Logo Search packages:      
Sourcecode: linux version File versions  Download package

cs4231.c

/*
 * Driver for CS4231 sound chips found on Sparcs.
 * Copyright (C) 2002 David S. Miller <davem@redhat.com>
 *
 * Based entirely upon drivers/sbus/audio/cs4231.c which is:
 * Copyright (C) 1996, 1997, 1998 Derrick J Brashear (shadow@andrew.cmu.edu)
 * and also sound/isa/cs423x/cs4231_lib.c which is:
 * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 */

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/moduleparam.h>
#include <linux/irq.h>
#include <linux/io.h>


#include <sound/driver.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/info.h>
#include <sound/control.h>
#include <sound/timer.h>
#include <sound/initval.h>
#include <sound/pcm_params.h>

#ifdef CONFIG_SBUS
#define SBUS_SUPPORT
#include <asm/sbus.h>
#endif

#if defined(CONFIG_PCI) && defined(CONFIG_SPARC64)
#define EBUS_SUPPORT
#include <linux/pci.h>
#include <asm/ebus.h>
#endif

static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;    /* Index 0-MAX */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;     /* ID for this card */
/* Enable this card */
static int enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for Sun CS4231 soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for Sun CS4231 soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable Sun CS4231 soundcard.");
MODULE_AUTHOR("Jaroslav Kysela, Derrick J. Brashear and David S. Miller");
MODULE_DESCRIPTION("Sun CS4231");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Sun,CS4231}}");

#ifdef SBUS_SUPPORT
struct sbus_dma_info {
       spinlock_t lock; /* DMA access lock */
       int        dir;
       void __iomem     *regs;
};
#endif

struct snd_cs4231;
struct cs4231_dma_control {
      void        (*prepare)(struct cs4231_dma_control *dma_cont,
                           int dir);
      void        (*enable)(struct cs4231_dma_control *dma_cont, int on);
      int         (*request)(struct cs4231_dma_control *dma_cont,
                           dma_addr_t bus_addr, size_t len);
      unsigned int      (*address)(struct cs4231_dma_control *dma_cont);
      void        (*preallocate)(struct snd_cs4231 *chip,
                               struct snd_pcm *pcm);
#ifdef EBUS_SUPPORT
      struct            ebus_dma_info     ebus_info;
#endif
#ifdef SBUS_SUPPORT
      struct            sbus_dma_info     sbus_info;
#endif
};

struct snd_cs4231 {
      spinlock_t        lock; /* registers access lock */
      void __iomem            *port;

      struct cs4231_dma_control     p_dma;
      struct cs4231_dma_control     c_dma;

      u32               flags;
#define CS4231_FLAG_EBUS      0x00000001
#define CS4231_FLAG_PLAYBACK  0x00000002
#define CS4231_FLAG_CAPTURE   0x00000004

      struct snd_card         *card;
      struct snd_pcm          *pcm;
      struct snd_pcm_substream      *playback_substream;
      unsigned int            p_periods_sent;
      struct snd_pcm_substream      *capture_substream;
      unsigned int            c_periods_sent;
      struct snd_timer  *timer;

      unsigned short mode;
#define CS4231_MODE_NONE      0x0000
#define CS4231_MODE_PLAY      0x0001
#define CS4231_MODE_RECORD    0x0002
#define CS4231_MODE_TIMER     0x0004
#define CS4231_MODE_OPEN      (CS4231_MODE_PLAY | CS4231_MODE_RECORD | \
                         CS4231_MODE_TIMER)

      unsigned char           image[32];  /* registers image */
      int               mce_bit;
      int               calibrate_mute;
      struct mutex            mce_mutex;  /* mutex for mce register */
      struct mutex            open_mutex; /* mutex for ALSA open/close */

      union {
#ifdef SBUS_SUPPORT
            struct sbus_dev         *sdev;
#endif
#ifdef EBUS_SUPPORT
            struct pci_dev          *pdev;
#endif
      } dev_u;
      unsigned int            irq[2];
      unsigned int            regs_size;
      struct snd_cs4231 *next;
};

static struct snd_cs4231 *cs4231_list;

/* Eventually we can use sound/isa/cs423x/cs4231_lib.c directly, but for
 * now....  -DaveM
 */

/* IO ports */
#include <sound/cs4231-regs.h>

/* XXX offsets are different than PC ISA chips... */
#define CS4231U(chip, x)      ((chip)->port + ((c_d_c_CS4231##x) << 2))

/* SBUS DMA register defines.  */

#define APCCSR    0x10UL      /* APC DMA CSR */
#define APCCVA    0x20UL      /* APC Capture DMA Address */
#define APCCC     0x24UL      /* APC Capture Count */
#define APCCNVA   0x28UL      /* APC Capture DMA Next Address */
#define APCCNC    0x2cUL      /* APC Capture Next Count */
#define APCPVA    0x30UL      /* APC Play DMA Address */
#define APCPC     0x34UL      /* APC Play Count */
#define APCPNVA   0x38UL      /* APC Play DMA Next Address */
#define APCPNC    0x3cUL      /* APC Play Next Count */

/* Defines for SBUS DMA-routines */

#define APCVA  0x0UL    /* APC DMA Address */
#define APCC   0x4UL    /* APC Count */
#define APCNVA 0x8UL    /* APC DMA Next Address */
#define APCNC  0xcUL    /* APC Next Count */
#define APC_PLAY 0x30UL /* Play registers start at 0x30 */
#define APC_RECORD 0x20UL /* Record registers start at 0x20 */

/* APCCSR bits */

#define APC_INT_PENDING 0x800000 /* Interrupt Pending */
#define APC_PLAY_INT    0x400000 /* Playback interrupt */
#define APC_CAPT_INT    0x200000 /* Capture interrupt */
#define APC_GENL_INT    0x100000 /* General interrupt */
#define APC_XINT_ENA    0x80000  /* General ext int. enable */
#define APC_XINT_PLAY   0x40000  /* Playback ext intr */
#define APC_XINT_CAPT   0x20000  /* Capture ext intr */
#define APC_XINT_GENL   0x10000  /* Error ext intr */
#define APC_XINT_EMPT   0x8000   /* Pipe empty interrupt (0 write to pva) */
#define APC_XINT_PEMP   0x4000   /* Play pipe empty (pva and pnva not set) */
#define APC_XINT_PNVA   0x2000   /* Playback NVA dirty */
#define APC_XINT_PENA   0x1000   /* play pipe empty Int enable */
#define APC_XINT_COVF   0x800    /* Cap data dropped on floor */
#define APC_XINT_CNVA   0x400    /* Capture NVA dirty */
#define APC_XINT_CEMP   0x200    /* Capture pipe empty (cva and cnva not set) */
#define APC_XINT_CENA   0x100    /* Cap. pipe empty int enable */
#define APC_PPAUSE      0x80     /* Pause the play DMA */
#define APC_CPAUSE      0x40     /* Pause the capture DMA */
#define APC_CDC_RESET   0x20     /* CODEC RESET */
#define APC_PDMA_READY  0x08     /* Play DMA Go */
#define APC_CDMA_READY  0x04     /* Capture DMA Go */
#define APC_CHIP_RESET  0x01     /* Reset the chip */

/* EBUS DMA register offsets  */

#define EBDMA_CSR 0x00UL      /* Control/Status */
#define EBDMA_ADDR      0x04UL      /* DMA Address */
#define EBDMA_COUNT     0x08UL      /* DMA Count */

/*
 *  Some variables
 */

static unsigned char freq_bits[14] = {
      /* 5510 */  0x00 | CS4231_XTAL2,
      /* 6620 */  0x0E | CS4231_XTAL2,
      /* 8000 */  0x00 | CS4231_XTAL1,
      /* 9600 */  0x0E | CS4231_XTAL1,
      /* 11025 */ 0x02 | CS4231_XTAL2,
      /* 16000 */ 0x02 | CS4231_XTAL1,
      /* 18900 */ 0x04 | CS4231_XTAL2,
      /* 22050 */ 0x06 | CS4231_XTAL2,
      /* 27042 */ 0x04 | CS4231_XTAL1,
      /* 32000 */ 0x06 | CS4231_XTAL1,
      /* 33075 */ 0x0C | CS4231_XTAL2,
      /* 37800 */ 0x08 | CS4231_XTAL2,
      /* 44100 */ 0x0A | CS4231_XTAL2,
      /* 48000 */ 0x0C | CS4231_XTAL1
};

static unsigned int rates[14] = {
      5510, 6620, 8000, 9600, 11025, 16000, 18900, 22050,
      27042, 32000, 33075, 37800, 44100, 48000
};

static struct snd_pcm_hw_constraint_list hw_constraints_rates = {
      .count      = ARRAY_SIZE(rates),
      .list = rates,
};

static int snd_cs4231_xrate(struct snd_pcm_runtime *runtime)
{
      return snd_pcm_hw_constraint_list(runtime, 0,
                                SNDRV_PCM_HW_PARAM_RATE,
                                &hw_constraints_rates);
}

static unsigned char snd_cs4231_original_image[32] =
{
      0x00,             /* 00/00 - lic */
      0x00,             /* 01/01 - ric */
      0x9f,             /* 02/02 - la1ic */
      0x9f,             /* 03/03 - ra1ic */
      0x9f,             /* 04/04 - la2ic */
      0x9f,             /* 05/05 - ra2ic */
      0xbf,             /* 06/06 - loc */
      0xbf,             /* 07/07 - roc */
      0x20,             /* 08/08 - pdfr */
      CS4231_AUTOCALIB, /* 09/09 - ic */
      0x00,             /* 0a/10 - pc */
      0x00,             /* 0b/11 - ti */
      CS4231_MODE2,           /* 0c/12 - mi */
      0x00,             /* 0d/13 - lbc */
      0x00,             /* 0e/14 - pbru */
      0x00,             /* 0f/15 - pbrl */
      0x80,             /* 10/16 - afei */
      0x01,             /* 11/17 - afeii */
      0x9f,             /* 12/18 - llic */
      0x9f,             /* 13/19 - rlic */
      0x00,             /* 14/20 - tlb */
      0x00,             /* 15/21 - thb */
      0x00,             /* 16/22 - la3mic/reserved */
      0x00,             /* 17/23 - ra3mic/reserved */
      0x00,             /* 18/24 - afs */
      0x00,             /* 19/25 - lamoc/version */
      0x00,             /* 1a/26 - mioc */
      0x00,             /* 1b/27 - ramoc/reserved */
      0x20,             /* 1c/28 - cdfr */
      0x00,             /* 1d/29 - res4 */
      0x00,             /* 1e/30 - cbru */
      0x00,             /* 1f/31 - cbrl */
};

static u8 __cs4231_readb(struct snd_cs4231 *cp, void __iomem *reg_addr)
{
#ifdef EBUS_SUPPORT
      if (cp->flags & CS4231_FLAG_EBUS)
            return readb(reg_addr);
      else
#endif
#ifdef SBUS_SUPPORT
            return sbus_readb(reg_addr);
#endif
}

static void __cs4231_writeb(struct snd_cs4231 *cp, u8 val,
                      void __iomem *reg_addr)
{
#ifdef EBUS_SUPPORT
      if (cp->flags & CS4231_FLAG_EBUS)
            return writeb(val, reg_addr);
      else
#endif
#ifdef SBUS_SUPPORT
            return sbus_writeb(val, reg_addr);
#endif
}

