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cx88-alsa.c

/*
 *
 *  Support for audio capture
 *  PCI function #1 of the cx2388x.
 *
 *    (c) 2007 Trent Piepho <xyzzy@speakeasy.org>
 *    (c) 2005,2006 Ricardo Cerqueira <v4l@cerqueira.org>
 *    (c) 2005 Mauro Carvalho Chehab <mchehab@infradead.org>
 *    Based on a dummy cx88 module by Gerd Knorr <kraxel@bytesex.org>
 *    Based on dummy.c by Jaroslav Kysela <perex@perex.cz>
 *
 *  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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/vmalloc.h>
#include <linux/dma-mapping.h>
#include <linux/pci.h>

#include <asm/delay.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/control.h>
#include <sound/initval.h>
#include <sound/tlv.h>

#include "cx88.h"
#include "cx88-reg.h"

#define dprintk(level,fmt, arg...)  if (debug >= level) \
      printk(KERN_INFO "%s/1: " fmt, chip->core->name , ## arg)

#define dprintk_core(level,fmt, arg...)   if (debug >= level) \
      printk(KERN_DEBUG "%s/1: " fmt, chip->core->name , ## arg)

/****************************************************************************
      Data type declarations - Can be moded to a header file later
 ****************************************************************************/

struct cx88_audio_dev {
      struct cx88_core           *core;
      struct cx88_dmaqueue       q;

      /* pci i/o */
      struct pci_dev             *pci;

      /* audio controls */
      int                        irq;

      struct snd_card            *card;

      spinlock_t                 reg_lock;
      atomic_t             count;

      unsigned int               dma_size;
      unsigned int               period_size;
      unsigned int               num_periods;

      struct videobuf_dmabuf     *dma_risc;

      struct cx88_buffer         *buf;

      struct snd_pcm_substream   *substream;
};
typedef struct cx88_audio_dev snd_cx88_card_t;




/****************************************************************************
                  Module global static vars
 ****************************************************************************/

static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;    /* Index 0-MAX */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;     /* ID for this card */
static int enable[SNDRV_CARDS] = {1, [1 ... (SNDRV_CARDS - 1)] = 1};

module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable cx88x soundcard. default enabled.");

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for cx88x capture interface(s).");


/****************************************************************************
                        Module macros
 ****************************************************************************/

MODULE_DESCRIPTION("ALSA driver module for cx2388x based TV cards");
MODULE_AUTHOR("Ricardo Cerqueira");
MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@infradead.org>");
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Conexant,23881},"
                  "{{Conexant,23882},"
                  "{{Conexant,23883}");
static unsigned int debug;
module_param(debug,int,0644);
MODULE_PARM_DESC(debug,"enable debug messages");

/****************************************************************************
                  Module specific funtions
 ****************************************************************************/

/*
 * BOARD Specific: Sets audio DMA
 */

static int _cx88_start_audio_dma(snd_cx88_card_t *chip)
{
      struct cx88_buffer   *buf = chip->buf;
      struct cx88_core *core=chip->core;
      struct sram_channel *audio_ch = &cx88_sram_channels[SRAM_CH25];

      /* Make sure RISC/FIFO are off before changing FIFO/RISC settings */
      cx_clear(MO_AUD_DMACNTRL, 0x11);

      /* setup fifo + format - out channel */
      cx88_sram_channel_setup(chip->core, audio_ch, buf->bpl, buf->risc.dma);

      /* sets bpl size */
      cx_write(MO_AUDD_LNGTH, buf->bpl);

      /* reset counter */
      cx_write(MO_AUDD_GPCNTRL, GP_COUNT_CONTROL_RESET);
      atomic_set(&chip->count, 0);

      dprintk(1, "Start audio DMA, %d B/line, %d lines/FIFO, %d periods, %d "
            "byte buffer\n", buf->bpl, cx_read(audio_ch->cmds_start + 8)>>1,
            chip->num_periods, buf->bpl * chip->num_periods);

