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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@alsa-project.org>
  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 /* just for backward compatibility */
  70 static int enable;
  71 module_param(enable, bool, 0444);
  72
  73
  74 /*
  75  *  Direct registers
  76  */
  77
  78 #define VIAREG(via, x) ((via)->port + VIA_REG_##x)
  79 #define VIADEV_REG(viadev, x) ((viadev)->port + VIA_REG_##x)
  80
  81 /* common offsets */
  82 #define VIA_REG_OFFSET_STATUS           0x00    /* byte - channel status */
  83 #define   VIA_REG_STAT_ACTIVE           0x80    /* RO */
  84 #define   VIA_REG_STAT_PAUSED           0x40    /* RO */
  85 #define   VIA_REG_STAT_TRIGGER_QUEUED   0x08    /* RO */
  86 #define   VIA_REG_STAT_STOPPED          0x04    /* RWC */
  87 #define   VIA_REG_STAT_EOL              0x02    /* RWC */
  88 #define   VIA_REG_STAT_FLAG             0x01    /* RWC */
  89 #define VIA_REG_OFFSET_CONTROL          0x01    /* byte - channel control */
  90 #define   VIA_REG_CTRL_START            0x80    /* WO */
  91 #define   VIA_REG_CTRL_TERMINATE        0x40    /* WO */
  92 #define   VIA_REG_CTRL_AUTOSTART        0x20
  93 #define   VIA_REG_CTRL_PAUSE            0x08    /* RW */
  94 #define   VIA_REG_CTRL_INT_STOP         0x04
  95 #define   VIA_REG_CTRL_INT_EOL          0x02
  96 #define   VIA_REG_CTRL_INT_FLAG         0x01
  97 #define   VIA_REG_CTRL_RESET            0x01    /* RW - probably reset? undocumented */
  98 #define   VIA_REG_CTRL_INT (VIA_REG_CTRL_INT_FLAG | VIA_REG_CTRL_INT_EOL | VIA_REG_CTRL_AUTOSTART)
  99 #define VIA_REG_OFFSET_TYPE             0x02    /* byte - channel type (686 only) */
 100 #define   VIA_REG_TYPE_AUTOSTART        0x80    /* RW - autostart at EOL */
 101 #define   VIA_REG_TYPE_16BIT            0x20    /* RW */
 102 #define   VIA_REG_TYPE_STEREO           0x10    /* RW */
 103 #define   VIA_REG_TYPE_INT_LLINE        0x00
 104 #define   VIA_REG_TYPE_INT_LSAMPLE      0x04
 105 #define   VIA_REG_TYPE_INT_LESSONE      0x08
 106 #define   VIA_REG_TYPE_INT_MASK         0x0c
 107 #define   VIA_REG_TYPE_INT_EOL          0x02
 108 #define   VIA_REG_TYPE_INT_FLAG         0x01
 109 #define VIA_REG_OFFSET_TABLE_PTR        0x04    /* dword - channel table pointer */
 110 #define VIA_REG_OFFSET_CURR_PTR         0x04    /* dword - channel current pointer */
 111 #define VIA_REG_OFFSET_STOP_IDX         0x08    /* dword - stop index, channel type, sample rate */
 112 #define VIA_REG_OFFSET_CURR_COUNT       0x0c    /* dword - channel current count (24 bit) */
 113 #define VIA_REG_OFFSET_CURR_INDEX       0x0f    /* byte - channel current index (for via8233 only) */
 114
 115 #define DEFINE_VIA_REGSET(name,val) \
 116 enum {\
 117         VIA_REG_##name##_STATUS         = (val),\
 118         VIA_REG_##name##_CONTROL        = (val) + 0x01,\
 119         VIA_REG_##name##_TYPE           = (val) + 0x02,\
 120         VIA_REG_##name##_TABLE_PTR      = (val) + 0x04,\
 121         VIA_REG_##name##_CURR_PTR       = (val) + 0x04,\
 122         VIA_REG_##name##_STOP_IDX       = (val) + 0x08,\
 123         VIA_REG_##name##_CURR_COUNT     = (val) + 0x0c,\
 124 }
 125
 126 /* modem block */
 127 DEFINE_VIA_REGSET(MO, 0x40);
 128 DEFINE_VIA_REGSET(MI, 0x50);
 129
 130 /* AC'97 */
 131 #define VIA_REG_AC97                    0x80    /* dword */
 132 #define   VIA_REG_AC97_CODEC_ID_MASK    (3<<30)
 133 #define   VIA_REG_AC97_CODEC_ID_SHIFT   30
 134 #define   VIA_REG_AC97_CODEC_ID_PRIMARY 0x00
 135 #define   VIA_REG_AC97_CODEC_ID_SECONDARY 0x01
 136 #define   VIA_REG_AC97_SECONDARY_VALID  (1<<27)
 137 #define   VIA_REG_AC97_PRIMARY_VALID    (1<<25)
 138 #define   VIA_REG_AC97_BUSY             (1<<24)
 139 #define   VIA_REG_AC97_READ             (1<<23)
 140 #define   VIA_REG_AC97_CMD_SHIFT        16
 141 #define   VIA_REG_AC97_CMD_MASK         0x7e
 142 #define   VIA_REG_AC97_DATA_SHIFT       0
 143 #define   VIA_REG_AC97_DATA_MASK        0xffff
 144
 145 #define VIA_REG_SGD_SHADOW              0x84    /* dword */
 146 #define   VIA_REG_SGD_STAT_PB_FLAG      (1<<0)
 147 #define   VIA_REG_SGD_STAT_CP_FLAG      (1<<1)
 148 #define   VIA_REG_SGD_STAT_FM_FLAG      (1<<2)
 149 #define   VIA_REG_SGD_STAT_PB_EOL       (1<<4)
 150 #define   VIA_REG_SGD_STAT_CP_EOL       (1<<5)
 151 #define   VIA_REG_SGD_STAT_FM_EOL       (1<<6)
 152 #define   VIA_REG_SGD_STAT_PB_STOP      (1<<8)
 153 #define   VIA_REG_SGD_STAT_CP_STOP      (1<<9)
 154 #define   VIA_REG_SGD_STAT_FM_STOP      (1<<10)
 155 #define   VIA_REG_SGD_STAT_PB_ACTIVE    (1<<12)
 156 #define   VIA_REG_SGD_STAT_CP_ACTIVE    (1<<13)
 157 #define   VIA_REG_SGD_STAT_FM_ACTIVE    (1<<14)
 158 #define   VIA_REG_SGD_STAT_MR_FLAG      (1<<16)
 159 #define   VIA_REG_SGD_STAT_MW_FLAG      (1<<17)
 160 #define   VIA_REG_SGD_STAT_MR_EOL       (1<<20)
 161 #define   VIA_REG_SGD_STAT_MW_EOL       (1<<21)
 162 #define   VIA_REG_SGD_STAT_MR_STOP      (1<<24)
 163 #define   VIA_REG_SGD_STAT_MW_STOP      (1<<25)
 164 #define   VIA_REG_SGD_STAT_MR_ACTIVE    (1<<28)
 165 #define   VIA_REG_SGD_STAT_MW_ACTIVE    (1<<29)
 166
 167 #define VIA_REG_GPI_STATUS              0x88
 168 #define VIA_REG_GPI_INTR                0x8c
 169
 170 #define VIA_TBL_BIT_FLAG        0x40000000
 171 #define VIA_TBL_BIT_EOL         0x80000000
 172
 173 /* pci space */
 174 #define VIA_ACLINK_STAT         0x40
 175 #define  VIA_ACLINK_C11_READY   0x20
 176 #define  VIA_ACLINK_C10_READY   0x10
 177 #define  VIA_ACLINK_C01_READY   0x04 /* secondary codec ready */
 178 #define  VIA_ACLINK_LOWPOWER    0x02 /* low-power state */
