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;
93 enum v4l2_mbus_pixelcode code;
96 struct sh_mobile_ceu_dev {
97 struct soc_camera_host ici;
98 struct soc_camera_device *icd;
99 struct platform_device *csi2_pdev;
103 unsigned long video_limit;
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 unsigned long make_bus_param(struct sh_mobile_ceu_dev *pcdev)
151 flags = SOCAM_MASTER |
152 SOCAM_PCLK_SAMPLE_RISING |
153 SOCAM_HSYNC_ACTIVE_HIGH |
154 SOCAM_HSYNC_ACTIVE_LOW |
155 SOCAM_VSYNC_ACTIVE_HIGH |
156 SOCAM_VSYNC_ACTIVE_LOW |
157 SOCAM_DATA_ACTIVE_HIGH;
159 if (pcdev->pdata->flags & SH_CEU_FLAG_USE_8BIT_BUS)
160 flags |= SOCAM_DATAWIDTH_8;
162 if (pcdev->pdata->flags & SH_CEU_FLAG_USE_16BIT_BUS)
163 flags |= SOCAM_DATAWIDTH_16;
165 if (flags & SOCAM_DATAWIDTH_MASK)
171 static void ceu_write(struct sh_mobile_ceu_dev *priv,
172 unsigned long reg_offs, u32 data)
174 iowrite32(data, priv->base + reg_offs);
177 static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
179 return ioread32(priv->base + reg_offs);
182 static int sh_mobile_ceu_soft_reset(struct sh_mobile_ceu_dev *pcdev)
185 struct soc_camera_device *icd = pcdev->icd;
187 ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
189 /* wait CSTSR.CPTON bit */
190 for (i = 0; i < 1000; i++) {
191 if (!(ceu_read(pcdev, CSTSR) & 1)) {
198 /* wait CAPSR.CPKIL bit */
199 for (i = 0; i < 1000; i++) {
200 if (!(ceu_read(pcdev, CAPSR) & (1 << 16))) {
209 dev_warn(icd->pdev, "soft reset time out\n");
217 * Videobuf operations
219 static int sh_mobile_ceu_videobuf_setup(struct vb2_queue *vq,
220 unsigned int *count, unsigned int *num_planes,
221 unsigned int sizes[], void *alloc_ctxs[])
223 struct soc_camera_device *icd = container_of(vq, struct soc_camera_device, vb2_vidq);
224 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
225 struct sh_mobile_ceu_dev *pcdev = ici->priv;
226 int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
227 icd->current_fmt->host_fmt);
229 if (bytes_per_line < 0)
230 return bytes_per_line;
235 sizes[0] = bytes_per_line * icd->user_height;
236 alloc_ctxs[0] = pcdev->alloc_ctx;
241 if (pcdev->video_limit) {
242 if (PAGE_ALIGN(sizes[0]) * *count > pcdev->video_limit)
243 *count = pcdev->video_limit / PAGE_ALIGN(sizes[0]);
246 dev_dbg(icd->parent, "count=%d, size=%u\n", *count, sizes[0]);
251 #define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
252 #define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
253 #define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
254 #define CEU_CEIER_VBP (1 << 20) /* vbp error */
255 #define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
256 #define CEU_CEIER_MASK (CEU_CEIER_CPEIE | CEU_CEIER_VBP)
260 * return value doesn't reflex the success/failure to queue the new buffer,
261 * but rather the status of the previous buffer.
263 static int sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
265 struct soc_camera_device *icd = pcdev->icd;
266 dma_addr_t phys_addr_top, phys_addr_bottom;
267 unsigned long top1, top2;
268 unsigned long bottom1, bottom2;
274 * The hardware is _very_ picky about this sequence. Especially
275 * the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
276 * several not-so-well documented interrupt sources in CETCR.
278 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_MASK);
279 status = ceu_read(pcdev, CETCR);
280 ceu_write(pcdev, CETCR, ~status & CEU_CETCR_MAGIC);
282 ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_MASK);
283 ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
284 ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
287 * When a VBP interrupt occurs, a capture end interrupt does not occur
288 * and the image of that frame is not captured correctly. So, soft reset
291 if (status & CEU_CEIER_VBP) {
292 sh_mobile_ceu_soft_reset(pcdev);
297 complete(&pcdev->complete);
304 if (V4L2_FIELD_INTERLACED_BT == pcdev->field) {
316 phys_addr_top = vb2_dma_contig_plane_dma_addr(pcdev->active, 0);
318 switch (icd->current_fmt->host_fmt->fourcc) {
319 case V4L2_PIX_FMT_NV12:
320 case V4L2_PIX_FMT_NV21:
321 case V4L2_PIX_FMT_NV16:
322 case V4L2_PIX_FMT_NV61:
329 ceu_write(pcdev, top1, phys_addr_top);
330 if (V4L2_FIELD_NONE != pcdev->field) {
332 phys_addr_bottom = phys_addr_top + icd->user_width;
334 phys_addr_bottom = phys_addr_top +
335 soc_mbus_bytes_per_line(icd->user_width,
336 icd->current_fmt->host_fmt);
337 ceu_write(pcdev, bottom1, phys_addr_bottom);
341 phys_addr_top += icd->user_width *
343 ceu_write(pcdev, top2, phys_addr_top);
344 if (V4L2_FIELD_NONE != pcdev->field) {
345 phys_addr_bottom = phys_addr_top + icd->user_width;
346 ceu_write(pcdev, bottom2, phys_addr_bottom);
350 ceu_write(pcdev, CAPSR, 0x1); /* start capture */
355 static int sh_mobile_ceu_videobuf_prepare(struct vb2_buffer *vb)
357 struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq);
358 struct sh_mobile_ceu_buffer *buf;
359 int bytes_per_line = soc_mbus_bytes_per_line(icd->user_width,
360 icd->current_fmt->host_fmt);
363 if (bytes_per_line < 0)
364 return bytes_per_line;
368 dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
369 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
371 /* Added list head initialization on alloc */
372 WARN(!list_empty(&buf->queue), "Buffer %p on queue!\n", vb);
376 * This can be useful if you want to see if we actually fill
377 * the buffer with something
379 if (vb2_plane_vaddr(vb, 0))
380 memset(vb2_plane_vaddr(vb, 0), 0xaa, vb2_get_plane_payload(vb, 0));
383 BUG_ON(NULL == icd->current_fmt);
385 size = icd->user_height * bytes_per_line;
387 if (vb2_plane_size(vb, 0) < size) {
388 dev_err(icd->parent, "Buffer too small (%lu < %lu)\n",
389 vb2_plane_size(vb, 0), size);
393 vb2_set_plane_payload(vb, 0, size);
398 static void sh_mobile_ceu_videobuf_queue(struct vb2_buffer *vb)
400 struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq);
401 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
402 struct sh_mobile_ceu_dev *pcdev = ici->priv;
403 struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb);
405 dev_dbg(icd->parent, "%s (vb=0x%p) 0x%p %lu\n", __func__,
406 vb, vb2_plane_vaddr(vb, 0), vb2_get_plane_payload(vb, 0));
408 spin_lock_irq(&pcdev->lock);
409 list_add_tail(&buf->queue, &pcdev->capture);
411 if (!pcdev->active) {
413 * Because there were no active buffer at this moment,
414 * we are not interested in the return value of
415 * sh_mobile_ceu_capture here.
