EC: Add smart battery firmware update driver

Ref: Common Smart Battery System Inferface Specification v8.0.

- Added 2 new AP->EC Command APIs
	EC_CMD_SB_FW_UPDATE, EC_CMD_ENTERING_MODE
- Implemented common smart battery update drivers.

BUG=chrome-os-partner:24741
CQ-DEPEND=CL:210032
CQ-DEPEND=CL:210033
CQ-DEPEND=CL:215720
BRANCH=ToT,glimmer
TEST=Verified on LGC & Simplo smart battery

Change-Id: Ice6e60b1b04762217ae7613356d6925777c06abf
Signed-off-by: Sheng-Liang Song <ssl@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/205323
Reviewed-by: Randall Spangler <rspangler@chromium.org>

1 files changed, 114 insertions, 0 deletions

diff --git a/driver/battery/sb_fw_update.h b/driver/battery/sb_fw_update.h
new file mode 100644
index 0000000000..aaf2c88da0
--- /dev/null
+++ b/driver/battery/sb_fw_update.h
@@ -0,0 +1,114 @@
+/* Copyright (c) 2014 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.
+ *
+ * Smart battery Firmware Update driver.
+ * Ref: Common Smart Battery System Interface Specification v8.0.
+ *
+ * cmd.0x35, Write Word
+ *   0x1000: Prepare to Update
+ *   0x2000: End of Update
+ *   0xF000: Update Firmware
+ *
+ * cmd.0x35, Read Word
+ *   Firmware Update Status
+ *
+ * cmd.0x36 Write Block
+ *   Send 32 byte firmware image
+ *
+ * cmd.0x37 Read Word
+ *   Get Battery Information
+ *   sequence:=b1,b0,b3,b2,b5,b5,b7,b6
+ *
+ * Command Sequence for Battery FW Update
+ *
+ *  0. cmd.0x35.read
+ *  1. cmd.0x37.read
+ *  2. cmd.0x35.write.0x1000
+ *  3. cmd.0x35.read.status (optional)
+ *  4. cmd.0x35.write.0xF000
+ *  5. cmd.0x35.read.status
+ *     if bit8-0, go to step 2
+ *  6. cmd.0x36.write.32byte
+ *  7. cmd.0x35.read.status
+ *     if FEC.b13=1, go to step 6
+ *     if fatal.b12=1, go to step 2
+ *     if b11,b10,b9,b2,b1,b0; go to step 1
+ *     if b5,b3; go to step 8
+ *    (repeat 6,7)
+ *  8. cmd.0x36.write.0x2000
+ *  9. cmd.0x35.read.status
+ */
+
+#ifndef __EC_SB_FW_UPDATE__
+#define __EC_SB_FW_UPDATE__
+
+#define SB_FW_UPDATE_CMD_WRITE_WORD  0x35
+#define SB_FW_UPDATE_CMD_WRITE_WORD_PREPARE  0x1000
+#define SB_FW_UPDATE_CMD_WRITE_WORD_END      0x2000
+#define SB_FW_UPDATE_CMD_WRITE_WORD_UPDATE   0xF000
+
+#define SB_FW_UPDATE_CMD_READ_STATUS 0x35 /* len:0+data:2+pec:1 */
+
+#define SB_FW_UPDATE_CMD_WRITE_BLOCK 0x36 /* len:1+data:32+pec:1 */
+
+#define SB_FW_UPDATE_CMD_READ_INFO   0x37 /* len:1+data:8+pec:1 */
+
+/**
+ * sb.fw.update.cmd.0x35, Read Word
+ *    Firmware Update Status
+ */
+struct sb_fw_update_status {
+	uint16_t v_fail_maker_id:1; /* b0 */
+	uint16_t v_fail_hw_id:1; /* b1 */
+	uint16_t v_fail_fw_version:1; /* b2 */
+	uint16_t v_fail_permanent:1; /* b3 */
+
+	uint16_t rsvd5:1; /* b4 */
+	uint16_t permanent_failure:1; /* b5 */
+	uint16_t abnormal_condition:1; /* b6 */
+	uint16_t fw_update_supported:1; /* b7 */
+
+	uint16_t fw_update_mode:1; /* b8 */
+	uint16_t fw_corrupted:1; /* b9 */
+	uint16_t cmd_reject:1; /* b10 */
+	uint16_t invalid_data:1; /* b11 */
+
+	uint16_t fw_fatal_error:1; /* b12 */
+	uint16_t fec_error:1; /* b13 */
+	uint16_t busy:1; /* b14 */
+	uint16_t rsvd15:1; /* b15 */
+} __packed;
+
+/**
+ * sb.fw.update.cmd.0x37 Read Word
+ *     Get Battery Information
+ *     sequence:=b1,b0,b3,b2,b5,b5,b7,b6
+ */
+struct sb_fw_update_info {
+	uint16_t maker_id;    /* b0, b1 */
+	uint16_t hardware_id; /* b2, b3 */
+	uint16_t fw_version;  /* b4, b5 */
+	uint16_t data_version;/* b6, b7 */
+} __packed;
+
+/**
+ * smart.battery.maker.id
+ */
+enum sb_maker_id {
+	sb_maker_id_lgc       = 0x0001, /* b0=0; b1=1 */
+	sb_maker_id_panasonic = 0x0002,
+	sb_maker_id_sanyo     = 0x0003,
+	sb_maker_id_sony      = 0x0004,
+	sb_maker_id_simplo    = 0x0005,
+	sb_maker_id_celxpert  = 0x0006,
+};
+
+/**
+ * Check if a Smart Battery Firmware Update is inprogress.
+ *
+ * @return 1 if YES, 0 if NO.
+ */
+int sb_fw_update_in_progress(void);
+
+#endif