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 <asm/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/moduleparam.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 int 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 struct pci_device_id snd_via82xx_modem_ids[] = {
 264        { 0x1106, 0x3068, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 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                                snd_printk(KERN_ERR "via82xx: 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                        // printk("via: tbl %d: at %d  size %d (rest %d)\n", idx, ofs, r, rest);
 332                        ((u32 *)dev->table.area)[(idx<<1) + 1] = cpu_to_le32(r | flag);
 333                        dev->idx_table[idx].offset = ofs;
 334                        dev->idx_table[idx].size = r;
 335                        ofs += r;
 336                        idx++;
 337                } while (rest > 0);
 338        }
 339        dev->tbl_entries = idx;
 340        dev->bufsize = periods * fragsize;
 341        dev->bufsize2 = dev->bufsize / 2;
 342        return 0;
 343}
 344
 345
 346static int clean_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
 347                           struct pci_dev *pci)
 348{
 349        if (dev->table.area) {
 350                snd_dma_free_pages(&dev->table);
 351                dev->table.area = NULL;
 352        }
 353        kfree(dev->idx_table);
 354        dev->idx_table = NULL;
 355        return 0;
 356}
 357
 358/*
 359 *  Basic I/O
 360 */
 361
 362static inline unsigned int snd_via82xx_codec_xread(struct via82xx_modem *chip)
 363{
 364        return inl(VIAREG(chip, AC97));
 365}
 366 
 367static inline void snd_via82xx_codec_xwrite(struct via82xx_modem *chip, unsigned int val)
 368{
 369        outl(val, VIAREG(chip, AC97));
 370}
 371 
 372static int snd_via82xx_codec_ready(struct via82xx_modem *chip, int secondary)
 373{
 374        unsigned int timeout = 1000;    /* 1ms */
 375        unsigned int val;
 376        
 377        while (timeout-- > 0) {
 378                udelay(1);
 379                if (!((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY))
 380                        return val & 0xffff;
 381        }
 382        snd_printk(KERN_ERR "codec_ready: codec %i is not ready [0x%x]\n",
 383                   secondary, snd_via82xx_codec_xread(chip));
 384        return -EIO;
 385}
 386 
 387static int snd_via82xx_codec_valid(struct via82xx_modem *chip, int secondary)
 388{
 389        unsigned int timeout = 1000;    /* 1ms */
 390        unsigned int val, val1;
 391        unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
 392                                         VIA_REG_AC97_SECONDARY_VALID;
 393        
 394        while (timeout-- > 0) {
 395                val = snd_via82xx_codec_xread(chip);
 396                val1 = val & (VIA_REG_AC97_BUSY | stat);
 397                if (val1 == stat)
 398                        return val & 0xffff;
 399                udelay(1);
 400        }
 401        return -EIO;
 402}
 403 
 404static void snd_via82xx_codec_wait(struct snd_ac97 *ac97)
 405{
 406        struct via82xx_modem *chip = ac97->private_data;
 407        int err;
 408        err = snd_via82xx_codec_ready(chip, ac97->num);
 409        /* here we need to wait fairly for long time.. */
 410        msleep(500);
 411}
 412
 413static void snd_via82xx_codec_write(struct snd_ac97 *ac97,
 414                                    unsigned short reg,
 415                                    unsigned short val)
 416{
 417        struct via82xx_modem *chip = ac97->private_data;
 418        unsigned int xval;
 419        if(reg == AC97_GPIO_STATUS) {
 420                outl(val, VIAREG(chip, GPI_STATUS));
 421                return;
 422        }       
 423        xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
 424        xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
 425        xval |= reg << VIA_REG_AC97_CMD_SHIFT;
 426        xval |= val << VIA_REG_AC97_DATA_SHIFT;
 427        snd_via82xx_codec_xwrite(chip, xval);
 428        snd_via82xx_codec_ready(chip, ac97->num);
 429}
 430
 431static unsigned short snd_via82xx_codec_read(struct snd_ac97 *ac97, unsigned short reg)
 432{
 433        struct via82xx_modem *chip = ac97->private_data;
 434        unsigned int xval, val = 0xffff;
 435        int again = 0;
 436
 437        xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
 438        xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
 439        xval |= VIA_REG_AC97_READ;
