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_array(VIA_TABLE_SIZE,
 296                                                sizeof(*dev->idx_table),
 297                                                GFP_KERNEL);
 298                 if (! dev->idx_table)
 299                         return -ENOMEM;
 300         }
 301
 302         /* fill the entries */
 303         idx = 0;
 304         ofs = 0;
 305         for (i = 0; i < periods; i++) {
 306                 rest = fragsize;
 307                 /* fill descriptors for a period.
 308                  * a period can be split to several descriptors if it's
 309                  * over page boundary.
 310                  */
 311                 do {
 312                         unsigned int r;
 313                         unsigned int flag;
 314                         unsigned int addr;
 315
 316                         if (idx >= VIA_TABLE_SIZE) {
 317                                 dev_err(&pci->dev, "too much table size!\n");
 318                                 return -EINVAL;
 319                         }
 320                         addr = snd_pcm_sgbuf_get_addr(substream, ofs);
 321                         ((u32 *)dev->table.area)[idx << 1] = cpu_to_le32(addr);
 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                         /*
 334                         dev_dbg(&pci->dev,
 335                                 "tbl %d: at %d  size %d (rest %d)\n",
 336                                 idx, ofs, r, rest);
 337                         */
 338                         ((u32 *)dev->table.area)[(idx<<1) + 1] = cpu_to_le32(r | flag);
 339                         dev->idx_table[idx].offset = ofs;
 340                         dev->idx_table[idx].size = r;
 341                         ofs += r;
 342                         idx++;
 343                 } while (rest > 0);
 344         }
 345         dev->tbl_entries = idx;
 346         dev->bufsize = periods * fragsize;
 347         dev->bufsize2 = dev->bufsize / 2;
 348         return 0;
 349 }
 350
 351
 352 static int clean_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
 353                            struct pci_dev *pci)
 354 {
 355         if (dev->table.area) {
 356                 snd_dma_free_pages(&dev->table);
 357                 dev->table.area = NULL;
 358         }
 359         kfree(dev->idx_table);
 360         dev->idx_table = NULL;
 361         return 0;
 362 }
 363
 364 /*
 365  *  Basic I/O
 366  */
 367
 368 static inline unsigned int snd_via82xx_codec_xread(struct via82xx_modem *chip)
 369 {
 370         return inl(VIAREG(chip, AC97));
 371 }
 372
 373 static inline void snd_via82xx_codec_xwrite(struct via82xx_modem *chip, unsigned int val)
 374 {
 375         outl(val, VIAREG(chip, AC97));
 376 }
 377
 378 static int snd_via82xx_codec_ready(struct via82xx_modem *chip, int secondary)
 379 {
 380         unsigned int timeout = 1000;    /* 1ms */
 381         unsigned int val;
 382
 383         while (timeout-- > 0) {
 384                 udelay(1);
 385                 if (!((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY))
 386                         return val & 0xffff;
 387         }
 388         dev_err(chip->card->dev, "codec_ready: codec %i is not ready [0x%x]\n",
 389                    secondary, snd_via82xx_codec_xread(chip));
 390         return -EIO;
 391 }
 392
 393 static int snd_via82xx_codec_valid(struct via82xx_modem *chip, int secondary)
 394 {
 395         unsigned int timeout = 1000;    /* 1ms */
 396         unsigned int val, val1;
 397         unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
 398                                          VIA_REG_AC97_SECONDARY_VALID;
 399
 400         while (timeout-- > 0) {
 401                 val = snd_via82xx_codec_xread(chip);
 402                 val1 = val & (VIA_REG_AC97_BUSY | stat);
 403                 if (val1 == stat)
 404                         return val & 0xffff;
 405                 udelay(1);
 406         }
 407         return -EIO;
 408 }
 409
 410 static void snd_via82xx_codec_wait(struct snd_ac97 *ac97)
 411 {
 412         struct via82xx_modem *chip = ac97->private_data;
 413         int err;
 414         err = snd_via82xx_codec_ready(chip, ac97->num);
 415         /* here we need to wait fairly for long time.. */
 416         msleep(500);
 417 }
 418
 419 static void snd_via82xx_codec_write(struct snd_ac97 *ac97,
 420                                     unsigned short reg,
