[TG3]: Add PHY workaround for 5784

The 5784 B step and newer chips require the PHY DSPs to be fine-tuned
based on one-time programmable values stored in the chip.  This is
essential to achieve optimal PHY operations especially when using
long cables.  We also need to properly handle the 10Mbit RX bit in the
CPMU_CTRL register during PHY reset.

Update version to 3.89.

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>

1 files changed, 143 insertions, 11 deletions

diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index f9ef8bd..d4655b2 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -64,8 +64,8 @@
 
 #define DRV_MODULE_NAME		"tg3"
 #define PFX DRV_MODULE_NAME	": "
-#define DRV_MODULE_VERSION	"3.88"
-#define DRV_MODULE_RELDATE	"March 20, 2008"
+#define DRV_MODULE_VERSION	"3.89"
+#define DRV_MODULE_RELDATE	"April 03, 2008"
 
 #define TG3_DEF_MAC_MODE	0
 #define TG3_DEF_RX_MODE		0
@@ -804,6 +804,12 @@ static int tg3_writephy(struct tg3 *tp, int reg, u32 val)
 	return ret;
 }
 
+static void tg3_phydsp_write(struct tg3 *tp, u32 reg, u32 val)
+{
+	tg3_writephy(tp, MII_TG3_DSP_ADDRESS, reg);
+	tg3_writephy(tp, MII_TG3_DSP_RW_PORT, val);
+}
+
 static void tg3_phy_toggle_automdix(struct tg3 *tp, int enable)
 {
 	u32 phy;
@@ -886,6 +892,49 @@ static int tg3_bmcr_reset(struct tg3 *tp)
 	return 0;
 }
 
+static void tg3_phy_apply_otp(struct tg3 *tp)
+{
+	u32 otp, phy;
+
+	if (!tp->phy_otp)
+		return;
+
+	otp = tp->phy_otp;
+
+	/* Enable SM_DSP clock and tx 6dB coding. */
+	phy = MII_TG3_AUXCTL_SHDWSEL_AUXCTL |
+	      MII_TG3_AUXCTL_ACTL_SMDSP_ENA |
+	      MII_TG3_AUXCTL_ACTL_TX_6DB;
+	tg3_writephy(tp, MII_TG3_AUX_CTRL, phy);
+
+	phy = ((otp & TG3_OTP_AGCTGT_MASK) >> TG3_OTP_AGCTGT_SHIFT);
+	phy |= MII_TG3_DSP_TAP1_AGCTGT_DFLT;
+	tg3_phydsp_write(tp, MII_TG3_DSP_TAP1, phy);
+
+	phy = ((otp & TG3_OTP_HPFFLTR_MASK) >> TG3_OTP_HPFFLTR_SHIFT) |
+	      ((otp & TG3_OTP_HPFOVER_MASK) >> TG3_OTP_HPFOVER_SHIFT);
+	tg3_phydsp_write(tp, MII_TG3_DSP_AADJ1CH0, phy);
+
+	phy = ((otp & TG3_OTP_LPFDIS_MASK) >> TG3_OTP_LPFDIS_SHIFT);
+	phy |= MII_TG3_DSP_AADJ1CH3_ADCCKADJ;
+	tg3_phydsp_write(tp, MII_TG3_DSP_AADJ1CH3, phy);
+
+	phy = ((otp & TG3_OTP_VDAC_MASK) >> TG3_OTP_VDAC_SHIFT);
+	tg3_phydsp_write(tp, MII_TG3_DSP_EXP75, phy);
+
+	phy = ((otp & TG3_OTP_10BTAMP_MASK) >> TG3_OTP_10BTAMP_SHIFT);
+	tg3_phydsp_write(tp, MII_TG3_DSP_EXP96, phy);
+
+	phy = ((otp & TG3_OTP_ROFF_MASK) >> TG3_OTP_ROFF_SHIFT) |
+	      ((otp & TG3_OTP_RCOFF_MASK) >> TG3_OTP_RCOFF_SHIFT);
+	tg3_phydsp_write(tp, MII_TG3_DSP_EXP97, phy);
+
+	/* Turn off SM_DSP clock. */
+	phy = MII_TG3_AUXCTL_SHDWSEL_AUXCTL |
+	      MII_TG3_AUXCTL_ACTL_TX_6DB;
+	tg3_writephy(tp, MII_TG3_AUX_CTRL, phy);
+}
+
 static int tg3_wait_macro_done(struct tg3 *tp)
 {
 	int limit = 100;
@@ -1073,6 +1122,7 @@ static void tg3_link_report(struct tg3 *);
  */
 static int tg3_phy_reset(struct tg3 *tp)
 {
+	u32 cpmuctrl;
 	u32 phy_status;
 	int err;
 
