Merge branch 'ili2xxx-touchscreen' into next
Bring in improvements to ili2xxx driver, including support for 2117A/2118A controllers.
This commit is contained in:
Dmitry Torokhov
commit
7ca7cb2382
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@ -1,8 +1,9 @@
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Ilitek ILI210x/ILI251x touchscreen controller
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Ilitek ILI210x/ILI2117/ILI251x touchscreen controller
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Required properties:
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- compatible:
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ilitek,ili210x for ILI210x
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ilitek,ili2117 for ILI2117
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ilitek,ili251x for ILI251x
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- reg: The I2C address of the device
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@ -1,20 +1,22 @@
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// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/module.h>
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#include <linux/delay.h>
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#include <linux/gpio/consumer.h>
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#include <linux/i2c.h>
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#include <linux/interrupt.h>
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#include <linux/slab.h>
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#include <linux/input.h>
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#include <linux/input/mt.h>
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#include <linux/input/touchscreen.h>
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#include <linux/delay.h>
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#include <linux/workqueue.h>
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#include <linux/gpio/consumer.h>
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/of_device.h>
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#include <linux/slab.h>
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#include <asm/unaligned.h>
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#define ILI210X_TOUCHES 2
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#define ILI251X_TOUCHES 10
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#define DEFAULT_POLL_PERIOD 20
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#define ILI2XXX_POLL_PERIOD 20
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#define ILI210X_DATA_SIZE 64
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#define ILI211X_DATA_SIZE 43
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#define ILI251X_DATA_SIZE1 31
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#define ILI251X_DATA_SIZE2 20
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/* Touchscreen commands */
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#define REG_TOUCHDATA 0x10
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@ -28,27 +30,29 @@ struct firmware_version {
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u8 minor;
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} __packed;
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enum ili2xxx_model {
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MODEL_ILI210X,
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MODEL_ILI251X,
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struct ili2xxx_chip {
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int (*read_reg)(struct i2c_client *client, u8 reg,
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void *buf, size_t len);
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int (*get_touch_data)(struct i2c_client *client, u8 *data);
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bool (*parse_touch_data)(const u8 *data, unsigned int finger,
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unsigned int *x, unsigned int *y);
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bool (*continue_polling)(const u8 *data, bool touch);
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unsigned int max_touches;
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};
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struct ili210x {
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struct i2c_client *client;
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struct input_dev *input;
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unsigned int poll_period;
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struct delayed_work dwork;
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struct gpio_desc *reset_gpio;
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struct touchscreen_properties prop;
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enum ili2xxx_model model;
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unsigned int max_touches;
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const struct ili2xxx_chip *chip;
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bool stop;
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};
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static int ili210x_read_reg(struct i2c_client *client, u8 reg, void *buf,
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size_t len)
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static int ili210x_read_reg(struct i2c_client *client,
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u8 reg, void *buf, size_t len)
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{
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struct ili210x *priv = i2c_get_clientdata(client);
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struct i2c_msg msg[2] = {
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struct i2c_msg msg[] = {
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{
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.addr = client->addr,
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.flags = 0,
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@ -62,53 +66,28 @@ static int ili210x_read_reg(struct i2c_client *client, u8 reg, void *buf,
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.buf = buf,
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}
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};
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int error, ret;
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if (priv->model == MODEL_ILI251X) {
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if (i2c_transfer(client->adapter, msg, 1) != 1) {
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dev_err(&client->dev, "i2c transfer failed\n");
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return -EIO;
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}
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usleep_range(5000, 5500);
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if (i2c_transfer(client->adapter, msg + 1, 1) != 1) {
