From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001
From: André Fabian Silva Delgado <emulatorman@parabola.nu>
Date: Wed, 5 Aug 2015 17:04:01 -0300
Subject: Initial import

---
 drivers/net/phy/amd.c | 85 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 85 insertions(+)
 create mode 100644 drivers/net/phy/amd.c

(limited to 'drivers/net/phy/amd.c')

diff --git a/drivers/net/phy/amd.c b/drivers/net/phy/amd.c
new file mode 100644
index 000000000..65a488f82
--- /dev/null
+++ b/drivers/net/phy/amd.c
@@ -0,0 +1,85 @@
+/*
+ * 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,},
+} };
+
+module_phy_driver(am79c_driver);
+
+static struct mdio_device_id __maybe_unused amd_tbl[] = {
+	{ PHY_ID_AM79C874, 0xfffffff0 },
+	{ }
+};
+
+MODULE_DEVICE_TABLE(mdio, amd_tbl);
-- 
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