/* drivers/input/touchscreen/goodix_tool.c
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*
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* 2010 - 2014 Goodix Technology.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be a reference
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* to you, when you are integrating the GOODiX's CTP IC into your system,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* Version: 1.4
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* Release Date: 2015/07/10
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*/
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#include <linux/delay.h>
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#include <linux/uaccess.h>
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#include <linux/proc_fs.h>
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#include <generated/utsrelease.h>
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#include "gt1x_generic.h"
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static ssize_t gt1x_tool_read(struct file *filp, char __user *buffer, size_t count, loff_t *ppos);
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static ssize_t gt1x_tool_write(struct file *filp, const char *buffer, size_t count, loff_t *ppos);
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static int gt1x_tool_release(struct inode *inode, struct file *filp);
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static int gt1x_tool_open(struct inode *inode, struct file *file);
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#pragma pack(1)
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typedef struct {
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u8 wr;
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u8 flag;
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u8 flag_addr[2];
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u8 flag_val;
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u8 flag_relation;
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u16 circle;
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u8 times;
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u8 retry;
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u16 delay;
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u16 data_len;
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u8 addr_len;
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u8 addr[2];
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u8 res[3];
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u8 *data;
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} st_cmd_head;
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#pragma pack()
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st_cmd_head cmd_head;
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s32 DATA_LENGTH;
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s8 IC_TYPE[16] = "GT1X";
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#define UPDATE_FUNCTIONS
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#define DATA_LENGTH_UINT 512
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#define CMD_HEAD_LENGTH (sizeof(st_cmd_head) - sizeof(u8 *))
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static char procname[20] = { 0 };
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static struct proc_dir_entry *gt1x_tool_proc_entry;
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static const struct proc_ops gt1x_tool_fops = {
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.proc_read = gt1x_tool_read,
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.proc_write = gt1x_tool_write,
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.proc_open = gt1x_tool_open,
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.proc_release = gt1x_tool_release,
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};
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static void set_tool_node_name(char *procname)
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{
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int v0 = 0, v1 = 0, v2 = 0;
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sscanf(UTS_RELEASE, "%d.%d.%d", &v0, &v1, &v2);
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sprintf(procname, "gmnode%02d%02d%02d", v0, v1, v2);
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}
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int gt1x_init_tool_node(void)
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{
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memset(&cmd_head, 0, sizeof(cmd_head));
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/*if the first operation is read, will return fail.*/
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cmd_head.wr = 1;
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cmd_head.data = kzalloc(DATA_LENGTH_UINT, GFP_KERNEL);
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if (NULL == cmd_head.data) {
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GTP_ERROR("Apply for memory failed.");
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return -1;
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}
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GTP_INFO("Alloc memory size:%d.", DATA_LENGTH_UINT);
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DATA_LENGTH = DATA_LENGTH_UINT - GTP_ADDR_LENGTH;
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set_tool_node_name(procname);
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gt1x_tool_proc_entry = proc_create(procname, 0755, NULL, >1x_tool_fops);
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if (gt1x_tool_proc_entry == NULL) {
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GTP_ERROR("CAN't create proc entry /proc/%s.", procname);
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return -1;
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} else {
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GTP_INFO("Created proc entry /proc/%s.", procname);
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}
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return 0;
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}
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void gt1x_deinit_tool_node(void)
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{
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remove_proc_entry(procname, NULL);
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kfree(cmd_head.data);
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cmd_head.data = NULL;
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}
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static s32 tool_i2c_read(u8 *buf, u16 len)
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{
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u16 addr = (buf[0] << 8) + buf[1];
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if (!gt1x_i2c_read(addr, &buf[2], len)) {
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return 1;
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}
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return -1;
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}
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static s32 tool_i2c_write(u8 *buf, u16 len)
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{
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u16 addr = (buf[0] << 8) + buf[1];
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if (!gt1x_i2c_write(addr, &buf[2], len - 2)) {
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return 1;
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}
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return -1;
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}
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static u8 relation(u8 src, u8 dst, u8 rlt)
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{
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u8 ret = 0;
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switch (rlt) {
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case 0:
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ret = (src != dst) ? true : false;
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break;
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case 1:
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ret = (src == dst) ? true : false;
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GTP_DEBUG("equal:src:0x%02x dst:0x%02x ret:%d.", src, dst, (s32) ret);
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break;
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case 2:
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ret = (src > dst) ? true : false;
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break;
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case 3:
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ret = (src < dst) ? true : false;
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break;
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case 4:
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ret = (src & dst) ? true : false;
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break;
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case 5:
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ret = (!(src | dst)) ? true : false;
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break;
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default:
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ret = false;
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break;
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}
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return ret;
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}
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/*******************************************************
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Function:
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Comfirm function.
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Input:
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None.
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Output:
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Return write length.