418 sh_mobile_ceu_capture(pcdev);
420 spin_unlock_irq(&pcdev->lock);
423 static void sh_mobile_ceu_videobuf_release(struct vb2_buffer *vb)
425 struct soc_camera_device *icd = container_of(vb->vb2_queue, struct soc_camera_device, vb2_vidq);
426 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
427 struct sh_mobile_ceu_buffer *buf = to_ceu_vb(vb);
428 struct sh_mobile_ceu_dev *pcdev = ici->priv;
430 spin_lock_irq(&pcdev->lock);
432 if (pcdev->active == vb) {
433 /* disable capture (release DMA buffer), reset */
434 ceu_write(pcdev, CAPSR, 1 << 16);
435 pcdev->active = NULL;
439 * Doesn't hurt also if the list is empty, but it hurts, if queuing the
440 * buffer failed, and .buf_init() hasn't been called
443 list_del_init(&buf->queue);
445 spin_unlock_irq(&pcdev->lock);
448 static int sh_mobile_ceu_videobuf_init(struct vb2_buffer *vb)
450 /* This is for locking debugging only */
451 INIT_LIST_HEAD(&to_ceu_vb(vb)->queue);
455 static int sh_mobile_ceu_stop_streaming(struct vb2_queue *q)
457 struct soc_camera_device *icd = container_of(q, struct soc_camera_device, vb2_vidq);
458 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
459 struct sh_mobile_ceu_dev *pcdev = ici->priv;
460 struct list_head *buf_head, *tmp;
462 spin_lock_irq(&pcdev->lock);
464 pcdev->active = NULL;
466 list_for_each_safe(buf_head, tmp, &pcdev->capture)
467 list_del_init(buf_head);
469 spin_unlock_irq(&pcdev->lock);
471 return sh_mobile_ceu_soft_reset(pcdev);
474 static struct vb2_ops sh_mobile_ceu_videobuf_ops = {
475 .queue_setup = sh_mobile_ceu_videobuf_setup,
476 .buf_prepare = sh_mobile_ceu_videobuf_prepare,
477 .buf_queue = sh_mobile_ceu_videobuf_queue,
478 .buf_cleanup = sh_mobile_ceu_videobuf_release,
479 .buf_init = sh_mobile_ceu_videobuf_init,
480 .wait_prepare = soc_camera_unlock,
481 .wait_finish = soc_camera_lock,
482 .stop_streaming = sh_mobile_ceu_stop_streaming,
485 static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
487 struct sh_mobile_ceu_dev *pcdev = data;
488 struct vb2_buffer *vb;
491 spin_lock(&pcdev->lock);
495 /* Stale interrupt from a released buffer */
498 list_del_init(&to_ceu_vb(vb)->queue);
500 if (!list_empty(&pcdev->capture))
501 pcdev->active = &list_entry(pcdev->capture.next,
502 struct sh_mobile_ceu_buffer, queue)->vb;
504 pcdev->active = NULL;
506 ret = sh_mobile_ceu_capture(pcdev);
507 do_gettimeofday(&vb->v4l2_buf.timestamp);
509 vb->v4l2_buf.field = pcdev->field;
510 vb->v4l2_buf.sequence = pcdev->sequence++;
512 vb2_buffer_done(vb, ret < 0 ? VB2_BUF_STATE_ERROR : VB2_BUF_STATE_DONE);
515 spin_unlock(&pcdev->lock);
520 static struct v4l2_subdev *find_csi2(struct sh_mobile_ceu_dev *pcdev)
522 struct v4l2_subdev *sd;
524 if (!pcdev->csi2_pdev)
527 v4l2_device_for_each_subdev(sd, &pcdev->ici.v4l2_dev)
528 if (&pcdev->csi2_pdev->dev == v4l2_get_subdevdata(sd))
534 /* Called with .video_lock held */
535 static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
537 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
538 struct sh_mobile_ceu_dev *pcdev = ici->priv;
539 struct v4l2_subdev *csi2_sd;
545 dev_info(icd->parent,
546 "SuperH Mobile CEU driver attached to camera %d\n",
549 pm_runtime_get_sync(ici->v4l2_dev.dev);
551 ret = sh_mobile_ceu_soft_reset(pcdev);
553 csi2_sd = find_csi2(pcdev);
555 ret = v4l2_subdev_call(csi2_sd, core, s_power, 1);
556 if (ret != -ENODEV && ret != -ENOIOCTLCMD && ret < 0) {
557 pm_runtime_put_sync(ici->v4l2_dev.dev);
566 /* Called with .video_lock held */
567 static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
569 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
570 struct sh_mobile_ceu_dev *pcdev = ici->priv;
571 struct v4l2_subdev *csi2_sd = find_csi2(pcdev);
573 BUG_ON(icd != pcdev->icd);
575 v4l2_subdev_call(csi2_sd, core, s_power, 0);
576 /* disable capture, disable interrupts */
577 ceu_write(pcdev, CEIER, 0);
578 sh_mobile_ceu_soft_reset(pcdev);
580 /* make sure active buffer is canceled */
581 spin_lock_irq(&pcdev->lock);
583 list_del_init(&to_ceu_vb(pcdev->active)->queue);
584 vb2_buffer_done(pcdev->active, VB2_BUF_STATE_ERROR);
585 pcdev->active = NULL;
587 spin_unlock_irq(&pcdev->lock);
589 pm_runtime_put_sync(ici->v4l2_dev.dev);
591 dev_info(icd->parent,
592 "SuperH Mobile CEU driver detached from camera %d\n",
599 * See chapter 29.4.12 "Capture Filter Control Register (CFLCR)"
600 * in SH7722 Hardware Manual
602 static unsigned int size_dst(unsigned int src, unsigned int scale)
604 unsigned int mant_pre = scale >> 12;
607 return ((mant_pre + 2 * (src - 1)) / (2 * mant_pre) - 1) *
608 mant_pre * 4096 / scale + 1;
611 static u16 calc_scale(unsigned int src, unsigned int *dst)
618 scale = (src * 4096 / *dst) & ~7;
620 while (scale > 4096 && size_dst(src, scale) < *dst)
623 *dst = size_dst(src, scale);
628 /* rect is guaranteed to not exceed the scaled camera rectangle */
629 static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd)
631 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
632 struct sh_mobile_ceu_cam *cam = icd->host_priv;
633 struct sh_mobile_ceu_dev *pcdev = ici->priv;
634 unsigned int height, width, cdwdr_width, in_width, in_height;
635 unsigned int left_offset, top_offset;
638 dev_geo(icd->parent, "Crop %ux%u@%u:%u\n",
639 icd->user_width, icd->user_height, cam->ceu_left, cam->ceu_top);
641 left_offset = cam->ceu_left;
642 top_offset = cam->ceu_top;
644 WARN_ON(icd->user_width & 3 || icd->user_height & 3);
646 width = icd->user_width;
648 if (pcdev->image_mode) {
649 in_width = cam->width;
650 if (!pcdev->is_16bit) {
656 int bytes_per_line = soc_mbus_bytes_per_line(width,
657 icd->current_fmt->host_fmt);
658 unsigned int w_factor;
660 switch (icd->current_fmt->host_fmt->packing) {
661 case SOC_MBUS_PACKING_2X8_PADHI:
668 in_width = cam->width * w_factor;
669 left_offset *= w_factor;
671 if (bytes_per_line < 0)
674 cdwdr_width = bytes_per_line;
677 height = icd->user_height;
678 in_height = cam->height;
679 if (V4L2_FIELD_NONE != pcdev->field) {
680 height = (height / 2) & ~3;
686 /* CSI2 special configuration */
687 if (pcdev->pdata->csi2) {
688 in_width = ((in_width - 2) * 2);
692 /* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */
693 camor = left_offset | (top_offset << 16);
696 "CAMOR 0x%x, CAPWR 0x%x, CFSZR 0x%x, CDWDR 0x%x\n", camor,
697 (in_height << 16) | in_width, (height << 16) | width,
700 ceu_write(pcdev, CAMOR, camor);
701 ceu_write(pcdev, CAPWR, (in_height << 16) | in_width);
702 /* CFSZR clipping is applied _after_ the scaling filter (CFLCR) */
703 ceu_write(pcdev, CFSZR, (height << 16) | width);
704 ceu_write(pcdev, CDWDR, cdwdr_width);
707 static u32 capture_save_reset(struct sh_mobile_ceu_dev *pcdev)
709 u32 capsr = ceu_read(pcdev, CAPSR);
710 ceu_write(pcdev, CAPSR, 1 << 16); /* reset, stop capture */
714 static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr)
716 unsigned long timeout = jiffies + 10 * HZ;
719 * Wait until the end of the current frame. It can take a long time,
720 * but if it has been aborted by a CAPSR reset, it shoule exit sooner.
