done(pcdev->active, VB2_BUF_STATE_ERROR);
610 pcdev->active = NULL;
612 spin_unlock_irq(&pcdev->lock);
614 pm_runtime_put_sync(ici->v4l2_dev.dev);
616 dev_info(icd->parent,
617 "SuperH Mobile CEU driver detached from camera %d\n",
624 * See chapter 29.4.12 "Capture Filter Control Register (CFLCR)"
625 * in SH7722 Hardware Manual
627 static unsigned int size_dst(unsigned int src, unsigned int scale)
629 unsigned int mant_pre = scale >> 12;
632 return ((mant_pre + 2 * (src - 1)) / (2 * mant_pre) - 1) *
633 mant_pre * 4096 / scale + 1;
636 static u16 calc_scale(unsigned int src, unsigned int *dst)
643 scale = (src * 4096 / *dst) & ~7;
645 while (scale > 4096 && size_dst(src, scale) < *dst)
648 *dst = size_dst(src, scale);
653 /* rect is guaranteed to not exceed the scaled camera rectangle */
654 static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd)
656 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
657 struct sh_mobile_ceu_cam *cam = icd->host_priv;
658 struct sh_mobile_ceu_dev *pcdev = ici->priv;
659 unsigned int height, width, cdwdr_width, in_width, in_height;
660 unsigned int left_offset, top_offset;
663 dev_geo(icd->parent, "Crop %ux%u@%u:%u\n",
664 icd->user_width, icd->user_height, cam->ceu_left, cam->ceu_top);
666 left_offset = cam->ceu_left;
667 top_offset = cam->ceu_top;
669 WARN_ON(icd->user_width & 3 || icd->user_height & 3);
671 width = icd->user_width;
673 if (pcdev->image_mode) {
674 in_width = cam->width;
675 if (!pcdev->is_16bit) {
681 int bytes_per_line = soc_mbus_bytes_per_line(width,
682 icd->current_fmt->host_fmt);
683 unsigned int w_factor;
685 switch (icd->current_fmt->host_fmt->packing) {
686 case SOC_MBUS_PACKING_2X8_PADHI:
693 in_width = cam->width * w_factor;
694 left_offset *= w_factor;
696 if (bytes_per_line < 0)
699 cdwdr_width = bytes_per_line;
702 height = icd->user_height;
703 in_height = cam->height;
704 if (V4L2_FIELD_NONE != pcdev->field) {
705 height = (height / 2) & ~3;
711 /* CSI2 special configuration */
712 if (pcdev->pdata->csi2) {
713 in_width = ((in_width - 2) * 2);
717 /* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */
718 camor = left_offset | (top_offset << 16);
721 "CAMOR 0x%x, CAPWR 0x%x, CFSZR 0x%x, CDWDR 0x%x\n", camor,
722 (in_height << 16) | in_width, (height << 16) | width,
725 ceu_write(pcdev, CAMOR, camor);
726 ceu_write(pcdev, CAPWR, (in_height << 16) | in_width);
727 /* CFSZR clipping is applied _after_ the scaling filter (CFLCR) */
728 ceu_write(pcdev, CFSZR, (height << 16) | width);
729 ceu_write(pcdev, CDWDR, cdwdr_width);
732 static u32 capture_save_reset(struct sh_mobile_ceu_dev *pcdev)
734 u32 capsr = ceu_read(pcdev, CAPSR);
735 ceu_write(pcdev, CAPSR, 1 << 16); /* reset, stop capture */
739 static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr)
741 unsigned long timeout = jiffies + 10 * HZ;
744 * Wait until the end of the current frame. It can take a long time,
745 * but if it has been aborted by a CAPSR reset, it shoule exit sooner.
747 while ((ceu_read(pcdev, CSTSR) & 1) && time_before(jiffies, timeout))
750 if (time_after(jiffies, timeout)) {
751 dev_err(pcdev->ici.v4l2_dev.dev,
752 "Timeout waiting for frame end! Interface problem?\n");
756 /* Wait until reset clears, this shall not hang... */
757 while (ceu_read(pcdev, CAPSR) & (1 << 16))
760 /* Anything to restore? */
761 if (capsr & ~(1 << 16))
762 ceu_write(pcdev, CAPSR, capsr);
765 /* Find the bus subdevice driver, e.g., CSI2 */
766 static struct v4l2_subdev *find_bus_subdev(struct sh_mobile_ceu_dev *pcdev,
767 struct soc_camera_device *icd)
769 if (pcdev->csi2_pdev) {
770 struct v4l2_subdev *csi2_sd = find_csi2(pcdev);
771 if (csi2_sd && csi2_sd->grp_id == (u32)icd)
775 return soc_camera_to_subdev(icd);
778 #define CEU_BUS_FLAGS (V4L2_MBUS_MASTER | \
779 V4L2_MBUS_PCLK_SAMPLE_RISING | \
780 V4L2_MBUS_HSYNC_ACTIVE_HIGH | \
781 V4L2_MBUS_HSYNC_ACTIVE_LOW | \
782 V4L2_MBUS_VSYNC_ACTIVE_HIGH | \
783 V4L2_MBUS_VSYNC_ACTIVE_LOW | \
784 V4L2_MBUS_DATA_ACTIVE_HIGH)
786 /* Capture is not running, no interrupts, no locking needed */
787 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
790 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
791 struct sh_mobile_ceu_dev *pcdev = ici->priv;
792 struct v4l2_subdev *sd = find_bus_subdev(pcdev, icd);
793 struct sh_mobile_ceu_cam *cam = icd->host_priv;
794 struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
795 unsigned long value, common_flags = CEU_BUS_FLAGS;
796 u32 capsr = capture_save_reset(pcdev);
797 unsigned int yuv_lineskip;
801 * If the client doesn't implement g_mbus_config, we just use our
804 ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
806 common_flags = soc_mbus_config_compatible(&cfg,
810 } else if (ret != -ENOIOCTLCMD) {
814 /* Make choises, based on platform preferences */
815 if ((common_flags & V4L2_MBUS_HSYNC_ACTIVE_HIGH) &&
816 (common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) {
817 if (pcdev->pdata->flags & SH_CEU_FLAG_HSYNC_LOW)
818 common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_HIGH;
820 common_flags &= ~V4L2_MBUS_HSYNC_ACTIVE_LOW;
823 if ((common_flags & V4L2_MBUS_VSYNC_ACTIVE_HIGH) &&
824 (common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) {
825 if (pcdev->pdata->flags & SH_CEU_FLAG_VSYNC_LOW)
826 common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_HIGH;
828 common_flags &= ~V4L2_MBUS_VSYNC_ACTIVE_LOW;
831 cfg.flags = common_flags;
832 ret = v4l2_subdev_call(sd, video, s_mbus_config, &cfg);
833 if (ret < 0 && ret != -ENOIOCTLCMD)
836 if (icd->current_fmt->host_fmt->bits_per_sample > 8)
841 ceu_write(pcdev, CRCNTR, 0);
842 ceu_write(pcdev, CRCMPR, 0);
844 value = 0x00000010; /* data fetch by default */
847 switch (icd->current_fmt->host_fmt->fourcc) {
848 case V4L2_PIX_FMT_NV12:
849 case V4L2_PIX_FMT_NV21:
850 /* convert 4:2:2 -> 4:2:0 */
