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/esd/vom405/vom405.c

@@ -0,0 +1,148 @@
+/*
+ * (C) Copyright 2001-2004
+ * Stefan Roese, esd gmbh germany, stefan.roese@esd-electronics.com
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <command.h>
+#include <malloc.h>
+#include <sja1000.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+extern void lxt971_no_sleep(void);
+
+/*
+ * generate a short spike on the CAN tx line
+ * to bring the couplers in sync
+ */
+void init_coupler(u32 addr)
+{
+	struct sja1000_basic_s *ctrl = (struct sja1000_basic_s *)addr;
+
+	/* reset */
+	out_8(&ctrl->cr, CR_RR);
+
+	/* dominant */
+	out_8(&ctrl->btr0, 0x00); /* btr setup is required */
+	out_8(&ctrl->btr1, 0x14); /* we use 1Mbit/s */
+	out_8(&ctrl->oc, OC_TP1 | OC_TN1 | OC_POL1 |
+	      OC_TP0 | OC_TN0 | OC_POL0 | OC_MODE1);
+	out_8(&ctrl->cr, 0x00);
+
+	/* delay */
+	in_8(&ctrl->cr);
+	in_8(&ctrl->cr);
+	in_8(&ctrl->cr);
+	in_8(&ctrl->cr);
+
+	/* reset */
+	out_8(&ctrl->cr, CR_RR);
+}
+
+int board_early_init_f (void)
+{
+	/*
+	 * IRQ 0-15  405GP internally generated; active high; level sensitive
+	 * IRQ 16    405GP internally generated; active low; level sensitive
+	 * IRQ 17-24 RESERVED
+	 * IRQ 25 (EXT IRQ 0) CAN0; active low; level sensitive
+	 * IRQ 26 (EXT IRQ 1) SER0 ; active low; level sensitive
+	 * IRQ 27 (EXT IRQ 2) SER1; active low; level sensitive
+	 * IRQ 28 (EXT IRQ 3) FPGA 0; active low; level sensitive
+	 * IRQ 29 (EXT IRQ 4) FPGA 1; active low; level sensitive
+	 * IRQ 30 (EXT IRQ 5) PCI INTA; active low; level sensitive
+	 * IRQ 31 (EXT IRQ 6) COMPACT FLASH; active high; level sensitive
+	 */
+	mtdcr(UIC0SR, 0xFFFFFFFF);       /* clear all ints */
+	mtdcr(UIC0ER, 0x00000000);       /* disable all ints */
+	mtdcr(UIC0CR, 0x00000000);       /* set all to be non-critical*/
+	mtdcr(UIC0PR, 0xFFFFFF80);       /* set int polarities */
+	mtdcr(UIC0TR, 0x10000000);       /* set int trigger levels */
+	mtdcr(UIC0VCR, 0x00000001);      /* set vect base=0,INT0 highest priority*/
+	mtdcr(UIC0SR, 0xFFFFFFFF);       /* clear all ints */
+
+	/*
+	 * EBC Configuration Register: set ready timeout to 512 ebc-clks -> ca. 15 us
+	 */
+	mtebc (EBC0_CFG, 0xa8400000); /* ebc always driven */
+
+	/*
+	 * Reset CPLD via GPIO12 (CS3) pin
+	 */
+	out_be32((void *)GPIO0_OR,
+		 in_be32((void *)GPIO0_OR) & ~(0x80000000 >> 12));
+	udelay(1000); /* wait 1ms */
+	out_be32((void *)GPIO0_OR,
+		 in_be32((void *)GPIO0_OR) | (0x80000000 >> 12));
+	udelay(1000); /* wait 1ms */
+
+	return 0;
+}
+
+int misc_init_r (void)
+{
+	/* adjust flash start and offset */
+	gd->bd->bi_flashstart = 0 - gd->bd->bi_flashsize;
+	gd->bd->bi_flashoffset = 0;
+
+	/*
+	 * Init magnetic coupler
+	 */
+	if (!getenv("noinitcoupler"))
+		init_coupler(CAN_BA);
+
+	return (0);
+}
+
+/*
+ * Check Board Identity:
+ */
+int checkboard (void)
+{
+	char str[64];
+	int i = getenv_f("serial#", str, sizeof(str));
+	int flashcnt;
+	int delay;
+	u8 *led_reg = (u8 *)(CAN_BA + 0x1000);
+
+	puts ("Board: ");
+
+	if (i == -1) {
+		puts ("### No HW ID - assuming VOM405");
+	} else {
+		puts(str);
+	}
+
+	printf(" (PLD-Version=%02d)\n", in_8(led_reg));
+
+	/*
+	 * Flash LEDs
+	 */
+	for (flashcnt = 0; flashcnt < 3; flashcnt++) {
+		out_8(led_reg, 0x40);        /* LED_B..D off */
+		for (delay = 0; delay < 100; delay++)
+			udelay(1000);
+		out_8(led_reg, 0x47);        /* LED_B..D on */
+		for (delay = 0; delay < 50; delay++)
+			udelay(1000);
+	}
+	out_8(led_reg, 0x40);
+
+	return 0;
+}
+
+void reset_phy(void)
+{
+#ifdef CONFIG_LXT971_NO_SLEEP
+
+	/*
+	 * Disable sleep mode in LXT971
+	 */
+	lxt971_no_sleep();
+#endif
+}