/*
* Apple USB Touchpad (for post-February 2005 PowerBooks and MacBooks) driver
*
* Copyright (C) 2001-2004 Greg Kroah-Hartman (greg@kroah.com)
* Copyright (C) 2005-2008 Johannes Berg (johannes@sipsolutions.net)
* Copyright (C) 2005 Stelian Pop (stelian@popies.net)
* Copyright (C) 2005 Frank Arnold (frank@scirocco-5v-turbo.de)
* Copyright (C) 2005 Peter Osterlund (petero2@telia.com)
* Copyright (C) 2005 Michael Hanselmann (linux-kernel@hansmi.ch)
* Copyright (C) 2006 Nicolas Boichat (nicolas@boichat.ch)
* Copyright (C) 2007-2008 Sven Anders (anders@anduras.de)
*
* Thanks to Alex Harper <basilisk@foobox.net> for his inputs.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/usb/input.h>
/* Type of touchpad */
enum atp_touchpad_type {
ATP_FOUNTAIN,
ATP_GEYSER1,
ATP_GEYSER2,
ATP_GEYSER3,
ATP_GEYSER4
};
#define ATP_DEVICE(prod, type) \
{ \
.match_flags = USB_DEVICE_ID_MATCH_DEVICE | \
USB_DEVICE_ID_MATCH_INT_CLASS | \
USB_DEVICE_ID_MATCH_INT_PROTOCOL, \
.idVendor = 0x05ac, /* Apple */ \
.idProduct = (prod), \
.bInterfaceClass = 0x03, \
.bInterfaceProtocol = 0x02, \
.driver_info = ATP_ ## type, \
}
/*
* 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 struct usb_device_id atp_table [] = {
/* PowerBooks Feb 2005, iBooks G4 */
ATP_DEVICE(0x020e, FOUNTAIN), /* FOUNTAIN ANSI */
ATP_DEVICE(0x020f, FOUNTAIN), /* FOUNTAIN ISO */
ATP_DEVICE(0x030a, FOUNTAIN), /* FOUNTAIN TP ONLY */
ATP_DEVICE(0x030b, GEYSER1), /* GEYSER 1 TP ONLY */
/* PowerBooks Oct 2005 */
ATP_DEVICE(0x0214, GEYSER2), /* GEYSER 2 ANSI */
ATP_DEVICE(0x0215, GEYSER2), /* GEYSER 2 ISO */
ATP_DEVICE(0x0216, GEYSER2), /* GEYSER 2 JIS */
/* Core Duo MacBook & MacBook Pro */
ATP_DEVICE(0x0217, GEYSER3), /* GEYSER 3 ANSI */
ATP_DEVICE(0x0218, GEYSER3), /* GEYSER 3 ISO */
ATP_DEVICE(0x0219, GEYSER3), /* GEYSER 3 JIS */
/* Core2 Duo MacBook & MacBook Pro */
ATP_DEVICE(0x021a, GEYSER4), /* GEYSER 4 ANSI */
ATP_DEVICE(0x021b, GEYSER4), /* GEYSER 4 ISO */
ATP_DEVICE(0x021c, GEYSER4), /* GEYSER 4 JIS */
/* Core2 Duo MacBook3,1 */
ATP_DEVICE(0x0229, GEYSER4), /* GEYSER 4 HF ANSI */
ATP_DEVICE(0x022a, GEYSER4), /* GEYSER 4 HF ISO */
ATP_DEVICE(0x022b, GEYSER4), /* GEYSER 4 HF JIS */
/* Terminating entry */
{ }
};
MODULE_DEVICE_TABLE(usb, atp_table);
/*
* number of sensors. Note that only 16 instead of 26 X (horizontal)
* sensors exist on 12" and 15" PowerBooks. All models have 16 Y
* (vertical) sensors.
*/
#define ATP_XSENSORS 26
#define ATP_YSENSORS 16
/* amount of fuzz this touchpad generates */
#define ATP_FUZZ 16
/* maximum pressure this driver will report */
#define ATP_PRESSURE 300
/*
* multiplication factor for the X and Y coordinates.