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dev_err(&client->dev, "i2c transfer failed\n");
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return -EIO;
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}
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} else {
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if (i2c_transfer(client->adapter, msg, 2) != 2) {
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dev_err(&client->dev, "i2c transfer failed\n");
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return -EIO;
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}
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ret = i2c_transfer(client->adapter, msg, ARRAY_SIZE(msg));
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if (ret != ARRAY_SIZE(msg)) {
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error = ret < 0 ? ret : -EIO;
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dev_err(&client->dev, "%s failed: %d\n", __func__, error);
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return error;
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}
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return 0;
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}
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static int ili210x_read(struct i2c_client *client, void *buf, size_t len)
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static int ili210x_read_touch_data(struct i2c_client *client, u8 *data)
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{
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struct i2c_msg msg = {
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.addr = client->addr,
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.flags = I2C_M_RD,
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.len = len,
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.buf = buf,
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};
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if (i2c_transfer(client->adapter, &msg, 1) != 1) {
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dev_err(&client->dev, "i2c transfer failed\n");
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return -EIO;
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}
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return 0;
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return ili210x_read_reg(client, REG_TOUCHDATA,
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data, ILI210X_DATA_SIZE);
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}
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static bool ili210x_touchdata_to_coords(struct ili210x *priv, u8 *touchdata,
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static bool ili210x_touchdata_to_coords(const u8 *touchdata,
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unsigned int finger,
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unsigned int *x, unsigned int *y)
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{
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if (finger >= ILI210X_TOUCHES)
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return false;
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if (touchdata[0] & BIT(finger))
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return false;
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@ -118,95 +97,189 @@ static bool ili210x_touchdata_to_coords(struct ili210x *priv, u8 *touchdata,
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return true;
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}
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static bool ili251x_touchdata_to_coords(struct ili210x *priv, u8 *touchdata,
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static bool ili210x_check_continue_polling(const u8 *data, bool touch)
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{
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return data[0] & 0xf3;
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}
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static const struct ili2xxx_chip ili210x_chip = {
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.read_reg = ili210x_read_reg,
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.get_touch_data = ili210x_read_touch_data,
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.parse_touch_data = ili210x_touchdata_to_coords,
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.continue_polling = ili210x_check_continue_polling,
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.max_touches = 2,
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};
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static int ili211x_read_touch_data(struct i2c_client *client, u8 *data)
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{
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s16 sum = 0;
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int error;
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int ret;
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int i;
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ret = i2c_master_recv(client, data, ILI211X_DATA_SIZE);
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if (ret != ILI211X_DATA_SIZE) {
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error = ret < 0 ? ret : -EIO;
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dev_err(&client->dev, "%s failed: %d\n", __func__, error);
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return error;
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}
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/* This chip uses custom checksum at the end of data */
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for (i = 0; i < ILI211X_DATA_SIZE - 1; i++)
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sum = (sum + data[i]) & 0xff;
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if ((-sum & 0xff) != data[ILI211X_DATA_SIZE - 1]) {
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dev_err(&client->dev,
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"CRC error (crc=0x%02x expected=0x%02x)\n",
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sum, data[ILI211X_DATA_SIZE - 1]);
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return -EIO;
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}
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return 0;
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}
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static bool ili211x_touchdata_to_coords(const u8 *touchdata,
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unsigned int finger,
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unsigned int *x, unsigned int *y)
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{
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if (finger >= ILI251X_TOUCHES)
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u32 data;
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data = get_unaligned_be32(touchdata + 1 + (finger * 4) + 0);
