linux/drivers/media/video/sh_mobile_ceu_camera.c
Kuninori Morimoto 5cf93f1dca V4L/DVB (13128): sh_mobile_ceu_camera: add VBP error support
If CEU driver can not receive data from camera,
CETCR has VBP error state.
Then, CEU is stopped and cure operation is needed.
This patch add VBP error cure operation.

Signed-off-by: Kuninori Morimoto <morimoto.kuninori@renesas.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2009-12-05 18:40:28 -02:00

1859 lines
50 KiB
C

/*
* V4L2 Driver for SuperH Mobile CEU interface
*
* Copyright (C) 2008 Magnus Damm
*
* Based on V4L2 Driver for PXA camera host - "pxa_camera.c",
*
* Copyright (C) 2006, Sascha Hauer, Pengutronix
* Copyright (C) 2008, Guennadi Liakhovetski <kernel@pengutronix.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/io.h>
#include <linux/delay.h>
#include <linux/dma-mapping.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/moduleparam.h>
#include <linux/time.h>
#include <linux/version.h>
#include <linux/device.h>
#include <linux/platform_device.h>
#include <linux/videodev2.h>
#include <linux/pm_runtime.h>
#include <linux/sched.h>
#include <media/v4l2-common.h>
#include <media/v4l2-dev.h>
#include <media/soc_camera.h>
#include <media/sh_mobile_ceu.h>
#include <media/videobuf-dma-contig.h>
/* register offsets for sh7722 / sh7723 */
#define CAPSR 0x00 /* Capture start register */
#define CAPCR 0x04 /* Capture control register */
#define CAMCR 0x08 /* Capture interface control register */
#define CMCYR 0x0c /* Capture interface cycle register */
#define CAMOR 0x10 /* Capture interface offset register */
#define CAPWR 0x14 /* Capture interface width register */
#define CAIFR 0x18 /* Capture interface input format register */
#define CSTCR 0x20 /* Camera strobe control register (<= sh7722) */
#define CSECR 0x24 /* Camera strobe emission count register (<= sh7722) */
#define CRCNTR 0x28 /* CEU register control register */
#define CRCMPR 0x2c /* CEU register forcible control register */
#define CFLCR 0x30 /* Capture filter control register */
#define CFSZR 0x34 /* Capture filter size clip register */
#define CDWDR 0x38 /* Capture destination width register */
#define CDAYR 0x3c /* Capture data address Y register */
#define CDACR 0x40 /* Capture data address C register */
#define CDBYR 0x44 /* Capture data bottom-field address Y register */
#define CDBCR 0x48 /* Capture data bottom-field address C register */
#define CBDSR 0x4c /* Capture bundle destination size register */
#define CFWCR 0x5c /* Firewall operation control register */
#define CLFCR 0x60 /* Capture low-pass filter control register */
#define CDOCR 0x64 /* Capture data output control register */
#define CDDCR 0x68 /* Capture data complexity level register */
#define CDDAR 0x6c /* Capture data complexity level address register */
#define CEIER 0x70 /* Capture event interrupt enable register */
#define CETCR 0x74 /* Capture event flag clear register */
#define CSTSR 0x7c /* Capture status register */
#define CSRTR 0x80 /* Capture software reset register */
#define CDSSR 0x84 /* Capture data size register */
#define CDAYR2 0x90 /* Capture data address Y register 2 */
#define CDACR2 0x94 /* Capture data address C register 2 */
#define CDBYR2 0x98 /* Capture data bottom-field address Y register 2 */
#define CDBCR2 0x9c /* Capture data bottom-field address C register 2 */
#undef DEBUG_GEOMETRY
#ifdef DEBUG_GEOMETRY
#define dev_geo dev_info
#else
#define dev_geo dev_dbg
#endif
/* per video frame buffer */
struct sh_mobile_ceu_buffer {
struct videobuf_buffer vb; /* v4l buffer must be first */
const struct soc_camera_data_format *fmt;
};
struct sh_mobile_ceu_dev {
struct soc_camera_host ici;
struct soc_camera_device *icd;
unsigned int irq;
void __iomem *base;
unsigned long video_limit;
/* lock used to protect videobuf */
spinlock_t lock;
struct list_head capture;
struct videobuf_buffer *active;
struct sh_mobile_ceu_info *pdata;
u32 cflcr;
unsigned int is_interlaced:1;
unsigned int image_mode:1;
unsigned int is_16bit:1;
};
struct sh_mobile_ceu_cam {
struct v4l2_rect ceu_rect;
unsigned int cam_width;
unsigned int cam_height;
const struct soc_camera_data_format *extra_fmt;
const struct soc_camera_data_format *camera_fmt;
};
static unsigned long make_bus_param(struct sh_mobile_ceu_dev *pcdev)
{
unsigned long flags;
flags = SOCAM_MASTER |
SOCAM_PCLK_SAMPLE_RISING |
SOCAM_HSYNC_ACTIVE_HIGH |
SOCAM_HSYNC_ACTIVE_LOW |
SOCAM_VSYNC_ACTIVE_HIGH |
SOCAM_VSYNC_ACTIVE_LOW |
SOCAM_DATA_ACTIVE_HIGH;
if (pcdev->pdata->flags & SH_CEU_FLAG_USE_8BIT_BUS)
flags |= SOCAM_DATAWIDTH_8;
if (pcdev->pdata->flags & SH_CEU_FLAG_USE_16BIT_BUS)
flags |= SOCAM_DATAWIDTH_16;
if (flags & SOCAM_DATAWIDTH_MASK)
return flags;
return 0;
}
static void ceu_write(struct sh_mobile_ceu_dev *priv,
unsigned long reg_offs, u32 data)
{
iowrite32(data, priv->base + reg_offs);
}
static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long reg_offs)
{
return ioread32(priv->base + reg_offs);
}
static int sh_mobile_ceu_soft_reset(struct sh_mobile_ceu_dev *pcdev)
{
int i, success = 0;
struct soc_camera_device *icd = pcdev->icd;
ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
/* wait CSTSR.CPTON bit */
for (i = 0; i < 1000; i++) {
if (!(ceu_read(pcdev, CSTSR) & 1)) {
success++;
break;
}
udelay(1);
}
/* wait CAPSR.CPKIL bit */
for (i = 0; i < 1000; i++) {
if (!(ceu_read(pcdev, CAPSR) & (1 << 16))) {
success++;
break;
}
udelay(1);
}
if (2 != success) {
dev_warn(&icd->dev, "soft reset time out\n");
return -EIO;
}
return 0;
}
/*
* Videobuf operations
*/
static int sh_mobile_ceu_videobuf_setup(struct videobuf_queue *vq,
unsigned int *count,
unsigned int *size)
{
struct soc_camera_device *icd = vq->priv_data;
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct sh_mobile_ceu_dev *pcdev = ici->priv;
int bytes_per_pixel = (icd->current_fmt->depth + 7) >> 3;
*size = PAGE_ALIGN(icd->user_width * icd->user_height *
bytes_per_pixel);
if (0 == *count)
*count = 2;
if (pcdev->video_limit) {
while (*size * *count > pcdev->video_limit)
(*count)--;
}
dev_dbg(icd->dev.parent, "count=%d, size=%d\n", *count, *size);
return 0;
}
static void free_buffer(struct videobuf_queue *vq,
struct sh_mobile_ceu_buffer *buf)
{
struct soc_camera_device *icd = vq->priv_data;
struct device *dev = icd->dev.parent;
dev_dbg(dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
&buf->vb, buf->vb.baddr, buf->vb.bsize);
if (in_interrupt())
BUG();
videobuf_waiton(&buf->vb, 0, 0);
videobuf_dma_contig_free(vq, &buf->vb);
dev_dbg(dev, "%s freed\n", __func__);
buf->vb.state = VIDEOBUF_NEEDS_INIT;
}
#define CEU_CETCR_MAGIC 0x0317f313 /* acknowledge magical interrupt sources */
#define CEU_CETCR_IGRW (1 << 4) /* prohibited register access interrupt bit */
#define CEU_CEIER_CPEIE (1 << 0) /* one-frame capture end interrupt */
#define CEU_CEIER_VBP (1 << 20) /* vbp error */
#define CEU_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
#define CEU_CEIER_MASK (CEU_CEIER_CPEIE | CEU_CEIER_VBP)
/*
* return value doesn't reflex the success/failure to queue the new buffer,
* but rather the status of the previous buffer.