* We try to keep the touchpad aspect ratio while still doing only simple
* arithmetics.
* The factors below give coordinates like:
*
* 0 <= x < 960 on 12" and 15" Powerbooks
* 0 <= x < 1600 on 17" Powerbooks and 17" MacBook Pro
* 0 <= x < 1216 on MacBooks and 15" MacBook Pro
*
* 0 <= y < 646 on all Powerbooks
* 0 <= y < 774 on all MacBooks
*/
#define ATP_XFACT 64
#define ATP_YFACT 43
/*
* Threshold for the touchpad sensors. Any change less than ATP_THRESHOLD is
* ignored.
*/
#define ATP_THRESHOLD 5
/* Geyser initialization constants */
#define ATP_GEYSER_MODE_READ_REQUEST_ID 1
#define ATP_GEYSER_MODE_WRITE_REQUEST_ID 9
#define ATP_GEYSER_MODE_REQUEST_VALUE 0x300
#define ATP_GEYSER_MODE_REQUEST_INDEX 0
#define ATP_GEYSER_MODE_VENDOR_VALUE 0x04
/* Structure to hold all of our device specific stuff */
struct atp {
char phys[64];
struct usb_device *udev; /* usb device */
struct urb *urb; /* usb request block */
signed char *data; /* transferred data */
struct input_dev *input; /* input dev */
enum atp_touchpad_type type; /* type of touchpad */
bool open;
bool valid; /* are the samples valid? */
bool size_detect_done;
bool overflow_warned;
int x_old; /* last reported x/y, */
int y_old; /* used for smoothing */
signed char xy_cur[ATP_XSENSORS + ATP_YSENSORS];
signed char xy_old[ATP_XSENSORS + ATP_YSENSORS];
int xy_acc[ATP_XSENSORS + ATP_YSENSORS];
int datalen; /* size of USB transfer */
int idlecount; /* number of empty packets */
struct work_struct work;
};
#define dbg_dump(msg, tab) \
if (debug > 1) { \
int __i; \
printk(KERN_DEBUG "appletouch: %s", msg); \
for (__i = 0; __i < ATP_XSENSORS + ATP_YSENSORS; __i++) \
printk(" %02x", tab[__i]); \
printk("\n"); \
}
#define dprintk(format, a...) \
do { \
if (debug) \
printk(KERN_DEBUG format, ##a); \
} while (0)
MODULE_AUTHOR("Johannes Berg");
MODULE_AUTHOR("Stelian Pop");
MODULE_AUTHOR("Frank Arnold");
MODULE_AUTHOR("Michael Hanselmann");
MODULE_AUTHOR("Sven Anders");
MODULE_DESCRIPTION("Apple PowerBook and MacBook USB touchpad driver");
MODULE_LICENSE("GPL");
/*
* Make the threshold a module parameter
*/
static int threshold = ATP_THRESHOLD;
module_param(threshold, int, 0644);
MODULE_PARM_DESC(threshold, "Discard any change in data from a sensor"
" (the trackpad has many of these sensors)"
" less than this value.");
static int debug;
module_param(debug, int, 0644);
MODULE_PARM_DESC(debug, "Activate debugging output");
/*
* 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 usb_device *udev)
{
char data[8];
int size;
int i;
size = usb_control_msg(udev, usb_rcvctrlpipe(udev, 0),
ATP_GEYSER_MODE_READ_REQUEST_ID,
USB_DIR_IN | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
ATP_GEYSER_MODE_REQUEST_VALUE,
ATP_GEYSER_MODE_REQUEST_INDEX, &data, 8, 5000);
if (size != 8) {
dprintk("atp_geyser_init: read error\n");
for (i = 0; i < 8; i++)
dprintk("appletouch[%d]: %d\n", i, data[i]);
err("Failed to read mode from device.");
return -EIO;
}
/* Apply the mode switch */
data[0] = ATP_GEYSER_MODE_VENDOR_VALUE;
size = usb_control_msg(udev, usb_sndctrlpipe(udev, 0),
ATP_GEYSER_MODE_WRITE_REQUEST_ID,
USB_DIR_OUT | USB_TYPE_CLASS | USB_RECIP_INTERFACE,
ATP_GEYSER_MODE_REQUEST_VALUE,
ATP_GEYSER_MODE_REQUEST_INDEX, &data, 8, 5000);
if (size != 8) {
dprintk("atp_geyser_init: write error\n");
for (i = 0; i < 8; i++)
dprintk("appletouch[%d]: %d\n", i, data[i]);
err("Failed to request geyser raw mode");
return -EIO;
}
return 0;
}
/*
* Reinitialise the device. This usually stops stream of empty packets
* coming from it.