 179 #define  VIA_ACLINK_C00_READY   0x01 /* primary codec ready */
 180 #define VIA_ACLINK_CTRL         0x41
 181 #define  VIA_ACLINK_CTRL_ENABLE 0x80 /* 0: disable, 1: enable */
 182 #define  VIA_ACLINK_CTRL_RESET  0x40 /* 0: assert, 1: de-assert */
 183 #define  VIA_ACLINK_CTRL_SYNC   0x20 /* 0: release SYNC, 1: force SYNC hi */
 184 #define  VIA_ACLINK_CTRL_SDO    0x10 /* 0: release SDO, 1: force SDO hi */
 185 #define  VIA_ACLINK_CTRL_VRA    0x08 /* 0: disable VRA, 1: enable VRA */
 186 #define  VIA_ACLINK_CTRL_PCM    0x04 /* 0: disable PCM, 1: enable PCM */
 187 #define  VIA_ACLINK_CTRL_FM     0x02 /* via686 only */
 188 #define  VIA_ACLINK_CTRL_SB     0x01 /* via686 only */
 189 #define  VIA_ACLINK_CTRL_INIT   (VIA_ACLINK_CTRL_ENABLE|\
 190                                  VIA_ACLINK_CTRL_RESET|\
 191                                  VIA_ACLINK_CTRL_PCM)
 192 #define VIA_FUNC_ENABLE         0x42
 193 #define  VIA_FUNC_MIDI_PNP      0x80 /* FIXME: it's 0x40 in the datasheet! */
 194 #define  VIA_FUNC_MIDI_IRQMASK  0x40 /* FIXME: not documented! */
 195 #define  VIA_FUNC_RX2C_WRITE    0x20
 196 #define  VIA_FUNC_SB_FIFO_EMPTY 0x10
 197 #define  VIA_FUNC_ENABLE_GAME   0x08
 198 #define  VIA_FUNC_ENABLE_FM     0x04
 199 #define  VIA_FUNC_ENABLE_MIDI   0x02
 200 #define  VIA_FUNC_ENABLE_SB     0x01
 201 #define VIA_PNP_CONTROL         0x43
 202 #define VIA_MC97_CTRL           0x44
 203 #define  VIA_MC97_CTRL_ENABLE   0x80
 204 #define  VIA_MC97_CTRL_SECONDARY 0x40
 205 #define  VIA_MC97_CTRL_INIT     (VIA_MC97_CTRL_ENABLE|\
 206                                  VIA_MC97_CTRL_SECONDARY)
 207
 208
 209 typedef struct _snd_via82xx_modem via82xx_t;
 210 typedef struct via_dev viadev_t;
 211
 212 /*
 213  * pcm stream
 214  */
 215
 216 struct snd_via_sg_table {
 217         unsigned int offset;
 218         unsigned int size;
 219 } ;
 220
 221 #define VIA_TABLE_SIZE  255
 222
 223 struct via_dev {
 224         unsigned int reg_offset;
 225         unsigned long port;
 226         int direction;  /* playback = 0, capture = 1 */
 227         snd_pcm_substream_t *substream;
 228         int running;
 229         unsigned int tbl_entries; /* # descriptors */
 230         struct snd_dma_buffer table;
 231         struct snd_via_sg_table *idx_table;
 232         /* for recovery from the unexpected pointer */
 233         unsigned int lastpos;
 234         unsigned int bufsize;
 235         unsigned int bufsize2;
 236 };
 237
 238 enum { TYPE_CARD_VIA82XX_MODEM = 1 };
 239
 240 #define VIA_MAX_MODEM_DEVS      2
 241
 242 struct _snd_via82xx_modem {
 243         int irq;
 244
 245         unsigned long port;
 246
 247         unsigned int intr_mask; /* SGD_SHADOW mask to check interrupts */
 248
 249         struct pci_dev *pci;
 250         snd_card_t *card;
 251
 252         unsigned int num_devs;
 253         unsigned int playback_devno, capture_devno;
 254         viadev_t devs[VIA_MAX_MODEM_DEVS];
 255
 256         snd_pcm_t *pcms[2];
 257
 258         ac97_bus_t *ac97_bus;
 259         ac97_t *ac97;
 260         unsigned int ac97_clock;
 261         unsigned int ac97_secondary;    /* secondary AC'97 codec is present */
 262
 263         spinlock_t reg_lock;
 264         snd_info_entry_t *proc_entry;
 265 };
 266
 267 static struct pci_device_id snd_via82xx_modem_ids[] = {
 268         { 0x1106, 0x3068, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPE_CARD_VIA82XX_MODEM, },
 269         { 0, }
 270 };
 271
 272 MODULE_DEVICE_TABLE(pci, snd_via82xx_modem_ids);
 273
 274 /*
 275  */
 276
 277 /*
 278  * allocate and initialize the descriptor buffers
 279  * periods = number of periods
 280  * fragsize = period size in bytes
 281  */
 282 static int build_via_table(viadev_t *dev, snd_pcm_substream_t *substream,
 283                            struct pci_dev *pci,
 284                            unsigned int periods, unsigned int fragsize)
 285 {
 286         unsigned int i, idx, ofs, rest;
 287         via82xx_t *chip = snd_pcm_substream_chip(substream);
 288         struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
 289
 290         if (dev->table.area == NULL) {
 291                 /* the start of each lists must be aligned to 8 bytes,
 292                  * but the kernel pages are much bigger, so we don't care
 293                  */
 294                 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
 295                                         PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8),
 296                                         &dev->table) < 0)
 297                         return -ENOMEM;
 298         }
 299         if (! dev->idx_table) {
 300                 dev->idx_table = kmalloc(sizeof(*dev->idx_table) * VIA_TABLE_SIZE, GFP_KERNEL);
 301                 if (! dev->idx_table)
 302                         return -ENOMEM;
 303         }
 304
 305         /* fill the entries */
 306         idx = 0;
 307         ofs = 0;
 308         for (i = 0; i < periods; i++) {
 309                 rest = fragsize;
 310                 /* fill descriptors for a period.
 311                  * a period can be split to several descriptors if it's
 312                  * over page boundary.
 313                  */
 314                 do {
 315                         unsigned int r;
 316                         unsigned int flag;
 317
 318                         if (idx >= VIA_TABLE_SIZE) {
 319                                 snd_printk(KERN_ERR "via82xx: too much table size!\n");
 320                                 return -EINVAL;
 321                         }
