[ARM] 4874/2: ixp4xx: Add support for the Freecom FSG-3 board

The Freecom-FSG3 is a small network-attached-storage device with the
following feature set:

* Intel IXP422
* 4MB Flash (ixp4xx flash driver)
* 64MB RAM
* 4 USB 2.0 host ports (ehci and ohci drivers)
* 1 WAN (eth1) and 3 LAN (eth0) ethernet ports
  * Supported by the open source ixp4xx ethernet driver
* Via VT6421 disk controller (libata and sata-via drivers)
  * Internal hard disk (PATA supported, SATA not yet supported)
  * External SATA port (not yet supported)
* ISL1208 RTC chip
* Winbond 83782 temp sensor and fan controller
* MiniPCI slot

The ixp4xx_defconfig is also updated to support this device (the
leds-fsg driver is to be submitted separately via the leds tree after
this initial support is merged, as it depends on header gpio defines).

Signed-off-by: Rod Whitby <rod@whitby.id.au>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 276 insertions, 0 deletions

diff --git a/arch/arm/mach-ixp4xx/fsg-setup.c b/arch/arm/mach-ixp4xx/fsg-setup.c
new file mode 100644
index 00000000000..0db3a909ae6
--- /dev/null
+++ b/arch/arm/mach-ixp4xx/fsg-setup.c
@@ -0,0 +1,276 @@
+/*
+ * 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/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 <asm/mach-types.h>
+#include <asm/mach/arch.h>
+#include <asm/mach/flash.h>
+#include <asm/io.h>
+#include <asm/gpio.h>
+
+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("rtc-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)
+{
+	DECLARE_MAC_BUF(mac_buf);
+	uint8_t __iomem *f;
+	int i;
+
+	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__
+		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 %s for port 0\n",
+	       print_mac(mac_buf, fsg_plat_eth[0].hwaddr));
+	printk(KERN_INFO "FSG: Using MAC address %s for port 1\n",
+	       print_mac(mac_buf, fsg_plat_eth[1].hwaddr));
+
+}
+
+MACHINE_START(FSG, "Freecom FSG-3")
+	/* Maintainer: www.nslu2-linux.org */
+	.phys_io	= IXP4XX_PERIPHERAL_BASE_PHYS,
+	.io_pg_offst	= ((IXP4XX_PERIPHERAL_BASE_VIRT) >> 18) & 0xfffc,
+	.map_io		= ixp4xx_map_io,
+	.init_irq	= ixp4xx_init_irq,
+	.timer		= &ixp4xx_timer,
+	.boot_params	= 0x0100,
+	.init_machine	= fsg_init,
+MACHINE_END
+