| /* |
| * Abstract layer for MIDI v1.0 stream |
| * Copyright (c) by Jaroslav Kysela <perex@suse.cz> |
| * |
| * |
| * 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 <sound/core.h> |
| #include <linux/major.h> |
| #include <linux/init.h> |
| #include <linux/sched.h> |
| #include <linux/slab.h> |
| #include <linux/time.h> |
| #include <linux/wait.h> |
| #include <linux/mutex.h> |
| #include <linux/moduleparam.h> |
| #include <linux/delay.h> |
| #include <sound/rawmidi.h> |
| #include <sound/info.h> |
| #include <sound/control.h> |
| #include <sound/minors.h> |
| #include <sound/initval.h> |
| |
| MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>"); |
| MODULE_DESCRIPTION("Midlevel RawMidi code for ALSA."); |
| MODULE_LICENSE("GPL"); |
| |
| #ifdef CONFIG_SND_OSSEMUL |
| static int midi_map[SNDRV_CARDS]; |
| static int amidi_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; |
| module_param_array(midi_map, int, NULL, 0444); |
| MODULE_PARM_DESC(midi_map, "Raw MIDI device number assigned to 1st OSS device."); |
| module_param_array(amidi_map, int, NULL, 0444); |
| MODULE_PARM_DESC(amidi_map, "Raw MIDI device number assigned to 2nd OSS device."); |
| #endif /* CONFIG_SND_OSSEMUL */ |
| |
| static int snd_rawmidi_free(struct snd_rawmidi *rawmidi); |
| static int snd_rawmidi_dev_free(struct snd_device *device); |
| static int snd_rawmidi_dev_register(struct snd_device *device); |
| static int snd_rawmidi_dev_disconnect(struct snd_device *device); |
| |
| static LIST_HEAD(snd_rawmidi_devices); |
| static DEFINE_MUTEX(register_mutex); |
| |
| static struct snd_rawmidi *snd_rawmidi_search(struct snd_card *card, int device) |
| { |
| struct snd_rawmidi *rawmidi; |
| |
| list_for_each_entry(rawmidi, &snd_rawmidi_devices, list) |
| if (rawmidi->card == card && rawmidi->device == device) |
| return rawmidi; |
| return NULL; |
| } |
| |
| static inline unsigned short snd_rawmidi_file_flags(struct file *file) |
| { |
| switch (file->f_mode & (FMODE_READ | FMODE_WRITE)) { |
| case FMODE_WRITE: |
| return SNDRV_RAWMIDI_LFLG_OUTPUT; |
| case FMODE_READ: |
| return SNDRV_RAWMIDI_LFLG_INPUT; |
| default: |
| return SNDRV_RAWMIDI_LFLG_OPEN; |
| } |
| } |
| |
| static inline int snd_rawmidi_ready(struct snd_rawmidi_substream *substream) |
| { |
| struct snd_rawmidi_runtime *runtime = substream->runtime; |
| return runtime->avail >= runtime->avail_min; |
| } |
| |
| static inline int snd_rawmidi_ready_append(struct snd_rawmidi_substream *substream, |
| size_t count) |
| { |
| struct snd_rawmidi_runtime *runtime = substream->runtime; |
| return runtime->avail >= runtime->avail_min && |
| (!substream->append || runtime->avail >= count); |
| } |
| |
| static void snd_rawmidi_input_event_tasklet(unsigned long data) |
| { |
| struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data; |
| substream->runtime->event(substream); |
| } |
| |
| static void snd_rawmidi_output_trigger_tasklet(unsigned long data) |
| { |
| struct snd_rawmidi_substream *substream = (struct snd_rawmidi_substream *)data; |
| substream->ops->trigger(substream, 1); |
| } |
| |
| static int snd_rawmidi_runtime_create(struct snd_rawmidi_substream *substream) |
| { |
| struct snd_rawmidi_runtime *runtime; |
| |
| if ((runtime = kzalloc(sizeof(*runtime), GFP_KERNEL)) == NULL) |
| return -ENOMEM; |
| spin_lock_init(&runtime->lock); |
| init_waitqueue_head(&runtime->sleep); |
| if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) |
| tasklet_init(&runtime->tasklet, |
| snd_rawmidi_input_event_tasklet, |
| (unsigned long)substream); |
| else |
| tasklet_init(&runtime->tasklet, |
| snd_rawmidi_output_trigger_tasklet, |
| (unsigned long)substream); |
| runtime->event = NULL; |
| runtime->buffer_size = PAGE_SIZE; |
| runtime->avail_min = 1; |
| if (substream->stream == SNDRV_RAWMIDI_STREAM_INPUT) |
| runtime->avail = 0; |
| else |
| runtime->avail = runtime->buffer_size; |
| if ((runtime->buffer = kmalloc(runtime->buffer_size, GFP_KERNEL)) == NULL) { |
| kfree(runtime); |
| return -ENOMEM; |
| } |
| runtime->appl_ptr = runtime->hw_ptr = 0; |
| substream->runtime = runtime; |
| return 0; |
| } |
| |
| static int snd_rawmidi_runtime_free(struct snd_rawmidi_substream *substream) |
| { |
| struct snd_rawmidi_runtime *runtime = substream->runtime; |
| |
| kfree(runtime->buffer); |
| kfree(runtime); |
| substream->runtime = NULL; |
| return 0; |
| } |
| |
| static inline void snd_rawmidi_output_trigger(struct snd_rawmidi_substream *substream,int up) |
| { |
| if (up) { |
| tasklet_hi_schedule(&substream->runtime->tasklet); |
| } else { |
| tasklet_kill(&substream->runtime->tasklet); |
| substream->ops->trigger(substream, 0); |
| } |
| } |
| |
| static void snd_rawmidi_input_trigger(struct snd_rawmidi_substream *substream, int up) |
| { |
| substream->ops->trigger(substream, up); |
| if (!up && substream->runtime->event) |
| tasklet_kill(&substream->runtime->tasklet); |
| } |
| |
| int snd_rawmidi_drop_output(struct snd_rawmidi_substream *substream) |
| { |
| unsigned long flags; |
| struct snd_rawmidi_runtime *runtime = substream->runtime; |
| |
| snd_rawmidi_output_trigger(substream, 0); |
| runtime->drain = 0; |
| spin_lock_irqsave(&runtime->lock, flags); |
| runtime->appl_ptr = runtime->hw_ptr = 0; |
| runtime->avail = runtime->buffer_size; |
| spin_unlock_irqrestore(&runtime->lock, flags); |
| return 0; |
| } |
| |
| int snd_rawmidi_drain_output(struct snd_rawmidi_substream *substream) |
| { |
| int err; |
| long timeout; |
| struct snd_rawmidi_runtime *runtime = substream->runtime; |
| |
| err = 0; |
| runtime->drain = 1; |
| timeout = wait_event_interruptible_timeout(runtime->sleep, |
| (runtime->avail >= runtime->buffer_size), |
| 10*HZ); |
| if (signal_pending(current)) |
| err = -ERESTARTSYS; |
| if (runtime->avail < runtime->buffer_size && !timeout) { |
| snd_printk(KERN_WARNING "rawmidi drain error (avail = %li, buffer_size = %li)\n", (long)runtime->avail, (long)runtime->buffer_size); |
| err = -EIO; |
| } |
| runtime->drain = 0; |
| if (err != -ERESTARTSYS) { |
| /* we need wait a while to make sure that Tx FIFOs are empty */ |
| if (substream->ops->drain) |
| substream->ops->drain(substream); |
| else |
| msleep(50); |
| snd_rawmidi_drop_output(substream); |
| } |
| return err; |
| } |
| |
| int snd_rawmidi_drain_input(struct snd_rawmidi_substream *substream) |
| { |
| unsigned long flags; |
| struct snd_rawmidi_runtime *runtime = substream->runtime; |
| |
| snd_rawmidi_input_trigger(substream, 0); |
