sound/pci/via82xx_modem.c

   1 /*
   2  *   ALSA modem driver for VIA VT82xx (South Bridge)
   3  *
   4  *   VT82C686A/B/C, VT8233A/C, VT8235
   5  *
   6  *      Copyright (c) 2000 Jaroslav Kysela <perex@suse.cz>
   7  *                         Tjeerd.Mulder <Tjeerd.Mulder@fujitsu-siemens.com>
   8  *                    2002 Takashi Iwai <tiwai@suse.de>
   9  *
  10  *   This program is free software; you can redistribute it and/or modify
  11  *   it under the terms of the GNU General Public License as published by
  12  *   the Free Software Foundation; either version 2 of the License, or
  13  *   (at your option) any later version.
  14  *
  15  *   This program is distributed in the hope that it will be useful,
  16  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *   GNU General Public License for more details.
  19  *
  20  *   You should have received a copy of the GNU General Public License
  21  *   along with this program; if not, write to the Free Software
  22  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  23  *
  24  */
  25
  26 /*
  27  * Changes:
  28  *
  29  * Sep. 2,  2004  Sasha Khapyorsky <sashak@smlink.com>
  30  *      Modified from original audio driver 'via82xx.c' to support AC97
  31  *      modems.
  32  */
  33
  34 #include <sound/driver.h>
  35 #include <asm/io.h>
  36 #include <linux/delay.h>
  37 #include <linux/interrupt.h>
  38 #include <linux/init.h>
  39 #include <linux/pci.h>
  40 #include <linux/slab.h>
  41 #include <linux/moduleparam.h>
  42 #include <sound/core.h>
  43 #include <sound/pcm.h>
  44 #include <sound/pcm_params.h>
  45 #include <sound/info.h>
  46 #include <sound/ac97_codec.h>
  47 #include <sound/initval.h>
  48
  49 #if 0
  50 #define POINTER_DEBUG
  51 #endif
  52
  53 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>");
  54 MODULE_DESCRIPTION("VIA VT82xx modem");
  55 MODULE_LICENSE("GPL");
  56 MODULE_SUPPORTED_DEVICE("{{VIA,VT82C686A/B/C modem,pci}}");
  57
  58 static int index[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = -2}; /* Exclude the first card */
  59 static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;       /* ID for this card */
  60 static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;      /* Enable this card */
  61 static int ac97_clock[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS - 1)] = 48000};
  62
  63 module_param_array(index, int, NULL, 0444);
  64 MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge.");
  65 module_param_array(id, charp, NULL, 0444);
  66 MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge.");
  67 module_param_array(enable, bool, NULL, 0444);
  68 MODULE_PARM_DESC(enable, "Enable modem part of VIA 82xx bridge.");
  69 module_param_array(ac97_clock, int, NULL, 0444);
  70 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
  71
  72
  73 /*
  74  *  Direct registers
  75  */
  76
  77 #define VIAREG(via, x) ((via)->port + VIA_REG_##x)
  78 #define VIADEV_REG(viadev, x) ((viadev)->port + VIA_REG_##x)
  79
  80 /* common offsets */
  81 #define VIA_REG_OFFSET_STATUS           0x00    /* byte - channel status */
  82 #define   VIA_REG_STAT_ACTIVE           0x80    /* RO */
  83 #define   VIA_REG_STAT_PAUSED           0x40    /* RO */
  84 #define   VIA_REG_STAT_TRIGGER_QUEUED   0x08    /* RO */
  85 #define   VIA_REG_STAT_STOPPED          0x04    /* RWC */
  86 #define   VIA_REG_STAT_EOL              0x02    /* RWC */
  87 #define   VIA_REG_STAT_FLAG             0x01    /* RWC */
  88 #define VIA_REG_OFFSET_CONTROL          0x01    /* byte - channel control */
  89 #define   VIA_REG_CTRL_START            0x80    /* WO */
  90 #define   VIA_REG_CTRL_TERMINATE        0x40    /* WO */
  91 #define   VIA_REG_CTRL_AUTOSTART        0x20
  92 #define   VIA_REG_CTRL_PAUSE            0x08    /* RW */
  93 #define   VIA_REG_CTRL_INT_STOP         0x04
  94 #define   VIA_REG_CTRL_INT_EOL          0x02
  95 #define   VIA_REG_CTRL_INT_FLAG         0x01
  96 #define   VIA_REG_CTRL_RESET            0x01    /* RW - probably reset? undocumented */
  97 #define   VIA_REG_CTRL_INT (VIA_REG_CTRL_INT_FLAG | VIA_REG_CTRL_INT_EOL | VIA_REG_CTRL_AUTOSTART)
  98 #define VIA_REG_OFFSET_TYPE             0x02    /* byte - channel type (686 only) */
  99 #define   VIA_REG_TYPE_AUTOSTART        0x80    /* RW - autostart at EOL */
 100 #define   VIA_REG_TYPE_16BIT            0x20    /* RW */
 101 #define   VIA_REG_TYPE_STEREO           0x10    /* RW */
