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ad1816a_lib.c

/*
    ad1816a.c - lowlevel code for Analog Devices AD1816A chip.
    Copyright (C) 1999-2000 by Massimo Piccioni <dafastidio@libero.it>

    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 <sound/driver.h>
#include <linux/delay.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <sound/core.h>
#include <sound/tlv.h>
#include <sound/ad1816a.h>

#include <asm/io.h>
#include <asm/dma.h>

static inline int snd_ad1816a_busy_wait(struct snd_ad1816a *chip)
{
      int timeout;

      for (timeout = 1000; timeout-- > 0; udelay(10))
            if (inb(AD1816A_REG(AD1816A_CHIP_STATUS)) & AD1816A_READY)
                  return 0;

      snd_printk("chip busy.\n");
      return -EBUSY;
}

static inline unsigned char snd_ad1816a_in(struct snd_ad1816a *chip, unsigned char reg)
{
      snd_ad1816a_busy_wait(chip);
      return inb(AD1816A_REG(reg));
}

static inline void snd_ad1816a_out(struct snd_ad1816a *chip, unsigned char reg,
                      unsigned char value)
{
      snd_ad1816a_busy_wait(chip);
      outb(value, AD1816A_REG(reg));
}

static inline void snd_ad1816a_out_mask(struct snd_ad1816a *chip, unsigned char reg,
                         unsigned char mask, unsigned char value)
{
      snd_ad1816a_out(chip, reg,
            (value & mask) | (snd_ad1816a_in(chip, reg) & ~mask));
}

static unsigned short snd_ad1816a_read(struct snd_ad1816a *chip, unsigned char reg)
{
      snd_ad1816a_out(chip, AD1816A_INDIR_ADDR, reg & 0x3f);
      return snd_ad1816a_in(chip, AD1816A_INDIR_DATA_LOW) |
            (snd_ad1816a_in(chip, AD1816A_INDIR_DATA_HIGH) << 8);
}

static void snd_ad1816a_write(struct snd_ad1816a *chip, unsigned char reg,
                        unsigned short value)
{
      snd_ad1816a_out(chip, AD1816A_INDIR_ADDR, reg & 0x3f);
      snd_ad1816a_out(chip, AD1816A_INDIR_DATA_LOW, value & 0xff);
      snd_ad1816a_out(chip, AD1816A_INDIR_DATA_HIGH, (value >> 8) & 0xff);
}

static void snd_ad1816a_write_mask(struct snd_ad1816a *chip, unsigned char reg,
                           unsigned short mask, unsigned short value)
{
      snd_ad1816a_write(chip, reg,
            (value & mask) | (snd_ad1816a_read(chip, reg) & ~mask));
}


static unsigned char snd_ad1816a_get_format(struct snd_ad1816a *chip,
                                  unsigned int format, int channels)
{
      unsigned char retval = AD1816A_FMT_LINEAR_8;

      switch (format) {
      case SNDRV_PCM_FORMAT_MU_LAW:
            retval = AD1816A_FMT_ULAW_8;
            break;
      case SNDRV_PCM_FORMAT_A_LAW:
            retval = AD1816A_FMT_ALAW_8;
            break;
      case SNDRV_PCM_FORMAT_S16_LE:
            retval = AD1816A_FMT_LINEAR_16_LIT;
            break;
      case SNDRV_PCM_FORMAT_S16_BE:
            retval = AD1816A_FMT_LINEAR_16_BIG;
      }
      return (channels > 1) ? (retval | AD1816A_FMT_STEREO) : retval;
}

static int snd_ad1816a_open(struct snd_ad1816a *chip, unsigned int mode)
{
      unsigned long flags;

      spin_lock_irqsave(&chip->lock, flags);

      if (chip->mode & mode) {
            spin_unlock_irqrestore(&chip->lock, flags);
            return -EAGAIN;
      }

      switch ((mode &= AD1816A_MODE_OPEN)) {
      case AD1816A_MODE_PLAYBACK:
            snd_ad1816a_out_mask(chip, AD1816A_INTERRUPT_STATUS,
                  AD1816A_PLAYBACK_IRQ_PENDING, 0x00);
            snd_ad1816a_write_mask(chip, AD1816A_INTERRUPT_ENABLE,
                  AD1816A_PLAYBACK_IRQ_ENABLE, 0xffff);
            break;
      case AD1816A_MODE_CAPTURE:
            snd_ad1816a_out_mask(chip, AD1816A_INTERRUPT_STATUS,
                  AD1816A_CAPTURE_IRQ_PENDING, 0x00);
            snd_ad1816a_write_mask(chip, AD1816A_INTERRUPT_ENABLE,
                  AD1816A_CAPTURE_IRQ_ENABLE, 0xffff);
            break;
      case AD1816A_MODE_TIMER:
            snd_ad1816a_out_mask(chip, AD1816A_INTERRUPT_STATUS,
                  AD1816A_TIMER_IRQ_PENDING, 0x00);
            snd_ad1816a_write_mask(chip, AD1816A_INTERRUPT_ENABLE,
                  AD1816A_TIMER_IRQ_ENABLE, 0xffff);
      }
      chip->mode |= mode;

