linux/sound/pci/atiixp_modem.c
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   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                        snd_printk(KERN_WARNING "atiixp-modem: 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                snd_printk(KERN_WARNING "atiixp-modem: 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                        snd_printk(KERN_ERR "atiixp-modem: 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                snd_printk(KERN_ERR "atiixp-modem: 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        snd_printd("atiixp-modem: 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        snd_printdd("atiixp-modem: XRUN detected (DMA %d)\n", dma->ops->type);
 641        snd_pcm_stop(dma->substream, SNDRV_PCM_STATE_XRUN);
 642}
 643
 644/*
 645 * the period ack.  update the substream.
 646 */
 647static void snd_atiixp_update_dma(struct atiixp_modem *chip,
 648                                  struct atiixp_dma *dma)
 649{
 650        if (! dma->substream || ! dma->running)
 651                return;
 652        snd_pcm_period_elapsed(dma->substream);
 653}
 654
 655/* set BUS_BUSY interrupt bit if any DMA is running */
 656/* call with spinlock held */
 657static void snd_atiixp_check_bus_busy(struct atiixp_modem *chip)
 658{
 659        unsigned int bus_busy;
 660        if (atiixp_read(chip, CMD) & (ATI_REG_CMD_MODEM_SEND1_EN |
 661                                      ATI_REG_CMD_MODEM_RECEIVE_EN))
 662                bus_busy = ATI_REG_IER_MODEM_SET_BUS_BUSY;
 663        else
 664                bus_busy = 0;
 665        atiixp_update(chip, IER, ATI_REG_IER_MODEM_SET_BUS_BUSY, bus_busy);
 666}
 667
 668/* common trigger callback
 669 * calling the lowlevel callbacks in it
 670 */
 671static int snd_atiixp_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 672{
 673        struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 674        struct atiixp_dma *dma = substream->runtime->private_data;
 675        int err = 0;
 676
 677        if (snd_BUG_ON(!dma->ops->enable_transfer ||
 678                       !dma->ops->flush_dma))
 679                return -EINVAL;
 680
 681        spin_lock(&chip->reg_lock);
 682        switch(cmd) {
 683        case SNDRV_PCM_TRIGGER_START:
 684                dma->ops->enable_transfer(chip, 1);
 685                dma->running = 1;
 686                break;
 687        case SNDRV_PCM_TRIGGER_STOP:
 688                dma->ops->enable_transfer(chip, 0);
 689                dma->running = 0;
 690                break;
 691        default:
 692                err = -EINVAL;
 693                break;
 694        }
 695        if (! err) {
 696        snd_atiixp_check_bus_busy(chip);
 697        if (cmd == SNDRV_PCM_TRIGGER_STOP) {
 698                dma->ops->flush_dma(chip);
 699                snd_atiixp_check_bus_busy(chip);
 700        }
 701        }
 702        spin_unlock(&chip->reg_lock);
 703        return err;
 704}
 705
 706
 707/*
 708 * lowlevel callbacks for each DMA type
 709 *
 710 * every callback is supposed to be called in chip->reg_lock spinlock
 711 */
 712
 713/* flush FIFO of analog OUT DMA */
 714static void atiixp_out_flush_dma(struct atiixp_modem *chip)
 715{
 716        atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_OUT1_FLUSH);
 717}
 718
 719/* enable/disable analog OUT DMA */
 720static void atiixp_out_enable_dma(struct atiixp_modem *chip, int on)
 721{
 722        unsigned int data;
 723        data = atiixp_read(chip, CMD);
 724        if (on) {
 725                if (data & ATI_REG_CMD_MODEM_OUT_DMA1_EN)
 726                        return;
 727                atiixp_out_flush_dma(chip);
 728                data |= ATI_REG_CMD_MODEM_OUT_DMA1_EN;
 729        } else
 730                data &= ~ATI_REG_CMD_MODEM_OUT_DMA1_EN;
 731        atiixp_write(chip, CMD, data);
 732}
 733
 734/* start/stop transfer over OUT DMA */
 735static void atiixp_out_enable_transfer(struct atiixp_modem *chip, int on)
 736{
 737        atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_SEND1_EN,
 738                      on ? ATI_REG_CMD_MODEM_SEND1_EN : 0);
