1usb_as(7D) Devices usb_as(7D)
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6 usb_as - USB audio streaming driver
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9 sound@unit-address
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13 The usb_as 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 usb_as driver processes audio data messages during play and record
18 and sets sample frequency, precision, encoding and other functions on
19 request from the USB audio control driver. See usb_ac(7D).
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22 This driver is plumbed under the USB audio control driver and does not
23 directly interface with the user application.
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26 /kernel/drv/usb_as 32-bit x86 ELF kernel module
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29 /kernel/drv/amd64/usb_as 64-bit x86 ELF kernel module
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32 /kernel/drv/sparcv9/usb_as 64-bit SPARC ELF kernel module
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36 See attributes(5) for descriptions of the following attributes:
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41 ┌─────────────────────────────┬──────────────────────────────┐
42 │ ATTRIBUTE TYPE │ ATTRIBUTE VALUE │
43 ├─────────────────────────────┼──────────────────────────────┤
44 │Architecture │SPARC, x86, PCI-based systems │
45 ├─────────────────────────────┼──────────────────────────────┤
46 │Availability │SUNWusb │
47 ├─────────────────────────────┼──────────────────────────────┤
48 │Stability level │Committed │
49 └─────────────────────────────┴──────────────────────────────┘
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52 attributes(5), usba(7D), usb_ac(7D), audio(7I)
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55 Writing Device Drivers
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58 Universal Serial Bus Specification 1.0 and 1.1
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61 System Administration Guide: Basic Administration
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64 In addition to being logged, the following messages can appear on the
65 system console. All messages are formatted in the following manner:
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67 Warning: <device path> (usb_as<instance num>): Error Message...
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72 where <device path> is the physical path to the device in /devices
73 directory.
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75 No bandwidth available.
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77 There is no bandwidth available for the isochronous pipe. As a
78 result, no data is transferred during play and record.
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81 Operating a full/high speed audio device on a high speed port is not
82 supported.
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84 The USB software does not currently support full or high speed
85 audio devices connected to an external USB 2.0 hub that is linked
86 to a port of a USB 2.0 host controller. Audio devices must be con‐
87 nected directly to a port of a USB 2.0 controller or to any USB 1.1
88 port.
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91 Cannot access device. Please reconnect <name>.
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93 There was an error in accessing the device during reconnect. Please
94 reconnect the device.
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97 Device is not identical to the previous one on this port. Please dis‐
98 connect and reconnect.
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100 A USB audio streaming interface was hot-removed while open. A new
101 device was hot-inserted which is not identical to the original USB
102 audio device. Please disconnect the USB device and reconnect the
103 device to the same port.
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107 The USB audio streaming interface is power managed if the device is
108 idle.
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112SunOS 5.11 15 May 2009 usb_as(7D)