// SPDX-License-Identifier: GPL-2.0-or-later
/*
 *  Copyright (c) by Jaroslav Kysela <perex@perex.cz>
 *  Routines for control of CS4231(A)/CS4232/InterWave & compatible chips
 *
 *  Bugs:
 *     - sometimes record brokes playback with WSS portion of
 *       Yamaha OPL3-SA3 chip
 *     - CS4231 (GUS MAX) - still trouble with occasional noises
 *   - broken initialization?
 */

#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/slab.h>
#include <linux/ioport.h>
#include <linux/module.h>
#include <linux/io.h>
#include <sound/core.h>
#include <sound/wss.h>
#include <sound/pcm_params.h>
#include <sound/tlv.h>

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

MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>");
MODULE_DESCRIPTION("Routines for control of CS4231(A)/CS4232/InterWave & compatible chips");
MODULE_LICENSE("GPL");

#if 0
#define SNDRV_DEBUG_MCE
#endif

/*
 *  Some variables
 */

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

static const struct snd_pcm_hw_constraint_list hw_constraints_rates = {
 .count = ARRAY_SIZE(rates),
 .list = rates,
 .mask = 0,
};

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

static const unsigned char snd_wss_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 */
 0xfc,   /* 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 */
 0xcf,   /* 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 const unsigned char snd_opti93x_original_image[32] =
{
 0x00,  /* 00/00 - l_mixout_outctrl */
 0x00,  /* 01/01 - r_mixout_outctrl */
 0x88,  /* 02/02 - l_cd_inctrl */
 0x88,  /* 03/03 - r_cd_inctrl */
 0x88,  /* 04/04 - l_a1/fm_inctrl */
 0x88,  /* 05/05 - r_a1/fm_inctrl */
 0x80,  /* 06/06 - l_dac_inctrl */
 0x80,  /* 07/07 - r_dac_inctrl */
 0x00,  /* 08/08 - ply_dataform_reg */
 0x00,  /* 09/09 - if_conf */
 0x00,  /* 0a/10 - pin_ctrl */
 0x00,  /* 0b/11 - err_init_reg */
 0x0a,  /* 0c/12 - id_reg */
 0x00,  /* 0d/13 - reserved */
 0x00,  /* 0e/14 - ply_upcount_reg */
 0x00,  /* 0f/15 - ply_lowcount_reg */
 0x88,  /* 10/16 - reserved/l_a1_inctrl */
 0x88,  /* 11/17 - reserved/r_a1_inctrl */
 0x88,  /* 12/18 - l_line_inctrl */
 0x88,  /* 13/19 - r_line_inctrl */
 0x88,  /* 14/20 - l_mic_inctrl */
 0x88,  /* 15/21 - r_mic_inctrl */
 0x80,  /* 16/22 - l_out_outctrl */
 0x80,  /* 17/23 - r_out_outctrl */
 0x00,  /* 18/24 - reserved */
 0x00,  /* 19/25 - reserved */
 0x00,  /* 1a/26 - reserved */
 0x00,  /* 1b/27 - reserved */
 0x00,  /* 1c/28 - cap_dataform_reg */
 0x00,  /* 1d/29 - reserved */
 0x00,  /* 1e/30 - cap_upcount_reg */
 0x00  /* 1f/31 - cap_lowcount_reg */
};

/*
 *  Basic I/O functions
 */

static inline void wss_outb(struct snd_wss *chip, u8 offset, u8 val)
{
 outb(val, chip->port + offset);
}

static inline u8 wss_inb(struct snd_wss *chip, u8 offset)
{
 return inb(chip->port + offset);
}

static void snd_wss_wait(struct snd_wss *chip)
{
 int timeout;

 for (timeout = 250;
      timeout > 0 && (wss_inb(chip, CS4231P(REGSEL)) & CS4231_INIT);
      timeout--)
  udelay(100);
}

static void snd_wss_dout(struct snd_wss *chip, unsigned char reg,
    unsigned char value)
{
 int timeout;

 for (timeout = 250;
      timeout > 0 && (wss_inb(chip, CS4231P(REGSEL)) & CS4231_INIT);
      timeout--)
  udelay(10);
 wss_outb(chip, CS4231P(REGSEL), chip->mce_bit | reg);
 wss_outb(chip, CS4231P(REG), value);
 mb();
}

void snd_wss_out(struct snd_wss *chip, unsigned char reg, unsigned char value)
{
 snd_wss_wait(chip);
#ifdef CONFIG_SND_DEBUG
 if (wss_inb(chip, CS4231P(REGSEL)) & CS4231_INIT)
  dev_dbg(chip->card->dev,
   "out: auto calibration time out - reg = 0x%x, value = 0x%x\n",
   reg, value);
#endif
 wss_outb(chip, CS4231P(REGSEL), chip->mce_bit | reg);
 wss_outb(chip, CS4231P(REG), value);
 chip->image[reg] = value;
 mb();
 dev_dbg(chip->card->dev, "codec out - reg 0x%x = 0x%x\n",
  chip->mce_bit | reg, value);
}
EXPORT_SYMBOL(snd_wss_out);

unsigned char snd_wss_in(struct snd_wss *chip, unsigned char reg)
{
 snd_wss_wait(chip);
#ifdef CONFIG_SND_DEBUG
 if (wss_inb(chip, CS4231P(REGSEL)) & CS4231_INIT)
  dev_dbg(chip->card->dev,
   "in: auto calibration time out - reg = 0x%x\n", reg);
#endif
 wss_outb(chip, CS4231P(REGSEL), chip->mce_bit | reg);
 mb();
 return wss_inb(chip, CS4231P(REG));
}
EXPORT_SYMBOL(snd_wss_in);

void snd_cs4236_ext_out(struct snd_wss *chip, unsigned char reg,
   unsigned char val)
{
 wss_outb(chip, CS4231P(REGSEL), chip->mce_bit | 0x17);
 wss_outb(chip, CS4231P(REG),
   reg | (chip->image[CS4236_EXT_REG] & 0x01));
 wss_outb(chip, CS4231P(REG), val);
 chip->eimage[CS4236_REG(reg)] = val;
#if 0
 dev_dbg(chip->card->dev, "ext out : reg = 0x%x, val = 0x%x\n", reg, val);
#endif
}
EXPORT_SYMBOL(snd_cs4236_ext_out);

unsigned char snd_cs4236_ext_in(struct snd_wss *chip, unsigned char reg)
{
 wss_outb(chip, CS4231P(REGSEL), chip->mce_bit | 0x17);
 wss_outb(chip, CS4231P(REG),
   reg | (chip->image[CS4236_EXT_REG] & 0x01));
#if 1
 return wss_inb(chip, CS4231P(REG));
#else
 {
  unsigned char res;
  res = wss_inb(chip, CS4231P(REG));
  dev_dbg(chip->card->dev, "ext in : reg = 0x%x, val = 0x%x\n",
   reg, res);
  return res;
 }
#endif
}
EXPORT_SYMBOL(snd_cs4236_ext_in);

#if 0

static void snd_wss_debug(struct snd_wss *chip)
{
 dev_dbg(chip->card->dev,
  "CS4231 REGS:      INDEX = 0x%02x  "
  "                 STATUS = 0x%02x\n",
     wss_inb(chip, CS4231P(REGSEL)),
     wss_inb(chip, CS4231P(STATUS)));
 dev_dbg(chip->card->dev,
  "  0x00: left input      = 0x%02x  "
  "  0x10: alt 1 (CFIG 2)  = 0x%02x\n",
     snd_wss_in(chip, 0x00),
     snd_wss_in(chip, 0x10));
 dev_dbg(chip->card->dev,
  "  0x01: right input     = 0x%02x  "
  "  0x11: alt 2 (CFIG 3)  = 0x%02x\n",
     snd_wss_in(chip, 0x01),
     snd_wss_in(chip, 0x11));
 dev_dbg(chip->card->dev,
  "  0x02: GF1 left input  = 0x%02x  "
  "  0x12: left line in    = 0x%02x\n",
     snd_wss_in(chip, 0x02),
     snd_wss_in(chip, 0x12));
 dev_dbg(chip->card->dev,
  "  0x03: GF1 right input = 0x%02x  "
  "  0x13: right line in   = 0x%02x\n",
     snd_wss_in(chip, 0x03),
     snd_wss_in(chip, 0x13));
 dev_dbg(chip->card->dev,
  "  0x04: CD left input   = 0x%02x  "
  "  0x14: timer low       = 0x%02x\n",
     snd_wss_in(chip, 0x04),
     snd_wss_in(chip, 0x14));
 dev_dbg(chip->card->dev,
  "  0x05: CD right input  = 0x%02x  "
  "  0x15: timer high      = 0x%02x\n",
     snd_wss_in(chip, 0x05),
     snd_wss_in(chip, 0x15));
 dev_dbg(chip->card->dev,
  "  0x06: left output     = 0x%02x  "
  "  0x16: left MIC (PnP)  = 0x%02x\n",
     snd_wss_in(chip, 0x06),
     snd_wss_in(chip, 0x16));
 dev_dbg(chip->card->dev,
  "  0x07: right output    = 0x%02x  "
  "  0x17: right MIC (PnP) = 0x%02x\n",
     snd_wss_in(chip, 0x07),
     snd_wss_in(chip, 0x17));
 dev_dbg(chip->card->dev,
  "  0x08: playback format = 0x%02x  "
  "  0x18: IRQ status      = 0x%02x\n",
     snd_wss_in(chip, 0x08),
     snd_wss_in(chip, 0x18));
 dev_dbg(chip->card->dev,
  "  0x09: iface (CFIG 1)  = 0x%02x  "
  "  0x19: left line out   = 0x%02x\n",
     snd_wss_in(chip, 0x09),
     snd_wss_in(chip, 0x19));
 dev_dbg(chip->card->dev,
  "  0x0a: pin control     = 0x%02x  "
  "  0x1a: mono control    = 0x%02x\n",
     snd_wss_in(chip, 0x0a),
     snd_wss_in(chip, 0x1a));
 dev_dbg(chip->card->dev,
  "  0x0b: init & status   = 0x%02x  "
  "  0x1b: right line out  = 0x%02x\n",
     snd_wss_in(chip, 0x0b),
     snd_wss_in(chip, 0x1b));
 dev_dbg(chip->card->dev,
  "  0x0c: revision & mode = 0x%02x  "
  "  0x1c: record format   = 0x%02x\n",
     snd_wss_in(chip, 0x0c),
     snd_wss_in(chip, 0x1c));
 dev_dbg(chip->card->dev,
  "  0x0d: loopback        = 0x%02x  "
  "  0x1d: var freq (PnP)  = 0x%02x\n",
     snd_wss_in(chip, 0x0d),
     snd_wss_in(chip, 0x1d));
 dev_dbg(chip->card->dev,
  "  0x0e: ply upr count   = 0x%02x  "
  "  0x1e: ply lwr count   = 0x%02x\n",
     snd_wss_in(chip, 0x0e),
     snd_wss_in(chip, 0x1e));
 dev_dbg(chip->card->dev,
  "  0x0f: rec upr count   = 0x%02x  "
  "  0x1f: rec lwr count   = 0x%02x\n",
     snd_wss_in(chip, 0x0f),
     snd_wss_in(chip, 0x1f));
}

