/* * linux/arch/arm/mach-omap1/id.c * * OMAP1 CPU identification code * * Copyright (C) 2004 Nokia Corporation * Written by Tony Lindgren <tony@atomide.com> * * 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 <linux/config.h> #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> #include <asm/io.h> #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 */ u32 omap_id; /* OMAP revision */ u32 type; /* Cpu id bits [31:08], cpu class bits [07:00] */ }; /* Register values to detect the OMAP version */ static struct omap_id omap_ids[] __initdata = { { .jtag_id = 0xb574, .die_rev = 0x2, .omap_id = 0x03310315, .type = 0x03100000}, { .jtag_id = 0x355f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300100}, { .jtag_id = 0xb55f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300300}, { .jtag_id = 0xb470, .die_rev = 0x0, .omap_id = 0x03310100, .type = 0x15100000}, { .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x16100000}, { .jtag_id = 0xb576, .die_rev = 0x2, .omap_id = 0x03320100, .type = 0x16110000}, { .jtag_id = 0xb576, .die_rev = 0x3, .omap_id = 0x03320100, .type = 0x16100c00}, { .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320200, .type = 0x16100d00}, { .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00}, { .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00}, { .jtag_id = 0xb576, .die_rev = 0x1, .omap_id = 0x03320100, .type = 0x16110000}, { .jtag_id = 0xb58c, .die_rev = 0x2, .omap_id = 0x03320200, .type = 0x16110b00}, { .jtag_id = 0xb58c, .die_rev = 0x3, .omap_id = 0x03320200, .type = 0x16110c00}, { .jtag_id = 0xb65f, .die_rev = 0x0, .omap_id = 0x03320400, .type = 0x16212300}, { .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320400, .type = 0x16212300}, { .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x16212300}, { .jtag_id = 0xb5f7, .die_rev = 0x0, .omap_id = 0x03330000, .type = 0x17100000}, { .jtag_id = 0xb5f7, .die_rev = 0x1, .omap_id = 0x03330100, .type = 0x17100000}, { .jtag_id = 0xb5f7, .die_rev = 0x2, .omap_id = 0x03330100, .type = 0x17100000}, }; /* * Get OMAP type from PROD_ID. * 1710 has the PROD_ID in bits 15:00, not in 16:01 as documented in TRM. * 1510 PROD_ID is empty, and 1610 PROD_ID does not make sense. * Undocumented register in TEST BLOCK is used as fallback; This seems to * work on 1510, 1610 & 1710. The official way hopefully will work in future * processors. */ static u16 __init omap_get_jtag_id(void) { u32 prod_id, omap_id; prod_id = omap_readl(OMAP_PRODUCTION_ID_1); omap_id = omap_readl(OMAP32_ID_1); /* Check for unusable OMAP_PRODUCTION_ID_1 on 1611B/5912 and 730 */ if (((prod_id >> 20) == 0) || (prod_id == omap_id)) prod_id = 0; else prod_id &= 0xffff; if (prod_id) return prod_id; /* Use OMAP32_ID_1 as fallback */ prod_id = ((omap_id >> 12) & 0xffff); return prod_id; } /* * Get OMAP revision from DIE_REV. * Early 1710 processors may have broken OMAP_DIE_ID, it contains PROD_ID. * Undocumented register in the TEST BLOCK is used as fallback. * REVISIT: This does not seem to work on 1510 */ static u8 __init omap_get_die_rev(void) { u32 die_rev; die_rev = omap_readl(OMAP_DIE_ID_1); /* Check for broken OMAP_DIE_ID on early 1710 */ if (((die_rev >> 12) & 0xffff) == omap_get_jtag_id()) die_rev = 0; die_rev = (die_rev >> 17) & 0xf; if (die_rev) return die_rev; die_rev = (omap_readl(OMAP32_ID_1) >> 28) & 0xf; return die_rev; } void __init omap_check_revision(void) { int i; u16 jtag_id; u8 die_rev; u32 omap_id; u8 cpu_type; jtag_id = omap_get_jtag_id(); die_rev = omap_get_die_rev(); omap_id = omap_readl(OMAP32_ID_0); #ifdef DEBUG printk("OMAP_DIE_ID_0: 0x%08x\n", omap_readl(OMAP_DIE_ID_0)); printk("OMAP_DIE_ID_1: 0x%08x DIE_REV: %i\n", omap_readl(OMAP_DIE_ID_1), (omap_readl(OMAP_DIE_ID_1) >> 17) & 0xf); printk("OMAP_PRODUCTION_ID_0: 0x%08x\n", omap_readl(OMAP_PRODUCTION_ID_0)); printk("OMAP_PRODUCTION_ID_1: 0x%08x JTAG_ID: 0x%04x\n", omap_readl(OMAP_PRODUCTION_ID_1), omap_readl(OMAP_PRODUCTION_ID_1) & 0xffff); printk("OMAP32_ID_0: 0x%08x\n", omap_readl(OMAP32_ID_0)); printk("OMAP32_ID_1: 0x%08x\n", omap_readl(OMAP32_ID_1)); printk("JTAG_ID: 0x%04x DIE_REV: %i\n", jtag_id, die_rev); #endif system_serial_high = omap_readl(OMAP_DIE_ID_0); system_serial_low = omap_readl(OMAP_DIE_ID_1); /* First check only the major version in a safe way */ for (i = 0; i < ARRAY_SIZE(omap_ids); i++) { if (jtag_id == (omap_ids[i].jtag_id)) { system_rev = omap_ids[i].type; break; } } /* Check if we can find the die revision */ for (i = 0; i < ARRAY_SIZE(omap_ids); i++) { if (jtag_id == omap_ids[i].jtag_id && die_rev == omap_ids[i].die_rev) { system_rev = omap_ids[i].type; break; } } /* Finally check also the omap_id */ for (i = 0; i < ARRAY_SIZE(omap_ids); i++) { if (jtag_id == omap_ids[i].jtag_id && die_rev == omap_ids[i].die_rev && omap_id == omap_ids[i].omap_id) { system_rev = omap_ids[i].type; break; } } /* Add the cpu class info (7xx, 15xx, 16xx, 24xx) */ cpu_type = system_rev >> 24; switch (cpu_type) { case 0x07: system_rev |= 0x07; break; case 0x03: case 0x15: system_rev |= 0x15; break; case 0x16: case 0x17: system_rev |= 0x16; break; case 0x24: system_rev |= 0x24; break; default: printk("Unknown OMAP cpu type: 0x%02x\n", cpu_type); } printk("OMAP%04x", system_rev >> 16); if ((system_rev >> 8) & 0xff) printk("%x", (system_rev >> 8) & 0xff); printk(" revision %i handled as %02xxx id: %08x%08x\n", die_rev, system_rev & 0xff, system_serial_low, system_serial_high); }