548 lines
14 KiB
C
548 lines
14 KiB
C
/*
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* Apple USB Touchpad (for post-February 2005 PowerBooks) 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 Johannes Berg (johannes@sipsolutions.net)
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* Copyright (C) 2005 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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*
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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/config.h>
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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.h>
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#include <linux/input.h>
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#include <linux/usb_input.h>
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/* Apple has powerbooks which have the keyboard with different Product IDs */
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#define APPLE_VENDOR_ID 0x05AC
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/* These names come from Info.plist in AppleUSBTrackpad.kext */
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#define GEYSER_ANSI_PRODUCT_ID 0x0214
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#define GEYSER_ISO_PRODUCT_ID 0x0215
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#define GEYSER_JIS_PRODUCT_ID 0x0216
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#define ATP_DEVICE(prod) \
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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 = APPLE_VENDOR_ID, \
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.idProduct = (prod), \
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.bInterfaceClass = 0x03, \
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.bInterfaceProtocol = 0x02
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/* table of devices that work with this driver */
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static struct usb_device_id atp_table [] = {
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{ ATP_DEVICE(0x020E) },
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{ ATP_DEVICE(0x020F) },
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{ ATP_DEVICE(0x030A) },
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{ ATP_DEVICE(0x030B) },
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/* PowerBooks Oct 2005 */
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{ ATP_DEVICE(GEYSER_ANSI_PRODUCT_ID) },
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{ ATP_DEVICE(GEYSER_ISO_PRODUCT_ID) },
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{ ATP_DEVICE(GEYSER_JIS_PRODUCT_ID) },
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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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/*
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* number of sensors. Note that only 16 instead of 26 X (horizontal)
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* sensors exist on 12" and 15" PowerBooks. All models have 16 Y
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* (vertical) sensors.
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*/
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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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* multiplication factor for the X and Y coordinates.
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* We try to keep the touchpad aspect ratio while still doing only simple
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* arithmetics.
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* The factors below give coordinates like:
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* 0 <= x < 960 on 12" and 15" Powerbooks
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* 0 <= x < 1600 on 17" Powerbooks
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* 0 <= y < 646
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*/
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#define ATP_XFACT 64
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#define ATP_YFACT 43
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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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/* 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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signed char * data; /* transferred data */
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int open; /* non-zero if opened */
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struct input_dev *input; /* input dev */
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int valid; /* are the sensors valid ? */
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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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/* current value of the sensors */
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signed char xy_cur[ATP_XSENSORS + ATP_YSENSORS];
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/* last value of the sensors */
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signed char xy_old[ATP_XSENSORS + ATP_YSENSORS];
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/* accumulated sensors */
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int xy_acc[ATP_XSENSORS + ATP_YSENSORS];
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int overflowwarn; /* overflow warning printed? */
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int datalen; /* size of an USB urb transfer */
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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("appletouch: %s %lld", msg, (long long)jiffies); \
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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) printk(format, ##a); \
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} while (0)
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MODULE_AUTHOR("Johannes Berg, Stelian Pop, Frank Arnold, Michael Hanselmann");
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MODULE_DESCRIPTION("Apple PowerBooks USB touchpad driver");
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MODULE_LICENSE("GPL");
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static int debug = 1;
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module_param(debug, int, 0644);
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MODULE_PARM_DESC(debug, "Activate debugging output");
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/* Checks if the device a Geyser 2 (ANSI, ISO, JIS) */
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static inline int atp_is_geyser_2(struct atp *dev)
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{
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int16_t productId = le16_to_cpu(dev->udev->descriptor.idProduct);
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return (productId == GEYSER_ANSI_PRODUCT_ID) ||
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(productId == GEYSER_ISO_PRODUCT_ID) ||
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(productId == GEYSER_JIS_PRODUCT_ID);
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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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*fingers = 0;
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for (i = 0; i < nb_sensors; i++) {
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if (xy_sensors[i] < ATP_THRESHOLD)
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continue;
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if ((i - 1 < 0) || (xy_sensors[i - 1] < ATP_THRESHOLD))
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(*fingers)++;
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pcum += xy_sensors[i] * i;
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psum += xy_sensors[i];
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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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static void atp_complete(struct urb* urb, struct pt_regs* regs)
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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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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->overflowwarn) {
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printk("appletouch: OVERFLOW with data "
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"length %d, actual length is %d\n",
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dev->datalen, dev->urb->actual_length);
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dev->overflowwarn = 1;
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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("%s - urb shutting down with status: %d",
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__FUNCTION__, urb->status);
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return;
