diff options
| author | Nicolas Boichat <drinkcat@chromium.org> | 2017-11-09 16:35:53 -0800 |
|---|---|---|
| committer | chrome-bot <chrome-bot@chromium.org> | 2017-11-14 03:22:31 -0800 |
| commit | 7fdcb8bf869b59396b8e2c0844c31fefd4c22500 (patch) | |
| tree | 40ca79851751dfadde6bbf0ab747073b7fba4cc3 /include/update_fw.h | |
| parent | b3c99868026675a619ba1d323bc06ea2b5141674 (diff) | |
| download | chrome-ec-7fdcb8bf869b59396b8e2c0844c31fefd4c22500.tar.gz | |
usb_update: Add support for touchpad debugging feature
We support touchpad-specific debugging feature over the USB update
protocol. This will be used to fetch raw data from the sensor,
without requiring to remove the write-protect screw.
BRANCH=none
BUG=b:63993891
TEST=./usb_updater2 -g 00 -d 18d1:502b
Change-Id: I46dfd97aaa17b73a5893fe1e8c62327a302f829b
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/763574
Reviewed-by: Chun-ta Lin <itspeter@chromium.org>
Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
Diffstat (limited to 'include/update_fw.h')
| -rw-r--r-- | include/update_fw.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/update_fw.h b/include/update_fw.h index f31549e252..727a3012f5 100644 --- a/include/update_fw.h +++ b/include/update_fw.h @@ -165,6 +165,7 @@ enum update_extra_command { UPDATE_EXTRA_CMD_INJECT_ENTROPY = 5, UPDATE_EXTRA_CMD_PAIR_CHALLENGE = 6, UPDATE_EXTRA_CMD_TOUCHPAD_INFO = 7, + UPDATE_EXTRA_CMD_TOUCHPAD_DEBUG = 8, }; /* @@ -247,6 +248,23 @@ int touchpad_get_info(struct touchpad_info *tp); /* Touchpad FW update: Write a FW block. */ int touchpad_update_write(int offset, int size, const uint8_t *data); +/** + * Touchpad debugging interface, called whenever UPDATE_EXTRA_CMD_TOUCHPAD_DEBUG + * is received. Behaviour is touchpad-vendor dependent, with the following + * restrictions: data must be allocated statically, and must not be larger than + * 64 bytes. + * + * @param param Data passed as parameter to command. + * @param param_size Number of bytes passed as parameter. + * @param data Data to write back to host, needs to be allocated + * statically by touchpad handler. + * @param data_size Amount of data to write back to host (up to 64 bytes). + * + * @return EC_RES_SUCCESS on success, any other EC_RES_* status on error. + */ +int touchpad_debug(const uint8_t *param, unsigned int param_size, + uint8_t **data, unsigned int *data_size); + /* SHA256 hash of the touchpad firmware expected by this image. */ extern const uint8_t touchpad_fw_full_hash[32]; |