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via82xx_modem.c
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linux-6.19.14/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 38MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>"); 39MODULE_DESCRIPTION("VIA VT82xx modem"); 40MODULE_LICENSE("GPL"); 41 42static int index = -2; /* Exclude the first card */ 43static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */ 44static int ac97_clock = 48000; 45 46module_param(index, int, 0444); 47MODULE_PARM_DESC(index, "Index value for VIA 82xx bridge."); 48module_param(id, charp, 0444); 49MODULE_PARM_DESC(id, "ID string for VIA 82xx bridge."); 50module_param(ac97_clock, int, 0444); 51MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz)."); 52 53/* just for backward compatibility */ 54static bool enable; 55module_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) \ 100enum {\ 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 */ 111DEFINE_VIA_REGSET(MO, 0x40); 112DEFINE_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 197struct snd_via_sg_table { 198 unsigned int offset; 199 unsigned int size; 200} ; 201 202#define VIA_TABLE_SIZE 255 203 204struct 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 219enum { TYPE_CARD_VIA82XX_MODEM = 1 }; 220 221#define VIA_MAX_MODEM_DEVS 2 222 223struct 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 248static const struct pci_device_id snd_via82xx_modem_ids[] = { 249 { PCI_VDEVICE(VIA, 0x3068), TYPE_CARD_VIA82XX_MODEM, }, 250 { 0, } 251}; 252 253MODULE_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 */ 263static 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 339static 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 355static inline unsigned int snd_via82xx_codec_xread(struct via82xx_modem *chip) 356{ 357 return inl(VIAREG(chip, AC97)); 358} 359 360static inline void snd_via82xx_codec_xwrite(struct via82xx_modem *chip, unsigned int val) 361{ 362 outl(val, VIAREG(chip, AC97)); 363} 364 365static 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 381static 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 398static 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 407static 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 425static 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 453static 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 473static 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 guard(spinlock)(&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 return IRQ_HANDLED; 501} 502 503/* 504 * PCM callbacks 505 */ 506 507/* 508 * trigger callback 509 */ 510static int snd_via82xx_pcm_trigger(struct snd_pcm_substream *substream, int cmd) 511{ 512 struct via82xx_modem *chip = snd_pcm_substream_chip(substream); 513 struct viadev *viadev = substream->runtime->private_data; 514 unsigned char val = 0; 515 516 switch (cmd) { 517 case SNDRV_PCM_TRIGGER_START: 518 case SNDRV_PCM_TRIGGER_SUSPEND: 519 val |= VIA_REG_CTRL_START; 520 viadev->running = 1; 521 break; 522 case SNDRV_PCM_TRIGGER_STOP: 523 val = VIA_REG_CTRL_TERMINATE; 524 viadev->running = 0; 525 break; 526 case SNDRV_PCM_TRIGGER_PAUSE_PUSH: 527 val |= VIA_REG_CTRL_PAUSE; 528 viadev->running = 0; 529 break; 530 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: 531 viadev->running = 1; 532 break; 533 default: 534 return -EINVAL; 535 } 536 outb(val, VIADEV_REG(viadev, OFFSET_CONTROL)); 537 if (cmd == SNDRV_PCM_TRIGGER_STOP) 538 snd_via82xx_channel_reset(chip, viadev); 539 return 0; 540} 541 542/* 543 * pointer callbacks 544 */ 545 546/* 547 * calculate the linear position at the given sg-buffer index and