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OpenCloudOS-Kernel/drivers/media/video/sh_mobile_ceu_camera.c

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/*
* 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 <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 */
/* 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 camera_rect;
struct v4l2_rect camera_max;
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);
}
/*
* 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->rect_current.width * icd->rect_current.height *
bytes_per_pixel);
if (0 == *count)
*count = 2;
if (pcdev->video_limit) {
while (*size * *count > pcdev->video_limit)
(*count)--;
}
dev_dbg(&icd->dev, "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;
dev_dbg(&icd->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(&icd->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_CAPCR_CTNCP (1 << 16) /* continuous capture mode (if set) */
static void 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;
/* 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_CPEIE);
ceu_write(pcdev, CETCR, ~ceu_read(pcdev, CETCR) & CEU_CETCR_MAGIC);
ceu_write(pcdev, CEIER, ceu_read(pcdev, CEIER) | CEU_CEIER_CPEIE);
ceu_write(pcdev, CAPCR, ceu_read(pcdev, CAPCR) & ~CEU_CAPCR_CTNCP);
ceu_write(pcdev, CETCR, CEU_CETCR_MAGIC ^ CEU_CETCR_IGRW);
if (!pcdev->active)
return;
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->rect_current.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->rect_current.width *
icd->rect_current.height;
ceu_write(pcdev, CDACR, phys_addr_top);
if (pcdev->is_interlaced) {
phys_addr_bottom = phys_addr_top +
icd->rect_current.width;
ceu_write(pcdev, CDBCR, phys_addr_bottom);
}
}
pcdev->active->state = VIDEOBUF_ACTIVE;
ceu_write(pcdev, CAPSR, 0x1); /* start capture */
}
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, "%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->rect_current.width ||
vb->height != icd->rect_current.height ||
vb->field != field) {
buf->fmt = icd->current_fmt;
vb->width = icd->rect_current.width;
vb->height = icd->rect_current.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, "%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) {
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;
sh_mobile_ceu_capture(pcdev);
vb->state = 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,
"SuperH Mobile CEU driver attached to camera %d\n",
icd->devnum);
clk_enable(pcdev->clk);
ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
while (ceu_read(pcdev, CSTSR) & 1)
msleep(1);
pcdev->icd = icd;
return 0;
}
/* 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);
ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
/* 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);
clk_disable(pcdev->clk);
dev_info(&icd->dev,
"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 unsigned int size_src(unsigned int dst, unsigned int scale)
{
unsigned int mant_pre = scale >> 12, tmp;
if (!dst || !scale)
return dst;
for (tmp = ((dst - 1) * scale + 2048 * mant_pre) / 4096 + 1;
size_dst(tmp, scale) < dst;
tmp++)
;
return tmp;
}
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,
struct v4l2_rect *rect)
{
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct sh_mobile_ceu_cam *cam = icd->host_priv;
struct sh_mobile_ceu_dev *pcdev = ici->priv;
int width, height, cfszr_width, cdwdr_width, in_width, in_height;
unsigned int left_offset, top_offset, left, top;
unsigned int hscale = pcdev->cflcr & 0xffff;
unsigned int vscale = (pcdev->cflcr >> 16) & 0xffff;
u32 camor;
/* Switch to the camera scale */
left = size_src(rect->left, hscale);
top = size_src(rect->top, vscale);
dev_dbg(&icd->dev, "Left %u * 0x%x = %u, top %u * 0x%x = %u\n",
