aboutsummaryrefslogblamecommitdiffstats
path: root/sound/pci/via82xx.c
blob: 819f27b2762b0063b3cfaab1600525525c33c3f4 (plain) (tree)
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486






































































































                                                                                      
                                                                                                                                                    







































































































































































































                                                                                                      
                         













































































                                                                                
                                                                              












































































































                                                                                                                  

                              





















































                                                                                                                     
                    






















































































































































































































































































































































































                                                                                                                                                                                                                                                                             
                                                              


                         
                                                                           
                                    
                         

                                                                        


                                                                         











































































































































                                                                                                                    





                                                                


















































































































































































































































































































































































































                                                                                                                            
                                                             







































































                                                                                               

                                    




                                                     

                                    



                                         

                                    



                                         

                                    



                                         

                                    



                                                            

                                    



                                          

                                    



                                          

                                    
















































































































































































































































                                                                                                                
                                                 

                         
                               








































                                                                                        
                                                   





                                                                          
                                                 







                                                                                                   
                                                   









                                                                                                   
                                                 






























































































































































































































                                                                                                         

                                  






                                                        




                                                                                                                 
                                                                                                                




                                                                                                                                         
                                                                                                                                 












                                                                                                                  
                                                                                                        




                                                                                                             
                                                                                                          






                                                                                                                                
                                                                                                                  
                                                                                                                                     








                                                                              

                                                     

                                 
                                                                         

                                                 
                                                             







                                                                                         
                                                                       
                                                                               
                                                                                      























































































                                                                                                   



                                                                   













































                                                                                      
                                            








                                               
/*
 *   ALSA driver for VIA VT82xx (South Bridge)
 *
 *   VT82C686A/B/C, VT8233A/C, VT8235
 *
 *	Copyright (c) 2000 Jaroslav Kysela <perex@suse.cz>
 *	                   Tjeerd.Mulder <Tjeerd.Mulder@fujitsu-siemens.com>
 *                    2002 Takashi Iwai <tiwai@suse.de>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 *
 */

/*
 * Changes:
 *
 * Dec. 19, 2002	Takashi Iwai <tiwai@suse.de>
 *	- use the DSX channels for the first pcm playback.
 *	  (on VIA8233, 8233C and 8235 only)
 *	  this will allow you play simultaneously up to 4 streams.
 *	  multi-channel playback is assigned to the second device
 *	  on these chips.
 *	- support the secondary capture (on VIA8233/C,8235)
 *	- SPDIF support
 *	  the DSX3 channel can be used for SPDIF output.
 *	  on VIA8233A, this channel is assigned to the second pcm
 *	  playback.
 *	  the card config of alsa-lib will assign the correct
 *	  device for applications.
 *	- clean up the code, separate low-level initialization
 *	  routines for each chipset.
 */

#include <sound/driver.h>
#include <asm/io.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/gameport.h>
#include <linux/moduleparam.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/info.h>
#include <sound/ac97_codec.h>
#include <sound/mpu401.h>
#include <sound/initval.h>

#if 0
#define POINTER_DEBUG
#endif

MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
MODULE_DESCRIPTION("VIA VT82xx audio");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{VIA,VT82C686A/B/C,pci},{VIA,VT8233A/C,8235}}");

#if defined(CONFIG_GAMEPORT) || (defined(MODULE) && defined(CONFIG_GAMEPORT_MODULE))
#define SUPPORT_JOYSTICK 1
#endif

static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;	/* Index 0-MAX */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;	/* ID for this card */
static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;	/* Enable this card */
static long mpu_port[SNDRV_CARDS];
#ifdef SUPPORT_JOYSTICK
static int joystick[SNDRV_CARDS];
#endif
static int ac97_clock[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 48000};
static char *ac97_quirk[SNDRV_CARDS];
static int dxs_support[SNDRV_CARDS];

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable audio part of VIA 82xx bridge.");
module_param_array(mpu_port, long, NULL, 0444);
MODULE_PARM_DESC(mpu_port, "MPU-401 port. (VT82C686x only)");
#ifdef SUPPORT_JOYSTICK
module_param_array(joystick, bool, NULL, 0444);
MODULE_PARM_DESC(joystick, "Enable joystick. (VT82C686x only)");
#endif
module_param_array(ac97_clock, int, NULL, 0444);
MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
module_param_array(ac97_quirk, charp, NULL, 0444);
MODULE_PARM_DESC(ac97_quirk, "AC'97 workaround for strange hardware.");
module_param_array(dxs_support, int, NULL, 0444);
MODULE_PARM_DESC(dxs_support, "Support for DXS channels (0 = auto, 1 = enable, 2 = disable, 3 = 48k only, 4 = no VRA, 5 = enable any sample rate)");


/* pci ids */
#ifndef PCI_DEVICE_ID_VIA_82C686_5
#define PCI_DEVICE_ID_VIA_82C686_5	0x3058
#endif
#ifndef PCI_DEVICE_ID_VIA_8233_5
#define PCI_DEVICE_ID_VIA_8233_5	0x3059
#endif

/* revision numbers for via686 */
#define VIA_REV_686_A		0x10
#define VIA_REV_686_B		0x11
#define VIA_REV_686_C		0x12
#define VIA_REV_686_D		0x13
#define VIA_REV_686_E		0x14
#define VIA_REV_686_H		0x20

/* revision numbers for via8233 */
#define VIA_REV_PRE_8233	0x10	/* not in market */
#define VIA_REV_8233C		0x20	/* 2 rec, 4 pb, 1 multi-pb */
#define VIA_REV_8233		0x30	/* 2 rec, 4 pb, 1 multi-pb, spdif */
#define VIA_REV_8233A		0x40	/* 1 rec, 1 multi-pb, spdf */
#define VIA_REV_8235		0x50	/* 2 rec, 4 pb, 1 multi-pb, spdif */
#define VIA_REV_8237		0x60

/*
 *  Direct registers
 */

#define VIAREG(via, x) ((via)->port + VIA_REG_##x)
#define VIADEV_REG(viadev, x) ((viadev)->port + VIA_REG_##x)

/* common offsets */
#define VIA_REG_OFFSET_STATUS		0x00	/* byte - channel status */
#define   VIA_REG_STAT_ACTIVE		0x80	/* RO */
#define   VIA_REG_STAT_PAUSED		0x40	/* RO */
#define   VIA_REG_STAT_TRIGGER_QUEUED	0x08	/* RO */
#define   VIA_REG_STAT_STOPPED		0x04	/* RWC */
#define   VIA_REG_STAT_EOL		0x02	/* RWC */
#define   VIA_REG_STAT_FLAG		0x01	/* RWC */
#define VIA_REG_OFFSET_CONTROL		0x01	/* byte - channel control */
#define   VIA_REG_CTRL_START		0x80	/* WO */
#define   VIA_REG_CTRL_TERMINATE	0x40	/* WO */
#define   VIA_REG_CTRL_AUTOSTART	0x20
#define   VIA_REG_CTRL_PAUSE		0x08	/* RW */
#define   VIA_REG_CTRL_INT_STOP		0x04		
#define   VIA_REG_CTRL_INT_EOL		0x02
#define   VIA_REG_CTRL_INT_FLAG		0x01
#define   VIA_REG_CTRL_RESET		0x01	/* RW - probably reset? undocumented */
#define   VIA_REG_CTRL_INT (VIA_REG_CTRL_INT_FLAG | VIA_REG_CTRL_INT_EOL | VIA_REG_CTRL_AUTOSTART)
#define VIA_REG_OFFSET_TYPE		0x02	/* byte - channel type (686 only) */
#define   VIA_REG_TYPE_AUTOSTART	0x80	/* RW - autostart at EOL */
#define   VIA_REG_TYPE_16BIT		0x20	/* RW */
#define   VIA_REG_TYPE_STEREO		0x10	/* RW */
#define   VIA_REG_TYPE_INT_LLINE	0x00
#define   VIA_REG_TYPE_INT_LSAMPLE	0x04
#define   VIA_REG_TYPE_INT_LESSONE	0x08
#define   VIA_REG_TYPE_INT_MASK		0x0c
#define   VIA_REG_TYPE_INT_EOL		0x02
#define   VIA_REG_TYPE_INT_FLAG		0x01
#define VIA_REG_OFFSET_TABLE_PTR	0x04	/* dword - channel table pointer */
#define VIA_REG_OFFSET_CURR_PTR		0x04	/* dword - channel current pointer */
#define VIA_REG_OFFSET_STOP_IDX		0x08	/* dword - stop index, channel type, sample rate */
#define   VIA8233_REG_TYPE_16BIT	0x00200000	/* RW */
#define   VIA8233_REG_TYPE_STEREO	0x00100000	/* RW */
#define VIA_REG_OFFSET_CURR_COUNT	0x0c	/* dword - channel current count (24 bit) */
#define VIA_REG_OFFSET_CURR_INDEX	0x0f	/* byte - channel current index (for via8233 only) */

#define DEFINE_VIA_REGSET(name,val) \
enum {\
	VIA_REG_##name##_STATUS		= (val),\
	VIA_REG_##name##_CONTROL	= (val) + 0x01,\
	VIA_REG_##name##_TYPE		= (val) + 0x02,\
	VIA_REG_##name##_TABLE_PTR	= (val) + 0x04,\
	VIA_REG_##name##_CURR_PTR	= (val) + 0x04,\
	VIA_REG_##name##_STOP_IDX	= (val) + 0x08,\
	VIA_REG_##name##_CURR_COUNT	= (val) + 0x0c,\
}

/* playback block */
DEFINE_VIA_REGSET(PLAYBACK, 0x00);
DEFINE_VIA_REGSET(CAPTURE, 0x10);
DEFINE_VIA_REGSET(FM, 0x20);

/* AC'97 */
#define VIA_REG_AC97			0x80	/* dword */
#define   VIA_REG_AC97_CODEC_ID_MASK	(3<<30)
#define   VIA_REG_AC97_CODEC_ID_SHIFT	30
#define   VIA_REG_AC97_CODEC_ID_PRIMARY	0x00
#define   VIA_REG_AC97_CODEC_ID_SECONDARY 0x01
#define   VIA_REG_AC97_SECONDARY_VALID	(1<<27)
#define   VIA_REG_AC97_PRIMARY_VALID	(1<<25)
#define   VIA_REG_AC97_BUSY		(1<<24)
#define   VIA_REG_AC97_READ		(1<<23)
#define   VIA_REG_AC97_CMD_SHIFT	16
#define   VIA_REG_AC97_CMD_MASK		0x7e
#define   VIA_REG_AC97_DATA_SHIFT	0
#define   VIA_REG_AC97_DATA_MASK	0xffff

#define VIA_REG_SGD_SHADOW		0x84	/* dword */
/* via686 */
#define   VIA_REG_SGD_STAT_PB_FLAG	(1<<0)
#define   VIA_REG_SGD_STAT_CP_FLAG	(1<<1)
#define   VIA_REG_SGD_STAT_FM_FLAG	(1<<2)
#define   VIA_REG_SGD_STAT_PB_EOL	(1<<4)
#define   VIA_REG_SGD_STAT_CP_EOL	(1<<5)
#define   VIA_REG_SGD_STAT_FM_EOL	(1<<6)
#define   VIA_REG_SGD_STAT_PB_STOP	(1<<8)
#define   VIA_REG_SGD_STAT_CP_STOP	(1<<9)
#define   VIA_REG_SGD_STAT_FM_STOP	(1<<10)
#define   VIA_REG_SGD_STAT_PB_ACTIVE	(1<<12)
#define   VIA_REG_SGD_STAT_CP_ACTIVE	(1<<13)
#define   VIA_REG_SGD_STAT_FM_ACTIVE	(1<<14)
/* via8233 */
#define   VIA8233_REG_SGD_STAT_FLAG	(1<<0)
#define   VIA8233_REG_SGD_STAT_EOL	(1<<1)
#define   VIA8233_REG_SGD_STAT_STOP	(1<<2)
#define   VIA8233_REG_SGD_STAT_ACTIVE	(1<<3)
#define VIA8233_INTR_MASK(chan) ((VIA8233_REG_SGD_STAT_FLAG|VIA8233_REG_SGD_STAT_EOL) << ((chan) * 4))
#define   VIA8233_REG_SGD_CHAN_SDX	0
#define   VIA8233_REG_SGD_CHAN_MULTI	4
#define   VIA8233_REG_SGD_CHAN_REC	6
#define   VIA8233_REG_SGD_CHAN_REC1	7

