This patch adds a PHY Abstraction Layer to the Linux Kernel, enabling

ethernet drivers to remain as ignorant as is reasonable of the connected
PHY's design and operation details.

Signed-off-by: Andy Fleming <afleming@freescale.com>
Signed-off-by: Jeff Garzik <jgarzik@pobox.com>

1 files changed, 179 insertions, 0 deletions

diff --git a/drivers/net/phy/lxt.c b/drivers/net/phy/lxt.c
new file mode 100644
index 000000000000..4c840448ec86
--- /dev/null
+++ b/drivers/net/phy/lxt.c
@@ -0,0 +1,179 @@
+/*
+ * drivers/net/phy/lxt.c
+ *
+ * Driver for Intel LXT PHYs
+ *
+ * Author: Andy Fleming
+ *
+ * Copyright (c) 2004 Freescale Semiconductor, Inc.
+ *
+ * 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/config.h>
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/unistd.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/phy.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+
+/* The Level one LXT970 is used by many boards                               */
+
+#define MII_LXT970_IER       17  /* Interrupt Enable Register */
+
+#define MII_LXT970_IER_IEN      0x0002
+
+#define MII_LXT970_ISR       18  /* Interrupt Status Register */
+
+#define MII_LXT970_CONFIG    19  /* Configuration Register    */
+
+/* ------------------------------------------------------------------------- */
+/* The Level one LXT971 is used on some of my custom boards                  */
+
+/* register definitions for the 971 */
+#define MII_LXT971_IER          18  /* Interrupt Enable Register */
+#define MII_LXT971_IER_IEN      0x00f2
+
+#define MII_LXT971_ISR          19  /* Interrupt Status Register */
+
+
+MODULE_DESCRIPTION("Intel LXT PHY driver");
+MODULE_AUTHOR("Andy Fleming");
+MODULE_LICENSE("GPL");
+
+static int lxt970_ack_interrupt(struct phy_device *phydev)
+{
+        int err;
+
+        err = phy_read(phydev, MII_BMSR);
+
+        if (err < 0)
+                return err;
+
+        err = phy_read(phydev, MII_LXT970_ISR);
+
+        if (err < 0)
+                return err;
+
+        return 0;
+}
+
+static int lxt970_config_intr(struct phy_device *phydev)
+{
+        int err;
+
+        if(phydev->interrupts == PHY_INTERRUPT_ENABLED)
+                err = phy_write(phydev, MII_LXT970_IER, MII_LXT970_IER_IEN);
+        else
+                err = phy_write(phydev, MII_LXT970_IER, 0);
+
+        return err;
+}
+
+static int lxt970_config_init(struct phy_device *phydev)
+{
+        int err;
+
+        err = phy_write(phydev, MII_LXT970_CONFIG, 0);
+
+        return err;
+}
+
+
+static int lxt971_ack_interrupt(struct phy_device *phydev)
+{
+        int err = phy_read(phydev, MII_LXT971_ISR);
+
+        if (err < 0)
+                return err;
+
+        return 0;
+}
+
+static int lxt971_config_intr(struct phy_device *phydev)
+{
+        int err;
+
+        if(phydev->interrupts == PHY_INTERRUPT_ENABLED)
+                err = phy_write(phydev, MII_LXT971_IER, MII_LXT971_IER_IEN);
+        else
+                err = phy_write(phydev, MII_LXT971_IER, 0);
+
+        return err;
+}
+
+static struct phy_driver lxt970_driver = {
+        .phy_id         = 0x07810000,
+        .name           = "LXT970",
+        .phy_id_mask    = 0x0fffffff,
+        .features       = PHY_BASIC_FEATURES,
+        .flags          = PHY_HAS_INTERRUPT,
+        .config_init    = lxt970_config_init,
+        .config_aneg    = genphy_config_aneg,
+        .read_status    = genphy_read_status,
+        .ack_interrupt  = lxt970_ack_interrupt,
+        .config_intr    = lxt970_config_intr,
+        .driver         = { .owner = THIS_MODULE,},
+};
+
+static struct phy_driver lxt971_driver = {
+        .phy_id         = 0x0001378e,
+        .name           = "LXT971",
+        .phy_id_mask    = 0x0fffffff,
+        .features       = PHY_BASIC_FEATURES,
+        .flags          = PHY_HAS_INTERRUPT,
+        .config_aneg    = genphy_config_aneg,
+        .read_status    = genphy_read_status,
+        .ack_interrupt  = lxt971_ack_interrupt,
+        .config_intr    = lxt971_config_intr,
+        .driver         = { .owner = THIS_MODULE,},
+};
+
+static int __init lxt_init(void)
+{
+        int ret;
+
+        ret = phy_driver_register(&lxt970_driver);
+        if (ret)
+                goto err1;
+
+        ret = phy_driver_register(&lxt971_driver);
+        if (ret)
+                goto err2;
+        return 0;
+
+ err2:  
+        phy_driver_unregister(&lxt970_driver);
+ err1:
+        return ret;
+}
+
+static void __exit lxt_exit(void)
+{
+        phy_driver_unregister(&lxt970_driver);
+        phy_driver_unregister(&lxt971_driver);
+}
+
+module_init(lxt_init);
+module_exit(lxt_exit);