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-
- /*
- * sound/sb_mixer.c
- *
- * The low level mixer driver for the SoundBlaster Pro and SB16 cards.
- *
- * Copyright by Hannu Savolainen 1994
- *
- * 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:
- * Hunyue Yau Jan 6 1994
- * Added code to support the Sound Galaxy NX Pro mixer.
- *
- */
-
- #include "sound_config.h"
-
- #if defined(CONFIGURE_SOUNDCARD) && !defined(EXCLUDE_SB) && !defined(EXCLUDE_SBPRO)
- #define __SB_MIXER_C__
-
- #include "sb.h"
- #include "sb_mixer.h"
- #undef SB_TEST_IRQ
-
- extern int sbc_base;
-
- static int mixer_initialized = 0;
-
- static int supported_rec_devices;
- static int supported_devices;
- static int recmask = 0;
- static int mixer_model;
- static int mixer_caps;
- static mixer_tab *iomap;
-
- void
- sb_setmixer (unsigned int port, unsigned int value)
- {
- unsigned long flags;
-
- DISABLE_INTR (flags);
- OUTB ((unsigned char) (port & 0xff), MIXER_ADDR); /*
- * Select register
- */
- tenmicrosec ();
- OUTB ((unsigned char) (value & 0xff), MIXER_DATA);
- tenmicrosec ();
- RESTORE_INTR (flags);
- }
-
- int
- sb_getmixer (unsigned int port)
- {
- int val;
- unsigned long flags;
-
- DISABLE_INTR (flags);
- OUTB ((unsigned char) (port & 0xff), MIXER_ADDR); /*
- * Select register
- */
- tenmicrosec ();
- val = INB (MIXER_DATA);
- tenmicrosec ();
- RESTORE_INTR (flags);
-
- return val;
- }
-
- void
- sb_mixer_set_stereo (int mode)
- {
- if (!mixer_initialized)
- return;
-
- sb_setmixer (OUT_FILTER, ((sb_getmixer (OUT_FILTER) & ~STEREO_DAC)
- | (mode ? STEREO_DAC : MONO_DAC)));
- }
-
- /*
- * Returns:
- * 0 No mixer detected.
- * 1 Only a plain Sound Blaster Pro style mixer detected.
- * 2 The Sound Galaxy NX Pro mixer detected.
- */
- static int
- detect_mixer (void)
- {
- #ifdef __SGNXPRO__
- int oldbass, oldtreble;
-
- #endif
- int retcode = 1;
-
- /*
- * Detect the mixer by changing parameters of two volume channels. If the
- * values read back match with the values written, the mixer is there (is
- * it?)
- */
- sb_setmixer (FM_VOL, 0xff);
- sb_setmixer (VOC_VOL, 0x33);
-
- if (sb_getmixer (FM_VOL) != 0xff)
- return 0; /*
- * No match
- */
- if (sb_getmixer (VOC_VOL) != 0x33)
- return 0;
-
- #ifdef __SGNXPRO__
- /* Attempt to detect the SG NX Pro by check for valid bass/treble
- * registers.
- */
- oldbass = sb_getmixer (BASS_LVL);
- oldtreble = sb_getmixer (TREBLE_LVL);
-
- sb_setmixer (BASS_LVL, 0xaa);
- sb_setmixer (TREBLE_LVL, 0x55);
-
- if ((sb_getmixer (BASS_LVL) != 0xaa) ||
- (sb_getmixer (TREBLE_LVL) != 0x55))
- {
- retcode = 1; /* 1 == Only SB Pro detected */
- }
- else
- retcode = 2; /* 2 == SG NX Pro detected */
- /* Restore register in either case since SG NX Pro has EEPROM with
- * 'preferred' values stored.
- */
- sb_setmixer (BASS_LVL, oldbass);
- sb_setmixer (TREBLE_LVL, oldtreble);
- #endif
- return retcode;
- }
-
- static void
- change_bits (unsigned char *regval, int dev, int chn, int newval)
- {
- unsigned char mask;
- int shift;
-
- mask = (1 << (*iomap)[dev][chn].nbits) - 1;
- newval = (int) ((newval * mask) + 50) / 100; /*
- * Scale it
- */
-
- shift = (*iomap)[dev][chn].bitoffs - (*iomap)[dev][LEFT_CHN].nbits + 1;
-
- *regval &= ~(mask << shift); /*
- * Filter out the previous value
- */
- *regval |= (newval & mask) << shift; /*
- * Set the new value
- */
- }
-
- static int
- sb_mixer_get (int dev)
- {
- if (!((1 << dev) & supported_devices))
- return RET_ERROR (EINVAL);
-
- return levels[dev];
- }
-
- static int
- sb_mixer_set (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 (!(supported_devices & (1 << dev))) /*
- * Not supported
- */
- return RET_ERROR (EINVAL);
-
- regoffs = (*iomap)[dev][LEFT_CHN].regno;
-
- if (regoffs == 0)
- return RET_ERROR (EINVAL);
-
- val = sb_getmixer (regoffs);
- change_bits (&val, dev, LEFT_CHN, left);
-
- levels[dev] = left | (left << 8);
-
- if ((*iomap)[dev][RIGHT_CHN].regno != regoffs) /*
- * Change register
- */
- {
- sb_setmixer (regoffs, val); /*
- * Save the old one
- */
- regoffs = (*iomap)[dev][RIGHT_CHN].regno;
-
- if (regoffs == 0)
- return left | (left << 8); /*
- * Just left channel present
