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@smlink.com>
  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[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -2}; /* Exclude the first card */
  59 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  60 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;      /* Enable this card */
  61 static int ac97_clock[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 48000};
  62
  63 module_param_array(index, int, NULL, 0444);
  64 MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge.");
  65 module_param_array(id, charp, NULL, 0444);
  66 MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge.");
  67 module_param_array(enable, bool, NULL, 0444);
  68 MODULE_PARM_DESC(enable, "Enable modem part of VIA 82xx bridge.");
  69 module_param_array(ac97_clock, int, NULL, 0444);
  70 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
  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 typedef struct _snd_via82xx_modem via82xx_t;
 209 typedef struct via_dev viadev_t;
 210
 211 /*
 212  * pcm stream
 213  */
 214
 215 struct snd_via_sg_table {
 216         unsigned int offset;
 217         unsigned int size;
 218 } ;
 219
 220 #define VIA_TABLE_SIZE  255
 221
 222 struct via_dev {
 223         unsigned int reg_offset;
 224         unsigned long port;
 225         int direction;  /* playback = 0, capture = 1 */
 226         snd_pcm_substream_t *substream;
 227         int running;
 228         unsigned int tbl_entries; /* # descriptors */
 229         struct snd_dma_buffer table;
 230         struct snd_via_sg_table *idx_table;
 231         /* for recovery from the unexpected pointer */
 232         unsigned int lastpos;
 233         unsigned int bufsize;
 234         unsigned int bufsize2;
 235 };
 236
 237 enum { TYPE_CARD_VIA82XX_MODEM = 1 };
 238
 239 #define VIA_MAX_MODEM_DEVS      2
 240
 241 struct _snd_via82xx_modem {
 242         int irq;
 243
 244         unsigned long port;
 245
 246         unsigned int intr_mask; /* SGD_SHADOW mask to check interrupts */
 247
 248         struct pci_dev *pci;
 249         snd_card_t *card;
 250
 251         unsigned int num_devs;
 252         unsigned int playback_devno, capture_devno;
 253         viadev_t devs[VIA_MAX_MODEM_DEVS];
 254
 255         snd_pcm_t *pcms[2];
 256
 257         ac97_bus_t *ac97_bus;
 258         ac97_t *ac97;
 259         unsigned int ac97_clock;
 260         unsigned int ac97_secondary;    /* secondary AC'97 codec is present */
 261
 262         spinlock_t reg_lock;
 263         snd_info_entry_t *proc_entry;
 264 };
 265
 266 static struct pci_device_id snd_via82xx_modem_ids[] = {
 267         { 0x1106, 0x3068, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPE_CARD_VIA82XX_MODEM, },
 268         { 0, }
 269 };
 270
 271 MODULE_DEVICE_TABLE(pci, snd_via82xx_modem_ids);
 272
 273 /*
 274  */
 275
 276 /*
 277  * allocate and initialize the descriptor buffers
 278  * periods = number of periods
 279  * fragsize = period size in bytes
 280  */
 281 static int build_via_table(viadev_t *dev, snd_pcm_substream_t *substream,
 282                            struct pci_dev *pci,
 283                            unsigned int periods, unsigned int fragsize)
 284 {
 285         unsigned int i, idx, ofs, rest;
 286         via82xx_t *chip = snd_pcm_substream_chip(substream);
 287         struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
 288
 289         if (dev->table.area == NULL) {
 290                 /* the start of each lists must be aligned to 8 bytes,
 291                  * but the kernel pages are much bigger, so we don't care
 292                  */
 293                 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
 294                                         PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8),
 295                                         &dev->table) < 0)
 296                         return -ENOMEM;
 297         }
 298         if (! dev->idx_table) {
 299                 dev->idx_table = kmalloc(sizeof(*dev->idx_table) * VIA_TABLE_SIZE, GFP_KERNEL);
 300                 if (! dev->idx_table)
 301                         return -ENOMEM;
 302         }
 303
 304         /* fill the entries */
 305         idx = 0;
 306         ofs = 0;
 307         for (i = 0; i < periods; i++) {
 308                 rest = fragsize;
 309                 /* fill descriptors for a period.
