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freebsd-dev/sys/i386/isa/sound/ad1848.c
Bruce Evans f313170d3c Updated #includes to 4.4Lite style.
1996-09-10 08:32:01 +00:00

1474 lines
35 KiB
C
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/*
* sound/ad1848.c
*
* The low level driver for the AD1848/CS4248 codec chip which
* is used for example in the MS Sound System.
*
* The CS4231 which is used in the GUS MAX and some other cards is
* upwards compatible with AD1848 and this driver is able to drive it.
*
* Copyright by Hannu Savolainen 1994, 1995
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*
* Modified:
* Riccardo Facchetti 24 Mar 1995
* - Added the Audio Excel DSP 16 initialization routine.
*/
#define DEB(x)
#define DEB1(x)
#include <i386/isa/sound/sound_config.h>
#if defined(CONFIGURE_SOUNDCARD) && !defined(EXCLUDE_AD1848)
#include <i386/isa/sound/ad1848_mixer.h>
#define IMODE_NONE 0
#define IMODE_OUTPUT 1
#define IMODE_INPUT 2
#define IMODE_INIT 3
#define IMODE_MIDI 4
typedef struct
{
int base;
int irq;
int dma_capture, dma_playback;
unsigned char MCE_bit;
unsigned char saved_regs[16];
int speed;
unsigned char speed_bits;
int channels;
int audio_format;
unsigned char format_bits;
int xfer_count;
int irq_mode;
int intr_active;
int opened;
char *chip_name;
int mode;
/* Mixer parameters */
int recmask;
int supported_devices;
int supported_rec_devices;
unsigned short levels[32];
}
ad1848_info;
static int nr_ad1848_devs = 0;
static char irq2dev[16] =
{-1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1};
static char mixer2codec[MAX_MIXER_DEV] =
{0};
static int ad_format_mask[3 /*devc->mode */ ] =
{
0,
AFMT_U8 | AFMT_S16_LE | AFMT_MU_LAW | AFMT_A_LAW,
AFMT_U8 | AFMT_S16_LE | AFMT_MU_LAW | AFMT_A_LAW | AFMT_U16_LE | AFMT_IMA_ADPCM
};
static ad1848_info dev_info[MAX_AUDIO_DEV];
#define io_Index_Addr(d) ((d)->base)
#define io_Indexed_Data(d) ((d)->base+1)
#define io_Status(d) ((d)->base+2)
#define io_Polled_IO(d) ((d)->base+3)
static int ad1848_open (int dev, int mode);
static void ad1848_close (int dev);
static int ad1848_ioctl (int dev, unsigned int cmd, unsigned int arg, int local);
static void ad1848_output_block (int dev, unsigned long buf, int count, int intrflag, int dma_restart);
static void ad1848_start_input (int dev, unsigned long buf, int count, int intrflag, int dma_restart);
static int ad1848_prepare_for_IO (int dev, int bsize, int bcount);
static void ad1848_reset (int dev);
static void ad1848_halt (int dev);
static int
ad_read (ad1848_info * devc, int reg)
{
unsigned long flags;
int x;
int timeout = 100;
while (timeout > 0 && INB (devc->base) == 0x80) /*Are we initializing */
timeout--;
DISABLE_INTR (flags);
OUTB ((unsigned char) (reg & 0xff) | devc->MCE_bit, io_Index_Addr (devc));
x = INB (io_Indexed_Data (devc));
/* printk("(%02x<-%02x) ", reg|devc->MCE_bit, x); */
RESTORE_INTR (flags);
return x;
}
static void
ad_write (ad1848_info * devc, int reg, int data)
{
unsigned long flags;
int timeout = 100;
while (timeout > 0 && INB (devc->base) == 0x80) /*Are we initializing */
timeout--;
DISABLE_INTR (flags);
OUTB ((unsigned char) (reg & 0xff) | devc->MCE_bit, io_Index_Addr (devc));
OUTB ((unsigned char) (data & 0xff), io_Indexed_Data (devc));
/* printk("(%02x->%02x) ", reg|devc->MCE_bit, data); */
RESTORE_INTR (flags);
}
static void
wait_for_calibration (ad1848_info * devc)
{
int timeout = 0;
/*
* Wait until the auto calibration process has finished.
*
* 1) Wait until the chip becomes ready (reads don't return 0x80).
* 2) Wait until the ACI bit of I11 gets on and then off.
