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/*
* 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>
#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",
.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 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;
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
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