--- /dev/null
+/*
+ * USB Synaptics device driver
+ *
+ * Copyright (c) 2002 Rob Miller (rob@inpharmatica . co . uk)
+ * Copyright (c) 2003 Ron Lee (ron@debian.org)
+ * cPad driver for kernel 2.4
+ *
+ * Copyright (c) 2004 Jan Steinhoff (cpad@jan-steinhoff . de)
+ * Copyright (c) 2004 Ron Lee (ron@debian.org)
+ * rewritten for kernel 2.6
+ *
+ * cPad display character device part is not included. It can be found at
+ * http://jan-steinhoff.de/linux/synaptics-usb.html
+ *
+ * Bases on: usb_skeleton.c v2.2 by Greg Kroah-Hartman
+ * drivers/hid/usbhid/usbmouse.c by Vojtech Pavlik
+ * drivers/input/mouse/synaptics.c by Peter Osterlund
+ *
+ * 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.
+ *
+ * Trademarks are the property of their respective owners.
+ */
+
+/*
+ * There are three different types of Synaptics USB devices: Touchpads,
+ * touchsticks (or trackpoints), and touchscreens. Touchpads are well supported
+ * by this driver, touchstick support has not been tested much yet, and
+ * touchscreens have not been tested at all.
+ *
+ * Up to three alternate settings are possible:
+ * setting 0: one int endpoint for relative movement (used by usbhid.ko)
+ * setting 1: one int endpoint for absolute finger position
+ * setting 2 (cPad only): one int endpoint for absolute finger position and
+ * two bulk endpoints for the display (in/out)
+ * This driver uses setting 1.
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/usb.h>
+#include <linux/input.h>
+#include <linux/usb/input.h>
+
+#define USB_VENDOR_ID_SYNAPTICS 0x06cb
+#define USB_DEVICE_ID_SYNAPTICS_TP 0x0001 /* Synaptics USB TouchPad */
+#define USB_DEVICE_ID_SYNAPTICS_INT_TP 0x0002 /* Integrated USB TouchPad */
+#define USB_DEVICE_ID_SYNAPTICS_CPAD 0x0003 /* Synaptics cPad */
+#define USB_DEVICE_ID_SYNAPTICS_TS 0x0006 /* Synaptics TouchScreen */
+#define USB_DEVICE_ID_SYNAPTICS_STICK 0x0007 /* Synaptics USB Styk */
+#define USB_DEVICE_ID_SYNAPTICS_WP 0x0008 /* Synaptics USB WheelPad */
+#define USB_DEVICE_ID_SYNAPTICS_COMP_TP 0x0009 /* Composite USB TouchPad */
+#define USB_DEVICE_ID_SYNAPTICS_WTP 0x0010 /* Wireless TouchPad */
+#define USB_DEVICE_ID_SYNAPTICS_DPAD 0x0013 /* DisplayPad */
+
+#define SYNUSB_TOUCHPAD (1 << 0)
+#define SYNUSB_STICK (1 << 1)
+#define SYNUSB_TOUCHSCREEN (1 << 2)
+#define SYNUSB_AUXDISPLAY (1 << 3) /* For cPad */
+#define SYNUSB_COMBO (1 << 4) /* Composite device (TP + stick) */
+#define SYNUSB_IO_ALWAYS (1 << 5)
+
+#define USB_DEVICE_SYNAPTICS(prod, kind) \
+ USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, \
+ USB_DEVICE_ID_SYNAPTICS_##prod), \
+ .driver_info = (kind),
+
+#define SYNUSB_RECV_SIZE 8
+
+#define XMIN_NOMINAL 1472
+#define XMAX_NOMINAL 5472
+#define YMIN_NOMINAL 1408
+#define YMAX_NOMINAL 4448
+
+struct synusb {
+ struct usb_device *udev;
+ struct usb_interface *intf;
+ struct urb *urb;
+ unsigned char *data;
