tg3: Add EEE support
Matt Carlson [Thu, 14 Oct 2010 10:37:41 +0000 (10:37 +0000)]
This patch adds Energy Efficient Ethernet (EEE) support for the 5718
device ID and the 57765 B0 asic revision.

Signed-off-by: Matt Carlson <mcarlson@broadcom.com>
Reviewed-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/tg3.c
drivers/net/tg3.h

index afcc593..f2d96dd 100644 (file)
@@ -1584,6 +1584,17 @@ static void tg3_phy_fini(struct tg3 *tp)
        }
 }
 
+static int tg3_phydsp_read(struct tg3 *tp, u32 reg, u32 *val)
+{
+       int err;
+
+       err = tg3_writephy(tp, MII_TG3_DSP_ADDRESS, reg);
+       if (!err)
+               err = tg3_readphy(tp, MII_TG3_DSP_RW_PORT, val);
+
+       return err;
+}
+
 static int tg3_phydsp_write(struct tg3 *tp, u32 reg, u32 val)
 {
        int err;
@@ -1747,6 +1758,42 @@ static void tg3_phy_apply_otp(struct tg3 *tp)
        tg3_writephy(tp, MII_TG3_AUX_CTRL, phy);
 }
 
+static void tg3_phy_eee_adjust(struct tg3 *tp, u32 current_link_up)
+{
+       u32 val;
+
+       if (!(tp->phy_flags & TG3_PHYFLG_EEE_CAP))
+               return;
+
+       tp->setlpicnt = 0;
+
+       if (tp->link_config.autoneg == AUTONEG_ENABLE &&
+           current_link_up == 1 &&
+           (tp->link_config.active_speed == SPEED_1000 ||
+            (tp->link_config.active_speed == SPEED_100 &&
+             tp->link_config.active_duplex == DUPLEX_FULL))) {
+               u32 eeectl;
+
+               if (tp->link_config.active_speed == SPEED_1000)
+                       eeectl = TG3_CPMU_EEE_CTRL_EXIT_16_5_US;
+               else
+                       eeectl = TG3_CPMU_EEE_CTRL_EXIT_36_US;
+
+               tw32(TG3_CPMU_EEE_CTRL, eeectl);
+
+               tg3_phy_cl45_read(tp, 0x7, TG3_CL45_D7_EEERES_STAT, &val);
+
+               if (val == TG3_CL45_D7_EEERES_STAT_LP_1000T ||
+                   val == TG3_CL45_D7_EEERES_STAT_LP_100TX)
+                       tp->setlpicnt = 2;
+       }
+
+       if (!tp->setlpicnt) {
+               val = tr32(TG3_CPMU_EEE_MODE);
+               tw32(TG3_CPMU_EEE_MODE, val & ~TG3_CPMU_EEEMD_LPI_ENABLE);
+       }
+}
+
 static int tg3_wait_macro_done(struct tg3 *tp)
 {
        int limit = 100;
@@ -2921,6 +2968,44 @@ static void tg3_phy_copper_begin(struct tg3 *tp)
                tg3_writephy(tp, MII_TG3_CTRL, new_adv);
        }
 