*/
static int sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
{
struct soc_camera_device *icd = pcdev->icd;
dma_addr_t phys_addr_top, phys_addr_bottom;
u32 status;
int ret = 0;
/* The hardware is _very_ picky about this sequence. Especially
* the CEU_CETCR_MAGIC value. It seems like we need to acknowledge
* several not-so-well documented interrupt sources in CETCR.
*/
ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) & ~CEU_CEIER_MASK);
status = ceu_read(pcdev, CETCR);
ceu_write(pcdev, CETCR, ~status & CEU_CETCR_MAGIC);
ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_MASK);
ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
/*
* When a VBP interrupt occurs, a capture end interrupt does not occur
* and the image of that frame is not captured correctly. So, soft reset
* is needed here.
*/
if (status & CEU_CEIER_VBP) {
sh_mobile_ceu_soft_reset(pcdev);
ret = -EIO;
}
if (!pcdev->active)
return ret;
phys_addr_top = videobuf_to_dma_contig(pcdev->active);
ceu_write(pcdev, CDAYR, phys_addr_top);
if (pcdev->is_interlaced) {
phys_addr_bottom = phys_addr_top + icd->user_width;
ceu_write(pcdev, CDBYR, phys_addr_bottom);
}
switch (icd->current_fmt->fourcc) {
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV21:
case V4L2_PIX_FMT_NV16:
case V4L2_PIX_FMT_NV61:
phys_addr_top += icd->user_width *
icd->user_height;
ceu_write(pcdev, CDACR, phys_addr_top);
if (pcdev->is_interlaced) {
phys_addr_bottom = phys_addr_top +
icd->user_width;
ceu_write(pcdev, CDBCR, phys_addr_bottom);
}
}
pcdev->active->state = VIDEOBUF_ACTIVE;
ceu_write(pcdev, CAPSR, 0x1); /* start capture */
return ret;
}
static int sh_mobile_ceu_videobuf_prepare(struct videobuf_queue *vq,
struct videobuf_buffer *vb,
enum v4l2_field field)
{
struct soc_camera_device *icd = vq->priv_data;
struct sh_mobile_ceu_buffer *buf;
int ret;
buf = container_of(vb, struct sh_mobile_ceu_buffer, vb);
dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
vb, vb->baddr, vb->bsize);
/* Added list head initialization on alloc */
WARN_ON(!list_empty(&vb->queue));
#ifdef DEBUG
/* This can be useful if you want to see if we actually fill
* the buffer with something */
memset((void *)vb->baddr, 0xaa, vb->bsize);
#endif
BUG_ON(NULL == icd->current_fmt);
if (buf->fmt != icd->current_fmt ||
vb->width != icd->user_width ||
vb->height != icd->user_height ||
vb->field != field) {
buf->fmt = icd->current_fmt;
vb->width = icd->user_width;
vb->height = icd->user_height;
vb->field = field;
vb->state = VIDEOBUF_NEEDS_INIT;
}
vb->size = vb->width * vb->height * ((buf->fmt->depth + 7) >> 3);
if (0 != vb->baddr && vb->bsize < vb->size) {
ret = -EINVAL;
goto out;
}
if (vb->state == VIDEOBUF_NEEDS_INIT) {
ret = videobuf_iolock(vq, vb, NULL);
if (ret)
goto fail;
vb->state = VIDEOBUF_PREPARED;
}
return 0;
fail:
free_buffer(vq, buf);
out:
return ret;
}
/* Called under spinlock_irqsave(&pcdev->lock, ...) */
static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq,
struct videobuf_buffer *vb)
{
struct soc_camera_device *icd = vq->priv_data;
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct sh_mobile_ceu_dev *pcdev = ici->priv;
dev_dbg(icd->dev.parent, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
vb, vb->baddr, vb->bsize);
vb->state = VIDEOBUF_QUEUED;
list_add_tail(&vb->queue, &pcdev->capture);
if (!pcdev->active) {
/*
* Because there were no active buffer at this moment,
* we are not interested in the return value of
* sh_mobile_ceu_capture here.
*/
pcdev->active = vb;
sh_mobile_ceu_capture(pcdev);
}
}
static void sh_mobile_ceu_videobuf_release(struct videobuf_queue *vq,
struct videobuf_buffer *vb)
{
struct soc_camera_device *icd = vq->priv_data;
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct sh_mobile_ceu_dev *pcdev = ici->priv;
unsigned long flags;
spin_lock_irqsave(&pcdev->lock, flags);
if (pcdev->active == vb) {
/* disable capture (release DMA buffer), reset */
ceu_write(pcdev, CAPSR, 1 << 16);
pcdev->active = NULL;
}
if ((vb->state == VIDEOBUF_ACTIVE || vb->state == VIDEOBUF_QUEUED) &&
!list_empty(&vb->queue)) {
vb->state = VIDEOBUF_ERROR;
list_del_init(&vb->queue);
}
spin_unlock_irqrestore(&pcdev->lock, flags);
free_buffer(vq, container_of(vb, struct sh_mobile_ceu_buffer, vb));
}
static struct videobuf_queue_ops sh_mobile_ceu_videobuf_ops = {
.buf_setup = sh_mobile_ceu_videobuf_setup,
.buf_prepare = sh_mobile_ceu_videobuf_prepare,
.buf_queue = sh_mobile_ceu_videobuf_queue,
.buf_release = sh_mobile_ceu_videobuf_release,
};
static irqreturn_t sh_mobile_ceu_irq(int irq, void *data)
{
struct sh_mobile_ceu_dev *pcdev = data;
struct videobuf_buffer *vb;
unsigned long flags;
spin_lock_irqsave(&pcdev->lock, flags);
vb = pcdev->active;
if (!vb)
/* Stale interrupt from a released buffer */
goto out;
list_del_init(&vb->queue);
if (!list_empty(&pcdev->capture))
pcdev->active = list_entry(pcdev->capture.next,
struct videobuf_buffer, queue);
else
pcdev->active = NULL;
vb->state = (sh_mobile_ceu_capture(pcdev) < 0) ?
