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/amazon/kc1/Kconfig

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+if TARGET_KC1
+
+config SYS_BOARD
+	default "kc1"
+
+config SYS_VENDOR
+	default "amazon"
+
+config SYS_CONFIG_NAME
+	default "kc1"
+
+endif

u-boot/board/amazon/kc1/MAINTAINERS

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+KC1 BOARD
+M:	Paul Kocialkowski <contact@paulk.fr>
+S:	Maintained
+F:	board/amazon/kc1/
+F:	include/configs/kc1.h
+F:	configs/kc1_defconfig

u-boot/board/amazon/kc1/Makefile

@@ -0,0 +1,9 @@
+#
+# Amazon Kindle Fire (first generation) codename kc1 config
+#
+# Copyright (C) 2016 Paul Kocialkowski <contact@paulk.fr>
+#
+# SPDX-License-Identifier:	GPL-2.0+
+#
+
+obj-y := kc1.o

u-boot/board/amazon/kc1/kc1.c

@@ -0,0 +1,179 @@
+/*
+ * Amazon Kindle Fire (first generation) codename kc1 config
+ *
+ * Copyright (C) 2016 Paul Kocialkowski <contact@paulk.fr>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <config.h>
+#include <common.h>
+#include <linux/ctype.h>
+#include <linux/usb/musb.h>
+#include <asm/omap_musb.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/arch/mmc_host_def.h>
+#include <asm/gpio.h>
+#include <asm/emif.h>
+#include <twl6030.h>
+#include "kc1.h"
+
+DECLARE_GLOBAL_DATA_PTR;
+
+const struct omap_sysinfo sysinfo = {
+	.board_string = "kc1"
+};
+
+static struct musb_hdrc_config musb_config = {
+	.multipoint = 1,
+	.dyn_fifo = 1,
+	.num_eps = 16,
+	.ram_bits = 12
+};
+
+static struct omap_musb_board_data musb_board_data = {
+	.interface_type	= MUSB_INTERFACE_UTMI,
+};
+
+static struct musb_hdrc_platform_data musb_platform_data = {
+	.mode = MUSB_PERIPHERAL,
+	.config = &musb_config,
+	.power = 100,
+	.platform_ops = &omap2430_ops,
+	.board_data = &musb_board_data,
+};
+
+
+void set_muxconf_regs(void)
+{
+	do_set_mux((*ctrl)->control_padconf_core_base, core_padconf_array,
+		sizeof(core_padconf_array) / sizeof(struct pad_conf_entry));
+}
+
+struct lpddr2_device_details *emif_get_device_details(u32 emif_nr, u8 cs,
+	struct lpddr2_device_details *lpddr2_dev_details)
+{
+	if (cs == CS1)
+		return NULL;
+
+	*lpddr2_dev_details = elpida_2G_S4_details;
+
+	return lpddr2_dev_details;
+}
+
+void emif_get_device_timings(u32 emif_nr,
+	const struct lpddr2_device_timings **cs0_device_timings,
+	const struct lpddr2_device_timings **cs1_device_timings)
+{
+	*cs0_device_timings = &elpida_2G_S4_timings;
+	*cs1_device_timings = NULL;
+}
+
+int board_init(void)
+{
+	/* GPMC init */
+	gpmc_init();
+
+	/* MACH number */
+	gd->bd->bi_arch_number = MACH_TYPE_OMAP_4430SDP;
+
+	/* ATAGs location */
+	gd->bd->bi_boot_params = OMAP44XX_DRAM_ADDR_SPACE_START + 0x100;
+
+	return 0;
+}
+
+int misc_init_r(void)
+{
+	char reboot_mode[2] = { 0 };
+	u32 data = 0;
+	u32 value;
+	int rc;
+
+	/* Reboot mode */
+
+	rc = omap_reboot_mode(reboot_mode, sizeof(reboot_mode));
+
+	/* USB ID pin pull-up indicates factory (fastboot) cable detection. */
+	gpio_request(KC1_GPIO_USB_ID, "USB_ID");
+	gpio_direction_input(KC1_GPIO_USB_ID);
+	value = gpio_get_value(KC1_GPIO_USB_ID);
+
+	if (value)
+		reboot_mode[0] = 'b';
+
+	if (rc < 0 || reboot_mode[0] == 'o') {
+		/*
+		 * When not rebooting, valid power on reasons are either the
+		 * power button, charger plug or USB plug.
+		 */
+
+		data |= twl6030_input_power_button();
+		data |= twl6030_input_charger();
+		data |= twl6030_input_usb();
+
+		if (!data)
+			twl6030_power_off();
+	}
+
+	if (reboot_mode[0] > 0 && isascii(reboot_mode[0])) {
+		if (!getenv("reboot-mode"))
+			setenv("reboot-mode", (char *)reboot_mode);
+	}
+
+	omap_reboot_mode_clear();
+
+	/* Serial number */
+
+	omap_die_id_serial();
+
+	/* MUSB */
+
+	musb_register(&musb_platform_data, &musb_board_data, (void *)MUSB_BASE);
+
+	return 0;
+}
+
+u32 get_board_rev(void)
+{
+	u32 value = 0;
+
+	gpio_request(KC1_GPIO_MBID0, "MBID0");
+	gpio_request(KC1_GPIO_MBID1, "MBID1");
+	gpio_request(KC1_GPIO_MBID2, "MBID2");
+	gpio_request(KC1_GPIO_MBID3, "MBID3");
+
+	gpio_direction_input(KC1_GPIO_MBID0);
+	gpio_direction_input(KC1_GPIO_MBID1);
+	gpio_direction_input(KC1_GPIO_MBID2);
+	gpio_direction_input(KC1_GPIO_MBID3);
+
+	value |= (gpio_get_value(KC1_GPIO_MBID0) << 0);
+	value |= (gpio_get_value(KC1_GPIO_MBID1) << 1);
+	value |= (gpio_get_value(KC1_GPIO_MBID2) << 2);
+	value |= (gpio_get_value(KC1_GPIO_MBID3) << 3);
+
+	return value;
+}
+
+void get_board_serial(struct tag_serialnr *serialnr)
+{
+	omap_die_id_get_board_serial(serialnr);
+}
+
+int fb_set_reboot_flag(void)
+{
+	return omap_reboot_mode_store("b");
+}
+
+#ifndef CONFIG_SPL_BUILD
+int board_mmc_init(bd_t *bis)
+{
+	return omap_mmc_init(1, 0, 0, -1, -1);
+}
+#endif
+
+void board_mmc_power_init(void)
+{
+	twl6030_power_mmc_init(1);
+}

