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/*
* Silead touchscreen driver DMI based configuration code
*
* Copyright (c) 2017 Red Hat Inc.
*
* 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; either version 2 of the License, or
* (at your option) any later version.
*
* Red Hat authors:
* Hans de Goede <hdegoede@redhat.com>
*/
#include <linux/acpi.h>
#include <linux/device.h>
#include <linux/dmi.h>
#include <linux/i2c.h>
#include <linux/notifier.h>
#include <linux/property.h>
#include <linux/string.h>
struct silead_ts_dmi_data {
const char *acpi_name;
struct property_entry *properties;
};
static struct property_entry cube_iwork8_air_props[] = {
PROPERTY_ENTRY_U32("touchscreen-size-x", 1660),
PROPERTY_ENTRY_U32("touchscreen-size-y", 900),
PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
PROPERTY_ENTRY_STRING("firmware-name", "gsl3670-cube-iwork8-air.fw"),
PROPERTY_ENTRY_U32("silead,max-fingers", 10),
{ }
};
static const struct silead_ts_dmi_data cube_iwork8_air_data = {
.acpi_name = "MSSL1680:00",
.properties = cube_iwork8_air_props,
};
static struct property_entry jumper_ezpad_mini3_props[] = {
PROPERTY_ENTRY_U32("touchscreen-size-x", 1700),
PROPERTY_ENTRY_U32("touchscreen-size-y", 1150),
PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
PROPERTY_ENTRY_STRING("firmware-name", "gsl3676-jumper-ezpad-mini3.fw"),
PROPERTY_ENTRY_U32("silead,max-fingers", 10),
{ }
};
static const struct silead_ts_dmi_data jumper_ezpad_mini3_data = {
.acpi_name = "MSSL1680:00",
.properties = jumper_ezpad_mini3_props,
};
static const struct dmi_system_id silead_ts_dmi_table[] = {
{
/* CUBE iwork8 Air */
.driver_data = (void *)&cube_iwork8_air_data,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "cube"),
DMI_MATCH(DMI_PRODUCT_NAME, "i1-TF"),
DMI_MATCH(DMI_BOARD_NAME, "Cherry Trail CR"),
},
},
{
/* Jumper EZpad mini3 */
.driver_data = (void *)&jumper_ezpad_mini3_data,
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
/* jumperx.T87.KFBNEEA02 with the version-nr dropped */
DMI_MATCH(DMI_BIOS_VERSION, "jumperx.T87.KFBNEEA"),
},
},
{ },
};
static void silead_ts_dmi_add_props(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
const struct dmi_system_id *dmi_id;
const struct silead_ts_dmi_data *ts_data;
int error;
dmi_id = dmi_first_match(silead_ts_dmi_table);
if (!dmi_id)
return;
ts_data = dmi_id->driver_data;
if (has_acpi_companion(dev) &&
!strncmp(ts_data->acpi_name, client->name, I2C_NAME_SIZE)) {
error = device_add_properties(dev, ts_data->properties);
if (error)
dev_err(dev, "failed to add properties: %d\n", error);
}
}
static int silead_ts_dmi_notifier_call(struct notifier_block *nb,
unsigned long action, void *data)
{
struct device *dev = data;
switch (action) {
case BUS_NOTIFY_ADD_DEVICE:
silead_ts_dmi_add_props(dev);
break;
default:
break;
}
return 0;
}
static struct notifier_block silead_ts_dmi_notifier = {
.notifier_call = silead_ts_dmi_notifier_call,
};
static int __init silead_ts_dmi_init(void)
{
int error;
error = bus_register_notifier(&i2c_bus_type, &silead_ts_dmi_notifier);
if (error)
pr_err("%s: failed to register i2c bus notifier: %d\n",
__func__, error);
return error;
}
/*
* We are registering out notifier after i2c core is initialized and i2c bus
* itself is ready (which happens at postcore initcall level), but before
* ACPI starts enumerating devices (at subsys initcall level).
*/
arch_initcall(silead_ts_dmi_init);
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