release/src-rt-6.x/linux/linux-2.6/sound/pci/emu10k1/emu10k1_patch.c

   1 /*
   2  *  Patch transfer callback for Emu10k1
   3  *
   4  *  Copyright (C) 2000 Takashi iwai <tiwai@suse.de>
   5  *
   6  *   This program is free software; you can redistribute it and/or modify
   7  *   it under the terms of the GNU General Public License as published by
   8  *   the Free Software Foundation; either version 2 of the License, or
   9  *   (at your option) any later version.
  10  *
  11  *   This program is distributed in the hope that it will be useful,
  12  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *   GNU General Public License for more details.
  15  *
  16  *   You should have received a copy of the GNU General Public License
  17  *   along with this program; if not, write to the Free Software
  18  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19  */
  20 /*
  21  * All the code for loading in a patch.  There is very little that is
  22  * chip specific here.  Just the actual writing to the board.
  23  */
  24
  25 #include "emu10k1_synth_local.h"
  26
  27 /*
  28  */
  29 #define BLANK_LOOP_START        4
  30 #define BLANK_LOOP_END          8
  31 #define BLANK_LOOP_SIZE         12
  32 #define BLANK_HEAD_SIZE         32
  33
  34 /*
  35  * allocate a sample block and copy data from userspace
  36  */
  37 int
  38 snd_emu10k1_sample_new(struct snd_emux *rec, struct snd_sf_sample *sp,
  39                        struct snd_util_memhdr *hdr,
  40                        const void __user *data, long count)
  41 {
  42         int offset;
  43         int truesize, size, loopsize, blocksize;
  44         int loopend, sampleend;
  45         unsigned int start_addr;
  46         struct snd_emu10k1 *emu;
  47
  48         emu = rec->hw;
  49         snd_assert(sp != NULL, return -EINVAL);
  50         snd_assert(hdr != NULL, return -EINVAL);
  51
  52         if (sp->v.size == 0) {
  53                 snd_printd("emu: rom font for sample %d\n", sp->v.sample);
  54                 return 0;
  55         }
  56
  57         /* recalculate address offset */
  58         sp->v.end -= sp->v.start;
  59         sp->v.loopstart -= sp->v.start;
  60         sp->v.loopend -= sp->v.start;
  61         sp->v.start = 0;
  62
  63         /* some samples have invalid data.  the addresses are corrected in voice info */
  64         sampleend = sp->v.end;
  65         if (sampleend > sp->v.size)
  66                 sampleend = sp->v.size;
  67         loopend = sp->v.loopend;
  68         if (loopend > sampleend)
  69                 loopend = sampleend;
  70
  71         /* be sure loop points start < end */
  72         if (sp->v.loopstart >= sp->v.loopend) {
  73                 int tmp = sp->v.loopstart;
  74                 sp->v.loopstart = sp->v.loopend;
  75                 sp->v.loopend = tmp;
  76         }
  77
  78         /* compute true data size to be loaded */
  79         truesize = sp->v.size + BLANK_HEAD_SIZE;
  80         loopsize = 0;
  81 #if 0 /* not supported */
  82         if (sp->v.mode_flags & (SNDRV_SFNT_SAMPLE_BIDIR_LOOP|SNDRV_SFNT_SAMPLE_REVERSE_LOOP))
  83                 loopsize = sp->v.loopend - sp->v.loopstart;
  84         truesize += loopsize;
  85 #endif
  86         if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_NO_BLANK)
  87                 truesize += BLANK_LOOP_SIZE;
  88
  89         /* try to allocate a memory block */
  90         blocksize = truesize;
  91         if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS))
  92                 blocksize *= 2;
  93         sp->block = snd_emu10k1_synth_alloc(emu, blocksize);
  94         if (sp->block == NULL) {
  95                 snd_printd("emu10k1: synth malloc failed (size=%d)\n", blocksize);
  96                 /* not ENOMEM (for compatibility with OSS) */
  97                 return -ENOSPC;
  98         }
  99         /* set the total size */
 100         sp->v.truesize = blocksize;
 101
 102         /* write blank samples at head */
 103         offset = 0;
 104         size = BLANK_HEAD_SIZE;
 105         if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS))
 106                 size *= 2;
 107         snd_assert(offset + size <= blocksize, return -EINVAL);
 108         snd_emu10k1_synth_bzero(emu, sp->block, offset, size);
 109         offset += size;
 110
 111         /* copy start->loopend */
 112         size = loopend;
 113         if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS))
 114                 size *= 2;
 115         snd_assert(offset + size <= blocksize, return -EINVAL);
