LXR uboot/cpu/arm926ejs/omap/cpuinfo.c

   1/*
   2 * OMAP1 CPU identification code
   3 *
   4 * Copyright (C) 2004 Nokia Corporation
   5 * Written by Tony Lindgren <tony@atomide.com>
   6 *
   7 * This program is free software; you can redistribute it and/or modify
   8 * it under the terms of the GNU General Public License version 2 as
   9 * published by the Free Software Foundation.
  10 */
  11
  12#include <common.h>
  13#include <command.h>
  14#include <arm926ejs.h>
  15
  16#if defined(CONFIG_DISPLAY_CPUINFO) && defined(CONFIG_OMAP)
  17
  18#define omap_readw(x)           *(volatile unsigned short *)(x)
  19#define omap_readl(x)           *(volatile unsigned long *)(x)
  20
  21#define OMAP_DIE_ID_0           0xfffe1800
  22#define OMAP_DIE_ID_1           0xfffe1804
  23#define OMAP_PRODUCTION_ID_0    0xfffe2000
  24#define OMAP_PRODUCTION_ID_1    0xfffe2004
  25#define OMAP32_ID_0             0xfffed400
  26#define OMAP32_ID_1             0xfffed404
  27
  28struct omap_id {
  29        u16     jtag_id;        /* Used to determine OMAP type */
  30        u8      die_rev;        /* Processor revision */
  31        u32     omap_id;        /* OMAP revision */
  32        u32     type;           /* Cpu id bits [31:08], cpu class bits [07:00] */
  33};
  34
  35/* Register values to detect the OMAP version */
  36static struct omap_id omap_ids[] = {
  37        { .jtag_id = 0xb574, .die_rev = 0x2, .omap_id = 0x03310315, .type = 0x03100000},
  38        { .jtag_id = 0x355f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300100},
  39        { .jtag_id = 0xb55f, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x07300300},
  40        { .jtag_id = 0xb470, .die_rev = 0x0, .omap_id = 0x03310100, .type = 0x15100000},
  41        { .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320000, .type = 0x16100000},
  42        { .jtag_id = 0xb576, .die_rev = 0x2, .omap_id = 0x03320100, .type = 0x16110000},
  43        { .jtag_id = 0xb576, .die_rev = 0x3, .omap_id = 0x03320100, .type = 0x16100c00},
  44        { .jtag_id = 0xb576, .die_rev = 0x0, .omap_id = 0x03320200, .type = 0x16100d00},
  45        { .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
  46        { .jtag_id = 0xb613, .die_rev = 0x0, .omap_id = 0x03320300, .type = 0x1610ef00},
  47        { .jtag_id = 0xb576, .die_rev = 0x1, .omap_id = 0x03320100, .type = 0x16110000},
  48        { .jtag_id = 0xb58c, .die_rev = 0x2, .omap_id = 0x03320200, .type = 0x16110b00},
  49        { .jtag_id = 0xb58c, .die_rev = 0x3, .omap_id = 0x03320200, .type = 0x16110c00},
  50        { .jtag_id = 0xb65f, .die_rev = 0x0, .omap_id = 0x03320400, .type = 0x16212300},
  51        { .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320400, .type = 0x16212300},
  52        { .jtag_id = 0xb65f, .die_rev = 0x1, .omap_id = 0x03320500, .type = 0x16212300},
  53        { .jtag_id = 0xb5f7, .die_rev = 0x0, .omap_id = 0x03330000, .type = 0x17100000},
  54        { .jtag_id = 0xb5f7, .die_rev = 0x1, .omap_id = 0x03330100, .type = 0x17100000},
  55        { .jtag_id = 0xb5f7, .die_rev = 0x2, .omap_id = 0x03330100, .type = 0x17100000},
  56};
  57
  58/*
  59 * Get OMAP type from PROD_ID.
  60 * 1710 has the PROD_ID in bits 15:00, not in 16:01 as documented in TRM.
  61 * 1510 PROD_ID is empty, and 1610 PROD_ID does not make sense.
  62 * Undocumented register in TEST BLOCK is used as fallback; This seems to
  63 * work on 1510, 1610 & 1710. The official way hopefully will work in future
  64 * processors.
  65 */
  66static u16 omap_get_jtag_id(void)
  67{
  68        u32 prod_id, omap_id;
  69
  70        prod_id = omap_readl(OMAP_PRODUCTION_ID_1);
  71        omap_id = omap_readl(OMAP32_ID_1);
  72
  73        /* Check for unusable OMAP_PRODUCTION_ID_1 on 1611B/5912 and 730 */
  74        if (((prod_id >> 20) == 0) || (prod_id == omap_id))
  75                prod_id = 0;
  76        else
  77                prod_id &= 0xffff;
  78
  79        if (prod_id)
  80                return prod_id;
  81
  82        /* Use OMAP32_ID_1 as fallback */
  83        prod_id = ((omap_id >> 12) & 0xffff);
  84
  85        return prod_id;
  86}
  87
  88/*
  89 * Get OMAP revision from DIE_REV.
  90 * Early 1710 processors may have broken OMAP_DIE_ID, it contains PROD_ID.
  91 * Undocumented register in the TEST BLOCK is used as fallback.
