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Linux/drivers/input/tablet/hanwang.c

  1 /*
  2  *  USB Hanwang tablet support
  3  *
  4  *  Copyright (c) 2010 Xing Wei <weixing@hanwang.com.cn>
  5  *
  6  */
  7 
  8 /*
  9  * This program is free software; you can redistribute it and/or modify
 10  * it under the terms of the GNU General Public License as published by
 11  * the Free Software Foundation; either version 2 of the License, or
 12  * (at your option) any later version.
 13  *
 14  * This program is distributed in the hope that it will be useful,
 15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 17  * GNU General Public License for more details.
 18  *
 19  * You should have received a copy of the GNU General Public License
 20  * along with this program; if not, write to the Free Software
 21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 22  *
 23  */
 24 
 25 #include <linux/types.h>
 26 #include <linux/kernel.h>
 27 #include <linux/slab.h>
 28 #include <linux/module.h>
 29 #include <linux/usb/input.h>
 30 
 31 #define DRIVER_AUTHOR   "Xing Wei <weixing@hanwang.com.cn>"
 32 #define DRIVER_DESC     "USB Hanwang tablet driver"
 33 #define DRIVER_LICENSE  "GPL"
 34 
 35 MODULE_AUTHOR(DRIVER_AUTHOR);
 36 MODULE_DESCRIPTION(DRIVER_DESC);
 37 MODULE_LICENSE(DRIVER_LICENSE);
 38 
 39 #define USB_VENDOR_ID_HANWANG           0x0b57
 40 #define HANWANG_TABLET_INT_CLASS        0x0003
 41 #define HANWANG_TABLET_INT_SUB_CLASS    0x0001
 42 #define HANWANG_TABLET_INT_PROTOCOL     0x0002
 43 
 44 #define ART_MASTER_PKGLEN_MAX   10
 45 
 46 /* device IDs */
 47 #define STYLUS_DEVICE_ID        0x02
 48 #define TOUCH_DEVICE_ID         0x03
 49 #define CURSOR_DEVICE_ID        0x06
 50 #define ERASER_DEVICE_ID        0x0A
 51 #define PAD_DEVICE_ID           0x0F
 52 
 53 /* match vendor and interface info  */
 54 #define HANWANG_TABLET_DEVICE(vend, cl, sc, pr) \
 55         .match_flags = USB_DEVICE_ID_MATCH_VENDOR \
 56                 | USB_DEVICE_ID_MATCH_INT_INFO, \
 57         .idVendor = (vend), \
 58         .bInterfaceClass = (cl), \
 59         .bInterfaceSubClass = (sc), \
 60         .bInterfaceProtocol = (pr)
 61 
 62 enum hanwang_tablet_type {
 63         HANWANG_ART_MASTER_III,
 64         HANWANG_ART_MASTER_HD,
 65         HANWANG_ART_MASTER_II,
 66 };
 67 
 68 struct hanwang {
 69         unsigned char *data;
 70         dma_addr_t data_dma;
 71         struct input_dev *dev;
 72         struct usb_device *usbdev;
 73         struct urb *irq;
 74         const struct hanwang_features *features;
 75         unsigned int current_tool;
 76         unsigned int current_id;
 77         char name[64];
 78         char phys[32];
 79 };
 80 
 81 struct hanwang_features {
 82         unsigned short pid;
 83         char *name;
 84         enum hanwang_tablet_type type;
 85         int pkg_len;
 86         int max_x;
 87         int max_y;
 88         int max_tilt_x;
 89         int max_tilt_y;
 90         int max_pressure;
 91 };
 92 
 93 static const struct hanwang_features features_array[] = {
 94         { 0x8528, "Hanwang Art Master III 0906", HANWANG_ART_MASTER_III,
 95           ART_MASTER_PKGLEN_MAX, 0x5757, 0x3692, 0x3f, 0x7f, 2048 },
 96         { 0x8529, "Hanwang Art Master III 0604", HANWANG_ART_MASTER_III,
 97           ART_MASTER_PKGLEN_MAX, 0x3d84, 0x2672, 0x3f, 0x7f, 2048 },
 98         { 0x852a, "Hanwang Art Master III 1308", HANWANG_ART_MASTER_III,
 99           ART_MASTER_PKGLEN_MAX, 0x7f00, 0x4f60, 0x3f, 0x7f, 2048 },
100         { 0x8401, "Hanwang Art Master HD 5012", HANWANG_ART_MASTER_HD,
101           ART_MASTER_PKGLEN_MAX, 0x678e, 0x4150, 0x3f, 0x7f, 1024 },
102         { 0x8503, "Hanwang Art Master II", HANWANG_ART_MASTER_II,
103           ART_MASTER_PKGLEN_MAX, 0x27de, 0x1cfe, 0x3f, 0x7f, 1024 },
104 };
105 
106 static const int hw_eventtypes[] = {
107         EV_KEY, EV_ABS, EV_MSC,
108 };
109 
110 static const int hw_absevents[] = {
111         ABS_X, ABS_Y, ABS_TILT_X, ABS_TILT_Y, ABS_WHEEL,
112         ABS_RX, ABS_RY, ABS_PRESSURE, ABS_MISC,
113 };
114 
115 static const int hw_btnevents[] = {
116         BTN_STYLUS, BTN_STYLUS2, BTN_TOOL_PEN, BTN_TOOL_RUBBER,
117         BTN_TOOL_MOUSE, BTN_TOOL_FINGER,
118         BTN_0, BTN_1, BTN_2, BTN_3, BTN_4, BTN_5, BTN_6, BTN_7, BTN_8,
119 };
120 
121 static const int hw_mscevents[] = {
122         MSC_SERIAL,
123 };
124 
125 static void hanwang_parse_packet(struct hanwang *hanwang)
126 {
127         unsigned char *data = hanwang->data;
128         struct input_dev *input_dev = hanwang->dev;
129         struct usb_device *dev = hanwang->usbdev;
