sound/pci/via82xx_modem.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   ALSA modem driver for VIA VT82xx (South Bridge)
   4  *
   5  *   VT82C686A/B/C, VT8233A/C, VT8235
   6  *
   7  *      Copyright (c) 2000 Jaroslav Kysela <perex@perex.cz>
   8  *                         Tjeerd.Mulder <Tjeerd.Mulder@fujitsu-siemens.com>
   9  *                    2002 Takashi Iwai <tiwai@suse.de>
  10  */
  11
  12 /*
  13  * Changes:
  14  *
  15  * Sep. 2,  2004  Sasha Khapyorsky <sashak@alsa-project.org>
  16  *      Modified from original audio driver 'via82xx.c' to support AC97
  17  *      modems.
  18  */
  19
  20 #include <linux/io.h>
  21 #include <linux/delay.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/init.h>
  24 #include <linux/pci.h>
  25 #include <linux/slab.h>
  26 #include <linux/module.h>
  27 #include <sound/core.h>
  28 #include <sound/pcm.h>
  29 #include <sound/pcm_params.h>
  30 #include <sound/info.h>
  31 #include <sound/ac97_codec.h>
  32 #include <sound/initval.h>
  33
  34 #if 0
  35 #define POINTER_DEBUG
  36 #endif
  37
  38 MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
  39 MODULE_DESCRIPTION("VIA VT82xx modem");
  40 MODULE_LICENSE("GPL");
  41 MODULE_SUPPORTED_DEVICE("{{VIA,VT82C686A/B/C modem,pci}}");
  42
  43 static int index = -2; /* Exclude the first card */
  44 static char *id = SNDRV_DEFAULT_STR1;   /* ID for this card */
  45 static int ac97_clock = 48000;
  46
  47 module_param(index, int, 0444);
  48 MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge.");
  49 module_param(id, charp, 0444);
  50 MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge.");
  51 module_param(ac97_clock, int, 0444);
  52 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
  53
  54 /* just for backward compatibility */
  55 static bool enable;
  56 module_param(enable, bool, 0444);
  57
  58
  59 /*
  60  *  Direct registers
  61  */
  62
  63 #define VIAREG(via, x) ((via)->port + VIA_REG_##x)
  64 #define VIADEV_REG(viadev, x) ((viadev)->port + VIA_REG_##x)
  65
  66 /* common offsets */
  67 #define VIA_REG_OFFSET_STATUS           0x00    /* byte - channel status */
  68 #define   VIA_REG_STAT_ACTIVE           0x80    /* RO */
  69 #define   VIA_REG_STAT_PAUSED           0x40    /* RO */
  70 #define   VIA_REG_STAT_TRIGGER_QUEUED   0x08    /* RO */
  71 #define   VIA_REG_STAT_STOPPED          0x04    /* RWC */
  72 #define   VIA_REG_STAT_EOL              0x02    /* RWC */
  73 #define   VIA_REG_STAT_FLAG             0x01    /* RWC */
  74 #define VIA_REG_OFFSET_CONTROL          0x01    /* byte - channel control */
  75 #define   VIA_REG_CTRL_START            0x80    /* WO */
  76 #define   VIA_REG_CTRL_TERMINATE        0x40    /* WO */
  77 #define   VIA_REG_CTRL_AUTOSTART        0x20
  78 #define   VIA_REG_CTRL_PAUSE            0x08    /* RW */
  79 #define   VIA_REG_CTRL_INT_STOP         0x04
  80 #define   VIA_REG_CTRL_INT_EOL          0x02
  81 #define   VIA_REG_CTRL_INT_FLAG         0x01
  82 #define   VIA_REG_CTRL_RESET            0x01    /* RW - probably reset? undocumented */
  83 #define   VIA_REG_CTRL_INT (VIA_REG_CTRL_INT_FLAG | VIA_REG_CTRL_INT_EOL | VIA_REG_CTRL_AUTOSTART)
  84 #define VIA_REG_OFFSET_TYPE             0x02    /* byte - channel type (686 only) */
  85 #define   VIA_REG_TYPE_AUTOSTART        0x80    /* RW - autostart at EOL */
  86 #define   VIA_REG_TYPE_16BIT            0x20    /* RW */
  87 #define   VIA_REG_TYPE_STEREO           0x10    /* RW */
  88 #define   VIA_REG_TYPE_INT_LLINE        0x00
  89 #define   VIA_REG_TYPE_INT_LSAMPLE      0x04
  90 #define   VIA_REG_TYPE_INT_LESSONE      0x08
  91 #define   VIA_REG_TYPE_INT_MASK         0x0c
  92 #define   VIA_REG_TYPE_INT_EOL          0x02
  93 #define   VIA_REG_TYPE_INT_FLAG         0x01
  94 #define VIA_REG_OFFSET_TABLE_PTR        0x04    /* dword - channel table pointer */
  95 #define VIA_REG_OFFSET_CURR_PTR         0x04    /* dword - channel current pointer */
  96 #define VIA_REG_OFFSET_STOP_IDX         0x08    /* dword - stop index, channel type, sample rate */
