/* * linux/arch/arm/mach-sa1100/generic.c * * Author: Nicolas Pitre * * Code common to all SA11x0 machines. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. * * Since this file should be linked before any other machine specific file, * the __initcall() here will be executed first.  This serves as default * initialization stuff for SA1100 machines which can be overriden later if * need be. */#include <linux/config.h>#include <linux/module.h>#include <linux/kernel.h>#include <linux/init.h>#include <linux/delay.h>#include <linux/pm.h>#include <linux/cpufreq.h>#include <asm/hardware.h>#include <asm/system.h>#include <asm/pgtable.h>#include <asm/mach/map.h>#include "generic.h"#define NR_FREQS	16/* * This table is setup for a 3.6864MHz Crystal. */static const unsigned short cclk_frequency_100khz[NR_FREQS] = {	 590,	/*  59.0 MHz */	 737,	/*  73.7 MHz */	 885, 	/*  88.5 MHz */	1032,	/* 103.2 MHz */	1180,	/* 118.0 MHz */	1327,	/* 132.7 MHz */	1475,	/* 147.5 MHz */	1622,	/* 162.2 MHz */	1769,	/* 176.9 MHz */	1917,	/* 191.7 MHz */	2064,	/* 206.4 MHz */	2212,	/* 221.2 MHz */	2359,   /* 235.9 MHz */	2507,   /* 250.7 MHz */	2654,   /* 265.4 MHz */	2802    /* 280.2 MHz */};/* * Return the current CPU clock frequency in units of 100kHz */static inline unsigned short get_cclk_frequency(void){	return cclk_frequency_100khz[PPCR & 0xf];}#ifdef CONFIG_CPU_FREQunsigned int sa11x0_freq_to_ppcr(unsigned int khz){	int i;	khz /= 100;	for (i = NR_FREQS - 1; i > 0; i--)		if (cclk_frequency_100khz[i] <= khz)			break;	return i;}/* * Validate the speed in khz.  If we can't generate the precise * frequency requested, round it down (to be on the safe side). */unsigned int sa11x0_validatespeed(unsigned int khz){	return cclk_frequency_100khz[sa11x0_freq_to_ppcr(khz)] * 100;}static int __init sa11x0_init_clock(void){	cpufreq_init(cclk_frequency_100khz[PPCR & 0xf] * 100, 0, 0);	return 0;}__initcall(sa11x0_init_clock);#else/* * We still need to provide this so building without cpufreq works. */ unsigned int cpufreq_get(int cpu){	return cclk_frequency_100khz[PPCR & 0xf] * 100;}EXPORT_SYMBOL(cpufreq_get);#endif/* * Default power-off for SA1100 */static void sa1100_power_off(void){	mdelay(100);	cli();	/* disable internal oscillator, float CS lines */	PCFR = (PCFR_OPDE | PCFR_FP | PCFR_FS);	/* enable wake-up on GPIO0 (Assabet...) */	PWER = GFER = GRER = 1;	/*	 * set scratchpad to zero, just in case it is used as a	 * restart address by the bootloader.	 */	PSPR = 0;	/* enter sleep mode */	PMCR = PMCR_SF;}static int __init sa1100_init(void){	pm_power_off = sa1100_power_off;	return 0;}__initcall(sa1100_init);/* * Common I/O mapping: * * Typically, static virtual address mappings are as follow: * * 0xe8000000-0xefffffff:	flash memory (especially when multiple flash * 				banks need to be mapped contigously) * 0xf0000000-0xf3ffffff:	miscellaneous stuff (CPLDs, etc.) * 0xf4000000-0xf4ffffff:	SA-1111 * 0xf5000000-0xf5ffffff:	reserved (used by cache flushing area) * 0xf6000000-0xfffeffff:	reserved (internal SA1100 IO defined above) * 0xffff0000-0xffff0fff:	SA1100 exception vectors * * Below 0xe8000000 is reserved for vm allocation. * * The machine specific code must provide the extra mapping beside the * default mapping provided here. */static struct map_desc standard_io_desc[] __initdata = { /* virtual     physical    length      domain     r  w  c  b */  { 0xf6000000, 0x20000000, 0x01000000, DOMAIN_IO, 0, 1, 0, 0 }, /* PCMCIA0 IO */  { 0xf7000000, 0x30000000, 0x01000000, DOMAIN_IO, 0, 1, 0, 0 }, /* PCMCIA1 IO */  { 0xf8000000, 0x80000000, 0x00100000, DOMAIN_IO, 0, 1, 0, 0 }, /* PCM */  { 0xfa000000, 0x90000000, 0x00100000, DOMAIN_IO, 0, 1, 0, 0 }, /* SCM */  { 0xfc000000, 0xa0000000, 0x00100000, DOMAIN_IO, 0, 1, 0, 0 }, /* MER */  { 0xfe000000, 0xb0000000, 0x00200000, DOMAIN_IO, 0, 1, 0, 0 }, /* LCD + DMA */  LAST_DESC};void __init sa1100_map_io(void){	iotable_init(standard_io_desc);}