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Sourcecode: alsa-driver version File versions

usX2Yhwdep.c

/*
 * Driver for Tascam US-X2Y USB soundcards
 *
 * FPGA Loader + ALSA Startup
 *
 * Copyright (c) 2003 by Karsten Wiese <annabellesgarden@yahoo.de>
 *
 *   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 <sound/driver.h>
#include <linux/interrupt.h>
#include <linux/usb.h>
#include <sound/core.h>
#include <sound/memalloc.h>
#include <sound/pcm.h>
#include <sound/hwdep.h>
#include "usx2y.h"
#include "usbusx2y.h"
#include "usX2Yhwdep.h"

int usX2Y_hwdep_pcm_new(struct snd_card *card);


static struct page * snd_us428ctls_vm_nopage(struct vm_area_struct *area, unsigned long address, int *type)
{
      unsigned long offset;
      struct page * page;
      void *vaddr;

      snd_printdd("ENTER, start %lXh, ofs %lXh, pgoff %ld, addr %lXh\n",
               area->vm_start,
               address - area->vm_start,
               (address - area->vm_start) >> PAGE_SHIFT,
               address);
      
      offset = area->vm_pgoff << PAGE_SHIFT;
      offset += address - area->vm_start;
      snd_assert((offset % PAGE_SIZE) == 0, return NOPAGE_OOM);
      vaddr = (char*)((struct usX2Ydev *)area->vm_private_data)->us428ctls_sharedmem + offset;
      page = virt_to_page(vaddr);
      get_page(page);
      snd_printdd( "vaddr=%p made us428ctls_vm_nopage() return %p; offset=%lX\n", vaddr, page, offset);

      if (type)
            *type = VM_FAULT_MINOR;

      return page;
}

static struct vm_operations_struct us428ctls_vm_ops = {
      .nopage = snd_us428ctls_vm_nopage,
};

static int snd_us428ctls_mmap(struct snd_hwdep * hw, struct file *filp, struct vm_area_struct *area)
{
      unsigned long     size = (unsigned long)(area->vm_end - area->vm_start);
      struct usX2Ydev   *us428 = hw->private_data;

      // FIXME this hwdep interface is used twice: fpga download and mmap for controlling Lights etc. Maybe better using 2 hwdep devs?
      // so as long as the device isn't fully initialised yet we return -EBUSY here.
      if (!(us428->chip_status & USX2Y_STAT_CHIP_INIT))
            return -EBUSY;

      /* if userspace tries to mmap beyond end of our buffer, fail */ 
        if (size > PAGE_ALIGN(sizeof(struct us428ctls_sharedmem))) {
            snd_printd( "%lu > %lu\n", size, (unsigned long)sizeof(struct us428ctls_sharedmem)); 
                return -EINVAL;
      }

      if (!us428->us428ctls_sharedmem) {
            init_waitqueue_head(&us428->us428ctls_wait_queue_head);
            if(!(us428->us428ctls_sharedmem = snd_malloc_pages(sizeof(struct us428ctls_sharedmem), GFP_KERNEL)))
                  return -ENOMEM;
            memset(us428->us428ctls_sharedmem, -1, sizeof(struct us428ctls_sharedmem));
            us428->us428ctls_sharedmem->CtlSnapShotLast = -2;
      }
      area->vm_ops = &us428ctls_vm_ops;
      area->vm_flags |= VM_RESERVED;
      area->vm_private_data = hw->private_data;
      return 0;
}

static unsigned int snd_us428ctls_poll(struct snd_hwdep *hw, struct file *file, poll_table *wait)
{
      unsigned int      mask = 0;
      struct usX2Ydev   *us428 = hw->private_data;
      struct us428ctls_sharedmem *shm = us428->us428ctls_sharedmem;
      if (us428->chip_status & USX2Y_STAT_CHIP_HUP)
            return POLLHUP;

      poll_wait(file, &us428->us428ctls_wait_queue_head, wait);

      if (shm != NULL && shm->CtlSnapShotLast != shm->CtlSnapShotRed)
            mask |= POLLIN;

      return mask;
}


static int snd_usX2Y_hwdep_open(struct snd_hwdep *hw, struct file *file)
{
      return 0;
}

static int snd_usX2Y_hwdep_release(struct snd_hwdep *hw, struct file *file)
{
      return 0;
}

static int snd_usX2Y_hwdep_dsp_status(struct snd_hwdep *hw,
                              struct snd_hwdep_dsp_status *info)
{
      static char *type_ids[USX2Y_TYPE_NUMS] = {
            [USX2Y_TYPE_122] = "us122",
            [USX2Y_TYPE_224] = "us224",
            [USX2Y_TYPE_428] = "us428",
      };
      struct usX2Ydev   *us428 = hw->private_data;
      int id = -1;

      switch (le16_to_cpu(us428->chip.dev->descriptor.idProduct)) {
      case USB_ID_US122:
            id = USX2Y_TYPE_122;
            break;
      case USB_ID_US224:
            id = USX2Y_TYPE_224;
            break;
      case USB_ID_US428:
            id = USX2Y_TYPE_428;
            break;
      }
      if (0 > id)
            return -ENODEV;
      strcpy(info->id, type_ids[id]);
      info->num_dsps = 2;           // 0: Prepad Data, 1: FPGA Code
      if (us428->chip_status & USX2Y_STAT_CHIP_INIT)
            info->chip_ready = 1;
      info->version = USX2Y_DRIVER_VERSION; 
      return 0;
}


