IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
[linux-2.6.git] / drivers / usb / input / acecad.c
1 /*
2  *  Copyright (c) 2001-2005 Edouard TISSERANT   <edouard.tisserant@wanadoo.fr>
3  *  Copyright (c) 2004-2005 Stephane VOLTZ      <svoltz@numericable.fr>
4  *
5  *  USB Acecad "Acecad Flair" tablet support
6  *
7  *  Changelog:
8  *      v3.2 - Added sysfs support
9  */
10
11 /*
12  * This program is free software; you can redistribute it and/or modify
13  * it under the terms of the GNU General Public License as published by
14  * the Free Software Foundation; either version 2 of the License, or
15  * (at your option) any later version.
16  *
17  * This program is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20  * GNU General Public License for more details.
21  *
22  * You should have received a copy of the GNU General Public License
23  * along with this program; if not, write to the Free Software
24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25  *
26  */
27
28 #include <linux/kernel.h>
29 #include <linux/slab.h>
30 #include <linux/module.h>
31 #include <linux/init.h>
32 #include <linux/usb/input.h>
33
34 /*
35  * Version Information
36  */
37 #define DRIVER_VERSION "v3.2"
38 #define DRIVER_DESC    "USB Acecad Flair tablet driver"
39 #define DRIVER_LICENSE "GPL"
40 #define DRIVER_AUTHOR  "Edouard TISSERANT <edouard.tisserant@wanadoo.fr>"
41
42 MODULE_AUTHOR(DRIVER_AUTHOR);
43 MODULE_DESCRIPTION(DRIVER_DESC);
44 MODULE_LICENSE(DRIVER_LICENSE);
45
46 #define USB_VENDOR_ID_ACECAD    0x0460
47 #define USB_DEVICE_ID_FLAIR     0x0004
48 #define USB_DEVICE_ID_302       0x0008
49
50 struct usb_acecad {
51         char name[128];
52         char phys[64];
53         struct usb_device *usbdev;
54         struct input_dev *input;
55         struct urb *irq;
56
57         signed char *data;
58         dma_addr_t data_dma;
59 };
60
61 static void usb_acecad_irq(struct urb *urb)
62 {
63         struct usb_acecad *acecad = urb->context;
64         unsigned char *data = acecad->data;
65         struct input_dev *dev = acecad->input;
66         int prox, status;
67
68         switch (urb->status) {
69                 case 0:
70                         /* success */
71                         break;
72                 case -ECONNRESET:
73                 case -ENOENT:
74                 case -ESHUTDOWN:
75                         /* this urb is terminated, clean up */
76                         dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
77                         return;
78                 default:
79                         dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
80                         goto resubmit;
81         }
82
83         prox = (data[0] & 0x04) >> 2;
84         input_report_key(dev, BTN_TOOL_PEN, prox);
85
86         if (prox) {
87                 int x = data[1] | (data[2] << 8);
88                 int y = data[3] | (data[4] << 8);
89                 /* Pressure should compute the same way for flair and 302 */
90                 int pressure = data[5] | (data[6] << 8);
91                 int touch = data[0] & 0x01;
92                 int stylus = (data[0] & 0x10) >> 4;
93                 int stylus2 = (data[0] & 0x20) >> 5;
94                 input_report_abs(dev, ABS_X, x);
95                 input_report_abs(dev, ABS_Y, y);
96                 input_report_abs(dev, ABS_PRESSURE, pressure);
97                 input_report_key(dev, BTN_TOUCH, touch);
98                 input_report_key(dev, BTN_STYLUS, stylus);
99                 input_report_key(dev, BTN_STYLUS2, stylus2);
100         }
101
102         /* event termination */
103         input_sync(dev);
104
105 resubmit:
106         status = usb_submit_urb(urb, GFP_ATOMIC);
107         if (status)
108                 err("can't resubmit intr, %s-%s/input0, status %d",
109                         acecad->usbdev->bus->bus_name, acecad->usbdev->devpath, status);
110 }
111
112 static int usb_acecad_open(struct input_dev *dev)
113 {
114         struct usb_acecad *acecad = dev->private;
115
116         acecad->irq->dev = acecad->usbdev;
117         if (usb_submit_urb(acecad->irq, GFP_KERNEL))
118                 return -EIO;
119
120         return 0;
121 }
122
123 static void usb_acecad_close(struct input_dev *dev)
124 {
125         struct usb_acecad *acecad = dev->private;
126
127         usb_kill_urb(acecad->irq);
128 }
129
130 static int usb_acecad_probe(struct usb_interface *intf, const struct usb_device_id *id)
131 {
132         struct usb_device *dev = interface_to_usbdev(intf);
133         struct usb_host_interface *interface = intf->cur_altsetting;
134         struct usb_endpoint_descriptor *endpoint;
135         struct usb_acecad *acecad;
136         struct input_dev *input_dev;
137         int pipe, maxp;
138
139         if (interface->desc.bNumEndpoints != 1)
140                 return -ENODEV;
141
142         endpoint = &interface->endpoint[0].desc;
143
144         if (!usb_endpoint_is_int_in(endpoint))
145                 return -ENODEV;
146
147         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
148         maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
149
150         acecad = kzalloc(sizeof(struct usb_acecad), GFP_KERNEL);
