git.oblomov.eu Git - linux-2.6/blob - 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@suse.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 <sound/driver.h>
  35 #include <asm/io.h>
  36 #include <linux/delay.h>
  37 #include <linux/interrupt.h>
  38 #include <linux/init.h>
  39 #include <linux/pci.h>
  40 #include <linux/slab.h>
  41 #include <linux/moduleparam.h>
  42 #include <sound/core.h>
  43 #include <sound/pcm.h>
  44 #include <sound/pcm_params.h>
  45 #include <sound/info.h>
  46 #include <sound/ac97_codec.h>
  47 #include <sound/initval.h>
  48
  49 #if 0
  50 #define POINTER_DEBUG
  51 #endif
  52
  53 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
  54 MODULE_DESCRIPTION("VIA VT82xx modem");
  55 MODULE_LICENSE("GPL");
  56 MODULE_SUPPORTED_DEVICE("{{VIA,VT82C686A/B/C modem,pci}}");
  57
  58 static int index = -2; /* Exclude the first card */
  59 static char *id = SNDRV_DEFAULT_STR1;   /* ID for this card */
  60 static int ac97_clock = 48000;
  61
  62 module_param(index, int, 0444);
  63 MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge.");
  64 module_param(id, charp, 0444);
  65 MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge.");
  66 module_param(ac97_clock, int, 0444);
  67 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
  68
  69 /* just for backward compatibility */
  70 static int enable;
  71 module_param(enable, bool, 0444);
  72
  73
  74 /*
  75  *  Direct registers
  76  */
  77
  78 #define VIAREG(via, x) ((via)->port + VIA_REG_##x)
  79 #define VIADEV_REG(viadev, x) ((viadev)->port + VIA_REG_##x)
  80
  81 /* common offsets */
  82 #define VIA_REG_OFFSET_STATUS           0x00    /* byte - channel status */
  83 #define   VIA_REG_STAT_ACTIVE           0x80    /* RO */
  84 #define   VIA_REG_STAT_PAUSED           0x40    /* RO */
  85 #define   VIA_REG_STAT_TRIGGER_QUEUED   0x08    /* RO */
  86 #define   VIA_REG_STAT_STOPPED          0x04    /* RWC */
  87 #define   VIA_REG_STAT_EOL              0x02    /* RWC */
  88 #define   VIA_REG_STAT_FLAG             0x01    /* RWC */
  89 #define VIA_REG_OFFSET_CONTROL          0x01    /* byte - channel control */
  90 #define   VIA_REG_CTRL_START            0x80    /* WO */
  91 #define   VIA_REG_CTRL_TERMINATE        0x40    /* WO */
  92 #define   VIA_REG_CTRL_AUTOSTART        0x20
  93 #define   VIA_REG_CTRL_PAUSE            0x08    /* RW */
  94 #define   VIA_REG_CTRL_INT_STOP         0x04
  95 #define   VIA_REG_CTRL_INT_EOL          0x02
  96 #define   VIA_REG_CTRL_INT_FLAG         0x01
  97 #define   VIA_REG_CTRL_RESET            0x01    /* RW - probably reset? undocumented */
  98 #define   VIA_REG_CTRL_INT (VIA_REG_CTRL_INT_FLAG | VIA_REG_CTRL_INT_EOL | VIA_REG_CTRL_AUTOSTART)
  99 #define VIA_REG_OFFSET_TYPE             0x02    /* byte - channel type (686 only) */
 100 #define   VIA_REG_TYPE_AUTOSTART        0x80    /* RW - autostart at EOL */
 101 #define   VIA_REG_TYPE_16BIT            0x20    /* RW */
 102 #define   VIA_REG_TYPE_STEREO           0x10    /* RW */
 103 #define   VIA_REG_TYPE_INT_LLINE        0x00
 104 #define   VIA_REG_TYPE_INT_LSAMPLE      0x04
 105 #define   VIA_REG_TYPE_INT_LESSONE      0x08
 106 #define   VIA_REG_TYPE_INT_MASK         0x0c
 107 #define   VIA_REG_TYPE_INT_EOL          0x02
 108 #define   VIA_REG_TYPE_INT_FLAG         0x01
 109 #define VIA_REG_OFFSET_TABLE_PTR        0x04    /* dword - channel table pointer */
 110 #define VIA_REG_OFFSET_CURR_PTR         0x04    /* dword - channel current pointer */
 111 #define VIA_REG_OFFSET_STOP_IDX         0x08    /* dword - stop index, channel type, sample rate */
 112 #define VIA_REG_OFFSET_CURR_COUNT       0x0c    /* dword - channel current count (24 bit) */
 113 #define VIA_REG_OFFSET_CURR_INDEX       0x0f    /* byte - channel current index (for via8233 only) */
 114
 115 #define DEFINE_VIA_REGSET(name,val) \
 116 enum {\
 117         VIA_REG_##name##_STATUS         = (val),\
 118         VIA_REG_##name##_CONTROL        = (val) + 0x01,\
 119         VIA_REG_##name##_TYPE           = (val) + 0x02,\
 120         VIA_REG_##name##_TABLE_PTR      = (val) + 0x04,\
 121         VIA_REG_##name##_CURR_PTR       = (val) + 0x04,\
 122         VIA_REG_##name##_STOP_IDX       = (val) + 0x08,\
 123         VIA_REG_##name##_CURR_COUNT     = (val) + 0x0c,\
 124 }
 125
 126 /* modem block */
 127 DEFINE_VIA_REGSET(MO, 0x40);
 128 DEFINE_VIA_REGSET(MI, 0x50);
 129
 130 /* AC'97 */
 131 #define VIA_REG_AC97                    0x80    /* dword */
 132 #define   VIA_REG_AC97_CODEC_ID_MASK    (3<<30)
 133 #define   VIA_REG_AC97_CODEC_ID_SHIFT   30
 134 #define   VIA_REG_AC97_CODEC_ID_PRIMARY 0x00
 135 #define   VIA_REG_AC97_CODEC_ID_SECONDARY 0x01
 136 #define   VIA_REG_AC97_SECONDARY_VALID  (1<<27)
 137 #define   VIA_REG_AC97_PRIMARY_VALID    (1<<25)
 138 #define   VIA_REG_AC97_BUSY             (1<<24)
 139 #define   VIA_REG_AC97_READ             (1<<23)
 140 #define   VIA_REG_AC97_CMD_SHIFT        16
 141 #define   VIA_REG_AC97_CMD_MASK         0x7e
 142 #define   VIA_REG_AC97_DATA_SHIFT       0
 143 #define   VIA_REG_AC97_DATA_MASK        0xffff
 144
 145 #define VIA_REG_SGD_SHADOW              0x84    /* dword */
 146 #define   VIA_REG_SGD_STAT_PB_FLAG      (1<<0)
 147 #define   VIA_REG_SGD_STAT_CP_FLAG      (1<<1)
 148 #define   VIA_REG_SGD_STAT_FM_FLAG      (1<<2)
 149 #define   VIA_REG_SGD_STAT_PB_EOL       (1<<4)
 150 #define   VIA_REG_SGD_STAT_CP_EOL       (1<<5)
 151 #define   VIA_REG_SGD_STAT_FM_EOL       (1<<6)
 152 #define   VIA_REG_SGD_STAT_PB_STOP      (1<<8)
 153 #define   VIA_REG_SGD_STAT_CP_STOP      (1<<9)
 154 #define   VIA_REG_SGD_STAT_FM_STOP      (1<<10)
 155 #define   VIA_REG_SGD_STAT_PB_ACTIVE    (1<<12)
 156 #define   VIA_REG_SGD_STAT_CP_ACTIVE    (1<<13)
 157 #define   VIA_REG_SGD_STAT_FM_ACTIVE    (1<<14)
 158 #define   VIA_REG_SGD_STAT_MR_FLAG      (1<<16)
 159 #define   VIA_REG_SGD_STAT_MW_FLAG      (1<<17)
 160 #define   VIA_REG_SGD_STAT_MR_EOL       (1<<20)
