445 lines
9.0 KiB
C
445 lines
9.0 KiB
C
/*
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* sound/sound_switch.c
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*
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* The system call switch
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*
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* Copyright by Hannu Savolainen 1993
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer. 2.
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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*/
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#include "sound_config.h"
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#ifdef CONFIGURE_SOUNDCARD
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struct sbc_device
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{
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int usecount;
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};
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static struct sbc_device sbc_devices[SND_NDEVS] =
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{
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{0}};
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static int in_use = 0; /* Total # of open device files (excluding
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* minor 0) */
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/*
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* /dev/sndstatus -device
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*/
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static char *status_buf = NULL;
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static int status_len, status_ptr;
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static int status_busy = 0;
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static int
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put_status (char *s)
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{
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int l;
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for (l = 0; l < 256, s[l]; l++); /* l=strlen(s); */
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if (status_len + l >= 4000)
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return 0;
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memcpy (&status_buf[status_len], s, l);
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status_len += l;
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return 1;
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}
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static int
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put_status_int (unsigned int val, int radix)
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{
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int l, v;
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static char hx[] = "0123456789abcdef";
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char buf[11];
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if (!val)
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return put_status ("0");
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l = 0;
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buf[10] = 0;
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while (val)
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{
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v = val % radix;
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val = val / radix;
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buf[9 - l] = hx[v];
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l++;
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}
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if (status_len + l >= 4000)
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return 0;
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memcpy (&status_buf[status_len], &buf[10 - l], l);
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status_len += l;
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return 1;
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}
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static void
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init_status (void)
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{
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/*
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* Write the status information to the status_buf and update status_len.
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* There is a limit of 4000 bytes for the data.
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*/
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int i;
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status_ptr = 0;
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put_status ("Sound Driver:" SOUND_VERSION_STRING
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" (" SOUND_CONFIG_DATE " " SOUND_CONFIG_BY "@"
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SOUND_CONFIG_HOST "." SOUND_CONFIG_DOMAIN ")"
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"\n");
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if (!put_status ("Config options: "))
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return;
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if (!put_status_int (SELECTED_SOUND_OPTIONS, 16))
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return;
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if (!put_status ("\n\nHW config: \n"))
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return;
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for (i = 0; i < (num_sound_drivers - 1); i++)
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{
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if (!supported_drivers[i].enabled)
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if (!put_status ("("))
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return;
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if (!put_status ("Type "))
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return;
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if (!put_status_int (supported_drivers[i].card_type, 10))
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return;
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if (!put_status (": "))
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return;
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if (!put_status (supported_drivers[i].name))
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return;
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if (!put_status (" at 0x"))
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return;
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if (!put_status_int (supported_drivers[i].config.io_base, 16))
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return;
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if (!put_status (" irq "))
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return;
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if (!put_status_int (supported_drivers[i].config.irq, 10))
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return;
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if (!put_status (" drq "))
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return;
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if (!put_status_int (supported_drivers[i].config.dma, 10))
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return;
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if (!supported_drivers[i].enabled)
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if (!put_status (")"))
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return;
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if (!put_status ("\n"))
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return;
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}
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if (!put_status ("\nPCM devices:\n"))
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return;
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for (i = 0; i < num_dspdevs; i++)
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{
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if (!put_status_int (i, 10))
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return;
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if (!put_status (": "))
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return;
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if (!put_status (dsp_devs[i]->name))
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return;
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if (!put_status ("\n"))
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return;
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}
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if (!put_status ("\nSynth devices:\n"))
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return;
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for (i = 0; i < num_synths; i++)
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{
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if (!put_status_int (i, 10))
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return;
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if (!put_status (": "))
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return;
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if (!put_status (synth_devs[i]->info->name))
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return;
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if (!put_status ("\n"))
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return;
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}
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if (!put_status ("\nMidi devices:\n"))
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return;
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for (i = 0; i < num_midis; i++)
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{
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if (!put_status_int (i, 10))
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return;
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if (!put_status (": "))
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return;
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if (!put_status (midi_devs[i]->info.name))
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return;
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if (!put_status ("\n"))
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return;
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}
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if (num_mixers)
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{
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if (!put_status ("\nMixer(s) installed\n"))
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return;
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}
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else
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{
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if (!put_status ("\nNo mixers installed\n"))
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return;
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}
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}
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static int
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read_status (snd_rw_buf * buf, int count)
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{
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/*
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* Return at most 'count' bytes from the status_buf.
