[PATCH v10 01/21] soc-camera: move common code to soc_camera.c

Guennadi Liakhovetski
2013-06-11T09:28:19Z

All soc-camera host drivers include a pointer to an soc-camera device in
their host private struct to check, that only one client is connected.
Move this common code to soc_camera.c.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
---
drivers/media/platform/soc_camera/atmel-isi.c | 10 +-----
drivers/media/platform/soc_camera/mx1_camera.c | 20 +++--------
drivers/media/platform/soc_camera/mx2_camera.c | 13 +------
drivers/media/platform/soc_camera/mx3_camera.c | 9 -----
drivers/media/platform/soc_camera/omap1_camera.c | 14 +------
drivers/media/platform/soc_camera/pxa_camera.c | 18 ++-------
.../platform/soc_camera/sh_mobile_ceu_camera.c | 13 +------
drivers/media/platform/soc_camera/soc_camera.c | 38 ++++++++++++++++---
include/media/soc_camera.h | 1 +
9 files changed, 49 insertions(+), 87 deletions(-)

diff --git a/drivers/media/platform/soc_camera/atmel-isi.c b/drivers/media/platform/soc_camera/atmel-isi.c
index 1abbb36..c9e080a 100644
--- a/drivers/media/platform/soc_camera/atmel-isi.c
+++ b/drivers/media/platform/soc_camera/atmel-isi.c
@@ -102,7 +102,6 @@ struct atmel_isi {
struct list_head video_buffer_list;
struct frame_buffer *active;

- struct soc_camera_device *icd;
struct soc_camera_host soc_host;
};

@@ -367,7 +366,7 @@ static void start_dma(struct atmel_isi *isi, struct frame_buffer *buffer)

/* Check if already in a frame */
if (isi_readl(isi, ISI_STATUS) & ISI_CTRL_CDC) {
- dev_err(isi->icd->parent, "Already in frame handling.\n");
+ dev_err(isi->soc_host.icd->parent, "Already in frame handling.\n");
return;
}

@@ -753,9 +752,6 @@ static int isi_camera_add_device(struct soc_camera_device *icd)
struct atmel_isi *isi = ici->priv;
int ret;

- if (isi->icd)
- return -EBUSY;
-
ret = clk_enable(isi->pclk);
if (ret)
return ret;
@@ -766,7 +762,6 @@ static int isi_camera_add_device(struct soc_camera_device *icd)
return ret;
}

- isi->icd = icd;
dev_dbg(icd->parent, "Atmel ISI Camera driver attached to camera %d\n",
icd->devnum);
return 0;
@@ -777,11 +772,8 @@ static void isi_camera_remove_device(struct soc_camera_device *icd)
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct atmel_isi *isi = ici->priv;

- BUG_ON(icd != isi->icd);
-
clk_disable(isi->mck);
clk_disable(isi->pclk);
- isi->icd = NULL;

dev_dbg(icd->parent, "Atmel ISI Camera driver detached from camera %d\n",
icd->devnum);
diff --git a/drivers/media/platform/soc_camera/mx1_camera.c b/drivers/media/platform/soc_camera/mx1_camera.c
index a3fd8d6..5f9ec8e 100644
--- a/drivers/media/platform/soc_camera/mx1_camera.c
+++ b/drivers/media/platform/soc_camera/mx1_camera.c
@@ -104,7 +104,6 @@ struct mx1_buffer {
*/
struct mx1_camera_dev {
struct soc_camera_host soc_host;
- struct soc_camera_device *icd;
struct mx1_camera_pdata *pdata;
struct mx1_buffer *active;
struct resource *res;
@@ -220,7 +219,7 @@ out:
static int mx1_camera_setup_dma(struct mx1_camera_dev *pcdev)
{
struct videobuf_buffer *vbuf = &pcdev->active->vb;
- struct device *dev = pcdev->icd->parent;
+ struct device *dev = pcdev->soc_host.icd->parent;
int ret;

if (unlikely(!pcdev->active)) {
@@ -331,7 +330,7 @@ static void mx1_camera_wakeup(struct mx1_camera_dev *pcdev,
static void mx1_camera_dma_irq(int channel, void *data)
{
struct mx1_camera_dev *pcdev = data;
- struct device *dev = pcdev->icd->parent;
+ struct device *dev = pcdev->soc_host.icd->parent;
struct mx1_buffer *buf;
struct videobuf_buffer *vb;
unsigned long flags;
@@ -389,7 +388,7 @@ static int mclk_get_divisor(struct mx1_camera_dev *pcdev)
*/
div = (lcdclk + 2 * mclk - 1) / (2 * mclk) - 1;

