cregit-Linux how code gets into the kernel

Release 4.7 drivers/hid/usbhid/usbmouse.c

/*
 *  Copyright (c) 1999-2001 Vojtech Pavlik
 *
 *  USB HIDBP Mouse support
 */

/*
 * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 *
 * Should you need to contact me, the author, you can do so either by
 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
 */

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

/* for apple IDs */
#ifdef CONFIG_USB_HID_MODULE
#include "../hid-ids.h"
#endif

/*
 * Version Information
 */

#define DRIVER_VERSION "v1.6"

#define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@ucw.cz>"

#define DRIVER_DESC "USB HID Boot Protocol mouse driver"

#define DRIVER_LICENSE "GPL"


MODULE_AUTHOR(DRIVER_AUTHOR);

MODULE_DESCRIPTION(DRIVER_DESC);

MODULE_LICENSE(DRIVER_LICENSE);


struct usb_mouse {
	
char name[128];
	
char phys[64];
	
struct usb_device *usbdev;
	
struct input_dev *dev;
	
struct urb *irq;

	
signed char *data;
	
dma_addr_t data_dma;
};


static void usb_mouse_irq(struct urb *urb) { struct usb_mouse *mouse = urb->context; signed char *data = mouse->data; struct input_dev *dev = mouse->dev; int status; switch (urb->status) { case 0: /* success */ break; case -ECONNRESET: /* unlink */ case -ENOENT: case -ESHUTDOWN: return; /* -EPIPE: should clear the halt */ default: /* error */ goto resubmit; } input_report_key(dev, BTN_LEFT, data[0] & 0x01); input_report_key(dev, BTN_RIGHT, data[0] & 0x02); input_report_key(dev, BTN_MIDDLE, data[0] & 0x04); input_report_key(dev, BTN_SIDE, data[0] & 0x08); input_report_key(dev, BTN_EXTRA, data[0] & 0x10); input_report_rel(dev, REL_X, data[1]); input_report_rel(dev, REL_Y, data[2]); input_report_rel(dev, REL_WHEEL, data[3]); input_sync(dev); resubmit: status = usb_submit_urb (urb, GFP_ATOMIC); if (status) dev_err(&mouse->usbdev->dev, "can't resubmit intr, %s-%s/input0, status %d\n", mouse->usbdev->bus->bus_name, mouse->usbdev->devpath, status); }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git15065.79%233.33%
david brownelldavid brownell6327.63%116.67%
greg kroah-hartmangreg kroah-hartman93.95%116.67%
vojtech pavlikvojtech pavlik52.19%116.67%
christoph lameterchristoph lameter10.44%116.67%
Total228100.00%6100.00%


static int usb_mouse_open(struct input_dev *dev) { struct usb_mouse *mouse = input_get_drvdata(dev); mouse->irq->dev = mouse->usbdev; if (usb_submit_urb(mouse->irq, GFP_KERNEL)) return -EIO; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git4387.76%350.00%
dmitry torokhovdmitry torokhov36.12%116.67%
greg kroah-hartmangreg kroah-hartman24.08%116.67%
linus torvaldslinus torvalds12.04%116.67%
Total49100.00%6100.00%


static void usb_mouse_close(struct input_dev *dev) { struct usb_mouse *mouse = input_get_drvdata(dev); usb_kill_urb(mouse->irq); }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git2485.71%250.00%
dmitry torokhovdmitry torokhov310.71%125.00%
borislav petkovborislav petkov13.57%125.00%
Total28100.00%4100.00%


