From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mx3.redhat.com (mx3.redhat.com [172.16.48.32]) by int-mx1.corp.redhat.com (8.13.1/8.13.1) with ESMTP id m9ECxcMp002795 for ; Tue, 14 Oct 2008 08:59:38 -0400 Received: from rv-out-0506.google.com (rv-out-0506.google.com [209.85.198.226]) by mx3.redhat.com (8.13.8/8.13.8) with ESMTP id m9ECxL1Z012775 for ; Tue, 14 Oct 2008 08:59:22 -0400 Received: by rv-out-0506.google.com with SMTP id f6so2186740rvb.51 for ; Tue, 14 Oct 2008 05:59:21 -0700 (PDT) From: Magnus Damm To: video4linux-list@redhat.com Date: Tue, 14 Oct 2008 21:58:12 +0900 Message-Id: <20081014125812.5224.67473.sendpatchset@rx1.opensource.se> Cc: v4l-dvb-maintainer@linuxtv.org, mchehab@infradead.org Subject: [PATCH] video: add sh_mobile_ceu comments List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: video4linux-list-bounces@redhat.com Errors-To: video4linux-list-bounces@redhat.com List-ID: From: Magnus Damm This patch adds CEU hardware block comments to the sh_mobile_ceu driver. Signed-off-by: Magnus Damm --- drivers/media/video/sh_mobile_ceu_camera.c | 79 ++++++++++++++++------------ 1 file changed, 46 insertions(+), 33 deletions(-) --- 0001/drivers/media/video/sh_mobile_ceu_camera.c +++ work/drivers/media/video/sh_mobile_ceu_camera.c 2008-10-14 15:41:48.000000000 +0900 @@ -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); @@ -396,6 +396,19 @@ static int sh_mobile_ceu_set_bus_param(s 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 */ + + /* 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, + * right now we swap the data bytes to the following order: + * D1, D0, D3, D2, D5, D4, D7, D6 + */ ceu_write(pcdev, CDOCR, 0x00000016); ceu_write(pcdev, CDWDR, cdwdr_width); -- video4linux-list mailing list Unsubscribe mailto:video4linux-list-request@redhat.com?subject=unsubscribe https://www.redhat.com/mailman/listinfo/video4linux-list