xref: /linux/sound/pci/ca0106/ca0106_main.c (revision 9ce7677cfd7cd871adb457c80bea3b581b839641)
1 /*
2  *  Copyright (c) 2004 James Courtier-Dutton <James@superbug.demon.co.uk>
3  *  Driver CA0106 chips. e.g. Sound Blaster Audigy LS and Live 24bit
4  *  Version: 0.0.23
5  *
6  *  FEATURES currently supported:
7  *    Front, Rear and Center/LFE.
8  *    Surround40 and Surround51.
9  *    Capture from MIC an LINE IN input.
10  *    SPDIF digital playback of PCM stereo and AC3/DTS works.
11  *    (One can use a standard mono mini-jack to one RCA plugs cable.
12  *     or one can use a standard stereo mini-jack to two RCA plugs cable.
13  *     Plug one of the RCA plugs into the Coax input of the external decoder/receiver.)
14  *    ( In theory one could output 3 different AC3 streams at once, to 3 different SPDIF outputs. )
15  *    Notes on how to capture sound:
16  *      The AC97 is used in the PLAYBACK direction.
17  *      The output from the AC97 chip, instead of reaching the speakers, is fed into the Philips 1361T ADC.
18  *      So, to record from the MIC, set the MIC Playback volume to max,
19  *      unmute the MIC and turn up the MASTER Playback volume.
20  *      So, to prevent feedback when capturing, minimise the "Capture feedback into Playback" volume.
21  *
22  *    The only playback controls that currently do anything are: -
23  *    Analog Front
24  *    Analog Rear
25  *    Analog Center/LFE
26  *    SPDIF Front
27  *    SPDIF Rear
28  *    SPDIF Center/LFE
29  *
30  *    For capture from Mic in or Line in.
31  *    Digital/Analog ( switch must be in Analog mode for CAPTURE. )
32  *
33  *    CAPTURE feedback into PLAYBACK
34  *
35  *  Changelog:
36  *    Support interrupts per period.
37  *    Removed noise from Center/LFE channel when in Analog mode.
38  *    Rename and remove mixer controls.
39  *  0.0.6
40  *    Use separate card based DMA buffer for periods table list.
41  *  0.0.7
42  *    Change remove and rename ctrls into lists.
43  *  0.0.8
44  *    Try to fix capture sources.
45  *  0.0.9
46  *    Fix AC3 output.
47  *    Enable S32_LE format support.
48  *  0.0.10
49  *    Enable playback 48000 and 96000 rates. (Rates other that these do not work, even with "plug:front".)
50  *  0.0.11
51  *    Add Model name recognition.
52  *  0.0.12
53  *    Correct interrupt timing. interrupt at end of period, instead of in the middle of a playback period.
54  *    Remove redundent "voice" handling.
55  *  0.0.13
56  *    Single trigger call for multi channels.
57  *  0.0.14
58  *    Set limits based on what the sound card hardware can do.
59  *    playback periods_min=2, periods_max=8
60  *    capture hw constraints require period_size = n * 64 bytes.
61  *    playback hw constraints require period_size = n * 64 bytes.
62  *  0.0.15
63  *    Minor updates.
64  *  0.0.16
65  *    Implement 192000 sample rate.
66  *  0.0.17
67  *    Add support for SB0410 and SB0413.
68  *  0.0.18
69  *    Modified Copyright message.
70  *  0.0.19
71  *    Finally fix support for SB Live 24 bit. SB0410 and SB0413.
72  *    The output codec needs resetting, otherwise all output is muted.
73  *  0.0.20
74  *    Merge "pci_disable_device(pci);" fixes.
75  *  0.0.21
76  *    Add 4 capture channels. (SPDIF only comes in on channel 0. )
77  *    Add SPDIF capture using optional digital I/O module for SB Live 24bit. (Analog capture does not yet work.)
78  *  0.0.22
79  *    Add support for MSI K8N Diamond Motherboard with onboard SB Live 24bit without AC97. From kiksen, bug #901
80  *  0.0.23
81  *    Implement support for Line-in capture on SB Live 24bit.
82  *
83  *  BUGS:
84  *    Some stability problems when unloading the snd-ca0106 kernel module.
85  *    --
86  *
87  *  TODO:
88  *    4 Capture channels, only one implemented so far.
89  *    Other capture rates apart from 48khz not implemented.
90  *    MIDI
91  *    --
92  *  GENERAL INFO:
93  *    Model: SB0310
94  *    P17 Chip: CA0106-DAT
95  *    AC97 Codec: STAC 9721
96  *    ADC: Philips 1361T (Stereo 24bit)
97  *    DAC: WM8746EDS (6-channel, 24bit, 192Khz)
98  *
99  *  GENERAL INFO:
100  *    Model: SB0410
101  *    P17 Chip: CA0106-DAT
102  *    AC97 Codec: None
103  *    ADC: WM8775EDS (4 Channel)
104  *    DAC: CS4382 (114 dB, 24-Bit, 192 kHz, 8-Channel D/A Converter with DSD Support)
105  *    SPDIF Out control switches between Mic in and SPDIF out.
106  *    No sound out or mic input working yet.
107  *
108  *  GENERAL INFO:
109  *    Model: SB0413
110  *    P17 Chip: CA0106-DAT
111  *    AC97 Codec: None.
112  *    ADC: Unknown
113  *    DAC: Unknown
114  *    Trying to handle it like the SB0410.
115  *
116  *  This code was initally based on code from ALSA's emu10k1x.c which is:
117  *  Copyright (c) by Francisco Moraes <fmoraes@nc.rr.com>
118  *
119  *   This program is free software; you can redistribute it and/or modify
120  *   it under the terms of the GNU General Public License as published by
121  *   the Free Software Foundation; either version 2 of the License, or
122  *   (at your option) any later version.
123  *
124  *   This program is distributed in the hope that it will be useful,
125  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
126  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
127  *   GNU General Public License for more details.
128  *
129  *   You should have received a copy of the GNU General Public License
130  *   along with this program; if not, write to the Free Software
131  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
132  *
133  */
134 #include <sound/driver.h>
135 #include <linux/delay.h>
136 #include <linux/init.h>
137 #include <linux/interrupt.h>
138 #include <linux/pci.h>
139 #include <linux/slab.h>
140 #include <linux/moduleparam.h>
141 #include <linux/dma-mapping.h>
142 #include <sound/core.h>
143 #include <sound/initval.h>
144 #include <sound/pcm.h>
145 #include <sound/ac97_codec.h>
146 #include <sound/info.h>
147 
148 MODULE_AUTHOR("James Courtier-Dutton <James@superbug.demon.co.uk>");
149 MODULE_DESCRIPTION("CA0106");
150 MODULE_LICENSE("GPL");
151 MODULE_SUPPORTED_DEVICE("{{Creative,SB CA0106 chip}}");
152 
153 // module parameters (see "Module Parameters")
154 static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;
155 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;
156 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;
157 
158 module_param_array(index, int, NULL, 0444);
159 MODULE_PARM_DESC(index, "Index value for the CA0106 soundcard.");
160 module_param_array(id, charp, NULL, 0444);
161 MODULE_PARM_DESC(id, "ID string for the CA0106 soundcard.");
162 module_param_array(enable, bool, NULL, 0444);
163 MODULE_PARM_DESC(enable, "Enable the CA0106 soundcard.");
164 
165 #include "ca0106.h"
166 
167 static ca0106_details_t ca0106_chip_details[] = {
168 	 /* AudigyLS[SB0310] */
169 	 { .serial = 0x10021102,
170 	   .name   = "AudigyLS [SB0310]",
171 	   .ac97   = 1 } ,
172 	 /* Unknown AudigyLS that also says SB0310 on it */
173 	 { .serial = 0x10051102,
174 	   .name   = "AudigyLS [SB0310b]",
175 	   .ac97   = 1 } ,
176 	 /* New Sound Blaster Live! 7.1 24bit. This does not have an AC97. 53SB041000001 */
177 	 { .serial = 0x10061102,
178 	   .name   = "Live! 7.1 24bit [SB0410]",
179 	   .gpio_type = 1,
180 	   .i2c_adc = 1 } ,
181 	 /* New Dell Sound Blaster Live! 7.1 24bit. This does not have an AC97.  */
182 	 { .serial = 0x10071102,
183 	   .name   = "Live! 7.1 24bit [SB0413]",
184 	   .gpio_type = 1,
185 	   .i2c_adc = 1 } ,
186 	 /* MSI K8N Diamond Motherboard with onboard SB Live 24bit without AC97 */
187 	 { .serial = 0x10091462,
188 	   .name   = "MSI K8N Diamond MB [SB0438]",
189 	   .gpio_type = 1,
190 	   .i2c_adc = 1 } ,
191 	 /* Shuttle XPC SD31P which has an onboard Creative Labs Sound Blaster Live! 24-bit EAX
192 	  * high-definition 7.1 audio processor".