  97 #define VIA_REG_OFFSET_CURR_COUNT       0x0c    /* dword - channel current count (24 bit) */
  98 #define VIA_REG_OFFSET_CURR_INDEX       0x0f    /* byte - channel current index (for via8233 only) */
  99
 100 #define DEFINE_VIA_REGSET(name,val) \
 101 enum {\
 102         VIA_REG_##name##_STATUS         = (val),\
 103         VIA_REG_##name##_CONTROL        = (val) + 0x01,\
 104         VIA_REG_##name##_TYPE           = (val) + 0x02,\
 105         VIA_REG_##name##_TABLE_PTR      = (val) + 0x04,\
 106         VIA_REG_##name##_CURR_PTR       = (val) + 0x04,\
 107         VIA_REG_##name##_STOP_IDX       = (val) + 0x08,\
 108         VIA_REG_##name##_CURR_COUNT     = (val) + 0x0c,\
 109 }
 110
 111 /* modem block */
 112 DEFINE_VIA_REGSET(MO, 0x40);
 113 DEFINE_VIA_REGSET(MI, 0x50);
 114
 115 /* AC'97 */
 116 #define VIA_REG_AC97                    0x80    /* dword */
 117 #define   VIA_REG_AC97_CODEC_ID_MASK    (3<<30)
 118 #define   VIA_REG_AC97_CODEC_ID_SHIFT   30
 119 #define   VIA_REG_AC97_CODEC_ID_PRIMARY 0x00
 120 #define   VIA_REG_AC97_CODEC_ID_SECONDARY 0x01
 121 #define   VIA_REG_AC97_SECONDARY_VALID  (1<<27)
 122 #define   VIA_REG_AC97_PRIMARY_VALID    (1<<25)
 123 #define   VIA_REG_AC97_BUSY             (1<<24)
 124 #define   VIA_REG_AC97_READ             (1<<23)
 125 #define   VIA_REG_AC97_CMD_SHIFT        16
 126 #define   VIA_REG_AC97_CMD_MASK         0x7e
 127 #define   VIA_REG_AC97_DATA_SHIFT       0
 128 #define   VIA_REG_AC97_DATA_MASK        0xffff
 129
 130 #define VIA_REG_SGD_SHADOW              0x84    /* dword */
 131 #define   VIA_REG_SGD_STAT_PB_FLAG      (1<<0)
 132 #define   VIA_REG_SGD_STAT_CP_FLAG      (1<<1)
 133 #define   VIA_REG_SGD_STAT_FM_FLAG      (1<<2)
 134 #define   VIA_REG_SGD_STAT_PB_EOL       (1<<4)
 135 #define   VIA_REG_SGD_STAT_CP_EOL       (1<<5)
 136 #define   VIA_REG_SGD_STAT_FM_EOL       (1<<6)
 137 #define   VIA_REG_SGD_STAT_PB_STOP      (1<<8)
 138 #define   VIA_REG_SGD_STAT_CP_STOP      (1<<9)
 139 #define   VIA_REG_SGD_STAT_FM_STOP      (1<<10)
 140 #define   VIA_REG_SGD_STAT_PB_ACTIVE    (1<<12)
 141 #define   VIA_REG_SGD_STAT_CP_ACTIVE    (1<<13)
 142 #define   VIA_REG_SGD_STAT_FM_ACTIVE    (1<<14)
 143 #define   VIA_REG_SGD_STAT_MR_FLAG      (1<<16)
 144 #define   VIA_REG_SGD_STAT_MW_FLAG      (1<<17)
 145 #define   VIA_REG_SGD_STAT_MR_EOL       (1<<20)
 146 #define   VIA_REG_SGD_STAT_MW_EOL       (1<<21)
 147 #define   VIA_REG_SGD_STAT_MR_STOP      (1<<24)
 148 #define   VIA_REG_SGD_STAT_MW_STOP      (1<<25)
 149 #define   VIA_REG_SGD_STAT_MR_ACTIVE    (1<<28)
 150 #define   VIA_REG_SGD_STAT_MW_ACTIVE    (1<<29)
 151
 152 #define VIA_REG_GPI_STATUS              0x88
 153 #define VIA_REG_GPI_INTR                0x8c
 154
 155 #define VIA_TBL_BIT_FLAG        0x40000000
 156 #define VIA_TBL_BIT_EOL         0x80000000
 157
 158 /* pci space */
 159 #define VIA_ACLINK_STAT         0x40
 160 #define  VIA_ACLINK_C11_READY   0x20
 161 #define  VIA_ACLINK_C10_READY   0x10
 162 #define  VIA_ACLINK_C01_READY   0x04 /* secondary codec ready */
 163 #define  VIA_ACLINK_LOWPOWER    0x02 /* low-power state */
 164 #define  VIA_ACLINK_C00_READY   0x01 /* primary codec ready */
 165 #define VIA_ACLINK_CTRL         0x41
 166 #define  VIA_ACLINK_CTRL_ENABLE 0x80 /* 0: disable, 1: enable */
 167 #define  VIA_ACLINK_CTRL_RESET  0x40 /* 0: assert, 1: de-assert */
 168 #define  VIA_ACLINK_CTRL_SYNC   0x20 /* 0: release SYNC, 1: force SYNC hi */
 169 #define  VIA_ACLINK_CTRL_SDO    0x10 /* 0: release SDO, 1: force SDO hi */
 170 #define  VIA_ACLINK_CTRL_VRA    0x08 /* 0: disable VRA, 1: enable VRA */
 171 #define  VIA_ACLINK_CTRL_PCM    0x04 /* 0: disable PCM, 1: enable PCM */
 172 #define  VIA_ACLINK_CTRL_FM     0x02 /* via686 only */
 173 #define  VIA_ACLINK_CTRL_SB     0x01 /* via686 only */
 174 #define  VIA_ACLINK_CTRL_INIT   (VIA_ACLINK_CTRL_ENABLE|\
 175                                  VIA_ACLINK_CTRL_RESET|\
 176                                  VIA_ACLINK_CTRL_PCM)
 177 #define VIA_FUNC_ENABLE         0x42
 178 #define  VIA_FUNC_MIDI_PNP      0x80 /* FIXME: it's 0x40 in the datasheet! */
 179 #define  VIA_FUNC_MIDI_IRQMASK  0x40 /* FIXME: not documented! */
