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/*
 *  This file contains the MVME147 console IO package.
 *
 *  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.
 *
 *  MVME147 port for TNI - Telecom Bretagne
 *  by Dominique LE CAMPION (Dominique.LECAMPION@enst-bretagne.fr)
 *  May 1996
 *
 *  This file was taken from the DMV152 bsp
 *
 *  $Id: console.c,v 1.2 2001-09-27 12:00:16 chris Exp $
 */
 
#define M147_INIT
 
#include <bsp.h>
#include <rtems/libio.h>
#include <zilog/z8530.h>
 
 
/*  console_initialize
 *
 *  This routine initializes the console IO driver.
 *
 *  Input parameters: NONE
 *
 *  Output parameters:  NONE
 *
 *  Return values:
 */
 
rtems_device_driver console_initialize(
  rtems_device_major_number  major,
  rtems_device_minor_number  minor,
  void                      *arg
)
{
  rtems_status_code status;
 
  status = rtems_io_register_name(
    "/dev/console",
    major,
    (rtems_device_minor_number) 0
  );
 
  if (status != RTEMS_SUCCESSFUL)
    rtems_fatal_error_occurred(status);
 
  return RTEMS_SUCCESSFUL;
}
 
/*  is_character_ready
 *
 *  This routine returns TRUE if a character is available.
 *
 *  Input parameters: NONE
 *
 *  Output parameters:  NONE
 *
 *  Return values:
 */
 
rtems_boolean is_character_ready(
  char *ch
)
{
  rtems_unsigned8 rr_0;
 
  for ( ; ; ) {
    Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 );
    if ( !(rr_0 & RR_0_RX_DATA_AVAILABLE) )
      return( FALSE );
 
    Z8x30_READ_DATA( CONSOLE_DATA, *ch );
    return( TRUE );
  }
}
 
/*  inbyte
 *
 *  This routine reads a character from the SCC.
 *
 *  Input parameters: NONE
 *
 *  Output parameters:  NONE
 *
 *  Return values:
 *    character read from SCC
 */
 
char inbyte( void )
{
  rtems_unsigned8 rr_0;
  char ch;
 
  for ( ; ; ) {
    Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 );
    if ( (rr_0 & RR_0_RX_DATA_AVAILABLE) != 0 )
      break;
  }
 
  Z8x30_READ_DATA( CONSOLE_DATA, ch );
  return ( ch );
}
 
/*  outbyte
 *
 *  This routine transmits a character out the SCC.  It supports
 *  XON/XOFF flow control.
 *
 *  Input parameters:
 *    ch  - character to be transmitted
 *
 *  Output parameters:  NONE
 */
 
void outbyte(
  char ch
)
{
  rtems_unsigned8 rr_0;
  char            flow_control;
 
  for ( ; ; ) {
    Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 );
    if ( (rr_0 & RR_0_TX_BUFFER_EMPTY) != 0 )
      break;
  }
 
  for ( ; ; ) {
    Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 );
    if ( (rr_0 & RR_0_RX_DATA_AVAILABLE) == 0 )
      break;
 
    Z8x30_READ_DATA( CONSOLE_DATA, flow_control );
 
    if ( flow_control == XOFF )
      do {
        do {
          Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 );
        } while ( (rr_0 & RR_0_RX_DATA_AVAILABLE) == 0 );
        Z8x30_READ_DATA( CONSOLE_DATA, flow_control );
      } while ( flow_control != XON );
  }
 
  Z8x30_WRITE_DATA( CONSOLE_DATA, ch );
}
 
/*
 *  Open entry point
 */
 
rtems_device_driver console_open(
  rtems_device_major_number major,
  rtems_device_minor_number minor,
  void                    * arg
)
{
  return RTEMS_SUCCESSFUL;
}
 
/*
 *  Close entry point
 */
 
rtems_device_driver console_close(
  rtems_device_major_number major,
  rtems_device_minor_number minor,
  void                    * arg
)
{
  return RTEMS_SUCCESSFUL;
}
 
/*
 * read bytes from the serial port. We only have stdin.
 */
 
rtems_device_driver console_read(
  rtems_device_major_number major,
  rtems_device_minor_number minor,
  void                    * arg
)
{
  rtems_libio_rw_args_t *rw_args;
  char *buffer;
  int maximum;
  int count = 0;
 
  rw_args = (rtems_libio_rw_args_t *) arg;
 
  buffer = rw_args->buffer;
  maximum = rw_args->count;
 
  for (count = 0; count < maximum; count++) {
    buffer[ count ] = inbyte();
    if (buffer[ count ] == '\n' || buffer[ count ] == '\r') {
      buffer[ count++ ]  = '\n';
      break;
    }
  }
 
  rw_args->bytes_moved = count;
  return (count >= 0) ? RTEMS_SUCCESSFUL : RTEMS_UNSATISFIED;
}
 