193 	  * Added using info from andrewvegan in alsa bug #1298
194 	  */
195 	 { .serial = 0x30381297,
196 	   .name   = "Shuttle XPC SD31P [SD31P]",
197 	   .gpio_type = 1,
198 	   .i2c_adc = 1 } ,
199 	 { .serial = 0,
200 	   .name   = "AudigyLS [Unknown]" }
201 };
202 
203 /* hardware definition */
204 static snd_pcm_hardware_t snd_ca0106_playback_hw = {
205 	.info =			(SNDRV_PCM_INFO_MMAP |
206 				 SNDRV_PCM_INFO_INTERLEAVED |
207 				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
208 				 SNDRV_PCM_INFO_MMAP_VALID),
209 	.formats =		SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
210 	.rates =		SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_192000,
211 	.rate_min =		48000,
212 	.rate_max =		192000,
213 	.channels_min =		2,  //1,
214 	.channels_max =		2,  //6,
215 	.buffer_bytes_max =	((65536 - 64) * 8),
216 	.period_bytes_min =	64,
217 	.period_bytes_max =	(65536 - 64),
218 	.periods_min =		2,
219 	.periods_max =		8,
220 	.fifo_size =		0,
221 };
222 
223 static snd_pcm_hardware_t snd_ca0106_capture_hw = {
224 	.info =			(SNDRV_PCM_INFO_MMAP |
225 				 SNDRV_PCM_INFO_INTERLEAVED |
226 				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
227 				 SNDRV_PCM_INFO_MMAP_VALID),
228 	.formats =		SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
229 	.rates =		SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_192000,
230 	.rate_min =		44100,
231 	.rate_max =		192000,
232 	.channels_min =		2,
233 	.channels_max =		2,
234 	.buffer_bytes_max =	((65536 - 64) * 8),
235 	.period_bytes_min =	64,
236 	.period_bytes_max =	(65536 - 64),
237 	.periods_min =		2,
238 	.periods_max =		2,
239 	.fifo_size =		0,
240 };
241 
242 unsigned int snd_ca0106_ptr_read(ca0106_t * emu,
243 					  unsigned int reg,
244 					  unsigned int chn)
245 {
246 	unsigned long flags;
247 	unsigned int regptr, val;
248 
249 	regptr = (reg << 16) | chn;
250 
251 	spin_lock_irqsave(&emu->emu_lock, flags);
252 	outl(regptr, emu->port + PTR);
253 	val = inl(emu->port + DATA);
254 	spin_unlock_irqrestore(&emu->emu_lock, flags);
255 	return val;
256 }
257 
258 void snd_ca0106_ptr_write(ca0106_t *emu,
259 				   unsigned int reg,
260 				   unsigned int chn,
261 				   unsigned int data)
262 {
263 	unsigned int regptr;
264 	unsigned long flags;
265 
266 	regptr = (reg << 16) | chn;
267 
268 	spin_lock_irqsave(&emu->emu_lock, flags);
269 	outl(regptr, emu->port + PTR);
270 	outl(data, emu->port + DATA);
271 	spin_unlock_irqrestore(&emu->emu_lock, flags);
272 }
273 
274 int snd_ca0106_i2c_write(ca0106_t *emu,
275 				u32 reg,
276 				u32 value)
277 {
278 	u32 tmp;
279 	int timeout=0;
280 	int status;
281 	int retry;
282 	if ((reg > 0x7f) || (value > 0x1ff))
283 	{
284 		snd_printk(KERN_ERR "i2c_write: invalid values.\n");
285 		return -EINVAL;
286 	}
287 
288 	tmp = reg << 25 | value << 16;
289 	/* Not sure what this I2C channel controls. */
290 	/* snd_ca0106_ptr_write(emu, I2C_D0, 0, tmp); */
291 
292 	/* This controls the I2C connected to the WM8775 ADC Codec */
293 	snd_ca0106_ptr_write(emu, I2C_D1, 0, tmp);
294 
295 	for(retry=0;retry<10;retry++)
296 	{
297 		/* Send the data to i2c */
298 		tmp = snd_ca0106_ptr_read(emu, I2C_A, 0);
299 		tmp = tmp & ~(I2C_A_ADC_READ|I2C_A_ADC_LAST|I2C_A_ADC_START|I2C_A_ADC_ADD_MASK);
300 		tmp = tmp | (I2C_A_ADC_LAST|I2C_A_ADC_START|I2C_A_ADC_ADD);
301 		snd_ca0106_ptr_write(emu, I2C_A, 0, tmp);
302 
303 		/* Wait till the transaction ends */
304 		while(1)
305 		{
306 			status = snd_ca0106_ptr_read(emu, I2C_A, 0);
307                 	//snd_printk("I2C:status=0x%x\n", status);
308 			timeout++;
309 			if((status & I2C_A_ADC_START)==0)
310 				break;
311 
312 			if(timeout>1000)
313 				break;
314 		}
315 		//Read back and see if the transaction is successful
316 		if((status & I2C_A_ADC_ABORT)==0)
317 			break;
318 	}
319 
320 	if(retry==10)
321 	{
322 		snd_printk(KERN_ERR "Writing to ADC failed!\n");
323 		return -EINVAL;
324 	}
325 
326     	return 0;
327 }
328 
329 
330 static void snd_ca0106_intr_enable(ca0106_t *emu, unsigned int intrenb)
331 {
332 	unsigned long flags;
333 	unsigned int enable;
334 
335 	spin_lock_irqsave(&emu->emu_lock, flags);
336 	enable = inl(emu->port + INTE) | intrenb;
337 	outl(enable, emu->port + INTE);
338 	spin_unlock_irqrestore(&emu->emu_lock, flags);
339 }
340 
341 static void snd_ca0106_intr_disable(ca0106_t *emu, unsigned int intrenb)
342 {
343 	unsigned long flags;
344 	unsigned int enable;
345 
346 	spin_lock_irqsave(&emu->emu_lock, flags);
347 	enable = inl(emu->port + INTE) & ~intrenb;
348 	outl(enable, emu->port + INTE);
349 	spin_unlock_irqrestore(&emu->emu_lock, flags);
350 }
351 
352 
353 static void snd_ca0106_pcm_free_substream(snd_pcm_runtime_t *runtime)
354 {
355 	kfree(runtime->private_data);
356 }
357 
358 /* open_playback callback */
359 static int snd_ca0106_pcm_open_playback_channel(snd_pcm_substream_t *substream, int channel_id)
360 {
361 	ca0106_t *chip = snd_pcm_substream_chip(substream);
362         ca0106_channel_t *channel = &(chip->playback_channels[channel_id]);
363 	ca0106_pcm_t *epcm;
364 	snd_pcm_runtime_t *runtime = substream->runtime;
365 	int err;
366 
367 	epcm = kzalloc(sizeof(*epcm), GFP_KERNEL);
368 
369 	if (epcm == NULL)
370 		return -ENOMEM;
371 	epcm->emu = chip;
372 	epcm->substream = substream;
373         epcm->channel_id=channel_id;
374 
375 	runtime->private_data = epcm;
376 	runtime->private_free = snd_ca0106_pcm_free_substream;
377 
378 	runtime->hw = snd_ca0106_playback_hw;
379 
380         channel->emu = chip;
381         channel->number = channel_id;
382 
383         channel->use=1;
384         //printk("open:channel_id=%d, chip=%p, channel=%p\n",channel_id, chip, channel);
385         //channel->interrupt = snd_ca0106_pcm_channel_interrupt;
386         channel->epcm=epcm;
387 	if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
388                 return err;
389 	if ((err = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 64)) < 0)
390                 return err;
391 	return 0;
392 }
393 
394 /* close callback */
395 static int snd_ca0106_pcm_close_playback(snd_pcm_substream_t *substream)
396 {
397 	ca0106_t *chip = snd_pcm_substream_chip(substream);
398 	snd_pcm_runtime_t *runtime = substream->runtime;
399         ca0106_pcm_t *epcm = runtime->private_data;
400         chip->playback_channels[epcm->channel_id].use=0;
401 /* FIXME: maybe zero others */
402 	return 0;
403 }
404 
405 static int snd_ca0106_pcm_open_playback_front(snd_pcm_substream_t *substream)
406 {
407 	return snd_ca0106_pcm_open_playback_channel(substream, PCM_FRONT_CHANNEL);
408 }
409 
410 static int snd_ca0106_pcm_open_playback_center_lfe(snd_pcm_substream_t *substream)
411 {
412 	return snd_ca0106_pcm_open_playback_channel(substream, PCM_CENTER_LFE_CHANNEL);
413 }
414 
415 static int snd_ca0106_pcm_open_playback_unknown(snd_pcm_substream_t *substream)
416 {
417 	return snd_ca0106_pcm_open_playback_channel(substream, PCM_UNKNOWN_CHANNEL);
418 }
419 
420 static int snd_ca0106_pcm_open_playback_rear(snd_pcm_substream_t *substream)
421 {
422 	return snd_ca0106_pcm_open_playback_channel(substream, PCM_REAR_CHANNEL);
