arch/arm/mach-ixp4xx/nslu2-setup.c - kernel/msm-4.19 - Gitiles

 /*
  * arch/arm/mach-ixp4xx/nslu2-setup.c
  *
  * NSLU2 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 nslu2-power.c:
  *	Copyright (C) 2005 Tower Technologies
  *
  * Author: Mark Rakes <mrakes at mac.com>
  * Author: Rod Whitby <rod@whitby.id.au>
  * Author: Alessandro Zummo <a.zummo@towertech.it>
  * Maintainers: http://www.nslu2-linux.org/
  *
  */
 #include <linux/gpio.h>
 #include <linux/if_ether.h>
 #include <linux/irq.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>
 #include <asm/mach/time.h>

 #define NSLU2_SDA_PIN		7
 #define NSLU2_SCL_PIN		6

 /* NSLU2 Timer */
 #define NSLU2_FREQ 66000000

 /* Buttons */
 #define NSLU2_PB_GPIO		5	/* power button */
 #define NSLU2_PO_GPIO		8	/* power off */
 #define NSLU2_RB_GPIO		12	/* reset button */

 /* Buzzer */
 #define NSLU2_GPIO_BUZZ		4

 /* LEDs */
 #define NSLU2_LED_RED_GPIO	0
 #define NSLU2_LED_GRN_GPIO	1
 #define NSLU2_LED_DISK1_GPIO	3
 #define NSLU2_LED_DISK2_GPIO	2

 static struct flash_platform_data nslu2_flash_data = {
 	.map_name		= "cfi_probe",
 	.width			= 2,
 };

 static struct resource nslu2_flash_resource = {
 	.flags			= IORESOURCE_MEM,
 };

 static struct platform_device nslu2_flash = {
 	.name			= "IXP4XX-Flash",
 	.id			= 0,
 	.dev.platform_data	= &nslu2_flash_data,
 	.num_resources		= 1,
 	.resource		= &nslu2_flash_resource,
 };

 static struct i2c_gpio_platform_data nslu2_i2c_gpio_data = {
 	.sda_pin		= NSLU2_SDA_PIN,
 	.scl_pin		= NSLU2_SCL_PIN,
 };

 static struct i2c_board_info __initdata nslu2_i2c_board_info [] = {
 	{
 		I2C_BOARD_INFO("x1205", 0x6f),
 	},
 };

 static struct gpio_led nslu2_led_pins[] = {
 	{
 		.name		= "nslu2:green:ready",
 		.gpio		= NSLU2_LED_GRN_GPIO,
 	},
 	{
 		.name		= "nslu2:red:status",
 		.gpio		= NSLU2_LED_RED_GPIO,
 	},
 	{
 		.name		= "nslu2:green:disk-1",
 		.gpio		= NSLU2_LED_DISK1_GPIO,
 		.active_low	= true,
 	},
 	{
 		.name		= "nslu2:green:disk-2",
 		.gpio		= NSLU2_LED_DISK2_GPIO,
 		.active_low	= true,
 	},
 };

 static struct gpio_led_platform_data nslu2_led_data = {
 	.num_leds		= ARRAY_SIZE(nslu2_led_pins),
 	.leds			= nslu2_led_pins,
 };

 static struct platform_device nslu2_leds = {
 	.name			= "leds-gpio",
 	.id			= -1,
 	.dev.platform_data	= &nslu2_led_data,
 };

 static struct platform_device nslu2_i2c_gpio = {
 	.name			= "i2c-gpio",
 	.id			= 0,
 	.dev	 = {
 		.platform_data	= &nslu2_i2c_gpio_data,
 	},
 };

 static struct platform_device nslu2_beeper = {
 	.name			= "ixp4xx-beeper",
 	.id			= NSLU2_GPIO_BUZZ,
 	.num_resources		= 0,
 };

 static struct resource nslu2_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 nslu2_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 nslu2_uart = {
 	.name			= "serial8250",
 	.id			= PLAT8250_DEV_PLATFORM,
 	.dev.platform_data	= nslu2_uart_data,
 	.num_resources		= 2,
 	.resource		= nslu2_uart_resources,
 };