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if (data == 0xffffffff) /* Finger up */
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return false;
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*x = get_unaligned_be16(touchdata + 1 + (finger * 5) + 0);
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if (!(*x & BIT(15))) /* Touch indication */
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*x = ((touchdata[1 + (finger * 4) + 0] & 0xf0) << 4) |
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touchdata[1 + (finger * 4) + 1];
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*y = ((touchdata[1 + (finger * 4) + 0] & 0x0f) << 8) |
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touchdata[1 + (finger * 4) + 2];
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return true;
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}
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static bool ili211x_decline_polling(const u8 *data, bool touch)
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{
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return false;
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}
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static const struct ili2xxx_chip ili211x_chip = {
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.read_reg = ili210x_read_reg,
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.get_touch_data = ili211x_read_touch_data,
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.parse_touch_data = ili211x_touchdata_to_coords,
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.continue_polling = ili211x_decline_polling,
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.max_touches = 10,
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};
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static int ili251x_read_reg(struct i2c_client *client,
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u8 reg, void *buf, size_t len)
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{
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int error;
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int ret;
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ret = i2c_master_send(client, ®, 1);
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if (ret == 1) {
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usleep_range(5000, 5500);
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ret = i2c_master_recv(client, buf, len);
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if (ret == len)
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return 0;
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}
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error = ret < 0 ? ret : -EIO;
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dev_err(&client->dev, "%s failed: %d\n", __func__, error);
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return ret;
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}
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static int ili251x_read_touch_data(struct i2c_client *client, u8 *data)
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{
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int error;
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error = ili251x_read_reg(client, REG_TOUCHDATA,
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data, ILI251X_DATA_SIZE1);
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if (!error && data[0] == 2) {
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error = i2c_master_recv(client, data + ILI251X_DATA_SIZE1,
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ILI251X_DATA_SIZE2);
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if (error >= 0 && error != ILI251X_DATA_SIZE2)
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error = -EIO;
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}
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return error;
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}
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static bool ili251x_touchdata_to_coords(const u8 *touchdata,
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unsigned int finger,
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unsigned int *x, unsigned int *y)
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{
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u16 val;
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val = get_unaligned_be16(touchdata + 1 + (finger * 5) + 0);
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if (!(val & BIT(15))) /* Touch indication */
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return false;
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*x &= 0x3fff;
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*x = val & 0x3fff;
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*y = get_unaligned_be16(touchdata + 1 + (finger * 5) + 2);
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return true;
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}
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static bool ili251x_check_continue_polling(const u8 *data, bool touch)
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{
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return touch;
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}
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static const struct ili2xxx_chip ili251x_chip = {
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.read_reg = ili251x_read_reg,
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.get_touch_data = ili251x_read_touch_data,
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.parse_touch_data = ili251x_touchdata_to_coords,
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.continue_polling = ili251x_check_continue_polling,
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.max_touches = 10,
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};
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static bool ili210x_report_events(struct ili210x *priv, u8 *touchdata)
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{
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struct input_dev *input = priv->input;
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int i;
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bool contact = false, touch = false;
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bool contact = false, touch;
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unsigned int x = 0, y = 0;
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for (i = 0; i < priv->max_touches; i++) {
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if (priv->model == MODEL_ILI210X) {
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touch = ili210x_touchdata_to_coords(priv, touchdata,
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i, &x, &y);
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} else if (priv->model == MODEL_ILI251X) {
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touch = ili251x_touchdata_to_coords(priv, touchdata,
