[deliverable/linux.git] / arch / arm / mach-ixp4xx / dsmg600-setup.c

/*
 * 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/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 <asm/mach-types.h>
#include <asm/mach/arch.h>
#include <asm/mach/flash.h>
#include <asm/mach/time.h>
#include <asm/gpio.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 gpio */
	gpio_line_config(DSMG600_PO_GPIO, IXP4XX_GPIO_OUT);

	/* poweroff */
	gpio_line_set(DSMG600_PO_GPIO, IXP4XX_GPIO_HIGH);
}

/* 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_line_set(DSMG600_LED_PWR_GPIO, IXP4XX_GPIO_LOW);
		} 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 struct sys_timer dsmg600_timer = {
    .init   = dsmg600_timer_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;

	if (request_irq(gpio_to_irq(DSMG600_RB_GPIO), &dsmg600_reset_handler,
		IRQF_DISABLED | 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_line_config(DSMG600_PB_GPIO, IXP4XX_GPIO_IN);

	/* 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));
}

MACHINE_START(DSMG600, "D-Link DSM-G600 RevA")
	/* Maintainer: www.nslu2-linux.org */
	.boot_params	= 0x00000100,
	.map_io		= ixp4xx_map_io,
	.init_irq	= ixp4xx_init_irq,
	.timer          = &dsmg600_timer,
	.init_machine	= dsmg600_init,
#if defined(CONFIG_PCI)
	.dma_zone_size	= SZ_64M,
#endif
MACHINE_END
Commit	Line	Data
28bd3a0d MLJ	1	/*
	2	* DSM-G600 board-setup
	3	*
43816bcb	4	* Copyright (C) 2008 Rod Whitby <rod@whitby.id.au>
28bd3a0d	5	* Copyright (C) 2006 Tower Technologies
28bd3a0d	6	*
43816bcb	7	* based on ixdp425-setup.c:
28bd3a0d	8	* Copyright (C) 2003-2004 MontaVista Software, Inc.
43816bcb RW	9	* based on nslu2-power.c:
	10	* Copyright (C) 2005 Tower Technologies
	11	* based on nslu2-io.c:
	12	* Copyright (C) 2004 Karen Spearel
28bd3a0d MLJ	13	*
28bd3a0d MLJ	14	* Author: Alessandro Zummo <a.zummo@towertech.it>
43816bcb RW	15	* Author: Michael Westerhof <mwester@dls.net>
43816bcb RW	16	* Author: Rod Whitby <rod@whitby.id.au>
28bd3a0d MLJ	17	* Maintainers: http://www.nslu2-linux.org/
	18	*/
	19
43816bcb RW	20	#include <linux/irq.h>
	21	#include <linux/jiffies.h>
	22	#include <linux/timer.h>
28bd3a0d MLJ	23	#include <linux/serial.h>
28bd3a0d MLJ	24	#include <linux/serial_8250.h>
1208ebf2	25	#include <linux/leds.h>
43816bcb	26	#include <linux/reboot.h>
a9a424ce	27	#include <linux/i2c.h>
5a4a2387	28	#include <linux/i2c-gpio.h>
28bd3a0d MLJ	29
	30	#include <asm/mach-types.h>
	31	#include <asm/mach/arch.h>
	32	#include <asm/mach/flash.h>
435c5da0	33	#include <asm/mach/time.h>
43816bcb	34	#include <asm/gpio.h>
28bd3a0d	35
395e7127 KH	36	#define DSMG600_SDA_PIN 5
	37	#define DSMG600_SCL_PIN 4
	38
	39	/* DSM-G600 Timer Setting */
	40	#define DSMG600_FREQ 66000000
	41
	42	/* Buttons */
	43	#define DSMG600_PB_GPIO 15 /* power button */
	44	#define DSMG600_RB_GPIO 3 /* reset button */
	45
	46	/* Power control */
	47	#define DSMG600_PO_GPIO 2 /* power off */
	48
	49	/* LEDs */
	50	#define DSMG600_LED_PWR_GPIO 0
	51	#define DSMG600_LED_WLAN_GPIO 14
	52
28bd3a0d MLJ	53	static struct flash_platform_data dsmg600_flash_data = {
	54	.map_name = "cfi_probe",
	55	.width = 2,
	56	};
	57
	58	static struct resource dsmg600_flash_resource = {
	59	.flags = IORESOURCE_MEM,
	60	};
	61
	62	static struct platform_device dsmg600_flash = {
	63	.name = "IXP4XX-Flash",
	64	.id = 0,
	65	.dev.platform_data = &dsmg600_flash_data,
	66	.num_resources = 1,
	67	.resource = &dsmg600_flash_resource,
	68	};
	69