 161 #define   VIA_REG_SGD_STAT_MW_EOL       (1<<21)
 162 #define   VIA_REG_SGD_STAT_MR_STOP      (1<<24)
 163 #define   VIA_REG_SGD_STAT_MW_STOP      (1<<25)
 164 #define   VIA_REG_SGD_STAT_MR_ACTIVE    (1<<28)
 165 #define   VIA_REG_SGD_STAT_MW_ACTIVE    (1<<29)
 166
 167 #define VIA_REG_GPI_STATUS              0x88
 168 #define VIA_REG_GPI_INTR                0x8c
 169
 170 #define VIA_TBL_BIT_FLAG        0x40000000
 171 #define VIA_TBL_BIT_EOL         0x80000000
 172
 173 /* pci space */
 174 #define VIA_ACLINK_STAT         0x40
 175 #define  VIA_ACLINK_C11_READY   0x20
 176 #define  VIA_ACLINK_C10_READY   0x10
 177 #define  VIA_ACLINK_C01_READY   0x04 /* secondary codec ready */
 178 #define  VIA_ACLINK_LOWPOWER    0x02 /* low-power state */
 179 #define  VIA_ACLINK_C00_READY   0x01 /* primary codec ready */
 180 #define VIA_ACLINK_CTRL         0x41
 181 #define  VIA_ACLINK_CTRL_ENABLE 0x80 /* 0: disable, 1: enable */
 182 #define  VIA_ACLINK_CTRL_RESET  0x40 /* 0: assert, 1: de-assert */
 183 #define  VIA_ACLINK_CTRL_SYNC   0x20 /* 0: release SYNC, 1: force SYNC hi */
 184 #define  VIA_ACLINK_CTRL_SDO    0x10 /* 0: release SDO, 1: force SDO hi */
 185 #define  VIA_ACLINK_CTRL_VRA    0x08 /* 0: disable VRA, 1: enable VRA */
 186 #define  VIA_ACLINK_CTRL_PCM    0x04 /* 0: disable PCM, 1: enable PCM */
 187 #define  VIA_ACLINK_CTRL_FM     0x02 /* via686 only */
 188 #define  VIA_ACLINK_CTRL_SB     0x01 /* via686 only */
 189 #define  VIA_ACLINK_CTRL_INIT   (VIA_ACLINK_CTRL_ENABLE|\
 190                                  VIA_ACLINK_CTRL_RESET|\
 191                                  VIA_ACLINK_CTRL_PCM)
 192 #define VIA_FUNC_ENABLE         0x42
 193 #define  VIA_FUNC_MIDI_PNP      0x80 /* FIXME: it's 0x40 in the datasheet! */
 194 #define  VIA_FUNC_MIDI_IRQMASK  0x40 /* FIXME: not documented! */
 195 #define  VIA_FUNC_RX2C_WRITE    0x20
 196 #define  VIA_FUNC_SB_FIFO_EMPTY 0x10
 197 #define  VIA_FUNC_ENABLE_GAME   0x08
 198 #define  VIA_FUNC_ENABLE_FM     0x04
 199 #define  VIA_FUNC_ENABLE_MIDI   0x02
 200 #define  VIA_FUNC_ENABLE_SB     0x01
 201 #define VIA_PNP_CONTROL         0x43
 202 #define VIA_MC97_CTRL           0x44
 203 #define  VIA_MC97_CTRL_ENABLE   0x80
 204 #define  VIA_MC97_CTRL_SECONDARY 0x40
 205 #define  VIA_MC97_CTRL_INIT     (VIA_MC97_CTRL_ENABLE|\
 206                                  VIA_MC97_CTRL_SECONDARY)
 207
 208
 209 /*
 210  * pcm stream
 211  */
 212
 213 struct snd_via_sg_table {
 214         unsigned int offset;
 215         unsigned int size;
 216 } ;
 217
 218 #define VIA_TABLE_SIZE  255
 219
 220 struct viadev {
 221         unsigned int reg_offset;
 222         unsigned long port;
 223         int direction;  /* playback = 0, capture = 1 */
 224         struct snd_pcm_substream *substream;
 225         int running;
 226         unsigned int tbl_entries; /* # descriptors */
 227         struct snd_dma_buffer table;
 228         struct snd_via_sg_table *idx_table;
 229         /* for recovery from the unexpected pointer */
 230         unsigned int lastpos;
 231         unsigned int bufsize;
 232         unsigned int bufsize2;
 233 };
 234
 235 enum { TYPE_CARD_VIA82XX_MODEM = 1 };
 236
 237 #define VIA_MAX_MODEM_DEVS      2
 238
 239 struct via82xx_modem {
 240         int irq;
 241
 242         unsigned long port;
 243
 244         unsigned int intr_mask; /* SGD_SHADOW mask to check interrupts */
 245
 246         struct pci_dev *pci;
 247         struct snd_card *card;
 248
 249         unsigned int num_devs;
 250         unsigned int playback_devno, capture_devno;
 251         struct viadev devs[VIA_MAX_MODEM_DEVS];
 252
 253         struct snd_pcm *pcms[2];
 254
 255         struct snd_ac97_bus *ac97_bus;
 256         struct snd_ac97 *ac97;
 257         unsigned int ac97_clock;
 258         unsigned int ac97_secondary;    /* secondary AC'97 codec is present */
 259
 260         spinlock_t reg_lock;
 261         struct snd_info_entry *proc_entry;
 262 };
 263
 264 static struct pci_device_id snd_via82xx_modem_ids[] = {
 265         { 0x1106, 0x3068, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPE_CARD_VIA82XX_MODEM, },
 266         { 0, }
 267 };
 268
 269 MODULE_DEVICE_TABLE(pci, snd_via82xx_modem_ids);
 270
 271 /*
 272  */
 273
 274 /*
 275  * allocate and initialize the descriptor buffers
 276  * periods = number of periods
 277  * fragsize = period size in bytes
 278  */
 279 static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
 280                            struct pci_dev *pci,
 281                            unsigned int periods, unsigned int fragsize)
 282 {
 283         unsigned int i, idx, ofs, rest;
 284         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 285         struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
 286
 287         if (dev->table.area == NULL) {
 288                 /* the start of each lists must be aligned to 8 bytes,
 289                  * but the kernel pages are much bigger, so we don't care
 290                  */
 291                 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
 292                                         PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8),
 293                                         &dev->table) < 0)
 294                         return -ENOMEM;
 295         }
 296         if (! dev->idx_table) {
 297                 dev->idx_table = kmalloc(sizeof(*dev->idx_table) * VIA_TABLE_SIZE, GFP_KERNEL);
 298                 if (! dev->idx_table)
 299                         return -ENOMEM;
 300         }
 301
 302         /* fill the entries */
 303         idx = 0;
 304         ofs = 0;
 305         for (i = 0; i < periods; i++) {
 306                 rest = fragsize;
 307                 /* fill descriptors for a period.
 308                  * a period can be split to several descriptors if it's
 309                  * over page boundary.
 310                  */
 311                 do {
 312                         unsigned int r;