 739}
 740
 741/* enable/disable analog IN DMA */
 742static void atiixp_in_enable_dma(struct atiixp_modem *chip, int on)
 743{
 744        atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_IN_DMA_EN,
 745                      on ? ATI_REG_CMD_MODEM_IN_DMA_EN : 0);
 746}
 747
 748/* start/stop analog IN DMA */
 749static void atiixp_in_enable_transfer(struct atiixp_modem *chip, int on)
 750{
 751        if (on) {
 752                unsigned int data = atiixp_read(chip, CMD);
 753                if (! (data & ATI_REG_CMD_MODEM_RECEIVE_EN)) {
 754                        data |= ATI_REG_CMD_MODEM_RECEIVE_EN;
 755                        atiixp_write(chip, CMD, data);
 756                }
 757        } else
 758                atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_RECEIVE_EN, 0);
 759}
 760
 761/* flush FIFO of analog IN DMA */
 762static void atiixp_in_flush_dma(struct atiixp_modem *chip)
 763{
 764        atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_IN_FLUSH);
 765}
 766
 767/* set up slots and formats for analog OUT */
 768static int snd_atiixp_playback_prepare(struct snd_pcm_substream *substream)
 769{
 770        struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 771        unsigned int data;
 772
 773        spin_lock_irq(&chip->reg_lock);
 774        /* set output threshold */
 775        data = atiixp_read(chip, MODEM_OUT_FIFO);
 776        data &= ~ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK;
 777        data |= 0x04 << ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT;
 778        atiixp_write(chip, MODEM_OUT_FIFO, data);
 779        spin_unlock_irq(&chip->reg_lock);
 780        return 0;
 781}
 782
 783/* set up slots and formats for analog IN */
 784static int snd_atiixp_capture_prepare(struct snd_pcm_substream *substream)
 785{
 786        return 0;
 787}
 788
 789/*
 790 * hw_params - allocate the buffer and set up buffer descriptors
 791 */
 792static int snd_atiixp_pcm_hw_params(struct snd_pcm_substream *substream,
 793                                   struct snd_pcm_hw_params *hw_params)
 794{
 795        struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 796        struct atiixp_dma *dma = substream->runtime->private_data;
 797        int err;
 798        int i;
 799
 800        err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 801        if (err < 0)
 802                return err;
 803        dma->buf_addr = substream->runtime->dma_addr;
 804        dma->buf_bytes = params_buffer_bytes(hw_params);
 805
 806        err = atiixp_build_dma_packets(chip, dma, substream,
 807                                       params_periods(hw_params),
 808                                       params_period_bytes(hw_params));
 809        if (err < 0)
 810                return err;
 811
 812        /* set up modem rate */
 813        for (i = 0; i < NUM_ATI_CODECS; i++) {
 814                if (! chip->ac97[i])
 815                        continue;
 816                snd_ac97_write(chip->ac97[i], AC97_LINE1_RATE, params_rate(hw_params));
 817                snd_ac97_write(chip->ac97[i], AC97_LINE1_LEVEL, 0);
 818        }
 819
 820        return err;
 821}
 822
 823static int snd_atiixp_pcm_hw_free(struct snd_pcm_substream *substream)
 824{
 825        struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 826        struct atiixp_dma *dma = substream->runtime->private_data;
 827
 828        atiixp_clear_dma_packets(chip, dma, substream);
 829        snd_pcm_lib_free_pages(substream);
 830        return 0;
 831}
 832
 833
 834/*
 835 * pcm hardware definition, identical for all DMA types
 836 */
 837static struct snd_pcm_hardware snd_atiixp_pcm_hw =
 838{
 839        .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 840                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
 841                                 SNDRV_PCM_INFO_MMAP_VALID),
 842        .formats =              SNDRV_PCM_FMTBIT_S16_LE,
 843        .rates =                (SNDRV_PCM_RATE_8000 |
 844                                 SNDRV_PCM_RATE_16000 |
 845                                 SNDRV_PCM_RATE_KNOT),
 846        .rate_min =             8000,
