![Eric Miao](/assets/img/avatar_default.png)
Move the processor specific initialization (largely resources initialization) out of soc_common_drv_pcmcia_probe() into dedicated sa11xx_drv_pcmcia_probe() and __pxa2xx_drv_pcmcia_probe(). By doing this, we are now able to move the PCMCIA related definitions out of pxa-regs.h and back into pxa2xx_base.c. As a result, remove that reference of _PCMCIA1IO in arch/arm/mach-pxa/viper.c. Signed-off-by: Eric Miao <eric.miao@marvell.com>
981 lines
22 KiB
C
981 lines
22 KiB
C
/*
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* linux/arch/arm/mach-pxa/viper.c
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*
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* Support for the Arcom VIPER SBC.
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*
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* Author: Ian Campbell
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* Created: Feb 03, 2003
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* Copyright: Arcom Control Systems
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*
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* Maintained by Marc Zyngier <maz@misterjones.org>
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* <marc.zyngier@altran.com>
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*
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* Based on lubbock.c:
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* Author: Nicolas Pitre
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* Created: Jun 15, 2001
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* Copyright: MontaVista Software Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/types.h>
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#include <linux/memory.h>
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#include <linux/cpu.h>
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#include <linux/cpufreq.h>
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#include <linux/delay.h>
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#include <linux/fs.h>
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#include <linux/init.h>
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#include <linux/interrupt.h>
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#include <linux/major.h>
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#include <linux/module.h>
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#include <linux/pm.h>
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#include <linux/sched.h>
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#include <linux/gpio.h>
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#include <linux/i2c-gpio.h>
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#include <linux/serial_8250.h>
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#include <linux/smc91x.h>
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#include <linux/pwm_backlight.h>
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#include <linux/usb/isp116x.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/partitions.h>
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#include <linux/mtd/physmap.h>
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#include <mach/pxa25x.h>
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#include <mach/audio.h>
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#include <mach/pxafb.h>
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#include <mach/i2c.h>
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#include <mach/viper.h>
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#include <asm/setup.h>
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#include <asm/mach-types.h>
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#include <asm/irq.h>
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#include <asm/sizes.h>
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#include <asm/mach/arch.h>
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#include <asm/mach/map.h>
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#include <asm/mach/irq.h>
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#include "generic.h"
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#include "devices.h"
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static unsigned int icr;
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static void viper_icr_set_bit(unsigned int bit)
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{
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icr |= bit;
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VIPER_ICR = icr;
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}
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static void viper_icr_clear_bit(unsigned int bit)
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{
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icr &= ~bit;
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VIPER_ICR = icr;
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}
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/* This function is used from the pcmcia module to reset the CF */
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void viper_cf_rst(int state)
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{
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if (state)
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viper_icr_set_bit(VIPER_ICR_CF_RST);
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else
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viper_icr_clear_bit(VIPER_ICR_CF_RST);
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}
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EXPORT_SYMBOL(viper_cf_rst);
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/*
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* The CPLD version register was not present on VIPER boards prior to
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* v2i1. On v1 boards where the version register is not present we
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* will just read back the previous value from the databus.
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*
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* Therefore we do two reads. The first time we write 0 to the
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* (read-only) register before reading and the second time we write
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* 0xff first. If the two reads do not match or they read back as 0xff
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* or 0x00 then we have version 1 hardware.