#define VIA_REG_GPI_STATUS		0x88
#define VIA_REG_GPI_INTR		0x8c

/* multi-channel and capture registers for via8233 */
DEFINE_VIA_REGSET(MULTPLAY, 0x40);
DEFINE_VIA_REGSET(CAPTURE_8233, 0x60);

/* via8233-specific registers */
#define VIA_REG_OFS_PLAYBACK_VOLUME_L	0x02	/* byte */
#define VIA_REG_OFS_PLAYBACK_VOLUME_R	0x03	/* byte */
#define VIA_REG_OFS_MULTPLAY_FORMAT	0x02	/* byte - format and channels */
#define   VIA_REG_MULTPLAY_FMT_8BIT	0x00
#define   VIA_REG_MULTPLAY_FMT_16BIT	0x80
#define   VIA_REG_MULTPLAY_FMT_CH_MASK	0x70	/* # channels << 4 (valid = 1,2,4,6) */
#define VIA_REG_OFS_CAPTURE_FIFO	0x02	/* byte - bit 6 = fifo  enable */
#define   VIA_REG_CAPTURE_FIFO_ENABLE	0x40

#define VIA_DXS_MAX_VOLUME		31	/* max. volume (attenuation) of reg 0x32/33 */

#define VIA_REG_CAPTURE_CHANNEL		0x63	/* byte - input select */
#define   VIA_REG_CAPTURE_CHANNEL_MIC	0x4
#define   VIA_REG_CAPTURE_CHANNEL_LINE	0
#define   VIA_REG_CAPTURE_SELECT_CODEC	0x03	/* recording source codec (0 = primary) */

#define VIA_TBL_BIT_FLAG	0x40000000
#define VIA_TBL_BIT_EOL		0x80000000

/* pci space */
#define VIA_ACLINK_STAT		0x40
#define  VIA_ACLINK_C11_READY	0x20
#define  VIA_ACLINK_C10_READY	0x10
#define  VIA_ACLINK_C01_READY	0x04 /* secondary codec ready */
#define  VIA_ACLINK_LOWPOWER	0x02 /* low-power state */
#define  VIA_ACLINK_C00_READY	0x01 /* primary codec ready */
#define VIA_ACLINK_CTRL		0x41
#define  VIA_ACLINK_CTRL_ENABLE	0x80 /* 0: disable, 1: enable */
#define  VIA_ACLINK_CTRL_RESET	0x40 /* 0: assert, 1: de-assert */
#define  VIA_ACLINK_CTRL_SYNC	0x20 /* 0: release SYNC, 1: force SYNC hi */
#define  VIA_ACLINK_CTRL_SDO	0x10 /* 0: release SDO, 1: force SDO hi */
#define  VIA_ACLINK_CTRL_VRA	0x08 /* 0: disable VRA, 1: enable VRA */
#define  VIA_ACLINK_CTRL_PCM	0x04 /* 0: disable PCM, 1: enable PCM */
#define  VIA_ACLINK_CTRL_FM	0x02 /* via686 only */
#define  VIA_ACLINK_CTRL_SB	0x01 /* via686 only */
#define  VIA_ACLINK_CTRL_INIT	(VIA_ACLINK_CTRL_ENABLE|\
				 VIA_ACLINK_CTRL_RESET|\
				 VIA_ACLINK_CTRL_PCM|\
				 VIA_ACLINK_CTRL_VRA)
#define VIA_FUNC_ENABLE		0x42
#define  VIA_FUNC_MIDI_PNP	0x80 /* FIXME: it's 0x40 in the datasheet! */
#define  VIA_FUNC_MIDI_IRQMASK	0x40 /* FIXME: not documented! */
#define  VIA_FUNC_RX2C_WRITE	0x20
#define  VIA_FUNC_SB_FIFO_EMPTY	0x10
#define  VIA_FUNC_ENABLE_GAME	0x08
#define  VIA_FUNC_ENABLE_FM	0x04
#define  VIA_FUNC_ENABLE_MIDI	0x02
#define  VIA_FUNC_ENABLE_SB	0x01
#define VIA_PNP_CONTROL		0x43
#define VIA_FM_NMI_CTRL		0x48
#define VIA8233_VOLCHG_CTRL	0x48
#define VIA8233_SPDIF_CTRL	0x49
#define  VIA8233_SPDIF_DX3	0x08
#define  VIA8233_SPDIF_SLOT_MASK	0x03
#define  VIA8233_SPDIF_SLOT_1011	0x00
#define  VIA8233_SPDIF_SLOT_34		0x01
#define  VIA8233_SPDIF_SLOT_78		0x02
#define  VIA8233_SPDIF_SLOT_69		0x03

/*
 */

#define VIA_DXS_AUTO	0
#define VIA_DXS_ENABLE	1
#define VIA_DXS_DISABLE	2
#define VIA_DXS_48K	3
#define VIA_DXS_NO_VRA	4
#define VIA_DXS_SRC	5


/*
 */

typedef struct _snd_via82xx via82xx_t;
typedef struct via_dev viadev_t;

/*
 * pcm stream
 */

struct snd_via_sg_table {
	unsigned int offset;
	unsigned int size;
} ;

#define VIA_TABLE_SIZE	255

struct via_dev {
	unsigned int reg_offset;
	unsigned long port;
	int direction;	/* playback = 0, capture = 1 */
        snd_pcm_substream_t *substream;
	int running;
	unsigned int tbl_entries; /* # descriptors */
	struct snd_dma_buffer table;
	struct snd_via_sg_table *idx_table;
	/* for recovery from the unexpected pointer */
	unsigned int lastpos;
	unsigned int fragsize;
	unsigned int bufsize;
	unsigned int bufsize2;
};


enum { TYPE_CARD_VIA686 = 1, TYPE_CARD_VIA8233 };
enum { TYPE_VIA686, TYPE_VIA8233, TYPE_VIA8233A };

#define VIA_MAX_DEVS	7	/* 4 playback, 1 multi, 2 capture */

struct via_rate_lock {
	spinlock_t lock;
	int rate;
	int used;
};

struct _snd_via82xx {
	int irq;

	unsigned long port;
	struct resource *mpu_res;
	int chip_type;
	unsigned char revision;

	unsigned char old_legacy;
	unsigned char old_legacy_cfg;
#ifdef CONFIG_PM
	unsigned char legacy_saved;
	unsigned char legacy_cfg_saved;
	unsigned char spdif_ctrl_saved;
	unsigned char capture_src_saved[2];
	unsigned int mpu_port_saved;
#endif

	unsigned char playback_volume[2]; /* for VIA8233/C/8235; default = 0 */

	unsigned int intr_mask; /* SGD_SHADOW mask to check interrupts */

	struct pci_dev *pci;
	snd_card_t *card;

	unsigned int num_devs;
	unsigned int playback_devno, multi_devno, capture_devno;
	viadev_t devs[VIA_MAX_DEVS];
	struct via_rate_lock rates[2]; /* playback and capture */
	unsigned int dxs_fixed: 1;	/* DXS channel accepts only 48kHz */
	unsigned int no_vra: 1;		/* no need to set VRA on DXS channels */
	unsigned int dxs_src: 1;	/* use full SRC capabilities of DXS */
	unsigned int spdif_on: 1;	/* only spdif rates work to external DACs */

	snd_pcm_t *pcms[2];
	snd_rawmidi_t *rmidi;

	ac97_bus_t *ac97_bus;
	ac97_t *ac97;
	unsigned int ac97_clock;
	unsigned int ac97_secondary;	/* secondary AC'97 codec is present */

	spinlock_t reg_lock;
	snd_info_entry_t *proc_entry;

#ifdef SUPPORT_JOYSTICK
	struct gameport *gameport;
#endif
};

static struct pci_device_id snd_via82xx_ids[] = {
	{ 0x1106, 0x3058, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPE_CARD_VIA686, },	/* 686A */
	{ 0x1106, 0x3059, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPE_CARD_VIA8233, },	/* VT8233 */
	{ 0, }
};

MODULE_DEVICE_TABLE(pci, snd_via82xx_ids);

/*
 */

/*
 * allocate and initialize the descriptor buffers
 * periods = number of periods
 * fragsize = period size in bytes
 */
static int build_via_table(viadev_t *dev, snd_pcm_substream_t *substream,
			   struct pci_dev *pci,
			   unsigned int periods, unsigned int fragsize)
{
	unsigned int i, idx, ofs, rest;
	via82xx_t *chip = snd_pcm_substream_chip(substream);
	struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);

	if (dev->table.area == NULL) {
		/* the start of each lists must be aligned to 8 bytes,
		 * but the kernel pages are much bigger, so we don't care
		 */
		if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
					PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8),
					&dev->table) < 0)
			return -ENOMEM;
	}
	if (! dev->idx_table) {
		dev->idx_table = kmalloc(sizeof(*dev->idx_table) * VIA_TABLE_SIZE, GFP_KERNEL);
		if (! dev->idx_table)
			return -ENOMEM;
	}

	/* fill the entries */
	idx = 0;
	ofs = 0;
	for (i = 0; i < periods; i++) {
		rest = fragsize;
		/* fill descriptors for a period.
		 * a period can be split to several descriptors if it's
		 * over page boundary.
		 */
		do {
			unsigned int r;
			unsigned int flag;

			if (idx >= VIA_TABLE_SIZE) {
				snd_printk(KERN_ERR "via82xx: too much table size!\n");
				return -EINVAL;
			}
			((u32 *)dev->table.area)[idx << 1] = cpu_to_le32((u32)snd_pcm_sgbuf_get_addr(sgbuf, ofs));
			r = PAGE_SIZE - (ofs % PAGE_SIZE);
			if (rest < r)
				r = rest;
			rest -= r;
			if (! rest) {
				if (i == periods - 1)
					flag = VIA_TBL_BIT_EOL; /* buffer boundary */
				else
					flag = VIA_TBL_BIT_FLAG; /* period boundary */
			} else
				flag = 0; /* period continues to the next */
			// printk("via: tbl %d: at %d  size %d (rest %d)\n", idx, ofs, r, rest);
			((u32 *)dev->table.area)[(idx<<1) + 1] = cpu_to_le32(r | flag);
			dev->idx_table[idx].offset = ofs;
			dev->idx_table[idx].size = r;
			ofs += r;
			idx++;
		} while (rest > 0);
	}
	dev->tbl_entries = idx;
	dev->bufsize = periods * fragsize;
	dev->bufsize2 = dev->bufsize / 2;
	dev->fragsize = fragsize;
	return 0;
}


static int clean_via_table(viadev_t *dev, snd_pcm_substream_t *substream,
			   struct pci_dev *pci)
{
	if (dev->table.area) {
		snd_dma_free_pages(&dev->table);
		dev->table.area = NULL;
	}
	kfree(dev->idx_table);
	dev->idx_table = NULL;
	return 0;
}

