Add driver for goodix touchscreen from Bastien Nocera

3 files changed, 487 insertions, 0 deletions

diff --git a/Input-add-driver-for-the-Goodix-touchpanel.patch b/Input-add-driver-for-the-Goodix-touchpanel.patch
new file mode 100644
index 000000000..74cdd5509
--- /dev/null
+++ b/Input-add-driver-for-the-Goodix-touchpanel.patch
@@ -0,0 +1,479 @@
+From: Bastien Nocera <hadess@hadess.net>
+Date: Fri, 31 Oct 2014 09:26:16 -0700
+Subject: [PATCH] Input: add driver for the Goodix touchpanel
+
+Add a driver for the Goodix touchscreen panel found in Onda v975w tablets.
+The driver is based off the Android driver gt9xx.c found in some Android
+code dumps, but now bears no resemblance to the original driver.
+
+The driver was tested on the aforementioned tablet.
+
+Signed-off-by: Bastien Nocera <hadess@hadess.net>
+Tested-by: Bastien Nocera <hadess@hadess.net>
+Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
+Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
+---
+ MAINTAINERS                        |   6 +
+ drivers/input/touchscreen/Kconfig  |  13 ++
+ drivers/input/touchscreen/Makefile |   1 +
+ drivers/input/touchscreen/goodix.c | 395 +++++++++++++++++++++++++++++++++++++
+ 4 files changed, 415 insertions(+)
+ create mode 100644 drivers/input/touchscreen/goodix.c
+
+diff --git a/MAINTAINERS b/MAINTAINERS
+index 3c6427190be2..dc80b7d4eced 100644
+--- a/MAINTAINERS
++++ b/MAINTAINERS
+@@ -4138,6 +4138,12 @@ L:	linux-media@vger.kernel.org
+ S:	Maintained
+ F:	drivers/media/usb/go7007/
+ 
++GOODIX TOUCHSCREEN
++M:	Bastien Nocera <hadess@hadess.net>
++L:	linux-input@vger.kernel.org
++S:	Maintained
++F:	drivers/input/touchscreen/goodix.c
++
+ GPIO SUBSYSTEM
+ M:	Linus Walleij <linus.walleij@linaro.org>
+ M:	Alexandre Courbot <gnurou@gmail.com>
+diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
+index e1d8003d01f8..568a0200fbc2 100644
+--- a/drivers/input/touchscreen/Kconfig
++++ b/drivers/input/touchscreen/Kconfig
+@@ -295,6 +295,19 @@ config TOUCHSCREEN_FUJITSU
+ 	  To compile this driver as a module, choose M here: the
+ 	  module will be called fujitsu-ts.
+ 
++config TOUCHSCREEN_GOODIX
++	tristate "Goodix I2C touchscreen"
++	depends on I2C && ACPI
++	help
++	  Say Y here if you have the Goodix touchscreen (such as one
++	  installed in Onda v975w tablets) connected to your
++	  system.
++
++	  If unsure, say N.
++
++	  To compile this driver as a module, choose M here: the
++	  module will be called goodix.
++
+ config TOUCHSCREEN_ILI210X
+ 	tristate "Ilitek ILI210X based touchscreen"
+ 	depends on I2C
+diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
+index 090e61cc9171..dab4a56ac98e 100644
+--- a/drivers/input/touchscreen/Makefile
++++ b/drivers/input/touchscreen/Makefile
+@@ -34,6 +34,7 @@ obj-$(CONFIG_TOUCHSCREEN_EETI)		+= eeti_ts.o
+ obj-$(CONFIG_TOUCHSCREEN_ELO)		+= elo.o
+ obj-$(CONFIG_TOUCHSCREEN_EGALAX)	+= egalax_ts.o
+ obj-$(CONFIG_TOUCHSCREEN_FUJITSU)	+= fujitsu_ts.o
++obj-$(CONFIG_TOUCHSCREEN_GOODIX)	+= goodix.o
+ obj-$(CONFIG_TOUCHSCREEN_ILI210X)	+= ili210x.o
+ obj-$(CONFIG_TOUCHSCREEN_INEXIO)	+= inexio.o
+ obj-$(CONFIG_TOUCHSCREEN_INTEL_MID)	+= intel-mid-touch.o
+diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c
+new file mode 100644
+index 000000000000..ca196689f025
+--- /dev/null
++++ b/drivers/input/touchscreen/goodix.c
+@@ -0,0 +1,395 @@
++/*
++ *  Driver for Goodix Touchscreens
++ *
++ *  Copyright (c) 2014 Red Hat Inc.
