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vx_core.c

/*
 * Driver for Digigram VX soundcards
 *
 * Hardware core part
 *
 * Copyright (c) 2002 by Takashi Iwai <tiwai@suse.de>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */

#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/firmware.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/asoundef.h>
#include <sound/info.h>
#include <asm/io.h>
#include <sound/vx_core.h>
#include "vx_cmd.h"

MODULE_AUTHOR("Takashi Iwai <tiwai@suse.de>");
MODULE_DESCRIPTION("Common routines for Digigram VX drivers");
MODULE_LICENSE("GPL");


/*
 * vx_check_reg_bit - wait for the specified bit is set/reset on a register
 * @reg: register to check
 * @mask: bit mask
 * @bit: resultant bit to be checked
 * @time: time-out of loop in msec
 *
 * returns zero if a bit matches, or a negative error code.
 */
int snd_vx_check_reg_bit(struct vx_core *chip, int reg, int mask, int bit, int time)
{
      unsigned long end_time = jiffies + (time * HZ + 999) / 1000;
#ifdef CONFIG_SND_DEBUG
      static char *reg_names[VX_REG_MAX] = {
            "ICR", "CVR", "ISR", "IVR", "RXH", "RXM", "RXL",
            "DMA", "CDSP", "RFREQ", "RUER/V2", "DATA", "MEMIRQ",
            "ACQ", "BIT0", "BIT1", "MIC0", "MIC1", "MIC2",
            "MIC3", "INTCSR", "CNTRL", "GPIOC",
            "LOFREQ", "HIFREQ", "CSUER", "RUER"
      };
#endif
      do {
            if ((snd_vx_inb(chip, reg) & mask) == bit)
                  return 0;
            //msleep(10);
      } while (time_after_eq(end_time, jiffies));
      snd_printd(KERN_DEBUG "vx_check_reg_bit: timeout, reg=%s, mask=0x%x, val=0x%x\n", reg_names[reg], mask, snd_vx_inb(chip, reg));
      return -EIO;
}

EXPORT_SYMBOL(snd_vx_check_reg_bit);

/*
 * vx_send_irq_dsp - set command irq bit
 * @num: the requested IRQ type, IRQ_XXX
 *
 * this triggers the specified IRQ request
 * returns 0 if successful, or a negative error code.
 * 
 */
static int vx_send_irq_dsp(struct vx_core *chip, int num)
{
      int nirq;

      /* wait for Hc = 0 */
      if (snd_vx_check_reg_bit(chip, VX_CVR, CVR_HC, 0, 200) < 0)
            return -EIO;

      nirq = num;
      if (vx_has_new_dsp(chip))
            nirq += VXP_IRQ_OFFSET;
      vx_outb(chip, CVR, (nirq >> 1) | CVR_HC);
      return 0;
}


/*
 * vx_reset_chk - reset CHK bit on ISR
 *
 * returns 0 if successful, or a negative error code.
 */
static int vx_reset_chk(struct vx_core *chip)
{
      /* Reset irq CHK */
      if (vx_send_irq_dsp(chip, IRQ_RESET_CHK) < 0)
            return -EIO;
      /* Wait until CHK = 0 */
      if (vx_check_isr(chip, ISR_CHK, 0, 200) < 0)
            return -EIO;
      return 0;
}

/*
 * vx_transfer_end - terminate message transfer
 * @cmd: IRQ message to send (IRQ_MESS_XXX_END)
 *
 * returns 0 if successful, or a negative error code.
 * the error code can be VX-specific, retrieved via vx_get_error().
 * NB: call with spinlock held!
 */
static int vx_transfer_end(struct vx_core *chip, int cmd)
{
      int err;

      if ((err = vx_reset_chk(chip)) < 0)
            return err;

      /* irq MESS_READ/WRITE_END */
      if ((err = vx_send_irq_dsp(chip, cmd)) < 0)
            return err;

      /* Wait CHK = 1 */
      if ((err = vx_wait_isr_bit(chip, ISR_CHK)) < 0)
            return err;