      spin_unlock_irqrestore(&chip->lock, flags);
      return 0;
}

static void snd_ad1816a_close(struct snd_ad1816a *chip, unsigned int mode)
{
      unsigned long flags;

      spin_lock_irqsave(&chip->lock, flags);

      switch ((mode &= AD1816A_MODE_OPEN)) {
      case AD1816A_MODE_PLAYBACK:
            snd_ad1816a_out_mask(chip, AD1816A_INTERRUPT_STATUS,
                  AD1816A_PLAYBACK_IRQ_PENDING, 0x00);
            snd_ad1816a_write_mask(chip, AD1816A_INTERRUPT_ENABLE,
                  AD1816A_PLAYBACK_IRQ_ENABLE, 0x0000);
            break;
      case AD1816A_MODE_CAPTURE:
            snd_ad1816a_out_mask(chip, AD1816A_INTERRUPT_STATUS,
                  AD1816A_CAPTURE_IRQ_PENDING, 0x00);
            snd_ad1816a_write_mask(chip, AD1816A_INTERRUPT_ENABLE,
                  AD1816A_CAPTURE_IRQ_ENABLE, 0x0000);
            break;
      case AD1816A_MODE_TIMER:
            snd_ad1816a_out_mask(chip, AD1816A_INTERRUPT_STATUS,
                  AD1816A_TIMER_IRQ_PENDING, 0x00);
            snd_ad1816a_write_mask(chip, AD1816A_INTERRUPT_ENABLE,
                  AD1816A_TIMER_IRQ_ENABLE, 0x0000);
      }
      if (!((chip->mode &= ~mode) & AD1816A_MODE_OPEN))
            chip->mode = 0;

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


static int snd_ad1816a_trigger(struct snd_ad1816a *chip, unsigned char what,
                         int channel, int cmd, int iscapture)
{
      int error = 0;

      switch (cmd) {
      case SNDRV_PCM_TRIGGER_START:
      case SNDRV_PCM_TRIGGER_STOP:
            spin_lock(&chip->lock);
            cmd = (cmd == SNDRV_PCM_TRIGGER_START) ? 0xff: 0x00;
            /* if (what & AD1816A_PLAYBACK_ENABLE) */
            /* That is not valid, because playback and capture enable
             * are the same bit pattern, just to different addresses
             */
            if (! iscapture)
                  snd_ad1816a_out_mask(chip, AD1816A_PLAYBACK_CONFIG,
                        AD1816A_PLAYBACK_ENABLE, cmd);
            else
                  snd_ad1816a_out_mask(chip, AD1816A_CAPTURE_CONFIG,
                        AD1816A_CAPTURE_ENABLE, cmd);
            spin_unlock(&chip->lock);
            break;
      default:
            snd_printk("invalid trigger mode 0x%x.\n", what);
            error = -EINVAL;
      }

      return error;
}

static int snd_ad1816a_playback_trigger(struct snd_pcm_substream *substream, int cmd)
{
      struct snd_ad1816a *chip = snd_pcm_substream_chip(substream);
      return snd_ad1816a_trigger(chip, AD1816A_PLAYBACK_ENABLE,
                           SNDRV_PCM_STREAM_PLAYBACK, cmd, 0);
}

static int snd_ad1816a_capture_trigger(struct snd_pcm_substream *substream, int cmd)
{
      struct snd_ad1816a *chip = snd_pcm_substream_chip(substream);
      return snd_ad1816a_trigger(chip, AD1816A_CAPTURE_ENABLE,
                           SNDRV_PCM_STREAM_CAPTURE, cmd, 1);
}

static int snd_ad1816a_hw_params(struct snd_pcm_substream *substream,
                         struct snd_pcm_hw_params *hw_params)
{
      return snd_pcm_lib_malloc_pages(substream, params_buffer_bytes(hw_params));
}

static int snd_ad1816a_hw_free(struct snd_pcm_substream *substream)
{
      return snd_pcm_lib_free_pages(substream);
}

static int snd_ad1816a_playback_prepare(struct snd_pcm_substream *substream)
{
      struct snd_ad1816a *chip = snd_pcm_substream_chip(substream);
      unsigned long flags;
      struct snd_pcm_runtime *runtime = substream->runtime;
      unsigned int size, rate;

      spin_lock_irqsave(&chip->lock, flags);

      chip->p_dma_size = size = snd_pcm_lib_buffer_bytes(substream);
      snd_ad1816a_out_mask(chip, AD1816A_PLAYBACK_CONFIG,
            AD1816A_PLAYBACK_ENABLE | AD1816A_PLAYBACK_PIO, 0x00);

