mirror of
https://github.com/AsahiLinux/u-boot
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303dfc2e5e
This patch includes the following changes: - Remove Designware I2C support from dts as its not used - Configure SMBus PADs in dts - Enable I2C commands and I2C support - Configure SMSC2513 USB hub via SMBus upon startup - Move environment location to match Minnowmax example - Enhancement of the default environment Signed-off-by: Stefan Roese <sr@denx.de> Cc: Bin Meng <bmeng.cn@gmail.com> Cc: Simon Glass <sjg@chromium.org> Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
73 lines
1.4 KiB
C
73 lines
1.4 KiB
C
/*
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* Copyright (C) 2016 Stefan Roese <sr@denx.de>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <i2c.h>
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#include <winbond_w83627.h>
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#include <asm/gpio.h>
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#include <asm/ibmpc.h>
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#include <asm/pnp_def.h>
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int board_early_init_f(void)
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{
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#ifndef CONFIG_INTERNAL_UART
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/*
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* The FSP enables the BayTrail internal legacy UART (again).
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* Disable it again, so that the Winbond one can be used.
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*/
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setup_internal_uart(0);
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/* Enable the legacy UART in the Winbond W83627 Super IO chip */
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winbond_enable_serial(PNP_DEV(WINBOND_IO_PORT, W83627DHG_SP1),
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UART0_BASE, UART0_IRQ);
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#endif
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return 0;
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}
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int arch_early_init_r(void)
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{
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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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struct udevice *dev;
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u8 buf[8];
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int ret;
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/* Configure SMSC USB2513 USB Hub: 7bit address 0x2c */
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ret = i2c_get_chip_for_busnum(0, 0x2c, 1, &dev);
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if (ret) {
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printf("Cannot find USB2513: %d\n", ret);
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return 0;
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}
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/*
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* The first access to the USB Hub fails sometimes, so lets read
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* a dummy byte to be sure here
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*/
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dm_i2c_read(dev, 0x00, buf, 1);
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/*
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* The SMSC hub is not visible on the I2C bus after the first
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* configuration at power-up. The following code deliberately
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* does not report upon failure of these I2C write calls.
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*/
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buf[0] = 0x93;
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dm_i2c_write(dev, 0x06, buf, 1);
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buf[0] = 0xaa;
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dm_i2c_write(dev, 0xf8, buf, 1);
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buf[0] = 0x0f;
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dm_i2c_write(dev, 0xfa, buf, 1);
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buf[0] = 0x01;
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dm_i2c_write(dev, 0xff, buf, 1);
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return 0;
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}
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