From 303dfc2e5efeaebfb7f01f2e59e5870e645376ca Mon Sep 17 00:00:00 2001 From: Stefan Roese Date: Tue, 28 Jun 2016 15:45:13 +0200 Subject: 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 Cc: Bin Meng Cc: Simon Glass Reviewed-by: Bin Meng --- .../conga-qeval20-qa3-e3845/conga-qeval20-qa3.c | 40 ++++++++++++++++++++++ 1 file changed, 40 insertions(+) (limited to 'board/congatec') 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 +#include #include #include #include @@ -31,3 +32,42 @@ int arch_early_init_r(void) { 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; +} -- cgit v1.1