mkbp: Separate MKBP_INFO host command from the keyboard driver

Detaching protocol-related info command from the keyboard driver.

BUG=b:170966461
BRANCH=main,firmware-dedede-13606.B,firmware-volteer-13672.B-main
TEST=None

Signed-off-by: Boris Mittelberg <bmbm@google.com>
Change-Id: I7943f7537bdf003145e9bd909a14f9451d922a5a
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2796381

1 files changed, 144 insertions, 0 deletions

diff --git a/common/mkbp_info.c b/common/mkbp_info.c
new file mode 100644
index 0000000000..f31852abca
--- /dev/null
+++ b/common/mkbp_info.c
@@ -0,0 +1,144 @@
+/* Copyright 2021 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* MKBP info host command */
+
+#include "common.h"
+#include "console.h"
+#include "ec_commands.h"
+#include "host_command.h"
+#include "keyboard_config.h"
+#include "keyboard_mkbp.h"
+#include "keyboard_scan.h"
+#include "util.h"
+
+static uint32_t get_supported_buttons(void)
+{
+	uint32_t val = 0;
+
+#ifdef CONFIG_VOLUME_BUTTONS
+	val |= BIT(EC_MKBP_VOL_UP) | BIT(EC_MKBP_VOL_DOWN);
+#endif /* defined(CONFIG_VOLUME_BUTTONS) */
+
+#ifdef CONFIG_DEDICATED_RECOVERY_BUTTON
+	val |= BIT(EC_MKBP_RECOVERY);
+#endif /* defined(CONFIG_DEDICATED_RECOVERY_BUTTON) */
+
+#ifdef CONFIG_POWER_BUTTON
+	val |= BIT(EC_MKBP_POWER_BUTTON);
+#endif /* defined(CONFIG_POWER_BUTTON) */
+
+	return val;
+}
+
+static uint32_t get_supported_switches(void)
+{
+	uint32_t val = 0;
+
+#ifdef CONFIG_LID_SWITCH
+	val |= BIT(EC_MKBP_LID_OPEN);
+#endif
+#ifdef CONFIG_TABLET_MODE_SWITCH
+	val |= BIT(EC_MKBP_TABLET_MODE);
+#endif
+#ifdef CONFIG_BASE_ATTACHED_SWITCH
+	val |= BIT(EC_MKBP_BASE_ATTACHED);
+#endif
+#ifdef CONFIG_FRONT_PROXIMITY_SWITCH
+	val |= BIT(EC_MKBP_FRONT_PROXIMITY);
+#endif
+	return val;
+}
+
+static enum ec_status mkbp_get_info(struct host_cmd_handler_args *args)
+{
+	const struct ec_params_mkbp_info *p = args->params;
+
+	if (args->params_size == 0 || p->info_type == EC_MKBP_INFO_KBD) {
+		struct ec_response_mkbp_info *r = args->response;
+
+#ifdef CONFIG_KEYBOARD_PROTOCOL_MKBP
+		/* Version 0 just returns info about the keyboard. */
+		r->rows = KEYBOARD_ROWS;
+		r->cols = KEYBOARD_COLS_MAX;
+#else
+		r->rows = 0;
+		r->cols = 0;
+#endif /* CONFIG_KEYBOARD_PROTOCOL_MKBP */
+
+		/* This used to be "switches" which was previously 0. */
+		r->reserved = 0;
+
+		args->response_size = sizeof(struct ec_response_mkbp_info);
+	} else {
+		union ec_response_get_next_data *r = args->response;
+
+		/* Version 1 (other than EC_MKBP_INFO_KBD) */
+		switch (p->info_type) {
+		case EC_MKBP_INFO_SUPPORTED:
+			switch (p->event_type) {
+			case EC_MKBP_EVENT_BUTTON:
+				r->buttons = get_supported_buttons();
+				args->response_size = sizeof(r->buttons);
+				break;
+
+			case EC_MKBP_EVENT_SWITCH:
+				r->switches = get_supported_switches();
+				args->response_size = sizeof(r->switches);
+				break;
+
+			default:
+				/* Don't care for now for other types. */
+				return EC_RES_INVALID_PARAM;
+			}
+			break;
+
+		case EC_MKBP_INFO_CURRENT:
+			switch (p->event_type) {
+#ifdef HAS_TASK_KEYSCAN
+			case EC_MKBP_EVENT_KEY_MATRIX:
+				memcpy(r->key_matrix, keyboard_scan_get_state(),
+				       sizeof(r->key_matrix));
+				args->response_size = sizeof(r->key_matrix);
+				break;
+#endif
+			case EC_MKBP_EVENT_HOST_EVENT:
+				r->host_event = (uint32_t)host_get_events();
+				args->response_size = sizeof(r->host_event);
+				break;
+
+#ifdef CONFIG_HOST_EVENT64
+			case EC_MKBP_EVENT_HOST_EVENT64:
+				r->host_event64 = host_get_events();
+				args->response_size = sizeof(r->host_event64);
+				break;
+#endif
+
+			case EC_MKBP_EVENT_BUTTON:
+				r->buttons = mkbp_get_button_state();
+				args->response_size = sizeof(r->buttons);
+				break;
+
+			case EC_MKBP_EVENT_SWITCH:
+				r->switches = mkbp_get_switch_state();
+				args->response_size = sizeof(r->switches);
+				break;
+
+			default:
+				/* Doesn't make sense for other event types. */
+				return EC_RES_INVALID_PARAM;
+			}
+			break;
+
+		default:
+			/* Unsupported query. */
+			return EC_RES_ERROR;
+		}
+	}
+	return EC_RES_SUCCESS;
+}
+
+DECLARE_HOST_COMMAND(EC_CMD_MKBP_INFO, mkbp_get_info,
+		     EC_VER_MASK(0) | EC_VER_MASK(1));