608 lines
14 KiB
C
608 lines
14 KiB
C
/*
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* sound/sb16_dsp.c
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*
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* The low level driver for the SoundBlaster DSP chip.
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*
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* (C) 1993 J. Schubert (jsb@sth.ruhr-uni-bochum.de)
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*
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* based on SB-driver by (C) Hannu Savolainen
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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 are
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* met: 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer. 2.
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* Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* 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 ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* 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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#define DEB(x)
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#define DEB1(x)
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/*
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#define DEB_DMARES
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*/
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#include "sound_config.h"
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#include "sb.h"
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#include "sb_mixer.h"
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#if defined(CONFIGURE_SOUNDCARD) && !defined(EXCLUDE_SB16) && !defined(EXCLUDE_SB) && !defined(EXCLUDE_AUDIO) && !defined(EXCLUDE_SBPRO)
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extern int sbc_base;
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static int sb16_dsp_ok = 0; /* Set to 1 after successful initialization */
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static int dsp_16bit = 0;
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static int dsp_stereo = 0;
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static int dsp_current_speed = 8000;/*DSP_DEFAULT_SPEED;*/
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static int dsp_busy = 0;
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static int dma16, dma8;
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static unsigned long dsp_count = 0;
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static int irq_mode = IMODE_NONE; /* IMODE_INPUT, IMODE_OUTPUT or
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IMODE_NONE */
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static int my_dev = 0;
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static volatile int intr_active = 0;
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static int sb16_dsp_open (int dev, int mode);
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static void sb16_dsp_close (int dev);
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static void sb16_dsp_output_block (int dev, unsigned long buf, int count,int intrflag, int dma_restart);
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static void sb16_dsp_start_input (int dev, unsigned long buf, int count,int intrflag, int dma_restart);
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static int sb16_dsp_ioctl (int dev, unsigned int cmd, unsigned int arg,int local);
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static int sb16_dsp_prepare_for_input (int dev, int bsize, int bcount);
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static int sb16_dsp_prepare_for_output (int dev, int bsize, int bcount);
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static void sb16_dsp_reset (int dev);
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static void sb16_dsp_halt (int dev);
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static int dsp_set_speed (int);
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static int dsp_set_stereo (int);
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static void dsp_cleanup (void);
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int sb_reset_dsp (void);
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static struct audio_operations sb16_dsp_operations =
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{
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"SoundBlaster 16",
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sb16_dsp_open,
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sb16_dsp_close,
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sb16_dsp_output_block,
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sb16_dsp_start_input,
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sb16_dsp_ioctl,
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sb16_dsp_prepare_for_input,
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sb16_dsp_prepare_for_output,
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sb16_dsp_reset,
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sb16_dsp_halt,
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NULL,
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NULL
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};
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static int sb_dsp_command01 (unsigned char val)
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{
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int i=1<<16;
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while(--i & (!INB (DSP_STATUS) & 0x80));
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if(!i)
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printk("SB16 sb_dsp_command01 Timeout\n");
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return sb_dsp_command(val);
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}
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static int wait_data_avail(int t)
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{
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int loopc=5000000;
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t+=GET_TIME();
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do {
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if(INB(DSP_DATA_AVAIL) & 0x80)
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return 1;
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} while(--loopc && GET_TIME()<t);
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printk("!data_avail l=%d\n",loopc);
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return 0;
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}
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static int read_dsp(int t)
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{
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if(!wait_data_avail(t))
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return -1;
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else
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return INB(DSP_READ);
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}
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static int dsp_ini2(void)
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{
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#if 0
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/* sb_setmixer(0x83, sb_getmixer(0x83) | 0x03); */
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sb_dsp_command(0xe2);
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sb_dsp_command(0x76); /* E0 ??? */
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sb_dsp_command(0xe2);
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sb_dsp_command(0x30); /* A0 ??? */
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sb_dsp_command(0xe4);
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sb_dsp_command(0xaa);
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sb_dsp_command(0xe8);
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if(read_dsp(100)!=0xaa)
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printk("Error dsp_ini2\n");
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#endif
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return 0;
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}
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/*
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static char *dsp_getmessage(unsigned char command,int maxn)
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{
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static char buff[100];
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int n=0;
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sb_dsp_command(command);
