Hello All,
I have a 7" inch Display connected to Raspberrypi-cm3 which using hycontex
capacitive touch screen driver.
hy46xx_ts
So my question is.
Is there a linux driver for hycontek touchscreen driver? Or would I have
to write one for it?
I am unable to find any touchscreen driver with the same name under Linux
master
https://github.com/torvalds/linux
On their website they do offer a Linux_driver_sample_code.zip file. But
having a quick glance at it. It feels like that's more for Android devices.
https://www.hycontek.com/en/category/products-en/touch-en#tab2
So I guess my only reservation in creating one is that, If there is an
already existing driver then that would save a considerable amount of time
in creating and then testing it.
I have attached their linux sample code
Regards,
Shravan Singh
(239) 243-0838
Blue Sparq, Inc.
928 NE 24th Lane unit 4 and 5.
Cape Coral, FL 33993
IMPORTANT: The contents of this email and any attachments are confidential.
They are intended for the named recipient(s) only. If you have received
this email by mistake, please notify the sender immediately and do not
disclose the contents to anyone or make copies thereof.
/* drivers/input/touchscreen/hy46xx_ts.c
*
* HYCON hy46xx TouchScreen driver.
*
* Copyright (c) 2010 Hycon tech Ltd.
*
* 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.
*
*/
#include <linux/cdev.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/earlysuspend.h>
#include <linux/fs.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/init.h>
#include <linux/timer.h>
#include <linux/input/mt.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/kthread.h>
#include <linux/mutex.h>
#include <linux/module.h>
#include <linux/mount.h>
#include <linux/netdevice.h>
#include <linux/proc_fs.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/semaphore.h>
#include <linux/syscalls.h>
#include <linux/sched.h>
#include <linux/timer.h>
#include <linux/types.h>
#include <linux/unistd.h>
#include <linux/uaccess.h>
#include <asm/uaccess.h>
#include <asm/unistd.h>
#include <mach/irqs.h>
#include <mach/gpio.h>
#include <mach/map.h>
#include <mach/regs-clock.h>
#include <mach/regs-gpio.h>
#include <plat/gpio-cfg.h>
#include "hy46xx_ts.h"
#define hy46xx_ts_suspend NULL
#define hy46xx_ts_resume NULL
//static struct i2c_client *this_client;
static struct mutex g_device_mutex;
/************************************************************/
static int i2c_interface_recv(struct i2c_client* client, unsigned char*
pbt_buf, int dw_lenth)
{
int ret;
ret=i2c_master_recv(client, pbt_buf, dw_lenth);
if(ret<=0)
{
return 0;
}
return ret;
}
/************************************************************/
static int i2c_interface_send(struct i2c_client* client, unsigned char*
pbt_buf, int dw_lenth)
{
int ret;
ret=i2c_master_send(client, pbt_buf, dw_lenth);
if(ret<0)
{
return 0;
}
return ret;
}
/**************************************************************/
int hy46xx_i2c_Read(struct i2c_client *client, char *writebuf, int writelen,
char *readbuf, int readlen)
{
int ret;
if (writelen > 0) {
struct i2c_msg msgs[] = {
{
.addr = client->addr,
.flags = 0,
.len = writelen,
.buf = writebuf,
},
{
.addr = client->addr,
.flags = 1,
.len = readlen,
.buf = readbuf,
},
};
ret = i2c_transfer(client->adapter, msgs, 2);
if (ret < 0)
dev_err(&client->dev, "f%s: i2c read error.\n",
__func__);
}
else {
struct i2c_msg msgs[] = {
{
.addr = client->addr,
.flags = 1,
.len = readlen,
.buf = readbuf,
},
};
ret = i2c_transfer(client->adapter, msgs, 1);
if (ret < 0)
dev_err(&client->dev, "%s:i2c read error.\n", __func__);
}
return ret;
}
/**************************************************************/
int hy46xx_i2c_Write(struct i2c_client *client, char *writebuf, int writelen)
{
int ret;
struct i2c_msg msg[] = {
{
.addr = client->addr,
.flags = 0,
.len = writelen,
.buf = writebuf,
},
};
ret = i2c_transfer(client->adapter, msg, 1);
if (ret < 0)
dev_err(&client->dev, "%s i2c write error.\n", __func__);
return ret;
}
/**************************************************************/
int hy46xx_write_reg(struct i2c_client * client, unsigned short regaddr,
unsigned short regvalue)
{
unsigned char buf[2] = {0};
buf[0] = regaddr;
buf[1] = regvalue;
return hy46xx_i2c_Write(client, buf, sizeof(buf));
}
/************************************************************/
int hy46xx_read_reg(struct i2c_client * client, unsigned short regaddr,
unsigned short * regvalue)
{
return hy46xx_i2c_Read(client, ®addr, 1, regvalue, 1);
}
/************************************************************/
static int hy46xx_read_BootloaderVer(struct i2c_client* client, unsigned char*
Boot_Ver)
{
