sound/pci/via82xx_modem.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   ALSA modem driver for VIA VT82xx (South Bridge)
   4  *
   5  *   VT82C686A/B/C, VT8233A/C, VT8235
   6  *
   7  *      Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz>
   8  *                         Tjeerd.Mulder <Tjeerd.Mulder@fujitsu-siemens.com>
   9  *                    2002 Takashi Iwai <tiwai@suse.de>
  10  */
  11
  12 /*
  13  * Changes:
  14  *
  15  * Sep. 2,  2004  Sasha Khapyorsky <sashak@alsa-project.org>
  16  *      Modified from original audio driver 'via82xx.c' to support AC97
  17  *      modems.
  18  */
  19
  20 #include <linux/io.h>
  21 #include <linux/delay.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/init.h>
  24 #include <linux/pci.h>
  25 #include <linux/slab.h>
  26 #include <linux/module.h>
  27 #include <sound/core.h>
  28 #include <sound/pcm.h>
  29 #include <sound/pcm_params.h>
  30 #include <sound/info.h>
  31 #include <sound/ac97_codec.h>
  32 #include <sound/initval.h>
  33
  34 #if 0
  35 #define POINTER_DEBUG
  36 #endif
  37
  38 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  39 MODULE_DESCRIPTION("VIA VT82xx modem");
  40 MODULE_LICENSE("GPL");
  41
  42 static int index = -2; /* Exclude the first card */
  43 static char *id = SNDRV_DEFAULT_STR1;   /* ID for this card */
  44 static int ac97_clock = 48000;
  45
  46 module_param(index, int, 0444);
  47 MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge.");
  48 module_param(id, charp, 0444);
  49 MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge.");
  50 module_param(ac97_clock, int, 0444);
  51 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
  52
  53 /* just for backward compatibility */
  54 static bool enable;
  55 module_param(enable, bool, 0444);
  56
  57
  58 /*
  59  *  Direct registers
  60  */
  61
  62 #define VIAREG(via, x) ((via)->port + VIA_REG_##x)
  63 #define VIADEV_REG(viadev, x) ((viadev)->port + VIA_REG_##x)
  64
  65 /* common offsets */
  66 #define VIA_REG_OFFSET_STATUS           0x00    /* byte - channel status */
  67 #define   VIA_REG_STAT_ACTIVE           0x80    /* RO */
  68 #define   VIA_REG_STAT_PAUSED           0x40    /* RO */
  69 #define   VIA_REG_STAT_TRIGGER_QUEUED   0x08    /* RO */
  70 #define   VIA_REG_STAT_STOPPED          0x04    /* RWC */
  71 #define   VIA_REG_STAT_EOL              0x02    /* RWC */
  72 #define   VIA_REG_STAT_FLAG             0x01    /* RWC */
  73 #define VIA_REG_OFFSET_CONTROL          0x01    /* byte - channel control */
  74 #define   VIA_REG_CTRL_START            0x80    /* WO */
  75 #define   VIA_REG_CTRL_TERMINATE        0x40    /* WO */
  76 #define   VIA_REG_CTRL_AUTOSTART        0x20
  77 #define   VIA_REG_CTRL_PAUSE            0x08    /* RW */
  78 #define   VIA_REG_CTRL_INT_STOP         0x04
  79 #define   VIA_REG_CTRL_INT_EOL          0x02
  80 #define   VIA_REG_CTRL_INT_FLAG         0x01
  81 #define   VIA_REG_CTRL_RESET            0x01    /* RW - probably reset? undocumented */
  82 #define   VIA_REG_CTRL_INT (VIA_REG_CTRL_INT_FLAG | VIA_REG_CTRL_INT_EOL | VIA_REG_CTRL_AUTOSTART)
  83 #define VIA_REG_OFFSET_TYPE             0x02    /* byte - channel type (686 only) */
  84 #define   VIA_REG_TYPE_AUTOSTART        0x80    /* RW - autostart at EOL */
  85 #define   VIA_REG_TYPE_16BIT            0x20    /* RW */
  86 #define   VIA_REG_TYPE_STEREO           0x10    /* RW */
  87 #define   VIA_REG_TYPE_INT_LLINE        0x00
  88 #define   VIA_REG_TYPE_INT_LSAMPLE      0x04
  89 #define   VIA_REG_TYPE_INT_LESSONE      0x08
  90 #define   VIA_REG_TYPE_INT_MASK         0x0c
  91 #define   VIA_REG_TYPE_INT_EOL          0x02
  92 #define   VIA_REG_TYPE_INT_FLAG         0x01
  93 #define VIA_REG_OFFSET_TABLE_PTR        0x04    /* dword - channel table pointer */
  94 #define VIA_REG_OFFSET_CURR_PTR         0x04    /* dword - channel current pointer */
  95 #define VIA_REG_OFFSET_STOP_IDX         0x08    /* dword - stop index, channel type, sample rate */
  96 #define VIA_REG_OFFSET_CURR_COUNT       0x0c    /* dword - channel current count (24 bit) */