 102 #define   VIA_REG_TYPE_INT_LLINE        0x00
 103 #define   VIA_REG_TYPE_INT_LSAMPLE      0x04
 104 #define   VIA_REG_TYPE_INT_LESSONE      0x08
 105 #define   VIA_REG_TYPE_INT_MASK         0x0c
 106 #define   VIA_REG_TYPE_INT_EOL          0x02
 107 #define   VIA_REG_TYPE_INT_FLAG         0x01
 108 #define VIA_REG_OFFSET_TABLE_PTR        0x04    /* dword - channel table pointer */
 109 #define VIA_REG_OFFSET_CURR_PTR         0x04    /* dword - channel current pointer */
 110 #define VIA_REG_OFFSET_STOP_IDX         0x08    /* dword - stop index, channel type, sample rate */
 111 #define VIA_REG_OFFSET_CURR_COUNT       0x0c    /* dword - channel current count (24 bit) */
 112 #define VIA_REG_OFFSET_CURR_INDEX       0x0f    /* byte - channel current index (for via8233 only) */
 113
 114 #define DEFINE_VIA_REGSET(name,val) \
 115 enum {\
 116         VIA_REG_##name##_STATUS         = (val),\
 117         VIA_REG_##name##_CONTROL        = (val) + 0x01,\
 118         VIA_REG_##name##_TYPE           = (val) + 0x02,\
 119         VIA_REG_##name##_TABLE_PTR      = (val) + 0x04,\
 120         VIA_REG_##name##_CURR_PTR       = (val) + 0x04,\
 121         VIA_REG_##name##_STOP_IDX       = (val) + 0x08,\
 122         VIA_REG_##name##_CURR_COUNT     = (val) + 0x0c,\
 123 }
 124
 125 /* modem block */
 126 DEFINE_VIA_REGSET(MO, 0x40);
 127 DEFINE_VIA_REGSET(MI, 0x50);
 128
 129 /* AC'97 */
 130 #define VIA_REG_AC97                    0x80    /* dword */
 131 #define   VIA_REG_AC97_CODEC_ID_MASK    (3<<30)
 132 #define   VIA_REG_AC97_CODEC_ID_SHIFT   30
 133 #define   VIA_REG_AC97_CODEC_ID_PRIMARY 0x00
 134 #define   VIA_REG_AC97_CODEC_ID_SECONDARY 0x01
 135 #define   VIA_REG_AC97_SECONDARY_VALID  (1<<27)
 136 #define   VIA_REG_AC97_PRIMARY_VALID    (1<<25)
 137 #define   VIA_REG_AC97_BUSY             (1<<24)
 138 #define   VIA_REG_AC97_READ             (1<<23)
 139 #define   VIA_REG_AC97_CMD_SHIFT        16
 140 #define   VIA_REG_AC97_CMD_MASK         0x7e
 141 #define   VIA_REG_AC97_DATA_SHIFT       0
 142 #define   VIA_REG_AC97_DATA_MASK        0xffff
 143
 144 #define VIA_REG_SGD_SHADOW              0x84    /* dword */
 145 #define   VIA_REG_SGD_STAT_PB_FLAG      (1<<0)
 146 #define   VIA_REG_SGD_STAT_CP_FLAG      (1<<1)
 147 #define   VIA_REG_SGD_STAT_FM_FLAG      (1<<2)
 148 #define   VIA_REG_SGD_STAT_PB_EOL       (1<<4)
 149 #define   VIA_REG_SGD_STAT_CP_EOL       (1<<5)
 150 #define   VIA_REG_SGD_STAT_FM_EOL       (1<<6)
 151 #define   VIA_REG_SGD_STAT_PB_STOP      (1<<8)
 152 #define   VIA_REG_SGD_STAT_CP_STOP      (1<<9)
 153 #define   VIA_REG_SGD_STAT_FM_STOP      (1<<10)
 154 #define   VIA_REG_SGD_STAT_PB_ACTIVE    (1<<12)
 155 #define   VIA_REG_SGD_STAT_CP_ACTIVE    (1<<13)
 156 #define   VIA_REG_SGD_STAT_FM_ACTIVE    (1<<14)
 157 #define   VIA_REG_SGD_STAT_MR_FLAG      (1<<16)
 158 #define   VIA_REG_SGD_STAT_MW_FLAG      (1<<17)
 159 #define   VIA_REG_SGD_STAT_MR_EOL       (1<<20)
 160 #define   VIA_REG_SGD_STAT_MW_EOL       (1<<21)
 161 #define   VIA_REG_SGD_STAT_MR_STOP      (1<<24)
 162 #define   VIA_REG_SGD_STAT_MW_STOP      (1<<25)
 163 #define   VIA_REG_SGD_STAT_MR_ACTIVE    (1<<28)
 164 #define   VIA_REG_SGD_STAT_MW_ACTIVE    (1<<29)
 165
 166 #define VIA_REG_GPI_STATUS              0x88
 167 #define VIA_REG_GPI_INTR                0x8c
 168
 169 #define VIA_TBL_BIT_FLAG        0x40000000
 170 #define VIA_TBL_BIT_EOL         0x80000000
 171
 172 /* pci space */
 173 #define VIA_ACLINK_STAT         0x40
 174 #define  VIA_ACLINK_C11_READY   0x20
 175 #define  VIA_ACLINK_C10_READY   0x10
 176 #define  VIA_ACLINK_C01_READY   0x04 /* secondary codec ready */
 177 #define  VIA_ACLINK_LOWPOWER    0x02 /* low-power state */
 178 #define  VIA_ACLINK_C00_READY   0x01 /* primary codec ready */
 179 #define VIA_ACLINK_CTRL         0x41
 180 #define  VIA_ACLINK_CTRL_ENABLE 0x80 /* 0: disable, 1: enable */
 181 #define  VIA_ACLINK_CTRL_RESET  0x40 /* 0: assert, 1: de-assert */
 182 #define  VIA_ACLINK_CTRL_SYNC   0x20 /* 0: release SYNC, 1: force SYNC hi */
 183 #define  VIA_ACLINK_CTRL_SDO    0x10 /* 0: release SDO, 1: force SDO hi */
 184 #define  VIA_ACLINK_CTRL_VRA    0x08 /* 0: disable VRA, 1: enable VRA */
 185 #define  VIA_ACLINK_CTRL_PCM    0x04 /* 0: disable PCM, 1: enable PCM */
 186 #define  VIA_ACLINK_CTRL_FM     0x02 /* via686 only */
 187 #define  VIA_ACLINK_CTRL_SB     0x01 /* via686 only */
 188 #define  VIA_ACLINK_CTRL_INIT   (VIA_ACLINK_CTRL_ENABLE|\
