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         struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
 285
 286         if (dev->table.area == NULL) {
 287                 /* the start of each lists must be aligned to 8 bytes,
 288                  * but the kernel pages are much bigger, so we don't care
 289                  */
 290                 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
 291                                         PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8),
 292                                         &dev->table) < 0)
 293                         return -ENOMEM;
 294         }
 295         if (! dev->idx_table) {
 296                 dev->idx_table = kmalloc(sizeof(*dev->idx_table) * VIA_TABLE_SIZE, GFP_KERNEL);
 297                 if (! dev->idx_table)
 298                         return -ENOMEM;
 299         }
 300
 301         /* fill the entries */
 302         idx = 0;
 303         ofs = 0;
 304         for (i = 0; i < periods; i++) {
 305                 rest = fragsize;
 306                 /* fill descriptors for a period.
 307                  * a period can be split to several descriptors if it's
 308                  * over page boundary.
 309                  */
 310                 do {
 311                         unsigned int r;
 312                         unsigned int flag;
 313
 314                         if (idx >= VIA_TABLE_SIZE) {
 315                                 snd_printk(KERN_ERR "via82xx: too much table size!\n");
 316                                 return -EINVAL;
 317                         }
 318                         ((u32 *)dev->table.area)[idx << 1] = cpu_to_le32((u32)snd_pcm_sgbuf_get_addr(sgbuf, ofs));
 319                         r = PAGE_SIZE - (ofs % PAGE_SIZE);
 320                         if (rest < r)
 321                                 r = rest;
 322                         rest -= r;
 323                         if (! rest) {
 324                                 if (i == periods - 1)
 325                                         flag = VIA_TBL_BIT_EOL; /* buffer boundary */
 326                                 else
 327                                         flag = VIA_TBL_BIT_FLAG; /* period boundary */
 328                         } else
 329                                 flag = 0; /* period continues to the next */
 330                         // printk("via: tbl %d: at %d  size %d (rest %d)\n", idx, ofs, r, rest);
 331                         ((u32 *)dev->table.area)[(idx<<1) + 1] = cpu_to_le32(r | flag);
 332                         dev->idx_table[idx].offset = ofs;
 333                         dev->idx_table[idx].size = r;
 334                         ofs += r;
 335                         idx++;
 336                 } while (rest > 0);
 337         }
 338         dev->tbl_entries = idx;
 339         dev->bufsize = periods * fragsize;
 340         dev->bufsize2 = dev->bufsize / 2;
 341         return 0;
 342 }
 343
 344
 345 static int clean_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
 346                            struct pci_dev *pci)
 347 {
 348         if (dev->table.area) {
 349                 snd_dma_free_pages(&dev->table);
 350                 dev->table.area = NULL;
 351         }
 352         kfree(dev->idx_table);
 353         dev->idx_table = NULL;
 354         return 0;
 355 }
 356
 357 /*
 358  *  Basic I/O
 359  */
 360
 361 static inline unsigned int snd_via82xx_codec_xread(struct via82xx_modem *chip)
 362 {
 363         return inl(VIAREG(chip, AC97));
 364 }
 365
 366 static inline void snd_via82xx_codec_xwrite(struct via82xx_modem *chip, unsigned int val)
 367 {
 368         outl(val, VIAREG(chip, AC97));
 369 }
 370
 371 static int snd_via82xx_codec_ready(struct via82xx_modem *chip, int secondary)
 372 {
 373         unsigned int timeout = 1000;    /* 1ms */
 374         unsigned int val;
 375
 376         while (timeout-- > 0) {
 377                 udelay(1);
 378                 if (!((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY))
 379                         return val & 0xffff;
 380         }
 381         snd_printk(KERN_ERR "codec_ready: codec %i is not ready [0x%x]\n",
 382                    secondary, snd_via82xx_codec_xread(chip));
 383         return -EIO;
 384 }
 385
 386 static int snd_via82xx_codec_valid(struct via82xx_modem *chip, int secondary)
 387 {
 388         unsigned int timeout = 1000;    /* 1ms */
 389         unsigned int val, val1;
 390         unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
 391                                          VIA_REG_AC97_SECONDARY_VALID;
 392
 393         while (timeout-- > 0) {
 394                 val = snd_via82xx_codec_xread(chip);
