tg3: Enable GPHY APD on select devices
GPHY Autopowerdown (APD) is a way to save power when energy is not
detected on the wire. At the moment, only the 5784 and 5761 are
capable of enabling this mode.
Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index 659fb99..6972fe5 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -1474,6 +1474,34 @@
tg3_writephy(tp, MII_TG3_DSP_RW_PORT, val);
}
+static void tg3_phy_toggle_apd(struct tg3 *tp, bool enable)
+{
+ u32 reg;
+
+ if (!(tp->tg3_flags2 & TG3_FLG2_5705_PLUS))
+ return;
+
+ reg = MII_TG3_MISC_SHDW_WREN |
+ MII_TG3_MISC_SHDW_SCR5_SEL |
+ MII_TG3_MISC_SHDW_SCR5_LPED |
+ MII_TG3_MISC_SHDW_SCR5_DLPTLM |
+ MII_TG3_MISC_SHDW_SCR5_SDTL |
+ MII_TG3_MISC_SHDW_SCR5_C125OE;
+ if (GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5784 || !enable)
+ reg |= MII_TG3_MISC_SHDW_SCR5_DLLAPD;
+
+ tg3_writephy(tp, MII_TG3_MISC_SHDW, reg);
+
+
+ reg = MII_TG3_MISC_SHDW_WREN |
+ MII_TG3_MISC_SHDW_APD_SEL |
+ MII_TG3_MISC_SHDW_APD_WKTM_84MS;
+ if (enable)
+ reg |= MII_TG3_MISC_SHDW_APD_ENABLE;
+
+ tg3_writephy(tp, MII_TG3_MISC_SHDW, reg);
+}
+
static void tg3_phy_toggle_automdix(struct tg3 *tp, int enable)
{
u32 phy;
@@ -1816,16 +1844,15 @@
udelay(40);
tw32_f(TG3_CPMU_LSPD_1000MB_CLK, val);
}
-
- /* Disable GPHY autopowerdown. */
- tg3_writephy(tp, MII_TG3_MISC_SHDW,
- MII_TG3_MISC_SHDW_WREN |
- MII_TG3_MISC_SHDW_APD_SEL |
- MII_TG3_MISC_SHDW_APD_WKTM_84MS);
}
tg3_phy_apply_otp(tp);
+ if (tp->tg3_flags3 & TG3_FLG3_PHY_ENABLE_APD)
+ tg3_phy_toggle_apd(tp, true);
+ else
+ tg3_phy_toggle_apd(tp, false);
+
out:
if (tp->tg3_flags2 & TG3_FLG2_PHY_ADC_BUG) {
tg3_writephy(tp, MII_TG3_AUX_CTRL, 0x0c00);
@@ -10264,6 +10291,10 @@
if (err)
return TG3_LOOPBACK_FAILED;
+ /* Turn off gphy autopowerdown. */
+ if (tp->tg3_flags3 & TG3_FLG3_PHY_ENABLE_APD)
+ tg3_phy_toggle_apd(tp, false);
+
if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5784 ||
GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5761 ||
GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5785) {
@@ -10308,6 +10339,10 @@
err |= TG3_PHY_LOOPBACK_FAILED;
}
+ /* Re-enable gphy autopowerdown. */
+ if (tp->tg3_flags3 & TG3_FLG3_PHY_ENABLE_APD)
+ tg3_phy_toggle_apd(tp, true);
+
return err;
}
@@ -11596,6 +11631,11 @@
if (cfg2 & (1 << 18))
tp->tg3_flags2 |= TG3_FLG2_SERDES_PREEMPHASIS;
+ if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5784 &&
+ GET_CHIP_REV(tp->pci_chip_rev_id) != CHIPREV_5784_AX &&
+ (cfg2 & NIC_SRAM_DATA_CFG_2_APD_EN))
+ tp->tg3_flags3 |= TG3_FLG3_PHY_ENABLE_APD;
+
if (tp->tg3_flags2 & TG3_FLG2_PCI_EXPRESS) {
u32 cfg3;
diff --git a/drivers/net/tg3.h b/drivers/net/tg3.h
index 53684b9..eba62e2 100644
--- a/drivers/net/tg3.h
+++ b/drivers/net/tg3.h
@@ -1822,6 +1822,7 @@
#define NIC_SRAM_DATA_CFG_2 0x00000d38
+#define NIC_SRAM_DATA_CFG_2_APD_EN 0x00000400
#define SHASTA_EXT_LED_MODE_MASK 0x00018000
#define SHASTA_EXT_LED_LEGACY 0x00000000
#define SHASTA_EXT_LED_SHARED 0x00008000
@@ -2619,6 +2620,7 @@
#define TG3_FLG3_RGMII_EXT_IBND_RX_EN 0x00000200
#define TG3_FLG3_RGMII_EXT_IBND_TX_EN 0x00000400
#define TG3_FLG3_CLKREQ_BUG 0x00000800
+#define TG3_FLG3_PHY_ENABLE_APD 0x00001000
struct timer_list timer;
u16 timer_counter;