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                 val = snd_via82xx_codec_xread(chip);
 373                 if (!(val & VIA_REG_AC97_BUSY))
 374                         return val & 0xffff;
 375         }
 376         dev_err(chip->card->dev, "codec_ready: codec %i is not ready [0x%x]\n",
 377                    secondary, snd_via82xx_codec_xread(chip));
 378         return -EIO;
 379 }
 380
 381 static int snd_via82xx_codec_valid(struct via82xx_modem *chip, int secondary)
 382 {
 383         unsigned int timeout = 1000;    /* 1ms */
 384         unsigned int val, val1;
 385         unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
 386                                          VIA_REG_AC97_SECONDARY_VALID;
 387
 388         while (timeout-- > 0) {
 389                 val = snd_via82xx_codec_xread(chip);
 390                 val1 = val & (VIA_REG_AC97_BUSY | stat);
 391                 if (val1 == stat)
 392                         return val & 0xffff;
 393                 udelay(1);
 394         }
 395         return -EIO;
 396 }
 397
 398 static void snd_via82xx_codec_wait(struct snd_ac97 *ac97)
 399 {
 400         struct via82xx_modem *chip = ac97->private_data;
 401         __always_unused int err;
 402         err = snd_via82xx_codec_ready(chip, ac97->num);
 403         /* here we need to wait fairly for long time.. */
 404         msleep(500);
 405 }
 406
 407 static void snd_via82xx_codec_write(struct snd_ac97 *ac97,
 408                                     unsigned short reg,
 409                                     unsigned short val)
 410 {
 411         struct via82xx_modem *chip = ac97->private_data;
 412         unsigned int xval;
 413         if(reg == AC97_GPIO_STATUS) {
 414                 outl(val, VIAREG(chip, GPI_STATUS));
 415                 return;
 416         }
 417         xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
 418         xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
 419         xval |= reg << VIA_REG_AC97_CMD_SHIFT;
 420         xval |= val << VIA_REG_AC97_DATA_SHIFT;
 421         snd_via82xx_codec_xwrite(chip, xval);
 422         snd_via82xx_codec_ready(chip, ac97->num);
 423 }
 424
 425 static unsigned short snd_via82xx_codec_read(struct snd_ac97 *ac97, unsigned short reg)
 426 {
 427         struct via82xx_modem *chip = ac97->private_data;
 428         unsigned int xval, val = 0xffff;
 429         int again = 0;
 430
 431         xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
 432         xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
 433         xval |= VIA_REG_AC97_READ;
 434         xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
 435         while (1) {
 436                 if (again++ > 3) {
 437                         dev_err(chip->card->dev,
 438                                 "codec_read: codec %i is not valid [0x%x]\n",
 439                                    ac97->num, snd_via82xx_codec_xread(chip));
 440                         return 0xffff;
 441                 }
 442                 snd_via82xx_codec_xwrite(chip, xval);
 443                 udelay (20);
 444                 if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) {
 445                         udelay(25);
 446                         val = snd_via82xx_codec_xread(chip);
 447                         break;
 448                 }
 449         }
 450         return val & 0xffff;
 451 }
 452
 453 static void snd_via82xx_channel_reset(struct via82xx_modem *chip, struct viadev *viadev)
 454 {
 455         outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET,
 456              VIADEV_REG(viadev, OFFSET_CONTROL));
 457         inb(VIADEV_REG(viadev, OFFSET_CONTROL));
 458         udelay(50);
 459         /* disable interrupts */
 460         outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL));
 461         /* clear interrupts */
 462         outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS));
 463         outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */
 464         // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
 465         viadev->lastpos = 0;
 466 }
 467
 468
 469 /*
 470  *  Interrupt handler
 471  */
 472
 473 static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id)
 474 {
 475         struct via82xx_modem *chip = dev_id;
 476         unsigned int status;
 477         unsigned int i;
 478
 479         status = inl(VIAREG(chip, SGD_SHADOW));
 480         if (! (status & chip->intr_mask)) {
 481                 return IRQ_NONE;
 482         }
 483 // _skip_sgd:
 484
 485         /* check status for each stream */
 486         spin_lock(&chip->reg_lock);
 487         for (i = 0; i < chip->num_devs; i++) {
 488                 struct viadev *viadev = &chip->devs[i];
 489                 unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
 490                 c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED);
 491                 if (! c_status)
 492                         continue;
 493                 if (viadev->substream && viadev->running) {
 494                         spin_unlock(&chip->reg_lock);
 495                         snd_pcm_period_elapsed(viadev->substream);
 496                         spin_lock(&chip->reg_lock);
 497                 }