/*
 *  Basic I/O
 */

static inline unsigned int snd_via82xx_codec_xread(via82xx_t *chip)
{
	return inl(VIAREG(chip, AC97));
}
 
static inline void snd_via82xx_codec_xwrite(via82xx_t *chip, unsigned int val)
{
	outl(val, VIAREG(chip, AC97));
}
 
static int snd_via82xx_codec_ready(via82xx_t *chip, int secondary)
{
	unsigned int timeout = 1000;	/* 1ms */
	unsigned int val;
	
	while (timeout-- > 0) {
		udelay(1);
		if (!((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY))
			return val & 0xffff;
	}
	snd_printk(KERN_ERR "codec_ready: codec %i is not ready [0x%x]\n", secondary, snd_via82xx_codec_xread(chip));
	return -EIO;
}
 
static int snd_via82xx_codec_valid(via82xx_t *chip, int secondary)
{
	unsigned int timeout = 1000;	/* 1ms */
	unsigned int val, val1;
	unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
					 VIA_REG_AC97_SECONDARY_VALID;
	
	while (timeout-- > 0) {
		val = snd_via82xx_codec_xread(chip);
		val1 = val & (VIA_REG_AC97_BUSY | stat);
		if (val1 == stat)
			return val & 0xffff;
		udelay(1);
	}
	return -EIO;
}
 
static void snd_via82xx_codec_wait(ac97_t *ac97)
{
	via82xx_t *chip = ac97->private_data;
	int err;
	err = snd_via82xx_codec_ready(chip, ac97->num);
	/* here we need to wait fairly for long time.. */
	msleep(500);
}

static void snd_via82xx_codec_write(ac97_t *ac97,
				    unsigned short reg,
				    unsigned short val)
{
	via82xx_t *chip = ac97->private_data;
	unsigned int xval;
	
	xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
	xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
	xval |= reg << VIA_REG_AC97_CMD_SHIFT;
	xval |= val << VIA_REG_AC97_DATA_SHIFT;
	snd_via82xx_codec_xwrite(chip, xval);
	snd_via82xx_codec_ready(chip, ac97->num);
}

static unsigned short snd_via82xx_codec_read(ac97_t *ac97, unsigned short reg)
{
	via82xx_t *chip = ac97->private_data;
	unsigned int xval, val = 0xffff;
	int again = 0;

	xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
	xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
	xval |= VIA_REG_AC97_READ;
	xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
      	while (1) {
      		if (again++ > 3) {
			snd_printk(KERN_ERR "codec_read: codec %i is not valid [0x%x]\n", ac97->num, snd_via82xx_codec_xread(chip));
		      	return 0xffff;
		}
		snd_via82xx_codec_xwrite(chip, xval);
		udelay (20);
		if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) {
			udelay(25);
			val = snd_via82xx_codec_xread(chip);
			break;
		}
	}
	return val & 0xffff;
}

static void snd_via82xx_channel_reset(via82xx_t *chip, viadev_t *viadev)
{
	outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET,
	     VIADEV_REG(viadev, OFFSET_CONTROL));
	inb(VIADEV_REG(viadev, OFFSET_CONTROL));
	udelay(50);
	/* disable interrupts */
	outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL));
	/* clear interrupts */
	outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS));
	outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */
	// outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
	viadev->lastpos = 0;
}


/*
 *  Interrupt handler
 */

static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
	via82xx_t *chip = dev_id;
	unsigned int status;
	unsigned int i;

	status = inl(VIAREG(chip, SGD_SHADOW));
	if (! (status & chip->intr_mask)) {
		if (chip->rmidi)
			/* check mpu401 interrupt */
			return snd_mpu401_uart_interrupt(irq, chip->rmidi->private_data, regs);
		return IRQ_NONE;
	}

	/* check status for each stream */
	spin_lock(&chip->reg_lock);
	for (i = 0; i < chip->num_devs; i++) {
		viadev_t *viadev = &chip->devs[i];
		unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
		c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED);
		if (! c_status)
			continue;
		if (viadev->substream && viadev->running) {
			spin_unlock(&chip->reg_lock);
			snd_pcm_period_elapsed(viadev->substream);
			spin_lock(&chip->reg_lock);
		}
		outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
	}
	spin_unlock(&chip->reg_lock);
	return IRQ_HANDLED;
}

/*
 *  PCM callbacks
 */

/*
 * trigger callback
 */
static int snd_via82xx_pcm_trigger(snd_pcm_substream_t * substream, int cmd)
{
	via82xx_t *chip = snd_pcm_substream_chip(substream);
	viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
	unsigned char val;

	if (chip->chip_type != TYPE_VIA686)
		val = VIA_REG_CTRL_INT;
	else
		val = 0;
	switch (cmd) {
	case SNDRV_PCM_TRIGGER_START:
		val |= VIA_REG_CTRL_START;
		viadev->running = 1;
		break;
	case SNDRV_PCM_TRIGGER_STOP:
		val = VIA_REG_CTRL_TERMINATE;
		viadev->running = 0;
		break;
	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
		val |= VIA_REG_CTRL_PAUSE;
		viadev->running = 0;
		break;
	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
		viadev->running = 1;
		break;
	default:
		return -EINVAL;
	}
	outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
	if (cmd == SNDRV_PCM_TRIGGER_STOP)
		snd_via82xx_channel_reset(chip, viadev);
	return 0;
}


/*
 * pointer callbacks
 */

/*
 * calculate the linear position at the given sg-buffer index and the rest count
 */

#define check_invalid_pos(viadev,pos) \
	((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 || viadev->lastpos < viadev->bufsize2))

static inline unsigned int calc_linear_pos(viadev_t *viadev, unsigned int idx, unsigned int count)
{
	unsigned int size, base, res;

	size = viadev->idx_table[idx].size;
	base = viadev->idx_table[idx].offset;
	res = base + size - count;

	/* check the validity of the calculated position */
	if (size < count) {
		snd_printd(KERN_ERR "invalid via82xx_cur_ptr (size = %d, count = %d)\n", (int)size, (int)count);
		res = viadev->lastpos;
	} else {
		if (! count) {
			/* Some mobos report count = 0 on the DMA boundary,
			 * i.e. count = size indeed.
			 * Let's check whether this step is above the expected size.
			 */
			int delta = res - viadev->lastpos;
			if (delta < 0)
				delta += viadev->bufsize;
			if ((unsigned int)delta > viadev->fragsize)
				res = base;
		}
		if (check_invalid_pos(viadev, res)) {
#ifdef POINTER_DEBUG
			printk(KERN_DEBUG "fail: idx = %i/%i, lastpos = 0x%x, bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, count = 0x%x\n", idx, viadev->tbl_entries, viadev->lastpos, viadev->bufsize2, viadev->idx_table[idx].offset, viadev->idx_table[idx].size, count);
#endif
			/* count register returns full size when end of buffer is reached */
			res = base + size;
			if (check_invalid_pos(viadev, res)) {
				snd_printd(KERN_ERR "invalid via82xx_cur_ptr (2), using last valid pointer\n");
				res = viadev->lastpos;
			}
		}
	}
	viadev->lastpos = res; /* remember the last position */
	if (res >= viadev->bufsize)
		res -= viadev->bufsize;
	return res;
}

/*
 * get the current pointer on via686
 */
static snd_pcm_uframes_t snd_via686_pcm_pointer(snd_pcm_substream_t *substream)
{
	via82xx_t *chip = snd_pcm_substream_chip(substream);
	viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
	unsigned int idx, ptr, count, res;

	snd_assert(viadev->tbl_entries, return 0);
	if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
		return 0;

	spin_lock(&chip->reg_lock);
	count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
	/* The via686a does not have the current index register,
	 * so we need to calculate the index from CURR_PTR.
	 */
	ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
	if (ptr <= (unsigned int)viadev->table.addr)
		idx = 0;
	else /* CURR_PTR holds the address + 8 */
		idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) % viadev->tbl_entries;
	res = calc_linear_pos(viadev, idx, count);
	spin_unlock(&chip->reg_lock);

	return bytes_to_frames(substream->runtime, res);
}

/*
 * get the current pointer on via823x
 */
static snd_pcm_uframes_t snd_via8233_pcm_pointer(snd_pcm_substream_t *substream)
{
	via82xx_t *chip = snd_pcm_substream_chip(substream);
	viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
	unsigned int idx, count, res;
	int timeout = 5000;
	
	snd_assert(viadev->tbl_entries, return 0);
	if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
		return 0;
	spin_lock(&chip->reg_lock);
	do {
		count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT));
		/* some mobos read 0 count */
		if ((count & 0xffffff) || ! viadev->running)
			break;
	} while (--timeout);
	if (! timeout)
		snd_printd(KERN_ERR "zero position is read\n");
	idx = count >> 24;
	if (idx >= viadev->tbl_entries) {
#ifdef POINTER_DEBUG
		printk("fail: invalid idx = %i/%i\n", idx, viadev->tbl_entries);
#endif
		res = viadev->lastpos;
	} else {
		count &= 0xffffff;
		res = calc_linear_pos(viadev, idx, count);
	}
	spin_unlock(&chip->reg_lock);

	return bytes_to_frames(substream->runtime, res);
}


/*
 * hw_params callback:
 * allocate the buffer and build up the buffer description table
 */
static int snd_via82xx_hw_params(snd_pcm_substream_t * substream,
				 snd_pcm_hw_params_t * hw_params)
{
	via82xx_t *chip = snd_pcm_substream_chip(substream);
	viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
	int err;

	err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
	if (err < 0)
		return err;
	err = build_via_table(viadev, substream, chip->pci,
			      params_periods(hw_params),
			      params_period_bytes(hw_params));
	if (err < 0)
		return err;

	return 0;
}

/*
 * hw_free callback:
 * clean up the buffer description table and release the buffer
 */
static int snd_via82xx_hw_free(snd_pcm_substream_t * substream)
{
	via82xx_t *chip = snd_pcm_substream_chip(substream);
	viadev_t *viadev = (viadev_t *)substream->runtime->private_data;

	clean_via_table(viadev, substream, chip->pci);
	snd_pcm_lib_free_pages(substream);
	return 0;
}


/*
 * set up the table pointer
 */
static void snd_via82xx_set_table_ptr(via82xx_t *chip, viadev_t *viadev)
{
	snd_via82xx_codec_ready(chip, 0);
	outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
	udelay(20);
	snd_via82xx_codec_ready(chip, 0);
}

/*
 * prepare callback for playback and capture on via686
 */
static void via686_setup_format(via82xx_t *chip, viadev_t *viadev, snd_pcm_runtime_t *runtime)
{
	snd_via82xx_channel_reset(chip, viadev);
	/* this must be set after channel_reset */
	snd_via82xx_set_table_ptr(chip, viadev);
	outb(VIA_REG_TYPE_AUTOSTART |
	     (runtime->format == SNDRV_PCM_FORMAT_S16_LE ? VIA_REG_TYPE_16BIT : 0) |
	     (runtime->channels > 1 ? VIA_REG_TYPE_STEREO : 0) |
	     ((viadev->reg_offset & 0x10) == 0 ? VIA_REG_TYPE_INT_LSAMPLE : 0) |
	     VIA_REG_TYPE_INT_EOL |
	     VIA_REG_TYPE_INT_FLAG, VIADEV_REG(viadev, OFFSET_TYPE));
}

static int snd_via686_playback_prepare(snd_pcm_substream_t *substream)
{
	via82xx_t *chip = snd_pcm_substream_chip(substream);
	viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
	snd_pcm_runtime_t *runtime = substream->runtime;

	snd_ac97_set_rate(chip->ac97, AC97_PCM_FRONT_DAC_RATE, runtime->rate);
	snd_ac97_set_rate(chip->ac97, AC97_SPDIF, runtime->rate);
	via686_setup_format(chip, viadev, runtime);
	return 0;
}

static int snd_via686_capture_prepare(snd_pcm_substream_t *substream)
{
	via82xx_t *chip = snd_pcm_substream_chip(substream);
	viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
	snd_pcm_runtime_t *runtime = substream->runtime;

	snd_ac97_set_rate(chip->ac97, AC97_PCM_LR_ADC_RATE, runtime->rate);
	via686_setup_format(chip, viadev, runtime);
	return 0;
}

