1 /*
2 **********************************************************************
3 * efxmgr.c
4 * Copyright 1999, 2000 Creative Labs, Inc.
5 *
6 **********************************************************************
7 *
8 * Date Author Summary of changes
9 * ---- ------ ------------------
10 * October 20, 1999 Bertrand Lee base code release
11 *
12 **********************************************************************
13 *
14 * This program is free software; you can redistribute it and/or
15 * modify it under the terms of the GNU General Public License as
16 * published by the Free Software Foundation; either version 2 of
17 * the License, or (at your option) any later version.
18 *
19 * This program is distributed in the hope that it will be useful,
20 * but WITHOUT ANY WARRANTY; without even the implied warranty of
21 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * GNU General Public License for more details.
23 *
24 * You should have received a copy of the GNU General Public
25 * License along with this program; if not, write to the Free
26 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
27 * USA.
28 *
29 **********************************************************************
30 */
31
32 #include <linux/bitops.h>
33 #include "hwaccess.h"
34 #include "efxmgr.h"
35
36 int emu10k1_find_control_gpr(struct patch_manager *mgr, const char *patch_name, const char *gpr_name)
37 {
38 struct dsp_patch *patch;
39 struct dsp_rpatch *rpatch;
40 char s[PATCH_NAME_SIZE + 4];
41 unsigned long *gpr_used;
42 int i;
43
44 DPD(2, "emu10k1_find_control_gpr(): %s %s\n", patch_name, gpr_name);
45
46 rpatch = &mgr->rpatch;
47 if (!strcmp(rpatch->name, patch_name)) {
48 gpr_used = rpatch->gpr_used;
49 goto match;
50 }
51
52 for (i = 0; i < mgr->current_pages * PATCHES_PER_PAGE; i++) {
53 patch = PATCH(mgr, i);
54 sprintf(s,"%s", patch->name);
55
56 if (!strcmp(s, patch_name)) {
57 gpr_used = patch->gpr_used;
58 goto match;
59 }
60 }
61
62 return -1;
63
64 match:
65 for (i = 0; i < NUM_GPRS; i++)
66 if (mgr->gpr[i].type == GPR_TYPE_CONTROL &&
67 test_bit(i, gpr_used) &&
68 !strcmp(mgr->gpr[i].name, gpr_name))
69 return i;
70
71 return -1;
72 }
73
74 void emu10k1_set_control_gpr(struct emu10k1_card *card, int addr, s32 val, int flag)
75 {
76 struct patch_manager *mgr = &card->mgr;
77
78 DPD(2, "emu10k1_set_control_gpr(): %d %x\n", addr, val);
79
80 if (addr < 0 || addr >= NUM_GPRS)
81 return;
82
83 //fixme: once patch manager is up, remember to fix this for the audigy
84 if (card->is_audigy) {
85 sblive_writeptr(card, A_GPR_BASE + addr, 0, val);
86 } else {
87 if (flag)
88 val += sblive_readptr(card, GPR_BASE + addr, 0);
89 if (val > mgr->gpr[addr].max)
90 val = mgr->gpr[addr].max;
91 else if (val < mgr->gpr[addr].min)
92 val = mgr->gpr[addr].min;
93 sblive_writeptr(card, GPR_BASE + addr, 0, val);
94 }
95
96
97 }
98
99 //TODO: make this configurable:
100 #define VOLCTRL_CHANNEL SOUND_MIXER_VOLUME
101 #define VOLCTRL_STEP_SIZE 5
102
103 //An internal function for setting OSS mixer controls.