static int usX2Y_create_usbmidi(struct snd_card *card)
{
      static struct snd_usb_midi_endpoint_info quirk_data_1 = {
            .out_ep = 0x06,
            .in_ep = 0x06,
            .out_cables =     0x001,
            .in_cables =      0x001
      };
      static struct snd_usb_audio_quirk quirk_1 = {
            .vendor_name =    "TASCAM",
            .product_name =   NAME_ALLCAPS,
            .ifnum =    0,
                  .type = QUIRK_MIDI_FIXED_ENDPOINT,
            .data = &quirk_data_1
      };
      static struct snd_usb_midi_endpoint_info quirk_data_2 = {
            .out_ep = 0x06,
            .in_ep = 0x06,
            .out_cables =     0x003,
            .in_cables =      0x003
      };
      static struct snd_usb_audio_quirk quirk_2 = {
            .vendor_name =    "TASCAM",
            .product_name =   "US428",
            .ifnum =    0,
                  .type = QUIRK_MIDI_FIXED_ENDPOINT,
            .data = &quirk_data_2
      };
      struct usb_device *dev = usX2Y(card)->chip.dev;
      struct usb_interface *iface = usb_ifnum_to_if(dev, 0);
      struct snd_usb_audio_quirk *quirk =
            le16_to_cpu(dev->descriptor.idProduct) == USB_ID_US428 ?
            &quirk_2 : &quirk_1;

      snd_printdd("usX2Y_create_usbmidi \n");
      return snd_usb_create_midi_interface(&usX2Y(card)->chip, iface, quirk);
}

static int usX2Y_create_alsa_devices(struct snd_card *card)
{
      int err;

      do {
            if ((err = usX2Y_create_usbmidi(card)) < 0) {
                  snd_printk(KERN_ERR "usX2Y_create_alsa_devices: usX2Y_create_usbmidi error %i \n", err);
                  break;
            }
            if ((err = usX2Y_audio_create(card)) < 0) 
                  break;
            if ((err = usX2Y_hwdep_pcm_new(card)) < 0)
                  break;
            if ((err = snd_card_register(card)) < 0)
                  break;
      } while (0);

      return err;
} 

static int snd_usX2Y_hwdep_dsp_load(struct snd_hwdep *hw,
                            struct snd_hwdep_dsp_image *dsp)
{
      struct usX2Ydev *priv = hw->private_data;
      int   lret, err = -EINVAL;
      snd_printdd( "dsp_load %s\n", dsp->name);

      if (access_ok(VERIFY_READ, dsp->image, dsp->length)) {
            struct usb_device* dev = priv->chip.dev;
            char *buf = kmalloc(dsp->length, GFP_KERNEL);
            if (!buf)
                  return -ENOMEM;
            if (copy_from_user(buf, dsp->image, dsp->length)) {
                  kfree(buf);
                  return -EFAULT;
            }
            err = usb_set_interface(dev, 0, 1);
            if (err)
                  snd_printk(KERN_ERR "usb_set_interface error \n");
            else
                  err = usb_bulk_msg(dev, usb_sndbulkpipe(dev, 2), buf, dsp->length, &lret, 6000);
            kfree(buf);
      }
      if (err)
            return err;
      if (dsp->index == 1) {
            msleep(250);                        // give the device some time
            err = usX2Y_AsyncSeq04_init(priv);
            if (err) {
                  snd_printk(KERN_ERR "usX2Y_AsyncSeq04_init error \n");
                  return err;
            }
            err = usX2Y_In04_init(priv);
            if (err) {
                  snd_printk(KERN_ERR "usX2Y_In04_init error \n");
                  return err;
            }
            err = usX2Y_create_alsa_devices(hw->card);
            if (err) {
                  snd_printk(KERN_ERR "usX2Y_create_alsa_devices error %i \n", err);
                  snd_card_free(hw->card);
                  return err;
            }
            priv->chip_status |= USX2Y_STAT_CHIP_INIT; 
            snd_printdd("%s: alsa all started\n", hw->name);
      }
      return err;
}


int usX2Y_hwdep_new(struct snd_card *card, struct usb_device* device)
{
      int err;
      struct snd_hwdep *hw;

      if ((err = snd_hwdep_new(card, SND_USX2Y_LOADER_ID, 0, &hw)) < 0)
            return err;

      hw->iface = SNDRV_HWDEP_IFACE_USX2Y;
      hw->private_data = usX2Y(card);
      hw->ops.open = snd_usX2Y_hwdep_open;
      hw->ops.release = snd_usX2Y_hwdep_release;
      hw->ops.dsp_status = snd_usX2Y_hwdep_dsp_status;
      hw->ops.dsp_load = snd_usX2Y_hwdep_dsp_load;
      hw->ops.mmap = snd_us428ctls_mmap;
      hw->ops.poll = snd_us428ctls_poll;
      hw->exclusive = 1;
      sprintf(hw->name, "/proc/bus/usb/%03d/%03d", device->bus->busnum, device->devnum);
      return 0;
}


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