851 yuv_lineskip = 0; /* skip for NV12/21, no skip for NV16/61 */
853 case V4L2_PIX_FMT_NV16:
854 case V4L2_PIX_FMT_NV61:
856 case V4L2_MBUS_FMT_UYVY8_2X8:
857 value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
859 case V4L2_MBUS_FMT_VYUY8_2X8:
860 value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
862 case V4L2_MBUS_FMT_YUYV8_2X8:
863 value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
865 case V4L2_MBUS_FMT_YVYU8_2X8:
866 value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
873 if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
874 icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV61)
875 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
877 value |= common_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
878 value |= common_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
879 value |= pcdev->is_16bit ? 1 << 12 : 0;
882 if (pcdev->pdata->csi2)
885 ceu_write(pcdev, CAMCR, value);
887 ceu_write(pcdev, CAPCR, 0x00300000);
889 switch (pcdev->field) {
890 case V4L2_FIELD_INTERLACED_TB:
893 case V4L2_FIELD_INTERLACED_BT:
900 ceu_write(pcdev, CAIFR, value);
902 sh_mobile_ceu_set_rect(icd);
905 dev_geo(icd->parent, "CFLCR 0x%x\n", pcdev->cflcr);
906 ceu_write(pcdev, CFLCR, pcdev->cflcr);
909 * A few words about byte order (observed in Big Endian mode)
911 * In data fetch mode bytes are received in chunks of 8 bytes.
912 * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
914 * The data is however by default written to memory in reverse order:
915 * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
917 * The lowest three bits of CDOCR allows us to do swapping,
918 * using 7 we swap the data bytes to match the incoming order:
919 * D0, D1, D2, D3, D4, D5, D6, D7
921 value = 0x00000007 | yuv_lineskip;
923 ceu_write(pcdev, CDOCR, value);
924 ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
926 dev_dbg(icd->parent, "S_FMT successful for %c%c%c%c %ux%u\n",
927 pixfmt & 0xff, (pixfmt >> 8) & 0xff,
928 (pixfmt >> 16) & 0xff, (pixfmt >> 24) & 0xff,
929 icd->user_width, icd->user_height);
931 capture_restore(pcdev, capsr);
933 /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
937 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd,
938 unsigned char buswidth)
940 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
941 struct sh_mobile_ceu_dev *pcdev = ici->priv;
942 struct v4l2_subdev *sd = find_bus_subdev(pcdev, icd);
943 unsigned long common_flags = CEU_BUS_FLAGS;
944 struct v4l2_mbus_config cfg = {.type = V4L2_MBUS_PARALLEL,};
947 ret = v4l2_subdev_call(sd, video, g_mbus_config, &cfg);
949 common_flags = soc_mbus_config_compatible(&cfg,
951 else if (ret != -ENOIOCTLCMD)
954 if (!common_flags || buswidth > 16)
960 static const struct soc_mbus_pixelfmt sh_mobile_ceu_formats[] = {
962 .fourcc = V4L2_PIX_FMT_NV12,
964 .bits_per_sample = 8,
965 .packing = SOC_MBUS_PACKING_1_5X8,
966 .order = SOC_MBUS_ORDER_LE,
968 .fourcc = V4L2_PIX_FMT_NV21,
970 .bits_per_sample = 8,
971 .packing = SOC_MBUS_PACKING_1_5X8,
972 .order = SOC_MBUS_ORDER_LE,
974 .fourcc = V4L2_PIX_FMT_NV16,
976 .bits_per_sample = 8,
977 .packing = SOC_MBUS_PACKING_2X8_PADHI,
978 .order = SOC_MBUS_ORDER_LE,
980 .fourcc = V4L2_PIX_FMT_NV61,
982 .bits_per_sample = 8,
983 .packing = SOC_MBUS_PACKING_2X8_PADHI,
984 .order = SOC_MBUS_ORDER_LE,
988 /* This will be corrected as we get more formats */
989 static bool sh_mobile_ceu_packing_supported(const struct soc_mbus_pixelfmt *fmt)
991 return fmt->packing == SOC_MBUS_PACKING_NONE ||
992 (fmt->bits_per_sample == 8 &&
993 fmt->packing == SOC_MBUS_PACKING_1_5X8) ||
994 (fmt->bits_per_sample == 8 &&
995 fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) ||
996 (fmt->bits_per_sample > 8 &&
997 fmt->packing == SOC_MBUS_PACKING_EXTEND16);
1000 static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect);
1002 static struct soc_camera_device *ctrl_to_icd(struct v4l2_ctrl *ctrl)
1004 return container_of(ctrl->handler, struct soc_camera_device,
1008 static int sh_mobile_ceu_s_ctrl(struct v4l2_ctrl *ctrl)
1010 struct soc_camera_device *icd = ctrl_to_icd(ctrl);
1011 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1012 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1015 case V4L2_CID_SHARPNESS:
1016 switch (icd->current_fmt->host_fmt->fourcc) {
1017 case V4L2_PIX_FMT_NV12:
1018 case V4L2_PIX_FMT_NV21:
1019 case V4L2_PIX_FMT_NV16:
1020 case V4L2_PIX_FMT_NV61:
1021 ceu_write(pcdev, CLFCR, !ctrl->val);
1030 static const struct v4l2_ctrl_ops sh_mobile_ceu_ctrl_ops = {
1031 .s_ctrl = sh_mobile_ceu_s_ctrl,
1034 static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, unsigned int idx,
1035 struct soc_camera_format_xlate *xlate)
1037 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1038 struct device *dev = icd->parent;
1039 struct soc_camera_host *ici = to_soc_camera_host(dev);
1040 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1043 struct sh_mobile_ceu_cam *cam;
1044 enum v4l2_mbus_pixelcode code;
1045 const struct soc_mbus_pixelfmt *fmt;
1047 ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code);
1049 /* No more formats */
1052 fmt = soc_mbus_get_fmtdesc(code);
1054 dev_warn(dev, "unsupported format code #%u: %d\n", idx, code);
1058 if (!pcdev->pdata->csi2) {
1059 /* Are there any restrictions in the CSI-2 case? */
1060 ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample);
1065 if (!icd->host_priv) {
1066 struct v4l2_mbus_framefmt mf;
1067 struct v4l2_rect rect;
1070 /* Add our control */
1071 v4l2_ctrl_new_std(&icd->ctrl_handler, &sh_mobile_ceu_ctrl_ops,
1072 V4L2_CID_SHARPNESS, 0, 1, 1, 0);
1073 if (icd->ctrl_handler.error)
1074 return icd->ctrl_handler.error;
1076 /* FIXME: subwindow is lost between close / open */
1078 /* Cache current client geometry */
1079 ret = client_g_rect(sd, &rect);