  97 #define VIA_REG_OFFSET_CURR_INDEX       0x0f    /* byte - channel current index (for via8233 only) */
  98
  99 #define DEFINE_VIA_REGSET(name,val) \
 100 enum {\
 101         VIA_REG_##name##_STATUS         = (val),\
 102         VIA_REG_##name##_CONTROL        = (val) + 0x01,\
 103         VIA_REG_##name##_TYPE           = (val) + 0x02,\
 104         VIA_REG_##name##_TABLE_PTR      = (val) + 0x04,\
 105         VIA_REG_##name##_CURR_PTR       = (val) + 0x04,\
 106         VIA_REG_##name##_STOP_IDX       = (val) + 0x08,\
 107         VIA_REG_##name##_CURR_COUNT     = (val) + 0x0c,\
 108 }
 109
 110 /* modem block */
 111 DEFINE_VIA_REGSET(MO, 0x40);
 112 DEFINE_VIA_REGSET(MI, 0x50);
 113
 114 /* AC'97 */
 115 #define VIA_REG_AC97                    0x80    /* dword */
 116 #define   VIA_REG_AC97_CODEC_ID_MASK    (3<<30)
 117 #define   VIA_REG_AC97_CODEC_ID_SHIFT   30
 118 #define   VIA_REG_AC97_CODEC_ID_PRIMARY 0x00
 119 #define   VIA_REG_AC97_CODEC_ID_SECONDARY 0x01
 120 #define   VIA_REG_AC97_SECONDARY_VALID  (1<<27)
 121 #define   VIA_REG_AC97_PRIMARY_VALID    (1<<25)
 122 #define   VIA_REG_AC97_BUSY             (1<<24)
 123 #define   VIA_REG_AC97_READ             (1<<23)
 124 #define   VIA_REG_AC97_CMD_SHIFT        16
 125 #define   VIA_REG_AC97_CMD_MASK         0x7e
 126 #define   VIA_REG_AC97_DATA_SHIFT       0
 127 #define   VIA_REG_AC97_DATA_MASK        0xffff
 128
 129 #define VIA_REG_SGD_SHADOW              0x84    /* dword */
 130 #define   VIA_REG_SGD_STAT_PB_FLAG      (1<<0)
 131 #define   VIA_REG_SGD_STAT_CP_FLAG      (1<<1)
 132 #define   VIA_REG_SGD_STAT_FM_FLAG      (1<<2)
 133 #define   VIA_REG_SGD_STAT_PB_EOL       (1<<4)
 134 #define   VIA_REG_SGD_STAT_CP_EOL       (1<<5)
 135 #define   VIA_REG_SGD_STAT_FM_EOL       (1<<6)
 136 #define   VIA_REG_SGD_STAT_PB_STOP      (1<<8)
 137 #define   VIA_REG_SGD_STAT_CP_STOP      (1<<9)
 138 #define   VIA_REG_SGD_STAT_FM_STOP      (1<<10)
 139 #define   VIA_REG_SGD_STAT_PB_ACTIVE    (1<<12)
 140 #define   VIA_REG_SGD_STAT_CP_ACTIVE    (1<<13)
 141 #define   VIA_REG_SGD_STAT_FM_ACTIVE    (1<<14)
 142 #define   VIA_REG_SGD_STAT_MR_FLAG      (1<<16)
 143 #define   VIA_REG_SGD_STAT_MW_FLAG      (1<<17)
 144 #define   VIA_REG_SGD_STAT_MR_EOL       (1<<20)
 145 #define   VIA_REG_SGD_STAT_MW_EOL       (1<<21)
 146 #define   VIA_REG_SGD_STAT_MR_STOP      (1<<24)
 147 #define   VIA_REG_SGD_STAT_MW_STOP      (1<<25)
 148 #define   VIA_REG_SGD_STAT_MR_ACTIVE    (1<<28)
 149 #define   VIA_REG_SGD_STAT_MW_ACTIVE    (1<<29)
 150
 151 #define VIA_REG_GPI_STATUS              0x88
 152 #define VIA_REG_GPI_INTR                0x8c
 153
 154 #define VIA_TBL_BIT_FLAG        0x40000000
 155 #define VIA_TBL_BIT_EOL         0x80000000
 156
 157 /* pci space */
 158 #define VIA_ACLINK_STAT         0x40
 159 #define  VIA_ACLINK_C11_READY   0x20
 160 #define  VIA_ACLINK_C10_READY   0x10
 161 #define  VIA_ACLINK_C01_READY   0x04 /* secondary codec ready */
 162 #define  VIA_ACLINK_LOWPOWER    0x02 /* low-power state */
 163 #define  VIA_ACLINK_C00_READY   0x01 /* primary codec ready */
 164 #define VIA_ACLINK_CTRL         0x41
 165 #define  VIA_ACLINK_CTRL_ENABLE 0x80 /* 0: disable, 1: enable */
 166 #define  VIA_ACLINK_CTRL_RESET  0x40 /* 0: assert, 1: de-assert */
 167 #define  VIA_ACLINK_CTRL_SYNC   0x20 /* 0: release SYNC, 1: force SYNC hi */
 168 #define  VIA_ACLINK_CTRL_SDO    0x10 /* 0: release SDO, 1: force SDO hi */
 169 #define  VIA_ACLINK_CTRL_VRA    0x08 /* 0: disable VRA, 1: enable VRA */
 170 #define  VIA_ACLINK_CTRL_PCM    0x04 /* 0: disable PCM, 1: enable PCM */
 171 #define  VIA_ACLINK_CTRL_FM     0x02 /* via686 only */
 172 #define  VIA_ACLINK_CTRL_SB     0x01 /* via686 only */
 173 #define  VIA_ACLINK_CTRL_INIT   (VIA_ACLINK_CTRL_ENABLE|\
 174                                  VIA_ACLINK_CTRL_RESET|\
 175                                  VIA_ACLINK_CTRL_PCM)
 176 #define VIA_FUNC_ENABLE         0x42
 177 #define  VIA_FUNC_MIDI_PNP      0x80 /* FIXME: it's 0x40 in the datasheet! */
 178 #define  VIA_FUNC_MIDI_IRQMASK  0x40 /* FIXME: not documented! */
 179 #define  VIA_FUNC_RX2C_WRITE    0x20
