Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 788 insertions, 0 deletions

diff --git a/drivers/hid/hid-rmi.c b/drivers/hid/hid-rmi.c
new file mode 100644
index 000000000..84e7ba531
--- /dev/null
+++ b/drivers/hid/hid-rmi.c
@@ -0,0 +1,788 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (c) 2013 Andrew Duggan <aduggan@synaptics.com>
+ *  Copyright (c) 2013 Synaptics Incorporated
+ *  Copyright (c) 2014 Benjamin Tissoires <benjamin.tissoires@gmail.com>
+ *  Copyright (c) 2014 Red Hat, Inc
+ */
+
+#include <linux/kernel.h>
+#include <linux/hid.h>
+#include <linux/input.h>
+#include <linux/input/mt.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/module.h>
+#include <linux/pm.h>
+#include <linux/slab.h>
+#include <linux/wait.h>
+#include <linux/sched.h>
+#include <linux/rmi.h>
+#include "hid-ids.h"
+
+#define RMI_MOUSE_REPORT_ID		0x01 /* Mouse emulation Report */
+#define RMI_WRITE_REPORT_ID		0x09 /* Output Report */
+#define RMI_READ_ADDR_REPORT_ID		0x0a /* Output Report */
+#define RMI_READ_DATA_REPORT_ID		0x0b /* Input Report */
+#define RMI_ATTN_REPORT_ID		0x0c /* Input Report */
+#define RMI_SET_RMI_MODE_REPORT_ID	0x0f /* Feature Report */
+
+/* flags */
+#define RMI_READ_REQUEST_PENDING	0
+#define RMI_READ_DATA_PENDING		1
+#define RMI_STARTED			2
+
+/* device flags */
+#define RMI_DEVICE			BIT(0)
+#define RMI_DEVICE_HAS_PHYS_BUTTONS	BIT(1)
+#define RMI_DEVICE_OUTPUT_SET_REPORT	BIT(2)
+
+/*
+ * retrieve the ctrl registers
+ * the ctrl register has a size of 20 but a fw bug split it into 16 + 4,
+ * and there is no way to know if the first 20 bytes are here or not.
+ * We use only the first 12 bytes, so get only them.
+ */
+#define RMI_F11_CTRL_REG_COUNT		12
+
+enum rmi_mode_type {
+	RMI_MODE_OFF			= 0,
+	RMI_MODE_ATTN_REPORTS		= 1,
+	RMI_MODE_NO_PACKED_ATTN_REPORTS	= 2,
+};
+
+/**
+ * struct rmi_data - stores information for hid communication
+ *
+ * @page_mutex: Locks current page to avoid changing pages in unexpected ways.
+ * @page: Keeps track of the current virtual page
+ * @xport: transport device to be registered with the RMI4 core.
+ *
+ * @wait: Used for waiting for read data
+ *
+ * @writeReport: output buffer when writing RMI registers
+ * @readReport: input buffer when reading RMI registers
+ *
+ * @input_report_size: size of an input report (advertised by HID)
+ * @output_report_size: size of an output report (advertised by HID)
+ *
+ * @flags: flags for the current device (started, reading, etc...)
+ *
+ * @reset_work: worker which will be called in case of a mouse report
+ * @hdev: pointer to the struct hid_device
+ *
+ * @device_flags: flags which describe the device
+ *
+ * @domain: the IRQ domain allocated for this RMI4 device
+ * @rmi_irq: the irq that will be used to generate events to rmi-core
+ */
+struct rmi_data {
+	struct mutex page_mutex;
+	int page;
+	struct rmi_transport_dev xport;
+
+	wait_queue_head_t wait;
+
+	u8 *writeReport;
+	u8 *readReport;
+
+	u32 input_report_size;
+	u32 output_report_size;
+
+	unsigned long flags;
+
+	struct work_struct reset_work;
+	struct hid_device *hdev;
+
+	unsigned long device_flags;
+
+	struct irq_domain *domain;
+	int rmi_irq;
+};
+
+#define RMI_PAGE(addr) (((addr) >> 8) & 0xff)
+
+static int rmi_write_report(struct hid_device *hdev, u8 *report, int len);
+
+/**
+ * rmi_set_page - Set RMI page
+ * @hdev: The pointer to the hid_device struct
+ * @page: The new page address.
+ *
+ * RMI devices have 16-bit addressing, but some of the physical
+ * implementations (like SMBus) only have 8-bit addressing. So RMI implements
+ * a page address at 0xff of every page so we can reliable page addresses
+ * every 256 registers.