#endif

/*
 *  CS4231 detection / MCE routines
 */

static void snd_wss_busy_wait(struct snd_wss *chip)
{
 int timeout;

 /* huh.. looks like this sequence is proper for CS4231A chip (GUS MAX) */
 for (timeout = 5; timeout > 0; timeout--)
  wss_inb(chip, CS4231P(REGSEL));
 /* end of cleanup sequence */
 for (timeout = 25000;
      timeout > 0 && (wss_inb(chip, CS4231P(REGSEL)) & CS4231_INIT);
      timeout--)
  udelay(10);
}

void snd_wss_mce_up(struct snd_wss *chip)
{
 unsigned long flags;
 int timeout;

 snd_wss_wait(chip);
#ifdef CONFIG_SND_DEBUG
 if (wss_inb(chip, CS4231P(REGSEL)) & CS4231_INIT)
  dev_dbg(chip->card->dev,
   "mce_up - auto calibration time out (0)\n");
#endif
 spin_lock_irqsave(&chip->reg_lock, flags);
 chip->mce_bit |= CS4231_MCE;
 timeout = wss_inb(chip, CS4231P(REGSEL));
 if (timeout == 0x80)
  dev_dbg(chip->card->dev,
   "mce_up [0x%lx]: serious init problem - codec still busy\n",
   chip->port);
 if (!(timeout & CS4231_MCE))
  wss_outb(chip, CS4231P(REGSEL),
    chip->mce_bit | (timeout & 0x1f));
 spin_unlock_irqrestore(&chip->reg_lock, flags);
}
EXPORT_SYMBOL(snd_wss_mce_up);

void snd_wss_mce_down(struct snd_wss *chip)
{
 unsigned long flags;
 unsigned long end_time;
 int timeout;
 int hw_mask = WSS_HW_CS4231_MASK | WSS_HW_CS4232_MASK | WSS_HW_AD1848;

 snd_wss_busy_wait(chip);

#ifdef CONFIG_SND_DEBUG
 if (wss_inb(chip, CS4231P(REGSEL)) & CS4231_INIT)
  dev_dbg(chip->card->dev,
   "mce_down [0x%lx] - auto calibration time out (0)\n",
   (long)CS4231P(REGSEL));
#endif
 spin_lock_irqsave(&chip->reg_lock, flags);
 chip->mce_bit &= ~CS4231_MCE;
 timeout = wss_inb(chip, CS4231P(REGSEL));
 wss_outb(chip, CS4231P(REGSEL), chip->mce_bit | (timeout & 0x1f));
 spin_unlock_irqrestore(&chip->reg_lock, flags);
 if (timeout == 0x80)
  dev_dbg(chip->card->dev,
   "mce_down [0x%lx]: serious init problem - codec still busy\n",
   chip->port);
 if ((timeout & CS4231_MCE) == 0 || !(chip->hardware & hw_mask))
  return;

 /*
 * Wait for (possible -- during init auto-calibration may not be set)
 * calibration process to start. Needs up to 5 sample periods on AD1848
 * which at the slowest possible rate of 5.5125 kHz means 907 us.
 */
 msleep(1);

 dev_dbg(chip->card->dev, "(1) jiffies = %lu\n", jiffies);

 /* check condition up to 250 ms */
 end_time = jiffies + msecs_to_jiffies(250);
 while (snd_wss_in(chip, CS4231_TEST_INIT) &
  CS4231_CALIB_IN_PROGRESS) {

  if (time_after(jiffies, end_time)) {
   dev_err(chip->card->dev,
    "mce_down - auto calibration time out (2)\n");
   return;
  }
  msleep(1);
 }

 dev_dbg(chip->card->dev, "(2) jiffies = %lu\n", jiffies);

 /* check condition up to 100 ms */
 end_time = jiffies + msecs_to_jiffies(100);
 while (wss_inb(chip, CS4231P(REGSEL)) & CS4231_INIT) {
  if (time_after(jiffies, end_time)) {
   dev_err(chip->card->dev,
    "mce_down - auto calibration time out (3)\n");
   return;
  }
  msleep(1);
 }

 dev_dbg(chip->card->dev, "(3) jiffies = %lu\n", jiffies);
 dev_dbg(chip->card->dev, "mce_down - exit = 0x%x\n",
  wss_inb(chip, CS4231P(REGSEL)));
}
EXPORT_SYMBOL(snd_wss_mce_down);

static unsigned int snd_wss_get_count(unsigned char format, unsigned int size)
{
 switch (format & 0xe0) {
 case CS4231_LINEAR_16:
 case CS4231_LINEAR_16_BIG:
  size >>= 1;
  break;
 case CS4231_ADPCM_16:
  return size >> 2;
 }
 if (format & CS4231_STEREO)
  size >>= 1;
 return size;
}

static int snd_wss_trigger(struct snd_pcm_substream *substream,
      int cmd)
{
 struct snd_wss *chip = snd_pcm_substream_chip(substream);
 int result = 0;
 unsigned int what;
 struct snd_pcm_substream *s;
 int do_start;

 switch (cmd) {
 case SNDRV_PCM_TRIGGER_START:
 case SNDRV_PCM_TRIGGER_RESUME:
  do_start = 1; break;
 case SNDRV_PCM_TRIGGER_STOP:
 case SNDRV_PCM_TRIGGER_SUSPEND:
  do_start = 0; break;
 default:
  return -EINVAL;
 }

 what = 0;
 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(&chip->reg_lock);
 if (do_start) {
  chip->image[CS4231_IFACE_CTRL] |= what;
  if (chip->trigger)
   chip->trigger(chip, what, 1);
 } else {
  chip->image[CS4231_IFACE_CTRL] &= ~what;
  if (chip->trigger)
   chip->trigger(chip, what, 0);
 }
 snd_wss_out(chip, CS4231_IFACE_CTRL, chip->image[CS4231_IFACE_CTRL]);
 spin_unlock(&chip->reg_lock);
#if 0
 snd_wss_debug(chip);
#endif
 return result;
}

/*
 *  CODEC I/O
 */

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

 for (i = 0; i < ARRAY_SIZE(rates); i++)
  if (rate == rates[i])
   return freq_bits[i];
 // snd_BUG();
 return freq_bits[ARRAY_SIZE(rates) - 1];
}

static unsigned char snd_wss_get_format(struct snd_wss *chip,
     snd_pcm_format_t 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;
#if 0
 dev_dbg(chip->card->dev, "get_format: 0x%x (mode=0x%x)\n", format, mode);
#endif
 return rformat;
}

static void snd_wss_calibrate_mute(struct snd_wss *chip, int mute)
{
 unsigned long flags;

 mute = mute ? 0x80 : 0;
 spin_lock_irqsave(&chip->reg_lock, flags);
 if (chip->calibrate_mute == mute) {
  spin_unlock_irqrestore(&chip->reg_lock, flags);
  return;
 }
 if (!mute) {
  snd_wss_dout(chip, CS4231_LEFT_INPUT,
        chip->image[CS4231_LEFT_INPUT]);
  snd_wss_dout(chip, CS4231_RIGHT_INPUT,
        chip->image[CS4231_RIGHT_INPUT]);
  snd_wss_dout(chip, CS4231_LOOPBACK,
        chip->image[CS4231_LOOPBACK]);
 } else {
  snd_wss_dout(chip, CS4231_LEFT_INPUT,
        0);
  snd_wss_dout(chip, CS4231_RIGHT_INPUT,
        0);
  snd_wss_dout(chip, CS4231_LOOPBACK,
        0xfd);
 }

