xref: /linux/sound/pci/ca0106/ca0106_main.c (revision 54a8a2220c936a47840c9a3d74910c5a56fae2ed)
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("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("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_pcm_free_substream(snd_pcm_runtime_t *runtime)
342 {
343 	kfree(runtime->private_data);
344 }
345 
346 /* open_playback callback */
347 static int snd_ca0106_pcm_open_playback_channel(snd_pcm_substream_t *substream, int channel_id)
348 {
349 	ca0106_t *chip = snd_pcm_substream_chip(substream);
350         ca0106_channel_t *channel = &(chip->playback_channels[channel_id]);
351 	ca0106_pcm_t *epcm;
352 	snd_pcm_runtime_t *runtime = substream->runtime;
353 	int err;
354 
355 	epcm = kzalloc(sizeof(*epcm), GFP_KERNEL);
356 
357 	if (epcm == NULL)
358 		return -ENOMEM;
359 	epcm->emu = chip;
360 	epcm->substream = substream;
361         epcm->channel_id=channel_id;
362 
363 	runtime->private_data = epcm;
364 	runtime->private_free = snd_ca0106_pcm_free_substream;
365 
366 	runtime->hw = snd_ca0106_playback_hw;
367 
368         channel->emu = chip;
369         channel->number = channel_id;
370 
371         channel->use=1;
372         //printk("open:channel_id=%d, chip=%p, channel=%p\n",channel_id, chip, channel);
373         //channel->interrupt = snd_ca0106_pcm_channel_interrupt;
374         channel->epcm=epcm;
375 	if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
376                 return err;
377 	if ((err = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 64)) < 0)
378                 return err;
379 	return 0;
380 }
381 
382 /* close callback */
383 static int snd_ca0106_pcm_close_playback(snd_pcm_substream_t *substream)
384 {
385 	ca0106_t *chip = snd_pcm_substream_chip(substream);
386 	snd_pcm_runtime_t *runtime = substream->runtime;
387         ca0106_pcm_t *epcm = runtime->private_data;
388         chip->playback_channels[epcm->channel_id].use=0;
389 /* FIXME: maybe zero others */
390 	return 0;
391 }
392 
393 static int snd_ca0106_pcm_open_playback_front(snd_pcm_substream_t *substream)
394 {
395 	return snd_ca0106_pcm_open_playback_channel(substream, PCM_FRONT_CHANNEL);
396 }
397 
398 static int snd_ca0106_pcm_open_playback_center_lfe(snd_pcm_substream_t *substream)
399 {
400 	return snd_ca0106_pcm_open_playback_channel(substream, PCM_CENTER_LFE_CHANNEL);
401 }
402 
403 static int snd_ca0106_pcm_open_playback_unknown(snd_pcm_substream_t *substream)
404 {
405 	return snd_ca0106_pcm_open_playback_channel(substream, PCM_UNKNOWN_CHANNEL);
406 }
407 
408 static int snd_ca0106_pcm_open_playback_rear(snd_pcm_substream_t *substream)
409 {
410 	return snd_ca0106_pcm_open_playback_channel(substream, PCM_REAR_CHANNEL);
411 }
412 
413 /* open_capture callback */
414 static int snd_ca0106_pcm_open_capture_channel(snd_pcm_substream_t *substream, int channel_id)
415 {
416 	ca0106_t *chip = snd_pcm_substream_chip(substream);
417         ca0106_channel_t *channel = &(chip->capture_channels[channel_id]);
418 	ca0106_pcm_t *epcm;
419 	snd_pcm_runtime_t *runtime = substream->runtime;
420 	int err;
421 
422 	epcm = kzalloc(sizeof(*epcm), GFP_KERNEL);
423 	if (epcm == NULL) {
424                 snd_printk("open_capture_channel: failed epcm alloc\n");
425 		return -ENOMEM;
426         }
427 	epcm->emu = chip;
428 	epcm->substream = substream;
429         epcm->channel_id=channel_id;
430 
431 	runtime->private_data = epcm;
432 	runtime->private_free = snd_ca0106_pcm_free_substream;
433 
434 	runtime->hw = snd_ca0106_capture_hw;
435 
436         channel->emu = chip;
437         channel->number = channel_id;
438 
439         channel->use=1;
440         //printk("open:channel_id=%d, chip=%p, channel=%p\n",channel_id, chip, channel);
441         //channel->interrupt = snd_ca0106_pcm_channel_interrupt;
442         channel->epcm=epcm;
443 	if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
444                 return err;
445 	//snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, &hw_constraints_capture_period_sizes);
446 	if ((err = snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 64)) < 0)
447                 return err;
448 	return 0;
449 }
450 
451 /* close callback */
452 static int snd_ca0106_pcm_close_capture(snd_pcm_substream_t *substream)
453 {
454 	ca0106_t *chip = snd_pcm_substream_chip(substream);
455 	snd_pcm_runtime_t *runtime = substream->runtime;
456         ca0106_pcm_t *epcm = runtime->private_data;
457         chip->capture_channels[epcm->channel_id].use=0;
458 /* FIXME: maybe zero others */
459 	return 0;
460 }
461 
462 static int snd_ca0106_pcm_open_0_capture(snd_pcm_substream_t *substream)
463 {
464 	return snd_ca0106_pcm_open_capture_channel(substream, 0);
465 }
466 
467 static int snd_ca0106_pcm_open_1_capture(snd_pcm_substream_t *substream)
468 {
469 	return snd_ca0106_pcm_open_capture_channel(substream, 1);
470 }
471 
