sound/oss/emu10k1/efxmgr.c

   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