[linux-2.6-block.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/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 <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
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/
28bd3a0d MLJ	18	*/
2f8163ba	19	#include <linux/gpio.h>
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	29
39f1601c AB	30	#include <mach/hardware.h>
39f1601c AB	31
28bd3a0d MLJ	32	#include <asm/mach-types.h>
	33	#include <asm/mach/arch.h>
	34	#include <asm/mach/flash.h>
435c5da0	35	#include <asm/mach/time.h>
28bd3a0d	36
395e7127 KH	37	#define DSMG600_SDA_PIN 5
	38	#define DSMG600_SCL_PIN 4
	39
	40	/* DSM-G600 Timer Setting */
	41	#define DSMG600_FREQ 66000000
	42
	43	/* Buttons */
	44	#define DSMG600_PB_GPIO 15 /* power button */
	45	#define DSMG600_RB_GPIO 3 /* reset button */
	46
	47	/* Power control */
	48	#define DSMG600_PO_GPIO 2 /* power off */
	49
	50	/* LEDs */
	51	#define DSMG600_LED_PWR_GPIO 0
	52	#define DSMG600_LED_WLAN_GPIO 14
	53
28bd3a0d MLJ	54	static struct flash_platform_data dsmg600_flash_data = {
	55	.map_name = "cfi_probe",
	56	.width = 2,
	57	};
	58
	59	static struct resource dsmg600_flash_resource = {
	60	.flags = IORESOURCE_MEM,
	61	};
	62
	63	static struct platform_device dsmg600_flash = {
	64	.name = "IXP4XX-Flash",
	65	.id = 0,
	66	.dev.platform_data = &dsmg600_flash_data,
	67	.num_resources = 1,
	68	.resource = &dsmg600_flash_resource,
	69	};
	70
5a4a2387	71	static struct i2c_gpio_platform_data dsmg600_i2c_gpio_data = {
28bd3a0d MLJ	72	.sda_pin = DSMG600_SDA_PIN,
	73	.scl_pin = DSMG600_SCL_PIN,
	74	};
	75
5a4a2387 MLJ	76	static struct platform_device dsmg600_i2c_gpio = {
5a4a2387 MLJ	77	.name = "i2c-gpio",
28bd3a0d	78	.id = 0,
5a4a2387 MLJ	79	.dev = {
	80	.platform_data = &dsmg600_i2c_gpio_data,
	81	},
28bd3a0d MLJ	82	};
28bd3a0d MLJ	83
a9a424ce RW	84	static struct i2c_board_info __initdata dsmg600_i2c_board_info [] = {
a9a424ce RW	85	{
3760f736	86	I2C_BOARD_INFO("pcf8563", 0x51),
a9a424ce RW	87	},
	88	};
	89
1208ebf2	90	static struct gpio_led dsmg600_led_pins[] = {
28bd3a0d	91	{
6c152bee	92	.name = "dsmg600:green:power",
1208ebf2	93	.gpio = DSMG600_LED_PWR_GPIO,
28bd3a0d MLJ	94	},
28bd3a0d MLJ	95	{
6c152bee	96	.name = "dsmg600:green:wlan",
1208ebf2 RW	97	.gpio = DSMG600_LED_WLAN_GPIO,
1208ebf2 RW	98	.active_low = true,
28bd3a0d MLJ	99	},
	100	};
	101
1208ebf2 RW	102	static struct gpio_led_platform_data dsmg600_led_data = {
	103	.num_leds = ARRAY_SIZE(dsmg600_led_pins),
	104	.leds = dsmg600_led_pins,
	105	};
	106
28bd3a0d	107	static struct platform_device dsmg600_leds = {
1208ebf2 RW	108	.name = "leds-gpio",
	109	.id = -1,
	110	.dev.platform_data = &dsmg600_led_data,
28bd3a0d	111	};
