Commit | Line | Data |
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1afca2b6 MK |
1 | /* |
2 | * Pegasus Mobile Notetaker Pen input tablet driver | |
3 | * | |
4 | * Copyright (c) 2016 Martin Kepplinger <martink@posteo.de> | |
5 | */ | |
6 | ||
7 | /* | |
8 | * request packet (control endpoint): | |
9 | * |-------------------------------------| | |
10 | * | Report ID | Nr of bytes | command | | |
11 | * | (1 byte) | (1 byte) | (n bytes) | | |
12 | * |-------------------------------------| | |
13 | * | 0x02 | n | | | |
14 | * |-------------------------------------| | |
15 | * | |
16 | * data packet after set xy mode command, 0x80 0xb5 0x02 0x01 | |
17 | * and pen is in range: | |
18 | * | |
19 | * byte byte name value (bits) | |
20 | * -------------------------------------------- | |
21 | * 0 status 0 1 0 0 0 0 X X | |
22 | * 1 color 0 0 0 0 H 0 S T | |
23 | * 2 X low | |
24 | * 3 X high | |
25 | * 4 Y low | |
26 | * 5 Y high | |
27 | * | |
28 | * X X battery state: | |
29 | * no state reported 0x00 | |
30 | * battery low 0x01 | |
31 | * battery good 0x02 | |
32 | * | |
33 | * H Hovering | |
34 | * S Switch 1 (pen button) | |
35 | * T Tip | |
36 | */ | |
37 | ||
38 | #include <linux/kernel.h> | |
39 | #include <linux/module.h> | |
40 | #include <linux/input.h> | |
41 | #include <linux/usb/input.h> | |
42 | #include <linux/slab.h> | |
43 | ||
44 | /* USB HID defines */ | |
45 | #define USB_REQ_GET_REPORT 0x01 | |
46 | #define USB_REQ_SET_REPORT 0x09 | |
47 | ||
48 | #define USB_VENDOR_ID_PEGASUSTECH 0x0e20 | |
49 | #define USB_DEVICE_ID_PEGASUS_NOTETAKER_EN100 0x0101 | |
50 | ||
51 | /* device specific defines */ | |
52 | #define NOTETAKER_REPORT_ID 0x02 | |
53 | #define NOTETAKER_SET_CMD 0x80 | |
54 | #define NOTETAKER_SET_MODE 0xb5 | |
55 | ||
56 | #define NOTETAKER_LED_MOUSE 0x02 | |
57 | #define PEN_MODE_XY 0x01 | |
58 | ||
59 | #define SPECIAL_COMMAND 0x80 | |
60 | #define BUTTON_PRESSED 0xb5 | |
61 | #define COMMAND_VERSION 0xa9 | |
62 | ||
63 | /* in xy data packet */ | |
64 | #define BATTERY_NO_REPORT 0x40 | |
65 | #define BATTERY_LOW 0x41 | |
66 | #define BATTERY_GOOD 0x42 | |
67 | #define PEN_BUTTON_PRESSED BIT(1) | |
68 | #define PEN_TIP BIT(0) | |
69 | ||
70 | struct pegasus { | |
71 | unsigned char *data; | |
72 | u8 data_len; | |
73 | dma_addr_t data_dma; | |
74 | struct input_dev *dev; | |
75 | struct usb_device *usbdev; | |
76 | struct usb_interface *intf; | |
77 | struct urb *irq; | |
78 | char name[128]; | |
79 | char phys[64]; | |
80 | struct work_struct init; | |
81 | }; | |
82 | ||
168c1398 | 83 | static int pegasus_control_msg(struct pegasus *pegasus, u8 *data, int len) |
1afca2b6 MK |
84 | { |
85 | const int sizeof_buf = len + 2; | |
86 | int result; | |
168c1398 | 87 | int error; |
1afca2b6 MK |
88 | u8 *cmd_buf; |
89 | ||
90 | cmd_buf = kmalloc(sizeof_buf, GFP_KERNEL); | |
91 | if (!cmd_buf) | |
168c1398 | 92 | return -ENOMEM; |
1afca2b6 MK |
93 | |
94 | cmd_buf[0] = NOTETAKER_REPORT_ID; | |
95 | cmd_buf[1] = len; | |