 snd_wss_dout(chip, CS4231_AUX1_LEFT_INPUT,
       mute | chip->image[CS4231_AUX1_LEFT_INPUT]);
 snd_wss_dout(chip, CS4231_AUX1_RIGHT_INPUT,
       mute | chip->image[CS4231_AUX1_RIGHT_INPUT]);
 snd_wss_dout(chip, CS4231_AUX2_LEFT_INPUT,
       mute | chip->image[CS4231_AUX2_LEFT_INPUT]);
 snd_wss_dout(chip, CS4231_AUX2_RIGHT_INPUT,
       mute | chip->image[CS4231_AUX2_RIGHT_INPUT]);
 snd_wss_dout(chip, CS4231_LEFT_OUTPUT,
       mute | chip->image[CS4231_LEFT_OUTPUT]);
 snd_wss_dout(chip, CS4231_RIGHT_OUTPUT,
       mute | chip->image[CS4231_RIGHT_OUTPUT]);
 if (!(chip->hardware & WSS_HW_AD1848_MASK)) {
  snd_wss_dout(chip, CS4231_LEFT_LINE_IN,
        mute | chip->image[CS4231_LEFT_LINE_IN]);
  snd_wss_dout(chip, CS4231_RIGHT_LINE_IN,
        mute | chip->image[CS4231_RIGHT_LINE_IN]);
  snd_wss_dout(chip, CS4231_MONO_CTRL,
        mute ? 0xc0 : chip->image[CS4231_MONO_CTRL]);
 }
 if (chip->hardware == WSS_HW_INTERWAVE) {
  snd_wss_dout(chip, CS4231_LEFT_MIC_INPUT,
        mute | chip->image[CS4231_LEFT_MIC_INPUT]);
  snd_wss_dout(chip, CS4231_RIGHT_MIC_INPUT,
        mute | chip->image[CS4231_RIGHT_MIC_INPUT]);
  snd_wss_dout(chip, CS4231_LINE_LEFT_OUTPUT,
        mute | chip->image[CS4231_LINE_LEFT_OUTPUT]);
  snd_wss_dout(chip, CS4231_LINE_RIGHT_OUTPUT,
        mute | chip->image[CS4231_LINE_RIGHT_OUTPUT]);
 }
 chip->calibrate_mute = mute;
 spin_unlock_irqrestore(&chip->reg_lock, flags);
}

static void snd_wss_playback_format(struct snd_wss *chip,
           struct snd_pcm_hw_params *params,
           unsigned char pdfr)
{
 unsigned long flags;
 int full_calib = 1;

 mutex_lock(&chip->mce_mutex);
 if (chip->hardware == WSS_HW_CS4231A ||
     (chip->hardware & WSS_HW_CS4232_MASK)) {
  spin_lock_irqsave(&chip->reg_lock, flags);
  if ((chip->image[CS4231_PLAYBK_FORMAT] & 0x0f) == (pdfr & 0x0f)) { /* rate is same? */
   snd_wss_out(chip, CS4231_ALT_FEATURE_1,
        chip->image[CS4231_ALT_FEATURE_1] | 0x10);
   chip->image[CS4231_PLAYBK_FORMAT] = pdfr;
   snd_wss_out(chip, CS4231_PLAYBK_FORMAT,
        chip->image[CS4231_PLAYBK_FORMAT]);
   snd_wss_out(chip, CS4231_ALT_FEATURE_1,
        chip->image[CS4231_ALT_FEATURE_1] &= ~0x10);
   udelay(100); /* Fixes audible clicks at least on GUS MAX */
   full_calib = 0;
  }
  spin_unlock_irqrestore(&chip->reg_lock, flags);
 } else if (chip->hardware == WSS_HW_AD1845) {
  unsigned rate = params_rate(params);

  /*
 * Program the AD1845 correctly for the playback stream.
 * Note that we do NOT need to toggle the MCE bit because
 * the PLAYBACK_ENABLE bit of the Interface Configuration
 * register is set.
 *
 * NOTE: We seem to need to write to the MSB before the LSB
 *       to get the correct sample frequency.
 */
  spin_lock_irqsave(&chip->reg_lock, flags);
  snd_wss_out(chip, CS4231_PLAYBK_FORMAT, (pdfr & 0xf0));
  snd_wss_out(chip, AD1845_UPR_FREQ_SEL, (rate >> 8) & 0xff);
  snd_wss_out(chip, AD1845_LWR_FREQ_SEL, rate & 0xff);
  full_calib = 0;
  spin_unlock_irqrestore(&chip->reg_lock, flags);
 }
 if (full_calib) {
  snd_wss_mce_up(chip);
  spin_lock_irqsave(&chip->reg_lock, flags);
  if (chip->hardware != WSS_HW_INTERWAVE && !chip->single_dma) {
   if (chip->image[CS4231_IFACE_CTRL] & CS4231_RECORD_ENABLE)
    pdfr = (pdfr & 0xf0) |
           (chip->image[CS4231_REC_FORMAT] & 0x0f);
  } else {
   chip->image[CS4231_PLAYBK_FORMAT] = pdfr;
  }
  snd_wss_out(chip, CS4231_PLAYBK_FORMAT, pdfr);
  spin_unlock_irqrestore(&chip->reg_lock, flags);
  if (chip->hardware == WSS_HW_OPL3SA2)
   udelay(100); /* this seems to help */
  snd_wss_mce_down(chip);
 }
 mutex_unlock(&chip->mce_mutex);
}

static void snd_wss_capture_format(struct snd_wss *chip,
       struct snd_pcm_hw_params *params,
       unsigned char cdfr)
{
 unsigned long flags;
 int full_calib = 1;

 mutex_lock(&chip->mce_mutex);
 if (chip->hardware == WSS_HW_CS4231A ||
     (chip->hardware & WSS_HW_CS4232_MASK)) {
  spin_lock_irqsave(&chip->reg_lock, flags);
  if ((chip->image[CS4231_PLAYBK_FORMAT] & 0x0f) == (cdfr & 0x0f) || /* rate is same? */
      (chip->image[CS4231_IFACE_CTRL] & CS4231_PLAYBACK_ENABLE)) {
   snd_wss_out(chip, CS4231_ALT_FEATURE_1,
    chip->image[CS4231_ALT_FEATURE_1] | 0x20);
   snd_wss_out(chip, CS4231_REC_FORMAT,
    chip->image[CS4231_REC_FORMAT] = cdfr);
   snd_wss_out(chip, CS4231_ALT_FEATURE_1,
    chip->image[CS4231_ALT_FEATURE_1] &= ~0x20);
   full_calib = 0;
  }
  spin_unlock_irqrestore(&chip->reg_lock, flags);
 } else if (chip->hardware == WSS_HW_AD1845) {
  unsigned rate = params_rate(params);

  /*
 * Program the AD1845 correctly for the capture stream.
 * Note that we do NOT need to toggle the MCE bit because
 * the PLAYBACK_ENABLE bit of the Interface Configuration
 * register is set.
 *
 * NOTE: We seem to need to write to the MSB before the LSB
 *       to get the correct sample frequency.
 */
  spin_lock_irqsave(&chip->reg_lock, flags);
  snd_wss_out(chip, CS4231_REC_FORMAT, (cdfr & 0xf0));
  snd_wss_out(chip, AD1845_UPR_FREQ_SEL, (rate >> 8) & 0xff);
  snd_wss_out(chip, AD1845_LWR_FREQ_SEL, rate & 0xff);
  full_calib = 0;
  spin_unlock_irqrestore(&chip->reg_lock, flags);
 }
 if (full_calib) {
  snd_wss_mce_up(chip);
  spin_lock_irqsave(&chip->reg_lock, flags);
  if (chip->hardware != WSS_HW_INTERWAVE &&
      !(chip->image[CS4231_IFACE_CTRL] & CS4231_PLAYBACK_ENABLE)) {
   if (chip->single_dma)
    snd_wss_out(chip, CS4231_PLAYBK_FORMAT, cdfr);
   else
    snd_wss_out(chip, CS4231_PLAYBK_FORMAT,
       (chip->image[CS4231_PLAYBK_FORMAT] & 0xf0) |
       (cdfr & 0x0f));
   spin_unlock_irqrestore(&chip->reg_lock, flags);
   snd_wss_mce_down(chip);
   snd_wss_mce_up(chip);
   spin_lock_irqsave(&chip->reg_lock, flags);
  }
  if (chip->hardware & WSS_HW_AD1848_MASK)
   snd_wss_out(chip, CS4231_PLAYBK_FORMAT, cdfr);
  else
   snd_wss_out(chip, CS4231_REC_FORMAT, cdfr);
  spin_unlock_irqrestore(&chip->reg_lock, flags);
  snd_wss_mce_down(chip);
 }
 mutex_unlock(&chip->mce_mutex);
}

/*
 *  Timer interface
 */

static unsigned long snd_wss_timer_resolution(struct snd_timer *timer)
{
 struct snd_wss *chip = snd_timer_chip(timer);
 if (chip->hardware & WSS_HW_CS4236B_MASK)
  return 14467;
 else
  return chip->image[CS4231_PLAYBK_FORMAT] & 1 ? 9969 : 9920;
}

static int snd_wss_timer_start(struct snd_timer *timer)
{
 unsigned long flags;
 unsigned int ticks;
 struct snd_wss *chip = snd_timer_chip(timer);
 spin_lock_irqsave(&chip->reg_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]) {
  chip->image[CS4231_TIMER_HIGH] = (unsigned char) (ticks >> 8);
  snd_wss_out(chip, CS4231_TIMER_HIGH,
       chip->image[CS4231_TIMER_HIGH]);
  chip->image[CS4231_TIMER_LOW] = (unsigned char) ticks;
  snd_wss_out(chip, CS4231_TIMER_LOW,
       chip->image[CS4231_TIMER_LOW]);
  snd_wss_out(chip, CS4231_ALT_FEATURE_1,
       chip->image[CS4231_ALT_FEATURE_1] |
       CS4231_TIMER_ENABLE);
 }
 spin_unlock_irqrestore(&chip->reg_lock, flags);
 return 0;
}

static int snd_wss_timer_stop(struct snd_timer *timer)
{
 unsigned long flags;
 struct snd_wss *chip = snd_timer_chip(timer);
 spin_lock_irqsave(&chip->reg_lock, flags);
 chip->image[CS4231_ALT_FEATURE_1] &= ~CS4231_TIMER_ENABLE;
 snd_wss_out(chip, CS4231_ALT_FEATURE_1,
      chip->image[CS4231_ALT_FEATURE_1]);
 spin_unlock_irqrestore(&chip->reg_lock, flags);
 return 0;
}

static void snd_wss_init(struct snd_wss *chip)
{
 unsigned long flags;

 snd_wss_calibrate_mute(chip, 1);
 snd_wss_mce_down(chip);

