2 * Patch routines for the emu8000 (AWE32/64)
4 * Copyright (C) 1999 Steve Ratcliffe
5 * Copyright (C) 1999-2000 Takashi Iwai <tiwai@suse.de>
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.
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.
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
22 #include "emu8000_local.h"
23 #include <asm/uaccess.h>
24 #include <linux/moduleparam.h>
26 static int emu8000_reset_addr = 0;
27 module_param(emu8000_reset_addr, int, 0444);
28 MODULE_PARM_DESC(emu8000_reset_addr, "reset write address at each time (makes slowdown)");
35 snd_emu8000_open_dma(emu8000_t *emu, int write)
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);
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);
59 * Close all dram channels.
62 snd_emu8000_close_dma(emu8000_t *emu)
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);
75 #define BLANK_LOOP_START 4
76 #define BLANK_LOOP_END 8
77 #define BLANK_LOOP_SIZE 12
78 #define BLANK_HEAD_SIZE 48
81 * Read a word from userland, taking care of conversions from
85 read_word(const void __user *buf, int offset, int mode)
88 if (mode & SNDRV_SFNT_SAMPLE_8BITS) {
90 get_user(cc, (unsigned char __user *)buf + offset);
91 c = cc << 8; /* convert 8bit -> 16bit */
93 #ifdef SNDRV_LITTLE_ENDIAN
94 get_user(c, (unsigned short __user *)buf + offset);
97 get_user(cc, (unsigned short __user *)buf + offset);
101 if (mode & SNDRV_SFNT_SAMPLE_UNSIGNED)
102 c ^= 0x8000; /* unsigned -> signed */
109 snd_emu8000_write_wait(emu8000_t *emu)
111 while ((EMU8000_SMALW_READ(emu) & 0x80000000) != 0) {
112 set_current_state(TASK_INTERRUPTIBLE);
114 if (signal_pending(current))
120 * write sample word data
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
128 * This is therefore much slower than need be, but is at least
132 write_word(emu8000_t *emu, int *offset, unsigned short data)
134 if (emu8000_reset_addr) {
135 if (emu8000_reset_addr > 1)
136 snd_emu8000_write_wait(emu);
137 EMU8000_SMALW_WRITE(emu, *offset);
139 EMU8000_SMLD_WRITE(emu, data);
144 * Write the sample to EMU800 memory. This routine is invoked out of
145 * the generic soundfont routines as a callback.
148 snd_emu8000_sample_new(snd_emux_t *rec, snd_sf_sample_t *sp,
149 snd_util_memhdr_t *hdr, const void __user *data, long count)
155 int dram_offset, dram_start;
159 snd_assert(sp != NULL, return -EINVAL);
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;
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;
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) */
185 if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_8BITS) {
186 if (!access_ok(VERIFY_READ, data, sp->v.size))
189 if (!access_ok(VERIFY_READ, data, sp->v.size * 2))
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;
199 /* dram position (in word) -- mem_offset is byte */
200 dram_offset = EMU8000_DRAM_OFFSET + (sp->block->offset >> 1);
201 dram_start = dram_offset;
203 /* set the total size (store onto obsolete checksum value) */
204 sp->v.truesize = truesize * 2; /* in bytes */
206 snd_emux_terminate_all(emu->emu);
207 if ((rc = snd_emu8000_open_dma(emu, EMU8000_RAM_WRITE)) != 0)
210 /* Set the address to start writing at */
211 snd_emu8000_write_wait(emu);
212 EMU8000_SMALW_WRITE(emu, dram_offset);
214 /*snd_emu8000_init_fm(emu);*/
217 /* first block - write 48 samples for silence */
218 if (! sp->block->offset) {
219 for (i = 0; i < BLANK_HEAD_SIZE; i++) {
220 write_word(emu, &dram_offset, 0);
226 for (i = 0; i < sp->v.size; i++) {
229 s = read_word(data, offset, sp->v.mode_flags);
231 write_word(emu, &dram_offset, s);
233 /* we may take too long time in this loop.
234 * so give controls back to kernel if needed.
238 if (i == sp->v.loopend &&
239 (sp->v.mode_flags & (SNDRV_SFNT_SAMPLE_BIDIR_LOOP|SNDRV_SFNT_SAMPLE_REVERSE_LOOP)))
241 int looplen = sp->v.loopend - sp->v.loopstart;
244 /* copy reverse loop */
245 for (k = 1; k <= looplen; k++) {
246 s = read_word(data, offset - k, sp->v.mode_flags);
247 write_word(emu, &dram_offset, s);
249 if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_BIDIR_LOOP) {
250 sp->v.loopend += looplen;
252 sp->v.loopstart += looplen;
253 sp->v.loopend += looplen;
255 sp->v.end += looplen;
259 /* if no blank loop is attached in the sample, add it */
260 if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_NO_BLANK) {
261 for (i = 0; i < BLANK_LOOP_SIZE; i++) {
262 write_word(emu, &dram_offset, 0);
264 if (sp->v.mode_flags & SNDRV_SFNT_SAMPLE_SINGLESHOT) {
265 sp->v.loopstart = sp->v.end + BLANK_LOOP_START;
266 sp->v.loopend = sp->v.end + BLANK_LOOP_END;
270 /* add dram offset */
271 sp->v.start += dram_start;
272 sp->v.end += dram_start;
273 sp->v.loopstart += dram_start;
274 sp->v.loopend += dram_start;
276 snd_emu8000_close_dma(emu);
277 snd_emu8000_init_fm(emu);
283 * free a sample block
286 snd_emu8000_sample_free(snd_emux_t *rec, snd_sf_sample_t *sp, snd_util_memhdr_t *hdr)
289 snd_util_mem_free(hdr, sp->block);
297 * sample_reset callback - terminate voices
300 snd_emu8000_sample_reset(snd_emux_t *rec)
302 snd_emux_terminate_all(rec);