mixart.c

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/*
 * Driver for Digigram miXart soundcards
 *
 * main file with alsa callbacks
 *
 * Copyright (c) 2003 by Digigram <[email protected]>
 *
 *   This program is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation; either version 2 of the License, or
 *   (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with this program; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
 */


#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/slab.h>

#include <sound/core.h>
#include <sound/initval.h>
#include <sound/info.h>
#include <sound/control.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include "mixart.h"
#include "mixart_hwdep.h"
#include "mixart_core.h"
#include "mixart_mixer.h"

#define CARD_NAME "miXart"

MODULE_AUTHOR("Digigram <[email protected]>");
MODULE_DESCRIPTION("Digigram " CARD_NAME);
MODULE_LICENSE("GPL");
MODULE_SUPPORTED_DEVICE("{{Digigram," CARD_NAME "}}");

static int index[SNDRV_CARDS] = SNDRV_DEFAULT_IDX;             /* Index 0-MAX */
static char *id[SNDRV_CARDS] = SNDRV_DEFAULT_STR;              /* ID for this card */
static bool enable[SNDRV_CARDS] = SNDRV_DEFAULT_ENABLE_PNP;     /* Enable this card */

module_param_array(index, int, NULL, 0444);
MODULE_PARM_DESC(index, "Index value for Digigram " CARD_NAME " soundcard.");
module_param_array(id, charp, NULL, 0444);
MODULE_PARM_DESC(id, "ID string for Digigram " CARD_NAME " soundcard.");
module_param_array(enable, bool, NULL, 0444);
MODULE_PARM_DESC(enable, "Enable Digigram " CARD_NAME " soundcard.");

/*
 */

static DEFINE_PCI_DEVICE_TABLE(snd_mixart_ids) = {
    { PCI_VDEVICE(MOTOROLA, 0x0003), 0, }, /* MC8240 */
    { 0, }
};

MODULE_DEVICE_TABLE(pci, snd_mixart_ids);


static int mixart_set_pipe_state(struct mixart_mgr *mgr,
                 struct mixart_pipe *pipe, int start)
{
    struct mixart_group_state_req group_state;
    struct mixart_group_state_resp group_state_resp;
    struct mixart_msg request;
    int err;
    u32 system_msg_uid;

    switch(pipe->status) {
    case PIPE_RUNNING:
    case PIPE_CLOCK_SET:
        if(start) return 0; /* already started */
        break;
    case PIPE_STOPPED:
        if(!start) return 0; /* already stopped */
        break;
    default:
        snd_printk(KERN_ERR "error mixart_set_pipe_state called with wrong pipe->status!\n");
        return -EINVAL;      /* function called with wrong pipe status */
    }

    system_msg_uid = 0x12345678; /* the event ! (take care: the MSB and two LSB's have to be 0) */

    /* wait on the last MSG_SYSTEM_SEND_SYNCHRO_CMD command to be really finished */

    request.message_id = MSG_SYSTEM_WAIT_SYNCHRO_CMD;
    request.uid = (struct mixart_uid){0,0};
    request.data = &system_msg_uid;
    request.size = sizeof(system_msg_uid);

    err = snd_mixart_send_msg_wait_notif(mgr, &request, system_msg_uid);
    if(err) {
        snd_printk(KERN_ERR "error : MSG_SYSTEM_WAIT_SYNCHRO_CMD was not notified !\n");
        return err;
    }

    /* start or stop the pipe (1 pipe) */

    memset(&group_state, 0, sizeof(group_state));
    group_state.pipe_count = 1;
    group_state.pipe_uid[0] = pipe->group_uid;

    if(start)
        request.message_id = MSG_STREAM_START_STREAM_GRP_PACKET;
    else
        request.message_id = MSG_STREAM_STOP_STREAM_GRP_PACKET;

    request.uid = pipe->group_uid; /*(struct mixart_uid){0,0};*/
    request.data = &group_state;
    request.size = sizeof(group_state);

    err = snd_mixart_send_msg(mgr, &request, sizeof(group_state_resp), &group_state_resp);
    if (err < 0 || group_state_resp.txx_status != 0) {
        snd_printk(KERN_ERR "error MSG_STREAM_ST***_STREAM_GRP_PACKET err=%x stat=%x !\n", err, group_state_resp.txx_status);
        return -EINVAL;
    }

    if(start) {
        u32 stat;

        group_state.pipe_count = 0; /* in case of start same command once again with pipe_count=0 */

        err = snd_mixart_send_msg(mgr, &request, sizeof(group_state_resp), &group_state_resp);
        if (err < 0 || group_state_resp.txx_status != 0) {
            snd_printk(KERN_ERR "error MSG_STREAM_START_STREAM_GRP_PACKET err=%x stat=%x !\n", err, group_state_resp.txx_status);
            return -EINVAL;
        }

        /* in case of start send a synchro top */

        request.message_id = MSG_SYSTEM_SEND_SYNCHRO_CMD;
        request.uid = (struct mixart_uid){0,0};
        request.data = NULL;
        request.size = 0;

        err = snd_mixart_send_msg(mgr, &request, sizeof(stat), &stat);
        if (err < 0 || stat != 0) {
            snd_printk(KERN_ERR "error MSG_SYSTEM_SEND_SYNCHRO_CMD err=%x stat=%x !\n", err, stat);
            return -EINVAL;
        }

        pipe->status = PIPE_RUNNING;
    }
    else /* !start */
        pipe->status = PIPE_STOPPED;

    return 0;
}


static int mixart_set_clock(struct mixart_mgr *mgr,
                struct mixart_pipe *pipe, unsigned int rate)
{
    struct mixart_msg request;
    struct mixart_clock_properties clock_properties;
    struct mixart_clock_properties_resp clock_prop_resp;
    int err;

    switch(pipe->status) {
    case PIPE_CLOCK_SET:
        break;
    case PIPE_RUNNING:
        if(rate != 0)
            break;
    default:
        if(rate == 0)
            return 0; /* nothing to do */
        else {
            snd_printk(KERN_ERR "error mixart_set_clock(%d) called with wrong pipe->status !\n", rate);
            return -EINVAL;
        }
    }

