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NetBSD/sys/arch/arm32/vidc/vidcaudio.c

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/* $NetBSD: vidcaudio.c,v 1.1 1996/01/31 23:25:06 mark Exp $ */
/*
* Copyright (c) 1995 Melvin Tang-Richardson
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the RiscBSD team.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: vidcaudio.c,v 1.1 1996/01/31 23:25:06 mark Exp $
*/
/*
* vidcaudio driver for RiscBSD by Melvin Tang-Richardson (c) 1995
*
* Interfaces with the NetBSD generic audio driver to provide SUN
* /dev/audio (partial) compatibility.
*
* Do not include me in conf.c. My interface is done by the generic
* audio driver. Put me in config file and files.arm32. Do not put
* the audio.c generic driver in them. I do the autoconfig for it.
*
* The following files need to be altered
*
* [files.arm32]
* device vidcaudio at mainbus :audio
* file arch/arm32/mainbus/vidcaudio.c vidcaudio needs-flag
* major { audio=36 }
*
* [conf.c]
* #include "audio.h"
* cdev_decl(audio)
*
* cdev_audio_init(NAUDIO,audio) /* 36: generic audio I/O */
*
* [GENERIC]
* vidcaudio0 at mainbus? base 0x00000000
*
*/
#include <sys/param.h> /* proc.h */
#include <sys/types.h> /* dunno */
#include <sys/conf.h> /* autoconfig functions */
#include <sys/device.h> /* device calls */
#include <sys/proc.h> /* device calls */
#include <sys/audioio.h>
#include <sys/errno.h>
#include <sys/systm.h>
#include <vm/vm.h>
#include <vm/vm_kern.h>
#include <dev/audio_if.h>
#include <machine/irqhandler.h>
#include <machine/iomd.h>
#include <machine/vidc.h>
#include <machine/katelib.h> /* ReadByte etc. */
#include <arm32/mainbus/mainbus.h>
#include "waveform.h"
#include "vidcaudio.h"
#undef DEBUG
struct vidcaudio_softc;
/* Note to Nut - ideally these should use the __P() macro to match the kernel style guide for prototypes.
* Another niggle ... the function declartions need modifying to match the kernel style as well.
* I have notfinished doing it too all my stuff yet... :-(
*/
int vidcaudio_intr ( void *arg );
int vidcaudio_dma_program ( vm_offset_t cur, vm_offset_t end,
void (*intr)(), void *arg );
void vidcaudio_dummy_routine ( void *arg );
int vidcaudio_stereo ( int channel, int position );
int vidcaudio_rate ( int rate );
void vidcaudio_shutdown ( void );
int vidcaudio_hw_attach ( struct vidcaudio_softc *sc );
struct audio_general {
int in_sr;
int out_sr;
vm_offset_t silence;
irqhandler_t ih;
void (*intr) ();
void *arg;
vm_offset_t next_cur;
vm_offset_t next_end;
void (*next_intr) ();
void *next_arg;
int buffer;
int in_progress;
int open;
} ag;
/* ************************************************************************* *
| Compatibility with /dev/beep |
* ************************************************************************* */
void vidcaudio_beep_generate ( void )
{
vidcaudio_dma_program ( ag.silence, ag.silence+sizeof(beep_waveform)-16,
vidcaudio_dummy_routine, NULL );
}
/* ************************************************************************* *
| Kernel interface for the autoconfiguration |
* ************************************************************************* */
struct vidcaudio_softc {
struct device device;
int iobase;
int open;
u_int encoding;
int inport;
int outport;
};
int vidcaudio_probe ( struct device *parent, struct device *match, void *aux );