 498                 outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
 499         }
 500         spin_unlock(&chip->reg_lock);
 501         return IRQ_HANDLED;
 502 }
 503
 504 /*
 505  *  PCM callbacks
 506  */
 507
 508 /*
 509  * trigger callback
 510  */
 511 static int snd_via82xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 512 {
 513         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 514         struct viadev *viadev = substream->runtime->private_data;
 515         unsigned char val = 0;
 516
 517         switch (cmd) {
 518         case SNDRV_PCM_TRIGGER_START:
 519         case SNDRV_PCM_TRIGGER_SUSPEND:
 520                 val |= VIA_REG_CTRL_START;
 521                 viadev->running = 1;
 522                 break;
 523         case SNDRV_PCM_TRIGGER_STOP:
 524                 val = VIA_REG_CTRL_TERMINATE;
 525                 viadev->running = 0;
 526                 break;
 527         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 528                 val |= VIA_REG_CTRL_PAUSE;
 529                 viadev->running = 0;
 530                 break;
 531         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 532                 viadev->running = 1;
 533                 break;
 534         default:
 535                 return -EINVAL;
 536         }
 537         outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
 538         if (cmd == SNDRV_PCM_TRIGGER_STOP)
 539                 snd_via82xx_channel_reset(chip, viadev);
 540         return 0;
 541 }
 542
 543 /*
 544  * pointer callbacks
 545  */
 546
 547 /*
 548  * calculate the linear position at the given sg-buffer index and the rest count
 549  */
 550
 551 #define check_invalid_pos(viadev,pos) \
 552         ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 ||\
 553                                      viadev->lastpos < viadev->bufsize2))
 554
 555 static inline unsigned int calc_linear_pos(struct via82xx_modem *chip,
 556                                            struct viadev *viadev,
 557                                            unsigned int idx,
 558                                            unsigned int count)
 559 {
 560         unsigned int size, res;
 561
 562         size = viadev->idx_table[idx].size;
 563         res = viadev->idx_table[idx].offset + size - count;
 564
 565         /* check the validity of the calculated position */
 566         if (size < count) {
 567                 dev_err(chip->card->dev,
 568                         "invalid via82xx_cur_ptr (size = %d, count = %d)\n",
 569                            (int)size, (int)count);
 570                 res = viadev->lastpos;
 571         } else if (check_invalid_pos(viadev, res)) {
 572 #ifdef POINTER_DEBUG
 573                 dev_dbg(chip->card->dev,
 574                         "fail: idx = %i/%i, lastpos = 0x%x, bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, count = 0x%x\n",
 575                         idx, viadev->tbl_entries, viadev->lastpos,
 576                        viadev->bufsize2, viadev->idx_table[idx].offset,
 577                        viadev->idx_table[idx].size, count);
 578 #endif
 579                 if (count && size < count) {
 580                         dev_dbg(chip->card->dev,
 581                                 "invalid via82xx_cur_ptr, using last valid pointer\n");
 582                         res = viadev->lastpos;
 583                 } else {
 584                         if (! count)
 585                                 /* bogus count 0 on the DMA boundary? */
 586                                 res = viadev->idx_table[idx].offset;
 587                         else
 588                                 /* count register returns full size
 589                                  * when end of buffer is reached
 590                                  */
 591                                 res = viadev->idx_table[idx].offset + size;
 592                         if (check_invalid_pos(viadev, res)) {
 593                                 dev_dbg(chip->card->dev,
 594                                         "invalid via82xx_cur_ptr (2), using last valid pointer\n");
 595                                 res = viadev->lastpos;
 596                         }
 597                 }
 598         }
 599         viadev->lastpos = res; /* remember the last position */
 600         if (res >= viadev->bufsize)
 601                 res -= viadev->bufsize;
 602         return res;
 603 }
 604
 605 /*
 606  * get the current pointer on via686
 607  */
 608 static snd_pcm_uframes_t snd_via686_pcm_pointer(struct snd_pcm_substream *substream)
 609 {
 610         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 611         struct viadev *viadev = substream->runtime->private_data;
 612         unsigned int idx, ptr, count, res;
 613
 614         if (snd_BUG_ON(!viadev->tbl_entries))
 615                 return 0;
 616         if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
 617                 return 0;
 618
 619         spin_lock(&chip->reg_lock);
 620         count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
 621         /* The via686a does not have the current index register,
 622          * so we need to calculate the index from CURR_PTR.
