sound/pci/via82xx_modem.c

   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
  52 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  53 MODULE_DESCRIPTION("VIA VT82xx modem");
  54 MODULE_LICENSE("GPL");
  55 MODULE_SUPPORTED_DEVICE("{{VIA,VT82C686A/B/C modem,pci}}");
  56
  57 static int index = -2; /* Exclude the first card */
  58 static char *id = SNDRV_DEFAULT_STR1;   /* ID for this card */
  59 static int ac97_clock = 48000;
  60
  61 module_param(index, int, 0444);
  62 MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge.");
  63 module_param(id, charp, 0444);
  64 MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge.");
  65 module_param(ac97_clock, int, 0444);
  66 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
  67
  68 /* just for backward compatibility */
  69 static int enable;
  70 module_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) \
 115 enum {\
 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 */
 126 DEFINE_VIA_REGSET(MO, 0x40);
 127 DEFINE_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
 212 struct snd_via_sg_table {
 213         unsigned int offset;
 214         unsigned int size;
 215 } ;
 216
 217 #define VIA_TABLE_SIZE  255
 218
 219 struct 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
 234 enum { TYPE_CARD_VIA82XX_MODEM = 1 };
 235
 236 #define VIA_MAX_MODEM_DEVS      2
 237
 238 struct 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
 263 static 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
 268 MODULE_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  */
 278 static 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
 349 static 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
 365 static inline unsigned int snd_via82xx_codec_xread(struct via82xx_modem *chip)
 366 {
 367         return inl(VIAREG(chip, AC97));
 368 }
 369
 370 static inline void snd_via82xx_codec_xwrite(struct via82xx_modem *chip, unsigned int val)
 371 {
 372         outl(val, VIAREG(chip, AC97));
 373 }
 374
 375 static 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
 390 static 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
 407 static 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
 416 static 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
 434 static 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
 461 static 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
 481 static 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  */
 519 static 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
 563 static 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  */
 613 static 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  */
 645 static 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  */
 671 static 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  */
 685 static 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  */
 696 static 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  */
 712 static 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  */
 737 static 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  */
 770 static 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  */
 781 static 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  */
 792 static 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 */
 802 static 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 */
 815 static 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
 828 static 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  */
 839 static int __devinit 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
 875 static 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
 881 static 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
 888 static int __devinit 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  */
 920 static 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
 931 static void __devinit 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
 943 static 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
1023 /*
1024  * power management
1025  */
1026 static int snd_via82xx_suspend(struct pci_dev *pci, pm_message_t state)
1027 {
1028         struct snd_card *card = pci_get_drvdata(pci);
1029         struct via82xx_modem *chip = card->private_data;
1030         int i;
1031
1032         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1033         for (i = 0; i < 2; i++)
1034                 snd_pcm_suspend_all(chip->pcms[i]);
1035         for (i = 0; i < chip->num_devs; i++)
1036                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1037         synchronize_irq(chip->irq);
1038         snd_ac97_suspend(chip->ac97);
1039
1040         pci_disable_device(pci);
1041         pci_save_state(pci);
1042         pci_set_power_state(pci, pci_choose_state(pci, state));
1043         return 0;
1044 }
1045
1046 static int snd_via82xx_resume(struct pci_dev *pci)
1047 {
1048         struct snd_card *card = pci_get_drvdata(pci);
1049         struct via82xx_modem *chip = card->private_data;
1050         int i;
1051
1052         pci_set_power_state(pci, PCI_D0);
1053         pci_restore_state(pci);
1054         if (pci_enable_device(pci) < 0) {
1055                 printk(KERN_ERR "via82xx-modem: pci_enable_device failed, "
1056                        "disabling device\n");
1057                 snd_card_disconnect(card);
1058                 return -EIO;
1059         }
1060         pci_set_master(pci);
1061
1062         snd_via82xx_chip_init(chip);
1063
1064         snd_ac97_resume(chip->ac97);
1065
1066         for (i = 0; i < chip->num_devs; i++)
1067                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1068
1069         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1070         return 0;
1071 }
1072 #endif /* CONFIG_PM */
1073
1074 static int snd_via82xx_free(struct via82xx_modem *chip)
1075 {
1076         unsigned int i;
1077
1078         if (chip->irq < 0)