 313                         unsigned int flag;
 314
 315                         if (idx >= VIA_TABLE_SIZE) {
 316                                 snd_printk(KERN_ERR "via82xx: too much table size!\n");
 317                                 return -EINVAL;
 318                         }
 319                         ((u32 *)dev->table.area)[idx << 1] = cpu_to_le32((u32)snd_pcm_sgbuf_get_addr(sgbuf, ofs));
 320                         r = PAGE_SIZE - (ofs % PAGE_SIZE);
 321                         if (rest < r)
 322                                 r = rest;
 323                         rest -= r;
 324                         if (! rest) {
 325                                 if (i == periods - 1)
 326                                         flag = VIA_TBL_BIT_EOL; /* buffer boundary */
 327                                 else
 328                                         flag = VIA_TBL_BIT_FLAG; /* period boundary */
 329                         } else
 330                                 flag = 0; /* period continues to the next */
 331                         // printk("via: tbl %d: at %d  size %d (rest %d)\n", idx, ofs, r, rest);
 332                         ((u32 *)dev->table.area)[(idx<<1) + 1] = cpu_to_le32(r | flag);
 333                         dev->idx_table[idx].offset = ofs;
 334                         dev->idx_table[idx].size = r;
 335                         ofs += r;
 336                         idx++;
 337                 } while (rest > 0);
 338         }
 339         dev->tbl_entries = idx;
 340         dev->bufsize = periods * fragsize;
 341         dev->bufsize2 = dev->bufsize / 2;
 342         return 0;
 343 }
 344
 345
 346 static int clean_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
 347                            struct pci_dev *pci)
 348 {
 349         if (dev->table.area) {
 350                 snd_dma_free_pages(&dev->table);
 351                 dev->table.area = NULL;
 352         }
 353         kfree(dev->idx_table);
 354         dev->idx_table = NULL;
 355         return 0;
 356 }
 357
 358 /*
 359  *  Basic I/O
 360  */
 361
 362 static inline unsigned int snd_via82xx_codec_xread(struct via82xx_modem *chip)
 363 {
 364         return inl(VIAREG(chip, AC97));
 365 }
 366
 367 static inline void snd_via82xx_codec_xwrite(struct via82xx_modem *chip, unsigned int val)
 368 {
 369         outl(val, VIAREG(chip, AC97));
 370 }
 371
 372 static int snd_via82xx_codec_ready(struct via82xx_modem *chip, int secondary)
 373 {
 374         unsigned int timeout = 1000;    /* 1ms */
 375         unsigned int val;
 376
 377         while (timeout-- > 0) {
 378                 udelay(1);
 379                 if (!((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY))
 380                         return val & 0xffff;
 381         }
 382         snd_printk(KERN_ERR "codec_ready: codec %i is not ready [0x%x]\n",
 383                    secondary, snd_via82xx_codec_xread(chip));
 384         return -EIO;
 385 }
 386
 387 static int snd_via82xx_codec_valid(struct via82xx_modem *chip, int secondary)
 388 {
 389         unsigned int timeout = 1000;    /* 1ms */
 390         unsigned int val, val1;
 391         unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
 392                                          VIA_REG_AC97_SECONDARY_VALID;
 393
 394         while (timeout-- > 0) {
 395                 val = snd_via82xx_codec_xread(chip);
 396                 val1 = val & (VIA_REG_AC97_BUSY | stat);
 397                 if (val1 == stat)
 398                         return val & 0xffff;
 399                 udelay(1);
 400         }
 401         return -EIO;
 402 }
 403
 404 static void snd_via82xx_codec_wait(struct snd_ac97 *ac97)
 405 {
 406         struct via82xx_modem *chip = ac97->private_data;
 407         int err;
 408         err = snd_via82xx_codec_ready(chip, ac97->num);
 409         /* here we need to wait fairly for long time.. */
 410         msleep(500);
 411 }
 412
 413 static void snd_via82xx_codec_write(struct snd_ac97 *ac97,
 414                                     unsigned short reg,
 415                                     unsigned short val)
 416 {
 417         struct via82xx_modem *chip = ac97->private_data;
 418         unsigned int xval;
 419         if(reg == AC97_GPIO_STATUS) {
 420                 outl(val, VIAREG(chip, GPI_STATUS));
 421                 return;
 422         }
 423         xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
 424         xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
 425         xval |= reg << VIA_REG_AC97_CMD_SHIFT;
 426         xval |= val << VIA_REG_AC97_DATA_SHIFT;
 427         snd_via82xx_codec_xwrite(chip, xval);
 428         snd_via82xx_codec_ready(chip, ac97->num);
 429 }
 430
 431 static unsigned short snd_via82xx_codec_read(struct snd_ac97 *ac97, unsigned short reg)
 432 {
 433         struct via82xx_modem *chip = ac97->private_data;
 434         unsigned int xval, val = 0xffff;
 435         int again = 0;
 436
 437         xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
 438         xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
 439         xval |= VIA_REG_AC97_READ;
 440         xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
 441         while (1) {
 442                 if (again++ > 3) {
 443                         snd_printk(KERN_ERR "codec_read: codec %i is not valid [0x%x]\n",
 444                                    ac97->num, snd_via82xx_codec_xread(chip));
 445                         return 0xffff;
 446                 }
 447                 snd_via82xx_codec_xwrite(chip, xval);
 448                 udelay (20);
 449                 if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) {
 450                         udelay(25);
 451                         val = snd_via82xx_codec_xread(chip);
 452                         break;
 453                 }
 454         }
 455         return val & 0xffff;
 456 }
 457
