1 /* 2 * Copyright 2015 Freescale Semiconductor 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 * 6 * Freescale LS1043ARDB board-specific CPLD controlling supports. 7 */ 8 9 #include <common.h> 10 #include <command.h> 11 #include <asm/io.h> 12 #include "cpld.h" 13 14 u8 cpld_read(unsigned int reg) 15 { 16 void *p = (void *)CONFIG_SYS_CPLD_BASE; 17 18 return in_8(p + reg); 19 } 20 21 void cpld_write(unsigned int reg, u8 value) 22 { 23 void *p = (void *)CONFIG_SYS_CPLD_BASE; 24 25 out_8(p + reg, value); 26 } 27 28 /* Set the boot bank to the alternate bank */ 29 void cpld_set_altbank(void) 30 { 31 u8 reg4 = CPLD_READ(soft_mux_on); 32 u8 reg7 = CPLD_READ(vbank); 33 34 CPLD_WRITE(soft_mux_on, reg4 | CPLD_SW_MUX_BANK_SEL); 35 36 reg7 = (reg7 & ~CPLD_BANK_SEL_MASK) | CPLD_BANK_SEL_ALTBANK; 37 CPLD_WRITE(vbank, reg7); 38 39 CPLD_WRITE(system_rst, 1); 40 } 41 42 /* Set the boot bank to the default bank */ 43 void cpld_set_defbank(void) 44 { 45 CPLD_WRITE(global_rst, 1); 46 } 47 48 #ifdef DEBUG 49 static void cpld_dump_regs(void) 50 { 51 printf("cpld_ver = %x\n", CPLD_READ(cpld_ver)); 52 printf("cpld_ver_sub = %x\n", CPLD_READ(cpld_ver_sub)); 53 printf("pcba_ver = %x\n", CPLD_READ(pcba_ver)); 54 printf("soft_mux_on = %x\n", CPLD_READ(soft_mux_on)); 55 printf("cfg_rcw_src1 = %x\n", CPLD_READ(cfg_rcw_src1)); 56 printf("cfg_rcw_src2 = %x\n", CPLD_READ(cfg_rcw_src2)); 57 printf("vbank = %x\n", CPLD_READ(vbank)); 58 printf("sysclk_sel = %x\n", CPLD_READ(sysclk_sel)); 59 printf("uart_sel = %x\n", CPLD_READ(uart_sel)); 60 printf("sd1refclk_sel = %x\n", CPLD_READ(sd1refclk_sel)); 61 printf("tdmclk_mux_sel = %x\n", CPLD_READ(tdmclk_mux_sel)); 62 printf("sdhc_spics_sel = %x\n", CPLD_READ(sdhc_spics_sel)); 63 printf("status_led = %x\n", CPLD_READ(status_led)); 64 putc('\n'); 65 } 66 #endif 67 68 void cpld_rev_bit(unsigned char *value) 69 { 70 u8 rev_val, val; 71 int i; 72 73 val = *value; 74 rev_val = val & 1; 75 for (i = 1; i <= 7; i++) { 76 val >>= 1; 77 rev_val <<= 1; 78 rev_val |= val & 1; 79 } 80 81 *value = rev_val; 82 } 83 84 int do_cpld(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) 85 { 86 int rc = 0; 87 88 if (argc <= 1) 89 return cmd_usage(cmdtp); 90 91 if (strcmp(argv[1], "reset") == 0) { 92 if (strcmp(argv[2], "altbank") == 0) 93 cpld_set_altbank(); 94 else 95 cpld_set_defbank(); 96 #ifdef DEBUG 97 } else if (strcmp(argv[1], "dump") == 0) { 98 cpld_dump_regs(); 99 #endif 100 } else { 101 rc = cmd_usage(cmdtp); 102 } 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: 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 ); 116