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f90c06a2b6
When compiled with CONFIG_SND_DYNAMIC_MINORS the ALSA core is fine to have more than 8 PCM devices per card, except one place - the SNDRV_CTL_IOCTL_PCM_NEXT_DEVICE ioctl, which will not enumerate devices > 7. This patch fixes the issue, changing the devices list organisation. Instead of adding new device to the tail, the list is now kept always ordered (by card number, then device number). Thus, during enumeration, it is easy to discover the fact that there is no more given card's devices. Additionally the device field of struct snd_pcm had to be changed to int, as its "unsignednity" caused a lot of problems when comparing it to potentially negative signed values. (-1 is 0xffffffff or even more then ;-) Signed-off-by: Pawel Moll <pawel.moll@st.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
111 lines
4.2 KiB
C
111 lines
4.2 KiB
C
#ifndef __SOUND_MINORS_H
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#define __SOUND_MINORS_H
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/*
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* MINOR numbers
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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*/
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#define SNDRV_OS_MINORS 256
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#define SNDRV_MINOR_DEVICES 32
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#define SNDRV_MINOR_CARD(minor) ((minor) >> 5)
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#define SNDRV_MINOR_DEVICE(minor) ((minor) & 0x001f)
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#define SNDRV_MINOR(card, dev) (((card) << 5) | (dev))
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/* these minors can still be used for autoloading devices (/dev/aload*) */
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#define SNDRV_MINOR_CONTROL 0 /* 0 */
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#define SNDRV_MINOR_GLOBAL 1 /* 1 */
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#define SNDRV_MINOR_SEQUENCER (SNDRV_MINOR_GLOBAL + 0 * 32)
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#define SNDRV_MINOR_TIMER (SNDRV_MINOR_GLOBAL + 1 * 32)
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#ifndef CONFIG_SND_DYNAMIC_MINORS
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/* 2 - 3 (reserved) */
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#define SNDRV_MINOR_HWDEP 4 /* 4 - 7 */
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#define SNDRV_MINOR_RAWMIDI 8 /* 8 - 15 */
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#define SNDRV_MINOR_PCM_PLAYBACK 16 /* 16 - 23 */
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#define SNDRV_MINOR_PCM_CAPTURE 24 /* 24 - 31 */
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/* same as first respective minor number to make minor allocation easier */
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#define SNDRV_DEVICE_TYPE_CONTROL SNDRV_MINOR_CONTROL
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#define SNDRV_DEVICE_TYPE_HWDEP SNDRV_MINOR_HWDEP
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#define SNDRV_DEVICE_TYPE_RAWMIDI SNDRV_MINOR_RAWMIDI
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#define SNDRV_DEVICE_TYPE_PCM_PLAYBACK SNDRV_MINOR_PCM_PLAYBACK
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#define SNDRV_DEVICE_TYPE_PCM_CAPTURE SNDRV_MINOR_PCM_CAPTURE
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#define SNDRV_DEVICE_TYPE_SEQUENCER SNDRV_MINOR_SEQUENCER
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#define SNDRV_DEVICE_TYPE_TIMER SNDRV_MINOR_TIMER
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#else /* CONFIG_SND_DYNAMIC_MINORS */
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enum {
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SNDRV_DEVICE_TYPE_CONTROL,
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SNDRV_DEVICE_TYPE_SEQUENCER,
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SNDRV_DEVICE_TYPE_TIMER,
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SNDRV_DEVICE_TYPE_HWDEP,
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SNDRV_DEVICE_TYPE_RAWMIDI,
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SNDRV_DEVICE_TYPE_PCM_PLAYBACK,
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SNDRV_DEVICE_TYPE_PCM_CAPTURE,
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};
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#endif /* CONFIG_SND_DYNAMIC_MINORS */
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#define SNDRV_MINOR_HWDEPS 4
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#define SNDRV_MINOR_RAWMIDIS 8
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#define SNDRV_MINOR_PCMS 8
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#ifdef CONFIG_SND_OSSEMUL
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#define SNDRV_MINOR_OSS_DEVICES 16
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#define SNDRV_MINOR_OSS_CARD(minor) ((minor) >> 4)
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#define SNDRV_MINOR_OSS_DEVICE(minor) ((minor) & 0x000f)
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#define SNDRV_MINOR_OSS(card, dev) (((card) << 4) | (dev))
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#define SNDRV_MINOR_OSS_MIXER 0 /* /dev/mixer - OSS 3.XX compatible */
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#define SNDRV_MINOR_OSS_SEQUENCER 1 /* /dev/sequencer - OSS 3.XX compatible */
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#define SNDRV_MINOR_OSS_MIDI 2 /* /dev/midi - native midi interface - OSS 3.XX compatible - UART */
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#define SNDRV_MINOR_OSS_PCM 3 /* alias */
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#define SNDRV_MINOR_OSS_PCM_8 3 /* /dev/dsp - 8bit PCM - OSS 3.XX compatible */
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#define SNDRV_MINOR_OSS_AUDIO 4 /* /dev/audio - SunSparc compatible */
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#define SNDRV_MINOR_OSS_PCM_16 5 /* /dev/dsp16 - 16bit PCM - OSS 3.XX compatible */
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#define SNDRV_MINOR_OSS_SNDSTAT 6 /* /dev/sndstat - for compatibility with OSS */
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#define SNDRV_MINOR_OSS_RESERVED7 7 /* reserved for future use */
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#define SNDRV_MINOR_OSS_MUSIC 8 /* /dev/music - OSS 3.XX compatible */
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#define SNDRV_MINOR_OSS_DMMIDI 9 /* /dev/dmmidi0 - this device can have another minor # with OSS */
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#define SNDRV_MINOR_OSS_DMFM 10 /* /dev/dmfm0 - this device can have another minor # with OSS */
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#define SNDRV_MINOR_OSS_MIXER1 11 /* alternate mixer */
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#define SNDRV_MINOR_OSS_PCM1 12 /* alternate PCM (GF-A-1) */
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#define SNDRV_MINOR_OSS_MIDI1 13 /* alternate midi - SYNTH */
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#define SNDRV_MINOR_OSS_DMMIDI1 14 /* alternate dmmidi - SYNTH */
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#define SNDRV_MINOR_OSS_RESERVED15 15 /* reserved for future use */
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#define SNDRV_OSS_DEVICE_TYPE_MIXER 0
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#define SNDRV_OSS_DEVICE_TYPE_SEQUENCER 1
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#define SNDRV_OSS_DEVICE_TYPE_PCM 2
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#define SNDRV_OSS_DEVICE_TYPE_MIDI 3
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#define SNDRV_OSS_DEVICE_TYPE_DMFM 4
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#define SNDRV_OSS_DEVICE_TYPE_SNDSTAT 5
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#define SNDRV_OSS_DEVICE_TYPE_MUSIC 6
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#define MODULE_ALIAS_SNDRV_MINOR(type) \
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MODULE_ALIAS("sound-service-?-" __stringify(type))
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#endif
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#endif /* __SOUND_MINORS_H */
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