 458 static void snd_via82xx_channel_reset(struct via82xx_modem *chip, struct viadev *viadev)
 459 {
 460         outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET,
 461              VIADEV_REG(viadev, OFFSET_CONTROL));
 462         inb(VIADEV_REG(viadev, OFFSET_CONTROL));
 463         udelay(50);
 464         /* disable interrupts */
 465         outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL));
 466         /* clear interrupts */
 467         outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS));
 468         outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */
 469         // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
 470         viadev->lastpos = 0;
 471 }
 472
 473
 474 /*
 475  *  Interrupt handler
 476  */
 477
 478 static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id)
 479 {
 480         struct via82xx_modem *chip = dev_id;
 481         unsigned int status;
 482         unsigned int i;
 483
 484         status = inl(VIAREG(chip, SGD_SHADOW));
 485         if (! (status & chip->intr_mask)) {
 486                 return IRQ_NONE;
 487         }
 488 // _skip_sgd:
 489
 490         /* check status for each stream */
 491         spin_lock(&chip->reg_lock);
 492         for (i = 0; i < chip->num_devs; i++) {
 493                 struct viadev *viadev = &chip->devs[i];
 494                 unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
 495                 c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED);
 496                 if (! c_status)
 497                         continue;
 498                 if (viadev->substream && viadev->running) {
 499                         spin_unlock(&chip->reg_lock);
 500                         snd_pcm_period_elapsed(viadev->substream);
 501                         spin_lock(&chip->reg_lock);
 502                 }
 503                 outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
 504         }
 505         spin_unlock(&chip->reg_lock);
 506         return IRQ_HANDLED;
 507 }
 508
 509 /*
 510  *  PCM callbacks
 511  */
 512
 513 /*
 514  * trigger callback
 515  */
 516 static int snd_via82xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 517 {
 518         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 519         struct viadev *viadev = substream->runtime->private_data;
 520         unsigned char val = 0;
 521
 522         switch (cmd) {
 523         case SNDRV_PCM_TRIGGER_START:
 524         case SNDRV_PCM_TRIGGER_SUSPEND:
 525                 val |= VIA_REG_CTRL_START;
 526                 viadev->running = 1;
 527                 break;
 528         case SNDRV_PCM_TRIGGER_STOP:
 529                 val = VIA_REG_CTRL_TERMINATE;
 530                 viadev->running = 0;
 531                 break;
 532         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 533                 val |= VIA_REG_CTRL_PAUSE;
 534                 viadev->running = 0;
 535                 break;
 536         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 537                 viadev->running = 1;
 538                 break;
 539         default:
 540                 return -EINVAL;
 541         }
 542         outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
 543         if (cmd == SNDRV_PCM_TRIGGER_STOP)
 544                 snd_via82xx_channel_reset(chip, viadev);
 545         return 0;
 546 }
 547
 548 /*
 549  * pointer callbacks
 550  */
 551
 552 /*
 553  * calculate the linear position at the given sg-buffer index and the rest count
 554  */
 555
 556 #define check_invalid_pos(viadev,pos) \
 557         ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 ||\
 558                                      viadev->lastpos < viadev->bufsize2))
 559
 560 static inline unsigned int calc_linear_pos(struct viadev *viadev, unsigned int idx,
 561                                            unsigned int count)
 562 {
 563         unsigned int size, res;
 564
 565         size = viadev->idx_table[idx].size;
 566         res = viadev->idx_table[idx].offset + size - count;
 567
 568         /* check the validity of the calculated position */
 569         if (size < count) {
 570                 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (size = %d, count = %d)\n",
 571                            (int)size, (int)count);
 572                 res = viadev->lastpos;
 573         } else if (check_invalid_pos(viadev, res)) {
 574 #ifdef POINTER_DEBUG
 575                 printk(KERN_DEBUG "fail: idx = %i/%i, lastpos = 0x%x, "
 576                        "bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, "
 577                        "count = 0x%x\n", idx, viadev->tbl_entries, viadev->lastpos,
 578                        viadev->bufsize2, viadev->idx_table[idx].offset,
 579                        viadev->idx_table[idx].size, count);
 580 #endif
 581                 if (count && size < count) {
 582                         snd_printd(KERN_ERR "invalid via82xx_cur_ptr, "
 583                                    "using last valid pointer\n");
 584                         res = viadev->lastpos;
 585                 } else {
 586                         if (! count)
 587                                 /* bogus count 0 on the DMA boundary? */
 588                                 res = viadev->idx_table[idx].offset;
 589                         else
 590                                 /* count register returns full size
 591                                  * when end of buffer is reached
 592                                  */
 593                                 res = viadev->idx_table[idx].offset + size;
 594                         if (check_invalid_pos(viadev, res)) {
 595                                 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (2), "
 596                                            "using last valid pointer\n");
 597                                 res = viadev->lastpos;
 598                         }
 599                 }