 395                 val1 = val & (VIA_REG_AC97_BUSY | stat);
 396                 if (val1 == stat)
 397                         return val & 0xffff;
 398                 udelay(1);
 399         }
 400         return -EIO;
 401 }
 402
 403 static void snd_via82xx_codec_wait(struct snd_ac97 *ac97)
 404 {
 405         struct via82xx_modem *chip = ac97->private_data;
 406         int err;
 407         err = snd_via82xx_codec_ready(chip, ac97->num);
 408         /* here we need to wait fairly for long time.. */
 409         msleep(500);
 410 }
 411
 412 static void snd_via82xx_codec_write(struct snd_ac97 *ac97,
 413                                     unsigned short reg,
 414                                     unsigned short val)
 415 {
 416         struct via82xx_modem *chip = ac97->private_data;
 417         unsigned int xval;
 418         if(reg == AC97_GPIO_STATUS) {
 419                 outl(val, VIAREG(chip, GPI_STATUS));
 420                 return;
 421         }
 422         xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
 423         xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
 424         xval |= reg << VIA_REG_AC97_CMD_SHIFT;
 425         xval |= val << VIA_REG_AC97_DATA_SHIFT;
 426         snd_via82xx_codec_xwrite(chip, xval);
 427         snd_via82xx_codec_ready(chip, ac97->num);
 428 }
 429
 430 static unsigned short snd_via82xx_codec_read(struct snd_ac97 *ac97, unsigned short reg)
 431 {
 432         struct via82xx_modem *chip = ac97->private_data;
 433         unsigned int xval, val = 0xffff;
 434         int again = 0;
 435
 436         xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
 437         xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
 438         xval |= VIA_REG_AC97_READ;
 439         xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
 440         while (1) {
 441                 if (again++ > 3) {
 442                         snd_printk(KERN_ERR "codec_read: codec %i is not valid [0x%x]\n",
 443                                    ac97->num, snd_via82xx_codec_xread(chip));
 444                         return 0xffff;
 445                 }
 446                 snd_via82xx_codec_xwrite(chip, xval);
 447                 udelay (20);
 448                 if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) {
 449                         udelay(25);
 450                         val = snd_via82xx_codec_xread(chip);
 451                         break;
 452                 }
 453         }
 454         return val & 0xffff;
 455 }
 456
 457 static void snd_via82xx_channel_reset(struct via82xx_modem *chip, struct viadev *viadev)
 458 {
 459         outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET,
 460              VIADEV_REG(viadev, OFFSET_CONTROL));
 461         inb(VIADEV_REG(viadev, OFFSET_CONTROL));
 462         udelay(50);
 463         /* disable interrupts */
 464         outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL));
 465         /* clear interrupts */
 466         outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS));
 467         outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */
 468         // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
 469         viadev->lastpos = 0;
 470 }
 471
 472
 473 /*
 474  *  Interrupt handler
 475  */
 476
 477 static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id)
 478 {
 479         struct via82xx_modem *chip = dev_id;
 480         unsigned int status;
 481         unsigned int i;
 482
 483         status = inl(VIAREG(chip, SGD_SHADOW));
 484         if (! (status & chip->intr_mask)) {
 485                 return IRQ_NONE;
 486         }
 487 // _skip_sgd:
 488
 489         /* check status for each stream */
 490         spin_lock(&chip->reg_lock);
 491         for (i = 0; i < chip->num_devs; i++) {
 492                 struct viadev *viadev = &chip->devs[i];
 493                 unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
 494                 c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED);
 495                 if (! c_status)
 496                         continue;
 497                 if (viadev->substream && viadev->running) {
 498                         spin_unlock(&chip->reg_lock);
 499                         snd_pcm_period_elapsed(viadev->substream);
 500                         spin_lock(&chip->reg_lock);
 501                 }
 502                 outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
 503         }
 504         spin_unlock(&chip->reg_lock);
 505         return IRQ_HANDLED;
 506 }
 507
 508 /*
 509  *  PCM callbacks
 510  */
 511
 512 /*
 513  * trigger callback
 514  */
 515 static int snd_via82xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 516 {
