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/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 DEFINE_PCI_DEVICE_TABLE(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                                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                        /*
 332                        printk(KERN_DEBUG "via: tbl %d: at %d  size %d "
 333                               "(rest %d)\n", idx, ofs, r, rest);
 334                        */
 335                        ((u32 *)dev->table.area)[(idx<<1) + 1] = cpu_to_le32(r | flag);
 336                        dev->idx_table[idx].offset = ofs;
 337                        dev->idx_table[idx].size = r;
 338                        ofs += r;
 339                        idx++;
 340                } while (rest > 0);
 341        }
 342        dev->tbl_entries = idx;
 343        dev->bufsize = periods * fragsize;
 344        dev->bufsize2 = dev->bufsize / 2;
 345        return 0;
 346}
 347
 348
 349static int clean_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
 350                           struct pci_dev *pci)
 351{
 352        if (dev->table.area) {
 353                snd_dma_free_pages(&dev->table);
 354                dev->table.area = NULL;
 355        }
 356        kfree(dev->idx_table);
 357        dev->idx_table = NULL;
 358        return 0;
 359}
 360
 361/*
 362 *  Basic I/O
 363 */
 364
 365static inline unsigned int snd_via82xx_codec_xread(struct via82xx_modem *chip)
 366{
 367        return inl(VIAREG(chip, AC97));
 368}
 369 
 370static inline void snd_via82xx_codec_xwrite(struct via82xx_modem *chip, unsigned int val)
 371{
 372        outl(val, VIAREG(chip, AC97));
 373}
 374 
 375static int snd_via82xx_codec_ready(struct via82xx_modem *chip, int secondary)
 376{
 377        unsigned int timeout = 1000;    /* 1ms */
 378        unsigned int val;
 379        
 380        while (timeout-- > 0) {
 381                udelay(1);
 382                if (!((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY))
 383                        return val & 0xffff;
 384        }
 385        snd_printk(KERN_ERR "codec_ready: codec %i is not ready [0x%x]\n",
 386                   secondary, snd_via82xx_codec_xread(chip));
 387        return -EIO;
 388}
 389 
 390static int snd_via82xx_codec_valid(struct via82xx_modem *chip, int secondary)
 391{
 392        unsigned int timeout = 1000;    /* 1ms */
 393        unsigned int val, val1;
 394        unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
 395                                         VIA_REG_AC97_SECONDARY_VALID;
 396        
 397        while (timeout-- > 0) {
 398                val = snd_via82xx_codec_xread(chip);
 399                val1 = val & (VIA_REG_AC97_BUSY | stat);
 400                if (val1 == stat)
 401                        return val & 0xffff;
 402                udelay(1);
 403        }
 404        return -EIO;
 405}
 406 
 407static void snd_via82xx_codec_wait(struct snd_ac97 *ac97)
 408{
 409        struct via82xx_modem *chip = ac97->private_data;
 410        int err;
 411        err = snd_via82xx_codec_ready(chip, ac97->num);
 412        /* here we need to wait fairly for long time.. */
 413        msleep(500);
 414}
 415
 416static void snd_via82xx_codec_write(struct snd_ac97 *ac97,
 417                                    unsigned short reg,
 418                                    unsigned short val)
 419{
 420        struct via82xx_modem *chip = ac97->private_data;
 421        unsigned int xval;
 422        if(reg == AC97_GPIO_STATUS) {
 423                outl(val, VIAREG(chip, GPI_STATUS));
 424                return;
 425        }       
 426        xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
 427        xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
 428        xval |= reg << VIA_REG_AC97_CMD_SHIFT;
 429        xval |= val << VIA_REG_AC97_DATA_SHIFT;
 430        snd_via82xx_codec_xwrite(chip, xval);
 431        snd_via82xx_codec_ready(chip, ac97->num);
 432}
 433
 434static unsigned short snd_via82xx_codec_read(struct snd_ac97 *ac97, unsigned short reg)
 435{
 436        struct via82xx_modem *chip = ac97->private_data;
 437        unsigned int xval, val = 0xffff;
 438        int again = 0;
 439
 440        xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
 441        xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
 442        xval |= VIA_REG_AC97_READ;
 443        xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
 444        while (1) {
 445                if (again++ > 3) {
 446                        snd_printk(KERN_ERR "codec_read: codec %i is not valid [0x%x]\n",
 447                                   ac97->num, snd_via82xx_codec_xread(chip));
 448                        return 0xffff;
 449                }
 450                snd_via82xx_codec_xwrite(chip, xval);
 451                udelay (20);
