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Linux/drivers/input/tablet/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/usb/input.h>
 32 
 33 /*
 34  * Version Information
 35  */
 36 #define DRIVER_VERSION "v3.2"
 37 #define DRIVER_DESC    "USB Acecad Flair tablet driver"
 38 #define DRIVER_LICENSE "GPL"
 39 #define DRIVER_AUTHOR  "Edouard TISSERANT <edouard.tisserant@wanadoo.fr>"
 40 
 41 MODULE_AUTHOR(DRIVER_AUTHOR);
 42 MODULE_DESCRIPTION(DRIVER_DESC);
 43 MODULE_LICENSE(DRIVER_LICENSE);
 44 
 45 #define USB_VENDOR_ID_ACECAD    0x0460
 46 #define USB_DEVICE_ID_FLAIR     0x0004
 47 #define USB_DEVICE_ID_302       0x0008
 48 
 49 struct usb_acecad {
 50         char name[128];
 51         char phys[64];
 52         struct usb_device *usbdev;
 53         struct usb_interface *intf;
 54         struct input_dev *input;
 55         struct urb *irq;
 56 
 57         unsigned 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         struct usb_interface *intf = acecad->intf;
 67         int prox, status;
 68 
 69         switch (urb->status) {
 70         case 0:
 71                 /* success */
 72                 break;
 73         case -ECONNRESET:
 74         case -ENOENT:
 75         case -ESHUTDOWN:
 76                 /* this urb is terminated, clean up */
 77                 dev_dbg(&intf->dev, "%s - urb shutting down with status: %d\n",
 78                         __func__, urb->status);
 79                 return;
 80         default:
 81                 dev_dbg(&intf->dev, "%s - nonzero urb status received: %d\n",
 82                         __func__, urb->status);
 83                 goto resubmit;
 84         }
 85 
 86         prox = (data[0] & 0x04) >> 2;
 87         input_report_key(dev, BTN_TOOL_PEN, prox);
 88 
 89         if (prox) {
 90                 int x = data[1] | (data[2] << 8);
 91                 int y = data[3] | (data[4] << 8);
 92                 /* Pressure should compute the same way for flair and 302 */
 93                 int pressure = data[5] | (data[6] << 8);
 94                 int touch = data[0] & 0x01;
 95                 int stylus = (data[0] & 0x10) >> 4;
 96                 int stylus2 = (data[0] & 0x20) >> 5;
 97                 input_report_abs(dev, ABS_X, x);
 98                 input_report_abs(dev, ABS_Y, y);
 99                 input_report_abs(dev, ABS_PRESSURE, pressure);
100                 input_report_key(dev, BTN_TOUCH, touch);
101                 input_report_key(dev, BTN_STYLUS, stylus);
102                 input_report_key(dev, BTN_STYLUS2, stylus2);
103         }
104 
105         /* event termination */
106         input_sync(dev);
107 
108 resubmit:
109         status = usb_submit_urb(urb, GFP_ATOMIC);
110         if (status)
111                 dev_err(&intf->dev,
112                         "can't resubmit intr, %s-%s/input0, status %d\n",
113                         acecad->usbdev->bus->bus_name,
114                         acecad->usbdev->devpath, status);
115 }
116 
117 static int usb_acecad_open(struct input_dev *dev)
118 {
119         struct usb_acecad *acecad = input_get_drvdata(dev);
120 
121         acecad->irq->dev = acecad->usbdev;
122         if (usb_submit_urb(acecad->irq, GFP_KERNEL))
123                 return -EIO;
124 
125         return 0;
126 }
127 
128 static void usb_acecad_close(struct input_dev *dev)
129 {
130         struct usb_acecad *acecad = input_get_drvdata(dev);
131 
132         usb_kill_urb(acecad->irq);
133 }
134 
135 static int usb_acecad_probe(struct usb_interface *intf, const struct usb_device_id *id)
136 {
137         struct usb_device *dev = interface_to_usbdev(intf);
138         struct usb_host_interface *interface = intf->cur_altsetting;
139         struct usb_endpoint_descriptor *endpoint;
140         struct usb_acecad *acecad;
141         struct input_dev *input_dev;
142         int pipe, maxp;
143         int err;
144 
145         if (interface->desc.bNumEndpoints != 1)
146                 return -ENODEV;
147 
148         endpoint = &interface->endpoint[0].desc;
149 
150         if (!usb_endpoint_is_int_in(endpoint))
151                 return -ENODEV;
152 
153         pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress);
154         maxp = usb_maxpacket(dev, pipe, usb_pipeout(pipe));
155 
156         acecad = kzalloc(sizeof(struct usb_acecad), GFP_KERNEL);
157         input_dev = input_allocate_device();
158         if (!acecad || !input_dev) {
159                 err = -ENOMEM;
160                 goto fail1;
161         }
162 
163         acecad->data = usb_alloc_coherent(dev, 8, GFP_KERNEL, &acecad->data_dma);
