Changeset 4144630 in mainline for uspace/lib/usb/src/hcdhubd.c

Timestamp:

2010-12-03T15:43:43Z (14 years ago)

Author:

smekideki@…>

Branches:

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

Children:

2cb6571, 45e9cc6

Parents:

c39544a

Message:

usb adresses assigning

File:

• uspace/lib/usb/src/hcdhubd.c (modified) (5 diffs)

uspace/lib/usb/src/hcdhubd.c

@@ -105 +105 @@
  * @return Error code.
  */
-int usb_hcd_add_root_hub(usb_hc_device_t *dev)
-{
+int usb_hcd_add_root_hub(usb_hc_device_t *dev) {
         char *id;
         int rc = asprintf(&id, "usb&hc=%s&hub", dev->generic->name);
@@ -129 +128 @@
 
 /** Adds a child device fibril worker. */
-static int fibril_add_child_device(void *arg)
-{
+static int fibril_add_child_device(void *arg) {
         struct child_device_info *child_info
-            = (struct child_device_info *) arg;
+                        = (struct child_device_info *) arg;
         int rc;
 
@@ -154 +152 @@
 
         printf("%s: adding child device `%s' with match \"%s\"\n",
-            hc_driver->name, child->name, match_id->id);
+                        hc_driver->name, child->name, match_id->id);
         rc = child_device_register(child, child_info->parent);
         printf("%s: child device `%s' registration: %s\n",
-            hc_driver->name, child->name, str_error(rc));
+                        hc_driver->name, child->name, str_error(rc));
 
         if (rc != EOK) {
@@ -195 +193 @@
  */
 int usb_hc_add_child_device(device_t *parent, const char *name,
-    const char *match_id, bool create_fibril)
-{
+                const char *match_id, bool create_fibril) {
         printf("%s: about to add child device `%s' (%s)\n", hc_driver->name,
-            name, match_id);
+                        name, match_id);
 
         struct child_device_info *child_info
-            = malloc(sizeof(struct child_device_info));
+                        = malloc(sizeof (struct child_device_info));
 
         child_info->parent = parent;
@@ -225 +222 @@
  * @return USB device address or error code.
  */
-usb_address_t usb_get_address_by_handle(devman_handle_t handle)
-{
+usb_address_t usb_get_address_by_handle(devman_handle_t handle) {
         /* TODO: search list of attached devices. */
         return ENOENT;
 }
 
+usb_address_t usb_use_free_address(usb_hc_device_t * this_hcd) {
+        //is there free address?
+        link_t * addresses = &this_hcd->addresses;
+        if (list_empty(addresses)) return -1;
+        link_t * link_addr = addresses;
+        bool found = false;
+        usb_address_list_t * range = NULL;
+        while (!found) {
+                link_addr = link_addr->next;
+                if (link_addr == addresses) return -2;
+                range = list_get_instance(link_addr,
+                                usb_address_list_t, link);
+                if (range->upper_bound - range->lower_bound > 0) {
+                        found = true;
+                }
+        }
+        //now we have interval
+        int result = range->lower_bound;
+        ++(range->lower_bound);
+        if (range->upper_bound - range->lower_bound == 0) {
+                list_remove(&range->link);
+                free(range);
+        }
+        return result;
+}
+
+void usb_free_used_address(usb_hc_device_t * this_hcd, usb_address_t addr) {
+        //check range
+        if (addr < usb_lowest_address || addr > usb_highest_address)
+                return;
+        link_t * addresses = &this_hcd->addresses;
+        link_t * link_addr = addresses;
+        //find 'good' interval
+        usb_address_list_t * found_range = NULL;
+        bool found = false;
+        while (!found) {
+                link_addr = link_addr->next;
+                if (link_addr == addresses) {
+                        found = true;
+                } else {
+                        usb_address_list_t * range = list_get_instance(link_addr,
+                                        usb_address_list_t, link);
+                        if (    (range->lower_bound - 1 == addr) ||
+                                        (range->upper_bound == addr)) {
+                                found = true;
+                                found_range = range;
+                        }
+                        if (range->lower_bound - 1 > addr) {
+                                found = true;
+                        }
+
+                }
+        }
+        if (found_range == NULL) {
+                //no suitable range found
+                usb_address_list_t * result_range =
+                                (usb_address_list_t*) malloc(sizeof (usb_address_list_t));
+                result_range->lower_bound = addr;
+                result_range->upper_bound = addr + 1;
+                list_insert_before(&result_range->link, link_addr);
+        } else {
+                //we have good range
+                if (found_range->lower_bound - 1 == addr) {
+                        --found_range->lower_bound;
+                } else {
+                        //only one possible case
+                        ++found_range->upper_bound;
+                        if (found_range->link.next != addresses) {
+                                usb_address_list_t * next_range =
+                                                list_get_instance( &found_range->link.next,
+                                                usb_address_list_t, link);
+                                //check neighbour range
+                                if (next_range->lower_bound == addr + 1) {
+                                        //join ranges
+                                        found_range->upper_bound = next_range->upper_bound;
+                                        list_remove(&next_range->link);
+                                        free(next_range);
+                                }
+                        }
+                }
+        }
+
+}
+
 /**
  * @}