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352 lines
8.6 KiB
352 lines
8.6 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* arch/arm/mach-ixp4xx/nas100d-setup.c |
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* |
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* NAS 100d board-setup |
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* |
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* Copyright (C) 2008 Rod Whitby <[email protected]> |
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* |
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* based on ixdp425-setup.c: |
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* Copyright (C) 2003-2004 MontaVista Software, Inc. |
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* based on nas100d-power.c: |
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* Copyright (C) 2005 Tower Technologies |
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* based on nas100d-io.c |
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* Copyright (C) 2004 Karen Spearel |
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* |
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* Author: Alessandro Zummo <[email protected]> |
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* Author: Rod Whitby <[email protected]> |
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* Maintainers: http://www.nslu2-linux.org/ |
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* |
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*/ |
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#include <linux/gpio.h> |
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#include <linux/if_ether.h> |
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#include <linux/irq.h> |
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#include <linux/jiffies.h> |
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#include <linux/timer.h> |
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#include <linux/serial.h> |
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#include <linux/serial_8250.h> |
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#include <linux/leds.h> |
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#include <linux/reboot.h> |
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#include <linux/i2c.h> |
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#include <linux/gpio/machine.h> |
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#include <linux/io.h> |
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#include <asm/mach-types.h> |
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#include <asm/mach/arch.h> |
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#include <asm/mach/flash.h> |
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#include "irqs.h" |
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#define NAS100D_SDA_PIN 5 |
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#define NAS100D_SCL_PIN 6 |
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/* Buttons */ |
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#define NAS100D_PB_GPIO 14 /* power button */ |
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#define NAS100D_RB_GPIO 4 /* reset button */ |
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/* Power control */ |
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#define NAS100D_PO_GPIO 12 /* power off */ |
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/* LEDs */ |
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#define NAS100D_LED_WLAN_GPIO 0 |
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#define NAS100D_LED_DISK_GPIO 3 |
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#define NAS100D_LED_PWR_GPIO 15 |
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static struct flash_platform_data nas100d_flash_data = { |
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.map_name = "cfi_probe", |
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.width = 2, |
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}; |
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static struct resource nas100d_flash_resource = { |
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.flags = IORESOURCE_MEM, |
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}; |
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static struct platform_device nas100d_flash = { |
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.name = "IXP4XX-Flash", |
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.id = 0, |
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.dev.platform_data = &nas100d_flash_data, |
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.num_resources = 1, |
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.resource = &nas100d_flash_resource, |
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}; |
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static struct i2c_board_info __initdata nas100d_i2c_board_info [] = { |
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{ |
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I2C_BOARD_INFO("pcf8563", 0x51), |
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}, |
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}; |
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static struct gpio_led nas100d_led_pins[] = { |
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{ |
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.name = "nas100d:green:wlan", |
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.gpio = NAS100D_LED_WLAN_GPIO, |
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.active_low = true, |
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}, |
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{ |
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.name = "nas100d:blue:power", /* (off=flashing) */ |
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.gpio = NAS100D_LED_PWR_GPIO, |
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.active_low = true, |
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}, |
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{ |
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.name = "nas100d:yellow:disk", |
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.gpio = NAS100D_LED_DISK_GPIO, |
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.active_low = true, |
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}, |
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}; |
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static struct gpio_led_platform_data nas100d_led_data = { |
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.num_leds = ARRAY_SIZE(nas100d_led_pins), |
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.leds = nas100d_led_pins, |
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}; |
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static struct platform_device nas100d_leds = { |
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.name = "leds-gpio", |
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.id = -1, |
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.dev.platform_data = &nas100d_led_data, |
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}; |
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static struct gpiod_lookup_table nas100d_i2c_gpiod_table = { |
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.dev_id = "i2c-gpio.0", |
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.table = { |
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GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", NAS100D_SDA_PIN, |
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NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), |
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GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", NAS100D_SCL_PIN, |
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NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), |
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}, |
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}; |
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static struct platform_device nas100d_i2c_gpio = { |