 421                                     unsigned short val)
 422 {
 423         struct via82xx_modem *chip = ac97->private_data;
 424         unsigned int xval;
 425         if(reg == AC97_GPIO_STATUS) {
 426                 outl(val, VIAREG(chip, GPI_STATUS));
 427                 return;
 428         }
 429         xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
 430         xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
 431         xval |= reg << VIA_REG_AC97_CMD_SHIFT;
 432         xval |= val << VIA_REG_AC97_DATA_SHIFT;
 433         snd_via82xx_codec_xwrite(chip, xval);
 434         snd_via82xx_codec_ready(chip, ac97->num);
 435 }
 436
 437 static unsigned short snd_via82xx_codec_read(struct snd_ac97 *ac97, unsigned short reg)
 438 {
 439         struct via82xx_modem *chip = ac97->private_data;
 440         unsigned int xval, val = 0xffff;
 441         int again = 0;
 442
 443         xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
 444         xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
 445         xval |= VIA_REG_AC97_READ;
 446         xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
 447         while (1) {
 448                 if (again++ > 3) {
 449                         dev_err(chip->card->dev,
 450                                 "codec_read: codec %i is not valid [0x%x]\n",
 451                                    ac97->num, snd_via82xx_codec_xread(chip));
 452                         return 0xffff;
 453                 }
 454                 snd_via82xx_codec_xwrite(chip, xval);
 455                 udelay (20);
 456                 if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) {
 457                         udelay(25);
 458                         val = snd_via82xx_codec_xread(chip);
 459                         break;
 460                 }
 461         }
 462         return val & 0xffff;
 463 }
 464
 465 static void snd_via82xx_channel_reset(struct via82xx_modem *chip, struct viadev *viadev)
 466 {
 467         outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET,
 468              VIADEV_REG(viadev, OFFSET_CONTROL));
 469         inb(VIADEV_REG(viadev, OFFSET_CONTROL));
 470         udelay(50);
 471         /* disable interrupts */
 472         outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL));
 473         /* clear interrupts */
 474         outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS));
 475         outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */
 476         // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
 477         viadev->lastpos = 0;
 478 }
 479
 480
 481 /*
 482  *  Interrupt handler
 483  */
 484
 485 static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id)
 486 {
 487         struct via82xx_modem *chip = dev_id;
 488         unsigned int status;
 489         unsigned int i;
 490
 491         status = inl(VIAREG(chip, SGD_SHADOW));
 492         if (! (status & chip->intr_mask)) {
 493                 return IRQ_NONE;
 494         }
 495 // _skip_sgd:
 496
 497         /* check status for each stream */
 498         spin_lock(&chip->reg_lock);
 499         for (i = 0; i < chip->num_devs; i++) {
 500                 struct viadev *viadev = &chip->devs[i];
 501                 unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
 502                 c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED);
 503                 if (! c_status)
 504                         continue;
 505                 if (viadev->substream && viadev->running) {
 506                         spin_unlock(&chip->reg_lock);
 507                         snd_pcm_period_elapsed(viadev->substream);
 508                         spin_lock(&chip->reg_lock);
 509                 }
 510                 outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
 511         }
 512         spin_unlock(&chip->reg_lock);
 513         return IRQ_HANDLED;
 514 }
 515
 516 /*
 517  *  PCM callbacks
 518  */
 519
 520 /*
 521  * trigger callback
 522  */
 523 static int snd_via82xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 524 {
 525         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 526         struct viadev *viadev = substream->runtime->private_data;
 527         unsigned char val = 0;
 528
 529         switch (cmd) {
 530         case SNDRV_PCM_TRIGGER_START:
 531         case SNDRV_PCM_TRIGGER_SUSPEND:
 532                 val |= VIA_REG_CTRL_START;
 533                 viadev->running = 1;
 534                 break;
