#include <linux/platform_device.h>
#include <linux/mutex.h>
#include <linux/videodev2.h>
+#include <linux/clk.h>
#include <media/v4l2-common.h>
#include <media/v4l2-dev.h>
/* register offsets for sh7722 / sh7723 */
-#define CAPSR 0x00
-#define CAPCR 0x04
-#define CAMCR 0x08
-#define CMCYR 0x0c
-#define CAMOR 0x10
-#define CAPWR 0x14
-#define CAIFR 0x18
-#define CSTCR 0x20 /* not on sh7723 */
-#define CSECR 0x24 /* not on sh7723 */
-#define CRCNTR 0x28
-#define CRCMPR 0x2c
-#define CFLCR 0x30
-#define CFSZR 0x34
-#define CDWDR 0x38
-#define CDAYR 0x3c
-#define CDACR 0x40
-#define CDBYR 0x44
-#define CDBCR 0x48
-#define CBDSR 0x4c
-#define CFWCR 0x5c
-#define CLFCR 0x60
-#define CDOCR 0x64
-#define CDDCR 0x68
-#define CDDAR 0x6c
-#define CEIER 0x70
-#define CETCR 0x74
-#define CSTSR 0x7c
-#define CSRTR 0x80
-#define CDSSR 0x84
-#define CDAYR2 0x90
-#define CDACR2 0x94
-#define CDBYR2 0x98
-#define CDBCR2 0x9c
+#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 */
static DEFINE_MUTEX(camera_lock);
unsigned int irq;
void __iomem *base;
+ struct clk *clk;
unsigned long video_limit;
+ /* lock used to protect videobuf */
spinlock_t lock;
struct list_head capture;
struct videobuf_buffer *active;
ceu_write(pcdev, CETCR, 0x0317f313 ^ 0x10);
if (pcdev->active) {
+ pcdev->active->state = VIDEOBUF_ACTIVE;
ceu_write(pcdev, CDAYR, videobuf_to_dma_contig(pcdev->active));
ceu_write(pcdev, CAPSR, 0x1); /* start capture */
}
dev_dbg(&icd->dev, "%s (vb=0x%p) 0x%08lx %zd\n", __func__,
vb, vb->baddr, vb->bsize);
- vb->state = VIDEOBUF_ACTIVE;
+ vb->state = VIDEOBUF_QUEUED;
spin_lock_irqsave(&pcdev->lock, flags);
list_add_tail(&vb->queue, &pcdev->capture);
"SuperH Mobile CEU driver attached to camera %d\n",
icd->devnum);
- if (pcdev->pdata->enable_camera)
- pcdev->pdata->enable_camera();
-
ret = icd->ops->init(icd);
if (ret)
goto err;
+ clk_enable(pcdev->clk);
+
ceu_write(pcdev, CAPSR, 1 << 16); /* reset */
while (ceu_read(pcdev, CSTSR) & 1)
msleep(1);
{
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);
+
icd->ops->release(icd);
- if (pcdev->pdata->disable_camera)
- pcdev->pdata->disable_camera();
dev_info(&icd->dev,
"SuperH Mobile CEU driver detached from camera %d\n",
ceu_write(pcdev, CFLCR, 0); /* data fetch mode - no scaling */
ceu_write(pcdev, CFSZR, (icd->height << 16) | cfszr_width);
ceu_write(pcdev, CLFCR, 0); /* data fetch mode - no lowpass filter */
- ceu_write(pcdev, CDOCR, 0x00000016);
+
+ /* 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
+ */
+ ceu_write(pcdev, CDOCR, 0x00000017);
ceu_write(pcdev, CDWDR, cdwdr_width);
ceu_write(pcdev, CFWCR, 0); /* keep "datafetch firewall" disabled */
static int sh_mobile_ceu_set_fmt_cap(struct soc_camera_device *icd,
__u32 pixfmt, struct v4l2_rect *rect)
{
- return icd->ops->set_fmt_cap(icd, pixfmt, rect);
+ const struct soc_camera_data_format *cam_fmt;
+ int ret;
+
+ /*
+ * TODO: find a suitable supported by the SoC output format, check
+ * whether the sensor supports one of acceptable input formats.
