78 lines
3.4 KiB
Plaintext
78 lines
3.4 KiB
Plaintext
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What: /sys/class/firmware/.../data
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Date: July 2022
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KernelVersion: 5.19
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Contact: Russ Weight <russell.h.weight@intel.com>
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Description: The data sysfs file is used for firmware-fallback and for
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firmware uploads. Cat a firmware image to this sysfs file
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after you echo 1 to the loading sysfs file. When the firmware
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image write is complete, echo 0 to the loading sysfs file. This
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sequence will signal the completion of the firmware write and
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signal the lower-level driver that the firmware data is
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available.
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What: /sys/class/firmware/.../cancel
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Date: July 2022
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KernelVersion: 5.19
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Contact: Russ Weight <russell.h.weight@intel.com>
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Description: Write-only. For firmware uploads, write a "1" to this file to
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request that the transfer of firmware data to the lower-level
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device be canceled. This request will be rejected (EBUSY) if
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the update cannot be canceled (e.g. a FLASH write is in
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progress) or (ENODEV) if there is no firmware update in progress.
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What: /sys/class/firmware/.../error
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Date: July 2022
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KernelVersion: 5.19
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Contact: Russ Weight <russell.h.weight@intel.com>
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Description: Read-only. Returns a string describing a failed firmware
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upload. This string will be in the form of <STATUS>:<ERROR>,
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where <STATUS> will be one of the status strings described
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for the status sysfs file and <ERROR> will be one of the
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following: "hw-error", "timeout", "user-abort", "device-busy",
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"invalid-file-size", "read-write-error", "flash-wearout". The
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error sysfs file is only meaningful when the current firmware
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upload status is "idle". If this file is read while a firmware
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transfer is in progress, then the read will fail with EBUSY.
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What: /sys/class/firmware/.../loading
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Date: July 2022
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KernelVersion: 5.19
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Contact: Russ Weight <russell.h.weight@intel.com>
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Description: The loading sysfs file is used for both firmware-fallback and
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for firmware uploads. Echo 1 onto the loading file to indicate
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you are writing a firmware file to the data sysfs node. Echo
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-1 onto this file to abort the data write or echo 0 onto this
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file to indicate that the write is complete. For firmware
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uploads, the zero value also triggers the transfer of the
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firmware data to the lower-level device driver.
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What: /sys/class/firmware/.../remaining_size
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Date: July 2022
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KernelVersion: 5.19
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Contact: Russ Weight <russell.h.weight@intel.com>
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Description: Read-only. For firmware upload, this file contains the size
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of the firmware data that remains to be transferred to the
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lower-level device driver. The size value is initialized to
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the full size of the firmware image that was previously
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written to the data sysfs file. This value is periodically
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updated during the "transferring" phase of the firmware
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upload.
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Format: "%u".
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What: /sys/class/firmware/.../status
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Date: July 2022
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KernelVersion: 5.19
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Contact: Russ Weight <russell.h.weight@intel.com>
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Description: Read-only. Returns a string describing the current status of
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a firmware upload. The string will be one of the following:
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idle, "receiving", "preparing", "transferring", "programming".
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What: /sys/class/firmware/.../timeout
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Date: July 2022
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KernelVersion: 5.19
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Contact: Russ Weight <russell.h.weight@intel.com>
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Description: This file supports the timeout mechanism for firmware
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fallback. This file has no affect on firmware uploads. For
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more information on timeouts please see the documentation
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for firmware fallback.
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