05e882f890
The appletouch driver is prone to reporting multiple fingers when only one is pressing. The appletouch driver queries an array of pressure sensors and counts local maxima in pressure to determine the number of fingers. It just does this on the raw values, so a data stream like: 0 100 250 300 299 300 250 100 0 actually registers as 2 fingers. This patch updates the logic to ignore small dips in pressure that are less than the threshold. Signed-off-by: Jeremy Huddleston <jeremyhu@freedesktop.org> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
952 lines
24 KiB
C
952 lines
24 KiB
C
/*
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* Apple USB Touchpad (for post-February 2005 PowerBooks and MacBooks) driver
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*
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* Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
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* Copyright (C) 2005-2008 Johannes Berg (johannes@sipsolutions.net)
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* Copyright (C) 2005-2008 Stelian Pop (stelian@popies.net)
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* Copyright (C) 2005 Frank Arnold (frank@scirocco-5v-turbo.de)
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* Copyright (C) 2005 Peter Osterlund (petero2@telia.com)
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* Copyright (C) 2005 Michael Hanselmann (linux-kernel@hansmi.ch)
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* Copyright (C) 2006 Nicolas Boichat (nicolas@boichat.ch)
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* Copyright (C) 2007-2008 Sven Anders (anders@anduras.de)
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*
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* Thanks to Alex Harper <basilisk@foobox.net> for his inputs.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#include <linux/kernel.h>
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#include <linux/errno.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/usb/input.h>
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/*
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* Note: We try to keep the touchpad aspect ratio while still doing only
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* simple arithmetics:
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* 0 <= x <= (xsensors - 1) * xfact
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* 0 <= y <= (ysensors - 1) * yfact
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*/
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struct atp_info {
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int xsensors; /* number of X sensors */
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int xsensors_17; /* 17" models have more sensors */
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int ysensors; /* number of Y sensors */
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int xfact; /* X multiplication factor */
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int yfact; /* Y multiplication factor */
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int datalen; /* size of USB transfers */
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void (*callback)(struct urb *); /* callback function */
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};
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static void atp_complete_geyser_1_2(struct urb *urb);
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static void atp_complete_geyser_3_4(struct urb *urb);
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static const struct atp_info fountain_info = {
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.xsensors = 16,
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.xsensors_17 = 26,
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.ysensors = 16,
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.xfact = 64,
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.yfact = 43,
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.datalen = 81,
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.callback = atp_complete_geyser_1_2,
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};
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static const struct atp_info geyser1_info = {
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.xsensors = 16,
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.xsensors_17 = 26,
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.ysensors = 16,
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.xfact = 64,
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.yfact = 43,
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.datalen = 81,
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.callback = atp_complete_geyser_1_2,
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};
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static const struct atp_info geyser2_info = {
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.xsensors = 15,
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.xsensors_17 = 20,
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.ysensors = 9,
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.xfact = 64,
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.yfact = 43,
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.datalen = 64,
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.callback = atp_complete_geyser_1_2,
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};
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static const struct atp_info geyser3_info = {
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.xsensors = 20,
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.ysensors = 10,
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.xfact = 64,
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.yfact = 64,
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.datalen = 64,
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.callback = atp_complete_geyser_3_4,
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};
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static const struct atp_info geyser4_info = {
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.xsensors = 20,
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.ysensors = 10,
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.xfact = 64,
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.yfact = 64,
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.datalen = 64,
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.callback = atp_complete_geyser_3_4,
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};
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#define ATP_DEVICE(prod, info) \
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{ \
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.match_flags = USB_DEVICE_ID_MATCH_DEVICE | \
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USB_DEVICE_ID_MATCH_INT_CLASS | \
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USB_DEVICE_ID_MATCH_INT_PROTOCOL, \
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.idVendor = 0x05ac, /* Apple */ \
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.idProduct = (prod), \
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.bInterfaceClass = 0x03, \
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.bInterfaceProtocol = 0x02, \
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.driver_info = (unsigned long) &info, \
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}
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/*
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* Table of devices (Product IDs) that work with this driver.
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* (The names come from Info.plist in AppleUSBTrackpad.kext,
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* According to Info.plist Geyser IV is the same as Geyser III.)