 180 #define  VIA_FUNC_RX2C_WRITE    0x20
 181 #define  VIA_FUNC_SB_FIFO_EMPTY 0x10
 182 #define  VIA_FUNC_ENABLE_GAME   0x08
 183 #define  VIA_FUNC_ENABLE_FM     0x04
 184 #define  VIA_FUNC_ENABLE_MIDI   0x02
 185 #define  VIA_FUNC_ENABLE_SB     0x01
 186 #define VIA_PNP_CONTROL         0x43
 187 #define VIA_MC97_CTRL           0x44
 188 #define  VIA_MC97_CTRL_ENABLE   0x80
 189 #define  VIA_MC97_CTRL_SECONDARY 0x40
 190 #define  VIA_MC97_CTRL_INIT     (VIA_MC97_CTRL_ENABLE|\
 191                                  VIA_MC97_CTRL_SECONDARY)
 192
 193
 194 /*
 195  * pcm stream
 196  */
 197
 198 struct snd_via_sg_table {
 199         unsigned int offset;
 200         unsigned int size;
 201 } ;
 202
 203 #define VIA_TABLE_SIZE  255
 204
 205 struct viadev {
 206         unsigned int reg_offset;
 207         unsigned long port;
 208         int direction;  /* playback = 0, capture = 1 */
 209         struct snd_pcm_substream *substream;
 210         int running;
 211         unsigned int tbl_entries; /* # descriptors */
 212         struct snd_dma_buffer table;
 213         struct snd_via_sg_table *idx_table;
 214         /* for recovery from the unexpected pointer */
 215         unsigned int lastpos;
 216         unsigned int bufsize;
 217         unsigned int bufsize2;
 218 };
 219
 220 enum { TYPE_CARD_VIA82XX_MODEM = 1 };
 221
 222 #define VIA_MAX_MODEM_DEVS      2
 223
 224 struct via82xx_modem {
 225         int irq;
 226
 227         unsigned long port;
 228
 229         unsigned int intr_mask; /* SGD_SHADOW mask to check interrupts */
 230
 231         struct pci_dev *pci;
 232         struct snd_card *card;
 233
 234         unsigned int num_devs;
 235         unsigned int playback_devno, capture_devno;
 236         struct viadev devs[VIA_MAX_MODEM_DEVS];
 237
 238         struct snd_pcm *pcms[2];
 239
 240         struct snd_ac97_bus *ac97_bus;
 241         struct snd_ac97 *ac97;
 242         unsigned int ac97_clock;
 243         unsigned int ac97_secondary;    /* secondary AC'97 codec is present */
 244
 245         spinlock_t reg_lock;
 246         struct snd_info_entry *proc_entry;
 247 };
 248
 249 static const struct pci_device_id snd_via82xx_modem_ids[] = {
 250         { PCI_VDEVICE(VIA, 0x3068), TYPE_CARD_VIA82XX_MODEM, },
 251         { 0, }
 252 };
 253
 254 MODULE_DEVICE_TABLE(pci, snd_via82xx_modem_ids);
 255
 256 /*
 257  */
 258
 259 /*
 260  * allocate and initialize the descriptor buffers
 261  * periods = number of periods
 262  * fragsize = period size in bytes
 263  */
 264 static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
 265                            struct pci_dev *pci,
 266                            unsigned int periods, unsigned int fragsize)
 267 {
 268         unsigned int i, idx, ofs, rest;
 269         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 270
 271         if (dev->table.area == NULL) {
 272                 /* the start of each lists must be aligned to 8 bytes,
 273                  * but the kernel pages are much bigger, so we don't care
 274                  */
 275                 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, &chip->pci->dev,
 276                                         PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8),
 277                                         &dev->table) < 0)
 278                         return -ENOMEM;
 279         }
 280         if (! dev->idx_table) {
 281                 dev->idx_table = kmalloc_array(VIA_TABLE_SIZE,
 282                                                sizeof(*dev->idx_table),
 283                                                GFP_KERNEL);
 284                 if (! dev->idx_table)
 285                         return -ENOMEM;
 286         }
 287
 288         /* fill the entries */
 289         idx = 0;
 290         ofs = 0;
 291         for (i = 0; i < periods; i++) {
 292                 rest = fragsize;
 293                 /* fill descriptors for a period.
 294                  * a period can be split to several descriptors if it's
 295                  * over page boundary.