++ *
++ *  This code is based on gt9xx.c authored by andrew@goodix.com:
++ *
++ *  2010 - 2012 Goodix Technology.
++ */
++
++/*
++ * 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; version 2 of the License.
++ */
++
++#include <linux/kernel.h>
++#include <linux/i2c.h>
++#include <linux/input.h>
++#include <linux/input/mt.h>
++#include <linux/module.h>
++#include <linux/delay.h>
++#include <linux/irq.h>
++#include <linux/interrupt.h>
++#include <linux/slab.h>
++#include <asm/unaligned.h>
++
++struct goodix_ts_data {
++	struct i2c_client *client;
++	struct input_dev *input_dev;
++	int abs_x_max;
++	int abs_y_max;
++	unsigned int max_touch_num;
++	unsigned int int_trigger_type;
++};
++
++#define GOODIX_MAX_HEIGHT		4096
++#define GOODIX_MAX_WIDTH		4096
++#define GOODIX_INT_TRIGGER		1
++#define GOODIX_CONTACT_SIZE		8
++#define GOODIX_MAX_CONTACTS		10
++
++#define GOODIX_CONFIG_MAX_LENGTH	240
++
++/* Register defines */
++#define GOODIX_READ_COOR_ADDR		0x814E
++#define GOODIX_REG_CONFIG_DATA		0x8047
++#define GOODIX_REG_VERSION		0x8140
++
++#define RESOLUTION_LOC		1
++#define TRIGGER_LOC		6
++
++static const unsigned long goodix_irq_flags[] = {
++	IRQ_TYPE_EDGE_RISING,
++	IRQ_TYPE_EDGE_FALLING,
++	IRQ_TYPE_LEVEL_LOW,
++	IRQ_TYPE_LEVEL_HIGH,
++};
++
++/**
++ * goodix_i2c_read - read data from a register of the i2c slave device.
++ *
++ * @client: i2c device.
++ * @reg: the register to read from.
++ * @buf: raw write data buffer.
++ * @len: length of the buffer to write
++ */
++static int goodix_i2c_read(struct i2c_client *client,
++				u16 reg, u8 *buf, int len)
++{
++	struct i2c_msg msgs[2];
++	u16 wbuf = cpu_to_be16(reg);
++	int ret;
++
++	msgs[0].flags = 0;
++	msgs[0].addr  = client->addr;
++	msgs[0].len   = 2;
++	msgs[0].buf   = (u8 *) &wbuf;
++
++	msgs[1].flags = I2C_M_RD;
++	msgs[1].addr  = client->addr;
++	msgs[1].len   = len;
++	msgs[1].buf   = buf;
++
++	ret = i2c_transfer(client->adapter, msgs, 2);
++	return ret < 0 ? ret : (ret != ARRAY_SIZE(msgs) ? -EIO : 0);
++}
++
++static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data)
++{
++	int touch_num;
++	int error;
++
++	error = goodix_i2c_read(ts->client, GOODIX_READ_COOR_ADDR, data,
++				GOODIX_CONTACT_SIZE + 1);
++	if (error) {
++		dev_err(&ts->client->dev, "I2C transfer error: %d\n", error);
++		return error;
++	}
++
++	touch_num = data[0] & 0x0f;
++	if (touch_num > GOODIX_MAX_CONTACTS)
++		return -EPROTO;
++
++	if (touch_num > 1) {
++		data += 1 + GOODIX_CONTACT_SIZE;
++		error = goodix_i2c_read(ts->client,
++					GOODIX_READ_COOR_ADDR +
++						1 + GOODIX_CONTACT_SIZE,
++					data,
++					GOODIX_CONTACT_SIZE * (touch_num - 1));
++		if (error)
++			return error;
++	}
++
++	return touch_num;
++}
++
++static void goodix_ts_report_touch(struct goodix_ts_data *ts, u8 *coor_data)
++{
++	int id = coor_data[0] & 0x0F;
++	int input_x = get_unaligned_le16(&coor_data[1]);
++	int input_y = get_unaligned_le16(&coor_data[3]);
++	int input_w = get_unaligned_le16(&coor_data[5]);
++
++	input_mt_slot(ts->input_dev, id);
++	input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true);
++	input_report_abs(ts->input_dev, ABS_MT_POSITION_X, input_x);