unsigned char read_cmd[2]= {0xff,0x90};
unsigned char cmd_len = 2;
unsigned char data_len = 2;
if(!i2c_interface_send(client, read_cmd, cmd_len))
{
return 0;
}
msleep(5);
if(!i2c_interface_recv(client, Boot_Ver, data_len))
{
return 0;
}
}
/************************************************************/
void hy46xx_reset_tp()
{
gpio_direction_output(HY46XX_RESET_PIN, 0);
msleep(10);
gpio_direction_output(HY46XX_RESET_PIN, 1);
msleep(5);
}
#ifdef HY46XX_FW_UPDATE_ENABLE
/************************************************************/
int hys_ctpm_fw_upgrade(struct i2c_client * client, unsigned char* pbt_buf,
unsigned long dw_lenth, unsigned char lowbyte)
{
unsigned char ret = 0;
unsigned char Data_Buf[2] = {0};
unsigned long i = 0, j = 0;
unsigned long packet_number = 0;
unsigned long temp = 0, lenght = 0;
unsigned char packet_buf[133] = {0};
unsigned char write_flash_enable_cmd[6] = {0xff, 0x63, 0x03, 0x3d,
0x00, 0x00};
unsigned char Read_checksum_cmd[6] = {0xff,0x62,0x10,0x00,0xef,0x00};
unsigned char arr_erase_flash[2] = {0xff, 0x91};
unsigned char bt_ecc = 0;
unsigned char ae_reg = 0xae;
unsigned char boot_ver_cmd[2] = {0xff, 0x90};
packet_number = (dw_lenth) / HYS_PACKET_LENGTH;
packet_buf[0] = 0xbf;
lenght = HYS_PACKET_LENGTH;
packet_buf[3] = (unsigned char)(lenght >> 8);
packet_buf[4] = (unsigned char)lenght;
printk("STEP 1 : RESET TP \n");
hy46xx_reset_tp();
msleep(30);
printk("STEP 2 : Read Bootloader version \n");
ret = i2c_interface_send(client, boot_ver_cmd, 2);
ret = i2c_interface_recv(client, Data_Buf, 2);
printk("read back: reg_val[0]=0x%x, reg_val[1]=0x%x\n", Data_Buf[0],
Data_Buf[1]);
printk("STEP 3 : Write Flash Enable \n");
for(i=0;i<10;i++)
{
hy46xx_i2c_Write(client, write_flash_enable_cmd, 6);
msleep(10);
i2c_interface_recv(client, Data_Buf, 1);
printk(" Write Flash Enable value = 0x%x\n", Data_Buf[0]);
if(Data_Buf[0] == 0x3d)
{ printk("Write Flash Enable success \n");
break;
}
}
if(Data_Buf[0] != 0x3d)
{
printk("Update firmware fail in step 3 \n");
return;
}
printk("STEP 4 : Erase Flash \n");
i2c_interface_send(client, arr_erase_flash, 2);
msleep(1500);
printk("STEP 5 : Write Flash \n");
for (j = 0;j < packet_number; j++)
{
temp = j * HYS_PACKET_LENGTH;
packet_buf[1] = (unsigned char)(temp >> 8);
packet_buf[2] = (unsigned char)temp;
for (i = 0;i < HYS_PACKET_LENGTH; i++)
{
packet_buf[5 + i] = pbt_buf[j * HYS_PACKET_LENGTH + i];
}
ret = i2c_interface_send(client, packet_buf, 133);
if(ret >= 0)
printk("wri_in pack_buf is 133: ret=%d , %d\n", ret,j);
msleep(30);
}
printk("STEP 6 : Read Checksum \n");
ret = i2c_interface_send(client, Read_checksum_cmd, 6);
msleep(200);
ret = i2c_interface_recv(client, Data_Buf, 1);
if((Data_Buf[0] != lowbyte)&&(lowbyte !=0))
{
printk("correct ecc is: 0x%x\n", lowbyte);
printk("ecc return: reg_val[0]=0x%x\n", Data_Buf[0]);
printk("ECC fail , Update firmware fail in step 6 \n");
return -1;
}
else
printk("STEP 7 : Update firmware success ,Reset TP \n");
hy46xx_reset_tp();
msleep(1000);
return 1;
}
/************************************************************/
unsigned char hys_ctpm_get_i_file_ver(void)
{
unsigned short ui_sz;
ui_sz = sizeof(CTPM_FW);
return CTPM_FW[ui_sz - 1];
}
/************************************************************/
int hys_ctpm_fw_upgrade_with_i_file(struct i2c_client * client)
{
unsigned char * pbt_buf = NULL;
int i_ret = -1;
int i;
int fw_len = sizeof(CTPM_FW);
unsigned char IC_FW_Version;
unsigned char I_File_Version;
unsigned char uc_reg_addr;
unsigned char i_checksum = 0;
for(i=0;i<fw_len;i++)
{
i_checksum += CTPM_FW[i];
}
pbt_buf = CTPM_FW;
uc_reg_addr = HY46XX_REG_FW_VER;
hy46xx_reset_tp();
msleep(2000);
printk("[TSP] IC firmware version = 0x%02x\n", IC_FW_Version);
I_File_Version = hys_ctpm_get_i_file_ver();
printk("[TSP] I file verison = 0x%02x\n", I_File_Version);
if((I_File_Version > IC_FW_Version) || (IC_FW_Version == 0xa6))
{
do{
i_ret = hys_ctpm_fw_upgrade(client, pbt_buf,
sizeof(CTPM_FW), i_checksum);
}while(i_ret<0);
}
return i_ret;
}
#endif
#ifdef HYS_APK_DEBUG
/************************************************************/
static int hy46xx_GetFirmwareSize(char * firmware_name)
{
struct file* pfile = NULL;
struct inode *inode;
unsigned long magic;
off_t fsize = 0;
char filepath[128];
memset(filepath, 0, sizeof(filepath));
sprintf(filepath, "%s", firmware_name);
if(NULL == pfile){
pfile = filp_open(filepath, O_RDONLY, 0);
}
if(IS_ERR(pfile)){
pr_err("error occured while opening file %s.\n", filepath);
return -EIO;
}
inode=pfile->f_dentry->d_inode;
magic=inode->i_sb->s_magic;
fsize=inode->i_size;
filp_close(pfile, NULL);
return fsize;
}
/*
*read firmware buf for .bin file.
