Faster flashing with SMFI (#32)

* WIP: support for new flashing API

* Add SPI flashing support to tool

* Add timeouts when flashing with ectool

* Test SPI reading

* Use chunks for SPI commands

* Sanity test of flash size

* Read rom in sectors

* Relocate memmap region, remove PMC3

* Use ectool to flash

* Remove debugging of spi command

* Fix flashing over smfi

src/common/include/common/command.h

@@ -0,0 +1,39 @@
+#ifndef _COMMON_COMMAND_H
+#define _COMMON_COMMAND_H
+
+enum Command {
+    // Indicates that EC is ready to accept commands
+    CMD_NONE = 0,
+    // Probe for System76 EC protocol
+    CMD_PROBE = 1,
+    // Read board string
+    CMD_BOARD = 2,
+    // Read version string
+    CMD_VERSION = 3,
+    // Write bytes to console
+    CMD_DEBUG = 4,
+    // Access SPI chip
+    CMD_SPI = 5,
+    // Reset EC
+    CMD_RESET = 6,
+    //TODO
+};
+
+enum Result {
+    // Command executed successfully
+    RES_OK = 0,
+    // Command failed with generic error
+    RES_ERR = 1,
+    //TODO
+};
+
+enum CommandSpiFlag {
+    // Read from SPI chip if set, write otherwise
+    CMD_SPI_FLAG_READ = (1 << 0),
+    // Disable SPI chip after executing command
+    CMD_SPI_FLAG_DISABLE = (1 << 1),
+    // Run firmware from scratch RAM if necessary
+    CMD_SPI_FLAG_SCRATCH = (1 << 2),
+};
+
+#endif // _COMMON_COMMAND_H