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default:
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dbg("%s - nonzero urb status received: %d",
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__FUNCTION__, urb->status);
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goto exit;
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}
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/* drop incomplete datasets */
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if (dev->urb->actual_length != dev->datalen) {
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dprintk("appletouch: incomplete data package.\n");
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goto exit;
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}
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/* reorder the sensors values */
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if (atp_is_geyser_2(dev)) {
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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];
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}
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/* read Y values */
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for (i = 0, j = 1; i < 9; i += 2, j += 3) {
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dev->xy_cur[ATP_XSENSORS + i] = dev->data[j];
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dev->xy_cur[ATP_XSENSORS + i + 1] = dev->data[j + 1];
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}
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} else {
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for (i = 0; i < 8; i++) {
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/* X values */
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dev->xy_cur[i ] = dev->data[5 * i + 2];
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dev->xy_cur[i + 8] = dev->data[5 * i + 4];
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dev->xy_cur[i + 16] = dev->data[5 * i + 42];
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if (i < 2)
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dev->xy_cur[i + 24] = dev->data[5 * i + 44];
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/* Y values */
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dev->xy_cur[i + 26] = dev->data[5 * i + 1];
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dev->xy_cur[i + 34] = dev->data[5 * i + 3];
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}
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}
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dbg_dump("sample", dev->xy_cur);
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if (!dev->valid) {
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/* first sample */
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dev->valid = 1;
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dev->x_old = dev->y_old = -1;
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memcpy(dev->xy_old, dev->xy_cur, sizeof(dev->xy_old));
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/* 17" Powerbooks have extra X sensors */
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for (i = (atp_is_geyser_2(dev)?15:16); i < ATP_XSENSORS; i++) {
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if (!dev->xy_cur[i]) continue;
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printk("appletouch: 17\" model detected.\n");
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if(atp_is_geyser_2(dev))
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input_set_abs_params(dev->input, ABS_X, 0,
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(20 - 1) *
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ATP_XFACT - 1,
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ATP_FUZZ, 0);
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else
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input_set_abs_params(dev->input, ABS_X, 0,
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(ATP_XSENSORS - 1) *
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ATP_XFACT - 1,
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ATP_FUZZ, 0);
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break;
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}
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goto exit;
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}
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for (i = 0; i < ATP_XSENSORS + ATP_YSENSORS; i++) {
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/* accumulate the change */
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signed char change = dev->xy_old[i] - dev->xy_cur[i];
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dev->xy_acc[i] -= change;
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/* prevent down drifting */
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if (dev->xy_acc[i] < 0)
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dev->xy_acc[i] = 0;
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}
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memcpy(dev->xy_old, dev->xy_cur, sizeof(dev->xy_old));
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dbg_dump("accumulator", dev->xy_acc);
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x = atp_calculate_abs(dev->xy_acc, ATP_XSENSORS,
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ATP_XFACT, &x_z, &x_f);
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y = atp_calculate_abs(dev->xy_acc + ATP_XSENSORS, ATP_YSENSORS,
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ATP_YFACT, &y_z, &y_f);
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if (x && y) {
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if (dev->x_old != -1) {
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x = (dev->x_old * 3 + x) >> 2;
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y = (dev->y_old * 3 + y) >> 2;
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dev->x_old = x;
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dev->y_old = y;
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if (debug > 1)
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printk("appletouch: X: %3d Y: %3d "
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"Xz: %3d Yz: %3d\n",
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x, y, x_z, y_z);
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input_report_key(dev->input, BTN_TOUCH, 1);
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input_report_abs(dev->input, ABS_X, x);
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input_report_abs(dev->input, ABS_Y, y);
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input_report_abs(dev->input, ABS_PRESSURE,
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min(ATP_PRESSURE, x_z + y_z));
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atp_report_fingers(dev->input, max(x_f, y_f));
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}
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dev->x_old = x;
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dev->y_old = y;
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}
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else if (!x && !y) {
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dev->x_old = dev->y_old = -1;
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input_report_key(dev->input, BTN_TOUCH, 0);
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input_report_abs(dev->input, ABS_PRESSURE, 0);
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atp_report_fingers(dev->input, 0);
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/* reset the accumulator on release */
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memset(dev->xy_acc, 0, sizeof(dev->xy_acc));
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}
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input_report_key(dev->input, BTN_LEFT,
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!!dev->data[dev->datalen - 1]);
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input_sync(dev->input);
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exit:
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retval = usb_submit_urb(dev->urb, GFP_ATOMIC);
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if (retval) {
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err("%s - usb_submit_urb failed with result %d",
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__FUNCTION__, retval);
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}
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}
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static int atp_open(struct input_dev *input)
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{
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struct atp *dev = input->private;
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if (usb_submit_urb(dev->urb, GFP_ATOMIC))
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return -EIO;
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dev->open = 1;
