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[/] [or1k_old/] [trunk/] [uclinux/] [uClinux-2.0.x/] [drivers/] [sound/] [patmgr.c] - Blame information for rev 199

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1 199 simons 
/*
2 
 * sound/patmgr.c
3 
 *
4 
 * The patch manager interface for the /dev/sequencer
5 
 */
6 
/*
7 
 * Copyright (C) by Hannu Savolainen 1993-1996
8 
 *
9 
 * USS/Lite for Linux is distributed under the GNU GENERAL PUBLIC LICENSE (GPL)
10 
 * Version 2 (June 1991). See the "COPYING" file distributed with this software
11 
 * for more info.
12 
 */
13 
#include <linux/config.h>
14 
 
15 
 
16 
#define PATMGR_C
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#include "sound_config.h"
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19 
#if defined(CONFIG_SEQUENCER)
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21 
static wait_handle *server_procs[MAX_SYNTH_DEV] =
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{NULL};
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static volatile struct snd_wait server_wait_flag[MAX_SYNTH_DEV] =
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{
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  {0}};
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static struct patmgr_info *mbox[MAX_SYNTH_DEV] =
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{NULL};
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static volatile int msg_direction[MAX_SYNTH_DEV] =
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{0};
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32 
static int      pmgr_opened[MAX_SYNTH_DEV] =
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{0};
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#define A_TO_S  1
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#define S_TO_A  2
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38 
static wait_handle *appl_proc = NULL;
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static volatile struct snd_wait appl_wait_flag =
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{0};
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42 
int
43 
pmgr_open (int dev)
44 
{
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  if (dev < 0 || dev >= num_synths)
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    return -(ENXIO);
47 
 
48 
  if (pmgr_opened[dev])
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    return -(EBUSY);
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  pmgr_opened[dev] = 1;
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  server_wait_flag[dev].flags = WK_NONE;
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  return 0;
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}
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57 
void
58 
pmgr_release (int dev)
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{
60 
 
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  if (mbox[dev])                /*
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                                 * Killed in action. Inform the client
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                                 */
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    {
65 
 
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      mbox[dev]->key = PM_ERROR;
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      mbox[dev]->parm1 = -(EIO);
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      if ((appl_wait_flag.flags & WK_SLEEP))
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        {
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          appl_wait_flag.flags = WK_WAKEUP;
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          module_wake_up (&appl_proc);
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        };
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    }
75 
 
76 
  pmgr_opened[dev] = 0;
77 
}
78 
 
79 
int
80 
pmgr_read (int dev, struct fileinfo *file, char *buf, int count)
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{
82 
  unsigned long   flags;
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  int             ok = 0;
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85 
  if (count != sizeof (struct patmgr_info))
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    {
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      printk ("PATMGR%d: Invalid read count\n", dev);
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      return -(EIO);
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    }
90 
 
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  while (!ok && !current_got_fatal_signal ())
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    {
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      save_flags (flags);
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      cli ();
95 
 
96 
      while (!(mbox[dev] && msg_direction[dev] == A_TO_S) &&
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             !current_got_fatal_signal ())
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        {
99 
 
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          server_wait_flag[dev].flags = WK_SLEEP;
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          module_interruptible_sleep_on (&server_procs[dev]);
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          server_wait_flag[dev].flags &= ~WK_SLEEP;;
103 
        }
104 
 
105 
      if (mbox[dev] && msg_direction[dev] == A_TO_S)
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        {
107 
          memcpy_tofs (&(buf)[0], (char *) mbox[dev], count);
108 
          msg_direction[dev] = 0;
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          ok = 1;
110 
        }
111 
 
112 
      restore_flags (flags);
113 
 
114 
    }
115 
 
116 
  if (!ok)
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    return -(EINTR);
118 
  return count;
119 
}
120 
 
121 
int
122 
pmgr_write (int dev, struct fileinfo *file, const char *buf, int count)
123 
{
124 
  unsigned long   flags;
125 
 
126 
  if (count < 4)
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    {
128 
      printk ("PATMGR%d: Write count < 4\n", dev);
129 
      return -(EIO);
130 
    }
131 
 
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  memcpy_fromfs ((char *) mbox[dev], &(buf)[0], 4);
133 
 
134 
  if (*(unsigned char *) mbox[dev] == SEQ_FULLSIZE)
135 
    {
136 
      int             tmp_dev;
137 
 
138 
      tmp_dev = ((unsigned short *) mbox[dev])[2];
139 
      if (tmp_dev != dev)
140 
        return -(ENXIO);
141 
 
142 
      return synth_devs[dev]->load_patch (dev, *(unsigned short *) mbox[dev],
143 
                                          buf, 4, count, 1);
144 
    }
145 
 