 535         case SNDRV_PCM_TRIGGER_STOP:
 536                 val = VIA_REG_CTRL_TERMINATE;
 537                 viadev->running = 0;
 538                 break;
 539         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 540                 val |= VIA_REG_CTRL_PAUSE;
 541                 viadev->running = 0;
 542                 break;
 543         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 544                 viadev->running = 1;
 545                 break;
 546         default:
 547                 return -EINVAL;
 548         }
 549         outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
 550         if (cmd == SNDRV_PCM_TRIGGER_STOP)
 551                 snd_via82xx_channel_reset(chip, viadev);
 552         return 0;
 553 }
 554
 555 /*
 556  * pointer callbacks
 557  */
 558
 559 /*
 560  * calculate the linear position at the given sg-buffer index and the rest count
 561  */
 562
 563 #define check_invalid_pos(viadev,pos) \
 564         ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 ||\
 565                                      viadev->lastpos < viadev->bufsize2))
 566
 567 static inline unsigned int calc_linear_pos(struct via82xx_modem *chip,
 568                                            struct viadev *viadev,
 569                                            unsigned int idx,
 570                                            unsigned int count)
 571 {
 572         unsigned int size, res;
 573
 574         size = viadev->idx_table[idx].size;
 575         res = viadev->idx_table[idx].offset + size - count;
 576
 577         /* check the validity of the calculated position */
 578         if (size < count) {
 579                 dev_err(chip->card->dev,
 580                         "invalid via82xx_cur_ptr (size = %d, count = %d)\n",
 581                            (int)size, (int)count);
 582                 res = viadev->lastpos;
 583         } else if (check_invalid_pos(viadev, res)) {
 584 #ifdef POINTER_DEBUG
 585                 dev_dbg(chip->card->dev,
 586                         "fail: idx = %i/%i, lastpos = 0x%x, bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, count = 0x%x\n",
 587                         idx, viadev->tbl_entries, viadev->lastpos,
 588                        viadev->bufsize2, viadev->idx_table[idx].offset,
 589                        viadev->idx_table[idx].size, count);
 590 #endif
 591                 if (count && size < count) {
 592                         dev_dbg(chip->card->dev,
 593                                 "invalid via82xx_cur_ptr, using last valid pointer\n");
 594                         res = viadev->lastpos;
 595                 } else {
 596                         if (! count)
 597                                 /* bogus count 0 on the DMA boundary? */
 598                                 res = viadev->idx_table[idx].offset;
 599                         else
 600                                 /* count register returns full size
 601                                  * when end of buffer is reached
 602                                  */
 603                                 res = viadev->idx_table[idx].offset + size;
 604                         if (check_invalid_pos(viadev, res)) {
 605                                 dev_dbg(chip->card->dev,
 606                                         "invalid via82xx_cur_ptr (2), using last valid pointer\n");
 607                                 res = viadev->lastpos;
 608                         }
 609                 }
 610         }
 611         viadev->lastpos = res; /* remember the last position */
 612         if (res >= viadev->bufsize)
 613                 res -= viadev->bufsize;
 614         return res;
 615 }
 616
 617 /*
 618  * get the current pointer on via686
 619  */
 620 static snd_pcm_uframes_t snd_via686_pcm_pointer(struct snd_pcm_substream *substream)
 621 {
 622         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 623         struct viadev *viadev = substream->runtime->private_data;
 624         unsigned int idx, ptr, count, res;
 625
 626         if (snd_BUG_ON(!viadev->tbl_entries))
 627                 return 0;
 628         if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
 629                 return 0;
 630
 631         spin_lock(&chip->reg_lock);
 632         count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
 633         /* The via686a does not have the current index register,
 634          * so we need to calculate the index from CURR_PTR.
