sound/pci/atiixp

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This source file includes following definitions.
snd_atiixp_update_bits
atiixp_clear_dma_packets
snd_atiixp_acquire_codec
snd_atiixp_codec_read
snd_atiixp_codec_write
snd_atiixp_ac97_read
snd_atiixp_ac97_write
snd_atiixp_aclink_reset
snd_atiixp_aclink_down
snd_atiixp_codec_detect
snd_atiixp_chip_start
snd_atiixp_chip_stop
snd_atiixp_pcm_pointer
snd_atiixp_xrun_dma
snd_atiixp_update_dma
snd_atiixp_check_bus_busy
snd_atiixp_pcm_trigger
atiixp_out_flush_dma
atiixp_out_enable_dma
atiixp_out_enable_transfer
atiixp_in_enable_dma
atiixp_in_enable_transfer
atiixp_in_flush_dma
snd_atiixp_playback_prepare
snd_atiixp_capture_prepare
snd_atiixp_pcm_hw_params
snd_atiixp_pcm_hw_free
snd_atiixp_pcm_open
snd_atiixp_pcm_close
snd_atiixp_playback_open
snd_atiixp_playback_close
snd_atiixp_capture_open
snd_atiixp_capture_close
snd_atiixp_pcm_new
snd_atiixp_interrupt
snd_atiixp_mixer_new
snd_atiixp_suspend
snd_atiixp_resume
snd_atiixp_proc_read
snd_atiixp_proc_init
snd_atiixp_free
snd_atiixp_dev_free
snd_atiixp_create
snd_atiixp_probe
snd_atiixp_remove
   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  *   ALSA driver for ATI IXP 150/200/250 AC97 modem controllers
   4  *
   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 
  23 MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
  24 MODULE_DESCRIPTION("ATI IXP MC97 controller");
  25 MODULE_LICENSE("GPL");
  26 MODULE_SUPPORTED_DEVICE("{{ATI,IXP150/200/250}}");
  27 
  28 static int index = -2; /* Exclude the first card */
  29 static char *id = SNDRV_DEFAULT_STR1;   /* ID for this card */
  30 static int ac97_clock = 48000;
  31 
  32 module_param(index, int, 0444);
  33 MODULE_PARM_DESC(index, "Index value for ATI IXP controller.");
  34 module_param(id, charp, 0444);
  35 MODULE_PARM_DESC(id, "ID string for ATI IXP controller.");
  36 module_param(ac97_clock, int, 0444);
  37 MODULE_PARM_DESC(ac97_clock, "AC'97 codec clock (default 48000Hz).");
  38 
  39 /* just for backward compatibility */
  40 static bool enable;
  41 module_param(enable, bool, 0444);
  42 
  43 
  44 /*
  45  */
  46 
  47 #define ATI_REG_ISR                     0x00    /* interrupt source */
  48 #define  ATI_REG_ISR_MODEM_IN_XRUN      (1U<<0)
  49 #define  ATI_REG_ISR_MODEM_IN_STATUS    (1U<<1)
  50 #define  ATI_REG_ISR_MODEM_OUT1_XRUN    (1U<<2)
  51 #define  ATI_REG_ISR_MODEM_OUT1_STATUS  (1U<<3)
  52 #define  ATI_REG_ISR_MODEM_OUT2_XRUN    (1U<<4)
  53 #define  ATI_REG_ISR_MODEM_OUT2_STATUS  (1U<<5)
  54 #define  ATI_REG_ISR_MODEM_OUT3_XRUN    (1U<<6)
  55 #define  ATI_REG_ISR_MODEM_OUT3_STATUS  (1U<<7)
  56 #define  ATI_REG_ISR_PHYS_INTR          (1U<<8)
  57 #define  ATI_REG_ISR_PHYS_MISMATCH      (1U<<9)
  58 #define  ATI_REG_ISR_CODEC0_NOT_READY   (1U<<10)
  59 #define  ATI_REG_ISR_CODEC1_NOT_READY   (1U<<11)
  60 #define  ATI_REG_ISR_CODEC2_NOT_READY   (1U<<12)
  61 #define  ATI_REG_ISR_NEW_FRAME          (1U<<13)
  62 #define  ATI_REG_ISR_MODEM_GPIO_DATA    (1U<<14)
  63 
  64 #define ATI_REG_IER                     0x04    /* interrupt enable */
  65 #define  ATI_REG_IER_MODEM_IN_XRUN_EN   (1U<<0)
  66 #define  ATI_REG_IER_MODEM_STATUS_EN    (1U<<1)
  67 #define  ATI_REG_IER_MODEM_OUT1_XRUN_EN (1U<<2)
  68 #define  ATI_REG_IER_MODEM_OUT2_XRUN_EN (1U<<4)
  69 #define  ATI_REG_IER_MODEM_OUT3_XRUN_EN (1U<<6)
  70 #define  ATI_REG_IER_PHYS_INTR_EN       (1U<<8)
  71 #define  ATI_REG_IER_PHYS_MISMATCH_EN   (1U<<9)
  72 #define  ATI_REG_IER_CODEC0_INTR_EN     (1U<<10)
  73 #define  ATI_REG_IER_CODEC1_INTR_EN     (1U<<11)
  74 #define  ATI_REG_IER_CODEC2_INTR_EN     (1U<<12)
  75 #define  ATI_REG_IER_NEW_FRAME_EN       (1U<<13)        /* (RO */
  76 #define  ATI_REG_IER_MODEM_GPIO_DATA_EN (1U<<14)        /* (WO) modem is running */
  77 #define  ATI_REG_IER_MODEM_SET_BUS_BUSY (1U<<15)
  78 
  79 #define ATI_REG_CMD                     0x08    /* command */
  80 #define  ATI_REG_CMD_POWERDOWN  (1U<<0)
  81 #define  ATI_REG_CMD_MODEM_RECEIVE_EN   (1U<<1) /* modem only */
  82 #define  ATI_REG_CMD_MODEM_SEND1_EN     (1U<<2) /* modem only */
  83 #define  ATI_REG_CMD_MODEM_SEND2_EN     (1U<<3) /* modem only */
  84 #define  ATI_REG_CMD_MODEM_SEND3_EN     (1U<<4) /* modem only */
  85 #define  ATI_REG_CMD_MODEM_STATUS_MEM   (1U<<5) /* modem only */
  86 #define  ATI_REG_CMD_MODEM_IN_DMA_EN    (1U<<8) /* modem only */
  87 #define  ATI_REG_CMD_MODEM_OUT_DMA1_EN  (1U<<9) /* modem only */
  88 #define  ATI_REG_CMD_MODEM_OUT_DMA2_EN  (1U<<10)        /* modem only */
  89 #define  ATI_REG_CMD_MODEM_OUT_DMA3_EN  (1U<<11)        /* modem only */
  90 #define  ATI_REG_CMD_AUDIO_PRESENT      (1U<<20)
  91 #define  ATI_REG_CMD_MODEM_GPIO_THRU_DMA        (1U<<22)        /* modem only */
  92 #define  ATI_REG_CMD_LOOPBACK_EN        (1U<<23)
  93 #define  ATI_REG_CMD_PACKED_DIS         (1U<<24)
  94 #define  ATI_REG_CMD_BURST_EN           (1U<<25)
  95 #define  ATI_REG_CMD_PANIC_EN           (1U<<26)
  96 #define  ATI_REG_CMD_MODEM_PRESENT      (1U<<27)
  97 #define  ATI_REG_CMD_ACLINK_ACTIVE      (1U<<28)
  98 #define  ATI_REG_CMD_AC_SOFT_RESET      (1U<<29)
  99 #define  ATI_REG_CMD_AC_SYNC            (1U<<30)
 100 #define  ATI_REG_CMD_AC_RESET           (1U<<31)
 101 
 102 #define ATI_REG_PHYS_OUT_ADDR           0x0c
 103 #define  ATI_REG_PHYS_OUT_CODEC_MASK    (3U<<0)
 104 #define  ATI_REG_PHYS_OUT_RW            (1U<<2)
 105 #define  ATI_REG_PHYS_OUT_ADDR_EN       (1U<<8)
 106 #define  ATI_REG_PHYS_OUT_ADDR_SHIFT    9
 107 #define  ATI_REG_PHYS_OUT_DATA_SHIFT    16
 108 
 109 #define ATI_REG_PHYS_IN_ADDR            0x10
 110 #define  ATI_REG_PHYS_IN_READ_FLAG      (1U<<8)