/*
 *  Basic I/O functions
 */

static void snd_cs4231_ready(struct snd_cs4231 *chip)
{
      int timeout;

      for (timeout = 250; timeout > 0; timeout--) {
            int val = __cs4231_readb(chip, CS4231U(chip, REGSEL));
            if ((val & CS4231_INIT) == 0)
                  break;
            udelay(100);
      }
}

static void snd_cs4231_dout(struct snd_cs4231 *chip, unsigned char reg,
                      unsigned char value)
{
      snd_cs4231_ready(chip);
#ifdef CONFIG_SND_DEBUG
      if (__cs4231_readb(chip, CS4231U(chip, REGSEL)) & CS4231_INIT)
            snd_printdd("out: auto calibration time out - reg = 0x%x, "
                      "value = 0x%x\n",
                      reg, value);
#endif
      __cs4231_writeb(chip, chip->mce_bit | reg, CS4231U(chip, REGSEL));
      wmb();
      __cs4231_writeb(chip, value, CS4231U(chip, REG));
      mb();
}

static inline void snd_cs4231_outm(struct snd_cs4231 *chip, unsigned char reg,
                 unsigned char mask, unsigned char value)
{
      unsigned char tmp = (chip->image[reg] & mask) | value;

      chip->image[reg] = tmp;
      if (!chip->calibrate_mute)
            snd_cs4231_dout(chip, reg, tmp);
}

static void snd_cs4231_out(struct snd_cs4231 *chip, unsigned char reg,
                     unsigned char value)
{
      snd_cs4231_dout(chip, reg, value);
      chip->image[reg] = value;
      mb();
}

static unsigned char snd_cs4231_in(struct snd_cs4231 *chip, unsigned char reg)
{
      snd_cs4231_ready(chip);
#ifdef CONFIG_SND_DEBUG
      if (__cs4231_readb(chip, CS4231U(chip, REGSEL)) & CS4231_INIT)
            snd_printdd("in: auto calibration time out - reg = 0x%x\n",
                      reg);
#endif
      __cs4231_writeb(chip, chip->mce_bit | reg, CS4231U(chip, REGSEL));
      mb();
      return __cs4231_readb(chip, CS4231U(chip, REG));
}

/*
 *  CS4231 detection / MCE routines
 */

static void snd_cs4231_busy_wait(struct snd_cs4231 *chip)
{
      int timeout;

      /* looks like this sequence is proper for CS4231A chip (GUS MAX) */
      for (timeout = 5; timeout > 0; timeout--)
            __cs4231_readb(chip, CS4231U(chip, REGSEL));

      /* end of cleanup sequence */
      for (timeout = 500; timeout > 0; timeout--) {
            int val = __cs4231_readb(chip, CS4231U(chip, REGSEL));
            if ((val & CS4231_INIT) == 0)
                  break;
            msleep(1);
      }
}

static void snd_cs4231_mce_up(struct snd_cs4231 *chip)
{
      unsigned long flags;
      int timeout;

      spin_lock_irqsave(&chip->lock, flags);
      snd_cs4231_ready(chip);
#ifdef CONFIG_SND_DEBUG
      if (__cs4231_readb(chip, CS4231U(chip, REGSEL)) & CS4231_INIT)
            snd_printdd("mce_up - auto calibration time out (0)\n");
#endif
      chip->mce_bit |= CS4231_MCE;
      timeout = __cs4231_readb(chip, CS4231U(chip, REGSEL));
      if (timeout == 0x80)
            snd_printdd("mce_up [%p]: serious init problem - "
                      "codec still busy\n",
                      chip->port);
      if (!(timeout & CS4231_MCE))
            __cs4231_writeb(chip, chip->mce_bit | (timeout & 0x1f),
                        CS4231U(chip, REGSEL));
      spin_unlock_irqrestore(&chip->lock, flags);
}

static void snd_cs4231_mce_down(struct snd_cs4231 *chip)
{
      unsigned long flags, timeout;
      int reg;

      snd_cs4231_busy_wait(chip);
      spin_lock_irqsave(&chip->lock, flags);
#ifdef CONFIG_SND_DEBUG
      if (__cs4231_readb(chip, CS4231U(chip, REGSEL)) & CS4231_INIT)
            snd_printdd("mce_down [%p] - auto calibration time out (0)\n",
                      CS4231U(chip, REGSEL));
#endif
      chip->mce_bit &= ~CS4231_MCE;
      reg = __cs4231_readb(chip, CS4231U(chip, REGSEL));
      __cs4231_writeb(chip, chip->mce_bit | (reg & 0x1f),
                  CS4231U(chip, REGSEL));
      if (reg == 0x80)
            snd_printdd("mce_down [%p]: serious init problem "
                      "- codec still busy\n", chip->port);
      if ((reg & CS4231_MCE) == 0) {
            spin_unlock_irqrestore(&chip->lock, flags);
            return;
      }

      /*
       * Wait for auto-calibration (AC) process to finish, i.e. ACI to go low.
       */
      timeout = jiffies + msecs_to_jiffies(250);
      do {
            spin_unlock_irqrestore(&chip->lock, flags);
            msleep(1);
            spin_lock_irqsave(&chip->lock, flags);
            reg = snd_cs4231_in(chip, CS4231_TEST_INIT);
            reg &= CS4231_CALIB_IN_PROGRESS;
      } while (reg && time_before(jiffies, timeout));
      spin_unlock_irqrestore(&chip->lock, flags);

      if (reg)
            snd_printk(KERN_ERR
                     "mce_down - auto calibration time out (2)\n");
}

static void snd_cs4231_advance_dma(struct cs4231_dma_control *dma_cont,
                           struct snd_pcm_substream *substream,
                           unsigned int *periods_sent)
{
      struct snd_pcm_runtime *runtime = substream->runtime;

      while (1) {
            unsigned int period_size = snd_pcm_lib_period_bytes(substream);
            unsigned int offset = period_size * (*periods_sent);

            BUG_ON(period_size >= (1 << 24));

            if (dma_cont->request(dma_cont,
                              runtime->dma_addr + offset, period_size))
                  return;
            (*periods_sent) = ((*periods_sent) + 1) % runtime->periods;
      }
}

static void cs4231_dma_trigger(struct snd_pcm_substream *substream,
                         unsigned int what, int on)
{
      struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
      struct cs4231_dma_control *dma_cont;

      if (what & CS4231_PLAYBACK_ENABLE) {
            dma_cont = &chip->p_dma;
            if (on) {
                  dma_cont->prepare(dma_cont, 0);
                  dma_cont->enable(dma_cont, 1);
                  snd_cs4231_advance_dma(dma_cont,
                        chip->playback_substream,
                        &chip->p_periods_sent);
            } else {
                  dma_cont->enable(dma_cont, 0);
            }
      }
      if (what & CS4231_RECORD_ENABLE) {
            dma_cont = &chip->c_dma;
            if (on) {
                  dma_cont->prepare(dma_cont, 1);
                  dma_cont->enable(dma_cont, 1);
                  snd_cs4231_advance_dma(dma_cont,
                        chip->capture_substream,
                        &chip->c_periods_sent);
            } else {
                  dma_cont->enable(dma_cont, 0);
            }
      }
}

static int snd_cs4231_trigger(struct snd_pcm_substream *substream, int cmd)
{
      struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
      int result = 0;

      switch (cmd) {
      case SNDRV_PCM_TRIGGER_START:
      case SNDRV_PCM_TRIGGER_STOP:
      {
            unsigned int what = 0;
            struct snd_pcm_substream *s;
            unsigned long flags;

            snd_pcm_group_for_each_entry(s, substream) {
                  if (s == chip->playback_substream) {
                        what |= CS4231_PLAYBACK_ENABLE;
                        snd_pcm_trigger_done(s, substream);
                  } else if (s == chip->capture_substream) {
                        what |= CS4231_RECORD_ENABLE;
                        snd_pcm_trigger_done(s, substream);
                  }
            }

            spin_lock_irqsave(&chip->lock, flags);
            if (cmd == SNDRV_PCM_TRIGGER_START) {
                  cs4231_dma_trigger(substream, what, 1);
                  chip->image[CS4231_IFACE_CTRL] |= what;
            } else {
                  cs4231_dma_trigger(substream, what, 0);
                  chip->image[CS4231_IFACE_CTRL] &= ~what;
            }
            snd_cs4231_out(chip, CS4231_IFACE_CTRL,
                         chip->image[CS4231_IFACE_CTRL]);
            spin_unlock_irqrestore(&chip->lock, flags);
            break;
      }
      default:
            result = -EINVAL;
            break;
      }

      return result;
}

/*
 *  CODEC I/O
 */

static unsigned char snd_cs4231_get_rate(unsigned int rate)
{
      int i;