rect->left, hscale, left, rect->top, vscale, top);
if (left > cam->camera_rect.left) {
left_offset = left - cam->camera_rect.left;
} else {
left_offset = 0;
left = cam->camera_rect.left;
}
if (top > cam->camera_rect.top) {
top_offset = top - cam->camera_rect.top;
} else {
top_offset = 0;
top = cam->camera_rect.top;
}
dev_dbg(&icd->dev, "New left %u, top %u, offsets %u:%u\n",
rect->left, rect->top, left_offset, top_offset);
if (pcdev->image_mode) {
width = rect->width;
in_width = cam->camera_rect.width;
if (!pcdev->is_16bit) {
width *= 2;
in_width *= 2;
left_offset *= 2;
}
cfszr_width = cdwdr_width = rect->width;
} else {
unsigned int w_factor = (icd->current_fmt->depth + 7) >> 3;
if (!pcdev->is_16bit)
w_factor *= 2;
width = rect->width * w_factor / 2;
in_width = cam->camera_rect.width * w_factor / 2;
left_offset = left_offset * w_factor / 2;
cfszr_width = pcdev->is_16bit ? width : width / 2;
cdwdr_width = pcdev->is_16bit ? width * 2 : width;
}
height = rect->height;
in_height = cam->camera_rect.height;
if (pcdev->is_interlaced) {
height /= 2;
in_height /= 2;
top_offset /= 2;
cdwdr_width *= 2;
}
camor = left_offset | (top_offset << 16);
ceu_write(pcdev, CAMOR, camor);
ceu_write(pcdev, CAPWR, (in_height << 16) | in_width);
ceu_write(pcdev, CFSZR, (height << 16) | cfszr_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);
mdelay(1);
sh_mobile_ceu_set_rect(icd, &icd->rect_current);
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, "S_FMT successful for %c%c%c%c %ux%u@%u:%u\n",
pixfmt & 0xff, (pixfmt >> 8) & 0xff,
(pixfmt >> 16) & 0xff, (pixfmt >> 24) & 0xff,
icd->rect_current.width, icd->rect_current.height,
icd->rect_current.left, icd->rect_current.top);
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 soc_camera_host *ici = to_soc_camera_host(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;
cam->camera_max = icd->rect_max;
} 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(ici->v4l2_dev.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(ici->v4l2_dev.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;
}
/*
* 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. For
* cropping we also have to take care of the current scale. The common for both
* scaling and cropping 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 sh_mobile_ceu_set_crop(struct soc_camera_device *icd,
struct v4l2_rect *rect)
{
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
struct sh_mobile_ceu_dev *pcdev = ici->priv;
struct v4l2_rect cam_rect, target, cam_max;
struct sh_mobile_ceu_cam *cam = icd->host_priv;
unsigned int hscale = pcdev->cflcr & 0xffff;
unsigned int vscale = (pcdev->cflcr >> 16) & 0xffff;
unsigned short width, height;
u32 capsr;
int ret;
/* Scale back up into client units */
cam_rect.left = size_src(rect->left, hscale);
cam_rect.width = size_src(rect->width, hscale);
cam_rect.top = size_src(rect->top, vscale);
cam_rect.height = size_src(rect->height, vscale);
target = cam_rect;
capsr = capture_save_reset(pcdev);
dev_dbg(&icd->dev, "CAPSR 0x%x, CFLCR 0x%x\n", capsr, pcdev->cflcr);
/* First attempt - see if the client can deliver a perfect result */
ret = icd->ops->set_crop(icd, &cam_rect);
if (!ret && !memcmp(&target, &cam_rect, sizeof(target))) {
dev_dbg(&icd->dev, "Camera S_CROP successful for %ux%u@%u:%u\n",
cam_rect.width, cam_rect.height,
cam_rect.left, cam_rect.top);
goto ceu_set_rect;
}
/* Try to fix cropping, that camera hasn't managed to do */
dev_dbg(&icd->dev, "Fix camera S_CROP %d for %ux%u@%u:%u"
" to %ux%u@%u:%u\n",
ret, cam_rect.width, cam_rect.height,
cam_rect.left, cam_rect.top,
target.width, target.height, target.left, target.top);
/*
* Popular special case - some cameras can only handle fixed sizes like
* QVGA, VGA,... Take care to avoid infinite loop.
