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   1 /*
   2  *   ALSA modem driver for VIA VT82xx (South Bridge)
   3  *
   4  *   VT82C686A/B/C, VT8233A/C, VT8235
   5  *
   6  *      Copyright (c) 2000 Jaroslav Kysela <perex@suse.cz>
   7  *                         Tjeerd.Mulder <Tjeerd.Mulder@fujitsu-siemens.com>
   8  *                    2002 Takashi Iwai <tiwai@suse.de>
   9  *
  10  *   This program is free software; you can redistribute it and/or modify
  11  *   it under the terms of the GNU General Public License as published by
  12  *   the Free Software Foundation; either version 2 of the License, or
  13  *   (at your option) any later version.
  14  *
  15  *   This program is distributed in the hope that it will be useful,
  16  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *   GNU General Public License for more details.
  19  *
  20  *   You should have received a copy of the GNU General Public License
  21  *   along with this program; if not, write to the Free Software
  22  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  23  *
  24  */
  25
  26 /*
  27  * Changes:
  28  *
  29  * Sep. 2,  2004  Sasha Khapyorsky <sashak@smlink.com>
  30  *      Modified from original audio driver 'via82xx.c' to support AC97
  31  *      modems.
  32  */
  33
  34 #include <sound/driver.h>
  35 #include <asm/io.h>
  36 #include <linux/delay.h>
  37 #include <linux/interrupt.h>
  38 #include <linux/init.h>
  39 #include <linux/pci.h>
  40 #include <linux/slab.h>
  41 #include <linux/moduleparam.h>
  42 #include <sound/core.h>
  43 #include <sound/pcm.h>
  44 #include <sound/pcm_params.h>
  45 #include <sound/info.h>
  46 #include <sound/ac97_codec.h>
  47 #include <sound/initval.h>
  48
  49 #if 0
  50 #define POINTER_DEBUG
  51 #endif
  52
  53 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
  54 MODULE_DESCRIPTION("VIA VT82xx modem");
  55 MODULE_LICENSE("GPL");
  56 MODULE_SUPPORTED_DEVICE("{{VIA,VT82C686A/B/C modem,pci}}");
  57
  58 static int index = -2; /* Exclude the first card */
  59 static char *id = SNDRV_DEFAULT_STR1;   /* ID for this card */
  60 static int ac97_clock = 48000;
  61
  62 module_param(index, int, 0444);
  63 MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge.");
  64 module_param(id, charp, 0444);
  65 MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge.");
  66 module_param(ac97_clock, int, 0444);
  67 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
  68
  69
  70 /*
  71  *  Direct registers
  72  */
  73
  74 #define VIAREG(via, x) ((via)->port + VIA_REG_##x)
  75 #define VIADEV_REG(viadev, x) ((viadev)->port + VIA_REG_##x)
  76
  77 /* common offsets */
  78 #define VIA_REG_OFFSET_STATUS           0x00    /* byte - channel status */
  79 #define   VIA_REG_STAT_ACTIVE           0x80    /* RO */
  80 #define   VIA_REG_STAT_PAUSED           0x40    /* RO */
  81 #define   VIA_REG_STAT_TRIGGER_QUEUED   0x08    /* RO */
  82 #define   VIA_REG_STAT_STOPPED          0x04    /* RWC */
  83 #define   VIA_REG_STAT_EOL              0x02    /* RWC */
  84 #define   VIA_REG_STAT_FLAG             0x01    /* RWC */
  85 #define VIA_REG_OFFSET_CONTROL          0x01    /* byte - channel control */
  86 #define   VIA_REG_CTRL_START            0x80    /* WO */
  87 #define   VIA_REG_CTRL_TERMINATE        0x40    /* WO */
  88 #define   VIA_REG_CTRL_AUTOSTART        0x20
  89 #define   VIA_REG_CTRL_PAUSE            0x08    /* RW */
  90 #define   VIA_REG_CTRL_INT_STOP         0x04
  91 #define   VIA_REG_CTRL_INT_EOL          0x02
  92 #define   VIA_REG_CTRL_INT_FLAG         0x01
  93 #define   VIA_REG_CTRL_RESET            0x01    /* RW - probably reset? undocumented */
  94 #define   VIA_REG_CTRL_INT (VIA_REG_CTRL_INT_FLAG | VIA_REG_CTRL_INT_EOL | VIA_REG_CTRL_AUTOSTART)
  95 #define VIA_REG_OFFSET_TYPE             0x02    /* byte - channel type (686 only) */
  96 #define   VIA_REG_TYPE_AUTOSTART        0x80    /* RW - autostart at EOL */
  97 #define   VIA_REG_TYPE_16BIT            0x20    /* RW */
  98 #define   VIA_REG_TYPE_STEREO           0x10    /* RW */
  99 #define   VIA_REG_TYPE_INT_LLINE        0x00
 100 #define   VIA_REG_TYPE_INT_LSAMPLE      0x04
 101 #define   VIA_REG_TYPE_INT_LESSONE      0x08
 102 #define   VIA_REG_TYPE_INT_MASK         0x0c
 103 #define   VIA_REG_TYPE_INT_EOL          0x02
