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authorHeiko Schocher <hs@denx.de>2012-03-18 15:03:05 +0400
committerDavid S. Miller <davem@davemloft.net>2012-03-20 02:02:05 +0400
commit49099122a403b907dc12a5e66033678a07c68ba3 (patch)
tree6531b7cca21ea91ca6285bfedff244ce10a07292 /drivers/net/phy/amd.c
parent58a3de0592454c216c68427fa3c31a34823f5115 (diff)
downloadlinux-49099122a403b907dc12a5e66033678a07c68ba3.tar.xz
phy: add am79c874 PHY support
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>
Diffstat (limited to 'drivers/net/phy/amd.c')
-rw-r--r--drivers/net/phy/amd.c102
1 files changed, 102 insertions, 0 deletions
diff --git a/drivers/net/phy/amd.c b/drivers/net/phy/amd.c
new file mode 100644
index 000000000000..cfabd5fe5372
--- /dev/null
+++ b/drivers/net/phy/amd.c
@@ -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);