cregit-Linux how code gets into the kernel

Release 4.11 drivers/input/mouse/synaptics_usb.c

/*
 * USB Synaptics device driver
 *
 *  Copyright (c) 2002 Rob Miller (rob@inpharmatica . co . uk)
 *  Copyright (c) 2003 Ron Lee (ron@debian.org)
 *      cPad driver for kernel 2.4
 *
 *  Copyright (c) 2004 Jan Steinhoff (cpad@jan-steinhoff . de)
 *  Copyright (c) 2004 Ron Lee (ron@debian.org)
 *      rewritten for kernel 2.6
 *
 *  cPad display character device part is not included. It can be found at
 *  http://jan-steinhoff.de/linux/synaptics-usb.html
 *
 * Bases on:    usb_skeleton.c v2.2 by Greg Kroah-Hartman
 *              drivers/hid/usbhid/usbmouse.c by Vojtech Pavlik
 *              drivers/input/mouse/synaptics.c by Peter Osterlund
 *
 * 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.
 *
 * Trademarks are the property of their respective owners.
 */

/*
 * There are three different types of Synaptics USB devices: Touchpads,
 * touchsticks (or trackpoints), and touchscreens. Touchpads are well supported
 * by this driver, touchstick support has not been tested much yet, and
 * touchscreens have not been tested at all.
 *
 * Up to three alternate settings are possible:
 *      setting 0: one int endpoint for relative movement (used by usbhid.ko)
 *      setting 1: one int endpoint for absolute finger position
 *      setting 2 (cPad only): one int endpoint for absolute finger position and
 *                 two bulk endpoints for the display (in/out)
 * This driver uses setting 1.
 */

#include <linux/kernel.h>
#include <linux/slab.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/usb.h>
#include <linux/input.h>
#include <linux/usb/input.h>


#define USB_VENDOR_ID_SYNAPTICS	0x06cb

#define USB_DEVICE_ID_SYNAPTICS_TP	0x0001	
/* Synaptics USB TouchPad */

#define USB_DEVICE_ID_SYNAPTICS_INT_TP	0x0002	
/* Integrated USB TouchPad */

#define USB_DEVICE_ID_SYNAPTICS_CPAD	0x0003	
/* Synaptics cPad */

#define USB_DEVICE_ID_SYNAPTICS_TS	0x0006	
/* Synaptics TouchScreen */

#define USB_DEVICE_ID_SYNAPTICS_STICK	0x0007	
/* Synaptics USB Styk */

#define USB_DEVICE_ID_SYNAPTICS_WP	0x0008	
/* Synaptics USB WheelPad */

#define USB_DEVICE_ID_SYNAPTICS_COMP_TP	0x0009	
/* Composite USB TouchPad */

#define USB_DEVICE_ID_SYNAPTICS_WTP	0x0010	
/* Wireless TouchPad */

#define USB_DEVICE_ID_SYNAPTICS_DPAD	0x0013	
/* DisplayPad */


#define SYNUSB_TOUCHPAD			(1 << 0)

#define SYNUSB_STICK			(1 << 1)

#define SYNUSB_TOUCHSCREEN		(1 << 2)

#define SYNUSB_AUXDISPLAY		(1 << 3) 
/* For cPad */

#define SYNUSB_COMBO			(1 << 4) 
/* Composite device (TP + stick) */

#define SYNUSB_IO_ALWAYS		(1 << 5)


#define USB_DEVICE_SYNAPTICS(prod, kind)		\
	USB_DEVICE(USB_VENDOR_ID_SYNAPTICS,             \
                   USB_DEVICE_ID_SYNAPTICS_##prod),     \
        .driver_info = (kind),


#define SYNUSB_RECV_SIZE	8


#define XMIN_NOMINAL		1472

#define XMAX_NOMINAL		5472

#define YMIN_NOMINAL		1408

#define YMAX_NOMINAL		4448


struct synusb {
	
struct usb_device *udev;
	
struct usb_interface *intf;
	
struct urb *urb;
	
unsigned char *data;

	/* input device related data structures */
	
struct input_dev *input;
	
char name[128];
	
char phys[64];