      snd_dma_program(chip->dma1, runtime->dma_addr, size,
                  DMA_MODE_WRITE | DMA_AUTOINIT);

      rate = runtime->rate;
      if (chip->clock_freq)
            rate = (rate * 33000) / chip->clock_freq;
      snd_ad1816a_write(chip, AD1816A_PLAYBACK_SAMPLE_RATE, rate);
      snd_ad1816a_out_mask(chip, AD1816A_PLAYBACK_CONFIG,
            AD1816A_FMT_ALL | AD1816A_FMT_STEREO,
            snd_ad1816a_get_format(chip, runtime->format,
                  runtime->channels));

      snd_ad1816a_write(chip, AD1816A_PLAYBACK_BASE_COUNT,
            snd_pcm_lib_period_bytes(substream) / 4 - 1);

      spin_unlock_irqrestore(&chip->lock, flags);
      return 0;
}

static int snd_ad1816a_capture_prepare(struct snd_pcm_substream *substream)
{
      struct snd_ad1816a *chip = snd_pcm_substream_chip(substream);
      unsigned long flags;
      struct snd_pcm_runtime *runtime = substream->runtime;
      unsigned int size, rate;

      spin_lock_irqsave(&chip->lock, flags);

      chip->c_dma_size = size = snd_pcm_lib_buffer_bytes(substream);
      snd_ad1816a_out_mask(chip, AD1816A_CAPTURE_CONFIG,
            AD1816A_CAPTURE_ENABLE | AD1816A_CAPTURE_PIO, 0x00);

      snd_dma_program(chip->dma2, runtime->dma_addr, size,
                  DMA_MODE_READ | DMA_AUTOINIT);

      rate = runtime->rate;
      if (chip->clock_freq)
            rate = (rate * 33000) / chip->clock_freq;
      snd_ad1816a_write(chip, AD1816A_CAPTURE_SAMPLE_RATE, rate);
      snd_ad1816a_out_mask(chip, AD1816A_CAPTURE_CONFIG,
            AD1816A_FMT_ALL | AD1816A_FMT_STEREO,
            snd_ad1816a_get_format(chip, runtime->format,
                  runtime->channels));

      snd_ad1816a_write(chip, AD1816A_CAPTURE_BASE_COUNT,
            snd_pcm_lib_period_bytes(substream) / 4 - 1);

      spin_unlock_irqrestore(&chip->lock, flags);
      return 0;
}


static snd_pcm_uframes_t snd_ad1816a_playback_pointer(struct snd_pcm_substream *substream)
{
      struct snd_ad1816a *chip = snd_pcm_substream_chip(substream);
      size_t ptr;
      if (!(chip->mode & AD1816A_MODE_PLAYBACK))
            return 0;
      ptr = snd_dma_pointer(chip->dma1, chip->p_dma_size);
      return bytes_to_frames(substream->runtime, ptr);
}

static snd_pcm_uframes_t snd_ad1816a_capture_pointer(struct snd_pcm_substream *substream)
{
      struct snd_ad1816a *chip = snd_pcm_substream_chip(substream);
      size_t ptr;
      if (!(chip->mode & AD1816A_MODE_CAPTURE))
            return 0;
      ptr = snd_dma_pointer(chip->dma2, chip->c_dma_size);
      return bytes_to_frames(substream->runtime, ptr);
}


static irqreturn_t snd_ad1816a_interrupt(int irq, void *dev_id, struct pt_regs *regs)
{
      struct snd_ad1816a *chip = dev_id;
      unsigned char status;

      spin_lock(&chip->lock);
      status = snd_ad1816a_in(chip, AD1816A_INTERRUPT_STATUS);
      spin_unlock(&chip->lock);

      if ((status & AD1816A_PLAYBACK_IRQ_PENDING) && chip->playback_substream)
            snd_pcm_period_elapsed(chip->playback_substream);

      if ((status & AD1816A_CAPTURE_IRQ_PENDING) && chip->capture_substream)
            snd_pcm_period_elapsed(chip->capture_substream);

      if ((status & AD1816A_TIMER_IRQ_PENDING) && chip->timer)
            snd_timer_interrupt(chip->timer, chip->timer->sticks);

      spin_lock(&chip->lock);
      snd_ad1816a_out(chip, AD1816A_INTERRUPT_STATUS, 0x00);
      spin_unlock(&chip->lock);
      return IRQ_HANDLED;
}


static struct snd_pcm_hardware snd_ad1816a_playback = {
      .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
                         SNDRV_PCM_INFO_MMAP_VALID),
      .formats =        (SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW |
                         SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE |
                         SNDRV_PCM_FMTBIT_S16_BE),
      .rates =          SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
      .rate_min =       4000,
      .rate_max =       55200,
      .channels_min =         1,
      .channels_max =         2,
      .buffer_bytes_max =     (128*1024),
      .period_bytes_min =     64,
      .period_bytes_max =     (128*1024),
      .periods_min =          1,
      .periods_max =          1024,
      .fifo_size =            0,
};