*/
timeout = 100000;
while (timeout > 0 && INB (devc->base) & 0x80)
timeout--;
if (INB (devc->base) & 0x80)
printk ("ad1848: Auto calibration timed out(1).\n");
timeout = 100;
while (timeout > 0 && !(ad_read (devc, 11) & 0x20))
timeout--;
if (!(ad_read (devc, 11) & 0x20))
return;
timeout = 10000;
while (timeout > 0 && ad_read (devc, 11) & 0x20)
timeout--;
if (ad_read (devc, 11) & 0x20)
printk ("ad1848: Auto calibration timed out(3).\n");
}
static void
ad_mute (ad1848_info * devc)
{
int i;
unsigned char prev;
/*
* Save old register settings and mute output channels
*/
for (i = 6; i < 8; i++)
{
prev = devc->saved_regs[i] = ad_read (devc, i);
ad_write (devc, i, prev | 0x80);
}
}
static void
ad_unmute (ad1848_info * devc)
{
int i;
/*
* Restore back old volume registers (unmute)
*/
for (i = 6; i < 8; i++)
{
ad_write (devc, i, devc->saved_regs[i] & ~0x80);
}
}
static void
ad_enter_MCE (ad1848_info * devc)
{
unsigned long flags;
int timeout = 1000;
unsigned short prev;
while (timeout > 0 && INB (devc->base) == 0x80) /*Are we initializing */
timeout--;
DISABLE_INTR (flags);
devc->MCE_bit = 0x40;
prev = INB (io_Index_Addr (devc));
if (prev & 0x40)
{
RESTORE_INTR (flags);
return;
}
OUTB (devc->MCE_bit, io_Index_Addr (devc));
RESTORE_INTR (flags);
}
static void
ad_leave_MCE (ad1848_info * devc)
{
unsigned long flags;
unsigned char prev;
int timeout = 1000;
while (timeout > 0 && INB (devc->base) == 0x80) /*Are we initializing */
timeout--;
DISABLE_INTR (flags);
devc->MCE_bit = 0x00;
prev = INB (io_Index_Addr (devc));
OUTB (0x00, io_Index_Addr (devc)); /* Clear the MCE bit */
if (prev & 0x40 == 0) /* Not in MCE mode */
{
RESTORE_INTR (flags);
return;
}
OUTB (0x00, io_Index_Addr (devc)); /* Clear the MCE bit */
wait_for_calibration (devc);
RESTORE_INTR (flags);
}
static int
ad1848_set_recmask (ad1848_info * devc, int mask)
{
unsigned char recdev;
int i, n;
mask &= devc->supported_rec_devices;
n = 0;
for (i = 0; i < 32; i++) /* Count selected device bits */
if (mask & (1 << i))
n++;
if (n == 0)
mask = SOUND_MASK_MIC;
else if (n != 1) /* Too many devices selected */
{
mask &= ~devc->recmask; /* Filter out active settings */
n = 0;
for (i = 0; i < 32; i++) /* Count selected device bits */
if (mask & (1 << i))
n++;
if (n != 1)
mask = SOUND_MASK_MIC;
}
switch (mask)
{
case SOUND_MASK_MIC:
recdev = 2;
break;
case SOUND_MASK_LINE:
case SOUND_MASK_LINE3:
recdev = 0;
break;
case SOUND_MASK_CD:
case SOUND_MASK_LINE1:
recdev = 1;
break;
default:
mask = SOUND_MASK_MIC;
recdev = 2;
}
recdev <<= 6;
ad_write (devc, 0, (ad_read (devc, 0) & 0x3f) | recdev);
ad_write (devc, 1, (ad_read (devc, 1) & 0x3f) | recdev);
devc->recmask = mask;
return mask;
}
static void
change_bits (unsigned char *regval, int dev, int chn, int newval)
{
unsigned char mask;
int shift;
if (mix_devices[dev][chn].polarity == 1) /* Reverse */
newval = 100 - newval;
mask = (1 << mix_devices[dev][chn].nbits) - 1;
shift = mix_devices[dev][chn].bitpos;
newval = (int) ((newval * mask) + 50) / 100; /* Scale it */
*regval &= ~(mask << shift); /* Clear bits */
*regval |= (newval & mask) << shift; /* Set new value */
}
static int
ad1848_mixer_get (ad1848_info * devc, int dev)
{
if (!((1 << dev) & devc->supported_devices))
return RET_ERROR (EINVAL);
return devc->levels[dev];
}
static int
ad1848_mixer_set (ad1848_info * devc, int dev, int value)
{
int left = value & 0x000000ff;
int right = (value & 0x0000ff00) >> 8;
int regoffs;
unsigned char val;
if (left > 100)
left = 100;
if (right > 100)
right = 100;
if (dev > 31)
return RET_ERROR (EINVAL);
if (!(devc->supported_devices & (1 << dev)))
return RET_ERROR (EINVAL);
if (mix_devices[dev][LEFT_CHN].nbits == 0)
return RET_ERROR (EINVAL);
/*
* Set the left channel
*/
regoffs = mix_devices[dev][LEFT_CHN].regno;
val = ad_read (devc, regoffs);
change_bits (&val, dev, LEFT_CHN, left);
devc->levels[dev] = left | (left << 8);
ad_write (devc, regoffs, val);
