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 42 static int index = -2; /* Exclude the first card */ 43 static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */ 44 static int ac97_clock = 48000; 45 46 module_param(index, int, 0444); 47 MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge."); 48 module_param(id, charp, 0444); 49 MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge."); 50 module_param(ac97_clock, int, 0444); 51 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz)."); 52 53 /* just for backward compatibility */ 54 static bool enable; 55 module_param(enable, bool, 0444); 56 57 58 /* 59 * Direct registers 60 */ 61 62 #define VIAREG(via, x) ((via)->port + VIA_REG_##x) 63 #define VIADEV_REG(viadev, x) ((viadev)->port + VIA_REG_##x) 64 65 /* common offsets */ 66 #define VIA_REG_OFFSET_STATUS 0x00 /* byte - channel status */ 67 #define VIA_REG_STAT_ACTIVE 0x80 /* RO */ 68 #define VIA_REG_STAT_PAUSED 0x40 /* RO */ 69 #define VIA_REG_STAT_TRIGGER_QUEUED 0x08 /* RO */ 70 #define VIA_REG_STAT_STOPPED 0x04 /* RWC */ 71 #define VIA_REG_STAT_EOL 0x02 /* RWC */ 72 #define VIA_REG_STAT_FLAG 0x01 /* RWC */ 73 #define VIA_REG_OFFSET_CONTROL 0x01 /* byte - channel control */ 74 #define VIA_REG_CTRL_START 0x80 /* WO */ 75 #define VIA_REG_CTRL_TERMINATE 0x40 /* WO */ 76 #define VIA_REG_CTRL_AUTOSTART 0x20 77 #define VIA_REG_CTRL_PAUSE 0x08 /* RW */ 78 #define VIA_REG_CTRL_INT_STOP 0x04 79 #define VIA_REG_CTRL_INT_EOL 0x02 80 #define VIA_REG_CTRL_INT_FLAG 0x01 81 #define VIA_REG_CTRL_RESET 0x01 /* RW - probably reset? undocumented */ 82 #define VIA_REG_CTRL_INT (VIA_REG_CTRL_INT_FLAG | VIA_REG_CTRL_INT_EOL | VIA_REG_CTRL_AUTOSTART) 83 #define VIA_REG_OFFSET_TYPE 0x02 /* byte - channel type (686 only) */ 84 #define VIA_REG_TYPE_AUTOSTART 0x80 /* RW - autostart at EOL */ 85 #define VIA_REG_TYPE_16BIT 0x20 /* RW */ 86 #define VIA_REG_TYPE_STEREO 0x10 /* RW */ 87 #define VIA_REG_TYPE_INT_LLINE 0x00 88 #define VIA_REG_TYPE_INT_LSAMPLE 0x04 89 #define VIA_REG_TYPE_INT_LESSONE 0x08 90 #define VIA_REG_TYPE_INT_MASK 0x0c 91 #define VIA_REG_TYPE_INT_EOL 0x02 92 #define VIA_REG_TYPE_INT_FLAG 0x01 93 #define VIA_REG_OFFSET_TABLE_PTR 0x04 /* dword - channel table pointer */ 94 #define VIA_REG_OFFSET_CURR_PTR 0x04 /* dword - channel current pointer */ 95 #define VIA_REG_OFFSET_STOP_IDX 0x08 /* dword - stop index, channel type, sample rate */ 96 #define VIA_REG_OFFSET_CURR_COUNT 0x0c /* dword - channel current count (24 bit) */ 97 #define VIA_REG_OFFSET_CURR_INDEX 0x0f /* byte - channel current index (for via8233 only) */ 98 99 #define DEFINE_VIA_REGSET(name,val) \ 100 enum {\ 101 VIA_REG_##name##_STATUS = (val),\ 102 VIA_REG_##name##_CONTROL = (val) + 0x01,\ 103 VIA_REG_##name##_TYPE = (val) + 0x02,\ 104 VIA_REG_##name##_TABLE_PTR = (val) + 0x04,\ 105 VIA_REG_##name##_CURR_PTR = (val) + 0x04,\ 106 VIA_REG_##name##_STOP_IDX = (val) + 0x08,\ 107 VIA_REG_##name##_CURR_COUNT = (val) + 0x0c,\ 108 } 109 110 /* modem block */ 111 DEFINE_VIA_REGSET(MO, 0x40); 112 DEFINE_VIA_REGSET(MI, 0x50); 113 114 /* AC'97 */ 115 #define VIA_REG_AC97 0x80 /* dword */ 116 #define VIA_REG_AC97_CODEC_ID_MASK (3<<30) 117 #define VIA_REG_AC97_CODEC_ID_SHIFT 30 118 #define VIA_REG_AC97_CODEC_ID_PRIMARY 0x00 119 #define VIA_REG_AC97_CODEC_ID_SECONDARY 0x01 120 #define VIA_REG_AC97_SECONDARY_VALID (1<<27) 121 #define VIA_REG_AC97_PRIMARY_VALID (1<<25) 122 #define VIA_REG_AC97_BUSY (1<<24) 123 #define VIA_REG_AC97_READ (1<<23) 124 #define VIA_REG_AC97_CMD_SHIFT 16 125 #define VIA_REG_AC97_CMD_MASK 0x7e 126 #define VIA_REG_AC97_DATA_SHIFT 0 127 #define VIA_REG_AC97_DATA_MASK 0xffff 128 129 #define VIA_REG_SGD_SHADOW 0x84 /* dword */ 130 #define VIA_REG_SGD_STAT_PB_FLAG (1<<0) 131 #define VIA_REG_SGD_STAT_CP_FLAG (1<<1) 132 #define VIA_REG_SGD_STAT_FM_FLAG (1<<2) 133 #define VIA_REG_SGD_STAT_PB_EOL (1<<4) 134 #define VIA_REG_SGD_STAT_CP_EOL (1<<5) 135 #define VIA_REG_SGD_STAT_FM_EOL (1<<6) 136 #define VIA_REG_SGD_STAT_PB_STOP (1<<8) 137 #define