Signed-off-by: Aneesh V aneesh@ti.com --- V2: * Added a revision string in addition to the revision number Helps in printing out the OMAP revision at bootup
V3: * Improved the revision check function by saving the value instead of finding it every time. * Improved revision string function by generating it from the revision rather than hard-coding the string per revision --- arch/arm/cpu/armv7/omap4/board.c | 64 +++++++++++++++++++++++++++ arch/arm/include/asm/arch-omap4/omap4.h | 29 +++++++++--- arch/arm/include/asm/arch-omap4/sys_proto.h | 7 +++ arch/arm/include/asm/armv7.h | 5 ++ 4 files changed, 97 insertions(+), 8 deletions(-)
diff --git a/arch/arm/cpu/armv7/omap4/board.c b/arch/arm/cpu/armv7/omap4/board.c index 3fd6f84..09861a9 100644 --- a/arch/arm/cpu/armv7/omap4/board.c +++ b/arch/arm/cpu/armv7/omap4/board.c @@ -28,6 +28,7 @@ * MA 02111-1307 USA */ #include <common.h> +#include <asm/armv7.h> #include <asm/arch/cpu.h> #include <asm/arch/sys_proto.h> #include <asm/sizes.h> @@ -35,6 +36,8 @@
DECLARE_GLOBAL_DATA_PTR;
+u32 *const omap4_revision = (u32 *)OMAP4_SRAM_SCRATCH_OMAP4_REV; + void do_set_mux(u32 base, struct pad_conf_entry const *array, int size) { int i; @@ -72,6 +75,66 @@ static void set_mux_conf_regs(void) } }
+static u32 cortex_a9_rev(void) +{ + + unsigned int rev; + + /* Read Main ID Register (MIDR) */ + asm ("mrc p15, 0, %0, c0, c0, 0" : "=r" (rev)); + + return rev; +} + +static void init_omap4_revision(void) +{ + /* + * For some of the ES2/ES1 boards ID_CODE is not reliable: + * Also, ES1 and ES2 have different ARM revisions + * So use ARM revision for identification + */ + unsigned int arm_rev = cortex_a9_rev(); + + switch (arm_rev) { + case MIDR_CORTEX_A9_R0P1: + *omap4_revision = OMAP4430_ES1_0; + break; + case MIDR_CORTEX_A9_R1P2: + switch (readl(CONTROL_ID_CODE)) { + case OMAP4_CONTROL_ID_CODE_ES2_0: + *omap4_revision = OMAP4430_ES2_0; + break; + case OMAP4_CONTROL_ID_CODE_ES2_1: + *omap4_revision = OMAP4430_ES2_1; + break; + case OMAP4_CONTROL_ID_CODE_ES2_2: + *omap4_revision = OMAP4430_ES2_2; + break; + default: + *omap4_revision = OMAP4430_ES2_0; + break; + } + break; + case MIDR_CORTEX_A9_R1P3: + *omap4_revision = OMAP4430_ES2_3; + break; + default: + *omap4_revision = OMAP4430_SILICON_ID_INVALID; + break; + } +} + +void omap_rev_string(char *omap4_rev_string) +{ + u32 omap4_rev = omap_revision(); + u32 omap4_variant = (omap4_rev & 0xFFFF0000) >> 16; + u32 major_rev = (omap4_rev & 0x00000F00) >> 8; + u32 minor_rev = (omap4_rev & 0x000000F0) >> 4; + + sprintf(omap4_rev_string, "OMAP%x ES%x.%x", omap4_variant, major_rev, + minor_rev); +} + /* * Routine: s_init * Description: Does early system init of watchdog, muxing, andclocks @@ -88,6 +151,7 @@ static void set_mux_conf_regs(void) */ void s_init(void) { + init_omap4_revision(); watchdog_init(); set_mux_conf_regs(); } diff --git a/arch/arm/include/asm/arch-omap4/omap4.h b/arch/arm/include/asm/arch-omap4/omap4.h index a30bb33..76b06c2 100644 --- a/arch/arm/include/asm/arch-omap4/omap4.h +++ b/arch/arm/include/asm/arch-omap4/omap4.h @@ -51,6 +51,15 @@ #define CONTROL_PADCONF_CORE (OMAP44XX_L4_CORE_BASE + 0x100000) #define CONTROL_PADCONF_WKUP (OMAP44XX_L4_CORE_BASE + 0x31E000)