 180 #define  VIA_FUNC_SB_FIFO_EMPTY 0x10
 181 #define  VIA_FUNC_ENABLE_GAME   0x08
 182 #define  VIA_FUNC_ENABLE_FM     0x04
 183 #define  VIA_FUNC_ENABLE_MIDI   0x02
 184 #define  VIA_FUNC_ENABLE_SB     0x01
 185 #define VIA_PNP_CONTROL         0x43
 186 #define VIA_MC97_CTRL           0x44
 187 #define  VIA_MC97_CTRL_ENABLE   0x80
 188 #define  VIA_MC97_CTRL_SECONDARY 0x40
 189 #define  VIA_MC97_CTRL_INIT     (VIA_MC97_CTRL_ENABLE|\
 190                                  VIA_MC97_CTRL_SECONDARY)
 191
 192
 193 /*
 194  * pcm stream
 195  */
 196
 197 struct snd_via_sg_table {
 198         unsigned int offset;
 199         unsigned int size;
 200 } ;
 201
 202 #define VIA_TABLE_SIZE  255
 203
 204 struct viadev {
 205         unsigned int reg_offset;
 206         unsigned long port;
 207         int direction;  /* playback = 0, capture = 1 */
 208         struct snd_pcm_substream *substream;
 209         int running;
 210         unsigned int tbl_entries; /* # descriptors */
 211         struct snd_dma_buffer table;
 212         struct snd_via_sg_table *idx_table;
 213         /* for recovery from the unexpected pointer */
 214         unsigned int lastpos;
 215         unsigned int bufsize;
 216         unsigned int bufsize2;
 217 };
 218
 219 enum { TYPE_CARD_VIA82XX_MODEM = 1 };
 220
 221 #define VIA_MAX_MODEM_DEVS      2
 222
 223 struct via82xx_modem {
 224         int irq;
 225
 226         unsigned long port;
 227
 228         unsigned int intr_mask; /* SGD_SHADOW mask to check interrupts */
 229
 230         struct pci_dev *pci;
 231         struct snd_card *card;
 232
 233         unsigned int num_devs;
 234         unsigned int playback_devno, capture_devno;
 235         struct viadev devs[VIA_MAX_MODEM_DEVS];
 236
 237         struct snd_pcm *pcms[2];
 238
 239         struct snd_ac97_bus *ac97_bus;
 240         struct snd_ac97 *ac97;
 241         unsigned int ac97_clock;
 242         unsigned int ac97_secondary;    /* secondary AC'97 codec is present */
 243
 244         spinlock_t reg_lock;
 245         struct snd_info_entry *proc_entry;
 246 };
 247
 248 static const struct pci_device_id snd_via82xx_modem_ids[] = {
 249         { PCI_VDEVICE(VIA, 0x3068), TYPE_CARD_VIA82XX_MODEM, },
 250         { 0, }
 251 };
 252
 253 MODULE_DEVICE_TABLE(pci, snd_via82xx_modem_ids);
 254
 255 /*
 256  */
 257
 258 /*
 259  * allocate and initialize the descriptor buffers
 260  * periods = number of periods
 261  * fragsize = period size in bytes
 262  */
 263 static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
 264                            struct pci_dev *pci,
 265                            unsigned int periods, unsigned int fragsize)
 266 {
 267         unsigned int i, idx, ofs, rest;
 268         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 269         __le32 *pgtbl;
 270
 271         if (dev->table.area == NULL) {
 272                 /* the start of each lists must be aligned to 8 bytes,
 273                  * but the kernel pages are much bigger, so we don't care
 274                  */
 275                 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, &chip->pci->dev,
 276                                         PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8),
 277                                         &dev->table) < 0)
 278                         return -ENOMEM;
 279         }
 280         if (! dev->idx_table) {
 281                 dev->idx_table = kmalloc_array(VIA_TABLE_SIZE,
 282                                                sizeof(*dev->idx_table),
 283                                                GFP_KERNEL);
 284                 if (! dev->idx_table)
 285                         return -ENOMEM;
 286         }
 287
 288         /* fill the entries */
 289         idx = 0;
 290         ofs = 0;
 291         pgtbl = (__le32 *)dev->table.area;
 292         for (i = 0; i < periods; i++) {
 293                 rest = fragsize;
 294                 /* fill descriptors for a period.
 295                  * a period can be split to several descriptors if it's
 296                  * over page boundary.