 104 #define   VIA_REG_TYPE_INT_FLAG         0x01
 105 #define VIA_REG_OFFSET_TABLE_PTR        0x04    /* dword - channel table pointer */
 106 #define VIA_REG_OFFSET_CURR_PTR         0x04    /* dword - channel current pointer */
 107 #define VIA_REG_OFFSET_STOP_IDX         0x08    /* dword - stop index, channel type, sample rate */
 108 #define VIA_REG_OFFSET_CURR_COUNT       0x0c    /* dword - channel current count (24 bit) */
 109 #define VIA_REG_OFFSET_CURR_INDEX       0x0f    /* byte - channel current index (for via8233 only) */
 110
 111 #define DEFINE_VIA_REGSET(name,val) \
 112 enum {\
 113         VIA_REG_##name##_STATUS         = (val),\
 114         VIA_REG_##name##_CONTROL        = (val) + 0x01,\
 115         VIA_REG_##name##_TYPE           = (val) + 0x02,\
 116         VIA_REG_##name##_TABLE_PTR      = (val) + 0x04,\
 117         VIA_REG_##name##_CURR_PTR       = (val) + 0x04,\
 118         VIA_REG_##name##_STOP_IDX       = (val) + 0x08,\
 119         VIA_REG_##name##_CURR_COUNT     = (val) + 0x0c,\
 120 }
 121
 122 /* modem block */
 123 DEFINE_VIA_REGSET(MO, 0x40);
 124 DEFINE_VIA_REGSET(MI, 0x50);
 125
 126 /* AC'97 */
 127 #define VIA_REG_AC97                    0x80    /* dword */
 128 #define   VIA_REG_AC97_CODEC_ID_MASK    (3<<30)
 129 #define   VIA_REG_AC97_CODEC_ID_SHIFT   30
 130 #define   VIA_REG_AC97_CODEC_ID_PRIMARY 0x00
 131 #define   VIA_REG_AC97_CODEC_ID_SECONDARY 0x01
 132 #define   VIA_REG_AC97_SECONDARY_VALID  (1<<27)
 133 #define   VIA_REG_AC97_PRIMARY_VALID    (1<<25)
 134 #define   VIA_REG_AC97_BUSY             (1<<24)
 135 #define   VIA_REG_AC97_READ             (1<<23)
 136 #define   VIA_REG_AC97_CMD_SHIFT        16
 137 #define   VIA_REG_AC97_CMD_MASK         0x7e
 138 #define   VIA_REG_AC97_DATA_SHIFT       0
 139 #define   VIA_REG_AC97_DATA_MASK        0xffff
 140
 141 #define VIA_REG_SGD_SHADOW              0x84    /* dword */
 142 #define   VIA_REG_SGD_STAT_PB_FLAG      (1<<0)
 143 #define   VIA_REG_SGD_STAT_CP_FLAG      (1<<1)
 144 #define   VIA_REG_SGD_STAT_FM_FLAG      (1<<2)
 145 #define   VIA_REG_SGD_STAT_PB_EOL       (1<<4)
 146 #define   VIA_REG_SGD_STAT_CP_EOL       (1<<5)
 147 #define   VIA_REG_SGD_STAT_FM_EOL       (1<<6)
 148 #define   VIA_REG_SGD_STAT_PB_STOP      (1<<8)
 149 #define   VIA_REG_SGD_STAT_CP_STOP      (1<<9)
 150 #define   VIA_REG_SGD_STAT_FM_STOP      (1<<10)
 151 #define   VIA_REG_SGD_STAT_PB_ACTIVE    (1<<12)
 152 #define   VIA_REG_SGD_STAT_CP_ACTIVE    (1<<13)
 153 #define   VIA_REG_SGD_STAT_FM_ACTIVE    (1<<14)
 154 #define   VIA_REG_SGD_STAT_MR_FLAG      (1<<16)
 155 #define   VIA_REG_SGD_STAT_MW_FLAG      (1<<17)
 156 #define   VIA_REG_SGD_STAT_MR_EOL       (1<<20)
 157 #define   VIA_REG_SGD_STAT_MW_EOL       (1<<21)
 158 #define   VIA_REG_SGD_STAT_MR_STOP      (1<<24)
 159 #define   VIA_REG_SGD_STAT_MW_STOP      (1<<25)
 160 #define   VIA_REG_SGD_STAT_MR_ACTIVE    (1<<28)
 161 #define   VIA_REG_SGD_STAT_MW_ACTIVE    (1<<29)
 162
 163 #define VIA_REG_GPI_STATUS              0x88
 164 #define VIA_REG_GPI_INTR                0x8c
 165
 166 #define VIA_TBL_BIT_FLAG        0x40000000
 167 #define VIA_TBL_BIT_EOL         0x80000000
 168
 169 /* pci space */
 170 #define VIA_ACLINK_STAT         0x40
 171 #define  VIA_ACLINK_C11_READY   0x20
 172 #define  VIA_ACLINK_C10_READY   0x10
 173 #define  VIA_ACLINK_C01_READY   0x04 /* secondary codec ready */
 174 #define  VIA_ACLINK_LOWPOWER    0x02 /* low-power state */
 175 #define  VIA_ACLINK_C00_READY   0x01 /* primary codec ready */
 176 #define VIA_ACLINK_CTRL         0x41
 177 #define  VIA_ACLINK_CTRL_ENABLE 0x80 /* 0: disable, 1: enable */
 178 #define  VIA_ACLINK_CTRL_RESET  0x40 /* 0: assert, 1: de-assert */
 179 #define  VIA_ACLINK_CTRL_SYNC   0x20 /* 0: release SYNC, 1: force SYNC hi */
 180 #define  VIA_ACLINK_CTRL_SDO    0x10 /* 0: release SDO, 1: force SDO hi */
 181 #define  VIA_ACLINK_CTRL_VRA    0x08 /* 0: disable VRA, 1: enable VRA */
 182 #define  VIA_ACLINK_CTRL_PCM    0x04 /* 0: disable PCM, 1: enable PCM */
 183 #define  VIA_ACLINK_CTRL_FM     0x02 /* via686 only */
 184 #define  VIA_ACLINK_CTRL_SB     0x01 /* via686 only */
 185 #define  VIA_ACLINK_CTRL_INIT   (VIA_ACLINK_CTRL_ENABLE|\
 186                                  VIA_ACLINK_CTRL_RESET|\
 187                                  VIA_ACLINK_CTRL_PCM)