devc->saved_regs[regoffs] = val;
/*
* Set the left right
*/
if (mix_devices[dev][RIGHT_CHN].nbits == 0)
return left | (left << 8); /* Was just a mono channel */
regoffs = mix_devices[dev][RIGHT_CHN].regno;
val = ad_read (devc, regoffs);
change_bits (&val, dev, RIGHT_CHN, right);
ad_write (devc, regoffs, val);
devc->saved_regs[regoffs] = val;
devc->levels[dev] = left | (right << 8);
return left | (right << 8);
}
static void
ad1848_mixer_reset (ad1848_info * devc)
{
int i;
devc->recmask = 0;
if (devc->mode == 2)
devc->supported_devices = MODE2_MIXER_DEVICES;
else
devc->supported_devices = MODE1_MIXER_DEVICES;
devc->supported_rec_devices = MODE1_REC_DEVICES;
for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
ad1848_mixer_set (devc, i, devc->levels[i] = default_mixer_levels[i]);
ad1848_set_recmask (devc, SOUND_MASK_MIC);
}
static int
ad1848_mixer_ioctl (int dev, unsigned int cmd, unsigned int arg)
{
ad1848_info *devc;
int codec_dev = mixer2codec[dev];
if (!codec_dev)
return RET_ERROR (ENXIO);
codec_dev--;
devc = (ad1848_info *) audio_devs[codec_dev]->devc;
if (((cmd >> 8) & 0xff) == 'M')
{
if (cmd & IOC_IN)
switch (cmd & 0xff)
{
case SOUND_MIXER_RECSRC:
return IOCTL_OUT (arg, ad1848_set_recmask (devc, IOCTL_IN (arg)));
break;
default:
return IOCTL_OUT (arg, ad1848_mixer_set (devc, cmd & 0xff, IOCTL_IN (arg)));
}
else
switch (cmd & 0xff) /*
* Return parameters
*/
{
case SOUND_MIXER_RECSRC:
return IOCTL_OUT (arg, devc->recmask);
break;
case SOUND_MIXER_DEVMASK:
return IOCTL_OUT (arg, devc->supported_devices);
break;
case SOUND_MIXER_STEREODEVS:
return IOCTL_OUT (arg, devc->supported_devices &
~(SOUND_MASK_SPEAKER | SOUND_MASK_IMIX));
break;
case SOUND_MIXER_RECMASK:
return IOCTL_OUT (arg, devc->supported_rec_devices);
break;
case SOUND_MIXER_CAPS:
return IOCTL_OUT (arg, SOUND_CAP_EXCL_INPUT);
break;
default:
return IOCTL_OUT (arg, ad1848_mixer_get (devc, cmd & 0xff));
}
}
else
return RET_ERROR (EINVAL);
}
static struct audio_operations ad1848_pcm_operations[MAX_AUDIO_DEV] =
{
{
"Generic AD1848 codec",
DMA_AUTOMODE,
AFMT_U8, /* Will be set later */
NULL,
ad1848_open,
ad1848_close,
ad1848_output_block,
ad1848_start_input,
ad1848_ioctl,
ad1848_prepare_for_IO,
ad1848_prepare_for_IO,
ad1848_reset,
ad1848_halt,
NULL,
NULL
}};
static struct mixer_operations ad1848_mixer_operations =
{
"AD1848/CS4248/CS4231",
ad1848_mixer_ioctl
};
static int
ad1848_open (int dev, int mode)
{
int err;
ad1848_info *devc = NULL;
unsigned long flags;
DEB (printk ("ad1848_open(int mode = %X)\n", mode));
if (dev < 0 || dev >= num_audiodevs)
return RET_ERROR (ENXIO);
devc = (ad1848_info *) audio_devs[dev]->devc;
DISABLE_INTR (flags);
if (devc->opened)
{
RESTORE_INTR (flags);
printk ("ad1848: Already opened\n");
return RET_ERROR (EBUSY);
}
if (devc->irq) /* Not managed by another driver */
if ((err = snd_set_irq_handler (devc->irq, ad1848_interrupt,
audio_devs[dev]->name)) < 0)
{
printk ("ad1848: IRQ in use\n");
RESTORE_INTR (flags);
return err;
}
if (DMAbuf_open_dma (dev) < 0)
{
RESTORE_INTR (flags);
printk ("ad1848: DMA in use\n");
return RET_ERROR (EBUSY);
}
devc->intr_active = 0;
devc->opened = 1;
RESTORE_INTR (flags);
return 0;
}
static void
ad1848_close (int dev)
{
unsigned long flags;
ad1848_info *devc = (ad1848_info *) audio_devs[dev]->devc;
DEB (printk ("ad1848_close(void)\n"));
DISABLE_INTR (flags);
devc->intr_active = 0;
if (devc->irq) /* Not managed by another driver */
snd_release_irq (devc->irq);
ad1848_reset (dev);
DMAbuf_close_dma (dev);
devc->opened = 0;
RESTORE_INTR (flags);
}
static int
set_speed (ad1848_info * devc, int arg)
{
/*
* The sampling speed is encoded in the least significant nible of I8. The
* LSB selects the clock source (0=24.576 MHz, 1=16.9344 Mhz) and other
* three bits select the divisor (indirectly):
*
* The available speeds are in the following table. Keep the speeds in
* the increasing order.