1084 ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
1088 while ((mf.width > 2560 || mf.height > 1920) && shift < 4) {
1089 /* Try 2560x1920, 1280x960, 640x480, 320x240 */
1090 mf.width = 2560 >> shift;
1091 mf.height = 1920 >> shift;
1092 ret = v4l2_device_call_until_err(sd->v4l2_dev, (long)icd, video,
1100 dev_err(dev, "Failed to configure the client below %ux%x\n",
1101 mf.width, mf.height);
1105 dev_geo(dev, "camera fmt %ux%u\n", mf.width, mf.height);
1107 cam = kzalloc(sizeof(*cam), GFP_KERNEL);
1111 /* We are called with current camera crop, initialise subrect with it */
1113 cam->subrect = rect;
1115 cam->width = mf.width;
1116 cam->height = mf.height;
1118 icd->host_priv = cam;
1120 cam = icd->host_priv;
1123 /* Beginning of a pass */
1125 cam->extra_fmt = NULL;
1128 case V4L2_MBUS_FMT_UYVY8_2X8:
1129 case V4L2_MBUS_FMT_VYUY8_2X8:
1130 case V4L2_MBUS_FMT_YUYV8_2X8:
1131 case V4L2_MBUS_FMT_YVYU8_2X8:
1136 * Our case is simple so far: for any of the above four camera
1137 * formats we add all our four synthesized NV* formats, so,
1138 * just marking the device with a single flag suffices. If
1139 * the format generation rules are more complex, you would have
1140 * to actually hang your already added / counted formats onto
1141 * the host_priv pointer and check whether the format you're
1142 * going to add now is already there.
1144 cam->extra_fmt = sh_mobile_ceu_formats;
1146 n = ARRAY_SIZE(sh_mobile_ceu_formats);
1148 for (k = 0; xlate && k < n; k++) {
1149 xlate->host_fmt = &sh_mobile_ceu_formats[k];
1152 dev_dbg(dev, "Providing format %s using code %d\n",
1153 sh_mobile_ceu_formats[k].name, code);
1157 if (!sh_mobile_ceu_packing_supported(fmt))
1161 /* Generic pass-through */
1164 xlate->host_fmt = fmt;
1167 dev_dbg(dev, "Providing format %s in pass-through mode\n",
1174 static void sh_mobile_ceu_put_formats(struct soc_camera_device *icd)
1176 kfree(icd->host_priv);
1177 icd->host_priv = NULL;
1180 /* Check if any dimension of r1 is smaller than respective one of r2 */
1181 static bool is_smaller(struct v4l2_rect *r1, struct v4l2_rect *r2)
1183 return r1->width < r2->width || r1->height < r2->height;
1186 /* Check if r1 fails to cover r2 */
1187 static bool is_inside(struct v4l2_rect *r1, struct v4l2_rect *r2)
1189 return r1->left > r2->left || r1->top > r2->top ||
1190 r1->left + r1->width < r2->left + r2->width ||
1191 r1->top + r1->height < r2->top + r2->height;
1194 static unsigned int scale_down(unsigned int size, unsigned int scale)
1196 return (size * 4096 + scale / 2) / scale;
1199 static unsigned int calc_generic_scale(unsigned int input, unsigned int output)
1201 return (input * 4096 + output / 2) / output;
1204 /* Get and store current client crop */
1205 static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect)
1207 struct v4l2_crop crop;
1208 struct v4l2_cropcap cap;
1211 crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1213 ret = v4l2_subdev_call(sd, video, g_crop, &crop);
1219 /* Camera driver doesn't support .g_crop(), assume default rectangle */
1220 cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1222 ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1224 *rect = cap.defrect;
1229 /* Client crop has changed, update our sub-rectangle to remain within the area */
1230 static void update_subrect(struct sh_mobile_ceu_cam *cam)
1232 struct v4l2_rect *rect = &cam->rect, *subrect = &cam->subrect;
1234 if (rect->width < subrect->width)
1235 subrect->width = rect->width;
1237 if (rect->height < subrect->height)
1238 subrect->height = rect->height;
1240 if (rect->left > subrect->left)
1241 subrect->left = rect->left;
1242 else if (rect->left + rect->width >
1243 subrect->left + subrect->width)
1244 subrect->left = rect->left + rect->width -
1247 if (rect->top > subrect->top)
1248 subrect->top = rect->top;
1249 else if (rect->top + rect->height >
1250 subrect->top + subrect->height)
1251 subrect->top = rect->top + rect->height -
1256 * The common for both scaling and cropping iterative approach is:
1257 * 1. try if the client can produce exactly what requested by the user
1258 * 2. if (1) failed, try to double the client image until we get one big enough
1259 * 3. if (2) failed, try to request the maximum image
1261 static int client_s_crop(struct soc_camera_device *icd, struct v4l2_crop *crop,
1262 struct v4l2_crop *cam_crop)
1264 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1265 struct v4l2_rect *rect = &crop->c, *cam_rect = &cam_crop->c;
1266 struct device *dev = sd->v4l2_dev->dev;
1267 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1268 struct v4l2_cropcap cap;
1270 unsigned int width, height;
1272 v4l2_subdev_call(sd, video, s_crop, crop);
1273 ret = client_g_rect(sd, cam_rect);
1278 * Now cam_crop contains the current camera input rectangle, and it must
1279 * be within camera cropcap bounds
1281 if (!memcmp(rect, cam_rect, sizeof(*rect))) {
1282 /* Even if camera S_CROP failed, but camera rectangle matches */
1283 dev_dbg(dev, "Camera S_CROP successful for %dx%d@%d:%d\n",
1284 rect->width, rect->height, rect->left, rect->top);
1285 cam->rect = *cam_rect;
1289 /* Try to fix cropping, that camera hasn't managed to set */
1290 dev_geo(dev, "Fix camera S_CROP for %dx%d@%d:%d to %dx%d@%d:%d\n",
1291 cam_rect->width, cam_rect->height,
1292 cam_rect->left, cam_rect->top,
1293 rect->width, rect->height, rect->left, rect->top);
1295 /* We need sensor maximum rectangle */
1296 ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1300 /* Put user requested rectangle within sensor bounds */
1301 soc_camera_limit_side(&rect->left, &rect->width, cap.bounds.left, 2,
1303 soc_camera_limit_side(&rect->top, &rect->height, cap.bounds.top, 4,
1307 * Popular special case - some cameras can only handle fixed sizes like
1308 * QVGA, VGA,... Take care to avoid infinite loop.
