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1022 lines
23 KiB
1022 lines
23 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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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 <[email protected]> |
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* <[email protected]> |
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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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|
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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/slab.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/jiffies.h> |
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#include <linux/platform_data/i2c-gpio.h> |
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#include <linux/gpio/machine.h> |
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#include <linux/platform_data/i2c-pxa.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.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 <linux/syscore_ops.h> |
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|
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#include "pxa25x.h" |
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#include <mach/audio.h> |
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#include <linux/platform_data/video-pxafb.h> |
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#include <mach/regs-uart.h> |
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#include <linux/platform_data/pcmcia-pxa2xx_viper.h> |
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#include "viper.h" |
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|
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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 <linux/sizes.h> |
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#include <asm/system_info.h> |
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|
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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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|
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#include "generic.h" |
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#include "devices.h" |
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|
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static unsigned int icr; |
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|
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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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|
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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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|
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/* This function is used from the pcmcia module to reset the CF */ |
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static void viper_cf_reset(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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|
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static struct arcom_pcmcia_pdata viper_pcmcia_info = { |
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.cd_gpio = VIPER_CF_CD_GPIO, |
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.rdy_gpio = VIPER_CF_RDY_GPIO, |
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.pwr_gpio = VIPER_CF_POWER_GPIO, |
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.reset = viper_cf_reset, |
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}; |
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|
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static struct platform_device viper_pcmcia_device = { |
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.name = "viper-pcmcia", |
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.id = -1, |
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.dev = { |
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.platform_data = &viper_pcmcia_info, |
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}, |
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}; |
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|
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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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|
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local_irq_save(flags); |
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|
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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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|