static struct snd_pcm_hardware snd_ad1816a_capture = {
      .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
                         SNDRV_PCM_INFO_MMAP_VALID),
      .formats =        (SNDRV_PCM_FMTBIT_MU_LAW | SNDRV_PCM_FMTBIT_A_LAW |
                         SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE |
                         SNDRV_PCM_FMTBIT_S16_BE),
      .rates =          SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
      .rate_min =       4000,
      .rate_max =       55200,
      .channels_min =         1,
      .channels_max =         2,
      .buffer_bytes_max =     (128*1024),
      .period_bytes_min =     64,
      .period_bytes_max =     (128*1024),
      .periods_min =          1,
      .periods_max =          1024,
      .fifo_size =            0,
};

#if 0 /* not used now */
static int snd_ad1816a_timer_close(struct snd_timer *timer)
{
      struct snd_ad1816a *chip = snd_timer_chip(timer);
      snd_ad1816a_close(chip, AD1816A_MODE_TIMER);
      return 0;
}

static int snd_ad1816a_timer_open(struct snd_timer *timer)
{
      struct snd_ad1816a *chip = snd_timer_chip(timer);
      snd_ad1816a_open(chip, AD1816A_MODE_TIMER);
      return 0;
}

static unsigned long snd_ad1816a_timer_resolution(struct snd_timer *timer)
{
      snd_assert(timer != NULL, return 0);

      return 10000;
}

static int snd_ad1816a_timer_start(struct snd_timer *timer)
{
      unsigned short bits;
      unsigned long flags;
      struct snd_ad1816a *chip = snd_timer_chip(timer);
      spin_lock_irqsave(&chip->lock, flags);
      bits = snd_ad1816a_read(chip, AD1816A_INTERRUPT_ENABLE);

      if (!(bits & AD1816A_TIMER_ENABLE)) {
            snd_ad1816a_write(chip, AD1816A_TIMER_BASE_COUNT,
                  timer->sticks & 0xffff);

            snd_ad1816a_write_mask(chip, AD1816A_INTERRUPT_ENABLE,
                  AD1816A_TIMER_ENABLE, 0xffff);
      }
      spin_unlock_irqrestore(&chip->lock, flags);
      return 0;
}

static int snd_ad1816a_timer_stop(struct snd_timer *timer)
{
      unsigned long flags;
      struct snd_ad1816a *chip = snd_timer_chip(timer);
      spin_lock_irqsave(&chip->lock, flags);

      snd_ad1816a_write_mask(chip, AD1816A_INTERRUPT_ENABLE,
            AD1816A_TIMER_ENABLE, 0x0000);

      spin_unlock_irqrestore(&chip->lock, flags);
      return 0;
}

static struct snd_timer_hardware snd_ad1816a_timer_table = {
      .flags =    SNDRV_TIMER_HW_AUTO,
      .resolution =     10000,
      .ticks =    65535,
      .open =           snd_ad1816a_timer_open,
      .close =    snd_ad1816a_timer_close,
      .c_resolution =   snd_ad1816a_timer_resolution,
      .start =    snd_ad1816a_timer_start,
      .stop =           snd_ad1816a_timer_stop,
};
#endif /* not used now */


static int snd_ad1816a_playback_open(struct snd_pcm_substream *substream)
{
      struct snd_ad1816a *chip = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      int error;

      if ((error = snd_ad1816a_open(chip, AD1816A_MODE_PLAYBACK)) < 0)
            return error;
      snd_pcm_set_sync(substream);
      runtime->hw = snd_ad1816a_playback;
      snd_pcm_limit_isa_dma_size(chip->dma1, &runtime->hw.buffer_bytes_max);
      snd_pcm_limit_isa_dma_size(chip->dma1, &runtime->hw.period_bytes_max);
      chip->playback_substream = substream;
      return 0;
}

static int snd_ad1816a_capture_open(struct snd_pcm_substream *substream)
{
      struct snd_ad1816a *chip = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      int error;

      if ((error = snd_ad1816a_open(chip, AD1816A_MODE_CAPTURE)) < 0)
            return error;
      snd_pcm_set_sync(substream);
      runtime->hw = snd_ad1816a_capture;
      snd_pcm_limit_isa_dma_size(chip->dma2, &runtime->hw.buffer_bytes_max);
      snd_pcm_limit_isa_dma_size(chip->dma2, &runtime->hw.period_bytes_max);
      chip->capture_substream = substream;
      return 0;
}

static int snd_ad1816a_playback_close(struct snd_pcm_substream *substream)
{
      struct snd_ad1816a *chip = snd_pcm_substream_chip(substream);

      chip->playback_substream = NULL;
      snd_ad1816a_close(chip, AD1816A_MODE_PLAYBACK);
      return 0;
}