 111 #define  ATI_REG_PHYS_IN_ADDR_SHIFT     9
 112 #define  ATI_REG_PHYS_IN_DATA_SHIFT     16
 113 
 114 #define ATI_REG_SLOTREQ                 0x14
 115 
 116 #define ATI_REG_COUNTER                 0x18
 117 #define  ATI_REG_COUNTER_SLOT           (3U<<0) /* slot # */
 118 #define  ATI_REG_COUNTER_BITCLOCK       (31U<<8)
 119 
 120 #define ATI_REG_IN_FIFO_THRESHOLD       0x1c
 121 
 122 #define ATI_REG_MODEM_IN_DMA_LINKPTR    0x20
 123 #define ATI_REG_MODEM_IN_DMA_DT_START   0x24    /* RO */
 124 #define ATI_REG_MODEM_IN_DMA_DT_NEXT    0x28    /* RO */
 125 #define ATI_REG_MODEM_IN_DMA_DT_CUR     0x2c    /* RO */
 126 #define ATI_REG_MODEM_IN_DMA_DT_SIZE    0x30
 127 #define ATI_REG_MODEM_OUT_FIFO          0x34    /* output threshold */
 128 #define  ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK  (0xf<<16)
 129 #define  ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT 16
 130 #define ATI_REG_MODEM_OUT_DMA1_LINKPTR  0x38
 131 #define ATI_REG_MODEM_OUT_DMA2_LINKPTR  0x3c
 132 #define ATI_REG_MODEM_OUT_DMA3_LINKPTR  0x40
 133 #define ATI_REG_MODEM_OUT_DMA1_DT_START 0x44
 134 #define ATI_REG_MODEM_OUT_DMA1_DT_NEXT  0x48
 135 #define ATI_REG_MODEM_OUT_DMA1_DT_CUR   0x4c
 136 #define ATI_REG_MODEM_OUT_DMA2_DT_START 0x50
 137 #define ATI_REG_MODEM_OUT_DMA2_DT_NEXT  0x54
 138 #define ATI_REG_MODEM_OUT_DMA2_DT_CUR   0x58
 139 #define ATI_REG_MODEM_OUT_DMA3_DT_START 0x5c
 140 #define ATI_REG_MODEM_OUT_DMA3_DT_NEXT  0x60
 141 #define ATI_REG_MODEM_OUT_DMA3_DT_CUR   0x64
 142 #define ATI_REG_MODEM_OUT_DMA12_DT_SIZE 0x68
 143 #define ATI_REG_MODEM_OUT_DMA3_DT_SIZE  0x6c
 144 #define ATI_REG_MODEM_OUT_FIFO_USED     0x70
 145 #define ATI_REG_MODEM_OUT_GPIO          0x74
 146 #define  ATI_REG_MODEM_OUT_GPIO_EN         1
 147 #define  ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT 5
 148 #define ATI_REG_MODEM_IN_GPIO           0x78
 149 
 150 #define ATI_REG_MODEM_MIRROR            0x7c
 151 #define ATI_REG_AUDIO_MIRROR            0x80
 152 
 153 #define ATI_REG_MODEM_FIFO_FLUSH        0x88
 154 #define  ATI_REG_MODEM_FIFO_OUT1_FLUSH  (1U<<0)
 155 #define  ATI_REG_MODEM_FIFO_OUT2_FLUSH  (1U<<1)
 156 #define  ATI_REG_MODEM_FIFO_OUT3_FLUSH  (1U<<2)
 157 #define  ATI_REG_MODEM_FIFO_IN_FLUSH    (1U<<3)
 158 
 159 /* LINKPTR */
 160 #define  ATI_REG_LINKPTR_EN             (1U<<0)
 161 
 162 #define ATI_MAX_DESCRIPTORS     256     /* max number of descriptor packets */
 163 
 164 
 165 struct atiixp_modem;
 166 
 167 /*
 168  * DMA packate descriptor
 169  */
 170 
 171 struct atiixp_dma_desc {
 172         __le32 addr;    /* DMA buffer address */
 173         u16 status;     /* status bits */
 174         u16 size;       /* size of the packet in dwords */
 175         __le32 next;    /* address of the next packet descriptor */
 176 };
 177 
 178 /*
 179  * stream enum
 180  */
 181 enum { ATI_DMA_PLAYBACK, ATI_DMA_CAPTURE, NUM_ATI_DMAS }; /* DMAs */
 182 enum { ATI_PCM_OUT, ATI_PCM_IN, NUM_ATI_PCMS }; /* AC97 pcm slots */
 183 enum { ATI_PCMDEV_ANALOG, NUM_ATI_PCMDEVS }; /* pcm devices */
 184 
 185 #define NUM_ATI_CODECS  3
 186 
 187 
 188 /*
 189  * constants and callbacks for each DMA type
 190  */
 191 struct atiixp_dma_ops {
 192         int type;                       /* ATI_DMA_XXX */
 193         unsigned int llp_offset;        /* LINKPTR offset */
 194         unsigned int dt_cur;            /* DT_CUR offset */
 195         /* called from open callback */
 196         void (*enable_dma)(struct atiixp_modem *chip, int on);
 197         /* called from trigger (START/STOP) */
 198         void (*enable_transfer)(struct atiixp_modem *chip, int on);
 199         /* called from trigger (STOP only) */
 200         void (*flush_dma)(struct atiixp_modem *chip);
 201 };
 202 
 203 /*
 204  * DMA stream
 205  */
 206 struct atiixp_dma {
 207         const struct atiixp_dma_ops *ops;
 208         struct snd_dma_buffer desc_buf;
 209         struct snd_pcm_substream *substream;    /* assigned PCM substream */
 210         unsigned int buf_addr, buf_bytes;       /* DMA buffer address, bytes */
 211         unsigned int period_bytes, periods;
 212         int opened;
 213         int running;
 214         int pcm_open_flag;
 215         int ac97_pcm_type;      /* index # of ac97_pcm to access, -1 = not used */
 216 };
 217 
 218 /*
 219  * ATI IXP chip
 220  */
 221 struct atiixp_modem {
 222         struct snd_card *card;
 223         struct pci_dev *pci;
 224 
 225         struct resource *res;           /* memory i/o */
 226         unsigned long addr;
 227         void __iomem *remap_addr;
 228         int irq;
 229         
 230         struct snd_ac97_bus *ac97_bus;
 231         struct snd_ac97 *ac97[NUM_ATI_CODECS];
 232 
 233         spinlock_t reg_lock;
 234 
 235         struct atiixp_dma dmas[NUM_ATI_DMAS];
 236         struct ac97_pcm *pcms[NUM_ATI_PCMS];
 237         struct snd_pcm *pcmdevs[NUM_ATI_PCMDEVS];
 238 
 239         int max_channels;               /* max. channels for PCM out */
 240 
 241         unsigned int codec_not_ready_bits;      /* for codec detection */
 242 
 243         int spdif_over_aclink;          /* passed from the module option */
 244         struct mutex open_mutex;        /* playback open mutex */
 245 };
 246 
 247 
 248 /*
 249  */
 250 static const struct pci_device_id snd_atiixp_ids[] = {
 251         { PCI_VDEVICE(ATI, 0x434d), 0 }, /* SB200 */
 252         { PCI_VDEVICE(ATI, 0x4378), 0 }, /* SB400 */
 253         { 0, }
 254 };
 255 
 256 MODULE_DEVICE_TABLE(pci, snd_atiixp_ids);
 257 
 258 
 259 /*
 260  * lowlevel functions
 261  */
 262 
 263 /*
 264  * update the bits of the given register.
