linux/sound/pci/via82xx_modem.c
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   1/*
   2 *   ALSA modem driver for VIA VT82xx (South Bridge)
   3 *
   4 *   VT82C686A/B/C, VT8233A/C, VT8235
   5 *
   6 *      Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz>
   7 *                         Tjeerd.Mulder <Tjeerd.Mulder@fujitsu-siemens.com>
   8 *                    2002 Takashi Iwai <tiwai@suse.de>
   9 *
  10 *   This program is free software; you can redistribute it and/or modify
  11 *   it under the terms of the GNU General Public License as published by
  12 *   the Free Software Foundation; either version 2 of the License, or
  13 *   (at your option) any later version.
  14 *
  15 *   This program is distributed in the hope that it will be useful,
  16 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  17 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18 *   GNU General Public License for more details.
  19 *
  20 *   You should have received a copy of the GNU General Public License
  21 *   along with this program; if not, write to the Free Software
  22 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  23 *
  24 */
  25
  26/*
  27 * Changes:
  28 *
  29 * Sep. 2,  2004  Sasha Khapyorsky <sashak@alsa-project.org>
  30 *      Modified from original audio driver 'via82xx.c' to support AC97
  31 *      modems.
  32 */
  33
  34#include <linux/io.h>
  35#include <linux/delay.h>
  36#include <linux/interrupt.h>
  37#include <linux/init.h>
  38#include <linux/pci.h>
  39#include <linux/slab.h>
  40#include <linux/module.h>
  41#include <sound/core.h>
  42#include <sound/pcm.h>
  43#include <sound/pcm_params.h>
  44#include <sound/info.h>
  45#include <sound/ac97_codec.h>
  46#include <sound/initval.h>
  47
  48#if 0
  49#define POINTER_DEBUG
  50#endif
  51
  52MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  53MODULE_DESCRIPTION("VIA VT82xx modem");
  54MODULE_LICENSE("GPL");
  55MODULE_SUPPORTED_DEVICE("{{VIA,VT82C686A/B/C modem,pci}}");
  56
  57static int index = -2; /* Exclude the first card */
  58static char *id = SNDRV_DEFAULT_STR1;   /* ID for this card */
  59static int ac97_clock = 48000;
  60
  61module_param(index, int, 0444);
  62MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge.");
  63module_param(id, charp, 0444);
  64MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge.");
  65module_param(ac97_clock, int, 0444);
  66MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
  67
  68/* just for backward compatibility */
  69static bool enable;
  70module_param(enable, bool, 0444);
  71
  72
  73/*
  74 *  Direct registers
  75 */
  76
  77#define VIAREG(via, x) ((via)->port + VIA_REG_##x)
  78#define VIADEV_REG(viadev, x) ((viadev)->port + VIA_REG_##x)
  79
  80/* common offsets */
  81#define VIA_REG_OFFSET_STATUS           0x00    /* byte - channel status */
  82#define   VIA_REG_STAT_ACTIVE           0x80    /* RO */
  83#define   VIA_REG_STAT_PAUSED           0x40    /* RO */
  84#define   VIA_REG_STAT_TRIGGER_QUEUED   0x08    /* RO */
  85#define   VIA_REG_STAT_STOPPED          0x04    /* RWC */
  86#define   VIA_REG_STAT_EOL              0x02    /* RWC */
  87#define   VIA_REG_STAT_FLAG             0x01    /* RWC */
  88#define VIA_REG_OFFSET_CONTROL          0x01    /* byte - channel control */
  89#define   VIA_REG_CTRL_START            0x80    /* WO */
  90#define   VIA_REG_CTRL_TERMINATE        0x40    /* WO */
  91#define   VIA_REG_CTRL_AUTOSTART        0x20
  92#define   VIA_REG_CTRL_PAUSE            0x08    /* RW */
  93#define   VIA_REG_CTRL_INT_STOP         0x04            
  94#define   VIA_REG_CTRL_INT_EOL          0x02
  95#define   VIA_REG_CTRL_INT_FLAG         0x01
  96#define   VIA_REG_CTRL_RESET            0x01    /* RW - probably reset? undocumented */
  97#define   VIA_REG_CTRL_INT (VIA_REG_CTRL_INT_FLAG | VIA_REG_CTRL_INT_EOL | VIA_REG_CTRL_AUTOSTART)
  98#define VIA_REG_OFFSET_TYPE             0x02    /* byte - channel type (686 only) */
  99#define   VIA_REG_TYPE_AUTOSTART        0x80    /* RW - autostart at EOL */
 100#define   VIA_REG_TYPE_16BIT            0x20    /* RW */
 101#define   VIA_REG_TYPE_STEREO           0x10    /* RW */
 102#define   VIA_REG_TYPE_INT_LLINE        0x00