the rest count 548 */ 549 550#define check_invalid_pos(viadev,pos) \ 551 ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 ||\ 552 viadev->lastpos < viadev->bufsize2)) 553 554static inline unsigned int calc_linear_pos(struct via82xx_modem *chip, 555 struct viadev *viadev, 556 unsigned int idx, 557 unsigned int count) 558{ 559 unsigned int size, res; 560 561 size = viadev->idx_table[idx].size; 562 res = viadev->idx_table[idx].offset + size - count; 563 564 /* check the validity of the calculated position */ 565 if (size < count) { 566 dev_err(chip->card->dev, 567 "invalid via82xx_cur_ptr (size = %d, count = %d)\n", 568 (int)size, (int)count); 569 res = viadev->lastpos; 570 } else if (check_invalid_pos(viadev, res)) { 571#ifdef POINTER_DEBUG 572 dev_dbg(chip->card->dev, 573 "fail: idx = %i/%i, lastpos = 0x%x, bufsize2 = 0x%x, offsize = 0x%x, size = 0x%x, count = 0x%x\n", 574 idx, viadev->tbl_entries, viadev->lastpos, 575 viadev->bufsize2, viadev->idx_table[idx].offset, 576 viadev->idx_table[idx].size, count); 577#endif 578 if (count && size < count) { 579 dev_dbg(chip->card->dev, 580 "invalid via82xx_cur_ptr, using last valid pointer\n"); 581 res = viadev->lastpos; 582 } else { 583 if (! count) 584 /* bogus count 0 on the DMA boundary? */ 585 res = viadev->idx_table[idx].offset; 586 else 587 /* count register returns full size 588 * when end of buffer is reached 589 */ 590 res = viadev->idx_table[idx].offset + size; 591 if (check_invalid_pos(viadev, res)) { 592 dev_dbg(chip->card->dev, 593 "invalid via82xx_cur_ptr (2), using last valid pointer\n"); 594 res = viadev->lastpos; 595 } 596 } 597 } 598 viadev->lastpos = res; /* remember the last position */ 599 if (res >= viadev->bufsize) 600 res -= viadev->bufsize; 601 return res; 602} 603 604/* 605 * get the current pointer on via686 606 */ 607static snd_pcm_uframes_t snd_via686_pcm_pointer(struct snd_pcm_substream *substream) 608{ 609 struct via82xx_modem *chip = snd_pcm_substream_chip(substream); 610 struct viadev *viadev = substream->runtime->private_data; 611 unsigned int idx, ptr, count, res; 612 613 if (snd_BUG_ON(!viadev->tbl_entries)) 614 return 0; 615 if (!(inb(VIADEV_REG(viadev, OFFSET_STATUS)) & VIA_REG_STAT_ACTIVE)) 616 return 0; 617 618 guard(spinlock)(&chip->reg_lock); 619 count = inl(VIADEV_REG(viadev, OFFSET_CURR_COUNT)) & 0xffffff; 620 /* The via686a does not have the current index register, 621 * so we need to calculate the index from CURR_PTR. 622 */ 623 ptr = inl(VIADEV_REG(viadev, OFFSET_CURR_PTR)); 624 if (ptr <= (unsigned int)viadev->table.addr) 625 idx = 0; 626 else /* CURR_PTR holds the address + 8 */ 627 idx = ((ptr - (unsigned int)viadev->table.addr) / 8 - 1) % 628 viadev->tbl_entries; 629 res = calc_linear_pos(chip, viadev, idx, count); 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 */ 638static 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 = build_via_table(viadev, substream, chip->pci, 646 params_periods(hw_params), 647 params_period_bytes(hw_params)); 648 if (err < 0) 649 return err; 650 651 snd_ac97_write(chip->ac97, AC97_LINE1_RATE, params_rate(hw_params)); 652 snd_ac97_write(chip->ac97, AC97_LINE1_LEVEL, 0); 653 654 return 0; 655} 656 657/* 658 * hw_free callback: 659 * clean up the buffer description table and release the buffer 660 */ 661static int snd_via82xx_hw_free(struct snd_pcm_substream *substream) 662{ 663 struct via82xx_modem *chip = snd_pcm_substream_chip(substream); 664 struct viadev *viadev = substream->runtime->private_data; 665 666 clean_via_table(viadev, substream, chip->pci); 667 return 0; 668} 669 670 671/* 672 * set up the table pointer 673 */ 674static void