      for (i = 0; i < 14; i++)
            if (rate == rates[i])
                  return freq_bits[i];

      return freq_bits[13];
}

static unsigned char snd_cs4231_get_format(struct snd_cs4231 *chip, int format,
                                 int channels)
{
      unsigned char rformat;

      rformat = CS4231_LINEAR_8;
      switch (format) {
      case SNDRV_PCM_FORMAT_MU_LAW:
            rformat = CS4231_ULAW_8;
            break;
      case SNDRV_PCM_FORMAT_A_LAW:
            rformat = CS4231_ALAW_8;
            break;
      case SNDRV_PCM_FORMAT_S16_LE:
            rformat = CS4231_LINEAR_16;
            break;
      case SNDRV_PCM_FORMAT_S16_BE:
            rformat = CS4231_LINEAR_16_BIG;
            break;
      case SNDRV_PCM_FORMAT_IMA_ADPCM:
            rformat = CS4231_ADPCM_16;
            break;
      }
      if (channels > 1)
            rformat |= CS4231_STEREO;
      return rformat;
}

static void snd_cs4231_calibrate_mute(struct snd_cs4231 *chip, int mute)
{
      unsigned long flags;

      mute = mute ? 1 : 0;
      spin_lock_irqsave(&chip->lock, flags);
      if (chip->calibrate_mute == mute) {
            spin_unlock_irqrestore(&chip->lock, flags);
            return;
      }
      if (!mute) {
            snd_cs4231_dout(chip, CS4231_LEFT_INPUT,
                        chip->image[CS4231_LEFT_INPUT]);
            snd_cs4231_dout(chip, CS4231_RIGHT_INPUT,
                        chip->image[CS4231_RIGHT_INPUT]);
            snd_cs4231_dout(chip, CS4231_LOOPBACK,
                        chip->image[CS4231_LOOPBACK]);
      }
      snd_cs4231_dout(chip, CS4231_AUX1_LEFT_INPUT,
                  mute ? 0x80 : chip->image[CS4231_AUX1_LEFT_INPUT]);
      snd_cs4231_dout(chip, CS4231_AUX1_RIGHT_INPUT,
                  mute ? 0x80 : chip->image[CS4231_AUX1_RIGHT_INPUT]);
      snd_cs4231_dout(chip, CS4231_AUX2_LEFT_INPUT,
                  mute ? 0x80 : chip->image[CS4231_AUX2_LEFT_INPUT]);
      snd_cs4231_dout(chip, CS4231_AUX2_RIGHT_INPUT,
                  mute ? 0x80 : chip->image[CS4231_AUX2_RIGHT_INPUT]);
      snd_cs4231_dout(chip, CS4231_LEFT_OUTPUT,
                  mute ? 0x80 : chip->image[CS4231_LEFT_OUTPUT]);
      snd_cs4231_dout(chip, CS4231_RIGHT_OUTPUT,
                  mute ? 0x80 : chip->image[CS4231_RIGHT_OUTPUT]);
      snd_cs4231_dout(chip, CS4231_LEFT_LINE_IN,
                  mute ? 0x80 : chip->image[CS4231_LEFT_LINE_IN]);
      snd_cs4231_dout(chip, CS4231_RIGHT_LINE_IN,
                  mute ? 0x80 : chip->image[CS4231_RIGHT_LINE_IN]);
      snd_cs4231_dout(chip, CS4231_MONO_CTRL,
                  mute ? 0xc0 : chip->image[CS4231_MONO_CTRL]);
      chip->calibrate_mute = mute;
      spin_unlock_irqrestore(&chip->lock, flags);
}

static void snd_cs4231_playback_format(struct snd_cs4231 *chip,
                               struct snd_pcm_hw_params *params,
                               unsigned char pdfr)
{
      unsigned long flags;

      mutex_lock(&chip->mce_mutex);
      snd_cs4231_calibrate_mute(chip, 1);

      snd_cs4231_mce_up(chip);

      spin_lock_irqsave(&chip->lock, flags);
      snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT,
                   (chip->image[CS4231_IFACE_CTRL] & CS4231_RECORD_ENABLE) ?
                   (pdfr & 0xf0) | (chip->image[CS4231_REC_FORMAT] & 0x0f) :
                   pdfr);
      spin_unlock_irqrestore(&chip->lock, flags);

      snd_cs4231_mce_down(chip);

      snd_cs4231_calibrate_mute(chip, 0);
      mutex_unlock(&chip->mce_mutex);
}

static void snd_cs4231_capture_format(struct snd_cs4231 *chip,
                              struct snd_pcm_hw_params *params,
                              unsigned char cdfr)
{
      unsigned long flags;

      mutex_lock(&chip->mce_mutex);
      snd_cs4231_calibrate_mute(chip, 1);

      snd_cs4231_mce_up(chip);

      spin_lock_irqsave(&chip->lock, flags);
      if (!(chip->image[CS4231_IFACE_CTRL] & CS4231_PLAYBACK_ENABLE)) {
            snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT,
                         ((chip->image[CS4231_PLAYBK_FORMAT]) & 0xf0) |
                         (cdfr & 0x0f));
            spin_unlock_irqrestore(&chip->lock, flags);
            snd_cs4231_mce_down(chip);
            snd_cs4231_mce_up(chip);
            spin_lock_irqsave(&chip->lock, flags);
      }
      snd_cs4231_out(chip, CS4231_REC_FORMAT, cdfr);
      spin_unlock_irqrestore(&chip->lock, flags);

      snd_cs4231_mce_down(chip);

      snd_cs4231_calibrate_mute(chip, 0);
      mutex_unlock(&chip->mce_mutex);
}

/*
 *  Timer interface
 */

static unsigned long snd_cs4231_timer_resolution(struct snd_timer *timer)
{
      struct snd_cs4231 *chip = snd_timer_chip(timer);

      return chip->image[CS4231_PLAYBK_FORMAT] & 1 ? 9969 : 9920;
}

static int snd_cs4231_timer_start(struct snd_timer *timer)
{
      unsigned long flags;
      unsigned int ticks;
      struct snd_cs4231 *chip = snd_timer_chip(timer);

      spin_lock_irqsave(&chip->lock, flags);
      ticks = timer->sticks;
      if ((chip->image[CS4231_ALT_FEATURE_1] & CS4231_TIMER_ENABLE) == 0 ||
          (unsigned char)(ticks >> 8) != chip->image[CS4231_TIMER_HIGH] ||
          (unsigned char)ticks != chip->image[CS4231_TIMER_LOW]) {
            snd_cs4231_out(chip, CS4231_TIMER_HIGH,
                         chip->image[CS4231_TIMER_HIGH] =
                         (unsigned char) (ticks >> 8));
            snd_cs4231_out(chip, CS4231_TIMER_LOW,
                         chip->image[CS4231_TIMER_LOW] =
                         (unsigned char) ticks);
            snd_cs4231_out(chip, CS4231_ALT_FEATURE_1,
                         chip->image[CS4231_ALT_FEATURE_1] |
                              CS4231_TIMER_ENABLE);
      }
      spin_unlock_irqrestore(&chip->lock, flags);

      return 0;
}

static int snd_cs4231_timer_stop(struct snd_timer *timer)
{
      unsigned long flags;
      struct snd_cs4231 *chip = snd_timer_chip(timer);

      spin_lock_irqsave(&chip->lock, flags);
      chip->image[CS4231_ALT_FEATURE_1] &= ~CS4231_TIMER_ENABLE;
      snd_cs4231_out(chip, CS4231_ALT_FEATURE_1,
                   chip->image[CS4231_ALT_FEATURE_1]);
      spin_unlock_irqrestore(&chip->lock, flags);

      return 0;
}

static void __init snd_cs4231_init(struct snd_cs4231 *chip)
{
      unsigned long flags;

      snd_cs4231_mce_down(chip);

#ifdef SNDRV_DEBUG_MCE
      snd_printdd("init: (1)\n");
#endif
      snd_cs4231_mce_up(chip);
      spin_lock_irqsave(&chip->lock, flags);
      chip->image[CS4231_IFACE_CTRL] &= ~(CS4231_PLAYBACK_ENABLE |
                                  CS4231_PLAYBACK_PIO |
                                  CS4231_RECORD_ENABLE |
                                  CS4231_RECORD_PIO |
                                  CS4231_CALIB_MODE);
      chip->image[CS4231_IFACE_CTRL] |= CS4231_AUTOCALIB;
      snd_cs4231_out(chip, CS4231_IFACE_CTRL, chip->image[CS4231_IFACE_CTRL]);
      spin_unlock_irqrestore(&chip->lock, flags);
      snd_cs4231_mce_down(chip);

#ifdef SNDRV_DEBUG_MCE
      snd_printdd("init: (2)\n");
#endif

      snd_cs4231_mce_up(chip);
      spin_lock_irqsave(&chip->lock, flags);
      snd_cs4231_out(chip, CS4231_ALT_FEATURE_1,
                  chip->image[CS4231_ALT_FEATURE_1]);
      spin_unlock_irqrestore(&chip->lock, flags);
      snd_cs4231_mce_down(chip);

#ifdef SNDRV_DEBUG_MCE
      snd_printdd("init: (3) - afei = 0x%x\n",
                chip->image[CS4231_ALT_FEATURE_1]);
#endif

      spin_lock_irqsave(&chip->lock, flags);
      snd_cs4231_out(chip, CS4231_ALT_FEATURE_2,
                  chip->image[CS4231_ALT_FEATURE_2]);
      spin_unlock_irqrestore(&chip->lock, flags);

      snd_cs4231_mce_up(chip);
      spin_lock_irqsave(&chip->lock, flags);
      snd_cs4231_out(chip, CS4231_PLAYBK_FORMAT,
                  chip->image[CS4231_PLAYBK_FORMAT]);
      spin_unlock_irqrestore(&chip->lock, flags);
      snd_cs4231_mce_down(chip);