 517         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 518         struct viadev *viadev = substream->runtime->private_data;
 519         unsigned char val = 0;
 520
 521         switch (cmd) {
 522         case SNDRV_PCM_TRIGGER_START:
 523         case SNDRV_PCM_TRIGGER_SUSPEND:
 524                 val |= VIA_REG_CTRL_START;
 525                 viadev->running = 1;
 526                 break;
 527         case SNDRV_PCM_TRIGGER_STOP:
 528                 val = VIA_REG_CTRL_TERMINATE;
 529                 viadev->running = 0;
 530                 break;
 531         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 532                 val |= VIA_REG_CTRL_PAUSE;
 533                 viadev->running = 0;
 534                 break;
 535         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 536                 viadev->running = 1;
 537                 break;
 538         default:
 539                 return -EINVAL;
 540         }
 541         outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
 542         if (cmd == SNDRV_PCM_TRIGGER_STOP)
 543                 snd_via82xx_channel_reset(chip, viadev);
 544         return 0;
 545 }
 546
 547 /*
 548  * pointer callbacks
 549  */
 550
 551 /*
 552  * calculate the linear position at the given sg-buffer index and the rest count
 553  */
 554
 555 #define check_invalid_pos(viadev,pos) \
 556         ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 ||\
 557                                      viadev->lastpos < viadev->bufsize2))
 558
 559 static inline unsigned int calc_linear_pos(struct viadev *viadev, unsigned int idx,
 560                                            unsigned int count)
 561 {
 562         unsigned int size, res;
 563
 564         size = viadev->idx_table[idx].size;
 565         res = viadev->idx_table[idx].offset + size - count;
 566
 567         /* check the validity of the calculated position */
 568         if (size < count) {
 569                 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (size = %d, count = %d)\n",
 570                            (int)size, (int)count);
 571                 res = viadev->lastpos;
 572         } else if (check_invalid_pos(viadev, res)) {
 573 #ifdef POINTER_DEBUG
 574                 printk(KERN_DEBUG "fail: idx = %i/%i, lastpos = 0x%x, "
 575                        "bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, "
 576                        "count = 0x%x\n", idx, viadev->tbl_entries, viadev->lastpos,
 577                        viadev->bufsize2, viadev->idx_table[idx].offset,
 578                        viadev->idx_table[idx].size, count);
 579 #endif
 580                 if (count && size < count) {
 581                         snd_printd(KERN_ERR "invalid via82xx_cur_ptr, "
 582                                    "using last valid pointer\n");
 583                         res = viadev->lastpos;
 584                 } else {
 585                         if (! count)
 586                                 /* bogus count 0 on the DMA boundary? */
 587                                 res = viadev->idx_table[idx].offset;
 588                         else
 589                                 /* count register returns full size
 590                                  * when end of buffer is reached
 591                                  */
 592                                 res = viadev->idx_table[idx].offset + size;
 593                         if (check_invalid_pos(viadev, res)) {
 594                                 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (2), "
 595                                            "using last valid pointer\n");
 596                                 res = viadev->lastpos;
 597                         }
 598                 }
 599         }
 600         viadev->lastpos = res; /* remember the last position */
 601         if (res >= viadev->bufsize)
 602                 res -= viadev->bufsize;
 603         return res;
 604 }
 605
 606 /*
 607  * get the current pointer on via686
 608  */
 609 static snd_pcm_uframes_t snd_via686_pcm_pointer(struct snd_pcm_substream *substream)
 610 {
 611         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 612         struct viadev *viadev = substream->runtime->private_data;
 613         unsigned int idx, ptr, count, res;
 614
 615         snd_assert(viadev->tbl_entries, return 0);
 616         if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
 617                 return 0;
 618
 619         spin_lock(&chip->reg_lock);
 620         count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
 621         /* The via686a does not have the current index register,
 622          * so we need to calculate the index from CURR_PTR.