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********************************************************/
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static u8 comfirm(void)
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{
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s32 i = 0;
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u8 buf[32];
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memcpy(buf, cmd_head.flag_addr, cmd_head.addr_len);
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for (i = 0; i < cmd_head.times; i++) {
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if (tool_i2c_read(buf, 1) <= 0) {
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GTP_ERROR("Read flag data failed!");
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return -1;
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}
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if (true == relation(buf[GTP_ADDR_LENGTH], cmd_head.flag_val, cmd_head.flag_relation)) {
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GTP_DEBUG("value at flag addr:0x%02x.", buf[GTP_ADDR_LENGTH]);
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GTP_DEBUG("flag value:0x%02x.", cmd_head.flag_val);
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break;
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}
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msleep(cmd_head.circle);
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}
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if (i >= cmd_head.times) {
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GTP_ERROR("Didn't get the flag to continue!");
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return -1;
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}
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return 0;
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}
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/*******************************************************
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Function:
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Goodix tool write function.
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Input:
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standard proc write function param.
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Output:
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Return write length.
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********************************************************/
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static ssize_t gt1x_tool_write(struct file *filp, const char __user *buff, size_t len, loff_t *data)
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{
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u64 ret = 0;
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GTP_DEBUG_FUNC();
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GTP_DEBUG_ARRAY((u8 *) buff, len);
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ret = copy_from_user(&cmd_head, buff, CMD_HEAD_LENGTH);
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if (ret) {
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GTP_ERROR("copy_from_user failed.");
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}
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GTP_DEBUG("wr :0x%02x.", cmd_head.wr);
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/*
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GTP_DEBUG("flag:0x%02x.", cmd_head.flag);
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GTP_DEBUG("flag addr:0x%02x%02x.", cmd_head.flag_addr[0], cmd_head.flag_addr[1]);
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GTP_DEBUG("flag val:0x%02x.", cmd_head.flag_val);
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GTP_DEBUG("flag rel:0x%02x.", cmd_head.flag_relation);
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GTP_DEBUG("circle :%d.", (s32)cmd_head.circle);
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GTP_DEBUG("times :%d.", (s32)cmd_head.times);
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GTP_DEBUG("retry :%d.", (s32)cmd_head.retry);
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GTP_DEBUG("delay :%d.", (s32)cmd_head.delay);
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GTP_DEBUG("data len:%d.", (s32)cmd_head.data_len);
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GTP_DEBUG("addr len:%d.", (s32)cmd_head.addr_len);
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GTP_DEBUG("addr:0x%02x%02x.", cmd_head.addr[0], cmd_head.addr[1]);
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GTP_DEBUG("len:%d.", (s32)len);
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GTP_DEBUG("buf[20]:0x%02x.", buff[CMD_HEAD_LENGTH]);
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*/
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if (1 == cmd_head.wr) {
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u16 addr, data_len, pos;
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if (1 == cmd_head.flag) {
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if (comfirm()) {
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GTP_ERROR("[WRITE]Comfirm fail!");
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return -1;
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}
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} else if (2 == cmd_head.flag) {
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/*Need interrupt!*/
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}
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addr = (cmd_head.addr[0] << 8) + cmd_head.addr[1];
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data_len = cmd_head.data_len;
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pos = 0;
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while (data_len > 0) {
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len = data_len > DATA_LENGTH ? DATA_LENGTH : data_len;
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ret = copy_from_user(&cmd_head.data[GTP_ADDR_LENGTH], &buff[CMD_HEAD_LENGTH + pos], len);
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if (ret) {
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GTP_ERROR("[WRITE]copy_from_user failed.");
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return -1;
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}
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cmd_head.data[0] = ((addr >> 8) & 0xFF);
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cmd_head.data[1] = (addr & 0xFF);
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GTP_DEBUG_ARRAY(cmd_head.data, len + GTP_ADDR_LENGTH);
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if (tool_i2c_write(cmd_head.data, len + GTP_ADDR_LENGTH) <= 0) {
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GTP_ERROR("[WRITE]Write data failed!");
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return -1;
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}
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addr += len;
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pos += len;
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data_len -= len;
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}
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if (cmd_head.delay) {
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msleep(cmd_head.delay);
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}
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return cmd_head.data_len + CMD_HEAD_LENGTH;
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} else if (3 == cmd_head.wr) { /* gt1x unused */
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memcpy(IC_TYPE, cmd_head.data, min((u16)sizeof(IC_TYPE), cmd_head.data_len));
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return cmd_head.data_len + CMD_HEAD_LENGTH;
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} else if (5 == cmd_head.wr) { /* ? */
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/*memcpy(IC_TYPE, cmd_head.data, cmd_head.data_len);*/
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return cmd_head.data_len + CMD_HEAD_LENGTH;
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} else if (7 == cmd_head.wr) { /* disable irq! */
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gt1x_irq_disable();
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#if GTP_ESD_PROTECT
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gt1x_esd_switch(SWITCH_OFF);
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#endif
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return CMD_HEAD_LENGTH;
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} else if (9 == cmd_head.wr) { /* enable irq! */
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gt1x_irq_enable();
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#if GTP_ESD_PROTECT
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gt1x_esd_switch(SWITCH_ON);
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#endif
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return CMD_HEAD_LENGTH;
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} else if (17 == cmd_head.wr) {
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ret = copy_from_user(&cmd_head.data[GTP_ADDR_LENGTH], &buff[CMD_HEAD_LENGTH], cmd_head.data_len);
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if (ret) {
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GTP_ERROR("copy_from_user failed.");
