1/*
   2 *   ALSA driver for ATI IXP 150/200/250 AC97 modem controllers
   3 *
   4 *	Copyright (c) 2004 Takashi Iwai <tiwai@suse.de>
   5 *
   6 *   This program is free software; you can redistribute it and/or modify
   7 *   it under the terms of the GNU General Public License as published by
   8 *   the Free Software Foundation; either version 2 of the License, or
   9 *   (at your option) any later version.
  10 *
  11 *   This program is distributed in the hope that it will be useful,
  12 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 *   GNU General Public License for more details.
  15 *
  16 *   You should have received a copy of the GNU General Public License
  17 *   along with this program; if not, write to the Free Software
  18 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  19 *
  20 */
  21
  22#include <asm/io.h>
  23#include <linux/delay.h>
  24#include <linux/interrupt.h>
  25#include <linux/init.h>
  26#include <linux/pci.h>
  27#include <linux/slab.h>
  28#include <linux/module.h>
  29#include <linux/mutex.h>
  30#include <sound/core.h>
  31#include <sound/pcm.h>
  32#include <sound/pcm_params.h>
  33#include <sound/info.h>
  34#include <sound/ac97_codec.h>
  35#include <sound/initval.h>
  36
  37MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
  38MODULE_DESCRIPTION("ATI IXP MC97 controller");
  39MODULE_LICENSE("GPL");
  40MODULE_SUPPORTED_DEVICE("{{ATI,IXP150/200/250}}");
  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 ATI IXP controller.");
  48module_param(id, charp, 0444);
  49MODULE_PARM_DESC(id, "ID string for ATI IXP controller.");
  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 */
  60
  61#define ATI_REG_ISR			0x00	/* interrupt source */
  62#define  ATI_REG_ISR_MODEM_IN_XRUN	(1U<<0)
  63#define  ATI_REG_ISR_MODEM_IN_STATUS	(1U<<1)
  64#define  ATI_REG_ISR_MODEM_OUT1_XRUN	(1U<<2)
  65#define  ATI_REG_ISR_MODEM_OUT1_STATUS	(1U<<3)
  66#define  ATI_REG_ISR_MODEM_OUT2_XRUN	(1U<<4)
  67#define  ATI_REG_ISR_MODEM_OUT2_STATUS	(1U<<5)
  68#define  ATI_REG_ISR_MODEM_OUT3_XRUN	(1U<<6)
  69#define  ATI_REG_ISR_MODEM_OUT3_STATUS	(1U<<7)
  70#define  ATI_REG_ISR_PHYS_INTR		(1U<<8)
  71#define  ATI_REG_ISR_PHYS_MISMATCH	(1U<<9)
  72#define  ATI_REG_ISR_CODEC0_NOT_READY	(1U<<10)
  73#define  ATI_REG_ISR_CODEC1_NOT_READY	(1U<<11)
  74#define  ATI_REG_ISR_CODEC2_NOT_READY	(1U<<12)
  75#define  ATI_REG_ISR_NEW_FRAME		(1U<<13)
  76#define  ATI_REG_ISR_MODEM_GPIO_DATA	(1U<<14)
  77
  78#define ATI_REG_IER			0x04	/* interrupt enable */
  79#define  ATI_REG_IER_MODEM_IN_XRUN_EN	(1U<<0)
  80#define  ATI_REG_IER_MODEM_STATUS_EN	(1U<<1)
  81#define  ATI_REG_IER_MODEM_OUT1_XRUN_EN	(1U<<2)
  82#define  ATI_REG_IER_MODEM_OUT2_XRUN_EN	(1U<<4)
  83#define  ATI_REG_IER_MODEM_OUT3_XRUN_EN	(1U<<6)
  84#define  ATI_REG_IER_PHYS_INTR_EN	(1U<<8)
  85#define  ATI_REG_IER_PHYS_MISMATCH_EN	(1U<<9)
  86#define  ATI_REG_IER_CODEC0_INTR_EN	(1U<<10)
  87#define  ATI_REG_IER_CODEC1_INTR_EN	(1U<<11)
  88#define  ATI_REG_IER_CODEC2_INTR_EN	(1U<<12)
  89#define  ATI_REG_IER_NEW_FRAME_EN	(1U<<13)	/* (RO */
  90#define  ATI_REG_IER_MODEM_GPIO_DATA_EN	(1U<<14)	/* (WO) modem is running */
  91#define  ATI_REG_IER_MODEM_SET_BUS_BUSY	(1U<<15)
  92
  93#define ATI_REG_CMD			0x08	/* command */
  94#define  ATI_REG_CMD_POWERDOWN	(1U<<0)
  95#define  ATI_REG_CMD_MODEM_RECEIVE_EN	(1U<<1)	/* modem only */
  96#define  ATI_REG_CMD_MODEM_SEND1_EN	(1U<<2)	/* modem only */
  97#define  ATI_REG_CMD_MODEM_SEND2_EN	(1U<<3)	/* modem only */
  98#define  ATI_REG_CMD_MODEM_SEND3_EN	(1U<<4)	/* modem only */
  99#define  ATI_REG_CMD_MODEM_STATUS_MEM	(1U<<5)	/* modem only */
 100#define  ATI_REG_CMD_MODEM_IN_DMA_EN	(1U<<8)	/* modem only */
 101#define  ATI_REG_CMD_MODEM_OUT_DMA1_EN	(1U<<9)	/* modem only */
 102#define  ATI_REG_CMD_MODEM_OUT_DMA2_EN	(1U<<10)	/* modem only */
 103#define  ATI_REG_CMD_MODEM_OUT_DMA3_EN	(1U<<11)	/* modem only */
 104#define  ATI_REG_CMD_AUDIO_PRESENT	(1U<<20)
 105#define  ATI_REG_CMD_MODEM_GPIO_THRU_DMA	(1U<<22)	/* modem only */
 106#define  ATI_REG_CMD_LOOPBACK_EN	(1U<<23)
 107#define  ATI_REG_CMD_PACKED_DIS		(1U<<24)
 108#define  ATI_REG_CMD_BURST_EN		(1U<<25)
 109#define  ATI_REG_CMD_PANIC_EN		(1U<<26)
 110#define  ATI_REG_CMD_MODEM_PRESENT	(1U<<27)
 111#define  ATI_REG_CMD_ACLINK_ACTIVE	(1U<<28)
 112#define  ATI_REG_CMD_AC_SOFT_RESET	(1U<<29)
 113#define  ATI_REG_CMD_AC_SYNC		(1U<<30)
 114#define  ATI_REG_CMD_AC_RESET		(1U<<31)
 115
 116#define ATI_REG_PHYS_OUT_ADDR		0x0c
 117#define  ATI_REG_PHYS_OUT_CODEC_MASK	(3U<<0)
 118#define  ATI_REG_PHYS_OUT_RW		(1U<<2)
 119#define  ATI_REG_PHYS_OUT_ADDR_EN	(1U<<8)
 120#define  ATI_REG_PHYS_OUT_ADDR_SHIFT	9
 121#define  ATI_REG_PHYS_OUT_DATA_SHIFT	16
 122
 123#define ATI_REG_PHYS_IN_ADDR		0x10
 124#define  ATI_REG_PHYS_IN_READ_FLAG	(1U<<8)
 125#define  ATI_REG_PHYS_IN_ADDR_SHIFT	9
