src/kernel/linux/v4.19/arch/arm/mach-ixp4xx/nas100d-setup.c - T800 - Gitiles

 // SPDX-License-Identifier: GPL-2.0
 /*
  * 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/gpio/machine.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 gpiod_lookup_table nas100d_i2c_gpiod_table = {
 	.dev_id		= "i2c-gpio.0",
 	.table		= {
 		GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", NAS100D_SDA_PIN,
 				NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
 		GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", NAS100D_SCL_PIN,
 				NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN),
 	},
 };

 static struct platform_device nas100d_i2c_gpio = {
 	.name			= "i2c-gpio",
 	.id			= 0,
 	.dev	 = {
 		.platform_data	= NULL,
 	},
 };

 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(struct timer_list *unused);
 static DEFINE_TIMER(nas100d_power_timer, nas100d_power_handler);

 static void nas100d_power_handler(struct timer_list *unused)
 {
 	/* 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;

 	gpiod_add_lookup_table(&nas100d_i2c_gpiod_table);
 	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
	// SPDX-License-Identifier: GPL-2.0
	/*
	* 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/gpio/machine.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 gpiod_lookup_table nas100d_i2c_gpiod_table = {
	.dev_id = "i2c-gpio.0",
	.table = {
	GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", NAS100D_SDA_PIN,
	NULL, 0, GPIO_ACTIVE_HIGH \| GPIO_OPEN_DRAIN),
	GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", NAS100D_SCL_PIN,
	NULL, 1, GPIO_ACTIVE_HIGH \| GPIO_OPEN_DRAIN),
	},
	};

	static struct platform_device nas100d_i2c_gpio = {
	.name = "i2c-gpio",
	.id = 0,
	.dev = {
	.platform_data = NULL,
	},
	};

	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(struct timer_list *unused);
	static DEFINE_TIMER(nas100d_power_timer, nas100d_power_handler);

	static void nas100d_power_handler(struct timer_list *unused)
	{
	/* 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;

	gpiod_add_lookup_table(&nas100d_i2c_gpiod_table);
	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