472 static int snd_ca0106_pcm_open_2_capture(snd_pcm_substream_t *substream)
473 {
474 	return snd_ca0106_pcm_open_capture_channel(substream, 2);
475 }
476 
477 static int snd_ca0106_pcm_open_3_capture(snd_pcm_substream_t *substream)
478 {
479 	return snd_ca0106_pcm_open_capture_channel(substream, 3);
480 }
481 
482 /* hw_params callback */
483 static int snd_ca0106_pcm_hw_params_playback(snd_pcm_substream_t *substream,
484 				      snd_pcm_hw_params_t * hw_params)
485 {
486 	return snd_pcm_lib_malloc_pages(substream,
487 					params_buffer_bytes(hw_params));
488 }
489 
490 /* hw_free callback */
491 static int snd_ca0106_pcm_hw_free_playback(snd_pcm_substream_t *substream)
492 {
493 	return snd_pcm_lib_free_pages(substream);
494 }
495 
496 /* hw_params callback */
497 static int snd_ca0106_pcm_hw_params_capture(snd_pcm_substream_t *substream,
498 				      snd_pcm_hw_params_t * hw_params)
499 {
500 	return snd_pcm_lib_malloc_pages(substream,
501 					params_buffer_bytes(hw_params));
502 }
503 
504 /* hw_free callback */
505 static int snd_ca0106_pcm_hw_free_capture(snd_pcm_substream_t *substream)
506 {
507 	return snd_pcm_lib_free_pages(substream);
508 }
509 
510 /* prepare playback callback */
511 static int snd_ca0106_pcm_prepare_playback(snd_pcm_substream_t *substream)
512 {
513 	ca0106_t *emu = snd_pcm_substream_chip(substream);
514 	snd_pcm_runtime_t *runtime = substream->runtime;
515 	ca0106_pcm_t *epcm = runtime->private_data;
516 	int channel = epcm->channel_id;
517 	u32 *table_base = (u32 *)(emu->buffer.area+(8*16*channel));
518 	u32 period_size_bytes = frames_to_bytes(runtime, runtime->period_size);
519 	u32 hcfg_mask = HCFG_PLAYBACK_S32_LE;
520 	u32 hcfg_set = 0x00000000;
521 	u32 hcfg;
522 	u32 reg40_mask = 0x30000 << (channel<<1);
523 	u32 reg40_set = 0;
524 	u32 reg40;
525 	/* FIXME: Depending on mixer selection of SPDIF out or not, select the spdif rate or the DAC rate. */
526 	u32 reg71_mask = 0x03030000 ; /* Global. Set SPDIF rate. We only support 44100 to spdif, not to DAC. */
527 	u32 reg71_set = 0;
528 	u32 reg71;
529 	int i;
530 
531         //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));
532         //snd_printk("dma_addr=%x, dma_area=%p, table_base=%p\n",runtime->dma_addr, runtime->dma_area, table_base);
533 	//snd_printk("dma_addr=%x, dma_area=%p, dma_bytes(size)=%x\n",emu->buffer.addr, emu->buffer.area, emu->buffer.bytes);
534 	/* Rate can be set per channel. */
535 	/* reg40 control host to fifo */
536 	/* reg71 controls DAC rate. */
537 	switch (runtime->rate) {
538 	case 44100:
539 		reg40_set = 0x10000 << (channel<<1);
540 		reg71_set = 0x01010000;
541 		break;
542         case 48000:
543 		reg40_set = 0;
544 		reg71_set = 0;
545 		break;
546 	case 96000:
547 		reg40_set = 0x20000 << (channel<<1);
548 		reg71_set = 0x02020000;
549 		break;
550 	case 192000:
551 		reg40_set = 0x30000 << (channel<<1);
552 		reg71_set = 0x03030000;
553 		break;
554 	default:
555 		reg40_set = 0;
556 		reg71_set = 0;
557 		break;
558 	}
559 	/* Format is a global setting */
560 	/* FIXME: Only let the first channel accessed set this. */
561 	switch (runtime->format) {
562 	case SNDRV_PCM_FORMAT_S16_LE:
563 		hcfg_set = 0;
564 		break;
565 	case SNDRV_PCM_FORMAT_S32_LE:
566 		hcfg_set = HCFG_PLAYBACK_S32_LE;
567 		break;
568 	default:
569 		hcfg_set = 0;
570 		break;
571 	}
572 	hcfg = inl(emu->port + HCFG) ;
573 	hcfg = (hcfg & ~hcfg_mask) | hcfg_set;
574 	outl(hcfg, emu->port + HCFG);
575 	reg40 = snd_ca0106_ptr_read(emu, 0x40, 0);
576 	reg40 = (reg40 & ~reg40_mask) | reg40_set;
577 	snd_ca0106_ptr_write(emu, 0x40, 0, reg40);
578 	reg71 = snd_ca0106_ptr_read(emu, 0x71, 0);
579 	reg71 = (reg71 & ~reg71_mask) | reg71_set;
580 	snd_ca0106_ptr_write(emu, 0x71, 0, reg71);
581 
582 	/* FIXME: Check emu->buffer.size before actually writing to it. */
583         for(i=0; i < runtime->periods; i++) {
584 		table_base[i*2]=runtime->dma_addr+(i*period_size_bytes);
585 		table_base[(i*2)+1]=period_size_bytes<<16;
586 	}
587 
588 	snd_ca0106_ptr_write(emu, PLAYBACK_LIST_ADDR, channel, emu->buffer.addr+(8*16*channel));
589 	snd_ca0106_ptr_write(emu, PLAYBACK_LIST_SIZE, channel, (runtime->periods - 1) << 19);
590 	snd_ca0106_ptr_write(emu, PLAYBACK_LIST_PTR, channel, 0);
591 	snd_ca0106_ptr_write(emu, PLAYBACK_DMA_ADDR, channel, runtime->dma_addr);
592 	snd_ca0106_ptr_write(emu, PLAYBACK_PERIOD_SIZE, channel, frames_to_bytes(runtime, runtime->period_size)<<16); // buffer size in bytes
593 	/* FIXME  test what 0 bytes does. */
594 	snd_ca0106_ptr_write(emu, PLAYBACK_PERIOD_SIZE, channel, 0); // buffer size in bytes
595 	snd_ca0106_ptr_write(emu, PLAYBACK_POINTER, channel, 0);
596 	snd_ca0106_ptr_write(emu, 0x07, channel, 0x0);
597 	snd_ca0106_ptr_write(emu, 0x08, channel, 0);
598         snd_ca0106_ptr_write(emu, PLAYBACK_MUTE, 0x0, 0x0); /* Unmute output */
599 #if 0
600 	snd_ca0106_ptr_write(emu, SPCS0, 0,
601 			       SPCS_CLKACCY_1000PPM | SPCS_SAMPLERATE_48 |