 297                  */
 298                 do {
 299                         unsigned int r;
 300                         unsigned int flag;
 301                         unsigned int addr;
 302
 303                         if (idx >= VIA_TABLE_SIZE) {
 304                                 dev_err(&pci->dev, "too much table size!\n");
 305                                 return -EINVAL;
 306                         }
 307                         addr = snd_pcm_sgbuf_get_addr(substream, ofs);
 308                         pgtbl[idx << 1] = cpu_to_le32(addr);
 309                         r = PAGE_SIZE - (ofs % PAGE_SIZE);
 310                         if (rest < r)
 311                                 r = rest;
 312                         rest -= r;
 313                         if (! rest) {
 314                                 if (i == periods - 1)
 315                                         flag = VIA_TBL_BIT_EOL; /* buffer boundary */
 316                                 else
 317                                         flag = VIA_TBL_BIT_FLAG; /* period boundary */
 318                         } else
 319                                 flag = 0; /* period continues to the next */
 320                         /*
 321                         dev_dbg(&pci->dev,
 322                                 "tbl %d: at %d  size %d (rest %d)\n",
 323                                 idx, ofs, r, rest);
 324                         */
 325                         pgtbl[(idx<<1) + 1] = cpu_to_le32(r | flag);
 326                         dev->idx_table[idx].offset = ofs;
 327                         dev->idx_table[idx].size = r;
 328                         ofs += r;
 329                         idx++;
 330                 } while (rest > 0);
 331         }
 332         dev->tbl_entries = idx;
 333         dev->bufsize = periods * fragsize;
 334         dev->bufsize2 = dev->bufsize / 2;
 335         return 0;
 336 }
 337
 338
 339 static int clean_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
 340                            struct pci_dev *pci)
 341 {
 342         if (dev->table.area) {
 343                 snd_dma_free_pages(&dev->table);
 344                 dev->table.area = NULL;
 345         }
 346         kfree(dev->idx_table);
 347         dev->idx_table = NULL;
 348         return 0;
 349 }
 350
 351 /*
 352  *  Basic I/O
 353  */
 354
 355 static inline unsigned int snd_via82xx_codec_xread(struct via82xx_modem *chip)
 356 {
 357         return inl(VIAREG(chip, AC97));
 358 }
 359
 360 static inline void snd_via82xx_codec_xwrite(struct via82xx_modem *chip, unsigned int val)
 361 {
 362         outl(val, VIAREG(chip, AC97));
 363 }
 364
 365 static int snd_via82xx_codec_ready(struct via82xx_modem *chip, int secondary)
 366 {
 367         unsigned int timeout = 1000;    /* 1ms */
 368         unsigned int val;
 369
 370         while (timeout-- > 0) {
 371                 udelay(1);
 372                 if (!((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY))
 373                         return val & 0xffff;
 374         }
 375         dev_err(chip->card->dev, "codec_ready: codec %i is not ready [0x%x]\n",
 376                    secondary, snd_via82xx_codec_xread(chip));
 377         return -EIO;
 378 }
 379
 380 static int snd_via82xx_codec_valid(struct via82xx_modem *chip, int secondary)
 381 {
 382         unsigned int timeout = 1000;    /* 1ms */
 383         unsigned int val, val1;
 384         unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
 385                                          VIA_REG_AC97_SECONDARY_VALID;
 386
 387         while (timeout-- > 0) {
 388                 val = snd_via82xx_codec_xread(chip);
 389                 val1 = val & (VIA_REG_AC97_BUSY | stat);
 390                 if (val1 == stat)
 391                         return val & 0xffff;
 392                 udelay(1);
 393         }
 394         return -EIO;
 395 }
 396
 397 static void snd_via82xx_codec_wait(struct snd_ac97 *ac97)
 398 {
 399         struct via82xx_modem *chip = ac97->private_data;
 400         __always_unused int err;
 401         err = snd_via82xx_codec_ready(chip, ac97->num);
 402         /* here we need to wait fairly for long time.. */
 403         msleep(500);
 404 }
 405
 406 static void snd_via82xx_codec_write(struct snd_ac97 *ac97,
 407                                     unsigned short reg,
 408                                     unsigned short val)
 409 {
 410         struct via82xx_modem *chip = ac97->private_data;
 411         unsigned int xval;
 412         if(reg == AC97_GPIO_STATUS) {
 413                 outl(val, VIAREG(chip, GPI_STATUS));
 414                 return;
 415         }
 416         xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
 417         xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
 418         xval |= reg << VIA_REG_AC97_CMD_SHIFT;
 419         xval |= val << VIA_REG_AC97_DATA_SHIFT;
 420         snd_via82xx_codec_xwrite(chip, xval);
 421         snd_via82xx_codec_ready(chip, ac97->num);
 422 }
 423
 424 static unsigned short snd_via82xx_codec_read(struct snd_ac97 *ac97, unsigned short reg)
 425 {
 426         struct via82xx_modem *chip = ac97->private_data;
 427         unsigned int xval, val = 0xffff;
 428         int again = 0;
 429
 430         xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
 431         xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
 432         xval |= VIA_REG_AC97_READ;
 433         xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
 434         while (1) {
 435                 if (again++ > 3) {
 436                         dev_err(chip->card->dev,
 437                                 "codec_read: codec %i is not valid [0x%x]\n",
 438                                    ac97->num, snd_via82xx_codec_xread(chip));
 439                         return 0xffff;
 440                 }
 441                 snd_via82xx_codec_xwrite(chip, xval);
 442                 udelay (20);
 443                 if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) {
 444                         udelay(25);
 445                         val = snd_via82xx_codec_xread(chip);
 446                         break;
 447                 }
 448         }
 449         return val & 0xffff;
 450 }
 451
 452 static void snd_via82xx_channel_reset(struct via82xx_modem *chip, struct viadev *viadev)
 453 {
 454         outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET,
 455              VIADEV_REG(viadev, OFFSET_CONTROL));
 456         inb(VIADEV_REG(viadev, OFFSET_CONTROL));
 457         udelay(50);
 458         /* disable interrupts */
 459         outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL));