*/
/************************************************************/
static int hy46xx_ReadFirmware(char * firmware_name, unsigned char *
firmware_buf)
{
struct file* pfile = NULL;
struct inode *inode;
unsigned long magic;
off_t fsize;
char filepath[128];
loff_t pos;
mm_segment_t old_fs;
memset(filepath, 0, sizeof(filepath));
sprintf(filepath, "%s", firmware_name);
if(NULL == pfile){
pfile = filp_open(filepath, O_RDONLY, 0);
}
if(IS_ERR(pfile)){
pr_err("error occured while opening file %s.\n", filepath);
return -EIO;
}
inode=pfile->f_dentry->d_inode;
magic=inode->i_sb->s_magic;
fsize=inode->i_size;
old_fs = get_fs();
set_fs(KERNEL_DS);
pos = 0;
vfs_read(pfile, firmware_buf, fsize, &pos);
filp_close(pfile, NULL);
set_fs(old_fs);
return 0;
}
/*
upgrade with *.bin file
*/
/************************************************************/
int hys_ctpm_fw_upgrade_with_app_file(struct i2c_client * client, char *
firmware_name)
{
unsigned char* pbt_buf = NULL;
int i_ret;
int fwsize = hy46xx_GetFirmwareSize(firmware_name);
if(fwsize <= 0)
{
dev_err(&client->dev, "%s ERROR:Get firmware size failed\n",
__FUNCTION__);
return -EIO;
}
if(fwsize<8 || fwsize>64*1024)
{
dev_err(&client->dev, "FW length error\n");
return -EIO;
}
/*=========FW upgrade========================*/
pbt_buf = (unsigned char *) kmalloc(fwsize+1,GFP_ATOMIC);
if(hy46xx_ReadFirmware(firmware_name, pbt_buf))
{
dev_err(&client->dev, "%s() - ERROR: request_firmware failed\n",
__FUNCTION__);
kfree(pbt_buf);
return -EIO;
}
if((pbt_buf[fwsize-8]^pbt_buf[fwsize-6])==0xFF
&& (pbt_buf[fwsize-7]^pbt_buf[fwsize-5])==0xFF
&& (pbt_buf[fwsize-3]^pbt_buf[fwsize-4])==0xFF)
{
hys_ctpm_fw_upgrade(client, pbt_buf, fwsize, 0);
if (i_ret != 0)
{
dev_err(&client->dev, "%s() - ERROR:[HYS] upgrade failed i_ret
= %d.\n",__FUNCTION__, i_ret);
}
kfree(pbt_buf);
}
else
{
dev_dbg(&client->dev, "FW format error\n");
kfree(pbt_buf);
return -EIO;
}
return i_ret;
}
/************************************************************/
static ssize_t hy46xx_tpfwver_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
ssize_t num_read_chars = 0;
unsigned char fwver = 0;
struct i2c_client *client = container_of(dev, struct i2c_client, dev);
mutex_lock(&g_device_mutex);
if(hy46xx_read_reg(client, HY46XX_REG_FW_VER, &fwver) < 0)
num_read_chars = snprintf(buf, PAGE_SIZE, "get tp fw version
fail!\n");
else
num_read_chars = snprintf(buf, PAGE_SIZE, "%02X\n", fwver);
mutex_unlock(&g_device_mutex);
return num_read_chars;
}
/************************************************************/
static ssize_t hy46xx_tpfwver_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
/* place holder for future use */
return -EPERM;
}
/************************************************************/
static ssize_t hy46xx_tprwreg_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
/* place holder for future use */
return -EPERM;
}
/************************************************************/
static ssize_t hy46xx_tprwreg_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = container_of(dev, struct i2c_client, dev);
ssize_t num_read_chars = 0;
int retval;
unsigned long wmreg=0;
unsigned char regaddr=0xff,regvalue=0xff;
unsigned char valbuf[5]={0};
memset(valbuf, 0, sizeof(valbuf));
mutex_lock(&g_device_mutex);
num_read_chars = count - 1;
if(num_read_chars!=2)
{
if(num_read_chars!=4)
{
dev_err(dev, "please input 2 or 4 character\n");
goto error_return;
}
}
memcpy(valbuf, buf, num_read_chars);
retval = strict_strtoul(valbuf, 16, &wmreg);
if (0 != retval)
{
dev_err(dev, "%s() - ERROR: Could not convert the given input to a
number. The given input was: \"%s\"\n", __FUNCTION__, buf);
goto error_return;
}
if(2 == num_read_chars)
{
//read register
regaddr = wmreg;
if(hy46xx_read_reg(client, regaddr, ®value) < 0)
dev_err(dev, "Could not read the register(0x%02x)\n",
regaddr);
else
dev_dbg(dev, "the register(0x%02x) is 0x%02x\n",
regaddr, regvalue);
}
else
{
regaddr = wmreg>>8;
regvalue = wmreg;
if(hy46xx_write_reg(client, regaddr, regvalue)<0)
dev_err(dev, "Could not write the register(0x%02x)\n",
regaddr);
else
dev_dbg(dev, "Write 0x%02x into register(0x%02x)
successful\n", regvalue, regaddr);
}
error_return:
mutex_unlock(&g_device_mutex);
return count;
}
/************************************************************/
static ssize_t hy46xx_fwupdate_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