snd_via82xx_set_table_ptr(struct via82xx_modem *chip, struct viadev *viadev) 675{ 676 snd_via82xx_codec_ready(chip, chip->ac97_secondary); 677 outl((u32)viadev->table.addr, VIADEV_REG(viadev, OFFSET_TABLE_PTR)); 678 udelay(20); 679 snd_via82xx_codec_ready(chip, chip->ac97_secondary); 680} 681 682/* 683 * prepare callback for playback and capture 684 */ 685static int snd_via82xx_pcm_prepare(struct snd_pcm_substream *substream) 686{ 687 struct via82xx_modem *chip = snd_pcm_substream_chip(substream); 688 struct viadev *viadev = substream->runtime->private_data; 689 690 snd_via82xx_channel_reset(chip, viadev); 691 /* this must be set after channel_reset */ 692 snd_via82xx_set_table_ptr(chip, viadev); 693 outb(VIA_REG_TYPE_AUTOSTART|VIA_REG_TYPE_INT_EOL|VIA_REG_TYPE_INT_FLAG, 694 VIADEV_REG(viadev, OFFSET_TYPE)); 695 return 0; 696} 697 698/* 699 * pcm hardware definition, identical for both playback and capture 700 */ 701static const struct snd_pcm_hardware snd_via82xx_hw = 702{ 703 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED | 704 SNDRV_PCM_INFO_BLOCK_TRANSFER | 705 SNDRV_PCM_INFO_MMAP_VALID | 706 /* SNDRV_PCM_INFO_RESUME | */ 707 SNDRV_PCM_INFO_PAUSE), 708 .formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE, 709 .rates = SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_KNOT, 710 .rate_min = 8000, 711 .rate_max = 16000, 712 .channels_min = 1, 713 .channels_max = 1, 714 .buffer_bytes_max = 128 * 1024, 715 .period_bytes_min = 32, 716 .period_bytes_max = 128 * 1024, 717 .periods_min = 2, 718 .periods_max = VIA_TABLE_SIZE / 2, 719 .fifo_size = 0, 720}; 721 722 723/* 724 * open callback skeleton 725 */ 726static int snd_via82xx_modem_pcm_open(struct via82xx_modem *chip, struct viadev *viadev, 727 struct snd_pcm_substream *substream) 728{ 729 struct snd_pcm_runtime *runtime = substream->runtime; 730 int err; 731 static const unsigned int rates[] = { 8000, 9600, 12000, 16000 }; 732 static const struct snd_pcm_hw_constraint_list hw_constraints_rates = { 733 .count = ARRAY_SIZE(rates), 734 .list = rates, 735 .mask = 0, 736 }; 737 738 runtime->hw = snd_via82xx_hw; 739 740 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE, 741 &hw_constraints_rates); 742 if (err < 0) 743 return err; 744 745 /* we may remove following constaint when we modify table entries 746 in interrupt */ 747 err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); 748 if (err < 0) 749 return err; 750 751 runtime->private_data = viadev; 752 viadev->substream = substream; 753 754 return 0; 755} 756 757 758/* 759 * open callback for playback 760 */ 761static int snd_via82xx_playback_open(struct snd_pcm_substream *substream) 762{ 763 struct via82xx_modem *chip = snd_pcm_substream_chip(substream); 764 struct viadev *viadev = &chip->devs[chip->playback_devno + substream->number]; 765 766 return snd_via82xx_modem_pcm_open(chip, viadev, substream); 767} 768 769/* 770 * open callback for capture 771 */ 772static int snd_via82xx_capture_open(struct snd_pcm_substream *substream) 773{ 774 struct via82xx_modem *chip = snd_pcm_substream_chip(substream); 775 struct viadev *viadev = &chip->devs[chip->capture_devno + substream->pcm->device]; 776 777 return snd_via82xx_modem_pcm_open(chip, viadev, substream); 778} 779 780/* 781 * close callback 782 */ 783static int snd_via82xx_pcm_close(struct snd_pcm_substream *substream) 784{ 785 struct viadev *viadev = substream->runtime->private_data; 786 787 viadev->substream = NULL; 788 return 0; 789} 790 791 792/* via686 playback callbacks */ 793static const struct snd_pcm_ops snd_via686_playback_ops = { 794 .open = snd_via82xx_playback_open, 795 .close = snd_via82xx_pcm_close, 