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linux/arch/arm/mach-pxa/generic.c
Richard Purdie e842f1c8ff [PATCH] RTC subsystem: SA1100/PXA2XX driver 
Add an RTC subsystem driver for the ARM SA1100/PXA2XX processor RTC.

Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-27 08:44:52 -08:00

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/*
* linux/arch/arm/mach-pxa/generic.c
*
* Author: Nicolas Pitre
* Created: Jun 15, 2001
* Copyright: MontaVista Software Inc.
*
* Code common to all PXA 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 PXA machines which can be overridden later if
* need be.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/platform_device.h>
#include <linux/ioport.h>
#include <linux/pm.h>
#include <linux/string.h>
#include <asm/hardware.h>
#include <asm/irq.h>
#include <asm/system.h>
#include <asm/pgtable.h>
#include <asm/mach/map.h>
#include <asm/arch/pxa-regs.h>
#include <asm/arch/udc.h>
#include <asm/arch/pxafb.h>
#include <asm/arch/mmc.h>
#include <asm/arch/irda.h>
#include <asm/arch/i2c.h>
#include "generic.h"
/*
* Handy function to set GPIO alternate functions
*/
void pxa_gpio_mode(int gpio_mode)
{
unsigned long flags;
int gpio = gpio_mode & GPIO_MD_MASK_NR;
int fn = (gpio_mode & GPIO_MD_MASK_FN) >> 8;
int gafr;
local_irq_save(flags);
if (gpio_mode & GPIO_DFLT_LOW)
GPCR(gpio) = GPIO_bit(gpio);
else if (gpio_mode & GPIO_DFLT_HIGH)
GPSR(gpio) = GPIO_bit(gpio);
if (gpio_mode & GPIO_MD_MASK_DIR)
GPDR(gpio) |= GPIO_bit(gpio);
else
GPDR(gpio) &= ~GPIO_bit(gpio);
gafr = GAFR(gpio) & ~(0x3 << (((gpio) & 0xf)*2));
GAFR(gpio) = gafr | (fn << (((gpio) & 0xf)*2));
local_irq_restore(flags);
}
EXPORT_SYMBOL(pxa_gpio_mode);
/*
* Routine to safely enable or disable a clock in the CKEN
*/
void pxa_set_cken(int clock, int enable)
{
unsigned long flags;
local_irq_save(flags);
if (enable)
CKEN |= clock;
else
CKEN &= ~clock;
local_irq_restore(flags);
}
EXPORT_SYMBOL(pxa_set_cken);
/*
* Intel PXA2xx internal register mapping.
*
* Note 1: not all PXA2xx variants implement all those addresses.
*
* Note 2: virtual 0xfffe0000-0xffffffff is reserved for the vector table
* and cache flush area.
*/
static struct map_desc standard_io_desc[] __initdata = {
{ /* Devs */
.virtual = 0xf2000000,
.pfn = __phys_to_pfn(0x40000000),
.length = 0x02000000,
.type = MT_DEVICE
}, { /* LCD */
.virtual = 0xf4000000,
.pfn = __phys_to_pfn(0x44000000),
.length = 0x00100000,
.type = MT_DEVICE
}, { /* Mem Ctl */
.virtual = 0xf6000000,
.pfn = __phys_to_pfn(0x48000000),
.length = 0x00100000,
.type = MT_DEVICE
}, { /* USB host */
.virtual = 0xf8000000,
.pfn = __phys_to_pfn(0x4c000000),
.length = 0x00100000,
.type = MT_DEVICE
}, { /* Camera */
.virtual = 0xfa000000,
.pfn = __phys_to_pfn(0x50000000),
.length = 0x00100000,
.type = MT_DEVICE
}, { /* IMem ctl */
.virtual = 0xfe000000,
.pfn = __phys_to_pfn(0x58000000),
.length = 0x00100000,
.type = MT_DEVICE
}, { /* UNCACHED_PHYS_0 */
.virtual = 0xff000000,
.pfn = __phys_to_pfn(0x00000000),
.length = 0x00100000,
.type = MT_DEVICE
}
};
void __init pxa_map_io(void)
{
iotable_init(standard_io_desc, ARRAY_SIZE(standard_io_desc));
get_clk_frequency_khz(1);
}
static struct resource pxamci_resources[] = {
[0] = {
.start = 0x41100000,
.end = 0x41100fff,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_MMC,
.end = IRQ_MMC,
.flags = IORESOURCE_IRQ,
},
};
static u64 pxamci_dmamask = 0xffffffffUL;
static struct platform_device pxamci_device = {
.name = "pxa2xx-mci",
.id = -1,
.dev = {
.dma_mask = &pxamci_dmamask,
.coherent_dma_mask = 0xffffffff,
},
.num_resources = ARRAY_SIZE(pxamci_resources),
.resource = pxamci_resources,
};