1310 width = max(cam_rect->width, 2);
1311 height = max(cam_rect->height, 2);
1314 * Loop as long as sensor is not covering the requested rectangle and
1315 * is still within its bounds
1317 while (!ret && (is_smaller(cam_rect, rect) ||
1318 is_inside(cam_rect, rect)) &&
1319 (cap.bounds.width > width || cap.bounds.height > height)) {
1324 cam_rect->width = width;
1325 cam_rect->height = height;
1328 * We do not know what capabilities the camera has to set up
1329 * left and top borders. We could try to be smarter in iterating
1330 * them, e.g., if camera current left is to the right of the
1331 * target left, set it to the middle point between the current
1332 * left and minimum left. But that would add too much
1333 * complexity: we would have to iterate each border separately.
1334 * Instead we just drop to the left and top bounds.
1336 if (cam_rect->left > rect->left)
1337 cam_rect->left = cap.bounds.left;
1339 if (cam_rect->left + cam_rect->width < rect->left + rect->width)
1340 cam_rect->width = rect->left + rect->width -
1343 if (cam_rect->top > rect->top)
1344 cam_rect->top = cap.bounds.top;
1346 if (cam_rect->top + cam_rect->height < rect->top + rect->height)
1347 cam_rect->height = rect->top + rect->height -
1350 v4l2_subdev_call(sd, video, s_crop, cam_crop);
1351 ret = client_g_rect(sd, cam_rect);
1352 dev_geo(dev, "Camera S_CROP %d for %dx%d@%d:%d\n", ret,
1353 cam_rect->width, cam_rect->height,
1354 cam_rect->left, cam_rect->top);
1357 /* S_CROP must not modify the rectangle */
1358 if (is_smaller(cam_rect, rect) || is_inside(cam_rect, rect)) {
1360 * The camera failed to configure a suitable cropping,
1361 * we cannot use the current rectangle, set to max
1363 *cam_rect = cap.bounds;
1364 v4l2_subdev_call(sd, video, s_crop, cam_crop);
1365 ret = client_g_rect(sd, cam_rect);
1366 dev_geo(dev, "Camera S_CROP %d for max %dx%d@%d:%d\n", ret,
1367 cam_rect->width, cam_rect->height,
1368 cam_rect->left, cam_rect->top);
1372 cam->rect = *cam_rect;
1373 update_subrect(cam);
1379 /* Iterative s_mbus_fmt, also updates cached client crop on success */
1380 static int client_s_fmt(struct soc_camera_device *icd,
1381 struct v4l2_mbus_framefmt *mf, bool ceu_can_scale)
1383 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1384 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1385 struct device *dev = icd->parent;
1386 unsigned int width = mf->width, height = mf->height, tmp_w, tmp_h;
1387 unsigned int max_width, max_height;
1388 struct v4l2_cropcap cap;
1392 ret = v4l2_device_call_until_err(sd->v4l2_dev, (long)icd, video,
1397 dev_geo(dev, "camera scaled to %ux%u\n", mf->width, mf->height);
1399 if (width == mf->width && height == mf->height) {
1400 /* Perfect! The client has done it all. */
1409 cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1411 ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1415 max_width = min(cap.bounds.width, 2560);
1416 max_height = min(cap.bounds.height, 1920);
1418 /* Camera set a format, but geometry is not precise, try to improve */
1422 /* width <= max_width && height <= max_height - guaranteed by try_fmt */
1423 while ((width > tmp_w || height > tmp_h) &&
1424 tmp_w < max_width && tmp_h < max_height) {
1425 tmp_w = min(2 * tmp_w, max_width);
1426 tmp_h = min(2 * tmp_h, max_height);
1429 ret = v4l2_device_call_until_err(sd->v4l2_dev, (long)icd, video,
1431 dev_geo(dev, "Camera scaled to %ux%u\n",
1432 mf->width, mf->height);
1434 /* This shouldn't happen */
1435 dev_err(dev, "Client failed to set format: %d\n", ret);
1442 ret = client_g_rect(sd, &cam->rect);
1447 cam->subrect = cam->rect;
1449 update_subrect(cam);
1455 * @width - on output: user width, mapped back to input
1456 * @height - on output: user height, mapped back to input
1457 * @mf - in- / output camera output window
1459 static int client_scale(struct soc_camera_device *icd,
1460 struct v4l2_mbus_framefmt *mf,
1461 unsigned int *width, unsigned int *height,
1464 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1465 struct device *dev = icd->parent;
1466 struct v4l2_mbus_framefmt mf_tmp = *mf;
1467 unsigned int scale_h, scale_v;
1471 * 5. Apply iterative camera S_FMT for camera user window (also updates
1472 * client crop cache and the imaginary sub-rectangle).