*/
typedef struct
{
int speed;
unsigned char bits;
}
speed_struct;
static speed_struct speed_table[] =
{
{5510, (0 << 1) | 1},
{5510, (0 << 1) | 1},
{6620, (7 << 1) | 1},
{8000, (0 << 1) | 0},
{9600, (7 << 1) | 0},
{11025, (1 << 1) | 1},
{16000, (1 << 1) | 0},
{18900, (2 << 1) | 1},
{22050, (3 << 1) | 1},
{27420, (2 << 1) | 0},
{32000, (3 << 1) | 0},
{33075, (6 << 1) | 1},
{37800, (4 << 1) | 1},
{44100, (5 << 1) | 1},
{48000, (6 << 1) | 0}
};
int i, n, selected = -1;
n = sizeof (speed_table) / sizeof (speed_struct);
if (arg < speed_table[0].speed)
selected = 0;
if (arg > speed_table[n - 1].speed)
selected = n - 1;
for (i = 1 /*really */ ; selected == -1 && i < n; i++)
if (speed_table[i].speed == arg)
selected = i;
else if (speed_table[i].speed > arg)
{
int diff1, diff2;
diff1 = arg - speed_table[i - 1].speed;
diff2 = speed_table[i].speed - arg;
if (diff1 < diff2)
selected = i - 1;
else
selected = i;
}
if (selected == -1)
{
printk ("ad1848: Can't find speed???\n");
selected = 3;
}
devc->speed = speed_table[selected].speed;
devc->speed_bits = speed_table[selected].bits;
return devc->speed;
}
static int
set_channels (ad1848_info * devc, int arg)
{
if (arg != 1 && arg != 2)
return devc->channels;
devc->channels = arg;
return arg;
}
static int
set_format (ad1848_info * devc, int arg)
{
static struct format_tbl
{
int format;
unsigned char bits;
}
format2bits[] =
{
{
0, 0
}
,
{
AFMT_MU_LAW, 1
}
,
{
AFMT_A_LAW, 3
}
,
{
AFMT_IMA_ADPCM, 5
}
,
{
AFMT_U8, 0
}
,
{
AFMT_S16_LE, 2
}
,
{
AFMT_S16_BE, 6
}
,
{
AFMT_S8, 0
}
,
{
AFMT_U16_LE, 0
}
,
{
AFMT_U16_BE, 0
}
};
int i, n = sizeof (format2bits) / sizeof (struct format_tbl);
if (!(arg & ad_format_mask[devc->mode]))
arg = AFMT_U8;
devc->audio_format = arg;
for (i = 0; i < n; i++)
if (format2bits[i].format == arg)
{
if ((devc->format_bits = format2bits[i].bits) == 0)
return devc->audio_format = AFMT_U8; /* Was not supported */
return arg;
}
/* Still hanging here. Something must be terribly wrong */
devc->format_bits = 0;
return devc->audio_format = AFMT_U8;
}
static int
ad1848_ioctl (int dev, unsigned int cmd, unsigned int arg, int local)
{
ad1848_info *devc = (ad1848_info *) audio_devs[dev]->devc;
switch (cmd)
{
case SOUND_PCM_WRITE_RATE:
if (local)
return set_speed (devc, arg);
return IOCTL_OUT (arg, set_speed (devc, IOCTL_IN (arg)));
case SOUND_PCM_READ_RATE:
if (local)
return devc->speed;
return IOCTL_OUT (arg, devc->speed);
case SNDCTL_DSP_STEREO:
if (local)
return set_channels (devc, arg + 1) - 1;
return IOCTL_OUT (arg, set_channels (devc, IOCTL_IN (arg) + 1) - 1);
case SOUND_PCM_WRITE_CHANNELS:
if (local)
return set_channels (devc, arg);
return IOCTL_OUT (arg, set_channels (devc, IOCTL_IN (arg)));
case SOUND_PCM_READ_CHANNELS:
if (local)
return devc->channels;
return IOCTL_OUT (arg, devc->channels);
case SNDCTL_DSP_SAMPLESIZE:
if (local)
return set_format (devc, arg);
return IOCTL_OUT (arg, set_format (devc, IOCTL_IN (arg)));
case SOUND_PCM_READ_BITS:
if (local)
return devc->audio_format;
return IOCTL_OUT (arg, devc->audio_format);
default:;
}
return RET_ERROR (EINVAL);
}
static void
ad1848_output_block (int dev, unsigned long buf, int count, int intrflag, int dma_restart)
{
unsigned long flags, cnt;
ad1848_info *devc = (ad1848_info *) audio_devs[dev]->devc;
cnt = count;
if (devc->audio_format == AFMT_IMA_ADPCM)
{
cnt /= 4;
}
else
{
if (devc->audio_format & (AFMT_S16_LE | AFMT_S16_BE)) /* 16 bit data */
cnt >>= 1;
}
if (devc->channels > 1)
cnt >>= 1;
cnt--;
if (audio_devs[dev]->flags & DMA_AUTOMODE &&
intrflag &&
cnt == devc->xfer_count)
{
devc->irq_mode = IMODE_OUTPUT;
devc->intr_active = 1;
return; /*
* Auto DMA mode on. No need to react
*/
}
DISABLE_INTR (flags);
if (dma_restart)
{
/* ad1848_halt (dev); */
DMAbuf_start_dma (dev, buf, count, DMA_MODE_WRITE);
}
ad_enter_MCE (devc);
ad_write (devc, 15, (unsigned char) (cnt & 0xff));
ad_write (devc, 14, (unsigned char) ((cnt >> 8) & 0xff));
ad_write (devc, 9, 0x0d); /*
* Playback enable, single DMA channel mode,
* auto calibration on.