++	input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, input_y);
++	input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w);
++	input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w);
++}
++
++/**
++ * goodix_process_events - Process incoming events
++ *
++ * @ts: our goodix_ts_data pointer
++ *
++ * Called when the IRQ is triggered. Read the current device state, and push
++ * the input events to the user space.
++ */
++static void goodix_process_events(struct goodix_ts_data *ts)
++{
++	u8  point_data[1 + GOODIX_CONTACT_SIZE * GOODIX_MAX_CONTACTS];
++	int touch_num;
++	int i;
++
++	touch_num = goodix_ts_read_input_report(ts, point_data);
++	if (touch_num < 0)
++		return;
++
++	for (i = 0; i < touch_num; i++)
++		goodix_ts_report_touch(ts,
++				&point_data[1 + GOODIX_CONTACT_SIZE * i]);
++
++	input_mt_sync_frame(ts->input_dev);
++	input_sync(ts->input_dev);
++}
++
++/**
++ * goodix_ts_irq_handler - The IRQ handler
++ *
++ * @irq: interrupt number.
++ * @dev_id: private data pointer.
++ */
++static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id)
++{
++	static const u8 end_cmd[] = {
++		GOODIX_READ_COOR_ADDR >> 8,
++		GOODIX_READ_COOR_ADDR & 0xff,
++		0
++	};
++	struct goodix_ts_data *ts = dev_id;
++
++	goodix_process_events(ts);
++
++	if (i2c_master_send(ts->client, end_cmd, sizeof(end_cmd)) < 0)
++		dev_err(&ts->client->dev, "I2C write end_cmd error\n");
++
++	return IRQ_HANDLED;
++}
++
++/**
++ * goodix_read_config - Read the embedded configuration of the panel
++ *
++ * @ts: our goodix_ts_data pointer
++ *
++ * Must be called during probe
++ */
++static void goodix_read_config(struct goodix_ts_data *ts)
++{
++	u8 config[GOODIX_CONFIG_MAX_LENGTH];
++	int error;
++
++	error = goodix_i2c_read(ts->client, GOODIX_REG_CONFIG_DATA,
++			      config,
++			   GOODIX_CONFIG_MAX_LENGTH);
++	if (error) {
++		dev_warn(&ts->client->dev,
++			 "Error reading config (%d), using defaults\n",
++			 error);
++		ts->abs_x_max = GOODIX_MAX_WIDTH;
++		ts->abs_y_max = GOODIX_MAX_HEIGHT;
++		ts->int_trigger_type = GOODIX_INT_TRIGGER;
++		return;
++	}
++
++	ts->abs_x_max = get_unaligned_le16(&config[RESOLUTION_LOC]);
++	ts->abs_y_max = get_unaligned_le16(&config[RESOLUTION_LOC + 2]);
++	ts->int_trigger_type = (config[TRIGGER_LOC]) & 0x03;
++	if (!ts->abs_x_max || !ts->abs_y_max) {
++		dev_err(&ts->client->dev,
++			"Invalid config, using defaults\n");
++		ts->abs_x_max = GOODIX_MAX_WIDTH;
++		ts->abs_y_max = GOODIX_MAX_HEIGHT;
++	}
++}
++
++
++/**
++ * goodix_read_version - Read goodix touchscreen version
++ *
++ * @client: the i2c client
++ * @version: output buffer containing the version on success
++ */
++static int goodix_read_version(struct i2c_client *client, u16 *version)
++{
++	int error;
++	u8 buf[6];
++
++	error = goodix_i2c_read(client, GOODIX_REG_VERSION, buf, sizeof(buf));
++	if (error) {
++		dev_err(&client->dev, "read version failed: %d\n", error);
++		return error;
++	}
++
++	if (version)
++		*version = get_unaligned_le16(&buf[4]);
++
++	dev_info(&client->dev, "IC VERSION: %6ph\n", buf);
++
++	return 0;
++}
++
++/**
++ * goodix_i2c_test - I2C test function to check if the device answers.