 189                                  VIA_ACLINK_CTRL_RESET|\
 190                                  VIA_ACLINK_CTRL_PCM)
 191 #define VIA_FUNC_ENABLE         0x42
 192 #define  VIA_FUNC_MIDI_PNP      0x80 /* FIXME: it's 0x40 in the datasheet! */
 193 #define  VIA_FUNC_MIDI_IRQMASK  0x40 /* FIXME: not documented! */
 194 #define  VIA_FUNC_RX2C_WRITE    0x20
 195 #define  VIA_FUNC_SB_FIFO_EMPTY 0x10
 196 #define  VIA_FUNC_ENABLE_GAME   0x08
 197 #define  VIA_FUNC_ENABLE_FM     0x04
 198 #define  VIA_FUNC_ENABLE_MIDI   0x02
 199 #define  VIA_FUNC_ENABLE_SB     0x01
 200 #define VIA_PNP_CONTROL         0x43
 201 #define VIA_MC97_CTRL           0x44
 202 #define  VIA_MC97_CTRL_ENABLE   0x80
 203 #define  VIA_MC97_CTRL_SECONDARY 0x40
 204 #define  VIA_MC97_CTRL_INIT     (VIA_MC97_CTRL_ENABLE|\
 205                                  VIA_MC97_CTRL_SECONDARY)
 206
 207
 208 typedef struct _snd_via82xx_modem via82xx_t;
 209 typedef struct via_dev viadev_t;
 210
 211 /*
 212  * pcm stream
 213  */
 214
 215 struct snd_via_sg_table {
 216         unsigned int offset;
 217         unsigned int size;
 218 } ;
 219
 220 #define VIA_TABLE_SIZE  255
 221
 222 struct via_dev {
 223         unsigned int reg_offset;
 224         unsigned long port;
 225         int direction;  /* playback = 0, capture = 1 */
 226         snd_pcm_substream_t *substream;
 227         int running;
 228         unsigned int tbl_entries; /* # descriptors */
 229         struct snd_dma_buffer table;
 230         struct snd_via_sg_table *idx_table;
 231         /* for recovery from the unexpected pointer */
 232         unsigned int lastpos;
 233         unsigned int bufsize;
 234         unsigned int bufsize2;
 235 };
 236
 237 enum { TYPE_CARD_VIA82XX_MODEM = 1 };
 238
 239 #define VIA_MAX_MODEM_DEVS      2
 240
 241 struct _snd_via82xx_modem {
 242         int irq;
 243
 244         unsigned long port;
 245
 246         unsigned int intr_mask; /* SGD_SHADOW mask to check interrupts */
 247
 248         struct pci_dev *pci;
 249         snd_card_t *card;
 250
 251         unsigned int num_devs;
 252         unsigned int playback_devno, capture_devno;
 253         viadev_t devs[VIA_MAX_MODEM_DEVS];
 254
 255         snd_pcm_t *pcms[2];
 256
 257         ac97_bus_t *ac97_bus;
 258         ac97_t *ac97;
 259         unsigned int ac97_clock;
 260         unsigned int ac97_secondary;    /* secondary AC'97 codec is present */
 261
 262         spinlock_t reg_lock;
 263         snd_info_entry_t *proc_entry;
 264 };
 265
 266 static struct pci_device_id snd_via82xx_modem_ids[] = {
 267         { 0x1106, 0x3068, PCI_ANY_ID, PCI_ANY_ID, 0, 0, TYPE_CARD_VIA82XX_MODEM, },
 268         { 0, }
 269 };
 270
 271 MODULE_DEVICE_TABLE(pci, snd_via82xx_modem_ids);
 272
 273 /*
 274  */
 275
 276 /*
 277  * allocate and initialize the descriptor buffers
 278  * periods = number of periods
 279  * fragsize = period size in bytes
 280  */
 281 static int build_via_table(viadev_t *dev, snd_pcm_substream_t *substream,
 282                            struct pci_dev *pci,
 283                            unsigned int periods, unsigned int fragsize)
 284 {
 285         unsigned int i, idx, ofs, rest;
 286         via82xx_t *chip = snd_pcm_substream_chip(substream);
 287         struct snd_sg_buf *sgbuf = snd_pcm_substream_sgbuf(substream);
 288
 289         if (dev->table.area == NULL) {
 290                 /* the start of each lists must be aligned to 8 bytes,
 291                  * but the kernel pages are much bigger, so we don't care
 292                  */
 293                 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
 294                                         PAGE_ALIGN(VIA_TABLE_SIZE * 2 * 8),
 295                                         &dev->table) < 0)
 296                         return -ENOMEM;
 297         }
 298         if (! dev->idx_table) {
 299                 dev->idx_table = kmalloc(sizeof(*dev->idx_table) * VIA_TABLE_SIZE, GFP_KERNEL);
 300                 if (! dev->idx_table)
 301                         return -ENOMEM;
 302         }
 303
 304         /* fill the entries */
 305         idx = 0;
 306         ofs = 0;
 307         for (i = 0; i < periods; i++) {
 308                 rest = fragsize;
 309                 /* fill descriptors for a period.
 310                  * a period can be split to several descriptors if it's
 311                  * over page boundary.
