Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | btaudio - bt878 audio dma driver for linux 2.4.x | |
3 | ||
4 | (c) 2000-2002 Gerd Knorr <kraxel@bytesex.org> | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
19 | ||
20 | */ | |
21 | ||
22 | #include <linux/module.h> | |
23 | #include <linux/errno.h> | |
24 | #include <linux/pci.h> | |
25 | #include <linux/sched.h> | |
26 | #include <linux/signal.h> | |
27 | #include <linux/types.h> | |
28 | #include <linux/interrupt.h> | |
29 | #include <linux/init.h> | |
30 | #include <linux/poll.h> | |
31 | #include <linux/sound.h> | |
32 | #include <linux/soundcard.h> | |
33 | #include <linux/slab.h> | |
34 | #include <linux/kdev_t.h> | |
35 | #include <asm/uaccess.h> | |
36 | #include <asm/io.h> | |
37 | ||
38 | ||
39 | /* mmio access */ | |
40 | #define btwrite(dat,adr) writel((dat), (bta->mmio+(adr))) | |
41 | #define btread(adr) readl(bta->mmio+(adr)) | |
42 | ||
43 | #define btand(dat,adr) btwrite((dat) & btread(adr), adr) | |
44 | #define btor(dat,adr) btwrite((dat) | btread(adr), adr) | |
45 | #define btaor(dat,mask,adr) btwrite((dat) | ((mask) & btread(adr)), adr) | |
46 | ||
47 | /* registers (shifted because bta->mmio is long) */ | |
48 | #define REG_INT_STAT (0x100 >> 2) | |
49 | #define REG_INT_MASK (0x104 >> 2) | |
50 | #define REG_GPIO_DMA_CTL (0x10c >> 2) | |
51 | #define REG_PACKET_LEN (0x110 >> 2) | |
52 | #define REG_RISC_STRT_ADD (0x114 >> 2) | |
53 | #define REG_RISC_COUNT (0x120 >> 2) | |
54 | ||
55 | /* IRQ bits - REG_INT_(STAT|MASK) */ | |
56 | #define IRQ_SCERR (1 << 19) | |
57 | #define IRQ_OCERR (1 << 18) | |
58 | #define IRQ_PABORT (1 << 17) | |
59 | #define IRQ_RIPERR (1 << 16) | |
60 | #define IRQ_PPERR (1 << 15) | |
61 | #define IRQ_FDSR (1 << 14) | |
62 | #define IRQ_FTRGT (1 << 13) | |
63 | #define IRQ_FBUS (1 << 12) | |
64 | #define IRQ_RISCI (1 << 11) | |
65 | #define IRQ_OFLOW (1 << 3) | |
66 | ||
67 | #define IRQ_BTAUDIO (IRQ_SCERR | IRQ_OCERR | IRQ_PABORT | IRQ_RIPERR |\ | |
68 | IRQ_PPERR | IRQ_FDSR | IRQ_FTRGT | IRQ_FBUS |\ | |
69 | IRQ_RISCI) | |
70 | ||
71 | /* REG_GPIO_DMA_CTL bits */ | |
72 | #define DMA_CTL_A_PWRDN (1 << 26) | |
73 | #define DMA_CTL_DA_SBR (1 << 14) | |
74 | #define DMA_CTL_DA_ES2 (1 << 13) | |
75 | #define DMA_CTL_ACAP_EN (1 << 4) | |
76 | #define DMA_CTL_RISC_EN (1 << 1) | |
77 | #define DMA_CTL_FIFO_EN (1 << 0) | |
78 | ||
79 | /* RISC instructions */ | |
80 | #define RISC_WRITE (0x01 << 28) | |
81 | #define RISC_JUMP (0x07 << 28) | |
82 | #define RISC_SYNC (0x08 << 28) | |
83 | ||
84 | /* RISC bits */ | |
85 | #define RISC_WR_SOL (1 << 27) | |
86 | #define RISC_WR_EOL (1 << 26) | |
87 | #define RISC_IRQ (1 << 24) | |
88 | #define RISC_SYNC_RESYNC (1 << 15) | |
89 | #define RISC_SYNC_FM1 0x06 | |
90 | #define RISC_SYNC_VRO 0x0c | |
91 | ||
92 | #define HWBASE_AD (448000) | |
93 | ||
94 | /* -------------------------------------------------------------- */ | |
95 | ||
96 | struct btaudio { | |
97 | /* linked list */ | |
98 | struct btaudio *next; | |
99 | ||
100 | /* device info */ | |
101 | int dsp_digital; | |
102 | int dsp_analog; | |
103 | int mixer_dev; | |
104 | struct pci_dev *pci; | |
105 | unsigned int irq; | |
106 | unsigned long mem; | |
107 | unsigned long __iomem *mmio; | |
108 | ||
109 | /* locking */ | |
110 | int users; | |
111 | struct semaphore lock; | |
112 | ||
113 | /* risc instructions */ | |
114 | unsigned int risc_size; | |
115 | unsigned long *risc_cpu; | |
116 | dma_addr_t risc_dma; | |
117 | ||
118 | /* audio data */ | |
119 | unsigned int buf_size; | |
120 | unsigned char *buf_cpu; | |
121 | dma_addr_t buf_dma; | |
122 | ||
123 | /* buffer setup */ | |
124 | int line_bytes; | |
125 | int line_count; | |
126 | int block_bytes; | |
127 | int block_count; | |
128 | ||
129 | /* read fifo management */ | |
130 | int recording; | |
131 | int dma_block; | |
132 | int read_offset; | |
133 | int read_count; | |
134 | wait_queue_head_t readq; | |
135 | ||
136 | /* settings */ | |
137 | int gain[3]; | |
138 | int source; | |
139 | int bits; | |
140 | int decimation; | |
141 | int mixcount; | |
142 | int sampleshift; | |
143 | int channels; | |
144 | int analog; | |
145 | int rate; | |
146 | }; | |
147 | ||
148 | struct cardinfo { | |
149 | char *name; | |
150 | int rate; | |
151 | }; | |
152 | ||
153 | static struct btaudio *btaudios; | |
154 | static unsigned int debug; | |
155 | static unsigned int irq_debug; | |
156 | ||
157 | /* -------------------------------------------------------------- */ | |
158 | ||
159 | #define BUF_DEFAULT 128*1024 | |