	/* characteristics of the device */
	
unsigned long flags;
};


static void synusb_report_buttons(struct synusb *synusb) { struct input_dev *input_dev = synusb->input; input_report_key(input_dev, BTN_LEFT, synusb->data[1] & 0x04); input_report_key(input_dev, BTN_RIGHT, synusb->data[1] & 0x01); input_report_key(input_dev, BTN_MIDDLE, synusb->data[1] & 0x02); }

Contributors

PersonTokensPropCommitsCommitProp
Jan Steinhoff68100.00%1100.00%
Total68100.00%1100.00%


static void synusb_report_stick(struct synusb *synusb) { struct input_dev *input_dev = synusb->input; int x, y; unsigned int pressure; pressure = synusb->data[6]; x = (s16)(be16_to_cpup((__be16 *)&synusb->data[2]) << 3) >> 7; y = (s16)(be16_to_cpup((__be16 *)&synusb->data[4]) << 3) >> 7; if (pressure > 0) { input_report_rel(input_dev, REL_X, x); input_report_rel(input_dev, REL_Y, -y); } input_report_abs(input_dev, ABS_PRESSURE, pressure); synusb_report_buttons(synusb); input_sync(input_dev); }

Contributors

PersonTokensPropCommitsCommitProp
Jan Steinhoff136100.00%1100.00%
Total136100.00%1100.00%


static void synusb_report_touchpad(struct synusb *synusb) { struct input_dev *input_dev = synusb->input; unsigned int num_fingers, tool_width; unsigned int x, y; unsigned int pressure, w; pressure = synusb->data[6]; x = be16_to_cpup((__be16 *)&synusb->data[2]); y = be16_to_cpup((__be16 *)&synusb->data[4]); w = synusb->data[0] & 0x0f; if (pressure > 0) { num_fingers = 1; tool_width = 5; switch (w) { case 0 ... 1: num_fingers = 2 + w; break; case 2: /* pen, pretend its a finger */ break; case 4 ... 15: tool_width = w; break; } } else { num_fingers = 0; tool_width = 0; } /* * Post events * BTN_TOUCH has to be first as mousedev relies on it when doing * absolute -> relative conversion */ if (pressure > 30) input_report_key(input_dev, BTN_TOUCH, 1); if (pressure < 25) input_report_key(input_dev, BTN_TOUCH, 0); if (num_fingers > 0) { input_report_abs(input_dev, ABS_X, x); input_report_abs(input_dev, ABS_Y, YMAX_NOMINAL + YMIN_NOMINAL - y); } input_report_abs(input_dev, ABS_PRESSURE, pressure); input_report_abs(input_dev, ABS_TOOL_WIDTH, tool_width); input_report_key(input_dev, BTN_TOOL_FINGER, num_fingers == 1); input_report_key(input_dev, BTN_TOOL_DOUBLETAP, num_fingers == 2); input_report_key(input_dev, BTN_TOOL_TRIPLETAP, num_fingers == 3); synusb_report_buttons(synusb); if (synusb->flags & SYNUSB_AUXDISPLAY) input_report_key(input_dev, BTN_MIDDLE, synusb->data[1] & 0x08); input_sync(input_dev); }

Contributors

PersonTokensPropCommitsCommitProp
Jan Steinhoff298100.00%1100.00%
Total298100.00%1100.00%


static void synusb_irq(struct urb *urb) { struct synusb *synusb = urb->context; int error; /* Check our status in case we need to bail out early. */ switch (urb->status) { case 0: usb_mark_last_busy(synusb->udev); break; /* Device went away so don't keep trying to read from it. */ case -ECONNRESET: case -ENOENT: case -ESHUTDOWN: return; default: goto resubmit; break; } if (synusb->flags & SYNUSB_STICK) synusb_report_stick(synusb); else synusb_report_touchpad(synusb); resubmit: error = usb_submit_urb(urb, GFP_ATOMIC); if (error && error != -EPERM) dev_err(&synusb->intf->dev, "%s - usb_submit_urb failed with result: %d", __func__, error); }

