1usb_ac(7D) Devices usb_ac(7D)
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6 usb_ac - USB audio control driver
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9 sound-control@unit-address
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13 The usb_ac driver is a USBA (Solaris USB Architecture) compliant client
14 driver that supports the USB Audio Class 1.0 specification.
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17 The audio control driver is a USB class driver and offers functionality
18 similar to the audiocs (sun4u) and audiots (Sun Blade 100) drivers
19 which use the Solaris audio mixer framework (mixer(7I)). Unlike the
20 audiocs and audiots drivers, the USB audio device can have play-only or
21 record-only capability.
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24 Drivers corresponding to other USB audio interfaces on the device,
25 including the usb_as(7D) audio streaming driver or the hid(7D) driver,
26 are plumbed under the USB audio control driver and do not directly
27 interface with user applications.
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30 The usb_ac driver supports USB audio class compliant devices with a
31 feature unit.
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34 If a device is hot-removed while it is active, all subsequent opens
35 returns EIO. All other errors are defined in the audio(7I) man page.
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38 /kernel/drv/usb_ac 32-bit x86 ELF kernel module
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41 /kernel/drv/amd64/usb_ac 64-bit x86 ELF kernel module
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44 /kernel/drv/sparcv9/usb_ac 64-bit SPARC ELF kernel module.
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47 /kernel/drv/usb_ac.conf USB audio driver configuration file.
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51 See attributes(5) for descriptions of the following attributes:
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56 ┌─────────────────────────────┬──────────────────────────────┐
57 │ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
58 ├─────────────────────────────┼──────────────────────────────┤
59 │Architecture │SPARC, x86, PCI-based systems │
60 ├─────────────────────────────┼──────────────────────────────┤
61 │Availability │SUNWusb │
62 ├─────────────────────────────┼──────────────────────────────┤
63 │Interface Stability │Uncommitted │
64 └─────────────────────────────┴──────────────────────────────┘
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67 cfgadm_usb(1M), ioctl(2), attributes(5), hid(7D), usba(7D), usb_as(7D),
68 audio(7I), mixer(7I), streamio(7I), usb_ah(7M)
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71 Writing Device Drivers
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74 Universal Serial Bus Specification 1.0 and 1.1
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77 Universal Serial Bus Device Class Definition for Audio Devices, Release
78 1.0
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81 System Administration: Basic Administration
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84 In addition to being logged, the following messages can appear on the
85 system console. All messages are formatted in the following manner:
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87 Warning: <device path> (usb_ac<instance num>): Error Message...
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91 Failure to plumb audio streams drivers.
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93 The usb audio streaming driver or the hid driver could not be
94 plumbed under the audio control driver and the device is not
95 usable.
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100SunOS 5.11 13 May 2009 usb_ac(7D)