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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * ALSA driver for ATI IXP 150/200/250 AC97 modem controllers4 *5 * Copyright (c) 2004 Takashi Iwai <tiwai@suse.de>6 */7 8#include <linux/io.h>9#include <linux/delay.h>10#include <linux/interrupt.h>11#include <linux/init.h>12#include <linux/pci.h>13#include <linux/slab.h>14#include <linux/module.h>15#include <linux/mutex.h>16#include <sound/core.h>17#include <sound/pcm.h>18#include <sound/pcm_params.h>19#include <sound/info.h>20#include <sound/ac97_codec.h>21#include <sound/initval.h>22 23MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");24MODULE_DESCRIPTION("ATI IXP MC97 controller");25MODULE_LICENSE("GPL");26 27static int index = -2; /* Exclude the first card */28static char *id = SNDRV_DEFAULT_STR1; /* ID for this card */29static int ac97_clock = 48000;30 31module_param(index, int, 0444);32MODULE_PARM_DESC(index, "Index value for ATI IXP controller.");33module_param(id, charp, 0444);34MODULE_PARM_DESC(id, "ID string for ATI IXP controller.");35module_param(ac97_clock, int, 0444);36MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");37 38/* just for backward compatibility */39static bool enable;40module_param(enable, bool, 0444);41 42 43/*44 */45 46#define ATI_REG_ISR 0x00 /* interrupt source */47#define ATI_REG_ISR_MODEM_IN_XRUN (1U<<0)48#define ATI_REG_ISR_MODEM_IN_STATUS (1U<<1)49#define ATI_REG_ISR_MODEM_OUT1_XRUN (1U<<2)50#define ATI_REG_ISR_MODEM_OUT1_STATUS (1U<<3)51#define ATI_REG_ISR_MODEM_OUT2_XRUN (1U<<4)52#define ATI_REG_ISR_MODEM_OUT2_STATUS (1U<<5)53#define ATI_REG_ISR_MODEM_OUT3_XRUN (1U<<6)54#define ATI_REG_ISR_MODEM_OUT3_STATUS (1U<<7)55#define ATI_REG_ISR_PHYS_INTR (1U<<8)56#define ATI_REG_ISR_PHYS_MISMATCH (1U<<9)57#define ATI_REG_ISR_CODEC0_NOT_READY (1U<<10)58#define ATI_REG_ISR_CODEC1_NOT_READY (1U<<11)59#define ATI_REG_ISR_CODEC2_NOT_READY (1U<<12)60#define ATI_REG_ISR_NEW_FRAME (1U<<13)61#define ATI_REG_ISR_MODEM_GPIO_DATA (1U<<14)62 63#define ATI_REG_IER 0x04 /* interrupt enable */64#define ATI_REG_IER_MODEM_IN_XRUN_EN (1U<<0)65#define ATI_REG_IER_MODEM_STATUS_EN (1U<<1)66#define ATI_REG_IER_MODEM_OUT1_XRUN_EN (1U<<2)67#define ATI_REG_IER_MODEM_OUT2_XRUN_EN (1U<<4)68#define ATI_REG_IER_MODEM_OUT3_XRUN_EN (1U<<6)69#define ATI_REG_IER_PHYS_INTR_EN (1U<<8)70#define ATI_REG_IER_PHYS_MISMATCH_EN (1U<<9)71#define ATI_REG_IER_CODEC0_INTR_EN (1U<<10)72#define ATI_REG_IER_CODEC1_INTR_EN (1U<<11)73#define ATI_REG_IER_CODEC2_INTR_EN (1U<<12)74#define ATI_REG_IER_NEW_FRAME_EN (1U<<13) /* (RO */75#define ATI_REG_IER_MODEM_GPIO_DATA_EN (1U<<14) /* (WO) modem is running */76#define ATI_REG_IER_MODEM_SET_BUS_BUSY (1U<<15)77 78#define ATI_REG_CMD 0x08 /* command */79#define ATI_REG_CMD_POWERDOWN (1U<<0)80#define ATI_REG_CMD_MODEM_RECEIVE_EN (1U<<1) /* modem only */81#define ATI_REG_CMD_MODEM_SEND1_EN (1U<<2) /* modem only */82#define ATI_REG_CMD_MODEM_SEND2_EN (1U<<3) /* modem only */83#define ATI_REG_CMD_MODEM_SEND3_EN (1U<<4) /* modem only */84#define ATI_REG_CMD_MODEM_STATUS_MEM (1U<<5) /* modem only */85#define ATI_REG_CMD_MODEM_IN_DMA_EN (1U<<8) /* modem only */86#define ATI_REG_CMD_MODEM_OUT_DMA1_EN (1U<<9) /* modem only */87#define ATI_REG_CMD_MODEM_OUT_DMA2_EN (1U<<10) /* modem only */88#define ATI_REG_CMD_MODEM_OUT_DMA3_EN (1U<<11) /* modem only */89#define ATI_REG_CMD_AUDIO_PRESENT (1U<<20)90#define ATI_REG_CMD_MODEM_GPIO_THRU_DMA (1U<<22) /* modem only */91#define ATI_REG_CMD_LOOPBACK_EN (1U<<23)92#define ATI_REG_CMD_PACKED_DIS (1U<<24)93#define ATI_REG_CMD_BURST_EN (1U<<25)94#define ATI_REG_CMD_PANIC_EN (1U<<26)95#define ATI_REG_CMD_MODEM_PRESENT (1U<<27)96#define ATI_REG_CMD_ACLINK_ACTIVE (1U<<28)97#define ATI_REG_CMD_AC_SOFT_RESET (1U<<29)98#define ATI_REG_CMD_AC_SYNC (1U<<30)99#define ATI_REG_CMD_AC_RESET (1U<<31)100 101#define ATI_REG_PHYS_OUT_ADDR 0x0c102#define ATI_REG_PHYS_OUT_CODEC_MASK (3U<<0)103#define ATI_REG_PHYS_OUT_RW (1U<<2)104#define ATI_REG_PHYS_OUT_ADDR_EN (1U<<8)105#define ATI_REG_PHYS_OUT_ADDR_SHIFT 9106#define ATI_REG_PHYS_OUT_DATA_SHIFT 16107 108#define ATI_REG_PHYS_IN_ADDR 0x10109#define ATI_REG_PHYS_IN_READ_FLAG (1U<<8)110#define ATI_REG_PHYS_IN_ADDR_SHIFT 9111#define ATI_REG_PHYS_IN_DATA_SHIFT 16112 113#define ATI_REG_SLOTREQ 0x14114 115#define ATI_REG_COUNTER 0x18116#define ATI_REG_COUNTER_SLOT (3U<<0) /* slot # */117#define ATI_REG_COUNTER_BITCLOCK (31U<<8)118 119#define ATI_REG_IN_FIFO_THRESHOLD 0x1c120 121#define ATI_REG_MODEM_IN_DMA_LINKPTR 0x20122#define ATI_REG_MODEM_IN_DMA_DT_START 0x24 /* RO */123#define