 /* Built-in 10/100 Ethernet MAC interfaces */
 static struct eth_plat_info nslu2_plat_eth[] = {
 	{
 		.phy		= 1,
 		.rxq		= 3,
 		.txreadyq	= 20,
 	}
 };

 static struct platform_device nslu2_eth[] = {
 	{
 		.name			= "ixp4xx_eth",
 		.id			= IXP4XX_ETH_NPEB,
 		.dev.platform_data	= nslu2_plat_eth,
 	}
 };

 static struct platform_device *nslu2_devices[] __initdata = {
 	&nslu2_i2c_gpio,
 	&nslu2_flash,
 	&nslu2_beeper,
 	&nslu2_leds,
 	&nslu2_eth[0],
 };

 static void nslu2_power_off(void)
 {
 	/* This causes the box to drop the power and go dead. */

 	/* enable the pwr cntl gpio */
 	gpio_line_config(NSLU2_PO_GPIO, IXP4XX_GPIO_OUT);

 	/* do the deed */
 	gpio_line_set(NSLU2_PO_GPIO, IXP4XX_GPIO_HIGH);
 }

 static irqreturn_t nslu2_power_handler(int irq, void *dev_id)
 {
 	/* Signal init to do the ctrlaltdel action, this will bypass init if
 	 * it hasn't started and do a kernel_restart.
 	 */
 	ctrl_alt_del();

 	return IRQ_HANDLED;
 }

 static irqreturn_t nslu2_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 nslu2_timer_init(void)
 {
     /* The xtal on this machine is non-standard. */
     ixp4xx_timer_freq = NSLU2_FREQ;

     /* Call standard timer_init function. */
     ixp4xx_timer_init();
 }

 static struct sys_timer nslu2_timer = {
     .init   = nslu2_timer_init,
 };

 static void __init nslu2_init(void)
 {
 	uint8_t __iomem *f;
 	int i;

 	ixp4xx_sys_init();

 	nslu2_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
 	nslu2_flash_resource.end =
 		IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;

 	i2c_register_board_info(0, nslu2_i2c_board_info,
 				ARRAY_SIZE(nslu2_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(&nslu2_uart);

 	platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices));

 	pm_power_off = nslu2_power_off;

 	if (request_irq(gpio_to_irq(NSLU2_RB_GPIO), &nslu2_reset_handler,
 		IRQF_DISABLED | IRQF_TRIGGER_LOW,
 		"NSLU2 reset button", NULL) < 0) {

 		printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
 			gpio_to_irq(NSLU2_RB_GPIO));
 	}

 	if (request_irq(gpio_to_irq(NSLU2_PB_GPIO), &nslu2_power_handler,
 		IRQF_DISABLED | IRQF_TRIGGER_HIGH,
 		"NSLU2 power button", NULL) < 0) {

 		printk(KERN_DEBUG "Power Button IRQ %d not available\n",
 			gpio_to_irq(NSLU2_PB_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), 0x40000);
 	if (f) {
 		for (i = 0; i < 6; i++)
 #ifdef __ARMEB__
 			nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + i);
 #else
 			nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + (i^3));
 #endif
 		iounmap(f);
 	}
 	printk(KERN_INFO "NSLU2: Using MAC address %pM for port 0\n",
 	       nslu2_plat_eth[0].hwaddr);