130         enum hanwang_tablet_type type = hanwang->features->type;
131         int i;
132         u16 p;
133 
134         if (type == HANWANG_ART_MASTER_II) {
135                 hanwang->current_tool = BTN_TOOL_PEN;
136                 hanwang->current_id = STYLUS_DEVICE_ID;
137         }
138 
139         switch (data[0]) {
140         case 0x02:      /* data packet */
141                 switch (data[1]) {
142                 case 0x80:      /* tool prox out */
143                         if (type != HANWANG_ART_MASTER_II) {
144                                 hanwang->current_id = 0;
145                                 input_report_key(input_dev,
146                                                  hanwang->current_tool, 0);
147                         }
148                         break;
149 
150                 case 0x00:      /* artmaster ii pen leave */
151                         if (type == HANWANG_ART_MASTER_II) {
152                                 hanwang->current_id = 0;
153                                 input_report_key(input_dev,
154                                                  hanwang->current_tool, 0);
155                         }
156                         break;
157 
158                 case 0xc2:      /* first time tool prox in */
159                         switch (data[3] & 0xf0) {
160                         case 0x20:      /* art_master III */
161                         case 0x30:      /* art_master_HD */
162                                 hanwang->current_id = STYLUS_DEVICE_ID;
163                                 hanwang->current_tool = BTN_TOOL_PEN;
164                                 input_report_key(input_dev, BTN_TOOL_PEN, 1);
165                                 break;
166                         case 0xa0:      /* art_master III */
167                         case 0xb0:      /* art_master_HD */
168                                 hanwang->current_id = ERASER_DEVICE_ID;
169                                 hanwang->current_tool = BTN_TOOL_RUBBER;
170                                 input_report_key(input_dev, BTN_TOOL_RUBBER, 1);
171                                 break;
172                         default:
173                                 hanwang->current_id = 0;
174                                 dev_dbg(&dev->dev,
175                                         "unknown tablet tool %02x\n", data[0]);
176                                 break;
177                         }
178                         break;
179 
180                 default:        /* tool data packet */
181                         switch (type) {
182                         case HANWANG_ART_MASTER_III:
183                                 p = (data[6] << 3) |
184                                     ((data[7] & 0xc0) >> 5) |
185                                     (data[1] & 0x01);
186                                 break;
187 
188                         case HANWANG_ART_MASTER_HD:
189                         case HANWANG_ART_MASTER_II:
190                                 p = (data[7] >> 6) | (data[6] << 2);
191                                 break;
192 
193                         default:
194                                 p = 0;
195                                 break;
196                         }
197 
198                         input_report_abs(input_dev, ABS_X,
199                                          be16_to_cpup((__be16 *)&data[2]));
200                         input_report_abs(input_dev, ABS_Y,
201                                          be16_to_cpup((__be16 *)&data[4]));
202                         input_report_abs(input_dev, ABS_PRESSURE, p);
203                         input_report_abs(input_dev, ABS_TILT_X, data[7] & 0x3f);
204                         input_report_abs(input_dev, ABS_TILT_Y, data[8] & 0x7f);
205                         input_report_key(input_dev, BTN_STYLUS, data[1] & 0x02);
206 
207                         if (type != HANWANG_ART_MASTER_II)
208                                 input_report_key(input_dev, BTN_STYLUS2,
209                                                  data[1] & 0x04);
210                         else
211                                 input_report_key(input_dev, BTN_TOOL_PEN, 1);
212 
213                         break;
214                 }
215 
216                 input_report_abs(input_dev, ABS_MISC, hanwang->current_id);
217                 input_event(input_dev, EV_MSC, MSC_SERIAL,
218                                 hanwang->features->pid);
219                 break;
220 
221         case 0x0c:
222                 /* roll wheel */
223                 hanwang->current_id = PAD_DEVICE_ID;
224 
225                 switch (type) {