- */
-
- val = sb_getmixer (regoffs); /*
- * Read the new one
- */
- }
-
- change_bits (&val, dev, RIGHT_CHN, right);
- sb_setmixer (regoffs, val);
-
- levels[dev] = left | (right << 8);
- return left | (right << 8);
- }
-
- static void
- set_recsrc (int src)
- {
- sb_setmixer (RECORD_SRC, (sb_getmixer (RECORD_SRC) & ~7) | (src & 0x7));
- }
-
- static int
- set_recmask (int mask)
- {
- int devmask, i;
- unsigned char regimageL, regimageR;
-
- devmask = mask & supported_rec_devices;
-
- switch (mixer_model)
- {
- case 3:
-
- if (devmask != SOUND_MASK_MIC &&
- devmask != SOUND_MASK_LINE &&
- devmask != SOUND_MASK_CD)
- { /*
- * More than one devices selected. Drop the *
- * previous selection
- */
- devmask &= ~recmask;
- }
-
- if (devmask != SOUND_MASK_MIC &&
- devmask != SOUND_MASK_LINE &&
- devmask != SOUND_MASK_CD)
- { /*
- * More than one devices selected. Default to
- * * mic
- */
- devmask = SOUND_MASK_MIC;
- }
-
-
- if (devmask ^ recmask) /*
- * Input source changed
- */
- {
- switch (devmask)
- {
-
- case SOUND_MASK_MIC:
- set_recsrc (SRC_MIC);
- break;
-
- case SOUND_MASK_LINE:
- set_recsrc (SRC_LINE);
- break;
-
- case SOUND_MASK_CD:
- set_recsrc (SRC_CD);
- break;
-
- default:
- set_recsrc (SRC_MIC);
- }
- }
-
- break;
-
- case 4:
- if (!devmask)
- devmask = SOUND_MASK_MIC;
-
- regimageL = regimageR = 0;
- for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
- if ((1 << i) & devmask)
- {
- regimageL |= sb16_recmasks_L[i];
- regimageR |= sb16_recmasks_R[i];
- }
- sb_setmixer (SB16_IMASK_L, regimageL);
- sb_setmixer (SB16_IMASK_R, regimageR);
- break;
- }
-
- recmask = devmask;
- return recmask;
- }
-
- static int
- sb_mixer_ioctl (int dev, unsigned int cmd, unsigned int arg)
- {
- if (((cmd >> 8) & 0xff) == 'M')
- {
- if (cmd & IOC_IN)
- switch (cmd & 0xff)
- {
- case SOUND_MIXER_RECSRC:
- return IOCTL_OUT (arg, set_recmask (IOCTL_IN (arg)));
- break;
-
- default:
- return IOCTL_OUT (arg, sb_mixer_set (cmd & 0xff, IOCTL_IN (arg)));
- }
- else
- switch (cmd & 0xff) /*
- * Return parameters
- */
- {
-
- case SOUND_MIXER_RECSRC:
- return IOCTL_OUT (arg, recmask);
- break;
-
- case SOUND_MIXER_DEVMASK:
- return IOCTL_OUT (arg, supported_devices);
- break;
-
- case SOUND_MIXER_STEREODEVS:
- return IOCTL_OUT (arg, supported_devices &
- ~(SOUND_MASK_MIC | SOUND_MASK_SPEAKER));
- break;
-
- case SOUND_MIXER_RECMASK:
- return IOCTL_OUT (arg, supported_rec_devices);
- break;
-
- case SOUND_MIXER_CAPS:
- return IOCTL_OUT (arg, mixer_caps);
- break;
-
- default:
- return IOCTL_OUT (arg, sb_mixer_get (cmd & 0xff));
- }
- }
- else
- return RET_ERROR (EINVAL);
- }
-
- static struct mixer_operations sb_mixer_operations =
- {
- sb_mixer_ioctl
- };
-
- static void
- sb_mixer_reset (void)
- {
- int i;
-
- for (i = 0; i < SOUND_MIXER_NRDEVICES; i++)
- sb_mixer_set (i, levels[i]);
- set_recmask (SOUND_MASK_MIC);
- }
-
- /*
- * Returns a code depending on whether a SG NX Pro was detected.
- * 1 == Plain SB Pro
- * 2 == SG NX Pro detected.
- * 3 == SB16
- *
- * Used to update message.
- */
- int
- sb_mixer_init (int major_model)
- {
- int mixer_type = 0;
-
- sb_setmixer (0x00, 0); /* Reset mixer */
-
- if (!(mixer_type = detect_mixer ()))
- return 0; /* No mixer. Why? */
-
- mixer_initialized = 1;
- mixer_model = major_model;
-
- switch (major_model)
- {
- case 3:
- mixer_caps = SOUND_CAP_EXCL_INPUT;
- #ifdef __SGNXPRO__
- if (mixer_type == 2) /* A SGNXPRO was detected */
- {
- supported_devices = SGNXPRO_MIXER_DEVICES;
- supported_rec_devices = SGNXPRO_RECORDING_DEVICES;
- iomap = &sgnxpro_mix;
- }
- else
- #endif
- {
- supported_devices = SBPRO_MIXER_DEVICES;
- supported_rec_devices = SBPRO_RECORDING_DEVICES;
- iomap = &sbpro_mix;
- mixer_type = 1;
- }
- break;
-
- case 4:
- mixer_caps = 0;
- supported_devices = SB16_MIXER_DEVICES;
- supported_rec_devices = SB16_RECORDING_DEVICES;
- iomap = &sb16_mix;
- mixer_type = 3;
- break;
-
- default:
- printk ("SB Warning: Unsupported mixer type\n");
- return 0;
- }
-
- if (num_mixers < MAX_MIXER_DEV)
- mixer_devs[num_mixers++] = &sb_mixer_operations;
- sb_mixer_reset ();
- return mixer_type;
- }
-
- #endif
-