+ *
+ * The page_mutex lock must be held when this function is entered.
+ *
+ * Returns zero on success, non-zero on failure.
+ */
+static int rmi_set_page(struct hid_device *hdev, u8 page)
+{
+	struct rmi_data *data = hid_get_drvdata(hdev);
+	int retval;
+
+	data->writeReport[0] = RMI_WRITE_REPORT_ID;
+	data->writeReport[1] = 1;
+	data->writeReport[2] = 0xFF;
+	data->writeReport[4] = page;
+
+	retval = rmi_write_report(hdev, data->writeReport,
+			data->output_report_size);
+	if (retval != data->output_report_size) {
+		dev_err(&hdev->dev,
+			"%s: set page failed: %d.", __func__, retval);
+		return retval;
+	}
+
+	data->page = page;
+	return 0;
+}
+
+static int rmi_set_mode(struct hid_device *hdev, u8 mode)
+{
+	int ret;
+	const u8 txbuf[2] = {RMI_SET_RMI_MODE_REPORT_ID, mode};
+	u8 *buf;
+
+	buf = kmemdup(txbuf, sizeof(txbuf), GFP_KERNEL);
+	if (!buf)
+		return -ENOMEM;
+
+	ret = hid_hw_raw_request(hdev, RMI_SET_RMI_MODE_REPORT_ID, buf,
+			sizeof(txbuf), HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
+	kfree(buf);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "unable to set rmi mode to %d (%d)\n", mode,
+			ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int rmi_write_report(struct hid_device *hdev, u8 *report, int len)
+{
+	struct rmi_data *data = hid_get_drvdata(hdev);
+	int ret;
+
+	if (data->device_flags & RMI_DEVICE_OUTPUT_SET_REPORT) {
+		/*
+		 * Talk to device by using SET_REPORT requests instead.
+		 */
+		ret = hid_hw_raw_request(hdev, report[0], report,
+				len, HID_OUTPUT_REPORT, HID_REQ_SET_REPORT);
+	} else {
+		ret = hid_hw_output_report(hdev, (void *)report, len);
+	}
+
+	if (ret < 0) {
+		dev_err(&hdev->dev, "failed to write hid report (%d)\n", ret);
+		return ret;
+	}
+
+	return ret;
+}
+
+static int rmi_hid_read_block(struct rmi_transport_dev *xport, u16 addr,
+		void *buf, size_t len)
+{
+	struct rmi_data *data = container_of(xport, struct rmi_data, xport);
+	struct hid_device *hdev = data->hdev;
+	int ret;
+	int bytes_read;
+	int bytes_needed;
+	int retries;
+	int read_input_count;
+
+	mutex_lock(&data->page_mutex);
+
+	if (RMI_PAGE(addr) != data->page) {
+		ret = rmi_set_page(hdev, RMI_PAGE(addr));
+		if (ret < 0)
+			goto exit;
+	}
+
+	for (retries = 5; retries > 0; retries--) {
+		data->writeReport[0] = RMI_READ_ADDR_REPORT_ID;
+		data->writeReport[1] = 0; /* old 1 byte read count */
+		data->writeReport[2] = addr & 0xFF;
+		data->writeReport[3] = (addr >> 8) & 0xFF;
+		data->writeReport[4] = len  & 0xFF;
+		data->writeReport[5] = (len >> 8) & 0xFF;
+
+		set_bit(RMI_READ_REQUEST_PENDING, &data->flags);
+
+		ret = rmi_write_report(hdev, data->writeReport,
+						data->output_report_size);
+		if (ret != data->output_report_size) {
+			dev_err(&hdev->dev,
+				"failed to write request output report (%d)\n",
+				ret);
+			goto exit;
+		}
+
+		bytes_read = 0;
+		bytes_needed = len;
+		while (bytes_read < len) {
+			if (!wait_event_timeout(data->wait,
+				test_bit(RMI_READ_DATA_PENDING, &data->flags),
+					msecs_to_jiffies(1000))) {
+				hid_warn(hdev, "%s: timeout elapsed\n",
+					 __func__);
+				ret = -EAGAIN;
+				break;
+			}
+
+			read_input_count = data->readReport[1];