#ifdef SNDRV_DEBUG_MCE
 dev_dbg(chip->card->dev, "init: (1)\n");
#endif
 snd_wss_mce_up(chip);
 spin_lock_irqsave(&chip->reg_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_wss_out(chip, CS4231_IFACE_CTRL, chip->image[CS4231_IFACE_CTRL]);
 spin_unlock_irqrestore(&chip->reg_lock, flags);
 snd_wss_mce_down(chip);

#ifdef SNDRV_DEBUG_MCE
 dev_dbg(chip->card->dev, "init: (2)\n");
#endif

 snd_wss_mce_up(chip);
 spin_lock_irqsave(&chip->reg_lock, flags);
 chip->image[CS4231_IFACE_CTRL] &= ~CS4231_AUTOCALIB;
 snd_wss_out(chip, CS4231_IFACE_CTRL, chip->image[CS4231_IFACE_CTRL]);
 snd_wss_out(chip,
      CS4231_ALT_FEATURE_1, chip->image[CS4231_ALT_FEATURE_1]);
 spin_unlock_irqrestore(&chip->reg_lock, flags);
 snd_wss_mce_down(chip);

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

 spin_lock_irqsave(&chip->reg_lock, flags);
 snd_wss_out(chip, CS4231_ALT_FEATURE_2,
      chip->image[CS4231_ALT_FEATURE_2]);
 spin_unlock_irqrestore(&chip->reg_lock, flags);

 snd_wss_mce_up(chip);
 spin_lock_irqsave(&chip->reg_lock, flags);
 snd_wss_out(chip, CS4231_PLAYBK_FORMAT,
      chip->image[CS4231_PLAYBK_FORMAT]);
 spin_unlock_irqrestore(&chip->reg_lock, flags);
 snd_wss_mce_down(chip);

#ifdef SNDRV_DEBUG_MCE
 dev_dbg(chip->card->dev, "init: (4)\n");
#endif

 snd_wss_mce_up(chip);
 spin_lock_irqsave(&chip->reg_lock, flags);
 if (!(chip->hardware & WSS_HW_AD1848_MASK))
  snd_wss_out(chip, CS4231_REC_FORMAT,
       chip->image[CS4231_REC_FORMAT]);
 spin_unlock_irqrestore(&chip->reg_lock, flags);
 snd_wss_mce_down(chip);
 snd_wss_calibrate_mute(chip, 0);

#ifdef SNDRV_DEBUG_MCE
 dev_dbg(chip->card->dev, "init: (5)\n");
#endif
}

static int snd_wss_open(struct snd_wss *chip, unsigned int mode)
{
 unsigned long flags;

 mutex_lock(&chip->open_mutex);
 if ((chip->mode & mode) ||
     ((chip->mode & WSS_MODE_OPEN) && chip->single_dma)) {
  mutex_unlock(&chip->open_mutex);
  return -EAGAIN;
 }
 if (chip->mode & WSS_MODE_OPEN) {
  chip->mode |= mode;
  mutex_unlock(&chip->open_mutex);
  return 0;
 }
 /* ok. now enable and ack CODEC IRQ */
 spin_lock_irqsave(&chip->reg_lock, flags);
 if (!(chip->hardware & WSS_HW_AD1848_MASK)) {
  snd_wss_out(chip, CS4231_IRQ_STATUS,
       CS4231_PLAYBACK_IRQ |
       CS4231_RECORD_IRQ |
       CS4231_TIMER_IRQ);
  snd_wss_out(chip, CS4231_IRQ_STATUS, 0);
 }
 wss_outb(chip, CS4231P(STATUS), 0); /* clear IRQ */
 wss_outb(chip, CS4231P(STATUS), 0); /* clear IRQ */
 chip->image[CS4231_PIN_CTRL] |= CS4231_IRQ_ENABLE;
 snd_wss_out(chip, CS4231_PIN_CTRL, chip->image[CS4231_PIN_CTRL]);
 if (!(chip->hardware & WSS_HW_AD1848_MASK)) {
  snd_wss_out(chip, CS4231_IRQ_STATUS,
       CS4231_PLAYBACK_IRQ |
       CS4231_RECORD_IRQ |
       CS4231_TIMER_IRQ);
  snd_wss_out(chip, CS4231_IRQ_STATUS, 0);
 }
 spin_unlock_irqrestore(&chip->reg_lock, flags);

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

static void snd_wss_close(struct snd_wss *chip, unsigned int mode)
{
 unsigned long flags;

 mutex_lock(&chip->open_mutex);
 chip->mode &= ~mode;
 if (chip->mode & WSS_MODE_OPEN) {
  mutex_unlock(&chip->open_mutex);
  return;
 }
 /* disable IRQ */
 spin_lock_irqsave(&chip->reg_lock, flags);
 if (!(chip->hardware & WSS_HW_AD1848_MASK))
  snd_wss_out(chip, CS4231_IRQ_STATUS, 0);
 wss_outb(chip, CS4231P(STATUS), 0); /* clear IRQ */
 wss_outb(chip, CS4231P(STATUS), 0); /* clear IRQ */
 chip->image[CS4231_PIN_CTRL] &= ~CS4231_IRQ_ENABLE;
 snd_wss_out(chip, CS4231_PIN_CTRL, chip->image[CS4231_PIN_CTRL]);

 /* 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->reg_lock, flags);
  snd_wss_mce_up(chip);
  spin_lock_irqsave(&chip->reg_lock, flags);
  chip->image[CS4231_IFACE_CTRL] &= ~(CS4231_PLAYBACK_ENABLE | CS4231_PLAYBACK_PIO |
           CS4231_RECORD_ENABLE | CS4231_RECORD_PIO);
  snd_wss_out(chip, CS4231_IFACE_CTRL,
       chip->image[CS4231_IFACE_CTRL]);
  spin_unlock_irqrestore(&chip->reg_lock, flags);
  snd_wss_mce_down(chip);
  spin_lock_irqsave(&chip->reg_lock, flags);
 }

 /* clear IRQ again */
 if (!(chip->hardware & WSS_HW_AD1848_MASK))
  snd_wss_out(chip, CS4231_IRQ_STATUS, 0);
 wss_outb(chip, CS4231P(STATUS), 0); /* clear IRQ */
 wss_outb(chip, CS4231P(STATUS), 0); /* clear IRQ */
 spin_unlock_irqrestore(&chip->reg_lock, flags);

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

/*
 *  timer open/close
 */

static int snd_wss_timer_open(struct snd_timer *timer)
{
 struct snd_wss *chip = snd_timer_chip(timer);
 snd_wss_open(chip, WSS_MODE_TIMER);
 return 0;
}

static int snd_wss_timer_close(struct snd_timer *timer)
{
 struct snd_wss *chip = snd_timer_chip(timer);
 snd_wss_close(chip, WSS_MODE_TIMER);
 return 0;
}

static const struct snd_timer_hardware snd_wss_timer_table =
{
 .flags = SNDRV_TIMER_HW_AUTO,
 .resolution = 9945,
 .ticks = 65535,
 .open =  snd_wss_timer_open,
 .close = snd_wss_timer_close,
 .c_resolution = snd_wss_timer_resolution,
 .start = snd_wss_timer_start,
 .stop =  snd_wss_timer_stop,
};

/*
 *  ok.. exported functions..
 */

static int snd_wss_playback_hw_params(struct snd_pcm_substream *substream,
      struct snd_pcm_hw_params *hw_params)
{
 struct snd_wss *chip = snd_pcm_substream_chip(substream);
 unsigned char new_pdfr;

 new_pdfr = snd_wss_get_format(chip, params_format(hw_params),
    params_channels(hw_params)) |
    snd_wss_get_rate(params_rate(hw_params));
 chip->set_playback_format(chip, hw_params, new_pdfr);
 return 0;
}

static int snd_wss_playback_prepare(struct snd_pcm_substream *substream)
{
 struct snd_wss *chip = snd_pcm_substream_chip(substream);
 struct snd_pcm_runtime *runtime = substream->runtime;
 unsigned long flags;
 unsigned int size = snd_pcm_lib_buffer_bytes(substream);
 unsigned int count = snd_pcm_lib_period_bytes(substream);

 spin_lock_irqsave(&chip->reg_lock, flags);
 chip->p_dma_size = size;
 chip->image[CS4231_IFACE_CTRL] &= ~(CS4231_PLAYBACK_ENABLE | CS4231_PLAYBACK_PIO);
 snd_dma_program(chip->dma1, runtime->dma_addr, size, DMA_MODE_WRITE | DMA_AUTOINIT);
 count = snd_wss_get_count(chip->image[CS4231_PLAYBK_FORMAT], count) - 1;
 snd_wss_out(chip, CS4231_PLY_LWR_CNT, (unsigned char) count);
 snd_wss_out(chip, CS4231_PLY_UPR_CNT, (unsigned char) (count >> 8));
 spin_unlock_irqrestore(&chip->reg_lock, flags);
#if 0
 snd_wss_debug(chip);
#endif
 return 0;
}

