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                 val |= VIA_REG_CTRL_START;
 525                 viadev->running = 1;
 526                 break;
 527         case SNDRV_PCM_TRIGGER_STOP:
 528                 val = VIA_REG_CTRL_TERMINATE;
 529                 viadev->running = 0;
 530                 break;
 531         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 532                 val |= VIA_REG_CTRL_PAUSE;
 533                 viadev->running = 0;
 534                 break;
 535         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 536                 viadev->running = 1;
 537                 break;
 538         default:
 539                 return -EINVAL;
 540         }
 541         outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
 542         if (cmd == SNDRV_PCM_TRIGGER_STOP)
 543                 snd_via82xx_channel_reset(chip, viadev);
 544         return 0;
 545 }
 546
 547 /*
 548  * pointer callbacks
 549  */
 550
 551 /*
 552  * calculate the linear position at the given sg-buffer index and the rest count
 553  */
 554
 555 #define check_invalid_pos(viadev,pos) \
 556         ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 || viadev->lastpos < viadev->bufsize2))
 557
 558 static inline unsigned int calc_linear_pos(viadev_t *viadev, unsigned int idx, unsigned int count)
 559 {
 560         unsigned int size, res;
 561
 562         size = viadev->idx_table[idx].size;
 563         res = viadev->idx_table[idx].offset + size - count;
 564
 565         /* check the validity of the calculated position */
 566         if (size < count) {
 567                 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (size = %d, count = %d)\n", (int)size, (int)count);
 568                 res = viadev->lastpos;
 569         } else if (check_invalid_pos(viadev, res)) {
 570 #ifdef POINTER_DEBUG
 571                 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);
 572 #endif
 573                 if (count && size < count) {
 574                         snd_printd(KERN_ERR "invalid via82xx_cur_ptr, using last valid pointer\n");
 575                         res = viadev->lastpos;
 576                 } else {
 577                         if (! count)
 578                                 /* bogus count 0 on the DMA boundary? */
 579                                 res = viadev->idx_table[idx].offset;
 580                         else
 581                                 /* count register returns full size when end of buffer is reached */
 582                                 res = viadev->idx_table[idx].offset + size;
 583                         if (check_invalid_pos(viadev, res)) {
 584                                 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (2), using last valid pointer\n");
 585                                 res = viadev->lastpos;
 586                         }
 587                 }
 588         }
 589         viadev->lastpos = res; /* remember the last position */
 590         if (res >= viadev->bufsize)
 591                 res -= viadev->bufsize;
 592         return res;
 593 }
 594
 595 /*
 596  * get the current pointer on via686
 597  */
 598 static snd_pcm_uframes_t snd_via686_pcm_pointer(snd_pcm_substream_t *substream)
 599 {
 600         via82xx_t *chip = snd_pcm_substream_chip(substream);
 601         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 602         unsigned int idx, ptr, count, res;
 603
 604         snd_assert(viadev->tbl_entries, return 0);
 605         if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
 606                 return 0;
 607
 608         spin_lock(&chip->reg_lock);
 609         count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
 610         /* The via686a does not have the current index register,
 611          * so we need to calculate the index from CURR_PTR.