602 			       SPCS_CHANNELNUM_LEFT | SPCS_SOURCENUM_UNSPEC |
603 			       SPCS_GENERATIONSTATUS | 0x00001200 |
604 			       0x00000000 | SPCS_EMPHASIS_NONE | SPCS_COPYRIGHT );
605 	}
606 #endif
607 
608 	return 0;
609 }
610 
611 /* prepare capture callback */
612 static int snd_ca0106_pcm_prepare_capture(snd_pcm_substream_t *substream)
613 {
614 	ca0106_t *emu = snd_pcm_substream_chip(substream);
615 	snd_pcm_runtime_t *runtime = substream->runtime;
616 	ca0106_pcm_t *epcm = runtime->private_data;
617 	int channel = epcm->channel_id;
618 	u32 hcfg_mask = HCFG_CAPTURE_S32_LE;
619 	u32 hcfg_set = 0x00000000;
620 	u32 hcfg;
621 	u32 over_sampling=0x2;
622 	u32 reg71_mask = 0x0000c000 ; /* Global. Set ADC rate. */
623 	u32 reg71_set = 0;
624 	u32 reg71;
625 
626         //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));
627         //snd_printk("dma_addr=%x, dma_area=%p, table_base=%p\n",runtime->dma_addr, runtime->dma_area, table_base);
628 	//snd_printk("dma_addr=%x, dma_area=%p, dma_bytes(size)=%x\n",emu->buffer.addr, emu->buffer.area, emu->buffer.bytes);
629 	/* reg71 controls ADC rate. */
630 	switch (runtime->rate) {
631 	case 44100:
632 		reg71_set = 0x00004000;
633 		break;
634         case 48000:
635 		reg71_set = 0;
636 		break;
637 	case 96000:
638 		reg71_set = 0x00008000;
639 		over_sampling=0xa;
640 		break;
641 	case 192000:
642 		reg71_set = 0x0000c000;
643 		over_sampling=0xa;
644 		break;
645 	default:
646 		reg71_set = 0;
647 		break;
648 	}
649 	/* Format is a global setting */
650 	/* FIXME: Only let the first channel accessed set this. */
651 	switch (runtime->format) {
652 	case SNDRV_PCM_FORMAT_S16_LE:
653 		hcfg_set = 0;
654 		break;
655 	case SNDRV_PCM_FORMAT_S32_LE:
656 		hcfg_set = HCFG_CAPTURE_S32_LE;
657 		break;
658 	default:
659 		hcfg_set = 0;
660 		break;
661 	}
662 	hcfg = inl(emu->port + HCFG) ;
663 	hcfg = (hcfg & ~hcfg_mask) | hcfg_set;
664 	outl(hcfg, emu->port + HCFG);
665 	reg71 = snd_ca0106_ptr_read(emu, 0x71, 0);
666 	reg71 = (reg71 & ~reg71_mask) | reg71_set;
667 	snd_ca0106_ptr_write(emu, 0x71, 0, reg71);
668         if (emu->details->i2c_adc == 1) { /* The SB0410 and SB0413 use I2C to control ADC. */
669 	        snd_ca0106_i2c_write(emu, ADC_MASTER, over_sampling); /* Adjust the over sampler to better suit the capture rate. */
670 	}
671 
672 
673         //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));
674 	snd_ca0106_ptr_write(emu, 0x13, channel, 0);
675 	snd_ca0106_ptr_write(emu, CAPTURE_DMA_ADDR, channel, runtime->dma_addr);
676 	snd_ca0106_ptr_write(emu, CAPTURE_BUFFER_SIZE, channel, frames_to_bytes(runtime, runtime->buffer_size)<<16); // buffer size in bytes
677 	snd_ca0106_ptr_write(emu, CAPTURE_POINTER, channel, 0);
678 
679 	return 0;
680 }
681 
682 /* trigger_playback callback */
683 static int snd_ca0106_pcm_trigger_playback(snd_pcm_substream_t *substream,
684 				    int cmd)
685 {
686 	ca0106_t *emu = snd_pcm_substream_chip(substream);
687 	snd_pcm_runtime_t *runtime;
688 	ca0106_pcm_t *epcm;
689 	int channel;
690 	int result = 0;
691 	struct list_head *pos;
692         snd_pcm_substream_t *s;
693 	u32 basic = 0;
694 	u32 extended = 0;
695 	int running=0;
696 
697 	switch (cmd) {
698 	case SNDRV_PCM_TRIGGER_START:
699 		running=1;
700 		break;
701 	case SNDRV_PCM_TRIGGER_STOP:
702 	default:
703 		running=0;
704 		break;
705 	}
706         snd_pcm_group_for_each(pos, substream) {
707                 s = snd_pcm_group_substream_entry(pos);
708 		runtime = s->runtime;
709 		epcm = runtime->private_data;
710 		channel = epcm->channel_id;
711 		//snd_printk("channel=%d\n",channel);
712 		epcm->running = running;
713 		basic |= (0x1<<channel);
714 		extended |= (0x10<<channel);
715                 snd_pcm_trigger_done(s, substream);
716         }
717 	//snd_printk("basic=0x%x, extended=0x%x\n",basic, extended);
718 
719 	switch (cmd) {
720 	case SNDRV_PCM_TRIGGER_START:
721 		snd_ca0106_ptr_write(emu, EXTENDED_INT_MASK, 0, snd_ca0106_ptr_read(emu, EXTENDED_INT_MASK, 0) | (extended));
722 		snd_ca0106_ptr_write(emu, BASIC_INTERRUPT, 0, snd_ca0106_ptr_read(emu, BASIC_INTERRUPT, 0)|(basic));
723 		break;
724 	case SNDRV_PCM_TRIGGER_STOP:
725 		snd_ca0106_ptr_write(emu, BASIC_INTERRUPT, 0, snd_ca0106_ptr_read(emu, BASIC_INTERRUPT, 0) & ~(basic));
726 		snd_ca0106_ptr_write(emu, EXTENDED_INT_MASK, 0, snd_ca0106_ptr_read(emu, EXTENDED_INT_MASK, 0) & ~(extended));
727 		break;
728 	default:
729 		result = -EINVAL;
730 		break;
731 	}
732 	return result;
733 }
734 
735 /* trigger_capture callback */
736 static int snd_ca0106_pcm_trigger_capture(snd_pcm_substream_t *substream,
737 				    int cmd)
738 {
739 	ca0106_t *emu = snd_pcm_substream_chip(substream);
740 	snd_pcm_runtime_t *runtime = substream->runtime;
741 	ca0106_pcm_t *epcm = runtime->private_data;
742 	int channel = epcm->channel_id;
743 	int result = 0;
744 
745 	switch (cmd) {