 440        xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
 441        while (1) {
 442                if (again++ > 3) {
 443                        snd_printk(KERN_ERR "codec_read: codec %i is not valid [0x%x]\n",
 444                                   ac97->num, snd_via82xx_codec_xread(chip));
 445                        return 0xffff;
 446                }
 447                snd_via82xx_codec_xwrite(chip, xval);
 448                udelay (20);
 449                if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) {
 450                        udelay(25);
 451                        val = snd_via82xx_codec_xread(chip);
 452                        break;
 453                }
 454        }
 455        return val & 0xffff;
 456}
 457
 458static void snd_via82xx_channel_reset(struct via82xx_modem *chip, struct viadev *viadev)
 459{
 460        outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET,
 461             VIADEV_REG(viadev, OFFSET_CONTROL));
 462        inb(VIADEV_REG(viadev, OFFSET_CONTROL));
 463        udelay(50);
 464        /* disable interrupts */
 465        outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL));
 466        /* clear interrupts */
 467        outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS));
 468        outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */
 469        // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
 470        viadev->lastpos = 0;
 471}
 472
 473
 474/*
 475 *  Interrupt handler
 476 */
 477
 478static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id)
 479{
 480        struct via82xx_modem *chip = dev_id;
 481        unsigned int status;
 482        unsigned int i;
 483
 484        status = inl(VIAREG(chip, SGD_SHADOW));
 485        if (! (status & chip->intr_mask)) {
 486                return IRQ_NONE;
 487        }
 488// _skip_sgd:
 489
 490        /* check status for each stream */
 491        spin_lock(&chip->reg_lock);
 492        for (i = 0; i < chip->num_devs; i++) {
 493                struct viadev *viadev = &chip->devs[i];
 494                unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
 495                c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED);
 496                if (! c_status)
 497                        continue;
 498                if (viadev->substream && viadev->running) {
 499                        spin_unlock(&chip->reg_lock);
 500                        snd_pcm_period_elapsed(viadev->substream);
 501                        spin_lock(&chip->reg_lock);
 502                }
 503                outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
 504        }
 505        spin_unlock(&chip->reg_lock);
 506        return IRQ_HANDLED;
 507}
 508
 509/*
 510 *  PCM callbacks
 511 */
 512
 513/*
 514 * trigger callback
 515 */
 516static int snd_via82xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 517{
 518        struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 519        struct viadev *viadev = substream->runtime->private_data;
 520        unsigned char val = 0;
 521
 522        switch (cmd) {
 523        case SNDRV_PCM_TRIGGER_START:
 524        case SNDRV_PCM_TRIGGER_SUSPEND:
 525                val |= VIA_REG_CTRL_START;
 526                viadev->running = 1;
 527                break;
 528        case SNDRV_PCM_TRIGGER_STOP:
 529                val = VIA_REG_CTRL_TERMINATE;
 530                viadev->running = 0;
 531                break;
 532        case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 533                val |= VIA_REG_CTRL_PAUSE;
 534                viadev->running = 0;
 535                break;
 536        case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 537                viadev->running = 1;
 538                break;
 539        default:
 540                return -EINVAL;
 541        }
 542        outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
 543        if (cmd == SNDRV_PCM_TRIGGER_STOP)
 544                snd_via82xx_channel_reset(chip, viadev);
 545        return 0;
 546}
 547
 548/*
 549 * pointer callbacks
 550 */
 551
 552/*
 553 * calculate the linear position at the given sg-buffer index and the rest count
 554 */
 555
 556#define check_invalid_pos(viadev,pos) \
 557        ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 ||\
 558                                     viadev->lastpos < viadev->bufsize2))
 559
 560static inline unsigned int calc_linear_pos(struct viadev *viadev, unsigned int idx,
 561                                           unsigned int count)