 623          */
 624         ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
 625         if (ptr <= (unsigned int)viadev->table.addr)
 626                 idx = 0;
 627         else /* CURR_PTR holds the address + 8 */
 628                 idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) %
 629                         viadev->tbl_entries;
 630         res = calc_linear_pos(chip, viadev, idx, count);
 631         spin_unlock(&chip->reg_lock);
 632
 633         return bytes_to_frames(substream->runtime, res);
 634 }
 635
 636 /*
 637  * hw_params callback:
 638  * allocate the buffer and build up the buffer description table
 639  */
 640 static int snd_via82xx_hw_params(struct snd_pcm_substream *substream,
 641                                  struct snd_pcm_hw_params *hw_params)
 642 {
 643         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 644         struct viadev *viadev = substream->runtime->private_data;
 645         int err;
 646
 647         err = build_via_table(viadev, substream, chip->pci,
 648                               params_periods(hw_params),
 649                               params_period_bytes(hw_params));
 650         if (err < 0)
 651                 return err;
 652
 653         snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params));
 654         snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0);
 655
 656         return 0;
 657 }
 658
 659 /*
 660  * hw_free callback:
 661  * clean up the buffer description table and release the buffer
 662  */
 663 static int snd_via82xx_hw_free(struct snd_pcm_substream *substream)
 664 {
 665         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 666         struct viadev *viadev = substream->runtime->private_data;
 667
 668         clean_via_table(viadev, substream, chip->pci);
 669         return 0;
 670 }
 671
 672
 673 /*
 674  * set up the table pointer
 675  */
 676 static void snd_via82xx_set_table_ptr(struct via82xx_modem *chip, struct viadev *viadev)
 677 {
 678         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 679         outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
 680         udelay(20);
 681         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 682 }
 683
 684 /*
 685  * prepare callback for playback and capture
 686  */
 687 static int snd_via82xx_pcm_prepare(struct snd_pcm_substream *substream)
 688 {
 689         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 690         struct viadev *viadev = substream->runtime->private_data;
 691
 692         snd_via82xx_channel_reset(chip, viadev);
 693         /* this must be set after channel_reset */
 694         snd_via82xx_set_table_ptr(chip, viadev);
 695         outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG,
 696              VIADEV_REG(viadev, OFFSET_TYPE));
 697         return 0;
 698 }
 699
 700 /*
 701  * pcm hardware definition, identical for both playback and capture
 702  */
 703 static const struct snd_pcm_hardware snd_via82xx_hw =
 704 {
 705         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 706                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 707                                  SNDRV_PCM_INFO_MMAP_VALID |
 708                                  /* SNDRV_PCM_INFO_RESUME | */
 709                                  SNDRV_PCM_INFO_PAUSE),
 710         .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
 711         .rates =                SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
 712         .rate_min =             8000,
 713         .rate_max =             16000,
 714         .channels_min =         1,
 715         .channels_max =         1,
 716         .buffer_bytes_max =     128 * 1024,
 717         .period_bytes_min =     32,
 718         .period_bytes_max =     128 * 1024,
 719         .periods_min =          2,
 720         .periods_max =          VIA_TABLE_SIZE / 2,
 721         .fifo_size =            0,
 722 };
 723
 724
 725 /*
 726  * open callback skeleton
 727  */
 728 static int snd_via82xx_modem_pcm_open(struct via82xx_modem *chip, struct viadev *viadev,
 729                                       struct snd_pcm_substream *substream)
 730 {
 731         struct snd_pcm_runtime *runtime = substream->runtime;
 732         int err;
 733         static const unsigned int rates[] = { 8000,  9600, 12000, 16000 };
 734         static const struct snd_pcm_hw_constraint_list hw_constraints_rates = {
 735                 .count = ARRAY_SIZE(rates),
 736                 .list = rates,
 737                 .mask = 0,
 738         };
 739
 740         runtime->hw = snd_via82xx_hw;
 741
 742         err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 743                                          &hw_constraints_rates);
 744         if (err < 0)
 745                 return err;
 746
 747         /* we may remove following constaint when we modify table entries
 748            in interrupt */
 749         err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);
 750         if (err < 0)
 751                 return err;
 752
 753         runtime->private_data = viadev;
