[PATCH] 2.6.18: sb1250-mac: Broadcom PHY support

 This patch adds support for interrupt-driven operation of the Broadcom
Gigabit Ethernet PHYs.  I have included device IDs for the parts used on
Broadcom SiByte evaluation boards; more can be added as a need arises.
They are apparently generally software-compatible with one another.

Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>

patch-mips-2.6.18-20060920-broadcom-phy-15
Signed-off-by: Jeff Garzik <jeff@garzik.org>

3 files changed, 182 insertions, 0 deletions

diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index ecb61f876f27..f994f129f3d8 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -56,6 +56,12 @@ config SMSC_PHY
         ---help---
           Currently supports the LAN83C185 PHY
 
+config BROADCOM_PHY
+        tristate "Drivers for Broadcom PHYs"
+        depends on PHYLIB
+        ---help---
+          Currently supports the BCM5411, BCM5421 and BCM5461 PHYs.
+
 config FIXED_PHY
         tristate "Drivers for PHY emulation on fixed speed/link"
         depends on PHYLIB
diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
index 320f8323123f..bcd1efbd2a18 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -10,4 +10,5 @@ obj-$(CONFIG_LXT_PHY)		+= lxt.o
 obj-$(CONFIG_QSEMI_PHY)         += qsemi.o
 obj-$(CONFIG_SMSC_PHY)          += smsc.o
 obj-$(CONFIG_VITESSE_PHY)       += vitesse.o
+obj-$(CONFIG_BROADCOM_PHY)      += broadcom.o
 obj-$(CONFIG_FIXED_PHY)         += fixed.o
diff --git a/drivers/net/phy/broadcom.c b/drivers/net/phy/broadcom.c
new file mode 100644
index 000000000000..29666c85ed55
--- /dev/null
+++ b/drivers/net/phy/broadcom.c
@@ -0,0 +1,175 @@
+/*
+ *      drivers/net/phy/broadcom.c
+ *
+ *      Broadcom BCM5411, BCM5421 and BCM5461 Gigabit Ethernet
+ *      transceivers.
+ *
+ *      Copyright (c) 2006  Maciej W. Rozycki
+ *
+ *      Inspired by code written by Amy Fong.
+ *
+ *      This program is free software; you can redistribute it and/or
+ *      modify it under the terms of the GNU General Public License
+ *      as published by the Free Software Foundation; either version
+ *      2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/module.h>
+#include <linux/phy.h>
+
+#define MII_BCM54XX_ECR         0x10    /* BCM54xx extended control register */
+#define MII_BCM54XX_ECR_IM      0x1000  /* Interrupt mask */
+#define MII_BCM54XX_ECR_IF      0x0800  /* Interrupt force */
+
+#define MII_BCM54XX_ESR         0x11    /* BCM54xx extended status register */
+#define MII_BCM54XX_ESR_IS      0x1000  /* Interrupt status */
+
+#define MII_BCM54XX_ISR         0x1a    /* BCM54xx interrupt status register */
+#define MII_BCM54XX_IMR         0x1b    /* BCM54xx interrupt mask register */
+#define MII_BCM54XX_INT_CRCERR  0x0001  /* CRC error */
+#define MII_BCM54XX_INT_LINK    0x0002  /* Link status changed */
+#define MII_BCM54XX_INT_SPEED   0x0004  /* Link speed change */
+#define MII_BCM54XX_INT_DUPLEX  0x0008  /* Duplex mode changed */
+#define MII_BCM54XX_INT_LRS     0x0010  /* Local receiver status changed */
+#define MII_BCM54XX_INT_RRS     0x0020  /* Remote receiver status changed */
+#define MII_BCM54XX_INT_SSERR   0x0040  /* Scrambler synchronization error */
+#define MII_BCM54XX_INT_UHCD    0x0080  /* Unsupported HCD negotiated */
+#define MII_BCM54XX_INT_NHCD    0x0100  /* No HCD */
+#define MII_BCM54XX_INT_NHCDL   0x0200  /* No HCD link */
+#define MII_BCM54XX_INT_ANPR    0x0400  /* Auto-negotiation page received */
+#define MII_BCM54XX_INT_LC      0x0800  /* All counters below 128 */
+#define MII_BCM54XX_INT_HC      0x1000  /* Counter above 32768 */
+#define MII_BCM54XX_INT_MDIX    0x2000  /* MDIX status change */
+#define MII_BCM54XX_INT_PSERR   0x4000  /* Pair swap error */
+
+MODULE_DESCRIPTION("Broadcom PHY driver");
+MODULE_AUTHOR("Maciej W. Rozycki");
+MODULE_LICENSE("GPL");
+
+static int bcm54xx_config_init(struct phy_device *phydev)
