diff options
Diffstat (limited to 'kernel/arch/arm/mach-ixp4xx/dsmg600-setup.c')
| -rw-r--r-- | kernel/arch/arm/mach-ixp4xx/dsmg600-setup.c | 299 |
1 files changed, 299 insertions, 0 deletions
diff --git a/kernel/arch/arm/mach-ixp4xx/dsmg600-setup.c b/kernel/arch/arm/mach-ixp4xx/dsmg600-setup.c new file mode 100644 index 000000000..43ee06d3a --- /dev/null +++ b/kernel/arch/arm/mach-ixp4xx/dsmg600-setup.c @@ -0,0 +1,299 @@ +/* + * DSM-G600 board-setup + * + * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au> + * Copyright (C) 2006 Tower Technologies + * + * based on ixdp425-setup.c: + * Copyright (C) 2003-2004 MontaVista Software, Inc. + * based on nslu2-power.c: + * Copyright (C) 2005 Tower Technologies + * based on nslu2-io.c: + * Copyright (C) 2004 Karen Spearel + * + * Author: Alessandro Zummo <a.zummo@towertech.it> + * Author: Michael Westerhof <mwester@dls.net> + * Author: Rod Whitby <rod@whitby.id.au> + * Maintainers: http://www.nslu2-linux.org/ + */ +#include <linux/gpio.h> +#include <linux/irq.h> +#include <linux/jiffies.h> +#include <linux/timer.h> +#include <linux/serial.h> +#include <linux/serial_8250.h> +#include <linux/leds.h> +#include <linux/reboot.h> +#include <linux/i2c.h> +#include <linux/i2c-gpio.h> +#include <linux/gpio.h> + +#include <mach/hardware.h> + +#include <asm/mach-types.h> +#include <asm/mach/arch.h> +#include <asm/mach/flash.h> +#include <asm/mach/time.h> + +#define DSMG600_SDA_PIN 5 +#define DSMG600_SCL_PIN 4 + +/* DSM-G600 Timer Setting */ +#define DSMG600_FREQ 66000000 + +/* Buttons */ +#define DSMG600_PB_GPIO 15 /* power button */ +#define DSMG600_RB_GPIO 3 /* reset button */ + +/* Power control */ +#define DSMG600_PO_GPIO 2 /* power off */ + +/* LEDs */ +#define DSMG600_LED_PWR_GPIO 0 +#define DSMG600_LED_WLAN_GPIO 14 + +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 i2c_gpio_platform_data dsmg600_i2c_gpio_data = { + .sda_pin = DSMG600_SDA_PIN, + .scl_pin = DSMG600_SCL_PIN, +}; + +static struct platform_device dsmg600_i2c_gpio = { + .name = "i2c-gpio", + .id = 0, + .dev = { + .platform_data = &dsmg600_i2c_gpio_data, + }, +}; + +static struct i2c_board_info __initdata dsmg600_i2c_board_info [] = { + { + I2C_BOARD_INFO("pcf8563", 0x51), + }, +}; + +static struct gpio_led dsmg600_led_pins[] = { + { + .name = "dsmg600:green:power", + .gpio = DSMG600_LED_PWR_GPIO, + }, + { + .name = "dsmg600:green:wlan", + .gpio = DSMG600_LED_WLAN_GPIO, + .active_low = true, + }, +}; + +static struct gpio_led_platform_data dsmg600_led_data = { + .num_leds = ARRAY_SIZE(dsmg600_led_pins), + .leds = dsmg600_led_pins, +}; + +static struct platform_device dsmg600_leds = { + .name = "leds-gpio", + .id = -1, + .dev.platform_data = &dsmg600_led_data, +}; + +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_gpio, + &dsmg600_flash, + &dsmg600_leds, +}; + +static void dsmg600_power_off(void) +{ + /* enable the pwr cntl and drive it high */ + gpio_direction_output(DSMG600_PO_GPIO, 1); +} + +/* This is used to make sure the power-button pusher is serious. The button + * must be held until the value of this counter reaches zero. + */ +static int