*/
ad_leave_MCE (devc); /*
* Starts the calibration process and
* enters playback mode after it.
*/
ad_unmute (devc);
devc->xfer_count = cnt;
devc->irq_mode = IMODE_OUTPUT;
devc->intr_active = 1;
INB (io_Status (devc));
OUTB (0, io_Status (devc)); /* Clear pending interrupts */
RESTORE_INTR (flags);
}
static void
ad1848_start_input (int dev, unsigned long buf, int count, int intrflag, int dma_restart)
{
unsigned long flags, cnt;
ad1848_info *devc = (ad1848_info *) audio_devs[dev]->devc;
int count_reg = 14; /* (devc->mode == 1) ? 14 : 30; */
cnt = count;
if (devc->audio_format == AFMT_IMA_ADPCM)
{
cnt /= 4;
}
else
{
if (devc->audio_format & (AFMT_S16_LE | AFMT_S16_BE)) /* 16 bit data */
cnt >>= 1;
}
if (devc->channels > 1)
cnt >>= 1;
cnt--;
if (audio_devs[dev]->flags & DMA_AUTOMODE &&
intrflag &&
cnt == devc->xfer_count)
{
devc->irq_mode = IMODE_INPUT;
devc->intr_active = 1;
return; /*
* Auto DMA mode on. No need to react
*/
}
DISABLE_INTR (flags);
if (dma_restart)
{
/* ad1848_halt (dev); */
DMAbuf_start_dma (dev, buf, count, DMA_MODE_READ);
}
ad_enter_MCE (devc);
ad_write (devc, count_reg + 1, (unsigned char) (cnt & 0xff));
ad_write (devc, count_reg, (unsigned char) ((cnt >> 8) & 0xff));
ad_write (devc, 9, 0x0e); /*
* Capture enable, single DMA channel mode,
* auto calibration on.
*/
ad_leave_MCE (devc); /*
* Starts the calibration process and
* enters playback mode after it.
*/
ad_unmute (devc);
devc->xfer_count = cnt;
devc->irq_mode = IMODE_INPUT;
devc->intr_active = 1;
INB (io_Status (devc));
OUTB (0, io_Status (devc)); /* Clear interrupt status */
RESTORE_INTR (flags);
}
static int
ad1848_prepare_for_IO (int dev, int bsize, int bcount)
{
int timeout;
unsigned char fs;
unsigned long flags;
ad1848_info *devc = (ad1848_info *) audio_devs[dev]->devc;
DISABLE_INTR (flags);
ad_enter_MCE (devc); /* Enables changes to the format select reg */
fs = devc->speed_bits | (devc->format_bits << 5);
if (devc->channels > 1)
fs |= 0x10;
ad_write (devc, 8, fs);
/*
* Write to I8 starts resyncronization. Wait until it completes.
*/
timeout = 10000;
while (timeout > 0 && INB (devc->base) == 0x80)
timeout--;
/*
* If mode == 2 (CS4231), set I28 also. It's the capture format register.
*/
if (devc->mode == 2)
{
ad_write (devc, 28, fs);
/*
* Write to I28 starts resyncronization. Wait until it completes.
*/
timeout = 10000;
while (timeout > 0 && INB (devc->base) == 0x80)
timeout--;
}
ad_leave_MCE (devc); /*
* Starts the calibration process and
* enters playback mode after it.
*/
RESTORE_INTR (flags);
devc->xfer_count = 0;
return 0;
}
static void
ad1848_reset (int dev)
{
ad1848_halt (dev);
}
static void
ad1848_halt (int dev)
{
ad1848_info *devc = (ad1848_info *) audio_devs[dev]->devc;
ad_mute (devc);
ad_write (devc, 9, ad_read (devc, 9) & ~0x03); /* Stop DMA */
OUTB (0, io_Status (devc)); /* Clear interrupt status */
ad_enter_MCE (devc);
OUTB (0, io_Status (devc)); /* Clear interrupt status */
ad_write (devc, 15, 0); /* Clear DMA counter */
ad_write (devc, 14, 0); /* Clear DMA counter */
if (devc->mode == 2)
{
ad_write (devc, 30, 0); /* Clear DMA counter */
ad_write (devc, 31, 0); /* Clear DMA counter */
}
ad_write (devc, 9, ad_read (devc, 9) & ~0x03); /* Stop DMA */
OUTB (0, io_Status (devc)); /* Clear interrupt status */
OUTB (0, io_Status (devc)); /* Clear interrupt status */
ad_leave_MCE (devc);
DMAbuf_reset_dma (dev);
}
int
ad1848_detect (int io_base)
{
unsigned char tmp;
int i;
ad1848_info *devc = &dev_info[nr_ad1848_devs];
unsigned char tmp1 = 0xff, tmp2 = 0xff;
if (nr_ad1848_devs >= MAX_AUDIO_DEV)
{
AUDIO_DDB (printk ("ad1848 detect error - step 0\n"));
return 0;
}
devc->base = io_base;
devc->MCE_bit = 0x40;
devc->irq = 0;
devc->dma_capture = 0;
devc->dma_playback = 0;
devc->opened = 0;
devc->chip_name = "AD1848";
devc->mode = 1; /* MODE1 = original AD1848 */
/*
* Check that the I/O address is in use.
