Add stub driver for ADM6996F switches (configured through MII)

The driver currently uses a hardcoded VLAN mapping and has no configuration yet
Tested on Accton MR3202a


git-svn-id: svn://svn.openwrt.org/openwrt/trunk@10869 3c298f89-4303-0410-b956-a3cf2f4a3e73

2 files changed, 275 insertions, 0 deletions

diff --git a/target/linux/generic-2.6/files/drivers/net/phy/adm6996.c b/target/linux/generic-2.6/files/drivers/net/phy/adm6996.c
new file mode 100644
index 0000000000..3033813ec0
--- /dev/null
+++ b/target/linux/generic-2.6/files/drivers/net/phy/adm6996.c
@@ -0,0 +1,170 @@
+/*
+ * ADM6996 switch driver
+ *
+ * Copyright (c) 2008 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of the GNU General Public License v2 as published by the
+ * Free Software Foundation
+ */
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/unistd.h>
+#include <linux/slab.h>
+#include <linux/interrupt.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/spinlock.h>
+#include <linux/mm.h>
+#include <linux/module.h>
+#include <linux/mii.h>
+#include <linux/ethtool.h>
+#include <linux/phy.h>
+
+#include <asm/io.h>
+#include <asm/irq.h>
+#include <asm/uaccess.h>
+#include "adm6996.h"
+
+MODULE_DESCRIPTION("Infineon ADM6996 Switch");
+MODULE_AUTHOR("Felix Fietkau");
+MODULE_LICENSE("GPL");
+
+struct adm6996_priv {
+	/* use abstraction for regops, we want to add gpio support in the future */
+	u16 (*read)(struct phy_device *phydev, enum admreg reg);
+	void (*write)(struct phy_device *phydev, enum admreg reg, u16 val);
+};
+
+#define to_adm(_phy) ((struct adm6996_priv *) (_phy)->priv)
+
+
+static inline u16
+r16(struct phy_device *pdev, enum admreg reg)
+{
+	return to_adm(pdev)->read(pdev, reg);
+}
+
+static inline void
+w16(struct phy_device *pdev, enum admreg reg, u16 val)
+{
+	to_adm(pdev)->write(pdev, reg, val);
+}
+
+
+static u16
+adm6996_read_mii_reg(struct phy_device *phydev, enum admreg reg)
+{
+	return phydev->bus->read(phydev->bus, PHYADDR(reg));
+}
+
+static void
+adm6996_write_mii_reg(struct phy_device *phydev, enum admreg reg, u16 val)
+{
+	phydev->bus->write(phydev->bus, PHYADDR(reg), val);
+}
+
+
+static int adm6996_config_init(struct phy_device *pdev)
+{
+	int i;
+
+	printk("%s: ADM6996 PHY driver attached.\n", pdev->attached_dev->name);
+	pdev->supported = ADVERTISED_100baseT_Full;
+	pdev->advertising = ADVERTISED_100baseT_Full;
+
+	/* initialize port and vlan settings */
+	for (i = 0; i < ADM_PHY_PORTS; i++) {
+		w16(pdev, adm_portcfg[i], ADM_PORTCFG_INIT |
+			ADM_PORTCFG_PVID((i == ADM_WAN_PORT) ? 1 : 0));
+	}
+	w16(pdev, adm_portcfg[5], ADM_PORTCFG_CPU);
+
+	/* reset all ports */
+	for (i = 0; i < ADM_PHY_PORTS; i++) {