 126#define  ATI_REG_PHYS_IN_DATA_SHIFT	16
 127
 128#define ATI_REG_SLOTREQ			0x14
 129
 130#define ATI_REG_COUNTER			0x18
 131#define  ATI_REG_COUNTER_SLOT		(3U<<0)	/* slot # */
 132#define  ATI_REG_COUNTER_BITCLOCK	(31U<<8)
 133
 134#define ATI_REG_IN_FIFO_THRESHOLD	0x1c
 135
 136#define ATI_REG_MODEM_IN_DMA_LINKPTR	0x20
 137#define ATI_REG_MODEM_IN_DMA_DT_START	0x24	/* RO */
 138#define ATI_REG_MODEM_IN_DMA_DT_NEXT	0x28	/* RO */
 139#define ATI_REG_MODEM_IN_DMA_DT_CUR	0x2c	/* RO */
 140#define ATI_REG_MODEM_IN_DMA_DT_SIZE	0x30
 141#define ATI_REG_MODEM_OUT_FIFO		0x34	/* output threshold */
 142#define  ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK	(0xf<<16)
 143#define  ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT	16
 144#define ATI_REG_MODEM_OUT_DMA1_LINKPTR	0x38
 145#define ATI_REG_MODEM_OUT_DMA2_LINKPTR	0x3c
 146#define ATI_REG_MODEM_OUT_DMA3_LINKPTR	0x40
 147#define ATI_REG_MODEM_OUT_DMA1_DT_START	0x44
 148#define ATI_REG_MODEM_OUT_DMA1_DT_NEXT	0x48
 149#define ATI_REG_MODEM_OUT_DMA1_DT_CUR	0x4c
 150#define ATI_REG_MODEM_OUT_DMA2_DT_START	0x50
 151#define ATI_REG_MODEM_OUT_DMA2_DT_NEXT	0x54
 152#define ATI_REG_MODEM_OUT_DMA2_DT_CUR	0x58
 153#define ATI_REG_MODEM_OUT_DMA3_DT_START	0x5c
 154#define ATI_REG_MODEM_OUT_DMA3_DT_NEXT	0x60
 155#define ATI_REG_MODEM_OUT_DMA3_DT_CUR	0x64
 156#define ATI_REG_MODEM_OUT_DMA12_DT_SIZE	0x68
 157#define ATI_REG_MODEM_OUT_DMA3_DT_SIZE	0x6c
 158#define ATI_REG_MODEM_OUT_FIFO_USED     0x70
 159#define ATI_REG_MODEM_OUT_GPIO		0x74
 160#define  ATI_REG_MODEM_OUT_GPIO_EN	   1
 161#define  ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT 5
 162#define ATI_REG_MODEM_IN_GPIO		0x78
 163
 164#define ATI_REG_MODEM_MIRROR		0x7c
 165#define ATI_REG_AUDIO_MIRROR		0x80
 166
 167#define ATI_REG_MODEM_FIFO_FLUSH	0x88
 168#define  ATI_REG_MODEM_FIFO_OUT1_FLUSH	(1U<<0)
 169#define  ATI_REG_MODEM_FIFO_OUT2_FLUSH	(1U<<1)
 170#define  ATI_REG_MODEM_FIFO_OUT3_FLUSH	(1U<<2)
 171#define  ATI_REG_MODEM_FIFO_IN_FLUSH	(1U<<3)
 172
 173/* LINKPTR */
 174#define  ATI_REG_LINKPTR_EN		(1U<<0)
 175
 176#define ATI_MAX_DESCRIPTORS	256	/* max number of descriptor packets */
 177
 178
 179struct atiixp_modem;
 180
 181/*
 182 * DMA packate descriptor
 183 */
 184
 185struct atiixp_dma_desc {
 186	u32 addr;	/* DMA buffer address */
 187	u16 status;	/* status bits */
 188	u16 size;	/* size of the packet in dwords */
 189	u32 next;	/* address of the next packet descriptor */
 190};
 191
 192/*
 193 * stream enum
 194 */
 195enum { ATI_DMA_PLAYBACK, ATI_DMA_CAPTURE, NUM_ATI_DMAS }; /* DMAs */
 196enum { ATI_PCM_OUT, ATI_PCM_IN, NUM_ATI_PCMS }; /* AC97 pcm slots */
 197enum { ATI_PCMDEV_ANALOG, NUM_ATI_PCMDEVS }; /* pcm devices */
 198
 199#define NUM_ATI_CODECS	3
 200
 201
 202/*
 203 * constants and callbacks for each DMA type
 204 */
 205struct atiixp_dma_ops {
 206	int type;			/* ATI_DMA_XXX */
 207	unsigned int llp_offset;	/* LINKPTR offset */
 208	unsigned int dt_cur;		/* DT_CUR offset */
 209	/* called from open callback */
 210	void (*enable_dma)(struct atiixp_modem *chip, int on);
 211	/* called from trigger (START/STOP) */
 212	void (*enable_transfer)(struct atiixp_modem *chip, int on);
 213 	/* called from trigger (STOP only) */
 214	void (*flush_dma)(struct atiixp_modem *chip);
 215};
 216
 217/*
 218 * DMA stream
 219 */
 220struct atiixp_dma {
 221	const struct atiixp_dma_ops *ops;
 222	struct snd_dma_buffer desc_buf;
 223	struct snd_pcm_substream *substream;	/* assigned PCM substream */
 224	unsigned int buf_addr, buf_bytes;	/* DMA buffer address, bytes */
 225	unsigned int period_bytes, periods;
 226	int opened;
 227	int running;
 228	int pcm_open_flag;
 229	int ac97_pcm_type;	/* index # of ac97_pcm to access, -1 = not used */
 230};
 231
 232/*
 233 * ATI IXP chip
 234 */
 235struct atiixp_modem {
 236	struct snd_card *card;
 237	struct pci_dev *pci;
 238
 239	struct resource *res;		/* memory i/o */
 240	unsigned long addr;
 241	void __iomem *remap_addr;
 242	int irq;
 243	
 244	struct snd_ac97_bus *ac97_bus;
 245	struct snd_ac97 *ac97[NUM_ATI_CODECS];
 246
 247	spinlock_t reg_lock;
 248
 249	struct atiixp_dma dmas[NUM_ATI_DMAS];
 250	struct ac97_pcm *pcms[NUM_ATI_PCMS];
 251	struct snd_pcm *pcmdevs[NUM_ATI_PCMDEVS];
 252
 253	int max_channels;		/* max. channels for PCM out */
 254
 255	unsigned int codec_not_ready_bits;	/* for codec detection */
 256
 257	int spdif_over_aclink;		/* passed from the module option */
 258	struct mutex open_mutex;	/* playback open mutex */
 259};
 260
 261
 262/*
 263 */
 264static DEFINE_PCI_DEVICE_TABLE(snd_atiixp_ids) = {
 265	{ PCI_VDEVICE(ATI, 0x434d), 0 }, /* SB200 */
 266	{ PCI_VDEVICE(ATI, 0x4378), 0 }, /* SB400 */
 267	{ 0, }
 268};
 269
 270MODULE_DEVICE_TABLE(pci, snd_atiixp_ids);
 271
 272
 273/*
 274 * lowlevel functions
 275 */
 276
 277/*
 278 * update the bits of the given register.