@@ -1102,10 +1152,28 @@ static int tg3_phy_reset(struct tg3 *tp)
 		goto out;
 	}
 
+	cpmuctrl = 0;
+	if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5784 &&
+	    GET_CHIP_REV(tp->pci_chip_rev_id) != CHIPREV_5784_AX) {
+		cpmuctrl = tr32(TG3_CPMU_CTRL);
+		if (cpmuctrl & CPMU_CTRL_GPHY_10MB_RXONLY)
+			tw32(TG3_CPMU_CTRL,
+			     cpmuctrl & ~CPMU_CTRL_GPHY_10MB_RXONLY);
+	}
+
 	err = tg3_bmcr_reset(tp);
 	if (err)
 		return err;
 
+	if (cpmuctrl & CPMU_CTRL_GPHY_10MB_RXONLY) {
+		u32 phy;
+
+		phy = MII_TG3_DSP_EXP8_AEDW | MII_TG3_DSP_EXP8_REJ2MHz;
+		tg3_phydsp_write(tp, MII_TG3_DSP_EXP8, phy);
+
+		tw32(TG3_CPMU_CTRL, cpmuctrl);
+	}
+
 	if (tp->tg3_flags3 & TG3_FLG3_5761_5784_AX_FIXES) {
 		u32 val;
 
@@ -1124,6 +1192,8 @@ static int tg3_phy_reset(struct tg3 *tp)
 			     MII_TG3_MISC_SHDW_APD_WKTM_84MS);
 	}
 
+	tg3_phy_apply_otp(tp);
+
 out:
 	if (tp->tg3_flags2 & TG3_FLG2_PHY_ADC_BUG) {
 		tg3_writephy(tp, MII_TG3_AUX_CTRL, 0x0c00);
@@ -9464,7 +9534,8 @@ static int tg3_test_loopback(struct tg3 *tp)
 	if (err)
 		return TG3_LOOPBACK_FAILED;
 
-	if (tp->tg3_flags3 & TG3_FLG3_5761_5784_AX_FIXES) {
+	if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5784 ||
+	    GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5761) {
 		int i;
 		u32 status;
 
@@ -9481,17 +9552,23 @@ static int tg3_test_loopback(struct tg3 *tp)
 		if (status != CPMU_MUTEX_GNT_DRIVER)
 			return TG3_LOOPBACK_FAILED;
 
-		/* Turn off power management based on link speed. */
+		/* Turn off link-based power management. */
 		cpmuctrl = tr32(TG3_CPMU_CTRL);
-		tw32(TG3_CPMU_CTRL,
-		     cpmuctrl & ~(CPMU_CTRL_LINK_SPEED_MODE |
-				  CPMU_CTRL_LINK_AWARE_MODE));
+		if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5784 ||
+		    GET_CHIP_REV(tp->pci_chip_rev_id) == CHIPREV_5761_AX)
+			tw32(TG3_CPMU_CTRL,
+			     cpmuctrl & ~(CPMU_CTRL_LINK_SPEED_MODE |
+					  CPMU_CTRL_LINK_AWARE_MODE));
+		else
+			tw32(TG3_CPMU_CTRL,
+			     cpmuctrl & ~CPMU_CTRL_LINK_AWARE_MODE);
 	}
 
 	if (tg3_run_loopback(tp, TG3_MAC_LOOPBACK))
 		err |= TG3_MAC_LOOPBACK_FAILED;
 
-	if (tp->tg3_flags3 & TG3_FLG3_5761_5784_AX_FIXES) {
+	if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5784 ||
+	    GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5761) {
 		tw32(TG3_CPMU_CTRL, cpmuctrl);
 