static int snd_wss_capture_hw_params(struct snd_pcm_substream *substream,
     struct snd_pcm_hw_params *hw_params)
{
 struct snd_wss *chip = snd_pcm_substream_chip(substream);
 unsigned char new_cdfr;

 new_cdfr = snd_wss_get_format(chip, params_format(hw_params),
      params_channels(hw_params)) |
      snd_wss_get_rate(params_rate(hw_params));
 chip->set_capture_format(chip, hw_params, new_cdfr);
 return 0;
}

static int snd_wss_capture_prepare(struct snd_pcm_substream *substream)
{
 struct snd_wss *chip = snd_pcm_substream_chip(substream);
 struct snd_pcm_runtime *runtime = substream->runtime;
 unsigned long flags;
 unsigned int size = snd_pcm_lib_buffer_bytes(substream);
 unsigned int count = snd_pcm_lib_period_bytes(substream);

 spin_lock_irqsave(&chip->reg_lock, flags);
 chip->c_dma_size = size;
 chip->image[CS4231_IFACE_CTRL] &= ~(CS4231_RECORD_ENABLE | CS4231_RECORD_PIO);
 snd_dma_program(chip->dma2, runtime->dma_addr, size, DMA_MODE_READ | DMA_AUTOINIT);
 if (chip->hardware & WSS_HW_AD1848_MASK)
  count = snd_wss_get_count(chip->image[CS4231_PLAYBK_FORMAT],
       count);
 else
  count = snd_wss_get_count(chip->image[CS4231_REC_FORMAT],
       count);
 count--;
 if (chip->single_dma && chip->hardware != WSS_HW_INTERWAVE) {
  snd_wss_out(chip, CS4231_PLY_LWR_CNT, (unsigned char) count);
  snd_wss_out(chip, CS4231_PLY_UPR_CNT,
       (unsigned char) (count >> 8));
 } else {
  snd_wss_out(chip, CS4231_REC_LWR_CNT, (unsigned char) count);
  snd_wss_out(chip, CS4231_REC_UPR_CNT,
       (unsigned char) (count >> 8));
 }
 spin_unlock_irqrestore(&chip->reg_lock, flags);
 return 0;
}

void snd_wss_overrange(struct snd_wss *chip)
{
 unsigned long flags;
 unsigned char res;

 spin_lock_irqsave(&chip->reg_lock, flags);
 res = snd_wss_in(chip, CS4231_TEST_INIT);
 spin_unlock_irqrestore(&chip->reg_lock, flags);
 if (res & (0x08 | 0x02)) /* detect overrange only above 0dB; may be user selectable? */
  chip->capture_substream->runtime->overrange++;
}
EXPORT_SYMBOL(snd_wss_overrange);

irqreturn_t snd_wss_interrupt(int irq, void *dev_id)
{
 struct snd_wss *chip = dev_id;
 unsigned char status;

 if (chip->hardware & WSS_HW_AD1848_MASK)
  /* pretend it was the only possible irq for AD1848 */
  status = CS4231_PLAYBACK_IRQ;
 else
  status = snd_wss_in(chip, CS4231_IRQ_STATUS);
 if (status & CS4231_TIMER_IRQ) {
  if (chip->timer)
   snd_timer_interrupt(chip->timer, chip->timer->sticks);
 }
 if (chip->single_dma && chip->hardware != WSS_HW_INTERWAVE) {
  if (status & CS4231_PLAYBACK_IRQ) {
   if (chip->mode & WSS_MODE_PLAY) {
    if (chip->playback_substream)
     snd_pcm_period_elapsed(chip->playback_substream);
   }
   if (chip->mode & WSS_MODE_RECORD) {
    if (chip->capture_substream) {
     snd_wss_overrange(chip);
     snd_pcm_period_elapsed(chip->capture_substream);
    }
   }
  }
 } else {
  if (status & CS4231_PLAYBACK_IRQ) {
   if (chip->playback_substream)
    snd_pcm_period_elapsed(chip->playback_substream);
  }
  if (status & CS4231_RECORD_IRQ) {
   if (chip->capture_substream) {
    snd_wss_overrange(chip);
    snd_pcm_period_elapsed(chip->capture_substream);
   }
  }
 }

 spin_lock(&chip->reg_lock);
 status = ~CS4231_ALL_IRQS | ~status;
 if (chip->hardware & WSS_HW_AD1848_MASK)
  wss_outb(chip, CS4231P(STATUS), 0);
 else
  snd_wss_out(chip, CS4231_IRQ_STATUS, status);
 spin_unlock(&chip->reg_lock);
 return IRQ_HANDLED;
}
EXPORT_SYMBOL(snd_wss_interrupt);

static snd_pcm_uframes_t snd_wss_playback_pointer(struct snd_pcm_substream *substream)
{
 struct snd_wss *chip = snd_pcm_substream_chip(substream);
 size_t ptr;

 if (!(chip->image[CS4231_IFACE_CTRL] & CS4231_PLAYBACK_ENABLE))
  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_wss_capture_pointer(struct snd_pcm_substream *substream)
{
 struct snd_wss *chip = snd_pcm_substream_chip(substream);
 size_t ptr;

 if (!(chip->image[CS4231_IFACE_CTRL] & CS4231_RECORD_ENABLE))
  return 0;
 ptr = snd_dma_pointer(chip->dma2, chip->c_dma_size);
 return bytes_to_frames(substream->runtime, ptr);
}

/*

 */

static int snd_ad1848_probe(struct snd_wss *chip)
{
 unsigned long timeout = jiffies + msecs_to_jiffies(1000);
 unsigned long flags;
 unsigned char r;
 unsigned short hardware = 0;
 int err = 0;
 int i;

 while (wss_inb(chip, CS4231P(REGSEL)) & CS4231_INIT) {
  if (time_after(jiffies, timeout))
   return -ENODEV;
  cond_resched();
 }
 spin_lock_irqsave(&chip->reg_lock, flags);

 /* set CS423x MODE 1 */
 snd_wss_dout(chip, CS4231_MISC_INFO, 0);

 snd_wss_dout(chip, CS4231_RIGHT_INPUT, 0x45); /* 0x55 & ~0x10 */
 r = snd_wss_in(chip, CS4231_RIGHT_INPUT);
 if (r != 0x45) {
  /* RMGE always high on AD1847 */
  if ((r & ~CS4231_ENABLE_MIC_GAIN) != 0x45) {
   err = -ENODEV;
   goto out;
  }
  hardware = WSS_HW_AD1847;
 } else {
  snd_wss_dout(chip, CS4231_LEFT_INPUT,  0xaa);
  r = snd_wss_in(chip, CS4231_LEFT_INPUT);
  /* L/RMGE always low on AT2320 */
  if ((r | CS4231_ENABLE_MIC_GAIN) != 0xaa) {
   err = -ENODEV;
   goto out;
  }
 }

 /* clear pending IRQ */
 wss_inb(chip, CS4231P(STATUS));
 wss_outb(chip, CS4231P(STATUS), 0);
 mb();

 if ((chip->hardware & WSS_HW_TYPE_MASK) != WSS_HW_DETECT)
  goto out;

 if (hardware) {
  chip->hardware = hardware;
  goto out;
 }

 r = snd_wss_in(chip, CS4231_MISC_INFO);

 /* set CS423x MODE 2 */
 snd_wss_dout(chip, CS4231_MISC_INFO, CS4231_MODE2);
 for (i = 0; i < 16; i++) {
  if (snd_wss_in(chip, i) != snd_wss_in(chip, 16 + i)) {
   /* we have more than 16 registers: check ID */
   if ((r & 0xf) != 0xa)
    goto out_mode;
   /*
 * on CMI8330, CS4231_VERSION is volume control and
 * can be set to 0
 */
   snd_wss_dout(chip, CS4231_VERSION, 0);
   r = snd_wss_in(chip, CS4231_VERSION) & 0xe7;
   if (!r)
    chip->hardware = WSS_HW_CMI8330;
   goto out_mode;
  }
 }
 if (r & 0x80)
  chip->hardware = WSS_HW_CS4248;
 else
  chip->hardware = WSS_HW_AD1848;
out_mode:
 snd_wss_dout(chip, CS4231_MISC_INFO, 0);
out:
 spin_unlock_irqrestore(&chip->reg_lock, flags);
 return err;
}

static int snd_wss_probe(struct snd_wss *chip)
{
 unsigned long flags;
 int i, id, rev, regnum;
 unsigned char *ptr;
 unsigned int hw;

 id = snd_ad1848_probe(chip);
 if (id < 0)
  return id;

 hw = chip->hardware;
 if ((hw & WSS_HW_TYPE_MASK) == WSS_HW_DETECT) {
  for (i = 0; i < 50; i++) {
   mb();
   if (wss_inb(chip, CS4231P(REGSEL)) & CS4231_INIT)
    msleep(2);
   else {
    spin_lock_irqsave(&chip->reg_lock, flags);
    snd_wss_out(chip, CS4231_MISC_INFO,
         CS4231_MODE2);
    id = snd_wss_in(chip, CS4231_MISC_INFO) & 0x0f;
    spin_unlock_irqrestore(&chip->reg_lock, flags);
    if (id == 0x0a)
     break; /* this is valid value */
   }
  }
  dev_dbg(chip->card->dev, "wss: port = 0x%lx, id = 0x%x\n",
   chip->port, id);
  if (id != 0x0a)
   return -ENODEV; /* no valid device found */