96 | memcpy(cmd_buf + 2, data, len); | |
97 | ||
98 | result = usb_control_msg(pegasus->usbdev, | |
99 | usb_sndctrlpipe(pegasus->usbdev, 0), | |
100 | USB_REQ_SET_REPORT, | |
101 | USB_TYPE_VENDOR | USB_DIR_OUT, | |
102 | 0, 0, cmd_buf, sizeof_buf, | |
103 | USB_CTRL_SET_TIMEOUT); | |
104 | ||
1afca2b6 | 105 | kfree(cmd_buf); |
168c1398 MK |
106 | |
107 | if (unlikely(result != sizeof_buf)) { | |
108 | error = result < 0 ? result : -EIO; | |
109 | dev_err(&pegasus->usbdev->dev, "control msg error: %d\n", | |
110 | error); | |
111 | return error; | |
112 | } | |
113 | ||
114 | return 0; | |
1afca2b6 MK |
115 | } |
116 | ||
168c1398 | 117 | static int pegasus_set_mode(struct pegasus *pegasus, u8 mode, u8 led) |
1afca2b6 MK |
118 | { |
119 | u8 cmd[] = { NOTETAKER_SET_CMD, NOTETAKER_SET_MODE, led, mode }; | |
120 | ||
168c1398 | 121 | return pegasus_control_msg(pegasus, cmd, sizeof(cmd)); |
1afca2b6 MK |
122 | } |
123 | ||
124 | static void pegasus_parse_packet(struct pegasus *pegasus) | |
125 | { | |
126 | unsigned char *data = pegasus->data; | |
127 | struct input_dev *dev = pegasus->dev; | |
128 | u16 x, y; | |
129 | ||
130 | switch (data[0]) { | |
131 | case SPECIAL_COMMAND: | |
132 | /* device button pressed */ | |
133 | if (data[1] == BUTTON_PRESSED) | |
134 | schedule_work(&pegasus->init); | |
135 | ||
136 | break; | |
137 | ||
138 | /* xy data */ | |
139 | case BATTERY_LOW: | |
140 | dev_warn_once(&dev->dev, "Pen battery low\n"); | |
141 | /* fall through */ | |
142 | ||
143 | case BATTERY_NO_REPORT: | |
144 | case BATTERY_GOOD: | |
145 | x = le16_to_cpup((__le16 *)&data[2]); | |
146 | y = le16_to_cpup((__le16 *)&data[4]); | |
147 | ||
148 | /* pen-up event */ | |
149 | if (x == 0 && y == 0) | |
150 | break; | |
151 | ||
152 | input_report_key(dev, BTN_TOUCH, data[1] & PEN_TIP); | |
153 | input_report_key(dev, BTN_RIGHT, data[1] & PEN_BUTTON_PRESSED); | |
154 | input_report_key(dev, BTN_TOOL_PEN, 1); | |
155 | input_report_abs(dev, ABS_X, (s16)x); | |
156 | input_report_abs(dev, ABS_Y, y); | |
157 | ||
158 | input_sync(dev); | |
159 | break; | |
160 | ||
161 | default: | |
162 | dev_warn_once(&pegasus->usbdev->dev, | |
163 | "unknown answer from device\n"); | |
164 | } | |
165 | } | |
166 | ||
167 | static void pegasus_irq(struct urb *urb) | |
168 | { | |
169 | struct pegasus *pegasus = urb->context; | |
170 | struct usb_device *dev = pegasus->usbdev; | |
171 | int retval; | |
172 | ||
173 | switch (urb->status) { | |
174 | case 0: | |
175 | pegasus_parse_packet(pegasus); | |
176 | usb_mark_last_busy(pegasus->usbdev); | |
177 | break; | |
178 | ||
179 | case -ECONNRESET: | |
180 | case -ENOENT: | |
181 | case -ESHUTDOWN: | |
182 | dev_err(&dev->dev, "%s - urb shutting down with status: %d", | |
183 | __func__, urb->status); | |
184 | return; | |
185 | ||
186 | default: | |
187 | dev_err(&dev->dev, "%s - nonzero urb status received: %d", | |
188 | __func__, urb->status); | |
189 | break; | |
190 | } | |
191 | ||
