// SPDX-License-Identifier: GPL-2.0-or-later /* * Apple USB Touchpad (for post-February 2005 PowerBooks and MacBooks) driver * * Copyright (C) 2001-2004 Greg Kroah-Hartman ([email protected]) * Copyright (C) 2005-2008 Johannes Berg ([email protected]) * Copyright (C) 2005-2008 Stelian Pop ([email protected]) * Copyright (C) 2005 Frank Arnold ([email protected]) * Copyright (C) 2005 Peter Osterlund ([email protected]) * Copyright (C) 2005 Michael Hanselmann ([email protected]) * Copyright (C) 2006 Nicolas Boichat ([email protected]) * Copyright (C) 2007-2008 Sven Anders ([email protected]) * * Thanks to Alex Harper <[email protected]> for his inputs. */ #include <linux/kernel.h> #include <linux/errno.h> #include <linux/slab.h> #include <linux/module.h> #include <linux/usb/input.h> /* * Note: We try to keep the touchpad aspect ratio while still doing only * simple arithmetics: * 0 <= x <= (xsensors - 1) * xfact * 0 <= y <= (ysensors - 1) * yfact */ struct atp_info { … }; static void atp_complete_geyser_1_2(struct urb *urb); static void atp_complete_geyser_3_4(struct urb *urb); static const struct atp_info fountain_info = …; static const struct atp_info geyser1_info = …; static const struct atp_info geyser2_info = …; static const struct atp_info geyser3_info = …; static const struct atp_info geyser4_info = …; #define ATP_DEVICE(prod, info) … /* * Table of devices (Product IDs) that work with this driver. * (The names come from Info.plist in AppleUSBTrackpad.kext, * According to Info.plist Geyser IV is the same as Geyser III.) */ static const struct usb_device_id atp_table[] = …; MODULE_DEVICE_TABLE(usb, atp_table); /* maximum number of sensors */ #define ATP_XSENSORS … #define ATP_YSENSORS … /* * The largest possible bank of sensors with additional buffer of 4 extra values * on either side, for an array of smoothed sensor values. */ #define ATP_SMOOTHSIZE … /* maximum pressure this driver will report */ #define ATP_PRESSURE … /* * Threshold for the touchpad sensors. Any change less than ATP_THRESHOLD is * ignored. */ #define ATP_THRESHOLD … /* * How far we'll bitshift our sensor values before averaging them. Mitigates * rounding errors. */ #define ATP_SCALE … /* Geyser initialization constants */ #define ATP_GEYSER_MODE_READ_REQUEST_ID … #define ATP_GEYSER_MODE_WRITE_REQUEST_ID … #define ATP_GEYSER_MODE_REQUEST_VALUE … #define ATP_GEYSER_MODE_REQUEST_INDEX … #define ATP_GEYSER_MODE_VENDOR_VALUE … /** * enum atp_status_bits - status bit meanings * * These constants represent the meaning of the status bits. * (only Geyser 3/4) * * @ATP_STATUS_BUTTON: The button was pressed * @ATP_STATUS_BASE_UPDATE: Update of the base values (untouched pad) * @ATP_STATUS_FROM_RESET: Reset previously performed */ enum atp_status_bits { … }; /* Structure to hold all of our device specific stuff */ struct atp { … }; #define dbg_dump(msg, tab) … #define dprintk(format, a...) … MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; /* * Make the threshold a module parameter */ static int threshold = …; module_param(threshold, int, 0644); MODULE_PARM_DESC(…) …; static int debug; module_param(debug, int, 0644); MODULE_PARM_DESC(…) …; /* * By default newer Geyser devices send standard USB HID mouse * packets (Report ID 2). This code changes device mode, so it * sends raw sensor reports (Report ID 5). */ static int atp_geyser_init(struct atp *dev) { … } /* * Reinitialise the device. This usually stops stream of empty packets * coming from it. */ static void atp_reinit(struct work_struct *work) { … } static int atp_calculate_abs(struct atp *dev, int offset, int nb_sensors, int fact, int *z, int *fingers) { … } static inline void atp_report_fingers(struct input_dev *input, int fingers) { … } /* Check URB status and for correct length of data package */ #define ATP_URB_STATUS_SUCCESS … #define ATP_URB_STATUS_ERROR … #define ATP_URB_STATUS_ERROR_FATAL … static int atp_status_check(struct urb *urb) { … } static void atp_detect_size(struct atp *dev) { … } /* * USB interrupt callback functions */ /* Interrupt function for older touchpads: FOUNTAIN/GEYSER1/GEYSER2 */ static void atp_complete_geyser_1_2(struct urb *urb) { … } /* Interrupt function for older touchpads: GEYSER3/GEYSER4 */ static void atp_complete_geyser_3_4(struct urb *urb) { … } static int atp_open(struct input_dev *input) { … } static void atp_close(struct input_dev *input) { … } static int atp_handle_geyser(struct atp *dev) { … } static int atp_probe(struct usb_interface *iface, const struct usb_device_id *id) { … } static void atp_disconnect(struct usb_interface *iface) { … } static int atp_recover(struct atp *dev) { … } static int atp_suspend(struct usb_interface *iface, pm_message_t message) { … } static int atp_resume(struct usb_interface *iface) { … } static int atp_reset_resume(struct usb_interface *iface) { … } static struct usb_driver atp_driver = …; module_usb_driver(…) …;
Codebase Browser
linux