704 lines
14 KiB
C
704 lines
14 KiB
C
/* $NetBSD: vidcaudio.c,v 1.4 2001/11/27 01:03:53 thorpej Exp $ */
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/*
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* Copyright (c) 1995 Melvin Tang-Richardson
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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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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the RiscBSD team.
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* 4. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* audio driver for the RiscPC 16 bit sound
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*
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* Interfaces with the NetBSD generic audio driver to provide SUN
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* /dev/audio (partial) compatibility.
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*/
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#include <sys/param.h> /* proc.h */
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#include <sys/conf.h> /* autoconfig functions */
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#include <sys/device.h> /* device calls */
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#include <sys/proc.h> /* device calls */
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#include <sys/audioio.h>
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#include <sys/errno.h>
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#include <sys/systm.h>
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#include <uvm/uvm_extern.h>
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#include <dev/audio_if.h>
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#include <machine/intr.h>
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#include <arm/arm32/katelib.h>
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#include <arm/iomd/iomdreg.h>
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#include <arm/iomd/iomdvar.h>
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#include <arm/iomd/vidc.h>
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#include <arm/mainbus/mainbus.h>
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#include <arm/iomd/waveform.h>
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#include "vidcaudio.h"
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extern int *vidc_base;
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#undef DEBUG
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struct audio_general {
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vm_offset_t silence;
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irqhandler_t ih;
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void (*intr) ();
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void *arg;
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vm_offset_t next_cur;
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vm_offset_t next_end;
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void (*next_intr) ();
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void *next_arg;
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int buffer;
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int in_progress;
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int open;
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} ag;
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struct vidcaudio_softc {
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struct device device;
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int iobase;
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int open;
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};
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int vidcaudio_probe __P((struct device *parent, struct cfdata *cf, void *aux));
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void vidcaudio_attach __P((struct device *parent, struct device *self, void *aux));
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int vidcaudio_open __P((void *addr, int flags));
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void vidcaudio_close __P((void *addr));
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int vidcaudio_intr __P((void *arg));
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int vidcaudio_dma_program __P((vm_offset_t cur, vm_offset_t end, void (*intr)(), void *arg));
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void vidcaudio_dummy_routine __P((void *arg));
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int vidcaudio_stereo __P((int channel, int position));
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int vidcaudio_rate __P((int rate));
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void vidcaudio_shutdown __P((void));
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static int sound_dma_intr;
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struct cfattach vidcaudio_ca = {
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sizeof(struct vidcaudio_softc), vidcaudio_probe, vidcaudio_attach
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};
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int vidcaudio_query_encoding __P((void *, struct audio_encoding *));
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int vidcaudio_set_params __P((void *, int, int, struct audio_params *, struct audio_params *));
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int vidcaudio_round_blocksize __P((void *, int));
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int vidcaudio_start_output __P((void *, void *, int, void (*)(), void *));
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int vidcaudio_start_input __P((void *, void *, int, void (*)(), void *));
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int vidcaudio_halt_output __P((void *));
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int vidcaudio_halt_input __P((void *));
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int vidcaudio_speaker_ctl __P((void *, int));
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int vidcaudio_getdev __P((void *, struct audio_device *));
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int vidcaudio_set_port __P((void *, mixer_ctrl_t *));
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int vidcaudio_get_port __P((void *, mixer_ctrl_t *));
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int vidcaudio_query_devinfo __P((void *, mixer_devinfo_t *));
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int vidcaudio_get_props __P((void *));
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struct audio_device vidcaudio_device = {
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"VidcAudio 8-bit",
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"x",
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"vidcaudio"
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};
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struct audio_hw_if vidcaudio_hw_if = {
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vidcaudio_open,
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vidcaudio_close,
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0,
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vidcaudio_query_encoding,
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vidcaudio_set_params,
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vidcaudio_round_blocksize,
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0,
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0,
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0,
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vidcaudio_start_output,
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vidcaudio_start_input,
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vidcaudio_halt_output,
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vidcaudio_halt_input,
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vidcaudio_speaker_ctl,
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vidcaudio_getdev,
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0,
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vidcaudio_set_port,
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vidcaudio_get_port,
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vidcaudio_query_devinfo,
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0,
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0,
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0,
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0,
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vidcaudio_get_props,
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0,
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0,
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0,
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};
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void
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vidcaudio_beep_generate()
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{
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vidcaudio_dma_program(ag.silence, ag.silence+sizeof(beep_waveform)-16,
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vidcaudio_dummy_routine, NULL);
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}
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int
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vidcaudio_probe(parent, cf, aux)
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struct device *parent;
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struct cfdata* cf;
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void *aux;
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{
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int id;
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id = IOMD_ID;
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/* So far I only know about this IOMD */
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switch (id) {
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case RPC600_IOMD_ID:
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return(1);
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break;
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case ARM7500_IOC_ID:
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case ARM7500FE_IOC_ID:
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return(1);
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break;
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default:
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printf("vidcaudio: Unknown IOMD id=%04x", id);
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break;
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}
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return (0);
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}
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void
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vidcaudio_attach(parent, self, aux)
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struct device *parent;
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struct device *self;
