drivers/hid/usbhid/usbmouse.c

   1 /*
   2  * $Id: usbmouse.c,v 1.15 2001/12/27 10:37:41 vojtech Exp $
   3  *
   4  *  Copyright (c) 1999-2001 Vojtech Pavlik
   5  *
   6  *  USB HIDBP Mouse support
   7  */
   8
   9 /*
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  23  *
  24  * Should you need to contact me, the author, you can do so either by
  25  * e-mail - mail your message to <vojtech@ucw.cz>, or by paper mail:
  26  * Vojtech Pavlik, Simunkova 1594, Prague 8, 182 00 Czech Republic
  27  */
  28
  29 #include <linux/kernel.h>
  30 #include <linux/slab.h>
  31 #include <linux/module.h>
  32 #include <linux/init.h>
  33 #include <linux/usb/input.h>
  34 #include <linux/hid.h>
  35
  36 /*
  37  * Version Information
  38  */
  39 #define DRIVER_VERSION "v1.6"
  40 #define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@ucw.cz>"
  41 #define DRIVER_DESC "USB HID Boot Protocol mouse driver"
  42 #define DRIVER_LICENSE "GPL"
  43
  44 MODULE_AUTHOR(DRIVER_AUTHOR);
  45 MODULE_DESCRIPTION(DRIVER_DESC);
  46 MODULE_LICENSE(DRIVER_LICENSE);
  47
  48 struct usb_mouse {
  49         char name[128];
  50         char phys[64];
  51         struct usb_device *usbdev;
  52         struct input_dev *dev;
  53         struct urb *irq;
  54
  55         signed char *data;
  56         dma_addr_t data_dma;
  57 };
  58
  59 static void usb_mouse_irq(struct urb *urb)
  60 {
  61         struct usb_mouse *mouse = urb->context;
  62         signed char *data = mouse->data;
  63         struct input_dev *dev = mouse->dev;
  64         int status;
  65
  66         switch (urb->status) {
  67         case 0:                 /* success */
  68                 break;
  69         case -ECONNRESET:       /* unlink */
  70         case -ENOENT:
  71         case -ESHUTDOWN:
  72                 return;
  73         /* -EPIPE:  should clear the halt */
  74         default:                /* error */
  75                 goto resubmit;
  76         }
  77
  78         input_report_key(dev, BTN_LEFT,   data[0] & 0x01);
  79         input_report_key(dev, BTN_RIGHT,  data[0] & 0x02);
  80         input_report_key(dev, BTN_MIDDLE, data[0] & 0x04);
  81         input_report_key(dev, BTN_SIDE,   data[0] & 0x08);
  82         input_report_key(dev, BTN_EXTRA,  data[0] & 0x10);
  83
  84         input_report_rel(dev, REL_X,     data[1]);
  85         input_report_rel(dev, REL_Y,     data[2]);
  86         input_report_rel(dev, REL_WHEEL, data[3]);
  87
  88         input_sync(dev);
  89 resubmit:
  90         status = usb_submit_urb (urb, GFP_ATOMIC);
  91         if (status)
  92                 err ("can't resubmit intr, %s-%s/input0, status %d",
  93                                 mouse->usbdev->bus->bus_name,
  94                                 mouse->usbdev->devpath, status);
  95 }
  96
  97 static int usb_mouse_open(struct input_dev *dev)
  98 {
  99         struct usb_mouse *mouse = dev->private;
 100
 101         mouse->irq->dev = mouse->usbdev;
 102         if (usb_submit_urb(mouse->irq, GFP_KERNEL))
 103                 return -EIO;
 104
 105         return 0;
 106 }
 107
 108 static void usb_mouse_close(struct input_dev *dev)
 109 {
 110         struct usb_mouse *mouse = dev->private;
 111
 112         usb_kill_urb(mouse->irq);
 113 }
 114
 115 static int usb_mouse_probe(struct usb_interface *intf, const struct usb_device_id *id)
 116 {
 117         struct usb_device *dev = interface_to_usbdev(intf);
 118         struct usb_host_interface *interface;
 119         struct usb_endpoint_descriptor *endpoint;
 120         struct usb_mouse *mouse;
 121         struct input_dev *input_dev;
 122         int pipe, maxp;
 123         int error = -ENOMEM;
 124
 125         interface = intf->cur_altsetting;
 126
 127         if (interface->desc.bNumEndpoints != 1)
 128                 return -ENODEV;
 129
 130         endpoint = &interface->endpoint[0].desc;
 131         if (!usb_endpoint_is_int_in(endpoint))
 132                 return -ENODEV;
 133
 134         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
 135         maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
 136
 137         mouse = kzalloc(sizeof(struct usb_mouse), GFP_KERNEL);
 138         input_dev = input_allocate_device();
