CONFIG_USB_EHCI_TXFIFO_THRESH enables setting of the txfilltuning field in the EHCI controller on reset.
Signed-off-by: Simon Glass sjg@chromium.org ---
README | 3 +++ drivers/usb/host/ehci-hcd.c | 7 +++++++ drivers/usb/host/ehci.h | 6 +++++- 3 files changed, 15 insertions(+), 1 deletions(-)
diff --git a/README b/README index 3194846..7df3aa1 100644 --- a/README +++ b/README @@ -1102,6 +1102,9 @@ The following options need to be configured: align data for us, we display a warning when the alignment code is triggered.
+ CONFIG_USB_EHCI_TXFIFO_THRESH enables setting of the + txfilltuning field in the EHCI controller on reset. + - USB Device: Define the below if you wish to use the USB console. Once firmware is rebuilt from a serial console issue the diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c index 23458b6..3040a6d 100644 --- a/drivers/usb/host/ehci-hcd.c +++ b/drivers/usb/host/ehci-hcd.c @@ -247,6 +247,13 @@ static int ehci_reset(void) #endif ehci_writel(reg_ptr, tmp); } + +#ifdef CONFIG_USB_EHCI_TXFIFO_THRESH + cmd = ehci_readl(&hcor->or_txfilltuning); + cmd &= ~TXFIFO_THRESH(0x3f); + cmd |= TXFIFO_THRESH(CONFIG_USB_EHCI_TXFIFO_THRESH); + ehci_writel(&hcor->or_txfilltuning, cmd); +#endif out: return ret; } diff --git a/drivers/usb/host/ehci.h b/drivers/usb/host/ehci.h index 3d0ad0c..cc00ce4 100644 --- a/drivers/usb/host/ehci.h +++ b/drivers/usb/host/ehci.h @@ -80,7 +80,11 @@ struct ehci_hcor { uint32_t or_ctrldssegment; uint32_t or_periodiclistbase; uint32_t or_asynclistaddr; - uint32_t _reserved_[9]; + uint32_t _reserved_0_; + uint32_t or_burstsize; + uint32_t or_txfilltuning; +#define TXFIFO_THRESH(p) ((p & 0x3f) << 16) + uint32_t _reserved_1_[6]; uint32_t or_configflag; #define FLAG_CF (1 << 0) /* true: we'll support "high speed" */ uint32_t or_portsc[CONFIG_SYS_USB_EHCI_MAX_ROOT_PORTS];