 612          */
 613         ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
 614         if (ptr <= (unsigned int)viadev->table.addr)
 615                 idx = 0;
 616         else /* CURR_PTR holds the address + 8 */
 617                 idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) % viadev->tbl_entries;
 618         res = calc_linear_pos(viadev, idx, count);
 619         spin_unlock(&chip->reg_lock);
 620
 621         return bytes_to_frames(substream->runtime, res);
 622 }
 623
 624 /*
 625  * hw_params callback:
 626  * allocate the buffer and build up the buffer description table
 627  */
 628 static int snd_via82xx_hw_params(snd_pcm_substream_t * substream,
 629                                  snd_pcm_hw_params_t * hw_params)
 630 {
 631         via82xx_t *chip = snd_pcm_substream_chip(substream);
 632         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 633         int err;
 634
 635         err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 636         if (err < 0)
 637                 return err;
 638         err = build_via_table(viadev, substream, chip->pci,
 639                               params_periods(hw_params),
 640                               params_period_bytes(hw_params));
 641         if (err < 0)
 642                 return err;
 643
 644         snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params));
 645         snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0);
 646
 647         return 0;
 648 }
 649
 650 /*
 651  * hw_free callback:
 652  * clean up the buffer description table and release the buffer
 653  */
 654 static int snd_via82xx_hw_free(snd_pcm_substream_t * substream)
 655 {
 656         via82xx_t *chip = snd_pcm_substream_chip(substream);
 657         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 658
 659         clean_via_table(viadev, substream, chip->pci);
 660         snd_pcm_lib_free_pages(substream);
 661         return 0;
 662 }
 663
 664
 665 /*
 666  * set up the table pointer
 667  */
 668 static void snd_via82xx_set_table_ptr(via82xx_t *chip, viadev_t *viadev)
 669 {
 670         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 671         outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
 672         udelay(20);
 673         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 674 }
 675
 676 /*
 677  * prepare callback for playback and capture
 678  */
 679 static int snd_via82xx_pcm_prepare(snd_pcm_substream_t *substream)
 680 {
 681         via82xx_t *chip = snd_pcm_substream_chip(substream);
 682         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 683
 684         snd_via82xx_channel_reset(chip, viadev);
 685         /* this must be set after channel_reset */
 686         snd_via82xx_set_table_ptr(chip, viadev);
 687         outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG,
 688              VIADEV_REG(viadev, OFFSET_TYPE));
 689         return 0;
 690 }
 691
 692 /*
 693  * pcm hardware definition, identical for both playback and capture
 694  */
 695 static snd_pcm_hardware_t snd_via82xx_hw =
 696 {
 697         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 698                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 699                                  SNDRV_PCM_INFO_MMAP_VALID |
 700                                  SNDRV_PCM_INFO_RESUME |
 701                                  SNDRV_PCM_INFO_PAUSE),
 702         .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
 703         .rates =                SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
 704         .rate_min =             8000,
 705         .rate_max =             16000,
 706         .channels_min =         1,
 707         .channels_max =         1,
 708         .buffer_bytes_max =     128 * 1024,
 709         .period_bytes_min =     32,
 710         .period_bytes_max =     128 * 1024,
 711         .periods_min =          2,
 712         .periods_max =          VIA_TABLE_SIZE / 2,
 713         .fifo_size =            0,
 714 };
 715
 716
 717 /*
 718  * open callback skeleton
 719  */
 720 static int snd_via82xx_modem_pcm_open(via82xx_t *chip, viadev_t *viadev, snd_pcm_substream_t * substream)
 721 {
 722         snd_pcm_runtime_t *runtime = substream->runtime;
 723         int err;
 724         static unsigned int rates[] = { 8000,  9600, 12000, 16000 };
 725         static snd_pcm_hw_constraint_list_t hw_constraints_rates = {
 726                 .count = ARRAY_SIZE(rates),
 727                 .list = rates,
 728                 .mask = 0,
 729         };
 730
 731         runtime->hw = snd_via82xx_hw;
 732
 733         if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates)) < 0)
 734                 return err;