746 	case SNDRV_PCM_TRIGGER_START:
747 		snd_ca0106_ptr_write(emu, EXTENDED_INT_MASK, 0, snd_ca0106_ptr_read(emu, EXTENDED_INT_MASK, 0) | (0x110000<<channel));
748 		snd_ca0106_ptr_write(emu, BASIC_INTERRUPT, 0, snd_ca0106_ptr_read(emu, BASIC_INTERRUPT, 0)|(0x100<<channel));
749 		epcm->running = 1;
750 		break;
751 	case SNDRV_PCM_TRIGGER_STOP:
752 		snd_ca0106_ptr_write(emu, BASIC_INTERRUPT, 0, snd_ca0106_ptr_read(emu, BASIC_INTERRUPT, 0) & ~(0x100<<channel));
753 		snd_ca0106_ptr_write(emu, EXTENDED_INT_MASK, 0, snd_ca0106_ptr_read(emu, EXTENDED_INT_MASK, 0) & ~(0x110000<<channel));
754 		epcm->running = 0;
755 		break;
756 	default:
757 		result = -EINVAL;
758 		break;
759 	}
760 	return result;
761 }
762 
763 /* pointer_playback callback */
764 static snd_pcm_uframes_t
765 snd_ca0106_pcm_pointer_playback(snd_pcm_substream_t *substream)
766 {
767 	ca0106_t *emu = snd_pcm_substream_chip(substream);
768 	snd_pcm_runtime_t *runtime = substream->runtime;
769 	ca0106_pcm_t *epcm = runtime->private_data;
770 	snd_pcm_uframes_t ptr, ptr1, ptr2,ptr3,ptr4 = 0;
771 	int channel = epcm->channel_id;
772 
773 	if (!epcm->running)
774 		return 0;
775 
776 	ptr3 = snd_ca0106_ptr_read(emu, PLAYBACK_LIST_PTR, channel);
777 	ptr1 = snd_ca0106_ptr_read(emu, PLAYBACK_POINTER, channel);
778 	ptr4 = snd_ca0106_ptr_read(emu, PLAYBACK_LIST_PTR, channel);
779 	if (ptr3 != ptr4) ptr1 = snd_ca0106_ptr_read(emu, PLAYBACK_POINTER, channel);
780 	ptr2 = bytes_to_frames(runtime, ptr1);
781 	ptr2+= (ptr4 >> 3) * runtime->period_size;
782 	ptr=ptr2;
783         if (ptr >= runtime->buffer_size)
784 		ptr -= runtime->buffer_size;
785 	//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);
786 
787 	return ptr;
788 }
789 
790 /* pointer_capture callback */
791 static snd_pcm_uframes_t
792 snd_ca0106_pcm_pointer_capture(snd_pcm_substream_t *substream)
793 {
794 	ca0106_t *emu = snd_pcm_substream_chip(substream);
795 	snd_pcm_runtime_t *runtime = substream->runtime;
796 	ca0106_pcm_t *epcm = runtime->private_data;
797 	snd_pcm_uframes_t ptr, ptr1, ptr2 = 0;
798 	int channel = channel=epcm->channel_id;
799 
800 	if (!epcm->running)
801 		return 0;
802 
803 	ptr1 = snd_ca0106_ptr_read(emu, CAPTURE_POINTER, channel);
804 	ptr2 = bytes_to_frames(runtime, ptr1);
805 	ptr=ptr2;
806         if (ptr >= runtime->buffer_size)
807 		ptr -= runtime->buffer_size;
808 	//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);
809 
810 	return ptr;
811 }
812 
813 /* operators */
814 static snd_pcm_ops_t snd_ca0106_playback_front_ops = {
815 	.open =        snd_ca0106_pcm_open_playback_front,
816 	.close =       snd_ca0106_pcm_close_playback,
817 	.ioctl =       snd_pcm_lib_ioctl,
818 	.hw_params =   snd_ca0106_pcm_hw_params_playback,
819 	.hw_free =     snd_ca0106_pcm_hw_free_playback,
820 	.prepare =     snd_ca0106_pcm_prepare_playback,
821 	.trigger =     snd_ca0106_pcm_trigger_playback,
822 	.pointer =     snd_ca0106_pcm_pointer_playback,
823 };
824 
825 static snd_pcm_ops_t snd_ca0106_capture_0_ops = {
826 	.open =        snd_ca0106_pcm_open_0_capture,
827 	.close =       snd_ca0106_pcm_close_capture,
828 	.ioctl =       snd_pcm_lib_ioctl,
829 	.hw_params =   snd_ca0106_pcm_hw_params_capture,
830 	.hw_free =     snd_ca0106_pcm_hw_free_capture,
831 	.prepare =     snd_ca0106_pcm_prepare_capture,
832 	.trigger =     snd_ca0106_pcm_trigger_capture,
833 	.pointer =     snd_ca0106_pcm_pointer_capture,
834 };
835 
836 static snd_pcm_ops_t snd_ca0106_capture_1_ops = {
837 	.open =        snd_ca0106_pcm_open_1_capture,
838 	.close =       snd_ca0106_pcm_close_capture,
839 	.ioctl =       snd_pcm_lib_ioctl,
840 	.hw_params =   snd_ca0106_pcm_hw_params_capture,
841 	.hw_free =     snd_ca0106_pcm_hw_free_capture,
842 	.prepare =     snd_ca0106_pcm_prepare_capture,
843 	.trigger =     snd_ca0106_pcm_trigger_capture,
844 	.pointer =     snd_ca0106_pcm_pointer_capture,
845 };
846 
847 static snd_pcm_ops_t snd_ca0106_capture_2_ops = {
848 	.open =        snd_ca0106_pcm_open_2_capture,
849 	.close =       snd_ca0106_pcm_close_capture,
850 	.ioctl =       snd_pcm_lib_ioctl,
851 	.hw_params =   snd_ca0106_pcm_hw_params_capture,
852 	.hw_free =     snd_ca0106_pcm_hw_free_capture,
853 	.prepare =     snd_ca0106_pcm_prepare_capture,
854 	.trigger =     snd_ca0106_pcm_trigger_capture,
855 	.pointer =     snd_ca0106_pcm_pointer_capture,
856 };
857 
858 static snd_pcm_ops_t snd_ca0106_capture_3_ops = {
859 	.open =        snd_ca0106_pcm_open_3_capture,
860 	.close =       snd_ca0106_pcm_close_capture,
861 	.ioctl =       snd_pcm_lib_ioctl,
862 	.hw_params =   snd_ca0106_pcm_hw_params_capture,
863 	.hw_free =     snd_ca0106_pcm_hw_free_capture,
864 	.prepare =     snd_ca0106_pcm_prepare_capture,
865 	.trigger =     snd_ca0106_pcm_trigger_capture,
866 	.pointer =     snd_ca0106_pcm_pointer_capture,
867 };
868 
869 static snd_pcm_ops_t snd_ca0106_playback_center_lfe_ops = {
870         .open =         snd_ca0106_pcm_open_playback_center_lfe,