 265  * return 1 if the bits changed.
 266  */
 267 static int snd_atiixp_update_bits(struct atiixp_modem *chip, unsigned int reg,
 268                                   unsigned int mask, unsigned int value)
 269 {
 270         void __iomem *addr = chip->remap_addr + reg;
 271         unsigned int data, old_data;
 272         old_data = data = readl(addr);
 273         data &= ~mask;
 274         data |= value;
 275         if (old_data == data)
 276                 return 0;
 277         writel(data, addr);
 278         return 1;
 279 }
 280 
 281 /*
 282  * macros for easy use
 283  */
 284 #define atiixp_write(chip,reg,value) \
 285         writel(value, chip->remap_addr + ATI_REG_##reg)
 286 #define atiixp_read(chip,reg) \
 287         readl(chip->remap_addr + ATI_REG_##reg)
 288 #define atiixp_update(chip,reg,mask,val) \
 289         snd_atiixp_update_bits(chip, ATI_REG_##reg, mask, val)
 290 
 291 /*
 292  * handling DMA packets
 293  *
 294  * we allocate a linear buffer for the DMA, and split it to  each packet.
 295  * in a future version, a scatter-gather buffer should be implemented.
 296  */
 297 
 298 #define ATI_DESC_LIST_SIZE \
 299         PAGE_ALIGN(ATI_MAX_DESCRIPTORS * sizeof(struct atiixp_dma_desc))
 300 
 301 /*
 302  * build packets ring for the given buffer size.
 303  *
 304  * IXP handles the buffer descriptors, which are connected as a linked
 305  * list.  although we can change the list dynamically, in this version,
 306  * a static RING of buffer descriptors is used.
 307  *
 308  * the ring is built in this function, and is set up to the hardware. 
 309  */
 310 static int atiixp_build_dma_packets(struct atiixp_modem *chip,
 311                                     struct atiixp_dma *dma,
 312                                     struct snd_pcm_substream *substream,
 313                                     unsigned int periods,
 314                                     unsigned int period_bytes)
 315 {
 316         unsigned int i;
 317         u32 addr, desc_addr;
 318         unsigned long flags;
 319 
 320         if (periods > ATI_MAX_DESCRIPTORS)
 321                 return -ENOMEM;
 322 
 323         if (dma->desc_buf.area == NULL) {
 324                 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(chip->pci),
 325                                         ATI_DESC_LIST_SIZE, &dma->desc_buf) < 0)
 326                         return -ENOMEM;
 327                 dma->period_bytes = dma->periods = 0; /* clear */
 328         }
 329 
 330         if (dma->periods == periods && dma->period_bytes == period_bytes)
 331                 return 0;
 332 
 333         /* reset DMA before changing the descriptor table */
 334         spin_lock_irqsave(&chip->reg_lock, flags);
 335         writel(0, chip->remap_addr + dma->ops->llp_offset);
 336         dma->ops->enable_dma(chip, 0);
 337         dma->ops->enable_dma(chip, 1);
 338         spin_unlock_irqrestore(&chip->reg_lock, flags);
 339 
 340         /* fill the entries */
 341         addr = (u32)substream->runtime->dma_addr;
 342         desc_addr = (u32)dma->desc_buf.addr;
 343         for (i = 0; i < periods; i++) {
 344                 struct atiixp_dma_desc *desc;
 345                 desc = &((struct atiixp_dma_desc *)dma->desc_buf.area)[i];
 346                 desc->addr = cpu_to_le32(addr);
 347                 desc->status = 0;
 348                 desc->size = period_bytes >> 2; /* in dwords */
 349                 desc_addr += sizeof(struct atiixp_dma_desc);
 350                 if (i == periods - 1)
 351                         desc->next = cpu_to_le32((u32)dma->desc_buf.addr);
 352                 else
 353                         desc->next = cpu_to_le32(desc_addr);
 354                 addr += period_bytes;
 355         }
 356 
 357         writel((u32)dma->desc_buf.addr | ATI_REG_LINKPTR_EN,
 358                chip->remap_addr + dma->ops->llp_offset);
 359 
 360         dma->period_bytes = period_bytes;
 361         dma->periods = periods;
 362 
 363         return 0;
 364 }
 365 
 366 /*
 367  * remove the ring buffer and release it if assigned
 368  */
 369 static void atiixp_clear_dma_packets(struct atiixp_modem *chip,
 370                                      struct atiixp_dma *dma,
 371                                      struct snd_pcm_substream *substream)
 372 {
 373         if (dma->desc_buf.area) {
 374                 writel(0, chip->remap_addr + dma->ops->llp_offset);
 375                 snd_dma_free_pages(&dma->desc_buf);
 376                 dma->desc_buf.area = NULL;
 377         }
 378 }
 379 
 380 /*
 381  * AC97 interface
 382  */
 383 static int snd_atiixp_acquire_codec(struct atiixp_modem *chip)
 384 {
 385         int timeout = 1000;
 386 
 387         while (atiixp_read(chip, PHYS_OUT_ADDR) & ATI_REG_PHYS_OUT_ADDR_EN) {
 388                 if (! timeout--) {
 389                         dev_warn(chip->card->dev, "codec acquire timeout\n");
 390                         return -EBUSY;
 391                 }
 392                 udelay(1);
 393         }
 394         return 0;
 395 }
 396 
 397 static unsigned short snd_atiixp_codec_read(struct atiixp_modem *chip,
 398                                             unsigned short codec,
 399                                             unsigned short reg)
 400 {
 401         unsigned int data;
 402         int timeout;
 403 
 404         if (snd_atiixp_acquire_codec(chip) < 0)
 405                 return 0xffff;
 406         data = (reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) |
 407                 ATI_REG_PHYS_OUT_ADDR_EN |
 408                 ATI_REG_PHYS_OUT_RW |
 409                 codec;
 410         atiixp_write(chip, PHYS_OUT_ADDR, data);
 411         if (snd_atiixp_acquire_codec(chip) < 0)
 412                 return 0xffff;
 413         timeout = 1000;
 414         do {
 415                 data = atiixp_read(chip, PHYS_IN_ADDR);
 416                 if (data & ATI_REG_PHYS_IN_READ_FLAG)
 417                         return data >> ATI_REG_PHYS_IN_DATA_SHIFT;
 418                 udelay(1);
 419         } while (--timeout);
 420         /* time out may happen during reset */
 421         if (reg < 0x7c)
