diff options
| -rw-r--r-- | arch/arm/mach-ux500/cpu-db8500.c | 82 | ||||
| -rw-r--r-- | arch/arm/mach-ux500/include/mach/db8500-regs.h | 2 | ||||
| -rw-r--r-- | arch/arm/mach-ux500/include/mach/hardware.h | 23 | ||||
| -rw-r--r-- | arch/arm/mach-ux500/include/mach/setup.h | 7 |
4 files changed, 110 insertions, 4 deletions
diff --git a/arch/arm/mach-ux500/cpu-db8500.c b/arch/arm/mach-ux500/cpu-db8500.c index f21c444edd99..4acab7544b3c 100644 --- a/arch/arm/mach-ux500/cpu-db8500.c +++ b/arch/arm/mach-ux500/cpu-db8500.c @@ -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()) diff --git a/arch/arm/mach-ux500/include/mach/db8500-regs.h b/arch/arm/mach-ux500/include/mach/db8500-regs.h index f000218210c9..f07d0986409d 100644 --- a/arch/arm/mach-ux500/include/mach/db8500-regs.h +++ b/arch/arm/mach-ux500/include/mach/db8500-regs.h @@ -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 diff --git a/arch/arm/mach-ux500/include/mach/hardware.h b/arch/arm/mach-ux500/include/mach/hardware.h index 8656379a8309..32e883a8f2a2 100644 --- a/arch/arm/mach-ux500/include/mach/hardware.h +++ b/arch/arm/mach-ux500/include/mach/hardware.h @@ -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 diff --git a/arch/arm/mach-ux500/include/mach/setup.h b/arch/arm/mach-ux500/include/mach/setup.h index e978dbd9e210..54bbe648bf58 100644 --- a/arch/arm/mach-ux500/include/mach/setup.h +++ b/arch/arm/mach-ux500/include/mach/setup.h @@ -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 */ |