#ifdef SNDRV_DEBUG_MCE
      snd_printdd("init: (4)\n");
#endif

      snd_cs4231_mce_up(chip);
      spin_lock_irqsave(&chip->lock, flags);
      snd_cs4231_out(chip, CS4231_REC_FORMAT, chip->image[CS4231_REC_FORMAT]);
      spin_unlock_irqrestore(&chip->lock, flags);
      snd_cs4231_mce_down(chip);

#ifdef SNDRV_DEBUG_MCE
      snd_printdd("init: (5)\n");
#endif
}

static int snd_cs4231_open(struct snd_cs4231 *chip, unsigned int mode)
{
      unsigned long flags;

      mutex_lock(&chip->open_mutex);
      if ((chip->mode & mode)) {
            mutex_unlock(&chip->open_mutex);
            return -EAGAIN;
      }
      if (chip->mode & CS4231_MODE_OPEN) {
            chip->mode |= mode;
            mutex_unlock(&chip->open_mutex);
            return 0;
      }
      /* ok. now enable and ack CODEC IRQ */
      spin_lock_irqsave(&chip->lock, flags);
      snd_cs4231_out(chip, CS4231_IRQ_STATUS, CS4231_PLAYBACK_IRQ |
                   CS4231_RECORD_IRQ |
                   CS4231_TIMER_IRQ);
      snd_cs4231_out(chip, CS4231_IRQ_STATUS, 0);
      __cs4231_writeb(chip, 0, CS4231U(chip, STATUS));      /* clear IRQ */
      __cs4231_writeb(chip, 0, CS4231U(chip, STATUS));      /* clear IRQ */

      snd_cs4231_out(chip, CS4231_IRQ_STATUS, CS4231_PLAYBACK_IRQ |
                   CS4231_RECORD_IRQ |
                   CS4231_TIMER_IRQ);
      snd_cs4231_out(chip, CS4231_IRQ_STATUS, 0);

      spin_unlock_irqrestore(&chip->lock, flags);

      chip->mode = mode;
      mutex_unlock(&chip->open_mutex);
      return 0;
}

static void snd_cs4231_close(struct snd_cs4231 *chip, unsigned int mode)
{
      unsigned long flags;

      mutex_lock(&chip->open_mutex);
      chip->mode &= ~mode;
      if (chip->mode & CS4231_MODE_OPEN) {
            mutex_unlock(&chip->open_mutex);
            return;
      }
      snd_cs4231_calibrate_mute(chip, 1);

      /* disable IRQ */
      spin_lock_irqsave(&chip->lock, flags);
      snd_cs4231_out(chip, CS4231_IRQ_STATUS, 0);
      __cs4231_writeb(chip, 0, CS4231U(chip, STATUS));      /* clear IRQ */
      __cs4231_writeb(chip, 0, CS4231U(chip, STATUS));      /* clear IRQ */

      /* now disable record & playback */

      if (chip->image[CS4231_IFACE_CTRL] &
          (CS4231_PLAYBACK_ENABLE | CS4231_PLAYBACK_PIO |
           CS4231_RECORD_ENABLE | CS4231_RECORD_PIO)) {
            spin_unlock_irqrestore(&chip->lock, flags);
            snd_cs4231_mce_up(chip);
            spin_lock_irqsave(&chip->lock, flags);
            chip->image[CS4231_IFACE_CTRL] &=
                  ~(CS4231_PLAYBACK_ENABLE | CS4231_PLAYBACK_PIO |
                    CS4231_RECORD_ENABLE | CS4231_RECORD_PIO);
            snd_cs4231_out(chip, CS4231_IFACE_CTRL,
                        chip->image[CS4231_IFACE_CTRL]);
            spin_unlock_irqrestore(&chip->lock, flags);
            snd_cs4231_mce_down(chip);
            spin_lock_irqsave(&chip->lock, flags);
      }

      /* clear IRQ again */
      snd_cs4231_out(chip, CS4231_IRQ_STATUS, 0);
      __cs4231_writeb(chip, 0, CS4231U(chip, STATUS));      /* clear IRQ */
      __cs4231_writeb(chip, 0, CS4231U(chip, STATUS));      /* clear IRQ */
      spin_unlock_irqrestore(&chip->lock, flags);

      snd_cs4231_calibrate_mute(chip, 0);

      chip->mode = 0;
      mutex_unlock(&chip->open_mutex);
}

/*
 *  timer open/close
 */

static int snd_cs4231_timer_open(struct snd_timer *timer)
{
      struct snd_cs4231 *chip = snd_timer_chip(timer);
      snd_cs4231_open(chip, CS4231_MODE_TIMER);
      return 0;
}

static int snd_cs4231_timer_close(struct snd_timer *timer)
{
      struct snd_cs4231 *chip = snd_timer_chip(timer);
      snd_cs4231_close(chip, CS4231_MODE_TIMER);
      return 0;
}

static struct snd_timer_hardware snd_cs4231_timer_table = {
      .flags            =     SNDRV_TIMER_HW_AUTO,
      .resolution =     9945,
      .ticks            =     65535,
      .open       =     snd_cs4231_timer_open,
      .close            =     snd_cs4231_timer_close,
      .c_resolution     =     snd_cs4231_timer_resolution,
      .start            =     snd_cs4231_timer_start,
      .stop       =     snd_cs4231_timer_stop,
};

/*
 *  ok.. exported functions..
 */

static int snd_cs4231_playback_hw_params(struct snd_pcm_substream *substream,
                               struct snd_pcm_hw_params *hw_params)
{
      struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
      unsigned char new_pdfr;
      int err;

      err = snd_pcm_lib_malloc_pages(substream,
                              params_buffer_bytes(hw_params));
      if (err < 0)
            return err;
      new_pdfr = snd_cs4231_get_format(chip, params_format(hw_params),
                               params_channels(hw_params)) |
            snd_cs4231_get_rate(params_rate(hw_params));
      snd_cs4231_playback_format(chip, hw_params, new_pdfr);

      return 0;
}

static int snd_cs4231_playback_prepare(struct snd_pcm_substream *substream)
{
      struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      unsigned long flags;

      spin_lock_irqsave(&chip->lock, flags);

      chip->image[CS4231_IFACE_CTRL] &= ~(CS4231_PLAYBACK_ENABLE |
                                  CS4231_PLAYBACK_PIO);

      BUG_ON(runtime->period_size > 0xffff + 1);

      chip->p_periods_sent = 0;
      spin_unlock_irqrestore(&chip->lock, flags);

      return 0;
}

static int snd_cs4231_capture_hw_params(struct snd_pcm_substream *substream,
                              struct snd_pcm_hw_params *hw_params)
{
      struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
      unsigned char new_cdfr;
      int err;

      err = snd_pcm_lib_malloc_pages(substream,
                              params_buffer_bytes(hw_params));
      if (err < 0)
            return err;
      new_cdfr = snd_cs4231_get_format(chip, params_format(hw_params),
                               params_channels(hw_params)) |
            snd_cs4231_get_rate(params_rate(hw_params));
      snd_cs4231_capture_format(chip, hw_params, new_cdfr);

      return 0;
}

static int snd_cs4231_capture_prepare(struct snd_pcm_substream *substream)
{
      struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
      unsigned long flags;

      spin_lock_irqsave(&chip->lock, flags);
      chip->image[CS4231_IFACE_CTRL] &= ~(CS4231_RECORD_ENABLE |
                                  CS4231_RECORD_PIO);


      chip->c_periods_sent = 0;
      spin_unlock_irqrestore(&chip->lock, flags);

      return 0;
}

static void snd_cs4231_overrange(struct snd_cs4231 *chip)
{
      unsigned long flags;
      unsigned char res;

      spin_lock_irqsave(&chip->lock, flags);
      res = snd_cs4231_in(chip, CS4231_TEST_INIT);
      spin_unlock_irqrestore(&chip->lock, flags);

      /* detect overrange only above 0dB; may be user selectable? */
      if (res & (0x08 | 0x02))
            chip->capture_substream->runtime->overrange++;
}

static void snd_cs4231_play_callback(struct snd_cs4231 *chip)
{
      if (chip->image[CS4231_IFACE_CTRL] & CS4231_PLAYBACK_ENABLE) {
            snd_pcm_period_elapsed(chip->playback_substream);
            snd_cs4231_advance_dma(&chip->p_dma, chip->playback_substream,
                                  &chip->p_periods_sent);
      }
}

static void snd_cs4231_capture_callback(struct snd_cs4231 *chip)
{
      if (chip->image[CS4231_IFACE_CTRL] & CS4231_RECORD_ENABLE) {
            snd_pcm_period_elapsed(chip->capture_substream);
            snd_cs4231_advance_dma(&chip->c_dma, chip->capture_substream,
                                  &chip->c_periods_sent);
      }
}

static snd_pcm_uframes_t snd_cs4231_playback_pointer(
                              struct snd_pcm_substream *substream)
{
      struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
      struct cs4231_dma_control *dma_cont = &chip->p_dma;
      size_t ptr;

      if (!(chip->image[CS4231_IFACE_CTRL] & CS4231_PLAYBACK_ENABLE))
            return 0;
      ptr = dma_cont->address(dma_cont);
      if (ptr != 0)
            ptr -= substream->runtime->dma_addr;

      return bytes_to_frames(substream->runtime, ptr);
}

static snd_pcm_uframes_t snd_cs4231_capture_pointer(
                              struct snd_pcm_substream *substream)
{
      struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
      struct cs4231_dma_control *dma_cont = &chip->c_dma;
      size_t ptr;

      if (!(chip->image[CS4231_IFACE_CTRL] & CS4231_RECORD_ENABLE))
            return 0;
      ptr = dma_cont->address(dma_cont);
      if (ptr != 0)
            ptr -= substream->runtime->dma_addr;

      return bytes_to_frames(substream->runtime, ptr);
}

static int __init snd_cs4231_probe(struct snd_cs4231 *chip)
{
      unsigned long flags;
      int i;
      int id = 0;
      int vers = 0;
      unsigned char *ptr;

      for (i = 0; i < 50; i++) {
            mb();
            if (__cs4231_readb(chip, CS4231U(chip, REGSEL)) & CS4231_INIT)
                  msleep(2);
            else {
                  spin_lock_irqsave(&chip->lock, flags);
                  snd_cs4231_out(chip, CS4231_MISC_INFO, CS4231_MODE2);
                  id = snd_cs4231_in(chip, CS4231_MISC_INFO) & 0x0f;
                  vers = snd_cs4231_in(chip, CS4231_VERSION);
                  spin_unlock_irqrestore(&chip->lock, flags);
                  if (id == 0x0a)
                        break;      /* this is valid value */
            }
      }
      snd_printdd("cs4231: port = %p, id = 0x%x\n", chip->port, id);
      if (id != 0x0a)
            return -ENODEV;   /* no valid device found */

      spin_lock_irqsave(&chip->lock, flags);

