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Date: Wed, 6 Aug 2008 15:19:50 +0200
From: Marc Zyngier <maz@...terjones.org>
To: linux-kernel@...r.kernel.org
Cc: Amit Walambe <amit.walambe@...otech-ltd.co.uk>,
Dominik Brodowski <linux@...inikbrodowski.net>,
Marc Zyngier <maz@...terjones.org>,
Marc Zyngier <marc.zyngier@...ran.com>
Subject: [PATCH 1/5] Basic support for the Arcom/Eurotech Viper SBC.
Signed-off-by: Marc Zyngier <marc.zyngier@...ran.com>
---
arch/arm/mach-pxa/Kconfig | 6 +
arch/arm/mach-pxa/Makefile | 1 +
arch/arm/mach-pxa/viper.c | 952 ++++++++++++++++++++++++++++++++++++++
include/asm-arm/arch-pxa/irqs.h | 23 +
include/asm-arm/arch-pxa/viper.h | 91 ++++
5 files changed, 1073 insertions(+), 0 deletions(-)
create mode 100644 arch/arm/mach-pxa/viper.c
create mode 100644 include/asm-arm/arch-pxa/viper.h
diff --git a/arch/arm/mach-pxa/Kconfig b/arch/arm/mach-pxa/Kconfig
index e8ee7ec..31a554e 100644
--- a/arch/arm/mach-pxa/Kconfig
+++ b/arch/arm/mach-pxa/Kconfig
@@ -115,6 +115,12 @@ config MACH_TOSA
depends on PXA_SHARPSL
select PXA25x
+config ARCH_VIPER
+ bool "Arcom/Eurotech VIPER SBC"
+ select PXA25x
+ select ISA
+ select I2C_GPIO
+
config ARCH_PXA_ESERIES
bool "PXA based Toshiba e-series PDAs"
select PXA25x
diff --git a/arch/arm/mach-pxa/Makefile b/arch/arm/mach-pxa/Makefile
index 99ecbe7..c8a47cc 100644
--- a/arch/arm/mach-pxa/Makefile
+++ b/arch/arm/mach-pxa/Makefile
@@ -43,6 +43,7 @@ obj-$(CONFIG_MACH_E750) += e750_lcd.o
obj-$(CONFIG_MACH_E400) += e400_lcd.o
obj-$(CONFIG_MACH_E800) += e800_lcd.o
obj-$(CONFIG_MACH_PALMTX) += palmtx.o
+obj-$(CONFIG_ARCH_VIPER) += viper.o
ifeq ($(CONFIG_MACH_ZYLONITE),y)
obj-y += zylonite.o
diff --git a/arch/arm/mach-pxa/viper.c b/arch/arm/mach-pxa/viper.c
new file mode 100644
index 0000000..7c1d9a0
--- /dev/null
+++ b/arch/arm/mach-pxa/viper.c
@@ -0,0 +1,952 @@
+/*
+ * 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@...terjones.org>
+ * <marc.zyngier@...ran.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/usb/isp116x.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+
+#include <asm/arch/pxa-regs.h>
+#include <asm/arch/pxa2xx-regs.h>
+#include <asm/arch/bitfield.h>
+#include <asm/arch/audio.h>
+#include <asm/arch/pxafb.h>
+#include <asm/arch/mfp-pxa25x.h>
+#include <asm/arch/i2c.h>
+#include <asm/arch/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 <asm/mach/flash.h>
+
+#include "generic.h"
+
+#ifdef VIPER_DEBUG_INTR
+#define DEBUG_INTR(fmt...) printk(fmt)
+#else
+#define DEBUG_INTR(fmt...) do { } while (0)
+#endif
+
+#ifdef VIPER_DEBUG_VCORE
+#define DEBUG_VCORE(fmt...) printk(fmt)
+#else
+#define DEBUG_VCORE(fmt...) do { } while (0)
+#endif
+
+#define VIPER_ICR __VIPER_CPLD_REG(_VIPER_ICR_PHYS)
+
+static unsigned int icr;
+
+void viper_icr_set_bit(unsigned int bit)
+{
+ icr |= bit;
+ VIPER_ICR = icr;
+}
+EXPORT_SYMBOL(viper_icr_set_bit);
+
+void viper_icr_clear_bit(unsigned int bit)
+{
+ icr &= ~bit;
+ VIPER_ICR = icr;
+}
+EXPORT_SYMBOL(viper_icr_clear_bit);
+
+/*
+ * 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.