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*/
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static struct usb_device_id atp_table[] = {
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/* PowerBooks Feb 2005, iBooks G4 */
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ATP_DEVICE(0x020e, fountain_info), /* FOUNTAIN ANSI */
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ATP_DEVICE(0x020f, fountain_info), /* FOUNTAIN ISO */
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ATP_DEVICE(0x030a, fountain_info), /* FOUNTAIN TP ONLY */
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ATP_DEVICE(0x030b, geyser1_info), /* GEYSER 1 TP ONLY */
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/* PowerBooks Oct 2005 */
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ATP_DEVICE(0x0214, geyser2_info), /* GEYSER 2 ANSI */
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ATP_DEVICE(0x0215, geyser2_info), /* GEYSER 2 ISO */
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ATP_DEVICE(0x0216, geyser2_info), /* GEYSER 2 JIS */
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/* Core Duo MacBook & MacBook Pro */
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ATP_DEVICE(0x0217, geyser3_info), /* GEYSER 3 ANSI */
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ATP_DEVICE(0x0218, geyser3_info), /* GEYSER 3 ISO */
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ATP_DEVICE(0x0219, geyser3_info), /* GEYSER 3 JIS */
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/* Core2 Duo MacBook & MacBook Pro */
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ATP_DEVICE(0x021a, geyser4_info), /* GEYSER 4 ANSI */
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ATP_DEVICE(0x021b, geyser4_info), /* GEYSER 4 ISO */
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ATP_DEVICE(0x021c, geyser4_info), /* GEYSER 4 JIS */
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/* Core2 Duo MacBook3,1 */
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ATP_DEVICE(0x0229, geyser4_info), /* GEYSER 4 HF ANSI */
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ATP_DEVICE(0x022a, geyser4_info), /* GEYSER 4 HF ISO */
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ATP_DEVICE(0x022b, geyser4_info), /* GEYSER 4 HF JIS */
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/* Terminating entry */
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{ }
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};
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MODULE_DEVICE_TABLE(usb, atp_table);
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/* maximum number of sensors */
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#define ATP_XSENSORS 26
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#define ATP_YSENSORS 16
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/* amount of fuzz this touchpad generates */
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#define ATP_FUZZ 16
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/* maximum pressure this driver will report */
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#define ATP_PRESSURE 300
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/*
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* Threshold for the touchpad sensors. Any change less than ATP_THRESHOLD is
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* ignored.
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*/
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#define ATP_THRESHOLD 5
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/* Geyser initialization constants */
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#define ATP_GEYSER_MODE_READ_REQUEST_ID 1
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#define ATP_GEYSER_MODE_WRITE_REQUEST_ID 9
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#define ATP_GEYSER_MODE_REQUEST_VALUE 0x300
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#define ATP_GEYSER_MODE_REQUEST_INDEX 0
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#define ATP_GEYSER_MODE_VENDOR_VALUE 0x04
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/**
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* enum atp_status_bits - status bit meanings
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*
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* These constants represent the meaning of the status bits.
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* (only Geyser 3/4)
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*
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* @ATP_STATUS_BUTTON: The button was pressed
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* @ATP_STATUS_BASE_UPDATE: Update of the base values (untouched pad)
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* @ATP_STATUS_FROM_RESET: Reset previously performed
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*/
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enum atp_status_bits {
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ATP_STATUS_BUTTON = BIT(0),
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ATP_STATUS_BASE_UPDATE = BIT(2),
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ATP_STATUS_FROM_RESET = BIT(4),
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};
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/* Structure to hold all of our device specific stuff */
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struct atp {
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char phys[64];
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struct usb_device *udev; /* usb device */
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struct urb *urb; /* usb request block */
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u8 *data; /* transferred data */
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struct input_dev *input; /* input dev */
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const struct atp_info *info; /* touchpad model */
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bool open;
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bool valid; /* are the samples valid? */
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bool size_detect_done;
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bool overflow_warned;
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int x_old; /* last reported x/y, */
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int y_old; /* used for smoothing */
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signed char xy_cur[ATP_XSENSORS + ATP_YSENSORS];
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signed char xy_old[ATP_XSENSORS + ATP_YSENSORS];
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int xy_acc[ATP_XSENSORS + ATP_YSENSORS];
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int idlecount; /* number of empty packets */
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struct work_struct work;
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};
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#define dbg_dump(msg, tab) \
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if (debug > 1) { \
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int __i; \
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printk(KERN_DEBUG "appletouch: %s", msg); \
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for (__i = 0; __i < ATP_XSENSORS + ATP_YSENSORS; __i++) \
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printk(" %02x", tab[__i]); \
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printk("\n"); \
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}
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#define dprintk(format, a...) \
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do { \
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if (debug) \
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printk(KERN_DEBUG format, ##a); \
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} while (0)
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MODULE_AUTHOR("Johannes Berg");
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MODULE_AUTHOR("Stelian Pop");
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MODULE_AUTHOR("Frank Arnold");
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MODULE_AUTHOR("Michael Hanselmann");
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MODULE_AUTHOR("Sven Anders");
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MODULE_DESCRIPTION("Apple PowerBook and MacBook USB touchpad driver");
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MODULE_LICENSE("GPL");
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/*
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* Make the threshold a module parameter
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*/
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static int threshold = ATP_THRESHOLD;
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module_param(threshold, int, 0644);
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MODULE_PARM_DESC(threshold, "Discard any change in data from a sensor"
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" (the trackpad has many of these sensors)"
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" less than this value.");
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static int debug;
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "Activate debugging output");
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/*
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* By default newer Geyser devices send standard USB HID mouse
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* packets (Report ID 2). This code changes device mode, so it
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* sends raw sensor reports (Report ID 5).