VIDEOBUF_ERROR : VIDEOBUF_DONE;
do_gettimeofday(&vb->ts);
vb->field_count++;
wake_up(&vb->done);
out:
spin_unlock_irqrestore(&pcdev->lock, flags);
return IRQ_HANDLED;
}
/* Called with .video_lock held */
static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
{
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct sh_mobile_ceu_dev *pcdev = ici->priv;
if (pcdev->icd)
return -EBUSY;
dev_info(icd->dev.parent,
"SuperH Mobile CEU driver attached to camera %d\n",
icd->devnum);
pm_runtime_get_sync(ici->v4l2_dev.dev);
pcdev->icd = icd;
return sh_mobile_ceu_soft_reset(pcdev);
}
/* Called with .video_lock held */
static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
{
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct sh_mobile_ceu_dev *pcdev = ici->priv;
unsigned long flags;
BUG_ON(icd != pcdev->icd);
/* disable capture, disable interrupts */
ceu_write(pcdev, CEIER, 0);
sh_mobile_ceu_soft_reset(pcdev);
/* make sure active buffer is canceled */
spin_lock_irqsave(&pcdev->lock, flags);
if (pcdev->active) {
list_del(&pcdev->active->queue);
pcdev->active->state = VIDEOBUF_ERROR;
wake_up_all(&pcdev->active->done);
pcdev->active = NULL;
}
spin_unlock_irqrestore(&pcdev->lock, flags);
pm_runtime_put_sync(ici->v4l2_dev.dev);
dev_info(icd->dev.parent,
"SuperH Mobile CEU driver detached from camera %d\n",
icd->devnum);
pcdev->icd = NULL;
}
/*
* See chapter 29.4.12 "Capture Filter Control Register (CFLCR)"
* in SH7722 Hardware Manual
*/
static unsigned int size_dst(unsigned int src, unsigned int scale)
{
unsigned int mant_pre = scale >> 12;
if (!src || !scale)
return src;
return ((mant_pre + 2 * (src - 1)) / (2 * mant_pre) - 1) *
mant_pre * 4096 / scale + 1;
}
static u16 calc_scale(unsigned int src, unsigned int *dst)
{
u16 scale;
if (src == *dst)
return 0;
scale = (src * 4096 / *dst) & ~7;
while (scale > 4096 && size_dst(src, scale) < *dst)
scale -= 8;
*dst = size_dst(src, scale);
return scale;
}
/* rect is guaranteed to not exceed the scaled camera rectangle */
static void sh_mobile_ceu_set_rect(struct soc_camera_device *icd,
unsigned int out_width,
unsigned int out_height)
{
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct sh_mobile_ceu_cam *cam = icd->host_priv;
struct v4l2_rect *rect = &cam->ceu_rect;
struct sh_mobile_ceu_dev *pcdev = ici->priv;
unsigned int height, width, cdwdr_width, in_width, in_height;
unsigned int left_offset, top_offset;
u32 camor;
dev_dbg(icd->dev.parent, "Crop %ux%u@%u:%u\n",
rect->width, rect->height, rect->left, rect->top);
left_offset = rect->left;
top_offset = rect->top;
if (pcdev->image_mode) {
in_width = rect->width;
if (!pcdev->is_16bit) {
in_width *= 2;
left_offset *= 2;
}
width = cdwdr_width = out_width;
} else {
unsigned int w_factor = (icd->current_fmt->depth + 7) >> 3;
width = out_width * w_factor / 2;
if (!pcdev->is_16bit)
w_factor *= 2;
in_width = rect->width * w_factor / 2;
left_offset = left_offset * w_factor / 2;
cdwdr_width = width * 2;
}
height = out_height;
in_height = rect->height;
if (pcdev->is_interlaced) {
height /= 2;
in_height /= 2;
top_offset /= 2;
cdwdr_width *= 2;
}
/* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */
camor = left_offset | (top_offset << 16);
dev_geo(icd->dev.parent,
"CAMOR 0x%x, CAPWR 0x%x, CFSZR 0x%x, CDWDR 0x%x\n", camor,
(in_height << 16) | in_width, (height << 16) | width,
cdwdr_width);
ceu_write(pcdev, CAMOR, camor);
ceu_write(pcdev, CAPWR, (in_height << 16) | in_width);
ceu_write(pcdev, CFSZR, (height << 16) | width);
ceu_write(pcdev, CDWDR, cdwdr_width);
}
static u32 capture_save_reset(struct sh_mobile_ceu_dev *pcdev)
{
u32 capsr = ceu_read(pcdev, CAPSR);
ceu_write(pcdev, CAPSR, 1 << 16); /* reset, stop capture */
return capsr;
}
static void capture_restore(struct sh_mobile_ceu_dev *pcdev, u32 capsr)
{
unsigned long timeout = jiffies + 10 * HZ;
/*
* Wait until the end of the current frame. It can take a long time,
* but if it has been aborted by a CAPSR reset, it shoule exit sooner.
*/
while ((ceu_read(pcdev, CSTSR) & 1) && time_before(jiffies, timeout))
msleep(1);
if (time_after(jiffies, timeout)) {
dev_err(pcdev->ici.v4l2_dev.dev,
"Timeout waiting for frame end! Interface problem?\n");
return;
}
/* Wait until reset clears, this shall not hang... */
while (ceu_read(pcdev, CAPSR) & (1 << 16))
udelay(10);
/* Anything to restore? */
if (capsr & ~(1 << 16))
ceu_write(pcdev, CAPSR, capsr);
}
static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd,
__u32 pixfmt)
{
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct sh_mobile_ceu_dev *pcdev = ici->priv;
int ret;
unsigned long camera_flags, common_flags, value;
int yuv_lineskip;
struct sh_mobile_ceu_cam *cam = icd->host_priv;
u32 capsr = capture_save_reset(pcdev);
camera_flags = icd->ops->query_bus_param(icd);
common_flags = soc_camera_bus_param_compatible(camera_flags,
make_bus_param(pcdev));
if (!common_flags)
return -EINVAL;
ret = icd->ops->set_bus_param(icd, common_flags);
if (ret < 0)
return ret;
switch (common_flags & SOCAM_DATAWIDTH_MASK) {
case SOCAM_DATAWIDTH_8:
pcdev->is_16bit = 0;
break;
case SOCAM_DATAWIDTH_16:
pcdev->is_16bit = 1;
break;
default:
return -EINVAL;
}
ceu_write(pcdev, CRCNTR, 0);
ceu_write(pcdev, CRCMPR, 0);
value = 0x00000010; /* data fetch by default */
yuv_lineskip = 0;
switch (icd->current_fmt->fourcc) {
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV21:
yuv_lineskip = 1; /* skip for NV12/21, no skip for NV16/61 */
/* fall-through */
case V4L2_PIX_FMT_NV16:
case V4L2_PIX_FMT_NV61:
switch (cam->camera_fmt->fourcc) {
case V4L2_PIX_FMT_UYVY:
value = 0x00000000; /* Cb0, Y0, Cr0, Y1 */
break;
case V4L2_PIX_FMT_VYUY:
value = 0x00000100; /* Cr0, Y0, Cb0, Y1 */
break;
case V4L2_PIX_FMT_YUYV:
value = 0x00000200; /* Y0, Cb0, Y1, Cr0 */
break;
case V4L2_PIX_FMT_YVYU:
value = 0x00000300; /* Y0, Cr0, Y1, Cb0 */
break;
default:
BUG();
}
}
if (icd->current_fmt->fourcc == V4L2_PIX_FMT_NV21 ||
icd->current_fmt->fourcc == V4L2_PIX_FMT_NV61)
value ^= 0x00000100; /* swap U, V to change from NV1x->NVx1 */
value |= common_flags & SOCAM_VSYNC_ACTIVE_LOW ? 1 << 1 : 0;
value |= common_flags & SOCAM_HSYNC_ACTIVE_LOW ? 1 << 0 : 0;
value |= pcdev->is_16bit ? 1 << 12 : 0;
ceu_write(pcdev, CAMCR, value);
ceu_write(pcdev, CAPCR, 0x00300000);
ceu_write(pcdev, CAIFR, pcdev->is_interlaced ? 0x101 : 0);
sh_mobile_ceu_set_rect(icd, icd->user_width, icd->user_height);
mdelay(1);
ceu_write(pcdev, CFLCR, pcdev->cflcr);
/* A few words about byte order (observed in Big Endian mode)
*
* In data fetch mode bytes are received in chunks of 8 bytes.