+ */
+#define VIPER_VERSION __VIPER_CPLD_REG(_VIPER_VERSION_PHYS)
+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;
+
+ if (v1 != v2) { /* a v1i6 board */
+ v1 = 0;
+ } else if (v1 /* ==v2 */ == 0xff) { /* a v1i6 board */
+ v1 = 0;
+ }
+
+ 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,
+};
+
+/* Interrupt handling */
+static unsigned long viper_irq_enabled_mask;
+
+static void viper_ack_irq(unsigned int irq)
+{
+ int viper_irq = (irq - VIPER_IRQ(0));
+
+ if (viper_irq < 8) {
+ DEBUG_INTR(KERN_DEBUG "viper_ack_irq: acknowledge lo irq %d "
+ "(number %d) with 0x%x => %p\n",
+ irq, viper_irq, 1 << viper_irq,
+ &VIPER_LO_IRQ_STATUS);
+ VIPER_LO_IRQ_STATUS = 1 << viper_irq;
+ } else {
+ DEBUG_INTR(KERN_DEBUG "viper_ack_irq: acknowledge hi irq %d "
+ "(number %d) with 0x%x => %p\n",
+ irq, viper_irq, 1 << (viper_irq - 8),
+ &VIPER_HI_IRQ_STATUS);
+ VIPER_HI_IRQ_STATUS = 1 << (viper_irq-8);
+ }
+}
+
+static void viper_mask_irq(unsigned int irq)
+{
+ int viper_irq = (irq - VIPER_IRQ(0));
+ viper_irq_enabled_mask &= ~(1 << viper_irq);
+}
+
+static void viper_unmask_irq(unsigned int irq)
+{
+ int viper_irq = (irq - VIPER_IRQ(0));
+ viper_irq_enabled_mask |= (1 << viper_irq);
+}
+
+static inline unsigned long viper_irq_pending(void)
+{
+ u8 hi, lo;
+ unsigned long result;
+
+ hi = VIPER_HI_IRQ_STATUS;
+ lo = VIPER_LO_IRQ_STATUS;
+ result = lo;
+ result |= hi<<8;
+ result &= viper_irq_enabled_mask;
+ return result;
+}
+
+static void viper_irq_handler(unsigned int irq, struct irq_desc *desc)
+{
+ unsigned long pending;
+
+ DEBUG_INTR(KERN_DEBUG "viper_irq_handler: entry\n");
+
+ pending = viper_irq_pending();
+ do {
+ DEBUG_INTR(KERN_DEBUG "viper_irq_handler: pending 0x%lx\n",
+ pending);
+ GEDR(VIPER_CPLD_GPIO) = GPIO_bit(VIPER_CPLD_GPIO);
+ if (likely(pending)) {
+ irq = VIPER_IRQ(0) + __ffs(pending);
+#ifdef VIPER_DEBUG_INTR
+ desc = irq_desc + irq;
+ DEBUG_INTR(KERN_DEBUG
+ "viper_irq_handler: dispatching IRQ %d to %p\n",
+ irq, desc->handle);
+#endif
+ generic_handle_irq(irq);
+ }
+ pending = viper_irq_pending();
+ } while (pending);
+ DEBUG_INTR(KERN_DEBUG "viper_irq_handler: exit\n");
+}
+
+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;
+ }
+
+ DEBUG_VCORE(KERN_INFO
+ "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);
+ if (step & i)
+ gpio_set_value(VIPER_PSU_DATA_GPIO, 1);
+ else
+ gpio_set_value(VIPER_PSU_DATA_GPIO, 0);
+ 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);
+}
+
+#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
+};
+#endif
+
