upstream u-boot with additional patches for our devices/boards: https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ; Gbit ethernet patch for some LIME2 revisions ; with SPI flash support
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u-boot/include/configs/tny_a9260.h

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/*
* (C) Copyright 2007-2008
* Stelian Pop <stelian.pop@leadtechdesign.com>
* Lead Tech Design <www.leadtechdesign.com>
*
* Copyright (C) 2009
* Albin Tonnerre, Free Electrons <albin.tonnerre@free-electrons.com>
*
* Configuation settings for the Calao TNY-A9260 and TNY-A9G20 boards
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#ifndef __CONFIG_H
#define __CONFIG_H
#define CONFIG_AT91_LEGACY
#if defined(CONFIG_TNY_A9260_NANDFLASH) || defined(CONFIG_TNY_A9260_EEPROM)
#define CONFIG_TNY_A9260
#elif defined(CONFIG_TNY_A9G20_NANDFLASH) || defined(CONFIG_TNY_A9G20_EEPROM)
#define CONFIG_TNY_A9G20
#endif
#ifdef CONFIG_TNY_A9260
#define CONFIG_AT91SAM9260
#else
#define CONFIG_AT91SAM9G20
#endif
#if defined(CONFIG_TNY_A9260_NANDFLASH) || defined(CONFIG_TNY_A9G20_NANDFLASH)
#define CONFIG_ENV_IS_IN_NAND
#else
#define CONFIG_ENV_IS_IN_EEPROM
#endif
/* ARM asynchronous clock */
#define CONFIG_SYS_AT91_MAIN_CLOCK 12000000 /* 12 MHz crystal */
#define CONFIG_SYS_HZ 1000
#define CONFIG_ARM926EJS 1 /* This is an ARM926EJS Core */
#define CONFIG_ARCH_CPU_INIT
#undef CONFIG_USE_IRQ /* we don't need IRQ/FIQ stuff */
#define CONFIG_CMDLINE_TAG 1 /* enable passing of ATAGs */
#define CONFIG_SETUP_MEMORY_TAGS 1
#define CONFIG_INITRD_TAG 1
#define CONFIG_SKIP_LOWLEVEL_INIT
#define CONFIG_SKIP_RELOCATE_UBOOT
/*
* Hardware drivers
*/
#define CONFIG_AT91_GPIO 1
#define CONFIG_ATMEL_USART 1
#undef CONFIG_USART0
#undef CONFIG_USART1
#undef CONFIG_USART2
#define CONFIG_USART3 1 /* USART 3 is DBGU */
#define CONFIG_BOOTDELAY 3
/*
* Command line configuration.
*/
#include <config_cmd_default.h>
#undef CONFIG_CMD_BDI
#undef CONFIG_CMD_FPGA
#undef CONFIG_CMD_IMI
#undef CONFIG_CMD_IMLS
#undef CONFIG_CMD_LOADS
#undef CONFIG_CMD_NET
#undef CONFIG_CMD_SOURCE
#undef CONFIG_CMD_USB
/* SDRAM */
#define CONFIG_NR_DRAM_BANKS 1
#define PHYS_SDRAM 0x20000000
#define PHYS_SDRAM_SIZE 0x04000000 /* 64 megs */
/* SPI EEPROM */
#define CONFIG_SPI
#define CONFIG_CMD_SPI
#define CONFIG_ATMEL_SPI
#define CONFIG_SYS_SPI_WRITE_TOUT (5 * CONFIG_SYS_HZ)
#define CONFIG_CMD_EEPROM
#define CONFIG_SPI_M95XXX
#define CONFIG_SYS_EEPROM_SIZE 0x10000
#define CONFIG_SYS_EEPROM_PAGE_WRITE_BITS 5
/* NAND flash */
#define CONFIG_CMD_NAND
#define CONFIG_NAND_ATMEL
#define CONFIG_SYS_MAX_NAND_DEVICE 1
#define CONFIG_SYS_NAND_BASE 0x40000000
#define CONFIG_SYS_NAND_DBW_8 1
/* our ALE is AD21 */
#define CONFIG_SYS_NAND_MASK_ALE (1 << 21)
/* our CLE is AD22 */
#define CONFIG_SYS_NAND_MASK_CLE (1 << 22)
#define CONFIG_SYS_NAND_ENABLE_PIN AT91_PIN_PC14
#define CONFIG_SYS_NAND_READY_PIN AT91_PIN_PC13
/* NOR flash - no real flash on this board */
#define CONFIG_SYS_NO_FLASH 1
#define CONFIG_DOS_PARTITION 1
#define CONFIG_CMD_FAT 1
#define CONFIG_SYS_LOAD_ADDR 0x22000000 /* load address */
#define CONFIG_SYS_MEMTEST_START PHYS_SDRAM
#define CONFIG_SYS_MEMTEST_END 0x23e00000
/* Env in EEPROM, bootstrap + u-boot in NAND*/
#ifdef CONFIG_ENV_IS_IN_EEPROM
#define CONFIG_ENV_OFFSET 0x20
#define CONFIG_ENV_SIZE 0x1000
#endif
/* Env, bootstrap and u-boot in NAND */
#ifdef CONFIG_ENV_IS_IN_NAND
#define CONFIG_ENV_OFFSET 0x60000
#define CONFIG_ENV_OFFSET_REDUND 0x80000
#define CONFIG_ENV_SIZE 0x20000
#endif
#define CONFIG_BOOTCOMMAND "nboot 0x21000000 0 400000"
#define CONFIG_BOOTARGS "console=ttyS0,115200 " \
"root=/dev/mtdblock1 " \
"mtdparts=atmel_nand:16M(kernel)ro," \
"120M(rootfs),-(other) " \
"rw rootfstype=jffs2"
#define CONFIG_BAUDRATE 115200
#define CONFIG_SYS_BAUDRATE_TABLE {115200 , 19200, 38400, 57600, 9600 }
#define CONFIG_SYS_PROMPT "U-Boot> "
#define CONFIG_SYS_CBSIZE 256
#define CONFIG_SYS_MAXARGS 16
#define CONFIG_SYS_PBSIZE (CONFIG_SYS_CBSIZE + sizeof(CONFIG_SYS_PROMPT) + 16)
#define CONFIG_SYS_LONGHELP 1
#define CONFIG_CMDLINE_EDITING 1
/*
* Size of malloc() pool
*/
#define CONFIG_SYS_MALLOC_LEN ROUND(3 * CONFIG_ENV_SIZE + 128 * 1024, 0x1000)
#define CONFIG_SYS_GBL_DATA_SIZE 128 /* 128 bytes for initial data */
#define CONFIG_STACKSIZE (32 * 1024) /* regular stack */
#ifdef CONFIG_USE_IRQ
#error CONFIG_USE_IRQ not supported
#endif
#endif