871         .close =        snd_ca0106_pcm_close_playback,
872         .ioctl =        snd_pcm_lib_ioctl,
873         .hw_params =    snd_ca0106_pcm_hw_params_playback,
874         .hw_free =      snd_ca0106_pcm_hw_free_playback,
875         .prepare =      snd_ca0106_pcm_prepare_playback,
876         .trigger =      snd_ca0106_pcm_trigger_playback,
877         .pointer =      snd_ca0106_pcm_pointer_playback,
878 };
879 
880 static snd_pcm_ops_t snd_ca0106_playback_unknown_ops = {
881         .open =         snd_ca0106_pcm_open_playback_unknown,
882         .close =        snd_ca0106_pcm_close_playback,
883         .ioctl =        snd_pcm_lib_ioctl,
884         .hw_params =    snd_ca0106_pcm_hw_params_playback,
885         .hw_free =      snd_ca0106_pcm_hw_free_playback,
886         .prepare =      snd_ca0106_pcm_prepare_playback,
887         .trigger =      snd_ca0106_pcm_trigger_playback,
888         .pointer =      snd_ca0106_pcm_pointer_playback,
889 };
890 
891 static snd_pcm_ops_t snd_ca0106_playback_rear_ops = {
892         .open =         snd_ca0106_pcm_open_playback_rear,
893         .close =        snd_ca0106_pcm_close_playback,
894         .ioctl =        snd_pcm_lib_ioctl,
895         .hw_params =    snd_ca0106_pcm_hw_params_playback,
896 		.hw_free =      snd_ca0106_pcm_hw_free_playback,
897         .prepare =      snd_ca0106_pcm_prepare_playback,
898         .trigger =      snd_ca0106_pcm_trigger_playback,
899         .pointer =      snd_ca0106_pcm_pointer_playback,
900 };
901 
902 
903 static unsigned short snd_ca0106_ac97_read(ac97_t *ac97,
904 					     unsigned short reg)
905 {
906 	ca0106_t *emu = ac97->private_data;
907 	unsigned long flags;
908 	unsigned short val;
909 
910 	spin_lock_irqsave(&emu->emu_lock, flags);
911 	outb(reg, emu->port + AC97ADDRESS);
912 	val = inw(emu->port + AC97DATA);
913 	spin_unlock_irqrestore(&emu->emu_lock, flags);
914 	return val;
915 }
916 
917 static void snd_ca0106_ac97_write(ac97_t *ac97,
918 				    unsigned short reg, unsigned short val)
919 {
920 	ca0106_t *emu = ac97->private_data;
921 	unsigned long flags;
922 
923 	spin_lock_irqsave(&emu->emu_lock, flags);
924 	outb(reg, emu->port + AC97ADDRESS);
925 	outw(val, emu->port + AC97DATA);
926 	spin_unlock_irqrestore(&emu->emu_lock, flags);
927 }
928 
929 static int snd_ca0106_ac97(ca0106_t *chip)
930 {
931 	ac97_bus_t *pbus;
932 	ac97_template_t ac97;
933 	int err;
934 	static ac97_bus_ops_t ops = {
935 		.write = snd_ca0106_ac97_write,
936 		.read = snd_ca0106_ac97_read,
937 	};
938 
939 	if ((err = snd_ac97_bus(chip->card, 0, &ops, NULL, &pbus)) < 0)
940 		return err;
941 	pbus->no_vra = 1; /* we don't need VRA */
942 
943 	memset(&ac97, 0, sizeof(ac97));
944 	ac97.private_data = chip;
945 	ac97.scaps = AC97_SCAP_NO_SPDIF;
946 	return snd_ac97_mixer(pbus, &ac97, &chip->ac97);
947 }
948 
949 static int snd_ca0106_free(ca0106_t *chip)
950 {
951 	if (chip->res_port != NULL) {    /* avoid access to already used hardware */
952 		// disable interrupts
953 		snd_ca0106_ptr_write(chip, BASIC_INTERRUPT, 0, 0);
954 		outl(0, chip->port + INTE);
955 		snd_ca0106_ptr_write(chip, EXTENDED_INT_MASK, 0, 0);
956 		udelay(1000);
957 		// disable audio
958 		//outl(HCFG_LOCKSOUNDCACHE, chip->port + HCFG);
959 		outl(0, chip->port + HCFG);
960 		/* FIXME: We need to stop and DMA transfers here.
961 		 *        But as I am not sure how yet, we cannot from the dma pages.
962 		 * So we can fix: snd-malloc: Memory leak?  pages not freed = 8
963 		 */
964 	}
965 	// release the data
966 #if 1
967 	if (chip->buffer.area)
968 		snd_dma_free_pages(&chip->buffer);
969 #endif
970 
971 	// release the i/o port
972 	if (chip->res_port) {
973 		release_resource(chip->res_port);
974 		kfree_nocheck(chip->res_port);
975 	}
976 	// release the irq
977 	if (chip->irq >= 0)
978 		free_irq(chip->irq, (void *)chip);
979 	pci_disable_device(chip->pci);
980 	kfree(chip);
981 	return 0;
982 }
983 
984 static int snd_ca0106_dev_free(snd_device_t *device)
985 {
986 	ca0106_t *chip = device->device_data;
987 	return snd_ca0106_free(chip);
988 }
989 
990 static irqreturn_t snd_ca0106_interrupt(int irq, void *dev_id,
991 					  struct pt_regs *regs)
992 {
993 	unsigned int status;
994 
995 	ca0106_t *chip = dev_id;
996 	int i;
997 	int mask;
998         unsigned int stat76;
999 	ca0106_channel_t *pchannel;
1000 
1001 	spin_lock(&chip->emu_lock);
1002 
1003 	status = inl(chip->port + IPR);
1004 
1005 	// call updater, unlock before it
1006 	spin_unlock(&chip->emu_lock);
1007 
1008 	if (! status)
1009 		return IRQ_NONE;
1010 
1011         stat76 = snd_ca0106_ptr_read(chip, EXTENDED_INT, 0);
1012 	//snd_printk("interrupt status = 0x%08x, stat76=0x%08x\n", status, stat76);
1013 	//snd_printk("ptr=0x%08x\n",snd_ca0106_ptr_read(chip, PLAYBACK_POINTER, 0));
1014         mask = 0x11; /* 0x1 for one half, 0x10 for the other half period. */