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while(n<maxn && wait_data_avail(2)) {
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buff[++n]=INB(DSP_READ);
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if(!buff[n])
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break;
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}
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buff[0]=n;
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return buff;
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}
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static void dsp_showmessage(unsigned char command,int len)
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{
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int n;
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unsigned char *c;
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c=dsp_getmessage(command,len);
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printk("DSP C=%x l=%d,lr=%d b=",command,len,c[0]);
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for(n=1;n<=c[0];n++)
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if(c[n]>=' ' & c[n]<='z')
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printk("%c",c[n]);
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else
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printk("|%x|",c[n]);
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printk("\n");
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}
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*/
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static int dsp_set_speed(int mode)
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{
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DEB(printk("dsp_set_speed(%d)\n",mode));
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if (mode)
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{
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if (mode < 5000) mode = 5000;
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if (mode > 44100) mode = 44100;
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dsp_current_speed=mode;
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}
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return mode;
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}
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static int dsp_set_stereo(int mode)
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{
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DEB(printk("dsp_set_stereo(%d)\n",mode));
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dsp_stereo=mode;
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return mode;
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}
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static int dsp_set_bits(int arg) {
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DEB(printk("dsp_set_bits(%d)\n",arg));
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if (arg)
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switch(arg) {
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case 8:
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dsp_16bit=0; break;
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case 16:
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dsp_16bit=1; break;
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default:
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return RET_ERROR(EINVAL);
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}
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return dsp_16bit? 16:8;
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}
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static int
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sb16_dsp_ioctl (int dev, unsigned int cmd, unsigned int arg,int local)
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{
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switch (cmd) {
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case SOUND_PCM_WRITE_RATE:
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if(local)
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return dsp_set_speed(arg);
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return IOCTL_OUT (arg, dsp_set_speed (IOCTL_IN (arg)));
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case SOUND_PCM_READ_RATE:
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if(local)
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return dsp_current_speed;
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return IOCTL_OUT (arg, dsp_current_speed);
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case SNDCTL_DSP_STEREO:
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if (local)
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return dsp_set_stereo(arg);
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return IOCTL_OUT (arg, dsp_set_stereo(IOCTL_IN(arg)));
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case SOUND_PCM_WRITE_CHANNELS:
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if (local)
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return dsp_set_stereo(arg-1)+1;
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return IOCTL_OUT (arg, dsp_set_stereo (IOCTL_IN (arg) - 1) + 1);
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case SOUND_PCM_READ_CHANNELS:
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if (local)
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return dsp_stereo+1;
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return IOCTL_OUT (arg, dsp_stereo+1);
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case SNDCTL_DSP_SAMPLESIZE:
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if (local)
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return dsp_set_bits (arg);
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return IOCTL_OUT (arg, dsp_set_bits (IOCTL_IN (arg)));
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case SOUND_PCM_READ_BITS:
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if (local)
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return dsp_16bit?16:8;
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return IOCTL_OUT (arg, dsp_16bit?16:8);
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case SOUND_PCM_WRITE_FILTER: /* NOT YET IMPLEMENTED */
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if (IOCTL_IN (arg) > 1)
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return IOCTL_OUT (arg, RET_ERROR (EINVAL));
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default:
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return RET_ERROR (EINVAL);
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}
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return RET_ERROR (EINVAL);
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}
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static int
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sb16_dsp_open (int dev, int mode)
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{
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int retval;
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DEB(printk("sb16_dsp_open()\n"));
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if (!sb16_dsp_ok)
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{
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printk ("SB16 Error: SoundBlaster board not installed\n");
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return RET_ERROR(ENXIO);
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}
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if (intr_active)
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return RET_ERROR(EBUSY);
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retval = sb_get_irq ();
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if (retval<0)
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return retval;
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if (ALLOC_DMA_CHN (dma8))
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{
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printk ("SB16: Unable to grab DMA%d\n", dma8);
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sb_free_irq();
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return RET_ERROR(EBUSY);
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}
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if (dma16 != dma8)
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if (ALLOC_DMA_CHN (dma16))
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{
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printk ("SB16: Unable to grab DMA%d\n", dma16);
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sb_free_irq();
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RELEASE_DMA_CHN (dma8);
