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/*
 *  Input/Output Manager
 *
 *
 *  COPYRIGHT (c) 1989-1999.
 *  On-Line Applications Research Corporation (OAR).
 *
 *  The license and distribution terms for this file may be
 *  found in the file LICENSE in this distribution or at
 *  http://www.OARcorp.com/rtems/license.html.
 *
 *  $Id: io.c,v 1.2 2001-09-27 11:59:20 chris Exp $
 */
 
#include <rtems/system.h>
#include <rtems/io.h>
#include <rtems/score/isr.h>
#include <rtems/score/thread.h>
#include <rtems/score/wkspace.h>
 
#include <string.h>
 
/*PAGE
 *
 *  _IO_Manager_initialization
 *
 */
 
void _IO_Manager_initialization(
  rtems_driver_address_table *driver_table,
  unsigned32                  number_of_drivers,
  unsigned32                  number_of_devices
)
{
  void                *tmp;
  unsigned32           index;
  rtems_driver_name_t *np;
 
  _IO_Driver_address_table = driver_table;
  _IO_Number_of_drivers    = number_of_drivers;
  _IO_Number_of_devices    = number_of_devices;
 
  tmp = _Workspace_Allocate_or_fatal_error(
    sizeof( rtems_driver_name_t ) * ( number_of_devices + 1 )
  );
 
  _IO_Driver_name_table = (rtems_driver_name_t *) tmp;
 
  for( index=0, np = _IO_Driver_name_table ;
       index < _IO_Number_of_devices ;
       index++, np++ ) {
    np->device_name = 0;
    np->device_name_length = 0;
    np->major = 0;
    np->minor = 0;
  }
}
 
/*PAGE
 *
 *  _IO_Initialize_all_drivers
 *
 *  This routine initializes all device drivers
 *
 *  Input Paramters:   NONE
 *
 *  Output Parameters: NONE
 */
 
void _IO_Initialize_all_drivers( void )
{
   rtems_device_major_number major;
 
   for ( major=0 ; major < _IO_Number_of_drivers ; major ++ )
     (void) rtems_io_initialize( major, 0, NULL);
}
 
/*PAGE
 *
 *  rtems_io_register_name
 *
 *  Associate a name with a driver
 *
 *  Input Paramters:
 *    device_name - pointer to name string to associate with device
 *    major       - device major number to receive name
 *    minor       - device minor number to receive name
 *
 *  Output Parameters:
 *    RTEMS_SUCCESSFUL - if successful
 *    error code       - if unsuccessful
 */
 
#if 0
rtems_status_code rtems_io_register_name(
    char *device_name,
    rtems_device_major_number major,
    rtems_device_minor_number minor
  )
{
    rtems_driver_name_t *np;
    unsigned32 level;
    unsigned32 index;
 
    /* find an empty slot */
    for( index=0, np = _IO_Driver_name_table ;
         index < _IO_Number_of_devices ;
         index++, np++ )
    {
 
        _ISR_Disable(level);
        if (np->device_name == 0)
        {
            np->device_name = device_name;
            np->device_name_length = strlen(device_name);
            np->major = major;
            np->minor = minor;
            _ISR_Enable(level);
 
            return RTEMS_SUCCESSFUL;
        }
        _ISR_Enable(level);
    }
 
    return RTEMS_TOO_MANY;
}
#endif
 
/*PAGE
 *
 *  rtems_io_lookup_name
 *
 *  Find what driver "owns" this name
 *
 *  Input Paramters:
 *    name - name to lookup the associated device
 *
 *  Output Parameters:
 *    device_info      - device associate with name
 *    RTEMS_SUCCESSFUL - if successful
 *    error code       - if unsuccessful
 */
 
#if 0
rtems_status_code rtems_io_lookup_name(
    const char           *name,
    rtems_driver_name_t **device_info
)
{
    rtems_driver_name_t *np;
    unsigned32 index;
 
    for( index=0, np = _IO_Driver_name_table ;
         index < _IO_Number_of_devices ;
         index++, np++ )
        if (np->device_name)
            if (strncmp(np->device_name, name, np->device_name_length) == 0)
            {
                *device_info = np;
                return RTEMS_SUCCESSFUL;
            }
 
    *device_info = 0;
    return RTEMS_UNSATISFIED;
}
#endif
 
 
/*PAGE
 *
 *  rtems_io_initialize
 *
 *  This routine is the initialization directive of the IO manager.
 *
 *  Input Paramters:
 *    major        - device driver number
 *    minor        - device number
 *    argument     - pointer to argument(s)
 *
 *  Output Parameters:
 *    returns       - return code
 */
 
rtems_status_code rtems_io_initialize(
  rtems_device_major_number  major,
  rtems_device_minor_number  minor,
  void             *argument
)
{
    rtems_device_driver_entry callout;
 
    if ( major >= _IO_Number_of_drivers )
        return RTEMS_INVALID_NUMBER;
 
    callout = _IO_Driver_address_table[major].initialization;
    return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL;
}
 
