sound/isa/sb/emu8000_patch.c

   1 /*
   2  *  Patch routines for the emu8000 (AWE32/64)
   3  *
   4  *  Copyright (C) 1999 Steve Ratcliffe
   5  *  Copyright (C) 1999-2000 Takashi Iwai <tiwai@suse.de>
   6  *
   7  *   This program is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU General Public License as published by
   9  *   the Free Software Foundation; either version 2 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This program is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *   GNU General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU General Public License
  18  *   along with this program; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  20  */
  21
  22 #include "emu8000_local.h"
  23 #include <asm/uaccess.h>
  24 #include <linux/moduleparam.h>
  25 #include <linux/moduleparam.h>
  26
  27 static int emu8000_reset_addr;
  28 module_param(emu8000_reset_addr, int, 0444);
  29 MODULE_PARM_DESC(emu8000_reset_addr, "reset write address at each time (makes slowdown)");
  30
  31
  32 /*
  33  * Open up channels.
  34  */
  35 static int
  36 snd_emu8000_open_dma(struct snd_emu8000 *emu, int write)
  37 {
  38         int i;
  39
  40         /* reserve all 30 voices for loading */
  41         for (i = 0; i < EMU8000_DRAM_VOICES; i++) {
  42                 snd_emux_lock_voice(emu->emu, i);
  43                 snd_emu8000_dma_chan(emu, i, write);
  44         }
  45
  46         /* assign voice 31 and 32 to ROM */
  47         EMU8000_VTFT_WRITE(emu, 30, 0);
  48         EMU8000_PSST_WRITE(emu, 30, 0x1d8);
  49         EMU8000_CSL_WRITE(emu, 30, 0x1e0);
  50         EMU8000_CCCA_WRITE(emu, 30, 0x1d8);
  51         EMU8000_VTFT_WRITE(emu, 31, 0);
  52         EMU8000_PSST_WRITE(emu, 31, 0x1d8);
  53         EMU8000_CSL_WRITE(emu, 31, 0x1e0);
  54         EMU8000_CCCA_WRITE(emu, 31, 0x1d8);
  55
  56         return 0;
  57 }
  58
  59 /*
  60  * Close all dram channels.
  61  */
  62 static void
  63 snd_emu8000_close_dma(struct snd_emu8000 *emu)
  64 {
  65         int i;
  66
  67         for (i = 0; i < EMU8000_DRAM_VOICES; i++) {
  68                 snd_emu8000_dma_chan(emu, i, EMU8000_RAM_CLOSE);
  69                 snd_emux_unlock_voice(emu->emu, i);
  70         }
  71 }
  72
  73 /*
  74  */
  75
  76 #define BLANK_LOOP_START        4
  77 #define BLANK_LOOP_END          8
  78 #define BLANK_LOOP_SIZE         12
  79 #define BLANK_HEAD_SIZE         48
  80
  81 /*
  82  * Read a word from userland, taking care of conversions from
  83  * 8bit samples etc.
  84  */
  85 static unsigned short
  86 read_word(const void __user *buf, int offset, int mode)
  87 {
  88         unsigned short c;
  89         if (mode & SNDRV_SFNT_SAMPLE_8BITS) {
  90                 unsigned char cc;
  91                 get_user(cc, (unsigned char __user *)buf + offset);
  92                 c = cc << 8; /* convert 8bit -> 16bit */
  93         } else {
  94 #ifdef SNDRV_LITTLE_ENDIAN
  95                 get_user(c, (unsigned short __user *)buf + offset);
  96 #else
  97                 unsigned short cc;
  98                 get_user(cc, (unsigned short __user *)buf + offset);
  99                 c = swab16(cc);
 100 #endif
 101         }
 102         if (mode & SNDRV_SFNT_SAMPLE_UNSIGNED)
 103                 c ^= 0x8000; /* unsigned -> signed */
 104         return c;
 105 }
 106
 107 /*
 108  */
 109 static void
 110 snd_emu8000_write_wait(struct snd_emu8000 *emu)
 111 {
 112         while ((EMU8000_SMALW_READ(emu) & 0x80000000) != 0) {
 113                 schedule_timeout_interruptible(1);
 114                 if (signal_pending(current))
 115                         break;
 116         }
 117 }
 118
 119 /*
 120  * write sample word data
 121  *
 122  * You should not have to keep resetting the address each time
 123  * as the chip is supposed to step on the next address automatically.
 124  * It mostly does, but during writes of some samples at random it
 125  * completely loses words (every one in 16 roughly but with no
 126  * obvious pattern).
 127  *
 128  * This is therefore much slower than need be, but is at least
 129  * working.
 130  */
 131 static inline void
 132 write_word(struct snd_emu8000 *emu, int *offset, unsigned short data)
 133 {
 134         if (emu8000_reset_addr) {
 135                 if (emu8000_reset_addr > 1)
 136                         snd_emu8000_write_wait(emu);
 137                 EMU8000_SMALW_WRITE(emu, *offset);
 138         }
 139         EMU8000_SMLD_WRITE(emu, data);
 140         *offset += 1;
 141 }
 142
 143 /*
 144  * Write the sample to EMU800 memory.  This routine is invoked out of
 145  * the generic soundfont routines as a callback.