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*/
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static u8 viper_hw_version(void)
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{
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u8 v1, v2;
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unsigned long flags;
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local_irq_save(flags);
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VIPER_VERSION = 0;
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v1 = VIPER_VERSION;
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VIPER_VERSION = 0xff;
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v2 = VIPER_VERSION;
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v1 = (v1 != v2 || v1 == 0xff) ? 0 : v1;
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local_irq_restore(flags);
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return v1;
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}
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/* CPU sysdev */
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static int viper_cpu_suspend(struct sys_device *sysdev, pm_message_t state)
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{
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viper_icr_set_bit(VIPER_ICR_R_DIS);
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return 0;
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}
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static int viper_cpu_resume(struct sys_device *sysdev)
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{
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viper_icr_clear_bit(VIPER_ICR_R_DIS);
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return 0;
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}
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static struct sysdev_driver viper_cpu_sysdev_driver = {
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.suspend = viper_cpu_suspend,
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.resume = viper_cpu_resume,
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};
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static unsigned int current_voltage_divisor;
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/*
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* If force is not true then step from existing to new divisor. If
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* force is true then jump straight to the new divisor. Stepping is
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* used because if the jump in voltage is too large, the VCC can dip
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* too low and the regulator cuts out.
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*
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* force can be used to initialize the divisor to a know state by
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* setting the value for the current clock speed, since we are already
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* running at that speed we know the voltage should be pretty close so
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* the jump won't be too large
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*/
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static void viper_set_core_cpu_voltage(unsigned long khz, int force)
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{
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int i = 0;
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unsigned int divisor = 0;
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const char *v;
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if (khz < 200000) {
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v = "1.0"; divisor = 0xfff;
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} else if (khz < 300000) {
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v = "1.1"; divisor = 0xde5;
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} else {
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v = "1.3"; divisor = 0x325;
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}
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pr_debug("viper: setting CPU core voltage to %sV at %d.%03dMHz\n",
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v, (int)khz / 1000, (int)khz % 1000);
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#define STEP 0x100
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do {
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int step;
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if (force)
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step = divisor;
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else if (current_voltage_divisor < divisor - STEP)
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step = current_voltage_divisor + STEP;
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else if (current_voltage_divisor > divisor + STEP)
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step = current_voltage_divisor - STEP;
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else
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step = divisor;
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force = 0;
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gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
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gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
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for (i = 1 << 11 ; i > 0 ; i >>= 1) {
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udelay(1);
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gpio_set_value(VIPER_PSU_DATA_GPIO, step & i);
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udelay(1);
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gpio_set_value(VIPER_PSU_CLK_GPIO, 1);
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udelay(1);
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gpio_set_value(VIPER_PSU_CLK_GPIO, 0);
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}
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udelay(1);
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gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 1);
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udelay(1);
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gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0);
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current_voltage_divisor = step;
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} while (current_voltage_divisor != divisor);
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}
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/* Interrupt handling */
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static unsigned long viper_irq_enabled_mask;
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static const int viper_isa_irqs[] = { 3, 4, 5, 6, 7, 10, 11, 12, 9, 14, 15 };
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static const int viper_isa_irq_map[] = {
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0, /* ISA irq #0, invalid */
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0, /* ISA irq #1, invalid */
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0, /* ISA irq #2, invalid */
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1 << 0, /* ISA irq #3 */
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1 << 1, /* ISA irq #4 */
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1 << 2, /* ISA irq #5 */
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1 << 3, /* ISA irq #6 */
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1 << 4, /* ISA irq #7 */
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0, /* ISA irq #8, invalid */
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1 << 8, /* ISA irq #9 */
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1 << 5, /* ISA irq #10 */
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1 << 6, /* ISA irq #11 */
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1 << 7, /* ISA irq #12 */