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return -1;
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}
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if (cmd_head.data[GTP_ADDR_LENGTH]) {
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GTP_DEBUG("gtp enter rawdiff.");
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gt1x_rawdiff_mode = true;
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} else {
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gt1x_rawdiff_mode = false;
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GTP_DEBUG("gtp leave rawdiff.");
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}
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return CMD_HEAD_LENGTH;
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} else if (11 == cmd_head.wr) {
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gt1x_enter_update_mode();
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} else if (13 == cmd_head.wr) {
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gt1x_leave_update_mode();
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} else if (15 == cmd_head.wr) {
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struct task_struct *thrd = NULL;
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memset(cmd_head.data, 0, cmd_head.data_len + 1);
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memcpy(cmd_head.data, &buff[CMD_HEAD_LENGTH], cmd_head.data_len);
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GTP_DEBUG("update firmware, filename: %s", cmd_head.data);
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thrd = kthread_run(gt1x_update_firmware, (void *)cmd_head.data, "GT1x FW Update");
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if (IS_ERR(thrd)) {
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return PTR_ERR(thrd);
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}
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}
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return CMD_HEAD_LENGTH;
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}
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static u8 devicecount;
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static int gt1x_tool_open(struct inode *inode, struct file *file)
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{
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if (devicecount > 0) {
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return -ERESTARTSYS;
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GTP_ERROR("tools open failed!");
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}
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devicecount++;
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return 0;
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}
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static int gt1x_tool_release(struct inode *inode, struct file *filp)
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{
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devicecount--;
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return 0;
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}
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/*******************************************************
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Function:
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Goodix tool read function.
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Input:
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standard proc read function param.
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Output:
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Return read length.
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********************************************************/
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static ssize_t gt1x_tool_read(struct file *filp, char __user *buffer, size_t count, loff_t *ppos)
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{
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GTP_DEBUG_FUNC();
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if (*ppos) {
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GTP_DEBUG("[PARAM]size: %zd, *ppos: %d", count, (int)*ppos);
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*ppos = 0;
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return 0;
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}
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if (cmd_head.wr % 2) {
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GTP_ERROR("[READ] invaild operator fail!");
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return -1;
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} else if (!cmd_head.wr) {
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/* general i2c read */
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u16 addr, data_len, len, loc;
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if (1 == cmd_head.flag) {
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if (comfirm()) {
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GTP_ERROR("[READ]Comfirm fail!");
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return -1;
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}
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} else if (2 == cmd_head.flag) {
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/*Need interrupt!*/
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}
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addr = (cmd_head.addr[0] << 8) + cmd_head.addr[1];
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data_len = cmd_head.data_len;
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loc = 0;
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GTP_DEBUG("[READ] ADDR:0x%04X.", addr);
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GTP_DEBUG("[READ] Length: %d", data_len);
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if (cmd_head.delay) {
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msleep(cmd_head.delay);
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}
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while (data_len > 0) {
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len = data_len > DATA_LENGTH ? DATA_LENGTH : data_len;
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cmd_head.data[0] = (addr >> 8) & 0xFF;
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cmd_head.data[1] = (addr & 0xFF);
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if (tool_i2c_read(cmd_head.data, len) <= 0) {
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GTP_ERROR("[READ]Read data failed!");
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return -1;
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}
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memcpy(&buffer[loc], &cmd_head.data[GTP_ADDR_LENGTH], len);
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data_len -= len;
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addr += len;
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loc += len;
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GTP_DEBUG_ARRAY(&cmd_head.data[GTP_ADDR_LENGTH], len);
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}
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*ppos += cmd_head.data_len;
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return cmd_head.data_len;
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} else if (2 == cmd_head.wr) {
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GTP_DEBUG("Return ic type:%s len:%d.", buffer, (s32) cmd_head.data_len);
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return -1;
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} else if (4 == cmd_head.wr) {
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/* read fw update progress */
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buffer[0] = update_info.progress >> 8;
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buffer[1] = update_info.progress & 0xff;
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buffer[2] = update_info.max_progress >> 8;
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buffer[3] = update_info.max_progress & 0xff;
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*ppos += 4;
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return 4;
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} else if (6 == cmd_head.wr) {
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/*Read error code!*/
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return -1;
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} else if (8 == cmd_head.wr) {
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/* Read driver version */
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s32 tmp_len;
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tmp_len = strlen(GTP_DRIVER_VERSION);
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memcpy(buffer, GTP_DRIVER_VERSION, tmp_len);
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buffer[tmp_len] = 0;
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*ppos += tmp_len + 1;
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return (tmp_len + 1);
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}
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*ppos += cmd_head.data_len;
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return cmd_head.data_len;
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}
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