/*
   *   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/usb.h>
  
  #include <sound/core.h>
  #include <sound/info.h>
  #include <sound/pcm.h>
  
  #include "usbaudio.h"
  #include "helper.h"
  #include "card.h"
  #include "endpoint.h"
  #include "proc.h"
  
  /* convert our full speed USB rate into sampling rate in Hz */
  static inline unsigned get_full_speed_hz(unsigned int usb_rate)
  {
  	return (usb_rate * 125 + (1 << 12)) >> 13;
  }
  
  /* convert our high speed USB rate into sampling rate in Hz */
  static inline unsigned get_high_speed_hz(unsigned int usb_rate)
  {
  	return (usb_rate * 125 + (1 << 9)) >> 10;
  }
  
  /*
   * common proc files to show the usb device info
   */
  static void proc_audio_usbbus_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
  {
  	struct snd_usb_audio *chip = entry->private_data;
  	if (!chip->shutdown)
  		snd_iprintf(buffer, "%03d/%03d
  ", chip->dev->bus->busnum, chip->dev->devnum);
  }
  
  static void proc_audio_usbid_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
  {
  	struct snd_usb_audio *chip = entry->private_data;
  	if (!chip->shutdown)
  		snd_iprintf(buffer, "%04x:%04x
  ", 
  			    USB_ID_VENDOR(chip->usb_id),
  			    USB_ID_PRODUCT(chip->usb_id));
  }
  
  void snd_usb_audio_create_proc(struct snd_usb_audio *chip)
  {
  	struct snd_info_entry *entry;
  	if (!snd_card_proc_new(chip->card, "usbbus", &entry))
  		snd_info_set_text_ops(entry, chip, proc_audio_usbbus_read);
  	if (!snd_card_proc_new(chip->card, "usbid", &entry))
  		snd_info_set_text_ops(entry, chip, proc_audio_usbid_read);
  }
  
  /*
   * proc interface for list the supported pcm formats
   */
  static void proc_dump_substream_formats(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
  {
  	struct audioformat *fp;
  	static char *sync_types[4] = {
  		"NONE", "ASYNC", "ADAPTIVE", "SYNC"
  	};
  
  	list_for_each_entry(fp, &subs->fmt_list, list) {
  		snd_pcm_format_t fmt;
  
  		snd_iprintf(buffer, "  Interface %d
  ", fp->iface);
  		snd_iprintf(buffer, "    Altset %d
  ", fp->altsetting);
  		snd_iprintf(buffer, "    Format:");
  		for (fmt = 0; fmt <= SNDRV_PCM_FORMAT_LAST; ++fmt)
  			if (fp->formats & pcm_format_to_bits(fmt))
  				snd_iprintf(buffer, " %s",
  					    snd_pcm_format_name(fmt));
  		snd_iprintf(buffer, "
  ");
  		snd_iprintf(buffer, "    Channels: %d
  ", fp->channels);
  		snd_iprintf(buffer, "    Endpoint: %d %s (%s)
  ",
  			    fp->endpoint & USB_ENDPOINT_NUMBER_MASK,
  			    fp->endpoint & USB_DIR_IN ? "IN" : "OUT",
  			    sync_types[(fp->ep_attr & USB_ENDPOINT_SYNCTYPE) >> 2]);
  		if (fp->rates & SNDRV_PCM_RATE_CONTINUOUS) {
  			snd_iprintf(buffer, "    Rates: %d - %d (continuous)
  ",
  				    fp->rate_min, fp->rate_max);
  		} else {
  			unsigned int i;
  			snd_iprintf(buffer, "    Rates: ");
  			for (i = 0; i < fp->nr_rates; i++) {
  				if (i > 0)
  					snd_iprintf(buffer, ", ");
  				snd_iprintf(buffer, "%d", fp->rate_table[i]);
  			}
  			snd_iprintf(buffer, "
  ");
  		}
  		if (subs->speed != USB_SPEED_FULL)
  			snd_iprintf(buffer, "    Data packet interval: %d us
  ",
  				    125 * (1 << fp->datainterval));
  		// snd_iprintf(buffer, "    Max Packet Size = %d
  ", fp->maxpacksize);
  		// snd_iprintf(buffer, "    EP Attribute = %#x
  ", fp->attributes);
  	}
  }
  
  static void proc_dump_ep_status(struct snd_usb_substream *subs,
  				struct snd_usb_endpoint *data_ep,
  				struct snd_usb_endpoint *sync_ep,
  				struct snd_info_buffer *buffer)
  {
  	if (!data_ep)
  		return;
  	snd_iprintf(buffer, "    Packet Size = %d
  ", data_ep->curpacksize);
  	snd_iprintf(buffer, "    Momentary freq = %u Hz (%#x.%04x)
  ",
  		    subs->speed == USB_SPEED_FULL
  		    ? get_full_speed_hz(data_ep->freqm)
  		    : get_high_speed_hz(data_ep->freqm),
  		    data_ep->freqm >> 16, data_ep->freqm & 0xffff);
  	if (sync_ep && data_ep->freqshift != INT_MIN) {
  		int res = 16 - data_ep->freqshift;
  		snd_iprintf(buffer, "    Feedback Format = %d.%d
  ",
  			    (sync_ep->syncmaxsize > 3 ? 32 : 24) - res, res);
  	}
  }
  
  static void proc_dump_substream_status(struct snd_usb_substream *subs, struct snd_info_buffer *buffer)
  {
  	if (subs->running) {
  		snd_iprintf(buffer, "  Status: Running
  ");
  		snd_iprintf(buffer, "    Interface = %d
  ", subs->interface);
  		snd_iprintf(buffer, "    Altset = %d
  ", subs->altset_idx);
  		proc_dump_ep_status(subs, subs->data_endpoint, subs->sync_endpoint, buffer);
  	} else {
  		snd_iprintf(buffer, "  Status: Stop
  ");
  	}
  }
  
  static void proc_pcm_format_read(struct snd_info_entry *entry, struct snd_info_buffer *buffer)
  {
  	struct snd_usb_stream *stream = entry->private_data;
  
  	snd_iprintf(buffer, "%s : %s
  ", stream->chip->card->longname, stream->pcm->name);
  
  	if (stream->substream[SNDRV_PCM_STREAM_PLAYBACK].num_formats) {
  		snd_iprintf(buffer, "
  Playback:
  ");
  		proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
  		proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_PLAYBACK], buffer);
  	}
  	if (stream->substream[SNDRV_PCM_STREAM_CAPTURE].num_formats) {
  		snd_iprintf(buffer, "
  Capture:
  ");
  		proc_dump_substream_status(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
  		proc_dump_substream_formats(&stream->substream[SNDRV_PCM_STREAM_CAPTURE], buffer);
  	}
  }
  
  void snd_usb_proc_pcm_format_add(struct snd_usb_stream *stream)
  {
  	struct snd_info_entry *entry;
  	char name[32];
  	struct snd_card *card = stream->chip->card;
  
  	sprintf(name, "stream%d", stream->pcm_index);
  	if (!snd_card_proc_new(card, name, &entry))
  		snd_info_set_text_ops(entry, stream, proc_pcm_format_read);
  }