static int snd_ad1816a_capture_close(struct snd_pcm_substream *substream)
{
      struct snd_ad1816a *chip = snd_pcm_substream_chip(substream);

      chip->capture_substream = NULL;
      snd_ad1816a_close(chip, AD1816A_MODE_CAPTURE);
      return 0;
}


static void __devinit snd_ad1816a_init(struct snd_ad1816a *chip)
{
      unsigned long flags;

      spin_lock_irqsave(&chip->lock, flags);

      snd_ad1816a_out(chip, AD1816A_INTERRUPT_STATUS, 0x00);
      snd_ad1816a_out_mask(chip, AD1816A_PLAYBACK_CONFIG,
            AD1816A_PLAYBACK_ENABLE | AD1816A_PLAYBACK_PIO, 0x00);
      snd_ad1816a_out_mask(chip, AD1816A_CAPTURE_CONFIG,
            AD1816A_CAPTURE_ENABLE | AD1816A_CAPTURE_PIO, 0x00);
      snd_ad1816a_write(chip, AD1816A_INTERRUPT_ENABLE, 0x0000);
      snd_ad1816a_write_mask(chip, AD1816A_CHIP_CONFIG,
            AD1816A_CAPTURE_NOT_EQUAL | AD1816A_WSS_ENABLE, 0xffff);
      snd_ad1816a_write(chip, AD1816A_DSP_CONFIG, 0x0000);
      snd_ad1816a_write(chip, AD1816A_POWERDOWN_CTRL, 0x0000);

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

static int __devinit snd_ad1816a_probe(struct snd_ad1816a *chip)
{
      unsigned long flags;

      spin_lock_irqsave(&chip->lock, flags);

      switch (chip->version = snd_ad1816a_read(chip, AD1816A_VERSION_ID)) {
      case 0:
            chip->hardware = AD1816A_HW_AD1815;
            break;
      case 1:
            chip->hardware = AD1816A_HW_AD18MAX10;
            break;
      case 3:
            chip->hardware = AD1816A_HW_AD1816A;
            break;
      default:
            chip->hardware = AD1816A_HW_AUTO;
      }

      spin_unlock_irqrestore(&chip->lock, flags);
      return 0;
}

static int snd_ad1816a_free(struct snd_ad1816a *chip)
{
      release_and_free_resource(chip->res_port);
      if (chip->irq >= 0)
            free_irq(chip->irq, (void *) chip);
      if (chip->dma1 >= 0) {
            snd_dma_disable(chip->dma1);
            free_dma(chip->dma1);
      }
      if (chip->dma2 >= 0) {
            snd_dma_disable(chip->dma2);
            free_dma(chip->dma2);
      }
      kfree(chip);
      return 0;
}

static int snd_ad1816a_dev_free(struct snd_device *device)
{
      struct snd_ad1816a *chip = device->device_data;
      return snd_ad1816a_free(chip);
}

static const char __devinit *snd_ad1816a_chip_id(struct snd_ad1816a *chip)
{
      switch (chip->hardware) {
      case AD1816A_HW_AD1816A: return "AD1816A";
      case AD1816A_HW_AD1815: return "AD1815";
      case AD1816A_HW_AD18MAX10: return "AD18max10";
      default:
            snd_printk("Unknown chip version %d:%d.\n",
                  chip->version, chip->hardware);
            return "AD1816A - unknown";
      }
}

int __devinit snd_ad1816a_create(struct snd_card *card,
                         unsigned long port, int irq, int dma1, int dma2,
                         struct snd_ad1816a **rchip)
{
        static struct snd_device_ops ops = {
            .dev_free = snd_ad1816a_dev_free,
      };
      int error;
      struct snd_ad1816a *chip;

      *rchip = NULL;

      chip = kzalloc(sizeof(*chip), GFP_KERNEL);
      if (chip == NULL)
            return -ENOMEM;
      chip->irq = -1;
      chip->dma1 = -1;
      chip->dma2 = -1;

      if ((chip->res_port = request_region(port, 16, "AD1816A")) == NULL) {
            snd_printk(KERN_ERR "ad1816a: can't grab port 0x%lx\n", port);
            snd_ad1816a_free(chip);
            return -EBUSY;
      }
      if (request_irq(irq, snd_ad1816a_interrupt, IRQF_DISABLED, "AD1816A", (void *) chip)) {
            snd_printk(KERN_ERR "ad1816a: can't grab IRQ %d\n", irq);
            snd_ad1816a_free(chip);
            return -EBUSY;
      }
      chip->irq = irq;
      if (request_dma(dma1, "AD1816A - 1")) {
            snd_printk(KERN_ERR "ad1816a: can't grab DMA1 %d\n", dma1);
            snd_ad1816a_free(chip);
            return -EBUSY;
      }
      chip->dma1 = dma1;
      if (request_dma(dma2, "AD1816A - 2")) {
            snd_printk(KERN_ERR "ad1816a: can't grab DMA2 %d\n", dma2);
            snd_ad1816a_free(chip);
            return -EBUSY;
      }
      chip->dma2 = dma2;

      chip->card = card;
      chip->port = port;
      spin_lock_init(&chip->lock);

      if ((error = snd_ad1816a_probe(chip))) {
            snd_ad1816a_free(chip);
            return error;
      }

      snd_ad1816a_init(chip);