 }

 MACHINE_START(NSLU2, "Linksys NSLU2")
 	/* Maintainer: www.nslu2-linux.org */
 	.atag_offset	= 0x100,
 	.map_io		= ixp4xx_map_io,
 	.init_irq	= ixp4xx_init_irq,
 	.timer          = &nslu2_timer,
 	.init_machine	= nslu2_init,
 #if defined(CONFIG_PCI)
 	.dma_zone_size	= SZ_64M,
 #endif
 MACHINE_END
	/*
	* arch/arm/mach-ixp4xx/nslu2-setup.c
	*
	* NSLU2 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 nslu2-power.c:
	* Copyright (C) 2005 Tower Technologies
	*
	* Author: Mark Rakes <mrakes at mac.com>
	* Author: Rod Whitby <rod@whitby.id.au>
	* Author: Alessandro Zummo <a.zummo@towertech.it>
	* Maintainers: http://www.nslu2-linux.org/
	*
	*/
	#include <linux/gpio.h>
	#include <linux/if_ether.h>
	#include <linux/irq.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>
	#include <asm/mach/time.h>

	#define NSLU2_SDA_PIN 7
	#define NSLU2_SCL_PIN 6

	/* NSLU2 Timer */
	#define NSLU2_FREQ 66000000

	/* Buttons */
	#define NSLU2_PB_GPIO 5 /* power button */
	#define NSLU2_PO_GPIO 8 /* power off */
	#define NSLU2_RB_GPIO 12 /* reset button */

	/* Buzzer */
	#define NSLU2_GPIO_BUZZ 4

	/* LEDs */
	#define NSLU2_LED_RED_GPIO 0
	#define NSLU2_LED_GRN_GPIO 1
	#define NSLU2_LED_DISK1_GPIO 3
	#define NSLU2_LED_DISK2_GPIO 2

	static struct flash_platform_data nslu2_flash_data = {
	.map_name = "cfi_probe",
	.width = 2,
	};

	static struct resource nslu2_flash_resource = {
	.flags = IORESOURCE_MEM,
	};

	static struct platform_device nslu2_flash = {
	.name = "IXP4XX-Flash",
	.id = 0,
	.dev.platform_data = &nslu2_flash_data,
	.num_resources = 1,
	.resource = &nslu2_flash_resource,
	};

	static struct i2c_gpio_platform_data nslu2_i2c_gpio_data = {
	.sda_pin = NSLU2_SDA_PIN,
	.scl_pin = NSLU2_SCL_PIN,
	};

	static struct i2c_board_info __initdata nslu2_i2c_board_info [] = {
	{
	I2C_BOARD_INFO("x1205", 0x6f),
	},
	};

	static struct gpio_led nslu2_led_pins[] = {
	{
	.name = "nslu2:green:ready",
	.gpio = NSLU2_LED_GRN_GPIO,
	},
	{
	.name = "nslu2:red:status",
	.gpio = NSLU2_LED_RED_GPIO,
	},
	{
	.name = "nslu2:green:disk-1",
	.gpio = NSLU2_LED_DISK1_GPIO,
	.active_low = true,
	},
	{
	.name = "nslu2:green:disk-2",
	.gpio = NSLU2_LED_DISK2_GPIO,
	.active_low = true,
	},
	};

	static struct gpio_led_platform_data nslu2_led_data = {
	.num_leds = ARRAY_SIZE(nslu2_led_pins),
	.leds = nslu2_led_pins,
	};

	static struct platform_device nslu2_leds = {
	.name = "leds-gpio",
	.id = -1,
	.dev.platform_data = &nslu2_led_data,
	};

	static struct platform_device nslu2_i2c_gpio = {
	.name = "i2c-gpio",
	.id = 0,
	.dev = {
	.platform_data = &nslu2_i2c_gpio_data,
	},
	};

	static struct platform_device nslu2_beeper = {
	.name = "ixp4xx-beeper",
	.id = NSLU2_GPIO_BUZZ,
	.num_resources = 0,
	};

	static struct resource nslu2_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 nslu2_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 nslu2_uart = {
	.name = "serial8250",
	.id = PLAT8250_DEV_PLATFORM,
	.dev.platform_data = nslu2_uart_data,
	.num_resources = 2,
	.resource = nslu2_uart_resources,
	};

