Tony Lindgren | f577ffd | 2005-07-10 19:58:12 +0100 | [diff] [blame] | 1 | /* |
| 2 | * linux/arch/arm/mach-omap1/id.c |
| 3 | * |
| 4 | * OMAP1 CPU identification code |
| 5 | * |
| 6 | * Copyright (C) 2004 Nokia Corporation |
| 7 | * Written by Tony Lindgren <tony@atomide.com> |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License version 2 as |
| 11 | * published by the Free Software Foundation. |
| 12 | */ |
| 13 | |
Tony Lindgren | f577ffd | 2005-07-10 19:58:12 +0100 | [diff] [blame] | 14 | #include <linux/module.h> |
| 15 | #include <linux/kernel.h> |
| 16 | #include <linux/init.h> |
Russell King | fced80c | 2008-09-06 12:10:45 +0100 | [diff] [blame] | 17 | #include <linux/io.h> |
David Howells | 9f97da7 | 2012-03-28 18:30:01 +0100 | [diff] [blame] | 18 | #include <asm/system_info.h> |
Tony Lindgren | 2e3ee9f | 2012-02-24 10:34:34 -0800 | [diff] [blame] | 19 | |
Tony Lindgren | ce491cf | 2009-10-20 09:40:47 -0700 | [diff] [blame] | 20 | #include <plat/cpu.h> |
Tony Lindgren | f577ffd | 2005-07-10 19:58:12 +0100 | [diff] [blame] | 21 | |
Tony Lindgren | 2c799ce | 2012-02-24 10:34:35 -0800 | [diff] [blame] | 22 | #include <mach/hardware.h> |
| 23 | |
Tony Lindgren | 3179a01 | 2005-11-10 14:26:48 +0000 | [diff] [blame] | 24 | #define OMAP_DIE_ID_0 0xfffe1800 |
| 25 | #define OMAP_DIE_ID_1 0xfffe1804 |
| 26 | #define OMAP_PRODUCTION_ID_0 0xfffe2000 |
| 27 | #define OMAP_PRODUCTION_ID_1 0xfffe2004 |
| 28 | #define OMAP32_ID_0 0xfffed400 |
| 29 | #define OMAP32_ID_1 0xfffed404 |
| 30 | |
Tony Lindgren | f577ffd | 2005-07-10 19:58:12 +0100 | [diff] [blame] | 31 | struct omap_id { |
| 32 | u16 jtag_id; /* Used to determine OMAP type */ |
| 33 | u8 die_rev; /* Processor revision */ |
| 34 | u32 omap_id; /* OMAP revision */ |
| 35 | u32 type; /* Cpu id bits [31:08], cpu class bits [07:00] */ |
| 36 | }; |
| 37 | |
Lauri Leukkunen | 84a3434 | 2008-12-10 17:36:31 -0800 | [diff] [blame] | 38 | static unsigned int omap_revision; |
| 39 | |
Tony Lindgren | f577ffd | 2005-07-10 19:58:12 +0100 | [diff] [blame] | 40 | /* Register values to detect the OMAP version */ |
| 41 | static struct omap_id omap_ids[] __initdata = { |
Tony Lindgren | 3179a01 | 2005-11-10 14:26:48 +0000 | [diff] [blame] | 42 | { .jtag_id = 0xb574, .die_rev = 0x2, .omap_id = 0x03310315, .type = 0x03100000}, |
Tony Lindgren | f577ffd | 2005-07-10 19:58:12 +0100 | [diff] [blame] | 43 | { .jtag_id = 0x355f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300100}, |
| 44 | { .jtag_id = 0xb55f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300300}, |
Angelo Arrifano | f5ee2fc | 2009-09-24 16:23:13 -0700 | [diff] [blame] | 45 | { .jtag_id = 0xb62c, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x08500000}, |
Tony Lindgren | f577ffd | 2005-07-10 19:58:12 +0100 | [diff] [blame] | 46 | { .jtag_id = 0xb470, .die_rev = 0x0, .omap_id = 0x03310100, .type = 0x15100000}, |