void vidcaudio_attach( struct device *parent, struct device *self, void *aux );
int vidcaudio_open ( dev_t dev, int flags );
void vidcaudio_close ( void *addr );
struct cfdriver vidcaudiocd = {
NULL, "vidcaudio", vidcaudio_probe, vidcaudio_attach,
DV_DULL, sizeof(struct vidcaudio_softc)
};
int vidcaudio_probe ( struct device *parent, struct device *match, void *aux )
{
int id = ReadByte(IOMD_ID0) | ReadByte(IOMD_ID1)>>8;
switch ( id )
{
case RPC600_IOMD_ID:
return (1);
}
return (0);
}
void vidcaudio_attach ( struct device *parent, struct device *self, void *aux )
{
struct mainbus_attach_args *mb = aux;
struct vidcaudio_softc *sc = (void *)self;
sc->iobase = mb->mb_iobase;
sc->open = 0;
sc->encoding = 0;
sc->inport = 0;
sc->outport = 0;
ag.in_sr = 24*1024;
ag.out_sr = 24*1024;
ag.in_progress = 0;
ag.next_cur = 0;
ag.next_end = 0;
ag.next_intr = NULL;
ag.next_arg = NULL;
vidcaudio_rate ( 32 );
/* Program the silence buffer and reset the DMA channel */
ag.silence = kmem_alloc(kernel_map, NBPG);
bzero ( (char *)ag.silence, NBPG );
bcopy ( (char *)beep_waveform, (char *)ag.silence, sizeof(beep_waveform) );
ag.buffer = 0;
/* Install the irq handler for the DMA interrupt */
ag.ih.ih_func = vidcaudio_intr;
ag.ih.ih_arg = NULL;
ag.ih.ih_level = IPL_NONE;
ag.intr = NULL;
ag.intr = NULL;
disable_irq ( IRQ_DMASCH0 );
if ( irq_claim(IRQ_DMASCH0, &(ag.ih)) == -1 )
panic ( "vidcaudio: couldn't claim IRQ_DMASCH0" );
disable_irq ( IRQ_DMASCH0 );
vidcaudio_dma_program ( ag.silence, ag.silence+NBPG-16,
vidcaudio_dummy_routine, NULL );
vidcaudio_hw_attach ( sc );
#ifdef DEBUG
printf ( " UNDER DEVELOPMENT (nuts)\n" );
#endif
}
int vidcaudio_open ( dev_t dev, int flags )
{
struct vidcaudio_softc *sc;
int unit = AUDIOUNIT (dev);
int s;
#ifdef DEBUG
printf ( "DEBUG: vidcaudio_open called\n" );
#endif
if ( unit >= vidcaudiocd.cd_ndevs )
return ENODEV;
sc = vidcaudiocd.cd_devs[unit];
if (!sc)
return ENXIO;
s = splhigh ();
if ( sc->open!=0 )
return EBUSY;
sc->open=1;
ag.open=1;
(void)splx(s);
return 0;
}
void vidcaudio_close ( void *addr )
{
struct vidcaudio_softc *sc = addr;
vidcaudio_shutdown ();
#ifdef DEBUG
printf ( "DEBUG: vidcaudio_close called\n" );
#endif
sc->open = 0;
ag.open = 0;
}
/* ************************************************************************* *
| Interface to the generic audio driver |
* ************************************************************************* */
int vidcaudio_set_in_sr ( void *, u_long );
u_long vidcaudio_get_in_sr ( void * );
int vidcaudio_set_out_sr ( void *, u_long );
u_long vidcaudio_get_out_sr ( void * );
int vidcaudio_query_encoding ( void *, struct audio_encoding * );
int vidcaudio_set_encoding ( void *, u_int );
int vidcaudio_get_encoding ( void * );
int vidcaudio_set_precision ( void *, u_int );
int vidcaudio_getprecision ( void * );
int vidcaudio_set_channels ( void *, int );
int vidcaudio_get_channels ( void * );
int vidcaudio_round_blocksize ( void *, int );
int vidcaudio_set_out_port ( void *, int );
int vidcaudio_get_out_port ( void * );
int vidcaudio_set_in_port ( void *, int );
int vidcaudio_get_in_port ( void * );
int vidcaudio_commit_settings ( void * );
u_int vidcaudio_get_silence ( int );
void vidcaudio_sw_encode ( int, u_char *, int );
void vidcaudio_sw_decode ( int, u_char *, int );
