2012-02-03 08:21:31 +00:00
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/*
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* USB Synaptics device driver
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*
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* Copyright (c) 2002 Rob Miller (rob@inpharmatica . co . uk)
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* Copyright (c) 2003 Ron Lee (ron@debian.org)
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* cPad driver for kernel 2.4
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*
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* Copyright (c) 2004 Jan Steinhoff (cpad@jan-steinhoff . de)
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* Copyright (c) 2004 Ron Lee (ron@debian.org)
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* rewritten for kernel 2.6
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*
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* cPad display character device part is not included. It can be found at
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* http://jan-steinhoff.de/linux/synaptics-usb.html
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*
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* Bases on: usb_skeleton.c v2.2 by Greg Kroah-Hartman
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* drivers/hid/usbhid/usbmouse.c by Vojtech Pavlik
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* drivers/input/mouse/synaptics.c by Peter Osterlund
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* Trademarks are the property of their respective owners.
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*/
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/*
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* There are three different types of Synaptics USB devices: Touchpads,
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* touchsticks (or trackpoints), and touchscreens. Touchpads are well supported
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* by this driver, touchstick support has not been tested much yet, and
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* touchscreens have not been tested at all.
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*
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* Up to three alternate settings are possible:
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* setting 0: one int endpoint for relative movement (used by usbhid.ko)
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* setting 1: one int endpoint for absolute finger position
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* setting 2 (cPad only): one int endpoint for absolute finger position and
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* two bulk endpoints for the display (in/out)
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* This driver uses setting 1.
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*/
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#include <linux/kernel.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/usb.h>
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#include <linux/input.h>
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#include <linux/usb/input.h>
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#define USB_VENDOR_ID_SYNAPTICS 0x06cb
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#define USB_DEVICE_ID_SYNAPTICS_TP 0x0001 /* Synaptics USB TouchPad */
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#define USB_DEVICE_ID_SYNAPTICS_INT_TP 0x0002 /* Integrated USB TouchPad */
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#define USB_DEVICE_ID_SYNAPTICS_CPAD 0x0003 /* Synaptics cPad */
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#define USB_DEVICE_ID_SYNAPTICS_TS 0x0006 /* Synaptics TouchScreen */
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#define USB_DEVICE_ID_SYNAPTICS_STICK 0x0007 /* Synaptics USB Styk */
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#define USB_DEVICE_ID_SYNAPTICS_WP 0x0008 /* Synaptics USB WheelPad */
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#define USB_DEVICE_ID_SYNAPTICS_COMP_TP 0x0009 /* Composite USB TouchPad */
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#define USB_DEVICE_ID_SYNAPTICS_WTP 0x0010 /* Wireless TouchPad */
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#define USB_DEVICE_ID_SYNAPTICS_DPAD 0x0013 /* DisplayPad */
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#define SYNUSB_TOUCHPAD (1 << 0)
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#define SYNUSB_STICK (1 << 1)
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#define SYNUSB_TOUCHSCREEN (1 << 2)
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#define SYNUSB_AUXDISPLAY (1 << 3) /* For cPad */
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#define SYNUSB_COMBO (1 << 4) /* Composite device (TP + stick) */
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#define SYNUSB_IO_ALWAYS (1 << 5)
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#define USB_DEVICE_SYNAPTICS(prod, kind) \
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USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, \
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USB_DEVICE_ID_SYNAPTICS_##prod), \
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.driver_info = (kind),
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#define SYNUSB_RECV_SIZE 8
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#define XMIN_NOMINAL 1472
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#define XMAX_NOMINAL 5472
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#define YMIN_NOMINAL 1408
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#define YMAX_NOMINAL 4448
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struct synusb {
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struct usb_device *udev;
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struct usb_interface *intf;
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struct urb *urb;
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unsigned char *data;
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/* input device related data structures */
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struct input_dev *input;
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char name[128];
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char phys[64];
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/* characteristics of the device */
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unsigned long flags;
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};
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static void synusb_report_buttons(struct synusb *synusb)
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{
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struct input_dev *input_dev = synusb->input;
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input_report_key(input_dev, BTN_LEFT, synusb->data[1] & 0x04);
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input_report_key(input_dev, BTN_RIGHT, synusb->data[1] & 0x01);
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input_report_key(input_dev, BTN_MIDDLE, synusb->data[1] & 0x02);
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}
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static void synusb_report_stick(struct synusb *synusb)
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{
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struct input_dev *input_dev = synusb->input;
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int x, y;
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unsigned int pressure;
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pressure = synusb->data[6];
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x = (s16)(be16_to_cpup((__be16 *)&synusb->data[2]) << 3) >> 7;
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y = (s16)(be16_to_cpup((__be16 *)&synusb->data[4]) << 3) >> 7;
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if (pressure > 0) {
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input_report_rel(input_dev, REL_X, x);