1474 ret = client_s_fmt(icd, &mf_tmp, ceu_can_scale);
1478 dev_geo(dev, "5: camera scaled to %ux%u\n",
1479 mf_tmp.width, mf_tmp.height);
1481 /* 6. Retrieve camera output window (g_fmt) */
1483 /* unneeded - it is already in "mf_tmp" */
1485 /* 7. Calculate new client scales. */
1486 scale_h = calc_generic_scale(cam->rect.width, mf_tmp.width);
1487 scale_v = calc_generic_scale(cam->rect.height, mf_tmp.height);
1489 mf->width = mf_tmp.width;
1490 mf->height = mf_tmp.height;
1491 mf->colorspace = mf_tmp.colorspace;
1494 * 8. Calculate new CEU crop - apply camera scales to previously
1495 * updated "effective" crop.
1497 *width = scale_down(cam->subrect.width, scale_h);
1498 *height = scale_down(cam->subrect.height, scale_v);
1500 dev_geo(dev, "8: new client sub-window %ux%u\n", *width, *height);
1506 * CEU can scale and crop, but we don't want to waste bandwidth and kill the
1507 * framerate by always requesting the maximum image from the client. See
1508 * Documentation/video4linux/sh_mobile_ceu_camera.txt for a description of
1509 * scaling and cropping algorithms and for the meaning of referenced here steps.
1511 static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd,
1512 struct v4l2_crop *a)
1514 struct v4l2_rect *rect = &a->c;
1515 struct device *dev = icd->parent;
1516 struct soc_camera_host *ici = to_soc_camera_host(dev);
1517 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1518 struct v4l2_crop cam_crop;
1519 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1520 struct v4l2_rect *cam_rect = &cam_crop.c;
1521 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1522 struct v4l2_mbus_framefmt mf;
1523 unsigned int scale_cam_h, scale_cam_v, scale_ceu_h, scale_ceu_v,
1524 out_width, out_height;
1525 int interm_width, interm_height;
1529 dev_geo(dev, "S_CROP(%ux%u@%u:%u)\n", rect->width, rect->height,
1530 rect->left, rect->top);
1532 /* During camera cropping its output window can change too, stop CEU */
1533 capsr = capture_save_reset(pcdev);
1534 dev_dbg(dev, "CAPSR 0x%x, CFLCR 0x%x\n", capsr, pcdev->cflcr);
1537 * 1. - 2. Apply iterative camera S_CROP for new input window, read back
1538 * actual camera rectangle.
1540 ret = client_s_crop(icd, a, &cam_crop);
1544 dev_geo(dev, "1-2: camera cropped to %ux%u@%u:%u\n",
1545 cam_rect->width, cam_rect->height,
1546 cam_rect->left, cam_rect->top);
1548 /* On success cam_crop contains current camera crop */
1550 /* 3. Retrieve camera output window */
1551 ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
1555 if (mf.width > 2560 || mf.height > 1920)
1558 /* 4. Calculate camera scales */
1559 scale_cam_h = calc_generic_scale(cam_rect->width, mf.width);
1560 scale_cam_v = calc_generic_scale(cam_rect->height, mf.height);
1562 /* Calculate intermediate window */
1563 interm_width = scale_down(rect->width, scale_cam_h);
1564 interm_height = scale_down(rect->height, scale_cam_v);
1566 if (interm_width < icd->user_width) {
1569 new_scale_h = calc_generic_scale(rect->width, icd->user_width);
1571 mf.width = scale_down(cam_rect->width, new_scale_h);
1574 if (interm_height < icd->user_height) {
1577 new_scale_v = calc_generic_scale(rect->height, icd->user_height);
1579 mf.height = scale_down(cam_rect->height, new_scale_v);
1582 if (interm_width < icd->user_width || interm_height < icd->user_height) {
1583 ret = v4l2_device_call_until_err(sd->v4l2_dev, (int)icd, video,
1588 dev_geo(dev, "New camera output %ux%u\n", mf.width, mf.height);
1589 scale_cam_h = calc_generic_scale(cam_rect->width, mf.width);
1590 scale_cam_v = calc_generic_scale(cam_rect->height, mf.height);
1591 interm_width = scale_down(rect->width, scale_cam_h);
1592 interm_height = scale_down(rect->height, scale_cam_v);
1595 /* Cache camera output window */
1596 cam->width = mf.width;
1597 cam->height = mf.height;
1599 if (pcdev->image_mode) {
1600 out_width = min(interm_width, icd->user_width);
1601 out_height = min(interm_height, icd->user_height);
1603 out_width = interm_width;
1604 out_height = interm_height;
1608 * 5. Calculate CEU scales from camera scales from results of (5) and
1611 scale_ceu_h = calc_scale(interm_width, &out_width);
1612 scale_ceu_v = calc_scale(interm_height, &out_height);
1614 dev_geo(dev, "5: CEU scales %u:%u\n", scale_ceu_h, scale_ceu_v);
1616 /* Apply CEU scales. */
1617 cflcr = scale_ceu_h | (scale_ceu_v << 16);
1618 if (cflcr != pcdev->cflcr) {
1619 pcdev->cflcr = cflcr;
1620 ceu_write(pcdev, CFLCR, cflcr);
1623 icd->user_width = out_width & ~3;
1624 icd->user_height = out_height & ~3;
1625 /* Offsets are applied at the CEU scaling filter input */
1626 cam->ceu_left = scale_down(rect->left - cam_rect->left, scale_cam_h) & ~1;
1627 cam->ceu_top = scale_down(rect->top - cam_rect->top, scale_cam_v) & ~1;
1629 /* 6. Use CEU cropping to crop to the new window. */
1630 sh_mobile_ceu_set_rect(icd);
1632 cam->subrect = *rect;
1634 dev_geo(dev, "6: CEU cropped to %ux%u@%u:%u\n",
1635 icd->user_width, icd->user_height,
1636 cam->ceu_left, cam->ceu_top);
1638 /* Restore capture. The CE bit can be cleared by the hardware */
1641 capture_restore(pcdev, capsr);
1643 /* Even if only camera cropping succeeded */
1647 static int sh_mobile_ceu_get_crop(struct soc_camera_device *icd,
1648 struct v4l2_crop *a)
1650 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1652 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1653 a->c = cam->subrect;
1659 * Calculate real client output window by applying new scales to the current
1660 * client crop. New scales are calculated from the requested output format and
1661 * CEU crop, mapped backed onto the client input (subrect).