VIA_REG_SGD_STAT_CP_STOP (1<<9) 138 #define VIA_REG_SGD_STAT_FM_STOP (1<<10) 139 #define VIA_REG_SGD_STAT_PB_ACTIVE (1<<12) 140 #define VIA_REG_SGD_STAT_CP_ACTIVE (1<<13) 141 #define VIA_REG_SGD_STAT_FM_ACTIVE (1<<14) 142 #define VIA_REG_SGD_STAT_MR_FLAG (1<<16) 143 #define VIA_REG_SGD_STAT_MW_FLAG (1<<17) 144 #define VIA_REG_SGD_STAT_MR_EOL (1<<20) 145 #define VIA_REG_SGD_STAT_MW_EOL (1<<21) 146 #define VIA_REG_SGD_STAT_MR_STOP (1<<24) 147 #define VIA_REG_SGD_STAT_MW_STOP (1<<25) 148 #define VIA_REG_SGD_STAT_MR_ACTIVE (1<<28) 149 #define VIA_REG_SGD_STAT_MW_ACTIVE (1<<29) 150 151 #define VIA_REG_GPI_STATUS 0x88 152 #define VIA_REG_GPI_INTR 0x8c 153 154 #define VIA_TBL_BIT_FLAG 0x40000000 155 #define VIA_TBL_BIT_EOL 0x80000000 156 157 /* pci space */ 158 #define VIA_ACLINK_STAT 0x40 159 #define VIA_ACLINK_C11_READY 0x20 160 #define VIA_ACLINK_C10_READY 0x10 161 #define VIA_ACLINK_C01_READY 0x04 /* secondary codec ready */ 162 #define VIA_ACLINK_LOWPOWER 0x02 /* low-power state */ 163 #define VIA_ACLINK_C00_READY 0x01 /* primary codec ready */ 164 #define VIA_ACLINK_CTRL 0x41 165 #define VIA_ACLINK_CTRL_ENABLE 0x80 /* 0: disable, 1: enable */ 166 #define VIA_ACLINK_CTRL_RESET 0x40 /* 0: assert, 1: de-assert */ 167 #define VIA_ACLINK_CTRL_SYNC 0x20 /* 0: release SYNC, 1: force SYNC hi */ 168 #define VIA_ACLINK_CTRL_SDO 0x10 /* 0: release SDO, 1: force SDO hi */ 169 #define VIA_ACLINK_CTRL_VRA 0x08 /* 0: disable VRA, 1: enable VRA */ 170 #define VIA_ACLINK_CTRL_PCM 0x04 /* 0: disable PCM, 1: enable PCM */ 171 #define VIA_ACLINK_CTRL_FM 0x02 /* via686 only */ 172 #define VIA_ACLINK_CTRL_SB 0x01 /* via686 only */ 173 #define VIA_ACLINK_CTRL_INIT (VIA_ACLINK_CTRL_ENABLE|\ 174 VIA_ACLINK_CTRL_RESET|\ 175 VIA_ACLINK_CTRL_PCM) 176 #define VIA_FUNC_ENABLE 0x42 177 #define VIA_FUNC_MIDI_PNP 0x80 /* FIXME: it's 0x40 in the datasheet! */ 178 #define VIA_FUNC_MIDI_IRQMASK 0x40 /* FIXME: not documented! */ 179 #define VIA_FUNC_RX2C_WRITE 0x20 180 #define VIA_FUNC_SB_FIFO_EMPTY 0x10 181 #define VIA_FUNC_ENABLE_GAME 0x08 182 #define VIA_FUNC_ENABLE_FM 0x04 183 #define VIA_FUNC_ENABLE_MIDI 0x02 184 #define VIA_FUNC_ENABLE_SB 0x01 185 #define VIA_PNP_CONTROL 0x43 186 #define VIA_MC97_CTRL 0x44 187 #define VIA_MC97_CTRL_ENABLE 0x80 188 #define VIA_MC97_CTRL_SECONDARY 0x40 189 #define VIA_MC97_CTRL_INIT (VIA_MC97_CTRL_ENABLE|\ 190 VIA_MC97_CTRL_SECONDARY) 191 192 193 /* 194 * pcm stream 195 */ 196 197 struct snd_via_sg_table { 198 unsigned int offset; 199 unsigned int size; 200 } ; 201 202 #define VIA_TABLE_SIZE 255 203 204 struct viadev { 205 unsigned int reg_offset; 206 unsigned long port; 207 int direction; /* playback = 0, capture = 1 */ 208 struct snd_pcm_substream *substream; 209 int running; 210 unsigned int tbl_entries; /* # descriptors */ 211 struct snd_dma_buffer table; 212 struct snd_via_sg_table *idx_table; 213 /* for recovery from the unexpected pointer */ 214 unsigned int lastpos; 215 unsigned int bufsize; 216 unsigned int bufsize2; 217 }; 218 219 enum { TYPE_CARD_VIA82XX_MODEM = 1 }; 220 221 #define VIA_MAX_MODEM_DEVS 2 222 223 struct via82xx_modem { 224 int irq; 225 226 unsigned long port; 227 228 unsigned int intr_mask; /* SGD_SHADOW mask to check interrupts */ 229 230 struct pci_dev *pci; 231 struct snd_card *card; 232 233 unsigned int num_devs; 234 unsigned int playback_devno, capture_devno; 235 struct viadev devs[VIA_MAX_MODEM_DEVS]; 236 237 struct snd_pcm *pcms[2]; 238 239 struct snd_ac97_bus *ac97_bus; 240 struct snd_ac97 *ac97; 241 unsigned int ac97_clock; 242 unsigned int ac97_secondary; /* secondary AC'97 codec is present */ 243 244 spinlock_t reg_lock; 245 struct snd_info_entry *proc_entry; 246 }; 247 248 static const struct pci_device_id snd_via82xx_modem_ids[] = { 249 { PCI_VDEVICE(VIA, 0x3068), TYPE_CARD_VIA82XX_MODEM, }, 250 { 0, } 251 }; 252 253 MODULE_DEVICE_TABLE(pci, snd_via82xx_modem_ids); 254 255 /* 256 */ 257 258 /* 259 * allocate and initialize the descriptor buffers 260 * periods = number of periods 261 * fragsize = period size in bytes 262 */ 263 static int build_via_table(struct viadev *dev, struct snd_pcm_substream *substream, 264 struct pci_dev *pci, 265 unsigned int periods, unsigned int fragsize) 266 { 267 unsigned int i, idx, ofs, rest; 268 struct via82xx_modem *chip = snd_pcm_substream_chip(substream); 269 __le32 *pgtbl; 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 pgtbl = (__le32 *)dev->table.area; 292 for (i = 0; i < periods; i++) { 293 rest = fragsize; 294 /* fill descriptors for a period. 