| 47 | { .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x16100000}, |
| 48 | { .jtag_id = 0xb576, .die_rev = 0x2, .omap_id = 0x03320100, .type = 0x16110000}, |
| 49 | { .jtag_id = 0xb576, .die_rev = 0x3, .omap_id = 0x03320100, .type = 0x16100c00}, |
| 50 | { .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320200, .type = 0x16100d00}, |
| 51 | { .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00}, |
| 52 | { .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00}, |
| 53 | { .jtag_id = 0xb576, .die_rev = 0x1, .omap_id = 0x03320100, .type = 0x16110000}, |
| 54 | { .jtag_id = 0xb58c, .die_rev = 0x2, .omap_id = 0x03320200, .type = 0x16110b00}, |
| 55 | { .jtag_id = 0xb58c, .die_rev = 0x3, .omap_id = 0x03320200, .type = 0x16110c00}, |
| 56 | { .jtag_id = 0xb65f, .die_rev = 0x0, .omap_id = 0x03320400, .type = 0x16212300}, |
| 57 | { .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320400, .type = 0x16212300}, |
| 58 | { .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x16212300}, |
| 59 | { .jtag_id = 0xb5f7, .die_rev = 0x0, .omap_id = 0x03330000, .type = 0x17100000}, |
| 60 | { .jtag_id = 0xb5f7, .die_rev = 0x1, .omap_id = 0x03330100, .type = 0x17100000}, |
| 61 | { .jtag_id = 0xb5f7, .die_rev = 0x2, .omap_id = 0x03330100, .type = 0x17100000}, |
| 62 | }; |
| 63 | |
Lauri Leukkunen | 84a3434 | 2008-12-10 17:36:31 -0800 | [diff] [blame] | 64 | unsigned int omap_rev(void) |
| 65 | { |
| 66 | return omap_revision; |
| 67 | } |
| 68 | EXPORT_SYMBOL(omap_rev); |
| 69 | |
Tony Lindgren | f577ffd | 2005-07-10 19:58:12 +0100 | [diff] [blame] | 70 | /* |
| 71 | * Get OMAP type from PROD_ID. |
| 72 | * 1710 has the PROD_ID in bits 15:00, not in 16:01 as documented in TRM. |
| 73 | * 1510 PROD_ID is empty, and 1610 PROD_ID does not make sense. |
| 74 | * Undocumented register in TEST BLOCK is used as fallback; This seems to |
| 75 | * work on 1510, 1610 & 1710. The official way hopefully will work in future |
| 76 | * processors. |
| 77 | */ |
| 78 | static u16 __init omap_get_jtag_id(void) |
| 79 | { |
| 80 | u32 prod_id, omap_id; |
| 81 | |
| 82 | prod_id = omap_readl(OMAP_PRODUCTION_ID_1); |
| 83 | omap_id = omap_readl(OMAP32_ID_1); |
| 84 | |
Zebediah C. McClure | ae302f4 | 2009-03-23 18:07:39 -0700 | [diff] [blame] | 85 | /* Check for unusable OMAP_PRODUCTION_ID_1 on 1611B/5912 and 730/850 */ |
Tony Lindgren | f577ffd | 2005-07-10 19:58:12 +0100 | [diff] [blame] | 86 | if (((prod_id >> 20) == 0) || (prod_id == omap_id)) |
| 87 | prod_id = 0; |
| 88 | else |
| 89 | prod_id &= 0xffff; |
| 90 | |
| 91 | if (prod_id) |
| 92 | return prod_id; |
| 93 | |
| 94 | /* Use OMAP32_ID_1 as fallback */ |
| 95 | prod_id = ((omap_id >> 12) & 0xffff); |
| 96 | |
| 97 | return prod_id; |
| 98 | } |
| 99 | |
| 100 | /* |
| 101 | * Get OMAP revision from DIE_REV. |