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v1 = (v1 != v2 || v1 == 0xff) ? 0 : v1; |
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|
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local_irq_restore(flags); |
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return v1; |
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} |
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|
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/* CPU system core operations. */ |
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static int viper_cpu_suspend(void) |
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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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|
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static void viper_cpu_resume(void) |
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{ |
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viper_icr_clear_bit(VIPER_ICR_R_DIS); |
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} |
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|
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static struct syscore_ops viper_cpu_syscore_ops = { |
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.suspend = viper_cpu_suspend, |
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.resume = viper_cpu_resume, |
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}; |
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|
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static unsigned int current_voltage_divisor; |
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|
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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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|
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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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|
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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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|
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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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|
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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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|
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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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|
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gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 1); |
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udelay(1); |
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|
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gpio_set_value(VIPER_PSU_nCS_LD_GPIO, 0); |
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|
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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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|
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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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|
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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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|
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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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|
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static void viper_ack_irq(struct irq_data *d) |
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{ |
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int viper_irq = viper_irq_to_bitmask(d->irq); |
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|
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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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|
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static void viper_mask_irq(struct irq_data *d) |
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{ |
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viper_irq_enabled_mask &= ~(viper_irq_to_bitmask(d->irq)); |
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} |
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|
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static void viper_unmask_irq(struct irq_data *d) |
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{ |