5a4a2387	70	static struct i2c_gpio_platform_data dsmg600_i2c_gpio_data = {
28bd3a0d MLJ	71	.sda_pin = DSMG600_SDA_PIN,
	72	.scl_pin = DSMG600_SCL_PIN,
	73	};
	74
5a4a2387 MLJ	75	static struct platform_device dsmg600_i2c_gpio = {
5a4a2387 MLJ	76	.name = "i2c-gpio",
28bd3a0d	77	.id = 0,
5a4a2387 MLJ	78	.dev = {
	79	.platform_data = &dsmg600_i2c_gpio_data,
	80	},
28bd3a0d MLJ	81	};
28bd3a0d MLJ	82
a9a424ce RW	83	static struct i2c_board_info __initdata dsmg600_i2c_board_info [] = {
a9a424ce RW	84	{
3760f736	85	I2C_BOARD_INFO("pcf8563", 0x51),
a9a424ce RW	86	},
	87	};
	88
1208ebf2	89	static struct gpio_led dsmg600_led_pins[] = {
28bd3a0d	90	{
6c152bee	91	.name = "dsmg600:green:power",
1208ebf2	92	.gpio = DSMG600_LED_PWR_GPIO,
28bd3a0d MLJ	93	},
28bd3a0d MLJ	94	{
6c152bee	95	.name = "dsmg600:green:wlan",
1208ebf2 RW	96	.gpio = DSMG600_LED_WLAN_GPIO,
1208ebf2 RW	97	.active_low = true,
28bd3a0d MLJ	98	},
	99	};
	100
1208ebf2 RW	101	static struct gpio_led_platform_data dsmg600_led_data = {
	102	.num_leds = ARRAY_SIZE(dsmg600_led_pins),
	103	.leds = dsmg600_led_pins,
	104	};
	105
28bd3a0d	106	static struct platform_device dsmg600_leds = {
1208ebf2 RW	107	.name = "leds-gpio",
	108	.id = -1,
	109	.dev.platform_data = &dsmg600_led_data,
28bd3a0d	110	};
28bd3a0d MLJ	111
	112	static struct resource dsmg600_uart_resources[] = {
	113	{
	114	.start = IXP4XX_UART1_BASE_PHYS,
	115	.end = IXP4XX_UART1_BASE_PHYS + 0x0fff,
	116	.flags = IORESOURCE_MEM,
	117	},
	118	{
	119	.start = IXP4XX_UART2_BASE_PHYS,
	120	.end = IXP4XX_UART2_BASE_PHYS + 0x0fff,
	121	.flags = IORESOURCE_MEM,
	122	}
	123	};
	124
	125	static struct plat_serial8250_port dsmg600_uart_data[] = {
	126	{
	127	.mapbase = IXP4XX_UART1_BASE_PHYS,
	128	.membase = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
	129	.irq = IRQ_IXP4XX_UART1,
	130	.flags = UPF_BOOT_AUTOCONF,
	131	.iotype = UPIO_MEM,
	132	.regshift = 2,
	133	.uartclk = IXP4XX_UART_XTAL,
	134	},
	135	{
	136	.mapbase = IXP4XX_UART2_BASE_PHYS,
	137	.membase = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
	138	.irq = IRQ_IXP4XX_UART2,
	139	.flags = UPF_BOOT_AUTOCONF,
	140	.iotype = UPIO_MEM,
	141	.regshift = 2,
	142	.uartclk = IXP4XX_UART_XTAL,
	143	},
	144	{ }
	145	};
	146
	147	static struct platform_device dsmg600_uart = {
	148	.name = "serial8250",
	149	.id = PLAT8250_DEV_PLATFORM,
	150	.dev.platform_data = dsmg600_uart_data,
	151	.num_resources = ARRAY_SIZE(dsmg600_uart_resources),
	152	.resource = dsmg600_uart_resources,
	153	};
	154
	155	static struct platform_device *dsmg600_devices[] __initdata = {
5a4a2387	156	&dsmg600_i2c_gpio,
28bd3a0d	157	&dsmg600_flash,
1208ebf2	158	&dsmg600_leds,
28bd3a0d MLJ	159	};
	160
	161	static void dsmg600_power_off(void)
	162	{
	163	/* enable the pwr cntl gpio */
	164	gpio_line_config(DSMG600_PO_GPIO, IXP4XX_GPIO_OUT);
	165
	166	/* poweroff */
	167	gpio_line_set(DSMG600_PO_GPIO, IXP4XX_GPIO_HIGH);
	168	}
	169
43816bcb RW	170	/* This is used to make sure the power-button pusher is serious. The button
	171	* must be held until the value of this counter reaches zero.
	172	*/
	173	static int power_button_countdown;
	174
	175	/* Must hold the button down for at least this many counts to be processed */
	176	#define PBUTTON_HOLDDOWN_COUNT 4 /* 2 secs */
	177
	178	static void dsmg600_power_handler(unsigned long data);
	179	static DEFINE_TIMER(dsmg600_power_timer, dsmg600_power_handler, 0, 0);
	180
	181	static void dsmg600_power_handler(unsigned long data)
	182	{
	183	/* This routine is called twice per second to check the