 422                 dev_warn(chip->card->dev, "codec read timeout (reg %x)\n", reg);
 423         return 0xffff;
 424 }
 425 
 426 
 427 static void snd_atiixp_codec_write(struct atiixp_modem *chip,
 428                                    unsigned short codec,
 429                                    unsigned short reg, unsigned short val)
 430 {
 431         unsigned int data;
 432     
 433         if (snd_atiixp_acquire_codec(chip) < 0)
 434                 return;
 435         data = ((unsigned int)val << ATI_REG_PHYS_OUT_DATA_SHIFT) |
 436                 ((unsigned int)reg << ATI_REG_PHYS_OUT_ADDR_SHIFT) |
 437                 ATI_REG_PHYS_OUT_ADDR_EN | codec;
 438         atiixp_write(chip, PHYS_OUT_ADDR, data);
 439 }
 440 
 441 
 442 static unsigned short snd_atiixp_ac97_read(struct snd_ac97 *ac97,
 443                                            unsigned short reg)
 444 {
 445         struct atiixp_modem *chip = ac97->private_data;
 446         return snd_atiixp_codec_read(chip, ac97->num, reg);
 447     
 448 }
 449 
 450 static void snd_atiixp_ac97_write(struct snd_ac97 *ac97, unsigned short reg,
 451                                   unsigned short val)
 452 {
 453         struct atiixp_modem *chip = ac97->private_data;
 454         if (reg == AC97_GPIO_STATUS) {
 455                 atiixp_write(chip, MODEM_OUT_GPIO,
 456                         (val << ATI_REG_MODEM_OUT_GPIO_DATA_SHIFT) | ATI_REG_MODEM_OUT_GPIO_EN);
 457                 return;
 458         }
 459         snd_atiixp_codec_write(chip, ac97->num, reg, val);
 460 }
 461 
 462 /*
 463  * reset AC link
 464  */
 465 static int snd_atiixp_aclink_reset(struct atiixp_modem *chip)
 466 {
 467         int timeout;
 468 
 469         /* reset powerdoewn */
 470         if (atiixp_update(chip, CMD, ATI_REG_CMD_POWERDOWN, 0))
 471                 udelay(10);
 472 
 473         /* perform a software reset */
 474         atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, ATI_REG_CMD_AC_SOFT_RESET);
 475         atiixp_read(chip, CMD);
 476         udelay(10);
 477         atiixp_update(chip, CMD, ATI_REG_CMD_AC_SOFT_RESET, 0);
 478     
 479         timeout = 10;
 480         while (! (atiixp_read(chip, CMD) & ATI_REG_CMD_ACLINK_ACTIVE)) {
 481                 /* do a hard reset */
 482                 atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET,
 483                               ATI_REG_CMD_AC_SYNC);
 484                 atiixp_read(chip, CMD);
 485                 msleep(1);
 486                 atiixp_update(chip, CMD, ATI_REG_CMD_AC_RESET, ATI_REG_CMD_AC_RESET);
 487                 if (!--timeout) {
 488                         dev_err(chip->card->dev, "codec reset timeout\n");
 489                         break;
 490                 }
 491         }
 492 
 493         /* deassert RESET and assert SYNC to make sure */
 494         atiixp_update(chip, CMD, ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET,
 495                       ATI_REG_CMD_AC_SYNC|ATI_REG_CMD_AC_RESET);
 496 
 497         return 0;
 498 }
 499 
 500 #ifdef CONFIG_PM_SLEEP
 501 static int snd_atiixp_aclink_down(struct atiixp_modem *chip)
 502 {
 503         // if (atiixp_read(chip, MODEM_MIRROR) & 0x1) /* modem running, too? */
 504         //      return -EBUSY;
 505         atiixp_update(chip, CMD,
 506                      ATI_REG_CMD_POWERDOWN | ATI_REG_CMD_AC_RESET,
 507                      ATI_REG_CMD_POWERDOWN);
 508         return 0;
 509 }
 510 #endif
 511 
 512 /*
 513  * auto-detection of codecs
 514  *
 515  * the IXP chip can generate interrupts for the non-existing codecs.
 516  * NEW_FRAME interrupt is used to make sure that the interrupt is generated
 517  * even if all three codecs are connected.
 518  */
 519 
 520 #define ALL_CODEC_NOT_READY \
 521             (ATI_REG_ISR_CODEC0_NOT_READY |\
 522              ATI_REG_ISR_CODEC1_NOT_READY |\
 523              ATI_REG_ISR_CODEC2_NOT_READY)
 524 #define CODEC_CHECK_BITS (ALL_CODEC_NOT_READY|ATI_REG_ISR_NEW_FRAME)
 525 
 526 static int snd_atiixp_codec_detect(struct atiixp_modem *chip)
 527 {
 528         int timeout;
 529 
 530         chip->codec_not_ready_bits = 0;
 531         atiixp_write(chip, IER, CODEC_CHECK_BITS);
 532         /* wait for the interrupts */
 533         timeout = 50;
 534         while (timeout-- > 0) {
 535                 msleep(1);
 536                 if (chip->codec_not_ready_bits)
 537                         break;
 538         }
 539         atiixp_write(chip, IER, 0); /* disable irqs */
 540 
 541         if ((chip->codec_not_ready_bits & ALL_CODEC_NOT_READY) == ALL_CODEC_NOT_READY) {
 542                 dev_err(chip->card->dev, "no codec detected!\n");
 543                 return -ENXIO;
 544         }
 545         return 0;
 546 }
 547 
 548 
 549 /*
 550  * enable DMA and irqs
 551  */
 552 static int snd_atiixp_chip_start(struct atiixp_modem *chip)
 553 {
 554         unsigned int reg;
 555 
 556         /* set up spdif, enable burst mode */
 557         reg = atiixp_read(chip, CMD);
 558         reg |= ATI_REG_CMD_BURST_EN;
 559         if(!(reg & ATI_REG_CMD_MODEM_PRESENT))
 560                 reg |= ATI_REG_CMD_MODEM_PRESENT;
 561         atiixp_write(chip, CMD, reg);
 562 
 563         /* clear all interrupt source */
 564         atiixp_write(chip, ISR, 0xffffffff);
 565         /* enable irqs */
 566         atiixp_write(chip, IER,
 567                      ATI_REG_IER_MODEM_STATUS_EN |
 568                      ATI_REG_IER_MODEM_IN_XRUN_EN |
 569                      ATI_REG_IER_MODEM_OUT1_XRUN_EN);
 570         return 0;
 571 }
 572 
 573 
 574 /*
 575  * disable DMA and IRQs
 576  */
 577 static int snd_atiixp_chip_stop(struct atiixp_modem *chip)
 578 {
 579         /* clear interrupt source */
 580         atiixp_write(chip, ISR, atiixp_read(chip, ISR));
 581         /* disable irqs */
 582         atiixp_write(chip, IER, 0);
 583         return 0;
 584 }
 585 
 586 
 587 /*
 588  * PCM section
 589  */
 590 
 591 /*
 592  * pointer callback simplly reads XXX_DMA_DT_CUR register as the current
 593  * position.  when SG-buffer is implemented, the offset must be calculated
 594  * correctly...
