diff options
Diffstat (limited to 'board/freescale/t208xrdb/cpld.c')
-rw-r--r-- | board/freescale/t208xrdb/cpld.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/board/freescale/t208xrdb/cpld.c b/board/freescale/t208xrdb/cpld.c new file mode 100644 index 0000000000..4aa126be54 --- /dev/null +++ b/board/freescale/t208xrdb/cpld.c @@ -0,0 +1,71 @@ +/* + * Copyright 2014 Freescale Semiconductor + * + * SPDX-License-Identifier: GPL-2.0+ + * + * Freescale T2080RDB board-specific CPLD controlling supports. + */ + +#include <common.h> +#include <command.h> +#include "cpld.h" + +u8 cpld_read(unsigned int reg) +{ + void *p = (void *)CONFIG_SYS_CPLD_BASE; + + return in_8(p + reg); +} + +void cpld_write(unsigned int reg, u8 value) +{ + void *p = (void *)CONFIG_SYS_CPLD_BASE; + + out_8(p + reg, value); +} + +/* Set the boot bank to the alternate bank */ +void cpld_set_altbank(void) +{ + u8 reg = CPLD_READ(flash_csr); + + reg = (reg & ~CPLD_BANK_SEL_MASK) | CPLD_LBMAP_ALTBANK; + CPLD_WRITE(flash_csr, reg); + CPLD_WRITE(reset_ctl, CPLD_LBMAP_RESET); +} + +/* Set the boot bank to the default bank */ +void cpld_set_defbank(void) +{ + u8 reg = CPLD_READ(flash_csr); + + reg = (reg & ~CPLD_BANK_SEL_MASK) | CPLD_LBMAP_DFLTBANK; + CPLD_WRITE(flash_csr, reg); + CPLD_WRITE(reset_ctl, CPLD_LBMAP_RESET); +} + +int do_cpld(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) +{ + int rc = 0; + + if (argc <= 1) + return cmd_usage(cmdtp); + + if (strcmp(argv[1], "reset") == 0) { + if (strcmp(argv[2], "altbank") == 0) + cpld_set_altbank(); + else + cpld_set_defbank(); + } else { + rc = cmd_usage(cmdtp); + } + + return rc; +} + +U_BOOT_CMD( + cpld, CONFIG_SYS_MAXARGS, 1, do_cpld, + "Reset the board or alternate bank", + "reset: reset to default bank\n" + "cpld reset altbank: reset to alternate bank\n" +); |