From dc56b7d46dd2b303a844166ef931270b882bf08c Mon Sep 17 00:00:00 2001
From: Michael Chan <mchan@broadcom.com>
Date: Mon, 19 Dec 2005 16:26:28 -0800
Subject: [PATCH] [TG3]: Some low power fixes
Add some missing workarounds in tg3_set_power_state():
1. Workaround to prevent overdrawing current on 5714.
2. Do not power down 5700's PHY because of hw limitation.
Signed-off-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
drivers/net/tg3.c | 16 +++++++++++++---
1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index d8691224b0b3a..de898f175d73c 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -1042,17 +1042,26 @@ static void tg3_frob_aux_power(struct tg3 *tp)
udelay(100);
} else {
u32 no_gpio2;
- u32 grc_local_ctrl;
+ u32 grc_local_ctrl = 0;
if (tp_peer != tp &&
(tp_peer->tg3_flags & TG3_FLAG_INIT_COMPLETE) != 0)
return;
+ /* Workaround to prevent overdrawing Amps. */
+ if (GET_ASIC_REV(tp->pci_chip_rev_id) ==
+ ASIC_REV_5714) {
+ grc_local_ctrl |= GRC_LCLCTRL_GPIO_OE3;
+ tw32_f(GRC_LOCAL_CTRL, tp->grc_local_ctrl |
+ grc_local_ctrl);
+ udelay(100);
+ }
+
/* On 5753 and variants, GPIO2 cannot be used. */
no_gpio2 = tp->nic_sram_data_cfg &
NIC_SRAM_DATA_CFG_NO_GPIO2;
- grc_local_ctrl = GRC_LCLCTRL_GPIO_OE0 |
+ grc_local_ctrl |= GRC_LCLCTRL_GPIO_OE0 |
GRC_LCLCTRL_GPIO_OE1 |
GRC_LCLCTRL_GPIO_OE2 |
GRC_LCLCTRL_GPIO_OUTPUT1 |
@@ -1297,7 +1306,8 @@ static int tg3_set_power_state(struct tg3 *tp, int state)
tg3_writephy(tp, MII_TG3_EXT_CTRL,
MII_TG3_EXT_CTRL_FORCE_LED_OFF);
tg3_writephy(tp, MII_TG3_AUX_CTRL, 0x01b2);
- tg3_writephy(tp, MII_BMCR, BMCR_PDOWN);
+ if (GET_ASIC_REV(tp->pci_chip_rev_id) != ASIC_REV_5700)
+ tg3_writephy(tp, MII_BMCR, BMCR_PDOWN);
}
}
--
2.30.2