      /* clear any pendings IRQ */
      __cs4231_readb(chip, CS4231U(chip, STATUS));
      __cs4231_writeb(chip, 0, CS4231U(chip, STATUS));
      mb();

      spin_unlock_irqrestore(&chip->lock, flags);

      chip->image[CS4231_MISC_INFO] = CS4231_MODE2;
      chip->image[CS4231_IFACE_CTRL] =
            chip->image[CS4231_IFACE_CTRL] & ~CS4231_SINGLE_DMA;
      chip->image[CS4231_ALT_FEATURE_1] = 0x80;
      chip->image[CS4231_ALT_FEATURE_2] = 0x01;
      if (vers & 0x20)
            chip->image[CS4231_ALT_FEATURE_2] |= 0x02;

      ptr = (unsigned char *) &chip->image;

      snd_cs4231_mce_down(chip);

      spin_lock_irqsave(&chip->lock, flags);

      for (i = 0; i < 32; i++)      /* ok.. fill all CS4231 registers */
            snd_cs4231_out(chip, i, *ptr++);

      spin_unlock_irqrestore(&chip->lock, flags);

      snd_cs4231_mce_up(chip);

      snd_cs4231_mce_down(chip);

      mdelay(2);

      return 0;         /* all things are ok.. */
}

static struct snd_pcm_hardware snd_cs4231_playback = {
      .info             = SNDRV_PCM_INFO_MMAP |
                          SNDRV_PCM_INFO_INTERLEAVED |
                          SNDRV_PCM_INFO_MMAP_VALID |
                          SNDRV_PCM_INFO_SYNC_START,
      .formats          = SNDRV_PCM_FMTBIT_MU_LAW |
                          SNDRV_PCM_FMTBIT_A_LAW |
                          SNDRV_PCM_FMTBIT_IMA_ADPCM |
                          SNDRV_PCM_FMTBIT_U8 |
                          SNDRV_PCM_FMTBIT_S16_LE |
                          SNDRV_PCM_FMTBIT_S16_BE,
      .rates                  = SNDRV_PCM_RATE_KNOT |
                          SNDRV_PCM_RATE_8000_48000,
      .rate_min         = 5510,
      .rate_max         = 48000,
      .channels_min           = 1,
      .channels_max           = 2,
      .buffer_bytes_max = 32 * 1024,
      .period_bytes_min = 64,
      .period_bytes_max = 32 * 1024,
      .periods_min            = 1,
      .periods_max            = 1024,
};

static struct snd_pcm_hardware snd_cs4231_capture = {
      .info             = SNDRV_PCM_INFO_MMAP |
                          SNDRV_PCM_INFO_INTERLEAVED |
                          SNDRV_PCM_INFO_MMAP_VALID |
                          SNDRV_PCM_INFO_SYNC_START,
      .formats          = SNDRV_PCM_FMTBIT_MU_LAW |
                          SNDRV_PCM_FMTBIT_A_LAW |
                          SNDRV_PCM_FMTBIT_IMA_ADPCM |
                          SNDRV_PCM_FMTBIT_U8 |
                          SNDRV_PCM_FMTBIT_S16_LE |
                          SNDRV_PCM_FMTBIT_S16_BE,
      .rates                  = SNDRV_PCM_RATE_KNOT |
                          SNDRV_PCM_RATE_8000_48000,
      .rate_min         = 5510,
      .rate_max         = 48000,
      .channels_min           = 1,
      .channels_max           = 2,
      .buffer_bytes_max = 32 * 1024,
      .period_bytes_min = 64,
      .period_bytes_max = 32 * 1024,
      .periods_min            = 1,
      .periods_max            = 1024,
};

static int snd_cs4231_playback_open(struct snd_pcm_substream *substream)
{
      struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      int err;

      runtime->hw = snd_cs4231_playback;

      err = snd_cs4231_open(chip, CS4231_MODE_PLAY);
      if (err < 0) {
            snd_free_pages(runtime->dma_area, runtime->dma_bytes);
            return err;
      }
      chip->playback_substream = substream;
      chip->p_periods_sent = 0;
      snd_pcm_set_sync(substream);
      snd_cs4231_xrate(runtime);

      return 0;
}

static int snd_cs4231_capture_open(struct snd_pcm_substream *substream)
{
      struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      int err;

      runtime->hw = snd_cs4231_capture;

      err = snd_cs4231_open(chip, CS4231_MODE_RECORD);
      if (err < 0) {
            snd_free_pages(runtime->dma_area, runtime->dma_bytes);
            return err;
      }
      chip->capture_substream = substream;
      chip->c_periods_sent = 0;
      snd_pcm_set_sync(substream);
      snd_cs4231_xrate(runtime);

      return 0;
}

static int snd_cs4231_playback_close(struct snd_pcm_substream *substream)
{
      struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);

      snd_cs4231_close(chip, CS4231_MODE_PLAY);
      chip->playback_substream = NULL;

      return 0;
}

static int snd_cs4231_capture_close(struct snd_pcm_substream *substream)
{
      struct snd_cs4231 *chip = snd_pcm_substream_chip(substream);

      snd_cs4231_close(chip, CS4231_MODE_RECORD);
      chip->capture_substream = NULL;

      return 0;
}

/* XXX We can do some power-management, in particular on EBUS using
 * XXX the audio AUXIO register...
 */

static struct snd_pcm_ops snd_cs4231_playback_ops = {
      .open       =     snd_cs4231_playback_open,
      .close            =     snd_cs4231_playback_close,
      .ioctl            =     snd_pcm_lib_ioctl,
      .hw_params  =     snd_cs4231_playback_hw_params,
      .hw_free    =     snd_pcm_lib_free_pages,
      .prepare    =     snd_cs4231_playback_prepare,
      .trigger    =     snd_cs4231_trigger,
      .pointer    =     snd_cs4231_playback_pointer,
};

static struct snd_pcm_ops snd_cs4231_capture_ops = {
      .open       =     snd_cs4231_capture_open,
      .close            =     snd_cs4231_capture_close,
      .ioctl            =     snd_pcm_lib_ioctl,
      .hw_params  =     snd_cs4231_capture_hw_params,
      .hw_free    =     snd_pcm_lib_free_pages,
      .prepare    =     snd_cs4231_capture_prepare,
      .trigger    =     snd_cs4231_trigger,
      .pointer    =     snd_cs4231_capture_pointer,
};

static int __init snd_cs4231_pcm(struct snd_card *card)
{
      struct snd_cs4231 *chip = card->private_data;
      struct snd_pcm *pcm;
      int err;

      err = snd_pcm_new(card, "CS4231", 0, 1, 1, &pcm);
      if (err < 0)
            return err;

      snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
                  &snd_cs4231_playback_ops);
      snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
                  &snd_cs4231_capture_ops);

      /* global setup */
      pcm->private_data = chip;
      pcm->info_flags = SNDRV_PCM_INFO_JOINT_DUPLEX;
      strcpy(pcm->name, "CS4231");

      chip->p_dma.preallocate(chip, pcm);

      chip->pcm = pcm;

      return 0;
}

static int __init snd_cs4231_timer(struct snd_card *card)
{
      struct snd_cs4231 *chip = card->private_data;
      struct snd_timer *timer;
      struct snd_timer_id tid;
      int err;

      /* Timer initialization */
      tid.dev_class = SNDRV_TIMER_CLASS_CARD;
      tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE;
      tid.card = card->number;
      tid.device = 0;
      tid.subdevice = 0;
      err = snd_timer_new(card, "CS4231", &tid, &timer);
      if (err < 0)
            return err;
      strcpy(timer->name, "CS4231");
      timer->private_data = chip;
      timer->hw = snd_cs4231_timer_table;
      chip->timer = timer;

      return 0;
}

/*
 *  MIXER part
 */

static int snd_cs4231_info_mux(struct snd_kcontrol *kcontrol,
                         struct snd_ctl_elem_info *uinfo)
{
      static char *texts[4] = {
            "Line", "CD", "Mic", "Mix"
      };

      uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
      uinfo->count = 2;
      uinfo->value.enumerated.items = 4;
      if (uinfo->value.enumerated.item > 3)
            uinfo->value.enumerated.item = 3;
      strcpy(uinfo->value.enumerated.name,
            texts[uinfo->value.enumerated.item]);

      return 0;
}

static int snd_cs4231_get_mux(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_value *ucontrol)
{
      struct snd_cs4231 *chip = snd_kcontrol_chip(kcontrol);
      unsigned long flags;

      spin_lock_irqsave(&chip->lock, flags);
      ucontrol->value.enumerated.item[0] =
            (chip->image[CS4231_LEFT_INPUT] & CS4231_MIXS_ALL) >> 6;
      ucontrol->value.enumerated.item[1] =
            (chip->image[CS4231_RIGHT_INPUT] & CS4231_MIXS_ALL) >> 6;
      spin_unlock_irqrestore(&chip->lock, flags);

      return 0;
}

static int snd_cs4231_put_mux(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_value *ucontrol)
{
      struct snd_cs4231 *chip = snd_kcontrol_chip(kcontrol);
      unsigned long flags;
      unsigned short left, right;
      int change;

