2 * arch/arm/mach-ixp4xx/nas100d-setup.c
6 * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au>
8 * based on ixdp425-setup.c:
9 * Copyright (C) 2003-2004 MontaVista Software, Inc.
10 * based on nas100d-power.c:
11 * Copyright (C) 2005 Tower Technologies
12 * based on nas100d-io.c
13 * Copyright (C) 2004 Karen Spearel
15 * Author: Alessandro Zummo <a.zummo@towertech.it>
16 * Author: Rod Whitby <rod@whitby.id.au>
17 * Maintainers: http://www.nslu2-linux.org/
21 #include <linux/if_ether.h>
22 #include <linux/irq.h>
23 #include <linux/jiffies.h>
24 #include <linux/timer.h>
25 #include <linux/serial.h>
26 #include <linux/serial_8250.h>
27 #include <linux/leds.h>
28 #include <linux/reboot.h>
29 #include <linux/i2c.h>
30 #include <linux/i2c-gpio.h>
32 #include <asm/mach-types.h>
33 #include <asm/mach/arch.h>
34 #include <asm/mach/flash.h>
38 static struct flash_platform_data nas100d_flash_data = {
39 .map_name = "cfi_probe",
43 static struct resource nas100d_flash_resource = {
44 .flags = IORESOURCE_MEM,
47 static struct platform_device nas100d_flash = {
48 .name = "IXP4XX-Flash",
50 .dev.platform_data = &nas100d_flash_data,
52 .resource = &nas100d_flash_resource,
55 static struct i2c_board_info __initdata nas100d_i2c_board_info [] = {
57 I2C_BOARD_INFO("rtc-pcf8563", 0x51),
61 static struct gpio_led nas100d_led_pins[] = {
63 .name = "wlan", /* green led */
64 .gpio = NAS100D_LED_WLAN_GPIO,
68 .name = "power", /* blue power led (off=flashing) */
69 .gpio = NAS100D_LED_PWR_GPIO,
73 .name = "disk", /* yellow led */
74 .gpio = NAS100D_LED_DISK_GPIO,
79 static struct gpio_led_platform_data nas100d_led_data = {
80 .num_leds = ARRAY_SIZE(nas100d_led_pins),
81 .leds = nas100d_led_pins,
84 static struct platform_device nas100d_leds = {
87 .dev.platform_data = &nas100d_led_data,
90 static struct i2c_gpio_platform_data nas100d_i2c_gpio_data = {
91 .sda_pin = NAS100D_SDA_PIN,
92 .scl_pin = NAS100D_SCL_PIN,
95 static struct platform_device nas100d_i2c_gpio = {
99 .platform_data = &nas100d_i2c_gpio_data,
103 static struct resource nas100d_uart_resources[] = {
105 .start = IXP4XX_UART1_BASE_PHYS,
106 .end = IXP4XX_UART1_BASE_PHYS + 0x0fff,
107 .flags = IORESOURCE_MEM,
110 .start = IXP4XX_UART2_BASE_PHYS,
111 .end = IXP4XX_UART2_BASE_PHYS + 0x0fff,
112 .flags = IORESOURCE_MEM,
116 static struct plat_serial8250_port nas100d_uart_data[] = {
118 .mapbase = IXP4XX_UART1_BASE_PHYS,
119 .membase = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
120 .irq = IRQ_IXP4XX_UART1,
121 .flags = UPF_BOOT_AUTOCONF,
124 .uartclk = IXP4XX_UART_XTAL,
127 .mapbase = IXP4XX_UART2_BASE_PHYS,
128 .membase = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
129 .irq = IRQ_IXP4XX_UART2,
130 .flags = UPF_BOOT_AUTOCONF,
133 .uartclk = IXP4XX_UART_XTAL,
138 static struct platform_device nas100d_uart = {
139 .name = "serial8250",
140 .id = PLAT8250_DEV_PLATFORM,
141 .dev.platform_data = nas100d_uart_data,
143 .resource = nas100d_uart_resources,
146 /* Built-in 10/100 Ethernet MAC interfaces */
147 static struct eth_plat_info nas100d_plat_eth[] = {
155 static struct platform_device nas100d_eth[] = {
157 .name = "ixp4xx_eth",
158 .id = IXP4XX_ETH_NPEB,
159 .dev.platform_data = nas100d_plat_eth,
163 static struct platform_device *nas100d_devices[] __initdata = {
170 static void nas100d_power_off(void)
172 /* This causes the box to drop the power and go dead. */
174 /* enable the pwr cntl gpio */
175 gpio_line_config(NAS100D_PO_GPIO, IXP4XX_GPIO_OUT);
178 gpio_line_set(NAS100D_PO_GPIO, IXP4XX_GPIO_HIGH);
181 /* This is used to make sure the power-button pusher is serious. The button
182 * must be held until the value of this counter reaches zero.