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viper_irq_enabled_mask |= viper_irq_to_bitmask(d->irq); |
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} |
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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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|
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static void viper_irq_handler(struct irq_desc *desc) |
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{ |
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unsigned int irq; |
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unsigned long pending; |
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|
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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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desc->irq_data.chip->irq_ack(&desc->irq_data); |
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|
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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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.irq_ack = viper_ack_irq, |
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.irq_mask = viper_mask_irq, |
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.irq_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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|
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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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irq_set_chip_and_handler(isa_irq, &viper_irq_chip, |
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handle_edge_irq); |
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irq_clear_status_flags(isa_irq, IRQ_NOREQUEST | IRQ_NOPROBE); |
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} |
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irq_set_chained_handler(gpio_to_irq(VIPER_CPLD_GPIO), |
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viper_irq_handler); |
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irq_set_irq_type(gpio_to_irq(VIPER_CPLD_GPIO), IRQ_TYPE_EDGE_BOTH); |
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} |
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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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|
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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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|
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static struct pwm_lookup viper_pwm_lookup[] = { |
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PWM_LOOKUP("pxa25x-pwm.0", 0, "pwm-backlight.0", NULL, 1000000, |
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PWM_POLARITY_NORMAL), |
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}; |
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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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|
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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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|
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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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|
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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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|
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return 0; |
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|
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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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|
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return ret; |
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} |
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|
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static int viper_backlight_notify(struct device *dev, 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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|
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return brightness; |
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} |
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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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|
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static struct platform_pwm_backlight_data viper_backlight_data = { |
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.max_brightness = 100, |