 322                         ((u32 *)dev->table.area)[idx << 1] = cpu_to_le32((u32)snd_pcm_sgbuf_get_addr(sgbuf, ofs));
 323                         r = PAGE_SIZE - (ofs % PAGE_SIZE);
 324                         if (rest < r)
 325                                 r = rest;
 326                         rest -= r;
 327                         if (! rest) {
 328                                 if (i == periods - 1)
 329                                         flag = VIA_TBL_BIT_EOL; /* buffer boundary */
 330                                 else
 331                                         flag = VIA_TBL_BIT_FLAG; /* period boundary */
 332                         } else
 333                                 flag = 0; /* period continues to the next */
 334                         // printk("via: tbl %d: at %d  size %d (rest %d)\n", idx, ofs, r, rest);
 335                         ((u32 *)dev->table.area)[(idx<<1) + 1] = cpu_to_le32(r | flag);
 336                         dev->idx_table[idx].offset = ofs;
 337                         dev->idx_table[idx].size = r;
 338                         ofs += r;
 339                         idx++;
 340                 } while (rest > 0);
 341         }
 342         dev->tbl_entries = idx;
 343         dev->bufsize = periods * fragsize;
 344         dev->bufsize2 = dev->bufsize / 2;
 345         return 0;
 346 }
 347
 348
 349 static int clean_via_table(viadev_t *dev, snd_pcm_substream_t *substream,
 350                            struct pci_dev *pci)
 351 {
 352         if (dev->table.area) {
 353                 snd_dma_free_pages(&dev->table);
 354                 dev->table.area = NULL;
 355         }
 356         kfree(dev->idx_table);
 357         dev->idx_table = NULL;
 358         return 0;
 359 }
 360
 361 /*
 362  *  Basic I/O
 363  */
 364
 365 static inline unsigned int snd_via82xx_codec_xread(via82xx_t *chip)
 366 {
 367         return inl(VIAREG(chip, AC97));
 368 }
 369
 370 static inline void snd_via82xx_codec_xwrite(via82xx_t *chip, unsigned int val)
 371 {
 372         outl(val, VIAREG(chip, AC97));
 373 }
 374
 375 static int snd_via82xx_codec_ready(via82xx_t *chip, int secondary)
 376 {
 377         unsigned int timeout = 1000;    /* 1ms */
 378         unsigned int val;
 379
 380         while (timeout-- > 0) {
 381                 udelay(1);
 382                 if (!((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY))
 383                         return val & 0xffff;
 384         }
 385         snd_printk(KERN_ERR "codec_ready: codec %i is not ready [0x%x]\n", secondary, snd_via82xx_codec_xread(chip));
 386         return -EIO;
 387 }
 388
 389 static int snd_via82xx_codec_valid(via82xx_t *chip, int secondary)
 390 {
 391         unsigned int timeout = 1000;    /* 1ms */
 392         unsigned int val, val1;
 393         unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
 394                                          VIA_REG_AC97_SECONDARY_VALID;
 395
 396         while (timeout-- > 0) {
 397                 val = snd_via82xx_codec_xread(chip);
 398                 val1 = val & (VIA_REG_AC97_BUSY | stat);
 399                 if (val1 == stat)
 400                         return val & 0xffff;
 401                 udelay(1);
 402         }
 403         return -EIO;
 404 }
 405
 406 static void snd_via82xx_codec_wait(ac97_t *ac97)
 407 {
 408         via82xx_t *chip = ac97->private_data;
 409         int err;
 410         err = snd_via82xx_codec_ready(chip, ac97->num);
 411         /* here we need to wait fairly for long time.. */
 412         msleep(500);
 413 }
 414
 415 static void snd_via82xx_codec_write(ac97_t *ac97,
 416                                     unsigned short reg,
 417                                     unsigned short val)
 418 {
 419         via82xx_t *chip = ac97->private_data;
 420         unsigned int xval;
 421         if(reg == AC97_GPIO_STATUS) {
 422                 outl(val, VIAREG(chip, GPI_STATUS));
 423                 return;
 424         }
 425         xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
 426         xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
 427         xval |= reg << VIA_REG_AC97_CMD_SHIFT;
 428         xval |= val << VIA_REG_AC97_DATA_SHIFT;
 429         snd_via82xx_codec_xwrite(chip, xval);
 430         snd_via82xx_codec_ready(chip, ac97->num);
 431 }
 432
 433 static unsigned short snd_via82xx_codec_read(ac97_t *ac97, unsigned short reg)
 434 {
 435         via82xx_t *chip = ac97->private_data;
 436         unsigned int xval, val = 0xffff;
 437         int again = 0;
 438
 439         xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
 440         xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
 441         xval |= VIA_REG_AC97_READ;
 442         xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
 443         while (1) {
 444                 if (again++ > 3) {
 445                         snd_printk(KERN_ERR "codec_read: codec %i is not valid [0x%x]\n", ac97->num, snd_via82xx_codec_xread(chip));
 446                         return 0xffff;
 447                 }
 448                 snd_via82xx_codec_xwrite(chip, xval);
 449                 udelay (20);
 450                 if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) {
 451                         udelay(25);
 452                         val = snd_via82xx_codec_xread(chip);
 453                         break;
 454                 }
 455         }
 456         return val & 0xffff;
 457 }
 458
 459 static void snd_via82xx_channel_reset(via82xx_t *chip, viadev_t *viadev)
 460 {
 461         outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET,
