Basic support for the Arcom/Eurotech Viper SBC.

Signed-off-by: Marc Zyngier <marc.zyngier@altran.com>

1 files changed, 951 insertions, 0 deletions

diff --git a/arch/arm/mach-pxa/viper.c b/arch/arm/mach-pxa/viper.c
new file mode 100644
index 00000000000..d7632f63603
--- /dev/null
+++ b/arch/arm/mach-pxa/viper.c
@@ -0,0 +1,951 @@
+/*
+ *  linux/arch/arm/mach-pxa/viper.c
+ *
+ *  Support for the Arcom VIPER SBC.
+ *
+ *  Author:	Ian Campbell
+ *  Created:    Feb 03, 2003
+ *  Copyright:  Arcom Control Systems
+ *
+ *  Maintained by Marc Zyngier <maz@misterjones.org>
+ *                             <marc.zyngier@altran.com>
+ *
+ * Based on lubbock.c:
+ *  Author:	Nicolas Pitre
+ *  Created:	Jun 15, 2001
+ *  Copyright:	MontaVista Software Inc.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ */
+
+#include <linux/types.h>
+#include <linux/memory.h>
+#include <linux/cpu.h>
+#include <linux/cpufreq.h>
+#include <linux/delay.h>
+#include <linux/fs.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/major.h>
+#include <linux/module.h>
+#include <linux/pm.h>
+#include <linux/sched.h>
+#include <linux/gpio.h>
+#include <linux/i2c-gpio.h>
+#include <linux/serial_8250.h>
+#include <linux/smc91x.h>
+#include <linux/pwm_backlight.h>
+#include <linux/usb/isp116x.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/physmap.h>
+
+#include <mach/pxa-regs.h>
+#include <mach/pxa2xx-regs.h>
+#include <mach/bitfield.h>
+#include <mach/audio.h>
+#include <mach/pxafb.h>
+#include <mach/mfp-pxa25x.h>
+#include <mach/i2c.h>
+#include <mach/viper.h>
+
+#include <asm/setup.h>
+#include <asm/mach-types.h>
+#include <asm/irq.h>
+#include <asm/sizes.h>
+
+#include <asm/mach/arch.h>
+#include <asm/mach/map.h>
+#include <asm/mach/irq.h>
+
+#include "generic.h"
+#include "devices.h"
+
+static unsigned int icr;
+
+static void viper_icr_set_bit(unsigned int bit)
+{
+	icr |= bit;
+	VIPER_ICR = icr;
+}
+
+static void viper_icr_clear_bit(unsigned int bit)
+{
+	icr &= ~bit;
+	VIPER_ICR = icr;
+}
+
+/* This function is used from the pcmcia module to reset the CF */
+void viper_cf_rst(int state)
+{
+	if (state)
+		viper_icr_set_bit(VIPER_ICR_CF_RST);
+	else
+		viper_icr_clear_bit(VIPER_ICR_CF_RST);
+}
+EXPORT_SYMBOL(viper_cf_rst);
+
+/*
+ * The CPLD version register was not present on VIPER boards prior to
+ * v2i1. On v1 boards where the version register is not present we
+ * will just read back the previous value from the databus.
+ *
+ * Therefore we do two reads. The first time we write 0 to the
+ * (read-only) register before reading and the second time we write
+ * 0xff first. If the two reads do not match or they read back as 0xff
+ * or 0x00 then we have version 1 hardware.
