gsctool: Add AP RO verify SPI read/write addressing config mode command

This patch adds the ability to get and set the AP RO verification
SPI read/write addressing mode configuration setting from `gsctool` by
adding a new `-C` command flag with an optional argument.

BUG=b:250972056
TEST=Running gsctool locally to set and get the SPI addressing mode to
     verify communication and handlers are working properly:

    $ gsctool -D -C 3byte
    ...
    $ gsctool -D -C
    ...
    3byte
    $ gsctool -D -C 4byte
    ...
    $ gsctool -D -C
    ...
    4byte

Change-Id: I2ad4af65615310cf1477adfda7df1bfdf0e0a914
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3966474
Tested-by: Matt Vertescher <mvertescher@google.com>
Reviewed-by: Alyssa Haroldsen <kupiakos@google.com>
Auto-Submit: Matt Vertescher <mvertescher@google.com>
Commit-Queue: Matt Vertescher <mvertescher@google.com>
Reviewed-by: Jett Rink <jettrink@chromium.org>
Reviewed-by: Vadim Bendebury <vbendeb@chromium.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/include/tpm_vendor_cmds.h b/include/tpm_vendor_cmds.h
index c1d3a1055e..2be888c6a3 100644
--- a/include/tpm_vendor_cmds.h
+++ b/include/tpm_vendor_cmds.h
@@ -170,6 +170,28 @@ enum vendor_cmd_cc {
 	/* POP_LOG_ENTRY with a 64 bit previous timestamp in ms */
 	VENDOR_CC_POP_LOG_ENTRY_MS = 61,
 
+	/*
+	 * Get/set AP RO configuration settings
+	 *
+	 * The message sent and received to this vendor command,
+	 * with the exception * of SET responses, uses the
+	 * following form:
+	 *
+	 * ```c
+	 * struct __attribute__((__packed__)) command_msg {
+	 *   // Current version of the API
+	 *   uint8_t version;
+	 *   // Determines payload type, see
+	 *   // `arv_config_setting_command_e`.
+	 *   uint8_t command;
+	 *   // Type here depends on command
+	 *   struct command_data data;
+	 * };
+	 * ```
+	 */
+	VENDOR_CC_GET_AP_RO_VERIFY_SETTING = 62,
+	VENDOR_CC_SET_AP_RO_VERIFY_SETTING = 63,
+
 	LAST_VENDOR_COMMAND = 65535,
 };