1 /* 2 * Copyright (C) 2016 Stefan Roese <sr@denx.de> 3 * 4 * SPDX-License-Identifier: GPL-2.0+ 5 */ 6 7 #include <common.h> 8 #include <i2c.h> 9 #include <winbond_w83627.h> 10 #include <asm/gpio.h> 11 #include <asm/ibmpc.h> 12 #include <asm/pnp_def.h> 13 14 int 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 31 int arch_early_init_r(void) 32 { 33 return 0; 34 } 35 36 int board_late_init(void) 37 { 38 struct udevice *dev; 39 u8 buf[8]; 40 int ret; 41 42 /* Configure SMSC USB2513 USB Hub: 7bit address 0x2c */ 43 ret = i2c_get_chip_for_busnum(0, 0x2c, 1, &dev); 44 if (ret) { 45 printf("Cannot find USB2513: %d\n", ret); 46 return 0; 47 } 48 49 /* 50 * The first access to the USB Hub fails sometimes, so lets read 51 * a dummy byte to be sure here 52 */ 53 dm_i2c_read(dev, 0x00, buf, 1); 54 55 /* 56 * The SMSC hub is not visible on the I2C bus after the first 57 * configuration at power-up. The following code deliberately 58 * does not report upon failure of these I2C write calls. 59 */ 60 buf[0] = 0x93; 61 dm_i2c_write(dev, 0x06, buf, 1); 62 63 buf[0] = 0xaa; 64 dm_i2c_write(dev, 0xf8, buf, 1); 65 66 buf[0] = 0x0f; 67 dm_i2c_write(dev, 0xfa, buf, 1); 68 69 buf[0] = 0x01; 70 dm_i2c_write(dev, 0xff, buf, 1); 71 72 return 0; 73 } 74