int vidcaudio_start_output ( void *, void *, int, void (*)(), void *);
int vidcaudio_start_input ( void *, void *, int, void (*)(), void *);
int vidcaudio_halt_output ( void * );
int vidcaudio_halt_input ( void * );
int vidcaudio_cont_output ( void * );
int vidcaudio_cont_input ( void * );
int vidcaudio_speaker_ctl ( void *, int );
int vidcaudio_getdev ( void *, struct audio_device * );
int vidcaudio_setfd ( void *, int );
int vidcaudio_set_port ( void *, mixer_ctrl_t * );
int vidcaudio_get_port ( void *, mixer_ctrl_t * );
int vidcaudio_query_devinfo ( void *, mixer_devinfo_t * );
struct audio_device vidcaudio_device = {
"VidcAudio 8-bit",
"x",
"vidcaudio"
};
int vidcaudio_set_in_sr ( void *addr, u_long sr )
{
ag.in_sr = sr;
return 0;
}
u_long vidcaudio_get_in_sr ( void *addr )
{
return ag.in_sr;
}
int vidcaudio_set_out_sr ( void *addr, u_long sr )
{
ag.out_sr = sr;
return 0;
}
u_long vidcaudio_get_out_sr ( void *addr )
{
return ( ag.out_sr );
}
int vidcaudio_query_encoding ( void *addr, struct audio_encoding *fp )
{
switch ( fp->index )
{
case 0:
strcpy (fp->name, "vidc" );
fp->format_id = AUDIO_ENCODING_ULAW;
break;
default:
return (EINVAL);
}
return 0;
}
int vidcaudio_set_encoding ( void *addr, u_int enc )
{
struct vidcaudio_softc *sc = addr;
switch (enc)
{
case AUDIO_ENCODING_ULAW:
#ifdef DEBUG
printf ( "DEBUG: Set ulaw encoding\n" );
#endif
sc->encoding = enc;
break;
default:
return (EINVAL);
}
return 0;
}
int vidcaudio_get_encoding ( void *addr )
{
struct vidcaudio_softc *sc = addr;
return sc->encoding;
}
int vidcaudio_set_precision ( void *addr, u_int prec )
{
if (prec != 8)
return EINVAL;
return 0;
}
int vidcaudio_get_precision ( void *addr )
{
return (8);
}
int vidcaudio_set_channels ( void *addr, int chans )
{
if ( chans!=1 )
return EINVAL;
return 0;
}
int vidcaudio_get_channels ( void *addr )
{
return 1;
}
int vidcaudio_round_blocksize ( void *addr, int blk )
{
if (blk>NBPG) blk=NBPG;
return blk;
}
int vidcaudio_set_out_port ( void *addr, int port )
{
struct vidcaudio_softc *sc = addr;
sc->outport = port;
return 0;
}
int vidcaudio_get_out_port ( void *addr )
{
struct vidcaudio_softc *sc = addr;
return sc->outport;
}
int vidcaudio_set_in_port ( void *addr, int port )
{
struct vidcaudio_softc *sc = addr;
sc->inport = port;
return 0;
}
int vidcaudio_get_in_port ( void *addr )
{
struct vidcaudio_softc *sc = addr;
return sc->inport;
}
int vidcaudio_commit_settings ( void *addr )
{
#ifdef DEBUG
printf ( "DEBUG: committ_settings\n" );
#endif
return 0;
}
u_int vidcaudio_get_silence ( int enc )
{
switch (enc)
{
case AUDIO_ENCODING_ULAW:
return 0x7f;
default:
return 0;
}
return 0;
}
void vidcaudio_sw_encode ( int e, u_char *p, int cc )
{
#ifdef DEBUG
printf ( "DEBUG: sw_encode\n" );
#endif
return;
}
void vidcaudio_sw_decode ( int e, u_char *p, int cc )
{
#ifdef DEBUG
printf ( "DEBUG: sw_decode\n" );
#endif
}
#define ROUND(s) ( ((int)s) & (~(NBPG-1)) )
int vidcaudio_start_output ( void *addr, void *p, int cc,
void (*intr)(), void *arg )
{
/* I can only DMA inside 1 page */
#ifdef DEBUG
printf ( "vidcaudio_start_output (%d) %08x %08x\n", cc, intr, arg );
#endif
if ( ROUND(p) != ROUND(p+cc) )
{
/* If it's over a page I can fix it up by copying it into my buffer */
#ifdef DEBUG
printf ( "vidcaudio: DMA over page boundary requested. Fixing up\n" );
#endif
