kernel/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                 dev_err(&mouse->usbdev->dev,
  96                         "can't resubmit intr, %s-%s/input0, status %d\n",
  97                         mouse->usbdev->bus->bus_name,
  98                         mouse->usbdev->devpath, status);
  99 }
 100
 101 static int usb_mouse_open(struct input_dev *dev)
 102 {
 103         struct usb_mouse *mouse = input_get_drvdata(dev);
 104
 105         mouse->irq->dev = mouse->usbdev;
 106         if (usb_submit_urb(mouse->irq, GFP_KERNEL))
 107                 return -EIO;
 108
 109         return 0;
 110 }
 111
 112 static void usb_mouse_close(struct input_dev *dev)
 113 {
 114         struct usb_mouse *mouse = input_get_drvdata(dev);
 115
 116         usb_kill_urb(mouse->irq);
 117 }
 118
 119 static int usb_mouse_probe(struct usb_interface *intf, const struct usb_device_id *id)
 120 {
 121         struct usb_device *dev = interface_to_usbdev(intf);
 122         struct usb_host_interface *interface;
 123         struct usb_endpoint_descriptor *endpoint;
 124         struct usb_mouse *mouse;
 125         struct input_dev *input_dev;
 126         int pipe, maxp;
 127         int error = -ENOMEM;
 128
 129         interface = intf->cur_altsetting;
 130
 131         if (interface->desc.bNumEndpoints != 1)
 132                 return -ENODEV;
 133
 134         endpoint = &interface->endpoint[0].desc;
 135         if (!usb_endpoint_is_int_in(endpoint))
 136                 return -ENODEV;
 137
 138         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
 139         maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
 140
 141         mouse = kzalloc(sizeof(struct usb_mouse), GFP_KERNEL);
 142         input_dev = input_allocate_device();
 143         if (!mouse || !input_dev)
 144                 goto fail1;
 145
 146         mouse->data = usb_alloc_coherent(dev, 8, GFP_ATOMIC, &mouse->data_dma);
 147         if (!mouse->data)
 148                 goto fail1;
 149
 150         mouse->irq = usb_alloc_urb(0, GFP_KERNEL);
 151         if (!mouse->irq)
 152                 goto fail2;
 153
 154         mouse->usbdev = dev;
 155         mouse->dev = input_dev;
 156
 157         if (dev->manufacturer)
 158                 strlcpy(mouse->name, dev->manufacturer, sizeof(mouse->name));
 159
 160         if (dev->product) {
 161                 if (dev->manufacturer)
 162                         strlcat(mouse->name, " ", sizeof(mouse->name));
 163                 strlcat(mouse->name, dev->product, sizeof(mouse->name));
 164         }
 165
 166         if (!strlen(mouse->name))
 167                 snprintf(mouse->name, sizeof(mouse->name),
 168                          "USB HIDBP Mouse %04x:%04x",
 169                          le16_to_cpu(dev->descriptor.idVendor),
 170                          le16_to_cpu(dev->descriptor.idProduct));
 171
 172         usb_make_path(dev, mouse->phys, sizeof(mouse->phys));
 173         strlcat(mouse->phys, "/input0", sizeof(mouse->phys));
 174
 175         input_dev->name = mouse->name;
 176         input_dev->phys = mouse->phys;
 177         usb_to_input_id(dev, &input_dev->id);
 178         input_dev->dev.parent = &intf->dev;
 179
 180         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_REL);
 181         input_dev->keybit[BIT_WORD(BTN_MOUSE)] = BIT_MASK(BTN_LEFT) |
 182                 BIT_MASK(BTN_RIGHT) | BIT_MASK(BTN_MIDDLE);
 183         input_dev->relbit[0] = BIT_MASK(REL_X) | BIT_MASK(REL_Y);
 184         input_dev->keybit[BIT_WORD(BTN_MOUSE)] |= BIT_MASK(BTN_SIDE) |
 185                 BIT_MASK(BTN_EXTRA);
 186         input_dev->relbit[0] |= BIT_MASK(REL_WHEEL);
 187
 188         input_set_drvdata(input_dev, mouse);
 189
 190         input_dev->open = usb_mouse_open;
 191         input_dev->close = usb_mouse_close;
 192
 193         usb_fill_int_urb(mouse->irq, dev, pipe, mouse->data,
 194                          (maxp > 8 ? 8 : maxp),
 195                          usb_mouse_irq, mouse, endpoint->bInterval);
 196         mouse->irq->transfer_dma = mouse->data_dma;
 197         mouse->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
 198
 199         error = input_register_device(mouse->dev);
 200         if (error)
 201                 goto fail3;
 202
 203         usb_set_intfdata(intf, mouse);
 204         return 0;
 205
 206 fail3:
 207         usb_free_urb(mouse->irq);
 208 fail2:
 209         usb_free_coherent(dev, 8, mouse->data, mouse->data_dma);
 210 fail1:
 211         input_free_device(input_dev);
 212         kfree(mouse);
 213         return error;
 214 }
 215
 216 static void usb_mouse_disconnect(struct usb_interface *intf)
 217 {
 218         struct usb_mouse *mouse = usb_get_intfdata (intf);
 219
 220         usb_set_intfdata(intf, NULL);
 221         if (mouse) {
 222                 usb_kill_urb(mouse->irq);
 223                 input_unregister_device(mouse->dev);
 224                 usb_free_urb(mouse->irq);
 225                 usb_free_coherent(interface_to_usbdev(intf), 8, mouse->data, mouse->data_dma);
 226                 kfree(mouse);
 227         }
 228 }
 229
 230 static struct usb_device_id usb_mouse_id_table [] = {
 231         { USB_INTERFACE_INFO(USB_INTERFACE_CLASS_HID, USB_INTERFACE_SUBCLASS_BOOT,
 232                 USB_INTERFACE_PROTOCOL_MOUSE) },
 233         { }     /* Terminating entry */
 234 };
 235
 236 MODULE_DEVICE_TABLE (usb, usb_mouse_id_table);
 237
 238 static struct usb_driver usb_mouse_driver = {
 239         .name           = "usbmouse",
 240         .probe          = usb_mouse_probe,
 241         .disconnect     = usb_mouse_disconnect,
 242         .id_table       = usb_mouse_id_table,
 243 };
 244
 245 module_usb_driver(usb_mouse_driver);