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Diffstat (limited to 'sound/oss/emu10k1/efxmgr.c')
-rw-r--r--sound/oss/emu10k1/efxmgr.c220
1 files changed, 220 insertions, 0 deletions
diff --git a/sound/oss/emu10k1/efxmgr.c b/sound/oss/emu10k1/efxmgr.c
new file mode 100644
index 00000000000..7d5865de4c2
--- /dev/null
+++ b/sound/oss/emu10k1/efxmgr.c
@@ -0,0 +1,220 @@
+/*
+ **********************************************************************
+ * 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];
+ unsigned long *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;
+
+ //fixme: once patch manager is up, remember to fix this for the audigy
+ if (card->is_audigy) {
+ sblive_writeptr(card, A_GPR_BASE + addr, 0, val);
+ } else {
+ 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.
+static 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->is_aps)
+ 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;
+
+ 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;
+
+ 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;
+
+ vol = (100 - vol ) * scale / 100;
+
+ // Thanks to the comp.dsp newsgroup for this neat trick:
+ vol = (vol >= scale) ? 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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