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ux500: dynamic SOC detection 

Dynamically detect the DBx500 SOC an revision based on the ASIC ID.

Signed-off-by: Rabin Vincent <rabin.vincent@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
This commit is contained in:
Rabin Vincent 2010-12-08 11:07:59 +05:30 committed by Linus Walleij
parent 5dc55e0a39
commit abf12d719a
8 changed files with 213 additions and 137 deletions
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3
arch/arm/mach-ux500/Makefile
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@ -2,7 +2,8 @@
# Makefile for the linux kernel, U8500 machine.
#
obj-y := clock.o cpu.o devices.o devices-common.o
obj-y := clock.o cpu.o devices.o devices-common.o \
id.o
obj-$(CONFIG_UX500_SOC_DB5500) += cpu-db5500.o dma-db5500.o
obj-$(CONFIG_UX500_SOC_DB8500) += cpu-db8500.o devices-db8500.o prcmu.o
obj-$(CONFIG_MACH_U8500) += board-mop500.o board-mop500-sdi.o \

12
arch/arm/mach-ux500/cpu-db5500.c
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@ -21,9 +21,12 @@
#include "devices-db5500.h"
static struct map_desc u5500_io_desc[] __initdata = {
static struct map_desc u5500_uart_io_desc[] __initdata = {
__IO_DEV_DESC(U5500_UART0_BASE, SZ_4K),
__IO_DEV_DESC(U5500_UART2_BASE, SZ_4K),
};
static struct map_desc u5500_io_desc[] __initdata = {
__IO_DEV_DESC(U5500_GIC_CPU_BASE, SZ_4K),
__IO_DEV_DESC(U5500_GIC_DIST_BASE, SZ_4K),
__IO_DEV_DESC(U5500_L2CC_BASE, SZ_4K),
@ -153,6 +156,13 @@ static void __init db5500_add_gpios(void)
void __init u5500_map_io(void)
{
/*
* Map the UARTs early so that the DEBUG_LL stuff continues to work.
*/
iotable_init(u5500_uart_io_desc, ARRAY_SIZE(u5500_uart_io_desc));
ux500_map_io();
iotable_init(u5500_io_desc, ARRAY_SIZE(u5500_io_desc));
}

93
arch/arm/mach-ux500/cpu-db8500.c
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@ -29,9 +29,12 @@ static struct platform_device *platform_devs[] __initdata = {
};
/* minimum static i/o mapping required to boot U8500 platforms */
static struct map_desc u8500_io_desc[] __initdata = {
static struct map_desc u8500_uart_io_desc[] __initdata = {
__IO_DEV_DESC(U8500_UART0_BASE, SZ_4K),
__IO_DEV_DESC(U8500_UART2_BASE, SZ_4K),
};
static struct map_desc u8500_io_desc[] __initdata = {
__IO_DEV_DESC(U8500_GIC_CPU_BASE, SZ_4K),
__IO_DEV_DESC(U8500_GIC_DIST_BASE, SZ_4K),
__IO_DEV_DESC(U8500_L2CC_BASE, SZ_4K),
@ -51,7 +54,6 @@ static struct map_desc u8500_io_desc[] __initdata = {
__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 = {
@ -68,71 +70,15 @@ 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)
{
/*
* Map the UARTs early so that the DEBUG_LL stuff continues to work.
*/
iotable_init(u8500_uart_io_desc, ARRAY_SIZE(u8500_uart_io_desc));
ux500_map_io();
iotable_init(u8500_io_desc, ARRAY_SIZE(u8500_io_desc));
if (cpu_is_u8500ed())
@ -141,9 +87,6 @@ void __init u8500_map_io(void)
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[] = {
@ -173,20 +116,6 @@ static void __init db8500_add_gpios(void)
*/
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();

4
arch/arm/mach-ux500/cpu.c
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@ -27,10 +27,6 @@
static void __iomem *l2x0_base;
#endif
void __init ux500_map_io(void)
{
}
void __init ux500_init_irq(void)
{
void __iomem *dist_base;