++ *
++ * @client: the i2c client
++ */
++static int goodix_i2c_test(struct i2c_client *client)
++{
++	int retry = 0;
++	int error;
++	u8 test;
++
++	while (retry++ < 2) {
++		error = goodix_i2c_read(client, GOODIX_REG_CONFIG_DATA,
++					&test, 1);
++		if (!error)
++			return 0;
++
++		dev_err(&client->dev, "i2c test failed attempt %d: %d\n",
++			retry, error);
++		msleep(20);
++	}
++
++	return error;
++}
++
++/**
++ * goodix_request_input_dev - Allocate, populate and register the input device
++ *
++ * @ts: our goodix_ts_data pointer
++ *
++ * Must be called during probe
++ */
++static int goodix_request_input_dev(struct goodix_ts_data *ts)
++{
++	int error;
++
++	ts->input_dev = devm_input_allocate_device(&ts->client->dev);
++	if (!ts->input_dev) {
++		dev_err(&ts->client->dev, "Failed to allocate input device.");
++		return -ENOMEM;
++	}
++
++	ts->input_dev->evbit[0] = BIT_MASK(EV_SYN) |
++				  BIT_MASK(EV_KEY) |
++				  BIT_MASK(EV_ABS);
++
++	input_set_abs_params(ts->input_dev, ABS_MT_POSITION_X, 0,
++				ts->abs_x_max, 0, 0);
++	input_set_abs_params(ts->input_dev, ABS_MT_POSITION_Y, 0,
++				ts->abs_y_max, 0, 0);
++	input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0);
++	input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
++
++	input_mt_init_slots(ts->input_dev, GOODIX_MAX_CONTACTS,
++			    INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
++
++	ts->input_dev->name = "Goodix Capacitive TouchScreen";
++	ts->input_dev->phys = "input/ts";
++	ts->input_dev->id.bustype = BUS_I2C;
++	ts->input_dev->id.vendor = 0x0416;
++	ts->input_dev->id.product = 0x1001;
++	ts->input_dev->id.version = 10427;
++
++	error = input_register_device(ts->input_dev);
++	if (error) {
++		dev_err(&ts->client->dev,
++			"Failed to register input device: %d", error);
++		return error;
++	}
++
++	return 0;
++}
++
++static int goodix_ts_probe(struct i2c_client *client,
++			   const struct i2c_device_id *id)
++{
++	struct goodix_ts_data *ts;
++	unsigned long irq_flags;
++	int error;
++	u16 version_info;
++
++	dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr);
++
++	if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
++		dev_err(&client->dev, "I2C check functionality failed.\n");
++		return -ENXIO;
++	}
++
++	ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL);
++	if (!ts)
++		return -ENOMEM;
++
++	ts->client = client;
++	i2c_set_clientdata(client, ts);
++
++	error = goodix_i2c_test(client);
++	if (error) {
++		dev_err(&client->dev, "I2C communication failure: %d\n", error);
++		return error;
++	}
++
++	error = goodix_read_version(client, &version_info);
++	if (error) {
++		dev_err(&client->dev, "Read version failed.\n");
++		return error;
++	}
++
