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Diffstat (limited to 'target/linux/brcm2708/patches-4.1/0205-Input-add-support-for-FocalTech-FT6236-touchscreen-c.patch')
-rw-r--r--target/linux/brcm2708/patches-4.1/0205-Input-add-support-for-FocalTech-FT6236-touchscreen-c.patch434
1 files changed, 0 insertions, 434 deletions
diff --git a/target/linux/brcm2708/patches-4.1/0205-Input-add-support-for-FocalTech-FT6236-touchscreen-c.patch b/target/linux/brcm2708/patches-4.1/0205-Input-add-support-for-FocalTech-FT6236-touchscreen-c.patch
deleted file mode 100644
index 3396f172ad..0000000000
--- a/target/linux/brcm2708/patches-4.1/0205-Input-add-support-for-FocalTech-FT6236-touchscreen-c.patch
+++ /dev/null
@@ -1,434 +0,0 @@
-From 75a6299867667a481a12f3c833322e39ff4fb089 Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
-Date: Fri, 2 Oct 2015 11:30:11 -0700
-Subject: [PATCH 205/222] Input: add support for FocalTech FT6236 touchscreen
- controller
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-This adds support for the FT6x06 and the FT6x36 family of capacitive touch
-panel controllers, in particular the FT6236.
-
-Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
-Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
----
- .../input/touchscreen/focaltech-ft6236.txt | 35 +++
- .../devicetree/bindings/vendor-prefixes.txt | 1 +
- drivers/input/touchscreen/Kconfig | 13 +
- drivers/input/touchscreen/Makefile | 1 +
- drivers/input/touchscreen/ft6236.c | 327 +++++++++++++++++++++
- 5 files changed, 377 insertions(+)
- create mode 100644 Documentation/devicetree/bindings/input/touchscreen/focaltech-ft6236.txt
- create mode 100644 drivers/input/touchscreen/ft6236.c
-
---- /dev/null
-+++ b/Documentation/devicetree/bindings/input/touchscreen/focaltech-ft6236.txt
-@@ -0,0 +1,35 @@
-+* FocalTech FT6236 I2C touchscreen controller
-+
-+Required properties:
-+ - compatible : "focaltech,ft6236"
-+ - reg : I2C slave address of the chip (0x38)
-+ - interrupt-parent : a phandle pointing to the interrupt controller
-+ serving the interrupt for this chip
-+ - interrupts : interrupt specification for the touch controller
-+ interrupt
-+ - reset-gpios : GPIO specification for the RSTN input
-+ - touchscreen-size-x : horizontal resolution of touchscreen (in pixels)
-+ - touchscreen-size-y : vertical resolution of touchscreen (in pixels)
-+
-+Optional properties:
-+ - touchscreen-fuzz-x : horizontal noise value of the absolute input
-+ device (in pixels)
-+ - touchscreen-fuzz-y : vertical noise value of the absolute input
-+ device (in pixels)
-+ - touchscreen-inverted-x : X axis is inverted (boolean)
-+ - touchscreen-inverted-y : Y axis is inverted (boolean)
-+ - touchscreen-swapped-x-y: X and Y axis are swapped (boolean)
-+ Swapping is done after inverting the axis
-+
-+Example:
-+
-+ ft6x06@38 {
-+ compatible = "focaltech,ft6236";
-+ reg = <0x38>;
-+ interrupt-parent = <&gpio>;
-+ interrupts = <23 2>;
-+ touchscreen-size-x = <320>;
-+ touchscreen-size-y = <480>;
-+ touchscreen-inverted-x;
-+ touchscreen-swapped-x-y;
-+ };
---- a/Documentation/devicetree/bindings/vendor-prefixes.txt
-+++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
-@@ -76,6 +76,7 @@ everspin Everspin Technologies, Inc.
- excito Excito
- fcs Fairchild Semiconductor
- firefly Firefly
-+focaltech FocalTech Systems Co.,Ltd
- fsl Freescale Semiconductor
- GEFanuc GE Fanuc Intelligent Platforms Embedded Systems, Inc.
- gef GE Fanuc Intelligent Platforms Embedded Systems, Inc.
---- a/drivers/input/touchscreen/Kconfig
-+++ b/drivers/input/touchscreen/Kconfig
-@@ -295,6 +295,19 @@ config TOUCHSCREEN_EGALAX
- To compile this driver as a module, choose M here: the
- module will be called egalax_ts.
-
-+config TOUCHSCREEN_FT6236
-+ tristate "FT6236 I2C touchscreen"
-+ depends on I2C
-+ depends on GPIOLIB || COMPILE_TEST
-+ help
-+ Say Y here to enable support for the I2C connected FT6x06 and
-+ FT6x36 family of capacitive touchscreen drivers.
