zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/drivers/input/mouse/appletouch.c b/ap/os/linux/linux-3.4.x/drivers/input/mouse/appletouch.c
new file mode 100644
index 0000000..0acbc7d
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/input/mouse/appletouch.c
@@ -0,0 +1,941 @@
+/*
+ * 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) 2005-2008 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>
+
+/*
+ * Note: We try to keep the touchpad aspect ratio while still doing only
+ * simple arithmetics:
+ * 0 <= x <= (xsensors - 1) * xfact
+ * 0 <= y <= (ysensors - 1) * yfact
+ */
+struct atp_info {
+ int xsensors; /* number of X sensors */
+ int xsensors_17; /* 17" models have more sensors */
+ int ysensors; /* number of Y sensors */
+ int xfact; /* X multiplication factor */
+ int yfact; /* Y multiplication factor */
+ int datalen; /* size of USB transfers */
+ void (*callback)(struct urb *); /* callback function */
+};
+
+static void atp_complete_geyser_1_2(struct urb *urb);
+static void atp_complete_geyser_3_4(struct urb *urb);
+
+static const struct atp_info fountain_info = {
+ .xsensors = 16,
+ .xsensors_17 = 26,
+ .ysensors = 16,
+ .xfact = 64,
+ .yfact = 43,
+ .datalen = 81,
+ .callback = atp_complete_geyser_1_2,
+};
+
+static const struct atp_info geyser1_info = {
+ .xsensors = 16,
+ .xsensors_17 = 26,
+ .ysensors = 16,
+ .xfact = 64,
+ .yfact = 43,
+ .datalen = 81,
+ .callback = atp_complete_geyser_1_2,
+};
+
+static const struct atp_info geyser2_info = {
+ .xsensors = 15,
+ .xsensors_17 = 20,
+ .ysensors = 9,
+ .xfact = 64,
+ .yfact = 43,
+ .datalen = 64,
+ .callback = atp_complete_geyser_1_2,
+};
+
+static const struct atp_info geyser3_info = {
+ .xsensors = 20,
+ .ysensors = 10,
+ .xfact = 64,
+ .yfact = 64,
+ .datalen = 64,
+ .callback = atp_complete_geyser_3_4,
+};
+
+static const struct atp_info geyser4_info = {
+ .xsensors = 20,
+ .ysensors = 10,
+ .xfact = 64,
+ .yfact = 64,
+ .datalen = 64,
+ .callback = atp_complete_geyser_3_4,
+};
+
+#define ATP_DEVICE(prod, info) \
+{ \
+ .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 = (unsigned long) &info, \
+}
+
+/*
+ * Table of devices (Product IDs) that work with this driver.
+ * (The names come from Info.plist in AppleUSBTrackpad.kext,
+ * According to Info.plist Geyser IV is the same as Geyser III.)
+ */
+
+static struct usb_device_id atp_table[] = {
+ /* PowerBooks Feb 2005, iBooks G4 */
+ ATP_DEVICE(0x020e, fountain_info), /* FOUNTAIN ANSI */
+ ATP_DEVICE(0x020f, fountain_info), /* FOUNTAIN ISO */
+ ATP_DEVICE(0x030a, fountain_info), /* FOUNTAIN TP ONLY */
+ ATP_DEVICE(0x030b, geyser1_info), /* GEYSER 1 TP ONLY */
+
+ /* PowerBooks Oct 2005 */
+ ATP_DEVICE(0x0214, geyser2_info), /* GEYSER 2 ANSI */
+ ATP_DEVICE(0x0215, geyser2_info), /* GEYSER 2 ISO */
+ ATP_DEVICE(0x0216, geyser2_info), /* GEYSER 2 JIS */
+
+ /* Core Duo MacBook & MacBook Pro */
+ ATP_DEVICE(0x0217, geyser3_info), /* GEYSER 3 ANSI */
+ ATP_DEVICE(0x0218, geyser3_info), /* GEYSER 3 ISO */
+ ATP_DEVICE(0x0219, geyser3_info), /* GEYSER 3 JIS */
+
+ /* Core2 Duo MacBook & MacBook Pro */
+ ATP_DEVICE(0x021a, geyser4_info), /* GEYSER 4 ANSI */
+ ATP_DEVICE(0x021b, geyser4_info), /* GEYSER 4 ISO */
+ ATP_DEVICE(0x021c, geyser4_info), /* GEYSER 4 JIS */
+
+ /* Core2 Duo MacBook3,1 */
+ ATP_DEVICE(0x0229, geyser4_info), /* GEYSER 4 HF ANSI */
+ ATP_DEVICE(0x022a, geyser4_info), /* GEYSER 4 HF ISO */
+ ATP_DEVICE(0x022b, geyser4_info), /* GEYSER 4 HF JIS */
+
+ /* Terminating entry */
+ { }
+};
+MODULE_DEVICE_TABLE(usb, atp_table);
+
+/* maximum number of 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
+
+/*
+ * 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
+
+/**
+ * enum atp_status_bits - status bit meanings
+ *
+ * These constants represent the meaning of the status bits.