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input_report_rel(input_dev, REL_Y, -y);
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}
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input_report_abs(input_dev, ABS_PRESSURE, pressure);
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synusb_report_buttons(synusb);
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input_sync(input_dev);
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}
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static void synusb_report_touchpad(struct synusb *synusb)
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{
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struct input_dev *input_dev = synusb->input;
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unsigned int num_fingers, tool_width;
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unsigned int x, y;
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unsigned int pressure, w;
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pressure = synusb->data[6];
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x = be16_to_cpup((__be16 *)&synusb->data[2]);
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y = be16_to_cpup((__be16 *)&synusb->data[4]);
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w = synusb->data[0] & 0x0f;
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if (pressure > 0) {
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num_fingers = 1;
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tool_width = 5;
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switch (w) {
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case 0 ... 1:
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num_fingers = 2 + w;
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break;
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case 2: /* pen, pretend its a finger */
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break;
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case 4 ... 15:
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tool_width = w;
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break;
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}
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} else {
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num_fingers = 0;
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tool_width = 0;
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}
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/*
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* Post events
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* BTN_TOUCH has to be first as mousedev relies on it when doing
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* absolute -> relative conversion
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*/
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if (pressure > 30)
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input_report_key(input_dev, BTN_TOUCH, 1);
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if (pressure < 25)
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input_report_key(input_dev, BTN_TOUCH, 0);
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if (num_fingers > 0) {
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input_report_abs(input_dev, ABS_X, x);
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input_report_abs(input_dev, ABS_Y,
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YMAX_NOMINAL + YMIN_NOMINAL - y);
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}
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input_report_abs(input_dev, ABS_PRESSURE, pressure);
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input_report_abs(input_dev, ABS_TOOL_WIDTH, tool_width);
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input_report_key(input_dev, BTN_TOOL_FINGER, num_fingers == 1);
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input_report_key(input_dev, BTN_TOOL_DOUBLETAP, num_fingers == 2);
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input_report_key(input_dev, BTN_TOOL_TRIPLETAP, num_fingers == 3);
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synusb_report_buttons(synusb);
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if (synusb->flags & SYNUSB_AUXDISPLAY)
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input_report_key(input_dev, BTN_MIDDLE, synusb->data[1] & 0x08);
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input_sync(input_dev);
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}
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static void synusb_irq(struct urb *urb)
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{
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struct synusb *synusb = urb->context;
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int error;
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/* Check our status in case we need to bail out early. */
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switch (urb->status) {
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case 0:
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usb_mark_last_busy(synusb->udev);
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break;
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/* Device went away so don't keep trying to read from it. */
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case -ECONNRESET:
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case -ENOENT:
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case -ESHUTDOWN:
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return;
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default:
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goto resubmit;
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break;
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}
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if (synusb->flags & SYNUSB_STICK)
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synusb_report_stick(synusb);
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else
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synusb_report_touchpad(synusb);
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resubmit:
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error = usb_submit_urb(urb, GFP_ATOMIC);
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if (error && error != -EPERM)
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dev_err(&synusb->intf->dev,
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"%s - usb_submit_urb failed with result: %d",
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__func__, error);
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}
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static struct usb_endpoint_descriptor *
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synusb_get_in_endpoint(struct usb_host_interface *iface)
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{
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struct usb_endpoint_descriptor *endpoint;
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int i;
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for (i = 0; i < iface->desc.bNumEndpoints; ++i) {
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endpoint = &iface->endpoint[i].desc;
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if (usb_endpoint_is_int_in(endpoint)) {
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/* we found our interrupt in endpoint */
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return endpoint;
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}
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}
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return NULL;
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}
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static int synusb_open(struct input_dev *dev)
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{
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struct synusb *synusb = input_get_drvdata(dev);
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int retval;
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retval = usb_autopm_get_interface(synusb->intf);