      if (ucontrol->value.enumerated.item[0] > 3 ||
          ucontrol->value.enumerated.item[1] > 3)
            return -EINVAL;
      left = ucontrol->value.enumerated.item[0] << 6;
      right = ucontrol->value.enumerated.item[1] << 6;

      spin_lock_irqsave(&chip->lock, flags);

      left = (chip->image[CS4231_LEFT_INPUT] & ~CS4231_MIXS_ALL) | left;
      right = (chip->image[CS4231_RIGHT_INPUT] & ~CS4231_MIXS_ALL) | right;
      change = left != chip->image[CS4231_LEFT_INPUT] ||
             right != chip->image[CS4231_RIGHT_INPUT];
      snd_cs4231_out(chip, CS4231_LEFT_INPUT, left);
      snd_cs4231_out(chip, CS4231_RIGHT_INPUT, right);

      spin_unlock_irqrestore(&chip->lock, flags);

      return change;
}

static int snd_cs4231_info_single(struct snd_kcontrol *kcontrol,
                          struct snd_ctl_elem_info *uinfo)
{
      int mask = (kcontrol->private_value >> 16) & 0xff;

      uinfo->type = (mask == 1) ?
            SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
      uinfo->count = 1;
      uinfo->value.integer.min = 0;
      uinfo->value.integer.max = mask;

      return 0;
}

static int snd_cs4231_get_single(struct snd_kcontrol *kcontrol,
                         struct snd_ctl_elem_value *ucontrol)
{
      struct snd_cs4231 *chip = snd_kcontrol_chip(kcontrol);
      unsigned long flags;
      int reg = kcontrol->private_value & 0xff;
      int shift = (kcontrol->private_value >> 8) & 0xff;
      int mask = (kcontrol->private_value >> 16) & 0xff;
      int invert = (kcontrol->private_value >> 24) & 0xff;

      spin_lock_irqsave(&chip->lock, flags);

      ucontrol->value.integer.value[0] = (chip->image[reg] >> shift) & mask;

      spin_unlock_irqrestore(&chip->lock, flags);

      if (invert)
            ucontrol->value.integer.value[0] =
                  (mask - ucontrol->value.integer.value[0]);

      return 0;
}

static int snd_cs4231_put_single(struct snd_kcontrol *kcontrol,
                         struct snd_ctl_elem_value *ucontrol)
{
      struct snd_cs4231 *chip = snd_kcontrol_chip(kcontrol);
      unsigned long flags;
      int reg = kcontrol->private_value & 0xff;
      int shift = (kcontrol->private_value >> 8) & 0xff;
      int mask = (kcontrol->private_value >> 16) & 0xff;
      int invert = (kcontrol->private_value >> 24) & 0xff;
      int change;
      unsigned short val;

      val = (ucontrol->value.integer.value[0] & mask);
      if (invert)
            val = mask - val;
      val <<= shift;

      spin_lock_irqsave(&chip->lock, flags);

      val = (chip->image[reg] & ~(mask << shift)) | val;
      change = val != chip->image[reg];
      snd_cs4231_out(chip, reg, val);

      spin_unlock_irqrestore(&chip->lock, flags);

      return change;
}

static int snd_cs4231_info_double(struct snd_kcontrol *kcontrol,
                          struct snd_ctl_elem_info *uinfo)
{
      int mask = (kcontrol->private_value >> 24) & 0xff;

      uinfo->type = mask == 1 ?
            SNDRV_CTL_ELEM_TYPE_BOOLEAN : SNDRV_CTL_ELEM_TYPE_INTEGER;
      uinfo->count = 2;
      uinfo->value.integer.min = 0;
      uinfo->value.integer.max = mask;

      return 0;
}

static int snd_cs4231_get_double(struct snd_kcontrol *kcontrol,
                         struct snd_ctl_elem_value *ucontrol)
{
      struct snd_cs4231 *chip = snd_kcontrol_chip(kcontrol);
      unsigned long flags;
      int left_reg = kcontrol->private_value & 0xff;
      int right_reg = (kcontrol->private_value >> 8) & 0xff;
      int shift_left = (kcontrol->private_value >> 16) & 0x07;
      int shift_right = (kcontrol->private_value >> 19) & 0x07;
      int mask = (kcontrol->private_value >> 24) & 0xff;
      int invert = (kcontrol->private_value >> 22) & 1;

      spin_lock_irqsave(&chip->lock, flags);

      ucontrol->value.integer.value[0] =
            (chip->image[left_reg] >> shift_left) & mask;
      ucontrol->value.integer.value[1] =
            (chip->image[right_reg] >> shift_right) & mask;

      spin_unlock_irqrestore(&chip->lock, flags);

      if (invert) {
            ucontrol->value.integer.value[0] =
                  (mask - ucontrol->value.integer.value[0]);
            ucontrol->value.integer.value[1] =
                  (mask - ucontrol->value.integer.value[1]);
      }

      return 0;
}

static int snd_cs4231_put_double(struct snd_kcontrol *kcontrol,
                         struct snd_ctl_elem_value *ucontrol)
{
      struct snd_cs4231 *chip = snd_kcontrol_chip(kcontrol);
      unsigned long flags;
      int left_reg = kcontrol->private_value & 0xff;
      int right_reg = (kcontrol->private_value >> 8) & 0xff;
      int shift_left = (kcontrol->private_value >> 16) & 0x07;
      int shift_right = (kcontrol->private_value >> 19) & 0x07;
      int mask = (kcontrol->private_value >> 24) & 0xff;
      int invert = (kcontrol->private_value >> 22) & 1;
      int change;
      unsigned short val1, val2;

      val1 = ucontrol->value.integer.value[0] & mask;
      val2 = ucontrol->value.integer.value[1] & mask;
      if (invert) {
            val1 = mask - val1;
            val2 = mask - val2;
      }
      val1 <<= shift_left;
      val2 <<= shift_right;

      spin_lock_irqsave(&chip->lock, flags);

      val1 = (chip->image[left_reg] & ~(mask << shift_left)) | val1;
      val2 = (chip->image[right_reg] & ~(mask << shift_right)) | val2;
      change = val1 != chip->image[left_reg];
      change |= val2 != chip->image[right_reg];
      snd_cs4231_out(chip, left_reg, val1);
      snd_cs4231_out(chip, right_reg, val2);

      spin_unlock_irqrestore(&chip->lock, flags);

      return change;
}

#define CS4231_SINGLE(xname, xindex, reg, shift, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), .index = (xindex), \
  .info = snd_cs4231_info_single,   \
  .get = snd_cs4231_get_single, .put = snd_cs4231_put_single,     \
  .private_value = (reg) | ((shift) << 8) | ((mask) << 16) | ((invert) << 24) }

#define CS4231_DOUBLE(xname, xindex, left_reg, right_reg, shift_left, \
                  shift_right, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = (xname), .index = (xindex), \
  .info = snd_cs4231_info_double,   \
  .get = snd_cs4231_get_double, .put = snd_cs4231_put_double,     \
  .private_value = (left_reg) | ((right_reg) << 8) | ((shift_left) << 16) | \
               ((shift_right) << 19) | ((mask) << 24) | ((invert) << 22) }

static struct snd_kcontrol_new snd_cs4231_controls[] __initdata = {
CS4231_DOUBLE("PCM Playback Switch", 0, CS4231_LEFT_OUTPUT,
            CS4231_RIGHT_OUTPUT, 7, 7, 1, 1),
CS4231_DOUBLE("PCM Playback Volume", 0, CS4231_LEFT_OUTPUT,
            CS4231_RIGHT_OUTPUT, 0, 0, 63, 1),
CS4231_DOUBLE("Line Playback Switch", 0, CS4231_LEFT_LINE_IN,
            CS4231_RIGHT_LINE_IN, 7, 7, 1, 1),
CS4231_DOUBLE("Line Playback Volume", 0, CS4231_LEFT_LINE_IN,
            CS4231_RIGHT_LINE_IN, 0, 0, 31, 1),
CS4231_DOUBLE("Aux Playback Switch", 0, CS4231_AUX1_LEFT_INPUT,
            CS4231_AUX1_RIGHT_INPUT, 7, 7, 1, 1),
CS4231_DOUBLE("Aux Playback Volume", 0, CS4231_AUX1_LEFT_INPUT,
            CS4231_AUX1_RIGHT_INPUT, 0, 0, 31, 1),
CS4231_DOUBLE("Aux Playback Switch", 1, CS4231_AUX2_LEFT_INPUT,
            CS4231_AUX2_RIGHT_INPUT, 7, 7, 1, 1),
CS4231_DOUBLE("Aux Playback Volume", 1, CS4231_AUX2_LEFT_INPUT,
            CS4231_AUX2_RIGHT_INPUT, 0, 0, 31, 1),
CS4231_SINGLE("Mono Playback Switch", 0, CS4231_MONO_CTRL, 7, 1, 1),
CS4231_SINGLE("Mono Playback Volume", 0, CS4231_MONO_CTRL, 0, 15, 1),
CS4231_SINGLE("Mono Output Playback Switch", 0, CS4231_MONO_CTRL, 6, 1, 1),
CS4231_SINGLE("Mono Output Playback Bypass", 0, CS4231_MONO_CTRL, 5, 1, 0),
CS4231_DOUBLE("Capture Volume", 0, CS4231_LEFT_INPUT, CS4231_RIGHT_INPUT, 0, 0,
            15, 0),
{
      .iface      = SNDRV_CTL_ELEM_IFACE_MIXER,
      .name = "Capture Source",
      .info = snd_cs4231_info_mux,
      .get  = snd_cs4231_get_mux,
      .put  = snd_cs4231_put_mux,
},
CS4231_DOUBLE("Mic Boost", 0, CS4231_LEFT_INPUT, CS4231_RIGHT_INPUT, 5, 5,
            1, 0),
CS4231_SINGLE("Loopback Capture Switch", 0, CS4231_LOOPBACK, 0, 1, 0),
CS4231_SINGLE("Loopback Capture Volume", 0, CS4231_LOOPBACK, 2, 63, 1),
/* SPARC specific uses of XCTL{0,1} general purpose outputs.  */
CS4231_SINGLE("Line Out Switch", 0, CS4231_PIN_CTRL, 6, 1, 1),
CS4231_SINGLE("Headphone Out Switch", 0, CS4231_PIN_CTRL, 7, 1, 1)
};

static int __init snd_cs4231_mixer(struct snd_card *card)
{
      struct snd_cs4231 *chip = card->private_data;
      int err, idx;

      snd_assert(chip != NULL && chip->pcm != NULL, return -EINVAL);

      strcpy(card->mixername, chip->pcm->name);

      for (idx = 0; idx < ARRAY_SIZE(snd_cs4231_controls); idx++) {
            err = snd_ctl_add(card,
                         snd_ctl_new1(&snd_cs4231_controls[idx], chip));
            if (err < 0)
                  return err;
      }
      return 0;
}

static int dev;

static int __init cs4231_attach_begin(struct snd_card **rcard)
{
      struct snd_card *card;
      struct snd_cs4231 *chip;