 310                  * a period can be split to several descriptors if it's
 311                  * over page boundary.
 312                  */
 313                 do {
 314                         unsigned int r;
 315                         unsigned int flag;
 316
 317                         if (idx >= VIA_TABLE_SIZE) {
 318                                 snd_printk(KERN_ERR "via82xx: too much table size!\n");
 319                                 return -EINVAL;
 320                         }
 321                         ((u32 *)dev->table.area)[idx << 1] = cpu_to_le32((u32)snd_pcm_sgbuf_get_addr(sgbuf, ofs));
 322                         r = PAGE_SIZE - (ofs % PAGE_SIZE);
 323                         if (rest < r)
 324                                 r = rest;
 325                         rest -= r;
 326                         if (! rest) {
 327                                 if (i == periods - 1)
 328                                         flag = VIA_TBL_BIT_EOL; /* buffer boundary */
 329                                 else
 330                                         flag = VIA_TBL_BIT_FLAG; /* period boundary */
 331                         } else
 332                                 flag = 0; /* period continues to the next */
 333                         // printk("via: tbl %d: at %d  size %d (rest %d)\n", idx, ofs, r, rest);
 334                         ((u32 *)dev->table.area)[(idx<<1) + 1] = cpu_to_le32(r | flag);
 335                         dev->idx_table[idx].offset = ofs;
 336                         dev->idx_table[idx].size = r;
 337                         ofs += r;
 338                         idx++;
 339                 } while (rest > 0);
 340         }
 341         dev->tbl_entries = idx;
 342         dev->bufsize = periods * fragsize;
 343         dev->bufsize2 = dev->bufsize / 2;
 344         return 0;
 345 }
 346
 347
 348 static int clean_via_table(viadev_t *dev, snd_pcm_substream_t *substream,
 349                            struct pci_dev *pci)
 350 {
 351         if (dev->table.area) {
 352                 snd_dma_free_pages(&dev->table);
 353                 dev->table.area = NULL;
 354         }
 355         kfree(dev->idx_table);
 356         dev->idx_table = NULL;
 357         return 0;
 358 }
 359
 360 /*
 361  *  Basic I/O
 362  */
 363
 364 static inline unsigned int snd_via82xx_codec_xread(via82xx_t *chip)
 365 {
 366         return inl(VIAREG(chip, AC97));
 367 }
 368
 369 static inline void snd_via82xx_codec_xwrite(via82xx_t *chip, unsigned int val)
 370 {
 371         outl(val, VIAREG(chip, AC97));
 372 }
 373
 374 static int snd_via82xx_codec_ready(via82xx_t *chip, int secondary)
 375 {
 376         unsigned int timeout = 1000;    /* 1ms */
 377         unsigned int val;
 378
 379         while (timeout-- > 0) {
 380                 udelay(1);
 381                 if (!((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY))
 382                         return val & 0xffff;
 383         }
 384         snd_printk(KERN_ERR "codec_ready: codec %i is not ready [0x%x]\n", secondary, snd_via82xx_codec_xread(chip));
 385         return -EIO;
 386 }
 387
 388 static int snd_via82xx_codec_valid(via82xx_t *chip, int secondary)
 389 {
 390         unsigned int timeout = 1000;    /* 1ms */
 391         unsigned int val, val1;
 392         unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
 393                                          VIA_REG_AC97_SECONDARY_VALID;
 394
 395         while (timeout-- > 0) {
 396                 val = snd_via82xx_codec_xread(chip);
 397                 val1 = val & (VIA_REG_AC97_BUSY | stat);
 398                 if (val1 == stat)
 399                         return val & 0xffff;
 400                 udelay(1);
 401         }
 402         return -EIO;
 403 }
 404
 405 static void snd_via82xx_codec_wait(ac97_t *ac97)
 406 {
 407         via82xx_t *chip = ac97->private_data;
 408         int err;
 409         err = snd_via82xx_codec_ready(chip, ac97->num);
 410         /* here we need to wait fairly for long time.. */
 411         msleep(500);
 412 }
 413
 414 static void snd_via82xx_codec_write(ac97_t *ac97,
 415                                     unsigned short reg,
 416                                     unsigned short val)
 417 {
 418         via82xx_t *chip = ac97->private_data;
 419         unsigned int xval;
 420         if(reg == AC97_GPIO_STATUS) {
 421                 outl(val, VIAREG(chip, GPI_STATUS));
