drivers/usb/input/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
  35 /*
  36  * Version Information
  37  */
  38 #define DRIVER_VERSION "v1.6"
  39 #define DRIVER_AUTHOR "Vojtech Pavlik <vojtech@ucw.cz>"
  40 #define DRIVER_DESC "USB HID Boot Protocol mouse driver"
  41 #define DRIVER_LICENSE "GPL"
  42
  43 MODULE_AUTHOR(DRIVER_AUTHOR);
  44 MODULE_DESCRIPTION(DRIVER_DESC);
  45 MODULE_LICENSE(DRIVER_LICENSE);
  46
  47 struct usb_mouse {
  48         char name[128];
  49         char phys[64];
  50         struct usb_device *usbdev;
  51         struct input_dev *dev;
  52         struct urb *irq;
  53
  54         signed char *data;
  55         dma_addr_t data_dma;
  56 };
  57
  58 static void usb_mouse_irq(struct urb *urb)
  59 {
  60         struct usb_mouse *mouse = urb->context;
  61         signed char *data = mouse->data;
  62         struct input_dev *dev = mouse->dev;
  63         int status;
  64
  65         switch (urb->status) {
  66         case 0:                 /* success */
  67                 break;
  68         case -ECONNRESET:       /* unlink */
  69         case -ENOENT:
  70         case -ESHUTDOWN:
  71                 return;
  72         /* -EPIPE:  should clear the halt */
  73         default:                /* error */
  74                 goto resubmit;
  75         }
  76
  77         input_report_key(dev, BTN_LEFT,   data[0] & 0x01);
  78         input_report_key(dev, BTN_RIGHT,  data[0] & 0x02);
  79         input_report_key(dev, BTN_MIDDLE, data[0] & 0x04);
  80         input_report_key(dev, BTN_SIDE,   data[0] & 0x08);
  81         input_report_key(dev, BTN_EXTRA,  data[0] & 0x10);
  82
  83         input_report_rel(dev, REL_X,     data[1]);
  84         input_report_rel(dev, REL_Y,     data[2]);
  85         input_report_rel(dev, REL_WHEEL, data[3]);
  86
  87         input_sync(dev);
  88 resubmit:
  89         status = usb_submit_urb (urb, SLAB_ATOMIC);
  90         if (status)
  91                 err ("can't resubmit intr, %s-%s/input0, status %d",
  92                                 mouse->usbdev->bus->bus_name,
  93                                 mouse->usbdev->devpath, status);
  94 }
  95
  96 static int usb_mouse_open(struct input_dev *dev)
  97 {
  98         struct usb_mouse *mouse = dev->private;
  99
 100         mouse->irq->dev = mouse->usbdev;
 101         if (usb_submit_urb(mouse->irq, GFP_KERNEL))
 102                 return -EIO;
 103
 104         return 0;
 105 }
 106
 107 static void usb_mouse_close(struct input_dev *dev)
 108 {
 109         struct usb_mouse *mouse = dev->private;
 110
 111         usb_kill_urb(mouse->irq);
 112 }
 113
 114 static int usb_mouse_probe(struct usb_interface *intf, const struct usb_device_id *id)
 115 {
 116         struct usb_device *dev = interface_to_usbdev(intf);
 117         struct usb_host_interface *interface;
 118         struct usb_endpoint_descriptor *endpoint;
 119         struct usb_mouse *mouse;
 120         struct input_dev *input_dev;
 121         int pipe, maxp;
 122
 123         interface = intf->cur_altsetting;
 124
 125         if (interface->desc.bNumEndpoints != 1)
 126                 return -ENODEV;
 127
 128         endpoint = &interface->endpoint[0].desc;
 129         if (!(endpoint->bEndpointAddress & USB_DIR_IN))
 130                 return -ENODEV;
 131         if ((endpoint->bmAttributes & USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_INT)
 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, SLAB_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         input_register_device(mouse->dev);
 193
 194         usb_set_intfdata(intf, mouse);
 195         return 0;
 196
 197 fail2:  usb_buffer_free(dev, 8, mouse->data, mouse->data_dma);
 198 fail1:  input_free_device(input_dev);
 199         kfree(mouse);
 200         return -ENOMEM;
 201 }
 202
 203 static void usb_mouse_disconnect(struct usb_interface *intf)
 204 {
 205         struct usb_mouse *mouse = usb_get_intfdata (intf);
 206
 207         usb_set_intfdata(intf, NULL);
 208         if (mouse) {
 209                 usb_kill_urb(mouse->irq);
 210                 input_unregister_device(mouse->dev);
 211                 usb_free_urb(mouse->irq);
 212                 usb_buffer_free(interface_to_usbdev(intf), 8, mouse->data, mouse->data_dma);
 213                 kfree(mouse);
 214         }
 215 }
 216
 217 static struct usb_device_id usb_mouse_id_table [] = {
 218         { USB_INTERFACE_INFO(3, 1, 2) },
 219         { }     /* Terminating entry */
 220 };
 221
 222 MODULE_DEVICE_TABLE (usb, usb_mouse_id_table);
 223
 224 static struct usb_driver usb_mouse_driver = {
 225         .name           = "usbmouse",
 226         .probe          = usb_mouse_probe,
 227         .disconnect     = usb_mouse_disconnect,
 228         .id_table       = usb_mouse_id_table,
 229 };
 230
 231 static int __init usb_mouse_init(void)
 232 {
 233         int retval = usb_register(&usb_mouse_driver);
 234         if (retval == 0)
 235                 info(DRIVER_VERSION ":" DRIVER_DESC);
 236         return retval;
 237 }
 238
 239 static void __exit usb_mouse_exit(void)
 240 {
 241         usb_deregister(&usb_mouse_driver);
 242 }
 243
 244 module_init(usb_mouse_init);
 245 module_exit(usb_mouse_exit);