 188 #define VIA_FUNC_ENABLE         0x42
 189 #define  VIA_FUNC_MIDI_PNP      0x80 /* FIXME: it's 0x40 in the datasheet! */
 190 #define  VIA_FUNC_MIDI_IRQMASK  0x40 /* FIXME: not documented! */
 191 #define  VIA_FUNC_RX2C_WRITE    0x20
 192 #define  VIA_FUNC_SB_FIFO_EMPTY 0x10
 193 #define  VIA_FUNC_ENABLE_GAME   0x08
 194 #define  VIA_FUNC_ENABLE_FM     0x04
 195 #define  VIA_FUNC_ENABLE_MIDI   0x02
 196 #define  VIA_FUNC_ENABLE_SB     0x01
 197 #define VIA_PNP_CONTROL         0x43
 198 #define VIA_MC97_CTRL           0x44
 199 #define  VIA_MC97_CTRL_ENABLE   0x80
 200 #define  VIA_MC97_CTRL_SECONDARY 0x40
 201 #define  VIA_MC97_CTRL_INIT     (VIA_MC97_CTRL_ENABLE|\
 202                                  VIA_MC97_CTRL_SECONDARY)
 203
 204
 205 typedef struct _snd_via82xx_modem via82xx_t;
 206 typedef struct via_dev viadev_t;
 207
 208 /*
 209  * pcm stream
 210  */
 211
 212 struct snd_via_sg_table {
 213         unsigned int offset;
 214         unsigned int size;
 215 } ;
 216
 217 #define VIA_TABLE_SIZE  255
 218
 219 struct via_dev {
 220         unsigned int reg_offset;
 221         unsigned long port;
 222         int direction;  /* playback = 0, capture = 1 */
 223         snd_pcm_substream_t *substream;
 224         int running;
 225         unsigned int tbl_entries; /* # descriptors */
 226         struct snd_dma_buffer table;
 227         struct snd_via_sg_table *idx_table;
 228         /* for recovery from the unexpected pointer */
 229         unsigned int lastpos;
 230         unsigned int bufsize;
 231         unsigned int bufsize2;
 232 };
 233
 234 enum { TYPE_CARD_VIA82XX_MODEM = 1 };
 235
 236 #define VIA_MAX_MODEM_DEVS      2
 237
 238 struct _snd_via82xx_modem {
 239         int irq;
 240
 241         unsigned long port;
 242
 243         unsigned int intr_mask; /* SGD_SHADOW mask to check interrupts */
 244
 245         struct pci_dev *pci;
 246         snd_card_t *card;
 247
 248         unsigned int num_devs;
 249         unsigned int playback_devno, capture_devno;
 250         viadev_t devs[VIA_MAX_MODEM_DEVS];
 251
 252         snd_pcm_t *pcms[2];
 253
 254         ac97_bus_t *ac97_bus;
 255         ac97_t *ac97;
 256         unsigned int ac97_clock;
 257         unsigned int ac97_secondary;    /* secondary AC'97 codec is present */
 258
 259         spinlock_t reg_lock;
 260         snd_info_entry_t *proc_entry;
 261 };
 262
 263 static struct pci_device_id snd_via82xx_modem_ids[] = {
 264         { 0x1106, 0x3068, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPE_CARD_VIA82XX_MODEM, },
 265         { 0, }
 266 };
 267
 268 MODULE_DEVICE_TABLE(pci, snd_via82xx_modem_ids);
 269
 270 /*
 271  */
 272
 273 /*
 274  * allocate and initialize the descriptor buffers
 275  * periods = number of periods
 276  * fragsize = period size in bytes
 277  */
 278 static int build_via_table(viadev_t *dev, snd_pcm_substream_t *substream,
 279                            struct pci_dev *pci,
 280                            unsigned int periods, unsigned int fragsize)
 281 {
 282         unsigned int i, idx, ofs, rest;
 283         via82xx_t *chip = snd_pcm_substream_chip(substream);
 284         struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
 285
 286         if (dev->table.area == NULL) {
 287                 /* the start of each lists must be aligned to 8 bytes,
 288                  * but the kernel pages are much bigger, so we don't care
 289                  */
 290                 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
 291                                         PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8),
 292                                         &dev->table) < 0)
 293                         return -ENOMEM;
 294         }
 295         if (! dev->idx_table) {
 296                 dev->idx_table = kmalloc(sizeof(*dev->idx_table) * VIA_TABLE_SIZE, GFP_KERNEL);
 297                 if (! dev->idx_table)
 298                         return -ENOMEM;
 299         }
 300
 301         /* fill the entries */
 302         idx = 0;
 303         ofs = 0;
 304         for (i = 0; i < periods; i++) {
 305                 rest = fragsize;
 306                 /* fill descriptors for a period.
 307                  * a period can be split to several descriptors if it's
 308                  * over page boundary.
