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lan78xx: Set ASD in MAC_CR when EEE is enabled.

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Description:
EEE does not work with lan7800 when AutoSpeed is not set.
(This can happen when EEPROM is not populated or configured incorrectly)

Root-Cause:
When EEE is enabled, the mac config register ASD is not set
i.e. in default state, causing EEE fail.

Fix:
Set the register when eeprom is not present.

Fixes: 55d7de9de6 ("Microchip's LAN7800 family USB 2/3 to 10/100/1000 Ethernet device driver")
Signed-off-by: Raghuram Chary J <raghuramchary.jallipalli@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Raghuram Chary J 2018-03-23 15:48:08 +05:30 committed by David S. Miller
parent bc58a1baf2
commit e69647a19c
1 changed files with 10 additions and 0 deletions
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10
drivers/net/usb/lan78xx.c
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@ -2351,6 +2351,7 @@ static int lan78xx_reset(struct lan78xx_net *dev)
u32 buf;
int ret = 0;
unsigned long timeout;
u8 sig;
ret = lan78xx_read_reg(dev, HW_CFG, &buf);
buf |= HW_CFG_LRST_;
@ -2450,6 +2451,15 @@ static int lan78xx_reset(struct lan78xx_net *dev)
/* LAN7801 only has RGMII mode */
if (dev->chipid == ID_REV_CHIP_ID_7801_)
buf &= ~MAC_CR_GMII_EN_;
if (dev->chipid == ID_REV_CHIP_ID_7800_) {
ret = lan78xx_read_raw_eeprom(dev, 0, 1, &sig);
if (!ret && sig != EEPROM_INDICATOR) {
/* Implies there is no external eeprom. Set mac speed */
netdev_info(dev->net, "No External EEPROM. Setting MAC Speed\n");
buf |= MAC_CR_AUTO_DUPLEX_ | MAC_CR_AUTO_SPEED_;
}
}
ret = lan78xx_write_reg(dev, MAC_CR, buf);
ret = lan78xx_read_reg(dev, MAC_TX, &buf);