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.dft_brightness = 100, |
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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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|
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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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|
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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 = PXA_GPIO_TO_IRQ(VIPER_ETH_GPIO), |
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.end = PXA_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 gpiod_lookup_table viper_i2c_gpiod_table = { |
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.dev_id = "i2c-gpio.1", |
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.table = { |
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GPIO_LOOKUP_IDX("gpio-pxa", VIPER_RTC_I2C_SDA_GPIO, |
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NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), |
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GPIO_LOOKUP_IDX("gpio-pxa", VIPER_RTC_I2C_SCL_GPIO, |
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NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), |
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}, |
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}; |
|
|
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static struct i2c_gpio_platform_data i2c_bus_data = { |
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.udelay = 10, |
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.timeout = HZ, |
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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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/* |
|
* Serial configuration: |
|
* 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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static struct plat_serial8250_port serial_platform_data[] = { |
|
#ifndef CONFIG_SERIAL_PXA |
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/* Internal UARTs */ |
|
{ |
|
.membase = (void *)&FFUART, |
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.mapbase = __PREG(FFUART), |
|
.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, |
|
}, |
|
/* External UARTs */ |
|
{ |
|
.mapbase = VIPER_UARTA_PHYS, |
|
.irq = PXA_GPIO_TO_IRQ(VIPER_UARTA_GPIO), |
|
.irqflags = IRQF_TRIGGER_RISING, |
|
.uartclk = 1843200, |
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.regshift = 1, |
|
.iotype = UPIO_MEM, |
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.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | |
|
UPF_SKIP_TEST, |
|
}, |
|
{ |
|
.mapbase = VIPER_UARTB_PHYS, |
|
.irq = PXA_GPIO_TO_IRQ(VIPER_UARTB_GPIO), |
|
.irqflags = IRQF_TRIGGER_RISING, |
|
.uartclk = 1843200, |
|
.regshift = 1, |
|
.iotype = UPIO_MEM, |
|
.flags = UPF_BOOT_AUTOCONF | UPF_IOREMAP | |
|
UPF_SKIP_TEST, |
|
}, |
|
#endif |
|
{ }, |
|
}; |
|
|
|
static struct platform_device serial_device = { |
|
.name = "serial8250", |
|
.id = 0, |
|
.dev = { |
|
.platform_data = serial_platform_data, |
|
}, |
|
.num_resources = ARRAY_SIZE(viper_serial_resources), |
|
.resource = viper_serial_resources, |
|
}; |
|
|
|
/* USB */ |
|
static void isp116x_delay(struct device *dev, int delay) |
|
{ |
|
ndelay(delay); |
|
} |
|
|
|
static struct resource isp116x_resources[] = { |
|
[0] = { /* DATA */ |
|
.start = VIPER_USB_PHYS + 0, |
|
.end = VIPER_USB_PHYS + 1, |
|
.flags = IORESOURCE_MEM, |
|
}, |
|
[1] = { /* ADDR */ |
|
.start = VIPER_USB_PHYS + 2, |
|
.end = VIPER_USB_PHYS + 3, |
|
.flags = IORESOURCE_MEM, |
|
}, |
|
[2] = { |
|
.start = PXA_GPIO_TO_IRQ(VIPER_USB_GPIO), |
|
.end = PXA_GPIO_TO_IRQ(VIPER_USB_GPIO), |
|
.flags = IORESOURCE_IRQ | IORESOURCE_IRQ_HIGHEDGE, |
|
}, |
|
}; |
|
|
|
/* (DataBusWidth16|AnalogOCEnable|DREQOutputPolarity|DownstreamPort15KRSel ) */ |
|
static struct isp116x_platform_data isp116x_platform_data = { |
|
/* Enable internal resistors on downstream ports */ |
|
.sel15Kres = 1, |
|
/* On-chip overcurrent protection */ |
|
.oc_enable = 1, |
|
/* INT output polarity */ |
|
.int_act_high = 1, |
|
/* INT edge or level triggered */ |
|
.int_edge_triggered = 0, |
|
|
|
/* WAKEUP pin connected - NOT SUPPORTED */ |
|
/* .remote_wakeup_connected = 0, */ |
|
/* Wakeup by devices on usb bus enabled */ |
|
.remote_wakeup_enable = 0, |
|
.delay = isp116x_delay, |
|
}; |
|
|
|
static struct platform_device isp116x_device = { |
|
.name = "isp116x-hcd", |
|
.id = -1, |
|
.num_resources = ARRAY_SIZE(isp116x_resources), |
|
.resource = isp116x_resources, |
|
.dev = { |
|
.platform_data = &isp116x_platform_data, |
|
}, |
|