+{
+        int reg, err;
+
+        reg = phy_read(phydev, MII_BCM54XX_ECR);
+        if (reg < 0)
+                return reg;
+
+        /* Mask interrupts globally.  */
+        reg |= MII_BCM54XX_ECR_IM;
+        err = phy_write(phydev, MII_BCM54XX_ECR, reg);
+        if (err < 0)
+                return err;
+
+        /* Unmask events we are interested in.  */
+        reg = ~(MII_BCM54XX_INT_DUPLEX |
+                MII_BCM54XX_INT_SPEED |
+                MII_BCM54XX_INT_LINK);
+        err = phy_write(phydev, MII_BCM54XX_IMR, reg);
+        if (err < 0)
+                return err;
+        return 0;
+}
+
+static int bcm54xx_ack_interrupt(struct phy_device *phydev)
+{
+        int reg;
+
+        /* Clear pending interrupts.  */
+        reg = phy_read(phydev, MII_BCM54XX_ISR);
+        if (reg < 0)
+                return reg;
+
+        return 0;
+}
+
+static int bcm54xx_config_intr(struct phy_device *phydev)
+{
+        int reg, err;
+
+        reg = phy_read(phydev, MII_BCM54XX_ECR);
+        if (reg < 0)
+                return reg;
+
+        if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
+                reg &= ~MII_BCM54XX_ECR_IM;
+        else
+                reg |= MII_BCM54XX_ECR_IM;
+
+        err = phy_write(phydev, MII_BCM54XX_ECR, reg);
+        return err;
+}
+
+static struct phy_driver bcm5411_driver = {
+        .phy_id         = 0x00206070,
+        .phy_id_mask    = 0xfffffff0,
+        .name           = "Broadcom BCM5411",
+        .features       = PHY_GBIT_FEATURES,
+        .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
+        .config_init    = bcm54xx_config_init,
+        .config_aneg    = genphy_config_aneg,
+        .read_status    = genphy_read_status,
+        .ack_interrupt  = bcm54xx_ack_interrupt,
+        .config_intr    = bcm54xx_config_intr,
+        .driver         = { .owner = THIS_MODULE },
+};
+
+static struct phy_driver bcm5421_driver = {
+        .phy_id         = 0x002060e0,
+        .phy_id_mask    = 0xfffffff0,
+        .name           = "Broadcom BCM5421",
+        .features       = PHY_GBIT_FEATURES,
+        .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
+        .config_init    = bcm54xx_config_init,
+        .config_aneg    = genphy_config_aneg,
+        .read_status    = genphy_read_status,
+        .ack_interrupt  = bcm54xx_ack_interrupt,
+        .config_intr    = bcm54xx_config_intr,
+        .driver         = { .owner = THIS_MODULE },
+};
+
+static struct phy_driver bcm5461_driver = {
+        .phy_id         = 0x002060c0,
+        .phy_id_mask    = 0xfffffff0,
+        .name           = "Broadcom BCM5461",
+        .features       = PHY_GBIT_FEATURES,
+        .flags          = PHY_HAS_MAGICANEG | PHY_HAS_INTERRUPT,
+        .config_init    = bcm54xx_config_init,
+        .config_aneg    = genphy_config_aneg,
+        .read_status    = genphy_read_status,
+        .ack_interrupt  = bcm54xx_ack_interrupt,
+        .config_intr    = bcm54xx_config_intr,
+        .driver         = { .owner = THIS_MODULE },
+};
+
+static int __init broadcom_init(void)
+{
+        int ret;
+
+        ret = phy_driver_register(&bcm5411_driver);
+        if (ret)
+                goto out_5411;
+        ret = phy_driver_register(&bcm5421_driver);
+        if (ret)
+                goto out_5421;
+        ret = phy_driver_register(&bcm5461_driver);
+        if (ret)
+                goto out_5461;
+        return ret;
+
+out_5461:
+        phy_driver_unregister(&bcm5421_driver);
+out_5421:
+        phy_driver_unregister(&bcm5411_driver);
+out_5411:
+        return ret;
+}
+
+static void __exit broadcom_exit(void)
+{
+        phy_driver_unregister(&bcm5461_driver);
+        phy_driver_unregister(&bcm5421_driver);
+        phy_driver_unregister(&bcm5411_driver);
+}
+
+module_init(broadcom_init);
+module_exit(broadcom_exit);