From: Imre Deak Date: Fri, 28 Oct 2005 17:05:00 +0000 (-0700) Subject: [PATCH] ARM: OMAP: OMAP2 CPU identification X-Git-Tag: v2.6.15-omap2~123 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=11825ff4104ef76c9e7769d54ab7e3314dc65a19;p=linux-2.6-omap-h63xx.git [PATCH] ARM: OMAP: OMAP2 CPU identification I put together this basic OMAP2 identification code, since I would need to distinguish between 2410 and 2420. The second patch makes an attempt to fix up places where cpu_is_omap2420() is used, replacing them with the newly introduced more type specific macros. These are based on comments in the code. --- diff --git a/arch/arm/mach-omap1/id.c b/arch/arm/mach-omap1/id.c index fad195510e7..5c637c04836 100644 --- a/arch/arm/mach-omap1/id.c +++ b/arch/arm/mach-omap1/id.c @@ -18,6 +18,13 @@ #include +#define OMAP_DIE_ID_0 0xfffe1800 +#define OMAP_DIE_ID_1 0xfffe1804 +#define OMAP_PRODUCTION_ID_0 0xfffe2000 +#define OMAP_PRODUCTION_ID_1 0xfffe2004 +#define OMAP32_ID_0 0xfffed400 +#define OMAP32_ID_1 0xfffed404 + struct omap_id { u16 jtag_id; /* Used to determine OMAP type */ u8 die_rev; /* Processor revision */ diff --git a/arch/arm/mach-omap2/Makefile b/arch/arm/mach-omap2/Makefile index 471d1d78314..42041166435 100644 --- a/arch/arm/mach-omap2/Makefile +++ b/arch/arm/mach-omap2/Makefile @@ -3,7 +3,7 @@ # # Common support -obj-y := irq.o io.o sram-fn.o clock.o mux.o devices.o serial.o +obj-y := irq.o id.o io.o sram-fn.o clock.o mux.o devices.o serial.o obj-$(CONFIG_OMAP_MPU_TIMER) += timer-gp.o diff --git a/arch/arm/mach-omap2/id.c b/arch/arm/mach-omap2/id.c new file mode 100644 index 00000000000..76187300f2b --- /dev/null +++ b/arch/arm/mach-omap2/id.c @@ -0,0 +1,124 @@ +/* + * linux/arch/arm/mach-omap2/id.c + * + * OMAP2 CPU identification code + * + * Copyright (C) 2005 Nokia Corporation + * Written by Tony Lindgren + * + * 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 +#include +#include +#include + +#include + +#define OMAP24XX_TAP_BASE io_p2v(0x48014000) + +#define OMAP_TAP_IDCODE 0x0204 +#define OMAP_TAP_PROD_ID 0x0208 + +#define OMAP_TAP_DIE_ID_0 0x0218 +#define OMAP_TAP_DIE_ID_1 0x021C +#define OMAP_TAP_DIE_ID_2 0x0220 +#define OMAP_TAP_DIE_ID_3 0x0224 + +/* system_rev fields for OMAP2 processors: + * CPU id bits [31:16], + * CPU device type [15:12], (unprg,normal,POP) + * CPU revision [11:08] + * CPU class bits [07:00] + */ + +struct omap_id { + u16 hawkeye; /* Silicon type (Hawkeye id) */ + u8 dev; /* Device type from production_id reg */ + u32 type; /* combined type id copied to system_rev */ +}; + +/* Register values to detect the OMAP version */ +static struct omap_id omap_ids[] __initdata = { + { .hawkeye = 0xb5d9, .dev = 0x0, .type = 0x24200000 }, + { .hawkeye = 0xb5d9, .dev = 0x1, .type = 0x24201000 }, + { .hawkeye = 0xb5d9, .dev = 0x2, .type = 0x24202000 }, + { .hawkeye = 0xb5d9, .dev = 0x4, .type = 0x24220000 }, + { .hawkeye = 0xb5d9, .dev = 0x8, .type = 0x24230000 }, + { .hawkeye = 0xb68a, .dev = 0x0, .type = 0x24300000 }, +}; + +static u32 __init read_tap_reg(int reg) +{ + return __raw_readl(OMAP24XX_TAP_BASE + reg); +} + +void __init omap2_check_revision(void) +{ + int i, j; + u32 idcode; + u32 prod_id; + u16 hawkeye; + u8 dev_type; + u8 rev; + + idcode = read_tap_reg(OMAP_TAP_IDCODE); + prod_id = read_tap_reg(OMAP_TAP_PROD_ID); + hawkeye = (idcode >> 12) & 0xffff; + rev = (idcode >> 28) & 0x0f; + dev_type = (prod_id >> 16) & 0x0f; + +#ifdef DEBUG + printk(KERN_DEBUG "OMAP_TAP_IDCODE 0x%08x REV %i HAWKEYE 0x%04x MANF %03x\n", + idcode, rev, hawkeye, (idcode >> 1) & 0x7ff); + printk(KERN_DEBUG "OMAP_TAP_DIE_ID_0: 0x%08x\n", + read_tap_reg(OMAP_TAP_DIE_ID_0)); + printk(KERN_DEBUG "OMAP_TAP_DIE_ID_1: 0x%08x DEV_REV: %i\n", + read_tap_reg(OMAP_TAP_DIE_ID_1), + (read_tap_reg(OMAP_TAP_DIE_ID_1) >> 28) & 0xf); + printk(KERN_DEBUG "OMAP_TAP_DIE_ID_2: 0x%08x\n", + read_tap_reg(OMAP_TAP_DIE_ID_2)); + printk(KERN_DEBUG "OMAP_TAP_DIE_ID_3: 0x%08x\n", + read_tap_reg(OMAP_TAP_DIE_ID_3)); + printk(KERN_DEBUG "OMAP_TAP_PROD_ID_0: 0x%08x DEV_TYPE: %i\n", + prod_id, dev_type); +#endif + + /* Check hawkeye ids */ + for (i = 0; i < ARRAY_SIZE(omap_ids); i++) { + if (hawkeye == omap_ids[i].hawkeye) + break; + } + + if (i == ARRAY_SIZE(omap_ids)) { + printk(KERN_ERR "Unknown OMAP CPU id\n"); + return; + } + + for (j = i; j < ARRAY_SIZE(omap_ids); j++) { + if (dev_type == omap_ids[j].dev) + break; + } + + if (j == ARRAY_SIZE(omap_ids)) { + printk(KERN_ERR "Unknown OMAP device type. " + "Handling it as OMAP%04x\n", + omap_ids[i].type >> 16); + j = i; + } + system_rev = omap_ids[j].type; + + system_rev |= rev << 8; + + /* Add the cpu class info (24xx) */ + system_rev |= 0x24; + + pr_info("OMAP%04x", system_rev >> 16); + if ((system_rev >> 8) & 0x0f) + printk("%x", (system_rev >> 8) & 0x0f); + printk("\n"); +} + diff --git a/arch/arm/mach-omap2/io.c b/arch/arm/mach-omap2/io.c index 719ca4c6ab3..99492c64d90 100644 --- a/arch/arm/mach-omap2/io.c +++ b/arch/arm/mach-omap2/io.c @@ -22,6 +22,7 @@ extern void omap_sram_init(void); extern int omap2_clk_init(void); +extern void omap2_check_revision(void); /* * The machine specific code may provide the extra mapping besides the @@ -35,6 +36,7 @@ static struct map_desc omap2_io_desc[] __initdata = { void __init omap_map_common_io(void) { iotable_init(omap2_io_desc, ARRAY_SIZE(omap2_io_desc)); + omap2_check_revision(); omap_sram_init(); omap2_mux_init(); omap2_clk_init(); diff --git a/include/asm-arm/arch-omap/cpu.h b/include/asm-arm/arch-omap/cpu.h index fbca3a9484b..d115ca02bdc 100644 --- a/include/asm-arm/arch-omap/cpu.h +++ b/include/asm-arm/arch-omap/cpu.h @@ -28,12 +28,7 @@ extern unsigned int system_rev; -#define OMAP_DIE_ID_0 0xfffe1800 -#define OMAP_DIE_ID_1 0xfffe1804 -#define OMAP_PRODUCTION_ID_0 0xfffe2000 -#define OMAP_PRODUCTION_ID_1 0xfffe2004 -#define OMAP32_ID_0 0xfffed400 -#define OMAP32_ID_1 0xfffed404 +#define omap2_cpu_rev() ((system_rev >> 