| 102 | * Early 1710 processors may have broken OMAP_DIE_ID, it contains PROD_ID. |
| 103 | * Undocumented register in the TEST BLOCK is used as fallback. |
| 104 | * REVISIT: This does not seem to work on 1510 |
| 105 | */ |
| 106 | static u8 __init omap_get_die_rev(void) |
| 107 | { |
| 108 | u32 die_rev; |
| 109 | |
| 110 | die_rev = omap_readl(OMAP_DIE_ID_1); |
| 111 | |
| 112 | /* Check for broken OMAP_DIE_ID on early 1710 */ |
| 113 | if (((die_rev >> 12) & 0xffff) == omap_get_jtag_id()) |
| 114 | die_rev = 0; |
| 115 | |
| 116 | die_rev = (die_rev >> 17) & 0xf; |
| 117 | if (die_rev) |
| 118 | return die_rev; |
| 119 | |
| 120 | die_rev = (omap_readl(OMAP32_ID_1) >> 28) & 0xf; |
| 121 | |
| 122 | return die_rev; |
| 123 | } |
| 124 | |
| 125 | void __init omap_check_revision(void) |
| 126 | { |
| 127 | int i; |
| 128 | u16 jtag_id; |
| 129 | u8 die_rev; |
| 130 | u32 omap_id; |
| 131 | u8 cpu_type; |
| 132 | |
| 133 | jtag_id = omap_get_jtag_id(); |
| 134 | die_rev = omap_get_die_rev(); |
| 135 | omap_id = omap_readl(OMAP32_ID_0); |
| 136 | |
| 137 | #ifdef DEBUG |
Lauri Leukkunen | 84a3434 | 2008-12-10 17:36:31 -0800 | [diff] [blame] | 138 | printk(KERN_DEBUG "OMAP_DIE_ID_0: 0x%08x\n", omap_readl(OMAP_DIE_ID_0)); |
| 139 | printk(KERN_DEBUG "OMAP_DIE_ID_1: 0x%08x DIE_REV: %i\n", |
Tony Lindgren | f577ffd | 2005-07-10 19:58:12 +0100 | [diff] [blame] | 140 | omap_readl(OMAP_DIE_ID_1), |
| 141 | (omap_readl(OMAP_DIE_ID_1) >> 17) & 0xf); |
Lauri Leukkunen | 84a3434 | 2008-12-10 17:36:31 -0800 | [diff] [blame] | 142 | printk(KERN_DEBUG "OMAP_PRODUCTION_ID_0: 0x%08x\n", |
| 143 | omap_readl(OMAP_PRODUCTION_ID_0)); |
| 144 | printk(KERN_DEBUG "OMAP_PRODUCTION_ID_1: 0x%08x JTAG_ID: 0x%04x\n", |
Tony Lindgren | f577ffd | 2005-07-10 19:58:12 +0100 | [diff] [blame] | 145 | omap_readl(OMAP_PRODUCTION_ID_1), |
| 146 | omap_readl(OMAP_PRODUCTION_ID_1) & 0xffff); |
Lauri Leukkunen | 84a3434 | 2008-12-10 17:36:31 -0800 | [diff] [blame] | 147 | printk(KERN_DEBUG "OMAP32_ID_0: 0x%08x\n", omap_readl(OMAP32_ID_0)); |
| 148 | printk(KERN_DEBUG "OMAP32_ID_1: 0x%08x\n", omap_readl(OMAP32_ID_1)); |
| 149 | printk(KERN_DEBUG "JTAG_ID: 0x%04x DIE_REV: %i\n", jtag_id, die_rev); |
Tony Lindgren | f577ffd | 2005-07-10 19:58:12 +0100 | [diff] [blame] | 150 | #endif |
| 151 | |
| 152 | system_serial_high = omap_readl(OMAP_DIE_ID_0); |
| 153 | system_serial_low = omap_readl(OMAP_DIE_ID_1); |
| 154 | |
| 155 | /* First check only the major version in a safe way */ |
| 156 | for (i = 0; i < ARRAY_SIZE(omap_ids); i++) { |
| 157 | if (jtag_id == (omap_ids[i].jtag_id)) { |
Lauri Leukkunen | 84a3434 | 2008-12-10 17:36:31 -0800 | [diff] [blame] | 158 | omap_revision = omap_ids[i].type; |
Tony Lindgren | f577ffd | 2005-07-10 19:58:12 +0100 | [diff] [blame] | 159 | break; |
| 160 | } |
| 161 | } |
| 162 | |
| 163 | /* Check if we can find the die revision */ |
