diff options
Diffstat (limited to 'sound/isa/sb/emu8000_callback.c')
| -rw-r--r-- | sound/isa/sb/emu8000_callback.c | 547 |
1 files changed, 547 insertions, 0 deletions
diff --git a/sound/isa/sb/emu8000_callback.c b/sound/isa/sb/emu8000_callback.c new file mode 100644 index 000000000..5a485504f --- /dev/null +++ b/sound/isa/sb/emu8000_callback.c @@ -0,0 +1,547 @@ +/* + * synth callback routines for the emu8000 (AWE32/64) + * + * Copyright (C) 1999 Steve Ratcliffe + * Copyright (C) 1999-2000 Takashi Iwai <tiwai@suse.de> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include "emu8000_local.h" +#include <linux/export.h> +#include <sound/asoundef.h> + +/* + * prototypes + */ +static struct snd_emux_voice *get_voice(struct snd_emux *emu, + struct snd_emux_port *port); +static int start_voice(struct snd_emux_voice *vp); +static void trigger_voice(struct snd_emux_voice *vp); +static void release_voice(struct snd_emux_voice *vp); +static void update_voice(struct snd_emux_voice *vp, int update); +static void reset_voice(struct snd_emux *emu, int ch); +static void terminate_voice(struct snd_emux_voice *vp); +static void sysex(struct snd_emux *emu, char *buf, int len, int parsed, + struct snd_midi_channel_set *chset); +#if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS) +static int oss_ioctl(struct snd_emux *emu, int cmd, int p1, int p2); +#endif +static int load_fx(struct snd_emux *emu, int type, int mode, + const void __user *buf, long len); + +static void set_pitch(struct snd_emu8000 *hw, struct snd_emux_voice *vp); +static void set_volume(struct snd_emu8000 *hw, struct snd_emux_voice *vp); +static void set_pan(struct snd_emu8000 *hw, struct snd_emux_voice *vp); +static void set_fmmod(struct snd_emu8000 *hw, struct snd_emux_voice *vp); +static void set_tremfreq(struct snd_emu8000 *hw, struct snd_emux_voice *vp); +static void set_fm2frq2(struct snd_emu8000 *hw, struct snd_emux_voice *vp); +static void set_filterQ(struct snd_emu8000 *hw, struct snd_emux_voice *vp); +static void snd_emu8000_tweak_voice(struct snd_emu8000 *emu, int ch); + +/* + * Ensure a value is between two points + * macro evaluates its args more than once, so changed to upper-case. + */ +#define LIMITVALUE(x, a, b) do { if ((x) < (a)) (x) = (a); else if ((x) > (b)) (x) = (b); } while (0) +#define LIMITMAX(x, a) do {if ((x) > (a)) (x) = (a); } while (0) + + +/* + * set up operators + */ +static const struct snd_emux_operators emu8000_ops = { + .owner = THIS_MODULE, + .get_voice = get_voice, + .prepare = start_voice, + .trigger = trigger_voice, + .release = release_voice, + .update = update_voice, + .terminate = terminate_voice, + .reset = reset_voice, + .sample_new = snd_emu8000_sample_new, + .sample_free = snd_emu8000_sample_free, + .sample_reset = snd_emu8000_sample_reset, + .load_fx = load_fx, + .sysex = sysex, +#if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS) + .oss_ioctl = oss_ioctl, +#endif +}; + +void +snd_emu8000_ops_setup(struct snd_emu8000 *hw) +{ + hw->emu->ops = emu8000_ops; +} + + + +/* + * Terminate a voice + */ +static void +release_voice(struct snd_emux_voice *vp) +{ + int dcysusv; + struct snd_emu8000 *hw; + + hw = vp->hw; + dcysusv = 0x8000 | (unsigned char)vp->reg.parm.modrelease; + EMU8000_DCYSUS_WRITE(hw, vp->ch, dcysusv); + dcysusv = 0x8000 | (unsigned char)vp->reg.parm.volrelease; + EMU8000_DCYSUSV_WRITE(hw, vp->ch, dcysusv); +} + + +/* + */ +static void +terminate_voice(struct snd_emux_voice *vp) +{ + struct snd_emu8000 *hw; + + hw = vp->hw; + EMU8000_DCYSUSV_WRITE(hw, vp->ch, 0x807F); +} + + +/* + */ +static void +update_voice(struct snd_emux_voice *vp, int update) +{ + struct snd_emu8000 *hw; + + hw = vp->hw; + if (update & SNDRV_EMUX_UPDATE_VOLUME) + set_volume(hw, vp); + if (update & SNDRV_EMUX_UPDATE_PITCH) + set_pitch(hw, vp); + if ((update & SNDRV_EMUX_UPDATE_PAN) && + vp->port->ctrls[EMUX_MD_REALTIME_PAN]) + set_pan(hw, vp); + if (update & SNDRV_EMUX_UPDATE_FMMOD) + set_fmmod(hw, vp); + if (update & SNDRV_EMUX_UPDATE_TREMFREQ) + set_tremfreq(hw, vp); + if (update & SNDRV_EMUX_UPDATE_FM2FRQ2) + set_fm2frq2(hw, vp); + if (update & SNDRV_EMUX_UPDATE_Q) + set_filterQ(hw, vp); +} + + +/* + * Find a channel (voice) within the EMU that is not in use or at least + * less in use than other channels. Always returns a valid pointer + * no matter what. If there is a real shortage of voices then one + * will be cut. Such is life. + * + * The channel index (vp->ch) must be initialized in this routine. + * In Emu8k, it is identical with the array index. + */ +static struct snd_emux_voice * +get_voice(struct snd_emux *emu, struct snd_emux_port *port) +{ + int i; + struct snd_emux_voice *vp; + struct snd_emu8000 *hw; + + /* what we are looking for, in order of preference */ + enum { + OFF=0, RELEASED, PLAYING, END + }; + + /* Keeps track of what we are finding */ + struct best { + unsigned int time; + int voice; + } best[END]; + struct best *bp; + + hw = emu->hw; + + for (i = 0; i < END; i++) { + best[i].time = (unsigned int)(-1); /* XXX MAX_?INT really */ + best[i].voice = -1; + } + + /* + * Go through them all and get a best one to use. + */ + for (i = 0; i < emu->max_voices; i++) { + int state, val; + + vp = &emu->voices[i]; + state = vp->state; + + if (state == SNDRV_EMUX_ST_OFF) + bp = best + OFF; + else if (state == SNDRV_EMUX_ST_RELEASED || + state == SNDRV_EMUX_ST_PENDING) { + bp = best + RELEASED; + val = (EMU8000_CVCF_READ(hw, vp->ch) >> 16) & 0xffff; + if (! val) + bp = best + OFF; + } + else if (state & SNDRV_EMUX_ST_ON) + bp = best + PLAYING; + else + continue; + + /* check if sample is finished playing (non-looping only) */ + if (state != SNDRV_EMUX_ST_OFF && + (vp->reg.sample_mode & SNDRV_SFNT_SAMPLE_SINGLESHOT)) { + val = EMU8000_CCCA_READ(hw, vp->ch) & 0xffffff; + if (val >= vp->reg.loopstart) + bp = best + OFF; + } + + if (vp->time < bp->time) { + bp->time = vp->time; + bp->voice = i; + } + } + + for (i = 0; i < END; i++) { + if (best[i].voice >= 0) { + vp = &emu->voices[best[i].voice]; + vp->ch = best[i].voice; + return vp; + } + } + + /* not found */ + return NULL; +} + +/* + */ +static int +start_voice(struct snd_emux_voice *vp) +{ + unsigned int temp; + int ch; + int addr; + struct snd_midi_channel *chan; + struct snd_emu8000 *hw; + + hw = vp->hw; + ch = vp->ch; + chan = vp->chan; + + /* channel to be silent and idle */ + EMU8000_DCYSUSV_WRITE(hw, ch, 0x0080); + EMU8000_VTFT_WRITE(hw, ch, 0x0000FFFF); + EMU8000_CVCF_WRITE(hw, ch, 0x0000FFFF); + EMU8000_PTRX_WRITE(hw, ch, 0); + EMU8000_CPF_WRITE(hw, ch, 0); + + /* set pitch offset */ + set_pitch(hw, vp); + + /* set envelope parameters */ + EMU8000_ENVVAL_WRITE(hw, ch, vp->reg.parm.moddelay); + EMU8000_ATKHLD_WRITE(hw, ch, vp->reg.parm.modatkhld); + EMU8000_DCYSUS_WRITE(hw, ch, vp->reg.parm.moddcysus); + EMU8000_ENVVOL_WRITE(hw, ch, vp->reg.parm.voldelay); + EMU8000_ATKHLDV_WRITE(hw, ch, vp->reg.parm.volatkhld); + /* decay/sustain