8) & 0x0f) /* * Test if multicore OMAP support is needed @@ -81,7 +76,9 @@ extern unsigned int system_rev; * cpu_is_omap7xx(): True for OMAP730 * cpu_is_omap15xx(): True for OMAP1510, OMAP5910 and OMAP310 * cpu_is_omap16xx(): True for OMAP1610, OMAP5912 and OMAP1710 - * cpu_is_omap24xx(): True for OMAP2420 + * cpu_is_omap24xx(): True for OMAP2420, OMAP2422, OMAP2423, OMAP2430 + * cpu_is_omap242x(): True for OMAP2420, OMAP2422, OMAP2423 + * cpu_is_omap243x(): True for OMAP2430 */ #define GET_OMAP_CLASS (system_rev & 0xff) @@ -91,15 +88,28 @@ static inline int is_omap ##class (void) \ return (GET_OMAP_CLASS == (id)) ? 1 : 0; \ } +#define GET_OMAP_SUBCLASS ((system_rev >> 16) & 0x0fff) + +#define IS_OMAP_SUBCLASS(subclass, id) \ +static inline int is_omap ##subclass (void) \ +{ \ + return (GET_OMAP_SUBCLASS == (id)) ? 1 : 0; \ +} + IS_OMAP_CLASS(7xx, 0x07) IS_OMAP_CLASS(15xx, 0x15) IS_OMAP_CLASS(16xx, 0x16) IS_OMAP_CLASS(24xx, 0x24) +IS_OMAP_SUBCLASS(242x, 0x242) +IS_OMAP_SUBCLASS(243x, 0x243) + #define cpu_is_omap7xx() 0 #define cpu_is_omap15xx() 0 #define cpu_is_omap16xx() 0 #define cpu_is_omap24xx() 0 +#define cpu_is_omap242x() 0 +#define cpu_is_omap243x() 0 #if defined(MULTI_OMAP1) # if defined(CONFIG_ARCH_OMAP730) @@ -129,7 +139,11 @@ IS_OMAP_CLASS(24xx, 0x24) # endif # if defined(CONFIG_ARCH_OMAP24XX) # undef cpu_is_omap24xx +# undef cpu_is_omap242x +# undef cpu_is_omap243x # define cpu_is_omap24xx() 1 +# define cpu_is_omap242x() is_omap242x() +# define cpu_is_omap243x() is_omap243x() # endif #endif @@ -145,6 +159,9 @@ IS_OMAP_CLASS(24xx, 0x24) * cpu_is_omap1621(): True for OMAP1621 * cpu_is_omap1710(): True for OMAP1710 * cpu_is_omap2420(): True for OMAP2420 + * cpu_is_omap2422(): True for OMAP2422 + * cpu_is_omap2423(): True for OMAP2423 + * cpu_is_omap2430(): True for OMAP2430 */ #define GET_OMAP_TYPE ((system_rev >> 16) & 0xffff) @@ -163,6 +180,9 @@ IS_OMAP_TYPE(5912, 0x1611) IS_OMAP_TYPE(1621, 0x1621) IS_OMAP_TYPE(1710, 0x1710) IS_OMAP_TYPE(2420, 0x2420) +IS_OMAP_TYPE(2422, 0x2422) +IS_OMAP_TYPE(2423, 0x2423) +IS_OMAP_TYPE(2430, 0x2430) #define cpu_is_omap310() 0 #define cpu_is_omap730() 0 @@ -173,6 +193,9 @@ IS_OMAP_TYPE(2420, 0x2420) #define cpu_is_omap1621() 0 #define cpu_is_omap1710() 0 #define cpu_is_omap2420() 0 +#define cpu_is_omap2422() 0 +#define cpu_is_omap2423() 0 +#define cpu_is_omap2430() 0 #if defined(MULTI_OMAP1) # if defined(CONFIG_ARCH_OMAP730) @@ -210,9 +233,15 @@ IS_OMAP_TYPE(2420, 0x2420) # define cpu_is_omap1710() is_omap1710() #endif -#if defined(CONFIG_ARCH_OMAP2420) -# undef cpu_is_omap2420 -# define cpu_is_omap2420() 1 +#if defined(CONFIG_ARCH_OMAP24XX) +# undef cpu_is_omap2420 +# undef cpu_is_omap2422 +# undef cpu_is_omap2423 +# undef cpu_is_omap2430 +# define cpu_is_omap2420() is_omap2420() +# define cpu_is_omap2422() is_omap2422() +# define cpu_is_omap2423() is_omap2423() +# define cpu_is_omap2430() is_omap2430() #endif /* Macros to detect if we have OMAP1 or OMAP2 */