 595  */
 596 static snd_pcm_uframes_t snd_atiixp_pcm_pointer(struct snd_pcm_substream *substream)
 597 {
 598         struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 599         struct snd_pcm_runtime *runtime = substream->runtime;
 600         struct atiixp_dma *dma = runtime->private_data;
 601         unsigned int curptr;
 602         int timeout = 1000;
 603 
 604         while (timeout--) {
 605                 curptr = readl(chip->remap_addr + dma->ops->dt_cur);
 606                 if (curptr < dma->buf_addr)
 607                         continue;
 608                 curptr -= dma->buf_addr;
 609                 if (curptr >= dma->buf_bytes)
 610                         continue;
 611                 return bytes_to_frames(runtime, curptr);
 612         }
 613         dev_dbg(chip->card->dev, "invalid DMA pointer read 0x%x (buf=%x)\n",
 614                    readl(chip->remap_addr + dma->ops->dt_cur), dma->buf_addr);
 615         return 0;
 616 }
 617 
 618 /*
 619  * XRUN detected, and stop the PCM substream
 620  */
 621 static void snd_atiixp_xrun_dma(struct atiixp_modem *chip,
 622                                 struct atiixp_dma *dma)
 623 {
 624         if (! dma->substream || ! dma->running)
 625                 return;
 626         dev_dbg(chip->card->dev, "XRUN detected (DMA %d)\n", dma->ops->type);
 627         snd_pcm_stop_xrun(dma->substream);
 628 }
 629 
 630 /*
 631  * the period ack.  update the substream.
 632  */
 633 static void snd_atiixp_update_dma(struct atiixp_modem *chip,
 634                                   struct atiixp_dma *dma)
 635 {
 636         if (! dma->substream || ! dma->running)
 637                 return;
 638         snd_pcm_period_elapsed(dma->substream);
 639 }
 640 
 641 /* set BUS_BUSY interrupt bit if any DMA is running */
 642 /* call with spinlock held */
 643 static void snd_atiixp_check_bus_busy(struct atiixp_modem *chip)
 644 {
 645         unsigned int bus_busy;
 646         if (atiixp_read(chip, CMD) & (ATI_REG_CMD_MODEM_SEND1_EN |
 647                                       ATI_REG_CMD_MODEM_RECEIVE_EN))
 648                 bus_busy = ATI_REG_IER_MODEM_SET_BUS_BUSY;
 649         else
 650                 bus_busy = 0;
 651         atiixp_update(chip, IER, ATI_REG_IER_MODEM_SET_BUS_BUSY, bus_busy);
 652 }
 653 
 654 /* common trigger callback
 655  * calling the lowlevel callbacks in it
 656  */
 657 static int snd_atiixp_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
 658 {
 659         struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 660         struct atiixp_dma *dma = substream->runtime->private_data;
 661         int err = 0;
 662 
 663         if (snd_BUG_ON(!dma->ops->enable_transfer ||
 664                        !dma->ops->flush_dma))
 665                 return -EINVAL;
 666 
 667         spin_lock(&chip->reg_lock);
 668         switch(cmd) {
 669         case SNDRV_PCM_TRIGGER_START:
 670                 dma->ops->enable_transfer(chip, 1);
 671                 dma->running = 1;
 672                 break;
 673         case SNDRV_PCM_TRIGGER_STOP:
 674                 dma->ops->enable_transfer(chip, 0);
 675                 dma->running = 0;
 676                 break;
 677         default:
 678                 err = -EINVAL;
 679                 break;
 680         }
 681         if (! err) {
 682         snd_atiixp_check_bus_busy(chip);
 683         if (cmd == SNDRV_PCM_TRIGGER_STOP) {
 684                 dma->ops->flush_dma(chip);
 685                 snd_atiixp_check_bus_busy(chip);
 686         }
 687         }
 688         spin_unlock(&chip->reg_lock);
 689         return err;
 690 }
 691 
 692 
 693 /*
 694  * lowlevel callbacks for each DMA type
 695  *
 696  * every callback is supposed to be called in chip->reg_lock spinlock
 697  */
 698 
 699 /* flush FIFO of analog OUT DMA */
 700 static void atiixp_out_flush_dma(struct atiixp_modem *chip)
 701 {
 702         atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_OUT1_FLUSH);
 703 }
 704 
 705 /* enable/disable analog OUT DMA */
 706 static void atiixp_out_enable_dma(struct atiixp_modem *chip, int on)
 707 {
 708         unsigned int data;
 709         data = atiixp_read(chip, CMD);
 710         if (on) {
 711                 if (data & ATI_REG_CMD_MODEM_OUT_DMA1_EN)
 712                         return;
 713                 atiixp_out_flush_dma(chip);
 714                 data |= ATI_REG_CMD_MODEM_OUT_DMA1_EN;
 715         } else
 716                 data &= ~ATI_REG_CMD_MODEM_OUT_DMA1_EN;
 717         atiixp_write(chip, CMD, data);
 718 }
 719 
 720 /* start/stop transfer over OUT DMA */
 721 static void atiixp_out_enable_transfer(struct atiixp_modem *chip, int on)
 722 {
 723         atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_SEND1_EN,
 724                       on ? ATI_REG_CMD_MODEM_SEND1_EN : 0);
 725 }
 726 
 727 /* enable/disable analog IN DMA */
 728 static void atiixp_in_enable_dma(struct atiixp_modem *chip, int on)
 729 {
 730         atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_IN_DMA_EN,
 731                       on ? ATI_REG_CMD_MODEM_IN_DMA_EN : 0);
 732 }
 733 
 734 /* start/stop analog IN DMA */
 735 static void atiixp_in_enable_transfer(struct atiixp_modem *chip, int on)
 736 {
 737         if (on) {
 738                 unsigned int data = atiixp_read(chip, CMD);
 739                 if (! (data & ATI_REG_CMD_MODEM_RECEIVE_EN)) {
 740                         data |= ATI_REG_CMD_MODEM_RECEIVE_EN;
 741                         atiixp_write(chip, CMD, data);
 742                 }
 743         } else
 744                 atiixp_update(chip, CMD, ATI_REG_CMD_MODEM_RECEIVE_EN, 0);
 745 }
 746 
 747 /* flush FIFO of analog IN DMA */
 748 static void atiixp_in_flush_dma(struct atiixp_modem *chip)
 749 {
 750         atiixp_write(chip, MODEM_FIFO_FLUSH, ATI_REG_MODEM_FIFO_IN_FLUSH);
 751 }
 752 
 753 /* set up slots and formats for analog OUT */
 754 static int snd_atiixp_playback_prepare(struct snd_pcm_substream *substream)
 755 {
 756         struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 757         unsigned int data;
 758 
 759         spin_lock_irq(&chip->reg_lock);
 760         /* set output threshold */
 761         data = atiixp_read(chip, MODEM_OUT_FIFO);
 762         data &= ~ATI_REG_MODEM_OUT1_DMA_THRESHOLD_MASK;
 763         data |= 0x04 << ATI_REG_MODEM_OUT1_DMA_THRESHOLD_SHIFT;
 764         atiixp_write(chip, MODEM_OUT_FIFO, data);
 765         spin_unlock_irq(&chip->reg_lock);
 766         return 0;
 767 }
 768 
 769 /* set up slots and formats for analog IN */
