diff options
author | Prabhakar Kushwaha <prabhakar@freescale.com> | 2014-04-03 16:50:05 +0530 |
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committer | York Sun <yorksun@freescale.com> | 2014-04-22 17:58:48 -0700 |
commit | 55153d6c30d8ce11c8a7acf226375e61546b8401 (patch) | |
tree | 96a474dd83c7439816962410b186d1ec703acb89 /board/freescale/t104xrdb/cpld.c | |
parent | d616fc58e5ac56e2297761ad2ad530eb7df559f9 (diff) |
board/t104xrdb: Add support of CPLD
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>
Diffstat (limited to 'board/freescale/t104xrdb/cpld.c')
-rw-r--r-- | board/freescale/t104xrdb/cpld.c | 112 |
1 files changed, 112 insertions, 0 deletions
diff --git a/board/freescale/t104xrdb/cpld.c b/board/freescale/t104xrdb/cpld.c new file mode 100644 index 00000000000..df0e348d4af --- /dev/null +++ b/board/freescale/t104xrdb/cpld.c @@ -0,0 +1,112 @@ +/** + * Copyright 2014 Freescale Semiconductor + * + * 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" + +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_ctl_status); + + reg = (reg & ~CPLD_BANK_SEL_MASK) | CPLD_LBMAP_ALTBANK; + + CPLD_WRITE(flash_ctl_status, reg); + CPLD_WRITE(reset_ctl1, CPLD_LBMAP_RESET); +} + +/** + * Set the boot bank to the default bank + */ +void cpld_set_defbank(void) +{ + u8 reg = CPLD_READ(flash_ctl_status); + + reg = (reg & ~CPLD_BANK_SEL_MASK) | CPLD_LBMAP_DFLTBANK; + + CPLD_WRITE(flash_ctl_status, reg); + CPLD_WRITE(reset_ctl1, CPLD_LBMAP_RESET); +} + +#ifdef DEBUG +static void cpld_dump_regs(void) +{ + printf("cpld_ver = 0x%02x\n", CPLD_READ(cpld_ver)); + printf("cpld_ver_sub = 0x%02x\n", CPLD_READ(cpld_ver_sub)); + printf("hw_ver = 0x%02x\n", CPLD_READ(hw_ver)); + printf("sw_ver = 0x%02x\n", CPLD_READ(sw_ver)); + printf("reset_ctl1 = 0x%02x\n", CPLD_READ(reset_ctl1)); + printf("reset_ctl2 = 0x%02x\n", CPLD_READ(reset_ctl2)); + printf("int_status = 0x%02x\n", CPLD_READ(int_status)); + printf("flash_ctl_status = 0x%02x\n", CPLD_READ(flash_ctl_status)); + printf("fan_ctl_status = 0x%02x\n", CPLD_READ(fan_ctl_status)); + printf("led_ctl_status = 0x%02x\n", CPLD_READ(led_ctl_status)); + printf("sfp_ctl_status = 0x%02x\n", CPLD_READ(sfp_ctl_status)); + printf("misc_ctl_status = 0x%02x\n", CPLD_READ(misc_ctl_status)); + printf("boot_override = 0x%02x\n", CPLD_READ(boot_override)); + printf("boot_config1 = 0x%02x\n", CPLD_READ(boot_config1)); + printf("boot_config2 = 0x%02x\n", CPLD_READ(boot_config2)); + putc('\n'); +} +#endif + +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(); +#ifdef DEBUG + } else if (strcmp(argv[1], "dump") == 0) { + cpld_dump_regs(); +#endif + } else + rc = cmd_usage(cmdtp); + + return rc; +} + +U_BOOT_CMD( + cpld, CONFIG_SYS_MAXARGS, 1, do_cpld, + "Reset the board or alternate bank", + "reset - hard reset to default bank\n" + "cpld reset altbank - reset to alternate bank\n" +#ifdef DEBUG + "cpld dump - display the CPLD registers\n" +#endif + ); |