 460         /* clear interrupts */
 461         outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS));
 462         outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */
 463         // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
 464         viadev->lastpos = 0;
 465 }
 466
 467
 468 /*
 469  *  Interrupt handler
 470  */
 471
 472 static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id)
 473 {
 474         struct via82xx_modem *chip = dev_id;
 475         unsigned int status;
 476         unsigned int i;
 477
 478         status = inl(VIAREG(chip, SGD_SHADOW));
 479         if (! (status & chip->intr_mask)) {
 480                 return IRQ_NONE;
 481         }
 482 // _skip_sgd:
 483
 484         /* check status for each stream */
 485         spin_lock(&chip->reg_lock);
 486         for (i = 0; i < chip->num_devs; i++) {
 487                 struct viadev *viadev = &chip->devs[i];
 488                 unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
 489                 c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED);
 490                 if (! c_status)
 491                         continue;
 492                 if (viadev->substream && viadev->running) {
 493                         spin_unlock(&chip->reg_lock);
 494                         snd_pcm_period_elapsed(viadev->substream);
 495                         spin_lock(&chip->reg_lock);
 496                 }
 497                 outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
 498         }
 499         spin_unlock(&chip->reg_lock);
 500         return IRQ_HANDLED;
 501 }
 502
 503 /*
 504  *  PCM callbacks
 505  */
 506
 507 /*
 508  * trigger callback
 509  */
 510 static int snd_via82xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 511 {
 512         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 513         struct viadev *viadev = substream->runtime->private_data;
 514         unsigned char val = 0;
 515
 516         switch (cmd) {
 517         case SNDRV_PCM_TRIGGER_START:
 518         case SNDRV_PCM_TRIGGER_SUSPEND:
 519                 val |= VIA_REG_CTRL_START;
 520                 viadev->running = 1;
 521                 break;
 522         case SNDRV_PCM_TRIGGER_STOP:
 523                 val = VIA_REG_CTRL_TERMINATE;
 524                 viadev->running = 0;
 525                 break;
 526         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 527                 val |= VIA_REG_CTRL_PAUSE;
 528                 viadev->running = 0;
 529                 break;
 530         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 531                 viadev->running = 1;
 532                 break;
 533         default:
 534                 return -EINVAL;
 535         }
 536         outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
 537         if (cmd == SNDRV_PCM_TRIGGER_STOP)
 538                 snd_via82xx_channel_reset(chip, viadev);
 539         return 0;
 540 }
 541
 542 /*
 543  * pointer callbacks
 544  */
 545
 546 /*
 547  * calculate the linear position at the given sg-buffer index and the rest count
 548  */
 549
 550 #define check_invalid_pos(viadev,pos) \
 551         ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 ||\
 552                                      viadev->lastpos < viadev->bufsize2))
 553
 554 static inline unsigned int calc_linear_pos(struct via82xx_modem *chip,
 555                                            struct viadev *viadev,
 556                                            unsigned int idx,
 557                                            unsigned int count)
 558 {
 559         unsigned int size, res;
 560
 561         size = viadev->idx_table[idx].size;
 562         res = viadev->idx_table[idx].offset + size - count;
 563
 564         /* check the validity of the calculated position */
 565         if (size < count) {
 566                 dev_err(chip->card->dev,
 567                         "invalid via82xx_cur_ptr (size = %d, count = %d)\n",
 568                            (int)size, (int)count);
 569                 res = viadev->lastpos;
 570         } else if (check_invalid_pos(viadev, res)) {
 571 #ifdef POINTER_DEBUG
 572                 dev_dbg(chip->card->dev,
 573                         "fail: idx = %i/%i, lastpos = 0x%x, bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, count = 0x%x\n",
 574                         idx, viadev->tbl_entries, viadev->lastpos,
 575                        viadev->bufsize2, viadev->idx_table[idx].offset,
 576                        viadev->idx_table[idx].size, count);
 577 #endif
 578                 if (count && size < count) {
 579                         dev_dbg(chip->card->dev,
 580                                 "invalid via82xx_cur_ptr, using last valid pointer\n");
 581                         res = viadev->lastpos;
 582                 } else {
 583                         if (! count)
 584                                 /* bogus count 0 on the DMA boundary? */
 585                                 res = viadev->idx_table[idx].offset;
 586                         else
 587                                 /* count register returns full size
 588                                  * when end of buffer is reached
 589                                  */
 590                                 res = viadev->idx_table[idx].offset + size;
 591                         if (check_invalid_pos(viadev, res)) {
 592                                 dev_dbg(chip->card->dev,
 593                                         "invalid via82xx_cur_ptr (2), using last valid pointer\n");
 594                                 res = viadev->lastpos;
 595                         }
 596                 }
 597         }
 598         viadev->lastpos = res; /* remember the last position */
 599         if (res >= viadev->bufsize)
 600                 res -= viadev->bufsize;
 601         return res;
 602 }
 603
 604 /*
 605  * get the current pointer on via686
 606  */
 607 static snd_pcm_uframes_t snd_via686_pcm_pointer(struct snd_pcm_substream *substream)
 608 {
 609         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 610         struct viadev *viadev = substream->runtime->private_data;
 611         unsigned int idx, ptr, count, res;
 612
 613         if (snd_BUG_ON(!viadev->tbl_entries))
 614                 return 0;
 615         if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
 616                 return 0;
 617
 618         spin_lock(&chip->reg_lock);
 619         count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
 620         /* The via686a does not have the current index register,
 621          * so we need to calculate the index from CURR_PTR.