 103#define   VIA_REG_TYPE_INT_LSAMPLE      0x04
 104#define   VIA_REG_TYPE_INT_LESSONE      0x08
 105#define   VIA_REG_TYPE_INT_MASK         0x0c
 106#define   VIA_REG_TYPE_INT_EOL          0x02
 107#define   VIA_REG_TYPE_INT_FLAG         0x01
 108#define VIA_REG_OFFSET_TABLE_PTR        0x04    /* dword - channel table pointer */
 109#define VIA_REG_OFFSET_CURR_PTR         0x04    /* dword - channel current pointer */
 110#define VIA_REG_OFFSET_STOP_IDX         0x08    /* dword - stop index, channel type, sample rate */
 111#define VIA_REG_OFFSET_CURR_COUNT       0x0c    /* dword - channel current count (24 bit) */
 112#define VIA_REG_OFFSET_CURR_INDEX       0x0f    /* byte - channel current index (for via8233 only) */
 113
 114#define DEFINE_VIA_REGSET(name,val) \
 115enum {\
 116        VIA_REG_##name##_STATUS         = (val),\
 117        VIA_REG_##name##_CONTROL        = (val) + 0x01,\
 118        VIA_REG_##name##_TYPE           = (val) + 0x02,\
 119        VIA_REG_##name##_TABLE_PTR      = (val) + 0x04,\
 120        VIA_REG_##name##_CURR_PTR       = (val) + 0x04,\
 121        VIA_REG_##name##_STOP_IDX       = (val) + 0x08,\
 122        VIA_REG_##name##_CURR_COUNT     = (val) + 0x0c,\
 123}
 124
 125/* modem block */
 126DEFINE_VIA_REGSET(MO, 0x40);
 127DEFINE_VIA_REGSET(MI, 0x50);
 128
 129/* AC'97 */
 130#define VIA_REG_AC97                    0x80    /* dword */
 131#define   VIA_REG_AC97_CODEC_ID_MASK    (3<<30)
 132#define   VIA_REG_AC97_CODEC_ID_SHIFT   30
 133#define   VIA_REG_AC97_CODEC_ID_PRIMARY 0x00
 134#define   VIA_REG_AC97_CODEC_ID_SECONDARY 0x01
 135#define   VIA_REG_AC97_SECONDARY_VALID  (1<<27)
 136#define   VIA_REG_AC97_PRIMARY_VALID    (1<<25)
 137#define   VIA_REG_AC97_BUSY             (1<<24)
 138#define   VIA_REG_AC97_READ             (1<<23)
 139#define   VIA_REG_AC97_CMD_SHIFT        16
 140#define   VIA_REG_AC97_CMD_MASK         0x7e
 141#define   VIA_REG_AC97_DATA_SHIFT       0
 142#define   VIA_REG_AC97_DATA_MASK        0xffff
 143
 144#define VIA_REG_SGD_SHADOW              0x84    /* dword */
 145#define   VIA_REG_SGD_STAT_PB_FLAG      (1<<0)
 146#define   VIA_REG_SGD_STAT_CP_FLAG      (1<<1)
 147#define   VIA_REG_SGD_STAT_FM_FLAG      (1<<2)
 148#define   VIA_REG_SGD_STAT_PB_EOL       (1<<4)
 149#define   VIA_REG_SGD_STAT_CP_EOL       (1<<5)
 150#define   VIA_REG_SGD_STAT_FM_EOL       (1<<6)
 151#define   VIA_REG_SGD_STAT_PB_STOP      (1<<8)
 152#define   VIA_REG_SGD_STAT_CP_STOP      (1<<9)
 153#define   VIA_REG_SGD_STAT_FM_STOP      (1<<10)
 154#define   VIA_REG_SGD_STAT_PB_ACTIVE    (1<<12)
 155#define   VIA_REG_SGD_STAT_CP_ACTIVE    (1<<13)
 156#define   VIA_REG_SGD_STAT_FM_ACTIVE    (1<<14)
 157#define   VIA_REG_SGD_STAT_MR_FLAG      (1<<16)
 158#define   VIA_REG_SGD_STAT_MW_FLAG      (1<<17)
 159#define   VIA_REG_SGD_STAT_MR_EOL       (1<<20)
 160#define   VIA_REG_SGD_STAT_MW_EOL       (1<<21)
 161#define   VIA_REG_SGD_STAT_MR_STOP      (1<<24)
 162#define   VIA_REG_SGD_STAT_MW_STOP      (1<<25)
 163#define   VIA_REG_SGD_STAT_MR_ACTIVE    (1<<28)
 164#define   VIA_REG_SGD_STAT_MW_ACTIVE    (1<<29)
 165
 166#define VIA_REG_GPI_STATUS              0x88
 167#define VIA_REG_GPI_INTR                0x8c
 168
 169#define VIA_TBL_BIT_FLAG        0x40000000
 170#define VIA_TBL_BIT_EOL         0x80000000
 171
 172/* pci space */
 173#define VIA_ACLINK_STAT         0x40
 174#define  VIA_ACLINK_C11_READY   0x20
 175#define  VIA_ACLINK_C10_READY   0x10
 176#define  VIA_ACLINK_C01_READY   0x04 /* secondary codec ready */
 177#define  VIA_ACLINK_LOWPOWER    0x02 /* low-power state */
 178#define  VIA_ACLINK_C00_READY   0x01 /* primary codec ready */
 179#define VIA_ACLINK_CTRL         0x41
 180#define  VIA_ACLINK_CTRL_ENABLE 0x80 /* 0: disable, 1: enable */
 181#define  VIA_ACLINK_CTRL_RESET  0x40 /* 0: assert, 1: de-assert */
 182#define  VIA_ACLINK_CTRL_SYNC   0x20 /* 0: release SYNC, 1: force SYNC hi */
 183#define  VIA_ACLINK_CTRL_SDO    0x10 /* 0: release SDO, 1: force SDO hi */
 184#define  VIA_ACLINK_CTRL_VRA    0x08 /* 0: disable VRA, 1: enable VRA */
 185#define  VIA_ACLINK_CTRL_PCM    0x04 /* 0: disable PCM, 1: enable PCM */
 186#define  VIA_ACLINK_CTRL_FM     0x02 /* via686 only */
 187#define  VIA_ACLINK_CTRL_SB     0x01 /* via686 only */