      /* Enables corresponding bits at AUD_INT_STAT */
      cx_write(MO_AUD_INTMSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
                        AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);

      /* Clean any pending interrupt bits already set */
      cx_write(MO_AUD_INTSTAT, ~0);

      /* enable audio irqs */
      cx_set(MO_PCI_INTMSK, chip->core->pci_irqmask | PCI_INT_AUDINT);

      /* start dma */
      cx_set(MO_DEV_CNTRL2, (1<<5)); /* Enables Risc Processor */
      cx_set(MO_AUD_DMACNTRL, 0x11); /* audio downstream FIFO and RISC enable */

      if (debug)
            cx88_sram_channel_dump(chip->core, audio_ch);

      return 0;
}

/*
 * BOARD Specific: Resets audio DMA
 */
static int _cx88_stop_audio_dma(snd_cx88_card_t *chip)
{
      struct cx88_core *core=chip->core;
      dprintk(1, "Stopping audio DMA\n");

      /* stop dma */
      cx_clear(MO_AUD_DMACNTRL, 0x11);

      /* disable irqs */
      cx_clear(MO_PCI_INTMSK, PCI_INT_AUDINT);
      cx_clear(MO_AUD_INTMSK, AUD_INT_OPC_ERR | AUD_INT_DN_SYNC |
                        AUD_INT_DN_RISCI2 | AUD_INT_DN_RISCI1);

      if (debug)
            cx88_sram_channel_dump(chip->core, &cx88_sram_channels[SRAM_CH25]);

      return 0;
}

#define MAX_IRQ_LOOP 50

/*
 * BOARD Specific: IRQ dma bits
 */
static char *cx88_aud_irqs[32] = {
      "dn_risci1", "up_risci1", "rds_dn_risc1", /* 0-2 */
      NULL,                           /* reserved */
      "dn_risci2", "up_risci2", "rds_dn_risc2", /* 4-6 */
      NULL,                           /* reserved */
      "dnf_of", "upf_uf", "rds_dnf_uf",     /* 8-10 */
      NULL,                           /* reserved */
      "dn_sync", "up_sync", "rds_dn_sync",        /* 12-14 */
      NULL,                           /* reserved */
      "opc_err", "par_err", "rip_err",      /* 16-18 */
      "pci_abort", "ber_irq", "mchg_irq"    /* 19-21 */
};

/*
 * BOARD Specific: Threats IRQ audio specific calls
 */
static void cx8801_aud_irq(snd_cx88_card_t *chip)
{
      struct cx88_core *core = chip->core;
      u32 status, mask;

      status = cx_read(MO_AUD_INTSTAT);
      mask   = cx_read(MO_AUD_INTMSK);
      if (0 == (status & mask))
            return;
      cx_write(MO_AUD_INTSTAT, status);
      if (debug > 1  ||  (status & mask & ~0xff))
            cx88_print_irqbits(core->name, "irq aud",
                           cx88_aud_irqs, ARRAY_SIZE(cx88_aud_irqs),
                           status, mask);
      /* risc op code error */
      if (status & AUD_INT_OPC_ERR) {
            printk(KERN_WARNING "%s/1: Audio risc op code error\n",core->name);
            cx_clear(MO_AUD_DMACNTRL, 0x11);
            cx88_sram_channel_dump(core, &cx88_sram_channels[SRAM_CH25]);
      }
      if (status & AUD_INT_DN_SYNC) {
            dprintk(1, "Downstream sync error\n");
            cx_write(MO_AUDD_GPCNTRL, GP_COUNT_CONTROL_RESET);
            return;
      }
      /* risc1 downstream */
      if (status & AUD_INT_DN_RISCI1) {
            atomic_set(&chip->count, cx_read(MO_AUDD_GPCNT));
            snd_pcm_period_elapsed(chip->substream);
      }
      /* FIXME: Any other status should deserve a special handling? */
}

