From c291443dc97dadcf0c6afd04688a7d9f79a221b5 Mon Sep 17 00:00:00 2001
From: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Date: Wed, 29 Aug 2012 22:08:16 +0200
Subject: net: switchlib: add driver for Lantiq ADM6996I switch family

Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

--- a/drivers/net/switch/Makefile
+++ b/drivers/net/switch/Makefile
@@ -11,6 +11,7 @@ LIB	:= $(obj)libswitch.o
 
 COBJS-$(CONFIG_SWITCH_MULTI) += switch.o
 COBJS-$(CONFIG_SWITCH_PSB697X) += psb697x.o
+COBJS-$(CONFIG_SWITCH_ADM6996I) += adm6996i.o
 
 COBJS	:= $(COBJS-y)
 SRCS	:= $(COBJS:.o=.c)
--- /dev/null
+++ b/drivers/net/switch/adm6996i.c
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2011-2013 Daniel Schwierzeck, daniel.schwierzeck@gmail.com
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <malloc.h>
+#include <switch.h>
+#include <miiphy.h>
+
+#define ADM6996I_CHIPID0	0x1020
+#define ADM6996I_CHIPID1	0x0007
+#define ADM6996I_PORT_COUNT	6
+
+#define ADM6996I_REG_P0BC	0x001	/* P0 Basic Control */
+#define ADM6996I_REG_P1BC	0x003	/* P1 Basic Control */
+#define ADM6996I_REG_P2BC	0x005	/* P2 Basic Control */
+#define ADM6996I_REG_P3BC	0x007	/* P3 Basic Control */
+#define ADM6996I_REG_P4BC	0x008	/* P4 Basic Control */
+#define ADM6996I_REG_P5BC	0x009	/* P5 Basic Control */
+
+#define ADM6996I_REG_P0EC	0x002	/* P0 Extended Control */
+#define ADM6996I_REG_P1EC	0x002	/* P1 Extended Control */
+#define ADM6996I_REG_P2EC	0x004	/* P2 Extended Control */
+#define ADM6996I_REG_P3EC	0x004	/* P3 Extended Control */
+#define ADM6996I_REG_P4EC	0x006	/* P4 Extended Control */
+#define ADM6996I_REG_P5EC	0x006	/* P5 Extended Control */
+
+#define ADM6996I_REG_SC4	0x012	/* System Control 4 */
+
+#define ADM6996I_REG_CI0	0xA0	/* Chip Identifier 0 */
+#define ADM6996I_REG_CI1	0xA1	/* Chip Identifier 1 */
+
+#define ADM6996I_REG_PXBC_DEFAULT	0x040F
+#define ADM6996I_REG_PXBC_CROSS_EE	(1 << 15)
+#define ADM6996I_REG_PXBC_PD		(1 << 5)
+
+#define ADM6996I_REG_SC4_DEFAULT	0x3600
+#define ADM6996I_REG_SC4_LED_ENABLE	(1 << 1)
+
+#define ADM6996I_REG_CI0_PC_MASK	0xFFF0
+#define ADM6996I_REG_CI0_VN_MASK	0xF
+#define ADM6996I_REG_CI1_PC_MASK	0xF
+
+
+static inline int adm6996i_mii_read(struct mii_dev *bus, u16 reg)
+{
+	int ret;
+
+	ret = bus->read(bus, (reg >> 5) & 0x1f, MDIO_DEVAD_NONE, reg & 0x1f);
+
+	return ret;
+}
+
+static inline int adm6996i_mii_write(struct mii_dev *bus, u16 reg, u16 val)
+{
+	int ret;
+
+	ret = bus->write(bus, (reg >> 5) & 0x1f, MDIO_DEVAD_NONE,
+		reg & 0x1f, val);
+
+	return ret;
+}
+
+static int adm6996i_probe(struct switch_device *dev)
+{
+	struct mii_dev *bus = dev->bus;
+	u16 ci0, ci1;
+
+	ci0 = adm6996i_mii_read(bus, ADM6996I_REG_CI0);
+	ci1 = adm6996i_mii_read(bus, ADM6996I_REG_CI1);
+
+	ci0 &= ADM6996I_REG_CI0_PC_MASK;
+	ci1 &= ADM6996I_REG_CI1_PC_MASK;
+
+	if (ci0 == ADM6996I_CHIPID0 && ci1 == ADM6996I_CHIPID1)
+		return 0;
+
+	return 1;
+}
+
+static void adm6996i_setup(struct switch_device *dev)
+{
+	struct mii_dev *bus = dev->bus;
+	u16 val;
+
+	/*
+	 * Write default values (Port enable, 100 Mbps, Full Duplex,
+	 * Auto negotiation, Flow control) and enable crossover auto-detect
+	 */
+	val = ADM6996I_REG_PXBC_DEFAULT | ADM6996I_REG_PXBC_CROSS_EE;
+	adm6996i_mii_write(bus, ADM6996I_REG_P0BC, val);
+	adm6996i_mii_write(bus, ADM6996I_REG_P1BC, val);
+	adm6996i_mii_write(bus, ADM6996I_REG_P2BC, val);
+	adm6996i_mii_write(bus, ADM6996I_REG_P3BC, val);
+	adm6996i_mii_write(bus, ADM6996I_REG_P4BC, val);
+	adm6996i_mii_write(bus, ADM6996I_REG_P5BC, val);
+
+	val = ADM6996I_REG_SC4_DEFAULT | ADM6996I_REG_SC4_LED_ENABLE;
+	adm6996i_mii_write(bus, ADM6996I_REG_SC4, val);
+}
+
+static struct switch_driver adm6996i_drv = {
+	.name = "adm6996i",
+};
+
+void switch_adm6996i_init(void)
+{
+	/* For archs with manual relocation */
+	adm6996i_drv.probe = adm6996i_probe;
+	adm6996i_drv.setup = adm6996i_setup;
+
+	switch_driver_register(&adm6996i_drv);
+}
--- a/drivers/net/switch/switch.c
+++ b/drivers/net/switch/switch.c
@@ -20,6 +20,9 @@ void switch_init(void)
 #if defined(CONFIG_SWITCH_PSB697X)
 	switch_psb697x_init();
 #endif
+#if defined(CONFIG_SWITCH_ADM6996I)
+	switch_adm6996i_init();
+#endif
 
 	board_switch_init();
 }
--- a/include/switch.h
+++ b/include/switch.h
@@ -98,6 +98,7 @@ static inline void switch_setup(struct s
 
 /* Init functions for supported Switch drivers */
 extern void switch_psb697x_init(void);
+extern void switch_adm6996i_init(void);
 
 #endif /* __SWITCH_H */