 		/* Release the mutex */
@@ -10724,9 +10801,8 @@ static void __devinit tg3_get_eeprom_hw_cfg(struct tg3 *tp)
 		    tp->pdev->subsystem_vendor == PCI_VENDOR_ID_DELL)
 			tp->led_ctrl = LED_CTRL_MODE_PHY_2;
 
-		if (tp->pci_chip_rev_id == CHIPREV_ID_5784_A0 ||
-		    tp->pci_chip_rev_id == CHIPREV_ID_5784_A1)
-			tp->led_ctrl = LED_CTRL_MODE_MAC;
+		if (GET_CHIP_REV(tp->pci_chip_rev_id) == CHIPREV_5784_AX)
+			tp->led_ctrl = LED_CTRL_MODE_PHY_1;
 
 		if (nic_cfg & NIC_SRAM_DATA_CFG_EEPROM_WP) {
 			tp->tg3_flags |= TG3_FLAG_EEPROM_WRITE_PROT;
@@ -10773,6 +10849,55 @@ static void __devinit tg3_get_eeprom_hw_cfg(struct tg3 *tp)
 	}
 }
 
+static int __devinit tg3_issue_otp_command(struct tg3 *tp, u32 cmd)
+{
+	int i;
+	u32 val;
+
+	tw32(OTP_CTRL, cmd | OTP_CTRL_OTP_CMD_START);
+	tw32(OTP_CTRL, cmd);
+
+	/* Wait for up to 1 ms for command to execute. */
+	for (i = 0; i < 100; i++) {
+		val = tr32(OTP_STATUS);
+		if (val & OTP_STATUS_CMD_DONE)
+			break;
+		udelay(10);
+	}
+
+	return (val & OTP_STATUS_CMD_DONE) ? 0 : -EBUSY;
+}
+
+/* Read the gphy configuration from the OTP region of the chip.  The gphy
+ * configuration is a 32-bit value that straddles the alignment boundary.
+ * We do two 32-bit reads and then shift and merge the results.
+ */
+static u32 __devinit tg3_read_otp_phycfg(struct tg3 *tp)
+{
+	u32 bhalf_otp, thalf_otp;
+
+	tw32(OTP_MODE, OTP_MODE_OTP_THRU_GRC);
+
+	if (tg3_issue_otp_command(tp, OTP_CTRL_OTP_CMD_INIT))
+		return 0;
+
+	tw32(OTP_ADDRESS, OTP_ADDRESS_MAGIC1);
+
+	if (tg3_issue_otp_command(tp, OTP_CTRL_OTP_CMD_READ))
+		return 0;
+
+	thalf_otp = tr32(OTP_READ_DATA);
+
+	tw32(OTP_ADDRESS, OTP_ADDRESS_MAGIC2);
+
+	if (tg3_issue_otp_command(tp, OTP_CTRL_OTP_CMD_READ))
+		return 0;
+
+	bhalf_otp = tr32(OTP_READ_DATA);
+
+	return ((thalf_otp & 0x0000ffff) << 16) | (bhalf_otp >> 16);
+}
+
 static int __devinit tg3_phy_probe(struct tg3 *tp)
 {
 	u32 hw_phy_id_1, hw_phy_id_2;
@@ -11586,6 +11711,13 @@ static int __devinit tg3_get_invariants(struct tg3 *tp)
 			tp->tg3_flags2 |= TG3_FLG2_PHY_BER_BUG;
 	}
 
+	if (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5784 &&
+	    GET_CHIP_REV(tp->pci_chip_rev_id) != CHIPREV_5784_AX) {
+		tp->phy_otp = tg3_read_otp_phycfg(tp);
+		if (tp->phy_otp == 0)
+			tp->phy_otp = TG3_OTP_DEFAULT;
+	}
+
 	tp->coalesce_mode = 0;
 	if (GET_CHIP_REV(tp->pci_chip_rev_id) != CHIPREV_5700_AX &&
 	    GET_CHIP_REV(tp->pci_chip_rev_id) != CHIPREV_5700_BX)