ATI_REG_MODEM_IN_DMA_DT_NEXT 0x28 /* RO */124#define ATI_REG_MODEM_IN_DMA_DT_CUR 0x2c /* RO */125#define ATI_REG_MODEM_IN_DMA_DT_SIZE 0x30126#define ATI_REG_MODEM_OUT_FIFO 0x34 /* output threshold */127#define ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK (0xf<<16)128#define ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT 16129#define ATI_REG_MODEM_OUT_DMA1_LINKPTR 0x38130#define ATI_REG_MODEM_OUT_DMA2_LINKPTR 0x3c131#define ATI_REG_MODEM_OUT_DMA3_LINKPTR 0x40132#define ATI_REG_MODEM_OUT_DMA1_DT_START 0x44133#define ATI_REG_MODEM_OUT_DMA1_DT_NEXT 0x48134#define ATI_REG_MODEM_OUT_DMA1_DT_CUR 0x4c135#define ATI_REG_MODEM_OUT_DMA2_DT_START 0x50136#define ATI_REG_MODEM_OUT_DMA2_DT_NEXT 0x54137#define ATI_REG_MODEM_OUT_DMA2_DT_CUR 0x58138#define ATI_REG_MODEM_OUT_DMA3_DT_START 0x5c139#define ATI_REG_MODEM_OUT_DMA3_DT_NEXT 0x60140#define ATI_REG_MODEM_OUT_DMA3_DT_CUR 0x64141#define ATI_REG_MODEM_OUT_DMA12_DT_SIZE 0x68142#define ATI_REG_MODEM_OUT_DMA3_DT_SIZE 0x6c143#define ATI_REG_MODEM_OUT_FIFO_USED 0x70144#define ATI_REG_MODEM_OUT_GPIO 0x74145#define ATI_REG_MODEM_OUT_GPIO_EN 1146#define ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT 5147#define ATI_REG_MODEM_IN_GPIO 0x78148 149#define ATI_REG_MODEM_MIRROR 0x7c150#define ATI_REG_AUDIO_MIRROR 0x80151 152#define ATI_REG_MODEM_FIFO_FLUSH 0x88153#define ATI_REG_MODEM_FIFO_OUT1_FLUSH (1U<<0)154#define ATI_REG_MODEM_FIFO_OUT2_FLUSH (1U<<1)155#define ATI_REG_MODEM_FIFO_OUT3_FLUSH (1U<<2)156#define ATI_REG_MODEM_FIFO_IN_FLUSH (1U<<3)157 158/* LINKPTR */159#define ATI_REG_LINKPTR_EN (1U<<0)160 161#define ATI_MAX_DESCRIPTORS 256 /* max number of descriptor packets */162 163 164struct atiixp_modem;165 166/*167 * DMA packate descriptor168 */169 170struct atiixp_dma_desc {171 __le32 addr; /* DMA buffer address */172 u16 status; /* status bits */173 u16 size; /* size of the packet in dwords */174 __le32 next; /* address of the next packet descriptor */175};176 177/*178 * stream enum179 */180enum { ATI_DMA_PLAYBACK, ATI_DMA_CAPTURE, NUM_ATI_DMAS }; /* DMAs */181enum { ATI_PCM_OUT, ATI_PCM_IN, NUM_ATI_PCMS }; /* AC97 pcm slots */182enum { ATI_PCMDEV_ANALOG, NUM_ATI_PCMDEVS }; /* pcm devices */183 184#define NUM_ATI_CODECS 3185 186 187/*188 * constants and callbacks for each DMA type189 */190struct atiixp_dma_ops {191 int type; /* ATI_DMA_XXX */192 unsigned int llp_offset; /* LINKPTR offset */193 unsigned int dt_cur; /* DT_CUR offset */194 /* called from open callback */195 void (*enable_dma)(struct atiixp_modem *chip, int on);196 /* called from trigger (START/STOP) */197 void (*enable_transfer)(struct atiixp_modem *chip, int on);198 /* called from trigger (STOP only) */199 void (*flush_dma)(struct atiixp_modem *chip);200};201 202/*203 * DMA stream204 */205struct atiixp_dma {206 const struct atiixp_dma_ops *ops;207 struct snd_dma_buffer desc_buf;208 struct snd_pcm_substream *substream; /* assigned PCM substream */209 unsigned int buf_addr, buf_bytes; /* DMA buffer address, bytes */210 unsigned int period_bytes, periods;211 int opened;212 int running;213 int pcm_open_flag;214 int ac97_pcm_type; /* index # of ac97_pcm to access, -1 = not used */215};216 217/*218 * ATI IXP chip219 */220struct atiixp_modem {221 struct snd_card *card;222 struct pci_dev *pci;223 224 struct resource *res; /* memory i/o */225 unsigned long addr;226 void __iomem *remap_addr;227 int irq;228 229 struct snd_ac97_bus *ac97_bus;230 struct snd_ac97 *ac97[NUM_ATI_CODECS];231 232 spinlock_t reg_lock;233 234 struct atiixp_dma dmas[NUM_ATI_DMAS];235 struct ac97_pcm *pcms[NUM_ATI_PCMS];236 struct snd_pcm *pcmdevs[NUM_ATI_PCMDEVS];237 238 int max_channels; /* max. channels for PCM out */239 240 unsigned int codec_not_ready_bits; /* for codec detection */241 242 int spdif_over_aclink; /* passed from the module option */243 struct mutex open_mutex; /* playback open mutex */244};245 246 247/*248 */249static const struct pci_device_id snd_atiixp_ids[] = {250 { PCI_VDEVICE(ATI, 0x434d), 0 }, /* SB200 */251 { PCI_VDEVICE(ATI, 0x4378), 0 }, /* SB400 */252 { 0, }253};254 255MODULE_DEVICE_TABLE(pci, snd_atiixp_ids);256 257 258/*259 * lowlevel functions260 */261 262/*263 * update the bits of the given register.264 * return 1 if the bits changed.265 */266static int snd_atiixp_update_bits(struct atiixp_modem *chip, unsigned int reg,267 unsigned int mask, unsigned int value)268{269 void __iomem *addr = chip->remap_addr + reg;270 unsigned int data, old_data;271 old_data = data = readl(addr);272 data &= ~mask;273 data |= value;274 if (old_data == data)275 return 