1 files changed, 278 insertions, 0 deletions

diff --git a/drivers/input/touchscreen/cyttsp4_i2c.c b/drivers/input/touchscreen/cyttsp4_i2c.c
new file mode 100644
index 0000000..8ed2073
--- /dev/null
+++ b/drivers/input/touchscreen/cyttsp4_i2c.c
@@ -0,0 +1,278 @@
+/*
+ * Source for:
+ * Cypress TrueTouch(TM) Standard Product (TTSP) I2C touchscreen driver.
+ * For use with Cypress Gen4 and Solo parts.
+ * Supported parts include:
+ * CY8CTMA884/616
+ * CY8CTMA4XX
+ *
+ * Copyright (C) 2009-2012 Cypress Semiconductor, Inc.
+ * Copyright (C) 2011 Motorola Mobility, Inc.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2, and only version 2, as published by the
+ * Free Software Foundation.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * Contact Cypress Semiconductor at www.cypress.com <kev@cypress.com>
+ *
+ */
+
+#include "cyttsp4_core.h"
+
+#include <linux/i2c.h>
+#include <linux/slab.h>
+/* key led */
+#include <linux/regulator/consumer.h>
+#define PRESS_KEY 1	/* Fixed value */
+#define RELEASE_KEY 0	/* Fixed value */
+static int led_status;
+extern struct class *sec_class;
+
+#define CY_I2C_DATA_SIZE  (3 * 256)
+
+struct cyttsp4_i2c {
+	struct cyttsp4_bus_ops ops;
+	struct i2c_client *client;
+	void *ttsp_client;
+	u8 wr_buf[CY_I2C_DATA_SIZE];
+};
+
+/* key led */
+static ssize_t touchkey_led_control(struct device *dev,
+		struct device_attribute *attr, const char *buf,
+		size_t size)
+{
+	struct regulator *vreg_led = NULL;
+	int ret;
+	int data;
+	sscanf(buf, "%d\n", &data);
+
+	pr_info("[TSP] %s : LED buf is %d\n", __func__, data);
+
+	if (vreg_led == NULL) {
+		vreg_led = regulator_get(NULL, "KEYLED_3P3V");
+		if (IS_ERR(vreg_led)) {
+			pr_err("tsp: Fail to register vreg_led(KEYLED_3P3V) in touch driver\n");
+			return size;
+		}
+	}
+	if (data == 1 && led_status == 0) {
+		ret = regulator_enable(vreg_led);
+		if (ret)
+			pr_err("tsp: Fail to enable led\n");
+		led_status = 1;
+	} else if (data == 2 && led_status == 1) {
+		ret = regulator_disable(vreg_led);
+		if (ret)
+			pr_err("tsp: Fail to disable led\n");
+		led_status = 0;
+	}
+
+	return size;
+}
+static DEVICE_ATTR(brightness, S_IRUGO | S_IWUSR | S_IWGRP, NULL,
+		touchkey_led_control);
+
+static s32 cyttsp4_i2c_read_block_data(void *handle, u16 subaddr,
+	size_t length, void *values, int i2c_addr, bool use_subaddr)
+{
+	struct cyttsp4_i2c *ts = container_of(handle, struct cyttsp4_i2c, ops);
+	int retval = 0;
+	u8 sub_addr[2];
+	int subaddr_len;
+
+	if (use_subaddr) {
+		subaddr_len = 1;
+		sub_addr[0] = subaddr;
+	}
+
+	ts->client->addr = i2c_addr;
+	if (!use_subaddr)
+		goto read_packet;
+
+	/* write subaddr */
+	retval = i2c_master_send(ts->client, sub_addr, subaddr_len);
+	if (retval < 0)
+		return retval;
+	else if (retval != subaddr_len)
+		return -EIO;
+
+read_packet:
+	retval = i2c_master_recv(ts->client, values, length);
+
+	return (retval < 0) ? retval : retval != length ? -EIO : 0;
+}
+
+static s32 cyttsp4_i2c_write_block_data(void *handle, u16 subaddr,
+	size_t length, const void *values, int i2c_addr, bool use_subaddr)
+{
+	struct cyttsp4_i2c *ts = container_of(handle, struct cyttsp4_i2c, ops);
+	int retval;
+
+	if (use_subaddr) {
+		ts->wr_buf[0] = subaddr;
+		memcpy(&ts->wr_buf[1], values, length);
+		length += 1;
+	} else {
+		memcpy(&ts->wr_buf[0], values, length);
+	}
+	ts->client->addr = i2c_addr;
+	retval = i2c_master_send(ts->client, ts->wr_buf, length);
+
+	return (retval < 0) ? retval : retval != length ? -EIO : 0;
+}
+
+static int __devinit cyttsp4_i2c_probe(struct i2c_client *client,
