adb_dev.c

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00001 /*
00002  * Copyright (c) 2010 Jiri Svoboda
00003  * All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions
00007  * are met:
00008  *
00009  * - Redistributions of source code must retain the above copyright
00010  *   notice, this list of conditions and the following disclaimer.
00011  * - Redistributions in binary form must reproduce the above copyright
00012  *   notice, this list of conditions and the following disclaimer in the
00013  *   documentation and/or other materials provided with the distribution.
00014  * - The name of the author may not be used to endorse or promote products
00015  *   derived from this software without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
00018  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
00019  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
00020  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
00021  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
00022  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
00023  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
00024  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
00025  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
00026  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00027  */
00028 
00036 #include <ipc/adb.h>
00037 #include <async.h>
00038 #include <vfs/vfs.h>
00039 #include <fcntl.h>
00040 #include <errno.h>
00041 
00042 #include "adb_mouse.h"
00043 #include "adb_dev.h"
00044 
00045 static void adb_dev_events(ipc_callid_t iid, ipc_call_t *icall);
00046 
00047 static int dev_phone;
00048 
00049 int adb_dev_init(void)
00050 {
00051         const char *input = "/dev/adb/mouse";
00052         int input_fd;
00053 
00054         printf(NAME ": open %s\n", input);
00055 
00056         input_fd = open(input, O_RDONLY);
00057         if (input_fd < 0) {
00058                 printf(NAME ": Failed opening %s (%d)\n", input, input_fd);
00059                 return false;
00060         }
00061 
00062         dev_phone = fd_phone(input_fd);
00063         if (dev_phone < 0) {
00064                 printf(NAME ": Failed to connect to device\n");
00065                 return false;
00066         }
00067 
00068         /* NB: The callback connection is slotted for removal */
00069         if (async_connect_to_me(dev_phone, 0, 0, 0, adb_dev_events) != 0) {
00070                 printf(NAME ": Failed to create callback from device\n");
00071                 return false;
00072         }
00073         
00074         return 0;
00075 }
00076 
00077 static void adb_dev_events(ipc_callid_t iid, ipc_call_t *icall)
00078 {
00079         /* Ignore parameters, the connection is already opened */
00080         while (true) {
00081 
00082                 ipc_call_t call;
00083                 ipc_callid_t callid = async_get_call(&call);
00084 
00085                 int retval;
00086 
00087                 switch (IPC_GET_IMETHOD(call)) {
00088                 case IPC_M_PHONE_HUNGUP:
00089                         /* TODO: Handle hangup */
00090                         return;
00091                 case IPC_FIRST_USER_METHOD:
00092                         mouse_handle_data(IPC_GET_ARG1(call));
00093                         break;
00094                 default:
00095                         retval = ENOENT;
00096                 }
00097                 async_answer_0(callid, retval);
00098         }
00099 }
00100 

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