 452                if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) {
 453                        udelay(25);
 454                        val = snd_via82xx_codec_xread(chip);
 455                        break;
 456                }
 457        }
 458        return val & 0xffff;
 459}
 460
 461static void snd_via82xx_channel_reset(struct via82xx_modem *chip, struct viadev *viadev)
 462{
 463        outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET,
 464             VIADEV_REG(viadev, OFFSET_CONTROL));
 465        inb(VIADEV_REG(viadev, OFFSET_CONTROL));
 466        udelay(50);
 467        /* disable interrupts */
 468        outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL));
 469        /* clear interrupts */
 470        outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS));
 471        outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */
 472        // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
 473        viadev->lastpos = 0;
 474}
 475
 476
 477/*
 478 *  Interrupt handler
 479 */
 480
 481static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id)
 482{
 483        struct via82xx_modem *chip = dev_id;
 484        unsigned int status;
 485        unsigned int i;
 486
 487        status = inl(VIAREG(chip, SGD_SHADOW));
 488        if (! (status & chip->intr_mask)) {
 489                return IRQ_NONE;
 490        }
 491// _skip_sgd:
 492
 493        /* check status for each stream */
 494        spin_lock(&chip->reg_lock);
 495        for (i = 0; i < chip->num_devs; i++) {
 496                struct viadev *viadev = &chip->devs[i];
 497                unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
 498                c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED);
 499                if (! c_status)
 500                        continue;
 501                if (viadev->substream && viadev->running) {
 502                        spin_unlock(&chip->reg_lock);
 503                        snd_pcm_period_elapsed(viadev->substream);
 504                        spin_lock(&chip->reg_lock);
 505                }
 506                outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
 507        }
 508        spin_unlock(&chip->reg_lock);
 509        return IRQ_HANDLED;
 510}
 511
 512/*
 513 *  PCM callbacks
 514 */
 515
 516/*
 517 * trigger callback
 518 */
 519static int snd_via82xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 520{
 521        struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 522        struct viadev *viadev = substream->runtime->private_data;
 523        unsigned char val = 0;
 524
 525        switch (cmd) {
 526        case SNDRV_PCM_TRIGGER_START:
 527        case SNDRV_PCM_TRIGGER_SUSPEND:
 528                val |= VIA_REG_CTRL_START;
 529                viadev->running = 1;
 530                break;
 531        case SNDRV_PCM_TRIGGER_STOP:
 532                val = VIA_REG_CTRL_TERMINATE;
 533                viadev->running = 0;
 534                break;
 535        case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 536                val |= VIA_REG_CTRL_PAUSE;
 537                viadev->running = 0;
 538                break;
 539        case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 540                viadev->running = 1;
 541                break;
 542        default:
 543                return -EINVAL;
 544        }
 545        outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
 546        if (cmd == SNDRV_PCM_TRIGGER_STOP)
 547                snd_via82xx_channel_reset(chip, viadev);
 548        return 0;
 549}
 550
 551/*
 552 * pointer callbacks
 553 */
 554
 555/*
 556 * calculate the linear position at the given sg-buffer index and the rest count
 557 */
 558
 559#define check_invalid_pos(viadev,pos) \
 560        ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 ||\
 561                                     viadev->lastpos < viadev->bufsize2))
 562
 563static inline unsigned int calc_linear_pos(struct viadev *viadev, unsigned int idx,
 564                                           unsigned int count)
 565{
 566        unsigned int size, res;
 567
 568        size = viadev->idx_table[idx].size;
 569        res = viadev->idx_table[idx].offset + size - count;
 570
 571        /* check the validity of the calculated position */
 572        if (size < count) {
 573                snd_printd(KERN_ERR "invalid via82xx_cur_ptr (size = %d, count = %d)\n",
 574                           (int)size, (int)count);
 575                res = viadev->lastpos;
 576        } else if (check_invalid_pos(viadev, res)) {
 577#ifdef POINTER_DEBUG
 578                printk(KERN_DEBUG "fail: idx = %i/%i, lastpos = 0x%x, "
 579                       "bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, "
 580                       "count = 0x%x\n", idx, viadev->tbl_entries, viadev->lastpos,
 581                       viadev->bufsize2, viadev->idx_table[idx].offset,