-+
-+ If unsure, say N.
-+
-+ To compile this driver as a module, choose M here: the
-+ module will be called ft6236.
-+
- config TOUCHSCREEN_FUJITSU
- tristate "Fujitsu serial touchscreen"
- select SERIO
---- a/drivers/input/touchscreen/Makefile
-+++ b/drivers/input/touchscreen/Makefile
-@@ -36,6 +36,7 @@ obj-$(CONFIG_TOUCHSCREEN_EETI) += eeti_
- obj-$(CONFIG_TOUCHSCREEN_ELAN) += elants_i2c.o
- obj-$(CONFIG_TOUCHSCREEN_ELO) += elo.o
- obj-$(CONFIG_TOUCHSCREEN_EGALAX) += egalax_ts.o
-+obj-$(CONFIG_TOUCHSCREEN_FT6236) += ft6236.o
- obj-$(CONFIG_TOUCHSCREEN_FUJITSU) += fujitsu_ts.o
- obj-$(CONFIG_TOUCHSCREEN_GOODIX) += goodix.o
- obj-$(CONFIG_TOUCHSCREEN_ILI210X) += ili210x.o
---- /dev/null
-+++ b/drivers/input/touchscreen/ft6236.c
-@@ -0,0 +1,327 @@
-+/*
-+ * FocalTech FT6236 TouchScreen driver.
-+ *
-+ * Copyright (c) 2010 Focal 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/delay.h>
-+#include <linux/gpio/consumer.h>
-+#include <linux/i2c.h>
-+#include <linux/input.h>
-+#include <linux/input/mt.h>
-+#include <linux/interrupt.h>
-+#include <linux/module.h>
-+#include <linux/property.h>
-+
-+#define FT6236_MAX_TOUCH_POINTS 2
-+
-+#define FT6236_REG_TH_GROUP 0x80
-+#define FT6236_REG_PERIODACTIVE 0x88
-+#define FT6236_REG_LIB_VER_H 0xa1
-+#define FT6236_REG_LIB_VER_L 0xa2
-+#define FT6236_REG_CIPHER 0xa3
-+#define FT6236_REG_FIRMID 0xa6
-+#define FT6236_REG_FOCALTECH_ID 0xa8
-+#define FT6236_REG_RELEASE_CODE_ID 0xaf
-+
-+#define FT6236_EVENT_PRESS_DOWN 0
-+#define FT6236_EVENT_LIFT_UP 1
-+#define FT6236_EVENT_CONTACT 2
-+#define FT6236_EVENT_NO_EVENT 3
-+
-+struct ft6236_data {
-+ struct i2c_client *client;
-+ struct input_dev *input;
-+ struct gpio_desc *reset_gpio;
-+ u32 max_x;
-+ u32 max_y;
-+ bool invert_x;
-+ bool invert_y;
-+ bool swap_xy;
-+};
-+
-+/*
-+ * This struct is a touchpoint as stored in hardware. Note that the id,
-+ * as well as the event, are stored in the upper nybble of the hi byte.
-+ */
-+struct ft6236_touchpoint {
-+ union {
-+ u8 xhi;
-+ u8 event;
-+ };
-+ u8 xlo;
-+ union {
-+ u8 yhi;
-+ u8 id;
-+ };
-+ u8 ylo;
-+ u8 weight;
-+ u8 misc;
-+} __packed;
-+
-+/* This packet represents the register map as read from offset 0 */
-+struct ft6236_packet {
-+ u8 dev_mode;
-+ u8 gest_id;
-+ u8 touches;
-+ struct ft6236_touchpoint points[FT6236_MAX_TOUCH_POINTS];
-+} __packed;
-+
-+static int ft6236_read(struct i2c_client *client, u8 reg, u8 len, void *data)
-+{
-+ int error;
-+
-+ error = i2c_smbus_read_i2c_block_data(client, reg, len, data);
-+ if (error < 0)
-+ return error;
-+
-+ if (error != len)
-+ return -EIO;
-+
-+ return 0;
-+}
-+
-+static irqreturn_t ft6236_interrupt(int irq, void *dev_id)
-+{
-+ struct ft6236_data *ft6236 = dev_id;
-+ struct device *dev = &ft6236->client->dev;
-+ struct input_dev *input = ft6236->input;
-+ struct ft6236_packet buf;
-+ u8 touches;
-+ int i, error;
-+
-+ error = ft6236_read(ft6236->client, 0, sizeof(buf), &buf);
-+ if (error) {
-+ dev_err(dev, "read touchdata failed %d\n", error);
-+ return IRQ_HANDLED;
-+ }
-+
-+ touches = buf.touches & 0xf;
-+ if (touches > FT6236_MAX_TOUCH_POINTS) {
