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1 | /* |
2 | * Copyright (c) 2013 Andrew Duggan <aduggan@synaptics.com> | |
3 | * Copyright (c) 2013 Synaptics Incorporated | |
4 | * Copyright (c) 2014 Benjamin Tissoires <benjamin.tissoires@gmail.com> | |
5 | * Copyright (c) 2014 Red Hat, Inc | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify it | |
8 | * under the terms of the GNU General Public License as published by the Free | |
9 | * Software Foundation; either version 2 of the License, or (at your option) | |
10 | * any later version. | |
11 | */ | |
12 | ||
13 | #include <linux/kernel.h> | |
14 | #include <linux/hid.h> | |
15 | #include <linux/input.h> | |
16 | #include <linux/input/mt.h> | |
17 | #include <linux/module.h> | |
18 | #include <linux/pm.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/wait.h> | |
21 | #include <linux/sched.h> | |
22 | #include "hid-ids.h" | |
23 | ||
24 | #define RMI_MOUSE_REPORT_ID 0x01 /* Mouse emulation Report */ | |
25 | #define RMI_WRITE_REPORT_ID 0x09 /* Output Report */ | |
26 | #define RMI_READ_ADDR_REPORT_ID 0x0a /* Output Report */ | |
27 | #define RMI_READ_DATA_REPORT_ID 0x0b /* Input Report */ | |
28 | #define RMI_ATTN_REPORT_ID 0x0c /* Input Report */ | |
29 | #define RMI_SET_RMI_MODE_REPORT_ID 0x0f /* Feature Report */ | |
30 | ||
31 | /* flags */ | |
32 | #define RMI_READ_REQUEST_PENDING BIT(0) | |
33 | #define RMI_READ_DATA_PENDING BIT(1) | |
34 | #define RMI_STARTED BIT(2) | |
35 | ||
36 | enum rmi_mode_type { | |
37 | RMI_MODE_OFF = 0, | |
38 | RMI_MODE_ATTN_REPORTS = 1, | |
39 | RMI_MODE_NO_PACKED_ATTN_REPORTS = 2, | |
40 | }; | |
41 | ||
42 | struct rmi_function { | |
43 | unsigned page; /* page of the function */ | |
44 | u16 query_base_addr; /* base address for queries */ | |
45 | u16 command_base_addr; /* base address for commands */ | |
46 | u16 control_base_addr; /* base address for controls */ | |
47 | u16 data_base_addr; /* base address for datas */ | |
48 | unsigned int interrupt_base; /* cross-function interrupt number | |
49 | * (uniq in the device)*/ | |
50 | unsigned int interrupt_count; /* number of interrupts */ | |
51 | unsigned int report_size; /* size of a report */ | |
52 | unsigned long irq_mask; /* mask of the interrupts | |
53 | * (to be applied against ATTN IRQ) */ | |
54 | }; | |
55 | ||
56 | /** | |
57 | * struct rmi_data - stores information for hid communication | |
58 | * | |
59 | * @page_mutex: Locks current page to avoid changing pages in unexpected ways. | |
60 | * @page: Keeps track of the current virtual page | |
61 | * | |
62 | * @wait: Used for waiting for read data | |
63 | * | |
64 | * @writeReport: output buffer when writing RMI registers | |
65 | * @readReport: input buffer when reading RMI registers | |
66 | * | |
67 | * @input_report_size: size of an input report (advertised by HID) | |
68 | * @output_report_size: size of an output report (advertised by HID) | |
69 | * | |
70 | * @flags: flags for the current device (started, reading, etc...) | |
71 | * | |
72 | * @f11: placeholder of internal RMI function F11 description | |
73 | * @f30: placeholder of internal RMI function F30 description | |
74 | * | |
75 | * @max_fingers: maximum finger count reported by the device | |