+			memcpy(buf + bytes_read, &data->readReport[2],
+				min(read_input_count, bytes_needed));
+
+			bytes_read += read_input_count;
+			bytes_needed -= read_input_count;
+			clear_bit(RMI_READ_DATA_PENDING, &data->flags);
+		}
+
+		if (ret >= 0) {
+			ret = 0;
+			break;
+		}
+	}
+
+exit:
+	clear_bit(RMI_READ_REQUEST_PENDING, &data->flags);
+	mutex_unlock(&data->page_mutex);
+	return ret;
+}
+
+static int rmi_hid_write_block(struct rmi_transport_dev *xport, u16 addr,
+		const void *buf, size_t len)
+{
+	struct rmi_data *data = container_of(xport, struct rmi_data, xport);
+	struct hid_device *hdev = data->hdev;
+	int ret;
+
+	mutex_lock(&data->page_mutex);
+
+	if (RMI_PAGE(addr) != data->page) {
+		ret = rmi_set_page(hdev, RMI_PAGE(addr));
+		if (ret < 0)
+			goto exit;
+	}
+
+	data->writeReport[0] = RMI_WRITE_REPORT_ID;
+	data->writeReport[1] = len;
+	data->writeReport[2] = addr & 0xFF;
+	data->writeReport[3] = (addr >> 8) & 0xFF;
+	memcpy(&data->writeReport[4], buf, len);
+
+	ret = rmi_write_report(hdev, data->writeReport,
+					data->output_report_size);
+	if (ret < 0) {
+		dev_err(&hdev->dev,
+			"failed to write request output report (%d)\n",
+			ret);
+		goto exit;
+	}
+	ret = 0;
+
+exit:
+	mutex_unlock(&data->page_mutex);
+	return ret;
+}
+
+static int rmi_reset_attn_mode(struct hid_device *hdev)
+{
+	struct rmi_data *data = hid_get_drvdata(hdev);
+	struct rmi_device *rmi_dev = data->xport.rmi_dev;
+	int ret;
+
+	ret = rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS);
+	if (ret)
+		return ret;
+
+	if (test_bit(RMI_STARTED, &data->flags))
+		ret = rmi_dev->driver->reset_handler(rmi_dev);
+
+	return ret;
+}
+
+static void rmi_reset_work(struct work_struct *work)
+{
+	struct rmi_data *hdata = container_of(work, struct rmi_data,
+						reset_work);
+
+	/* switch the device to RMI if we receive a generic mouse report */
+	rmi_reset_attn_mode(hdata->hdev);
+}
+
+static int rmi_input_event(struct hid_device *hdev, u8 *data, int size)
+{
+	struct rmi_data *hdata = hid_get_drvdata(hdev);
+	struct rmi_device *rmi_dev = hdata->xport.rmi_dev;
+	unsigned long flags;
+
+	if (!(test_bit(RMI_STARTED, &hdata->flags)))
+		return 0;
+
+	pm_wakeup_event(hdev->dev.parent, 0);
+
+	local_irq_save(flags);
+
+	rmi_set_attn_data(rmi_dev, data[1], &data[2], size - 2);
+
+	generic_handle_irq(hdata->rmi_irq);
+
+	local_irq_restore(flags);
+
+	return 1;
+}
+
+static int rmi_read_data_event(struct hid_device *hdev, u8 *data, int size)
+{
+	struct rmi_data *hdata = hid_get_drvdata(hdev);
+
+	if (!test_bit(RMI_READ_REQUEST_PENDING, &hdata->flags)) {
+		hid_dbg(hdev, "no read request pending\n");
+		return 0;
+	}
+
+	memcpy(hdata->readReport, data, min((u32)size, hdata->input_report_size));
+	set_bit(RMI_READ_DATA_PENDING, &hdata->flags);
+	wake_up(&hdata->wait);
+
+	return 1;
+}
+
+static int rmi_check_sanity(struct hid_device *hdev, u8 *data, int size)
+{
+	int valid_size = size;
+	/*
+	 * On the Dell XPS 13 9333, the bus sometimes get confused and fills
+	 * the report with a sentinel value "ff". Synaptics told us that such
+	 * behavior does not comes from the touchpad itself, so we filter out
+	 * such reports here.