 622          */
 623         ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
 624         if (ptr <= (unsigned int)viadev->table.addr)
 625                 idx = 0;
 626         else /* CURR_PTR holds the address + 8 */
 627                 idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) %
 628                         viadev->tbl_entries;
 629         res = calc_linear_pos(chip, viadev, idx, count);
 630         spin_unlock(&chip->reg_lock);
 631
 632         return bytes_to_frames(substream->runtime, res);
 633 }
 634
 635 /*
 636  * hw_params callback:
 637  * allocate the buffer and build up the buffer description table
 638  */
 639 static int snd_via82xx_hw_params(struct snd_pcm_substream *substream,
 640                                  struct snd_pcm_hw_params *hw_params)
 641 {
 642         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 643         struct viadev *viadev = substream->runtime->private_data;
 644         int err;
 645
 646         err = build_via_table(viadev, substream, chip->pci,
 647                               params_periods(hw_params),
 648                               params_period_bytes(hw_params));
 649         if (err < 0)
 650                 return err;
 651
 652         snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params));
 653         snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0);
 654
 655         return 0;
 656 }
 657
 658 /*
 659  * hw_free callback:
 660  * clean up the buffer description table and release the buffer
 661  */
 662 static int snd_via82xx_hw_free(struct snd_pcm_substream *substream)
 663 {
 664         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 665         struct viadev *viadev = substream->runtime->private_data;
 666
 667         clean_via_table(viadev, substream, chip->pci);
 668         return 0;
 669 }
 670
 671
 672 /*
 673  * set up the table pointer
 674  */
 675 static void snd_via82xx_set_table_ptr(struct via82xx_modem *chip, struct viadev *viadev)
 676 {
 677         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 678         outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
 679         udelay(20);
 680         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 681 }
 682
 683 /*
 684  * prepare callback for playback and capture
 685  */
 686 static int snd_via82xx_pcm_prepare(struct snd_pcm_substream *substream)
 687 {
 688         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 689         struct viadev *viadev = substream->runtime->private_data;
 690
 691         snd_via82xx_channel_reset(chip, viadev);
 692         /* this must be set after channel_reset */
 693         snd_via82xx_set_table_ptr(chip, viadev);
 694         outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG,
 695              VIADEV_REG(viadev, OFFSET_TYPE));
 696         return 0;
 697 }
 698
 699 /*
 700  * pcm hardware definition, identical for both playback and capture
 701  */
 702 static const struct snd_pcm_hardware snd_via82xx_hw =
 703 {
 704         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 705                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 706                                  SNDRV_PCM_INFO_MMAP_VALID |
 707                                  /* SNDRV_PCM_INFO_RESUME | */
 708                                  SNDRV_PCM_INFO_PAUSE),
 709         .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
 710         .rates =                SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
 711         .rate_min =             8000,
 712         .rate_max =             16000,
 713         .channels_min =         1,
 714         .channels_max =         1,
 715         .buffer_bytes_max =     128 * 1024,
 716         .period_bytes_min =     32,
 717         .period_bytes_max =     128 * 1024,
 718         .periods_min =          2,
 719         .periods_max =          VIA_TABLE_SIZE / 2,
 720         .fifo_size =            0,
 721 };
 722
 723
 724 /*
 725  * open callback skeleton
 726  */
 727 static int snd_via82xx_modem_pcm_open(struct via82xx_modem *chip, struct viadev *viadev,
 728                                       struct snd_pcm_substream *substream)
 729 {
 730         struct snd_pcm_runtime *runtime = substream->runtime;
 731         int err;
 732         static const unsigned int rates[] = { 8000,  9600, 12000, 16000 };
 733         static const struct snd_pcm_hw_constraint_list hw_constraints_rates = {
 734                 .count = ARRAY_SIZE(rates),
 735                 .list = rates,
 736                 .mask = 0,
 737         };
 738
 739         runtime->hw = snd_via82xx_hw;
 740
 741         if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 742                                               &hw_constraints_rates)) < 0)
 743                 return err;
 744
 745         /* we may remove following constaint when we modify table entries
 746            in interrupt */
 747         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 748                 return err;
 749
 750         runtime->private_data = viadev;
 751         viadev->substream = substream;
 752
 753         return 0;
 754 }
 755
 756
 757 /*
 758  * open callback for playback
 759  */
 760 static int snd_via82xx_playback_open(struct snd_pcm_substream *substream)
 761 {
 762         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 763         struct viadev *viadev = &chip->devs[chip->playback_devno + substream->number];
 764
 765         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 766 }
 767
 768 /*
 769  * open callback for capture
 770  */
 771 static int snd_via82xx_capture_open(struct snd_pcm_substream *substream)
 772 {