      /* Register device */
      if ((error = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
            snd_ad1816a_free(chip);
            return error;
      }

      *rchip = chip;
      return 0;
}

static struct snd_pcm_ops snd_ad1816a_playback_ops = {
      .open =           snd_ad1816a_playback_open,
      .close =    snd_ad1816a_playback_close,
      .ioctl =    snd_pcm_lib_ioctl,
      .hw_params =      snd_ad1816a_hw_params,
      .hw_free =  snd_ad1816a_hw_free,
      .prepare =  snd_ad1816a_playback_prepare,
      .trigger =  snd_ad1816a_playback_trigger,
      .pointer =  snd_ad1816a_playback_pointer,
};

static struct snd_pcm_ops snd_ad1816a_capture_ops = {
      .open =           snd_ad1816a_capture_open,
      .close =    snd_ad1816a_capture_close,
      .ioctl =    snd_pcm_lib_ioctl,
      .hw_params =      snd_ad1816a_hw_params,
      .hw_free =  snd_ad1816a_hw_free,
      .prepare =  snd_ad1816a_capture_prepare,
      .trigger =  snd_ad1816a_capture_trigger,
      .pointer =  snd_ad1816a_capture_pointer,
};

int __devinit snd_ad1816a_pcm(struct snd_ad1816a *chip, int device, struct snd_pcm **rpcm)
{
      int error;
      struct snd_pcm *pcm;

      if ((error = snd_pcm_new(chip->card, "AD1816A", device, 1, 1, &pcm)))
            return error;

      snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_ad1816a_playback_ops);
      snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_ad1816a_capture_ops);

      pcm->private_data = chip;
      pcm->info_flags = (chip->dma1 == chip->dma2 ) ? SNDRV_PCM_INFO_JOINT_DUPLEX : 0;

      strcpy(pcm->name, snd_ad1816a_chip_id(chip));
      snd_ad1816a_init(chip);

      snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
                                    snd_dma_isa_data(),
                                    64*1024, chip->dma1 > 3 || chip->dma2 > 3 ? 128*1024 : 64*1024);

      chip->pcm = pcm;
      if (rpcm)
            *rpcm = pcm;
      return 0;
}

#if 0 /* not used now */
int __devinit snd_ad1816a_timer(struct snd_ad1816a *chip, int device, struct snd_timer **rtimer)
{
      struct snd_timer *timer;
      struct snd_timer_id tid;
      int error;

      tid.dev_class = SNDRV_TIMER_CLASS_CARD;
      tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE;
      tid.card = chip->card->number;
      tid.device = device;
      tid.subdevice = 0;
      if ((error = snd_timer_new(chip->card, "AD1816A", &tid, &timer)) < 0)
            return error;
      strcpy(timer->name, snd_ad1816a_chip_id(chip));
      timer->private_data = chip;
      chip->timer = timer;
      timer->hw = snd_ad1816a_timer_table;
      if (rtimer)
            *rtimer = timer;
      return 0;
}
#endif /* not used now */

/*
 *
 */

static int snd_ad1816a_info_mux(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_info *uinfo)
{
      static char *texts[8] = {
            "Line", "Mix", "CD", "Synth", "Video",
            "Mic", "Phone",
      };

      uinfo->type = SNDRV_CTL_ELEM_TYPE_ENUMERATED;
      uinfo->count = 2;
      uinfo->value.enumerated.items = 7;
      if (uinfo->value.enumerated.item > 6)
            uinfo->value.enumerated.item = 6;
      strcpy(uinfo->value.enumerated.name, texts[uinfo->value.enumerated.item]);
      return 0;
}

static int snd_ad1816a_get_mux(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
      struct snd_ad1816a *chip = snd_kcontrol_chip(kcontrol);
      unsigned long flags;
      unsigned short val;
      
      spin_lock_irqsave(&chip->lock, flags);
      val = snd_ad1816a_read(chip, AD1816A_ADC_SOURCE_SEL);
      spin_unlock_irqrestore(&chip->lock, flags);
      ucontrol->value.enumerated.item[0] = (val >> 12) & 7;
      ucontrol->value.enumerated.item[1] = (val >> 4) & 7;
      return 0;
}

static int snd_ad1816a_put_mux(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
      struct snd_ad1816a *chip = snd_kcontrol_chip(kcontrol);
      unsigned long flags;
      unsigned short val;
      int change;
      
      if (ucontrol->value.enumerated.item[0] > 6 ||
          ucontrol->value.enumerated.item[1] > 6)
            return -EINVAL;
      val = (ucontrol->value.enumerated.item[0] << 12) |
            (ucontrol->value.enumerated.item[1] << 4);
      spin_lock_irqsave(&chip->lock, flags);
      change = snd_ad1816a_read(chip, AD1816A_ADC_SOURCE_SEL) != val;
      snd_ad1816a_write(chip, AD1816A_ADC_SOURCE_SEL, val);
      spin_unlock_irqrestore(&chip->lock, flags);
      return change;
}