	/* Built-in 10/100 Ethernet MAC interfaces */
	static struct eth_plat_info nslu2_plat_eth[] = {
	{
	.phy = 1,
	.rxq = 3,
	.txreadyq = 20,
	}
	};

	static struct platform_device nslu2_eth[] = {
	{
	.name = "ixp4xx_eth",
	.id = IXP4XX_ETH_NPEB,
	.dev.platform_data = nslu2_plat_eth,
	}
	};

	static struct platform_device *nslu2_devices[] __initdata = {
	&nslu2_i2c_gpio,
	&nslu2_flash,
	&nslu2_beeper,
	&nslu2_leds,
	&nslu2_eth[0],
	};

	static void nslu2_power_off(void)
	{
	/* This causes the box to drop the power and go dead. */

	/* enable the pwr cntl gpio */
	gpio_line_config(NSLU2_PO_GPIO, IXP4XX_GPIO_OUT);

	/* do the deed */
	gpio_line_set(NSLU2_PO_GPIO, IXP4XX_GPIO_HIGH);
	}

	static irqreturn_t nslu2_power_handler(int irq, void *dev_id)
	{
	/* Signal init to do the ctrlaltdel action, this will bypass init if
	* it hasn't started and do a kernel_restart.
	*/
	ctrl_alt_del();

	return IRQ_HANDLED;
	}

	static irqreturn_t nslu2_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 nslu2_timer_init(void)
	{
	/* The xtal on this machine is non-standard. */
	ixp4xx_timer_freq = NSLU2_FREQ;

	/* Call standard timer_init function. */
	ixp4xx_timer_init();
	}

	static struct sys_timer nslu2_timer = {
	.init = nslu2_timer_init,
	};

	static void __init nslu2_init(void)
	{
	uint8_t __iomem *f;
	int i;

	ixp4xx_sys_init();

	nslu2_flash_resource.start = IXP4XX_EXP_BUS_BASE(0);
	nslu2_flash_resource.end =
	IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1;

	i2c_register_board_info(0, nslu2_i2c_board_info,
	ARRAY_SIZE(nslu2_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(&nslu2_uart);

	platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices));

	pm_power_off = nslu2_power_off;

	if (request_irq(gpio_to_irq(NSLU2_RB_GPIO), &nslu2_reset_handler,
	IRQF_DISABLED \| IRQF_TRIGGER_LOW,
	"NSLU2 reset button", NULL) < 0) {

	printk(KERN_DEBUG "Reset Button IRQ %d not available\n",
	gpio_to_irq(NSLU2_RB_GPIO));
	}

	if (request_irq(gpio_to_irq(NSLU2_PB_GPIO), &nslu2_power_handler,
	IRQF_DISABLED \| IRQF_TRIGGER_HIGH,
	"NSLU2 power button", NULL) < 0) {

	printk(KERN_DEBUG "Power Button IRQ %d not available\n",
	gpio_to_irq(NSLU2_PB_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), 0x40000);
	if (f) {
	for (i = 0; i < 6; i++)
	#ifdef __ARMEB__
	nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + i);
	#else
	nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + (i^3));
	#endif
	iounmap(f);
	}
	printk(KERN_INFO "NSLU2: Using MAC address %pM for port 0\n",
	nslu2_plat_eth[0].hwaddr);

	}

	MACHINE_START(NSLU2, "Linksys NSLU2")
	/* Maintainer: www.nslu2-linux.org */
	.atag_offset = 0x100,
	.map_io = ixp4xx_map_io,
	.init_irq = ixp4xx_init_irq,
	.timer = &nslu2_timer,
	.init_machine = nslu2_init,
	#if defined(CONFIG_PCI)
	.dma_zone_size = SZ_64M,
	#endif
	MACHINE_END