 773         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 774         struct viadev *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
 775
 776         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 777 }
 778
 779 /*
 780  * close callback
 781  */
 782 static int snd_via82xx_pcm_close(struct snd_pcm_substream *substream)
 783 {
 784         struct viadev *viadev = substream->runtime->private_data;
 785
 786         viadev->substream = NULL;
 787         return 0;
 788 }
 789
 790
 791 /* via686 playback callbacks */
 792 static const struct snd_pcm_ops snd_via686_playback_ops = {
 793         .open =         snd_via82xx_playback_open,
 794         .close =        snd_via82xx_pcm_close,
 795         .hw_params =    snd_via82xx_hw_params,
 796         .hw_free =      snd_via82xx_hw_free,
 797         .prepare =      snd_via82xx_pcm_prepare,
 798         .trigger =      snd_via82xx_pcm_trigger,
 799         .pointer =      snd_via686_pcm_pointer,
 800 };
 801
 802 /* via686 capture callbacks */
 803 static const struct snd_pcm_ops snd_via686_capture_ops = {
 804         .open =         snd_via82xx_capture_open,
 805         .close =        snd_via82xx_pcm_close,
 806         .hw_params =    snd_via82xx_hw_params,
 807         .hw_free =      snd_via82xx_hw_free,
 808         .prepare =      snd_via82xx_pcm_prepare,
 809         .trigger =      snd_via82xx_pcm_trigger,
 810         .pointer =      snd_via686_pcm_pointer,
 811 };
 812
 813
 814 static void init_viadev(struct via82xx_modem *chip, int idx, unsigned int reg_offset,
 815                         int direction)
 816 {
 817         chip->devs[idx].reg_offset = reg_offset;
 818         chip->devs[idx].direction = direction;
 819         chip->devs[idx].port = chip->port + reg_offset;
 820 }
 821
 822 /*
 823  * create a pcm instance for via686a/b
 824  */
 825 static int snd_via686_pcm_new(struct via82xx_modem *chip)
 826 {
 827         struct snd_pcm *pcm;
 828         int err;
 829
 830         chip->playback_devno = 0;
 831         chip->capture_devno = 1;
 832         chip->num_devs = 2;
 833         chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */
 834
 835         err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
 836         if (err < 0)
 837                 return err;
 838         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
 839         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
 840         pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
 841         pcm->private_data = chip;
 842         strcpy(pcm->name, chip->card->shortname);
 843         chip->pcms[0] = pcm;
 844         init_viadev(chip, 0, VIA_REG_MO_STATUS, 0);
 845         init_viadev(chip, 1, VIA_REG_MI_STATUS, 1);
 846
 847         snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
 848                                        &chip->pci->dev, 64*1024, 128*1024);
 849         return 0;
 850 }
 851
 852
 853 /*
 854  *  Mixer part
 855  */
 856
 857
 858 static void snd_via82xx_mixer_free_ac97_bus(struct snd_ac97_bus *bus)
 859 {
 860         struct via82xx_modem *chip = bus->private_data;
 861         chip->ac97_bus = NULL;
 862 }
 863
 864 static void snd_via82xx_mixer_free_ac97(struct snd_ac97 *ac97)
 865 {
 866         struct via82xx_modem *chip = ac97->private_data;
 867         chip->ac97 = NULL;
 868 }
 869
 870
 871 static int snd_via82xx_mixer_new(struct via82xx_modem *chip)
 872 {
 873         struct snd_ac97_template ac97;
 874         int err;
 875         static const struct snd_ac97_bus_ops ops = {
 876                 .write = snd_via82xx_codec_write,
 877                 .read = snd_via82xx_codec_read,
 878                 .wait = snd_via82xx_codec_wait,
 879         };
 880
 881         if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
 882                 return err;
 883         chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
 884         chip->ac97_bus->clock = chip->ac97_clock;
 885
 886         memset(&ac97, 0, sizeof(ac97));
 887         ac97.private_data = chip;
 888         ac97.private_free = snd_via82xx_mixer_free_ac97;
 889         ac97.pci = chip->pci;
 890         ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;
 891         ac97.num = chip->ac97_secondary;
 892
 893         if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
 894                 return err;
 895
 896         return 0;
 897 }
 898
 899
 900 /*
 901  * proc interface
 902  */
 903 static void snd_via82xx_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
 904 {
 905         struct via82xx_modem *chip = entry->private_data;
 906         int i;
 907
 908         snd_iprintf(buffer, "%s\n\n", chip->card->longname);
 909         for (i = 0; i < 0xa0; i += 4) {
 910                 snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
 911         }
 912 }
 913
 914 static void snd_via82xx_proc_init(struct via82xx_modem *chip)
 915 {
 916         snd_card_ro_proc_new(chip->card, "via82xx", chip,
 917                              snd_via82xx_proc_read);
 918 }
 919
 920 /*
 921  *
 922  */
 923
 924 static int snd_via82xx_chip_init(struct via82xx_modem *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                 dev_err(chip->card->dev,
 976                         "AC'97 codec is not ready [0x%x]\n", val);
 977
 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         end_time = jiffies + msecs_to_jiffies(750);
 982         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
 983                                  VIA_REG_AC97_SECONDARY_VALID |
 984                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
 985         do {
 986                 if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) {
 987                         chip->ac97_secondary = 1;
 988                         goto __ac97_ok2;