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if (retval) {
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dev_err(&synusb->intf->dev,
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"%s - usb_autopm_get_interface failed, error: %d\n",
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__func__, retval);
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return retval;
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}
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retval = usb_submit_urb(synusb->urb, GFP_KERNEL);
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if (retval) {
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dev_err(&synusb->intf->dev,
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"%s - usb_submit_urb failed, error: %d\n",
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__func__, retval);
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retval = -EIO;
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goto out;
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}
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synusb->intf->needs_remote_wakeup = 1;
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out:
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usb_autopm_put_interface(synusb->intf);
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return retval;
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}
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static void synusb_close(struct input_dev *dev)
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{
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struct synusb *synusb = input_get_drvdata(dev);
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int autopm_error;
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autopm_error = usb_autopm_get_interface(synusb->intf);
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usb_kill_urb(synusb->urb);
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synusb->intf->needs_remote_wakeup = 0;
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if (!autopm_error)
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usb_autopm_put_interface(synusb->intf);
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}
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static int synusb_probe(struct usb_interface *intf,
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const struct usb_device_id *id)
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{
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struct usb_device *udev = interface_to_usbdev(intf);
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struct usb_endpoint_descriptor *ep;
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struct synusb *synusb;
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struct input_dev *input_dev;
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unsigned int intf_num = intf->cur_altsetting->desc.bInterfaceNumber;
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unsigned int altsetting = min(intf->num_altsetting, 1U);
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int error;
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error = usb_set_interface(udev, intf_num, altsetting);
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if (error) {
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dev_err(&udev->dev,
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"Can not set alternate setting to %i, error: %i",
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altsetting, error);
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return error;
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}
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ep = synusb_get_in_endpoint(intf->cur_altsetting);
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if (!ep)
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return -ENODEV;
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synusb = kzalloc(sizeof(*synusb), GFP_KERNEL);
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input_dev = input_allocate_device();
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if (!synusb || !input_dev) {
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error = -ENOMEM;
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goto err_free_mem;
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}
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synusb->udev = udev;
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synusb->intf = intf;
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synusb->input = input_dev;
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synusb->flags = id->driver_info;
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if (synusb->flags & SYNUSB_COMBO) {
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/*
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* This is a combo device, we need to set proper
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* capability, depending on the interface.
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*/
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synusb->flags |= intf_num == 1 ?
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SYNUSB_STICK : SYNUSB_TOUCHPAD;
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}
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synusb->urb = usb_alloc_urb(0, GFP_KERNEL);
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if (!synusb->urb) {
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error = -ENOMEM;
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goto err_free_mem;
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}
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synusb->data = usb_alloc_coherent(udev, SYNUSB_RECV_SIZE, GFP_KERNEL,
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&synusb->urb->transfer_dma);
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if (!synusb->data) {
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error = -ENOMEM;
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goto err_free_urb;
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}
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usb_fill_int_urb(synusb->urb, udev,
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usb_rcvintpipe(udev, ep->bEndpointAddress),
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synusb->data, SYNUSB_RECV_SIZE,
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synusb_irq, synusb,
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ep->bInterval);
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synusb->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
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if (udev->manufacturer)
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strlcpy(synusb->name, udev->manufacturer,
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sizeof(synusb->name));
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if (udev->product) {
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if (udev->manufacturer)
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strlcat(synusb->name, " ", sizeof(synusb->name));
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strlcat(synusb->name, udev->product, sizeof(synusb->name));
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}
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if (!strlen(synusb->name))
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snprintf(synusb->name, sizeof(synusb->name),
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"USB Synaptics Device %04x:%04x",
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le16_to_cpu(udev->descriptor.idVendor),
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le16_to_cpu(udev->descriptor.idProduct));
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if (synusb->flags & SYNUSB_STICK)
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|
|
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,
|
|
|
|
};
|
|
|
|
|
2012-03-17 06:05:44 +00:00
|
|
|
module_usb_driver(synusb_driver);
|
2012-02-03 08:21:31 +00:00
|
|
|
|
|
|
|
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");
|