+static void viper_init_cpufreq(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;
+
+ if (!cpufreq_register_notifier(&viper_cpufreq_notifier_block,
+ CPUFREQ_TRANSITION_NOTIFIER))
+ 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:
+ printk(KERN_ERR "viper: Failed to setup cpufreq\n");
+}
+
+static struct irq_chip viper_irq_chip = {
+ .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;
+
+ pxa25x_init_irq();
+
+ /* setup ISA IRQs */
+ for (irq = VIPER_IRQ(0); irq < VIPER_IRQ(0) + 11; irq++) {
+ printk(KERN_INFO "Map ISA IRQ %d to IRQ %d\n",
+ isa_irqs[irq - VIPER_IRQ(0)], irq);
+ set_irq_chip(irq, &viper_irq_chip);
+ set_irq_handler(irq, handle_edge_irq);
+ set_irq_flags(irq, IRQF_VALID | IRQF_PROBE);
+ }
+
+ set_irq_chained_handler(VIPER_CPLD_IRQ, viper_irq_handler);
+ set_irq_type(VIPER_CPLD_IRQ, IRQ_TYPE_EDGE_BOTH);
+
+ /* Peripheral IRQs
+ * Ethernet has been moved to resources */
+ set_irq_type(VIPER_USB_IRQ, IRQ_TYPE_EDGE_RISING);
+ set_irq_type(VIPER_UARTA_IRQ, IRQ_TYPE_EDGE_RISING);
+ set_irq_type(VIPER_UARTB_IRQ, IRQ_TYPE_EDGE_RISING);
+
+ /* GPIO9 and 10 control FB backlight. Initialise to off */
+ if (gpio_request(VIPER_BCKLIGHT_EN_GPIO, "Backlight"))
+ goto err_request_bckl;
+
+ if (gpio_request(VIPER_LCD_EN_GPIO, "LCD"))
+ goto err_request_lcd;
+
+ /* Setup Backlight control on PWM0 */
+ if (gpio_request(VIPER_PWM0_GPIO, "Backlight control"))
+ goto err_request_bc;
+
+ if (gpio_direction_output(VIPER_BCKLIGHT_EN_GPIO, 0) ||
+ gpio_direction_output(VIPER_LCD_EN_GPIO, 0) ||
+ gpio_direction_output(VIPER_PWM0_GPIO, 0))
+ goto err_dir;
+
+ PWM_CTRL1 = 4; /* 1 Msec. */
+
+ return;
+
+err_dir:
+ gpio_free(VIPER_PWM0_GPIO);
+err_request_bc:
+ gpio_free(VIPER_LCD_EN_GPIO);
+err_request_lcd:
+ gpio_free(VIPER_BCKLIGHT_EN_GPIO);
+err_request_bckl:
+ printk(KERN_ERR "viper: Failed to setup LCD GPIOs\n");
+}
+
+static void viper_power_off(void)
+{
+ printk(KERN_NOTICE "Shutting off UPS\n");
+ local_irq_disable();
+ gpio_set_value(VIPER_UPS_GPIO, 1);
+ while (1) {
+ /*
+ * Spin
+ */
+ }
+}
+
+/* Audio */
+static struct platform_device audio_device = {
+ .name = "pxa2xx-ac97",
+ .id = -1,
+};
+
+/* Flat Panel */
+static void viper_lcd_power(int on, struct fb_var_screeninfo *var)
+{
+ /* fb_var_screeninfo is currently unused */
+ if (on)
+ gpio_set_value(VIPER_LCD_EN_GPIO, 1);
+ else
+ gpio_set_value(VIPER_LCD_EN_GPIO, 0);
+}
+
+static void viper_backlight_power(int on)
+{
+ if (on) {
+ gpio_set_value(VIPER_BCKLIGHT_EN_GPIO, 1);
+ /* Set full brightness */
