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Linux/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);
246 

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