  rev = snd_wss_in(chip, CS4231_VERSION) & 0xe7;
  dev_dbg(chip->card->dev, "CS4231: VERSION (I25) = 0x%x\n", rev);
  if (rev == 0x80) {
   unsigned char tmp = snd_wss_in(chip, 23);
   snd_wss_out(chip, 23, ~tmp);
   if (snd_wss_in(chip, 23) != tmp)
    chip->hardware = WSS_HW_AD1845;
   else
    chip->hardware = WSS_HW_CS4231;
  } else if (rev == 0xa0) {
   chip->hardware = WSS_HW_CS4231A;
  } else if (rev == 0xa2) {
   chip->hardware = WSS_HW_CS4232;
  } else if (rev == 0xb2) {
   chip->hardware = WSS_HW_CS4232A;
  } else if (rev == 0x83) {
   chip->hardware = WSS_HW_CS4236;
  } else if (rev == 0x03) {
   chip->hardware = WSS_HW_CS4236B;
  } else {
   dev_err(chip->card->dev,
    "unknown CS chip with version 0x%x\n", rev);
   return -ENODEV;  /* unknown CS4231 chip? */
  }
 }
 spin_lock_irqsave(&chip->reg_lock, flags);
 wss_inb(chip, CS4231P(STATUS)); /* clear any pendings IRQ */
 wss_outb(chip, CS4231P(STATUS), 0);
 mb();
 spin_unlock_irqrestore(&chip->reg_lock, flags);

 if (!(chip->hardware & WSS_HW_AD1848_MASK))
  chip->image[CS4231_MISC_INFO] = CS4231_MODE2;
 switch (chip->hardware) {
 case WSS_HW_INTERWAVE:
  chip->image[CS4231_MISC_INFO] = CS4231_IW_MODE3;
  break;
 case WSS_HW_CS4235:
 case WSS_HW_CS4236B:
 case WSS_HW_CS4237B:
 case WSS_HW_CS4238B:
 case WSS_HW_CS4239:
  if (hw == WSS_HW_DETECT3)
   chip->image[CS4231_MISC_INFO] = CS4231_4236_MODE3;
  else
   chip->hardware = WSS_HW_CS4236;
  break;
 }

 chip->image[CS4231_IFACE_CTRL] =
     (chip->image[CS4231_IFACE_CTRL] & ~CS4231_SINGLE_DMA) |
     (chip->single_dma ? CS4231_SINGLE_DMA : 0);
 if (chip->hardware != WSS_HW_OPTI93X) {
  chip->image[CS4231_ALT_FEATURE_1] = 0x80;
  chip->image[CS4231_ALT_FEATURE_2] =
   chip->hardware == WSS_HW_INTERWAVE ? 0xc2 : 0x01;
 }
 /* enable fine grained frequency selection */
 if (chip->hardware == WSS_HW_AD1845)
  chip->image[AD1845_PWR_DOWN] = 8;

 ptr = (unsigned char *) &chip->image;
 regnum = (chip->hardware & WSS_HW_AD1848_MASK) ? 16 : 32;
 snd_wss_mce_down(chip);
 spin_lock_irqsave(&chip->reg_lock, flags);
 for (i = 0; i < regnum; i++) /* ok.. fill all registers */
  snd_wss_out(chip, i, *ptr++);
 spin_unlock_irqrestore(&chip->reg_lock, flags);
 snd_wss_mce_up(chip);
 snd_wss_mce_down(chip);

 mdelay(2);

 /* ok.. try check hardware version for CS4236+ chips */
 if ((hw & WSS_HW_TYPE_MASK) == WSS_HW_DETECT) {
  if (chip->hardware == WSS_HW_CS4236B) {
   rev = snd_cs4236_ext_in(chip, CS4236_VERSION);
   snd_cs4236_ext_out(chip, CS4236_VERSION, 0xff);
   id = snd_cs4236_ext_in(chip, CS4236_VERSION);
   snd_cs4236_ext_out(chip, CS4236_VERSION, rev);
   dev_dbg(chip->card->dev,
    "CS4231: ext version; rev = 0x%x, id = 0x%x\n",
    rev, id);
   if ((id & 0x1f) == 0x1d) { /* CS4235 */
    chip->hardware = WSS_HW_CS4235;
    switch (id >> 5) {
    case 4:
    case 5:
    case 6:
     break;
    default:
     dev_warn(chip->card->dev,
       "unknown CS4235 chip (enhanced version = 0x%x)\n",
       id);
    }
   } else if ((id & 0x1f) == 0x0b) { /* CS4236/B */
    switch (id >> 5) {
    case 4:
    case 5:
    case 6:
    case 7:
     chip->hardware = WSS_HW_CS4236B;
     break;
    default:
     dev_warn(chip->card->dev,
       "unknown CS4236 chip (enhanced version = 0x%x)\n",
       id);
    }
   } else if ((id & 0x1f) == 0x08) { /* CS4237B */
    chip->hardware = WSS_HW_CS4237B;
    switch (id >> 5) {
    case 4:
    case 5:
    case 6:
    case 7:
     break;
    default:
     dev_warn(chip->card->dev,
       "unknown CS4237B chip (enhanced version = 0x%x)\n",
       id);
    }
   } else if ((id & 0x1f) == 0x09) { /* CS4238B */
    chip->hardware = WSS_HW_CS4238B;
    switch (id >> 5) {
    case 5:
    case 6:
    case 7:
     break;
    default:
     dev_warn(chip->card->dev,
       "unknown CS4238B chip (enhanced version = 0x%x)\n",
       id);
    }
   } else if ((id & 0x1f) == 0x1e) { /* CS4239 */
    chip->hardware = WSS_HW_CS4239;
    switch (id >> 5) {
    case 4:
    case 5:
    case 6:
     break;
    default:
     dev_warn(chip->card->dev,
       "unknown CS4239 chip (enhanced version = 0x%x)\n",
       id);
    }
   } else {
    dev_warn(chip->card->dev,
      "unknown CS4236/CS423xB chip (enhanced version = 0x%x)\n",
      id);
   }
  }
 }
 return 0;  /* all things are ok.. */
}

/*

 */

static const struct snd_pcm_hardware snd_wss_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 = (128*1024),
 .period_bytes_min = 64,
 .period_bytes_max = (128*1024),
 .periods_min =  1,
 .periods_max =  1024,
 .fifo_size =  0,
};

static const struct snd_pcm_hardware snd_wss_capture =
{
 .info =   (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
     SNDRV_PCM_INFO_MMAP_VALID |
     SNDRV_PCM_INFO_RESUME |
     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 = (128*1024),
 .period_bytes_min = 64,
 .period_bytes_max = (128*1024),
 .periods_min =  1,
 .periods_max =  1024,
 .fifo_size =  0,
};

/*

 */

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

 runtime->hw = snd_wss_playback;

 /* hardware limitation of older chipsets */
 if (chip->hardware & WSS_HW_AD1848_MASK)
  runtime->hw.formats &= ~(SNDRV_PCM_FMTBIT_IMA_ADPCM |
      SNDRV_PCM_FMTBIT_S16_BE);

 /* hardware bug in InterWave chipset */
 if (chip->hardware == WSS_HW_INTERWAVE && chip->dma1 > 3)
  runtime->hw.formats &= ~SNDRV_PCM_FMTBIT_MU_LAW;

 /* hardware limitation of cheap chips */
 if (chip->hardware == WSS_HW_CS4235 ||
     chip->hardware == WSS_HW_CS4239)
  runtime->hw.formats = SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE;

 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);

 if (chip->claim_dma) {
  err = chip->claim_dma(chip, chip->dma_private_data, chip->dma1);
  if (err < 0)
   return err;
 }

 err = snd_wss_open(chip, WSS_MODE_PLAY);
 if (err < 0) {
  if (chip->release_dma)
   chip->release_dma(chip, chip->dma_private_data, chip->dma1);
  return err;
 }
 chip->playback_substream = substream;
 snd_pcm_set_sync(substream);
 chip->rate_constraint(runtime);
 return 0;
}

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

 runtime->hw = snd_wss_capture;

 /* hardware limitation of older chipsets */
 if (chip->hardware & WSS_HW_AD1848_MASK)
  runtime->hw.formats &= ~(SNDRV_PCM_FMTBIT_IMA_ADPCM |
      SNDRV_PCM_FMTBIT_S16_BE);

 /* hardware limitation of cheap chips */
 if (chip->hardware == WSS_HW_CS4235 ||
     chip->hardware == WSS_HW_CS4239 ||
     chip->hardware == WSS_HW_OPTI93X)
  runtime->hw.formats = SNDRV_PCM_FMTBIT_U8 |
          SNDRV_PCM_FMTBIT_S16_LE;

 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);

 if (chip->claim_dma) {
  err = chip->claim_dma(chip, chip->dma_private_data, chip->dma2);
  if (err < 0)
   return err;
 }

 err = snd_wss_open(chip, WSS_MODE_RECORD);
 if (err < 0) {
  if (chip->release_dma)
   chip->release_dma(chip, chip->dma_private_data, chip->dma2);
  return err;
 }
 chip->capture_substream = substream;
 snd_pcm_set_sync(substream);
 chip->rate_constraint(runtime);
 return 0;
}

static int snd_wss_playback_close(struct snd_pcm_substream *substream)
{
 struct snd_wss *chip = snd_pcm_substream_chip(substream);

 chip->playback_substream = NULL;
 snd_wss_close(chip, WSS_MODE_PLAY);
 return 0;
}

static int snd_wss_capture_close(struct snd_pcm_substream *substream)
{
 struct snd_wss *chip = snd_pcm_substream_chip(substream);

 chip->capture_substream = NULL;
 snd_wss_close(chip, WSS_MODE_RECORD);
 return 0;
}

static void snd_wss_thinkpad_twiddle(struct snd_wss *chip, int on)
{
 int tmp;

 if (!chip->thinkpad_flag)
  return;

 outb(0x1c, AD1848_THINKPAD_CTL_PORT1);
 tmp = inb(AD1848_THINKPAD_CTL_PORT2);

 if (on)
  /* turn it on */
  tmp |= AD1848_THINKPAD_CS4248_ENABLE_BIT;
 else
  /* turn it off */
  tmp &= ~AD1848_THINKPAD_CS4248_ENABLE_BIT;

 outb(tmp, AD1848_THINKPAD_CTL_PORT2);
}

#ifdef CONFIG_PM

/* lowlevel suspend callback for CS4231 */
static void snd_wss_suspend(struct snd_wss *chip)
{
 int reg;
 unsigned long flags;

 spin_lock_irqsave(&chip->reg_lock, flags);
 for (reg = 0; reg < 32; reg++)
  chip->image[reg] = snd_wss_in(chip, reg);
 spin_unlock_irqrestore(&chip->reg_lock, flags);
 if (chip->thinkpad_flag)
  snd_wss_thinkpad_twiddle(chip, 0);
}