160 | #define BUF_MIN 8192 | |
161 | ||
162 | static int alloc_buffer(struct btaudio *bta) | |
163 | { | |
164 | if (NULL == bta->buf_cpu) { | |
165 | for (bta->buf_size = BUF_DEFAULT; bta->buf_size >= BUF_MIN; | |
166 | bta->buf_size = bta->buf_size >> 1) { | |
167 | bta->buf_cpu = pci_alloc_consistent | |
168 | (bta->pci, bta->buf_size, &bta->buf_dma); | |
169 | if (NULL != bta->buf_cpu) | |
170 | break; | |
171 | } | |
172 | if (NULL == bta->buf_cpu) | |
173 | return -ENOMEM; | |
174 | memset(bta->buf_cpu,0,bta->buf_size); | |
175 | } | |
176 | if (NULL == bta->risc_cpu) { | |
177 | bta->risc_size = PAGE_SIZE; | |
178 | bta->risc_cpu = pci_alloc_consistent | |
179 | (bta->pci, bta->risc_size, &bta->risc_dma); | |
180 | if (NULL == bta->risc_cpu) { | |
181 | pci_free_consistent(bta->pci, bta->buf_size, bta->buf_cpu, bta->buf_dma); | |
182 | bta->buf_cpu = NULL; | |
183 | return -ENOMEM; | |
184 | } | |
185 | } | |
186 | return 0; | |
187 | } | |
188 | ||
189 | static void free_buffer(struct btaudio *bta) | |
190 | { | |
191 | if (NULL != bta->buf_cpu) { | |
192 | pci_free_consistent(bta->pci, bta->buf_size, | |
193 | bta->buf_cpu, bta->buf_dma); | |
194 | bta->buf_cpu = NULL; | |
195 | } | |
196 | if (NULL != bta->risc_cpu) { | |
197 | pci_free_consistent(bta->pci, bta->risc_size, | |
198 | bta->risc_cpu, bta->risc_dma); | |
199 | bta->risc_cpu = NULL; | |
200 | } | |
201 | } | |
202 | ||
203 | static int make_risc(struct btaudio *bta) | |
204 | { | |
205 | int rp, bp, line, block; | |
206 | unsigned long risc; | |
207 | ||
208 | bta->block_bytes = bta->buf_size >> 4; | |
209 | bta->block_count = 1 << 4; | |
210 | bta->line_bytes = bta->block_bytes; | |
211 | bta->line_count = bta->block_count; | |
212 | while (bta->line_bytes > 4095) { | |
213 | bta->line_bytes >>= 1; | |
214 | bta->line_count <<= 1; | |
215 | } | |
216 | if (bta->line_count > 255) | |
217 | return -EINVAL; | |
218 | if (debug) | |
219 | printk(KERN_DEBUG | |
220 | "btaudio: bufsize=%d - bs=%d bc=%d - ls=%d, lc=%d\n", | |
221 | bta->buf_size,bta->block_bytes,bta->block_count, | |
222 | bta->line_bytes,bta->line_count); | |
223 | rp = 0; bp = 0; | |
224 | block = 0; | |
225 | bta->risc_cpu[rp++] = cpu_to_le32(RISC_SYNC|RISC_SYNC_FM1); | |
226 | bta->risc_cpu[rp++] = cpu_to_le32(0); | |
227 | for (line = 0; line < bta->line_count; line++) { | |
228 | risc = RISC_WRITE | RISC_WR_SOL | RISC_WR_EOL; | |
229 | risc |= bta->line_bytes; | |
230 | if (0 == (bp & (bta->block_bytes-1))) { | |
231 | risc |= RISC_IRQ; | |
232 | risc |= (block & 0x0f) << 16; | |
233 | risc |= (~block & 0x0f) << 20; | |
234 | block++; | |
235 | } | |
236 | bta->risc_cpu[rp++] = cpu_to_le32(risc); | |
237 | bta->risc_cpu[rp++] = cpu_to_le32(bta->buf_dma + bp); | |
238 | bp += bta->line_bytes; | |
239 | } | |
240 | bta->risc_cpu[rp++] = cpu_to_le32(RISC_SYNC|RISC_SYNC_VRO); | |
241 | bta->risc_cpu[rp++] = cpu_to_le32(0); | |
242 | bta->risc_cpu[rp++] = cpu_to_le32(RISC_JUMP); | |
243 | bta->risc_cpu[rp++] = cpu_to_le32(bta->risc_dma); | |
244 | return 0; | |
245 | } | |
246 | ||
247 | static int start_recording(struct btaudio *bta) | |
248 | { | |
249 | int ret; | |
250 | ||
251 | if (0 != (ret = alloc_buffer(bta))) | |
252 | return ret; | |
253 | if (0 != (ret = make_risc(bta))) | |
254 | return ret; | |
255 | ||
256 | btwrite(bta->risc_dma, REG_RISC_STRT_ADD); | |
257 | btwrite((bta->line_count << 16) | bta->line_bytes, | |
258 | REG_PACKET_LEN); | |
259 | btwrite(IRQ_BTAUDIO, REG_INT_MASK); | |
260 | if (bta->analog) { | |
261 | btwrite(DMA_CTL_ACAP_EN | | |
262 | DMA_CTL_RISC_EN | | |
263 | DMA_CTL_FIFO_EN | | |
264 | DMA_CTL_DA_ES2 | | |
265 | ((bta->bits == 8) ? DMA_CTL_DA_SBR : 0) | | |
266 | (bta->gain[bta->source] << 28) | | |
267 | (bta->source << 24) | | |
268 | (bta->decimation << 8), | |
269 | REG_GPIO_DMA_CTL); | |
270 | } else { | |
271 | btwrite(DMA_CTL_ACAP_EN | | |
272 | DMA_CTL_RISC_EN | | |
273 | DMA_CTL_FIFO_EN | | |
274 | DMA_CTL_DA_ES2 | | |
275 | DMA_CTL_A_PWRDN | | |
276 | (1 << 6) | | |
277 | ((bta->bits == 8) ? DMA_CTL_DA_SBR : 0) | | |
278 | (bta->gain[bta->source] << 28) | | |
279 | (bta->source << 24) | | |
280 | (bta->decimation << 8), | |
281 | REG_GPIO_DMA_CTL); | |
282 | } | |
283 | bta->dma_block = 0; | |
284 | bta->read_offset = 0; | |
285 | bta->read_count = 0; | |
286 | bta->recording = 1; | |
287 | if (debug) | |
288 | printk(KERN_DEBUG "btaudio: recording started\n"); | |
289 | return 0; | |
290 | } | |
291 | ||
292 | static void stop_recording(struct btaudio *bta) | |
293 | { | |