796 .hw_params = snd_via82xx_hw_params, 797 .hw_free = snd_via82xx_hw_free, 798 .prepare = snd_via82xx_pcm_prepare, 799 .trigger = snd_via82xx_pcm_trigger, 800 .pointer = snd_via686_pcm_pointer, 801}; 802 803/* via686 capture callbacks */ 804static const struct snd_pcm_ops snd_via686_capture_ops = { 805 .open = snd_via82xx_capture_open, 806 .close = snd_via82xx_pcm_close, 807 .hw_params = snd_via82xx_hw_params, 808 .hw_free = snd_via82xx_hw_free, 809 .prepare = snd_via82xx_pcm_prepare, 810 .trigger = snd_via82xx_pcm_trigger, 811 .pointer = snd_via686_pcm_pointer, 812}; 813 814 815static void init_viadev(struct via82xx_modem *chip, int idx, unsigned int reg_offset, 816 int direction) 817{ 818 chip->devs[idx].reg_offset = reg_offset; 819 chip->devs[idx].direction = direction; 820 chip->devs[idx].port = chip->port + reg_offset; 821} 822 823/* 824 * create a pcm instance for via686a/b 825 */ 826static int snd_via686_pcm_new(struct via82xx_modem *chip) 827{ 828 struct snd_pcm *pcm; 829 int err; 830 831 chip->playback_devno = 0; 832 chip->capture_devno = 1; 833 chip->num_devs = 2; 834 chip->intr_mask = 0x330000; /* FLAGS | EOL for MR, MW */ 835 836 err = snd_pcm_new(chip->card, chip->card->shortname, 0, 1, 1, &pcm); 837 if (err < 0) 838 return err; 839 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_via686_playback_ops); 840 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_via686_capture_ops); 841 pcm->dev_class = SNDRV_PCM_CLASS_MODEM; 842 pcm->private_data = chip; 843 strscpy(pcm->name, chip->card->shortname); 844 chip->pcms[0] = pcm; 845 init_viadev(chip, 0, VIA_REG_MO_STATUS, 0); 846 init_viadev(chip, 1, VIA_REG_MI_STATUS, 1); 847 848 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV_SG, 849 &chip->pci->dev, 64*1024, 128*1024); 850 return 0; 851} 852 853 854/* 855 * Mixer part 856 */ 857 858 859static void snd_via82xx_mixer_free_ac97_bus(struct snd_ac97_bus *bus) 860{ 861 struct via82xx_modem *chip = bus->private_data; 862 chip->ac97_bus = NULL; 863} 864 865static void snd_via82xx_mixer_free_ac97(struct snd_ac97 *ac97) 866{ 867 struct via82xx_modem *chip = ac97->private_data; 868 chip->ac97 = NULL; 869} 870 871 872static int snd_via82xx_mixer_new(struct via82xx_modem *chip) 873{ 874 struct snd_ac97_template ac97; 875 int err; 876 static const struct snd_ac97_bus_ops ops = { 877 .write = snd_via82xx_codec_write, 878 .read = snd_via82xx_codec_read, 879 .wait = snd_via82xx_codec_wait, 880 }; 881 882 err = snd_ac97_bus(chip->card, 0, &ops, chip, &chip->ac97_bus); 883 if (err < 0) 884 return err; 885 chip->ac97_bus->private_free = snd_via82xx_mixer_free_ac97_bus; 886 chip->ac97_bus->clock = chip->ac97_clock; 887 888 memset(&ac97, 0, sizeof(ac97)); 889 ac97.private_data = chip; 890 ac97.private_free = snd_via82xx_mixer_free_ac97; 891 ac97.pci = chip->pci; 892 ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE; 893 ac97.num = chip->ac97_secondary; 894 895 err = snd_ac97_mixer(chip->ac97_bus, &ac97, &chip->ac97); 896 if (err < 0) 897 return err; 898 899 return 0; 900} 901 902 903/* 904 * proc interface 905 */ 906static void snd_via82xx_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer) 907{ 908 struct via82xx_modem *chip = entry->private_data; 909 int i; 910 911 snd_iprintf(buffer, "%s\n\n", chip->card->longname); 912 for (i = 0; i < 0xa0; i += 4) { 913 snd_iprintf(buffer, "%02x: %08x\n", i, inl(chip->port + i)); 914 } 915} 916 917static void snd_via82xx_proc_init(struct via82xx_modem *chip) 918{ 919 snd_card_ro_proc_new(chip->card, "via82xx", chip, 920 snd_via82xx_proc_read); 921} 922 923/* 924 * 925 */ 926 927static int snd_via82xx_chip_init(struct via82xx_modem *chip) 928{ 929 unsigned int val; 930 unsigned long end_time; 931 unsigned char pval; 932 933 pci_read_config_byte(chip->pci, VIA_MC97_CTRL, &pval); 934 if((pval & VIA_MC97_CTRL_INIT) != VIA_MC97_CTRL_INIT) { 935 pci_write_config_byte(chip->pci, 0x44, pval|VIA_MC97_CTRL_INIT); 936 udelay(100); 937 } 938 939 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval); 940 if (! (pval & VIA_ACLINK_C00_READY)) { /* codec not ready? */ 941 /* deassert ACLink reset, force SYNC */ 942 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 943 VIA_ACLINK_CTRL_ENABLE | 944 VIA_ACLINK_CTRL_RESET | 945 VIA_ACLINK_CTRL_SYNC); 946 udelay(100); 947#if 1 /* FIXME: should we do full reset here for all chip models? */ 948 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 0x00); 949 udelay(100); 950#else 951 /* deassert ACLink reset, force SYNC (warm AC'97 reset) */ 952 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, 953 VIA_ACLINK_CTRL_RESET|VIA_ACLINK_CTRL_SYNC); 954 udelay(2); 955#endif 956 /* ACLink on, deassert ACLink reset, VSR, SGD data out */ 957 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT); 958 udelay(100); 959 } 960 961 pci_read_config_byte(chip->pci, VIA_ACLINK_CTRL, &pval); 962 if ((pval & VIA_ACLINK_CTRL_INIT) != VIA_ACLINK_CTRL_INIT) { 963 /* ACLink on, deassert ACLink reset, VSR, SGD data out */ 964 pci_write_config_byte(chip->pci, VIA_ACLINK_CTRL, VIA_ACLINK_CTRL_INIT); 965 udelay(100); 966 } 967 968 /* wait until codec ready */ 969 end_time = jiffies + msecs_to_jiffies(750); 970 do { 971 pci_read_config_byte(chip->pci, VIA_ACLINK_STAT, &pval); 972 if (pval & VIA_ACLINK_C00_READY) /* primary codec ready */ 973 break; 974 schedule_timeout_uninterruptible(1); 975 } while (time_before(jiffies, end_time)); 976 977 val = snd_via82xx_codec_xread(chip); 978 if (val & VIA_REG_AC97_BUSY) 979 dev_err(chip->card->dev, 980 "AC'97 codec is not ready [0x%x]\n", val); 981 982 snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ | 983 VIA_REG_AC97_SECONDARY_VALID | 984 (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT)); 985 end_time = jiffies + msecs_to_jiffies(750); 986 snd_via82xx_codec_xwrite(chip, VIA_REG_AC97_READ | 987 VIA_REG_AC97_SECONDARY_VALID | 988 (VIA_REG_AC97_CODEC_ID_SECONDARY << VIA_REG_AC97_CODEC_ID_SHIFT)); 989 do { 990 val = snd_via82xx_codec_xread(chip); 991 if (val & VIA_REG_AC97_SECONDARY_VALID) { 992 chip->ac97_secondary = 1; 993 goto __ac97_ok2; 994 } 995 schedule_timeout_uninterruptible(1); 996 } while (time_before(jiffies, end_time)); 997 /* This is ok, the most of motherboards have only one codec */ 998 999 __ac97_ok2: 1000 1001 /* route FM trap to IRQ, disable FM trap */ 1002 // pci_write_config_byte(chip->pci, VIA_FM_NMI_CTRL, 0); 1003 /* disable all GPI interrupts */ 1004 outl(0, VIAREG(chip, GPI_INTR)); 1005 1006 return 0; 1007} 1008 1009/* 1010 * power management 1011 */ 1012static int snd_via82xx_suspend(struct device *dev) 1013{ 1014 struct snd_card *card = dev_get_drvdata(dev); 1015 struct via82xx_modem *chip = card->private_data; 1016 int i; 1017 1018 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot); 1019 for (i = 0; i < chip->num_devs; i++) 1020 snd_via82xx_channel_reset(chip, &chip->devs[i]); 1021 snd_ac97_suspend(chip->ac97); 1022 return 0; 1023} 1024 1025static int snd_via82xx_resume(struct device *dev) 1026{ 1027 struct snd_card *card = dev_get_drvdata(dev); 1028 struct via82xx_modem *chip = card->private_data; 1029 int i; 1030 1031 snd_via82xx_chip_init(chip); 1032 1033 snd_ac97_resume(chip->ac97); 1034 1035 for (i = 0; i < chip->num_devs; i++) 1036 snd_via82xx_channel_reset(chip, &chip->devs[i]); 1037 1038 