 312                  */
 313                 do {
 314                         unsigned int r;
 315                         unsigned int flag;
 316
 317                         if (idx >= VIA_TABLE_SIZE) {
 318                                 snd_printk(KERN_ERR "via82xx: too much table size!\n");
 319                                 return -EINVAL;
 320                         }
 321                         ((u32 *)dev->table.area)[idx << 1] = cpu_to_le32((u32)snd_pcm_sgbuf_get_addr(sgbuf, ofs));
 322                         r = PAGE_SIZE - (ofs % PAGE_SIZE);
 323                         if (rest < r)
 324                                 r = rest;
 325                         rest -= r;
 326                         if (! rest) {
 327                                 if (i == periods - 1)
 328                                         flag = VIA_TBL_BIT_EOL; /* buffer boundary */
 329                                 else
 330                                         flag = VIA_TBL_BIT_FLAG; /* period boundary */
 331                         } else
 332                                 flag = 0; /* period continues to the next */
 333                         // printk("via: tbl %d: at %d  size %d (rest %d)\n", idx, ofs, r, rest);
 334                         ((u32 *)dev->table.area)[(idx<<1) + 1] = cpu_to_le32(r | flag);
 335                         dev->idx_table[idx].offset = ofs;
 336                         dev->idx_table[idx].size = r;
 337                         ofs += r;
 338                         idx++;
 339                 } while (rest > 0);
 340         }
 341         dev->tbl_entries = idx;
 342         dev->bufsize = periods * fragsize;
 343         dev->bufsize2 = dev->bufsize / 2;
 344         return 0;
 345 }
 346
 347
 348 static int clean_via_table(viadev_t *dev, snd_pcm_substream_t *substream,
 349                            struct pci_dev *pci)
 350 {
 351         if (dev->table.area) {
 352                 snd_dma_free_pages(&dev->table);
 353                 dev->table.area = NULL;
 354         }
 355         if (dev->idx_table) {
 356                 kfree(dev->idx_table);
 357                 dev->idx_table = NULL;
 358         }
 359         return 0;
 360 }
 361
 362 /*
 363  *  Basic I/O
 364  */
 365
 366 static inline unsigned int snd_via82xx_codec_xread(via82xx_t *chip)
 367 {
 368         return inl(VIAREG(chip, AC97));
 369 }
 370
 371 static inline void snd_via82xx_codec_xwrite(via82xx_t *chip, unsigned int val)
 372 {
 373         outl(val, VIAREG(chip, AC97));
 374 }
 375
 376 static int snd_via82xx_codec_ready(via82xx_t *chip, int secondary)
 377 {
 378         unsigned int timeout = 1000;    /* 1ms */
 379         unsigned int val;
 380
 381         while (timeout-- > 0) {
 382                 udelay(1);
 383                 if (!((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY))
 384                         return val & 0xffff;
 385         }
 386         snd_printk(KERN_ERR "codec_ready: codec %i is not ready [0x%x]\n", secondary, snd_via82xx_codec_xread(chip));
 387         return -EIO;
 388 }
 389
 390 static int snd_via82xx_codec_valid(via82xx_t *chip, int secondary)
 391 {
 392         unsigned int timeout = 1000;    /* 1ms */
 393         unsigned int val, val1;
 394         unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID :
 395                                          VIA_REG_AC97_SECONDARY_VALID;
 396
 397         while (timeout-- > 0) {
 398                 val = snd_via82xx_codec_xread(chip);
 399                 val1 = val & (VIA_REG_AC97_BUSY | stat);
 400                 if (val1 == stat)
 401                         return val & 0xffff;
 402                 udelay(1);
 403         }
 404         return -EIO;
 405 }
 406
 407 static void snd_via82xx_codec_wait(ac97_t *ac97)
 408 {
 409         via82xx_t *chip = ac97->private_data;
 410         int err;
 411         err = snd_via82xx_codec_ready(chip, ac97->num);
 412         /* here we need to wait fairly for long time.. */
 413         set_current_state(TASK_UNINTERRUPTIBLE);
 414         schedule_timeout(HZ/2);
 415 }
 416
 417 static void snd_via82xx_codec_write(ac97_t *ac97,
 418                                     unsigned short reg,
 419                                     unsigned short val)
 420 {
 421         via82xx_t *chip = ac97->private_data;
 422         unsigned int xval;
 423         if(reg == AC97_GPIO_STATUS) {
 424                 outl(val, VIAREG(chip, GPI_STATUS));
 425                 return;
 426         }
 427         xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY;
 428         xval <<= VIA_REG_AC97_CODEC_ID_SHIFT;
 429         xval |= reg << VIA_REG_AC97_CMD_SHIFT;
 430         xval |= val << VIA_REG_AC97_DATA_SHIFT;
 431         snd_via82xx_codec_xwrite(chip, xval);
 432         snd_via82xx_codec_ready(chip, ac97->num);
 433 }
 434
 435 static unsigned short snd_via82xx_codec_read(ac97_t *ac97, unsigned short reg)
 436 {
 437         via82xx_t *chip = ac97->private_data;
 438         unsigned int xval, val = 0xffff;
 439         int again = 0;
 440
 441         xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT;
 442         xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID;
 443         xval |= VIA_REG_AC97_READ;
 444         xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT;
 445         while (1) {
 446                 if (again++ > 3) {
 447                         snd_printk(KERN_ERR "codec_read: codec %i is not valid [0x%x]\n", ac97->num, snd_via82xx_codec_xread(chip));
 448                         return 0xffff;
 449                 }
 450                 snd_via82xx_codec_xwrite(chip, xval);
 451                 udelay (20);
 452                 if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) {
 453                         udelay(25);
 454                         val = snd_via82xx_codec_xread(chip);
 455                         break;
 456                 }
 457         }
 458         return val & 0xffff;
 459 }
 460
 461 static void snd_via82xx_channel_reset(via82xx_t *chip, viadev_t *viadev)
 462 {
 463         outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET,
 464              VIADEV_REG(viadev, OFFSET_CONTROL));
 465         inb(VIADEV_REG(viadev, OFFSET_CONTROL));
 466         udelay(50);
 467         /* disable interrupts */
 468         outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL));
 469         /* clear interrupts */
 470         outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS));
 471         outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */
 472         // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR));
 473         viadev->lastpos = 0;
 474 }
 475
 476
 477 /*
 478  *  Interrupt handler
 479  */
 480
 481 static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id, struct pt_regs *regs)
 482 {
 483         via82xx_t *chip = dev_id;
 484         unsigned int status;
 485         unsigned int i;
 486