 770 static int snd_atiixp_capture_prepare(struct snd_pcm_substream *substream)
 771 {
 772         return 0;
 773 }
 774 
 775 /*
 776  * hw_params - allocate the buffer and set up buffer descriptors
 777  */
 778 static int snd_atiixp_pcm_hw_params(struct snd_pcm_substream *substream,
 779                                    struct snd_pcm_hw_params *hw_params)
 780 {
 781         struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 782         struct atiixp_dma *dma = substream->runtime->private_data;
 783         int err;
 784         int i;
 785 
 786         err = snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
 787         if (err < 0)
 788                 return err;
 789         dma->buf_addr = substream->runtime->dma_addr;
 790         dma->buf_bytes = params_buffer_bytes(hw_params);
 791 
 792         err = atiixp_build_dma_packets(chip, dma, substream,
 793                                        params_periods(hw_params),
 794                                        params_period_bytes(hw_params));
 795         if (err < 0)
 796                 return err;
 797 
 798         /* set up modem rate */
 799         for (i = 0; i < NUM_ATI_CODECS; i++) {
 800                 if (! chip->ac97[i])
 801                         continue;
 802                 snd_ac97_write(chip->ac97[i], AC97_LINE1_RATE, params_rate(hw_params));
 803                 snd_ac97_write(chip->ac97[i], AC97_LINE1_LEVEL, 0);
 804         }
 805 
 806         return err;
 807 }
 808 
 809 static int snd_atiixp_pcm_hw_free(struct snd_pcm_substream *substream)
 810 {
 811         struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 812         struct atiixp_dma *dma = substream->runtime->private_data;
 813 
 814         atiixp_clear_dma_packets(chip, dma, substream);
 815         snd_pcm_lib_free_pages(substream);
 816         return 0;
 817 }
 818 
 819 
 820 /*
 821  * pcm hardware definition, identical for all DMA types
 822  */
 823 static const struct snd_pcm_hardware snd_atiixp_pcm_hw =
 824 {
 825         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 826                                  SNDRV_PCM_INFO_BLOCK_TRANSFER |
 827                                  SNDRV_PCM_INFO_MMAP_VALID),
 828         .formats =              SNDRV_PCM_FMTBIT_S16_LE,
 829         .rates =                (SNDRV_PCM_RATE_8000 |
 830                                  SNDRV_PCM_RATE_16000 |
 831                                  SNDRV_PCM_RATE_KNOT),
 832         .rate_min =             8000,
 833         .rate_max =             16000,
 834         .channels_min =         2,
 835         .channels_max =         2,
 836         .buffer_bytes_max =     256 * 1024,
 837         .period_bytes_min =     32,
 838         .period_bytes_max =     128 * 1024,
 839         .periods_min =          2,
 840         .periods_max =          ATI_MAX_DESCRIPTORS,
 841 };
 842 
 843 static int snd_atiixp_pcm_open(struct snd_pcm_substream *substream,
 844                                struct atiixp_dma *dma, int pcm_type)
 845 {
 846         struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 847         struct snd_pcm_runtime *runtime = substream->runtime;
 848         int err;
 849         static const unsigned int rates[] = { 8000,  9600, 12000, 16000 };
 850         static const struct snd_pcm_hw_constraint_list hw_constraints_rates = {
 851                 .count = ARRAY_SIZE(rates),
 852                 .list = rates,
 853                 .mask = 0,
 854         };
 855 
 856         if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma))
 857                 return -EINVAL;
 858 
 859         if (dma->opened)
 860                 return -EBUSY;
 861         dma->substream = substream;
 862         runtime->hw = snd_atiixp_pcm_hw;
 863         dma->ac97_pcm_type = pcm_type;
 864         if ((err = snd_pcm_hw_constraint_list(runtime, 0,
 865                                               SNDRV_PCM_HW_PARAM_RATE,
 866                                               &hw_constraints_rates)) < 0)
 867                 return err;
 868         if ((err = snd_pcm_hw_constraint_integer(runtime,
 869                                                  SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 870                 return err;
 871         runtime->private_data = dma;
 872 
 873         /* enable DMA bits */
 874         spin_lock_irq(&chip->reg_lock);
 875         dma->ops->enable_dma(chip, 1);
 876         spin_unlock_irq(&chip->reg_lock);
 877         dma->opened = 1;
 878 
 879         return 0;
 880 }
 881 
 882 static int snd_atiixp_pcm_close(struct snd_pcm_substream *substream,
 883                                 struct atiixp_dma *dma)
 884 {
 885         struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 886         /* disable DMA bits */
 887         if (snd_BUG_ON(!dma->ops || !dma->ops->enable_dma))
 888                 return -EINVAL;
 889         spin_lock_irq(&chip->reg_lock);
 890         dma->ops->enable_dma(chip, 0);
 891         spin_unlock_irq(&chip->reg_lock);
 892         dma->substream = NULL;
 893         dma->opened = 0;
 894         return 0;
 895 }
 896 
 897 /*
 898  */
 899 static int snd_atiixp_playback_open(struct snd_pcm_substream *substream)
 900 {
 901         struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 902         int err;
 903 
 904         mutex_lock(&chip->open_mutex);
 905         err = snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_PLAYBACK], 0);
 906         mutex_unlock(&chip->open_mutex);
 907         if (err < 0)
 908                 return err;
 909         return 0;
 910 }
 911 
 912 static int snd_atiixp_playback_close(struct snd_pcm_substream *substream)
 913 {
 914         struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 915         int err;
 916         mutex_lock(&chip->open_mutex);
 917         err = snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_PLAYBACK]);
 918         mutex_unlock(&chip->open_mutex);
 919         return err;
 920 }
 921 
 922 static int snd_atiixp_capture_open(struct snd_pcm_substream *substream)
 923 {
 924         struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 925         return snd_atiixp_pcm_open(substream, &chip->dmas[ATI_DMA_CAPTURE], 1);
 926 }
 927 
 928 static int snd_atiixp_capture_close(struct snd_pcm_substream *substream)
 929 {
 930         struct atiixp_modem *chip = snd_pcm_substream_chip(substream);
 931         return snd_atiixp_pcm_close(substream, &chip->dmas[ATI_DMA_CAPTURE]);
 932 }
 933 
 934 
 935 /* AC97 playback */
 936 static const struct snd_pcm_ops snd_atiixp_playback_ops = {
 937         .open =         snd_atiixp_playback_open,