192 | retval = usb_submit_urb(urb, GFP_ATOMIC); | |
193 | if (retval) | |
194 | dev_err(&dev->dev, "%s - usb_submit_urb failed with result %d", | |
195 | __func__, retval); | |
196 | } | |
197 | ||
198 | static void pegasus_init(struct work_struct *work) | |
199 | { | |
200 | struct pegasus *pegasus = container_of(work, struct pegasus, init); | |
168c1398 | 201 | int error; |
1afca2b6 | 202 | |
168c1398 MK |
203 | error = pegasus_set_mode(pegasus, PEN_MODE_XY, NOTETAKER_LED_MOUSE); |
204 | if (error) | |
205 | dev_err(&pegasus->usbdev->dev, "pegasus_set_mode error: %d\n", | |
206 | error); | |
1afca2b6 MK |
207 | } |
208 | ||
209 | static int pegasus_open(struct input_dev *dev) | |
210 | { | |
211 | struct pegasus *pegasus = input_get_drvdata(dev); | |
9d3bef0b | 212 | int error; |
1afca2b6 | 213 | |
9d3bef0b MK |
214 | error = usb_autopm_get_interface(pegasus->intf); |
215 | if (error) | |
216 | return error; | |
1afca2b6 MK |
217 | |
218 | pegasus->irq->dev = pegasus->usbdev; | |
9d3bef0b MK |
219 | if (usb_submit_urb(pegasus->irq, GFP_KERNEL)) { |
220 | error = -EIO; | |
221 | goto err_autopm_put; | |
222 | } | |
1afca2b6 | 223 | |
9d3bef0b MK |
224 | error = pegasus_set_mode(pegasus, PEN_MODE_XY, NOTETAKER_LED_MOUSE); |
225 | if (error) | |
226 | goto err_kill_urb; | |
1afca2b6 | 227 | |
9d3bef0b | 228 | return 0; |
1afca2b6 | 229 | |
9d3bef0b MK |
230 | err_kill_urb: |
231 | usb_kill_urb(pegasus->irq); | |
232 | cancel_work_sync(&pegasus->init); | |
233 | err_autopm_put: | |
234 | usb_autopm_put_interface(pegasus->intf); | |
235 | return error; | |
1afca2b6 MK |
236 | } |
237 | ||
238 | static void pegasus_close(struct input_dev *dev) | |
239 | { | |
240 | struct pegasus *pegasus = input_get_drvdata(dev); | |
1afca2b6 | 241 | |
1afca2b6 MK |
242 | usb_kill_urb(pegasus->irq); |
243 | cancel_work_sync(&pegasus->init); | |
9d3bef0b | 244 | usb_autopm_put_interface(pegasus->intf); |
1afca2b6 MK |
245 | } |
246 | ||
247 | static int pegasus_probe(struct usb_interface *intf, | |
248 | const struct usb_device_id *id) | |
249 | { | |
250 | struct usb_device *dev = interface_to_usbdev(intf); | |
251 | struct usb_endpoint_descriptor *endpoint; | |
252 | struct pegasus *pegasus; | |
253 | struct input_dev *input_dev; | |
254 | int error; | |
255 | int pipe; | |
256 | ||
257 | /* We control interface 0 */ | |
258 | if (intf->cur_altsetting->desc.bInterfaceNumber >= 1) | |
259 | return -ENODEV; | |
260 | ||
261 | /* Sanity check that the device has an endpoint */ | |
262 | if (intf->altsetting[0].desc.bNumEndpoints < 1) { | |
263 | dev_err(&intf->dev, "Invalid number of endpoints\n"); | |
264 | return -EINVAL; | |
265 | } | |
266 | ||
267 | endpoint = &intf->cur_altsetting->endpoint[0].desc; | |
268 | ||
269 | pegasus = kzalloc(sizeof(*pegasus), GFP_KERNEL); | |
270 | input_dev = input_allocate_device(); | |
271 | if (!pegasus || !input_dev) { | |
272 | error = -ENOMEM; | |
273 | goto err_free_mem; | |
274 | } | |
275 | ||
276 | pegasus->usbdev = dev; | |