      *rcard = NULL;

      if (dev >= SNDRV_CARDS)
            return -ENODEV;

      if (!enable[dev]) {
            dev++;
            return -ENOENT;
      }

      card = snd_card_new(index[dev], id[dev], THIS_MODULE,
                      sizeof(struct snd_cs4231));
      if (card == NULL)
            return -ENOMEM;

      strcpy(card->driver, "CS4231");
      strcpy(card->shortname, "Sun CS4231");

      chip = card->private_data;
      chip->card = card;

      *rcard = card;
      return 0;
}

static int __init cs4231_attach_finish(struct snd_card *card)
{
      struct snd_cs4231 *chip = card->private_data;
      int err;

      err = snd_cs4231_pcm(card);
      if (err < 0)
            goto out_err;

      err = snd_cs4231_mixer(card);
      if (err < 0)
            goto out_err;

      err = snd_cs4231_timer(card);
      if (err < 0)
            goto out_err;

      err = snd_card_register(card);
      if (err < 0)
            goto out_err;

      chip->next = cs4231_list;
      cs4231_list = chip;

      dev++;
      return 0;

out_err:
      snd_card_free(card);
      return err;
}

#ifdef SBUS_SUPPORT

static irqreturn_t snd_cs4231_sbus_interrupt(int irq, void *dev_id)
{
      unsigned long flags;
      unsigned char status;
      u32 csr;
      struct snd_cs4231 *chip = dev_id;

      /*This is IRQ is not raised by the cs4231*/
      if (!(__cs4231_readb(chip, CS4231U(chip, STATUS)) & CS4231_GLOBALIRQ))
            return IRQ_NONE;

      /* ACK the APC interrupt. */
      csr = sbus_readl(chip->port + APCCSR);

      sbus_writel(csr, chip->port + APCCSR);

      if ((csr & APC_PDMA_READY) &&
          (csr & APC_PLAY_INT) &&
          (csr & APC_XINT_PNVA) &&
          !(csr & APC_XINT_EMPT))
                  snd_cs4231_play_callback(chip);

      if ((csr & APC_CDMA_READY) &&
          (csr & APC_CAPT_INT) &&
          (csr & APC_XINT_CNVA) &&
          !(csr & APC_XINT_EMPT))
                  snd_cs4231_capture_callback(chip);

      status = snd_cs4231_in(chip, CS4231_IRQ_STATUS);

      if (status & CS4231_TIMER_IRQ) {
            if (chip->timer)
                  snd_timer_interrupt(chip->timer, chip->timer->sticks);
      }

      if ((status & CS4231_RECORD_IRQ) && (csr & APC_CDMA_READY))
            snd_cs4231_overrange(chip);

      /* ACK the CS4231 interrupt. */
      spin_lock_irqsave(&chip->lock, flags);
      snd_cs4231_outm(chip, CS4231_IRQ_STATUS, ~CS4231_ALL_IRQS | ~status, 0);
      spin_unlock_irqrestore(&chip->lock, flags);

      return IRQ_HANDLED;
}

/*
 * SBUS DMA routines
 */

static int sbus_dma_request(struct cs4231_dma_control *dma_cont,
                      dma_addr_t bus_addr, size_t len)
{
      unsigned long flags;
      u32 test, csr;
      int err;
      struct sbus_dma_info *base = &dma_cont->sbus_info;

      if (len >= (1 << 24))
            return -EINVAL;
      spin_lock_irqsave(&base->lock, flags);
      csr = sbus_readl(base->regs + APCCSR);
      err = -EINVAL;
      test = APC_CDMA_READY;
      if (base->dir == APC_PLAY)
            test = APC_PDMA_READY;
      if (!(csr & test))
            goto out;
      err = -EBUSY;
      test = APC_XINT_CNVA;
      if (base->dir == APC_PLAY)
            test = APC_XINT_PNVA;
      if (!(csr & test))
            goto out;
      err = 0;
      sbus_writel(bus_addr, base->regs + base->dir + APCNVA);
      sbus_writel(len, base->regs + base->dir + APCNC);
out:
      spin_unlock_irqrestore(&base->lock, flags);
      return err;
}

static void sbus_dma_prepare(struct cs4231_dma_control *dma_cont, int d)
{
      unsigned long flags;
      u32 csr, test;
      struct sbus_dma_info *base = &dma_cont->sbus_info;

      spin_lock_irqsave(&base->lock, flags);
      csr = sbus_readl(base->regs + APCCSR);
      test =  APC_GENL_INT | APC_PLAY_INT | APC_XINT_ENA |
            APC_XINT_PLAY | APC_XINT_PEMP | APC_XINT_GENL |
             APC_XINT_PENA;
      if (base->dir == APC_RECORD)
            test = APC_GENL_INT | APC_CAPT_INT | APC_XINT_ENA |
                  APC_XINT_CAPT | APC_XINT_CEMP | APC_XINT_GENL;
      csr |= test;
      sbus_writel(csr, base->regs + APCCSR);
      spin_unlock_irqrestore(&base->lock, flags);
}

static void sbus_dma_enable(struct cs4231_dma_control *dma_cont, int on)
{
      unsigned long flags;
      u32 csr, shift;
      struct sbus_dma_info *base = &dma_cont->sbus_info;

      spin_lock_irqsave(&base->lock, flags);
      if (!on) {
            sbus_writel(0, base->regs + base->dir + APCNC);
            sbus_writel(0, base->regs + base->dir + APCNVA);
            if (base->dir == APC_PLAY) {
                  sbus_writel(0, base->regs + base->dir + APCC);
                  sbus_writel(0, base->regs + base->dir + APCVA);
            }

            udelay(1200);
      }
      csr = sbus_readl(base->regs + APCCSR);
      shift = 0;
      if (base->dir == APC_PLAY)
            shift = 1;
      if (on)
            csr &= ~(APC_CPAUSE << shift);
      else
            csr |= (APC_CPAUSE << shift);
      sbus_writel(csr, base->regs + APCCSR);
      if (on)
            csr |= (APC_CDMA_READY << shift);
      else
            csr &= ~(APC_CDMA_READY << shift);
      sbus_writel(csr, base->regs + APCCSR);

      spin_unlock_irqrestore(&base->lock, flags);
}

static unsigned int sbus_dma_addr(struct cs4231_dma_control *dma_cont)
{
      struct sbus_dma_info *base = &dma_cont->sbus_info;

      return sbus_readl(base->regs + base->dir + APCVA);
}

static void sbus_dma_preallocate(struct snd_cs4231 *chip, struct snd_pcm *pcm)
{
      snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_SBUS,
                              snd_dma_sbus_data(chip->dev_u.sdev),
                              64 * 1024, 128 * 1024);
}

/*
 * Init and exit routines
 */

static int snd_cs4231_sbus_free(struct snd_cs4231 *chip)
{
      if (chip->irq[0])
            free_irq(chip->irq[0], chip);

      if (chip->port)
            sbus_iounmap(chip->port, chip->regs_size);

      return 0;
}

static int snd_cs4231_sbus_dev_free(struct snd_device *device)
{
      struct snd_cs4231 *cp = device->device_data;

      return snd_cs4231_sbus_free(cp);
}

static struct snd_device_ops snd_cs4231_sbus_dev_ops = {
      .dev_free   =     snd_cs4231_sbus_dev_free,
};

static int __init snd_cs4231_sbus_create(struct snd_card *card,
                               struct sbus_dev *sdev,
                               int dev)
{
      struct snd_cs4231 *chip = card->private_data;
      int err;

      spin_lock_init(&chip->lock);
      spin_lock_init(&chip->c_dma.sbus_info.lock);
      spin_lock_init(&chip->p_dma.sbus_info.lock);
      mutex_init(&chip->mce_mutex);
      mutex_init(&chip->open_mutex);
      chip->dev_u.sdev = sdev;
      chip->regs_size = sdev->reg_addrs[0].reg_size;
      memcpy(&chip->image, &snd_cs4231_original_image,
             sizeof(snd_cs4231_original_image));

      chip->port = sbus_ioremap(&sdev->resource[0], 0,
                          chip->regs_size, "cs4231");
      if (!chip->port) {
            snd_printdd("cs4231-%d: Unable to map chip registers.\n", dev);
            return -EIO;
      }

      chip->c_dma.sbus_info.regs = chip->port;
      chip->p_dma.sbus_info.regs = chip->port;
      chip->c_dma.sbus_info.dir = APC_RECORD;
      chip->p_dma.sbus_info.dir = APC_PLAY;

      chip->p_dma.prepare = sbus_dma_prepare;
      chip->p_dma.enable = sbus_dma_enable;
      chip->p_dma.request = sbus_dma_request;
      chip->p_dma.address = sbus_dma_addr;
      chip->p_dma.preallocate = sbus_dma_preallocate;

      chip->c_dma.prepare = sbus_dma_prepare;
      chip->c_dma.enable = sbus_dma_enable;
      chip->c_dma.request = sbus_dma_request;
      chip->c_dma.address = sbus_dma_addr;
      chip->c_dma.preallocate = sbus_dma_preallocate;