/*PAGE
 *
 *  rtems_io_open
 *
 *  This routine is the open directive of the IO manager.
 *
 *  Input Paramters:
 *    major        - device driver number
 *    minor        - device number
 *    argument     - pointer to argument(s)
 *
 *  Output Parameters:
 *    returns       - return code
 */
 
rtems_status_code rtems_io_open(
  rtems_device_major_number  major,
  rtems_device_minor_number  minor,
  void                      *argument
)
{
    rtems_device_driver_entry callout;
 
    if ( major >= _IO_Number_of_drivers )
        return RTEMS_INVALID_NUMBER;
 
    callout = _IO_Driver_address_table[major].open;
    return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL;
}
 
/*PAGE
 *
 *  rtems_io_close
 *
 *  This routine is the close directive of the IO manager.
 *
 *  Input Paramters:
 *    major        - device driver number
 *    minor        - device number
 *    argument     - pointer to argument(s)
 *
 *  Output Parameters:
 *    returns       - return code
 */
 
rtems_status_code rtems_io_close(
  rtems_device_major_number  major,
  rtems_device_minor_number  minor,
  void                      *argument
)
{
    rtems_device_driver_entry callout;
 
    if ( major >= _IO_Number_of_drivers )
        return RTEMS_INVALID_NUMBER;
 
    callout = _IO_Driver_address_table[major].close;
    return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL;
}
 
/*PAGE
 *
 *  rtems_io_read
 *
 *  This routine is the read directive of the IO manager.
 *
 *  Input Paramters:
 *    major        - device driver number
 *    minor        - device number
 *    argument     - pointer to argument(s)
 *
 *  Output Parameters:
 *    returns       - return code
 */
 
rtems_status_code rtems_io_read(
  rtems_device_major_number  major,
  rtems_device_minor_number  minor,
  void                      *argument
)
{
    rtems_device_driver_entry callout;
 
    if ( major >= _IO_Number_of_drivers )
        return RTEMS_INVALID_NUMBER;
 
    callout = _IO_Driver_address_table[major].read;
    return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL;
}
 
/*PAGE
 *
 *  rtems_io_write
 *
 *  This routine is the write directive of the IO manager.
 *
 *  Input Paramters:
 *    major        - device driver number
 *    minor        - device number
 *    argument     - pointer to argument(s)
 *
 *  Output Parameters:
 *    returns       - return code
 */
 
rtems_status_code rtems_io_write(
  rtems_device_major_number  major,
  rtems_device_minor_number  minor,
  void                      *argument
)
{
    rtems_device_driver_entry callout;
 
    if ( major >= _IO_Number_of_drivers )
        return RTEMS_INVALID_NUMBER;
 
    callout = _IO_Driver_address_table[major].write;
    return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL;
}
 
/*PAGE
 *
 *  rtems_io_control
 *
 *  This routine is the control directive of the IO manager.
 *
 *  Input Paramters:
 *    major        - device driver number
 *    minor        - device number
 *    argument     - pointer to argument(s)
 *
 *  Output Parameters:
 *    returns       - return code
 */
 
rtems_status_code rtems_io_control(
  rtems_device_major_number  major,
  rtems_device_minor_number  minor,
  void                      *argument
)
{
    rtems_device_driver_entry callout;
 
    if ( major >= _IO_Number_of_drivers )
        return RTEMS_INVALID_NUMBER;
 
    callout = _IO_Driver_address_table[major].control;
    return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL;
}
 