 582                       viadev->idx_table[idx].size, count);
 583#endif
 584                if (count && size < count) {
 585                        snd_printd(KERN_ERR "invalid via82xx_cur_ptr, "
 586                                   "using last valid pointer\n");
 587                        res = viadev->lastpos;
 588                } else {
 589                        if (! count)
 590                                /* bogus count 0 on the DMA boundary? */
 591                                res = viadev->idx_table[idx].offset;
 592                        else
 593                                /* count register returns full size
 594                                 * when end of buffer is reached
 595                                 */
 596                                res = viadev->idx_table[idx].offset + size;
 597                        if (check_invalid_pos(viadev, res)) {
 598                                snd_printd(KERN_ERR "invalid via82xx_cur_ptr (2), "
 599                                           "using last valid pointer\n");
 600                                res = viadev->lastpos;
 601                        }
 602                }
 603        }
 604        viadev->lastpos = res; /* remember the last position */
 605        if (res >= viadev->bufsize)
 606                res -= viadev->bufsize;
 607        return res;
 608}
 609
 610/*
 611 * get the current pointer on via686
 612 */
 613static snd_pcm_uframes_t snd_via686_pcm_pointer(struct snd_pcm_substream *substream)
 614{
 615        struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 616        struct viadev *viadev = substream->runtime->private_data;
 617        unsigned int idx, ptr, count, res;
 618
 619        if (snd_BUG_ON(!viadev->tbl_entries))
 620                return 0;
 621        if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
 622                return 0;
 623
 624        spin_lock(&chip->reg_lock);
 625        count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
 626        /* The via686a does not have the current index register,
 627         * so we need to calculate the index from CURR_PTR.
 628         */
 629        ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
 630        if (ptr <= (unsigned int)viadev->table.addr)
 631                idx = 0;
 632        else /* CURR_PTR holds the address + 8 */
 633                idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) %
 634                        viadev->tbl_entries;
 635        res = calc_linear_pos(viadev, idx, count);
 636        spin_unlock(&chip->reg_lock);
 637
 638        return bytes_to_frames(substream->runtime, res);
 639}
 640
 641/*
 642 * hw_params callback:
 643 * allocate the buffer and build up the buffer description table
 644 */
 645static int snd_via82xx_hw_params(struct snd_pcm_substream *substream,
 646                                 struct snd_pcm_hw_params *hw_params)
 647{
 648        struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 649        struct viadev *viadev = substream->runtime->private_data;
 650        int err;
 651
 652        err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 653        if (err < 0)
 654                return err;
 655        err = build_via_table(viadev, substream, chip->pci,
 656                              params_periods(hw_params),
 657                              params_period_bytes(hw_params));
 658        if (err < 0)
 659                return err;
 660
 661        snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params));
 662        snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0);
 663
 664        return 0;
 665}
 666
 667/*
 668 * hw_free callback:
 669 * clean up the buffer description table and release the buffer
 670 */
 671static int snd_via82xx_hw_free(struct snd_pcm_substream *substream)
 672{
 673        struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 674        struct viadev *viadev = substream->runtime->private_data;
 675
 676        clean_via_table(viadev, substream, chip->pci);
 677        snd_pcm_lib_free_pages(substream);
 678        return 0;
 679}
 680
 681
 682/*
 683 * set up the table pointer
 684 */
 685static void snd_via82xx_set_table_ptr(struct via82xx_modem *chip, struct viadev *viadev)
 686{
 687        snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 688        outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
 689        udelay(20);
 690        snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 691}
 692
 693/*
 694 * prepare callback for playback and capture
 695 */
 696static int snd_via82xx_pcm_prepare(struct snd_pcm_substream *substream)
 697{
 698        struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 699        struct viadev *viadev = substream->runtime->private_data;
 700
 701        snd_via82xx_channel_reset(chip, viadev);
 702        /* this must be set after channel_reset */
