mirror of
https://github.com/AsahiLinux/u-boot
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f4e2c10a71
This drops assigning bi_arch_number on LEGO MINDSTORMS EV3. This board never had its own unique number and since we are using device tree, we no longer need to pass an arch number to Linux. Signed-off-by: David Lechner <david@lechnology.com>
141 lines
3.3 KiB
C
141 lines
3.3 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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/* 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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