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[/] [or1k/] [trunk/] [rtems/] [c/] [src/] [exec/] [sapi/] [src/] [io.c] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	158	chris	`/*`
2			`* Input/Output Manager`
3			`*`
4			`*`
5			`* COPYRIGHT (c) 1989-1999.`
6			`* On-Line Applications Research Corporation (OAR).`
7			`*`
8			`* The license and distribution terms for this file may be`
9			`* found in the file LICENSE in this distribution or at`
10			`* http://www.OARcorp.com/rtems/license.html.`
11			`*`
12	208	chris	`* $Id: io.c,v 1.2 2001-09-27 11:59:20 chris Exp $`
13	158	chris	`*/`
14
15			`#include <rtems/system.h>`
16			`#include <rtems/io.h>`
17			`#include <rtems/score/isr.h>`
18			`#include <rtems/score/thread.h>`
19			`#include <rtems/score/wkspace.h>`
20
21			`#include <string.h>`
22
23			`/*PAGE`
24			`*`
25			`* _IO_Manager_initialization`
26			`*`
27			`*/`
28
29			`void _IO_Manager_initialization(`
30			`rtems_driver_address_table *driver_table,`
31			`unsigned32 number_of_drivers,`
32			`unsigned32 number_of_devices`
33			`)`
34			`{`
35			`void *tmp;`
36			`unsigned32 index;`
37			`rtems_driver_name_t *np;`
38
39			`_IO_Driver_address_table = driver_table;`
40			`_IO_Number_of_drivers = number_of_drivers;`
41			`_IO_Number_of_devices = number_of_devices;`
42
43			`tmp = _Workspace_Allocate_or_fatal_error(`
44			`sizeof( rtems_driver_name_t ) * ( number_of_devices + 1 )`
45			`);`
46
47			`_IO_Driver_name_table = (rtems_driver_name_t *) tmp;`
48
49			`for( index=0, np = _IO_Driver_name_table ;`
50			`index < _IO_Number_of_devices ;`
51			`index++, np++ ) {`
52			`np->device_name = 0;`
53			`np->device_name_length = 0;`
54			`np->major = 0;`
55			`np->minor = 0;`
56			`}`
57			`}`
58
59			`/*PAGE`
60			`*`
61			`* _IO_Initialize_all_drivers`
62			`*`
63			`* This routine initializes all device drivers`
64			`*`
65			`* Input Paramters: NONE`
66			`*`
67			`* Output Parameters: NONE`
68			`*/`
69
70			`void _IO_Initialize_all_drivers( void )`
71			`{`
72			`rtems_device_major_number major;`
73
74			`for ( major=0 ; major < _IO_Number_of_drivers ; major ++ )`
75			`(void) rtems_io_initialize( major, 0, NULL);`
76			`}`
77
78			`/*PAGE`
79			`*`
80			`* rtems_io_register_name`
81			`*`
82			`* Associate a name with a driver`
83			`*`
84			`* Input Paramters:`
85			`* device_name - pointer to name string to associate with device`
86			`* major - device major number to receive name`
87			`* minor - device minor number to receive name`
88			`*`
89			`* Output Parameters:`
90			`* RTEMS_SUCCESSFUL - if successful`
91			`* error code - if unsuccessful`
92			`*/`
93
94			`#if 0`
95			`rtems_status_code rtems_io_register_name(`
96			`char *device_name,`
97			`rtems_device_major_number major,`
98			`rtems_device_minor_number minor`
99			`)`
100			`{`
101			`rtems_driver_name_t *np;`
102			`unsigned32 level;`
103			`unsigned32 index;`
104
105			`/* find an empty slot */`
106			`for( index=0, np = _IO_Driver_name_table ;`
107			`index < _IO_Number_of_devices ;`
108			`index++, np++ )`
109			`{`
110
111			`_ISR_Disable(level);`
112			`if (np->device_name == 0)`
113			`{`
114			`np->device_name = device_name;`
115			`np->device_name_length = strlen(device_name);`
116			`np->major = major;`
117			`np->minor = minor;`
118			`_ISR_Enable(level);`
119
120			`return RTEMS_SUCCESSFUL;`
121			`}`
122			`_ISR_Enable(level);`
123			`}`
124
125			`return RTEMS_TOO_MANY;`
126			`}`
127			`#endif`
128
129			`/*PAGE`
130			`*`
131			`* rtems_io_lookup_name`
132			`*`
133			`* Find what driver "owns" this name`
134			`*`
135			`* Input Paramters:`
136			`* name - name to lookup the associated device`
137			`*`
138			`* Output Parameters:`
139			`* device_info - device associate with name`
140			`* RTEMS_SUCCESSFUL - if successful`
141			`* error code - if unsuccessful`
142			`*/`
143
144			`#if 0`
145			`rtems_status_code rtems_io_lookup_name(`
146			`const char *name,`
147			`rtems_driver_name_t **device_info`
148			`)`
149			`{`
150			`rtems_driver_name_t *np;`
151			`unsigned32 index;`
152
153			`for( index=0, np = _IO_Driver_name_table ;`
154			`index < _IO_Number_of_devices ;`
155			`index++, np++ )`
156			`if (np->device_name)`
157			`if (strncmp(np->device_name, name, np->device_name_length) == 0)`
158			`{`
159			`*device_info = np;`
160			`return RTEMS_SUCCESSFUL;`
161			`}`
162
163			`*device_info = 0;`
164			`return RTEMS_UNSATISFIED;`
165			`}`
166			`#endif`
167
168
169			`/*PAGE`
170			`*`
171			`* rtems_io_initialize`
172			`*`
173			`* This routine is the initialization directive of the IO manager.`
174			`*`
175			`* Input Paramters:`
176			`* major - device driver number`