 296                  */
 297                 do {
 298                         unsigned int r;
 299                         unsigned int flag;
 300                         unsigned int addr;
 301
 302                         if (idx >= VIA_TABLE_SIZE) {
 303                                 dev_err(&pci->dev, "too much table size!\n");
 304                                 return -EINVAL;
 305                         }
 306                         addr = snd_pcm_sgbuf_get_addr(substream, ofs);
 307                         ((u32 *)dev->table.area)[idx << 1] = cpu_to_le32(addr);
 308                         r = PAGE_SIZE - (ofs % PAGE_SIZE);
 309                         if (rest < r)
 310                                 r = rest;
 311                         rest -= r;
 312                         if (! rest) {
 313                                 if (i == periods - 1)
 314                                         flag = VIA_TBL_BIT_EOL; /* buffer boundary */
 315                                 else
 316                                         flag = VIA_TBL_BIT_FLAG; /* period boundary */
 317                         } else
 318                                 flag = 0; /* period continues to the next */
 319                         /*
 320                         dev_dbg(&pci->dev,
 321                                 "tbl %d: at %d  size %d (rest %d)\n",
 322                                 idx, ofs, r, rest);
 323                         */
 324                         ((u32 *)dev->table.area)[(idx<<1) + 1] = cpu_to_le32(r | flag);
 325                         dev->idx_table[idx].offset = ofs;
 326                         dev->idx_table[idx].size = r;
 327                         ofs += r;
 328                         idx++;
 329                 } while (rest > 0);
 330         }
 331         dev->tbl_entries = idx;
 332         dev->bufsize = periods * fragsize;
 333         dev->bufsize2 = dev->bufsize / 2;
 334         return 0;
 335 }
 336
 337
 338 static int clean_via_table(struct viadev *dev, struct snd_pcm_substream *substream,
 339                            struct pci_dev *pci)
 340 {
 341         if (dev->table.area) {
 342                 snd_dma_free_pages(&dev->table);
 343                 dev->table.area = NULL;
 344         }
 345         kfree(dev->idx_table);
 346         dev->idx_table = NULL;
 347         return 0;
 348 }
 349
 350 /*
 351  *  Basic I/O
 352  */
 353
 354 static inline unsigned int snd_via82xx_codec_xread(struct via82xx_modem *chip)
 355 {
 356         return inl(VIAREG(chip, AC97));
 357 }
 358
 359 static inline void snd_via82xx_codec_xwrite(struct via82xx_modem *chip, unsigned int val)
 360 {
 361         outl(val, VIAREG(chip, AC97));
 362 }
 363
 364 static int snd_via82xx_codec_ready(struct via82xx_modem *chip, int secondary)
 365 {
 366         unsigned int timeout = 1000;    /* 1ms */
 367         unsigned int val;
 368
 369         while (timeout-- > 0) {
 370                 udelay(1);
 371                 if (!((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY))
 372                         return val & 0xffff;
 373         }
 374         dev_err(chip->card->dev, "codec_ready: codec %i is not ready [0x%x]\n",
 375                    secondary, snd_via82xx_codec_xread(chip));
 376         return -EIO;
 377 }
 378
 379 static int snd_via82xx_codec_valid(struct via82xx_modem *chip, int secondary)
 380 {
 381         unsigned int timeout = 1000;    /* 1ms */
 382         unsigned int val, val1;
 383         unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
 384                                          VIA_REG_AC97_SECONDARY_VALID;
 385
 386         while (timeout-- > 0) {
 387                 val = snd_via82xx_codec_xread(chip);
 388                 val1 = val & (VIA_REG_AC97_BUSY | stat);
 389                 if (val1 == stat)
 390                         return val & 0xffff;
 391                 udelay(1);
 392         }
 393         return -EIO;
 394 }
 395
 396 static void snd_via82xx_codec_wait(struct snd_ac97 *ac97)
 397 {
 398         struct via82xx_modem *chip = ac97->private_data;
 399         int err;
 400         err = snd_via82xx_codec_ready(chip, ac97->num);
 401         /* here we need to wait fairly for long time.. */
 402         msleep(500);
 403 }
 404
 405 static void snd_via82xx_codec_write(struct snd_ac97 *ac97,
 406                                     unsigned short reg,
 407                                     unsigned short val)
 408 {
 409         struct via82xx_modem *chip = ac97->private_data;
 410         unsigned int xval;
 411         if(reg == AC97_GPIO_STATUS) {
 412                 outl(val, VIAREG(chip, GPI_STATUS));
 413                 return;
 414         }
 415         xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
 416         xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
 417         xval |= reg << VIA_REG_AC97_CMD_SHIFT;
 418         xval |= val << VIA_REG_AC97_DATA_SHIFT;
 419         snd_via82xx_codec_xwrite(chip, xval);
 420         snd_via82xx_codec_ready(chip, ac97->num);
 421 }
 422
 423 static unsigned short snd_via82xx_codec_read(struct snd_ac97 *ac97, unsigned short reg)
 424 {
 425         struct via82xx_modem *chip = ac97->private_data;
 426         unsigned int xval, val = 0xffff;
 427         int again = 0;
 428
 429         xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
 430         xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
 431         xval |= VIA_REG_AC97_READ;
 432         xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
 433         while (1) {
 434                 if (again++ > 3) {
 435                         dev_err(chip->card->dev,
 436                                 "codec_read: codec %i is not valid [0x%x]\n",
 437                                    ac97->num, snd_via82xx_codec_xread(chip));
 438                         return 0xffff;
 439                 }
 440                 snd_via82xx_codec_xwrite(chip, xval);
 441                 udelay (20);
 442                 if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) {
 443                         udelay(25);
 444                         val = snd_via82xx_codec_xread(chip);
 445                         break;
 446                 }
 447         }
 448         return val & 0xffff;
 449 }
 450
 451 static void snd_via82xx_channel_reset(struct via82xx_modem *chip, struct viadev *viadev)
 452 {
 453         outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET,
 454              VIADEV_REG(viadev, OFFSET_CONTROL));
 455         inb(VIADEV_REG(viadev, OFFSET_CONTROL));
 456         udelay(50);
 457         /* disable interrupts */
 458         outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL));