 623          */
 624         ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
 625         if (ptr <= (unsigned int)viadev->table.addr)
 626                 idx = 0;
 627         else /* CURR_PTR holds the address + 8 */
 628                 idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) %
 629                         viadev->tbl_entries;
 630         res = calc_linear_pos(viadev, idx, count);
 631         spin_unlock(&chip->reg_lock);
 632
 633         return bytes_to_frames(substream->runtime, res);
 634 }
 635
 636 /*
 637  * hw_params callback:
 638  * allocate the buffer and build up the buffer description table
 639  */
 640 static int snd_via82xx_hw_params(struct snd_pcm_substream *substream,
 641                                  struct snd_pcm_hw_params *hw_params)
 642 {
 643         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 644         struct viadev *viadev = substream->runtime->private_data;
 645         int err;
 646
 647         err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 648         if (err < 0)
 649                 return err;
 650         err = build_via_table(viadev, substream, chip->pci,
 651                               params_periods(hw_params),
 652                               params_period_bytes(hw_params));
 653         if (err < 0)
 654                 return err;
 655
 656         snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params));
 657         snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0);
 658
 659         return 0;
 660 }
 661
 662 /*
 663  * hw_free callback:
 664  * clean up the buffer description table and release the buffer
 665  */
 666 static int snd_via82xx_hw_free(struct snd_pcm_substream *substream)
 667 {
 668         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 669         struct viadev *viadev = substream->runtime->private_data;
 670
 671         clean_via_table(viadev, substream, chip->pci);
 672         snd_pcm_lib_free_pages(substream);
 673         return 0;
 674 }
 675
 676
 677 /*
 678  * set up the table pointer
 679  */
 680 static void snd_via82xx_set_table_ptr(struct via82xx_modem *chip, struct viadev *viadev)
 681 {
 682         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 683         outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
 684         udelay(20);
 685         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 686 }
 687
 688 /*
 689  * prepare callback for playback and capture
 690  */
 691 static int snd_via82xx_pcm_prepare(struct snd_pcm_substream *substream)
 692 {
 693         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 694         struct viadev *viadev = substream->runtime->private_data;
 695
 696         snd_via82xx_channel_reset(chip, viadev);
 697         /* this must be set after channel_reset */
 698         snd_via82xx_set_table_ptr(chip, viadev);
 699         outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG,
 700              VIADEV_REG(viadev, OFFSET_TYPE));
 701         return 0;
 702 }
 703
 704 /*
 705  * pcm hardware definition, identical for both playback and capture
 706  */
 707 static struct snd_pcm_hardware snd_via82xx_hw =
 708 {
 709         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 710                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 711                                  SNDRV_PCM_INFO_MMAP_VALID |
 712                                  /* SNDRV_PCM_INFO_RESUME | */
 713                                  SNDRV_PCM_INFO_PAUSE),
 714         .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
 715         .rates =                SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
 716         .rate_min =             8000,
 717         .rate_max =             16000,
 718         .channels_min =         1,
 719         .channels_max =         1,
 720         .buffer_bytes_max =     128 * 1024,
 721         .period_bytes_min =     32,
 722         .period_bytes_max =     128 * 1024,
 723         .periods_min =          2,
 724         .periods_max =          VIA_TABLE_SIZE / 2,
 725         .fifo_size =            0,
 726 };
 727
 728
 729 /*
 730  * open callback skeleton
 731  */
 732 static int snd_via82xx_modem_pcm_open(struct via82xx_modem *chip, struct viadev *viadev,
 733                                       struct snd_pcm_substream *substream)
 734 {
 735         struct snd_pcm_runtime *runtime = substream->runtime;
 736         int err;
 737         static unsigned int rates[] = { 8000,  9600, 12000, 16000 };
 738         static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
 739                 .count = ARRAY_SIZE(rates),
 740                 .list = rates,
 741                 .mask = 0,
 742         };
 743
 744         runtime->hw = snd_via82xx_hw;
 745
 746         if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 747                                               &hw_constraints_rates)) < 0)
 748                 return err;
 749