 600         }
 601         viadev->lastpos = res; /* remember the last position */
 602         if (res >= viadev->bufsize)
 603                 res -= viadev->bufsize;
 604         return res;
 605 }
 606
 607 /*
 608  * get the current pointer on via686
 609  */
 610 static snd_pcm_uframes_t snd_via686_pcm_pointer(struct snd_pcm_substream *substream)
 611 {
 612         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 613         struct viadev *viadev = substream->runtime->private_data;
 614         unsigned int idx, ptr, count, res;
 615
 616         snd_assert(viadev->tbl_entries, return 0);
 617         if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
 618                 return 0;
 619
 620         spin_lock(&chip->reg_lock);
 621         count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
 622         /* The via686a does not have the current index register,
 623          * so we need to calculate the index from CURR_PTR.
 624          */
 625         ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
 626         if (ptr <= (unsigned int)viadev->table.addr)
 627                 idx = 0;
 628         else /* CURR_PTR holds the address + 8 */
 629                 idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) %
 630                         viadev->tbl_entries;
 631         res = calc_linear_pos(viadev, idx, count);
 632         spin_unlock(&chip->reg_lock);
 633
 634         return bytes_to_frames(substream->runtime, res);
 635 }
 636
 637 /*
 638  * hw_params callback:
 639  * allocate the buffer and build up the buffer description table
 640  */
 641 static int snd_via82xx_hw_params(struct snd_pcm_substream *substream,
 642                                  struct snd_pcm_hw_params *hw_params)
 643 {
 644         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 645         struct viadev *viadev = substream->runtime->private_data;
 646         int err;
 647
 648         err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 649         if (err < 0)
 650                 return err;
 651         err = build_via_table(viadev, substream, chip->pci,
 652                               params_periods(hw_params),
 653                               params_period_bytes(hw_params));
 654         if (err < 0)
 655                 return err;
 656
 657         snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params));
 658         snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0);
 659
 660         return 0;
 661 }
 662
 663 /*
 664  * hw_free callback:
 665  * clean up the buffer description table and release the buffer
 666  */
 667 static int snd_via82xx_hw_free(struct snd_pcm_substream *substream)
 668 {
 669         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 670         struct viadev *viadev = substream->runtime->private_data;
 671
 672         clean_via_table(viadev, substream, chip->pci);
 673         snd_pcm_lib_free_pages(substream);
 674         return 0;
 675 }
 676
 677
 678 /*
 679  * set up the table pointer
 680  */
 681 static void snd_via82xx_set_table_ptr(struct via82xx_modem *chip, struct viadev *viadev)
 682 {
 683         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 684         outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
 685         udelay(20);
 686         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 687 }
 688
 689 /*
 690  * prepare callback for playback and capture
 691  */
 692 static int snd_via82xx_pcm_prepare(struct snd_pcm_substream *substream)
 693 {
 694         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 695         struct viadev *viadev = substream->runtime->private_data;
 696
 697         snd_via82xx_channel_reset(chip, viadev);
 698         /* this must be set after channel_reset */
 699         snd_via82xx_set_table_ptr(chip, viadev);
 700         outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG,
 701              VIADEV_REG(viadev, OFFSET_TYPE));
 702         return 0;
 703 }
 704
 705 /*
 706  * pcm hardware definition, identical for both playback and capture
 707  */
 708 static struct snd_pcm_hardware snd_via82xx_hw =
 709 {
 710         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 711                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 712                                  SNDRV_PCM_INFO_MMAP_VALID |
 713                                  /* SNDRV_PCM_INFO_RESUME | */
 714                                  SNDRV_PCM_INFO_PAUSE),
 715         .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
 716         .rates =                SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
 717         .rate_min =             8000,
 718         .rate_max =             16000,
 719         .channels_min =         1,
 720         .channels_max =         1,
 721         .buffer_bytes_max =     128 * 1024,
 722         .period_bytes_min =     32,
 723         .period_bytes_max =     128 * 1024,
 724         .periods_min =          2,
 725         .periods_max =          VIA_TABLE_SIZE / 2,
 726         .fifo_size =            0,
 727 };
 728
 729
 730 /*
 731  * open callback skeleton
 732  */
 733 static int snd_via82xx_modem_pcm_open(struct via82xx_modem *chip, struct viadev *viadev,
 734                                       struct snd_pcm_substream *substream)
 735 {
 736         struct snd_pcm_runtime *runtime = substream->runtime;
 737         int err;
 738         static unsigned int rates[] = { 8000,  9600, 12000, 16000 };
 739         static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
 740                 .count = ARRAY_SIZE(rates),
 741                 .list = rates,
 742                 .mask = 0,
 743         };
 744
 745         runtime->hw = snd_via82xx_hw;
 746
 747         if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 748                                               &hw_constraints_rates)) < 0)
 749                 return err;
 750
 751         /* we may remove following constaint when we modify table entries
