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path: root/drivers/input/touchscreen/mms114.c
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Diffstat (limited to 'drivers/input/touchscreen/mms114.c')
-rw-r--r--drivers/input/touchscreen/mms114.c141
1 files changed, 115 insertions, 26 deletions
diff --git a/drivers/input/touchscreen/mms114.c b/drivers/input/touchscreen/mms114.c
index 1f96657310b7..9f947044c4d9 100644
--- a/drivers/input/touchscreen/mms114.c
+++ b/drivers/input/touchscreen/mms114.c
@@ -1,5 +1,5 @@
// SPDX-License-Identifier: GPL-2.0
-// Melfas MMS114/MMS152 touchscreen device driver
+// Melfas MMS114/MMS136/MMS152 touchscreen device driver
//
// Copyright (c) 2012 Samsung Electronics Co., Ltd.
// Author: Joonyoung Shim <jy0922.shim@samsung.com>
@@ -7,7 +7,6 @@
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/of.h>
-#include <linux/of_device.h>
#include <linux/i2c.h>
#include <linux/input/mt.h>
#include <linux/input/touchscreen.h>
@@ -43,8 +42,10 @@
/* Touchscreen absolute values */
#define MMS114_MAX_AREA 0xff
+#define MMS114_MAX_TOUCHKEYS 15
#define MMS114_MAX_TOUCH 10
-#define MMS114_PACKET_NUM 8
+#define MMS114_EVENT_SIZE 8
+#define MMS136_EVENT_SIZE 6
/* Touch type */
#define MMS114_TYPE_NONE 0
@@ -53,6 +54,8 @@
enum mms_type {
TYPE_MMS114 = 114,
+ TYPE_MMS134S = 134,
+ TYPE_MMS136 = 136,
TYPE_MMS152 = 152,
TYPE_MMS345L = 345,
};
@@ -67,6 +70,9 @@ struct mms114_data {
unsigned int contact_threshold;
unsigned int moving_threshold;
+ u32 keycodes[MMS114_MAX_TOUCHKEYS];
+ int num_keycodes;
+
/* Use cache data for mode control register(write only) */
u8 cache_mode_control;
};
@@ -164,11 +170,6 @@ static void mms114_process_mt(struct mms114_data *data, struct mms114_touch *tou
return;
}
- if (touch->type != MMS114_TYPE_TOUCHSCREEN) {
- dev_err(&client->dev, "Wrong touch type (%d)\n", touch->type);
- return;
- }
-
id = touch->id - 1;
x = touch->x_lo | touch->x_hi << 8;
y = touch->y_lo | touch->y_hi << 8;
@@ -188,9 +189,33 @@ static void mms114_process_mt(struct mms114_data *data, struct mms114_touch *tou
}
}
+static void mms114_process_touchkey(struct mms114_data *data,
+ struct mms114_touch *touch)
+{
+ struct i2c_client *client = data->client;
+ struct input_dev *input_dev = data->input_dev;
+ unsigned int keycode_id;
+
+ if (touch->id == 0)
+ return;
+
+ if (touch->id > data->num_keycodes) {
+ dev_err(&client->dev, "Wrong touch id for touchkey (%d)\n",
+ touch->id);
+ return;
+ }
+
+ keycode_id = touch->id - 1;
+ dev_dbg(&client->dev, "keycode id: %d, pressed: %d\n", keycode_id,
+ touch->pressed);
+
+ input_report_key(input_dev, data->keycodes[keycode_id], touch->pressed);
+}
+
static irqreturn_t mms114_interrupt(int irq, void *dev_id)
{
struct mms114_data *data = dev_id;
+ struct i2c_client *client = data->client;
struct input_dev *input_dev = data->input_dev;
struct mms114_touch touch[MMS114_MAX_TOUCH];
int packet_size;
@@ -199,7 +224,7 @@ static irqreturn_t mms114_interrupt(int irq, void *dev_id)
int error;
mutex_lock(&input_dev->mutex);
- if (!input_dev->users) {
+ if (!input_device_enabled(input_dev)) {
mutex_unlock(&input_dev->mutex);
goto out;
}
@@ -209,15 +234,33 @@ static irqreturn_t mms114_interrupt(int irq, void *dev_id)
if (packet_size <= 0)
goto out;
- touch_size = packet_size / MMS114_PACKET_NUM;
+ /* MMS136 has slightly different event size */
+ if (data->type == TYPE_MMS134S || data->type == TYPE_MMS136)
+ touch_size = packet_size / MMS136_EVENT_SIZE;
