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| author | Shecky Lin <sheckylin@chromium.org> | 2020-03-11 15:25:53 +0800 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2020-03-17 12:11:48 +0000 |
| commit | 1499ed62a817db87a6cee635fa3c409b323d6ebf (patch) | |
| tree | 9d0d1292aee2aff318617d4f2290809c3d2221ef /include/i2c_hid_touchpad.h | |
| parent | c6f631c3e461cdafe5b643fa5d12415d67097ac6 (diff) | |
| download | chrome-ec-1499ed62a817db87a6cee635fa3c409b323d6ebf.tar.gz | |
i2c_hid_touchpad: Add init and request handlers
This is part of a chain to add a common I2C HID interface for
touchpads.
The CL adds an init function for I2C HID touchpad and implements
a handler that can process I2C HID requests from the host.
BUG=chromium:1008568
BRANCH=none
TEST=Build and run on MCU to forward touchpad events to host
through I2C HID.
Signed-off-by: Shecky Lin <sheckylin@chromium.org>
Cq-Depend: chromium:2094927
Change-Id: I58d46031396976eb3bf02e1b5516e92a9cd88ed4
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2094928
Reviewed-by: Nicolas Boichat <drinkcat@chromium.org>
Diffstat (limited to 'include/i2c_hid_touchpad.h')
| -rw-r--r-- | include/i2c_hid_touchpad.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/i2c_hid_touchpad.h b/include/i2c_hid_touchpad.h index e24c0f0ab8..3bb53f4020 100644 --- a/include/i2c_hid_touchpad.h +++ b/include/i2c_hid_touchpad.h @@ -52,4 +52,22 @@ struct touchpad_event { } __packed finger[I2C_HID_TOUCHPAD_MAX_FINGERS]; } __packed; +/* Initialize the I2C HID touchpad */ +void i2c_hid_touchpad_init(void); +/* + * Process an I2C-HID command from host. + * + * @param len >= 0 - Input data length in bytes + * @param buffer Shared input/output buffer + * @param send_response Function to send the response to host + * @param data Extracted request content if there is any + * @param reg I2C HID register as defined in include/i2c-hid.h + * @param cmd I2C HID command as defined in common/i2c_hid_touchpad.c + * + * @return EC_SUCCESS, or non-zero if error. + */ +int i2c_hid_touchpad_process(unsigned int len, uint8_t *buffer, + void (*send_response)(int len), uint8_t *data, + int *reg, int *cmd); + #endif /* __CROS_EC_I2C_HID_TOUCHPAD_H */ |