 754         viadev->substream = substream;
 755
 756         return 0;
 757 }
 758
 759
 760 /*
 761  * open callback for playback
 762  */
 763 static int snd_via82xx_playback_open(struct snd_pcm_substream *substream)
 764 {
 765         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 766         struct viadev *viadev = &chip->devs[chip->playback_devno + substream->number];
 767
 768         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 769 }
 770
 771 /*
 772  * open callback for capture
 773  */
 774 static int snd_via82xx_capture_open(struct snd_pcm_substream *substream)
 775 {
 776         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 777         struct viadev *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
 778
 779         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 780 }
 781
 782 /*
 783  * close callback
 784  */
 785 static int snd_via82xx_pcm_close(struct snd_pcm_substream *substream)
 786 {
 787         struct viadev *viadev = substream->runtime->private_data;
 788
 789         viadev->substream = NULL;
 790         return 0;
 791 }
 792
 793
 794 /* via686 playback callbacks */
 795 static const struct snd_pcm_ops snd_via686_playback_ops = {
 796         .open =         snd_via82xx_playback_open,
 797         .close =        snd_via82xx_pcm_close,
 798         .hw_params =    snd_via82xx_hw_params,
 799         .hw_free =      snd_via82xx_hw_free,
 800         .prepare =      snd_via82xx_pcm_prepare,
 801         .trigger =      snd_via82xx_pcm_trigger,
 802         .pointer =      snd_via686_pcm_pointer,
 803 };
 804
 805 /* via686 capture callbacks */
 806 static const struct snd_pcm_ops snd_via686_capture_ops = {
 807         .open =         snd_via82xx_capture_open,
 808         .close =        snd_via82xx_pcm_close,
 809         .hw_params =    snd_via82xx_hw_params,
 810         .hw_free =      snd_via82xx_hw_free,
 811         .prepare =      snd_via82xx_pcm_prepare,
 812         .trigger =      snd_via82xx_pcm_trigger,
 813         .pointer =      snd_via686_pcm_pointer,
 814 };
 815
 816
 817 static void init_viadev(struct via82xx_modem *chip, int idx, unsigned int reg_offset,
 818                         int direction)
 819 {
 820         chip->devs[idx].reg_offset = reg_offset;
 821         chip->devs[idx].direction = direction;
 822         chip->devs[idx].port = chip->port + reg_offset;
 823 }
 824
 825 /*
 826  * create a pcm instance for via686a/b
 827  */
 828 static int snd_via686_pcm_new(struct via82xx_modem *chip)
 829 {
 830         struct snd_pcm *pcm;
 831         int err;
 832
 833         chip->playback_devno = 0;
 834         chip->capture_devno = 1;
 835         chip->num_devs = 2;
 836         chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */
 837
 838         err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
 839         if (err < 0)
 840                 return err;
 841         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
 842         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
 843         pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
 844         pcm->private_data = chip;
 845         strcpy(pcm->name, chip->card->shortname);
 846         chip->pcms[0] = pcm;
 847         init_viadev(chip, 0, VIA_REG_MO_STATUS, 0);
 848         init_viadev(chip, 1, VIA_REG_MI_STATUS, 1);
 849
 850         snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
 851                                        &chip->pci->dev, 64*1024, 128*1024);
 852         return 0;
 853 }
 854
 855
 856 /*
 857  *  Mixer part
 858  */
 859
 860
 861 static void snd_via82xx_mixer_free_ac97_bus(struct snd_ac97_bus *bus)
 862 {
 863         struct via82xx_modem *chip = bus->private_data;
 864         chip->ac97_bus = NULL;
 865 }
 866
 867 static void snd_via82xx_mixer_free_ac97(struct snd_ac97 *ac97)
 868 {
 869         struct via82xx_modem *chip = ac97->private_data;
 870         chip->ac97 = NULL;
 871 }
 872
 873
 874 static int snd_via82xx_mixer_new(struct via82xx_modem *chip)
 875 {
 876         struct snd_ac97_template ac97;
 877         int err;
 878         static const struct snd_ac97_bus_ops ops = {
 879                 .write = snd_via82xx_codec_write,
 880                 .read = snd_via82xx_codec_read,
 881                 .wait = snd_via82xx_codec_wait,
 882         };
 883
 884         err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus);
 885         if (err < 0)
 886                 return err;
 887         chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
 888         chip->ac97_bus->clock = chip->ac97_clock;
 889
 890         memset(&ac97, 0, sizeof(ac97));
 891         ac97.private_data = chip;
 892         ac97.private_free = snd_via82xx_mixer_free_ac97;
 893         ac97.pci = chip->pci;
 894         ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;
 895         ac97.num = chip->ac97_secondary;
 896
 897         err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97);
 898         if (err < 0)
 899                 return err;
 900
 901         return 0;
 902 }
 903
 904
 905 /*
 906  * proc interface
 907  */