/*
 * lock the current rate
 */
static int via_lock_rate(struct via_rate_lock *rec, int rate)
{
	int changed = 0;

	spin_lock_irq(&rec->lock);
	if (rec->rate != rate) {
		if (rec->rate && rec->used > 1) /* already set */
			changed = -EINVAL;
		else {
			rec->rate = rate;
			changed = 1;
		}
	}
	spin_unlock_irq(&rec->lock);
	return changed;
}

/*
 * prepare callback for DSX playback on via823x
 */
static int snd_via8233_playback_prepare(snd_pcm_substream_t *substream)
{
	via82xx_t *chip = snd_pcm_substream_chip(substream);
	viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
	snd_pcm_runtime_t *runtime = substream->runtime;
	int ac97_rate = chip->dxs_src ? 48000 : runtime->rate;
	int rate_changed;
	u32 rbits;

	if ((rate_changed = via_lock_rate(&chip->rates[0], ac97_rate)) < 0)
		return rate_changed;
	if (rate_changed)
		snd_ac97_set_rate(chip->ac97, AC97_PCM_FRONT_DAC_RATE,
				  chip->no_vra ? 48000 : runtime->rate);
	if (chip->spdif_on && viadev->reg_offset == 0x30)
		snd_ac97_set_rate(chip->ac97, AC97_SPDIF, runtime->rate);

	if (runtime->rate == 48000)
		rbits = 0xfffff;
	else
		rbits = (0x100000 / 48000) * runtime->rate + ((0x100000 % 48000) * runtime->rate) / 48000;
	snd_assert((rbits & ~0xfffff) == 0, return -EINVAL);
	snd_via82xx_channel_reset(chip, viadev);
	snd_via82xx_set_table_ptr(chip, viadev);
	outb(chip->playback_volume[0], VIADEV_REG(viadev, OFS_PLAYBACK_VOLUME_L));
	outb(chip->playback_volume[1], VIADEV_REG(viadev, OFS_PLAYBACK_VOLUME_R));
	outl((runtime->format == SNDRV_PCM_FORMAT_S16_LE ? VIA8233_REG_TYPE_16BIT : 0) | /* format */
	     (runtime->channels > 1 ? VIA8233_REG_TYPE_STEREO : 0) | /* stereo */
	     rbits | /* rate */
	     0xff000000,    /* STOP index is never reached */
	     VIADEV_REG(viadev, OFFSET_STOP_IDX));
	udelay(20);
	snd_via82xx_codec_ready(chip, 0);
	return 0;
}

/*
 * prepare callback for multi-channel playback on via823x
 */
static int snd_via8233_multi_prepare(snd_pcm_substream_t *substream)
{
	via82xx_t *chip = snd_pcm_substream_chip(substream);
	viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
	snd_pcm_runtime_t *runtime = substream->runtime;
	unsigned int slots;
	int fmt;

	if (via_lock_rate(&chip->rates[0], runtime->rate) < 0)
		return -EINVAL;
	snd_ac97_set_rate(chip->ac97, AC97_PCM_FRONT_DAC_RATE, runtime->rate);
	snd_ac97_set_rate(chip->ac97, AC97_PCM_SURR_DAC_RATE, runtime->rate);
	snd_ac97_set_rate(chip->ac97, AC97_PCM_LFE_DAC_RATE, runtime->rate);
	snd_ac97_set_rate(chip->ac97, AC97_SPDIF, runtime->rate);
	snd_via82xx_channel_reset(chip, viadev);
	snd_via82xx_set_table_ptr(chip, viadev);

	fmt = (runtime->format == SNDRV_PCM_FORMAT_S16_LE) ? VIA_REG_MULTPLAY_FMT_16BIT : VIA_REG_MULTPLAY_FMT_8BIT;
	fmt |= runtime->channels << 4;
	outb(fmt, VIADEV_REG(viadev, OFS_MULTPLAY_FORMAT));
#if 0
	if (chip->revision == VIA_REV_8233A)
		slots = 0;
	else
#endif
	{
		/* set sample number to slot 3, 4, 7, 8, 6, 9 (for VIA8233/C,8235) */
		/* corresponding to FL, FR, RL, RR, C, LFE ?? */
		switch (runtime->channels) {
		case 1: slots = (1<<0) | (1<<4); break;
		case 2: slots = (1<<0) | (2<<4); break;
		case 3: slots = (1<<0) | (2<<4) | (5<<8); break;
		case 4: slots = (1<<0) | (2<<4) | (3<<8) | (4<<12); break;
		case 5: slots = (1<<0) | (2<<4) | (3<<8) | (4<<12) | (5<<16); break;
		case 6: slots = (1<<0) | (2<<4) | (3<<8) | (4<<12) | (5<<16) | (6<<20); break;
		default: slots = 0; break;
		}
	}
	/* STOP index is never reached */
	outl(0xff000000 | slots, VIADEV_REG(viadev, OFFSET_STOP_IDX));
	udelay(20);
	snd_via82xx_codec_ready(chip, 0);
	return 0;
}

/*
 * prepare callback for capture on via823x
 */
static int snd_via8233_capture_prepare(snd_pcm_substream_t *substream)
{
	via82xx_t *chip = snd_pcm_substream_chip(substream);
	viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
	snd_pcm_runtime_t *runtime = substream->runtime;

	if (via_lock_rate(&chip->rates[1], runtime->rate) < 0)
		return -EINVAL;
	snd_ac97_set_rate(chip->ac97, AC97_PCM_LR_ADC_RATE, runtime->rate);
	snd_via82xx_channel_reset(chip, viadev);
	snd_via82xx_set_table_ptr(chip, viadev);
	outb(VIA_REG_CAPTURE_FIFO_ENABLE, VIADEV_REG(viadev, OFS_CAPTURE_FIFO));
	outl((runtime->format == SNDRV_PCM_FORMAT_S16_LE ? VIA8233_REG_TYPE_16BIT : 0) |
	     (runtime->channels > 1 ? VIA8233_REG_TYPE_STEREO : 0) |
	     0xff000000,    /* STOP index is never reached */
	     VIADEV_REG(viadev, OFFSET_STOP_IDX));
	udelay(20);
	snd_via82xx_codec_ready(chip, 0);
	return 0;
}


/*
 * pcm hardware definition, identical for both playback and capture
 */
static snd_pcm_hardware_t snd_via82xx_hw =
{
	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
				 SNDRV_PCM_INFO_MMAP_VALID |
				 SNDRV_PCM_INFO_RESUME |
				 SNDRV_PCM_INFO_PAUSE),
	.formats =		SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
	.rates =		SNDRV_PCM_RATE_48000,
	.rate_min =		48000,
	.rate_max =		48000,
	.channels_min =		1,
	.channels_max =		2,
	.buffer_bytes_max =	128 * 1024,
	.period_bytes_min =	32,
	.period_bytes_max =	128 * 1024,
	.periods_min =		2,
	.periods_max =		VIA_TABLE_SIZE / 2,
	.fifo_size =		0,
};


/*
 * open callback skeleton
 */
static int snd_via82xx_pcm_open(via82xx_t *chip, viadev_t *viadev, snd_pcm_substream_t * substream)
{
	snd_pcm_runtime_t *runtime = substream->runtime;
	int err;
	struct via_rate_lock *ratep;

	runtime->hw = snd_via82xx_hw;
	
	/* set the hw rate condition */
	ratep = &chip->rates[viadev->direction];
	spin_lock_irq(&ratep->lock);
	ratep->used++;
	if (chip->spdif_on && viadev->reg_offset == 0x30) {
		/* DXS#3 and spdif is on */
		runtime->hw.rates = chip->ac97->rates[AC97_RATES_SPDIF];
		snd_pcm_limit_hw_rates(runtime);
	} else if (chip->dxs_fixed && viadev->reg_offset < 0x40) {
		/* fixed DXS playback rate */
		runtime->hw.rates = SNDRV_PCM_RATE_48000;
		runtime->hw.rate_min = runtime->hw.rate_max = 48000;
	} else if (chip->dxs_src && viadev->reg_offset < 0x40) {
		/* use full SRC capabilities of DXS */
		runtime->hw.rates = (SNDRV_PCM_RATE_CONTINUOUS |
				     SNDRV_PCM_RATE_8000_48000);
		runtime->hw.rate_min = 8000;
		runtime->hw.rate_max = 48000;
	} else if (! ratep->rate) {
		int idx = viadev->direction ? AC97_RATES_ADC : AC97_RATES_FRONT_DAC;
		runtime->hw.rates = chip->ac97->rates[idx];
		snd_pcm_limit_hw_rates(runtime);
	} else {
		/* a fixed rate */
		runtime->hw.rates = SNDRV_PCM_RATE_KNOT;
		runtime->hw.rate_max = runtime->hw.rate_min = ratep->rate;
	}
	spin_unlock_irq(&ratep->lock);

	/* we may remove following constaint when we modify table entries
	   in interrupt */
	if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
		return err;

	runtime->private_data = viadev;
	viadev->substream = substream;

	return 0;
}


/*
 * open callback for playback on via686 and via823x DSX
 */
static int snd_via82xx_playback_open(snd_pcm_substream_t * substream)
{
	via82xx_t *chip = snd_pcm_substream_chip(substream);
	viadev_t *viadev = &chip->devs[chip->playback_devno + substream->number];
	int err;

	if ((err = snd_via82xx_pcm_open(chip, viadev, substream)) < 0)
		return err;
	return 0;
}

/*
 * open callback for playback on via823x multi-channel
 */
static int snd_via8233_multi_open(snd_pcm_substream_t * substream)
{
	via82xx_t *chip = snd_pcm_substream_chip(substream);
	viadev_t *viadev = &chip->devs[chip->multi_devno];
	int err;
	/* channels constraint for VIA8233A
	 * 3 and 5 channels are not supported
	 */
	static unsigned int channels[] = {
		1, 2, 4, 6
	};
	static snd_pcm_hw_constraint_list_t hw_constraints_channels = {
		.count = ARRAY_SIZE(channels),
		.list = channels,
		.mask = 0,
	};

	if ((err = snd_via82xx_pcm_open(chip, viadev, substream)) < 0)
		return err;
	substream->runtime->hw.channels_max = 6;
	if (chip->revision == VIA_REV_8233A)
		snd_pcm_hw_constraint_list(substream->runtime, 0, SNDRV_PCM_HW_PARAM_CHANNELS, &hw_constraints_channels);
	return 0;
}

/*
 * open callback for capture on via686 and via823x
 */
static int snd_via82xx_capture_open(snd_pcm_substream_t * substream)
{
	via82xx_t *chip = snd_pcm_substream_chip(substream);
	viadev_t *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];

	return snd_via82xx_pcm_open(chip, viadev, substream);
}

/*
 * close callback
 */
static int snd_via82xx_pcm_close(snd_pcm_substream_t * substream)
{
	via82xx_t *chip = snd_pcm_substream_chip(substream);
	viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
	struct via_rate_lock *ratep;