0;276 writel(data, addr);277 return 1;278}279 280/*281 * macros for easy use282 */283#define atiixp_write(chip,reg,value) \284 writel(value, chip->remap_addr + ATI_REG_##reg)285#define atiixp_read(chip,reg) \286 readl(chip->remap_addr + ATI_REG_##reg)287#define atiixp_update(chip,reg,mask,val) \288 snd_atiixp_update_bits(chip, ATI_REG_##reg, mask, val)289 290/*291 * handling DMA packets292 *293 * we allocate a linear buffer for the DMA, and split it to each packet.294 * in a future version, a scatter-gather buffer should be implemented.295 */296 297#define ATI_DESC_LIST_SIZE \298 PAGE_ALIGN(ATI_MAX_DESCRIPTORS * sizeof(struct atiixp_dma_desc))299 300/*301 * build packets ring for the given buffer size.302 *303 * IXP handles the buffer descriptors, which are connected as a linked304 * list. although we can change the list dynamically, in this version,305 * a static RING of buffer descriptors is used.306 *307 * the ring is built in this function, and is set up to the hardware. 308 */309static int atiixp_build_dma_packets(struct atiixp_modem *chip,310 struct atiixp_dma *dma,311 struct snd_pcm_substream *substream,312 unsigned int periods,313 unsigned int period_bytes)314{315 unsigned int i;316 u32 addr, desc_addr;317 unsigned long flags;318 319 if (periods > ATI_MAX_DESCRIPTORS)320 return -ENOMEM;321 322 if (dma->desc_buf.area == NULL) {323 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, &chip->pci->dev,324 ATI_DESC_LIST_SIZE, &dma->desc_buf) < 0)325 return -ENOMEM;326 dma->period_bytes = dma->periods = 0; /* clear */327 }328 329 if (dma->periods == periods && dma->period_bytes == period_bytes)330 return 0;331 332 /* reset DMA before changing the descriptor table */333 spin_lock_irqsave(&chip->reg_lock, flags);334 writel(0, chip->remap_addr + dma->ops->llp_offset);335 dma->ops->enable_dma(chip, 0);336 dma->ops->enable_dma(chip, 1);337 spin_unlock_irqrestore(&chip->reg_lock, flags);338 339 /* fill the entries */340 addr = (u32)substream->runtime->dma_addr;341 desc_addr = (u32)dma->desc_buf.addr;342 for (i = 0; i < periods; i++) {343 struct atiixp_dma_desc *desc;344 desc = &((struct atiixp_dma_desc *)dma->desc_buf.area)[i];345 desc->addr = cpu_to_le32(addr);346 desc->status = 0;347 desc->size = period_bytes >> 2; /* in dwords */348 desc_addr += sizeof(struct atiixp_dma_desc);349 if (i == periods - 1)350 desc->next = cpu_to_le32((u32)dma->desc_buf.addr);351 else352 desc->next = cpu_to_le32(desc_addr);353 addr += period_bytes;354 }355 356 writel((u32)dma->desc_buf.addr | ATI_REG_LINKPTR_EN,357 chip->remap_addr + dma->ops->llp_offset);358 359 dma->period_bytes = period_bytes;360 dma->periods = periods;361 362 return 0;363}364 365/*366 * remove the ring buffer and release it if assigned367 */368static void atiixp_clear_dma_packets(struct atiixp_modem *chip,369 struct atiixp_dma *dma,370 struct snd_pcm_substream *substream)371{372 if (dma->desc_buf.area) {373 writel(0, chip->remap_addr + dma->ops->llp_offset);374 snd_dma_free_pages(&dma->desc_buf);375 dma->desc_buf.area = NULL;376 }377}378 379/*380 * AC97 interface381 */382static int snd_atiixp_acquire_codec(struct atiixp_modem *chip)383{384 int timeout = 1000;385 386 while (atiixp_read(chip, PHYS_OUT_ADDR) & ATI_REG_PHYS_OUT_ADDR_EN) {387 if (! timeout--) {388 dev_warn(chip->card->dev, "codec acquire timeout\n");389 return -EBUSY;390 }391 udelay(1);392 }393 return 0;394}395 396static unsigned short snd_atiixp_codec_read(struct atiixp_modem *chip,397 unsigned short codec,398 unsigned short reg)399{400 unsigned int data;401 int timeout;402 403 if (snd_atiixp_acquire_codec(chip) < 0)404 return 0xffff;405 data = (reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) |406 ATI_REG_PHYS_OUT_ADDR_EN |407 ATI_REG_PHYS_OUT_RW |408 codec;409 atiixp_write(chip, PHYS_OUT_ADDR, data);410 if (snd_atiixp_acquire_codec(chip) < 0)411 return 0xffff;412 timeout = 1000;413 do {414 data = atiixp_read(chip, PHYS_IN_ADDR);415 if (data & ATI_REG_PHYS_IN_READ_FLAG)416 return data >> ATI_REG_PHYS_IN_DATA_SHIFT;417 udelay(1);418 } while (--timeout);419 /* time out may happen during reset */420 if (reg < 0x7c)421 dev_warn(chip->card->dev, "codec read timeout (reg %x)\n", reg);422 return 0xffff;423}424 425 426static void snd_atiixp_codec_write(struct atiixp_modem *chip,427 unsigned short codec,428 unsigned short reg, unsigned short val)429{430 unsigned int data;431 432 if (snd_atiixp_acquire_codec(chip) < 0)433 return;434 data = ((unsigned int)val << ATI_REG_PHYS_OUT_DATA_SHIFT) |435 ((unsigned int)reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) |436 