 752            in interrupt */
 753         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 754                 return err;
 755
 756         runtime->private_data = viadev;
 757         viadev->substream = substream;
 758
 759         return 0;
 760 }
 761
 762
 763 /*
 764  * open callback for playback
 765  */
 766 static int snd_via82xx_playback_open(struct snd_pcm_substream *substream)
 767 {
 768         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 769         struct viadev *viadev = &chip->devs[chip->playback_devno + substream->number];
 770
 771         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 772 }
 773
 774 /*
 775  * open callback for capture
 776  */
 777 static int snd_via82xx_capture_open(struct snd_pcm_substream *substream)
 778 {
 779         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 780         struct viadev *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
 781
 782         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 783 }
 784
 785 /*
 786  * close callback
 787  */
 788 static int snd_via82xx_pcm_close(struct snd_pcm_substream *substream)
 789 {
 790         struct viadev *viadev = substream->runtime->private_data;
 791
 792         viadev->substream = NULL;
 793         return 0;
 794 }
 795
 796
 797 /* via686 playback callbacks */
 798 static struct snd_pcm_ops snd_via686_playback_ops = {
 799         .open =         snd_via82xx_playback_open,
 800         .close =        snd_via82xx_pcm_close,
 801         .ioctl =        snd_pcm_lib_ioctl,
 802         .hw_params =    snd_via82xx_hw_params,
 803         .hw_free =      snd_via82xx_hw_free,
 804         .prepare =      snd_via82xx_pcm_prepare,
 805         .trigger =      snd_via82xx_pcm_trigger,
 806         .pointer =      snd_via686_pcm_pointer,
 807         .page =         snd_pcm_sgbuf_ops_page,
 808 };
 809
 810 /* via686 capture callbacks */
 811 static struct snd_pcm_ops snd_via686_capture_ops = {
 812         .open =         snd_via82xx_capture_open,
 813         .close =        snd_via82xx_pcm_close,
 814         .ioctl =        snd_pcm_lib_ioctl,
 815         .hw_params =    snd_via82xx_hw_params,
 816         .hw_free =      snd_via82xx_hw_free,
 817         .prepare =      snd_via82xx_pcm_prepare,
 818         .trigger =      snd_via82xx_pcm_trigger,
 819         .pointer =      snd_via686_pcm_pointer,
 820         .page =         snd_pcm_sgbuf_ops_page,
 821 };
 822
 823
 824 static void init_viadev(struct via82xx_modem *chip, int idx, unsigned int reg_offset,
 825                         int direction)
 826 {
 827         chip->devs[idx].reg_offset = reg_offset;
 828         chip->devs[idx].direction = direction;
 829         chip->devs[idx].port = chip->port + reg_offset;
 830 }
 831
 832 /*
 833  * create a pcm instance for via686a/b
 834  */
 835 static int __devinit snd_via686_pcm_new(struct via82xx_modem *chip)
 836 {
 837         struct snd_pcm *pcm;
 838         int err;
 839
 840         chip->playback_devno = 0;
 841         chip->capture_devno = 1;
 842         chip->num_devs = 2;
 843         chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */
 844
 845         err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
 846         if (err < 0)
 847                 return err;
 848         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
 849         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
 850         pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
 851         pcm->private_data = chip;
 852         strcpy(pcm->name, chip->card->shortname);
 853         chip->pcms[0] = pcm;
 854         init_viadev(chip, 0, VIA_REG_MO_STATUS, 0);
 855         init_viadev(chip, 1, VIA_REG_MI_STATUS, 1);
 856
 857         if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
 858                                                          snd_dma_pci_data(chip->pci),
 859                                                          64*1024, 128*1024)) < 0)
 860                 return err;
 861
 862         return 0;
 863 }
 864
 865
 866 /*
 867  *  Mixer part
 868  */
 869
 870
 871 static void snd_via82xx_mixer_free_ac97_bus(struct snd_ac97_bus *bus)
 872 {
 873         struct via82xx_modem *chip = bus->private_data;
 874         chip->ac97_bus = NULL;
 875 }
 876
 877 static void snd_via82xx_mixer_free_ac97(struct snd_ac97 *ac97)
 878 {
 879         struct via82xx_modem *chip = ac97->private_data;
 880         chip->ac97 = NULL;
 881 }
 882
 883
 884 static int __devinit snd_via82xx_mixer_new(struct via82xx_modem *chip)
 885 {
 886         struct snd_ac97_template ac97;
 887         int err;
 888         static struct snd_ac97_bus_ops ops = {
 889                 .write = snd_via82xx_codec_write,
 890                 .read = snd_via82xx_codec_read,
 891                 .wait = snd_via82xx_codec_wait,
 892         };
 893
 894         if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
 895                 return err;
 896         chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
 897         chip->ac97_bus->clock = chip->ac97_clock;
 898
 899         memset(&ac97, 0, sizeof(ac97));
 900         ac97.private_data = chip;
 901         ac97.private_free = snd_via82xx_mixer_free_ac97;
 902         ac97.pci = chip->pci;
 903         ac97.scaps = AC97_SCAP_SKIP_AUDIO;
 904         ac97.num = chip->ac97_secondary;
 905
 906         if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
 907                 return err;
 908
 909         return 0;
 910 }
 911
 912
 913 /*
 914  * proc interface
 915  */
 916 static void snd_via82xx_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
 917 {
 918         struct via82xx_modem *chip = entry->private_data;
 919         int i;
 920
 921         snd_iprintf(buffer, "%s\n\n", chip->card->longname);
 922         for (i = 0; i < 0xa0; i += 4) {
 923                 snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
 924         }