722 while ((ceu_read(pcdev, CSTSR) & 1) && time_before(jiffies, timeout))
725 if (time_after(jiffies, timeout)) {
726 dev_err(pcdev->ici.v4l2_dev.dev,
727 "Timeout waiting for frame end! Interface problem?\n");
731 /* Wait until reset clears, this shall not hang... */
732 while (ceu_read(pcdev, CAPSR) & (1 << 16))
735 /* Anything to restore? */
736 if (capsr & ~(1 << 16))
737 ceu_write(pcdev, CAPSR, capsr);
740 /* Capture is not running, no interrupts, no locking needed */
741 static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
744 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
745 struct sh_mobile_ceu_dev *pcdev = ici->priv;
747 unsigned long camera_flags, common_flags, value;
749 struct sh_mobile_ceu_cam *cam = icd->host_priv;
750 u32 capsr = capture_save_reset(pcdev);
752 camera_flags = icd->ops->query_bus_param(icd);
753 common_flags = soc_camera_bus_param_compatible(camera_flags,
754 make_bus_param(pcdev));
758 /* Make choises, based on platform preferences */
759 if ((common_flags & SOCAM_HSYNC_ACTIVE_HIGH) &&
760 (common_flags & SOCAM_HSYNC_ACTIVE_LOW)) {
761 if (pcdev->pdata->flags & SH_CEU_FLAG_HSYNC_LOW)
762 common_flags &= ~SOCAM_HSYNC_ACTIVE_HIGH;
764 common_flags &= ~SOCAM_HSYNC_ACTIVE_LOW;
767 if ((common_flags & SOCAM_VSYNC_ACTIVE_HIGH) &&
768 (common_flags & SOCAM_VSYNC_ACTIVE_LOW)) {
769 if (pcdev->pdata->flags & SH_CEU_FLAG_VSYNC_LOW)
770 common_flags &= ~SOCAM_VSYNC_ACTIVE_HIGH;
772 common_flags &= ~SOCAM_VSYNC_ACTIVE_LOW;
775 ret = icd->ops->set_bus_param(icd, common_flags);
779 switch (common_flags & SOCAM_DATAWIDTH_MASK) {
780 case SOCAM_DATAWIDTH_8:
783 case SOCAM_DATAWIDTH_16:
790 ceu_write(pcdev, CRCNTR, 0);
791 ceu_write(pcdev, CRCMPR, 0);
793 value = 0x00000010; /* data fetch by default */
796 switch (icd->current_fmt->host_fmt->fourcc) {
797 case V4L2_PIX_FMT_NV12:
798 case V4L2_PIX_FMT_NV21:
799 yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */
801 case V4L2_PIX_FMT_NV16:
802 case V4L2_PIX_FMT_NV61:
804 case V4L2_MBUS_FMT_UYVY8_2X8:
805 value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
807 case V4L2_MBUS_FMT_VYUY8_2X8:
808 value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
810 case V4L2_MBUS_FMT_YUYV8_2X8:
811 value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
813 case V4L2_MBUS_FMT_YVYU8_2X8:
814 value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
821 if (icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
822 icd->current_fmt->host_fmt->fourcc == V4L2_PIX_FMT_NV61)
823 value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
825 value |= common_flags & SOCAM_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
826 value |= common_flags & SOCAM_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
827 value |= pcdev->is_16bit ? 1 << 12 : 0;
830 if (pcdev->pdata->csi2)
833 ceu_write(pcdev, CAMCR, value);
835 ceu_write(pcdev, CAPCR, 0x00300000);
837 switch (pcdev->field) {
838 case V4L2_FIELD_INTERLACED_TB:
841 case V4L2_FIELD_INTERLACED_BT:
848 ceu_write(pcdev, CAIFR, value);
850 sh_mobile_ceu_set_rect(icd);
853 dev_geo(icd->parent, "CFLCR 0x%x\n", pcdev->cflcr);
854 ceu_write(pcdev, CFLCR, pcdev->cflcr);
857 * A few words about byte order (observed in Big Endian mode)
859 * In data fetch mode bytes are received in chunks of 8 bytes.
860 * D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
862 * The data is however by default written to memory in reverse order:
863 * D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
865 * The lowest three bits of CDOCR allows us to do swapping,
866 * using 7 we swap the data bytes to match the incoming order:
867 * D0, D1, D2, D3, D4, D5, D6, D7
871 value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
873 ceu_write(pcdev, CDOCR, value);
874 ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
876 dev_dbg(icd->parent, "S_FMT successful for %c%c%c%c %ux%u\n",
877 pixfmt & 0xff, (pixfmt >> 8) & 0xff,
878 (pixfmt >> 16) & 0xff, (pixfmt >> 24) & 0xff,
879 icd->user_width, icd->user_height);
881 capture_restore(pcdev, capsr);
883 /* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
887 static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd,
888 unsigned char buswidth)
890 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
891 struct sh_mobile_ceu_dev *pcdev = ici->priv;
892 unsigned long camera_flags, common_flags;
894 camera_flags = icd->ops->query_bus_param(icd);
895 common_flags = soc_camera_bus_param_compatible(camera_flags,
896 make_bus_param(pcdev));
897 if (!common_flags || buswidth > 16 ||
898 (buswidth > 8 && !(common_flags & SOCAM_DATAWIDTH_16)))
904 static const struct soc_mbus_pixelfmt sh_mobile_ceu_formats[] = {
906 .fourcc = V4L2_PIX_FMT_NV12,
908 .bits_per_sample = 12,
909 .packing = SOC_MBUS_PACKING_NONE,
910 .order = SOC_MBUS_ORDER_LE,
912 .fourcc = V4L2_PIX_FMT_NV21,
914 .bits_per_sample = 12,
915 .packing = SOC_MBUS_PACKING_NONE,
916 .order = SOC_MBUS_ORDER_LE,
918 .fourcc = V4L2_PIX_FMT_NV16,
920 .bits_per_sample = 16,
921 .packing = SOC_MBUS_PACKING_NONE,
922 .order = SOC_MBUS_ORDER_LE,
924 .fourcc = V4L2_PIX_FMT_NV61,
926 .bits_per_sample = 16,
927 .packing = SOC_MBUS_PACKING_NONE,
928 .order = SOC_MBUS_ORDER_LE,
932 /* This will be corrected as we get more formats */
933 static bool sh_mobile_ceu_packing_supported(const struct soc_mbus_pixelfmt *fmt)
935 return fmt->packing == SOC_MBUS_PACKING_NONE ||
936 (fmt->bits_per_sample == 8 &&
937 fmt->packing == SOC_MBUS_PACKING_2X8_PADHI) ||
938 (fmt->bits_per_sample > 8 &&
939 fmt->packing == SOC_MBUS_PACKING_EXTEND16);
942 static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect);
944 static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, unsigned int idx,
945 struct soc_camera_format_xlate *xlate)
947 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
948 struct device *dev = icd->parent;
949 struct soc_camera_host *ici = to_soc_camera_host(dev);
950 struct sh_mobile_ceu_dev *pcdev = ici->priv;
953 struct sh_mobile_ceu_cam *cam;
954 enum v4l2_mbus_pixelcode code;
955 const struct soc_mbus_pixelfmt *fmt;
957 ret = v4l2_subdev_call(sd, video, enum_mbus_fmt, idx, &code);
959 /* No more formats */
962 fmt = soc_mbus_get_fmtdesc(code);
964 dev_warn(dev, "unsupported format code #%u: %d\n", idx, code);
968 if (!pcdev->pdata->csi2) {
969 ret = sh_mobile_ceu_try_bus_param(icd, fmt->bits_per_sample);
974 if (!icd->host_priv) {
975 struct v4l2_mbus_framefmt mf;
976 struct v4l2_rect rect;
979 /* FIXME: subwindow is lost between close / open */
981 /* Cache current client geometry */
982 ret = client_g_rect(sd, &rect);