+	 */
+
+	while ((data[valid_size - 1] == 0xff) && valid_size > 0)
+		valid_size--;
+
+	return valid_size;
+}
+
+static int rmi_raw_event(struct hid_device *hdev,
+		struct hid_report *report, u8 *data, int size)
+{
+	struct rmi_data *hdata = hid_get_drvdata(hdev);
+
+	if (!(hdata->device_flags & RMI_DEVICE))
+		return 0;
+
+	size = rmi_check_sanity(hdev, data, size);
+	if (size < 2)
+		return 0;
+
+	switch (data[0]) {
+	case RMI_READ_DATA_REPORT_ID:
+		return rmi_read_data_event(hdev, data, size);
+	case RMI_ATTN_REPORT_ID:
+		return rmi_input_event(hdev, data, size);
+	default:
+		return 1;
+	}
+
+	return 0;
+}
+
+static int rmi_event(struct hid_device *hdev, struct hid_field *field,
+			struct hid_usage *usage, __s32 value)
+{
+	struct rmi_data *data = hid_get_drvdata(hdev);
+
+	if ((data->device_flags & RMI_DEVICE) &&
+	    (field->application == HID_GD_POINTER ||
+	    field->application == HID_GD_MOUSE)) {
+		if (data->device_flags & RMI_DEVICE_HAS_PHYS_BUTTONS) {
+			if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)
+				return 0;
+
+			if ((usage->hid == HID_GD_X || usage->hid == HID_GD_Y)
+			    && !value)
+				return 1;
+		}
+
+		schedule_work(&data->reset_work);
+		return 1;
+	}
+
+	return 0;
+}
+
+static void rmi_report(struct hid_device *hid, struct hid_report *report)
+{
+	struct hid_field *field = report->field[0];
+
+	if (!(hid->claimed & HID_CLAIMED_INPUT))
+		return;
+
+	switch (report->id) {
+	case RMI_READ_DATA_REPORT_ID:
+	case RMI_ATTN_REPORT_ID:
+		return;
+	}
+
+	if (field && field->hidinput && field->hidinput->input)
+		input_sync(field->hidinput->input);
+}
+
+#ifdef CONFIG_PM
+static int rmi_suspend(struct hid_device *hdev, pm_message_t message)
+{
+	struct rmi_data *data = hid_get_drvdata(hdev);
+	struct rmi_device *rmi_dev = data->xport.rmi_dev;
+	int ret;
+
+	if (!(data->device_flags & RMI_DEVICE))
+		return 0;
+
+	ret = rmi_driver_suspend(rmi_dev, false);
+	if (ret) {
+		hid_warn(hdev, "Failed to suspend device: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int rmi_post_resume(struct hid_device *hdev)
+{
+	struct rmi_data *data = hid_get_drvdata(hdev);
+	struct rmi_device *rmi_dev = data->xport.rmi_dev;
+	int ret;
+
+	if (!(data->device_flags & RMI_DEVICE))
+		return 0;
+
+	/* Make sure the HID device is ready to receive events */
+	ret = hid_hw_open(hdev);
+	if (ret)
+		return ret;
+
+	ret = rmi_reset_attn_mode(hdev);
+	if (ret)
+		goto out;
+
+	ret = rmi_driver_resume(rmi_dev, false);
+	if (ret) {
+		hid_warn(hdev, "Failed to resume device: %d\n", ret);
+		goto out;
+	}
+
+out:
+	hid_hw_close(hdev);
+	return ret;
+}
+#endif /* CONFIG_PM */
+
+static int rmi_hid_reset(struct rmi_transport_dev *xport, u16 reset_addr)
+{
+	struct rmi_data *data = container_of(xport, struct rmi_data, xport);
+	struct hid_device *hdev = data->hdev;
+
+	return rmi_reset_attn_mode(hdev);
+}
+
+static int rmi_input_configured(struct hid_device *hdev, struct hid_input *hi)
+{
+	struct rmi_data *data = hid_get_drvdata(hdev);
+	struct input_dev *input = hi->input;
+	int ret = 0;
+
+	if (!(data->device_flags & RMI_DEVICE))
+		return 0;
+
+	data->xport.input = input;
+
+	hid_dbg(hdev, "Opening low level driver\n");
+	ret = hid_hw_open(hdev);
+	if (ret)
+		return ret;
+
+	/* Allow incoming hid reports */
+	hid_device_io_start(hdev);
+
+	ret = rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "failed to set rmi mode\n");
+		goto exit;
+	}
+
