fsl/usb: Workaround for USB erratum-A005275
Workaround makes FS as default mode on all affected socs.
Add support to check erratum-A005275 validity for an soc. This info is
required to determine whether a given soc is affected by this erratum.
Add quirk for this erratum "has_fsl_erratum_a005275" . This quirk is used
to enable workaround for the errata
Force FS mode as default by:
- making EPS as FS
- setting PFSC bit to disable HS chirping
This workaround can be disabled by mentioning "no_erratum_a005275" in
hwconfig string
Signed-off-by: Chris Packham <judge.packham@gmail.com>
Reviewed-by: York Sun <york.sun@nxp.com>
diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c
index a04f6a3..a8fb2b8 100644
--- a/drivers/usb/host/ehci-fsl.c
+++ b/drivers/usb/host/ehci-fsl.c
@@ -93,6 +93,7 @@
struct usb_ehci *ehci = NULL;
struct ehci_hccr *hccr;
struct ehci_hcor *hcor;
+ struct ehci_ctrl *ehci_ctrl = &priv->ehci;
/*
* Get the base address for EHCI controller from the device node
@@ -107,6 +108,8 @@
hcor = (struct ehci_hcor *)
((void *)hccr + HC_LENGTH(ehci_readl(&hccr->cr_capbase)));
+ ehci_ctrl->has_fsl_erratum_a005275 = has_erratum_a005275();
+
if (ehci_fsl_init(priv, ehci, hccr, hcor) < 0)
return -ENXIO;
@@ -145,6 +148,8 @@
int ehci_hcd_init(int index, enum usb_init_type init,
struct ehci_hccr **hccr, struct ehci_hcor **hcor)
{
+ struct ehci_ctrl *ehci_ctrl = container_of(hccr,
+ struct ehci_ctrl, hccr);
struct usb_ehci *ehci = NULL;
switch (index) {
@@ -163,6 +168,8 @@
*hcor = (struct ehci_hcor *)((uint32_t) *hccr +
HC_LENGTH(ehci_readl(&(*hccr)->cr_capbase)));
+ ehci_ctrl->has_fsl_erratum_a005275 = has_erratum_a005275();
+
return ehci_fsl_init(index, ehci, *hccr, *hcor);
}