987 ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
991 while ((mf.width > 2560 || mf.height > 1920) && shift < 4) {
992 /* Try 2560x1920, 1280x960, 640x480, 320x240 */
993 mf.width = 2560 >> shift;
994 mf.height = 1920 >> shift;
995 ret = v4l2_device_call_until_err(sd->v4l2_dev, (long)icd, video,
1003 dev_err(dev, "Failed to configure the client below %ux%x\n",
1004 mf.width, mf.height);
1008 dev_geo(dev, "camera fmt %ux%u\n", mf.width, mf.height);
1010 cam = kzalloc(sizeof(*cam), GFP_KERNEL);
1014 /* We are called with current camera crop, initialise subrect with it */
1016 cam->subrect = rect;
1018 cam->width = mf.width;
1019 cam->height = mf.height;
1021 icd->host_priv = cam;
1023 cam = icd->host_priv;
1026 /* Beginning of a pass */
1028 cam->extra_fmt = NULL;
1031 case V4L2_MBUS_FMT_UYVY8_2X8:
1032 case V4L2_MBUS_FMT_VYUY8_2X8:
1033 case V4L2_MBUS_FMT_YUYV8_2X8:
1034 case V4L2_MBUS_FMT_YVYU8_2X8:
1039 * Our case is simple so far: for any of the above four camera
1040 * formats we add all our four synthesized NV* formats, so,
1041 * just marking the device with a single flag suffices. If
1042 * the format generation rules are more complex, you would have
1043 * to actually hang your already added / counted formats onto
1044 * the host_priv pointer and check whether the format you're
1045 * going to add now is already there.
1047 cam->extra_fmt = sh_mobile_ceu_formats;
1049 n = ARRAY_SIZE(sh_mobile_ceu_formats);
1051 for (k = 0; xlate && k < n; k++) {
1052 xlate->host_fmt = &sh_mobile_ceu_formats[k];
1055 dev_dbg(dev, "Providing format %s using code %d\n",
1056 sh_mobile_ceu_formats[k].name, code);
1060 if (!sh_mobile_ceu_packing_supported(fmt))
1064 /* Generic pass-through */
1067 xlate->host_fmt = fmt;
1070 dev_dbg(dev, "Providing format %s in pass-through mode\n",
1077 static void sh_mobile_ceu_put_formats(struct soc_camera_device *icd)
1079 kfree(icd->host_priv);
1080 icd->host_priv = NULL;
1083 /* Check if any dimension of r1 is smaller than respective one of r2 */
1084 static bool is_smaller(struct v4l2_rect *r1, struct v4l2_rect *r2)
1086 return r1->width < r2->width || r1->height < r2->height;
1089 /* Check if r1 fails to cover r2 */
1090 static bool is_inside(struct v4l2_rect *r1, struct v4l2_rect *r2)
1092 return r1->left > r2->left || r1->top > r2->top ||
1093 r1->left + r1->width < r2->left + r2->width ||
1094 r1->top + r1->height < r2->top + r2->height;
1097 static unsigned int scale_down(unsigned int size, unsigned int scale)
1099 return (size * 4096 + scale / 2) / scale;
1102 static unsigned int calc_generic_scale(unsigned int input, unsigned int output)
1104 return (input * 4096 + output / 2) / output;
1107 /* Get and store current client crop */
1108 static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect)
1110 struct v4l2_crop crop;
1111 struct v4l2_cropcap cap;
1114 crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1116 ret = v4l2_subdev_call(sd, video, g_crop, &crop);
1122 /* Camera driver doesn't support .g_crop(), assume default rectangle */
1123 cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1125 ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1127 *rect = cap.defrect;
1132 /* Client crop has changed, update our sub-rectangle to remain within the area */
1133 static void update_subrect(struct sh_mobile_ceu_cam *cam)
1135 struct v4l2_rect *rect = &cam->rect, *subrect = &cam->subrect;
1137 if (rect->width < subrect->width)
1138 subrect->width = rect->width;
1140 if (rect->height < subrect->height)
1141 subrect->height = rect->height;
1143 if (rect->left > subrect->left)
1144 subrect->left = rect->left;
1145 else if (rect->left + rect->width >
1146 subrect->left + subrect->width)
1147 subrect->left = rect->left + rect->width -
1150 if (rect->top > subrect->top)
1151 subrect->top = rect->top;
1152 else if (rect->top + rect->height >
1153 subrect->top + subrect->height)
1154 subrect->top = rect->top + rect->height -
1159 * The common for both scaling and cropping iterative approach is:
1160 * 1. try if the client can produce exactly what requested by the user
1161 * 2. if (1) failed, try to double the client image until we get one big enough
1162 * 3. if (2) failed, try to request the maximum image
1164 static int client_s_crop(struct soc_camera_device *icd, struct v4l2_crop *crop,
1165 struct v4l2_crop *cam_crop)
1167 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1168 struct v4l2_rect *rect = &crop->c, *cam_rect = &cam_crop->c;
1169 struct device *dev = sd->v4l2_dev->dev;
1170 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1171 struct v4l2_cropcap cap;
1173 unsigned int width, height;
1175 v4l2_subdev_call(sd, video, s_crop, crop);
1176 ret = client_g_rect(sd, cam_rect);
1181 * Now cam_crop contains the current camera input rectangle, and it must
1182 * be within camera cropcap bounds
1184 if (!memcmp(rect, cam_rect, sizeof(*rect))) {
1185 /* Even if camera S_CROP failed, but camera rectangle matches */
1186 dev_dbg(dev, "Camera S_CROP successful for %dx%d@%d:%d\n",
1187 rect->width, rect->height, rect->left, rect->top);
1188 cam->rect = *cam_rect;
1192 /* Try to fix cropping, that camera hasn't managed to set */
1193 dev_geo(dev, "Fix camera S_CROP for %dx%d@%d:%d to %dx%d@%d:%d\n",
1194 cam_rect->width, cam_rect->height,
1195 cam_rect->left, cam_rect->top,
1196 rect->width, rect->height, rect->left, rect->top);
1198 /* We need sensor maximum rectangle */
1199 ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1203 /* Put user requested rectangle within sensor bounds */
1204 soc_camera_limit_side(&rect->left, &rect->width, cap.bounds.left, 2,
1206 soc_camera_limit_side(&rect->top, &rect->height, cap.bounds.top, 4,
1210 * Popular special case - some cameras can only handle fixed sizes like
1211 * QVGA, VGA,... Take care to avoid infinite loop.
1213 width = max(cam_rect->width, 2);
1214 height = max(cam_rect->height, 2);
1217 * Loop as long as sensor is not covering the requested rectangle and
1218 * is still within its bounds
1220 while (!ret && (is_smaller(cam_rect, rect) ||
1221 is_inside(cam_rect, rect)) &&
1222 (cap.bounds.width > width || cap.bounds.height > height)) {
1227 cam_rect->width = width;
1228 cam_rect->height = height;
1231 * We do not know what capabilities the camera has to set up
1232 * left and top borders. We could try to be smarter in iterating
1233 * them, e.g., if camera current left is to the right of the
1234 * target left, set it to the middle point between the current
1235 * left and minimum left. But that would add too much
1236 * complexity: we would have to iterate each border separately.