 459         /* clear interrupts */
 460         outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS));
 461         outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */
 462         // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
 463         viadev->lastpos = 0;
 464 }
 465
 466
 467 /*
 468  *  Interrupt handler
 469  */
 470
 471 static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id)
 472 {
 473         struct via82xx_modem *chip = dev_id;
 474         unsigned int status;
 475         unsigned int i;
 476
 477         status = inl(VIAREG(chip, SGD_SHADOW));
 478         if (! (status & chip->intr_mask)) {
 479                 return IRQ_NONE;
 480         }
 481 // _skip_sgd:
 482
 483         /* check status for each stream */
 484         spin_lock(&chip->reg_lock);
 485         for (i = 0; i < chip->num_devs; i++) {
 486                 struct viadev *viadev = &chip->devs[i];
 487                 unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
 488                 c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED);
 489                 if (! c_status)
 490                         continue;
 491                 if (viadev->substream && viadev->running) {
 492                         spin_unlock(&chip->reg_lock);
 493                         snd_pcm_period_elapsed(viadev->substream);
 494                         spin_lock(&chip->reg_lock);
 495                 }
 496                 outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
 497         }
 498         spin_unlock(&chip->reg_lock);
 499         return IRQ_HANDLED;
 500 }
 501
 502 /*
 503  *  PCM callbacks
 504  */
 505
 506 /*
 507  * trigger callback
 508  */
 509 static int snd_via82xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 510 {
 511         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 512         struct viadev *viadev = substream->runtime->private_data;
 513         unsigned char val = 0;
 514
 515         switch (cmd) {
 516         case SNDRV_PCM_TRIGGER_START:
 517         case SNDRV_PCM_TRIGGER_SUSPEND:
 518                 val |= VIA_REG_CTRL_START;
 519                 viadev->running = 1;
 520                 break;
 521         case SNDRV_PCM_TRIGGER_STOP:
 522                 val = VIA_REG_CTRL_TERMINATE;
 523                 viadev->running = 0;
 524                 break;
 525         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 526                 val |= VIA_REG_CTRL_PAUSE;
 527                 viadev->running = 0;
 528                 break;
 529         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 530                 viadev->running = 1;
 531                 break;
 532         default:
 533                 return -EINVAL;
 534         }
 535         outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
 536         if (cmd == SNDRV_PCM_TRIGGER_STOP)
 537                 snd_via82xx_channel_reset(chip, viadev);
 538         return 0;
 539 }
 540
 541 /*
 542  * pointer callbacks
 543  */
 544
 545 /*
 546  * calculate the linear position at the given sg-buffer index and the rest count
 547  */
 548
 549 #define check_invalid_pos(viadev,pos) \
 550         ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 ||\
 551                                      viadev->lastpos < viadev->bufsize2))
 552
 553 static inline unsigned int calc_linear_pos(struct via82xx_modem *chip,
 554                                            struct viadev *viadev,
 555                                            unsigned int idx,
 556                                            unsigned int count)
 557 {
 558         unsigned int size, res;
 559
 560         size = viadev->idx_table[idx].size;
 561         res = viadev->idx_table[idx].offset + size - count;
 562
 563         /* check the validity of the calculated position */
 564         if (size < count) {
 565                 dev_err(chip->card->dev,
 566                         "invalid via82xx_cur_ptr (size = %d, count = %d)\n",
 567                            (int)size, (int)count);
 568                 res = viadev->lastpos;
 569         } else if (check_invalid_pos(viadev, res)) {
 570 #ifdef POINTER_DEBUG
 571                 dev_dbg(chip->card->dev,
 572                         "fail: idx = %i/%i, lastpos = 0x%x, bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, count = 0x%x\n",
 573                         idx, viadev->tbl_entries, viadev->lastpos,
 574                        viadev->bufsize2, viadev->idx_table[idx].offset,
 575                        viadev->idx_table[idx].size, count);
 576 #endif
 577                 if (count && size < count) {
 578                         dev_dbg(chip->card->dev,
 579                                 "invalid via82xx_cur_ptr, using last valid pointer\n");
 580                         res = viadev->lastpos;
 581                 } else {
 582                         if (! count)
 583                                 /* bogus count 0 on the DMA boundary? */
 584                                 res = viadev->idx_table[idx].offset;
 585                         else
 586                                 /* count register returns full size
 587                                  * when end of buffer is reached
 588                                  */
 589                                 res = viadev->idx_table[idx].offset + size;
 590                         if (check_invalid_pos(viadev, res)) {
 591                                 dev_dbg(chip->card->dev,
 592                                         "invalid via82xx_cur_ptr (2), using last valid pointer\n");
 593                                 res = viadev->lastpos;
 594                         }
 595                 }
 596         }
 597         viadev->lastpos = res; /* remember the last position */
 598         if (res >= viadev->bufsize)
 599                 res -= viadev->bufsize;
 600         return res;
 601 }
 602
 603 /*
 604  * get the current pointer on via686
 605  */
 606 static snd_pcm_uframes_t snd_via686_pcm_pointer(struct snd_pcm_substream *substream)
 607 {
 608         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 609         struct viadev *viadev = substream->runtime->private_data;
 610         unsigned int idx, ptr, count, res;
 611
 612         if (snd_BUG_ON(!viadev->tbl_entries))
 613                 return 0;
 614         if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
 615                 return 0;
 616
 617         spin_lock(&chip->reg_lock);
 618         count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
 619         /* The via686a does not have the current index register,
 620          * so we need to calculate the index from CURR_PTR.
