drivers: usb: fsl: Add USB device-tree errata framework
Add a new framework for fsl usb erratum handling to standardize
erratum checking only inside Uboot. Information to kernel is passed
via a boolean property corresponding to erratum, hence eliminating
need for code duplication inside kernel
Signed-off-by: Ramneek Mehresh <ramneek.mehresh@freescale.com>
Signed-off-by: Nikhil Badola <nikhil.badola@freescale.com>
Reviewed-by: York Sun <yorksun@freescale.com>
diff --git a/drivers/usb/host/ehci-fsl.c b/drivers/usb/host/ehci-fsl.c
index 54efe5e..61cd168 100644
--- a/drivers/usb/host/ehci-fsl.c
+++ b/drivers/usb/host/ehci-fsl.c
@@ -211,10 +211,57 @@
return node_offset;
}
+static const char *fdt_usb_get_node_type(void *blob, int start_offset,
+ int *node_offset)
+{
+ const char *compat_dr = "fsl-usb2-dr";
+ const char *compat_mph = "fsl-usb2-mph";
+ const char *node_type = NULL;
+
+ *node_offset = fdt_node_offset_by_compatible(blob, start_offset,
+ compat_mph);
+ if (*node_offset < 0) {
+ *node_offset = fdt_node_offset_by_compatible(blob,
+ start_offset,
+ compat_dr);
+ if (*node_offset < 0) {
+ printf("ERROR: could not find compatible node: %s\n",
+ fdt_strerror(*node_offset));
+ } else {
+ node_type = compat_dr;
+ }
+ } else {
+ node_type = compat_mph;
+ }
+
+ return node_type;
+}
+
+static int fdt_fixup_usb_erratum(void *blob, const char *prop_erratum,
+ int start_offset)
+{
+ int node_offset, err;
+ const char *node_type = NULL;
+
+ node_type = fdt_usb_get_node_type(blob, start_offset, &node_offset);
+ if (!node_type)
+ return -1;
+
+ err = fdt_setprop(blob, node_offset, prop_erratum, NULL, 0);
+ if (err < 0) {
+ printf("ERROR: could not set %s for %s: %s.\n",
+ prop_erratum, node_type, fdt_strerror(err));
+ }
+
+ return node_offset;
+}
+
void fdt_fixup_dr_usb(void *blob, bd_t *bd)
{
static const char * const modes[] = { "host", "peripheral", "otg" };
static const char * const phys[] = { "ulpi", "utmi" };
+ int usb_erratum_a006261_off = -1;
+ int usb_erratum_a007075_off = -1;
int usb_mode_off = -1;
int usb_phy_off = -1;
char str[5];
@@ -268,6 +315,23 @@
if (usb_phy_off < 0)
return;
+
+ if (has_erratum_a006261()) {
+ usb_erratum_a006261_off = fdt_fixup_usb_erratum
+ (blob,
+ "fsl,usb-erratum-a006261",
+ usb_erratum_a006261_off);
+ if (usb_erratum_a006261_off < 0)
+ return;
+ }
+ if (has_erratum_a007075()) {
+ usb_erratum_a007075_off = fdt_fixup_usb_erratum
+ (blob,
+ "fsl,usb-erratum-a007075",
+ usb_erratum_a007075_off);
+ if (usb_erratum_a007075_off < 0)
+ return;
+ }
}
}
#endif