*
* The bit 0x80 of the base I/O port is known to be 0 after the
* chip has performed it's power on initialization. Just assume
* this has happened before the OS is starting.
*
* If the I/O address is unused, it typically returns 0xff.
*/
if ((INB (devc->base) & 0x80) != 0x00) /* Not a AD1884 */
{
AUDIO_DDB (printk ("ad1848 detect error - step A\n"));
return 0;
}
/*
* Test if it's possible to change contents of the indirect registers.
* Registers 0 and 1 are ADC volume registers. The bit 0x10 is read only
* so try to avoid using it.
*/
ad_write (devc, 0, 0xaa);
ad_write (devc, 1, 0x45); /* 0x55 with bit 0x10 clear */
if ((tmp1 = ad_read (devc, 0)) != 0xaa || (tmp2 = ad_read (devc, 1)) != 0x45)
{
AUDIO_DDB (printk ("ad1848 detect error - step B (%x/%x)\n", tmp1, tmp2));
return 0;
}
ad_write (devc, 0, 0x45);
ad_write (devc, 1, 0xaa);
if ((tmp1 = ad_read (devc, 0)) != 0x45 || (tmp2 = ad_read (devc, 1)) != 0xaa)
{
AUDIO_DDB (printk ("ad1848 detect error - step C (%x/%x)\n", tmp1, tmp2));
return 0;
}
/*
* The indirect register I12 has some read only bits. Lets
* try to change them.
*/
tmp = ad_read (devc, 12);
ad_write (devc, 12, (~tmp) & 0x0f);
if ((tmp & 0x0f) != ((tmp1 = ad_read (devc, 12)) & 0x0f))
{
AUDIO_DDB (printk ("ad1848 detect error - step D (%x)\n", tmp1));
return 0;
}
/*
* NOTE! Last 4 bits of the reg I12 tell the chip revision.
* 0x01=RevB and 0x0A=RevC.
*/
/*
* The original AD1848/CS4248 has just 15 indirect registers. This means
* that I0 and I16 should return the same value (etc.).
* Ensure that the Mode2 enable bit of I12 is 0. Otherwise this test fails
* with CS4231.
*/
ad_write (devc, 12, 0); /* Mode2=disabled */
for (i = 0; i < 16; i++)
if ((tmp1 = ad_read (devc, i)) != (tmp2 = ad_read (devc, i + 16)))
{
AUDIO_DDB (printk ("ad1848 detect error - step F(%d/%x/%x)\n", i, tmp1, tmp2));
return 0;
}
/*
* Try to switch the chip to mode2 (CS4231) by setting the MODE2 bit (0x40).
* The bit 0x80 is always 1 in CS4248 and CS4231.
*/
ad_write (devc, 12, 0x40); /* Set mode2, clear 0x80 */
tmp1 = ad_read (devc, 12);
if (tmp1 & 0x80)
devc->chip_name = "CS4248"; /* Our best knowledge just now */
if ((tmp1 & 0xc0) == (0x80 | 0x40))
{
/*
* CS4231 detected - is it?
*
* Verify that setting I0 doesn't change I16.
*/
ad_write (devc, 16, 0); /* Set I16 to known value */
ad_write (devc, 0, 0x45);
if ((tmp1 = ad_read (devc, 16)) != 0x45) /* No change -> CS4231? */
{
ad_write (devc, 0, 0xaa);
if ((tmp1 = ad_read (devc, 16)) == 0xaa) /* Rotten bits? */
{
AUDIO_DDB (printk ("ad1848 detect error - step H(%x)\n", tmp1));
return 0;
}
/*
* Verify that some bits of I25 are read only.
*/
tmp1 = ad_read (devc, 25); /* Original bits */
ad_write (devc, 25, ~tmp1); /* Invert all bits */
if ((ad_read (devc, 25) & 0xe7) == (tmp1 & 0xe7))
{
/*
* It's a CS4231
*/
devc->chip_name = "CS4231";
#ifdef MOZART_PORT
if (devc->base != MOZART_PORT)
#endif
devc->mode = 2;
}
ad_write (devc, 25, tmp1); /* Restore bits */
}
}
return 1;
}
void
ad1848_init (char *name, int io_base, int irq, int dma_playback, int dma_capture)
{
/*
* NOTE! If irq < 0, there is another driver which has allocated the IRQ
* so that this driver doesn't need to allocate/deallocate it.
* The actually used IRQ is ABS(irq).
*/
/*
* Initial values for the indirect registers of CS4248/AD1848.