 422                 return;
 423         }
 424         xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
 425         xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
 426         xval |= reg << VIA_REG_AC97_CMD_SHIFT;
 427         xval |= val << VIA_REG_AC97_DATA_SHIFT;
 428         snd_via82xx_codec_xwrite(chip, xval);
 429         snd_via82xx_codec_ready(chip, ac97->num);
 430 }
 431
 432 static unsigned short snd_via82xx_codec_read(ac97_t *ac97, unsigned short reg)
 433 {
 434         via82xx_t *chip = ac97->private_data;
 435         unsigned int xval, val = 0xffff;
 436         int again = 0;
 437
 438         xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
 439         xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
 440         xval |= VIA_REG_AC97_READ;
 441         xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
 442         while (1) {
 443                 if (again++ > 3) {
 444                         snd_printk(KERN_ERR "codec_read: codec %i is not valid [0x%x]\n", 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(via82xx_t *chip, viadev_t *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, struct pt_regs *regs)
 479 {
 480         via82xx_t *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                 viadev_t *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(snd_pcm_substream_t * substream, int cmd)
 517 {
 518         via82xx_t *chip = snd_pcm_substream_chip(substream);
 519         viadev_t *viadev = (viadev_t *)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 || viadev->lastpos < viadev->bufsize2))
 558
 559 static inline unsigned int calc_linear_pos(viadev_t *viadev, unsigned int idx, unsigned int count)
 560 {
 561         unsigned int size, res;
 562
 563         size = viadev->idx_table[idx].size;
 564         res = viadev->idx_table[idx].offset + size - count;
 565
 566         /* check the validity of the calculated position */
 567         if (size < count) {
 568                 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (size = %d, count = %d)\n", (int)size, (int)count);
 569                 res = viadev->lastpos;
 570         } else if (check_invalid_pos(viadev, res)) {
 571 #ifdef POINTER_DEBUG
 572                 printk("fail: idx = %i/%i, lastpos = 0x%x, bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, count = 0x%x\n", idx, viadev->tbl_entries, viadev->lastpos, viadev->bufsize2, viadev->idx_table[idx].offset, viadev->idx_table[idx].size, count);
 573 #endif
 574                 if (count && size < count) {
 575                         snd_printd(KERN_ERR "invalid via82xx_cur_ptr, using last valid pointer\n");
 576                         res = viadev->lastpos;
 577                 } else {
 578                         if (! count)
 579                                 /* bogus count 0 on the DMA boundary? */
 580                                 res = viadev->idx_table[idx].offset;
 581                         else
 582                                 /* count register returns full size when end of buffer is reached */
 583                                 res = viadev->idx_table[idx].offset + size;
 584                         if (check_invalid_pos(viadev, res)) {
 585                                 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (2), using last valid pointer\n");
 586                                 res = viadev->lastpos;
 587                         }
 588                 }
 589         }
 590         viadev->lastpos = res; /* remember the last position */
 591         if (res >= viadev->bufsize)
 592                 res -= viadev->bufsize;
 593         return res;
 594 }
 595
 596 /*
 597  * get the current pointer on via686
 598  */
 599 static snd_pcm_uframes_t snd_via686_pcm_pointer(snd_pcm_substream_t *substream)
 600 {
 601         via82xx_t *chip = snd_pcm_substream_chip(substream);
 602         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 603         unsigned int idx, ptr, count, res;
 604
 605         snd_assert(viadev->tbl_entries, return 0);
 606         if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
 607                 return 0;
 608
 609         spin_lock(&chip->reg_lock);
 610         count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
 611         /* The via686a does not have the current index register,
 612          * so we need to calculate the index from CURR_PTR.