void __init pxa_set_mci_info(struct pxamci_platform_data *info)
{
pxamci_device.dev.platform_data = info;
}
static struct pxa2xx_udc_mach_info pxa_udc_info;
void __init pxa_set_udc_info(struct pxa2xx_udc_mach_info *info)
{
memcpy(&pxa_udc_info, info, sizeof *info);
}
static struct resource pxa2xx_udc_resources[] = {
[0] = {
.start = 0x40600000,
.end = 0x4060ffff,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_USB,
.end = IRQ_USB,
.flags = IORESOURCE_IRQ,
},
};
static u64 udc_dma_mask = ~(u32)0;
static struct platform_device udc_device = {
.name = "pxa2xx-udc",
.id = -1,
.resource = pxa2xx_udc_resources,
.num_resources = ARRAY_SIZE(pxa2xx_udc_resources),
.dev = {
.platform_data = &pxa_udc_info,
.dma_mask = &udc_dma_mask,
}
};
static struct pxafb_mach_info pxa_fb_info;
void __init set_pxa_fb_info(struct pxafb_mach_info *hard_pxa_fb_info)
{
memcpy(&pxa_fb_info,hard_pxa_fb_info,sizeof(struct pxafb_mach_info));
}
static struct resource pxafb_resources[] = {
[0] = {
.start = 0x44000000,
.end = 0x4400ffff,
.flags = IORESOURCE_MEM,
},
[1] = {
.start = IRQ_LCD,
.end = IRQ_LCD,
.flags = IORESOURCE_IRQ,
},
};
static u64 fb_dma_mask = ~(u64)0;
static struct platform_device pxafb_device = {
.name = "pxa2xx-fb",
.id = -1,
.dev = {
.platform_data = &pxa_fb_info,
.dma_mask = &fb_dma_mask,
.coherent_dma_mask = 0xffffffff,
},
.num_resources = ARRAY_SIZE(pxafb_resources),
.resource = pxafb_resources,
};
void __init set_pxa_fb_parent(struct device *parent_dev)
{
pxafb_device.dev.parent = parent_dev;
}
static struct platform_device ffuart_device = {
.name = "pxa2xx-uart",
.id = 0,
};
static struct platform_device btuart_device = {
.name = "pxa2xx-uart",
.id = 1,
};
static struct platform_device stuart_device = {
.name = "pxa2xx-uart",
.id = 2,
};
static struct platform_device hwuart_device = {
.name = "pxa2xx-uart",
.id = 3,
};
static struct resource i2c_resources[] = {
{
.start = 0x40301680,
.end = 0x403016a3,
.flags = IORESOURCE_MEM,
}, {
.start = IRQ_I2C,
.end = IRQ_I2C,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device i2c_device = {
.name = "pxa2xx-i2c",
.id = 0,
.resource = i2c_resources,
.num_resources = ARRAY_SIZE(i2c_resources),
};
void __init pxa_set_i2c_info(struct i2c_pxa_platform_data *info)
{
i2c_device.dev.platform_data = info;
}
static struct resource i2s_resources[] = {
{
.start = 0x40400000,
.end = 0x40400083,
.flags = IORESOURCE_MEM,
}, {
.start = IRQ_I2S,
.end = IRQ_I2S,
.flags = IORESOURCE_IRQ,
},
};
static struct platform_device i2s_device = {
.name = "pxa2xx-i2s",
.id = -1,
.resource = i2s_resources,
.num_resources = ARRAY_SIZE(i2s_resources),
};
static u64 pxaficp_dmamask = ~(u32)0;
static struct platform_device pxaficp_device = {
.name = "pxa2xx-ir",
.id = -1,
.dev = {
.dma_mask = &pxaficp_dmamask,
.coherent_dma_mask = 0xffffffff,
},
};
void __init pxa_set_ficp_info(struct pxaficp_platform_data *info)
{
pxaficp_device.dev.platform_data = info;
}
static struct platform_device pxartc_device = {
.name = "sa1100-rtc",
.id = -1,
};
static struct platform_device *devices[] __initdata = {
&pxamci_device,
&udc_device,
&pxafb_device,
&ffuart_device,
&btuart_device,
&stuart_device,
&pxaficp_device,
&i2c_device,
&i2s_device,
&pxartc_device,
};
static int __init pxa_init(void)
{
int cpuid, ret;
ret = platform_add_devices(devices, ARRAY_SIZE(devices));
if (ret)
return ret;
/* Only add HWUART for PXA255/26x; PXA210/250/27x do not have it. */
cpuid = read_cpuid(CPUID_ID);
if (((cpuid >> 4) & 0xfff) == 0x2d0 ||
((cpuid >> 4) & 0xfff) == 0x290)
ret = platform_device_register(&hwuart_device);
return ret;
}
subsys_initcall(pxa_init);
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