/* place holder for future use */
return -EPERM;
}
/************************************************************/
static ssize_t hy46xx_fwupdate_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
struct hy46xx_ts_data *data = NULL;
unsigned char uc_host_fm_ver;int i_ret;
struct i2c_client *client = container_of(dev, struct i2c_client, dev);
data = (struct hy46xx_ts_data *) i2c_get_clientdata( client );
mutex_lock(&g_device_mutex);
disable_irq(client->irq);
i_ret = hys_ctpm_fw_upgrade_with_i_file(client);
if (i_ret == 0)
{
msleep(300);
uc_host_fm_ver = hys_ctpm_get_i_file_ver();
dev_dbg(dev, "%s [HYS] upgrade to new version 0x%x\n",
__FUNCTION__, uc_host_fm_ver);
}
else
{
dev_err(dev, "%s ERROR:[HYS] upgrade failed ret=%d.\n",
__FUNCTION__, i_ret);
}
enable_irq(client->irq);
mutex_unlock(&g_device_mutex);
return count;
}
/************************************************************/
static ssize_t hy46xx_fwupgradeapp_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
/* place holder for future use */
return -EPERM;
}
/************************************************************/
static ssize_t hy46xx_fwupgradeapp_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
{
char fwname[128];
struct i2c_client *client = container_of(dev, struct i2c_client, dev);
memset(fwname, 0, sizeof(fwname));
sprintf(fwname, "%s", buf);
fwname[count-1] = '\0';
mutex_lock(&g_device_mutex);
disable_irq(client->irq);
hys_ctpm_fw_upgrade_with_app_file(client, fwname);
enable_irq(client->irq);
mutex_unlock(&g_device_mutex);
return count;
}
static ssize_t hy46xx_hysgetprojectcode_show(struct device *dev, struct
device_attribute *attr, char *buf)
{
ssize_t num_read_chars = 0;
char projectcode[32];
struct i2c_client *client = container_of(dev, struct i2c_client, dev);
memset(projectcode, 0, sizeof(projectcode));
mutex_lock(&g_device_mutex);
//if(hycon_read_project_code(client, projectcode) < 0)
if(1)
num_read_chars = snprintf(buf, PAGE_SIZE, "get projcet code
fail!\n");
else
num_read_chars = snprintf(buf, PAGE_SIZE, "projcet code =
%s\n", projectcode);
mutex_unlock(&g_device_mutex);
return num_read_chars;
}
/************************************************************/
static ssize_t hy46xx_hysgetprojectcode_store(struct device *dev, struct
device_attribute *attr, const char *buf, size_t count)
{
/* place holder for future use */
return -EPERM;
}
static DEVICE_ATTR(hystpfwver, S_IRUGO|S_IWUSR, hy46xx_tpfwver_show,
hy46xx_tpfwver_store);
static DEVICE_ATTR(hysfwupdate, S_IRUGO|S_IWUSR, hy46xx_fwupdate_show,
hy46xx_fwupdate_store);
static DEVICE_ATTR(hystprwreg, S_IRUGO|S_IWUSR, hy46xx_tprwreg_show,
hy46xx_tprwreg_store);
static DEVICE_ATTR(hysfwupgradeapp, S_IRUGO|S_IWUSR, hy46xx_fwupgradeapp_show,
hy46xx_fwupgradeapp_store);
static DEVICE_ATTR(hysgetprojectcode, S_IRUGO|S_IWUSR,
hy46xx_hysgetprojectcode_show, hy46xx_hysgetprojectcode_store);
static struct attribute *hy46xx_attributes[] = {
&dev_attr_hystpfwver.attr,
&dev_attr_hysfwupdate.attr,
&dev_attr_hystprwreg.attr,
&dev_attr_hysfwupgradeapp.attr,
&dev_attr_hysgetprojectcode.attr,
NULL
};
static struct attribute_group hy46xx_attribute_group = {
.attrs = hy46xx_attributes
};
/************************************************************/
int hy46xx_create_sysfs(struct i2c_client * client)
{
int err;
err = sysfs_create_group(&client->dev.kobj, &hy46xx_attribute_group);
if (0 != err)
{
dev_err(&client->dev, "%s() - ERROR: sysfs_create_group()
failed.error code: %d\n", __FUNCTION__, err);
sysfs_remove_group(&client->dev.kobj, &hy46xx_attribute_group);
return -EIO;
}
else
{
mutex_init(&g_device_mutex);
dev_dbg(&client->dev, "hy46xx:%s() - sysfs_create_group()
succeeded. \n", __FUNCTION__);
}
return err;
}
/************************************************************/
int hy46xx_remove_sysfs(struct i2c_client * client)
{
sysfs_remove_group(&client->dev.kobj, &hy46xx_attribute_group);
mutex_destroy(&g_device_mutex);
}
/************************************************************/
static int hy46xx_debug_write(struct file *filp,
const char __user *buff, unsigned long len, void *data)
{
struct i2c_client *client = (struct i2c_client
*)hy46xx_proc_entry->data;
unsigned char writebuf[HYS_PACKET_LENGTH];
int buflen = len;
int writelen = 0;
int ret = 0;
if (copy_from_user(&writebuf, buff, buflen)) {