 703        snd_via82xx_set_table_ptr(chip, viadev);
 704        outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG,
 705             VIADEV_REG(viadev, OFFSET_TYPE));
 706        return 0;
 707}
 708
 709/*
 710 * pcm hardware definition, identical for both playback and capture
 711 */
 712static struct snd_pcm_hardware snd_via82xx_hw =
 713{
 714        .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 715                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
 716                                 SNDRV_PCM_INFO_MMAP_VALID |
 717                                 /* SNDRV_PCM_INFO_RESUME | */
 718                                 SNDRV_PCM_INFO_PAUSE),
 719        .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
 720        .rates =                SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
 721        .rate_min =             8000,
 722        .rate_max =             16000,
 723        .channels_min =         1,
 724        .channels_max =         1,
 725        .buffer_bytes_max =     128 * 1024,
 726        .period_bytes_min =     32,
 727        .period_bytes_max =     128 * 1024,
 728        .periods_min =          2,
 729        .periods_max =          VIA_TABLE_SIZE / 2,
 730        .fifo_size =            0,
 731};
 732
 733
 734/*
 735 * open callback skeleton
 736 */
 737static int snd_via82xx_modem_pcm_open(struct via82xx_modem *chip, struct viadev *viadev,
 738                                      struct snd_pcm_substream *substream)
 739{
 740        struct snd_pcm_runtime *runtime = substream->runtime;
 741        int err;
 742        static unsigned int rates[] = { 8000,  9600, 12000, 16000 };
 743        static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
 744                .count = ARRAY_SIZE(rates),
 745                .list = rates,
 746                .mask = 0,
 747        };
 748
 749        runtime->hw = snd_via82xx_hw;
 750        
 751        if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 752                                              &hw_constraints_rates)) < 0)
 753                return err;
 754
 755        /* we may remove following constaint when we modify table entries
 756           in interrupt */
 757        if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 758                return err;
 759
 760        runtime->private_data = viadev;
 761        viadev->substream = substream;
 762
 763        return 0;
 764}
 765
 766
 767/*
 768 * open callback for playback
 769 */
 770static int snd_via82xx_playback_open(struct snd_pcm_substream *substream)
 771{
 772        struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 773        struct viadev *viadev = &chip->devs[chip->playback_devno + substream->number];
 774
 775        return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 776}
 777
 778/*
 779 * open callback for capture
 780 */
 781static int snd_via82xx_capture_open(struct snd_pcm_substream *substream)
 782{
 783        struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 784        struct viadev *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
 785
 786        return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 787}
 788
 789/*
 790 * close callback
 791 */
 792static int snd_via82xx_pcm_close(struct snd_pcm_substream *substream)
 793{
 794        struct viadev *viadev = substream->runtime->private_data;
 795
 796        viadev->substream = NULL;
 797        return 0;
 798}
 799
 800
 801/* via686 playback callbacks */
 802static struct snd_pcm_ops snd_via686_playback_ops = {
 803        .open =         snd_via82xx_playback_open,
 804        .close =        snd_via82xx_pcm_close,
 805        .ioctl =        snd_pcm_lib_ioctl,
 806        .hw_params =    snd_via82xx_hw_params,
 807        .hw_free =      snd_via82xx_hw_free,
 808        .prepare =      snd_via82xx_pcm_prepare,
 809        .trigger =      snd_via82xx_pcm_trigger,
 810        .pointer =      snd_via686_pcm_pointer,
 811        .page =         snd_pcm_sgbuf_ops_page,
 812};
 813
 814/* via686 capture callbacks */
 815static struct snd_pcm_ops snd_via686_capture_ops = {
 816        .open =         snd_via82xx_capture_open,
 817        .close =        snd_via82xx_pcm_close,
 818        .ioctl =        snd_pcm_lib_ioctl,
 819        .hw_params =    snd_via82xx_hw_params,
 820        .hw_free =      snd_via82xx_hw_free,
 821        .prepare =      snd_via82xx_pcm_prepare,
 822        .trigger =      snd_via82xx_pcm_trigger,
 823        .pointer =      snd_via686_pcm_pointer,
 824        .page =         snd_pcm_sgbuf_ops_page,
 825};
 826
 827
 828static void init_viadev(struct via82xx_modem *chip, int idx, unsigned int reg_offset,
 829                        int direction)
 830{
 831        chip->devs[idx].reg_offset = reg_offset;
 832        chip->devs[idx].direction = direction;
 833        chip->devs[idx].port = chip->port + reg_offset;