*/
static void atp_reinit(struct work_struct *work)
{
struct atp *dev = container_of(work, struct atp, work);
struct usb_device *udev = dev->udev;
int retval;
dprintk("appletouch: putting appletouch to sleep (reinit)\n");
dev->idlecount = 0;
atp_geyser_init(udev);
retval = usb_submit_urb(dev->urb, GFP_ATOMIC);
if (retval)
err("atp_reinit: usb_submit_urb failed with error %d",
retval);
}
static int atp_calculate_abs(int *xy_sensors, int nb_sensors, int fact,
int *z, int *fingers)
{
int i;
/* values to calculate mean */
int pcum = 0, psum = 0;
int is_increasing = 0;
*fingers = 0;
for (i = 0; i < nb_sensors; i++) {
if (xy_sensors[i] < threshold) {
if (is_increasing)
is_increasing = 0;
continue;
}
/*
* Makes the finger detection more versatile. For example,
* two fingers with no gap will be detected. Also, my
* tests show it less likely to have intermittent loss
* of multiple finger readings while moving around (scrolling).
*
* Changes the multiple finger detection to counting humps on
* sensors (transitions from nonincreasing to increasing)
* instead of counting transitions from low sensors (no
* finger reading) to high sensors (finger above
* sensor)
*
* - Jason Parekh <jasonparekh@gmail.com>
*/
if (i < 1 ||
(!is_increasing && xy_sensors[i - 1] < xy_sensors[i])) {
(*fingers)++;
is_increasing = 1;
} else if (i > 0 && xy_sensors[i - 1] >= xy_sensors[i]) {
is_increasing = 0;
}
/*
* Subtracts threshold so a high sensor that just passes the
* threshold won't skew the calculated absolute coordinate.
* Fixes an issue where slowly moving the mouse would
* occasionally jump a number of pixels (slowly moving the
* finger makes this issue most apparent.)
*/
pcum += (xy_sensors[i] - threshold) * i;
psum += (xy_sensors[i] - threshold);
}
if (psum > 0) {
*z = psum;
return pcum * fact / psum;
}
return 0;
}
static inline void atp_report_fingers(struct input_dev *input, int fingers)
{
input_report_key(input, BTN_TOOL_FINGER, fingers == 1);
input_report_key(input, BTN_TOOL_DOUBLETAP, fingers == 2);
input_report_key(input, BTN_TOOL_TRIPLETAP, fingers > 2);
}
static void atp_complete(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;
switch (urb->status) {
case 0:
/* success */
break;
case -EOVERFLOW:
if (!dev->overflow_warned) {
printk(KERN_WARNING "appletouch: OVERFLOW with data "
"length %d, actual length is %d\n",
dev->datalen, dev->urb->actual_length);
dev->overflow_warned = true;
}
case -ECONNRESET:
case -ENOENT:
case -ESHUTDOWN:
/* This urb is terminated, clean up */
dbg("atp_complete: urb shutting down with status: %d",
urb->status);
return;
default:
dbg("atp_complete: nonzero urb status received: %d",
urb->status);
goto exit;
}
/* drop incomplete datasets */
if (dev->urb->actual_length != dev->datalen) {
dprintk("appletouch: incomplete data package"
" (first byte: %d, length: %d).\n",
dev->data[0], dev->urb->actual_length);
goto exit;
}
/* reorder the sensors values */
if (dev->type == ATP_GEYSER3 || dev->type == ATP_GEYSER4) {
memset(dev->xy_cur, 0, sizeof(dev->xy_cur));
/*
* 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];