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void *aux;
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{
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struct mainbus_attach_args *mb = aux;
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struct vidcaudio_softc *sc = (void *)self;
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int id;
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sc->iobase = mb->mb_iobase;
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sc->open = 0;
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ag.in_progress = 0;
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ag.next_cur = 0;
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ag.next_end = 0;
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ag.next_intr = NULL;
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ag.next_arg = NULL;
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vidcaudio_rate(32); /* 24*1024*/
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/* Program the silence buffer and reset the DMA channel */
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ag.silence = uvm_km_alloc(kernel_map, NBPG);
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if (ag.silence == NULL)
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panic("vidcaudio: Cannot allocate memory\n");
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memset((char *)ag.silence, 0, NBPG);
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memcpy((char *)ag.silence, (char *)beep_waveform, sizeof(beep_waveform));
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ag.buffer = 0;
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/* Install the irq handler for the DMA interrupt */
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ag.ih.ih_func = vidcaudio_intr;
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ag.ih.ih_arg = NULL;
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ag.ih.ih_level = IPL_AUDIO;
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ag.ih.ih_name = "vidcaudio";
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ag.intr = NULL;
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/* ag.nextintr = NULL;*/
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id = IOMD_ID;
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switch (id) {
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case RPC600_IOMD_ID:
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sound_dma_intr = IRQ_DMASCH0;
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break;
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case ARM7500_IOC_ID:
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case ARM7500FE_IOC_ID:
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sound_dma_intr = IRQ_SDMA;
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break;
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}
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disable_irq(sound_dma_intr);
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if (irq_claim(sound_dma_intr, &(ag.ih)))
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panic("vidcaudio: couldn't claim IRQ %d\n", sound_dma_intr);
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disable_irq(sound_dma_intr);
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printf("\n");
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vidcaudio_dma_program(ag.silence, ag.silence+NBPG-16,
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vidcaudio_dummy_routine, NULL);
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audio_attach_mi(&vidcaudio_hw_if, sc, &sc->device);
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#ifdef DEBUG
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printf(" UNDER DEVELOPMENT (nuts)\n");
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#endif
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}
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int
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vidcaudio_open(addr, flags)
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void *addr;
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int flags;
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{
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struct vidcaudio_softc *sc = addr;
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#ifdef DEBUG
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printf("DEBUG: vidcaudio_open called\n");
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#endif
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if (sc->open)
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return EBUSY;
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sc->open = 1;
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ag.open = 1;
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return 0;
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}
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void
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vidcaudio_close(addr)
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void *addr;
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{
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struct vidcaudio_softc *sc = addr;
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vidcaudio_shutdown();
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#ifdef DEBUG
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printf("DEBUG: vidcaudio_close called\n");
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#endif
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sc->open = 0;
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ag.open = 0;
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}
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/* ************************************************************************* *
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| Interface to the generic audio driver |
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* ************************************************************************* */
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int
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vidcaudio_query_encoding(addr, fp)
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void *addr;
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struct audio_encoding *fp;
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{
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switch (fp->index) {
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case 0:
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strcpy(fp->name, "vidc");
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fp->encoding = AUDIO_ENCODING_ULAW;
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fp->precision = 8;
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fp->flags = 0;
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break;
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default:
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return(EINVAL);
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}
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return 0;
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}
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int
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vidcaudio_set_params(addr, setmode, usemode, p, r)
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void *addr;
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int setmode, usemode;
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struct audio_params *p, *r;
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{
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if (p->encoding != AUDIO_ENCODING_ULAW ||
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p->channels != 8)
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return EINVAL;
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vidcaudio_rate(4 * p->sample_rate / (3 * 1024)); /* XXX probably wrong */
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return 0;
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}
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int
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vidcaudio_round_blocksize(addr, blk)
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void *addr;
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int blk;
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{
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if (blk > NBPG)
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blk = NBPG;
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return (blk);
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}
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#define ROUND(s) ( ((int)s) & (~(NBPG-1)) )
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int
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vidcaudio_start_output(addr, p, cc, intr, arg)
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void *addr;
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void *p;
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int cc;
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void (*intr)();
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void *arg;
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{
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/* I can only DMA inside 1 page */
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#ifdef DEBUG
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printf("vidcaudio_start_output (%d) %08x %08x\n", cc, intr, arg);
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#endif
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if (ROUND(p) != ROUND(p+cc)) {
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/*
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* If it's over a page I can fix it up by copying it into
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* my buffer
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*/
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#ifdef DEBUG
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printf("vidcaudio: DMA over page boundary requested."
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" Fixing up\n");
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#endif
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memcpy(p, (char *)ag.silence, cc > NBPG ? NBPG : cc);
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p = (void *)ag.silence;
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/*
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* I can't DMA any more than that, but it is possible to
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* fix it up by handling multiple buffers and only
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* interrupting the audio driver after sending out all the
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* stuff it gave me. That it more than I can be bothered
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* to do right now and it probablly wont happen so I'll just
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* truncate the buffer and tell the user.