104 static void emu10k1_set_oss_vol(struct emu10k1_card *card, int oss_mixer,
105 unsigned int left, unsigned int right)
106 {
107 extern char volume_params[SOUND_MIXER_NRDEVICES];
108
109 card->ac97->mixer_state[oss_mixer] = (right << 8) | left;
110
111 if (!card->is_aps)
112 card->ac97->write_mixer(card->ac97, oss_mixer, left, right);
113
114 emu10k1_set_volume_gpr(card, card->mgr.ctrl_gpr[oss_mixer][0], left,
115 volume_params[oss_mixer]);
116
117 emu10k1_set_volume_gpr(card, card->mgr.ctrl_gpr[oss_mixer][1], right,
118 volume_params[oss_mixer]);
119 }
120
121 //FIXME: mute should unmute when pressed a second time
122 void emu10k1_mute_irqhandler(struct emu10k1_card *card)
123 {
124 int oss_channel = VOLCTRL_CHANNEL;
125 int left, right;
126 static int val;
127
128 if (val) {
129 left = val & 0xff;
130 right = (val >> 8) & 0xff;
131 val = 0;
132 } else {
133 val = card->ac97->mixer_state[oss_channel];
134 left = 0;
135 right = 0;
136 }
137
138 emu10k1_set_oss_vol(card, oss_channel, left, right);
139 }
140
141 void emu10k1_volincr_irqhandler(struct emu10k1_card *card)
142 {
143 int oss_channel = VOLCTRL_CHANNEL;
144 int left, right;
145
146 left = card->ac97->mixer_state[oss_channel] & 0xff;
147 right = (card->ac97->mixer_state[oss_channel] >> 8) & 0xff;
148
149 if ((left += VOLCTRL_STEP_SIZE) > 100)
150 left = 100;
151
152 if ((right += VOLCTRL_STEP_SIZE) > 100)
153 right = 100;
154
155 emu10k1_set_oss_vol(card, oss_channel, left, right);
156 }
157
158 void emu10k1_voldecr_irqhandler(struct emu10k1_card *card)
159 {
160 int oss_channel = VOLCTRL_CHANNEL;
161 int left, right;
162
163 left = card->ac97->mixer_state[oss_channel] & 0xff;
164 right = (card->ac97->mixer_state[oss_channel] >> 8) & 0xff;
165
166 if ((left -= VOLCTRL_STEP_SIZE) < 0)
167 left = 0;
168
169 if ((right -= VOLCTRL_STEP_SIZE) < 0)
170 right = 0;
171
172 emu10k1_set_oss_vol(card, oss_channel, left, right);
173 }
174
175 void emu10k1_set_volume_gpr(struct emu10k1_card *card, int addr, s32 vol, int scale)
176 {
177 struct patch_manager *mgr = &card->mgr;
178 unsigned long flags;
179
180 static const s32 log2lin[4] ={ // attenuation (dB)
181 0x7fffffff, // 0.0
182 0x7fffffff * 0.840896415253715 , // 1.5
183 0x7fffffff * 0.707106781186548, // 3.0
184 0x7fffffff * 0.594603557501361 , // 4.5
185 };
186
187 if (addr < 0)
188 return;
189
190 vol = (100 - vol ) * scale / 100;
191
192 // Thanks to the comp.dsp newsgroup for this neat trick:
193 vol = (vol >= scale) ? 0 : (log2lin[vol & 3] >> (vol >> 2));
194
195 spin_lock_irqsave(&mgr->lock, flags);
196 emu10k1_set_control_gpr(card, addr, vol, 0);
197 spin_unlock_irqrestore(&mgr->lock, flags);
198 }
199
200 void emu10k1_dsp_irqhandler(struct emu10k1_card *card)
201 {
202 unsigned long flags;
203
204 if (card->pt.state != PT_STATE_INACTIVE) {
205 u32 bc;
206 bc = sblive_readptr(card, GPR_BASE + card->pt.intr_gpr, 0);
207 if (bc != 0) {
208 DPD(3, "pt interrupt, bc = %d\n", bc);
209 spin_lock_irqsave(&card->pt.lock, flags);
210 card->pt.blocks_played = bc;
211 if (card->pt.blocks_played >= card->pt.blocks_copied) {
212 DPF(1, "buffer underrun in passthrough playback\n");
213 emu10k1_pt_stop(card);
214 }
215 wake_up_interruptible(&card->pt.wait);
216 spin_unlock_irqrestore(&card->pt.lock, flags);
217 }
218 }
219 }
220
221
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