	/* release the rate lock */
	ratep = &chip->rates[viadev->direction];
	spin_lock_irq(&ratep->lock);
	ratep->used--;
	if (! ratep->used)
		ratep->rate = 0;
	spin_unlock_irq(&ratep->lock);

	viadev->substream = NULL;
	return 0;
}


/* via686 playback callbacks */
static snd_pcm_ops_t snd_via686_playback_ops = {
	.open =		snd_via82xx_playback_open,
	.close =	snd_via82xx_pcm_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_via82xx_hw_params,
	.hw_free =	snd_via82xx_hw_free,
	.prepare =	snd_via686_playback_prepare,
	.trigger =	snd_via82xx_pcm_trigger,
	.pointer =	snd_via686_pcm_pointer,
	.page =		snd_pcm_sgbuf_ops_page,
};

/* via686 capture callbacks */
static snd_pcm_ops_t snd_via686_capture_ops = {
	.open =		snd_via82xx_capture_open,
	.close =	snd_via82xx_pcm_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_via82xx_hw_params,
	.hw_free =	snd_via82xx_hw_free,
	.prepare =	snd_via686_capture_prepare,
	.trigger =	snd_via82xx_pcm_trigger,
	.pointer =	snd_via686_pcm_pointer,
	.page =		snd_pcm_sgbuf_ops_page,
};

/* via823x DSX playback callbacks */
static snd_pcm_ops_t snd_via8233_playback_ops = {
	.open =		snd_via82xx_playback_open,
	.close =	snd_via82xx_pcm_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_via82xx_hw_params,
	.hw_free =	snd_via82xx_hw_free,
	.prepare =	snd_via8233_playback_prepare,
	.trigger =	snd_via82xx_pcm_trigger,
	.pointer =	snd_via8233_pcm_pointer,
	.page =		snd_pcm_sgbuf_ops_page,
};

/* via823x multi-channel playback callbacks */
static snd_pcm_ops_t snd_via8233_multi_ops = {
	.open =		snd_via8233_multi_open,
	.close =	snd_via82xx_pcm_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_via82xx_hw_params,
	.hw_free =	snd_via82xx_hw_free,
	.prepare =	snd_via8233_multi_prepare,
	.trigger =	snd_via82xx_pcm_trigger,
	.pointer =	snd_via8233_pcm_pointer,
	.page =		snd_pcm_sgbuf_ops_page,
};

/* via823x capture callbacks */
static snd_pcm_ops_t snd_via8233_capture_ops = {
	.open =		snd_via82xx_capture_open,
	.close =	snd_via82xx_pcm_close,
	.ioctl =	snd_pcm_lib_ioctl,
	.hw_params =	snd_via82xx_hw_params,
	.hw_free =	snd_via82xx_hw_free,
	.prepare =	snd_via8233_capture_prepare,
	.trigger =	snd_via82xx_pcm_trigger,
	.pointer =	snd_via8233_pcm_pointer,
	.page =		snd_pcm_sgbuf_ops_page,
};


static void init_viadev(via82xx_t *chip, int idx, unsigned int reg_offset, int direction)
{
	chip->devs[idx].reg_offset = reg_offset;
	chip->devs[idx].direction = direction;
	chip->devs[idx].port = chip->port + reg_offset;
}

/*
 * create pcm instances for VIA8233, 8233C and 8235 (not 8233A)
 */
static int __devinit snd_via8233_pcm_new(via82xx_t *chip)
{
	snd_pcm_t *pcm;
	int i, err;

	chip->playback_devno = 0;	/* x 4 */
	chip->multi_devno = 4;		/* x 1 */
	chip->capture_devno = 5;	/* x 2 */
	chip->num_devs = 7;
	chip->intr_mask = 0x33033333; /* FLAG|EOL for rec0-1, mc, sdx0-3 */

	/* PCM #0:  4 DSX playbacks and 1 capture */
	err = snd_pcm_new(chip->card, chip->card->shortname, 0, 4, 1, &pcm);
	if (err < 0)
		return err;
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via8233_playback_ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via8233_capture_ops);
	pcm->private_data = chip;
	strcpy(pcm->name, chip->card->shortname);
	chip->pcms[0] = pcm;
	/* set up playbacks */
	for (i = 0; i < 4; i++)
		init_viadev(chip, i, 0x10 * i, 0);
	/* capture */
	init_viadev(chip, chip->capture_devno, VIA_REG_CAPTURE_8233_STATUS, 1);

	if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
							 snd_dma_pci_data(chip->pci), 64*1024, 128*1024)) < 0)
		return err;

	/* PCM #1:  multi-channel playback and 2nd capture */
	err = snd_pcm_new(chip->card, chip->card->shortname, 1, 1, 1, &pcm);
	if (err < 0)
		return err;
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via8233_multi_ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via8233_capture_ops);
	pcm->private_data = chip;
	strcpy(pcm->name, chip->card->shortname);
	chip->pcms[1] = pcm;
	/* set up playback */
	init_viadev(chip, chip->multi_devno, VIA_REG_MULTPLAY_STATUS, 0);
	/* set up capture */
	init_viadev(chip, chip->capture_devno + 1, VIA_REG_CAPTURE_8233_STATUS + 0x10, 1);

	if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
						         snd_dma_pci_data(chip->pci), 64*1024, 128*1024)) < 0)
		return err;

	return 0;
}

/*
 * create pcm instances for VIA8233A
 */
static int __devinit snd_via8233a_pcm_new(via82xx_t *chip)
{
	snd_pcm_t *pcm;
	int err;

	chip->multi_devno = 0;
	chip->playback_devno = 1;
	chip->capture_devno = 2;
	chip->num_devs = 3;
	chip->intr_mask = 0x03033000; /* FLAG|EOL for rec0, mc, sdx3 */

	/* PCM #0:  multi-channel playback and capture */
	err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
	if (err < 0)
		return err;
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via8233_multi_ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via8233_capture_ops);
	pcm->private_data = chip;
	strcpy(pcm->name, chip->card->shortname);
	chip->pcms[0] = pcm;
	/* set up playback */
	init_viadev(chip, chip->multi_devno, VIA_REG_MULTPLAY_STATUS, 0);
	/* capture */
	init_viadev(chip, chip->capture_devno, VIA_REG_CAPTURE_8233_STATUS, 1);

	if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
							 snd_dma_pci_data(chip->pci), 64*1024, 128*1024)) < 0)
		return err;

	/* SPDIF supported? */
	if (! ac97_can_spdif(chip->ac97))
		return 0;

	/* PCM #1:  DXS3 playback (for spdif) */
	err = snd_pcm_new(chip->card, chip->card->shortname, 1, 1, 0, &pcm);
	if (err < 0)
		return err;
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via8233_playback_ops);
	pcm->private_data = chip;
	strcpy(pcm->name, chip->card->shortname);
	chip->pcms[1] = pcm;
	/* set up playback */
	init_viadev(chip, chip->playback_devno, 0x30, 0);

	if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
							 snd_dma_pci_data(chip->pci), 64*1024, 128*1024)) < 0)
		return err;

	return 0;
}

/*
 * create a pcm instance for via686a/b
 */
static int __devinit snd_via686_pcm_new(via82xx_t *chip)
{
	snd_pcm_t *pcm;
	int err;

	chip->playback_devno = 0;
	chip->capture_devno = 1;
	chip->num_devs = 2;
	chip->intr_mask = 0x77; /* FLAG | EOL for PB, CP, FM */

	err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
	if (err < 0)
		return err;
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
	pcm->private_data = chip;
	strcpy(pcm->name, chip->card->shortname);
	chip->pcms[0] = pcm;
	init_viadev(chip, 0, VIA_REG_PLAYBACK_STATUS, 0);
	init_viadev(chip, 1, VIA_REG_CAPTURE_STATUS, 1);

	if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
							 snd_dma_pci_data(chip->pci), 64*1024, 128*1024)) < 0)
		return err;

	return 0;
}


/*
 *  Mixer part
 */

static int snd_via8233_capture_source_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
{
	/* formerly they were "Line" and "Mic", but it looks like that they
	 * have nothing to do with the actual physical connections...
	 */
	static char *texts[2] = {
		"Input1", "Input2"
	};
	uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
	uinfo->count = 1;
	uinfo->value.enumerated.items = 2;
	if (uinfo->value.enumerated.item >= 2)
		uinfo->value.enumerated.item = 1;
	strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
	return 0;
}

static int snd_via8233_capture_source_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
{
	via82xx_t *chip = snd_kcontrol_chip(kcontrol);
	unsigned long port = chip->port + (kcontrol->id.index ? (VIA_REG_CAPTURE_CHANNEL + 0x10) : VIA_REG_CAPTURE_CHANNEL);
	ucontrol->value.enumerated.item[0] = inb(port) & VIA_REG_CAPTURE_CHANNEL_MIC ? 1 : 0;
	return 0;
}

static int snd_via8233_capture_source_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
{
	via82xx_t *chip = snd_kcontrol_chip(kcontrol);
	unsigned long port = chip->port + (kcontrol->id.index ? (VIA_REG_CAPTURE_CHANNEL + 0x10) : VIA_REG_CAPTURE_CHANNEL);
	u8 val, oval;

	spin_lock_irq(&chip->reg_lock);
	oval = inb(port);
	val = oval & ~VIA_REG_CAPTURE_CHANNEL_MIC;
	if (ucontrol->value.enumerated.item[0])
		val |= VIA_REG_CAPTURE_CHANNEL_MIC;
	if (val != oval)
		outb(val, port);
	spin_unlock_irq(&chip->reg_lock);
	return val != oval;
}

static snd_kcontrol_new_t snd_via8233_capture_source __devinitdata = {
	.name = "Input Source Select",
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.info = snd_via8233_capture_source_info,
	.get = snd_via8233_capture_source_get,
	.put = snd_via8233_capture_source_put,
};

static int snd_via8233_dxs3_spdif_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
	uinfo->count = 1;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = 1;
	return 0;
}

static int snd_via8233_dxs3_spdif_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
{
	via82xx_t *chip = snd_kcontrol_chip(kcontrol);
	u8 val;

	pci_read_config_byte(chip->pci, VIA8233_SPDIF_CTRL, &val);
	ucontrol->value.integer.value[0] = (val & VIA8233_SPDIF_DX3) ? 1 : 0;
	return 0;
}

static int snd_via8233_dxs3_spdif_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
{
	via82xx_t *chip = snd_kcontrol_chip(kcontrol);
	u8 val, oval;

	pci_read_config_byte(chip->pci, VIA8233_SPDIF_CTRL, &oval);
	val = oval & ~VIA8233_SPDIF_DX3;
	if (ucontrol->value.integer.value[0])
		val |= VIA8233_SPDIF_DX3;
	/* save the spdif flag for rate filtering */
	chip->spdif_on = ucontrol->value.integer.value[0] ? 1 : 0;
	if (val != oval) {
		pci_write_config_byte(chip->pci, VIA8233_SPDIF_CTRL, val);
		return 1;
	}
	return 0;
}

static snd_kcontrol_new_t snd_via8233_dxs3_spdif_control __devinitdata = {
	.name = SNDRV_CTL_NAME_IEC958("Output ",NONE,SWITCH),
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.info = snd_via8233_dxs3_spdif_info,
	.get = snd_via8233_dxs3_spdif_get,
	.put = snd_via8233_dxs3_spdif_put,
};

static int snd_via8233_dxs_volume_info(snd_kcontrol_t *kcontrol, snd_ctl_elem_info_t *uinfo)
{
	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
	uinfo->count = 2;
	uinfo->value.integer.min = 0;
	uinfo->value.integer.max = VIA_DXS_MAX_VOLUME;
	return 0;
}

static int snd_via8233_dxs_volume_get(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
{
	via82xx_t *chip = snd_kcontrol_chip(kcontrol);
	ucontrol->value.integer.value[0] = VIA_DXS_MAX_VOLUME - chip->playback_volume[0];
	ucontrol->value.integer.value[1] = VIA_DXS_MAX_VOLUME - chip->playback_volume[1];
	return 0;
}

static int snd_via8233_dxs_volume_put(snd_kcontrol_t *kcontrol, snd_ctl_elem_value_t *ucontrol)
{
	via82xx_t *chip = snd_kcontrol_chip(kcontrol);
	unsigned int idx;
	unsigned char val;
	int i, change = 0;

	for (i = 0; i < 2; i++) {
		val = ucontrol->value.integer.value[i];
		if (val > VIA_DXS_MAX_VOLUME)
			val = VIA_DXS_MAX_VOLUME;
		val = VIA_DXS_MAX_VOLUME - val;
		if (val != chip->playback_volume[i]) {
			change = 1;
			chip->playback_volume[i] = val;
			for (idx = 0; idx < 4; idx++) {
				unsigned long port = chip->port + 0x10 * idx;
				outb(val, port + VIA_REG_OFS_PLAYBACK_VOLUME_L + i);
			}
		}
	}
	return change;
}

static snd_kcontrol_new_t snd_via8233_dxs_volume_control __devinitdata = {
	.name = "PCM Playback Volume",
	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,
	.info = snd_via8233_dxs_volume_info,
	.get = snd_via8233_dxs_volume_get,
	.put = snd_via8233_dxs_volume_put,
};