 847        .rate_max =             16000,
 848        .channels_min =         2,
 849        .channels_max =         2,
 850        .buffer_bytes_max =     256 * 1024,
 851        .period_bytes_min =     32,
 852        .period_bytes_max =     128 * 1024,
 853        .periods_min =          2,
 854        .periods_max =          ATI_MAX_DESCRIPTORS,
 855};
 856
 857static int snd_atiixp_pcm_open(struct snd_pcm_substream *substream,
 858                               struct atiixp_dma *dma, int pcm_type)
 859{
 860        struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 861        struct snd_pcm_runtime *runtime = substream->runtime;
 862        int err;
 863        static unsigned int rates[] = { 8000,  9600, 12000, 16000 };
 864        static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
 865                .count = ARRAY_SIZE(rates),
 866                .list = rates,
 867                .mask = 0,
 868        };
 869
 870        if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma))
 871                return -EINVAL;
 872
 873        if (dma->opened)
 874                return -EBUSY;
 875        dma->substream = substream;
 876        runtime->hw = snd_atiixp_pcm_hw;
 877        dma->ac97_pcm_type = pcm_type;
 878        if ((err = snd_pcm_hw_constraint_list(runtime, 0,
 879                                              SNDRV_PCM_HW_PARAM_RATE,
 880                                              &hw_constraints_rates)) < 0)
 881                return err;
 882        if ((err = snd_pcm_hw_constraint_integer(runtime,
 883                                                 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 884                return err;
 885        runtime->private_data = dma;
 886
 887        /* enable DMA bits */
 888        spin_lock_irq(&chip->reg_lock);
 889        dma->ops->enable_dma(chip, 1);
 890        spin_unlock_irq(&chip->reg_lock);
 891        dma->opened = 1;
 892
 893        return 0;
 894}
 895
 896static int snd_atiixp_pcm_close(struct snd_pcm_substream *substream,
 897                                struct atiixp_dma *dma)
 898{
 899        struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 900        /* disable DMA bits */
 901        if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma))
 902                return -EINVAL;
 903        spin_lock_irq(&chip->reg_lock);
 904        dma->ops->enable_dma(chip, 0);
 905        spin_unlock_irq(&chip->reg_lock);
 906        dma->substream = NULL;
 907        dma->opened = 0;
 908        return 0;
 909}
 910
 911/*
 912 */
 913static int snd_atiixp_playback_open(struct snd_pcm_substream *substream)
 914{
 915        struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 916        int err;
 917
 918        mutex_lock(&chip->open_mutex);
 919        err = snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_PLAYBACK], 0);
 920        mutex_unlock(&chip->open_mutex);
 921        if (err < 0)
 922                return err;
 923        return 0;
 924}
 925
 926static int snd_atiixp_playback_close(struct snd_pcm_substream *substream)
 927{
 928        struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 929        int err;
 930        mutex_lock(&chip->open_mutex);
 931        err = snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_PLAYBACK]);
 932        mutex_unlock(&chip->open_mutex);
 933        return err;
 934}
 935
 936static int snd_atiixp_capture_open(struct snd_pcm_substream *substream)
 937{
 938        struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 939        return snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_CAPTURE], 1);
 940}
 941
 942static int snd_atiixp_capture_close(struct snd_pcm_substream *substream)
 943{
 944        struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 945        return snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_CAPTURE]);
 946}
 947
 948
 949/* AC97 playback */
 950static struct snd_pcm_ops snd_atiixp_playback_ops = {
 951        .open =         snd_atiixp_playback_open,
 952        .close =        snd_atiixp_playback_close,
 953        .ioctl =        snd_pcm_lib_ioctl,
