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root/sound/usb/usx2y/us122l.c

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DEFINITIONS

This source file includes following definitions.
  1. us122l_create_usbmidi
  2. us122l_ctl_msg
  3. pt_info_set
  4. usb_stream_hwdep_vm_open
  5. usb_stream_hwdep_vm_fault
  6. usb_stream_hwdep_vm_close
  7. usb_stream_hwdep_open
  8. usb_stream_hwdep_release
  9. usb_stream_hwdep_mmap
  10. usb_stream_hwdep_poll
  11. us122l_stop
  12. us122l_set_sample_rate
  13. us122l_start
  14. usb_stream_hwdep_ioctl
  15. usb_stream_hwdep_new
  16. us122l_create_card
  17. usx2y_create_card
  18. us122l_usb_probe
  19. snd_us122l_probe
  20. snd_us122l_disconnect
  21. snd_us122l_suspend
  22. snd_us122l_resume
  23. snd_us122l_module_init
  24. snd_us122l_module_exit

/*
 * Copyright (C) 2007, 2008 Karsten Wiese <fzu@wemgehoertderstaat.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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <sound/core.h>
#include <sound/hwdep.h>
#include <sound/pcm.h>
#include <sound/initval.h>
#define MODNAME "US122L"
#include "usb_stream.c"
#include "../usbaudio.h"
#include "us122l.h"

MODULE_AUTHOR("Karsten Wiese <fzu@wemgehoertderstaat.de>");
MODULE_DESCRIPTION("TASCAM "NAME_ALLCAPS" Version 0.5");
MODULE_LICENSE("GPL");

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

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

static int snd_us122l_card_used[SNDRV_CARDS];


static int us122l_create_usbmidi(struct snd_card *card)
{
        static struct snd_usb_midi_endpoint_info quirk_data = {
                .out_ep = 4,
                .in_ep = 3,
                .out_cables =   0x001,
                .in_cables =    0x001
        };
        static struct snd_usb_audio_quirk quirk = {
                .vendor_name =  "US122L",
                .product_name = NAME_ALLCAPS,
                .ifnum =        1,
                .type = QUIRK_MIDI_US122L,
                .data = &quirk_data
        };
        struct usb_device *dev = US122L(card)->chip.dev;
        struct usb_interface *iface = usb_ifnum_to_if(dev, 1);

        return snd_usb_create_midi_interface(&US122L(card)->chip,
                                             iface, &quirk);
}

/*
 * Wrapper for usb_control_msg().
 * Allocates a temp buffer to prevent dmaing from/to the stack.
 */
static int us122l_ctl_msg(struct usb_device *dev, unsigned int pipe,
                          __u8 request, __u8 requesttype,
                          __u16 value, __u16 index, void *data,
                          __u16 size, int timeout)
{
        int err;
        void *buf = NULL;

        if (size > 0) {
                buf = kmemdup(data, size, GFP_KERNEL);
                if (!buf)
                        return -ENOMEM;
        }
        err = usb_control_msg(dev, pipe, request, requesttype,
                              value, index, buf, size, timeout);
        if (size > 0) {
                memcpy(data, buf, size);
                kfree(buf);
        }
        return err;
}

static void pt_info_set(struct usb_device *dev, u8 v)
{
        int ret;

        ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
                              'I',
                              USB_DIR_OUT | USB_TYPE_VENDOR | USB_RECIP_DEVICE,
                              v, 0, NULL, 0, 1000);
        snd_printdd(KERN_DEBUG "%i\n", ret);
}

static void usb_stream_hwdep_vm_open(struct vm_area_struct *area)
{
        struct us122l *us122l = area->vm_private_data;
        atomic_inc(&us122l->mmap_count);
        snd_printdd(KERN_DEBUG "%i\n", atomic_read(&us122l->mmap_count));
}

static int usb_stream_hwdep_vm_fault(struct vm_area_struct *area,
                                     struct vm_fault *vmf)
{
        unsigned long offset;
        struct page *page;
        void *vaddr;
        struct us122l *us122l = area->vm_private_data;
        struct usb_stream *s;
        int vm_f = VM_FAULT_SIGBUS;

        mutex_lock(&us122l->mutex);
        s = us122l->sk.s;
        if (!s)
                goto out;

        offset = vmf->pgoff << PAGE_SHIFT;
        if (offset < PAGE_ALIGN(s->read_size))
                vaddr = (char *)s + offset;
        else {
                offset -= PAGE_ALIGN(s->read_size);
                if (offset >= PAGE_ALIGN(s->write_size))
                        goto out;