u-boot/board/amazon/kc1/kc1.h

@@ -0,0 +1,98 @@
+/*
+ * Amazon Kindle Fire (first generation) codename kc1 config
+ *
+ * Copyright (C) 2016 Paul Kocialkowski <contact@paulk.fr>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef _KC1_H_
+#define _KC1_H_
+
+#include <asm/arch/mux_omap4.h>
+
+#define KC1_GPIO_USB_ID		52
+#define KC1_GPIO_MBID1		173
+#define KC1_GPIO_MBID0		174
+#define KC1_GPIO_MBID3		177
+#define KC1_GPIO_MBID2		178
+
+const struct pad_conf_entry core_padconf_array[] = {
+	/* GPMC */
+	{ GPMC_AD0,		(IEN  | PTU | M1) }, /* sdmmc2_dat0 */
+	{ GPMC_AD1,		(IEN  | PTU | M1) }, /* sdmmc2_dat1 */
+	{ GPMC_AD2,		(IEN  | PTU | M1) }, /* sdmmc2_dat2 */
+	{ GPMC_AD3,		(IEN  | PTU | M1) }, /* sdmmc2_dat3 */
+	{ GPMC_AD4,		(IEN  | PTU | M1) }, /* sdmmc2_dat4 */
+	{ GPMC_AD5,		(IEN  | PTU | M1) }, /* sdmmc2_dat5 */
+	{ GPMC_AD6,		(IEN  | PTU | M1) }, /* sdmmc2_dat6 */
+	{ GPMC_AD7,		(IEN  | PTU | M1) }, /* sdmmc2_dat7 */
+	{ GPMC_NOE,		(IEN  | PTU | M1) }, /* sdmmc2_clk */
+	{ GPMC_NWE,		(IEN  | PTU | M1) }, /* sdmmc2_cmd */
+	{ GPMC_NCS2,		(IEN  | PTD | M3) }, /* gpio_52 */
+	/* CAM */
+	{ CAM_SHUTTER,		(IDIS | DIS | M7) }, /* safe_mode */
+	{ CAM_STROBE,		(IDIS | DIS | M7) }, /* safe_mode */
+	{ CAM_GLOBALRESET,	(IDIS | DIS | M7) }, /* safe_mode */
+	/* HDQ */
+	{ HDQ_SIO,		(IDIS | DIS | M7) }, /* safe_mode */
+	/* I2C1 */
+	{ I2C1_SCL,		(IEN  | PTU | M0) }, /* i2c1_scl */
+	{ I2C1_SDA,		(IEN  | PTU | M0) }, /* i2c1_sda */
+	/* I2C2 */
+	{ I2C2_SCL,		(IEN  | PTU | M0) }, /* i2c2_scl */
+	{ I2C2_SDA,		(IEN  | PTU | M0) }, /* i2c2_sda */
+	/* I2C3 */
+	{ I2C3_SCL,		(IEN  | PTU | M0) }, /* i2c3_scl */
+	{ I2C3_SDA,		(IEN  | PTU | M0) }, /* i2c3_sda */
+	/* I2C4 */
+	{ I2C4_SCL,		(IEN  | PTU | M0) }, /* i2c4_scl */
+	{ I2C4_SDA,		(IEN  | PTU | M0) }, /* i2c4_sda */
+	/* MCSPI1 */
+	{ MCSPI1_CLK,		(IDIS | DIS | M7) }, /* safe_mode */
+	{ MCSPI1_SOMI,		(IDIS | DIS | M7) }, /* safe_mode */
+	{ MCSPI1_SIMO,		(IDIS | DIS | M7) }, /* safe_mode */
+	{ MCSPI1_CS0,		(IDIS | DIS | M7) }, /* safe_mode */