 116         if (snd_emu10k1_synth_copy_from_user(emu, sp->block, offset, data, size)) {
 117                 snd_emu10k1_synth_free(emu, sp->block);
 118                 sp->block = NULL;
 119                 return -EFAULT;
 120         }
 121         offset += size;
 122         data += size;
 123
 124 #if 0 /* not suppported yet */
 125         /* handle reverse (or bidirectional) loop */
 126         if (sp->v.mode_flags & (SNDRV_SFNT_SAMPLE_BIDIR_LOOP|SNDRV_SFNT_SAMPLE_REVERSE_LOOP)) {
 127                 /* copy loop in reverse */
 128                 if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS)) {
 129                         int woffset;
 130                         unsigned short *wblock = (unsigned short*)block;
 131                         woffset = offset / 2;
 132                         snd_assert(offset + loopsize*2 <= blocksize, return -EINVAL);
 133                         for (i = 0; i < loopsize; i++)
 134                                 wblock[woffset + i] = wblock[woffset - i -1];
 135                         offset += loopsize * 2;
 136                 } else {
 137                         snd_assert(offset + loopsize <= blocksize, return -EINVAL);
 138                         for (i = 0; i < loopsize; i++)
 139                                 block[offset + i] = block[offset - i -1];
 140                         offset += loopsize;
 141                 }
 142
 143                 /* modify loop pointers */
 144                 if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_BIDIR_LOOP) {
 145                         sp->v.loopend += loopsize;
 146                 } else {
 147                         sp->v.loopstart += loopsize;
 148                         sp->v.loopend += loopsize;
 149                 }
 150                 /* add sample pointer */
 151                 sp->v.end += loopsize;
 152         }
 153 #endif
 154
 155         /* loopend -> sample end */
 156         size = sp->v.size - loopend;
 157         snd_assert(size >= 0, return -EINVAL);
 158         if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS))
 159                 size *= 2;
 160         if (snd_emu10k1_synth_copy_from_user(emu, sp->block, offset, data, size)) {
 161                 snd_emu10k1_synth_free(emu, sp->block);
 162                 sp->block = NULL;
 163                 return -EFAULT;
 164         }
 165         offset += size;
 166
 167         /* clear rest of samples (if any) */
 168         if (offset < blocksize)
 169                 snd_emu10k1_synth_bzero(emu, sp->block, offset, blocksize - offset);
 170
 171         if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_NO_BLANK) {
 172                 /* if no blank loop is attached in the sample, add it */
 173                 if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_SINGLESHOT) {
 174                         sp->v.loopstart = sp->v.end + BLANK_LOOP_START;
 175                         sp->v.loopend = sp->v.end + BLANK_LOOP_END;
 176                 }
 177         }
 178
 179 #if 0 /* not supported yet */
 180         if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_UNSIGNED) {
 181                 /* unsigned -> signed */
 182                 if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS)) {
 183                         unsigned short *wblock = (unsigned short*)block;
 184                         for (i = 0; i < truesize; i++)
 185                                 wblock[i] ^= 0x8000;
 186                 } else {
 187                         for (i = 0; i < truesize; i++)
 188                                 block[i] ^= 0x80;
 189                 }
 190         }
 191 #endif
 192
 193         /* recalculate offset */
 194         start_addr = BLANK_HEAD_SIZE * 2;
 195         if (! (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS))
 196                 start_addr >>= 1;
 197         sp->v.start += start_addr;
 198         sp->v.end += start_addr;
 199         sp->v.loopstart += start_addr;
 200         sp->v.loopend += start_addr;
 201
 202         return 0;
 203 }
 204
 205 /*
 206  * free a sample block
 207  */
 208 int
 209 snd_emu10k1_sample_free(struct snd_emux *rec, struct snd_sf_sample *sp,
 210                         struct snd_util_memhdr *hdr)
 211 {
 212         struct snd_emu10k1 *emu;
 213
 214         emu = rec->hw;
 215         snd_assert(sp != NULL, return -EINVAL);
 216         snd_assert(hdr != NULL, return -EINVAL);
 217
 218         if (sp->block) {
 219                 snd_emu10k1_synth_free(emu, sp->block);
 220                 sp->block = NULL;
 221         }
 222         return 0;
 223 }
 224