sound/pci/via82xx_modem.c

   1 /*
   2  *   ALSA modem driver for VIA VT82xx (South Bridge)
   3  *
   4  *   VT82C686A/B/C, VT8233A/C, VT8235
   5  *
   6  *      Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz>
   7  *                         Tjeerd.Mulder <Tjeerd.Mulder@fujitsu-siemens.com>
   8  *                    2002 Takashi Iwai <tiwai@suse.de>
   9  *
  10  *   This program is free software; you can redistribute it and/or modify
  11  *   it under the terms of the GNU General Public License as published by
  12  *   the Free Software Foundation; either version 2 of the License, or
  13  *   (at your option) any later version.
  14  *
  15  *   This program is distributed in the hope that it will be useful,
  16  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *   GNU General Public License for more details.
  19  *
  20  *   You should have received a copy of the GNU General Public License
  21  *   along with this program; if not, write to the Free Software
  22  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  23  *
  24  */
  25
  26 /*
  27  * Changes:
  28  *
  29  * Sep. 2,  2004  Sasha Khapyorsky <sashak@alsa-project.org>
  30  *      Modified from original audio driver 'via82xx.c' to support AC97
  31  *      modems.
  32  */
  33
  34 #include <linux/io.h>
  35 #include <linux/delay.h>
  36 #include <linux/interrupt.h>
  37 #include <linux/init.h>
  38 #include <linux/pci.h>
  39 #include <linux/slab.h>
  40 #include <linux/module.h>
  41 #include <sound/core.h>
  42 #include <sound/pcm.h>
  43 #include <sound/pcm_params.h>
  44 #include <sound/info.h>
  45 #include <sound/ac97_codec.h>
  46 #include <sound/initval.h>
  47
  48 #if 0
  49 #define POINTER_DEBUG
  50 #endif
  51
  52 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  53 MODULE_DESCRIPTION("VIA VT82xx modem");
  54 MODULE_LICENSE("GPL");
  55 MODULE_SUPPORTED_DEVICE("{{VIA,VT82C686A/B/C modem,pci}}");
  56
  57 static int index = -2; /* Exclude the first card */
  58 static char *id = SNDRV_DEFAULT_STR1;   /* ID for this card */
  59 static int ac97_clock = 48000;
  60
  61 module_param(index, int, 0444);
  62 MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge.");
  63 module_param(id, charp, 0444);
  64 MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge.");
  65 module_param(ac97_clock, int, 0444);
  66 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
  67
  68 /* just for backward compatibility */
  69 static bool enable;
  70 module_param(enable, bool, 0444);
  71
  72
  73 /*
  74  *  Direct registers
  75  */
  76
  77 #define VIAREG(via, x) ((via)->port + VIA_REG_##x)
  78 #define VIADEV_REG(viadev, x) ((viadev)->port + VIA_REG_##x)
  79
  80 /* common offsets */
  81 #define VIA_REG_OFFSET_STATUS           0x00    /* byte - channel status */
  82 #define   VIA_REG_STAT_ACTIVE           0x80    /* RO */
  83 #define   VIA_REG_STAT_PAUSED           0x40    /* RO */
  84 #define   VIA_REG_STAT_TRIGGER_QUEUED   0x08    /* RO */
  85 #define   VIA_REG_STAT_STOPPED          0x04    /* RWC */
  86 #define   VIA_REG_STAT_EOL              0x02    /* RWC */
  87 #define   VIA_REG_STAT_FLAG             0x01    /* RWC */
  88 #define VIA_REG_OFFSET_CONTROL          0x01    /* byte - channel control */
  89 #define   VIA_REG_CTRL_START            0x80    /* WO */
  90 #define   VIA_REG_CTRL_TERMINATE        0x40    /* WO */
  91 #define   VIA_REG_CTRL_AUTOSTART        0x20
  92 #define   VIA_REG_CTRL_PAUSE            0x08    /* RW */
  93 #define   VIA_REG_CTRL_INT_STOP         0x04
  94 #define   VIA_REG_CTRL_INT_EOL          0x02
  95 #define   VIA_REG_CTRL_INT_FLAG         0x01
  96 #define   VIA_REG_CTRL_RESET            0x01    /* RW - probably reset? undocumented */
  97 #define   VIA_REG_CTRL_INT (VIA_REG_CTRL_INT_FLAG | VIA_REG_CTRL_INT_EOL | VIA_REG_CTRL_AUTOSTART)
  98 #define VIA_REG_OFFSET_TYPE             0x02    /* byte - channel type (686 only) */
  99 #define   VIA_REG_TYPE_AUTOSTART        0x80    /* RW - autostart at EOL */
 100 #define   VIA_REG_TYPE_16BIT            0x20    /* RW */
 101 #define   VIA_REG_TYPE_STEREO           0x10    /* RW */
 102 #define   VIA_REG_TYPE_INT_LLINE        0x00
 103 #define   VIA_REG_TYPE_INT_LSAMPLE      0x04
 104 #define   VIA_REG_TYPE_INT_LESSONE      0x08