+       if (tp->phy_flags & TG3_PHYFLG_EEE_CAP) {
+               u32 val = 0;
+
+               tw32(TG3_CPMU_EEE_MODE,
+                    tr32(TG3_CPMU_EEE_MODE) & ~TG3_CPMU_EEEMD_LPI_ENABLE);
+
+               /* Enable SM_DSP clock and tx 6dB coding. */
+               val = MII_TG3_AUXCTL_SHDWSEL_AUXCTL |
+                     MII_TG3_AUXCTL_ACTL_SMDSP_ENA |
+                     MII_TG3_AUXCTL_ACTL_TX_6DB;
+               tg3_writephy(tp, MII_TG3_AUX_CTRL, val);
+
+               if ((GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_5717 ||
+                    GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57765) &&
+                   !tg3_phydsp_read(tp, MII_TG3_DSP_CH34TP2, &val))
+                       tg3_phydsp_write(tp, MII_TG3_DSP_CH34TP2,
+                                        val | MII_TG3_DSP_CH34TP2_HIBW01);
+
+               if (tp->link_config.autoneg == AUTONEG_ENABLE) {
+                       /* Advertise 100-BaseTX EEE ability */
+                       if (tp->link_config.advertising &
+                           (ADVERTISED_100baseT_Half |
+                            ADVERTISED_100baseT_Full))
+                               val |= TG3_CL45_D7_EEEADV_CAP_100TX;
+                       /* Advertise 1000-BaseT EEE ability */
+                       if (tp->link_config.advertising &
+                           (ADVERTISED_1000baseT_Half |
+                            ADVERTISED_1000baseT_Full))
+                               val |= TG3_CL45_D7_EEEADV_CAP_1000T;
+               }
+               tg3_phy_cl45_write(tp, 0x7, TG3_CL45_D7_EEEADV_CAP, val);
+
+               /* Turn off SM_DSP clock. */
+               val = MII_TG3_AUXCTL_SHDWSEL_AUXCTL |
+                     MII_TG3_AUXCTL_ACTL_TX_6DB;
+               tg3_writephy(tp, MII_TG3_AUX_CTRL, val);
+       }
+
        if (tp->link_config.autoneg == AUTONEG_DISABLE &&
            tp->link_config.speed != SPEED_INVALID) {
                u32 bmcr, orig_bmcr;
@@ -3282,6 +3367,8 @@ relink:
        tw32_f(MAC_MODE, tp->mac_mode);
        udelay(40);
 
+       tg3_phy_eee_adjust(tp, current_link_up);
+
        if (tp->tg3_flags & TG3_FLAG_USE_LINKCHG_REG) {
                /* Polled via timer. */
                tw32_f(MAC_EVENT, 0);
@@ -7790,6 +7877,22 @@ static int tg3_reset_hw(struct tg3 *tp, int reset_phy)
                tw32(TG3_CPMU_LSPD_10MB_CLK, val);
        }
 
+       /* Enable MAC control of LPI */
+       if (tp->phy_flags & TG3_PHYFLG_EEE_CAP) {
+               tw32_f(TG3_CPMU_EEE_LNKIDL_CTRL,
+                      TG3_CPMU_EEE_LNKIDL_PCIE_NL0 |
+                      TG3_CPMU_EEE_LNKIDL_UART_IDL);
+
+               tw32_f(TG3_CPMU_EEE_CTRL,
+                      TG3_CPMU_EEE_CTRL_EXIT_20_1_US);
+
+               tw32_f(TG3_CPMU_EEE_MODE,
+                      TG3_CPMU_EEEMD_ERLY_L1_XIT_DET |
+                      TG3_CPMU_EEEMD_LPI_IN_TX |
+                      TG3_CPMU_EEEMD_LPI_IN_RX |
+                      TG3_CPMU_EEEMD_EEE_ENABLE);
+       }
+
        /* This works around an issue with Athlon chipsets on
         * B3 tigon3 silicon.  This bit has no effect on any
         * other revision.  But do not set this on PCI Express
@@ -8598,6 +8701,12 @@ static void tg3_timer(unsigned long __opaque)
                if (tp->tg3_flags2 & TG3_FLG2_5705_PLUS)
                        tg3_periodic_fetch_stats(tp);
 
+               if (tp->setlpicnt && !--tp->setlpicnt) {
+                       u32 val = tr32(TG3_CPMU_EEE_MODE);
+                       tw32(TG3_CPMU_EEE_MODE,
+                            val | TG3_CPMU_EEEMD_LPI_ENABLE);
+               }
+
                if (tp->tg3_flags & TG3_FLAG_USE_LINKCHG_REG) {
                        u32 mac_stat;
                        int phy_event;
@@ -12432,6 +12541,11 @@ static int __devinit tg3_phy_probe(struct tg3 *tp)
                }
        }
 