295 * a period can be split to several descriptors if it's 296 * over page boundary. 297 */ 298 do { 299 unsigned int r; 300 unsigned int flag; 301 unsigned int addr; 302 303 if (idx >= VIA_TABLE_SIZE) { 304 dev_err(&pci->dev, "too much table size!\n"); 305 return -EINVAL; 306 } 307 addr = snd_pcm_sgbuf_get_addr(substream, ofs); 308 pgtbl[idx << 1] = cpu_to_le32(addr); 309 r = PAGE_SIZE - (ofs % PAGE_SIZE); 310 if (rest < r) 311 r = rest; 312 rest -= r; 313 if (! rest) { 314 if (i == periods - 1) 315 flag = VIA_TBL_BIT_EOL; /* buffer boundary */ 316 else 317 flag = VIA_TBL_BIT_FLAG; /* period boundary */ 318 } else 319 flag = 0; /* period continues to the next */ 320 /* 321 dev_dbg(&pci->dev, 322 "tbl %d: at %d size %d (rest %d)\n", 323 idx, ofs, r, rest); 324 */ 325 pgtbl[(idx<<1) + 1] = cpu_to_le32(r | flag); 326 dev->idx_table[idx].offset = ofs; 327 dev->idx_table[idx].size = r; 328 ofs += r; 329 idx++; 330 } while (rest > 0); 331 } 332 dev->tbl_entries = idx; 333 dev->bufsize = periods * fragsize; 334 dev->bufsize2 = dev->bufsize / 2; 335 return 0; 336 } 337 338 339 static int clean_via_table(struct viadev *dev, struct snd_pcm_substream *substream, 340 struct pci_dev *pci) 341 { 342 if (dev->table.area) { 343 snd_dma_free_pages(&dev->table); 344 dev->table.area = NULL; 345 } 346 kfree(dev->idx_table); 347 dev->idx_table = NULL; 348 return 0; 349 } 350 351 /* 352 * Basic I/O 353 */ 354 355 static inline unsigned int snd_via82xx_codec_xread(struct via82xx_modem *chip) 356 { 357 return inl(VIAREG(chip, AC97)); 358 } 359 360 static inline void snd_via82xx_codec_xwrite(struct via82xx_modem *chip, unsigned int val) 361 { 362 outl(val, VIAREG(chip, AC97)); 363 } 364 365 static int snd_via82xx_codec_ready(struct via82xx_modem *chip, int secondary) 366 { 367 unsigned int timeout = 1000; /* 1ms */ 368 unsigned int val; 369 370 while (timeout-- > 0) { 371 udelay(1); 372 val = snd_via82xx_codec_xread(chip); 373 if (!(val & VIA_REG_AC97_BUSY)) 374 return val & 0xffff; 375 } 376 dev_err(chip->card->dev, "codec_ready: codec %i is not ready [0x%x]\n", 377 secondary, snd_via82xx_codec_xread(chip)); 378 return -EIO; 379 } 380 381 static int snd_via82xx_codec_valid(struct via82xx_modem *chip, int secondary) 382 { 383 unsigned int timeout = 1000; /* 1ms */ 384 unsigned int val, val1; 385 unsigned int stat = !secondary ? VIA_REG_AC97_PRIMARY_VALID : 386 VIA_REG_AC97_SECONDARY_VALID; 387 388 while (timeout-- > 0) { 389 val = snd_via82xx_codec_xread(chip); 390 val1 = val & (VIA_REG_AC97_BUSY | stat); 391 if (val1 == stat) 392 return val & 0xffff; 393 udelay(1); 394 } 395 return -EIO; 396 } 397 398 static void snd_via82xx_codec_wait(struct snd_ac97 *ac97) 399 { 400 struct via82xx_modem *chip = ac97->private_data; 401 __always_unused int err; 402 err = snd_via82xx_codec_ready(chip, ac97->num); 403 /* here we need to wait fairly for long time.. */ 404 msleep(500); 405 } 406 407 static void snd_via82xx_codec_write(struct snd_ac97 *ac97, 408 unsigned short reg, 409 unsigned short val) 410 { 411 struct via82xx_modem *chip = ac97->private_data; 412 unsigned int xval; 413 if(reg == AC97_GPIO_STATUS) { 414 outl(val, VIAREG(chip, GPI_STATUS)); 415 return; 416 } 417 xval = !ac97->num ? VIA_REG_AC97_CODEC_ID_PRIMARY : VIA_REG_AC97_CODEC_ID_SECONDARY; 418 xval <<= VIA_REG_AC97_CODEC_ID_SHIFT; 419 xval |= reg << VIA_REG_AC97_CMD_SHIFT; 420 xval |= val << VIA_REG_AC97_DATA_SHIFT; 421 snd_via82xx_codec_xwrite(chip, xval); 422 snd_via82xx_codec_ready(chip, ac97->num); 