--- /dev/null
+/*
+ * arch/arm/mach-ixp4xx/nas100d-setup.c
+ *
+ * NAS 100d board-setup
+ *
+ * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au>
+ *
+ * based on ixdp425-setup.c:
+ * Copyright (C) 2003-2004 MontaVista Software, Inc.
+ * based on nas100d-power.c:
+ * Copyright (C) 2005 Tower Technologies
+ * based on nas100d-io.c
+ * Copyright (C) 2004 Karen Spearel
+ *
+ * Author: Alessandro Zummo <a.zummo@towertech.it>
+ * Author: Rod Whitby <rod@whitby.id.au>
+ * Maintainers: http://www.nslu2-linux.org/
+ *
+ */
+#include <linux/gpio.h>
+#include <linux/if_ether.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/io.h>
+#include <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/flash.h>
+
+#define NAS100D_SDA_PIN 5
+#define NAS100D_SCL_PIN 6
+
+/* Buttons */
+#define NAS100D_PB_GPIO 14 /* power button */
+#define NAS100D_RB_GPIO 4 /* reset button */
+
+/* Power control */
+#define NAS100D_PO_GPIO 12 /* power off */
+
+/* LEDs */
+#define NAS100D_LED_WLAN_GPIO 0
+#define NAS100D_LED_DISK_GPIO 3
+#define NAS100D_LED_PWR_GPIO 15
+
+static struct flash_platform_data nas100d_flash_data = {
+ .map_name = "cfi_probe",
+ .width = 2,
+};
+
+static struct resource nas100d_flash_resource = {
+ .flags = IORESOURCE_MEM,
+};
+
+static struct platform_device nas100d_flash = {
+ .name = "IXP4XX-Flash",
+ .id = 0,
+ .dev.platform_data = &nas100d_flash_data,
+ .num_resources = 1,
+ .resource = &nas100d_flash_resource,
+};
+
+static struct i2c_board_info __initdata nas100d_i2c_board_info [] = {
+ {
+ I2C_BOARD_INFO("pcf8563", 0x51),
+ },
+};
+
+static struct gpio_led nas100d_led_pins[] = {
+ {
+ .name = "nas100d:green:wlan",
+ .gpio = NAS100D_LED_WLAN_GPIO,
+ .active_low = true,
+ },
+ {
+ .name = "nas100d:blue:power", /* (off=flashing) */
+ .gpio = NAS100D_LED_PWR_GPIO,
+ .active_low = true,
+ },
+ {
+ .name = "nas100d:yellow:disk",
+ .gpio = NAS100D_LED_DISK_GPIO,
+ .active_low = true,
+ },
+};
+
+static struct gpio_led_platform_data nas100d_led_data = {
+ .num_leds = ARRAY_SIZE(nas100d_led_pins),
+ .leds = nas100d_led_pins,
+};
+
+static struct platform_device nas100d_leds = {
+ .name = "leds-gpio",
+ .id = -1,
+ .dev.platform_data = &nas100d_led_data,
+};
+
+static struct i2c_gpio_platform_data nas100d_i2c_gpio_data = {
+ .sda_pin = NAS100D_SDA_PIN,
+ .scl_pin = NAS100D_SCL_PIN,
+};
+
+static struct platform_device nas100d_i2c_gpio = {
+ .name = "i2c-gpio",
+ .id = 0,
+ .dev = {
+ .platform_data = &nas100d_i2c_gpio_data,
+ },
+};
+
+static struct resource nas100d_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 nas100d_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 nas100d_uart = {
+ .name = "serial8250",
+ .id = PLAT8250_DEV_PLATFORM,
+ .dev.platform_data = nas100d_uart_data,
+ .num_resources = 2,
+ .resource = nas100d_uart_resources,
+};
+
+/* Built-in 10/100 Ethernet MAC interfaces */
+static struct eth_plat_info nas100d_plat_eth[] = {
+ {
+ .phy = 0,
+ .rxq = 3,
+ .txreadyq = 20,
+ }
+};
+
+static struct platform_device nas100d_eth[] = {
+ {
+ .name = "ixp4xx_eth",
+ .id = IXP4XX_ETH_NPEB,
+ .dev.platform_data = nas100d_plat_eth,
+ }
+};
+
+static struct platform_device *nas100d_devices[] __initdata = {
+ &nas100d_i2c_gpio,
+ &nas100d_flash,
+ &nas100d_leds,
+ &nas100d_eth[0],
+};
+
+static void nas100d_power_off(void)
+{
+ /* This causes the box to drop the power and go dead. */
+
+ /* enable the pwr cntl gpio and assert power off */
+ gpio_direction_output(NAS100D_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 nas100d_power_handler(unsigned long data);
+static DEFINE_TIMER(nas100d_power_timer, nas100d_power_handler, 0, 0);
+
+static void nas100d_power_handler(unsigned long data)
+{
+ /* This routine is called twice per second to check the
+ * state of the power button.
