drivers/sound/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         if (flag)
  84                 val += sblive_readptr(card, GPR_BASE + addr, 0);
  85
  86         if (val > mgr->gpr[addr].max)
  87                 val = mgr->gpr[addr].max;
  88         else if (val < mgr->gpr[addr].min)
  89                 val = mgr->gpr[addr].min;
  90
  91         sblive_writeptr(card, GPR_BASE + addr, 0, val);
  92 }
  93
  94 //TODO: make this configurable:
  95 #define VOLCTRL_CHANNEL SOUND_MIXER_VOLUME
  96 #define VOLCTRL_STEP_SIZE        5
  97
  98 //An internal function for setting OSS mixer controls.
  99 void emu10k1_set_oss_vol(struct emu10k1_card *card, int oss_mixer,
 100                          unsigned int left, unsigned int right)
 101 {
 102         extern char volume_params[SOUND_MIXER_NRDEVICES];
 103
 104         card->ac97.mixer_state[oss_mixer] = (right << 8) | left;
 105
 106         if (!card->is_aps)
 107                 card->ac97.write_mixer(&card->ac97, oss_mixer, left, right);
 108
 109         emu10k1_set_volume_gpr(card, card->mgr.ctrl_gpr[oss_mixer][0], left,
 110                                volume_params[oss_mixer]);
 111
 112         emu10k1_set_volume_gpr(card, card->mgr.ctrl_gpr[oss_mixer][1], right,
 113                                volume_params[oss_mixer]);
 114 }
 115
 116 //FIXME: mute should unmute when pressed a second time
 117 void emu10k1_mute_irqhandler(struct emu10k1_card *card)
 118 {
 119         int oss_channel = VOLCTRL_CHANNEL;
 120         int left, right;
 121         static int val = 0;
 122
 123         if (val) {
 124                 left = val & 0xff;
 125                 right = (val >> 8) & 0xff;
 126                 val = 0;
 127         } else {
 128                 val = card->ac97.mixer_state[oss_channel];
 129                 left = 0;
 130                 right = 0;
 131         }
 132
 133         emu10k1_set_oss_vol(card, oss_channel, left, right);
 134 }
 135
 136 void emu10k1_volincr_irqhandler(struct emu10k1_card *card)
 137 {
 138         int oss_channel = VOLCTRL_CHANNEL;
 139         int left, right;
 140
 141         left = card->ac97.mixer_state[oss_channel] & 0xff;
 142         right = (card->ac97.mixer_state[oss_channel] >> 8) & 0xff;
 143
 144         if ((left += VOLCTRL_STEP_SIZE) > 100)
 145                 left = 100;
 146
 147         if ((right += VOLCTRL_STEP_SIZE) > 100)
 148                 right = 100;
 149
 150         emu10k1_set_oss_vol(card, oss_channel, left, right);
 151 }
 152
 153 void emu10k1_voldecr_irqhandler(struct emu10k1_card *card)
 154 {
 155         int oss_channel = VOLCTRL_CHANNEL;
 156         int left, right;
 157
 158         left = card->ac97.mixer_state[oss_channel] & 0xff;
 159         right = (card->ac97.mixer_state[oss_channel] >> 8) & 0xff;
 160
 161         if ((left -= VOLCTRL_STEP_SIZE) < 0)
 162                 left = 0;
 163
 164         if ((right -= VOLCTRL_STEP_SIZE) < 0)
 165                 right = 0;
 166
 167         emu10k1_set_oss_vol(card, oss_channel, left, right);
 168 }
 169
 170 void emu10k1_set_volume_gpr(struct emu10k1_card *card, int addr, s32 vol, int scale)
 171 {
 172         struct patch_manager *mgr = &card->mgr;
 173         unsigned long flags;
 174
 175         static const s32 log2lin[4] ={           //  attenuation (dB)
 176                 0x7fffffff,                      //       0.0
 177                 0x7fffffff * 0.840896415253715 , //       1.5
 178                 0x7fffffff * 0.707106781186548,  //       3.0
 179                 0x7fffffff * 0.594603557501361 , //       4.5
 180         };
 181
 182         if (addr < 0)
 183                 return;
 184
 185         vol = (100 - vol ) * scale / 100;
 186
 187         // Thanks to the comp.dsp newsgroup for this neat trick:
 188         vol = (vol >= scale) ? 0 : (log2lin[vol & 3] >> (vol >> 2));
 189
 190         spin_lock_irqsave(&mgr->lock, flags);
 191         emu10k1_set_control_gpr(card, addr, vol, 0);
 192         spin_unlock_irqrestore(&mgr->lock, flags);
 193 }
 194
 195 void emu10k1_dsp_irqhandler(struct emu10k1_card *card)
 196 {
 197         unsigned long flags;
 198
 199         if (card->pt.state != PT_STATE_INACTIVE) {
 200                 u32 bc;
 201                 bc = sblive_readptr(card, GPR_BASE + card->pt.intr_gpr, 0);
 202                 if (bc != 0) {
 203                         DPD(3, "pt interrupt, bc = %d\n", bc);
 204                         spin_lock_irqsave(&card->pt.lock, flags);
 205                         card->pt.blocks_played = bc;
 206                         if (card->pt.blocks_played >= card->pt.blocks_copied) {
 207                                 DPF(1, "buffer underrun in passthrough playback\n");
 208                                 emu10k1_pt_stop(card);
 209                         }
 210                         wake_up_interruptible(&card->pt.wait);
 211                         spin_unlock_irqrestore(&card->pt.lock, flags);
 212                 }
 213         }
 214 }
 215