 989                 }
 990                 schedule_timeout_uninterruptible(1);
 991         } while (time_before(jiffies, end_time));
 992         /* This is ok, the most of motherboards have only one codec */
 993
 994       __ac97_ok2:
 995
 996         /* route FM trap to IRQ, disable FM trap */
 997         // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
 998         /* disable all GPI interrupts */
 999         outl(0, VIAREG(chip, GPI_INTR));
1000
1001         return 0;
1002 }
1003
1004 #ifdef CONFIG_PM_SLEEP
1005 /*
1006  * power management
1007  */
1008 static int snd_via82xx_suspend(struct device *dev)
1009 {
1010         struct snd_card *card = dev_get_drvdata(dev);
1011         struct via82xx_modem *chip = card->private_data;
1012         int i;
1013
1014         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1015         for (i = 0; i < chip->num_devs; i++)
1016                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1017         snd_ac97_suspend(chip->ac97);
1018         return 0;
1019 }
1020
1021 static int snd_via82xx_resume(struct device *dev)
1022 {
1023         struct snd_card *card = dev_get_drvdata(dev);
1024         struct via82xx_modem *chip = card->private_data;
1025         int i;
1026
1027         snd_via82xx_chip_init(chip);
1028
1029         snd_ac97_resume(chip->ac97);
1030
1031         for (i = 0; i < chip->num_devs; i++)
1032                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1033
1034         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1035         return 0;
1036 }
1037
1038 static SIMPLE_DEV_PM_OPS(snd_via82xx_pm, snd_via82xx_suspend, snd_via82xx_resume);
1039 #define SND_VIA82XX_PM_OPS      &snd_via82xx_pm
1040 #else
1041 #define SND_VIA82XX_PM_OPS      NULL
1042 #endif /* CONFIG_PM_SLEEP */
1043
1044 static int snd_via82xx_free(struct via82xx_modem *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
1054       __end_hw:
1055         if (chip->irq >= 0)
1056                 free_irq(chip->irq, 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(struct snd_device *device)
1064 {
1065         struct via82xx_modem *chip = device->device_data;
1066         return snd_via82xx_free(chip);
1067 }
1068
1069 static int snd_via82xx_create(struct snd_card *card,
1070                               struct pci_dev *pci,
1071                               int chip_type,
1072                               int revision,
1073                               unsigned int ac97_clock,
1074                               struct via82xx_modem **r_via)
1075 {
1076         struct via82xx_modem *chip;
1077         int err;
1078         static const struct snd_device_ops 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, IRQF_SHARED,
1102                         KBUILD_MODNAME, chip)) {
1103                 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
1104                 snd_via82xx_free(chip);
1105                 return -EBUSY;
1106         }
1107         chip->irq = pci->irq;
1108         card->sync_irq = chip->irq;
1109         if (ac97_clock >= 8000 && ac97_clock <= 48000)
1110                 chip->ac97_clock = ac97_clock;
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         *r_via = chip;
1128         return 0;
1129 }
1130
1131
1132 static int snd_via82xx_probe(struct pci_dev *pci,
1133                              const struct pci_device_id *pci_id)
1134 {
1135         struct snd_card *card;
1136         struct via82xx_modem *chip;
1137         int chip_type = 0, card_type;
1138         unsigned int i;
1139         int err;
1140
1141         err = snd_card_new(&pci->dev, index, id, THIS_MODULE, 0, &card);
1142         if (err < 0)
1143                 return err;
1144
1145         card_type = pci_id->driver_data;
1146         switch (card_type) {
1147         case TYPE_CARD_VIA82XX_MODEM:
1148                 strcpy(card->driver, "VIA82XX-MODEM");
1149                 sprintf(card->shortname, "VIA 82XX modem");
1150                 break;
1151         default:
1152                 dev_err(card->dev, "invalid card type %d\n", card_type);
1153                 err = -EINVAL;
1154                 goto __error;
1155         }
1156
1157         if ((err = snd_via82xx_create(card, pci, chip_type, pci->revision,
1158                                       ac97_clock, &chip)) < 0)
1159                 goto __error;
1160         card->private_data = chip;
1161         if ((err = snd_via82xx_mixer_new(chip)) < 0)
1162                 goto __error;
1163
1164         if ((err = snd_via686_pcm_new(chip)) < 0 )
1165                 goto __error;
1166
1167         /* disable interrupts */
1168         for (i = 0; i < chip->num_devs; i++)
1169                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1170
1171         sprintf(card->longname, "%s at 0x%lx, irq %d",
1172                 card->shortname, chip->port, chip->irq);
1173
1174         snd_via82xx_proc_init(chip);
1175
1176         if ((err = snd_card_register(card)) < 0) {
1177                 snd_card_free(card);
1178                 return err;
1179         }
1180         pci_set_drvdata(pci, card);
1181         return 0;
1182
1183  __error:
1184         snd_card_free(card);
1185         return err;
1186 }
1187
1188 static void snd_via82xx_remove(struct pci_dev *pci)
1189 {
1190         snd_card_free(pci_get_drvdata(pci));
1191 }
1192
1193 static struct pci_driver via82xx_modem_driver = {
1194         .name = KBUILD_MODNAME,
1195         .id_table = snd_via82xx_modem_ids,
1196         .probe = snd_via82xx_probe,
1197         .remove = snd_via82xx_remove,
1198         .driver = {
1199                 .pm = SND_VIA82XX_PM_OPS,
1200         },
1201 };
1202
1203 module_pci_driver(via82xx_modem_driver);