 938         .close =        snd_atiixp_playback_close,
 939         .ioctl =        snd_pcm_lib_ioctl,
 940         .hw_params =    snd_atiixp_pcm_hw_params,
 941         .hw_free =      snd_atiixp_pcm_hw_free,
 942         .prepare =      snd_atiixp_playback_prepare,
 943         .trigger =      snd_atiixp_pcm_trigger,
 944         .pointer =      snd_atiixp_pcm_pointer,
 945 };
 946 
 947 /* AC97 capture */
 948 static const struct snd_pcm_ops snd_atiixp_capture_ops = {
 949         .open =         snd_atiixp_capture_open,
 950         .close =        snd_atiixp_capture_close,
 951         .ioctl =        snd_pcm_lib_ioctl,
 952         .hw_params =    snd_atiixp_pcm_hw_params,
 953         .hw_free =      snd_atiixp_pcm_hw_free,
 954         .prepare =      snd_atiixp_capture_prepare,
 955         .trigger =      snd_atiixp_pcm_trigger,
 956         .pointer =      snd_atiixp_pcm_pointer,
 957 };
 958 
 959 static const struct atiixp_dma_ops snd_atiixp_playback_dma_ops = {
 960         .type = ATI_DMA_PLAYBACK,
 961         .llp_offset = ATI_REG_MODEM_OUT_DMA1_LINKPTR,
 962         .dt_cur = ATI_REG_MODEM_OUT_DMA1_DT_CUR,
 963         .enable_dma = atiixp_out_enable_dma,
 964         .enable_transfer = atiixp_out_enable_transfer,
 965         .flush_dma = atiixp_out_flush_dma,
 966 };
 967         
 968 static const struct atiixp_dma_ops snd_atiixp_capture_dma_ops = {
 969         .type = ATI_DMA_CAPTURE,
 970         .llp_offset = ATI_REG_MODEM_IN_DMA_LINKPTR,
 971         .dt_cur = ATI_REG_MODEM_IN_DMA_DT_CUR,
 972         .enable_dma = atiixp_in_enable_dma,
 973         .enable_transfer = atiixp_in_enable_transfer,
 974         .flush_dma = atiixp_in_flush_dma,
 975 };
 976 
 977 static int snd_atiixp_pcm_new(struct atiixp_modem *chip)
 978 {
 979         struct snd_pcm *pcm;
 980         int err;
 981 
 982         /* initialize constants */
 983         chip->dmas[ATI_DMA_PLAYBACK].ops = &snd_atiixp_playback_dma_ops;
 984         chip->dmas[ATI_DMA_CAPTURE].ops = &snd_atiixp_capture_dma_ops;
 985 
 986         /* PCM #0: analog I/O */
 987         err = snd_pcm_new(chip->card, "ATI IXP MC97", ATI_PCMDEV_ANALOG, 1, 1, &pcm);
 988         if (err < 0)
 989                 return err;
 990         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_atiixp_playback_ops);
 991         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_atiixp_capture_ops);
 992         pcm->dev_class = SNDRV_PCM_CLASS_MODEM;
 993         pcm->private_data = chip;
 994         strcpy(pcm->name, "ATI IXP MC97");
 995         chip->pcmdevs[ATI_PCMDEV_ANALOG] = pcm;
 996 
 997         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 998                                               snd_dma_pci_data(chip->pci),
 999                                               64*1024, 128*1024);
1000 
1001         return 0;
1002 }
1003 
1004 
1005 
1006 /*
1007  * interrupt handler
1008  */
1009 static irqreturn_t snd_atiixp_interrupt(int irq, void *dev_id)
1010 {
1011         struct atiixp_modem *chip = dev_id;
1012         unsigned int status;
1013 
1014         status = atiixp_read(chip, ISR);
1015 
1016         if (! status)
1017                 return IRQ_NONE;
1018 
1019         /* process audio DMA */
1020         if (status & ATI_REG_ISR_MODEM_OUT1_XRUN)
1021                 snd_atiixp_xrun_dma(chip,  &chip->dmas[ATI_DMA_PLAYBACK]);
1022         else if (status & ATI_REG_ISR_MODEM_OUT1_STATUS)
1023                 snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_PLAYBACK]);
1024         if (status & ATI_REG_ISR_MODEM_IN_XRUN)
1025                 snd_atiixp_xrun_dma(chip,  &chip->dmas[ATI_DMA_CAPTURE]);
1026         else if (status & ATI_REG_ISR_MODEM_IN_STATUS)
1027                 snd_atiixp_update_dma(chip, &chip->dmas[ATI_DMA_CAPTURE]);
1028 
1029         /* for codec detection */
1030         if (status & CODEC_CHECK_BITS) {
1031                 unsigned int detected;
1032                 detected = status & CODEC_CHECK_BITS;
1033                 spin_lock(&chip->reg_lock);
1034                 chip->codec_not_ready_bits |= detected;
1035                 atiixp_update(chip, IER, detected, 0); /* disable the detected irqs */
1036                 spin_unlock(&chip->reg_lock);
1037         }
1038 
1039         /* ack */
1040         atiixp_write(chip, ISR, status);
1041 
1042         return IRQ_HANDLED;
1043 }
1044 
1045 
1046 /*
1047  * ac97 mixer section
1048  */
1049 
1050 static int snd_atiixp_mixer_new(struct atiixp_modem *chip, int clock)
1051 {
1052         struct snd_ac97_bus *pbus;
1053         struct snd_ac97_template ac97;
1054         int i, err;
1055         int codec_count;
1056         static struct snd_ac97_bus_ops ops = {
1057                 .write = snd_atiixp_ac97_write,
1058                 .read = snd_atiixp_ac97_read,
1059         };
1060         static unsigned int codec_skip[NUM_ATI_CODECS] = {
1061                 ATI_REG_ISR_CODEC0_NOT_READY,
1062                 ATI_REG_ISR_CODEC1_NOT_READY,
1063                 ATI_REG_ISR_CODEC2_NOT_READY,
1064         };
1065 
1066         if (snd_atiixp_codec_detect(chip) < 0)
1067                 return -ENXIO;
1068 
1069         if ((err = snd_ac97_bus(chip->card, 0, &ops, chip, &pbus)) < 0)
1070                 return err;
1071         pbus->clock = clock;
1072         chip->ac97_bus = pbus;
1073 
1074         codec_count = 0;
1075         for (i = 0; i < NUM_ATI_CODECS; i++) {
1076                 if (chip->codec_not_ready_bits & codec_skip[i])
1077                         continue;
1078                 memset(&ac97, 0, sizeof(ac97));
1079                 ac97.private_data = chip;
1080                 ac97.pci = chip->pci;
1081                 ac97.num = i;
1082                 ac97.scaps = AC97_SCAP_SKIP_AUDIO | AC97_SCAP_POWER_SAVE;
1083                 if ((err = snd_ac97_mixer(pbus, &ac97, &chip->ac97[i])) < 0) {
1084                         chip->ac97[i] = NULL; /* to be sure */
1085                         dev_dbg(chip->card->dev,
1086                                 "codec %d not available for modem\n", i);
1087                         continue;
1088                 }
1089                 codec_count++;
1090         }
1091 
1092         if (! codec_count) {
1093                 dev_err(chip->card->dev, "no codec available\n");
1094                 return -ENODEV;
1095         }
1096 
1097         /* snd_ac97_tune_hardware(chip->ac97, ac97_quirks); */
1098 
1099         return 0;
1100 }
1101 
1102 
1103 #ifdef CONFIG_PM_SLEEP
1104 /*
1105  * power management
1106  */
1107 static int snd_atiixp_suspend(struct device *dev)
1108 {