1015 	for(i = 0; i < 4; i++) {
1016 		pchannel = &(chip->playback_channels[i]);
1017 		if(stat76 & mask) {
1018 /* FIXME: Select the correct substream for period elapsed */
1019 			if(pchannel->use) {
1020                           snd_pcm_period_elapsed(pchannel->epcm->substream);
1021 	                //printk(KERN_INFO "interrupt [%d] used\n", i);
1022                         }
1023 		}
1024 	        //printk(KERN_INFO "channel=%p\n",pchannel);
1025 	        //printk(KERN_INFO "interrupt stat76[%d] = %08x, use=%d, channel=%d\n", i, stat76, pchannel->use, pchannel->number);
1026 		mask <<= 1;
1027 	}
1028         mask = 0x110000; /* 0x1 for one half, 0x10 for the other half period. */
1029 	for(i = 0; i < 4; i++) {
1030 		pchannel = &(chip->capture_channels[i]);
1031 		if(stat76 & mask) {
1032 /* FIXME: Select the correct substream for period elapsed */
1033 			if(pchannel->use) {
1034                           snd_pcm_period_elapsed(pchannel->epcm->substream);
1035 	                //printk(KERN_INFO "interrupt [%d] used\n", i);
1036                         }
1037 		}
1038 	        //printk(KERN_INFO "channel=%p\n",pchannel);
1039 	        //printk(KERN_INFO "interrupt stat76[%d] = %08x, use=%d, channel=%d\n", i, stat76, pchannel->use, pchannel->number);
1040 		mask <<= 1;
1041 	}
1042 
1043         snd_ca0106_ptr_write(chip, EXTENDED_INT, 0, stat76);
1044 	spin_lock(&chip->emu_lock);
1045 	// acknowledge the interrupt if necessary
1046 	outl(status, chip->port+IPR);
1047 
1048 	spin_unlock(&chip->emu_lock);
1049 
1050 	return IRQ_HANDLED;
1051 }
1052 
1053 static void snd_ca0106_pcm_free(snd_pcm_t *pcm)
1054 {
1055 	ca0106_t *emu = pcm->private_data;
1056 	emu->pcm = NULL;
1057 	snd_pcm_lib_preallocate_free_for_all(pcm);
1058 }
1059 
1060 static int __devinit snd_ca0106_pcm(ca0106_t *emu, int device, snd_pcm_t **rpcm)
1061 {
1062 	snd_pcm_t *pcm;
1063 	snd_pcm_substream_t *substream;
1064 	int err;
1065 
1066 	if (rpcm)
1067 		*rpcm = NULL;
1068 	if ((err = snd_pcm_new(emu->card, "ca0106", device, 1, 1, &pcm)) < 0)
1069 		return err;
1070 
1071 	pcm->private_data = emu;
1072 	pcm->private_free = snd_ca0106_pcm_free;
1073 
1074 	switch (device) {
1075 	case 0:
1076 	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_front_ops);
1077 	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_0_ops);
1078           break;
1079 	case 1:
1080 	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_rear_ops);
1081 	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_1_ops);
1082           break;
1083 	case 2:
1084 	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_center_lfe_ops);
1085 	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_2_ops);
1086           break;
1087 	case 3:
1088 	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ca0106_playback_unknown_ops);
1089 	  snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ca0106_capture_3_ops);
1090           break;
1091         }
1092 
1093 	pcm->info_flags = 0;
1094 	pcm->dev_subclass = SNDRV_PCM_SUBCLASS_GENERIC_MIX;
1095 	strcpy(pcm->name, "CA0106");
1096 	emu->pcm = pcm;
1097 
1098 	for(substream = pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream;
1099 	    substream;
1100 	    substream = substream->next) {
1101 		if ((err = snd_pcm_lib_preallocate_pages(substream,
1102 							 SNDRV_DMA_TYPE_DEV,
1103 							 snd_dma_pci_data(emu->pci),
1104 							 64*1024, 64*1024)) < 0) /* FIXME: 32*1024 for sound buffer, between 32and64 for Periods table. */
1105 			return err;
1106 	}
1107 
1108 	for (substream = pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream;
1109 	      substream;
1110 	      substream = substream->next) {
1111  		if ((err = snd_pcm_lib_preallocate_pages(substream,
1112 	                                           SNDRV_DMA_TYPE_DEV,
1113 	                                           snd_dma_pci_data(emu->pci),
1114 	                                           64*1024, 64*1024)) < 0)
1115 			return err;
1116 	}
1117 
1118 	if (rpcm)
1119 		*rpcm = pcm;
1120 
1121 	return 0;
1122 }
1123 
1124 static int __devinit snd_ca0106_create(snd_card_t *card,
1125 					 struct pci_dev *pci,
1126 					 ca0106_t **rchip)
1127 {
1128 	ca0106_t *chip;
1129 	ca0106_details_t *c;
1130 	int err;
1131 	int ch;
1132 	static snd_device_ops_t ops = {
1133 		.dev_free = snd_ca0106_dev_free,
1134 	};
1135 
1136 	*rchip = NULL;
1137 
1138 	if ((err = pci_enable_device(pci)) < 0)
1139 		return err;
1140 	if (pci_set_dma_mask(pci, DMA_32BIT_MASK) < 0 ||
1141 	    pci_set_consistent_dma_mask(pci, DMA_32BIT_MASK) < 0) {
1142 		printk(KERN_ERR "error to set 32bit mask DMA\n");
1143 		pci_disable_device(pci);
1144 		return -ENXIO;
1145 	}
1146 
1147 	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1148 	if (chip == NULL) {
1149 		pci_disable_device(pci);
1150 		return -ENOMEM;
1151 	}
1152 
1153 	chip->card = card;
1154 	chip->pci = pci;
1155 	chip->irq = -1;
1156 
