1 /** 2 * Copyright 2014 Freescale Semiconductor 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 * 6 * This file provides support for the board-specific CPLD used on some Freescale 7 * reference boards. 8 * 9 * The following macros need to be defined: 10 * 11 * CONFIG_SYS_CPLD_BASE-The virtual address of the base of the CPLD register map 12 */ 13 14 #include <common.h> 15 #include <command.h> 16 #include <asm/io.h> 17 18 #include "cpld.h" 19 20 u8 cpld_read(unsigned int reg) 21 { 22 void *p = (void *)CONFIG_SYS_CPLD_BASE; 23 24 return in_8(p + reg); 25 } 26 27 void cpld_write(unsigned int reg, u8 value) 28 { 29 void *p = (void *)CONFIG_SYS_CPLD_BASE; 30 31 out_8(p + reg, value); 32 } 33 34 /** 35 * Set the boot bank to the alternate bank 36 */ 37 void cpld_set_altbank(void) 38 { 39 u8 reg = CPLD_READ(flash_ctl_status); 40 41 reg = (reg & ~CPLD_BANK_SEL_MASK) | CPLD_LBMAP_ALTBANK; 42 43 CPLD_WRITE(flash_ctl_status, reg); 44 CPLD_WRITE(reset_ctl1, CPLD_LBMAP_RESET); 45 } 46 47 /** 48 * Set the boot bank to the default bank 49 */ 50 void cpld_set_defbank(void) 51 { 52 u8 reg = CPLD_READ(flash_ctl_status); 53 54 reg = (reg & ~CPLD_BANK_SEL_MASK) | CPLD_LBMAP_DFLTBANK; 55 56 CPLD_WRITE(flash_ctl_status, reg); 57 CPLD_WRITE(reset_ctl1, CPLD_LBMAP_RESET); 58 } 59 60 #ifdef DEBUG 61 static void cpld_dump_regs(void) 62 { 63 printf("cpld_ver = 0x%02x\n", CPLD_READ(cpld_ver)); 64 printf("cpld_ver_sub = 0x%02x\n", CPLD_READ(cpld_ver_sub)); 65 printf("hw_ver = 0x%02x\n", CPLD_READ(hw_ver)); 66 printf("sw_ver = 0x%02x\n", CPLD_READ(sw_ver)); 67 printf("reset_ctl1 = 0x%02x\n", CPLD_READ(reset_ctl1)); 68 printf("reset_ctl2 = 0x%02x\n", CPLD_READ(reset_ctl2)); 69 printf("int_status = 0x%02x\n", CPLD_READ(int_status)); 70 printf("flash_ctl_status = 0x%02x\n", CPLD_READ(flash_ctl_status)); 71 printf("fan_ctl_status = 0x%02x\n", CPLD_READ(fan_ctl_status)); 72 #if defined(CONFIG_T104XD4RDB) 73 printf("int_mask = 0x%02x\n", CPLD_READ(int_mask)); 74 #else 75 printf("led_ctl_status = 0x%02x\n", CPLD_READ(led_ctl_status)); 76 #endif 77 printf("sfp_ctl_status = 0x%02x\n", CPLD_READ(sfp_ctl_status)); 78 printf("misc_ctl_status = 0x%02x\n", CPLD_READ(misc_ctl_status)); 79 printf("boot_override = 0x%02x\n", CPLD_READ(boot_override)); 80 printf("boot_config1 = 0x%02x\n", CPLD_READ(boot_config1)); 81 printf("boot_config2 = 0x%02x\n", CPLD_READ(boot_config2)); 82 putc('\n'); 83 } 84 #endif 85 86 int do_cpld(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 87 { 88 int rc = 0; 89 90 if (argc <= 1) 91 return cmd_usage(cmdtp); 92 93 if (strcmp(argv[1], "reset") == 0) { 94 if (strcmp(argv[2], "altbank") == 0) 95 cpld_set_altbank(); 96 else 97 cpld_set_defbank(); 98 #ifdef DEBUG 99 } else if (strcmp(argv[1], "dump") == 0) { 100 cpld_dump_regs(); 101 #endif 102 } else 103 rc = cmd_usage(cmdtp); 104 105 return rc; 106 } 107 108 U_BOOT_CMD( 109 cpld, CONFIG_SYS_MAXARGS, 1, do_cpld, 110 "Reset the board or alternate bank", 111 "reset - hard reset to default bank\n" 112 "cpld reset altbank - reset to alternate bank\n" 113 #ifdef DEBUG 114 "cpld dump - display the CPLD registers\n" 115 #endif 116 ); 117