mirror of
https://github.com/AsahiLinux/u-boot
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68432b5d12
This sets the serial# environmet variable instead of using ATAGs on LEGO MINDSTORMS EV3. Also fix some nomenclature while we are touching this code (Bluetooth address is not the same as MAC address, EEPROM version is not the same as board version). Signed-off-by: David Lechner <david@lechnology.com>
145 lines
3.4 KiB
C
145 lines
3.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2016 David Lechner <david@lechnology.com>
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*
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* Based on da850evm.c
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*
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* Copyright (C) 2010 Texas Instruments Incorporated - http://www.ti.com/
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*
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* Based on da830evm.c. Original Copyrights follow:
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*
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* Copyright (C) 2009 Nick Thompson, GE Fanuc, Ltd. <nick.thompson@gefanuc.com>
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* Copyright (C) 2007 Sergey Kubushyn <ksi@koi8.net>
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*/
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#include <common.h>
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#include <env.h>
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#include <i2c.h>
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#include <init.h>
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#include <spi.h>
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#include <spi_flash.h>
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#include <asm/arch/hardware.h>
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#include <asm/arch/pinmux_defs.h>
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#include <asm/io.h>
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#include <asm/arch/davinci_misc.h>
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#include <linux/errno.h>
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#include <hwconfig.h>
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#include <asm/mach-types.h>
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#include <asm/setup.h>
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DECLARE_GLOBAL_DATA_PTR;
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#define EEPROM_I2C_ADDR 0x50
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#define EEPROM_REV_OFFSET 0x3F00
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#define EEPROM_BDADDR_OFFSET 0x3F06
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const struct pinmux_resource pinmuxes[] = {
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PINMUX_ITEM(spi0_pins_base),
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PINMUX_ITEM(spi0_pins_scs0),
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PINMUX_ITEM(uart1_pins_txrx),
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PINMUX_ITEM(i2c0_pins),
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PINMUX_ITEM(mmc0_pins),
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};
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const int pinmuxes_size = ARRAY_SIZE(pinmuxes);
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const struct lpsc_resource lpsc[] = {
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{ DAVINCI_LPSC_SPI0 }, /* Serial Flash */
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{ DAVINCI_LPSC_UART1 }, /* console */
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{ DAVINCI_LPSC_MMC_SD },
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};
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const int lpsc_size = ARRAY_SIZE(lpsc);
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/*
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* The Bluetooth address serves as the board serial number.
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*/
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static void setup_serial_number(void)
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{
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u32 offset;
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char serial_number[13];
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u8 buf[6];
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u8 eeprom_rev;
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if (env_get("serial#"))
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return;
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if (i2c_read(EEPROM_I2C_ADDR, EEPROM_REV_OFFSET, 2, buf, 2)) {
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printf("\nEEPROM revision read failed!\n");
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return;
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}
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/*
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* EEPROM rev 3 has Bluetooth address at EEPROM_REV_OFFSET.
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* Other revisions have checksum at EEPROM_REV_OFFSET+1
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* to detect this.
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*/
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if ((buf[0] ^ buf[1]) == 0xFF)
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eeprom_rev = buf[0];
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else
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eeprom_rev = 3;
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/* EEPROM rev 3 has Bluetooth address where rev should be */
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offset = (eeprom_rev == 3) ? EEPROM_REV_OFFSET : EEPROM_BDADDR_OFFSET;
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if (i2c_read(EEPROM_I2C_ADDR, offset, 2, buf, 6)) {
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printf("\nEEPROM serial read failed!\n");
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return;
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}
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sprintf(serial_number, "%02X%02X%02X%02X%02X%02X",
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buf[0], buf[1], buf[2], buf[3], buf[4], buf[5]);
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env_set("serial#", serial_number);
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}
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int board_early_init_f(void)
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{
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/* enable the console UART */
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writel((DAVINCI_UART_PWREMU_MGMT_FREE | DAVINCI_UART_PWREMU_MGMT_URRST |
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DAVINCI_UART_PWREMU_MGMT_UTRST),
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&davinci_uart1_ctrl_regs->pwremu_mgmt);
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/*
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* Power on required peripherals
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* ARM does not have access by default to PSC0 and PSC1
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* assuming here that the DSP bootloader has set the IOPU
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* such that PSC access is available to ARM
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*/
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if (da8xx_configure_lpsc_items(lpsc, ARRAY_SIZE(lpsc)))
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return 1;
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return 0;
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}
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int board_init(void)
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{
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irq_init();
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/* arch number of the board */
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/* LEGO didn't register for a unique number and uses da850evm */
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gd->bd->bi_arch_number = MACH_TYPE_DAVINCI_DA850_EVM;
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/* address of boot parameters */
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gd->bd->bi_boot_params = LINUX_BOOT_PARAM_ADDR;
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/* setup the SUSPSRC for ARM to control emulation suspend */
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writel(readl(&davinci_syscfg_regs->suspsrc) &
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~(DAVINCI_SYSCFG_SUSPSRC_I2C |
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DAVINCI_SYSCFG_SUSPSRC_SPI0 | DAVINCI_SYSCFG_SUSPSRC_TIMER0 |
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DAVINCI_SYSCFG_SUSPSRC_UART1),
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&davinci_syscfg_regs->suspsrc);
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/* configure pinmux settings */
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if (davinci_configure_pin_mux_items(pinmuxes, ARRAY_SIZE(pinmuxes)))
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return 1;
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return 0;
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}
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int board_late_init(void)
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{
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setup_serial_number();
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return 0;
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}
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