294 | btand(~15, REG_GPIO_DMA_CTL); | |
295 | bta->recording = 0; | |
296 | if (debug) | |
297 | printk(KERN_DEBUG "btaudio: recording stopped\n"); | |
298 | } | |
299 | ||
300 | ||
301 | /* -------------------------------------------------------------- */ | |
302 | ||
303 | static int btaudio_mixer_open(struct inode *inode, struct file *file) | |
304 | { | |
305 | int minor = iminor(inode); | |
306 | struct btaudio *bta; | |
307 | ||
308 | for (bta = btaudios; bta != NULL; bta = bta->next) | |
309 | if (bta->mixer_dev == minor) | |
310 | break; | |
311 | if (NULL == bta) | |
312 | return -ENODEV; | |
313 | ||
314 | if (debug) | |
315 | printk("btaudio: open mixer [%d]\n",minor); | |
316 | file->private_data = bta; | |
317 | return 0; | |
318 | } | |
319 | ||
320 | static int btaudio_mixer_release(struct inode *inode, struct file *file) | |
321 | { | |
322 | return 0; | |
323 | } | |
324 | ||
325 | static int btaudio_mixer_ioctl(struct inode *inode, struct file *file, | |
326 | unsigned int cmd, unsigned long arg) | |
327 | { | |
328 | struct btaudio *bta = file->private_data; | |
329 | int ret,val=0,i=0; | |
330 | void __user *argp = (void __user *)arg; | |
331 | ||
332 | if (cmd == SOUND_MIXER_INFO) { | |
333 | mixer_info info; | |
334 | memset(&info,0,sizeof(info)); | |
335 | strlcpy(info.id,"bt878",sizeof(info.id)); | |
336 | strlcpy(info.name,"Brooktree Bt878 audio",sizeof(info.name)); | |
337 | info.modify_counter = bta->mixcount; | |
338 | if (copy_to_user(argp, &info, sizeof(info))) | |
339 | return -EFAULT; | |
340 | return 0; | |
341 | } | |
342 | if (cmd == SOUND_OLD_MIXER_INFO) { | |
343 | _old_mixer_info info; | |
344 | memset(&info,0,sizeof(info)); | |
345 | strlcpy(info.id,"bt878",sizeof(info.id)-1); | |
346 | strlcpy(info.name,"Brooktree Bt878 audio",sizeof(info.name)); | |
347 | if (copy_to_user(argp, &info, sizeof(info))) | |
348 | return -EFAULT; | |
349 | return 0; | |
350 | } | |
351 | if (cmd == OSS_GETVERSION) | |
352 | return put_user(SOUND_VERSION, (int __user *)argp); | |
353 | ||
354 | /* read */ | |
355 | if (_SIOC_DIR(cmd) & _SIOC_WRITE) | |
356 | if (get_user(val, (int __user *)argp)) | |
357 | return -EFAULT; | |
358 | ||
359 | switch (cmd) { | |
360 | case MIXER_READ(SOUND_MIXER_CAPS): | |
361 | ret = SOUND_CAP_EXCL_INPUT; | |
362 | break; | |
363 | case MIXER_READ(SOUND_MIXER_STEREODEVS): | |
364 | ret = 0; | |
365 | break; | |
366 | case MIXER_READ(SOUND_MIXER_RECMASK): | |
367 | case MIXER_READ(SOUND_MIXER_DEVMASK): | |
368 | ret = SOUND_MASK_LINE1|SOUND_MASK_LINE2|SOUND_MASK_LINE3; | |
369 | break; | |
370 | ||
371 | case MIXER_WRITE(SOUND_MIXER_RECSRC): | |
372 | if (val & SOUND_MASK_LINE1 && bta->source != 0) | |
373 | bta->source = 0; | |
374 | else if (val & SOUND_MASK_LINE2 && bta->source != 1) | |
375 | bta->source = 1; | |
376 | else if (val & SOUND_MASK_LINE3 && bta->source != 2) | |
377 | bta->source = 2; | |
378 | btaor((bta->gain[bta->source] << 28) | | |
379 | (bta->source << 24), | |
380 | 0x0cffffff, REG_GPIO_DMA_CTL); | |
381 | case MIXER_READ(SOUND_MIXER_RECSRC): | |
382 | switch (bta->source) { | |
383 | case 0: ret = SOUND_MASK_LINE1; break; | |
384 | case 1: ret = SOUND_MASK_LINE2; break; | |
385 | case 2: ret = SOUND_MASK_LINE3; break; | |
386 | default: ret = 0; | |
387 | } | |
388 | break; | |
389 | ||
390 | case MIXER_WRITE(SOUND_MIXER_LINE1): | |
391 | case MIXER_WRITE(SOUND_MIXER_LINE2): | |
392 | case MIXER_WRITE(SOUND_MIXER_LINE3): | |
393 | if (MIXER_WRITE(SOUND_MIXER_LINE1) == cmd) | |
394 | i = 0; | |
395 | if (MIXER_WRITE(SOUND_MIXER_LINE2) == cmd) | |
396 | i = 1; | |
397 | if (MIXER_WRITE(SOUND_MIXER_LINE3) == cmd) | |
398 | i = 2; | |
399 | bta->gain[i] = (val & 0xff) * 15 / 100; | |
400 | if (bta->gain[i] > 15) bta->gain[i] = 15; | |
401 | if (bta->gain[i] < 0) bta->gain[i] = 0; | |
402 | if (i == bta->source) | |
403 | btaor((bta->gain[bta->source]<<28), | |
404 | 0x0fffffff, REG_GPIO_DMA_CTL); | |
405 | ret = bta->gain[i] * 100 / 15; | |
406 | ret |= ret << 8; | |
407 | break; | |
408 | ||
409 | case MIXER_READ(SOUND_MIXER_LINE1): | |
410 | case MIXER_READ(SOUND_MIXER_LINE2): | |
411 | case MIXER_READ(SOUND_MIXER_LINE3): | |
412 | if (MIXER_READ(SOUND_MIXER_LINE1) == cmd) | |
413 | i = 0; | |
414 | if (MIXER_READ(SOUND_MIXER_LINE2) == cmd) | |
415 | i = 1; | |
416 | if (MIXER_READ(SOUND_MIXER_LINE3) == cmd) | |
417 | i = 2; | |
418 | ret = bta->gain[i] * 100 / 15; | |
419 | ret |= ret << 8; | |
420 | break; | |
421 | ||
422 | default: | |
423 | return -EINVAL; | |
424 | } | |
425 | if (put_user(ret, (int __user *)argp)) | |
