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ARM: 6331/1: ux500 cpu/SoC version macros v2

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This patch adds support for checking if the digital baseband (DB)
System-on-Chip (aka "cpu) ASIC hardware version is 1.0, 1.1 or
2.0. We print the result in the bootlog, the functions are then
used for runtime decisions based on hardware version.

Signed-off-by: Mattias Wallin <mattias.wallin@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Linus Walleij 2010-08-19 10:27:49 +01:00 committed by Russell King
parent 2bfc96a127
commit f946738ca8
4 changed files with 110 additions and 4 deletions
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82
arch/arm/mach-ux500/cpu-db8500.c
View File

@ -38,10 +38,12 @@ 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 = {
__IO_DEV_DESC(U8500_PRCMU_BASE, SZ_4K),
__IO_DEV_DESC(U8500_PRCMU_TCDM_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 u8500ed_io_desc[] __initdata = {
@ -53,6 +55,69 @@ static struct map_desc u8500v1_io_desc[] __initdata = {
__IO_DEV_DESC(U8500_MTU0_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();
@ -63,6 +128,9 @@ void __init u8500_map_io(void)
iotable_init(u8500ed_io_desc, ARRAY_SIZE(u8500ed_io_desc));
else
iotable_init(u8500v1_io_desc, ARRAY_SIZE(u8500v1_io_desc));
/* Read out the ASIC ID as early as we can */
get_db8500_asic_id();
}
/*
@ -70,6 +138,20 @@ void __init u8500_map_io(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");
ux500_init_devices();
if (cpu_is_u8500ed())

2
arch/arm/mach-ux500/include/mach/db8500-regs.h
View File

@ -30,8 +30,6 @@
#define U8500_ICN_BASE 0x81000000
#define U8500_BOOT_ROM_BASE 0x90000000
/* ASIC ID is at 0xff4 offset within this region */
#define U8500_ASIC_ID_BASE 0x9001F000
#define U8500_PER6_BASE 0xa03c0000
#define U8500_PER5_BASE 0xa03e0000

23
arch/arm/mach-ux500/include/mach/hardware.h
View File

@ -104,16 +104,35 @@ static inline bool cpu_is_u8500(void)
#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() & 15) == 0;
return cpu_is_u8500() && (read_cpuid_id() == CPUID_DB8500ED);
}
static inline bool cpu_is_u8500v1(void)
{
return cpu_is_u8500() && (read_cpuid_id() & 15) == 1;
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

7
arch/arm/mach-ux500/include/mach/setup.h
View File

@ -38,4 +38,11 @@ extern struct sys_timer ux500_timer;
.type = MT_DEVICE, \
}
#define __MEM_DEV_DESC(x, sz) { \
.virtual = IO_ADDRESS(x), \
.pfn = __phys_to_pfn(x), \
.length = sz, \
.type = MT_MEMORY, \
}
#endif /* __ASM_ARCH_SETUP_H */