 309                  */
 310                 do {
 311                         unsigned int r;
 312                         unsigned int flag;
 313
 314                         if (idx >= VIA_TABLE_SIZE) {
 315                                 snd_printk(KERN_ERR "via82xx: too much table size!\n");
 316                                 return -EINVAL;
 317                         }
 318                         ((u32 *)dev->table.area)[idx << 1] = cpu_to_le32((u32)snd_pcm_sgbuf_get_addr(sgbuf, ofs));
 319                         r = PAGE_SIZE - (ofs % PAGE_SIZE);
 320                         if (rest < r)
 321                                 r = rest;
 322                         rest -= r;
 323                         if (! rest) {
 324                                 if (i == periods - 1)
 325                                         flag = VIA_TBL_BIT_EOL; /* buffer boundary */
 326                                 else
 327                                         flag = VIA_TBL_BIT_FLAG; /* period boundary */
 328                         } else
 329                                 flag = 0; /* period continues to the next */
 330                         // printk("via: tbl %d: at %d  size %d (rest %d)\n", idx, ofs, r, rest);
 331                         ((u32 *)dev->table.area)[(idx<<1) + 1] = cpu_to_le32(r | flag);
 332                         dev->idx_table[idx].offset = ofs;
 333                         dev->idx_table[idx].size = r;
 334                         ofs += r;
 335                         idx++;
 336                 } while (rest > 0);
 337         }
 338         dev->tbl_entries = idx;
 339         dev->bufsize = periods * fragsize;
 340         dev->bufsize2 = dev->bufsize / 2;
 341         return 0;
 342 }
 343
 344
 345 static int clean_via_table(viadev_t *dev, snd_pcm_substream_t *substream,
 346                            struct pci_dev *pci)
 347 {
 348         if (dev->table.area) {
 349                 snd_dma_free_pages(&dev->table);
 350                 dev->table.area = NULL;
 351         }
 352         kfree(dev->idx_table);
 353         dev->idx_table = NULL;
 354         return 0;
 355 }
 356
 357 /*
 358  *  Basic I/O
 359  */
 360
 361 static inline unsigned int snd_via82xx_codec_xread(via82xx_t *chip)
 362 {
 363         return inl(VIAREG(chip, AC97));
 364 }
 365
 366 static inline void snd_via82xx_codec_xwrite(via82xx_t *chip, unsigned int val)
 367 {
 368         outl(val, VIAREG(chip, AC97));
 369 }
 370
 371 static int snd_via82xx_codec_ready(via82xx_t *chip, int secondary)
 372 {
 373         unsigned int timeout = 1000;    /* 1ms */
 374         unsigned int val;
 375
 376         while (timeout-- > 0) {
 377                 udelay(1);
 378                 if (!((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY))
 379                         return val & 0xffff;
 380         }
 381         snd_printk(KERN_ERR "codec_ready: codec %i is not ready [0x%x]\n", secondary, snd_via82xx_codec_xread(chip));
 382         return -EIO;
 383 }
 384
 385 static int snd_via82xx_codec_valid(via82xx_t *chip, int secondary)
 386 {
 387         unsigned int timeout = 1000;    /* 1ms */
 388         unsigned int val, val1;
 389         unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
 390                                          VIA_REG_AC97_SECONDARY_VALID;
 391
 392         while (timeout-- > 0) {
 393                 val = snd_via82xx_codec_xread(chip);
 394                 val1 = val & (VIA_REG_AC97_BUSY | stat);
 395                 if (val1 == stat)
 396                         return val & 0xffff;
 397                 udelay(1);
 398         }
 399         return -EIO;
 400 }
 401
 402 static void snd_via82xx_codec_wait(ac97_t *ac97)
 403 {
 404         via82xx_t *chip = ac97->private_data;
 405         int err;
 406         err = snd_via82xx_codec_ready(chip, ac97->num);
 407         /* here we need to wait fairly for long time.. */
 408         msleep(500);
 409 }
 410
 411 static void snd_via82xx_codec_write(ac97_t *ac97,
 412                                     unsigned short reg,
 413                                     unsigned short val)
 414 {
 415         via82xx_t *chip = ac97->private_data;
 416         unsigned int xval;
 417         if(reg == AC97_GPIO_STATUS) {
 418                 outl(val, VIAREG(chip, GPI_STATUS));
 419                 return;
 420         }
 421         xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
 422         xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
 423         xval |= reg << VIA_REG_AC97_CMD_SHIFT;
 424         xval |= val << VIA_REG_AC97_DATA_SHIFT;
 425         snd_via82xx_codec_xwrite(chip, xval);
 426         snd_via82xx_codec_ready(chip, ac97->num);
 427 }
 428
 429 static unsigned short snd_via82xx_codec_read(ac97_t *ac97, unsigned short reg)
 430 {
 431         via82xx_t *chip = ac97->private_data;
 432         unsigned int xval, val = 0xffff;
 433         int again = 0;
 434
 435         xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
 436         xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
 437         xval |= VIA_REG_AC97_READ;
 438         xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
 439         while (1) {
 440                 if (again++ > 3) {
 441                         snd_printk(KERN_ERR "codec_read: codec %i is not valid [0x%x]\n", ac97->num, snd_via82xx_codec_xread(chip));
 442                         return 0xffff;
 443                 }
 444                 snd_via82xx_codec_xwrite(chip, xval);
 445                 udelay (20);
 446                 if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) {
 447                         udelay(25);
 448                         val = snd_via82xx_codec_xread(chip);
 449                         break;
 450                 }
 451         }
 452         return val & 0xffff;
 453 }
 454
 455 static void snd_via82xx_channel_reset(via82xx_t *chip, viadev_t *viadev)
 456 {
 457         outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET,
 458              VIADEV_REG(viadev, OFFSET_CONTROL));
 459         inb(VIADEV_REG(viadev, OFFSET_CONTROL));
 460         udelay(50);
 461         /* disable interrupts */
 462         outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL));
 463         /* clear interrupts */
 464         outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS));
 465         outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */
 466         // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
 467         viadev->lastpos = 0;
 468 }
 469
 470
 471 /*
 472  *  Interrupt handler
 473  */
 474
 475 static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 476 {
 477         via82xx_t *chip = dev_id;
 478         unsigned int status;
 479         unsigned int i;
 480
 481         status = inl(VIAREG(chip, SGD_SHADOW));
