LXR uboot/post/board/lwmon5/dspic.c

   1/*
   2 * (C) Copyright 2008 Dmitry Rakhchev, EmCraft Systems, rda@emcraft.com
   3 *
   4 * Developed for DENX Software Engineering GmbH
   5 *
   6 * See file CREDITS for list of people who contributed to this
   7 * project.
   8 *
   9 * This program is free software; you can redistribute it and/or
  10 * modify it under the terms of the GNU General Public License as
  11 * published by the Free Software Foundation; either version 2 of
  12 * the License, or (at your option) any later version.
  13 *
  14 * This program is distributed in the hope that it will be useful,
  15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 * GNU General Public License for more details.
  18 *
  19 * You should have received a copy of the GNU General Public License
  20 * along with this program; if not, write to the Free Software
  21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22 * MA 02111-1307 USA
  23 */
  24
  25#include <common.h>
  26
  27/* There are two tests for dsPIC currently implemented:
  28 * 1. dsPIC ready test. Done in board_early_init_f(). Only result verified here.
  29 * 2. dsPIC POST result test.  This test gets dsPIC POST codes and version.
  30 */
  31
  32#include <post.h>
  33
  34#include <i2c.h>
  35#include <asm/io.h>
  36
  37DECLARE_GLOBAL_DATA_PTR;
  38
  39#define DSPIC_POST_ERROR_REG    0x800
  40#define DSPIC_SYS_ERROR_REG     0x802
  41#define DSPIC_VERSION_REG       0x804
  42
  43#if CONFIG_POST & CONFIG_SYS_POST_BSPEC1
  44
  45/* Verify that dsPIC ready test done early at hw init passed ok */
  46int dspic_init_post_test(int flags)
  47{
  48        if (in_be32((void *)CONFIG_SYS_DSPIC_TEST_ADDR) & CONFIG_SYS_DSPIC_TEST_MASK) {
  49                post_log("dsPIC init test failed\n");
  50                return 1;
  51        }
  52
  53        return 0;
  54}
  55
  56#endif /* CONFIG_POST & CONFIG_SYS_POST_BSPEC1 */
  57
  58#if CONFIG_POST & CONFIG_SYS_POST_BSPEC2
  59/* Read a register from the dsPIC. */
  60int dspic_read(ushort reg)
  61{
  62        uchar buf[2];
  63
  64        if (i2c_read(CONFIG_SYS_I2C_DSPIC_IO_ADDR, reg, 2, buf, 2))
  65                return -1;
  66
  67        return (uint)((buf[0] << 8) | buf[1]);
  68}
  69
  70/* Verify error codes regs, display version */
  71int dspic_post_test(int flags)
  72{
  73        int data;
  74        int ret = 0;
  75
  76        post_log("\n");
  77        data = dspic_read(DSPIC_VERSION_REG);
  78        if (data == -1) {
  79                post_log("dsPIC : failed read version\n");
  80                ret = 1;
  81        } else {
  82                post_log("dsPIC version: %u.%u\n",
  83                        (data >> 8) & 0xFF, data & 0xFF);
  84        }
  85
  86        data = dspic_read(DSPIC_POST_ERROR_REG);
  87        if (data != 0) ret = 1;
  88        if (data == -1) {
  89                post_log("dsPIC : failed read POST code\n");
  90        } else {
  91                post_log("dsPIC POST code 0x%04X\n", data);
  92        }
  93
  94        data = dspic_read(DSPIC_SYS_ERROR_REG);
  95        if (data == -1) {
  96                post_log("dsPIC : failed read system error\n");
  97                ret = 1;
  98        } else {
  99                post_log("dsPIC SYS-ERROR code: 0x%04X\n", data);
 100        }
 101
 102        return ret;
 103}
 104
 105#endif /* CONFIG_POST & CONFIG_SYS_POST_BSPEC2 */
 106