+ */
+static u8 viper_hw_version(void)
+{
+	u8 v1, v2;
+	unsigned long flags;
+
+	local_irq_save(flags);
+
+	VIPER_VERSION = 0;
+	v1 = VIPER_VERSION;
+	VIPER_VERSION = 0xff;
+	v2 = VIPER_VERSION;
+
+	v1 = (v1 != v2 || v1 == 0xff) ? 0 : v1;
+
+	local_irq_restore(flags);
+	return v1;
+}
+
+/* CPU sysdev */
+static int viper_cpu_suspend(struct sys_device *sysdev, pm_message_t state)
+{
+	viper_icr_set_bit(VIPER_ICR_R_DIS);
+	return 0;
+}
+
+static int viper_cpu_resume(struct sys_device *sysdev)
+{
+	viper_icr_clear_bit(VIPER_ICR_R_DIS);
+	return 0;
+}
+
+static struct sysdev_driver viper_cpu_sysdev_driver = {
+	.suspend	= viper_cpu_suspend,
+	.resume		= viper_cpu_resume,
+};
+
+static unsigned int current_voltage_divisor;
+
+/*
+ * If force is not true then step from existing to new divisor. If
+ * force is true then jump straight to the new divisor. Stepping is
+ * used because if the jump in voltage is too large, the VCC can dip
+ * too low and the regulator cuts out.
+ *
+ * force can be used to initialize the divisor to a know state by
+ * setting the value for the current clock speed, since we are already
+ * running at that speed we know the voltage should be pretty close so
+ * the jump won't be too large
+ */
+static void viper_set_core_cpu_voltage(unsigned long khz, int force)
+{
+	int i = 0;
+	unsigned int divisor = 0;
+	const char *v;
+
+	if (khz < 200000) {
+		v = "1.0"; divisor = 0xfff;
+	} else if (khz < 300000) {
+		v = "1.1"; divisor = 0xde5;
+	} else {
+		v = "1.3"; divisor = 0x325;
+	}
+
+	pr_debug("viper: setting CPU core voltage to %sV at %d.%03dMHz\n",
+		 v, (int)khz / 1000, (int)khz % 1000);
+
+#define STEP 0x100
+	do {
+		int step;
+
+		if (force)
+			step = divisor;
+		else if (current_voltage_divisor < divisor - STEP)
+			step = current_voltage_divisor + STEP;
+		else if (current_voltage_divisor > divisor + STEP)
+			step = current_voltage_divisor - STEP;
+		else
+			step = divisor;
+		force = 0;
+
+		gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
+		gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
+
+		for (i = 1 << 11 ; i > 0 ; i >>= 1) {
+			udelay(1);
+
+			gpio_set_value(VIPER_PSU_DATA_GPIO, step & i);
+			udelay(1);
+
+			gpio_set_value(VIPER_PSU_CLK_GPIO, 1);
+			udelay(1);
+
+			gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
+		}
+		udelay(1);
+
+		gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 1);
+		udelay(1);
+
+		gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
+
+		current_voltage_divisor = step;
+	} while (current_voltage_divisor != divisor);
+}
+
+/* Interrupt handling */
+static unsigned long viper_irq_enabled_mask;
+
+static void viper_ack_irq(unsigned int irq)
+{
+	int viper_irq = irq - PXA_ISA_IRQ(0);
+
+	if (viper_irq < 8)
+		VIPER_LO_IRQ_STATUS = 1 << viper_irq;
+	else
+		VIPER_HI_IRQ_STATUS = 1 << (viper_irq - 8);
+}
+
+static void viper_mask_irq(unsigned int irq)
+{
+	viper_irq_enabled_mask &= ~(1 << (irq - PXA_ISA_IRQ(0)));
+}
+
+static void viper_unmask_irq(unsigned int irq)
+{
+	viper_irq_enabled_mask |= (1 << (irq - PXA_ISA_IRQ(0)));
+}
+
+static inline unsigned long viper_irq_pending(void)
+{
+	return (VIPER_HI_IRQ_STATUS << 8 | VIPER_LO_IRQ_STATUS) &
+			viper_irq_enabled_mask;
+}
+
+static void viper_irq_handler(unsigned int irq, struct irq_desc *desc)
+{
+	unsigned long pending;
+
+	pending = viper_irq_pending();
+	do {
+		if (likely(pending)) {
+			irq = PXA_ISA_IRQ(0) + __ffs(pending);
+			generic_handle_irq(irq);
+		}
+		pending = viper_irq_pending();
+	} while (pending);
+}
+
+static struct irq_chip viper_irq_chip = {
+	.name	= "ISA",
+	.ack	= viper_ack_irq,
+	.mask	= viper_mask_irq,
+	.unmask	= viper_unmask_irq
+};
+
+static void __init viper_init_irq(void)
+{
+	const int isa_irqs[] = { 3, 4, 5, 6, 7, 10, 11, 12, 9, 14, 15 };
+	int irq;
+	int isa_irq;
+
+	pxa25x_init_irq();
+
+	/* setup ISA IRQs */
+	for (irq = 0; irq < ARRAY_SIZE(isa_irqs); irq++) {
+		isa_irq = isa_irqs[irq];
+		set_irq_chip(isa_irq, &viper_irq_chip);
+		set_irq_handler(isa_irq, handle_edge_irq);
+		set_irq_flags(isa_irq, IRQF_VALID | IRQF_PROBE);
+	}
+
+	set_irq_chained_handler(gpio_to_irq(VIPER_CPLD_GPIO),
+				viper_irq_handler);
+	set_irq_type(gpio_to_irq(VIPER_CPLD_GPIO), IRQ_TYPE_EDGE_BOTH);
+
+#ifndef CONFIG_SERIAL_PXA
+	/*
+	 * 8250 doesn't support IRQ_TYPE being passed as part
+	 * of the plat_serial8250_port structure...
