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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * ALSA modem driver for VIA VT82xx (South Bridge)4 *5 * VT82C686A/B/C, VT8233A/C, VT82356 *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 AC9717 * 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 035#define POINTER_DEBUG36#endif37 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 registers60 */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 0x2077#define VIA_REG_CTRL_PAUSE 0x08 /* RW */78#define VIA_REG_CTRL_INT_STOP 0x04 79#define VIA_REG_CTRL_INT_EOL 0x0280#define VIA_REG_CTRL_INT_FLAG 0x0181#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 0x0088#define VIA_REG_TYPE_INT_LSAMPLE 0x0489#define VIA_REG_TYPE_INT_LESSONE 0x0890#define VIA_REG_TYPE_INT_MASK 0x0c91#define VIA_REG_TYPE_INT_EOL 0x0292#define VIA_REG_TYPE_INT_FLAG 0x0193#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 30118#define VIA_REG_AC97_CODEC_ID_PRIMARY 0x00119#define VIA_REG_AC97_CODEC_ID_SECONDARY 0x01120#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 16125#define VIA_REG_AC97_CMD_MASK 0x7e126#define VIA_REG_AC97_DATA_SHIFT 0127#define VIA_REG_AC97_DATA_MASK 0xffff128 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 0x88152#define VIA_REG_GPI_INTR 0x8c153 154#define VIA_TBL_BIT_FLAG 0x40000000155#define VIA_TBL_BIT_EOL 0x80000000156 157/* pci space */158#define VIA_ACLINK_STAT 0x40159#define VIA_ACLINK_C11_READY 0x20160#define VIA_ACLINK_C10_READY 0x10161#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 0x41165#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 0x42177#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 0x20180#define VIA_FUNC_SB_FIFO_EMPTY 0x10181#define VIA_FUNC_ENABLE_GAME 0x08182#define VIA_FUNC_ENABLE_FM 0x04183#define VIA_FUNC_ENABLE_MIDI 0x02184#define VIA_FUNC_ENABLE_SB 0x01185#define VIA_PNP_CONTROL 0x43186#define VIA_MC97_CTRL 0x44187#define VIA_MC97_CTRL_ENABLE 0x80188#define VIA_MC97_CTRL_SECONDARY 0x40189#define VIA_MC97_CTRL_INIT (VIA_MC97_CTRL_ENABLE|\190 VIA_MC97_CTRL_SECONDARY)191 192 193/*194 * pcm stream195 */196 197struct snd_via_sg_table {198 unsigned int offset;199 unsigned int size;200} ;201 202#define VIA_TABLE_SIZE 255203 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 2222 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 buffers260 * periods = number of periods261 * fragsize = period size in bytes262 */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 care274 */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's296 * 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 else317 flag = VIA_TBL_BIT_FLAG; /* period boundary */318 } else319 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/O353 */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 handler471 */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 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 callbacks506 */507 508/*509 * trigger callback510 */511static 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 callbacks545 */546 547/*548 * calculate the linear position at the given sg-buffer index and the rest count549 */550 551#define check_invalid_pos(viadev,pos) \552 ((pos) < viadev->lastpos && ((pos) >= viadev->bufsize2 ||\553 viadev->lastpos < viadev->bufsize2))554 555static 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_DEBUG573 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#endif579 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 else588 /* count register returns full size589 * when end of buffer is reached590 */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 via686607 */608static 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 table639 */640static 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 buffer662 */663static 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 pointer675 */676static 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 capture686 */687static 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 capture702 */703static 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 skeleton727 */728static 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 entries748 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 playback762 */763static 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 capture773 */774static 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 callback784 */785static 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 */795static 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 */806static 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 817static 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/b827 */828static 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 part858 */859 860 861static 