 279 * return 1 if the bits changed.
 280 */
 281static int snd_atiixp_update_bits(struct atiixp_modem *chip, unsigned int reg,
 282				  unsigned int mask, unsigned int value)
 283{
 284	void __iomem *addr = chip->remap_addr + reg;
 285	unsigned int data, old_data;
 286	old_data = data = readl(addr);
 287	data &= ~mask;
 288	data |= value;
 289	if (old_data == data)
 290		return 0;
 291	writel(data, addr);
 292	return 1;
 293}
 294
 295/*
 296 * macros for easy use
 297 */
 298#define atiixp_write(chip,reg,value) \
 299	writel(value, chip->remap_addr + ATI_REG_##reg)
 300#define atiixp_read(chip,reg) \
 301	readl(chip->remap_addr + ATI_REG_##reg)
 302#define atiixp_update(chip,reg,mask,val) \
 303	snd_atiixp_update_bits(chip, ATI_REG_##reg, mask, val)
 304
 305/*
 306 * handling DMA packets
 307 *
 308 * we allocate a linear buffer for the DMA, and split it to  each packet.
 309 * in a future version, a scatter-gather buffer should be implemented.
 310 */
 311
 312#define ATI_DESC_LIST_SIZE \
 313	PAGE_ALIGN(ATI_MAX_DESCRIPTORS * sizeof(struct atiixp_dma_desc))
 314
 315/*
 316 * build packets ring for the given buffer size.
 317 *
 318 * IXP handles the buffer descriptors, which are connected as a linked
 319 * list.  although we can change the list dynamically, in this version,
 320 * a static RING of buffer descriptors is used.
 321 *
 322 * the ring is built in this function, and is set up to the hardware. 
 323 */
 324static int atiixp_build_dma_packets(struct atiixp_modem *chip,
 325				    struct atiixp_dma *dma,
 326				    struct snd_pcm_substream *substream,
 327				    unsigned int periods,
 328				    unsigned int period_bytes)
 329{
 330	unsigned int i;
 331	u32 addr, desc_addr;
 332	unsigned long flags;
 333
 334	if (periods > ATI_MAX_DESCRIPTORS)
 335		return -ENOMEM;
 336
 337	if (dma->desc_buf.area == NULL) {
 338		if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
 339					ATI_DESC_LIST_SIZE, &dma->desc_buf) < 0)
 340			return -ENOMEM;
 341		dma->period_bytes = dma->periods = 0; /* clear */
 342	}
 343
 344	if (dma->periods == periods && dma->period_bytes == period_bytes)
 345		return 0;
 346
 347	/* reset DMA before changing the descriptor table */
 348	spin_lock_irqsave(&chip->reg_lock, flags);
 349	writel(0, chip->remap_addr + dma->ops->llp_offset);
 350	dma->ops->enable_dma(chip, 0);
 351	dma->ops->enable_dma(chip, 1);
 352	spin_unlock_irqrestore(&chip->reg_lock, flags);
 353
 354	/* fill the entries */
 355	addr = (u32)substream->runtime->dma_addr;
 356	desc_addr = (u32)dma->desc_buf.addr;
 357	for (i = 0; i < periods; i++) {
 358		struct atiixp_dma_desc *desc;
 359		desc = &((struct atiixp_dma_desc *)dma->desc_buf.area)[i];
 360		desc->addr = cpu_to_le32(addr);
 361		desc->status = 0;
 362		desc->size = period_bytes >> 2; /* in dwords */
 363		desc_addr += sizeof(struct atiixp_dma_desc);
 364		if (i == periods - 1)
 365			desc->next = cpu_to_le32((u32)dma->desc_buf.addr);
 366		else
 367			desc->next = cpu_to_le32(desc_addr);
 368		addr += period_bytes;
 369	}
 370
 371	writel((u32)dma->desc_buf.addr | ATI_REG_LINKPTR_EN,
 372	       chip->remap_addr + dma->ops->llp_offset);
 373
 374	dma->period_bytes = period_bytes;
 375	dma->periods = periods;
 376
 377	return 0;
 378}
 379
 380/*
 381 * remove the ring buffer and release it if assigned
 382 */
 383static void atiixp_clear_dma_packets(struct atiixp_modem *chip,
 384				     struct atiixp_dma *dma,
 385				     struct snd_pcm_substream *substream)
 386{
 387	if (dma->desc_buf.area) {
 388		writel(0, chip->remap_addr + dma->ops->llp_offset);
 389		snd_dma_free_pages(&dma->desc_buf);
 390		dma->desc_buf.area = NULL;
 391	}
 392}
 393
 394/*
 395 * AC97 interface
 396 */
 397static int snd_atiixp_acquire_codec(struct atiixp_modem *chip)
 398{
 399	int timeout = 1000;
 400
 401	while (atiixp_read(chip, PHYS_OUT_ADDR) & ATI_REG_PHYS_OUT_ADDR_EN) {
 402		if (! timeout--) {
 403			dev_warn(chip->card->dev, "codec acquire timeout\n");
 404			return -EBUSY;
 405		}
 406		udelay(1);
 407	}
 408	return 0;
 409}
 410
 411static unsigned short snd_atiixp_codec_read(struct atiixp_modem *chip,
 412					    unsigned short codec,
 413					    unsigned short reg)
 414{
 415	unsigned int data;
 416	int timeout;
 417
 418	if (snd_atiixp_acquire_codec(chip) < 0)
 419		return 0xffff;
 420	data = (reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) |
 421		ATI_REG_PHYS_OUT_ADDR_EN |
 422		ATI_REG_PHYS_OUT_RW |
 423		codec;
 424	atiixp_write(chip, PHYS_OUT_ADDR, data);
 425	if (snd_atiixp_acquire_codec(chip) < 0)
 426		return 0xffff;
 427	timeout = 1000;
 428	do {
 429		data = atiixp_read(chip, PHYS_IN_ADDR);
 430		if (data & ATI_REG_PHYS_IN_READ_FLAG)
 431			return data >> ATI_REG_PHYS_IN_DATA_SHIFT;
 432		udelay(1);
 433	} while (--timeout);
 434	/* time out may happen during reset */
 435	if (reg < 0x7c)
 436		dev_warn(chip->card->dev, "codec read timeout (reg %x)\n", reg);
 437	return 0xffff;
 438}
 439