+
+ /* input device related data structures */
+ struct input_dev *input;
+ char name[128];
+ char phys[64];
+
+ /* characteristics of the device */
+ unsigned long flags;
+};
+
+static void synusb_report_buttons(struct synusb *synusb)
+{
+ struct input_dev *input_dev = synusb->input;
+
+ input_report_key(input_dev, BTN_LEFT, synusb->data[1] & 0x04);
+ input_report_key(input_dev, BTN_RIGHT, synusb->data[1] & 0x01);
+ input_report_key(input_dev, BTN_MIDDLE, synusb->data[1] & 0x02);
+}
+
+static void synusb_report_stick(struct synusb *synusb)
+{
+ struct input_dev *input_dev = synusb->input;
+ int x, y;
+ unsigned int pressure;
+
+ pressure = synusb->data[6];
+ x = (s16)(be16_to_cpup((__be16 *)&synusb->data[2]) << 3) >> 7;
+ y = (s16)(be16_to_cpup((__be16 *)&synusb->data[4]) << 3) >> 7;
+
+ if (pressure > 0) {
+ input_report_rel(input_dev, REL_X, x);
+ input_report_rel(input_dev, REL_Y, -y);
+ }
+
+ input_report_abs(input_dev, ABS_PRESSURE, pressure);
+
+ synusb_report_buttons(synusb);
+
+ input_sync(input_dev);
+}
+
+static void synusb_report_touchpad(struct synusb *synusb)
+{
+ struct input_dev *input_dev = synusb->input;
+ unsigned int num_fingers, tool_width;
+ unsigned int x, y;
+ unsigned int pressure, w;
+
+ pressure = synusb->data[6];
+ x = be16_to_cpup((__be16 *)&synusb->data[2]);
+ y = be16_to_cpup((__be16 *)&synusb->data[4]);
+ w = synusb->data[0] & 0x0f;
+
+ if (pressure > 0) {
+ num_fingers = 1;
+ tool_width = 5;
+ switch (w) {
+ case 0 ... 1:
+ num_fingers = 2 + w;
+ break;
+
+ case 2: /* pen, pretend its a finger */
+ break;
+
+ case 4 ... 15:
+ tool_width = w;
+ break;
+ }
+ } else {
+ num_fingers = 0;
+ tool_width = 0;
+ }
+
+ /*
+ * Post events
+ * BTN_TOUCH has to be first as mousedev relies on it when doing
+ * absolute -> relative conversion
+ */
+
+ if (pressure > 30)
+ input_report_key(input_dev, BTN_TOUCH, 1);
+ if (pressure < 25)
+ input_report_key(input_dev, BTN_TOUCH, 0);
+
+ if (num_fingers > 0) {
+ input_report_abs(input_dev, ABS_X, x);
+ input_report_abs(input_dev, ABS_Y,
+ YMAX_NOMINAL + YMIN_NOMINAL - y);
+ }
+
+ input_report_abs(input_dev, ABS_PRESSURE, pressure);
+ input_report_abs(input_dev, ABS_TOOL_WIDTH, tool_width);
+
+ input_report_key(input_dev, BTN_TOOL_FINGER, num_fingers == 1);
+ input_report_key(input_dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
+ input_report_key(input_dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
+
+ synusb_report_buttons(synusb);
+ if (synusb->flags & SYNUSB_AUXDISPLAY)
+ input_report_key(input_dev, BTN_MIDDLE, synusb->data[1] & 0x08);
+
+ input_sync(input_dev);
+}
+
+static void synusb_irq(struct urb *urb)
+{
+ struct synusb *synusb = urb->context;
+ int error;
+
+ /* Check our status in case we need to bail out early. */
+ switch (urb->status) {
+ case 0:
+ usb_mark_last_busy(synusb->udev);
+ break;
+