 105 #define   VIA_REG_TYPE_INT_MASK         0x0c
 106 #define   VIA_REG_TYPE_INT_EOL          0x02
 107 #define   VIA_REG_TYPE_INT_FLAG         0x01
 108 #define VIA_REG_OFFSET_TABLE_PTR        0x04    /* dword - channel table pointer */
 109 #define VIA_REG_OFFSET_CURR_PTR         0x04    /* dword - channel current pointer */
 110 #define VIA_REG_OFFSET_STOP_IDX         0x08    /* dword - stop index, channel type, sample rate */
 111 #define VIA_REG_OFFSET_CURR_COUNT       0x0c    /* dword - channel current count (24 bit) */
 112 #define VIA_REG_OFFSET_CURR_INDEX       0x0f    /* byte - channel current index (for via8233 only) */
 113
 114 #define DEFINE_VIA_REGSET(name,val) \
 115 enum {\
 116         VIA_REG_##name##_STATUS         = (val),\
 117         VIA_REG_##name##_CONTROL        = (val) + 0x01,\
 118         VIA_REG_##name##_TYPE           = (val) + 0x02,\
 119         VIA_REG_##name##_TABLE_PTR      = (val) + 0x04,\
 120         VIA_REG_##name##_CURR_PTR       = (val) + 0x04,\
 121         VIA_REG_##name##_STOP_IDX       = (val) + 0x08,\
 122         VIA_REG_##name##_CURR_COUNT     = (val) + 0x0c,\
 123 }
 124
 125 /* modem block */
 126 DEFINE_VIA_REGSET(MO, 0x40);
 127 DEFINE_VIA_REGSET(MI, 0x50);
 128
 129 /* AC'97 */
 130 #define VIA_REG_AC97                    0x80    /* dword */
 131 #define   VIA_REG_AC97_CODEC_ID_MASK    (3<<30)
 132 #define   VIA_REG_AC97_CODEC_ID_SHIFT   30
 133 #define   VIA_REG_AC97_CODEC_ID_PRIMARY 0x00
 134 #define   VIA_REG_AC97_CODEC_ID_SECONDARY 0x01
 135 #define   VIA_REG_AC97_SECONDARY_VALID  (1<<27)
 136 #define   VIA_REG_AC97_PRIMARY_VALID    (1<<25)
 137 #define   VIA_REG_AC97_BUSY             (1<<24)
 138 #define   VIA_REG_AC97_READ             (1<<23)
 139 #define   VIA_REG_AC97_CMD_SHIFT        16
 140 #define   VIA_REG_AC97_CMD_MASK         0x7e
 141 #define   VIA_REG_AC97_DATA_SHIFT       0
 142 #define   VIA_REG_AC97_DATA_MASK        0xffff
 143
 144 #define VIA_REG_SGD_SHADOW              0x84    /* dword */
 145 #define   VIA_REG_SGD_STAT_PB_FLAG      (1<<0)
 146 #define   VIA_REG_SGD_STAT_CP_FLAG      (1<<1)
 147 #define   VIA_REG_SGD_STAT_FM_FLAG      (1<<2)
 148 #define   VIA_REG_SGD_STAT_PB_EOL       (1<<4)
 149 #define   VIA_REG_SGD_STAT_CP_EOL       (1<<5)
 150 #define   VIA_REG_SGD_STAT_FM_EOL       (1<<6)
 151 #define   VIA_REG_SGD_STAT_PB_STOP      (1<<8)
 152 #define   VIA_REG_SGD_STAT_CP_STOP      (1<<9)
 153 #define   VIA_REG_SGD_STAT_FM_STOP      (1<<10)
 154 #define   VIA_REG_SGD_STAT_PB_ACTIVE    (1<<12)
 155 #define   VIA_REG_SGD_STAT_CP_ACTIVE    (1<<13)
 156 #define   VIA_REG_SGD_STAT_FM_ACTIVE    (1<<14)
 157 #define   VIA_REG_SGD_STAT_MR_FLAG      (1<<16)
 158 #define   VIA_REG_SGD_STAT_MW_FLAG      (1<<17)
 159 #define   VIA_REG_SGD_STAT_MR_EOL       (1<<20)
 160 #define   VIA_REG_SGD_STAT_MW_EOL       (1<<21)
 161 #define   VIA_REG_SGD_STAT_MR_STOP      (1<<24)
 162 #define   VIA_REG_SGD_STAT_MW_STOP      (1<<25)
 163 #define   VIA_REG_SGD_STAT_MR_ACTIVE    (1<<28)
 164 #define   VIA_REG_SGD_STAT_MW_ACTIVE    (1<<29)
 165
 166 #define VIA_REG_GPI_STATUS              0x88
 167 #define VIA_REG_GPI_INTR                0x8c
 168
 169 #define VIA_TBL_BIT_FLAG        0x40000000
 170 #define VIA_TBL_BIT_EOL         0x80000000
 171
 172 /* pci space */
 173 #define VIA_ACLINK_STAT         0x40
 174 #define  VIA_ACLINK_C11_READY   0x20
 175 #define  VIA_ACLINK_C10_READY   0x10
 176 #define  VIA_ACLINK_C01_READY   0x04 /* secondary codec ready */
 177 #define  VIA_ACLINK_LOWPOWER    0x02 /* low-power state */
 178 #define  VIA_ACLINK_C00_READY   0x01 /* primary codec ready */
 179 #define VIA_ACLINK_CTRL         0x41
 180 #define  VIA_ACLINK_CTRL_ENABLE 0x80 /* 0: disable, 1: enable */
 181 #define  VIA_ACLINK_CTRL_RESET  0x40 /* 0: assert, 1: de-assert */
 182 #define  VIA_ACLINK_CTRL_SYNC   0x20 /* 0: release SYNC, 1: force SYNC hi */
 183 #define  VIA_ACLINK_CTRL_SDO    0x10 /* 0: release SDO, 1: force SDO hi */
 184 #define  VIA_ACLINK_CTRL_VRA    0x08 /* 0: disable VRA, 1: enable VRA */
 185 #define  VIA_ACLINK_CTRL_PCM    0x04 /* 0: disable PCM, 1: enable PCM */
 186 #define  VIA_ACLINK_CTRL_FM     0x02 /* via686 only */
 187 #define  VIA_ACLINK_CTRL_SB     0x01 /* via686 only */
 188 #define  VIA_ACLINK_CTRL_INIT   (VIA_ACLINK_CTRL_ENABLE|\
