LXR uboot/arch/arm/cpu/armv7/am33xx/sys

   1/*
   2 * sys_info.c
   3 *
   4 * System information functions
   5 *
   6 * Copyright (C) 2011, Texas Instruments, Incorporated - http://www.ti.com/
   7 *
   8 * Derived from Beagle Board and 3430 SDP code by
   9 *      Richard Woodruff <r-woodruff2@ti.com>
  10 *      Syed Mohammed Khasim <khasim@ti.com>
  11 *
  12 * This program is free software; you can redistribute it and/or
  13 * modify it under the terms of the GNU General Public License as
  14 * published by the Free Software Foundation; either version 2 of
  15 * the License, or (at your option) any later version.
  16 *
  17 * This program is distributed in the hope that it will be useful,
  18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR /PURPOSE.  See the
  20 * GNU General Public License for more details.
  21 */
  22
  23#include <common.h>
  24#include <asm/io.h>
  25#include <asm/arch/sys_proto.h>
  26#include <asm/arch/cpu.h>
  27#include <asm/arch/clock.h>
  28
  29struct ctrl_stat *cstat = (struct ctrl_stat *)CTRL_BASE;
  30
  31/**
  32 * get_cpu_rev(void) - extract rev info
  33 */
  34u32 get_cpu_rev(void)
  35{
  36        u32 id;
  37        u32 rev;
  38
  39        id = readl(DEVICE_ID);
  40        rev = (id >> 28) & 0xff;
  41
  42        return rev;
  43}
  44
  45/**
  46 * get_cpu_type(void) - extract cpu info
  47 */
  48u32 get_cpu_type(void)
  49{
  50        u32 id = 0;
  51        u32 partnum;
  52
  53        id = readl(DEVICE_ID);
  54        partnum = (id >> 12) & 0xffff;
  55
  56        return partnum;
  57}
  58
  59/**
  60 * get_board_rev() - setup to pass kernel board revision information
  61 * returns:(bit[0-3] sub version, higher bit[7-4] is higher version)
  62 */
  63u32 get_board_rev(void)
  64{
  65        return BOARD_REV_ID;
  66}
  67
  68/**
  69 * get_device_type(): tell if GP/HS/EMU/TST
  70 */
  71u32 get_device_type(void)
  72{
  73        int mode;
  74        mode = readl(&cstat->statusreg) & (DEVICE_MASK);
  75        return mode >>= 8;
  76}
  77
  78/**
  79 * get_sysboot_value(void) - return SYS_BOOT[4:0]
  80 */
  81u32 get_sysboot_value(void)
  82{
  83        int mode;
  84        mode = readl(&cstat->statusreg) & (SYSBOOT_MASK);
  85        return mode;
  86}
  87
  88#ifdef CONFIG_DISPLAY_CPUINFO
  89/**
  90 * Print CPU information
  91 */
  92int print_cpuinfo(void)
  93{
  94        char *cpu_s, *sec_s;
  95        int arm_freq, ddr_freq;
  96
  97        switch (get_cpu_type()) {
  98        case AM335X:
  99                cpu_s = "AM335X";
 100                break;
 101        default:
 102                cpu_s = "Unknown cpu type";
 103                break;
 104        }
 105
 106        switch (get_device_type()) {
 107        case TST_DEVICE:
 108                sec_s = "TST";
 109                break;
 110        case EMU_DEVICE:
 111                sec_s = "EMU";
 112                break;
 113        case HS_DEVICE:
 114                sec_s = "HS";
 115                break;
 116        case GP_DEVICE:
 117                sec_s = "GP";
 118                break;
 119        default:
 120                sec_s = "?";
 121        }
 122
 123        printf("AM%s-%s rev %d\n",
 124                        cpu_s, sec_s, get_cpu_rev());
 125
 126        /* TODO: Print ARM and DDR frequencies  */
 127
 128        return 0;
 129}
 130#endif  /* CONFIG_DISPLAY_CPUINFO */
 131