 562{
 563        unsigned int size, res;
 564
 565        size = viadev->idx_table[idx].size;
 566        res = viadev->idx_table[idx].offset + size - count;
 567
 568        /* check the validity of the calculated position */
 569        if (size < count) {
 570                snd_printd(KERN_ERR "invalid via82xx_cur_ptr (size = %d, count = %d)\n",
 571                           (int)size, (int)count);
 572                res = viadev->lastpos;
 573        } else if (check_invalid_pos(viadev, res)) {
 574#ifdef POINTER_DEBUG
 575                printk(KERN_DEBUG "fail: idx = %i/%i, lastpos = 0x%x, "
 576                       "bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, "
 577                       "count = 0x%x\n", idx, viadev->tbl_entries, viadev->lastpos,
 578                       viadev->bufsize2, viadev->idx_table[idx].offset,
 579                       viadev->idx_table[idx].size, count);
 580#endif
 581                if (count && size < count) {
 582                        snd_printd(KERN_ERR "invalid via82xx_cur_ptr, "
 583                                   "using last valid pointer\n");
 584                        res = viadev->lastpos;
 585                } else {
 586                        if (! count)
 587                                /* bogus count 0 on the DMA boundary? */
 588                                res = viadev->idx_table[idx].offset;
 589                        else
 590                                /* count register returns full size
 591                                 * when end of buffer is reached
 592                                 */
 593                                res = viadev->idx_table[idx].offset + size;
 594                        if (check_invalid_pos(viadev, res)) {
 595                                snd_printd(KERN_ERR "invalid via82xx_cur_ptr (2), "
 596                                           "using last valid pointer\n");
 597                                res = viadev->lastpos;
 598                        }
 599                }
 600        }
 601        viadev->lastpos = res; /* remember the last position */
 602        if (res >= viadev->bufsize)
 603                res -= viadev->bufsize;
 604        return res;
 605}
 606
 607/*
 608 * get the current pointer on via686
 609 */
 610static snd_pcm_uframes_t snd_via686_pcm_pointer(struct snd_pcm_substream *substream)
 611{
 612        struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 613        struct viadev *viadev = substream->runtime->private_data;
 614        unsigned int idx, ptr, count, res;
 615
 616        if (snd_BUG_ON(!viadev->tbl_entries))
 617                return 0;
 618        if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
 619                return 0;
 620
 621        spin_lock(&chip->reg_lock);
 622        count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
 623        /* The via686a does not have the current index register,
 624         * so we need to calculate the index from CURR_PTR.
 625         */
 626        ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
 627        if (ptr <= (unsigned int)viadev->table.addr)
 628                idx = 0;
 629        else /* CURR_PTR holds the address + 8 */
 630                idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) %
 631                        viadev->tbl_entries;
 632        res = calc_linear_pos(viadev, idx, count);
 633        spin_unlock(&chip->reg_lock);
 634
 635        return bytes_to_frames(substream->runtime, res);
 636}
 637
 638/*
 639 * hw_params callback:
 640 * allocate the buffer and build up the buffer description table
 641 */
 642static int snd_via82xx_hw_params(struct snd_pcm_substream *substream,
 643                                 struct snd_pcm_hw_params *hw_params)
 644{
 645        struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 646        struct viadev *viadev = substream->runtime->private_data;
 647        int err;
 648
 649        err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 650        if (err < 0)
 651                return err;
 652        err = build_via_table(viadev, substream, chip->pci,
 653                              params_periods(hw_params),
 654                              params_period_bytes(hw_params));
 655        if (err < 0)
 656                return err;
 657
 658        snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params));
 659        snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0);
 660
 661        return 0;
 662}
 663
 664/*
 665 * hw_free callback:
