CONFIG_USB_EHCI_TXFIFO_THRESH enables setting of the txfilltuning
field in the EHCI controller on reset.
Signed-off-by: Simon Glass <s...@chromium.org>
Acked-by: Remy Bohmer <li...@bohmer.net>
---
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 9d713e8..7adf7c7 100644
--- a/README
+++ b/README
@@ -1135,6 +1135,9 @@ The following options need to be configured:
May be defined to allow interrupt polling
instead of using asynchronous interrupts
+ 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 3f7bc2c..d893b2a 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -259,6 +259,13 @@ 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];
--
1.7.7.3
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