#define AD1816A_SINGLE_TLV(xname, reg, shift, mask, invert, xtlv) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
  .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
  .name = xname, .info = snd_ad1816a_info_single, \
  .get = snd_ad1816a_get_single, .put = snd_ad1816a_put_single, \
  .private_value = reg | (shift << 8) | (mask << 16) | (invert << 24), \
  .tlv = { .p = (xtlv) } }
#define AD1816A_SINGLE(xname, reg, shift, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .info = snd_ad1816a_info_single, \
  .get = snd_ad1816a_get_single, .put = snd_ad1816a_put_single, \
  .private_value = reg | (shift << 8) | (mask << 16) | (invert << 24) }

static int snd_ad1816a_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_ad1816a_get_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
      struct snd_ad1816a *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] = (snd_ad1816a_read(chip, 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_ad1816a_put_single(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
      struct snd_ad1816a *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 old_val, val;
      
      val = (ucontrol->value.integer.value[0] & mask);
      if (invert)
            val = mask - val;
      val <<= shift;
      spin_lock_irqsave(&chip->lock, flags);
      old_val = snd_ad1816a_read(chip, reg);
      val = (old_val & ~(mask << shift)) | val;
      change = val != old_val;
      snd_ad1816a_write(chip, reg, val);
      spin_unlock_irqrestore(&chip->lock, flags);
      return change;
}

#define AD1816A_DOUBLE_TLV(xname, reg, shift_left, shift_right, mask, invert, xtlv) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, \
  .access = SNDRV_CTL_ELEM_ACCESS_READWRITE | SNDRV_CTL_ELEM_ACCESS_TLV_READ, \
  .name = xname, .info = snd_ad1816a_info_double,           \
  .get = snd_ad1816a_get_double, .put = snd_ad1816a_put_double, \
  .private_value = reg | (shift_left << 8) | (shift_right << 12) | (mask << 16) | (invert << 24), \
  .tlv = { .p = (xtlv) } }

#define AD1816A_DOUBLE(xname, reg, shift_left, shift_right, mask, invert) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, .info = snd_ad1816a_info_double, \
  .get = snd_ad1816a_get_double, .put = snd_ad1816a_put_double, \
  .private_value = reg | (shift_left << 8) | (shift_right << 12) | (mask << 16) | (invert << 24) }

static int snd_ad1816a_info_double(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 = 2;
      uinfo->value.integer.min = 0;
      uinfo->value.integer.max = mask;
      return 0;
}

static int snd_ad1816a_get_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
      struct snd_ad1816a *chip = snd_kcontrol_chip(kcontrol);
      unsigned long flags;
      int reg = kcontrol->private_value & 0xff;
      int shift_left = (kcontrol->private_value >> 8) & 0x0f;
      int shift_right = (kcontrol->private_value >> 12) & 0x0f;
      int mask = (kcontrol->private_value >> 16) & 0xff;
      int invert = (kcontrol->private_value >> 24) & 0xff;
      unsigned short val;
      
      spin_lock_irqsave(&chip->lock, flags);
      val = snd_ad1816a_read(chip, reg);
      ucontrol->value.integer.value[0] = (val >> shift_left) & mask;
      ucontrol->value.integer.value[1] = (val >> 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_ad1816a_put_double(struct snd_kcontrol *kcontrol, struct snd_ctl_elem_value *ucontrol)
{
      struct snd_ad1816a *chip = snd_kcontrol_chip(kcontrol);
      unsigned long flags;
      int reg = kcontrol->private_value & 0xff;
      int shift_left = (kcontrol->private_value >> 8) & 0x0f;
      int shift_right = (kcontrol->private_value >> 12) & 0x0f;
      int mask = (kcontrol->private_value >> 16) & 0xff;
      int invert = (kcontrol->private_value >> 24) & 0xff;
      int change;
      unsigned short old_val, 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);
      old_val = snd_ad1816a_read(chip, reg);
      val1 = (old_val & ~((mask << shift_left) | (mask << shift_right))) | val1 | val2;
      change = val1 != old_val;
      snd_ad1816a_write(chip, reg, val1);
      spin_unlock_irqrestore(&chip->lock, flags);
      return change;
}