107
arch/arm/mach-ux500/id.c Normal file
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@ -0,0 +1,107 @@
/*
* Copyright (C) ST-Ericsson SA 2010
*
* Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
* License terms: GNU General Public License (GPL) version 2
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/io.h>
#include <asm/cputype.h>
#include <asm/tlbflush.h>
#include <asm/cacheflush.h>
#include <asm/mach/map.h>
#include <mach/hardware.h>
#include <mach/setup.h>
struct dbx500_asic_id dbx500_id;
static unsigned int ux500_read_asicid(phys_addr_t addr)
{
phys_addr_t base = addr & ~0xfff;
struct map_desc desc = {
.virtual = IO_ADDRESS(base),
.pfn = __phys_to_pfn(base),
.length = SZ_16K,
.type = MT_DEVICE,
};
iotable_init(&desc, 1);
/* As in devicemaps_init() */
local_flush_tlb_all();
flush_cache_all();
return readl(__io_address(addr));
}
static void ux500_print_soc_info(unsigned int asicid)
{
unsigned int rev = dbx500_revision();
pr_info("DB%4x ", dbx500_partnumber());
if (rev == 0x01)
pr_cont("Early Drop");
else if (rev >= 0xA0)
pr_cont("v%d.%d" , (rev >> 4) - 0xA + 1, rev & 0xf);
else
pr_cont("Unknown");
pr_cont(" [%#010x]\n", asicid);
}
static unsigned int partnumber(unsigned int asicid)
{
return (asicid >> 8) & 0xffff;
}
/*
* SOC MIDR ASICID ADDRESS ASICID VALUE
* DB8500ed 0x410fc090 0x9001FFF4 0x00850001
* DB8500v1 0x411fc091 0x9001FFF4 0x008500A0
* DB8500v1.1 0x411fc091 0x9001FFF4 0x008500A1
* DB8500v2 0x412fc091 0x9001DBF4 0x008500B0
* DB5500v1 0x412fc091 0x9001FFF4 0x005500A0
*/
void __init ux500_map_io(void)
{
unsigned int cpuid = read_cpuid_id();
unsigned int asicid = 0;
phys_addr_t addr = 0;
switch (cpuid) {
case 0x410fc090: /* DB8500ed */
case 0x411fc091: /* DB8500v1 */
addr = 0x9001FFF4;
break;
case 0x412fc091: /* DB8500v2 / DB5500v1 */
asicid = ux500_read_asicid(0x9001DBF4);
if (partnumber(asicid) == 0x8500)
/* DB8500v2 */
break;
/* DB5500v1 */
addr = 0x9001FFF4;
break;
}
if (addr)
asicid = ux500_read_asicid(addr);
if (!asicid) {
pr_err("Unable to identify SoC\n");
ux500_unknown_soc();
}
dbx500_id.process = asicid >> 24;
dbx500_id.partnumber = partnumber(asicid);
dbx500_id.revision = asicid & 0xff;
ux500_print_soc_info(asicid);
}

50
arch/arm/mach-ux500/include/mach/hardware.h
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@ -34,57 +34,9 @@
#ifndef __ASSEMBLY__
#include <asm/cputype.h>
static inline bool cpu_is_u8500(void)
{
#ifdef CONFIG_UX500_SOC_DB8500
return 1;
#else
return 0;
#endif
}
#define CPUID_DB8500ED 0x410fc090
#define CPUID_DB8500V1 0x411fc091
#define CPUID_DB8500V2 0x412fc091
static inline bool cpu_is_u8500ed(void)
{
return cpu_is_u8500() && (read_cpuid_id() == CPUID_DB8500ED);
}
static inline bool cpu_is_u8500v1(void)
{
return cpu_is_u8500() && (read_cpuid_id() == CPUID_DB8500V1);
}
static inline bool cpu_is_u8500v2(void)
{
return cpu_is_u8500() && (read_cpuid_id() == CPUID_DB8500V2);
}
#ifdef CONFIG_UX500_SOC_DB8500
bool cpu_is_u8500v10(void);
bool cpu_is_u8500v11(void);
bool cpu_is_u8500v20(void);
#else
static inline bool cpu_is_u8500v10(void) { return false; }
static inline bool cpu_is_u8500v11(void) { return false; }
static inline bool cpu_is_u8500v20(void) { return false; }
#endif
static inline bool cpu_is_u5500(void)
{
#ifdef CONFIG_UX500_SOC_DB5500
return 1;
#else
return 0;
#endif
}
#include <mach/id.h>
#define ARRAY_AND_SIZE(x) (x), ARRAY_SIZE(x)
#define ux500_unknown_soc() BUG()
#endif

80
arch/arm/mach-ux500/include/mach/id.h Normal file
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@ -0,0 +1,80 @@
/*
* Copyright (C) ST-Ericsson SA 2010
*
* Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
* License terms: GNU General Public License (GPL) version 2
*/
#ifndef __MACH_UX500_ID
#define __MACH_UX500_ID
/**
* struct dbx500_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
*/
struct dbx500_asic_id {
u16 partnumber;
u8 revision;
u8 process;
};
extern struct dbx500_asic_id dbx500_id;
static inline unsigned int __attribute_const__ dbx500_partnumber(void)
{
return dbx500_id.partnumber;
}
static inline unsigned int __attribute_const__ dbx500_revision(void)
{
return dbx500_id.revision;
}
/*
* SOCs
*/
static inline bool __attribute_const__ cpu_is_u8500(void)
{
return dbx500_partnumber() == 0x8500;
}
static inline bool __attribute_const__ cpu_is_u5500(void)
{
return dbx500_partnumber() == 0x5500;
}
/*
* 8500 revisions
*/
static inline bool __attribute_const__ cpu_is_u8500ed(void)
{
return cpu_is_u8500() && dbx500_revision() == 0x00;
}
static inline bool __attribute_const__ cpu_is_u8500v1(void)
{
return cpu_is_u8500() && (dbx500_revision() & 0xf0) == 0xA0;
}
static inline bool __attribute_const__ cpu_is_u8500v10(void)
{
return cpu_is_u8500() && dbx500_revision() == 0xA0;
}
static inline bool __attribute_const__ cpu_is_u8500v11(void)
{
return cpu_is_u8500() && dbx500_revision() == 0xA1;
}
static inline bool __attribute_const__ cpu_is_u8500v2(void)
{
return cpu_is_u8500() && ((dbx500_revision() & 0xf0) == 0xB0);
}
#define ux500_unknown_soc() BUG()
#endif

1
arch/arm/mach-ux500/include/mach/setup.h
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@ -14,6 +14,7 @@
#include <asm/mach/time.h>
#include <linux/init.h>
void __init ux500_map_io(void);
extern void __init u5500_map_io(void);
extern void __init u8500_map_io(void);