+	 */
+	set_irq_type(gpio_to_irq(VIPER_UARTA_GPIO), IRQ_TYPE_EDGE_RISING);
+	set_irq_type(gpio_to_irq(VIPER_UARTB_GPIO), IRQ_TYPE_EDGE_RISING);
+#endif
+}
+
+/* Flat Panel */
+static struct pxafb_mode_info fb_mode_info[] = {
+	{
+		.pixclock	= 157500,
+
+		.xres		= 320,
+		.yres		= 240,
+
+		.bpp		= 16,
+
+		.hsync_len	= 63,
+		.left_margin	= 7,
+		.right_margin	= 13,
+
+		.vsync_len	= 20,
+		.upper_margin	= 0,
+		.lower_margin	= 0,
+
+		.sync		= 0,
+	},
+};
+
+static struct pxafb_mach_info fb_info = {
+	.modes			= fb_mode_info,
+	.num_modes		= 1,
+	.lcd_conn		= LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
+};
+
+static int viper_backlight_init(struct device *dev)
+{
+	int ret;
+
+	/* GPIO9 and 10 control FB backlight. Initialise to off */
+	ret = gpio_request(VIPER_BCKLIGHT_EN_GPIO, "Backlight");
+	if (ret)
+		goto err_request_bckl;
+
+	ret = gpio_request(VIPER_LCD_EN_GPIO, "LCD");
+	if (ret)
+		goto err_request_lcd;
+
+	ret = gpio_direction_output(VIPER_BCKLIGHT_EN_GPIO, 0);
+	if (ret)
+		goto err_dir;
+
+	ret = gpio_direction_output(VIPER_LCD_EN_GPIO, 0);
+	if (ret)
+		goto err_dir;
+
+	return 0;
+
+err_dir:
+	gpio_free(VIPER_LCD_EN_GPIO);
+err_request_lcd:
+	gpio_free(VIPER_BCKLIGHT_EN_GPIO);
+err_request_bckl:
+	dev_err(dev, "Failed to setup LCD GPIOs\n");
+
+	return ret;
+}
+
+static int viper_backlight_notify(int brightness)
+{
+	gpio_set_value(VIPER_LCD_EN_GPIO, !!brightness);
+	gpio_set_value(VIPER_BCKLIGHT_EN_GPIO, !!brightness);
+
+	return brightness;
+}
+
+static void viper_backlight_exit(struct device *dev)
+{
+	gpio_free(VIPER_LCD_EN_GPIO);
+	gpio_free(VIPER_BCKLIGHT_EN_GPIO);
+}
+
+static struct platform_pwm_backlight_data viper_backlight_data = {
+	.pwm_id		= 0,
+	.max_brightness	= 100,
+	.dft_brightness	= 100,
+	.pwm_period_ns	= 1000000,
+	.init		= viper_backlight_init,
+	.notify		= viper_backlight_notify,
+	.exit		= viper_backlight_exit,
+};
+
+static struct platform_device viper_backlight_device = {
+	.name		= "pwm-backlight",
+	.dev		= {
+		.parent		= &pxa25x_device_pwm0.dev,
+		.platform_data	= &viper_backlight_data,
+	},
+};
+
+/* Ethernet */
+static struct resource smc91x_resources[] = {
+	[0] = {
+		.name	= "smc91x-regs",
+		.start  = VIPER_ETH_PHYS + 0x300,
+		.end    = VIPER_ETH_PHYS + 0x30f,
+		.flags  = IORESOURCE_MEM,
+	},
+	[1] = {
+		.start  = gpio_to_irq(VIPER_ETH_GPIO),
+		.end    = gpio_to_irq(VIPER_ETH_GPIO),
+		.flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
+	},
+	[2] = {
+		.name	= "smc91x-data32",
+		.start  = VIPER_ETH_DATA_PHYS,
