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[/] [or1k/] [trunk/] [rtems-20020807/] [c/] [src/] [libmisc/] [serdbg/] [termios_printk.c] - Blame information for rev 1765

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/*===============================================================*\
| File: termios_printk.c                                          |
+-----------------------------------------------------------------+
|                    Copyright (c) 2002 IMD                       |
|      Ingenieurbuero fuer Microcomputertechnik Th. Doerfler      |
|      Hebststr. 8, 82178 Puchheim, Germany                       |
|      <Thomas.Doerfler@imd-systems.de>                           |
|  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.                     |
|                       all rights reserved                       |
+-----------------------------------------------------------------+
| TERMIOS printk support                                          |
| this module performs low-level printk output using              |
| a polled termios driver                                         |
|                                                                 |
+-----------------------------------------------------------------+
|   date                      history                        ID   |
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 13.05.02  creation                                         doe  |
|*****************************************************************|
|* termios_printk.c,v 1.1 2002/06/27 21:25:14 joel Exp
 *
|*****************************************************************|
\*===============================================================*/
 
#include <rtems.h>
#include <rtems/libio_.h>
#include <errno.h>
#include <stdio.h>
#include <fcntl.h>
#include <termios.h>
 
#include <rtems/termiostypes.h>
#include <rtems/bspIo.h>
#include <termios_printk.h>
 
/*
 * internal variables
 */
int termios_printk_fd = -1;
struct rtems_termios_tty *termios_printk_tty;
 
static void _termios_printk_null_char( char c ) {return;}
 
BSP_output_char_function_type BSP_output_char = _termios_printk_null_char;
BSP_polling_getchar_function_type BSP_poll_char;
 
/*=========================================================================*\
| Function:                                                                 |
\*-------------------------------------------------------------------------*/
void termios_printk_outputchar
/*-------------------------------------------------------------------------*\
| Purpose:                                                                  |
|    send one character to serial port                                      |
+---------------------------------------------------------------------------+
| Input Parameters:                                                         |
\*-------------------------------------------------------------------------*/
(
 char c  /* character to print */
)
/*-------------------------------------------------------------------------*\
| Return Value:                                                             |
|    <none>                                                                 |
\*=========================================================================*/
{
  static const char cr = '\r';
  /*
   * check, whether printk serial port is available
   */
 
  if ((termios_printk_tty != NULL) &&
      (termios_printk_tty->device.write != NULL)) {
    /*
     * call termios_printk polling callout, if available
     */
    if (termios_printk_conf.callout != NULL) {
      termios_printk_conf.callout();
    }
    /*
     * send character to debug serial port
     */
    if (c == '\n') {
      termios_printk_tty->device.write(termios_printk_tty->minor,&cr,1);
    }
    termios_printk_tty->device.write(termios_printk_tty->minor,&c,1);
  }
}
 
/*=========================================================================*\
| Function:                                                                 |
\*-------------------------------------------------------------------------*/
char termios_printk_inputchar
/*-------------------------------------------------------------------------*\
| Purpose:                                                                  |
|    wait for one character from serial port                                |
+---------------------------------------------------------------------------+
| Input Parameters:                                                         |
\*-------------------------------------------------------------------------*/
(
 void  /* none */
)
/*-------------------------------------------------------------------------*\
| Return Value:                                                             |
|    received character                                                     |
\*=========================================================================*/
{
  int c = -1;
  /*
   * check, whether debug serial port is available
   */
  if ((termios_printk_tty != NULL) &&
      (termios_printk_tty->device.pollRead != NULL)) {
    do {
      /*
       * call termios_printk polling callout, if available
       */
      if (termios_printk_conf.callout != NULL) {
        termios_printk_conf.callout();
      }
      /*
       * get character from debug serial port
       */
      c = termios_printk_tty->device.pollRead(termios_printk_tty->minor);
    } while (c < 0);
  }
  return c;
}
 
