[ARM] 4318/2: DSM-G600 Board Support

This patch adds support for the D-Link DSM-G600 Rev A.
This is an ARM XScale IXP4xx system relatively similar to
the NSLU2 and NAS-100D already supported by mainline. An
important difference is Gigabit Ethernet support using
the Via Velocity chipset.

This patch is the combined work of Michael Westerhof and
Alessandro Zummo, with contributions from Michael-Luke
Jones. This version addresses review comments from rmk
and Deepak Saxena.

Signed-off-by: Michael-Luke Jones <mlj28@cam.ac.uk>
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Michael Westerhof <mwester@dls.net>
Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 175 insertions, 0 deletions

diff --git a/arch/arm/mach-ixp4xx/dsmg600-setup.c b/arch/arm/mach-ixp4xx/dsmg600-setup.c
new file mode 100644
index 000000000000..1caff65e22cc
--- /dev/null
+++ b/arch/arm/mach-ixp4xx/dsmg600-setup.c
@@ -0,0 +1,175 @@
+/*
+ * DSM-G600 board-setup
+ *
+ * Copyright (C) 2006 Tower Technologies
+ * Author: Alessandro Zummo <a.zummo@towertech.it>
+ *
+ * based ixdp425-setup.c:
+ *      Copyright (C) 2003-2004 MontaVista Software, Inc.
+ *
+ * Author: Alessandro Zummo <a.zummo@towertech.it>
+ * Maintainers: http://www.nslu2-linux.org/
+ */
+
+#include <linux/kernel.h>
+#include <linux/serial.h>
+#include <linux/serial_8250.h>
+
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/flash.h>
+
+static struct flash_platform_data dsmg600_flash_data = {
+	.map_name		= "cfi_probe",
+	.width			= 2,
+};
+
+static struct resource dsmg600_flash_resource = {
+	.flags			= IORESOURCE_MEM,
+};
+
+static struct platform_device dsmg600_flash = {
+	.name			= "IXP4XX-Flash",
+	.id			= 0,
+	.dev.platform_data	= &dsmg600_flash_data,
+	.num_resources		= 1,
+	.resource		= &dsmg600_flash_resource,
+};
+
+static struct ixp4xx_i2c_pins dsmg600_i2c_gpio_pins = {
+	.sda_pin		= DSMG600_SDA_PIN,
+	.scl_pin		= DSMG600_SCL_PIN,
+};
+
+static struct platform_device dsmg600_i2c_controller = {
+	.name			= "IXP4XX-I2C",
+	.id			= 0,
+	.dev.platform_data	= &dsmg600_i2c_gpio_pins,
+};
+
+#ifdef CONFIG_LEDS_CLASS
+static struct resource dsmg600_led_resources[] = {
+	{
+		.name           = "power",
+		.start          = DSMG600_LED_PWR_GPIO,
+		.end            = DSMG600_LED_PWR_GPIO,
+		.flags          = IXP4XX_GPIO_HIGH,
+	},
+	{
+		.name           = "wlan",
+		.start		= DSMG600_LED_WLAN_GPIO,
+		.end            = DSMG600_LED_WLAN_GPIO,
+		.flags          = IXP4XX_GPIO_LOW,
+	},
+};
+
+static struct platform_device dsmg600_leds = {
+        .name                   = "IXP4XX-GPIO-LED",
+        .id                     = -1,
+        .num_resources          = ARRAY_SIZE(dsmg600_led_resources),
+        .resource               = dsmg600_led_resources,
+};
+#endif
+
+static struct resource dsmg600_uart_resources[] = {
+	{
+		.start		= IXP4XX_UART1_BASE_PHYS,
+		.end		= IXP4XX_UART1_BASE_PHYS + 0x0fff,
+		.flags		= IORESOURCE_MEM,
+	},
+	{
+		.start		= IXP4XX_UART2_BASE_PHYS,
+		.end		= IXP4XX_UART2_BASE_PHYS + 0x0fff,
+		.flags		= IORESOURCE_MEM,
+	}
+};
+
+static struct plat_serial8250_port dsmg600_uart_data[] = {
+	{
+		.mapbase	= IXP4XX_UART1_BASE_PHYS,
+		.membase	= (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
+		.irq		= IRQ_IXP4XX_UART1,
+		.flags		= UPF_BOOT_AUTOCONF,
+		.iotype		= UPIO_MEM,
+		.regshift	= 2,
+		.uartclk	= IXP4XX_UART_XTAL,
+	},
+	{
+		.mapbase	= IXP4XX_UART2_BASE_PHYS,
+		.membase	= (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
+		.irq		= IRQ_IXP4XX_UART2,
+		.flags		= UPF_BOOT_AUTOCONF,
+		.iotype		= UPIO_MEM,
+		.regshift	= 2,
+		.uartclk	= IXP4XX_UART_XTAL,
+	},
+	{ }
+};
+
+static struct platform_device dsmg600_uart = {
+	.name			= "serial8250",
+	.id			= PLAT8250_DEV_PLATFORM,
+	.dev.platform_data	= dsmg600_uart_data,
+	.num_resources		= ARRAY_SIZE(dsmg600_uart_resources),
+	.resource		= dsmg600_uart_resources,
+};
+
+static struct platform_device *dsmg600_devices[] __initdata = {
+	&dsmg600_i2c_controller,
+	&dsmg600_flash,
+};
+
+static void dsmg600_power_off(void)
+{
+	/* enable the pwr cntl gpio */
+	gpio_line_config(DSMG600_PO_GPIO, IXP4XX_GPIO_OUT);
+
+	/* poweroff */
+	gpio_line_set(DSMG600_PO_GPIO, IXP4XX_GPIO_HIGH);
+}
+
+static void __init dsmg600_init(void)
+{
+	ixp4xx_sys_init();
+
+	/* Make sure that GPIO14 and GPIO15 are not used as clocks */
+	*IXP4XX_GPIO_GPCLKR = 0;
+
+	dsmg600_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
+	dsmg600_flash_resource.end =
+		IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
+
+	pm_power_off = dsmg600_power_off;
+
+	/* The UART is required on the DSM-G600 (Redboot cannot use the
+	 * NIC) -- do it here so that it does *not* get removed if
+	 * platform_add_devices fails!
+         */
+        (void)platform_device_register(&dsmg600_uart);
+
+	platform_add_devices(dsmg600_devices, ARRAY_SIZE(dsmg600_devices));
+
+#ifdef CONFIG_LEDS_CLASS
+        /* We don't care whether or not this works. */
+        (void)platform_device_register(&dsmg600_leds);
+#endif
+}
+
+static void __init dsmg600_fixup(struct machine_desc *desc,
+                struct tag *tags, char **cmdline, struct meminfo *mi)
+{
+       /* The xtal on this machine is non-standard. */
+        ixp4xx_timer_freq = DSMG600_FREQ;
+}
+
+MACHINE_START(DSMG600, "D-Link DSM-G600 RevA")
+	/* Maintainer: www.nslu2-linux.org */
+	.phys_io	= IXP4XX_PERIPHERAL_BASE_PHYS,
+	.io_pg_offst	= ((IXP4XX_PERIPHERAL_BASE_VIRT) >> 18) & 0xFFFC,
+	.boot_params	= 0x00000100,
+	.fixup          = dsmg600_fixup,
+	.map_io		= ixp4xx_map_io,
+	.init_irq	= ixp4xx_init_irq,
+	.timer          = &ixp4xx_timer,
+	.init_machine	= dsmg600_init,
+MACHINE_END