      /* If error, Read RX */
      if ((err = vx_inb(chip, ISR)) & ISR_ERR) {
            if ((err = vx_wait_for_rx_full(chip)) < 0) {
                  snd_printd(KERN_DEBUG "transfer_end: error in rx_full\n");
                  return err;
            }
            err = vx_inb(chip, RXH) << 16;
            err |= vx_inb(chip, RXM) << 8;
            err |= vx_inb(chip, RXL);
            snd_printd(KERN_DEBUG "transfer_end: error = 0x%x\n", err);
            return -(VX_ERR_MASK | err);
      }
      return 0;
}

/*
 * vx_read_status - return the status rmh
 * @rmh: rmh record to store the status
 *
 * returns 0 if successful, or a negative error code.
 * the error code can be VX-specific, retrieved via vx_get_error().
 * NB: call with spinlock held!
 */
static int vx_read_status(struct vx_core *chip, struct vx_rmh *rmh)
{
      int i, err, val, size;

      /* no read necessary? */
      if (rmh->DspStat == RMH_SSIZE_FIXED && rmh->LgStat == 0)
            return 0;

      /* Wait for RX full (with timeout protection)
       * The first word of status is in RX
       */
      err = vx_wait_for_rx_full(chip);
      if (err < 0)
            return err;

      /* Read RX */
      val = vx_inb(chip, RXH) << 16;
      val |= vx_inb(chip, RXM) << 8;
      val |= vx_inb(chip, RXL);

      /* If status given by DSP, let's decode its size */
      switch (rmh->DspStat) {
      case RMH_SSIZE_ARG:
            size = val & 0xff;
            rmh->Stat[0] = val & 0xffff00;
            rmh->LgStat = size + 1;
            break;
      case RMH_SSIZE_MASK:
            /* Let's count the arg numbers from a mask */
            rmh->Stat[0] = val;
            size = 0;
            while (val) {
                  if (val & 0x01)
                        size++;
                  val >>= 1;
            }
            rmh->LgStat = size + 1;
            break;
      default:
            /* else retrieve the status length given by the driver */
            size = rmh->LgStat;
            rmh->Stat[0] = val;  /* Val is the status 1st word */
            size--;              /* hence adjust remaining length */
            break;
        }

      if (size < 1)
            return 0;
      if (snd_BUG_ON(size > SIZE_MAX_STATUS))
            return -EINVAL;

      for (i = 1; i <= size; i++) {
            /* trigger an irq MESS_WRITE_NEXT */
            err = vx_send_irq_dsp(chip, IRQ_MESS_WRITE_NEXT);
            if (err < 0)
                  return err;
            /* Wait for RX full (with timeout protection) */
            err = vx_wait_for_rx_full(chip);
            if (err < 0)
                  return err;
            rmh->Stat[i] = vx_inb(chip, RXH) << 16;
            rmh->Stat[i] |= vx_inb(chip, RXM) <<  8;
            rmh->Stat[i] |= vx_inb(chip, RXL);
      }

      return vx_transfer_end(chip, IRQ_MESS_WRITE_END);
}


#define MASK_MORE_THAN_1_WORD_COMMAND   0x00008000
#define MASK_1_WORD_COMMAND             0x00ff7fff

/*
 * vx_send_msg_nolock - send a DSP message and read back the status
 * @rmh: the rmh record to send and receive
 *
 * returns 0 if successful, or a negative error code.
 * the error code can be VX-specific, retrieved via vx_get_error().
 * 
 * this function doesn't call spinlock at all.
 */
int vx_send_msg_nolock(struct vx_core *chip, struct vx_rmh *rmh)
{
      int i, err;
      
      if (chip->chip_status & VX_STAT_IS_STALE)
            return -EBUSY;

      if ((err = vx_reset_chk(chip)) < 0) {
            snd_printd(KERN_DEBUG "vx_send_msg: vx_reset_chk error\n");
            return err;
      }

