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 54efe5ef00e75a998c006b55c1e5dbb8866b19a9..61cd16840a98b65c0d374ef8d4b84fd44c2bdb57 100644 (file)
--- a/drivers/usb/host/ehci-fsl.c
+++ b/drivers/usb/host/ehci-fsl.c
@@ -211,10 +211,57 @@ static int fdt_fixup_usb_mode_phy_type(void *blob, const char *mode,
        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 @@ void fdt_fixup_dr_usb(void *blob, bd_t *bd)
 
                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