/* * 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/i2c-gpio.h> #include <linux/io.h> #include <asm/mach-types.h> #include <asm/mach/arch.h> #include <asm/mach/flash.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 i2c_gpio_platform_data fsg_i2c_gpio_data = { .sda_pin = FSG_SDA_PIN, .scl_pin = FSG_SCL_PIN, }; static struct platform_device fsg_i2c_gpio = { .name = "i2c-gpio", .id = 0, .dev = { .platform_data = &fsg_i2c_gpio_data, }, }; 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 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, }, }, { .name = "ixp4xx_eth", .id = IXP4XX_ETH_NPEC, .dev = { .platform_data = fsg_plat_eth + 1, }, } }; 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; 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_DISABLED | 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_DISABLED | 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, .timer = &ixp4xx_timer, .atag_offset = 0x100, .init_machine = fsg_init, #if defined(CONFIG_PCI) .dma_zone_size = SZ_64M, #endif .restart = ixp4xx_restart, MACHINE_END