76 | * @max_x: maximum x value reported by the device | |
77 | * @max_y: maximum y value reported by the device | |
78 | * | |
79 | * @gpio_led_count: count of GPIOs + LEDs reported by F30 | |
80 | * @button_count: actual physical buttons count | |
81 | * @button_mask: button mask used to decode GPIO ATTN reports | |
82 | * @button_state_mask: pull state of the buttons | |
83 | * | |
84 | * @input: pointer to the kernel input device | |
85 | * | |
86 | * @reset_work: worker which will be called in case of a mouse report | |
87 | * @hdev: pointer to the struct hid_device | |
88 | */ | |
89 | struct rmi_data { | |
90 | struct mutex page_mutex; | |
91 | int page; | |
92 | ||
93 | wait_queue_head_t wait; | |
94 | ||
95 | u8 *writeReport; | |
96 | u8 *readReport; | |
97 | ||
98 | int input_report_size; | |
99 | int output_report_size; | |
100 | ||
101 | unsigned long flags; | |
102 | ||
103 | struct rmi_function f11; | |
104 | struct rmi_function f30; | |
105 | ||
106 | unsigned int max_fingers; | |
107 | unsigned int max_x; | |
108 | unsigned int max_y; | |
109 | unsigned int x_size_mm; | |
110 | unsigned int y_size_mm; | |
111 | ||
112 | unsigned int gpio_led_count; | |
113 | unsigned int button_count; | |
114 | unsigned long button_mask; | |
115 | unsigned long button_state_mask; | |
116 | ||
117 | struct input_dev *input; | |
118 | ||
119 | struct work_struct reset_work; | |
120 | struct hid_device *hdev; | |
121 | }; | |
122 | ||
123 | #define RMI_PAGE(addr) (((addr) >> 8) & 0xff) | |
124 | ||
125 | static int rmi_write_report(struct hid_device *hdev, u8 *report, int len); | |
126 | ||
127 | /** | |
128 | * rmi_set_page - Set RMI page | |
129 | * @hdev: The pointer to the hid_device struct | |
130 | * @page: The new page address. | |
131 | * | |
132 | * RMI devices have 16-bit addressing, but some of the physical | |
133 | * implementations (like SMBus) only have 8-bit addressing. So RMI implements | |
134 | * a page address at 0xff of every page so we can reliable page addresses | |
135 | * every 256 registers. | |
136 | * | |
137 | * The page_mutex lock must be held when this function is entered. | |
138 | * | |
139 | * Returns zero on success, non-zero on failure. | |
140 | */ | |
141 | static int rmi_set_page(struct hid_device *hdev, u8 page) | |
142 | { | |
143 | struct rmi_data *data = hid_get_drvdata(hdev); | |
144 | int retval; | |
145 | ||
146 | data->writeReport[0] = RMI_WRITE_REPORT_ID; | |
147 | data->writeReport[1] = 1; | |
148 | data->writeReport[2] = 0xFF; | |
149 | data->writeReport[4] = page; | |
150 | ||
151 | retval = rmi_write_report(hdev, data->writeReport, | |
152 | data->output_report_size); | |
153 | if (retval != data->output_report_size) { | |
154 | dev_err(&hdev->dev, | |
155 | "%s: set page failed: %d.", __func__, retval); | |
156 | return retval; | |
157 | } | |
158 | ||
159 | data->page = page; | |
160 | return 0; | |
161 | } | |
162 | ||
163 | static int rmi_set_mode(struct hid_device *hdev, u8 mode) | |
164 | { | |
165 | int ret; | |
166 | u8 txbuf[2] = {RMI_SET_RMI_MODE_REPORT_ID, mode}; | |
167 | ||
168 | ret = hid_hw_raw_request(hdev, RMI_SET_RMI_MODE_REPORT_ID, txbuf, | |
169 | sizeof(txbuf), HID_FEATURE_REPORT, HID_REQ_SET_REPORT); | |
170 | if (ret < 0) { | |