/*
 * write bytes to the serial port. Stdout and stderr are the same.
 */
 
rtems_device_driver console_write(
  rtems_device_major_number major,
  rtems_device_minor_number minor,
  void                    * arg
)
{
  int count;
  int maximum;
  rtems_libio_rw_args_t *rw_args;
  char *buffer;
 
  rw_args = (rtems_libio_rw_args_t *) arg;
 
  buffer = rw_args->buffer;
  maximum = rw_args->count;
 
  for (count = 0; count < maximum; count++) {
    if ( buffer[ count ] == '\n') {
      outbyte('\r');
    }
    outbyte( buffer[ count ] );
  }
 
  rw_args->bytes_moved = maximum;
  return 0;
}
 
/*
 *  IO Control entry point
 */
 
rtems_device_driver console_control(
  rtems_device_major_number major,
  rtems_device_minor_number minor,
  void                    * arg
)
{
  return RTEMS_SUCCESSFUL;
}
 

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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [lib/] [libbsp/] [m68k/] [mvme147/] [console/] [console.c] - Blame information for rev 593

Line No.	Rev	Author	Line
1	30	unneback	`/*`
2			`* This file contains the MVME147 console IO package.`
3			`*`
4			`* COPYRIGHT (c) 1989-1999.`
5			`* On-Line Applications Research Corporation (OAR).`
6			`*`
7			`* The license and distribution terms for this file may be`
8			`* found in the file LICENSE in this distribution or at`
9			`* http://www.OARcorp.com/rtems/license.html.`
10			`*`
11			`* MVME147 port for TNI - Telecom Bretagne`
12			`* by Dominique LE CAMPION (Dominique.LECAMPION@enst-bretagne.fr)`
13			`* May 1996`
14			`*`
15			`* This file was taken from the DMV152 bsp`
16			`*`
17			`* $Id: console.c,v 1.2 2001-09-27 12:00:16 chris Exp $`
18			`*/`
19
20			`#define M147_INIT`
21
22			`#include <bsp.h>`
23			`#include <rtems/libio.h>`
24			`#include <zilog/z8530.h>`
25
26
27			`/* console_initialize`
28			`*`
29			`* This routine initializes the console IO driver.`
30			`*`
31			`* Input parameters: NONE`
32			`*`
33			`* Output parameters: NONE`
34			`*`
35			`* Return values:`
36			`*/`
37
38			`rtems_device_driver console_initialize(`
39			`rtems_device_major_number major,`
40			`rtems_device_minor_number minor,`
41			`void *arg`
42			`)`
43			`{`
44			`rtems_status_code status;`
45
46			`status = rtems_io_register_name(`
47			`"/dev/console",`
48			`major,`
49			`(rtems_device_minor_number) 0`
50			`);`
51
52			`if (status != RTEMS_SUCCESSFUL)`
53			`rtems_fatal_error_occurred(status);`
54
55			`return RTEMS_SUCCESSFUL;`
56			`}`
57
58			`/* is_character_ready`
59			`*`
60			`* This routine returns TRUE if a character is available.`
61			`*`
62			`* Input parameters: NONE`
63			`*`
64			`* Output parameters: NONE`
65			`*`
66			`* Return values:`
67			`*/`
68
69			`rtems_boolean is_character_ready(`
70			`char *ch`
71			`)`
72			`{`
73			`rtems_unsigned8 rr_0;`
74
75			`for ( ; ; ) {`
76			`Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 );`
77			`if ( !(rr_0 & RR_0_RX_DATA_AVAILABLE) )`
78			`return( FALSE );`
79
80			`Z8x30_READ_DATA( CONSOLE_DATA, *ch );`
81			`return( TRUE );`
82			`}`
83			`}`
84
85			`/* inbyte`
86			`*`
87			`* This routine reads a character from the SCC.`
88			`*`
89			`* Input parameters: NONE`
90			`*`
91			`* Output parameters: NONE`
92			`*`
93			`* Return values:`
94			`* character read from SCC`
95			`*/`
96
97			`char inbyte( void )`
98			`{`
99			`rtems_unsigned8 rr_0;`
100			`char ch;`
101
102			`for ( ; ; ) {`
103			`Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 );`
104			`if ( (rr_0 & RR_0_RX_DATA_AVAILABLE) != 0 )`
105			`break;`
106			`}`
107