+ else
+ touch_size = packet_size / MMS114_EVENT_SIZE;
error = __mms114_read_reg(data, MMS114_INFORMATION, packet_size,
(u8 *)touch);
if (error < 0)
goto out;
- for (index = 0; index < touch_size; index++)
- mms114_process_mt(data, touch + index);
+ for (index = 0; index < touch_size; index++) {
+ switch (touch[index].type) {
+ case MMS114_TYPE_TOUCHSCREEN:
+ mms114_process_mt(data, touch + index);
+ break;
+
+ case MMS114_TYPE_TOUCHKEY:
+ mms114_process_touchkey(data, touch + index);
+ break;
+
+ default:
+ dev_err(&client->dev, "Wrong touch type (%d)\n",
+ touch[index].type);
+ break;
+ }
+ }
input_mt_report_pointer_emulation(data->input_dev, true);
input_sync(data->input_dev);
@@ -275,6 +318,8 @@ static int mms114_get_version(struct mms114_data *data)
break;
case TYPE_MMS114:
+ case TYPE_MMS134S:
+ case TYPE_MMS136:
error = __mms114_read_reg(data, MMS114_TSP_REV, 6, buf);
if (error)
return error;
@@ -297,8 +342,9 @@ static int mms114_setup_regs(struct mms114_data *data)
if (error < 0)
return error;
- /* Only MMS114 has configuration and power on registers */
- if (data->type != TYPE_MMS114)
+ /* MMS114, MMS134S and MMS136 have configuration and power on registers */
+ if (data->type != TYPE_MMS114 && data->type != TYPE_MMS134S &&
+ data->type != TYPE_MMS136)
return 0;
error = mms114_set_active(data, true);
@@ -430,13 +476,13 @@ static int mms114_parse_legacy_bindings(struct mms114_data *data)
return 0;
}
-static int mms114_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
+static int mms114_probe(struct i2c_client *client)
{
struct mms114_data *data;
struct input_dev *input_dev;
const void *match_data;
int error;
+ int i;
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(&client->dev, "Not supported I2C adapter\n");
@@ -460,6 +506,42 @@ static int mms114_probe(struct i2c_client *client,
data->type = (enum mms_type)match_data;
+ data->num_keycodes = device_property_count_u32(&client->dev,
+ "linux,keycodes");
+ if (data->num_keycodes == -EINVAL) {
+ data->num_keycodes = 0;
+ } else if (data->num_keycodes < 0) {
+ dev_err(&client->dev,
+ "Unable to parse linux,keycodes property: %d\n",
+ data->num_keycodes);
+ return data->num_keycodes;
+ } else if (data->num_keycodes > MMS114_MAX_TOUCHKEYS) {
+ dev_warn(&client->dev,
+ "Found %d linux,keycodes but max is %d, ignoring the rest\n",
+ data->num_keycodes, MMS114_MAX_TOUCHKEYS);
+ data->num_keycodes = MMS114_MAX_TOUCHKEYS;
+ }
+
+ if (data->num_keycodes > 0) {
+ error = device_property_read_u32_array(&client->dev,
+ "linux,keycodes",
+ data->keycodes,
+ data->num_keycodes);
+ if (error) {
+ dev_err(&client->dev,
+ "Unable to read linux,keycodes values: %d\n",
+ error);
+ return error;
+ }
+
+ input_dev->keycode = data->keycodes;
+ input_dev->keycodemax = data->num_keycodes;
+ input_dev->keycodesize = sizeof(data->keycodes[0]);
+ for (i = 0; i < data->num_keycodes; i++)
+ input_set_capability(input_dev,
+ EV_KEY, data->keycodes[i]);
+ }
+
input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_X);
input_set_capability(input_dev, EV_ABS, ABS_MT_POSITION_Y);
input_set_abs_params(input_dev, ABS_MT_PRESSURE, 0, 255, 0, 0);
@@ -480,7 +562,8 @@ static int mms114_probe(struct i2c_client *client,
0, data->props.max_y, 0, 0);
}
- if (data->type == TYPE_MMS114) {
+ if (data->type == TYPE_MMS114 || data->type == TYPE_MMS134S ||
+ data->type == TYPE_MMS136) {
/*
* The firmware handles movement and pressure fuzz, so
* don't duplicate that in software.