+ * (only Geyser 3/4)
+ *
+ * @ATP_STATUS_BUTTON: The button was pressed
+ * @ATP_STATUS_BASE_UPDATE: Update of the base values (untouched pad)
+ * @ATP_STATUS_FROM_RESET: Reset previously performed
+ */
+enum atp_status_bits {
+ ATP_STATUS_BUTTON = BIT(0),
+ ATP_STATUS_BASE_UPDATE = BIT(2),
+ ATP_STATUS_FROM_RESET = BIT(4),
+};
+
+/* 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 */
+ u8 *data; /* transferred data */
+ struct input_dev *input; /* input dev */
+ const struct atp_info *info; /* touchpad model */
+ 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 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;
+ int size;
+ int i;
+ int ret;
+
+ data = kmalloc(8, GFP_KERNEL);
+ if (!data) {
+ err("Out of memory");
+ return -ENOMEM;
+ }
+
+ 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.");
+ ret = -EIO;
+ goto out_free;
+ }
+
+ /* 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");
+ ret = -EIO;
+ goto out_free;
+ }
+ ret = 0;
+out_free:
+ kfree(data);
+ return ret;
+}
+
+/*
+ * 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");
+ 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] > threshold)) {
+ 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);
+}
+
+/* Check URB status and for correct length of data package */
+
+#define ATP_URB_STATUS_SUCCESS 0
+#define ATP_URB_STATUS_ERROR 1
+#define ATP_URB_STATUS_ERROR_FATAL 2
+
+static int atp_status_check(struct urb *urb)
+{
+ 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->info->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 ATP_URB_STATUS_ERROR_FATAL;
+
+ default:
+ dbg("atp_complete: nonzero urb status received: %d",
+ urb->status);
+ return ATP_URB_STATUS_ERROR;
+ }
+
+ /* drop incomplete datasets */
+ if (dev->urb->actual_length != dev->info->datalen) {
+ dprintk("appletouch: incomplete data package"
+ " (first byte: %d, length: %d).\n",
+ dev->data[0], dev->urb->actual_length);
+ return ATP_URB_STATUS_ERROR;
+ }
+
+ return ATP_URB_STATUS_SUCCESS;
+}
+
+static void atp_detect_size(struct atp *dev)
+{
+ int i;
+
+ /* 17" Powerbooks have extra X sensors */
+ for (i = dev->info->xsensors; i < ATP_XSENSORS; i++) {
+ if (dev->xy_cur[i]) {
+
+ printk(KERN_INFO "appletouch: 17\" model detected.\n");
+
+ input_set_abs_params(dev->input, ABS_X, 0,
+ (dev->info->xsensors_17 - 1) *
+ dev->info->xfact - 1,
+ ATP_FUZZ, 0);
+ break;
+ }
+ }
+}
+
+/*
+ * USB interrupt callback functions
+ */
+
+/* Interrupt function for older touchpads: FOUNTAIN/GEYSER1/GEYSER2 */
+
+static void atp_complete_geyser_1_2(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 */
+ if (dev->info == &geyser2_info) {
+ 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[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("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_alloc_coherent(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_free_coherent(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_free_coherent(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,
+};
+
+module_usb_driver(atp_driver);