+		.end    = VIPER_ETH_DATA_PHYS + 3,
+		.flags  = IORESOURCE_MEM,
+	},
+};
+
+static struct smc91x_platdata viper_smc91x_info = {
+	.flags	= SMC91X_USE_16BIT | SMC91X_NOWAIT,
+	.leda	= RPC_LED_100_10,
+	.ledb	= RPC_LED_TX_RX,
+};
+
+static struct platform_device smc91x_device = {
+	.name		= "smc91x",
+	.id		= -1,
+	.num_resources  = ARRAY_SIZE(smc91x_resources),
+	.resource       = smc91x_resources,
+	.dev		= {
+		.platform_data	= &viper_smc91x_info,
+	},
+};
+
+/* i2c */
+static struct i2c_gpio_platform_data i2c_bus_data = {
+	.sda_pin = VIPER_RTC_I2C_SDA_GPIO,
+	.scl_pin = VIPER_RTC_I2C_SCL_GPIO,
+	.udelay  = 10,
+	.timeout = 100,
+};
+
+static struct platform_device i2c_bus_device = {
+	.name		= "i2c-gpio",
+	.id		= 1, /* pxa2xx-i2c is bus 0, so start at 1 */
+	.dev = {
+		.platform_data = &i2c_bus_data,
+	}
+};
+
+static struct i2c_board_info __initdata viper_i2c_devices[] = {
+	{
+		I2C_BOARD_INFO("ds1338", 0x68),
+	},
+};
+
+/*
+ * Serial configuration:
+ * You can either have the standard PXA ports driven by the PXA driver,
+ * or all the ports (PXA + 16850) driven by the 8250 driver.
+ * Choose your poison.
+ */
+
+static struct resource viper_serial_resources[] = {
+#ifndef CONFIG_SERIAL_PXA
+	{
+		.start	= 0x40100000,
+		.end	= 0x4010001f,
+		.flags	= IORESOURCE_MEM,
+	},
+	{
+		.start	= 0x40200000,
+		.end	= 0x4020001f,
+		.flags	= IORESOURCE_MEM,
+	},
+	{
+		.start	= 0x40700000,
+		.end	= 0x4070001f,
+		.flags	= IORESOURCE_MEM,
+	},
+	{
+		.start	= VIPER_UARTA_PHYS,
+		.end	= VIPER_UARTA_PHYS + 0xf,
+		.flags	= IORESOURCE_MEM,
+	},
+	{
+		.start	= VIPER_UARTB_PHYS,
+		.end	= VIPER_UARTB_PHYS + 0xf,
+		.flags	= IORESOURCE_MEM,
+	},
+#else
+	{
+		0,
+	},
+#endif
+};
+
+static struct plat_serial8250_port serial_platform_data[] = {
+#ifndef CONFIG_SERIAL_PXA
+	/* Internal UARTs */
+	{
+		.membase	= (void *)&FFUART,
+		.mapbase	= __PREG(FFUART),
+		.irq		= IRQ_FFUART,
+		.uartclk	= 921600 * 16,
+		.regshift	= 2,
+		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
+		.iotype		= UPIO_MEM,
+	},
+	{
+		.membase	= (void *)&BTUART,
+		.mapbase	= __PREG(BTUART),
+		.irq		= IRQ_BTUART,
+		.uartclk	= 921600 * 16,
+		.regshift	= 2,
+		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
+		.iotype		= UPIO_MEM,
+	},
+	{
+		.membase	= (void *)&STUART,
+		.mapbase	= __PREG(STUART),
+		.irq		= IRQ_STUART,
+		.uartclk	= 921600 * 16,
+		.regshift	= 2,
+		.flags		= UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
+		.iotype		= UPIO_MEM,
+	},
+	/* External UARTs */
+	{
+		.mapbase	= VIPER_UARTA_PHYS,
