linux-kernel - [PATCH v3 22/30] mfd: cros_ec: Add Smart Battery Firmware update API

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Message-Id: <20190509211353.213194-23-gwendal@chromium.org>
Date:   Thu,  9 May 2019 14:13:45 -0700
From:   Gwendal Grignou <gwendal@...omium.org>
To:     enric.balletbo@...labora.com, bleung@...omium.org,
        groeck@...omium.org, lee.jones@...aro.org, jic23@...nel.org,
        broonie@...nel.org, cychiang@...omium.org, tiwai@...e.com
Cc:     linux-iio@...r.kernel.org, alsa-devel@...a-project.org,
        linux-kernel@...r.kernel.org,
        Gwendal Grignou <gwendal@...omium.org>
Subject: [PATCH v3 22/30] mfd: cros_ec: Add Smart Battery Firmware update API

Add API to update battery firmware.

Acked-by: Enric Balletbo i Serra <enric.balletbo@...labora.com>
Acked-by: Benson Leung <bleung@...omium.org>
Signed-off-by: Gwendal Grignou <gwendal@...omium.org>
---
 include/linux/mfd/cros_ec_commands.h | 73 ++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)

diff --git a/include/linux/mfd/cros_ec_commands.h b/include/linux/mfd/cros_ec_commands.h
index 7f98c6e63ad1..49ea905cfd18 100644
--- a/include/linux/mfd/cros_ec_commands.h
+++ b/include/linux/mfd/cros_ec_commands.h
@@ -4243,6 +4243,79 @@ struct ec_response_battery_vendor_param {
 	uint32_t value;
 } __ec_align4;
 
+/*****************************************************************************/
+/*
+ * Smart Battery Firmware Update Commands
+ */
+#define EC_CMD_SB_FW_UPDATE 0x00B5
+
+enum ec_sb_fw_update_subcmd {
+	EC_SB_FW_UPDATE_PREPARE  = 0x0,
+	EC_SB_FW_UPDATE_INFO     = 0x1, /*query sb info */
+	EC_SB_FW_UPDATE_BEGIN    = 0x2, /*check if protected */
+	EC_SB_FW_UPDATE_WRITE    = 0x3, /*check if protected */
+	EC_SB_FW_UPDATE_END      = 0x4,
+	EC_SB_FW_UPDATE_STATUS   = 0x5,
+	EC_SB_FW_UPDATE_PROTECT  = 0x6,
+	EC_SB_FW_UPDATE_MAX      = 0x7,
+};
+
+#define SB_FW_UPDATE_CMD_WRITE_BLOCK_SIZE 32
+#define SB_FW_UPDATE_CMD_STATUS_SIZE 2
+#define SB_FW_UPDATE_CMD_INFO_SIZE 8
+
+struct ec_sb_fw_update_header {
+	uint16_t subcmd;  /* enum ec_sb_fw_update_subcmd */
+	uint16_t fw_id;   /* firmware id */
+} __ec_align4;
+
+struct ec_params_sb_fw_update {
+	struct ec_sb_fw_update_header hdr;
+	union {
+		/* EC_SB_FW_UPDATE_PREPARE  = 0x0 */
+		/* EC_SB_FW_UPDATE_INFO     = 0x1 */
+		/* EC_SB_FW_UPDATE_BEGIN    = 0x2 */
+		/* EC_SB_FW_UPDATE_END      = 0x4 */
+		/* EC_SB_FW_UPDATE_STATUS   = 0x5 */
+		/* EC_SB_FW_UPDATE_PROTECT  = 0x6 */
+		/* Those have no args */
+
+		/* EC_SB_FW_UPDATE_WRITE    = 0x3 */
+		struct __ec_align4 {
+			uint8_t  data[SB_FW_UPDATE_CMD_WRITE_BLOCK_SIZE];
+		} write;
+	};
+} __ec_align4;
+
+struct ec_response_sb_fw_update {
+	union {
+		/* EC_SB_FW_UPDATE_INFO     = 0x1 */
+		struct __ec_align1 {
+			uint8_t data[SB_FW_UPDATE_CMD_INFO_SIZE];
+		} info;
+
+		/* EC_SB_FW_UPDATE_STATUS   = 0x5 */
+		struct __ec_align1 {
+			uint8_t data[SB_FW_UPDATE_CMD_STATUS_SIZE];
+		} status;
+	};
+} __ec_align1;
+
+/*
+ * Entering Verified Boot Mode Command
+ * Default mode is VBOOT_MODE_NORMAL if EC did not receive this command.
+ * Valid Modes are: normal, developer, and recovery.
+ */
+#define EC_CMD_ENTERING_MODE 0x00B6
+
+struct ec_params_entering_mode {
+	int vboot_mode;
+} __ec_align4;
+
+#define VBOOT_MODE_NORMAL    0
+#define VBOOT_MODE_DEVELOPER 1
+#define VBOOT_MODE_RECOVERY  2
+
 /*****************************************************************************/
 /*
  * HDMI CEC commands
-- 
2.21.0.1020.gf2820cf01a-goog