|
|
}; |
|
|
|
/* MTD */ |
|
static struct resource mtd_resources[] = { |
|
[0] = { /* RedBoot config + filesystem flash */ |
|
.start = VIPER_FLASH_PHYS, |
|
.end = VIPER_FLASH_PHYS + SZ_32M - 1, |
|
.flags = IORESOURCE_MEM, |
|
}, |
|
[1] = { /* Boot flash */ |
|
.start = VIPER_BOOT_PHYS, |
|
.end = VIPER_BOOT_PHYS + SZ_1M - 1, |
|
.flags = IORESOURCE_MEM, |
|
}, |
|
[2] = { /* |
|
* SRAM size is actually 256KB, 8bits, with a sparse mapping |
|
* (each byte is on a 16bit boundary). |
|
*/ |
|
.start = _VIPER_SRAM_BASE, |
|
.end = _VIPER_SRAM_BASE + SZ_512K - 1, |
|
.flags = IORESOURCE_MEM, |
|
}, |
|
}; |
|
|
|
static struct mtd_partition viper_boot_flash_partition = { |
|
.name = "RedBoot", |
|
.size = SZ_1M, |
|
.offset = 0, |
|
.mask_flags = MTD_WRITEABLE, /* force R/O */ |
|
}; |
|
|
|
static struct physmap_flash_data viper_flash_data[] = { |
|
[0] = { |
|
.width = 2, |
|
.parts = NULL, |
|
.nr_parts = 0, |
|
}, |
|
[1] = { |
|
.width = 2, |
|
.parts = &viper_boot_flash_partition, |
|
.nr_parts = 1, |
|
}, |
|
}; |
|
|
|
static struct platform_device viper_mtd_devices[] = { |
|
[0] = { |
|
.name = "physmap-flash", |
|
.id = 0, |
|
.dev = { |
|
.platform_data = &viper_flash_data[0], |
|
}, |
|
.resource = &mtd_resources[0], |
|
.num_resources = 1, |
|
}, |
|
[1] = { |
|
.name = "physmap-flash", |
|
.id = 1, |
|
.dev = { |
|
.platform_data = &viper_flash_data[1], |
|
}, |
|
.resource = &mtd_resources[1], |
|
.num_resources = 1, |
|
}, |
|
}; |
|
|
|
static struct platform_device *viper_devs[] __initdata = { |
|
&smc91x_device, |
|
&i2c_bus_device, |
|
&serial_device, |
|
&isp116x_device, |
|
&viper_mtd_devices[0], |
|
&viper_mtd_devices[1], |
|
&viper_backlight_device, |
|
&viper_pcmcia_device, |
|
}; |
|
|
|
static mfp_cfg_t viper_pin_config[] __initdata = { |
|
/* Chip selects */ |
|
GPIO15_nCS_1, |
|
GPIO78_nCS_2, |
|
GPIO79_nCS_3, |
|
GPIO80_nCS_4, |
|
GPIO33_nCS_5, |
|
|
|
/* AC97 */ |
|
GPIO28_AC97_BITCLK, |
|
GPIO29_AC97_SDATA_IN_0, |
|
GPIO30_AC97_SDATA_OUT, |
|
GPIO31_AC97_SYNC, |
|
|
|
/* FP Backlight */ |
|
GPIO9_GPIO, /* VIPER_BCKLIGHT_EN_GPIO */ |
|
GPIO10_GPIO, /* VIPER_LCD_EN_GPIO */ |
|
GPIO16_PWM0_OUT, |
|
|
|
/* Ethernet PHY Ready */ |
|
GPIO18_RDY, |
|
|
|
/* Serial shutdown */ |
|
GPIO12_GPIO | MFP_LPM_DRIVE_HIGH, /* VIPER_UART_SHDN_GPIO */ |
|
|
|
/* Compact-Flash / PC104 */ |
|
GPIO48_nPOE, |
|
GPIO49_nPWE, |
|
GPIO50_nPIOR, |
|
GPIO51_nPIOW, |
|
GPIO52_nPCE_1, |
|
GPIO53_nPCE_2, |
|
GPIO54_nPSKTSEL, |
|
GPIO55_nPREG, |
|
GPIO56_nPWAIT, |
|
GPIO57_nIOIS16, |
|
GPIO8_GPIO, /* VIPER_CF_RDY_GPIO */ |
|
GPIO32_GPIO, /* VIPER_CF_CD_GPIO */ |
|
GPIO82_GPIO, /* VIPER_CF_POWER_GPIO */ |
|
|
|
/* Integrated UPS control */ |
|
GPIO20_GPIO, /* VIPER_UPS_GPIO */ |
|
|
|
/* Vcc regulator control */ |
|
GPIO6_GPIO, /* VIPER_PSU_DATA_GPIO */ |
|
GPIO11_GPIO, /* VIPER_PSU_CLK_GPIO */ |
|
GPIO19_GPIO, /* VIPER_PSU_nCS_LD_GPIO */ |
|
|
|
/* i2c busses */ |
|
GPIO26_GPIO, /* VIPER_TPM_I2C_SDA_GPIO */ |
|
GPIO27_GPIO, /* VIPER_TPM_I2C_SCL_GPIO */ |
|
GPIO83_GPIO, /* VIPER_RTC_I2C_SDA_GPIO */ |
|
GPIO84_GPIO, /* VIPER_RTC_I2C_SCL_GPIO */ |
|
|
|
/* PC/104 Interrupt */ |
|
GPIO1_GPIO | WAKEUP_ON_EDGE_RISE, /* VIPER_CPLD_GPIO */ |
|
}; |
|
|
|
static unsigned long viper_tpm; |
|
|
|
static int __init viper_tpm_setup(char *str) |
|
{ |
|
return kstrtoul(str, 10, &viper_tpm) >= 0; |
|
} |
|
|
|
__setup("tpm=", viper_tpm_setup); |
|
|
|
struct gpiod_lookup_table viper_tpm_i2c_gpiod_table = { |
|
.dev_id = "i2c-gpio.2", |
|
.table = { |
|
GPIO_LOOKUP_IDX("gpio-pxa", VIPER_TPM_I2C_SDA_GPIO, |
|
NULL, 0, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), |
|
GPIO_LOOKUP_IDX("gpio-pxa", VIPER_TPM_I2C_SCL_GPIO, |
|
NULL, 1, GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN), |
|
}, |
|
}; |
|
|
|
static void __init viper_tpm_init(void) |
|
{ |
|
struct platform_device *tpm_device; |
|
struct i2c_gpio_platform_data i2c_tpm_data = { |
|
.udelay = 10, |
|
.timeout = HZ, |
|
}; |
|
char *errstr; |
|
|
|
/* Allocate TPM i2c bus if requested */ |
|
if (!viper_tpm) |
|
return; |
|
|
|
gpiod_add_lookup_table(&viper_tpm_i2c_gpiod_table); |
|
tpm_device = platform_device_alloc("i2c-gpio", 2); |
|
if (tpm_device) { |
|
if (!platform_device_add_data(tpm_device, |
|
&i2c_tpm_data, |
|
sizeof(i2c_tpm_data))) { |
|
if (platform_device_add(tpm_device)) { |
|
errstr = "register TPM i2c bus"; |
|
goto error_free_tpm; |
|
} |
|
} else { |
|
errstr = "allocate TPM i2c bus data"; |
|
goto error_free_tpm; |
|
} |
|
} else { |
|
errstr = "allocate TPM i2c device"; |
|
goto error_tpm; |
|
} |
|
|
|
return; |
|
|
|
error_free_tpm: |
|
kfree(tpm_device); |
|
error_tpm: |
|
pr_err("viper: Couldn't %s, giving up\n", errstr); |
|
} |
|
|
