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  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10
  11 /* There are two tests for dsPIC currently implemented:
  12  * 1. dsPIC ready test. Done in board_early_init_f(). Only result verified here.
  13  * 2. dsPIC POST result test.  This test gets dsPIC POST codes and version.
  14  */
  15
  16 #include <post.h>
  17
  18 #include <i2c.h>
  19 #include <asm/io.h>
  20
  21 DECLARE_GLOBAL_DATA_PTR;
  22
  23 #define DSPIC_POST_ERROR_REG    0x800
  24 #define DSPIC_SYS_ERROR_REG     0x802
  25 #define DSPIC_SYS_VERSION_REG   0x804
  26 #define DSPIC_FW_VERSION_REG    0x808
  27
  28 #if CONFIG_POST & CONFIG_SYS_POST_BSPEC1
  29
  30 /* Verify that dsPIC ready test done early at hw init passed ok */
  31 int dspic_init_post_test(int flags)
  32 {
  33         if (in_be32((void *)CONFIG_SYS_DSPIC_TEST_ADDR) &
  34             CONFIG_SYS_DSPIC_TEST_MASK) {
  35                 post_log("dsPIC init test failed\n");
  36                 return 1;
  37         }
  38
  39         return 0;
  40 }
  41
  42 #endif /* CONFIG_POST & CONFIG_SYS_POST_BSPEC1 */
  43
  44 #if CONFIG_POST & CONFIG_SYS_POST_BSPEC2
  45 /* Read a register from the dsPIC. */
  46 int dspic_read(ushort reg, ushort *data)
  47 {
  48         uchar buf[sizeof(*data)];
  49         int rval;
  50
  51         if (i2c_read(CONFIG_SYS_I2C_DSPIC_IO_ADDR, reg, 2, buf, 2))
  52                 return -1;
  53         rval = i2c_read(CONFIG_SYS_I2C_DSPIC_IO_ADDR, reg, sizeof(reg),
  54                         buf, sizeof(*data));
  55         *data = (buf[0] << 8) | buf[1];
  56
  57         return rval;
  58 }
  59
  60 /* Verify error codes regs, display version */
  61 int dspic_post_test(int flags)
  62 {
  63         ushort data;
  64         int ret = 0;
  65
  66         post_log("\n");
  67
  68         /* read dspic FW-Version */
  69         if (dspic_read(DSPIC_FW_VERSION_REG, &data)) {
  70                 post_log("dsPIC: failed read FW-Version\n");
  71                 ret = 1;
  72         } else {
  73                 post_log("dsPIC FW-Version:  %u.%u\n",
  74                          (data >> 8) & 0xFF, data & 0xFF);
  75         }
  76
  77         /* read dspic SYS-Version */
  78         if (dspic_read(DSPIC_SYS_VERSION_REG, &data)) {
  79                 post_log("dsPIC: failed read version\n");
  80                 ret = 1;
  81         } else {
  82                 post_log("dsPIC SYS-Version: %u.%u\n",
  83                          (data >> 8) & 0xFF, data & 0xFF);
  84         }
  85
  86         /* read dspic POST error code */
  87         if (dspic_read(DSPIC_POST_ERROR_REG, &data)) {
  88                 post_log("dsPIC: failed read POST code\n");
  89                 ret = 1;
  90         } else {
  91                 post_log("dsPIC POST-ERROR   code:  0x%04X\n", data);
  92         }
  93
  94         /* read dspic SYS error code */
  95         if ((data = dspic_read(DSPIC_SYS_ERROR_REG, &data))) {
  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 */