+ */
+ if (pixfmt) {
+ cam_fmt = soc_camera_format_by_fourcc(icd, pixfmt);
+ if (!cam_fmt)
+ return -EINVAL;
+ }
+
+ ret = icd->ops->set_fmt_cap(icd, pixfmt, rect);
+ if (pixfmt && !ret)
+ icd->current_fmt = cam_fmt;
+
+ return ret;
}
static int sh_mobile_ceu_try_fmt_cap(struct soc_camera_device *icd,
struct v4l2_format *f)
{
+ const struct soc_camera_data_format *cam_fmt;
+ int ret = sh_mobile_ceu_try_bus_param(icd, f->fmt.pix.pixelformat);
+
+ if (ret < 0)
+ return ret;
+
+ /*
+ * TODO: find a suitable supported by the SoC output format, check
+ * whether the sensor supports one of acceptable input formats.
+ */
+ cam_fmt = soc_camera_format_by_fourcc(icd, f->fmt.pix.pixelformat);
+ if (!cam_fmt)
+ return -EINVAL;
+
/* FIXME: calculate using depth and bus width */
if (f->fmt.pix.height < 4)
f->fmt.pix.width &= ~0x01;
f->fmt.pix.height &= ~0x03;
+ f->fmt.pix.bytesperline = f->fmt.pix.width *
+ DIV_ROUND_UP(cam_fmt->depth, 8);
+ f->fmt.pix.sizeimage = f->fmt.pix.height * f->fmt.pix.bytesperline;
+
/* limit to sensor capabilities */
return icd->ops->try_fmt_cap(icd, f);
}
.reqbufs = sh_mobile_ceu_reqbufs,
.poll = sh_mobile_ceu_poll,
.querycap = sh_mobile_ceu_querycap,
- .try_bus_param = sh_mobile_ceu_try_bus_param,
.set_bus_param = sh_mobile_ceu_set_bus_param,
.init_videobuf = sh_mobile_ceu_init_videobuf,
};
struct sh_mobile_ceu_dev *pcdev;
struct resource *res;
void __iomem *base;
+ char clk_name[8];
unsigned int irq;
int err = 0;
/* request irq */
err = request_irq(pcdev->irq, sh_mobile_ceu_irq, IRQF_DISABLED,
- pdev->dev.bus_id, pcdev);
+ dev_name(&pdev->dev), pcdev);
if (err) {
dev_err(&pdev->dev, "Unable to register CEU interrupt.\n");
goto exit_release_mem;
}
+ snprintf(clk_name, sizeof(clk_name), "ceu%d", pdev->id);
+ pcdev->clk = clk_get(&pdev->dev, clk_name);
+ if (IS_ERR(pcdev->clk)) {
+ dev_err(&pdev->dev, "cannot get clock \"%s\"\n", clk_name);
+ err = PTR_ERR(pcdev->clk);
+ goto exit_free_irq;
+ }
+
pcdev->ici.priv = pcdev;
pcdev->ici.dev.parent = &pdev->dev;
pcdev->ici.nr = pdev->id;
- pcdev->ici.drv_name = pdev->dev.bus_id,
- pcdev->ici.ops = &sh_mobile_ceu_host_ops,
+ 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;
+ goto exit_free_clk;
return 0;
+exit_free_clk:
+ clk_put(pcdev->clk);
exit_free_irq:
free_irq(pcdev->irq, pcdev);
exit_release_mem:
struct sh_mobile_ceu_dev *pcdev = platform_get_drvdata(pdev);
soc_camera_host_unregister(&pcdev->ici);
+ clk_put(pcdev->clk);
free_irq(pcdev->irq, pcdev);
if (platform_get_resource(pdev, IORESOURCE_MEM, 1))
dma_release_declared_memory(&pdev->dev);
static void __exit sh_mobile_ceu_exit(void)
{
- return platform_driver_unregister(&sh_mobile_ceu_driver);
+ platform_driver_unregister(&sh_mobile_ceu_driver);
}
module_init(sh_mobile_ceu_init);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff