x86: conga-qeval20-qa3: Add SMBus support and SMSC2513 config code
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>
diff --git a/board/congatec/conga-qeval20-qa3-e3845/conga-qeval20-qa3.c b/board/congatec/conga-qeval20-qa3-e3845/conga-qeval20-qa3.c
index 737e610..7a5b765 100644
--- a/board/congatec/conga-qeval20-qa3-e3845/conga-qeval20-qa3.c
+++ b/board/congatec/conga-qeval20-qa3-e3845/conga-qeval20-qa3.c
@@ -5,6 +5,7 @@
*/
#include <common.h>
+#include <i2c.h>
#include <winbond_w83627.h>
#include <asm/gpio.h>
#include <asm/ibmpc.h>
@@ -31,3 +32,42 @@
{
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;
+}