 613          */
 614         ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
 615         if (ptr <= (unsigned int)viadev->table.addr)
 616                 idx = 0;
 617         else /* CURR_PTR holds the address + 8 */
 618                 idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) % viadev->tbl_entries;
 619         res = calc_linear_pos(viadev, idx, count);
 620         spin_unlock(&chip->reg_lock);
 621
 622         return bytes_to_frames(substream->runtime, res);
 623 }
 624
 625 /*
 626  * hw_params callback:
 627  * allocate the buffer and build up the buffer description table
 628  */
 629 static int snd_via82xx_hw_params(snd_pcm_substream_t * substream,
 630                                  snd_pcm_hw_params_t * hw_params)
 631 {
 632         via82xx_t *chip = snd_pcm_substream_chip(substream);
 633         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 634         int err;
 635
 636         err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 637         if (err < 0)
 638                 return err;
 639         err = build_via_table(viadev, substream, chip->pci,
 640                               params_periods(hw_params),
 641                               params_period_bytes(hw_params));
 642         if (err < 0)
 643                 return err;
 644
 645         snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params));
 646         snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0);
 647
 648         return 0;
 649 }
 650
 651 /*
 652  * hw_free callback:
 653  * clean up the buffer description table and release the buffer
 654  */
 655 static int snd_via82xx_hw_free(snd_pcm_substream_t * substream)
 656 {
 657         via82xx_t *chip = snd_pcm_substream_chip(substream);
 658         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 659
 660         clean_via_table(viadev, substream, chip->pci);
 661         snd_pcm_lib_free_pages(substream);
 662         return 0;
 663 }
 664
 665
 666 /*
 667  * set up the table pointer
 668  */
 669 static void snd_via82xx_set_table_ptr(via82xx_t *chip, viadev_t *viadev)
 670 {
 671         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 672         outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
 673         udelay(20);
 674         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 675 }
 676
 677 /*
 678  * prepare callback for playback and capture
 679  */
 680 static int snd_via82xx_pcm_prepare(snd_pcm_substream_t *substream)
 681 {
 682         via82xx_t *chip = snd_pcm_substream_chip(substream);
 683         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 684
 685         snd_via82xx_channel_reset(chip, viadev);
 686         /* this must be set after channel_reset */
 687         snd_via82xx_set_table_ptr(chip, viadev);
 688         outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG,
 689              VIADEV_REG(viadev, OFFSET_TYPE));
 690         return 0;
 691 }
 692
 693 /*
 694  * pcm hardware definition, identical for both playback and capture
 695  */
 696 static snd_pcm_hardware_t snd_via82xx_hw =
 697 {
 698         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 699                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 700                                  SNDRV_PCM_INFO_MMAP_VALID |
 701                                  /* SNDRV_PCM_INFO_RESUME | */
 702                                  SNDRV_PCM_INFO_PAUSE),
 703         .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
 704         .rates =                SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
 705         .rate_min =             8000,
 706         .rate_max =             16000,
 707         .channels_min =         1,
 708         .channels_max =         1,
 709         .buffer_bytes_max =     128 * 1024,
 710         .period_bytes_min =     32,
 711         .period_bytes_max =     128 * 1024,
 712         .periods_min =          2,
 713         .periods_max =          VIA_TABLE_SIZE / 2,
 714         .fifo_size =            0,
 715 };
 716
 717
 718 /*
 719  * open callback skeleton
 720  */
 721 static int snd_via82xx_modem_pcm_open(via82xx_t *chip, viadev_t *viadev, snd_pcm_substream_t * substream)
 722 {
 723         snd_pcm_runtime_t *runtime = substream->runtime;
 724         int err;
 725         static unsigned int rates[] = { 8000,  9600, 12000, 16000 };
 726         static snd_pcm_hw_constraint_list_t hw_constraints_rates = {
 727                 .count = ARRAY_SIZE(rates),
 728                 .list = rates,
 729                 .mask = 0,
 730         };
 731
 732         runtime->hw = snd_via82xx_hw;
 733