423 } 424 425 static unsigned short snd_via82xx_codec_read(struct snd_ac97 *ac97, unsigned short reg) 426 { 427 struct via82xx_modem *chip = ac97->private_data; 428 unsigned int xval, val = 0xffff; 429 int again = 0; 430 431 xval = ac97->num << VIA_REG_AC97_CODEC_ID_SHIFT; 432 xval |= ac97->num ? VIA_REG_AC97_SECONDARY_VALID : VIA_REG_AC97_PRIMARY_VALID; 433 xval |= VIA_REG_AC97_READ; 434 xval |= (reg & 0x7f) << VIA_REG_AC97_CMD_SHIFT; 435 while (1) { 436 if (again++ > 3) { 437 dev_err(chip->card->dev, 438 "codec_read: codec %i is not valid [0x%x]\n", 439 ac97->num, snd_via82xx_codec_xread(chip)); 440 return 0xffff; 441 } 442 snd_via82xx_codec_xwrite(chip, xval); 443 udelay (20); 444 if (snd_via82xx_codec_valid(chip, ac97->num) >= 0) { 445 udelay(25); 446 val = snd_via82xx_codec_xread(chip); 447 break; 448 } 449 } 450 return val & 0xffff; 451 } 452 453 static void snd_via82xx_channel_reset(struct via82xx_modem *chip, struct viadev *viadev) 454 { 455 outb(VIA_REG_CTRL_PAUSE | VIA_REG_CTRL_TERMINATE | VIA_REG_CTRL_RESET, 456 VIADEV_REG(viadev, OFFSET_CONTROL)); 457 inb(VIADEV_REG(viadev, OFFSET_CONTROL)); 458 udelay(50); 459 /* disable interrupts */ 460 outb(0x00, VIADEV_REG(viadev, OFFSET_CONTROL)); 461 /* clear interrupts */ 462 outb(0x03, VIADEV_REG(viadev, OFFSET_STATUS)); 463 outb(0x00, VIADEV_REG(viadev, OFFSET_TYPE)); /* for via686 */ 464 // outl(0, VIADEV_REG(viadev, OFFSET_CURR_PTR)); 465 viadev->lastpos = 0; 466 } 467 468 469 /* 470 * Interrupt handler 471 */ 472 473 static irqreturn_t snd_via82xx_interrupt(int irq, void *dev_id) 474 { 475 struct via82xx_modem *chip = dev_id; 476 unsigned int status; 477 unsigned int i; 478 479 status = inl(VIAREG(chip, SGD_SHADOW)); 480 if (! (status & chip->intr_mask)) { 481 return IRQ_NONE; 482 } 483 // _skip_sgd: 484 485 /* check status for each stream */ 486 spin_lock(&chip->reg_lock); 487 for (i = 0; i < chip->num_devs; i++) { 488 struct viadev *viadev = &chip->devs[i]; 489 unsigned char c_status = inb(VIADEV_REG(viadev, OFFSET_STATUS)); 490 c_status &= (VIA_REG_STAT_EOL|VIA_REG_STAT_FLAG|VIA_REG_STAT_STOPPED); 491 if (! c_status) 492 continue; 493 if (viadev->substream && viadev->running) { 494 spin_unlock(&chip->reg_lock); 495 snd_pcm_period_elapsed(viadev->substream); 496 spin_lock(&chip->reg_lock); 497 } 498 outb(c_status, VIADEV_REG(viadev, OFFSET_STATUS)); /* ack */ 499 } 500 spin_unlock(&chip->reg_lock); 501 return IRQ_HANDLED; 502 } 503 504 /* 505 * PCM callbacks 506 */ 507 508 /* 509 * trigger callback 510 */ 511 static int snd_via82xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 512 { 513 struct via82xx_modem *chip = snd_pcm_substream_chip(substream); 514 struct viadev *viadev = substream->runtime->private_data; 515 unsigned char val = 0; 516 517 switch (cmd) { 518 case SNDRV_PCM_TRIGGER_START: 519 case SNDRV_PCM_TRIGGER_SUSPEND: 520 val |= VIA_REG_CTRL_START; 521 viadev->running = 1; 522 break; 523 case SNDRV_PCM_TRIGGER_STOP: 524 val = VIA_REG_CTRL_TERMINATE; 525 viadev->running = 0; 526 break; 527 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 528 val |= VIA_REG_CTRL_PAUSE; 529 viadev->running = 0; 530 break; 531 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 532 viadev->running = 1; 533 break; 534 default: 535 return -EINVAL; 536 } 537 outb(val, VIADEV_REG(viadev, OFFSET_CONTROL)); 538 if (cmd == SNDRV_PCM_TRIGGER_STOP) 539 snd_via82xx_channel_reset(chip, viadev); 540 return 0; 541 } 542 543 /* 544 * pointer callbacks 545 */ 546 547 /* 548 * calculate the linear position at the given sg-buffer index and the rest count 549 */ 550 551 #define check_invalid_pos(viadev,pos) \ 552 ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 ||\ 553 viadev->lastpos < viadev->bufsize2)) 554 555 static inline unsigned int calc_linear_pos(struct via82xx_modem *chip, 556 struct viadev *viadev, 557 unsigned int idx, 558 unsigned int count) 559 { 560 unsigned int size, res; 561 562 size = viadev->idx_table[idx].size; 563 res = viadev->idx_table[idx].offset + size - count; 564 565 /* check the validity of the calculated position */ 566 if (size < count) { 567 dev_err(chip->card->dev, 568 "invalid via82xx_cur_ptr (size = %d, count = %d)\n", 569 (int)size, (int)count); 570 res = viadev->lastpos; 571 } else if (check_invalid_pos(viadev, res)) { 572 #ifdef POINTER_DEBUG 573 dev_dbg(chip->card->dev, 574 "fail: idx = %i/%i, lastpos = 0x%x, bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, count = 0x%x\n", 575 idx, viadev->tbl_entries, viadev->lastpos, 576 viadev->bufsize2, viadev->idx_table[idx].offset, 577 viadev->idx_table[idx].size, count); 578 #endif 579 if (count && size < count) { 580 dev_dbg(chip->card->dev, 581 "invalid via82xx_cur_ptr, using last valid pointer\n"); 582 res = viadev->lastpos; 583 } else { 584 if (! count) 585 /* bogus count 0 on the DMA boundary? */ 586 res = viadev->idx_table[idx].offset; 587 else 588 /* count register returns full size 589 * when end of buffer is reached 590 */ 591 res = viadev->idx_table[idx].offset + size; 592 if (check_invalid_pos(viadev, res)) { 593 dev_dbg(chip->card->dev, 594 "invalid via82xx_cur_ptr (2), using last valid pointer\n"); 595 res = viadev->lastpos; 596 } 597 } 598 } 599 viadev->lastpos = res; /* remember the last position */ 600 if (res >= viadev->bufsize) 601 res -= viadev->bufsize; 602 return res; 603 } 604 605 /* 606 * get the current pointer on via686 607 */ 608 static snd_pcm_uframes_t snd_via686_pcm_pointer(struct snd_pcm_substream *substream) 609 { 610 struct via82xx_modem *chip = snd_pcm_substream_chip(substream); 611 struct viadev *viadev = substream->runtime->private_data; 612 unsigned int idx, ptr, count, res; 613 614 if (snd_BUG_ON(!viadev->tbl_entries)) 615 return 0; 616 if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE)) 617 return 0; 618 619 spin_lock(&chip->reg_lock); 620 count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff; 621 /* The via686a does not have the current index register, 622 * so we need to calculate the index from CURR_PTR. 623 */ 624 ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR)); 625 if (ptr <= (unsigned int)viadev->table.addr) 626 idx = 0; 627 else /* CURR_PTR holds the address + 8 */ 628 idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) % 629 viadev->tbl_entries; 630 res = calc_linear_pos(chip, viadev, idx, count); 631 spin_unlock(&chip->reg_lock); 632 633 return bytes_to_frames(substream->runtime, res); 634 } 635 636 /* 637 * hw_params callback: 638 * allocate the buffer and build up the buffer description table 639 */ 640 static int snd_via82xx_hw_params(struct snd_pcm_substream *substream, 641 struct snd_pcm_hw_params *hw_params) 642 { 643 struct via82xx_modem *chip = snd_pcm_substream_chip(substream); 644 struct viadev *viadev = substream->runtime->private_data; 645 int err; 646 647 err = build_via_table(viadev, substream, chip->pci, 648 params_periods(hw_params), 649 params_period_bytes(hw_params)); 650 if (err < 0) 651 return err; 652 653 snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params)); 654 snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0); 655 656 return 0; 657 } 658 659 /* 660 * hw_free callback: 661 * clean up the buffer description table and release the buffer 662 */ 663 static int snd_via82xx_hw_free(struct snd_pcm_substream *substream) 664 { 665 struct via82xx_modem *chip = snd_pcm_substream_chip(substream); 666 struct viadev *viadev = substream->runtime->private_data; 667 668 clean_via_table(viadev, substream, chip->pci); 669 return 0; 670 } 671 672 673 /* 674 * set up the table pointer 675 */ 676 static void snd_via82xx_set_table_ptr(struct via82xx_modem *chip, struct viadev *viadev) 677 { 678 snd_via82xx_codec_ready(chip, chip->ac97_secondary); 679 outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR)); 680 udelay(20); 681 snd_via82xx_codec_ready(chip, chip->ac97_secondary); 682 } 683 684 /* 685 * prepare callback for playback and capture 686 */ 687 static int snd_via82xx_pcm_prepare(struct