Contributors

PersonTokensPropCommitsCommitProp
Jan Steinhoff117100.00%1100.00%
Total117100.00%1100.00%


static struct usb_endpoint_descriptor * synusb_get_in_endpoint(struct usb_host_interface *iface) { struct usb_endpoint_descriptor *endpoint; int i; for (i = 0; i < iface->desc.bNumEndpoints; ++i) { endpoint = &iface->endpoint[i].desc; if (usb_endpoint_is_int_in(endpoint)) { /* we found our interrupt in endpoint */ return endpoint; } } return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Jan Steinhoff68100.00%1100.00%
Total68100.00%1100.00%


static int synusb_open(struct input_dev *dev) { struct synusb *synusb = input_get_drvdata(dev); int retval; retval = usb_autopm_get_interface(synusb->intf); if (retval) { dev_err(&synusb->intf->dev, "%s - usb_autopm_get_interface failed, error: %d\n", __func__, retval); return retval; } retval = usb_submit_urb(synusb->urb, GFP_KERNEL); if (retval) { dev_err(&synusb->intf->dev, "%s - usb_submit_urb failed, error: %d\n", __func__, retval); retval = -EIO; goto out; } synusb->intf->needs_remote_wakeup = 1; out: usb_autopm_put_interface(synusb->intf); return retval; }

Contributors

PersonTokensPropCommitsCommitProp
Jan Steinhoff119100.00%1100.00%
Total119100.00%1100.00%


static void synusb_close(struct input_dev *dev) { struct synusb *synusb = input_get_drvdata(dev); int autopm_error; autopm_error = usb_autopm_get_interface(synusb->intf); usb_kill_urb(synusb->urb); synusb->intf->needs_remote_wakeup = 0; if (!autopm_error) usb_autopm_put_interface(synusb->intf); }

Contributors

PersonTokensPropCommitsCommitProp
Jan Steinhoff60100.00%1100.00%
Total60100.00%1100.00%


