phy: add the ST ste10Xp PHYs

This patch adds the STMicroelectronics ste10xp PHY device driver.
It supports both the ste100p and the ste101p devices.

Suspend/resume alredy added.

Signed-off-by: Giuseppe Cavallaro <peppe.cavallaro@st.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 144 insertions, 0 deletions

diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index a1938e18cb62..0b368dc49aea 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -71,6 +71,12 @@ config NATIONAL_PHY
         ---help---
           Currently supports the DP83865 PHY.
 
+config STE10XP
+        depends on PHYLIB
+        tristate "Driver for STMicroelectronics STe10Xp PHYs"
+        ---help---
+          This is the driver for the STe100p and STe101p PHYs.
+
 config FIXED_PHY
         bool "Driver for MDIO Bus/PHY emulation with fixed speed/link PHYs"
         depends on PHYLIB=y
diff --git a/drivers/net/phy/Makefile b/drivers/net/phy/Makefile
index eba495453aef..67959c9d4ca5 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -17,3 +17,4 @@ obj-$(CONFIG_FIXED_PHY)		+= fixed.o
 obj-$(CONFIG_MDIO_BITBANG)      += mdio-bitbang.o
 obj-$(CONFIG_MDIO_GPIO)         += mdio-gpio.o
 obj-$(CONFIG_NATIONAL_PHY)      += national.o
+obj-$(CONFIG_STE10XP)           += ste10Xp.o
diff --git a/drivers/net/phy/ste10Xp.c b/drivers/net/phy/ste10Xp.c
new file mode 100644
index 000000000000..6bdb0d53aaf9
--- /dev/null
+++ b/drivers/net/phy/ste10Xp.c
@@ -0,0 +1,137 @@
+/*
+ * drivers/net/phy/ste10Xp.c
+ *
+ * Driver for STMicroelectronics STe10Xp PHYs
+ *
+ * Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
+ *
+ * Copyright (c) 2008 STMicroelectronics Limited
+ *
+ * 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/init.h>
+#include <linux/sched.h>
+#include <linux/kernel.h>
+#include <linux/moduleparam.h>
+#include <linux/interrupt.h>
+#include <linux/netdevice.h>
+#include <linux/ethtool.h>
+#include <linux/mii.h>
+#include <linux/phy.h>
+
+#define MII_XCIIS       0x11    /* Configuration Info IRQ & Status Reg */
+#define MII_XIE         0x12    /* Interrupt Enable Register */
+#define MII_XIE_DEFAULT_MASK 0x0070 /* ANE complete, Remote Fault, Link Down */
+
+#define STE101P_PHY_ID          0x00061c50
+#define STE100P_PHY_ID          0x1c040011
+
+static int ste10Xp_config_init(struct phy_device *phydev)
+{
+        int value, err;
+
+        /* Software Reset PHY */
+        value = phy_read(phydev, MII_BMCR);
+        if (value < 0)
+                return value;
+
+        value |= BMCR_RESET;
+        err = phy_write(phydev, MII_BMCR, value);
+        if (err < 0)
+                return err;
+
+        do {
+                value = phy_read(phydev, MII_BMCR);
+        } while (value & BMCR_RESET);
+
+        return 0;
+}
+
+static int ste10Xp_config_intr(struct phy_device *phydev)
+{
+        int err, value;
+
+        if (phydev->interrupts == PHY_INTERRUPT_ENABLED) {
+                /* Enable all STe101P interrupts (PR12) */
+                err = phy_write(phydev, MII_XIE, MII_XIE_DEFAULT_MASK);
+                /* clear any pending interrupts */
+                if (err == 0) {
+                        value = phy_read(phydev, MII_XCIIS);
+                        if (value < 0)
+                                err = value;
+                }
+        } else
+                err = phy_write(phydev, MII_XIE, 0);
+
+        return err;
+}
+
+static int ste10Xp_ack_interrupt(struct phy_device *phydev)
+{
+        int err = phy_read(phydev, MII_XCIIS);
+        if (err < 0)
+                return err;
+
+        return 0;
+}
+
+static struct phy_driver ste101p_pdriver = {
+        .phy_id = STE101P_PHY_ID,
+        .phy_id_mask = 0xfffffff0,
+        .name = "STe101p",
+        .features = PHY_BASIC_FEATURES | SUPPORTED_Pause,
+        .flags = PHY_HAS_INTERRUPT,
+        .config_init = ste10Xp_config_init,
+        .config_aneg = genphy_config_aneg,
+        .read_status = genphy_read_status,
+        .ack_interrupt = ste10Xp_ack_interrupt,
+        .config_intr = ste10Xp_config_intr,
+        .suspend = genphy_suspend,
+        .resume = genphy_resume,
+        .driver = {.owner = THIS_MODULE,}
+};
+
+static struct phy_driver ste100p_pdriver = {
+        .phy_id = STE100P_PHY_ID,
+        .phy_id_mask = 0xffffffff,
+        .name = "STe100p",
+        .features = PHY_BASIC_FEATURES | SUPPORTED_Pause,
+        .flags = PHY_HAS_INTERRUPT,
+        .config_init = ste10Xp_config_init,
+        .config_aneg = genphy_config_aneg,
+        .read_status = genphy_read_status,
+        .ack_interrupt = ste10Xp_ack_interrupt,
+        .config_intr = ste10Xp_config_intr,
+        .suspend = genphy_suspend,
+        .resume = genphy_resume,
+        .driver = {.owner = THIS_MODULE,}
+};
+
+static int __init ste10Xp_init(void)
+{
+        int retval;
+
+        retval = phy_driver_register(&ste100p_pdriver);
+        if (retval < 0)
+                return retval;
+        return phy_driver_register(&ste101p_pdriver);
+}
+
+static void __exit ste10Xp_exit(void)
+{
+        phy_driver_unregister(&ste100p_pdriver);
+        phy_driver_unregister(&ste101p_pdriver);
+}
+
+module_init(ste10Xp_init);
+module_exit(ste10Xp_exit);
+
+MODULE_DESCRIPTION("STMicroelectronics STe10Xp PHY driver");
+MODULE_AUTHOR("Giuseppe Cavallaro <peppe.cavallaro@st.com>");
+MODULE_LICENSE("GPL");