snd_pcm_substream *substream) 688 { 689 struct via82xx_modem *chip = snd_pcm_substream_chip(substream); 690 struct viadev *viadev = substream->runtime->private_data; 691 692 snd_via82xx_channel_reset(chip, viadev); 693 /* this must be set after channel_reset */ 694 snd_via82xx_set_table_ptr(chip, viadev); 695 outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG, 696 VIADEV_REG(viadev, OFFSET_TYPE)); 697 return 0; 698 } 699 700 /* 701 * pcm hardware definition, identical for both playback and capture 702 */ 703 static const struct snd_pcm_hardware snd_via82xx_hw = 704 { 705 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | 706 SNDRV_PCM_INFO_BLOCK_TRANSFER | 707 SNDRV_PCM_INFO_MMAP_VALID | 708 /* SNDRV_PCM_INFO_RESUME | */ 709 SNDRV_PCM_INFO_PAUSE), 710 .formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE, 711 .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT, 712 .rate_min = 8000, 713 .rate_max = 16000, 714 .channels_min = 1, 715 .channels_max = 1, 716 .buffer_bytes_max = 128 * 1024, 717 .period_bytes_min = 32, 718 .period_bytes_max = 128 * 1024, 719 .periods_min = 2, 720 .periods_max = VIA_TABLE_SIZE / 2, 721 .fifo_size = 0, 722 }; 723 724 725 /* 726 * open callback skeleton 727 */ 728 static int snd_via82xx_modem_pcm_open(struct via82xx_modem *chip, struct viadev *viadev, 729 struct snd_pcm_substream *substream) 730 { 731 struct snd_pcm_runtime *runtime = substream->runtime; 732 int err; 733 static const unsigned int rates[] = { 8000, 9600, 12000, 16000 }; 734 static const struct snd_pcm_hw_constraint_list hw_constraints_rates = { 735 .count = ARRAY_SIZE(rates), 736 .list = rates, 737 .mask = 0, 738 }; 739 740 runtime->hw = snd_via82xx_hw; 741 742 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 743 &hw_constraints_rates); 744 if (err < 0) 745 return err; 746 747 /* we may remove following constaint when we modify table entries 748 in interrupt */ 749 err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); 750 if (err < 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 .hw_params = snd_via82xx_hw_params, 799 .hw_free = snd_via82xx_hw_free, 800 .prepare = snd_via82xx_pcm_prepare, 801 .trigger = snd_via82xx_pcm_trigger, 802 .pointer = snd_via686_pcm_pointer, 803 }; 804 805 /* via686 capture callbacks */ 806 static const struct snd_pcm_ops snd_via686_capture_ops = { 807 .open = snd_via82xx_capture_open, 808 .close = snd_via82xx_pcm_close, 809 .hw_params = snd_via82xx_hw_params, 810 .hw_free = snd_via82xx_hw_free, 811 .prepare = snd_via82xx_pcm_prepare, 812 .trigger = snd_via82xx_pcm_trigger, 813 .pointer = snd_via686_pcm_pointer, 814 }; 815 816 817 static void init_viadev(struct via82xx_modem *chip, int idx, unsigned int reg_offset, 818 int direction) 819 { 820 chip->devs[idx].reg_offset = reg_offset; 821 chip->devs[idx].direction = direction; 822 chip->devs[idx].port = chip->port + reg_offset; 823 } 824 825 /* 826 * create a pcm instance for via686a/b 827 */ 828 static int snd_via686_pcm_new(struct via82xx_modem *chip) 829 { 830 struct snd_pcm *pcm; 831 int err; 832 833 chip->playback_devno = 0; 834 chip->capture_devno = 1; 835 chip->num_devs = 2; 836 chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */ 837 838 err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm); 839 if (err < 0) 840 return err; 841 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops); 842 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops); 843 pcm->dev_class = SNDRV_PCM_CLASS_MODEM; 844 pcm->private_data = chip; 845 strcpy(pcm->name, chip->card->shortname); 846 chip->pcms[0] = pcm; 847 init_viadev(chip, 0, VIA_REG_MO_STATUS, 0); 848 init_viadev(chip, 1, VIA_REG_MI_STATUS, 1); 849 850 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV_SG, 851 &chip->pci->dev, 64*1024, 128*1024); 852 return 0; 853 } 854 855 856 /* 857 * Mixer part 858 */ 859 860 861 static void snd_via82xx_mixer_free_ac97_bus(struct snd_ac97_bus *bus) 862 { 863 struct via82xx_modem *chip = bus->private_data; 864 