| runtime->drain = 0; |
| spin_lock_irqsave(&runtime->lock, flags); |
| runtime->appl_ptr = runtime->hw_ptr = 0; |
| runtime->avail = 0; |
| spin_unlock_irqrestore(&runtime->lock, flags); |
| return 0; |
| } |
| |
| int snd_rawmidi_kernel_open(struct snd_card *card, int device, int subdevice, |
| int mode, struct snd_rawmidi_file * rfile) |
| { |
| struct snd_rawmidi *rmidi; |
| struct list_head *list1, *list2; |
| struct snd_rawmidi_substream *sinput = NULL, *soutput = NULL; |
| struct snd_rawmidi_runtime *input = NULL, *output = NULL; |
| int err; |
| |
| if (rfile) |
| rfile->input = rfile->output = NULL; |
| mutex_lock(®ister_mutex); |
| rmidi = snd_rawmidi_search(card, device); |
| mutex_unlock(®ister_mutex); |
| if (rmidi == NULL) { |
| err = -ENODEV; |
| goto __error1; |
| } |
| if (!try_module_get(rmidi->card->module)) { |
| err = -EFAULT; |
| goto __error1; |
| } |
| if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK)) |
| mutex_lock(&rmidi->open_mutex); |
| if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { |
| if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT)) { |
| err = -ENXIO; |
| goto __error; |
| } |
| if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) { |
| err = -ENODEV; |
| goto __error; |
| } |
| if (rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened >= |
| rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_count) { |
| err = -EAGAIN; |
| goto __error; |
| } |
| } |
| if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { |
| if (!(rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT)) { |
| err = -ENXIO; |
| goto __error; |
| } |
| if (subdevice >= 0 && (unsigned int)subdevice >= rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) { |
| err = -ENODEV; |
| goto __error; |
| } |
| if (rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened >= |
| rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_count) { |
| err = -EAGAIN; |
| goto __error; |
| } |
| } |
| list1 = rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams.next; |
| while (1) { |
| if (list1 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams) { |
| sinput = NULL; |
| if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { |
| err = -EAGAIN; |
| goto __error; |
| } |
| break; |
| } |
| sinput = list_entry(list1, struct snd_rawmidi_substream, list); |
| if ((mode & SNDRV_RAWMIDI_LFLG_INPUT) && sinput->opened) |
| goto __nexti; |
| if (subdevice < 0 || (subdevice >= 0 && subdevice == sinput->number)) |
| break; |
| __nexti: |
| list1 = list1->next; |
| } |
| list2 = rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams.next; |
| while (1) { |
| if (list2 == &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams) { |
| soutput = NULL; |
| if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { |
| err = -EAGAIN; |
| goto __error; |
| } |
| break; |
| } |
| soutput = list_entry(list2, struct snd_rawmidi_substream, list); |
| if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { |
| if (mode & SNDRV_RAWMIDI_LFLG_APPEND) { |
| if (soutput->opened && !soutput->append) |
| goto __nexto; |
| } else { |
| if (soutput->opened) |
| goto __nexto; |
| } |
| } |
| if (subdevice < 0 || (subdevice >= 0 && subdevice == soutput->number)) |
| break; |
| __nexto: |
| list2 = list2->next; |
| } |
| if (mode & SNDRV_RAWMIDI_LFLG_INPUT) { |
| if ((err = snd_rawmidi_runtime_create(sinput)) < 0) |
| goto __error; |
| input = sinput->runtime; |
| if ((err = sinput->ops->open(sinput)) < 0) |
| goto __error; |
| sinput->opened = 1; |
| rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened++; |
| } else { |
| sinput = NULL; |
| } |
| if (mode & SNDRV_RAWMIDI_LFLG_OUTPUT) { |
| if (soutput->opened) |
| goto __skip_output; |
| if ((err = snd_rawmidi_runtime_create(soutput)) < 0) { |
| if (mode & SNDRV_RAWMIDI_LFLG_INPUT) |
| sinput->ops->close(sinput); |
| goto __error; |
| } |
| output = soutput->runtime; |
| if ((err = soutput->ops->open(soutput)) < 0) { |
| if (mode & SNDRV_RAWMIDI_LFLG_INPUT) |
| sinput->ops->close(sinput); |
| goto __error; |
| } |
| __skip_output: |
| soutput->opened = 1; |
| if (mode & SNDRV_RAWMIDI_LFLG_APPEND) |
| soutput->append = 1; |
| if (soutput->use_count++ == 0) |
| soutput->active_sensing = 1; |
| rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened++; |
| } else { |
| soutput = NULL; |
| } |
| if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK)) |
| mutex_unlock(&rmidi->open_mutex); |
| if (rfile) { |
| rfile->rmidi = rmidi; |
| rfile->input = sinput; |
| rfile->output = soutput; |
| } |
| return 0; |
| |
| __error: |
| if (input != NULL) |
| snd_rawmidi_runtime_free(sinput); |
| if (output != NULL) |
| snd_rawmidi_runtime_free(soutput); |
| module_put(rmidi->card->module); |
| if (!(mode & SNDRV_RAWMIDI_LFLG_NOOPENLOCK)) |
| mutex_unlock(&rmidi->open_mutex); |
| __error1: |
| return err; |
| } |
| |
| static int snd_rawmidi_open(struct inode *inode, struct file *file) |
| { |
| int maj = imajor(inode); |
| struct snd_card *card; |
| int subdevice; |
| unsigned short fflags; |
| int err; |
| struct snd_rawmidi *rmidi; |
| struct snd_rawmidi_file *rawmidi_file; |
| wait_queue_t wait; |
| struct snd_ctl_file *kctl; |
| |
| if (maj == snd_major) { |
| rmidi = snd_lookup_minor_data(iminor(inode), |
| SNDRV_DEVICE_TYPE_RAWMIDI); |
| #ifdef CONFIG_SND_OSSEMUL |
| } else if (maj == SOUND_MAJOR) { |
| rmidi = snd_lookup_oss_minor_data(iminor(inode), |
| SNDRV_OSS_DEVICE_TYPE_MIDI); |
| #endif |
| } else |
| return -ENXIO; |
| |
| if (rmidi == NULL) |
| return -ENODEV; |
| if ((file->f_flags & O_APPEND) && !(file->f_flags & O_NONBLOCK)) |
| return -EINVAL; /* invalid combination */ |
| card = rmidi->card; |
| err = snd_card_file_add(card, file); |
| if (err < 0) |
| return -ENODEV; |
| fflags = snd_rawmidi_file_flags(file); |
| if ((file->f_flags & O_APPEND) || maj == SOUND_MAJOR) /* OSS emul? */ |
| fflags |= SNDRV_RAWMIDI_LFLG_APPEND; |
| fflags |= SNDRV_RAWMIDI_LFLG_NOOPENLOCK; |
| rawmidi_file = kmalloc(sizeof(*rawmidi_file), GFP_KERNEL); |
| if (rawmidi_file == NULL) { |
| snd_card_file_remove(card, file); |
| return -ENOMEM; |
| } |
| init_waitqueue_entry(&wait, current); |
| add_wait_queue(&rmidi->open_wait, &wait); |
| mutex_lock(&rmidi->open_mutex); |
| while (1) { |
| subdevice = -1; |
| down_read(&card->controls_rwsem); |
| list_for_each_entry(kctl, &card->ctl_files, list) { |
| if (kctl->pid == current->pid) { |
| subdevice = kctl->prefer_rawmidi_subdevice; |