177			`* minor - device number`
178			`* argument - pointer to argument(s)`
179			`*`
180			`* Output Parameters:`
181			`* returns - return code`
182			`*/`
183
184			`rtems_status_code rtems_io_initialize(`
185			`rtems_device_major_number major,`
186			`rtems_device_minor_number minor,`
187			`void *argument`
188			`)`
189			`{`
190			`rtems_device_driver_entry callout;`
191
192			`if ( major >= _IO_Number_of_drivers )`
193			`return RTEMS_INVALID_NUMBER;`
194
195			`callout = _IO_Driver_address_table[major].initialization;`
196			`return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL;`
197			`}`
198
199			`/*PAGE`
200			`*`
201			`* rtems_io_open`
202			`*`
203			`* This routine is the open directive of the IO manager.`
204			`*`
205			`* Input Paramters:`
206			`* major - device driver number`
207			`* minor - device number`
208			`* argument - pointer to argument(s)`
209			`*`
210			`* Output Parameters:`
211			`* returns - return code`
212			`*/`
213
214			`rtems_status_code rtems_io_open(`
215			`rtems_device_major_number major,`
216			`rtems_device_minor_number minor,`
217			`void *argument`
218			`)`
219			`{`
220			`rtems_device_driver_entry callout;`
221
222			`if ( major >= _IO_Number_of_drivers )`
223			`return RTEMS_INVALID_NUMBER;`
224
225			`callout = _IO_Driver_address_table[major].open;`
226			`return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL;`
227			`}`
228
229			`/*PAGE`
230			`*`
231			`* rtems_io_close`
232			`*`
233			`* This routine is the close directive of the IO manager.`
234			`*`
235			`* Input Paramters:`
236			`* major - device driver number`
237			`* minor - device number`
238			`* argument - pointer to argument(s)`
239			`*`
240			`* Output Parameters:`
241			`* returns - return code`
242			`*/`
243
244			`rtems_status_code rtems_io_close(`
245			`rtems_device_major_number major,`
246			`rtems_device_minor_number minor,`
247			`void *argument`
248			`)`
249			`{`
250			`rtems_device_driver_entry callout;`
251
252			`if ( major >= _IO_Number_of_drivers )`
253			`return RTEMS_INVALID_NUMBER;`
254
255			`callout = _IO_Driver_address_table[major].close;`
256			`return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL;`
257			`}`
258
259			`/*PAGE`
260			`*`
261			`* rtems_io_read`
262			`*`
263			`* This routine is the read directive of the IO manager.`
264			`*`
265			`* Input Paramters:`
266			`* major - device driver number`
267			`* minor - device number`
268			`* argument - pointer to argument(s)`
269			`*`
270			`* Output Parameters:`
271			`* returns - return code`
272			`*/`
273
274			`rtems_status_code rtems_io_read(`
275			`rtems_device_major_number major,`
276			`rtems_device_minor_number minor,`
277			`void *argument`
278			`)`
279			`{`
280			`rtems_device_driver_entry callout;`
281
282			`if ( major >= _IO_Number_of_drivers )`
283			`return RTEMS_INVALID_NUMBER;`
284
285			`callout = _IO_Driver_address_table[major].read;`
286			`return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL;`
287			`}`
288
289			`/*PAGE`
290			`*`
291			`* rtems_io_write`
292			`*`
293			`* This routine is the write directive of the IO manager.`
294			`*`
295			`* Input Paramters:`
296			`* major - device driver number`
297			`* minor - device number`
298			`* argument - pointer to argument(s)`
299			`*`
300			`* Output Parameters:`
301			`* returns - return code`
302			`*/`
303
304			`rtems_status_code rtems_io_write(`
305			`rtems_device_major_number major,`
306			`rtems_device_minor_number minor,`
307			`void *argument`
308			`)`
309			`{`
310			`rtems_device_driver_entry callout;`
311
312			`if ( major >= _IO_Number_of_drivers )`
313			`return RTEMS_INVALID_NUMBER;`
314
315			`callout = _IO_Driver_address_table[major].write;`
316			`return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL;`
317			`}`
318
319			`/*PAGE`
320			`*`
321			`* rtems_io_control`
322			`*`
323			`* This routine is the control directive of the IO manager.`
324			`*`
325			`* Input Paramters:`
326			`* major - device driver number`
327			`* minor - device number`
328			`* argument - pointer to argument(s)`
329			`*`
330			`* Output Parameters:`
331			`* returns - return code`
332			`*/`
333
334			`rtems_status_code rtems_io_control(`
335			`rtems_device_major_number major,`
336			`rtems_device_minor_number minor,`
337			`void *argument`
338			`)`
339			`{`
340			`rtems_device_driver_entry callout;`
341
342			`if ( major >= _IO_Number_of_drivers )`
343			`return RTEMS_INVALID_NUMBER;`
344
345			`callout = _IO_Driver_address_table[major].control;`
346			`return callout ? callout(major, minor, argument) : RTEMS_SUCCESSFUL;`
347			`}`
348