Changeset a1769ee in mainline for uspace/lib/libdrv/generic/driver.c

Timestamp:

2010-03-31T20:30:54Z (15 years ago)

Author:

Lenka Trochtova <trochtova.lenka@…>

Branches:

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

Children:

52b7b1bb

Parents:

eff1a590

Message:

device interfaces - parts of code

File:

• uspace/lib/libdrv/generic/driver.c (modified) (4 diffs)

uspace/lib/libdrv/generic/driver.c

@@ -58 +58 @@
 LIST_INITIALIZE(devices);
 
-static device_t* driver_create_device()
+static device_t * driver_create_device()
 {
         device_t *dev = (device_t *)malloc(sizeof(device_t));
@@ -65 +65 @@
         }       
         return dev;     
+}
+
+static device_t * driver_get_device(link_t *devices, device_handle_t handle) 
+{       
+        device_t *dev = NULL;
+        link_t *link = devices->next;
+        
+        while (link != devices) {
+                dev = list_get_instance(link, device_t, link);
+                if (handle == dev->handle) {
+                        return dev;
+                }
+        }
+        
+        return NULL;
 }
 
@@ -82 +97 @@
         printf("%s: new device with handle = %x was added.\n", driver->name, dev_handle);
         
-        ipcarg_t r = ipc_answer_1(iid, EOK, ret);
+        ipc_answer_1(iid, EOK, ret);
 }
 
@@ -111 +126 @@
 }
 
+/** 
+ * Generic client connection handler both for applications and drivers.
+ * 
+ * @param driver true for driver client, false for other clients (applications, services etc.). 
+ */
+static void driver_connection_gen(ipc_callid_t iid, ipc_call_t *icall, bool driver) {
+        /*
+         * Answer the first IPC_M_CONNECT_ME_TO call and remember the handle of the device to which the client connected.
+         */
+        device_handle_t handle = IPC_GET_ARG1(*icall); 
+        device_t *dev = driver_get_device(&devices, handle);
+        
+        if (dev == NULL) {
+                ipc_answer_0(iid, ENOENT);
+                return;
+        }
+        
+        // TODO introduce generic device interface for opening and closing devices
+        // and call its open callback here to find out wheter the device can be used by the connecting client
+                
+
+        ipc_answer_0(iid, EOK);
+        
+        while (1) {
+                ipc_callid_t callid;
+                ipc_call_t call;
+        
+                callid = async_get_call(&call);
+                ipcarg_t method = IPC_GET_METHOD(call);
+                switch  (method) {
+                case IPC_M_PHONE_HUNGUP:
+                        // TODO close the device 
+                        ipc_answer_0(callid, EOK);
+                        return;
+                default:
+                        if (DEV_IFACE_FIRST <= method && method < DEV_IFACE_MAX) {
+                                // TODO - try to find interface, if supported
+                                // otherwise return  ENOTSUP                            
+                        } else {
+                                ipc_answer_0(callid, ENOTSUP);
+                        }
+                        break;
+                }
+        }
+}
+
 static void driver_connection_driver(ipc_callid_t iid, ipc_call_t *icall)
 {
-        // TODO later
+        driver_connection_gen(iid, icall, true); 
 }
 
 static void driver_connection_client(ipc_callid_t iid, ipc_call_t *icall)
 {
-        // TODO later
+        driver_connection_gen(iid, icall, false); 
 }