 487         status = inl(VIAREG(chip, SGD_SHADOW));
 488         if (! (status & chip->intr_mask)) {
 489                 return IRQ_NONE;
 490         }
 491 // _skip_sgd:
 492
 493         /* check status for each stream */
 494         spin_lock(&chip->reg_lock);
 495         for (i = 0; i < chip->num_devs; i++) {
 496                 viadev_t *viadev = &chip->devs[i];
 497                 unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS));
 498                 c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED);
 499                 if (! c_status)
 500                         continue;
 501                 if (viadev->substream && viadev->running) {
 502                         spin_unlock(&chip->reg_lock);
 503                         snd_pcm_period_elapsed(viadev->substream);
 504                         spin_lock(&chip->reg_lock);
 505                 }
 506                 outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */
 507         }
 508         spin_unlock(&chip->reg_lock);
 509         return IRQ_HANDLED;
 510 }
 511
 512 /*
 513  *  PCM callbacks
 514  */
 515
 516 /*
 517  * trigger callback
 518  */
 519 static int snd_via82xx_pcm_trigger(snd_pcm_substream_t * substream, int cmd)
 520 {
 521         via82xx_t *chip = snd_pcm_substream_chip(substream);
 522         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 523         unsigned char val = 0;
 524
 525         switch (cmd) {
 526         case SNDRV_PCM_TRIGGER_START:
 527                 val |= VIA_REG_CTRL_START;
 528                 viadev->running = 1;
 529                 break;
 530         case SNDRV_PCM_TRIGGER_STOP:
 531                 val = VIA_REG_CTRL_TERMINATE;
 532                 viadev->running = 0;
 533                 break;
 534         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 535                 val |= VIA_REG_CTRL_PAUSE;
 536                 viadev->running = 0;
 537                 break;
 538         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 539                 viadev->running = 1;
 540                 break;
 541         default:
 542                 return -EINVAL;
 543         }
 544         outb(val, VIADEV_REG(viadev, OFFSET_CONTROL));
 545         if (cmd == SNDRV_PCM_TRIGGER_STOP)
 546                 snd_via82xx_channel_reset(chip, viadev);
 547         return 0;
 548 }
 549
 550 /*
 551  * pointer callbacks
 552  */
 553
 554 /*
 555  * calculate the linear position at the given sg-buffer index and the rest count
 556  */
 557
 558 #define check_invalid_pos(viadev,pos) \
 559         ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 || viadev->lastpos < viadev->bufsize2))
 560
 561 static inline unsigned int calc_linear_pos(viadev_t *viadev, unsigned int idx, unsigned int count)
 562 {
 563         unsigned int size, res;
 564
 565         size = viadev->idx_table[idx].size;
 566         res = viadev->idx_table[idx].offset + size - count;
 567
 568         /* check the validity of the calculated position */
 569         if (size < count) {
 570                 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (size = %d, count = %d)\n", (int)size, (int)count);
 571                 res = viadev->lastpos;
 572         } else if (check_invalid_pos(viadev, res)) {
 573 #ifdef POINTER_DEBUG
 574                 printk("fail: idx = %i/%i, lastpos = 0x%x, bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, count = 0x%x\n", idx, viadev->tbl_entries, viadev->lastpos, viadev->bufsize2, viadev->idx_table[idx].offset, viadev->idx_table[idx].size, count);
 575 #endif
 576                 if (count && size < count) {
 577                         snd_printd(KERN_ERR "invalid via82xx_cur_ptr, using last valid pointer\n");
 578                         res = viadev->lastpos;
 579                 } else {
 580                         if (! count)
 581                                 /* bogus count 0 on the DMA boundary? */
 582                                 res = viadev->idx_table[idx].offset;
 583                         else
 584                                 /* count register returns full size when end of buffer is reached */
 585                                 res = viadev->idx_table[idx].offset + size;
 586                         if (check_invalid_pos(viadev, res)) {
 587                                 snd_printd(KERN_ERR "invalid via82xx_cur_ptr (2), using last valid pointer\n");
 588                                 res = viadev->lastpos;
 589                         }
 590                 }
 591         }
 592         viadev->lastpos = res; /* remember the last position */
 593         if (res >= viadev->bufsize)
 594                 res -= viadev->bufsize;
 595         return res;
 596 }
 597
 598 /*
 599  * get the current pointer on via686
 600  */
 601 static snd_pcm_uframes_t snd_via686_pcm_pointer(snd_pcm_substream_t *substream)
 602 {
 603         via82xx_t *chip = snd_pcm_substream_chip(substream);
 604         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 605         unsigned int idx, ptr, count, res;
 606
 607         snd_assert(viadev->tbl_entries, return 0);
 608         if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE))
 609                 return 0;
 610
 611         spin_lock(&chip->reg_lock);
 612         count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff;
 613         /* The via686a does not have the current index register,
 614          * so we need to calculate the index from CURR_PTR.
 615          */
 616         ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR));
 617         if (ptr <= (unsigned int)viadev->table.addr)
 618                 idx = 0;
 619         else /* CURR_PTR holds the address + 8 */
 620                 idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) % viadev->tbl_entries;
 621         res = calc_linear_pos(viadev, idx, count);
 622         spin_unlock(&chip->reg_lock);
 623
 624         return bytes_to_frames(substream->runtime, res);
 625 }
 626
 627 /*
 628  * hw_params callback:
 629  * allocate the buffer and build up the buffer description table
 630  */
 631 static int snd_via82xx_hw_params(snd_pcm_substream_t * substream,
 632                                  snd_pcm_hw_params_t * hw_params)
 633 {
 634         via82xx_t *chip = snd_pcm_substream_chip(substream);
 635         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 636         int err;
 637
 638         err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 639         if (err < 0)
 640                 return err;
 641         err = build_via_table(viadev, substream, chip->pci,
 642                               params_periods(hw_params),
 643                               params_period_bytes(hw_params));
 644         if (err < 0)
 645                 return err;
 646
 647         snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params));
 648         snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0);
 649
 650         return 0;
 651 }
 652
 653 /*
