diff options
Diffstat (limited to 'board/freescale/c29xpcie/cpld.c')
| -rw-r--r-- | board/freescale/c29xpcie/cpld.c | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/board/freescale/c29xpcie/cpld.c b/board/freescale/c29xpcie/cpld.c new file mode 100644 index 000000000..5cbccff63 --- /dev/null +++ b/board/freescale/c29xpcie/cpld.c @@ -0,0 +1,131 @@ +/** + * Copyright 2013 Freescale Semiconductor + * Author: Mingkai Hu <Mingkai.hu@freescale.com> + * Po Liu <Po.Liu@freescale.com> + * + * SPDX-License-Identifier: GPL-2.0+ + * + * This file provides support for the board-specific CPLD used on some Freescale + * reference boards. + * + * The following macros need to be defined: + * + * CONFIG_SYS_CPLD_BASE - The virtual address of the base of the + * CPLD register map + * + */ + +#include <common.h> +#include <command.h> +#include <asm/io.h> + +#include "cpld.h" +/** + * Set the boot bank to the alternate bank + */ +void cpld_set_altbank(u8 banksel) +{ + struct cpld_data *cpld_data = (void *)(CONFIG_SYS_CPLD_BASE); + u8 reg11; + + reg11 = in_8(&cpld_data->flhcsr); + + switch (banksel) { + case 1: + out_8(&cpld_data->flhcsr, (reg11 & CPLD_BANKSEL_MASK) + | CPLD_BANKSEL_EN | CPLD_SELECT_BANK1); + break; + case 2: + out_8(&cpld_data->flhcsr, (reg11 & CPLD_BANKSEL_MASK) + | CPLD_BANKSEL_EN | CPLD_SELECT_BANK2); + break; + case 3: + out_8(&cpld_data->flhcsr, (reg11 & CPLD_BANKSEL_MASK) + | CPLD_BANKSEL_EN | CPLD_SELECT_BANK3); + break; + case 4: + out_8(&cpld_data->flhcsr, (reg11 & CPLD_BANKSEL_MASK) + | CPLD_BANKSEL_EN | CPLD_SELECT_BANK4); + break; + default: + printf("Invalid value! [1-4]\n"); + return; + } + + udelay(100); + do_reset(NULL, 0, 0, NULL); +} + +/** + * Set the boot bank to the default bank + */ +void cpld_set_defbank(void) +{ + cpld_set_altbank(4); +} + +#ifdef DEBUG +static void cpld_dump_regs(void) +{ + struct cpld_data *cpld_data = (void *)(CONFIG_SYS_CPLD_BASE); + + printf("chipid1 = 0x%02x\n", in_8(&cpld_data->chipid1)); + printf("chipid2 = 0x%02x\n", in_8(&cpld_data->chipid2)); + printf("hwver = 0x%02x\n", in_8(&cpld_data->hwver)); + printf("cpldver = 0x%02x\n", in_8(&cpld_data->cpldver)); + printf("rstcon = 0x%02x\n", in_8(&cpld_data->rstcon)); + printf("flhcsr = 0x%02x\n", in_8(&cpld_data->flhcsr)); + printf("wdcsr = 0x%02x\n", in_8(&cpld_data->wdcsr)); + printf("wdkick = 0x%02x\n", in_8(&cpld_data->wdkick)); + printf("fancsr = 0x%02x\n", in_8(&cpld_data->fancsr)); + printf("ledcsr = 0x%02x\n", in_8(&cpld_data->ledcsr)); + printf("misc = 0x%02x\n", in_8(&cpld_data->misccsr)); + printf("bootor = 0x%02x\n", in_8(&cpld_data->bootor)); + printf("bootcfg1 = 0x%02x\n", in_8(&cpld_data->bootcfg1)); + printf("bootcfg2 = 0x%02x\n", in_8(&cpld_data->bootcfg2)); + printf("bootcfg3 = 0x%02x\n", in_8(&cpld_data->bootcfg3)); + printf("bootcfg4 = 0x%02x\n", in_8(&cpld_data->bootcfg4)); + putc('\n'); +} +#endif + +int cpld_cmd(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + int rc = 0; + unsigned char value; + + if (argc <= 1) + return cmd_usage(cmdtp); + + if (strcmp(argv[1], "reset") == 0) { + if (!strcmp(argv[2], "altbank") && argv[3]) { + value = (u8)simple_strtoul(argv[3], NULL, 16); + cpld_set_altbank(value); + } else if (!argv[2]) + cpld_set_defbank(); + else + cmd_usage(cmdtp); +#ifdef DEBUG + } else if (strcmp(argv[1], "dump") == 0) { + cpld_dump_regs(); +#endif + } else + rc = cmd_usage(cmdtp); + + return rc; +} + +U_BOOT_CMD( + cpld_cmd, CONFIG_SYS_MAXARGS, 1, cpld_cmd, + "Reset the board using the CPLD sequencer", + "reset - hard reset to default bank 4\n" + "cpld_cmd reset altbank [bank]- reset to alternate bank\n" + " - [bank] bank value select 1-4\n" + " - bank 1 on the flash 0x0000000~0x0ffffff\n" + " - bank 2 on the flash 0x1000000~0x1ffffff\n" + " - bank 3 on the flash 0x2000000~0x2ffffff\n" + " - bank 4 on the flash 0x3000000~0x3ffffff\n" +#ifdef DEBUG + "cpld_cmd dump - display the CPLD registers\n" +#endif + ); |