x86: dfi-bt700: Add xHCI USB support
Change from EHCI to xHCI on the DFI BayTrail SoM.
The xHCI USB hub is connected to an GPIO on the DFI BayTrail SoM. For
correct operation, it needs to get reset upon power-up. Otherwise it
may happen that the hub is not detected after a software reboot. This
patch also configures this GPIO in the dts for correct operation.
Signed-off-by: Stefan Roese <sr@denx.de>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/board/dfi/dfi-bt700/Kconfig b/board/dfi/dfi-bt700/Kconfig
index 3f0acb3..fca8b53 100644
--- a/board/dfi/dfi-bt700/Kconfig
+++ b/board/dfi/dfi-bt700/Kconfig
@@ -21,6 +21,7 @@
select X86_RESET_VECTOR if !EFI_STUB
select INTEL_BAYTRAIL
select BOARD_ROMSIZE_KB_8192
+ select BOARD_LATE_INIT
config PCIE_ECAM_BASE
default 0xe0000000
diff --git a/board/dfi/dfi-bt700/dfi-bt700.c b/board/dfi/dfi-bt700/dfi-bt700.c
index 8645bdc..3dd2036 100644
--- a/board/dfi/dfi-bt700/dfi-bt700.c
+++ b/board/dfi/dfi-bt700/dfi-bt700.c
@@ -28,3 +28,30 @@
return 0;
}
+
+int board_late_init(void)
+{
+ struct gpio_desc desc;
+ int ret;
+
+ ret = dm_gpio_lookup_name("F10", &desc);
+ if (ret)
+ debug("gpio ret=%d\n", ret);
+ ret = dm_gpio_request(&desc, "xhci_hub_reset");
+ if (ret)
+ debug("gpio_request ret=%d\n", ret);
+ ret = dm_gpio_set_dir_flags(&desc, GPIOD_IS_OUT);
+ if (ret)
+ debug("gpio dir ret=%d\n", ret);
+
+ /* Pull xHCI hub reset to low (active low) */
+ dm_gpio_set_value(&desc, 0);
+
+ /* Wait at least 5 ms, so lets choose 10 to be safe */
+ mdelay(10);
+
+ /* Pull xHCI hub reset to high (active low) */
+ dm_gpio_set_value(&desc, 1);
+
+ return 0;
+}