static DECLARE_TLV_DB_SCALE(db_scale_4bit, -4500, 300, 0);
static DECLARE_TLV_DB_SCALE(db_scale_5bit, -4650, 150, 0);
static DECLARE_TLV_DB_SCALE(db_scale_6bit, -9450, 150, 0);
static DECLARE_TLV_DB_SCALE(db_scale_5bit_12db_max, -3450, 150, 0);
static DECLARE_TLV_DB_SCALE(db_scale_rec_gain, 0, 150, 0);

static struct snd_kcontrol_new snd_ad1816a_controls[] __devinitdata = {
AD1816A_DOUBLE("Master Playback Switch", AD1816A_MASTER_ATT, 15, 7, 1, 1),
AD1816A_DOUBLE_TLV("Master Playback Volume", AD1816A_MASTER_ATT, 8, 0, 31, 1,
               db_scale_5bit),
AD1816A_DOUBLE("PCM Playback Switch", AD1816A_VOICE_ATT, 15, 7, 1, 1),
AD1816A_DOUBLE_TLV("PCM Playback Volume", AD1816A_VOICE_ATT, 8, 0, 63, 1,
               db_scale_6bit),
AD1816A_DOUBLE("Line Playback Switch", AD1816A_LINE_GAIN_ATT, 15, 7, 1, 1),
AD1816A_DOUBLE_TLV("Line Playback Volume", AD1816A_LINE_GAIN_ATT, 8, 0, 31, 1,
               db_scale_5bit_12db_max),
AD1816A_DOUBLE("CD Playback Switch", AD1816A_CD_GAIN_ATT, 15, 7, 1, 1),
AD1816A_DOUBLE_TLV("CD Playback Volume", AD1816A_CD_GAIN_ATT, 8, 0, 31, 1,
               db_scale_5bit_12db_max),
AD1816A_DOUBLE("Synth Playback Switch", AD1816A_SYNTH_GAIN_ATT, 15, 7, 1, 1),
AD1816A_DOUBLE_TLV("Synth Playback Volume", AD1816A_SYNTH_GAIN_ATT, 8, 0, 31, 1,
               db_scale_5bit_12db_max),
AD1816A_DOUBLE("FM Playback Switch", AD1816A_FM_ATT, 15, 7, 1, 1),
AD1816A_DOUBLE_TLV("FM Playback Volume", AD1816A_FM_ATT, 8, 0, 63, 1,
               db_scale_6bit),
AD1816A_SINGLE("Mic Playback Switch", AD1816A_MIC_GAIN_ATT, 15, 1, 1),
AD1816A_SINGLE_TLV("Mic Playback Volume", AD1816A_MIC_GAIN_ATT, 8, 31, 1,
               db_scale_5bit_12db_max),
AD1816A_SINGLE("Mic Boost", AD1816A_MIC_GAIN_ATT, 14, 1, 0),
AD1816A_DOUBLE("Video Playback Switch", AD1816A_VID_GAIN_ATT, 15, 7, 1, 1),
AD1816A_DOUBLE_TLV("Video Playback Volume", AD1816A_VID_GAIN_ATT, 8, 0, 31, 1,
               db_scale_5bit_12db_max),
AD1816A_SINGLE("Phone Capture Switch", AD1816A_PHONE_IN_GAIN_ATT, 15, 1, 1),
AD1816A_SINGLE_TLV("Phone Capture Volume", AD1816A_PHONE_IN_GAIN_ATT, 0, 15, 1,
               db_scale_4bit),
AD1816A_SINGLE("Phone Playback Switch", AD1816A_PHONE_OUT_ATT, 7, 1, 1),
AD1816A_SINGLE_TLV("Phone Playback Volume", AD1816A_PHONE_OUT_ATT, 0, 31, 1,
               db_scale_5bit),
{
      .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
      .name = "Capture Source",
      .info = snd_ad1816a_info_mux,
      .get = snd_ad1816a_get_mux,
      .put = snd_ad1816a_put_mux,
},
AD1816A_DOUBLE("Capture Switch", AD1816A_ADC_PGA, 15, 7, 1, 1),
AD1816A_DOUBLE_TLV("Capture Volume", AD1816A_ADC_PGA, 8, 0, 15, 0,
               db_scale_rec_gain),
AD1816A_SINGLE("3D Control - Switch", AD1816A_3D_PHAT_CTRL, 15, 1, 1),
AD1816A_SINGLE("3D Control - Level", AD1816A_3D_PHAT_CTRL, 0, 15, 0),
};
                                        
int __devinit snd_ad1816a_mixer(struct snd_ad1816a *chip)
{
      struct snd_card *card;
      unsigned int idx;
      int err;

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

      card = chip->card;

      strcpy(card->mixername, snd_ad1816a_chip_id(chip));

      for (idx = 0; idx < ARRAY_SIZE(snd_ad1816a_controls); idx++) {
            if ((err = snd_ctl_add(card, snd_ctl_new1(&snd_ad1816a_controls[idx], chip))) < 0)
                  return err;
      }
      return 0;
}

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