diff options
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-core.c | 35 | ||||
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-dvb.c | 6 | ||||
| -rw-r--r-- | drivers/media/video/em28xx/em28xx-reg.h | 16 | ||||
| -rw-r--r-- | drivers/media/video/em28xx/em28xx.h | 1 |
4 files changed, 56 insertions, 2 deletions
diff --git a/drivers/media/video/em28xx/em28xx-core.c b/drivers/media/video/em28xx/em28xx-core.c index 7375353..b7a2fed 100644 --- a/drivers/media/video/em28xx/em28xx-core.c +++ b/drivers/media/video/em28xx/em28xx-core.c @@ -1012,6 +1012,41 @@ int em28xx_init_isoc(struct em28xx *dev, int max_packets, } EXPORT_SYMBOL_GPL(em28xx_init_isoc); +/* Determine the packet size for the DVB stream for the given device + (underlying value programmed into the eeprom) */ +int em28xx_isoc_dvb_max_packetsize(struct em28xx *dev) +{ + unsigned int chip_cfg2; + unsigned int packet_size = 564; + + if (dev->chip_id == CHIP_ID_EM2874) { + /* FIXME - for now assume 564 like it was before, but the + em2874 code should be added to return the proper value... */ + packet_size = 564; + } else { + /* TS max packet size stored in bits 1-0 of R01 */ + chip_cfg2 = em28xx_read_reg(dev, EM28XX_R01_CHIPCFG2); + switch (chip_cfg2 & EM28XX_CHIPCFG2_TS_PACKETSIZE_MASK) { + case EM28XX_CHIPCFG2_TS_PACKETSIZE_188: + packet_size = 188; + break; + case EM28XX_CHIPCFG2_TS_PACKETSIZE_376: + packet_size = 376; + break; + case EM28XX_CHIPCFG2_TS_PACKETSIZE_564: + packet_size = 564; + break; + case EM28XX_CHIPCFG2_TS_PACKETSIZE_752: + packet_size = 752; + break; + } + } + + em28xx_coredbg("dvb max packet size=%d\n", packet_size); + return packet_size; +} +EXPORT_SYMBOL_GPL(em28xx_isoc_dvb_max_packetsize); + /* * em28xx_wake_i2c() * configure i2c attached devices diff --git a/drivers/media/video/em28xx/em28xx-dvb.c b/drivers/media/video/em28xx/em28xx-dvb.c index c8188dc..e0438ac 100644 --- a/drivers/media/video/em28xx/em28xx-dvb.c +++ b/drivers/media/video/em28xx/em28xx-dvb.c @@ -46,7 +46,6 @@ if (debug >= level) \ } while (0) #define EM28XX_DVB_NUM_BUFS 5 -#define EM28XX_DVB_MAX_PACKETSIZE 564 #define EM28XX_DVB_MAX_PACKETS 64 struct em28xx_dvb { @@ -142,14 +141,17 @@ static int start_streaming(struct em28xx_dvb *dvb) { int rc; struct em28xx *dev = dvb->adapter.priv; + int max_dvb_packet_size; usb_set_interface(dev->udev, 0, 1); rc = em28xx_set_mode(dev, EM28XX_DIGITAL_MODE); if (rc < 0) return rc; + max_dvb_packet_size = em28xx_isoc_dvb_max_packetsize(dev); + return em28xx_init_isoc(dev, EM28XX_DVB_MAX_PACKETS, - EM28XX_DVB_NUM_BUFS, EM28XX_DVB_MAX_PACKETSIZE, + EM28XX_DVB_NUM_BUFS, max_dvb_packet_size, dvb_isoc_copy); } diff --git a/drivers/media/video/em28xx/em28xx-reg.h b/drivers/media/video/em28xx/em28xx-reg.h index 24e39c5..a2676d6 100644 --- a/drivers/media/video/em28xx/em28xx-reg.h +++ b/drivers/media/video/em28xx/em28xx-reg.h @@ -27,6 +27,22 @@ #define EM28XX_CHIPCFG_AC97 0x10 #define EM28XX_CHIPCFG_AUDIOMASK 0x30 +#define EM28XX_R01_CHIPCFG2 0x01 + +/* em28xx Chip Configuration 2 0x01 */ +#define EM28XX_CHIPCFG2_TS_PRESENT 0x10 +#define EM28XX_CHIPCFG2_TS_REQ_INTERVAL_MASK 0x0c /* bits 3-2 */ +#define EM28XX_CHIPCFG2_TS_REQ_INTERVAL_1MF 0x00 +#define EM28XX_CHIPCFG2_TS_REQ_INTERVAL_2MF 0x04 +#define EM28XX_CHIPCFG2_TS_REQ_INTERVAL_4MF 0x08 +#define EM28XX_CHIPCFG2_TS_REQ_INTERVAL_8MF 0x0c +#define EM28XX_CHIPCFG2_TS_PACKETSIZE_MASK 0x03 /* bits 0-1 */ +#define EM28XX_CHIPCFG2_TS_PACKETSIZE_188 0x00 +#define EM28XX_CHIPCFG2_TS_PACKETSIZE_376 0x01 +#define EM28XX_CHIPCFG2_TS_PACKETSIZE_564 0x02 +#define EM28XX_CHIPCFG2_TS_PACKETSIZE_752 0x03 + + /* GPIO/GPO registers */ #define EM2880_R04_GPO 0x04 /* em2880-em2883 only */ #define EM28XX_R08_GPIO 0x08 /* em2820 or upper */ diff --git a/drivers/media/video/em28xx/em28xx.h b/drivers/media/video/em28xx/em28xx.h index 16f4c23..e801f78 100644 --- a/drivers/media/video/em28xx/em28xx.h +++ b/drivers/media/video/em28xx/em28xx.h @@ -616,6 +616,7 @@ int em28xx_init_isoc(struct em28xx *dev, int max_packets, int num_bufs, int max_pkt_size, int (*isoc_copy) (struct em28xx *dev, struct urb *urb)); void em28xx_uninit_isoc(struct em28xx *dev); +int em28xx_isoc_dvb_max_packetsize(struct em28xx *dev); int em28xx_set_mode(struct em28xx *dev, enum em28xx_mode set_mode); int em28xx_gpio_set(struct em28xx *dev, struct em28xx_reg_seq *gpio); void em28xx_wake_i2c(struct em28xx *dev); |