 189                                  VIA_ACLINK_CTRL_RESET|\
 190                                  VIA_ACLINK_CTRL_PCM)
 191 #define VIA_FUNC_ENABLE         0x42
 192 #define  VIA_FUNC_MIDI_PNP      0x80 /* FIXME: it's 0x40 in the datasheet! */
 193 #define  VIA_FUNC_MIDI_IRQMASK  0x40 /* FIXME: not documented! */
 194 #define  VIA_FUNC_RX2C_WRITE    0x20
 195 #define  VIA_FUNC_SB_FIFO_EMPTY 0x10
 196 #define  VIA_FUNC_ENABLE_GAME   0x08
 197 #define  VIA_FUNC_ENABLE_FM     0x04
 198 #define  VIA_FUNC_ENABLE_MIDI   0x02
 199 #define  VIA_FUNC_ENABLE_SB     0x01
 200 #define VIA_PNP_CONTROL         0x43
 201 #define VIA_MC97_CTRL           0x44
 202 #define  VIA_MC97_CTRL_ENABLE   0x80
 203 #define  VIA_MC97_CTRL_SECONDARY 0x40
 204 #define  VIA_MC97_CTRL_INIT     (VIA_MC97_CTRL_ENABLE|\
 205                                  VIA_MC97_CTRL_SECONDARY)
 206
 207
 208 /*
 209  * pcm stream
 210  */
 211
 212 struct snd_via_sg_table {
 213         unsigned int offset;
 214         unsigned int size;
 215 } ;
 216
 217 #define VIA_TABLE_SIZE  255
 218
 219 struct viadev {
 220         unsigned int reg_offset;
 221         unsigned long port;
 222         int direction;  /* playback = 0, capture = 1 */
 223         struct snd_pcm_substream *substream;
 224         int running;
 225         unsigned int tbl_entries; /* # descriptors */
 226         struct snd_dma_buffer table;
 227         struct snd_via_sg_table *idx_table;
 228         /* for recovery from the unexpected pointer */
 229         unsigned int lastpos;
 230         unsigned int bufsize;
 231         unsigned int bufsize2;
 232 };
 233
 234 enum { TYPE_CARD_VIA82XX_MODEM = 1 };
 235
 236 #define VIA_MAX_MODEM_DEVS      2
 237
 238 struct via82xx_modem {
 239         int irq;
 240
 241         unsigned long port;
 242
 243         unsigned int intr_mask; /* SGD_SHADOW mask to check interrupts */
 244
 245         struct pci_dev *pci;
 246         struct snd_card *card;
 247
 248         unsigned int num_devs;
 249         unsigned int playback_devno, capture_devno;
 250         struct viadev devs[VIA_MAX_MODEM_DEVS];
 251
 252         struct snd_pcm *pcms[2];
 253
 254         struct snd_ac97_bus *ac97_bus;
 255         struct snd_ac97 *ac97;
 256         unsigned int ac97_clock;
 257         unsigned int ac97_secondary;    /* secondary AC'97 codec is present */
 258
 259         spinlock_t reg_lock;
 260         struct snd_info_entry *proc_entry;
 261 };
 262
 263 static const struct pci_device_id snd_via82xx_modem_ids[] = {
 264         { PCI_VDEVICE(VIA, 0x3068), TYPE_CARD_VIA82XX_MODEM, },
 265         { 0, }
 266 };
 267
 268 MODULE_DEVICE_TABLE(pci, snd_via82xx_modem_ids);
 269
 270 /*
 271  */
 272
 273 /*
 274  * allocate and initialize the descriptor buffers
 275  * periods = number of periods
 276  * fragsize = period size in bytes
 277  */
 278 static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
 279                            struct pci_dev *pci,
 280                            unsigned int periods, unsigned int fragsize)
 281 {
 282         unsigned int i, idx, ofs, rest;
 283         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 284
 285         if (dev->table.area == NULL) {
 286                 /* the start of each lists must be aligned to 8 bytes,
 287                  * but the kernel pages are much bigger, so we don't care
 288                  */
 289                 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
 290                                         PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8),
 291                                         &dev->table) < 0)
 292                         return -ENOMEM;
 293         }
 294         if (! dev->idx_table) {
 295                 dev->idx_table = kmalloc(sizeof(*dev->idx_table) * VIA_TABLE_SIZE, GFP_KERNEL);
 296                 if (! dev->idx_table)
 297                         return -ENOMEM;
 298         }
 299
 300         /* fill the entries */
 301         idx = 0;
 302         ofs = 0;
 303         for (i = 0; i < periods; i++) {
 304                 rest = fragsize;
 305                 /* fill descriptors for a period.
 306                  * a period can be split to several descriptors if it's
 307                  * over page boundary.
