1d259e4d68
This converts LEGO MINDSTORMS EV3 to the driver model. MMC, SERIAL, SPI and SPI_FLASH are converted. The device tree contains only the minimal nodes required by U-Boot since the size of U-Boot is limited to 256K on this device. Signed-off-by: David Lechner <david@lechnology.com>
152 lines
3.5 KiB
C
152 lines
3.5 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 <i2c.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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u8 board_rev;
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#define EEPROM_I2C_ADDR 0x50
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#define EEPROM_REV_OFFSET 0x3F00
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#define EEPROM_MAC_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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u32 get_board_rev(void)
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{
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u8 buf[2];
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if (!board_rev) {
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if (i2c_read(EEPROM_I2C_ADDR, EEPROM_REV_OFFSET, 2, buf, 2)) {
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printf("\nBoard revision read failed!\n");
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} else {
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/*
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* Board rev 3 has MAC 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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board_rev = buf[0];
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else
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board_rev = 3;
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}
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}
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return board_rev;
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}
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/*
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* The Bluetooth MAC address serves as the board serial number.
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*/
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void get_board_serial(struct tag_serialnr *serialnr)
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{
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u32 offset;
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u8 buf[6];
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if (!board_rev)
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board_rev = get_board_rev();
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/* Board rev 3 has MAC address where rev should be */
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offset = (board_rev == 3) ? EEPROM_REV_OFFSET : EEPROM_MAC_OFFSET;
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if (i2c_read(EEPROM_I2C_ADDR, offset, 2, buf, 6)) {
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printf("\nBoard serial read failed!\n");
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} else {
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u8 *nr;
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nr = (u8 *)&serialnr->low;
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nr[0] = buf[5];
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nr[1] = buf[4];
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nr[2] = buf[3];
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nr[3] = buf[2];
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nr = (u8 *)&serialnr->high;
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nr[0] = buf[1];
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nr[1] = buf[0];
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nr[2] = 0;
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nr[3] = 0;
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}
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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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