161 lines
3.9 KiB
C
161 lines
3.9 KiB
C
/*
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* linux/arch/arm/mach-pxa/generic.c
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*
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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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* Code common to all PXA machines.
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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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* Since this file should be linked before any other machine specific file,
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* the __initcall() here will be executed first. This serves as default
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* initialization stuff for PXA machines which can be overridden later if
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* need be.
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*/
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <mach/hardware.h>
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#include <asm/system.h>
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#include <asm/pgtable.h>
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#include <asm/mach/map.h>
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#include <asm/mach-types.h>
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#include <mach/reset.h>
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#include <mach/gpio.h>
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#include <mach/pxa2xx-gpio.h>
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#include "generic.h"
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void clear_reset_status(unsigned int mask)
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{
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if (cpu_is_pxa2xx())
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pxa2xx_clear_reset_status(mask);
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if (cpu_is_pxa3xx())
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pxa3xx_clear_reset_status(mask);
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}
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unsigned long get_clock_tick_rate(void)
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{
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unsigned long clock_tick_rate;
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if (cpu_is_pxa25x())
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clock_tick_rate = 3686400;
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else if (machine_is_mainstone())
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clock_tick_rate = 3249600;
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else
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clock_tick_rate = 3250000;
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return clock_tick_rate;
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}
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EXPORT_SYMBOL(get_clock_tick_rate);
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/*
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* Get the clock frequency as reflected by CCCR and the turbo flag.
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* We assume these values have been applied via a fcs.
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* If info is not 0 we also display the current settings.
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*/
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unsigned int get_clk_frequency_khz(int info)
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{
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if (cpu_is_pxa25x())
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return pxa25x_get_clk_frequency_khz(info);
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else if (cpu_is_pxa27x())
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return pxa27x_get_clk_frequency_khz(info);
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else
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return pxa3xx_get_clk_frequency_khz(info);
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}
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EXPORT_SYMBOL(get_clk_frequency_khz);
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/*
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* Return the current memory clock frequency in units of 10kHz
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*/
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unsigned int get_memclk_frequency_10khz(void)
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{
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if (cpu_is_pxa25x())
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return pxa25x_get_memclk_frequency_10khz();
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else if (cpu_is_pxa27x())
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return pxa27x_get_memclk_frequency_10khz();
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else
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return pxa3xx_get_memclk_frequency_10khz();
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}
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EXPORT_SYMBOL(get_memclk_frequency_10khz);
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/*
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* Intel PXA2xx internal register mapping.
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*
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* Note 1: not all PXA2xx variants implement all those addresses.
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*
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* Note 2: virtual 0xfffe0000-0xffffffff is reserved for the vector table
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* and cache flush area.
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*/
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static struct map_desc standard_io_desc[] __initdata = {
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{ /* Devs */
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.virtual = 0xf2000000,
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.pfn = __phys_to_pfn(0x40000000),
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.length = 0x02000000,
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.type = MT_DEVICE
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}, { /* Mem Ctl */
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.virtual = 0xf6000000,
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.pfn = __phys_to_pfn(0x48000000),
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.length = 0x00200000,
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.type = MT_DEVICE
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}, { /* Camera */
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.virtual = 0xfa000000,
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.pfn = __phys_to_pfn(0x50000000),
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.length = 0x00100000,
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.type = MT_DEVICE
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}, { /* IMem ctl */
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.virtual = 0xfe000000,
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.pfn = __phys_to_pfn(0x58000000),
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.length = 0x00100000,
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.type = MT_DEVICE
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}, { /* UNCACHED_PHYS_0 */
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.virtual = 0xff000000,
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.pfn = __phys_to_pfn(0x00000000),
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.length = 0x00100000,
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.type = MT_DEVICE
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}
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};
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void __init pxa_map_io(void)
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{
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iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
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get_clk_frequency_khz(1);
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}
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/*
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* Configure pins for GPIO or other functions
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*/
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int pxa_gpio_mode(int gpio_mode)
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{
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unsigned long flags;
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int gpio = gpio_mode & GPIO_MD_MASK_NR;
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int fn = (gpio_mode & GPIO_MD_MASK_FN) >> 8;
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int gafr;
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if (gpio > pxa_last_gpio)
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return -EINVAL;
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local_irq_save(flags);
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if (gpio_mode & GPIO_DFLT_LOW)
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GPCR(gpio) = GPIO_bit(gpio);
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else if (gpio_mode & GPIO_DFLT_HIGH)
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GPSR(gpio) = GPIO_bit(gpio);
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if (gpio_mode & GPIO_MD_MASK_DIR)
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GPDR(gpio) |= GPIO_bit(gpio);
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else
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GPDR(gpio) &= ~GPIO_bit(gpio);
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gafr = GAFR(gpio) & ~(0x3 << (((gpio) & 0xf)*2));
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GAFR(gpio) = gafr | (fn << (((gpio) & 0xf)*2));
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local_irq_restore(flags);
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return 0;
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}
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EXPORT_SYMBOL(pxa_gpio_mode);
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