* D0, D1, D2, D3, D4, D5, D6, D7 (D0 received first)
*
* The data is however by default written to memory in reverse order:
* D7, D6, D5, D4, D3, D2, D1, D0 (D7 written to lowest byte)
*
* The lowest three bits of CDOCR allows us to do swapping,
* using 7 we swap the data bytes to match the incoming order:
* D0, D1, D2, D3, D4, D5, D6, D7
*/
value = 0x00000017;
if (yuv_lineskip)
value &= ~0x00000010; /* convert 4:2:2 -> 4:2:0 */
ceu_write(pcdev, CDOCR, value);
ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
dev_dbg(icd->dev.parent, "S_FMT successful for %c%c%c%c %ux%u\n",
pixfmt & 0xff, (pixfmt >> 8) & 0xff,
(pixfmt >> 16) & 0xff, (pixfmt >> 24) & 0xff,
icd->user_width, icd->user_height);
capture_restore(pcdev, capsr);
/* not in bundle mode: skip CBDSR, CDAYR2, CDACR2, CDBYR2, CDBCR2 */
return 0;
}
static int sh_mobile_ceu_try_bus_param(struct soc_camera_device *icd)
{
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct sh_mobile_ceu_dev *pcdev = ici->priv;
unsigned long camera_flags, common_flags;
camera_flags = icd->ops->query_bus_param(icd);
common_flags = soc_camera_bus_param_compatible(camera_flags,
make_bus_param(pcdev));
if (!common_flags)
return -EINVAL;
return 0;
}
static const struct soc_camera_data_format sh_mobile_ceu_formats[] = {
{
.name = "NV12",
.depth = 12,
.fourcc = V4L2_PIX_FMT_NV12,
.colorspace = V4L2_COLORSPACE_JPEG,
},
{
.name = "NV21",
.depth = 12,
.fourcc = V4L2_PIX_FMT_NV21,
.colorspace = V4L2_COLORSPACE_JPEG,
},
{
.name = "NV16",
.depth = 16,
.fourcc = V4L2_PIX_FMT_NV16,
.colorspace = V4L2_COLORSPACE_JPEG,
},
{
.name = "NV61",
.depth = 16,
.fourcc = V4L2_PIX_FMT_NV61,
.colorspace = V4L2_COLORSPACE_JPEG,
},
};
static int sh_mobile_ceu_get_formats(struct soc_camera_device *icd, int idx,
struct soc_camera_format_xlate *xlate)
{
struct device *dev = icd->dev.parent;
int ret, k, n;
int formats = 0;
struct sh_mobile_ceu_cam *cam;
ret = sh_mobile_ceu_try_bus_param(icd);
if (ret < 0)
return 0;
if (!icd->host_priv) {
cam = kzalloc(sizeof(*cam), GFP_KERNEL);
if (!cam)
return -ENOMEM;
icd->host_priv = cam;
} else {
cam = icd->host_priv;
}
/* Beginning of a pass */
if (!idx)
cam->extra_fmt = NULL;
switch (icd->formats[idx].fourcc) {
case V4L2_PIX_FMT_UYVY:
case V4L2_PIX_FMT_VYUY:
case V4L2_PIX_FMT_YUYV:
case V4L2_PIX_FMT_YVYU:
if (cam->extra_fmt)
goto add_single_format;
/*
* Our case is simple so far: for any of the above four camera
* formats we add all our four synthesized NV* formats, so,
* just marking the device with a single flag suffices. If
* the format generation rules are more complex, you would have
* to actually hang your already added / counted formats onto
* the host_priv pointer and check whether the format you're
* going to add now is already there.
*/
cam->extra_fmt = (void *)sh_mobile_ceu_formats;
n = ARRAY_SIZE(sh_mobile_ceu_formats);
formats += n;
for (k = 0; xlate && k < n; k++) {
xlate->host_fmt = &sh_mobile_ceu_formats[k];
xlate->cam_fmt = icd->formats + idx;
xlate->buswidth = icd->formats[idx].depth;
xlate++;
dev_dbg(dev, "Providing format %s using %s\n",
sh_mobile_ceu_formats[k].name,
icd->formats[idx].name);
}
default:
add_single_format:
/* Generic pass-through */
formats++;
if (xlate) {
xlate->host_fmt = icd->formats + idx;
xlate->cam_fmt = icd->formats + idx;
xlate->buswidth = icd->formats[idx].depth;
xlate++;
dev_dbg(dev,
"Providing format %s in pass-through mode\n",
icd->formats[idx].name);
}
}
return formats;
}
static void sh_mobile_ceu_put_formats(struct soc_camera_device *icd)
{
kfree(icd->host_priv);
icd->host_priv = NULL;
}
/* Check if any dimension of r1 is smaller than respective one of r2 */
static bool is_smaller(struct v4l2_rect *r1, struct v4l2_rect *r2)
{
return r1->width < r2->width || r1->height < r2->height;
}
/* Check if r1 fails to cover r2 */
static bool is_inside(struct v4l2_rect *r1, struct v4l2_rect *r2)
{
return r1->left > r2->left || r1->top > r2->top ||
r1->left + r1->width < r2->left + r2->width ||
r1->top + r1->height < r2->top + r2->height;
}
static unsigned int scale_down(unsigned int size, unsigned int scale)
{
return (size * 4096 + scale / 2) / scale;
}
static unsigned int scale_up(unsigned int size, unsigned int scale)
{
return (size * scale + 2048) / 4096;
}
static unsigned int calc_generic_scale(unsigned int input, unsigned int output)
{
return (input * 4096 + output / 2) / output;
}
static int client_g_rect(struct v4l2_subdev *sd, struct v4l2_rect *rect)
{
struct v4l2_crop crop;
struct v4l2_cropcap cap;
int ret;
crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ret = v4l2_subdev_call(sd, video, g_crop, &crop);
if (!ret) {
*rect = crop.c;
return ret;
}
/* Camera driver doesn't support .g_crop(), assume default rectangle */
cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ret = v4l2_subdev_call(sd, video, cropcap, &cap);
if (ret < 0)
return ret;
*rect = cap.defrect;
return ret;
}
/*
* The common for both scaling and cropping iterative approach is:
* 1. try if the client can produce exactly what requested by the user
* 2. if (1) failed, try to double the client image until we get one big enough
* 3. if (2) failed, try to request the maximum image
*/
static int client_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *crop,
struct v4l2_crop *cam_crop)
{
struct v4l2_rect *rect = &crop->c, *cam_rect = &cam_crop->c;
struct device *dev = sd->v4l2_dev->dev;
struct v4l2_cropcap cap;
int ret;
unsigned int width, height;
v4l2_subdev_call(sd, video, s_crop, crop);
ret = client_g_rect(sd, cam_rect);
if (ret < 0)
return ret;
/*
* Now cam_crop contains the current camera input rectangle, and it must
* be within camera cropcap bounds
*/
if (!memcmp(rect, cam_rect, sizeof(*rect))) {
/* Even if camera S_CROP failed, but camera rectangle matches */
dev_dbg(dev, "Camera S_CROP successful for %ux%u@%u:%u\n",
rect->width, rect->height, rect->left, rect->top);
return 0;
}
/* Try to fix cropping, that camera hasn't managed to set */
dev_geo(dev, "Fix camera S_CROP for %ux%u@%u:%u to %ux%u@%u:%u\n",
cam_rect->width, cam_rect->height,
cam_rect->left, cam_rect->top,
rect->width, rect->height, rect->left, rect->top);
/* We need sensor maximum rectangle */
ret = v4l2_subdev_call(sd, video, cropcap, &cap);
if (ret < 0)
return ret;
soc_camera_limit_side(&rect->left, &rect->width, cap.bounds.left, 2,
cap.bounds.width);
soc_camera_limit_side(&rect->top, &rect->height, cap.bounds.top, 4,
cap.bounds.height);
/*
* Popular special case - some cameras can only handle fixed sizes like
* QVGA, VGA,... Take care to avoid infinite loop.