 462              VIADEV_REG(viadev, OFFSET_CONTROL));
 463         inb(VIADEV_REG(viadev, OFFSET_CONTROL));
 464         udelay(50);
 465         /* disable interrupts */
 466         outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL));
 467         /* clear interrupts */
 468         outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS));
 469         outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */
 470         // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
 471         viadev->lastpos = 0;
 472 }
 473
 474
 475 /*
 476  *  Interrupt handler
 477  */
 478
 479 static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 480 {
 481         via82xx_t *chip = dev_id;
 482         unsigned int status;
 483         unsigned int i;
 484
 485         status = inl(VIAREG(chip, SGD_SHADOW));
 486         if (! (status & chip->intr_mask)) {
 487                 return IRQ_NONE;
 488         }
 489 // _skip_sgd:
 490
 491         /* check status for each stream */
 492         spin_lock(&chip->reg_lock);
 493         for (i = 0; i < chip->num_devs; i++) {
 494                 viadev_t *viadev = &chip->devs[i];
 495                 unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
 496                 c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED);
 497                 if (! c_status)
 498                         continue;
 499                 if (viadev->substream && viadev->running) {
 500                         spin_unlock(&chip->reg_lock);
 501                         snd_pcm_period_elapsed(viadev->substream);
 502                         spin_lock(&chip->reg_lock);
 503                 }
 504                 outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
 505         }
 506         spin_unlock(&chip->reg_lock);
 507         return IRQ_HANDLED;
 508 }
 509
 510 /*
 511  *  PCM callbacks
 512  */
 513
 514 /*
 515  * trigger callback
 516  */
 517 static int snd_via82xx_pcm_trigger(snd_pcm_substream_t * substream, int cmd)
 518 {
 519         via82xx_t *chip = snd_pcm_substream_chip(substream);
 520         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 521         unsigned char val = 0;
 522
 523         switch (cmd) {
 524         case SNDRV_PCM_TRIGGER_START:
 525         case SNDRV_PCM_TRIGGER_SUSPEND:
 526                 val |= VIA_REG_CTRL_START;
 527                 viadev->running = 1;
 528                 break;
 529         case SNDRV_PCM_TRIGGER_STOP:
 530                 val = VIA_REG_CTRL_TERMINATE;
 531                 viadev->running = 0;
 532                 break;
 533         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 534                 val |= VIA_REG_CTRL_PAUSE;
 535                 viadev->running = 0;
 536                 break;
 537         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 538                 viadev->running = 1;
 539                 break;
 540         default:
 541                 return -EINVAL;
 542         }
 543         outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
 544         if (cmd == SNDRV_PCM_TRIGGER_STOP)
 545                 snd_via82xx_channel_reset(chip, viadev);
 546         return 0;
 547 }
 548
 549 /*
 550  * pointer callbacks
 551  */
 552
 553 /*
 554  * calculate the linear position at the given sg-buffer index and the rest count
 555  */
 556
 557 #define check_invalid_pos(viadev,pos) \
 558         ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 || viadev->lastpos < viadev->bufsize2))
 559
 560 static inline unsigned int calc_linear_pos(viadev_t *viadev, unsigned int idx, unsigned int count)
 561 {
 562         unsigned int size, res;
 563
 564         size = viadev->idx_table[idx].size;
 565         res = viadev->idx_table[idx].offset + size - count;
 566
 567         /* check the validity of the calculated position */
 568         if (size < count) {
 569                 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (size = %d, count = %d)\n", (int)size, (int)count);
 570                 res = viadev->lastpos;
 571         } else if (check_invalid_pos(viadev, res)) {
 572 #ifdef POINTER_DEBUG
 573                 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);
 574 #endif
 575                 if (count && size < count) {
 576                         snd_printd(KERN_ERR "invalid via82xx_cur_ptr, using last valid pointer\n");
 577                         res = viadev->lastpos;
 578                 } else {
 579                         if (! count)
 580                                 /* bogus count 0 on the DMA boundary? */
 581                                 res = viadev->idx_table[idx].offset;
 582                         else
 583                                 /* count register returns full size when end of buffer is reached */
 584                                 res = viadev->idx_table[idx].offset + size;
 585                         if (check_invalid_pos(viadev, res)) {
 586                                 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (2), using last valid pointer\n");
 587                                 res = viadev->lastpos;
 588                         }
 589                 }
 590         }
 591         viadev->lastpos = res; /* remember the last position */
 592         if (res >= viadev->bufsize)
 593                 res -= viadev->bufsize;
 594         return res;
 595 }
 596
 597 /*
 598  * get the current pointer on via686
 599  */
 600 static snd_pcm_uframes_t snd_via686_pcm_pointer(snd_pcm_substream_t *substream)
 601 {
 602         via82xx_t *chip = snd_pcm_substream_chip(substream);