#if 0
      printk(KERN_DEBUG "rmh: cmd = 0x%06x, length = %d, stype = %d\n",
             rmh->Cmd[0], rmh->LgCmd, rmh->DspStat);
      if (rmh->LgCmd > 1) {
            printk(KERN_DEBUG "  ");
            for (i = 1; i < rmh->LgCmd; i++)
                  printk("0x%06x ", rmh->Cmd[i]);
            printk("\n");
      }
#endif
      /* Check bit M is set according to length of the command */
      if (rmh->LgCmd > 1)
            rmh->Cmd[0] |= MASK_MORE_THAN_1_WORD_COMMAND;
      else
            rmh->Cmd[0] &= MASK_1_WORD_COMMAND;

      /* Wait for TX empty */
      if ((err = vx_wait_isr_bit(chip, ISR_TX_EMPTY)) < 0) {
            snd_printd(KERN_DEBUG "vx_send_msg: wait tx empty error\n");
            return err;
      }

      /* Write Cmd[0] */
      vx_outb(chip, TXH, (rmh->Cmd[0] >> 16) & 0xff);
      vx_outb(chip, TXM, (rmh->Cmd[0] >> 8) & 0xff);
      vx_outb(chip, TXL, rmh->Cmd[0] & 0xff);

      /* Trigger irq MESSAGE */
      if ((err = vx_send_irq_dsp(chip, IRQ_MESSAGE)) < 0) {
            snd_printd(KERN_DEBUG "vx_send_msg: send IRQ_MESSAGE error\n");
            return err;
      }

      /* Wait for CHK = 1 */
      if ((err = vx_wait_isr_bit(chip, ISR_CHK)) < 0)
            return err;

      /* If error, get error value from RX */
      if (vx_inb(chip, ISR) & ISR_ERR) {
            if ((err = vx_wait_for_rx_full(chip)) < 0) {
                  snd_printd(KERN_DEBUG "vx_send_msg: rx_full read error\n");
                  return err;
            }
            err = vx_inb(chip, RXH) << 16;
            err |= vx_inb(chip, RXM) << 8;
            err |= vx_inb(chip, RXL);
            snd_printd(KERN_DEBUG "msg got error = 0x%x at cmd[0]\n", err);
            err = -(VX_ERR_MASK | err);
            return err;
      }

      /* Send the other words */
      if (rmh->LgCmd > 1) {
            for (i = 1; i < rmh->LgCmd; i++) {
                  /* Wait for TX ready */
                  if ((err = vx_wait_isr_bit(chip, ISR_TX_READY)) < 0) {
                        snd_printd(KERN_DEBUG "vx_send_msg: tx_ready error\n");
                        return err;
                  }

                  /* Write Cmd[i] */
                  vx_outb(chip, TXH, (rmh->Cmd[i] >> 16) & 0xff);
                  vx_outb(chip, TXM, (rmh->Cmd[i] >> 8) & 0xff);
                  vx_outb(chip, TXL, rmh->Cmd[i] & 0xff);

                  /* Trigger irq MESS_READ_NEXT */
                  if ((err = vx_send_irq_dsp(chip, IRQ_MESS_READ_NEXT)) < 0) {
                        snd_printd(KERN_DEBUG "vx_send_msg: IRQ_READ_NEXT error\n");
                        return err;
                  }
            }
            /* Wait for TX empty */
            if ((err = vx_wait_isr_bit(chip, ISR_TX_READY)) < 0) {
                  snd_printd(KERN_DEBUG "vx_send_msg: TX_READY error\n");
                  return err;
            }
            /* End of transfer */
            err = vx_transfer_end(chip, IRQ_MESS_READ_END);
            if (err < 0)
                  return err;
      }

      return vx_read_status(chip, rmh);
}


/*
 * vx_send_msg - send a DSP message with spinlock
 * @rmh: the rmh record to send and receive
 *
 * returns 0 if successful, or a negative error code.
 * see vx_send_msg_nolock().
 */
int vx_send_msg(struct vx_core *chip, struct vx_rmh *rmh)
{
      unsigned long flags;
      int err;

      spin_lock_irqsave(&chip->lock, flags);
      err = vx_send_msg_nolock(chip, rmh);
      spin_unlock_irqrestore(&chip->lock, flags);
      return err;
}