+ */
+
+ if (gpio_get_value(NAS100D_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(NAS100D_LED_PWR_GPIO, 0);
+ } else {
+ power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
+ }
+ }
+
+ mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500));
+}
+
+static irqreturn_t nas100d_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 int __init nas100d_gpio_init(void)
+{
+ if (!machine_is_nas100d())
+ return 0;
+
+ /*
+ * The power button on the Iomega NAS100d is on GPIO 14, but
+ * it cannot handle interrupts on that GPIO line. So we'll
+ * have to poll it with a kernel timer.
+ */
+
+ /* Request the power off GPIO */
+ gpio_request(NAS100D_PO_GPIO, "power off");
+
+ /* Make sure that the power button GPIO is set up as an input */
+ gpio_request(NAS100D_PB_GPIO, "power button");
+ gpio_direction_input(NAS100D_PB_GPIO);
+
+ /* Set the initial value for the power button IRQ handler */
+ power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
+
+ mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500));
+
+ return 0;
+}
+device_initcall(nas100d_gpio_init);
+
+static void __init nas100d_init(void)
+{
+ uint8_t __iomem *f;
+ int i;
+
+ ixp4xx_sys_init();
+
+ /* gpio 14 and 15 are _not_ clocks */
+ *IXP4XX_GPIO_GPCLKR = 0;
+
+ nas100d_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
+ nas100d_flash_resource.end =
+ IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
+
+ i2c_register_board_info(0, nas100d_i2c_board_info,
+ ARRAY_SIZE(nas100d_i2c_board_info));
+
+ /*
+ * This is only useful on a modified machine, but it is valuable
+ * to have it first in order to see debug messages, and so that
+ * it does *not* get removed if platform_add_devices fails!
+ */
+ (void)platform_device_register(&nas100d_uart);
+
+ platform_add_devices(nas100d_devices, ARRAY_SIZE(nas100d_devices));
+
+ pm_power_off = nas100d_power_off;
+
+ if (request_irq(gpio_to_irq(NAS100D_RB_GPIO), &nas100d_reset_handler,
+ IRQF_TRIGGER_LOW, "NAS100D reset button", NULL) < 0) {
+
+ printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
+ gpio_to_irq(NAS100D_RB_GPIO));
+ }
+
+ /*
+ * Map in a portion of the flash and read the MAC address.
+ * Since it is stored in BE in the flash itself, we need to
+ * byteswap it if we're in LE mode.
+ */
+ f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x1000000);
+ if (f) {
+ for (i = 0; i < 6; i++)
+#ifdef __ARMEB__
+ nas100d_plat_eth[0].hwaddr[i] = readb(f + 0xFC0FD8 + i);
+#else
+ nas100d_plat_eth[0].hwaddr[i] = readb(f + 0xFC0FD8 + (i^3));
+#endif
+ iounmap(f);
+ }
+ printk(KERN_INFO "NAS100D: Using MAC address %pM for port 0\n",
+ nas100d_plat_eth[0].hwaddr);
+
+}
+
+MACHINE_START(NAS100D, "Iomega NAS 100d")
+ /* 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 = ixp4xx_timer_init,
+ .init_machine = nas100d_init,
+#if defined(CONFIG_PCI)
+ .dma_zone_size = SZ_64M,
+#endif
+ .restart = ixp4xx_restart,
+MACHINE_END
Code Review / kvmfornfv.git / blobdiff