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*/
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static int atp_geyser_init(struct usb_device *udev)
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{
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char *data;
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int size;
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int i;
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int ret;
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data = kmalloc(8, GFP_KERNEL);
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if (!data) {
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err("Out of memory");
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return -ENOMEM;
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}
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size = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
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ATP_GEYSER_MODE_READ_REQUEST_ID,
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USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
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ATP_GEYSER_MODE_REQUEST_VALUE,
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ATP_GEYSER_MODE_REQUEST_INDEX, data, 8, 5000);
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if (size != 8) {
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dprintk("atp_geyser_init: read error\n");
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for (i = 0; i < 8; i++)
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dprintk("appletouch[%d]: %d\n", i, data[i]);
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err("Failed to read mode from device.");
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ret = -EIO;
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goto out_free;
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}
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/* Apply the mode switch */
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data[0] = ATP_GEYSER_MODE_VENDOR_VALUE;
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size = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
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ATP_GEYSER_MODE_WRITE_REQUEST_ID,
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USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
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ATP_GEYSER_MODE_REQUEST_VALUE,
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ATP_GEYSER_MODE_REQUEST_INDEX, data, 8, 5000);
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if (size != 8) {
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dprintk("atp_geyser_init: write error\n");
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for (i = 0; i < 8; i++)
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dprintk("appletouch[%d]: %d\n", i, data[i]);
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err("Failed to request geyser raw mode");
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ret = -EIO;
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goto out_free;
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}
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ret = 0;
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out_free:
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kfree(data);
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return ret;
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}
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/*
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* Reinitialise the device. This usually stops stream of empty packets
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* coming from it.
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*/
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static void atp_reinit(struct work_struct *work)
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{
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struct atp *dev = container_of(work, struct atp, work);
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struct usb_device *udev = dev->udev;
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int retval;
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dprintk("appletouch: putting appletouch to sleep (reinit)\n");
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atp_geyser_init(udev);
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retval = usb_submit_urb(dev->urb, GFP_ATOMIC);
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if (retval)
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err("atp_reinit: usb_submit_urb failed with error %d",
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retval);
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}
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static int atp_calculate_abs(int *xy_sensors, int nb_sensors, int fact,
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int *z, int *fingers)
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{
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int i;
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/* values to calculate mean */
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int pcum = 0, psum = 0;
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int is_increasing = 0;
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*fingers = 0;
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for (i = 0; i < nb_sensors; i++) {
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if (xy_sensors[i] < threshold) {
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if (is_increasing)
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is_increasing = 0;
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continue;
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}
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/*
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* Makes the finger detection more versatile. For example,
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* two fingers with no gap will be detected. Also, my
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* tests show it less likely to have intermittent loss
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* of multiple finger readings while moving around (scrolling).
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*
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* Changes the multiple finger detection to counting humps on
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* sensors (transitions from nonincreasing to increasing)
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* instead of counting transitions from low sensors (no
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* finger reading) to high sensors (finger above
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* sensor)
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*
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* - Jason Parekh <jasonparekh@gmail.com>
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*/
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if (i < 1 ||
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(!is_increasing && xy_sensors[i - 1] < xy_sensors[i])) {
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(*fingers)++;
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is_increasing = 1;
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} else if (i > 0 && (xy_sensors[i - 1] - xy_sensors[i] > threshold)) {
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is_increasing = 0;
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}
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/*
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* Subtracts threshold so a high sensor that just passes the
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* threshold won't skew the calculated absolute coordinate.