*/
width = max(cam_rect.width, 1);
height = max(cam_rect.height, 1);
cam_max.width = size_src(icd->rect_max.width, hscale);
cam_max.left = size_src(icd->rect_max.left, hscale);
cam_max.height = size_src(icd->rect_max.height, vscale);
cam_max.top = size_src(icd->rect_max.top, vscale);
while (!ret && (is_smaller(&cam_rect, &target) ||
is_inside(&cam_rect, &target)) &&
cam_max.width >= width && cam_max.height >= height) {
width *= 2;
height *= 2;
cam_rect.width = width;
cam_rect.height = height;
/* We do not know what the camera is capable of, play safe */
if (cam_rect.left > target.left)
cam_rect.left = cam_max.left;
if (cam_rect.left + cam_rect.width < target.left + target.width)
cam_rect.width = target.left + target.width -
cam_rect.left;
if (cam_rect.top > target.top)
cam_rect.top = cam_max.top;
if (cam_rect.top + cam_rect.height < target.top + target.height)
cam_rect.height = target.top + target.height -
cam_rect.top;
if (cam_rect.width + cam_rect.left >
cam_max.width + cam_max.left)
cam_rect.left = max(cam_max.width + cam_max.left -
cam_rect.width, cam_max.left);
if (cam_rect.height + cam_rect.top >
cam_max.height + cam_max.top)
cam_rect.top = max(cam_max.height + cam_max.top -
cam_rect.height, cam_max.top);
ret = icd->ops->set_crop(icd, &cam_rect);
dev_dbg(&icd->dev, "Camera S_CROP %d for %ux%u@%u:%u\n",
ret, cam_rect.width, cam_rect.height,
cam_rect.left, cam_rect.top);
}
/*
* If the camera failed to configure cropping, it should not modify the
* rectangle
*/
if ((ret < 0 && (is_smaller(&icd->rect_current, rect) ||
is_inside(&icd->rect_current, rect))) ||
is_smaller(&cam_rect, &target) || is_inside(&cam_rect, &target)) {
/*
* The camera failed to configure a suitable cropping,
* we cannot use the current rectangle, set to max
*/
cam_rect = cam_max;
ret = icd->ops->set_crop(icd, &cam_rect);
dev_dbg(&icd->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);
if (ret < 0)
/* All failed, hopefully resume current capture */
goto resume_capture;
/* Finally, adjust the target rectangle */
if (target.width > cam_rect.width)
target.width = cam_rect.width;
if (target.height > cam_rect.height)
target.height = cam_rect.height;
if (target.left + target.width > cam_rect.left + cam_rect.width)
target.left = cam_rect.left + cam_rect.width -
target.width;
if (target.top + target.height > cam_rect.top + cam_rect.height)
target.top = cam_rect.top + cam_rect.height -
target.height;
}
/* We now have a rectangle, larger than requested, let's crop */
/*
* We have to preserve camera rectangle between close() / open(),
* because soc-camera core calls .set_fmt() on each first open() with
* last before last close() _user_ rectangle, which can be different
* from camera rectangle.
*/
dev_dbg(&icd->dev,
"SH S_CROP from %ux%u@%u:%u to %ux%u@%u:%u, scale to %ux%u@%u:%u\n",
cam_rect.width, cam_rect.height, cam_rect.left, cam_rect.top,
target.width, target.height, target.left, target.top,
rect->width, rect->height, rect->left, rect->top);
ret = 0;
ceu_set_rect:
cam->camera_rect = cam_rect;
rect->width = size_dst(target.width, hscale);
rect->left = size_dst(target.left, hscale);
rect->height = size_dst(target.height, vscale);
rect->top = size_dst(target.top, vscale);
sh_mobile_ceu_set_rect(icd, rect);
resume_capture:
/* Set CAMOR, CAPWR, CFSZR, take care of CDWDR */
if (pcdev->active)
capsr |= 1;
capture_restore(pcdev, capsr);
/* 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;
__u32 pixfmt = pix->pixelformat;
const struct soc_camera_format_xlate *xlate;
unsigned int width = pix->width, height = pix->height, tmp_w, tmp_h;
u16 vscale, hscale;
int ret, is_interlaced;
switch (pix->field) {
case V4L2_FIELD_INTERLACED:
is_interlaced = 1;
break;