    memset(&clock_properties, 0, sizeof(clock_properties));
    clock_properties.clock_generic_type = (rate != 0) ? CGT_INTERNAL_CLOCK : CGT_NO_CLOCK;
    clock_properties.clock_mode = CM_STANDALONE;
    clock_properties.frequency = rate;
    clock_properties.nb_callers = 1; /* only one entry in uid_caller ! */
    clock_properties.uid_caller[0] = pipe->group_uid;

    snd_printdd("mixart_set_clock to %d kHz\n", rate);

    request.message_id = MSG_CLOCK_SET_PROPERTIES;
    request.uid = mgr->uid_console_manager;
    request.data = &clock_properties;
    request.size = sizeof(clock_properties);

    err = snd_mixart_send_msg(mgr, &request, sizeof(clock_prop_resp), &clock_prop_resp);
    if (err < 0 || clock_prop_resp.status != 0 || clock_prop_resp.clock_mode != CM_STANDALONE) {
        snd_printk(KERN_ERR "error MSG_CLOCK_SET_PROPERTIES err=%x stat=%x mod=%x !\n", err, clock_prop_resp.status, clock_prop_resp.clock_mode);
        return -EINVAL;
    }

    if(rate)  pipe->status = PIPE_CLOCK_SET;
    else      pipe->status = PIPE_RUNNING;

    return 0;
}


/*
 *  Allocate or reference output pipe for analog IOs (pcmp0/1)
 */
struct mixart_pipe *
snd_mixart_add_ref_pipe(struct snd_mixart *chip, int pcm_number, int capture,
            int monitoring)
{
    int stream_count;
    struct mixart_pipe *pipe;
    struct mixart_msg request;

    if(capture) {
        if (pcm_number == MIXART_PCM_ANALOG) {
            pipe = &(chip->pipe_in_ana);  /* analog inputs */
        } else {
            pipe = &(chip->pipe_in_dig); /* digital inputs */
        }
        request.message_id = MSG_STREAM_ADD_OUTPUT_GROUP;
        stream_count = MIXART_CAPTURE_STREAMS;
    } else {
        if (pcm_number == MIXART_PCM_ANALOG) {
            pipe = &(chip->pipe_out_ana);  /* analog outputs */
        } else {
            pipe = &(chip->pipe_out_dig);  /* digital outputs */
        }
        request.message_id = MSG_STREAM_ADD_INPUT_GROUP;
        stream_count = MIXART_PLAYBACK_STREAMS;
    }

    /* a new stream is opened and there are already all streams in use */
    if( (monitoring == 0) && (pipe->references >= stream_count) ) {
        return NULL;
    }

    /* pipe is not yet defined */
    if( pipe->status == PIPE_UNDEFINED ) {
        int err, i;
        struct {
            struct mixart_streaming_group_req sgroup_req;
            struct mixart_streaming_group sgroup_resp;
        } *buf;

        snd_printdd("add_ref_pipe audio chip(%d) pcm(%d)\n", chip->chip_idx, pcm_number);

        buf = kmalloc(sizeof(*buf), GFP_KERNEL);
        if (!buf)
            return NULL;

        request.uid = (struct mixart_uid){0,0};      /* should be StreamManagerUID, but zero is OK if there is only one ! */
        request.data = &buf->sgroup_req;
        request.size = sizeof(buf->sgroup_req);

        memset(&buf->sgroup_req, 0, sizeof(buf->sgroup_req));

        buf->sgroup_req.stream_count = stream_count;
        buf->sgroup_req.channel_count = 2;
        buf->sgroup_req.latency = 256;
        buf->sgroup_req.connector = pipe->uid_left_connector;  /* the left connector */

        for (i=0; i<stream_count; i++) {
            int j;
            struct mixart_flowinfo *flowinfo;
            struct mixart_bufferinfo *bufferinfo;
            
            /* we don't yet know the format, so config 16 bit pcm audio for instance */
            buf->sgroup_req.stream_info[i].size_max_byte_frame = 1024;
            buf->sgroup_req.stream_info[i].size_max_sample_frame = 256;
            buf->sgroup_req.stream_info[i].nb_bytes_max_per_sample = MIXART_FLOAT_P__4_0_TO_HEX; /* is 4.0f */

            /* find the right bufferinfo_array */
            j = (chip->chip_idx * MIXART_MAX_STREAM_PER_CARD) + (pcm_number * (MIXART_PLAYBACK_STREAMS + MIXART_CAPTURE_STREAMS)) + i;
            if(capture) j += MIXART_PLAYBACK_STREAMS; /* in the array capture is behind playback */

            buf->sgroup_req.flow_entry[i] = j;

            flowinfo = (struct mixart_flowinfo *)chip->mgr->flowinfo.area;
            flowinfo[j].bufferinfo_array_phy_address = (u32)chip->mgr->bufferinfo.addr + (j * sizeof(struct mixart_bufferinfo));
            flowinfo[j].bufferinfo_count = 1;               /* 1 will set the miXart to ring-buffer mode ! */

            bufferinfo = (struct mixart_bufferinfo *)chip->mgr->bufferinfo.area;
            bufferinfo[j].buffer_address = 0;               /* buffer is not yet allocated */
            bufferinfo[j].available_length = 0;             /* buffer is not yet allocated */

            /* construct the identifier of the stream buffer received in the interrupts ! */
            bufferinfo[j].buffer_id = (chip->chip_idx << MIXART_NOTIFY_CARD_OFFSET) + (pcm_number << MIXART_NOTIFY_PCM_OFFSET ) + i;
            if(capture) {
                bufferinfo[j].buffer_id |= MIXART_NOTIFY_CAPT_MASK;
            }
        }

        err = snd_mixart_send_msg(chip->mgr, &request, sizeof(buf->sgroup_resp), &buf->sgroup_resp);
        if((err < 0) || (buf->sgroup_resp.status != 0)) {
            snd_printk(KERN_ERR "error MSG_STREAM_ADD_**PUT_GROUP err=%x stat=%x !\n", err, buf->sgroup_resp.status);
            kfree(buf);
            return NULL;
        }

        pipe->group_uid = buf->sgroup_resp.group;     /* id of the pipe, as returned by embedded */
        pipe->stream_count = buf->sgroup_resp.stream_count;
        /* pipe->stream_uid[i] = buf->sgroup_resp.stream[i].stream_uid; */

        pipe->status = PIPE_STOPPED;
        kfree(buf);
    }

    if(monitoring)  pipe->monitoring = 1;
    else        pipe->references++;

    return pipe;
}


int snd_mixart_kill_ref_pipe(struct mixart_mgr *mgr,
                 struct mixart_pipe *pipe, int monitoring)
{
    int err = 0;

    if(pipe->status == PIPE_UNDEFINED)
        return 0;

    if(monitoring)
        pipe->monitoring = 0;
    else
        pipe->references--;

    if((pipe->references <= 0) && (pipe->monitoring == 0)) {

        struct mixart_msg request;
        struct mixart_delete_group_resp delete_resp;