+ /* Device went away so don't keep trying to read from it. */
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ return;
+
+ default:
+ goto resubmit;
+ break;
+ }
+
+ if (synusb->flags & SYNUSB_STICK)
+ synusb_report_stick(synusb);
+ else
+ synusb_report_touchpad(synusb);
+
+resubmit:
+ error = usb_submit_urb(urb, GFP_ATOMIC);
+ if (error && error != -EPERM)
+ dev_err(&synusb->intf->dev,
+ "%s - usb_submit_urb failed with result: %d",
+ __func__, error);
+}
+
+static struct usb_endpoint_descriptor *
+synusb_get_in_endpoint(struct usb_host_interface *iface)
+{
+
+ struct usb_endpoint_descriptor *endpoint;
+ int i;
+
+ for (i = 0; i < iface->desc.bNumEndpoints; ++i) {
+ endpoint = &iface->endpoint[i].desc;
+
+ if (usb_endpoint_is_int_in(endpoint)) {
+ /* we found our interrupt in endpoint */
+ return endpoint;
+ }
+ }
+
+ return NULL;
+}
+
+static int synusb_open(struct input_dev *dev)
+{
+ struct synusb *synusb = input_get_drvdata(dev);
+ int retval;
+
+ retval = usb_autopm_get_interface(synusb->intf);
+ if (retval) {
+ dev_err(&synusb->intf->dev,
+ "%s - usb_autopm_get_interface failed, error: %d\n",
+ __func__, retval);
+ return retval;
+ }
+
+ retval = usb_submit_urb(synusb->urb, GFP_KERNEL);
+ if (retval) {
+ dev_err(&synusb->intf->dev,
+ "%s - usb_submit_urb failed, error: %d\n",
+ __func__, retval);
+ retval = -EIO;
+ goto out;
+ }
+
+ synusb->intf->needs_remote_wakeup = 1;
+
+out:
+ usb_autopm_put_interface(synusb->intf);
+ return retval;
+}
+
+static void synusb_close(struct input_dev *dev)
+{
+ struct synusb *synusb = input_get_drvdata(dev);
+ int autopm_error;
+
+ autopm_error = usb_autopm_get_interface(synusb->intf);
+
+ usb_kill_urb(synusb->urb);
+ synusb->intf->needs_remote_wakeup = 0;
+
+ if (!autopm_error)
+ usb_autopm_put_interface(synusb->intf);
+}
+
+static int synusb_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ struct usb_device *udev = interface_to_usbdev(intf);
+ struct usb_endpoint_descriptor *ep;
+ struct synusb *synusb;
+ struct input_dev *input_dev;
+ unsigned int intf_num = intf->cur_altsetting->desc.bInterfaceNumber;
+ unsigned int altsetting = min(intf->num_altsetting, 1U);
+ int error;
+
+ error = usb_set_interface(udev, intf_num, altsetting);
+ if (error) {
+ dev_err(&udev->dev,
+ "Can not set alternate setting to %i, error: %i",
+ altsetting, error);
+ return error;
+ }
+
+ ep = synusb_get_in_endpoint(intf->cur_altsetting);
+ if (!ep)
+ return -ENODEV;
+
+ synusb = kzalloc(sizeof(*synusb), GFP_KERNEL);
+ input_dev = input_allocate_device();
+ if (!synusb || !input_dev) {
+ error = -ENOMEM;
+ goto err_free_mem;
+ }
+
+ synusb->udev = udev;
+ synusb->intf = intf;
+ synusb->input = input_dev;
+
+ synusb->flags = id->driver_info;
+ if (synusb->flags & SYNUSB_COMBO) {
+ /*
+ * This is a combo device, we need to set proper
+ * capability, depending on the interface.
+ */
+ synusb->flags |= intf_num == 1 ?