case V4L2_FIELD_ANY:
default:
pix->field = V4L2_FIELD_NONE;
/* fall-through */
case V4L2_FIELD_NONE:
is_interlaced = 0;
break;
}
xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
if (!xlate) {
dev_warn(ici->v4l2_dev.dev, "Format %x not found\n", pixfmt);
return -EINVAL;
}
pix->pixelformat = xlate->cam_fmt->fourcc;
ret = v4l2_device_call_until_err(&ici->v4l2_dev, (__u32)icd, video, s_fmt, f);
pix->pixelformat = pixfmt;
dev_dbg(&icd->dev, "Camera %d fmt %ux%u, requested %ux%u, max %ux%u\n",
ret, pix->width, pix->height, width, height,
icd->rect_max.width, icd->rect_max.height);
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:
pcdev->image_mode = 1;
break;
default:
pcdev->image_mode = 0;
}
if ((abs(width - pix->width) < 4 && abs(height - pix->height) < 4) ||
!pcdev->image_mode || is_interlaced) {
hscale = 0;
vscale = 0;
goto out;
}
/* Camera set a format, but geometry is not precise, try to improve */
/*
* FIXME: when soc-camera is converted to implement traditional S_FMT
* and S_CROP semantics, replace CEU limits with camera maxima
*/
tmp_w = pix->width;
tmp_h = pix->height;
while ((width > tmp_w || height > tmp_h) &&
tmp_w < 2560 && tmp_h < 1920) {
tmp_w = min(2 * tmp_w, (__u32)2560);
tmp_h = min(2 * tmp_h, (__u32)1920);
pix->width = tmp_w;
pix->height = tmp_h;
pix->pixelformat = xlate->cam_fmt->fourcc;
ret = v4l2_device_call_until_err(&ici->v4l2_dev, (__u32)icd,
video, s_fmt, f);
pix->pixelformat = pixfmt;
dev_dbg(&icd->dev, "Camera scaled to %ux%u\n",
pix->width, pix->height);
if (ret < 0) {
/* This shouldn't happen */
dev_err(&icd->dev, "Client failed to set format: %d\n",
ret);
return ret;
}
}
/* We cannot scale up */
if (width > pix->width)
width = pix->width;
if (height > pix->height)
height = pix->height;
/* Let's rock: scale pix->{width x height} down to width x height */
hscale = calc_scale(pix->width, &width);
vscale = calc_scale(pix->height, &height);
dev_dbg(&icd->dev, "W: %u : 0x%x = %u, H: %u : 0x%x = %u\n",
pix->width, hscale, width, pix->height, vscale, height);
out:
pcdev->cflcr = hscale | (vscale << 16);
icd->buswidth = xlate->buswidth;
icd->current_fmt = xlate->host_fmt;
cam->camera_fmt = xlate->cam_fmt;
cam->camera_rect.width = pix->width;
cam->camera_rect.height = pix->height;
icd->rect_max.left = size_dst(cam->camera_max.left, hscale);
icd->rect_max.width = size_dst(cam->camera_max.width, hscale);
icd->rect_max.top = size_dst(cam->camera_max.top, vscale);
icd->rect_max.height = size_dst(cam->camera_max.height, vscale);
icd->rect_current.left = icd->rect_max.left;
icd->rect_current.top = icd->rect_max.top;
pcdev->is_interlaced = is_interlaced;
pix->width = width;
pix->height = height;
return 0;
}
static int sh_mobile_ceu_try_fmt(struct soc_camera_device *icd,
struct v4l2_format *f)
{
struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
const struct soc_camera_format_xlate *xlate;
struct v4l2_pix_format *pix = &f->fmt.pix;
__u32 pixfmt = pix->pixelformat;
int width, height;
int ret;
xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
if (!xlate) {
dev_warn(ici->v4l2_dev.dev, "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_device_call_until_err(&ici->v4l2_dev, (__u32)icd, 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_device_call_until_err(&ici->v4l2_dev,
(__u32)icd, video,
try_fmt, f);
if (ret < 0) {
/* Shouldn't actually happen... */
dev_err(&icd->dev,
"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,
ici->v4l2_dev.dev, &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_irq;
return 0;
exit_free_irq:
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);
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");
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