 482         if (! (status & chip->intr_mask)) {
 483                 return IRQ_NONE;
 484         }
 485 // _skip_sgd:
 486
 487         /* check status for each stream */
 488         spin_lock(&chip->reg_lock);
 489         for (i = 0; i < chip->num_devs; i++) {
 490                 viadev_t *viadev = &chip->devs[i];
 491                 unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
 492                 c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED);
 493                 if (! c_status)
 494                         continue;
 495                 if (viadev->substream && viadev->running) {
 496                         spin_unlock(&chip->reg_lock);
 497                         snd_pcm_period_elapsed(viadev->substream);
 498                         spin_lock(&chip->reg_lock);
 499                 }
 500                 outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
 501         }
 502         spin_unlock(&chip->reg_lock);
 503         return IRQ_HANDLED;
 504 }
 505
 506 /*
 507  *  PCM callbacks
 508  */
 509
 510 /*
 511  * trigger callback
 512  */
 513 static int snd_via82xx_pcm_trigger(snd_pcm_substream_t * substream, int cmd)
 514 {
 515         via82xx_t *chip = snd_pcm_substream_chip(substream);
 516         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 517         unsigned char val = 0;
 518
 519         switch (cmd) {
 520         case SNDRV_PCM_TRIGGER_START:
 521         case SNDRV_PCM_TRIGGER_SUSPEND:
 522                 val |= VIA_REG_CTRL_START;
 523                 viadev->running = 1;
 524                 break;
 525         case SNDRV_PCM_TRIGGER_STOP:
 526                 val = VIA_REG_CTRL_TERMINATE;
 527                 viadev->running = 0;
 528                 break;
 529         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 530                 val |= VIA_REG_CTRL_PAUSE;
 531                 viadev->running = 0;
 532                 break;
 533         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 534                 viadev->running = 1;
 535                 break;
 536         default:
 537                 return -EINVAL;
 538         }
 539         outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
 540         if (cmd == SNDRV_PCM_TRIGGER_STOP)
 541                 snd_via82xx_channel_reset(chip, viadev);
 542         return 0;
 543 }
 544
 545 /*
 546  * pointer callbacks
 547  */
 548
 549 /*
 550  * calculate the linear position at the given sg-buffer index and the rest count
 551  */
 552
 553 #define check_invalid_pos(viadev,pos) \
 554         ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 || viadev->lastpos < viadev->bufsize2))
 555
 556 static inline unsigned int calc_linear_pos(viadev_t *viadev, unsigned int idx, unsigned int count)
 557 {
 558         unsigned int size, res;
 559
 560         size = viadev->idx_table[idx].size;
 561         res = viadev->idx_table[idx].offset + size - count;
 562
 563         /* check the validity of the calculated position */
 564         if (size < count) {
 565                 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (size = %d, count = %d)\n", (int)size, (int)count);
 566                 res = viadev->lastpos;
 567         } else if (check_invalid_pos(viadev, res)) {
 568 #ifdef POINTER_DEBUG
 569                 printk("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);
 570 #endif
 571                 if (count && size < count) {
 572                         snd_printd(KERN_ERR "invalid via82xx_cur_ptr, using last valid pointer\n");
 573                         res = viadev->lastpos;
 574                 } else {
 575                         if (! count)
 576                                 /* bogus count 0 on the DMA boundary? */
 577                                 res = viadev->idx_table[idx].offset;
 578                         else
 579                                 /* count register returns full size when end of buffer is reached */
 580                                 res = viadev->idx_table[idx].offset + size;
 581                         if (check_invalid_pos(viadev, res)) {
 582                                 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (2), using last valid pointer\n");
 583                                 res = viadev->lastpos;
 584                         }
 585                 }
 586         }
 587         viadev->lastpos = res; /* remember the last position */
 588         if (res >= viadev->bufsize)
 589                 res -= viadev->bufsize;
 590         return res;
 591 }
 592
 593 /*
 594  * get the current pointer on via686
 595  */
 596 static snd_pcm_uframes_t snd_via686_pcm_pointer(snd_pcm_substream_t *substream)
 597 {
 598         via82xx_t *chip = snd_pcm_substream_chip(substream);
 599         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 600         unsigned int idx, ptr, count, res;
 601
 602         snd_assert(viadev->tbl_entries, return 0);
 603         if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
 604                 return 0;
 605
 606         spin_lock(&chip->reg_lock);
 607         count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
 608         /* The via686a does not have the current index register,
 609          * so we need to calculate the index from CURR_PTR.
 610          */
 611         ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
 612         if (ptr <= (unsigned int)viadev->table.addr)
 613                 idx = 0;
 614         else /* CURR_PTR holds the address + 8 */
 615                 idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) % viadev->tbl_entries;
 616         res = calc_linear_pos(viadev, idx, count);
 617         spin_unlock(&chip->reg_lock);
 618
 619         return bytes_to_frames(substream->runtime, res);
 620 }
 621
 622 /*
 623  * hw_params callback:
 624  * allocate the buffer and build up the buffer description table
 625  */
 626 static int snd_via82xx_hw_params(snd_pcm_substream_t * substream,
 627                                  snd_pcm_hw_params_t * hw_params)
 628 {
 629         via82xx_t *chip = snd_pcm_substream_chip(substream);
 630         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 631         int err;
 632
 633         err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 634         if (err < 0)
 635                 return err;
 636         err = build_via_table(viadev, substream, chip->pci,
 637                               params_periods(hw_params),
 638                               params_period_bytes(hw_params));
 639         if (err < 0)
 640                 return err;
 641
 642         snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params));
 643         snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0);
 644
 645         return 0;
 646 }
 647
 648 /*
 649  * hw_free callback:
 650  * clean up the buffer description table and release the buffer
 651  */
 652 static int snd_via82xx_hw_free(snd_pcm_substream_t * substream)
 653 {
 654         via82xx_t *chip = snd_pcm_substream_chip(substream);
 655         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 656
 657         clean_via_table(viadev, substream, chip->pci);
 658         snd_pcm_lib_free_pages(substream);
 659         return 0;
 660 }
 661
 662
 663 /*
 664  * set up the table pointer
 665  */
 666 static void snd_via82xx_set_table_ptr(via82xx_t *chip, viadev_t *viadev)
 667 {
 668         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 669         outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
 670         udelay(20);
 671         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 672 }
 673
 674 /*
 675  * prepare callback for playback and capture
 676  */
 677 static int snd_via82xx_pcm_prepare(snd_pcm_substream_t *substream)
 678 {
 679         via82xx_t *chip = snd_pcm_substream_chip(substream);
 680         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 681
 682         snd_via82xx_channel_reset(chip, viadev);
 683         /* this must be set after channel_reset */
 684         snd_via82xx_set_table_ptr(chip, viadev);
 685         outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG,
 686              VIADEV_REG(viadev, OFFSET_TYPE));
 687         return 0;
 688 }
 689
 690 /*
 691  * pcm hardware definition, identical for both playback and capture
 692  */
 693 static snd_pcm_hardware_t snd_via82xx_hw =
 694 {
 695         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 696                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 697                                  SNDRV_PCM_INFO_MMAP_VALID |
 698                                  /* SNDRV_PCM_INFO_RESUME | */
 699                                  SNDRV_PCM_INFO_PAUSE),
 700         .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
 701         .rates =                SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
 702         .rate_min =             8000,
 703         .rate_max =             16000,
 704         .channels_min =         1,
 705         .channels_max =         1,
 706         .buffer_bytes_max =     128 * 1024,
 707         .period_bytes_min =     32,
 708         .period_bytes_max =     128 * 1024,
 709         .periods_min =          2,
 710         .periods_max =          VIA_TABLE_SIZE / 2,
 711         .fifo_size =            0,
 712 };
 713
 714
 715 /*
 716  * open callback skeleton
 717  */
 718 static int snd_via82xx_modem_pcm_open(via82xx_t *chip, viadev_t *viadev, snd_pcm_substream_t * substream)
 719 {
 720         snd_pcm_runtime_t *runtime = substream->runtime;
 721         int err;
 722         static unsigned int rates[] = { 8000,  9600, 12000, 16000 };
 723         static snd_pcm_hw_constraint_list_t hw_constraints_rates = {
 724                 .count = ARRAY_SIZE(rates),
 725                 .list = rates,
 726                 .mask = 0,
 727         };
 728
 729         runtime->hw = snd_via82xx_hw;
 730
 731         if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates)) < 0)
 732                 return err;
 733
 734         /* we may remove following constaint when we modify table entries
 735            in interrupt */
 736         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 737                 return err;
 738
 739         runtime->private_data = viadev;
 740         viadev->substream = substream;
 741
 742         return 0;
 743 }
 744
 745
 746 /*
 747  * open callback for playback
 748  */
 749 static int snd_via82xx_playback_open(snd_pcm_substream_t * substream)
 750 {
 751         via82xx_t *chip = snd_pcm_substream_chip(substream);
 752         viadev_t *viadev = &chip->devs[chip->playback_devno + substream->number];
 753
 754         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 755 }
 756
 757 /*
 758  * open callback for capture
 759  */
 760 static int snd_via82xx_capture_open(snd_pcm_substream_t * substream)
 761 {
 762         via82xx_t *chip = snd_pcm_substream_chip(substream);
 763         viadev_t *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
 764
 765         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 766 }
 767
 768 /*
 769  * close callback
 770  */
 771 static int snd_via82xx_pcm_close(snd_pcm_substream_t * substream)
 772 {
 773         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 774
 775         viadev->substream = NULL;
 776         return 0;
 777 }
 778
 779
 780 /* via686 playback callbacks */
 781 static snd_pcm_ops_t snd_via686_playback_ops = {
 782         .open =         snd_via82xx_playback_open,
 783         .close =        snd_via82xx_pcm_close,
 784         .ioctl =        snd_pcm_lib_ioctl,
 785         .hw_params =    snd_via82xx_hw_params,
 786         .hw_free =      snd_via82xx_hw_free,
 787         .prepare =      snd_via82xx_pcm_prepare,
 788         .trigger =      snd_via82xx_pcm_trigger,
 789         .pointer =      snd_via686_pcm_pointer,
 790         .page =         snd_pcm_sgbuf_ops_page,
 791 };
 792
 793 /* via686 capture callbacks */
 794 static snd_pcm_ops_t snd_via686_capture_ops = {
 795         .open =         snd_via82xx_capture_open,
 796         .close =        snd_via82xx_pcm_close,
 797         .ioctl =        snd_pcm_lib_ioctl,
 798         .hw_params =    snd_via82xx_hw_params,
 799         .hw_free =      snd_via82xx_hw_free,
 800         .prepare =      snd_via82xx_pcm_prepare,
 801         .trigger =      snd_via82xx_pcm_trigger,
 802         .pointer =      snd_via686_pcm_pointer,
 803         .page =         snd_pcm_sgbuf_ops_page,
 804 };
 805
 806
 807 static void init_viadev(via82xx_t *chip, int idx, unsigned int reg_offset, int direction)
 808 {
 809         chip->devs[idx].reg_offset = reg_offset;
 810         chip->devs[idx].direction = direction;
 811         chip->devs[idx].port = chip->port + reg_offset;
 812 }
 813
 814 /*
 815  * create a pcm instance for via686a/b
 816  */
 817 static int __devinit snd_via686_pcm_new(via82xx_t *chip)
 818 {
 819         snd_pcm_t *pcm;
 820         int err;
 821
 822         chip->playback_devno = 0;
 823         chip->capture_devno = 1;
 824         chip->num_devs = 2;
 825         chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */
 826
 827         err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
 828         if (err < 0)
 829                 return err;
 830         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
 831         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
 832         pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
 833         pcm->private_data = chip;
 834         strcpy(pcm->name, chip->card->shortname);
 835         chip->pcms[0] = pcm;
 836         init_viadev(chip, 0, VIA_REG_MO_STATUS, 0);