 188#define  VIA_ACLINK_CTRL_INIT   (VIA_ACLINK_CTRL_ENABLE|\
 189                                 VIA_ACLINK_CTRL_RESET|\
 190                                 VIA_ACLINK_CTRL_PCM)
 191#define VIA_FUNC_ENABLE         0x42
 192#define  VIA_FUNC_MIDI_PNP      0x80 /* FIXME: it's 0x40 in the datasheet! */
 193#define  VIA_FUNC_MIDI_IRQMASK  0x40 /* FIXME: not documented! */
 194#define  VIA_FUNC_RX2C_WRITE    0x20
 195#define  VIA_FUNC_SB_FIFO_EMPTY 0x10
 196#define  VIA_FUNC_ENABLE_GAME   0x08
 197#define  VIA_FUNC_ENABLE_FM     0x04
 198#define  VIA_FUNC_ENABLE_MIDI   0x02
 199#define  VIA_FUNC_ENABLE_SB     0x01
 200#define VIA_PNP_CONTROL         0x43
 201#define VIA_MC97_CTRL           0x44
 202#define  VIA_MC97_CTRL_ENABLE   0x80
 203#define  VIA_MC97_CTRL_SECONDARY 0x40
 204#define  VIA_MC97_CTRL_INIT     (VIA_MC97_CTRL_ENABLE|\
 205                                 VIA_MC97_CTRL_SECONDARY)
 206
 207
 208/*
 209 * pcm stream
 210 */
 211
 212struct snd_via_sg_table {
 213        unsigned int offset;
 214        unsigned int size;
 215} ;
 216
 217#define VIA_TABLE_SIZE  255
 218
 219struct viadev {
 220        unsigned int reg_offset;
 221        unsigned long port;
 222        int direction;  /* playback = 0, capture = 1 */
 223        struct snd_pcm_substream *substream;
 224        int running;
 225        unsigned int tbl_entries; /* # descriptors */
 226        struct snd_dma_buffer table;
 227        struct snd_via_sg_table *idx_table;
 228        /* for recovery from the unexpected pointer */
 229        unsigned int lastpos;
 230        unsigned int bufsize;
 231        unsigned int bufsize2;
 232};
 233
 234enum { TYPE_CARD_VIA82XX_MODEM = 1 };
 235
 236#define VIA_MAX_MODEM_DEVS      2
 237
 238struct via82xx_modem {
 239        int irq;
 240
 241        unsigned long port;
 242
 243        unsigned int intr_mask; /* SGD_SHADOW mask to check interrupts */
 244
 245        struct pci_dev *pci;
 246        struct snd_card *card;
 247
 248        unsigned int num_devs;
 249        unsigned int playback_devno, capture_devno;
 250        struct viadev devs[VIA_MAX_MODEM_DEVS];
 251
 252        struct snd_pcm *pcms[2];
 253
 254        struct snd_ac97_bus *ac97_bus;
 255        struct snd_ac97 *ac97;
 256        unsigned int ac97_clock;
 257        unsigned int ac97_secondary;    /* secondary AC'97 codec is present */
 258
 259        spinlock_t reg_lock;
 260        struct snd_info_entry *proc_entry;
 261};
 262
 263static const struct pci_device_id snd_via82xx_modem_ids[] = {
 264        { PCI_VDEVICE(VIA, 0x3068), TYPE_CARD_VIA82XX_MODEM, },
 265        { 0, }
 266};
 267
 268MODULE_DEVICE_TABLE(pci, snd_via82xx_modem_ids);
 269
 270/*
 271 */
 272
 273/*
 274 * allocate and initialize the descriptor buffers
 275 * periods = number of periods
 276 * fragsize = period size in bytes
 277 */
 278static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
 279                           struct pci_dev *pci,
 280                           unsigned int periods, unsigned int fragsize)
 281{
 282        unsigned int i, idx, ofs, rest;
 283        struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 284
 285        if (dev->table.area == NULL) {
 286                /* the start of each lists must be aligned to 8 bytes,
 287                 * but the kernel pages are much bigger, so we don't care
 288                 */
 289                if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
 290                                        PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8),
 291                                        &dev->table) < 0)
 292                        return -ENOMEM;
 293        }
 294        if (! dev->idx_table) {
 295                dev->idx_table = kmalloc(sizeof(*dev->idx_table) * VIA_TABLE_SIZE, GFP_KERNEL);
 296                if (! dev->idx_table)
 297                        return -ENOMEM;
 298        }
 299
 300        /* fill the entries */
 301        idx = 0;
 302        ofs = 0;
 303        for (i = 0; i < periods; i++) {
 304                rest = fragsize;
 305                /* fill descriptors for a period.
 306                 * a period can be split to several descriptors if it's
 307                 * over page boundary.