+		.irq		= gpio_to_irq(VIPER_UARTA_GPIO),
+		.uartclk	= 1843200,
+		.regshift	= 1,
+		.iotype		= UPIO_MEM,
+		.flags		= UPF_BOOT_AUTOCONF | UPF_IOREMAP |
+				  UPF_SKIP_TEST,
+	},
+	{
+		.mapbase	= VIPER_UARTB_PHYS,
+		.irq		= gpio_to_irq(VIPER_UARTB_GPIO),
+		.uartclk	= 1843200,
+		.regshift	= 1,
+		.iotype		= UPIO_MEM,
+		.flags		= UPF_BOOT_AUTOCONF | UPF_IOREMAP |
+				  UPF_SKIP_TEST,
+	},
+#endif
+	{ },
+};
+
+static struct platform_device serial_device = {
+	.name			= "serial8250",
+	.id			= 0,
+	.dev			= {
+		.platform_data	= serial_platform_data,
+	},
+	.num_resources		= ARRAY_SIZE(viper_serial_resources),
+	.resource		= viper_serial_resources,
+};
+
+/* USB */
+static void isp116x_delay(struct device *dev, int delay)
+{
+	ndelay(delay);
+}
+
+static struct resource isp116x_resources[] = {
+	[0] = { /* DATA */
+		.start  = VIPER_USB_PHYS + 0,
+		.end    = VIPER_USB_PHYS + 1,
+		.flags  = IORESOURCE_MEM,
+	},
+	[1] = { /* ADDR */
+		.start  = VIPER_USB_PHYS + 2,
+		.end    = VIPER_USB_PHYS + 3,
+		.flags  = IORESOURCE_MEM,
+	},
+	[2] = {
+		.start  = gpio_to_irq(VIPER_USB_GPIO),
+		.end    = gpio_to_irq(VIPER_USB_GPIO),
+		.flags  = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
+	},
+};
+
+/* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */
+static struct isp116x_platform_data isp116x_platform_data = {
+	/* Enable internal resistors on downstream ports */
+	.sel15Kres		= 1,
+	/* On-chip overcurrent protection */
+	.oc_enable		= 1,
+	/* INT output polarity */
+	.int_act_high		= 1,
+	/* INT edge or level triggered */
+	.int_edge_triggered	= 0,
+
+	/* WAKEUP pin connected - NOT SUPPORTED  */
+	/* .remote_wakeup_connected = 0, */
+	/* Wakeup by devices on usb bus enabled */
+	.remote_wakeup_enable	= 0,
+	.delay			= isp116x_delay,
+};
+
+static struct platform_device isp116x_device = {
+	.name			= "isp116x-hcd",
+	.id			= -1,
+	.num_resources  	= ARRAY_SIZE(isp116x_resources),
+	.resource       	= isp116x_resources,
+	.dev			= {
+		.platform_data	= &isp116x_platform_data,
+	},
+
+};
+
+/* MTD */
+static struct resource mtd_resources[] = {
+	[0] = {	/* RedBoot config + filesystem flash */
+		.start	= VIPER_FLASH_PHYS,
+		.end	= VIPER_FLASH_PHYS + SZ_32M - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	[1] = {	/* Boot flash */
+		.start	= VIPER_BOOT_PHYS,
+		.end	= VIPER_BOOT_PHYS + SZ_1M - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+	[2] = { /*
+		 * SRAM size is actually 256KB, 8bits, with a sparse mapping
+		 * (each byte is on a 16bit boundary).