+	ret = rmi_set_page(hdev, 0);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "failed to set page select to 0.\n");
+		goto exit;
+	}
+
+	ret = rmi_register_transport_device(&data->xport);
+	if (ret < 0) {
+		dev_err(&hdev->dev, "failed to register transport driver\n");
+		goto exit;
+	}
+
+	set_bit(RMI_STARTED, &data->flags);
+
+exit:
+	hid_device_io_stop(hdev);
+	hid_hw_close(hdev);
+	return ret;
+}
+
+static int rmi_input_mapping(struct hid_device *hdev,
+		struct hid_input *hi, struct hid_field *field,
+		struct hid_usage *usage, unsigned long **bit, int *max)
+{
+	struct rmi_data *data = hid_get_drvdata(hdev);
+
+	/*
+	 * we want to make HID ignore the advertised HID collection
+	 * for RMI deivces
+	 */
+	if (data->device_flags & RMI_DEVICE) {
+		if ((data->device_flags & RMI_DEVICE_HAS_PHYS_BUTTONS) &&
+		    ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON))
+			return 0;
+
+		return -1;
+	}
+
+	return 0;
+}
+
+static int rmi_check_valid_report_id(struct hid_device *hdev, unsigned type,
+		unsigned id, struct hid_report **report)
+{
+	int i;
+
+	*report = hdev->report_enum[type].report_id_hash[id];
+	if (*report) {
+		for (i = 0; i < (*report)->maxfield; i++) {
+			unsigned app = (*report)->field[i]->application;
+			if ((app & HID_USAGE_PAGE) >= HID_UP_MSVENDOR)
+				return 1;
+		}
+	}
+
+	return 0;
+}
+
+static struct rmi_device_platform_data rmi_hid_pdata = {
+	.sensor_pdata = {
+		.sensor_type = rmi_sensor_touchpad,
+		.axis_align.flip_y = true,
+		.dribble = RMI_REG_STATE_ON,
+		.palm_detect = RMI_REG_STATE_OFF,
+	},
+};
+
+static const struct rmi_transport_ops hid_rmi_ops = {
+	.write_block	= rmi_hid_write_block,
+	.read_block	= rmi_hid_read_block,
+	.reset		= rmi_hid_reset,
+};
+
+static void rmi_irq_teardown(void *data)
+{
+	struct rmi_data *hdata = data;
+	struct irq_domain *domain = hdata->domain;
+
+	if (!domain)
+		return;
+
+	irq_dispose_mapping(irq_find_mapping(domain, 0));
+
+	irq_domain_remove(domain);
+	hdata->domain = NULL;
+	hdata->rmi_irq = 0;
+}
+
+static int rmi_irq_map(struct irq_domain *h, unsigned int virq,
+		       irq_hw_number_t hw_irq_num)
+{
+	irq_set_chip_and_handler(virq, &dummy_irq_chip, handle_simple_irq);
+
+	return 0;
+}
+
+static const struct irq_domain_ops rmi_irq_ops = {
+	.map = rmi_irq_map,
+};
+
+static int rmi_setup_irq_domain(struct hid_device *hdev)
+{
+	struct rmi_data *hdata = hid_get_drvdata(hdev);
+	int ret;
+
+	hdata->domain = irq_domain_create_linear(hdev->dev.fwnode, 1,
+						 &rmi_irq_ops, hdata);
+	if (!hdata->domain)
+		return -ENOMEM;
+
+	ret = devm_add_action_or_reset(&hdev->dev, &rmi_irq_teardown, hdata);
+	if (ret)
+		return ret;
+
+	hdata->rmi_irq = irq_create_mapping(hdata->domain, 0);
+	if (hdata->rmi_irq <= 0) {
+		hid_err(hdev, "Can't allocate an IRQ\n");
+		return hdata->rmi_irq < 0 ? hdata->rmi_irq : -ENXIO;
+	}
+
+	return 0;
+}
+
+static int rmi_probe(struct hid_device *hdev, const struct hid_device_id *id)
+{
+	struct rmi_data *data = NULL;
+	int ret;
+	size_t alloc_size;
+	struct hid_report *input_report;
+	struct hid_report *output_report;
+	struct hid_report *feature_report;
+
+	data = devm_kzalloc(&hdev->dev, sizeof(struct rmi_data), GFP_KERNEL);
+	if (!data)
+		return -ENOMEM;
+
+	INIT_WORK(&data->reset_work, rmi_reset_work);
+	data->hdev = hdev;
+
+	hid_set_drvdata(hdev, data);
+
+	hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
+	hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC;
+
+	ret = hid_parse(hdev);
+	if (ret) {