- dev_dbg(pcdev->icd->parent,
+ dev_dbg(pcdev->soc_host.icd->parent,
"System clock %lukHz, target freq %dkHz, divisor %lu\n",
lcdclk / 1000, mclk / 1000, div);

@@ -400,7 +399,7 @@ static void mx1_camera_activate(struct mx1_camera_dev *pcdev)
{
unsigned int csicr1 = CSICR1_EN;

- dev_dbg(pcdev->icd->parent, "Activate device\n");
+ dev_dbg(pcdev->soc_host.icd->parent, "Activate device\n");

clk_prepare_enable(pcdev->clk);

@@ -416,7 +415,7 @@ static void mx1_camera_activate(struct mx1_camera_dev *pcdev)

static void mx1_camera_deactivate(struct mx1_camera_dev *pcdev)
{
- dev_dbg(pcdev->icd->parent, "Deactivate device\n");
+ dev_dbg(pcdev->soc_host.icd->parent, "Deactivate device\n");

/* Disable all CSI interface */
__raw_writel(0x00, pcdev->base + CSICR1);
@@ -433,16 +432,11 @@ static int mx1_camera_add_device(struct soc_camera_device *icd)
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct mx1_camera_dev *pcdev = ici->priv;

- if (pcdev->icd)
- return -EBUSY;
-
dev_info(icd->parent, "MX1 Camera driver attached to camera %d\n",
icd->devnum);

mx1_camera_activate(pcdev);

- pcdev->icd = icd;
-
return 0;
}

@@ -452,8 +446,6 @@ static void mx1_camera_remove_device(struct soc_camera_device *icd)
struct mx1_camera_dev *pcdev = ici->priv;
unsigned int csicr1;

- BUG_ON(icd != pcdev->icd);
-
/* disable interrupts */
csicr1 = __raw_readl(pcdev->base + CSICR1) & ~CSI_IRQ_MASK;
__raw_writel(csicr1, pcdev->base + CSICR1);
@@ -465,8 +457,6 @@ static void mx1_camera_remove_device(struct soc_camera_device *icd)
icd->devnum);

mx1_camera_deactivate(pcdev);
-
- pcdev->icd = NULL;
}

static int mx1_camera_set_bus_param(struct soc_camera_device *icd)
diff --git a/drivers/media/platform/soc_camera/mx2_camera.c b/drivers/media/platform/soc_camera/mx2_camera.c
index 5bbeb43..772e071 100644
--- a/drivers/media/platform/soc_camera/mx2_camera.c
+++ b/drivers/media/platform/soc_camera/mx2_camera.c
@@ -236,7 +236,6 @@ enum mx2_camera_type {
struct mx2_camera_dev {
struct device *dev;
struct soc_camera_host soc_host;
- struct soc_camera_device *icd;
struct clk *clk_emma_ahb, *clk_emma_ipg;
struct clk *clk_csi_ahb, *clk_csi_per;

@@ -394,8 +393,8 @@ static void mx27_update_emma_buf(struct mx2_camera_dev *pcdev,
writel(phys, pcdev->base_emma +
PRP_DEST_Y_PTR - 0x14 * bufnum);
if (prp->out_fmt == V4L2_PIX_FMT_YUV420) {
- u32 imgsize = pcdev->icd->user_height *
- pcdev->icd->user_width;
+ u32 imgsize = pcdev->soc_host.icd->user_height *
+ pcdev->soc_host.icd->user_width;

writel(phys + imgsize, pcdev->base_emma +
PRP_DEST_CB_PTR - 0x14 * bufnum);
@@ -424,9 +423,6 @@ static int mx2_camera_add_device(struct soc_camera_device *icd)
int ret;
u32 csicr1;

- if (pcdev->icd)
- return -EBUSY;
-
ret = clk_prepare_enable(pcdev->clk_csi_ahb);
if (ret < 0)
return ret;
@@ -441,7 +437,6 @@ static int mx2_camera_add_device(struct soc_camera_device *icd)
pcdev->csicr1 = csicr1;
writel(pcdev->csicr1, pcdev->base_csi + CSICR1);

- pcdev->icd = icd;
pcdev->frame_count = 0;

dev_info(icd->parent, "Camera driver attached to camera %d\n",
@@ -460,14 +455,10 @@ static void mx2_camera_remove_device(struct soc_camera_device *icd)
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct mx2_camera_dev *pcdev = ici->priv;