+		w16(pdev, ADM_PHY_PORT(i), ADM_PHYCFG_INIT);
+	}
+
+	return 0;
+}
+
+static int adm6996_read_status(struct phy_device *phydev)
+{
+	phydev->speed = SPEED_100;
+	phydev->duplex = DUPLEX_FULL;
+	phydev->state = PHY_UP;
+	return 0;
+}
+
+static int adm6996_config_aneg(struct phy_device *phydev)
+{
+	return 0;
+}
+
+static int adm6996_probe(struct phy_device *pdev)
+{
+	struct adm6996_priv *priv;
+
+	priv = kzalloc(sizeof(struct adm6996_priv), GFP_KERNEL);
+	if (priv == NULL)
+		return -ENOMEM;
+
+	priv->read = adm6996_read_mii_reg;
+	priv->write = adm6996_write_mii_reg;
+	pdev->priv = priv;
+	return 0;
+}
+
+static void adm6996_remove(struct phy_device *pdev)
+{
+	kfree(pdev->priv);
+}
+
+static bool adm6996_detect(struct mii_bus *bus, int addr)
+{
+	u16 reg;
+
+	/* we only attach to phy id 0 */
+	if (addr != 0)
+		return false;
+
+	/* look for the switch on the bus */
+	reg = bus->read(bus, PHYADDR(ADM_SIG0)) & ADM_SIG0_MASK;
+	if (reg != ADM_SIG0_VAL)
+		return false;
+
+	reg = bus->read(bus, PHYADDR(ADM_SIG1)) & ADM_SIG1_MASK;
+	if (reg != ADM_SIG1_VAL)
+		return false;
+
+	return true;
+}
+
+static struct phy_driver adm6996_driver = {
+	.name		= "Infineon ADM6996",
+	.features	= PHY_BASIC_FEATURES,
+	.detect		= adm6996_detect,
+	.probe		= adm6996_probe,
+	.remove		= adm6996_remove,
+	.config_init	= &adm6996_config_init,
+	.config_aneg	= &adm6996_config_aneg,
+	.read_status	= &adm6996_read_status,
+	.driver		= { .owner = THIS_MODULE,},
+};
+
+static int __init adm6996_init(void)
+{
+	return phy_driver_register(&adm6996_driver);
+}
+
+static void __exit adm6996_exit(void)
+{
+	phy_driver_unregister(&adm6996_driver);
+}
+
+module_init(adm6996_init);
+module_exit(adm6996_exit);
diff --git a/target/linux/generic-2.6/files/drivers/net/phy/adm6996.h b/target/linux/generic-2.6/files/drivers/net/phy/adm6996.h
new file mode 100644
index 0000000000..e074901517
--- /dev/null
+++ b/target/linux/generic-2.6/files/drivers/net/phy/adm6996.h
@@ -0,0 +1,105 @@
+/*
+ * ADM6996 switch driver
+ *
+ * Copyright (c) 2008 Felix Fietkau <nbd@openwrt.org>
+ *
+ * This program is free software; you can redistribute  it and/or modify it
+ * under  the terms of the GNU General Public License v2 as published by the
+ * Free Software Foundation
+ */
+#ifndef __ADM6996_H
+#define __ADM6996_H
+
+#define ADM_PHY_PORTS	5
+#define ADM_CPU_PORT	5
+#define ADM_WAN_PORT	0 /* FIXME: dynamic ? */
+
+enum admreg {
+	ADM_EEPROM_BASE		= 0x0,
+		ADM_P0_CFG		= ADM_EEPROM_BASE + 1,
+		ADM_P1_CFG		= ADM_EEPROM_BASE + 3,
+		ADM_P2_CFG		= ADM_EEPROM_BASE + 5,
+		ADM_P3_CFG		= ADM_EEPROM_BASE + 7,
+		ADM_P4_CFG		= ADM_EEPROM_BASE + 8,