1157 	spin_lock_init(&chip->emu_lock);
1158 
1159 	chip->port = pci_resource_start(pci, 0);
1160 	if ((chip->res_port = request_region(chip->port, 0x20,
1161 					     "snd_ca0106")) == NULL) {
1162 		snd_ca0106_free(chip);
1163 		printk(KERN_ERR "cannot allocate the port\n");
1164 		return -EBUSY;
1165 	}
1166 
1167 	if (request_irq(pci->irq, snd_ca0106_interrupt,
1168 			SA_INTERRUPT|SA_SHIRQ, "snd_ca0106",
1169 			(void *)chip)) {
1170 		snd_ca0106_free(chip);
1171 		printk(KERN_ERR "cannot grab irq\n");
1172 		return -EBUSY;
1173 	}
1174 	chip->irq = pci->irq;
1175 
1176  	/* This stores the periods table. */
1177 	if(snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(pci), 1024, &chip->buffer) < 0) {
1178 		snd_ca0106_free(chip);
1179 		return -ENOMEM;
1180 	}
1181 
1182 	pci_set_master(pci);
1183 	/* read revision & serial */
1184 	pci_read_config_byte(pci, PCI_REVISION_ID, (char *)&chip->revision);
1185 	pci_read_config_dword(pci, PCI_SUBSYSTEM_VENDOR_ID, &chip->serial);
1186 	pci_read_config_word(pci, PCI_SUBSYSTEM_ID, &chip->model);
1187 #if 1
1188 	printk(KERN_INFO "Model %04x Rev %08x Serial %08x\n", chip->model,
1189 	       chip->revision, chip->serial);
1190 #endif
1191 	strcpy(card->driver, "CA0106");
1192 	strcpy(card->shortname, "CA0106");
1193 
1194 	for (c=ca0106_chip_details; c->serial; c++) {
1195 		if (c->serial == chip->serial) break;
1196 	}
1197 	chip->details = c;
1198 	sprintf(card->longname, "%s at 0x%lx irq %i",
1199 		c->name, chip->port, chip->irq);
1200 
1201 	outl(0, chip->port + INTE);
1202 
1203 	/*
1204 	 *  Init to 0x02109204 :
1205 	 *  Clock accuracy    = 0     (1000ppm)
1206 	 *  Sample Rate       = 2     (48kHz)
1207 	 *  Audio Channel     = 1     (Left of 2)
1208 	 *  Source Number     = 0     (Unspecified)
1209 	 *  Generation Status = 1     (Original for Cat Code 12)
1210 	 *  Cat Code          = 12    (Digital Signal Mixer)
1211 	 *  Mode              = 0     (Mode 0)
1212 	 *  Emphasis          = 0     (None)
1213 	 *  CP                = 1     (Copyright unasserted)
1214 	 *  AN                = 0     (Audio data)
1215 	 *  P                 = 0     (Consumer)
1216 	 */
1217 	snd_ca0106_ptr_write(chip, SPCS0, 0,
1218 				chip->spdif_bits[0] =
1219 				SPCS_CLKACCY_1000PPM | SPCS_SAMPLERATE_48 |
1220 				SPCS_CHANNELNUM_LEFT | SPCS_SOURCENUM_UNSPEC |
1221 				SPCS_GENERATIONSTATUS | 0x00001200 |
1222 				0x00000000 | SPCS_EMPHASIS_NONE | SPCS_COPYRIGHT);
1223 	/* Only SPCS1 has been tested */
1224 	snd_ca0106_ptr_write(chip, SPCS1, 0,
1225 				chip->spdif_bits[1] =
1226 				SPCS_CLKACCY_1000PPM | SPCS_SAMPLERATE_48 |
1227 				SPCS_CHANNELNUM_LEFT | SPCS_SOURCENUM_UNSPEC |
1228 				SPCS_GENERATIONSTATUS | 0x00001200 |
1229 				0x00000000 | SPCS_EMPHASIS_NONE | SPCS_COPYRIGHT);
1230 	snd_ca0106_ptr_write(chip, SPCS2, 0,
1231 				chip->spdif_bits[2] =
1232 				SPCS_CLKACCY_1000PPM | SPCS_SAMPLERATE_48 |
1233 				SPCS_CHANNELNUM_LEFT | SPCS_SOURCENUM_UNSPEC |
1234 				SPCS_GENERATIONSTATUS | 0x00001200 |
1235 				0x00000000 | SPCS_EMPHASIS_NONE | SPCS_COPYRIGHT);
1236 	snd_ca0106_ptr_write(chip, SPCS3, 0,
1237 				chip->spdif_bits[3] =
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 
1243         snd_ca0106_ptr_write(chip, PLAYBACK_MUTE, 0, 0x00fc0000);
1244         snd_ca0106_ptr_write(chip, CAPTURE_MUTE, 0, 0x00fc0000);
1245 
1246         /* Write 0x8000 to AC97_REC_GAIN to mute it. */
1247         outb(AC97_REC_GAIN, chip->port + AC97ADDRESS);
1248         outw(0x8000, chip->port + AC97DATA);
1249 #if 0
1250 	snd_ca0106_ptr_write(chip, SPCS0, 0, 0x2108006);
1251 	snd_ca0106_ptr_write(chip, 0x42, 0, 0x2108006);
1252 	snd_ca0106_ptr_write(chip, 0x43, 0, 0x2108006);
1253 	snd_ca0106_ptr_write(chip, 0x44, 0, 0x2108006);
1254 #endif
1255 
1256 	//snd_ca0106_ptr_write(chip, SPDIF_SELECT2, 0, 0xf0f003f); /* OSS drivers set this. */
1257 	/* Analog or Digital output */
1258 	snd_ca0106_ptr_write(chip, SPDIF_SELECT1, 0, 0xf);
1259 	snd_ca0106_ptr_write(chip, SPDIF_SELECT2, 0, 0x000f0000); /* 0x0b000000 for digital, 0x000b0000 for analog, from win2000 drivers. Use 0x000f0000 for surround71 */
1260 	chip->spdif_enable = 0; /* Set digital SPDIF output off */
1261 	chip->capture_source = 3; /* Set CAPTURE_SOURCE */
1262 	//snd_ca0106_ptr_write(chip, 0x45, 0, 0); /* Analogue out */
1263 	//snd_ca0106_ptr_write(chip, 0x45, 0, 0xf00); /* Digital out */
1264 
1265 	snd_ca0106_ptr_write(chip, CAPTURE_CONTROL, 0, 0x40c81000); /* goes to 0x40c80000 when doing SPDIF IN/OUT */
1266 	snd_ca0106_ptr_write(chip, CAPTURE_CONTROL, 1, 0xffffffff); /* (Mute) CAPTURE feedback into PLAYBACK volume. Only lower 16 bits matter. */
1267 	snd_ca0106_ptr_write(chip, CAPTURE_CONTROL, 2, 0x30300000); /* SPDIF IN Volume */
1268 	snd_ca0106_ptr_write(chip, CAPTURE_CONTROL, 3, 0x00700000); /* SPDIF IN Volume, 0x70 = (vol & 0x3f) | 0x40 */
1269 	snd_ca0106_ptr_write(chip, PLAYBACK_ROUTING1, 0, 0x32765410);