 308                 */
 309                do {
 310                        unsigned int r;
 311                        unsigned int flag;
 312                        unsigned int addr;
 313
 314                        if (idx >= VIA_TABLE_SIZE) {
 315                                dev_err(&pci->dev, "too much table size!\n");
 316                                return -EINVAL;
 317                        }
 318                        addr = snd_pcm_sgbuf_get_addr(substream, ofs);
 319                        ((u32 *)dev->table.area)[idx << 1] = cpu_to_le32(addr);
 320                        r = PAGE_SIZE - (ofs % PAGE_SIZE);
 321                        if (rest < r)
 322                                r = rest;
 323                        rest -= r;
 324                        if (! rest) {
 325                                if (i == periods - 1)
 326                                        flag = VIA_TBL_BIT_EOL; /* buffer boundary */
 327                                else
 328                                        flag = VIA_TBL_BIT_FLAG; /* period boundary */
 329                        } else
 330                                flag = 0; /* period continues to the next */
 331                        /*
 332                        dev_dbg(&pci->dev,
 333                                "tbl %d: at %d  size %d (rest %d)\n",
 334                                idx, ofs, r, rest);
 335                        */
 336                        ((u32 *)dev->table.area)[(idx<<1) + 1] = cpu_to_le32(r | flag);
 337                        dev->idx_table[idx].offset = ofs;
 338                        dev->idx_table[idx].size = r;
 339                        ofs += r;
 340                        idx++;
 341                } while (rest > 0);
 342        }
 343        dev->tbl_entries = idx;
 344        dev->bufsize = periods * fragsize;
 345        dev->bufsize2 = dev->bufsize / 2;
 346        return 0;
 347}
 348
 349
 350static int clean_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
 351                           struct pci_dev *pci)
 352{
 353        if (dev->table.area) {
 354                snd_dma_free_pages(&dev->table);
 355                dev->table.area = NULL;
 356        }
 357        kfree(dev->idx_table);
 358        dev->idx_table = NULL;
 359        return 0;
 360}
 361
 362/*
 363 *  Basic I/O
 364 */
 365
 366static inline unsigned int snd_via82xx_codec_xread(struct via82xx_modem *chip)
 367{
 368        return inl(VIAREG(chip, AC97));
 369}
 370 
 371static inline void snd_via82xx_codec_xwrite(struct via82xx_modem *chip, unsigned int val)
 372{
 373        outl(val, VIAREG(chip, AC97));
 374}
 375 
 376static int snd_via82xx_codec_ready(struct via82xx_modem *chip, int secondary)
 377{
 378        unsigned int timeout = 1000;    /* 1ms */
 379        unsigned int val;
 380        
 381        while (timeout-- > 0) {
 382                udelay(1);
 383                if (!((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY))
 384                        return val & 0xffff;
 385        }
 386        dev_err(chip->card->dev, "codec_ready: codec %i is not ready [0x%x]\n",
 387                   secondary, snd_via82xx_codec_xread(chip));
 388        return -EIO;
 389}
 390 
 391static int snd_via82xx_codec_valid(struct via82xx_modem *chip, int secondary)
 392{
 393        unsigned int timeout = 1000;    /* 1ms */
 394        unsigned int val, val1;
 395        unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
 396                                         VIA_REG_AC97_SECONDARY_VALID;
 397        
 398        while (timeout-- > 0) {
 399                val = snd_via82xx_codec_xread(chip);
 400                val1 = val & (VIA_REG_AC97_BUSY | stat);
 401                if (val1 == stat)
 402                        return val & 0xffff;
 403                udelay(1);
 404        }
 405        return -EIO;
 406}
 407 
 408static void snd_via82xx_codec_wait(struct snd_ac97 *ac97)
 409{
 410        struct via82xx_modem *chip = ac97->private_data;
 411        int err;
 412        err = snd_via82xx_codec_ready(chip, ac97->num);
 413        /* here we need to wait fairly for long time.. */
 414        msleep(500);
 415}
 416
 417static void snd_via82xx_codec_write(struct snd_ac97 *ac97,
 418                                    unsigned short reg,
 419                                    unsigned short val)
 420{
 421        struct via82xx_modem *chip = ac97->private_data;
 422        unsigned int xval;
 423        if(reg == AC97_GPIO_STATUS) {
 424                outl(val, VIAREG(chip, GPI_STATUS));
 425                return;
 426        }       
 427        xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
 428        xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
 429        xval |= reg << VIA_REG_AC97_CMD_SHIFT;
 430        xval |= val << VIA_REG_AC97_DATA_SHIFT;
 431        snd_via82xx_codec_xwrite(chip, xval);
 432        snd_via82xx_codec_ready(chip, ac97->num);
 433}
 434
 435static unsigned short snd_via82xx_codec_read(struct snd_ac97 *ac97, unsigned short reg)
 436{
 437        struct via82xx_modem *chip = ac97->private_data;
 438        unsigned int xval, val = 0xffff;
 439        int again = 0;
 440
 441        xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
 442        xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
 443        xval |= VIA_REG_AC97_READ;
 444        xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
 445        while (1) {
 446                if (again++ > 3) {
 447                        dev_err(chip->card->dev,
 448                                "codec_read: codec %i is not valid [0x%x]\n",
 449                                   ac97->num, snd_via82xx_codec_xread(chip));
 450                        return 0xffff;
 451                }
 452                snd_via82xx_codec_xwrite(chip, xval);
 453                udelay (20);
 454                if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) {
 455                        udelay(25);
 456                        val = snd_via82xx_codec_xread(chip);
 457                        break;
 458                }
 459        }
 460        return val & 0xffff;
 461}
 462
 463static void snd_via82xx_channel_reset(struct via82xx_modem *chip, struct viadev *viadev)
 464{
 465        outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET,
 466             VIADEV_REG(viadev, OFFSET_CONTROL));
 467        inb(VIADEV_REG(viadev, OFFSET_CONTROL));
 468        udelay(50);
 469        /* disable interrupts */
 470        outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL));
 471        /* clear interrupts */
 472        outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS));
 473        outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */
 474        // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
 475        viadev->lastpos = 0;
 476}
 477
 478
 479/*
 480 *  Interrupt handler
 481 */
 482
 483static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id)
