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/*
**********************************************************************
* efxmgr.c
* Copyright 1999, 2000 Creative Labs, Inc.
*
**********************************************************************
*
* Date Author Summary of changes
* ---- ------ ------------------
* October 20, 1999 Bertrand Lee base code release
*
**********************************************************************
*
* 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., 675 Mass Ave, Cambridge, MA 02139,
* USA.
*
**********************************************************************
*/
#include <linux/bitops.h>
#include "hwaccess.h"
#include "efxmgr.h"
int emu10k1_find_control_gpr(struct patch_manager *mgr, const char *patch_name, const char *gpr_name)
{
struct dsp_patch *patch;
struct dsp_rpatch *rpatch;
char s[PATCH_NAME_SIZE + 4];
u32 *gpr_used;
int i;
DPD(2, "emu10k1_find_control_gpr(): %s %s\n", patch_name, gpr_name);
rpatch = &mgr->rpatch;
if (!strcmp(rpatch->name, patch_name)) {
gpr_used = rpatch->gpr_used;
goto match;
}
for (i = 0; i < mgr->current_pages * PATCHES_PER_PAGE; i++) {
patch = PATCH(mgr, i);
sprintf(s,"%s", patch->name);
if (!strcmp(s, patch_name)) {
gpr_used = patch->gpr_used;
goto match;
}
}
return -1;
match:
for (i = 0; i < NUM_GPRS; i++)
if (mgr->gpr[i].type == GPR_TYPE_CONTROL &&
test_bit(i, gpr_used) &&
!strcmp(mgr->gpr[i].name, gpr_name))
return i;
return -1;
}
void emu10k1_set_control_gpr(struct emu10k1_card *card, int addr, s32 val, int flag)
{
struct patch_manager *mgr = &card->mgr;
DPD(2, "emu10k1_set_control_gpr(): %d %x\n", addr, val);
if (addr < 0 || addr >= NUM_GPRS)
return;
if (flag)
val += sblive_readptr(card, GPR_BASE + addr, 0);
if (val > mgr->gpr[addr].max)
val = mgr->gpr[addr].max;
else if (val < mgr->gpr[addr].min)
val = mgr->gpr[addr].min;
sblive_writeptr(card, GPR_BASE + addr, 0, val);
}
//TODO: make this configurable:
#define VOLCTRL_CHANNEL SOUND_MIXER_VOLUME
#define VOLCTRL_STEP_SIZE 5
//An internal function for setting OSS mixer controls.
void emu10k1_set_oss_vol(struct emu10k1_card *card, int oss_mixer,
unsigned int left, unsigned int right)
{
extern char volume_params[SOUND_MIXER_NRDEVICES];
card->ac97.mixer_state[oss_mixer] = (right << 8) | left;
if (!card->isaps)
card->ac97.write_mixer(&card->ac97, oss_mixer, left, right);
emu10k1_set_volume_gpr(card, card->mgr.ctrl_gpr[oss_mixer][0], left,
volume_params[oss_mixer]);
emu10k1_set_volume_gpr(card, card->mgr.ctrl_gpr[oss_mixer][1], right,
volume_params[oss_mixer]);
}
//FIXME: mute should unmute when pressed a second time
void emu10k1_mute_irqhandler(struct emu10k1_card *card)
{
int oss_channel = VOLCTRL_CHANNEL;
int left, right;
static int val = 0;
if (val) {
left = val & 0xff;
right = (val >> 8) & 0xff;
val = 0;
} else {
val = card->ac97.mixer_state[oss_channel];
left = 0;
right = 0;
}
emu10k1_set_oss_vol(card, oss_channel, left, right);
}
void emu10k1_volincr_irqhandler(struct emu10k1_card *card)
{
int oss_channel = VOLCTRL_CHANNEL;
int left, right;
left = card->ac97.mixer_state[oss_channel] & 0xff;
right = (card->ac97.mixer_state[oss_channel] >> 8) & 0xff;
if ((left += VOLCTRL_STEP_SIZE) > 100)
left = 100;
if ((right += VOLCTRL_STEP_SIZE) > 100)
right = 100;
emu10k1_set_oss_vol(card, oss_channel, left, right);
}
void emu10k1_voldecr_irqhandler(struct emu10k1_card *card)
{
int oss_channel = VOLCTRL_CHANNEL;
int left, right;
left = card->ac97.mixer_state[oss_channel] & 0xff;
right = (card->ac97.mixer_state[oss_channel] >> 8) & 0xff;
if ((left -= VOLCTRL_STEP_SIZE) < 0)
left = 0;
if ((right -= VOLCTRL_STEP_SIZE) < 0)
right = 0;
emu10k1_set_oss_vol(card, oss_channel, left, right);
}
void emu10k1_set_volume_gpr(struct emu10k1_card *card, int addr, s32 vol, int scale)
{
struct patch_manager *mgr = &card->mgr;
unsigned long flags;
int muting;
static const s32 log2lin[4] ={ // attenuation (dB)
0x7fffffff, // 0.0
0x7fffffff * 0.840896415253715 , // 1.5
0x7fffffff * 0.707106781186548, // 3.0
0x7fffffff * 0.594603557501361 , // 4.5
};
if (addr < 0)
return;
muting = (scale == 0x10) ? 0x7f: scale;
vol = (100 - vol ) * scale / 100;
// Thanks to the comp.dsp newsgroup for this neat trick:
vol = (vol >= muting) ? 0 : (log2lin[vol & 3] >> (vol >> 2));
spin_lock_irqsave(&mgr->lock, flags);
emu10k1_set_control_gpr(card, addr, vol, 0);
spin_unlock_irqrestore(&mgr->lock, flags);
}
void emu10k1_dsp_irqhandler(struct emu10k1_card *card)
{
unsigned long flags;
if (card->pt.state != PT_STATE_INACTIVE) {
u32 bc;
bc = sblive_readptr(card, GPR_BASE + card->pt.intr_gpr, 0);
if (bc != 0) {
DPD(3, "pt interrupt, bc = %d\n", bc);
spin_lock_irqsave(&card->pt.lock, flags);
card->pt.blocks_played = bc;
if (card->pt.blocks_played >= card->pt.blocks_copied) {
DPF(1, "buffer underrun in passthrough playback\n");
emu10k1_pt_stop(card);
}
wake_up_interruptible(&card->pt.wait);
spin_unlock_irqrestore(&card->pt.lock, flags);
}
}
}
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