 735
 736         /* we may remove following constaint when we modify table entries
 737            in interrupt */
 738         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 739                 return err;
 740
 741         runtime->private_data = viadev;
 742         viadev->substream = substream;
 743
 744         return 0;
 745 }
 746
 747
 748 /*
 749  * open callback for playback
 750  */
 751 static int snd_via82xx_playback_open(snd_pcm_substream_t * substream)
 752 {
 753         via82xx_t *chip = snd_pcm_substream_chip(substream);
 754         viadev_t *viadev = &chip->devs[chip->playback_devno + substream->number];
 755
 756         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 757 }
 758
 759 /*
 760  * open callback for capture
 761  */
 762 static int snd_via82xx_capture_open(snd_pcm_substream_t * substream)
 763 {
 764         via82xx_t *chip = snd_pcm_substream_chip(substream);
 765         viadev_t *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
 766
 767         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 768 }
 769
 770 /*
 771  * close callback
 772  */
 773 static int snd_via82xx_pcm_close(snd_pcm_substream_t * substream)
 774 {
 775         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 776
 777         viadev->substream = NULL;
 778         return 0;
 779 }
 780
 781
 782 /* via686 playback callbacks */
 783 static snd_pcm_ops_t snd_via686_playback_ops = {
 784         .open =         snd_via82xx_playback_open,
 785         .close =        snd_via82xx_pcm_close,
 786         .ioctl =        snd_pcm_lib_ioctl,
 787         .hw_params =    snd_via82xx_hw_params,
 788         .hw_free =      snd_via82xx_hw_free,
 789         .prepare =      snd_via82xx_pcm_prepare,
 790         .trigger =      snd_via82xx_pcm_trigger,
 791         .pointer =      snd_via686_pcm_pointer,
 792         .page =         snd_pcm_sgbuf_ops_page,
 793 };
 794
 795 /* via686 capture callbacks */
 796 static snd_pcm_ops_t snd_via686_capture_ops = {
 797         .open =         snd_via82xx_capture_open,
 798         .close =        snd_via82xx_pcm_close,
 799         .ioctl =        snd_pcm_lib_ioctl,
 800         .hw_params =    snd_via82xx_hw_params,
 801         .hw_free =      snd_via82xx_hw_free,
 802         .prepare =      snd_via82xx_pcm_prepare,
 803         .trigger =      snd_via82xx_pcm_trigger,
 804         .pointer =      snd_via686_pcm_pointer,
 805         .page =         snd_pcm_sgbuf_ops_page,
 806 };
 807
 808
 809 static void init_viadev(via82xx_t *chip, int idx, unsigned int reg_offset, int direction)
 810 {
 811         chip->devs[idx].reg_offset = reg_offset;
 812         chip->devs[idx].direction = direction;
 813         chip->devs[idx].port = chip->port + reg_offset;
 814 }
 815
 816 /*
 817  * create a pcm instance for via686a/b
 818  */
 819 static int __devinit snd_via686_pcm_new(via82xx_t *chip)
 820 {
 821         snd_pcm_t *pcm;
 822         int err;
 823
 824         chip->playback_devno = 0;
 825         chip->capture_devno = 1;
 826         chip->num_devs = 2;
 827         chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */
 828
 829         err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
 830         if (err < 0)
 831                 return err;
 832         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
 833         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
 834         pcm->private_data = chip;
 835         strcpy(pcm->name, chip->card->shortname);
 836         chip->pcms[0] = pcm;
 837         init_viadev(chip, 0, VIA_REG_MO_STATUS, 0);
 838         init_viadev(chip, 1, VIA_REG_MI_STATUS, 1);
 839
 840         if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
 841                                                          snd_dma_pci_data(chip->pci), 64*1024, 128*1024)) < 0)
 842                 return err;
 843
 844         return 0;
 845 }
 846
 847
 848 /*
 849  *  Mixer part
 850  */
 851
 852
 853 static void snd_via82xx_mixer_free_ac97_bus(ac97_bus_t *bus)
 854 {
 855         via82xx_t *chip = bus->private_data;
 856         chip->ac97_bus = NULL;
 857 }
 858
 859 static void snd_via82xx_mixer_free_ac97(ac97_t *ac97)
 860 {
 861         via82xx_t *chip = ac97->private_data;
 862         chip->ac97 = NULL;
 863 }
 864
 865
 866 static int __devinit snd_via82xx_mixer_new(via82xx_t *chip)
 867 {
 868         ac97_template_t ac97;
 869         int err;
 870         static ac97_bus_ops_t ops = {
 871                 .write = snd_via82xx_codec_write,
 872                 .read = snd_via82xx_codec_read,
 873                 .wait = snd_via82xx_codec_wait,
 874         };
 875
 876         if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