226                 case HANWANG_ART_MASTER_III:
227                         input_report_key(input_dev, BTN_TOOL_FINGER,
228                                          data[1] || data[2] || data[3]);
229                         input_report_abs(input_dev, ABS_WHEEL, data[1]);
230                         input_report_key(input_dev, BTN_0, data[2]);
231                         for (i = 0; i < 8; i++)
232                                 input_report_key(input_dev,
233                                          BTN_1 + i, data[3] & (1 << i));
234                         break;
235 
236                 case HANWANG_ART_MASTER_HD:
237                         input_report_key(input_dev, BTN_TOOL_FINGER, data[1] ||
238                                         data[2] || data[3] || data[4] ||
239                                         data[5] || data[6]);
240                         input_report_abs(input_dev, ABS_RX,
241                                         ((data[1] & 0x1f) << 8) | data[2]);
242                         input_report_abs(input_dev, ABS_RY,
243                                         ((data[3] & 0x1f) << 8) | data[4]);
244                         input_report_key(input_dev, BTN_0, data[5] & 0x01);
245                         for (i = 0; i < 4; i++) {
246                                 input_report_key(input_dev,
247                                          BTN_1 + i, data[5] & (1 << i));
248                                 input_report_key(input_dev,
249                                          BTN_5 + i, data[6] & (1 << i));
250                         }
251                         break;
252 
253                 case HANWANG_ART_MASTER_II:
254                         dev_dbg(&dev->dev, "error packet  %02x\n", data[0]);
255                         return;
256                 }
257 
258                 input_report_abs(input_dev, ABS_MISC, hanwang->current_id);
259                 input_event(input_dev, EV_MSC, MSC_SERIAL, 0xffffffff);
260                 break;
261 
262         default:
263                 dev_dbg(&dev->dev, "error packet  %02x\n", data[0]);
264                 break;
265         }
266 
267         input_sync(input_dev);
268 }
269 
270 static void hanwang_irq(struct urb *urb)
271 {
272         struct hanwang *hanwang = urb->context;
273         struct usb_device *dev = hanwang->usbdev;
274         int retval;
275 
276         switch (urb->status) {
277         case 0:
278                 /* success */;
279                 hanwang_parse_packet(hanwang);
280                 break;
281         case -ECONNRESET:
282         case -ENOENT:
283         case -ESHUTDOWN:
284                 /* this urb is terminated, clean up */
285                 dev_err(&dev->dev, "%s - urb shutting down with status: %d",
286                         __func__, urb->status);
287                 return;
288         default:
289                 dev_err(&dev->dev, "%s - nonzero urb status received: %d",
290                         __func__, urb->status);
291                 break;
292         }
293 
294         retval = usb_submit_urb(urb, GFP_ATOMIC);
295         if (retval)
296                 dev_err(&dev->dev, "%s - usb_submit_urb failed with result %d",
297                         __func__, retval);
298 }
299 
300 static int hanwang_open(struct input_dev *dev)
301 {
302         struct hanwang *hanwang = input_get_drvdata(dev);
303 
304         hanwang->irq->dev = hanwang->usbdev;
305         if (usb_submit_urb(hanwang->irq, GFP_KERNEL))
306                 return -EIO;
307 
308         return 0;
309 }
310 
311 static void hanwang_close(struct input_dev *dev)
312 {
313         struct hanwang *hanwang = input_get_drvdata(dev);
314 
315         usb_kill_urb(hanwang->irq);
316 }
317 
318 static bool get_features(struct usb_device *dev, struct hanwang *hanwang)
319 {
320         int i;
321 
322         for (i = 0; i < ARRAY_SIZE(features_array); i++) {
323                 if (le16_to_cpu(dev->descriptor.idProduct) ==
324                                 features_array[i].pid) {
325                         hanwang->features = &features_array[i];
326                         return true;
327                 }
328         }
329 
330         return false;
331 }
332 
333 
334 static int hanwang_probe(struct usb_interface *intf, const struct usb_device_id *id)
335 {
336         struct usb_device *dev = interface_to_usbdev(intf);
337         struct usb_endpoint_descriptor *endpoint;
338         struct hanwang *hanwang;
339         struct input_dev *input_dev;
340         int error;
341         int i;
342 
343         hanwang = kzalloc(sizeof(struct hanwang), GFP_KERNEL);