+		 */
+		.start	= _VIPER_SRAM_BASE,
+		.end	= _VIPER_SRAM_BASE + SZ_512K - 1,
+		.flags	= IORESOURCE_MEM,
+	},
+};
+
+static struct mtd_partition viper_boot_flash_partition = {
+	.name		= "RedBoot",
+	.size		= SZ_1M,
+	.offset		= 0,
+	.mask_flags	= MTD_WRITEABLE,	/* force R/O */
+};
+
+static struct physmap_flash_data viper_flash_data[] = {
+	[0] = {
+		.width		= 2,
+		.parts		= NULL,
+		.nr_parts	= 0,
+	},
+	[1] = {
+		.width		= 2,
+		.parts		= &viper_boot_flash_partition,
+		.nr_parts	= 1,
+	},
+};
+
+static struct platform_device viper_mtd_devices[] = {
+	[0] = {
+		.name		= "physmap-flash",
+		.id		= 0,
+		.dev		= {
+			.platform_data	= &viper_flash_data[0],
+		},
+		.resource	= &mtd_resources[0],
+		.num_resources	= 1,
+	},
+	[1] = {
+		.name		= "physmap-flash",
+		.id		= 1,
+		.dev		= {
+			.platform_data	= &viper_flash_data[1],
+		},
+		.resource	= &mtd_resources[1],
+		.num_resources	= 1,
+	},
+};
+
+static struct platform_device *viper_devs[] __initdata = {
+	&smc91x_device,
+	&i2c_bus_device,
+	&serial_device,
+	&isp116x_device,
+	&viper_mtd_devices[0],
+	&viper_mtd_devices[1],
+	&viper_backlight_device,
+};
+
+static mfp_cfg_t viper_pin_config[] __initdata = {
+	/* Chip selects */
+	GPIO15_nCS_1,
+	GPIO78_nCS_2,
+	GPIO79_nCS_3,
+	GPIO80_nCS_4,
+	GPIO33_nCS_5,
+
+	/* FP Backlight */
+	GPIO9_GPIO, 				/* VIPER_BCKLIGHT_EN_GPIO */
+	GPIO10_GPIO,				/* VIPER_LCD_EN_GPIO */
+	GPIO16_PWM0_OUT,
+
+	/* Ethernet PHY Ready */
+	GPIO18_RDY,
+
+	/* Serial shutdown */
+	GPIO12_GPIO | MFP_LPM_DRIVE_HIGH,	/* VIPER_UART_SHDN_GPIO */
+
+	/* Compact-Flash / PC104 */
+	GPIO48_nPOE,
+	GPIO49_nPWE,
+	GPIO50_nPIOR,
+	GPIO51_nPIOW,
+	GPIO52_nPCE_1,
+	GPIO53_nPCE_2,
+	GPIO54_nPSKTSEL,
+	GPIO55_nPREG,
+	GPIO56_nPWAIT,
+	GPIO57_nIOIS16,
+	GPIO8_GPIO,				/* VIPER_CF_RDY_GPIO */
+	GPIO32_GPIO,				/* VIPER_CF_CD_GPIO */
+	GPIO82_GPIO,				/* VIPER_CF_POWER_GPIO */
+
+	/* Integrated UPS control */
+	GPIO20_GPIO,				/* VIPER_UPS_GPIO */
+
+	/* Vcc regulator control */
+	GPIO6_GPIO,				/* VIPER_PSU_DATA_GPIO */
+	GPIO11_GPIO,				/* VIPER_PSU_CLK_GPIO */
+	GPIO19_GPIO,				/* VIPER_PSU_nCS_LD_GPIO */
+
+	/* i2c busses */
+	GPIO26_GPIO,				/* VIPER_TPM_I2C_SDA_GPIO */
+	GPIO27_GPIO,				/* VIPER_TPM_I2C_SCL_GPIO */
+	GPIO83_GPIO,				/* VIPER_RTC_I2C_SDA_GPIO */
+	GPIO84_GPIO,				/* VIPER_RTC_I2C_SCL_GPIO */
+
+	/* PC/104 Interrupt */
+	GPIO1_GPIO | WAKEUP_ON_EDGE_RISE,	/* VIPER_CPLD_GPIO */
+};
+
+static unsigned long viper_tpm;
+
+static int __init viper_tpm_setup(char *str)
+{
+	strict_strtoul(str, 10, &viper_tpm);
+	return 1;
+}
+
+__setup("tpm=", viper_tpm_setup);
+
+static void __init viper_tpm_init(void)
+{
