USB: UHCI: Add support for big endian descriptors

This patch adds support for universal host controllers that use
big endian descriptors. Support for BE descriptors requires a non-PCI
host controller. For kernels with PCI-only UHCI there should be no
change in behaviour.

This patch tries to replicate the technique used to support BE descriptors
in the EHCI HCD. Parts added to uhci-hcd.h are basically copy'n'paste from
ehci.h.

Signed-off-by: Jan Andersson <jan@gaisler.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 39 insertions, 32 deletions

diff --git a/drivers/usb/host/uhci-debug.c b/drivers/usb/host/uhci-debug.c
index f882a84b1bbb..fc0b0daac93d 100644
--- a/drivers/usb/host/uhci-debug.c
+++ b/drivers/usb/host/uhci-debug.c
@@ -37,7 +37,8 @@ static void lprintk(char *buf)
         }
 }
 
-static int uhci_show_td(struct uhci_td *td, char *buf, int len, int space)
+static int uhci_show_td(struct uhci_hcd *uhci, struct uhci_td *td, char *buf,
+                        int len, int space)
 {
         char *out = buf;
         char *spid;
@@ -47,8 +48,9 @@ static int uhci_show_td(struct uhci_td *td, char *buf, int len, int space)
         if (len < 160)
                 return 0;
 
-        status = td_status(td);
-        out += sprintf(out, "%*s[%p] link (%08x) ", space, "", td, le32_to_cpu(td->link));
+        status = td_status(uhci, td);
+        out += sprintf(out, "%*s[%p] link (%08x) ", space, "", td,
+                hc32_to_cpu(uhci, td->link));
         out += sprintf(out, "e%d %s%s%s%s%s%s%s%s%s%sLength=%x ",
                 ((status >> 27) & 3),
                 (status & TD_CTRL_SPD) ?      "SPD " : "",
@@ -63,7 +65,7 @@ static int uhci_show_td(struct uhci_td *td, char *buf, int len, int space)
                 (status & TD_CTRL_BITSTUFF) ? "BitStuff " : "",
                 status & 0x7ff);
 
-        token = td_token(td);
+        token = td_token(uhci, td);
         switch (uhci_packetid(token)) {
                 case USB_PID_SETUP:
                         spid = "SETUP";
@@ -86,12 +88,13 @@ static int uhci_show_td(struct uhci_td *td, char *buf, int len, int space)
                 (token >> 8) & 127,
                 (token & 0xff),
                 spid);
-        out += sprintf(out, "(buf=%08x)\n", le32_to_cpu(td->buffer));
+        out += sprintf(out, "(buf=%08x)\n", hc32_to_cpu(uhci, td->buffer));
 
         return out - buf;
 }
 
-static int uhci_show_urbp(struct urb_priv *urbp, char *buf, int len, int space)
+static int uhci_show_urbp(struct uhci_hcd *uhci, struct urb_priv *urbp,
+                        char *buf, int len, int space)
 {
         char *out = buf;
         struct uhci_td *td;
@@ -130,9 +133,10 @@ static int uhci_show_urbp(struct urb_priv *urbp, char *buf, int len, int space)
                 if (urbp->qh->type != USB_ENDPOINT_XFER_ISOC &&
                                 (++i <= 10 || debug > 2)) {
                         out += sprintf(out, "%*s%d: ", space + 2, "", i);
-                        out += uhci_show_td(td, out, len - (out - buf), 0);
+                        out += uhci_show_td(uhci, td, out,
+                                        len - (out - buf), 0);
                 } else {
-                        if (td_status(td) & TD_CTRL_ACTIVE)
+                        if (td_status(uhci, td) & TD_CTRL_ACTIVE)
                                 ++nactive;
                         else
                                 ++ninactive;
@@ -151,7 +155,7 @@ static int uhci_show_qh(struct uhci_hcd *uhci,
 {
         char *out = buf;
         int i, nurbs;
-        __le32 element = qh_element(qh);
+        __hc32 element = qh_element(qh);
         char *qtype;
 
