1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright (C) 2016 Stefan Roese <sr@denx.de>
4 */
5
6#include <common.h>
7#include <i2c.h>
8#include <init.h>
9#include <winbond_w83627.h>
10#include <asm/gpio.h>
11#include <asm/ibmpc.h>
12#include <asm/pnp_def.h>
13
14int board_early_init_f(void)
15{
16#ifndef CONFIG_INTERNAL_UART
17	/*
18	 * The FSP enables the BayTrail internal legacy UART (again).
19	 * Disable it again, so that the Winbond one can be used.
20	 */
21	setup_internal_uart(0);
22
23	/* Enable the legacy UART in the Winbond W83627 Super IO chip */
24	winbond_enable_serial(PNP_DEV(WINBOND_IO_PORT, W83627DHG_SP1),
25			      UART0_BASE, UART0_IRQ);
26#endif
27
28	return 0;
29}
30
31int board_late_init(void)
32{
33	struct udevice *dev;
34	u8 buf[8];
35	int ret;
36
37	/* Configure SMSC USB2513 USB Hub: 7bit address 0x2c */
38	ret = i2c_get_chip_for_busnum(0, 0x2c, 1, &dev);
39	if (ret) {
40		printf("Cannot find USB2513: %d\n", ret);
41		return 0;
42	}
43
44	/*
45	 * The first access to the USB Hub fails sometimes, so lets read
46	 * a dummy byte to be sure here
47	 */
48	dm_i2c_read(dev, 0x00, buf, 1);
49
50	/*
51	 * The SMSC hub is not visible on the I2C bus after the first
52	 * configuration at power-up. The following code deliberately
53	 * does not report upon failure of these I2C write calls.
54	 */
55	buf[0] = 0x93;
56	dm_i2c_write(dev, 0x06, buf, 1);
57
58	buf[0] = 0xaa;
59	dm_i2c_write(dev, 0xf8, buf, 1);
60
61	buf[0] = 0x0f;
62	dm_i2c_write(dev, 0xfa, buf, 1);
63
64	buf[0] = 0x01;
65	dm_i2c_write(dev, 0xff, buf, 1);
66
67	return 0;
68}
69