+ SYNUSB_STICK : SYNUSB_TOUCHPAD;
+ }
+
+ synusb->urb = usb_alloc_urb(0, GFP_KERNEL);
+ if (!synusb->urb) {
+ error = -ENOMEM;
+ goto err_free_mem;
+ }
+
+ synusb->data = usb_alloc_coherent(udev, SYNUSB_RECV_SIZE, GFP_KERNEL,
+ &synusb->urb->transfer_dma);
+ if (!synusb->data) {
+ error = -ENOMEM;
+ goto err_free_urb;
+ }
+
+ usb_fill_int_urb(synusb->urb, udev,
+ usb_rcvintpipe(udev, ep->bEndpointAddress),
+ synusb->data, SYNUSB_RECV_SIZE,
+ synusb_irq, synusb,
+ ep->bInterval);
+ synusb->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
+
+ if (udev->manufacturer)
+ strlcpy(synusb->name, udev->manufacturer,
+ sizeof(synusb->name));
+
+ if (udev->product) {
+ if (udev->manufacturer)
+ strlcat(synusb->name, " ", sizeof(synusb->name));
+ strlcat(synusb->name, udev->product, sizeof(synusb->name));
+ }
+
+ if (!strlen(synusb->name))
+ snprintf(synusb->name, sizeof(synusb->name),
+ "USB Synaptics Device %04x:%04x",
+ le16_to_cpu(udev->descriptor.idVendor),
+ le16_to_cpu(udev->descriptor.idProduct));
+
+ if (synusb->flags & SYNUSB_STICK)
+ strlcat(synusb->name, " (Stick) ", sizeof(synusb->name));
+
+ usb_make_path(udev, synusb->phys, sizeof(synusb->phys));
+ strlcat(synusb->phys, "/input0", sizeof(synusb->phys));
+
+ input_dev->name = synusb->name;
+ input_dev->phys = synusb->phys;
+ usb_to_input_id(udev, &input_dev->id);
+ input_dev->dev.parent = &synusb->intf->dev;
+
+ if (!(synusb->flags & SYNUSB_IO_ALWAYS)) {
+ input_dev->open = synusb_open;
+ input_dev->close = synusb_close;
+ }
+
+ input_set_drvdata(input_dev, synusb);
+
+ __set_bit(EV_ABS, input_dev->evbit);
+ __set_bit(EV_KEY, input_dev->evbit);
+
+ if (synusb->flags & SYNUSB_STICK) {
+ __set_bit(EV_REL, input_dev->evbit);
+ __set_bit(REL_X, input_dev->relbit);
+ __set_bit(REL_Y, input_dev->relbit);
+ input_set_abs_params(input_dev, ABS_PRESSURE, 0, 127, 0, 0);
+ } else {
+ input_set_abs_params(input_dev, ABS_X,
+ XMIN_NOMINAL, XMAX_NOMINAL, 0, 0);
+ input_set_abs_params(input_dev, ABS_Y,
+ YMIN_NOMINAL, YMAX_NOMINAL, 0, 0);
+ input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0);
+ input_set_abs_params(input_dev, ABS_TOOL_WIDTH, 0, 15, 0, 0);
+ __set_bit(BTN_TOUCH, input_dev->keybit);
+ __set_bit(BTN_TOOL_FINGER, input_dev->keybit);
+ __set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit);
+ __set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit);
+ }
+
+ __set_bit(BTN_LEFT, input_dev->keybit);
+ __set_bit(BTN_RIGHT, input_dev->keybit);
+ __set_bit(BTN_MIDDLE, input_dev->keybit);
+
+ usb_set_intfdata(intf, synusb);
+
+ if (synusb->flags & SYNUSB_IO_ALWAYS) {
+ error = synusb_open(input_dev);
+ if (error)
+ goto err_free_dma;
+ }
+
+ error = input_register_device(input_dev);
+ if (error) {
+ dev_err(&udev->dev,
+ "Failed to register input device, error %d\n",
+ error);
+ goto err_stop_io;
+ }
+
+ return 0;
+
+err_stop_io:
+ if (synusb->flags & SYNUSB_IO_ALWAYS)
+ synusb_close(synusb->input);
+err_free_dma:
+ usb_free_coherent(udev, SYNUSB_RECV_SIZE, synusb->data,
+ synusb->urb->transfer_dma);
+err_free_urb:
+ usb_free_urb(synusb->urb);
+err_free_mem:
+ input_free_device(input_dev);
+ kfree(synusb);
+ usb_set_intfdata(intf, NULL);
+
+ return error;
+}
+
+static void synusb_disconnect(struct usb_interface *intf)
+{