423 }
424 
425 /* open_capture callback */
426 static int snd_ca0106_pcm_open_capture_channel(snd_pcm_substream_t *substream, int channel_id)
427 {
428 	ca0106_t *chip = snd_pcm_substream_chip(substream);
429         ca0106_channel_t *channel = &(chip->capture_channels[channel_id]);
430 	ca0106_pcm_t *epcm;
431 	snd_pcm_runtime_t *runtime = substream->runtime;
432 	int err;
433 
434 	epcm = kzalloc(sizeof(*epcm), GFP_KERNEL);
435 	if (epcm == NULL) {
436 		snd_printk(KERN_ERR "open_capture_channel: failed epcm alloc\n");
437 		return -ENOMEM;
438         }
439 	epcm->emu = chip;
440 	epcm->substream = substream;
441         epcm->channel_id=channel_id;
442 
443 	runtime->private_data = epcm;
444 	runtime->private_free = snd_ca0106_pcm_free_substream;
445 
446 	runtime->hw = snd_ca0106_capture_hw;
447 
448         channel->emu = chip;
449         channel->number = channel_id;
450 
451         channel->use=1;
452         //printk("open:channel_id=%d, chip=%p, channel=%p\n",channel_id, chip, channel);
453         //channel->interrupt = snd_ca0106_pcm_channel_interrupt;
454         channel->epcm=epcm;
455 	if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
456                 return err;
457 	//snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, &hw_constraints_capture_period_sizes);
458 	if ((err = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 64)) < 0)
459                 return err;
460 	return 0;
461 }
462 
463 /* close callback */
464 static int snd_ca0106_pcm_close_capture(snd_pcm_substream_t *substream)
465 {
466 	ca0106_t *chip = snd_pcm_substream_chip(substream);
467 	snd_pcm_runtime_t *runtime = substream->runtime;
468         ca0106_pcm_t *epcm = runtime->private_data;
469         chip->capture_channels[epcm->channel_id].use=0;
470 /* FIXME: maybe zero others */
471 	return 0;
472 }
473 
474 static int snd_ca0106_pcm_open_0_capture(snd_pcm_substream_t *substream)
475 {
476 	return snd_ca0106_pcm_open_capture_channel(substream, 0);
477 }
478 
479 static int snd_ca0106_pcm_open_1_capture(snd_pcm_substream_t *substream)
480 {
481 	return snd_ca0106_pcm_open_capture_channel(substream, 1);
482 }
483 
484 static int snd_ca0106_pcm_open_2_capture(snd_pcm_substream_t *substream)
485 {
486 	return snd_ca0106_pcm_open_capture_channel(substream, 2);
487 }
488 
489 static int snd_ca0106_pcm_open_3_capture(snd_pcm_substream_t *substream)
490 {
491 	return snd_ca0106_pcm_open_capture_channel(substream, 3);
492 }
493 
494 /* hw_params callback */
495 static int snd_ca0106_pcm_hw_params_playback(snd_pcm_substream_t *substream,
496 				      snd_pcm_hw_params_t * hw_params)
497 {
498 	return snd_pcm_lib_malloc_pages(substream,
499 					params_buffer_bytes(hw_params));
500 }
501 
502 /* hw_free callback */
503 static int snd_ca0106_pcm_hw_free_playback(snd_pcm_substream_t *substream)
504 {
505 	return snd_pcm_lib_free_pages(substream);
506 }
507 
508 /* hw_params callback */
509 static int snd_ca0106_pcm_hw_params_capture(snd_pcm_substream_t *substream,
510 				      snd_pcm_hw_params_t * hw_params)
511 {
512 	return snd_pcm_lib_malloc_pages(substream,
513 					params_buffer_bytes(hw_params));
514 }
515 
516 /* hw_free callback */
517 static int snd_ca0106_pcm_hw_free_capture(snd_pcm_substream_t *substream)
518 {
519 	return snd_pcm_lib_free_pages(substream);
520 }
521 
522 /* prepare playback callback */
523 static int snd_ca0106_pcm_prepare_playback(snd_pcm_substream_t *substream)
524 {
525 	ca0106_t *emu = snd_pcm_substream_chip(substream);
526 	snd_pcm_runtime_t *runtime = substream->runtime;
527 	ca0106_pcm_t *epcm = runtime->private_data;
528 	int channel = epcm->channel_id;
529 	u32 *table_base = (u32 *)(emu->buffer.area+(8*16*channel));
530 	u32 period_size_bytes = frames_to_bytes(runtime, runtime->period_size);
531 	u32 hcfg_mask = HCFG_PLAYBACK_S32_LE;
532 	u32 hcfg_set = 0x00000000;
533 	u32 hcfg;
534 	u32 reg40_mask = 0x30000 << (channel<<1);
535 	u32 reg40_set = 0;
536 	u32 reg40;
537 	/* FIXME: Depending on mixer selection of SPDIF out or not, select the spdif rate or the DAC rate. */
538 	u32 reg71_mask = 0x03030000 ; /* Global. Set SPDIF rate. We only support 44100 to spdif, not to DAC. */
539 	u32 reg71_set = 0;
540 	u32 reg71;
541 	int i;
542 
543         //snd_printk("prepare:channel_number=%d, rate=%d, format=0x%x, channels=%d, buffer_size=%ld, period_size=%ld, periods=%u, frames_to_bytes=%d\n",channel, runtime->rate, runtime->format, runtime->channels, runtime->buffer_size, runtime->period_size, runtime->periods, frames_to_bytes(runtime, 1));
544         //snd_printk("dma_addr=%x, dma_area=%p, table_base=%p\n",runtime->dma_addr, runtime->dma_area, table_base);
545 	//snd_printk("dma_addr=%x, dma_area=%p, dma_bytes(size)=%x\n",emu->buffer.addr, emu->buffer.area, emu->buffer.bytes);
546 	/* Rate can be set per channel. */
547 	/* reg40 control host to fifo */
548 	/* reg71 controls DAC rate. */
549 	switch (runtime->rate) {
550 	case 44100:
551 		reg40_set = 0x10000 << (channel<<1);
552 		reg71_set = 0x01010000;
553 		break;
554         case 48000:
555 		reg40_set = 0;
556 		reg71_set = 0;
557 		break;
558 	case 96000:
559 		reg40_set = 0x20000 << (channel<<1);
560 		reg71_set = 0x02020000;
561 		break;
562 	case 192000:
563 		reg40_set = 0x30000 << (channel<<1);
564 		reg71_set = 0x03030000;
565 		break;
566 	default:
567 		reg40_set = 0;
568 		reg71_set = 0;
569 		break;
570 	}
571 	/* Format is a global setting */
572 	/* FIXME: Only let the first channel accessed set this. */
573 	switch (runtime->format) {
574 	case SNDRV_PCM_FORMAT_S16_LE:
575 		hcfg_set = 0;
576 		break;
577 	case SNDRV_PCM_FORMAT_S32_LE:
578 		hcfg_set = HCFG_PLAYBACK_S32_LE;
579 		break;
580 	default:
581 		hcfg_set = 0;
582 		break;
583 	}
584 	hcfg = inl(emu->port + HCFG) ;
585 	hcfg = (hcfg & ~hcfg_mask) | hcfg_set;
586 	outl(hcfg, emu->port + HCFG);
587 	reg40 = snd_ca0106_ptr_read(emu, 0x40, 0);
588 	reg40 = (reg40 & ~reg40_mask) | reg40_set;
589 	snd_ca0106_ptr_write(emu, 0x40, 0, reg40);
590 	reg71 = snd_ca0106_ptr_read(emu, 0x71, 0);
591 	reg71 = (reg71 & ~reg71_mask) | reg71_set;
592 	snd_ca0106_ptr_write(emu, 0x71, 0, reg71);
593 
594 	/* FIXME: Check emu->buffer.size before actually writing to it. */
595         for(i=0; i < runtime->periods; i++) {
596 		table_base[i*2]=runtime->dma_addr+(i*period_size_bytes);
597 		table_base[(i*2)+1]=period_size_bytes<<16;
598 	}
599 
600 	snd_ca0106_ptr_write(emu, PLAYBACK_LIST_ADDR, channel, emu->buffer.addr+(8*16*channel));
601 	snd_ca0106_ptr_write(emu, PLAYBACK_LIST_SIZE, channel, (runtime->periods - 1) << 19);
602 	snd_ca0106_ptr_write(emu, PLAYBACK_LIST_PTR, channel, 0);
603 	snd_ca0106_ptr_write(emu, PLAYBACK_DMA_ADDR, channel, runtime->dma_addr);
604 	snd_ca0106_ptr_write(emu, PLAYBACK_PERIOD_SIZE, channel, frames_to_bytes(runtime, runtime->period_size)<<16); // buffer size in bytes
605 	/* FIXME  test what 0 bytes does. */
606 	snd_ca0106_ptr_write(emu, PLAYBACK_PERIOD_SIZE, channel, 0); // buffer size in bytes
607 	snd_ca0106_ptr_write(emu, PLAYBACK_POINTER, channel, 0);
608 	snd_ca0106_ptr_write(emu, 0x07, channel, 0x0);