+ gpio_set_value(VIPER_PWM0_GPIO, 0);
+ } else {
+ gpio_set_value(VIPER_BCKLIGHT_EN_GPIO, 0);
+ gpio_set_value(VIPER_PWM0_GPIO, 1);
+ }
+}
+
+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 = 1,
+ .lower_margin = 1,
+
+ .sync = 0,
+};
+
+static struct pxafb_mach_info fb_info = {
+ .modes = &fb_mode_info,
+ .num_modes = 1,
+ .lccr0 = LCCR0_Act | LCCR0_Color,
+ .lccr3 = LCCR3_OutEnH | LCCR3_PixFlEdg | LCCR3_Acb(0xFF),
+
+ .pxafb_lcd_power = viper_lcd_power,
+ .pxafb_backlight_power = viper_backlight_power,
+};
+
+/* 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 = VIPER_ETH_IRQ,
+ .end = VIPER_ETH_IRQ,
+ .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,
+};
+
+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 */
+static struct resource viper_serial_resources[] = {
+ {
+ .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,
+ },
+};
+
+static struct plat_serial8250_port serial_platform_data[] = {
+ /* 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 = VIPER_UARTA_IRQ,
+ .uartclk = 1843200,
+ .regshift = 1,
+ .iotype = UPIO_MEM,
+ .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
+ UPF_SKIP_TEST,
+ },
+ {
+ .mapbase = VIPER_UARTB_PHYS,
+ .irq = VIPER_UARTB_IRQ,
+ .uartclk = 1843200,
+ .regshift = 1,
+ .iotype = UPIO_MEM,
+ .flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
+ UPF_SKIP_TEST,
+ },
+ { },
+};
+
+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)
+{
+ /* On this platform, we work with 200MHz clock, giving
+ 5 ns per instruction. The cycle below involves 2
+ instructions and we lose 2 more instruction times due
+ to pipeline flush at a jump. I.e., we consume 20 ns
+ per cycle.
+ */
+ int cyc = delay/20 + 1;
+ cyc <<= 2; /* actually, 400MHz */
+
+ __asm__ volatile ("0:\n"
+ " subs %0, %1, #1\n"
+ " bge 0b\n"
+ : "=r" (cyc)
+ : "0" (cyc)
+ );
+}
+
+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 = VIPER_USB_IRQ,
+ .end = VIPER_USB_IRQ,
+ .flags = IORESOURCE_IRQ,
+ },
+};
+
+/* (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,
+ },
+
+};
+
+static struct resource sram_resource = {
+ .start = _VIPER_SRAM_BASE,
+ .end = _VIPER_SRAM_BASE + SZ_256K - 1,
+ .flags = IORESOURCE_MEM,
+};
+
+static struct platform_device sram_device = {
+ .name = "pxa2xx-8bit-sram",
+ .id = 0,
+ .num_resources = 1,
+ .resource = &sram_resource,
+};
+
+static struct resource flash_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,
+ },
+};
+
+static struct mtd_partition viper_boot_flash_partition = {
+ .name = "RedBoot",
+ .size = SZ_1M,
+ .offset = 0,
