/*
* mcs7830_read_phy() - read a PHY register of the network adapter
* @udev: network device to read from
* @index: index of the PHY register to read from
* Return: non-negative 16bit register content, negative upon error
*/
static int mcs7830_read_phy(struct usb_device *udev, uint8_t index)
{
int rc;
uint16_t val;
/* issue the PHY read request and wait for its execution */
rc = mcs7830_phy_emit_wait(udev, PHY_CMD1_READ, index);
if (rc < 0)
return rc;
/* fetch the PHY data which was read */
rc = mcs7830_read_reg(udev, REG_PHY_DATA, sizeof(val), &val);
if (rc < 0)
return rc;
rc = le16_to_cpu(val);
debug("%s(%d) => 0x%04X\n", __func__, index, rc);
return rc;
}
/*
* mcs7830_write_phy() - write a PHY register of the network adapter
* @dev: network device to write to
* @index: index of the PHY register to write to
* @val: value to write to the PHY register
* Return: zero upon success, negative upon error
*/
static int mcs7830_write_phy(struct ueth_data *dev, uint8_t index, uint16_t val)
{
int rc;
debug("%s(%s, %d, 0x%04X)\n", __func__, dev->eth_dev.name, index, val);
/* setup the PHY data which is to get written */
val = cpu_to_le16(val);
rc = mcs7830_write_reg(dev, REG_PHY_DATA, sizeof(val), &val);
if (rc < 0)
return rc;
/* issue the PHY write request and wait for its execution */
rc = mcs7830_phy_emit_wait(dev, PHY_CMD1_WRITE, index);
if (rc < 0)
return rc;
return 0;
}
