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x86: dfi-bt700: Add xHCI USB support

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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>
This commit is contained in:
Stefan Roese 2017-07-18 14:10:49 +02:00 committed by Bin Meng
parent db1d20a904
commit 1f4e25780a
3 changed files with 40 additions and 0 deletions
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12
arch/x86/dts/dfi-bt700.dtsi
View File

@ -47,6 +47,15 @@
pad-offset = <0x3a0>;
mode-func = <1>;
};
xhci_hub_reset: usb_ulpi_stp@0 {
gpio-offset = <0xa0 10>;
pad-offset = <0x23b0>;
mode-func = <0>;
mode-gpio;
output-value = <1>;
direction = <PIN_OUTPUT>;
};
};
chosen {
@ -261,6 +270,9 @@
fsp,enable-spi;
fsp,enable-sata;
fsp,sata-mode = <SATA_MODE_AHCI>;
#ifdef CONFIG_USB_XHCI_HCD
fsp,enable-xhci;
#endif
fsp,lpe-mode = <LPE_MODE_PCI>;
fsp,lpss-sio-mode = <LPSS_SIO_MODE_PCI>;
fsp,enable-dma0;

1
board/dfi/dfi-bt700/Kconfig
View File

@ -21,6 +21,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy
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

27
board/dfi/dfi-bt700/dfi-bt700.c
View File

@ -28,3 +28,30 @@ int board_early_init_f(void)
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;
}