171 | dev_err(&hdev->dev, "unable to set rmi mode to %d (%d)\n", mode, | |
172 | ret); | |
173 | return ret; | |
174 | } | |
175 | ||
176 | return 0; | |
177 | } | |
178 | ||
179 | static int rmi_write_report(struct hid_device *hdev, u8 *report, int len) | |
180 | { | |
181 | int ret; | |
182 | ||
183 | ret = hid_hw_output_report(hdev, (void *)report, len); | |
184 | if (ret < 0) { | |
185 | dev_err(&hdev->dev, "failed to write hid report (%d)\n", ret); | |
186 | return ret; | |
187 | } | |
188 | ||
189 | return ret; | |
190 | } | |
191 | ||
192 | static int rmi_read_block(struct hid_device *hdev, u16 addr, void *buf, | |
193 | const int len) | |
194 | { | |
195 | struct rmi_data *data = hid_get_drvdata(hdev); | |
196 | int ret; | |
197 | int bytes_read; | |
198 | int bytes_needed; | |
199 | int retries; | |
200 | int read_input_count; | |
201 | ||
202 | mutex_lock(&data->page_mutex); | |
203 | ||
204 | if (RMI_PAGE(addr) != data->page) { | |
205 | ret = rmi_set_page(hdev, RMI_PAGE(addr)); | |
206 | if (ret < 0) | |
207 | goto exit; | |
208 | } | |
209 | ||
210 | for (retries = 5; retries > 0; retries--) { | |
211 | data->writeReport[0] = RMI_READ_ADDR_REPORT_ID; | |
212 | data->writeReport[1] = 0; /* old 1 byte read count */ | |
213 | data->writeReport[2] = addr & 0xFF; | |
214 | data->writeReport[3] = (addr >> 8) & 0xFF; | |
215 | data->writeReport[4] = len & 0xFF; | |
216 | data->writeReport[5] = (len >> 8) & 0xFF; | |
217 | ||
218 | set_bit(RMI_READ_REQUEST_PENDING, &data->flags); | |
219 | ||
220 | ret = rmi_write_report(hdev, data->writeReport, | |
221 | data->output_report_size); | |
222 | if (ret != data->output_report_size) { | |
223 | clear_bit(RMI_READ_REQUEST_PENDING, &data->flags); | |
224 | dev_err(&hdev->dev, | |
225 | "failed to write request output report (%d)\n", | |
226 | ret); | |
227 | goto exit; | |
228 | } | |
229 | ||
230 | bytes_read = 0; | |
231 | bytes_needed = len; | |
232 | while (bytes_read < len) { | |
233 | if (!wait_event_timeout(data->wait, | |
234 | test_bit(RMI_READ_DATA_PENDING, &data->flags), | |
235 | msecs_to_jiffies(1000))) { | |
236 | hid_warn(hdev, "%s: timeout elapsed\n", | |
237 | __func__); | |
238 | ret = -EAGAIN; | |
239 | break; | |
240 | } | |
241 | ||
242 | read_input_count = data->readReport[1]; | |
243 | memcpy(buf + bytes_read, &data->readReport[2], | |
244 | read_input_count < bytes_needed ? | |
245 | read_input_count : bytes_needed); | |
246 | ||
247 | bytes_read += read_input_count; | |
248 | bytes_needed -= read_input_count; | |
249 | clear_bit(RMI_READ_DATA_PENDING, &data->flags); | |
250 | } | |
251 | ||
252 | if (ret >= 0) { | |
253 | ret = 0; | |
254 | break; | |
255 | } | |
256 | } | |
257 | ||
258 | exit: | |
259 | clear_bit(RMI_READ_REQUEST_PENDING, &data->flags); | |
260 | mutex_unlock(&data->page_mutex); | |
261 | return ret; | |
262 | } | |
263 | ||
264 | static inline int rmi_read(struct hid_device *hdev, u16 addr, void *buf) | |
265 | { | |
266 | return rmi_read_block(hdev, addr, buf, 1); | |
267 | } | |
268 | ||
269 | static void rmi_f11_process_touch(struct rmi_data *hdata, int slot, | |
270 | u8 finger_state, u8 *touch_data) | |
271 | { | |
272 | int x, y, wx, wy; | |
273 | int wide, major, minor; | |
274 | int z; | |
275 | ||
276 | input_mt_slot(hdata->input, slot); | |
