IRQ: Maintain regs pointer globally rather than passing to IRQ handlers

[mirror_ubuntu-artful-kernel.git] / drivers / media / video / cx88 / cx88-alsa.c

/*
 *
 *  Support for audio capture
 *  PCI function #1 of the cx2388x.
 *
 *    (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@suse.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 <asm/delay.h>
#include <sound/driver.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/control.h>
#include <sound/initval.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
 ****************************************************************************/

/* These can be replaced after done */
#define MIXER_ADDR_LAST MAX_CX88_INPUT

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

        /* pci i/o */
        struct pci_dev             *pci;
        unsigned char              pci_rev,pci_lat;

        /* audio controls */
        int                        irq;

        struct snd_card            *card;

        spinlock_t                 reg_lock;

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

        struct videobuf_dmabuf dma_risc;

        int                        mixer_volume[MIXER_ADDR_LAST+1][2];
        int                        capture_source[MIXER_ADDR_LAST+1][2];

        long int read_count;
        long int read_offset;

        struct cx88_buffer   *buf;

        long opened;
        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};
static struct snd_card *snd_cx88_cards[SNDRV_CARDS];

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];


        dprintk(1, "Starting audio DMA for %i bytes/line and %i (%i) lines at address %08x\n",buf->bpl, chip->num_periods, audio_ch->fifo_size / buf->bpl, audio_ch->fifo_start);

        /* setup fifo + format - out channel */
        cx88_sram_channel_setup(chip->core, &cx88_sram_channels[SRAM_CH25],
                                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);

        dprintk(1,"Enabling IRQ, setting mask from 0x%x to 0x%x\n",chip->core->pci_irqmask,(chip->core->pci_irqmask | 0x02));
        /* enable irqs */
        cx_set(MO_PCI_INTMSK, chip->core->pci_irqmask | 0x02);


        /* Enables corresponding bits at AUD_INT_STAT */
        cx_write(MO_AUD_INTMSK,
                        (1<<16)|
                        (1<<12)|
                        (1<<4)|
                        (1<<0)
                        );

        /* 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, &cx88_sram_channels[SRAM_CH25]);

        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, 0x02);
        cx_clear(MO_AUD_INTMSK,
                        (1<<16)|
                        (1<<12)|
                        (1<<4)|
                        (1<<0)
                        );

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

        return 0;
}

#define MAX_IRQ_LOOP 10

/*
 * 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;
        u32 count;

        status = cx_read(MO_AUD_INTSTAT);
        mask   = cx_read(MO_AUD_INTMSK);
        if (0 == (status & mask)) {
                spin_unlock(&chip->reg_lock);
                return;
        }
        cx_write(MO_AUD_INTSTAT, status);
        if (debug > 1  ||  (status & mask & ~0xff))
                cx88_print_irqbits(core->name, "irq aud",
                                   cx88_aud_irqs, status, mask);
        /* risc op code error */
        if (status & (1 << 16)) {
                printk(KERN_WARNING "%s/0: audio risc op code error\n",core->name);
                cx_clear(MO_AUD_DMACNTRL, 0x11);
                cx88_sram_channel_dump(core, &cx88_sram_channels[SRAM_CH25]);
        }

        /* risc1 downstream */
        if (status & 0x01) {
                spin_lock(&chip->reg_lock);
                count = cx_read(MO_AUDD_GPCNT);
                spin_unlock(&chip->reg_lock);
                if (chip->read_count == 0)
                        chip->read_count += chip->dma_size;
        }

        if  (chip->read_count >= chip->period_size) {
                dprintk(2, "Elapsing period\n");
                snd_pcm_period_elapsed(chip->substream);
        }

        dprintk(3,"Leaving audio IRQ handler...\n");

        /* 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 | 0x02);
                if (0 == status)
                        goto out;
                dprintk( 3, "cx8801_irq\n" );
                dprintk( 3, "    loop: %d/%d\n", loop, MAX_IRQ_LOOP );
                dprintk( 3, "    status: %d\n", status );
                handled = 1;
                cx_write(MO_PCI_INTSTAT, status);

                if (status & 0x02)
                {
                        dprintk( 2, "    ALSA IRQ handling\n" );
                        cx8801_aud_irq(chip);
                }
        };

        if (MAX_IRQ_LOOP == loop) {
                dprintk( 0, "clearing mask\n" );
                dprintk(1,"%s/0: irq loop -- clearing mask\n",
                       core->name);
                cx_clear(MO_PCI_INTMSK,0x02);
        }