1237 * Instead we just drop to the left and top bounds.
1239 if (cam_rect->left > rect->left)
1240 cam_rect->left = cap.bounds.left;
1242 if (cam_rect->left + cam_rect->width < rect->left + rect->width)
1243 cam_rect->width = rect->left + rect->width -
1246 if (cam_rect->top > rect->top)
1247 cam_rect->top = cap.bounds.top;
1249 if (cam_rect->top + cam_rect->height < rect->top + rect->height)
1250 cam_rect->height = rect->top + rect->height -
1253 v4l2_subdev_call(sd, video, s_crop, cam_crop);
1254 ret = client_g_rect(sd, cam_rect);
1255 dev_geo(dev, "Camera S_CROP %d for %dx%d@%d:%d\n", ret,
1256 cam_rect->width, cam_rect->height,
1257 cam_rect->left, cam_rect->top);
1260 /* S_CROP must not modify the rectangle */
1261 if (is_smaller(cam_rect, rect) || is_inside(cam_rect, rect)) {
1263 * The camera failed to configure a suitable cropping,
1264 * we cannot use the current rectangle, set to max
1266 *cam_rect = cap.bounds;
1267 v4l2_subdev_call(sd, video, s_crop, cam_crop);
1268 ret = client_g_rect(sd, cam_rect);
1269 dev_geo(dev, "Camera S_CROP %d for max %dx%d@%d:%d\n", ret,
1270 cam_rect->width, cam_rect->height,
1271 cam_rect->left, cam_rect->top);
1275 cam->rect = *cam_rect;
1276 update_subrect(cam);
1282 /* Iterative s_mbus_fmt, also updates cached client crop on success */
1283 static int client_s_fmt(struct soc_camera_device *icd,
1284 struct v4l2_mbus_framefmt *mf, bool ceu_can_scale)
1286 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1287 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1288 struct device *dev = icd->parent;
1289 unsigned int width = mf->width, height = mf->height, tmp_w, tmp_h;
1290 unsigned int max_width, max_height;
1291 struct v4l2_cropcap cap;
1295 ret = v4l2_device_call_until_err(sd->v4l2_dev, (long)icd, video,
1300 dev_geo(dev, "camera scaled to %ux%u\n", mf->width, mf->height);
1302 if (width == mf->width && height == mf->height) {
1303 /* Perfect! The client has done it all. */
1312 cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1314 ret = v4l2_subdev_call(sd, video, cropcap, &cap);
1318 max_width = min(cap.bounds.width, 2560);
1319 max_height = min(cap.bounds.height, 1920);
1321 /* Camera set a format, but geometry is not precise, try to improve */
1325 /* width <= max_width && height <= max_height - guaranteed by try_fmt */
1326 while ((width > tmp_w || height > tmp_h) &&
1327 tmp_w < max_width && tmp_h < max_height) {
1328 tmp_w = min(2 * tmp_w, max_width);
1329 tmp_h = min(2 * tmp_h, max_height);
1332 ret = v4l2_device_call_until_err(sd->v4l2_dev, (long)icd, video,
1334 dev_geo(dev, "Camera scaled to %ux%u\n",
1335 mf->width, mf->height);
1337 /* This shouldn't happen */
1338 dev_err(dev, "Client failed to set format: %d\n", ret);
1345 ret = client_g_rect(sd, &cam->rect);
1350 cam->subrect = cam->rect;
1352 update_subrect(cam);
1358 * @width - on output: user width, mapped back to input
1359 * @height - on output: user height, mapped back to input
1360 * @mf - in- / output camera output window
1362 static int client_scale(struct soc_camera_device *icd,
1363 struct v4l2_mbus_framefmt *mf,
1364 unsigned int *width, unsigned int *height,
1367 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1368 struct device *dev = icd->parent;
1369 struct v4l2_mbus_framefmt mf_tmp = *mf;
1370 unsigned int scale_h, scale_v;
1374 * 5. Apply iterative camera S_FMT for camera user window (also updates
1375 * client crop cache and the imaginary sub-rectangle).
1377 ret = client_s_fmt(icd, &mf_tmp, ceu_can_scale);
1381 dev_geo(dev, "5: camera scaled to %ux%u\n",
1382 mf_tmp.width, mf_tmp.height);
1384 /* 6. Retrieve camera output window (g_fmt) */
1386 /* unneeded - it is already in "mf_tmp" */
1388 /* 7. Calculate new client scales. */
1389 scale_h = calc_generic_scale(cam->rect.width, mf_tmp.width);
1390 scale_v = calc_generic_scale(cam->rect.height, mf_tmp.height);
1392 mf->width = mf_tmp.width;
1393 mf->height = mf_tmp.height;
1394 mf->colorspace = mf_tmp.colorspace;
1397 * 8. Calculate new CEU crop - apply camera scales to previously
1398 * updated "effective" crop.
1400 *width = scale_down(cam->subrect.width, scale_h);
1401 *height = scale_down(cam->subrect.height, scale_v);
1403 dev_geo(dev, "8: new client sub-window %ux%u\n", *width, *height);
1409 * CEU can scale and crop, but we don't want to waste bandwidth and kill the
1410 * framerate by always requesting the maximum image from the client. See
1411 * Documentation/video4linux/sh_mobile_ceu_camera.txt for a description of
1412 * scaling and cropping algorithms and for the meaning of referenced here steps.
1414 static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd,
1415 struct v4l2_crop *a)
1417 struct v4l2_rect *rect = &a->c;
1418 struct device *dev = icd->parent;
1419 struct soc_camera_host *ici = to_soc_camera_host(dev);
1420 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1421 struct v4l2_crop cam_crop;
1422 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1423 struct v4l2_rect *cam_rect = &cam_crop.c;
1424 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1425 struct v4l2_mbus_framefmt mf;
1426 unsigned int scale_cam_h, scale_cam_v, scale_ceu_h, scale_ceu_v,
1427 out_width, out_height;
1428 int interm_width, interm_height;
1432 dev_geo(dev, "S_CROP(%ux%u@%u:%u)\n", rect->width, rect->height,
1433 rect->left, rect->top);
1435 /* During camera cropping its output window can change too, stop CEU */
1436 capsr = capture_save_reset(pcdev);
1437 dev_dbg(dev, "CAPSR 0x%x, CFLCR 0x%x\n", capsr, pcdev->cflcr);
1440 * 1. - 2. Apply iterative camera S_CROP for new input window, read back
1441 * actual camera rectangle.