 603         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 604         unsigned int idx, ptr, count, res;
 605
 606         snd_assert(viadev->tbl_entries, return 0);
 607         if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
 608                 return 0;
 609
 610         spin_lock(&chip->reg_lock);
 611         count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
 612         /* The via686a does not have the current index register,
 613          * so we need to calculate the index from CURR_PTR.
 614          */
 615         ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
 616         if (ptr <= (unsigned int)viadev->table.addr)
 617                 idx = 0;
 618         else /* CURR_PTR holds the address + 8 */
 619                 idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) % viadev->tbl_entries;
 620         res = calc_linear_pos(viadev, idx, count);
 621         spin_unlock(&chip->reg_lock);
 622
 623         return bytes_to_frames(substream->runtime, res);
 624 }
 625
 626 /*
 627  * hw_params callback:
 628  * allocate the buffer and build up the buffer description table
 629  */
 630 static int snd_via82xx_hw_params(snd_pcm_substream_t * substream,
 631                                  snd_pcm_hw_params_t * hw_params)
 632 {
 633         via82xx_t *chip = snd_pcm_substream_chip(substream);
 634         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 635         int err;
 636
 637         err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 638         if (err < 0)
 639                 return err;
 640         err = build_via_table(viadev, substream, chip->pci,
 641                               params_periods(hw_params),
 642                               params_period_bytes(hw_params));
 643         if (err < 0)
 644                 return err;
 645
 646         snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params));
 647         snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0);
 648
 649         return 0;
 650 }
 651
 652 /*
 653  * hw_free callback:
 654  * clean up the buffer description table and release the buffer
 655  */
 656 static int snd_via82xx_hw_free(snd_pcm_substream_t * substream)
 657 {
 658         via82xx_t *chip = snd_pcm_substream_chip(substream);
 659         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 660
 661         clean_via_table(viadev, substream, chip->pci);
 662         snd_pcm_lib_free_pages(substream);
 663         return 0;
 664 }
 665
 666
 667 /*
 668  * set up the table pointer
 669  */
 670 static void snd_via82xx_set_table_ptr(via82xx_t *chip, viadev_t *viadev)
 671 {
 672         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 673         outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
 674         udelay(20);
 675         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 676 }
 677
 678 /*
 679  * prepare callback for playback and capture
 680  */
 681 static int snd_via82xx_pcm_prepare(snd_pcm_substream_t *substream)
 682 {
 683         via82xx_t *chip = snd_pcm_substream_chip(substream);
 684         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 685
 686         snd_via82xx_channel_reset(chip, viadev);
 687         /* this must be set after channel_reset */
 688         snd_via82xx_set_table_ptr(chip, viadev);
 689         outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG,
 690              VIADEV_REG(viadev, OFFSET_TYPE));
 691         return 0;
 692 }
 693
 694 /*
 695  * pcm hardware definition, identical for both playback and capture
 696  */
 697 static snd_pcm_hardware_t snd_via82xx_hw =
 698 {
 699         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 700                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 701                                  SNDRV_PCM_INFO_MMAP_VALID |
 702                                  /* SNDRV_PCM_INFO_RESUME | */
 703                                  SNDRV_PCM_INFO_PAUSE),
 704         .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
 705         .rates =                SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
 706         .rate_min =             8000,
 707         .rate_max =             16000,
 708         .channels_min =         1,
 709         .channels_max =         1,
 710         .buffer_bytes_max =     128 * 1024,
 711         .period_bytes_min =     32,
 712         .period_bytes_max =     128 * 1024,
 713         .periods_min =          2,
 714         .periods_max =          VIA_TABLE_SIZE / 2,
 715         .fifo_size =            0,
 716 };
 717
 718
 719 /*
 720  * open callback skeleton
 721  */
 722 static int snd_via82xx_modem_pcm_open(via82xx_t *chip, viadev_t *viadev, snd_pcm_substream_t * substream)
 723 {
 724         snd_pcm_runtime_t *runtime = substream->runtime;
 725         int err;
 726         static unsigned int rates[] = { 8000,  9600, 12000, 16000 };
 727         static snd_pcm_hw_constraint_list_t hw_constraints_rates = {
 728                 .count = ARRAY_SIZE(rates),
 729                 .list = rates,
 730                 .mask = 0,
 731         };
 732
 733         runtime->hw = snd_via82xx_hw;
 734
 735         if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates)) < 0)
 736                 return err;
 737
 738         /* we may remove following constaint when we modify table entries
 739            in interrupt */
 740         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 741                 return err;
 742
 743         runtime->private_data = viadev;
 744         viadev->substream = substream;
 745
 746         return 0;
 747 }
 748
 749
 750 /*
 751  * open callback for playback