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.name = "i2c-gpio", |
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.id = 0, |
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.dev = { |
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.platform_data = NULL, |
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}, |
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}; |
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static struct resource nas100d_uart_resources[] = { |
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{ |
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.start = IXP4XX_UART1_BASE_PHYS, |
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.end = IXP4XX_UART1_BASE_PHYS + 0x0fff, |
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.flags = IORESOURCE_MEM, |
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}, |
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{ |
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.start = IXP4XX_UART2_BASE_PHYS, |
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.end = IXP4XX_UART2_BASE_PHYS + 0x0fff, |
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.flags = IORESOURCE_MEM, |
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} |
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}; |
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static struct plat_serial8250_port nas100d_uart_data[] = { |
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{ |
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.mapbase = IXP4XX_UART1_BASE_PHYS, |
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.membase = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET, |
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.irq = IRQ_IXP4XX_UART1, |
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.flags = UPF_BOOT_AUTOCONF, |
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.iotype = UPIO_MEM, |
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.regshift = 2, |
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.uartclk = IXP4XX_UART_XTAL, |
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}, |
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{ |
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.mapbase = IXP4XX_UART2_BASE_PHYS, |
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.membase = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET, |
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.irq = IRQ_IXP4XX_UART2, |
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.flags = UPF_BOOT_AUTOCONF, |
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.iotype = UPIO_MEM, |
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.regshift = 2, |
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.uartclk = IXP4XX_UART_XTAL, |
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}, |
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{ } |
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}; |
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static struct platform_device nas100d_uart = { |
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.name = "serial8250", |
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.id = PLAT8250_DEV_PLATFORM, |
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.dev.platform_data = nas100d_uart_data, |
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.num_resources = 2, |
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.resource = nas100d_uart_resources, |
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}; |
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/* Built-in 10/100 Ethernet MAC interfaces */ |
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static struct resource nas100d_eth_resources[] = { |
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{ |
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.start = IXP4XX_EthB_BASE_PHYS, |
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.end = IXP4XX_EthB_BASE_PHYS + 0x0fff, |
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.flags = IORESOURCE_MEM, |
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}, |
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}; |
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static struct eth_plat_info nas100d_plat_eth[] = { |
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{ |
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.phy = 0, |
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.rxq = 3, |
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.txreadyq = 20, |
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} |
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}; |
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static struct platform_device nas100d_eth[] = { |
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{ |
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.name = "ixp4xx_eth", |
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.id = IXP4XX_ETH_NPEB, |
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.dev.platform_data = nas100d_plat_eth, |
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.num_resources = ARRAY_SIZE(nas100d_eth_resources), |
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.resource = nas100d_eth_resources, |
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} |
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}; |
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static struct platform_device *nas100d_devices[] __initdata = { |
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&nas100d_i2c_gpio, |
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&nas100d_flash, |
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&nas100d_leds, |
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&nas100d_eth[0], |
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}; |
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static void nas100d_power_off(void) |
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{ |
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/* This causes the box to drop the power and go dead. */ |
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/* enable the pwr cntl gpio and assert power off */ |
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gpio_direction_output(NAS100D_PO_GPIO, 1); |
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} |
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/* This is used to make sure the power-button pusher is serious. The button |
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* must be held until the value of this counter reaches zero. |
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*/ |
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static int power_button_countdown; |
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/* Must hold the button down for at least this many counts to be processed */ |
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#define PBUTTON_HOLDDOWN_COUNT 4 /* 2 secs */ |
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static void nas100d_power_handler(struct timer_list *unused); |
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static DEFINE_TIMER(nas100d_power_timer, nas100d_power_handler); |
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static void nas100d_power_handler(struct timer_list *unused) |
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{ |
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/* This routine is called twice per second to check the |
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* state of the power button. |
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*/ |
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if (gpio_get_value(NAS100D_PB_GPIO)) { |
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/* IO Pin is 1 (button pushed) */ |
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if (power_button_countdown > 0) |
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power_button_countdown--; |
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} else { |
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/* Done on button release, to allow for auto-power-on mods. */ |
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if (power_button_countdown == 0) { |