| if (subdevice != -1) |
| break; |
| } |
| } |
| up_read(&card->controls_rwsem); |
| err = snd_rawmidi_kernel_open(rmidi->card, rmidi->device, |
| subdevice, fflags, rawmidi_file); |
| if (err >= 0) |
| break; |
| if (err == -EAGAIN) { |
| if (file->f_flags & O_NONBLOCK) { |
| err = -EBUSY; |
| break; |
| } |
| } else |
| break; |
| set_current_state(TASK_INTERRUPTIBLE); |
| mutex_unlock(&rmidi->open_mutex); |
| schedule(); |
| mutex_lock(&rmidi->open_mutex); |
| if (signal_pending(current)) { |
| err = -ERESTARTSYS; |
| break; |
| } |
| } |
| #ifdef CONFIG_SND_OSSEMUL |
| if (rawmidi_file->input && rawmidi_file->input->runtime) |
| rawmidi_file->input->runtime->oss = (maj == SOUND_MAJOR); |
| if (rawmidi_file->output && rawmidi_file->output->runtime) |
| rawmidi_file->output->runtime->oss = (maj == SOUND_MAJOR); |
| #endif |
| remove_wait_queue(&rmidi->open_wait, &wait); |
| if (err >= 0) { |
| file->private_data = rawmidi_file; |
| } else { |
| snd_card_file_remove(card, file); |
| kfree(rawmidi_file); |
| } |
| mutex_unlock(&rmidi->open_mutex); |
| return err; |
| } |
| |
| int snd_rawmidi_kernel_release(struct snd_rawmidi_file * rfile) |
| { |
| struct snd_rawmidi *rmidi; |
| struct snd_rawmidi_substream *substream; |
| struct snd_rawmidi_runtime *runtime; |
| |
| snd_assert(rfile != NULL, return -ENXIO); |
| snd_assert(rfile->input != NULL || rfile->output != NULL, return -ENXIO); |
| rmidi = rfile->rmidi; |
| mutex_lock(&rmidi->open_mutex); |
| if (rfile->input != NULL) { |
| substream = rfile->input; |
| rfile->input = NULL; |
| runtime = substream->runtime; |
| snd_rawmidi_input_trigger(substream, 0); |
| substream->ops->close(substream); |
| if (runtime->private_free != NULL) |
| runtime->private_free(substream); |
| snd_rawmidi_runtime_free(substream); |
| substream->opened = 0; |
| rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substream_opened--; |
| } |
| if (rfile->output != NULL) { |
| substream = rfile->output; |
| rfile->output = NULL; |
| if (--substream->use_count == 0) { |
| runtime = substream->runtime; |
| if (substream->active_sensing) { |
| unsigned char buf = 0xfe; |
| /* sending single active sensing message to shut the device up */ |
| snd_rawmidi_kernel_write(substream, &buf, 1); |
| } |
| if (snd_rawmidi_drain_output(substream) == -ERESTARTSYS) |
| snd_rawmidi_output_trigger(substream, 0); |
| substream->ops->close(substream); |
| if (runtime->private_free != NULL) |
| runtime->private_free(substream); |
| snd_rawmidi_runtime_free(substream); |
| substream->opened = 0; |
| substream->append = 0; |
| } |
| rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substream_opened--; |
| } |
| mutex_unlock(&rmidi->open_mutex); |
| module_put(rmidi->card->module); |
| return 0; |
| } |
| |
| static int snd_rawmidi_release(struct inode *inode, struct file *file) |
| { |
| struct snd_rawmidi_file *rfile; |
| struct snd_rawmidi *rmidi; |
| int err; |
| |
| rfile = file->private_data; |
| err = snd_rawmidi_kernel_release(rfile); |
| rmidi = rfile->rmidi; |
| wake_up(&rmidi->open_wait); |
| kfree(rfile); |
| snd_card_file_remove(rmidi->card, file); |
| return err; |
| } |
| |
| static int snd_rawmidi_info(struct snd_rawmidi_substream *substream, |
| struct snd_rawmidi_info *info) |
| { |
| struct snd_rawmidi *rmidi; |
| |
| if (substream == NULL) |
| return -ENODEV; |
| rmidi = substream->rmidi; |
| memset(info, 0, sizeof(*info)); |
| info->card = rmidi->card->number; |
| info->device = rmidi->device; |
| info->subdevice = substream->number; |
| info->stream = substream->stream; |
| info->flags = rmidi->info_flags; |
| strcpy(info->id, rmidi->id); |
| strcpy(info->name, rmidi->name); |
| strcpy(info->subname, substream->name); |
| info->subdevices_count = substream->pstr->substream_count; |
| info->subdevices_avail = (substream->pstr->substream_count - |
| substream->pstr->substream_opened); |
| return 0; |
| } |
| |
| static int snd_rawmidi_info_user(struct snd_rawmidi_substream *substream, |
| struct snd_rawmidi_info __user * _info) |
| { |
| struct snd_rawmidi_info info; |
| int err; |
| if ((err = snd_rawmidi_info(substream, &info)) < 0) |
| return err; |
| if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| int snd_rawmidi_info_select(struct snd_card *card, struct snd_rawmidi_info *info) |
| { |
| struct snd_rawmidi *rmidi; |
| struct snd_rawmidi_str *pstr; |
| struct snd_rawmidi_substream *substream; |
| |
| mutex_lock(®ister_mutex); |
| rmidi = snd_rawmidi_search(card, info->device); |
| mutex_unlock(®ister_mutex); |
| if (!rmidi) |
| return -ENXIO; |
| if (info->stream < 0 || info->stream > 1) |
| return -EINVAL; |
| pstr = &rmidi->streams[info->stream]; |
| if (pstr->substream_count == 0) |
| return -ENOENT; |
| if (info->subdevice >= pstr->substream_count) |
| return -ENXIO; |
| list_for_each_entry(substream, &pstr->substreams, list) { |
| if ((unsigned int)substream->number == info->subdevice) |
| return snd_rawmidi_info(substream, info); |
| } |
| return -ENXIO; |
| } |
| |
| static int snd_rawmidi_info_select_user(struct snd_card *card, |
| struct snd_rawmidi_info __user *_info) |
| { |
| int err; |
| struct snd_rawmidi_info info; |
| if (get_user(info.device, &_info->device)) |
| return -EFAULT; |
| if (get_user(info.stream, &_info->stream)) |
| return -EFAULT; |
| if (get_user(info.subdevice, &_info->subdevice)) |
| return -EFAULT; |
| if ((err = snd_rawmidi_info_select(card, &info)) < 0) |
| return err; |
| if (copy_to_user(_info, &info, sizeof(struct snd_rawmidi_info))) |
| return -EFAULT; |
| return 0; |
| } |
| |
| int snd_rawmidi_output_params(struct snd_rawmidi_substream *substream, |
| struct snd_rawmidi_params * params) |
| { |
| char *newbuf; |
| struct snd_rawmidi_runtime *runtime = substream->runtime; |
| |
| if (substream->append && substream->use_count > 1) |
| return -EBUSY; |
| snd_rawmidi_drain_output(substream); |
| if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { |
| return -EINVAL; |
| } |
| if (params->avail_min < 1 || params->avail_min > params->buffer_size) { |
| return -EINVAL; |
| } |
| if (params->buffer_size != runtime->buffer_size) { |
| newbuf = kmalloc(params->buffer_size, GFP_KERNEL); |
| if (!newbuf) |
| return -ENOMEM; |
| kfree(runtime->buffer); |
| runtime->buffer = newbuf; |
| runtime->buffer_size = params->buffer_size; |
| runtime->avail = runtime->buffer_size; |
| } |
| runtime->avail_min = params->avail_min; |
| substream->active_sensing = !params->no_active_sensing; |