 484{
 485        struct via82xx_modem *chip = dev_id;
 486        unsigned int status;
 487        unsigned int i;
 488
 489        status = inl(VIAREG(chip, SGD_SHADOW));
 490        if (! (status & chip->intr_mask)) {
 491                return IRQ_NONE;
 492        }
 493// _skip_sgd:
 494
 495        /* check status for each stream */
 496        spin_lock(&chip->reg_lock);
 497        for (i = 0; i < chip->num_devs; i++) {
 498                struct viadev *viadev = &chip->devs[i];
 499                unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
 500                c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED);
 501                if (! c_status)
 502                        continue;
 503                if (viadev->substream && viadev->running) {
 504                        spin_unlock(&chip->reg_lock);
 505                        snd_pcm_period_elapsed(viadev->substream);
 506                        spin_lock(&chip->reg_lock);
 507                }
 508                outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
 509        }
 510        spin_unlock(&chip->reg_lock);
 511        return IRQ_HANDLED;
 512}
 513
 514/*
 515 *  PCM callbacks
 516 */
 517
 518/*
 519 * trigger callback
 520 */
 521static int snd_via82xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 522{
 523        struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 524        struct viadev *viadev = substream->runtime->private_data;
 525        unsigned char val = 0;
 526
 527        switch (cmd) {
 528        case SNDRV_PCM_TRIGGER_START:
 529        case SNDRV_PCM_TRIGGER_SUSPEND:
 530                val |= VIA_REG_CTRL_START;
 531                viadev->running = 1;
 532                break;
 533        case SNDRV_PCM_TRIGGER_STOP:
 534                val = VIA_REG_CTRL_TERMINATE;
 535                viadev->running = 0;
 536                break;
 537        case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 538                val |= VIA_REG_CTRL_PAUSE;
 539                viadev->running = 0;
 540                break;
 541        case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 542                viadev->running = 1;
 543                break;
 544        default:
 545                return -EINVAL;
 546        }
 547        outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
 548        if (cmd == SNDRV_PCM_TRIGGER_STOP)
 549                snd_via82xx_channel_reset(chip, viadev);
 550        return 0;
 551}
 552
 553/*
 554 * pointer callbacks
 555 */
 556
 557/*
 558 * calculate the linear position at the given sg-buffer index and the rest count
 559 */
 560
 561#define check_invalid_pos(viadev,pos) \
 562        ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 ||\
 563                                     viadev->lastpos < viadev->bufsize2))
 564
 565static inline unsigned int calc_linear_pos(struct via82xx_modem *chip,
 566                                           struct viadev *viadev,
 567                                           unsigned int idx,
 568                                           unsigned int count)
 569{
 570        unsigned int size, res;
 571
 572        size = viadev->idx_table[idx].size;
 573        res = viadev->idx_table[idx].offset + size - count;
 574
 575        /* check the validity of the calculated position */
 576        if (size < count) {
 577                dev_err(chip->card->dev,
 578                        "invalid via82xx_cur_ptr (size = %d, count = %d)\n",
 579                           (int)size, (int)count);
 580                res = viadev->lastpos;
 581        } else if (check_invalid_pos(viadev, res)) {
 582#ifdef POINTER_DEBUG
 583                dev_dbg(chip->card->dev,
 584                        "fail: idx = %i/%i, lastpos = 0x%x, bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, count = 0x%x\n",
 585                        idx, viadev->tbl_entries, viadev->lastpos,
 586                       viadev->bufsize2, viadev->idx_table[idx].offset,
 587                       viadev->idx_table[idx].size, count);
 588#endif
 589                if (count && size < count) {
 590                        dev_dbg(chip->card->dev,
 591                                "invalid via82xx_cur_ptr, using last valid pointer\n");
 592                        res = viadev->lastpos;
 593                } else {
 594                        if (! count)
 595                                /* bogus count 0 on the DMA boundary? */
 596                                res = viadev->idx_table[idx].offset;
 597                        else
 598                                /* count register returns full size
 599                                 * when end of buffer is reached
 600                                 */
 601                                res = viadev->idx_table[idx].offset + size;
 602                        if (check_invalid_pos(viadev, res)) {
 603                                dev_dbg(chip->card->dev,
 604                                        "invalid via82xx_cur_ptr (2), using last valid pointer\n");
 605                                res = viadev->lastpos;
 606                        }
 607                }
 608        }
 609        viadev->lastpos = res; /* remember the last position */
 610        if (res >= viadev->bufsize)
 611                res -= viadev->bufsize;
 612        return res;
 613}
 614
 615/*
 616 * get the current pointer on via686
 617 */
 618static snd_pcm_uframes_t snd_via686_pcm_pointer(struct snd_pcm_substream *substream)
 619{
 620        struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 621        struct viadev *viadev = substream->runtime->private_data;
 622        unsigned int idx, ptr, count, res;
 623
 624        if (snd_BUG_ON(!viadev->tbl_entries))
 625                return 0;
 626        if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
 627                return 0;
 628
 629        spin_lock(&chip->reg_lock);
 630        count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
 631        /* The via686a does not have the current index register,
 632         * so we need to calculate the index from CURR_PTR.
 633         */
 634        ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
 635        if (ptr <= (unsigned int)viadev->table.addr)
 636                idx = 0;
 637        else /* CURR_PTR holds the address + 8 */
 638                idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) %
 639                        viadev->tbl_entries;
 640        res = calc_linear_pos(chip, viadev, idx, count);
 641        spin_unlock(&chip->reg_lock);
 642
 643        return bytes_to_frames(substream->runtime, res);
 644}
 645
 646/*
 647 * hw_params callback:
 648 * allocate the buffer and build up the buffer description table
 649 */
 650static int snd_via82xx_hw_params(struct snd_pcm_substream *substream,
 651                                 struct snd_pcm_hw_params *hw_params)
 652{