*/
width = max(cam_rect->width, 2);
height = max(cam_rect->height, 2);
while (!ret && (is_smaller(cam_rect, rect) ||
is_inside(cam_rect, rect)) &&
(cap.bounds.width > width || cap.bounds.height > height)) {
width *= 2;
height *= 2;
cam_rect->width = width;
cam_rect->height = height;
/*
* We do not know what capabilities the camera has to set up
* left and top borders. We could try to be smarter in iterating
* them, e.g., if camera current left is to the right of the
* target left, set it to the middle point between the current
* left and minimum left. But that would add too much
* complexity: we would have to iterate each border separately.
*/
if (cam_rect->left > rect->left)
cam_rect->left = cap.bounds.left;
if (cam_rect->left + cam_rect->width < rect->left + rect->width)
cam_rect->width = rect->left + rect->width -
cam_rect->left;
if (cam_rect->top > rect->top)
cam_rect->top = cap.bounds.top;
if (cam_rect->top + cam_rect->height < rect->top + rect->height)
cam_rect->height = rect->top + rect->height -
cam_rect->top;
v4l2_subdev_call(sd, video, s_crop, cam_crop);
ret = client_g_rect(sd, cam_rect);
dev_geo(dev, "Camera S_CROP %d for %ux%u@%u:%u\n", ret,
cam_rect->width, cam_rect->height,
cam_rect->left, cam_rect->top);
}
/* S_CROP must not modify the rectangle */
if (is_smaller(cam_rect, rect) || is_inside(cam_rect, rect)) {
/*
* The camera failed to configure a suitable cropping,
* we cannot use the current rectangle, set to max
*/
*cam_rect = cap.bounds;
v4l2_subdev_call(sd, video, s_crop, cam_crop);
ret = client_g_rect(sd, cam_rect);
dev_geo(dev, "Camera S_CROP %d for max %ux%u@%u:%u\n", ret,
cam_rect->width, cam_rect->height,
cam_rect->left, cam_rect->top);
}
return ret;
}
static int get_camera_scales(struct v4l2_subdev *sd, struct v4l2_rect *rect,
unsigned int *scale_h, unsigned int *scale_v)
{
struct v4l2_format f;
int ret;
f.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ret = v4l2_subdev_call(sd, video, g_fmt, &f);
if (ret < 0)
return ret;
*scale_h = calc_generic_scale(rect->width, f.fmt.pix.width);
*scale_v = calc_generic_scale(rect->height, f.fmt.pix.height);
return 0;
}
static int get_camera_subwin(struct soc_camera_device *icd,
struct v4l2_rect *cam_subrect,
unsigned int cam_hscale, unsigned int cam_vscale)
{
struct sh_mobile_ceu_cam *cam = icd->host_priv;
struct v4l2_rect *ceu_rect = &cam->ceu_rect;
if (!ceu_rect->width) {
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
struct device *dev = icd->dev.parent;
struct v4l2_format f;
struct v4l2_pix_format *pix = &f.fmt.pix;
int ret;
/* First time */
f.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ret = v4l2_subdev_call(sd, video, g_fmt, &f);
if (ret < 0)
return ret;
dev_geo(dev, "camera fmt %ux%u\n", pix->width, pix->height);
if (pix->width > 2560) {
ceu_rect->width = 2560;
ceu_rect->left = (pix->width - 2560) / 2;
} else {
ceu_rect->width = pix->width;
ceu_rect->left = 0;
}
if (pix->height > 1920) {
ceu_rect->height = 1920;
ceu_rect->top = (pix->height - 1920) / 2;
} else {
ceu_rect->height = pix->height;
ceu_rect->top = 0;
}
dev_geo(dev, "initialised CEU rect %ux%u@%u:%u\n",
ceu_rect->width, ceu_rect->height,
ceu_rect->left, ceu_rect->top);
}
cam_subrect->width = scale_up(ceu_rect->width, cam_hscale);
cam_subrect->left = scale_up(ceu_rect->left, cam_hscale);
cam_subrect->height = scale_up(ceu_rect->height, cam_vscale);
cam_subrect->top = scale_up(ceu_rect->top, cam_vscale);
return 0;
}
static int client_s_fmt(struct soc_camera_device *icd, struct v4l2_format *f,
bool ceu_can_scale)
{
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
struct device *dev = icd->dev.parent;
struct v4l2_pix_format *pix = &f->fmt.pix;
unsigned int width = pix->width, height = pix->height, tmp_w, tmp_h;
unsigned int max_width, max_height;
struct v4l2_cropcap cap;
int ret;
cap.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ret = v4l2_subdev_call(sd, video, cropcap, &cap);
if (ret < 0)
return ret;
max_width = min(cap.bounds.width, 2560);
max_height = min(cap.bounds.height, 1920);
ret = v4l2_subdev_call(sd, video, s_fmt, f);
if (ret < 0)
return ret;
dev_geo(dev, "camera scaled to %ux%u\n", pix->width, pix->height);
if ((width == pix->width && height == pix->height) || !ceu_can_scale)
return 0;
/* Camera set a format, but geometry is not precise, try to improve */
tmp_w = pix->width;
tmp_h = pix->height;
/* width <= max_width && height <= max_height - guaranteed by try_fmt */
while ((width > tmp_w || height > tmp_h) &&
tmp_w < max_width && tmp_h < max_height) {
tmp_w = min(2 * tmp_w, max_width);
tmp_h = min(2 * tmp_h, max_height);
pix->width = tmp_w;
pix->height = tmp_h;
ret = v4l2_subdev_call(sd, video, s_fmt, f);
dev_geo(dev, "Camera scaled to %ux%u\n",
pix->width, pix->height);
if (ret < 0) {
/* This shouldn't happen */
dev_err(dev, "Client failed to set format: %d\n", ret);
return ret;
}
}
return 0;
}
/**
* @rect - camera cropped rectangle
* @sub_rect - CEU cropped rectangle, mapped back to camera input area
* @ceu_rect - on output calculated CEU crop rectangle
*/
static int client_scale(struct soc_camera_device *icd, struct v4l2_rect *rect,
struct v4l2_rect *sub_rect, struct v4l2_rect *ceu_rect,
struct v4l2_format *f, bool ceu_can_scale)
{
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
struct sh_mobile_ceu_cam *cam = icd->host_priv;
struct device *dev = icd->dev.parent;
struct v4l2_format f_tmp = *f;
struct v4l2_pix_format *pix_tmp = &f_tmp.fmt.pix;
unsigned int scale_h, scale_v;
int ret;
/* 5. Apply iterative camera S_FMT for camera user window. */
ret = client_s_fmt(icd, &f_tmp, ceu_can_scale);
if (ret < 0)
return ret;
dev_geo(dev, "5: camera scaled to %ux%u\n",
pix_tmp->width, pix_tmp->height);
/* 6. Retrieve camera output window (g_fmt) */
/* unneeded - it is already in "f_tmp" */
/* 7. Calculate new camera scales. */
ret = get_camera_scales(sd, rect, &scale_h, &scale_v);
if (ret < 0)
return ret;
dev_geo(dev, "7: camera scales %u:%u\n", scale_h, scale_v);
cam->cam_width = pix_tmp->width;
cam->cam_height = pix_tmp->height;
f->fmt.pix.width = pix_tmp->width;
f->fmt.pix.height = pix_tmp->height;
/*
* 8. Calculate new CEU crop - apply camera scales to previously
* calculated "effective" crop.
