1 files changed, 481 insertions, 0 deletions
diff --git a/drivers/input/touchscreen/ist30xxc/ist30xxc_sys.c b/drivers/input/touchscreen/ist30xxc/ist30xxc_sys.c
new file mode 100644
index 00000000..b419fb31
--- /dev/null
+++ b/drivers/input/touchscreen/ist30xxc/ist30xxc_sys.c
@@ -0,0 +1,481 @@
+/*
+ *  Copyright (C) 2010,Imagis Technology Co. Ltd. All Rights Reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  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/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/i2c.h>
+#include <linux/delay.h>
+#include <asm/unaligned.h>
+
+#include <asm/io.h>
+#include <linux/regulator/consumer.h>
+#include <linux/regulator/machine.h>
+
+#include "ist30xxc.h"
+#include "ist30xxc_tracking.h"
+
+extern char *ist_vdd_name;
+/******************************************************************************
+ * Return value of Error
+ * EPERM  : 1 (Operation not permitted)
+ * ENOENT : 2 (No such file or directory)
+ * EIO    : 5 (I/O error)
+ * ENXIO  : 6 (No such device or address)
+ * EINVAL : 22 (Invalid argument)
+ *****************************************************************************/
+
+int ist30xx_cmd_gesture(struct i2c_client *client, int value)
+{
+	int ret = -EIO;
+
+	if (value > 3)
+		return ret;
+
+	ret = ist30xx_write_cmd(client,
+			IST30XX_HIB_CMD, (eHCOM_GESTURE_EN << 16) | (value & 0xFFFF));
+
+	return ret;
+}
+
+int ist30xx_cmd_start_scan(struct ist30xx_data *data)
+{
+	int ret = ist30xx_write_cmd(data->client, IST30XX_HIB_CMD,
+			(eHCOM_FW_START << 16) | (IST30XX_ENABLE & 0xFFFF));
+
+	ist30xx_tracking(TRACK_CMD_SCAN);
+
+	data->status.noise_mode = true;
+
+	return ret;
+}
+
+int ist30xx_cmd_calibrate(struct i2c_client *client)
+{
+	int ret = ist30xx_write_cmd(client,
+			IST30XX_HIB_CMD, (eHCOM_RUN_CAL_AUTO << 16));
+
+	ist30xx_tracking(TRACK_CMD_CALIB);
+
+	tsp_info("%s\n", __func__);
+
+	return ret;
+}
+
+int ist30xx_cmd_check_calib(struct i2c_client *client)
+{
+	int ret = ist30xx_write_cmd(client, IST30XX_HIB_CMD,
+			(eHCOM_RUN_CAL_PARAM << 16) | (IST30XX_ENABLE & 0xFFFF));
+
+	ist30xx_tracking(TRACK_CMD_CHECK_CALIB);
+
+	tsp_info("*** Check Calibration cmd ***\n");
+
+	return ret;
+}
+
+int ist30xx_cmd_hold(struct i2c_client *client, int enable)
+{
+	int ret = ist30xx_write_cmd(client,
+			IST30XX_HIB_CMD, (eHCOM_FW_HOLD << 16) | (enable & 0xFFFF));
+
+	msleep(40);
+
+	if (enable)
+		ist30xx_tracking(TRACK_CMD_ENTER_REG);
+	else
+		ist30xx_tracking(TRACK_CMD_EXIT_REG);
+
+	return ret;
+}
+
+int ist30xx_i2c_transfer(struct i2c_adapter *adap, struct i2c_msg *msgs,
+			 int msg_num, u8 *cmd_buf)
+{
+	int ret = 0;
+	int idx = msg_num - 1;
+	int size = msgs[idx].len;