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return RET_ERROR(EBUSY);
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}
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dsp_ini2();
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irq_mode = IMODE_NONE;
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dsp_busy = 1;
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return 0;
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}
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static void
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sb16_dsp_close (int dev)
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{
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unsigned long flags;
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DEB(printk("sb16_dsp_close()\n"));
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sb_dsp_command01(0xd9);
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sb_dsp_command01(0xd5);
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DISABLE_INTR (flags);
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RELEASE_DMA_CHN (dma8);
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if (dma16 != dma8)
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RELEASE_DMA_CHN (dma16);
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sb_free_irq ();
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dsp_cleanup ();
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dsp_busy = 0;
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RESTORE_INTR (flags);
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}
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static void
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sb16_dsp_output_block (int dev, unsigned long buf, int count,int intrflag, int dma_restart)
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{
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unsigned long flags, cnt;
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cnt = count;
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if (dsp_16bit)
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cnt >>= 1;
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cnt--;
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#ifdef DEB_DMARES
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printk("output_block: %x %d %d\n",buf,count,intrflag);
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if(intrflag) {
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int pos,chan=sound_dsp_dmachan[dev];
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DISABLE_INTR (flags);
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clear_dma_ff(chan);
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disable_dma(chan);
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pos=get_dma_residue(chan);
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enable_dma(chan);
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RESTORE_INTR (flags);
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printk("dmapos=%d %x\n",pos,pos);
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}
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#endif
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if (sound_dma_automode[dev] &&
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intrflag &&
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cnt == dsp_count) {
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irq_mode = IMODE_OUTPUT;
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intr_active = 1;
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return; /* Auto mode on. No need to react */
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}
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DISABLE_INTR (flags);
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if (dma_restart)
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{
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sb16_dsp_halt(dev);
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DMAbuf_start_dma (dev, buf, count, DMA_MODE_WRITE);
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}
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sb_dsp_command (0x41);
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sb_dsp_command ((unsigned char)((dsp_current_speed >> 8) & 0xff));
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sb_dsp_command ((unsigned char)(dsp_current_speed & 0xff));
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sb_dsp_command ((unsigned char)(dsp_16bit ? 0xb6 : 0xc6));
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sb_dsp_command ((unsigned char)((dsp_stereo ? 0x20 : 0) +
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(dsp_16bit ? 0x10:0)));
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sb_dsp_command01 ((unsigned char)(cnt&0xff));
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sb_dsp_command ((unsigned char)(cnt>>8));
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/* sb_dsp_command (0);
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sb_dsp_command (0); */
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RESTORE_INTR (flags);
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dsp_count=cnt;
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irq_mode = IMODE_OUTPUT;
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intr_active = 1;
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}
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static void
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sb16_dsp_start_input (int dev, unsigned long buf, int count,int intrflag, int dma_restart)
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{
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unsigned long flags, cnt;
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cnt = count;
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if (dsp_16bit)
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cnt >>= 1;
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cnt--;
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#ifdef DEB_DMARES
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printk("start_input: %x %d %d\n",buf,count,intrflag);
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if(intrflag) {
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int pos,chan=sound_dsp_dmachan[dev];
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DISABLE_INTR (flags);
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clear_dma_ff(chan);
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disable_dma(chan);
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pos=get_dma_residue(chan);
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enable_dma(chan);
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RESTORE_INTR (flags);
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printk("dmapos=%d %x\n",pos,pos);
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}
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#endif
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if (sound_dma_automode[dev] &&
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intrflag &&
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cnt == dsp_count) {
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irq_mode = IMODE_INPUT;
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intr_active = 1;
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return; /* Auto mode on. No need to react */
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}
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DISABLE_INTR (flags);
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if (dma_restart)
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{
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sb16_dsp_halt(dev);
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DMAbuf_start_dma (dev, buf, count, DMA_MODE_READ);
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}
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sb_dsp_command (0x42);
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sb_dsp_command ((unsigned char)((dsp_current_speed >> 8) & 0xff));
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sb_dsp_command ((unsigned char)(dsp_current_speed & 0xff));
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sb_dsp_command ((unsigned char)(dsp_16bit ? 0xbe : 0xce));
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sb_dsp_command ((unsigned char)((dsp_stereo ? 0x20 : 0) +
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(dsp_16bit ? 0x10:0)));
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sb_dsp_command01 ((unsigned char)(cnt&0xff));
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sb_dsp_command ((unsigned char)(cnt>>8));
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/* sb_dsp_command (0);
