linux/sound/pci/via82xx_modem.c
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   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
  38MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  39MODULE_DESCRIPTION("VIA VT82xx modem");
  40MODULE_LICENSE("GPL");
  41
  42static int index = -2; /* Exclude the first card */
  43static char *id = SNDRV_DEFAULT_STR1;   /* ID for this card */
  44static int ac97_clock = 48000;
  45
  46module_param(index, int, 0444);
  47MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge.");
  48module_param(id, charp, 0444);
  49MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge.");
  50module_param(ac97_clock, int, 0444);
  51MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
  52
  53/* just for backward compatibility */
  54static bool enable;
  55module_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) \
 100enum {\
 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 */
 111DEFINE_VIA_REGSET(MO, 0x40);
 112DEFINE_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
 197struct snd_via_sg_table {
 198        unsigned int offset;
 199        unsigned int size;
 200} ;
 201
 202#define VIA_TABLE_SIZE  255
 203
 204struct 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
 219enum { TYPE_CARD_VIA82XX_MODEM = 1 };
 220
 221#define VIA_MAX_MODEM_DEVS      2
 222
 223struct 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
 248static const struct pci_device_id snd_via82xx_modem_ids[] = {
 249        { PCI_VDEVICE(VIA, 0x3068), TYPE_CARD_VIA82XX_MODEM, },
 250        { 0, }
 251};
 252
 253MODULE_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 */
 263static 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
 339static 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
 355static inline unsigned int snd_via82xx_codec_xread(struct via82xx_modem *chip)
 356{
 357        return inl(VIAREG(chip, AC97));
 358}
 359 
 360static inline void snd_via82xx_codec_xwrite(struct via82xx_modem *chip, unsigned int val)
 361{
 362        outl(val, VIAREG(chip, AC97));
 363}
 364 
 365static 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 
 381static 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 
 398static 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
 407static 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
 425static 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
 453static 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
 473static 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 */
 511static 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
 555static 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 */
 608static 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 */
 640static 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 */
 663static 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 */
 676static 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 */
 687static 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 */
 703static 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 */
 728static 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 */
 763static 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 */
 774static 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 */
 785static 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 */
 795static 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 */
 806static 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
 817static 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 */
 828static 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
 861static 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
 867static 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
 874static 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 */
 908static 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
 919static 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
 929static 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 */
1015static 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
1028static 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
1045static 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
1051static int snd_via82xx_free(struct via82xx_modem *chip)
1052{
1053        unsigned int i;
1054
1055        if (chip->irq < 0)
1056                goto __end_hw;
1057        /* disable interrupts */
1058        for (i = 0; i < chip->num_devs; i++)
1059                snd_via82xx_channel_reset(chip, &chip->devs[i]);
1060
1061      __end_hw:
1062        if (chip->irq >= 0)
1063                free_irq(chip->irq, chip);
1064        pci_release_regions(chip->pci);
1065        pci_disable_device(chip->pci);
1066        kfree(chip);
1067        return 0;
1068}
1069
1070static int snd_via82xx_dev_free(struct snd_device *device)
1071{
1072        struct via82xx_modem *chip = device->device_data;