 925 }
 926
 927 static void __devinit snd_via82xx_proc_init(struct via82xx_modem *chip)
 928 {
 929         struct snd_info_entry *entry;
 930
 931         if (! snd_card_proc_new(chip->card, "via82xx", &entry))
 932                 snd_info_set_text_ops(entry, chip, snd_via82xx_proc_read);
 933 }
 934
 935 /*
 936  *
 937  */
 938
 939 static int snd_via82xx_chip_init(struct via82xx_modem *chip)
 940 {
 941         unsigned int val;
 942         unsigned long end_time;
 943         unsigned char pval;
 944
 945         pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval);
 946         if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) {
 947                 pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT);
 948                 udelay(100);
 949         }
 950
 951         pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 952         if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
 953                 /* deassert ACLink reset, force SYNC */
 954                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 955                                       VIA_ACLINK_CTRL_ENABLE |
 956                                       VIA_ACLINK_CTRL_RESET |
 957                                       VIA_ACLINK_CTRL_SYNC);
 958                 udelay(100);
 959 #if 1 /* FIXME: should we do full reset here for all chip models? */
 960                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
 961                 udelay(100);
 962 #else
 963                 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
 964                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 965                                       VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
 966                 udelay(2);
 967 #endif
 968                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 969                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 970                 udelay(100);
 971         }
 972
 973         pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
 974         if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
 975                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 976                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 977                 udelay(100);
 978         }
 979
 980         /* wait until codec ready */
 981         end_time = jiffies + msecs_to_jiffies(750);
 982         do {
 983                 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 984                 if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
 985                         break;
 986                 schedule_timeout_uninterruptible(1);
 987         } while (time_before(jiffies, end_time));
 988
 989         if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)
 990                 snd_printk(KERN_ERR "AC'97 codec is not ready [0x%x]\n", val);
 991
 992         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
 993                                  VIA_REG_AC97_SECONDARY_VALID |
 994                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
 995         end_time = jiffies + msecs_to_jiffies(750);
 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         do {
1000                 if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) {
1001                         chip->ac97_secondary = 1;
1002                         goto __ac97_ok2;
1003                 }
1004                 schedule_timeout_interruptible(1);
1005         } while (time_before(jiffies, end_time));
1006         /* This is ok, the most of motherboards have only one codec */
1007
1008       __ac97_ok2:
1009
1010         /* route FM trap to IRQ, disable FM trap */
1011         // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
1012         /* disable all GPI interrupts */
1013         outl(0, VIAREG(chip, GPI_INTR));
1014
1015         return 0;
1016 }
1017
1018 #ifdef CONFIG_PM
1019 /*
1020  * power management
1021  */
1022 static int snd_via82xx_suspend(struct pci_dev *pci, pm_message_t state)
1023 {
1024         struct snd_card *card = pci_get_drvdata(pci);
1025         struct via82xx_modem *chip = card->private_data;
1026         int i;
1027
1028         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1029         for (i = 0; i < 2; i++)
1030                 snd_pcm_suspend_all(chip->pcms[i]);
1031         for (i = 0; i < chip->num_devs; i++)
1032                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1033         synchronize_irq(chip->irq);
1034         snd_ac97_suspend(chip->ac97);
1035
1036         pci_disable_device(pci);
1037         pci_save_state(pci);
1038         pci_set_power_state(pci, pci_choose_state(pci, state));
1039         return 0;
1040 }
1041
1042 static int snd_via82xx_resume(struct pci_dev *pci)
1043 {
1044         struct snd_card *card = pci_get_drvdata(pci);
1045         struct via82xx_modem *chip = card->private_data;
1046         int i;
1047
1048         pci_set_power_state(pci, PCI_D0);
1049         pci_restore_state(pci);
1050         if (pci_enable_device(pci) < 0) {
1051                 printk(KERN_ERR "via82xx-modem: pci_enable_device failed, "
1052                        "disabling device\n");
1053                 snd_card_disconnect(card);
1054                 return -EIO;
1055         }
1056         pci_set_master(pci);
1057
1058         snd_via82xx_chip_init(chip);
1059
1060         snd_ac97_resume(chip->ac97);
1061
1062         for (i = 0; i < chip->num_devs; i++)
1063                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1064
1065         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1066         return 0;
1067 }
1068 #endif /* CONFIG_PM */
1069
1070 static int snd_via82xx_free(struct via82xx_modem *chip)
1071 {
1072         unsigned int i;
1073
1074         if (chip->irq < 0)
1075                 goto __end_hw;
1076         /* disable interrupts */
1077         for (i = 0; i < chip->num_devs; i++)