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*/
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int l, c;
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l = count;
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c = status_len - status_ptr;
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if (l > c)
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l = c;
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if (l <= 0)
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return 0;
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COPY_TO_USER (buf, 0, &status_buf[status_ptr], l);
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status_ptr += l;
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return l;
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}
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int
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sound_read_sw (int dev, struct fileinfo *file, snd_rw_buf * buf, int count)
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{
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DEB (printk ("sound_read_sw(dev=%d, count=%d)\n", dev, count));
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switch (dev & 0x0f)
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{
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case SND_DEV_STATUS:
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return read_status (buf, count);
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break;
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case SND_DEV_DSP:
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case SND_DEV_DSP16:
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case SND_DEV_AUDIO:
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return audio_read (dev, file, buf, count);
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break;
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case SND_DEV_SEQ:
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return sequencer_read (dev, file, buf, count);
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break;
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#ifndef EXCLUDE_MPU401
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case SND_DEV_MIDIN:
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return MIDIbuf_read (dev, file, buf, count);
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#endif
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default:
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printk ("Sound: Undefined minor device %d\n", dev);
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}
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return RET_ERROR (EPERM);
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}
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int
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sound_write_sw (int dev, struct fileinfo *file, snd_rw_buf * buf, int count)
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{
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DEB (printk ("sound_write_sw(dev=%d, count=%d)\n", dev, count));
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switch (dev & 0x0f)
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{
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case SND_DEV_SEQ:
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return sequencer_write (dev, file, buf, count);
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break;
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case SND_DEV_DSP:
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case SND_DEV_DSP16:
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case SND_DEV_AUDIO:
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return audio_write (dev, file, buf, count);
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break;
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default:
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return RET_ERROR (EPERM);
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}
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return count;
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}
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int
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sound_open_sw (int dev, struct fileinfo *file)
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{
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int retval;
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DEB (printk ("sound_open_sw(dev=%d) : usecount=%d\n", dev, sbc_devices[dev].usecount));
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if ((dev >= SND_NDEVS) || (dev < 0))
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{
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printk ("Invalid minor device %d\n", dev);
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return RET_ERROR (ENXIO);
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}
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switch (dev & 0x0f)
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{
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case SND_DEV_STATUS:
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if (status_busy)
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return RET_ERROR (EBUSY);
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status_busy = 1;
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if ((status_buf = (char *) KERNEL_MALLOC (4000)) == NULL)
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return RET_ERROR (EIO);
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status_len = status_ptr = 0;
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init_status ();
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break;
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case SND_DEV_CTL:
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return 0;
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break;
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case SND_DEV_SEQ:
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if ((retval = sequencer_open (dev, file)) < 0)
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return retval;
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break;
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#ifndef EXCLUDE_MPU401
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case SND_DEV_MIDIN:
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if ((retval = MIDIbuf_open (dev, file)) < 0)
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return retval;
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break;
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#endif
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case SND_DEV_DSP:
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case SND_DEV_DSP16:
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case SND_DEV_AUDIO:
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if ((retval = audio_open (dev, file)) < 0)
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return retval;
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break;
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default:
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printk ("Invalid minor device %d\n", dev);
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return RET_ERROR (ENXIO);
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}
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sbc_devices[dev].usecount++;
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in_use++;
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return 0;
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}
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void
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sound_release_sw (int dev, struct fileinfo *file)
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{
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DEB (printk ("sound_release_sw(dev=%d)\n", dev));
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switch (dev & 0x0f)
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{
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case SND_DEV_STATUS:
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if (status_buf)
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KERNEL_FREE (status_buf);
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status_buf = NULL;
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status_busy = 0;
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break;
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case SND_DEV_CTL:
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break;
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case SND_DEV_SEQ:
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sequencer_release (dev, file);
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break;
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#ifndef EXCLUDE_MPU401
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case SND_DEV_MIDIN:
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MIDIbuf_release (dev, file);
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break;
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#endif
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case SND_DEV_DSP:
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case SND_DEV_DSP16:
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case SND_DEV_AUDIO:
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audio_release (dev, file);
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break;
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default:
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printk ("Sound error: Releasing unknown device 0x%02x\n", dev);
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}
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sbc_devices[dev].usecount--;
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in_use--;
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}
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int
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sound_ioctl_sw (int dev, struct fileinfo *file,
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unsigned int cmd, unsigned long arg)
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{
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DEB (printk ("sound_ioctl_sw(dev=%d, cmd=0x%x, arg=0x%x)\n", dev, cmd, arg));
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switch (dev & 0x0f)
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{
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case SND_DEV_CTL:
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if (!num_mixers)
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return RET_ERROR (ENXIO);
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if ((dev >> 4) >= num_mixers)
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return RET_ERROR (ENXIO);
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return mixer_devs[dev >> 4]->ioctl (dev >> 4, cmd, arg);
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break;
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case SND_DEV_SEQ:
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return sequencer_ioctl (dev, file, cmd, arg);
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break;
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case SND_DEV_DSP:
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case SND_DEV_DSP16:
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case SND_DEV_AUDIO:
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return audio_ioctl (dev, file, cmd, arg);
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break;
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#ifndef EXCLUDE_MPU401
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case SND_DEV_MIDIN:
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return MIDIbuf_ioctl (dev, file, cmd, arg);
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break;
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#endif
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default:
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return RET_ERROR (EPERM);
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break;
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}
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return RET_ERROR (EPERM);
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}
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#endif
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