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

707 lines
14 KiB
C

/* $NetBSD: vidcaudio.c,v 1.33 2000/06/29 08:53:03 mrg 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.
*/
/*
* audio driver for the RiscPC 16 bit sound
*
* Interfaces with the NetBSD generic audio driver to provide SUN
* /dev/audio (partial) compatibility.
*/
#include "opt_cputypes.h"
#include <sys/param.h> /* proc.h */
#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 <uvm/uvm_extern.h>
#include <dev/audio_if.h>
#include <machine/irqhandler.h>
#include <machine/vidc.h>
#include <machine/katelib.h>
#include <arm32/iomd/iomdreg.h>
#include <arm32/mainbus/mainbus.h>
#include <arm32/vidc/waveform.h>
#include "vidcaudio.h"
#undef DEBUG
struct audio_general {
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;
struct vidcaudio_softc {
struct device device;
int iobase;
int open;
};
int vidcaudio_probe __P((struct device *parent, struct cfdata *cf, void *aux));
void vidcaudio_attach __P((struct device *parent, struct device *self, void *aux));
int vidcaudio_open __P((void *addr, int flags));
void vidcaudio_close __P((void *addr));
int vidcaudio_intr __P((void *arg));
int vidcaudio_dma_program __P((vm_offset_t cur, vm_offset_t end, void (*intr)(), void *arg));
void vidcaudio_dummy_routine __P((void *arg));
int vidcaudio_stereo __P((int channel, int position));
int vidcaudio_rate __P((int rate));
void vidcaudio_shutdown __P((void));
static int sound_dma_intr;
struct cfattach vidcaudio_ca = {
sizeof(struct vidcaudio_softc), vidcaudio_probe, vidcaudio_attach
};
int vidcaudio_query_encoding __P((void *, struct audio_encoding *));
int vidcaudio_set_params __P((void *, int, int, struct audio_params *, struct audio_params *));
int vidcaudio_round_blocksize __P((void *, int));
int vidcaudio_start_output __P((void *, void *, int, void (*)(), void *));
int vidcaudio_start_input __P((void *, void *, int, void (*)(), void *));
int vidcaudio_halt_output __P((void *));
int vidcaudio_halt_input __P((void *));
int vidcaudio_speaker_ctl __P((void *, int));
int vidcaudio_getdev __P((void *, struct audio_device *));
int vidcaudio_set_port __P((void *, mixer_ctrl_t *));
int vidcaudio_get_port __P((void *, mixer_ctrl_t *));
int vidcaudio_query_devinfo __P((void *, mixer_devinfo_t *));
int vidcaudio_get_props __P((void *));
struct audio_device vidcaudio_device = {
"VidcAudio 8-bit",
"x",
"vidcaudio"
};
struct audio_hw_if vidcaudio_hw_if = {
vidcaudio_open,
vidcaudio_close,
0,
vidcaudio_query_encoding,
vidcaudio_set_params,
vidcaudio_round_blocksize,
0,
0,
0,
vidcaudio_start_output,
vidcaudio_start_input,
vidcaudio_halt_output,
vidcaudio_halt_input,
vidcaudio_speaker_ctl,
vidcaudio_getdev,
0,
vidcaudio_set_port,
vidcaudio_get_port,
vidcaudio_query_devinfo,
0,
0,
0,
0,
vidcaudio_get_props,
};
void
vidcaudio_beep_generate()
{
vidcaudio_dma_program(ag.silence, ag.silence+sizeof(beep_waveform)-16,
vidcaudio_dummy_routine, NULL);
}
int
vidcaudio_probe(parent, cf, aux)