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0, /* ISA irq #13, invalid */
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1 << 9, /* ISA irq #14 */
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1 << 10, /* ISA irq #15 */
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};
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static inline int viper_irq_to_bitmask(unsigned int irq)
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{
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return viper_isa_irq_map[irq - PXA_ISA_IRQ(0)];
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}
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static inline int viper_bit_to_irq(int bit)
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{
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return viper_isa_irqs[bit] + PXA_ISA_IRQ(0);
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}
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static void viper_ack_irq(unsigned int irq)
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{
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int viper_irq = viper_irq_to_bitmask(irq);
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if (viper_irq & 0xff)
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VIPER_LO_IRQ_STATUS = viper_irq;
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else
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VIPER_HI_IRQ_STATUS = (viper_irq >> 8);
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}
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static void viper_mask_irq(unsigned int irq)
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{
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viper_irq_enabled_mask &= ~(viper_irq_to_bitmask(irq));
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}
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static void viper_unmask_irq(unsigned int irq)
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{
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viper_irq_enabled_mask |= viper_irq_to_bitmask(irq);
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}
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static inline unsigned long viper_irq_pending(void)
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{
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return (VIPER_HI_IRQ_STATUS << 8 | VIPER_LO_IRQ_STATUS) &
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viper_irq_enabled_mask;
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}
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static void viper_irq_handler(unsigned int irq, struct irq_desc *desc)
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{
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unsigned long pending;
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pending = viper_irq_pending();
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do {
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/* we're in a chained irq handler,
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* so ack the interrupt by hand */
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GEDR(VIPER_CPLD_GPIO) = GPIO_bit(VIPER_CPLD_GPIO);
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if (likely(pending)) {
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irq = viper_bit_to_irq(__ffs(pending));
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generic_handle_irq(irq);
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}
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pending = viper_irq_pending();
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} while (pending);
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}
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static struct irq_chip viper_irq_chip = {
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.name = "ISA",
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.ack = viper_ack_irq,
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.mask = viper_mask_irq,
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.unmask = viper_unmask_irq
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};
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static void __init viper_init_irq(void)
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{
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int level;
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int isa_irq;
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pxa25x_init_irq();
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/* setup ISA IRQs */
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for (level = 0; level < ARRAY_SIZE(viper_isa_irqs); level++) {
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isa_irq = viper_bit_to_irq(level);
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set_irq_chip(isa_irq, &viper_irq_chip);
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set_irq_handler(isa_irq, handle_edge_irq);
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set_irq_flags(isa_irq, IRQF_VALID | IRQF_PROBE);
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}
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set_irq_chained_handler(gpio_to_irq(VIPER_CPLD_GPIO),
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viper_irq_handler);
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set_irq_type(gpio_to_irq(VIPER_CPLD_GPIO), IRQ_TYPE_EDGE_BOTH);
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#ifndef CONFIG_SERIAL_PXA
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/*
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* 8250 doesn't support IRQ_TYPE being passed as part
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* of the plat_serial8250_port structure...
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*/
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set_irq_type(gpio_to_irq(VIPER_UARTA_GPIO), IRQ_TYPE_EDGE_RISING);
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set_irq_type(gpio_to_irq(VIPER_UARTB_GPIO), IRQ_TYPE_EDGE_RISING);
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#endif
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}
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/* Flat Panel */
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static struct pxafb_mode_info fb_mode_info[] = {
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{
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.pixclock = 157500,
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.xres = 320,
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.yres = 240,
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.bpp = 16,
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.hsync_len = 63,
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.left_margin = 7,
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.right_margin = 13,
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.vsync_len = 20,
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.upper_margin = 0,
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.lower_margin = 0,
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.sync = 0,
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},
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};
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static struct pxafb_mach_info fb_info = {
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.modes = fb_mode_info,
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.num_modes = 1,
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.lcd_conn = LCD_COLOR_TFT_16BPP | LCD_PCLK_EDGE_FALL,
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};
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static int viper_backlight_init(struct device *dev)
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{
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int ret;
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/* GPIO9 and 10 control FB backlight. Initialise to off */
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ret = gpio_request(VIPER_BCKLIGHT_EN_GPIO, "Backlight");