277 | pegasus->dev = input_dev; | |
278 | pegasus->intf = intf; | |
279 | ||
280 | pipe = usb_rcvintpipe(dev, endpoint->bEndpointAddress); | |
281 | pegasus->data_len = usb_maxpacket(dev, pipe, usb_pipeout(pipe)); | |
282 | ||
283 | pegasus->data = usb_alloc_coherent(dev, pegasus->data_len, GFP_KERNEL, | |
284 | &pegasus->data_dma); | |
285 | if (!pegasus->data) { | |
286 | error = -ENOMEM; | |
287 | goto err_free_mem; | |
288 | } | |
289 | ||
290 | pegasus->irq = usb_alloc_urb(0, GFP_KERNEL); | |
291 | if (!pegasus->irq) { | |
292 | error = -ENOMEM; | |
293 | goto err_free_dma; | |
294 | } | |
295 | ||
296 | usb_fill_int_urb(pegasus->irq, dev, pipe, | |
297 | pegasus->data, pegasus->data_len, | |
298 | pegasus_irq, pegasus, endpoint->bInterval); | |
299 | ||
300 | pegasus->irq->transfer_dma = pegasus->data_dma; | |
301 | pegasus->irq->transfer_flags |= URB_NO_TRANSFER_DMA_MAP; | |
302 | ||
303 | if (dev->manufacturer) | |
304 | strlcpy(pegasus->name, dev->manufacturer, | |
305 | sizeof(pegasus->name)); | |
306 | ||
307 | if (dev->product) { | |
308 | if (dev->manufacturer) | |
309 | strlcat(pegasus->name, " ", sizeof(pegasus->name)); | |
310 | strlcat(pegasus->name, dev->product, sizeof(pegasus->name)); | |
311 | } | |
312 | ||
313 | if (!strlen(pegasus->name)) | |
314 | snprintf(pegasus->name, sizeof(pegasus->name), | |
315 | "USB Pegasus Device %04x:%04x", | |
316 | le16_to_cpu(dev->descriptor.idVendor), | |
317 | le16_to_cpu(dev->descriptor.idProduct)); | |
318 | ||
319 | usb_make_path(dev, pegasus->phys, sizeof(pegasus->phys)); | |
320 | strlcat(pegasus->phys, "/input0", sizeof(pegasus->phys)); | |
321 | ||
322 | INIT_WORK(&pegasus->init, pegasus_init); | |
323 | ||
324 | usb_set_intfdata(intf, pegasus); | |
325 | ||
326 | input_dev->name = pegasus->name; | |
327 | input_dev->phys = pegasus->phys; | |
328 | usb_to_input_id(dev, &input_dev->id); | |
329 | input_dev->dev.parent = &intf->dev; | |
330 | ||
331 | input_set_drvdata(input_dev, pegasus); | |
332 | ||
333 | input_dev->open = pegasus_open; | |
334 | input_dev->close = pegasus_close; | |
335 | ||
336 | __set_bit(EV_ABS, input_dev->evbit); | |
337 | __set_bit(EV_KEY, input_dev->evbit); | |
338 | ||
339 | __set_bit(ABS_X, input_dev->absbit); | |
340 | __set_bit(ABS_Y, input_dev->absbit); | |
341 | ||
342 | __set_bit(BTN_TOUCH, input_dev->keybit); | |
343 | __set_bit(BTN_RIGHT, input_dev->keybit); | |
344 | __set_bit(BTN_TOOL_PEN, input_dev->keybit); | |
345 | ||
346 | __set_bit(INPUT_PROP_DIRECT, input_dev->propbit); | |
347 | __set_bit(INPUT_PROP_POINTER, input_dev->propbit); | |
348 | ||
349 | input_set_abs_params(input_dev, ABS_X, -1500, 1500, 8, 0); | |
350 | input_set_abs_params(input_dev, ABS_Y, 1600, 3000, 8, 0); | |
351 | ||
352 | error = input_register_device(pegasus->dev); | |
353 | if (error) | |
354 | goto err_free_urb; | |
355 | ||
356 | return 0; | |
357 | ||
358 | err_free_urb: | |
359 | usb_free_urb(pegasus->irq); | |
360 | err_free_dma: | |
361 | usb_free_coherent(dev, pegasus->data_len, | |