+		hid_err(hdev, "parse failed\n");
+		return ret;
+	}
+
+	if (id->driver_data)
+		data->device_flags = id->driver_data;
+
+	/*
+	 * Check for the RMI specific report ids. If they are misisng
+	 * simply return and let the events be processed by hid-input
+	 */
+	if (!rmi_check_valid_report_id(hdev, HID_FEATURE_REPORT,
+	    RMI_SET_RMI_MODE_REPORT_ID, &feature_report)) {
+		hid_dbg(hdev, "device does not have set mode feature report\n");
+		goto start;
+	}
+
+	if (!rmi_check_valid_report_id(hdev, HID_INPUT_REPORT,
+	    RMI_ATTN_REPORT_ID, &input_report)) {
+		hid_dbg(hdev, "device does not have attention input report\n");
+		goto start;
+	}
+
+	data->input_report_size = hid_report_len(input_report);
+
+	if (!rmi_check_valid_report_id(hdev, HID_OUTPUT_REPORT,
+	    RMI_WRITE_REPORT_ID, &output_report)) {
+		hid_dbg(hdev,
+			"device does not have rmi write output report\n");
+		goto start;
+	}
+
+	data->output_report_size = hid_report_len(output_report);
+
+	data->device_flags |= RMI_DEVICE;
+	alloc_size = data->output_report_size + data->input_report_size;
+
+	data->writeReport = devm_kzalloc(&hdev->dev, alloc_size, GFP_KERNEL);
+	if (!data->writeReport) {
+		hid_err(hdev, "failed to allocate buffer for HID reports\n");
+		return -ENOMEM;
+	}
+
+	data->readReport = data->writeReport + data->output_report_size;
+
+	init_waitqueue_head(&data->wait);
+
+	mutex_init(&data->page_mutex);
+
+	ret = rmi_setup_irq_domain(hdev);
+	if (ret) {
+		hid_err(hdev, "failed to allocate IRQ domain\n");
+		return ret;
+	}
+
+	if (data->device_flags & RMI_DEVICE_HAS_PHYS_BUTTONS)
+		rmi_hid_pdata.gpio_data.disable = true;
+
+	data->xport.dev = hdev->dev.parent;
+	data->xport.pdata = rmi_hid_pdata;
+	data->xport.pdata.irq = data->rmi_irq;
+	data->xport.proto_name = "hid";
+	data->xport.ops = &hid_rmi_ops;
+
+start:
+	ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
+	if (ret) {
+		hid_err(hdev, "hw start failed\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+static void rmi_remove(struct hid_device *hdev)
+{
+	struct rmi_data *hdata = hid_get_drvdata(hdev);
+
+	if ((hdata->device_flags & RMI_DEVICE)
+	    && test_bit(RMI_STARTED, &hdata->flags)) {
+		clear_bit(RMI_STARTED, &hdata->flags);
+		cancel_work_sync(&hdata->reset_work);
+		rmi_unregister_transport_device(&hdata->xport);
+	}
+
+	hid_hw_stop(hdev);
+}
+
+static const struct hid_device_id rmi_id[] = {
+	{ HID_USB_DEVICE(USB_VENDOR_ID_RAZER, USB_DEVICE_ID_RAZER_BLADE_14),
+		.driver_data = RMI_DEVICE_HAS_PHYS_BUTTONS },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_X1_COVER) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_PRIMAX, USB_DEVICE_ID_PRIMAX_REZEL) },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_ACER_SWITCH5),
+		.driver_data = RMI_DEVICE_OUTPUT_SET_REPORT },
+	{ HID_DEVICE(HID_BUS_ANY, HID_GROUP_RMI, HID_ANY_ID, HID_ANY_ID) },
+	{ }
+};
+MODULE_DEVICE_TABLE(hid, rmi_id);
+
+static struct hid_driver rmi_driver = {
+	.name = "hid-rmi",
+	.id_table		= rmi_id,
+	.probe			= rmi_probe,
+	.remove			= rmi_remove,
+	.event			= rmi_event,
+	.raw_event		= rmi_raw_event,
+	.report			= rmi_report,
+	.input_mapping		= rmi_input_mapping,
+	.input_configured	= rmi_input_configured,
+#ifdef CONFIG_PM
+	.suspend		= rmi_suspend,
+	.resume			= rmi_post_resume,
+	.reset_resume		= rmi_post_resume,
+#endif
+};
+
+module_hid_driver(rmi_driver);
+
+MODULE_AUTHOR("Andrew Duggan <aduggan@synaptics.com>");
+MODULE_DESCRIPTION("RMI HID driver");
+MODULE_LICENSE("GPL");