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>

1 files changed, 7 insertions, 0 deletions

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 @@ static int ehci_fsl_probe(struct udevice *dev)
 	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 @@ static int ehci_fsl_probe(struct udevice *dev)
 	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 @@ U_BOOT_DRIVER(ehci_fsl) = {
 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 @@ int ehci_hcd_init(int index, enum usb_init_type init,
 	*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);
 }