+	struct platform_device *tpm_device;
+	struct i2c_gpio_platform_data i2c_tpm_data = {
+		.sda_pin = VIPER_TPM_I2C_SDA_GPIO,
+		.scl_pin = VIPER_TPM_I2C_SCL_GPIO,
+		.udelay  = 10,
+		.timeout = 100,
+	};
+	char *errstr;
+
+	/* Allocate TPM i2c bus if requested */
+	if (!viper_tpm)
+		return;
+
+	tpm_device = platform_device_alloc("i2c-gpio", 2);
+	if (tpm_device) {
+		if (!platform_device_add_data(tpm_device,
+					      &i2c_tpm_data,
+					      sizeof(i2c_tpm_data))) {
+			if (platform_device_add(tpm_device)) {
+				errstr = "register TPM i2c bus";
+				goto error_free_tpm;
+			}
+		} else {
+			errstr = "allocate TPM i2c bus data";
+			goto error_free_tpm;
+		}
+	} else {
+		errstr = "allocate TPM i2c device";
+		goto error_tpm;
+	}
+
+	return;
+
+error_free_tpm:
+	kfree(tpm_device);
+error_tpm:
+	pr_err("viper: Couldn't %s, giving up\n", errstr);
+}
+
+static void __init viper_init_vcore_gpios(void)
+{
+	if (gpio_request(VIPER_PSU_DATA_GPIO, "PSU data"))
+		goto err_request_data;
+
+	if (gpio_request(VIPER_PSU_CLK_GPIO, "PSU clock"))
+		goto err_request_clk;
+
+	if (gpio_request(VIPER_PSU_nCS_LD_GPIO, "PSU cs"))
+		goto err_request_cs;
+
+	if (gpio_direction_output(VIPER_PSU_DATA_GPIO, 0) ||
+	    gpio_direction_output(VIPER_PSU_CLK_GPIO, 0) ||
+	    gpio_direction_output(VIPER_PSU_nCS_LD_GPIO, 0))
+		goto err_dir;
+
+	/* c/should assume redboot set the correct level ??? */
+	viper_set_core_cpu_voltage(get_clk_frequency_khz(0), 1);
+
+	return;
+
+err_dir:
+	gpio_free(VIPER_PSU_nCS_LD_GPIO);
+err_request_cs:
+	gpio_free(VIPER_PSU_CLK_GPIO);
+err_request_clk:
+	gpio_free(VIPER_PSU_DATA_GPIO);
+err_request_data:
+	pr_err("viper: Failed to setup vcore control GPIOs\n");
+}
+
+static void __init viper_init_serial_gpio(void)
+{
+	if (gpio_request(VIPER_UART_SHDN_GPIO, "UARTs shutdown"))
+		goto err_request;
+
+	if (gpio_direction_output(VIPER_UART_SHDN_GPIO, 0))
+		goto err_dir;
+
+	return;
+
+err_dir:
+	gpio_free(VIPER_UART_SHDN_GPIO);
+err_request:
+	pr_err("viper: Failed to setup UART shutdown GPIO\n");
+}
+
+#ifdef CONFIG_CPU_FREQ
+static int viper_cpufreq_notifier(struct notifier_block *nb,
+				  unsigned long val, void *data)
+{
+	struct cpufreq_freqs *freq = data;
+
+	/* TODO: Adjust timings??? */
+
+	switch (val) {
+	case CPUFREQ_PRECHANGE:
+		if (freq->old < freq->new) {
+			/* we are getting faster so raise the voltage
+			 * before we change freq */
+			viper_set_core_cpu_voltage(freq->new, 0);
+		}
+		break;
+	case CPUFREQ_POSTCHANGE:
+		if (freq->old > freq->new) {
+			/* we are slowing down so drop the power
+			 * after we change freq */
+			viper_set_core_cpu_voltage(freq->new, 0);
