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55153d6c30
T1040RDB and T1042RDB_PI has CPLD. Here CPLD controls board mux/features. This support of CPLD includes - files and register defintion - Commands to swtich alternate bank and default bank Signed-off-by: Prabhakar Kushwaha <prabhakar@freescale.com> Reviewed-by: York Sun <yorksun@freescale.com>
112 lines
2.7 KiB
C
112 lines
2.7 KiB
C
/**
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* Copyright 2014 Freescale Semiconductor
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*
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* SPDX-License-Identifier: GPL-2.0+
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*
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* This file provides support for the board-specific CPLD used on some Freescale
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* reference boards.
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*
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* The following macros need to be defined:
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*
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* CONFIG_SYS_CPLD_BASE-The virtual address of the base of the CPLD register map
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*/
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#include <common.h>
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#include <command.h>
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#include <asm/io.h>
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#include "cpld.h"
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u8 cpld_read(unsigned int reg)
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{
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void *p = (void *)CONFIG_SYS_CPLD_BASE;
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return in_8(p + reg);
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}
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void cpld_write(unsigned int reg, u8 value)
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{
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void *p = (void *)CONFIG_SYS_CPLD_BASE;
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out_8(p + reg, value);
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}
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/**
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* Set the boot bank to the alternate bank
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*/
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void cpld_set_altbank(void)
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{
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u8 reg = CPLD_READ(flash_ctl_status);
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reg = (reg & ~CPLD_BANK_SEL_MASK) | CPLD_LBMAP_ALTBANK;
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CPLD_WRITE(flash_ctl_status, reg);
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CPLD_WRITE(reset_ctl1, CPLD_LBMAP_RESET);
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}
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/**
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* Set the boot bank to the default bank
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*/
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void cpld_set_defbank(void)
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{
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u8 reg = CPLD_READ(flash_ctl_status);
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reg = (reg & ~CPLD_BANK_SEL_MASK) | CPLD_LBMAP_DFLTBANK;
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CPLD_WRITE(flash_ctl_status, reg);
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CPLD_WRITE(reset_ctl1, CPLD_LBMAP_RESET);
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}
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#ifdef DEBUG
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static void cpld_dump_regs(void)
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{
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printf("cpld_ver = 0x%02x\n", CPLD_READ(cpld_ver));
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printf("cpld_ver_sub = 0x%02x\n", CPLD_READ(cpld_ver_sub));
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printf("hw_ver = 0x%02x\n", CPLD_READ(hw_ver));
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printf("sw_ver = 0x%02x\n", CPLD_READ(sw_ver));
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printf("reset_ctl1 = 0x%02x\n", CPLD_READ(reset_ctl1));
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printf("reset_ctl2 = 0x%02x\n", CPLD_READ(reset_ctl2));
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printf("int_status = 0x%02x\n", CPLD_READ(int_status));
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printf("flash_ctl_status = 0x%02x\n", CPLD_READ(flash_ctl_status));
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printf("fan_ctl_status = 0x%02x\n", CPLD_READ(fan_ctl_status));
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printf("led_ctl_status = 0x%02x\n", CPLD_READ(led_ctl_status));
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printf("sfp_ctl_status = 0x%02x\n", CPLD_READ(sfp_ctl_status));
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printf("misc_ctl_status = 0x%02x\n", CPLD_READ(misc_ctl_status));
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printf("boot_override = 0x%02x\n", CPLD_READ(boot_override));
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printf("boot_config1 = 0x%02x\n", CPLD_READ(boot_config1));
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printf("boot_config2 = 0x%02x\n", CPLD_READ(boot_config2));
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putc('\n');
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}
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#endif
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int do_cpld(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
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{
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int rc = 0;
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if (argc <= 1)
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return cmd_usage(cmdtp);
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if (strcmp(argv[1], "reset") == 0) {
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if (strcmp(argv[2], "altbank") == 0)
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cpld_set_altbank();
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else
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cpld_set_defbank();
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#ifdef DEBUG
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} else if (strcmp(argv[1], "dump") == 0) {
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cpld_dump_regs();
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#endif
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} else
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rc = cmd_usage(cmdtp);
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return rc;
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}
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U_BOOT_CMD(
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cpld, CONFIG_SYS_MAXARGS, 1, do_cpld,
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"Reset the board or alternate bank",
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"reset - hard reset to default bank\n"
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"cpld reset altbank - reset to alternate bank\n"
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#ifdef DEBUG
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"cpld dump - display the CPLD registers\n"
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#endif
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);
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