                vaddr = us122l->sk.write_page + offset;
        }
        page = virt_to_page(vaddr);

        get_page(page);
        mutex_unlock(&us122l->mutex);

        vmf->page = page;
        vm_f = 0;
out:
        return vm_f;
}

static void usb_stream_hwdep_vm_close(struct vm_area_struct *area)
{
        struct us122l *us122l = area->vm_private_data;
        atomic_dec(&us122l->mmap_count);
        snd_printdd(KERN_DEBUG "%i\n", atomic_read(&us122l->mmap_count));
}

static struct vm_operations_struct usb_stream_hwdep_vm_ops = {
        .open = usb_stream_hwdep_vm_open,
        .fault = usb_stream_hwdep_vm_fault,
        .close = usb_stream_hwdep_vm_close,
};


static int usb_stream_hwdep_open(struct snd_hwdep *hw, struct file *file)
{
        struct us122l   *us122l = hw->private_data;
        struct usb_interface *iface;
        snd_printdd(KERN_DEBUG "%p %p\n", hw, file);
        if (hw->used >= 2)
                return -EBUSY;

        if (!us122l->first)
                us122l->first = file;
        iface = usb_ifnum_to_if(us122l->chip.dev, 1);
        usb_autopm_get_interface(iface);
        return 0;
}

static int usb_stream_hwdep_release(struct snd_hwdep *hw, struct file *file)
{
        struct us122l   *us122l = hw->private_data;
        struct usb_interface *iface = usb_ifnum_to_if(us122l->chip.dev, 1);
        snd_printdd(KERN_DEBUG "%p %p\n", hw, file);
        usb_autopm_put_interface(iface);
        if (us122l->first == file)
                us122l->first = NULL;
        mutex_lock(&us122l->mutex);
        if (us122l->master == file)
                us122l->master = us122l->slave;

        us122l->slave = NULL;
        mutex_unlock(&us122l->mutex);
        return 0;
}

static int usb_stream_hwdep_mmap(struct snd_hwdep *hw,
                                 struct file *filp, struct vm_area_struct *area)
{
        unsigned long   size = area->vm_end - area->vm_start;
        struct us122l   *us122l = hw->private_data;
        unsigned long offset;
        struct usb_stream *s;
        int err = 0;
        bool read;

        offset = area->vm_pgoff << PAGE_SHIFT;
        mutex_lock(&us122l->mutex);
        s = us122l->sk.s;
        read = offset < s->read_size;
        if (read && area->vm_flags & VM_WRITE) {
                err = -EPERM;
                goto out;
        }
        snd_printdd(KERN_DEBUG "%lu %u\n", size,
                    read ? s->read_size : s->write_size);
        /* if userspace tries to mmap beyond end of our buffer, fail */
        if (size > PAGE_ALIGN(read ? s->read_size : s->write_size)) {
                snd_printk(KERN_WARNING "%lu > %u\n", size,
                           read ? s->read_size : s->write_size);
                err = -EINVAL;
                goto out;
        }

        area->vm_ops = &usb_stream_hwdep_vm_ops;
        area->vm_flags |= VM_RESERVED;
        area->vm_private_data = us122l;
        atomic_inc(&us122l->mmap_count);
out:
        mutex_unlock(&us122l->mutex);
        return err;
}

static unsigned int usb_stream_hwdep_poll(struct snd_hwdep *hw,
                                          struct file *file, poll_table *wait)
{
        struct us122l   *us122l = hw->private_data;
        struct usb_stream *s = us122l->sk.s;
        unsigned        *polled;
        unsigned int    mask;

        poll_wait(file, &us122l->sk.sleep, wait);

        switch (s->state) {
        case usb_stream_ready:
                if (us122l->first == file)
                        polled = &s->periods_polled;
                else
                        polled = &us122l->second_periods_polled;
                if (*polled != s->periods_done) {
                        *polled = s->periods_done;
                        mask = POLLIN | POLLOUT | POLLWRNORM;
                        break;
                }
                /* Fall through */
                mask = 0;
                break;
        default:
                mask = POLLIN | POLLOUT | POLLWRNORM | POLLERR;
                break;
        }
        return mask;
}

static void us122l_stop(struct us122l *us122l)
{
        struct list_head *p;
        list_for_each(p, &us122l->chip.midi_list)
                snd_usbmidi_input_stop(p);