1663 static void calculate_client_output(struct soc_camera_device *icd,
1664 const struct v4l2_pix_format *pix, struct v4l2_mbus_framefmt *mf)
1666 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1667 struct device *dev = icd->parent;
1668 struct v4l2_rect *cam_subrect = &cam->subrect;
1669 unsigned int scale_v, scale_h;
1671 if (cam_subrect->width == cam->rect.width &&
1672 cam_subrect->height == cam->rect.height) {
1673 /* No sub-cropping */
1674 mf->width = pix->width;
1675 mf->height = pix->height;
1679 /* 1.-2. Current camera scales and subwin - cached. */
1681 dev_geo(dev, "2: subwin %ux%u@%u:%u\n",
1682 cam_subrect->width, cam_subrect->height,
1683 cam_subrect->left, cam_subrect->top);
1686 * 3. Calculate new combined scales from input sub-window to requested
1691 * TODO: CEU cannot scale images larger than VGA to smaller than SubQCIF
1692 * (128x96) or larger than VGA
1694 scale_h = calc_generic_scale(cam_subrect->width, pix->width);
1695 scale_v = calc_generic_scale(cam_subrect->height, pix->height);
1697 dev_geo(dev, "3: scales %u:%u\n", scale_h, scale_v);
1700 * 4. Calculate desired client output window by applying combined scales
1701 * to client (real) input window.
1703 mf->width = scale_down(cam->rect.width, scale_h);
1704 mf->height = scale_down(cam->rect.height, scale_v);
1707 /* Similar to set_crop multistage iterative algorithm */
1708 static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
1709 struct v4l2_format *f)
1711 struct device *dev = icd->parent;
1712 struct soc_camera_host *ici = to_soc_camera_host(dev);
1713 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1714 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1715 struct v4l2_pix_format *pix = &f->fmt.pix;
1716 struct v4l2_mbus_framefmt mf;
1717 __u32 pixfmt = pix->pixelformat;
1718 const struct soc_camera_format_xlate *xlate;
1719 /* Keep Compiler Happy */
1720 unsigned int ceu_sub_width = 0, ceu_sub_height = 0;
1721 u16 scale_v, scale_h;
1724 enum v4l2_field field;
1726 switch (pix->field) {
1728 pix->field = V4L2_FIELD_NONE;
1730 case V4L2_FIELD_INTERLACED_TB:
1731 case V4L2_FIELD_INTERLACED_BT:
1732 case V4L2_FIELD_NONE:
1735 case V4L2_FIELD_INTERLACED:
1736 field = V4L2_FIELD_INTERLACED_TB;
1740 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1742 dev_warn(dev, "Format %x not found\n", pixfmt);
1746 /* 1.-4. Calculate desired client output geometry */
1747 calculate_client_output(icd, pix, &mf);
1748 mf.field = pix->field;
1749 mf.colorspace = pix->colorspace;
1750 mf.code = xlate->code;
1753 case V4L2_PIX_FMT_NV12:
1754 case V4L2_PIX_FMT_NV21:
1755 case V4L2_PIX_FMT_NV16:
1756 case V4L2_PIX_FMT_NV61:
1763 dev_geo(dev, "S_FMT(pix=0x%x, fld 0x%x, code 0x%x, %ux%u)\n", pixfmt, mf.field, mf.code,
1764 pix->width, pix->height);
1766 dev_geo(dev, "4: request camera output %ux%u\n", mf.width, mf.height);
1769 ret = client_scale(icd, &mf, &ceu_sub_width, &ceu_sub_height,
1770 image_mode && V4L2_FIELD_NONE == field);
1772 dev_geo(dev, "5-9: client scale return %d\n", ret);
1774 /* Done with the camera. Now see if we can improve the result */
1776 dev_geo(dev, "fmt %ux%u, requested %ux%u\n",
1777 mf.width, mf.height, pix->width, pix->height);
1781 if (mf.code != xlate->code)
1784 /* 9. Prepare CEU crop */
1785 cam->width = mf.width;
1786 cam->height = mf.height;
1788 /* 10. Use CEU scaling to scale to the requested user window. */
1790 /* We cannot scale up */
1791 if (pix->width > ceu_sub_width)
1792 ceu_sub_width = pix->width;
1794 if (pix->height > ceu_sub_height)
1795 ceu_sub_height = pix->height;
1797 pix->colorspace = mf.colorspace;
1800 /* Scale pix->{width x height} down to width x height */
1801 scale_h = calc_scale(ceu_sub_width, &pix->width);
1802 scale_v = calc_scale(ceu_sub_height, &pix->height);
1804 pix->width = ceu_sub_width;
1805 pix->height = ceu_sub_height;
1810 pcdev->cflcr = scale_h | (scale_v << 16);
1813 * We have calculated CFLCR, the actual configuration will be performed
1814 * in sh_mobile_ceu_set_bus_param()
1817 dev_geo(dev, "10: W: %u : 0x%x = %u, H: %u : 0x%x = %u\n",
1818 ceu_sub_width, scale_h, pix->width,
1819 ceu_sub_height, scale_v, pix->height);
1821 cam->code = xlate->code;
1822 icd->current_fmt = xlate;
1824 pcdev->field = field;
1825 pcdev->image_mode = image_mode;
1827 /* CFSZR requirement */
1834 static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
1835 struct v4l2_format *f)
1837 const struct soc_camera_format_xlate *xlate;
1838 struct v4l2_pix_format *pix = &f->fmt.pix;
1839 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1840 struct v4l2_mbus_framefmt mf;
1841 __u32 pixfmt = pix->pixelformat;
1845 dev_geo(icd->parent, "TRY_FMT(pix=0x%x, %ux%u)\n",
1846 pixfmt, pix->width, pix->height);
1848 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1850 dev_warn(icd->parent, "Format %x not found\n", pixfmt);
1854 /* FIXME: calculate using depth and bus width */
1856 /* CFSZR requires height and width to be 4-pixel aligned */
1857 v4l_bound_align_image(&pix->width, 2, 2560, 2,
1858 &pix->height, 4, 1920, 2, 0);
1861 height = pix->height;
1863 /* limit to sensor capabilities */
1864 mf.width = pix->width;
1865 mf.height = pix->height;
1866 mf.field = pix->field;
1867 mf.code = xlate->code;
1868 mf.colorspace = pix->colorspace;