- BUG_ON(icd != pcdev->icd);
-
dev_info(icd->parent, "Camera driver detached from camera %d\n",
icd->devnum);

mx2_camera_deactivate(pcdev);
-
- pcdev->icd = NULL;
}

/*
diff --git a/drivers/media/platform/soc_camera/mx3_camera.c b/drivers/media/platform/soc_camera/mx3_camera.c
index 5da3377..71b9b19 100644
--- a/drivers/media/platform/soc_camera/mx3_camera.c
+++ b/drivers/media/platform/soc_camera/mx3_camera.c
@@ -94,7 +94,6 @@ struct mx3_camera_dev {
* Interface. If anyone ever builds hardware to enable more than one
* camera _simultaneously_, they will have to modify this driver too
*/
- struct soc_camera_device *icd;
struct clk *clk;

void __iomem *base;
@@ -517,13 +516,9 @@ static int mx3_camera_add_device(struct soc_camera_device *icd)
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct mx3_camera_dev *mx3_cam = ici->priv;

- if (mx3_cam->icd)
- return -EBUSY;
-
mx3_camera_activate(mx3_cam, icd);

mx3_cam->buf_total = 0;
- mx3_cam->icd = icd;

dev_info(icd->parent, "MX3 Camera driver attached to camera %d\n",
icd->devnum);
@@ -538,8 +533,6 @@ static void mx3_camera_remove_device(struct soc_camera_device *icd)
struct mx3_camera_dev *mx3_cam = ici->priv;
struct idmac_channel **ichan = &mx3_cam->idmac_channel[0];

- BUG_ON(icd != mx3_cam->icd);
-
if (*ichan) {
dma_release_channel(&(*ichan)->dma_chan);
*ichan = NULL;
@@ -547,8 +540,6 @@ static void mx3_camera_remove_device(struct soc_camera_device *icd)

clk_disable_unprepare(mx3_cam->clk);

- mx3_cam->icd = NULL;
-
dev_info(icd->parent, "MX3 Camera driver detached from camera %d\n",
icd->devnum);
}
diff --git a/drivers/media/platform/soc_camera/omap1_camera.c b/drivers/media/platform/soc_camera/omap1_camera.c
index 9689a6e..c42c23e 100644
--- a/drivers/media/platform/soc_camera/omap1_camera.c
+++ b/drivers/media/platform/soc_camera/omap1_camera.c
@@ -150,7 +150,6 @@ struct omap1_cam_buf {

struct omap1_cam_dev {
struct soc_camera_host soc_host;
- struct soc_camera_device *icd;
struct clk *clk;

unsigned int irq;
@@ -564,7 +563,7 @@ static void videobuf_done(struct omap1_cam_dev *pcdev,
{
struct omap1_cam_buf *buf = pcdev->active;
struct videobuf_buffer *vb;
- struct device *dev = pcdev->icd->parent;
+ struct device *dev = pcdev->soc_host.icd->parent;

if (WARN_ON(!buf)) {
suspend_capture(pcdev);
@@ -790,7 +789,7 @@ out:
static irqreturn_t cam_isr(int irq, void *data)
{
struct omap1_cam_dev *pcdev = data;
- struct device *dev = pcdev->icd->parent;
+ struct device *dev = pcdev->soc_host.icd->parent;
struct omap1_cam_buf *buf = pcdev->active;
u32 it_status;
unsigned long flags;
@@ -904,9 +903,6 @@ static int omap1_cam_add_device(struct soc_camera_device *icd)
struct omap1_cam_dev *pcdev = ici->priv;
u32 ctrlclock;

- if (pcdev->icd)
- return -EBUSY;
-
clk_enable(pcdev->clk);

/* setup sensor clock */
@@ -941,8 +937,6 @@ static int omap1_cam_add_device(struct soc_camera_device *icd)

sensor_reset(pcdev, false);

- pcdev->icd = icd;
-
dev_dbg(icd->parent, "OMAP1 Camera driver attached to camera %d\n",
icd->devnum);
return 0;
@@ -954,8 +948,6 @@ static void omap1_cam_remove_device(struct soc_camera_device *icd)
struct omap1_cam_dev *pcdev = ici->priv;
u32 ctrlclock;

- BUG_ON(icd != pcdev->icd);
-
suspend_capture(pcdev);
disable_capture(pcdev);

@@ -974,8 +966,6 @@ static void omap1_cam_remove_device(struct soc_camera_device *icd)

clk_disable(pcdev->clk);