/*
 */

static void snd_via82xx_mixer_free_ac97_bus(ac97_bus_t *bus)
{
	via82xx_t *chip = bus->private_data;
	chip->ac97_bus = NULL;
}

static void snd_via82xx_mixer_free_ac97(ac97_t *ac97)
{
	via82xx_t *chip = ac97->private_data;
	chip->ac97 = NULL;
}

static struct ac97_quirk ac97_quirks[] = {
	{
		.subvendor = 0x1106,
		.subdevice = 0x4161,
		.codec_id = 0x56494161, /* VT1612A */
		.name = "Soltek SL-75DRV5",
		.type = AC97_TUNE_NONE
	},
	{	/* FIXME: which codec? */
		.subvendor = 0x1106,
		.subdevice = 0x4161,
		.name = "ASRock K7VT2",
		.type = AC97_TUNE_HP_ONLY
	},
	{
		.subvendor = 0x1019,
		.subdevice = 0x0a81,
		.name = "ECS K7VTA3",
		.type = AC97_TUNE_HP_ONLY
	},
	{
		.subvendor = 0x1019,
		.subdevice = 0x0a85,
		.name = "ECS L7VMM2",
		.type = AC97_TUNE_HP_ONLY
	},
	{
		.subvendor = 0x1849,
		.subdevice = 0x3059,
		.name = "ASRock K7VM2",
		.type = AC97_TUNE_HP_ONLY	/* VT1616 */
	},
	{
		.subvendor = 0x14cd,
		.subdevice = 0x7002,
		.name = "Unknown",
		.type = AC97_TUNE_ALC_JACK
	},
	{
		.subvendor = 0x1071,
		.subdevice = 0x8590,
		.name = "Mitac Mobo",
		.type = AC97_TUNE_ALC_JACK
	},
	{
		.subvendor = 0x161f,
		.subdevice = 0x202b,
		.name = "Arima Notebook",
		.type = AC97_TUNE_HP_ONLY,
	},
	{ } /* terminator */
};

static int __devinit snd_via82xx_mixer_new(via82xx_t *chip, const char *quirk_override)
{
	ac97_template_t ac97;
	int err;
	static ac97_bus_ops_t ops = {
		.write = snd_via82xx_codec_write,
		.read = snd_via82xx_codec_read,
		.wait = snd_via82xx_codec_wait,
	};

	if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
		return err;
	chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
	chip->ac97_bus->clock = chip->ac97_clock;
	chip->ac97_bus->shared_type = AC97_SHARED_TYPE_VIA;

	memset(&ac97, 0, sizeof(ac97));
	ac97.private_data = chip;
	ac97.private_free = snd_via82xx_mixer_free_ac97;
	ac97.pci = chip->pci;
	if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
		return err;

	snd_ac97_tune_hardware(chip->ac97, ac97_quirks, quirk_override);

	if (chip->chip_type != TYPE_VIA686) {
		/* use slot 10/11 */
		snd_ac97_update_bits(chip->ac97, AC97_EXTENDED_STATUS, 0x03 << 4, 0x03 << 4);
	}

	return 0;
}

#ifdef SUPPORT_JOYSTICK
#define JOYSTICK_ADDR	0x200
static int __devinit snd_via686_create_gameport(via82xx_t *chip, int dev, unsigned char *legacy)
{
	struct gameport *gp;
	struct resource *r;

	if (!joystick[dev])
		return -ENODEV;

	r = request_region(JOYSTICK_ADDR, 8, "VIA686 gameport");
	if (!r) {
		printk(KERN_WARNING "via82xx: cannot reserve joystick port 0x%#x\n", JOYSTICK_ADDR);
		return -EBUSY;
	}

	chip->gameport = gp = gameport_allocate_port();
	if (!gp) {
		printk(KERN_ERR "via82xx: cannot allocate memory for gameport\n");
		release_resource(r);
		kfree_nocheck(r);
		return -ENOMEM;
	}

	gameport_set_name(gp, "VIA686 Gameport");
	gameport_set_phys(gp, "pci%s/gameport0", pci_name(chip->pci));
	gameport_set_dev_parent(gp, &chip->pci->dev);
	gp->io = JOYSTICK_ADDR;
	gameport_set_port_data(gp, r);

	/* Enable legacy joystick port */
	*legacy |= VIA_FUNC_ENABLE_GAME;
	pci_write_config_byte(chip->pci, VIA_FUNC_ENABLE, *legacy);

	gameport_register_port(chip->gameport);

	return 0;
}

static void snd_via686_free_gameport(via82xx_t *chip)
{
	if (chip->gameport) {
		struct resource *r = gameport_get_port_data(chip->gameport);

		gameport_unregister_port(chip->gameport);
		chip->gameport = NULL;
		release_resource(r);
		kfree_nocheck(r);
	}
}
#else
static inline int snd_via686_create_gameport(via82xx_t *chip, int dev, unsigned char *legacy)
{
	return -ENOSYS;
}
static inline void snd_via686_free_gameport(via82xx_t *chip) { }
#endif


/*
 *
 */

static int __devinit snd_via8233_init_misc(via82xx_t *chip, int dev)
{
	int i, err, caps;
	unsigned char val;

	caps = chip->chip_type == TYPE_VIA8233A ? 1 : 2;
	for (i = 0; i < caps; i++) {
		snd_via8233_capture_source.index = i;
		err = snd_ctl_add(chip->card, snd_ctl_new1(&snd_via8233_capture_source, chip));
		if (err < 0)
			return err;
	}
	if (ac97_can_spdif(chip->ac97)) {
		err = snd_ctl_add(chip->card, snd_ctl_new1(&snd_via8233_dxs3_spdif_control, chip));
		if (err < 0)
			return err;
	}
	if (chip->chip_type != TYPE_VIA8233A) {
		/* when no h/w PCM volume control is found, use DXS volume control
		 * as the PCM vol control
		 */
		snd_ctl_elem_id_t sid;
		memset(&sid, 0, sizeof(sid));
		strcpy(sid.name, "PCM Playback Volume");
		sid.iface = SNDRV_CTL_ELEM_IFACE_MIXER;
		if (! snd_ctl_find_id(chip->card, &sid)) {
			err = snd_ctl_add(chip->card, snd_ctl_new1(&snd_via8233_dxs_volume_control, chip));
			if (err < 0)
				return err;
		}
	}

	/* select spdif data slot 10/11 */
	pci_read_config_byte(chip->pci, VIA8233_SPDIF_CTRL, &val);
	val = (val & ~VIA8233_SPDIF_SLOT_MASK) | VIA8233_SPDIF_SLOT_1011;
	val &= ~VIA8233_SPDIF_DX3; /* SPDIF off as default */
	pci_write_config_byte(chip->pci, VIA8233_SPDIF_CTRL, val);

	return 0;
}

static int __devinit snd_via686_init_misc(via82xx_t *chip, int dev)
{
	unsigned char legacy, legacy_cfg;
	int rev_h = 0;

	legacy = chip->old_legacy;
	legacy_cfg = chip->old_legacy_cfg;
	legacy |= VIA_FUNC_MIDI_IRQMASK;	/* FIXME: correct? (disable MIDI) */
	legacy &= ~VIA_FUNC_ENABLE_GAME;	/* disable joystick */
	if (chip->revision >= VIA_REV_686_H) {
		rev_h = 1;
		if (mpu_port[dev] >= 0x200) {	/* force MIDI */
			mpu_port[dev] &= 0xfffc;
			pci_write_config_dword(chip->pci, 0x18, mpu_port[dev] | 0x01);
#ifdef CONFIG_PM
			chip->mpu_port_saved = mpu_port[dev];
#endif
		} else {
			mpu_port[dev] = pci_resource_start(chip->pci, 2);
		}
	} else {
		switch (mpu_port[dev]) {	/* force MIDI */
		case 0x300:
		case 0x310:
		case 0x320:
		case 0x330:
			legacy_cfg &= ~(3 << 2);
			legacy_cfg |= (mpu_port[dev] & 0x0030) >> 2;
			break;
		default:			/* no, use BIOS settings */
			if (legacy & VIA_FUNC_ENABLE_MIDI)
				mpu_port[dev] = 0x300 + ((legacy_cfg & 0x000c) << 2);
			break;
		}
	}
	if (mpu_port[dev] >= 0x200 &&
	    (chip->mpu_res = request_region(mpu_port[dev], 2, "VIA82xx MPU401")) != NULL) {
		if (rev_h)
			legacy |= VIA_FUNC_MIDI_PNP;	/* enable PCI I/O 2 */
		legacy |= VIA_FUNC_ENABLE_MIDI;
	} else {
		if (rev_h)
			legacy &= ~VIA_FUNC_MIDI_PNP;	/* disable PCI I/O 2 */
		legacy &= ~VIA_FUNC_ENABLE_MIDI;
		mpu_port[dev] = 0;
	}

	pci_write_config_byte(chip->pci, VIA_FUNC_ENABLE, legacy);
	pci_write_config_byte(chip->pci, VIA_PNP_CONTROL, legacy_cfg);
	if (chip->mpu_res) {
		if (snd_mpu401_uart_new(chip->card, 0, MPU401_HW_VIA686A,
					mpu_port[dev], 1,
					chip->irq, 0, &chip->rmidi) < 0) {
			printk(KERN_WARNING "unable to initialize MPU-401 at 0x%lx, skipping\n", mpu_port[dev]);
			legacy &= ~VIA_FUNC_ENABLE_MIDI;
		} else {
			legacy &= ~VIA_FUNC_MIDI_IRQMASK;	/* enable MIDI interrupt */
		}
		pci_write_config_byte(chip->pci, VIA_FUNC_ENABLE, legacy);
	}

	snd_via686_create_gameport(chip, dev, &legacy);