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i, &x, &y);
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if (touch)
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contact = true;
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}
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for (i = 0; i < priv->chip->max_touches; i++) {
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touch = priv->chip->parse_touch_data(touchdata, i, &x, &y);
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input_mt_slot(input, i);
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input_mt_report_slot_state(input, MT_TOOL_FINGER, touch);
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if (!touch)
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continue;
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touchscreen_report_pos(input, &priv->prop, x, y,
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true);
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if (input_mt_report_slot_state(input, MT_TOOL_FINGER, touch)) {
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touchscreen_report_pos(input, &priv->prop, x, y, true);
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contact = true;
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}
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}
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input_mt_report_pointer_emulation(input, false);
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input_sync(input);
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if (priv->model == MODEL_ILI210X)
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contact = touchdata[0] & 0xf3;
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return contact;
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}
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static void ili210x_work(struct work_struct *work)
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{
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struct ili210x *priv = container_of(work, struct ili210x,
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dwork.work);
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struct i2c_client *client = priv->client;
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u8 touchdata[64] = { 0 };
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bool touch;
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int error = -EINVAL;
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if (priv->model == MODEL_ILI210X) {
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error = ili210x_read_reg(client, REG_TOUCHDATA,
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touchdata, sizeof(touchdata));
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} else if (priv->model == MODEL_ILI251X) {
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error = ili210x_read_reg(client, REG_TOUCHDATA,
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touchdata, 31);
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if (!error && touchdata[0] == 2)
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error = ili210x_read(client, &touchdata[31], 20);
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}
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if (error) {
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dev_err(&client->dev,
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"Unable to get touchdata, err = %d\n", error);
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return;
|
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}
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touch = ili210x_report_events(priv, touchdata);
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|
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if (touch)
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schedule_delayed_work(&priv->dwork,
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msecs_to_jiffies(priv->poll_period));
|
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}
|
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|
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static irqreturn_t ili210x_irq(int irq, void *irq_data)
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{
|
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struct ili210x *priv = irq_data;
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struct i2c_client *client = priv->client;
|
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const struct ili2xxx_chip *chip = priv->chip;
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u8 touchdata[ILI210X_DATA_SIZE] = { 0 };
|
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bool keep_polling;
|
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bool touch;
|
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int error;
|
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|
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schedule_delayed_work(&priv->dwork, 0);
|
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do {
|
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error = chip->get_touch_data(client, touchdata);
|
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if (error) {
|
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dev_err(&client->dev,
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"Unable to get touch data: %d\n", error);
|
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break;
|
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}
|
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|
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touch = ili210x_report_events(priv, touchdata);
|
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keep_polling = chip->continue_polling(touchdata, touch);
|
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if (keep_polling)
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msleep(ILI2XXX_POLL_PERIOD);
|
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} while (!priv->stop && keep_polling);
|
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|
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return IRQ_HANDLED;
|
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}
|
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|
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@ -253,28 +326,35 @@ static void ili210x_power_down(void *data)
|
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gpiod_set_value_cansleep(reset_gpio, 1);
|
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}
|
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|
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static void ili210x_cancel_work(void *data)
|
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static void ili210x_stop(void *data)
|
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{
|
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struct ili210x *priv = data;
|
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|
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cancel_delayed_work_sync(&priv->dwork);
|