/*
 * BOARD Specific: Handles IRQ calls
 */
static irqreturn_t cx8801_irq(int irq, void *dev_id)
{
      snd_cx88_card_t *chip = dev_id;
      struct cx88_core *core = chip->core;
      u32 status;
      int loop, handled = 0;

      for (loop = 0; loop < MAX_IRQ_LOOP; loop++) {
            status = cx_read(MO_PCI_INTSTAT) &
                  (core->pci_irqmask | PCI_INT_AUDINT);
            if (0 == status)
                  goto out;
            dprintk(3, "cx8801_irq loop %d/%d, status %x\n",
                  loop, MAX_IRQ_LOOP, status);
            handled = 1;
            cx_write(MO_PCI_INTSTAT, status);

            if (status & core->pci_irqmask)
                  cx88_core_irq(core, status);
            if (status & PCI_INT_AUDINT)
                  cx8801_aud_irq(chip);
      }

      if (MAX_IRQ_LOOP == loop) {
            printk(KERN_ERR
                   "%s/1: IRQ loop detected, disabling interrupts\n",
                   core->name);
            cx_clear(MO_PCI_INTMSK, PCI_INT_AUDINT);
      }

 out:
      return IRQ_RETVAL(handled);
}


static int dsp_buffer_free(snd_cx88_card_t *chip)
{
      BUG_ON(!chip->dma_size);

      dprintk(2,"Freeing buffer\n");
      videobuf_pci_dma_unmap(chip->pci, chip->dma_risc);
      videobuf_dma_free(chip->dma_risc);
      btcx_riscmem_free(chip->pci,&chip->buf->risc);
      kfree(chip->buf);

      chip->dma_risc = NULL;
      chip->dma_size = 0;

      return 0;
}

/****************************************************************************
                        ALSA PCM Interface
 ****************************************************************************/

/*
 * Digital hardware definition
 */
#define DEFAULT_FIFO_SIZE     4096
static struct snd_pcm_hardware snd_cx88_digital_hw = {
      .info = SNDRV_PCM_INFO_MMAP |
            SNDRV_PCM_INFO_INTERLEAVED |
            SNDRV_PCM_INFO_BLOCK_TRANSFER |
            SNDRV_PCM_INFO_MMAP_VALID,
      .formats = SNDRV_PCM_FMTBIT_S16_LE,

      .rates =          SNDRV_PCM_RATE_48000,
      .rate_min =       48000,
      .rate_max =       48000,
      .channels_min = 2,
      .channels_max = 2,
      /* Analog audio output will be full of clicks and pops if there
         are not exactly four lines in the SRAM FIFO buffer.  */
      .period_bytes_min = DEFAULT_FIFO_SIZE/4,
      .period_bytes_max = DEFAULT_FIFO_SIZE/4,
      .periods_min = 1,
      .periods_max = 1024,
      .buffer_bytes_max = (1024*1024),
};

/*
 * audio pcm capture open callback
 */
static int snd_cx88_pcm_open(struct snd_pcm_substream *substream)
{
      snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      int err;

      err = snd_pcm_hw_constraint_pow2(runtime, 0, SNDRV_PCM_HW_PARAM_PERIODS);
      if (err < 0)
            goto _error;

      chip->substream = substream;

      runtime->hw = snd_cx88_digital_hw;

      if (cx88_sram_channels[SRAM_CH25].fifo_size != DEFAULT_FIFO_SIZE) {
            unsigned int bpl = cx88_sram_channels[SRAM_CH25].fifo_size / 4;
            bpl &= ~7; /* must be multiple of 8 */
            runtime->hw.period_bytes_min = bpl;
            runtime->hw.period_bytes_max = bpl;
      }

      return 0;
_error:
      dprintk(1,"Error opening PCM!\n");
      return err;
}

/*
 * audio close callback
 */
static int snd_cx88_close(struct snd_pcm_substream *substream)
{
      return 0;
}