 653        struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 654        struct viadev *viadev = substream->runtime->private_data;
 655        int err;
 656
 657        err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 658        if (err < 0)
 659                return err;
 660        err = build_via_table(viadev, substream, chip->pci,
 661                              params_periods(hw_params),
 662                              params_period_bytes(hw_params));
 663        if (err < 0)
 664                return err;
 665
 666        snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params));
 667        snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0);
 668
 669        return 0;
 670}
 671
 672/*
 673 * hw_free callback:
 674 * clean up the buffer description table and release the buffer
 675 */
 676static int snd_via82xx_hw_free(struct snd_pcm_substream *substream)
 677{
 678        struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 679        struct viadev *viadev = substream->runtime->private_data;
 680
 681        clean_via_table(viadev, substream, chip->pci);
 682        snd_pcm_lib_free_pages(substream);
 683        return 0;
 684}
 685
 686
 687/*
 688 * set up the table pointer
 689 */
 690static void snd_via82xx_set_table_ptr(struct via82xx_modem *chip, struct viadev *viadev)
 691{
 692        snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 693        outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
 694        udelay(20);
 695        snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 696}
 697
 698/*
 699 * prepare callback for playback and capture
 700 */
 701static int snd_via82xx_pcm_prepare(struct snd_pcm_substream *substream)
 702{
 703        struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 704        struct viadev *viadev = substream->runtime->private_data;
 705
 706        snd_via82xx_channel_reset(chip, viadev);
 707        /* this must be set after channel_reset */
 708        snd_via82xx_set_table_ptr(chip, viadev);
 709        outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG,
 710             VIADEV_REG(viadev, OFFSET_TYPE));
 711        return 0;
 712}
 713
 714/*
 715 * pcm hardware definition, identical for both playback and capture
 716 */
 717static struct snd_pcm_hardware snd_via82xx_hw =
 718{
 719        .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 720                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
 721                                 SNDRV_PCM_INFO_MMAP_VALID |
 722                                 /* SNDRV_PCM_INFO_RESUME | */
 723                                 SNDRV_PCM_INFO_PAUSE),
 724        .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
 725        .rates =                SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
 726        .rate_min =             8000,
 727        .rate_max =             16000,
 728        .channels_min =         1,
 729        .channels_max =         1,
 730        .buffer_bytes_max =     128 * 1024,
 731        .period_bytes_min =     32,
 732        .period_bytes_max =     128 * 1024,
 733        .periods_min =          2,
 734        .periods_max =          VIA_TABLE_SIZE / 2,
 735        .fifo_size =            0,
 736};
 737
 738
 739/*
 740 * open callback skeleton
 741 */
 742static int snd_via82xx_modem_pcm_open(struct via82xx_modem *chip, struct viadev *viadev,
 743                                      struct snd_pcm_substream *substream)
 744{
 745        struct snd_pcm_runtime *runtime = substream->runtime;
 746        int err;
 747        static const unsigned int rates[] = { 8000,  9600, 12000, 16000 };
 748        static const struct snd_pcm_hw_constraint_list hw_constraints_rates = {
 749                .count = ARRAY_SIZE(rates),
 750                .list = rates,
 751                .mask = 0,
 752        };
 753
 754        runtime->hw = snd_via82xx_hw;
 755        
 756        if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 757                                              &hw_constraints_rates)) < 0)
 758                return err;
 759
 760        /* we may remove following constaint when we modify table entries
 761           in interrupt */
 762        if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 763                return err;
 764
 765        runtime->private_data = viadev;
 766        viadev->substream = substream;
 767
 768        return 0;
 769}
 770
 771
 772/*
 773 * open callback for playback
 774 */
 775static int snd_via82xx_playback_open(struct snd_pcm_substream *substream)
 776{
 777        struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 778        struct viadev *viadev = &chip->devs[chip->playback_devno + substream->number];
 779
 780        return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 781}
 782
 783/*
 784 * open callback for capture
 785 */
 786static int snd_via82xx_capture_open(struct snd_pcm_substream *substream)
 787{
 788        struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 789        struct viadev *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
 790
 791        return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 792}
 793
 794/*
 795 * close callback
 796 */
 797static int snd_via82xx_pcm_close(struct snd_pcm_substream *substream)
 798{
 799        struct viadev *viadev = substream->runtime->private_data;
 800
 801        viadev->substream = NULL;
 802        return 0;
 803}
 804
 805
 806/* via686 playback callbacks */
 807static const struct snd_pcm_ops snd_via686_playback_ops = {
 808        .open =         snd_via82xx_playback_open,
 809        .close =        snd_via82xx_pcm_close,
 810        .ioctl =        snd_pcm_lib_ioctl,
 811        .hw_params =    snd_via82xx_hw_params,
 812        .hw_free =      snd_via82xx_hw_free,
 813        .prepare =      snd_via82xx_pcm_prepare,
 814        .trigger =      snd_via82xx_pcm_trigger,
 815        .pointer =      snd_via686_pcm_pointer,
 816        .page =         snd_pcm_sgbuf_ops_page,
 817};
 818
 819/* via686 capture callbacks */
 820static const struct snd_pcm_ops snd_via686_capture_ops = {
 821        .open =         snd_via82xx_capture_open,
 822        .close =        snd_via82xx_pcm_close,
 823        .ioctl =        snd_pcm_lib_ioctl,
 824        .hw_params =    snd_via82xx_hw_params,
 825        .hw_free =      snd_via82xx_hw_free,
 826        .prepare =      snd_via82xx_pcm_prepare,
 827        .trigger =      snd_via82xx_pcm_trigger,
 828        .pointer =      snd_via686_pcm_pointer,
 829        .page =         snd_pcm_sgbuf_ops_page,
 830};
 831
 832
 833static void init_viadev(struct via82xx_modem *chip, int idx, unsigned int reg_offset,
 834                        int direction)
 835{
 836        chip->devs[idx].reg_offset = reg_offset;
 837        chip->devs[idx].direction = direction;
 838        chip->devs[idx].port = chip->port + reg_offset;
 839}
 840
 841/*
 842 * create a pcm instance for via686a/b
 843 */