	184	* state of the power button.
	185	*/
	186
	187	if (gpio_get_value(DSMG600_PB_GPIO)) {
	188
	189	/* IO Pin is 1 (button pushed) */
	190	if (power_button_countdown > 0)
	191	power_button_countdown--;
	192
	193	} else {
	194
	195	/* Done on button release, to allow for auto-power-on mods. */
	196	if (power_button_countdown == 0) {
	197	/* Signal init to do the ctrlaltdel action,
	198	* this will bypass init if it hasn't started
	199	* and do a kernel_restart.
	200	*/
	201	ctrl_alt_del();
	202
	203	/* Change the state of the power LED to "blink" */
	204	gpio_line_set(DSMG600_LED_PWR_GPIO, IXP4XX_GPIO_LOW);
	205	} else {
	206	power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
	207	}
	208	}
	209
	210	mod_timer(&dsmg600_power_timer, jiffies + msecs_to_jiffies(500));
	211	}
	212
	213	static irqreturn_t dsmg600_reset_handler(int irq, void *dev_id)
	214	{
	215	/* This is the paper-clip reset, it shuts the machine down directly. */
	216	machine_power_off();
	217
	218	return IRQ_HANDLED;
	219	}
	220
435c5da0 MLJ	221	static void __init dsmg600_timer_init(void)
	222	{
	223	/* The xtal on this machine is non-standard. */
	224	ixp4xx_timer_freq = DSMG600_FREQ;
	225
	226	/* Call standard timer_init function. */
	227	ixp4xx_timer_init();
	228	}
	229
	230	static struct sys_timer dsmg600_timer = {
	231	.init = dsmg600_timer_init,
	232	};
	233
28bd3a0d MLJ	234	static void __init dsmg600_init(void)
	235	{
	236	ixp4xx_sys_init();
	237
	238	/* Make sure that GPIO14 and GPIO15 are not used as clocks */
	239	*IXP4XX_GPIO_GPCLKR = 0;
	240
	241	dsmg600_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
	242	dsmg600_flash_resource.end =
	243	IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
	244
a9a424ce RW	245	i2c_register_board_info(0, dsmg600_i2c_board_info,
	246	ARRAY_SIZE(dsmg600_i2c_board_info));
	247
28bd3a0d MLJ	248	/* The UART is required on the DSM-G600 (Redboot cannot use the
	249	* NIC) -- do it here so that it does not get removed if
	250	* platform_add_devices fails!
	251	*/
	252	(void)platform_device_register(&dsmg600_uart);
	253
	254	platform_add_devices(dsmg600_devices, ARRAY_SIZE(dsmg600_devices));
43816bcb RW	255
	256	pm_power_off = dsmg600_power_off;
	257
	258	if (request_irq(gpio_to_irq(DSMG600_RB_GPIO), &dsmg600_reset_handler,
	259	IRQF_DISABLED \| IRQF_TRIGGER_LOW,
	260	"DSM-G600 reset button", NULL) < 0) {
	261
	262	printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
	263	gpio_to_irq(DSMG600_RB_GPIO));
	264	}
	265
	266	/* The power button on the D-Link DSM-G600 is on GPIO 15, but
	267	* it cannot handle interrupts on that GPIO line. So we'll
	268	* have to poll it with a kernel timer.
	269	*/
	270
	271	/* Make sure that the power button GPIO is set up as an input */
	272	gpio_line_config(DSMG600_PB_GPIO, IXP4XX_GPIO_IN);
	273
	274	/* Set the initial value for the power button IRQ handler */
	275	power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
	276
	277	mod_timer(&dsmg600_power_timer, jiffies + msecs_to_jiffies(500));
28bd3a0d MLJ	278	}
28bd3a0d MLJ	279
28bd3a0d MLJ	280	MACHINE_START(DSMG600, "D-Link DSM-G600 RevA")
28bd3a0d MLJ	281	/* Maintainer: www.nslu2-linux.org */
28bd3a0d	282	.boot_params = 0x00000100,
28bd3a0d MLJ	283	.map_io = ixp4xx_map_io,
28bd3a0d MLJ	284	.init_irq = ixp4xx_init_irq,
435c5da0	285	.timer = &dsmg600_timer,
28bd3a0d	286	.init_machine = dsmg600_init,
7553ee77 NP	287	#if defined(CONFIG_PCI)
	288	.dma_zone_size = SZ_64M,
	289	#endif
28bd3a0d	290	MACHINE_END