dev_err(&client->dev, "%s:copy from user error\n", __func__);
return -EFAULT;
}
proc_operate_mode = writebuf[0];
switch (proc_operate_mode) {
case PROC_UPGRADE:
{
char upgrade_file_path[128];
memset(upgrade_file_path, 0, sizeof(upgrade_file_path));
sprintf(upgrade_file_path, "%s", writebuf + 1);
upgrade_file_path[buflen-1] = '\0';
//DBG("%s\n", upgrade_file_path);
disable_irq(client->irq);
ret = hys_ctpm_fw_upgrade_with_app_file(client,
upgrade_file_path);
enable_irq(client->irq);
if (ret < 0) {
dev_err(&client->dev, "%s:upgrade failed.\n",
__func__);
return ret;
}
}
break;
case PROC_READ_REGISTER:
writelen = 1;
//DBG("%s:register addr=0x%02x\n", __func__, writebuf[1]);
ret = hy46xx_i2c_Write(client, writebuf + 1, writelen);
if (ret < 0) {
dev_err(&client->dev, "%s:write iic error\n", __func__);
return ret;
}
break;
case PROC_WRITE_REGISTER:
writelen = 2;
ret = hy46xx_i2c_Write(client, writebuf + 1, writelen);
if (ret < 0) {
dev_err(&client->dev, "%s:write iic error\n", __func__);
return ret;
}
break;
default:
break;
}
return len;
}
/************************************************************/
static int hy46xx_debug_read( char *page, char **start,
off_t off, int count, int *eof, void *data )
{
struct i2c_client *client = (struct i2c_client
*)hy46xx_proc_entry->data;
int ret = 0, err = 0;
unsigned char tx = 0, rx = 0;
int i, j;
unsigned char buf[PAGE_SIZE];
int num_read_chars = 0;
int readlen = 0;
unsigned char regvalue = 0x00, regaddr = 0x00;
switch (proc_operate_mode) {
case PROC_UPGRADE:
/*after calling hy46xx_debug_write to upgrade*/
regaddr = 0xA6;
ret = hy46xx_read_reg(client, regaddr, ®value);
if (ret < 0)
num_read_chars = sprintf(buf, "%s", "get fw version
failed.\n");
else
num_read_chars = sprintf(buf, "current fw
version:0x%02x\n", regvalue);
break;
case PROC_READ_REGISTER:
readlen = 1;
ret = hy46xx_i2c_Read(client, NULL, 0, buf, readlen);
if (ret < 0) {
dev_err(&client->dev, "%s:read iic error\n", __func__);
return ret;
} else
//DBG("%s:value=0x%02x\n", __func__, buf[0]);
num_read_chars = 1;
break;
default:
break;
}
memcpy(page, buf, num_read_chars);
return num_read_chars;
}
/************************************************************/
int hy46xx_create_apk_debug_channel(struct i2c_client * client)
{
hy46xx_proc_entry = create_proc_entry(PROC_NAME, 0777, NULL);
if (NULL == hy46xx_proc_entry) {
dev_err(&client->dev, "Couldn't create proc entry!\n");
return -ENOMEM;
} else {
dev_info(&client->dev, "Create proc entry success!\n");
hy46xx_proc_entry->data = client;
hy46xx_proc_entry->write_proc = hy46xx_debug_write;
hy46xx_proc_entry->read_proc = hy46xx_debug_read;
}
return 0;
}
/************************************************************/
void hy46xx_release_apk_debug_channel(void)
{
if (hy46xx_proc_entry)
remove_proc_entry(PROC_NAME, NULL);
}
static int hy_rw_iic_drv_major = HY_RW_IIC_DRV_MAJOR;
struct hy_rw_i2c_dev {
struct cdev cdev;
struct mutex hy_rw_i2c_mutex;
struct i2c_client *client;
};
struct hy_rw_i2c_dev *hy_rw_i2c_dev_tt;
static struct class *hys_class;
/************************************************************/
static int iic_drv_myread(struct i2c_client *client, unsigned char *buf, int
length)
{
int ret = 0;
ret = hy46xx_i2c_Read(client, NULL, 0, buf, length);
if(ret<0)
dev_err(&client->dev, "%s:IIC Read failed\n",__func__);
return ret;
}
/************************************************************/
static int iic_drv_mywrite(struct i2c_client *client, unsigned char *buf, int
length)
{
int ret = 0;
ret = hy46xx_i2c_Write(client, buf, length);
if(ret<0)
dev_err(&client->dev, "%s:IIC Write failed\n",__func__);
return ret;
}
/************************************************************/
void hy_rw_iic_drv_fwupdate(struct i2c_client *client, unsigned long arg)
{
struct hy_rw_i2c_queue1 i2c_rw_queue1;
struct hy_rw_i2c1* p;
unsigned char *p1;
unsigned char* p_backup;
unsigned long num = 0;
unsigned long int i_checksum = 0;
int ret = 0;
int i;
unsigned char isum_lowbyte = 0;
if (!access_ok(VERIFY_READ, (struct hy_rw_i2c_queue1*)arg,
sizeof(struct hy_rw_i2c_queue1)))
return -EFAULT;
if(copy_from_user(&i2c_rw_queue1, (struct
hy_rw_i2c_queue1*)arg,sizeof(struct hy_rw_i2c_queue1)))
return -EFAULT;
num = i2c_rw_queue1.num;
p = (struct hy_rw_i2c1*)kmalloc(sizeof(struct hy_rw_i2c1), GFP_KERNEL);
ret = copy_from_user(p, i2c_rw_queue1.i2c_queue1,sizeof(struct
