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| author | Raghuram Chary J <raghuramchary.jallipalli@microchip.com> | 2018-03-23 15:48:08 +0530 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-03-25 21:06:49 -0400 |
| commit | e69647a19c870c2f919e4d5023af8a515e8ef25f (patch) | |
| tree | ad222617d500fafe629291dd4bf2764763952fad | |
| parent | bc58a1baf2a97838a422ce4e75180c4b680e7a9b (diff) | |
| download | linux-e69647a19c870c2f919e4d5023af8a515e8ef25f.tar.gz linux-e69647a19c870c2f919e4d5023af8a515e8ef25f.tar.bz2 linux-e69647a19c870c2f919e4d5023af8a515e8ef25f.zip | |
lan78xx: Set ASD in MAC_CR when EEE is enabled.
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: 55d7de9de6c3 ("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>
| -rw-r--r-- | drivers/net/usb/lan78xx.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/net/usb/lan78xx.c b/drivers/net/usb/lan78xx.c index 60a604cc7647..90d176279152 100644 --- a/drivers/net/usb/lan78xx.c +++ b/drivers/net/usb/lan78xx.c @@ -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); |