1443 ret = client_s_crop(icd, a, &cam_crop);
1447 dev_geo(dev, "1-2: camera cropped to %ux%u@%u:%u\n",
1448 cam_rect->width, cam_rect->height,
1449 cam_rect->left, cam_rect->top);
1451 /* On success cam_crop contains current camera crop */
1453 /* 3. Retrieve camera output window */
1454 ret = v4l2_subdev_call(sd, video, g_mbus_fmt, &mf);
1458 if (mf.width > 2560 || mf.height > 1920)
1461 /* 4. Calculate camera scales */
1462 scale_cam_h = calc_generic_scale(cam_rect->width, mf.width);
1463 scale_cam_v = calc_generic_scale(cam_rect->height, mf.height);
1465 /* Calculate intermediate window */
1466 interm_width = scale_down(rect->width, scale_cam_h);
1467 interm_height = scale_down(rect->height, scale_cam_v);
1469 if (interm_width < icd->user_width) {
1472 new_scale_h = calc_generic_scale(rect->width, icd->user_width);
1474 mf.width = scale_down(cam_rect->width, new_scale_h);
1477 if (interm_height < icd->user_height) {
1480 new_scale_v = calc_generic_scale(rect->height, icd->user_height);
1482 mf.height = scale_down(cam_rect->height, new_scale_v);
1485 if (interm_width < icd->user_width || interm_height < icd->user_height) {
1486 ret = v4l2_device_call_until_err(sd->v4l2_dev, (int)icd, video,
1491 dev_geo(dev, "New camera output %ux%u\n", mf.width, mf.height);
1492 scale_cam_h = calc_generic_scale(cam_rect->width, mf.width);
1493 scale_cam_v = calc_generic_scale(cam_rect->height, mf.height);
1494 interm_width = scale_down(rect->width, scale_cam_h);
1495 interm_height = scale_down(rect->height, scale_cam_v);
1498 /* Cache camera output window */
1499 cam->width = mf.width;
1500 cam->height = mf.height;
1502 if (pcdev->image_mode) {
1503 out_width = min(interm_width, icd->user_width);
1504 out_height = min(interm_height, icd->user_height);
1506 out_width = interm_width;
1507 out_height = interm_height;
1511 * 5. Calculate CEU scales from camera scales from results of (5) and
1514 scale_ceu_h = calc_scale(interm_width, &out_width);
1515 scale_ceu_v = calc_scale(interm_height, &out_height);
1517 dev_geo(dev, "5: CEU scales %u:%u\n", scale_ceu_h, scale_ceu_v);
1519 /* Apply CEU scales. */
1520 cflcr = scale_ceu_h | (scale_ceu_v << 16);
1521 if (cflcr != pcdev->cflcr) {
1522 pcdev->cflcr = cflcr;
1523 ceu_write(pcdev, CFLCR, cflcr);
1526 icd->user_width = out_width & ~3;
1527 icd->user_height = out_height & ~3;
1528 /* Offsets are applied at the CEU scaling filter input */
1529 cam->ceu_left = scale_down(rect->left - cam_rect->left, scale_cam_h) & ~1;
1530 cam->ceu_top = scale_down(rect->top - cam_rect->top, scale_cam_v) & ~1;
1532 /* 6. Use CEU cropping to crop to the new window. */
1533 sh_mobile_ceu_set_rect(icd);
1535 cam->subrect = *rect;
1537 dev_geo(dev, "6: CEU cropped to %ux%u@%u:%u\n",
1538 icd->user_width, icd->user_height,
1539 cam->ceu_left, cam->ceu_top);
1541 /* Restore capture. The CE bit can be cleared by the hardware */
1544 capture_restore(pcdev, capsr);
1546 /* Even if only camera cropping succeeded */
1550 static int sh_mobile_ceu_get_crop(struct soc_camera_device *icd,
1551 struct v4l2_crop *a)
1553 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1555 a->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1556 a->c = cam->subrect;
1562 * Calculate real client output window by applying new scales to the current
1563 * client crop. New scales are calculated from the requested output format and
1564 * CEU crop, mapped backed onto the client input (subrect).
1566 static void calculate_client_output(struct soc_camera_device *icd,
1567 const struct v4l2_pix_format *pix, struct v4l2_mbus_framefmt *mf)
1569 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1570 struct device *dev = icd->parent;
1571 struct v4l2_rect *cam_subrect = &cam->subrect;
1572 unsigned int scale_v, scale_h;
1574 if (cam_subrect->width == cam->rect.width &&
1575 cam_subrect->height == cam->rect.height) {
1576 /* No sub-cropping */
1577 mf->width = pix->width;
1578 mf->height = pix->height;
1582 /* 1.-2. Current camera scales and subwin - cached. */
1584 dev_geo(dev, "2: subwin %ux%u@%u:%u\n",
1585 cam_subrect->width, cam_subrect->height,
1586 cam_subrect->left, cam_subrect->top);
1589 * 3. Calculate new combined scales from input sub-window to requested
1594 * TODO: CEU cannot scale images larger than VGA to smaller than SubQCIF
1595 * (128x96) or larger than VGA
1597 scale_h = calc_generic_scale(cam_subrect->width, pix->width);
1598 scale_v = calc_generic_scale(cam_subrect->height, pix->height);
1600 dev_geo(dev, "3: scales %u:%u\n", scale_h, scale_v);
1603 * 4. Calculate desired client output window by applying combined scales
1604 * to client (real) input window.
1606 mf->width = scale_down(cam->rect.width, scale_h);
1607 mf->height = scale_down(cam->rect.height, scale_v);
1610 /* Similar to set_crop multistage iterative algorithm */
1611 static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
1612 struct v4l2_format *f)
1614 struct device *dev = icd->parent;
1615 struct soc_camera_host *ici = to_soc_camera_host(dev);
1616 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1617 struct sh_mobile_ceu_cam *cam = icd->host_priv;
1618 struct v4l2_pix_format *pix = &f->fmt.pix;
1619 struct v4l2_mbus_framefmt mf;
1620 __u32 pixfmt = pix->pixelformat;
1621 const struct soc_camera_format_xlate *xlate;
1622 /* Keep Compiler Happy */
1623 unsigned int ceu_sub_width = 0, ceu_sub_height = 0;
1624 u16 scale_v, scale_h;
1627 enum v4l2_field field;
1629 dev_geo(dev, "S_FMT(pix=0x%x, %ux%u)\n", pixfmt, pix->width, pix->height);
1631 switch (pix->field) {
1633 pix->field = V4L2_FIELD_NONE;
1635 case V4L2_FIELD_INTERLACED_TB:
1636 case V4L2_FIELD_INTERLACED_BT:
1637 case V4L2_FIELD_NONE:
1640 case V4L2_FIELD_INTERLACED:
1641 field = V4L2_FIELD_INTERLACED_TB;
1645 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1647 dev_warn(dev, "Format %x not found\n", pixfmt);
1651 /* 1.-4. Calculate desired client output geometry */
1652 calculate_client_output(icd, pix, &mf);
1653 mf.field = pix->field;
1654 mf.colorspace = pix->colorspace;
1655 mf.code = xlate->code;
1658 case V4L2_PIX_FMT_NV12:
1659 case V4L2_PIX_FMT_NV21:
1660 case V4L2_PIX_FMT_NV16:
1661 case V4L2_PIX_FMT_NV61:
1668 dev_geo(dev, "4: request camera output %ux%u\n", mf.width, mf.height);
1671 ret = client_scale(icd, &mf, &ceu_sub_width, &ceu_sub_height,
1672 image_mode && V4L2_FIELD_NONE == field);
1674 dev_geo(dev, "5-9: client scale return %d\n", ret);
1676 /* Done with the camera. Now see if we can improve the result */
1678 dev_geo(dev, "fmt %ux%u, requested %ux%u\n",
1679 mf.width, mf.height, pix->width, pix->height);
1683 if (mf.code != xlate->code)
1686 /* 9. Prepare CEU crop */
1687 cam->width = mf.width;
1688 cam->height = mf.height;
1690 /* 10. Use CEU scaling to scale to the requested user window. */
1692 /* We cannot scale up */
