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 printf("led_ctl_status = 0x%02x\n", CPLD_READ(led_ctl_status)); 73 printf("sfp_ctl_status = 0x%02x\n", CPLD_READ(sfp_ctl_status)); 74 printf("misc_ctl_status = 0x%02x\n", CPLD_READ(misc_ctl_status)); 75 printf("boot_override = 0x%02x\n", CPLD_READ(boot_override)); 76 printf("boot_config1 = 0x%02x\n", CPLD_READ(boot_config1)); 77 printf("boot_config2 = 0x%02x\n", CPLD_READ(boot_config2)); 78 putc('\n'); 79 } 80 #endif 81 82 int do_cpld(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 83 { 84 int rc = 0; 85 86 if (argc <= 1) 87 return cmd_usage(cmdtp); 88 89 if (strcmp(argv[1], "reset") == 0) { 90 if (strcmp(argv[2], "altbank") == 0) 91 cpld_set_altbank(); 92 else 93 cpld_set_defbank(); 94 #ifdef DEBUG 95 } else if (strcmp(argv[1], "dump") == 0) { 96 cpld_dump_regs(); 97 #endif 98 } else 99 rc = cmd_usage(cmdtp); 100 101 return rc; 102 } 103 104 U_BOOT_CMD( 105 cpld, CONFIG_SYS_MAXARGS, 1, do_cpld, 106 "Reset the board or alternate bank", 107 "reset - hard reset to default bank\n" 108 "cpld reset altbank - reset to alternate bank\n" 109 #ifdef DEBUG 110 "cpld dump - display the CPLD registers\n" 111 #endif 112 ); 113