 752  */
 753 static int snd_via82xx_playback_open(snd_pcm_substream_t * substream)
 754 {
 755         via82xx_t *chip = snd_pcm_substream_chip(substream);
 756         viadev_t *viadev = &chip->devs[chip->playback_devno + substream->number];
 757
 758         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 759 }
 760
 761 /*
 762  * open callback for capture
 763  */
 764 static int snd_via82xx_capture_open(snd_pcm_substream_t * substream)
 765 {
 766         via82xx_t *chip = snd_pcm_substream_chip(substream);
 767         viadev_t *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
 768
 769         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 770 }
 771
 772 /*
 773  * close callback
 774  */
 775 static int snd_via82xx_pcm_close(snd_pcm_substream_t * substream)
 776 {
 777         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 778
 779         viadev->substream = NULL;
 780         return 0;
 781 }
 782
 783
 784 /* via686 playback callbacks */
 785 static snd_pcm_ops_t snd_via686_playback_ops = {
 786         .open =         snd_via82xx_playback_open,
 787         .close =        snd_via82xx_pcm_close,
 788         .ioctl =        snd_pcm_lib_ioctl,
 789         .hw_params =    snd_via82xx_hw_params,
 790         .hw_free =      snd_via82xx_hw_free,
 791         .prepare =      snd_via82xx_pcm_prepare,
 792         .trigger =      snd_via82xx_pcm_trigger,
 793         .pointer =      snd_via686_pcm_pointer,
 794         .page =         snd_pcm_sgbuf_ops_page,
 795 };
 796
 797 /* via686 capture callbacks */
 798 static snd_pcm_ops_t snd_via686_capture_ops = {
 799         .open =         snd_via82xx_capture_open,
 800         .close =        snd_via82xx_pcm_close,
 801         .ioctl =        snd_pcm_lib_ioctl,
 802         .hw_params =    snd_via82xx_hw_params,
 803         .hw_free =      snd_via82xx_hw_free,
 804         .prepare =      snd_via82xx_pcm_prepare,
 805         .trigger =      snd_via82xx_pcm_trigger,
 806         .pointer =      snd_via686_pcm_pointer,
 807         .page =         snd_pcm_sgbuf_ops_page,
 808 };
 809
 810
 811 static void init_viadev(via82xx_t *chip, int idx, unsigned int reg_offset, int direction)
 812 {
 813         chip->devs[idx].reg_offset = reg_offset;
 814         chip->devs[idx].direction = direction;
 815         chip->devs[idx].port = chip->port + reg_offset;
 816 }
 817
 818 /*
 819  * create a pcm instance for via686a/b
 820  */
 821 static int __devinit snd_via686_pcm_new(via82xx_t *chip)
 822 {
 823         snd_pcm_t *pcm;
 824         int err;
 825
 826         chip->playback_devno = 0;
 827         chip->capture_devno = 1;
 828         chip->num_devs = 2;
 829         chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */
 830
 831         err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
 832         if (err < 0)
 833                 return err;
 834         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
 835         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
 836         pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
 837         pcm->private_data = chip;
 838         strcpy(pcm->name, chip->card->shortname);
 839         chip->pcms[0] = pcm;
 840         init_viadev(chip, 0, VIA_REG_MO_STATUS, 0);
 841         init_viadev(chip, 1, VIA_REG_MI_STATUS, 1);
 842
 843         if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
 844                                                          snd_dma_pci_data(chip->pci), 64*1024, 128*1024)) < 0)
 845                 return err;
 846
 847         return 0;
 848 }
 849
 850
 851 /*
 852  *  Mixer part
 853  */
 854
 855
 856 static void snd_via82xx_mixer_free_ac97_bus(ac97_bus_t *bus)
 857 {
 858         via82xx_t *chip = bus->private_data;
 859         chip->ac97_bus = NULL;
 860 }
 861
 862 static void snd_via82xx_mixer_free_ac97(ac97_t *ac97)
 863 {
 864         via82xx_t *chip = ac97->private_data;
 865         chip->ac97 = NULL;
 866 }
 867
 868
 869 static int __devinit snd_via82xx_mixer_new(via82xx_t *chip)
 870 {
 871         ac97_template_t ac97;
 872         int err;
 873         static ac97_bus_ops_t ops = {
 874                 .write = snd_via82xx_codec_write,
 875                 .read = snd_via82xx_codec_read,
 876                 .wait = snd_via82xx_codec_wait,
 877         };
 878
 879         if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
 880                 return err;
 881         chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
 882         chip->ac97_bus->clock = chip->ac97_clock;
 883
 884         memset(&ac97, 0, sizeof(ac97));
 885         ac97.private_data = chip;
 886         ac97.private_free = snd_via82xx_mixer_free_ac97;
 887         ac97.pci = chip->pci;
 888         ac97.scaps = AC97_SCAP_SKIP_AUDIO;
 889         ac97.num = chip->ac97_secondary;
 890
 891         if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
 892                 return err;
 893
 894         return 0;
 895 }
 896
 897
 898 /*
 899  * proc interface
 900  */
 901 static void snd_via82xx_proc_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
 902 {
 903         via82xx_t *chip = entry->private_data;
 904         int i;
 905
 906         snd_iprintf(buffer, "%s\n\n", chip->card->longname);
 907         for (i = 0; i < 0xa0; i += 4) {
 908                 snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
 909         }
 910 }
 911
 912 static void __devinit snd_via82xx_proc_init(via82xx_t *chip)
 913 {
 914         snd_info_entry_t *entry;
 915
 916         if (! snd_card_proc_new(chip->card, "via82xx", &entry))