 666 * clean up the buffer description table and release the buffer
 667 */
 668static int snd_via82xx_hw_free(struct snd_pcm_substream *substream)
 669{
 670        struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 671        struct viadev *viadev = substream->runtime->private_data;
 672
 673        clean_via_table(viadev, substream, chip->pci);
 674        snd_pcm_lib_free_pages(substream);
 675        return 0;
 676}
 677
 678
 679/*
 680 * set up the table pointer
 681 */
 682static void snd_via82xx_set_table_ptr(struct via82xx_modem *chip, struct viadev *viadev)
 683{
 684        snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 685        outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
 686        udelay(20);
 687        snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 688}
 689
 690/*
 691 * prepare callback for playback and capture
 692 */
 693static int snd_via82xx_pcm_prepare(struct snd_pcm_substream *substream)
 694{
 695        struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 696        struct viadev *viadev = substream->runtime->private_data;
 697
 698        snd_via82xx_channel_reset(chip, viadev);
 699        /* this must be set after channel_reset */
 700        snd_via82xx_set_table_ptr(chip, viadev);
 701        outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG,
 702             VIADEV_REG(viadev, OFFSET_TYPE));
 703        return 0;
 704}
 705
 706/*
 707 * pcm hardware definition, identical for both playback and capture
 708 */
 709static struct snd_pcm_hardware snd_via82xx_hw =
 710{
 711        .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 712                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
 713                                 SNDRV_PCM_INFO_MMAP_VALID |
 714                                 /* SNDRV_PCM_INFO_RESUME | */
 715                                 SNDRV_PCM_INFO_PAUSE),
 716        .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
 717        .rates =                SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
 718        .rate_min =             8000,
 719        .rate_max =             16000,
 720        .channels_min =         1,
 721        .channels_max =         1,
 722        .buffer_bytes_max =     128 * 1024,
 723        .period_bytes_min =     32,
 724        .period_bytes_max =     128 * 1024,
 725        .periods_min =          2,
 726        .periods_max =          VIA_TABLE_SIZE / 2,
 727        .fifo_size =            0,
 728};
 729
 730
 731/*
 732 * open callback skeleton
 733 */
 734static int snd_via82xx_modem_pcm_open(struct via82xx_modem *chip, struct viadev *viadev,
 735                                      struct snd_pcm_substream *substream)
 736{
 737        struct snd_pcm_runtime *runtime = substream->runtime;
 738        int err;
 739        static unsigned int rates[] = { 8000,  9600, 12000, 16000 };
 740        static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
 741                .count = ARRAY_SIZE(rates),
 742                .list = rates,
 743                .mask = 0,
 744        };
 745
 746        runtime->hw = snd_via82xx_hw;
 747        
 748        if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 749                                              &hw_constraints_rates)) < 0)
 750                return err;
 751
 752        /* we may remove following constaint when we modify table entries
 753           in interrupt */
 754        if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 755                return err;
 756
 757        runtime->private_data = viadev;
 758        viadev->substream = substream;
 759
 760        return 0;
 761}
 762
 763
 764/*
 765 * open callback for playback
 766 */
 767static int snd_via82xx_playback_open(struct snd_pcm_substream *substream)
 768{
 769        struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 770        struct viadev *viadev = &chip->devs[chip->playback_devno + substream->number];
 771
 772        return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 773}
 774
 775/*
 776 * open callback for capture
 777 */
 778static int snd_via82xx_capture_open(struct snd_pcm_substream *substream)
 779{
 780        struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 781        struct viadev *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
 782
 783        return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 784}
 785
 786/*
 787 * close callback
 788 */
 789static int snd_via82xx_pcm_close(struct snd_pcm_substream *substream)
 790{
