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d8872b6cb7
This CL initializes the default transmit mode for I2C to CMDC_NOP. When we introduced the protocol, we changed the default mode to send message protocol version. This didn't take into account that U-Boot's probe command (and probably other userspace commands) do a single-byte read to probe. So when the probe was asking for a single byte, by default we were sending multiple bytes for the version message. This CL also makes the EC reset the mode to noop after each EC-to-AP transmission. This will help ensure that the EC ends up in a known state e.g. if the system is reset. That will require the AP to set the mode before requesting any real data, but that's how we do things now anyway. BUG=chrome-os-partner:9556 TEST=Tested on Daisy. Tested by running "i2c dev 4; i2c probe" at U-Boot prompt, booting system, and typing on keyboard. Everything seems to work okay. Signed-off-by: David Hendricks <dhendrix@chromium.org> Change-Id: I0849c94588a9a60ade657af8f941f7267553e316
- EC Lib
This wraps Blizzard driverlib and implements the EC chip interface defined
by Google. See below diagram for architecture.
+--------------------+
| Host BIOS/OS |
+--------------------+
---- host interface ----
+--------------------+
| Google EC features |
+--------------------+
---- chip interface ---- The interface is defined in
src/platform/ec/chip_interface/*.
+--------------------+ But the real implementation is in EC Lib.
| EC Lib |
+--------------------+
| Blizzard low level |
| driver, the |
| driverlib. |
+--------------------+