        usb_stream_stop(&us122l->sk);
        usb_stream_free(&us122l->sk);
}

static int us122l_set_sample_rate(struct usb_device *dev, int rate)
{
        unsigned int ep = 0x81;
        unsigned char data[3];
        int err;

        data[0] = rate;
        data[1] = rate >> 8;
        data[2] = rate >> 16;
        err = us122l_ctl_msg(dev, usb_sndctrlpipe(dev, 0), SET_CUR,
                             USB_TYPE_CLASS|USB_RECIP_ENDPOINT|USB_DIR_OUT,
                             SAMPLING_FREQ_CONTROL << 8, ep, data, 3, 1000);
        if (err < 0)
                snd_printk(KERN_ERR "%d: cannot set freq %d to ep 0x%x\n",
                           dev->devnum, rate, ep);
        return err;
}

static bool us122l_start(struct us122l *us122l,
                         unsigned rate, unsigned period_frames)
{
        struct list_head *p;
        int err;
        unsigned use_packsize = 0;
        bool success = false;

        if (us122l->chip.dev->speed == USB_SPEED_HIGH) {
                /* The us-122l's descriptor defaults to iso max_packsize 78,
                   which isn't needed for samplerates <= 48000.
                   Lets save some memory:
                */
                switch (rate) {
                case 44100:
                        use_packsize = 36;
                        break;
                case 48000:
                        use_packsize = 42;
                        break;
                case 88200:
                        use_packsize = 72;
                        break;
                }
        }
        if (!usb_stream_new(&us122l->sk, us122l->chip.dev, 1, 2,
                            rate, use_packsize, period_frames, 6))
                goto out;

        err = us122l_set_sample_rate(us122l->chip.dev, rate);
        if (err < 0) {
                us122l_stop(us122l);
                snd_printk(KERN_ERR "us122l_set_sample_rate error \n");
                goto out;
        }
        err = usb_stream_start(&us122l->sk);
        if (err < 0) {
                us122l_stop(us122l);
                snd_printk(KERN_ERR "us122l_start error %i \n", err);
                goto out;
        }
        list_for_each(p, &us122l->chip.midi_list)
                snd_usbmidi_input_start(p);
        success = true;
out:
        return success;
}

static int usb_stream_hwdep_ioctl(struct snd_hwdep *hw, struct file *file,
                                  unsigned cmd, unsigned long arg)
{
        struct usb_stream_config *cfg;
        struct us122l *us122l = hw->private_data;
        unsigned min_period_frames;
        int err = 0;
        bool high_speed;

        if (cmd != SNDRV_USB_STREAM_IOCTL_SET_PARAMS)
                return -ENOTTY;

        cfg = kmalloc(sizeof(*cfg), GFP_KERNEL);
        if (!cfg)
                return -ENOMEM;

        if (copy_from_user(cfg, (void *)arg, sizeof(*cfg))) {
                err = -EFAULT;
                goto free;
        }
        if (cfg->version != USB_STREAM_INTERFACE_VERSION) {
                err = -ENXIO;
                goto free;
        }
        high_speed = us122l->chip.dev->speed == USB_SPEED_HIGH;
        if ((cfg->sample_rate != 44100 && cfg->sample_rate != 48000  &&
             (!high_speed ||
              (cfg->sample_rate != 88200 && cfg->sample_rate != 96000))) ||
            cfg->frame_size != 6 ||
            cfg->period_frames > 0x3000) {
                err = -EINVAL;
                goto free;
        }
        switch (cfg->sample_rate) {
        case 44100:
                min_period_frames = 48;
                break;
        case 48000:
                min_period_frames = 52;
                break;
        default:
                min_period_frames = 104;
                break;
        }
        if (!high_speed)
                min_period_frames <<= 1;
        if (cfg->period_frames < min_period_frames) {
                err = -EINVAL;
                goto free;
        }

        snd_power_wait(hw->card, SNDRV_CTL_POWER_D0);

        mutex_lock(&us122l->mutex);
        if (!us122l->master)
                us122l->master = file;
        else if (us122l->master != file) {
                if (memcmp(cfg, &us122l->sk.s->cfg, sizeof(*cfg))) {
                        err = -EIO;
                        goto unlock;
                }
                us122l->slave = file;
        }
        if (!us122l->sk.s ||
            memcmp(cfg, &us122l->sk.s->cfg, sizeof(*cfg)) ||
            us122l->sk.s->state == usb_stream_xrun) {
                us122l_stop(us122l);
                if (!us122l_start(us122l, cfg->sample_rate, cfg->period_frames))
                        err = -EIO;
                else
                        err = 1;
        }
unlock:
        mutex_unlock(&us122l->mutex);
free:
        kfree(cfg);
        return err;
}