 440
 441static void snd_atiixp_codec_write(struct atiixp_modem *chip,
 442				   unsigned short codec,
 443				   unsigned short reg, unsigned short val)
 444{
 445	unsigned int data;
 446    
 447	if (snd_atiixp_acquire_codec(chip) < 0)
 448		return;
 449	data = ((unsigned int)val << ATI_REG_PHYS_OUT_DATA_SHIFT) |
 450		((unsigned int)reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) |
 451		ATI_REG_PHYS_OUT_ADDR_EN | codec;
 452	atiixp_write(chip, PHYS_OUT_ADDR, data);
 453}
 454
 455
 456static unsigned short snd_atiixp_ac97_read(struct snd_ac97 *ac97,
 457					   unsigned short reg)
 458{
 459	struct atiixp_modem *chip = ac97->private_data;
 460	return snd_atiixp_codec_read(chip, ac97->num, reg);
 461    
 462}
 463
 464static void snd_atiixp_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
 465				  unsigned short val)
 466{
 467	struct atiixp_modem *chip = ac97->private_data;
 468	if (reg == AC97_GPIO_STATUS) {
 469		atiixp_write(chip, MODEM_OUT_GPIO,
 470			(val << ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT) | ATI_REG_MODEM_OUT_GPIO_EN);
 471		return;
 472	}
 473	snd_atiixp_codec_write(chip, ac97->num, reg, val);
 474}
 475
 476/*
 477 * reset AC link
 478 */
 479static int snd_atiixp_aclink_reset(struct atiixp_modem *chip)
 480{
 481	int timeout;
 482
 483	/* reset powerdoewn */
 484	if (atiixp_update(chip, CMD, ATI_REG_CMD_POWERDOWN, 0))
 485		udelay(10);
 486
 487	/* perform a software reset */
 488	atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, ATI_REG_CMD_AC_SOFT_RESET);
 489	atiixp_read(chip, CMD);
 490	udelay(10);
 491	atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, 0);
 492    
 493	timeout = 10;
 494	while (! (atiixp_read(chip, CMD) & ATI_REG_CMD_ACLINK_ACTIVE)) {
 495		/* do a hard reset */
 496		atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET,
 497			      ATI_REG_CMD_AC_SYNC);
 498		atiixp_read(chip, CMD);
 499		msleep(1);
 500		atiixp_update(chip, CMD, ATI_REG_CMD_AC_RESET, ATI_REG_CMD_AC_RESET);
 501		if (!--timeout) {
 502			dev_err(chip->card->dev, "codec reset timeout\n");
 503			break;
 504		}
 505	}
 506
 507	/* deassert RESET and assert SYNC to make sure */
 508	atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET,
 509		      ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET);
 510
 511	return 0;
 512}
 513
 514#ifdef CONFIG_PM_SLEEP
 515static int snd_atiixp_aclink_down(struct atiixp_modem *chip)
 516{
 517	// if (atiixp_read(chip, MODEM_MIRROR) & 0x1) /* modem running, too? */
 518	//	return -EBUSY;
 519	atiixp_update(chip, CMD,
 520		     ATI_REG_CMD_POWERDOWN | ATI_REG_CMD_AC_RESET,
 521		     ATI_REG_CMD_POWERDOWN);
 522	return 0;
 523}
 524#endif
 525
 526/*
 527 * auto-detection of codecs
 528 *
 529 * the IXP chip can generate interrupts for the non-existing codecs.
 530 * NEW_FRAME interrupt is used to make sure that the interrupt is generated
 531 * even if all three codecs are connected.
 532 */
 533
 534#define ALL_CODEC_NOT_READY \
 535	    (ATI_REG_ISR_CODEC0_NOT_READY |\
 536	     ATI_REG_ISR_CODEC1_NOT_READY |\
 537	     ATI_REG_ISR_CODEC2_NOT_READY)
 538#define CODEC_CHECK_BITS (ALL_CODEC_NOT_READY|ATI_REG_ISR_NEW_FRAME)
 539
 540static int snd_atiixp_codec_detect(struct atiixp_modem *chip)
 541{
 542	int timeout;
 543
 544	chip->codec_not_ready_bits = 0;
 545	atiixp_write(chip, IER, CODEC_CHECK_BITS);
 546	/* wait for the interrupts */
 547	timeout = 50;
 548	while (timeout-- > 0) {
 549		msleep(1);
 550		if (chip->codec_not_ready_bits)
 551			break;
 552	}
 553	atiixp_write(chip, IER, 0); /* disable irqs */
 554
 555	if ((chip->codec_not_ready_bits & ALL_CODEC_NOT_READY) == ALL_CODEC_NOT_READY) {
 556		dev_err(chip->card->dev, "no codec detected!\n");
 557		return -ENXIO;
 558	}
 559	return 0;
 560}
 561
 562
 563/*
 564 * enable DMA and irqs
 565 */
 566static int snd_atiixp_chip_start(struct atiixp_modem *chip)
 567{
 568	unsigned int reg;
 569
 570	/* set up spdif, enable burst mode */
 571	reg = atiixp_read(chip, CMD);
 572	reg |= ATI_REG_CMD_BURST_EN;
 573	if(!(reg & ATI_REG_CMD_MODEM_PRESENT))
 574		reg |= ATI_REG_CMD_MODEM_PRESENT;
 575	atiixp_write(chip, CMD, reg);
 576
 577	/* clear all interrupt source */
 578	atiixp_write(chip, ISR, 0xffffffff);
 579	/* enable irqs */
 580	atiixp_write(chip, IER,
 581		     ATI_REG_IER_MODEM_STATUS_EN |
 582		     ATI_REG_IER_MODEM_IN_XRUN_EN |
 583		     ATI_REG_IER_MODEM_OUT1_XRUN_EN);
 584	return 0;
 585}
 586
 587
 588/*
 589 * disable DMA and IRQs
 590 */
 591static int snd_atiixp_chip_stop(struct atiixp_modem *chip)
 592{
 593	/* clear interrupt source */
 594	atiixp_write(chip, ISR, atiixp_read(chip, ISR));
 595	/* disable irqs */
 596	atiixp_write(chip, IER, 0);
 597	return 0;
 598}
 599
 600
 601/*
 602 * PCM section
 603 */
 604
 605/*
 606 * pointer callback simplly reads XXX_DMA_DT_CUR register as the current
 607 * position.  when SG-buffer is implemented, the offset must be calculated
 608 * correctly...