 635          */
 636         ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
 637         if (ptr <= (unsigned int)viadev->table.addr)
 638                 idx = 0;
 639         else /* CURR_PTR holds the address + 8 */
 640                 idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) %
 641                         viadev->tbl_entries;
 642         res = calc_linear_pos(chip, viadev, idx, count);
 643         spin_unlock(&chip->reg_lock);
 644
 645         return bytes_to_frames(substream->runtime, res);
 646 }
 647
 648 /*
 649  * hw_params callback:
 650  * allocate the buffer and build up the buffer description table
 651  */
 652 static int snd_via82xx_hw_params(struct snd_pcm_substream *substream,
 653                                  struct snd_pcm_hw_params *hw_params)
 654 {
 655         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 656         struct viadev *viadev = substream->runtime->private_data;
 657         int err;
 658
 659         err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 660         if (err < 0)
 661                 return err;
 662         err = build_via_table(viadev, substream, chip->pci,
 663                               params_periods(hw_params),
 664                               params_period_bytes(hw_params));
 665         if (err < 0)
 666                 return err;
 667
 668         snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params));
 669         snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0);
 670
 671         return 0;
 672 }
 673
 674 /*
 675  * hw_free callback:
 676  * clean up the buffer description table and release the buffer
 677  */
 678 static int snd_via82xx_hw_free(struct snd_pcm_substream *substream)
 679 {
 680         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 681         struct viadev *viadev = substream->runtime->private_data;
 682
 683         clean_via_table(viadev, substream, chip->pci);
 684         snd_pcm_lib_free_pages(substream);
 685         return 0;
 686 }
 687
 688
 689 /*
 690  * set up the table pointer
 691  */
 692 static void snd_via82xx_set_table_ptr(struct via82xx_modem *chip, struct viadev *viadev)
 693 {
 694         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 695         outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
 696         udelay(20);
 697         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 698 }
 699
 700 /*
 701  * prepare callback for playback and capture
 702  */
 703 static int snd_via82xx_pcm_prepare(struct snd_pcm_substream *substream)
 704 {
 705         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 706         struct viadev *viadev = substream->runtime->private_data;
 707
 708         snd_via82xx_channel_reset(chip, viadev);
 709         /* this must be set after channel_reset */
 710         snd_via82xx_set_table_ptr(chip, viadev);
 711         outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG,
 712              VIADEV_REG(viadev, OFFSET_TYPE));
 713         return 0;
 714 }
 715
 716 /*
 717  * pcm hardware definition, identical for both playback and capture
 718  */
 719 static const struct snd_pcm_hardware snd_via82xx_hw =
 720 {
 721         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 722                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 723                                  SNDRV_PCM_INFO_MMAP_VALID |
 724                                  /* SNDRV_PCM_INFO_RESUME | */
 725                                  SNDRV_PCM_INFO_PAUSE),
 726         .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
 727         .rates =                SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
 728         .rate_min =             8000,
 729         .rate_max =             16000,
 730         .channels_min =         1,
 731         .channels_max =         1,
 732         .buffer_bytes_max =     128 * 1024,
 733         .period_bytes_min =     32,
 734         .period_bytes_max =     128 * 1024,
 735         .periods_min =          2,
 736         .periods_max =          VIA_TABLE_SIZE / 2,
 737         .fifo_size =            0,
 738 };
 739
 740
 741 /*
 742  * open callback skeleton
 743  */
 744 static int snd_via82xx_modem_pcm_open(struct via82xx_modem *chip, struct viadev *viadev,
 745                                       struct snd_pcm_substream *substream)
 746 {
 747         struct snd_pcm_runtime *runtime = substream->runtime;
 748         int err;
 749         static const unsigned int rates[] = { 8000,  9600, 12000, 16000 };
 750         static const struct snd_pcm_hw_constraint_list hw_constraints_rates = {
 751                 .count = ARRAY_SIZE(rates),
 752                 .list = rates,
 753                 .mask = 0,
 754         };
 755
 756         runtime->hw = snd_via82xx_hw;
 757