chip->ac97_bus = NULL; 865 } 866 867 static void snd_via82xx_mixer_free_ac97(struct snd_ac97 *ac97) 868 { 869 struct via82xx_modem *chip = ac97->private_data; 870 chip->ac97 = NULL; 871 } 872 873 874 static int snd_via82xx_mixer_new(struct via82xx_modem *chip) 875 { 876 struct snd_ac97_template ac97; 877 int err; 878 static const struct snd_ac97_bus_ops ops = { 879 .write = snd_via82xx_codec_write, 880 .read = snd_via82xx_codec_read, 881 .wait = snd_via82xx_codec_wait, 882 }; 883 884 err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus); 885 if (err < 0) 886 return err; 887 chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus; 888 chip->ac97_bus->clock = chip->ac97_clock; 889 890 memset(&ac97, 0, sizeof(ac97)); 891 ac97.private_data = chip; 892 ac97.private_free = snd_via82xx_mixer_free_ac97; 893 ac97.pci = chip->pci; 894 ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE; 895 ac97.num = chip->ac97_secondary; 896 897 err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97); 898 if (err < 0) 899 return err; 900 901 return 0; 902 } 903 904 905 /* 906 * proc interface 907 */ 908 static void snd_via82xx_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer) 909 { 910 struct via82xx_modem *chip = entry->private_data; 911 int i; 912 913 snd_iprintf(buffer, "%s\n\n", chip->card->longname); 914 for (i = 0; i < 0xa0; i += 4) { 915 snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i)); 916 } 917 } 918 919 static void snd_via82xx_proc_init(struct via82xx_modem *chip) 920 { 921 snd_card_ro_proc_new(chip->card, "via82xx", chip, 922 snd_via82xx_proc_read); 923 } 924 925 /* 926 * 927 */ 928 929 static int snd_via82xx_chip_init(struct via82xx_modem *chip) 930 { 931 unsigned int val; 932 unsigned long end_time; 933 unsigned char pval; 934 935 pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval); 936 if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) { 937 pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT); 938 udelay(100); 939 } 940 941 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval); 942 if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */ 943 /* deassert ACLink reset, force SYNC */ 944 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 945 VIA_ACLINK_CTRL_ENABLE | 946 VIA_ACLINK_CTRL_RESET | 947 VIA_ACLINK_CTRL_SYNC); 948 udelay(100); 949 #if 1 /* FIXME: should we do full reset here for all chip models? */ 950 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00); 951 udelay(100); 952 #else 953 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */ 954 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 955 VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC); 956 udelay(2); 957 #endif 958 /* ACLink on, deassert ACLink reset, VSR, SGD data out */ 959 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT); 960 udelay(100); 961 } 962 963 pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval); 964 if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) { 965 /* ACLink on, deassert ACLink reset, VSR, SGD data out */ 966 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT); 967 udelay(100); 968 } 969 970 /* wait until codec ready */ 971 end_time = jiffies + msecs_to_jiffies(750); 972 do { 973 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval); 974 if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */ 975 break; 976 schedule_timeout_uninterruptible(1); 977 } while (time_before(jiffies, end_time)); 978 979 val = snd_via82xx_codec_xread(chip); 980 if (val & 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 val = snd_via82xx_codec_xread(chip); 993 if (val & VIA_REG_AC97_SECONDARY_VALID) { 994 chip->ac97_secondary = 1; 995 goto __ac97_ok2; 996 } 997 schedule_timeout_uninterruptible(1); 998 } while (time_before(jiffies, end_time)); 999 /* This is ok, the most of motherboards have only one codec */ 1000 1001 __ac97_ok2: 1002 1003 /* route FM trap to IRQ, disable FM trap */ 1004 // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0); 1005 /* disable all