1073        return snd_via82xx_free(chip);
1074}
1075
1076static int snd_via82xx_create(struct snd_card *card,
1077                              struct pci_dev *pci,
1078                              int chip_type,
1079                              int revision,
1080                              unsigned int ac97_clock,
1081                              struct via82xx_modem **r_via)
1082{
1083        struct via82xx_modem *chip;
1084        int err;
1085        static const struct snd_device_ops ops = {
1086                .dev_free =     snd_via82xx_dev_free,
1087        };
1088
1089        err = pci_enable_device(pci);
1090        if (err < 0)
1091                return err;
1092
1093        chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1094        if (!chip) {
1095                pci_disable_device(pci);
1096                return -ENOMEM;
1097        }
1098
1099        spin_lock_init(&chip->reg_lock);
1100        chip->card = card;
1101        chip->pci = pci;
1102        chip->irq = -1;
1103
1104        err = pci_request_regions(pci, card->driver);
1105        if (err < 0) {
1106                kfree(chip);
1107                pci_disable_device(pci);
1108                return err;
1109        }
1110        chip->port = pci_resource_start(pci, 0);
1111        if (request_irq(pci->irq, snd_via82xx_interrupt, IRQF_SHARED,
1112                        KBUILD_MODNAME, chip)) {
1113                dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
1114                snd_via82xx_free(chip);
1115                return -EBUSY;
1116        }
1117        chip->irq = pci->irq;
1118        card->sync_irq = chip->irq;
1119        if (ac97_clock >= 8000 && ac97_clock <= 48000)
1120                chip->ac97_clock = ac97_clock;
1121
1122        err = snd_via82xx_chip_init(chip);
1123        if (err < 0) {
1124                snd_via82xx_free(chip);
1125                return err;
1126        }
1127
1128        err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
1129        if (err < 0) {
1130                snd_via82xx_free(chip);
1131                return err;
1132        }
1133
1134        /* The 8233 ac97 controller does not implement the master bit
1135         * in the pci command register. IMHO this is a violation of the PCI spec.
1136         * We call pci_set_master here because it does not hurt. */
1137        pci_set_master(pci);
1138
1139        *r_via = chip;
1140        return 0;
1141}
1142
1143
1144static int snd_via82xx_probe(struct pci_dev *pci,
1145                             const struct pci_device_id *pci_id)
1146{
1147        struct snd_card *card;
1148        struct via82xx_modem *chip;
1149        int chip_type = 0, card_type;
1150        unsigned int i;
1151        int err;
1152
1153        err = snd_card_new(&pci->dev, index, id, THIS_MODULE, 0, &card);
1154        if (err < 0)
1155                return err;
1156
1157        card_type = pci_id->driver_data;
1158        switch (card_type) {
1159        case TYPE_CARD_VIA82XX_MODEM:
1160                strcpy(card->driver, "VIA82XX-MODEM");
1161                sprintf(card->shortname, "VIA 82XX modem");
1162                break;
1163        default:
1164                dev_err(card->dev, "invalid card type %d\n", card_type);
1165                err = -EINVAL;
1166                goto __error;
1167        }
1168                
1169        err = snd_via82xx_create(card, pci, chip_type, pci->revision,
1170                                 ac97_clock, &chip);
1171        if (err < 0)
1172                goto __error;
1173        card->private_data = chip;
1174        err = snd_via82xx_mixer_new(chip);
1175        if (err < 0)
1176                goto __error;
1177
1178        err = snd_via686_pcm_new(chip);
1179        if (err < 0)
1180                goto __error;
1181
1182        /* disable interrupts */
1183        for (i = 0; i < chip->num_devs; i++)
1184                snd_via82xx_channel_reset(chip, &chip->devs[i]);
1185
1186        sprintf(card->longname, "%s at 0x%lx, irq %d",
1187                card->shortname, chip->port, chip->irq);
1188
1189        snd_via82xx_proc_init(chip);
1190
1191        err = snd_card_register(card);
1192        if (err < 0) {
1193                snd_card_free(card);
1194                return err;
1195        }
1196        pci_set_drvdata(pci, card);
1197        return 0;
1198
1199 __error:
1200        snd_card_free(card);
1201        return err;
1202}
1203
1204static void snd_via82xx_remove(struct pci_dev *pci)
1205{
1206        snd_card_free(pci_get_drvdata(pci));
1207}
1208
1209static struct pci_driver via82xx_modem_driver = {
1210        .name = KBUILD_MODNAME,
1211        .id_table = snd_via82xx_modem_ids,
1212        .probe = snd_via82xx_probe,
1213        .remove = snd_via82xx_remove,
1214        .driver = {
1215                .pm = SND_VIA82XX_PM_OPS,
1216        },
1217};
1218
1219module_pci_driver(via82xx_modem_driver);
1220