| return 0; |
| } |
| |
| int snd_rawmidi_input_params(struct snd_rawmidi_substream *substream, |
| struct snd_rawmidi_params * params) |
| { |
| char *newbuf; |
| struct snd_rawmidi_runtime *runtime = substream->runtime; |
| |
| snd_rawmidi_drain_input(substream); |
| if (params->buffer_size < 32 || params->buffer_size > 1024L * 1024L) { |
| return -EINVAL; |
| } |
| if (params->avail_min < 1 || params->avail_min > params->buffer_size) { |
| return -EINVAL; |
| } |
| if (params->buffer_size != runtime->buffer_size) { |
| newbuf = kmalloc(params->buffer_size, GFP_KERNEL); |
| if (!newbuf) |
| return -ENOMEM; |
| kfree(runtime->buffer); |
| runtime->buffer = newbuf; |
| runtime->buffer_size = params->buffer_size; |
| } |
| runtime->avail_min = params->avail_min; |
| return 0; |
| } |
| |
| static int snd_rawmidi_output_status(struct snd_rawmidi_substream *substream, |
| struct snd_rawmidi_status * status) |
| { |
| struct snd_rawmidi_runtime *runtime = substream->runtime; |
| |
| memset(status, 0, sizeof(*status)); |
| status->stream = SNDRV_RAWMIDI_STREAM_OUTPUT; |
| spin_lock_irq(&runtime->lock); |
| status->avail = runtime->avail; |
| spin_unlock_irq(&runtime->lock); |
| return 0; |
| } |
| |
| static int snd_rawmidi_input_status(struct snd_rawmidi_substream *substream, |
| struct snd_rawmidi_status * status) |
| { |
| struct snd_rawmidi_runtime *runtime = substream->runtime; |
| |
| memset(status, 0, sizeof(*status)); |
| status->stream = SNDRV_RAWMIDI_STREAM_INPUT; |
| spin_lock_irq(&runtime->lock); |
| status->avail = runtime->avail; |
| status->xruns = runtime->xruns; |
| runtime->xruns = 0; |
| spin_unlock_irq(&runtime->lock); |
| return 0; |
| } |
| |
| static long snd_rawmidi_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| { |
| struct snd_rawmidi_file *rfile; |
| void __user *argp = (void __user *)arg; |
| |
| rfile = file->private_data; |
| if (((cmd >> 8) & 0xff) != 'W') |
| return -ENOTTY; |
| switch (cmd) { |
| case SNDRV_RAWMIDI_IOCTL_PVERSION: |
| return put_user(SNDRV_RAWMIDI_VERSION, (int __user *)argp) ? -EFAULT : 0; |
| case SNDRV_RAWMIDI_IOCTL_INFO: |
| { |
| int stream; |
| struct snd_rawmidi_info __user *info = argp; |
| if (get_user(stream, &info->stream)) |
| return -EFAULT; |
| switch (stream) { |
| case SNDRV_RAWMIDI_STREAM_INPUT: |
| return snd_rawmidi_info_user(rfile->input, info); |
| case SNDRV_RAWMIDI_STREAM_OUTPUT: |
| return snd_rawmidi_info_user(rfile->output, info); |
| default: |
| return -EINVAL; |
| } |
| } |
| case SNDRV_RAWMIDI_IOCTL_PARAMS: |
| { |
| struct snd_rawmidi_params params; |
| if (copy_from_user(¶ms, argp, sizeof(struct snd_rawmidi_params))) |
| return -EFAULT; |
| switch (params.stream) { |
| case SNDRV_RAWMIDI_STREAM_OUTPUT: |
| if (rfile->output == NULL) |
| return -EINVAL; |
| return snd_rawmidi_output_params(rfile->output, ¶ms); |
| case SNDRV_RAWMIDI_STREAM_INPUT: |
| if (rfile->input == NULL) |
| return -EINVAL; |
| return snd_rawmidi_input_params(rfile->input, ¶ms); |
| default: |
| return -EINVAL; |
| } |
| } |
| case SNDRV_RAWMIDI_IOCTL_STATUS: |
| { |
| int err = 0; |
| struct snd_rawmidi_status status; |
| if (copy_from_user(&status, argp, sizeof(struct snd_rawmidi_status))) |
| return -EFAULT; |
| switch (status.stream) { |
| case SNDRV_RAWMIDI_STREAM_OUTPUT: |
| if (rfile->output == NULL) |
| return -EINVAL; |
| err = snd_rawmidi_output_status(rfile->output, &status); |
| break; |
| case SNDRV_RAWMIDI_STREAM_INPUT: |
| if (rfile->input == NULL) |
| return -EINVAL; |
| err = snd_rawmidi_input_status(rfile->input, &status); |
| break; |
| default: |
| return -EINVAL; |
| } |
| if (err < 0) |
| return err; |
| if (copy_to_user(argp, &status, sizeof(struct snd_rawmidi_status))) |
| return -EFAULT; |
| return 0; |
| } |
| case SNDRV_RAWMIDI_IOCTL_DROP: |
| { |
| int val; |
| if (get_user(val, (int __user *) argp)) |
| return -EFAULT; |
| switch (val) { |
| case SNDRV_RAWMIDI_STREAM_OUTPUT: |
| if (rfile->output == NULL) |
| return -EINVAL; |
| return snd_rawmidi_drop_output(rfile->output); |
| default: |
| return -EINVAL; |
| } |
| } |
| case SNDRV_RAWMIDI_IOCTL_DRAIN: |
| { |
| int val; |
| if (get_user(val, (int __user *) argp)) |
| return -EFAULT; |
| switch (val) { |
| case SNDRV_RAWMIDI_STREAM_OUTPUT: |
| if (rfile->output == NULL) |
| return -EINVAL; |
| return snd_rawmidi_drain_output(rfile->output); |
| case SNDRV_RAWMIDI_STREAM_INPUT: |
| if (rfile->input == NULL) |
| return -EINVAL; |
| return snd_rawmidi_drain_input(rfile->input); |
| default: |
| return -EINVAL; |
| } |
| } |
| #ifdef CONFIG_SND_DEBUG |
| default: |
| snd_printk(KERN_WARNING "rawmidi: unknown command = 0x%x\n", cmd); |
| #endif |
| } |
| return -ENOTTY; |
| } |
| |
| static int snd_rawmidi_control_ioctl(struct snd_card *card, |
| struct snd_ctl_file *control, |
| unsigned int cmd, |
| unsigned long arg) |
| { |
| void __user *argp = (void __user *)arg; |
| |
| switch (cmd) { |
| case SNDRV_CTL_IOCTL_RAWMIDI_NEXT_DEVICE: |
| { |
| int device; |
| |
| if (get_user(device, (int __user *)argp)) |
| return -EFAULT; |
| mutex_lock(®ister_mutex); |
| device = device < 0 ? 0 : device + 1; |
| while (device < SNDRV_RAWMIDI_DEVICES) { |
| if (snd_rawmidi_search(card, device)) |
| break; |
| device++; |
| } |
| if (device == SNDRV_RAWMIDI_DEVICES) |
| device = -1; |
| mutex_unlock(®ister_mutex); |
| if (put_user(device, (int __user *)argp)) |
| return -EFAULT; |
| return 0; |
| } |
| case SNDRV_CTL_IOCTL_RAWMIDI_PREFER_SUBDEVICE: |
| { |
| int val; |
| |
| if (get_user(val, (int __user *)argp)) |
| return -EFAULT; |
| control->prefer_rawmidi_subdevice = val; |
| return 0; |
| } |
| case SNDRV_CTL_IOCTL_RAWMIDI_INFO: |
| return snd_rawmidi_info_select_user(card, argp); |
| } |
| return -ENOIOCTLCMD; |
| } |
| |
| /** |
| * snd_rawmidi_receive - receive the input data from the device |
| * @substream: the rawmidi substream |
| * @buffer: the buffer pointer |
| * @count: the data size to read |
| * |
| * Reads the data from the internal buffer. |
| * |
| * Returns the size of read data, or a negative error code on failure. |
| */ |
| int snd_rawmidi_receive(struct snd_rawmidi_substream *substream, |
| const unsigned char *buffer, int count) |
| { |
| unsigned long flags; |
| int result = 0, count1; |
| struct snd_rawmidi_runtime *runtime = substream->runtime; |
| |
| if (runtime->buffer == NULL) { |
| snd_printd("snd_rawmidi_receive: input is not active!!!\n"); |
| return -EINVAL; |
| } |