|
static void __init viper_init_vcore_gpios(void) |
|
{ |
|
if (gpio_request(VIPER_PSU_DATA_GPIO, "PSU data")) |
|
goto err_request_data; |
|
|
|
if (gpio_request(VIPER_PSU_CLK_GPIO, "PSU clock")) |
|
goto err_request_clk; |
|
|
|
if (gpio_request(VIPER_PSU_nCS_LD_GPIO, "PSU cs")) |
|
goto err_request_cs; |
|
|
|
if (gpio_direction_output(VIPER_PSU_DATA_GPIO, 0) || |
|
gpio_direction_output(VIPER_PSU_CLK_GPIO, 0) || |
|
gpio_direction_output(VIPER_PSU_nCS_LD_GPIO, 0)) |
|
goto err_dir; |
|
|
|
/* c/should assume redboot set the correct level ??? */ |
|
viper_set_core_cpu_voltage(get_clk_frequency_khz(0), 1); |
|
|
|
return; |
|
|
|
err_dir: |
|
gpio_free(VIPER_PSU_nCS_LD_GPIO); |
|
err_request_cs: |
|
gpio_free(VIPER_PSU_CLK_GPIO); |
|
err_request_clk: |
|
gpio_free(VIPER_PSU_DATA_GPIO); |
|
err_request_data: |
|
pr_err("viper: Failed to setup vcore control GPIOs\n"); |
|
} |
|
|
|
static void __init viper_init_serial_gpio(void) |
|
{ |
|
if (gpio_request(VIPER_UART_SHDN_GPIO, "UARTs shutdown")) |
|
goto err_request; |
|
|
|
if (gpio_direction_output(VIPER_UART_SHDN_GPIO, 0)) |
|
goto err_dir; |
|
|
|
return; |
|
|
|
err_dir: |
|
gpio_free(VIPER_UART_SHDN_GPIO); |
|
err_request: |
|
pr_err("viper: Failed to setup UART shutdown GPIO\n"); |
|
} |
|
|
|
#ifdef CONFIG_CPU_FREQ |
|
static int viper_cpufreq_notifier(struct notifier_block *nb, |
|
unsigned long val, void *data) |
|
{ |
|
struct cpufreq_freqs *freq = data; |
|
|
|
/* TODO: Adjust timings??? */ |
|
|
|
switch (val) { |
|
case CPUFREQ_PRECHANGE: |
|
if (freq->old < freq->new) { |
|
/* we are getting faster so raise the voltage |
|
* before we change freq */ |
|
viper_set_core_cpu_voltage(freq->new, 0); |
|
} |
|
break; |
|
case CPUFREQ_POSTCHANGE: |
|
if (freq->old > freq->new) { |
|
/* we are slowing down so drop the power |
|
* after we change freq */ |
|
viper_set_core_cpu_voltage(freq->new, 0); |
|
} |
|
break; |
|
default: |
|
/* ignore */ |
|
break; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
static struct notifier_block viper_cpufreq_notifier_block = { |
|
.notifier_call = viper_cpufreq_notifier |
|
}; |
|
|
|
static void __init viper_init_cpufreq(void) |
|
{ |
|
if (cpufreq_register_notifier(&viper_cpufreq_notifier_block, |
|
CPUFREQ_TRANSITION_NOTIFIER)) |
|
pr_err("viper: Failed to setup cpufreq notifier\n"); |
|
} |
|
#else |
|
static inline void viper_init_cpufreq(void) {} |
|
#endif |
|
|
|
static void viper_power_off(void) |
|
{ |
|
pr_notice("Shutting off UPS\n"); |
|
gpio_set_value(VIPER_UPS_GPIO, 1); |
|
/* Spin to death... */ |
|
while (1); |
|
} |
|
|
|
static void __init viper_init(void) |
|
{ |
|
u8 version; |
|
|
|
pm_power_off = viper_power_off; |
|
|
|
pxa2xx_mfp_config(ARRAY_AND_SIZE(viper_pin_config)); |
|
|
|
pxa_set_ffuart_info(NULL); |
|
pxa_set_btuart_info(NULL); |
|
pxa_set_stuart_info(NULL); |
|
|
|
/* Wake-up serial console */ |
|
viper_init_serial_gpio(); |
|
|
|
pxa_set_fb_info(NULL, &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); |
|
gpiod_add_lookup_table(&viper_i2c_gpiod_table); |
|
pwm_add_table(viper_pwm_lookup, ARRAY_SIZE(viper_pwm_lookup)); |
|
platform_add_devices(viper_devs, ARRAY_SIZE(viper_devs)); |
|
|
|
viper_init_vcore_gpios(); |
|
viper_init_cpufreq(); |
|
|
|
register_syscore_ops(&viper_cpu_syscore_ops); |
|
|
|
if (version) { |
|
pr_info("viper: hardware v%di%d detected. " |
|
"CPLD revision %d.\n", |
|
VIPER_BOARD_VERSION(version), |
|
VIPER_BOARD_ISSUE(version), |
|
VIPER_CPLD_REVISION(version)); |
|
system_rev = (VIPER_BOARD_VERSION(version) << 8) | |
|
(VIPER_BOARD_ISSUE(version) << 4) | |
|
VIPER_CPLD_REVISION(version); |
|
} else { |
|
pr_info("viper: No version register.\n"); |
|
} |
|
|
|
i2c_register_board_info(1, ARRAY_AND_SIZE(viper_i2c_devices)); |
|
|
|
viper_tpm_init(); |
|
pxa_set_ac97_info(NULL); |
|
} |
|
|
|
static struct map_desc viper_io_desc[] __initdata = { |
|
{ |
|
.virtual = VIPER_CPLD_BASE, |
|
.pfn = __phys_to_pfn(VIPER_CPLD_PHYS), |
|
.length = 0x00300000, |
|
.type = MT_DEVICE, |
|
}, |
|
{ |
|
.virtual = VIPER_PC104IO_BASE, |
|
.pfn = __phys_to_pfn(0x30000000), |
|
.length = 0x00800000, |
|
.type = MT_DEVICE, |
|
}, |
|
}; |
|
|
|
static void __init viper_map_io(void) |
|
{ |
|
pxa25x_map_io(); |
|
|
|
iotable_init(viper_io_desc, ARRAY_SIZE(viper_io_desc)); |
|
|
|
PCFR |= PCFR_OPDE; |
|
} |
|
|
|
MACHINE_START(VIPER, "Arcom/Eurotech VIPER SBC") |
|
/* Maintainer: Marc Zyngier <[email protected]> */ |
|
.atag_offset = 0x100, |
|
.map_io = viper_map_io, |
|
.nr_irqs = PXA_NR_IRQS, |
|
.init_irq = viper_init_irq, |
|
.handle_irq = pxa25x_handle_irq, |
|
.init_time = pxa_timer_init, |
|
.init_machine = viper_init, |
|
.restart = pxa_restart, |
|
MACHINE_END
|
|
|