/*
 * vx_send_rih_nolock - send an RIH to xilinx
 * @cmd: the command to send
 *
 * returns 0 if successful, or a negative error code.
 * the error code can be VX-specific, retrieved via vx_get_error().
 *
 * this function doesn't call spinlock at all.
 *
 * unlike RMH, no command is sent to DSP.
 */
int vx_send_rih_nolock(struct vx_core *chip, int cmd)
{
      int err;

      if (chip->chip_status & VX_STAT_IS_STALE)
            return -EBUSY;

#if 0
      printk(KERN_DEBUG "send_rih: cmd = 0x%x\n", cmd);
#endif
      if ((err = vx_reset_chk(chip)) < 0)
            return err;
      /* send the IRQ */
      if ((err = vx_send_irq_dsp(chip, cmd)) < 0)
            return err;
      /* Wait CHK = 1 */
      if ((err = vx_wait_isr_bit(chip, ISR_CHK)) < 0)
            return err;
      /* If error, read RX */
      if (vx_inb(chip, ISR) & ISR_ERR) {
            if ((err = vx_wait_for_rx_full(chip)) < 0)
                  return err;
            err = vx_inb(chip, RXH) << 16;
            err |= vx_inb(chip, RXM) << 8;
            err |= vx_inb(chip, RXL);
            return -(VX_ERR_MASK | err);
      }
      return 0;
}


/*
 * vx_send_rih - send an RIH with spinlock
 * @cmd: the command to send
 *
 * see vx_send_rih_nolock().
 */
int vx_send_rih(struct vx_core *chip, int cmd)
{
      unsigned long flags;
      int err;

      spin_lock_irqsave(&chip->lock, flags);
      err = vx_send_rih_nolock(chip, cmd);
      spin_unlock_irqrestore(&chip->lock, flags);
      return err;
}

#define END_OF_RESET_WAIT_TIME            500   /* us */

/**
 * snd_vx_boot_xilinx - boot up the xilinx interface
 * @boot: the boot record to load
 */
int snd_vx_load_boot_image(struct vx_core *chip, const struct firmware *boot)
{
      unsigned int i;
      int no_fillup = vx_has_new_dsp(chip);

      /* check the length of boot image */
      if (boot->size <= 0)
            return -EINVAL;
      if (boot->size % 3)
            return -EINVAL;
#if 0
      {
            /* more strict check */
            unsigned int c = ((u32)boot->data[0] << 16) | ((u32)boot->data[1] << 8) | boot->data[2];
            if (boot->size != (c + 2) * 3)
                  return -EINVAL;
      }
#endif

      /* reset dsp */
      vx_reset_dsp(chip);
      
      udelay(END_OF_RESET_WAIT_TIME); /* another wait? */

      /* download boot strap */
      for (i = 0; i < 0x600; i += 3) {
            if (i >= boot->size) {
                  if (no_fillup)
                        break;
                  if (vx_wait_isr_bit(chip, ISR_TX_EMPTY) < 0) {
                        snd_printk(KERN_ERR "dsp boot failed at %d\n", i);
                        return -EIO;
                  }
                  vx_outb(chip, TXH, 0);
                  vx_outb(chip, TXM, 0);
                  vx_outb(chip, TXL, 0);
            } else {
                  const unsigned char *image = boot->data + i;
                  if (vx_wait_isr_bit(chip, ISR_TX_EMPTY) < 0) {
                        snd_printk(KERN_ERR "dsp boot failed at %d\n", i);
                        return -EIO;
                  }
                  vx_outb(chip, TXH, image[0]);
                  vx_outb(chip, TXM, image[1]);
                  vx_outb(chip, TXL, image[2]);
            }
      }
      return 0;
}

