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authorFurquan Shaikh <furquan@chromium.org>2016-10-21 16:42:45 -0700
committerFurquan Shaikh <furquan@google.com>2016-10-26 22:51:57 +0200
commit16e660560ab4892d8a3add2068b187b633c63361 (patch)
tree244a7966a62e0d04e0cac64bae04f62aa2384d8d
parentf8a4f41d48acc9ecffc9d74185fad0cb8651f4da (diff)
downloadcoreboot-16e660560ab4892d8a3add2068b187b633c63361.tar.xz
drivers/i2c/wacom_ts: Add support for WCOM touchscreen device driver
BUG=chrome-os-partner:57846 Change-Id: Id6bd91b3fd6420994ad5811d362618b1a38a8afa Signed-off-by: Furquan Shaikh <furquan@chromium.org> Reviewed-on: https://review.coreboot.org/17092 Tested-by: build bot (Jenkins) Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net> Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
-rw-r--r--src/drivers/i2c/wacom_ts/Kconfig3
-rw-r--r--src/drivers/i2c/wacom_ts/Makefile.inc1
-rw-r--r--src/drivers/i2c/wacom_ts/chip.h30
-rw-r--r--src/drivers/i2c/wacom_ts/ts.c59
4 files changed, 93 insertions, 0 deletions
diff --git a/src/drivers/i2c/wacom_ts/Kconfig b/src/drivers/i2c/wacom_ts/Kconfig
new file mode 100644
index 0000000000..50da3f14ec
--- /dev/null
+++ b/src/drivers/i2c/wacom_ts/Kconfig
@@ -0,0 +1,3 @@
+config DRIVERS_I2C_WACOM_TS
+ bool
+ select DRIVERS_I2C_GENERIC
diff --git a/src/drivers/i2c/wacom_ts/Makefile.inc b/src/drivers/i2c/wacom_ts/Makefile.inc
new file mode 100644
index 0000000000..94550997f6
--- /dev/null
+++ b/src/drivers/i2c/wacom_ts/Makefile.inc
@@ -0,0 +1 @@
+ramstage-$(CONFIG_DRIVERS_I2C_WACOM_TS) += ts.c
diff --git a/src/drivers/i2c/wacom_ts/chip.h b/src/drivers/i2c/wacom_ts/chip.h
new file mode 100644
index 0000000000..b59f630603
--- /dev/null
+++ b/src/drivers/i2c/wacom_ts/chip.h
@@ -0,0 +1,30 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2016 Google 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; version 2 of the License.
+ *
+ * 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.
+ */
+
+#ifndef __I2C_WACOM_TS_CHIP_H__
+#define __I2C_WACOM_TS_CHIP_H__
+
+#include <drivers/i2c/generic/chip.h>
+
+#define WCOM50C1_HID "WCOM50C1"
+#define PNP0C50_CID "PNP0C50"
+#define WCOM_TS_DESC "WCOM Touchscreen"
+
+struct drivers_i2c_wacom_ts_config {
+ struct drivers_i2c_generic_config generic;
+ uint8_t hid_desc_reg_offset;
+};
+
+#endif /* __I2C_WACOM_TS_CHIP_H__ */
diff --git a/src/drivers/i2c/wacom_ts/ts.c b/src/drivers/i2c/wacom_ts/ts.c
new file mode 100644
index 0000000000..ebc888361b
--- /dev/null
+++ b/src/drivers/i2c/wacom_ts/ts.c
@@ -0,0 +1,59 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2016 Google 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; version 2 of the License.
+ *
+ * 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 <arch/acpigen_dsm.h>
+#include <device/device.h>
+#include <stdint.h>
+#include "chip.h"
+
+static void i2c_wacom_ts_fill_dsm(struct device *dev)
+{
+ struct drivers_i2c_wacom_ts_config *config = dev->chip_info;
+ struct dsm_i2c_hid_config dsm_config = {
+ .hid_desc_reg_offset = config->hid_desc_reg_offset,
+ };
+
+ acpigen_write_dsm_i2c_hid(&dsm_config);
+}
+
+static void i2c_wacom_ts_fill_ssdt_generator(struct device *dev)
+{
+ i2c_generic_fill_ssdt(dev, &i2c_wacom_ts_fill_dsm);
+}
+
+static const char *i2c_wacom_ts_acpi_name(struct device *dev)
+{
+ return "WCTS";
+}
+
+static struct device_operations i2c_wacom_ts_ops = {
+ .read_resources = DEVICE_NOOP,
+ .set_resources = DEVICE_NOOP,
+ .enable_resources = DEVICE_NOOP,
+#if IS_ENABLED(CONFIG_HAVE_ACPI_TABLES)
+ .acpi_name = &i2c_wacom_ts_acpi_name,
+ .acpi_fill_ssdt_generator = &i2c_wacom_ts_fill_ssdt_generator,
+#endif
+};
+
+static void i2c_wacom_ts_enable(struct device *dev)
+{
+ dev->ops = &i2c_wacom_ts_ops;
+}
+
+struct chip_operations drivers_i2c_wacom_ts_ops = {
+ CHIP_NAME("Wacom Touchscreen Device")
+ .enable_dev = &i2c_wacom_ts_enable
+};