 837         init_viadev(chip, 1, VIA_REG_MI_STATUS, 1);
 838
 839         if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
 840                                                          snd_dma_pci_data(chip->pci), 64*1024, 128*1024)) < 0)
 841                 return err;
 842
 843         return 0;
 844 }
 845
 846
 847 /*
 848  *  Mixer part
 849  */
 850
 851
 852 static void snd_via82xx_mixer_free_ac97_bus(ac97_bus_t *bus)
 853 {
 854         via82xx_t *chip = bus->private_data;
 855         chip->ac97_bus = NULL;
 856 }
 857
 858 static void snd_via82xx_mixer_free_ac97(ac97_t *ac97)
 859 {
 860         via82xx_t *chip = ac97->private_data;
 861         chip->ac97 = NULL;
 862 }
 863
 864
 865 static int __devinit snd_via82xx_mixer_new(via82xx_t *chip)
 866 {
 867         ac97_template_t ac97;
 868         int err;
 869         static ac97_bus_ops_t ops = {
 870                 .write = snd_via82xx_codec_write,
 871                 .read = snd_via82xx_codec_read,
 872                 .wait = snd_via82xx_codec_wait,
 873         };
 874
 875         if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
 876                 return err;
 877         chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
 878         chip->ac97_bus->clock = chip->ac97_clock;
 879
 880         memset(&ac97, 0, sizeof(ac97));
 881         ac97.private_data = chip;
 882         ac97.private_free = snd_via82xx_mixer_free_ac97;
 883         ac97.pci = chip->pci;
 884         ac97.scaps = AC97_SCAP_SKIP_AUDIO;
 885         ac97.num = chip->ac97_secondary;
 886
 887         if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
 888                 return err;
 889
 890         return 0;
 891 }
 892
 893
 894 /*
 895  * proc interface
 896  */
 897 static void snd_via82xx_proc_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
 898 {
 899         via82xx_t *chip = entry->private_data;
 900         int i;
 901
 902         snd_iprintf(buffer, "%s\n\n", chip->card->longname);
 903         for (i = 0; i < 0xa0; i += 4) {
 904                 snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
 905         }
 906 }
 907
 908 static void __devinit snd_via82xx_proc_init(via82xx_t *chip)
 909 {
 910         snd_info_entry_t *entry;
 911
 912         if (! snd_card_proc_new(chip->card, "via82xx", &entry))
 913                 snd_info_set_text_ops(entry, chip, 1024, snd_via82xx_proc_read);
 914 }
 915
 916 /*
 917  *
 918  */
 919
 920 static int snd_via82xx_chip_init(via82xx_t *chip)
 921 {
 922         unsigned int val;
 923         unsigned long end_time;
 924         unsigned char pval;
 925
 926         pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval);
 927         if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) {
 928                 pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT);
 929                 udelay(100);
 930         }
 931
 932         pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 933         if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
 934                 /* deassert ACLink reset, force SYNC */
 935                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 936                                       VIA_ACLINK_CTRL_ENABLE |
 937                                       VIA_ACLINK_CTRL_RESET |
 938                                       VIA_ACLINK_CTRL_SYNC);
 939                 udelay(100);
 940 #if 1 /* FIXME: should we do full reset here for all chip models? */
 941                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
 942                 udelay(100);
 943 #else
 944                 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
 945                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 946                                       VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
 947                 udelay(2);
 948 #endif
 949                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 950                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 951                 udelay(100);
 952         }
 953
 954         pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
 955         if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
 956                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 957                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 958                 udelay(100);
 959         }
 960
 961         /* wait until codec ready */
 962         end_time = jiffies + msecs_to_jiffies(750);
 963         do {
 964                 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 965                 if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
 966                         break;
 967                 set_current_state(TASK_UNINTERRUPTIBLE);
 968                 schedule_timeout(1);
 969         } while (time_before(jiffies, end_time));
 970
 971         if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)
 972                 snd_printk("AC'97 codec is not ready [0x%x]\n", val);
 973
 974         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
 975                                  VIA_REG_AC97_SECONDARY_VALID |
 976                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
 977         end_time = jiffies + msecs_to_jiffies(750);
 978         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
 979                                  VIA_REG_AC97_SECONDARY_VALID |
 980                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
 981         do {
 982                 if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) {
 983                         chip->ac97_secondary = 1;
 984                         goto __ac97_ok2;
 985                 }
 986                 set_current_state(TASK_INTERRUPTIBLE);
 987                 schedule_timeout(1);
 988         } while (time_before(jiffies, end_time));
 989         /* This is ok, the most of motherboards have only one codec */
 990
 991       __ac97_ok2:
 992
 993         /* route FM trap to IRQ, disable FM trap */
 994         // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
 995         /* disable all GPI interrupts */
 996         outl(0, VIAREG(chip, GPI_INTR));
 997
 998         return 0;
 999 }
1000
1001 #ifdef CONFIG_PM
1002 /*
1003  * power management
1004  */
1005 static int snd_via82xx_suspend(snd_card_t *card, pm_message_t state)
1006 {
1007         via82xx_t *chip = card->pm_private_data;
1008         int i;
1009
1010         for (i = 0; i < 2; i++)
1011                 if (chip->pcms[i])
1012                         snd_pcm_suspend_all(chip->pcms[i]);
1013         for (i = 0; i < chip->num_devs; i++)
1014                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1015         synchronize_irq(chip->irq);
1016         snd_ac97_suspend(chip->ac97);