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/* Signal init to do the ctrlaltdel action, |
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* this will bypass init if it hasn't started |
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* and do a kernel_restart. |
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*/ |
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ctrl_alt_del(); |
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/* Change the state of the power LED to "blink" */ |
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gpio_set_value(NAS100D_LED_PWR_GPIO, 0); |
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} else { |
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power_button_countdown = PBUTTON_HOLDDOWN_COUNT; |
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} |
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} |
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mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500)); |
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} |
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static irqreturn_t nas100d_reset_handler(int irq, void *dev_id) |
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{ |
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/* This is the paper-clip reset, it shuts the machine down directly. */ |
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machine_power_off(); |
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return IRQ_HANDLED; |
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} |
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static int __init nas100d_gpio_init(void) |
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{ |
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if (!machine_is_nas100d()) |
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return 0; |
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/* |
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* The power button on the Iomega NAS100d is on GPIO 14, but |
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* it cannot handle interrupts on that GPIO line. So we'll |
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* have to poll it with a kernel timer. |
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*/ |
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/* Request the power off GPIO */ |
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gpio_request(NAS100D_PO_GPIO, "power off"); |
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/* Make sure that the power button GPIO is set up as an input */ |
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gpio_request(NAS100D_PB_GPIO, "power button"); |
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gpio_direction_input(NAS100D_PB_GPIO); |
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/* Set the initial value for the power button IRQ handler */ |
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power_button_countdown = PBUTTON_HOLDDOWN_COUNT; |
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mod_timer(&nas100d_power_timer, jiffies + msecs_to_jiffies(500)); |
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return 0; |
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} |
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device_initcall(nas100d_gpio_init); |
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static void __init nas100d_init(void) |
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{ |
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uint8_t __iomem *f; |
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int i; |
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ixp4xx_sys_init(); |
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nas100d_flash_resource.start = IXP4XX_EXP_BUS_BASE(0); |
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nas100d_flash_resource.end = |
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IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1; |
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gpiod_add_lookup_table(&nas100d_i2c_gpiod_table); |
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i2c_register_board_info(0, nas100d_i2c_board_info, |
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ARRAY_SIZE(nas100d_i2c_board_info)); |
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/* |
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* This is only useful on a modified machine, but it is valuable |
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* to have it first in order to see debug messages, and so that |
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* it does *not* get removed if platform_add_devices fails! |
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*/ |
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(void)platform_device_register(&nas100d_uart); |
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platform_add_devices(nas100d_devices, ARRAY_SIZE(nas100d_devices)); |
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pm_power_off = nas100d_power_off; |
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if (request_irq(gpio_to_irq(NAS100D_RB_GPIO), &nas100d_reset_handler, |
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IRQF_TRIGGER_LOW, "NAS100D reset button", NULL) < 0) { |
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printk(KERN_DEBUG "Reset Button IRQ %d not available\n", |
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gpio_to_irq(NAS100D_RB_GPIO)); |
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} |
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/* |
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* Map in a portion of the flash and read the MAC address. |
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* Since it is stored in BE in the flash itself, we need to |
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* byteswap it if we're in LE mode. |
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*/ |
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f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x1000000); |
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if (f) { |
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for (i = 0; i < 6; i++) |
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#ifdef __ARMEB__ |
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nas100d_plat_eth[0].hwaddr[i] = readb(f + 0xFC0FD8 + i); |
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#else |
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nas100d_plat_eth[0].hwaddr[i] = readb(f + 0xFC0FD8 + (i^3)); |
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#endif |
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iounmap(f); |
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} |
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printk(KERN_INFO "NAS100D: Using MAC address %pM for port 0\n", |
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nas100d_plat_eth[0].hwaddr); |
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} |
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MACHINE_START(NAS100D, "Iomega NAS 100d") |
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/* Maintainer: www.nslu2-linux.org */ |
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.atag_offset = 0x100, |
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.map_io = ixp4xx_map_io, |
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.init_early = ixp4xx_init_early, |
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.init_irq = ixp4xx_init_irq, |
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.init_time = ixp4xx_timer_init, |
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.init_machine = nas100d_init, |
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#if defined(CONFIG_PCI) |
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.dma_zone_size = SZ_64M, |
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#endif |
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.restart = ixp4xx_restart, |
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MACHINE_END
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