 834}
 835
 836/*
 837 * create a pcm instance for via686a/b
 838 */
 839static int snd_via686_pcm_new(struct via82xx_modem *chip)
 840{
 841        struct snd_pcm *pcm;
 842        int err;
 843
 844        chip->playback_devno = 0;
 845        chip->capture_devno = 1;
 846        chip->num_devs = 2;
 847        chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */
 848
 849        err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
 850        if (err < 0)
 851                return err;
 852        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
 853        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
 854        pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
 855        pcm->private_data = chip;
 856        strcpy(pcm->name, chip->card->shortname);
 857        chip->pcms[0] = pcm;
 858        init_viadev(chip, 0, VIA_REG_MO_STATUS, 0);
 859        init_viadev(chip, 1, VIA_REG_MI_STATUS, 1);
 860
 861        if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
 862                                                         snd_dma_pci_data(chip->pci),
 863                                                         64*1024, 128*1024)) < 0)
 864                return err;
 865
 866        return 0;
 867}
 868
 869
 870/*
 871 *  Mixer part
 872 */
 873
 874
 875static void snd_via82xx_mixer_free_ac97_bus(struct snd_ac97_bus *bus)
 876{
 877        struct via82xx_modem *chip = bus->private_data;
 878        chip->ac97_bus = NULL;
 879}
 880
 881static void snd_via82xx_mixer_free_ac97(struct snd_ac97 *ac97)
 882{
 883        struct via82xx_modem *chip = ac97->private_data;
 884        chip->ac97 = NULL;
 885}
 886
 887
 888static int snd_via82xx_mixer_new(struct via82xx_modem *chip)
 889{
 890        struct snd_ac97_template ac97;
 891        int err;
 892        static struct snd_ac97_bus_ops ops = {
 893                .write = snd_via82xx_codec_write,
 894                .read = snd_via82xx_codec_read,
 895                .wait = snd_via82xx_codec_wait,
 896        };
 897
 898        if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
 899                return err;
 900        chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
 901        chip->ac97_bus->clock = chip->ac97_clock;
 902
 903        memset(&ac97, 0, sizeof(ac97));
 904        ac97.private_data = chip;
 905        ac97.private_free = snd_via82xx_mixer_free_ac97;
 906        ac97.pci = chip->pci;
 907        ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;
 908        ac97.num = chip->ac97_secondary;
 909
 910        if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
 911                return err;
 912
 913        return 0;
 914}
 915
 916
 917/*
 918 * proc interface
 919 */
 920static void snd_via82xx_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
 921{
 922        struct via82xx_modem *chip = entry->private_data;
 923        int i;
 924        
 925        snd_iprintf(buffer, "%s\n\n", chip->card->longname);
 926        for (i = 0; i < 0xa0; i += 4) {
 927                snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
 928        }
 929}
 930
 931static void snd_via82xx_proc_init(struct via82xx_modem *chip)
 932{
 933        struct snd_info_entry *entry;
 934
 935        if (! snd_card_proc_new(chip->card, "via82xx", &entry))
 936                snd_info_set_text_ops(entry, chip, snd_via82xx_proc_read);
 937}
 938
 939/*
 940 *
 941 */
 942
 943static int snd_via82xx_chip_init(struct via82xx_modem *chip)
 944{
 945        unsigned int val;
 946        unsigned long end_time;
 947        unsigned char pval;
 948
 949        pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval);
 950        if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) {
 951                pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT);
 952                udelay(100);
 953        }
 954
 955        pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 956        if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
 957                /* deassert ACLink reset, force SYNC */
 958                pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 959                                      VIA_ACLINK_CTRL_ENABLE |
 960                                      VIA_ACLINK_CTRL_RESET |
 961                                      VIA_ACLINK_CTRL_SYNC);
 962                udelay(100);
 963#if 1 /* FIXME: should we do full reset here for all chip models? */
 964                pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
 965                udelay(100);
 966#else
 967                /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
 968                pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 969                                      VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
 970                udelay(2);
 971#endif
