phy: add am79c874 PHY support
Heiko Schocher [Sun, 18 Mar 2012 11:03:05 +0000 (11:03 +0000)]
Signed-off-by: Heiko Schocher <hs@denx.de>
Signed-off-by: Anatolij Gustschin <agust@denx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/phy/Kconfig
drivers/net/phy/Makefile
drivers/net/phy/amd.c [new file with mode: 0644]

index fbdcdf8..0e01f4e 100644 (file)
@@ -15,6 +15,11 @@ if PHYLIB
 
 comment "MII PHY device drivers"
 
+config AMD_PHY
+       tristate "Drivers for the AMD PHYs"
+       ---help---
+         Currently supports the am79c874
+
 config MARVELL_PHY
        tristate "Drivers for Marvell PHYs"
        ---help---
index e15c83f..b7438b1 100644 (file)
@@ -24,3 +24,4 @@ obj-$(CONFIG_STE10XP)         += ste10Xp.o
 obj-$(CONFIG_MICREL_PHY)       += micrel.o
 obj-$(CONFIG_MDIO_OCTEON)      += mdio-octeon.o
 obj-$(CONFIG_MICREL_KS8995MA)  += spi_ks8995.o
+obj-$(CONFIG_AMD_PHY)          += amd.o
diff --git a/drivers/net/phy/amd.c b/drivers/net/phy/amd.c
new file mode 100644 (file)
index 0000000..cfabd5f
--- /dev/null
@@ -0,0 +1,102 @@
+/*
+ * Driver for AMD am79c PHYs
+ *
+ * Author: Heiko Schocher <hs@denx.de>
+ *
+ * Copyright (c) 2011 DENX Software Engineering GmbH
+ *
+ * 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/kernel.h>
+#include <linux/errno.h>
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/mii.h>
+#include <linux/phy.h>
+
+#define PHY_ID_AM79C874                0x0022561b
+
+#define MII_AM79C_IR           17      /* Interrupt Status/Control Register */
+#define MII_AM79C_IR_EN_LINK   0x0400  /* IR enable Linkstate */
+#define MII_AM79C_IR_EN_ANEG   0x0100  /* IR enable Aneg Complete */
+#define MII_AM79C_IR_IMASK_INIT        (MII_AM79C_IR_EN_LINK | MII_AM79C_IR_EN_ANEG)
+
+MODULE_DESCRIPTION("AMD PHY driver");
+MODULE_AUTHOR("Heiko Schocher <hs@denx.de>");
+MODULE_LICENSE("GPL");
+
+static int am79c_ack_interrupt(struct phy_device *phydev)
+{
+       int err;
+
+       err = phy_read(phydev, MII_BMSR);
+       if (err < 0)
+               return err;
+
+       err = phy_read(phydev, MII_AM79C_IR);
+       if (err < 0)
+               return err;
+
+       return 0;
+}
+
+static int am79c_config_init(struct phy_device *phydev)
+{
+       return 0;
+}
+
+static int am79c_config_intr(struct phy_device *phydev)
+{
+       int err;
+
+       if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
+               err = phy_write(phydev, MII_AM79C_IR, MII_AM79C_IR_IMASK_INIT);
+       else
+               err = phy_write(phydev, MII_AM79C_IR, 0);
+
+       return err;
+}
+
+static struct phy_driver am79c_driver = {
+       .phy_id         = PHY_ID_AM79C874,
+       .name           = "AM79C874",
+       .phy_id_mask    = 0xfffffff0,
+       .features       = PHY_BASIC_FEATURES,
+       .flags          = PHY_HAS_INTERRUPT,
+       .config_init    = am79c_config_init,
+       .config_aneg    = genphy_config_aneg,
+       .read_status    = genphy_read_status,
+       .ack_interrupt  = am79c_ack_interrupt,
+       .config_intr    = am79c_config_intr,
+       .driver         = { .owner = THIS_MODULE,},
+};
+
+static int __init am79c_init(void)
+{
+       int ret;
+
+       ret = phy_driver_register(&am79c_driver);
+       if (ret)
+               return ret;
+
+       return 0;
+}
+
+static void __exit am79c_exit(void)
+{
+       phy_driver_unregister(&am79c_driver);
+}
+
+module_init(am79c_init);
+module_exit(am79c_exit);
+
+static struct mdio_device_id __maybe_unused amd_tbl[] = {
+       { PHY_ID_AM79C874, 0xfffffff0 },
+       { }
+};
+
+MODULE_DEVICE_TABLE(mdio, amd_tbl);