609 	snd_ca0106_ptr_write(emu, 0x08, channel, 0);
610         snd_ca0106_ptr_write(emu, PLAYBACK_MUTE, 0x0, 0x0); /* Unmute output */
611 #if 0
612 	snd_ca0106_ptr_write(emu, SPCS0, 0,
613 			       SPCS_CLKACCY_1000PPM | SPCS_SAMPLERATE_48 |
614 			       SPCS_CHANNELNUM_LEFT | SPCS_SOURCENUM_UNSPEC |
615 			       SPCS_GENERATIONSTATUS | 0x00001200 |
616 			       0x00000000 | SPCS_EMPHASIS_NONE | SPCS_COPYRIGHT );
617 	}
618 #endif
619 
620 	return 0;
621 }
622 
623 /* prepare capture callback */
624 static int snd_ca0106_pcm_prepare_capture(snd_pcm_substream_t *substream)
625 {
626 	ca0106_t *emu = snd_pcm_substream_chip(substream);
627 	snd_pcm_runtime_t *runtime = substream->runtime;
628 	ca0106_pcm_t *epcm = runtime->private_data;
629 	int channel = epcm->channel_id;
630 	u32 hcfg_mask = HCFG_CAPTURE_S32_LE;
631 	u32 hcfg_set = 0x00000000;
632 	u32 hcfg;
633 	u32 over_sampling=0x2;
634 	u32 reg71_mask = 0x0000c000 ; /* Global. Set ADC rate. */
635 	u32 reg71_set = 0;
636 	u32 reg71;
637 
638         //snd_printk("prepare:channel_number=%d, rate=%d, format=0x%x, channels=%d, buffer_size=%ld, period_size=%ld, periods=%u, frames_to_bytes=%d\n",channel, runtime->rate, runtime->format, runtime->channels, runtime->buffer_size, runtime->period_size, runtime->periods, frames_to_bytes(runtime, 1));
639         //snd_printk("dma_addr=%x, dma_area=%p, table_base=%p\n",runtime->dma_addr, runtime->dma_area, table_base);
640 	//snd_printk("dma_addr=%x, dma_area=%p, dma_bytes(size)=%x\n",emu->buffer.addr, emu->buffer.area, emu->buffer.bytes);
641 	/* reg71 controls ADC rate. */
642 	switch (runtime->rate) {
643 	case 44100:
644 		reg71_set = 0x00004000;
645 		break;
646         case 48000:
647 		reg71_set = 0;
648 		break;
649 	case 96000:
650 		reg71_set = 0x00008000;
651 		over_sampling=0xa;
652 		break;
653 	case 192000:
654 		reg71_set = 0x0000c000;
655 		over_sampling=0xa;
656 		break;
657 	default:
658 		reg71_set = 0;
659 		break;
660 	}
661 	/* Format is a global setting */
662 	/* FIXME: Only let the first channel accessed set this. */
663 	switch (runtime->format) {
664 	case SNDRV_PCM_FORMAT_S16_LE:
665 		hcfg_set = 0;
666 		break;
667 	case SNDRV_PCM_FORMAT_S32_LE:
668 		hcfg_set = HCFG_CAPTURE_S32_LE;
669 		break;
670 	default:
671 		hcfg_set = 0;
672 		break;
673 	}
674 	hcfg = inl(emu->port + HCFG) ;
675 	hcfg = (hcfg & ~hcfg_mask) | hcfg_set;
676 	outl(hcfg, emu->port + HCFG);
677 	reg71 = snd_ca0106_ptr_read(emu, 0x71, 0);
678 	reg71 = (reg71 & ~reg71_mask) | reg71_set;
679 	snd_ca0106_ptr_write(emu, 0x71, 0, reg71);
680         if (emu->details->i2c_adc == 1) { /* The SB0410 and SB0413 use I2C to control ADC. */
681 	        snd_ca0106_i2c_write(emu, ADC_MASTER, over_sampling); /* Adjust the over sampler to better suit the capture rate. */
682 	}
683 
684 
685         //printk("prepare:channel_number=%d, rate=%d, format=0x%x, channels=%d, buffer_size=%ld, period_size=%ld, frames_to_bytes=%d\n",channel, runtime->rate, runtime->format, runtime->channels, runtime->buffer_size, runtime->period_size,  frames_to_bytes(runtime, 1));
686 	snd_ca0106_ptr_write(emu, 0x13, channel, 0);
687 	snd_ca0106_ptr_write(emu, CAPTURE_DMA_ADDR, channel, runtime->dma_addr);
688 	snd_ca0106_ptr_write(emu, CAPTURE_BUFFER_SIZE, channel, frames_to_bytes(runtime, runtime->buffer_size)<<16); // buffer size in bytes
689 	snd_ca0106_ptr_write(emu, CAPTURE_POINTER, channel, 0);
690 
691 	return 0;
692 }
693 
694 /* trigger_playback callback */
695 static int snd_ca0106_pcm_trigger_playback(snd_pcm_substream_t *substream,
696 				    int cmd)
697 {
698 	ca0106_t *emu = snd_pcm_substream_chip(substream);
699 	snd_pcm_runtime_t *runtime;
700 	ca0106_pcm_t *epcm;
701 	int channel;
702 	int result = 0;
703 	struct list_head *pos;
704         snd_pcm_substream_t *s;
705 	u32 basic = 0;
706 	u32 extended = 0;
707 	int running=0;
708 
709 	switch (cmd) {
710 	case SNDRV_PCM_TRIGGER_START:
711 		running=1;
712 		break;
713 	case SNDRV_PCM_TRIGGER_STOP:
714 	default:
715 		running=0;
716 		break;
717 	}
718         snd_pcm_group_for_each(pos, substream) {
719                 s = snd_pcm_group_substream_entry(pos);
720 		runtime = s->runtime;
721 		epcm = runtime->private_data;
722 		channel = epcm->channel_id;
723 		//snd_printk("channel=%d\n",channel);
724 		epcm->running = running;
725 		basic |= (0x1<<channel);
726 		extended |= (0x10<<channel);
727                 snd_pcm_trigger_done(s, substream);
728         }
729 	//snd_printk("basic=0x%x, extended=0x%x\n",basic, extended);
730 
731 	switch (cmd) {
732 	case SNDRV_PCM_TRIGGER_START:
733 		snd_ca0106_ptr_write(emu, EXTENDED_INT_MASK, 0, snd_ca0106_ptr_read(emu, EXTENDED_INT_MASK, 0) | (extended));
734 		snd_ca0106_ptr_write(emu, BASIC_INTERRUPT, 0, snd_ca0106_ptr_read(emu, BASIC_INTERRUPT, 0)|(basic));
735 		break;
736 	case SNDRV_PCM_TRIGGER_STOP:
737 		snd_ca0106_ptr_write(emu, BASIC_INTERRUPT, 0, snd_ca0106_ptr_read(emu, BASIC_INTERRUPT, 0) & ~(basic));
738 		snd_ca0106_ptr_write(emu, EXTENDED_INT_MASK, 0, snd_ca0106_ptr_read(emu, EXTENDED_INT_MASK, 0) & ~(extended));
739 		break;
740 	default:
741 		result = -EINVAL;
742 		break;
743 	}
744 	return result;
745 }
746 
747 /* trigger_capture callback */
748 static int snd_ca0106_pcm_trigger_capture(snd_pcm_substream_t *substream,
749 				    int cmd)
750 {
751 	ca0106_t *emu = snd_pcm_substream_chip(substream);
752 	snd_pcm_runtime_t *runtime = substream->runtime;
753 	ca0106_pcm_t *epcm = runtime->private_data;
754 	int channel = epcm->channel_id;
755 	int result = 0;
756 
757 	switch (cmd) {
758 	case SNDRV_PCM_TRIGGER_START:
759 		snd_ca0106_ptr_write(emu, EXTENDED_INT_MASK, 0, snd_ca0106_ptr_read(emu, EXTENDED_INT_MASK, 0) | (0x110000<<channel));
760 		snd_ca0106_ptr_write(emu, BASIC_INTERRUPT, 0, snd_ca0106_ptr_read(emu, BASIC_INTERRUPT, 0)|(0x100<<channel));
761 		epcm->running = 1;
762 		break;
763 	case SNDRV_PCM_TRIGGER_STOP:
764 		snd_ca0106_ptr_write(emu, BASIC_INTERRUPT, 0, snd_ca0106_ptr_read(emu, BASIC_INTERRUPT, 0) & ~(0x100<<channel));
765 		snd_ca0106_ptr_write(emu, EXTENDED_INT_MASK, 0, snd_ca0106_ptr_read(emu, EXTENDED_INT_MASK, 0) & ~(0x110000<<channel));
766 		epcm->running = 0;
767 		break;
768 	default:
769 		result = -EINVAL;
770 		break;
771 	}
772 	return result;
773 }
774 
775 /* pointer_playback callback */
776 static snd_pcm_uframes_t
777 snd_ca0106_pcm_pointer_playback(snd_pcm_substream_t *substream)
778 {
779 	ca0106_t *emu = snd_pcm_substream_chip(substream);
780 	snd_pcm_runtime_t *runtime = substream->runtime;
781 	ca0106_pcm_t *epcm = runtime->private_data;
782 	snd_pcm_uframes_t ptr, ptr1, ptr2,ptr3,ptr4 = 0;
783 	int channel = epcm->channel_id;
784 
785 	if (!epcm->running)
786 		return 0;
787 
788 	ptr3 = snd_ca0106_ptr_read(emu, PLAYBACK_LIST_PTR, channel);
789 	ptr1 = snd_ca0106_ptr_read(emu, PLAYBACK_POINTER, channel);
790 	ptr4 = snd_ca0106_ptr_read(emu, PLAYBACK_LIST_PTR, channel);
791 	if (ptr3 != ptr4) ptr1 = snd_ca0106_ptr_read(emu, PLAYBACK_POINTER, channel);
792 	ptr2 = bytes_to_frames(runtime, ptr1);
793 	ptr2+= (ptr4 >> 3) * runtime->period_size;
