drivers/input/touchscreen/focaltech_touch/focaltech_flash/focaltech_upgrade_ft3427.c

/*
 *
 * FocalTech fts TouchScreen driver.
 *
 * Copyright (c) 2010-2018, Focaltech Ltd. All rights reserved.
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 */

/*****************************************************************************
*
* File Name: focaltech_upgrade_ft5x46.c
*
* Author: Focaltech Driver Team
*
* Created: 2016-08-15
*
* Abstract:
*
* Reference:
*
*****************************************************************************/
/*****************************************************************************
* 1.Included header files
*****************************************************************************/
#include "../focaltech_core.h"
#include "../focaltech_flash.h"

/*****************************************************************************
* Static function prototypes
*****************************************************************************/
static int fts_ft5x46_init(void)
{
    struct fts_upgrade *upg = fwupgrade;

    if (NULL == upg) {
        FTS_ERROR("upg is null");
        return -EINVAL;
    }

    if (upg->fw_length < FTS_MIN_LEN) {
        FTS_ERROR("fw length fail");
        return -EINVAL;
    }

    upgrade_func_ft5x46.fwveroff = upg->fw_length - 2;
    return 0;
}

/************************************************************************
* Name: fts_ft5x46_upgrade
* Brief:
* Input:
* Output:
* Return: return 0 if success, otherwise return error code
***********************************************************************/
static int fts_ft5x46_upgrade(struct i2c_client *client, u8 *buf, u32 len)
{
    int ret = 0;
    u32 start_addr = 0;
    u8 cmd[4] = { 0 };
    int ecc_in_host = 0;
    int ecc_in_tp = 0;

    if (NULL == buf) {
        FTS_ERROR("fw buf is null");
        return -EINVAL;
    }

    if ((len < FTS_MIN_LEN) || (len > (60 * 1024))) {
        FTS_ERROR("fw buffer len(%x) fail", len);
        return -EINVAL;
    }

    /* enter into upgrade environment */
    ret = fts_fwupg_enter_into_boot(client);
    if (ret < 0) {
        FTS_ERROR("enter into pramboot/bootloader fail,ret=%d", ret);
        goto fw_reset;
    }

    cmd[0] = FTS_CMD_FLASH_MODE;
    cmd[1] = FLASH_MODE_UPGRADE_VALUE;
    ret = fts_i2c_write(client, cmd, 2);
    if (ret < 0) {
        FTS_ERROR("upgrade mode(09) cmd write fail");
        goto fw_reset;
    }

    cmd[0] = FTS_CMD_DATA_LEN;
    cmd[1] = BYTE_OFF_16(len);
    cmd[2] = BYTE_OFF_8(len);
    cmd[3] = BYTE_OFF_0(len);
    ret = fts_i2c_write(client, cmd, FTS_CMD_DATA_LEN_LEN);
    if (ret < 0) {
        FTS_ERROR("data len cmd write fail");
        goto fw_reset;
    }

    ret = fts_fwupg_erase(client, FTS_REASE_APP_DELAY);
    if (ret < 0) {
        FTS_ERROR("erase cmd write fail");
        goto fw_reset;
    }

    /* write app */
    start_addr = upgrade_func_ft5x46.appoff;
    ecc_in_host = fts_flash_write_buf(client, start_addr, buf, len, 1);
    if (ecc_in_host < 0 ) {
        FTS_ERROR("lcd initial code write fail");
        goto fw_reset;
    }

    /* ecc */
    ecc_in_tp = fts_fwupg_ecc_cal(client, start_addr, len);
    if (ecc_in_tp < 0 ) {
        FTS_ERROR("ecc read fail");
        goto fw_reset;
    }

    FTS_INFO("ecc in tp:%x, host:%x", ecc_in_tp, ecc_in_host);
    if (ecc_in_tp != ecc_in_host) {
        FTS_ERROR("ecc check fail");
        goto fw_reset;
    }

    FTS_INFO("upgrade success, reset to normal boot");
    ret = fts_fwupg_reset_in_boot(client);
    if (ret < 0) {
        FTS_ERROR("reset to normal boot fail");
    }

    msleep(200);
    return 0;

fw_reset:
    FTS_INFO("upgrade fail, reset to normal boot");
    ret = fts_fwupg_reset_in_boot(client);
    if (ret < 0) {
        FTS_ERROR("reset to normal boot fail");
    }
    return -EIO;
}

struct upgrade_func upgrade_func_ft5x46 = {
    .ctype = {0x02},
    .fwveroff = 0x0000,
    .fwcfgoff = 0xD780,
    .appoff = 0x0000,
    .pramboot_supported = false,
    .hid_supported = true,
    .init = fts_ft5x46_init,
    .upgrade = fts_ft5x46_upgrade,
};