 908 static void snd_via82xx_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
 909 {
 910         struct via82xx_modem *chip = entry->private_data;
 911         int i;
 912
 913         snd_iprintf(buffer, "%s\n\n", chip->card->longname);
 914         for (i = 0; i < 0xa0; i += 4) {
 915                 snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
 916         }
 917 }
 918
 919 static void snd_via82xx_proc_init(struct via82xx_modem *chip)
 920 {
 921         snd_card_ro_proc_new(chip->card, "via82xx", chip,
 922                              snd_via82xx_proc_read);
 923 }
 924
 925 /*
 926  *
 927  */
 928
 929 static int snd_via82xx_chip_init(struct via82xx_modem *chip)
 930 {
 931         unsigned int val;
 932         unsigned long end_time;
 933         unsigned char pval;
 934
 935         pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval);
 936         if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) {
 937                 pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT);
 938                 udelay(100);
 939         }
 940
 941         pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 942         if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
 943                 /* deassert ACLink reset, force SYNC */
 944                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 945                                       VIA_ACLINK_CTRL_ENABLE |
 946                                       VIA_ACLINK_CTRL_RESET |
 947                                       VIA_ACLINK_CTRL_SYNC);
 948                 udelay(100);
 949 #if 1 /* FIXME: should we do full reset here for all chip models? */
 950                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
 951                 udelay(100);
 952 #else
 953                 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
 954                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 955                                       VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
 956                 udelay(2);
 957 #endif
 958                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 959                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 960                 udelay(100);
 961         }
 962
 963         pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
 964         if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
 965                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 966                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 967                 udelay(100);
 968         }
 969
 970         /* wait until codec ready */
 971         end_time = jiffies + msecs_to_jiffies(750);
 972         do {
 973                 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 974                 if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
 975                         break;
 976                 schedule_timeout_uninterruptible(1);
 977         } while (time_before(jiffies, end_time));
 978
 979         val = snd_via82xx_codec_xread(chip);
 980         if (val & VIA_REG_AC97_BUSY)
 981                 dev_err(chip->card->dev,
 982                         "AC'97 codec is not ready [0x%x]\n", val);
 983
 984         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
 985                                  VIA_REG_AC97_SECONDARY_VALID |
 986                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
 987         end_time = jiffies + msecs_to_jiffies(750);
 988         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
 989                                  VIA_REG_AC97_SECONDARY_VALID |
 990                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
 991         do {
 992                 val = snd_via82xx_codec_xread(chip);
 993                 if (val & VIA_REG_AC97_SECONDARY_VALID) {
 994                         chip->ac97_secondary = 1;
 995                         goto __ac97_ok2;
 996                 }
 997                 schedule_timeout_uninterruptible(1);
 998         } while (time_before(jiffies, end_time));
 999         /* This is ok, the most of motherboards have only one codec */
1000
1001       __ac97_ok2:
1002
1003         /* route FM trap to IRQ, disable FM trap */
1004         // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
1005         /* disable all GPI interrupts */
1006         outl(0, VIAREG(chip, GPI_INTR));
1007
1008         return 0;
1009 }
1010
1011 #ifdef CONFIG_PM_SLEEP
1012 /*
1013  * power management
1014  */
1015 static int snd_via82xx_suspend(struct device *dev)
1016 {
1017         struct snd_card *card = dev_get_drvdata(dev);
1018         struct via82xx_modem *chip = card->private_data;
1019         int i;
1020
1021         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1022         for (i = 0; i < chip->num_devs; i++)
1023                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1024         snd_ac97_suspend(chip->ac97);
1025         return 0;
1026 }
1027
1028 static int snd_via82xx_resume(struct device *dev)
1029 {
1030         struct snd_card *card = dev_get_drvdata(dev);