 734         if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates)) < 0)
 735                 return err;
 736
 737         /* we may remove following constaint when we modify table entries
 738            in interrupt */
 739         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 740                 return err;
 741
 742         runtime->private_data = viadev;
 743         viadev->substream = substream;
 744
 745         return 0;
 746 }
 747
 748
 749 /*
 750  * open callback for playback
 751  */
 752 static int snd_via82xx_playback_open(snd_pcm_substream_t * substream)
 753 {
 754         via82xx_t *chip = snd_pcm_substream_chip(substream);
 755         viadev_t *viadev = &chip->devs[chip->playback_devno + substream->number];
 756
 757         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 758 }
 759
 760 /*
 761  * open callback for capture
 762  */
 763 static int snd_via82xx_capture_open(snd_pcm_substream_t * substream)
 764 {
 765         via82xx_t *chip = snd_pcm_substream_chip(substream);
 766         viadev_t *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
 767
 768         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 769 }
 770
 771 /*
 772  * close callback
 773  */
 774 static int snd_via82xx_pcm_close(snd_pcm_substream_t * substream)
 775 {
 776         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 777
 778         viadev->substream = NULL;
 779         return 0;
 780 }
 781
 782
 783 /* via686 playback callbacks */
 784 static snd_pcm_ops_t snd_via686_playback_ops = {
 785         .open =         snd_via82xx_playback_open,
 786         .close =        snd_via82xx_pcm_close,
 787         .ioctl =        snd_pcm_lib_ioctl,
 788         .hw_params =    snd_via82xx_hw_params,
 789         .hw_free =      snd_via82xx_hw_free,
 790         .prepare =      snd_via82xx_pcm_prepare,
 791         .trigger =      snd_via82xx_pcm_trigger,
 792         .pointer =      snd_via686_pcm_pointer,
 793         .page =         snd_pcm_sgbuf_ops_page,
 794 };
 795
 796 /* via686 capture callbacks */
 797 static snd_pcm_ops_t snd_via686_capture_ops = {
 798         .open =         snd_via82xx_capture_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
 810 static void init_viadev(via82xx_t *chip, int idx, unsigned int reg_offset, int direction)
 811 {
 812         chip->devs[idx].reg_offset = reg_offset;
 813         chip->devs[idx].direction = direction;
 814         chip->devs[idx].port = chip->port + reg_offset;
 815 }
 816
 817 /*
 818  * create a pcm instance for via686a/b
 819  */
 820 static int __devinit snd_via686_pcm_new(via82xx_t *chip)
 821 {
 822         snd_pcm_t *pcm;
 823         int err;
 824
 825         chip->playback_devno = 0;
 826         chip->capture_devno = 1;
 827         chip->num_devs = 2;
 828         chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */
 829
 830         err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
 831         if (err < 0)
 832                 return err;
 833         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
 834         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
 835         pcm->private_data = chip;
 836         strcpy(pcm->name, chip->card->shortname);
 837         chip->pcms[0] = pcm;
 838         init_viadev(chip, 0, VIA_REG_MO_STATUS, 0);
 839         init_viadev(chip, 1, VIA_REG_MI_STATUS, 1);
 840
 841         if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
 842                                                          snd_dma_pci_data(chip->pci), 64*1024, 128*1024)) < 0)
 843                 return err;
 844
 845         return 0;
 846 }
 847
 848
 849 /*
 850  *  Mixer part
 851  */
 852
 853
 854 static void snd_via82xx_mixer_free_ac97_bus(ac97_bus_t *bus)
 855 {
 856         via82xx_t *chip = bus->private_data;
 857         chip->ac97_bus = NULL;
 858 }
 859
 860 static void snd_via82xx_mixer_free_ac97(ac97_t *ac97)
 861 {
 862         via82xx_t *chip = ac97->private_data;
 863         chip->ac97 = NULL;
 864 }
 865
 866
 867 static int __devinit snd_via82xx_mixer_new(via82xx_t *chip)
 868 {
 869         ac97_template_t ac97;
 870         int err;
 871         static ac97_bus_ops_t ops = {
 872                 .write = snd_via82xx_codec_write,
 873                 .read = snd_via82xx_codec_read,
 874                 .wait = snd_via82xx_codec_wait,
 875         };
 876
 877         if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
 878                 return err;
 879         chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
 880         chip->ac97_bus->clock = chip->ac97_clock;
