linux/drivers/hid/usbhid/usbmouse.c
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   1/*
   2 *  Copyright (c) 1999-2001 Vojtech Pavlik
   3 *
   4 *  USB HIDBP Mouse support
   5 */
   6
   7/*
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License as published by
  10 * the Free Software Foundation; either version 2 of the License, or
  11 * (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  21 *
  22 * Should you need to contact me, the author, you can do so either by
  23 * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  24 * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  25 */
  26
  27#include <linux/kernel.h>
  28#include <linux/slab.h>
  29#include <linux/module.h>
  30#include <linux/init.h>
  31#include <linux/usb/input.h>
  32#include <linux/hid.h>
  33
  34/* for apple IDs */
  35#ifdef CONFIG_USB_HID_MODULE
  36#include "../hid-ids.h"
  37#endif
  38
  39/*
  40 * Version Information
  41 */
  42#define DRIVER_VERSION "v1.6"
  43#define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@ucw.cz>"
  44#define DRIVER_DESC "USB HID Boot Protocol mouse driver"
  45#define DRIVER_LICENSE "GPL"
  46
  47MODULE_AUTHOR(DRIVER_AUTHOR);
  48MODULE_DESCRIPTION(DRIVER_DESC);
  49MODULE_LICENSE(DRIVER_LICENSE);
  50
  51struct usb_mouse {
  52        char name[128];
  53        char phys[64];
  54        struct usb_device *usbdev;
  55        struct input_dev *dev;
  56        struct urb *irq;
  57
  58        signed char *data;
  59        dma_addr_t data_dma;
  60};
  61
  62static void usb_mouse_irq(struct urb *urb)
  63{
  64        struct usb_mouse *mouse = urb->context;
  65        signed char *data = mouse->data;
  66        struct input_dev *dev = mouse->dev;
  67        int status;
  68
  69        switch (urb->status) {
  70        case 0:                 /* success */
  71                break;
  72        case -ECONNRESET:       /* unlink */
  73        case -ENOENT:
  74        case -ESHUTDOWN:
  75                return;
  76        /* -EPIPE:  should clear the halt */
  77        default:                /* error */
  78                goto resubmit;
  79        }
  80
  81        input_report_key(dev, BTN_LEFT,   data[0] & 0x01);
  82        input_report_key(dev, BTN_RIGHT,  data[0] & 0x02);
  83        input_report_key(dev, BTN_MIDDLE, data[0] & 0x04);
  84        input_report_key(dev, BTN_SIDE,   data[0] & 0x08);
  85        input_report_key(dev, BTN_EXTRA,  data[0] & 0x10);
  86
  87        input_report_rel(dev, REL_X,     data[1]);
  88        input_report_rel(dev, REL_Y,     data[2]);
  89        input_report_rel(dev, REL_WHEEL, data[3]);
  90
  91        input_sync(dev);
  92resubmit:
  93        status = usb_submit_urb (urb, GFP_ATOMIC);
  94        if (status)
  95                err ("can't resubmit intr, %s-%s/input0, status %d",
  96                                mouse->usbdev->bus->bus_name,
  97                                mouse->usbdev->devpath, status);
  98}
  99
 100static int usb_mouse_open(struct input_dev *dev)
 101{
 102        struct usb_mouse *mouse = input_get_drvdata(dev);
 103
 104        mouse->irq->dev = mouse->usbdev;
 105        if (usb_submit_urb(mouse->irq, GFP_KERNEL))
 106                return -EIO;
 107
 108        return 0;
 109}
 110
 111static void usb_mouse_close(struct input_dev *dev)
 112{
 113        struct usb_mouse *mouse = input_get_drvdata(dev);
 114
 115        usb_kill_urb(mouse->irq);
 116}
 117
 118static int usb_mouse_probe(struct usb_interface *intf, const struct usb_device_id *id)
 119{
 120        struct usb_device *dev = interface_to_usbdev(intf);
 121        struct usb_host_interface *interface;
 122        struct usb_endpoint_descriptor *endpoint;
 123        struct usb_mouse *mouse;
 124        struct input_dev *input_dev;
 125        int pipe, maxp;
 126        int error = -ENOMEM;
 127
 128        interface = intf->cur_altsetting;
 129
 130        if (interface->desc.bNumEndpoints != 1)
 131                return -ENODEV;
 132
 133        endpoint = &interface->endpoint[0].desc;
 134        if (!usb_endpoint_is_int_in(endpoint))
 135                return -ENODEV;
 136
 137        pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
 138        maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
 139
 140        mouse = kzalloc(sizeof(struct usb_mouse), GFP_KERNEL);
 141        input_dev = input_allocate_device();