#define SND_USB_STREAM_ID "USB STREAM"
static int usb_stream_hwdep_new(struct snd_card *card)
{
        int err;
        struct snd_hwdep *hw;
        struct usb_device *dev = US122L(card)->chip.dev;

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

        hw->iface = SNDRV_HWDEP_IFACE_USB_STREAM;
        hw->private_data = US122L(card);
        hw->ops.open = usb_stream_hwdep_open;
        hw->ops.release = usb_stream_hwdep_release;
        hw->ops.ioctl = usb_stream_hwdep_ioctl;
        hw->ops.ioctl_compat = usb_stream_hwdep_ioctl;
        hw->ops.mmap = usb_stream_hwdep_mmap;
        hw->ops.poll = usb_stream_hwdep_poll;

        sprintf(hw->name, "/proc/bus/usb/%03d/%03d/hwdeppcm",
                dev->bus->busnum, dev->devnum);
        return 0;
}


static bool us122l_create_card(struct snd_card *card)
{
        int err;
        struct us122l *us122l = US122L(card);

        err = usb_set_interface(us122l->chip.dev, 1, 1);
        if (err) {
                snd_printk(KERN_ERR "usb_set_interface error \n");
                return false;
        }

        pt_info_set(us122l->chip.dev, 0x11);
        pt_info_set(us122l->chip.dev, 0x10);

        if (!us122l_start(us122l, 44100, 256))
                return false;

        err = us122l_create_usbmidi(card);
        if (err < 0) {
                snd_printk(KERN_ERR "us122l_create_usbmidi error %i \n", err);
                us122l_stop(us122l);
                return false;
        }
        err = usb_stream_hwdep_new(card);
        if (err < 0) {
/* release the midi resources */
                struct list_head *p;
                list_for_each(p, &us122l->chip.midi_list)
                        snd_usbmidi_disconnect(p);

                us122l_stop(us122l);
                return false;
        }
        return true;
}

static struct snd_card *usx2y_create_card(struct usb_device *device)
{
        int             dev;
        struct snd_card *card;
        for (dev = 0; dev < SNDRV_CARDS; ++dev)
                if (enable[dev] && !snd_us122l_card_used[dev])
                        break;
        if (dev >= SNDRV_CARDS)
                return NULL;
        card = snd_card_new(index[dev], id[dev], THIS_MODULE,
                            sizeof(struct us122l));
        if (!card)
                return NULL;
        snd_us122l_card_used[US122L(card)->chip.index = dev] = 1;

        US122L(card)->chip.dev = device;
        US122L(card)->chip.card = card;
        mutex_init(&US122L(card)->mutex);
        init_waitqueue_head(&US122L(card)->sk.sleep);
        INIT_LIST_HEAD(&US122L(card)->chip.midi_list);
        strcpy(card->driver, "USB "NAME_ALLCAPS"");
        sprintf(card->shortname, "TASCAM "NAME_ALLCAPS"");
        sprintf(card->longname, "%s (%x:%x if %d at %03d/%03d)",
                card->shortname,
                le16_to_cpu(device->descriptor.idVendor),
                le16_to_cpu(device->descriptor.idProduct),
                0,
                US122L(card)->chip.dev->bus->busnum,
                US122L(card)->chip.dev->devnum
                );
        snd_card_set_dev(card, &device->dev);
        return card;
}

static void *us122l_usb_probe(struct usb_interface *intf,
                              const struct usb_device_id *device_id)
{
        struct usb_device *device = interface_to_usbdev(intf);
        struct snd_card *card = usx2y_create_card(device);

        if (!card)
                return NULL;

        if (!us122l_create_card(card) ||
            snd_card_register(card) < 0) {
                snd_card_free(card);
                return NULL;
        }

        usb_get_dev(device);
        return card;
}

static int snd_us122l_probe(struct usb_interface *intf,
                            const struct usb_device_id *id)
{
        struct snd_card *card;
        snd_printdd(KERN_DEBUG"%p:%i\n",
                    intf, intf->cur_altsetting->desc.bInterfaceNumber);
        if (intf->cur_altsetting->desc.bInterfaceNumber != 1)
                return 0;