/*
 * hw_params callback
 */
static int snd_cx88_hw_params(struct snd_pcm_substream * substream,
                        struct snd_pcm_hw_params * hw_params)
{
      snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
      struct videobuf_dmabuf *dma;

      struct cx88_buffer *buf;
      int ret;

      if (substream->runtime->dma_area) {
            dsp_buffer_free(chip);
            substream->runtime->dma_area = NULL;
      }

      chip->period_size = params_period_bytes(hw_params);
      chip->num_periods = params_periods(hw_params);
      chip->dma_size = chip->period_size * params_periods(hw_params);

      BUG_ON(!chip->dma_size);
      BUG_ON(chip->num_periods & (chip->num_periods-1));

      buf = videobuf_pci_alloc(sizeof(*buf));
      if (NULL == buf)
            return -ENOMEM;

      buf->vb.memory = V4L2_MEMORY_MMAP;
      buf->vb.field  = V4L2_FIELD_NONE;
      buf->vb.width  = chip->period_size;
      buf->bpl       = chip->period_size;
      buf->vb.height = chip->num_periods;
      buf->vb.size   = chip->dma_size;

      dma=videobuf_to_dma(&buf->vb);
      videobuf_dma_init(dma);
      ret = videobuf_dma_init_kernel(dma, PCI_DMA_FROMDEVICE,
                  (PAGE_ALIGN(buf->vb.size) >> PAGE_SHIFT));
      if (ret < 0)
            goto error;

      ret = videobuf_pci_dma_map(chip->pci,dma);
      if (ret < 0)
            goto error;

      ret = cx88_risc_databuffer(chip->pci, &buf->risc, dma->sglist,
                           buf->vb.width, buf->vb.height, 1);
      if (ret < 0)
            goto error;

      /* Loop back to start of program */
      buf->risc.jmp[0] = cpu_to_le32(RISC_JUMP|RISC_IRQ1|RISC_CNT_INC);
      buf->risc.jmp[1] = cpu_to_le32(buf->risc.dma);

      buf->vb.state = VIDEOBUF_PREPARED;

      chip->buf = buf;
      chip->dma_risc = dma;

      substream->runtime->dma_area = chip->dma_risc->vmalloc;
      substream->runtime->dma_bytes = chip->dma_size;
      substream->runtime->dma_addr = 0;
      return 0;

error:
      kfree(buf);
      return ret;
}

/*
 * hw free callback
 */
static int snd_cx88_hw_free(struct snd_pcm_substream * substream)
{

      snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);

      if (substream->runtime->dma_area) {
            dsp_buffer_free(chip);
            substream->runtime->dma_area = NULL;
      }

      return 0;
}

/*
 * prepare callback
 */
static int snd_cx88_prepare(struct snd_pcm_substream *substream)
{
      return 0;
}

/*
 * trigger callback
 */
static int snd_cx88_card_trigger(struct snd_pcm_substream *substream, int cmd)
{
      snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
      int err;

      /* Local interrupts are already disabled by ALSA */
      spin_lock(&chip->reg_lock);

      switch (cmd) {
      case SNDRV_PCM_TRIGGER_START:
            err=_cx88_start_audio_dma(chip);
            break;
      case SNDRV_PCM_TRIGGER_STOP:
            err=_cx88_stop_audio_dma(chip);
            break;
      default:
            err=-EINVAL;
            break;
      }

      spin_unlock(&chip->reg_lock);

      return err;
}

/*
 * pointer callback
 */
static snd_pcm_uframes_t snd_cx88_pointer(struct snd_pcm_substream *substream)
{
      snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);
      struct snd_pcm_runtime *runtime = substream->runtime;
      u16 count;

      count = atomic_read(&chip->count);

//    dprintk(2, "%s - count %d (+%u), period %d, frame %lu\n", __FUNCTION__,
//          count, new, count & (runtime->periods-1),
//          runtime->period_size * (count & (runtime->periods-1)));
      return runtime->period_size * (count & (runtime->periods-1));
}

