avionic design with actual uboot and tooling

submodule of avionic design uboot bootloader and with included tools to
get you started , read readme.md and readme-tk1-loader.md

u-boot/board/freescale/t102xrdb/cpld.c

@@ -0,0 +1,103 @@
+/**
+ * Copyright 2014 Freescale Semiconductor
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ *
+ * Freescale T1024RDB board-specific CPLD controlling supports.
+ *
+ * The following macros need to be defined:
+ */
+
+#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_csr);
+
+	reg = (reg & ~CPLD_BANK_SEL_MASK) | CPLD_LBMAP_ALTBANK;
+
+	CPLD_WRITE(flash_csr, 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_csr);
+
+	reg = (reg & ~CPLD_BANK_SEL_MASK) | CPLD_LBMAP_DFLTBANK;
+
+	CPLD_WRITE(flash_csr, reg);
+	CPLD_WRITE(reset_ctl1, CPLD_LBMAP_RESET);
+}
+
+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_csr	 = 0x%02x\n", CPLD_READ(flash_csr));
+	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');
+}
+
+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 if (strcmp(argv[1], "dump") == 0) {
+		cpld_dump_regs();
+	} 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"
+	"cpld dump - display the CPLD registers\n"
+	);