426 | return -EFAULT; | |
427 | return 0; | |
428 | } | |
429 | ||
430 | static struct file_operations btaudio_mixer_fops = { | |
431 | .owner = THIS_MODULE, | |
432 | .llseek = no_llseek, | |
433 | .open = btaudio_mixer_open, | |
434 | .release = btaudio_mixer_release, | |
435 | .ioctl = btaudio_mixer_ioctl, | |
436 | }; | |
437 | ||
438 | /* -------------------------------------------------------------- */ | |
439 | ||
440 | static int btaudio_dsp_open(struct inode *inode, struct file *file, | |
441 | struct btaudio *bta, int analog) | |
442 | { | |
443 | down(&bta->lock); | |
444 | if (bta->users) | |
445 | goto busy; | |
446 | bta->users++; | |
447 | file->private_data = bta; | |
448 | ||
449 | bta->analog = analog; | |
450 | bta->dma_block = 0; | |
451 | bta->read_offset = 0; | |
452 | bta->read_count = 0; | |
453 | bta->sampleshift = 0; | |
454 | ||
455 | up(&bta->lock); | |
456 | return 0; | |
457 | ||
458 | busy: | |
459 | up(&bta->lock); | |
460 | return -EBUSY; | |
461 | } | |
462 | ||
463 | static int btaudio_dsp_open_digital(struct inode *inode, struct file *file) | |
464 | { | |
465 | int minor = iminor(inode); | |
466 | struct btaudio *bta; | |
467 | ||
468 | for (bta = btaudios; bta != NULL; bta = bta->next) | |
469 | if (bta->dsp_digital == minor) | |
470 | break; | |
471 | if (NULL == bta) | |
472 | return -ENODEV; | |
473 | ||
474 | if (debug) | |
475 | printk("btaudio: open digital dsp [%d]\n",minor); | |
476 | return btaudio_dsp_open(inode,file,bta,0); | |
477 | } | |
478 | ||
479 | static int btaudio_dsp_open_analog(struct inode *inode, struct file *file) | |
480 | { | |
481 | int minor = iminor(inode); | |
482 | struct btaudio *bta; | |
483 | ||
484 | for (bta = btaudios; bta != NULL; bta = bta->next) | |
485 | if (bta->dsp_analog == minor) | |
486 | break; | |
487 | if (NULL == bta) | |
488 | return -ENODEV; | |
489 | ||
490 | if (debug) | |
491 | printk("btaudio: open analog dsp [%d]\n",minor); | |
492 | return btaudio_dsp_open(inode,file,bta,1); | |
493 | } | |
494 | ||
495 | static int btaudio_dsp_release(struct inode *inode, struct file *file) | |
496 | { | |
497 | struct btaudio *bta = file->private_data; | |
498 | ||
499 | down(&bta->lock); | |
500 | if (bta->recording) | |
501 | stop_recording(bta); | |
502 | bta->users--; | |
503 | up(&bta->lock); | |
504 | return 0; | |
505 | } | |
506 | ||
507 | static ssize_t btaudio_dsp_read(struct file *file, char __user *buffer, | |
508 | size_t swcount, loff_t *ppos) | |
509 | { | |
510 | struct btaudio *bta = file->private_data; | |
511 | int hwcount = swcount << bta->sampleshift; | |
512 | int nsrc, ndst, err, ret = 0; | |
513 | DECLARE_WAITQUEUE(wait, current); | |
514 | ||
515 | add_wait_queue(&bta->readq, &wait); | |
516 | down(&bta->lock); | |
517 | while (swcount > 0) { | |
518 | if (0 == bta->read_count) { | |
519 | if (!bta->recording) { | |
520 | if (0 != (err = start_recording(bta))) { | |
521 | if (0 == ret) | |
522 | ret = err; | |
523 | break; | |
524 | } | |
525 | } | |
526 | if (file->f_flags & O_NONBLOCK) { | |
527 | if (0 == ret) | |
528 | ret = -EAGAIN; | |
529 | break; | |
530 | } | |
531 | up(&bta->lock); | |
532 | current->state = TASK_INTERRUPTIBLE; | |
533 | schedule(); | |
534 | down(&bta->lock); | |
535 | if(signal_pending(current)) { | |
536 | if (0 == ret) | |
537 | ret = -EINTR; | |
538 | break; | |
539 | } | |
540 | } | |
541 | nsrc = (bta->read_count < hwcount) ? bta->read_count : hwcount; | |
542 | if (nsrc > bta->buf_size - bta->read_offset) | |
543 | nsrc = bta->buf_size - bta->read_offset; | |
544 | ndst = nsrc >> bta->sampleshift; | |
545 | ||
546 | if ((bta->analog && 0 == bta->sampleshift) || | |
547 | (!bta->analog && 2 == bta->channels)) { | |
548 | /* just copy */ | |
549 | if (copy_to_user(buffer + ret, bta->buf_cpu + bta->read_offset, nsrc)) { | |
550 | if (0 == ret) | |
551 | ret = -EFAULT; | |
552 | break; | |
553 | } | |
554 | ||
555 | } else if (!bta->analog) { | |
556 | /* stereo => mono (digital audio) */ | |
557 | __s16 *src = (__s16*)(bta->buf_cpu + bta->read_offset); | |
558 | __s16 __user *dst = (__s16 __user *)(buffer + ret); | |
559 | __s16 avg; | |
560 | int n = ndst>>1; | |
561 | if (!access_ok(VERIFY_WRITE, dst, ndst)) { | |
562 | if (0 == ret) | |
563 | ret = -EFAULT; | |
564 | break; | |
565 | } | |
566 | for (; n; n--, dst++) { | |
567 | avg = (__s16)le16_to_cpu(*src) / 2; src++; | |
568 | avg += (__s16)le16_to_cpu(*src) / 2; src++; | |
569 | __put_user(cpu_to_le16(avg),dst); | |
570 | } | |
571 | ||
572 | } else if (8 == bta->bits) { | |