 
/*=========================================================================*\
| Function:                                                                 |
\*-------------------------------------------------------------------------*/
int termios_printk_open
 
/*-------------------------------------------------------------------------*\
| Purpose:                                                                  |
|    try to open given serial debug port                                    |
+---------------------------------------------------------------------------+
| Input Parameters:                                                         |
\*-------------------------------------------------------------------------*/
(
 const char *dev_name, /* name of device to open */
 unsigned32 baudrate   /* baud rate to use       */
)
/*-------------------------------------------------------------------------*\
| Return Value:                                                             |
|    0 on success, -1 and errno otherwise                                   |
\*=========================================================================*/
{
  boolean err_occurred = FALSE;
  rtems_libio_t *iop = NULL;
  struct termios act_termios;
  tcflag_t baudcode = B0;
 
  if (termios_printk_fd >= 0) {
    /*
     * already initialized
     */
    return 0;
  }
  /*
   * translate baudrate into baud code
   */
  switch(baudrate) {
  case     50: baudcode =     B50; break;
  case     75: baudcode =     B75; break;
  case    110: baudcode =    B110; break;
  case    134: baudcode =    B134; break;
  case    150: baudcode =    B150; break;
  case    200: baudcode =    B200; break;
  case    300: baudcode =    B300; break;
  case    600: baudcode =    B600; break;
  case   1200: baudcode =   B1200; break;
  case   1800: baudcode =   B1800; break;
  case   2400: baudcode =   B2400; break;
  case   4800: baudcode =   B4800; break;
  case   9600: baudcode =   B9600; break;
  case  19200: baudcode =  B19200; break;
  case  38400: baudcode =  B38400; break;
  case  57600: baudcode =  B57600; break;
  case 115200: baudcode = B115200; break;
  case 230400: baudcode = B230400; break;
  case 460800: baudcode = B460800; break;
  default    :   err_occurred = TRUE; errno = EINVAL; break;
  }
 /*
  * open device for serdbg operation
  */
  if (!err_occurred &&
      (dev_name != NULL) &&
      (dev_name[0] != '\0')) {
    termios_printk_fd = open(dev_name,O_RDWR);
    if (termios_printk_fd < 0) {
      err_occurred = TRUE;
    }
  }
  /*
   * capture tty structure
   */
  if (!err_occurred) {
    iop = &rtems_libio_iops[termios_printk_fd];
    termios_printk_tty = iop->data1;
  }
  /*
   * set device baudrate
   * (and transp mode, this is not really needed)
   * ...
   */
  /*
   * ... get fd settings
   */
  if (!err_occurred &&
      (0 != tcgetattr(termios_printk_fd,&act_termios))) {
      err_occurred = TRUE;
  }
  if (!err_occurred) {
 
    cfsetospeed(&act_termios,baudcode);
    cfsetispeed(&act_termios,baudcode);
 
    if (0 != tcsetattr(termios_printk_fd,TCSANOW,&act_termios)) {
        err_occurred = TRUE;
    }
  }
  if (!err_occurred) {
    BSP_output_char = termios_printk_outputchar;
    BSP_poll_char = termios_printk_inputchar;
  }
  return (err_occurred
          ? -1
          : 0);
}

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[/] [or1k/] [trunk/] [rtems-20020807/] [c/] [src/] [libmisc/] [serdbg/] [termios_printk.c] - Blame information for rev 1765