 917                 snd_info_set_text_ops(entry, chip, 1024, snd_via82xx_proc_read);
 918 }
 919
 920 /*
 921  *
 922  */
 923
 924 static int snd_via82xx_chip_init(via82xx_t *chip)
 925 {
 926         unsigned int val;
 927         unsigned long end_time;
 928         unsigned char pval;
 929
 930         pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval);
 931         if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) {
 932                 pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT);
 933                 udelay(100);
 934         }
 935
 936         pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 937         if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
 938                 /* deassert ACLink reset, force SYNC */
 939                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 940                                       VIA_ACLINK_CTRL_ENABLE |
 941                                       VIA_ACLINK_CTRL_RESET |
 942                                       VIA_ACLINK_CTRL_SYNC);
 943                 udelay(100);
 944 #if 1 /* FIXME: should we do full reset here for all chip models? */
 945                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
 946                 udelay(100);
 947 #else
 948                 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
 949                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 950                                       VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
 951                 udelay(2);
 952 #endif
 953                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 954                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 955                 udelay(100);
 956         }
 957
 958         pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
 959         if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
 960                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 961                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 962                 udelay(100);
 963         }
 964
 965         /* wait until codec ready */
 966         end_time = jiffies + msecs_to_jiffies(750);
 967         do {
 968                 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 969                 if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
 970                         break;
 971                 schedule_timeout_uninterruptible(1);
 972         } while (time_before(jiffies, end_time));
 973
 974         if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)
 975                 snd_printk(KERN_ERR "AC'97 codec is not ready [0x%x]\n", val);
 976
 977         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
 978                                  VIA_REG_AC97_SECONDARY_VALID |
 979                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
 980         end_time = jiffies + msecs_to_jiffies(750);
 981         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
 982                                  VIA_REG_AC97_SECONDARY_VALID |
 983                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
 984         do {
 985                 if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) {
 986                         chip->ac97_secondary = 1;
 987                         goto __ac97_ok2;
 988                 }
 989                 schedule_timeout_interruptible(1);
 990         } while (time_before(jiffies, end_time));
 991         /* This is ok, the most of motherboards have only one codec */
 992
 993       __ac97_ok2:
 994
 995         /* route FM trap to IRQ, disable FM trap */
 996         // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
 997         /* disable all GPI interrupts */
 998         outl(0, VIAREG(chip, GPI_INTR));
 999
1000         return 0;
1001 }
1002
1003 #ifdef CONFIG_PM
1004 /*
1005  * power management
1006  */
1007 static int snd_via82xx_suspend(snd_card_t *card, pm_message_t state)
1008 {
1009         via82xx_t *chip = card->pm_private_data;
1010         int i;
1011
1012         for (i = 0; i < 2; i++)
1013                 if (chip->pcms[i])
1014                         snd_pcm_suspend_all(chip->pcms[i]);
1015         for (i = 0; i < chip->num_devs; i++)
1016                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1017         synchronize_irq(chip->irq);
1018         snd_ac97_suspend(chip->ac97);
1019         pci_set_power_state(chip->pci, 3);
1020         pci_disable_device(chip->pci);
1021         return 0;
1022 }
1023
1024 static int snd_via82xx_resume(snd_card_t *card)
1025 {
1026         via82xx_t *chip = card->pm_private_data;
1027         int i;
1028
1029         pci_enable_device(chip->pci);
1030         pci_set_power_state(chip->pci, 0);
1031         pci_set_master(chip->pci);
1032
1033         snd_via82xx_chip_init(chip);
1034
1035         snd_ac97_resume(chip->ac97);
1036
1037         for (i = 0; i < chip->num_devs; i++)
1038                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1039
1040         return 0;
1041 }
1042 #endif /* CONFIG_PM */
1043
1044 static int snd_via82xx_free(via82xx_t *chip)
1045 {
1046         unsigned int i;
1047
1048         if (chip->irq < 0)
1049                 goto __end_hw;
1050         /* disable interrupts */
1051         for (i = 0; i < chip->num_devs; i++)
1052                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1053         synchronize_irq(chip->irq);
1054       __end_hw:
1055         if (chip->irq >= 0)
1056                 free_irq(chip->irq, (void *)chip);
1057         pci_release_regions(chip->pci);