573 | /* copy + byte downsampling (audio A/D) */ | |
574 | __u8 *src = bta->buf_cpu + bta->read_offset; | |
575 | __u8 __user *dst = buffer + ret; | |
576 | int n = ndst; | |
577 | if (!access_ok(VERIFY_WRITE, dst, ndst)) { | |
578 | if (0 == ret) | |
579 | ret = -EFAULT; | |
580 | break; | |
581 | } | |
582 | for (; n; n--, src += (1 << bta->sampleshift), dst++) | |
583 | __put_user(*src, dst); | |
584 | ||
585 | } else { | |
586 | /* copy + word downsampling (audio A/D) */ | |
587 | __u16 *src = (__u16*)(bta->buf_cpu + bta->read_offset); | |
588 | __u16 __user *dst = (__u16 __user *)(buffer + ret); | |
589 | int n = ndst>>1; | |
590 | if (!access_ok(VERIFY_WRITE,dst,ndst)) { | |
591 | if (0 == ret) | |
592 | ret = -EFAULT; | |
593 | break; | |
594 | } | |
595 | for (; n; n--, src += (1 << bta->sampleshift), dst++) | |
596 | __put_user(*src, dst); | |
597 | } | |
598 | ||
599 | ret += ndst; | |
600 | swcount -= ndst; | |
601 | hwcount -= nsrc; | |
602 | bta->read_count -= nsrc; | |
603 | bta->read_offset += nsrc; | |
604 | if (bta->read_offset == bta->buf_size) | |
605 | bta->read_offset = 0; | |
606 | } | |
607 | up(&bta->lock); | |
608 | remove_wait_queue(&bta->readq, &wait); | |
609 | current->state = TASK_RUNNING; | |
610 | return ret; | |
611 | } | |
612 | ||
613 | static ssize_t btaudio_dsp_write(struct file *file, const char __user *buffer, | |
614 | size_t count, loff_t *ppos) | |
615 | { | |
616 | return -EINVAL; | |
617 | } | |
618 | ||
619 | static int btaudio_dsp_ioctl(struct inode *inode, struct file *file, | |
620 | unsigned int cmd, unsigned long arg) | |
621 | { | |
622 | struct btaudio *bta = file->private_data; | |
623 | int s, i, ret, val = 0; | |
624 | void __user *argp = (void __user *)arg; | |
625 | int __user *p = argp; | |
626 | ||
627 | switch (cmd) { | |
628 | case OSS_GETVERSION: | |
629 | return put_user(SOUND_VERSION, p); | |
630 | case SNDCTL_DSP_GETCAPS: | |
631 | return 0; | |
632 | ||
633 | case SNDCTL_DSP_SPEED: | |
634 | if (get_user(val, p)) | |
635 | return -EFAULT; | |
636 | if (bta->analog) { | |
637 | for (s = 0; s < 16; s++) | |
638 | if (val << s >= HWBASE_AD*4/15) | |
639 | break; | |
640 | for (i = 15; i >= 5; i--) | |
641 | if (val << s <= HWBASE_AD*4/i) | |
642 | break; | |
643 | bta->sampleshift = s; | |
644 | bta->decimation = i; | |
645 | if (debug) | |
646 | printk(KERN_DEBUG "btaudio: rate: req=%d " | |
647 | "dec=%d shift=%d hwrate=%d swrate=%d\n", | |
648 | val,i,s,(HWBASE_AD*4/i),(HWBASE_AD*4/i)>>s); | |
649 | } else { | |
650 | bta->sampleshift = (bta->channels == 2) ? 0 : 1; | |
651 | bta->decimation = 0; | |
652 | } | |
653 | if (bta->recording) { | |
654 | down(&bta->lock); | |
655 | stop_recording(bta); | |
656 | start_recording(bta); | |
657 | up(&bta->lock); | |
658 | } | |
659 | /* fall through */ | |
660 | case SOUND_PCM_READ_RATE: | |
661 | if (bta->analog) { | |
662 | return put_user(HWBASE_AD*4/bta->decimation>>bta->sampleshift, p); | |
663 | } else { | |
664 | return put_user(bta->rate, p); | |
665 | } | |
666 | ||
667 | case SNDCTL_DSP_STEREO: | |
668 | if (!bta->analog) { | |
669 | if (get_user(val, p)) | |
670 | return -EFAULT; | |
671 | bta->channels = (val > 0) ? 2 : 1; | |
672 | bta->sampleshift = (bta->channels == 2) ? 0 : 1; | |
673 | if (debug) | |
674 | printk(KERN_INFO | |
675 | "btaudio: stereo=%d channels=%d\n", | |
676 | val,bta->channels); | |
677 | } else { | |
678 | if (val == 1) | |
679 | return -EFAULT; | |
680 | else { | |
681 | bta->channels = 1; | |
682 | if (debug) | |
683 | printk(KERN_INFO | |
684 | "btaudio: stereo=0 channels=1\n"); | |
685 | } | |
686 | } | |
687 | return put_user((bta->channels)-1, p); | |
688 | ||
689 | case SNDCTL_DSP_CHANNELS: | |
690 | if (!bta->analog) { | |
691 | if (get_user(val, p)) | |
692 | return -EFAULT; | |
693 | bta->channels = (val > 1) ? 2 : 1; | |
694 | bta->sampleshift = (bta->channels == 2) ? 0 : 1; | |
695 | if (debug) | |
696 | printk(KERN_DEBUG | |
697 | "btaudio: val=%d channels=%d\n", | |
698 | val,bta->channels); | |
699 | } | |
700 | /* fall through */ | |
701 | case SOUND_PCM_READ_CHANNELS: | |
702 | return put_user(bta->channels, p); | |
703 | ||
704 | case SNDCTL_DSP_GETFMTS: /* Returns a mask */ | |
705 | if (bta->analog) | |
706 | return put_user(AFMT_S16_LE|AFMT_S8, p); | |
707 | else | |
708 | return put_user(AFMT_S16_LE, p); | |
709 | ||
710 | case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/ | |
711 | if (get_user(val, p)) | |
712 | return -EFAULT; | |
713 | if (val != AFMT_QUERY) { | |
714 | if (bta->analog) | |