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if (ret)
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goto err_request_bckl;
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ret = gpio_request(VIPER_LCD_EN_GPIO, "LCD");
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if (ret)
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goto err_request_lcd;
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ret = gpio_direction_output(VIPER_BCKLIGHT_EN_GPIO, 0);
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if (ret)
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goto err_dir;
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ret = gpio_direction_output(VIPER_LCD_EN_GPIO, 0);
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if (ret)
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goto err_dir;
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return 0;
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err_dir:
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gpio_free(VIPER_LCD_EN_GPIO);
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err_request_lcd:
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gpio_free(VIPER_BCKLIGHT_EN_GPIO);
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err_request_bckl:
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dev_err(dev, "Failed to setup LCD GPIOs\n");
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return ret;
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}
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static int viper_backlight_notify(int brightness)
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{
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gpio_set_value(VIPER_LCD_EN_GPIO, !!brightness);
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gpio_set_value(VIPER_BCKLIGHT_EN_GPIO, !!brightness);
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return brightness;
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}
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static void viper_backlight_exit(struct device *dev)
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{
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gpio_free(VIPER_LCD_EN_GPIO);
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gpio_free(VIPER_BCKLIGHT_EN_GPIO);
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}
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static struct platform_pwm_backlight_data viper_backlight_data = {
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.pwm_id = 0,
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.max_brightness = 100,
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.dft_brightness = 100,
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.pwm_period_ns = 1000000,
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.init = viper_backlight_init,
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.notify = viper_backlight_notify,
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.exit = viper_backlight_exit,
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};
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static struct platform_device viper_backlight_device = {
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.name = "pwm-backlight",
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.dev = {
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.parent = &pxa25x_device_pwm0.dev,
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.platform_data = &viper_backlight_data,
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},
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};
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/* Ethernet */
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static struct resource smc91x_resources[] = {
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[0] = {
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.name = "smc91x-regs",
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.start = VIPER_ETH_PHYS + 0x300,
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.end = VIPER_ETH_PHYS + 0x30f,
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.flags = IORESOURCE_MEM,
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},
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[1] = {
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.start = gpio_to_irq(VIPER_ETH_GPIO),
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.end = gpio_to_irq(VIPER_ETH_GPIO),
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.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
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},
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[2] = {
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.name = "smc91x-data32",
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.start = VIPER_ETH_DATA_PHYS,
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.end = VIPER_ETH_DATA_PHYS + 3,
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.flags = IORESOURCE_MEM,
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},
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};
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static struct smc91x_platdata viper_smc91x_info = {
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.flags = SMC91X_USE_16BIT | SMC91X_NOWAIT,
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.leda = RPC_LED_100_10,
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.ledb = RPC_LED_TX_RX,
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};
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static struct platform_device smc91x_device = {
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.name = "smc91x",
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.id = -1,
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.num_resources = ARRAY_SIZE(smc91x_resources),
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.resource = smc91x_resources,
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.dev = {
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.platform_data = &viper_smc91x_info,
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},
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};
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/* i2c */
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static struct i2c_gpio_platform_data i2c_bus_data = {
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.sda_pin = VIPER_RTC_I2C_SDA_GPIO,
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.scl_pin = VIPER_RTC_I2C_SCL_GPIO,
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.udelay = 10,
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.timeout = 100,
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};
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static struct platform_device i2c_bus_device = {
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.name = "i2c-gpio",
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.id = 1, /* pxa2xx-i2c is bus 0, so start at 1 */
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.dev = {
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.platform_data = &i2c_bus_data,
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}
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};
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static struct i2c_board_info __initdata viper_i2c_devices[] = {
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{
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I2C_BOARD_INFO("ds1338", 0x68),
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},
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};
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/*
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* Serial configuration:
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* You can either have the standard PXA ports driven by the PXA driver,
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* or all the ports (PXA + 16850) driven by the 8250 driver.
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* Choose your poison.