 308                  */
 309                 do {
 310                         unsigned int r;
 311                         unsigned int flag;
 312                         unsigned int addr;
 313
 314                         if (idx >= VIA_TABLE_SIZE) {
 315                                 dev_err(&pci->dev, "too much table size!\n");
 316                                 return -EINVAL;
 317                         }
 318                         addr = snd_pcm_sgbuf_get_addr(substream, ofs);
 319                         ((u32 *)dev->table.area)[idx << 1] = cpu_to_le32(addr);
 320                         r = PAGE_SIZE - (ofs % PAGE_SIZE);
 321                         if (rest < r)
 322                                 r = rest;
 323                         rest -= r;
 324                         if (! rest) {
 325                                 if (i == periods - 1)
 326                                         flag = VIA_TBL_BIT_EOL; /* buffer boundary */
 327                                 else
 328                                         flag = VIA_TBL_BIT_FLAG; /* period boundary */
 329                         } else
 330                                 flag = 0; /* period continues to the next */
 331                         /*
 332                         dev_dbg(&pci->dev,
 333                                 "tbl %d: at %d  size %d (rest %d)\n",
 334                                 idx, ofs, r, rest);
 335                         */
 336                         ((u32 *)dev->table.area)[(idx<<1) + 1] = cpu_to_le32(r | flag);
 337                         dev->idx_table[idx].offset = ofs;
 338                         dev->idx_table[idx].size = r;
 339                         ofs += r;
 340                         idx++;
 341                 } while (rest > 0);
 342         }
 343         dev->tbl_entries = idx;
 344         dev->bufsize = periods * fragsize;
 345         dev->bufsize2 = dev->bufsize / 2;
 346         return 0;
 347 }
 348
 349
 350 static int clean_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
 351                            struct pci_dev *pci)
 352 {
 353         if (dev->table.area) {
 354                 snd_dma_free_pages(&dev->table);
 355                 dev->table.area = NULL;
 356         }
 357         kfree(dev->idx_table);
 358         dev->idx_table = NULL;
 359         return 0;
 360 }
 361
 362 /*
 363  *  Basic I/O
 364  */
 365
 366 static inline unsigned int snd_via82xx_codec_xread(struct via82xx_modem *chip)
 367 {
 368         return inl(VIAREG(chip, AC97));
 369 }
 370
 371 static inline void snd_via82xx_codec_xwrite(struct via82xx_modem *chip, unsigned int val)
 372 {
 373         outl(val, VIAREG(chip, AC97));
 374 }
 375
 376 static int snd_via82xx_codec_ready(struct via82xx_modem *chip, int secondary)
 377 {
 378         unsigned int timeout = 1000;    /* 1ms */
 379         unsigned int val;
 380
 381         while (timeout-- > 0) {
 382                 udelay(1);
 383                 if (!((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY))
 384                         return val & 0xffff;
 385         }
 386         dev_err(chip->card->dev, "codec_ready: codec %i is not ready [0x%x]\n",
 387                    secondary, snd_via82xx_codec_xread(chip));
 388         return -EIO;
 389 }
 390
 391 static int snd_via82xx_codec_valid(struct via82xx_modem *chip, int secondary)
 392 {
 393         unsigned int timeout = 1000;    /* 1ms */
 394         unsigned int val, val1;
 395         unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
 396                                          VIA_REG_AC97_SECONDARY_VALID;
 397
 398         while (timeout-- > 0) {
 399                 val = snd_via82xx_codec_xread(chip);
 400                 val1 = val & (VIA_REG_AC97_BUSY | stat);
 401                 if (val1 == stat)
 402                         return val & 0xffff;
 403                 udelay(1);
 404         }
 405         return -EIO;
 406 }
 407
 408 static void snd_via82xx_codec_wait(struct snd_ac97 *ac97)
 409 {
 410         struct via82xx_modem *chip = ac97->private_data;
 411         int err;
 412         err = snd_via82xx_codec_ready(chip, ac97->num);
 413         /* here we need to wait fairly for long time.. */
 414         msleep(500);
 415 }
 416
 417 static void snd_via82xx_codec_write(struct snd_ac97 *ac97,
 418                                     unsigned short reg,
 419                                     unsigned short val)
 420 {
 421         struct via82xx_modem *chip = ac97->private_data;
 422         unsigned int xval;
 423         if(reg == AC97_GPIO_STATUS) {
 424                 outl(val, VIAREG(chip, GPI_STATUS));
 425                 return;
 426         }
 427         xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
 428         xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
 429         xval |= reg << VIA_REG_AC97_CMD_SHIFT;
 430         xval |= val << VIA_REG_AC97_DATA_SHIFT;
 431         snd_via82xx_codec_xwrite(chip, xval);
 432         snd_via82xx_codec_ready(chip, ac97->num);
 433 }
 434
 435 static unsigned short snd_via82xx_codec_read(struct snd_ac97 *ac97, unsigned short reg)
 436 {
 437         struct via82xx_modem *chip = ac97->private_data;
 438         unsigned int xval, val = 0xffff;
 439         int again = 0;
 440
 441         xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
 442         xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
 443         xval |= VIA_REG_AC97_READ;
 444         xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
 445         while (1) {
 446                 if (again++ > 3) {
 447                         dev_err(chip->card->dev,
 448                                 "codec_read: codec %i is not valid [0x%x]\n",
 449                                    ac97->num, snd_via82xx_codec_xread(chip));
 450                         return 0xffff;
 451                 }
 452                 snd_via82xx_codec_xwrite(chip, xval);
 453                 udelay (20);
 454                 if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) {
 455                         udelay(25);
 456                         val = snd_via82xx_codec_xread(chip);
 457                         break;
 458                 }
 459         }
 460         return val & 0xffff;
 461 }
 462
 463 static void snd_via82xx_channel_reset(struct via82xx_modem *chip, struct viadev *viadev)
 464 {
 465         outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET,
 466              VIADEV_REG(viadev, OFFSET_CONTROL));
 467         inb(VIADEV_REG(viadev, OFFSET_CONTROL));
 468         udelay(50);
 469         /* disable interrupts */
 470         outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL));