EXPORT_SYMBOL(snd_vx_load_boot_image);

/*
 * vx_test_irq_src - query the source of interrupts
 *
 * called from irq handler only
 */
static int vx_test_irq_src(struct vx_core *chip, unsigned int *ret)
{
      int err;

      vx_init_rmh(&chip->irq_rmh, CMD_TEST_IT);
      spin_lock(&chip->lock);
      err = vx_send_msg_nolock(chip, &chip->irq_rmh);
      if (err < 0)
            *ret = 0;
      else
            *ret = chip->irq_rmh.Stat[0];
      spin_unlock(&chip->lock);
      return err;
}


/*
 * vx_interrupt - soft irq handler
 */
static void vx_interrupt(unsigned long private_data)
{
      struct vx_core *chip = (struct vx_core *) private_data;
      unsigned int events;
            
      if (chip->chip_status & VX_STAT_IS_STALE)
            return;

      if (vx_test_irq_src(chip, &events) < 0)
            return;
    
#if 0
      if (events & 0x000800)
            printk(KERN_ERR "DSP Stream underrun ! IRQ events = 0x%x\n", events);
#endif
      // printk(KERN_DEBUG "IRQ events = 0x%x\n", events);

      /* We must prevent any application using this DSP
       * and block any further request until the application
       * either unregisters or reloads the DSP
       */
      if (events & FATAL_DSP_ERROR) {
            snd_printk(KERN_ERR "vx_core: fatal DSP error!!\n");
            return;
      }

      /* The start on time code conditions are filled (ie the time code
       * received by the board is equal to one of those given to it).
       */
      if (events & TIME_CODE_EVENT_PENDING)
            ; /* so far, nothing to do yet */

      /* The frequency has changed on the board (UER mode). */
      if (events & FREQUENCY_CHANGE_EVENT_PENDING)
            vx_change_frequency(chip);

      /* update the pcm streams */
      vx_pcm_update_intr(chip, events);
}


/**
 * snd_vx_irq_handler - interrupt handler
 */
irqreturn_t snd_vx_irq_handler(int irq, void *dev)
{
      struct vx_core *chip = dev;

      if (! (chip->chip_status & VX_STAT_CHIP_INIT) ||
          (chip->chip_status & VX_STAT_IS_STALE))
            return IRQ_NONE;
      if (! vx_test_and_ack(chip))
            tasklet_hi_schedule(&chip->tq);
      return IRQ_HANDLED;
}

EXPORT_SYMBOL(snd_vx_irq_handler);

/*
 */
static void vx_reset_board(struct vx_core *chip, int cold_reset)
{
      if (snd_BUG_ON(!chip->ops->reset_board))
            return;

      /* current source, later sync'ed with target */
      chip->audio_source = VX_AUDIO_SRC_LINE;
      if (cold_reset) {
            chip->audio_source_target = chip->audio_source;
            chip->clock_source = INTERNAL_QUARTZ;
            chip->clock_mode = VX_CLOCK_MODE_AUTO;
            chip->freq = 48000;
            chip->uer_detected = VX_UER_MODE_NOT_PRESENT;
            chip->uer_bits = SNDRV_PCM_DEFAULT_CON_SPDIF;
      }

      chip->ops->reset_board(chip, cold_reset);

      vx_reset_codec(chip, cold_reset);

      vx_set_internal_clock(chip, chip->freq);

      /* Reset the DSP */
      vx_reset_dsp(chip);

      if (vx_is_pcmcia(chip)) {
            /* Acknowledge any pending IRQ and reset the MEMIRQ flag. */
            vx_test_and_ack(chip);
            vx_validate_irq(chip, 1);
      }