+	{ MCSPI1_CS1,		(IDIS | DIS | M7) }, /* safe_mode */
+	{ MCSPI1_CS2,		(IDIS | DIS | M7) }, /* safe_mode */
+	{ MCSPI1_CS3,		(IDIS | DIS | M7) }, /* safe_mode */
+	/* UART3 */
+	{ UART3_CTS_RCTX,	(IDIS | DIS | M7) }, /* safe_mode */
+	{ UART3_RTS_SD,		(IDIS | DIS | M7) }, /* safe_mode */
+	{ UART3_RX_IRRX,	(IEN  | DIS | M0) }, /* uart3_rx_irrx */
+	{ UART3_TX_IRTX,	(IDIS | DIS | M0) }, /* uart3_tx_irtx */
+	/* SDMMC5 */
+	{ SDMMC5_CLK,		(IEN  | PTU | M0) }, /* sdmmc5_clk */
+	{ SDMMC5_CMD,		(IEN  | PTU | M0) }, /* sdmmc5_cmd */
+	{ SDMMC5_DAT0,		(IEN  | PTU | M0) }, /* sdmmc5_dat0 */
+	{ SDMMC5_DAT1,		(IEN  | PTU | M0) }, /* sdmmc5_dat1 */
+	{ SDMMC5_DAT2,		(IEN  | PTU | M0) }, /* sdmmc5_dat2 */
+	{ SDMMC5_DAT3,		(IEN  | PTU | M0) }, /* sdmmc5_dat3 */
+	/* MCSPI4 */
+	{ MCSPI4_CLK,		(IEN  | DIS | M0) }, /* mcspi4_clk */
+	{ MCSPI4_SIMO,		(IEN  | DIS | M0) }, /* mcspi4_simo */
+	{ MCSPI4_SOMI,		(IEN  | DIS | M0) }, /* mcspi4_somi */
+	{ MCSPI4_CS0,		(IEN  | PTD | M0) }, /* mcspi4_cs0 */
+	/* UART4 */
+	{ UART4_RX,		(IDIS | DIS | M4) }, /* gpio_155 */
+	{ UART4_TX,		(IDIS | DIS | M7) }, /* safe_mode */
+	/* UNIPRO */
+	{ UNIPRO_TX0,		(IDIS | DIS | M7) }, /* safe_mode */
+	{ UNIPRO_TY0,		(IDIS | DIS | M7) }, /* safe_mode */
+	{ UNIPRO_TX1,		(IEN  | DIS | M3) }, /* gpio_173 */
+	{ UNIPRO_TY1,		(IEN  | DIS | M3) }, /* gpio_174 */
+	{ UNIPRO_TX2,		(IDIS | DIS | M7) }, /* safe_mode */
+	{ UNIPRO_TY2,		(IDIS | DIS | M7) }, /* safe_mode */
+	{ UNIPRO_RX0,		(IEN  | DIS | M3) }, /* gpio_175 */
+	{ UNIPRO_RY0,		(IEN  | DIS | M3) }, /* gpio_176 */
+	{ UNIPRO_RX1,		(IEN  | DIS | M3) }, /* gpio_177 */
+	{ UNIPRO_RY1,		(IEN  | DIS | M3) }, /* gpio_178 */
+	{ UNIPRO_RX2,		(IDIS | DIS | M7) }, /* safe_mode */
+	{ UNIPRO_RY2,		(IDIS | DIS | M7) }, /* safe_mode */
+	/* USBA0_OTG */
+	{ USBA0_OTG_CE,		(IDIS | PTD | M0) }, /* usba0_otg_ce */
+	{ USBA0_OTG_DP,		(IEN  | DIS | M0) }, /* usba0_otg_dp */
+	{ USBA0_OTG_DM,		(IEN  | DIS | M0) }, /* usba0_otg_dm */
+};
+
+#endif