+ .mask_flags = MTD_WRITEABLE, /* force R/O */
+};
+
+static struct flash_platform_data viper_flash_data[] = {
+ [0] = {
+ .name = "ViperFlash",
+ .map_name = "cfi_probe",
+ .width = 2,
+ .parts = NULL,
+ .nr_parts = 0,
+ },
+ [1] = {
+ .name = "ViperBootFlash",
+ .map_name = "jedec_probe",
+ .width = 2,
+ .parts = &viper_boot_flash_partition,
+ .nr_parts = 1,
+ },
+};
+
+static struct platform_device viper_flash_devices[] = {
+ {
+ .name = "pxa2xx-flash",
+ .id = 0,
+ .dev = {
+ .platform_data = &viper_flash_data[0],
+ },
+ .resource = &flash_resources[0],
+ .num_resources = 1,
+ },
+ {
+ .name = "pxa2xx-flash",
+ .id = 1,
+ .dev = {
+ .platform_data = &viper_flash_data[1],
+ },
+ .resource = &flash_resources[1],
+ .num_resources = 1,
+ },
+};
+
+static struct platform_device *viper_devs[] __initdata = {
+ &smc91x_device,
+ &i2c_bus_device,
+ &serial_device,
+ &isp116x_device,
+ &audio_device,
+ &sram_device,
+ &viper_flash_devices[0],
+ &viper_flash_devices[1],
+};
+
+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 */
+ VIPER_BCKLIGHT_EN_GPIO | MFP_DIR_OUT,
+ VIPER_LCD_EN_GPIO | MFP_DIR_OUT,
+ VIPER_PWM0_GPIO | MFP_DIR_OUT,
+
+ /* Compact-Flash / PC104 */
+ VIPER_CF_POWER_GPIO | MFP_DIR_OUT,
+ VIPER_CF_CD_GPIO,
+ VIPER_CF_RDY_GPIO,
+
+ /* Integrated UPS control */
+ VIPER_UPS_GPIO | MFP_DIR_OUT,
+
+ /* Vcc regulator control */
+ VIPER_PSU_DATA_GPIO | MFP_DIR_OUT,
+ VIPER_PSU_CLK_GPIO | MFP_DIR_OUT,
+ VIPER_PSU_nCS_LD_GPIO | MFP_DIR_OUT,
+
+ /* i2c busses */
+ VIPER_TPM_I2C_SDA_GPIO,
+ VIPER_TPM_I2C_SCL_GPIO | MFP_DIR_OUT,
+ VIPER_RTC_I2C_SDA_GPIO,
+ VIPER_RTC_I2C_SCL_GPIO | MFP_DIR_OUT,
+};
+
+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_init(void)
+{
+ u8 version;
+
+ pm_power_off = viper_power_off;
+
+ pxa2xx_mfp_config(ARRAY_AND_SIZE(viper_pin_config));
+
+ 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_cpufreq();
+ /* c/should assume redboot set the correct level ??? */
+ viper_set_core_cpu_voltage(get_clk_frequency_khz(0), 1);
+
+ sysdev_driver_register(&cpu_sysdev_class, &viper_cpu_sysdev_driver);
+
+ if (version) {
+ printk(KERN_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 {
+ printk(KERN_INFO "viper: No version register.\n");
+ }
+
+ i2c_register_board_info(1, viper_i2c_devices,
+ ARRAY_SIZE(viper_i2c_devices));
+
+ /* Allocate TPM i2c bus if requested */
+ if (viper_tpm) {
+ 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;
+
+ 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;
+ }
+
+ goto no_error_tpm;
+ }
+