715 | bta->bits = (val == AFMT_S8) ? 8 : 16; | |
716 | else | |
717 | bta->bits = 16; | |
718 | if (bta->recording) { | |
719 | down(&bta->lock); | |
720 | stop_recording(bta); | |
721 | start_recording(bta); | |
722 | up(&bta->lock); | |
723 | } | |
724 | } | |
725 | if (debug) | |
726 | printk(KERN_DEBUG "btaudio: fmt: bits=%d\n",bta->bits); | |
727 | return put_user((bta->bits==16) ? AFMT_S16_LE : AFMT_S8, | |
728 | p); | |
729 | break; | |
730 | case SOUND_PCM_READ_BITS: | |
731 | return put_user(bta->bits, p); | |
732 | ||
733 | case SNDCTL_DSP_NONBLOCK: | |
734 | file->f_flags |= O_NONBLOCK; | |
735 | return 0; | |
736 | ||
737 | case SNDCTL_DSP_RESET: | |
738 | if (bta->recording) { | |
739 | down(&bta->lock); | |
740 | stop_recording(bta); | |
741 | up(&bta->lock); | |
742 | } | |
743 | return 0; | |
744 | case SNDCTL_DSP_GETBLKSIZE: | |
745 | if (!bta->recording) { | |
746 | if (0 != (ret = alloc_buffer(bta))) | |
747 | return ret; | |
748 | if (0 != (ret = make_risc(bta))) | |
749 | return ret; | |
750 | } | |
751 | return put_user(bta->block_bytes>>bta->sampleshift,p); | |
752 | ||
753 | case SNDCTL_DSP_SYNC: | |
754 | /* NOP */ | |
755 | return 0; | |
756 | case SNDCTL_DSP_GETISPACE: | |
757 | { | |
758 | audio_buf_info info; | |
759 | if (!bta->recording) | |
760 | return -EINVAL; | |
761 | info.fragsize = bta->block_bytes>>bta->sampleshift; | |
762 | info.fragstotal = bta->block_count; | |
763 | info.bytes = bta->read_count; | |
764 | info.fragments = info.bytes / info.fragsize; | |
765 | if (debug) | |
766 | printk(KERN_DEBUG "btaudio: SNDCTL_DSP_GETISPACE " | |
767 | "returns %d/%d/%d/%d\n", | |
768 | info.fragsize, info.fragstotal, | |
769 | info.bytes, info.fragments); | |
770 | if (copy_to_user(argp, &info, sizeof(info))) | |
771 | return -EFAULT; | |
772 | return 0; | |
773 | } | |
774 | #if 0 /* TODO */ | |
775 | case SNDCTL_DSP_GETTRIGGER: | |
776 | case SNDCTL_DSP_SETTRIGGER: | |
777 | case SNDCTL_DSP_SETFRAGMENT: | |
778 | #endif | |
779 | default: | |
780 | return -EINVAL; | |
781 | } | |
782 | } | |
783 | ||
784 | static unsigned int btaudio_dsp_poll(struct file *file, struct poll_table_struct *wait) | |
785 | { | |
786 | struct btaudio *bta = file->private_data; | |
787 | unsigned int mask = 0; | |
788 | ||
789 | poll_wait(file, &bta->readq, wait); | |
790 | ||
791 | if (0 != bta->read_count) | |
792 | mask |= (POLLIN | POLLRDNORM); | |
793 | ||
794 | return mask; | |
795 | } | |
796 | ||
797 | static struct file_operations btaudio_digital_dsp_fops = { | |
798 | .owner = THIS_MODULE, | |
799 | .llseek = no_llseek, | |
800 | .open = btaudio_dsp_open_digital, | |
801 | .release = btaudio_dsp_release, | |
802 | .read = btaudio_dsp_read, | |
803 | .write = btaudio_dsp_write, | |
804 | .ioctl = btaudio_dsp_ioctl, | |
805 | .poll = btaudio_dsp_poll, | |
806 | }; | |
807 | ||
808 | static struct file_operations btaudio_analog_dsp_fops = { | |
809 | .owner = THIS_MODULE, | |
810 | .llseek = no_llseek, | |
811 | .open = btaudio_dsp_open_analog, | |
812 | .release = btaudio_dsp_release, | |
813 | .read = btaudio_dsp_read, | |
814 | .write = btaudio_dsp_write, | |
815 | .ioctl = btaudio_dsp_ioctl, | |
816 | .poll = btaudio_dsp_poll, | |
817 | }; | |
818 | ||
819 | /* -------------------------------------------------------------- */ | |
820 | ||
821 | static char *irq_name[] = { "", "", "", "OFLOW", "", "", "", "", "", "", "", | |
822 | "RISCI", "FBUS", "FTRGT", "FDSR", "PPERR", | |
823 | "RIPERR", "PABORT", "OCERR", "SCERR" }; | |
824 | ||
825 | static irqreturn_t btaudio_irq(int irq, void *dev_id, struct pt_regs * regs) | |
826 | { | |
827 | int count = 0; | |
828 | u32 stat,astat; | |
829 | struct btaudio *bta = dev_id; | |
830 | int handled = 0; | |
831 | ||
832 | for (;;) { | |
833 | count++; | |
834 | stat = btread(REG_INT_STAT); | |
835 | astat = stat & btread(REG_INT_MASK); | |
836 | if (!astat) | |
837 | return IRQ_RETVAL(handled); | |
838 | handled = 1; | |
839 | btwrite(astat,REG_INT_STAT); | |
840 | ||
841 | if (irq_debug) { | |
842 | int i; | |
843 | printk(KERN_DEBUG "btaudio: irq loop=%d risc=%x, bits:", | |
844 | count, stat>>28); | |
845 | for (i = 0; i < (sizeof(irq_name)/sizeof(char*)); i++) { | |
846 | if (stat & (1 << i)) | |
847 | printk(" %s",irq_name[i]); | |
848 | if (astat & (1 << i)) | |
849 | printk("*"); | |
850 | } | |
851 | printk("\n"); | |
852 | } | |
853 | if (stat & IRQ_RISCI) { | |
854 | int blocks; | |
855 | blocks = (stat >> 28) - bta->dma_block; | |
856 | if (blocks < 0) | |
857 | blocks += bta->block_count; | |
858 | bta->dma_block = stat >> 28; | |