+	const struct i2c_device_id *id)
+{
+	struct regulator *vreg_led = NULL;
+	struct cyttsp4_i2c *ts;
+	int retval = 0;
+	/* key led */
+	struct device *sec_touchkey;
+
+	pr_info("%s: Starting %s probe...\n", __func__, CY_I2C_NAME);
+
+	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+		pr_err("%s: fail check I2C functionality\n", __func__);
+		retval = -EIO;
+		goto cyttsp4_i2c_probe_exit;
+	}
+
+	/* allocate and clear memory */
+	ts = kzalloc(sizeof(struct cyttsp4_i2c), GFP_KERNEL);
+	if (ts == NULL) {
+		pr_err("%s: Error, kzalloc.\n", __func__);
+		retval = -ENOMEM;
+		goto cyttsp4_i2c_probe_exit;
+	}
+
+	/* register driver_data */
+	ts->client = client;
+	i2c_set_clientdata(client, ts);
+	ts->ops.write = cyttsp4_i2c_write_block_data;
+	ts->ops.read = cyttsp4_i2c_read_block_data;
+	ts->ops.dev = &client->dev;
+	ts->ops.dev->bus = &i2c_bus_type;
+
+	ts->ttsp_client = cyttsp4_core_init(&ts->ops, &client->dev,
+		client->irq, client->name);
+
+	if (ts->ttsp_client == NULL) {
+		kfree(ts);
+		ts = NULL;
+		retval = -ENODATA;
+		pr_err("%s: Registration fail ret=%d\n", __func__, retval);
+		goto cyttsp4_i2c_probe_exit;
+	}
+
+	dev_info(ts->ops.dev,
+			"%s: Registration complete\n", __func__);
+
+	/* key led */
+	vreg_led = regulator_get(NULL, "KEYLED_3P3V");
+	if (IS_ERR(vreg_led))
+		goto err_vreg_led;
+	led_status = 0;
+	sec_touchkey = device_create(sec_class, NULL, 0, NULL, "sec_touchkey");
+	if (device_create_file(sec_touchkey,
+				&dev_attr_brightness) < 0) {
+		pr_err("Failed to create device file(%s)!\n",
+				dev_attr_brightness.attr.name);
+	}
+
+	return 0;
+
+cyttsp4_i2c_probe_exit:
+	return retval;
+
+err_vreg_led:
+	pr_err("tsp: Fail to register vreg_led(KEYLED_3P3V) in touch driver\n");
+	regulator_put(vreg_led);
+	return retval;
+}
+
+/* registered in driver struct */
+static int __devexit cyttsp4_i2c_remove(struct i2c_client *client)
+{
+	struct regulator *vreg_led = NULL;
+	struct cyttsp4_i2c *ts;
+
+	ts = i2c_get_clientdata(client);
+	cyttsp4_core_release(ts->ttsp_client);
+	kfree(ts);
+	regulator_put(vreg_led);
+	return 0;
+}
+
+#if !defined(CONFIG_HAS_EARLYSUSPEND) && !defined(CONFIG_PM_SLEEP)
+#if defined(CONFIG_PM)
+static int cyttsp4_i2c_suspend(struct i2c_client *client, pm_message_t message)
+{
+	struct cyttsp4_i2c *ts = i2c_get_clientdata(client);
+
+	return cyttsp4_suspend(ts);
+}
+
+static int cyttsp4_i2c_resume(struct i2c_client *client)
+{
+	struct cyttsp4_i2c *ts = i2c_get_clientdata(client);
+
+	return cyttsp4_resume(ts);
+}
+#endif
+#endif
+
+static const struct i2c_device_id cyttsp4_i2c_id[] = {
+	{ CY_I2C_NAME, 0 },  { }
+};
+
+static struct i2c_driver cyttsp4_i2c_driver = {
+	.driver = {
+		.name = CY_I2C_NAME,
+		.owner = THIS_MODULE,
+#if !defined(CONFIG_HAS_EARLYSUSPEND)
+#if defined(CONFIG_PM_SLEEP)
+		.pm = &cyttsp4_pm_ops,
+#endif
+#endif
+	},
+	.probe = cyttsp4_i2c_probe,
+	.remove = __devexit_p(cyttsp4_i2c_remove),
+	.id_table = cyttsp4_i2c_id,
+#if !defined(CONFIG_HAS_EARLYSUSPEND) && !defined(CONFIG_PM_SLEEP)
+#if defined(CONFIG_PM)
+	.suspend = cyttsp4_i2c_suspend,
+	.resume = cyttsp4_i2c_resume,
+#endif
+#endif
+};
+
+static int __init cyttsp4_i2c_init(void)
+{
+	return i2c_add_driver(&cyttsp4_i2c_driver);
+}
+
+static void __exit cyttsp4_i2c_exit(void)
+{
+	return i2c_del_driver(&cyttsp4_i2c_driver);
+}
+
+module_init(cyttsp4_i2c_init);
+module_exit(cyttsp4_i2c_exit);
+
+MODULE_ALIAS(CY_I2C_NAME);
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
+MODULE_AUTHOR("Cypress");
+MODULE_DEVICE_TABLE(i2c, cyttsp4_i2c_id);