- pcdev->icd = NULL;
-
dev_dbg(icd->parent,
"OMAP1 Camera driver detached from camera %d\n", icd->devnum);
}
diff --git a/drivers/media/platform/soc_camera/pxa_camera.c b/drivers/media/platform/soc_camera/pxa_camera.c
index d665242..686edf7 100644
--- a/drivers/media/platform/soc_camera/pxa_camera.c
+++ b/drivers/media/platform/soc_camera/pxa_camera.c
@@ -200,7 +200,6 @@ struct pxa_camera_dev {
* interface. If anyone ever builds hardware to enable more than
* one camera, they will have to modify this driver too
*/
- struct soc_camera_device *icd;
struct clk *clk;

unsigned int irq;
@@ -966,13 +965,8 @@ static int pxa_camera_add_device(struct soc_camera_device *icd)
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct pxa_camera_dev *pcdev = ici->priv;

- if (pcdev->icd)
- return -EBUSY;
-
pxa_camera_activate(pcdev);

- pcdev->icd = icd;
-
dev_info(icd->parent, "PXA Camera driver attached to camera %d\n",
icd->devnum);

@@ -985,8 +979,6 @@ static void pxa_camera_remove_device(struct soc_camera_device *icd)
struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
struct pxa_camera_dev *pcdev = ici->priv;

- BUG_ON(icd != pcdev->icd);
-
dev_info(icd->parent, "PXA Camera driver detached from camera %d\n",
icd->devnum);

@@ -999,8 +991,6 @@ static void pxa_camera_remove_device(struct soc_camera_device *icd)
DCSR(pcdev->dma_chans[2]) = 0;

pxa_camera_deactivate(pcdev);
-
- pcdev->icd = NULL;
}

static int test_platform_param(struct pxa_camera_dev *pcdev,
@@ -1596,8 +1586,8 @@ static int pxa_camera_suspend(struct device *dev)
pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR3);
pcdev->save_cicr[i++] = __raw_readl(pcdev->base + CICR4);

- if (pcdev->icd) {
- struct v4l2_subdev *sd = soc_camera_to_subdev(pcdev->icd);
+ if (pcdev->soc_host.icd) {
+ struct v4l2_subdev *sd = soc_camera_to_subdev(pcdev->soc_host.icd);
ret = v4l2_subdev_call(sd, core, s_power, 0);
if (ret == -ENOIOCTLCMD)
ret = 0;
@@ -1622,8 +1612,8 @@ static int pxa_camera_resume(struct device *dev)
__raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR3);
__raw_writel(pcdev->save_cicr[i++], pcdev->base + CICR4);

- if (pcdev->icd) {
- struct v4l2_subdev *sd = soc_camera_to_subdev(pcdev->icd);
+ if (pcdev->soc_host.icd) {
+ struct v4l2_subdev *sd = soc_camera_to_subdev(pcdev->soc_host.icd);
ret = v4l2_subdev_call(sd, core, s_power, 1);
if (ret == -ENOIOCTLCMD)
ret = 0;
diff --git a/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c b/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c
index 143d29fe..5b7d8e1 100644
--- a/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c
+++ b/drivers/media/platform/soc_camera/sh_mobile_ceu_camera.c
@@ -95,7 +95,6 @@ struct sh_mobile_ceu_buffer {

struct sh_mobile_ceu_dev {
struct soc_camera_host ici;
- struct soc_camera_device *icd;
struct platform_device *csi2_pdev;

unsigned int irq;
@@ -163,7 +162,7 @@ static u32 ceu_read(struct sh_mobile_ceu_dev *priv, unsigned long 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;
+ struct soc_camera_device *icd = pcdev->ici.icd;

ceu_write(pcdev, CAPSR, 1 << 16); /* reset */

@@ -277,7 +276,7 @@ static int sh_mobile_ceu_videobuf_setup(struct vb2_queue *vq,
*/
static int sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev)
{
- struct soc_camera_device *icd = pcdev->icd;
+ struct soc_camera_device *icd = pcdev->ici.icd;
dma_addr_t phys_addr_top, phys_addr_bottom;
unsigned long top1, top2;
unsigned long bottom1, bottom2;
@@ -552,9 +551,6 @@ static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
struct v4l2_subdev *csi2_sd;
int ret;