Line No.	Rev	Author	Line
1	1026	ivang	`/===============================================================\`
2			`\| File: termios_printk.c \|`
3			`+-----------------------------------------------------------------+`
4			`\| Copyright (c) 2002 IMD \|`
5			`\| Ingenieurbuero fuer Microcomputertechnik Th. Doerfler \|`
6			`\| Hebststr. 8, 82178 Puchheim, Germany \|`
7			`\| <Thomas.Doerfler@imd-systems.de> \|`
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			`\| all rights reserved \|`
12			`+-----------------------------------------------------------------+`
13			`\| TERMIOS printk support \|`
14			`\| this module performs low-level printk output using \|`
15			`\| a polled termios driver \|`
16			`\| \|`
17			`+-----------------------------------------------------------------+`
18			`\| date history ID \|`
19			`\| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ \|`
20			`\| 13.05.02 creation doe \|`
21			`\|*****************************************************************\|`
22			`\|* termios_printk.c,v 1.1 2002/06/27 21:25:14 joel Exp`
23			`*`
24			`\|*****************************************************************\|`
25			`\===============================================================/`
26
27			`#include <rtems.h>`
28			`#include <rtems/libio_.h>`
29			`#include <errno.h>`
30			`#include <stdio.h>`
31			`#include <fcntl.h>`
32			`#include <termios.h>`
33
34			`#include <rtems/termiostypes.h>`
35			`#include <rtems/bspIo.h>`
36			`#include <termios_printk.h>`
37
38			`/*`
39			`* internal variables`
40			`*/`
41			`int termios_printk_fd = -1;`
42			`struct rtems_termios_tty *termios_printk_tty;`
43
44			`static void _termios_printk_null_char( char c ) {return;}`
45
46			`BSP_output_char_function_type BSP_output_char = _termios_printk_null_char;`
47			`BSP_polling_getchar_function_type BSP_poll_char;`
48
49			`/=========================================================================\`
50			`\| Function: \|`
51			`\-------------------------------------------------------------------------/`
52			`void termios_printk_outputchar`
53			`/-------------------------------------------------------------------------\`
54			`\| Purpose: \|`
55			`\| send one character to serial port \|`
56			`+---------------------------------------------------------------------------+`
57			`\| Input Parameters: \|`
58			`\-------------------------------------------------------------------------/`
59			`(`
60			`char c /* character to print */`
61			`)`
62			`/-------------------------------------------------------------------------\`
63			`\| Return Value: \|`
64			`\| <none> \|`
65			`\=========================================================================/`
66			`{`
67			`static const char cr = '\r';`
68			`/*`
69			`* check, whether printk serial port is available`
70			`*/`
71
72			`if ((termios_printk_tty != NULL) &&`
73			`(termios_printk_tty->device.write != NULL)) {`
74			`/*`
75			`* call termios_printk polling callout, if available`
76			`*/`
77			`if (termios_printk_conf.callout != NULL) {`
78			`termios_printk_conf.callout();`
79			`}`
80			`/*`
81			`* send character to debug serial port`
82			`*/`
83			`if (c == '\n') {`
84			`termios_printk_tty->device.write(termios_printk_tty->minor,&cr,1);`
85			`}`
86			`termios_printk_tty->device.write(termios_printk_tty->minor,&c,1);`
87			`}`
88			`}`
89
90			`/=========================================================================\`
91			`\| Function: \|`
92			`\-------------------------------------------------------------------------/`
93			`char termios_printk_inputchar`
94			`/-------------------------------------------------------------------------\`
95			`\| Purpose: \|`
96			`\| wait for one character from serial port \|`
97			`+---------------------------------------------------------------------------+`
98			`\| Input Parameters: \|`
99			`\-------------------------------------------------------------------------/`
100			`(`
101			`void /* none */`
102			`)`
103			`/-------------------------------------------------------------------------\`
104			`\| Return Value: \|`
105			`\| received character \|`