 471         /* clear interrupts */
 472         outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS));
 473         outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */
 474         // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
 475         viadev->lastpos = 0;
 476 }
 477
 478
 479 /*
 480  *  Interrupt handler
 481  */
 482
 483 static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id)
 484 {
 485         struct via82xx_modem *chip = dev_id;
 486         unsigned int status;
 487         unsigned int i;
 488
 489         status = inl(VIAREG(chip, SGD_SHADOW));
 490         if (! (status & chip->intr_mask)) {
 491                 return IRQ_NONE;
 492         }
 493 // _skip_sgd:
 494
 495         /* check status for each stream */
 496         spin_lock(&chip->reg_lock);
 497         for (i = 0; i < chip->num_devs; i++) {
 498                 struct viadev *viadev = &chip->devs[i];
 499                 unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
 500                 c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED);
 501                 if (! c_status)
 502                         continue;
 503                 if (viadev->substream && viadev->running) {
 504                         spin_unlock(&chip->reg_lock);
 505                         snd_pcm_period_elapsed(viadev->substream);
 506                         spin_lock(&chip->reg_lock);
 507                 }
 508                 outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
 509         }
 510         spin_unlock(&chip->reg_lock);
 511         return IRQ_HANDLED;
 512 }
 513
 514 /*
 515  *  PCM callbacks
 516  */
 517
 518 /*
 519  * trigger callback
 520  */
 521 static int snd_via82xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 522 {
 523         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 524         struct viadev *viadev = substream->runtime->private_data;
 525         unsigned char val = 0;
 526
 527         switch (cmd) {
 528         case SNDRV_PCM_TRIGGER_START:
 529         case SNDRV_PCM_TRIGGER_SUSPEND:
 530                 val |= VIA_REG_CTRL_START;
 531                 viadev->running = 1;
 532                 break;
 533         case SNDRV_PCM_TRIGGER_STOP:
 534                 val = VIA_REG_CTRL_TERMINATE;
 535                 viadev->running = 0;
 536                 break;
 537         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 538                 val |= VIA_REG_CTRL_PAUSE;
 539                 viadev->running = 0;
 540                 break;
 541         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 542                 viadev->running = 1;
 543                 break;
 544         default:
 545                 return -EINVAL;
 546         }
 547         outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
 548         if (cmd == SNDRV_PCM_TRIGGER_STOP)
 549                 snd_via82xx_channel_reset(chip, viadev);
 550         return 0;
 551 }
 552
 553 /*
 554  * pointer callbacks
 555  */
 556
 557 /*
 558  * calculate the linear position at the given sg-buffer index and the rest count
 559  */
 560
 561 #define check_invalid_pos(viadev,pos) \
 562         ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 ||\
 563                                      viadev->lastpos < viadev->bufsize2))
 564
 565 static inline unsigned int calc_linear_pos(struct via82xx_modem *chip,
 566                                            struct viadev *viadev,
 567                                            unsigned int idx,
 568                                            unsigned int count)
 569 {
 570         unsigned int size, res;
 571
 572         size = viadev->idx_table[idx].size;
 573         res = viadev->idx_table[idx].offset + size - count;
 574
 575         /* check the validity of the calculated position */
 576         if (size < count) {
 577                 dev_err(chip->card->dev,
 578                         "invalid via82xx_cur_ptr (size = %d, count = %d)\n",
 579                            (int)size, (int)count);
 580                 res = viadev->lastpos;
 581         } else if (check_invalid_pos(viadev, res)) {
 582 #ifdef POINTER_DEBUG
 583                 dev_dbg(chip->card->dev,
 584                         "fail: idx = %i/%i, lastpos = 0x%x, bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, count = 0x%x\n",
 585                         idx, viadev->tbl_entries, viadev->lastpos,
 586                        viadev->bufsize2, viadev->idx_table[idx].offset,
 587                        viadev->idx_table[idx].size, count);
 588 #endif
 589                 if (count && size < count) {
 590                         dev_dbg(chip->card->dev,
 591                                 "invalid via82xx_cur_ptr, using last valid pointer\n");
 592                         res = viadev->lastpos;
 593                 } else {
 594                         if (! count)
 595                                 /* bogus count 0 on the DMA boundary? */
 596                                 res = viadev->idx_table[idx].offset;
 597                         else
 598                                 /* count register returns full size
 599                                  * when end of buffer is reached
 600                                  */
 601                                 res = viadev->idx_table[idx].offset + size;
 602                         if (check_invalid_pos(viadev, res)) {
 603                                 dev_dbg(chip->card->dev,
 604                                         "invalid via82xx_cur_ptr (2), using last valid pointer\n");
 605                                 res = viadev->lastpos;
 606                         }
 607                 }
 608         }
 609         viadev->lastpos = res; /* remember the last position */
 610         if (res >= viadev->bufsize)
 611                 res -= viadev->bufsize;
 612         return res;
 613 }
 614
 615 /*
 616  * get the current pointer on via686
 617  */
 618 static snd_pcm_uframes_t snd_via686_pcm_pointer(struct snd_pcm_substream *substream)
 619 {
 620         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 621         struct viadev *viadev = substream->runtime->private_data;
 622         unsigned int idx, ptr, count, res;
 623
 624         if (snd_BUG_ON(!viadev->tbl_entries))
 625                 return 0;
 626         if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
 627                 return 0;
 628
 629         spin_lock(&chip->reg_lock);
 630         count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
 631         /* The via686a does not have the current index register,
 632          * so we need to calculate the index from CURR_PTR.