1017         pci_set_power_state(chip->pci, 3);
1018         pci_disable_device(chip->pci);
1019         return 0;
1020 }
1021
1022 static int snd_via82xx_resume(snd_card_t *card)
1023 {
1024         via82xx_t *chip = card->pm_private_data;
1025         int i;
1026
1027         pci_enable_device(chip->pci);
1028         pci_set_power_state(chip->pci, 0);
1029         pci_set_master(chip->pci);
1030
1031         snd_via82xx_chip_init(chip);
1032
1033         snd_ac97_resume(chip->ac97);
1034
1035         for (i = 0; i < chip->num_devs; i++)
1036                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1037
1038         return 0;
1039 }
1040 #endif /* CONFIG_PM */
1041
1042 static int snd_via82xx_free(via82xx_t *chip)
1043 {
1044         unsigned int i;
1045
1046         if (chip->irq < 0)
1047                 goto __end_hw;
1048         /* disable interrupts */
1049         for (i = 0; i < chip->num_devs; i++)
1050                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1051         synchronize_irq(chip->irq);
1052       __end_hw:
1053         if (chip->irq >= 0)
1054                 free_irq(chip->irq, (void *)chip);
1055         pci_release_regions(chip->pci);
1056         pci_disable_device(chip->pci);
1057         kfree(chip);
1058         return 0;
1059 }
1060
1061 static int snd_via82xx_dev_free(snd_device_t *device)
1062 {
1063         via82xx_t *chip = device->device_data;
1064         return snd_via82xx_free(chip);
1065 }
1066
1067 static int __devinit snd_via82xx_create(snd_card_t * card,
1068                                         struct pci_dev *pci,
1069                                         int chip_type,
1070                                         int revision,
1071                                         unsigned int ac97_clock,
1072                                         via82xx_t ** r_via)
1073 {
1074         via82xx_t *chip;
1075         int err;
1076         static snd_device_ops_t ops = {
1077                 .dev_free =     snd_via82xx_dev_free,
1078         };
1079
1080         if ((err = pci_enable_device(pci)) < 0)
1081                 return err;
1082
1083         if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) {
1084                 pci_disable_device(pci);
1085                 return -ENOMEM;
1086         }
1087
1088         spin_lock_init(&chip->reg_lock);
1089         chip->card = card;
1090         chip->pci = pci;
1091         chip->irq = -1;
1092
1093         if ((err = pci_request_regions(pci, card->driver)) < 0) {
1094                 kfree(chip);
1095                 pci_disable_device(pci);
1096                 return err;
1097         }
1098         chip->port = pci_resource_start(pci, 0);
1099         if (request_irq(pci->irq, snd_via82xx_interrupt, SA_INTERRUPT|SA_SHIRQ,
1100                         card->driver, (void *)chip)) {
1101                 snd_printk("unable to grab IRQ %d\n", pci->irq);
1102                 snd_via82xx_free(chip);
1103                 return -EBUSY;
1104         }
1105         chip->irq = pci->irq;
1106         if (ac97_clock >= 8000 && ac97_clock <= 48000)
1107                 chip->ac97_clock = ac97_clock;
1108         synchronize_irq(chip->irq);
1109
1110         if ((err = snd_via82xx_chip_init(chip)) < 0) {
1111                 snd_via82xx_free(chip);
1112                 return err;
1113         }
1114
1115         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1116                 snd_via82xx_free(chip);
1117                 return err;
1118         }
1119
1120         /* The 8233 ac97 controller does not implement the master bit
1121          * in the pci command register. IMHO this is a violation of the PCI spec.
1122          * We call pci_set_master here because it does not hurt. */
1123         pci_set_master(pci);
1124
1125         snd_card_set_dev(card, &pci->dev);
1126
1127         *r_via = chip;
1128         return 0;
1129 }
1130
1131
1132 static int __devinit snd_via82xx_probe(struct pci_dev *pci,
1133                                        const struct pci_device_id *pci_id)
1134 {
1135         snd_card_t *card;
1136         via82xx_t *chip;
1137         unsigned char revision;
1138         int chip_type = 0, card_type;
1139         unsigned int i;
1140         int err;
1141
1142         card = snd_card_new(index, id, THIS_MODULE, 0);
1143         if (card == NULL)
1144                 return -ENOMEM;
1145
1146         card_type = pci_id->driver_data;
1147         pci_read_config_byte(pci, PCI_REVISION_ID, &revision);
1148         switch (card_type) {
1149         case TYPE_CARD_VIA82XX_MODEM:
1150                 strcpy(card->driver, "VIA82XX-MODEM");
1151                 sprintf(card->shortname, "VIA 82XX modem");
1152                 break;
1153         default:
1154                 snd_printk(KERN_ERR "invalid card type %d\n", card_type);
1155                 err = -EINVAL;
1156                 goto __error;
1157         }
1158
1159         if ((err = snd_via82xx_create(card, pci, chip_type, revision,
1160                                       ac97_clock, &chip)) < 0)
1161                 goto __error;
1162         if ((err = snd_via82xx_mixer_new(chip)) < 0)
1163                 goto __error;
1164
1165         if ((err = snd_via686_pcm_new(chip)) < 0 )
1166                 goto __error;
1167
1168         snd_card_set_pm_callback(card, snd_via82xx_suspend, snd_via82xx_resume, chip);
1169
1170         /* disable interrupts */
1171         for (i = 0; i < chip->num_devs; i++)
1172                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1173
1174         sprintf(card->longname, "%s at 0x%lx, irq %d",
1175                 card->shortname, chip->port, chip->irq);
1176
1177         snd_via82xx_proc_init(chip);
1178
1179         if ((err = snd_card_register(card)) < 0) {
1180                 snd_card_free(card);
1181                 return err;
1182         }
1183         pci_set_drvdata(pci, card);
1184         return 0;
1185
1186  __error:
1187         snd_card_free(card);
1188         return err;
1189 }
1190
1191 static void __devexit snd_via82xx_remove(struct pci_dev *pci)
1192 {
1193         snd_card_free(pci_get_drvdata(pci));
1194         pci_set_drvdata(pci, NULL);
1195 }
1196
1197 static struct pci_driver driver = {
1198         .name = "VIA 82xx Modem",
1199         .owner = THIS_MODULE,
1200         .id_table = snd_via82xx_modem_ids,
1201         .probe = snd_via82xx_probe,
1202         .remove = __devexit_p(snd_via82xx_remove),
1203         SND_PCI_PM_CALLBACKS
1204 };
1205
1206 static int __init alsa_card_via82xx_init(void)
1207 {
1208         return pci_register_driver(&driver);
1209 }
1210
1211 static void __exit alsa_card_via82xx_exit(void)
1212 {
1213         pci_unregister_driver(&driver);
1214 }
1215
1216 module_init(alsa_card_via82xx_init)
1217 module_exit(alsa_card_via82xx_exit)