ATI_REG_PHYS_OUT_ADDR_EN | codec;437 atiixp_write(chip, PHYS_OUT_ADDR, data);438}439 440 441static unsigned short snd_atiixp_ac97_read(struct snd_ac97 *ac97,442 unsigned short reg)443{444 struct atiixp_modem *chip = ac97->private_data;445 return snd_atiixp_codec_read(chip, ac97->num, reg);446 447}448 449static void snd_atiixp_ac97_write(struct snd_ac97 *ac97, unsigned short reg,450 unsigned short val)451{452 struct atiixp_modem *chip = ac97->private_data;453 if (reg == AC97_GPIO_STATUS) {454 atiixp_write(chip, MODEM_OUT_GPIO,455 (val << ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT) | ATI_REG_MODEM_OUT_GPIO_EN);456 return;457 }458 snd_atiixp_codec_write(chip, ac97->num, reg, val);459}460 461/*462 * reset AC link463 */464static int snd_atiixp_aclink_reset(struct atiixp_modem *chip)465{466 int timeout;467 468 /* reset powerdoewn */469 if (atiixp_update(chip, CMD, ATI_REG_CMD_POWERDOWN, 0))470 udelay(10);471 472 /* perform a software reset */473 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, ATI_REG_CMD_AC_SOFT_RESET);474 atiixp_read(chip, CMD);475 udelay(10);476 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, 0);477 478 timeout = 10;479 while (! (atiixp_read(chip, CMD) & ATI_REG_CMD_ACLINK_ACTIVE)) {480 /* do a hard reset */481 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET,482 ATI_REG_CMD_AC_SYNC);483 atiixp_read(chip, CMD);484 msleep(1);485 atiixp_update(chip, CMD, ATI_REG_CMD_AC_RESET, ATI_REG_CMD_AC_RESET);486 if (!--timeout) {487 dev_err(chip->card->dev, "codec reset timeout\n");488 break;489 }490 }491 492 /* deassert RESET and assert SYNC to make sure */493 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET,494 ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET);495 496 return 0;497}498 499static int snd_atiixp_aclink_down(struct atiixp_modem *chip)500{501 // if (atiixp_read(chip, MODEM_MIRROR) & 0x1) /* modem running, too? */502 // return -EBUSY;503 atiixp_update(chip, CMD,504 ATI_REG_CMD_POWERDOWN | ATI_REG_CMD_AC_RESET,505 ATI_REG_CMD_POWERDOWN);506 return 0;507}508 509/*510 * auto-detection of codecs511 *512 * the IXP chip can generate interrupts for the non-existing codecs.513 * NEW_FRAME interrupt is used to make sure that the interrupt is generated514 * even if all three codecs are connected.515 */516 517#define ALL_CODEC_NOT_READY \518 (ATI_REG_ISR_CODEC0_NOT_READY |\519 ATI_REG_ISR_CODEC1_NOT_READY |\520 ATI_REG_ISR_CODEC2_NOT_READY)521#define CODEC_CHECK_BITS (ALL_CODEC_NOT_READY|ATI_REG_ISR_NEW_FRAME)522 523static int snd_atiixp_codec_detect(struct atiixp_modem *chip)524{525 int timeout;526 527 chip->codec_not_ready_bits = 0;528 atiixp_write(chip, IER, CODEC_CHECK_BITS);529 /* wait for the interrupts */530 timeout = 50;531 while (timeout-- > 0) {532 msleep(1);533 if (chip->codec_not_ready_bits)534 break;535 }536 atiixp_write(chip, IER, 0); /* disable irqs */537 538 if ((chip->codec_not_ready_bits & ALL_CODEC_NOT_READY) == ALL_CODEC_NOT_READY) {539 dev_err(chip->card->dev, "no codec detected!\n");540 return -ENXIO;541 }542 return 0;543}544 545 546/*547 * enable DMA and irqs548 */549static int snd_atiixp_chip_start(struct atiixp_modem *chip)550{551 unsigned int reg;552 553 /* set up spdif, enable burst mode */554 reg = atiixp_read(chip, CMD);555 reg |= ATI_REG_CMD_BURST_EN;556 if(!(reg & ATI_REG_CMD_MODEM_PRESENT))557 reg |= ATI_REG_CMD_MODEM_PRESENT;558 atiixp_write(chip, CMD, reg);559 560 /* clear all interrupt source */561 atiixp_write(chip, ISR, 0xffffffff);562 /* enable irqs */563 atiixp_write(chip, IER,564 ATI_REG_IER_MODEM_STATUS_EN |565 ATI_REG_IER_MODEM_IN_XRUN_EN |566 ATI_REG_IER_MODEM_OUT1_XRUN_EN);567 return 0;568}569 570 571/*572 * disable DMA and IRQs573 */574static int snd_atiixp_chip_stop(struct atiixp_modem *chip)575{576 /* clear interrupt source */577 atiixp_write(chip, ISR, atiixp_read(chip, ISR));578 /* disable irqs */579 atiixp_write(chip, IER, 0);580 return 0;581}582 583 584/*585 * PCM section586 */587 588/*589 * pointer callback simplly reads XXX_DMA_DT_CUR register as the current590 * position. when SG-buffer is implemented, the offset must be calculated591 * correctly...592 */593static snd_pcm_uframes_t snd_atiixp_pcm_pointer(struct snd_pcm_substream *substream)594{595 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);596 struct snd_pcm_runtime *runtime = substream->runtime;597 struct atiixp_dma *dma = runtime->private_data;598 unsigned int curptr;599 int timeout = 1000;600 601 while (timeout--) {602 curptr = readl(chip->remap_addr + dma->ops->dt_cur);603 if (curptr < dma->buf_addr)604 continue;605 curptr -= dma->buf_addr;606 if (curptr >= dma->buf_bytes)607 continue;608 return bytes_to_frames(runtime, curptr);609 }610 dev_dbg(chip->card->dev, "invalid DMA pointer read 0x%x (buf=%x)\n",611 readl(chip->remap_addr + dma->ops->dt_cur), dma->buf_addr);612 return 0;613}614 615/*616 * XRUN detected, and stop the PCM substream617 */618static void snd_atiixp_xrun_dma(struct atiixp_modem *chip,619 struct atiixp_dma *dma)620{621 if (! dma->substream || ! dma->running)622 return;623 dev_dbg(chip->card->dev, "XRUN detected (DMA %d)\n", dma->ops->type);624 snd_pcm_stop_xrun(dma->substream);625}626 627/*628 * the period ack. update the substream.629 */630static void snd_atiixp_update_dma(struct atiixp_modem *chip,631 struct atiixp_dma *dma)632{633 if (! dma->substream || ! dma->running)634 return;635 snd_pcm_period_elapsed(dma->substream);636}637 638/* set BUS_BUSY interrupt bit if any DMA is running */639/* call with spinlock held */640static void snd_atiixp_check_bus_busy(struct atiixp_modem *chip)641{642 unsigned int bus_busy;643 if (atiixp_read(chip, CMD) & (ATI_REG_CMD_MODEM_SEND1_EN |644 ATI_REG_CMD_MODEM_RECEIVE_EN))645 bus_busy = ATI_REG_IER_MODEM_SET_BUS_BUSY;646 else647 bus_busy = 0;648 atiixp_update(chip, IER, ATI_REG_IER_MODEM_SET_BUS_BUSY, bus_busy);649}650 651/* common trigger callback652 * calling the lowlevel callbacks in it653 */654static int snd_atiixp_pcm_trigger(struct snd_pcm_substream *substream, int cmd)655{656 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);657 struct atiixp_dma *dma = substream->runtime->private_data;658 int err = 0;659 660 if (snd_BUG_ON(!dma->ops->enable_transfer ||661 !dma->ops->flush_dma))662 return -EINVAL;663 664 spin_lock(&chip->reg_lock);665 switch(cmd) {666 case SNDRV_PCM_TRIGGER_START:667 dma->ops->enable_transfer(chip, 1);668 dma->running = 1;669 break;670 case SNDRV_PCM_TRIGGER_STOP:671 dma->ops->enable_transfer(chip, 0);672 dma->running = 0;673 break;674 default:675 err = -EINVAL;676 break;677 }678 if (! err) {679 snd_atiixp_check_bus_busy(chip);680 if (cmd == SNDRV_PCM_TRIGGER_STOP) {681 dma->ops->flush_dma(chip);682 snd_atiixp_check_bus_busy(chip);683 }684 }685 spin_unlock(&chip->reg_lock);686 return err;687}688 689 690/*691 * lowlevel callbacks for each DMA type692 *693 * every callback is supposed to be called in chip->reg_lock spinlock694 */695 696/* flush FIFO of analog OUT DMA */697static void atiixp_out_flush_dma(struct atiixp_modem *chip)698{699 atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_OUT1_FLUSH);700}701 702/* enable/disable analog OUT DMA */703static void atiixp_out_enable_dma(struct atiixp_modem *chip, int on)704{705 unsigned int data;706 data = atiixp_read(chip, CMD);707 if (on) {708 if (data & ATI_REG_CMD_MODEM_OUT_DMA1_EN)709 return;710 atiixp_out_flush_dma(chip);711 data |= ATI_REG_CMD_MODEM_OUT_DMA1_EN;712 } else713 data &= ~ATI_REG_CMD_MODEM_OUT_DMA1_EN;714 atiixp_write(chip, CMD, data);715}716 717/* start/stop transfer over OUT DMA */718static void atiixp_out_enable_transfer(struct atiixp_modem *chip, int on)719{720 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_SEND1_EN,721 on ? ATI_REG_CMD_MODEM_SEND1_EN : 0);722}723 724/* enable/disable analog IN DMA */725static void atiixp_in_enable_dma(struct atiixp_modem *chip, int on)726{727 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_IN_DMA_EN,728 on ? ATI_REG_CMD_MODEM_IN_DMA_EN : 0);729}730 731/* start/stop analog IN DMA */732static void atiixp_in_enable_transfer(struct atiixp_modem *chip, int on)733{734 if (on) {735 unsigned int data = atiixp_read(chip, CMD);736 if (! (data & ATI_REG_CMD_MODEM_RECEIVE_EN)) {737 data |= ATI_REG_CMD_MODEM_RECEIVE_EN;738 atiixp_write(chip, CMD, data);739 }740 } else741 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_RECEIVE_EN, 0);742}743 744/* flush FIFO of analog IN DMA */745static void atiixp_in_flush_dma(struct atiixp_modem *chip)746{747 atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_IN_FLUSH);748}749 750/* set up slots and formats for analog OUT */751static int snd_atiixp_playback_prepare(struct snd_pcm_substream *substream)752{753 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);754 unsigned int data;755 756 spin_lock_irq(&chip->reg_lock);757 /* set output threshold */758 data = atiixp_read(chip, MODEM_OUT_FIFO);759 data &= ~ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK;760 data |= 0x04 << ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT;761 atiixp_write(chip, MODEM_OUT_FIFO, data);762 spin_unlock_irq(&chip->reg_lock);763 