| spin_lock_irqsave(&runtime->lock, flags); |
| if (count == 1) { /* special case, faster code */ |
| substream->bytes++; |
| if (runtime->avail < runtime->buffer_size) { |
| runtime->buffer[runtime->hw_ptr++] = buffer[0]; |
| runtime->hw_ptr %= runtime->buffer_size; |
| runtime->avail++; |
| result++; |
| } else { |
| runtime->xruns++; |
| } |
| } else { |
| substream->bytes += count; |
| count1 = runtime->buffer_size - runtime->hw_ptr; |
| if (count1 > count) |
| count1 = count; |
| if (count1 > (int)(runtime->buffer_size - runtime->avail)) |
| count1 = runtime->buffer_size - runtime->avail; |
| memcpy(runtime->buffer + runtime->hw_ptr, buffer, count1); |
| runtime->hw_ptr += count1; |
| runtime->hw_ptr %= runtime->buffer_size; |
| runtime->avail += count1; |
| count -= count1; |
| result += count1; |
| if (count > 0) { |
| buffer += count1; |
| count1 = count; |
| if (count1 > (int)(runtime->buffer_size - runtime->avail)) { |
| count1 = runtime->buffer_size - runtime->avail; |
| runtime->xruns += count - count1; |
| } |
| if (count1 > 0) { |
| memcpy(runtime->buffer, buffer, count1); |
| runtime->hw_ptr = count1; |
| runtime->avail += count1; |
| result += count1; |
| } |
| } |
| } |
| if (result > 0) { |
| if (runtime->event) |
| tasklet_hi_schedule(&runtime->tasklet); |
| else if (snd_rawmidi_ready(substream)) |
| wake_up(&runtime->sleep); |
| } |
| spin_unlock_irqrestore(&runtime->lock, flags); |
| return result; |
| } |
| |
| static long snd_rawmidi_kernel_read1(struct snd_rawmidi_substream *substream, |
| unsigned char *buf, long count, int kernel) |
| { |
| unsigned long flags; |
| long result = 0, count1; |
| struct snd_rawmidi_runtime *runtime = substream->runtime; |
| |
| while (count > 0 && runtime->avail) { |
| count1 = runtime->buffer_size - runtime->appl_ptr; |
| if (count1 > count) |
| count1 = count; |
| spin_lock_irqsave(&runtime->lock, flags); |
| if (count1 > (int)runtime->avail) |
| count1 = runtime->avail; |
| if (kernel) { |
| memcpy(buf + result, runtime->buffer + runtime->appl_ptr, count1); |
| } else { |
| spin_unlock_irqrestore(&runtime->lock, flags); |
| if (copy_to_user((char __user *)buf + result, |
| runtime->buffer + runtime->appl_ptr, count1)) { |
| return result > 0 ? result : -EFAULT; |
| } |
| spin_lock_irqsave(&runtime->lock, flags); |
| } |
| runtime->appl_ptr += count1; |
| runtime->appl_ptr %= runtime->buffer_size; |
| runtime->avail -= count1; |
| spin_unlock_irqrestore(&runtime->lock, flags); |
| result += count1; |
| count -= count1; |
| } |
| return result; |
| } |
| |
| long snd_rawmidi_kernel_read(struct snd_rawmidi_substream *substream, |
| unsigned char *buf, long count) |
| { |
| snd_rawmidi_input_trigger(substream, 1); |
| return snd_rawmidi_kernel_read1(substream, buf, count, 1); |
| } |
| |
| static ssize_t snd_rawmidi_read(struct file *file, char __user *buf, size_t count, |
| loff_t *offset) |
| { |
| long result; |
| int count1; |
| struct snd_rawmidi_file *rfile; |
| struct snd_rawmidi_substream *substream; |
| struct snd_rawmidi_runtime *runtime; |
| |
| rfile = file->private_data; |
| substream = rfile->input; |
| if (substream == NULL) |
| return -EIO; |
| runtime = substream->runtime; |
| snd_rawmidi_input_trigger(substream, 1); |
| result = 0; |
| while (count > 0) { |
| spin_lock_irq(&runtime->lock); |
| while (!snd_rawmidi_ready(substream)) { |
| wait_queue_t wait; |
| if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { |
| spin_unlock_irq(&runtime->lock); |
| return result > 0 ? result : -EAGAIN; |
| } |
| init_waitqueue_entry(&wait, current); |
| add_wait_queue(&runtime->sleep, &wait); |
| set_current_state(TASK_INTERRUPTIBLE); |
| spin_unlock_irq(&runtime->lock); |
| schedule(); |
| remove_wait_queue(&runtime->sleep, &wait); |
| if (signal_pending(current)) |
| return result > 0 ? result : -ERESTARTSYS; |
| if (!runtime->avail) |
| return result > 0 ? result : -EIO; |
| spin_lock_irq(&runtime->lock); |
| } |
| spin_unlock_irq(&runtime->lock); |
| count1 = snd_rawmidi_kernel_read1(substream, |
| (unsigned char __force *)buf, |
| count, 0); |
| if (count1 < 0) |
| return result > 0 ? result : count1; |
| result += count1; |
| buf += count1; |
| count -= count1; |
| } |
| return result; |
| } |
| |
| /** |
| * snd_rawmidi_transmit_empty - check whether the output buffer is empty |
| * @substream: the rawmidi substream |
| * |
| * Returns 1 if the internal output buffer is empty, 0 if not. |
| */ |
| int snd_rawmidi_transmit_empty(struct snd_rawmidi_substream *substream) |
| { |
| struct snd_rawmidi_runtime *runtime = substream->runtime; |
| int result; |
| unsigned long flags; |
| |
| if (runtime->buffer == NULL) { |
| snd_printd("snd_rawmidi_transmit_empty: output is not active!!!\n"); |
| return 1; |
| } |
| spin_lock_irqsave(&runtime->lock, flags); |
| result = runtime->avail >= runtime->buffer_size; |
| spin_unlock_irqrestore(&runtime->lock, flags); |
| return result; |
| } |
| |
| /** |
| * snd_rawmidi_transmit_peek - copy data from the internal buffer |
| * @substream: the rawmidi substream |
| * @buffer: the buffer pointer |
| * @count: data size to transfer |
| * |
| * Copies data from the internal output buffer to the given buffer. |
| * |
| * Call this in the interrupt handler when the midi output is ready, |
| * and call snd_rawmidi_transmit_ack() after the transmission is |
| * finished. |
| * |
| * Returns the size of copied data, or a negative error code on failure. |
| */ |
| int snd_rawmidi_transmit_peek(struct snd_rawmidi_substream *substream, |
| unsigned char *buffer, int count) |
| { |
| unsigned long flags; |
| int result, count1; |
| struct snd_rawmidi_runtime *runtime = substream->runtime; |
| |
| if (runtime->buffer == NULL) { |
| snd_printd("snd_rawmidi_transmit_peek: output is not active!!!\n"); |
| return -EINVAL; |
| } |
| result = 0; |
| spin_lock_irqsave(&runtime->lock, flags); |
| if (runtime->avail >= runtime->buffer_size) { |
| /* warning: lowlevel layer MUST trigger down the hardware */ |
| goto __skip; |
| } |
| if (count == 1) { /* special case, faster code */ |
| *buffer = runtime->buffer[runtime->hw_ptr]; |
| result++; |
| } else { |
| count1 = runtime->buffer_size - runtime->hw_ptr; |
| if (count1 > count) |
| count1 = count; |
| if (count1 > (int)(runtime->buffer_size - runtime->avail)) |
| count1 = runtime->buffer_size - runtime->avail; |
| memcpy(buffer, runtime->buffer + runtime->hw_ptr, count1); |
| count -= count1; |
| result += count1; |
