board/freescale/t104xrdb/cpld.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /**
   3  * Copyright 2014 Freescale Semiconductor
   4  *
   5  * This file provides support for the board-specific CPLD used on some Freescale
   6  * reference boards.
   7  *
   8  * The following macros need to be defined:
   9  *
  10  * CONFIG_SYS_CPLD_BASE-The virtual address of the base of the CPLD register map
  11  */
  12
  13 #include <common.h>
  14 #include <command.h>
  15 #include <asm/io.h>
  16
  17 #include "cpld.h"
  18
  19 u8 cpld_read(unsigned int reg)
  20 {
  21         void *p = (void *)CONFIG_SYS_CPLD_BASE;
  22
  23         return in_8(p + reg);
  24 }
  25
  26 void cpld_write(unsigned int reg, u8 value)
  27 {
  28         void *p = (void *)CONFIG_SYS_CPLD_BASE;
  29
  30         out_8(p + reg, value);
  31 }
  32
  33 /**
  34  * Set the boot bank to the alternate bank
  35  */
  36 void cpld_set_altbank(void)
  37 {
  38         u8 reg = CPLD_READ(flash_ctl_status);
  39
  40         reg = (reg & ~CPLD_BANK_SEL_MASK) | CPLD_LBMAP_ALTBANK;
  41
  42         CPLD_WRITE(flash_ctl_status, reg);
  43         CPLD_WRITE(reset_ctl1, CPLD_LBMAP_RESET);
  44 }
  45
  46 /**
  47  * Set the boot bank to the default bank
  48  */
  49 void cpld_set_defbank(void)
  50 {
  51         u8 reg = CPLD_READ(flash_ctl_status);
  52
  53         reg = (reg & ~CPLD_BANK_SEL_MASK) | CPLD_LBMAP_DFLTBANK;
  54
  55         CPLD_WRITE(flash_ctl_status, reg);
  56         CPLD_WRITE(reset_ctl1, CPLD_LBMAP_RESET);
  57 }
  58
  59 #ifdef DEBUG
  60 static void cpld_dump_regs(void)
  61 {
  62         printf("cpld_ver         = 0x%02x\n", CPLD_READ(cpld_ver));
  63         printf("cpld_ver_sub     = 0x%02x\n", CPLD_READ(cpld_ver_sub));
  64         printf("hw_ver           = 0x%02x\n", CPLD_READ(hw_ver));
  65         printf("sw_ver           = 0x%02x\n", CPLD_READ(sw_ver));
  66         printf("reset_ctl1       = 0x%02x\n", CPLD_READ(reset_ctl1));
  67         printf("reset_ctl2       = 0x%02x\n", CPLD_READ(reset_ctl2));
  68         printf("int_status       = 0x%02x\n", CPLD_READ(int_status));
  69         printf("flash_ctl_status = 0x%02x\n", CPLD_READ(flash_ctl_status));
  70         printf("fan_ctl_status   = 0x%02x\n", CPLD_READ(fan_ctl_status));
  71 #if defined(CONFIG_TARGET_T1040D4D4RDB) || defined(CONFIG_TARGET_T1042D4RDB)
  72         printf("int_mask         = 0x%02x\n", CPLD_READ(int_mask));
  73 #else
  74         printf("led_ctl_status   = 0x%02x\n", CPLD_READ(led_ctl_status));
  75 #endif
  76         printf("sfp_ctl_status   = 0x%02x\n", CPLD_READ(sfp_ctl_status));
  77         printf("misc_ctl_status  = 0x%02x\n", CPLD_READ(misc_ctl_status));
  78         printf("boot_override    = 0x%02x\n", CPLD_READ(boot_override));
  79         printf("boot_config1     = 0x%02x\n", CPLD_READ(boot_config1));
  80         printf("boot_config2     = 0x%02x\n", CPLD_READ(boot_config2));
  81         putc('\n');
  82 }
  83 #endif
  84
  85 int do_cpld(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
  86 {
  87         int rc = 0;
  88
  89         if (argc <= 1)
  90                 return cmd_usage(cmdtp);
  91
  92         if (strcmp(argv[1], "reset") == 0) {
  93                 if (strcmp(argv[2], "altbank") == 0)
  94                         cpld_set_altbank();
  95                 else
  96                         cpld_set_defbank();
  97 #ifdef DEBUG
  98         } else if (strcmp(argv[1], "dump") == 0) {
  99                 cpld_dump_regs();
 100 #endif
 101         } else
 102                 rc = cmd_usage(cmdtp);
 103
 104         return rc;
 105 }
 106
 107 U_BOOT_CMD(
 108         cpld, CONFIG_SYS_MAXARGS, 1, do_cpld,
 109         "Reset the board or alternate bank",
 110         "reset - hard reset to default bank\n"
 111         "cpld reset altbank - reset to alternate bank\n"
 112 #ifdef DEBUG
 113         "cpld dump - display the CPLD registers\n"
 114 #endif
 115         );