 954        .hw_params =    snd_atiixp_pcm_hw_params,
 955        .hw_free =      snd_atiixp_pcm_hw_free,
 956        .prepare =      snd_atiixp_playback_prepare,
 957        .trigger =      snd_atiixp_pcm_trigger,
 958        .pointer =      snd_atiixp_pcm_pointer,
 959};
 960
 961/* AC97 capture */
 962static struct snd_pcm_ops snd_atiixp_capture_ops = {
 963        .open =         snd_atiixp_capture_open,
 964        .close =        snd_atiixp_capture_close,
 965        .ioctl =        snd_pcm_lib_ioctl,
 966        .hw_params =    snd_atiixp_pcm_hw_params,
 967        .hw_free =      snd_atiixp_pcm_hw_free,
 968        .prepare =      snd_atiixp_capture_prepare,
 969        .trigger =      snd_atiixp_pcm_trigger,
 970        .pointer =      snd_atiixp_pcm_pointer,
 971};
 972
 973static struct atiixp_dma_ops snd_atiixp_playback_dma_ops = {
 974        .type = ATI_DMA_PLAYBACK,
 975        .llp_offset = ATI_REG_MODEM_OUT_DMA1_LINKPTR,
 976        .dt_cur = ATI_REG_MODEM_OUT_DMA1_DT_CUR,
 977        .enable_dma = atiixp_out_enable_dma,
 978        .enable_transfer = atiixp_out_enable_transfer,
 979        .flush_dma = atiixp_out_flush_dma,
 980};
 981        
 982static struct atiixp_dma_ops snd_atiixp_capture_dma_ops = {
 983        .type = ATI_DMA_CAPTURE,
 984        .llp_offset = ATI_REG_MODEM_IN_DMA_LINKPTR,
 985        .dt_cur = ATI_REG_MODEM_IN_DMA_DT_CUR,
 986        .enable_dma = atiixp_in_enable_dma,
 987        .enable_transfer = atiixp_in_enable_transfer,
 988        .flush_dma = atiixp_in_flush_dma,
 989};
 990
 991static int __devinit snd_atiixp_pcm_new(struct atiixp_modem *chip)
 992{
 993        struct snd_pcm *pcm;
 994        int err;
 995
 996        /* initialize constants */
 997        chip->dmas[ATI_DMA_PLAYBACK].ops = &snd_atiixp_playback_dma_ops;
 998        chip->dmas[ATI_DMA_CAPTURE].ops = &snd_atiixp_capture_dma_ops;
 999
1000        /* PCM #0: analog I/O */
1001        err = snd_pcm_new(chip->card, "ATI IXP MC97", ATI_PCMDEV_ANALOG, 1, 1, &pcm);
1002        if (err < 0)
1003                return err;
1004        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_atiixp_playback_ops);
1005        snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_atiixp_capture_ops);
1006        pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
1007        pcm->private_data = chip;
1008        strcpy(pcm->name, "ATI IXP MC97");
1009        chip->pcmdevs[ATI_PCMDEV_ANALOG] = pcm;
1010
1011        snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
1012                                              snd_dma_pci_data(chip->pci),
1013                                              64*1024, 128*1024);
1014
1015        return 0;
1016}
1017
1018
1019
1020/*
1021 * interrupt handler
1022 */
1023static irqreturn_t snd_atiixp_interrupt(int irq, void *dev_id)
1024{
1025        struct atiixp_modem *chip = dev_id;
1026        unsigned int status;
1027
1028        status = atiixp_read(chip, ISR);
1029
1030        if (! status)
1031                return IRQ_NONE;
1032
1033        /* process audio DMA */
1034        if (status & ATI_REG_ISR_MODEM_OUT1_XRUN)
1035                snd_atiixp_xrun_dma(chip,  &chip->dmas[ATI_DMA_PLAYBACK]);
1036        else if (status & ATI_REG_ISR_MODEM_OUT1_STATUS)
1037                snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);
1038        if (status & ATI_REG_ISR_MODEM_IN_XRUN)
1039                snd_atiixp_xrun_dma(chip,  &chip->dmas[ATI_DMA_CAPTURE]);
1040        else if (status & ATI_REG_ISR_MODEM_IN_STATUS)
1041                snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);
1042
1043        /* for codec detection */
1044        if (status & CODEC_CHECK_BITS) {
1045                unsigned int detected;
1046                detected = status & CODEC_CHECK_BITS;
1047                spin_lock(&chip->reg_lock);
1048                chip->codec_not_ready_bits |= detected;
1049                atiixp_update(chip, IER, detected, 0); /* disable the detected irqs */
1050                spin_unlock(&chip->reg_lock);
1051        }
1052
1053        /* ack */
1054        atiixp_write(chip, ISR, status);
1055
1056        return IRQ_HANDLED;
1057}
1058
1059
1060/*