 881         chip->ac97_bus->shared_type = AC97_SHARED_TYPE_VIA;
 882
 883         memset(&ac97, 0, sizeof(ac97));
 884         ac97.private_data = chip;
 885         ac97.private_free = snd_via82xx_mixer_free_ac97;
 886         ac97.pci = chip->pci;
 887         ac97.scaps = AC97_SCAP_SKIP_AUDIO;
 888         ac97.num = chip->ac97_secondary;
 889
 890         if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
 891                 return err;
 892
 893         return 0;
 894 }
 895
 896
 897 /*
 898  * proc interface
 899  */
 900 static void snd_via82xx_proc_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
 901 {
 902         via82xx_t *chip = entry->private_data;
 903         int i;
 904
 905         snd_iprintf(buffer, "%s\n\n", chip->card->longname);
 906         for (i = 0; i < 0xa0; i += 4) {
 907                 snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
 908         }
 909 }
 910
 911 static void __devinit snd_via82xx_proc_init(via82xx_t *chip)
 912 {
 913         snd_info_entry_t *entry;
 914
 915         if (! snd_card_proc_new(chip->card, "via82xx", &entry))
 916                 snd_info_set_text_ops(entry, chip, 1024, snd_via82xx_proc_read);
 917 }
 918
 919 /*
 920  *
 921  */
 922
 923 static int snd_via82xx_chip_init(via82xx_t *chip)
 924 {
 925         unsigned int val;
 926         unsigned long end_time;
 927         unsigned char pval;
 928
 929         pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval);
 930         if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) {
 931                 pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT);
 932                 udelay(100);
 933         }
 934
 935         pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 936         if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
 937                 /* deassert ACLink reset, force SYNC */
 938                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 939                                       VIA_ACLINK_CTRL_ENABLE |
 940                                       VIA_ACLINK_CTRL_RESET |
 941                                       VIA_ACLINK_CTRL_SYNC);
 942                 udelay(100);
 943 #if 1 /* FIXME: should we do full reset here for all chip models? */
 944                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
 945                 udelay(100);
 946 #else
 947                 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
 948                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 949                                       VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
 950                 udelay(2);
 951 #endif
 952                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 953                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 954                 udelay(100);
 955         }
 956
 957         pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
 958         if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
 959                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 960                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 961                 udelay(100);
 962         }
 963
 964         /* wait until codec ready */
 965         end_time = jiffies + msecs_to_jiffies(750);
 966         do {
 967                 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 968                 if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
 969                         break;
 970                 set_current_state(TASK_UNINTERRUPTIBLE);
 971                 schedule_timeout(1);
 972         } while (time_before(jiffies, end_time));
 973
 974         if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)
 975                 snd_printk("AC'97 codec is not ready [0x%x]\n", val);
 976
 977         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
 978                                  VIA_REG_AC97_SECONDARY_VALID |
 979                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
 980         end_time = jiffies + msecs_to_jiffies(750);
 981         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
 982                                  VIA_REG_AC97_SECONDARY_VALID |
 983                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
 984         do {
 985                 if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) {
 986                         chip->ac97_secondary = 1;
 987                         goto __ac97_ok2;
 988                 }
 989                 set_current_state(TASK_INTERRUPTIBLE);
 990                 schedule_timeout(1);
 991         } while (time_before(jiffies, end_time));