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* Fixes an issue where slowly moving the mouse would
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* occasionally jump a number of pixels (slowly moving the
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* finger makes this issue most apparent.)
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*/
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pcum += (xy_sensors[i] - threshold) * i;
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psum += (xy_sensors[i] - threshold);
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}
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if (psum > 0) {
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*z = psum;
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return pcum * fact / psum;
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}
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return 0;
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}
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static inline void atp_report_fingers(struct input_dev *input, int fingers)
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{
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input_report_key(input, BTN_TOOL_FINGER, fingers == 1);
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input_report_key(input, BTN_TOOL_DOUBLETAP, fingers == 2);
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input_report_key(input, BTN_TOOL_TRIPLETAP, fingers > 2);
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}
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/* Check URB status and for correct length of data package */
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#define ATP_URB_STATUS_SUCCESS 0
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#define ATP_URB_STATUS_ERROR 1
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#define ATP_URB_STATUS_ERROR_FATAL 2
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static int atp_status_check(struct urb *urb)
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{
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struct atp *dev = urb->context;
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switch (urb->status) {
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case 0:
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/* success */
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break;
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case -EOVERFLOW:
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if (!dev->overflow_warned) {
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printk(KERN_WARNING "appletouch: OVERFLOW with data "
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"length %d, actual length is %d\n",
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dev->info->datalen, dev->urb->actual_length);
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dev->overflow_warned = true;
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}
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case -ECONNRESET:
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case -ENOENT:
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case -ESHUTDOWN:
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/* This urb is terminated, clean up */
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dbg("atp_complete: urb shutting down with status: %d",
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urb->status);
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return ATP_URB_STATUS_ERROR_FATAL;
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default:
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dbg("atp_complete: nonzero urb status received: %d",
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urb->status);
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return ATP_URB_STATUS_ERROR;
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}
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/* drop incomplete datasets */
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if (dev->urb->actual_length != dev->info->datalen) {
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dprintk("appletouch: incomplete data package"
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" (first byte: %d, length: %d).\n",
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dev->data[0], dev->urb->actual_length);
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return ATP_URB_STATUS_ERROR;
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}
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return ATP_URB_STATUS_SUCCESS;
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}
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static void atp_detect_size(struct atp *dev)
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{
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int i;
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/* 17" Powerbooks have extra X sensors */
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for (i = dev->info->xsensors; i < ATP_XSENSORS; i++) {
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if (dev->xy_cur[i]) {
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printk(KERN_INFO "appletouch: 17\" model detected.\n");
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input_set_abs_params(dev->input, ABS_X, 0,
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(dev->info->xsensors_17 - 1) *
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dev->info->xfact - 1,
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ATP_FUZZ, 0);
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break;
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}
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}
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}
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/*
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* USB interrupt callback functions
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*/
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/* Interrupt function for older touchpads: FOUNTAIN/GEYSER1/GEYSER2 */
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static void atp_complete_geyser_1_2(struct urb *urb)
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{
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int x, y, x_z, y_z, x_f, y_f;
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int retval, i, j;
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int key;
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struct atp *dev = urb->context;
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int status = atp_status_check(urb);
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if (status == ATP_URB_STATUS_ERROR_FATAL)
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return;
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else if (status == ATP_URB_STATUS_ERROR)
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goto exit;
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/* reorder the sensors values */
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if (dev->info == &geyser2_info) {
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memset(dev->xy_cur, 0, sizeof(dev->xy_cur));
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/*
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* The values are laid out like this:
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* Y1, Y2, -, Y3, Y4, -, ..., X1, X2, -, X3, X4, -, ...
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* '-' is an unused value.