bcopy ( (char *)ag.silence, p, cc>NBPG ? NBPG : cc );
p=(void *)ag.silence;
/* I can't DMA any more than that, but it is possible to fix it up */
/* by handling multiple buffers and only interrupting the audio */
/* driver after sending out all the stuff it gave me. That it more */
/* than I can be bothered to do right now and it probablly wont */
/* happen so I'll just truncate the buffer and tell the user */
if ( cc>NBPG )
{
printf ( "vidcaudio: DMA buffer truncated. I could fix this up\n" );
cc=NBPG;
}
}
vidcaudio_dma_program ( (vm_offset_t)p, (vm_offset_t)(p+cc), intr, arg );
return 0;
}
int vidcaudio_start_input ( void *addr, void *p, int cc,
void (*intr)(), void *arg )
{
return EIO;
}
int vidcaudio_halt_output ( void *addr )
{
#ifdef DEBUG
printf ( "DEBUG: vidcaudio_halt_output\n" );
#endif
return EIO;
}
int vidcaudio_halt_input ( void *addr )
{
#ifdef DEBUG
printf ( "DEBUG: vidcaudio_halt_output\n" );
#endif
return EIO;
}
int vidcaudio_cont_output ( void *addr )
{
#ifdef DEBUG
printf ( "DEBUG: vidcaudio_halt_output\n" );
#endif
return EIO;
}
int vidcaudio_cont_input ( void *addr )
{
#ifdef DEBUG
printf ( "DEBUG: vidcaudio_halt_output\n" );
#endif
return EIO;
}
int vidcaudio_speaker_ctl ( void *addr, int newstate )
{
#ifdef DEBUG
printf ( "DEBUG: vidcaudio_speaker_ctl\n" );
#endif
return 0;
}
int vidcaudio_getdev ( void *addr, struct audio_device *retp )
{
*retp = vidcaudio_device;
return 0;
}
int vidcaudio_setfd ( void *addr, int flag )
{
return ENOTTY;
}
int vidcaudio_set_port ( void *addr, mixer_ctrl_t *cp )
{
return EINVAL;
}
int vidcaudio_get_port ( void *addr, mixer_ctrl_t *cp )
{
return EINVAL;
}
int vidcaudio_query_devinfo ( void *addr, mixer_devinfo_t *dip )
{
return 0;
}
struct audio_hw_if vidcaudio_hw_if = {
vidcaudio_open,
vidcaudio_close,
NULL,
vidcaudio_set_in_sr,
vidcaudio_get_in_sr,
vidcaudio_set_out_sr,
vidcaudio_get_out_sr,
vidcaudio_query_encoding,
vidcaudio_set_encoding,
vidcaudio_get_encoding,
vidcaudio_set_precision,
vidcaudio_get_precision,
vidcaudio_set_channels,
vidcaudio_get_channels,
vidcaudio_round_blocksize,
vidcaudio_set_out_port,
vidcaudio_get_out_port,
vidcaudio_set_in_port,
vidcaudio_get_in_port,
vidcaudio_commit_settings,
vidcaudio_get_silence,
vidcaudio_sw_encode,
vidcaudio_sw_decode,
vidcaudio_start_output,
vidcaudio_start_input,
vidcaudio_halt_output,
vidcaudio_halt_input,
vidcaudio_cont_output,
vidcaudio_cont_input,
vidcaudio_speaker_ctl,
vidcaudio_getdev,
vidcaudio_setfd,
vidcaudio_set_port,
vidcaudio_get_port,
vidcaudio_query_devinfo,
0, /* not full duplex */
0
};
void vidcaudio_dummy_routine ( void *arg )
{
#ifdef DEBUG
printf ( "vidcaudio_dummy_routine\n" );
#endif
}
int vidcaudio_hw_attach ( struct vidcaudio_softc *sc )
{
return ( audio_hardware_attach ( &vidcaudio_hw_if, sc ) );
}
int vidcaudio_rate ( int rate )
{
WriteWord ( VIDC_BASE, VIDC_SFR | rate );
return 0;
}
int vidcaudio_stereo ( int channel, int position )
{
if ( channel<0 ) return EINVAL;
if ( channel>7 ) return EINVAL;
channel = channel<<24 | VIDC_SIR0;
WriteWord ( VIDC_BASE, channel|position );
return 0;
}
#define PHYS(x) (pmap_extract( kernel_pmap, ((x)&PG_FRAME) ))
/*
* Program the next buffer to be used
* This function must be re-entrant, maximum re-entrancy of 2
*/
#define FLAGS (0)
int vidcaudio_dma_program ( vm_offset_t cur, vm_offset_t end,
