1 files changed, 352 insertions, 0 deletions
diff --git a/arch/arm/mach-ixp4xx/nas100d-setup.c b/arch/arm/mach-ixp4xx/nas100d-setup.c
new file mode 100644
index 000000000..6959ad2e3
--- /dev/null
+++ b/arch/arm/mach-ixp4xx/nas100d-setup.c
@@ -0,0 +1,352 @@
+// 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>
+
+#include "irqs.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 resource nas100d_eth_resources[] = {
+	{
+		.start		= IXP4XX_EthB_BASE_PHYS,
+		.end		= IXP4XX_EthB_BASE_PHYS + 0x0fff,
+		.flags		= IORESOURCE_MEM,
+	},
+};
+
+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,
+		.num_resources		= ARRAY_SIZE(nas100d_eth_resources),
+		.resource		= nas100d_eth_resources,
+	}
+};
+
+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();
+
+	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