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 <linux/uaccess.h> 24 #include <linux/moduleparam.h> 25 26 static int emu8000_reset_addr; 27 module_param(emu8000_reset_addr, int, 0444); 28 MODULE_PARM_DESC(emu8000_reset_addr, "reset write address at each time (makes slowdown)"); 29 30 31 /* 32 * Open up channels. 33 */ 34 static int 35 snd_emu8000_open_dma(struct snd_emu8000 *emu, int write) 36 { 37 int i; 38 39 /* reserve all 30 voices for loading */ 40 for (i = 0; i < EMU8000_DRAM_VOICES; i++) { 41 snd_emux_lock_voice(emu->emu, i); 42 snd_emu8000_dma_chan(emu, i, write); 43 } 44 45 /* assign voice 31 and 32 to ROM */ 46 EMU8000_VTFT_WRITE(emu, 30, 0); 47 EMU8000_PSST_WRITE(emu, 30, 0x1d8); 48 EMU8000_CSL_WRITE(emu, 30, 0x1e0); 49 EMU8000_CCCA_WRITE(emu, 30, 0x1d8); 50 EMU8000_VTFT_WRITE(emu, 31, 0); 51 EMU8000_PSST_WRITE(emu, 31, 0x1d8); 52 EMU8000_CSL_WRITE(emu, 31, 0x1e0); 53 EMU8000_CCCA_WRITE(emu, 31, 0x1d8); 54 55 return 0; 56 } 57 58 /* 59 * Close all dram channels. 60 */ 61 static void 62 snd_emu8000_close_dma(struct snd_emu8000 *emu) 63 { 64 int i; 65 66 for (i = 0; i < EMU8000_DRAM_VOICES; i++) { 67 snd_emu8000_dma_chan(emu, i, EMU8000_RAM_CLOSE); 68 snd_emux_unlock_voice(emu->emu, i); 69 } 70 } 71 72 /* 73 */ 74 75 #define BLANK_LOOP_START 4 76 #define BLANK_LOOP_END 8 77 #define BLANK_LOOP_SIZE 12 78 #define BLANK_HEAD_SIZE 48 79 80 /* 81 * Read a word from userland, taking care of conversions from 82 * 8bit samples etc. 83 */ 84 static unsigned short 85 read_word(const void __user *buf, int offset, int mode) 86 { 87 unsigned short c; 88 if (mode & SNDRV_SFNT_SAMPLE_8BITS) { 89 unsigned char cc; 90 get_user(cc, (unsigned char __user *)buf + offset); 91 c = cc << 8; /* convert 8bit -> 16bit */ 92 } else { 93 #ifdef SNDRV_LITTLE_ENDIAN 94 get_user(c, (unsigned short __user *)buf + offset); 95 #else 96 unsigned short cc; 97 get_user(cc, (unsigned short __user *)buf + offset); 98 c = swab16(cc); 99 #endif 100 } 101 if (mode & SNDRV_SFNT_SAMPLE_UNSIGNED) 102 c ^= 0x8000; /* unsigned -> signed */ 103 return c; 104 } 105 106 /* 107 */ 108 static void 109 snd_emu8000_write_wait(struct snd_emu8000 *emu) 110 { 111 while ((EMU8000_SMALW_READ(emu) & 0x80000000) != 0) { 112 schedule_timeout_interruptible(1); 113 if (signal_pending(current)) 114 break; 115 } 116 } 117 118 /* 119 * write sample word data 120 * 121 * You should not have to keep resetting the address each time 122 * as the chip is supposed to step on the next address automatically. 123 * It mostly does, but during writes of some samples at random it 124 * completely loses words (every one in 16 roughly but with no 125 * obvious pattern). 126 * 127 * This is therefore much slower than need be, but is at least 128 * working. 129 */ 130 static inline void 131 write_word(struct snd_emu8000 *emu, int *offset, unsigned short data) 132 { 133 if (emu8000_reset_addr) { 134 if (emu8000_reset_addr > 1) 135 snd_emu8000_write_wait(emu); 136 EMU8000_SMALW_WRITE(emu, *offset); 137 } 138 EMU8000_SMLD_WRITE(emu, data); 139 *offset += 1; 140 } 141 142 /* 143 * Write the sample to EMU800 memory. This routine is invoked out of 144 * the generic soundfont routines as a callback. 