321 lines
7.3 KiB
C
321 lines
7.3 KiB
C
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// 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 <rod@whitby.id.au>
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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 <rod@whitby.id.au>
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* Author: Alessandro Zummo <a.zummo@towertech.it>
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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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#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 platform_device nslu2_beeper = {
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.name = "ixp4xx-beeper",
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.id = NSLU2_GPIO_BUZZ,
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.num_resources = 0,
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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 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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}
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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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