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*/
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static struct resource viper_serial_resources[] = {
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#ifndef CONFIG_SERIAL_PXA
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{
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.start = 0x40100000,
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.end = 0x4010001f,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = 0x40200000,
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.end = 0x4020001f,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = 0x40700000,
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.end = 0x4070001f,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = VIPER_UARTA_PHYS,
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.end = VIPER_UARTA_PHYS + 0xf,
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.flags = IORESOURCE_MEM,
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},
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{
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.start = VIPER_UARTB_PHYS,
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.end = VIPER_UARTB_PHYS + 0xf,
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.flags = IORESOURCE_MEM,
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},
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#else
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{
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0,
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},
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#endif
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};
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static struct plat_serial8250_port serial_platform_data[] = {
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#ifndef CONFIG_SERIAL_PXA
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/* Internal UARTs */
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{
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.membase = (void *)&FFUART,
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.mapbase = __PREG(FFUART),
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.irq = IRQ_FFUART,
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.uartclk = 921600 * 16,
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.regshift = 2,
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.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
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.iotype = UPIO_MEM,
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},
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{
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.membase = (void *)&BTUART,
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.mapbase = __PREG(BTUART),
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.irq = IRQ_BTUART,
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.uartclk = 921600 * 16,
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.regshift = 2,
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.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
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.iotype = UPIO_MEM,
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},
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{
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.membase = (void *)&STUART,
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.mapbase = __PREG(STUART),
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.irq = IRQ_STUART,
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.uartclk = 921600 * 16,
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.regshift = 2,
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.flags = UPF_BOOT_AUTOCONF | UPF_SKIP_TEST,
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.iotype = UPIO_MEM,
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},
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/* External UARTs */
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{
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.mapbase = VIPER_UARTA_PHYS,
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.irq = gpio_to_irq(VIPER_UARTA_GPIO),
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.uartclk = 1843200,
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.regshift = 1,
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.iotype = UPIO_MEM,
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.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
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UPF_SKIP_TEST,
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},
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{
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.mapbase = VIPER_UARTB_PHYS,
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.irq = gpio_to_irq(VIPER_UARTB_GPIO),
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.uartclk = 1843200,
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.regshift = 1,
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.iotype = UPIO_MEM,
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.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP |
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UPF_SKIP_TEST,
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},
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#endif
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{ },
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};
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static struct platform_device serial_device = {
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.name = "serial8250",
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.id = 0,
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.dev = {
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.platform_data = serial_platform_data,
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},
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.num_resources = ARRAY_SIZE(viper_serial_resources),
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.resource = viper_serial_resources,
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};
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/* USB */
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static void isp116x_delay(struct device *dev, int delay)
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{
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ndelay(delay);
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}
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static struct resource isp116x_resources[] = {
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[0] = { /* DATA */
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.start = VIPER_USB_PHYS + 0,
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.end = VIPER_USB_PHYS + 1,
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.flags = IORESOURCE_MEM,
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},
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[1] = { /* ADDR */
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.start = VIPER_USB_PHYS + 2,
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.end = VIPER_USB_PHYS + 3,
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.flags = IORESOURCE_MEM,
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},
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[2] = {
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.start = gpio_to_irq(VIPER_USB_GPIO),
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.end = gpio_to_irq(VIPER_USB_GPIO),
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.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE,
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},
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};
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/* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */
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static struct isp116x_platform_data isp116x_platform_data = {
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/* Enable internal resistors on downstream ports */
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.sel15Kres = 1,
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/* On-chip overcurrent protection */
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.oc_enable = 1,
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/* INT output polarity */
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.int_act_high = 1,
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/* INT edge or level triggered */
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.int_edge_triggered = 0,
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/* WAKEUP pin connected - NOT SUPPORTED */
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/* .remote_wakeup_connected = 0, */
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/* Wakeup by devices on usb bus enabled */
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.remote_wakeup_enable = 0,
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.delay = isp116x_delay,
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};
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static struct platform_device isp116x_device = {
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.name = "isp116x-hcd",
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.id = -1,
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.num_resources = ARRAY_SIZE(isp116x_resources),
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.resource = isp116x_resources,
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.dev = {
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.platform_data = &isp116x_platform_data,
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},
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};
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/* MTD */
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static struct resource mtd_resources[] = {
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[0] = { /* RedBoot config + filesystem flash */
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.start = VIPER_FLASH_PHYS,
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.end = VIPER_FLASH_PHYS + SZ_32M - 1,
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.flags = IORESOURCE_MEM,
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},
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[1] = { /* Boot flash */
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.start = VIPER_BOOT_PHYS,
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.end = VIPER_BOOT_PHYS + SZ_1M - 1,
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.flags = IORESOURCE_MEM,
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},
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[2] = { /*
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* SRAM size is actually 256KB, 8bits, with a sparse mapping
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* (each byte is on a 16bit boundary).
