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340 lines
7.7 KiB
340 lines
7.7 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* |
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* arch/arm/mach-ixp4xx/nslu2-setup.c |
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* |
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* NSLU2 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 nslu2-power.c: |
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* Copyright (C) 2005 Tower Technologies |
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* |
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* Author: Mark Rakes <mrakes at mac.com> |
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* Author: Rod Whitby <[email protected]> |
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* Author: Alessandro Zummo <[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/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 <asm/mach/time.h> |
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#include "irqs.h" |
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#define NSLU2_SDA_PIN 7 |
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#define NSLU2_SCL_PIN 6 |
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/* NSLU2 Timer */ |
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#define NSLU2_FREQ 66000000 |
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/* Buttons */ |
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#define NSLU2_PB_GPIO 5 /* power button */ |
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#define NSLU2_PO_GPIO 8 /* power off */ |
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#define NSLU2_RB_GPIO 12 /* reset button */ |
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/* Buzzer */ |
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#define NSLU2_GPIO_BUZZ 4 |
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/* LEDs */ |
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#define NSLU2_LED_RED_GPIO 0 |
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#define NSLU2_LED_GRN_GPIO 1 |
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#define NSLU2_LED_DISK1_GPIO 3 |
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#define NSLU2_LED_DISK2_GPIO 2 |
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static struct flash_platform_data nslu2_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 nslu2_flash_resource = { |
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.flags = IORESOURCE_MEM, |
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}; |
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static struct platform_device nslu2_flash = { |
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.name = "IXP4XX-Flash", |
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.id = 0, |
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.dev.platform_data = &nslu2_flash_data, |
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.num_resources = 1, |
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.resource = &nslu2_flash_resource, |
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}; |
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static struct gpiod_lookup_table nslu2_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", NSLU2_SDA_PIN, |
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NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), |
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GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", NSLU2_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 i2c_board_info __initdata nslu2_i2c_board_info [] = { |
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{ |
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I2C_BOARD_INFO("x1205", 0x6f), |
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}, |
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}; |
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static struct gpio_led nslu2_led_pins[] = { |
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{ |
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.name = "nslu2:green:ready", |
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.gpio = NSLU2_LED_GRN_GPIO, |
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}, |
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{ |
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.name = "nslu2:red:status", |
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.gpio = NSLU2_LED_RED_GPIO, |
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}, |
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{ |
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.name = "nslu2:green:disk-1", |
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.gpio = NSLU2_LED_DISK1_GPIO, |
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.active_low = true, |
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}, |
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{ |
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.name = "nslu2:green:disk-2", |
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.gpio = NSLU2_LED_DISK2_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 nslu2_led_data = { |
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.num_leds = ARRAY_SIZE(nslu2_led_pins), |
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.leds = nslu2_led_pins, |
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}; |
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static struct platform_device nslu2_leds = { |
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.name = "leds-gpio", |
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.id = -1, |
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.dev.platform_data = &nslu2_led_data, |
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}; |
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static struct platform_device nslu2_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 nslu2_beeper_resources[] = { |
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{ |
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.start = IRQ_IXP4XX_TIMER2, |
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.flags = IORESOURCE_IRQ, |
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}, |
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}; |
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static struct platform_device nslu2_beeper = { |
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.name = "ixp4xx-beeper", |
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.id = NSLU2_GPIO_BUZZ, |
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.resource = nslu2_beeper_resources, |
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.num_resources = ARRAY_SIZE(nslu2_beeper_resources), |
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}; |
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static struct resource nslu2_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 nslu2_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 nslu2_uart = { |
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.name = "serial8250", |
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.id = PLAT8250_DEV_PLATFORM, |
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.dev.platform_data = nslu2_uart_data, |
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.num_resources = 2, |
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.resource = nslu2_uart_resources, |
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}; |
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/* Built-in 10/100 Ethernet MAC interfaces */ |
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static struct resource nslu2_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 nslu2_plat_eth[] = { |
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{ |
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.phy = 1, |
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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 nslu2_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 = nslu2_plat_eth, |
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.num_resources = ARRAY_SIZE(nslu2_eth_resources), |
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.resource = nslu2_eth_resources, |
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} |
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}; |
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static struct platform_device *nslu2_devices[] __initdata = { |
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&nslu2_i2c_gpio, |
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&nslu2_flash, |
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&nslu2_beeper, |
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&nslu2_leds, |
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&nslu2_eth[0], |
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}; |
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static void nslu2_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(NSLU2_PO_GPIO, 1); |
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} |
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static irqreturn_t nslu2_power_handler(int irq, void *dev_id) |
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{ |
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/* Signal init to do the ctrlaltdel action, this will bypass init if |
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* it hasn't started and do a kernel_restart. |
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*/ |
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ctrl_alt_del(); |
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return IRQ_HANDLED; |
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} |
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static irqreturn_t nslu2_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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*/ |
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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 nslu2_gpio_init(void) |
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{ |
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if (!machine_is_nslu2()) |
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return 0; |
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/* Request the power off GPIO */ |
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return gpio_request(NSLU2_PO_GPIO, "power off"); |
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} |
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device_initcall(nslu2_gpio_init); |
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static void __init nslu2_timer_init(void) |
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{ |
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/* The xtal on this machine is non-standard. */ |
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ixp4xx_timer_freq = NSLU2_FREQ; |
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/* Call standard timer_init function. */ |
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ixp4xx_timer_init(); |
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} |
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static void __init nslu2_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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nslu2_flash_resource.start = IXP4XX_EXP_BUS_BASE(0); |
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nslu2_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(&nslu2_i2c_gpiod_table); |
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i2c_register_board_info(0, nslu2_i2c_board_info, |
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ARRAY_SIZE(nslu2_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(&nslu2_uart); |
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platform_add_devices(nslu2_devices, ARRAY_SIZE(nslu2_devices)); |
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pm_power_off = nslu2_power_off; |
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if (request_irq(gpio_to_irq(NSLU2_RB_GPIO), &nslu2_reset_handler, |
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IRQF_TRIGGER_LOW, "NSLU2 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(NSLU2_RB_GPIO)); |
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} |
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if (request_irq(gpio_to_irq(NSLU2_PB_GPIO), &nslu2_power_handler, |
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IRQF_TRIGGER_HIGH, "NSLU2 power button", NULL) < 0) { |
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printk(KERN_DEBUG "Power Button IRQ %d not available\n", |
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gpio_to_irq(NSLU2_PB_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), 0x40000); |
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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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nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + i); |
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#else |
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nslu2_plat_eth[0].hwaddr[i] = readb(f + 0x3FFB0 + (i^3)); |
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#endif |
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iounmap(f); |
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} |
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printk(KERN_INFO "NSLU2: Using MAC address %pM for port 0\n", |
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nslu2_plat_eth[0].hwaddr); |
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} |
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MACHINE_START(NSLU2, "Linksys NSLU2") |
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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 = nslu2_timer_init, |
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.init_machine = nslu2_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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