        card = us122l_usb_probe(usb_get_intf(intf), id);

        if (card) {
                usb_set_intfdata(intf, card);
                return 0;
        }

        usb_put_intf(intf);
        return -EIO;
}

static void snd_us122l_disconnect(struct usb_interface *intf)
{
        struct snd_card *card;
        struct us122l *us122l;
        struct list_head *p;

        card = usb_get_intfdata(intf);
        if (!card)
                return;

        snd_card_disconnect(card);

        us122l = US122L(card);
        mutex_lock(&us122l->mutex);
        us122l_stop(us122l);
        mutex_unlock(&us122l->mutex);
        us122l->chip.shutdown = 1;

/* release the midi resources */
        list_for_each(p, &us122l->chip.midi_list) {
                snd_usbmidi_disconnect(p);
        }

        usb_put_intf(intf);
        usb_put_dev(US122L(card)->chip.dev);

        while (atomic_read(&us122l->mmap_count))
                msleep(500);

        snd_card_free(card);
}

static int snd_us122l_suspend(struct usb_interface *intf, pm_message_t message)
{
        struct snd_card *card;
        struct us122l *us122l;
        struct list_head *p;

        card = dev_get_drvdata(&intf->dev);
        if (!card)
                return 0;
        snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);

        us122l = US122L(card);
        if (!us122l)
                return 0;

        list_for_each(p, &us122l->chip.midi_list)
                snd_usbmidi_input_stop(p);

        mutex_lock(&us122l->mutex);
        usb_stream_stop(&us122l->sk);
        mutex_unlock(&us122l->mutex);

        return 0;
}

static int snd_us122l_resume(struct usb_interface *intf)
{
        struct snd_card *card;
        struct us122l *us122l;
        struct list_head *p;
        int err;

        card = dev_get_drvdata(&intf->dev);
        if (!card)
                return 0;

        us122l = US122L(card);
        if (!us122l)
                return 0;

        mutex_lock(&us122l->mutex);
        /* needed, doesn't restart without: */
        err = usb_set_interface(us122l->chip.dev, 1, 1);
        if (err) {
                snd_printk(KERN_ERR "usb_set_interface error \n");
                goto unlock;
        }

        pt_info_set(us122l->chip.dev, 0x11);
        pt_info_set(us122l->chip.dev, 0x10);

        err = us122l_set_sample_rate(us122l->chip.dev,
                                     us122l->sk.s->cfg.sample_rate);
        if (err < 0) {
                snd_printk(KERN_ERR "us122l_set_sample_rate error \n");
                goto unlock;
        }
        err = usb_stream_start(&us122l->sk);
        if (err)
                goto unlock;

        list_for_each(p, &us122l->chip.midi_list)
                snd_usbmidi_input_start(p);
unlock:
        mutex_unlock(&us122l->mutex);
        snd_power_change_state(card, SNDRV_CTL_POWER_D0);
        return err;
}

static struct usb_device_id snd_us122l_usb_id_table[] = {
        {
                .match_flags =  USB_DEVICE_ID_MATCH_DEVICE,
                .idVendor =     0x0644,
                .idProduct =    USB_ID_US122L
        },
/*      { */            /* US-144 maybe works when @USB1.1. Untested. */
/*              .match_flags =  USB_DEVICE_ID_MATCH_DEVICE, */
/*              .idVendor =     0x0644, */
/*              .idProduct =    USB_ID_US144 */
/*      }, */
        { /* terminator */ }
};

MODULE_DEVICE_TABLE(usb, snd_us122l_usb_id_table);
static struct usb_driver snd_us122l_usb_driver = {
        .name =         "snd-usb-us122l",
        .probe =        snd_us122l_probe,
        .disconnect =   snd_us122l_disconnect,
        .suspend =      snd_us122l_suspend,
        .resume =       snd_us122l_resume,
        .reset_resume = snd_us122l_resume,
        .id_table =     snd_us122l_usb_id_table,
        .supports_autosuspend = 1
};


static int __init snd_us122l_module_init(void)
{
        return usb_register(&snd_us122l_usb_driver);
}

static void __exit snd_us122l_module_exit(void)
{
        usb_deregister(&snd_us122l_usb_driver);
}

module_init(snd_us122l_module_init)
module_exit(snd_us122l_module_exit)

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