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*/
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.start = _VIPER_SRAM_BASE,
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.end = _VIPER_SRAM_BASE + SZ_512K - 1,
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.flags = IORESOURCE_MEM,
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},
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};
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static struct mtd_partition viper_boot_flash_partition = {
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.name = "RedBoot",
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.size = SZ_1M,
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.offset = 0,
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.mask_flags = MTD_WRITEABLE, /* force R/O */
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};
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static struct physmap_flash_data viper_flash_data[] = {
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[0] = {
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.width = 2,
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.parts = NULL,
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.nr_parts = 0,
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},
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[1] = {
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.width = 2,
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.parts = &viper_boot_flash_partition,
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.nr_parts = 1,
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},
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};
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static struct platform_device viper_mtd_devices[] = {
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[0] = {
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.name = "physmap-flash",
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.id = 0,
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.dev = {
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.platform_data = &viper_flash_data[0],
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},
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.resource = &mtd_resources[0],
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.num_resources = 1,
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},
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[1] = {
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.name = "physmap-flash",
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.id = 1,
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.dev = {
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.platform_data = &viper_flash_data[1],
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},
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.resource = &mtd_resources[1],
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.num_resources = 1,
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},
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};
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static struct platform_device *viper_devs[] __initdata = {
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&smc91x_device,
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&i2c_bus_device,
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&serial_device,
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&isp116x_device,
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&viper_mtd_devices[0],
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&viper_mtd_devices[1],
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&viper_backlight_device,
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};
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static mfp_cfg_t viper_pin_config[] __initdata = {
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/* Chip selects */
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GPIO15_nCS_1,
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GPIO78_nCS_2,
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GPIO79_nCS_3,
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GPIO80_nCS_4,
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GPIO33_nCS_5,
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/* FP Backlight */
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GPIO9_GPIO, /* VIPER_BCKLIGHT_EN_GPIO */
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GPIO10_GPIO, /* VIPER_LCD_EN_GPIO */
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GPIO16_PWM0_OUT,
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/* Ethernet PHY Ready */
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GPIO18_RDY,
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/* Serial shutdown */
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GPIO12_GPIO | MFP_LPM_DRIVE_HIGH, /* VIPER_UART_SHDN_GPIO */
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/* Compact-Flash / PC104 */
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GPIO48_nPOE,
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GPIO49_nPWE,
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GPIO50_nPIOR,
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GPIO51_nPIOW,
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GPIO52_nPCE_1,
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GPIO53_nPCE_2,
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GPIO54_nPSKTSEL,
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GPIO55_nPREG,
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GPIO56_nPWAIT,
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GPIO57_nIOIS16,
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GPIO8_GPIO, /* VIPER_CF_RDY_GPIO */
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GPIO32_GPIO, /* VIPER_CF_CD_GPIO */
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GPIO82_GPIO, /* VIPER_CF_POWER_GPIO */
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/* Integrated UPS control */
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GPIO20_GPIO, /* VIPER_UPS_GPIO */
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/* Vcc regulator control */
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GPIO6_GPIO, /* VIPER_PSU_DATA_GPIO */
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GPIO11_GPIO, /* VIPER_PSU_CLK_GPIO */
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GPIO19_GPIO, /* VIPER_PSU_nCS_LD_GPIO */
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/* i2c busses */
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GPIO26_GPIO, /* VIPER_TPM_I2C_SDA_GPIO */
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GPIO27_GPIO, /* VIPER_TPM_I2C_SCL_GPIO */
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GPIO83_GPIO, /* VIPER_RTC_I2C_SDA_GPIO */
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GPIO84_GPIO, /* VIPER_RTC_I2C_SCL_GPIO */
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/* PC/104 Interrupt */
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GPIO1_GPIO | WAKEUP_ON_EDGE_RISE, /* VIPER_CPLD_GPIO */
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};
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static unsigned long viper_tpm;
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static int __init viper_tpm_setup(char *str)
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{
