@@ -1027,4 +1027,18 @@ config INTEL_TELEMETRY
used to get various SoC events and parameters
directly via debugfs files. Various tools may use
this interface for SoC state monitoring.
+
+config SILEAD_DMI
+ bool "Tablets with Silead touchscreens"
+ depends on ACPI && DMI && I2C && INPUT
+ ---help---
+ Certain ACPI based tablets with Silead touchscreens do not have
+ enough data in ACPI tables for the touchscreen driver to handle
+ the touchscreen properly, as OEMs expected the data to be baked
+ into the tablet model specific version of the driver shipped
+ with the os-image for the device. This option supplied the
+ missing information. Enable it if you have one of the following
+ tablets:
+ - CUBE iwork8 Air
+ - Jumper EZpad mini3
endif # X86_PLATFORM_DEVICES
@@ -71,3 +71,4 @@ obj-$(CONFIG_INTEL_TELEMETRY) += intel_telemetry_core.o \
intel_telemetry_pltdrv.o \
intel_telemetry_debugfs.o
obj-$(CONFIG_INTEL_PMC_CORE) += intel_pmc_core.o
+obj-$(CONFIG_SLIEAD_DMI) += silead_dmi.o
new file mode 100644
@@ -0,0 +1,153 @@
+/*
+ * 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[] __initdata = {
+ 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 __initconst = {
+ .acpi_name = "GSL3670",
+ .properties = cube_iwork8_air_props,
+};
+
+static struct property_entry jumper_ezpad_mini3_props[] __initdata = {
+ 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 __initconst = {
+ .acpi_name = "FIXME",
+ .properties = jumper_ezpad_mini3_props,
+};
+
+static const struct dmi_system_id silead_ts_dmi_table[] __initconst = {
+ {
+ .ident = "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"),
+ },
+ },
+ {
+ .ident = "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 __init 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) {
+ ts_data = dmi_id->driver_data;
+ if (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 __init 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 __initdata = {
+ .notifier_call = silead_ts_dmi_notifier_call,
+};
+
+static bool silead_ts_dmi_registered __initdata;
+
+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;
+ }
+
+ silead_ts_dmi_registered = true;
+ return 0;
+}
+/*
+ * 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 sysbsys initcall level).
+ */
+arch_initcall(silead_ts_dmi_init);
+
+static int __init silead_ts_dmi_exit(void)
+{
+ if (silead_ts_dmi_registered)
+ bus_unregister_notifier(&i2c_bus_type, &silead_ts_dmi_notifier);
+
+ return 0;
+}
+/*
+ * We do not expect touchscreen ACPI devices come and go, so we can unregister
+ * and free memory once we get to late initcalls.
+ */
+late_initcall(silead_ts_dmi_exit);