 750         /* we may remove following constaint when we modify table entries
 751            in interrupt */
 752         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 753                 return err;
 754
 755         runtime->private_data = viadev;
 756         viadev->substream = substream;
 757
 758         return 0;
 759 }
 760
 761
 762 /*
 763  * open callback for playback
 764  */
 765 static int snd_via82xx_playback_open(struct snd_pcm_substream *substream)
 766 {
 767         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 768         struct viadev *viadev = &chip->devs[chip->playback_devno + substream->number];
 769
 770         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 771 }
 772
 773 /*
 774  * open callback for capture
 775  */
 776 static int snd_via82xx_capture_open(struct snd_pcm_substream *substream)
 777 {
 778         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 779         struct viadev *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
 780
 781         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 782 }
 783
 784 /*
 785  * close callback
 786  */
 787 static int snd_via82xx_pcm_close(struct snd_pcm_substream *substream)
 788 {
 789         struct viadev *viadev = substream->runtime->private_data;
 790
 791         viadev->substream = NULL;
 792         return 0;
 793 }
 794
 795
 796 /* via686 playback callbacks */
 797 static struct snd_pcm_ops snd_via686_playback_ops = {
 798         .open =         snd_via82xx_playback_open,
 799         .close =        snd_via82xx_pcm_close,
 800         .ioctl =        snd_pcm_lib_ioctl,
 801         .hw_params =    snd_via82xx_hw_params,
 802         .hw_free =      snd_via82xx_hw_free,
 803         .prepare =      snd_via82xx_pcm_prepare,
 804         .trigger =      snd_via82xx_pcm_trigger,
 805         .pointer =      snd_via686_pcm_pointer,
 806         .page =         snd_pcm_sgbuf_ops_page,
 807 };
 808
 809 /* via686 capture callbacks */
 810 static struct snd_pcm_ops snd_via686_capture_ops = {
 811         .open =         snd_via82xx_capture_open,
 812         .close =        snd_via82xx_pcm_close,
 813         .ioctl =        snd_pcm_lib_ioctl,
 814         .hw_params =    snd_via82xx_hw_params,
 815         .hw_free =      snd_via82xx_hw_free,
 816         .prepare =      snd_via82xx_pcm_prepare,
 817         .trigger =      snd_via82xx_pcm_trigger,
 818         .pointer =      snd_via686_pcm_pointer,
 819         .page =         snd_pcm_sgbuf_ops_page,
 820 };
 821
 822
 823 static void init_viadev(struct via82xx_modem *chip, int idx, unsigned int reg_offset,
 824                         int direction)
 825 {
 826         chip->devs[idx].reg_offset = reg_offset;
 827         chip->devs[idx].direction = direction;
 828         chip->devs[idx].port = chip->port + reg_offset;
 829 }
 830
 831 /*
 832  * create a pcm instance for via686a/b
 833  */
 834 static int __devinit snd_via686_pcm_new(struct via82xx_modem *chip)
 835 {
 836         struct snd_pcm *pcm;
 837         int err;
 838
 839         chip->playback_devno = 0;
 840         chip->capture_devno = 1;
 841         chip->num_devs = 2;
 842         chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */
 843
 844         err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
 845         if (err < 0)
 846                 return err;
 847         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
 848         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
 849         pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
 850         pcm->private_data = chip;
 851         strcpy(pcm->name, chip->card->shortname);
 852         chip->pcms[0] = pcm;
 853         init_viadev(chip, 0, VIA_REG_MO_STATUS, 0);
 854         init_viadev(chip, 1, VIA_REG_MI_STATUS, 1);
 855
 856         if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
 857                                                          snd_dma_pci_data(chip->pci),
 858                                                          64*1024, 128*1024)) < 0)
 859                 return err;
 860
 861         return 0;
 862 }
 863
 864
 865 /*
 866  *  Mixer part
 867  */
 868
 869
 870 static void snd_via82xx_mixer_free_ac97_bus(struct snd_ac97_bus *bus)
 871 {
 872         struct via82xx_modem *chip = bus->private_data;
 873         chip->ac97_bus = NULL;
 874 }
 875
 876 static void snd_via82xx_mixer_free_ac97(struct snd_ac97 *ac97)
 877 {
 878         struct via82xx_modem *chip = ac97->private_data;
 879         chip->ac97 = NULL;
 880 }
 881
 882
 883 static int __devinit snd_via82xx_mixer_new(struct via82xx_modem *chip)
 884 {
 885         struct snd_ac97_template ac97;
 886         int err;
 887         static struct snd_ac97_bus_ops ops = {
 888                 .write = snd_via82xx_codec_write,
 889                 .read = snd_via82xx_codec_read,
 890                 .wait = snd_via82xx_codec_wait,
 891         };
 892