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strict_strtoul(str, 10, &viper_tpm);
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return 1;
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}
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__setup("tpm=", viper_tpm_setup);
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static void __init viper_tpm_init(void)
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{
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struct platform_device *tpm_device;
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struct i2c_gpio_platform_data i2c_tpm_data = {
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.sda_pin = VIPER_TPM_I2C_SDA_GPIO,
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.scl_pin = VIPER_TPM_I2C_SCL_GPIO,
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.udelay = 10,
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.timeout = 100,
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};
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char *errstr;
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/* Allocate TPM i2c bus if requested */
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if (!viper_tpm)
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return;
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tpm_device = platform_device_alloc("i2c-gpio", 2);
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if (tpm_device) {
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if (!platform_device_add_data(tpm_device,
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&i2c_tpm_data,
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sizeof(i2c_tpm_data))) {
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if (platform_device_add(tpm_device)) {
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errstr = "register TPM i2c bus";
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goto error_free_tpm;
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}
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} else {
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errstr = "allocate TPM i2c bus data";
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goto error_free_tpm;
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}
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} else {
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errstr = "allocate TPM i2c device";
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goto error_tpm;
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}
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return;
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error_free_tpm:
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kfree(tpm_device);
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error_tpm:
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pr_err("viper: Couldn't %s, giving up\n", errstr);
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}
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static void __init viper_init_vcore_gpios(void)
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{
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if (gpio_request(VIPER_PSU_DATA_GPIO, "PSU data"))
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goto err_request_data;
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if (gpio_request(VIPER_PSU_CLK_GPIO, "PSU clock"))
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goto err_request_clk;
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if (gpio_request(VIPER_PSU_nCS_LD_GPIO, "PSU cs"))
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goto err_request_cs;
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if (gpio_direction_output(VIPER_PSU_DATA_GPIO, 0) ||
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gpio_direction_output(VIPER_PSU_CLK_GPIO, 0) ||
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gpio_direction_output(VIPER_PSU_nCS_LD_GPIO, 0))
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goto err_dir;
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/* c/should assume redboot set the correct level ??? */
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viper_set_core_cpu_voltage(get_clk_frequency_khz(0), 1);
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return;
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err_dir:
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gpio_free(VIPER_PSU_nCS_LD_GPIO);
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err_request_cs:
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gpio_free(VIPER_PSU_CLK_GPIO);
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err_request_clk:
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gpio_free(VIPER_PSU_DATA_GPIO);
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err_request_data:
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pr_err("viper: Failed to setup vcore control GPIOs\n");
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}
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static void __init viper_init_serial_gpio(void)
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{
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if (gpio_request(VIPER_UART_SHDN_GPIO, "UARTs shutdown"))
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goto err_request;
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if (gpio_direction_output(VIPER_UART_SHDN_GPIO, 0))
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goto err_dir;
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return;
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err_dir:
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gpio_free(VIPER_UART_SHDN_GPIO);
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err_request:
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pr_err("viper: Failed to setup UART shutdown GPIO\n");
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}
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#ifdef CONFIG_CPU_FREQ
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static int viper_cpufreq_notifier(struct notifier_block *nb,
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unsigned long val, void *data)
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{
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struct cpufreq_freqs *freq = data;
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/* TODO: Adjust timings??? */
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switch (val) {
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case CPUFREQ_PRECHANGE:
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if (freq->old < freq->new) {
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/* we are getting faster so raise the voltage
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* before we change freq */
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viper_set_core_cpu_voltage(freq->new, 0);
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}
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break;
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case CPUFREQ_POSTCHANGE:
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if (freq->old > freq->new) {
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/* we are slowing down so drop the power
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* after we change freq */