1270 	snd_ca0106_ptr_write(chip, PLAYBACK_ROUTING2, 0, 0x76767676);
1271 	snd_ca0106_ptr_write(chip, CAPTURE_ROUTING1, 0, 0x32765410);
1272 	snd_ca0106_ptr_write(chip, CAPTURE_ROUTING2, 0, 0x76767676);
1273 	for(ch = 0; ch < 4; ch++) {
1274 		snd_ca0106_ptr_write(chip, CAPTURE_VOLUME1, ch, 0x30303030); /* Only high 16 bits matter */
1275 		snd_ca0106_ptr_write(chip, CAPTURE_VOLUME2, ch, 0x30303030);
1276 		//snd_ca0106_ptr_write(chip, PLAYBACK_VOLUME1, ch, 0x40404040); /* Mute */
1277 		//snd_ca0106_ptr_write(chip, PLAYBACK_VOLUME2, ch, 0x40404040); /* Mute */
1278 		snd_ca0106_ptr_write(chip, PLAYBACK_VOLUME1, ch, 0xffffffff); /* Mute */
1279 		snd_ca0106_ptr_write(chip, PLAYBACK_VOLUME2, ch, 0xffffffff); /* Mute */
1280 	}
1281         snd_ca0106_ptr_write(chip, CAPTURE_SOURCE, 0x0, 0x333300e4); /* Select MIC, Line in, TAD in, AUX in */
1282 	chip->capture_source = 3; /* Set CAPTURE_SOURCE */
1283 
1284         if (chip->details->gpio_type == 1) { /* The SB0410 and SB0413 use GPIO differently. */
1285 		/* FIXME: Still need to find out what the other GPIO bits do. E.g. For digital spdif out. */
1286 		outl(0x0, chip->port+GPIO);
1287 		//outl(0x00f0e000, chip->port+GPIO); /* Analog */
1288 		outl(0x005f5301, chip->port+GPIO); /* Analog */
1289 	} else {
1290 		outl(0x0, chip->port+GPIO);
1291 		outl(0x005f03a3, chip->port+GPIO); /* Analog */
1292 		//outl(0x005f02a2, chip->port+GPIO);   /* SPDIF */
1293 	}
1294 	snd_ca0106_intr_enable(chip, 0x105); /* Win2000 uses 0x1e0 */
1295 
1296 	//outl(HCFG_LOCKSOUNDCACHE|HCFG_AUDIOENABLE, chip->port+HCFG);
1297 	//outl(0x00001409, chip->port+HCFG); /* 0x1000 causes AC3 to fails. Maybe it effects 24 bit output. */
1298 	//outl(0x00000009, chip->port+HCFG);
1299 	outl(HCFG_AC97 | HCFG_AUDIOENABLE, chip->port+HCFG); /* AC97 2.0, Enable outputs. */
1300 
1301         if (chip->details->i2c_adc == 1) { /* The SB0410 and SB0413 use I2C to control ADC. */
1302 	        snd_ca0106_i2c_write(chip, ADC_MUX, ADC_MUX_LINEIN); /* Enable Line-in capture. MIC in currently untested. */
1303 	}
1304 
1305 	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
1306 				  chip, &ops)) < 0) {
1307 		snd_ca0106_free(chip);
1308 		return err;
1309 	}
1310 	*rchip = chip;
1311 	return 0;
1312 }
1313 
1314 static int __devinit snd_ca0106_probe(struct pci_dev *pci,
1315 					const struct pci_device_id *pci_id)
1316 {
1317 	static int dev;
1318 	snd_card_t *card;
1319 	ca0106_t *chip;
1320 	int err;
1321 
1322 	if (dev >= SNDRV_CARDS)
1323 		return -ENODEV;
1324 	if (!enable[dev]) {
1325 		dev++;
1326 		return -ENOENT;
1327 	}
1328 
1329 	card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
1330 	if (card == NULL)
1331 		return -ENOMEM;
1332 
1333 	if ((err = snd_ca0106_create(card, pci, &chip)) < 0) {
1334 		snd_card_free(card);
1335 		return err;
1336 	}
1337 
1338 	if ((err = snd_ca0106_pcm(chip, 0, NULL)) < 0) {
1339 		snd_card_free(card);
1340 		return err;
1341 	}
1342 	if ((err = snd_ca0106_pcm(chip, 1, NULL)) < 0) {
1343 		snd_card_free(card);
1344 		return err;
1345 	}
1346 	if ((err = snd_ca0106_pcm(chip, 2, NULL)) < 0) {
1347 		snd_card_free(card);
1348 		return err;
1349 	}
1350 	if ((err = snd_ca0106_pcm(chip, 3, NULL)) < 0) {
1351 		snd_card_free(card);
1352 		return err;
1353 	}
1354         if (chip->details->ac97 == 1) { /* The SB0410 and SB0413 do not have an AC97 chip. */
1355 		if ((err = snd_ca0106_ac97(chip)) < 0) {
1356 			snd_card_free(card);
1357 			return err;
1358 		}
1359 	}
1360 	if ((err = snd_ca0106_mixer(chip)) < 0) {
1361 		snd_card_free(card);
1362 		return err;
1363 	}
1364 
1365 	snd_ca0106_proc_init(chip);
1366 
1367 	if ((err = snd_card_register(card)) < 0) {
1368 		snd_card_free(card);
1369 		return err;
1370 	}
1371 
1372 	pci_set_drvdata(pci, card);
1373 	dev++;
1374 	return 0;
1375 }
1376 
1377 static void __devexit snd_ca0106_remove(struct pci_dev *pci)
1378 {
1379 	snd_card_free(pci_get_drvdata(pci));
1380 	pci_set_drvdata(pci, NULL);
1381 }
1382 
1383 // PCI IDs
1384 static struct pci_device_id snd_ca0106_ids[] = {
1385 	{ 0x1102, 0x0007, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },	/* Audigy LS or Live 24bit */
1386 	{ 0, }
1387 };
1388 MODULE_DEVICE_TABLE(pci, snd_ca0106_ids);
1389 
1390 // pci_driver definition
1391 static struct pci_driver driver = {
1392 	.name = "CA0106",
1393 	.owner = THIS_MODULE,
1394 	.id_table = snd_ca0106_ids,
1395 	.probe = snd_ca0106_probe,
1396 	.remove = __devexit_p(snd_ca0106_remove),
1397 };
1398 
1399 // initialization of the module
1400 static int __init alsa_card_ca0106_init(void)
1401 {
1402 	int err;
1403 
1404 	if ((err = pci_register_driver(&driver)) > 0)
1405 		return err;
1406 
1407 	return 0;
1408 }
1409 
1410 // clean up the module
1411 static void __exit alsa_card_ca0106_exit(void)
1412 {
1413 	pci_unregister_driver(&driver);
1414 }
1415 
1416 module_init(alsa_card_ca0106_init)
1417 module_exit(alsa_card_ca0106_exit)
1418