 139         if (!mouse || !input_dev)
 140                 goto fail1;
 141
 142         mouse->data = usb_buffer_alloc(dev, 8, GFP_ATOMIC, &mouse->data_dma);
 143         if (!mouse->data)
 144                 goto fail1;
 145
 146         mouse->irq = usb_alloc_urb(0, GFP_KERNEL);
 147         if (!mouse->irq)
 148                 goto fail2;
 149
 150         mouse->usbdev = dev;
 151         mouse->dev = input_dev;
 152
 153         if (dev->manufacturer)
 154                 strlcpy(mouse->name, dev->manufacturer, sizeof(mouse->name));
 155
 156         if (dev->product) {
 157                 if (dev->manufacturer)
 158                         strlcat(mouse->name, " ", sizeof(mouse->name));
 159                 strlcat(mouse->name, dev->product, sizeof(mouse->name));
 160         }
 161
 162         if (!strlen(mouse->name))
 163                 snprintf(mouse->name, sizeof(mouse->name),
 164                          "USB HIDBP Mouse %04x:%04x",
 165                          le16_to_cpu(dev->descriptor.idVendor),
 166                          le16_to_cpu(dev->descriptor.idProduct));
 167
 168         usb_make_path(dev, mouse->phys, sizeof(mouse->phys));
 169         strlcat(mouse->phys, "/input0", sizeof(mouse->phys));
 170
 171         input_dev->name = mouse->name;
 172         input_dev->phys = mouse->phys;
 173         usb_to_input_id(dev, &input_dev->id);
 174         input_dev->cdev.dev = &intf->dev;
 175
 176         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_REL);
 177         input_dev->keybit[LONG(BTN_MOUSE)] = BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE);
 178         input_dev->relbit[0] = BIT(REL_X) | BIT(REL_Y);
 179         input_dev->keybit[LONG(BTN_MOUSE)] |= BIT(BTN_SIDE) | BIT(BTN_EXTRA);
 180         input_dev->relbit[0] |= BIT(REL_WHEEL);
 181
 182         input_dev->private = mouse;
 183         input_dev->open = usb_mouse_open;
 184         input_dev->close = usb_mouse_close;
 185
 186         usb_fill_int_urb(mouse->irq, dev, pipe, mouse->data,
 187                          (maxp > 8 ? 8 : maxp),
 188                          usb_mouse_irq, mouse, endpoint->bInterval);
 189         mouse->irq->transfer_dma = mouse->data_dma;
 190         mouse->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 191
 192         error = input_register_device(mouse->dev);
 193         if (error)
 194                 goto fail3;
 195
 196         usb_set_intfdata(intf, mouse);
 197         return 0;
 198
 199 fail3:
 200         usb_free_urb(mouse->irq);
 201 fail2:
 202         usb_buffer_free(dev, 8, mouse->data, mouse->data_dma);
 203 fail1:
 204         input_free_device(input_dev);
 205         kfree(mouse);
 206         return error;
 207 }
 208
 209 static void usb_mouse_disconnect(struct usb_interface *intf)
 210 {
 211         struct usb_mouse *mouse = usb_get_intfdata (intf);
 212
 213         usb_set_intfdata(intf, NULL);
 214         if (mouse) {
 215                 usb_kill_urb(mouse->irq);
 216                 input_unregister_device(mouse->dev);
 217                 usb_free_urb(mouse->irq);
 218                 usb_buffer_free(interface_to_usbdev(intf), 8, mouse->data, mouse->data_dma);
 219                 kfree(mouse);
 220         }
 221 }
 222
 223 static struct usb_device_id usb_mouse_id_table [] = {
 224         { USB_INTERFACE_INFO(USB_INTERFACE_CLASS_HID, USB_INTERFACE_SUBCLASS_BOOT,
 225                 USB_INTERFACE_PROTOCOL_MOUSE) },
 226         { }     /* Terminating entry */
 227 };
 228
 229 MODULE_DEVICE_TABLE (usb, usb_mouse_id_table);
 230
 231 static struct usb_driver usb_mouse_driver = {
 232         .name           = "usbmouse",
 233         .probe          = usb_mouse_probe,
 234         .disconnect     = usb_mouse_disconnect,
 235         .id_table       = usb_mouse_id_table,
 236 };
 237
 238 static int __init usb_mouse_init(void)
 239 {
 240         int retval = usb_register(&usb_mouse_driver);
 241         if (retval == 0)
 242                 info(DRIVER_VERSION ":" DRIVER_DESC);
 243         return retval;
 244 }
 245
 246 static void __exit usb_mouse_exit(void)
 247 {
 248         usb_deregister(&usb_mouse_driver);
 249 }
 250
 251 module_init(usb_mouse_init);
 252 module_exit(usb_mouse_exit);