 621          */
 622         ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
 623         if (ptr <= (unsigned int)viadev->table.addr)
 624                 idx = 0;
 625         else /* CURR_PTR holds the address + 8 */
 626                 idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) %
 627                         viadev->tbl_entries;
 628         res = calc_linear_pos(chip, viadev, idx, count);
 629         spin_unlock(&chip->reg_lock);
 630
 631         return bytes_to_frames(substream->runtime, res);
 632 }
 633
 634 /*
 635  * hw_params callback:
 636  * allocate the buffer and build up the buffer description table
 637  */
 638 static int snd_via82xx_hw_params(struct snd_pcm_substream *substream,
 639                                  struct snd_pcm_hw_params *hw_params)
 640 {
 641         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 642         struct viadev *viadev = substream->runtime->private_data;
 643         int err;
 644
 645         err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 646         if (err < 0)
 647                 return err;
 648         err = build_via_table(viadev, substream, chip->pci,
 649                               params_periods(hw_params),
 650                               params_period_bytes(hw_params));
 651         if (err < 0)
 652                 return err;
 653
 654         snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params));
 655         snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0);
 656
 657         return 0;
 658 }
 659
 660 /*
 661  * hw_free callback:
 662  * clean up the buffer description table and release the buffer
 663  */
 664 static int snd_via82xx_hw_free(struct snd_pcm_substream *substream)
 665 {
 666         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 667         struct viadev *viadev = substream->runtime->private_data;
 668
 669         clean_via_table(viadev, substream, chip->pci);
 670         snd_pcm_lib_free_pages(substream);
 671         return 0;
 672 }
 673
 674
 675 /*
 676  * set up the table pointer
 677  */
 678 static void snd_via82xx_set_table_ptr(struct via82xx_modem *chip, struct viadev *viadev)
 679 {
 680         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 681         outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
 682         udelay(20);
 683         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 684 }
 685
 686 /*
 687  * prepare callback for playback and capture
 688  */
 689 static int snd_via82xx_pcm_prepare(struct snd_pcm_substream *substream)
 690 {
 691         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 692         struct viadev *viadev = substream->runtime->private_data;
 693
 694         snd_via82xx_channel_reset(chip, viadev);
 695         /* this must be set after channel_reset */
 696         snd_via82xx_set_table_ptr(chip, viadev);
 697         outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG,
 698              VIADEV_REG(viadev, OFFSET_TYPE));
 699         return 0;
 700 }
 701
 702 /*
 703  * pcm hardware definition, identical for both playback and capture
 704  */
 705 static const struct snd_pcm_hardware snd_via82xx_hw =
 706 {
 707         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 708                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 709                                  SNDRV_PCM_INFO_MMAP_VALID |
 710                                  /* SNDRV_PCM_INFO_RESUME | */
 711                                  SNDRV_PCM_INFO_PAUSE),
 712         .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
 713         .rates =                SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
 714         .rate_min =             8000,
 715         .rate_max =             16000,
 716         .channels_min =         1,
 717         .channels_max =         1,
 718         .buffer_bytes_max =     128 * 1024,
 719         .period_bytes_min =     32,
 720         .period_bytes_max =     128 * 1024,
 721         .periods_min =          2,
 722         .periods_max =          VIA_TABLE_SIZE / 2,
 723         .fifo_size =            0,
 724 };
 725
 726
 727 /*
 728  * open callback skeleton
 729  */
 730 static int snd_via82xx_modem_pcm_open(struct via82xx_modem *chip, struct viadev *viadev,
 731                                       struct snd_pcm_substream *substream)
 732 {
 733         struct snd_pcm_runtime *runtime = substream->runtime;
 734         int err;
 735         static const unsigned int rates[] = { 8000,  9600, 12000, 16000 };
 736         static const struct snd_pcm_hw_constraint_list hw_constraints_rates = {
 737                 .count = ARRAY_SIZE(rates),
 738                 .list = rates,
 739                 .mask = 0,
 740         };
 741
 742         runtime->hw = snd_via82xx_hw;
 743
 744         if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
 745                                               &hw_constraints_rates)) < 0)
 746                 return err;
 747
 748         /* we may remove following constaint when we modify table entries
 749            in interrupt */
 750         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 751                 return err;
 752
 753         runtime->private_data = viadev;
 754         viadev->substream = substream;
 755
 756         return 0;
 757 }
 758
 759
 760 /*
 761  * open callback for playback
 762  */
 763 static int snd_via82xx_playback_open(struct snd_pcm_substream *substream)
 764 {
 765         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 766         struct viadev *viadev = &chip->devs[chip->playback_devno + substream->number];
 767
 768         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 769 }
 770
 771 /*
 772  * open callback for capture
 773  */
 774 static int snd_via82xx_capture_open(struct snd_pcm_substream *substream)
 775 {
 776         struct via82xx_modem *chip = snd_pcm_substream_chip(substream);
 777         struct viadev *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
 778
 779         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 780 }
 781
 782 /*
 783  * close callback
 784  */
 785 static int snd_via82xx_pcm_close(struct snd_pcm_substream *substream)
 786 {
 787         struct viadev *viadev = substream->runtime->private_data;
 788
 789         viadev->substream = NULL;
 790         return 0;
 791 }
 792
 793
 794 /* via686 playback callbacks */
 795 static const struct snd_pcm_ops snd_via686_playback_ops = {
 796         .open =         snd_via82xx_playback_open,
 797         .close =        snd_via82xx_pcm_close,
 798         .ioctl =        snd_pcm_lib_ioctl,
 799         .hw_params =    snd_via82xx_hw_params,
 800         .hw_free =      snd_via82xx_hw_free,
 801         .prepare =      snd_via82xx_pcm_prepare,
 802         .trigger =      snd_via82xx_pcm_trigger,
 803         .pointer =      snd_via686_pcm_pointer,
 804 };
 805
 806 /* via686 capture callbacks */
 807 static const struct snd_pcm_ops snd_via686_capture_ops = {
 808         .open =         snd_via82xx_capture_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 };
 817
 818
