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   /*
    * Driver for Digigram miXart soundcards
    *
    * main file with alsa callbacks
    *
    * Copyright (c) 2003 by Digigram <alsa@digigram.com>
    *
    *   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/moduleparam.h>
  #include <linux/mutex.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 <alsa@digigram.com>");
  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 int 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 struct pci_device_id snd_mixart_ids[] = {
          { 0x1057, 0x0003, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 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 fa��on non bloquante, r��appliquer 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) {
                 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,
        };

        mgr->chip[idx] = 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;
        }

        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
 */
static long long snd_mixart_BA0_llseek(struct snd_info_entry *entry,
                                       void *private_file_data,
                                       struct file *file,
                                       long long offset,
                                       int orig)
{
        offset = offset & ~3; /* 4 bytes aligned */

        switch(orig) {
        case SEEK_SET:
                file->f_pos = offset;
                break;
        case SEEK_CUR:
                file->f_pos += offset;
                break;
        case SEEK_END: /* offset is negative */
                file->f_pos = MIXART_BA0_SIZE + offset;
                break;
        default:
                return -EINVAL;
        }
        if(file->f_pos > MIXART_BA0_SIZE)
                file->f_pos = MIXART_BA0_SIZE;
        return file->f_pos;
}

static long long snd_mixart_BA1_llseek(struct snd_info_entry *entry,
                                       void *private_file_data,
                                       struct file *file,
                                       long long offset,
                                       int orig)
{
        offset = offset & ~3; /* 4 bytes aligned */

        switch(orig) {
        case SEEK_SET:
                file->f_pos = offset;
                break;
        case SEEK_CUR:
                file->f_pos += offset;
                break;
        case SEEK_END: /* offset is negative */
                file->f_pos = MIXART_BA1_SIZE + offset;
                break;
        default:
                return -EINVAL;
        }
        if(file->f_pos > MIXART_BA1_SIZE)
                file->f_pos = MIXART_BA1_SIZE;
        return file->f_pos;
}

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

        count = count & ~3; /* make sure the read size is a multiple of 4 bytes */
        if(count <= 0)
                return 0;
        if(pos + count > MIXART_BA0_SIZE)
                count = (long)(MIXART_BA0_SIZE - pos);
        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 long snd_mixart_BA1_read(struct snd_info_entry *entry, void *file_private_data,
                                struct file *file, char __user *buf,
                                unsigned long count, unsigned long pos)
{
        struct mixart_mgr *mgr = entry->private_data;

        count = count & ~3; /* make sure the read size is a multiple of 4 bytes */
        if(count <= 0)
                return 0;
        if(pos + count > MIXART_BA1_SIZE)
                count = (long)(MIXART_BA1_SIZE - pos);
        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,
        .llseek = snd_mixart_BA0_llseek
};

static struct snd_info_entry_ops snd_mixart_proc_ops_BA1 = {
        .read   = snd_mixart_BA1_read,
        .llseek = snd_mixart_BA1_llseek
};


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_32BIT_MASK) < 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,
                        CARD_NAME, 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);
                card = snd_card_new(idx, tmpid, THIS_MODULE, 0);

                if (! card) {
                        snd_printk(KERN_ERR "cannot allocate the card %d\n", i);
                        snd_mixart_free(mgr);
                        return -ENOMEM;
                }

                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_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 driver = {
        .name = "Digigram miXart",
        .id_table = snd_mixart_ids,
        .probe = snd_mixart_probe,
        .remove = __devexit_p(snd_mixart_remove),
};

static int __init alsa_card_mixart_init(void)
{
        return pci_register_driver(&driver);
}

static void __exit alsa_card_mixart_exit(void)
{
        pci_unregister_driver(&driver);
}

module_init(alsa_card_mixart_init)
module_exit(alsa_card_mixart_exit)