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*/
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/* read X values */
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for (i = 0, j = 19; i < 20; i += 2, j += 3) {
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dev->xy_cur[i] = dev->data[j];
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|
dev->xy_cur[i + 1] = dev->data[j + 1];
|
|
}
|
|
|
|
/* read Y values */
|
|
for (i = 0, j = 1; i < 9; i += 2, j += 3) {
|
|
dev->xy_cur[ATP_XSENSORS + i] = dev->data[j];
|
|
dev->xy_cur[ATP_XSENSORS + i + 1] = dev->data[j + 1];
|
|
}
|
|
} else {
|
|
for (i = 0; i < 8; i++) {
|
|
/* X values */
|
|
dev->xy_cur[i + 0] = dev->data[5 * i + 2];
|
|
dev->xy_cur[i + 8] = dev->data[5 * i + 4];
|
|
dev->xy_cur[i + 16] = dev->data[5 * i + 42];
|
|
if (i < 2)
|
|
dev->xy_cur[i + 24] = dev->data[5 * i + 44];
|
|
|
|
/* Y values */
|
|
dev->xy_cur[ATP_XSENSORS + i] = dev->data[5 * i + 1];
|
|
dev->xy_cur[ATP_XSENSORS + i + 8] = dev->data[5 * i + 3];
|
|
}
|
|
}
|
|
|
|
dbg_dump("sample", dev->xy_cur);
|
|
|
|
if (!dev->valid) {
|
|
/* first sample */
|
|
dev->valid = true;
|
|
dev->x_old = dev->y_old = -1;
|
|
|
|
/* Store first sample */
|
|
memcpy(dev->xy_old, dev->xy_cur, sizeof(dev->xy_old));
|
|
|
|
/* Perform size detection, if not done already */
|
|
if (unlikely(!dev->size_detect_done)) {
|
|
atp_detect_size(dev);
|
|
dev->size_detect_done = 1;
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < ATP_XSENSORS + ATP_YSENSORS; i++) {
|
|
/* accumulate the change */
|
|
signed char change = dev->xy_old[i] - dev->xy_cur[i];
|
|
dev->xy_acc[i] -= change;
|
|
|
|
/* prevent down drifting */
|
|
if (dev->xy_acc[i] < 0)
|
|
dev->xy_acc[i] = 0;
|
|
}
|
|
|
|
memcpy(dev->xy_old, dev->xy_cur, sizeof(dev->xy_old));
|
|
|
|
dbg_dump("accumulator", dev->xy_acc);
|
|
|
|
x = atp_calculate_abs(dev->xy_acc, ATP_XSENSORS,
|
|
dev->info->xfact, &x_z, &x_f);
|
|
y = atp_calculate_abs(dev->xy_acc + ATP_XSENSORS, ATP_YSENSORS,
|
|
dev->info->yfact, &y_z, &y_f);
|
|
key = dev->data[dev->info->datalen - 1] & ATP_STATUS_BUTTON;
|
|
|
|
if (x && y) {
|
|
if (dev->x_old != -1) {
|
|
x = (dev->x_old * 3 + x) >> 2;
|
|
y = (dev->y_old * 3 + y) >> 2;
|
|
dev->x_old = x;
|
|
dev->y_old = y;
|
|
|
|
if (debug > 1)
|
|
printk(KERN_DEBUG "appletouch: "
|
|
"X: %3d Y: %3d Xz: %3d Yz: %3d\n",
|
|
x, y, x_z, y_z);
|
|
|
|
input_report_key(dev->input, BTN_TOUCH, 1);
|
|
input_report_abs(dev->input, ABS_X, x);
|
|
input_report_abs(dev->input, ABS_Y, y);
|
|
input_report_abs(dev->input, ABS_PRESSURE,
|
|
min(ATP_PRESSURE, x_z + y_z));
|
|
atp_report_fingers(dev->input, max(x_f, y_f));
|
|
}
|
|
dev->x_old = x;
|
|
dev->y_old = y;
|
|
|
|
} else if (!x && !y) {
|
|
|
|
dev->x_old = dev->y_old = -1;
|
|
input_report_key(dev->input, BTN_TOUCH, 0);
|
|
input_report_abs(dev->input, ABS_PRESSURE, 0);
|
|
atp_report_fingers(dev->input, 0);
|
|
|
|
/* reset the accumulator on release */
|
|
memset(dev->xy_acc, 0, sizeof(dev->xy_acc));
|
|
}
|
|
|
|
input_report_key(dev->input, BTN_LEFT, key);
|
|
input_sync(dev->input);
|
|
|
|
exit:
|
|
retval = usb_submit_urb(dev->urb, GFP_ATOMIC);
|
|
if (retval)
|
|
err("atp_complete: usb_submit_urb failed with result %d",
|
|
retval);
|
|
}
|
|
|
|
/* Interrupt function for older touchpads: GEYSER3/GEYSER4 */
|
|
|
|
static void atp_complete_geyser_3_4(struct urb *urb)
|
|
{
|
|
int x, y, x_z, y_z, x_f, y_f;
|
|
int retval, i, j;
|
|
int key;
|
|
struct atp *dev = urb->context;
|
|
int status = atp_status_check(urb);
|
|
|
|
if (status == ATP_URB_STATUS_ERROR_FATAL)
|
|
return;
|
|
else if (status == ATP_URB_STATUS_ERROR)
|
|
goto exit;
|
|
|
|
/* Reorder the sensors values:
|
|
*
|
|
* The values are laid out like this:
|
|
* -, Y1, Y2, -, Y3, Y4, -, ..., -, X1, X2, -, X3, X4, ...