859 | if (bta->read_count + 2*bta->block_bytes > bta->buf_size) { | |
860 | stop_recording(bta); | |
861 | printk(KERN_INFO "btaudio: buffer overrun\n"); | |
862 | } | |
863 | if (blocks > 0) { | |
864 | bta->read_count += blocks * bta->block_bytes; | |
865 | wake_up_interruptible(&bta->readq); | |
866 | } | |
867 | } | |
868 | if (count > 10) { | |
869 | printk(KERN_WARNING | |
870 | "btaudio: Oops - irq mask cleared\n"); | |
871 | btwrite(0, REG_INT_MASK); | |
872 | } | |
873 | } | |
874 | return IRQ_NONE; | |
875 | } | |
876 | ||
877 | /* -------------------------------------------------------------- */ | |
878 | ||
879 | static unsigned int dsp1 = -1; | |
880 | static unsigned int dsp2 = -1; | |
881 | static unsigned int mixer = -1; | |
882 | static int latency = -1; | |
883 | static int digital = 1; | |
884 | static int analog = 1; | |
885 | static int rate; | |
886 | ||
887 | #define BTA_OSPREY200 1 | |
888 | ||
889 | static struct cardinfo cards[] = { | |
890 | [0] = { | |
891 | .name = "default", | |
892 | .rate = 32000, | |
893 | }, | |
894 | [BTA_OSPREY200] = { | |
895 | .name = "Osprey 200", | |
896 | .rate = 44100, | |
897 | }, | |
898 | }; | |
899 | ||
900 | static int __devinit btaudio_probe(struct pci_dev *pci_dev, | |
901 | const struct pci_device_id *pci_id) | |
902 | { | |
903 | struct btaudio *bta; | |
904 | struct cardinfo *card = &cards[pci_id->driver_data]; | |
905 | unsigned char revision,lat; | |
906 | int rc = -EBUSY; | |
907 | ||
908 | if (pci_enable_device(pci_dev)) | |
909 | return -EIO; | |
910 | if (!request_mem_region(pci_resource_start(pci_dev,0), | |
911 | pci_resource_len(pci_dev,0), | |
912 | "btaudio")) { | |
913 | return -EBUSY; | |
914 | } | |
915 | ||
916 | bta = kmalloc(sizeof(*bta),GFP_ATOMIC); | |
917 | if (!bta) { | |
918 | rc = -ENOMEM; | |
919 | goto fail0; | |
920 | } | |
921 | memset(bta,0,sizeof(*bta)); | |
922 | ||
923 | bta->pci = pci_dev; | |
924 | bta->irq = pci_dev->irq; | |
925 | bta->mem = pci_resource_start(pci_dev,0); | |
926 | bta->mmio = ioremap(pci_resource_start(pci_dev,0), | |
927 | pci_resource_len(pci_dev,0)); | |
928 | ||
929 | bta->source = 1; | |
930 | bta->bits = 8; | |
931 | bta->channels = 1; | |
932 | if (bta->analog) { | |
933 | bta->decimation = 15; | |
934 | } else { | |
935 | bta->decimation = 0; | |
936 | bta->sampleshift = 1; | |
937 | } | |
938 | ||
939 | /* sample rate */ | |
940 | bta->rate = card->rate; | |
941 | if (rate) | |
942 | bta->rate = rate; | |
943 | ||
944 | init_MUTEX(&bta->lock); | |
945 | init_waitqueue_head(&bta->readq); | |
946 | ||
947 | if (-1 != latency) { | |
948 | printk(KERN_INFO "btaudio: setting pci latency timer to %d\n", | |
949 | latency); | |
950 | pci_write_config_byte(pci_dev, PCI_LATENCY_TIMER, latency); | |
951 | } | |
952 | pci_read_config_byte(pci_dev, PCI_CLASS_REVISION, &revision); | |
953 | pci_read_config_byte(pci_dev, PCI_LATENCY_TIMER, &lat); | |
954 | printk(KERN_INFO "btaudio: Bt%x (rev %d) at %02x:%02x.%x, ", | |
955 | pci_dev->device,revision,pci_dev->bus->number, | |
956 | PCI_SLOT(pci_dev->devfn),PCI_FUNC(pci_dev->devfn)); | |
957 | printk("irq: %d, latency: %d, mmio: 0x%lx\n", | |
958 | bta->irq, lat, bta->mem); | |
959 | printk("btaudio: using card config \"%s\"\n", card->name); | |
960 | ||
961 | /* init hw */ | |
962 | btwrite(0, REG_GPIO_DMA_CTL); | |
963 | btwrite(0, REG_INT_MASK); | |
964 | btwrite(~0U, REG_INT_STAT); | |
965 | pci_set_master(pci_dev); | |
966 | ||
967 | if ((rc = request_irq(bta->irq, btaudio_irq, SA_SHIRQ|SA_INTERRUPT, | |
968 | "btaudio",(void *)bta)) < 0) { | |
969 | printk(KERN_WARNING | |
970 | "btaudio: can't request irq (rc=%d)\n",rc); | |
971 | goto fail1; | |
972 | } | |
973 | ||
974 | /* register devices */ | |
975 | if (digital) { | |
976 | rc = bta->dsp_digital = | |
977 | register_sound_dsp(&btaudio_digital_dsp_fops,dsp1); | |
978 | if (rc < 0) { | |
979 | printk(KERN_WARNING | |
980 | "btaudio: can't register digital dsp (rc=%d)\n",rc); | |
981 | goto fail2; | |
982 | } | |
983 | printk(KERN_INFO "btaudio: registered device dsp%d [digital]\n", | |
984 | bta->dsp_digital >> 4); | |
985 | } | |
986 | if (analog) { | |
987 | rc = bta->dsp_analog = | |
988 | register_sound_dsp(&btaudio_analog_dsp_fops,dsp2); | |
989 | if (rc < 0) { | |
990 | printk(KERN_WARNING | |
991 | "btaudio: can't register analog dsp (rc=%d)\n",rc); | |
992 | goto fail3; | |
993 | } | |
994 | printk(KERN_INFO "btaudio: registered device dsp%d [analog]\n", | |
995 | bta->dsp_analog >> 4); | |
