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
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
snd_emu8000_open_dma(struct snd_emu8000 * emu,int write)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
snd_emu8000_close_dma(struct snd_emu8000 * emu)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
read_word(const void __user * buf,int offset,int mode)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
snd_emu8000_write_wait(struct snd_emu8000 * emu)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
write_word(struct snd_emu8000 * emu,int * offset,unsigned short data)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
snd_emu8000_sample_new(struct snd_emux * rec,struct snd_sf_sample * sp,struct snd_util_memhdr * hdr,const void __user * data,long count)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
snd_emu8000_sample_free(struct snd_emux * rec,struct snd_sf_sample * sp,struct snd_util_memhdr * hdr)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
snd_emu8000_sample_reset(struct snd_emux * rec)302 snd_emu8000_sample_reset(struct snd_emux *rec)
303 {
304 snd_emux_terminate_all(rec);
305 }
306