145 */ 146 int 147 snd_emu8000_sample_new(struct snd_emux *rec, struct snd_sf_sample *sp, 148 struct snd_util_memhdr *hdr, 149 const void __user *data, long count) 150 { 151 int i; 152 int rc; 153 int offset; 154 int truesize; 155 int dram_offset, dram_start; 156 struct snd_emu8000 *emu; 157 158 emu = rec->hw; 159 if (snd_BUG_ON(!sp)) 160 return -EINVAL; 161 162 if (sp->v.size == 0) 163 return 0; 164 165 /* be sure loop points start < end */ 166 if (sp->v.loopstart > sp->v.loopend) { 167 int tmp = sp->v.loopstart; 168 sp->v.loopstart = sp->v.loopend; 169 sp->v.loopend = tmp; 170 } 171 172 /* compute true data size to be loaded */ 173 truesize = sp->v.size; 174 if (sp->v.mode_flags & (SNDRV_SFNT_SAMPLE_BIDIR_LOOP|SNDRV_SFNT_SAMPLE_REVERSE_LOOP)) 175 truesize += sp->v.loopend - sp->v.loopstart; 176 if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_NO_BLANK) 177 truesize += BLANK_LOOP_SIZE; 178 179 sp->block = snd_util_mem_alloc(hdr, truesize * 2); 180 if (sp->block == NULL) { 181 /*snd_printd("EMU8000: out of memory\n");*/ 182 /* not ENOMEM (for compatibility) */ 183 return -ENOSPC; 184 } 185 186 if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS) { 187 if (!access_ok(VERIFY_READ, data, sp->v.size)) 188 return -EFAULT; 189 } else { 190 if (!access_ok(VERIFY_READ, data, sp->v.size * 2)) 191 return -EFAULT; 192 } 193 194 /* recalculate address offset */ 195 sp->v.end -= sp->v.start; 196 sp->v.loopstart -= sp->v.start; 197 sp->v.loopend -= sp->v.start; 198 sp->v.start = 0; 199 200 /* dram position (in word) -- mem_offset is byte */ 201 dram_offset = EMU8000_DRAM_OFFSET + (sp->block->offset >> 1); 202 dram_start = dram_offset; 203 204 /* set the total size (store onto obsolete checksum value) */ 205 sp->v.truesize = truesize * 2; /* in bytes */ 206 207 snd_emux_terminate_all(emu->emu); 208 if ((rc = snd_emu8000_open_dma(emu, EMU8000_RAM_WRITE)) != 0) 209 return rc; 210 211 /* Set the address to start writing at */ 212 snd_emu8000_write_wait(emu); 213 EMU8000_SMALW_WRITE(emu, dram_offset); 214 215 /*snd_emu8000_init_fm(emu);*/ 216 217 #if 0 218 /* first block - write 48 samples for silence */ 219 if (! sp->block->offset) { 220 for (i = 0; i < BLANK_HEAD_SIZE; i++) { 221 write_word(emu, &dram_offset, 0); 222 } 223 } 224 #endif 225 226 offset = 0; 227 for (i = 0; i < sp->v.size; i++) { 228 unsigned short s; 229 230 s = read_word(data, offset, sp->v.mode_flags); 231 offset++; 232 write_word(emu, &dram_offset, s); 233 234 /* we may take too long time in this loop. 235 * so give controls back to kernel if needed. 236 */ 237 cond_resched(); 238 239 if (i == sp->v.loopend && 240 (sp->v.mode_flags & (SNDRV_SFNT_SAMPLE_BIDIR_LOOP|SNDRV_SFNT_SAMPLE_REVERSE_LOOP))) 241 { 242 int looplen = sp->v.loopend - sp->v.loopstart; 243 int k; 244 245 /* copy reverse loop */ 246 for (k = 1; k <= looplen; k++) { 247 s = read_word(data, offset - k, sp->v.mode_flags); 248 write_word(emu, &dram_offset, s); 249 } 250 if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_BIDIR_LOOP) { 251 sp->v.loopend += looplen; 252 } else { 253 sp->v.loopstart += looplen; 254 sp->v.loopend += looplen; 255 } 256 sp->v.end += looplen; 257 } 258 } 259 260 /* if no blank loop is attached in the sample, add it */ 261 if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_NO_BLANK) { 262 for (i = 0; i < BLANK_LOOP_SIZE; i++) { 263 write_word(emu, &dram_offset, 0); 264 } 265 if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_SINGLESHOT) { 266 sp->v.loopstart = sp->v.end + BLANK_LOOP_START; 267 sp->v.loopend = sp->v.end + BLANK_LOOP_END; 268 } 269 } 270 271 /* add dram offset */ 272 sp->v.start += dram_start; 273 sp->v.end += dram_start; 274 sp->v.loopstart += dram_start; 275 sp->v.loopend += dram_start; 276 277 snd_emu8000_close_dma(emu); 278 snd_emu8000_init_fm(emu); 279 280 return 0; 281 } 282 283 /* 284 * free a sample block 285 */ 286 int 287 snd_emu8000_sample_free(struct snd_emux *rec, struct snd_sf_sample *sp, 288 struct snd_util_memhdr *hdr) 289 { 290 if (sp->block) { 291 snd_util_mem_free(hdr, sp->block); 292 sp->block = NULL; 293 } 294 return 0; 295 } 296 297 298 /* 299 * sample_reset callback - terminate voices 300 */ 301 void 302 snd_emu8000_sample_reset(struct snd_emux *rec) 303 { 304 snd_emux_terminate_all(rec); 305 } 306