diff options
Diffstat (limited to 'drivers/media/video/sh_mobile_ceu_camera.c')
| -rw-r--r-- | drivers/media/video/sh_mobile_ceu_camera.c | 96 |
1 files changed, 61 insertions, 35 deletions
diff --git a/drivers/media/video/sh_mobile_ceu_camera.c b/drivers/media/video/sh_mobile_ceu_camera.c index 76838091dc66..2407607f2eff 100644 --- a/drivers/media/video/sh_mobile_ceu_camera.c +++ b/drivers/media/video/sh_mobile_ceu_camera.c @@ -40,39 +40,39 @@ /* 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); @@ -165,6 +165,7 @@ static void sh_mobile_ceu_capture(struct sh_mobile_ceu_dev *pcdev) 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 */ } @@ -236,7 +237,7 @@ static void sh_mobile_ceu_videobuf_queue(struct videobuf_queue *vq, 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); @@ -323,12 +324,24 @@ 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); + icd->ops->release(icd); dev_info(&icd->dev, @@ -391,7 +404,20 @@ static int sh_mobile_ceu_set_bus_param(struct soc_camera_device *icd, 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 */ |