*/
static int init_values[] =
{
0xa8, 0xa8, 0x08, 0x08, 0x08, 0x08, 0x80, 0x80,
0x00, 0x08, 0x02, 0x00, 0x8a, 0x01, 0x00, 0x00,
/* Positions 16 to 31 just for CS4231 */
0x80, 0x00, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
int i, my_dev;
ad1848_info *devc = &dev_info[nr_ad1848_devs];
if (!ad1848_detect (io_base))
return;
devc->irq = (irq > 0) ? irq : 0;
devc->dma_capture = dma_playback;
devc->dma_playback = dma_capture;
devc->opened = 0;
if (nr_ad1848_devs != 0)
{
memcpy ((char *) &ad1848_pcm_operations[nr_ad1848_devs],
(char *) &ad1848_pcm_operations[0],
sizeof (struct audio_operations));
}
for (i = 0; i < 16; i++)
ad_write (devc, i, init_values[i]);
ad_mute (devc);
if (devc->mode == 2)
{
ad_write (devc, 12, ad_read (devc, 12) | 0x40); /* Mode2 = enabled */
for (i = 16; i < 32; i++)
ad_write (devc, i, init_values[i]);
}
OUTB (0, io_Status (devc)); /* Clear pending interrupts */
if (name[0] != 0)
sprintf (ad1848_pcm_operations[nr_ad1848_devs].name,
"%s (%s)", name, devc->chip_name);
else
sprintf (ad1848_pcm_operations[nr_ad1848_devs].name,
"Generic audio codec (%s)", devc->chip_name);
#if defined(__FreeBSD__)
if (strcmp(name, "MS Sound System")) /* *sigh* */
printk ("\ngus0: <%s>", ad1848_pcm_operations[nr_ad1848_devs].name);
else
printk ("mss0: <%s>", ad1848_pcm_operations[nr_ad1848_devs].name);
#else
printk (" <%s>", ad1848_pcm_operations[nr_ad1848_devs].name);
#endif
if (num_audiodevs < MAX_AUDIO_DEV)
{
audio_devs[my_dev = num_audiodevs++] = &ad1848_pcm_operations[nr_ad1848_devs];
if (irq > 0)
irq2dev[irq] = my_dev;
else if (irq < 0)
irq2dev[-irq] = my_dev;
audio_devs[my_dev]->dmachan = dma_playback;
audio_devs[my_dev]->buffcount = 1;
audio_devs[my_dev]->buffsize = DSP_BUFFSIZE;
audio_devs[my_dev]->devc = devc;
audio_devs[my_dev]->format_mask = ad_format_mask[devc->mode];
nr_ad1848_devs++;
/*
* Toggle the MCE bit. It completes the initialization phase.
*/
ad_enter_MCE (devc); /* In case the bit was off */
ad_leave_MCE (devc);
if (num_mixers < MAX_MIXER_DEV)
{
mixer2codec[num_mixers] = my_dev + 1;
audio_devs[my_dev]->mixer_dev = num_mixers;
mixer_devs[num_mixers++] = &ad1848_mixer_operations;
ad1848_mixer_reset (devc);
}
}
else
printk ("AD1848: Too many PCM devices available\n");
}
void
ad1848_interrupt (INT_HANDLER_PARMS (irq, dummy))
{
unsigned char status;
ad1848_info *devc;
int dev;
if (irq < 0 || irq > 15)
return; /* Bogus irq */
dev = irq2dev[irq];
if (dev < 0 || dev >= num_audiodevs)
return; /* Bogus dev */
devc = (ad1848_info *) audio_devs[dev]->devc;
status = INB (io_Status (devc));
if (status == 0x80)
printk ("ad1848_interrupt: Why?\n");
if (status & 0x01)
{
if (devc->opened && devc->irq_mode == IMODE_OUTPUT)
{
DMAbuf_outputintr (dev, 1);
}
if (devc->opened && devc->irq_mode == IMODE_INPUT)
DMAbuf_inputintr (dev);
}
OUTB (0, io_Status (devc)); /* Clear interrupt status */
status = INB (io_Status (devc));
if (status == 0x80 || status & 0x01)
{
printk ("ad1848: Problems when clearing interrupt, status=%x\n", status);
OUTB (0, io_Status (devc)); /* Try again */
}
}
#ifdef MOZART_PORT
/*
* Experimental initialization sequence for Mozart soundcard
* (OAK OTI-601 sound chip).
* by Gregor Hoffleit <flight@mathi.uni-heidelberg.de>
* Some comments by Hannu Savolainen.
*/
int
mozart_init (int io_base)
{
int i;
unsigned char byte;
static int mozart_detected_here = 0;
/*
* Valid ports are 0x530 and 0xf40. The DOS based software doesn't allow
* other ports. The OTI-601 preliminary specification says that
* 0xe80 and 0x604 are also possible but it's safest to ignore them.
*/
if ((io_base != 0x530) && (io_base != 0xf40))
{
printk ("Mozart: invalid io_base(%x)\n", io_base);
return 0;
}
if (mozart_detected_here == io_base) /* Already detected this card */
return 1;
if (mozart_detected_here != 0)
return 0; /* Don't allow detecting another Mozart card. */
/*
* The Mozart chip (OAK OTI-601) must be enabled before _each_ write
* by writing a secret password (0xE2) to the password register (0xf8f).