/*
 * page callback (needed for mmap)
 */
static struct page *snd_cx88_page(struct snd_pcm_substream *substream,
                        unsigned long offset)
{
      void *pageptr = substream->runtime->dma_area + offset;
      return vmalloc_to_page(pageptr);
}

/*
 * operators
 */
static struct snd_pcm_ops snd_cx88_pcm_ops = {
      .open = snd_cx88_pcm_open,
      .close = snd_cx88_close,
      .ioctl = snd_pcm_lib_ioctl,
      .hw_params = snd_cx88_hw_params,
      .hw_free = snd_cx88_hw_free,
      .prepare = snd_cx88_prepare,
      .trigger = snd_cx88_card_trigger,
      .pointer = snd_cx88_pointer,
      .page = snd_cx88_page,
};

/*
 * create a PCM device
 */
static int __devinit snd_cx88_pcm(snd_cx88_card_t *chip, int device, char *name)
{
      int err;
      struct snd_pcm *pcm;

      err = snd_pcm_new(chip->card, name, device, 0, 1, &pcm);
      if (err < 0)
            return err;
      pcm->private_data = chip;
      strcpy(pcm->name, name);
      snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_cx88_pcm_ops);

      return 0;
}

/****************************************************************************
                        CONTROL INTERFACE
 ****************************************************************************/
static int snd_cx88_volume_info(struct snd_kcontrol *kcontrol,
                        struct snd_ctl_elem_info *info)
{
      info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
      info->count = 2;
      info->value.integer.min = 0;
      info->value.integer.max = 0x3f;

      return 0;
}

static int snd_cx88_volume_get(struct snd_kcontrol *kcontrol,
                         struct snd_ctl_elem_value *value)
{
      snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
      struct cx88_core *core=chip->core;
      int vol = 0x3f - (cx_read(AUD_VOL_CTL) & 0x3f),
          bal = cx_read(AUD_BAL_CTL);

      value->value.integer.value[(bal & 0x40) ? 0 : 1] = vol;
      vol -= (bal & 0x3f);
      value->value.integer.value[(bal & 0x40) ? 1 : 0] = vol < 0 ? 0 : vol;

      return 0;
}

/* OK - TODO: test it */
static int snd_cx88_volume_put(struct snd_kcontrol *kcontrol,
                         struct snd_ctl_elem_value *value)
{
      snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
      struct cx88_core *core=chip->core;
      int v, b;
      int changed = 0;
      u32 old;

      b = value->value.integer.value[1] - value->value.integer.value[0];
      if (b < 0) {
          v = 0x3f - value->value.integer.value[0];
          b = (-b) | 0x40;
      } else {
          v = 0x3f - value->value.integer.value[1];
      }
      /* Do we really know this will always be called with IRQs on? */
      spin_lock_irq(&chip->reg_lock);
      old = cx_read(AUD_VOL_CTL);
      if (v != (old & 0x3f)) {
          cx_write(AUD_VOL_CTL, (old & ~0x3f) | v);
          changed = 1;
      }
      if (cx_read(AUD_BAL_CTL) != b) {
          cx_write(AUD_BAL_CTL, b);
          changed = 1;
      }
      spin_unlock_irq(&chip->reg_lock);

      return changed;
}

static const DECLARE_TLV_DB_SCALE(snd_cx88_db_scale, -6300, 100, 0);

static struct snd_kcontrol_new snd_cx88_volume = {
      .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
      .access = SNDRV_CTL_ELEM_ACCESS_READWRITE |
              SNDRV_CTL_ELEM_ACCESS_TLV_READ,
      .name = "Playback Volume",
      .info = snd_cx88_volume_info,
      .get = snd_cx88_volume_get,
      .put = snd_cx88_volume_put,
      .tlv.p = snd_cx88_db_scale,
};

static int snd_cx88_switch_get(struct snd_kcontrol *kcontrol,
                         struct snd_ctl_elem_value *value)
{
      snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
      struct cx88_core *core = chip->core;
      u32 bit = kcontrol->private_value;