1058         pci_disable_device(chip->pci);
1059         kfree(chip);
1060         return 0;
1061 }
1062
1063 static int snd_via82xx_dev_free(snd_device_t *device)
1064 {
1065         via82xx_t *chip = device->device_data;
1066         return snd_via82xx_free(chip);
1067 }
1068
1069 static int __devinit snd_via82xx_create(snd_card_t * card,
1070                                         struct pci_dev *pci,
1071                                         int chip_type,
1072                                         int revision,
1073                                         unsigned int ac97_clock,
1074                                         via82xx_t ** r_via)
1075 {
1076         via82xx_t *chip;
1077         int err;
1078         static snd_device_ops_t ops = {
1079                 .dev_free =     snd_via82xx_dev_free,
1080         };
1081
1082         if ((err = pci_enable_device(pci)) < 0)
1083                 return err;
1084
1085         if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) {
1086                 pci_disable_device(pci);
1087                 return -ENOMEM;
1088         }
1089
1090         spin_lock_init(&chip->reg_lock);
1091         chip->card = card;
1092         chip->pci = pci;
1093         chip->irq = -1;
1094
1095         if ((err = pci_request_regions(pci, card->driver)) < 0) {
1096                 kfree(chip);
1097                 pci_disable_device(pci);
1098                 return err;
1099         }
1100         chip->port = pci_resource_start(pci, 0);
1101         if (request_irq(pci->irq, snd_via82xx_interrupt, SA_INTERRUPT|SA_SHIRQ,
1102                         card->driver, (void *)chip)) {
1103                 snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
1104                 snd_via82xx_free(chip);
1105                 return -EBUSY;
1106         }
1107         chip->irq = pci->irq;
1108         if (ac97_clock >= 8000 && ac97_clock <= 48000)
1109                 chip->ac97_clock = ac97_clock;
1110         synchronize_irq(chip->irq);
1111
1112         if ((err = snd_via82xx_chip_init(chip)) < 0) {
1113                 snd_via82xx_free(chip);
1114                 return err;
1115         }
1116
1117         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1118                 snd_via82xx_free(chip);
1119                 return err;
1120         }
1121
1122         /* The 8233 ac97 controller does not implement the master bit
1123          * in the pci command register. IMHO this is a violation of the PCI spec.
1124          * We call pci_set_master here because it does not hurt. */
1125         pci_set_master(pci);
1126
1127         snd_card_set_dev(card, &pci->dev);
1128
1129         *r_via = chip;
1130         return 0;
1131 }
1132
1133
1134 static int __devinit snd_via82xx_probe(struct pci_dev *pci,
1135                                        const struct pci_device_id *pci_id)
1136 {
1137         snd_card_t *card;
1138         via82xx_t *chip;
1139         unsigned char revision;
1140         int chip_type = 0, card_type;
1141         unsigned int i;
1142         int err;
1143
1144         card = snd_card_new(index, id, THIS_MODULE, 0);
1145         if (card == NULL)
1146                 return -ENOMEM;
1147
1148         card_type = pci_id->driver_data;
1149         pci_read_config_byte(pci, PCI_REVISION_ID, &revision);
1150         switch (card_type) {
1151         case TYPE_CARD_VIA82XX_MODEM:
1152                 strcpy(card->driver, "VIA82XX-MODEM");
1153                 sprintf(card->shortname, "VIA 82XX modem");
1154                 break;
1155         default:
1156                 snd_printk(KERN_ERR "invalid card type %d\n", card_type);
1157                 err = -EINVAL;
1158                 goto __error;
1159         }
1160
1161         if ((err = snd_via82xx_create(card, pci, chip_type, revision,
1162                                       ac97_clock, &chip)) < 0)
1163                 goto __error;
1164         if ((err = snd_via82xx_mixer_new(chip)) < 0)
1165                 goto __error;
1166
1167         if ((err = snd_via686_pcm_new(chip)) < 0 )
1168                 goto __error;
1169
1170         snd_card_set_pm_callback(card, snd_via82xx_suspend, snd_via82xx_resume, chip);
1171
1172         /* disable interrupts */
1173         for (i = 0; i < chip->num_devs; i++)
1174                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1175
1176         sprintf(card->longname, "%s at 0x%lx, irq %d",
1177                 card->shortname, chip->port, chip->irq);
1178
1179         snd_via82xx_proc_init(chip);
1180
1181         if ((err = snd_card_register(card)) < 0) {
1182                 snd_card_free(card);
1183                 return err;
1184         }
1185         pci_set_drvdata(pci, card);
1186         return 0;
1187
1188  __error:
1189         snd_card_free(card);
1190         return err;
1191 }
1192
1193 static void __devexit snd_via82xx_remove(struct pci_dev *pci)
1194 {
1195         snd_card_free(pci_get_drvdata(pci));
1196         pci_set_drvdata(pci, NULL);
1197 }
1198
1199 static struct pci_driver driver = {
1200         .name = "VIA 82xx Modem",
1201         .id_table = snd_via82xx_modem_ids,
1202         .probe = snd_via82xx_probe,
1203         .remove = __devexit_p(snd_via82xx_remove),
1204         SND_PCI_PM_CALLBACKS
1205 };
1206
1207 static int __init alsa_card_via82xx_init(void)
1208 {
1209         return pci_register_driver(&driver);
1210 }
1211
1212 static void __exit alsa_card_via82xx_exit(void)
1213 {
1214         pci_unregister_driver(&driver);
1215 }
1216
1217 module_init(alsa_card_via82xx_init)
1218 module_exit(alsa_card_via82xx_exit)