 877                 return err;
 878         chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
 879         chip->ac97_bus->clock = chip->ac97_clock;
 880         chip->ac97_bus->shared_type = AC97_SHARED_TYPE_VIA;
 881
 882         memset(&ac97, 0, sizeof(ac97));
 883         ac97.private_data = chip;
 884         ac97.private_free = snd_via82xx_mixer_free_ac97;
 885         ac97.pci = chip->pci;
 886         ac97.scaps = AC97_SCAP_SKIP_AUDIO;
 887         ac97.num = chip->ac97_secondary;
 888
 889         if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
 890                 return err;
 891
 892         return 0;
 893 }
 894
 895
 896 /*
 897  * proc interface
 898  */
 899 static void snd_via82xx_proc_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
 900 {
 901         via82xx_t *chip = entry->private_data;
 902         int i;
 903
 904         snd_iprintf(buffer, "%s\n\n", chip->card->longname);
 905         for (i = 0; i < 0xa0; i += 4) {
 906                 snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
 907         }
 908 }
 909
 910 static void __devinit snd_via82xx_proc_init(via82xx_t *chip)
 911 {
 912         snd_info_entry_t *entry;
 913
 914         if (! snd_card_proc_new(chip->card, "via82xx", &entry))
 915                 snd_info_set_text_ops(entry, chip, 1024, snd_via82xx_proc_read);
 916 }
 917
 918 /*
 919  *
 920  */
 921
 922 static int snd_via82xx_chip_init(via82xx_t *chip)
 923 {
 924         unsigned int val;
 925         unsigned long end_time;
 926         unsigned char pval;
 927
 928         pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval);
 929         if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) {
 930                 pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT);
 931                 udelay(100);
 932         }
 933
 934         pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 935         if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
 936                 /* deassert ACLink reset, force SYNC */
 937                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 938                                       VIA_ACLINK_CTRL_ENABLE |
 939                                       VIA_ACLINK_CTRL_RESET |
 940                                       VIA_ACLINK_CTRL_SYNC);
 941                 udelay(100);
 942 #if 1 /* FIXME: should we do full reset here for all chip models? */
 943                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
 944                 udelay(100);
 945 #else
 946                 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
 947                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 948                                       VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
 949                 udelay(2);
 950 #endif
 951                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 952                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 953                 udelay(100);
 954         }
 955
 956         pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
 957         if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
 958                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 959                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 960                 udelay(100);
 961         }
 962
 963         /* wait until codec ready */
 964         end_time = jiffies + msecs_to_jiffies(750);
 965         do {
 966                 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 967                 if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
 968                         break;
 969                 set_current_state(TASK_UNINTERRUPTIBLE);
 970                 schedule_timeout(1);
 971         } while (time_before(jiffies, end_time));
 972
 973         if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)
 974                 snd_printk("AC'97 codec is not ready [0x%x]\n", val);
 975
 976         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
 977                                  VIA_REG_AC97_SECONDARY_VALID |
 978                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
 979         end_time = jiffies + msecs_to_jiffies(750);
 980         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
 981                                  VIA_REG_AC97_SECONDARY_VALID |
 982                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
 983         do {
 984                 if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) {
 985                         chip->ac97_secondary = 1;
 986                         goto __ac97_ok2;
 987                 }
 988                 set_current_state(TASK_INTERRUPTIBLE);
