Am 25.04.2017 um 12:06 schrieb Mauro Carvalho Chehab:
> Right now, all devices use bus 0 for eeprom. However,
> it seems that newer versions of Terratec H6 uses a different
> buffer for eeprom.
>
> So, add support to use a different I2C address for eeprom and
> add a new card ID for the board described at:
> http://forum.kodi.tv/showthread.php?tid=312902
I'm not 100% sure, but IIRC the bridge expects the eeprom to be always
on bus 0.
Anyway, looking at the information provided by the thread creator, it
seems that the eeprom is detected as usual on bus 0.
Otherwise "board has no eeprom" would have been printed to the log.
What happens here is that em28xx_i2c_read_block() fails with -ETIMEDOUT,
which means that the i2c status reported by the em2884 is (still) 0x02
or 0x04 when the timeout is reached.
See em28xx_i2c_send_bytes() and em28xx_i2c_recv_bytes().
Further tests/debugging is required to find out what exactly is going on.
Turning on debug module paramters i2c_debug and reg_debug would help.
> PS.: This patch was meant to allow testing the device. It may
> be wrong or incomplete, as it doesn't attempt to set GPIOs.
>
> Signed-off-by: Mauro Carvalho Chehab <mche...@s-opensource.com>
> ---
> drivers/media/usb/em28xx/em28xx-cards.c | 20 ++++++++++++++++++++
> drivers/media/usb/em28xx/em28xx-i2c.c | 5 +----
> drivers/media/usb/em28xx/em28xx.h | 5 ++++-
> 3 files changed, 25 insertions(+), 5 deletions(-)
>
> diff --git a/drivers/media/usb/em28xx/em28xx-cards.c
> b/drivers/media/usb/em28xx/em28xx-cards.c
> index a12b599a1fa2..b788ae0d5646 100644
> --- a/drivers/media/usb/em28xx/em28xx-cards.c
> +++ b/drivers/media/usb/em28xx/em28xx-cards.c
> @@ -1193,6 +1193,23 @@ struct em28xx_board em28xx_boards[] = {
> .i2c_speed = EM28XX_I2C_CLK_WAIT_ENABLE |
> EM28XX_I2C_FREQ_400_KHZ,
> },
> + [EM2884_BOARD_TERRATEC_H6] = {
> + .name = "Terratec Cinergy H6",
> + .has_dvb = 1,
> + .ir_codes = RC_MAP_NEC_TERRATEC_CINERGY_XS,
> +#if 0
> + .tuner_type = TUNER_PHILIPS_TDA8290,
According to the thread, the tuner is a TDA18271 !?
Regards,
Frank
> + .tuner_addr = 0x41,
> + .dvb_gpio = terratec_h5_digital, /* FIXME: probably wrong */
> + .tuner_gpio = terratec_h5_gpio,
> +#else
> + .tuner_type = TUNER_ABSENT,
> +#endif
> + .def_i2c_bus = 1,
> + .eeprom_i2c_bus = 1,
> + .i2c_speed = EM28XX_I2C_CLK_WAIT_ENABLE |
> + EM28XX_I2C_FREQ_400_KHZ,
> + },
> [EM2884_BOARD_HAUPPAUGE_WINTV_HVR_930C] = {
> .name = "Hauppauge WinTV HVR 930C",
> .has_dvb = 1,
> @@ -2496,6 +2513,8 @@ struct usb_device_id em28xx_id_table[] = {
> .driver_info = EM2884_BOARD_TERRATEC_H5 },
> { USB_DEVICE(0x0ccd, 0x10b6), /* H5 Rev. 3 */
> .driver_info = EM2884_BOARD_TERRATEC_H5 },
> + { USB_DEVICE(0x0ccd, 0x10b2), /* H6 */
> + .driver_info = EM2884_BOARD_TERRATEC_H6 },
> { USB_DEVICE(0x0ccd, 0x0084),
> .driver_info = EM2860_BOARD_TERRATEC_AV350 },
> { USB_DEVICE(0x0ccd, 0x0096),
> @@ -2669,6 +2688,7 @@ static inline void em28xx_set_model(struct em28xx *dev)
>
> /* Should be initialized early, for I2C to work */
> dev->def_i2c_bus = dev->board.def_i2c_bus;
> + dev->eeprom_i2c_bus = dev->board.eeprom_i2c_bus;
> }
>
> /* Wait until AC97_RESET reports the expected value reliably before
> proceeding.
> diff --git a/drivers/media/usb/em28xx/em28xx-i2c.c
> b/drivers/media/usb/em28xx/em28xx-i2c.c
> index 8c472d5adb50..df0ab4b6f18f 100644
> --- a/drivers/media/usb/em28xx/em28xx-i2c.c
> +++ b/drivers/media/usb/em28xx/em28xx-i2c.c
> @@ -665,8 +665,6 @@ static int em28xx_i2c_eeprom(struct em28xx *dev, unsigned
> bus,
> *eedata = NULL;
> *eedata_len = 0;
>
> - /* EEPROM is always on i2c bus 0 on all known devices. */
> -
> dev->i2c_client[bus].addr = 0xa0 >> 1;
>
> /* Check if board has eeprom */
> @@ -975,8 +973,7 @@ int em28xx_i2c_register(struct em28xx *dev, unsigned bus,
> dev->i2c_client[bus] = em28xx_client_template;
> dev->i2c_client[bus].adapter = &dev->i2c_adap[bus];
>
> - /* Up to now, all eeproms are at bus 0 */
> - if (!bus) {
> + if (bus == dev->eeprom_i2c_bus) {
> retval = em28xx_i2c_eeprom(dev, bus, &dev->eedata,
> &dev->eedata_len);
> if ((retval < 0) && (retval != -ENODEV)) {
> dev_err(&dev->intf->dev,
> diff --git a/drivers/media/usb/em28xx/em28xx.h
> b/drivers/media/usb/em28xx/em28xx.h
> index e8d97d5ec161..a333ca954129 100644
> --- a/drivers/media/usb/em28xx/em28xx.h
> +++ b/drivers/media/usb/em28xx/em28xx.h
> @@ -148,6 +148,7 @@
> #define EM28178_BOARD_PLEX_PX_BCUD 98
> #define EM28174_BOARD_HAUPPAUGE_WINTV_DUALHD_DVB 99
> #define EM28174_BOARD_HAUPPAUGE_WINTV_DUALHD_01595 100
> +#define EM2884_BOARD_TERRATEC_H6 101
>
> /* Limits minimum and default number of buffers */
> #define EM28XX_MIN_BUF 4
> @@ -440,7 +441,8 @@ struct em28xx_board {
> int vchannels;
> int tuner_type;
> int tuner_addr;
> - unsigned def_i2c_bus; /* Default I2C bus */
> + unsigned def_i2c_bus; /* Default I2C bus */
> + unsigned eeprom_i2c_bus; /* EEPROM I2C bus */
>
> /* i2c flags */
> unsigned int tda9887_conf;
> @@ -643,6 +645,7 @@ struct em28xx {
>
> unsigned char eeprom_addrwidth_16bit:1;
> unsigned def_i2c_bus; /* Default I2C bus */
> + unsigned eeprom_i2c_bus;/* EEPROM I2C bus */
> unsigned cur_i2c_bus; /* Current I2C bus */
> struct rt_mutex i2c_bus_lock;
>