+ errstr = "allocate TPM i2c device";
+ goto error_tpm;
+
+error_free_tpm:
+ kfree(tpm_device);
+error_tpm:
+ printk(KERN_ERR "viper: Couldn't %s, giving up\n", errstr);
+ }
+
+no_error_tpm:
+
+ return;
+}
+
+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));
+
+ /* setup sleep mode values */
+ /* FIXME : to be removed once completly converted to mfp */
+ PWER = 0x00000002;
+ PFER = 0x00000000;
+ PRER = 0x00000002;
+ PGSR0 = 0x00008000;
+ PGSR1 = 0x003F0202;
+ PGSR2 = 0x0001C000;
+ PCFR |= PCFR_OPDE;
+}
+
+MACHINE_START(VIPER, "Arcom/Eurotech VIPER SBC")
+ /* Maintainer: Arcom Control Systems Ltd. */
+ .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
diff --git a/include/asm-arm/arch-pxa/irqs.h b/include/asm-arm/arch-pxa/irqs.h
index 9413121..583c300 100644
--- a/include/asm-arm/arch-pxa/irqs.h
+++ b/include/asm-arm/arch-pxa/irqs.h
@@ -179,6 +179,7 @@
#elif defined(CONFIG_SHARP_LOCOMO)
#define NR_IRQS (IRQ_LOCOMO_SPI_TEND + 1)
#elif defined(CONFIG_ARCH_LUBBOCK) || \
+ defined(CONFIG_ARCH_VIPER) || \
defined(CONFIG_MACH_LOGICPD_PXA270) || \
defined(CONFIG_MACH_TOSA) || \
defined(CONFIG_MACH_MAINSTONE) || \
@@ -232,6 +233,28 @@
#define IRQ_LOCOMO_LT_BASE (IRQ_BOARD_START + 2)
#define IRQ_LOCOMO_SPI_BASE (IRQ_BOARD_START + 3)
+/* ARCOM VIPER */
+#define VIPER_ETH_IRQ IRQ_GPIO(VIPER_ETH_GPIO)
+#define VIPER_CPLD_IRQ IRQ_GPIO(VIPER_CPLD_GPIO)
+#define VIPER_USB_IRQ IRQ_GPIO(VIPER_USB_GPIO)
+
+#define VIPER_UARTA_IRQ IRQ_GPIO(VIPER_UARTA_GPIO)
+#define VIPER_UARTB_IRQ IRQ_GPIO(VIPER_UARTB_GPIO)
+
+#define VIPER_CF_CD_IRQ IRQ_GPIO(VIPER_CF_CD_GPIO)
+#define VIPER_CF_RDY_IRQ IRQ_GPIO(VIPER_CF_RDY_GPIO)
+
+#define VIPER_IRQ(x) (IRQ_BOARD_START + (x))
+
+#define VIPER_ISA_IRQ3 VIPER_IRQ(0)
+#define VIPER_ISA_IRQ4 VIPER_IRQ(1)
+#define VIPER_ISA_IRQ5 VIPER_IRQ(2)
+#define VIPER_ISA_IRQ6 VIPER_IRQ(3)
+#define VIPER_ISA_IRQ7 VIPER_IRQ(4)
+#define VIPER_ISA_IRQ10 VIPER_IRQ(5)
+#define VIPER_ISA_IRQ11 VIPER_IRQ(6)
+#define VIPER_ISA_IRQ14 VIPER_IRQ(7)
+
/* phyCORE-PXA270 (PCM027) Interrupts */
#define PCM027_IRQ(x) (IRQ_BOARD_START + (x))
#define PCM027_BTDET_IRQ PCM027_IRQ(0)
diff --git a/include/asm-arm/arch-pxa/viper.h b/include/asm-arm/arch-pxa/viper.h
new file mode 100644
index 0000000..f8b3630
--- /dev/null
+++ b/include/asm-arm/arch-pxa/viper.h
@@ -0,0 +1,91 @@
+/*
+ * linux/include/asm-arm/arch-pxa/viper.h
+ *
+ * Author: Ian Campbell
+ * Created: Feb 03, 2003
+ * Copyright: Arcom Control Systems.
+ *
+ * Created based on lubbock.h:
+ * 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.