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viper_set_core_cpu_voltage(freq->new, 0);
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}
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break;
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case CPUFREQ_RESUMECHANGE:
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viper_set_core_cpu_voltage(freq->new, 0);
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break;
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default:
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/* ignore */
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break;
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}
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return 0;
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}
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static struct notifier_block viper_cpufreq_notifier_block = {
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.notifier_call = viper_cpufreq_notifier
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};
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static void __init viper_init_cpufreq(void)
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{
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if (cpufreq_register_notifier(&viper_cpufreq_notifier_block,
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CPUFREQ_TRANSITION_NOTIFIER))
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pr_err("viper: Failed to setup cpufreq notifier\n");
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}
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#else
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static inline void viper_init_cpufreq(void) {}
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#endif
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static void viper_power_off(void)
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{
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pr_notice("Shutting off UPS\n");
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gpio_set_value(VIPER_UPS_GPIO, 1);
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/* Spin to death... */
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while (1);
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}
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static void __init viper_init(void)
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{
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u8 version;
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pm_power_off = viper_power_off;
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pxa2xx_mfp_config(ARRAY_AND_SIZE(viper_pin_config));
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/* Wake-up serial console */
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viper_init_serial_gpio();
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set_pxa_fb_info(&fb_info);
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/* v1 hardware cannot use the datacs line */
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version = viper_hw_version();
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if (version == 0)
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smc91x_device.num_resources--;
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pxa_set_i2c_info(NULL);
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platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs));
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viper_init_vcore_gpios();
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viper_init_cpufreq();
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sysdev_driver_register(&cpu_sysdev_class, &viper_cpu_sysdev_driver);
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if (version) {
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pr_info("viper: hardware v%di%d detected. "
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"CPLD revision %d.\n",
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VIPER_BOARD_VERSION(version),
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VIPER_BOARD_ISSUE(version),
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VIPER_CPLD_REVISION(version));
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system_rev = (VIPER_BOARD_VERSION(version) << 8) |
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(VIPER_BOARD_ISSUE(version) << 4) |
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VIPER_CPLD_REVISION(version);
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} else {
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pr_info("viper: No version register.\n");
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}
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i2c_register_board_info(1, ARRAY_AND_SIZE(viper_i2c_devices));
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viper_tpm_init();
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pxa_set_ac97_info(NULL);
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}
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static struct map_desc viper_io_desc[] __initdata = {
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{
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.virtual = VIPER_CPLD_BASE,
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.pfn = __phys_to_pfn(VIPER_CPLD_PHYS),
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.length = 0x00300000,
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.type = MT_DEVICE,
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},
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{
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.virtual = VIPER_PC104IO_BASE,
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.pfn = __phys_to_pfn(0x30000000),
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.length = 0x00800000,
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.type = MT_DEVICE,
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},
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};
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static void __init viper_map_io(void)
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{
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pxa_map_io();
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iotable_init(viper_io_desc, ARRAY_SIZE(viper_io_desc));
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PCFR |= PCFR_OPDE;
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}
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MACHINE_START(VIPER, "Arcom/Eurotech VIPER SBC")
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/* Maintainer: Marc Zyngier <maz@misterjones.org> */
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.phys_io = 0x40000000,
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.io_pg_offst = (io_p2v(0x40000000) >> 18) & 0xfffc,
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.boot_params = 0xa0000100,
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.map_io = viper_map_io,
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.init_irq = viper_init_irq,
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.timer = &pxa_timer,
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.init_machine = viper_init,
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MACHINE_END
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