28bd3a0d MLJ	112
	113	static struct resource dsmg600_uart_resources[] = {
	114	{
	115	.start = IXP4XX_UART1_BASE_PHYS,
	116	.end = IXP4XX_UART1_BASE_PHYS + 0x0fff,
	117	.flags = IORESOURCE_MEM,
	118	},
	119	{
	120	.start = IXP4XX_UART2_BASE_PHYS,
	121	.end = IXP4XX_UART2_BASE_PHYS + 0x0fff,
	122	.flags = IORESOURCE_MEM,
	123	}
	124	};
	125
	126	static struct plat_serial8250_port dsmg600_uart_data[] = {
	127	{
	128	.mapbase = IXP4XX_UART1_BASE_PHYS,
	129	.membase = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET,
	130	.irq = IRQ_IXP4XX_UART1,
	131	.flags = UPF_BOOT_AUTOCONF,
	132	.iotype = UPIO_MEM,
	133	.regshift = 2,
	134	.uartclk = IXP4XX_UART_XTAL,
	135	},
	136	{
	137	.mapbase = IXP4XX_UART2_BASE_PHYS,
	138	.membase = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET,
	139	.irq = IRQ_IXP4XX_UART2,
	140	.flags = UPF_BOOT_AUTOCONF,
	141	.iotype = UPIO_MEM,
	142	.regshift = 2,
	143	.uartclk = IXP4XX_UART_XTAL,
	144	},
	145	{ }
	146	};
	147
	148	static struct platform_device dsmg600_uart = {
	149	.name = "serial8250",
	150	.id = PLAT8250_DEV_PLATFORM,
	151	.dev.platform_data = dsmg600_uart_data,
	152	.num_resources = ARRAY_SIZE(dsmg600_uart_resources),
	153	.resource = dsmg600_uart_resources,
	154	};
	155
	156	static struct platform_device *dsmg600_devices[] __initdata = {
5a4a2387	157	&dsmg600_i2c_gpio,
28bd3a0d	158	&dsmg600_flash,
1208ebf2	159	&dsmg600_leds,
28bd3a0d MLJ	160	};
	161
	162	static void dsmg600_power_off(void)
	163	{
8040dd09 LW	164	/* enable the pwr cntl and drive it high */
8040dd09 LW	165	gpio_direction_output(DSMG600_PO_GPIO, 1);
28bd3a0d MLJ	166	}
28bd3a0d MLJ	167
43816bcb RW	168	/* This is used to make sure the power-button pusher is serious. The button
	169	* must be held until the value of this counter reaches zero.
	170	*/
	171	static int power_button_countdown;
	172
	173	/* Must hold the button down for at least this many counts to be processed */
	174	#define PBUTTON_HOLDDOWN_COUNT 4 /* 2 secs */
	175
	176	static void dsmg600_power_handler(unsigned long data);
	177	static DEFINE_TIMER(dsmg600_power_timer, dsmg600_power_handler, 0, 0);
	178
	179	static void dsmg600_power_handler(unsigned long data)
	180	{
	181	/* This routine is called twice per second to check the
	182	* state of the power button.
	183	*/
	184
	185	if (gpio_get_value(DSMG600_PB_GPIO)) {
	186
	187	/* IO Pin is 1 (button pushed) */
	188	if (power_button_countdown > 0)
	189	power_button_countdown--;
	190
	191	} else {
	192
	193	/* Done on button release, to allow for auto-power-on mods. */
	194	if (power_button_countdown == 0) {
	195	/* Signal init to do the ctrlaltdel action,
	196	* this will bypass init if it hasn't started
	197	* and do a kernel_restart.