#ifdef CONFIG_PM
	chip->legacy_saved = legacy;
	chip->legacy_cfg_saved = legacy_cfg;
#endif

	return 0;
}


/*
 * proc interface
 */
static void snd_via82xx_proc_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
{
	via82xx_t *chip = entry->private_data;
	int i;
	
	snd_iprintf(buffer, "%s\n\n", chip->card->longname);
	for (i = 0; i < 0xa0; i += 4) {
		snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
	}
}

static void __devinit snd_via82xx_proc_init(via82xx_t *chip)
{
	snd_info_entry_t *entry;

	if (! snd_card_proc_new(chip->card, "via82xx", &entry))
		snd_info_set_text_ops(entry, chip, 1024, snd_via82xx_proc_read);
}

/*
 *
 */

static int snd_via82xx_chip_init(via82xx_t *chip)
{
	unsigned int val;
	unsigned long end_time;
	unsigned char pval;

#if 0 /* broken on K7M? */
	if (chip->chip_type == TYPE_VIA686)
		/* disable all legacy ports */
		pci_write_config_byte(chip->pci, VIA_FUNC_ENABLE, 0);
#endif
	pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
	if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
		/* deassert ACLink reset, force SYNC */
		pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
				      VIA_ACLINK_CTRL_ENABLE |
				      VIA_ACLINK_CTRL_RESET |
				      VIA_ACLINK_CTRL_SYNC);
		udelay(100);
#if 1 /* FIXME: should we do full reset here for all chip models? */
		pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
		udelay(100);
#else
		/* deassert ACLink reset, force SYNC (warm AC'97 reset) */
		pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
				      VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
		udelay(2);
#endif
		/* ACLink on, deassert ACLink reset, VSR, SGD data out */
		/* note - FM data out has trouble with non VRA codecs !! */
		pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
		udelay(100);
	}
	
	/* Make sure VRA is enabled, in case we didn't do a
	 * complete codec reset, above */
	pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
	if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
		/* ACLink on, deassert ACLink reset, VSR, SGD data out */
		/* note - FM data out has trouble with non VRA codecs !! */
		pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
		udelay(100);
	}

	/* wait until codec ready */
	end_time = jiffies + msecs_to_jiffies(750);
	do {
		pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
		if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
			break;
		set_current_state(TASK_UNINTERRUPTIBLE);
		schedule_timeout(1);
	} while (time_before(jiffies, end_time));

	if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)
		snd_printk("AC'97 codec is not ready [0x%x]\n", val);

#if 0 /* FIXME: we don't support the second codec yet so skip the detection now.. */
	snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
				 VIA_REG_AC97_SECONDARY_VALID |
				 (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
	end_time = jiffies + msecs_to_jiffies(750);
	snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
				 VIA_REG_AC97_SECONDARY_VALID |
				 (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
	do {
		if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) {
			chip->ac97_secondary = 1;
			goto __ac97_ok2;
		}
		set_current_state(TASK_INTERRUPTIBLE);
		schedule_timeout(1);
	} while (time_before(jiffies, end_time));
	/* This is ok, the most of motherboards have only one codec */

      __ac97_ok2:
#endif

	if (chip->chip_type == TYPE_VIA686) {
		/* route FM trap to IRQ, disable FM trap */
		pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
		/* disable all GPI interrupts */
		outl(0, VIAREG(chip, GPI_INTR));
	}

	if (chip->chip_type != TYPE_VIA686) {
		/* Workaround for Award BIOS bug:
		 * DXS channels don't work properly with VRA if MC97 is disabled.
		 */
		struct pci_dev *pci;
		pci = pci_find_device(0x1106, 0x3068, NULL); /* MC97 */
		if (pci) {
			unsigned char data;
			pci_read_config_byte(pci, 0x44, &data);
			pci_write_config_byte(pci, 0x44, data | 0x40);
		}
	}

	if (chip->chip_type != TYPE_VIA8233A) {
		int i, idx;
		for (idx = 0; idx < 4; idx++) {
			unsigned long port = chip->port + 0x10 * idx;
			for (i = 0; i < 2; i++)
				outb(chip->playback_volume[i], port + VIA_REG_OFS_PLAYBACK_VOLUME_L + i);
		}
	}

	return 0;
}

#ifdef CONFIG_PM
/*
 * power management
 */
static int snd_via82xx_suspend(snd_card_t *card, pm_message_t state)
{
	via82xx_t *chip = card->pm_private_data;
	int i;

	for (i = 0; i < 2; i++)
		if (chip->pcms[i])
			snd_pcm_suspend_all(chip->pcms[i]);
	for (i = 0; i < chip->num_devs; i++)
		snd_via82xx_channel_reset(chip, &chip->devs[i]);
	synchronize_irq(chip->irq);
	snd_ac97_suspend(chip->ac97);

	/* save misc values */
	if (chip->chip_type != TYPE_VIA686) {
		pci_read_config_byte(chip->pci, VIA8233_SPDIF_CTRL, &chip->spdif_ctrl_saved);
		chip->capture_src_saved[0] = inb(chip->port + VIA_REG_CAPTURE_CHANNEL);
		chip->capture_src_saved[1] = inb(chip->port + VIA_REG_CAPTURE_CHANNEL + 0x10);
	}

	pci_set_power_state(chip->pci, 3);
	pci_disable_device(chip->pci);
	return 0;
}

static int snd_via82xx_resume(snd_card_t *card)
{
	via82xx_t *chip = card->pm_private_data;
	int i;

	pci_enable_device(chip->pci);
	pci_set_power_state(chip->pci, 0);

	snd_via82xx_chip_init(chip);

	if (chip->chip_type == TYPE_VIA686) {
		if (chip->mpu_port_saved)
			pci_write_config_dword(chip->pci, 0x18, chip->mpu_port_saved | 0x01);
		pci_write_config_byte(chip->pci, VIA_FUNC_ENABLE, chip->legacy_saved);
		pci_write_config_byte(chip->pci, VIA_PNP_CONTROL, chip->legacy_cfg_saved);
	} else {
		pci_write_config_byte(chip->pci, VIA8233_SPDIF_CTRL, chip->spdif_ctrl_saved);
		outb(chip->capture_src_saved[0], chip->port + VIA_REG_CAPTURE_CHANNEL);
		outb(chip->capture_src_saved[1], chip->port + VIA_REG_CAPTURE_CHANNEL + 0x10);
	}

	snd_ac97_resume(chip->ac97);

	for (i = 0; i < chip->num_devs; i++)
		snd_via82xx_channel_reset(chip, &chip->devs[i]);

	return 0;
}
#endif /* CONFIG_PM */

static int snd_via82xx_free(via82xx_t *chip)
{
	unsigned int i;

	if (chip->irq < 0)
		goto __end_hw;
	/* disable interrupts */
	for (i = 0; i < chip->num_devs; i++)
		snd_via82xx_channel_reset(chip, &chip->devs[i]);
	synchronize_irq(chip->irq);
      __end_hw:
	if (chip->irq >= 0)
		free_irq(chip->irq, (void *)chip);
	if (chip->mpu_res) {
		release_resource(chip->mpu_res);
		kfree_nocheck(chip->mpu_res);
	}
	pci_release_regions(chip->pci);

	if (chip->chip_type == TYPE_VIA686) {
		snd_via686_free_gameport(chip);
		pci_write_config_byte(chip->pci, VIA_FUNC_ENABLE, chip->old_legacy);
		pci_write_config_byte(chip->pci, VIA_PNP_CONTROL, chip->old_legacy_cfg);
	}
	pci_disable_device(chip->pci);
	kfree(chip);
	return 0;
}

static int snd_via82xx_dev_free(snd_device_t *device)
{
	via82xx_t *chip = device->device_data;
	return snd_via82xx_free(chip);
}

static int __devinit snd_via82xx_create(snd_card_t * card,
					struct pci_dev *pci,
					int chip_type,
					int revision,
					unsigned int ac97_clock,
					via82xx_t ** r_via)
{
	via82xx_t *chip;
	int err;
        static snd_device_ops_t ops = {
		.dev_free =	snd_via82xx_dev_free,
        };

	if ((err = pci_enable_device(pci)) < 0)
		return err;

	if ((chip = kcalloc(1, sizeof(*chip), GFP_KERNEL)) == NULL) {
		pci_disable_device(pci);
		return -ENOMEM;
	}

	chip->chip_type = chip_type;
	chip->revision = revision;

	spin_lock_init(&chip->reg_lock);
	spin_lock_init(&chip->rates[0].lock);
	spin_lock_init(&chip->rates[1].lock);
	chip->card = card;
	chip->pci = pci;
	chip->irq = -1;

	pci_read_config_byte(pci, VIA_FUNC_ENABLE, &chip->old_legacy);
	pci_read_config_byte(pci, VIA_PNP_CONTROL, &chip->old_legacy_cfg);
	pci_write_config_byte(chip->pci, VIA_FUNC_ENABLE,
			      chip->old_legacy & ~(VIA_FUNC_ENABLE_SB|VIA_FUNC_ENABLE_FM));

	if ((err = pci_request_regions(pci, card->driver)) < 0) {
		kfree(chip);
		pci_disable_device(pci);
		return err;
	}
	chip->port = pci_resource_start(pci, 0);
	if (request_irq(pci->irq, snd_via82xx_interrupt, SA_INTERRUPT|SA_SHIRQ,
			card->driver, (void *)chip)) {
		snd_printk("unable to grab IRQ %d\n", pci->irq);
		snd_via82xx_free(chip);
		return -EBUSY;
	}
	chip->irq = pci->irq;
	if (ac97_clock >= 8000 && ac97_clock <= 48000)
		chip->ac97_clock = ac97_clock;
	synchronize_irq(chip->irq);

	if ((err = snd_via82xx_chip_init(chip)) < 0) {
		snd_via82xx_free(chip);
		return err;
	}

	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
		snd_via82xx_free(chip);
		return err;
	}

	/* The 8233 ac97 controller does not implement the master bit
	 * in the pci command register. IMHO this is a violation of the PCI spec.
	 * We call pci_set_master here because it does not hurt. */
	pci_set_master(pci);

	snd_card_set_dev(card, &pci->dev);

	*r_via = chip;
	return 0;
}

struct via823x_info {
	int revision;
	char *name;
	int type;
};
static struct via823x_info via823x_cards[] __devinitdata = {
	{ VIA_REV_PRE_8233, "VIA 8233-Pre", TYPE_VIA8233 },
	{ VIA_REV_8233C, "VIA 8233C", TYPE_VIA8233 },
	{ VIA_REV_8233, "VIA 8233", TYPE_VIA8233 },
	{ VIA_REV_8233A, "VIA 8233A", TYPE_VIA8233A },
	{ VIA_REV_8235, "VIA 8235", TYPE_VIA8233 },
	{ VIA_REV_8237, "VIA 8237", TYPE_VIA8233 },
};

