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