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565 lines
15 KiB
565 lines
15 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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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 ([email protected]) |
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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 ([email protected]) |
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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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* Trademarks are the property of their respective owners. |
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*/ |
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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/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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/* serialize access to open/suspend */ |
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struct mutex pm_mutex; |
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bool is_open; |
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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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mutex_lock(&synusb->pm_mutex); |
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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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synusb->is_open = true; |
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out: |
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mutex_unlock(&synusb->pm_mutex); |
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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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mutex_lock(&synusb->pm_mutex); |
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usb_kill_urb(synusb->urb); |
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synusb->intf->needs_remote_wakeup = 0; |
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synusb->is_open = false; |
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mutex_unlock(&synusb->pm_mutex); |
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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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mutex_init(&synusb->pm_mutex); |
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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)); |
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usb_make_path(udev, synusb->phys, sizeof(synusb->phys)); |
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strlcat(synusb->phys, "/input0", sizeof(synusb->phys)); |
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input_dev->name = synusb->name; |
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input_dev->phys = synusb->phys; |
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usb_to_input_id(udev, &input_dev->id); |
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input_dev->dev.parent = &synusb->intf->dev; |
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if (!(synusb->flags & SYNUSB_IO_ALWAYS)) { |
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input_dev->open = synusb_open; |
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input_dev->close = synusb_close; |
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} |
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input_set_drvdata(input_dev, synusb); |
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__set_bit(EV_ABS, input_dev->evbit); |
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__set_bit(EV_KEY, input_dev->evbit); |
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if (synusb->flags & SYNUSB_STICK) { |
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__set_bit(EV_REL, input_dev->evbit); |
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__set_bit(REL_X, input_dev->relbit); |
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__set_bit(REL_Y, input_dev->relbit); |
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__set_bit(INPUT_PROP_POINTING_STICK, input_dev->propbit); |
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input_set_abs_params(input_dev, ABS_PRESSURE, 0, 127, 0, 0); |
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} else { |
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input_set_abs_params(input_dev, ABS_X, |
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XMIN_NOMINAL, XMAX_NOMINAL, 0, 0); |
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input_set_abs_params(input_dev, ABS_Y, |
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YMIN_NOMINAL, YMAX_NOMINAL, 0, 0); |
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input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0); |
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input_set_abs_params(input_dev, ABS_TOOL_WIDTH, 0, 15, 0, 0); |
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__set_bit(BTN_TOUCH, input_dev->keybit); |
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__set_bit(BTN_TOOL_FINGER, input_dev->keybit); |
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__set_bit(BTN_TOOL_DOUBLETAP, input_dev->keybit); |
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__set_bit(BTN_TOOL_TRIPLETAP, input_dev->keybit); |
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} |
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if (synusb->flags & SYNUSB_TOUCHSCREEN) |
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__set_bit(INPUT_PROP_DIRECT, input_dev->propbit); |
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else |
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__set_bit(INPUT_PROP_POINTER, input_dev->propbit); |
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__set_bit(BTN_LEFT, input_dev->keybit); |
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__set_bit(BTN_RIGHT, input_dev->keybit); |
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__set_bit(BTN_MIDDLE, input_dev->keybit); |
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usb_set_intfdata(intf, synusb); |
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if (synusb->flags & SYNUSB_IO_ALWAYS) { |
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error = synusb_open(input_dev); |
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if (error) |
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goto err_free_dma; |
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} |
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error = input_register_device(input_dev); |
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if (error) { |
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dev_err(&udev->dev, |
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"Failed to register input device, error %d\n", |
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error); |
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goto err_stop_io; |
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} |
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return 0; |
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err_stop_io: |
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if (synusb->flags & SYNUSB_IO_ALWAYS) |
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synusb_close(synusb->input); |
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err_free_dma: |
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usb_free_coherent(udev, SYNUSB_RECV_SIZE, synusb->data, |
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synusb->urb->transfer_dma); |
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err_free_urb: |
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usb_free_urb(synusb->urb); |
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err_free_mem: |
