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 26static int emu8000_reset_addr; 27module_param(emu8000_reset_addr, int, 0444); 28MODULE_PARM_DESC(emu8000_reset_addr, "reset write address at each time (makes slowdown)"); 29 30 31/* 32 * Open up channels. 33 */ 34static int 35snd_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 */ 61static void 62snd_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 */ 84static unsigned short 85read_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 */ 108static void 109snd_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 */ 130static inline void 131write_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 */ 146int 147snd_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 snd_assert(sp != NULL, return -EINVAL); 160 161 if (sp->v.size == 0) 162 return 0; 163 164 /* be sure loop points start < end */ 165 if (sp->v.loopstart > sp->v.loopend) { 166 int tmp = sp->v.loopstart; 167 sp->v.loopstart = sp->v.loopend; 168 sp->v.loopend = tmp; 169 } 170 171 /* compute true data size to be loaded */ 172 truesize = sp->v.size; 173 if (sp->v.mode_flags & (SNDRV_SFNT_SAMPLE_BIDIR_LOOP|SNDRV_SFNT_SAMPLE_REVERSE_LOOP)) 174 truesize += sp->v.loopend - sp->v.loopstart; 175 if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_NO_BLANK) 176 truesize += BLANK_LOOP_SIZE; 177 178 sp->block = snd_util_mem_alloc(hdr, truesize * 2); 179 if (sp->block == NULL) { 180 /*snd_printd("EMU8000: out of memory\n");*/ 181 /* not ENOMEM (for compatibility) */ 182 return -ENOSPC; 183 } 184 185 if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS) { 186 if (!access_ok(VERIFY_READ, data, sp->v.size)) 187 return -EFAULT; 188 } else { 189 if (!access_ok(VERIFY_READ, data, sp->v.size * 2)) 190 return -EFAULT; 191 } 192 193 /* recalculate address offset */ 194 sp->v.end -= sp->v.start; 195 sp->v.loopstart -= sp->v.start; 196 sp->v.loopend -= sp->v.start; 197 sp->v.start = 0; 198 199 /* dram position (in word) -- mem_offset is byte */ 200 dram_offset = EMU8000_DRAM_OFFSET + (sp->block->offset >> 1); 201 dram_start = dram_offset; 202 203 /* set the total size (store onto obsolete checksum value) */ 204 sp->v.truesize = truesize * 2; /* in bytes */ 205 206 snd_emux_terminate_all(emu->emu); 207 if ((rc = snd_emu8000_open_dma(emu, EMU8000_RAM_WRITE)) != 0) 208 return rc; 209 210 /* Set the address to start writing at */ 211 snd_emu8000_write_wait(emu); 212 EMU8000_SMALW_WRITE(emu, dram_offset); 213 214 /*snd_emu8000_init_fm(emu);*/ 215 216 217 offset = 0; 218 for (i = 0; i < sp->v.size; i++) { 219 unsigned short s; 220 221 s = read_word(data, offset, sp->v.mode_flags); 222 offset++; 223 write_word(emu, &dram_offset, s); 224 225 /* we may take too long time in this loop. 226 * so give controls back to kernel if needed. 227 */ 228 cond_resched(); 229 230 if (i == sp->v.loopend && 231 (sp->v.mode_flags & (SNDRV_SFNT_SAMPLE_BIDIR_LOOP|SNDRV_SFNT_SAMPLE_REVERSE_LOOP))) 232 { 233 int looplen = sp->v.loopend - sp->v.loopstart; 234 int k; 235 236 /* copy reverse loop */ 237 for (k = 1; k <= looplen; k++) { 238 s = read_word(data, offset - k, sp->v.mode_flags); 239 write_word(emu, &dram_offset, s); 240 } 241 if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_BIDIR_LOOP) { 242 sp->v.loopend += looplen; 243 } else { 244 sp->v.loopstart += looplen; 245 sp->v.loopend += looplen; 246 } 247 sp->v.end += looplen; 248 } 249 } 250 251 /* if no blank loop is attached in the sample, add it */ 252 if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_NO_BLANK) { 253 for (i = 0; i < BLANK_LOOP_SIZE; i++) { 254 write_word(emu, &dram_offset, 0); 255 } 256 if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_SINGLESHOT) { 257 sp->v.loopstart = sp->v.end + BLANK_LOOP_START; 258 sp->v.loopend = sp->v.end + BLANK_LOOP_END; 259 } 260 } 261 262 /* add dram offset */ 263 sp->v.start += dram_start; 264 sp->v.end += dram_start; 265 sp->v.loopstart += dram_start; 266 sp->v.loopend += dram_start; 267 268 snd_emu8000_close_dma(emu); 269 snd_emu8000_init_fm(emu); 270 271 return 0; 272} 273 274/* 275 * free a sample block 276 */ 277int 278snd_emu8000_sample_free(struct snd_emux *rec, struct snd_sf_sample *sp, 279 struct snd_util_memhdr *hdr) 280{ 281 if (sp->block) { 282 snd_util_mem_free(hdr, sp->block); 283 sp->block = NULL; 284 } 285 return 0; 286} 287 288 289/* 290 * sample_reset callback - terminate voices 291 */ 292void 293snd_emu8000_sample_reset(struct snd_emux *rec) 294{ 295 snd_emux_terminate_all(rec); 296} 297