 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_size = 0;

       return 0;
}

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

/*
 * Digital hardware definition
 */
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 = 1,
        .channels_max = 2,
        .buffer_bytes_max = (2*2048),
        .period_bytes_min = 2048,
        .period_bytes_max = 2048,
        .periods_min = 2,
        .periods_max = 2,
};

/*
 * audio pcm capture runtime free
 */
static void snd_card_cx88_runtime_free(struct snd_pcm_runtime *runtime)
{
}
/*
 * 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;

        if (test_and_set_bit(0, &chip->opened))
                return -EBUSY;

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

        chip->substream = substream;

        chip->read_count = 0;
        chip->read_offset = 0;

        runtime->private_free = snd_card_cx88_runtime_free;
        runtime->hw = snd_cx88_digital_hw;

        return 0;
_error:
        dprintk(1,"Error opening PCM!\n");
        clear_bit(0, &chip->opened);
        smp_mb__after_clear_bit();
        return err;
}

/*
 * audio close callback
 */
static int snd_cx88_close(struct snd_pcm_substream *substream)
{
        snd_cx88_card_t *chip = snd_pcm_substream_chip(substream);

        clear_bit(0, &chip->opened);
        smp_mb__after_clear_bit();

        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 cx88_buffer *buf;

        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);

        dprintk(1,"Setting buffer\n");

        buf = kmalloc(sizeof(*buf),GFP_KERNEL);
        if (NULL == buf)
                return -ENOMEM;
        memset(buf,0,sizeof(*buf));


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

        videobuf_dma_init(&buf->vb.dma);
        videobuf_dma_init_kernel(&buf->vb.dma,PCI_DMA_FROMDEVICE,
                        (PAGE_ALIGN(buf->vb.size) >> PAGE_SHIFT));

        videobuf_pci_dma_map(chip->pci,&buf->vb.dma);


        cx88_risc_databuffer(chip->pci, &buf->risc,
                        buf->vb.dma.sglist,
                        buf->vb.width, buf->vb.height);

        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 = STATE_PREPARED;

        buf->bpl = chip->period_size;
        chip->buf = buf;
        chip->dma_risc = buf->vb.dma;

        dprintk(1,"Buffer ready at %u\n",chip->dma_risc.nr_pages);
        substream->runtime->dma_area = chip->dma_risc.vmalloc;
        return 0;
}

/*
 * 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;

        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;

        if (chip->read_count) {
                chip->read_count -= snd_pcm_lib_period_bytes(substream);
                chip->read_offset += snd_pcm_lib_period_bytes(substream);
                if (chip->read_offset == chip->dma_size)
                        chip->read_offset = 0;
        }

        dprintk(2, "Pointer time, will return %li, read %li\n",chip->read_offset,chip->read_count);
        return bytes_to_frames(runtime, chip->read_offset);

}

/*
 * 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,
};

/*
 * 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_capture_volume_info(struct snd_kcontrol *kcontrol,
                                        struct snd_ctl_elem_info *info)
{
        info->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
        info->count = 1;
        info->value.integer.min = 0;
        info->value.integer.max = 0x3f;

        return 0;
}

/* OK - TODO: test it */
static int snd_cx88_capture_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;

        value->value.integer.value[0] = 0x3f - (cx_read(AUD_VOL_CTL) & 0x3f);

        return 0;
}

/* OK - TODO: test it */
static int snd_cx88_capture_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;
        u32 old_control;

        spin_lock_irq(&chip->reg_lock);
        old_control = 0x3f - (cx_read(AUD_VOL_CTL) & 0x3f);
        v = 0x3f - (value->value.integer.value[0] & 0x3f);
        cx_andor(AUD_VOL_CTL, 0x3f, v);
        spin_unlock_irq(&chip->reg_lock);

        return v != old_control;
}

static struct snd_kcontrol_new snd_cx88_capture_volume = {
        .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
        .name = "Capture Volume",
        .info = snd_cx88_capture_volume_info,
        .get = snd_cx88_capture_volume_get,
        .put = snd_cx88_capture_volume_put,
};


/****************************************************************************
                        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;

        *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,0xffffffff)) {
                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_CLASS_REVISION, &chip->pci_rev);
        pci_read_config_byte(pci, PCI_LATENCY_TIMER,  &chip->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), chip->pci_rev, pci->irq,
               chip->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) {
                snd_card_free(card);
                return (err);
        }

        err = snd_ctl_add(card, snd_ctl_new1(&snd_cx88_capture_volume, chip));
        if (err < 0) {
                snd_card_free(card);
                return (err);
        }

        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) {
                snd_card_free(card);
                return (err);
        }
        snd_cx88_cards[devno] = card;

        pci_set_drvdata(pci,card);

        devno++;
        return 0;
}
/*
 * 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:
 */