}
} else if (dev->type == ATP_GEYSER2) {
memset(dev->xy_cur, 0, sizeof(dev->xy_cur));
/*
* 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];
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[i + 26] = dev->data[5 * i + 1];
dev->xy_cur[i + 34] = 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;
memcpy(dev->xy_old, dev->xy_cur, sizeof(dev->xy_old));
if (dev->size_detect_done ||
dev->type == ATP_GEYSER3) /* No 17" Macbooks (yet) */
goto exit;
/* 17" Powerbooks have extra X sensors */
for (i = (dev->type == ATP_GEYSER2 ? 15 : 16);
i < ATP_XSENSORS; i++) {
if (!dev->xy_cur[i])
continue;
printk(KERN_INFO "appletouch: 17\" model detected.\n");
if (dev->type == ATP_GEYSER2)
input_set_abs_params(dev->input, ABS_X, 0,
(20 - 1) *
ATP_XFACT - 1,
ATP_FUZZ, 0);
else
input_set_abs_params(dev->input, ABS_X, 0,
(ATP_XSENSORS - 1) *
ATP_XFACT - 1,
ATP_FUZZ, 0);
break;
}
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,
ATP_XFACT, &x_z, &x_f);
y = atp_calculate_abs(dev->xy_acc + ATP_XSENSORS, ATP_YSENSORS,
ATP_YFACT, &y_z, &y_f);
key = dev->data[dev->datalen - 1] & 1;
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);
/*
* Many Geysers 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. Re-initialization does not
* work on Fountain touchpads.
*/
if (dev->type != ATP_FOUNTAIN) {
/*
* 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->valid = false;
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->type != ATP_FOUNTAIN) {
/* 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;
/* 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->type = id->driver_info;
dev->overflow_warned = false;
if (dev->type == ATP_FOUNTAIN || dev->type == ATP_GEYSER1)
dev->datalen = 81;
else
dev->datalen = 64;
dev->urb = usb_alloc_urb(0, GFP_KERNEL);
if (!dev->urb)
goto err_free_devs;
dev->data = usb_buffer_alloc(dev->udev, dev->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->datalen, atp_complete, 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);
if (dev->type == ATP_GEYSER3 || dev->type == ATP_GEYSER4) {
/*
* MacBook have 20 X sensors, 10 Y sensors
*/
input_set_abs_params(input_dev, ABS_X, 0,
((20 - 1) * ATP_XFACT) - 1, ATP_FUZZ, 0);
input_set_abs_params(input_dev, ABS_Y, 0,
((10 - 1) * ATP_YFACT) - 1, ATP_FUZZ, 0);
} else if (dev->type == ATP_GEYSER2) {
/*
* Oct 2005 15" PowerBooks have 15 X sensors, 17" are detected
* later.
*/
input_set_abs_params(input_dev, ABS_X, 0,
((15 - 1) * ATP_XFACT) - 1, ATP_FUZZ, 0);
input_set_abs_params(input_dev, ABS_Y, 0,
((9 - 1) * ATP_YFACT) - 1, ATP_FUZZ, 0);
} else {
/*
* 12" and 15" Powerbooks only have 16 x sensors,
* 17" models are detected later.
*/
input_set_abs_params(input_dev, ABS_X, 0,
(16 - 1) * ATP_XFACT - 1,
ATP_FUZZ, 0);
input_set_abs_params(input_dev, ABS_Y, 0,
(ATP_YSENSORS - 1) * ATP_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->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->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);
dev->valid = false;
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);