 633          */
 634         ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
 635         if (ptr <= (unsigned int)viadev->table.addr)
 636                 idx = 0;
 637         else /* CURR_PTR holds the address + 8 */
 638                 idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) %
 639                         viadev->tbl_entries;
 640         res = calc_linear_pos(chip, viadev, idx, count);
 641         spin_unlock(&chip->reg_lock);
 642
 643         return bytes_to_frames(substream->runtime, res);
 644 }
 645
 646 /*
 647  * hw_params callback:
 648  * allocate the buffer and build up the buffer description table
 649  */
 650 static int snd_via82xx_hw_params(struct snd_pcm_substream *substream,
 651                                  struct snd_pcm_hw_params *hw_params)
 652 {
 653         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 654         struct viadev *viadev = substream->runtime->private_data;
 655         int err;
 656
 657         err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 658         if (err < 0)
 659                 return err;
 660         err = build_via_table(viadev, substream, chip->pci,
 661                               params_periods(hw_params),
 662                               params_period_bytes(hw_params));
 663         if (err < 0)
 664                 return err;
 665
 666         snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params));
 667         snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0);
 668
 669         return 0;
 670 }
 671
 672 /*
 673  * hw_free callback:
 674  * clean up the buffer description table and release the buffer
 675  */
 676 static int snd_via82xx_hw_free(struct snd_pcm_substream *substream)
 677 {
 678         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 679         struct viadev *viadev = substream->runtime->private_data;
 680
 681         clean_via_table(viadev, substream, chip->pci);
 682         snd_pcm_lib_free_pages(substream);
 683         return 0;
 684 }
 685
 686
 687 /*
 688  * set up the table pointer
 689  */
 690 static void snd_via82xx_set_table_ptr(struct via82xx_modem *chip, struct viadev *viadev)
 691 {
 692         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 693         outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
 694         udelay(20);
 695         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 696 }
 697
 698 /*
 699  * prepare callback for playback and capture
 700  */
 701 static int snd_via82xx_pcm_prepare(struct snd_pcm_substream *substream)
 702 {
 703         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 704         struct viadev *viadev = substream->runtime->private_data;
 705
 706         snd_via82xx_channel_reset(chip, viadev);
 707         /* this must be set after channel_reset */
 708         snd_via82xx_set_table_ptr(chip, viadev);
 709         outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG,
 710              VIADEV_REG(viadev, OFFSET_TYPE));
 711         return 0;
 712 }
 713
 714 /*
 715  * pcm hardware definition, identical for both playback and capture
 716  */
 717 static struct snd_pcm_hardware snd_via82xx_hw =
 718 {
 719         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 720                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 721                                  SNDRV_PCM_INFO_MMAP_VALID |
 722                                  /* SNDRV_PCM_INFO_RESUME | */
 723                                  SNDRV_PCM_INFO_PAUSE),
 724         .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
 725         .rates =                SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
 726         .rate_min =             8000,
 727         .rate_max =             16000,
 728         .channels_min =         1,
 729         .channels_max =         1,
 730         .buffer_bytes_max =     128 * 1024,
 731         .period_bytes_min =     32,
 732         .period_bytes_max =     128 * 1024,
 733         .periods_min =          2,
 734         .periods_max =          VIA_TABLE_SIZE / 2,
 735         .fifo_size =            0,
 736 };
 737
 738
 739 /*
 740  * open callback skeleton
 741  */
 742 static int snd_via82xx_modem_pcm_open(struct via82xx_modem *chip, struct viadev *viadev,
 743                                       struct snd_pcm_substream *substream)
 744 {
 745         struct snd_pcm_runtime *runtime = substream->runtime;
 746         int err;
 747         static unsigned int rates[] = { 8000,  9600, 12000, 16000 };
 748         static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
 749                 .count = ARRAY_SIZE(rates),
 750                 .list = rates,
 751                 .mask = 0,
 752         };
 753
 754         runtime->hw = snd_via82xx_hw;
 755
 756         if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 757                                               &hw_constraints_rates)) < 0)
 758                 return err;
 759
 760         /* we may remove following constaint when we modify table entries
 761            in interrupt */
 762         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 763                 return err;
 764
 765         runtime->private_data = viadev;
 766         viadev->substream = substream;
 767
 768         return 0;
 769 }
 770
 771
 772 /*
 773  * open callback for playback
 774  */
 775 static int snd_via82xx_playback_open(struct snd_pcm_substream *substream)
 776 {
 777         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 778         struct viadev *viadev = &chip->devs[chip->playback_devno + substream->number];
 779
 780         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 781 }
 782
 783 /*
 784  * open callback for capture
 785  */
 786 static int snd_via82xx_capture_open(struct snd_pcm_substream *substream)
 787 {
 788         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 789         struct viadev *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
 790
 791         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 792 }
 793
 794 /*
 795  * close callback
 796  */
 797 static int snd_via82xx_pcm_close(struct snd_pcm_substream *substream)
 798 {
 799         struct viadev *viadev = substream->runtime->private_data;
 800
 801         viadev->substream = NULL;
 802         return 0;
 803 }
 804
 805
 806 /* via686 playback callbacks */
 807 static struct snd_pcm_ops snd_via686_playback_ops = {
 808         .open =         snd_via82xx_playback_open,
 809         .close =        snd_via82xx_pcm_close,
 810         .ioctl =        snd_pcm_lib_ioctl,
 811         .hw_params =    snd_via82xx_hw_params,
 812         .hw_free =      snd_via82xx_hw_free,
 813         .prepare =      snd_via82xx_pcm_prepare,
 814         .trigger =      snd_via82xx_pcm_trigger,
 815         .pointer =      snd_via686_pcm_pointer,
 816         .page =         snd_pcm_sgbuf_ops_page,
 817 };
 818
 819 /* via686 capture callbacks */
 820 static struct snd_pcm_ops snd_via686_capture_ops = {
 821         .open =         snd_via82xx_capture_open,
 822         .close =        snd_via82xx_pcm_close,
 823         .ioctl =        snd_pcm_lib_ioctl,
 824         .hw_params =    snd_via82xx_hw_params,
 825         .hw_free =      snd_via82xx_hw_free,
 826         .prepare =      snd_via82xx_pcm_prepare,
 827         .trigger =      snd_via82xx_pcm_trigger,