	198	*/
	199	ctrl_alt_del();
	200
	201	/* Change the state of the power LED to "blink" */
8040dd09	202	gpio_set_value(DSMG600_LED_PWR_GPIO, 0);
43816bcb RW	203	} else {
	204	power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
	205	}
	206	}
	207
	208	mod_timer(&dsmg600_power_timer, jiffies + msecs_to_jiffies(500));
	209	}
	210
	211	static irqreturn_t dsmg600_reset_handler(int irq, void *dev_id)
	212	{
	213	/* This is the paper-clip reset, it shuts the machine down directly. */
	214	machine_power_off();
	215
	216	return IRQ_HANDLED;
	217	}
	218
435c5da0 MLJ	219	static void __init dsmg600_timer_init(void)
	220	{
	221	/* The xtal on this machine is non-standard. */
	222	ixp4xx_timer_freq = DSMG600_FREQ;
	223
	224	/* Call standard timer_init function. */
	225	ixp4xx_timer_init();
	226	}
	227
8040dd09 LW	228	static int __init dsmg600_gpio_init(void)
	229	{
	230	if (!machine_is_dsmg600())
	231	return 0;
	232
	233	gpio_request(DSMG600_RB_GPIO, "reset button");
	234	if (request_irq(gpio_to_irq(DSMG600_RB_GPIO), &dsmg600_reset_handler,
1ee6564d	235	IRQF_TRIGGER_LOW, "DSM-G600 reset button", NULL) < 0) {
8040dd09 LW	236
	237	printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
	238	gpio_to_irq(DSMG600_RB_GPIO));
	239	}
	240
	241	/*
	242	* The power button on the D-Link DSM-G600 is on GPIO 15, but
	243	* it cannot handle interrupts on that GPIO line. So we'll
	244	* have to poll it with a kernel timer.
	245	*/
	246
	247	/* Make sure that the power button GPIO is set up as an input */
	248	gpio_request(DSMG600_PB_GPIO, "power button");
	249	gpio_direction_input(DSMG600_PB_GPIO);
	250	/* Request poweroff GPIO line */
	251	gpio_request(DSMG600_PO_GPIO, "power off button");
	252
	253	/* Set the initial value for the power button IRQ handler */
	254	power_button_countdown = PBUTTON_HOLDDOWN_COUNT;
	255
	256	mod_timer(&dsmg600_power_timer, jiffies + msecs_to_jiffies(500));
	257	return 0;
	258	}
	259	device_initcall(dsmg600_gpio_init);
	260
28bd3a0d MLJ	261	static void __init dsmg600_init(void)
	262	{
	263	ixp4xx_sys_init();
	264
	265	/* Make sure that GPIO14 and GPIO15 are not used as clocks */
	266	*IXP4XX_GPIO_GPCLKR = 0;
	267
	268	dsmg600_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
	269	dsmg600_flash_resource.end =
	270	IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;
	271
a9a424ce RW	272	i2c_register_board_info(0, dsmg600_i2c_board_info,
	273	ARRAY_SIZE(dsmg600_i2c_board_info));
	274
28bd3a0d MLJ	275	/* The UART is required on the DSM-G600 (Redboot cannot use the
	276	* NIC) -- do it here so that it does not get removed if
	277	* platform_add_devices fails!
	278	*/
	279	(void)platform_device_register(&dsmg600_uart);
	280
	281	platform_add_devices(dsmg600_devices, ARRAY_SIZE(dsmg600_devices));
43816bcb RW	282
43816bcb RW	283	pm_power_off = dsmg600_power_off;
28bd3a0d MLJ	284	}
28bd3a0d MLJ	285
28bd3a0d MLJ	286	MACHINE_START(DSMG600, "D-Link DSM-G600 RevA")
28bd3a0d MLJ	287	/* Maintainer: www.nslu2-linux.org */
e022c729	288	.atag_offset = 0x100,
28bd3a0d	289	.map_io = ixp4xx_map_io,
f449588c	290	.init_early = ixp4xx_init_early,
28bd3a0d	291	.init_irq = ixp4xx_init_irq,
6bb27d73	292	.init_time = dsmg600_timer_init,
28bd3a0d	293	.init_machine = dsmg600_init,
7553ee77 NP	294	#if defined(CONFIG_PCI)
	295	.dma_zone_size = SZ_64M,
	296	#endif
d1b860fb	297	.restart = ixp4xx_restart,
28bd3a0d	298	MACHINE_END