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acecad.c
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1 /*
2  * Copyright (c) 2001-2005 Edouard TISSERANT <[email protected]>
3  * Copyright (c) 2004-2005 Stephane VOLTZ <[email protected]>
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 <[email protected]>"
41 
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;
55  struct input_dev *input;
56  struct urb *irq;
57 
58  unsigned char *data;
60 };
61 
62 static void usb_acecad_irq(struct urb *urb)
63 {
64  struct usb_acecad *acecad = urb->context;
65  unsigned char *data = acecad->data;
66  struct input_dev *dev = acecad->input;
67  struct usb_interface *intf = acecad->intf;
68  int prox, status;
69 
70  switch (urb->status) {
71  case 0:
72  /* success */
73  break;
74  case -ECONNRESET:
75  case -ENOENT:
76  case -ESHUTDOWN:
77  /* this urb is terminated, clean up */
78  dev_dbg(&intf->dev, "%s - urb shutting down with status: %d\n",
79  __func__, urb->status);
80  return;
81  default:
82  dev_dbg(&intf->dev, "%s - nonzero urb status received: %d\n",
83  __func__, urb->status);
84  goto resubmit;
85  }
86 
87  prox = (data[0] & 0x04) >> 2;
88  input_report_key(dev, BTN_TOOL_PEN, prox);
89 
90  if (prox) {
91  int x = data[1] | (data[2] << 8);
92  int y = data[3] | (data[4] << 8);
93  /* Pressure should compute the same way for flair and 302 */
94  int pressure = data[5] | (data[6] << 8);
95  int touch = data[0] & 0x01;
96  int stylus = (data[0] & 0x10) >> 4;
97  int stylus2 = (data[0] & 0x20) >> 5;
98  input_report_abs(dev, ABS_X, x);
99  input_report_abs(dev, ABS_Y, y);
100  input_report_abs(dev, ABS_PRESSURE, pressure);
101  input_report_key(dev, BTN_TOUCH, touch);
102  input_report_key(dev, BTN_STYLUS, stylus);
103  input_report_key(dev, BTN_STYLUS2, stylus2);
104  }
105 
106  /* event termination */
107  input_sync(dev);
108 
109 resubmit:
110  status = usb_submit_urb(urb, GFP_ATOMIC);
111  if (status)
112  dev_err(&intf->dev,
113  "can't resubmit intr, %s-%s/input0, status %d\n",
114  acecad->usbdev->bus->bus_name,
115  acecad->usbdev->devpath, status);
116 }
117 
118 static int usb_acecad_open(struct input_dev *dev)
119 {
120  struct usb_acecad *acecad = input_get_drvdata(dev);
121 
122  acecad->irq->dev = acecad->usbdev;
123  if (usb_submit_urb(acecad->irq, GFP_KERNEL))
124  return -EIO;
125 
126  return 0;
127 }
128 
129 static void usb_acecad_close(struct input_dev *dev)
130 {
131  struct usb_acecad *acecad = input_get_drvdata(dev);
132 
133  usb_kill_urb(acecad->irq);
134 }
135 
136 static int usb_acecad_probe(struct usb_interface *intf, const struct usb_device_id *id)
137 {
138  struct usb_device *dev = interface_to_usbdev(intf);
139  struct usb_host_interface *interface = intf->cur_altsetting;
141  struct usb_acecad *acecad;
142  struct input_dev *input_dev;
143  int pipe, maxp;
144  int err;
145 
146  if (interface->desc.bNumEndpoints != 1)
147  return -ENODEV;
148 
149  endpoint = &interface->endpoint[0].desc;
150 
151  if (!usb_endpoint_is_int_in(endpoint))
152  return -ENODEV;
153 
154  pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
155  maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
156 
157  acecad = kzalloc(sizeof(struct usb_acecad), GFP_KERNEL);
158  input_dev = input_allocate_device();
159  if (!acecad || !input_dev) {
160  err = -ENOMEM;
161  goto fail1;
162  }
163 
164  acecad->data = usb_alloc_coherent(dev, 8, GFP_KERNEL, &acecad->data_dma);
165  if (!acecad->data) {
166  err= -ENOMEM;