+		}
+		break;
+	case CPUFREQ_RESUMECHANGE:
+		viper_set_core_cpu_voltage(freq->new, 0);
+		break;
+	default:
+		/* ignore */
+		break;
+	}
+
+	return 0;
+}
+
+static struct notifier_block viper_cpufreq_notifier_block = {
+	.notifier_call  = viper_cpufreq_notifier
+};
+
+static void __init viper_init_cpufreq(void)
+{
+	if (cpufreq_register_notifier(&viper_cpufreq_notifier_block,
+				      CPUFREQ_TRANSITION_NOTIFIER))
+		pr_err("viper: Failed to setup cpufreq notifier\n");
+}
+#else
+static inline void viper_init_cpufreq(void) {}
+#endif
+
+static void viper_power_off(void)
+{
+	pr_notice("Shutting off UPS\n");
+	gpio_set_value(VIPER_UPS_GPIO, 1);
+	/* Spin to death... */
+	while (1);
+}
+
+static void __init viper_init(void)
+{
+	u8 version;
+
+	pm_power_off = viper_power_off;
+
+	pxa2xx_mfp_config(ARRAY_AND_SIZE(viper_pin_config));
+
+	/* Wake-up serial console */
+	viper_init_serial_gpio();
+
+	set_pxa_fb_info(&fb_info);
+
+	/* v1 hardware cannot use the datacs line */
+	version = viper_hw_version();
+	if (version == 0)
+		smc91x_device.num_resources--;
+
+	pxa_set_i2c_info(NULL);
+	platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs));
+
+	viper_init_vcore_gpios();
+	viper_init_cpufreq();
+
+	sysdev_driver_register(&cpu_sysdev_class, &viper_cpu_sysdev_driver);
+
+	if (version) {
+		pr_info("viper: hardware v%di%d detected. "
+			"CPLD revision %d.\n",
+			VIPER_BOARD_VERSION(version),
+			VIPER_BOARD_ISSUE(version),
+			VIPER_CPLD_REVISION(version));
+		system_rev = (VIPER_BOARD_VERSION(version) << 8) |
+			     (VIPER_BOARD_ISSUE(version) << 4) |
+			     VIPER_CPLD_REVISION(version);
+	} else {
+		pr_info("viper: No version register.\n");
+	}
+
+	i2c_register_board_info(1, ARRAY_AND_SIZE(viper_i2c_devices));
+
+	viper_tpm_init();
+	pxa_set_ac97_info(NULL);
+}
+
+static struct map_desc viper_io_desc[] __initdata = {
+	{
+		.virtual = VIPER_CPLD_BASE,
+		.pfn     = __phys_to_pfn(VIPER_CPLD_PHYS),
+		.length  = 0x00300000,
+		.type    = MT_DEVICE,
+	},
+	{
+		.virtual = VIPER_PC104IO_BASE,
+		.pfn     = __phys_to_pfn(_PCMCIA1IO),
+		.length  = 0x00800000,
+		.type    = MT_DEVICE,
+	},
+};
+
+static void __init viper_map_io(void)
+{
+	pxa_map_io();
+
+	iotable_init(viper_io_desc, ARRAY_SIZE(viper_io_desc));
+
+	PCFR |= PCFR_OPDE;
+}
+
+MACHINE_START(VIPER, "Arcom/Eurotech VIPER SBC")
+	/* Maintainer: Marc Zyngier <maz@misterjones.org> */
+	.phys_io	= 0x40000000,
+	.io_pg_offst	= (io_p2v(0x40000000) >> 18) & 0xfffc,
+	.boot_params	= 0xa0000100,
+	.map_io		= viper_map_io,
+	.init_irq	= viper_init_irq,
+	.timer          = &pxa_timer,
+	.init_machine	= viper_init,
+MACHINE_END