broadcom: Add AC131 phy support

This patch adds support for the AC131 fast ethernet transceiver.

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

1 files changed, 158 insertions, 0 deletions

diff --git a/drivers/net/phy/broadcom.c b/drivers/net/phy/broadcom.c
index dec4dec23b6..3262a2474b0 100644
--- a/drivers/net/phy/broadcom.c
+++ b/drivers/net/phy/broadcom.c
@@ -142,6 +142,35 @@
 #define PHY_BCM_FLAGS_MODE_1000BX       0x00000002
 #define PHY_BCM_FLAGS_MODE_COPPER       0x00000001
 
+
+/*****************************************************************************/
+/* Fast Ethernet Transceiver definitions. */
+/*****************************************************************************/
+
+#define MII_BRCM_FET_INTREG             0x1a    /* Interrupt register */
+#define MII_BRCM_FET_IR_MASK            0x0100  /* Mask all interrupts */
+#define MII_BRCM_FET_IR_LINK_EN         0x0200  /* Link status change enable */
+#define MII_BRCM_FET_IR_SPEED_EN        0x0400  /* Link speed change enable */
+#define MII_BRCM_FET_IR_DUPLEX_EN       0x0800  /* Duplex mode change enable */
+#define MII_BRCM_FET_IR_ENABLE          0x4000  /* Interrupt enable */
+
+#define MII_BRCM_FET_BRCMTEST           0x1f    /* Brcm test register */
+#define MII_BRCM_FET_BT_SRE             0x0080  /* Shadow register enable */
+
+
+/*** Shadow register definitions ***/
+
+#define MII_BRCM_FET_SHDW_MISCCTRL      0x10    /* Shadow misc ctrl */
+#define MII_BRCM_FET_SHDW_MC_FAME       0x4000  /* Force Auto MDIX enable */
+
+#define MII_BRCM_FET_SHDW_AUXMODE4      0x1a    /* Auxiliary mode 4 */
+#define MII_BRCM_FET_SHDW_AM4_LED_MASK  0x0003
+#define MII_BRCM_FET_SHDW_AM4_LED_MODE1 0x0001
+
+#define MII_BRCM_FET_SHDW_AUXSTAT2      0x1b    /* Auxiliary status 2 */
+#define MII_BRCM_FET_SHDW_AS2_APDE      0x0020  /* Auto power down enable */
+
+
 MODULE_DESCRIPTION("Broadcom PHY driver");
 MODULE_AUTHOR("Maciej W. Rozycki");
 MODULE_LICENSE("GPL");
@@ -436,6 +465,114 @@ static int bcm5481_config_aneg(struct phy_device *phydev)
         return ret;
 }
 