1870 ret = v4l2_device_call_until_err(sd->v4l2_dev, (long)icd, video, try_mbus_fmt, &mf);
1874 pix->width = mf.width;
1875 pix->height = mf.height;
1876 pix->field = mf.field;
1877 pix->colorspace = mf.colorspace;
1880 case V4L2_PIX_FMT_NV12:
1881 case V4L2_PIX_FMT_NV21:
1882 case V4L2_PIX_FMT_NV16:
1883 case V4L2_PIX_FMT_NV61:
1884 /* FIXME: check against rect_max after converting soc-camera */
1885 /* We can scale precisely, need a bigger image from camera */
1886 if (pix->width < width || pix->height < height) {
1888 * We presume, the sensor behaves sanely, i.e., if
1889 * requested a bigger rectangle, it will not return a
1894 ret = v4l2_device_call_until_err(sd->v4l2_dev, (long)icd, video,
1897 /* Shouldn't actually happen... */
1898 dev_err(icd->parent,
1899 "FIXME: client try_fmt() = %d\n", ret);
1903 /* We will scale exactly */
1904 if (mf.width > width)
1906 if (mf.height > height)
1907 pix->height = height;
1913 dev_geo(icd->parent, "%s(): return %d, fmt 0x%x, %ux%u\n",
1914 __func__, ret, pix->pixelformat, pix->width, pix->height);
1919 static int sh_mobile_ceu_set_livecrop(struct soc_camera_device *icd,
1920 struct v4l2_crop *a)
1922 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1923 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1924 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1925 u32 out_width = icd->user_width, out_height = icd->user_height;
1930 /* Wait for frame */
1931 ret = wait_for_completion_interruptible(&pcdev->complete);
1932 /* Stop the client */
1933 ret = v4l2_subdev_call(sd, video, s_stream, 0);
1935 dev_warn(icd->parent,
1936 "Client failed to stop the stream: %d\n", ret);
1938 /* Do the crop, if it fails, there's nothing more we can do */
1939 sh_mobile_ceu_set_crop(icd, a);
1941 dev_geo(icd->parent, "Output after crop: %ux%u\n", icd->user_width, icd->user_height);
1943 if (icd->user_width != out_width || icd->user_height != out_height) {
1944 struct v4l2_format f = {
1945 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1948 .height = out_height,
1949 .pixelformat = icd->current_fmt->host_fmt->fourcc,
1950 .field = pcdev->field,
1951 .colorspace = icd->colorspace,
1954 ret = sh_mobile_ceu_set_fmt(icd, &f);
1955 if (!ret && (out_width != f.fmt.pix.width ||
1956 out_height != f.fmt.pix.height))
1959 icd->user_width = out_width & ~3;
1960 icd->user_height = out_height & ~3;
1961 ret = sh_mobile_ceu_set_bus_param(icd,
1962 icd->current_fmt->host_fmt->fourcc);
1966 /* Thaw the queue */
1968 spin_lock_irq(&pcdev->lock);
1969 sh_mobile_ceu_capture(pcdev);
1970 spin_unlock_irq(&pcdev->lock);
1971 /* Start the client */
1972 ret = v4l2_subdev_call(sd, video, s_stream, 1);
1976 static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
1978 struct soc_camera_device *icd = file->private_data;
1980 return vb2_poll(&icd->vb2_vidq, file, pt);
1983 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
1984 struct v4l2_capability *cap)
1986 strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
1987 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1991 static int sh_mobile_ceu_init_videobuf(struct vb2_queue *q,
1992 struct soc_camera_device *icd)
1994 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1995 q->io_modes = VB2_MMAP | VB2_USERPTR;
1997 q->ops = &sh_mobile_ceu_videobuf_ops;
1998 q->mem_ops = &vb2_dma_contig_memops;
1999 q->buf_struct_size = sizeof(struct sh_mobile_ceu_buffer);
2001 return vb2_queue_init(q);
2004 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
2005 .owner = THIS_MODULE,
2006 .add = sh_mobile_ceu_add_device,
2007 .remove = sh_mobile_ceu_remove_device,
2008 .get_formats = sh_mobile_ceu_get_formats,
2009 .put_formats = sh_mobile_ceu_put_formats,
2010 .get_crop = sh_mobile_ceu_get_crop,
2011 .set_crop = sh_mobile_ceu_set_crop,
2012 .set_livecrop = sh_mobile_ceu_set_livecrop,
2013 .set_fmt = sh_mobile_ceu_set_fmt,
2014 .try_fmt = sh_mobile_ceu_try_fmt,
2015 .poll = sh_mobile_ceu_poll,
2016 .querycap = sh_mobile_ceu_querycap,
2017 .set_bus_param = sh_mobile_ceu_set_bus_param,
2018 .init_videobuf2 = sh_mobile_ceu_init_videobuf,
2022 struct notifier_block notifier;
2023 struct completion completion;
2027 static int bus_notify(struct notifier_block *nb,
2028 unsigned long action, void *data)
2030 struct device *dev = data;
2031 struct bus_wait *wait = container_of(nb, struct bus_wait, notifier);
2033 if (wait->dev != dev)
2037 case BUS_NOTIFY_UNBOUND_DRIVER:
2038 /* Protect from module unloading */
2039 wait_for_completion(&wait->completion);
2045 static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev)
2047 struct sh_mobile_ceu_dev *pcdev;
2048 struct resource *res;
2052 struct bus_wait wait = {
2053 .completion = COMPLETION_INITIALIZER_ONSTACK(wait.completion),
2054 .notifier.notifier_call = bus_notify,
2056 struct sh_mobile_ceu_companion *csi2;
2058 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2059 irq = platform_get_irq(pdev, 0);
2060 if (!res || (int)irq <= 0) {
2061 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
2066 pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
2068 dev_err(&pdev->dev, "Could not allocate pcdev\n");
2073 INIT_LIST_HEAD(&pcdev->capture);
2074 spin_lock_init(&pcdev->lock);
2075 init_completion(&pcdev->complete);
2077 pcdev->pdata = pdev->dev.platform_data;
