f73cefd412
it returns time in microseconds instead of HZ (feel difference!) 2) change GET_TIME type to unsigned long in all places to prevent overflow
430 lines
9.5 KiB
C
430 lines
9.5 KiB
C
/*
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* sound/386bsd/soundcard.c
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*
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* Soundcard driver for FreeBSD.
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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
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation 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
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER 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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#include "dev_table.h"
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u_int snd1mask;
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u_int snd2mask;
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u_int snd3mask;
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u_int snd4mask;
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u_int snd5mask;
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u_int snd6mask;
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u_int snd7mask;
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u_int snd8mask;
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u_int snd9mask;
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#define FIX_RETURN(ret) {if ((ret)<0) return -(ret); else return 0;}
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static int timer_running = 0;
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static int soundcards_installed = 0; /* Number of installed
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* soundcards */
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static int soundcard_configured = 0;
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extern char *snd_raw_buf[MAX_DSP_DEV][DSP_BUFFCOUNT];
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extern unsigned long snd_raw_buf_phys[MAX_DSP_DEV][DSP_BUFFCOUNT];
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extern int snd_raw_count[MAX_DSP_DEV];
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static struct fileinfo files[SND_NDEVS];
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int sndprobe (struct isa_device *dev);
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int sndattach (struct isa_device *dev);
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int sndopen (dev_t dev, int flags);
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int sndclose (dev_t dev, int flags);
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int sndioctl (dev_t dev, int cmd, caddr_t arg, int mode);
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int sndread (int dev, struct uio *uio);
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int sndwrite (int dev, struct uio *uio);
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int sndselect (int dev, int rw);
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static void sound_mem_init(void);
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unsigned
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long
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get_time()
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{
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extern struct timeval time;
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struct timeval timecopy;
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int x = splclock();
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timecopy = time;
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splx(x);
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return ((unsigned long)timecopy.tv_usec*HZ)/1000000 +
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(unsigned long)timecopy.tv_sec*HZ;
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}
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int
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sndread (int dev, struct uio *buf)
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{
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int count = buf->uio_resid;
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dev = minor (dev);
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FIX_RETURN (sound_read_sw (dev, &files[dev], buf, count));
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}
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int
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sndwrite (int dev, struct uio *buf)
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{
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int count = buf->uio_resid;
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dev = minor (dev);
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FIX_RETURN (sound_write_sw (dev, &files[dev], buf, count));
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}
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int
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sndopen (dev_t dev, int flags)
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{
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int retval;
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dev = minor (dev);
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if (!soundcard_configured && dev)
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{
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printk ("SoundCard Error: The soundcard system has not been configured\n");
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FIX_RETURN (-ENODEV);
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}
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files[dev].mode = 0;
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if (flags & FREAD && flags & FWRITE)
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files[dev].mode = OPEN_READWRITE;
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else if (flags & FREAD)
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files[dev].mode = OPEN_READ;
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else if (flags & FWRITE)
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files[dev].mode = OPEN_WRITE;
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FIX_RETURN(sound_open_sw (dev, &files[dev]));
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}
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int
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sndclose (dev_t dev, int flags)
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{
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dev = minor (dev);
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sound_release_sw(dev, &files[dev]);
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FIX_RETURN (0);
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}
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int
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sndioctl (dev_t dev, int cmd, caddr_t arg, int mode)
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{
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dev = minor (dev);
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FIX_RETURN (sound_ioctl_sw (dev, &files[dev], cmd, (unsigned int) arg));
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}
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int
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sndselect (int dev, int rw)
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{
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dev = minor (dev);
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DEB (printk ("sound_ioctl(dev=%d, cmd=0x%x, arg=0x%x)\n", dev, cmd, arg));
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FIX_RETURN (0);
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}
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static unsigned short
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ipri_to_irq (unsigned short ipri)
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{
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/*
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* Converts the ipri (bitmask) to the corresponding irq number
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*/
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int irq;
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for (irq = 0; irq < 16; irq++)
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if (ipri == (1 << irq))
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return irq;
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return -1; /* Invalid argument */
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}
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int
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sndprobe (struct isa_device *dev)
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{
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struct address_info hw_config;
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hw_config.io_base = dev->id_iobase;
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hw_config.irq = ipri_to_irq (dev->id_irq);
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hw_config.dma = dev->id_drq;
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return sndtable_probe (dev->id_unit, &hw_config);
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}
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int
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sndattach (struct isa_device *dev)
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{
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int i;
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static int dsp_initialized = 0;
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static int midi_initialized = 0;
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static int seq_initialized = 0;
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static int generic_midi_initialized = 0;
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unsigned long mem_start = 0xefffffffUL;
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struct address_info hw_config;
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hw_config.io_base = dev->id_iobase;
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hw_config.irq = ipri_to_irq (dev->id_irq);
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hw_config.dma = dev->id_drq;
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if (dev->id_unit) /* Card init */
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if (!sndtable_init_card (dev->id_unit, &hw_config))
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{
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printf (" <Driver not configured>");
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return FALSE;
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}
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/*
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* Init the high level sound driver
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*/
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if (!(soundcards_installed = sndtable_get_cardcount ()))
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{
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printf (" <No such hardware>");
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return FALSE; /* No cards detected */
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}
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printf("\n");
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#ifndef EXCLUDE_AUDIO
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soundcard_configured = 1;
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if (num_dspdevs)
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sound_mem_init ();
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#endif
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if (num_dspdevs && !dsp_initialized) /* Audio devices present */
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{
