+static int s630_i2c_transfer(struct i2c_adapter *adap, struct i2c_msg msg[],
+ int num)
+{
+ struct dvb_usb_device *d = i2c_get_adapdata(adap);
+ int ret = 0;
+
+ if (!d)
+ return -ENODEV;
+ if (mutex_lock_interruptible(&d->i2c_mutex) < 0)
+ return -EAGAIN;
+
+ switch (num) {
+ case 2: { /* read */
+ u8 ibuf[msg[1].len], obuf[3];
+ obuf[0] = msg[1].len;
+ obuf[1] = (msg[0].addr << 1);
+ obuf[2] = msg[0].buf[0];
+
+ ret = dw210x_op_rw(d->udev, 0x90, 0, 0,
+ obuf, 3, DW210X_WRITE_MSG);
+ msleep(5);
+ ret = dw210x_op_rw(d->udev, 0x91, 0, 0,
+ ibuf, msg[1].len, DW210X_READ_MSG);
+ memcpy(msg[1].buf, ibuf, msg[1].len);
+ break;
+ }
+ case 1:
+ switch (msg[0].addr) {
+ case 0x60:
+ case 0x0e: {
+ /* write to zl10313, zl10039 register, */
+ u8 obuf[msg[0].len + 2];
+ obuf[0] = msg[0].len + 1;
+ obuf[1] = (msg[0].addr << 1);
+ memcpy(obuf + 2, msg[0].buf, msg[0].len);
+ ret = dw210x_op_rw(d->udev, 0x80, 0, 0,
+ obuf, msg[0].len + 2, DW210X_WRITE_MSG);
+ break;
+ }
+ case (DW2102_RC_QUERY): {
+ u8 ibuf[4];
+ ret = dw210x_op_rw(d->udev, 0xb8, 0, 0,
+ ibuf, 4, DW210X_READ_MSG);
+ msg[0].buf[0] = ibuf[3];
+ break;
+ }
+ case (DW2102_VOLTAGE_CTRL): {
+ u8 obuf[2];
+ obuf[0] = 0x03;
+ obuf[1] = msg[0].buf[0];
+ ret = dw210x_op_rw(d->udev, 0x8a, 0, 0,
+ obuf, 2, DW210X_WRITE_MSG);
+ break;
+ }
+ }
+
+ break;
+ }
+
+ mutex_unlock(&d->i2c_mutex);
+ return num;
+}
+