127 lines
3.5 KiB
C
127 lines
3.5 KiB
C
/* Copyright 2014 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*
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* Smart battery Firmware Update driver.
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* Ref: Common Smart Battery System Interface Specification v8.0.
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*
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* cmd.0x35, Write Word
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* 0x1000: Prepare to Update
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* 0x2000: End of Update
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* 0xF000: Update Firmware
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*
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* cmd.0x35, Read Word
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* Firmware Update Status
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*
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* cmd.0x36 Write Block
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* Send 32 byte firmware image
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*
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* cmd.0x37 Read Word
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* Get Battery Information
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* sequence:=b1,b0,b3,b2,b5,b5,b7,b6
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*
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* Command Sequence for Battery FW Update
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*
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* 0. cmd.0x35.read
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* 1. cmd.0x37.read
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* 2. cmd.0x35.write.0x1000
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* 3. cmd.0x35.read.status (optional)
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* 4. cmd.0x35.write.0xF000
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* 5. cmd.0x35.read.status
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* if bit8-0, go to step 2
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* 6. cmd.0x36.write.32byte
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* 7. cmd.0x35.read.status
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* if FEC.b13=1, go to step 6
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* if fatal.b12=1, go to step 2
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* if b11,b10,b9,b2,b1,b0; go to step 1
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* if b5,b3; go to step 8
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* (repeat 6,7)
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* 8. cmd.0x36.write.0x2000
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* 9. cmd.0x35.read.status
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*/
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#ifndef __UTIL_EC_SB_FIRMWARE_UPDATE_H
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#define __UTIL_EC_SB_FIRMWARE_UPDATE_H
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struct sb_fw_header {
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uint8_t signature[4]; /* "BTFW" */
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uint16_t hdr_version; /* 0x0100 */
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uint16_t pkg_version_major_minor;
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uint16_t vendor_id; /* 8,9 */
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uint16_t battery_type; /* A B */
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uint16_t fw_version; /* C D */
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uint16_t data_table_version; /* E F */
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uint32_t fw_binary_offset; /*0x10 0x11 0x12 0x13 */
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uint32_t fw_binary_size; /* 0x14 0x15 0x16 0x17 */
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uint8_t checksum; /* 0x18 */
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};
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/**
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* sb.fw.update.cmd.0x35, Read Word
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* Firmware Update Status
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*/
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struct sb_fw_update_status {
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uint16_t v_fail_maker_id:1; /* b0 */
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uint16_t v_fail_hw_id:1; /* b1 */
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uint16_t v_fail_fw_version:1; /* b2 */
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uint16_t v_fail_permanent:1; /* b3 */
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uint16_t rsvd5:1; /* b4 */
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uint16_t permanent_failure:1; /* b5 */
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uint16_t abnormal_condition:1; /* b6 */
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uint16_t fw_update_supported:1; /* b7 */
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uint16_t fw_update_mode:1; /* b8 */
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uint16_t fw_corrupted:1; /* b9 */
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uint16_t cmd_reject:1; /* b10 */
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uint16_t invalid_data:1; /* b11 */
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uint16_t fw_fatal_error:1; /* b12 */
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uint16_t fec_error:1; /* b13 */
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uint16_t busy:1; /* b14 */
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uint16_t rsvd15:1; /* b15 */
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} __packed;
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/**
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* sb.fw.update.cmd.0x37 Read Word
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* Get Battery Information
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* sequence:=b1,b0,b3,b2,b5,b5,b7,b6
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*/
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struct sb_fw_update_info {
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uint16_t maker_id; /* b0, b1 */
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uint16_t hardware_id; /* b2, b3 */
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uint16_t fw_version; /* b4, b5 */
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uint16_t data_version;/* b6, b7 */
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} __packed;
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/**
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* smart.battery.maker.id
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*/
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enum sb_maker_id {
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sb_maker_id_lgc = 0x0001, /* b0=0; b1=1 */
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sb_maker_id_panasonic = 0x0002,
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sb_maker_id_sanyo = 0x0003,
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sb_maker_id_sony = 0x0004,
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sb_maker_id_simplo = 0x0005,
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sb_maker_id_celxpert = 0x0006,
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};
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/*
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* Ref: Common Smart Battery System Interface Specification v8.0 page 21-24.
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* case 1. If permanent error:b5,b3, go to setp8.
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* case 2. If error:b11,b10,b9 b2,b1,b0, go to step1. Retry < 3 times.
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* case 3. If firmware update fatal error:b12, go to step2. Retry < 3 times.
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* In order to simply the implementation, I merged case 2 and 3.
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* If firmware update fatal error:b12, go to step1 as well.
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* case 4. If error.FEC.b13=1, go to step6. Retry < 3 times.
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* case 5. If battery interface is busy, retry < 10 times.
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* Delay 1 second between retries.
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*/
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#define SB_FW_UPDATE_ERROR_RETRY_CNT 2
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#define SB_FW_UPDATE_FEC_ERROR_RETRY_CNT 2
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#define SB_FW_UPDATE_BUSY_ERROR_RETRY_CNT 4
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#endif
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