        /* release the clock */
        err = mixart_set_clock( mgr, pipe, 0);
        if( err < 0 ) {
            snd_printk(KERN_ERR "mixart_set_clock(0) return error!\n");
        }

        /* stop the pipe */
        err = mixart_set_pipe_state(mgr, pipe, 0);
        if( err < 0 ) {
            snd_printk(KERN_ERR "error stopping pipe!\n");
        }

        request.message_id = MSG_STREAM_DELETE_GROUP;
        request.uid = (struct mixart_uid){0,0};
        request.data = &pipe->group_uid;            /* the streaming group ! */
        request.size = sizeof(pipe->group_uid);

        /* delete the pipe */
        err = snd_mixart_send_msg(mgr, &request, sizeof(delete_resp), &delete_resp);
        if ((err < 0) || (delete_resp.status != 0)) {
            snd_printk(KERN_ERR "error MSG_STREAM_DELETE_GROUP err(%x), status(%x)\n", err, delete_resp.status);
        }

        pipe->group_uid = (struct mixart_uid){0,0};
        pipe->stream_count = 0;
        pipe->status = PIPE_UNDEFINED;
    }

    return err;
}

static int mixart_set_stream_state(struct mixart_stream *stream, int start)
{
    struct snd_mixart *chip;
    struct mixart_stream_state_req stream_state_req;
    struct mixart_msg request;

    if(!stream->substream)
        return -EINVAL;

    memset(&stream_state_req, 0, sizeof(stream_state_req));
    stream_state_req.stream_count = 1;
    stream_state_req.stream_info.stream_desc.uid_pipe = stream->pipe->group_uid;
    stream_state_req.stream_info.stream_desc.stream_idx = stream->substream->number;

    if (stream->substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
        request.message_id = start ? MSG_STREAM_START_INPUT_STAGE_PACKET : MSG_STREAM_STOP_INPUT_STAGE_PACKET;
    else
        request.message_id = start ? MSG_STREAM_START_OUTPUT_STAGE_PACKET : MSG_STREAM_STOP_OUTPUT_STAGE_PACKET;

    request.uid = (struct mixart_uid){0,0};
    request.data = &stream_state_req;
    request.size = sizeof(stream_state_req);

    stream->abs_period_elapsed = 0;            /* reset stream pos      */
    stream->buf_periods = 0;
    stream->buf_period_frag = 0;

    chip = snd_pcm_substream_chip(stream->substream);

    return snd_mixart_send_msg_nonblock(chip->mgr, &request);
}

/*
 *  Trigger callback
 */

static int snd_mixart_trigger(struct snd_pcm_substream *subs, int cmd)
{
    struct mixart_stream *stream = subs->runtime->private_data;

    switch (cmd) {
    case SNDRV_PCM_TRIGGER_START:

        snd_printdd("SNDRV_PCM_TRIGGER_START\n");

        /* START_STREAM */
        if( mixart_set_stream_state(stream, 1) )
            return -EINVAL;

        stream->status = MIXART_STREAM_STATUS_RUNNING;

        break;
    case SNDRV_PCM_TRIGGER_STOP:

        /* STOP_STREAM */
        if( mixart_set_stream_state(stream, 0) )
            return -EINVAL;

        stream->status = MIXART_STREAM_STATUS_OPEN;

        snd_printdd("SNDRV_PCM_TRIGGER_STOP\n");

        break;

    case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
        /* TODO */
        stream->status = MIXART_STREAM_STATUS_PAUSE;
        snd_printdd("SNDRV_PCM_PAUSE_PUSH\n");
        break;
    case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
        /* TODO */
        stream->status = MIXART_STREAM_STATUS_RUNNING;
        snd_printdd("SNDRV_PCM_PAUSE_RELEASE\n");
        break;
    default:
        return -EINVAL;
    }
    return 0;
}

static int mixart_sync_nonblock_events(struct mixart_mgr *mgr)
{
    unsigned long timeout = jiffies + HZ;
    while (atomic_read(&mgr->msg_processed) > 0) {
        if (time_after(jiffies, timeout)) {
            snd_printk(KERN_ERR "mixart: cannot process nonblock events!\n");
            return -EBUSY;
        }
        schedule_timeout_uninterruptible(1);
    }
    return 0;
}

/*
 *  prepare callback for all pcms
 */
static int snd_mixart_prepare(struct snd_pcm_substream *subs)
{
    struct snd_mixart *chip = snd_pcm_substream_chip(subs);
    struct mixart_stream *stream = subs->runtime->private_data;

    /* TODO de façon non bloquante, réappliquer les hw_params (rate, bits, codec) */

    snd_printdd("snd_mixart_prepare\n");

    mixart_sync_nonblock_events(chip->mgr);

    /* only the first stream can choose the sample rate */
    /* the further opened streams will be limited to its frequency (see open) */
    if(chip->mgr->ref_count_rate == 1)
        chip->mgr->sample_rate = subs->runtime->rate;