1693 if (pix->width > ceu_sub_width)
1694 ceu_sub_width = pix->width;
1696 if (pix->height > ceu_sub_height)
1697 ceu_sub_height = pix->height;
1699 pix->colorspace = mf.colorspace;
1702 /* Scale pix->{width x height} down to width x height */
1703 scale_h = calc_scale(ceu_sub_width, &pix->width);
1704 scale_v = calc_scale(ceu_sub_height, &pix->height);
1706 pix->width = ceu_sub_width;
1707 pix->height = ceu_sub_height;
1712 pcdev->cflcr = scale_h | (scale_v << 16);
1715 * We have calculated CFLCR, the actual configuration will be performed
1716 * in sh_mobile_ceu_set_bus_param()
1719 dev_geo(dev, "10: W: %u : 0x%x = %u, H: %u : 0x%x = %u\n",
1720 ceu_sub_width, scale_h, pix->width,
1721 ceu_sub_height, scale_v, pix->height);
1723 cam->code = xlate->code;
1724 icd->current_fmt = xlate;
1726 pcdev->field = field;
1727 pcdev->image_mode = image_mode;
1729 /* CFSZR requirement */
1736 static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
1737 struct v4l2_format *f)
1739 const struct soc_camera_format_xlate *xlate;
1740 struct v4l2_pix_format *pix = &f->fmt.pix;
1741 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1742 struct v4l2_mbus_framefmt mf;
1743 __u32 pixfmt = pix->pixelformat;
1747 dev_geo(icd->parent, "TRY_FMT(pix=0x%x, %ux%u)\n",
1748 pixfmt, pix->width, pix->height);
1750 xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
1752 dev_warn(icd->parent, "Format %x not found\n", pixfmt);
1756 /* FIXME: calculate using depth and bus width */
1758 /* CFSZR requires height and width to be 4-pixel aligned */
1759 v4l_bound_align_image(&pix->width, 2, 2560, 2,
1760 &pix->height, 4, 1920, 2, 0);
1763 height = pix->height;
1765 /* limit to sensor capabilities */
1766 mf.width = pix->width;
1767 mf.height = pix->height;
1768 mf.field = pix->field;
1769 mf.code = xlate->code;
1770 mf.colorspace = pix->colorspace;
1772 ret = v4l2_device_call_until_err(sd->v4l2_dev, (long)icd, video, try_mbus_fmt, &mf);
1776 pix->width = mf.width;
1777 pix->height = mf.height;
1778 pix->field = mf.field;
1779 pix->colorspace = mf.colorspace;
1782 case V4L2_PIX_FMT_NV12:
1783 case V4L2_PIX_FMT_NV21:
1784 case V4L2_PIX_FMT_NV16:
1785 case V4L2_PIX_FMT_NV61:
1786 /* FIXME: check against rect_max after converting soc-camera */
1787 /* We can scale precisely, need a bigger image from camera */
1788 if (pix->width < width || pix->height < height) {
1790 * We presume, the sensor behaves sanely, i.e., if
1791 * requested a bigger rectangle, it will not return a
1796 ret = v4l2_device_call_until_err(sd->v4l2_dev, (long)icd, video,
1799 /* Shouldn't actually happen... */
1800 dev_err(icd->parent,
1801 "FIXME: client try_fmt() = %d\n", ret);
1805 /* We will scale exactly */
1806 if (mf.width > width)
1808 if (mf.height > height)
1809 pix->height = height;
1815 dev_geo(icd->parent, "%s(): return %d, fmt 0x%x, %ux%u\n",
1816 __func__, ret, pix->pixelformat, pix->width, pix->height);
1821 static int sh_mobile_ceu_set_livecrop(struct soc_camera_device *icd,
1822 struct v4l2_crop *a)
1824 struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
1825 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1826 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1827 u32 out_width = icd->user_width, out_height = icd->user_height;
1832 /* Wait for frame */
1833 ret = wait_for_completion_interruptible(&pcdev->complete);
1834 /* Stop the client */
1835 ret = v4l2_subdev_call(sd, video, s_stream, 0);
1837 dev_warn(icd->parent,
1838 "Client failed to stop the stream: %d\n", ret);
1840 /* Do the crop, if it fails, there's nothing more we can do */
1841 sh_mobile_ceu_set_crop(icd, a);
1843 dev_geo(icd->parent, "Output after crop: %ux%u\n", icd->user_width, icd->user_height);
1845 if (icd->user_width != out_width || icd->user_height != out_height) {
1846 struct v4l2_format f = {
1847 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE,
1850 .height = out_height,
1851 .pixelformat = icd->current_fmt->host_fmt->fourcc,
1852 .field = pcdev->field,
1853 .colorspace = icd->colorspace,
1856 ret = sh_mobile_ceu_set_fmt(icd, &f);
1857 if (!ret && (out_width != f.fmt.pix.width ||
1858 out_height != f.fmt.pix.height))
1861 icd->user_width = out_width & ~3;
1862 icd->user_height = out_height & ~3;
1863 ret = sh_mobile_ceu_set_bus_param(icd,
1864 icd->current_fmt->host_fmt->fourcc);
1868 /* Thaw the queue */
1870 spin_lock_irq(&pcdev->lock);
1871 sh_mobile_ceu_capture(pcdev);
1872 spin_unlock_irq(&pcdev->lock);
1873 /* Start the client */
1874 ret = v4l2_subdev_call(sd, video, s_stream, 1);
1878 static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
1880 struct soc_camera_device *icd = file->private_data;
1882 return vb2_poll(&icd->vb2_vidq, file, pt);
1885 static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
1886 struct v4l2_capability *cap)
1888 strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
1889 cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
1893 static int sh_mobile_ceu_init_videobuf(struct vb2_queue *q,
1894 struct soc_camera_device *icd)
1896 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
1897 q->io_modes = VB2_MMAP | VB2_USERPTR;
1899 q->ops = &sh_mobile_ceu_videobuf_ops;
1900 q->mem_ops = &vb2_dma_contig_memops;
1901 q->buf_struct_size = sizeof(struct sh_mobile_ceu_buffer);
1903 return vb2_queue_init(q);
1906 static int sh_mobile_ceu_get_ctrl(struct soc_camera_device *icd,
1907 struct v4l2_control *ctrl)
1909 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1910 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1914 case V4L2_CID_SHARPNESS:
1915 val = ceu_read(pcdev, CLFCR);
1916 ctrl->value = val ^ 1;
1919 return -ENOIOCTLCMD;
1922 static int sh_mobile_ceu_set_ctrl(struct soc_camera_device *icd,
1923 struct v4l2_control *ctrl)
1925 struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
1926 struct sh_mobile_ceu_dev *pcdev = ici->priv;
1929 case V4L2_CID_SHARPNESS:
1930 switch (icd->current_fmt->host_fmt->fourcc) {
1931 case V4L2_PIX_FMT_NV12:
1932 case V4L2_PIX_FMT_NV21:
1933 case V4L2_PIX_FMT_NV16:
1934 case V4L2_PIX_FMT_NV61:
1935 ceu_write(pcdev, CLFCR, !ctrl->value);
1940 return -ENOIOCTLCMD;
1943 static const struct v4l2_queryctrl sh_mobile_ceu_controls[] = {
1945 .id = V4L2_CID_SHARPNESS,
1946 .type = V4L2_CTRL_TYPE_BOOLEAN,
1947 .name = "Low-pass filter",
1955 static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
1956 .owner = THIS_MODULE,
1957 .add = sh_mobile_ceu_add_device,
1958 .remove = sh_mobile_ceu_remove_device,
1959 .get_formats = sh_mobile_ceu_get_formats,
1960 .put_formats = sh_mobile_ceu_put_formats,
1961 .get_crop = sh_mobile_ceu_get_crop,
1962 .set_crop = sh_mobile_ceu_set_crop,
1963 .set_livecrop = sh_mobile_ceu_set_livecrop,
1964 .set_fmt = sh_mobile_ceu_set_fmt,
1965 .try_fmt = sh_mobile_ceu_try_fmt,
1966 .set_ctrl = sh_mobile_ceu_set_ctrl,