 972                /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 973                pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 974                udelay(100);
 975        }
 976        
 977        pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
 978        if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
 979                /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 980                pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 981                udelay(100);
 982        }
 983
 984        /* wait until codec ready */
 985        end_time = jiffies + msecs_to_jiffies(750);
 986        do {
 987                pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 988                if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
 989                        break;
 990                schedule_timeout_uninterruptible(1);
 991        } while (time_before(jiffies, end_time));
 992
 993        if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)
 994                snd_printk(KERN_ERR "AC'97 codec is not ready [0x%x]\n", val);
 995
 996        snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
 997                                 VIA_REG_AC97_SECONDARY_VALID |
 998                                 (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
 999        end_time = jiffies + msecs_to_jiffies(750);
1000        snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
1001                                 VIA_REG_AC97_SECONDARY_VALID |
1002                                 (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
1003        do {
1004                if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) {
1005                        chip->ac97_secondary = 1;
1006                        goto __ac97_ok2;
1007                }
1008                schedule_timeout_uninterruptible(1);
1009        } while (time_before(jiffies, end_time));
1010        /* This is ok, the most of motherboards have only one codec */
1011
1012      __ac97_ok2:
1013
1014        /* route FM trap to IRQ, disable FM trap */
1015        // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
1016        /* disable all GPI interrupts */
1017        outl(0, VIAREG(chip, GPI_INTR));
1018
1019        return 0;
1020}
1021
1022#ifdef CONFIG_PM_SLEEP
1023/*
1024 * power management
1025 */
1026static int snd_via82xx_suspend(struct device *dev)
1027{
1028        struct pci_dev *pci = to_pci_dev(dev);
1029        struct snd_card *card = dev_get_drvdata(dev);
1030        struct via82xx_modem *chip = card->private_data;
1031        int i;
1032
1033        snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1034        for (i = 0; i < 2; i++)
1035                snd_pcm_suspend_all(chip->pcms[i]);
1036        for (i = 0; i < chip->num_devs; i++)
1037                snd_via82xx_channel_reset(chip, &chip->devs[i]);
1038        synchronize_irq(chip->irq);
1039        snd_ac97_suspend(chip->ac97);
1040
1041        pci_disable_device(pci);
1042        pci_save_state(pci);
1043        pci_set_power_state(pci, PCI_D3hot);
1044        return 0;
1045}
1046
1047static int snd_via82xx_resume(struct device *dev)
1048{
1049        struct pci_dev *pci = to_pci_dev(dev);
1050        struct snd_card *card = dev_get_drvdata(dev);
1051        struct via82xx_modem *chip = card->private_data;
1052        int i;
1053
1054        pci_set_power_state(pci, PCI_D0);
1055        pci_restore_state(pci);
1056        if (pci_enable_device(pci) < 0) {
1057                printk(KERN_ERR "via82xx-modem: pci_enable_device failed, "
1058                       "disabling device\n");
1059                snd_card_disconnect(card);
1060                return -EIO;
1061        }
1062        pci_set_master(pci);
1063
1064        snd_via82xx_chip_init(chip);
1065
1066        snd_ac97_resume(chip->ac97);
1067
1068        for (i = 0; i < chip->num_devs; i++)
1069                snd_via82xx_channel_reset(chip, &chip->devs[i]);
1070
1071        snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1072        return 0;
1073}
1074
1075static SIMPLE_DEV_PM_OPS(snd_via82xx_pm, snd_via82xx_suspend, snd_via82xx_resume);
1076#define SND_VIA82XX_PM_OPS      &snd_via82xx_pm
1077#else
1078#define SND_VIA82XX_PM_OPS      NULL
1079#endif /* CONFIG_PM_SLEEP */
1080
1081static int snd_via82xx_free(struct via82xx_modem *chip)
1082{
1083        unsigned int i;
1084
1085        if (chip->irq < 0)
1086                goto __end_hw;
1087        /* disable interrupts */
1088        for (i = 0; i < chip->num_devs; i++)
1089                snd_via82xx_channel_reset(chip, &chip->devs[i]);
1090
1091      __end_hw:
1092        if (chip->irq >= 0)
1093                free_irq(chip->irq, chip);
1094        pci_release_regions(chip->pci);
1095        pci_disable_device(chip->pci);
1096        kfree(chip);
1097        return 0;
1098}
1099
1100static int snd_via82xx_dev_free(struct snd_device *device)
1101{