    /* set the clock only once (first stream) on the same pipe */
    if(stream->pipe->references == 1) {
        if( mixart_set_clock(chip->mgr, stream->pipe, subs->runtime->rate) )
            return -EINVAL;
    }

    return 0;
}


static int mixart_set_format(struct mixart_stream *stream, snd_pcm_format_t format)
{
    int err;
    struct snd_mixart *chip;
    struct mixart_msg request;
    struct mixart_stream_param_desc stream_param;
    struct mixart_return_uid resp;

    chip = snd_pcm_substream_chip(stream->substream);

    memset(&stream_param, 0, sizeof(stream_param));

    stream_param.coding_type = CT_LINEAR;
    stream_param.number_of_channel = stream->channels;

    stream_param.sampling_freq = chip->mgr->sample_rate;
    if(stream_param.sampling_freq == 0)
        stream_param.sampling_freq = 44100; /* if frequency not yet defined, use some default */

    switch(format){
    case SNDRV_PCM_FORMAT_U8:
        stream_param.sample_type = ST_INTEGER_8;
        stream_param.sample_size = 8;
        break;
    case SNDRV_PCM_FORMAT_S16_LE:
        stream_param.sample_type = ST_INTEGER_16LE;
        stream_param.sample_size = 16;
        break;
    case SNDRV_PCM_FORMAT_S16_BE:
        stream_param.sample_type = ST_INTEGER_16BE;
        stream_param.sample_size = 16;
        break;
    case SNDRV_PCM_FORMAT_S24_3LE:
        stream_param.sample_type = ST_INTEGER_24LE;
        stream_param.sample_size = 24;
        break;
    case SNDRV_PCM_FORMAT_S24_3BE:
        stream_param.sample_type = ST_INTEGER_24BE;
        stream_param.sample_size = 24;
        break;
    case SNDRV_PCM_FORMAT_FLOAT_LE:
        stream_param.sample_type = ST_FLOATING_POINT_32LE;
        stream_param.sample_size = 32;
        break;
    case  SNDRV_PCM_FORMAT_FLOAT_BE:
        stream_param.sample_type = ST_FLOATING_POINT_32BE;
        stream_param.sample_size = 32;
        break;
    default:
        snd_printk(KERN_ERR "error mixart_set_format() : unknown format\n");
        return -EINVAL;
    }

    snd_printdd("set SNDRV_PCM_FORMAT sample_type(%d) sample_size(%d) freq(%d) channels(%d)\n",
           stream_param.sample_type, stream_param.sample_size, stream_param.sampling_freq, stream->channels);

    /* TODO: what else to configure ? */
    /* stream_param.samples_per_frame = 2; */
    /* stream_param.bytes_per_frame = 4; */
    /* stream_param.bytes_per_sample = 2; */

    stream_param.pipe_count = 1;      /* set to 1 */
    stream_param.stream_count = 1;    /* set to 1 */
    stream_param.stream_desc[0].uid_pipe = stream->pipe->group_uid;
    stream_param.stream_desc[0].stream_idx = stream->substream->number;

    request.message_id = MSG_STREAM_SET_INPUT_STAGE_PARAM;
    request.uid = (struct mixart_uid){0,0};
    request.data = &stream_param;
    request.size = sizeof(stream_param);

    err = snd_mixart_send_msg(chip->mgr, &request, sizeof(resp), &resp);
    if((err < 0) || resp.error_code) {
        snd_printk(KERN_ERR "MSG_STREAM_SET_INPUT_STAGE_PARAM err=%x; resp=%x\n", err, resp.error_code);
        return -EINVAL;
    }
    return 0;
}


/*
 *  HW_PARAMS callback for all pcms
 */
static int snd_mixart_hw_params(struct snd_pcm_substream *subs,
                                struct snd_pcm_hw_params *hw)
{
    struct snd_mixart *chip = snd_pcm_substream_chip(subs);
    struct mixart_mgr *mgr = chip->mgr;
    struct mixart_stream *stream = subs->runtime->private_data;
    snd_pcm_format_t format;
    int err;
    int channels;

    /* set up channels */
    channels = params_channels(hw);

    /*  set up format for the stream */
    format = params_format(hw);

    mutex_lock(&mgr->setup_mutex);

    /* update the stream levels */
    if( stream->pcm_number <= MIXART_PCM_DIGITAL ) {
        int is_aes = stream->pcm_number > MIXART_PCM_ANALOG;
        if( subs->stream == SNDRV_PCM_STREAM_PLAYBACK )
            mixart_update_playback_stream_level(chip, is_aes, subs->number);
        else
            mixart_update_capture_stream_level( chip, is_aes);
    }

    stream->channels = channels;

    /* set the format to the board */
    err = mixart_set_format(stream, format);
    if(err < 0) {
        mutex_unlock(&mgr->setup_mutex);
        return err;
    }

    /* allocate buffer */
    err = snd_pcm_lib_malloc_pages(subs, params_buffer_bytes(hw));

    if (err > 0) {
        struct mixart_bufferinfo *bufferinfo;
        int i = (chip->chip_idx * MIXART_MAX_STREAM_PER_CARD) + (stream->pcm_number * (MIXART_PLAYBACK_STREAMS+MIXART_CAPTURE_STREAMS)) + subs->number;
        if( subs->stream == SNDRV_PCM_STREAM_CAPTURE ) {
            i += MIXART_PLAYBACK_STREAMS; /* in array capture is behind playback */
        }
        
        bufferinfo = (struct mixart_bufferinfo *)chip->mgr->bufferinfo.area;
        bufferinfo[i].buffer_address = subs->runtime->dma_addr;
        bufferinfo[i].available_length = subs->runtime->dma_bytes;
        /* bufferinfo[i].buffer_id  is already defined */

        snd_printdd("snd_mixart_hw_params(pcm %d) : dma_addr(%x) dma_bytes(%x) subs-number(%d)\n", i,
                bufferinfo[i].buffer_address,
                bufferinfo[i].available_length,
                subs->number);
    }
    mutex_unlock(&mgr->setup_mutex);

    return err;
}

static int snd_mixart_hw_free(struct snd_pcm_substream *subs)
{
    struct snd_mixart *chip = snd_pcm_substream_chip(subs);
    snd_pcm_lib_free_pages(subs);
    mixart_sync_nonblock_events(chip->mgr);
    return 0;
}



