Changeset 1b90e90 in mainline

Timestamp:

2012-03-05T20:51:42Z (13 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

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

Children:

81716eb

Parents:

45f4f19

Message:

ohci: Improve HCCA structure handling. Add comments.

Fix minor root hub bug.

Location:

uspace/drv/bus/usb/ohci

Files:

• hc.c (modified) (1 diff)
• hw_struct/hcca.h (modified) (1 diff)
• root_hub.c (modified) (1 diff)

uspace/drv/bus/usb/ohci/hc.c

@@ -592 +592 @@
         if (instance->hcca == NULL)
                 return ENOMEM;
-        bzero(instance->hcca, sizeof(hcca_t));
         usb_log_debug2("OHCI HCCA initialized at %p.\n", instance->hcca);
 
-        for (unsigned i = 0; i < 32; ++i) {
-                OHCI_WR(instance->hcca->int_ep[i],
+        for (unsigned i = 0; i < HCCA_INT_EP_COUNT; ++i) {
+                hcca_set_int_ep(instance->hcca, i,
                     instance->lists[USB_TRANSFER_INTERRUPT].list_head_pa);
         }

uspace/drv/bus/usb/ohci/hw_struct/hcca.h

@@ -38 +38 @@
 #include <malloc.h>
 
+#include "mem_access.h"
+
+#define HCCA_INT_EP_COUNT  32
+
 /** Host controller communication area.
  * Shared memory used for communication between the controller and the driver.
  */
 typedef struct hcca {
-        uint32_t int_ep[32];
+        /** Interrupt endpoints */
+        uint32_t int_ep[HCCA_INT_EP_COUNT];
+        /** Frame number. */
         uint16_t frame_number;
         uint16_t pad1;
+        /** Pointer to the last completed TD. (useless) */
         uint32_t done_head;
+        /** Padding to make the size 256B */
         uint32_t reserved[29];
 } __attribute__((packed, aligned)) hcca_t;
 
-static inline void * hcca_get(void)
+/** Allocate properly aligned structure.
+ *
+ * The returned structure is zeroed upon allocation.
+ *
+ * @return Usable HCCA memory structure.
+ */
+static inline hcca_t * hcca_get(void)
 {
         assert(sizeof(hcca_t) == 256);
-        return memalign(256, sizeof(hcca_t));
+        hcca_t *hcca = memalign(256, sizeof(hcca_t));
+        if (hcca)
+                bzero(hcca, sizeof(hcca_t));
+        return hcca;
+}
+
+/** Set HCCA interrupt endpoint pointer table entry.
+ * @param hcca HCCA memory structure.
+ * @param index table index.
+ * @param pa Physical address.
+ */
+static inline void hcca_set_int_ep(hcca_t *hcca, unsigned index, uintptr_t pa)
+{
+        assert(hcca);
+        assert(index < HCCA_INT_EP_COUNT);
+        OHCI_MEM32_WR(hcca->int_ep[index], pa);
+
 }
 #endif

uspace/drv/bus/usb/ohci/root_hub.c

@@ -434 +434 @@
                         /* Register format matches the format of port status
                          * field */
-                        const uint32_t data = uint32_usb2host(OHCI_RD(
+                        const uint32_t data = uint32_host2usb(OHCI_RD(
                             instance->registers->rh_port_status[port - 1]));
                         TRANSFER_END_DATA(request, &data, sizeof(data));