1061 * ac97 mixer section
1062 */
1063
1064static int __devinit snd_atiixp_mixer_new(struct atiixp_modem *chip, int clock)
1065{
1066        struct snd_ac97_bus *pbus;
1067        struct snd_ac97_template ac97;
1068        int i, err;
1069        int codec_count;
1070        static struct snd_ac97_bus_ops ops = {
1071                .write = snd_atiixp_ac97_write,
1072                .read = snd_atiixp_ac97_read,
1073        };
1074        static unsigned int codec_skip[NUM_ATI_CODECS] = {
1075                ATI_REG_ISR_CODEC0_NOT_READY,
1076                ATI_REG_ISR_CODEC1_NOT_READY,
1077                ATI_REG_ISR_CODEC2_NOT_READY,
1078        };
1079
1080        if (snd_atiixp_codec_detect(chip) < 0)
1081                return -ENXIO;
1082
1083        if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus)) < 0)
1084                return err;
1085        pbus->clock = clock;
1086        chip->ac97_bus = pbus;
1087
1088        codec_count = 0;
1089        for (i = 0; i < NUM_ATI_CODECS; i++) {
1090                if (chip->codec_not_ready_bits & codec_skip[i])
1091                        continue;
1092                memset(&ac97, 0, sizeof(ac97));
1093                ac97.private_data = chip;
1094                ac97.pci = chip->pci;
1095                ac97.num = i;
1096                ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;
1097                if ((err = snd_ac97_mixer(pbus, &ac97, &chip->ac97[i])) < 0) {
1098                        chip->ac97[i] = NULL; /* to be sure */
1099                        snd_printdd("atiixp-modem: codec %d not available for modem\n", i);
1100                        continue;
1101                }
1102                codec_count++;
1103        }
1104
1105        if (! codec_count) {
1106                snd_printk(KERN_ERR "atiixp-modem: no codec available\n");
1107                return -ENODEV;
1108        }
1109
1110        /* snd_ac97_tune_hardware(chip->ac97, ac97_quirks); */
1111
1112        return 0;
1113}
1114
1115
1116#ifdef CONFIG_PM_SLEEP
1117/*
1118 * power management
1119 */
1120static int snd_atiixp_suspend(struct device *dev)
1121{
1122        struct pci_dev *pci = to_pci_dev(dev);
1123        struct snd_card *card = dev_get_drvdata(dev);
1124        struct atiixp_modem *chip = card->private_data;
1125        int i;
1126
1127        snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1128        for (i = 0; i < NUM_ATI_PCMDEVS; i++)
1129                snd_pcm_suspend_all(chip->pcmdevs[i]);
1130        for (i = 0; i < NUM_ATI_CODECS; i++)
1131                snd_ac97_suspend(chip->ac97[i]);
1132        snd_atiixp_aclink_down(chip);
1133        snd_atiixp_chip_stop(chip);
1134
1135        pci_disable_device(pci);
1136        pci_save_state(pci);
1137        pci_set_power_state(pci, PCI_D3hot);
1138        return 0;
1139}
1140
1141static int snd_atiixp_resume(struct device *dev)
1142{
1143        struct pci_dev *pci = to_pci_dev(dev);
1144        struct snd_card *card = dev_get_drvdata(dev);
1145        struct atiixp_modem *chip = card->private_data;
1146        int i;
1147
1148        pci_set_power_state(pci, PCI_D0);
1149        pci_restore_state(pci);
1150        if (pci_enable_device(pci) < 0) {
1151                printk(KERN_ERR "atiixp-modem: pci_enable_device failed, "
1152                       "disabling device\n");
1153                snd_card_disconnect(card);
1154                return -EIO;
1155        }
1156        pci_set_master(pci);
1157
1158        snd_atiixp_aclink_reset(chip);
1159        snd_atiixp_chip_start(chip);
1160
1161        for (i = 0; i < NUM_ATI_CODECS; i++)
1162                snd_ac97_resume(chip->ac97[i]);
1163
1164        snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1165        return 0;
1166}
1167
1168static SIMPLE_DEV_PM_OPS(snd_atiixp_pm, snd_atiixp_suspend, snd_atiixp_resume);
1169#define SND_ATIIXP_PM_OPS       &snd_atiixp_pm
1170#else
1171#define SND_ATIIXP_PM_OPS       NULL
1172#endif /* CONFIG_PM_SLEEP */
1173
1174#ifdef CONFIG_PROC_FS
1175/*
1176 * proc interface for register dump
1177 */
1178
1179static void snd_atiixp_proc_read(struct snd_info_entry *entry,