|
|
* '-' is an unused value.
|
|
*/
|
|
|
|
/* read X values */
|
|
for (i = 0, j = 19; i < 20; i += 2, j += 3) {
|
|
dev->xy_cur[i] = dev->data[j + 1];
|
|
dev->xy_cur[i + 1] = dev->data[j + 2];
|
|
}
|
|
/* read Y values */
|
|
for (i = 0, j = 1; i < 9; i += 2, j += 3) {
|
|
dev->xy_cur[ATP_XSENSORS + i] = dev->data[j + 1];
|
|
dev->xy_cur[ATP_XSENSORS + i + 1] = dev->data[j + 2];
|
|
}
|
|
|
|
dbg_dump("sample", dev->xy_cur);
|
|
|
|
/* Just update the base values (i.e. touchpad in untouched state) */
|
|
if (dev->data[dev->info->datalen - 1] & ATP_STATUS_BASE_UPDATE) {
|
|
|
|
dprintk(KERN_DEBUG "appletouch: updated base values\n");
|
|
|
|
memcpy(dev->xy_old, dev->xy_cur, sizeof(dev->xy_old));
|
|
goto exit;
|
|
}
|
|
|
|
for (i = 0; i < ATP_XSENSORS + ATP_YSENSORS; i++) {
|
|
/* calculate the change */
|
|
dev->xy_acc[i] = dev->xy_cur[i] - dev->xy_old[i];
|
|
|
|
/* this is a round-robin value, so couple with that */
|
|
if (dev->xy_acc[i] > 127)
|
|
dev->xy_acc[i] -= 256;
|
|
|
|
if (dev->xy_acc[i] < -127)
|
|
dev->xy_acc[i] += 256;
|
|
|
|
/* prevent down drifting */
|
|
if (dev->xy_acc[i] < 0)
|
|
dev->xy_acc[i] = 0;
|
|
}
|
|
|
|
dbg_dump("accumulator", dev->xy_acc);
|
|
|
|
x = atp_calculate_abs(dev->xy_acc, ATP_XSENSORS,
|
|
dev->info->xfact, &x_z, &x_f);
|
|
y = atp_calculate_abs(dev->xy_acc + ATP_XSENSORS, ATP_YSENSORS,
|
|
dev->info->yfact, &y_z, &y_f);
|
|
key = dev->data[dev->info->datalen - 1] & ATP_STATUS_BUTTON;
|
|
|
|
if (x && y) {
|
|
if (dev->x_old != -1) {
|
|
x = (dev->x_old * 3 + x) >> 2;
|
|
y = (dev->y_old * 3 + y) >> 2;
|
|
dev->x_old = x;
|
|
dev->y_old = y;
|
|
|
|
if (debug > 1)
|
|
printk(KERN_DEBUG "appletouch: X: %3d Y: %3d "
|
|
"Xz: %3d Yz: %3d\n",
|
|
x, y, x_z, y_z);
|
|
|
|
input_report_key(dev->input, BTN_TOUCH, 1);
|
|
input_report_abs(dev->input, ABS_X, x);
|
|
input_report_abs(dev->input, ABS_Y, y);
|
|
input_report_abs(dev->input, ABS_PRESSURE,
|
|
min(ATP_PRESSURE, x_z + y_z));
|
|
atp_report_fingers(dev->input, max(x_f, y_f));
|
|
}
|
|
dev->x_old = x;
|
|
dev->y_old = y;
|
|
|
|
} else if (!x && !y) {
|
|
|
|
dev->x_old = dev->y_old = -1;
|
|
input_report_key(dev->input, BTN_TOUCH, 0);
|
|
input_report_abs(dev->input, ABS_PRESSURE, 0);
|
|
atp_report_fingers(dev->input, 0);
|
|
|
|
/* reset the accumulator on release */
|
|
memset(dev->xy_acc, 0, sizeof(dev->xy_acc));
|
|
}
|
|
|
|
input_report_key(dev->input, BTN_LEFT, key);
|
|
input_sync(dev->input);
|
|
|
|
/*
|
|
* Geysers 3/4 will continue to send packets continually after
|
|
* the first touch unless reinitialised. Do so if it's been
|
|
* idle for a while in order to avoid waking the kernel up
|
|
* several hundred times a second.