/*
 *  TODO CONFIGURATION SPACE for all pcms, mono pcm must update channels_max
 */
static struct snd_pcm_hardware snd_mixart_analog_caps =
{
    .info             = ( SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
                  SNDRV_PCM_INFO_MMAP_VALID |
                  SNDRV_PCM_INFO_PAUSE),
    .formats      = ( SNDRV_PCM_FMTBIT_U8 |
                  SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
                  SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |
                  SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE ),
    .rates            = SNDRV_PCM_RATE_CONTINUOUS | SNDRV_PCM_RATE_8000_48000,
    .rate_min         = 8000,
    .rate_max         = 48000,
    .channels_min     = 1,
    .channels_max     = 2,
    .buffer_bytes_max = (32*1024),
    .period_bytes_min = 256,                  /* 256 frames U8 mono*/
    .period_bytes_max = (16*1024),
    .periods_min      = 2,
    .periods_max      = (32*1024/256),
};

static struct snd_pcm_hardware snd_mixart_digital_caps =
{
    .info             = ( SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
                  SNDRV_PCM_INFO_MMAP_VALID |
                  SNDRV_PCM_INFO_PAUSE),
    .formats      = ( SNDRV_PCM_FMTBIT_U8 |
                  SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
                  SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |
                  SNDRV_PCM_FMTBIT_FLOAT_LE | SNDRV_PCM_FMTBIT_FLOAT_BE ),
    .rates            = SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000,
    .rate_min         = 32000,
    .rate_max         = 48000,
    .channels_min     = 1,
    .channels_max     = 2,
    .buffer_bytes_max = (32*1024),
    .period_bytes_min = 256,                  /* 256 frames U8 mono*/
    .period_bytes_max = (16*1024),
    .periods_min      = 2,
    .periods_max      = (32*1024/256),
};


static int snd_mixart_playback_open(struct snd_pcm_substream *subs)
{
    struct snd_mixart            *chip = snd_pcm_substream_chip(subs);
    struct mixart_mgr        *mgr = chip->mgr;
    struct snd_pcm_runtime *runtime = subs->runtime;
    struct snd_pcm *pcm = subs->pcm;
    struct mixart_stream     *stream;
    struct mixart_pipe       *pipe;
    int err = 0;
    int pcm_number;

    mutex_lock(&mgr->setup_mutex);

    if ( pcm == chip->pcm ) {
        pcm_number = MIXART_PCM_ANALOG;
        runtime->hw = snd_mixart_analog_caps;
    } else {
        snd_BUG_ON(pcm != chip->pcm_dig);
        pcm_number = MIXART_PCM_DIGITAL;
        runtime->hw = snd_mixart_digital_caps;
    }
    snd_printdd("snd_mixart_playback_open C%d/P%d/Sub%d\n", chip->chip_idx, pcm_number, subs->number);

    /* get stream info */
    stream = &(chip->playback_stream[pcm_number][subs->number]);

    if (stream->status != MIXART_STREAM_STATUS_FREE){
        /* streams in use */
        snd_printk(KERN_ERR "snd_mixart_playback_open C%d/P%d/Sub%d in use\n", chip->chip_idx, pcm_number, subs->number);
        err = -EBUSY;
        goto _exit_open;
    }

    /* get pipe pointer (out pipe) */
    pipe = snd_mixart_add_ref_pipe(chip, pcm_number, 0, 0);

    if (pipe == NULL) {
        err = -EINVAL;
        goto _exit_open;
    }

    /* start the pipe if necessary */
    err = mixart_set_pipe_state(chip->mgr, pipe, 1);
    if( err < 0 ) {
        snd_printk(KERN_ERR "error starting pipe!\n");
        snd_mixart_kill_ref_pipe(chip->mgr, pipe, 0);
        err = -EINVAL;
        goto _exit_open;
    }

    stream->pipe        = pipe;
    stream->pcm_number  = pcm_number;
    stream->status      = MIXART_STREAM_STATUS_OPEN;
    stream->substream   = subs;
    stream->channels    = 0; /* not configured yet */

    runtime->private_data = stream;

    snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32);
    snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 64);

    /* if a sample rate is already used, another stream cannot change */
    if(mgr->ref_count_rate++) {
        if(mgr->sample_rate) {
            runtime->hw.rate_min = runtime->hw.rate_max = mgr->sample_rate;
        }
    }

 _exit_open:
    mutex_unlock(&mgr->setup_mutex);

    return err;
}


static int snd_mixart_capture_open(struct snd_pcm_substream *subs)
{
    struct snd_mixart            *chip = snd_pcm_substream_chip(subs);
    struct mixart_mgr        *mgr = chip->mgr;
    struct snd_pcm_runtime *runtime = subs->runtime;
    struct snd_pcm *pcm = subs->pcm;
    struct mixart_stream     *stream;
    struct mixart_pipe       *pipe;
    int err = 0;
    int pcm_number;

    mutex_lock(&mgr->setup_mutex);

    if ( pcm == chip->pcm ) {
        pcm_number = MIXART_PCM_ANALOG;
        runtime->hw = snd_mixart_analog_caps;
    } else {
        snd_BUG_ON(pcm != chip->pcm_dig);
        pcm_number = MIXART_PCM_DIGITAL;
        runtime->hw = snd_mixart_digital_caps;
    }

    runtime->hw.channels_min = 2; /* for instance, no mono */

    snd_printdd("snd_mixart_capture_open C%d/P%d/Sub%d\n", chip->chip_idx, pcm_number, subs->number);

    /* get stream info */
    stream = &(chip->capture_stream[pcm_number]);

    if (stream->status != MIXART_STREAM_STATUS_FREE){
        /* streams in use */
        snd_printk(KERN_ERR "snd_mixart_capture_open C%d/P%d/Sub%d in use\n", chip->chip_idx, pcm_number, subs->number);
        err = -EBUSY;
        goto _exit_open;
    }

    /* get pipe pointer (in pipe) */
    pipe = snd_mixart_add_ref_pipe(chip, pcm_number, 1, 0);

    if (pipe == NULL) {
        err = -EINVAL;
        goto _exit_open;
    }

    /* start the pipe if necessary */
    err = mixart_set_pipe_state(chip->mgr, pipe, 1);
    if( err < 0 ) {
        snd_printk(KERN_ERR "error starting pipe!\n");
        snd_mixart_kill_ref_pipe(chip->mgr, pipe, 0);
        err = -EINVAL;
        goto _exit_open;
    }

    stream->pipe        = pipe;
    stream->pcm_number  = pcm_number;
    stream->status      = MIXART_STREAM_STATUS_OPEN;
    stream->substream   = subs;
    stream->channels    = 0; /* not configured yet */

    runtime->private_data = stream;

    snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 32);
    snd_pcm_hw_constraint_step(runtime, 0, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, 64);