 791        struct viadev *viadev = substream->runtime->private_data;
 792
 793        viadev->substream = NULL;
 794        return 0;
 795}
 796
 797
 798/* via686 playback callbacks */
 799static struct snd_pcm_ops snd_via686_playback_ops = {
 800        .open =         snd_via82xx_playback_open,
 801        .close =        snd_via82xx_pcm_close,
 802        .ioctl =        snd_pcm_lib_ioctl,
 803        .hw_params =    snd_via82xx_hw_params,
 804        .hw_free =      snd_via82xx_hw_free,
 805        .prepare =      snd_via82xx_pcm_prepare,
 806        .trigger =      snd_via82xx_pcm_trigger,
 807        .pointer =      snd_via686_pcm_pointer,
 808        .page =         snd_pcm_sgbuf_ops_page,
 809};
 810
 811/* via686 capture callbacks */
 812static struct snd_pcm_ops snd_via686_capture_ops = {
 813        .open =         snd_via82xx_capture_open,
 814        .close =        snd_via82xx_pcm_close,
 815        .ioctl =        snd_pcm_lib_ioctl,
 816        .hw_params =    snd_via82xx_hw_params,
 817        .hw_free =      snd_via82xx_hw_free,
 818        .prepare =      snd_via82xx_pcm_prepare,
 819        .trigger =      snd_via82xx_pcm_trigger,
 820        .pointer =      snd_via686_pcm_pointer,
 821        .page =         snd_pcm_sgbuf_ops_page,
 822};
 823
 824
 825static void init_viadev(struct via82xx_modem *chip, int idx, unsigned int reg_offset,
 826                        int direction)
 827{
 828        chip->devs[idx].reg_offset = reg_offset;
 829        chip->devs[idx].direction = direction;
 830        chip->devs[idx].port = chip->port + reg_offset;
 831}
 832
 833/*
 834 * create a pcm instance for via686a/b
 835 */
 836static int __devinit snd_via686_pcm_new(struct via82xx_modem *chip)
 837{
 838        struct snd_pcm *pcm;
 839        int err;
 840
 841        chip->playback_devno = 0;
 842        chip->capture_devno = 1;
 843        chip->num_devs = 2;
 844        chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */
 845
 846        err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
 847        if (err < 0)
 848                return err;
 849        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
 850        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
 851        pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
 852        pcm->private_data = chip;
 853        strcpy(pcm->name, chip->card->shortname);
 854        chip->pcms[0] = pcm;
 855        init_viadev(chip, 0, VIA_REG_MO_STATUS, 0);
 856        init_viadev(chip, 1, VIA_REG_MI_STATUS, 1);
 857
 858        if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
 859                                                         snd_dma_pci_data(chip->pci),
 860                                                         64*1024, 128*1024)) < 0)
 861                return err;
 862
 863        return 0;
 864}
 865
 866
 867/*
 868 *  Mixer part
 869 */
 870
 871
 872static void snd_via82xx_mixer_free_ac97_bus(struct snd_ac97_bus *bus)
 873{
 874        struct via82xx_modem *chip = bus->private_data;
 875        chip->ac97_bus = NULL;
 876}
 877
 878static void snd_via82xx_mixer_free_ac97(struct snd_ac97 *ac97)
 879{
 880        struct via82xx_modem *chip = ac97->private_data;
 881        chip->ac97 = NULL;
 882}
 883
 884
 885static int __devinit snd_via82xx_mixer_new(struct via82xx_modem *chip)
 886{
 887        struct snd_ac97_template ac97;
 888        int err;
 889        static struct snd_ac97_bus_ops ops = {
 890                .write = snd_via82xx_codec_write,
 891                .read = snd_via82xx_codec_read,
 892                .wait = snd_via82xx_codec_wait,
 893        };
 894
 895        if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
 896                return err;
 897        chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
 898        chip->ac97_bus->clock = chip->ac97_clock;
 899
 900        memset(&ac97, 0, sizeof(ac97));
 901        ac97.private_data = chip;
 902        ac97.private_free = snd_via82xx_mixer_free_ac97;
 903        ac97.pci = chip->pci;
 904        ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;
 905        ac97.num = chip->ac97_secondary;
 906
 907        if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
 908                return err;
 909
 910        return 0;
 911}
 912
 913
 914/*
 915 * proc interface
 916 */
 917static void snd_via82xx_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
 918{
 919        struct via82xx_modem *chip = entry->private_data;
 920        int i;
 921        
 922        snd_iprintf(buffer, "%s\n\n", chip->card->longname);
