/*
* Copyright (C) 2008-2009 ST-Ericsson
*
* Author: Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com>
*
* 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/types.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/amba/bus.h>
#include <linux/irq.h>
#include <linux/gpio.h>
#include <linux/platform_device.h>
#include <linux/io.h>
#include <asm/mach/map.h>
#include <mach/hardware.h>
#include <mach/setup.h>
#include <mach/devices.h>
#include "devices-db8500.h"
static struct platform_device *platform_devs[] __initdata = {
&u8500_dma40_device,
};
/* minimum static i/o mapping required to boot U8500 platforms */
static struct map_desc u8500_io_desc[] __initdata = {
__IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K),
__IO_DEV_DESC(U8500_GPIO0_BASE, SZ_4K),
__IO_DEV_DESC(U8500_GPIO1_BASE, SZ_4K),
__IO_DEV_DESC(U8500_GPIO2_BASE, SZ_4K),
__IO_DEV_DESC(U8500_GPIO3_BASE, SZ_4K),
__MEM_DEV_DESC(U8500_BOOT_ROM_BASE, SZ_1M),
};
static struct map_desc u8500_ed_io_desc[] __initdata = {
__IO_DEV_DESC(U8500_MTU0_BASE_ED, SZ_4K),
__IO_DEV_DESC(U8500_CLKRST7_BASE_ED, SZ_8K),
};
static struct map_desc u8500_v1_io_desc[] __initdata = {
__IO_DEV_DESC(U8500_MTU0_BASE, SZ_4K),
__IO_DEV_DESC(U8500_PRCMU_TCDM_BASE_V1, SZ_4K),
};
static struct map_desc u8500_v2_io_desc[] __initdata = {
__IO_DEV_DESC(U8500_PRCMU_TCDM_BASE, SZ_4K),
};
/*
* Functions to differentiate between later ASICs
* We look into the end of the ROM to locate the hardcoded ASIC ID.
* This is only needed to differentiate between minor revisions and
* process variants of an ASIC, the major revisions are encoded in
* the cpuid.
*/
#define U8500_ASIC_ID_LOC_ED_V1 (U8500_BOOT_ROM_BASE + 0x1FFF4)
#define U8500_ASIC_ID_LOC_V2 (U8500_BOOT_ROM_BASE + 0x1DBF4)
#define U8500_ASIC_REV_ED 0x01
#define U8500_ASIC_REV_V10 0xA0
#define U8500_ASIC_REV_V11 0xA1
#define U8500_ASIC_REV_V20 0xB0
/**
* struct db8500_asic_id - fields of the ASIC ID
* @process: the manufacturing process, 0x40 is 40 nm
* 0x00 is "standard"
* @partnumber: hithereto 0x8500 for DB8500
* @revision: version code in the series
* This field definion is not formally defined but makes
* sense.
*/
struct db8500_asic_id {
u8 process;
u16 partnumber;
u8 revision;
};
/* This isn't going to change at runtime */
static struct db8500_asic_id db8500_id;
static void __init get_db8500_asic_id(void)
{
u32 asicid;
if (cpu_is_u8500v1() || cpu_is_u8500ed())
asicid = readl(__io_address(U8500_ASIC_ID_LOC_ED_V1));
else if (cpu_is_u8500v2())
asicid = readl(__io_address(U8500_ASIC_ID_LOC_V2));
else
BUG();
db8500_id.process = (asicid >> 24);
db8500_id.partnumber = (asicid >> 16) & 0xFFFFU;
db8500_id.revision = asicid & 0xFFU;
}
bool cpu_is_u8500v10(void)
{
return (db8500_id.revision == U8500_ASIC_REV_V10);
}
bool cpu_is_u8500v11(void)
{
return (db8500_id.revision == U8500_ASIC_REV_V11);
}
bool cpu_is_u8500v20(void)
{
return (db8500_id.revision == U8500_ASIC_REV_V20);
}
void __init u8500_map_io(void)
{
ux500_map_io();
iotable_init(u8500_io_desc, ARRAY_SIZE(u8500_io_desc));
if (cpu_is_u8500ed())
iotable_init(u8500_ed_io_desc, ARRAY_SIZE(u8500_ed_io_desc));
else if (cpu_is_u8500v1())
iotable_init(u8500_v1_io_desc, ARRAY_SIZE(u8500_v1_io_desc));
else if (cpu_is_u8500v2())
iotable_init(u8500_v2_io_desc, ARRAY_SIZE(u8500_v2_io_desc));
/* Read out the ASIC ID as early as we can */
get_db8500_asic_id();
}
static resource_size_t __initdata db8500_gpio_base[] = {
U8500_GPIOBANK0_BASE,
U8500_GPIOBANK1_BASE,
U8500_GPIOBANK2_BASE,
U8500_GPIOBANK3_BASE,
U8500_GPIOBANK4_BASE,
U8500_GPIOBANK5_BASE,
U8500_GPIOBANK6_BASE,
U8500_GPIOBANK7_BASE,
U8500_GPIOBANK8_BASE,
};
static void __init db8500_add_gpios(void)
{
struct nmk_gpio_platform_data pdata = {
/* No custom data yet */
};
dbx500_add_gpios(ARRAY_AND_SIZE(db8500_gpio_base),
IRQ_DB8500_GPIO0, &pdata);
}
/*
* This function is called from the board init
*/
void __init u8500_init_devices(void)
{
/* Display some ASIC boilerplate */
pr_info("DB8500: process: %02x, revision ID: 0x%02x\n",
db8500_id.process, db8500_id.revision);
if (cpu_is_u8500ed())
pr_info("DB8500: Early Drop (ED)\n");
else if (cpu_is_u8500v10())
pr_info("DB8500: version 1.0\n");
else if (cpu_is_u8500v11())
pr_info("DB8500: version 1.1\n");
else if (cpu_is_u8500v20())
pr_info("DB8500: version 2.0\n");
else
pr_warning("ASIC: UNKNOWN SILICON VERSION!\n");
if (cpu_is_u8500ed())
dma40_u8500ed_fixup();
db8500_add_rtc();
db8500_add_gpios();
platform_device_register_simple("cpufreq-u8500", -1, NULL, 0);
platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
return ;
}