return 0;764}765 766/* set up slots and formats for analog IN */767static int snd_atiixp_capture_prepare(struct snd_pcm_substream *substream)768{769 return 0;770}771 772/*773 * hw_params - allocate the buffer and set up buffer descriptors774 */775static int snd_atiixp_pcm_hw_params(struct snd_pcm_substream *substream,776 struct snd_pcm_hw_params *hw_params)777{778 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);779 struct atiixp_dma *dma = substream->runtime->private_data;780 int err;781 int i;782 783 dma->buf_addr = substream->runtime->dma_addr;784 dma->buf_bytes = params_buffer_bytes(hw_params);785 786 err = atiixp_build_dma_packets(chip, dma, substream,787 params_periods(hw_params),788 params_period_bytes(hw_params));789 if (err < 0)790 return err;791 792 /* set up modem rate */793 for (i = 0; i < NUM_ATI_CODECS; i++) {794 if (! chip->ac97[i])795 continue;796 snd_ac97_write(chip->ac97[i], AC97_LINE1_RATE, params_rate(hw_params));797 snd_ac97_write(chip->ac97[i], AC97_LINE1_LEVEL, 0);798 }799 800 return err;801}802 803static int snd_atiixp_pcm_hw_free(struct snd_pcm_substream *substream)804{805 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);806 struct atiixp_dma *dma = substream->runtime->private_data;807 808 atiixp_clear_dma_packets(chip, dma, substream);809 return 0;810}811 812 813/*814 * pcm hardware definition, identical for all DMA types815 */816static const struct snd_pcm_hardware snd_atiixp_pcm_hw =817{818 .info = (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |819 SNDRV_PCM_INFO_BLOCK_TRANSFER |820 SNDRV_PCM_INFO_MMAP_VALID),821 .formats = SNDRV_PCM_FMTBIT_S16_LE,822 .rates = (SNDRV_PCM_RATE_8000 |823 SNDRV_PCM_RATE_16000 |824 SNDRV_PCM_RATE_KNOT),825 .rate_min = 8000,826 .rate_max = 16000,827 .channels_min = 2,828 .channels_max = 2,829 .buffer_bytes_max = 256 * 1024,830 .period_bytes_min = 32,831 .period_bytes_max = 128 * 1024,832 .periods_min = 2,833 .periods_max = ATI_MAX_DESCRIPTORS,834};835 836static int snd_atiixp_pcm_open(struct snd_pcm_substream *substream,837 struct atiixp_dma *dma, int pcm_type)838{839 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);840 struct snd_pcm_runtime *runtime = substream->runtime;841 int err;842 static const unsigned int rates[] = { 8000, 9600, 12000, 16000 };843 static const struct snd_pcm_hw_constraint_list hw_constraints_rates = {844 .count = ARRAY_SIZE(rates),845 .list = rates,846 .mask = 0,847 };848 849 if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma))850 return -EINVAL;851 852 if (dma->opened)853 return -EBUSY;854 dma->substream = substream;855 runtime->hw = snd_atiixp_pcm_hw;856 dma->ac97_pcm_type = pcm_type;857 err = snd_pcm_hw_constraint_list(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,858 &hw_constraints_rates);859 if (err < 0)860 return err;861 err = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS);862 if (err < 0)863 return err;864 runtime->private_data = dma;865 866 /* enable DMA bits */867 spin_lock_irq(&chip->reg_lock);868 dma->ops->enable_dma(chip, 1);869 spin_unlock_irq(&chip->reg_lock);870 dma->opened = 1;871 872 return 0;873}874 875static int snd_atiixp_pcm_close(struct snd_pcm_substream *substream,876 struct atiixp_dma *dma)877{878 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);879 /* disable DMA bits */880 if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma))881 return -EINVAL;882 spin_lock_irq(&chip->reg_lock);883 dma->ops->enable_dma(chip, 0);884 spin_unlock_irq(&chip->reg_lock);885 dma->substream = NULL;886 dma->opened = 0;887 return 0;888}889 890/*891 */892static int snd_atiixp_playback_open(struct snd_pcm_substream *substream)893{894 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);895 int err;896 897 mutex_lock(&chip->open_mutex);898 err = snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_PLAYBACK], 0);899 mutex_unlock(&chip->open_mutex);900 if (err < 0)901 return err;902 return 0;903}904 905static int snd_atiixp_playback_close(struct snd_pcm_substream *substream)906{907 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);908 int err;909 mutex_lock(&chip->open_mutex);910 err = snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_PLAYBACK]);911 mutex_unlock(&chip->open_mutex);912 return err;913}914 915static int snd_atiixp_capture_open(struct snd_pcm_substream *substream)916{917 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);918 return snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_CAPTURE], 1);919}920 921static int snd_atiixp_capture_close(struct snd_pcm_substream *substream)922{923 struct