 758         if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 759                                               &hw_constraints_rates)) < 0)
 760                 return err;
 761
 762         /* we may remove following constaint when we modify table entries
 763            in interrupt */
 764         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 765                 return err;
 766
 767         runtime->private_data = viadev;
 768         viadev->substream = substream;
 769
 770         return 0;
 771 }
 772
 773
 774 /*
 775  * open callback for playback
 776  */
 777 static int snd_via82xx_playback_open(struct snd_pcm_substream *substream)
 778 {
 779         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 780         struct viadev *viadev = &chip->devs[chip->playback_devno + substream->number];
 781
 782         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 783 }
 784
 785 /*
 786  * open callback for capture
 787  */
 788 static int snd_via82xx_capture_open(struct snd_pcm_substream *substream)
 789 {
 790         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 791         struct viadev *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
 792
 793         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 794 }
 795
 796 /*
 797  * close callback
 798  */
 799 static int snd_via82xx_pcm_close(struct snd_pcm_substream *substream)
 800 {
 801         struct viadev *viadev = substream->runtime->private_data;
 802
 803         viadev->substream = NULL;
 804         return 0;
 805 }
 806
 807
 808 /* via686 playback callbacks */
 809 static const struct snd_pcm_ops snd_via686_playback_ops = {
 810         .open =         snd_via82xx_playback_open,
 811         .close =        snd_via82xx_pcm_close,
 812         .ioctl =        snd_pcm_lib_ioctl,
 813         .hw_params =    snd_via82xx_hw_params,
 814         .hw_free =      snd_via82xx_hw_free,
 815         .prepare =      snd_via82xx_pcm_prepare,
 816         .trigger =      snd_via82xx_pcm_trigger,
 817         .pointer =      snd_via686_pcm_pointer,
 818         .page =         snd_pcm_sgbuf_ops_page,
 819 };
 820
 821 /* via686 capture callbacks */
 822 static const struct snd_pcm_ops snd_via686_capture_ops = {
 823         .open =         snd_via82xx_capture_open,
 824         .close =        snd_via82xx_pcm_close,
 825         .ioctl =        snd_pcm_lib_ioctl,
 826         .hw_params =    snd_via82xx_hw_params,
 827         .hw_free =      snd_via82xx_hw_free,
 828         .prepare =      snd_via82xx_pcm_prepare,
 829         .trigger =      snd_via82xx_pcm_trigger,
 830         .pointer =      snd_via686_pcm_pointer,
 831         .page =         snd_pcm_sgbuf_ops_page,
 832 };
 833
 834
 835 static void init_viadev(struct via82xx_modem *chip, int idx, unsigned int reg_offset,
 836                         int direction)
 837 {
 838         chip->devs[idx].reg_offset = reg_offset;
 839         chip->devs[idx].direction = direction;
 840         chip->devs[idx].port = chip->port + reg_offset;
 841 }
 842
 843 /*
 844  * create a pcm instance for via686a/b
 845  */
 846 static int snd_via686_pcm_new(struct via82xx_modem *chip)
 847 {
 848         struct snd_pcm *pcm;
 849         int err;
 850
 851         chip->playback_devno = 0;
 852         chip->capture_devno = 1;
 853         chip->num_devs = 2;
 854         chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */
 855
 856         err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
 857         if (err < 0)
 858                 return err;
 859         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
 860         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
 861         pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
 862         pcm->private_data = chip;
 863         strcpy(pcm->name, chip->card->shortname);
 864         chip->pcms[0] = pcm;
 865         init_viadev(chip, 0, VIA_REG_MO_STATUS, 0);
 866         init_viadev(chip, 1, VIA_REG_MI_STATUS, 1);
 867
 868         if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
 869                                                          snd_dma_pci_data(chip->pci),
 870                                                          64*1024, 128*1024)) < 0)
 871                 return err;
 872
 873         return 0;
 874 }
 875
 876
 877 /*
 878  *  Mixer part
 879  */
 880
 881
 882 static void snd_via82xx_mixer_free_ac97_bus(struct snd_ac97_bus *bus)
 883 {
 884         struct via82xx_modem *chip = bus->private_data;
 885         chip->ac97_bus = NULL;
 886 }
 887
 888 static void snd_via82xx_mixer_free_ac97(struct snd_ac97 *ac97)
 889 {
 890         struct via82xx_modem *chip = ac97->private_data;
 891         chip->ac97 = NULL;
 892 }
 893
 894
 895 static int snd_via82xx_mixer_new(struct via82xx_modem *chip)
 896 {
 897         struct snd_ac97_template ac97;
 898         int err;
 899         static struct snd_ac97_bus_ops ops = {