 819 static void init_viadev(struct via82xx_modem *chip, int idx, unsigned int reg_offset,
 820                         int direction)
 821 {
 822         chip->devs[idx].reg_offset = reg_offset;
 823         chip->devs[idx].direction = direction;
 824         chip->devs[idx].port = chip->port + reg_offset;
 825 }
 826
 827 /*
 828  * create a pcm instance for via686a/b
 829  */
 830 static int snd_via686_pcm_new(struct via82xx_modem *chip)
 831 {
 832         struct snd_pcm *pcm;
 833         int err;
 834
 835         chip->playback_devno = 0;
 836         chip->capture_devno = 1;
 837         chip->num_devs = 2;
 838         chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */
 839
 840         err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
 841         if (err < 0)
 842                 return err;
 843         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
 844         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
 845         pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
 846         pcm->private_data = chip;
 847         strcpy(pcm->name, chip->card->shortname);
 848         chip->pcms[0] = pcm;
 849         init_viadev(chip, 0, VIA_REG_MO_STATUS, 0);
 850         init_viadev(chip, 1, VIA_REG_MI_STATUS, 1);
 851
 852         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
 853                                               &chip->pci->dev,
 854                                               64*1024, 128*1024);
 855         return 0;
 856 }
 857
 858
 859 /*
 860  *  Mixer part
 861  */
 862
 863
 864 static void snd_via82xx_mixer_free_ac97_bus(struct snd_ac97_bus *bus)
 865 {
 866         struct via82xx_modem *chip = bus->private_data;
 867         chip->ac97_bus = NULL;
 868 }
 869
 870 static void snd_via82xx_mixer_free_ac97(struct snd_ac97 *ac97)
 871 {
 872         struct via82xx_modem *chip = ac97->private_data;
 873         chip->ac97 = NULL;
 874 }
 875
 876
 877 static int snd_via82xx_mixer_new(struct via82xx_modem *chip)
 878 {
 879         struct snd_ac97_template ac97;
 880         int err;
 881         static struct snd_ac97_bus_ops ops = {
 882                 .write = snd_via82xx_codec_write,
 883                 .read = snd_via82xx_codec_read,
 884                 .wait = snd_via82xx_codec_wait,
 885         };
 886
 887         if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
 888                 return err;
 889         chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
 890         chip->ac97_bus->clock = chip->ac97_clock;
 891
 892         memset(&ac97, 0, sizeof(ac97));
 893         ac97.private_data = chip;
 894         ac97.private_free = snd_via82xx_mixer_free_ac97;
 895         ac97.pci = chip->pci;
 896         ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;
 897         ac97.num = chip->ac97_secondary;
 898
 899         if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
 900                 return err;
 901
 902         return 0;
 903 }
 904
 905
 906 /*
 907  * proc interface
 908  */
 909 static void snd_via82xx_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
 910 {
 911         struct via82xx_modem *chip = entry->private_data;
 912         int i;
 913
 914         snd_iprintf(buffer, "%s\n\n", chip->card->longname);
 915         for (i = 0; i < 0xa0; i += 4) {
 916                 snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
 917         }
 918 }
 919
 920 static void snd_via82xx_proc_init(struct via82xx_modem *chip)
 921 {
 922         snd_card_ro_proc_new(chip->card, "via82xx", chip,
 923                              snd_via82xx_proc_read);
 924 }
 925
 926 /*
 927  *
 928  */
 929
 930 static int snd_via82xx_chip_init(struct via82xx_modem *chip)
 931 {
 932         unsigned int val;
 933         unsigned long end_time;
 934         unsigned char pval;
 935
 936         pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval);
 937         if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) {
 938                 pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT);
 939                 udelay(100);
 940         }
 941
 942         pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 943         if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
 944                 /* deassert ACLink reset, force SYNC */
 945                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 946                                       VIA_ACLINK_CTRL_ENABLE |
 947                                       VIA_ACLINK_CTRL_RESET |
 948                                       VIA_ACLINK_CTRL_SYNC);
 949                 udelay(100);
 950 #if 1 /* FIXME: should we do full reset here for all chip models? */
 951                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
 952                 udelay(100);
 953 #else
 954                 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
 955                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 956                                       VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
 957                 udelay(2);
 958 #endif
 959                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 960                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 961                 udelay(100);
 962         }
 963
 964         pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
 965         if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
 966                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 967                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 968                 udelay(100);
 969         }
 970
 971         /* wait until codec ready */
 972         end_time = jiffies + msecs_to_jiffies(750);
 973         do {
 974                 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 975                 if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
 976                         break;
 977                 schedule_timeout_uninterruptible(1);
 978         } while (time_before(jiffies, end_time));
 979
 980         if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)
 981                 dev_err(chip->card->dev,
 982                         "AC'97 codec is not ready [0x%x]\n", val);
 983
 984         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
 985                                  VIA_REG_AC97_SECONDARY_VALID |
 986                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
 987         end_time = jiffies + msecs_to_jiffies(750);
 988         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
 989                                  VIA_REG_AC97_SECONDARY_VALID |
 990                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
 991         do {
 992                 if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) {
 993                         chip->ac97_secondary = 1;
 994                         goto __ac97_ok2;
 995                 }
 996                 schedule_timeout_uninterruptible(1);
 997         } while (time_before(jiffies, end_time));
 998         /* This is ok, the most of motherboards have only one codec */
 999
1000       __ac97_ok2:
1001
1002         /* route FM trap to IRQ, disable FM trap */