power_button_countdown; + +/* Must hold the button down for at least this many counts to be processed */ +#define PBUTTON_HOLDDOWN_COUNT 4 /* 2 secs */ + +static void dsmg600_power_handler(unsigned long data); +static DEFINE_TIMER(dsmg600_power_timer, dsmg600_power_handler, 0, 0); + +static void dsmg600_power_handler(unsigned long data) +{ + /* This routine is called twice per second to check the + * state of the power button. + */ + + if (gpio_get_value(DSMG600_PB_GPIO)) { + + /* IO Pin is 1 (button pushed) */ + if (power_button_countdown > 0) + power_button_countdown--; + + } else { + + /* Done on button release, to allow for auto-power-on mods. */ + if (power_button_countdown == 0) { + /* Signal init to do the ctrlaltdel action, + * this will bypass init if it hasn't started + * and do a kernel_restart. + */ + ctrl_alt_del(); + + /* Change the state of the power LED to "blink" */ + gpio_set_value(DSMG600_LED_PWR_GPIO, 0); + } else { + power_button_countdown = PBUTTON_HOLDDOWN_COUNT; + } + } + + mod_timer(&dsmg600_power_timer, jiffies + msecs_to_jiffies(500)); +} + +static irqreturn_t dsmg600_reset_handler(int irq, void *dev_id) +{ + /* This is the paper-clip reset, it shuts the machine down directly. */ + machine_power_off(); + + return IRQ_HANDLED; +} + +static void __init dsmg600_timer_init(void) +{ + /* The xtal on this machine is non-standard. */ + ixp4xx_timer_freq = DSMG600_FREQ; + + /* Call standard timer_init function. */ + ixp4xx_timer_init(); +} + +static int __init dsmg600_gpio_init(void) +{ + if (!machine_is_dsmg600()) + return 0; + + gpio_request(DSMG600_RB_GPIO, "reset button"); + if (request_irq(gpio_to_irq(DSMG600_RB_GPIO), &dsmg600_reset_handler, + IRQF_TRIGGER_LOW, "DSM-G600 reset button", NULL) < 0) { + + printk(KERN_DEBUG "Reset Button IRQ %d not available\n", + gpio_to_irq(DSMG600_RB_GPIO)); + } + + /* + * The power button on the D-Link DSM-G600 is on GPIO 15, but + * it cannot handle interrupts on that GPIO line. So we'll + * have to poll it with a kernel timer. + */ + + /* Make sure that the power button GPIO is set up as an input */ + gpio_request(DSMG600_PB_GPIO, "power button"); + gpio_direction_input(DSMG600_PB_GPIO); + /* Request poweroff GPIO line */ + gpio_request(DSMG600_PO_GPIO, "power off button"); + + /* Set the initial value for the power button IRQ handler */ + power_button_countdown = PBUTTON_HOLDDOWN_COUNT; + + mod_timer(&dsmg600_power_timer, jiffies + msecs_to_jiffies(500)); + return 0; +} +device_initcall(dsmg600_gpio_init); + +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; + + i2c_register_board_info(0, dsmg600_i2c_board_info, + ARRAY_SIZE(dsmg600_i2c_board_info)); + + /* 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)); + + pm_power_off = dsmg600_power_off; +} + +MACHINE_START(DSMG600, "D-Link DSM-G600 RevA") + /* Maintainer: www.nslu2-linux.org */ + .atag_offset = 0x100, + .map_io = ixp4xx_map_io, + .init_early = ixp4xx_init_early, + .init_irq = ixp4xx_init_irq, + .init_time = dsmg600_timer_init, + .init_machine = dsmg600_init, +#if defined(CONFIG_PCI) + .dma_zone_size = SZ_64M, +#endif + .restart = ixp4xx_restart, +MACHINE_END |