 609 */
 610static snd_pcm_uframes_t snd_atiixp_pcm_pointer(struct snd_pcm_substream *substream)
 611{
 612	struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 613	struct snd_pcm_runtime *runtime = substream->runtime;
 614	struct atiixp_dma *dma = runtime->private_data;
 615	unsigned int curptr;
 616	int timeout = 1000;
 617
 618	while (timeout--) {
 619		curptr = readl(chip->remap_addr + dma->ops->dt_cur);
 620		if (curptr < dma->buf_addr)
 621			continue;
 622		curptr -= dma->buf_addr;
 623		if (curptr >= dma->buf_bytes)
 624			continue;
 625		return bytes_to_frames(runtime, curptr);
 626	}
 627	dev_dbg(chip->card->dev, "invalid DMA pointer read 0x%x (buf=%x)\n",
 628		   readl(chip->remap_addr + dma->ops->dt_cur), dma->buf_addr);
 629	return 0;
 630}
 631
 632/*
 633 * XRUN detected, and stop the PCM substream
 634 */
 635static void snd_atiixp_xrun_dma(struct atiixp_modem *chip,
 636				struct atiixp_dma *dma)
 637{
 638	if (! dma->substream || ! dma->running)
 639		return;
 640	dev_dbg(chip->card->dev, "XRUN detected (DMA %d)\n", dma->ops->type);
 641	snd_pcm_stream_lock(dma->substream);
 642	snd_pcm_stop(dma->substream, SNDRV_PCM_STATE_XRUN);
 643	snd_pcm_stream_unlock(dma->substream);
 644}
 645
 646/*
 647 * the period ack.  update the substream.
 648 */
 649static void snd_atiixp_update_dma(struct atiixp_modem *chip,
 650				  struct atiixp_dma *dma)
 651{
 652	if (! dma->substream || ! dma->running)
 653		return;
 654	snd_pcm_period_elapsed(dma->substream);
 655}
 656
 657/* set BUS_BUSY interrupt bit if any DMA is running */
 658/* call with spinlock held */
 659static void snd_atiixp_check_bus_busy(struct atiixp_modem *chip)
 660{
 661	unsigned int bus_busy;
 662	if (atiixp_read(chip, CMD) & (ATI_REG_CMD_MODEM_SEND1_EN |
 663				      ATI_REG_CMD_MODEM_RECEIVE_EN))
 664		bus_busy = ATI_REG_IER_MODEM_SET_BUS_BUSY;
 665	else
 666		bus_busy = 0;
 667	atiixp_update(chip, IER, ATI_REG_IER_MODEM_SET_BUS_BUSY, bus_busy);
 668}
 669
 670/* common trigger callback
 671 * calling the lowlevel callbacks in it
 672 */
 673static int snd_atiixp_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 674{
 675	struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 676	struct atiixp_dma *dma = substream->runtime->private_data;
 677	int err = 0;
 678
 679	if (snd_BUG_ON(!dma->ops->enable_transfer ||
 680		       !dma->ops->flush_dma))
 681		return -EINVAL;
 682
 683	spin_lock(&chip->reg_lock);
 684	switch(cmd) {
 685	case SNDRV_PCM_TRIGGER_START:
 686		dma->ops->enable_transfer(chip, 1);
 687		dma->running = 1;
 688		break;
 689	case SNDRV_PCM_TRIGGER_STOP:
 690		dma->ops->enable_transfer(chip, 0);
 691		dma->running = 0;
 692		break;
 693	default:
 694		err = -EINVAL;
 695		break;
 696	}
 697	if (! err) {
 698	snd_atiixp_check_bus_busy(chip);
 699	if (cmd == SNDRV_PCM_TRIGGER_STOP) {
 700		dma->ops->flush_dma(chip);
 701		snd_atiixp_check_bus_busy(chip);
 702	}
 703	}
 704	spin_unlock(&chip->reg_lock);
 705	return err;
 706}
 707
 708
 709/*
 710 * lowlevel callbacks for each DMA type
 711 *
 712 * every callback is supposed to be called in chip->reg_lock spinlock
 713 */
 714
 715/* flush FIFO of analog OUT DMA */
 716static void atiixp_out_flush_dma(struct atiixp_modem *chip)
 717{
 718	atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_OUT1_FLUSH);
 719}
 720
 721/* enable/disable analog OUT DMA */
 722static void atiixp_out_enable_dma(struct atiixp_modem *chip, int on)
 723{
 724	unsigned int data;
 725	data = atiixp_read(chip, CMD);
 726	if (on) {
 727		if (data & ATI_REG_CMD_MODEM_OUT_DMA1_EN)
 728			return;
 729		atiixp_out_flush_dma(chip);
 730		data |= ATI_REG_CMD_MODEM_OUT_DMA1_EN;
 731	} else
 732		data &= ~ATI_REG_CMD_MODEM_OUT_DMA1_EN;
 733	atiixp_write(chip, CMD, data);
 734}
 735
 736/* start/stop transfer over OUT DMA */
 737static void atiixp_out_enable_transfer(struct atiixp_modem *chip, int on)
 738{
 739	atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_SEND1_EN,
 740		      on ? ATI_REG_CMD_MODEM_SEND1_EN : 0);
 741}
 742
 743/* enable/disable analog IN DMA */
 744static void atiixp_in_enable_dma(struct atiixp_modem *chip, int on)
 745{
 746	atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_IN_DMA_EN,
 747		      on ? ATI_REG_CMD_MODEM_IN_DMA_EN : 0);
 748}
 749
 750/* start/stop analog IN DMA */
 751static void atiixp_in_enable_transfer(struct atiixp_modem *chip, int on)
 752{
 753	if (on) {
 754		unsigned int data = atiixp_read(chip, CMD);
 755		if (! (data & ATI_REG_CMD_MODEM_RECEIVE_EN)) {
 756			data |= ATI_REG_CMD_MODEM_RECEIVE_EN;
 757			atiixp_write(chip, CMD, data);
 758		}
 759	} else
 760		atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_RECEIVE_EN, 0);
 761}
 762
 763/* flush FIFO of analog IN DMA */
 764static void atiixp_in_flush_dma(struct atiixp_modem *chip)
 765{
 766	atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_IN_FLUSH);
 767}
 768
 769/* set up slots and formats for analog OUT */
 770static int snd_atiixp_playback_prepare(struct snd_pcm_substream *substream)
 771{
 772	struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 773	unsigned int data;
 774
 775	spin_lock_irq(&chip->reg_lock);
 776	/* set output threshold */
 777	data = atiixp_read(chip, MODEM_OUT_FIFO);
 778	data &= ~ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK;
 779	data |= 0x04 << ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT;
 780	atiixp_write(chip, MODEM_OUT_FIFO, data);
 781	spin_unlock_irq(&chip->reg_lock);
 782	return 0;
 783}