| if (count > 0) { |
| if (count > (int)(runtime->buffer_size - runtime->avail - count1)) |
| count = runtime->buffer_size - runtime->avail - count1; |
| memcpy(buffer + count1, runtime->buffer, count); |
| result += count; |
| } |
| } |
| __skip: |
| spin_unlock_irqrestore(&runtime->lock, flags); |
| return result; |
| } |
| |
| /** |
| * snd_rawmidi_transmit_ack - acknowledge the transmission |
| * @substream: the rawmidi substream |
| * @count: the tranferred count |
| * |
| * Advances the hardware pointer for the internal output buffer with |
| * the given size and updates the condition. |
| * Call after the transmission is finished. |
| * |
| * Returns the advanced size if successful, or a negative error code on failure. |
| */ |
| int snd_rawmidi_transmit_ack(struct snd_rawmidi_substream *substream, int count) |
| { |
| unsigned long flags; |
| struct snd_rawmidi_runtime *runtime = substream->runtime; |
| |
| if (runtime->buffer == NULL) { |
| snd_printd("snd_rawmidi_transmit_ack: output is not active!!!\n"); |
| return -EINVAL; |
| } |
| spin_lock_irqsave(&runtime->lock, flags); |
| snd_assert(runtime->avail + count <= runtime->buffer_size, ); |
| runtime->hw_ptr += count; |
| runtime->hw_ptr %= runtime->buffer_size; |
| runtime->avail += count; |
| substream->bytes += count; |
| if (count > 0) { |
| if (runtime->drain || snd_rawmidi_ready(substream)) |
| wake_up(&runtime->sleep); |
| } |
| spin_unlock_irqrestore(&runtime->lock, flags); |
| return count; |
| } |
| |
| /** |
| * snd_rawmidi_transmit - copy from the buffer to the device |
| * @substream: the rawmidi substream |
| * @buffer: the buffer pointer |
| * @count: the data size to transfer |
| * |
| * Copies data from the buffer to the device and advances the pointer. |
| * |
| * Returns the copied size if successful, or a negative error code on failure. |
| */ |
| int snd_rawmidi_transmit(struct snd_rawmidi_substream *substream, |
| unsigned char *buffer, int count) |
| { |
| count = snd_rawmidi_transmit_peek(substream, buffer, count); |
| if (count < 0) |
| return count; |
| return snd_rawmidi_transmit_ack(substream, count); |
| } |
| |
| static long snd_rawmidi_kernel_write1(struct snd_rawmidi_substream *substream, |
| const unsigned char *buf, long count, int kernel) |
| { |
| unsigned long flags; |
| long count1, result; |
| struct snd_rawmidi_runtime *runtime = substream->runtime; |
| |
| snd_assert(buf != NULL, return -EINVAL); |
| snd_assert(runtime->buffer != NULL, return -EINVAL); |
| |
| result = 0; |
| spin_lock_irqsave(&runtime->lock, flags); |
| if (substream->append) { |
| if ((long)runtime->avail < count) { |
| spin_unlock_irqrestore(&runtime->lock, flags); |
| return -EAGAIN; |
| } |
| } |
| while (count > 0 && runtime->avail > 0) { |
| count1 = runtime->buffer_size - runtime->appl_ptr; |
| if (count1 > count) |
| count1 = count; |
| if (count1 > (long)runtime->avail) |
| count1 = runtime->avail; |
| if (kernel) { |
| memcpy(runtime->buffer + runtime->appl_ptr, buf, count1); |
| } else { |
| spin_unlock_irqrestore(&runtime->lock, flags); |
| if (copy_from_user(runtime->buffer + runtime->appl_ptr, |
| (char __user *)buf, count1)) { |
| spin_lock_irqsave(&runtime->lock, flags); |
| result = result > 0 ? result : -EFAULT; |
| goto __end; |
| } |
| spin_lock_irqsave(&runtime->lock, flags); |
| } |
| runtime->appl_ptr += count1; |
| runtime->appl_ptr %= runtime->buffer_size; |
| runtime->avail -= count1; |
| result += count1; |
| buf += count1; |
| count -= count1; |
| } |
| __end: |
| count1 = runtime->avail < runtime->buffer_size; |
| spin_unlock_irqrestore(&runtime->lock, flags); |
| if (count1) |
| snd_rawmidi_output_trigger(substream, 1); |
| return result; |
| } |
| |
| long snd_rawmidi_kernel_write(struct snd_rawmidi_substream *substream, |
| const unsigned char *buf, long count) |
| { |
| return snd_rawmidi_kernel_write1(substream, buf, count, 1); |
| } |
| |
| static ssize_t snd_rawmidi_write(struct file *file, const char __user *buf, |
| size_t count, loff_t *offset) |
| { |
| long result, timeout; |
| int count1; |
| struct snd_rawmidi_file *rfile; |
| struct snd_rawmidi_runtime *runtime; |
| struct snd_rawmidi_substream *substream; |
| |
| rfile = file->private_data; |
| substream = rfile->output; |
| runtime = substream->runtime; |
| /* we cannot put an atomic message to our buffer */ |
| if (substream->append && count > runtime->buffer_size) |
| return -EIO; |
| result = 0; |
| while (count > 0) { |
| spin_lock_irq(&runtime->lock); |
| while (!snd_rawmidi_ready_append(substream, count)) { |
| wait_queue_t wait; |
| if (file->f_flags & O_NONBLOCK) { |
| spin_unlock_irq(&runtime->lock); |
| return result > 0 ? result : -EAGAIN; |
| } |
| init_waitqueue_entry(&wait, current); |
| add_wait_queue(&runtime->sleep, &wait); |
| set_current_state(TASK_INTERRUPTIBLE); |
| spin_unlock_irq(&runtime->lock); |
| timeout = schedule_timeout(30 * HZ); |
| remove_wait_queue(&runtime->sleep, &wait); |
| if (signal_pending(current)) |
| return result > 0 ? result : -ERESTARTSYS; |
| if (!runtime->avail && !timeout) |
| return result > 0 ? result : -EIO; |
| spin_lock_irq(&runtime->lock); |
| } |
| spin_unlock_irq(&runtime->lock); |
| count1 = snd_rawmidi_kernel_write1(substream, |
| (unsigned char __force *)buf, |
| count, 0); |
| if (count1 < 0) |
| return result > 0 ? result : count1; |
| result += count1; |
| buf += count1; |
| if ((size_t)count1 < count && (file->f_flags & O_NONBLOCK)) |
| break; |
| count -= count1; |
| } |
| if (file->f_flags & O_SYNC) { |
| spin_lock_irq(&runtime->lock); |
| while (runtime->avail != runtime->buffer_size) { |
| wait_queue_t wait; |
| unsigned int last_avail = runtime->avail; |
| init_waitqueue_entry(&wait, current); |
| add_wait_queue(&runtime->sleep, &wait); |
| set_current_state(TASK_INTERRUPTIBLE); |
| spin_unlock_irq(&runtime->lock); |
| timeout = schedule_timeout(30 * HZ); |
| remove_wait_queue(&runtime->sleep, &wait); |
| if (signal_pending(current)) |
| return result > 0 ? result : -ERESTARTSYS; |
| if (runtime->avail == last_avail && !timeout) |
| return result > 0 ? result : -EIO; |
| spin_lock_irq(&runtime->lock); |
| } |
| spin_unlock_irq(&runtime->lock); |
| } |
| return result; |
| } |
| |
| static unsigned int snd_rawmidi_poll(struct file *file, poll_table * wait) |
| { |
| struct snd_rawmidi_file *rfile; |
| struct snd_rawmidi_runtime *runtime; |
| unsigned int mask; |
| |
| rfile = file->private_data; |
| if (rfile->input != NULL) { |
