Changeset 5debe97 in mainline for uspace/lib/usb/src/dev.c

Timestamp:

2013-01-27T16:24:25Z (11 years ago)

Author:

Jan Vesely <jano.vesely@…>

Branches:

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

Children:

fe9d542

Parents:

2745176

Message:

libusb: DCE

File:

• uspace/lib/usb/src/dev.c (modified) (8 diffs)

uspace/lib/usb/src/dev.c

@@ -36 +36 @@
 
 #define MAX_DEVICE_PATH 1024
-
-/** Find host controller handle, address and iface number for the device.
- *
- * @param[in] device_handle Device devman handle.
- * @param[out] hc_handle Where to store handle of host controller
- *      controlling device with @p device_handle handle.
- * @param[out] address Place to store the device's address
- * @param[out] iface Place to stoer the assigned USB interface number.
- * @return Error code.
- */
-static int usb_get_info_by_handle(devman_handle_t device_handle,
-    devman_handle_t *hc_handle, usb_address_t *address, int *iface)
-{
-        async_sess_t *parent_sess =
-            devman_parent_device_connect(EXCHANGE_ATOMIC, device_handle,
-                IPC_FLAG_BLOCKING);
-        if (!parent_sess)
-                return ENOMEM;
-
-        async_exch_t *exch = async_exchange_begin(parent_sess);
-        if (!exch) {
-                async_hangup(parent_sess);
-                return ENOMEM;
-        }
-
-        usb_address_t tmp_address;
-        devman_handle_t tmp_handle;
-        int tmp_iface;
-
-        if (address) {
-                const int ret = usb_get_my_address(exch, &tmp_address);
-                if (ret != EOK) {
-                        async_exchange_end(exch);
-                        async_hangup(parent_sess);
-                        return ret;
-                }
-        }
-
-        if (hc_handle) {
-                const int ret = usb_get_hc_handle(exch, &tmp_handle);
-                if (ret != EOK) {
-                        async_exchange_end(exch);
-                        async_hangup(parent_sess);
-                        return ret;
-                }
-        }
-
-        if (iface) {
-                const int ret = usb_get_my_interface(exch, &tmp_iface);
-                switch (ret) {
-                case ENOTSUP:
-                        /* Implementing GET_MY_INTERFACE is voluntary. */
-                        tmp_iface = -1;
-                case EOK:
-                        break;
-                default:
-                        async_exchange_end(exch);
-                        async_hangup(parent_sess);
-                        return ret;
-                }
-        }
-
-        if (hc_handle)
-                *hc_handle = tmp_handle;
-
-        if (address)
-                *address = tmp_address;
-
-        if (iface)
-                *iface = tmp_iface;
-
-        async_exchange_end(exch);
-        async_hangup(parent_sess);
-
-        return EOK;
-}
-
-static inline int usb_get_hc_by_handle(devman_handle_t dev, devman_handle_t *hc)
-{
-        return usb_get_info_by_handle(dev, hc, NULL, NULL);
-}
-
-static inline int usb_get_address_by_handle(
-    devman_handle_t dev, usb_address_t *address)
-{
-        return usb_get_info_by_handle(dev, NULL, address, NULL);
-}
 
 static bool try_parse_bus_and_address(const char *path,
@@ -186 +99 @@
  * @return Error code.
  */
-int usb_resolve_device_handle(const char *dev_path, devman_handle_t *out_hc_handle,
-    usb_address_t *out_dev_addr, devman_handle_t *out_dev_handle)
+int usb_resolve_device_handle(const char *dev_path, devman_handle_t *dev_handle)
 {
-        if (dev_path == NULL) {
+        if (dev_path == NULL || dev_handle == NULL) {
                 return EBADMEM;
         }
 
-        bool found_hc = false;
-        bool found_addr = false;
-        devman_handle_t hc_handle, dev_handle;
-        usb_address_t dev_addr = -1;
+        devman_handle_t hc;
+        usb_address_t addr = -1;
         int rc;
-        bool is_bus_addr;
         char *func_start = NULL;
         char *path = NULL;
 
         /* First try the BUS.ADDR format. */
-        is_bus_addr = try_parse_bus_and_address(dev_path, &func_start,
-            &hc_handle, &dev_addr);
-        if (is_bus_addr) {
-                found_hc = true;
-                found_addr = true;
+        if (try_parse_bus_and_address(dev_path, &func_start, &hc, &addr)) {
                 /*
                  * Now get the handle of the device. We will need that
@@ -219 +124 @@
                  * Otherwise, we will
                  */
-                rc = get_device_handle_by_address(hc_handle, dev_addr,
-                    &dev_handle);
+
+                rc = get_device_handle_by_address(hc, addr, dev_handle);
                 if (rc != EOK) {
                         return rc;
@@ -226 +131 @@
                 if (str_length(func_start) > 0) {
                         char tmp_path[MAX_DEVICE_PATH];
-                        rc = devman_fun_get_path(dev_handle,
+                        rc = devman_fun_get_path(*dev_handle,
                             tmp_path, MAX_DEVICE_PATH);
                         if (rc != EOK) {
@@ -237 +142 @@
                 } else {
                         /* Everything is resolved. Get out of here. */
-                        goto copy_out;
+                        return EOK;
                 }
         } else {
@@ -247 +152 @@
 
         /* First try to get the device handle. */
-        rc = devman_fun_get_handle(path, &dev_handle, 0);
+        rc = devman_fun_get_handle(path, dev_handle, 0);
         if (rc != EOK) {
                 free(path);
@@ -264 +169 @@
                 }
 
-                /* Try to find its host controller. */
-                if (!found_hc) {
-                        rc = usb_get_hc_by_handle(tmp_handle, &hc_handle);
-                        if (rc == EOK) {
-                                found_hc = true;
-                        }
-                }
-
-                /* Try to get its address. */
-                if (!found_addr) {
-                        rc = usb_get_address_by_handle(tmp_handle, &dev_addr);
-                        if (rc == 0) {
-                                found_addr = true;
-                        }
-                }
-
-                /* Speed-up. */
-                if (found_hc && found_addr) {
-                        break;
-                }
-
                 /* Remove the last suffix. */
                 char *slash_pos = str_rchr(path, '/');
@@ -294 +178 @@
         free(path);
 
-        if (!found_addr || !found_hc) {
-                return ENOENT;
-        }
-
-copy_out:
-        if (out_dev_addr != NULL) {
-                *out_dev_addr = dev_addr;
-        }
-        if (out_hc_handle != NULL) {
-                *out_hc_handle = hc_handle;
-        }
-        if (out_dev_handle != NULL) {
-                *out_dev_handle = dev_handle;
-        }
 
         return EOK;