 992         /* This is ok, the most of motherboards have only one codec */
 993
 994       __ac97_ok2:
 995
 996         /* route FM trap to IRQ, disable FM trap */
 997         // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
 998         /* disable all GPI interrupts */
 999         outl(0, VIAREG(chip, GPI_INTR));
1000
1001         return 0;
1002 }
1003
1004 #ifdef CONFIG_PM
1005 /*
1006  * power management
1007  */
1008 static int snd_via82xx_suspend(snd_card_t *card, pm_message_t state)
1009 {
1010         via82xx_t *chip = card->pm_private_data;
1011         int i;
1012
1013         for (i = 0; i < 2; i++)
1014                 if (chip->pcms[i])
1015                         snd_pcm_suspend_all(chip->pcms[i]);
1016         for (i = 0; i < chip->num_devs; i++)
1017                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1018         synchronize_irq(chip->irq);
1019         snd_ac97_suspend(chip->ac97);
1020         pci_set_power_state(chip->pci, 3);
1021         pci_disable_device(chip->pci);
1022         return 0;
1023 }
1024
1025 static int snd_via82xx_resume(snd_card_t *card)
1026 {
1027         via82xx_t *chip = card->pm_private_data;
1028         int i;
1029
1030         pci_enable_device(chip->pci);
1031         pci_set_power_state(chip->pci, 0);
1032         pci_set_master(chip->pci);
1033
1034         snd_via82xx_chip_init(chip);
1035
1036         snd_ac97_resume(chip->ac97);
1037
1038         for (i = 0; i < chip->num_devs; i++)
1039                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1040
1041         return 0;
1042 }
1043 #endif /* CONFIG_PM */
1044
1045 static int snd_via82xx_free(via82xx_t *chip)
1046 {
1047         unsigned int i;
1048
1049         if (chip->irq < 0)
1050                 goto __end_hw;
1051         /* disable interrupts */
1052         for (i = 0; i < chip->num_devs; i++)
1053                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1054         synchronize_irq(chip->irq);
1055       __end_hw:
1056         if (chip->irq >= 0)
1057                 free_irq(chip->irq, (void *)chip);
1058         pci_release_regions(chip->pci);
1059         pci_disable_device(chip->pci);
1060         kfree(chip);
1061         return 0;
1062 }
1063
1064 static int snd_via82xx_dev_free(snd_device_t *device)
1065 {
1066         via82xx_t *chip = device->device_data;
1067         return snd_via82xx_free(chip);
1068 }
1069
1070 static int __devinit snd_via82xx_create(snd_card_t * card,
1071                                         struct pci_dev *pci,
1072                                         int chip_type,
1073                                         int revision,
1074                                         unsigned int ac97_clock,
1075                                         via82xx_t ** r_via)
1076 {
1077         via82xx_t *chip;
1078         int err;
1079         static snd_device_ops_t ops = {
1080                 .dev_free =     snd_via82xx_dev_free,
1081         };
1082
1083         if ((err = pci_enable_device(pci)) < 0)
1084                 return err;
1085
1086         if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) {
1087                 pci_disable_device(pci);
1088                 return -ENOMEM;
1089         }
1090
1091         spin_lock_init(&chip->reg_lock);
1092         chip->card = card;
1093         chip->pci = pci;
1094         chip->irq = -1;
1095
1096         if ((err = pci_request_regions(pci, card->driver)) < 0) {
1097                 kfree(chip);
1098                 pci_disable_device(pci);
1099                 return err;
1100         }
1101         chip->port = pci_resource_start(pci, 0);
1102         if (request_irq(pci->irq, snd_via82xx_interrupt, SA_INTERRUPT|SA_SHIRQ,
1103                         card->driver, (void *)chip)) {
1104                 snd_printk("unable to grab IRQ %d\n", pci->irq);
1105                 snd_via82xx_free(chip);
1106                 return -EBUSY;
1107         }
1108         chip->irq = pci->irq;
1109         if (ac97_clock >= 8000 && ac97_clock <= 48000)
1110                 chip->ac97_clock = ac97_clock;
1111         synchronize_irq(chip->irq);
1112
1113         if ((err = snd_via82xx_chip_init(chip)) < 0) {
1114                 snd_via82xx_free(chip);
1115                 return err;
1116         }
1117
1118         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1119                 snd_via82xx_free(chip);
1120                 return err;
1121         }
1122
1123         /* The 8233 ac97 controller does not implement the master bit
1124          * in the pci command register. IMHO this is a violation of the PCI spec.