| runtime = rfile->input->runtime; |
| snd_rawmidi_input_trigger(rfile->input, 1); |
| poll_wait(file, &runtime->sleep, wait); |
| } |
| if (rfile->output != NULL) { |
| runtime = rfile->output->runtime; |
| poll_wait(file, &runtime->sleep, wait); |
| } |
| mask = 0; |
| if (rfile->input != NULL) { |
| if (snd_rawmidi_ready(rfile->input)) |
| mask |= POLLIN | POLLRDNORM; |
| } |
| if (rfile->output != NULL) { |
| if (snd_rawmidi_ready(rfile->output)) |
| mask |= POLLOUT | POLLWRNORM; |
| } |
| return mask; |
| } |
| |
| /* |
| */ |
| #ifdef CONFIG_COMPAT |
| #include "rawmidi_compat.c" |
| #else |
| #define snd_rawmidi_ioctl_compat NULL |
| #endif |
| |
| /* |
| |
| */ |
| |
| static void snd_rawmidi_proc_info_read(struct snd_info_entry *entry, |
| struct snd_info_buffer *buffer) |
| { |
| struct snd_rawmidi *rmidi; |
| struct snd_rawmidi_substream *substream; |
| struct snd_rawmidi_runtime *runtime; |
| |
| rmidi = entry->private_data; |
| snd_iprintf(buffer, "%s\n\n", rmidi->name); |
| mutex_lock(&rmidi->open_mutex); |
| if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_OUTPUT) { |
| list_for_each_entry(substream, |
| &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams, |
| list) { |
| snd_iprintf(buffer, |
| "Output %d\n" |
| " Tx bytes : %lu\n", |
| substream->number, |
| (unsigned long) substream->bytes); |
| if (substream->opened) { |
| runtime = substream->runtime; |
| snd_iprintf(buffer, |
| " Mode : %s\n" |
| " Buffer size : %lu\n" |
| " Avail : %lu\n", |
| runtime->oss ? "OSS compatible" : "native", |
| (unsigned long) runtime->buffer_size, |
| (unsigned long) runtime->avail); |
| } |
| } |
| } |
| if (rmidi->info_flags & SNDRV_RAWMIDI_INFO_INPUT) { |
| list_for_each_entry(substream, |
| &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams, |
| list) { |
| snd_iprintf(buffer, |
| "Input %d\n" |
| " Rx bytes : %lu\n", |
| substream->number, |
| (unsigned long) substream->bytes); |
| if (substream->opened) { |
| runtime = substream->runtime; |
| snd_iprintf(buffer, |
| " Buffer size : %lu\n" |
| " Avail : %lu\n" |
| " Overruns : %lu\n", |
| (unsigned long) runtime->buffer_size, |
| (unsigned long) runtime->avail, |
| (unsigned long) runtime->xruns); |
| } |
| } |
| } |
| mutex_unlock(&rmidi->open_mutex); |
| } |
| |
| /* |
| * Register functions |
| */ |
| |
| static const struct file_operations snd_rawmidi_f_ops = |
| { |
| .owner = THIS_MODULE, |
| .read = snd_rawmidi_read, |
| .write = snd_rawmidi_write, |
| .open = snd_rawmidi_open, |
| .release = snd_rawmidi_release, |
| .poll = snd_rawmidi_poll, |
| .unlocked_ioctl = snd_rawmidi_ioctl, |
| .compat_ioctl = snd_rawmidi_ioctl_compat, |
| }; |
| |
| static int snd_rawmidi_alloc_substreams(struct snd_rawmidi *rmidi, |
| struct snd_rawmidi_str *stream, |
| int direction, |
| int count) |
| { |
| struct snd_rawmidi_substream *substream; |
| int idx; |
| |
| for (idx = 0; idx < count; idx++) { |
| substream = kzalloc(sizeof(*substream), GFP_KERNEL); |
| if (substream == NULL) { |
| snd_printk(KERN_ERR "rawmidi: cannot allocate substream\n"); |
| return -ENOMEM; |
| } |
| substream->stream = direction; |
| substream->number = idx; |
| substream->rmidi = rmidi; |
| substream->pstr = stream; |
| list_add_tail(&substream->list, &stream->substreams); |
| stream->substream_count++; |
| } |
| return 0; |
| } |
| |
| /** |
| * snd_rawmidi_new - create a rawmidi instance |
| * @card: the card instance |
| * @id: the id string |
| * @device: the device index |
| * @output_count: the number of output streams |
| * @input_count: the number of input streams |
| * @rrawmidi: the pointer to store the new rawmidi instance |
| * |
| * Creates a new rawmidi instance. |
| * Use snd_rawmidi_set_ops() to set the operators to the new instance. |
| * |
| * Returns zero if successful, or a negative error code on failure. |
| */ |
| int snd_rawmidi_new(struct snd_card *card, char *id, int device, |
| int output_count, int input_count, |
| struct snd_rawmidi ** rrawmidi) |
| { |
| struct snd_rawmidi *rmidi; |
| int err; |
| static struct snd_device_ops ops = { |
| .dev_free = snd_rawmidi_dev_free, |
| .dev_register = snd_rawmidi_dev_register, |
| .dev_disconnect = snd_rawmidi_dev_disconnect, |
| }; |
| |
| snd_assert(rrawmidi != NULL, return -EINVAL); |
| *rrawmidi = NULL; |
| snd_assert(card != NULL, return -ENXIO); |
| rmidi = kzalloc(sizeof(*rmidi), GFP_KERNEL); |
| if (rmidi == NULL) { |
| snd_printk(KERN_ERR "rawmidi: cannot allocate\n"); |
| return -ENOMEM; |
| } |
| rmidi->card = card; |
| rmidi->device = device; |
| mutex_init(&rmidi->open_mutex); |
| init_waitqueue_head(&rmidi->open_wait); |
| INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT].substreams); |
| INIT_LIST_HEAD(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT].substreams); |
| |
| if (id != NULL) |
| strlcpy(rmidi->id, id, sizeof(rmidi->id)); |
| if ((err = snd_rawmidi_alloc_substreams(rmidi, |
| &rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT], |
| SNDRV_RAWMIDI_STREAM_INPUT, |
| input_count)) < 0) { |
| snd_rawmidi_free(rmidi); |
| return err; |
| } |
| if ((err = snd_rawmidi_alloc_substreams(rmidi, |
| &rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT], |
| SNDRV_RAWMIDI_STREAM_OUTPUT, |
| output_count)) < 0) { |
| snd_rawmidi_free(rmidi); |
| return err; |
| } |
| if ((err = snd_device_new(card, SNDRV_DEV_RAWMIDI, rmidi, &ops)) < 0) { |
| snd_rawmidi_free(rmidi); |
| return err; |
| } |
| *rrawmidi = rmidi; |
| return 0; |
| } |
| |
| static void snd_rawmidi_free_substreams(struct snd_rawmidi_str *stream) |
| { |
| struct snd_rawmidi_substream *substream; |
| |
| while (!list_empty(&stream->substreams)) { |
| substream = list_entry(stream->substreams.next, struct snd_rawmidi_substream, list); |
| list_del(&substream->list); |
| kfree(substream); |
| } |
| } |
| |
| static int snd_rawmidi_free(struct snd_rawmidi *rmidi) |
| { |
| snd_assert(rmidi != NULL, return -ENXIO); |
| |
| snd_info_free_entry(rmidi->proc_entry); |
| rmidi->proc_entry = NULL; |
| mutex_lock(®ister_mutex); |
| if (rmidi->ops && rmidi->ops->dev_unregister) |
| rmidi->ops->dev_unregister(rmidi); |
| mutex_unlock(®ister_mutex); |
| |
| snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_INPUT]); |
| snd_rawmidi_free_substreams(&rmidi->streams[SNDRV_RAWMIDI_STREAM_OUTPUT]); |
| if (rmidi->private_free) |
| rmidi->private_free(rmidi); |
| kfree(rmidi); |
| return 0; |
| } |
| |
| static int snd_rawmidi_dev_free(struct snd_device *device) |