344         input_dev = input_allocate_device();
345         if (!hanwang || !input_dev) {
346                 error = -ENOMEM;
347                 goto fail1;
348         }
349 
350         if (!get_features(dev, hanwang)) {
351                 error = -ENXIO;
352                 goto fail1;
353         }
354 
355         hanwang->data = usb_alloc_coherent(dev, hanwang->features->pkg_len,
356                                         GFP_KERNEL, &hanwang->data_dma);
357         if (!hanwang->data) {
358                 error = -ENOMEM;
359                 goto fail1;
360         }
361 
362         hanwang->irq = usb_alloc_urb(0, GFP_KERNEL);
363         if (!hanwang->irq) {
364                 error = -ENOMEM;
365                 goto fail2;
366         }
367 
368         hanwang->usbdev = dev;
369         hanwang->dev = input_dev;
370 
371         usb_make_path(dev, hanwang->phys, sizeof(hanwang->phys));
372         strlcat(hanwang->phys, "/input0", sizeof(hanwang->phys));
373 
374         strlcpy(hanwang->name, hanwang->features->name, sizeof(hanwang->name));
375         input_dev->name = hanwang->name;
376         input_dev->phys = hanwang->phys;
377         usb_to_input_id(dev, &input_dev->id);
378         input_dev->dev.parent = &intf->dev;
379 
380         input_set_drvdata(input_dev, hanwang);
381 
382         input_dev->open = hanwang_open;
383         input_dev->close = hanwang_close;
384 
385         for (i = 0; i < ARRAY_SIZE(hw_eventtypes); ++i)
386                 __set_bit(hw_eventtypes[i], input_dev->evbit);
387 
388         for (i = 0; i < ARRAY_SIZE(hw_absevents); ++i)
389                 __set_bit(hw_absevents[i], input_dev->absbit);
390 
391         for (i = 0; i < ARRAY_SIZE(hw_btnevents); ++i)
392                 __set_bit(hw_btnevents[i], input_dev->keybit);
393 
394         for (i = 0; i < ARRAY_SIZE(hw_mscevents); ++i)
395                 __set_bit(hw_mscevents[i], input_dev->mscbit);
396 
397         input_set_abs_params(input_dev, ABS_X,
398                              0, hanwang->features->max_x, 4, 0);
399         input_set_abs_params(input_dev, ABS_Y,
400                              0, hanwang->features->max_y, 4, 0);
401         input_set_abs_params(input_dev, ABS_TILT_X,
402                              0, hanwang->features->max_tilt_x, 0, 0);
403         input_set_abs_params(input_dev, ABS_TILT_Y,
404                              0, hanwang->features->max_tilt_y, 0, 0);
405         input_set_abs_params(input_dev, ABS_PRESSURE,
406                              0, hanwang->features->max_pressure, 0, 0);
407 
408         endpoint = &intf->cur_altsetting->endpoint[0].desc;
409         usb_fill_int_urb(hanwang->irq, dev,
410                         usb_rcvintpipe(dev, endpoint->bEndpointAddress),
411                         hanwang->data, hanwang->features->pkg_len,
412                         hanwang_irq, hanwang, endpoint->bInterval);
413         hanwang->irq->transfer_dma = hanwang->data_dma;
414         hanwang->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
415 
416         error = input_register_device(hanwang->dev);
417         if (error)
418                 goto fail3;
419 
420         usb_set_intfdata(intf, hanwang);
421 
422         return 0;
423 
424  fail3: usb_free_urb(hanwang->irq);
425  fail2: usb_free_coherent(dev, hanwang->features->pkg_len,
426                         hanwang->data, hanwang->data_dma);
427  fail1: input_free_device(input_dev);
428         kfree(hanwang);
429         return error;
430 
431 }
432 
433 static void hanwang_disconnect(struct usb_interface *intf)
434 {
435         struct hanwang *hanwang = usb_get_intfdata(intf);
436 
437         input_unregister_device(hanwang->dev);
438         usb_free_urb(hanwang->irq);
439         usb_free_coherent(interface_to_usbdev(intf),
440                         hanwang->features->pkg_len, hanwang->data,
441                         hanwang->data_dma);
442         kfree(hanwang);
443         usb_set_intfdata(intf, NULL);
444 }
445 
446 static const struct usb_device_id hanwang_ids[] = {
447         { HANWANG_TABLET_DEVICE(USB_VENDOR_ID_HANWANG, HANWANG_TABLET_INT_CLASS,
448                 HANWANG_TABLET_INT_SUB_CLASS, HANWANG_TABLET_INT_PROTOCOL) },
449         {}
450 };
451 
452 MODULE_DEVICE_TABLE(usb, hanwang_ids);
453 
454 static struct usb_driver hanwang_driver = {
455         .name           = "hanwang",
456         .probe          = hanwang_probe,
457         .disconnect     = hanwang_disconnect,
458         .id_table       = hanwang_ids,
459 };
460 
461 module_usb_driver(hanwang_driver);
462 

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