1102        struct via82xx_modem *chip = device->device_data;
1103        return snd_via82xx_free(chip);
1104}
1105
1106static int snd_via82xx_create(struct snd_card *card,
1107                              struct pci_dev *pci,
1108                              int chip_type,
1109                              int revision,
1110                              unsigned int ac97_clock,
1111                              struct via82xx_modem **r_via)
1112{
1113        struct via82xx_modem *chip;
1114        int err;
1115        static struct snd_device_ops ops = {
1116                .dev_free =     snd_via82xx_dev_free,
1117        };
1118
1119        if ((err = pci_enable_device(pci)) < 0)
1120                return err;
1121
1122        if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) {
1123                pci_disable_device(pci);
1124                return -ENOMEM;
1125        }
1126
1127        spin_lock_init(&chip->reg_lock);
1128        chip->card = card;
1129        chip->pci = pci;
1130        chip->irq = -1;
1131
1132        if ((err = pci_request_regions(pci, card->driver)) < 0) {
1133                kfree(chip);
1134                pci_disable_device(pci);
1135                return err;
1136        }
1137        chip->port = pci_resource_start(pci, 0);
1138        if (request_irq(pci->irq, snd_via82xx_interrupt, IRQF_SHARED,
1139                        KBUILD_MODNAME, chip)) {
1140                snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
1141                snd_via82xx_free(chip);
1142                return -EBUSY;
1143        }
1144        chip->irq = pci->irq;
1145        if (ac97_clock >= 8000 && ac97_clock <= 48000)
1146                chip->ac97_clock = ac97_clock;
1147        synchronize_irq(chip->irq);
1148
1149        if ((err = snd_via82xx_chip_init(chip)) < 0) {
1150                snd_via82xx_free(chip);
1151                return err;
1152        }
1153
1154        if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1155                snd_via82xx_free(chip);
1156                return err;
1157        }
1158
1159        /* The 8233 ac97 controller does not implement the master bit
1160         * in the pci command register. IMHO this is a violation of the PCI spec.
1161         * We call pci_set_master here because it does not hurt. */
1162        pci_set_master(pci);
1163
1164        snd_card_set_dev(card, &pci->dev);
1165
1166        *r_via = chip;
1167        return 0;
1168}
1169
1170
1171static int snd_via82xx_probe(struct pci_dev *pci,
1172                             const struct pci_device_id *pci_id)
1173{
1174        struct snd_card *card;
1175        struct via82xx_modem *chip;
1176        int chip_type = 0, card_type;
1177        unsigned int i;
1178        int err;
1179
1180        err = snd_card_create(index, id, THIS_MODULE, 0, &card);
1181        if (err < 0)
1182                return err;
1183
1184        card_type = pci_id->driver_data;
1185        switch (card_type) {
1186        case TYPE_CARD_VIA82XX_MODEM:
1187                strcpy(card->driver, "VIA82XX-MODEM");
1188                sprintf(card->shortname, "VIA 82XX modem");
1189                break;
1190        default:
1191                snd_printk(KERN_ERR "invalid card type %d\n", card_type);
1192                err = -EINVAL;
1193                goto __error;
1194        }
1195                
1196        if ((err = snd_via82xx_create(card, pci, chip_type, pci->revision,
1197                                      ac97_clock, &chip)) < 0)
1198                goto __error;
1199        card->private_data = chip;
1200        if ((err = snd_via82xx_mixer_new(chip)) < 0)
1201                goto __error;
1202
1203        if ((err = snd_via686_pcm_new(chip)) < 0 )
1204                goto __error;
1205
1206        /* disable interrupts */
1207        for (i = 0; i < chip->num_devs; i++)
1208                snd_via82xx_channel_reset(chip, &chip->devs[i]);
1209
1210        sprintf(card->longname, "%s at 0x%lx, irq %d",
1211                card->shortname, chip->port, chip->irq);
1212
1213        snd_via82xx_proc_init(chip);
1214
1215        if ((err = snd_card_register(card)) < 0) {
1216                snd_card_free(card);
1217                return err;
1218        }
1219        pci_set_drvdata(pci, card);
1220        return 0;
1221
1222 __error:
1223        snd_card_free(card);
1224        return err;
1225}
1226
1227static void snd_via82xx_remove(struct pci_dev *pci)
1228{
1229        snd_card_free(pci_get_drvdata(pci));
1230}
1231
1232static struct pci_driver via82xx_modem_driver = {
1233        .name = KBUILD_MODNAME,
1234        .id_table = snd_via82xx_modem_ids,
1235        .probe = snd_via82xx_probe,
1236        .remove = snd_via82xx_remove,
1237        .driver = {
1238                .pm = SND_VIA82XX_PM_OPS,
1239        },
1240};
1241
1242module_pci_driver(via82xx_modem_driver);
1243
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