- if (pcdev->icd)
- return -EBUSY;
-
dev_info(icd->parent,
"SuperH Mobile CEU driver attached to camera %d\n",
icd->devnum);
@@ -583,7 +579,6 @@ static int sh_mobile_ceu_add_device(struct soc_camera_device *icd)
*/
if (ret == -ENODEV && csi2_sd)
csi2_sd->grp_id = 0;
- pcdev->icd = icd;

return 0;
}
@@ -595,8 +590,6 @@ static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
struct sh_mobile_ceu_dev *pcdev = ici->priv;
struct v4l2_subdev *csi2_sd = find_csi2(pcdev);

- BUG_ON(icd != pcdev->icd);
-
v4l2_subdev_call(csi2_sd, core, s_power, 0);
if (csi2_sd)
csi2_sd->grp_id = 0;
@@ -618,8 +611,6 @@ static void sh_mobile_ceu_remove_device(struct soc_camera_device *icd)
dev_info(icd->parent,
"SuperH Mobile CEU driver detached from camera %d\n",
icd->devnum);
-
- pcdev->icd = NULL;
}

/*
diff --git a/drivers/media/platform/soc_camera/soc_camera.c b/drivers/media/platform/soc_camera/soc_camera.c
index 3a4efbd..832f059 100644
--- a/drivers/media/platform/soc_camera/soc_camera.c
+++ b/drivers/media/platform/soc_camera/soc_camera.c
@@ -505,6 +505,32 @@ static int soc_camera_set_fmt(struct soc_camera_device *icd,
return ici->ops->set_bus_param(icd);
}

+static int soc_camera_add_device(struct soc_camera_device *icd)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+ int ret;
+
+ if (ici->icd)
+ return -EBUSY;
+
+ ret = ici->ops->add(icd);
+ if (!ret)
+ ici->icd = icd;
+
+ return ret;
+}
+
+static void soc_camera_remove_device(struct soc_camera_device *icd)
+{
+ struct soc_camera_host *ici = to_soc_camera_host(icd->parent);
+
+ if (WARN_ON(icd != ici->icd))
+ return;
+
+ ici->ops->remove(icd);
+ ici->icd = NULL;
+}
+
static int soc_camera_open(struct file *file)
{
struct video_device *vdev = video_devdata(file);
@@ -568,7 +594,7 @@ static int soc_camera_open(struct file *file)
if (sdesc->subdev_desc.reset)
sdesc->subdev_desc.reset(icd->pdev);

- ret = ici->ops->add(icd);
+ ret = soc_camera_add_device(icd);
if (ret < 0) {
dev_err(icd->pdev, "Couldn't activate the camera: %d\n", ret);
goto eiciadd;
@@ -619,7 +645,7 @@ esfmt:
eresume:
__soc_camera_power_off(icd);
epower:
- ici->ops->remove(icd);
+ soc_camera_remove_device(icd);
eiciadd:
icd->use_count--;
mutex_unlock(&ici->host_lock);
@@ -645,7 +671,7 @@ static int soc_camera_close(struct file *file)
vb2_queue_release(&icd->vb2_vidq);
__soc_camera_power_off(icd);

- ici->ops->remove(icd);
+ soc_camera_remove_device(icd);
}

if (icd->streamer == file)
@@ -1167,7 +1193,7 @@ static int soc_camera_probe(struct soc_camera_device *icd)
ssdd->reset(icd->pdev);

mutex_lock(&ici->host_lock);
- ret = ici->ops->add(icd);
+ ret = soc_camera_add_device(icd);
mutex_unlock(&ici->host_lock);
if (ret < 0)
goto eadd;
@@ -1240,7 +1266,7 @@ static int soc_camera_probe(struct soc_camera_device *icd)
icd->field = mf.field;
}

- ici->ops->remove(icd);
+ soc_camera_remove_device(icd);

mutex_unlock(&ici->host_lock);

@@ -1263,7 +1289,7 @@ eadddev:
icd->vdev = NULL;
evdc:
mutex_lock(&ici->host_lock);
- ici->ops->remove(icd);
+ soc_camera_remove_device(icd);
mutex_unlock(&ici->host_lock);
eadd:
v4l2_ctrl_handler_free(&icd->ctrl_handler);
diff --git a/include/media/soc_camera.h b/include/media/soc_camera.h
index ff77d08..5a46ce2 100644
--- a/include/media/soc_camera.h
+++ b/include/media/soc_camera.h
@@ -64,6 +64,7 @@ struct soc_camera_host {
struct mutex host_lock; /* Protect pipeline modifications */
unsigned char nr; /* Host number */
u32 capabilities;
+ struct soc_camera_device *icd; /* Currently attached client */
void *priv;
const char *drv_name;
struct soc_camera_host_ops *ops;
--
1.7.2.5