 900                 .write = snd_via82xx_codec_write,
 901                 .read = snd_via82xx_codec_read,
 902                 .wait = snd_via82xx_codec_wait,
 903         };
 904
 905         if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
 906                 return err;
 907         chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
 908         chip->ac97_bus->clock = chip->ac97_clock;
 909
 910         memset(&ac97, 0, sizeof(ac97));
 911         ac97.private_data = chip;
 912         ac97.private_free = snd_via82xx_mixer_free_ac97;
 913         ac97.pci = chip->pci;
 914         ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;
 915         ac97.num = chip->ac97_secondary;
 916
 917         if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
 918                 return err;
 919
 920         return 0;
 921 }
 922
 923
 924 /*
 925  * proc interface
 926  */
 927 static void snd_via82xx_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
 928 {
 929         struct via82xx_modem *chip = entry->private_data;
 930         int i;
 931
 932         snd_iprintf(buffer, "%s\n\n", chip->card->longname);
 933         for (i = 0; i < 0xa0; i += 4) {
 934                 snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
 935         }
 936 }
 937
 938 static void snd_via82xx_proc_init(struct via82xx_modem *chip)
 939 {
 940         struct snd_info_entry *entry;
 941
 942         if (! snd_card_proc_new(chip->card, "via82xx", &entry))
 943                 snd_info_set_text_ops(entry, chip, snd_via82xx_proc_read);
 944 }
 945
 946 /*
 947  *
 948  */
 949
 950 static int snd_via82xx_chip_init(struct via82xx_modem *chip)
 951 {
 952         unsigned int val;
 953         unsigned long end_time;
 954         unsigned char pval;
 955
 956         pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval);
 957         if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) {
 958                 pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT);
 959                 udelay(100);
 960         }
 961
 962         pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 963         if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
 964                 /* deassert ACLink reset, force SYNC */
 965                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 966                                       VIA_ACLINK_CTRL_ENABLE |
 967                                       VIA_ACLINK_CTRL_RESET |
 968                                       VIA_ACLINK_CTRL_SYNC);
 969                 udelay(100);
 970 #if 1 /* FIXME: should we do full reset here for all chip models? */
 971                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
 972                 udelay(100);
 973 #else
 974                 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
 975                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 976                                       VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
 977                 udelay(2);
 978 #endif
 979                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 980                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 981                 udelay(100);
 982         }
 983
 984         pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
 985         if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
 986                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 987                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 988                 udelay(100);
 989         }
 990
 991         /* wait until codec ready */
 992         end_time = jiffies + msecs_to_jiffies(750);
 993         do {
 994                 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 995                 if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
 996                         break;
 997                 schedule_timeout_uninterruptible(1);
 998         } while (time_before(jiffies, end_time));
 999
1000         if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)
1001                 dev_err(chip->card->dev,
1002                         "AC'97 codec is not ready [0x%x]\n", val);
1003
1004         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
1005                                  VIA_REG_AC97_SECONDARY_VALID |
1006                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
1007         end_time = jiffies + msecs_to_jiffies(750);
1008         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
1009                                  VIA_REG_AC97_SECONDARY_VALID |
1010                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
1011         do {
1012                 if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) {
1013                         chip->ac97_secondary = 1;
1014                         goto __ac97_ok2;
1015                 }