996 | rc = bta->mixer_dev = register_sound_mixer(&btaudio_mixer_fops,mixer); | |
997 | if (rc < 0) { | |
998 | printk(KERN_WARNING | |
999 | "btaudio: can't register mixer (rc=%d)\n",rc); | |
1000 | goto fail4; | |
1001 | } | |
1002 | printk(KERN_INFO "btaudio: registered device mixer%d\n", | |
1003 | bta->mixer_dev >> 4); | |
1004 | } | |
1005 | ||
1006 | /* hook into linked list */ | |
1007 | bta->next = btaudios; | |
1008 | btaudios = bta; | |
1009 | ||
1010 | pci_set_drvdata(pci_dev,bta); | |
1011 | return 0; | |
1012 | ||
1013 | fail4: | |
1014 | unregister_sound_dsp(bta->dsp_analog); | |
1015 | fail3: | |
1016 | if (digital) | |
1017 | unregister_sound_dsp(bta->dsp_digital); | |
1018 | fail2: | |
1019 | free_irq(bta->irq,bta); | |
1020 | fail1: | |
1021 | kfree(bta); | |
1022 | fail0: | |
1023 | release_mem_region(pci_resource_start(pci_dev,0), | |
1024 | pci_resource_len(pci_dev,0)); | |
1025 | return rc; | |
1026 | } | |
1027 | ||
1028 | static void __devexit btaudio_remove(struct pci_dev *pci_dev) | |
1029 | { | |
1030 | struct btaudio *bta = pci_get_drvdata(pci_dev); | |
1031 | struct btaudio *walk; | |
1032 | ||
1033 | /* turn off all DMA / IRQs */ | |
1034 | btand(~15, REG_GPIO_DMA_CTL); | |
1035 | btwrite(0, REG_INT_MASK); | |
1036 | btwrite(~0U, REG_INT_STAT); | |
1037 | ||
1038 | /* unregister devices */ | |
1039 | if (digital) { | |
1040 | unregister_sound_dsp(bta->dsp_digital); | |
1041 | } | |
1042 | if (analog) { | |
1043 | unregister_sound_dsp(bta->dsp_analog); | |
1044 | unregister_sound_mixer(bta->mixer_dev); | |
1045 | } | |
1046 | ||
1047 | /* free resources */ | |
1048 | free_buffer(bta); | |
1049 | free_irq(bta->irq,bta); | |
1050 | release_mem_region(pci_resource_start(pci_dev,0), | |
1051 | pci_resource_len(pci_dev,0)); | |
1052 | ||
1053 | /* remove from linked list */ | |
1054 | if (bta == btaudios) { | |
1055 | btaudios = NULL; | |
1056 | } else { | |
1057 | for (walk = btaudios; walk->next != bta; walk = walk->next) | |
1058 | ; /* if (NULL == walk->next) BUG(); */ | |
1059 | walk->next = bta->next; | |
1060 | } | |
1061 | ||
1062 | pci_set_drvdata(pci_dev, NULL); | |
1063 | kfree(bta); | |
1064 | return; | |
1065 | } | |
1066 | ||
1067 | /* -------------------------------------------------------------- */ | |
1068 | ||
1069 | static struct pci_device_id btaudio_pci_tbl[] = { | |
1070 | { | |
1071 | .vendor = PCI_VENDOR_ID_BROOKTREE, | |
1072 | .device = 0x0878, | |
1073 | .subvendor = 0x0070, | |
1074 | .subdevice = 0xff01, | |
1075 | .driver_data = BTA_OSPREY200, | |
1076 | },{ | |
1077 | .vendor = PCI_VENDOR_ID_BROOKTREE, | |
1078 | .device = 0x0878, | |
1079 | .subvendor = PCI_ANY_ID, | |
1080 | .subdevice = PCI_ANY_ID, | |
1081 | },{ | |
1082 | .vendor = PCI_VENDOR_ID_BROOKTREE, | |
1083 | .device = 0x0878, | |
1084 | .subvendor = PCI_ANY_ID, | |
1085 | .subdevice = PCI_ANY_ID, | |
1086 | },{ | |
1087 | /* --- end of list --- */ | |
1088 | } | |
1089 | }; | |
1090 | ||
1091 | static struct pci_driver btaudio_pci_driver = { | |
1092 | .name = "btaudio", | |
1093 | .id_table = btaudio_pci_tbl, | |
1094 | .probe = btaudio_probe, | |
1095 | .remove = __devexit_p(btaudio_remove), | |
1096 | }; | |
1097 | ||
1098 | static int btaudio_init_module(void) | |
1099 | { | |
1100 | printk(KERN_INFO "btaudio: driver version 0.7 loaded [%s%s%s]\n", | |
1101 | digital ? "digital" : "", | |
1102 | analog && digital ? "+" : "", | |
1103 | analog ? "analog" : ""); | |
1104 | return pci_module_init(&btaudio_pci_driver); | |
1105 | } | |
1106 | ||
1107 | static void btaudio_cleanup_module(void) | |
1108 | { | |
1109 | pci_unregister_driver(&btaudio_pci_driver); | |
1110 | return; | |
1111 | } | |
1112 | ||
1113 | module_init(btaudio_init_module); | |
1114 | module_exit(btaudio_cleanup_module); | |
1115 | ||
1116 | module_param(dsp1, int, S_IRUGO); | |
1117 | module_param(dsp2, int, S_IRUGO); | |
1118 | module_param(mixer, int, S_IRUGO); | |
1119 | module_param(debug, int, S_IRUGO | S_IWUSR); | |
1120 | module_param(irq_debug, int, S_IRUGO | S_IWUSR); | |
1121 | module_param(digital, int, S_IRUGO); | |
1122 | module_param(analog, int, S_IRUGO); | |
1123 | module_param(rate, int, S_IRUGO); | |
1124 | module_param(latency, int, S_IRUGO); | |
1125 | MODULE_PARM_DESC(latency,"pci latency timer"); | |
1126 | ||
1127 | MODULE_DEVICE_TABLE(pci, btaudio_pci_tbl); | |
1128 | MODULE_DESCRIPTION("bt878 audio dma driver"); | |
1129 | MODULE_AUTHOR("Gerd Knorr"); | |
1130 | MODULE_LICENSE("GPL"); | |
1131 | ||
1132 | /* | |
1133 | * Local variables: | |
1134 | * c-basic-offset: 8 | |
1135 | * End: | |
1136 | */ |