 654  * hw_free callback:
 655  * clean up the buffer description table and release the buffer
 656  */
 657 static int snd_via82xx_hw_free(snd_pcm_substream_t * substream)
 658 {
 659         via82xx_t *chip = snd_pcm_substream_chip(substream);
 660         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 661
 662         clean_via_table(viadev, substream, chip->pci);
 663         snd_pcm_lib_free_pages(substream);
 664         return 0;
 665 }
 666
 667
 668 /*
 669  * set up the table pointer
 670  */
 671 static void snd_via82xx_set_table_ptr(via82xx_t *chip, viadev_t *viadev)
 672 {
 673         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 674         outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR));
 675         udelay(20);
 676         snd_via82xx_codec_ready(chip, chip->ac97_secondary);
 677 }
 678
 679 /*
 680  * prepare callback for playback and capture
 681  */
 682 static int snd_via82xx_pcm_prepare(snd_pcm_substream_t *substream)
 683 {
 684         via82xx_t *chip = snd_pcm_substream_chip(substream);
 685         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 686
 687         snd_via82xx_channel_reset(chip, viadev);
 688         /* this must be set after channel_reset */
 689         snd_via82xx_set_table_ptr(chip, viadev);
 690         outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG,
 691              VIADEV_REG(viadev, OFFSET_TYPE));
 692         return 0;
 693 }
 694
 695 /*
 696  * pcm hardware definition, identical for both playback and capture
 697  */
 698 static snd_pcm_hardware_t snd_via82xx_hw =
 699 {
 700         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 701                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 702                                  SNDRV_PCM_INFO_MMAP_VALID |
 703                                  SNDRV_PCM_INFO_RESUME |
 704                                  SNDRV_PCM_INFO_PAUSE),
 705         .formats =              SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE,
 706         .rates =                SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT,
 707         .rate_min =             8000,
 708         .rate_max =             16000,
 709         .channels_min =         1,
 710         .channels_max =         1,
 711         .buffer_bytes_max =     128 * 1024,
 712         .period_bytes_min =     32,
 713         .period_bytes_max =     128 * 1024,
 714         .periods_min =          2,
 715         .periods_max =          VIA_TABLE_SIZE / 2,
 716         .fifo_size =            0,
 717 };
 718
 719
 720 /*
 721  * open callback skeleton
 722  */
 723 static int snd_via82xx_modem_pcm_open(via82xx_t *chip, viadev_t *viadev, snd_pcm_substream_t * substream)
 724 {
 725         snd_pcm_runtime_t *runtime = substream->runtime;
 726         int err;
 727         static unsigned int rates[] = { 8000,  9600, 12000, 16000 };
 728         static snd_pcm_hw_constraint_list_t hw_constraints_rates = {
 729                 .count = ARRAY_SIZE(rates),
 730                 .list = rates,
 731                 .mask = 0,
 732         };
 733
 734         runtime->hw = snd_via82xx_hw;
 735
 736         if ((err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, &hw_constraints_rates)) < 0)
 737                 return err;
 738
 739         /* we may remove following constaint when we modify table entries
 740            in interrupt */
 741         if ((err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 742                 return err;
 743
 744         runtime->private_data = viadev;
 745         viadev->substream = substream;
 746
 747         return 0;
 748 }
 749
 750
 751 /*
 752  * open callback for playback
 753  */
 754 static int snd_via82xx_playback_open(snd_pcm_substream_t * substream)
 755 {
 756         via82xx_t *chip = snd_pcm_substream_chip(substream);
 757         viadev_t *viadev = &chip->devs[chip->playback_devno + substream->number];
 758
 759         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 760 }
 761
 762 /*
 763  * open callback for capture
 764  */
 765 static int snd_via82xx_capture_open(snd_pcm_substream_t * substream)
 766 {
 767         via82xx_t *chip = snd_pcm_substream_chip(substream);
 768         viadev_t *viadev = &chip->devs[chip->capture_devno + substream->pcm->device];
 769
 770         return snd_via82xx_modem_pcm_open(chip, viadev, substream);
 771 }
 772
 773 /*
 774  * close callback
 775  */
 776 static int snd_via82xx_pcm_close(snd_pcm_substream_t * substream)
 777 {
 778         viadev_t *viadev = (viadev_t *)substream->runtime->private_data;
 779
 780         viadev->substream = NULL;
 781         return 0;
 782 }
 783
 784
 785 /* via686 playback callbacks */
 786 static snd_pcm_ops_t snd_via686_playback_ops = {
 787         .open =         snd_via82xx_playback_open,
 788         .close =        snd_via82xx_pcm_close,
 789         .ioctl =        snd_pcm_lib_ioctl,
 790         .hw_params =    snd_via82xx_hw_params,
 791         .hw_free =      snd_via82xx_hw_free,
 792         .prepare =      snd_via82xx_pcm_prepare,
 793         .trigger =      snd_via82xx_pcm_trigger,
 794         .pointer =      snd_via686_pcm_pointer,
 795         .page =         snd_pcm_sgbuf_ops_page,
 796 };
 797
 798 /* via686 capture callbacks */
 799 static snd_pcm_ops_t snd_via686_capture_ops = {
 800         .open =         snd_via82xx_capture_open,
 801         .close =        snd_via82xx_pcm_close,
 802         .ioctl =        snd_pcm_lib_ioctl,
 803         .hw_params =    snd_via82xx_hw_params,
 804         .hw_free =      snd_via82xx_hw_free,
 805         .prepare =      snd_via82xx_pcm_prepare,
 806         .trigger =      snd_via82xx_pcm_trigger,
 807         .pointer =      snd_via686_pcm_pointer,
 808         .page =         snd_pcm_sgbuf_ops_page,
 809 };
 810
 811
 812 static void init_viadev(via82xx_t *chip, int idx, unsigned int reg_offset, int direction)
 813 {
 814         chip->devs[idx].reg_offset = reg_offset;
 815         chip->devs[idx].direction = direction;
 816         chip->devs[idx].port = chip->port + reg_offset;
 817 }
 818
 819 /*
 820  * create a pcm instance for via686a/b
 821  */
 822 static int __devinit snd_via686_pcm_new(via82xx_t *chip)
 823 {
 824         snd_pcm_t *pcm;
 825         int err;
 826
 827         chip->playback_devno = 0;
 828         chip->capture_devno = 1;
 829         chip->num_devs = 2;
 830         chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */
 831
 832         err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm);
 833         if (err < 0)
 834                 return err;
 835         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops);
 836         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops);
 837         pcm->private_data = chip;
 838         strcpy(pcm->name, chip->card->shortname);
 839         chip->pcms[0] = pcm;
 840         init_viadev(chip, 0, VIA_REG_MO_STATUS, 0);
 841         init_viadev(chip, 1, VIA_REG_MI_STATUS, 1);