106			`\=========================================================================/`
107			`{`
108			`int c = -1;`
109			`/*`
110			`* check, whether debug serial port is available`
111			`*/`
112			`if ((termios_printk_tty != NULL) &&`
113			`(termios_printk_tty->device.pollRead != NULL)) {`
114			`do {`
115			`/*`
116			`* call termios_printk polling callout, if available`
117			`*/`
118			`if (termios_printk_conf.callout != NULL) {`
119			`termios_printk_conf.callout();`
120			`}`
121			`/*`
122			`* get character from debug serial port`
123			`*/`
124			`c = termios_printk_tty->device.pollRead(termios_printk_tty->minor);`
125			`} while (c < 0);`
126			`}`
127			`return c;`
128			`}`
129
130
131			`/=========================================================================\`
132			`\| Function: \|`
133			`\-------------------------------------------------------------------------/`
134			`int termios_printk_open`
135
136			`/-------------------------------------------------------------------------\`
137			`\| Purpose: \|`
138			`\| try to open given serial debug port \|`
139			`+---------------------------------------------------------------------------+`
140			`\| Input Parameters: \|`
141			`\-------------------------------------------------------------------------/`
142			`(`
143			`const char dev_name, / name of device to open */`
144			`unsigned32 baudrate /* baud rate to use */`
145			`)`
146			`/-------------------------------------------------------------------------\`
147			`\| Return Value: \|`
148			`\| 0 on success, -1 and errno otherwise \|`
149			`\=========================================================================/`
150			`{`
151			`boolean err_occurred = FALSE;`
152			`rtems_libio_t *iop = NULL;`
153			`struct termios act_termios;`
154			`tcflag_t baudcode = B0;`
155
156			`if (termios_printk_fd >= 0) {`
157			`/*`
158			`* already initialized`
159			`*/`
160			`return 0;`
161			`}`
162			`/*`
163			`* translate baudrate into baud code`
164			`*/`
165			`switch(baudrate) {`
166			`case 50: baudcode = B50; break;`
167			`case 75: baudcode = B75; break;`
168			`case 110: baudcode = B110; break;`
169			`case 134: baudcode = B134; break;`
170			`case 150: baudcode = B150; break;`
171			`case 200: baudcode = B200; break;`
172			`case 300: baudcode = B300; break;`
173			`case 600: baudcode = B600; break;`
174			`case 1200: baudcode = B1200; break;`
175			`case 1800: baudcode = B1800; break;`
176			`case 2400: baudcode = B2400; break;`
177			`case 4800: baudcode = B4800; break;`
178			`case 9600: baudcode = B9600; break;`
179			`case 19200: baudcode = B19200; break;`
180			`case 38400: baudcode = B38400; break;`
181			`case 57600: baudcode = B57600; break;`
182			`case 115200: baudcode = B115200; break;`
183			`case 230400: baudcode = B230400; break;`
184			`case 460800: baudcode = B460800; break;`
185			`default : err_occurred = TRUE; errno = EINVAL; break;`
186			`}`
187			`/*`
188			`* open device for serdbg operation`
189			`*/`
190			`if (!err_occurred &&`
191			`(dev_name != NULL) &&`
192			`(dev_name[0] != '\0')) {`
193			`termios_printk_fd = open(dev_name,O_RDWR);`
194			`if (termios_printk_fd < 0) {`
195			`err_occurred = TRUE;`
196			`}`
197			`}`
198			`/*`
199			`* capture tty structure`
200			`*/`
201			`if (!err_occurred) {`
202			`iop = &rtems_libio_iops[termios_printk_fd];`
203			`termios_printk_tty = iop->data1;`
204			`}`
205			`/*`
206			`* set device baudrate`
207			`* (and transp mode, this is not really needed)`
208			`* ...`
209			`*/`
210			`/*`
211			`* ... get fd settings`
212			`*/`
213			`if (!err_occurred &&`
214			`(0 != tcgetattr(termios_printk_fd,&act_termios))) {`
215			`err_occurred = TRUE;`
216			`}`
217			`if (!err_occurred) {`
218
219			`cfsetospeed(&act_termios,baudcode);`
220			`cfsetispeed(&act_termios,baudcode);`
221
222			`if (0 != tcsetattr(termios_printk_fd,TCSANOW,&act_termios)) {`
223			`err_occurred = TRUE;`
224			`}`
225			`}`
226			`if (!err_occurred) {`
227			`BSP_output_char = termios_printk_outputchar;`
228			`BSP_poll_char = termios_printk_inputchar;`
229			`}`
230			`return (err_occurred`
231			`? -1`
232			`: 0);`
233			`}`