 844static int snd_via686_pcm_new(struct via82xx_modem *chip)
 845{
 846        struct snd_pcm *pcm;
 847        int err;
 848
 849        chip->playback_devno = 0;
 850        chip->capture_devno = 1;
 851        chip->num_devs = 2;
 852        chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */
 853
 854        err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
 855        if (err < 0)
 856                return err;
 857        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
 858        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
 859        pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
 860        pcm->private_data = chip;
 861        strcpy(pcm->name, chip->card->shortname);
 862        chip->pcms[0] = pcm;
 863        init_viadev(chip, 0, VIA_REG_MO_STATUS, 0);
 864        init_viadev(chip, 1, VIA_REG_MI_STATUS, 1);
 865
 866        if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
 867                                                         snd_dma_pci_data(chip->pci),
 868                                                         64*1024, 128*1024)) < 0)
 869                return err;
 870
 871        return 0;
 872}
 873
 874
 875/*
 876 *  Mixer part
 877 */
 878
 879
 880static void snd_via82xx_mixer_free_ac97_bus(struct snd_ac97_bus *bus)
 881{
 882        struct via82xx_modem *chip = bus->private_data;
 883        chip->ac97_bus = NULL;
 884}
 885
 886static void snd_via82xx_mixer_free_ac97(struct snd_ac97 *ac97)
 887{
 888        struct via82xx_modem *chip = ac97->private_data;
 889        chip->ac97 = NULL;
 890}
 891
 892
 893static int snd_via82xx_mixer_new(struct via82xx_modem *chip)
 894{
 895        struct snd_ac97_template ac97;
 896        int err;
 897        static struct snd_ac97_bus_ops ops = {
 898                .write = snd_via82xx_codec_write,
 899                .read = snd_via82xx_codec_read,
 900                .wait = snd_via82xx_codec_wait,
 901        };
 902
 903        if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
 904                return err;
 905        chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
 906        chip->ac97_bus->clock = chip->ac97_clock;
 907
 908        memset(&ac97, 0, sizeof(ac97));
 909        ac97.private_data = chip;
 910        ac97.private_free = snd_via82xx_mixer_free_ac97;
 911        ac97.pci = chip->pci;
 912        ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;
 913        ac97.num = chip->ac97_secondary;
 914
 915        if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
 916                return err;
 917
 918        return 0;
 919}
 920
 921
 922/*
 923 * proc interface
 924 */
 925static void snd_via82xx_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
 926{
 927        struct via82xx_modem *chip = entry->private_data;
 928        int i;
 929        
 930        snd_iprintf(buffer, "%s\n\n", chip->card->longname);
 931        for (i = 0; i < 0xa0; i += 4) {
 932                snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
 933        }
 934}
 935
 936static void snd_via82xx_proc_init(struct via82xx_modem *chip)
 937{
 938        struct snd_info_entry *entry;
 939
 940        if (! snd_card_proc_new(chip->card, "via82xx", &entry))
 941                snd_info_set_text_ops(entry, chip, snd_via82xx_proc_read);
 942}
 943
 944/*
 945 *
 946 */
 947
 948static int snd_via82xx_chip_init(struct via82xx_modem *chip)
 949{
 950        unsigned int val;
 951        unsigned long end_time;
 952        unsigned char pval;
 953
 954        pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval);
 955        if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) {
 956                pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT);
 957                udelay(100);
 958        }
 959
 960        pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 961        if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
 962                /* deassert ACLink reset, force SYNC */
 963                pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 964                                      VIA_ACLINK_CTRL_ENABLE |
 965                                      VIA_ACLINK_CTRL_RESET |
 966                                      VIA_ACLINK_CTRL_SYNC);
 967                udelay(100);
 968#if 1 /* FIXME: should we do full reset here for all chip models? */
 969                pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
 970                udelay(100);
 971#else
 972                /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
 973                pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 974                                      VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
 975                udelay(2);
 976#endif
 977                /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 978                pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 979                udelay(100);
 980        }
 981        
 982        pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
 983        if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
 984                /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 985                pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 986                udelay(100);
 987        }
 988
 989        /* wait until codec ready */
 990        end_time = jiffies + msecs_to_jiffies(750);
 991        do {
 992                pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 993                if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
 994                        break;
 995                schedule_timeout_uninterruptible(1);
 996        } while (time_before(jiffies, end_time));
 997
 998        if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)
 999                dev_err(chip->card->dev,
1000                        "AC'97 codec is not ready [0x%x]\n", val);
1001
1002        snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
1003                                 VIA_REG_AC97_SECONDARY_VALID |
1004                                 (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
1005        end_time = jiffies + msecs_to_jiffies(750);
1006        snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
1007                                 VIA_REG_AC97_SECONDARY_VALID |
1008                                 (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
1009        do {
1010                if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) {
1011                        chip->ac97_secondary = 1;
1012                        goto __ac97_ok2;
1013                }
1014                schedule_timeout_uninterruptible(1);
1015        } while (time_before(jiffies, end_time));
1016        /* This is ok, the most of motherboards have only one codec */
1017
1018      __ac97_ok2:
1019
1020        /* route FM trap to IRQ, disable FM trap */
1021        // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