 842
 843         if ((err = snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV_SG,
 844                                                          snd_dma_pci_data(chip->pci), 64*1024, 128*1024)) < 0)
 845                 return err;
 846
 847         return 0;
 848 }
 849
 850
 851 /*
 852  *  Mixer part
 853  */
 854
 855
 856 static void snd_via82xx_mixer_free_ac97_bus(ac97_bus_t *bus)
 857 {
 858         via82xx_t *chip = bus->private_data;
 859         chip->ac97_bus = NULL;
 860 }
 861
 862 static void snd_via82xx_mixer_free_ac97(ac97_t *ac97)
 863 {
 864         via82xx_t *chip = ac97->private_data;
 865         chip->ac97 = NULL;
 866 }
 867
 868
 869 static int __devinit snd_via82xx_mixer_new(via82xx_t *chip)
 870 {
 871         ac97_template_t ac97;
 872         int err;
 873         static ac97_bus_ops_t ops = {
 874                 .write = snd_via82xx_codec_write,
 875                 .read = snd_via82xx_codec_read,
 876                 .wait = snd_via82xx_codec_wait,
 877         };
 878
 879         if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus)) < 0)
 880                 return err;
 881         chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus;
 882         chip->ac97_bus->clock = chip->ac97_clock;
 883         chip->ac97_bus->shared_type = AC97_SHARED_TYPE_VIA;
 884
 885         memset(&ac97, 0, sizeof(ac97));
 886         ac97.private_data = chip;
 887         ac97.private_free = snd_via82xx_mixer_free_ac97;
 888         ac97.pci = chip->pci;
 889         ac97.scaps = AC97_SCAP_SKIP_AUDIO;
 890         ac97.num = chip->ac97_secondary;
 891
 892         if ((err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97)) < 0)
 893                 return err;
 894
 895         return 0;
 896 }
 897
 898
 899 /*
 900  * proc interface
 901  */
 902 static void snd_via82xx_proc_read(snd_info_entry_t *entry, snd_info_buffer_t *buffer)
 903 {
 904         via82xx_t *chip = entry->private_data;
 905         int i;
 906
 907         snd_iprintf(buffer, "%s\n\n", chip->card->longname);
 908         for (i = 0; i < 0xa0; i += 4) {
 909                 snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i));
 910         }
 911 }
 912
 913 static void __devinit snd_via82xx_proc_init(via82xx_t *chip)
 914 {
 915         snd_info_entry_t *entry;
 916
 917         if (! snd_card_proc_new(chip->card, "via82xx", &entry))
 918                 snd_info_set_text_ops(entry, chip, 1024, snd_via82xx_proc_read);
 919 }
 920
 921 /*
 922  *
 923  */
 924
 925 static int snd_via82xx_chip_init(via82xx_t *chip)
 926 {
 927         unsigned int val;
 928         int max_count;
 929         unsigned char pval;
 930
 931         pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval);
 932         if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) {
 933                 pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT);
 934                 udelay(100);
 935         }
 936
 937         pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 938         if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */
 939                 /* deassert ACLink reset, force SYNC */
 940                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 941                                       VIA_ACLINK_CTRL_ENABLE |
 942                                       VIA_ACLINK_CTRL_RESET |
 943                                       VIA_ACLINK_CTRL_SYNC);
 944                 udelay(100);
 945 #if 1 /* FIXME: should we do full reset here for all chip models? */
 946                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00);
 947                 udelay(100);
 948 #else
 949                 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */
 950                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL,
 951                                       VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC);
 952                 udelay(2);
 953 #endif
 954                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 955                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 956                 udelay(100);
 957         }
 958
 959         pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval);
 960         if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) {
 961                 /* ACLink on, deassert ACLink reset, VSR, SGD data out */
 962                 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT);
 963                 udelay(100);
 964         }
 965
 966         /* wait until codec ready */
 967         max_count = ((3 * HZ) / 4) + 1;
 968         do {
 969                 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval);
 970                 if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */
 971                         break;
 972                 set_current_state(TASK_UNINTERRUPTIBLE);
 973                 schedule_timeout(1);
 974         } while (--max_count > 0);
 975
 976         if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_BUSY)
 977                 snd_printk("AC'97 codec is not ready [0x%x]\n", val);
 978
 979         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
 980                                  VIA_REG_AC97_SECONDARY_VALID |
 981                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
 982         max_count = ((3 * HZ) / 4) + 1;
 983         snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ |
 984                                  VIA_REG_AC97_SECONDARY_VALID |
 985                                  (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT));
 986         do {
 987                 if ((val = snd_via82xx_codec_xread(chip)) & VIA_REG_AC97_SECONDARY_VALID) {
 988                         chip->ac97_secondary = 1;
 989                         goto __ac97_ok2;
 990                 }
 991                 set_current_state(TASK_INTERRUPTIBLE);
 992                 schedule_timeout(1);
 993         } while (--max_count > 0);
 994         /* This is ok, the most of motherboards have only one codec */
 995
 996       __ac97_ok2:
 997
 998         /* route FM trap to IRQ, disable FM trap */
 999         // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0);
1000         /* disable all GPI interrupts */
1001         outl(0, VIAREG(chip, GPI_INTR));
1002
1003         return 0;
1004 }
1005
1006 #ifdef CONFIG_PM
1007 /*
1008  * power management
1009  */
1010 static int snd_via82xx_suspend(snd_card_t *card, pm_message_t state)
1011 {
1012         via82xx_t *chip = card->pm_private_data;
1013         int i;
1014
1015         for (i = 0; i < 2; i++)
1016                 if (chip->pcms[i])
1017                         snd_pcm_suspend_all(chip->pcms[i]);
1018         for (i = 0; i < chip->num_devs; i++)
1019                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1020         synchronize_irq(chip->irq);
1021         snd_ac97_suspend(chip->ac97);
1022         pci_set_power_state(chip->pci, 3);