-+ dev_dbg(dev,
-+ "%d touch points reported, only %d are supported\n",
-+ touches, FT6236_MAX_TOUCH_POINTS);
-+ touches = FT6236_MAX_TOUCH_POINTS;
-+ }
-+
-+ for (i = 0; i < touches; i++) {
-+ struct ft6236_touchpoint *point = &buf.points[i];
-+ u16 x = ((point->xhi & 0xf) << 8) | buf.points[i].xlo;
-+ u16 y = ((point->yhi & 0xf) << 8) | buf.points[i].ylo;
-+ u8 event = point->event >> 6;
-+ u8 id = point->id >> 4;
-+ bool act = (event == FT6236_EVENT_PRESS_DOWN ||
-+ event == FT6236_EVENT_CONTACT);
-+
-+ input_mt_slot(input, id);
-+ input_mt_report_slot_state(input, MT_TOOL_FINGER, act);
-+ if (!act)
-+ continue;
-+
-+ if (ft6236->invert_x)
-+ x = ft6236->max_x - x;
-+
-+ if (ft6236->invert_y)
-+ y = ft6236->max_y - y;
-+
-+ if (ft6236->swap_xy) {
-+ input_report_abs(input, ABS_MT_POSITION_X, y);
-+ input_report_abs(input, ABS_MT_POSITION_Y, x);
-+ } else {
-+ input_report_abs(input, ABS_MT_POSITION_X, x);
-+ input_report_abs(input, ABS_MT_POSITION_Y, y);
-+ }
-+ }
-+
-+ input_mt_sync_frame(input);
-+ input_sync(input);
-+
-+ return IRQ_HANDLED;
-+}
-+
-+static u8 ft6236_debug_read_byte(struct ft6236_data *ft6236, u8 reg)
-+{
-+ struct i2c_client *client = ft6236->client;
-+ u8 val = 0;
-+ int error;
-+
-+ error = ft6236_read(client, reg, 1, &val);
-+ if (error)
-+ dev_dbg(&client->dev,
-+ "error reading register 0x%02x: %d\n", reg, error);
-+
-+ return val;
-+}
-+
-+static void ft6236_debug_info(struct ft6236_data *ft6236)
-+{
-+ struct device *dev = &ft6236->client->dev;
-+
-+ dev_dbg(dev, "Touch threshold is %d\n",
-+ ft6236_debug_read_byte(ft6236, FT6236_REG_TH_GROUP) * 4);
-+ dev_dbg(dev, "Report rate is %dHz\n",
-+ ft6236_debug_read_byte(ft6236, FT6236_REG_PERIODACTIVE) * 10);
-+ dev_dbg(dev, "Firmware library version 0x%02x%02x\n",
-+ ft6236_debug_read_byte(ft6236, FT6236_REG_LIB_VER_H),
-+ ft6236_debug_read_byte(ft6236, FT6236_REG_LIB_VER_L));
-+ dev_dbg(dev, "Firmware version 0x%02x\n",
-+ ft6236_debug_read_byte(ft6236, FT6236_REG_FIRMID));
-+ dev_dbg(dev, "Chip vendor ID 0x%02x\n",
-+ ft6236_debug_read_byte(ft6236, FT6236_REG_CIPHER));
-+ dev_dbg(dev, "CTPM vendor ID 0x%02x\n",
-+ ft6236_debug_read_byte(ft6236, FT6236_REG_FOCALTECH_ID));
-+ dev_dbg(dev, "Release code version 0x%02x\n",
-+ ft6236_debug_read_byte(ft6236, FT6236_REG_RELEASE_CODE_ID));
-+}
-+
-+static void ft6236_reset(struct ft6236_data *ft6236)
-+{
-+ if (!ft6236->reset_gpio)
-+ return;
-+
-+ gpiod_set_value_cansleep(ft6236->reset_gpio, 1);
-+ usleep_range(5000, 20000);
-+ gpiod_set_value_cansleep(ft6236->reset_gpio, 0);
-+ msleep(300);
-+}
-+
-+static int ft6236_probe(struct i2c_client *client,
-+ const struct i2c_device_id *id)
-+{
-+ struct device *dev = &client->dev;
-+ struct ft6236_data *ft6236;
-+ struct input_dev *input;
-+ u32 fuzz_x = 0, fuzz_y = 0;
-+ u8 val;
-+ int error;
-+
-+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
-+ return -ENXIO;
-+
-+ if (!client->irq) {
-+ dev_err(dev, "irq is missing\n");
-+ return -EINVAL;
-+ }
-+
-+ ft6236 = devm_kzalloc(dev, sizeof(*ft6236), GFP_KERNEL);
-+ if (!ft6236)
-+ return -ENOMEM;
-+
