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| author | Michael Brown <mcb30@ipxe.org> | 2024-10-18 13:13:28 +0100 |
|---|---|---|
| committer | Michael Brown <mcb30@ipxe.org> | 2024-10-18 13:13:51 +0100 |
| commit | c69f9589cc7543baba08dbabdb5c30104fadaa34 (patch) | |
| tree | 15cb64369c6f7e50a399c5b43e7b1a3b917ee028 /src/include/ipxe/errfile.h | |
| parent | c219b5d8a9536cc87e9c53e8389e59c706ba3f8e (diff) | |
| download | ipxe-c69f9589cc7543baba08dbabdb5c30104fadaa34.tar.gz | |
[usb] Expose USB device descriptor and strings via settings
Allow scripts to read basic information from USB device descriptors
via the settings mechanism. For example:
echo USB vendor ID: ${usb/${busloc}.8.2}
echo USB device ID: ${usb/${busloc}.10.2}
echo USB manufacturer name: ${usb/${busloc}.14.0}
The general syntax is
usb/<bus:dev>.<offset>.<length>
where bus:dev is the USB bus:device address (as obtained via the
"usbscan" command, or from e.g. ${net0/busloc} for a USB network
device), and <offset> and <length> select the required portion of the
USB device descriptor.
Following the usage of SMBIOS settings tags, a <length> of zero may be
used to indicate that the byte at <offset> contains a USB string
descriptor index, and an <offset> of zero may be used to indicate that
the <length> contains a literal USB string descriptor index.
Since the byte at offset zero can never contain a string index, and a
literal string index can never be zero, the combination of both
<length> and <offset> being zero may be used to indicate that the
entire device descriptor is to be read as a raw hex dump.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/include/ipxe/errfile.h')
| -rw-r--r-- | src/include/ipxe/errfile.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/src/include/ipxe/errfile.h b/src/include/ipxe/errfile.h index 01a2be654..6183e5b7e 100644 --- a/src/include/ipxe/errfile.h +++ b/src/include/ipxe/errfile.h @@ -424,6 +424,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); #define ERRFILE_widget_ui ( ERRFILE_OTHER | 0x00620000 ) #define ERRFILE_form_ui ( ERRFILE_OTHER | 0x00630000 ) #define ERRFILE_usb_cmd ( ERRFILE_OTHER | 0x00640000 ) +#define ERRFILE_usb_settings ( ERRFILE_OTHER | 0x00650000 ) /** @} */ |