/*
 * auto detection of DXS channel supports.
 */
struct dxs_whitelist {
	unsigned short subvendor;
	unsigned short subdevice; 
	unsigned short mask; 
	short action;	/* new dxs_support value */
};

static int __devinit check_dxs_list(struct pci_dev *pci)
{
	static struct dxs_whitelist whitelist[] = {
		{ .subvendor = 0x1005, .subdevice = 0x4710, .action = VIA_DXS_ENABLE }, /* Avance Logic Mobo */
		{ .subvendor = 0x1019, .subdevice = 0x0996, .action = VIA_DXS_48K },
		{ .subvendor = 0x1019, .subdevice = 0x0a81, .action = VIA_DXS_NO_VRA }, /* ECS K7VTA3 v8.0 */
		{ .subvendor = 0x1019, .subdevice = 0x0a85, .action = VIA_DXS_NO_VRA }, /* ECS L7VMM2 */
		{ .subvendor = 0x1025, .subdevice = 0x0033, .action = VIA_DXS_NO_VRA }, /* Acer Inspire 1353LM */
		{ .subvendor = 0x1025, .subdevice = 0x0046, .action = VIA_DXS_SRC }, /* Acer Aspire 1524 WLMi */
		{ .subvendor = 0x1043, .subdevice = 0x8095, .action = VIA_DXS_NO_VRA }, /* ASUS A7V8X (FIXME: possibly VIA_DXS_ENABLE?)*/
		{ .subvendor = 0x1043, .subdevice = 0x80a1, .action = VIA_DXS_NO_VRA }, /* ASUS A7V8-X */
		{ .subvendor = 0x1043, .subdevice = 0x80b0, .action = VIA_DXS_NO_VRA }, /* ASUS A7V600 & K8V*/ 
		{ .subvendor = 0x1043, .subdevice = 0x812a, .action = VIA_DXS_SRC    }, /* ASUS A8V Deluxe */ 
		{ .subvendor = 0x1071, .subdevice = 0x8375, .action = VIA_DXS_NO_VRA }, /* Vobis/Yakumo/Mitac notebook */
		{ .subvendor = 0x1071, .subdevice = 0x8399, .action = VIA_DXS_NO_VRA }, /* Umax AB 595T (VIA K8N800A - VT8237) */
		{ .subvendor = 0x10cf, .subdevice = 0x118e, .action = VIA_DXS_ENABLE }, /* FSC laptop */
		{ .subvendor = 0x1106, .subdevice = 0x4161, .action = VIA_DXS_NO_VRA }, /* ASRock K7VT2 */
		{ .subvendor = 0x1106, .subdevice = 0x4552, .action = VIA_DXS_NO_VRA }, /* QDI Kudoz 7X/600-6AL */
		{ .subvendor = 0x1106, .subdevice = 0xaa01, .action = VIA_DXS_NO_VRA }, /* EPIA MII */
		{ .subvendor = 0x1106, .subdevice = 0xc001, .action = VIA_DXS_SRC }, /* Insight P4-ITX */
		{ .subvendor = 0x1297, .subdevice = 0xa232, .action = VIA_DXS_ENABLE }, /* Shuttle ?? */
		{ .subvendor = 0x1297, .subdevice = 0xc160, .action = VIA_DXS_ENABLE }, /* Shuttle SK41G */
		{ .subvendor = 0x1458, .subdevice = 0xa002, .action = VIA_DXS_ENABLE }, /* Gigabyte GA-7VAXP */
		{ .subvendor = 0x1462, .subdevice = 0x0080, .action = VIA_DXS_SRC }, /* MSI K8T Neo-FIS2R */
		{ .subvendor = 0x1462, .subdevice = 0x3800, .action = VIA_DXS_ENABLE }, /* MSI KT266 */
		{ .subvendor = 0x1462, .subdevice = 0x5901, .action = VIA_DXS_NO_VRA }, /* MSI KT6 Delta-SR */
		{ .subvendor = 0x1462, .subdevice = 0x7023, .action = VIA_DXS_NO_VRA }, /* MSI K8T Neo2-FI */
		{ .subvendor = 0x1462, .subdevice = 0x7120, .action = VIA_DXS_ENABLE }, /* MSI KT4V */
		{ .subvendor = 0x1462, .subdevice = 0x7142, .action = VIA_DXS_ENABLE }, /* MSI K8MM-V */
		{ .subvendor = 0x147b, .subdevice = 0x1401, .action = VIA_DXS_ENABLE }, /* ABIT KD7(-RAID) */
		{ .subvendor = 0x147b, .subdevice = 0x1411, .action = VIA_DXS_ENABLE }, /* ABIT VA-20 */
		{ .subvendor = 0x147b, .subdevice = 0x1413, .action = VIA_DXS_ENABLE }, /* ABIT KV8 Pro */
		{ .subvendor = 0x147b, .subdevice = 0x1415, .action = VIA_DXS_NO_VRA }, /* Abit AV8 */
		{ .subvendor = 0x14ff, .subdevice = 0x0403, .action = VIA_DXS_ENABLE }, /* Twinhead mobo */
		{ .subvendor = 0x14ff, .subdevice = 0x0408, .action = VIA_DXS_SRC }, /* Twinhead laptop */
		{ .subvendor = 0x1584, .subdevice = 0x8120, .action = VIA_DXS_ENABLE }, /* Gericom/Targa/Vobis/Uniwill laptop */
		{ .subvendor = 0x1584, .subdevice = 0x8123, .action = VIA_DXS_NO_VRA }, /* Uniwill (Targa Visionary XP-210) */
		{ .subvendor = 0x161f, .subdevice = 0x202b, .action = VIA_DXS_NO_VRA }, /* Amira Note book */
		{ .subvendor = 0x161f, .subdevice = 0x2032, .action = VIA_DXS_48K }, /* m680x machines */
		{ .subvendor = 0x1631, .subdevice = 0xe004, .action = VIA_DXS_ENABLE }, /* Easy Note 3174, Packard Bell */
		{ .subvendor = 0x1695, .subdevice = 0x3005, .action = VIA_DXS_ENABLE }, /* EPoX EP-8K9A */
		{ .subvendor = 0x1849, .subdevice = 0x3059, .action = VIA_DXS_NO_VRA }, /* ASRock K7VM2 */
		{ .subvendor = 0x1919, .subdevice = 0x200a, .action = VIA_DXS_NO_VRA }, /* Soltek SL-K8Tpro-939 */
		{ .subvendor = 0x4005, .subdevice = 0x4710, .action = VIA_DXS_SRC },	/* MSI K7T266 Pro2 (MS-6380 V2.0) BIOS 3.7 */
		{ } /* terminator */
	};
	struct dxs_whitelist *w;
	unsigned short subsystem_vendor;
	unsigned short subsystem_device;

	pci_read_config_word(pci, PCI_SUBSYSTEM_VENDOR_ID, &subsystem_vendor);
	pci_read_config_word(pci, PCI_SUBSYSTEM_ID, &subsystem_device);

	for (w = whitelist; w->subvendor; w++) {
		if (w->subvendor != subsystem_vendor)
			continue;
		if (w->mask) {
			if ((w->mask & subsystem_device) == w->subdevice)
				return w->action;
		} else {
			if (subsystem_device == w->subdevice)
				return w->action;
		}
	}

	/*
	 * not detected, try 48k rate only to be sure.
	 */
	printk(KERN_INFO "via82xx: Assuming DXS channels with 48k fixed sample rate.\n");
	printk(KERN_INFO "         Please try dxs_support=5 option\n");
	printk(KERN_INFO "         and report if it works on your machine.\n");
	printk(KERN_INFO "         For more details, read ALSA-Configuration.txt.\n");
	return VIA_DXS_48K;
};

static int __devinit snd_via82xx_probe(struct pci_dev *pci,
				       const struct pci_device_id *pci_id)
{
	static int dev;
	snd_card_t *card;
	via82xx_t *chip;
	unsigned char revision;
	int chip_type = 0, card_type;
	unsigned int i;
	int err;

	if (dev >= SNDRV_CARDS)
		return -ENODEV;
	if (!enable[dev]) {
		dev++;
		return -ENOENT;
	}

	card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
	if (card == NULL)
		return -ENOMEM;

	card_type = pci_id->driver_data;
	pci_read_config_byte(pci, PCI_REVISION_ID, &revision);
	switch (card_type) {
	case TYPE_CARD_VIA686:
		strcpy(card->driver, "VIA686A");
		sprintf(card->shortname, "VIA 82C686A/B rev%x", revision);
		chip_type = TYPE_VIA686;
		break;
	case TYPE_CARD_VIA8233:
		chip_type = TYPE_VIA8233;
		sprintf(card->shortname, "VIA 823x rev%x", revision);
		for (i = 0; i < ARRAY_SIZE(via823x_cards); i++) {
			if (revision == via823x_cards[i].revision) {
				chip_type = via823x_cards[i].type;
				strcpy(card->shortname, via823x_cards[i].name);
				break;
			}
		}
		if (chip_type != TYPE_VIA8233A) {
			if (dxs_support[dev] == VIA_DXS_AUTO)
				dxs_support[dev] = check_dxs_list(pci);
			/* force to use VIA8233 or 8233A model according to
			 * dxs_support module option
			 */
			if (dxs_support[dev] == VIA_DXS_DISABLE)
				chip_type = TYPE_VIA8233A;
			else
				chip_type = TYPE_VIA8233;
		}
		if (chip_type == TYPE_VIA8233A)
			strcpy(card->driver, "VIA8233A");
		else if (revision >= VIA_REV_8237)
			strcpy(card->driver, "VIA8237"); /* no slog assignment */
		else
			strcpy(card->driver, "VIA8233");
		break;
	default:
		snd_printk(KERN_ERR "invalid card type %d\n", card_type);
		err = -EINVAL;
		goto __error;
	}
		
	if ((err = snd_via82xx_create(card, pci, chip_type, revision, ac97_clock[dev], &chip)) < 0)
		goto __error;
	if ((err = snd_via82xx_mixer_new(chip, ac97_quirk[dev])) < 0)
		goto __error;

	if (chip_type == TYPE_VIA686) {
		if ((err = snd_via686_pcm_new(chip)) < 0 ||
		    (err = snd_via686_init_misc(chip, dev)) < 0)
			goto __error;
	} else {
		if (chip_type == TYPE_VIA8233A) {
			if ((err = snd_via8233a_pcm_new(chip)) < 0)
				goto __error;
			// chip->dxs_fixed = 1; /* FIXME: use 48k for DXS #3? */
		} else {
			if ((err = snd_via8233_pcm_new(chip)) < 0)
				goto __error;
			if (dxs_support[dev] == VIA_DXS_48K)
				chip->dxs_fixed = 1;
			else if (dxs_support[dev] == VIA_DXS_NO_VRA)
				chip->no_vra = 1;
			else if (dxs_support[dev] == VIA_DXS_SRC) {
				chip->no_vra = 1;
				chip->dxs_src = 1;
			}
		}
		if ((err = snd_via8233_init_misc(chip, dev)) < 0)
			goto __error;
	}

	snd_card_set_pm_callback(card, snd_via82xx_suspend, snd_via82xx_resume, chip);

	/* disable interrupts */
	for (i = 0; i < chip->num_devs; i++)
		snd_via82xx_channel_reset(chip, &chip->devs[i]);

	snprintf(card->longname, sizeof(card->longname),
		 "%s with %s at %#lx, irq %d", card->shortname,
		 snd_ac97_get_short_name(chip->ac97), chip->port, chip->irq);

	snd_via82xx_proc_init(chip);

	if ((err = snd_card_register(card)) < 0) {
		snd_card_free(card);
		return err;
	}
	pci_set_drvdata(pci, card);
	dev++;
	return 0;

 __error:
	snd_card_free(card);
	return err;
}

static void __devexit snd_via82xx_remove(struct pci_dev *pci)
{
	snd_card_free(pci_get_drvdata(pci));
	pci_set_drvdata(pci, NULL);
}

static struct pci_driver driver = {
	.name = "VIA 82xx Audio",
	.id_table = snd_via82xx_ids,
	.probe = snd_via82xx_probe,
	.remove = __devexit_p(snd_via82xx_remove),
	SND_PCI_PM_CALLBACKS
};

static int __init alsa_card_via82xx_init(void)
{
	return pci_register_driver(&driver);
}

static void __exit alsa_card_via82xx_exit(void)
{
	pci_unregister_driver(&driver);
}

module_init(alsa_card_via82xx_init)
module_exit(alsa_card_via82xx_exit)