snd_power_change_state(card, SNDRV_CTL_POWER_D0); 1039 return 0; 1040} 1041 1042static DEFINE_SIMPLE_DEV_PM_OPS(snd_via82xx_pm, snd_via82xx_suspend, snd_via82xx_resume); 1043 1044static void snd_via82xx_free(struct snd_card *card) 1045{ 1046 struct via82xx_modem *chip = card->private_data; 1047 unsigned int i; 1048 1049 /* disable interrupts */ 1050 for (i = 0; i < chip->num_devs; i++) 1051 snd_via82xx_channel_reset(chip, &chip->devs[i]); 1052} 1053 1054static int snd_via82xx_create(struct snd_card *card, 1055 struct pci_dev *pci, 1056 int chip_type, 1057 int revision, 1058 unsigned int ac97_clock) 1059{ 1060 struct via82xx_modem *chip = card->private_data; 1061 int err; 1062 1063 err = pcim_enable_device(pci); 1064 if (err < 0) 1065 return err; 1066 1067 spin_lock_init(&chip->reg_lock); 1068 chip->card = card; 1069 chip->pci = pci; 1070 chip->irq = -1; 1071 1072 err = pcim_request_all_regions(pci, card->driver); 1073 if (err < 0) 1074 return err; 1075 chip->port = pci_resource_start(pci, 0); 1076 if (devm_request_irq(&pci->dev, pci->irq, snd_via82xx_interrupt, 1077 IRQF_SHARED, KBUILD_MODNAME, chip)) { 1078 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq); 1079 return -EBUSY; 1080 } 1081 chip->irq = pci->irq; 1082 card->sync_irq = chip->irq; 1083 card->private_free = snd_via82xx_free; 1084 if (ac97_clock >= 8000 && ac97_clock <= 48000) 1085 chip->ac97_clock = ac97_clock; 1086 1087 err = snd_via82xx_chip_init(chip); 1088 if (err < 0) 1089 return err; 1090 1091 /* The 8233 ac97 controller does not implement the master bit 1092 * in the pci command register. IMHO this is a violation of the PCI spec. 1093 * We call pci_set_master here because it does not hurt. */ 1094 pci_set_master(pci); 1095 return 0; 1096} 1097 1098 1099static int __snd_via82xx_probe(struct pci_dev *pci, 1100 const struct pci_device_id *pci_id) 1101{ 1102 struct snd_card *card; 1103 struct via82xx_modem *chip; 1104 int chip_type = 0, card_type; 1105 unsigned int i; 1106 int err; 1107 1108 err = snd_devm_card_new(&pci->dev, index, id, THIS_MODULE, 1109 sizeof(*chip), &card); 1110 if (err < 0) 1111 return err; 1112 chip = card->private_data; 1113 1114 card_type = pci_id->driver_data; 1115 switch (card_type) { 1116 case TYPE_CARD_VIA82XX_MODEM: 1117 strscpy(card->driver, "VIA82XX-MODEM"); 1118 sprintf(card->shortname, "VIA 82XX modem"); 1119 break; 1120 default: 1121 dev_err(card->dev, "invalid card type %d\n", card_type); 1122 return -EINVAL; 1123 } 1124 1125 err = snd_via82xx_create(card, pci, chip_type, pci->revision, 1126 ac97_clock); 1127 if (err < 0) 1128 return err; 1129 err = snd_via82xx_mixer_new(chip); 1130 if (err < 0) 1131 return err; 1132 1133 err = snd_via686_pcm_new(chip); 1134 if (err < 0) 1135 return err; 1136 1137 /* disable interrupts */ 1138 for (i = 0; i < chip->num_devs; i++) 1139 snd_via82xx_channel_reset(chip, &chip->devs[i]); 1140 1141 sprintf(card->longname, "%s at 0x%lx, irq %d", 1142 card->shortname, chip->port, chip->irq); 1143 1144 snd_via82xx_proc_init(chip); 1145 1146 err = snd_card_register(card); 1147 if (err < 0) 1148 return err; 1149 pci_set_drvdata(pci, card); 1150 return 0; 1151} 1152 1153static int snd_via82xx_probe(struct pci_dev *pci, 1154 const struct pci_device_id *pci_id) 1155{ 1156 return snd_card_free_on_error(&pci->dev, __snd_via82xx_probe(pci, pci_id)); 1157} 1158 1159static struct pci_driver via82xx_modem_driver = { 1160 .name = KBUILD_MODNAME, 1161 .id_table = snd_via82xx_modem_ids, 1162 .probe = snd_via82xx_probe, 1163 .driver = { 1164 .pm = &snd_via82xx_pm, 1165 }, 1166}; 1167 1168module_pci_driver(via82xx_modem_driver);
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