108			`Z8x30_READ_DATA( CONSOLE_DATA, ch );`
109			`return ( ch );`
110			`}`
111
112			`/* outbyte`
113			`*`
114			`* This routine transmits a character out the SCC. It supports`
115			`* XON/XOFF flow control.`
116			`*`
117			`* Input parameters:`
118			`* ch - character to be transmitted`
119			`*`
120			`* Output parameters: NONE`
121			`*/`
122
123			`void outbyte(`
124			`char ch`
125			`)`
126			`{`
127			`rtems_unsigned8 rr_0;`
128			`char flow_control;`
129
130			`for ( ; ; ) {`
131			`Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 );`
132			`if ( (rr_0 & RR_0_TX_BUFFER_EMPTY) != 0 )`
133			`break;`
134			`}`
135
136			`for ( ; ; ) {`
137			`Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 );`
138			`if ( (rr_0 & RR_0_RX_DATA_AVAILABLE) == 0 )`
139			`break;`
140
141			`Z8x30_READ_DATA( CONSOLE_DATA, flow_control );`
142
143			`if ( flow_control == XOFF )`
144			`do {`
145			`do {`
146			`Z8x30_READ_CONTROL( CONSOLE_CONTROL, RR_0, rr_0 );`
147			`} while ( (rr_0 & RR_0_RX_DATA_AVAILABLE) == 0 );`
148			`Z8x30_READ_DATA( CONSOLE_DATA, flow_control );`
149			`} while ( flow_control != XON );`
150			`}`
151
152			`Z8x30_WRITE_DATA( CONSOLE_DATA, ch );`
153			`}`
154
155			`/*`
156			`* Open entry point`
157			`*/`
158
159			`rtems_device_driver console_open(`
160			`rtems_device_major_number major,`
161			`rtems_device_minor_number minor,`
162			`void * arg`
163			`)`
164			`{`
165			`return RTEMS_SUCCESSFUL;`
166			`}`
167
168			`/*`
169			`* Close entry point`
170			`*/`
171
172			`rtems_device_driver console_close(`
173			`rtems_device_major_number major,`
174			`rtems_device_minor_number minor,`
175			`void * arg`
176			`)`
177			`{`
178			`return RTEMS_SUCCESSFUL;`
179			`}`
180
181			`/*`
182			`* read bytes from the serial port. We only have stdin.`
183			`*/`
184
185			`rtems_device_driver console_read(`
186			`rtems_device_major_number major,`
187			`rtems_device_minor_number minor,`
188			`void * arg`
189			`)`
190			`{`
191			`rtems_libio_rw_args_t *rw_args;`
192			`char *buffer;`
193			`int maximum;`
194			`int count = 0;`
195
196			`rw_args = (rtems_libio_rw_args_t *) arg;`
197
198			`buffer = rw_args->buffer;`
199			`maximum = rw_args->count;`
200
201			`for (count = 0; count < maximum; count++) {`
202			`buffer[ count ] = inbyte();`
203			`if (buffer[ count ] == '\n' \|\| buffer[ count ] == '\r') {`
204			`buffer[ count++ ] = '\n';`
205			`break;`
206			`}`
207			`}`
208
209			`rw_args->bytes_moved = count;`
210			`return (count >= 0) ? RTEMS_SUCCESSFUL : RTEMS_UNSATISFIED;`
211			`}`
212
213			`/*`
214			`* write bytes to the serial port. Stdout and stderr are the same.`
215			`*/`
216
217			`rtems_device_driver console_write(`
218			`rtems_device_major_number major,`
219			`rtems_device_minor_number minor,`
220			`void * arg`
221			`)`
222			`{`
223			`int count;`
224			`int maximum;`
225			`rtems_libio_rw_args_t *rw_args;`
226			`char *buffer;`
227
228			`rw_args = (rtems_libio_rw_args_t *) arg;`
229
230			`buffer = rw_args->buffer;`
231			`maximum = rw_args->count;`
232
233			`for (count = 0; count < maximum; count++) {`
234			`if ( buffer[ count ] == '\n') {`
235			`outbyte('\r');`
236			`}`
237			`outbyte( buffer[ count ] );`
238			`}`
239
240			`rw_args->bytes_moved = maximum;`
241			`return 0;`
242			`}`
243
244			`/*`
245			`* IO Control entry point`
246			`*/`
247
248			`rtems_device_driver console_control(`
249			`rtems_device_major_number major,`
250			`rtems_device_minor_number minor,`
251			`void * arg`
252			`)`
253			`{`
254			`return RTEMS_SUCCESSFUL;`
255			`}`
256