static int synusb_probe(struct usb_interface *intf, const struct usb_device_id *id) { struct usb_device *udev = interface_to_usbdev(intf); struct usb_endpoint_descriptor *ep; struct synusb *synusb; struct input_dev *input_dev; unsigned int intf_num = intf->cur_altsetting->desc.bInterfaceNumber; unsigned int altsetting = min(intf->num_altsetting, 1U); int error; error = usb_set_interface(udev, intf_num, altsetting); if (error) { dev_err(&udev->dev, "Can not set alternate setting to %i, error: %i", altsetting, error); return error; } ep = synusb_get_in_endpoint(intf->cur_altsetting); if (!ep) return -ENODEV; synusb = kzalloc(sizeof(*synusb), GFP_KERNEL); input_dev = input_allocate_device(); if (!synusb || !input_dev) { error = -ENOMEM; goto err_free_mem; } synusb->udev = udev; synusb->intf = intf; synusb->input = input_dev; synusb->flags = id->driver_info; if (synusb->flags & SYNUSB_COMBO) { /* * This is a combo device, we need to set proper * capability, depending on the interface. */ synusb->flags |= intf_num == 1 ? SYNUSB_STICK : SYNUSB_TOUCHPAD; } synusb->urb = usb_alloc_urb(0, GFP_KERNEL); if (!synusb->urb) { error = -ENOMEM; goto err_free_mem; } synusb->data = usb_alloc_coherent(udev, SYNUSB_RECV_SIZE, GFP_KERNEL, &synusb->urb->transfer_dma); if (!synusb->data) { error = -ENOMEM; goto err_free_urb; } usb_fill_int_urb(synusb->urb, udev, usb_rcvintpipe(udev, ep->bEndpointAddress), synusb->data, SYNUSB_RECV_SIZE, synusb_irq, synusb, ep->bInterval); synusb->urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; if (udev->manufacturer) strlcpy(synusb->name, udev->manufacturer, sizeof(synusb->name)); if (udev->product) { if (udev->manufacturer) strlcat(synusb->name, " ", sizeof(synusb->name)); strlcat(synusb->name, udev->product, sizeof(synusb->name)); } if (!strlen(synusb->name)) snprintf(synusb->name, sizeof(synusb->name), "USB Synaptics Device %04x:%04x", le16_to_cpu(udev->descriptor.idVendor), le16_to_cpu(udev->descriptor.idProduct)); if (synusb->flags & SYNUSB_STICK) strlcat(synusb->name, " (Stick)", sizeof(synusb->name)); usb_make_path(udev, synusb->phys, sizeof(synusb->phys)); strlcat(synusb->phys, "/input0", sizeof(synusb->phys)); input_dev->name = synusb->name; input_dev->phys = synusb->phys; usb_to_input_id(udev, &input_dev->id); input_dev->dev.parent = &synusb->intf->dev; if (!(synusb->flags & SYNUSB_IO_ALWAYS)) { input_dev->open = synusb_open; input_dev->close = synusb_close; } input_set_drvdata(input_dev, synusb); __set_bit(EV_ABS, input_dev->evbit); __set_bit(EV_KEY, input_dev->evbit); if (synusb->flags & SYNUSB_STICK) { __set_bit(EV_REL, input_dev->evbit); __set_bit(REL_X, input_dev->relbit); __set_bit(REL_Y, input_dev->relbit); __set_bit(INPUT_PROP_POINTING_STICK, input_dev->propbit); input_set_abs_params(input_dev, ABS_PRESSURE, 0, 127, 0, 0); } else { input_set_abs_params(input_dev, ABS_X, XMIN_NOMINAL, XMAX_NOMINAL, 0, 0); input_set_abs_params(input_dev, ABS_Y, YMIN_NOMINAL, YMAX_NOMINAL, 0, 0); input_set_abs_params(input_dev, ABS_PRESSURE, 0, 255, 0, 0); input_set_abs_params(input_dev, ABS_TOOL_WIDTH, 0, 15, 0, 0); __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); } if (synusb->flags & SYNUSB_TOUCHSCREEN) __set_bit(INPUT_PROP_DIRECT, input_dev->propbit); else __set_bit(INPUT_PROP_POINTER, input_dev->propbit); __set_bit(BTN_LEFT, input_dev->keybit); __set_bit(BTN_RIGHT, input_dev->keybit); __set_bit(BTN_MIDDLE, input_dev->keybit); usb_set_intfdata(intf, synusb); if (synusb->flags & SYNUSB_IO_ALWAYS) { error = synusb_open(input_dev); if (error) goto err_free_dma; } error = input_register_device(input_dev); if (error) { dev_err(&udev->dev, "Failed to register input device, error %d\n", error); goto err_stop_io; } return 0; err_stop_io: if (synusb->flags & SYNUSB_IO_ALWAYS) synusb_close(synusb->input); err_free_dma: usb_free_coherent(udev, SYNUSB_RECV_SIZE, synusb->data, synusb->urb->transfer_dma); err_free_urb: usb_free_urb(synusb->urb); err_free_mem: input_free_device(input_dev); kfree(synusb); usb_set_intfdata(intf, NULL); return error; }

Contributors

PersonTokensPropCommitsCommitProp
Jan Steinhoff87995.96%125.00%
Hans de Goede363.93%250.00%
Bob Ross10.11%125.00%
Total916100.00%4100.00%


static void synusb_disconnect(struct usb_interface *intf) { struct synusb *synusb = usb_get_intfdata(intf); struct usb_device *udev = interface_to_usbdev(intf); if (synusb->flags & SYNUSB_IO_ALWAYS) synusb_close(synusb->input); input_unregister_device(synusb->input); usb_free_coherent(udev, SYNUSB_RECV_SIZE, synusb->data, synusb->urb->transfer_dma); usb_free_urb(synusb->urb); kfree(synusb); usb_set_intfdata(intf, NULL); }