/* lowlevel resume callback for CS4231 */
static void snd_wss_resume(struct snd_wss *chip)
{
 int reg;
 unsigned long flags;
 /* int timeout; */

 if (chip->thinkpad_flag)
  snd_wss_thinkpad_twiddle(chip, 1);
 snd_wss_mce_up(chip);
 spin_lock_irqsave(&chip->reg_lock, flags);
 for (reg = 0; reg < 32; reg++) {
  switch (reg) {
  case CS4231_VERSION:
   break;
  default:
   snd_wss_out(chip, reg, chip->image[reg]);
   break;
  }
 }
 /* Yamaha needs this to resume properly */
 if (chip->hardware == WSS_HW_OPL3SA2)
  snd_wss_out(chip, CS4231_PLAYBK_FORMAT,
       chip->image[CS4231_PLAYBK_FORMAT]);
 spin_unlock_irqrestore(&chip->reg_lock, flags);
#if 1
 snd_wss_mce_down(chip);
#else
 /* The following is a workaround to avoid freeze after resume on TP600E.
   This is the first half of copy of snd_wss_mce_down(), but doesn't
   include rescheduling.  -- iwai
   */
 snd_wss_busy_wait(chip);
 spin_lock_irqsave(&chip->reg_lock, flags);
 chip->mce_bit &= ~CS4231_MCE;
 timeout = wss_inb(chip, CS4231P(REGSEL));
 wss_outb(chip, CS4231P(REGSEL), chip->mce_bit | (timeout & 0x1f));
 spin_unlock_irqrestore(&chip->reg_lock, flags);
 if (timeout == 0x80)
  dev_err(chip->card->dev
   "down [0x%lx]: serious init problem - codec still busy\n",
   chip->port);
 if ((timeout & CS4231_MCE) == 0 ||
     !(chip->hardware & (WSS_HW_CS4231_MASK | WSS_HW_CS4232_MASK))) {
  return;
 }
 snd_wss_busy_wait(chip);
#endif
}
#endif /* CONFIG_PM */

const char *snd_wss_chip_id(struct snd_wss *chip)
{
 switch (chip->hardware) {
 case WSS_HW_CS4231:
  return "CS4231";
 case WSS_HW_CS4231A:
  return "CS4231A";
 case WSS_HW_CS4232:
  return "CS4232";
 case WSS_HW_CS4232A:
  return "CS4232A";
 case WSS_HW_CS4235:
  return "CS4235";
 case WSS_HW_CS4236:
  return "CS4236";
 case WSS_HW_CS4236B:
  return "CS4236B";
 case WSS_HW_CS4237B:
  return "CS4237B";
 case WSS_HW_CS4238B:
  return "CS4238B";
 case WSS_HW_CS4239:
  return "CS4239";
 case WSS_HW_INTERWAVE:
  return "AMD InterWave";
 case WSS_HW_OPL3SA2:
  return chip->card->shortname;
 case WSS_HW_AD1845:
  return "AD1845";
 case WSS_HW_OPTI93X:
  return "OPTi 93x";
 case WSS_HW_AD1847:
  return "AD1847";
 case WSS_HW_AD1848:
  return "AD1848";
 case WSS_HW_CS4248:
  return "CS4248";
 case WSS_HW_CMI8330:
  return "CMI8330/C3D";
 default:
  return "???";
 }
}
EXPORT_SYMBOL(snd_wss_chip_id);

static int snd_wss_new(struct snd_card *card,
     unsigned short hardware,
     unsigned short hwshare,
     struct snd_wss **rchip)
{
 struct snd_wss *chip;

 *rchip = NULL;
 chip = devm_kzalloc(card->dev, sizeof(*chip), GFP_KERNEL);
 if (chip == NULL)
  return -ENOMEM;
 chip->hardware = hardware;
 chip->hwshare = hwshare;

 spin_lock_init(&chip->reg_lock);
 mutex_init(&chip->mce_mutex);
 mutex_init(&chip->open_mutex);
 chip->card = card;
 chip->rate_constraint = snd_wss_xrate;
 chip->set_playback_format = snd_wss_playback_format;
 chip->set_capture_format = snd_wss_capture_format;
 if (chip->hardware == WSS_HW_OPTI93X)
  memcpy(&chip->image, &snd_opti93x_original_image,
         sizeof(snd_opti93x_original_image));
 else
  memcpy(&chip->image, &snd_wss_original_image,
         sizeof(snd_wss_original_image));
 if (chip->hardware & WSS_HW_AD1848_MASK) {
  chip->image[CS4231_PIN_CTRL] = 0;
  chip->image[CS4231_TEST_INIT] = 0;
 }

 *rchip = chip;
 return 0;
}

int snd_wss_create(struct snd_card *card,
        unsigned long port,
        unsigned long cport,
        int irq, int dma1, int dma2,
        unsigned short hardware,
        unsigned short hwshare,
        struct snd_wss **rchip)
{
 struct snd_wss *chip;
 int err;

 err = snd_wss_new(card, hardware, hwshare, &chip);
 if (err < 0)
  return err;

 chip->irq = -1;
 chip->dma1 = -1;
 chip->dma2 = -1;

 chip->res_port = devm_request_region(card->dev, port, 4, "WSS");
 if (!chip->res_port) {
  dev_err(chip->card->dev, "wss: can't grab port 0x%lx\n", port);
  return -EBUSY;
 }
 chip->port = port;
 if ((long)cport >= 0) {
  chip->res_cport = devm_request_region(card->dev, cport, 8,
            "CS4232 Control");
  if (!chip->res_cport) {
   dev_err(chip->card->dev,
    "wss: can't grab control port 0x%lx\n", cport);
   return -ENODEV;
  }
 }
 chip->cport = cport;
 if (!(hwshare & WSS_HWSHARE_IRQ))
  if (devm_request_irq(card->dev, irq, snd_wss_interrupt, 0,
         "WSS", (void *) chip)) {
   dev_err(chip->card->dev, "wss: can't grab IRQ %d\n", irq);
   return -EBUSY;
  }
 chip->irq = irq;
 card->sync_irq = chip->irq;
 if (!(hwshare & WSS_HWSHARE_DMA1) &&
     snd_devm_request_dma(card->dev, dma1, "WSS - 1")) {
  dev_err(chip->card->dev, "wss: can't grab DMA1 %d\n", dma1);
  return -EBUSY;
 }
 chip->dma1 = dma1;
 if (!(hwshare & WSS_HWSHARE_DMA2) && dma1 != dma2 && dma2 >= 0 &&
     snd_devm_request_dma(card->dev, dma2, "WSS - 2")) {
  dev_err(chip->card->dev, "wss: can't grab DMA2 %d\n", dma2);
  return -EBUSY;
 }
 if (dma1 == dma2 || dma2 < 0) {
  chip->single_dma = 1;
  chip->dma2 = chip->dma1;
 } else
  chip->dma2 = dma2;

 if (hardware == WSS_HW_THINKPAD) {
  chip->thinkpad_flag = 1;
  chip->hardware = WSS_HW_DETECT; /* reset */
  snd_wss_thinkpad_twiddle(chip, 1);
 }

 /* global setup */
 if (snd_wss_probe(chip) < 0)
  return -ENODEV;
 snd_wss_init(chip);

#if 0
 if (chip->hardware & WSS_HW_CS4232_MASK) {
  if (chip->res_cport == NULL)
   dev_err(chip->card->dev,
    "CS4232 control port features are not accessible\n");
 }
#endif

#ifdef CONFIG_PM
 /* Power Management */
 chip->suspend = snd_wss_suspend;
 chip->resume = snd_wss_resume;
#endif

 *rchip = chip;
 return 0;
}
EXPORT_SYMBOL(snd_wss_create);

static const struct snd_pcm_ops snd_wss_playback_ops = {
 .open =  snd_wss_playback_open,
 .close = snd_wss_playback_close,
 .hw_params = snd_wss_playback_hw_params,
 .prepare = snd_wss_playback_prepare,
 .trigger = snd_wss_trigger,
 .pointer = snd_wss_playback_pointer,
};

static const struct snd_pcm_ops snd_wss_capture_ops = {
 .open =  snd_wss_capture_open,
 .close = snd_wss_capture_close,
 .hw_params = snd_wss_capture_hw_params,
 .prepare = snd_wss_capture_prepare,
 .trigger = snd_wss_trigger,
 .pointer = snd_wss_capture_pointer,
};

int snd_wss_pcm(struct snd_wss *chip, int device)
{
 struct snd_pcm *pcm;
 int err;

 err = snd_pcm_new(chip->card, "WSS", device, 1, 1, &pcm);
 if (err < 0)
  return err;

 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_wss_playback_ops);
 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_wss_capture_ops);