 989                 schedule_timeout(1);
 990         } while (time_before(jiffies, end_time));
 991         /* This is ok, the most of motherboards have only one codec */
 992
 993       __ac97_ok2:
 994
 995         /* route FM trap to IRQ, disable FM trap */
 996         // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
 997         /* disable all GPI interrupts */
 998         outl(0, VIAREG(chip, GPI_INTR));
 999
1000         return 0;
1001 }
1002
1003 #ifdef CONFIG_PM
1004 /*
1005  * power management
1006  */
1007 static int snd_via82xx_suspend(snd_card_t *card, pm_message_t state)
1008 {
1009         via82xx_t *chip = card->pm_private_data;
1010         int i;
1011
1012         for (i = 0; i < 2; i++)
1013                 if (chip->pcms[i])
1014                         snd_pcm_suspend_all(chip->pcms[i]);
1015         for (i = 0; i < chip->num_devs; i++)
1016                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1017         synchronize_irq(chip->irq);
1018         snd_ac97_suspend(chip->ac97);
1019         pci_set_power_state(chip->pci, 3);
1020         pci_disable_device(chip->pci);
1021         return 0;
1022 }
1023
1024 static int snd_via82xx_resume(snd_card_t *card)
1025 {
1026         via82xx_t *chip = card->pm_private_data;
1027         int i;
1028
1029         pci_enable_device(chip->pci);
1030         pci_set_power_state(chip->pci, 0);
1031         pci_set_master(chip->pci);
1032
1033         snd_via82xx_chip_init(chip);
1034
1035         snd_ac97_resume(chip->ac97);
1036
1037         for (i = 0; i < chip->num_devs; i++)
1038                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1039
1040         return 0;
1041 }
1042 #endif /* CONFIG_PM */
1043
1044 static int snd_via82xx_free(via82xx_t *chip)
1045 {
1046         unsigned int i;
1047
1048         if (chip->irq < 0)
1049                 goto __end_hw;
1050         /* disable interrupts */
1051         for (i = 0; i < chip->num_devs; i++)
1052                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1053         synchronize_irq(chip->irq);
1054       __end_hw:
1055         if (chip->irq >= 0)
1056                 free_irq(chip->irq, (void *)chip);
1057         pci_release_regions(chip->pci);
1058         pci_disable_device(chip->pci);
1059         kfree(chip);
1060         return 0;
1061 }
1062
1063 static int snd_via82xx_dev_free(snd_device_t *device)
1064 {
1065         via82xx_t *chip = device->device_data;
1066         return snd_via82xx_free(chip);
1067 }
1068
1069 static int __devinit snd_via82xx_create(snd_card_t * card,
1070                                         struct pci_dev *pci,
1071                                         int chip_type,
1072                                         int revision,
1073                                         unsigned int ac97_clock,
1074                                         via82xx_t ** r_via)
1075 {
1076         via82xx_t *chip;
1077         int err;
1078         static snd_device_ops_t ops = {
1079                 .dev_free =     snd_via82xx_dev_free,
1080         };
1081
1082         if ((err = pci_enable_device(pci)) < 0)
1083                 return err;
1084
1085         if ((chip = kcalloc(1, sizeof(*chip), GFP_KERNEL)) == NULL) {
1086                 pci_disable_device(pci);
1087                 return -ENOMEM;
1088         }
1089
1090         spin_lock_init(&chip->reg_lock);
1091         chip->card = card;
1092         chip->pci = pci;
1093         chip->irq = -1;
1094
1095         if ((err = pci_request_regions(pci, card->driver)) < 0) {
1096                 kfree(chip);
1097                 pci_disable_device(pci);
1098                 return err;
1099         }
1100         chip->port = pci_resource_start(pci, 0);
1101         if (request_irq(pci->irq, snd_via82xx_interrupt, SA_INTERRUPT|SA_SHIRQ,
1102                         card->driver, (void *)chip)) {
1103                 snd_printk("unable to grab IRQ %d\n", pci->irq);
1104                 snd_via82xx_free(chip);
1105                 return -EBUSY;
1106         }
1107         chip->irq = pci->irq;
1108         if (ac97_clock >= 8000 && ac97_clock <= 48000)
1109                 chip->ac97_clock = ac97_clock;
1110         synchronize_irq(chip->irq);
1111
1112         if ((err = snd_via82xx_chip_init(chip)) < 0) {
1113                 snd_via82xx_free(chip);
1114                 return err;
1115         }
1116
1117         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1118                 snd_via82xx_free(chip);
1119                 return err;
1120         }
1121
1122         /* The 8233 ac97 controller does not implement the master bit
1123          * in the pci command register. IMHO this is a violation of the PCI spec.