1031         struct via82xx_modem *chip = card->private_data;
1032         int i;
1033
1034         snd_via82xx_chip_init(chip);
1035
1036         snd_ac97_resume(chip->ac97);
1037
1038         for (i = 0; i < chip->num_devs; i++)
1039                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1040
1041         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1042         return 0;
1043 }
1044
1045 static SIMPLE_DEV_PM_OPS(snd_via82xx_pm, snd_via82xx_suspend, snd_via82xx_resume);
1046 #define SND_VIA82XX_PM_OPS      &snd_via82xx_pm
1047 #else
1048 #define SND_VIA82XX_PM_OPS      NULL
1049 #endif /* CONFIG_PM_SLEEP */
1050
1051 static void snd_via82xx_free(struct snd_card *card)
1052 {
1053         struct via82xx_modem *chip = card->private_data;
1054         unsigned int i;
1055
1056         /* disable interrupts */
1057         for (i = 0; i < chip->num_devs; i++)
1058                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1059 }
1060
1061 static int snd_via82xx_create(struct snd_card *card,
1062                               struct pci_dev *pci,
1063                               int chip_type,
1064                               int revision,
1065                               unsigned int ac97_clock)
1066 {
1067         struct via82xx_modem *chip = card->private_data;
1068         int err;
1069
1070         err = pcim_enable_device(pci);
1071         if (err < 0)
1072                 return err;
1073
1074         spin_lock_init(&chip->reg_lock);
1075         chip->card = card;
1076         chip->pci = pci;
1077         chip->irq = -1;
1078
1079         err = pci_request_regions(pci, card->driver);
1080         if (err < 0)
1081                 return err;
1082         chip->port = pci_resource_start(pci, 0);
1083         if (devm_request_irq(&pci->dev, pci->irq, snd_via82xx_interrupt,
1084                              IRQF_SHARED, KBUILD_MODNAME, chip)) {
1085                 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
1086                 return -EBUSY;
1087         }
1088         chip->irq = pci->irq;
1089         card->sync_irq = chip->irq;
1090         card->private_free = snd_via82xx_free;
1091         if (ac97_clock >= 8000 && ac97_clock <= 48000)
1092                 chip->ac97_clock = ac97_clock;
1093
1094         err = snd_via82xx_chip_init(chip);
1095         if (err < 0)
1096                 return err;
1097
1098         /* The 8233 ac97 controller does not implement the master bit
1099          * in the pci command register. IMHO this is a violation of the PCI spec.
1100          * We call pci_set_master here because it does not hurt. */
1101         pci_set_master(pci);
1102         return 0;
1103 }
1104
1105
1106 static int __snd_via82xx_probe(struct pci_dev *pci,
1107                                const struct pci_device_id *pci_id)
1108 {
1109         struct snd_card *card;
1110         struct via82xx_modem *chip;
1111         int chip_type = 0, card_type;
1112         unsigned int i;
1113         int err;
1114
1115         err = snd_devm_card_new(&pci->dev, index, id, THIS_MODULE,
1116                                 sizeof(*chip), &card);
1117         if (err < 0)
1118                 return err;
1119         chip = card->private_data;
1120
1121         card_type = pci_id->driver_data;
1122         switch (card_type) {
1123         case TYPE_CARD_VIA82XX_MODEM:
1124                 strcpy(card->driver, "VIA82XX-MODEM");
1125                 sprintf(card->shortname, "VIA 82XX modem");
1126                 break;
1127         default:
1128                 dev_err(card->dev, "invalid card type %d\n", card_type);
1129                 return -EINVAL;
1130         }
1131
1132         err = snd_via82xx_create(card, pci, chip_type, pci->revision,
1133                                  ac97_clock);
1134         if (err < 0)
1135                 return err;
1136         err = snd_via82xx_mixer_new(chip);
1137         if (err < 0)
1138                 return err;
1139
1140         err = snd_via686_pcm_new(chip);
1141         if (err < 0)
1142                 return err;
1143
1144         /* disable interrupts */
1145         for (i = 0; i < chip->num_devs; i++)
1146                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1147
1148         sprintf(card->longname, "%s at 0x%lx, irq %d",
1149                 card->shortname, chip->port, chip->irq);
1150
1151         snd_via82xx_proc_init(chip);
1152
1153         err = snd_card_register(card);
1154         if (err < 0)
1155                 return err;
1156         pci_set_drvdata(pci, card);
1157         return 0;
1158 }
1159
1160 static int snd_via82xx_probe(struct pci_dev *pci,
1161                              const struct pci_device_id *pci_id)
1162 {
1163         return snd_card_free_on_error(&pci->dev, __snd_via82xx_probe(pci, pci_id));
1164 }
1165
1166 static struct pci_driver via82xx_modem_driver = {
1167         .name = KBUILD_MODNAME,
1168         .id_table = snd_via82xx_modem_ids,
1169         .probe = snd_via82xx_probe,
1170         .driver = {
1171                 .pm = SND_VIA82XX_PM_OPS,
1172         },
1173 };
1174
1175 module_pci_driver(via82xx_modem_driver);