1079                 goto __end_hw;
1080         /* disable interrupts */
1081         for (i = 0; i < chip->num_devs; i++)
1082                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1083
1084       __end_hw:
1085         if (chip->irq >= 0)
1086                 free_irq(chip->irq, chip);
1087         pci_release_regions(chip->pci);
1088         pci_disable_device(chip->pci);
1089         kfree(chip);
1090         return 0;
1091 }
1092
1093 static int snd_via82xx_dev_free(struct snd_device *device)
1094 {
1095         struct via82xx_modem *chip = device->device_data;
1096         return snd_via82xx_free(chip);
1097 }
1098
1099 static int __devinit snd_via82xx_create(struct snd_card *card,
1100                                         struct pci_dev *pci,
1101                                         int chip_type,
1102                                         int revision,
1103                                         unsigned int ac97_clock,
1104                                         struct via82xx_modem ** r_via)
1105 {
1106         struct via82xx_modem *chip;
1107         int err;
1108         static struct snd_device_ops ops = {
1109                 .dev_free =     snd_via82xx_dev_free,
1110         };
1111
1112         if ((err = pci_enable_device(pci)) < 0)
1113                 return err;
1114
1115         if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) {
1116                 pci_disable_device(pci);
1117                 return -ENOMEM;
1118         }
1119
1120         spin_lock_init(&chip->reg_lock);
1121         chip->card = card;
1122         chip->pci = pci;
1123         chip->irq = -1;
1124
1125         if ((err = pci_request_regions(pci, card->driver)) < 0) {
1126                 kfree(chip);
1127                 pci_disable_device(pci);
1128                 return err;
1129         }
1130         chip->port = pci_resource_start(pci, 0);
1131         if (request_irq(pci->irq, snd_via82xx_interrupt, IRQF_SHARED,
1132                         card->driver, chip)) {
1133                 snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
1134                 snd_via82xx_free(chip);
1135                 return -EBUSY;
1136         }
1137         chip->irq = pci->irq;
1138         if (ac97_clock >= 8000 && ac97_clock <= 48000)
1139                 chip->ac97_clock = ac97_clock;
1140         synchronize_irq(chip->irq);
1141
1142         if ((err = snd_via82xx_chip_init(chip)) < 0) {
1143                 snd_via82xx_free(chip);
1144                 return err;
1145         }
1146
1147         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1148                 snd_via82xx_free(chip);
1149                 return err;
1150         }
1151
1152         /* The 8233 ac97 controller does not implement the master bit
1153          * in the pci command register. IMHO this is a violation of the PCI spec.
1154          * We call pci_set_master here because it does not hurt. */
1155         pci_set_master(pci);
1156
1157         snd_card_set_dev(card, &pci->dev);
1158
1159         *r_via = chip;
1160         return 0;
1161 }
1162
1163
1164 static int __devinit snd_via82xx_probe(struct pci_dev *pci,
1165                                        const struct pci_device_id *pci_id)
1166 {
1167         struct snd_card *card;
1168         struct via82xx_modem *chip;
1169         int chip_type = 0, card_type;
1170         unsigned int i;
1171         int err;
1172
1173         err = snd_card_create(index, id, THIS_MODULE, 0, &card);
1174         if (err < 0)
1175                 return err;
1176
1177         card_type = pci_id->driver_data;
1178         switch (card_type) {
1179         case TYPE_CARD_VIA82XX_MODEM:
1180                 strcpy(card->driver, "VIA82XX-MODEM");
1181                 sprintf(card->shortname, "VIA 82XX modem");
1182                 break;
1183         default:
1184                 snd_printk(KERN_ERR "invalid card type %d\n", card_type);
1185                 err = -EINVAL;
1186                 goto __error;
1187         }
1188
1189         if ((err = snd_via82xx_create(card, pci, chip_type, pci->revision,
1190                                       ac97_clock, &chip)) < 0)
1191                 goto __error;
1192         card->private_data = chip;
1193         if ((err = snd_via82xx_mixer_new(chip)) < 0)
1194                 goto __error;
1195
1196         if ((err = snd_via686_pcm_new(chip)) < 0 )
1197                 goto __error;
1198
1199         /* disable interrupts */
1200         for (i = 0; i < chip->num_devs; i++)
1201                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1202
1203         sprintf(card->longname, "%s at 0x%lx, irq %d",
1204                 card->shortname, chip->port, chip->irq);
1205
1206         snd_via82xx_proc_init(chip);
1207
1208         if ((err = snd_card_register(card)) < 0) {
1209                 snd_card_free(card);
1210                 return err;
1211         }
1212         pci_set_drvdata(pci, card);
1213         return 0;
1214
1215  __error:
1216         snd_card_free(card);
1217         return err;
1218 }
1219
1220 static void __devexit snd_via82xx_remove(struct pci_dev *pci)
1221 {
1222         snd_card_free(pci_get_drvdata(pci));
1223         pci_set_drvdata(pci, NULL);
1224 }
1225
1226 static struct pci_driver driver = {
1227         .name = "VIA 82xx Modem",
1228         .id_table = snd_via82xx_modem_ids,
1229         .probe = snd_via82xx_probe,
1230         .remove = __devexit_p(snd_via82xx_remove),
1231 #ifdef CONFIG_PM
1232         .suspend = snd_via82xx_suspend,
1233         .resume = snd_via82xx_resume,
1234 #endif
1235 };
1236
1237 static int __init alsa_card_via82xx_init(void)
1238 {
1239         return pci_register_driver(&driver);
1240 }
1241
1242 static void __exit alsa_card_via82xx_exit(void)
1243 {
1244         pci_unregister_driver(&driver);
1245 }
1246
1247 module_init(alsa_card_via82xx_init)
1248 module_exit(alsa_card_via82xx_exit)