-+ ft6236->client = client;
-+ ft6236->reset_gpio = devm_gpiod_get_optional(dev, "reset",
-+ GPIOD_OUT_LOW);
-+ if (IS_ERR(ft6236->reset_gpio)) {
-+ error = PTR_ERR(ft6236->reset_gpio);
-+ if (error != -EPROBE_DEFER)
-+ dev_err(dev, "error getting reset gpio: %d\n", error);
-+ return error;
-+ }
-+
-+ ft6236_reset(ft6236);
-+
-+ /* verify that the controller is present */
-+ error = ft6236_read(client, 0x00, 1, &val);
-+ if (error) {
-+ dev_err(dev, "failed to read from controller: %d\n", error);
-+ return error;
-+ }
-+
-+ ft6236_debug_info(ft6236);
-+
-+ input = devm_input_allocate_device(dev);
-+ if (!input)
-+ return -ENOMEM;
-+
-+ ft6236->input = input;
-+ input->name = client->name;
-+ input->id.bustype = BUS_I2C;
-+
-+ if (device_property_read_u32(dev, "touchscreen-size-x",
-+ &ft6236->max_x) ||
-+ device_property_read_u32(dev, "touchscreen-size-y",
-+ &ft6236->max_y)) {
-+ dev_err(dev, "touchscreen-size-x and/or -y missing\n");
-+ return -EINVAL;
-+ }
-+
-+ device_property_read_u32(dev, "touchscreen-fuzz-x", &fuzz_x);
-+ device_property_read_u32(dev, "touchscreen-fuzz-y", &fuzz_y);
-+ ft6236->invert_x = device_property_read_bool(dev,
-+ "touchscreen-inverted-x");
-+ ft6236->invert_y = device_property_read_bool(dev,
-+ "touchscreen-inverted-y");
-+ ft6236->swap_xy = device_property_read_bool(dev,
-+ "touchscreen-swapped-x-y");
-+
-+ if (ft6236->swap_xy) {
-+ input_set_abs_params(input, ABS_MT_POSITION_X, 0,
-+ ft6236->max_y, fuzz_y, 0);
-+ input_set_abs_params(input, ABS_MT_POSITION_Y, 0,
-+ ft6236->max_x, fuzz_x, 0);
-+ } else {
-+ input_set_abs_params(input, ABS_MT_POSITION_X, 0,
-+ ft6236->max_x, fuzz_x, 0);
-+ input_set_abs_params(input, ABS_MT_POSITION_Y, 0,
-+ ft6236->max_y, fuzz_y, 0);
-+ }
-+
-+ error = input_mt_init_slots(input, FT6236_MAX_TOUCH_POINTS,
-+ INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
-+ if (error)
-+ return error;
-+
-+ error = devm_request_threaded_irq(dev, client->irq, NULL,
-+ ft6236_interrupt, IRQF_ONESHOT,
-+ client->name, ft6236);
-+ if (error) {
-+ dev_err(dev, "request irq %d failed: %d\n", client->irq, error);
-+ return error;
-+ }
-+
-+ error = input_register_device(input);
-+ if (error) {
-+ dev_err(dev, "failed to register input device: %d\n", error);
-+ return error;
-+ }
-+
-+ return 0;
-+}
-+
-+#ifdef CONFIG_OF
-+static const struct of_device_id ft6236_of_match[] = {
-+ { .compatible = "focaltech,ft6236", },
-+ { }
-+};
-+MODULE_DEVICE_TABLE(of, ft6236_of_match);
-+#endif
-+
-+static const struct i2c_device_id ft6236_id[] = {
-+ { "ft6236", },
-+ { }
-+};
-+MODULE_DEVICE_TABLE(i2c, ft6236_id);
-+
-+static struct i2c_driver ft6236_driver = {
-+ .driver = {
-+ .name = "ft6236",
-+ .owner = THIS_MODULE,
-+ .of_match_table = of_match_ptr(ft6236_of_match),
-+ },
-+ .probe = ft6236_probe,
-+ .id_table = ft6236_id,
-+};
-+module_i2c_driver(ft6236_driver);
-+
-+MODULE_AUTHOR("Sean Cross <xobs@kosagi.com>");
-+MODULE_AUTHOR("Noralf Trønnes <noralf@tronnes.org>");
-+MODULE_DESCRIPTION("FocalTech FT6236 TouchScreen driver");
-+MODULE_LICENSE("GPL");
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