      /* init CBits */
      vx_set_iec958_status(chip, chip->uer_bits);
}


/*
 * proc interface
 */

static void vx_proc_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
{
      struct vx_core *chip = entry->private_data;
      static char *audio_src_vxp[] = { "Line", "Mic", "Digital" };
      static char *audio_src_vx2[] = { "Analog", "Analog", "Digital" };
      static char *clock_mode[] = { "Auto", "Internal", "External" };
      static char *clock_src[] = { "Internal", "External" };
      static char *uer_type[] = { "Consumer", "Professional", "Not Present" };
      
      snd_iprintf(buffer, "%s\n", chip->card->longname);
      snd_iprintf(buffer, "Xilinx Firmware: %s\n",
                chip->chip_status & VX_STAT_XILINX_LOADED ? "Loaded" : "No");
      snd_iprintf(buffer, "Device Initialized: %s\n",
                chip->chip_status & VX_STAT_DEVICE_INIT ? "Yes" : "No");
      snd_iprintf(buffer, "DSP audio info:");
      if (chip->audio_info & VX_AUDIO_INFO_REAL_TIME)
            snd_iprintf(buffer, " realtime");
      if (chip->audio_info & VX_AUDIO_INFO_OFFLINE)
            snd_iprintf(buffer, " offline");
      if (chip->audio_info & VX_AUDIO_INFO_MPEG1)
            snd_iprintf(buffer, " mpeg1");
      if (chip->audio_info & VX_AUDIO_INFO_MPEG2)
            snd_iprintf(buffer, " mpeg2");
      if (chip->audio_info & VX_AUDIO_INFO_LINEAR_8)
            snd_iprintf(buffer, " linear8");
      if (chip->audio_info & VX_AUDIO_INFO_LINEAR_16)
            snd_iprintf(buffer, " linear16");
      if (chip->audio_info & VX_AUDIO_INFO_LINEAR_24)
            snd_iprintf(buffer, " linear24");
      snd_iprintf(buffer, "\n");
      snd_iprintf(buffer, "Input Source: %s\n", vx_is_pcmcia(chip) ?
                audio_src_vxp[chip->audio_source] :
                audio_src_vx2[chip->audio_source]);
      snd_iprintf(buffer, "Clock Mode: %s\n", clock_mode[chip->clock_mode]);
      snd_iprintf(buffer, "Clock Source: %s\n", clock_src[chip->clock_source]);
      snd_iprintf(buffer, "Frequency: %d\n", chip->freq);
      snd_iprintf(buffer, "Detected Frequency: %d\n", chip->freq_detected);
      snd_iprintf(buffer, "Detected UER type: %s\n", uer_type[chip->uer_detected]);
      snd_iprintf(buffer, "Min/Max/Cur IBL: %d/%d/%d (granularity=%d)\n",
                chip->ibl.min_size, chip->ibl.max_size, chip->ibl.size,
                chip->ibl.granularity);
}

static void vx_proc_init(struct vx_core *chip)
{
      struct snd_info_entry *entry;

      if (! snd_card_proc_new(chip->card, "vx-status", &entry))
            snd_info_set_text_ops(entry, chip, vx_proc_read);
}


/**
 * snd_vx_dsp_boot - load the DSP boot
 */
int snd_vx_dsp_boot(struct vx_core *chip, const struct firmware *boot)
{
      int err;
      int cold_reset = !(chip->chip_status & VX_STAT_DEVICE_INIT);

      vx_reset_board(chip, cold_reset);
      vx_validate_irq(chip, 0);

      if ((err = snd_vx_load_boot_image(chip, boot)) < 0)
            return err;
      msleep(10);

      return 0;
}

EXPORT_SYMBOL(snd_vx_dsp_boot);

/**
 * snd_vx_dsp_load - load the DSP image
 */
int snd_vx_dsp_load(struct vx_core *chip, const struct firmware *dsp)
{
      unsigned int i;
      int err;
      unsigned int csum = 0;
      const unsigned char *image, *cptr;

      if (dsp->size % 3)
            return -EINVAL;

      vx_toggle_dac_mute(chip, 1);