794 	ptr=ptr2;
795         if (ptr >= runtime->buffer_size)
796 		ptr -= runtime->buffer_size;
797 	//printk("ptr1 = 0x%lx, ptr2=0x%lx, ptr=0x%lx, buffer_size = 0x%x, period_size = 0x%x, bits=%d, rate=%d\n", ptr1, ptr2, ptr, (int)runtime->buffer_size, (int)runtime->period_size, (int)runtime->frame_bits, (int)runtime->rate);
798 
799 	return ptr;
800 }
801 
802 /* pointer_capture callback */
803 static snd_pcm_uframes_t
804 snd_ca0106_pcm_pointer_capture(snd_pcm_substream_t *substream)
805 {
806 	ca0106_t *emu = snd_pcm_substream_chip(substream);
807 	snd_pcm_runtime_t *runtime = substream->runtime;
808 	ca0106_pcm_t *epcm = runtime->private_data;
809 	snd_pcm_uframes_t ptr, ptr1, ptr2 = 0;
810 	int channel = channel=epcm->channel_id;
811 
812 	if (!epcm->running)
813 		return 0;
814 
815 	ptr1 = snd_ca0106_ptr_read(emu, CAPTURE_POINTER, channel);
816 	ptr2 = bytes_to_frames(runtime, ptr1);
817 	ptr=ptr2;
818         if (ptr >= runtime->buffer_size)
819 		ptr -= runtime->buffer_size;
820 	//printk("ptr1 = 0x%lx, ptr2=0x%lx, ptr=0x%lx, buffer_size = 0x%x, period_size = 0x%x, bits=%d, rate=%d\n", ptr1, ptr2, ptr, (int)runtime->buffer_size, (int)runtime->period_size, (int)runtime->frame_bits, (int)runtime->rate);
821 
822 	return ptr;
823 }
824 
825 /* operators */
826 static snd_pcm_ops_t snd_ca0106_playback_front_ops = {
827 	.open =        snd_ca0106_pcm_open_playback_front,
828 	.close =       snd_ca0106_pcm_close_playback,
829 	.ioctl =       snd_pcm_lib_ioctl,
830 	.hw_params =   snd_ca0106_pcm_hw_params_playback,
831 	.hw_free =     snd_ca0106_pcm_hw_free_playback,
832 	.prepare =     snd_ca0106_pcm_prepare_playback,
833 	.trigger =     snd_ca0106_pcm_trigger_playback,
834 	.pointer =     snd_ca0106_pcm_pointer_playback,
835 };
836 
837 static snd_pcm_ops_t snd_ca0106_capture_0_ops = {
838 	.open =        snd_ca0106_pcm_open_0_capture,
839 	.close =       snd_ca0106_pcm_close_capture,
840 	.ioctl =       snd_pcm_lib_ioctl,
841 	.hw_params =   snd_ca0106_pcm_hw_params_capture,
842 	.hw_free =     snd_ca0106_pcm_hw_free_capture,
843 	.prepare =     snd_ca0106_pcm_prepare_capture,
844 	.trigger =     snd_ca0106_pcm_trigger_capture,
845 	.pointer =     snd_ca0106_pcm_pointer_capture,
846 };
847 
848 static snd_pcm_ops_t snd_ca0106_capture_1_ops = {
849 	.open =        snd_ca0106_pcm_open_1_capture,
850 	.close =       snd_ca0106_pcm_close_capture,
851 	.ioctl =       snd_pcm_lib_ioctl,
852 	.hw_params =   snd_ca0106_pcm_hw_params_capture,
853 	.hw_free =     snd_ca0106_pcm_hw_free_capture,
854 	.prepare =     snd_ca0106_pcm_prepare_capture,
855 	.trigger =     snd_ca0106_pcm_trigger_capture,
856 	.pointer =     snd_ca0106_pcm_pointer_capture,
857 };
858 
859 static snd_pcm_ops_t snd_ca0106_capture_2_ops = {
860 	.open =        snd_ca0106_pcm_open_2_capture,
861 	.close =       snd_ca0106_pcm_close_capture,
862 	.ioctl =       snd_pcm_lib_ioctl,
863 	.hw_params =   snd_ca0106_pcm_hw_params_capture,
864 	.hw_free =     snd_ca0106_pcm_hw_free_capture,
865 	.prepare =     snd_ca0106_pcm_prepare_capture,
866 	.trigger =     snd_ca0106_pcm_trigger_capture,
867 	.pointer =     snd_ca0106_pcm_pointer_capture,
868 };
869 
870 static snd_pcm_ops_t snd_ca0106_capture_3_ops = {
871 	.open =        snd_ca0106_pcm_open_3_capture,
872 	.close =       snd_ca0106_pcm_close_capture,
873 	.ioctl =       snd_pcm_lib_ioctl,
874 	.hw_params =   snd_ca0106_pcm_hw_params_capture,
875 	.hw_free =     snd_ca0106_pcm_hw_free_capture,
876 	.prepare =     snd_ca0106_pcm_prepare_capture,
877 	.trigger =     snd_ca0106_pcm_trigger_capture,
878 	.pointer =     snd_ca0106_pcm_pointer_capture,
879 };
880 
881 static snd_pcm_ops_t snd_ca0106_playback_center_lfe_ops = {
882         .open =         snd_ca0106_pcm_open_playback_center_lfe,
883         .close =        snd_ca0106_pcm_close_playback,
884         .ioctl =        snd_pcm_lib_ioctl,
885         .hw_params =    snd_ca0106_pcm_hw_params_playback,
886         .hw_free =      snd_ca0106_pcm_hw_free_playback,
887         .prepare =      snd_ca0106_pcm_prepare_playback,
888         .trigger =      snd_ca0106_pcm_trigger_playback,
889         .pointer =      snd_ca0106_pcm_pointer_playback,
890 };
891 
892 static snd_pcm_ops_t snd_ca0106_playback_unknown_ops = {
893         .open =         snd_ca0106_pcm_open_playback_unknown,
894         .close =        snd_ca0106_pcm_close_playback,
895         .ioctl =        snd_pcm_lib_ioctl,
896         .hw_params =    snd_ca0106_pcm_hw_params_playback,
897         .hw_free =      snd_ca0106_pcm_hw_free_playback,
898         .prepare =      snd_ca0106_pcm_prepare_playback,
899         .trigger =      snd_ca0106_pcm_trigger_playback,
900         .pointer =      snd_ca0106_pcm_pointer_playback,
901 };
902 
903 static snd_pcm_ops_t snd_ca0106_playback_rear_ops = {
904         .open =         snd_ca0106_pcm_open_playback_rear,
905         .close =        snd_ca0106_pcm_close_playback,
906         .ioctl =        snd_pcm_lib_ioctl,
907         .hw_params =    snd_ca0106_pcm_hw_params_playback,
908 		.hw_free =      snd_ca0106_pcm_hw_free_playback,
909         .prepare =      snd_ca0106_pcm_prepare_playback,
910         .trigger =      snd_ca0106_pcm_trigger_playback,
911         .pointer =      snd_ca0106_pcm_pointer_playback,
912 };
913 
914 
915 static unsigned short snd_ca0106_ac97_read(ac97_t *ac97,
916 					     unsigned short reg)
917 {
918 	ca0106_t *emu = ac97->private_data;
919 	unsigned long flags;
920 	unsigned short val;
921 
922 	spin_lock_irqsave(&emu->emu_lock, flags);
923 	outb(reg, emu->port + AC97ADDRESS);
924 	val = inw(emu->port + AC97DATA);
925 	spin_unlock_irqrestore(&emu->emu_lock, flags);
926 	return val;
927 }
928 
929 static void snd_ca0106_ac97_write(ac97_t *ac97,
930 				    unsigned short reg, unsigned short val)
931 {
932 	ca0106_t *emu = ac97->private_data;
933 	unsigned long flags;
934 
935 	spin_lock_irqsave(&emu->emu_lock, flags);
936 	outb(reg, emu->port + AC97ADDRESS);
937 	outw(val, emu->port + AC97DATA);
938 	spin_unlock_irqrestore(&emu->emu_lock, flags);
939 }
940 
941 static int snd_ca0106_ac97(ca0106_t *chip)
942 {
943 	ac97_bus_t *pbus;
944 	ac97_template_t ac97;
945 	int err;
946 	static ac97_bus_ops_t ops = {
947 		.write = snd_ca0106_ac97_write,
948 		.read = snd_ca0106_ac97_read,
949 	};
950 
951 	if ((err = snd_ac97_bus(chip->card, 0, &ops, NULL, &pbus)) < 0)
952 		return err;
953 	pbus->no_vra = 1; /* we don't need VRA */
954 
955 	memset(&ac97, 0, sizeof(ac97));
956 	ac97.private_data = chip;
957 	ac97.scaps = AC97_SCAP_NO_SPDIF;
958 	return snd_ac97_mixer(pbus, &ac97, &chip->ac97);
959 }
960 
961 static int snd_ca0106_free(ca0106_t *chip)
962 {
963 	if (chip->res_port != NULL) {    /* avoid access to already used hardware */
964 		// disable interrupts
965 		snd_ca0106_ptr_write(chip, BASIC_INTERRUPT, 0, 0);
966 		outl(0, chip->port + INTE);
967 		snd_ca0106_ptr_write(chip, EXTENDED_INT_MASK, 0, 0);
968 		udelay(1000);
969 		// disable audio
970 		//outl(HCFG_LOCKSOUNDCACHE, chip->port + HCFG);
971 		outl(0, chip->port + HCFG);
972 		/* FIXME: We need to stop and DMA transfers here.
