openwrt-xburst/target/linux/lantiq/patches-3.7/0115-NET-PHY-adds-driver-for-lantiq-PHY11G.patch

From 12f4b99d63edc15849357c09e22a36445c2752cc Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Mon, 22 Oct 2012 09:28:30 +0200
Subject: [PATCH 115/123] NET: PHY: adds driver for lantiq PHY11G

Signed-off-by: John Crispin <blogic@openwrt.org>
---
 drivers/net/phy/Kconfig  |    5 ++
 drivers/net/phy/Makefile |    1 +
 drivers/net/phy/lantiq.c |  178 ++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 184 insertions(+)
 create mode 100644 drivers/net/phy/lantiq.c

diff --git a/drivers/net/phy/Kconfig b/drivers/net/phy/Kconfig
index 961f0b2..41a2992 100644
--- a/drivers/net/phy/Kconfig
+++ b/drivers/net/phy/Kconfig
@@ -107,6 +107,11 @@ config MICREL_PHY
 	---help---
 	  Supports the KSZ9021, VSC8201, KS8001 PHYs.
 
+config LANTIQ_PHY
+	tristate "Driver for Lantiq PHYs"
+	---help---
+	  Supports the 11G and 22E 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 9645e38..e2eeee3 100644
--- a/drivers/net/phy/Makefile
+++ b/drivers/net/phy/Makefile
@@ -23,6 +23,7 @@ obj-$(CONFIG_NATIONAL_PHY)	+= national.o
 obj-$(CONFIG_DP83640_PHY)	+= dp83640.o
 obj-$(CONFIG_STE10XP)		+= ste10Xp.o
 obj-$(CONFIG_MICREL_PHY)	+= micrel.o
+obj-$(CONFIG_LANTIQ_PHY)        += lantiq.o
 obj-$(CONFIG_MDIO_OCTEON)	+= mdio-octeon.o
 obj-$(CONFIG_MICREL_KS8995MA)	+= spi_ks8995.o
 obj-$(CONFIG_AT803X_PHY)	+= at803x.o
diff --git a/drivers/net/phy/lantiq.c b/drivers/net/phy/lantiq.c
new file mode 100644
index 0000000..ba4d7b7
--- /dev/null
+++ b/drivers/net/phy/lantiq.c
@@ -0,0 +1,178 @@
+/*
+ *   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.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
+ *
+ *   Copyright (C) 2012 Daniel Schwierzeck <daniel.schwierzeck@googlemail.com>
+ */
+
+#include <linux/module.h>
+#include <linux/phy.h>
+
+#define MII_MMDCTRL		0x0d
+#define MII_MMDDATA		0x0e
+
+#define MII_VR9_11G_IMASK	0x19	/* interrupt mask */
+#define MII_VR9_11G_ISTAT	0x1a	/* interrupt status */
+
+#define INT_VR9_11G_WOL		BIT(15)	/* Wake-On-LAN */
+#define INT_VR9_11G_ANE		BIT(11)	/* Auto-Neg error */
+#define INT_VR9_11G_ANC		BIT(10)	/* Auto-Neg complete */
+#define INT_VR9_11G_ADSC	BIT(5)	/* Link auto-downspeed detect */
+#define INT_VR9_11G_DXMC	BIT(2)	/* Duplex mode change */
+#define INT_VR9_11G_LSPC	BIT(1)	/* Link speed change */
+#define INT_VR9_11G_LSTC	BIT(0)	/* Link state change */
+#define INT_VR9_11G_MASK	(INT_VR9_11G_LSTC | INT_VR9_11G_ADSC)
+
+#define ADVERTISED_MPD		BIT(10)	/* Multi-port device */
+
+#define MMD_DEVAD		0x1f
+#define MMD_ACTYPE_SHIFT	14
+#define MMD_ACTYPE_ADDRESS	(0 << MMD_ACTYPE_SHIFT)
+#define MMD_ACTYPE_DATA		(1 << MMD_ACTYPE_SHIFT)
+#define MMD_ACTYPE_DATA_PI	(2 << MMD_ACTYPE_SHIFT)
+#define MMD_ACTYPE_DATA_PIWR	(3 << MMD_ACTYPE_SHIFT)
+
+static __maybe_unused int vr9_gphy_mmd_read(struct phy_device *phydev,
+						u16 regnum)
+{
+	phy_write(phydev, MII_MMDCTRL, MMD_ACTYPE_ADDRESS | MMD_DEVAD);
+	phy_write(phydev, MII_MMDDATA, regnum);