    /* if a sample rate is already used, another stream cannot change */
    if(mgr->ref_count_rate++) {
        if(mgr->sample_rate) {
            runtime->hw.rate_min = runtime->hw.rate_max = mgr->sample_rate;
        }
    }

 _exit_open:
    mutex_unlock(&mgr->setup_mutex);

    return err;
}



static int snd_mixart_close(struct snd_pcm_substream *subs)
{
    struct snd_mixart *chip = snd_pcm_substream_chip(subs);
    struct mixart_mgr *mgr = chip->mgr;
    struct mixart_stream *stream = subs->runtime->private_data;

    mutex_lock(&mgr->setup_mutex);

    snd_printdd("snd_mixart_close C%d/P%d/Sub%d\n", chip->chip_idx, stream->pcm_number, subs->number);

    /* sample rate released */
    if(--mgr->ref_count_rate == 0) {
        mgr->sample_rate = 0;
    }

    /* delete pipe */
    if (snd_mixart_kill_ref_pipe(mgr, stream->pipe, 0 ) < 0) {

        snd_printk(KERN_ERR "error snd_mixart_kill_ref_pipe C%dP%d\n", chip->chip_idx, stream->pcm_number);
    }

    stream->pipe      = NULL;
    stream->status    = MIXART_STREAM_STATUS_FREE;
    stream->substream = NULL;

    mutex_unlock(&mgr->setup_mutex);
    return 0;
}


static snd_pcm_uframes_t snd_mixart_stream_pointer(struct snd_pcm_substream *subs)
{
    struct snd_pcm_runtime *runtime = subs->runtime;
    struct mixart_stream   *stream  = runtime->private_data;

    return (snd_pcm_uframes_t)((stream->buf_periods * runtime->period_size) + stream->buf_period_frag);
}



static struct snd_pcm_ops snd_mixart_playback_ops = {
    .open      = snd_mixart_playback_open,
    .close     = snd_mixart_close,
    .ioctl     = snd_pcm_lib_ioctl,
    .prepare   = snd_mixart_prepare,
    .hw_params = snd_mixart_hw_params,
    .hw_free   = snd_mixart_hw_free,
    .trigger   = snd_mixart_trigger,
    .pointer   = snd_mixart_stream_pointer,
};

static struct snd_pcm_ops snd_mixart_capture_ops = {
    .open      = snd_mixart_capture_open,
    .close     = snd_mixart_close,
    .ioctl     = snd_pcm_lib_ioctl,
    .prepare   = snd_mixart_prepare,
    .hw_params = snd_mixart_hw_params,
    .hw_free   = snd_mixart_hw_free,
    .trigger   = snd_mixart_trigger,
    .pointer   = snd_mixart_stream_pointer,
};

static void preallocate_buffers(struct snd_mixart *chip, struct snd_pcm *pcm)
{
#if 0
    struct snd_pcm_substream *subs;
    int stream;

    for (stream = 0; stream < 2; stream++) {
        int idx = 0;
        for (subs = pcm->streams[stream].substream; subs; subs = subs->next, idx++)
            /* set up the unique device id with the chip index */
            subs->dma_device.id = subs->pcm->device << 16 |
                subs->stream << 8 | (subs->number + 1) |
                (chip->chip_idx + 1) << 24;
    }
#endif
    snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
                          snd_dma_pci_data(chip->mgr->pci), 32*1024, 32*1024);
}

/*
 */
static int snd_mixart_pcm_analog(struct snd_mixart *chip)
{
    int err;
    struct snd_pcm *pcm;
    char name[32];

    sprintf(name, "miXart analog %d", chip->chip_idx);
    if ((err = snd_pcm_new(chip->card, name, MIXART_PCM_ANALOG,
                   MIXART_PLAYBACK_STREAMS,
                   MIXART_CAPTURE_STREAMS, &pcm)) < 0) {
        snd_printk(KERN_ERR "cannot create the analog pcm %d\n", chip->chip_idx);
        return err;
    }

    pcm->private_data = chip;

    snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_mixart_playback_ops);
    snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_mixart_capture_ops);

    pcm->info_flags = 0;
    strcpy(pcm->name, name);

    preallocate_buffers(chip, pcm);

    chip->pcm = pcm;
    return 0;
}


/*
 */
static int snd_mixart_pcm_digital(struct snd_mixart *chip)
{
    int err;
    struct snd_pcm *pcm;
    char name[32];

    sprintf(name, "miXart AES/EBU %d", chip->chip_idx);
    if ((err = snd_pcm_new(chip->card, name, MIXART_PCM_DIGITAL,
                   MIXART_PLAYBACK_STREAMS,
                   MIXART_CAPTURE_STREAMS, &pcm)) < 0) {
        snd_printk(KERN_ERR "cannot create the digital pcm %d\n", chip->chip_idx);
        return err;
    }

    pcm->private_data = chip;

    snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_mixart_playback_ops);
    snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &snd_mixart_capture_ops);

    pcm->info_flags = 0;
    strcpy(pcm->name, name);

    preallocate_buffers(chip, pcm);

    chip->pcm_dig = pcm;
    return 0;
}

static int snd_mixart_chip_free(struct snd_mixart *chip)
{
    kfree(chip);
    return 0;
}

static int snd_mixart_chip_dev_free(struct snd_device *device)
{
    struct snd_mixart *chip = device->device_data;
    return snd_mixart_chip_free(chip);
}


/*
 */
static int __devinit snd_mixart_create(struct mixart_mgr *mgr, struct snd_card *card, int idx)
{
    int err;
    struct snd_mixart *chip;
    static struct snd_device_ops ops = {
        .dev_free = snd_mixart_chip_dev_free,
    };

    chip = kzalloc(sizeof(*chip), GFP_KERNEL);
    if (! chip) {
        snd_printk(KERN_ERR "cannot allocate chip\n");
        return -ENOMEM;
    }

    chip->card = card;
    chip->chip_idx = idx;
    chip->mgr = mgr;

    if ((err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops)) < 0) {
        snd_mixart_chip_free(chip);
        return err;
    }

    mgr->chip[idx] = chip;
    snd_card_set_dev(card, &mgr->pci->dev);

    return 0;
}

int snd_mixart_create_pcm(struct snd_mixart* chip)
{
    int err;