atiixp_modem *chip = snd_pcm_substream_chip(substream);924 return snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_CAPTURE]);925}926 927 928/* AC97 playback */929static const struct snd_pcm_ops snd_atiixp_playback_ops = {930 .open = snd_atiixp_playback_open,931 .close = snd_atiixp_playback_close,932 .hw_params = snd_atiixp_pcm_hw_params,933 .hw_free = snd_atiixp_pcm_hw_free,934 .prepare = snd_atiixp_playback_prepare,935 .trigger = snd_atiixp_pcm_trigger,936 .pointer = snd_atiixp_pcm_pointer,937};938 939/* AC97 capture */940static const struct snd_pcm_ops snd_atiixp_capture_ops = {941 .open = snd_atiixp_capture_open,942 .close = snd_atiixp_capture_close,943 .hw_params = snd_atiixp_pcm_hw_params,944 .hw_free = snd_atiixp_pcm_hw_free,945 .prepare = snd_atiixp_capture_prepare,946 .trigger = snd_atiixp_pcm_trigger,947 .pointer = snd_atiixp_pcm_pointer,948};949 950static const struct atiixp_dma_ops snd_atiixp_playback_dma_ops = {951 .type = ATI_DMA_PLAYBACK,952 .llp_offset = ATI_REG_MODEM_OUT_DMA1_LINKPTR,953 .dt_cur = ATI_REG_MODEM_OUT_DMA1_DT_CUR,954 .enable_dma = atiixp_out_enable_dma,955 .enable_transfer = atiixp_out_enable_transfer,956 .flush_dma = atiixp_out_flush_dma,957};958 959static const struct atiixp_dma_ops snd_atiixp_capture_dma_ops = {960 .type = ATI_DMA_CAPTURE,961 .llp_offset = ATI_REG_MODEM_IN_DMA_LINKPTR,962 .dt_cur = ATI_REG_MODEM_IN_DMA_DT_CUR,963 .enable_dma = atiixp_in_enable_dma,964 .enable_transfer = atiixp_in_enable_transfer,965 .flush_dma = atiixp_in_flush_dma,966};967 968static int snd_atiixp_pcm_new(struct atiixp_modem *chip)969{970 struct snd_pcm *pcm;971 int err;972 973 /* initialize constants */974 chip->dmas[ATI_DMA_PLAYBACK].ops = &snd_atiixp_playback_dma_ops;975 chip->dmas[ATI_DMA_CAPTURE].ops = &snd_atiixp_capture_dma_ops;976 977 /* PCM #0: analog I/O */978 err = snd_pcm_new(chip->card, "ATI IXP MC97", ATI_PCMDEV_ANALOG, 1, 1, &pcm);979 if (err < 0)980 return err;981 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_atiixp_playback_ops);982 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_atiixp_capture_ops);983 pcm->dev_class = SNDRV_PCM_CLASS_MODEM;984 pcm->private_data = chip;985 strcpy(pcm->name, "ATI IXP MC97");986 chip->pcmdevs[ATI_PCMDEV_ANALOG] = pcm;987 988 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV,989 &chip->pci->dev, 64*1024, 128*1024);990 991 return 0;992}993 994 995 996/*997 * interrupt handler998 */999static irqreturn_t snd_atiixp_interrupt(int irq, void *dev_id)1000{1001 struct atiixp_modem *chip = dev_id;1002 unsigned int status;1003 1004 status = atiixp_read(chip, ISR);1005 1006 if (! status)1007 return IRQ_NONE;1008 1009 /* process audio DMA */1010 if (status & ATI_REG_ISR_MODEM_OUT1_XRUN)1011 snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);1012 else if (status & ATI_REG_ISR_MODEM_OUT1_STATUS)1013 snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);1014 if (status & ATI_REG_ISR_MODEM_IN_XRUN)1015 snd_atiixp_xrun_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);1016 else if (status & ATI_REG_ISR_MODEM_IN_STATUS)1017 snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);1018 1019 /* for codec detection */1020 if (status & CODEC_CHECK_BITS) {1021 unsigned int detected;1022 detected = status & CODEC_CHECK_BITS;1023 spin_lock(&chip->reg_lock);1024 chip->codec_not_ready_bits |= detected;1025 atiixp_update(chip, IER, detected, 0); /* disable the detected irqs */1026 spin_unlock(&chip->reg_lock);1027 }1028 1029 /* ack */1030 atiixp_write(chip, ISR, status);1031 1032 return IRQ_HANDLED;1033}1034 1035 1036/*1037 * ac97 mixer section1038 */1039 1040static int snd_atiixp_mixer_new(struct atiixp_modem *chip, int clock)1041{1042 struct snd_ac97_bus *pbus;1043 struct snd_ac97_template ac97;1044 int i, err;1045 int codec_count;1046 static const struct snd_ac97_bus_ops ops = {1047 .write = snd_atiixp_ac97_write,1048 .read = snd_atiixp_ac97_read,1049 };1050 static const unsigned int codec_skip[NUM_ATI_CODECS] = {1051 ATI_REG_ISR_CODEC0_NOT_READY,1052 ATI_REG_ISR_CODEC1_NOT_READY,1053 ATI_REG_ISR_CODEC2_NOT_READY,1054 };1055 1056 if (snd_atiixp_codec_detect(chip) < 0)1057 return -ENXIO;1058 1059 err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus);1060 if (err < 0)1061 return err;1062 pbus->clock = clock;1063 chip->ac97_bus = pbus;1064 1065 codec_count = 0;1066 for (i = 0; i < NUM_ATI_CODECS; i++) {1067 if (chip->codec_not_ready_bits & codec_skip[i])1068 continue;1069 memset(&ac97, 0, sizeof(ac97));1070 ac97.private_data = chip;1071 ac97.pci = chip->pci;1072 ac97.num = i;1073 ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;1074 err = snd_ac97_mixer(pbus, &ac97, &chip->ac97[i]);1075 if (err < 0) {1076 chip->ac97[i] = NULL; /* to be sure */1077 dev_dbg(chip->card->dev,1078 "codec %d not available for modem\n", i);1079 continue;1080 }1081 codec_count++;1082 }1083 1084 if (! codec_count) {1085 dev_err(chip->card->dev, "no codec available\n");1086 return -ENODEV;1087 }1088 1089 /* snd_ac97_tune_hardware(chip->ac97, ac97_quirks); */1090 1091 return 0;1092}1093 1094 1095/*1096 * power management1097 */1098static int snd_atiixp_suspend(struct device *dev)1099{1100 struct snd_card *card = dev_get_drvdata(dev);1101 struct atiixp_modem *chip = card->private_data;1102 int i;1103 1104 snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);1105 for (i = 0; i < NUM_ATI_CODECS; i++)1106 snd_ac97_suspend(chip->ac97[i]);1107 snd_atiixp_aclink_down(chip);1108 snd_atiixp_chip_stop(chip);1109 return 0;1110}1111 1112static int snd_atiixp_resume(struct device *dev)1113{1114 struct snd_card *card = dev_get_drvdata(dev);1115 struct atiixp_modem *chip = card->private_data;1116 int i;1117 1118 snd_atiixp_aclink_reset(chip);1119 snd_atiixp_chip_start(chip);1120 1121 for (i = 0; i < NUM_ATI_CODECS; i++)1122 snd_ac97_resume(chip->ac97[i]);1123 1124 snd_power_change_state(card, SNDRV_CTL_POWER_D0);1125 return 0;1126}1127 1128static DEFINE_SIMPLE_DEV_PM_OPS(snd_atiixp_pm, snd_atiixp_suspend, snd_atiixp_resume);1129 1130/*1131 * proc interface for register dump1132 */1133 1134static void snd_atiixp_proc_read(struct snd_info_entry *entry,1135 struct snd_info_buffer *buffer)1136{1137 struct atiixp_modem *chip = entry->private_data;1138 int i;1139 1140 for (i = 0; i < 256; i += 4)1141 snd_iprintf(buffer, "%02x: %08x\n", i, readl(chip->remap_addr + i));1142}1143 1144static void snd_atiixp_proc_init(struct atiixp_modem *chip)1145{1146 snd_card_ro_proc_new(chip->card, "atiixp-modem", chip,1147 snd_atiixp_proc_read);1148}1149 1150 1151/*1152 * destructor1153 */1154 1155static void snd_atiixp_free(struct snd_card *card)1156{1157 snd_atiixp_chip_stop(card->private_data);1158}1159 1160/*1161 * constructor for chip instance1162 */1163static int snd_atiixp_init(struct snd_card *card, struct pci_dev *pci)1164{1165 struct atiixp_modem *chip = card->private_data;1166 int err;1167 1168 err = pcim_enable_device(pci);1169 if (err < 0)1170 return err;1171 1172 spin_lock_init(&chip->reg_lock);1173 mutex_init(&chip->open_mutex);1174 chip->card = card;1175 chip->pci = pci;1176 chip->irq = -1;1177 err = pcim_iomap_regions(pci, 1 << 0, "ATI IXP MC97");1178 if (err < 0)1179 return err;1180 chip->addr = pci_resource_start(pci, 0);1181 chip->remap_addr = pcim_iomap_table(pci)[0];1182 1183 if (devm_request_irq(&pci->dev, pci->irq, snd_atiixp_interrupt,1184 IRQF_SHARED, KBUILD_MODNAME, chip)) {1185 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);1186 return -EBUSY;1187 }1188 chip->irq = pci->irq;1189 card->sync_irq = chip->irq;1190 card->private_free = snd_atiixp_free;1191 pci_set_master(pci);1192 1193 return 0;1194}1195 1196 1197static int __snd_atiixp_probe(struct pci_dev *pci,1198 const struct pci_device_id *pci_id)1199{1200 struct snd_card *card;1201 struct atiixp_modem *chip;1202 int err;1203 1204 err = snd_devm_card_new(&pci->dev, index, id, THIS_MODULE,1205 sizeof(*chip), &card);1206 if (err < 0)1207 return err;1208 chip = card->private_data;1209 1210 strcpy(card->driver, "ATIIXP-MODEM");1211 strcpy(card->shortname, "ATI IXP Modem");1212 err = snd_atiixp_init(card, pci);1213 if (err < 0)1214 return err;1215 1216 err = snd_atiixp_aclink_reset(chip);1217 if (err < 0)1218 return err;1219 1220 err = snd_atiixp_mixer_new(chip, ac97_clock);1221 if (err < 0)1222 return err;1223 1224 err = snd_atiixp_pcm_new(chip);1225 if (err < 0)1226 return err;1227 1228 snd_atiixp_proc_init(chip);1229 1230 snd_atiixp_chip_start(chip);1231 1232 sprintf(card->longname, "%s rev %x at 0x%lx, irq %i",1233 card->shortname, pci->revision, chip->addr, chip->irq);1234 1235 err = snd_card_register(card);1236 if (err < 0)1237 return err;1238 1239 pci_set_drvdata(pci, card);1240 return 0;1241}1242 1243static int snd_atiixp_probe(struct pci_dev *pci,1244 const struct pci_device_id *pci_id)1245{1246 return snd_card_free_on_error(&pci->dev, __snd_atiixp_probe(pci, pci_id));1247}1248 1249static struct pci_driver atiixp_modem_driver = {1250 .name = KBUILD_MODNAME,1251 .id_table = snd_atiixp_ids,1252 .probe = snd_atiixp_probe,1253 .driver = {1254 .pm = &snd_atiixp_pm,1255 },1256};1257 1258module_pci_driver(atiixp_modem_driver);1259