*/
ceu_rect->left = scale_down(sub_rect->left, scale_h);
ceu_rect->width = scale_down(sub_rect->width, scale_h);
ceu_rect->top = scale_down(sub_rect->top, scale_v);
ceu_rect->height = scale_down(sub_rect->height, scale_v);
dev_geo(dev, "8: new CEU rect %ux%u@%u:%u\n",
ceu_rect->width, ceu_rect->height,
ceu_rect->left, ceu_rect->top);
return 0;
}
/* Get combined scales */
static int get_scales(struct soc_camera_device *icd,
unsigned int *scale_h, unsigned int *scale_v)
{
struct sh_mobile_ceu_cam *cam = icd->host_priv;
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
struct v4l2_crop cam_crop;
unsigned int width_in, height_in;
int ret;
cam_crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ret = client_g_rect(sd, &cam_crop.c);
if (ret < 0)
return ret;
ret = get_camera_scales(sd, &cam_crop.c, scale_h, scale_v);
if (ret < 0)
return ret;
width_in = scale_up(cam->ceu_rect.width, *scale_h);
height_in = scale_up(cam->ceu_rect.height, *scale_v);
*scale_h = calc_generic_scale(width_in, icd->user_width);
*scale_v = calc_generic_scale(height_in, icd->user_height);
return 0;
}
/*
* CEU can scale and crop, but we don't want to waste bandwidth and kill the
* framerate by always requesting the maximum image from the client. See
* Documentation/video4linux/sh_mobile_camera_ceu.txt for a description of
* scaling and cropping algorithms and for the meaning of referenced here steps.
*/
static int sh_mobile_ceu_set_crop(struct soc_camera_device *icd,
struct v4l2_crop *a)
{
struct v4l2_rect *rect = &a->c;
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct sh_mobile_ceu_dev *pcdev = ici->priv;
struct v4l2_crop cam_crop;
struct sh_mobile_ceu_cam *cam = icd->host_priv;
struct v4l2_rect *cam_rect = &cam_crop.c, *ceu_rect = &cam->ceu_rect;
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
struct device *dev = icd->dev.parent;
struct v4l2_format f;
struct v4l2_pix_format *pix = &f.fmt.pix;
unsigned int scale_comb_h, scale_comb_v, scale_ceu_h, scale_ceu_v,
out_width, out_height;
u32 capsr, cflcr;
int ret;
/* 1. Calculate current combined scales. */
ret = get_scales(icd, &scale_comb_h, &scale_comb_v);
if (ret < 0)
return ret;
dev_geo(dev, "1: combined scales %u:%u\n", scale_comb_h, scale_comb_v);
/* 2. Apply iterative camera S_CROP for new input window. */
ret = client_s_crop(sd, a, &cam_crop);
if (ret < 0)
return ret;
dev_geo(dev, "2: camera cropped to %ux%u@%u:%u\n",
cam_rect->width, cam_rect->height,
cam_rect->left, cam_rect->top);
/* On success cam_crop contains current camera crop */
/*
* 3. If old combined scales applied to new crop produce an impossible
* user window, adjust scales to produce nearest possible window.
*/
out_width = scale_down(rect->width, scale_comb_h);
out_height = scale_down(rect->height, scale_comb_v);
if (out_width > 2560)
out_width = 2560;
else if (out_width < 2)
out_width = 2;
if (out_height > 1920)
out_height = 1920;
else if (out_height < 4)
out_height = 4;
dev_geo(dev, "3: Adjusted output %ux%u\n", out_width, out_height);
/* 4. Use G_CROP to retrieve actual input window: already in cam_crop */
/*
* 5. Using actual input window and calculated combined scales calculate
* camera target output window.
*/
pix->width = scale_down(cam_rect->width, scale_comb_h);
pix->height = scale_down(cam_rect->height, scale_comb_v);
dev_geo(dev, "5: camera target %ux%u\n", pix->width, pix->height);
/* 6. - 9. */
pix->pixelformat = cam->camera_fmt->fourcc;
pix->colorspace = cam->camera_fmt->colorspace;
capsr = capture_save_reset(pcdev);
dev_dbg(dev, "CAPSR 0x%x, CFLCR 0x%x\n", capsr, pcdev->cflcr);
/* Make relative to camera rectangle */
rect->left -= cam_rect->left;
rect->top -= cam_rect->top;
f.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ret = client_scale(icd, cam_rect, rect, ceu_rect, &f,
pcdev->image_mode && !pcdev->is_interlaced);
dev_geo(dev, "6-9: %d\n", ret);
/* 10. Use CEU cropping to crop to the new window. */
sh_mobile_ceu_set_rect(icd, out_width, out_height);
dev_geo(dev, "10: CEU cropped to %ux%u@%u:%u\n",
ceu_rect->width, ceu_rect->height,
ceu_rect->left, ceu_rect->top);
/*
* 11. Calculate CEU scales from camera scales from results of (10) and
* user window from (3)
*/
scale_ceu_h = calc_scale(ceu_rect->width, &out_width);
scale_ceu_v = calc_scale(ceu_rect->height, &out_height);
dev_geo(dev, "11: CEU scales %u:%u\n", scale_ceu_h, scale_ceu_v);
/* 12. Apply CEU scales. */
cflcr = scale_ceu_h | (scale_ceu_v << 16);
if (cflcr != pcdev->cflcr) {
pcdev->cflcr = cflcr;
ceu_write(pcdev, CFLCR, cflcr);
}
/* Restore capture */
if (pcdev->active)
capsr |= 1;
capture_restore(pcdev, capsr);
icd->user_width = out_width;
icd->user_height = out_height;
/* Even if only camera cropping succeeded */
return ret;
}
/* Similar to set_crop multistage iterative algorithm */
static int sh_mobile_ceu_set_fmt(struct soc_camera_device *icd,
struct v4l2_format *f)
{
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct sh_mobile_ceu_dev *pcdev = ici->priv;
struct sh_mobile_ceu_cam *cam = icd->host_priv;
struct v4l2_pix_format *pix = &f->fmt.pix;
struct v4l2_format cam_f = *f;
struct v4l2_pix_format *cam_pix = &cam_f.fmt.pix;
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
struct device *dev = icd->dev.parent;
__u32 pixfmt = pix->pixelformat;
const struct soc_camera_format_xlate *xlate;
struct v4l2_crop cam_crop;
struct v4l2_rect *cam_rect = &cam_crop.c, cam_subrect, ceu_rect;
unsigned int scale_cam_h, scale_cam_v;
u16 scale_v, scale_h;
int ret;
bool is_interlaced, image_mode;
switch (pix->field) {
case V4L2_FIELD_INTERLACED:
is_interlaced = true;
break;
case V4L2_FIELD_ANY:
default:
pix->field = V4L2_FIELD_NONE;
/* fall-through */
case V4L2_FIELD_NONE:
is_interlaced = false;
break;
}
xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
if (!xlate) {
dev_warn(dev, "Format %x not found\n", pixfmt);
return -EINVAL;
}
/* 1. Calculate current camera scales. */
cam_crop.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ret = client_g_rect(sd, cam_rect);
if (ret < 0)
return ret;
ret = get_camera_scales(sd, cam_rect, &scale_cam_h, &scale_cam_v);
if (ret < 0)
return ret;
dev_geo(dev, "1: camera scales %u:%u\n", scale_cam_h, scale_cam_v);
/*
* 2. Calculate "effective" input crop (sensor subwindow) - CEU crop
* scaled back at current camera scales onto input window.
