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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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f458ac4797
In order to probe this ethernet interface from the device tree all physical MMIO regions must be passed as resources. Begin this rewrite by first passing the port base address as a resource for all platforms using this driver, remap it in the driver and avoid using any reference of the statically mapped virtual address in the driver. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
340 lines
7.7 KiB
C
340 lines
7.7 KiB
C
// 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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#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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