1124          * We call pci_set_master here because it does not hurt. */
1125         pci_set_master(pci);
1126
1127         snd_card_set_dev(card, &pci->dev);
1128
1129         *r_via = chip;
1130         return 0;
1131 }
1132
1133
1134 static int __devinit snd_via82xx_probe(struct pci_dev *pci,
1135                                        const struct pci_device_id *pci_id)
1136 {
1137         static int dev;
1138         snd_card_t *card;
1139         via82xx_t *chip;
1140         unsigned char revision;
1141         int chip_type = 0, card_type;
1142         unsigned int i;
1143         int err;
1144
1145         if (dev >= SNDRV_CARDS)
1146                 return -ENODEV;
1147         if (!enable[dev]) {
1148                 dev++;
1149                 return -ENOENT;
1150         }
1151
1152         card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
1153         if (card == NULL)
1154                 return -ENOMEM;
1155
1156         card_type = pci_id->driver_data;
1157         pci_read_config_byte(pci, PCI_REVISION_ID, &revision);
1158         switch (card_type) {
1159         case TYPE_CARD_VIA82XX_MODEM:
1160                 strcpy(card->driver, "VIA82XX-MODEM");
1161                 sprintf(card->shortname, "VIA 82XX modem");
1162                 break;
1163         default:
1164                 snd_printk(KERN_ERR "invalid card type %d\n", card_type);
1165                 err = -EINVAL;
1166                 goto __error;
1167         }
1168
1169         if ((err = snd_via82xx_create(card, pci, chip_type, revision, ac97_clock[dev], &chip)) < 0)
1170                 goto __error;
1171         if ((err = snd_via82xx_mixer_new(chip)) < 0)
1172                 goto __error;
1173
1174         if ((err = snd_via686_pcm_new(chip)) < 0 )
1175                 goto __error;
1176
1177         snd_card_set_pm_callback(card, snd_via82xx_suspend, snd_via82xx_resume, chip);
1178
1179         /* disable interrupts */
1180         for (i = 0; i < chip->num_devs; i++)
1181                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1182
1183         sprintf(card->longname, "%s at 0x%lx, irq %d",
1184                 card->shortname, chip->port, chip->irq);
1185
1186         snd_via82xx_proc_init(chip);
1187
1188         if ((err = snd_card_register(card)) < 0) {
1189                 snd_card_free(card);
1190                 return err;
1191         }
1192         pci_set_drvdata(pci, card);
1193         dev++;
1194         return 0;
1195
1196  __error:
1197         snd_card_free(card);
1198         return err;
1199 }
1200
1201 static void __devexit snd_via82xx_remove(struct pci_dev *pci)
1202 {
1203         snd_card_free(pci_get_drvdata(pci));
1204         pci_set_drvdata(pci, NULL);
1205 }
1206
1207 static struct pci_driver driver = {
1208         .name = "VIA 82xx Modem",
1209         .id_table = snd_via82xx_modem_ids,
1210         .probe = snd_via82xx_probe,
1211         .remove = __devexit_p(snd_via82xx_remove),
1212         SND_PCI_PM_CALLBACKS
1213 };
1214
1215 static int __init alsa_card_via82xx_init(void)
1216 {
1217         return pci_register_driver(&driver);
1218 }
1219
1220 static void __exit alsa_card_via82xx_exit(void)
1221 {
1222         pci_unregister_driver(&driver);
1223 }
1224
1225 module_init(alsa_card_via82xx_init)
1226 module_exit(alsa_card_via82xx_exit)