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*/
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if (cc > NBPG) {
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printf("vidcaudio: DMA buffer truncated. I could fix this up\n");
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cc = NBPG;
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}
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}
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vidcaudio_dma_program((vm_offset_t)p, (vm_offset_t)((char *)p+cc),
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intr, arg);
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return 0;
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}
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int
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vidcaudio_start_input(addr, p, cc, intr, arg)
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void *addr;
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void *p;
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int cc;
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void (*intr)();
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void *arg;
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{
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return EIO;
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}
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int
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vidcaudio_halt_output(addr)
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void *addr;
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{
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#ifdef DEBUG
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printf("DEBUG: vidcaudio_halt_output\n");
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#endif
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return EIO;
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}
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int
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vidcaudio_halt_input(addr)
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void *addr;
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{
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#ifdef DEBUG
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printf("DEBUG: vidcaudio_halt_input\n");
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#endif
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return EIO;
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}
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int
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vidcaudio_speaker_ctl(addr, newstate)
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void *addr;
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int newstate;
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{
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#ifdef DEBUG
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printf("DEBUG: vidcaudio_speaker_ctl\n");
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#endif
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return 0;
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}
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int
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vidcaudio_getdev(addr, retp)
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void *addr;
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struct audio_device *retp;
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{
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*retp = vidcaudio_device;
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return 0;
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}
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int
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vidcaudio_set_port(addr, cp)
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void *addr;
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mixer_ctrl_t *cp;
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{
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return EINVAL;
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}
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int
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vidcaudio_get_port(addr, cp)
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void *addr;
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mixer_ctrl_t *cp;
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{
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return EINVAL;
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}
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int
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vidcaudio_query_devinfo(addr, dip)
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void *addr;
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mixer_devinfo_t *dip;
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{
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return ENXIO;
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}
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int
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vidcaudio_get_props(addr)
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void *addr;
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{
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return 0;
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}
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void
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vidcaudio_dummy_routine(arg)
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void *arg;
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{
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#ifdef DEBUG
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printf("vidcaudio_dummy_routine\n");
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#endif
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}
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int
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vidcaudio_rate(rate)
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int rate;
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{
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WriteWord(vidc_base, VIDC_SFR | rate);
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return 0;
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}
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int
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vidcaudio_stereo(channel, position)
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int channel;
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int position;
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{
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if (channel < 0) return EINVAL;
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if (channel > 7) return EINVAL;
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channel = channel<<24 | VIDC_SIR0;
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WriteWord(vidc_base, channel | position);
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return 0;
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}
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#define PHYS(x, y) pmap_extract(pmap_kernel(), ((x)&PG_FRAME), (paddr_t *)(y))
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/*
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* Program the next buffer to be used
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* This function must be re-entrant, maximum re-entrancy of 2
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*/
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#define FLAGS (0)
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int
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vidcaudio_dma_program(cur, end, intr, arg)
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vm_offset_t cur;
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vm_offset_t end;
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void (*intr)();
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void *arg;
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{
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paddr_t pa1, pa2;
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/* If there isn't a transfer in progress then start a new one */
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if (ag.in_progress == 0) {
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ag.buffer = 0;
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IOMD_WRITE_WORD(IOMD_SD0CR, 0x90); /* Reset State Machine */
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IOMD_WRITE_WORD(IOMD_SD0CR, 0x30); /* Reset State Machine */
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PHYS(cur, &pa1);
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PHYS(end - 16, &pa2);
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IOMD_WRITE_WORD(IOMD_SD0CURB, pa1);
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IOMD_WRITE_WORD(IOMD_SD0ENDB, pa2|FLAGS);
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IOMD_WRITE_WORD(IOMD_SD0CURA, pa1);
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IOMD_WRITE_WORD(IOMD_SD0ENDA, pa2|FLAGS);
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ag.in_progress = 1;
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ag.next_cur = ag.next_end = 0;
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ag.next_intr = ag.next_arg = 0;
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ag.intr = intr;
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ag.arg = arg;
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/*
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* The driver 'clicks' between buffer swaps, leading me
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* to think that the fifo is much small than on other
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* sound cards so I'm going to have to do some tricks here
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*/
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(*ag.intr)(ag.arg); /* Schedule the next buffer */
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ag.intr = vidcaudio_dummy_routine; /* Already done this */
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ag.arg = NULL;
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#ifdef PRINT
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printf("vidcaudio: start output\n");
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#endif
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#ifdef DEBUG
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printf("SE");
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#endif
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enable_irq(sound_dma_intr);
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} else {
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/* Otherwise schedule the next one */
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if (ag.next_cur != 0) {
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/* If there's one scheduled then complain */
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printf("vidcaudio: Buffer already Q'ed\n");
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return EIO;
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} 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 */
|
|
}
|