hy_rw_i2c1));
p_backup = p->bytearr_native;
for(i = 0; i < num; i++) {
i_checksum += p_backup[i];
}
isum_lowbyte = (unsigned char) i_checksum;
hys_ctpm_fw_upgrade(client, p->bytearr_native, num, isum_lowbyte);
kfree(p);
p_backup = NULL;
printk("--after kfree\n");
}
/************************************************************/
void hy_rw_iic_drv_RDWR(struct i2c_client *client, unsigned long arg)
{
struct hy_rw_i2c_queue i2c_rw_queue;
unsigned char __user **data_ptrs;
struct hy_rw_i2c * i2c_rw_msg;
int ret = 0;
int i;
if (!access_ok(VERIFY_READ, (struct hy_rw_i2c_queue *)arg,
sizeof(struct hy_rw_i2c_queue)))
return -EFAULT;
if (copy_from_user(&i2c_rw_queue,(struct hy_rw_i2c_queue *)arg,
sizeof(struct hy_rw_i2c_queue)))
return -EFAULT;
if (i2c_rw_queue.queuenum > HY_I2C_RDWR_MAX_QUEUE)
return -EINVAL;
i2c_rw_msg = (struct hy_rw_i2c*)
kmalloc(i2c_rw_queue.queuenum *sizeof(struct hy_rw_i2c),GFP_KERNEL);
if (!i2c_rw_msg)
return -ENOMEM;
if (copy_from_user(i2c_rw_msg,
i2c_rw_queue.i2c_queue,i2c_rw_queue.queuenum*sizeof(struct hy_rw_i2c))) {
kfree(i2c_rw_msg);
return -EFAULT;
}
data_ptrs = kmalloc(i2c_rw_queue.queuenum * sizeof(unsigned char __user
*), GFP_KERNEL);
if (data_ptrs == NULL) {
kfree(i2c_rw_msg);
return -ENOMEM;
}
for (i=0; i< i2c_rw_queue.queuenum; i++) {
if ((i2c_rw_msg[i].length > 8192)||(i2c_rw_msg[i].flag &
I2C_M_RECV_LEN)) {
ret = -EINVAL;
break;
}
data_ptrs[i] = (unsigned char __user *)i2c_rw_msg[i].buf;
i2c_rw_msg[i].buf = kmalloc(i2c_rw_msg[i].length, GFP_KERNEL);
if (i2c_rw_msg[i].buf == NULL) {
ret = -ENOMEM;
break;
}
if (copy_from_user(i2c_rw_msg[i].buf, data_ptrs[i],
i2c_rw_msg[i].length)) {
++i;
ret = -EFAULT;
break;
}
}
if (ret < 0) {
int j;
for (j=0; j<i; ++j){
kfree(i2c_rw_msg[j].buf);}
kfree(data_ptrs);
kfree(i2c_rw_msg);
}
for (i=0; i< i2c_rw_queue.queuenum; i++) {
if (i2c_rw_msg[i].flag) {
ret = iic_drv_myread(client,i2c_rw_msg[i].buf,
i2c_rw_msg[i].length);
if (ret>=0) {
ret = copy_to_user(data_ptrs[i],
i2c_rw_msg[i].buf, i2c_rw_msg[i].length);
kfree(i2c_rw_msg[i].buf);
}
}
else {
iic_drv_mywrite(client,
i2c_rw_msg[i].buf,
i2c_rw_msg[i].length);
kfree(i2c_rw_msg[i].buf);
}
}
kfree(data_ptrs);
kfree(i2c_rw_msg);
}
/************************************************************/
static int hy_rw_iic_drv_open(struct inode *inode, struct file *filp)
{
filp->private_data = hy_rw_i2c_dev_tt;
return 0;
}
/************************************************************/
static int hy_rw_iic_drv_release(struct inode *inode, struct file *filp)
{
return 0;
}
/************************************************************/
void hy_rw_iic_drv_ioctl(struct file *filp, unsigned
int cmd, unsigned long __user arg)
{
struct hy_rw_i2c_dev *ftdev = filp->private_data;
ftdev = filp->private_data;
mutex_lock(&hy_rw_i2c_dev_tt->hy_rw_i2c_mutex);
switch (cmd)
{
case HY_I2C_RW:
hy_rw_iic_drv_RDWR(ftdev->client, arg);
break;
case HY_UPDATE_FW:
hy_rw_iic_drv_fwupdate(ftdev->client, arg);
hy46xx_reset_tp(ftdev->client);
break;
case HY_BOOT_VER:
//get_boot_ver(ftdev->client);
break;
case HY_CMD_ResetTP:
hy46xx_reset_tp(ftdev->client);
break;
default:
break;
}
mutex_unlock(&hy_rw_i2c_dev_tt->hy_rw_i2c_mutex);
}
static const struct file_operations hy_rw_iic_drv_fops = {
.owner = THIS_MODULE,
.open = hy_rw_iic_drv_open,
.release = hy_rw_iic_drv_release,
.unlocked_ioctl = hy_rw_iic_drv_ioctl,
};
/************************************************************/
static void hy_rw_iic_drv_setup_cdev(struct hy_rw_i2c_dev *dev, int index)
{
int err, devno = MKDEV(hy_rw_iic_drv_major, index);
cdev_init(&dev->cdev, &hy_rw_iic_drv_fops);
dev->cdev.owner = THIS_MODULE;
dev->cdev.ops = &hy_rw_iic_drv_fops;
err = cdev_add(&dev->cdev, devno, 1);
if (err)
printk(KERN_NOTICE "Error %d adding LED%d", err, index);
}
/************************************************************/
static int hy_rw_iic_drv_myinitdev(struct i2c_client *client)
{
int err = 0;
dev_t devno = MKDEV(hy_rw_iic_drv_major, 0);
if (hy_rw_iic_drv_major)
err = register_chrdev_region(devno, 1, HY_RW_IIC_DRV);
else {
err = alloc_chrdev_region(&devno, 0, 1, HY_RW_IIC_DRV);
hy_rw_iic_drv_major = MAJOR(devno);
}
if (err < 0) {
dev_err(&client->dev, "%s:hy_rw_iic_drv failed error
code=%d---\n",
__func__, err);
return err;
}
hy_rw_i2c_dev_tt = kmalloc(sizeof(struct hy_rw_i2c_dev), GFP_KERNEL);