|
|
*/
|
|
|
|
/*
|
|
* Button must not be pressed when entering suspend,
|
|
* otherwise we will never release the button.
|
|
*/
|
|
if (!x && !y && !key) {
|
|
dev->idlecount++;
|
|
if (dev->idlecount == 10) {
|
|
dev->x_old = dev->y_old = -1;
|
|
dev->idlecount = 0;
|
|
schedule_work(&dev->work);
|
|
/* Don't resubmit urb here, wait for reinit */
|
|
return;
|
|
}
|
|
} else
|
|
dev->idlecount = 0;
|
|
|
|
exit:
|
|
retval = usb_submit_urb(dev->urb, GFP_ATOMIC);
|
|
if (retval)
|
|
err("atp_complete: usb_submit_urb failed with result %d",
|
|
retval);
|
|
}
|
|
|
|
static int atp_open(struct input_dev *input)
|
|
{
|
|
struct atp *dev = input_get_drvdata(input);
|
|
|
|
if (usb_submit_urb(dev->urb, GFP_ATOMIC))
|
|
return -EIO;
|
|
|
|
dev->open = 1;
|
|
return 0;
|
|
}
|
|
|
|
static void atp_close(struct input_dev *input)
|
|
{
|
|
struct atp *dev = input_get_drvdata(input);
|
|
|
|
usb_kill_urb(dev->urb);
|
|
cancel_work_sync(&dev->work);
|
|
dev->open = 0;
|
|
}
|
|
|
|
static int atp_handle_geyser(struct atp *dev)
|
|
{
|
|
struct usb_device *udev = dev->udev;
|
|
|
|
if (dev->info != &fountain_info) {
|
|
/* switch to raw sensor mode */
|
|
if (atp_geyser_init(udev))
|
|
return -EIO;
|
|
|
|
printk(KERN_INFO "appletouch: Geyser mode initialized.\n");
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int atp_probe(struct usb_interface *iface,
|
|
const struct usb_device_id *id)
|
|
{
|
|
struct atp *dev;
|
|
struct input_dev *input_dev;
|
|
struct usb_device *udev = interface_to_usbdev(iface);
|
|
struct usb_host_interface *iface_desc;
|
|
struct usb_endpoint_descriptor *endpoint;
|
|
int int_in_endpointAddr = 0;
|
|
int i, error = -ENOMEM;
|
|
const struct atp_info *info = (const struct atp_info *)id->driver_info;
|
|
|
|
/* set up the endpoint information */
|
|
/* use only the first interrupt-in endpoint */
|
|
iface_desc = iface->cur_altsetting;
|
|
for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
|
|
endpoint = &iface_desc->endpoint[i].desc;
|
|
if (!int_in_endpointAddr && usb_endpoint_is_int_in(endpoint)) {
|
|
/* we found an interrupt in endpoint */
|
|
int_in_endpointAddr = endpoint->bEndpointAddress;
|
|
break;
|
|
}
|
|
}
|
|
if (!int_in_endpointAddr) {
|
|
err("Could not find int-in endpoint");
|
|
return -EIO;
|
|
}
|
|
|
|
/* allocate memory for our device state and initialize it */
|
|
dev = kzalloc(sizeof(struct atp), GFP_KERNEL);
|
|
input_dev = input_allocate_device();
|
|
if (!dev || !input_dev) {
|
|
err("Out of memory");
|
|
goto err_free_devs;
|
|
}
|
|
|
|
dev->udev = udev;
|
|
dev->input = input_dev;
|
|
dev->info = info;
|
|
dev->overflow_warned = false;
|
|
|
|
dev->urb = usb_alloc_urb(0, GFP_KERNEL);
|
|
if (!dev->urb)
|
|
goto err_free_devs;
|
|
|
|
dev->data = usb_buffer_alloc(dev->udev, dev->info->datalen, GFP_KERNEL,
|
|
&dev->urb->transfer_dma);
|
|
if (!dev->data)
|
|
goto err_free_urb;
|
|
|
|
usb_fill_int_urb(dev->urb, udev,
|
|
usb_rcvintpipe(udev, int_in_endpointAddr),
|
|
dev->data, dev->info->datalen,
|
|
dev->info->callback, dev, 1);
|
|
|
|
error = atp_handle_geyser(dev);
|
|
if (error)
|
|
goto err_free_buffer;
|
|
|