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input_free_device(input_dev); |
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kfree(synusb); |
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usb_set_intfdata(intf, NULL); |
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return error; |
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} |
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static void synusb_disconnect(struct usb_interface *intf) |
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{ |
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struct synusb *synusb = usb_get_intfdata(intf); |
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struct usb_device *udev = interface_to_usbdev(intf); |
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if (synusb->flags & SYNUSB_IO_ALWAYS) |
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synusb_close(synusb->input); |
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input_unregister_device(synusb->input); |
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usb_free_coherent(udev, SYNUSB_RECV_SIZE, synusb->data, |
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synusb->urb->transfer_dma); |
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usb_free_urb(synusb->urb); |
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kfree(synusb); |
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usb_set_intfdata(intf, NULL); |
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} |
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static int synusb_suspend(struct usb_interface *intf, pm_message_t message) |
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{ |
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struct synusb *synusb = usb_get_intfdata(intf); |
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mutex_lock(&synusb->pm_mutex); |
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usb_kill_urb(synusb->urb); |
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mutex_unlock(&synusb->pm_mutex); |
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return 0; |
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} |
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static int synusb_resume(struct usb_interface *intf) |
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{ |
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struct synusb *synusb = usb_get_intfdata(intf); |
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int retval = 0; |
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mutex_lock(&synusb->pm_mutex); |
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if ((synusb->is_open || (synusb->flags & SYNUSB_IO_ALWAYS)) && |
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usb_submit_urb(synusb->urb, GFP_NOIO) < 0) { |
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retval = -EIO; |
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} |
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mutex_unlock(&synusb->pm_mutex); |
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return retval; |
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} |
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static int synusb_pre_reset(struct usb_interface *intf) |
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{ |
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struct synusb *synusb = usb_get_intfdata(intf); |
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mutex_lock(&synusb->pm_mutex); |
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usb_kill_urb(synusb->urb); |
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return 0; |
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} |
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static int synusb_post_reset(struct usb_interface *intf) |
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{ |
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struct synusb *synusb = usb_get_intfdata(intf); |
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int retval = 0; |
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if ((synusb->is_open || (synusb->flags & SYNUSB_IO_ALWAYS)) && |
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usb_submit_urb(synusb->urb, GFP_NOIO) < 0) { |
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retval = -EIO; |
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} |
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mutex_unlock(&synusb->pm_mutex); |
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return retval; |
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} |
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static int synusb_reset_resume(struct usb_interface *intf) |
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{ |
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return synusb_resume(intf); |
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} |
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static const struct usb_device_id synusb_idtable[] = { |
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{ USB_DEVICE_SYNAPTICS(TP, SYNUSB_TOUCHPAD) }, |
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{ USB_DEVICE_SYNAPTICS(INT_TP, SYNUSB_TOUCHPAD) }, |
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{ USB_DEVICE_SYNAPTICS(CPAD, |
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SYNUSB_TOUCHPAD | SYNUSB_AUXDISPLAY | SYNUSB_IO_ALWAYS) }, |
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{ USB_DEVICE_SYNAPTICS(TS, SYNUSB_TOUCHSCREEN) }, |
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{ USB_DEVICE_SYNAPTICS(STICK, SYNUSB_STICK) }, |
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{ USB_DEVICE_SYNAPTICS(WP, SYNUSB_TOUCHPAD) }, |
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{ USB_DEVICE_SYNAPTICS(COMP_TP, SYNUSB_COMBO) }, |
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{ USB_DEVICE_SYNAPTICS(WTP, SYNUSB_TOUCHPAD) }, |
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{ USB_DEVICE_SYNAPTICS(DPAD, SYNUSB_TOUCHPAD) }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(usb, synusb_idtable); |
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static struct usb_driver synusb_driver = { |
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.name = "synaptics_usb", |
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.probe = synusb_probe, |
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.disconnect = synusb_disconnect, |
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.id_table = synusb_idtable, |
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.suspend = synusb_suspend, |
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.resume = synusb_resume, |
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.pre_reset = synusb_pre_reset, |
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.post_reset = synusb_post_reset, |
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.reset_resume = synusb_reset_resume, |
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.supports_autosuspend = 1, |
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}; |
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module_usb_driver(synusb_driver); |
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MODULE_AUTHOR("Rob Miller <[email protected]>, " |
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"Ron Lee <[email protected]>, " |
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"Jan Steinhoff <[email protected]>"); |
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MODULE_DESCRIPTION("Synaptics USB device driver"); |
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MODULE_LICENSE("GPL");
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