*/
ret = get_camera_subwin(icd, &cam_subrect, scale_cam_h, scale_cam_v);
if (ret < 0)
return ret;
dev_geo(dev, "2: subwin %ux%u@%u:%u\n",
cam_subrect.width, cam_subrect.height,
cam_subrect.left, cam_subrect.top);
/*
* 3. Calculate new combined scales from "effective" input window to
* requested user window.
*/
scale_h = calc_generic_scale(cam_subrect.width, pix->width);
scale_v = calc_generic_scale(cam_subrect.height, pix->height);
dev_geo(dev, "3: scales %u:%u\n", scale_h, scale_v);
/*
* 4. Calculate camera output window by applying combined scales to real
* input window.
*/
cam_pix->width = scale_down(cam_rect->width, scale_h);
cam_pix->height = scale_down(cam_rect->height, scale_v);
cam_pix->pixelformat = xlate->cam_fmt->fourcc;
switch (pixfmt) {
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV21:
case V4L2_PIX_FMT_NV16:
case V4L2_PIX_FMT_NV61:
image_mode = true;
break;
default:
image_mode = false;
}
dev_geo(dev, "4: camera output %ux%u\n",
cam_pix->width, cam_pix->height);
/* 5. - 9. */
ret = client_scale(icd, cam_rect, &cam_subrect, &ceu_rect, &cam_f,
image_mode && !is_interlaced);
dev_geo(dev, "5-9: client scale %d\n", ret);
/* Done with the camera. Now see if we can improve the result */
dev_dbg(dev, "Camera %d fmt %ux%u, requested %ux%u\n",
ret, cam_pix->width, cam_pix->height, pix->width, pix->height);
if (ret < 0)
return ret;
/* 10. Use CEU scaling to scale to the requested user window. */
/* We cannot scale up */
if (pix->width > cam_pix->width)
pix->width = cam_pix->width;
if (pix->width > ceu_rect.width)
pix->width = ceu_rect.width;
if (pix->height > cam_pix->height)
pix->height = cam_pix->height;
if (pix->height > ceu_rect.height)
pix->height = ceu_rect.height;
/* Let's rock: scale pix->{width x height} down to width x height */
scale_h = calc_scale(ceu_rect.width, &pix->width);
scale_v = calc_scale(ceu_rect.height, &pix->height);
dev_geo(dev, "10: W: %u : 0x%x = %u, H: %u : 0x%x = %u\n",
ceu_rect.width, scale_h, pix->width,
ceu_rect.height, scale_v, pix->height);
pcdev->cflcr = scale_h | (scale_v << 16);
icd->buswidth = xlate->buswidth;
icd->current_fmt = xlate->host_fmt;
cam->camera_fmt = xlate->cam_fmt;
cam->ceu_rect = ceu_rect;
pcdev->is_interlaced = is_interlaced;
pcdev->image_mode = image_mode;
return 0;
}
static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
struct v4l2_format *f)
{
const struct soc_camera_format_xlate *xlate;
struct v4l2_pix_format *pix = &f->fmt.pix;
struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
__u32 pixfmt = pix->pixelformat;
int width, height;
int ret;
xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
if (!xlate) {
dev_warn(icd->dev.parent, "Format %x not found\n", pixfmt);
return -EINVAL;
}
/* FIXME: calculate using depth and bus width */
v4l_bound_align_image(&pix->width, 2, 2560, 1,
&pix->height, 4, 1920, 2, 0);
width = pix->width;
height = pix->height;
pix->bytesperline = pix->width *
DIV_ROUND_UP(xlate->host_fmt->depth, 8);
pix->sizeimage = pix->height * pix->bytesperline;
pix->pixelformat = xlate->cam_fmt->fourcc;
/* limit to sensor capabilities */
ret = v4l2_subdev_call(sd, video, try_fmt, f);
pix->pixelformat = pixfmt;
if (ret < 0)
return ret;
switch (pixfmt) {
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV21:
case V4L2_PIX_FMT_NV16:
case V4L2_PIX_FMT_NV61:
/* FIXME: check against rect_max after converting soc-camera */
/* We can scale precisely, need a bigger image from camera */
if (pix->width < width || pix->height < height) {
int tmp_w = pix->width, tmp_h = pix->height;
pix->width = 2560;
pix->height = 1920;
ret = v4l2_subdev_call(sd, video, try_fmt, f);
if (ret < 0) {
/* Shouldn't actually happen... */
dev_err(icd->dev.parent,
"FIXME: try_fmt() returned %d\n", ret);
pix->width = tmp_w;
pix->height = tmp_h;
}
}
if (pix->width > width)
pix->width = width;
if (pix->height > height)
pix->height = height;
}
return ret;
}
static int sh_mobile_ceu_reqbufs(struct soc_camera_file *icf,
struct v4l2_requestbuffers *p)
{
int i;
/* This is for locking debugging only. I removed spinlocks and now I
* check whether .prepare is ever called on a linked buffer, or whether
* a dma IRQ can occur for an in-work or unlinked buffer. Until now
* it hadn't triggered */
for (i = 0; i < p->count; i++) {
struct sh_mobile_ceu_buffer *buf;
buf = container_of(icf->vb_vidq.bufs[i],
struct sh_mobile_ceu_buffer, vb);
INIT_LIST_HEAD(&buf->vb.queue);
}
return 0;
}
static unsigned int sh_mobile_ceu_poll(struct file *file, poll_table *pt)
{
struct soc_camera_file *icf = file->private_data;
struct sh_mobile_ceu_buffer *buf;
buf = list_entry(icf->vb_vidq.stream.next,
struct sh_mobile_ceu_buffer, vb.stream);
poll_wait(file, &buf->vb.done, pt);
if (buf->vb.state == VIDEOBUF_DONE ||
buf->vb.state == VIDEOBUF_ERROR)
return POLLIN|POLLRDNORM;
return 0;
}
static int sh_mobile_ceu_querycap(struct soc_camera_host *ici,
struct v4l2_capability *cap)
{
strlcpy(cap->card, "SuperH_Mobile_CEU", sizeof(cap->card));
cap->version = KERNEL_VERSION(0, 0, 5);
cap->capabilities = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_STREAMING;
return 0;
}
static void sh_mobile_ceu_init_videobuf(struct videobuf_queue *q,
struct soc_camera_device *icd)
{
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct sh_mobile_ceu_dev *pcdev = ici->priv;
videobuf_queue_dma_contig_init(q,
&sh_mobile_ceu_videobuf_ops,
icd->dev.parent, &pcdev->lock,
V4L2_BUF_TYPE_VIDEO_CAPTURE,
pcdev->is_interlaced ?