1023         pci_disable_device(chip->pci);
1024         return 0;
1025 }
1026
1027 static int snd_via82xx_resume(snd_card_t *card)
1028 {
1029         via82xx_t *chip = card->pm_private_data;
1030         int i;
1031
1032         pci_enable_device(chip->pci);
1033         pci_set_power_state(chip->pci, 0);
1034         pci_set_master(chip->pci);
1035
1036         snd_via82xx_chip_init(chip);
1037
1038         snd_ac97_resume(chip->ac97);
1039
1040         for (i = 0; i < chip->num_devs; i++)
1041                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1042
1043         return 0;
1044 }
1045 #endif /* CONFIG_PM */
1046
1047 static int snd_via82xx_free(via82xx_t *chip)
1048 {
1049         unsigned int i;
1050
1051         if (chip->irq < 0)
1052                 goto __end_hw;
1053         /* disable interrupts */
1054         for (i = 0; i < chip->num_devs; i++)
1055                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1056         synchronize_irq(chip->irq);
1057       __end_hw:
1058         if (chip->irq >= 0)
1059                 free_irq(chip->irq, (void *)chip);
1060         pci_release_regions(chip->pci);
1061         pci_disable_device(chip->pci);
1062         kfree(chip);
1063         return 0;
1064 }
1065
1066 static int snd_via82xx_dev_free(snd_device_t *device)
1067 {
1068         via82xx_t *chip = device->device_data;
1069         return snd_via82xx_free(chip);
1070 }
1071
1072 static int __devinit snd_via82xx_create(snd_card_t * card,
1073                                         struct pci_dev *pci,
1074                                         int chip_type,
1075                                         int revision,
1076                                         unsigned int ac97_clock,
1077                                         via82xx_t ** r_via)
1078 {
1079         via82xx_t *chip;
1080         int err;
1081         static snd_device_ops_t ops = {
1082                 .dev_free =     snd_via82xx_dev_free,
1083         };
1084
1085         if ((err = pci_enable_device(pci)) < 0)
1086                 return err;
1087
1088         if ((chip = kcalloc(1, sizeof(*chip), GFP_KERNEL)) == NULL) {
1089                 pci_disable_device(pci);
1090                 return -ENOMEM;
1091         }
1092
1093         spin_lock_init(&chip->reg_lock);
1094         chip->card = card;
1095         chip->pci = pci;
1096         chip->irq = -1;
1097
1098         if ((err = pci_request_regions(pci, card->driver)) < 0) {
1099                 kfree(chip);
1100                 pci_disable_device(pci);
1101                 return err;
1102         }
1103         chip->port = pci_resource_start(pci, 0);
1104         if (request_irq(pci->irq, snd_via82xx_interrupt, SA_INTERRUPT|SA_SHIRQ,
1105                         card->driver, (void *)chip)) {
1106                 snd_printk("unable to grab IRQ %d\n", pci->irq);
1107                 snd_via82xx_free(chip);
1108                 return -EBUSY;
1109         }
1110         chip->irq = pci->irq;
1111         if (ac97_clock >= 8000 && ac97_clock <= 48000)
1112                 chip->ac97_clock = ac97_clock;
1113         synchronize_irq(chip->irq);
1114
1115         if ((err = snd_via82xx_chip_init(chip)) < 0) {
1116                 snd_via82xx_free(chip);
1117                 return err;
1118         }
1119
1120         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1121                 snd_via82xx_free(chip);
1122                 return err;
1123         }
1124
1125         /* The 8233 ac97 controller does not implement the master bit
1126          * in the pci command register. IMHO this is a violation of the PCI spec.
1127          * We call pci_set_master here because it does not hurt. */
1128         pci_set_master(pci);
1129
1130         snd_card_set_dev(card, &pci->dev);
1131
1132         *r_via = chip;
1133         return 0;
1134 }
1135
1136
1137 static int __devinit snd_via82xx_probe(struct pci_dev *pci,
1138                                        const struct pci_device_id *pci_id)
1139 {
1140         static int dev;
1141         snd_card_t *card;
1142         via82xx_t *chip;
1143         unsigned char revision;
1144         int chip_type = 0, card_type;
1145         unsigned int i;
1146         int err;
1147
1148         if (dev >= SNDRV_CARDS)
1149                 return -ENODEV;
1150         if (!enable[dev]) {
1151                 dev++;
1152                 return -ENOENT;
1153         }
1154
1155         card = snd_card_new(index[dev], id[dev], THIS_MODULE, 0);
1156         if (card == NULL)
1157                 return -ENOMEM;
1158
1159         card_type = pci_id->driver_data;
1160         pci_read_config_byte(pci, PCI_REVISION_ID, &revision);
1161         switch (card_type) {
1162         case TYPE_CARD_VIA82XX_MODEM:
1163                 strcpy(card->driver, "VIA82XX-MODEM");
1164                 sprintf(card->shortname, "VIA 82XX modem");
1165                 break;
1166         default:
1167                 snd_printk(KERN_ERR "invalid card type %d\n", card_type);
1168                 err = -EINVAL;
1169                 goto __error;
1170         }
1171
1172         if ((err = snd_via82xx_create(card, pci, chip_type, revision, ac97_clock[dev], &chip)) < 0)
1173                 goto __error;
1174         if ((err = snd_via82xx_mixer_new(chip)) < 0)
1175                 goto __error;
1176
1177         if ((err = snd_via686_pcm_new(chip)) < 0 )
1178                 goto __error;
1179
1180         snd_card_set_pm_callback(card, snd_via82xx_suspend, snd_via82xx_resume, chip);
1181
1182         /* disable interrupts */
1183         for (i = 0; i < chip->num_devs; i++)
1184                 snd_via82xx_channel_reset(chip, &chip->devs[i]);
1185
1186         sprintf(card->longname, "%s at 0x%lx, irq %d",
1187                 card->shortname, chip->port, chip->irq);
1188
1189         snd_via82xx_proc_init(chip);
1190
1191         if ((err = snd_card_register(card)) < 0) {
1192                 snd_card_free(card);
1193                 return err;
1194         }
1195         pci_set_drvdata(pci, card);
1196         dev++;
1197         return 0;
1198
1199  __error:
1200         snd_card_free(card);
1201         return err;
1202 }
1203
1204 static void __devexit snd_via82xx_remove(struct pci_dev *pci)
1205 {
1206         snd_card_free(pci_get_drvdata(pci));
1207         pci_set_drvdata(pci, NULL);
1208 }
1209
1210 static struct pci_driver driver = {
1211         .name = "VIA 82xx Modem",
1212         .id_table = snd_via82xx_modem_ids,
1213         .probe = snd_via82xx_probe,
1214         .remove = __devexit_p(snd_via82xx_remove),
1215         SND_PCI_PM_CALLBACKS
1216 };
1217
1218 static int __init alsa_card_via82xx_init(void)
1219 {
1220         return pci_register_driver(&driver);
1221 }
1222
1223 static void __exit alsa_card_via82xx_exit(void)
1224 {
1225         pci_unregister_driver(&driver);
1226 }
1227
1228 module_init(alsa_card_via82xx_init)
1229 module_exit(alsa_card_via82xx_exit)