+	u8 *msg_buf = NULL;
+	u8 *pbuf = NULL;
+	int trans_size, max_size = 0;
+
+	if (msg_num == WRITE_CMD_MSG_LEN)
+		max_size = I2C_MAX_WRITE_SIZE;
+	else if (msg_num == READ_CMD_MSG_LEN)
+		max_size = I2C_MAX_READ_SIZE;
+
+	if (unlikely(max_size == 0)) {
+		tsp_err("%s() : transaction size(%d)\n", __func__, max_size);
+		return -EINVAL;
+	}
+
+	if (msg_num == WRITE_CMD_MSG_LEN) {
+		msg_buf = kmalloc(max_size + IST30XX_ADDR_LEN, GFP_KERNEL);
+		if (!msg_buf)
+			return -ENOMEM;
+		memcpy(msg_buf, cmd_buf, IST30XX_ADDR_LEN);
+		pbuf = msgs[idx].buf;
+	}
+
+	while (size > 0) {
+		trans_size = (size >= max_size ? max_size : size);
+
+		msgs[idx].len = trans_size;
+		if (msg_num == WRITE_CMD_MSG_LEN) {
+			memcpy(&msg_buf[IST30XX_ADDR_LEN], pbuf, trans_size);
+			msgs[idx].buf = msg_buf;
+			msgs[idx].len += IST30XX_ADDR_LEN;
+		}
+		ret = i2c_transfer(adap, msgs, msg_num);
+		if (unlikely(ret != msg_num)) {
+			tsp_err("%s() : i2c_transfer failed(%d), num=%d\n",
+				__func__, ret, msg_num);
+			break;
+		}
+
+		if (msg_num == WRITE_CMD_MSG_LEN)
+			pbuf += trans_size;
+		else
+			msgs[idx].buf += trans_size;
+
+		size -= trans_size;
+	}
+
+	if (msg_num == WRITE_CMD_MSG_LEN)
+		kfree(msg_buf);
+
+	return ret;
+}
+
+int ist30xx_read_buf(struct i2c_client *client, u32 cmd, u32 *buf, u16 len)
+{
+	int ret, i;
+	u32 le_reg = cpu_to_be32(cmd);
+
+	struct i2c_msg msg[READ_CMD_MSG_LEN] = {
+		{
+			.addr = client->addr,
+			.flags = 0,
+			.len = IST30XX_ADDR_LEN,
+			.buf = (u8 *)&le_reg,
+		},
+		{
+			.addr = client->addr,
+			.flags = I2C_M_RD,
+			.len = len * IST30XX_DATA_LEN,
+			.buf = (u8 *)buf,
+		},
+	};
+
+	ret = ist30xx_i2c_transfer(client->adapter, msg, READ_CMD_MSG_LEN, NULL);
+	if (unlikely(ret != READ_CMD_MSG_LEN))
+		return -EIO;
+
+	for (i = 0; i < len; i++)
+		buf[i] = cpu_to_be32(buf[i]);
+
+	return 0;
+}
+
+int ist30xx_write_buf(struct i2c_client *client, u32 cmd, u32 *buf, u16 len)
+{
+	int i;
+	int ret;
+	struct i2c_msg msg;
+	u8 cmd_buf[IST30XX_ADDR_LEN];
+	u8 msg_buf[IST30XX_DATA_LEN * (len + 1)];
+
+	put_unaligned_be32(cmd, cmd_buf);
+
+	if (likely(len > 0)) {
+		for (i = 0; i < len; i++)
+			put_unaligned_be32(buf[i], msg_buf + (i * IST30XX_DATA_LEN));
+	} else {
+		/* then add dummy data(4byte) */
+		put_unaligned_be32(0, msg_buf);
+		len = 1;
+	}
+
+	msg.addr = client->addr;
+	msg.flags = 0;
+	msg.len = len * IST30XX_DATA_LEN;
+	msg.buf = msg_buf;
+
+	ret = ist30xx_i2c_transfer(client->adapter, &msg, WRITE_CMD_MSG_LEN,
+				   cmd_buf);
+	if (unlikely(ret != WRITE_CMD_MSG_LEN))
+		return -EIO;
+
+	return 0;
+}
+
+int ist30xx_read_reg(struct i2c_client *client, u32 reg, u32 *buf)
+{
+	int ret;
