board/gdsys/mpc8308/mpc8308.c

   1 /*
   2  * (C) Copyright 2014
   3  * Dirk Eibach,  Guntermann & Drunck GmbH, eibach@gdsys.de
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <command.h>
  10 #include <asm/processor.h>
  11 #include <asm/io.h>
  12 #include <asm/ppc4xx-gpio.h>
  13 #include <asm/global_data.h>
  14
  15 #include "mpc8308.h"
  16 #include <gdsys_fpga.h>
  17
  18 #define REFLECTION_TESTPATTERN 0xdede
  19 #define REFLECTION_TESTPATTERN_INV (~REFLECTION_TESTPATTERN & 0xffff)
  20
  21 #ifdef CONFIG_SYS_FPGA_NO_RFL_HI
  22 #define REFLECTION_TESTREG reflection_low
  23 #else
  24 #define REFLECTION_TESTREG reflection_high
  25 #endif
  26
  27 DECLARE_GLOBAL_DATA_PTR;
  28
  29 int get_fpga_state(unsigned dev)
  30 {
  31         return gd->arch.fpga_state[dev];
  32 }
  33
  34 int board_early_init_f(void)
  35 {
  36         unsigned k;
  37
  38         for (k = 0; k < CONFIG_SYS_FPGA_COUNT; ++k)
  39                 gd->arch.fpga_state[k] = 0;
  40
  41         return 0;
  42 }
  43
  44 int board_early_init_r(void)
  45 {
  46         unsigned k;
  47         unsigned ctr;
  48
  49         for (k = 0; k < CONFIG_SYS_FPGA_COUNT; ++k)
  50                 gd->arch.fpga_state[k] = 0;
  51
  52         /*
  53          * reset FPGA
  54          */
  55         mpc8308_init();
  56
  57         mpc8308_set_fpga_reset(1);
  58
  59         mpc8308_setup_hw();
  60
  61         for (k = 0; k < CONFIG_SYS_FPGA_COUNT; ++k) {
  62                 ctr = 0;
  63                 while (!mpc8308_get_fpga_done(k)) {
  64                         udelay(100000);
  65                         if (ctr++ > 5) {
  66                                 gd->arch.fpga_state[k] |=
  67                                         FPGA_STATE_DONE_FAILED;
  68                                 break;
  69                         }
  70                 }
  71         }
  72
  73         udelay(10);
  74
  75         mpc8308_set_fpga_reset(0);
  76
  77         for (k = 0; k < CONFIG_SYS_FPGA_COUNT; ++k) {
  78                 /*
  79                  * wait for fpga out of reset
  80                  */
  81                 ctr = 0;
  82                 while (1) {
  83                         u16 val;
  84
  85                         FPGA_SET_REG(k, reflection_low, REFLECTION_TESTPATTERN);
  86
  87                         FPGA_GET_REG(k, REFLECTION_TESTREG, &val);
  88                         if (val == REFLECTION_TESTPATTERN_INV)
  89                                 break;
  90
  91                         udelay(100000);
  92                         if (ctr++ > 5) {
  93                                 gd->arch.fpga_state[k] |=
  94                                         FPGA_STATE_REFLECTION_FAILED;
  95                                 break;
  96                         }
  97                 }
  98         }
  99
 100         return 0;
 101 }