Changeset a752c78c in mainline

Timestamp:

2014-01-25T07:07:54Z (11 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

23e5471

Parents:

6602e97

Message:

ehci: Implement batch error checking

Location:

uspace/drv/bus/usb/ehci

Files:

• ehci_batch.c (modified) (2 diffs)
• hw_struct/queue_head.h (modified) (1 diff)
• hw_struct/transfer_descriptor.c (modified) (2 diffs)
• hw_struct/transfer_descriptor.h (modified) (1 diff)

uspace/drv/bus/usb/ehci/ehci_batch.c

@@ -206 +206 @@
                     ehci_batch->tds[i]->status, ehci_batch->tds[i]->next,
                     ehci_batch->tds[i]->alternate);
-#if 0
+
                 ehci_batch->usb_batch->error = td_error(ehci_batch->tds[i]);
                 if (ehci_batch->usb_batch->error == EOK) {
@@ -227 +227 @@
                             ehci_batch->usb_batch, i,
                             ehci_batch->tds[i]->status);
-
-                        /* ED should be stopped because of errors */
-                        assert((ehci_batch->ed->td_head & ED_TDHEAD_HALTED_FLAG) != 0);
-
-                        /* Now we have a problem: we don't know what TD
-                         * the head pointer points to, the retiring rules
-                         * described in specs say it should be the one after
-                         * the failed one so set the tail pointer accordingly.
-                         * It will be the one TD we leave behind.
-                         */
-                        leave_td = i + 1;
-
-                        /* Check TD assumption */
-                        assert(ed_head_td(ehci_batch->ed) ==
-                            addr_to_phys(ehci_batch->tds[leave_td]));
-
-                        /* Set tail to the same TD */
-                        ed_set_tail_td(ehci_batch->ed,
-                            ehci_batch->tds[leave_td]);
-
                         /* Clear possible ED HALT */
-                        ed_clear_halt(ehci_batch->ed);
+                        qh_clear_halt(ehci_batch->qh);
                         break;
                 }
-#endif
         }
 
         assert(ehci_batch->usb_batch->transfered_size <=
             ehci_batch->usb_batch->buffer_size);
-#if 0
-        /* Store the remaining TD */
-        ehci_endpoint_t *ehci_ep = ehci_endpoint_get(ehci_batch->usb_batch->ep);
-        assert(ehci_ep);
-        ehci_ep->td = ehci_batch->tds[leave_td];
-
-        /* Make sure that we are leaving the right TD behind */
-        assert(addr_to_phys(ehci_ep->td) == ed_head_td(ehci_batch->ed));
-        assert(addr_to_phys(ehci_ep->td) == ed_tail_td(ehci_batch->ed));
-#endif
+        /* Clear TD pointers */
+        ehci_batch->qh->next = LINK_POINTER_TERM;
+        ehci_batch->qh->current = LINK_POINTER_TERM;
+
         return true;
 }

uspace/drv/bus/usb/ehci/hw_struct/queue_head.h

@@ -184 +184 @@
 }
 
-static inline void qh_halt(qh_t *qh)
-{
-        assert(qh);
-        EHCI_MEM32_SET(qh->status, QH_STATUS_HALTED_FLAG);
+static inline void qh_clear_halt(qh_t *qh)
+{
+        assert(qh);
+        EHCI_MEM32_CLR(qh->status, QH_STATUS_HALTED_FLAG);
 }
 

uspace/drv/bus/usb/ehci/hw_struct/transfer_descriptor.c

@@ -34 +34 @@
 
 #include <assert.h>
+#include <errno.h>
 #include <macros.h>
 #include <mem.h>
@@ -40 +41 @@
 
 #include "../utils/malloc32.h"
-//#include "completion_codes.h"
 #include "mem_access.h"
 #include "transfer_descriptor.h"
+
+
+int td_error(const td_t *td)
+{
+        assert(td);
+        const uint32_t status = EHCI_MEM32_RD(td->status);
+        if (status & TD_STATUS_HALTED_FLAG) {
+                if (status & TD_STATUS_TRANS_ERR_FLAG)
+                        return EIO;
+                if (status & TD_STATUS_BABBLE_FLAG)
+                        return EIO;
+                if (status & TD_STATUS_BUFF_ERROR_FLAG)
+                        return EOVERFLOW;
+                return ESTALL;
+        }
+        if (status & TD_STATUS_ACTIVE_FLAG)
+                return EINPROGRESS;
+        return EOK;
+}
 
 /** USB direction to EHCI TD values translation table */

uspace/drv/bus/usb/ehci/hw_struct/transfer_descriptor.h

@@ -73 +73 @@
 } td_t;
 
+static inline bool td_active(const td_t *td)
+{
+        assert(td);
+        return (EHCI_MEM32_RD(td->status) & TD_STATUS_HALTED_FLAG) != 0;
+}
+
+static inline size_t td_remain_size(const td_t *td)
+{
+        assert(td);
+        return (EHCI_MEM32_RD(td->status) >> TD_STATUS_TOTAL_SHIFT) &
+            TD_STATUS_TOTAL_MASK;
+}
+
+int td_error(const td_t *td);
+
 void td_init(td_t *td, const td_t *next, usb_direction_t dir, const void * buf,
     size_t buf_size, int toggle);