277 | input_mt_report_slot_state(hdata->input, MT_TOOL_FINGER, | |
278 | finger_state == 0x01); | |
279 | if (finger_state == 0x01) { | |
280 | x = (touch_data[0] << 4) | (touch_data[2] & 0x07); | |
281 | y = (touch_data[1] << 4) | (touch_data[2] >> 4); | |
282 | wx = touch_data[3] & 0x07; | |
283 | wy = touch_data[3] >> 4; | |
284 | wide = (wx > wy); | |
285 | major = max(wx, wy); | |
286 | minor = min(wx, wy); | |
287 | z = touch_data[4]; | |
288 | ||
289 | /* y is inverted */ | |
290 | y = hdata->max_y - y; | |
291 | ||
292 | input_event(hdata->input, EV_ABS, ABS_MT_POSITION_X, x); | |
293 | input_event(hdata->input, EV_ABS, ABS_MT_POSITION_Y, y); | |
294 | input_event(hdata->input, EV_ABS, ABS_MT_ORIENTATION, wide); | |
295 | input_event(hdata->input, EV_ABS, ABS_MT_PRESSURE, z); | |
296 | input_event(hdata->input, EV_ABS, ABS_MT_TOUCH_MAJOR, major); | |
297 | input_event(hdata->input, EV_ABS, ABS_MT_TOUCH_MINOR, minor); | |
298 | } | |
299 | } | |
300 | ||
301 | static void rmi_reset_work(struct work_struct *work) | |
302 | { | |
303 | struct rmi_data *hdata = container_of(work, struct rmi_data, | |
304 | reset_work); | |
305 | ||
306 | /* switch the device to RMI if we receive a generic mouse report */ | |
307 | rmi_set_mode(hdata->hdev, RMI_MODE_ATTN_REPORTS); | |
308 | } | |
309 | ||
310 | static inline int rmi_schedule_reset(struct hid_device *hdev) | |
311 | { | |
312 | struct rmi_data *hdata = hid_get_drvdata(hdev); | |
313 | return schedule_work(&hdata->reset_work); | |
314 | } | |
315 | ||
316 | static int rmi_f11_input_event(struct hid_device *hdev, u8 irq, u8 *data, | |
317 | int size) | |
318 | { | |
319 | struct rmi_data *hdata = hid_get_drvdata(hdev); | |
320 | int offset; | |
321 | int i; | |
322 | ||
323 | if (size < hdata->f11.report_size) | |
324 | return 0; | |
325 | ||
326 | if (!(irq & hdata->f11.irq_mask)) | |
327 | return 0; | |
328 | ||
329 | offset = (hdata->max_fingers >> 2) + 1; | |
330 | for (i = 0; i < hdata->max_fingers; i++) { | |
331 | int fs_byte_position = i >> 2; | |
332 | int fs_bit_position = (i & 0x3) << 1; | |
333 | int finger_state = (data[fs_byte_position] >> fs_bit_position) & | |
334 | 0x03; | |
335 | ||
336 | rmi_f11_process_touch(hdata, i, finger_state, | |
337 | &data[offset + 5 * i]); | |
338 | } | |
339 | input_mt_sync_frame(hdata->input); | |
340 | input_sync(hdata->input); | |
341 | return hdata->f11.report_size; | |
342 | } | |
343 | ||
344 | static int rmi_f30_input_event(struct hid_device *hdev, u8 irq, u8 *data, | |
345 | int size) | |
346 | { | |
347 | struct rmi_data *hdata = hid_get_drvdata(hdev); | |
348 | int i; | |
349 | int button = 0; | |
350 | bool value; | |
351 | ||
352 | if (!(irq & hdata->f30.irq_mask)) | |
353 | return 0; | |
354 | ||
355 | for (i = 0; i < hdata->gpio_led_count; i++) { | |
356 | if (test_bit(i, &hdata->button_mask)) { | |
357 | value = (data[i / 8] >> (i & 0x07)) & BIT(0); | |
358 | if (test_bit(i, &hdata->button_state_mask)) | |
359 | value = !value; | |
360 | input_event(hdata->input, EV_KEY, BTN_LEFT + button++, | |
361 | value); | |
362 | } | |
363 | } | |
364 | return hdata->f30.report_size; | |
365 | } | |
366 | ||
367 | static int rmi_input_event(struct hid_device *hdev, u8 *data, int size) | |