 828         .pointer =      snd_via686_pcm_pointer,
 829         .page =         snd_pcm_sgbuf_ops_page,
 830 };
 831
 832
 833 static void init_viadev(struct via82xx_modem *chip, int idx, unsigned int reg_offset,
 834                         int direction)
 835 {
 836         chip->devs[idx].reg_offset = reg_offset;
 837         chip->devs[idx].direction = direction;
 838         chip->devs[idx].port = chip->port + reg_offset;
 839 }
 840
 841 /*
 842  * create a pcm instance for via686a/b
 843  */
 844 static int snd_via686_pcm_new(struct via82xx_modem *chip)
 845 {
 846         struct snd_pcm *pcm;
 847         int err;
 848
 849         chip->playback_devno = 0;
 850         chip->capture_devno = 1;
 851         chip->num_devs = 2;
 852         chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */
 853
 854         err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
 855         if (err < 0)
 856                 return err;
 857         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
 858         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
 859         pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
 860         pcm->private_data = chip;
 861         strcpy(pcm->name, chip->card->shortname);
 862         chip->pcms[0] = pcm;
 863         init_viadev(chip, 0, VIA_REG_MO_STATUS, 0);
 864         init_viadev(chip, 1, VIA_REG_MI_STATUS, 1);
 865
 866         if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
 867                                                          snd_dma_pci_data(chip->pci),
 868                                                          64*1024, 128*1024)) < 0)
 869                 return err;
 870
 871         return 0;
 872 }
 873
 874
 875 /*
 876  *  Mixer part
 877  */
 878
 879
 880 static void snd_via82xx_mixer_free_ac97_bus(struct snd_ac97_bus *bus)
 881 {
 882         struct via82xx_modem *chip = bus->private_data;
 883         chip->ac97_bus = NULL;
 884 }
 885
 886 static void snd_via82xx_mixer_free_ac97(struct snd_ac97 *ac97)
 887 {
 888         struct via82xx_modem *chip = ac97->private_data;
 889         chip->ac97 = NULL;
 890 }
 891
 892
 893 static int snd_via82xx_mixer_new(struct via82xx_modem *chip)
 894 {
 895         struct snd_ac97_template ac97;
 896         int err;
 897         static struct snd_ac97_bus_ops ops = {
 898                 .write = snd_via82xx_codec_write,
 899                 .read = snd_via82xx_codec_read,
 900                 .wait = snd_via82xx_codec_wait,
 901         };
 902
 903         if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
 904                 return err;
 905         chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
 906         chip->ac97_bus->clock = chip->ac97_clock;
 907
 908         memset(&ac97, 0, sizeof(ac97));
 909         ac97.private_data = chip;
 910         ac97.private_free = snd_via82xx_mixer_free_ac97;
 911         ac97.pci = chip->pci;
 912         ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;
 913         ac97.num = chip->ac97_secondary;
 914
 915         if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
 916                 return err;
 917
 918         return 0;
 919 }
 920
 921
 922 /*
 923  * proc interface
 924  */
 925 static void snd_via82xx_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
 926 {
 927         struct via82xx_modem *chip = entry->private_data;
 928         int i;
 929
 930         snd_iprintf(buffer, "%s\n\n", chip->card->longname);
 931         for (i = 0; i < 0xa0; i += 4) {
 932                 snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
 933         }
 934 }
 935
 936 static void snd_via82xx_proc_init(struct via82xx_modem *chip)
 937 {
 938         struct snd_info_entry *entry;
 939
 940         if (! snd_card_proc_new(chip->card, "via82xx", &entry))
 941                 snd_info_set_text_ops(entry, chip, snd_via82xx_proc_read);
 942 }
 943
 944 /*
 945  *
 946  */
 947
 948 static int snd_via82xx_chip_init(struct via82xx_modem *chip)
 949 {
 950         unsigned int val;
 951         unsigned long end_time;
 952         unsigned char pval;
 953
 954         pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval);
 955         if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) {
 956                 pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT);
 957                 udelay(100);
 958         }
 959
 960         pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 961         if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
 962                 /* deassert ACLink reset, force SYNC */
 963                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 964                                       VIA_ACLINK_CTRL_ENABLE |
 965                                       VIA_ACLINK_CTRL_RESET |
 966                                       VIA_ACLINK_CTRL_SYNC);
 967                 udelay(100);
 968 #if 1 /* FIXME: should we do full reset here for all chip models? */
 969                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
 970                 udelay(100);
 971 #else
 972                 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
 973                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 974                                       VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
 975                 udelay(2);
 976 #endif
 977                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 978                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 979                 udelay(100);
 980         }
 981
 982         pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
 983         if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
 984                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 985                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 986                 udelay(100);
 987         }
 988
 989         /* wait until codec ready */
 990         end_time = jiffies + msecs_to_jiffies(750);
 991         do {
 992                 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 993                 if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
 994                         break;
 995                 schedule_timeout_uninterruptible(1);
 996         } while (time_before(jiffies, end_time));
 997
 998         if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)
 999                 dev_err(chip->card->dev,
1000                         "AC'97 codec is not ready [0x%x]\n", val);
1001
1002         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
1003                                  VIA_REG_AC97_SECONDARY_VALID |
1004                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
1005         end_time = jiffies + msecs_to_jiffies(750);
1006         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
1007                                  VIA_REG_AC97_SECONDARY_VALID |
1008                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
1009         do {
1010                 if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) {
1011                         chip->ac97_secondary = 1;
1012                         goto __ac97_ok2;
1013                 }
1014                 schedule_timeout_uninterruptible(1);
1015         } while (time_before(jiffies, end_time));
