Commit c8868611 authored by Stephen Hemminger's avatar Stephen Hemminger Committed by Jeff Garzik
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[PATCH] skge: fix Yukon-Lite A0 workaround

This is one of those workarounds sucked over from sk98lin driver.
The skge driver needs to detect the Yukon-Lite A0 chip properly,
and turn of Rx FIFO Flush.
Signed-off-by: default avatarStephen Hemminger <>
Signed-off-by: default avatarJeff Garzik <>
parent 9389d79f
......@@ -1643,6 +1643,22 @@ static void yukon_reset(struct skge_hw *hw, int port)
/* Apparently, early versions of Yukon-Lite had wrong chip_id? */
static int is_yukon_lite_a0(struct skge_hw *hw)
u32 reg;
int ret;
if (hw->chip_id != CHIP_ID_YUKON)
return 0;
reg = skge_read32(hw, B2_FAR);
skge_write8(hw, B2_FAR + 3, 0xff);
ret = (skge_read8(hw, B2_FAR + 3) != 0);
skge_write32(hw, B2_FAR, reg);
return ret;
static void yukon_mac_init(struct skge_hw *hw, int port)
struct skge_port *skge = netdev_priv(hw->dev[port]);
......@@ -1758,9 +1774,11 @@ static void yukon_mac_init(struct skge_hw *hw, int port)
/* Configure Rx MAC FIFO */
skge_write16(hw, SK_REG(port, RX_GMF_FL_MSK), RX_FF_FL_DEF_MSK);
if (hw->chip_id == CHIP_ID_YUKON_LITE &&
hw->chip_rev >= CHIP_REV_YU_LITE_A3)
/* disable Rx GMAC FIFO Flush for YUKON-Lite Rev. A0 only */
if (is_yukon_lite_a0(hw))
reg &= ~GMF_RX_F_FL_ON;
skge_write8(hw, SK_REG(port, RX_GMF_CTRL_T), GMF_RST_CLR);
skge_write16(hw, SK_REG(port, RX_GMF_CTRL_T), reg);
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