/* * 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. */#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 <linux/ioport.h>#include <linux/sched.h>	/* just for sched_clock() - funny that */#include <linux/platform_device.h>#include <asm/div64.h>#include <asm/hardware.h>#include <asm/system.h>#include <asm/pgtable.h>#include <asm/mach/map.h>#include <asm/mach/flash.h>#include <asm/irq.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 */};#if defined(CONFIG_CPU_FREQ_SA1100) || defined(CONFIG_CPU_FREQ_SA1110)/* rounds up(!)  */unsigned int sa11x0_freq_to_ppcr(unsigned int khz){	int i;	khz /= 100;	for (i = 0; i < NR_FREQS; i++)		if (cclk_frequency_100khz[i] >= khz)			break;	return i;}unsigned int sa11x0_ppcr_to_freq(unsigned int idx){	unsigned int freq = 0;	if (idx < NR_FREQS)		freq = cclk_frequency_100khz[idx] * 100;	return freq;}/* make sure that only the "userspace" governor is run -- anything else wouldn't make sense on * this platform, anyway. */int sa11x0_verify_speed(struct cpufreq_policy *policy){	unsigned int tmp;	if (policy->cpu)		return -EINVAL;	cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq);	/* make sure that at least one frequency is within the policy */	tmp = cclk_frequency_100khz[sa11x0_freq_to_ppcr(policy->min)] * 100;	if (tmp > policy->max)		policy->max = tmp;	cpufreq_verify_within_limits(policy, policy->cpuinfo.min_freq, policy->cpuinfo.max_freq);	return 0;}unsigned int sa11x0_getspeed(unsigned int cpu){	if (cpu)		return 0;	return cclk_frequency_100khz[PPCR & 0xf] * 100;}#else/* * We still need to provide this so building without cpufreq works. */ unsigned int cpufreq_get(unsigned int cpu){	return cclk_frequency_100khz[PPCR & 0xf] * 100;}EXPORT_SYMBOL(cpufreq_get);#endif/* * This is the SA11x0 sched_clock implementation.  This has * a resolution of 271ns, and a maximum value of 1165s. *  ( * 1E9 / 3686400 => * 78125 / 288) */unsigned long long sched_clock(void){	unsigned long long v;	v = (unsigned long long)OSCR * 78125;	do_div(v, 288);	return v;}/* * Default power-off for SA1100 */static void sa1100_power_off(void){	mdelay(100);	local_irq_disable();	/* 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 struct resource sa11x0udc_resources[] = {	[0] = {		.start	= 0x80000000,		.end	= 0x8000ffff,		.flags	= IORESOURCE_MEM,	},};static u64 sa11x0udc_dma_mask = 0xffffffffUL;static struct platform_device sa11x0udc_device = {	.name		= "sa11x0-udc",	.id		= -1,	.dev		= {		.dma_mask = &sa11x0udc_dma_mask,		.coherent_dma_mask = 0xffffffff,	},	.num_resources	= ARRAY_SIZE(sa11x0udc_resources),	.resource	= sa11x0udc_resources,};static struct resource sa11x0uart1_resources[] = {	[0] = {		.start	= 0x80010000,		.end	= 0x8001ffff,		.flags	= IORESOURCE_MEM,	},};static struct platform_device sa11x0uart1_device = {	.name		= "sa11x0-uart",	.id		= 1,	.num_resources	= ARRAY_SIZE(sa11x0uart1_resources),	.resource	= sa11x0uart1_resources,};static struct resource sa11x0uart3_resources[] = {	[0] = {		.start	= 0x80050000,		.end	= 0x8005ffff,		.flags	= IORESOURCE_MEM,	},};static struct platform_device sa11x0uart3_device = {	.name		= "sa11x0-uart",	.id		= 3,	.num_resources	= ARRAY_SIZE(sa11x0uart3_resources),	.resource	= sa11x0uart3_resources,};static struct resource sa11x0mcp_resources[] = {	[0] = {		.start	= 0x80060000,		.end	= 0x8006ffff,		.flags	= IORESOURCE_MEM,	},};static u64 sa11x0mcp_dma_mask = 0xffffffffUL;static struct platform_device sa11x0mcp_device = {	.name		= "sa11x0-mcp",	.id		= -1,	.dev = {		.dma_mask = &sa11x0mcp_dma_mask,		.coherent_dma_mask = 0xffffffff,	},	.num_resources	= ARRAY_SIZE(sa11x0mcp_resources),	.resource	= sa11x0mcp_resources,};void sa11x0_set_mcp_data(struct mcp_plat_data *data){	sa11x0mcp_device.dev.platform_data = data;}static struct resource sa11x0ssp_resources[] = {	[0] = {		.start	= 0x80070000,		.end	= 0x8007ffff,		.flags	= IORESOURCE_MEM,	},};static u64 sa11x0ssp_dma_mask = 0xffffffffUL;static struct platform_device sa11x0ssp_device = {	.name		= "sa11x0-ssp",	.id		= -1,	.dev = {		.dma_mask = &sa11x0ssp_dma_mask,		.coherent_dma_mask = 0xffffffff,	},	.num_resources	= ARRAY_SIZE(sa11x0ssp_resources),	.resource	= sa11x0ssp_resources,};static struct resource sa11x0fb_resources[] = {	[0] = {		.start	= 0xb0100000,		.end	= 0xb010ffff,		.flags	= IORESOURCE_MEM,	},	[1] = {		.start	= IRQ_LCD,		.end	= IRQ_LCD,		.flags	= IORESOURCE_IRQ,	},};static struct platform_device sa11x0fb_device = {	.name		= "sa11x0-fb",	.id		= -1,	.dev = {		.coherent_dma_mask = 0xffffffff,	},	.num_resources	= ARRAY_SIZE(sa11x0fb_resources),	.resource	= sa11x0fb_resources,};static struct platform_device sa11x0pcmcia_device = {	.name		= "sa11x0-pcmcia",	.id		= -1,};static struct platform_device sa11x0mtd_device = {	.name		= "flash",	.id		= -1,};void sa11x0_set_flash_data(struct flash_platform_data *flash,			   struct resource *res, int nr){	flash->name = "sa1100";	sa11x0mtd_device.dev.platform_data = flash;	sa11x0mtd_device.resource = res;	sa11x0mtd_device.num_resources = nr;}static struct resource sa11x0ir_resources[] = {	{		.start	= __PREG(Ser2UTCR0),		.end	= __PREG(Ser2UTCR0) + 0x24 - 1,		.flags	= IORESOURCE_MEM,	}, {		.start	= __PREG(Ser2HSCR0),		.end	= __PREG(Ser2HSCR0) + 0x1c - 1,		.flags	= IORESOURCE_MEM,	}, {		.start	= __PREG(Ser2HSCR2),		.end	= __PREG(Ser2HSCR2) + 0x04 - 1,		.flags	= IORESOURCE_MEM,	}, {		.start	= IRQ_Ser2ICP,		.end	= IRQ_Ser2ICP,		.flags	= IORESOURCE_IRQ,	}};static struct platform_device sa11x0ir_device = {	.name		= "sa11x0-ir",	.id		= -1,	.num_resources	= ARRAY_SIZE(sa11x0ir_resources),	.resource	= sa11x0ir_resources,};void sa11x0_set_irda_data(struct irda_platform_data *irda){	sa11x0ir_device.dev.platform_data = irda;}static struct platform_device sa11x0rtc_device = {	.name		= "sa1100-rtc",	.id		= -1,};static struct platform_device *sa11x0_devices[] __initdata = {	&sa11x0udc_device,	&sa11x0uart1_device,	&sa11x0uart3_device,	&sa11x0mcp_device,	&sa11x0ssp_device,	&sa11x0pcmcia_device,	&sa11x0fb_device,	&sa11x0mtd_device,	&sa11x0rtc_device,};static int __init sa1100_init(void){	pm_power_off = sa1100_power_off;	if (sa11x0ir_device.dev.platform_data)		platform_device_register(&sa11x0ir_device);	return platform_add_devices(sa11x0_devices, ARRAY_SIZE(sa11x0_devices));}arch_initcall(sa1100_init);void (*sa1100fb_backlight_power)(int on);void (*sa1100fb_lcd_power)(int on);EXPORT_SYMBOL(sa1100fb_backlight_power);EXPORT_SYMBOL(sa1100fb_lcd_power);/* * Common I/O mapping: * * Typically, static virtual address mappings are as follow: * * 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 * 0xffff2000-0xffff2fff:	Minicache copy_user_page area * * 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 = {  	{	/* PCM */		.virtual	=  0xf8000000,		.pfn		= __phys_to_pfn(0x80000000),		.length		= 0x00100000,		.type		= MT_DEVICE	}, {	/* SCM */		.virtual	=  0xfa000000,		.pfn		= __phys_to_pfn(0x90000000),		.length		= 0x00100000,		.type		= MT_DEVICE	}, {	/* MER */		.virtual	=  0xfc000000,		.pfn		= __phys_to_pfn(0xa0000000),		.length		= 0x00100000,		.type		= MT_DEVICE	}, {	/* LCD + DMA */		.virtual	=  0xfe000000,		.pfn		= __phys_to_pfn(0xb0000000),		.length		= 0x00200000,		.type		= MT_DEVICE	},};void __init sa1100_map_io(void){	iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));}/* * Disable the memory bus request/grant signals on the SA1110 to * ensure that we don't receive spurious memory requests.  We set * the MBGNT signal false to ensure the SA1111 doesn't own the * SDRAM bus. */void __init sa1110_mb_disable(void){	unsigned long flags;	local_irq_save(flags);		PGSR &= ~GPIO_MBGNT;	GPCR = GPIO_MBGNT;	GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;	GAFR &= ~(GPIO_MBGNT | GPIO_MBREQ);	local_irq_restore(flags);}/* * If the system is going to use the SA-1111 DMA engines, set up * the memory bus request/grant pins. */void __init sa1110_mb_enable(void){	unsigned long flags;	local_irq_save(flags);	PGSR &= ~GPIO_MBGNT;	GPCR = GPIO_MBGNT;	GPDR = (GPDR & ~GPIO_MBREQ) | GPIO_MBGNT;	GAFR |= (GPIO_MBGNT | GPIO_MBREQ);	TUCR |= TUCR_MR;	local_irq_restore(flags);}