1016         /* This is ok, the most of motherboards have only one codec */
1017
1018       __ac97_ok2:
1019
1020         /* route FM trap to IRQ, disable FM trap */
1021         // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
1022         /* disable all GPI interrupts */
1023         outl(0, VIAREG(chip, GPI_INTR));
1024
1025         return 0;
1026 }
1027
1028 #ifdef CONFIG_PM_SLEEP
1029 /*
1030  * power management
1031  */
1032 static int snd_via82xx_suspend(struct device *dev)
1033 {
1034         struct snd_card *card = dev_get_drvdata(dev);
1035         struct via82xx_modem *chip = card->private_data;
1036         int i;
1037
1038         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1039         for (i = 0; i < 2; i++)
1040                 snd_pcm_suspend_all(chip->pcms[i]);
1041         for (i = 0; i < chip->num_devs; i++)
1042                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1043         synchronize_irq(chip->irq);
1044         snd_ac97_suspend(chip->ac97);
1045         return 0;
1046 }
1047
1048 static int snd_via82xx_resume(struct device *dev)
1049 {
1050         struct snd_card *card = dev_get_drvdata(dev);
1051         struct via82xx_modem *chip = card->private_data;
1052         int i;
1053
1054         snd_via82xx_chip_init(chip);
1055
1056         snd_ac97_resume(chip->ac97);
1057
1058         for (i = 0; i < chip->num_devs; i++)
1059                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1060
1061         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1062         return 0;
1063 }
1064
1065 static SIMPLE_DEV_PM_OPS(snd_via82xx_pm, snd_via82xx_suspend, snd_via82xx_resume);
1066 #define SND_VIA82XX_PM_OPS      &snd_via82xx_pm
1067 #else
1068 #define SND_VIA82XX_PM_OPS      NULL
1069 #endif /* CONFIG_PM_SLEEP */
1070
1071 static int snd_via82xx_free(struct via82xx_modem *chip)
1072 {
1073         unsigned int i;
1074
1075         if (chip->irq < 0)
1076                 goto __end_hw;
1077         /* disable interrupts */
1078         for (i = 0; i < chip->num_devs; i++)
1079                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1080
1081       __end_hw:
1082         if (chip->irq >= 0)
1083                 free_irq(chip->irq, chip);
1084         pci_release_regions(chip->pci);
1085         pci_disable_device(chip->pci);
1086         kfree(chip);
1087         return 0;
1088 }
1089
1090 static int snd_via82xx_dev_free(struct snd_device *device)
1091 {
1092         struct via82xx_modem *chip = device->device_data;
1093         return snd_via82xx_free(chip);
1094 }
1095
1096 static int snd_via82xx_create(struct snd_card *card,
1097                               struct pci_dev *pci,
1098                               int chip_type,
1099                               int revision,
1100                               unsigned int ac97_clock,
1101                               struct via82xx_modem **r_via)
1102 {
1103         struct via82xx_modem *chip;
1104         int err;
1105         static struct snd_device_ops ops = {
1106                 .dev_free =     snd_via82xx_dev_free,
1107         };
1108
1109         if ((err = pci_enable_device(pci)) < 0)
1110                 return err;
1111
1112         if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) {
1113                 pci_disable_device(pci);
1114                 return -ENOMEM;
1115         }
1116
1117         spin_lock_init(&chip->reg_lock);
1118         chip->card = card;
1119         chip->pci = pci;
1120         chip->irq = -1;
1121
1122         if ((err = pci_request_regions(pci, card->driver)) < 0) {
1123                 kfree(chip);
1124                 pci_disable_device(pci);
1125                 return err;
1126         }
1127         chip->port = pci_resource_start(pci, 0);
1128         if (request_irq(pci->irq, snd_via82xx_interrupt, IRQF_SHARED,
1129                         KBUILD_MODNAME, chip)) {
1130                 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
1131                 snd_via82xx_free(chip);
1132                 return -EBUSY;
1133         }
1134         chip->irq = pci->irq;
1135         if (ac97_clock >= 8000 && ac97_clock <= 48000)
1136                 chip->ac97_clock = ac97_clock;
1137         synchronize_irq(chip->irq);
1138
1139         if ((err = snd_via82xx_chip_init(chip)) < 0) {
1140                 snd_via82xx_free(chip);
1141                 return err;
1142         }
1143
1144         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1145                 snd_via82xx_free(chip);
1146                 return err;
1147         }
1148
1149         /* The 8233 ac97 controller does not implement the master bit
1150          * in the pci command register. IMHO this is a violation of the PCI spec.
1151          * We call pci_set_master here because it does not hurt. */
1152         pci_set_master(pci);
1153
1154         *r_via = chip;
1155         return 0;
1156 }
1157
1158
1159 static int snd_via82xx_probe(struct pci_dev *pci,
1160                              const struct pci_device_id *pci_id)
1161 {
1162         struct snd_card *card;
1163         struct via82xx_modem *chip;
1164         int chip_type = 0, card_type;
1165         unsigned int i;
1166         int err;
1167
1168         err = snd_card_new(&pci->dev, index, id, THIS_MODULE, 0, &card);
1169         if (err < 0)
1170                 return err;
1171
1172         card_type = pci_id->driver_data;
1173         switch (card_type) {
1174         case TYPE_CARD_VIA82XX_MODEM:
1175                 strcpy(card->driver, "VIA82XX-MODEM");
1176                 sprintf(card->shortname, "VIA 82XX modem");
1177                 break;
1178         default:
1179                 dev_err(card->dev, "invalid card type %d\n", card_type);
1180                 err = -EINVAL;
1181                 goto __error;
1182         }
1183
1184         if ((err = snd_via82xx_create(card, pci, chip_type, pci->revision,
1185                                       ac97_clock, &chip)) < 0)
1186                 goto __error;
1187         card->private_data = chip;
1188         if ((err = snd_via82xx_mixer_new(chip)) < 0)
1189                 goto __error;
1190
1191         if ((err = snd_via686_pcm_new(chip)) < 0 )
1192                 goto __error;
1193
1194         /* disable interrupts */
1195         for (i = 0; i < chip->num_devs; i++)
1196                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1197
1198         sprintf(card->longname, "%s at 0x%lx, irq %d",
1199                 card->shortname, chip->port, chip->irq);
1200
1201         snd_via82xx_proc_init(chip);
1202
1203         if ((err = snd_card_register(card)) < 0) {
1204                 snd_card_free(card);
1205                 return err;
1206         }
1207         pci_set_drvdata(pci, card);
1208         return 0;
1209
1210  __error:
1211         snd_card_free(card);
1212         return err;
1213 }
1214
1215 static void snd_via82xx_remove(struct pci_dev *pci)
1216 {
1217         snd_card_free(pci_get_drvdata(pci));
1218 }
1219
1220 static struct pci_driver via82xx_modem_driver = {
1221         .name = KBUILD_MODNAME,
1222         .id_table = snd_via82xx_modem_ids,
1223         .probe = snd_via82xx_probe,
1224         .remove = snd_via82xx_remove,
1225         .driver = {
1226                 .pm = SND_VIA82XX_PM_OPS,
1227         },
1228 };
1229
1230 module_pci_driver(via82xx_modem_driver);