         /* Try to make sure there's enough memory */
@@ -168,7 +172,8 @@ static int uhci_show_qh(struct uhci_hcd *uhci,
 
         out += sprintf(out, "%*s[%p] %s QH link (%08x) element (%08x)\n",
                         space, "", qh, qtype,
-                        le32_to_cpu(qh->link), le32_to_cpu(element));
+                        hc32_to_cpu(uhci, qh->link),
+                        hc32_to_cpu(uhci, element));
         if (qh->type == USB_ENDPOINT_XFER_ISOC)
                 out += sprintf(out, "%*s    period %d phase %d load %d us, "
                                 "frame %x desc [%p]\n",
@@ -178,22 +183,22 @@ static int uhci_show_qh(struct uhci_hcd *uhci,
                 out += sprintf(out, "%*s    period %d phase %d load %d us\n",
                                 space, "", qh->period, qh->phase, qh->load);
 
-        if (element & UHCI_PTR_QH)
+        if (element & UHCI_PTR_QH(uhci))
                 out += sprintf(out, "%*s  Element points to QH (bug?)\n", space, "");
 
-        if (element & UHCI_PTR_DEPTH)
+        if (element & UHCI_PTR_DEPTH(uhci))
                 out += sprintf(out, "%*s  Depth traverse\n", space, "");
 
-        if (element & cpu_to_le32(8))
+        if (element & cpu_to_hc32(uhci, 8))
                 out += sprintf(out, "%*s  Bit 3 set (bug?)\n", space, "");
 
-        if (!(element & ~(UHCI_PTR_QH | UHCI_PTR_DEPTH)))
+        if (!(element & ~(UHCI_PTR_QH(uhci) | UHCI_PTR_DEPTH(uhci))))
                 out += sprintf(out, "%*s  Element is NULL (bug?)\n", space, "");
 
         if (list_empty(&qh->queue)) {
                 out += sprintf(out, "%*s  queue is empty\n", space, "");
                 if (qh == uhci->skel_async_qh)
-                        out += uhci_show_td(uhci->term_td, out,
+                        out += uhci_show_td(uhci, uhci->term_td, out,
                                         len - (out - buf), 0);
         } else {
                 struct urb_priv *urbp = list_entry(qh->queue.next,
@@ -201,13 +206,13 @@ static int uhci_show_qh(struct uhci_hcd *uhci,
                 struct uhci_td *td = list_entry(urbp->td_list.next,
                                 struct uhci_td, list);
 
-                if (element != LINK_TO_TD(td))
+                if (element != LINK_TO_TD(uhci, td))
                         out += sprintf(out, "%*s Element != First TD\n",
                                         space, "");
                 i = nurbs = 0;
                 list_for_each_entry(urbp, &qh->queue, node) {
                         if (++i <= 10)
-                                out += uhci_show_urbp(urbp, out,
+                                out += uhci_show_urbp(uhci, urbp, out,
                                                 len - (out - buf), space + 2);
                         else
                                 ++nurbs;
@@ -219,7 +224,8 @@ static int uhci_show_qh(struct uhci_hcd *uhci,
 
         if (qh->dummy_td) {
                 out += sprintf(out, "%*s  Dummy TD\n", space, "");
-                out += uhci_show_td(qh->dummy_td, out, len - (out - buf), 0);
+                out += uhci_show_td(uhci, qh->dummy_td, out,
+                                len - (out - buf), 0);
         }
 
         return out - buf;
@@ -346,8 +352,8 @@ static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
         struct uhci_td *td;
         struct list_head *tmp, *head;
         int nframes, nerrs;
-        __le32 link;
-        __le32 fsbr_link;
+        __hc32 link;
+        __hc32 fsbr_link;
 
