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/drivers/mtd/nand/pxa3xx_nand.h

@@ -0,0 +1,64 @@
+#ifndef __ASM_ARCH_PXA3XX_NAND_H
+#define __ASM_ARCH_PXA3XX_NAND_H
+
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/partitions.h>
+
+struct pxa3xx_nand_timing {
+	unsigned int	tCH;  /* Enable signal hold time */
+	unsigned int	tCS;  /* Enable signal setup time */
+	unsigned int	tWH;  /* ND_nWE high duration */
+	unsigned int	tWP;  /* ND_nWE pulse time */
+	unsigned int	tRH;  /* ND_nRE high duration */
+	unsigned int	tRP;  /* ND_nRE pulse width */
+	unsigned int	tR;   /* ND_nWE high to ND_nRE low for read */
+	unsigned int	tWHR; /* ND_nWE high to ND_nRE low for status read */
+	unsigned int	tAR;  /* ND_ALE low to ND_nRE low delay */
+};
+
+struct pxa3xx_nand_flash {
+	uint32_t	chip_id;
+	unsigned int	flash_width;    /* Width of Flash memory (DWIDTH_M) */
+	unsigned int	dfc_width;      /* Width of flash controller(DWIDTH_C) */
+	struct pxa3xx_nand_timing *timing; /* NAND Flash timing */
+};
+
+/*
+ * Current pxa3xx_nand controller has two chip select which
+ * both be workable.
+ *
+ * Notice should be taken that:
+ * When you want to use this feature, you should not enable the
+ * keep configuration feature, for two chip select could be
+ * attached with different nand chip. The different page size
+ * and timing requirement make the keep configuration impossible.
+ */
+
+/* The max num of chip select current support */
+#define NUM_CHIP_SELECT		(2)
+struct pxa3xx_nand_platform_data {
+	/* the data flash bus is shared between the Static Memory
+	 * Controller and the Data Flash Controller,  the arbiter
+	 * controls the ownership of the bus
+	 */
+	int	enable_arbiter;
+
+	/* allow platform code to keep OBM/bootloader defined NFC config */
+	int	keep_config;
+
+	/* indicate how many chip selects will be used */
+	int	num_cs;
+
+	/* use an flash-based bad block table */
+	bool	flash_bbt;
+
+	/* requested ECC strength and ECC step size */
+	int ecc_strength, ecc_step_size;
+
+	const struct mtd_partition		*parts[NUM_CHIP_SELECT];
+	unsigned int				nr_parts[NUM_CHIP_SELECT];
+
+	const struct pxa3xx_nand_flash		*flash;
+	size_t					num_flash;
+};
+#endif /* __ASM_ARCH_PXA3XX_NAND_H */