 784
 785/* set up slots and formats for analog IN */
 786static int snd_atiixp_capture_prepare(struct snd_pcm_substream *substream)
 787{
 788	return 0;
 789}
 790
 791/*
 792 * hw_params - allocate the buffer and set up buffer descriptors
 793 */
 794static int snd_atiixp_pcm_hw_params(struct snd_pcm_substream *substream,
 795				   struct snd_pcm_hw_params *hw_params)
 796{
 797	struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 798	struct atiixp_dma *dma = substream->runtime->private_data;
 799	int err;
 800	int i;
 801
 802	err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 803	if (err < 0)
 804		return err;
 805	dma->buf_addr = substream->runtime->dma_addr;
 806	dma->buf_bytes = params_buffer_bytes(hw_params);
 807
 808	err = atiixp_build_dma_packets(chip, dma, substream,
 809				       params_periods(hw_params),
 810				       params_period_bytes(hw_params));
 811	if (err < 0)
 812		return err;
 813
 814	/* set up modem rate */
 815	for (i = 0; i < NUM_ATI_CODECS; i++) {
 816		if (! chip->ac97[i])
 817			continue;
 818		snd_ac97_write(chip->ac97[i], AC97_LINE1_RATE, params_rate(hw_params));
 819		snd_ac97_write(chip->ac97[i], AC97_LINE1_LEVEL, 0);
 820	}
 821
 822	return err;
 823}
 824
 825static int snd_atiixp_pcm_hw_free(struct snd_pcm_substream *substream)
 826{
 827	struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 828	struct atiixp_dma *dma = substream->runtime->private_data;
 829
 830	atiixp_clear_dma_packets(chip, dma, substream);
 831	snd_pcm_lib_free_pages(substream);
 832	return 0;
 833}
 834
 835
 836/*
 837 * pcm hardware definition, identical for all DMA types
 838 */
 839static struct snd_pcm_hardware snd_atiixp_pcm_hw =
 840{
 841	.info =			(SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 842				 SNDRV_PCM_INFO_BLOCK_TRANSFER |
 843				 SNDRV_PCM_INFO_MMAP_VALID),
 844	.formats =		SNDRV_PCM_FMTBIT_S16_LE,
 845	.rates =		(SNDRV_PCM_RATE_8000 |
 846				 SNDRV_PCM_RATE_16000 |
 847				 SNDRV_PCM_RATE_KNOT),
 848	.rate_min =		8000,
 849	.rate_max =		16000,
 850	.channels_min =		2,
 851	.channels_max =		2,
 852	.buffer_bytes_max =	256 * 1024,
 853	.period_bytes_min =	32,
 854	.period_bytes_max =	128 * 1024,
 855	.periods_min =		2,
 856	.periods_max =		ATI_MAX_DESCRIPTORS,
 857};
 858
 859static int snd_atiixp_pcm_open(struct snd_pcm_substream *substream,
 860			       struct atiixp_dma *dma, int pcm_type)
 861{
 862	struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 863	struct snd_pcm_runtime *runtime = substream->runtime;
 864	int err;
 865	static unsigned int rates[] = { 8000,  9600, 12000, 16000 };
 866	static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
 867		.count = ARRAY_SIZE(rates),
 868		.list = rates,
 869		.mask = 0,
 870	};
 871
 872	if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma))
 873		return -EINVAL;
 874
 875	if (dma->opened)
 876		return -EBUSY;
 877	dma->substream = substream;
 878	runtime->hw = snd_atiixp_pcm_hw;
 879	dma->ac97_pcm_type = pcm_type;
 880	if ((err = snd_pcm_hw_constraint_list(runtime, 0,
 881					      SNDRV_PCM_HW_PARAM_RATE,
 882					      &hw_constraints_rates)) < 0)
 883		return err;
 884	if ((err = snd_pcm_hw_constraint_integer(runtime,
 885						 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 886		return err;
 887	runtime->private_data = dma;
 888
 889	/* enable DMA bits */
 890	spin_lock_irq(&chip->reg_lock);
 891	dma->ops->enable_dma(chip, 1);
 892	spin_unlock_irq(&chip->reg_lock);
 893	dma->opened = 1;
 894
 895	return 0;
 896}
 897
 898static int snd_atiixp_pcm_close(struct snd_pcm_substream *substream,
 899				struct atiixp_dma *dma)
 900{
 901	struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 902	/* disable DMA bits */
 903	if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma))
 904		return -EINVAL;
 905	spin_lock_irq(&chip->reg_lock);
 906	dma->ops->enable_dma(chip, 0);
 907	spin_unlock_irq(&chip->reg_lock);
 908	dma->substream = NULL;
 909	dma->opened = 0;
 910	return 0;
 911}
 912
 913/*
 914 */
 915static int snd_atiixp_playback_open(struct snd_pcm_substream *substream)
 916{
 917	struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 918	int err;
 919
 920	mutex_lock(&chip->open_mutex);
 921	err = snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_PLAYBACK], 0);
 922	mutex_unlock(&chip->open_mutex);
 923	if (err < 0)
 924		return err;
 925	return 0;
 926}
 927
 928static int snd_atiixp_playback_close(struct snd_pcm_substream *substream)
 929{
 930	struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 931	int err;
 932	mutex_lock(&chip->open_mutex);
 933	err = snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_PLAYBACK]);
 934	mutex_unlock(&chip->open_mutex);
 935	return err;
 936}
 937
 938static int snd_atiixp_capture_open(struct snd_pcm_substream *substream)
 939{
 940	struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 941	return snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_CAPTURE], 1);
 942}
 943
 944static int snd_atiixp_capture_close(struct snd_pcm_substream *substream)
 945{
 946	struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 947	return snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_CAPTURE]);
 948}
 949
 950
 951/* AC97 playback */
 952static struct snd_pcm_ops snd_atiixp_playback_ops = {
 953	.open =		snd_atiixp_playback_open,
 954	.close =	snd_atiixp_playback_close,
 955	.ioctl =	snd_pcm_lib_ioctl,
 956	.hw_params =	snd_atiixp_pcm_hw_params,
 957	.hw_free =	snd_atiixp_pcm_hw_free,