+	u32 le_reg = cpu_to_be32(reg);
+
+	struct i2c_msg msg[READ_CMD_MSG_LEN] = {
+		{
+			.addr = client->addr,
+			.flags = 0,
+			.len = IST30XX_ADDR_LEN,
+			.buf = (u8 *)&le_reg,
+		},
+		{
+			.addr = client->addr,
+			.flags = I2C_M_RD,
+			.len = IST30XX_DATA_LEN,
+			.buf = (u8 *)buf,
+		},
+	};
+
+	ret = i2c_transfer(client->adapter, msg, READ_CMD_MSG_LEN);
+	if (ret != READ_CMD_MSG_LEN) {
+		tsp_err("%s: i2c failed (%d), cmd: %x\n", __func__, ret, reg);
+		return -EIO;
+	}
+	*buf = cpu_to_be32(*buf);
+
+	return 0;
+}
+
+int ist30xx_read_cmd(struct ist30xx_data *data, u32 cmd, u32 *buf)
+{
+	int ret;
+
+	ret = ist30xx_cmd_hold(data->client, 1);
+	if (unlikely(ret))
+		return ret;
+
+	ist30xx_read_reg(data->client, IST30XX_DA_ADDR(cmd), buf);
+
+	ret = ist30xx_cmd_hold(data->client, 0);
+	if (unlikely(ret)) {
+		ist30xx_reset(data, false);
+		return ret;
+	}
+
+	return ret;
+}
+
+int ist30xx_write_cmd(struct i2c_client *client, u32 cmd, u32 val)
+{
+	int ret;
+
+	struct i2c_msg msg;
+	u8 msg_buf[IST30XX_ADDR_LEN + IST30XX_DATA_LEN];
+
+	put_unaligned_be32(cmd, msg_buf);
+	put_unaligned_be32(val, msg_buf + IST30XX_ADDR_LEN);
+
+	msg.addr = client->addr;
+	msg.flags = 0;
+	msg.len = IST30XX_ADDR_LEN + IST30XX_DATA_LEN;
+	msg.buf = msg_buf;
+
+	ret = i2c_transfer(client->adapter, &msg, WRITE_CMD_MSG_LEN);
+	if (ret != WRITE_CMD_MSG_LEN) {
+		tsp_err("%s: i2c failed (%d), cmd: %x(%x)\n", __func__, ret, cmd, val);
+		return -EIO;
+	}
+
+	msleep(40);
+
+	return 0;
+}
+
+int ist30xx_burst_read(struct i2c_client *client, u32 addr,
+			u32 *buf32, u16 len, bool bit_en)
+{
+	int ret = 0;
+	int i;
+	u16 max_len = I2C_MAX_READ_SIZE / IST30XX_DATA_LEN;
+	u16 remain_len = len;
+
+	if (bit_en)
+		addr = IST30XX_BA_ADDR(addr);
+
+	for (i = 0; i < len; i += max_len) {
+		if (remain_len < max_len) max_len = remain_len;
+
+		ret = ist30xx_read_buf(client, addr, buf32, max_len);
+		if (unlikely(ret)) {
+			tsp_err("Burst fail, addr: %x\n", __func__, addr);
+			return ret;
+		}
+
+		addr += max_len * IST30XX_DATA_LEN;
+		buf32 += max_len;
+		remain_len -= max_len;
+	}
+
+	return 0;
+}
+
+int ist30xx_burst_write(struct i2c_client *client, u32 addr,
+            u32 *buf32, u16 len)
+{
+	int ret = 0;
+	int i;
+	u16 max_len = I2C_MAX_WRITE_SIZE / IST30XX_DATA_LEN;
+	u16 remain_len = len;
+
+	addr = IST30XX_BA_ADDR(addr);
+
+	for (i = 0; i < len; i += max_len) {
+		if (remain_len < max_len) max_len = remain_len;
+
+		ret = ist30xx_write_buf(client, addr, buf32, max_len);
+		if (unlikely(ret)) {
+			tsp_err("Burst fail, addr: %x\n", __func__, addr);
+			return ret;
+		}
+
+		addr += max_len * IST30XX_DATA_LEN;
+		buf32 += max_len;
+		remain_len -= max_len;
+	}
+