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 867static 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 874static 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 interface907 */908static 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 919static 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 929static 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#else953 /* 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#endif958 /* 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/*1012 * power management1013 */1014static int snd_via82xx_suspend(struct device *dev)1015{1016 struct snd_card *card = dev_get_drvdata(dev);1017 struct via82xx_modem *chip = card->private_data;1018 int i;1019 1020 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);1021 for (i = 0; i < chip->num_devs; i++)1022 snd_via82xx_channel_reset(chip, &chip->devs[i]);1023 snd_ac97_suspend(chip->ac97);1024 return 0;1025}1026 1027static int snd_via82xx_resume(struct device *dev)1028{1029 struct snd_card *card = dev_get_drvdata(dev);1030 struct via82xx_modem *chip = card->private_data;1031 int i;1032 1033 snd_via82xx_chip_init(chip);1034 1035 snd_ac97_resume(chip->ac97);1036 1037 for (i = 0; i < chip->num_devs; i++)1038 snd_via82xx_channel_reset(chip, &chip->devs[i]);1039 1040 snd_power_change_state(card, SNDRV_CTL_POWER_D0);1041 return 0;1042}1043 1044static DEFINE_SIMPLE_DEV_PM_OPS(snd_via82xx_pm, snd_via82xx_suspend, snd_via82xx_resume);1045 1046static void snd_via82xx_free(struct snd_card *card)1047{1048 struct via82xx_modem *chip = card->private_data;1049 unsigned int i;1050 1051 /* disable interrupts */1052 for (i = 0; i < chip->num_devs; i++)1053 snd_via82xx_channel_reset(chip, &chip->devs[i]);1054}1055 1056static int snd_via82xx_create(struct snd_card *card,1057 struct pci_dev *pci,1058 int chip_type,1059 int revision,1060 unsigned int ac97_clock)1061{1062 struct via82xx_modem *chip = card->private_data;1063 int err;1064 1065 err = pcim_enable_device(pci);1066 if (err < 0)1067 return err;1068 1069 spin_lock_init(&chip->reg_lock);1070 chip->card = card;1071 chip->pci = pci;1072 chip->irq = -1;1073 1074 err = pci_request_regions(pci, card->driver);1075 if (err < 0)1076 return err;1077 chip->port = pci_resource_start(pci, 0);1078 if (devm_request_irq(&pci->dev, pci->irq, snd_via82xx_interrupt,1079 IRQF_SHARED, KBUILD_MODNAME, chip)) {1080 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);1081 return -EBUSY;1082 }1083 chip->irq = pci->irq;1084 card->sync_irq = chip->irq;1085 card->private_free = snd_via82xx_free;1086 if (ac97_clock >= 8000 && ac97_clock <= 48000)1087 chip->ac97_clock = ac97_clock;1088 1089 err = snd_via82xx_chip_init(chip);1090 if (err < 0)1091 return err;1092 1093 /* The 8233 ac97 controller does not implement the master bit1094 * in the pci command register. IMHO this is a violation of the PCI spec.1095 * We call pci_set_master here because it does not hurt. */1096 pci_set_master(pci);1097 return 0;1098}1099 1100 1101static int __snd_via82xx_probe(struct pci_dev *pci,1102 const struct pci_device_id *pci_id)1103{1104 struct snd_card *card;1105 struct via82xx_modem *chip;1106 int chip_type = 0, card_type;1107 unsigned int i;1108 int err;1109 1110 err = snd_devm_card_new(&pci->dev, index, id, THIS_MODULE,1111 sizeof(*chip), &card);1112 if (err < 0)1113 return err;1114 chip = card->private_data;1115 1116 card_type = pci_id->driver_data;1117 switch (card_type) {1118 case TYPE_CARD_VIA82XX_MODEM:1119 strcpy(card->driver, "VIA82XX-MODEM");1120 sprintf(card->shortname, "VIA 82XX modem");1121 break;1122 default:1123 dev_err(card->dev, "invalid card type %d\n", card_type);1124 return -EINVAL;1125 }1126 1127 err = snd_via82xx_create(card, pci, chip_type, pci->revision,1128 ac97_clock);1129 if (err < 0)1130 return err;1131 err = snd_via82xx_mixer_new(chip);1132 if (err < 0)1133 return err;1134 1135 err = snd_via686_pcm_new(chip);1136 if (err < 0)1137 return err;1138 1139 /* disable interrupts */1140 for (i = 0; i < chip->num_devs; i++)1141 snd_via82xx_channel_reset(chip, &chip->devs[i]);1142 1143 sprintf(card->longname, "%s at 0x%lx, irq %d",1144 card->shortname, chip->port, chip->irq);1145 1146 snd_via82xx_proc_init(chip);1147 1148 err = snd_card_register(card);1149 if (err < 0)1150 return err;1151 pci_set_drvdata(pci, card);1152 return 0;1153}1154 1155static int snd_via82xx_probe(struct pci_dev *pci,1156 const struct pci_device_id *pci_id)1157{1158 return snd_card_free_on_error(&pci->dev, __snd_via82xx_probe(pci, pci_id));1159}1160 1161static struct pci_driver via82xx_modem_driver = {1162 .name = KBUILD_MODNAME,1163 .id_table = snd_via82xx_modem_ids,1164 .probe = snd_via82xx_probe,1165 .driver = {1166 .pm = &snd_via82xx_pm,1167 },1168};1169 1170module_pci_driver(via82xx_modem_driver);1171