973 		 *        But as I am not sure how yet, we cannot from the dma pages.
974 		 * So we can fix: snd-malloc: Memory leak?  pages not freed = 8
975 		 */
976 	}
977 	// release the data
978 #if 1
979 	if (chip->buffer.area)
980 		snd_dma_free_pages(&chip->buffer);
981 #endif
982 
983 	// release the i/o port
984 	release_and_free_resource(chip->res_port);
985 
986 	// release the irq
987 	if (chip->irq >= 0)
988 		free_irq(chip->irq, (void *)chip);
989 	pci_disable_device(chip->pci);
990 	kfree(chip);
991 	return 0;
992 }
993 
994 static int snd_ca0106_dev_free(snd_device_t *device)
995 {
996 	ca0106_t *chip = device->device_data;
997 	return snd_ca0106_free(chip);
998 }
999 
1000 static irqreturn_t snd_ca0106_interrupt(int irq, void *dev_id,
1001 					  struct pt_regs *regs)
1002 {
1003 	unsigned int status;
1004 
1005 	ca0106_t *chip = dev_id;
1006 	int i;
1007 	int mask;
1008         unsigned int stat76;
1009 	ca0106_channel_t *pchannel;
1010 
1011 	spin_lock(&chip->emu_lock);
1012 
1013 	status = inl(chip->port + IPR);
1014 
1015 	// call updater, unlock before it
1016 	spin_unlock(&chip->emu_lock);
1017 
1018 	if (! status)
1019 		return IRQ_NONE;
1020 
1021         stat76 = snd_ca0106_ptr_read(chip, EXTENDED_INT, 0);
1022 	//snd_printk("interrupt status = 0x%08x, stat76=0x%08x\n", status, stat76);
1023 	//snd_printk("ptr=0x%08x\n",snd_ca0106_ptr_read(chip, PLAYBACK_POINTER, 0));
1024         mask = 0x11; /* 0x1 for one half, 0x10 for the other half period. */
1025 	for(i = 0; i < 4; i++) {
1026 		pchannel = &(chip->playback_channels[i]);
1027 		if(stat76 & mask) {
1028 /* FIXME: Select the correct substream for period elapsed */
1029 			if(pchannel->use) {
1030                           snd_pcm_period_elapsed(pchannel->epcm->substream);
1031 	                //printk(KERN_INFO "interrupt [%d] used\n", i);
1032                         }
1033 		}
1034 	        //printk(KERN_INFO "channel=%p\n",pchannel);
1035 	        //printk(KERN_INFO "interrupt stat76[%d] = %08x, use=%d, channel=%d\n", i, stat76, pchannel->use, pchannel->number);
1036 		mask <<= 1;
1037 	}
1038         mask = 0x110000; /* 0x1 for one half, 0x10 for the other half period. */
1039 	for(i = 0; i < 4; i++) {
1040 		pchannel = &(chip->capture_channels[i]);
1041 		if(stat76 & mask) {
1042 /* FIXME: Select the correct substream for period elapsed */
1043 			if(pchannel->use) {
1044                           snd_pcm_period_elapsed(pchannel->epcm->substream);
1045 	                //printk(KERN_INFO "interrupt [%d] used\n", i);
1046                         }
1047 		}
1048 	        //printk(KERN_INFO "channel=%p\n",pchannel);
1049 	        //printk(KERN_INFO "interrupt stat76[%d] = %08x, use=%d, channel=%d\n", i, stat76, pchannel->use, pchannel->number);
1050 		mask <<= 1;
1051 	}
1052 
1053         snd_ca0106_ptr_write(chip, EXTENDED_INT, 0, stat76);
1054 	spin_lock(&chip->emu_lock);
1055 
1056 	if (chip->midi.dev_id &&
1057 	  (status & (chip->midi.ipr_tx|chip->midi.ipr_rx))) {
1058 		if (chip->midi.interrupt)
1059 			chip->midi.interrupt(&chip->midi, status);
1060 		else
1061 			chip->midi.interrupt_disable(&chip->midi, chip->midi.tx_enable | chip->midi.rx_enable);
1062 	}
1063 
1064 	// acknowledge the interrupt if necessary
1065 	outl(status, chip->port+IPR);
1066 
1067 	spin_unlock(&chip->emu_lock);
1068 
1069 	return IRQ_HANDLED;
1070 }
1071 
1072 static void snd_ca0106_pcm_free(snd_pcm_t *pcm)
1073 {
1074 	ca0106_t *emu = pcm->private_data;
1075 	emu->pcm = NULL;
1076 	snd_pcm_lib_preallocate_free_for_all(pcm);
1077 }
1078 
1079 static int __devinit snd_ca0106_pcm(ca0106_t *emu, int device, snd_pcm_t **rpcm)
1080 {
1081 	snd_pcm_t *pcm;
1082 	snd_pcm_substream_t *substream;
1083 	int err;
1084 
1085 	if (rpcm)
1086 		*rpcm = NULL;
1087 	if ((err = snd_pcm_new(emu->card, "ca0106", device, 1, 1, &pcm)) < 0)
1088 		return err;
1089 
1090 	pcm->private_data = emu;
1091 	pcm->private_free = snd_ca0106_pcm_free;
1092 
1093 	switch (device) {
1094 	case 0:
1095 	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_front_ops);
1096 	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_0_ops);
1097           break;
1098 	case 1:
1099 	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_rear_ops);
1100 	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_1_ops);
1101           break;
1102 	case 2:
1103 	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_center_lfe_ops);
1104 	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_2_ops);
1105           break;
1106 	case 3:
1107 	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_unknown_ops);
1108 	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_3_ops);
1109           break;
1110         }
1111 
1112 	pcm->info_flags = 0;
1113 	pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
1114 	strcpy(pcm->name, "CA0106");
1115 	emu->pcm = pcm;
1116 
1117 	for(substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
1118 	    substream;
1119 	    substream = substream->next) {
1120 		if ((err = snd_pcm_lib_preallocate_pages(substream,
1121 							 SNDRV_DMA_TYPE_DEV,
1122 							 snd_dma_pci_data(emu->pci),
1123 							 64*1024, 64*1024)) < 0) /* FIXME: 32*1024 for sound buffer, between 32and64 for Periods table. */
1124 			return err;
1125 	}
1126 
1127 	for (substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
1128 	      substream;
1129 	      substream = substream->next) {
1130  		if ((err = snd_pcm_lib_preallocate_pages(substream,
1131 	                                           SNDRV_DMA_TYPE_DEV,
1132 	                                           snd_dma_pci_data(emu->pci),
1133 	                                           64*1024, 64*1024)) < 0)
1134 			return err;
1135 	}
1136 
1137 	if (rpcm)
1138 		*rpcm = pcm;
1139 
1140 	return 0;
1141 }
1142 
1143 static int __devinit snd_ca0106_create(snd_card_t *card,
1144 					 struct pci_dev *pci,
1145 					 ca0106_t **rchip)
1146 {
1147 	ca0106_t *chip;
1148 	ca0106_details_t *c;
1149 	int err;
1150 	int ch;
1151 	static snd_device_ops_t ops = {
1152 		.dev_free = snd_ca0106_dev_free,
1153 	};
1154 
1155 	*rchip = NULL;
1156 
1157 	if ((err = pci_enable_device(pci)) < 0)
1158 		return err;
1159 	if (pci_set_dma_mask(pci, DMA_32BIT_MASK) < 0 ||
1160 	    pci_set_consistent_dma_mask(pci, DMA_32BIT_MASK) < 0) {
1161 		printk(KERN_ERR "error to set 32bit mask DMA\n");
1162 		pci_disable_device(pci);
1163 		return -ENXIO;
1164 	}
1165 