static int usb_mouse_probe(struct usb_interface *intf, const struct usb_device_id *id) { struct usb_device *dev = interface_to_usbdev(intf); struct usb_host_interface *interface; struct usb_endpoint_descriptor *endpoint; struct usb_mouse *mouse; struct input_dev *input_dev; int pipe, maxp; int error = -ENOMEM; interface = intf->cur_altsetting; if (interface->desc.bNumEndpoints != 1) return -ENODEV; endpoint = &interface->endpoint[0].desc; if (!usb_endpoint_is_int_in(endpoint)) return -ENODEV; pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress); maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe)); mouse = kzalloc(sizeof(struct usb_mouse), GFP_KERNEL); input_dev = input_allocate_device(); if (!mouse || !input_dev) goto fail1; mouse->data = usb_alloc_coherent(dev, 8, GFP_ATOMIC, &mouse->data_dma); if (!mouse->data) goto fail1; mouse->irq = usb_alloc_urb(0, GFP_KERNEL); if (!mouse->irq) goto fail2; mouse->usbdev = dev; mouse->dev = input_dev; if (dev->manufacturer) strlcpy(mouse->name, dev->manufacturer, sizeof(mouse->name)); if (dev->product) { if (dev->manufacturer) strlcat(mouse->name, " ", sizeof(mouse->name)); strlcat(mouse->name, dev->product, sizeof(mouse->name)); } if (!strlen(mouse->name)) snprintf(mouse->name, sizeof(mouse->name), "USB HIDBP Mouse %04x:%04x", le16_to_cpu(dev->descriptor.idVendor), le16_to_cpu(dev->descriptor.idProduct)); usb_make_path(dev, mouse->phys, sizeof(mouse->phys)); strlcat(mouse->phys, "/input0", sizeof(mouse->phys)); input_dev->name = mouse->name; input_dev->phys = mouse->phys; usb_to_input_id(dev, &input_dev->id); input_dev->dev.parent = &intf->dev; input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL); input_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) | BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE); input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y); input_dev->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_SIDE) | BIT_MASK(BTN_EXTRA); input_dev->relbit[0] |= BIT_MASK(REL_WHEEL); input_set_drvdata(input_dev, mouse); input_dev->open = usb_mouse_open; input_dev->close = usb_mouse_close; usb_fill_int_urb(mouse->irq, dev, pipe, mouse->data, (maxp > 8 ? 8 : maxp), usb_mouse_irq, mouse, endpoint->bInterval); mouse->irq->transfer_dma = mouse->data_dma; mouse->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; error = input_register_device(mouse->dev); if (error) goto fail3; usb_set_intfdata(intf, mouse); return 0; fail3: usb_free_urb(mouse->irq); fail2: usb_free_coherent(dev, 8, mouse->data, mouse->data_dma); fail1: input_free_device(input_dev); kfree(mouse); return error; }

Contributors

PersonTokensPropCommitsCommitProp
dmitry torokhovdmitry torokhov26842.54%316.67%
pre-gitpre-git23937.94%422.22%
david s. millerdavid s. miller538.41%15.56%
greg kroah-hartmangreg kroah-hartman223.49%316.67%
linus torvaldslinus torvalds213.33%15.56%
jiri slabyjiri slaby121.90%15.56%
david brownelldavid brownell81.27%15.56%
luiz fernando capitulinoluiz fernando capitulino30.48%15.56%
daniel mackdaniel mack20.32%15.56%
christoph lameterchristoph lameter10.16%15.56%
alan sternalan stern10.16%15.56%
Total630100.00%18100.00%


static void usb_mouse_disconnect(struct usb_interface *intf) { struct usb_mouse *mouse = usb_get_intfdata (intf); usb_set_intfdata(intf, NULL); if (mouse) { usb_kill_urb(mouse->irq); input_unregister_device(mouse->dev); usb_free_urb(mouse->irq); usb_free_coherent(interface_to_usbdev(intf), 8, mouse->data, mouse->data_dma); kfree(mouse); } }

Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git3342.31%114.29%
greg kroah-hartmangreg kroah-hartman2329.49%228.57%
david s. millerdavid s. miller1316.67%114.29%
linus torvaldslinus torvalds78.97%114.29%
borislav petkovborislav petkov11.28%114.29%
daniel mackdaniel mack11.28%114.29%
Total78100.00%7100.00%

static struct usb_device_id usb_mouse_id_table [] = { { USB_INTERFACE_INFO(USB_INTERFACE_CLASS_HID, USB_INTERFACE_SUBCLASS_BOOT, USB_INTERFACE_PROTOCOL_MOUSE) }, { } /* Terminating entry */ }; MODULE_DEVICE_TABLE (usb, usb_mouse_id_table); static struct usb_driver usb_mouse_driver = { .name = "usbmouse", .probe = usb_mouse_probe, .disconnect = usb_mouse_disconnect, .id_table = usb_mouse_id_table, }; module_usb_driver(usb_mouse_driver);

Overall Contributors

PersonTokensPropCommitsCommitProp
pre-gitpre-git58149.45%820.00%
dmitry torokhovdmitry torokhov27623.49%410.00%
david s. millerdavid s. miller746.30%12.50%
david brownelldavid brownell726.13%37.50%
greg kroah-hartmangreg kroah-hartman584.94%717.50%
linus torvaldslinus torvalds494.17%410.00%
jiri slabyjiri slaby211.79%25.00%
vojtech pavlikvojtech pavlik171.45%25.00%
rusty russellrusty russell80.68%12.50%
michael opdenackermichael opdenacker60.51%12.50%
daniel mackdaniel mack30.26%12.50%
luiz fernando capitulinoluiz fernando capitulino30.26%12.50%
borislav petkovborislav petkov20.17%12.50%
christoph lameterchristoph lameter20.17%12.50%
johannes erdfeltjohannes erdfelt10.09%12.50%
adrian bunkadrian bunk10.09%12.50%
alan sternalan stern10.09%12.50%
Total1175100.00%40100.00%
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