if (!hy_rw_i2c_dev_tt){
err = -ENOMEM;
unregister_chrdev_region(devno, 1);
dev_err(&client->dev, "%s:hy_rw_iic_drv failed\n",__func__);
return err;
}
hy_rw_i2c_dev_tt->client = client;
mutex_init(&hy_rw_i2c_dev_tt->hy_rw_i2c_mutex);
hy_rw_iic_drv_setup_cdev(hy_rw_i2c_dev_tt, 0);
hys_class = class_create(THIS_MODULE, "hys_class");
if (IS_ERR(hys_class)) {
dev_err(&client->dev, "%s:failed in creating class.\n",
__func__);
return -1;
}
device_create(hys_class, NULL, MKDEV(hy_rw_iic_drv_major, 0),
NULL, HY_RW_IIC_DRV);
return 0;
}
/************************************************************/
int hy_rw_iic_drv_init(struct i2c_client *client)
{
return hy_rw_iic_drv_myinitdev(client);
}
/************************************************************/
void hy_rw_iic_drv_exit(void)
{
device_destroy(hys_class, MKDEV(hy_rw_iic_drv_major, 0));
class_destroy(hys_class);
cdev_del(&hy_rw_i2c_dev_tt->cdev);
kfree(hy_rw_i2c_dev_tt);
unregister_chrdev_region(MKDEV(hy_rw_iic_drv_major, 0), 1);
}
#endif
/**************************************************************/
static int hy46xx_read_Touchdata(struct hy46xx_ts_data *data)
{
struct ts_event *event = &data->event;
unsigned char buf[POINT_READ_BUF] = { 0 };
int ret = -1;
int i = 0;
unsigned char pointid = HY_MAX_ID;
for(i = 0; i < POINT_READ_BUF; i++)
{
buf[i] = 0xff;
}
memset(event, 0, sizeof(struct ts_event));
buf[0] = 0;
ret = hy46xx_i2c_Read(data->client, buf, 1, buf, POINT_READ_BUF);
if (ret < 0) {
dev_err(&data->client->dev, "%s read touchdata failed.\n",
__func__);
return ret;
}
#if 0
for(i = 0; i < 9; i++)
{
pr_info("buf[%d]= 0x%x ", i,buf[i]);
}
#endif
event->touch_point = 0;
for (i = 0; i < CFG_MAX_TOUCH_POINTS; i++) {
pointid = (buf[HY_TOUCH_ID_POS + HY_TOUCH_STEP * i]) >> 4;
if (pointid >= HY_MAX_ID)
break;
else{
event->touch_point++;
event->au16_x[i] =(unsigned short)
(buf[HY_TOUCH_X_H_POS + HY_TOUCH_STEP * i] & 0x0F) << 8 | (s16)
buf[HY_TOUCH_X_L_POS + HY_TOUCH_STEP * i];
event->au16_y[i] =(unsigned short)
(buf[HY_TOUCH_Y_H_POS + HY_TOUCH_STEP * i] & 0x0F) <<8 | (s16)
buf[HY_TOUCH_Y_L_POS + HY_TOUCH_STEP * i];
event->au8_touch_event[i] =buf[HY_TOUCH_EVENT_POS +
HY_TOUCH_STEP * i] >> 6;
event->au8_finger_id[i] =(buf[HY_TOUCH_ID_POS +
HY_TOUCH_STEP * i]) >> 4;
}
#if 0
pr_info("id=%d event=%d x=%d y=%d\n",
event->au8_finger_id[i],event->au8_touch_event[i], event->au16_x[i],
event->au16_y[i]);
#endif
}
event->pressure = 0x05;
return 0;
}
/**************************************************************/
static void hy46xx_report_value(struct hy46xx_ts_data *data)
{
struct ts_event *event = &data->event;
int i;
int uppoint = 0;
for (i = 0; i < event->touch_point; i++)
{
if((event->au16_x[i] < RESOLUTION_X) && (event->au16_y[i] <
RESOLUTION_Y))
{
input_mt_slot(data->input_dev,
event->au8_finger_id[i]);
if (event->au8_touch_event[i]== 0 ||
event->au8_touch_event[i] == 2)
{
input_mt_report_slot_state(data->input_dev,
MT_TOOL_FINGER,true);
input_report_abs(data->input_dev,
ABS_MT_TOUCH_MAJOR,event->pressure);
input_report_abs(data->input_dev,
ABS_MT_POSITION_X,event->au16_x[i]);
input_report_abs(data->input_dev,
ABS_MT_POSITION_Y,event->au16_y[i]);
}
else
{
uppoint++;
input_mt_report_slot_state(data->input_dev,
MT_TOOL_FINGER,false);
}
}
else
{
input_mt_slot(data->input_dev, event->au8_finger_id[i]);
input_mt_report_slot_state(data->input_dev,
MT_TOOL_FINGER,false);
}
#ifdef LINUX_OS
input_mt_sync(data->input_dev);
#endif
}
if(event->touch_point == uppoint)
input_report_key(data->input_dev, BTN_TOUCH, 0);
else
input_report_key(data->input_dev, BTN_TOUCH, 1);
input_sync(data->input_dev);
}
/**************************************************************/
static irqreturn_t hy46xx_ts_interrupt(int irq, void *dev_id)
{
struct hy46xx_ts_data *hy46xx_ts = dev_id;
//int ret = 0;
disable_irq_nosync(hy46xx_ts->irq);
hy46xx_read_Touchdata(hy46xx_ts);
hy46xx_report_value(hy46xx_ts);
enable_irq(hy46xx_ts->irq);
return IRQ_HANDLED;
}
/**********************************************************************************/
static int hy46xx_ts_probe(struct i2c_client *client,const struct i2c_device_id
*id)
{
struct hy46xx_platform_data *pdata = (struct hy46xx_platform_data
*)client->dev.platform_data;
struct hy46xx_ts_data *hy46xx_ts;
struct input_dev *input_dev;
int err = 0;
unsigned char IC_FW_Verson;
unsigned char I_File_Version;