+/* CONTROL_ID_CODE */ +#define CONTROL_ID_CODE 0x4A002204 + +#define OMAP4_CONTROL_ID_CODE_ES1_0 0x0B85202F +#define OMAP4_CONTROL_ID_CODE_ES2_0 0x1B85202F +#define OMAP4_CONTROL_ID_CODE_ES2_1 0x3B95C02F +#define OMAP4_CONTROL_ID_CODE_ES2_2 0x4B95C02F +#define OMAP4_CONTROL_ID_CODE_ES2_3 0x6B95C02F + /* UART */ #define UART1_BASE (OMAP44XX_L4_PER_BASE + 0x6a000) #define UART2_BASE (OMAP44XX_L4_PER_BASE + 0x6c000) @@ -119,13 +128,17 @@ struct s32ktimer { /* base address for indirect vectors (internal boot mode) */ #define SRAM_ROM_VECT_BASE 0x4030D000 /* Temporary SRAM stack used while low level init is done */ -#define LOW_LEVEL_SRAM_STACK NON_SECURE_SRAM_END - -/* - * OMAP4 real hardware: - * TODO: Change this to the IDCODE in the hw regsiter - */ -#define CPU_OMAP4430_ES10 1 -#define CPU_OMAP4430_ES20 2 +#define LOW_LEVEL_SRAM_STACK NON_SECURE_SRAM_END +#define SRAM_SCRATCH_SPACE_ADDR NON_SECURE_SRAM_START +/* SRAM scratch space entries */ +#define OMAP4_SRAM_SCRATCH_OMAP4_REV SRAM_SCRATCH_SPACE_ADDR + +/* Silicon revisions */ +#define OMAP4430_SILICON_ID_INVALID 0xFFFFFFFF +#define OMAP4430_ES1_0 0x44300100 +#define OMAP4430_ES2_0 0x44300200 +#define OMAP4430_ES2_1 0x44300210 +#define OMAP4430_ES2_2 0x44300220 +#define OMAP4430_ES2_3 0x44300230
#endif diff --git a/arch/arm/include/asm/arch-omap4/sys_proto.h b/arch/arm/include/asm/arch-omap4/sys_proto.h index 3624378..c10fa18 100644 --- a/arch/arm/include/asm/arch-omap4/sys_proto.h +++ b/arch/arm/include/asm/arch-omap4/sys_proto.h @@ -40,6 +40,7 @@ void sr32(void *, u32, u32, u32); u32 wait_on_value(u32, u32, void *, u32); void sdelay(unsigned long); void set_pl310_ctrl_reg(u32 val); +void omap_rev_string(char *omap4_rev_string);
static inline u32 running_from_sdram(void) { @@ -88,4 +89,10 @@ static inline u32 omap4_hw_init_context(void) #endif }
+static inline u32 omap_revision(void) +{ + extern u32 *const omap4_revision; + return *omap4_revision; +} + #endif diff --git a/arch/arm/include/asm/armv7.h b/arch/arm/include/asm/armv7.h index 88b9c62..b5784d8 100644 --- a/arch/arm/include/asm/armv7.h +++ b/arch/arm/include/asm/armv7.h @@ -25,6 +25,11 @@ #define ARMV7_H #include <linux/types.h>
+/* Cortex-A9 revisions */ +#define MIDR_CORTEX_A9_R0P1 0x410FC091 +#define MIDR_CORTEX_A9_R1P2 0x411FC092 +#define MIDR_CORTEX_A9_R1P3 0x411FC093 + /* CCSIDR */ #define CCSIDR_LINE_SIZE_OFFSET 0 #define CCSIDR_LINE_SIZE_MASK 0x7