struct device *parent;
struct cfdata* cf;
void *aux;
{
int id;
id = IOMD_ID;
/* So far I only know about this IOMD */
switch (id) {
case RPC600_IOMD_ID:
return(1);
break;
case ARM7500_IOC_ID:
case ARM7500FE_IOC_ID:
#ifdef RC7500
return(0);
#else
return(1);
#endif
break;
default:
printf("vidcaudio: Unknown IOMD id=%04x", id);
break;
}
return (0);
}
void
vidcaudio_attach(parent, self, aux)
struct device *parent;
struct device *self;
void *aux;
{
struct mainbus_attach_args *mb = aux;
struct vidcaudio_softc *sc = (void *)self;
int id;
sc->iobase = mb->mb_iobase;
sc->open = 0;
ag.in_progress = 0;
ag.next_cur = 0;
ag.next_end = 0;
ag.next_intr = NULL;
ag.next_arg = NULL;
vidcaudio_rate(32); /* 24*1024*/
/* Program the silence buffer and reset the DMA channel */
ag.silence = uvm_km_alloc(kernel_map, NBPG);
if (ag.silence == NULL)
panic("vidcaudio: Cannot allocate memory\n");
memset((char *)ag.silence, 0, NBPG);
memcpy((char *)ag.silence, (char *)beep_waveform, 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_AUDIO;
ag.ih.ih_name = "vidcaudio";
ag.intr = NULL;
/* ag.nextintr = NULL;*/
id = IOMD_ID;
switch (id) {
#ifndef CPU_ARM7500
case RPC600_IOMD_ID:
sound_dma_intr = IRQ_DMASCH0;
break;
#else
case ARM7500_IOC_ID:
case ARM7500FE_IOC_ID:
sound_dma_intr = IRQ_SDMA;
break;
#endif
}
disable_irq(sound_dma_intr);
if (irq_claim(sound_dma_intr, &(ag.ih)))
panic("vidcaudio: couldn't claim IRQ %d\n", sound_dma_intr);
disable_irq(sound_dma_intr);
printf("\n");
vidcaudio_dma_program(ag.silence, ag.silence+NBPG-16,
vidcaudio_dummy_routine, NULL);
audio_attach_mi(&vidcaudio_hw_if, sc, &sc->device);
#ifdef DEBUG
printf(" UNDER DEVELOPMENT (nuts)\n");
#endif
}
int
vidcaudio_open(addr, flags)
void *addr;
int flags;
{
struct vidcaudio_softc *sc = addr;
#ifdef DEBUG
printf("DEBUG: vidcaudio_open called\n");
#endif
if (sc->open)
return EBUSY;
sc->open = 1;
ag.open = 1;
return 0;
}
void
vidcaudio_close(addr)
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_query_encoding(addr, fp)
void *addr;
struct audio_encoding *fp;
{
switch (fp->index) {
case 0:
strcpy(fp->name, "vidc");
fp->encoding = AUDIO_ENCODING_ULAW;
fp->precision = 8;
fp->flags = 0;
break;
default:
return(EINVAL);
}
return 0;
}
int
vidcaudio_set_params(addr, setmode, usemode, p, r)
void *addr;
int setmode, usemode;
struct audio_params *p, *r;
{
if (p->encoding != AUDIO_ENCODING_ULAW ||
p->channels != 8)
return EINVAL;
vidcaudio_rate(4 * p->sample_rate / (3 * 1024)); /* XXX probably wrong */
return 0;
}
int
vidcaudio_round_blocksize(addr, blk)
void *addr;
int blk;
{
if (blk > NBPG)
blk = NBPG;
return (blk);
}
#define ROUND(s) ( ((int)s) & (~(NBPG-1)) )
int
vidcaudio_start_output(addr, p, cc, intr, arg)
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
memcpy(p, (char *)ag.silence, 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)((char *)p+cc),
intr, arg);
return 0;
}
int
vidcaudio_start_input(addr, p, cc, intr, arg)
void *addr;
void *p;
int cc;
void (*intr)();
void *arg;
{
return EIO;
}
int