167  goto fail1;
168  }
169 
170  acecad->irq = usb_alloc_urb(0, GFP_KERNEL);
171  if (!acecad->irq) {
172  err = -ENOMEM;
173  goto fail2;
174  }
175 
176  acecad->usbdev = dev;
177  acecad->intf = intf;
178  acecad->input = input_dev;
179 
180  if (dev->manufacturer)
181  strlcpy(acecad->name, dev->manufacturer, sizeof(acecad->name));
182 
183  if (dev->product) {
184  if (dev->manufacturer)
185  strlcat(acecad->name, " ", sizeof(acecad->name));
186  strlcat(acecad->name, dev->product, sizeof(acecad->name));
187  }
188 
189  usb_make_path(dev, acecad->phys, sizeof(acecad->phys));
190  strlcat(acecad->phys, "/input0", sizeof(acecad->phys));
191 
192  input_dev->name = acecad->name;
193  input_dev->phys = acecad->phys;
194  usb_to_input_id(dev, &input_dev->id);
195  input_dev->dev.parent = &intf->dev;
196 
197  input_set_drvdata(input_dev, acecad);
198 
199  input_dev->open = usb_acecad_open;
200  input_dev->close = usb_acecad_close;
201 
202  input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
203  input_dev->keybit[BIT_WORD(BTN_DIGI)] = BIT_MASK(BTN_TOOL_PEN) |
206 
207  switch (id->driver_info) {
208  case 0:
209  input_set_abs_params(input_dev, ABS_X, 0, 5000, 4, 0);
210  input_set_abs_params(input_dev, ABS_Y, 0, 3750, 4, 0);
211  input_set_abs_params(input_dev, ABS_PRESSURE, 0, 512, 0, 0);
212  if (!strlen(acecad->name))
213  snprintf(acecad->name, sizeof(acecad->name),
214  "USB Acecad Flair Tablet %04x:%04x",
215  le16_to_cpu(dev->descriptor.idVendor),
216  le16_to_cpu(dev->descriptor.idProduct));
217  break;
218 
219  case 1:
220  input_set_abs_params(input_dev, ABS_X, 0, 53000, 4, 0);
221  input_set_abs_params(input_dev, ABS_Y, 0, 2250, 4, 0);
222  input_set_abs_params(input_dev, ABS_PRESSURE, 0, 1024, 0, 0);
223  if (!strlen(acecad->name))
224  snprintf(acecad->name, sizeof(acecad->name),
225  "USB Acecad 302 Tablet %04x:%04x",
226  le16_to_cpu(dev->descriptor.idVendor),
227  le16_to_cpu(dev->descriptor.idProduct));
228  break;
229  }
230 
231  usb_fill_int_urb(acecad->irq, dev, pipe,
232  acecad->data, maxp > 8 ? 8 : maxp,
233  usb_acecad_irq, acecad, endpoint->bInterval);
234  acecad->irq->transfer_dma = acecad->data_dma;
235  acecad->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
236 
237  err = input_register_device(acecad->input);
238  if (err)
239  goto fail3;
240 
241  usb_set_intfdata(intf, acecad);
242 
243  return 0;
244 
245  fail3: usb_free_urb(acecad->irq);
246  fail2: usb_free_coherent(dev, 8, acecad->data, acecad->data_dma);
247  fail1: input_free_device(input_dev);
248  kfree(acecad);
249  return err;
250 }
251 
252 static void usb_acecad_disconnect(struct usb_interface *intf)
253 {
254  struct usb_acecad *acecad = usb_get_intfdata(intf);
255 
256  usb_set_intfdata(intf, NULL);
257 
258  input_unregister_device(acecad->input);
259  usb_free_urb(acecad->irq);
260  usb_free_coherent(acecad->usbdev, 8, acecad->data, acecad->data_dma);
261  kfree(acecad);
262 }
263 
264 static struct usb_device_id usb_acecad_id_table [] = {
265  { USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_FLAIR), .driver_info = 0 },
266  { USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_302), .driver_info = 1 },
267  { }
268 };
269 
270 MODULE_DEVICE_TABLE(usb, usb_acecad_id_table);
271 
272 static struct usb_driver usb_acecad_driver = {
273  .name = "usb_acecad",
274  .probe = usb_acecad_probe,
275  .disconnect = usb_acecad_disconnect,
276  .id_table = usb_acecad_id_table,
277 };
278 
279 module_usb_driver(usb_acecad_driver);