+ struct synusb *synusb = usb_get_intfdata(intf);
+ struct usb_device *udev = interface_to_usbdev(intf);
+
+ if (synusb->flags & SYNUSB_IO_ALWAYS)
+ synusb_close(synusb->input);
+
+ input_unregister_device(synusb->input);
+
+ usb_free_coherent(udev, SYNUSB_RECV_SIZE, synusb->data,
+ synusb->urb->transfer_dma);
+ usb_free_urb(synusb->urb);
+ kfree(synusb);
+
+ usb_set_intfdata(intf, NULL);
+}
+
+static int synusb_suspend(struct usb_interface *intf, pm_message_t message)
+{
+ struct synusb *synusb = usb_get_intfdata(intf);
+ struct input_dev *input_dev = synusb->input;
+
+ mutex_lock(&input_dev->mutex);
+ usb_kill_urb(synusb->urb);
+ mutex_unlock(&input_dev->mutex);
+
+ return 0;
+}
+
+static int synusb_resume(struct usb_interface *intf)
+{
+ struct synusb *synusb = usb_get_intfdata(intf);
+ struct input_dev *input_dev = synusb->input;
+ int retval = 0;
+
+ mutex_lock(&input_dev->mutex);
+
+ if ((input_dev->users || (synusb->flags & SYNUSB_IO_ALWAYS)) &&
+ usb_submit_urb(synusb->urb, GFP_NOIO) < 0) {
+ retval = -EIO;
+ }
+
+ mutex_unlock(&input_dev->mutex);
+
+ return retval;
+}
+
+static int synusb_pre_reset(struct usb_interface *intf)
+{
+ struct synusb *synusb = usb_get_intfdata(intf);
+ struct input_dev *input_dev = synusb->input;
+
+ mutex_lock(&input_dev->mutex);
+ usb_kill_urb(synusb->urb);
+
+ return 0;
+}
+
+static int synusb_post_reset(struct usb_interface *intf)
+{
+ struct synusb *synusb = usb_get_intfdata(intf);
+ struct input_dev *input_dev = synusb->input;
+ int retval = 0;
+
+ if ((input_dev->users || (synusb->flags & SYNUSB_IO_ALWAYS)) &&
+ usb_submit_urb(synusb->urb, GFP_NOIO) < 0) {
+ retval = -EIO;
+ }
+
+ mutex_unlock(&input_dev->mutex);
+
+ return retval;
+}
+
+static int synusb_reset_resume(struct usb_interface *intf)
+{
+ return synusb_resume(intf);
+}
+
+static struct usb_device_id synusb_idtable[] = {
+ { USB_DEVICE_SYNAPTICS(TP, SYNUSB_TOUCHPAD) },
+ { USB_DEVICE_SYNAPTICS(INT_TP, SYNUSB_TOUCHPAD) },
+ { USB_DEVICE_SYNAPTICS(CPAD,
+ SYNUSB_TOUCHPAD | SYNUSB_AUXDISPLAY | SYNUSB_IO_ALWAYS) },
+ { USB_DEVICE_SYNAPTICS(TS, SYNUSB_TOUCHSCREEN) },
+ { USB_DEVICE_SYNAPTICS(STICK, SYNUSB_STICK) },
+ { USB_DEVICE_SYNAPTICS(WP, SYNUSB_TOUCHPAD) },
+ { USB_DEVICE_SYNAPTICS(COMP_TP, SYNUSB_COMBO) },
+ { USB_DEVICE_SYNAPTICS(WTP, SYNUSB_TOUCHPAD) },
+ { USB_DEVICE_SYNAPTICS(DPAD, SYNUSB_TOUCHPAD) },
+ { }
+};
+MODULE_DEVICE_TABLE(usb, synusb_idtable);
+
+static struct usb_driver synusb_driver = {
+ .name = "synaptics_usb",
+ .probe = synusb_probe,
+ .disconnect = synusb_disconnect,
+ .id_table = synusb_idtable,
+ .suspend = synusb_suspend,
+ .resume = synusb_resume,
+ .pre_reset = synusb_pre_reset,
+ .post_reset = synusb_post_reset,
+ .reset_resume = synusb_reset_resume,
+ .supports_autosuspend = 1,
+};
+
+static int __init synusb_init(void)
+{
+ return usb_register(&synusb_driver);
+}
+
+static void __exit synusb_exit(void)
+{
+ usb_deregister(&synusb_driver);
+}
+
+module_init(synusb_init);
+module_exit(synusb_exit);
+
+MODULE_AUTHOR("Rob Miller <rob@inpharmatica.co.uk>, "
+ "Ron Lee <ron@debian.org>, "
+ "Jan Steinhoff <cpad@jan-steinhoff.de>");
+MODULE_DESCRIPTION("Synaptics USB device driver");
+MODULE_LICENSE("GPL");
projects / GitHub / exynos8895 / android_kernel_samsung_universal8895.git / commitdiff