 146  */
 147 int
 148 snd_emu8000_sample_new(struct snd_emux *rec, struct snd_sf_sample *sp,
 149                        struct snd_util_memhdr *hdr,
 150                        const void __user *data, long count)
 151 {
 152         int  i;
 153         int  rc;
 154         int  offset;
 155         int  truesize;
 156         int  dram_offset, dram_start;
 157         struct snd_emu8000 *emu;
 158
 159         emu = rec->hw;
 160         if (snd_BUG_ON(!sp))
 161                 return -EINVAL;
 162
 163         if (sp->v.size == 0)
 164                 return 0;
 165
 166         /* be sure loop points start < end */
 167         if (sp->v.loopstart > sp->v.loopend) {
 168                 int tmp = sp->v.loopstart;
 169                 sp->v.loopstart = sp->v.loopend;
 170                 sp->v.loopend = tmp;
 171         }
 172
 173         /* compute true data size to be loaded */
 174         truesize = sp->v.size;
 175         if (sp->v.mode_flags & (SNDRV_SFNT_SAMPLE_BIDIR_LOOP|SNDRV_SFNT_SAMPLE_REVERSE_LOOP))
 176                 truesize += sp->v.loopend - sp->v.loopstart;
 177         if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_NO_BLANK)
 178                 truesize += BLANK_LOOP_SIZE;
 179
 180         sp->block = snd_util_mem_alloc(hdr, truesize * 2);
 181         if (sp->block == NULL) {
 182                 /*snd_printd("EMU8000: out of memory\n");*/
 183                 /* not ENOMEM (for compatibility) */
 184                 return -ENOSPC;
 185         }
 186
 187         if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS) {
 188                 if (!access_ok(VERIFY_READ, data, sp->v.size))
 189                         return -EFAULT;
 190         } else {
 191                 if (!access_ok(VERIFY_READ, data, sp->v.size * 2))
 192                         return -EFAULT;
 193         }
 194
 195         /* recalculate address offset */
 196         sp->v.end -= sp->v.start;
 197         sp->v.loopstart -= sp->v.start;
 198         sp->v.loopend -= sp->v.start;
 199         sp->v.start = 0;
 200
 201         /* dram position (in word) -- mem_offset is byte */
 202         dram_offset = EMU8000_DRAM_OFFSET + (sp->block->offset >> 1);
 203         dram_start = dram_offset;
 204
 205         /* set the total size (store onto obsolete checksum value) */
 206         sp->v.truesize = truesize * 2; /* in bytes */
 207
 208         snd_emux_terminate_all(emu->emu);
 209         if ((rc = snd_emu8000_open_dma(emu, EMU8000_RAM_WRITE)) != 0)
 210                 return rc;
 211
 212         /* Set the address to start writing at */
 213         snd_emu8000_write_wait(emu);
 214         EMU8000_SMALW_WRITE(emu, dram_offset);
 215
 216         /*snd_emu8000_init_fm(emu);*/
 217
 218 #if 0
 219         /* first block - write 48 samples for silence */
 220         if (! sp->block->offset) {
 221                 for (i = 0; i < BLANK_HEAD_SIZE; i++) {
 222                         write_word(emu, &dram_offset, 0);
 223                 }
 224         }
 225 #endif
 226
 227         offset = 0;
 228         for (i = 0; i < sp->v.size; i++) {
 229                 unsigned short s;
 230
 231                 s = read_word(data, offset, sp->v.mode_flags);
 232                 offset++;
 233                 write_word(emu, &dram_offset, s);
 234
 235                 /* we may take too long time in this loop.
 236                  * so give controls back to kernel if needed.
 237                  */
 238                 cond_resched();
 239
 240                 if (i == sp->v.loopend &&
 241                     (sp->v.mode_flags & (SNDRV_SFNT_SAMPLE_BIDIR_LOOP|SNDRV_SFNT_SAMPLE_REVERSE_LOOP)))
 242                 {
 243                         int looplen = sp->v.loopend - sp->v.loopstart;
 244                         int k;
 245
 246                         /* copy reverse loop */
 247                         for (k = 1; k <= looplen; k++) {
 248                                 s = read_word(data, offset - k, sp->v.mode_flags);
 249                                 write_word(emu, &dram_offset, s);
 250                         }
 251                         if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_BIDIR_LOOP) {
 252                                 sp->v.loopend += looplen;
 253                         } else {
 254                                 sp->v.loopstart += looplen;
 255                                 sp->v.loopend += looplen;
 256                         }
 257                         sp->v.end += looplen;
 258                 }
 259         }
 260
 261         /* if no blank loop is attached in the sample, add it */
 262         if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_NO_BLANK) {
 263                 for (i = 0; i < BLANK_LOOP_SIZE; i++) {
 264                         write_word(emu, &dram_offset, 0);
 265                 }
 266                 if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_SINGLESHOT) {
 267                         sp->v.loopstart = sp->v.end + BLANK_LOOP_START;
 268                         sp->v.loopend = sp->v.end + BLANK_LOOP_END;
 269                 }
 270         }
 271
 272         /* add dram offset */
 273         sp->v.start += dram_start;
 274         sp->v.end += dram_start;
 275         sp->v.loopstart += dram_start;
 276         sp->v.loopend += dram_start;
 277
 278         snd_emu8000_close_dma(emu);
 279         snd_emu8000_init_fm(emu);
 280
 281         return 0;
 282 }
 283
 284 /*
 285  * free a sample block
 286  */
 287 int
 288 snd_emu8000_sample_free(struct snd_emux *rec, struct snd_sf_sample *sp,
 289                         struct snd_util_memhdr *hdr)
 290 {
 291         if (sp->block) {
 292                 snd_util_mem_free(hdr, sp->block);
 293                 sp->block = NULL;
 294         }
 295         return 0;
 296 }
 297
 298
 299 /*
 300  * sample_reset callback - terminate voices
 301  */
 302 void
 303 snd_emu8000_sample_reset(struct snd_emux *rec)
 304 {
 305         snd_emux_terminate_all(rec);
 306 }