 958	.prepare =	snd_atiixp_playback_prepare,
 959	.trigger =	snd_atiixp_pcm_trigger,
 960	.pointer =	snd_atiixp_pcm_pointer,
 961};
 962
 963/* AC97 capture */
 964static struct snd_pcm_ops snd_atiixp_capture_ops = {
 965	.open =		snd_atiixp_capture_open,
 966	.close =	snd_atiixp_capture_close,
 967	.ioctl =	snd_pcm_lib_ioctl,
 968	.hw_params =	snd_atiixp_pcm_hw_params,
 969	.hw_free =	snd_atiixp_pcm_hw_free,
 970	.prepare =	snd_atiixp_capture_prepare,
 971	.trigger =	snd_atiixp_pcm_trigger,
 972	.pointer =	snd_atiixp_pcm_pointer,
 973};
 974
 975static struct atiixp_dma_ops snd_atiixp_playback_dma_ops = {
 976	.type = ATI_DMA_PLAYBACK,
 977	.llp_offset = ATI_REG_MODEM_OUT_DMA1_LINKPTR,
 978	.dt_cur = ATI_REG_MODEM_OUT_DMA1_DT_CUR,
 979	.enable_dma = atiixp_out_enable_dma,
 980	.enable_transfer = atiixp_out_enable_transfer,
 981	.flush_dma = atiixp_out_flush_dma,
 982};
 983	
 984static struct atiixp_dma_ops snd_atiixp_capture_dma_ops = {
 985	.type = ATI_DMA_CAPTURE,
 986	.llp_offset = ATI_REG_MODEM_IN_DMA_LINKPTR,
 987	.dt_cur = ATI_REG_MODEM_IN_DMA_DT_CUR,
 988	.enable_dma = atiixp_in_enable_dma,
 989	.enable_transfer = atiixp_in_enable_transfer,
 990	.flush_dma = atiixp_in_flush_dma,
 991};
 992
 993static int snd_atiixp_pcm_new(struct atiixp_modem *chip)
 994{
 995	struct snd_pcm *pcm;
 996	int err;
 997
 998	/* initialize constants */
 999	chip->dmas[ATI_DMA_PLAYBACK].ops = &snd_atiixp_playback_dma_ops;
1000	chip->dmas[ATI_DMA_CAPTURE].ops = &snd_atiixp_capture_dma_ops;
1001
1002	/* PCM #0: analog I/O */
1003	err = snd_pcm_new(chip->card, "ATI IXP MC97", ATI_PCMDEV_ANALOG, 1, 1, &pcm);
1004	if (err < 0)
1005		return err;
1006	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_atiixp_playback_ops);
1007	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_atiixp_capture_ops);
1008	pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
1009	pcm->private_data = chip;
1010	strcpy(pcm->name, "ATI IXP MC97");
1011	chip->pcmdevs[ATI_PCMDEV_ANALOG] = pcm;
1012
1013	snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
1014					      snd_dma_pci_data(chip->pci),
1015					      64*1024, 128*1024);
1016
1017	return 0;
1018}
1019
1020
1021
1022/*
1023 * interrupt handler
1024 */
1025static irqreturn_t snd_atiixp_interrupt(int irq, void *dev_id)
1026{
1027	struct atiixp_modem *chip = dev_id;
1028	unsigned int status;
1029
1030	status = atiixp_read(chip, ISR);
1031
1032	if (! status)
1033		return IRQ_NONE;
1034
1035	/* process audio DMA */
1036	if (status & ATI_REG_ISR_MODEM_OUT1_XRUN)
1037		snd_atiixp_xrun_dma(chip,  &chip->dmas[ATI_DMA_PLAYBACK]);
1038	else if (status & ATI_REG_ISR_MODEM_OUT1_STATUS)
1039		snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);
1040	if (status & ATI_REG_ISR_MODEM_IN_XRUN)
1041		snd_atiixp_xrun_dma(chip,  &chip->dmas[ATI_DMA_CAPTURE]);
1042	else if (status & ATI_REG_ISR_MODEM_IN_STATUS)
1043		snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);
1044
1045	/* for codec detection */
1046	if (status & CODEC_CHECK_BITS) {
1047		unsigned int detected;
1048		detected = status & CODEC_CHECK_BITS;
1049		spin_lock(&chip->reg_lock);
1050		chip->codec_not_ready_bits |= detected;
1051		atiixp_update(chip, IER, detected, 0); /* disable the detected irqs */
1052		spin_unlock(&chip->reg_lock);
1053	}
1054
1055	/* ack */
1056	atiixp_write(chip, ISR, status);
1057
1058	return IRQ_HANDLED;
1059}
1060
1061
1062/*
1063 * ac97 mixer section
1064 */
1065
1066static int snd_atiixp_mixer_new(struct atiixp_modem *chip, int clock)
1067{
1068	struct snd_ac97_bus *pbus;
1069	struct snd_ac97_template ac97;
1070	int i, err;
1071	int codec_count;
1072	static struct snd_ac97_bus_ops ops = {
1073		.write = snd_atiixp_ac97_write,
1074		.read = snd_atiixp_ac97_read,
1075	};
1076	static unsigned int codec_skip[NUM_ATI_CODECS] = {
1077		ATI_REG_ISR_CODEC0_NOT_READY,
1078		ATI_REG_ISR_CODEC1_NOT_READY,
1079		ATI_REG_ISR_CODEC2_NOT_READY,
1080	};
1081
1082	if (snd_atiixp_codec_detect(chip) < 0)
1083		return -ENXIO;
1084
1085	if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus)) < 0)
1086		return err;
1087	pbus->clock = clock;
1088	chip->ac97_bus = pbus;
1089
1090	codec_count = 0;
1091	for (i = 0; i < NUM_ATI_CODECS; i++) {
1092		if (chip->codec_not_ready_bits & codec_skip[i])
1093			continue;
1094		memset(&ac97, 0, sizeof(ac97));
1095		ac97.private_data = chip;
1096		ac97.pci = chip->pci;
1097		ac97.num = i;
1098		ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;
1099		if ((err = snd_ac97_mixer(pbus, &ac97, &chip->ac97[i])) < 0) {
1100			chip->ac97[i] = NULL; /* to be sure */
1101			dev_dbg(chip->card->dev,
1102				"codec %d not available for modem\n", i);
1103			continue;
1104		}
1105		codec_count++;
1106	}
1107
1108	if (! codec_count) {
1109		dev_err(chip->card->dev, "no codec available\n");
1110		return -ENODEV;
1111	}
1112
1113	/* snd_ac97_tune_hardware(chip->ac97, ac97_quirks); */
1114
1115	return 0;
1116}
1117
1118
1119#ifdef CONFIG_PM_SLEEP
1120/*
1121 * power management
1122 */
1123static int snd_atiixp_suspend(struct device *dev)
1124{
1125	struct pci_dev *pci = to_pci_dev(dev);
1126	struct snd_card *card = dev_get_drvdata(dev);
1127	struct atiixp_modem *chip = card->private_data;
1128	int i;
1129
1130	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1131	for (i = 0; i < NUM_ATI_PCMDEVS; i++)
1132		snd_pcm_suspend_all(chip->pcmdevs[i]);
1133	for (i = 0; i < NUM_ATI_CODECS; i++)
1134		snd_ac97_suspend(chip->ac97[i]);
1135	snd_atiixp_aclink_down(chip);
1136	snd_atiixp_chip_stop(chip);