  92 * REVISIT: This does not seem to work on 1510
  93 */
  94static u8 omap_get_die_rev(void)
  95{
  96        u32 die_rev;
  97
  98        die_rev = omap_readl(OMAP_DIE_ID_1);
  99
 100        /* Check for broken OMAP_DIE_ID on early 1710 */
 101        if (((die_rev >> 12) & 0xffff) == omap_get_jtag_id())
 102                die_rev = 0;
 103
 104        die_rev = (die_rev >> 17) & 0xf;
 105        if (die_rev)
 106                return die_rev;
 107
 108        die_rev = (omap_readl(OMAP32_ID_1) >> 28) & 0xf;
 109
 110        return die_rev;
 111}
 112
 113static unsigned long dpll1(void)
 114{
 115        unsigned short pll_ctl_val = omap_readw(DPLL_CTL_REG);
 116        unsigned long rate;
 117
 118        rate = CONFIG_SYS_CLK_FREQ; /* Base xtal rate */
 119        if (pll_ctl_val & 0x10) {
 120                /* PLL enabled, apply multiplier and divisor */
 121                if (pll_ctl_val & 0xf80)
 122                        rate *= (pll_ctl_val & 0xf80) >> 7;
 123                rate /= ((pll_ctl_val & 0x60) >> 5) + 1;
 124        } else {
 125                /* PLL disabled, apply bypass divisor */
 126                switch (pll_ctl_val & 0xc) {
 127                case 0:
 128                        break;
 129                case 0x4:
 130                        rate /= 2;
 131                        break;
 132                default:
 133                        rate /= 4;
 134                        break;
 135                }
 136        }
 137
 138        return rate;
 139}
 140
 141static unsigned long armcore(void)
 142{
 143        unsigned short arm_ckctl = omap_readw(ARM_CKCTL);
 144
 145        return (dpll1() >> ((arm_ckctl & 0x0030) >> 4));
 146}
 147
 148int print_cpuinfo (void)
 149{
 150        int i;
 151        u16 jtag_id;
 152        u8 die_rev;
 153        u32 omap_id;
 154        u8 cpu_type;
 155        u32 system_serial_high;
 156        u32 system_serial_low;
 157        u32 system_rev = 0;
 158
 159        jtag_id = omap_get_jtag_id();
 160        die_rev = omap_get_die_rev();
 161        omap_id = omap_readl(OMAP32_ID_0);
 162
 163#ifdef DEBUG
 164        printf("OMAP_DIE_ID_0: 0x%08x\n", omap_readl(OMAP_DIE_ID_0));
 165        printf("OMAP_DIE_ID_1: 0x%08x DIE_REV: %i\n",
 166               omap_readl(OMAP_DIE_ID_1),
 167               (omap_readl(OMAP_DIE_ID_1) >> 17) & 0xf);
 168        printf("OMAP_PRODUCTION_ID_0: 0x%08x\n", omap_readl(OMAP_PRODUCTION_ID_0));
 169        printf("OMAP_PRODUCTION_ID_1: 0x%08x JTAG_ID: 0x%04x\n",
 170               omap_readl(OMAP_PRODUCTION_ID_1),
 171               omap_readl(OMAP_PRODUCTION_ID_1) & 0xffff);
 172        printf("OMAP32_ID_0: 0x%08x\n", omap_readl(OMAP32_ID_0));
 173        printf("OMAP32_ID_1: 0x%08x\n", omap_readl(OMAP32_ID_1));
 174        printf("JTAG_ID: 0x%04x DIE_REV: %i\n", jtag_id, die_rev);
 175#endif
 176
 177        system_serial_high = omap_readl(OMAP_DIE_ID_0);
 178        system_serial_low = omap_readl(OMAP_DIE_ID_1);
 179
 180        /* First check only the major version in a safe way */
 181        for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
 182                if (jtag_id == (omap_ids[i].jtag_id)) {
 183                        system_rev = omap_ids[i].type;
 184                        break;
 185                }
 186        }
 187
 188        /* Check if we can find the die revision */
 189        for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
 190                if (jtag_id == omap_ids[i].jtag_id && die_rev == omap_ids[i].die_rev) {
 191                        system_rev = omap_ids[i].type;
 192                        break;
 193                }
 194        }
 195
 196        /* Finally check also the omap_id */
 197        for (i = 0; i < ARRAY_SIZE(omap_ids); i++) {
 198                if (jtag_id == omap_ids[i].jtag_id
 199                    && die_rev == omap_ids[i].die_rev
 200                    && omap_id == omap_ids[i].omap_id) {
 201                        system_rev = omap_ids[i].type;
 202                        break;
 203                }
 204        }
 205
 206        /* Add the cpu class info (7xx, 15xx, 16xx, 24xx) */
 207        cpu_type = system_rev >> 24;
 208
 209        switch (cpu_type) {
 210        case 0x07:
 211                system_rev |= 0x07;
 212                break;
 213        case 0x03:
 214        case 0x15:
 215                system_rev |= 0x15;
 216                break;
 217        case 0x16:
 218        case 0x17:
 219                system_rev |= 0x16;
 220                break;
 221        case 0x24:
 222                system_rev |= 0x24;
 223                break;
 224        default:
 225                printf("Unknown OMAP cpu type: 0x%02x\n", cpu_type);
 226        }
 227
 228        printf("CPU:   OMAP%04x", system_rev >> 16);
 229        if ((system_rev >> 8) & 0xff)
 230                printf("%x", (system_rev >> 8) & 0xff);
 231#ifdef DEBUG
 232        printf(" revision %i handled as %02xxx id: %08x%08x",
 233               die_rev, system_rev & 0xff, system_serial_low, system_serial_high);
 234#endif
 235        printf(" at %ld.%01ld MHz (DPLL1=%ld.%01ld MHz)\n",
 236               armcore() / 1000000, (armcore() / 100000) % 10,
 237               dpll1() / 1000000, (dpll1() / 100000) % 10);
 238
 239        return 0;
 240}
 241
 242#endif /* #if defined(CONFIG_DISPLAY_CPUINFO) && defined(CONFIG_OMAP) */
 243