151         input_dev = input_allocate_device();
152         if (!acecad || !input_dev)
153                 goto fail1;
154
155         acecad->data = usb_buffer_alloc(dev, 8, SLAB_KERNEL, &acecad->data_dma);
156         if (!acecad->data)
157                 goto fail1;
158
159         acecad->irq = usb_alloc_urb(0, GFP_KERNEL);
160         if (!acecad->irq)
161                 goto fail2;
162
163         acecad->usbdev = dev;
164         acecad->input = input_dev;
165
166         if (dev->manufacturer)
167                 strlcpy(acecad->name, dev->manufacturer, sizeof(acecad->name));
168
169         if (dev->product) {
170                 if (dev->manufacturer)
171                         strlcat(acecad->name, " ", sizeof(acecad->name));
172                 strlcat(acecad->name, dev->product, sizeof(acecad->name));
173         }
174
175         usb_make_path(dev, acecad->phys, sizeof(acecad->phys));
176         strlcat(acecad->phys, "/input0", sizeof(acecad->phys));
177
178         input_dev->name = acecad->name;
179         input_dev->phys = acecad->phys;
180         usb_to_input_id(dev, &input_dev->id);
181         input_dev->cdev.dev = &intf->dev;
182         input_dev->private = acecad;
183
184         input_dev->open = usb_acecad_open;
185         input_dev->close = usb_acecad_close;
186
187         input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_ABS);
188         input_dev->absbit[0] = BIT(ABS_X) | BIT(ABS_Y) | BIT(ABS_PRESSURE);
189         input_dev->keybit[LONG(BTN_LEFT)] = BIT(BTN_LEFT) | BIT(BTN_RIGHT) | BIT(BTN_MIDDLE);
190         input_dev->keybit[LONG(BTN_DIGI)] = BIT(BTN_TOOL_PEN) |BIT(BTN_TOUCH) | BIT(BTN_STYLUS) | BIT(BTN_STYLUS2);
191
192         switch (id->driver_info) {
193                 case 0:
194                         input_dev->absmax[ABS_X] = 5000;
195                         input_dev->absmax[ABS_Y] = 3750;
196                         input_dev->absmax[ABS_PRESSURE] = 512;
197                         if (!strlen(acecad->name))
198                                 snprintf(acecad->name, sizeof(acecad->name),
199                                         "USB Acecad Flair Tablet %04x:%04x",
200                                         le16_to_cpu(dev->descriptor.idVendor),
201                                         le16_to_cpu(dev->descriptor.idProduct));
202                         break;
203                 case 1:
204                         input_dev->absmax[ABS_X] = 3000;
205                         input_dev->absmax[ABS_Y] = 2250;
206                         input_dev->absmax[ABS_PRESSURE] = 1024;
207                         if (!strlen(acecad->name))
208                                 snprintf(acecad->name, sizeof(acecad->name),
209                                         "USB Acecad 302 Tablet %04x:%04x",
210                                         le16_to_cpu(dev->descriptor.idVendor),
211                                         le16_to_cpu(dev->descriptor.idProduct));
212                         break;
213         }
214
215         input_dev->absfuzz[ABS_X] = 4;
216         input_dev->absfuzz[ABS_Y] = 4;
217
218         usb_fill_int_urb(acecad->irq, dev, pipe,
219                         acecad->data, maxp > 8 ? 8 : maxp,
220                         usb_acecad_irq, acecad, endpoint->bInterval);
221         acecad->irq->transfer_dma = acecad->data_dma;
222         acecad->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
223
224         input_register_device(acecad->input);
225
226         usb_set_intfdata(intf, acecad);
227
228         return 0;
229
230  fail2: usb_buffer_free(dev, 8, acecad->data, acecad->data_dma);
231  fail1: input_free_device(input_dev);
232         kfree(acecad);
233         return -ENOMEM;
234 }
235
236 static void usb_acecad_disconnect(struct usb_interface *intf)
237 {
238         struct usb_acecad *acecad = usb_get_intfdata(intf);
239
240         usb_set_intfdata(intf, NULL);
241         if (acecad) {
242                 usb_kill_urb(acecad->irq);
243                 input_unregister_device(acecad->input);
244                 usb_free_urb(acecad->irq);
245                 usb_buffer_free(interface_to_usbdev(intf), 10, acecad->data, acecad->data_dma);
246                 kfree(acecad);
247         }
248 }
249
250 static struct usb_device_id usb_acecad_id_table [] = {
251         { USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_FLAIR), .driver_info = 0 },
252         { USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_302),   .driver_info = 1 },
253         { }
254 };
255
256 MODULE_DEVICE_TABLE(usb, usb_acecad_id_table);
257
258 static struct usb_driver usb_acecad_driver = {
259         .name =         "usb_acecad",
260         .probe =        usb_acecad_probe,
261         .disconnect =   usb_acecad_disconnect,
262         .id_table =     usb_acecad_id_table,
263 };
264
265 static int __init usb_acecad_init(void)
266 {
267         int result = usb_register(&usb_acecad_driver);
268         if (result == 0)
269                 info(DRIVER_VERSION ":" DRIVER_DESC);
270         return result;
271 }
272
273 static void __exit usb_acecad_exit(void)
274 {
275         usb_deregister(&usb_acecad_driver);
276 }
277
278 module_init(usb_acecad_init);
279 module_exit(usb_acecad_exit);