1166 	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1167 	if (chip == NULL) {
1168 		pci_disable_device(pci);
1169 		return -ENOMEM;
1170 	}
1171 
1172 	chip->card = card;
1173 	chip->pci = pci;
1174 	chip->irq = -1;
1175 
1176 	spin_lock_init(&chip->emu_lock);
1177 
1178 	chip->port = pci_resource_start(pci, 0);
1179 	if ((chip->res_port = request_region(chip->port, 0x20,
1180 					     "snd_ca0106")) == NULL) {
1181 		snd_ca0106_free(chip);
1182 		printk(KERN_ERR "cannot allocate the port\n");
1183 		return -EBUSY;
1184 	}
1185 
1186 	if (request_irq(pci->irq, snd_ca0106_interrupt,
1187 			SA_INTERRUPT|SA_SHIRQ, "snd_ca0106",
1188 			(void *)chip)) {
1189 		snd_ca0106_free(chip);
1190 		printk(KERN_ERR "cannot grab irq\n");
1191 		return -EBUSY;
1192 	}
1193 	chip->irq = pci->irq;
1194 
1195  	/* This stores the periods table. */
1196 	if(snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(pci), 1024, &chip->buffer) < 0) {
1197 		snd_ca0106_free(chip);
1198 		return -ENOMEM;
1199 	}
1200 
1201 	pci_set_master(pci);
1202 	/* read revision & serial */
1203 	pci_read_config_byte(pci, PCI_REVISION_ID, (char *)&chip->revision);
1204 	pci_read_config_dword(pci, PCI_SUBSYSTEM_VENDOR_ID, &chip->serial);
1205 	pci_read_config_word(pci, PCI_SUBSYSTEM_ID, &chip->model);
1206 #if 1
1207 	printk(KERN_INFO "Model %04x Rev %08x Serial %08x\n", chip->model,
1208 	       chip->revision, chip->serial);
1209 #endif
1210 	strcpy(card->driver, "CA0106");
1211 	strcpy(card->shortname, "CA0106");
1212 
1213 	for (c=ca0106_chip_details; c->serial; c++) {
1214 		if (c->serial == chip->serial) break;
1215 	}
1216 	chip->details = c;
1217 	sprintf(card->longname, "%s at 0x%lx irq %i",
1218 		c->name, chip->port, chip->irq);
1219 
1220 	outl(0, chip->port + INTE);
1221 
1222 	/*
1223 	 *  Init to 0x02109204 :
1224 	 *  Clock accuracy    = 0     (1000ppm)
1225 	 *  Sample Rate       = 2     (48kHz)
1226 	 *  Audio Channel     = 1     (Left of 2)
1227 	 *  Source Number     = 0     (Unspecified)
1228 	 *  Generation Status = 1     (Original for Cat Code 12)
1229 	 *  Cat Code          = 12    (Digital Signal Mixer)
1230 	 *  Mode              = 0     (Mode 0)
1231 	 *  Emphasis          = 0     (None)
1232 	 *  CP                = 1     (Copyright unasserted)
1233 	 *  AN                = 0     (Audio data)
1234 	 *  P                 = 0     (Consumer)
1235 	 */
1236 	snd_ca0106_ptr_write(chip, SPCS0, 0,
1237 				chip->spdif_bits[0] =
1238 				SPCS_CLKACCY_1000PPM | SPCS_SAMPLERATE_48 |
1239 				SPCS_CHANNELNUM_LEFT | SPCS_SOURCENUM_UNSPEC |
1240 				SPCS_GENERATIONSTATUS | 0x00001200 |
1241 				0x00000000 | SPCS_EMPHASIS_NONE | SPCS_COPYRIGHT);
1242 	/* Only SPCS1 has been tested */
1243 	snd_ca0106_ptr_write(chip, SPCS1, 0,
1244 				chip->spdif_bits[1] =
1245 				SPCS_CLKACCY_1000PPM | SPCS_SAMPLERATE_48 |
1246 				SPCS_CHANNELNUM_LEFT | SPCS_SOURCENUM_UNSPEC |
1247 				SPCS_GENERATIONSTATUS | 0x00001200 |
1248 				0x00000000 | SPCS_EMPHASIS_NONE | SPCS_COPYRIGHT);
1249 	snd_ca0106_ptr_write(chip, SPCS2, 0,
1250 				chip->spdif_bits[2] =
1251 				SPCS_CLKACCY_1000PPM | SPCS_SAMPLERATE_48 |
1252 				SPCS_CHANNELNUM_LEFT | SPCS_SOURCENUM_UNSPEC |
1253 				SPCS_GENERATIONSTATUS | 0x00001200 |
1254 				0x00000000 | SPCS_EMPHASIS_NONE | SPCS_COPYRIGHT);
1255 	snd_ca0106_ptr_write(chip, SPCS3, 0,
1256 				chip->spdif_bits[3] =
1257 				SPCS_CLKACCY_1000PPM | SPCS_SAMPLERATE_48 |
1258 				SPCS_CHANNELNUM_LEFT | SPCS_SOURCENUM_UNSPEC |
1259 				SPCS_GENERATIONSTATUS | 0x00001200 |
1260 				0x00000000 | SPCS_EMPHASIS_NONE | SPCS_COPYRIGHT);
1261 
1262         snd_ca0106_ptr_write(chip, PLAYBACK_MUTE, 0, 0x00fc0000);
1263         snd_ca0106_ptr_write(chip, CAPTURE_MUTE, 0, 0x00fc0000);
1264 
1265         /* Write 0x8000 to AC97_REC_GAIN to mute it. */
1266         outb(AC97_REC_GAIN, chip->port + AC97ADDRESS);
1267         outw(0x8000, chip->port + AC97DATA);
1268 #if 0
1269 	snd_ca0106_ptr_write(chip, SPCS0, 0, 0x2108006);
1270 	snd_ca0106_ptr_write(chip, 0x42, 0, 0x2108006);
1271 	snd_ca0106_ptr_write(chip, 0x43, 0, 0x2108006);
1272 	snd_ca0106_ptr_write(chip, 0x44, 0, 0x2108006);
1273 #endif
1274 
1275 	//snd_ca0106_ptr_write(chip, SPDIF_SELECT2, 0, 0xf0f003f); /* OSS drivers set this. */
1276 	/* Analog or Digital output */
1277 	snd_ca0106_ptr_write(chip, SPDIF_SELECT1, 0, 0xf);
1278 	snd_ca0106_ptr_write(chip, SPDIF_SELECT2, 0, 0x000f0000); /* 0x0b000000 for digital, 0x000b0000 for analog, from win2000 drivers. Use 0x000f0000 for surround71 */
1279 	chip->spdif_enable = 0; /* Set digital SPDIF output off */
1280 	chip->capture_source = 3; /* Set CAPTURE_SOURCE */
1281 	//snd_ca0106_ptr_write(chip, 0x45, 0, 0); /* Analogue out */
1282 	//snd_ca0106_ptr_write(chip, 0x45, 0, 0xf00); /* Digital out */
1283 
1284 	snd_ca0106_ptr_write(chip, CAPTURE_CONTROL, 0, 0x40c81000); /* goes to 0x40c80000 when doing SPDIF IN/OUT */
1285 	snd_ca0106_ptr_write(chip, CAPTURE_CONTROL, 1, 0xffffffff); /* (Mute) CAPTURE feedback into PLAYBACK volume. Only lower 16 bits matter. */
1286 	snd_ca0106_ptr_write(chip, CAPTURE_CONTROL, 2, 0x30300000); /* SPDIF IN Volume */
1287 	snd_ca0106_ptr_write(chip, CAPTURE_CONTROL, 3, 0x00700000); /* SPDIF IN Volume, 0x70 = (vol & 0x3f) | 0x40 */
1288 	snd_ca0106_ptr_write(chip, PLAYBACK_ROUTING1, 0, 0x32765410);
1289 	snd_ca0106_ptr_write(chip, PLAYBACK_ROUTING2, 0, 0x76767676);
1290 	snd_ca0106_ptr_write(chip, CAPTURE_ROUTING1, 0, 0x32765410);
1291 	snd_ca0106_ptr_write(chip, CAPTURE_ROUTING2, 0, 0x76767676);
1292 	for(ch = 0; ch < 4; ch++) {
1293 		snd_ca0106_ptr_write(chip, CAPTURE_VOLUME1, ch, 0x30303030); /* Only high 16 bits matter */
1294 		snd_ca0106_ptr_write(chip, CAPTURE_VOLUME2, ch, 0x30303030);
1295 		//snd_ca0106_ptr_write(chip, PLAYBACK_VOLUME1, ch, 0x40404040); /* Mute */
1296 		//snd_ca0106_ptr_write(chip, PLAYBACK_VOLUME2, ch, 0x40404040); /* Mute */
1297 		snd_ca0106_ptr_write(chip, PLAYBACK_VOLUME1, ch, 0xffffffff); /* Mute */
1298 		snd_ca0106_ptr_write(chip, PLAYBACK_VOLUME2, ch, 0xffffffff); /* Mute */
1299 	}
1300         snd_ca0106_ptr_write(chip, CAPTURE_SOURCE, 0x0, 0x333300e4); /* Select MIC, Line in, TAD in, AUX in */
1301 	chip->capture_source = 3; /* Set CAPTURE_SOURCE */
1302 
1303         if (chip->details->gpio_type == 1) { /* The SB0410 and SB0413 use GPIO differently. */
1304 		/* FIXME: Still need to find out what the other GPIO bits do. E.g. For digital spdif out. */
1305 		outl(0x0, chip->port+GPIO);