      if (request_irq(sdev->irqs[0], snd_cs4231_sbus_interrupt,
                  IRQF_SHARED, "cs4231", chip)) {
            snd_printdd("cs4231-%d: Unable to grab SBUS IRQ %d\n",
                      dev, sdev->irqs[0]);
            snd_cs4231_sbus_free(chip);
            return -EBUSY;
      }
      chip->irq[0] = sdev->irqs[0];

      if (snd_cs4231_probe(chip) < 0) {
            snd_cs4231_sbus_free(chip);
            return -ENODEV;
      }
      snd_cs4231_init(chip);

      if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
                          chip, &snd_cs4231_sbus_dev_ops)) < 0) {
            snd_cs4231_sbus_free(chip);
            return err;
      }

      return 0;
}

static int __init cs4231_sbus_attach(struct sbus_dev *sdev)
{
      struct resource *rp = &sdev->resource[0];
      struct snd_card *card;
      int err;

      err = cs4231_attach_begin(&card);
      if (err)
            return err;

      sprintf(card->longname, "%s at 0x%02lx:0x%016Lx, irq %d",
            card->shortname,
            rp->flags & 0xffL,
            (unsigned long long)rp->start,
            sdev->irqs[0]);

      err = snd_cs4231_sbus_create(card, sdev, dev);
      if (err < 0) {
            snd_card_free(card);
            return err;
      }

      return cs4231_attach_finish(card);
}
#endif

#ifdef EBUS_SUPPORT

static void snd_cs4231_ebus_play_callback(struct ebus_dma_info *p, int event,
                                void *cookie)
{
      struct snd_cs4231 *chip = cookie;

      snd_cs4231_play_callback(chip);
}

static void snd_cs4231_ebus_capture_callback(struct ebus_dma_info *p,
                                   int event, void *cookie)
{
      struct snd_cs4231 *chip = cookie;

      snd_cs4231_capture_callback(chip);
}

/*
 * EBUS DMA wrappers
 */

static int _ebus_dma_request(struct cs4231_dma_control *dma_cont,
                       dma_addr_t bus_addr, size_t len)
{
      return ebus_dma_request(&dma_cont->ebus_info, bus_addr, len);
}

static void _ebus_dma_enable(struct cs4231_dma_control *dma_cont, int on)
{
      ebus_dma_enable(&dma_cont->ebus_info, on);
}

static void _ebus_dma_prepare(struct cs4231_dma_control *dma_cont, int dir)
{
      ebus_dma_prepare(&dma_cont->ebus_info, dir);
}

static unsigned int _ebus_dma_addr(struct cs4231_dma_control *dma_cont)
{
      return ebus_dma_addr(&dma_cont->ebus_info);
}

static void _ebus_dma_preallocate(struct snd_cs4231 *chip, struct snd_pcm *pcm)
{
      snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
                              snd_dma_pci_data(chip->dev_u.pdev),
                              64*1024, 128*1024);
}

/*
 * Init and exit routines
 */

static int snd_cs4231_ebus_free(struct snd_cs4231 *chip)
{
      if (chip->c_dma.ebus_info.regs) {
            ebus_dma_unregister(&chip->c_dma.ebus_info);
            iounmap(chip->c_dma.ebus_info.regs);
      }
      if (chip->p_dma.ebus_info.regs) {
            ebus_dma_unregister(&chip->p_dma.ebus_info);
            iounmap(chip->p_dma.ebus_info.regs);
      }

      if (chip->port)
            iounmap(chip->port);

      return 0;
}

static int snd_cs4231_ebus_dev_free(struct snd_device *device)
{
      struct snd_cs4231 *cp = device->device_data;

      return snd_cs4231_ebus_free(cp);
}

static struct snd_device_ops snd_cs4231_ebus_dev_ops = {
      .dev_free   =     snd_cs4231_ebus_dev_free,
};

static int __init snd_cs4231_ebus_create(struct snd_card *card,
                               struct linux_ebus_device *edev,
                               int dev)
{
      struct snd_cs4231 *chip = card->private_data;
      int err;

      spin_lock_init(&chip->lock);
      spin_lock_init(&chip->c_dma.ebus_info.lock);
      spin_lock_init(&chip->p_dma.ebus_info.lock);
      mutex_init(&chip->mce_mutex);
      mutex_init(&chip->open_mutex);
      chip->flags |= CS4231_FLAG_EBUS;
      chip->dev_u.pdev = edev->bus->self;
      memcpy(&chip->image, &snd_cs4231_original_image,
             sizeof(snd_cs4231_original_image));
      strcpy(chip->c_dma.ebus_info.name, "cs4231(capture)");
      chip->c_dma.ebus_info.flags = EBUS_DMA_FLAG_USE_EBDMA_HANDLER;
      chip->c_dma.ebus_info.callback = snd_cs4231_ebus_capture_callback;
      chip->c_dma.ebus_info.client_cookie = chip;
      chip->c_dma.ebus_info.irq = edev->irqs[0];
      strcpy(chip->p_dma.ebus_info.name, "cs4231(play)");
      chip->p_dma.ebus_info.flags = EBUS_DMA_FLAG_USE_EBDMA_HANDLER;
      chip->p_dma.ebus_info.callback = snd_cs4231_ebus_play_callback;
      chip->p_dma.ebus_info.client_cookie = chip;
      chip->p_dma.ebus_info.irq = edev->irqs[1];

      chip->p_dma.prepare = _ebus_dma_prepare;
      chip->p_dma.enable = _ebus_dma_enable;
      chip->p_dma.request = _ebus_dma_request;
      chip->p_dma.address = _ebus_dma_addr;
      chip->p_dma.preallocate = _ebus_dma_preallocate;

      chip->c_dma.prepare = _ebus_dma_prepare;
      chip->c_dma.enable = _ebus_dma_enable;
      chip->c_dma.request = _ebus_dma_request;
      chip->c_dma.address = _ebus_dma_addr;
      chip->c_dma.preallocate = _ebus_dma_preallocate;

      chip->port = ioremap(edev->resource[0].start, 0x10);
      chip->p_dma.ebus_info.regs = ioremap(edev->resource[1].start, 0x10);
      chip->c_dma.ebus_info.regs = ioremap(edev->resource[2].start, 0x10);
      if (!chip->port || !chip->p_dma.ebus_info.regs ||
          !chip->c_dma.ebus_info.regs) {
            snd_cs4231_ebus_free(chip);
            snd_printdd("cs4231-%d: Unable to map chip registers.\n", dev);
            return -EIO;
      }

      if (ebus_dma_register(&chip->c_dma.ebus_info)) {
            snd_cs4231_ebus_free(chip);
            snd_printdd("cs4231-%d: Unable to register EBUS capture DMA\n",
                      dev);
            return -EBUSY;
      }
      if (ebus_dma_irq_enable(&chip->c_dma.ebus_info, 1)) {
            snd_cs4231_ebus_free(chip);
            snd_printdd("cs4231-%d: Unable to enable EBUS capture IRQ\n",
                      dev);
            return -EBUSY;
      }

      if (ebus_dma_register(&chip->p_dma.ebus_info)) {
            snd_cs4231_ebus_free(chip);
            snd_printdd("cs4231-%d: Unable to register EBUS play DMA\n",
                      dev);
            return -EBUSY;
      }
      if (ebus_dma_irq_enable(&chip->p_dma.ebus_info, 1)) {
            snd_cs4231_ebus_free(chip);
            snd_printdd("cs4231-%d: Unable to enable EBUS play IRQ\n", dev);
            return -EBUSY;
      }

      if (snd_cs4231_probe(chip) < 0) {
            snd_cs4231_ebus_free(chip);
            return -ENODEV;
      }
      snd_cs4231_init(chip);

      if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL,
                          chip, &snd_cs4231_ebus_dev_ops)) < 0) {
            snd_cs4231_ebus_free(chip);
            return err;
      }

      return 0;
}

static int __init cs4231_ebus_attach(struct linux_ebus_device *edev)
{
      struct snd_card *card;
      int err;

      err = cs4231_attach_begin(&card);
      if (err)
            return err;

      sprintf(card->longname, "%s at 0x%lx, irq %d",
            card->shortname,
            edev->resource[0].start,
            edev->irqs[0]);

      err = snd_cs4231_ebus_create(card, edev, dev);
      if (err < 0) {
            snd_card_free(card);
            return err;
      }

      return cs4231_attach_finish(card);
}
#endif

static int __init cs4231_init(void)
{
#ifdef SBUS_SUPPORT
      struct sbus_bus *sbus;
      struct sbus_dev *sdev;
#endif
#ifdef EBUS_SUPPORT
      struct linux_ebus *ebus;
      struct linux_ebus_device *edev;
#endif
      int found;

      found = 0;

#ifdef SBUS_SUPPORT
      for_all_sbusdev(sdev, sbus) {
            if (!strcmp(sdev->prom_name, "SUNW,CS4231")) {
                  if (cs4231_sbus_attach(sdev) == 0)
                        found++;
            }
      }
#endif
#ifdef EBUS_SUPPORT
      for_each_ebus(ebus) {
            for_each_ebusdev(edev, ebus) {
                  int match = 0;

                  if (!strcmp(edev->prom_node->name, "SUNW,CS4231")) {
                        match = 1;
                  } else if (!strcmp(edev->prom_node->name, "audio")) {
                        const char *compat;

                        compat = of_get_property(edev->prom_node,
                                           "compatible", NULL);
                        if (compat && !strcmp(compat, "SUNW,CS4231"))
                              match = 1;
                  }

                  if (match &&
                      cs4231_ebus_attach(edev) == 0)
                        found++;
            }
      }
#endif


      return (found > 0) ? 0 : -EIO;
}

static void __exit cs4231_exit(void)
{
      struct snd_cs4231 *p = cs4231_list;

      while (p != NULL) {
            struct snd_cs4231 *next = p->next;

            snd_card_free(p->card);

            p = next;
      }

      cs4231_list = NULL;
}

module_init(cs4231_init);
module_exit(cs4231_exit);

Generated by  Doxygen 1.6.0   Back to index