 893         if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
 894                 return err;
 895         chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
 896         chip->ac97_bus->clock = chip->ac97_clock;
 897
 898         memset(&ac97, 0, sizeof(ac97));
 899         ac97.private_data = chip;
 900         ac97.private_free = snd_via82xx_mixer_free_ac97;
 901         ac97.pci = chip->pci;
 902         ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;
 903         ac97.num = chip->ac97_secondary;
 904
 905         if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
 906                 return err;
 907
 908         return 0;
 909 }
 910
 911
 912 /*
 913  * proc interface
 914  */
 915 static void snd_via82xx_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
 916 {
 917         struct via82xx_modem *chip = entry->private_data;
 918         int i;
 919
 920         snd_iprintf(buffer, "%s\n\n", chip->card->longname);
 921         for (i = 0; i < 0xa0; i += 4) {
 922                 snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
 923         }
 924 }
 925
 926 static void __devinit snd_via82xx_proc_init(struct via82xx_modem *chip)
 927 {
 928         struct snd_info_entry *entry;
 929
 930         if (! snd_card_proc_new(chip->card, "via82xx", &entry))
 931                 snd_info_set_text_ops(entry, chip, snd_via82xx_proc_read);
 932 }
 933
 934 /*
 935  *
 936  */
 937
 938 static int snd_via82xx_chip_init(struct via82xx_modem *chip)
 939 {
 940         unsigned int val;
 941         unsigned long end_time;
 942         unsigned char pval;
 943
 944         pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval);
 945         if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) {
 946                 pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT);
 947                 udelay(100);
 948         }
 949
 950         pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 951         if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
 952                 /* deassert ACLink reset, force SYNC */
 953                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 954                                       VIA_ACLINK_CTRL_ENABLE |
 955                                       VIA_ACLINK_CTRL_RESET |
 956                                       VIA_ACLINK_CTRL_SYNC);
 957                 udelay(100);
 958 #if 1 /* FIXME: should we do full reset here for all chip models? */
 959                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
 960                 udelay(100);
 961 #else
 962                 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
 963                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 964                                       VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
 965                 udelay(2);
 966 #endif
 967                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 968                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 969                 udelay(100);
 970         }
 971
 972         pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
 973         if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
 974                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 975                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 976                 udelay(100);
 977         }
 978
 979         /* wait until codec ready */
 980         end_time = jiffies + msecs_to_jiffies(750);
 981         do {
 982                 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 983                 if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
 984                         break;
 985                 schedule_timeout_uninterruptible(1);
 986         } while (time_before(jiffies, end_time));
 987
 988         if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)
 989                 snd_printk(KERN_ERR "AC'97 codec is not ready [0x%x]\n", val);
 990
 991         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
 992                                  VIA_REG_AC97_SECONDARY_VALID |
 993                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
 994         end_time = jiffies + msecs_to_jiffies(750);
 995         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
 996                                  VIA_REG_AC97_SECONDARY_VALID |
 997                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
 998         do {
 999                 if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) {
1000                         chip->ac97_secondary = 1;
1001                         goto __ac97_ok2;
1002                 }
1003                 schedule_timeout_uninterruptible(1);
1004         } while (time_before(jiffies, end_time));
1005         /* This is ok, the most of motherboards have only one codec */
1006
1007       __ac97_ok2:
1008
1009         /* route FM trap to IRQ, disable FM trap */
1010         // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