 923        for (i = 0; i < 0xa0; i += 4) {
 924                snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
 925        }
 926}
 927
 928static void __devinit snd_via82xx_proc_init(struct via82xx_modem *chip)
 929{
 930        struct snd_info_entry *entry;
 931
 932        if (! snd_card_proc_new(chip->card, "via82xx", &entry))
 933                snd_info_set_text_ops(entry, chip, snd_via82xx_proc_read);
 934}
 935
 936/*
 937 *
 938 */
 939
 940static int snd_via82xx_chip_init(struct via82xx_modem *chip)
 941{
 942        unsigned int val;
 943        unsigned long end_time;
 944        unsigned char pval;
 945
 946        pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval);
 947        if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) {
 948                pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT);
 949                udelay(100);
 950        }
 951
 952        pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 953        if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
 954                /* deassert ACLink reset, force SYNC */
 955                pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 956                                      VIA_ACLINK_CTRL_ENABLE |
 957                                      VIA_ACLINK_CTRL_RESET |
 958                                      VIA_ACLINK_CTRL_SYNC);
 959                udelay(100);
 960#if 1 /* FIXME: should we do full reset here for all chip models? */
 961                pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
 962                udelay(100);
 963#else
 964                /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
 965                pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 966                                      VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
 967                udelay(2);
 968#endif
 969                /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 970                pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 971                udelay(100);
 972        }
 973        
 974        pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
 975        if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
 976                /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 977                pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 978                udelay(100);
 979        }
 980
 981        /* wait until codec ready */
 982        end_time = jiffies + msecs_to_jiffies(750);
 983        do {
 984                pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 985                if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
 986                        break;
 987                schedule_timeout_uninterruptible(1);
 988        } while (time_before(jiffies, end_time));
 989
 990        if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)
 991                snd_printk(KERN_ERR "AC'97 codec is not ready [0x%x]\n", val);
 992
 993        snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
 994                                 VIA_REG_AC97_SECONDARY_VALID |
 995                                 (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
 996        end_time = jiffies + msecs_to_jiffies(750);
 997        snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
 998                                 VIA_REG_AC97_SECONDARY_VALID |
 999                                 (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
1000        do {
1001                if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) {
1002                        chip->ac97_secondary = 1;
1003                        goto __ac97_ok2;
1004                }
1005                schedule_timeout_uninterruptible(1);
1006        } while (time_before(jiffies, end_time));
1007        /* This is ok, the most of motherboards have only one codec */
1008
1009      __ac97_ok2:
1010
1011        /* route FM trap to IRQ, disable FM trap */
1012        // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
1013        /* disable all GPI interrupts */
1014        outl(0, VIAREG(chip, GPI_INTR));
1015
1016        return 0;
1017}
1018
1019#ifdef CONFIG_PM
1020/*
1021 * power management
1022 */
1023static int snd_via82xx_suspend(struct pci_dev *pci, pm_message_t state)
1024{
1025        struct snd_card *card = pci_get_drvdata(pci);
1026        struct via82xx_modem *chip = card->private_data;
1027        int i;
1028
1029        snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1030        for (i = 0; i < 2; i++)
