board/freescale/c29xpcie/cpld.c

   1 /**
   2  * Copyright 2013 Freescale Semiconductor
   3  * Author: Mingkai Hu <Mingkai.hu@freescale.com>
   4  *         Po Liu <Po.Liu@freescale.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the Free
   8  * Software Foundation; either version 2 of the License, or (at your option)
   9  * any later version.
  10  *
  11  * This file provides support for the board-specific CPLD used on some Freescale
  12  * reference boards.
  13  *
  14  * The following macros need to be defined:
  15  *
  16  * CONFIG_SYS_CPLD_BASE - The virtual address of the base of the
  17  * CPLD register map
  18  *
  19  */
  20
  21 #include <common.h>
  22 #include <command.h>
  23 #include <asm/io.h>
  24
  25 #include "cpld.h"
  26 /**
  27  * Set the boot bank to the alternate bank
  28  */
  29 void cpld_set_altbank(u8 banksel)
  30 {
  31         struct cpld_data *cpld_data = (void *)(CONFIG_SYS_CPLD_BASE);
  32         u8 reg11;
  33
  34         reg11 = in_8(&cpld_data->flhcsr);
  35
  36         switch (banksel) {
  37         case 1:
  38                 out_8(&cpld_data->flhcsr, (reg11 & CPLD_BANKSEL_MASK)
  39                         | CPLD_BANKSEL_EN | CPLD_SELECT_BANK1);
  40                 break;
  41         case 2:
  42                 out_8(&cpld_data->flhcsr, (reg11 & CPLD_BANKSEL_MASK)
  43                         | CPLD_BANKSEL_EN | CPLD_SELECT_BANK2);
  44                 break;
  45         case 3:
  46                 out_8(&cpld_data->flhcsr, (reg11 & CPLD_BANKSEL_MASK)
  47                         | CPLD_BANKSEL_EN | CPLD_SELECT_BANK3);
  48                 break;
  49         case 4:
  50                 out_8(&cpld_data->flhcsr, (reg11 & CPLD_BANKSEL_MASK)
  51                         | CPLD_BANKSEL_EN | CPLD_SELECT_BANK4);
  52                 break;
  53         default:
  54                 printf("Invalid value! [1-4]\n");
  55                 return;
  56         }
  57
  58         udelay(100);
  59         do_reset(NULL, 0, 0, NULL);
  60 }
  61
  62 /**
  63  * Set the boot bank to the default bank
  64  */
  65 void cpld_set_defbank(void)
  66 {
  67         cpld_set_altbank(4);
  68 }
  69
  70 #ifdef DEBUG
  71 static void cpld_dump_regs(void)
  72 {
  73         struct cpld_data *cpld_data = (void *)(CONFIG_SYS_CPLD_BASE);
  74
  75         printf("chipid1         = 0x%02x\n", in_8(&cpld_data->chipid1));
  76         printf("chipid2         = 0x%02x\n", in_8(&cpld_data->chipid2));
  77         printf("hwver           = 0x%02x\n", in_8(&cpld_data->hwver));
  78         printf("cpldver         = 0x%02x\n", in_8(&cpld_data->cpldver));
  79         printf("rstcon          = 0x%02x\n", in_8(&cpld_data->rstcon));
  80         printf("flhcsr          = 0x%02x\n", in_8(&cpld_data->flhcsr));
  81         printf("wdcsr           = 0x%02x\n", in_8(&cpld_data->wdcsr));
  82         printf("wdkick          = 0x%02x\n", in_8(&cpld_data->wdkick));
  83         printf("fancsr          = 0x%02x\n", in_8(&cpld_data->fancsr));
  84         printf("ledcsr          = 0x%02x\n", in_8(&cpld_data->ledcsr));
  85         printf("misc            = 0x%02x\n", in_8(&cpld_data->misccsr));
  86         printf("bootor          = 0x%02x\n", in_8(&cpld_data->bootor));
  87         printf("bootcfg1        = 0x%02x\n", in_8(&cpld_data->bootcfg1));
  88         printf("bootcfg2        = 0x%02x\n", in_8(&cpld_data->bootcfg2));
  89         printf("bootcfg3        = 0x%02x\n", in_8(&cpld_data->bootcfg3));
  90         printf("bootcfg4        = 0x%02x\n", in_8(&cpld_data->bootcfg4));
  91         putc('\n');
  92 }
  93 #endif
  94
  95 int cpld_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
  96 {
  97         int rc = 0;
  98         unsigned char value;
  99
 100         if (argc <= 1)
 101                 return cmd_usage(cmdtp);
 102
 103         if (strcmp(argv[1], "reset") == 0) {
 104                 if (!strcmp(argv[2], "altbank") && argv[3]) {
 105                         value = (u8)simple_strtoul(argv[3], NULL, 16);
 106                         cpld_set_altbank(value);
 107                 } else if (!argv[2])
 108                         cpld_set_defbank();
 109                 else
 110                         cmd_usage(cmdtp);
 111 #ifdef DEBUG
 112         } else if (strcmp(argv[1], "dump") == 0) {
 113                 cpld_dump_regs();
 114 #endif
 115         } else
 116                 rc = cmd_usage(cmdtp);
 117
 118         return rc;
 119 }
 120
 121 U_BOOT_CMD(
 122         cpld_cmd, CONFIG_SYS_MAXARGS, 1, cpld_cmd,
 123         "Reset the board using the CPLD sequencer",
 124         "reset - hard reset to default bank 4\n"
 125         "cpld_cmd reset altbank [bank]- reset to alternate bank\n"
 126         "       - [bank] bank value select 1-4\n"
 127         "       - bank 1 on the flash 0x0000000~0x0ffffff\n"
 128         "       - bank 2 on the flash 0x1000000~0x1ffffff\n"
 129         "       - bank 3 on the flash 0x2000000~0x2ffffff\n"
 130         "       - bank 4 on the flash 0x3000000~0x3ffffff\n"
 131 #ifdef DEBUG
 132         "cpld_cmd dump - display the CPLD registers\n"
 133 #endif
 134         );