1011         /* disable all GPI interrupts */
1012         outl(0, VIAREG(chip, GPI_INTR));
1013
1014         return 0;
1015 }
1016
1017 #ifdef CONFIG_PM
1018 /*
1019  * power management
1020  */
1021 static int snd_via82xx_suspend(struct pci_dev *pci, pm_message_t state)
1022 {
1023         struct snd_card *card = pci_get_drvdata(pci);
1024         struct via82xx_modem *chip = card->private_data;
1025         int i;
1026
1027         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1028         for (i = 0; i < 2; i++)
1029                 snd_pcm_suspend_all(chip->pcms[i]);
1030         for (i = 0; i < chip->num_devs; i++)
1031                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1032         synchronize_irq(chip->irq);
1033         snd_ac97_suspend(chip->ac97);
1034
1035         pci_disable_device(pci);
1036         pci_save_state(pci);
1037         pci_set_power_state(pci, pci_choose_state(pci, state));
1038         return 0;
1039 }
1040
1041 static int snd_via82xx_resume(struct pci_dev *pci)
1042 {
1043         struct snd_card *card = pci_get_drvdata(pci);
1044         struct via82xx_modem *chip = card->private_data;
1045         int i;
1046
1047         pci_set_power_state(pci, PCI_D0);
1048         pci_restore_state(pci);
1049         if (pci_enable_device(pci) < 0) {
1050                 printk(KERN_ERR "via82xx-modem: pci_enable_device failed, "
1051                        "disabling device\n");
1052                 snd_card_disconnect(card);
1053                 return -EIO;
1054         }
1055         pci_set_master(pci);
1056
1057         snd_via82xx_chip_init(chip);
1058
1059         snd_ac97_resume(chip->ac97);
1060
1061         for (i = 0; i < chip->num_devs; i++)
1062                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1063
1064         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1065         return 0;
1066 }
1067 #endif /* CONFIG_PM */
1068
1069 static int snd_via82xx_free(struct via82xx_modem *chip)
1070 {
1071         unsigned int i;
1072
1073         if (chip->irq < 0)
1074                 goto __end_hw;
1075         /* disable interrupts */
1076         for (i = 0; i < chip->num_devs; i++)
1077                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1078
1079       __end_hw:
1080         if (chip->irq >= 0)
1081                 free_irq(chip->irq, chip);
1082         pci_release_regions(chip->pci);
1083         pci_disable_device(chip->pci);
1084         kfree(chip);
1085         return 0;
1086 }
1087
1088 static int snd_via82xx_dev_free(struct snd_device *device)
1089 {
1090         struct via82xx_modem *chip = device->device_data;
1091         return snd_via82xx_free(chip);
1092 }
1093
1094 static int __devinit snd_via82xx_create(struct snd_card *card,
1095                                         struct pci_dev *pci,
1096                                         int chip_type,
1097                                         int revision,
1098                                         unsigned int ac97_clock,
1099                                         struct via82xx_modem ** r_via)
1100 {
1101         struct via82xx_modem *chip;
1102         int err;
1103         static struct snd_device_ops ops = {
1104                 .dev_free =     snd_via82xx_dev_free,
1105         };
1106
1107         if ((err = pci_enable_device(pci)) < 0)
1108                 return err;
1109
1110         if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) {
1111                 pci_disable_device(pci);
1112                 return -ENOMEM;
1113         }
1114
1115         spin_lock_init(&chip->reg_lock);
1116         chip->card = card;
1117         chip->pci = pci;
1118         chip->irq = -1;
1119
1120         if ((err = pci_request_regions(pci, card->driver)) < 0) {
1121                 kfree(chip);
1122                 pci_disable_device(pci);
1123                 return err;
1124         }
1125         chip->port = pci_resource_start(pci, 0);
1126         if (request_irq(pci->irq, snd_via82xx_interrupt, IRQF_SHARED,
1127                         card->driver, chip)) {
1128                 snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
1129                 snd_via82xx_free(chip);
1130                 return -EBUSY;
1131         }
1132         chip->irq = pci->irq;
1133         if (ac97_clock >= 8000 && ac97_clock <= 48000)
1134                 chip->ac97_clock = ac97_clock;
1135         synchronize_irq(chip->irq);
1136
1137         if ((err = snd_via82xx_chip_init(chip)) < 0) {
1138                 snd_via82xx_free(chip);
1139                 return err;
1140         }
1141
1142         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1143                 snd_via82xx_free(chip);
1144                 return err;
1145         }
1146
1147         /* The 8233 ac97 controller does not implement the master bit
1148          * in the pci command register. IMHO this is a violation of the PCI spec.