@@ -530,13 +613,13 @@ static int mms114_probe(struct i2c_client *client,
}
error = devm_request_threaded_irq(&client->dev, client->irq,
- NULL, mms114_interrupt, IRQF_ONESHOT,
+ NULL, mms114_interrupt,
+ IRQF_ONESHOT | IRQF_NO_AUTOEN,
dev_name(&client->dev), data);
if (error) {
dev_err(&client->dev, "Failed to register interrupt\n");
return error;
}
- disable_irq(client->irq);
error = input_register_device(data->input_dev);
if (error) {
@@ -547,7 +630,7 @@ static int mms114_probe(struct i2c_client *client,
return 0;
}
-static int __maybe_unused mms114_suspend(struct device *dev)
+static int mms114_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct mms114_data *data = i2c_get_clientdata(client);
@@ -564,14 +647,14 @@ static int __maybe_unused mms114_suspend(struct device *dev)
input_sync(input_dev);
mutex_lock(&input_dev->mutex);
- if (input_dev->users)
+ if (input_device_enabled(input_dev))
mms114_stop(data);
mutex_unlock(&input_dev->mutex);
return 0;
}
-static int __maybe_unused mms114_resume(struct device *dev)
+static int mms114_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct mms114_data *data = i2c_get_clientdata(client);
@@ -579,7 +662,7 @@ static int __maybe_unused mms114_resume(struct device *dev)
int error;
mutex_lock(&input_dev->mutex);
- if (input_dev->users) {
+ if (input_device_enabled(input_dev)) {
error = mms114_start(data);
if (error < 0) {
mutex_unlock(&input_dev->mutex);
@@ -591,10 +674,10 @@ static int __maybe_unused mms114_resume(struct device *dev)
return 0;
}
-static SIMPLE_DEV_PM_OPS(mms114_pm_ops, mms114_suspend, mms114_resume);
+static DEFINE_SIMPLE_DEV_PM_OPS(mms114_pm_ops, mms114_suspend, mms114_resume);
static const struct i2c_device_id mms114_id[] = {
- { "mms114", 0 },
+ { "mms114" },
{ }
};
MODULE_DEVICE_TABLE(i2c, mms114_id);
@@ -605,6 +688,12 @@ static const struct of_device_id mms114_dt_match[] = {
.compatible = "melfas,mms114",
.data = (void *)TYPE_MMS114,
}, {
+ .compatible = "melfas,mms134s",
+ .data = (void *)TYPE_MMS134S,
+ }, {
+ .compatible = "melfas,mms136",
+ .data = (void *)TYPE_MMS136,
+ }, {
.compatible = "melfas,mms152",
.data = (void *)TYPE_MMS152,
}, {
@@ -619,7 +708,7 @@ MODULE_DEVICE_TABLE(of, mms114_dt_match);
static struct i2c_driver mms114_driver = {
.driver = {
.name = "mms114",
- .pm = &mms114_pm_ops,
+ .pm = pm_sleep_ptr(&mms114_pm_ops),
.of_match_table = of_match_ptr(mms114_dt_match),
},
.probe = mms114_probe,
generated by cgit (git 2.34.1) at 2025-12-25 23:36:06 +0000