164         if (!acecad->data) {
165                 err= -ENOMEM;
166                 goto fail1;
167         }
168 
169         acecad->irq = usb_alloc_urb(0, GFP_KERNEL);
170         if (!acecad->irq) {
171                 err = -ENOMEM;
172                 goto fail2;
173         }
174 
175         acecad->usbdev = dev;
176         acecad->intf = intf;
177         acecad->input = input_dev;
178 
179         if (dev->manufacturer)
180                 strlcpy(acecad->name, dev->manufacturer, sizeof(acecad->name));
181 
182         if (dev->product) {
183                 if (dev->manufacturer)
184                         strlcat(acecad->name, " ", sizeof(acecad->name));
185                 strlcat(acecad->name, dev->product, sizeof(acecad->name));
186         }
187 
188         usb_make_path(dev, acecad->phys, sizeof(acecad->phys));
189         strlcat(acecad->phys, "/input0", sizeof(acecad->phys));
190 
191         input_dev->name = acecad->name;
192         input_dev->phys = acecad->phys;
193         usb_to_input_id(dev, &input_dev->id);
194         input_dev->dev.parent = &intf->dev;
195 
196         input_set_drvdata(input_dev, acecad);
197 
198         input_dev->open = usb_acecad_open;
199         input_dev->close = usb_acecad_close;
200 
201         input_dev->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
202         input_dev->keybit[BIT_WORD(BTN_DIGI)] = BIT_MASK(BTN_TOOL_PEN) |
203                 BIT_MASK(BTN_TOUCH) | BIT_MASK(BTN_STYLUS) |
204                 BIT_MASK(BTN_STYLUS2);
205 
206         switch (id->driver_info) {
207         case 0:
208                 input_set_abs_params(input_dev, ABS_X, 0, 5000, 4, 0);
209                 input_set_abs_params(input_dev, ABS_Y, 0, 3750, 4, 0);
210                 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 512, 0, 0);
211                 if (!strlen(acecad->name))
212                         snprintf(acecad->name, sizeof(acecad->name),
213                                 "USB Acecad Flair Tablet %04x:%04x",
214                                 le16_to_cpu(dev->descriptor.idVendor),
215                                 le16_to_cpu(dev->descriptor.idProduct));
216                 break;
217 
218         case 1:
219                 input_set_abs_params(input_dev, ABS_X, 0, 53000, 4, 0);
220                 input_set_abs_params(input_dev, ABS_Y, 0, 2250, 4, 0);
221                 input_set_abs_params(input_dev, ABS_PRESSURE, 0, 1024, 0, 0);
222                 if (!strlen(acecad->name))
223                         snprintf(acecad->name, sizeof(acecad->name),
224                                 "USB Acecad 302 Tablet %04x:%04x",
225                                 le16_to_cpu(dev->descriptor.idVendor),
226                                 le16_to_cpu(dev->descriptor.idProduct));
227                 break;
228         }
229 
230         usb_fill_int_urb(acecad->irq, dev, pipe,
231                         acecad->data, maxp > 8 ? 8 : maxp,
232                         usb_acecad_irq, acecad, endpoint->bInterval);
233         acecad->irq->transfer_dma = acecad->data_dma;
234         acecad->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
235 
236         err = input_register_device(acecad->input);
237         if (err)
238                 goto fail3;
239 
240         usb_set_intfdata(intf, acecad);
241 
242         return 0;
243 
244  fail3: usb_free_urb(acecad->irq);
245  fail2: usb_free_coherent(dev, 8, acecad->data, acecad->data_dma);
246  fail1: input_free_device(input_dev);
247         kfree(acecad);
248         return err;
249 }
250 
251 static void usb_acecad_disconnect(struct usb_interface *intf)
252 {
253         struct usb_acecad *acecad = usb_get_intfdata(intf);
254 
255         usb_set_intfdata(intf, NULL);
256 
257         input_unregister_device(acecad->input);
258         usb_free_urb(acecad->irq);
259         usb_free_coherent(acecad->usbdev, 8, acecad->data, acecad->data_dma);
260         kfree(acecad);
261 }
262 
263 static struct usb_device_id usb_acecad_id_table [] = {
264         { USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_FLAIR), .driver_info = 0 },
265         { USB_DEVICE(USB_VENDOR_ID_ACECAD, USB_DEVICE_ID_302),   .driver_info = 1 },
266         { }
267 };
268 
269 MODULE_DEVICE_TABLE(usb, usb_acecad_id_table);
270 
271 static struct usb_driver usb_acecad_driver = {
272         .name =         "usb_acecad",
273         .probe =        usb_acecad_probe,
274         .disconnect =   usb_acecad_disconnect,
275         .id_table =     usb_acecad_id_table,
276 };
277 
278 module_usb_driver(usb_acecad_driver);
279 

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