| // SPDX-License-Identifier: GPL-2.0 |
| /* |
| * arch/arm/mach-ixp4xx/fsg-setup.c |
| * |
| * FSG board-setup |
| * |
| * Copyright (C) 2008 Rod Whitby <rod@whitby.id.au> |
| * |
| * based on ixdp425-setup.c: |
| * Copyright (C) 2003-2004 MontaVista Software, Inc. |
| * based on nslu2-power.c |
| * Copyright (C) 2005 Tower Technologies |
| * |
| * Author: Rod Whitby <rod@whitby.id.au> |
| * Maintainers: http://www.nslu2-linux.org/ |
| * |
| */ |
| #include <linux/gpio.h> |
| #include <linux/if_ether.h> |
| #include <linux/irq.h> |
| #include <linux/serial.h> |
| #include <linux/serial_8250.h> |
| #include <linux/leds.h> |
| #include <linux/reboot.h> |
| #include <linux/i2c.h> |
| #include <linux/gpio/machine.h> |
| #include <linux/io.h> |
| #include <asm/mach-types.h> |
| #include <asm/mach/arch.h> |
| #include <asm/mach/flash.h> |
| #include <mach/hardware.h> |
| |
| #include "irqs.h" |
| |
| #define FSG_SDA_PIN 12 |
| #define FSG_SCL_PIN 13 |
| |
| #define FSG_SB_GPIO 4 /* sync button */ |
| #define FSG_RB_GPIO 9 /* reset button */ |
| #define FSG_UB_GPIO 10 /* usb button */ |
| |
| static struct flash_platform_data fsg_flash_data = { |
| .map_name = "cfi_probe", |
| .width = 2, |
| }; |
| |
| static struct resource fsg_flash_resource = { |
| .flags = IORESOURCE_MEM, |
| }; |
| |
| static struct platform_device fsg_flash = { |
| .name = "IXP4XX-Flash", |
| .id = 0, |
| .dev = { |
| .platform_data = &fsg_flash_data, |
| }, |
| .num_resources = 1, |
| .resource = &fsg_flash_resource, |
| }; |
| |
| static struct gpiod_lookup_table fsg_i2c_gpiod_table = { |
| .dev_id = "i2c-gpio.0", |
| .table = { |
| GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", FSG_SDA_PIN, |
| NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), |
| GPIO_LOOKUP_IDX("IXP4XX_GPIO_CHIP", FSG_SCL_PIN, |
| NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), |
| }, |
| }; |
| |
| static struct platform_device fsg_i2c_gpio = { |
| .name = "i2c-gpio", |
| .id = 0, |
| .dev = { |
| .platform_data = NULL, |
| }, |
| }; |
| |
| static struct i2c_board_info __initdata fsg_i2c_board_info [] = { |
| { |
| I2C_BOARD_INFO("isl1208", 0x6f), |
| }, |
| }; |
| |
| static struct resource fsg_uart_resources[] = { |
| { |
| .start = IXP4XX_UART1_BASE_PHYS, |
| .end = IXP4XX_UART1_BASE_PHYS + 0x0fff, |
| .flags = IORESOURCE_MEM, |
| }, |
| { |
| .start = IXP4XX_UART2_BASE_PHYS, |
| .end = IXP4XX_UART2_BASE_PHYS + 0x0fff, |
| .flags = IORESOURCE_MEM, |
| } |
| }; |
| |
| static struct plat_serial8250_port fsg_uart_data[] = { |
| { |
| .mapbase = IXP4XX_UART1_BASE_PHYS, |
| .membase = (char *)IXP4XX_UART1_BASE_VIRT + REG_OFFSET, |
| .irq = IRQ_IXP4XX_UART1, |
| .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, |
| .iotype = UPIO_MEM, |
| .regshift = 2, |
| .uartclk = IXP4XX_UART_XTAL, |
| }, |
| { |