1078                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1079         synchronize_irq(chip->irq);
1080       __end_hw:
1081         if (chip->irq >= 0)
1082                 free_irq(chip->irq, chip);
1083         pci_release_regions(chip->pci);
1084         pci_disable_device(chip->pci);
1085         kfree(chip);
1086         return 0;
1087 }
1088
1089 static int snd_via82xx_dev_free(struct snd_device *device)
1090 {
1091         struct via82xx_modem *chip = device->device_data;
1092         return snd_via82xx_free(chip);
1093 }
1094
1095 static int __devinit snd_via82xx_create(struct snd_card *card,
1096                                         struct pci_dev *pci,
1097                                         int chip_type,
1098                                         int revision,
1099                                         unsigned int ac97_clock,
1100                                         struct via82xx_modem ** r_via)
1101 {
1102         struct via82xx_modem *chip;
1103         int err;
1104         static struct snd_device_ops ops = {
1105                 .dev_free =     snd_via82xx_dev_free,
1106         };
1107
1108         if ((err = pci_enable_device(pci)) < 0)
1109                 return err;
1110
1111         if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) {
1112                 pci_disable_device(pci);
1113                 return -ENOMEM;
1114         }
1115
1116         spin_lock_init(&chip->reg_lock);
1117         chip->card = card;
1118         chip->pci = pci;
1119         chip->irq = -1;
1120
1121         if ((err = pci_request_regions(pci, card->driver)) < 0) {
1122                 kfree(chip);
1123                 pci_disable_device(pci);
1124                 return err;
1125         }
1126         chip->port = pci_resource_start(pci, 0);
1127         if (request_irq(pci->irq, snd_via82xx_interrupt, IRQF_DISABLED|IRQF_SHARED,
1128                         card->driver, chip)) {
1129                 snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
1130                 snd_via82xx_free(chip);
1131                 return -EBUSY;
1132         }
1133         chip->irq = pci->irq;
1134         if (ac97_clock >= 8000 && ac97_clock <= 48000)
1135                 chip->ac97_clock = ac97_clock;
1136         synchronize_irq(chip->irq);
1137
1138         if ((err = snd_via82xx_chip_init(chip)) < 0) {
1139                 snd_via82xx_free(chip);
1140                 return err;
1141         }
1142
1143         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1144                 snd_via82xx_free(chip);
1145                 return err;
1146         }
1147
1148         /* The 8233 ac97 controller does not implement the master bit
1149          * in the pci command register. IMHO this is a violation of the PCI spec.
1150          * We call pci_set_master here because it does not hurt. */
1151         pci_set_master(pci);
1152
1153         snd_card_set_dev(card, &pci->dev);
1154
1155         *r_via = chip;
1156         return 0;
1157 }
1158
1159
1160 static int __devinit snd_via82xx_probe(struct pci_dev *pci,
1161                                        const struct pci_device_id *pci_id)
1162 {
1163         struct snd_card *card;
1164         struct via82xx_modem *chip;
1165         unsigned char revision;
1166         int chip_type = 0, card_type;
1167         unsigned int i;
1168         int err;
1169
1170         card = snd_card_new(index, id, THIS_MODULE, 0);
1171         if (card == NULL)
1172                 return -ENOMEM;
1173
1174         card_type = pci_id->driver_data;
1175         pci_read_config_byte(pci, PCI_REVISION_ID, &revision);
1176         switch (card_type) {
1177         case TYPE_CARD_VIA82XX_MODEM:
1178                 strcpy(card->driver, "VIA82XX-MODEM");
1179                 sprintf(card->shortname, "VIA 82XX modem");
1180                 break;
1181         default:
1182                 snd_printk(KERN_ERR "invalid card type %d\n", card_type);
1183                 err = -EINVAL;
1184                 goto __error;
1185         }
1186
1187         if ((err = snd_via82xx_create(card, pci, chip_type, revision,
1188                                       ac97_clock, &chip)) < 0)
1189                 goto __error;
1190         card->private_data = chip;
1191         if ((err = snd_via82xx_mixer_new(chip)) < 0)
1192                 goto __error;
1193
1194         if ((err = snd_via686_pcm_new(chip)) < 0 )
1195                 goto __error;
1196
1197         /* disable interrupts */
1198         for (i = 0; i < chip->num_devs; i++)
1199                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1200
1201         sprintf(card->longname, "%s at 0x%lx, irq %d",
1202                 card->shortname, chip->port, chip->irq);
1203
1204         snd_via82xx_proc_init(chip);
1205
1206         if ((err = snd_card_register(card)) < 0) {
1207                 snd_card_free(card);
1208                 return err;
1209         }
1210         pci_set_drvdata(pci, card);
1211         return 0;
1212
1213  __error:
1214         snd_card_free(card);
1215         return err;
1216 }
1217
1218 static void __devexit snd_via82xx_remove(struct pci_dev *pci)
1219 {
1220         snd_card_free(pci_get_drvdata(pci));
1221         pci_set_drvdata(pci, NULL);
1222 }
1223
1224 static struct pci_driver driver = {
1225         .name = "VIA 82xx Modem",
1226         .id_table = snd_via82xx_modem_ids,
1227         .probe = snd_via82xx_probe,
1228         .remove = __devexit_p(snd_via82xx_remove),
1229 #ifdef CONFIG_PM
1230         .suspend = snd_via82xx_suspend,
1231         .resume = snd_via82xx_resume,
1232 #endif
1233 };
1234
1235 static int __init alsa_card_via82xx_init(void)
1236 {
1237         return pci_register_driver(&driver);
1238 }
1239
1240 static void __exit alsa_card_via82xx_exit(void)
1241 {
1242         pci_unregister_driver(&driver);
1243 }
1244
1245 module_init(alsa_card_via82xx_init)
1246 module_exit(alsa_card_via82xx_exit)