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

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/* $NetBSD: beep.c,v 1.3 1996/03/17 01:24:23 thorpej Exp $ */
/*
* Copyright (c) 1995 Mark Brinicombe
*
* 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.
*/
/*
* Simple beep sounds using VIDC
*/
/*
* To use the driver, open /dev/beep and write lines.
* Each write will generate a beep
*
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/ioctl.h>
#include <sys/tty.h>
#include <sys/kernel.h>
#include <sys/types.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <sys/time.h>
#include <sys/errno.h>
#include <dev/cons.h>
#include <vm/vm.h>
#include <vm/vm_kern.h>
#include <machine/irqhandler.h>
#include <machine/katelib.h>
#include <machine/iomd.h>
#include <machine/vidc.h>
#include <machine/pmap.h>
#include <machine/beep.h>
#include <arm32/mainbus/mainbus.h>
#include <arm32/mainbus/waveform.h>
#include "beep.h"
struct beep_softc {
struct device sc_device;
irqhandler_t sc_ih;
int sc_iobase;
int sc_open;
int sc_count;
u_int sc_sound_cur0;
u_int sc_sound_end0;
u_int sc_sound_cur1;
u_int sc_sound_end1;
vm_offset_t sc_buffer0;
vm_offset_t sc_buffer1;
};
int beepprobe __P((struct device *parent, void *match, void *aux));
void beepattach __P((struct device *parent, struct device *self, void *aux));
int beepopen __P((dev_t, int, int, struct proc *));
int beepclose __P((dev_t, int, int, struct proc *));
int beepintr __P((struct beep_softc *sc));
void beepdma __P((struct beep_softc *sc, int buf));
struct cfattach beep_ca = {
sizeof(struct beep_softc), beepprobe, beepattach
};
struct cfdriver beep_cd = {
NULL, "beep", DV_TTY
};
int
beepprobe(parent, match, aux)
struct device *parent;
void *match;
void *aux;
{
/* struct mainbus_attach_args *mb = aux;*/
int id;
/* Make sure we have an IOMD we understand */
id = ReadByte(IOMD_ID0) | (ReadByte(IOMD_ID1) << 8);
/* So far I only know about this IOMD */
switch (id) {
case RPC600_IOMD_ID:
return(1);
break;
default:
printf("beep: Unknown IOMD id=%04x", id);
break;
}
return(0);
}
void
beepattach(parent, self, aux)
struct device *parent;
struct device *self;
void *aux;
{
struct beep_softc *sc = (void *)self;
struct mainbus_attach_args *mb = aux;
sc->sc_iobase = mb->mb_iobase;
sc->sc_open = 0;
sc->sc_count = 0;
sc->sc_buffer0 = kmem_alloc(kernel_map, NBPG);
if (sc->sc_buffer0 == 0)
panic("beep: Cannot allocate buffer memory\n");
if ((sc->sc_buffer0 & (NBPG -1)) != 0)
panic("beep: Cannot allocate page aligned buffer\n");
sc->sc_buffer1 = sc->sc_buffer0;
sc->sc_sound_cur0 = pmap_extract(kernel_pmap,
(vm_offset_t)sc->sc_buffer0 & PG_FRAME);
sc->sc_sound_end0 = (sc->sc_sound_cur0 + NBPG - 16) | 0x00000000;
sc->sc_sound_cur1 = pmap_extract(kernel_pmap,
(vm_offset_t)sc->sc_buffer1 & PG_FRAME);
sc->sc_sound_end1 = (sc->sc_sound_cur1 + NBPG - 16) | 0x00000000;
bcopy(beep_waveform, (void *)sc->sc_buffer0, sizeof(beep_waveform));
/* Reset the sound DMA channel */
WriteWord(IOMD_SD0CURA, sc->sc_sound_cur0);
WriteWord(IOMD_SD0ENDA, sc->sc_sound_end0 | 0xc0000000);
WriteWord(IOMD_SD0CURB, sc->sc_sound_cur1);
WriteWord(IOMD_SD0ENDB, sc->sc_sound_end1 | 0xc0000000);
WriteByte(IOMD_SD0CR, 0x90);
/* Install an IRQ handler */
sc->sc_ih.ih_func = beepintr;
sc->sc_ih.ih_arg = sc;
sc->sc_ih.ih_level = IPL_NONE;
if (irq_claim(IRQ_DMASCH0, &sc->sc_ih))
panic("Cannot claim DMASCH0 IRQ for beep%d\n", parent->dv_unit);
disable_irq(IRQ_DMASCH0);
/*
printf(" [ buf0=%08x:%08x->%08x buf1=%08x:%08x->%08x ]",