      /* Transfert data buffer from PC to DSP */
      for (i = 0; i < dsp->size; i += 3) {
            image = dsp->data + i;
            /* Wait DSP ready for a new read */
            if ((err = vx_wait_isr_bit(chip, ISR_TX_EMPTY)) < 0) {
                  printk("dsp loading error at position %d\n", i);
                  return err;
            }
            cptr = image;
            csum ^= *cptr;
            csum = (csum >> 24) | (csum << 8);
            vx_outb(chip, TXH, *cptr++);
            csum ^= *cptr;
            csum = (csum >> 24) | (csum << 8);
            vx_outb(chip, TXM, *cptr++);
            csum ^= *cptr;
            csum = (csum >> 24) | (csum << 8);
            vx_outb(chip, TXL, *cptr++);
      }
      snd_printdd(KERN_DEBUG "checksum = 0x%08x\n", csum);

      msleep(200);

      if ((err = vx_wait_isr_bit(chip, ISR_CHK)) < 0)
            return err;

      vx_toggle_dac_mute(chip, 0);

      vx_test_and_ack(chip);
      vx_validate_irq(chip, 1);

      return 0;
}

EXPORT_SYMBOL(snd_vx_dsp_load);

#ifdef CONFIG_PM
/*
 * suspend
 */
int snd_vx_suspend(struct vx_core *chip, pm_message_t state)
{
      unsigned int i;

      snd_power_change_state(chip->card, SNDRV_CTL_POWER_D3hot);
      chip->chip_status |= VX_STAT_IN_SUSPEND;
      for (i = 0; i < chip->hw->num_codecs; i++)
            snd_pcm_suspend_all(chip->pcm[i]);

      return 0;
}

EXPORT_SYMBOL(snd_vx_suspend);

/*
 * resume
 */
int snd_vx_resume(struct vx_core *chip)
{
      int i, err;

      chip->chip_status &= ~VX_STAT_CHIP_INIT;

      for (i = 0; i < 4; i++) {
            if (! chip->firmware[i])
                  continue;
            err = chip->ops->load_dsp(chip, i, chip->firmware[i]);
            if (err < 0) {
                  snd_printk(KERN_ERR "vx: firmware resume error at DSP %d\n", i);
                  return -EIO;
            }
      }

      chip->chip_status |= VX_STAT_CHIP_INIT;
      chip->chip_status &= ~VX_STAT_IN_SUSPEND;

      snd_power_change_state(chip->card, SNDRV_CTL_POWER_D0);
      return 0;
}

EXPORT_SYMBOL(snd_vx_resume);
#endif

/**
 * snd_vx_create - constructor for struct vx_core
 * @hw: hardware specific record
 *
 * this function allocates the instance and prepare for the hardware
 * initialization.
 *
 * return the instance pointer if successful, NULL in error.
 */
struct vx_core *snd_vx_create(struct snd_card *card, struct snd_vx_hardware *hw,
                        struct snd_vx_ops *ops,
                        int extra_size)
{
      struct vx_core *chip;

      if (snd_BUG_ON(!card || !hw || !ops))
            return NULL;

      chip = kzalloc(sizeof(*chip) + extra_size, GFP_KERNEL);
      if (! chip) {
            snd_printk(KERN_ERR "vx_core: no memory\n");
            return NULL;
      }
      spin_lock_init(&chip->lock);
      spin_lock_init(&chip->irq_lock);
      chip->irq = -1;
      chip->hw = hw;
      chip->type = hw->type;
      chip->ops = ops;
      tasklet_init(&chip->tq, vx_interrupt, (unsigned long)chip);
      mutex_init(&chip->mixer_mutex);

      chip->card = card;
      card->private_data = chip;
      strcpy(card->driver, hw->name);
      sprintf(card->shortname, "Digigram %s", hw->name);

      vx_proc_init(chip);

      return chip;
}

EXPORT_SYMBOL(snd_vx_create);

/*
 * module entries
 */
static int __init alsa_vx_core_init(void)
{
      return 0;
}

static void __exit alsa_vx_core_exit(void)
{
}

module_init(alsa_vx_core_init)
module_exit(alsa_vx_core_exit)

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