2 * Server-side serial port communications management
4 * Copyright (C) 1998 Alexandre Julliard
5 * Copyright (C) 2000 Mike McCormack
8 * Add async read, write and WaitCommEvent handling.
20 #ifdef HAVE_SYS_ERRNO_H
21 #include <sys/errno.h>
24 #include <sys/types.h>
29 #include <sys/ioctl.h>
38 static void serial_dump( struct object *obj, int verbose );
39 static int serial_get_fd( struct object *obj );
40 static int serial_get_info( struct object *obj, struct get_file_info_request *req );
41 static int serial_get_poll_events( struct object *obj );
49 unsigned int readinterval;
50 unsigned int readconst;
51 unsigned int readmult;
52 unsigned int writeconst;
53 unsigned int writemult;
55 unsigned int eventmask;
56 unsigned int commerror;
58 struct termios original;
60 /* FIXME: add dcb, comm status, handler module, sharing */
63 static const struct object_ops serial_ops =
65 sizeof(struct serial), /* size */
66 serial_dump, /* dump */
67 default_poll_add_queue, /* add_queue */
68 default_poll_remove_queue, /* remove_queue */
69 default_poll_signaled, /* signaled */
70 no_satisfied, /* satisfied */
71 serial_get_poll_events, /* get_poll_events */
72 default_poll_event, /* poll_event */
73 serial_get_fd, /* get_fd */
75 serial_get_info, /* get_file_info */
76 no_destroy /* destroy */
79 /* SERIAL PORT functions */
81 static struct serial *create_serial( const char *nameptr, size_t len, unsigned int access )
83 struct serial *serial;
88 if (!(name = mem_alloc( len + 1 ))) return NULL;
89 memcpy( name, nameptr, len );
92 switch(access & (GENERIC_READ | GENERIC_WRITE))
94 case GENERIC_READ: flags |= O_RDONLY; break;
95 case GENERIC_WRITE: flags |= O_WRONLY; break;
96 case GENERIC_READ|GENERIC_WRITE: flags |= O_RDWR; break;
100 fd = open( name, flags );
108 /* check its really a serial port */
109 if (tcgetattr(fd,&tios))
116 if ((serial = alloc_object( &serial_ops, fd )))
118 serial->access = access;
119 serial->readinterval = 0;
120 serial->readmult = 0;
121 serial->readconst = 0;
122 serial->writemult = 0;
123 serial->writeconst = 0;
124 serial->eventmask = 0;
125 serial->commerror = 0;
130 static void serial_dump( struct object *obj, int verbose )
132 struct serial *serial = (struct serial *)obj;
133 assert( obj->ops == &serial_ops );
134 fprintf( stderr, "Port fd=%d mask=%x\n", serial->obj.fd, serial->eventmask );
137 struct serial *get_serial_obj( struct process *process, handle_t handle, unsigned int access )
139 return (struct serial *)get_handle_obj( process, handle, access, &serial_ops );
142 static int serial_get_poll_events( struct object *obj )
144 struct serial *serial = (struct serial *)obj;
146 assert( obj->ops == &serial_ops );
147 if (serial->access & GENERIC_READ) events |= POLLIN;
148 if (serial->access & GENERIC_WRITE) events |= POLLOUT;
152 static int serial_get_fd( struct object *obj )
154 struct serial *serial = (struct serial *)obj;
155 assert( obj->ops == &serial_ops );
156 return serial->obj.fd;
159 static int serial_get_info( struct object *obj, struct get_file_info_request *req )
161 assert( obj->ops == &serial_ops );
162 req->type = FILE_TYPE_CHAR;
164 req->access_time = 0;
175 /* these function calculates the timeout for an async operation
177 int get_serial_async_timeout(struct object *obj, int type, int count)
179 struct serial *serial = (struct serial *)obj;
181 if(obj->ops != &serial_ops)
186 case ASYNC_TYPE_READ:
187 return serial->readconst + serial->readmult*count;
188 case ASYNC_TYPE_WRITE:
189 return serial->writeconst + serial->writemult*count;
195 /* create a serial */
196 DECL_HANDLER(create_serial)
198 struct serial *serial;
201 if ((serial = create_serial( get_req_data(req), get_req_data_size(req), req->access )))
203 req->handle = alloc_handle( current->process, serial, req->access, req->inherit );
204 release_object( serial );
208 DECL_HANDLER(get_serial_info)
210 struct serial *serial;
212 if ((serial = get_serial_obj( current->process, req->handle, 0 )))
215 req->readinterval = serial->readinterval;
216 req->readconst = serial->readconst;
217 req->readmult = serial->readmult;
218 req->writeconst = serial->writeconst;
219 req->writemult = serial->writemult;
222 req->eventmask = serial->eventmask;
224 /* comm port error status */
225 req->commerror = serial->commerror;
227 release_object( serial );
231 DECL_HANDLER(set_serial_info)
233 struct serial *serial;
235 if ((serial = get_serial_obj( current->process, req->handle, 0 )))
238 if(req->flags & SERIALINFO_SET_TIMEOUTS)
240 serial->readinterval = req->readinterval;
241 serial->readconst = req->readconst;
242 serial->readmult = req->readmult;
243 serial->writeconst = req->writeconst;
244 serial->writemult = req->writemult;
248 if(req->flags & SERIALINFO_SET_MASK)
250 serial->eventmask = req->eventmask;
253 /* comm port error status */
254 if(req->flags & SERIALINFO_SET_ERROR)
256 serial->commerror = req->commerror;
259 release_object( serial );