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| author | Jinjian Song <jinjian.song@fibocom.com> | 2024-02-05 18:22:30 +0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2024-02-09 12:07:48 +0000 |
| commit | 2dac6381c3da50d4b2525fd0514e41e8041ad974 (patch) | |
| tree | 827a7808fcb9fb3cc5999f31f473c8687f2207a6 /Documentation | |
| parent | d27553c14f06f4db61cb9ddaf88e8d4df91d740c (diff) | |
| download | lwn-2dac6381c3da50d4b2525fd0514e41e8041ad974.tar.gz lwn-2dac6381c3da50d4b2525fd0514e41e8041ad974.zip | |
net: wwan: t7xx: Add fastboot WWAN port
On early detection of wwan device in fastboot mode, driver sets
up CLDMA0 HW tx/rx queues for raw data transfer and then create
fastboot port to userspace.
Application can use this port to flash firmware and collect
core dump by fastboot protocol commands.
E.g., flash firmware through fastboot port:
- "download:%08x": write data to memory with the download size.
- "flash:%s": write the previously downloaded image to the named partition.
- "reboot": reboot the device.
Link: https://android.googlesource.com/platform/system/core/+/refs/heads/main/fastboot/README.md
Signed-off-by: Jinjian Song <jinjian.song@fibocom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/networking/device_drivers/wwan/t7xx.rst | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/Documentation/networking/device_drivers/wwan/t7xx.rst b/Documentation/networking/device_drivers/wwan/t7xx.rst index 8429b9927341..f346f5f85f15 100644 --- a/Documentation/networking/device_drivers/wwan/t7xx.rst +++ b/Documentation/networking/device_drivers/wwan/t7xx.rst @@ -125,6 +125,20 @@ The driver exposes an AT port by implementing AT WWAN Port. The userspace end of the control port is a /dev/wwan0at0 character device. Application shall use this interface to issue AT commands. +fastboot port userspace ABI +--------------------------- + +/dev/wwan0fastboot0 character device +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ +The driver exposes a fastboot protocol interface by implementing +fastboot WWAN Port. The userspace end of the fastboot channel pipe is a +/dev/wwan0fastboot0 character device. Application shall use this interface for +fastboot protocol communication. + +Please note that driver needs to be reloaded to export /dev/wwan0fastboot0 +port, because device needs a cold reset after enter ``fastboot_switching`` +mode. + The MediaTek's T700 modem supports the 3GPP TS 27.007 [4] specification. References @@ -146,3 +160,7 @@ speak the Mobile Interface Broadband Model (MBIM) protocol"* [4] *Specification # 27.007 - 3GPP* - https://www.3gpp.org/DynaReport/27007.htm + +[5] *fastboot "a mechanism for communicating with bootloaders"* + +- https://android.googlesource.com/platform/system/core/+/refs/heads/main/fastboot/README.md |