1109         struct snd_card *card = dev_get_drvdata(dev);
1110         struct atiixp_modem *chip = card->private_data;
1111         int i;
1112 
1113         snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
1114         for (i = 0; i < NUM_ATI_CODECS; i++)
1115                 snd_ac97_suspend(chip->ac97[i]);
1116         snd_atiixp_aclink_down(chip);
1117         snd_atiixp_chip_stop(chip);
1118         return 0;
1119 }
1120 
1121 static int snd_atiixp_resume(struct device *dev)
1122 {
1123         struct snd_card *card = dev_get_drvdata(dev);
1124         struct atiixp_modem *chip = card->private_data;
1125         int i;
1126 
1127         snd_atiixp_aclink_reset(chip);
1128         snd_atiixp_chip_start(chip);
1129 
1130         for (i = 0; i < NUM_ATI_CODECS; i++)
1131                 snd_ac97_resume(chip->ac97[i]);
1132 
1133         snd_power_change_state(card, SNDRV_CTL_POWER_D0);
1134         return 0;
1135 }
1136 
1137 static SIMPLE_DEV_PM_OPS(snd_atiixp_pm, snd_atiixp_suspend, snd_atiixp_resume);
1138 #define SND_ATIIXP_PM_OPS       &snd_atiixp_pm
1139 #else
1140 #define SND_ATIIXP_PM_OPS       NULL
1141 #endif /* CONFIG_PM_SLEEP */
1142 
1143 /*
1144  * proc interface for register dump
1145  */
1146 
1147 static void snd_atiixp_proc_read(struct snd_info_entry *entry,
1148                                  struct snd_info_buffer *buffer)
1149 {
1150         struct atiixp_modem *chip = entry->private_data;
1151         int i;
1152 
1153         for (i = 0; i < 256; i += 4)
1154                 snd_iprintf(buffer, "%02x: %08x\n", i, readl(chip->remap_addr + i));
1155 }
1156 
1157 static void snd_atiixp_proc_init(struct atiixp_modem *chip)
1158 {
1159         snd_card_ro_proc_new(chip->card, "atiixp-modem", chip,
1160                              snd_atiixp_proc_read);
1161 }
1162 
1163 
1164 /*
1165  * destructor
1166  */
1167 
1168 static int snd_atiixp_free(struct atiixp_modem *chip)
1169 {
1170         if (chip->irq < 0)
1171                 goto __hw_end;
1172         snd_atiixp_chip_stop(chip);
1173 
1174       __hw_end:
1175         if (chip->irq >= 0)
1176                 free_irq(chip->irq, chip);
1177         iounmap(chip->remap_addr);
1178         pci_release_regions(chip->pci);
1179         pci_disable_device(chip->pci);
1180         kfree(chip);
1181         return 0;
1182 }
1183 
1184 static int snd_atiixp_dev_free(struct snd_device *device)
1185 {
1186         struct atiixp_modem *chip = device->device_data;
1187         return snd_atiixp_free(chip);
1188 }
1189 
1190 /*
1191  * constructor for chip instance
1192  */
1193 static int snd_atiixp_create(struct snd_card *card,
1194                              struct pci_dev *pci,
1195                              struct atiixp_modem **r_chip)
1196 {
1197         static struct snd_device_ops ops = {
1198                 .dev_free =     snd_atiixp_dev_free,
1199         };
1200         struct atiixp_modem *chip;
1201         int err;
1202 
1203         if ((err = pci_enable_device(pci)) < 0)
1204                 return err;
1205 
1206         chip = kzalloc(sizeof(*chip), GFP_KERNEL);
1207         if (chip == NULL) {
1208                 pci_disable_device(pci);
1209                 return -ENOMEM;
1210         }
1211 
1212         spin_lock_init(&chip->reg_lock);
1213         mutex_init(&chip->open_mutex);
1214         chip->card = card;
1215         chip->pci = pci;
1216         chip->irq = -1;
1217         if ((err = pci_request_regions(pci, "ATI IXP MC97")) < 0) {
1218                 kfree(chip);
1219                 pci_disable_device(pci);
1220                 return err;
1221         }
1222         chip->addr = pci_resource_start(pci, 0);
1223         chip->remap_addr = pci_ioremap_bar(pci, 0);
1224         if (chip->remap_addr == NULL) {
1225                 dev_err(card->dev, "AC'97 space ioremap problem\n");
1226                 snd_atiixp_free(chip);
1227                 return -EIO;
1228         }
1229 
1230         if (request_irq(pci->irq, snd_atiixp_interrupt, IRQF_SHARED,
1231                         KBUILD_MODNAME, chip)) {
1232                 dev_err(card->dev, "unable to grab IRQ %d\n", pci->irq);
1233                 snd_atiixp_free(chip);
1234                 return -EBUSY;
1235         }
1236         chip->irq = pci->irq;
1237         pci_set_master(pci);
1238         synchronize_irq(chip->irq);
1239 
1240         if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
1241                 snd_atiixp_free(chip);
1242                 return err;
1243         }
1244 
1245         *r_chip = chip;
1246         return 0;
1247 }
1248 
1249 
1250 static int snd_atiixp_probe(struct pci_dev *pci,
1251                             const struct pci_device_id *pci_id)
1252 {
1253         struct snd_card *card;
1254         struct atiixp_modem *chip;
1255         int err;
1256 
1257         err = snd_card_new(&pci->dev, index, id, THIS_MODULE, 0, &card);
1258         if (err < 0)
1259                 return err;
1260 
1261         strcpy(card->driver, "ATIIXP-MODEM");
1262         strcpy(card->shortname, "ATI IXP Modem");
1263         if ((err = snd_atiixp_create(card, pci, &chip)) < 0)
1264                 goto __error;
1265         card->private_data = chip;
1266 
1267         if ((err = snd_atiixp_aclink_reset(chip)) < 0)
1268                 goto __error;
1269 
1270         if ((err = snd_atiixp_mixer_new(chip, ac97_clock)) < 0)
1271                 goto __error;
1272 
1273         if ((err = snd_atiixp_pcm_new(chip)) < 0)
1274                 goto __error;
1275         
1276         snd_atiixp_proc_init(chip);
1277 
1278         snd_atiixp_chip_start(chip);
1279 
1280         sprintf(card->longname, "%s rev %x at 0x%lx, irq %i",
1281                 card->shortname, pci->revision, chip->addr, chip->irq);
1282 
1283         if ((err = snd_card_register(card)) < 0)
1284                 goto __error;
1285 
1286         pci_set_drvdata(pci, card);
1287         return 0;
1288 
1289  __error:
1290         snd_card_free(card);
1291         return err;
1292 }
1293 
1294 static void snd_atiixp_remove(struct pci_dev *pci)
1295 {
1296         snd_card_free(pci_get_drvdata(pci));
1297 }
1298 
1299 static struct pci_driver atiixp_modem_driver = {
1300         .name = KBUILD_MODNAME,
1301         .id_table = snd_atiixp_ids,
1302         .probe = snd_atiixp_probe,
1303         .remove = snd_atiixp_remove,
1304         .driver = {
1305                 .pm = SND_ATIIXP_PM_OPS,
1306         },
1307 };
1308 
1309 module_pci_driver(atiixp_modem_driver);
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root/sound/pci/atiixp_modem.c

DEFINITIONS