| { |
| struct snd_rawmidi *rmidi = device->device_data; |
| return snd_rawmidi_free(rmidi); |
| } |
| |
| #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) |
| static void snd_rawmidi_dev_seq_free(struct snd_seq_device *device) |
| { |
| struct snd_rawmidi *rmidi = device->private_data; |
| rmidi->seq_dev = NULL; |
| } |
| #endif |
| |
| static int snd_rawmidi_dev_register(struct snd_device *device) |
| { |
| int err; |
| struct snd_info_entry *entry; |
| char name[16]; |
| struct snd_rawmidi *rmidi = device->device_data; |
| |
| if (rmidi->device >= SNDRV_RAWMIDI_DEVICES) |
| return -ENOMEM; |
| mutex_lock(®ister_mutex); |
| if (snd_rawmidi_search(rmidi->card, rmidi->device)) { |
| mutex_unlock(®ister_mutex); |
| return -EBUSY; |
| } |
| list_add_tail(&rmidi->list, &snd_rawmidi_devices); |
| sprintf(name, "midiC%iD%i", rmidi->card->number, rmidi->device); |
| if ((err = snd_register_device(SNDRV_DEVICE_TYPE_RAWMIDI, |
| rmidi->card, rmidi->device, |
| &snd_rawmidi_f_ops, rmidi, name)) < 0) { |
| snd_printk(KERN_ERR "unable to register rawmidi device %i:%i\n", rmidi->card->number, rmidi->device); |
| list_del(&rmidi->list); |
| mutex_unlock(®ister_mutex); |
| return err; |
| } |
| if (rmidi->ops && rmidi->ops->dev_register && |
| (err = rmidi->ops->dev_register(rmidi)) < 0) { |
| snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device); |
| list_del(&rmidi->list); |
| mutex_unlock(®ister_mutex); |
| return err; |
| } |
| #ifdef CONFIG_SND_OSSEMUL |
| rmidi->ossreg = 0; |
| if ((int)rmidi->device == midi_map[rmidi->card->number]) { |
| if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, |
| rmidi->card, 0, &snd_rawmidi_f_ops, |
| rmidi, name) < 0) { |
| snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 0); |
| } else { |
| rmidi->ossreg++; |
| #ifdef SNDRV_OSS_INFO_DEV_MIDI |
| snd_oss_info_register(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number, rmidi->name); |
| #endif |
| } |
| } |
| if ((int)rmidi->device == amidi_map[rmidi->card->number]) { |
| if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, |
| rmidi->card, 1, &snd_rawmidi_f_ops, |
| rmidi, name) < 0) { |
| snd_printk(KERN_ERR "unable to register OSS rawmidi device %i:%i\n", rmidi->card->number, 1); |
| } else { |
| rmidi->ossreg++; |
| } |
| } |
| #endif /* CONFIG_SND_OSSEMUL */ |
| mutex_unlock(®ister_mutex); |
| sprintf(name, "midi%d", rmidi->device); |
| entry = snd_info_create_card_entry(rmidi->card, name, rmidi->card->proc_root); |
| if (entry) { |
| entry->private_data = rmidi; |
| entry->c.text.read = snd_rawmidi_proc_info_read; |
| if (snd_info_register(entry) < 0) { |
| snd_info_free_entry(entry); |
| entry = NULL; |
| } |
| } |
| rmidi->proc_entry = entry; |
| #if defined(CONFIG_SND_SEQUENCER) || (defined(MODULE) && defined(CONFIG_SND_SEQUENCER_MODULE)) |
| if (!rmidi->ops || !rmidi->ops->dev_register) { /* own registration mechanism */ |
| if (snd_seq_device_new(rmidi->card, rmidi->device, SNDRV_SEQ_DEV_ID_MIDISYNTH, 0, &rmidi->seq_dev) >= 0) { |
| rmidi->seq_dev->private_data = rmidi; |
| rmidi->seq_dev->private_free = snd_rawmidi_dev_seq_free; |
| sprintf(rmidi->seq_dev->name, "MIDI %d-%d", rmidi->card->number, rmidi->device); |
| snd_device_register(rmidi->card, rmidi->seq_dev); |
| } |
| } |
| #endif |
| return 0; |
| } |
| |
| static int snd_rawmidi_dev_disconnect(struct snd_device *device) |
| { |
| struct snd_rawmidi *rmidi = device->device_data; |
| |
| mutex_lock(®ister_mutex); |
| list_del_init(&rmidi->list); |
| #ifdef CONFIG_SND_OSSEMUL |
| if (rmidi->ossreg) { |
| if ((int)rmidi->device == midi_map[rmidi->card->number]) { |
| snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 0); |
| #ifdef SNDRV_OSS_INFO_DEV_MIDI |
| snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_MIDI, rmidi->card->number); |
| #endif |
| } |
| if ((int)rmidi->device == amidi_map[rmidi->card->number]) |
| snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_MIDI, rmidi->card, 1); |
| rmidi->ossreg = 0; |
| } |
| #endif /* CONFIG_SND_OSSEMUL */ |
| snd_unregister_device(SNDRV_DEVICE_TYPE_RAWMIDI, rmidi->card, rmidi->device); |
| mutex_unlock(®ister_mutex); |
| return 0; |
| } |
| |
| /** |
| * snd_rawmidi_set_ops - set the rawmidi operators |
| * @rmidi: the rawmidi instance |
| * @stream: the stream direction, SNDRV_RAWMIDI_STREAM_XXX |
| * @ops: the operator table |
| * |
| * Sets the rawmidi operators for the given stream direction. |
| */ |
| void snd_rawmidi_set_ops(struct snd_rawmidi *rmidi, int stream, |
| struct snd_rawmidi_ops *ops) |
| { |
| struct snd_rawmidi_substream *substream; |
| |
| list_for_each_entry(substream, &rmidi->streams[stream].substreams, list) |
| substream->ops = ops; |
| } |
| |
| /* |
| * ENTRY functions |
| */ |
| |
| static int __init alsa_rawmidi_init(void) |
| { |
| |
| snd_ctl_register_ioctl(snd_rawmidi_control_ioctl); |
| snd_ctl_register_ioctl_compat(snd_rawmidi_control_ioctl); |
| #ifdef CONFIG_SND_OSSEMUL |
| { int i; |
| /* check device map table */ |
| for (i = 0; i < SNDRV_CARDS; i++) { |
| if (midi_map[i] < 0 || midi_map[i] >= SNDRV_RAWMIDI_DEVICES) { |
| snd_printk(KERN_ERR "invalid midi_map[%d] = %d\n", i, midi_map[i]); |
| midi_map[i] = 0; |
| } |
| if (amidi_map[i] < 0 || amidi_map[i] >= SNDRV_RAWMIDI_DEVICES) { |
| snd_printk(KERN_ERR "invalid amidi_map[%d] = %d\n", i, amidi_map[i]); |
| amidi_map[i] = 1; |
| } |
| } |
| } |
| #endif /* CONFIG_SND_OSSEMUL */ |
| return 0; |
| } |
| |
| static void __exit alsa_rawmidi_exit(void) |
| { |
| snd_ctl_unregister_ioctl(snd_rawmidi_control_ioctl); |
| snd_ctl_unregister_ioctl_compat(snd_rawmidi_control_ioctl); |
| } |
| |
| module_init(alsa_rawmidi_init) |
| module_exit(alsa_rawmidi_exit) |
| |
| EXPORT_SYMBOL(snd_rawmidi_output_params); |
| EXPORT_SYMBOL(snd_rawmidi_input_params); |
| EXPORT_SYMBOL(snd_rawmidi_drop_output); |
| EXPORT_SYMBOL(snd_rawmidi_drain_output); |
| EXPORT_SYMBOL(snd_rawmidi_drain_input); |
| EXPORT_SYMBOL(snd_rawmidi_receive); |
| EXPORT_SYMBOL(snd_rawmidi_transmit_empty); |
| EXPORT_SYMBOL(snd_rawmidi_transmit_peek); |
| EXPORT_SYMBOL(snd_rawmidi_transmit_ack); |
| EXPORT_SYMBOL(snd_rawmidi_transmit); |
| EXPORT_SYMBOL(snd_rawmidi_new); |
| EXPORT_SYMBOL(snd_rawmidi_set_ops); |
| EXPORT_SYMBOL(snd_rawmidi_info_select); |
| EXPORT_SYMBOL(snd_rawmidi_kernel_open); |
| EXPORT_SYMBOL(snd_rawmidi_kernel_release); |
| EXPORT_SYMBOL(snd_rawmidi_kernel_read); |
| EXPORT_SYMBOL(snd_rawmidi_kernel_write); |