1180                                 struct snd_info_buffer *buffer)
1181{
1182        struct atiixp_modem *chip = entry->private_data;
1183        int i;
1184
1185        for (i = 0; i < 256; i += 4)
1186                snd_iprintf(buffer, "%02x: %08x\n", i, readl(chip->remap_addr + i));
1187}
1188
1189static void __devinit snd_atiixp_proc_init(struct atiixp_modem *chip)
1190{
1191        struct snd_info_entry *entry;
1192
1193        if (! snd_card_proc_new(chip->card, "atiixp-modem", &entry))
1194                snd_info_set_text_ops(entry, chip, snd_atiixp_proc_read);
1195}
1196#else
1197#define snd_atiixp_proc_init(chip)
1198#endif
1199
1200
1201/*
1202 * destructor
1203 */
1204
1205static int snd_atiixp_free(struct atiixp_modem *chip)
1206{
1207        if (chip->irq < 0)
1208                goto __hw_end;
1209        snd_atiixp_chip_stop(chip);
1210
1211      __hw_end:
1212        if (chip->irq >= 0)
1213                free_irq(chip->irq, chip);
1214        if (chip->remap_addr)
1215                iounmap(chip->remap_addr);
1216        pci_release_regions(chip->pci);
1217        pci_disable_device(chip->pci);
1218        kfree(chip);
1219        return 0;
1220}
1221
1222static int snd_atiixp_dev_free(struct snd_device *device)
1223{
1224        struct atiixp_modem *chip = device->device_data;
1225        return snd_atiixp_free(chip);
1226}
1227
1228/*
1229 * constructor for chip instance
1230 */
1231static int __devinit snd_atiixp_create(struct snd_card *card,
1232                                       struct pci_dev *pci,
1233                                       struct atiixp_modem **r_chip)
1234{
1235        static struct snd_device_ops ops = {
1236                .dev_free =     snd_atiixp_dev_free,
1237        };
1238        struct atiixp_modem *chip;
1239        int err;
1240
1241        if ((err = pci_enable_device(pci)) < 0)
1242                return err;
1243
1244        chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1245        if (chip == NULL) {
1246                pci_disable_device(pci);
1247                return -ENOMEM;
1248        }
1249
1250        spin_lock_init(&chip->reg_lock);
1251        mutex_init(&chip->open_mutex);
1252        chip->card = card;
1253        chip->pci = pci;
1254        chip->irq = -1;
1255        if ((err = pci_request_regions(pci, "ATI IXP MC97")) < 0) {
1256                kfree(chip);
1257                pci_disable_device(pci);
1258                return err;
1259        }
1260        chip->addr = pci_resource_start(pci, 0);
1261        chip->remap_addr = pci_ioremap_bar(pci, 0);
1262        if (chip->remap_addr == NULL) {
1263                snd_printk(KERN_ERR "AC'97 space ioremap problem\n");
1264                snd_atiixp_free(chip);
1265                return -EIO;
1266        }
1267
1268        if (request_irq(pci->irq, snd_atiixp_interrupt, IRQF_SHARED,
1269                        KBUILD_MODNAME, chip)) {
1270                snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
1271                snd_atiixp_free(chip);
1272                return -EBUSY;
1273        }
1274        chip->irq = pci->irq;
1275        pci_set_master(pci);
1276        synchronize_irq(chip->irq);
1277
1278        if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1279                snd_atiixp_free(chip);
1280                return err;
1281        }
1282
1283        snd_card_set_dev(card, &pci->dev);
1284
1285        *r_chip = chip;
1286        return 0;
1287}
1288
1289
1290static int __devinit 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_create(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 __devexit snd_atiixp_remove(struct pci_dev *pci)
1335{
1336        snd_card_free(pci_get_drvdata(pci));
1337        pci_set_drvdata(pci, NULL);
1338}
1339
1340static struct pci_driver atiixp_modem_driver = {
1341        .name = KBUILD_MODNAME,
1342        .id_table = snd_atiixp_ids,
1343        .probe = snd_atiixp_probe,
1344        .remove = __devexit_p(snd_atiixp_remove),
1345        .driver = {
1346                .pm = SND_ATIIXP_PM_OPS,
1347        },
1348};
1349
1350module_pci_driver(atiixp_modem_driver);
1351
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