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sb_dsp_command (0); */
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RESTORE_INTR (flags);
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dsp_count=cnt;
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irq_mode = IMODE_INPUT;
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intr_active = 1;
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}
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static int
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sb16_dsp_prepare_for_input (int dev, int bsize, int bcount)
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{
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sound_dsp_dmachan[my_dev] = dsp_16bit? dma16:dma8;
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dsp_count = 0;
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dsp_cleanup ();
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return 0;
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}
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static int
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sb16_dsp_prepare_for_output (int dev, int bsize, int bcount)
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{
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sound_dsp_dmachan[my_dev] = dsp_16bit? dma16:dma8;
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dsp_count = 0;
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dsp_cleanup ();
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return 0;
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}
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static void
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dsp_cleanup (void)
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{
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irq_mode = IMODE_NONE;
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intr_active = 0;
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}
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static void
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sb16_dsp_reset (int dev)
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{
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unsigned long flags;
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DISABLE_INTR (flags);
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sb_reset_dsp ();
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dsp_cleanup ();
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RESTORE_INTR (flags);
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}
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static void
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sb16_dsp_halt (int dev)
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{
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if (dsp_16bit)
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{
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sb_dsp_command01(0xd9);
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sb_dsp_command01(0xd5);
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}
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else
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{
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sb_dsp_command01(0xda);
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sb_dsp_command01(0xd0);
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}
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}
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static void
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set_irq_hw(int level) {
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int ival;
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switch(level) {
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case 5:
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ival=2; break;
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case 7:
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ival=4; break;
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case 10:
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ival=8; break;
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default:
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printk("SB16_IRQ_LEVEL %d does not exist\n",level);
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return;
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}
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sb_setmixer(IRQ_NR,ival);
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}
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long
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sb16_dsp_init (long mem_start, struct address_info *hw_config)
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{
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int i, major, minor;
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major = minor = 0;
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sb_dsp_command (0xe1); /* Get version */
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for (i = 1000; i; i--) {
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if (INB (DSP_DATA_AVAIL) & 0x80)
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{ /* wait for Data Ready */
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if (major == 0)
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major = INB (DSP_READ);
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else
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{
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minor = INB (DSP_READ);
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break;
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}
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}
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}
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#ifndef SCO
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sprintf (sb16_dsp_operations.name, "SoundBlaster 16 %d.%d", major, minor);
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#endif
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printk (" <%s>", sb16_dsp_operations.name);
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if (num_dspdevs < MAX_DSP_DEV)
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{
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dsp_devs[my_dev = num_dspdevs++] = &sb16_dsp_operations;
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sound_dsp_dmachan[my_dev] = hw_config->dma;
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sound_buffcounts[my_dev] = 1;
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sound_buffsizes[my_dev] = DSP_BUFFSIZE;
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sound_dma_automode[my_dev] = 1;
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}
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else
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printk ("SB: Too many DSP devices available\n");
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sb16_dsp_ok = 1;
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return mem_start;
|
|
}
|
|
|
|
int
|
|
sb16_dsp_detect (struct address_info *hw_config)
|
|
{
|
|
struct address_info *sb_config;
|
|
|
|
if (sb16_dsp_ok)
|
|
return 1; /* Already initialized */
|
|
|
|
if (!(sb_config=sound_getconf(SNDCARD_SB)))
|
|
{
|
|
printk("SB16 Error: Plain SB not configured\n");
|
|
return 0;
|
|
}
|
|
|
|
if (sbc_base != hw_config->io_base)
|
|
printk("Warning! SB16 I/O != SB I/O\n");
|
|
|
|
/* sb_setmixer(OPSW,0xf);
|
|
if(sb_getmixer(OPSW)!=0xf)
|
|
return 0; */
|
|
|
|
if (!sb_reset_dsp ())
|
|
return 0;
|
|
|
|
if (hw_config->irq != sb_config->irq)
|
|
{
|
|
printk("SB16 Error: Invalid IRQ number %d/%d\n",
|
|
sb_config->irq, hw_config->irq);
|
|
return 0;
|
|
}
|
|
|
|
if (hw_config->dma < 4)
|
|
if (hw_config->dma != sb_config->dma)
|
|
{
|
|
printk("SB16 Error: Invalid DMA channel %d/%d\n",
|
|
sb_config->dma, hw_config->dma);
|
|
return 0;
|
|
}
|
|
|
|
dma16 = hw_config->dma;
|
|
dma8 = sb_config->dma;
|
|
set_irq_hw(hw_config->irq);
|
|
sb_setmixer(DMA_NR, (1<<hw_config->dma) | (1<<sb_config->dma));
|
|
|
|
DEB(printk ("SoundBlaster 16: IRQ %d DMA %d OK\n",hw_config->irq,hw_config->dma));
|
|
|
|
/*
|
|
dsp_showmessage(0xe3,99);
|
|
*/
|
|
sb16_dsp_ok = 1;
|
|
return 1;
|
|
}
|
|
|
|
void
|
|
sb16_dsp_interrupt (int unused)
|
|
{
|
|
int data;
|
|
data = INB (DSP_DATA_AVL16); /* Interrupt acknowledge */
|
|
|
|
if (intr_active)
|
|
switch (irq_mode)
|
|
{
|
|
case IMODE_OUTPUT:
|
|
intr_active = 0;
|
|
DMAbuf_outputintr (my_dev, 1);
|
|
break;
|
|
|
|
case IMODE_INPUT:
|
|
intr_active = 0;
|
|
DMAbuf_inputintr (my_dev);
|
|
break;
|
|
|
|
default:
|
|
printk ("SoundBlaster: Unexpected interrupt\n");
|
|
}
|
|
}
|
|
#endif
|