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/* Tell ISR to quit even if there is a contact. */
|
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priv->stop = true;
|
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}
|
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|
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static int ili210x_i2c_probe(struct i2c_client *client,
|
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const struct i2c_device_id *id)
|
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const struct i2c_device_id *id)
|
||||
{
|
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struct device *dev = &client->dev;
|
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const struct ili2xxx_chip *chip;
|
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struct ili210x *priv;
|
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struct gpio_desc *reset_gpio;
|
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struct input_dev *input;
|
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struct firmware_version firmware;
|
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enum ili2xxx_model model;
|
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int error;
|
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|
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model = (enum ili2xxx_model)id->driver_data;
|
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|
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dev_dbg(dev, "Probing for ILI210X I2C Touschreen driver");
|
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|
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chip = device_get_match_data(dev);
|
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if (!chip && id)
|
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chip = (const struct ili2xxx_chip *)id->driver_data;
|
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if (!chip) {
|
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dev_err(&client->dev, "unknown device model\n");
|
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return -ENODEV;
|
||||
}
|
||||
|
||||
if (client->irq <= 0) {
|
||||
dev_err(dev, "No IRQ!\n");
|
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return -EINVAL;
|
||||
|
|
@ -305,20 +385,13 @@ static int ili210x_i2c_probe(struct i2c_client *client,
|
|||
|
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priv->client = client;
|
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priv->input = input;
|
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priv->poll_period = DEFAULT_POLL_PERIOD;
|
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INIT_DELAYED_WORK(&priv->dwork, ili210x_work);
|
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priv->reset_gpio = reset_gpio;
|
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priv->model = model;
|
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if (model == MODEL_ILI210X)
|
||||
priv->max_touches = ILI210X_TOUCHES;
|
||||
if (model == MODEL_ILI251X)
|
||||
priv->max_touches = ILI251X_TOUCHES;
|
||||
|
||||
priv->chip = chip;
|
||||
i2c_set_clientdata(client, priv);
|
||||
|
||||
/* Get firmware version */
|
||||
error = ili210x_read_reg(client, REG_FIRMWARE_VERSION,
|
||||
&firmware, sizeof(firmware));
|
||||
error = chip->read_reg(client, REG_FIRMWARE_VERSION,
|
||||
&firmware, sizeof(firmware));
|
||||
if (error) {
|
||||
dev_err(dev, "Failed to get firmware version, err: %d\n",
|
||||
error);
|
||||
|
|
@ -328,26 +401,31 @@ static int ili210x_i2c_probe(struct i2c_client *client,
|
|||
/* Setup input device */
|
||||
input->name = "ILI210x Touchscreen";
|
||||
input->id.bustype = BUS_I2C;
|
||||
input->dev.parent = dev;
|
||||
|
||||
/* Multi touch */
|
||||
input_set_abs_params(input, ABS_MT_POSITION_X, 0, 0xffff, 0, 0);
|
||||
input_set_abs_params(input, ABS_MT_POSITION_Y, 0, 0xffff, 0, 0);
|
||||
touchscreen_parse_properties(input, true, &priv->prop);
|
||||
input_mt_init_slots(input, priv->max_touches, INPUT_MT_DIRECT);
|
||||
|
||||
error = devm_add_action(dev, ili210x_cancel_work, priv);
|
||||
if (error)
|
||||
error = input_mt_init_slots(input, priv->chip->max_touches,
|
||||
INPUT_MT_DIRECT);
|
||||
if (error) {
|
||||
dev_err(dev, "Unable to set up slots, err: %d\n", error);
|
||||
return error;
|
||||
}
|
||||
|
||||
error = devm_request_irq(dev, client->irq, ili210x_irq, 0,
|
||||
client->name, priv);
|
||||
error = devm_request_threaded_irq(dev, client->irq, NULL, ili210x_irq,
|
||||
IRQF_ONESHOT, client->name, priv);
|
||||
if (error) {
|
||||
dev_err(dev, "Unable to request touchscreen IRQ, err: %d\n",
|
||||
error);
|
||||
return error;
|
||||
}
|
||||
|
||||
error = devm_add_action_or_reset(dev, ili210x_stop, priv);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
error = devm_device_add_group(dev, &ili210x_attr_group);
|
||||
if (error) {
|
||||
dev_err(dev, "Unable to create sysfs attributes, err: %d\n",
|
||||
|
|
@ -361,8 +439,6 @@ static int ili210x_i2c_probe(struct i2c_client *client,
|
|||
return error;
|
||||
}
|
||||
|
||||
device_init_wakeup(dev, 1);
|
||||
|
||||
dev_dbg(dev,
|
||||
"ILI210x initialized (IRQ: %d), firmware version %d.%d.%d",
|
||||
client->irq, firmware.id, firmware.major, firmware.minor);
|
||||
|
|
@ -370,47 +446,25 @@ static int ili210x_i2c_probe(struct i2c_client *client,
|
|||
return 0;
|
||||
}
|
||||
|
||||
static int __maybe_unused ili210x_i2c_suspend(struct device *dev)
|
||||
{
|
||||
struct i2c_client *client = to_i2c_client(dev);
|
||||
|
||||
if (device_may_wakeup(&client->dev))
|
||||
enable_irq_wake(client->irq);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __maybe_unused ili210x_i2c_resume(struct device *dev)
|
||||
{
|
||||
struct i2c_client *client = to_i2c_client(dev);
|
||||
|
||||
if (device_may_wakeup(&client->dev))
|
||||
disable_irq_wake(client->irq);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static SIMPLE_DEV_PM_OPS(ili210x_i2c_pm,
|
||||
ili210x_i2c_suspend, ili210x_i2c_resume);
|
||||
|
||||
static const struct i2c_device_id ili210x_i2c_id[] = {
|
||||
{ "ili210x", MODEL_ILI210X },
|
||||
{ "ili251x", MODEL_ILI251X },
|
||||
{ "ili210x", (long)&ili210x_chip },
|
||||
{ "ili2117", (long)&ili211x_chip },
|
||||
{ "ili251x", (long)&ili251x_chip },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, ili210x_i2c_id);
|
||||
|
||||
static const struct of_device_id ili210x_dt_ids[] = {
|
||||
{ .compatible = "ilitek,ili210x", .data = (void *)MODEL_ILI210X },
|
||||
{ .compatible = "ilitek,ili251x", .data = (void *)MODEL_ILI251X },
|
||||
{ },
|
||||
{ .compatible = "ilitek,ili210x", .data = &ili210x_chip },
|
||||
{ .compatible = "ilitek,ili2117", .data = &ili211x_chip },
|
||||
{ .compatible = "ilitek,ili251x", .data = &ili251x_chip },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, ili210x_dt_ids);
|
||||
|
||||
static struct i2c_driver ili210x_ts_driver = {
|
||||
.driver = {
|
||||
.name = "ili210x_i2c",
|
||||
.pm = &ili210x_i2c_pm,
|
||||
.of_match_table = ili210x_dt_ids,
|
||||
},
|
||||
.id_table = ili210x_i2c_id,
|
||||
|
|
|
|||
Loading…
Reference in New Issue