V4L2_FIELD_INTERLACED : V4L2_FIELD_NONE,
sizeof(struct sh_mobile_ceu_buffer),
icd);
}
static int sh_mobile_ceu_get_ctrl(struct soc_camera_device *icd,
struct v4l2_control *ctrl)
{
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct sh_mobile_ceu_dev *pcdev = ici->priv;
u32 val;
switch (ctrl->id) {
case V4L2_CID_SHARPNESS:
val = ceu_read(pcdev, CLFCR);
ctrl->value = val ^ 1;
return 0;
}
return -ENOIOCTLCMD;
}
static int sh_mobile_ceu_set_ctrl(struct soc_camera_device *icd,
struct v4l2_control *ctrl)
{
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct sh_mobile_ceu_dev *pcdev = ici->priv;
switch (ctrl->id) {
case V4L2_CID_SHARPNESS:
switch (icd->current_fmt->fourcc) {
case V4L2_PIX_FMT_NV12:
case V4L2_PIX_FMT_NV21:
case V4L2_PIX_FMT_NV16:
case V4L2_PIX_FMT_NV61:
ceu_write(pcdev, CLFCR, !ctrl->value);
return 0;
}
return -EINVAL;
}
return -ENOIOCTLCMD;
}
static const struct v4l2_queryctrl sh_mobile_ceu_controls[] = {
{
.id = V4L2_CID_SHARPNESS,
.type = V4L2_CTRL_TYPE_BOOLEAN,
.name = "Low-pass filter",
.minimum = 0,
.maximum = 1,
.step = 1,
.default_value = 0,
},
};
static struct soc_camera_host_ops sh_mobile_ceu_host_ops = {
.owner = THIS_MODULE,
.add = sh_mobile_ceu_add_device,
.remove = sh_mobile_ceu_remove_device,
.get_formats = sh_mobile_ceu_get_formats,
.put_formats = sh_mobile_ceu_put_formats,
.set_crop = sh_mobile_ceu_set_crop,
.set_fmt = sh_mobile_ceu_set_fmt,
.try_fmt = sh_mobile_ceu_try_fmt,
.set_ctrl = sh_mobile_ceu_set_ctrl,
.get_ctrl = sh_mobile_ceu_get_ctrl,
.reqbufs = sh_mobile_ceu_reqbufs,
.poll = sh_mobile_ceu_poll,
.querycap = sh_mobile_ceu_querycap,
.set_bus_param = sh_mobile_ceu_set_bus_param,
.init_videobuf = sh_mobile_ceu_init_videobuf,
.controls = sh_mobile_ceu_controls,
.num_controls = ARRAY_SIZE(sh_mobile_ceu_controls),
};
static int __devinit sh_mobile_ceu_probe(struct platform_device *pdev)
{
struct sh_mobile_ceu_dev *pcdev;
struct resource *res;
void __iomem *base;
unsigned int irq;
int err = 0;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
irq = platform_get_irq(pdev, 0);
if (!res || !irq) {
dev_err(&pdev->dev, "Not enough CEU platform resources.\n");
err = -ENODEV;
goto exit;
}
pcdev = kzalloc(sizeof(*pcdev), GFP_KERNEL);
if (!pcdev) {
dev_err(&pdev->dev, "Could not allocate pcdev\n");
err = -ENOMEM;
goto exit;
}
INIT_LIST_HEAD(&pcdev->capture);
spin_lock_init(&pcdev->lock);
pcdev->pdata = pdev->dev.platform_data;
if (!pcdev->pdata) {
err = -EINVAL;
dev_err(&pdev->dev, "CEU platform data not set.\n");
goto exit_kfree;
}
base = ioremap_nocache(res->start, resource_size(res));
if (!base) {
err = -ENXIO;
dev_err(&pdev->dev, "Unable to ioremap CEU registers.\n");
goto exit_kfree;
}
pcdev->irq = irq;
pcdev->base = base;
pcdev->video_limit = 0; /* only enabled if second resource exists */
res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
if (res) {
err = dma_declare_coherent_memory(&pdev->dev, res->start,
res->start,
resource_size(res),
DMA_MEMORY_MAP |
DMA_MEMORY_EXCLUSIVE);
if (!err) {
dev_err(&pdev->dev, "Unable to declare CEU memory.\n");
err = -ENXIO;
goto exit_iounmap;
}
pcdev->video_limit = resource_size(res);
}
/* request irq */
err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
dev_name(&pdev->dev), pcdev);
if (err) {
dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
goto exit_release_mem;
}
pm_suspend_ignore_children(&pdev->dev, true);
pm_runtime_enable(&pdev->dev);
pm_runtime_resume(&pdev->dev);
pcdev->ici.priv = pcdev;
pcdev->ici.v4l2_dev.dev = &pdev->dev;
pcdev->ici.nr = pdev->id;
pcdev->ici.drv_name = dev_name(&pdev->dev);
pcdev->ici.ops = &sh_mobile_ceu_host_ops;
err = soc_camera_host_register(&pcdev->ici);
if (err)
goto exit_free_clk;
return 0;
exit_free_clk:
pm_runtime_disable(&pdev->dev);
free_irq(pcdev->irq, pcdev);
exit_release_mem:
if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
dma_release_declared_memory(&pdev->dev);
exit_iounmap:
iounmap(base);
exit_kfree:
kfree(pcdev);
exit:
return err;
}
static int __devexit sh_mobile_ceu_remove(struct platform_device *pdev)
{
struct soc_camera_host *soc_host = to_soc_camera_host(&pdev->dev);
struct sh_mobile_ceu_dev *pcdev = container_of(soc_host,
struct sh_mobile_ceu_dev, ici);
soc_camera_host_unregister(soc_host);
pm_runtime_disable(&pdev->dev);
free_irq(pcdev->irq, pcdev);
if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
dma_release_declared_memory(&pdev->dev);
iounmap(pcdev->base);
kfree(pcdev);
return 0;
}
static int sh_mobile_ceu_runtime_nop(struct device *dev)
{
/* Runtime PM callback shared between ->runtime_suspend()
* and ->runtime_resume(). Simply returns success.
*
* This driver re-initializes all registers after
* pm_runtime_get_sync() anyway so there is no need
* to save and restore registers here.
*/
return 0;
}
static struct dev_pm_ops sh_mobile_ceu_dev_pm_ops = {
.runtime_suspend = sh_mobile_ceu_runtime_nop,
.runtime_resume = sh_mobile_ceu_runtime_nop,
};
static struct platform_driver sh_mobile_ceu_driver = {
.driver = {
.name = "sh_mobile_ceu",
.pm = &sh_mobile_ceu_dev_pm_ops,
},
.probe = sh_mobile_ceu_probe,
.remove = __exit_p(sh_mobile_ceu_remove),
};
static int __init sh_mobile_ceu_init(void)
{
return platform_driver_register(&sh_mobile_ceu_driver);
}
static void __exit sh_mobile_ceu_exit(void)
{
platform_driver_unregister(&sh_mobile_ceu_driver);
}
module_init(sh_mobile_ceu_init);
module_exit(sh_mobile_ceu_exit);
MODULE_DESCRIPTION("SuperH Mobile CEU driver");
MODULE_AUTHOR("Magnus Damm");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:sh_mobile_ceu");