parameter for volume envelope is used + for triggerg the voice */ + + /* cutoff and volume */ + set_volume(hw, vp); + + /* modulation envelope heights */ + EMU8000_PEFE_WRITE(hw, ch, vp->reg.parm.pefe); + + /* lfo1/2 delay */ + EMU8000_LFO1VAL_WRITE(hw, ch, vp->reg.parm.lfo1delay); + EMU8000_LFO2VAL_WRITE(hw, ch, vp->reg.parm.lfo2delay); + + /* lfo1 pitch & cutoff shift */ + set_fmmod(hw, vp); + /* lfo1 volume & freq */ + set_tremfreq(hw, vp); + /* lfo2 pitch & freq */ + set_fm2frq2(hw, vp); + /* pan & loop start */ + set_pan(hw, vp); + + /* chorus & loop end (chorus 8bit, MSB) */ + addr = vp->reg.loopend - 1; + temp = vp->reg.parm.chorus; + temp += (int)chan->control[MIDI_CTL_E3_CHORUS_DEPTH] * 9 / 10; + LIMITMAX(temp, 255); + temp = (temp <<24) | (unsigned int)addr; + EMU8000_CSL_WRITE(hw, ch, temp); + + /* Q & current address (Q 4bit value, MSB) */ + addr = vp->reg.start - 1; + temp = vp->reg.parm.filterQ; + temp = (temp<<28) | (unsigned int)addr; + EMU8000_CCCA_WRITE(hw, ch, temp); + + /* clear unknown registers */ + EMU8000_00A0_WRITE(hw, ch, 0); + EMU8000_0080_WRITE(hw, ch, 0); + + /* reset volume */ + temp = vp->vtarget << 16; + EMU8000_VTFT_WRITE(hw, ch, temp | vp->ftarget); + EMU8000_CVCF_WRITE(hw, ch, temp | 0xff00); + + return 0; +} + +/* + * Start envelope + */ +static void +trigger_voice(struct snd_emux_voice *vp) +{ + int ch = vp->ch; + unsigned int temp; + struct snd_emu8000 *hw; + + hw = vp->hw; + + /* set reverb and pitch target */ + temp = vp->reg.parm.reverb; + temp += (int)vp->chan->control[MIDI_CTL_E1_REVERB_DEPTH] * 9 / 10; + LIMITMAX(temp, 255); + temp = (temp << 8) | (vp->ptarget << 16) | vp->aaux; + EMU8000_PTRX_WRITE(hw, ch, temp); + EMU8000_CPF_WRITE(hw, ch, vp->ptarget << 16); + EMU8000_DCYSUSV_WRITE(hw, ch, vp->reg.parm.voldcysus); +} + +/* + * reset voice parameters + */ +static void +reset_voice(struct snd_emux *emu, int ch) +{ + struct snd_emu8000 *hw; + + hw = emu->hw; + EMU8000_DCYSUSV_WRITE(hw, ch, 0x807F); + snd_emu8000_tweak_voice(hw, ch); +} + +/* + * Set the pitch of a possibly playing note. + */ +static void +set_pitch(struct snd_emu8000 *hw, struct snd_emux_voice *vp) +{ + EMU8000_IP_WRITE(hw, vp->ch, vp->apitch); +} + +/* + * Set the volume of a possibly already playing note + */ +static void +set_volume(struct snd_emu8000 *hw, struct snd_emux_voice *vp) +{ + int ifatn; + + ifatn = (unsigned char)vp->acutoff; + ifatn = (ifatn << 8); + ifatn |= (unsigned char)vp->avol; + EMU8000_IFATN_WRITE(hw, vp->ch, ifatn); +} + +/* + * Set pan and loop start address. + */ +static void +set_pan(struct snd_emu8000 *hw, struct snd_emux_voice *vp) +{ + unsigned int temp; + + temp = ((unsigned int)vp->apan<<24) | ((unsigned int)vp->reg.loopstart - 1); + EMU8000_PSST_WRITE(hw, vp->ch, temp); +} + +#define MOD_SENSE 18 + +static void +set_fmmod(struct snd_emu8000 *hw, struct snd_emux_voice *vp) +{ + unsigned short fmmod; + short pitch; + unsigned char cutoff; + int modulation; + + pitch = (char)(vp->reg.parm.fmmod>>8); + cutoff = (vp->reg.parm.fmmod & 0xff); + modulation = vp->chan->gm_modulation + vp->chan->midi_pressure; + pitch += (MOD_SENSE * modulation) / 1200; + LIMITVALUE(pitch, -128, 127); + fmmod = ((unsigned char)pitch<<8) | cutoff; + EMU8000_FMMOD_WRITE(hw, vp->ch, fmmod); +} + +/* set tremolo (lfo1) volume & frequency */ +static void +set_tremfreq(struct snd_emu8000 *hw, struct snd_emux_voice *vp) +{ + EMU8000_TREMFRQ_WRITE(hw, vp->ch, vp->reg.parm.tremfrq); +} + +/* set lfo2 pitch & frequency */ +static void +set_fm2frq2(struct snd_emu8000 *hw, struct snd_emux_voice *vp) +{ + unsigned short fm2frq2; + short pitch; + unsigned char freq; + int modulation; + + pitch = (char)(vp->reg.parm.fm2frq2>>8); + freq = vp->reg.parm.fm2frq2 & 0xff; + modulation = vp->chan->gm_modulation + vp->chan->midi_pressure; + pitch += (MOD_SENSE * modulation) / 1200; + LIMITVALUE(pitch, -128, 127); + fm2frq2 = ((unsigned char)pitch<<8) | freq; + EMU8000_FM2FRQ2_WRITE(hw, vp->ch, fm2frq2); +} + +/* set filterQ */ +static void +set_filterQ(struct snd_emu8000 *hw, struct snd_emux_voice *vp) +{ + unsigned int addr; + addr = EMU8000_CCCA_READ(hw, vp->ch) & 0xffffff; + addr |= (vp->reg.parm.filterQ << 28); + EMU8000_CCCA_WRITE(hw, vp->ch, addr); +} + +/* + * set the envelope & LFO parameters to the default values + */ +static void +snd_emu8000_tweak_voice(struct snd_emu8000 *emu, int i) +{ + /* set all mod/vol envelope shape to minimum */ + EMU8000_ENVVOL_WRITE(emu, i, 0x8000); + EMU8000_ENVVAL_WRITE(emu, i, 0x8000); + EMU8000_DCYSUS_WRITE(emu, i, 0x7F7F); + EMU8000_ATKHLDV_WRITE(emu, i, 0x7F7F); + EMU8000_ATKHLD_WRITE(emu, i, 0x7F7F); + EMU8000_PEFE_WRITE(emu, i, 0); /* mod envelope height to zero */ + EMU8000_LFO1VAL_WRITE(emu, i, 0x8000); /* no delay for LFO1 */ + EMU8000_LFO2VAL_WRITE(emu, i, 0x8000); + EMU8000_IP_WRITE(emu, i, 0xE000); /* no pitch shift */ + EMU8000_IFATN_WRITE(emu, i, 0xFF00); /* volume to minimum */ + EMU8000_FMMOD_WRITE(emu, i, 0); + EMU8000_TREMFRQ_WRITE(emu, i, 0); + EMU8000_FM2FRQ2_WRITE(emu, i, 0); +} + +/* + * sysex callback + */ +static void +sysex(struct snd_emux *emu, char *buf, int len, int parsed, struct snd_midi_channel_set *chset) +{ + struct snd_emu8000 *hw; + + hw = emu->hw; + + switch (parsed) { + case SNDRV_MIDI_SYSEX_GS_CHORUS_MODE: + hw->chorus_mode = chset->gs_chorus_mode; + snd_emu8000_update_chorus_mode(hw); + break; + + case SNDRV_MIDI_SYSEX_GS_REVERB_MODE: + hw->reverb_mode = chset->gs_reverb_mode; + snd_emu8000_update_reverb_mode(hw); + break; + } +} + + +#if IS_ENABLED(CONFIG_SND_SEQUENCER_OSS) +/* + * OSS ioctl callback + */ +static int +oss_ioctl(struct snd_emux *emu, int cmd, int p1, int p2) +{ + struct snd_emu8000 *hw; + + hw = emu->hw; + + switch (cmd) { + case _EMUX_OSS_REVERB_MODE: + hw->reverb_mode = p1; + snd_emu8000_update_reverb_mode(hw); + break; + + case _EMUX_OSS_CHORUS_MODE: + hw->chorus_mode = p1; + snd_emu8000_update_chorus_mode(hw); + break; + + case _EMUX_OSS_INITIALIZE_CHIP: + /* snd_emu8000_init(hw); */ /*ignored*/ + break; + + case _EMUX_OSS_EQUALIZER: + hw->bass_level = p1; + hw->treble_level = p2; + snd_emu8000_update_equalizer(hw); + break; + } + return 0; +} +#endif + + +/* + * additional patch keys + */ + +#define SNDRV_EMU8000_LOAD_CHORUS_FX 0x10 /* optarg=mode */ +#define SNDRV_EMU8000_LOAD_REVERB_FX 0x11 /* optarg=mode */ + + +/* + * callback routine + */ + +static int +load_fx(struct snd_emux *emu, int type, int mode, const void __user *buf, long len) +{ + struct snd_emu8000 *hw; + hw = emu->hw; + + /* skip header */ + buf += 16; + len -= 16; + + switch (type) { + case SNDRV_EMU8000_LOAD_CHORUS_FX: + return snd_emu8000_load_chorus_fx(hw, mode, buf, len); + case SNDRV_EMU8000_LOAD_REVERB_FX: + return snd_emu8000_load_reverb_fx(hw, mode, buf, len); + } + return -EINVAL; +} + |