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Commit a77ce1bc authored by David S. Miller's avatar David S. Miller
Browse files

Merge branch 'lan78xx-fixes' 



Woojung Huh says:

====================
lan78xx: update and fixes

  lan78xx: change to use updated phy-ignore-interrupts
  lan78xx: Add to handle mux control per chip id
  lan78xx: throttle TX path at slower than SuperSpeed USB
====================

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parents ff5d7497 4b2a4a96

drivers/net/usb/lan78xx.c

+88 −44
Original line number Diff line number Diff line
@@ -36,7 +36,7 @@ 
#define DRIVER_AUTHOR	"WOOJUNG HUH <woojung.huh@microchip.com>"

#define DRIVER_DESC	"LAN78XX USB 3.0 Gigabit Ethernet Devices"

#define DRIVER_NAME	"lan78xx"

#define DRIVER_VERSION	"1.0.1"

#define DRIVER_VERSION	"1.0.2"



#define TX_TIMEOUT_JIFFIES		(5 * HZ)

#define THROTTLE_JIFFIES		(HZ / 8)
@@ -462,32 +462,53 @@ static int lan78xx_read_raw_eeprom(struct lan78xx_net *dev, u32 offset, 
				   u32 length, u8 *data)

{

	u32 val;

	u32 saved;

	int i, ret;

	int retval;



	ret = lan78xx_eeprom_confirm_not_busy(dev);

	if (ret)

		return ret;

	/* depends on chip, some EEPROM pins are muxed with LED function.

	 * disable & restore LED function to access EEPROM.

	 */

	ret = lan78xx_read_reg(dev, HW_CFG, &val);

	saved = val;

	if ((dev->devid & ID_REV_CHIP_ID_MASK_) == 0x78000000) {

		val &= ~(HW_CFG_LED1_EN_ | HW_CFG_LED0_EN_);

		ret = lan78xx_write_reg(dev, HW_CFG, val);

	}



	retval = lan78xx_eeprom_confirm_not_busy(dev);

	if (retval)

		return retval;



	for (i = 0; i < length; i++) {

		val = E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_READ_;

		val |= (offset & E2P_CMD_EPC_ADDR_MASK_);

		ret = lan78xx_write_reg(dev, E2P_CMD, val);

		if (unlikely(ret < 0))

			return -EIO;

		if (unlikely(ret < 0)) {

			retval = -EIO;

			goto exit;

		}



		ret = lan78xx_wait_eeprom(dev);

		if (ret < 0)

			return ret;

		retval = lan78xx_wait_eeprom(dev);

		if (retval < 0)

			goto exit;



		ret = lan78xx_read_reg(dev, E2P_DATA, &val);

		if (unlikely(ret < 0))

			return -EIO;

		if (unlikely(ret < 0)) {

			retval = -EIO;

			goto exit;

		}



		data[i] = val & 0xFF;

		offset++;

	}



	return 0;

	retval = 0;

exit:

	if ((dev->devid & ID_REV_CHIP_ID_MASK_) == 0x78000000)

		ret = lan78xx_write_reg(dev, HW_CFG, saved);



	return retval;

}



static int lan78xx_read_eeprom(struct lan78xx_net *dev, u32 offset,
@@ -509,44 +530,67 @@ static int lan78xx_write_raw_eeprom(struct lan78xx_net *dev, u32 offset, 
				    u32 length, u8 *data)

{

	u32 val;

	u32 saved;

	int i, ret;

	int retval;



	ret = lan78xx_eeprom_confirm_not_busy(dev);

	if (ret)

		return ret;

	/* depends on chip, some EEPROM pins are muxed with LED function.

	 * disable & restore LED function to access EEPROM.

	 */

	ret = lan78xx_read_reg(dev, HW_CFG, &val);

	saved = val;

	if ((dev->devid & ID_REV_CHIP_ID_MASK_) == 0x78000000) {

		val &= ~(HW_CFG_LED1_EN_ | HW_CFG_LED0_EN_);

		ret = lan78xx_write_reg(dev, HW_CFG, val);

	}



	retval = lan78xx_eeprom_confirm_not_busy(dev);

	if (retval)

		goto exit;



	/* Issue write/erase enable command */

	val = E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_EWEN_;

	ret = lan78xx_write_reg(dev, E2P_CMD, val);

	if (unlikely(ret < 0))

		return -EIO;

	if (unlikely(ret < 0)) {

		retval = -EIO;

		goto exit;

	}



	ret = lan78xx_wait_eeprom(dev);

	if (ret < 0)

		return ret;

	retval = lan78xx_wait_eeprom(dev);

	if (retval < 0)

		goto exit;



	for (i = 0; i < length; i++) {

		/* Fill data register */

		val = data[i];

		ret = lan78xx_write_reg(dev, E2P_DATA, val);

		if (ret < 0)

			return ret;

		if (ret < 0) {

			retval = -EIO;

			goto exit;

