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/cm_t335.h

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/*
* Config file for Compulab CM-T335 board
*
* Copyright (C) 2013, Compulab Ltd - http://compulab.co.il/
*
* Author: Ilya Ledvich <ilya@compulab.co.il>
*
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef __CONFIG_CM_T335_H
#define __CONFIG_CM_T335_H
#define CONFIG_CM_T335
#define CONFIG_NAND
#include <configs/ti_am335x_common.h>
#undef CONFIG_BOARD_LATE_INIT
#undef CONFIG_SPI
#undef CONFIG_OMAP3_SPI
#undef CONFIG_CMD_SPI
#undef CONFIG_SPL_OS_BOOT
#undef CONFIG_BOOTCOUNT_LIMIT
#undef CONFIG_SPL_AM33XX_ENABLE_RTC32K_OSC
#undef CONFIG_MAX_RAM_BANK_SIZE
#define CONFIG_MAX_RAM_BANK_SIZE (512 << 20) /* 512MB */
#define CONFIG_OMAP_COMMON
#define MACH_TYPE_CM_T335 4586 /* Until the next sync */
#define CONFIG_MACH_TYPE MACH_TYPE_CM_T335
/* Clock Defines */
#define V_OSCK 25000000 /* Clock output from T2 */
#define V_SCLK (V_OSCK)
#define CONFIG_ENV_SIZE (16 << 10) /* 16 KiB */
#ifndef CONFIG_SPL_BUILD
#define MMCARGS \
"mmcdev=0\0" \
"mmcroot=/dev/mmcblk0p2 rw rootwait\0" \
"mmcrootfstype=ext4\0" \
"mmcargs=setenv bootargs console=${console} " \
"root=${mmcroot} " \
"rootfstype=${mmcrootfstype}\0" \
"mmcboot=echo Booting from mmc ...; " \
"run mmcargs; " \
"bootm ${loadaddr}\0"
#define NANDARGS \
"mtdids=" MTDIDS_DEFAULT "\0" \
"mtdparts=" MTDPARTS_DEFAULT "\0" \
"nandroot=ubi0:rootfs rw\0" \
"nandrootfstype=ubifs\0" \
"nandargs=setenv bootargs console=${console} " \
"root=${nandroot} " \
"rootfstype=${nandrootfstype} " \
"ubi.mtd=${rootfs_name}\0" \
"nandboot=echo Booting from nand ...; " \
"run nandargs; " \
"nboot ${loadaddr} nand0 900000; " \
"bootm ${loadaddr}\0"
#define CONFIG_EXTRA_ENV_SETTINGS \
"loadaddr=82000000\0" \
"console=ttyO0,115200n8\0" \
"rootfs_name=rootfs\0" \
"loadbootscript=fatload mmc ${mmcdev} ${loadaddr} boot.scr\0" \
"bootscript=echo Running bootscript from mmc ...; " \
"source ${loadaddr}\0" \
"loaduimage=fatload mmc ${mmcdev} ${loadaddr} uImage\0" \
MMCARGS \
NANDARGS
#define CONFIG_BOOTCOMMAND \
"mmc dev ${mmcdev}; if mmc rescan; then " \
"if run loadbootscript; then " \
"run bootscript; " \
"else " \
"if run loaduimage; then " \
"run mmcboot; " \
"else run nandboot; " \
"fi; " \
"fi; " \
"else run nandboot; fi"
#endif /* CONFIG_SPL_BUILD */
#define CONFIG_TIMESTAMP
#define CONFIG_SYS_AUTOLOAD "no"
/* Serial console configuration */
#define CONFIG_CONS_INDEX 1
#define CONFIG_SERIAL1 1 /* UART0 */
/* NS16550 Configuration */
#define CONFIG_SYS_NS16550_COM1 0x44e09000 /* UART0 */