1306 		//outl(0x00f0e000, chip->port+GPIO); /* Analog */
1307 		outl(0x005f5301, chip->port+GPIO); /* Analog */
1308 	} else {
1309 		outl(0x0, chip->port+GPIO);
1310 		outl(0x005f03a3, chip->port+GPIO); /* Analog */
1311 		//outl(0x005f02a2, chip->port+GPIO);   /* SPDIF */
1312 	}
1313 	snd_ca0106_intr_enable(chip, 0x105); /* Win2000 uses 0x1e0 */
1314 
1315 	//outl(HCFG_LOCKSOUNDCACHE|HCFG_AUDIOENABLE, chip->port+HCFG);
1316 	//outl(0x00001409, chip->port+HCFG); /* 0x1000 causes AC3 to fails. Maybe it effects 24 bit output. */
1317 	//outl(0x00000009, chip->port+HCFG);
1318 	outl(HCFG_AC97 | HCFG_AUDIOENABLE, chip->port+HCFG); /* AC97 2.0, Enable outputs. */
1319 
1320         if (chip->details->i2c_adc == 1) { /* The SB0410 and SB0413 use I2C to control ADC. */
1321 	        snd_ca0106_i2c_write(chip, ADC_MUX, ADC_MUX_LINEIN); /* Enable Line-in capture. MIC in currently untested. */
1322 	}
1323 
1324 	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
1325 				  chip, &ops)) < 0) {
1326 		snd_ca0106_free(chip);
1327 		return err;
1328 	}
1329 	*rchip = chip;
1330 	return 0;
1331 }
1332 
1333 
1334 static void ca0106_midi_interrupt_enable(ca_midi_t *midi, int intr)
1335 {
1336 	snd_ca0106_intr_enable((ca0106_t *)(midi->dev_id), intr);
1337 }
1338 
1339 static void ca0106_midi_interrupt_disable(ca_midi_t *midi, int intr)
1340 {
1341 	snd_ca0106_intr_disable((ca0106_t *)(midi->dev_id), intr);
1342 }
1343 
1344 static unsigned char ca0106_midi_read(ca_midi_t *midi, int idx)
1345 {
1346 	return (unsigned char)snd_ca0106_ptr_read((ca0106_t *)(midi->dev_id), midi->port + idx, 0);
1347 }
1348 
1349 static void ca0106_midi_write(ca_midi_t *midi, int data, int idx)
1350 {
1351 	snd_ca0106_ptr_write((ca0106_t *)(midi->dev_id), midi->port + idx, 0, data);
1352 }
1353 
1354 static snd_card_t *ca0106_dev_id_card(void *dev_id)
1355 {
1356 	return ((ca0106_t *)dev_id)->card;
1357 }
1358 
1359 static int ca0106_dev_id_port(void *dev_id)
1360 {
1361 	return ((ca0106_t *)dev_id)->port;
1362 }
1363 
1364 static int __devinit snd_ca0106_midi(ca0106_t *chip, unsigned int channel)
1365 {
1366 	ca_midi_t *midi;
1367 	char *name;
1368 	int err;
1369 
1370         if(channel==CA0106_MIDI_CHAN_B) {
1371 		name = "CA0106 MPU-401 (UART) B";
1372 		midi =  &chip->midi2;
1373 		midi->tx_enable = INTE_MIDI_TX_B;
1374 		midi->rx_enable = INTE_MIDI_RX_B;
1375 		midi->ipr_tx = IPR_MIDI_TX_B;
1376 		midi->ipr_rx = IPR_MIDI_RX_B;
1377 		midi->port = MIDI_UART_B_DATA;
1378 	} else {
1379 		name = "CA0106 MPU-401 (UART)";
1380 		midi =  &chip->midi;
1381 		midi->tx_enable = INTE_MIDI_TX_A;
1382 		midi->rx_enable = INTE_MIDI_TX_B;
1383 		midi->ipr_tx = IPR_MIDI_TX_A;
1384 		midi->ipr_rx = IPR_MIDI_RX_A;
1385 		midi->port = MIDI_UART_A_DATA;
1386 	}
1387 
1388 	midi->reset = CA0106_MPU401_RESET;
1389 	midi->enter_uart = CA0106_MPU401_ENTER_UART;
1390 	midi->ack = CA0106_MPU401_ACK;
1391 
1392 	midi->input_avail = CA0106_MIDI_INPUT_AVAIL;
1393 	midi->output_ready = CA0106_MIDI_OUTPUT_READY;
1394 
1395 	midi->channel = channel;
1396 
1397 	midi->interrupt_enable = ca0106_midi_interrupt_enable;
1398 	midi->interrupt_disable = ca0106_midi_interrupt_disable;
1399 
1400 	midi->read = ca0106_midi_read;
1401 	midi->write = ca0106_midi_write;
1402 
1403 	midi->get_dev_id_card = ca0106_dev_id_card;
1404 	midi->get_dev_id_port = ca0106_dev_id_port;
1405 
1406 	midi->dev_id = chip;
1407 
1408 	if ((err = ca_midi_init(chip, midi, 0, name)) < 0)
1409 		return err;
1410 
1411 	return 0;
1412 }
1413 
1414 
1415 static int __devinit snd_ca0106_probe(struct pci_dev *pci,
1416 					const struct pci_device_id *pci_id)
1417 {
1418 	static int dev;
1419 	snd_card_t *card;
1420 	ca0106_t *chip;
1421 	int err;
1422 
1423 	if (dev >= SNDRV_CARDS)
1424 		return -ENODEV;
1425 	if (!enable[dev]) {
1426 		dev++;
1427 		return -ENOENT;
1428 	}
1429 
1430 	card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
1431 	if (card == NULL)
1432 		return -ENOMEM;
1433 
1434 	if ((err = snd_ca0106_create(card, pci, &chip)) < 0) {
1435 		snd_card_free(card);
1436 		return err;
1437 	}
1438 
1439 	if ((err = snd_ca0106_pcm(chip, 0, NULL)) < 0) {
1440 		snd_card_free(card);
1441 		return err;
1442 	}
1443 	if ((err = snd_ca0106_pcm(chip, 1, NULL)) < 0) {
1444 		snd_card_free(card);
1445 		return err;
1446 	}
1447 	if ((err = snd_ca0106_pcm(chip, 2, NULL)) < 0) {
1448 		snd_card_free(card);
1449 		return err;
1450 	}
1451 	if ((err = snd_ca0106_pcm(chip, 3, NULL)) < 0) {
1452 		snd_card_free(card);
1453 		return err;
1454 	}
1455         if (chip->details->ac97 == 1) { /* The SB0410 and SB0413 do not have an AC97 chip. */
1456 		if ((err = snd_ca0106_ac97(chip)) < 0) {
1457 			snd_card_free(card);
1458 			return err;
1459 		}
1460 	}
1461 	if ((err = snd_ca0106_mixer(chip)) < 0) {
1462 		snd_card_free(card);
1463 		return err;
1464 	}
1465 
1466 	snd_printdd("ca0106: probe for MIDI channel A ...");
1467 	if ((err = snd_ca0106_midi(chip,CA0106_MIDI_CHAN_A)) < 0) {
1468 		snd_card_free(card);
1469 		snd_printdd(" failed, err=0x%x\n",err);
1470 		return err;
1471 	}
1472 	snd_printdd(" done.\n");
1473 
1474 	snd_ca0106_proc_init(chip);
1475 
1476 	if ((err = snd_card_register(card)) < 0) {
1477 		snd_card_free(card);
1478 		return err;
1479 	}
1480 
1481 	pci_set_drvdata(pci, card);
1482 	dev++;
1483 	return 0;
1484 }
1485 
1486 static void __devexit snd_ca0106_remove(struct pci_dev *pci)
1487 {
1488 	snd_card_free(pci_get_drvdata(pci));
1489 	pci_set_drvdata(pci, NULL);
1490 }
1491 
1492 // PCI IDs
1493 static struct pci_device_id snd_ca0106_ids[] = {
1494 	{ 0x1102, 0x0007, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },	/* Audigy LS or Live 24bit */
1495 	{ 0, }
1496 };
1497 MODULE_DEVICE_TABLE(pci, snd_ca0106_ids);
1498 
1499 // pci_driver definition
1500 static struct pci_driver driver = {
1501 	.name = "CA0106",
1502 	.id_table = snd_ca0106_ids,
1503 	.probe = snd_ca0106_probe,
1504 	.remove = __devexit_p(snd_ca0106_remove),
1505 };
1506 
1507 // initialization of the module
1508 static int __init alsa_card_ca0106_init(void)
1509 {
1510 	int err;
1511 
1512 	if ((err = pci_register_driver(&driver)) > 0)
1513 		return err;
1514 
1515 	return 0;
1516 }
1517 
1518 // clean up the module
1519 static void __exit alsa_card_ca0106_exit(void)
1520 {
1521 	pci_unregister_driver(&driver);
1522 }
1523 
1524 module_init(alsa_card_ca0106_init)
1525 module_exit(alsa_card_ca0106_exit)
1526