+       if (tp->pdev->device == TG3PCI_DEVICE_TIGON3_5718 ||
+           (GET_ASIC_REV(tp->pci_chip_rev_id) == ASIC_REV_57765 &&
+            tp->pci_chip_rev_id != CHIPREV_ID_57765_A0))
+               tp->phy_flags |= TG3_PHYFLG_EEE_CAP;
+
        if (!(tp->phy_flags & TG3_PHYFLG_ANY_SERDES) &&
            !(tp->tg3_flags3 & TG3_FLG3_ENABLE_APE) &&
            !(tp->tg3_flags & TG3_FLAG_ENABLE_ASF)) {
index 99fc306..8342190 100644 (file)
 #define  CPMU_MUTEX_GNT_DRIVER          0x00001000
 #define TG3_CPMU_PHY_STRAP             0x00003664
 #define TG3_CPMU_PHY_STRAP_IS_SERDES    0x00000020
-/* 0x3664 --> 0x3800 unused */
+/* 0x3664 --> 0x36b0 unused */
+
+#define TG3_CPMU_EEE_MODE              0x000036b0
+#define TG3_CPMU_EEEMD_ERLY_L1_XIT_DET  0x00000008
+#define TG3_CPMU_EEEMD_LPI_ENABLE       0x00000080
+#define TG3_CPMU_EEEMD_LPI_IN_TX        0x00000100
+#define TG3_CPMU_EEEMD_LPI_IN_RX        0x00000200
+#define TG3_CPMU_EEEMD_EEE_ENABLE       0x00100000
+/* 0x36b4 --> 0x36b8 unused */
+
+#define TG3_CPMU_EEE_LNKIDL_CTRL       0x000036bc
+#define  TG3_CPMU_EEE_LNKIDL_PCIE_NL0   0x01000000
+#define  TG3_CPMU_EEE_LNKIDL_UART_IDL   0x00000004
+/* 0x36c0 --> 0x36d0 unused */
+
+#define TG3_CPMU_EEE_CTRL              0x000036d0
+#define TG3_CPMU_EEE_CTRL_EXIT_16_5_US  0x0000019d
+#define TG3_CPMU_EEE_CTRL_EXIT_36_US    0x00000384
+#define TG3_CPMU_EEE_CTRL_EXIT_20_1_US  0x000001f8
+/* 0x36d4 --> 0x3800 unused */
 
 /* Mbuf cluster free registers */
 #define MBFREE_MODE                    0x00003800
 #define MII_TG3_DSP_TAP1               0x0001
 #define  MII_TG3_DSP_TAP1_AGCTGT_DFLT  0x0007
 #define MII_TG3_DSP_AADJ1CH0           0x001f
+#define MII_TG3_DSP_CH34TP2            0x4022
+#define MII_TG3_DSP_CH34TP2_HIBW01     0x0010
 #define MII_TG3_DSP_AADJ1CH3           0x601f
 #define  MII_TG3_DSP_AADJ1CH3_ADCCKADJ 0x0002
 #define MII_TG3_DSP_EXP1_INT_STAT      0x0f01
 #define MII_TG3_TEST1_TRIM_EN          0x0010
 #define MII_TG3_TEST1_CRC_EN           0x8000
 
+/* Clause 45 expansion registers */
+#define TG3_CL45_D7_EEEADV_CAP         0x003c
+#define TG3_CL45_D7_EEEADV_CAP_100TX   0x0002
+#define TG3_CL45_D7_EEEADV_CAP_1000T   0x0004
+#define TG3_CL45_D7_EEERES_STAT                0x803e
+#define TG3_CL45_D7_EEERES_STAT_LP_100TX       0x0002
+#define TG3_CL45_D7_EEERES_STAT_LP_1000T       0x0004
+
 
 /* Fast Ethernet Tranceiver definitions */
 #define MII_TG3_FET_PTEST              0x17
@@ -2992,9 +3021,11 @@ struct tg3 {
 #define TG3_PHYFLG_BER_BUG             0x00008000
 #define TG3_PHYFLG_SERDES_PREEMPHASIS  0x00010000
 #define TG3_PHYFLG_PARALLEL_DETECT     0x00020000
+#define TG3_PHYFLG_EEE_CAP             0x00040000
 
        u32                             led_ctrl;
        u32                             phy_otp;
+       u32                             setlpicnt;
 
 #define TG3_BPN_SIZE                   24
        char                            board_part_number[TG3_BPN_SIZE];