362 | pegasus->data, pegasus->data_dma); | |
363 | err_free_mem: | |
364 | input_free_device(input_dev); | |
365 | kfree(pegasus); | |
366 | usb_set_intfdata(intf, NULL); | |
367 | ||
368 | return error; | |
369 | } | |
370 | ||
371 | static void pegasus_disconnect(struct usb_interface *intf) | |
372 | { | |
373 | struct pegasus *pegasus = usb_get_intfdata(intf); | |
374 | ||
375 | input_unregister_device(pegasus->dev); | |
376 | ||
377 | usb_free_urb(pegasus->irq); | |
378 | usb_free_coherent(interface_to_usbdev(intf), | |
379 | pegasus->data_len, pegasus->data, | |
380 | pegasus->data_dma); | |
381 | ||
382 | kfree(pegasus); | |
383 | usb_set_intfdata(intf, NULL); | |
384 | } | |
385 | ||
386 | static int pegasus_suspend(struct usb_interface *intf, pm_message_t message) | |
387 | { | |
388 | struct pegasus *pegasus = usb_get_intfdata(intf); | |
389 | ||
390 | mutex_lock(&pegasus->dev->mutex); | |
391 | usb_kill_urb(pegasus->irq); | |
f32f5394 | 392 | cancel_work_sync(&pegasus->init); |
1afca2b6 MK |
393 | mutex_unlock(&pegasus->dev->mutex); |
394 | ||
395 | return 0; | |
396 | } | |
397 | ||
398 | static int pegasus_resume(struct usb_interface *intf) | |
399 | { | |
400 | struct pegasus *pegasus = usb_get_intfdata(intf); | |
401 | int retval = 0; | |
402 | ||
403 | mutex_lock(&pegasus->dev->mutex); | |
404 | if (pegasus->dev->users && usb_submit_urb(pegasus->irq, GFP_NOIO) < 0) | |
405 | retval = -EIO; | |
406 | mutex_unlock(&pegasus->dev->mutex); | |
407 | ||
408 | return retval; | |
409 | } | |
410 | ||
411 | static int pegasus_reset_resume(struct usb_interface *intf) | |
412 | { | |
c1d7b7c1 MK |
413 | struct pegasus *pegasus = usb_get_intfdata(intf); |
414 | int retval = 0; | |
415 | ||
416 | mutex_lock(&pegasus->dev->mutex); | |
417 | if (pegasus->dev->users) { | |
418 | retval = pegasus_set_mode(pegasus, PEN_MODE_XY, | |
419 | NOTETAKER_LED_MOUSE); | |
420 | if (!retval && usb_submit_urb(pegasus->irq, GFP_NOIO) < 0) | |
421 | retval = -EIO; | |
422 | } | |
423 | mutex_unlock(&pegasus->dev->mutex); | |
424 | ||
425 | return retval; | |
1afca2b6 MK |
426 | } |
427 | ||
428 | static const struct usb_device_id pegasus_ids[] = { | |
429 | { USB_DEVICE(USB_VENDOR_ID_PEGASUSTECH, | |
430 | USB_DEVICE_ID_PEGASUS_NOTETAKER_EN100) }, | |
431 | { } | |
432 | }; | |
433 | MODULE_DEVICE_TABLE(usb, pegasus_ids); | |
434 | ||
435 | static struct usb_driver pegasus_driver = { | |
436 | .name = "pegasus_notetaker", | |
437 | .probe = pegasus_probe, | |
438 | .disconnect = pegasus_disconnect, | |
439 | .suspend = pegasus_suspend, | |
440 | .resume = pegasus_resume, | |
441 | .reset_resume = pegasus_reset_resume, | |
442 | .id_table = pegasus_ids, | |
443 | .supports_autosuspend = 1, | |
444 | }; | |
445 | ||
446 | module_usb_driver(pegasus_driver); | |
447 | ||
448 | MODULE_AUTHOR("Martin Kepplinger <martink@posteo.de>"); | |
449 | MODULE_DESCRIPTION("Pegasus Mobile Notetaker Pen tablet driver"); | |
450 | MODULE_LICENSE("GPL"); |