| .mapbase = IXP4XX_UART2_BASE_PHYS, |
| .membase = (char *)IXP4XX_UART2_BASE_VIRT + REG_OFFSET, |
| .irq = IRQ_IXP4XX_UART2, |
| .flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST, |
| .iotype = UPIO_MEM, |
| .regshift = 2, |
| .uartclk = IXP4XX_UART_XTAL, |
| }, |
| { } |
| }; |
| |
| static struct platform_device fsg_uart = { |
| .name = "serial8250", |
| .id = PLAT8250_DEV_PLATFORM, |
| .dev = { |
| .platform_data = fsg_uart_data, |
| }, |
| .num_resources = ARRAY_SIZE(fsg_uart_resources), |
| .resource = fsg_uart_resources, |
| }; |
| |
| static struct platform_device fsg_leds = { |
| .name = "fsg-led", |
| .id = -1, |
| }; |
| |
| /* Built-in 10/100 Ethernet MAC interfaces */ |
| static struct resource fsg_eth_npeb_resources[] = { |
| { |
| .start = IXP4XX_EthB_BASE_PHYS, |
| .end = IXP4XX_EthB_BASE_PHYS + 0x0fff, |
| .flags = IORESOURCE_MEM, |
| }, |
| }; |
| |
| static struct resource fsg_eth_npec_resources[] = { |
| { |
| .start = IXP4XX_EthC_BASE_PHYS, |
| .end = IXP4XX_EthC_BASE_PHYS + 0x0fff, |
| .flags = IORESOURCE_MEM, |
| }, |
| }; |
| |
| static struct eth_plat_info fsg_plat_eth[] = { |
| { |
| .phy = 5, |
| .rxq = 3, |
| .txreadyq = 20, |
| }, { |
| .phy = 4, |
| .rxq = 4, |
| .txreadyq = 21, |
| } |
| }; |
| |
| static struct platform_device fsg_eth[] = { |
| { |
| .name = "ixp4xx_eth", |
| .id = IXP4XX_ETH_NPEB, |
| .dev = { |
| .platform_data = fsg_plat_eth, |
| }, |
| .num_resources = ARRAY_SIZE(fsg_eth_npeb_resources), |
| .resource = fsg_eth_npeb_resources, |
| }, { |
| .name = "ixp4xx_eth", |
| .id = IXP4XX_ETH_NPEC, |
| .dev = { |
| .platform_data = fsg_plat_eth + 1, |
| }, |
| .num_resources = ARRAY_SIZE(fsg_eth_npec_resources), |
| .resource = fsg_eth_npec_resources, |
| } |
| }; |
| |
| static struct platform_device *fsg_devices[] __initdata = { |
| &fsg_i2c_gpio, |
| &fsg_flash, |
| &fsg_leds, |
| &fsg_eth[0], |
| &fsg_eth[1], |
| }; |
| |
| static irqreturn_t fsg_power_handler(int irq, void *dev_id) |
| { |
| /* Signal init to do the ctrlaltdel action, this will bypass init if |
| * it hasn't started and do a kernel_restart. |
| */ |
| ctrl_alt_del(); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t fsg_reset_handler(int irq, void *dev_id) |
| { |
| /* This is the paper-clip reset which does an emergency reboot. */ |
| printk(KERN_INFO "Restarting system.\n"); |
| machine_restart(NULL); |
| |
| /* This should never be reached. */ |
| return IRQ_HANDLED; |
| } |
| |
| static void __init fsg_init(void) |
| { |
| uint8_t __iomem *f; |
| |
| ixp4xx_sys_init(); |
| |
| fsg_flash_resource.start = IXP4XX_EXP_BUS_BASE(0); |
| fsg_flash_resource.end = |
| IXP4XX_EXP_BUS_BASE(0) + ixp4xx_exp_bus_size - 1; |
| |
| *IXP4XX_EXP_CS0 |= IXP4XX_FLASH_WRITABLE; |
| *IXP4XX_EXP_CS1 = *IXP4XX_EXP_CS0; |
| |
| /* Configure CS2 for operation, 8bit and writable */ |