vidcaudio_halt_output(addr)
void *addr;
{
#ifdef DEBUG
printf("DEBUG: vidcaudio_halt_output\n");
#endif
return EIO;
}
int
vidcaudio_halt_input(addr)
void *addr;
{
#ifdef DEBUG
printf("DEBUG: vidcaudio_halt_input\n");
#endif
return EIO;
}
int
vidcaudio_speaker_ctl(addr, newstate)
void *addr;
int newstate;
{
#ifdef DEBUG
printf("DEBUG: vidcaudio_speaker_ctl\n");
#endif
return 0;
}
int
vidcaudio_getdev(addr, retp)
void *addr;
struct audio_device *retp;
{
*retp = vidcaudio_device;
return 0;
}
int
vidcaudio_set_port(addr, cp)
void *addr;
mixer_ctrl_t *cp;
{
return EINVAL;
}
int
vidcaudio_get_port(addr, cp)
void *addr;
mixer_ctrl_t *cp;
{
return EINVAL;
}
int
vidcaudio_query_devinfo(addr, dip)
void *addr;
mixer_devinfo_t *dip;
{
return ENXIO;
}
int
vidcaudio_get_props(addr)
void *addr;
{
return 0;
}
void
vidcaudio_dummy_routine(arg)
void *arg;
{
#ifdef DEBUG
printf("vidcaudio_dummy_routine\n");
#endif
}
int
vidcaudio_rate(rate)
int rate;
{
WriteWord(VIDC_BASE, VIDC_SFR | rate);
return 0;
}
int
vidcaudio_stereo(channel, position)
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, y) pmap_extract(kernel_pmap, ((x)&PG_FRAME), (paddr_t *)(y))
/*
* 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(cur, end, intr, arg)
vm_offset_t cur;
vm_offset_t end;
void (*intr)();
void *arg;
{
paddr_t pa1, pa2;
/* If there isn't a transfer in progress then start a new one */
if (ag.in_progress == 0) {
ag.buffer = 0;
IOMD_WRITE_WORD(IOMD_SD0CR, 0x90); /* Reset State Machine */
IOMD_WRITE_WORD(IOMD_SD0CR, 0x30); /* Reset State Machine */
PHYS(cur, &pa1);
PHYS(end - 16, &pa2);
IOMD_WRITE_WORD(IOMD_SD0CURB, pa1);
IOMD_WRITE_WORD(IOMD_SD0ENDB, pa2|FLAGS);
IOMD_WRITE_WORD(IOMD_SD0CURA, pa1);
IOMD_WRITE_WORD(IOMD_SD0ENDA, pa2|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 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(sound_dma_intr);
} 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;
PHYS(cur, &ag.next_cur);
PHYS(end - 16, &ag.next_end);
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
IOMD_WRITE_WORD(IOMD_SD0CURB, ag.silence);
IOMD_WRITE_WORD(IOMD_SD0ENDB, (ag.silence + NBPG - 16) | (1<<30));
disable_irq(sound_dma_intr);
}
int
vidcaudio_intr(arg)
void *arg;
{
int status = IOMD_READ_BYTE(IOMD_SD0ST);
void (*nintr)();
void *narg;
void (*xintr)();
void *xarg;
int xcur, xend;
IOMD_WRITE_WORD(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
IOMD_WRITE_WORD(IOMD_SD0CURB, xcur);
IOMD_WRITE_WORD(IOMD_SD0ENDB, xend|FLAGS);
break;
case (INTERRUPT|BANK_B):
#ifdef PRINT
printf("A");
#endif
IOMD_WRITE_WORD(IOMD_SD0CURA, xcur);
IOMD_WRITE_WORD(IOMD_SD0ENDA, xend|FLAGS);
break;
case (OVERRUN|INTERRUPT|BANK_A):
#ifdef PRINT
printf("A");
#endif
IOMD_WRITE_WORD(IOMD_SD0CURA, xcur);
IOMD_WRITE_WORD(IOMD_SD0ENDA, xend|FLAGS);
break;
case (OVERRUN|INTERRUPT|BANK_B):
#ifdef PRINT
printf("B");
#endif
IOMD_WRITE_WORD(IOMD_SD0CURB, xcur);
IOMD_WRITE_WORD(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); /* Pass interrupt on down the chain */
}