 /* global setup */
 pcm->private_data = chip;
 pcm->info_flags = 0;
 if (chip->single_dma)
  pcm->info_flags |= SNDRV_PCM_INFO_HALF_DUPLEX;
 if (chip->hardware != WSS_HW_INTERWAVE)
  pcm->info_flags |= SNDRV_PCM_INFO_JOINT_DUPLEX;
 strscpy(pcm->name, snd_wss_chip_id(chip));

 snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_DEV, chip->card->dev,
           64*1024, chip->dma1 > 3 || chip->dma2 > 3 ? 128*1024 : 64*1024);

 chip->pcm = pcm;
 return 0;
}
EXPORT_SYMBOL(snd_wss_pcm);

static void snd_wss_timer_free(struct snd_timer *timer)
{
 struct snd_wss *chip = timer->private_data;
 chip->timer = NULL;
}

int snd_wss_timer(struct snd_wss *chip, int device)
{
 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 = chip->card->number;
 tid.device = device;
 tid.subdevice = 0;
 err = snd_timer_new(chip->card, "CS4231", &tid, &timer);
 if (err < 0)
  return err;
 strscpy(timer->name, snd_wss_chip_id(chip));
 timer->private_data = chip;
 timer->private_free = snd_wss_timer_free;
 timer->hw = snd_wss_timer_table;
 chip->timer = timer;
 return 0;
}
EXPORT_SYMBOL(snd_wss_timer);

/*
 *  MIXER part
 */

static int snd_wss_info_mux(struct snd_kcontrol *kcontrol,
       struct snd_ctl_elem_info *uinfo)
{
 static const char * const texts[4] = {
  "Line", "Aux", "Mic", "Mix"
 };
 static const char * const opl3sa_texts[4] = {
  "Line", "CD", "Mic", "Mix"
 };
 static const char * const gusmax_texts[4] = {
  "Line", "Synth", "Mic", "Mix"
 };
 const char * const *ptexts = texts;
 struct snd_wss *chip = snd_kcontrol_chip(kcontrol);

 if (snd_BUG_ON(!chip->card))
  return -EINVAL;
 if (!strcmp(chip->card->driver, "GUS MAX"))
  ptexts = gusmax_texts;
 switch (chip->hardware) {
 case WSS_HW_INTERWAVE:
  ptexts = gusmax_texts;
  break;
 case WSS_HW_OPTI93X:
 case WSS_HW_OPL3SA2:
  ptexts = opl3sa_texts;
  break;
 }
 return snd_ctl_enum_info(uinfo, 2, 4, ptexts);
}

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

 spin_lock_irqsave(&chip->reg_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->reg_lock, flags);
 return 0;
}

static int snd_wss_put_mux(struct snd_kcontrol *kcontrol,
      struct snd_ctl_elem_value *ucontrol)
{
 struct snd_wss *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->reg_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_wss_out(chip, CS4231_LEFT_INPUT, left);
 snd_wss_out(chip, CS4231_RIGHT_INPUT, right);
 spin_unlock_irqrestore(&chip->reg_lock, flags);
 return change;
}

int snd_wss_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;
}
EXPORT_SYMBOL(snd_wss_info_single);

int snd_wss_get_single(struct snd_kcontrol *kcontrol,
         struct snd_ctl_elem_value *ucontrol)
{
 struct snd_wss *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->reg_lock, flags);
 ucontrol->value.integer.value[0] = (chip->image[reg] >> shift) & mask;
 spin_unlock_irqrestore(&chip->reg_lock, flags);
 if (invert)
  ucontrol->value.integer.value[0] = mask - ucontrol->value.integer.value[0];
 return 0;
}
EXPORT_SYMBOL(snd_wss_get_single);

int snd_wss_put_single(struct snd_kcontrol *kcontrol,
         struct snd_ctl_elem_value *ucontrol)
{
 struct snd_wss *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->reg_lock, flags);
 val = (chip->image[reg] & ~(mask << shift)) | val;
 change = val != chip->image[reg];
 snd_wss_out(chip, reg, val);
 spin_unlock_irqrestore(&chip->reg_lock, flags);
 return change;
}
EXPORT_SYMBOL(snd_wss_put_single);

int snd_wss_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;
}
EXPORT_SYMBOL(snd_wss_info_double);

int snd_wss_get_double(struct snd_kcontrol *kcontrol,
         struct snd_ctl_elem_value *ucontrol)
{
 struct snd_wss *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->reg_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->reg_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;
}
EXPORT_SYMBOL(snd_wss_get_double);

int snd_wss_put_double(struct snd_kcontrol *kcontrol,
         struct snd_ctl_elem_value *ucontrol)
{
 struct snd_wss *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->reg_lock, flags);
 if (left_reg != right_reg) {
  val1 = (chip->image[left_reg] & ~(mask << shift_left)) | val1;
  val2 = (chip->image[right_reg] & ~(mask << shift_right)) | val2;
  change = val1 != chip->image[left_reg] ||
    val2 != chip->image[right_reg];
  snd_wss_out(chip, left_reg, val1);
  snd_wss_out(chip, right_reg, val2);
 } else {
  mask = (mask << shift_left) | (mask << shift_right);
  val1 = (chip->image[left_reg] & ~mask) | val1 | val2;
  change = val1 != chip->image[left_reg];
  snd_wss_out(chip, left_reg, val1);
 }
 spin_unlock_irqrestore(&chip->reg_lock, flags);
 return change;
}
EXPORT_SYMBOL(snd_wss_put_double);

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

static const struct snd_kcontrol_new snd_wss_controls[] = {
WSS_DOUBLE("PCM Playback Switch", 0,
  CS4231_LEFT_OUTPUT, CS4231_RIGHT_OUTPUT, 7, 7, 1, 1),
WSS_DOUBLE_TLV("PCM Playback Volume", 0,
  CS4231_LEFT_OUTPUT, CS4231_RIGHT_OUTPUT, 0, 0, 63, 1,
  db_scale_6bit),
WSS_DOUBLE("Aux Playback Switch", 0,
  CS4231_AUX1_LEFT_INPUT, CS4231_AUX1_RIGHT_INPUT, 7, 7, 1, 1),
WSS_DOUBLE_TLV("Aux Playback Volume", 0,
  CS4231_AUX1_LEFT_INPUT, CS4231_AUX1_RIGHT_INPUT, 0, 0, 31, 1,
  db_scale_5bit_12db_max),
WSS_DOUBLE("Aux Playback Switch", 1,
  CS4231_AUX2_LEFT_INPUT, CS4231_AUX2_RIGHT_INPUT, 7, 7, 1, 1),
WSS_DOUBLE_TLV("Aux Playback Volume", 1,
  CS4231_AUX2_LEFT_INPUT, CS4231_AUX2_RIGHT_INPUT, 0, 0, 31, 1,
  db_scale_5bit_12db_max),
WSS_DOUBLE_TLV("Capture Volume", 0, CS4231_LEFT_INPUT, CS4231_RIGHT_INPUT,
  0, 0, 15, 0, db_scale_rec_gain),
{
 .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
 .name = "Capture Source",
 .info = snd_wss_info_mux,
 .get = snd_wss_get_mux,
 .put = snd_wss_put_mux,
},
WSS_DOUBLE("Mic Boost (+20dB)", 0,
  CS4231_LEFT_INPUT, CS4231_RIGHT_INPUT, 5, 5, 1, 0),
WSS_SINGLE("Loopback Capture Switch", 0,
  CS4231_LOOPBACK, 0, 1, 0),
WSS_SINGLE_TLV("Loopback Capture Volume", 0, CS4231_LOOPBACK, 2, 63, 1,
  db_scale_6bit),
WSS_DOUBLE("Line Playback Switch", 0,
  CS4231_LEFT_LINE_IN, CS4231_RIGHT_LINE_IN, 7, 7, 1, 1),
WSS_DOUBLE_TLV("Line Playback Volume", 0,
  CS4231_LEFT_LINE_IN, CS4231_RIGHT_LINE_IN, 0, 0, 31, 1,
  db_scale_5bit_12db_max),
WSS_SINGLE("Beep Playback Switch", 0,
  CS4231_MONO_CTRL, 7, 1, 1),
WSS_SINGLE_TLV("Beep Playback Volume", 0,
  CS4231_MONO_CTRL, 0, 15, 1,
  db_scale_4bit),
WSS_SINGLE("Mono Output Playback Switch", 0,
  CS4231_MONO_CTRL, 6, 1, 1),
WSS_SINGLE("Beep Bypass Playback Switch", 0,
  CS4231_MONO_CTRL, 5, 1, 0),
};

int snd_wss_mixer(struct snd_wss *chip)
{
 struct snd_card *card;
 unsigned int idx;
 int err;
 int count = ARRAY_SIZE(snd_wss_controls);

 if (snd_BUG_ON(!chip || !chip->pcm))
  return -EINVAL;

 card = chip->card;

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

 /* Use only the first 11 entries on AD1848 */
 if (chip->hardware & WSS_HW_AD1848_MASK)
  count = 11;
 /* There is no loopback on OPTI93X */
 else if (chip->hardware == WSS_HW_OPTI93X)
  count = 9;

 for (idx = 0; idx < count; idx++) {
  err = snd_ctl_add(card,
    snd_ctl_new1(&snd_wss_controls[idx],
          chip));
  if (err < 0)
   return err;
 }
 return 0;
}
EXPORT_SYMBOL(snd_wss_mixer);

const struct snd_pcm_ops *snd_wss_get_pcm_ops(int direction)
{
 return direction == SNDRV_PCM_STREAM_PLAYBACK ?
  &snd_wss_playback_ops : &snd_wss_capture_ops;
}
EXPORT_SYMBOL(snd_wss_get_pcm_ops);