2078 if (!pcdev->pdata) {
2080 dev_err(&pdev->dev, "CEU platform data not set.\n");
2084 base = ioremap_nocache(res->start, resource_size(res));
2087 dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
2093 pcdev->video_limit = 0; /* only enabled if second resource exists */
2095 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2097 err = dma_declare_coherent_memory(&pdev->dev, res->start,
2101 DMA_MEMORY_EXCLUSIVE);
2103 dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
2108 pcdev->video_limit = resource_size(res);
2112 err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
2113 dev_name(&pdev->dev), pcdev);
2115 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
2116 goto exit_release_mem;
2119 pm_suspend_ignore_children(&pdev->dev, true);
2120 pm_runtime_enable(&pdev->dev);
2121 pm_runtime_resume(&pdev->dev);
2123 pcdev->ici.priv = pcdev;
2124 pcdev->ici.v4l2_dev.dev = &pdev->dev;
2125 pcdev->ici.nr = pdev->id;
2126 pcdev->ici.drv_name = dev_name(&pdev->dev);
2127 pcdev->ici.ops = &sh_mobile_ceu_host_ops;
2129 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
2130 if (IS_ERR(pcdev->alloc_ctx)) {
2131 err = PTR_ERR(pcdev->alloc_ctx);
2135 err = soc_camera_host_register(&pcdev->ici);
2139 /* CSI2 interfacing */
2140 csi2 = pcdev->pdata->csi2;
2142 struct platform_device *csi2_pdev =
2143 platform_device_alloc("sh-mobile-csi2", csi2->id);
2144 struct sh_csi2_pdata *csi2_pdata = csi2->platform_data;
2148 goto exit_host_unregister;
2151 pcdev->csi2_pdev = csi2_pdev;
2153 err = platform_device_add_data(csi2_pdev, csi2_pdata, sizeof(*csi2_pdata));
2157 csi2_pdata = csi2_pdev->dev.platform_data;
2158 csi2_pdata->v4l2_dev = &pcdev->ici.v4l2_dev;
2160 csi2_pdev->resource = csi2->resource;
2161 csi2_pdev->num_resources = csi2->num_resources;
2163 err = platform_device_add(csi2_pdev);
2167 wait.dev = &csi2_pdev->dev;
2169 err = bus_register_notifier(&platform_bus_type, &wait.notifier);
2171 goto exit_pdev_unregister;
2174 * From this point the driver module will not unload, until
2175 * we complete the completion.
2178 if (!csi2_pdev->dev.driver) {
2179 complete(&wait.completion);
2180 /* Either too late, or probing failed */
2181 bus_unregister_notifier(&platform_bus_type, &wait.notifier);
2183 goto exit_pdev_unregister;
2187 * The module is still loaded, in the worst case it is hanging
2188 * in device release on our completion. So, _now_ dereferencing
2189 * the "owner" is safe!
2192 err = try_module_get(csi2_pdev->dev.driver->owner);
2194 /* Let notifier complete, if it has been locked */
2195 complete(&wait.completion);
2196 bus_unregister_notifier(&platform_bus_type, &wait.notifier);
2199 goto exit_pdev_unregister;
2205 exit_pdev_unregister:
2206 platform_device_del(pcdev->csi2_pdev);
2208 pcdev->csi2_pdev->resource = NULL;
2209 platform_device_put(pcdev->csi2_pdev);
2210 exit_host_unregister:
2211 soc_camera_host_unregister(&pcdev->ici);
2213 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
2215 pm_runtime_disable(&pdev->dev);
2216 free_irq(pcdev->irq, pcdev);
2218 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
2219 dma_release_declared_memory(&pdev->dev);
2228 static int __devexit sh_mobile_ceu_remove(struct platform_device *pdev)
2230 struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
2231 struct sh_mobile_ceu_dev *pcdev = container_of(soc_host,
2232 struct sh_mobile_ceu_dev, ici);
2233 struct platform_device *csi2_pdev = pcdev->csi2_pdev;
2235 soc_camera_host_unregister(soc_host);
2236 pm_runtime_disable(&pdev->dev);
2237 free_irq(pcdev->irq, pcdev);
2238 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
2239 dma_release_declared_memory(&pdev->dev);
2240 iounmap(pcdev->base);
2241 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
2242 if (csi2_pdev && csi2_pdev->dev.driver) {
2243 struct module *csi2_drv = csi2_pdev->dev.driver->owner;
2244 platform_device_del(csi2_pdev);
2245 csi2_pdev->resource = NULL;
2246 platform_device_put(csi2_pdev);
2247 module_put(csi2_drv);
2254 static int sh_mobile_ceu_runtime_nop(struct device *dev)
2256 /* Runtime PM callback shared between ->runtime_suspend()
2257 * and ->runtime_resume(). Simply returns success.
2259 * This driver re-initializes all registers after
2260 * pm_runtime_get_sync() anyway so there is no need
2261 * to save and restore registers here.
2266 static const struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = {
2267 .runtime_suspend = sh_mobile_ceu_runtime_nop,
2268 .runtime_resume = sh_mobile_ceu_runtime_nop,
2271 static struct platform_driver sh_mobile_ceu_driver = {
2273 .name = "sh_mobile_ceu",
2274 .pm = &sh_mobile_ceu_dev_pm_ops,
2276 .probe = sh_mobile_ceu_probe,
2277 .remove = __devexit_p(sh_mobile_ceu_remove),
2280 static int __init sh_mobile_ceu_init(void)
2282 /* Whatever return code */
2283 request_module("sh_mobile_csi2");
2284 return platform_driver_register(&sh_mobile_ceu_driver);
2287 static void __exit sh_mobile_ceu_exit(void)
2289 platform_driver_unregister(&sh_mobile_ceu_driver);
2292 module_init(sh_mobile_ceu_init);
2293 module_exit(sh_mobile_ceu_exit);
2295 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
2296 MODULE_AUTHOR("Magnus Damm");
2297 MODULE_LICENSE("GPL");
2298 MODULE_VERSION("0.0.6");
2299 MODULE_ALIAS("platform:sh_mobile_ceu");