         static const char * const qh_names[] = {
                 "unlink", "iso", "int128", "int64", "int32", "int16",
@@ -375,7 +381,7 @@ static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
         nframes = 10;
         nerrs = 0;
         for (i = 0; i < UHCI_NUMFRAMES; ++i) {
-                __le32 qh_dma;
+                __hc32 qh_dma;
 
                 j = 0;
                 td = uhci->frame_cpu[i];
@@ -385,7 +391,7 @@ static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
 
                 if (nframes > 0) {
                         out += sprintf(out, "- Frame %d -> (%08x)\n",
-                                        i, le32_to_cpu(link));
+                                        i, hc32_to_cpu(uhci, link));
                         j = 1;
                 }
 
@@ -394,7 +400,7 @@ static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
                 do {
                         td = list_entry(tmp, struct uhci_td, fl_list);
                         tmp = tmp->next;
-                        if (link != LINK_TO_TD(td)) {
+                        if (link != LINK_TO_TD(uhci, td)) {
                                 if (nframes > 0)
                                         out += sprintf(out, "    link does "
                                                 "not match list entry!\n");
@@ -402,7 +408,7 @@ static int uhci_sprint_schedule(struct uhci_hcd *uhci, char *buf, int len)
                                         ++nerrs;
                         }
                         if (nframes > 0)
-                                out += uhci_show_td(td, out,
+                                out += uhci_show_td(uhci, td, out,
                                                 len - (out - buf), 4);
                         link = td->link;
                 } while (tmp != head);
@@ -414,11 +420,12 @@ check_link:
                                 if (!j) {
                                         out += sprintf(out,
                                                 "- Frame %d -> (%08x)\n",
-                                                i, le32_to_cpu(link));
+                                                i, hc32_to_cpu(uhci, link));
                                         j = 1;
                                 }
                                 out += sprintf(out, "   link does not match "
-                                        "QH (%08x)!\n", le32_to_cpu(qh_dma));
+                                        "QH (%08x)!\n",
+                                        hc32_to_cpu(uhci, qh_dma));
                         } else
                                 ++nerrs;
                 }
@@ -439,11 +446,11 @@ check_link:
 
                 /* Last QH is the Terminating QH, it's different */
                 if (i == SKEL_TERM) {
-                        if (qh_element(qh) != LINK_TO_TD(uhci->term_td))
+                        if (qh_element(qh) != LINK_TO_TD(uhci, uhci->term_td))
                                 out += sprintf(out, "    skel_term_qh element is not set to term_td!\n");
                         link = fsbr_link;
                         if (!link)
-                                link = LINK_TO_QH(uhci->skel_term_qh);
+                                link = LINK_TO_QH(uhci, uhci->skel_term_qh);
                         goto check_qh_link;
                 }
 
@@ -457,20 +464,20 @@ check_link:
                                 out += uhci_show_qh(uhci, qh, out,
                                                 len - (out - buf), 4);
                         if (!fsbr_link && qh->skel >= SKEL_FSBR)
-                                fsbr_link = LINK_TO_QH(qh);
+                                fsbr_link = LINK_TO_QH(uhci, qh);
                 }
                 if ((cnt -= 10) > 0)
                         out += sprintf(out, "    Skipped %d QHs\n", cnt);
 
-                link = UHCI_PTR_TERM;
+                link = UHCI_PTR_TERM(uhci);
                 if (i <= SKEL_ISO)
                         ;
                 else if (i < SKEL_ASYNC)
-                        link = LINK_TO_QH(uhci->skel_async_qh);
+                        link = LINK_TO_QH(uhci, uhci->skel_async_qh);
                 else if (!uhci->fsbr_is_on)
                         ;
                 else
-                        link = LINK_TO_QH(uhci->skel_term_qh);
+                        link = LINK_TO_QH(uhci, uhci->skel_term_qh);
 check_qh_link:
                 if (qh->link != link)
                         out += sprintf(out, "    last QH not linked to next skeleton!\n");