++	goodix_read_config(ts);
++
++	error = goodix_request_input_dev(ts);
++	if (error)
++		return error;
++
++	irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT;
++	error = devm_request_threaded_irq(&ts->client->dev, client->irq,
++					  NULL, goodix_ts_irq_handler,
++					  irq_flags, client->name, ts);
++	if (error) {
++		dev_err(&client->dev, "request IRQ failed: %d\n", error);
++		return error;
++	}
++
++	return 0;
++}
++
++static const struct i2c_device_id goodix_ts_id[] = {
++	{ "GDIX1001:00", 0 },
++	{ }
++};
++
++static const struct acpi_device_id goodix_acpi_match[] = {
++	{ "GDIX1001", 0 },
++	{ }
++};
++MODULE_DEVICE_TABLE(acpi, goodix_acpi_match);
++
++static struct i2c_driver goodix_ts_driver = {
++	.probe = goodix_ts_probe,
++	.id_table = goodix_ts_id,
++	.driver = {
++		.name = "Goodix-TS",
++		.owner = THIS_MODULE,
++		.acpi_match_table = goodix_acpi_match,
++	},
++};
++module_i2c_driver(goodix_ts_driver);
++
++MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>");
++MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>");
++MODULE_DESCRIPTION("Goodix touchscreen driver");
++MODULE_LICENSE("GPL v2");
+-- 
+1.9.3
+
diff --git a/config-x86-generic b/config-x86-generic
index 59217f12b..c7a27d6a0 100644
--- a/config-x86-generic
+++ b/config-x86-generic
@@ -240,6 +240,7 @@ CONFIG_INTEL_SMARTCONNECT=y
 CONFIG_PVPANIC=m
 
 # CONFIG_TOUCHSCREEN_INTEL_MID is not set
+CONFIG_TOUCHSCREEN_GOODIX=m
 
 # CONFIG_SMSC37B787_WDT is not set
 CONFIG_VIA_WDT=m
diff --git a/kernel.spec b/kernel.spec
index 3f795005f..e059fa892 100644
--- a/kernel.spec
+++ b/kernel.spec
@@ -622,6 +622,8 @@ Patch26062: quirk-for-Lenovo-Yoga-3-no-rfkill-switch.patch
 #rhbz 1158204 1157157
 Patch26063: x86-microcode-AMD-Fix-early-ucode-loading-on-32-bit.patch
 
+Patch26064: Input-add-driver-for-the-Goodix-touchpanel.patch
+
 # git clone ssh://git.fedorahosted.org/git/kernel-arm64.git, git diff master...devel
 Patch30000: kernel-arm64.patch
 
@@ -1353,6 +1355,8 @@ ApplyPatch quirk-for-Lenovo-Yoga-3-no-rfkill-switch.patch
 #rhbz 1158204 1157157
 ApplyPatch x86-microcode-AMD-Fix-early-ucode-loading-on-32-bit.patch
 
+ApplyPatch Input-add-driver-for-the-Goodix-touchpanel.patch
+
 %if 0%{?aarch64patches}
 ApplyPatch kernel-arm64.patch
 %ifnarch aarch64 # this is stupid, but i want to notice before secondary koji does.
@@ -2221,6 +2225,9 @@ fi
 #                                    ||----w |
 #                                    ||     ||
 %changelog
+* Mon Nov 03 2014 Josh Boyer <jwboyer@fedoraproject.org>
+- Add driver for goodix touchscreen from Bastien Nocera
+
 * Mon Nov 03 2014 Josh Boyer <jwboyer@fedoraproject.org> - 3.18.0-0.rc3.git0.1
 - Linux v3.18-rc3
 - Disable debugging options.