1022        /* disable all GPI interrupts */
1023        outl(0, VIAREG(chip, GPI_INTR));
1024
1025        return 0;
1026}
1027
1028#ifdef CONFIG_PM_SLEEP
1029/*
1030 * power management
1031 */
1032static int snd_via82xx_suspend(struct device *dev)
1033{
1034        struct snd_card *card = dev_get_drvdata(dev);
1035        struct via82xx_modem *chip = card->private_data;
1036        int i;
1037
1038        snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1039        for (i = 0; i < 2; i++)
1040                snd_pcm_suspend_all(chip->pcms[i]);
1041        for (i = 0; i < chip->num_devs; i++)
1042                snd_via82xx_channel_reset(chip, &chip->devs[i]);
1043        synchronize_irq(chip->irq);
1044        snd_ac97_suspend(chip->ac97);
1045        return 0;
1046}
1047
1048static int snd_via82xx_resume(struct device *dev)
1049{
1050        struct snd_card *card = dev_get_drvdata(dev);
1051        struct via82xx_modem *chip = card->private_data;
1052        int i;
1053
1054        snd_via82xx_chip_init(chip);
1055
1056        snd_ac97_resume(chip->ac97);
1057
1058        for (i = 0; i < chip->num_devs; i++)
1059                snd_via82xx_channel_reset(chip, &chip->devs[i]);
1060
1061        snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1062        return 0;
1063}
1064
1065static SIMPLE_DEV_PM_OPS(snd_via82xx_pm, snd_via82xx_suspend, snd_via82xx_resume);
1066#define SND_VIA82XX_PM_OPS      &snd_via82xx_pm
1067#else
1068#define SND_VIA82XX_PM_OPS      NULL
1069#endif /* CONFIG_PM_SLEEP */
1070
1071static int snd_via82xx_free(struct via82xx_modem *chip)
1072{
1073        unsigned int i;
1074
1075        if (chip->irq < 0)
1076                goto __end_hw;
1077        /* disable interrupts */
1078        for (i = 0; i < chip->num_devs; i++)
1079                snd_via82xx_channel_reset(chip, &chip->devs[i]);
1080
1081      __end_hw:
1082        if (chip->irq >= 0)
1083                free_irq(chip->irq, chip);
1084        pci_release_regions(chip->pci);
1085        pci_disable_device(chip->pci);
1086        kfree(chip);
1087        return 0;
1088}
1089
1090static int snd_via82xx_dev_free(struct snd_device *device)
1091{
1092        struct via82xx_modem *chip = device->device_data;
1093        return snd_via82xx_free(chip);
1094}
1095
1096static int snd_via82xx_create(struct snd_card *card,
1097                              struct pci_dev *pci,
1098                              int chip_type,
1099                              int revision,
1100                              unsigned int ac97_clock,
1101                              struct via82xx_modem **r_via)
1102{
1103        struct via82xx_modem *chip;
1104        int err;
1105        static struct snd_device_ops ops = {
1106                .dev_free =     snd_via82xx_dev_free,
1107        };
1108
1109        if ((err = pci_enable_device(pci)) < 0)
1110                return err;
1111
1112        if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) {
1113                pci_disable_device(pci);
1114                return -ENOMEM;
1115        }
1116
1117        spin_lock_init(&chip->reg_lock);
1118        chip->card = card;
1119        chip->pci = pci;
1120        chip->irq = -1;
1121
1122        if ((err = pci_request_regions(pci, card->driver)) < 0) {
1123                kfree(chip);
1124                pci_disable_device(pci);
1125                return err;
1126        }
1127        chip->port = pci_resource_start(pci, 0);
1128        if (request_irq(pci->irq, snd_via82xx_interrupt, IRQF_SHARED,
1129                        KBUILD_MODNAME, chip)) {
1130                dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
1131                snd_via82xx_free(chip);
1132                return -EBUSY;
1133        }
1134        chip->irq = pci->irq;
1135        if (ac97_clock >= 8000 && ac97_clock <= 48000)
1136                chip->ac97_clock = ac97_clock;
1137        synchronize_irq(chip->irq);
1138
1139        if ((err = snd_via82xx_chip_init(chip)) < 0) {
1140                snd_via82xx_free(chip);
1141                return err;
1142        }
1143
1144        if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1145                snd_via82xx_free(chip);
1146                return err;
1147        }
1148
1149        /* The 8233 ac97 controller does not implement the master bit
1150         * in the pci command register. IMHO this is a violation of the PCI spec.
1151         * We call pci_set_master here because it does not hurt. */
1152        pci_set_master(pci);
1153
1154        *r_via = chip;
1155        return 0;
1156}
1157
1158
1159static int snd_via82xx_probe(struct pci_dev *pci,
1160                             const struct pci_device_id *pci_id)
1161{
1162        struct snd_card *card;
1163        struct via82xx_modem *chip;
1164        int chip_type = 0, card_type;
1165        unsigned int i;
1166        int err;
1167
1168        err = snd_card_new(&pci->dev, index, id, THIS_MODULE, 0, &card);
1169        if (err < 0)
1170                return err;
1171
1172        card_type = pci_id->driver_data;
1173        switch (card_type) {
1174        case TYPE_CARD_VIA82XX_MODEM:
1175                strcpy(card->driver, "VIA82XX-MODEM");
1176                sprintf(card->shortname, "VIA 82XX modem");
1177                break;
1178        default:
1179                dev_err(card->dev, "invalid card type %d\n", card_type);
1180                err = -EINVAL;
1181                goto __error;
1182        }
1183                
1184        if ((err = snd_via82xx_create(card, pci, chip_type, pci->revision,
1185                                      ac97_clock, &chip)) < 0)
1186                goto __error;
1187        card->private_data = chip;
1188        if ((err = snd_via82xx_mixer_new(chip)) < 0)
1189                goto __error;
1190
1191        if ((err = snd_via686_pcm_new(chip)) < 0 )
1192                goto __error;
1193
1194        /* disable interrupts */
1195        for (i = 0; i < chip->num_devs; i++)
1196                snd_via82xx_channel_reset(chip, &chip->devs[i]);
1197
1198        sprintf(card->longname, "%s at 0x%lx, irq %d",
1199                card->shortname, chip->port, chip->irq);
1200
1201        snd_via82xx_proc_init(chip);
1202
1203        if ((err = snd_card_register(card)) < 0) {
1204                snd_card_free(card);
1205                return err;
1206        }
1207        pci_set_drvdata(pci, card);
1208        return 0;
1209
1210 __error:
1211        snd_card_free(card);
1212        return err;
1213}
1214
1215static void snd_via82xx_remove(struct pci_dev *pci)
1216{
1217        snd_card_free(pci_get_drvdata(pci));
1218}
1219
1220static struct pci_driver via82xx_modem_driver = {
1221        .name = KBUILD_MODNAME,
1222        .id_table = snd_via82xx_modem_ids,
1223        .probe = snd_via82xx_probe,
1224        .remove = snd_via82xx_remove,
1225        .driver = {
1226                .pm = SND_VIA82XX_PM_OPS,
1227        },
1228};
1229
1230module_pci_driver(via82xx_modem_driver);
1231