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authorBruce Allan <bruce.w.allan@intel.com>2009-10-26 11:23:25 +0000
committerDavid S. Miller <davem@davemloft.net>2009-10-26 16:16:23 -0700
commitfa2ce13ca7a415332181adf2eb06d39e8e5054f7 (patch)
tree8e06729076f32e32eb0ca931b876886bdb1ac25a /drivers
parent53ac5a887519f0c3fc94a6acdfc22aa4e97f64f7 (diff)
e1000e: 82577/82578 requires a different method to configure LPLU
Unlike previous ICHx-based parts, the PCH-based parts (82577/82578) require LPLU (Low Power Link Up, or "reverse auto-negotiation") to be configured in the PHY rather than the MAC. Signed-off-by: Bruce Allan <bruce.w.allan@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/net/e1000e/ich8lan.c40
1 files changed, 40 insertions, 0 deletions
diff --git a/drivers/net/e1000e/ich8lan.c b/drivers/net/e1000e/ich8lan.c
index fb2222d60a7..2451dc8aef7 100644
--- a/drivers/net/e1000e/ich8lan.c
+++ b/drivers/net/e1000e/ich8lan.c
@@ -124,6 +124,11 @@
#define SW_FLAG_TIMEOUT 1000 /* SW Semaphore flag timeout in milliseconds */
+/* OEM Bits Phy Register */
+#define HV_OEM_BITS PHY_REG(768, 25)
+#define HV_OEM_BITS_LPLU 0x0004 /* Low Power Link Up */
+#define HV_OEM_BITS_RESTART_AN 0x0400 /* Restart Auto-negotiation */
+
/* ICH GbE Flash Hardware Sequencing Flash Status Register bit breakdown */
/* Offset 04h HSFSTS */
union ich8_hws_flash_status {
@@ -202,6 +207,7 @@ static s32 e1000_setup_led_pchlan(struct e1000_hw *hw);
static s32 e1000_cleanup_led_pchlan(struct e1000_hw *hw);
static s32 e1000_led_on_pchlan(struct e1000_hw *hw);
static s32 e1000_led_off_pchlan(struct e1000_hw *hw);
+static s32 e1000_set_lplu_state_pchlan(struct e1000_hw *hw, bool active);
static inline u16 __er16flash(struct e1000_hw *hw, unsigned long reg)
{
@@ -244,6 +250,8 @@ static s32 e1000_init_phy_params_pchlan(struct e1000_hw *hw)
phy->ops.check_polarity = e1000_check_polarity_ife_ich8lan;
phy->ops.read_phy_reg = e1000_read_phy_reg_hv;
+ phy->ops.set_d0_lplu_state = e1000_set_lplu_state_pchlan;
+ phy->ops.set_d3_lplu_state = e1000_set_lplu_state_pchlan;
phy->ops.write_phy_reg = e1000_write_phy_reg_hv;
phy->autoneg_mask = AUTONEG_ADVERTISE_SPEED_DEFAULT;
@@ -1060,6 +1068,38 @@ static s32 e1000_check_polarity_ife_ich8lan(struct e1000_hw *hw)
}
/**
+ * e1000_set_lplu_state_pchlan - Set Low Power Link Up state
+ * @hw: pointer to the HW structure
+ * @active: true to enable LPLU, false to disable
+ *
+ * Sets the LPLU state according to the active flag. For PCH, if OEM write
+ * bit are disabled in the NVM, writing the LPLU bits in the MAC will not set
+ * the phy speed. This function will manually set the LPLU bit and restart
+ * auto-neg as hw would do. D3 and D0 LPLU will call the same function
+ * since it configures the same bit.
+ **/
+static s32 e1000_set_lplu_state_pchlan(struct e1000_hw *hw, bool active)
+{
+ s32 ret_val = 0;
+ u16 oem_reg;
+
+ ret_val = e1e_rphy(hw, HV_OEM_BITS, &oem_reg);
+ if (ret_val)
+ goto out;
+
+ if (active)
+ oem_reg |= HV_OEM_BITS_LPLU;
+ else
+ oem_reg &= ~HV_OEM_BITS_LPLU;
+
+ oem_reg |= HV_OEM_BITS_RESTART_AN;
+ ret_val = e1e_wphy(hw, HV_OEM_BITS, oem_reg);
+
+out:
+ return ret_val;
+}
+
+/**
* e1000_set_d0_lplu_state_ich8lan - Set Low Power Linkup D0 state
* @hw: pointer to the HW structure
* @active: TRUE to enable LPLU, FALSE to disable