1016                 schedule_timeout_uninterruptible(1);
1017         } while (time_before(jiffies, end_time));
1018         /* This is ok, the most of motherboards have only one codec */
1019
1020       __ac97_ok2:
1021
1022         /* route FM trap to IRQ, disable FM trap */
1023         // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
1024         /* disable all GPI interrupts */
1025         outl(0, VIAREG(chip, GPI_INTR));
1026
1027         return 0;
1028 }
1029
1030 #ifdef CONFIG_PM_SLEEP
1031 /*
1032  * power management
1033  */
1034 static int snd_via82xx_suspend(struct device *dev)
1035 {
1036         struct snd_card *card = dev_get_drvdata(dev);
1037         struct via82xx_modem *chip = card->private_data;
1038         int i;
1039
1040         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1041         for (i = 0; i < 2; i++)
1042                 snd_pcm_suspend_all(chip->pcms[i]);
1043         for (i = 0; i < chip->num_devs; i++)
1044                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1045         synchronize_irq(chip->irq);
1046         snd_ac97_suspend(chip->ac97);
1047         return 0;
1048 }
1049
1050 static int snd_via82xx_resume(struct device *dev)
1051 {
1052         struct snd_card *card = dev_get_drvdata(dev);
1053         struct via82xx_modem *chip = card->private_data;
1054         int i;
1055
1056         snd_via82xx_chip_init(chip);
1057
1058         snd_ac97_resume(chip->ac97);
1059
1060         for (i = 0; i < chip->num_devs; i++)
1061                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1062
1063         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1064         return 0;
1065 }
1066
1067 static SIMPLE_DEV_PM_OPS(snd_via82xx_pm, snd_via82xx_suspend, snd_via82xx_resume);
1068 #define SND_VIA82XX_PM_OPS      &snd_via82xx_pm
1069 #else
1070 #define SND_VIA82XX_PM_OPS      NULL
1071 #endif /* CONFIG_PM_SLEEP */
1072
1073 static int snd_via82xx_free(struct via82xx_modem *chip)
1074 {
1075         unsigned int i;
1076
1077         if (chip->irq < 0)
1078                 goto __end_hw;
1079         /* disable interrupts */
1080         for (i = 0; i < chip->num_devs; i++)
1081                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1082
1083       __end_hw:
1084         if (chip->irq >= 0)
1085                 free_irq(chip->irq, chip);
1086         pci_release_regions(chip->pci);
1087         pci_disable_device(chip->pci);
1088         kfree(chip);
1089         return 0;
1090 }
1091
1092 static int snd_via82xx_dev_free(struct snd_device *device)
1093 {
1094         struct via82xx_modem *chip = device->device_data;
1095         return snd_via82xx_free(chip);
1096 }
1097
1098 static int snd_via82xx_create(struct snd_card *card,
1099                               struct pci_dev *pci,
1100                               int chip_type,
1101                               int revision,
1102                               unsigned int ac97_clock,
1103                               struct via82xx_modem **r_via)
1104 {
1105         struct via82xx_modem *chip;
1106         int err;
1107         static struct snd_device_ops ops = {
1108                 .dev_free =     snd_via82xx_dev_free,
1109         };
1110
1111         if ((err = pci_enable_device(pci)) < 0)
1112                 return err;
1113
1114         if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) {
1115                 pci_disable_device(pci);
1116                 return -ENOMEM;
1117         }
1118
1119         spin_lock_init(&chip->reg_lock);
1120         chip->card = card;
1121         chip->pci = pci;
1122         chip->irq = -1;
1123
1124         if ((err = pci_request_regions(pci, card->driver)) < 0) {
1125                 kfree(chip);
1126                 pci_disable_device(pci);
1127                 return err;
1128         }
1129         chip->port = pci_resource_start(pci, 0);
1130         if (request_irq(pci->irq, snd_via82xx_interrupt, IRQF_SHARED,
1131                         KBUILD_MODNAME, chip)) {
1132                 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
1133                 snd_via82xx_free(chip);
1134                 return -EBUSY;
1135         }
1136         chip->irq = pci->irq;
1137         if (ac97_clock >= 8000 && ac97_clock <= 48000)
1138                 chip->ac97_clock = ac97_clock;
1139         synchronize_irq(chip->irq);
1140
1141         if ((err = snd_via82xx_chip_init(chip)) < 0) {
1142                 snd_via82xx_free(chip);
1143                 return err;
1144         }
1145
1146         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1147                 snd_via82xx_free(chip);
1148                 return err;
1149         }
1150
1151         /* The 8233 ac97 controller does not implement the master bit
1152          * in the pci command register. IMHO this is a violation of the PCI spec.