unsigned char uc_reg_addr;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
err = -ENODEV;
goto exit_check_functionality_failed;
}
hy46xx_ts = kzalloc(sizeof(struct hy46xx_ts_data), GFP_KERNEL);
if (!hy46xx_ts) {
err = -ENOMEM;
goto exit_alloc_data_failed;
}
i2c_set_clientdata(client, hy46xx_ts);
pdata->x_max = RESOLUTION_X;
pdata->y_max = RESOLUTION_Y;
hy46xx_ts->irq = IRQ_EINT(14);
hy46xx_ts->client = client;
hy46xx_ts->pdata = pdata;
hy46xx_ts->x_max = pdata->x_max - 1;
hy46xx_ts->y_max = pdata->y_max - 1;
hy46xx_ts->pdata->reset = HY46XX_RESET_PIN;
hy46xx_ts->pdata->irq = hy46xx_ts->irq;
client->irq = hy46xx_ts->irq;
pr_info("irq = %d\n", client->irq);
err = request_threaded_irq(client->irq, NULL,
hy46xx_ts_interrupt,IRQF_TRIGGER_FALLING, client->dev.driver->name,hy46xx_ts);
if (err < 0) {
dev_err(&client->dev, "hy46xx_probe: request irq failed\n");
goto exit_irq_request_failed;
}
disable_irq(client->irq);
input_dev = input_allocate_device();
if (!input_dev) {
err = -ENOMEM;
dev_err(&client->dev, "failed to allocate input device\n");
goto exit_input_dev_alloc_failed;
}
hy46xx_ts->input_dev = input_dev;
__set_bit(EV_ABS, input_dev->evbit);
__set_bit(EV_KEY, input_dev->evbit);
__set_bit(BTN_TOUCH, input_dev->keybit);
input_mt_init_slots(input_dev, CFG_MAX_TOUCH_POINTS);
input_set_abs_params(input_dev, ABS_MT_TOUCH_MAJOR, 0, 0XFF, 0, 0);
input_set_abs_params(input_dev, ABS_MT_POSITION_X, 0,
(RESOLUTION_X-1), 0, 0);
input_set_abs_params(input_dev, ABS_MT_POSITION_Y, 0,
(RESOLUTION_Y-1), 0, 0);
input_dev->name = HY46XX_NAME;
err = input_register_device(input_dev);
if (err) {
dev_err(&client->dev,
"hy46xx_ts_probe: failed to register input device:
%s\n",
dev_name(&client->dev));
goto exit_input_register_device_failed;
}
#ifdef HYS_APK_DEBUG
hy46xx_create_sysfs(client);
if (hy_rw_iic_drv_init(client) < 0)
dev_err(&client->dev, "%s:[HYS] create fts control iic driver
failed\n",__func__);
hy46xx_create_apk_debug_channel(client);
#endif
hy46xx_reset_tp();
msleep(2000);
/*get firmware version */
uc_reg_addr = HY46XX_REG_FW_VER;
hy46xx_i2c_Read(client, &uc_reg_addr, 1, &IC_FW_Verson, 1);
pr_info( "[HYS] Firmware version = 0x%x\n", IC_FW_Verson);
#ifdef HY46XX_FW_UPDATE_ENABLE
hys_ctpm_fw_upgrade_with_i_file(client);
#endif
enable_irq(client->irq);
return 0;
exit_input_register_device_failed:
input_free_device(input_dev);
exit_input_dev_alloc_failed:
free_irq(client->irq, hy46xx_ts);
//exit_init_gpio:
// hys_un_init_gpio_hw(hy46xx_ts);
exit_irq_request_failed:
i2c_set_clientdata(client, NULL);
kfree(hy46xx_ts);
exit_alloc_data_failed:
exit_check_functionality_failed:
return err;
}
static const struct i2c_device_id hy46xx_ts_id[] = {
{HY46XX_NAME, 0},
{}
};
static const struct of_device_id hy46xx_dt_match[] = {
{.compatible = "hycon,hy46xx_ts"},
{},
};
MODULE_DEVICE_TABLE(of, hy46xx_dt_match);
//MODULE_DEVICE_TABLE(i2c, hy46xx_ts_id);
/************************************************************/
static int __devexit hy46xx_ts_remove(struct i2c_client *client)
{
struct hy46xx_ts_data *hy46xx_ts;
hy46xx_ts = i2c_get_clientdata(client);
input_unregister_device(hy46xx_ts->input_dev);
#ifdef HYS_APK_DEBUG
hy46xx_remove_sysfs(client);
hy_rw_iic_drv_exit();
hy46xx_release_apk_debug_channel();
#endif
free_irq(client->irq, hy46xx_ts);
kfree(hy46xx_ts);
i2c_set_clientdata(client, NULL);
return 0;
}
static struct i2c_driver hy46xx_ts_driver = {
.probe = hy46xx_ts_probe,
.remove = __devexit_p(hy46xx_ts_remove),
.id_table = hy46xx_ts_id,
.suspend = hy46xx_ts_suspend,
.resume = hy46xx_ts_resume,
.driver = {
.name = HY46XX_NAME,
.owner = THIS_MODULE,
.of_match_table = hy46xx_match_table,
},
};
/************************************************************/
static int __init hy46xx_ts_init(void)
{
int ret;
ret = i2c_add_driver(&hy46xx_ts_driver);
if (ret) {
printk(KERN_WARNING "Adding hy46xx driver failed "
"(errno = %d)\n", ret);
} else {
pr_info("Successfully added driver %s\n",
hy46xx_ts_driver.driver.name);
}
return ret;
}
/************************************************************/
static void __exit hy46xx_ts_exit(void)
{
i2c_del_driver(&hy46xx_ts_driver);
}
module_init(hy46xx_ts_init);
module_exit(hy46xx_ts_exit);
MODULE_AUTHOR("<tp term>");
MODULE_DESCRIPTION("HYCON hy46xx TouchScreen driver");
MODULE_LICENSE("GPL");
--
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