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dsp_initialized = 1;
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mem_start = DMAbuf_init (mem_start);
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mem_start = audio_init (mem_start);
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}
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/** UWM stuff **/
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#ifndef EXCLUDE_CHIP_MIDI
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if (!generic_midi_initialized)
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{
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generic_midi_initialized = 1;
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mem_start = CMIDI_init (mem_start);
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}
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#endif
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#ifndef EXCLUDE_MPU401
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if (num_midis && !midi_initialized)
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{
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midi_initialized = 1;
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mem_start = MIDIbuf_init (mem_start);
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}
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#endif
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if ((num_midis + num_synths) && !seq_initialized)
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{
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seq_initialized = 1;
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mem_start = sequencer_init (mem_start);
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}
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return TRUE;
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}
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void
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tenmicrosec (void)
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{
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int i;
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for (i = 0; i < 16; i++)
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inb (0x80);
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}
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#ifdef EXCLUDE_GUS
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void
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gusintr (int unit)
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{
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return;
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}
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#endif
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void
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request_sound_timer (int count)
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{
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static int current = 0;
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int tmp = count;
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if (count < 0)
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timeout ((timeout_func_t)sequencer_timer, 0, -count);
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else
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{
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if (count < current)
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current = 0; /* Timer restarted */
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count = count - current;
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current = tmp;
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if (!count)
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count = 1;
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timeout ((timeout_func_t)sequencer_timer, 0, count);
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}
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timer_running = 1;
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}
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void
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sound_stop_timer (void)
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{
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if (timer_running)
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untimeout ((timeout_func_t)sequencer_timer, 0);
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timer_running = 0;
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}
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#ifndef EXCLUDE_AUDIO
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static void
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sound_mem_init (void)
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{
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int i, dev;
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unsigned long dma_pagesize;
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static unsigned long dsp_init_mask = 0;
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for (dev = 0; dev < num_dspdevs; dev++) /* Enumerate devices */
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if (!(dsp_init_mask & (1 << dev))) /* Not already done */
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if (sound_buffcounts[dev] > 0 && sound_dsp_dmachan[dev] > 0)
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{
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dsp_init_mask |= (1 << dev);
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#if 1 /* 0 */
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if (sound_dma_automode[dev])
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{
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sound_dma_automode[dev] = 0; /* Not possible with FreeBSD */
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}
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if (sound_buffcounts[dev] == 1)
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{
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sound_buffcounts[dev] = 2;
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sound_buffsizes[dev] /= 2;
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}
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if (sound_buffsizes[dev] > 65536) /* Larger is not possible (yet) */
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sound_buffsizes[dev] = 65536;
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#if 0
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if (sound_dsp_dmachan[dev] > 3 && sound_buffsizes[dev] > 65536)
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dma_pagesize = 131072; /* 128k */
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else
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dma_pagesize = 65536;
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#else
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dma_pagesize = 4096; /* use bounce buffer */
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#endif
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/* More sanity checks */
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if (sound_buffsizes[dev] > dma_pagesize)
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sound_buffsizes[dev] = dma_pagesize;
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sound_buffsizes[dev] &= ~0xfff; /* Truncate to n*4k */
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if (sound_buffsizes[dev] < 4096)
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sound_buffsizes[dev] = 4096;
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#else
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dma_pagesize = 4096;
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sound_buffsizes[dev] = 4096;
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sound_buffcounts[dev] = 16; /* -> 64k */
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#endif
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/* Now allocate the buffers */
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for (snd_raw_count[dev] = 0; snd_raw_count[dev] < sound_buffcounts[dev]; snd_raw_count[dev]++)
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{
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/*
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* The DMA buffer allocation algorithm hogs memory. We allocate
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* a memory area which is two times the requires size. This
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* guarantees that it contains at least one valid DMA buffer.
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*
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* This really needs some kind of finetuning.
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*/
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char *tmpbuf = malloc (2*sound_buffsizes[dev], M_DEVBUF, M_NOWAIT);
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unsigned long addr, rounded;
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if (tmpbuf == NULL)
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{
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printk ("snd: Unable to allocate %d bytes of buffer\n",
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2 * sound_buffsizes[dev]);
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return;
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}
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addr = kvtop (tmpbuf);
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/*
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* Align the start address
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*/
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rounded = (addr & ~(dma_pagesize - 1)) + dma_pagesize;
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snd_raw_buf[dev][snd_raw_count[dev]] =
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&tmpbuf[rounded - addr]; /* Compute offset */
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/*
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* Use virtual address as the physical address, since
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* isa_dmastart performs the phys address computation.
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*/
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snd_raw_buf_phys[dev][snd_raw_count[dev]] =
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(unsigned long) snd_raw_buf[dev][snd_raw_count[dev]];
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}
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} /* for dev */
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}
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#endif
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struct isa_driver snddriver =
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{sndprobe, sndattach, "snd"};
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int
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snd_ioctl_return (int *addr, int value)
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{
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if (value < 0)
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return value; /* Error */
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suword (addr, value);
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return 0;
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}
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int
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snd_set_irq_handler (int interrupt_level, void(*hndlr)(int))
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{
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return 1;
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}
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void
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snd_release_irq(int vect)
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{
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}
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#endif
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