void (*intr)(), void *arg )
{
/* If there isn't a transfer in progress then start a new one */
if ( ag.in_progress==0 )
{
ag.buffer = 0;
WriteWord ( IOMD_SD0CR, 0x90 ); /* Reset State Machine */
WriteWord ( IOMD_SD0CR, 0x30 ); /* Reset State Machine */
WriteWord ( IOMD_SD0CURB, PHYS(cur) );
WriteWord ( IOMD_SD0ENDB, PHYS(end-16)|FLAGS );
WriteWord ( IOMD_SD0CURA, PHYS(cur) );
WriteWord ( IOMD_SD0ENDA, PHYS(end-16)|FLAGS );
ag.in_progress = 1;
ag.next_cur = ag.next_end = 0;
ag.next_intr = ag.next_arg = 0;
ag.intr = intr;
ag.arg = arg;
/* The driver 'clicks' between buffer swaps, leading me to think */
/* that the fifo is much small than on other sound cards. So */
/* so I'm going to have to do some tricks here */
(*ag.intr)(ag.arg); /* Schedule the next buffer */
ag.intr = vidcaudio_dummy_routine; /* Already done this */
ag.arg = NULL;
#ifdef PRINT
printf ( "vidcaudio: start output\n" );
#endif
#ifdef DEBUG
printf ( "SE" );
#endif
enable_irq ( IRQ_DMASCH0 );
}
else
{
/* Otherwise schedule the next one */
if ( ag.next_cur!=0 )
{
/* If there's one scheduled then complain */
printf ( "vidcaudio: Buffer already Q'ed\n" );
return EIO;
}
else
{
/* We're OK to schedule it now */
ag.buffer = (++ag.buffer) & 1;
ag.next_cur = PHYS(cur);
ag.next_end = PHYS(end-16);
ag.next_intr = intr;
ag.next_arg = arg;
#ifdef DEBUG
printf ( "s" );
#endif
}
}
return 0;
}
void vidcaudio_shutdown ( void )
{
/* Shut down the channel */
ag.intr = NULL;
ag.in_progress = 0;
#ifdef PRINT
printf ( "vidcaudio: stop output\n" );
#endif
WriteWord ( IOMD_SD0CURB, ag.silence );
WriteWord ( IOMD_SD0ENDB, (ag.silence + NBPG - 16) | (1<<30) );
disable_irq ( IRQ_DMASCH0 );
}
int vidcaudio_intr ( void *arg )
{
int status = ReadByte(IOMD_SD0ST);
void (*nintr)();
void *narg;
void (*xintr)();
void *xarg;
int xcur, xend;
WriteWord ( IOMD_DMARQ, 0x10 );
#ifdef PRINT
printf ( "I" );
#endif
if ( ag.open==0 )
{
vidcaudio_shutdown ();
return 0;
}
/* Have I got the generic audio device attached */
#ifdef DEBUG
printf ( "[B%01x]", status );
#endif
nintr=ag.intr;
narg=ag.arg;
ag.intr = NULL;
xintr=ag.next_intr;
xarg=ag.next_arg;
xcur=ag.next_cur;
xend=ag.next_end;
ag.next_cur = 0;
ag.intr = xintr;
ag.arg = xarg;
if ( nintr )
{
#ifdef DEBUG
printf ( "i" );
#endif
(*nintr)(narg);
}
if ( xcur==0 )
{
vidcaudio_shutdown ();
}
else
{
#define OVERRUN (0x04)
#define INTERRUPT (0x02)
#define BANK_A (0x00)
#define BANK_B (0x01)
switch ( status&0x7 )
{
case (INTERRUPT|BANK_A):
#ifdef PRINT
printf( "B" );
#endif
WriteWord ( IOMD_SD0CURB, xcur );
WriteWord ( IOMD_SD0ENDB, xend|FLAGS );
break;
case (INTERRUPT|BANK_B):
#ifdef PRINT
printf( "A" );
#endif
WriteWord ( IOMD_SD0CURA, xcur );
WriteWord ( IOMD_SD0ENDA, xend|FLAGS );
break;
case (OVERRUN|INTERRUPT|BANK_A):
#ifdef PRINT
printf( "A" );
#endif
WriteWord ( IOMD_SD0CURA, xcur );
WriteWord ( IOMD_SD0ENDA, xend|FLAGS );
break;
case (OVERRUN|INTERRUPT|BANK_B):
#ifdef PRINT
printf( "B" );
#endif
WriteWord ( IOMD_SD0CURB, xcur );
WriteWord ( IOMD_SD0ENDB, xend|FLAGS );
break;
}
/*
ag.next_cur = 0;
ag.intr = xintr;
ag.arg = xarg;
*/
}
#ifdef PRINT
printf ( "i" );
#endif
if ( ag.next_cur==0 )
{
(*ag.intr)(ag.arg); /* Schedule the next buffer */
ag.intr = vidcaudio_dummy_routine; /* Already done this */
ag.arg = NULL;
}
return 0;
}
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