* Any I/O cycle after writing the password closes the gate and disbles
* further access.
*/
if (INB (0xf88) != 0) /* Appears to return 0 while the gate is closed */
{
AUDIO_DDB (printk ("No Mozart signature detected on port 0xf88\n"));
return 0;
}
OUTB (0xe2, 0xf8f); /* A secret password which opens the gate */
OUTB (0x10, 0xf91); /* Enable access to codec registers during SB mode */
for (i = 0; i < 100; i++) /* Delay */
tenmicrosec ();
OUTB (0xe2, 0xf8f); /* Sesam */
byte = INB (0xf8d); /* Read MC1 (Mode control register) */
/* Read the same register again but with gate closed at this time. */
if (INB (0xf8d) == 0xff) /* Bus float. Should be 0 if Mozart present */
{
AUDIO_DDB (printk ("Seems to be no Mozart chip set\n"));
return 0;
}
AUDIO_DDB (printk ("mozart_init: read 0x%x on 0xf8d\n", byte));
byte = byte | 0x80; /* Switch to WSS mode (disables SB) */
byte = byte & 0xcf; /* Clear sound base, disable CD, enable joystick */
if (io_base == 0xf40)
byte = byte | 0x20;
for (i = 0; i < 100; i++)
tenmicrosec ();
OUTB (0xe2, 0xf8f); /* Open the gate again */
OUTB (byte, 0xf8d); /* Write the modified value back to MC1 */
AUDIO_DDB (printk ("mozart_init: wrote 0x%x on 0xf8d\n", byte));
OUTB (0xe2, 0xf8f); /* Here we come again */
OUTB (0x20, 0xf91); /* Protect WSS shadow registers against write */
for (i = 0; i < 1000; i++)
tenmicrosec ();
return 1;
}
#endif /* MOZART_PORT */
#ifdef OPTI_MAD16_PORT
#include <i386/isa/sound/mad16.h>
#endif
/*
* Some extra code for the MS Sound System
*/
int
probe_ms_sound (struct address_info *hw_config)
{
#if !defined(EXCLUDE_AEDSP16) && defined(AEDSP16_MSS)
/*
* Initialize Audio Excel DSP 16 to MSS: before any operation
* we must enable MSS I/O ports.
*/
InitAEDSP16_MSS (hw_config);
#endif
/*
* Check if the IO port returns valid signature. The original MS Sound
* system returns 0x04 while some cards (AudioTriX Pro for example)
* return 0x00.
*/
#ifdef MOZART_PORT
if (hw_config->io_base == MOZART_PORT)
mozart_init (hw_config->io_base);
#endif
#ifdef OPTI_MAD16_PORT
if (hw_config->io_base == OPTI_MAD16_PORT)
mad16init (hw_config->io_base);
#endif
if ((INB (hw_config->io_base + 3) & 0x3f) != 0x04 &&
(INB (hw_config->io_base + 3) & 0x3f) != 0x00)
{
AUDIO_DDB (printk ("No MSS signature detected on port 0x%x (0x%x)\n",
hw_config->io_base, INB (hw_config->io_base + 3)));
return 0;
}
if (hw_config->irq > 11)
{
printk ("MSS: Bad IRQ %d\n", hw_config->irq);
return 0;
}
if (hw_config->dma != 0 && hw_config->dma != 1 && hw_config->dma != 3)
{
printk ("MSS: Bad DMA %d\n", hw_config->dma);
return 0;
}
/*
* Check that DMA0 is not in use with a 8 bit board.
*/
if (hw_config->dma == 0 && INB (hw_config->io_base + 3) & 0x80)
{
printk ("MSS: Can't use DMA0 with a 8 bit card/slot\n");
return 0;
}
if (hw_config->irq > 7 && hw_config->irq != 9 && INB (hw_config->io_base + 3) & 0x80)
{
printk ("MSS: Can't use IRQ%d with a 8 bit card/slot\n", hw_config->irq);
return 0;
}
return ad1848_detect (hw_config->io_base + 4);
}
long
attach_ms_sound (long mem_start, struct address_info *hw_config)
{
static char interrupt_bits[12] =
{
-1, -1, -1, -1, -1, -1, -1, 0x08, -1, 0x10, 0x18, 0x20
};
char bits;
static char dma_bits[4] =
{
1, 2, 0, 3
};
int config_port = hw_config->io_base + 0, version_port = hw_config->io_base + 3;
if (!ad1848_detect (hw_config->io_base + 4))
return mem_start;
/*
* Set the IRQ and DMA addresses.
*/
bits = interrupt_bits[hw_config->irq];
if (bits == -1)
return mem_start;
OUTB (bits | 0x40, config_port);
if ((INB (version_port) & 0x40) == 0)
printk ("[IRQ Conflict?]");
OUTB (bits | dma_bits[hw_config->dma], config_port); /* Write IRQ+DMA setup */
ad1848_init ("MS Sound System", hw_config->io_base + 4,
hw_config->irq,
hw_config->dma,
hw_config->dma);
return mem_start;
}
#endif
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