1031                snd_pcm_suspend_all(chip->pcms[i]);
1032        for (i = 0; i < chip->num_devs; i++)
1033                snd_via82xx_channel_reset(chip, &chip->devs[i]);
1034        synchronize_irq(chip->irq);
1035        snd_ac97_suspend(chip->ac97);
1036
1037        pci_disable_device(pci);
1038        pci_save_state(pci);
1039        pci_set_power_state(pci, pci_choose_state(pci, state));
1040        return 0;
1041}
1042
1043static int snd_via82xx_resume(struct pci_dev *pci)
1044{
1045        struct snd_card *card = pci_get_drvdata(pci);
1046        struct via82xx_modem *chip = card->private_data;
1047        int i;
1048
1049        pci_set_power_state(pci, PCI_D0);
1050        pci_restore_state(pci);
1051        if (pci_enable_device(pci) < 0) {
1052                printk(KERN_ERR "via82xx-modem: pci_enable_device failed, "
1053                       "disabling device\n");
1054                snd_card_disconnect(card);
1055                return -EIO;
1056        }
1057        pci_set_master(pci);
1058
1059        snd_via82xx_chip_init(chip);
1060
1061        snd_ac97_resume(chip->ac97);
1062
1063        for (i = 0; i < chip->num_devs; i++)
1064                snd_via82xx_channel_reset(chip, &chip->devs[i]);
1065
1066        snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1067        return 0;
1068}
1069#endif /* CONFIG_PM */
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 __devinit 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                        card->driver, chip)) {
1130                snd_printk(KERN_ERR "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        snd_card_set_dev(card, &pci->dev);
1155
1156        *r_via = chip;
1157        return 0;
1158}
1159
1160
1161static int __devinit snd_via82xx_probe(struct pci_dev *pci,
1162                                       const struct pci_device_id *pci_id)
1163{
1164        struct snd_card *card;
1165        struct via82xx_modem *chip;
1166        int chip_type = 0, card_type;
1167        unsigned int i;
1168        int err;
1169
1170        card = snd_card_new(index, id, THIS_MODULE, 0);
1171        if (card == NULL)
1172                return -ENOMEM;
1173
1174        card_type = pci_id->driver_data;
1175        switch (card_type) {
1176        case TYPE_CARD_VIA82XX_MODEM:
1177                strcpy(card->driver, "VIA82XX-MODEM");
1178                sprintf(card->shortname, "VIA 82XX modem");
1179                break;
1180        default:
1181                snd_printk(KERN_ERR "invalid card type %d\n", card_type);
1182                err = -EINVAL;
1183                goto __error;
1184        }
1185                
1186        if ((err = snd_via82xx_create(card, pci, chip_type, pci->revision,
1187                                      ac97_clock, &chip)) < 0)
1188                goto __error;
1189        card->private_data = chip;
1190        if ((err = snd_via82xx_mixer_new(chip)) < 0)
1191                goto __error;
1192
1193        if ((err = snd_via686_pcm_new(chip)) < 0 )
1194                goto __error;
1195
1196        /* disable interrupts */
1197        for (i = 0; i < chip->num_devs; i++)
1198                snd_via82xx_channel_reset(chip, &chip->devs[i]);
1199
1200        sprintf(card->longname, "%s at 0x%lx, irq %d",
1201                card->shortname, chip->port, chip->irq);
1202
1203        snd_via82xx_proc_init(chip);
1204
1205        if ((err = snd_card_register(card)) < 0) {
1206                snd_card_free(card);
1207                return err;
1208        }
1209        pci_set_drvdata(pci, card);
1210        return 0;
1211
1212 __error:
1213        snd_card_free(card);
1214        return err;
1215}
1216
1217static void __devexit snd_via82xx_remove(struct pci_dev *pci)
1218{
1219        snd_card_free(pci_get_drvdata(pci));
1220        pci_set_drvdata(pci, NULL);
1221}
1222
1223static struct pci_driver driver = {
1224        .name = "VIA 82xx Modem",
1225        .id_table = snd_via82xx_modem_ids,
1226        .probe = snd_via82xx_probe,
1227        .remove = __devexit_p(snd_via82xx_remove),
1228#ifdef CONFIG_PM
1229        .suspend = snd_via82xx_suspend,
1230        .resume = snd_via82xx_resume,
1231#endif
1232};
1233
1234static int __init alsa_card_via82xx_init(void)
1235{
1236        return pci_register_driver(&driver);
1237}
1238
1239static void __exit alsa_card_via82xx_exit(void)
1240{
1241        pci_unregister_driver(&driver);
1242}
1243
1244module_init(alsa_card_via82xx_init)
1245module_exit(alsa_card_via82xx_exit)
1246
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