      value->value.integer.value[0] = !(cx_read(AUD_VOL_CTL) & bit);
      return 0;
}

static int snd_cx88_switch_put(struct snd_kcontrol *kcontrol,
                               struct snd_ctl_elem_value *value)
{
      snd_cx88_card_t *chip = snd_kcontrol_chip(kcontrol);
      struct cx88_core *core = chip->core;
      u32 bit = kcontrol->private_value;
      int ret = 0;
      u32 vol;

      spin_lock_irq(&chip->reg_lock);
      vol = cx_read(AUD_VOL_CTL);
      if (value->value.integer.value[0] != !(vol & bit)) {
            vol ^= bit;
            cx_write(AUD_VOL_CTL, vol);
            ret = 1;
      }
      spin_unlock_irq(&chip->reg_lock);
      return ret;
}

static struct snd_kcontrol_new snd_cx88_dac_switch = {
      .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
      .name = "Playback Switch",
      .info = snd_ctl_boolean_mono_info,
      .get = snd_cx88_switch_get,
      .put = snd_cx88_switch_put,
      .private_value = (1<<8),
};

static struct snd_kcontrol_new snd_cx88_source_switch = {
      .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
      .name = "Capture Switch",
      .info = snd_ctl_boolean_mono_info,
      .get = snd_cx88_switch_get,
      .put = snd_cx88_switch_put,
      .private_value = (1<<6),
};

/****************************************************************************
                  Basic Flow for Sound Devices
 ****************************************************************************/

/*
 * PCI ID Table - 14f1:8801 and 14f1:8811 means function 1: Audio
 * Only boards with eeprom and byte 1 at eeprom=1 have it
 */

static struct pci_device_id cx88_audio_pci_tbl[] __devinitdata = {
      {0x14f1,0x8801,PCI_ANY_ID,PCI_ANY_ID,0,0,0},
      {0x14f1,0x8811,PCI_ANY_ID,PCI_ANY_ID,0,0,0},
      {0, }
};
MODULE_DEVICE_TABLE(pci, cx88_audio_pci_tbl);

/*
 * Chip-specific destructor
 */

static int snd_cx88_free(snd_cx88_card_t *chip)
{

      if (chip->irq >= 0){
            synchronize_irq(chip->irq);
            free_irq(chip->irq, chip);
      }

      cx88_core_put(chip->core,chip->pci);

      pci_disable_device(chip->pci);
      return 0;
}

/*
 * Component Destructor
 */
static void snd_cx88_dev_free(struct snd_card * card)
{
      snd_cx88_card_t *chip = card->private_data;

      snd_cx88_free(chip);
}


/*
 * Alsa Constructor - Component probe
 */

static int devno;
static int __devinit snd_cx88_create(struct snd_card *card,
                             struct pci_dev *pci,
                             snd_cx88_card_t **rchip)
{
      snd_cx88_card_t   *chip;
      struct cx88_core  *core;
      int               err;
      unsigned char     pci_lat;

      *rchip = NULL;

      err = pci_enable_device(pci);
      if (err < 0)
            return err;

      pci_set_master(pci);

      chip = (snd_cx88_card_t *) card->private_data;

      core = cx88_core_get(pci);
      if (NULL == core) {
            err = -EINVAL;
            kfree (chip);
            return err;
      }

      if (!pci_dma_supported(pci,DMA_32BIT_MASK)) {
            dprintk(0, "%s/1: Oops: no 32bit PCI DMA ???\n",core->name);
            err = -EIO;
            cx88_core_put(core,pci);
            return err;
      }


      /* pci init */
      chip->card = card;
      chip->pci = pci;
      chip->irq = -1;
      spin_lock_init(&chip->reg_lock);

      chip->core = core;