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return 0;
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}
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static void atp_close(struct input_dev *input)
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{
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struct atp *dev = input->private;
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usb_kill_urb(dev->urb);
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dev->open = 0;
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}
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static int atp_probe(struct usb_interface *iface, const struct usb_device_id *id)
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{
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struct atp *dev;
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struct input_dev *input_dev;
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struct usb_device *udev = interface_to_usbdev(iface);
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struct usb_host_interface *iface_desc;
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struct usb_endpoint_descriptor *endpoint;
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int int_in_endpointAddr = 0;
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int i, retval = -ENOMEM;
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/* set up the endpoint information */
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/* use only the first interrupt-in endpoint */
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iface_desc = iface->cur_altsetting;
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for (i = 0; i < iface_desc->desc.bNumEndpoints; i++) {
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endpoint = &iface_desc->endpoint[i].desc;
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if (!int_in_endpointAddr &&
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(endpoint->bEndpointAddress & USB_DIR_IN) &&
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((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
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== USB_ENDPOINT_XFER_INT)) {
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/* we found an interrupt in endpoint */
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int_in_endpointAddr = endpoint->bEndpointAddress;
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break;
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}
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}
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if (!int_in_endpointAddr) {
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err("Could not find int-in endpoint");
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return -EIO;
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}
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/* allocate memory for our device state and initialize it */
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dev = kzalloc(sizeof(struct atp), GFP_KERNEL);
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input_dev = input_allocate_device();
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if (!dev || !input_dev) {
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err("Out of memory");
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goto err_free_devs;
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}
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dev->udev = udev;
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dev->input = input_dev;
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dev->overflowwarn = 0;
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dev->datalen = (atp_is_geyser_2(dev)?64:81);
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dev->urb = usb_alloc_urb(0, GFP_KERNEL);
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if (!dev->urb) {
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retval = -ENOMEM;
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goto err_free_devs;
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}
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dev->data = usb_buffer_alloc(dev->udev, dev->datalen, GFP_KERNEL,
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&dev->urb->transfer_dma);
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if (!dev->data) {
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retval = -ENOMEM;
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goto err_free_urb;
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}
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usb_fill_int_urb(dev->urb, udev,
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usb_rcvintpipe(udev, int_in_endpointAddr),
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dev->data, dev->datalen, atp_complete, dev, 1);
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usb_make_path(udev, dev->phys, sizeof(dev->phys));
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strlcat(dev->phys, "/input0", sizeof(dev->phys));
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input_dev->name = "appletouch";
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input_dev->phys = dev->phys;
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usb_to_input_id(dev->udev, &input_dev->id);
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input_dev->cdev.dev = &iface->dev;
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input_dev->private = dev;
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input_dev->open = atp_open;
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input_dev->close = atp_close;
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set_bit(EV_ABS, input_dev->evbit);
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if (atp_is_geyser_2(dev)) {
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/*
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* Oct 2005 15" PowerBooks have 15 X sensors, 17" are detected
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* later.
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*/
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input_set_abs_params(input_dev, ABS_X, 0,
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((15 - 1) * ATP_XFACT) - 1, ATP_FUZZ, 0);
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input_set_abs_params(input_dev, ABS_Y, 0,
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((9 - 1) * ATP_YFACT) - 1, ATP_FUZZ, 0);
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} else {
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/*
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* 12" and 15" Powerbooks only have 16 x sensors,
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* 17" models are detected later.
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*/
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input_set_abs_params(input_dev, ABS_X, 0,
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(16 - 1) * ATP_XFACT - 1, ATP_FUZZ, 0);
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input_set_abs_params(input_dev, ABS_Y, 0,
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(ATP_YSENSORS - 1) * ATP_YFACT - 1, ATP_FUZZ, 0);
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}
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input_set_abs_params(input_dev, ABS_PRESSURE, 0, ATP_PRESSURE, 0, 0);
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set_bit(EV_KEY, input_dev->evbit);
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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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set_bit(BTN_LEFT, input_dev->keybit);
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input_register_device(dev->input);
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/* save our data pointer in this interface device */
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usb_set_intfdata(iface, dev);
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return 0;
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err_free_urb:
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usb_free_urb(dev->urb);
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err_free_devs:
|
|
usb_set_intfdata(iface, NULL);
|
|
kfree(dev);
|
|
input_free_device(input_dev);
|
|
return retval;
|
|
}
|
|
|
|
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_free_urb(dev->urb);
|
|
usb_buffer_free(dev->udev, dev->datalen,
|
|
dev->data, dev->urb->transfer_dma);
|
|
kfree(dev);
|
|
}
|
|
printk(KERN_INFO "input: appletouch disconnected\n");
|
|
}
|
|
|
|
static int atp_suspend(struct usb_interface *iface, pm_message_t message)
|
|
{
|
|
struct atp *dev = usb_get_intfdata(iface);
|
|
usb_kill_urb(dev->urb);
|
|
dev->valid = 0;
|
|
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 struct usb_driver atp_driver = {
|
|
.name = "appletouch",
|
|
.probe = atp_probe,
|
|
.disconnect = atp_disconnect,
|
|
.suspend = atp_suspend,
|
|
.resume = atp_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);
|