drivers/hid/usbhid/usbmouse.c

   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
  47 MODULE_AUTHOR(DRIVER_AUTHOR);
  48 MODULE_DESCRIPTION(DRIVER_DESC);
  49 MODULE_LICENSE(DRIVER_LICENSE);
  50
  51 struct 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
  62 static 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);
  92 resubmit:
  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
 100 static 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
 111 static 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
 118 static 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_buffer_alloc(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
 205 fail3:
 206         usb_free_urb(mouse->irq);
 207 fail2:
 208         usb_buffer_free(dev, 8, mouse->data, mouse->data_dma);
 209 fail1:
 210         input_free_device(input_dev);
 211         kfree(mouse);
 212         return error;
 213 }
 214
 215 static 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_buffer_free(interface_to_usbdev(intf), 8, mouse->data, mouse->data_dma);
 225                 kfree(mouse);
 226         }
 227 }
 228
 229 static 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
 235 MODULE_DEVICE_TABLE (usb, usb_mouse_id_table);
 236
 237 static 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
 244 static int __init usb_mouse_init(void)
 245 {
 246         int retval = usb_register(&usb_mouse_driver);
 247         if (retval == 0)
 248                 info(DRIVER_VERSION ":" DRIVER_DESC);
 249         return retval;
 250 }
 251
 252 static void __exit usb_mouse_exit(void)
 253 {
 254         usb_deregister(&usb_mouse_driver);
 255 }
 256
 257 module_init(usb_mouse_init);
 258 module_exit(usb_mouse_exit);