+		ADM_P5_CFG		= ADM_EEPROM_BASE + 9,
+	ADM_EEPROM_EXT_BASE	= 0x40,
+	ADM_COUNTER_BASE	= 0xa0,
+		ADM_SIG0		= ADM_COUNTER_BASE + 0,
+		ADM_SIG1		= ADM_COUNTER_BASE + 1,
+	ADM_PHY_BASE		= 0x200,
+#define ADM_PHY_PORT(n) (ADM_PHY_BASE + (0x20 * n))
+};
+
+/* Chip identification patterns */
+#define	ADM_SIG0_MASK	0xfff0
+#define ADM_SIG0_VAL	0x1020
+#define ADM_SIG1_MASK	0xffff
+#define ADM_SIG1_VAL	0x0007
+
+enum {
+	ADM_PHYCFG_COLTST     = (1 << 7),	/* Enable collision test */
+	ADM_PHYCFG_DPLX       = (1 << 8),	/* Enable full duplex */
+	ADM_PHYCFG_ANEN_RST   = (1 << 9),	/* Restart auto negotiation (self clear) */
+	ADM_PHYCFG_ISO        = (1 << 10),	/* Isolate PHY */
+	ADM_PHYCFG_PDN        = (1 << 11),	/* Power down PHY */
+	ADM_PHYCFG_ANEN       = (1 << 12),	/* Enable auto negotiation */
+	ADM_PHYCFG_SPEED_100  = (1 << 13),	/* Enable 100 Mbit/s */
+	ADM_PHYCFG_LPBK       = (1 << 14),	/* Enable loopback operation */
+	ADM_PHYCFG_RST        = (1 << 15),	/* Reset the port (self clear) */
+	ADM_PHYCFG_INIT = (
+		ADM_PHYCFG_RST |
+		ADM_PHYCFG_SPEED_100 |
+		ADM_PHYCFG_ANEN |
+		ADM_PHYCFG_ANEN_RST
+	)
+};
+
+enum {
+	ADM_PORTCFG_FC        = (1 << 0),	/* Enable 802.x flow control */
+	ADM_PORTCFG_AN        = (1 << 1),	/* Enable auto-negotiation */
+	ADM_PORTCFG_SPEED_100 = (1 << 2),	/* Enable 100 Mbit/s */
+	ADM_PORTCFG_DPLX      = (1 << 3),	/* Enable full duplex */
+	ADM_PORTCFG_OT        = (1 << 4),	/* Output tagged packets */
+	ADM_PORTCFG_PD        = (1 << 5),	/* Port disable */
+	ADM_PORTCFG_TV_PRIO   = (1 << 6),	/* 0 = VLAN based priority
+	                                 	 * 1 = TOS based priority */
+	ADM_PORTCFG_PPE       = (1 << 7),	/* Port based priority enable */
+	ADM_PORTCFG_PP_S      = (1 << 8),	/* Port based priority, 2 bits */
+	ADM_PORTCFG_PVID_BASE = (1 << 10),	/* Primary VLAN id, 4 bits */
+	ADM_PORTCFG_FSE	      = (1 << 14),	/* Fx select enable */
+	ADM_PORTCFG_CAM       = (1 << 15),	/* Crossover Auto MDIX */
+
+	ADM_PORTCFG_INIT = (
+		ADM_PORTCFG_FC |
+		ADM_PORTCFG_AN |
+		ADM_PORTCFG_SPEED_100 |
+		ADM_PORTCFG_DPLX |
+		ADM_PORTCFG_CAM
+	),
+	ADM_PORTCFG_CPU = (
+		ADM_PORTCFG_FC |
+		ADM_PORTCFG_SPEED_100 |
+		ADM_PORTCFG_OT |
+		ADM_PORTCFG_DPLX
+	),
+};
+
+#define ADM_PORTCFG_PPID(N) ((n & 0x3) << 8)
+#define ADM_PORTCFG_PVID(n) ((n & 0xf) << 10)
+
+static const u8 adm_portcfg[] = {
+	[0] = ADM_P0_CFG,
+	[1] = ADM_P1_CFG,
+	[2] = ADM_P2_CFG,
+	[3] = ADM_P3_CFG,
+	[4] = ADM_P4_CFG,
+	[5] = ADM_P5_CFG,
+};
+
+/*
+ * Split the register address in phy id and register
+ * it will get combined again by the mdio bus op
+ */
+#define PHYADDR(_reg)	((_reg >> 5) & 0xff), (_reg & 0x1f)
+
+#endif