1153          * We call pci_set_master here because it does not hurt. */
1154         pci_set_master(pci);
1155
1156         *r_via = chip;
1157         return 0;
1158 }
1159
1160
1161 static int snd_via82xx_probe(struct pci_dev *pci,
1162                              const struct pci_device_id *pci_id)
1163 {
1164         struct snd_card *card;
1165         struct via82xx_modem *chip;
1166         int chip_type = 0, card_type;
1167         unsigned int i;
1168         int err;
1169
1170         err = snd_card_new(&pci->dev, index, id, THIS_MODULE, 0, &card);
1171         if (err < 0)
1172                 return err;
1173
1174         card_type = pci_id->driver_data;
1175         switch (card_type) {
1176         case TYPE_CARD_VIA82XX_MODEM:
1177                 strcpy(card->driver, "VIA82XX-MODEM");
1178                 sprintf(card->shortname, "VIA 82XX modem");
1179                 break;
1180         default:
1181                 dev_err(card->dev, "invalid card type %d\n", card_type);
1182                 err = -EINVAL;
1183                 goto __error;
1184         }
1185
1186         if ((err = snd_via82xx_create(card, pci, chip_type, pci->revision,
1187                                       ac97_clock, &chip)) < 0)
1188                 goto __error;
1189         card->private_data = chip;
1190         if ((err = snd_via82xx_mixer_new(chip)) < 0)
1191                 goto __error;
1192
1193         if ((err = snd_via686_pcm_new(chip)) < 0 )
1194                 goto __error;
1195
1196         /* disable interrupts */
1197         for (i = 0; i < chip->num_devs; i++)
1198                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1199
1200         sprintf(card->longname, "%s at 0x%lx, irq %d",
1201                 card->shortname, chip->port, chip->irq);
1202
1203         snd_via82xx_proc_init(chip);
1204
1205         if ((err = snd_card_register(card)) < 0) {
1206                 snd_card_free(card);
1207                 return err;
1208         }
1209         pci_set_drvdata(pci, card);
1210         return 0;
1211
1212  __error:
1213         snd_card_free(card);
1214         return err;
1215 }
1216
1217 static void snd_via82xx_remove(struct pci_dev *pci)
1218 {
1219         snd_card_free(pci_get_drvdata(pci));
1220 }
1221
1222 static struct pci_driver via82xx_modem_driver = {
1223         .name = KBUILD_MODNAME,
1224         .id_table = snd_via82xx_modem_ids,
1225         .probe = snd_via82xx_probe,
1226         .remove = snd_via82xx_remove,
1227         .driver = {
1228                 .pm = SND_VIA82XX_PM_OPS,
1229         },
1230 };
1231
1232 module_pci_driver(via82xx_modem_driver);