+ */
+
+#ifndef ARCH_VIPER_H
+#define ARCH_VIPER_H
+
+#define VIPER_BOOT_PHYS PXA_CS0_PHYS
+#define VIPER_FLASH_PHYS PXA_CS1_PHYS
+#define VIPER_ETH_PHYS PXA_CS2_PHYS
+#define VIPER_USB_PHYS PXA_CS3_PHYS
+#define VIPER_ETH_DATA_PHYS PXA_CS4_PHYS
+#define VIPER_CPLD_PHYS PXA_CS5_PHYS
+
+#define VIPER_CPLD_BASE (0xf0000000)
+#define VIPER_PC104IO_BASE (0xf1000000)
+#define VIPER_USB_BASE (0xf1800000)
+
+#define VIPER_ETH_GPIO (0)
+#define VIPER_CPLD_GPIO (1)
+#define VIPER_USB_GPIO (2)
+#define VIPER_UARTA_GPIO (4)
+#define VIPER_UARTB_GPIO (3)
+#define VIPER_CF_CD_GPIO (32)
+#define VIPER_CF_RDY_GPIO (8)
+#define VIPER_BCKLIGHT_EN_GPIO (9)
+#define VIPER_LCD_EN_GPIO (10)
+#define VIPER_PSU_DATA_GPIO (6)
+#define VIPER_PSU_CLK_GPIO (11)
+#define VIPER_PWM0_GPIO (16)
+#define VIPER_PSU_nCS_LD_GPIO (19)
+#define VIPER_UPS_GPIO (20)
+#define VIPER_CF_POWER_GPIO (82)
+#define VIPER_TPM_I2C_SDA_GPIO (26)
+#define VIPER_TPM_I2C_SCL_GPIO (27)
+#define VIPER_RTC_I2C_SDA_GPIO (83)
+#define VIPER_RTC_I2C_SCL_GPIO (84)
+
+#define VIPER_CPLD_P2V(x) ((x) - VIPER_CPLD_PHYS + VIPER_CPLD_BASE)
+#define VIPER_CPLD_V2P(x) ((x) - VIPER_CPLD_BASE + VIPER_CPLD_PHYS)
+
+#ifndef __ASSEMBLY__
+# define __VIPER_CPLD_REG(x) (*((volatile u16 *)VIPER_CPLD_P2V(x)))
+#endif
+
+/* board level registers in the CPLD: (offsets from CPLD_BASE) ... */
+
+/* ... Physical addresses */
+#define _VIPER_LO_IRQ_STATUS (VIPER_CPLD_PHYS + 0x100000)
+#define _VIPER_ICR_PHYS (VIPER_CPLD_PHYS + 0x100002)
+#define _VIPER_HI_IRQ_STATUS (VIPER_CPLD_PHYS + 0x100004)
+#define _VIPER_VERSION_PHYS (VIPER_CPLD_PHYS + 0x100006)
+#define VIPER_UARTA_PHYS (VIPER_CPLD_PHYS + 0x300010)
+#define VIPER_UARTB_PHYS (VIPER_CPLD_PHYS + 0x300000)
+#define _VIPER_SRAM_BASE (VIPER_CPLD_PHYS + 0x800000)
+
+/* ... Virtual addresses */
+#define VIPER_LO_IRQ_STATUS __VIPER_CPLD_REG(_VIPER_LO_IRQ_STATUS)
+#define VIPER_HI_IRQ_STATUS __VIPER_CPLD_REG(_VIPER_HI_IRQ_STATUS)
+
+/* Decode VIPER_VERSION register */
+#define VIPER_CPLD_REVISION(x) (((x) >> 5) & 0x7)
+#define VIPER_BOARD_VERSION(x) (((x) >> 3) & 0x3)
+#define VIPER_BOARD_ISSUE(x) (((x) >> 0) & 0x7)
+
+/* Interrupt and Configuration Register (VIPER_ICR) */
+/* This is a write only register. Only CF_RST is used under Linux */
+
+extern void viper_icr_set_bit(unsigned int bit);
+extern void viper_icr_clear_bit(unsigned int bit);
+
+#define VIPER_ICR_RETRIG (1 << 0)
+#define VIPER_ICR_AUTO_CLR (1 << 1)
+#define VIPER_ICR_R_DIS (1 << 2)
+#define VIPER_ICR_CF_RST (1 << 3)
+
+#endif
+
--
1.5.4.3
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