| *IXP4XX_EXP_CS2 = 0xbfff0002; |
| |
| gpiod_add_lookup_table(&fsg_i2c_gpiod_table); |
| i2c_register_board_info(0, fsg_i2c_board_info, |
| ARRAY_SIZE(fsg_i2c_board_info)); |
| |
| /* This is only useful on a modified machine, but it is valuable |
| * to have it first in order to see debug messages, and so that |
| * it does *not* get removed if platform_add_devices fails! |
| */ |
| (void)platform_device_register(&fsg_uart); |
| |
| platform_add_devices(fsg_devices, ARRAY_SIZE(fsg_devices)); |
| |
| if (request_irq(gpio_to_irq(FSG_RB_GPIO), &fsg_reset_handler, |
| IRQF_TRIGGER_LOW, "FSG reset button", NULL) < 0) { |
| |
| printk(KERN_DEBUG "Reset Button IRQ %d not available\n", |
| gpio_to_irq(FSG_RB_GPIO)); |
| } |
| |
| if (request_irq(gpio_to_irq(FSG_SB_GPIO), &fsg_power_handler, |
| IRQF_TRIGGER_LOW, "FSG power button", NULL) < 0) { |
| |
| printk(KERN_DEBUG "Power Button IRQ %d not available\n", |
| gpio_to_irq(FSG_SB_GPIO)); |
| } |
| |
| /* |
| * Map in a portion of the flash and read the MAC addresses. |
| * Since it is stored in BE in the flash itself, we need to |
| * byteswap it if we're in LE mode. |
| */ |
| f = ioremap(IXP4XX_EXP_BUS_BASE(0), 0x400000); |
| if (f) { |
| #ifdef __ARMEB__ |
| int i; |
| for (i = 0; i < 6; i++) { |
| fsg_plat_eth[0].hwaddr[i] = readb(f + 0x3C0422 + i); |
| fsg_plat_eth[1].hwaddr[i] = readb(f + 0x3C043B + i); |
| } |
| #else |
| |
| /* |
| Endian-swapped reads from unaligned addresses are |
| required to extract the two MACs from the big-endian |
| Redboot config area in flash. |
| */ |
| |
| fsg_plat_eth[0].hwaddr[0] = readb(f + 0x3C0421); |
| fsg_plat_eth[0].hwaddr[1] = readb(f + 0x3C0420); |
| fsg_plat_eth[0].hwaddr[2] = readb(f + 0x3C0427); |
| fsg_plat_eth[0].hwaddr[3] = readb(f + 0x3C0426); |
| fsg_plat_eth[0].hwaddr[4] = readb(f + 0x3C0425); |
| fsg_plat_eth[0].hwaddr[5] = readb(f + 0x3C0424); |
| |
| fsg_plat_eth[1].hwaddr[0] = readb(f + 0x3C0439); |
| fsg_plat_eth[1].hwaddr[1] = readb(f + 0x3C043F); |
| fsg_plat_eth[1].hwaddr[2] = readb(f + 0x3C043E); |
| fsg_plat_eth[1].hwaddr[3] = readb(f + 0x3C043D); |
| fsg_plat_eth[1].hwaddr[4] = readb(f + 0x3C043C); |
| fsg_plat_eth[1].hwaddr[5] = readb(f + 0x3C0443); |
| #endif |
| iounmap(f); |
| } |
| printk(KERN_INFO "FSG: Using MAC address %pM for port 0\n", |
| fsg_plat_eth[0].hwaddr); |
| printk(KERN_INFO "FSG: Using MAC address %pM for port 1\n", |
| fsg_plat_eth[1].hwaddr); |
| |
| } |
| |
| MACHINE_START(FSG, "Freecom FSG-3") |
| /* Maintainer: www.nslu2-linux.org */ |
| .map_io = ixp4xx_map_io, |
| .init_early = ixp4xx_init_early, |
| .init_irq = ixp4xx_init_irq, |
| .init_time = ixp4xx_timer_init, |
| .atag_offset = 0x100, |
| .init_machine = fsg_init, |
| #if defined(CONFIG_PCI) |
| .dma_zone_size = SZ_64M, |
| #endif |
| .restart = ixp4xx_restart, |
| MACHINE_END |
| |