/*******************************************************
Function:
Write data to the i2c slave device.
Input:
client: i2c device.
buf[0~1]: write start address.
buf[2~len-1]: data buffer
len: GTP_ADDR_LENGTH + write bytes count
Output:
numbers of i2c_msgs to transfer:
1: succeed, otherwise: failed
*********************************************************/
s32 gtp_i2c_write(struct i2c_client *client,u8 *buf,s32 len)
{
struct i2c_msg msg;
s32 ret = -1;
s32 retries = 0;
GTP_DEBUG_FUNC();
msg.flags = !I2C_M_RD;
msg.addr = client->addr;
msg.len = len;
msg.buf = buf;
msg.scl_rate = 300 * 1000; // for Rockchip
while(retries < 5)
{
ret = i2c_transfer(client->adapter, &msg, 1);
if (ret == 1)break;
retries++;
}
if((retries >= 5))
{
#if GTP_SLIDE_WAKEUP
if (DOZE_ENABLED == doze_status)
{
return ret;
}
#endif
GTP_DEBUG("I2C communication timeout, resetting chip...");
gtp_reset_guitar(client, 10);
}
return ret;
}
/*******************************************************
Function:
Read data from the i2c slave device.
Input:
client: i2c device.
buf[0]:operate address.
buf[1]~buf[len]:read data buffer.
len:operate length.
Output:
numbers of i2c_msgs to transfer
*********************************************************/
s32 gtp_i2c_read(struct i2c_client *client, u8 *buf, s32 len)
{
struct i2c_msg msgs[2];
s32 ret=-1;
s32 retries = 0;
GTP_DEBUG_FUNC();
msgs[0].flags = !I2C_M_RD;
msgs[0].addr = client->addr;
msgs[0].len = GTP_ADDR_LENGTH;
msgs[0].buf = &buf[0];
msgs[1].flags = I2C_M_RD;
msgs[1].addr = client->addr;
msgs[1].len = len - GTP_ADDR_LENGTH;
msgs[1].buf = &buf[GTP_ADDR_LENGTH];
while(retries < 5)
{
ret = i2c_transfer(client->adapter, msgs, 2);
if(ret == 2)break;
retries++;
}
if(retries >= 5)
{
GTP_DEBUG("I2C retry timeout, reset chip.");
gtp_reset_guitar(client, 10);
}
return ret;
}
/*******************************************************
Function:
write data to the i2c slave device.
Input:
client: i2c device.
buf[0]:operate address.
buf[1]~buf[len]:write data buffer.
len:operate length.
Output:
numbers of i2c_msgs to transfer.
*********************************************************/
s32 gtp_i2c_write(struct i2c_client *client,u8 *buf,s32 len)
{
struct i2c_msg msg;
s32 ret=-1;
s32 retries = 0;
GTP_DEBUG_FUNC();
msg.flags = !I2C_M_RD;
msg.addr = client->addr;
msg.len = len;
msg.buf = buf;
while(retries < 5)
{
ret = i2c_transfer(client->adapter, &msg, 1);
if (ret == 1)break;
retries++;
}
if(retries >= 5)
{
GTP_DEBUG("I2C retry timeout, reset chip.");
gtp_reset_guitar(client, 10);
}
return ret;
}
int gtp_i2c_write(struct i2c_client *client, u8 *buf, int len)
{
struct goodix_ts_data *ts = i2c_get_clientdata(client);
struct i2c_msg msg;
int ret = -EIO;
int retries = 0;
msg.flags = !I2C_M_RD;
msg.addr = client->addr;
msg.len = len;
msg.buf = buf;
while (retries < 5) {
ret = i2c_transfer(client->adapter, &msg, 1);
if (ret == 1)
break;
retries++;
}
if ((retries >= 5)) {
#if GTP_SLIDE_WAKEUP
if (DOZE_ENABLED == doze_status)
return ret;
#endif
if (init_done)
gtp_reset_guitar(ts, 10);
else
dev_warn(&client->dev,
"<GTP> gtp_reset_guitar exit init_done=%d:\n",
init_done);
}
return ret;
}
/*******************************************************
Function:
Read data from the i2c slave device.
Input:
client: i2c device.
buf[0~1]: read start address.
buf[2~len-1]: read data buffer.
len: GTP_ADDR_LENGTH + read bytes count
Output:
numbers of i2c_msgs to transfer:
2: succeed, otherwise: failed
*********************************************************/
s32 gtp_i2c_read(struct i2c_client *client, u8 *buf, s32 len)
{
struct i2c_msg msgs[2];
s32 ret=-1;
s32 retries = 0;
GTP_DEBUG_FUNC();
msgs[0].flags = !I2C_M_RD;
msgs[0].addr = client->addr;
msgs[0].len = GTP_ADDR_LENGTH;
msgs[0].buf = &buf[0];
msgs[0].scl_rate = 300 * 1000; // for Rockchip
msgs[1].flags = I2C_M_RD;
msgs[1].addr = client->addr;
msgs[1].len = len - GTP_ADDR_LENGTH;
msgs[1].buf = &buf[GTP_ADDR_LENGTH];
msgs[1].scl_rate = 300 * 1000;
while(retries < 5)
{
ret = i2c_transfer(client->adapter, msgs, 2);
if(ret == 2)break;
retries++;
}
if((retries >= 5))
{
#if GTP_SLIDE_WAKEUP
// reset chip would quit doze mode
if (DOZE_ENABLED == doze_status)
{
return ret;
}
#endif
GTP_DEBUG("I2C communication timeout, resetting chip...");
gtp_reset_guitar(client, 10);
}
return ret;
}
int gtp_i2c_read(struct i2c_client *client, u8 *buf, int len)
{
struct goodix_ts_data *ts = i2c_get_clientdata(client);
struct i2c_msg msgs[2];
int ret = -EIO;
int retries = 0;
msgs[0].flags = !I2C_M_RD;
msgs[0].addr = client->addr;
msgs[0].len = GTP_ADDR_LENGTH;
msgs[0].buf = &buf[0];
msgs[1].flags = I2C_M_RD;
msgs[1].addr = client->addr;
msgs[1].len = len - GTP_ADDR_LENGTH;
msgs[1].buf = &buf[GTP_ADDR_LENGTH];
while (retries < 5) {
ret = i2c_transfer(client->adapter, msgs, 2);
if (ret == 2)
break;
retries++;
}
if (retries >= 5) {
#if GTP_SLIDE_WAKEUP
if (DOZE_ENABLED == doze_status)
return ret;
#endif
if (init_done)
gtp_reset_guitar(ts, 10);
else
dev_warn(&client->dev,
"<GTP> gtp_reset_guitar exit init_done=%d:\n",
init_done);
}
return ret;
}
