[ARM] 3140/1: NSLU2 machine support

Patch from Alessandro Zummo

This patch adds support for the LinkSys NSLU2 running with
both big and little-endian kernels. The LinkSys NSLU2 is
a cost engineered ARM, XScale 420 based system similar to
the the Intel IXDP425 evaluation board. It uses the
IXP4XX ARCH.

While this patch applies independently of other patches
the resultant kernel requires further patches to successfully
use onboard devices, including the onboard flash. Since these
patches are independent of this one they will be submitted
separately.

A defconfig is not included here because not all of
the required drivers are actually in the kernel.
We intend to provide one as soon as the patches
will be incorporated in mainstream.

This patch is the combined work of nslu2-linux.org

Signed-off-by: John Bowler <jbowler@acm.org>
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 134 insertions, 0 deletions

diff --git a/arch/arm/mach-ixp4xx/nslu2-setup.c b/arch/arm/mach-ixp4xx/nslu2-setup.c
new file mode 100644
index 000000000000..289e94cb65c2
--- /dev/null
+++ b/arch/arm/mach-ixp4xx/nslu2-setup.c
@@ -0,0 +1,134 @@
+/*
+ * arch/arm/mach-ixp4xx/nslu2-setup.c
+ *
+ * NSLU2 board-setup
+ *
+ * based ixdp425-setup.c:
+ *      Copyright (C) 2003-2004 MontaVista Software, Inc.
+ *
+ * Author: Mark Rakes <mrakes at mac.com>
+ * Maintainers: http://www.nslu2-linux.org/
+ *
+ * Fixed missing init_time in MACHINE_START kas11 10/22/04
+ * Changed to conform to new style __init ixdp425 kas11 10/22/04
+ */
+
+#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 nslu2_flash_data = {
+        .map_name               = "cfi_probe",
+        .width                  = 2,
+};
+
+static struct resource nslu2_flash_resource = {
+        .start                  = NSLU2_FLASH_BASE,
+        .end                    = NSLU2_FLASH_BASE + NSLU2_FLASH_SIZE,
+        .flags                  = IORESOURCE_MEM,
+};
+
+static struct platform_device nslu2_flash = {
+        .name                   = "IXP4XX-Flash",
+        .id                     = 0,
+        .dev.platform_data      = &nslu2_flash_data,
+        .num_resources          = 1,
+        .resource               = &nslu2_flash_resource,
+};
+
+static struct ixp4xx_i2c_pins nslu2_i2c_gpio_pins = {
+        .sda_pin                = NSLU2_SDA_PIN,
+        .scl_pin                = NSLU2_SCL_PIN,
+};
+
+static struct platform_device nslu2_i2c_controller = {
+        .name                   = "IXP4XX-I2C",
+        .id                     = 0,
+        .dev.platform_data      = &nslu2_i2c_gpio_pins,
+        .num_resources          = 0,
+};
+
+static struct resource nslu2_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 nslu2_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 nslu2_uart = {
+        .name                   = "serial8250",
+        .id                     = PLAT8250_DEV_PLATFORM,
+        .dev.platform_data      = nslu2_uart_data,
+        .num_resources          = 2,
+        .resource               = nslu2_uart_resources,
+};
+
+static struct platform_device *nslu2_devices[] __initdata = {
+        &nslu2_i2c_controller,
+        &nslu2_flash,
+        &nslu2_uart,
+};
+
+static void nslu2_power_off(void)
+{
+        /* This causes the box to drop the power and go dead. */
+
+        /* enable the pwr cntl gpio */
+        gpio_line_config(NSLU2_PO_GPIO, IXP4XX_GPIO_OUT);
+
+        /* do the deed */
+        gpio_line_set(NSLU2_PO_GPIO, IXP4XX_GPIO_HIGH);
+}
+
+static void __init nslu2_init(void)
+{
+        ixp4xx_sys_init();
+
+        pm_power_off = nslu2_power_off;
+
+        platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices));
+}
+
+MACHINE_START(NSLU2, "Linksys NSLU2")
+        /* Maintainer: www.nslu2-linux.org */
+        .phys_ram       = PHYS_OFFSET,
+        .phys_io        = IXP4XX_PERIPHERAL_BASE_PHYS,
+        .io_pg_offst    = ((IXP4XX_PERIPHERAL_BASE_VIRT) >> 18) & 0xFFFC,
+        .boot_params    = 0x00000100,
+        .map_io         = ixp4xx_map_io,
+        .init_irq       = ixp4xx_init_irq,
+        .timer          = &ixp4xx_timer,
+        .init_machine   = nslu2_init,
+MACHINE_END