+static int brcm_phy_setbits(struct phy_device *phydev, int reg, int set)
+{
+        int val;
+
+        val = phy_read(phydev, reg);
+        if (val < 0)
+                return val;
+
+        return phy_write(phydev, reg, val | set);
+}
+
+static int brcm_fet_config_init(struct phy_device *phydev)
+{
+        int reg, err, err2, brcmtest;
+
+        /* Reset the PHY to bring it to a known state. */
+        err = phy_write(phydev, MII_BMCR, BMCR_RESET);
+        if (err < 0)
+                return err;
+
+        reg = phy_read(phydev, MII_BRCM_FET_INTREG);
+        if (reg < 0)
+                return reg;
+
+        /* Unmask events we are interested in and mask interrupts globally. */
+        reg = MII_BRCM_FET_IR_DUPLEX_EN |
+              MII_BRCM_FET_IR_SPEED_EN |
+              MII_BRCM_FET_IR_LINK_EN |
+              MII_BRCM_FET_IR_ENABLE |
+              MII_BRCM_FET_IR_MASK;
+
+        err = phy_write(phydev, MII_BRCM_FET_INTREG, reg);
+        if (err < 0)
+                return err;
+
+        /* Enable shadow register access */
+        brcmtest = phy_read(phydev, MII_BRCM_FET_BRCMTEST);
+        if (brcmtest < 0)
+                return brcmtest;
+
+        reg = brcmtest | MII_BRCM_FET_BT_SRE;
+
+        err = phy_write(phydev, MII_BRCM_FET_BRCMTEST, reg);
+        if (err < 0)
+                return err;
+
+        /* Set the LED mode */
+        reg = phy_read(phydev, MII_BRCM_FET_SHDW_AUXMODE4);
+        if (reg < 0) {
+                err = reg;
+                goto done;
+        }
+
+        reg &= ~MII_BRCM_FET_SHDW_AM4_LED_MASK;
+        reg |= MII_BRCM_FET_SHDW_AM4_LED_MODE1;
+
+        err = phy_write(phydev, MII_BRCM_FET_SHDW_AUXMODE4, reg);
+        if (err < 0)
+                goto done;
+
+        /* Enable auto MDIX */
+        err = brcm_phy_setbits(phydev, MII_BRCM_FET_SHDW_MISCCTRL,
+                                       MII_BRCM_FET_SHDW_MC_FAME);
+        if (err < 0)
+                goto done;
+
+        /* Enable auto power down */
+        err = brcm_phy_setbits(phydev, MII_BRCM_FET_SHDW_AUXSTAT2,
+                                       MII_BRCM_FET_SHDW_AS2_APDE);
+
+done:
+        /* Disable shadow register access */
+        err2 = phy_write(phydev, MII_BRCM_FET_BRCMTEST, brcmtest);
+        if (!err)
+                err = err2;
+
+        return err;
+}
+
+static int brcm_fet_ack_interrupt(struct phy_device *phydev)
+{
+        int reg;
+
+        /* Clear pending interrupts.  */
+        reg = phy_read(phydev, MII_BRCM_FET_INTREG);
+        if (reg < 0)
+                return reg;
+
+        return 0;
+}
+
+static int brcm_fet_config_intr(struct phy_device *phydev)
+{
+        int reg, err;
+
+        reg = phy_read(phydev, MII_BRCM_FET_INTREG);
+        if (reg < 0)
+                return reg;
+
+        if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
+                reg &= ~MII_BRCM_FET_IR_MASK;
+        else
+                reg |= MII_BRCM_FET_IR_MASK;
+
+        err = phy_write(phydev, MII_BRCM_FET_INTREG, reg);
+        return err;
+}
+
 static struct phy_driver bcm5411_driver = {
         .phy_id         = 0x00206070,
         .phy_id_mask    = 0xfffffff0,
@@ -571,6 +708,21 @@ static struct phy_driver bcm57780_driver = {
         .driver         = { .owner = THIS_MODULE },
 };
 
+static struct phy_driver bcmac131_driver = {
+        .phy_id         = 0x0143bc70,
+        .phy_id_mask    = 0xfffffff0,
+        .name           = "Broadcom BCMAC131",
+        .features       = PHY_BASIC_FEATURES |
+                          SUPPORTED_Pause | SUPPORTED_Asym_Pause,
+        .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
+        .config_init    = brcm_fet_config_init,
+        .config_aneg    = genphy_config_aneg,
+        .read_status    = genphy_read_status,
+        .ack_interrupt  = brcm_fet_ack_interrupt,
+        .config_intr    = brcm_fet_config_intr,
+        .driver         = { .owner = THIS_MODULE },
+};
+
 static int __init broadcom_init(void)
 {
         int ret;
@@ -602,8 +754,13 @@ static int __init broadcom_init(void)
         ret = phy_driver_register(&bcm57780_driver);
         if (ret)
                 goto out_57780;
+        ret = phy_driver_register(&bcmac131_driver);
+        if (ret)
+                goto out_ac131;
         return ret;
 
+out_ac131:
+        phy_driver_unregister(&bcm57780_driver);
 out_57780:
         phy_driver_unregister(&bcm50610m_driver);
 out_50610m:
@@ -626,6 +783,7 @@ out_5411:
 
 static void __exit broadcom_exit(void)
 {
+        phy_driver_unregister(&bcmac131_driver);
         phy_driver_unregister(&bcm57780_driver);
         phy_driver_unregister(&bcm50610m_driver);
         phy_driver_unregister(&bcm50610_driver);