184 static int power_button_countdown;
186 /* Must hold the button down for at least this many counts to be processed */
187 #define PBUTTON_HOLDDOWN_COUNT 4 /* 2 secs */
189 static void nas100d_power_handler(unsigned long data);
190 static DEFINE_TIMER(nas100d_power_timer, nas100d_power_handler, 0, 0);
192 static void nas100d_power_handler(unsigned long data)
194 /* This routine is called twice per second to check the
195 * state of the power button.
198 if (gpio_get_value(NAS100D_PB_GPIO)) {
200 /* IO Pin is 1 (button pushed) */
201 if (power_button_countdown > 0)
202 power_button_countdown--;
206 /* Done on button release, to allow for auto-power-on mods. */
207 if (power_button_countdown == 0) {
208 /* Signal init to do the ctrlaltdel action,
209 * this will bypass init if it hasn't started
210 * and do a kernel_restart.
214 /* Change the state of the power LED to "blink" */
215 gpio_line_set(NAS100D_LED_PWR_GPIO, IXP4XX_GPIO_LOW);
217 power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
221 mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500));
224 static irqreturn_t nas100d_reset_handler(int irq, void *dev_id)
226 /* This is the paper-clip reset, it shuts the machine down directly. */
232 static void __init nas100d_init(void)
234 DECLARE_MAC_BUF(mac_buf);
240 /* gpio 14 and 15 are _not_ clocks */
241 *IXP4XX_GPIO_GPCLKR = 0;
243 nas100d_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
244 nas100d_flash_resource.end =
245 IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
247 i2c_register_board_info(0, nas100d_i2c_board_info,
248 ARRAY_SIZE(nas100d_i2c_board_info));
251 * This is only useful on a modified machine, but it is valuable
252 * to have it first in order to see debug messages, and so that
253 * it does *not* get removed if platform_add_devices fails!
255 (void)platform_device_register(&nas100d_uart);
257 platform_add_devices(nas100d_devices, ARRAY_SIZE(nas100d_devices));
259 pm_power_off = nas100d_power_off;
261 if (request_irq(gpio_to_irq(NAS100D_RB_GPIO), &nas100d_reset_handler,
262 IRQF_DISABLED | IRQF_TRIGGER_LOW,
263 "NAS100D reset button", NULL) < 0) {
265 printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
266 gpio_to_irq(NAS100D_RB_GPIO));
269 /* The power button on the Iomega NAS100d is on GPIO 14, but
270 * it cannot handle interrupts on that GPIO line. So we'll
271 * have to poll it with a kernel timer.
274 /* Make sure that the power button GPIO is set up as an input */
275 gpio_line_config(NAS100D_PB_GPIO, IXP4XX_GPIO_IN);
277 /* Set the initial value for the power button IRQ handler */
278 power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
280 mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500));
283 * Map in a portion of the flash and read the MAC address.
284 * Since it is stored in BE in the flash itself, we need to
285 * byteswap it if we're in LE mode.
287 f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x1000000);
289 for (i = 0; i < 6; i++)
291 nas100d_plat_eth[0].hwaddr[i] = readb(f + 0xFC0FD8 + i);
293 nas100d_plat_eth[0].hwaddr[i] = readb(f + 0xFC0FD8 + (i^3));
297 printk(KERN_INFO "NAS100D: Using MAC address %s for port 0\n",
298 print_mac(mac_buf, nas100d_plat_eth[0].hwaddr));
302 MACHINE_START(NAS100D, "Iomega NAS 100d")
303 /* Maintainer: www.nslu2-linux.org */
304 .phys_io = IXP4XX_PERIPHERAL_BASE_PHYS,
305 .io_pg_offst = ((IXP4XX_PERIPHERAL_BASE_VIRT) >> 18) & 0xFFFC,
306 .boot_params = 0x00000100,
307 .map_io = ixp4xx_map_io,
308 .init_irq = ixp4xx_init_irq,
309 .timer = &ixp4xx_timer,
310 .init_machine = nas100d_init,