		}



		/* Send "write" command */

		val = E2P_CMD_EPC_BUSY_ | E2P_CMD_EPC_CMD_WRITE_;

		val |= (offset & E2P_CMD_EPC_ADDR_MASK_);

		ret = lan78xx_write_reg(dev, E2P_CMD, val);

		if (ret < 0)

			return ret;

		if (ret < 0) {

			retval = -EIO;

			goto exit;

		}



		ret = lan78xx_wait_eeprom(dev);

		if (ret < 0)

			return ret;

		retval = lan78xx_wait_eeprom(dev);

		if (retval < 0)

			goto exit;



		offset++;

	}



	return 0;

	retval = 0;

exit:

	if ((dev->devid & ID_REV_CHIP_ID_MASK_) == 0x78000000)

		ret = lan78xx_write_reg(dev, HW_CFG, saved);



	return retval;

}



static int lan78xx_read_raw_otp(struct lan78xx_net *dev, u32 offset,
@@ -904,7 +948,6 @@ static int lan78xx_link_reset(struct lan78xx_net *dev) 


	if (!phydev->link && dev->link_on) {

		dev->link_on = false;

		netif_carrier_off(dev->net);



		/* reset MAC */

		ret = lan78xx_read_reg(dev, MAC_CR, &buf);
@@ -914,6 +957,8 @@ static int lan78xx_link_reset(struct lan78xx_net *dev) 
		ret = lan78xx_write_reg(dev, MAC_CR, buf);

		if (unlikely(ret < 0))

			return -EIO;



		phy_mac_interrupt(phydev, 0);

	} else if (phydev->link && !dev->link_on) {

		dev->link_on = true;
@@ -953,7 +998,7 @@ static int lan78xx_link_reset(struct lan78xx_net *dev) 
			  ethtool_cmd_speed(&ecmd), ecmd.duplex, ladv, radv);



		ret = lan78xx_update_flowcontrol(dev, ecmd.duplex, ladv, radv);

		netif_carrier_on(dev->net);

		phy_mac_interrupt(phydev, 1);

	}



	return ret;
@@ -1495,7 +1540,6 @@ static int lan78xx_mdiobus_write(struct mii_bus *bus, int phy_id, int idx, 
static int lan78xx_mdio_init(struct lan78xx_net *dev)

{

	int ret;

	int i;



	dev->mdiobus = mdiobus_alloc();

	if (!dev->mdiobus) {
@@ -1511,10 +1555,6 @@ static int lan78xx_mdio_init(struct lan78xx_net *dev) 
	snprintf(dev->mdiobus->id, MII_BUS_ID_SIZE, "usb-%03d:%03d",

		 dev->udev->bus->busnum, dev->udev->devnum);



	/* handle our own interrupt */

	for (i = 0; i < PHY_MAX_ADDR; i++)

		dev->mdiobus->irq[i] = PHY_IGNORE_INTERRUPT;



	switch (dev->devid & ID_REV_CHIP_ID_MASK_) {

	case 0x78000000:

	case 0x78500000:
@@ -1558,6 +1598,16 @@ static int lan78xx_phy_init(struct lan78xx_net *dev) 
		return -EIO;

	}



	/* Enable PHY interrupts.

	 * We handle our own interrupt

	 */

	ret = phy_read(phydev, LAN88XX_INT_STS);

	ret = phy_write(phydev, LAN88XX_INT_MASK,

			LAN88XX_INT_MASK_MDINTPIN_EN_ |

			LAN88XX_INT_MASK_LINK_CHANGE_);



	phydev->irq = PHY_IGNORE_INTERRUPT;



	ret = phy_connect_direct(dev->net, phydev,

				 lan78xx_link_status_change,

				 PHY_INTERFACE_MODE_GMII);
@@ -1580,14 +1630,6 @@ static int lan78xx_phy_init(struct lan78xx_net *dev) 
			      SUPPORTED_Pause | SUPPORTED_Asym_Pause);

	genphy_config_aneg(phydev);



	/* Workaround to enable PHY interrupt.

	 * phy_start_interrupts() is API for requesting and enabling

	 * PHY interrupt. However, USB-to-Ethernet device can't use

	 * request_irq() called in phy_start_interrupts().

	 * Set PHY to PHY_HALTED and call phy_start()

	 * to make a call to phy_enable_interrupts()

	 */

	phy_stop(phydev);

	phy_start(phydev);



	netif_dbg(dev, ifup, dev->net, "phy initialised successfully");
@@ -2221,7 +2263,9 @@ netdev_tx_t lan78xx_start_xmit(struct sk_buff *skb, struct net_device *net) 
	if (skb2) {

		skb_queue_tail(&dev->txq_pend, skb2);



		if (skb_queue_len(&dev->txq_pend) > 10)

		/* throttle TX patch at slower than SUPER SPEED USB */

		if ((dev->udev->speed < USB_SPEED_SUPER) &&

		    (skb_queue_len(&dev->txq_pend) > 10))

			netif_stop_queue(net);

	} else {

		netif_dbg(dev, tx_err, dev->net,