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

    if(chip->mgr->board_type == MIXART_DAUGHTER_TYPE_AES) {

        err = snd_mixart_pcm_digital(chip);
        if (err < 0)
            return err;
    }
    return err;
}


/*
 * release all the cards assigned to a manager instance
 */
static int snd_mixart_free(struct mixart_mgr *mgr)
{
    unsigned int i;

    for (i = 0; i < mgr->num_cards; i++) {
        if (mgr->chip[i])
            snd_card_free(mgr->chip[i]->card);
    }

    /* stop mailbox */
    snd_mixart_exit_mailbox(mgr);

    /* release irq  */
    if (mgr->irq >= 0)
        free_irq(mgr->irq, mgr);

    /* reset board if some firmware was loaded */
    if(mgr->dsp_loaded) {
        snd_mixart_reset_board(mgr);
        snd_printdd("reset miXart !\n");
    }

    /* release the i/o ports */
    for (i = 0; i < 2; i++) {
        if (mgr->mem[i].virt)
            iounmap(mgr->mem[i].virt);
    }
    pci_release_regions(mgr->pci);

    /* free flowarray */
    if(mgr->flowinfo.area) {
        snd_dma_free_pages(&mgr->flowinfo);
        mgr->flowinfo.area = NULL;
    }
    /* free bufferarray */
    if(mgr->bufferinfo.area) {
        snd_dma_free_pages(&mgr->bufferinfo);
        mgr->bufferinfo.area = NULL;
    }

    pci_disable_device(mgr->pci);
    kfree(mgr);
    return 0;
}

/*
 * proc interface
 */

/*
  mixart_BA0 proc interface for BAR 0 - read callback
 */
static ssize_t snd_mixart_BA0_read(struct snd_info_entry *entry,
                   void *file_private_data,
                   struct file *file, char __user *buf,
                   size_t count, loff_t pos)
{
    struct mixart_mgr *mgr = entry->private_data;

    count = count & ~3; /* make sure the read size is a multiple of 4 bytes */
    if (copy_to_user_fromio(buf, MIXART_MEM(mgr, pos), count))
        return -EFAULT;
    return count;
}

/*
  mixart_BA1 proc interface for BAR 1 - read callback
 */
static ssize_t snd_mixart_BA1_read(struct snd_info_entry *entry,
                   void *file_private_data,
                   struct file *file, char __user *buf,
                   size_t count, loff_t pos)
{
    struct mixart_mgr *mgr = entry->private_data;

    count = count & ~3; /* make sure the read size is a multiple of 4 bytes */
    if (copy_to_user_fromio(buf, MIXART_REG(mgr, pos), count))
        return -EFAULT;
    return count;
}

static struct snd_info_entry_ops snd_mixart_proc_ops_BA0 = {
    .read   = snd_mixart_BA0_read,
};

static struct snd_info_entry_ops snd_mixart_proc_ops_BA1 = {
    .read   = snd_mixart_BA1_read,
};


static void snd_mixart_proc_read(struct snd_info_entry *entry, 
                                 struct snd_info_buffer *buffer)
{
    struct snd_mixart *chip = entry->private_data;        
    u32 ref; 

    snd_iprintf(buffer, "Digigram miXart (alsa card %d)\n\n", chip->chip_idx);

    /* stats available when embedded OS is running */
    if (chip->mgr->dsp_loaded & ( 1 << MIXART_MOTHERBOARD_ELF_INDEX)) {
        snd_iprintf(buffer, "- hardware -\n");
        switch (chip->mgr->board_type ) {
        case MIXART_DAUGHTER_TYPE_NONE     : snd_iprintf(buffer, "\tmiXart8 (no daughter board)\n\n"); break;
        case MIXART_DAUGHTER_TYPE_AES      : snd_iprintf(buffer, "\tmiXart8 AES/EBU\n\n"); break;
        case MIXART_DAUGHTER_TYPE_COBRANET : snd_iprintf(buffer, "\tmiXart8 Cobranet\n\n"); break;
        default:                             snd_iprintf(buffer, "\tUNKNOWN!\n\n"); break;
        }

        snd_iprintf(buffer, "- system load -\n");    

        /* get perf reference */

        ref = readl_be( MIXART_MEM( chip->mgr, MIXART_PSEUDOREG_PERF_SYSTEM_LOAD_OFFSET));

        if (ref) {
            u32 mailbox   = 100 * readl_be( MIXART_MEM( chip->mgr, MIXART_PSEUDOREG_PERF_MAILBX_LOAD_OFFSET)) / ref;
            u32 streaming = 100 * readl_be( MIXART_MEM( chip->mgr, MIXART_PSEUDOREG_PERF_STREAM_LOAD_OFFSET)) / ref;
            u32 interr    = 100 * readl_be( MIXART_MEM( chip->mgr, MIXART_PSEUDOREG_PERF_INTERR_LOAD_OFFSET)) / ref;

            snd_iprintf(buffer, "\tstreaming          : %d\n", streaming);
            snd_iprintf(buffer, "\tmailbox            : %d\n", mailbox);
            snd_iprintf(buffer, "\tinterrups handling : %d\n\n", interr);
        }
    } /* endif elf loaded */
}

static void __devinit snd_mixart_proc_init(struct snd_mixart *chip)
{
    struct snd_info_entry *entry;

    /* text interface to read perf and temp meters */
    if (! snd_card_proc_new(chip->card, "board_info", &entry)) {
        entry->private_data = chip;
        entry->c.text.read = snd_mixart_proc_read;
    }

    if (! snd_card_proc_new(chip->card, "mixart_BA0", &entry)) {
        entry->content = SNDRV_INFO_CONTENT_DATA;
        entry->private_data = chip->mgr;    
        entry->c.ops = &snd_mixart_proc_ops_BA0;
        entry->size = MIXART_BA0_SIZE;
    }
    if (! snd_card_proc_new(chip->card, "mixart_BA1", &entry)) {
        entry->content = SNDRV_INFO_CONTENT_DATA;
        entry->private_data = chip->mgr;
        entry->c.ops = &snd_mixart_proc_ops_BA1;
        entry->size = MIXART_BA1_SIZE;
    }
}
/* end of proc interface */