 142        if (!mouse || !input_dev)
 143                goto fail1;
 144
 145        mouse->data = usb_alloc_coherent(dev, 8, GFP_ATOMIC, &mouse->data_dma);
 146        if (!mouse->data)
 147                goto fail1;
 148
 149        mouse->irq = usb_alloc_urb(0, GFP_KERNEL);
 150        if (!mouse->irq)
 151                goto fail2;
 152
 153        mouse->usbdev = dev;
 154        mouse->dev = input_dev;
 155
 156        if (dev->manufacturer)
 157                strlcpy(mouse->name, dev->manufacturer, sizeof(mouse->name));
 158
 159        if (dev->product) {
 160                if (dev->manufacturer)
 161                        strlcat(mouse->name, " ", sizeof(mouse->name));
 162                strlcat(mouse->name, dev->product, sizeof(mouse->name));
 163        }
 164
 165        if (!strlen(mouse->name))
 166                snprintf(mouse->name, sizeof(mouse->name),
 167                         "USB HIDBP Mouse %04x:%04x",
 168                         le16_to_cpu(dev->descriptor.idVendor),
 169                         le16_to_cpu(dev->descriptor.idProduct));
 170
 171        usb_make_path(dev, mouse->phys, sizeof(mouse->phys));
 172        strlcat(mouse->phys, "/input0", sizeof(mouse->phys));
 173
 174        input_dev->name = mouse->name;
 175        input_dev->phys = mouse->phys;
 176        usb_to_input_id(dev, &input_dev->id);
 177        input_dev->dev.parent = &intf->dev;
 178
 179        input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 180        input_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
 181                BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);
 182        input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 183        input_dev->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_SIDE) |
 184                BIT_MASK(BTN_EXTRA);
 185        input_dev->relbit[0] |= BIT_MASK(REL_WHEEL);
 186
 187        input_set_drvdata(input_dev, mouse);
 188
 189        input_dev->open = usb_mouse_open;
 190        input_dev->close = usb_mouse_close;
 191
 192        usb_fill_int_urb(mouse->irq, dev, pipe, mouse->data,
 193                         (maxp > 8 ? 8 : maxp),
 194                         usb_mouse_irq, mouse, endpoint->bInterval);
 195        mouse->irq->transfer_dma = mouse->data_dma;
 196        mouse->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 197
 198        error = input_register_device(mouse->dev);
 199        if (error)
 200                goto fail3;
 201
 202        usb_set_intfdata(intf, mouse);
 203        return 0;
 204
 205fail3:  
 206        usb_free_urb(mouse->irq);
 207fail2:  
 208        usb_free_coherent(dev, 8, mouse->data, mouse->data_dma);
 209fail1:  
 210        input_free_device(input_dev);
 211        kfree(mouse);
 212        return error;
 213}
 214
 215static void usb_mouse_disconnect(struct usb_interface *intf)
 216{
 217        struct usb_mouse *mouse = usb_get_intfdata (intf);
 218
 219        usb_set_intfdata(intf, NULL);
 220        if (mouse) {
 221                usb_kill_urb(mouse->irq);
 222                input_unregister_device(mouse->dev);
 223                usb_free_urb(mouse->irq);
 224                usb_free_coherent(interface_to_usbdev(intf), 8, mouse->data, mouse->data_dma);
 225                kfree(mouse);
 226        }
 227}
 228
 229static struct usb_device_id usb_mouse_id_table [] = {
 230        { USB_INTERFACE_INFO(USB_INTERFACE_CLASS_HID, USB_INTERFACE_SUBCLASS_BOOT,
 231                USB_INTERFACE_PROTOCOL_MOUSE) },
 232        { }     /* Terminating entry */
 233};
 234
 235MODULE_DEVICE_TABLE (usb, usb_mouse_id_table);
 236
 237static struct usb_driver usb_mouse_driver = {
 238        .name           = "usbmouse",
 239        .probe          = usb_mouse_probe,
 240        .disconnect     = usb_mouse_disconnect,
 241        .id_table       = usb_mouse_id_table,
 242};
 243
 244static int __init usb_mouse_init(void)
 245{
 246        int retval = usb_register(&usb_mouse_driver);
 247        if (retval == 0)
 248                printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
 249                                DRIVER_DESC "\n");
 250        return retval;
 251}
 252
 253static void __exit usb_mouse_exit(void)
 254{
 255        usb_deregister(&usb_mouse_driver);
 256}
 257
 258module_init(usb_mouse_init);
 259module_exit(usb_mouse_exit);
 260