diff options
| author | Antti Palosaari <crope@iki.fi> | 2013-03-11 19:05:39 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2013-06-08 21:40:32 -0300 |
| commit | 3b98c347838d0a62476ea4c55daf5c315f56cbbb (patch) | |
| tree | 9bef5ef4008725df3e26a3f8dd1d87d42745042c /drivers/media/usb/dvb-usb-v2 | |
| parent | a7fab8511169bd28ba0a00501afd12fc8a1a2c61 (diff) | |
| download | op-kernel-dev-3b98c347838d0a62476ea4c55daf5c315f56cbbb.zip op-kernel-dev-3b98c347838d0a62476ea4c55daf5c315f56cbbb.tar.gz | |
[media] af9035: implement I2C adapter read operation
Signed-off-by: Antti Palosaari <crope@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/usb/dvb-usb-v2')
| -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; } |