+	phy_write(phydev, MII_MMDCTRL, MMD_ACTYPE_DATA | MMD_DEVAD);
+
+	return phy_read(phydev, MII_MMDDATA);
+}
+
+static __maybe_unused int vr9_gphy_mmd_write(struct phy_device *phydev,
+						u16 regnum, u16 val)
+{
+	phy_write(phydev, MII_MMDCTRL, MMD_ACTYPE_ADDRESS | MMD_DEVAD);
+	phy_write(phydev, MII_MMDDATA, regnum);
+	phy_write(phydev, MII_MMDCTRL, MMD_ACTYPE_DATA | MMD_DEVAD);
+	phy_write(phydev, MII_MMDDATA, val);
+
+	return 0;
+}
+
+static int vr9_gphy_config_init(struct phy_device *phydev)
+{
+	int err;
+
+	dev_dbg(&phydev->dev, "%s\n", __func__);
+
+	/* Mask all interrupts */
+	err = phy_write(phydev, MII_VR9_11G_IMASK, 0);
+	if (err)
+		return err;
+
+	/* Clear all pending interrupts */
+	phy_read(phydev, MII_VR9_11G_ISTAT);
+
+	return 0;
+}
+
+static int vr9_gphy_config_aneg(struct phy_device *phydev)
+{
+	int reg, err;
+
+	/* Advertise as multi-port device */
+	reg = phy_read(phydev, MII_CTRL1000);
+	reg |= ADVERTISED_MPD;
+	err = phy_write(phydev, MII_CTRL1000, reg);
+	if (err)
+		return err;
+
+	return genphy_config_aneg(phydev);
+}
+
+static int vr9_gphy_ack_interrupt(struct phy_device *phydev)
+{
+	int reg;
+
+	/*
+	 * Possible IRQ numbers:
+	 * - IM3_IRL18 for GPHY0
+	 * - IM3_IRL17 for GPHY1
+	 *
+	 * Due to a silicon bug IRQ lines are not really independent from
+	 * each other. Sometimes the two lines are driven at the same time
+	 * if only one GPHY core raises the interrupt.
+	 */
+
+	reg = phy_read(phydev, MII_VR9_11G_ISTAT);
+
+	return (reg < 0) ? reg : 0;
+}
+
+static int vr9_gphy_did_interrupt(struct phy_device *phydev)
+{
+	int reg;
+
+	reg = phy_read(phydev, MII_VR9_11G_ISTAT);
+
+	return reg > 0;
+}
+
+static int vr9_gphy_config_intr(struct phy_device *phydev)
+{
+	int err;
+
+	if (phydev->interrupts == PHY_INTERRUPT_ENABLED)
+		err = phy_write(phydev, MII_VR9_11G_IMASK, INT_VR9_11G_MASK);
+	else
+		err = phy_write(phydev, MII_VR9_11G_IMASK, 0);
+
+	return err;
+}
+
+/* TODO: add vr9_gphy_22f_driver and drivers for external Lantiq PEF7071 PHYs */
+static struct phy_driver vr9_gphy_11g_driver = {
+	.phy_id		= 0xd565a408,
+	.phy_id_mask	= 0xfffffff0,
+	.name		= "Lantiq XWAY VR9 GPHY 11G",
+	.features	= (PHY_GBIT_FEATURES | SUPPORTED_Pause),
+	.flags		= 0, /*PHY_HAS_INTERRUPT,*/
+	.config_init	= vr9_gphy_config_init,
+	.config_aneg	= vr9_gphy_config_aneg,
+	.read_status	= genphy_read_status,
+	.ack_interrupt	= vr9_gphy_ack_interrupt,
+	.did_interrupt	= vr9_gphy_did_interrupt,
+	.config_intr	= vr9_gphy_config_intr,
+	.driver		= { .owner = THIS_MODULE },
+};
+
+static int __init ltq_phy_init(void)
+{
+	int err;
+
+	err = phy_driver_register(&vr9_gphy_11g_driver);
+	if (err)
+		goto err_out;
+
+	return 0;
+
+err_out:
+	return err;
+}
+
+static void __exit ltq_phy_exit(void)
+{
+	phy_driver_unregister(&vr9_gphy_11g_driver);
+}
+
+module_init(ltq_phy_init);
+module_exit(ltq_phy_exit);
+
+MODULE_DESCRIPTION("Lantiq PHY drivers");
+MODULE_AUTHOR("Daniel Schwierzeck <daniel.schwierzeck@googlemail.com>");
+MODULE_LICENSE("GPL");
-- 
1.7.10.4