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-rw-r--r--board/freescale/t104xrdb/cpld.c112
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 0000000000..df0e348d4a
--- /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
+ );