Basic support for the Arcom/Eurotech Viper SBC.
Signed-off-by: Marc Zyngier <marc.zyngier@altran.com>
diff --git a/arch/arm/mach-pxa/viper.c b/arch/arm/mach-pxa/viper.c
new file mode 100644
index 0000000..d7632f6
--- /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