GPI interrupts */ 1006 outl(0, VIAREG(chip, GPI_INTR)); 1007 1008 return 0; 1009 } 1010 1011 #ifdef CONFIG_PM_SLEEP 1012 /* 1013 * power management 1014 */ 1015 static int snd_via82xx_suspend(struct device *dev) 1016 { 1017 struct snd_card *card = dev_get_drvdata(dev); 1018 struct via82xx_modem *chip = card->private_data; 1019 int i; 1020 1021 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot); 1022 for (i = 0; i < chip->num_devs; i++) 1023 snd_via82xx_channel_reset(chip, &chip->devs[i]); 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 void snd_via82xx_free(struct snd_card *card) 1052 { 1053 struct via82xx_modem *chip = card->private_data; 1054 unsigned int i; 1055 1056 /* disable interrupts */ 1057 for (i = 0; i < chip->num_devs; i++) 1058 snd_via82xx_channel_reset(chip, &chip->devs[i]); 1059 } 1060 1061 static int snd_via82xx_create(struct snd_card *card, 1062 struct pci_dev *pci, 1063 int chip_type, 1064 int revision, 1065 unsigned int ac97_clock) 1066 { 1067 struct via82xx_modem *chip = card->private_data; 1068 int err; 1069 1070 err = pcim_enable_device(pci); 1071 if (err < 0) 1072 return err; 1073 1074 spin_lock_init(&chip->reg_lock); 1075 chip->card = card; 1076 chip->pci = pci; 1077 chip->irq = -1; 1078 1079 err = pci_request_regions(pci, card->driver); 1080 if (err < 0) 1081 return err; 1082 chip->port = pci_resource_start(pci, 0); 1083 if (devm_request_irq(&pci->dev, pci->irq, snd_via82xx_interrupt, 1084 IRQF_SHARED, KBUILD_MODNAME, chip)) { 1085 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq); 1086 return -EBUSY; 1087 } 1088 chip->irq = pci->irq; 1089 card->sync_irq = chip->irq; 1090 card->private_free = snd_via82xx_free; 1091 if (ac97_clock >= 8000 && ac97_clock <= 48000) 1092 chip->ac97_clock = ac97_clock; 1093 1094 err = snd_via82xx_chip_init(chip); 1095 if (err < 0) 1096 return err; 1097 1098 /* The 8233 ac97 controller does not implement the master bit 1099 * in the pci command register. IMHO this is a violation of the PCI spec. 1100 * We call pci_set_master here because it does not hurt. */ 1101 pci_set_master(pci); 1102 return 0; 1103 } 1104 1105 1106 static int __snd_via82xx_probe(struct pci_dev *pci, 1107 const struct pci_device_id *pci_id) 1108 { 1109 struct snd_card *card; 1110 struct via82xx_modem *chip; 1111 int chip_type = 0, card_type; 1112 unsigned int i; 1113 int err; 1114 1115 err = snd_devm_card_new(&pci->dev, index, id, THIS_MODULE, 1116 sizeof(*chip), &card); 1117 if (err < 0) 1118 return err; 1119 chip = card->private_data; 1120 1121 card_type = pci_id->driver_data; 1122 switch (card_type) { 1123 case TYPE_CARD_VIA82XX_MODEM: 1124 strcpy(card->driver, "VIA82XX-MODEM"); 1125 sprintf(card->shortname, "VIA 82XX modem"); 1126 break; 1127 default: 1128 dev_err(card->dev, "invalid card type %d\n", card_type); 1129 return -EINVAL; 1130 } 1131 1132 err = snd_via82xx_create(card, pci, chip_type, pci->revision, 1133 ac97_clock); 1134 if (err < 0) 1135 return err; 1136 err = snd_via82xx_mixer_new(chip); 1137 if (err < 0) 1138 return err; 1139 1140 err = snd_via686_pcm_new(chip); 1141 if (err < 0) 1142 return err; 1143 1144 /* disable interrupts */ 1145 for (i = 0; i < chip->num_devs; i++) 1146 snd_via82xx_channel_reset(chip, &chip->devs[i]); 1147 1148 sprintf(card->longname, "%s at 0x%lx, irq %d", 1149 card->shortname, chip->port, chip->irq); 1150 1151 snd_via82xx_proc_init(chip); 1152 1153 err = snd_card_register(card); 1154 if (err < 0) 1155 return err; 1156 pci_set_drvdata(pci, card); 1157 return 0; 1158 } 1159 1160 static int snd_via82xx_probe(struct pci_dev *pci, 1161 const struct pci_device_id *pci_id) 1162 { 1163 return snd_card_free_on_error(&pci->dev, __snd_via82xx_probe(pci, pci_id)); 1164 } 1165 1166 static struct pci_driver via82xx_modem_driver = { 1167 .name = KBUILD_MODNAME, 1168 .id_table = snd_via82xx_modem_ids, 1169 .probe = snd_via82xx_probe, 1170 .driver = { 1171 .pm = SND_VIA82XX_PM_OPS, 1172 }, 1173 }; 1174 1175 module_pci_driver(via82xx_modem_driver); 1176