+	return 0;
+}
+
+static struct regulator *touch_regulator;
+static void ts_power_enable(struct ist30xx_data *data, int en)
+{
+	struct i2c_client *client = data->client;
+	int ret;
+
+	tsp_info("%s %s\n", __func__, (en) ? "on" : "off");
+
+	if (touch_regulator == NULL) {
+		touch_regulator = regulator_get(&client->dev, ist_vdd_name);
+		if (IS_ERR(touch_regulator)) {
+			ret = PTR_ERR(touch_regulator);
+			dev_err(&client->dev,
+				"Failed to get vdd regulator(%d)\n", ret);
+			return ret;
+		}
+
+		ret = regulator_set_voltage(touch_regulator, 3000000, 3000000);
+		if (ret < 0) {
+			dev_err(&client->dev,
+				"Failed to set vdd regulator(%d)\n", ret);
+			regulator_put(touch_regulator);
+			touch_regulator = NULL;
+			return ret;
+		}
+	}
+
+	if (en){
+		if(data->status.power)
+			printk("%s:already enabled\n",__func__);
+		else
+			regulator_enable(touch_regulator);
+	}
+	else{
+		if(data->status.power)
+			regulator_disable(touch_regulator);
+		else
+			printk("%s:already disabled\n",__func__);
+	}
+}
+
+int ist30xx_power_on(struct ist30xx_data *data, bool download)
+{
+	if (data->status.power != 1) {
+		tsp_info("%s()\n", __func__);
+		ist30xx_tracking(TRACK_PWR_ON);
+		/* VDD enable */
+		ts_power_enable(data, 1);
+		if (download)
+			msleep(8);
+		else
+			msleep(50);
+
+		data->status.power = 1;
+	}
+
+	return 0;
+}
+
+int ist30xx_power_off(struct ist30xx_data *data)
+{
+	if (data->status.power != 0) {
+		tsp_info("%s()\n", __func__);
+		ist30xx_tracking(TRACK_PWR_OFF);
+		/* VDD disable */
+		ts_power_enable(data, 0);
+		msleep(50);
+		data->status.power = 0;
+		data->status.noise_mode = false;
+	}
+
+	return 0;
+}
+
+int ist30xx_reset(struct ist30xx_data *data, bool download)
+{
+	tsp_info("%s()\n", __func__);
+	ist30xx_power_off(data);
+	msleep(10);
+	ist30xx_power_on(data, download);
+
+	return 0;
+}
+
+int ist30xx_internal_suspend(struct ist30xx_data *data)
+{
+#if IST30XX_GESTURE
+	data->suspend = true;
+	if (data->gesture) {
+		ist30xx_reset(data, false);
+		ist30xx_cmd_gesture(data->client, 3);
+	} else {
+		ist30xx_power_off(data);
+	}
+#else
+	ist30xx_power_off(data);
+#endif
+	return 0;
+}
+
+int ist30xx_internal_resume(struct ist30xx_data *data)
+{
+#if IST30XX_GESTURE
+	data->suspend = false;
+	if (data->gesture)
+		ist30xx_reset(data, false);
+	else
+		ist30xx_power_on(data, false);
+#else
+	ist30xx_power_on(data, false);
+#endif
+
+	return 0;
+}
+
+int ist30xx_init_system(struct ist30xx_data *data)
+{
+	int ret;
+
+	// TODO : place additional code here.
+	ret = ist30xx_power_on(data, false);
+	if (ret) {
+		tsp_err("%s: ist30xx_init_system failed (%d)\n", __func__, ret);
+		return -EIO;
+	}
+
+	return 0;
+}