#define CONFIG_SYS_NS16550_COM2 0x48022000 /* UART1 */
#define CONFIG_BAUDRATE 115200
/* I2C Configuration */
#define CONFIG_SYS_I2C_EEPROM_ADDR 0x50 /* Main EEPROM */
#define CONFIG_SYS_I2C_EEPROM_ADDR_LEN 1
#define CONFIG_SYS_I2C_EEPROM_BUS 0
/* SPL */
#define CONFIG_SPL_LDSCRIPT "$(CPUDIR)/am33xx/u-boot-spl.lds"
/* Network. */
#define CONFIG_PHY_GIGE
#define CONFIG_PHYLIB
#define CONFIG_PHY_ATHEROS
/* NAND support */
#define CONFIG_SYS_NAND_5_ADDR_CYCLE
#define CONFIG_SYS_NAND_PAGE_COUNT (CONFIG_SYS_NAND_BLOCK_SIZE / \
CONFIG_SYS_NAND_PAGE_SIZE)
#define CONFIG_SYS_NAND_PAGE_SIZE 2048
#define CONFIG_SYS_NAND_OOBSIZE 64
#define CONFIG_SYS_NAND_BLOCK_SIZE (128 * 1024)
#define CONFIG_SYS_NAND_BAD_BLOCK_POS NAND_LARGE_BADBLOCK_POS
#define CONFIG_SYS_NAND_ECCPOS { 2, 3, 4, 5, 6, 7, 8, 9, \
10, 11, 12, 13, 14, 15, 16, 17, \
18, 19, 20, 21, 22, 23, 24, 25, \
26, 27, 28, 29, 30, 31, 32, 33, \
34, 35, 36, 37, 38, 39, 40, 41, \
42, 43, 44, 45, 46, 47, 48, 49, \
50, 51, 52, 53, 54, 55, 56, 57, }
#define CONFIG_SYS_NAND_ECCSIZE 512
#define CONFIG_SYS_NAND_ECCBYTES 14
#define CONFIG_SYS_NAND_U_BOOT_START CONFIG_SYS_TEXT_BASE
#undef CONFIG_SYS_NAND_U_BOOT_OFFS
#define CONFIG_SYS_NAND_U_BOOT_OFFS 0x200000
#define CONFIG_CMD_NAND
#define MTDIDS_DEFAULT "nand0=nand"
#define MTDPARTS_DEFAULT "mtdparts=nand:2m(spl)," \
"1m(u-boot),1m(u-boot-env)," \
"1m(dtb),4m(splash)," \
"6m(kernel),-(rootfs)"
#define CONFIG_ENV_IS_IN_NAND
#define CONFIG_ENV_OFFSET 0x300000 /* environment starts here */
#define CONFIG_SYS_ENV_SECT_SIZE (128 << 10) /* 128 KiB */
#define CONFIG_SYS_NAND_ONFI_DETECTION
#ifdef CONFIG_SPL_OS_BOOT
#define CONFIG_CMD_SPL_NAND_OFS 0x400000 /* un-assigned: (using dtb) */
#define CONFIG_SYS_NAND_SPL_KERNEL_OFFS 0x500000
#define CONFIG_CMD_SPL_WRITE_SIZE 0x2000
#endif
/* GPIO pin + bank to pin ID mapping */
#define GPIO_PIN(_bank, _pin) ((_bank << 5) + _pin)
/* Status LED */
#define CONFIG_STATUS_LED
#define CONFIG_GPIO_LED
#define CONFIG_BOARD_SPECIFIC_LED
#define STATUS_LED_BIT GPIO_PIN(2, 0)
/* Status LED polarity is inversed, so init it in the "off" state */
#define STATUS_LED_STATE STATUS_LED_OFF
#define STATUS_LED_PERIOD (CONFIG_SYS_HZ / 2)
#define STATUS_LED_BOOT 0
#ifndef CONFIG_SPL_BUILD
/*
* Enable PCA9555 at I2C0-0x26.
* First select the I2C0 bus with "i2c dev 0", then use "pca953x" command.
*/
#define CONFIG_PCA953X
#define CONFIG_CMD_PCA953X
#define CONFIG_CMD_PCA953X_INFO
#define CONFIG_SYS_I2C_PCA953X_ADDR 0x26
#define CONFIG_SYS_I2C_PCA953X_WIDTH { {0x26, 16} }
#endif /* CONFIG_SPL_BUILD */
#endif /* __CONFIG_CM_T335_H */