172 lines
4.4 KiB
C
172 lines
4.4 KiB
C
/*
|
|
* 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_gpio_devs[0],
|
|
&u8500_gpio_devs[1],
|
|
&u8500_gpio_devs[2],
|
|
&u8500_gpio_devs[3],
|
|
&u8500_gpio_devs[4],
|
|
&u8500_gpio_devs[5],
|
|
&u8500_gpio_devs[6],
|
|
&u8500_gpio_devs[7],
|
|
&u8500_gpio_devs[8],
|
|
&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();
|
|
}
|
|
|
|
/*
|
|
* 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();
|
|
|
|
platform_add_devices(platform_devs, ARRAY_SIZE(platform_devs));
|
|
|
|
return ;
|
|
}
|