1149          * We call pci_set_master here because it does not hurt. */
1150         pci_set_master(pci);
1151
1152         snd_card_set_dev(card, &pci->dev);
1153
1154         *r_via = chip;
1155         return 0;
1156 }
1157
1158
1159 static int __devinit snd_via82xx_probe(struct pci_dev *pci,
1160                                        const struct pci_device_id *pci_id)
1161 {
1162         struct snd_card *card;
1163         struct via82xx_modem *chip;
1164         int chip_type = 0, card_type;
1165         unsigned int i;
1166         int err;
1167
1168         card = snd_card_new(index, id, THIS_MODULE, 0);
1169         if (card == NULL)
1170                 return -ENOMEM;
1171
1172         card_type = pci_id->driver_data;
1173         switch (card_type) {
1174         case TYPE_CARD_VIA82XX_MODEM:
1175                 strcpy(card->driver, "VIA82XX-MODEM");
1176                 sprintf(card->shortname, "VIA 82XX modem");
1177                 break;
1178         default:
1179                 snd_printk(KERN_ERR "invalid card type %d\n", card_type);
1180                 err = -EINVAL;
1181                 goto __error;
1182         }
1183
1184         if ((err = snd_via82xx_create(card, pci, chip_type, pci->revision,
1185                                       ac97_clock, &chip)) < 0)
1186                 goto __error;
1187         card->private_data = chip;
1188         if ((err = snd_via82xx_mixer_new(chip)) < 0)
1189                 goto __error;
1190
1191         if ((err = snd_via686_pcm_new(chip)) < 0 )
1192                 goto __error;
1193
1194         /* disable interrupts */
1195         for (i = 0; i < chip->num_devs; i++)
1196                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1197
1198         sprintf(card->longname, "%s at 0x%lx, irq %d",
1199                 card->shortname, chip->port, chip->irq);
1200
1201         snd_via82xx_proc_init(chip);
1202
1203         if ((err = snd_card_register(card)) < 0) {
1204                 snd_card_free(card);
1205                 return err;
1206         }
1207         pci_set_drvdata(pci, card);
1208         return 0;
1209
1210  __error:
1211         snd_card_free(card);
1212         return err;
1213 }
1214
1215 static void __devexit snd_via82xx_remove(struct pci_dev *pci)
1216 {
1217         snd_card_free(pci_get_drvdata(pci));
1218         pci_set_drvdata(pci, NULL);
1219 }
1220
1221 static struct pci_driver driver = {
1222         .name = "VIA 82xx Modem",
1223         .id_table = snd_via82xx_modem_ids,
1224         .probe = snd_via82xx_probe,
1225         .remove = __devexit_p(snd_via82xx_remove),
1226 #ifdef CONFIG_PM
1227         .suspend = snd_via82xx_suspend,
1228         .resume = snd_via82xx_resume,
1229 #endif
1230 };
1231
1232 static int __init alsa_card_via82xx_init(void)
1233 {
1234         return pci_register_driver(&driver);
1235 }
1236
1237 static void __exit alsa_card_via82xx_exit(void)
1238 {
1239         pci_unregister_driver(&driver);
1240 }
1241
1242 module_init(alsa_card_via82xx_init)
1243 module_exit(alsa_card_via82xx_exit)