|
usb_make_path(udev, dev->phys, sizeof(dev->phys));
|
|
strlcat(dev->phys, "/input0", sizeof(dev->phys));
|
|
|
|
input_dev->name = "appletouch";
|
|
input_dev->phys = dev->phys;
|
|
usb_to_input_id(dev->udev, &input_dev->id);
|
|
input_dev->dev.parent = &iface->dev;
|
|
|
|
input_set_drvdata(input_dev, dev);
|
|
|
|
input_dev->open = atp_open;
|
|
input_dev->close = atp_close;
|
|
|
|
set_bit(EV_ABS, input_dev->evbit);
|
|
|
|
input_set_abs_params(input_dev, ABS_X, 0,
|
|
(dev->info->xsensors - 1) * dev->info->xfact - 1,
|
|
ATP_FUZZ, 0);
|
|
input_set_abs_params(input_dev, ABS_Y, 0,
|
|
(dev->info->ysensors - 1) * dev->info->yfact - 1,
|
|
ATP_FUZZ, 0);
|
|
input_set_abs_params(input_dev, ABS_PRESSURE, 0, ATP_PRESSURE, 0, 0);
|
|
|
|
set_bit(EV_KEY, input_dev->evbit);
|
|
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);
|
|
|
|
error = input_register_device(dev->input);
|
|
if (error)
|
|
goto err_free_buffer;
|
|
|
|
/* save our data pointer in this interface device */
|
|
usb_set_intfdata(iface, dev);
|
|
|
|
INIT_WORK(&dev->work, atp_reinit);
|
|
|
|
return 0;
|
|
|
|
err_free_buffer:
|
|
usb_buffer_free(dev->udev, dev->info->datalen,
|
|
dev->data, dev->urb->transfer_dma);
|
|
err_free_urb:
|
|
usb_free_urb(dev->urb);
|
|
err_free_devs:
|
|
usb_set_intfdata(iface, NULL);
|
|
kfree(dev);
|
|
input_free_device(input_dev);
|
|
return error;
|
|
}
|
|
|
|
static void atp_disconnect(struct usb_interface *iface)
|
|
{
|
|
struct atp *dev = usb_get_intfdata(iface);
|
|
|
|
usb_set_intfdata(iface, NULL);
|
|
if (dev) {
|
|
usb_kill_urb(dev->urb);
|
|
input_unregister_device(dev->input);
|
|
usb_buffer_free(dev->udev, dev->info->datalen,
|
|
dev->data, dev->urb->transfer_dma);
|
|
usb_free_urb(dev->urb);
|
|
kfree(dev);
|
|
}
|
|
printk(KERN_INFO "input: appletouch disconnected\n");
|
|
}
|
|
|
|
static int atp_recover(struct atp *dev)
|
|
{
|
|
int error;
|
|
|
|
error = atp_handle_geyser(dev);
|
|
if (error)
|
|
return error;
|
|
|
|
if (dev->open && usb_submit_urb(dev->urb, GFP_ATOMIC))
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int atp_suspend(struct usb_interface *iface, pm_message_t message)
|
|
{
|
|
struct atp *dev = usb_get_intfdata(iface);
|
|
|
|
usb_kill_urb(dev->urb);
|
|
return 0;
|
|
}
|
|
|
|
static int atp_resume(struct usb_interface *iface)
|
|
{
|
|
struct atp *dev = usb_get_intfdata(iface);
|
|
|
|
if (dev->open && usb_submit_urb(dev->urb, GFP_ATOMIC))
|
|
return -EIO;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int atp_reset_resume(struct usb_interface *iface)
|
|
{
|
|
struct atp *dev = usb_get_intfdata(iface);
|
|
|
|
return atp_recover(dev);
|
|
}
|
|
|
|
static struct usb_driver atp_driver = {
|
|
.name = "appletouch",
|
|
.probe = atp_probe,
|
|
.disconnect = atp_disconnect,
|
|
.suspend = atp_suspend,
|
|
.resume = atp_resume,
|
|
.reset_resume = atp_reset_resume,
|
|
.id_table = atp_table,
|
|
};
|
|
|
|
static int __init atp_init(void)
|
|
{
|
|
return usb_register(&atp_driver);
|
|
}
|
|
|
|
static void __exit atp_exit(void)
|
|
{
|
|
usb_deregister(&atp_driver);
|
|
}
|
|
|
|
module_init(atp_init);
|
|
module_exit(atp_exit);
|