/*
 *    probe function - creates the card manager
 */
static int __devinit snd_mixart_probe(struct pci_dev *pci,
                      const struct pci_device_id *pci_id)
{
    static int dev;
    struct mixart_mgr *mgr;
    unsigned int i;
    int err;
    size_t size;

    /*
     */
    if (dev >= SNDRV_CARDS)
        return -ENODEV;
    if (! enable[dev]) {
        dev++;
        return -ENOENT;
    }

    /* enable PCI device */
    if ((err = pci_enable_device(pci)) < 0)
        return err;
    pci_set_master(pci);

    /* check if we can restrict PCI DMA transfers to 32 bits */
    if (pci_set_dma_mask(pci, DMA_BIT_MASK(32)) < 0) {
        snd_printk(KERN_ERR "architecture does not support 32bit PCI busmaster DMA\n");
        pci_disable_device(pci);
        return -ENXIO;
    }

    /*
     */
    mgr = kzalloc(sizeof(*mgr), GFP_KERNEL);
    if (! mgr) {
        pci_disable_device(pci);
        return -ENOMEM;
    }

    mgr->pci = pci;
    mgr->irq = -1;

    /* resource assignment */
    if ((err = pci_request_regions(pci, CARD_NAME)) < 0) {
        kfree(mgr);
        pci_disable_device(pci);
        return err;
    }
    for (i = 0; i < 2; i++) {
        mgr->mem[i].phys = pci_resource_start(pci, i);
        mgr->mem[i].virt = pci_ioremap_bar(pci, i);
        if (!mgr->mem[i].virt) {
                printk(KERN_ERR "unable to remap resource 0x%lx\n",
                   mgr->mem[i].phys);
            snd_mixart_free(mgr);
            return -EBUSY;
        }
    }

    if (request_irq(pci->irq, snd_mixart_interrupt, IRQF_SHARED,
            KBUILD_MODNAME, mgr)) {
        snd_printk(KERN_ERR "unable to grab IRQ %d\n", pci->irq);
        snd_mixart_free(mgr);
        return -EBUSY;
    }
    mgr->irq = pci->irq;

    sprintf(mgr->shortname, "Digigram miXart");
    sprintf(mgr->longname, "%s at 0x%lx & 0x%lx, irq %i", mgr->shortname, mgr->mem[0].phys, mgr->mem[1].phys, mgr->irq);

    /* ISR spinlock  */
    spin_lock_init(&mgr->lock);

    /* init mailbox  */
    mgr->msg_fifo_readptr = 0;
    mgr->msg_fifo_writeptr = 0;

    spin_lock_init(&mgr->msg_lock);
    mutex_init(&mgr->msg_mutex);
    init_waitqueue_head(&mgr->msg_sleep);
    atomic_set(&mgr->msg_processed, 0);

    /* init setup mutex*/
    mutex_init(&mgr->setup_mutex);

    /* init message taslket */
    tasklet_init(&mgr->msg_taskq, snd_mixart_msg_tasklet, (unsigned long) mgr);

    /* card assignment */
    mgr->num_cards = MIXART_MAX_CARDS; /* 4  FIXME: configurable? */
    for (i = 0; i < mgr->num_cards; i++) {
        struct snd_card *card;
        char tmpid[16];
        int idx;

        if (index[dev] < 0)
            idx = index[dev];
        else
            idx = index[dev] + i;
        snprintf(tmpid, sizeof(tmpid), "%s-%d", id[dev] ? id[dev] : "MIXART", i);
        err = snd_card_create(idx, tmpid, THIS_MODULE, 0, &card);

        if (err < 0) {
            snd_printk(KERN_ERR "cannot allocate the card %d\n", i);
            snd_mixart_free(mgr);
            return err;
        }

        strcpy(card->driver, CARD_NAME);
        sprintf(card->shortname, "%s [PCM #%d]", mgr->shortname, i);
        sprintf(card->longname, "%s [PCM #%d]", mgr->longname, i);

        if ((err = snd_mixart_create(mgr, card, i)) < 0) {
            snd_card_free(card);
            snd_mixart_free(mgr);
            return err;
        }

        if(i==0) {
            /* init proc interface only for chip0 */
            snd_mixart_proc_init(mgr->chip[i]);
        }

        if ((err = snd_card_register(card)) < 0) {
            snd_mixart_free(mgr);
            return err;
        }
    }

    /* init firmware status (mgr->dsp_loaded reset in hwdep_new) */
    mgr->board_type = MIXART_DAUGHTER_TYPE_NONE;

    /* create array of streaminfo */
    size = PAGE_ALIGN( (MIXART_MAX_STREAM_PER_CARD * MIXART_MAX_CARDS *
                sizeof(struct mixart_flowinfo)) );
    if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(pci),
                size, &mgr->flowinfo) < 0) {
        snd_mixart_free(mgr);
        return -ENOMEM;
    }
    /* init streaminfo_array */
    memset(mgr->flowinfo.area, 0, size);

    /* create array of bufferinfo */
    size = PAGE_ALIGN( (MIXART_MAX_STREAM_PER_CARD * MIXART_MAX_CARDS *
                sizeof(struct mixart_bufferinfo)) );
    if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, snd_dma_pci_data(pci),
                size, &mgr->bufferinfo) < 0) {
        snd_mixart_free(mgr);
        return -ENOMEM;
    }
    /* init bufferinfo_array */
    memset(mgr->bufferinfo.area, 0, size);

    /* set up firmware */
    err = snd_mixart_setup_firmware(mgr);
    if (err < 0) {
        snd_mixart_free(mgr);
        return err;
    }

    pci_set_drvdata(pci, mgr);
    dev++;
    return 0;
}

static void __devexit snd_mixart_remove(struct pci_dev *pci)
{
    snd_mixart_free(pci_get_drvdata(pci));
    pci_set_drvdata(pci, NULL);
}

static struct pci_driver mixart_driver = {
    .name = KBUILD_MODNAME,
    .id_table = snd_mixart_ids,
    .probe = snd_mixart_probe,
    .remove = __devexit_p(snd_mixart_remove),
};

module_pci_driver(mixart_driver);