3 files changed, 586 insertions, 0 deletions

diff --git a/drivers/input/mouse/Kconfig b/drivers/input/mouse/Kconfig
index 9c1e6ee83531..9b8db821d5f0 100644
--- a/drivers/input/mouse/Kconfig
+++ b/drivers/input/mouse/Kconfig
@@ -322,4 +322,21 @@ config MOUSE_SYNAPTICS_I2C
           To compile this driver as a module, choose M here: the
           module will be called synaptics_i2c.
 
+config MOUSE_SYNAPTICS_USB
+        tristate "Synaptics USB device support"
+        depends on USB_ARCH_HAS_HCD
+        select USB
+        help
+          Say Y here if you want to use a Synaptics USB touchpad or pointing
+          stick.
+
+          While these devices emulate an USB mouse by default and can be used
+          with standard usbhid driver, this driver, together with its X.Org
+          counterpart, allows you to fully utilize capabilities of the device.
+          More information can be found at:
+          <http://jan-steinhoff.de/linux/synaptics-usb.html>
+
+          To compile this driver as a module, choose M here: the
+          module will be called synaptics_usb.
+
 endif
diff --git a/drivers/input/mouse/Makefile b/drivers/input/mouse/Makefile
index 570c84a4a654..4718effeb8d9 100644
--- a/drivers/input/mouse/Makefile
+++ b/drivers/input/mouse/Makefile
@@ -18,6 +18,7 @@ obj-$(CONFIG_MOUSE_PXA930_TRKBALL)	+= pxa930_trkball.o
 obj-$(CONFIG_MOUSE_RISCPC)              += rpcmouse.o
 obj-$(CONFIG_MOUSE_SERIAL)              += sermouse.o
 obj-$(CONFIG_MOUSE_SYNAPTICS_I2C)       += synaptics_i2c.o
+obj-$(CONFIG_MOUSE_SYNAPTICS_USB)       += synaptics_usb.o
 obj-$(CONFIG_MOUSE_VSXXXAA)             += vsxxxaa.o
 
 psmouse-objs := psmouse-base.o synaptics.o
diff --git a/drivers/input/mouse/synaptics_usb.c b/drivers/input/mouse/synaptics_usb.c
new file mode 100644
index 000000000000..e559a947bb57
--- /dev/null
+++ b/drivers/input/mouse/synaptics_usb.c
@@ -0,0 +1,568 @@
+/*
+ * 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");