GK SDK 源码库: XMIPCLinuxV100R005C00SPC030 (kernel/tools/open_source excluded)

source/bootloader/u-boot-2020.01/board/congatec/conga-qeval20-qa3-e3845/conga-qeval20-qa3.c

@@ -0,0 +1,68 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2016 Stefan Roese <sr@denx.de>
+ */
+
+#include <common.h>
+#include <i2c.h>
+#include <init.h>
+#include <winbond_w83627.h>
+#include <asm/gpio.h>
+#include <asm/ibmpc.h>
+#include <asm/pnp_def.h>
+
+int board_early_init_f(void)
+{
+#ifndef CONFIG_INTERNAL_UART
+	/*
+	 * The FSP enables the BayTrail internal legacy UART (again).
+	 * Disable it again, so that the Winbond one can be used.
+	 */
+	setup_internal_uart(0);
+
+	/* Enable the legacy UART in the Winbond W83627 Super IO chip */
+	winbond_enable_serial(PNP_DEV(WINBOND_IO_PORT, W83627DHG_SP1),
+			      UART0_BASE, UART0_IRQ);
+#endif
+
+	return 0;
+}
+
+int board_late_init(void)
+{
+	struct udevice *dev;
+	u8 buf[8];
+	int ret;
+
+	/* Configure SMSC USB2513 USB Hub: 7bit address 0x2c */
+	ret = i2c_get_chip_for_busnum(0, 0x2c, 1, &dev);
+	if (ret) {
+		printf("Cannot find USB2513: %d\n", ret);
+		return 0;
+	}
+
+	/*
+	 * The first access to the USB Hub fails sometimes, so lets read
+	 * a dummy byte to be sure here
+	 */
+	dm_i2c_read(dev, 0x00, buf, 1);
+
+	/*
+	 * The SMSC hub is not visible on the I2C bus after the first
+	 * configuration at power-up. The following code deliberately
+	 * does not report upon failure of these I2C write calls.
+	 */
+	buf[0] = 0x93;
+	dm_i2c_write(dev, 0x06, buf, 1);
+
+	buf[0] = 0xaa;
+	dm_i2c_write(dev, 0xf8, buf, 1);
+
+	buf[0] = 0x0f;
+	dm_i2c_write(dev, 0xfa, buf, 1);
+
+	buf[0] = 0x01;
+	dm_i2c_write(dev, 0xff, buf, 1);
+
+	return 0;
+}