a7918f39bb
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>
135 lines
3.1 KiB
C
135 lines
3.1 KiB
C
/*
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* arch/arm/mach-ixp4xx/nslu2-setup.c
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*
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* NSLU2 board-setup
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*
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* based ixdp425-setup.c:
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* Copyright (C) 2003-2004 MontaVista Software, Inc.
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*
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* Author: Mark Rakes <mrakes at mac.com>
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* Maintainers: http://www.nslu2-linux.org/
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*
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* Fixed missing init_time in MACHINE_START kas11 10/22/04
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* Changed to conform to new style __init ixdp425 kas11 10/22/04
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*/
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#include <linux/kernel.h>
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#include <linux/serial.h>
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#include <linux/serial_8250.h>
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#include <asm/mach-types.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/flash.h>
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static struct flash_platform_data nslu2_flash_data = {
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.map_name = "cfi_probe",
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.width = 2,
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};
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static struct resource nslu2_flash_resource = {
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.start = NSLU2_FLASH_BASE,
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.end = NSLU2_FLASH_BASE + NSLU2_FLASH_SIZE,
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.flags = IORESOURCE_MEM,
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};
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static struct platform_device nslu2_flash = {
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.name = "IXP4XX-Flash",
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.id = 0,
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.dev.platform_data = &nslu2_flash_data,
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.num_resources = 1,
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.resource = &nslu2_flash_resource,
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};
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static struct ixp4xx_i2c_pins nslu2_i2c_gpio_pins = {
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.sda_pin = NSLU2_SDA_PIN,
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.scl_pin = NSLU2_SCL_PIN,
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};
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static struct platform_device nslu2_i2c_controller = {
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.name = "IXP4XX-I2C",
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.id = 0,
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.dev.platform_data = &nslu2_i2c_gpio_pins,
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.num_resources = 0,
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};
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static struct resource nslu2_uart_resources[] = {
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{
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.start = IXP4XX_UART1_BASE_PHYS,
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.end = IXP4XX_UART1_BASE_PHYS + 0x0fff,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = IXP4XX_UART2_BASE_PHYS,
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.end = IXP4XX_UART2_BASE_PHYS + 0x0fff,
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.flags = IORESOURCE_MEM,
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}
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};
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static struct plat_serial8250_port nslu2_uart_data[] = {
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{
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.mapbase = IXP4XX_UART1_BASE_PHYS,
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.membase = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
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.irq = IRQ_IXP4XX_UART1,
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.flags = UPF_BOOT_AUTOCONF,
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.iotype = UPIO_MEM,
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.regshift = 2,
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.uartclk = IXP4XX_UART_XTAL,
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},
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{
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.mapbase = IXP4XX_UART2_BASE_PHYS,
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.membase = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
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.irq = IRQ_IXP4XX_UART2,
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.flags = UPF_BOOT_AUTOCONF,
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.iotype = UPIO_MEM,
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.regshift = 2,
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.uartclk = IXP4XX_UART_XTAL,
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},
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{ }
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};
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static struct platform_device nslu2_uart = {
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.name = "serial8250",
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.id = PLAT8250_DEV_PLATFORM,
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.dev.platform_data = nslu2_uart_data,
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.num_resources = 2,
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.resource = nslu2_uart_resources,
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};
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static struct platform_device *nslu2_devices[] __initdata = {
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&nslu2_i2c_controller,
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&nslu2_flash,
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&nslu2_uart,
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};
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static void nslu2_power_off(void)
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{
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/* This causes the box to drop the power and go dead. */
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/* enable the pwr cntl gpio */
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gpio_line_config(NSLU2_PO_GPIO, IXP4XX_GPIO_OUT);
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/* do the deed */
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gpio_line_set(NSLU2_PO_GPIO, IXP4XX_GPIO_HIGH);
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}
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static void __init nslu2_init(void)
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{
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ixp4xx_sys_init();
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pm_power_off = nslu2_power_off;
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platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices));
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}
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MACHINE_START(NSLU2, "Linksys NSLU2")
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/* Maintainer: www.nslu2-linux.org */
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.phys_ram = PHYS_OFFSET,
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.phys_io = IXP4XX_PERIPHERAL_BASE_PHYS,
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.io_pg_offst = ((IXP4XX_PERIPHERAL_BASE_VIRT) >> 18) & 0xFFFC,
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.boot_params = 0x00000100,
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.map_io = ixp4xx_map_io,
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.init_irq = ixp4xx_init_irq,
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.timer = &ixp4xx_timer,
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.init_machine = nslu2_init,
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MACHINE_END
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