| 164 | for (i = 0; i < ARRAY_SIZE(omap_ids); i++) { |
| 165 | if (jtag_id == omap_ids[i].jtag_id && die_rev == omap_ids[i].die_rev) { |
Lauri Leukkunen | 84a3434 | 2008-12-10 17:36:31 -0800 | [diff] [blame] | 166 | omap_revision = omap_ids[i].type; |
Tony Lindgren | f577ffd | 2005-07-10 19:58:12 +0100 | [diff] [blame] | 167 | break; |
| 168 | } |
| 169 | } |
| 170 | |
| 171 | /* Finally check also the omap_id */ |
| 172 | for (i = 0; i < ARRAY_SIZE(omap_ids); i++) { |
| 173 | if (jtag_id == omap_ids[i].jtag_id |
| 174 | && die_rev == omap_ids[i].die_rev |
| 175 | && omap_id == omap_ids[i].omap_id) { |
Lauri Leukkunen | 84a3434 | 2008-12-10 17:36:31 -0800 | [diff] [blame] | 176 | omap_revision = omap_ids[i].type; |
Tony Lindgren | f577ffd | 2005-07-10 19:58:12 +0100 | [diff] [blame] | 177 | break; |
| 178 | } |
| 179 | } |
| 180 | |
| 181 | /* Add the cpu class info (7xx, 15xx, 16xx, 24xx) */ |
Lauri Leukkunen | 84a3434 | 2008-12-10 17:36:31 -0800 | [diff] [blame] | 182 | cpu_type = omap_revision >> 24; |
Tony Lindgren | f577ffd | 2005-07-10 19:58:12 +0100 | [diff] [blame] | 183 | |
| 184 | switch (cpu_type) { |
| 185 | case 0x07: |
Zebediah C. McClure | ae302f4 | 2009-03-23 18:07:39 -0700 | [diff] [blame] | 186 | case 0x08: |
Lauri Leukkunen | 84a3434 | 2008-12-10 17:36:31 -0800 | [diff] [blame] | 187 | omap_revision |= 0x07; |
Tony Lindgren | f577ffd | 2005-07-10 19:58:12 +0100 | [diff] [blame] | 188 | break; |
Tony Lindgren | 3179a01 | 2005-11-10 14:26:48 +0000 | [diff] [blame] | 189 | case 0x03: |
Tony Lindgren | f577ffd | 2005-07-10 19:58:12 +0100 | [diff] [blame] | 190 | case 0x15: |
Lauri Leukkunen | 84a3434 | 2008-12-10 17:36:31 -0800 | [diff] [blame] | 191 | omap_revision |= 0x15; |
Tony Lindgren | f577ffd | 2005-07-10 19:58:12 +0100 | [diff] [blame] | 192 | break; |
| 193 | case 0x16: |
| 194 | case 0x17: |
Lauri Leukkunen | 84a3434 | 2008-12-10 17:36:31 -0800 | [diff] [blame] | 195 | omap_revision |= 0x16; |
Tony Lindgren | f577ffd | 2005-07-10 19:58:12 +0100 | [diff] [blame] | 196 | break; |
Tony Lindgren | f577ffd | 2005-07-10 19:58:12 +0100 | [diff] [blame] | 197 | default: |
Lauri Leukkunen | 84a3434 | 2008-12-10 17:36:31 -0800 | [diff] [blame] | 198 | printk(KERN_INFO "Unknown OMAP cpu type: 0x%02x\n", cpu_type); |
Tony Lindgren | f577ffd | 2005-07-10 19:58:12 +0100 | [diff] [blame] | 199 | } |
| 200 | |
Lauri Leukkunen | 84a3434 | 2008-12-10 17:36:31 -0800 | [diff] [blame] | 201 | printk(KERN_INFO "OMAP%04x", omap_revision >> 16); |
| 202 | if ((omap_revision >> 8) & 0xff) |
| 203 | printk(KERN_INFO "%x", (omap_revision >> 8) & 0xff); |
| 204 | printk(KERN_INFO " revision %i handled as %02xxx id: %08x%08x\n", |
| 205 | die_rev, omap_revision & 0xff, system_serial_low, |
Tony Lindgren | f577ffd | 2005-07-10 19:58:12 +0100 | [diff] [blame] | 206 | system_serial_high); |
| 207 | } |
| 208 | |