1125          * We call pci_set_master here because it does not hurt. */
1126         pci_set_master(pci);
1127
1128         snd_card_set_dev(card, &pci->dev);
1129
1130         *r_via = chip;
1131         return 0;
1132 }
1133
1134
1135 static int __devinit snd_via82xx_probe(struct pci_dev *pci,
1136                                        const struct pci_device_id *pci_id)
1137 {
1138         static int dev;
1139         snd_card_t *card;
1140         via82xx_t *chip;
1141         unsigned char revision;
1142         int chip_type = 0, card_type;
1143         unsigned int i;
1144         int err;
1145
1146         if (dev >= SNDRV_CARDS)
1147                 return -ENODEV;
1148         if (!enable[dev]) {
1149                 dev++;
1150                 return -ENOENT;
1151         }
1152
1153         card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
1154         if (card == NULL)
1155                 return -ENOMEM;
1156
1157         card_type = pci_id->driver_data;
1158         pci_read_config_byte(pci, PCI_REVISION_ID, &revision);
1159         switch (card_type) {
1160         case TYPE_CARD_VIA82XX_MODEM:
1161                 strcpy(card->driver, "VIA82XX-MODEM");
1162                 sprintf(card->shortname, "VIA 82XX modem");
1163                 break;
1164         default:
1165                 snd_printk(KERN_ERR "invalid card type %d\n", card_type);
1166                 err = -EINVAL;
1167                 goto __error;
1168         }
1169
1170         if ((err = snd_via82xx_create(card, pci, chip_type, revision, ac97_clock[dev], &chip)) < 0)
1171                 goto __error;
1172         if ((err = snd_via82xx_mixer_new(chip)) < 0)
1173                 goto __error;
1174
1175         if ((err = snd_via686_pcm_new(chip)) < 0 )
1176                 goto __error;
1177
1178         snd_card_set_pm_callback(card, snd_via82xx_suspend, snd_via82xx_resume, chip);
1179
1180         /* disable interrupts */
1181         for (i = 0; i < chip->num_devs; i++)
1182                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1183
1184         sprintf(card->longname, "%s at 0x%lx, irq %d",
1185                 card->shortname, chip->port, chip->irq);
1186
1187         snd_via82xx_proc_init(chip);
1188
1189         if ((err = snd_card_register(card)) < 0) {
1190                 snd_card_free(card);
1191                 return err;
1192         }
1193         pci_set_drvdata(pci, card);
1194         dev++;
1195         return 0;
1196
1197  __error:
1198         snd_card_free(card);
1199         return err;
1200 }
1201
1202 static void __devexit snd_via82xx_remove(struct pci_dev *pci)
1203 {
1204         snd_card_free(pci_get_drvdata(pci));
1205         pci_set_drvdata(pci, NULL);
1206 }
1207
1208 static struct pci_driver driver = {
1209         .name = "VIA 82xx Modem",
1210         .owner = THIS_MODULE,
1211         .id_table = snd_via82xx_modem_ids,
1212         .probe = snd_via82xx_probe,
1213         .remove = __devexit_p(snd_via82xx_remove),
1214         SND_PCI_PM_CALLBACKS
1215 };
1216
1217 static int __init alsa_card_via82xx_init(void)
1218 {
1219         return pci_register_driver(&driver);
1220 }
1221
1222 static void __exit alsa_card_via82xx_exit(void)
1223 {
1224         pci_unregister_driver(&driver);
1225 }
1226
1227 module_init(alsa_card_via82xx_init)
1228 module_exit(alsa_card_via82xx_exit)