1137
1138	pci_disable_device(pci);
1139	pci_save_state(pci);
1140	pci_set_power_state(pci, PCI_D3hot);
1141	return 0;
1142}
1143
1144static int snd_atiixp_resume(struct device *dev)
1145{
1146	struct pci_dev *pci = to_pci_dev(dev);
1147	struct snd_card *card = dev_get_drvdata(dev);
1148	struct atiixp_modem *chip = card->private_data;
1149	int i;
1150
1151	pci_set_power_state(pci, PCI_D0);
1152	pci_restore_state(pci);
1153	if (pci_enable_device(pci) < 0) {
1154		dev_err(dev, "pci_enable_device failed, disabling device\n");
 
1155		snd_card_disconnect(card);
1156		return -EIO;
1157	}
1158	pci_set_master(pci);
1159
1160	snd_atiixp_aclink_reset(chip);
1161	snd_atiixp_chip_start(chip);
1162
1163	for (i = 0; i < NUM_ATI_CODECS; i++)
1164		snd_ac97_resume(chip->ac97[i]);
1165
1166	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1167	return 0;
1168}
 
1169
1170static SIMPLE_DEV_PM_OPS(snd_atiixp_pm, snd_atiixp_suspend, snd_atiixp_resume);
1171#define SND_ATIIXP_PM_OPS	&snd_atiixp_pm
1172#else
1173#define SND_ATIIXP_PM_OPS	NULL
1174#endif /* CONFIG_PM_SLEEP */
1175
1176#ifdef CONFIG_PROC_FS
1177/*
1178 * proc interface for register dump
1179 */
1180
1181static void snd_atiixp_proc_read(struct snd_info_entry *entry,
1182				 struct snd_info_buffer *buffer)
1183{
1184	struct atiixp_modem *chip = entry->private_data;
1185	int i;
1186
1187	for (i = 0; i < 256; i += 4)
1188		snd_iprintf(buffer, "%02x: %08x\n", i, readl(chip->remap_addr + i));
1189}
1190
1191static void snd_atiixp_proc_init(struct atiixp_modem *chip)
1192{
1193	struct snd_info_entry *entry;
1194
1195	if (! snd_card_proc_new(chip->card, "atiixp-modem", &entry))
1196		snd_info_set_text_ops(entry, chip, snd_atiixp_proc_read);
1197}
1198#else
1199#define snd_atiixp_proc_init(chip)
1200#endif
1201
1202
1203/*
1204 * destructor
1205 */
1206
1207static int snd_atiixp_free(struct atiixp_modem *chip)
1208{
1209	if (chip->irq < 0)
1210		goto __hw_end;
1211	snd_atiixp_chip_stop(chip);
1212
1213      __hw_end:
1214	if (chip->irq >= 0)
1215		free_irq(chip->irq, chip);
1216	if (chip->remap_addr)
1217		iounmap(chip->remap_addr);
1218	pci_release_regions(chip->pci);
1219	pci_disable_device(chip->pci);
1220	kfree(chip);
1221	return 0;
1222}
1223
1224static int snd_atiixp_dev_free(struct snd_device *device)
1225{
1226	struct atiixp_modem *chip = device->device_data;
1227	return snd_atiixp_free(chip);
1228}
1229
1230/*
1231 * constructor for chip instance
1232 */
1233static int snd_atiixp_create(struct snd_card *card,
1234			     struct pci_dev *pci,
1235			     struct atiixp_modem **r_chip)
1236{
1237	static struct snd_device_ops ops = {
1238		.dev_free =	snd_atiixp_dev_free,
1239	};
1240	struct atiixp_modem *chip;
1241	int err;
1242
1243	if ((err = pci_enable_device(pci)) < 0)
1244		return err;
1245
1246	chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1247	if (chip == NULL) {
1248		pci_disable_device(pci);
1249		return -ENOMEM;
1250	}
1251
1252	spin_lock_init(&chip->reg_lock);
1253	mutex_init(&chip->open_mutex);
1254	chip->card = card;
1255	chip->pci = pci;
1256	chip->irq = -1;
1257	if ((err = pci_request_regions(pci, "ATI IXP MC97")) < 0) {
1258		kfree(chip);
1259		pci_disable_device(pci);
1260		return err;
1261	}
1262	chip->addr = pci_resource_start(pci, 0);
1263	chip->remap_addr = pci_ioremap_bar(pci, 0);
1264	if (chip->remap_addr == NULL) {
1265		dev_err(card->dev, "AC'97 space ioremap problem\n");
1266		snd_atiixp_free(chip);
1267		return -EIO;
1268	}
1269
1270	if (request_irq(pci->irq, snd_atiixp_interrupt, IRQF_SHARED,
1271			KBUILD_MODNAME, chip)) {
1272		dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
1273		snd_atiixp_free(chip);
1274		return -EBUSY;
1275	}
1276	chip->irq = pci->irq;
1277	pci_set_master(pci);
1278	synchronize_irq(chip->irq);
1279
1280	if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1281		snd_atiixp_free(chip);
1282		return err;
1283	}
1284
 
 
1285	*r_chip = chip;
1286	return 0;
1287}
1288
1289
1290static int snd_atiixp_probe(struct pci_dev *pci,
1291			    const struct pci_device_id *pci_id)
1292{
1293	struct snd_card *card;
1294	struct atiixp_modem *chip;
1295	int err;
1296
1297	err = snd_card_new(&pci->dev, index, id, THIS_MODULE, 0, &card);
1298	if (err < 0)
1299		return err;
1300
1301	strcpy(card->driver, "ATIIXP-MODEM");
1302	strcpy(card->shortname, "ATI IXP Modem");
1303	if ((err = snd_atiixp_create(card, pci, &chip)) < 0)
1304		goto __error;
1305	card->private_data = chip;
1306
1307	if ((err = snd_atiixp_aclink_reset(chip)) < 0)
1308		goto __error;
1309
1310	if ((err = snd_atiixp_mixer_new(chip, ac97_clock)) < 0)
1311		goto __error;
1312
1313	if ((err = snd_atiixp_pcm_new(chip)) < 0)
1314		goto __error;
1315	
1316	snd_atiixp_proc_init(chip);
1317
1318	snd_atiixp_chip_start(chip);
1319
1320	sprintf(card->longname, "%s rev %x at 0x%lx, irq %i",
1321		card->shortname, pci->revision, chip->addr, chip->irq);
1322
1323	if ((err = snd_card_register(card)) < 0)
1324		goto __error;
1325
1326	pci_set_drvdata(pci, card);
1327	return 0;
1328
1329 __error:
1330	snd_card_free(card);
1331	return err;
1332}
1333
1334static void snd_atiixp_remove(struct pci_dev *pci)
1335{
1336	snd_card_free(pci_get_drvdata(pci));
 
1337}
1338
1339static struct pci_driver atiixp_modem_driver = {
1340	.name = KBUILD_MODNAME,
1341	.id_table = snd_atiixp_ids,
1342	.probe = snd_atiixp_probe,
1343	.remove = snd_atiixp_remove,
1344	.driver = {
1345		.pm = SND_ATIIXP_PM_OPS,
1346	},
 
1347};
1348
1349module_pci_driver(atiixp_modem_driver);