      /* get irq */
      err = request_irq(chip->pci->irq, cx8801_irq,
                    IRQF_SHARED | IRQF_DISABLED, chip->core->name, chip);
      if (err < 0) {
            dprintk(0, "%s: can't get IRQ %d\n",
                   chip->core->name, chip->pci->irq);
            return err;
      }

      /* print pci info */
      pci_read_config_byte(pci, PCI_LATENCY_TIMER, &pci_lat);

      dprintk(1,"ALSA %s/%i: found at %s, rev: %d, irq: %d, "
             "latency: %d, mmio: 0x%llx\n", core->name, devno,
             pci_name(pci), pci->revision, pci->irq,
             pci_lat, (unsigned long long)pci_resource_start(pci,0));

      chip->irq = pci->irq;
      synchronize_irq(chip->irq);

      snd_card_set_dev(card, &pci->dev);

      *rchip = chip;

      return 0;
}

static int __devinit cx88_audio_initdev(struct pci_dev *pci,
                            const struct pci_device_id *pci_id)
{
      struct snd_card  *card;
      snd_cx88_card_t  *chip;
      int              err;

      if (devno >= SNDRV_CARDS)
            return (-ENODEV);

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

      card = snd_card_new(index[devno], id[devno], THIS_MODULE, sizeof(snd_cx88_card_t));
      if (!card)
            return (-ENOMEM);

      card->private_free = snd_cx88_dev_free;

      err = snd_cx88_create(card, pci, &chip);
      if (err < 0)
            return (err);

      err = snd_cx88_pcm(chip, 0, "CX88 Digital");
      if (err < 0)
            goto error;

      err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_volume, chip));
      if (err < 0)
            goto error;
      err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_dac_switch, chip));
      if (err < 0)
            goto error;
      err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_source_switch, chip));
      if (err < 0)
            goto error;

      strcpy (card->driver, "CX88x");
      sprintf(card->shortname, "Conexant CX%x", pci->device);
      sprintf(card->longname, "%s at %#llx",
            card->shortname,(unsigned long long)pci_resource_start(pci, 0));
      strcpy (card->mixername, "CX88");

      dprintk (0, "%s/%i: ALSA support for cx2388x boards\n",
             card->driver,devno);

      err = snd_card_register(card);
      if (err < 0)
            goto error;
      pci_set_drvdata(pci,card);

      devno++;
      return 0;

error:
      snd_card_free(card);
      return err;
}
/*
 * ALSA destructor
 */
static void __devexit cx88_audio_finidev(struct pci_dev *pci)
{
      struct cx88_audio_dev *card = pci_get_drvdata(pci);

      snd_card_free((void *)card);

      pci_set_drvdata(pci, NULL);

      devno--;
}

/*
 * PCI driver definition
 */

static struct pci_driver cx88_audio_pci_driver = {
      .name     = "cx88_audio",
      .id_table = cx88_audio_pci_tbl,
      .probe    = cx88_audio_initdev,
      .remove   = cx88_audio_finidev,
};

/****************************************************************************
                        LINUX MODULE INIT
 ****************************************************************************/

/*
 * module init
 */
static int cx88_audio_init(void)
{
      printk(KERN_INFO "cx2388x alsa driver version %d.%d.%d loaded\n",
             (CX88_VERSION_CODE >> 16) & 0xff,
             (CX88_VERSION_CODE >>  8) & 0xff,
             CX88_VERSION_CODE & 0xff);
#ifdef SNAPSHOT
      printk(KERN_INFO "cx2388x: snapshot date %04d-%02d-%02d\n",
             SNAPSHOT/10000, (SNAPSHOT/100)%100, SNAPSHOT%100);
#endif
      return pci_register_driver(&cx88_audio_pci_driver);
}

/*
 * module remove
 */
static void cx88_audio_fini(void)
{

      pci_unregister_driver(&cx88_audio_pci_driver);
}

module_init(cx88_audio_init);
module_exit(cx88_audio_fini);

/* ----------------------------------------------------------- */
/*
 * Local variables:
 * c-basic-offset: 8
 * End:
 */

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