Contributors

PersonTokensPropCommitsCommitProp
Jan Steinhoff89100.00%1100.00%
Total89100.00%1100.00%


static int synusb_suspend(struct usb_interface *intf, pm_message_t message) { struct synusb *synusb = usb_get_intfdata(intf); struct input_dev *input_dev = synusb->input; mutex_lock(&input_dev->mutex); usb_kill_urb(synusb->urb); mutex_unlock(&input_dev->mutex); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Jan Steinhoff59100.00%1100.00%
Total59100.00%1100.00%


static int synusb_resume(struct usb_interface *intf) { struct synusb *synusb = usb_get_intfdata(intf); struct input_dev *input_dev = synusb->input; int retval = 0; mutex_lock(&input_dev->mutex); if ((input_dev->users || (synusb->flags & SYNUSB_IO_ALWAYS)) && usb_submit_urb(synusb->urb, GFP_NOIO) < 0) { retval = -EIO; } mutex_unlock(&input_dev->mutex); return retval; }

Contributors

PersonTokensPropCommitsCommitProp
Jan Steinhoff88100.00%1100.00%
Total88100.00%1100.00%


static int synusb_pre_reset(struct usb_interface *intf) { struct synusb *synusb = usb_get_intfdata(intf); struct input_dev *input_dev = synusb->input; mutex_lock(&input_dev->mutex); usb_kill_urb(synusb->urb); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Jan Steinhoff48100.00%1100.00%
Total48100.00%1100.00%


static int synusb_post_reset(struct usb_interface *intf) { struct synusb *synusb = usb_get_intfdata(intf); struct input_dev *input_dev = synusb->input; int retval = 0; if ((input_dev->users || (synusb->flags & SYNUSB_IO_ALWAYS)) && usb_submit_urb(synusb->urb, GFP_NOIO) < 0) { retval = -EIO; } mutex_unlock(&input_dev->mutex); return retval; }

Contributors

PersonTokensPropCommitsCommitProp
Jan Steinhoff80100.00%1100.00%
Total80100.00%1100.00%


static int synusb_reset_resume(struct usb_interface *intf) { return synusb_resume(intf); }

Contributors

PersonTokensPropCommitsCommitProp
Jan Steinhoff17100.00%1100.00%
Total17100.00%1100.00%

static struct usb_device_id synusb_idtable[] = { { USB_DEVICE_SYNAPTICS(TP, SYNUSB_TOUCHPAD) }, { USB_DEVICE_SYNAPTICS(INT_TP, SYNUSB_TOUCHPAD) }, { USB_DEVICE_SYNAPTICS(CPAD, SYNUSB_TOUCHPAD | SYNUSB_AUXDISPLAY | SYNUSB_IO_ALWAYS) }, { USB_DEVICE_SYNAPTICS(TS, SYNUSB_TOUCHSCREEN) }, { USB_DEVICE_SYNAPTICS(STICK, SYNUSB_STICK) }, { USB_DEVICE_SYNAPTICS(WP, SYNUSB_TOUCHPAD) }, { USB_DEVICE_SYNAPTICS(COMP_TP, SYNUSB_COMBO) }, { USB_DEVICE_SYNAPTICS(WTP, SYNUSB_TOUCHPAD) }, { USB_DEVICE_SYNAPTICS(DPAD, SYNUSB_TOUCHPAD) }, { } }; MODULE_DEVICE_TABLE(usb, synusb_idtable); static struct usb_driver synusb_driver = { .name = "synaptics_usb", .probe = synusb_probe, .disconnect = synusb_disconnect, .id_table = synusb_idtable, .suspend = synusb_suspend, .resume = synusb_resume, .pre_reset = synusb_pre_reset, .post_reset = synusb_post_reset, .reset_resume = synusb_reset_resume, .supports_autosuspend = 1, }; module_usb_driver(synusb_driver); MODULE_AUTHOR("Rob Miller <rob@inpharmatica.co.uk>, " "Ron Lee <ron@debian.org>, " "Jan Steinhoff <cpad@jan-steinhoff.de>"); MODULE_DESCRIPTION("Synaptics USB device driver"); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
Jan Steinhoff247798.45%120.00%
Hans de Goede361.43%240.00%
Dmitry Torokhov20.08%120.00%
Bob Ross10.04%120.00%
Total2516100.00%5100.00%
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.