1003         // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
1004         /* disable all GPI interrupts */
1005         outl(0, VIAREG(chip, GPI_INTR));
1006
1007         return 0;
1008 }
1009
1010 #ifdef CONFIG_PM_SLEEP
1011 /*
1012  * power management
1013  */
1014 static int snd_via82xx_suspend(struct device *dev)
1015 {
1016         struct snd_card *card = dev_get_drvdata(dev);
1017         struct via82xx_modem *chip = card->private_data;
1018         int i;
1019
1020         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1021         for (i = 0; i < chip->num_devs; i++)
1022                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1023         synchronize_irq(chip->irq);
1024         snd_ac97_suspend(chip->ac97);
1025         return 0;
1026 }
1027
1028 static int snd_via82xx_resume(struct device *dev)
1029 {
1030         struct snd_card *card = dev_get_drvdata(dev);
1031         struct via82xx_modem *chip = card->private_data;
1032         int i;
1033
1034         snd_via82xx_chip_init(chip);
1035
1036         snd_ac97_resume(chip->ac97);
1037
1038         for (i = 0; i < chip->num_devs; i++)
1039                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1040
1041         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1042         return 0;
1043 }
1044
1045 static SIMPLE_DEV_PM_OPS(snd_via82xx_pm, snd_via82xx_suspend, snd_via82xx_resume);
1046 #define SND_VIA82XX_PM_OPS      &snd_via82xx_pm
1047 #else
1048 #define SND_VIA82XX_PM_OPS      NULL
1049 #endif /* CONFIG_PM_SLEEP */
1050
1051 static int snd_via82xx_free(struct via82xx_modem *chip)
1052 {
1053         unsigned int i;
1054
1055         if (chip->irq < 0)
1056                 goto __end_hw;
1057         /* disable interrupts */
1058         for (i = 0; i < chip->num_devs; i++)
1059                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1060
1061       __end_hw:
1062         if (chip->irq >= 0)
1063                 free_irq(chip->irq, chip);
1064         pci_release_regions(chip->pci);
1065         pci_disable_device(chip->pci);
1066         kfree(chip);
1067         return 0;
1068 }
1069
1070 static int snd_via82xx_dev_free(struct snd_device *device)
1071 {
1072         struct via82xx_modem *chip = device->device_data;
1073         return snd_via82xx_free(chip);
1074 }
1075
1076 static int snd_via82xx_create(struct snd_card *card,
1077                               struct pci_dev *pci,
1078                               int chip_type,
1079                               int revision,
1080                               unsigned int ac97_clock,
1081                               struct via82xx_modem **r_via)
1082 {
1083         struct via82xx_modem *chip;
1084         int err;
1085         static struct snd_device_ops ops = {
1086                 .dev_free =     snd_via82xx_dev_free,
1087         };
1088
1089         if ((err = pci_enable_device(pci)) < 0)
1090                 return err;
1091
1092         if ((chip = kzalloc(sizeof(*chip), GFP_KERNEL)) == NULL) {
1093                 pci_disable_device(pci);
1094                 return -ENOMEM;
1095         }
1096
1097         spin_lock_init(&chip->reg_lock);
1098         chip->card = card;
1099         chip->pci = pci;
1100         chip->irq = -1;
1101
1102         if ((err = pci_request_regions(pci, card->driver)) < 0) {
1103                 kfree(chip);
1104                 pci_disable_device(pci);
1105                 return err;
1106         }
1107         chip->port = pci_resource_start(pci, 0);
1108         if (request_irq(pci->irq, snd_via82xx_interrupt, IRQF_SHARED,
1109                         KBUILD_MODNAME, chip)) {
1110                 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
1111                 snd_via82xx_free(chip);
1112                 return -EBUSY;
1113         }
1114         chip->irq = pci->irq;
1115         if (ac97_clock >= 8000 && ac97_clock <= 48000)
1116                 chip->ac97_clock = ac97_clock;
1117         synchronize_irq(chip->irq);
1118
1119         if ((err = snd_via82xx_chip_init(chip)) < 0) {
1120                 snd_via82xx_free(chip);
1121                 return err;
1122         }
1123
1124         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1125                 snd_via82xx_free(chip);
1126                 return err;
1127         }
1128
1129         /* The 8233 ac97 controller does not implement the master bit
1130          * in the pci command register. IMHO this is a violation of the PCI spec.
1131          * We call pci_set_master here because it does not hurt. */
1132         pci_set_master(pci);
1133
1134         *r_via = chip;
1135         return 0;
1136 }
1137
1138
1139 static int snd_via82xx_probe(struct pci_dev *pci,
1140                              const struct pci_device_id *pci_id)
1141 {
1142         struct snd_card *card;
1143         struct via82xx_modem *chip;
1144         int chip_type = 0, card_type;
1145         unsigned int i;
1146         int err;
1147
1148         err = snd_card_new(&pci->dev, index, id, THIS_MODULE, 0, &card);
1149         if (err < 0)
1150                 return err;
1151
1152         card_type = pci_id->driver_data;
1153         switch (card_type) {
1154         case TYPE_CARD_VIA82XX_MODEM:
1155                 strcpy(card->driver, "VIA82XX-MODEM");
1156                 sprintf(card->shortname, "VIA 82XX modem");
1157                 break;
1158         default:
1159                 dev_err(card->dev, "invalid card type %d\n", card_type);
1160                 err = -EINVAL;
1161                 goto __error;
1162         }
1163
1164         if ((err = snd_via82xx_create(card, pci, chip_type, pci->revision,
1165                                       ac97_clock, &chip)) < 0)
1166                 goto __error;
1167         card->private_data = chip;
1168         if ((err = snd_via82xx_mixer_new(chip)) < 0)
1169                 goto __error;
1170
1171         if ((err = snd_via686_pcm_new(chip)) < 0 )
1172                 goto __error;
1173
1174         /* disable interrupts */
1175         for (i = 0; i < chip->num_devs; i++)
1176                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1177
1178         sprintf(card->longname, "%s at 0x%lx, irq %d",
1179                 card->shortname, chip->port, chip->irq);
1180
1181         snd_via82xx_proc_init(chip);
1182
1183         if ((err = snd_card_register(card)) < 0) {
1184                 snd_card_free(card);
1185                 return err;
1186         }
1187         pci_set_drvdata(pci, card);
1188         return 0;
1189
1190  __error:
1191         snd_card_free(card);
1192         return err;
1193 }
1194
1195 static void snd_via82xx_remove(struct pci_dev *pci)
1196 {
1197         snd_card_free(pci_get_drvdata(pci));
1198 }
1199
1200 static struct pci_driver via82xx_modem_driver = {
1201         .name = KBUILD_MODNAME,
1202         .id_table = snd_via82xx_modem_ids,
1203         .probe = snd_via82xx_probe,
1204         .remove = snd_via82xx_remove,
1205         .driver = {
1206                 .pm = SND_VIA82XX_PM_OPS,
1207         },
1208 };
1209
1210 module_pci_driver(via82xx_modem_driver);