diff options
Diffstat (limited to 'drivers/media/usb')
| -rw-r--r-- | drivers/media/usb/dvb-usb-v2/af9035.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/drivers/media/usb/dvb-usb-v2/af9035.c b/drivers/media/usb/dvb-usb-v2/af9035.c index b638fc1..cfcf79b 100644 --- a/drivers/media/usb/dvb-usb-v2/af9035.c +++ b/drivers/media/usb/dvb-usb-v2/af9035.c @@ -268,11 +268,29 @@ static int af9035_i2c_master_xfer(struct i2c_adapter *adap, memcpy(&buf[5], msg[0].buf, msg[0].len); ret = af9035_ctrl_msg(d, &req); } + } else if (num == 1 && (msg[0].flags & I2C_M_RD)) { + if (msg[0].len > 40) { + /* TODO: correct limits > 40 */ + ret = -EOPNOTSUPP; + } else { + /* I2C */ + u8 buf[5]; + struct usb_req req = { CMD_I2C_RD, 0, sizeof(buf), + buf, msg[0].len, msg[0].buf }; + req.mbox |= ((msg[0].addr & 0x80) >> 3); + buf[0] = msg[0].len; + buf[1] = msg[0].addr << 1; + buf[2] = 0x00; /* reg addr len */ + buf[3] = 0x00; /* reg addr MSB */ + buf[4] = 0x00; /* reg addr LSB */ + ret = af9035_ctrl_msg(d, &req); + } } else { /* - * We support only two kind of I2C transactions: - * 1) 1 x read + 1 x write + * We support only three kind of I2C transactions: + * 1) 1 x read + 1 x write (repeated start) * 2) 1 x write + * 3) 1 x read */ ret = -EOPNOTSUPP; } |