146 
  if (count != sizeof (struct patmgr_info))
147 
    {
148 
      printk ("PATMGR%d: Invalid write count\n", dev);
149 
      return -(EIO);
150 
    }
151 
 
152 
  /*
153 
   * If everything went OK, there should be a preallocated buffer in the
154 
   * mailbox and a client waiting.
155 
   */
156 
 
157 
  save_flags (flags);
158 
  cli ();
159 
 
160 
  if (mbox[dev] && !msg_direction[dev])
161 
    {
162 
      memcpy_fromfs (&((char *) mbox[dev])[4], &(buf)[4], count - 4);
163 
      msg_direction[dev] = S_TO_A;
164 
 
165 
      if ((appl_wait_flag.flags & WK_SLEEP))
166 
        {
167 
          {
168 
            appl_wait_flag.flags = WK_WAKEUP;
169 
            module_wake_up (&appl_proc);
170 
          };
171 
        }
172 
    }
173 
 
174 
  restore_flags (flags);
175 
 
176 
  return count;
177 
}
178 
 
179 
int
180 
pmgr_access (int dev, struct patmgr_info *rec)
181 
{
182 
  unsigned long   flags;
183 
  int             err = 0;
184 
 
185 
  save_flags (flags);
186 
  cli ();
187 
 
188 
  if (mbox[dev])
189 
    printk ("  PATMGR: Server %d mbox full. Why?\n", dev);
190 
  else
191 
    {
192 
      rec->key = PM_K_COMMAND;
193 
      mbox[dev] = rec;
194 
      msg_direction[dev] = A_TO_S;
195 
 
196 
      if ((server_wait_flag[dev].flags & WK_SLEEP))
197 
        {
198 
          {
199 
            server_wait_flag[dev].flags = WK_WAKEUP;
200 
            module_wake_up (&server_procs[dev]);
201 
          };
202 
        }
203 
 
204 
 
205 
      appl_wait_flag.flags = WK_SLEEP;
206 
      module_interruptible_sleep_on (&appl_proc);
207 
      appl_wait_flag.flags &= ~WK_SLEEP;;
208 
 
209 
      if (msg_direction[dev] != S_TO_A)
210 
        {
211 
          rec->key = PM_ERROR;
212 
          rec->parm1 = -(EIO);
213 
        }
214 
      else if (rec->key == PM_ERROR)
215 
        {
216 
          err = rec->parm1;
217 
          if (err > 0)
218 
            err = -err;
219 
        }
220 
 
221 
      mbox[dev] = NULL;
222 
      msg_direction[dev] = 0;
223 
    }
224 
 
225 
  restore_flags (flags);
226 
 
227 
  return err;
228 
}
229 
 
230 
int
231 
pmgr_inform (int dev, int event, unsigned long p1, unsigned long p2,
232 
             unsigned long p3, unsigned long p4)
233 
{
234 
  unsigned long   flags;
235 
  int             err = 0;
236 
 
237 
  struct patmgr_info *tmp_mbox;
238 
 
239 
  if (!pmgr_opened[dev])
240 
    return 0;
241 
 
242 
  tmp_mbox = (struct patmgr_info *) vmalloc (sizeof (struct patmgr_info));
243 
 
244 
  if (tmp_mbox == NULL)
245 
    {
246 
      printk ("pmgr: Couldn't allocate memory for a message\n");
247 
      return 0;
248 
    }
249 
 
250 
  save_flags (flags);
251 
  cli ();
252 
 
253 
  if (mbox[dev])
254 
    printk ("  PATMGR: Server %d mbox full. Why?\n", dev);
255 
  else
256 
    {
257 
 
258 
      mbox[dev] = tmp_mbox;
259 
      mbox[dev]->key = PM_K_EVENT;
260 
      mbox[dev]->command = event;
261 
      mbox[dev]->parm1 = p1;
262 
      mbox[dev]->parm2 = p2;
263 
      mbox[dev]->parm3 = p3;
264 
      msg_direction[dev] = A_TO_S;
265 
 
266 
      if ((server_wait_flag[dev].flags & WK_SLEEP))
267 
        {
268 
          {
269 
            server_wait_flag[dev].flags = WK_WAKEUP;
270 
            module_wake_up (&server_procs[dev]);
271 
          };
272 
        }
273 
 
274 
 
275 
      appl_wait_flag.flags = WK_SLEEP;
276 
      module_interruptible_sleep_on (&appl_proc);
277 
      appl_wait_flag.flags &= ~WK_SLEEP;;
278 
      mbox[dev] = NULL;
279 
      msg_direction[dev] = 0;
280 
    }
281 
 
282 
  restore_flags (flags);
283 
  vfree (tmp_mbox);
284 
 
285 
  return err;
286 
}
287 
 
288 
#endif

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