1967 .get_ctrl = sh_mobile_ceu_get_ctrl,
1968 .poll = sh_mobile_ceu_poll,
1969 .querycap = sh_mobile_ceu_querycap,
1970 .set_bus_param = sh_mobile_ceu_set_bus_param,
1971 .init_videobuf2 = sh_mobile_ceu_init_videobuf,
1972 .controls = sh_mobile_ceu_controls,
1973 .num_controls = ARRAY_SIZE(sh_mobile_ceu_controls),
1977 struct notifier_block notifier;
1978 struct completion completion;
1982 static int bus_notify(struct notifier_block *nb,
1983 unsigned long action, void *data)
1985 struct device *dev = data;
1986 struct bus_wait *wait = container_of(nb, struct bus_wait, notifier);
1988 if (wait->dev != dev)
1992 case BUS_NOTIFY_UNBOUND_DRIVER:
1993 /* Protect from module unloading */
1994 wait_for_completion(&wait->completion);
2000 static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev)
2002 struct sh_mobile_ceu_dev *pcdev;
2003 struct resource *res;
2007 struct bus_wait wait = {
2008 .completion = COMPLETION_INITIALIZER_ONSTACK(wait.completion),
2009 .notifier.notifier_call = bus_notify,
2011 struct sh_mobile_ceu_companion *csi2;
2013 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2014 irq = platform_get_irq(pdev, 0);
2015 if (!res || (int)irq <= 0) {
2016 dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
2021 pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
2023 dev_err(&pdev->dev, "Could not allocate pcdev\n");
2028 INIT_LIST_HEAD(&pcdev->capture);
2029 spin_lock_init(&pcdev->lock);
2030 init_completion(&pcdev->complete);
2032 pcdev->pdata = pdev->dev.platform_data;
2033 if (!pcdev->pdata) {
2035 dev_err(&pdev->dev, "CEU platform data not set.\n");
2039 base = ioremap_nocache(res->start, resource_size(res));
2042 dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
2048 pcdev->video_limit = 0; /* only enabled if second resource exists */
2050 res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
2052 err = dma_declare_coherent_memory(&pdev->dev, res->start,
2056 DMA_MEMORY_EXCLUSIVE);
2058 dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
2063 pcdev->video_limit = resource_size(res);
2067 err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
2068 dev_name(&pdev->dev), pcdev);
2070 dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
2071 goto exit_release_mem;
2074 pm_suspend_ignore_children(&pdev->dev, true);
2075 pm_runtime_enable(&pdev->dev);
2076 pm_runtime_resume(&pdev->dev);
2078 pcdev->ici.priv = pcdev;
2079 pcdev->ici.v4l2_dev.dev = &pdev->dev;
2080 pcdev->ici.nr = pdev->id;
2081 pcdev->ici.drv_name = dev_name(&pdev->dev);
2082 pcdev->ici.ops = &sh_mobile_ceu_host_ops;
2084 pcdev->alloc_ctx = vb2_dma_contig_init_ctx(&pdev->dev);
2085 if (IS_ERR(pcdev->alloc_ctx)) {
2086 err = PTR_ERR(pcdev->alloc_ctx);
2090 err = soc_camera_host_register(&pcdev->ici);
2094 /* CSI2 interfacing */
2095 csi2 = pcdev->pdata->csi2;
2097 struct platform_device *csi2_pdev =
2098 platform_device_alloc("sh-mobile-csi2", csi2->id);
2099 struct sh_csi2_pdata *csi2_pdata = csi2->platform_data;
2103 goto exit_host_unregister;
2106 pcdev->csi2_pdev = csi2_pdev;
2108 err = platform_device_add_data(csi2_pdev, csi2_pdata, sizeof(*csi2_pdata));
2112 csi2_pdata = csi2_pdev->dev.platform_data;
2113 csi2_pdata->v4l2_dev = &pcdev->ici.v4l2_dev;
2115 csi2_pdev->resource = csi2->resource;
2116 csi2_pdev->num_resources = csi2->num_resources;
2118 err = platform_device_add(csi2_pdev);
2122 wait.dev = &csi2_pdev->dev;
2124 err = bus_register_notifier(&platform_bus_type, &wait.notifier);
2126 goto exit_pdev_unregister;
2129 * From this point the driver module will not unload, until
2130 * we complete the completion.
2133 if (!csi2_pdev->dev.driver) {
2134 complete(&wait.completion);
2135 /* Either too late, or probing failed */
2136 bus_unregister_notifier(&platform_bus_type, &wait.notifier);
2138 goto exit_pdev_unregister;
2142 * The module is still loaded, in the worst case it is hanging
2143 * in device release on our completion. So, _now_ dereferencing
2144 * the "owner" is safe!
2147 err = try_module_get(csi2_pdev->dev.driver->owner);
2149 /* Let notifier complete, if it has been locked */
2150 complete(&wait.completion);
2151 bus_unregister_notifier(&platform_bus_type, &wait.notifier);
2154 goto exit_pdev_unregister;
2160 exit_pdev_unregister:
2161 platform_device_del(pcdev->csi2_pdev);
2163 pcdev->csi2_pdev->resource = NULL;
2164 platform_device_put(pcdev->csi2_pdev);
2165 exit_host_unregister:
2166 soc_camera_host_unregister(&pcdev->ici);
2168 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
2170 pm_runtime_disable(&pdev->dev);
2171 free_irq(pcdev->irq, pcdev);
2173 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
2174 dma_release_declared_memory(&pdev->dev);
2183 static int __devexit sh_mobile_ceu_remove(struct platform_device *pdev)
2185 struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
2186 struct sh_mobile_ceu_dev *pcdev = container_of(soc_host,
2187 struct sh_mobile_ceu_dev, ici);
2188 struct platform_device *csi2_pdev = pcdev->csi2_pdev;
2190 soc_camera_host_unregister(soc_host);
2191 pm_runtime_disable(&pdev->dev);
2192 free_irq(pcdev->irq, pcdev);
2193 if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
2194 dma_release_declared_memory(&pdev->dev);
2195 iounmap(pcdev->base);
2196 vb2_dma_contig_cleanup_ctx(pcdev->alloc_ctx);
2197 if (csi2_pdev && csi2_pdev->dev.driver) {
2198 struct module *csi2_drv = csi2_pdev->dev.driver->owner;
2199 platform_device_del(csi2_pdev);
2200 csi2_pdev->resource = NULL;
2201 platform_device_put(csi2_pdev);
2202 module_put(csi2_drv);
2209 static int sh_mobile_ceu_runtime_nop(struct device *dev)
2211 /* Runtime PM callback shared between ->runtime_suspend()
2212 * and ->runtime_resume(). Simply returns success.
2214 * This driver re-initializes all registers after
2215 * pm_runtime_get_sync() anyway so there is no need
2216 * to save and restore registers here.
2221 static const struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = {
2222 .runtime_suspend = sh_mobile_ceu_runtime_nop,
2223 .runtime_resume = sh_mobile_ceu_runtime_nop,
2226 static struct platform_driver sh_mobile_ceu_driver = {
2228 .name = "sh_mobile_ceu",
2229 .pm = &sh_mobile_ceu_dev_pm_ops,
2231 .probe = sh_mobile_ceu_probe,
2232 .remove = __devexit_p(sh_mobile_ceu_remove),
2235 static int __init sh_mobile_ceu_init(void)
2237 /* Whatever return code */
2238 request_module("sh_mobile_csi2");
2239 return platform_driver_register(&sh_mobile_ceu_driver);
2242 static void __exit sh_mobile_ceu_exit(void)
2244 platform_driver_unregister(&sh_mobile_ceu_driver);
2247 module_init(sh_mobile_ceu_init);
2248 module_exit(sh_mobile_ceu_exit);
2250 MODULE_DESCRIPTION("SuperH Mobile CEU driver");
2251 MODULE_AUTHOR("Magnus Damm");
2252 MODULE_LICENSE("GPL");
2253 MODULE_VERSION("0.0.6");
2254 MODULE_ALIAS("platform:sh_mobile_ceu");