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V4L/DVB (9589): Properly support capture start on em2874

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Properly support capture start on em2874

The transport stream enable register moved in the em2874, so make it work
properly.

Thanks for Ray Lu from Empia for providing the em2874 datasheet.

Signed-off-by: Devin Heitmueller <devin.heitmueller@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Devin Heitmueller 2008-11-12 02:05:24 -03:00 committed by Mauro Carvalho Chehab
parent 24a613e4b0
commit ebef13d480
2 changed files with 27 additions and 0 deletions
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18
drivers/media/video/em28xx/em28xx-core.c
View File

@ -373,6 +373,24 @@ int em28xx_colorlevels_set_default(struct em28xx *dev)
int em28xx_capture_start(struct em28xx *dev, int start)
{
int rc;
if (dev->chip_id == CHIP_ID_EM2874) {
/* The Transport Stream Enable Register moved in em2874 */
if (!start) {
rc = em28xx_write_reg_bits(dev, EM2874_R5F_TS_ENABLE,
0x00,
EM2874_TS1_CAPTURE_ENABLE);
return rc;
}
/* Enable Transport Stream */
rc = em28xx_write_reg_bits(dev, EM2874_R5F_TS_ENABLE,
EM2874_TS1_CAPTURE_ENABLE,
EM2874_TS1_CAPTURE_ENABLE);
return rc;
}
/* FIXME: which is the best order? */
/* video registers are sampled by VREF */
rc = em28xx_write_reg_bits(dev, EM28XX_R0C_USBSUSP,

9
drivers/media/video/em28xx/em28xx-reg.h
View File

@ -77,8 +77,17 @@
#define EM28XX_R14_VIDEO_AC97 0x14
/* em2874 registers */
#define EM2874_R5F_TS_ENABLE 0x5f
#define EM2874_R80_GPIO 0x80
/* em2874 Transport Stream Enable Register (0x5f) */
#define EM2874_TS1_CAPTURE_ENABLE (1 << 0)
#define EM2874_TS1_FILTER_ENABLE (1 << 1)
#define EM2874_TS1_NULL_DISCARD (1 << 2)
#define EM2874_TS2_CAPTURE_ENABLE (1 << 4)
#define EM2874_TS2_FILTER_ENABLE (1 << 5)
#define EM2874_TS2_NULL_DISCARD (1 << 6)
/* register settings */
#define EM2800_AUDIO_SRC_TUNER 0x0d
#define EM2800_AUDIO_SRC_LINE 0x0c