(u_int)sc->sc_buffer0, sc->sc_sound_cur0, sc->sc_sound_end0,
(u_int)sc->sc_buffer1, sc->sc_sound_cur1, sc->sc_sound_end1);
*/
printf("\n");
/* Set sample rate to 32us */
WriteWord(VIDC_BASE, VIDC_SFR | 32);
/* Set the stereo postions to centred for all channels */
WriteWord(VIDC_BASE, VIDC_SIR0 | SIR_CENTRE);
WriteWord(VIDC_BASE, VIDC_SIR1 | SIR_CENTRE);
WriteWord(VIDC_BASE, VIDC_SIR2 | SIR_CENTRE);
WriteWord(VIDC_BASE, VIDC_SIR3 | SIR_CENTRE);
WriteWord(VIDC_BASE, VIDC_SIR4 | SIR_CENTRE);
WriteWord(VIDC_BASE, VIDC_SIR5 | SIR_CENTRE);
WriteWord(VIDC_BASE, VIDC_SIR6 | SIR_CENTRE);
WriteWord(VIDC_BASE, VIDC_SIR7 | SIR_CENTRE);
}
int
beepopen(dev, flag, mode, p)
dev_t dev;
int flag;
int mode;
struct proc *p;
{
struct beep_softc *sc;
int unit = minor(dev);
int s;
if (unit >= beep_cd.cd_ndevs)
return(ENXIO);
sc = beep_cd.cd_devs[unit];
if (!sc) return(ENXIO);
/* HACK hack hack */
s = splhigh();
if (sc->sc_open) {
(void)splx(s);
return(EBUSY);
}
++sc->sc_open;
(void)splx(s);
return(0);
}
int
beepclose(dev, flag, mode, p)
dev_t dev;
int flag;
int mode;
struct proc *p;
{
int unit = minor(dev);
struct beep_softc *sc = beep_cd.cd_devs[unit];
int s;
if (sc->sc_open == 0) return(ENXIO);
/* HACK hack hack */
s = splhigh();
--sc->sc_open;
(void)splx(s);
return(0);
}
void
beep_generate(void)
{
struct beep_softc *sc = beep_cd.cd_devs[0];
/* int status;*/
if (sc->sc_count > 0) {
/* printf("beep: active\n");*/
return;
}
/* printf("beep: generate ");*/
++sc->sc_count;
/* status = ReadByte(IOMD_SD0ST);
printf("st=%02x\n", status);*/
WriteByte(IOMD_SD0CR, 0x90);
WriteByte(IOMD_SD0CR, 0x30);
beepdma(sc, 0);
}
int
beepioctl(dev, cmd, data, flag, p)
dev_t dev;
int cmd;
caddr_t data;
int flag;
struct proc *p;
{
struct beep_softc *sc = beep_cd.cd_devs[minor(dev)];
int rate;
struct wavebuffer *wave = (struct wavebuffer *)data;
switch (cmd) {
case BEEP_GENERATE:
beep_generate();
break;
case BEEP_SETRATE:
rate = *(int *)data;
if (rate < 3 || rate > 255)
return(EINVAL);
WriteWord(VIDC_BASE, VIDC_SFR | rate);
break;
case BEEP_SET:
printf("set %08x\n", (u_int)data);
printf("set %08x %08x\n", (u_int)wave->addr, wave->size);
if (wave->size < 16 || wave->size > NBPG)
return(ENXIO);
copyin(wave->addr, (char *)sc->sc_buffer0, wave->size);
sc->sc_sound_end0 = (sc->sc_sound_cur0 + wave->size - 16);
sc->sc_sound_end1 = (sc->sc_sound_cur1 + wave->size - 16);
break;
default:
return(ENXIO);
break;
}
return(0);
}
int
beepintr(sc)
struct beep_softc *sc;
{
/* printf("beepintr: %02x,%02x,%02x,%d\n", ReadByte(IOMD_DMARQ),
ReadByte(IOMD_SD0CR), ReadByte(IOMD_SD0ST), sc->sc_count);*/
WriteByte(IOMD_DMARQ, 0x10);
--sc->sc_count;
if (sc->sc_count <= 0) {
WriteWord(IOMD_SD0CURB, sc->sc_sound_cur1);
WriteWord(IOMD_SD0ENDB, sc->sc_sound_end1 | (1 << 30));
disable_irq(IRQ_DMASCH0);
/* printf("stop:st=%02x\n", ReadByte(IOMD_SD0ST));*/
return(1);
}
beepdma(sc, sc->sc_count & 1);
return(1);
}
void
beepdma(sc, buf)
struct beep_softc *sc;
int buf;
{
int status;
/* printf("beep:dma %d", buf); */
status = ReadByte(IOMD_SD0ST);
/* printf("st=%02x\n", status);*/
if (buf == 0) {
WriteWord(IOMD_SD0CURA, sc->sc_sound_cur0);
WriteWord(IOMD_SD0ENDA, sc->sc_sound_end0);
WriteWord(IOMD_SD0CURB, sc->sc_sound_cur1);
WriteWord(IOMD_SD0ENDB, sc->sc_sound_end1 | (1 << 30));
}
if (buf == 1) {
WriteWord(IOMD_SD0CURB, sc->sc_sound_cur1);
WriteWord(IOMD_SD0ENDB, sc->sc_sound_end1 | (1 << 30));
}
/* status = ReadByte(IOMD_SD0ST);
printf("st=%02x\n", status);*/
enable_irq(IRQ_DMASCH0);
}
/* End of beep.c */
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