368 | { | |
369 | struct rmi_data *hdata = hid_get_drvdata(hdev); | |
370 | unsigned long irq_mask = 0; | |
371 | unsigned index = 2; | |
372 | ||
373 | if (!(test_bit(RMI_STARTED, &hdata->flags))) | |
374 | return 0; | |
375 | ||
376 | irq_mask |= hdata->f11.irq_mask; | |
377 | irq_mask |= hdata->f30.irq_mask; | |
378 | ||
379 | if (data[1] & ~irq_mask) | |
380 | hid_warn(hdev, "unknown intr source:%02lx %s:%d\n", | |
381 | data[1] & ~irq_mask, __FILE__, __LINE__); | |
382 | ||
383 | if (hdata->f11.interrupt_base < hdata->f30.interrupt_base) { | |
384 | index += rmi_f11_input_event(hdev, data[1], &data[index], | |
385 | size - index); | |
386 | index += rmi_f30_input_event(hdev, data[1], &data[index], | |
387 | size - index); | |
388 | } else { | |
389 | index += rmi_f30_input_event(hdev, data[1], &data[index], | |
390 | size - index); | |
391 | index += rmi_f11_input_event(hdev, data[1], &data[index], | |
392 | size - index); | |
393 | } | |
394 | ||
395 | return 1; | |
396 | } | |
397 | ||
398 | static int rmi_read_data_event(struct hid_device *hdev, u8 *data, int size) | |
399 | { | |
400 | struct rmi_data *hdata = hid_get_drvdata(hdev); | |
401 | ||
402 | if (!test_bit(RMI_READ_REQUEST_PENDING, &hdata->flags)) { | |
403 | hid_err(hdev, "no read request pending\n"); | |
404 | return 0; | |
405 | } | |
406 | ||
407 | memcpy(hdata->readReport, data, size < hdata->input_report_size ? | |
408 | size : hdata->input_report_size); | |
409 | set_bit(RMI_READ_DATA_PENDING, &hdata->flags); | |
410 | wake_up(&hdata->wait); | |
411 | ||
412 | return 1; | |
413 | } | |
414 | ||
415 | static int rmi_raw_event(struct hid_device *hdev, | |
416 | struct hid_report *report, u8 *data, int size) | |
417 | { | |
418 | switch (data[0]) { | |
419 | case RMI_READ_DATA_REPORT_ID: | |
420 | return rmi_read_data_event(hdev, data, size); | |
421 | case RMI_ATTN_REPORT_ID: | |
422 | return rmi_input_event(hdev, data, size); | |
423 | case RMI_MOUSE_REPORT_ID: | |
424 | rmi_schedule_reset(hdev); | |
425 | break; | |
426 | } | |
427 | ||
428 | return 0; | |
429 | } | |
430 | ||
431 | static int rmi_post_reset(struct hid_device *hdev) | |
432 | { | |
433 | return rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS); | |
434 | } | |
435 | ||
436 | static int rmi_post_resume(struct hid_device *hdev) | |
437 | { | |
438 | return rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS); | |
439 | } | |
440 | ||
441 | #define RMI4_MAX_PAGE 0xff | |
442 | #define RMI4_PAGE_SIZE 0x0100 | |
443 | ||
444 | #define PDT_START_SCAN_LOCATION 0x00e9 | |
445 | #define PDT_END_SCAN_LOCATION 0x0005 | |
446 | #define RMI4_END_OF_PDT(id) ((id) == 0x00 || (id) == 0xff) | |
447 | ||
448 | struct pdt_entry { | |
449 | u8 query_base_addr:8; | |
450 | u8 command_base_addr:8; | |
451 | u8 control_base_addr:8; | |
452 | u8 data_base_addr:8; | |
453 | u8 interrupt_source_count:3; | |
454 | u8 bits3and4:2; | |
455 | u8 function_version:2; | |
456 | u8 bit7:1; | |
457 | u8 function_number:8; | |
458 | } __attribute__((__packed__)); | |
459 | ||
460 | static inline unsigned long rmi_gen_mask(unsigned irq_base, unsigned irq_count) | |
461 | { | |
462 | return GENMASK(irq_count + irq_base - 1, irq_base); | |
463 | } | |
464 | ||
465 | static void rmi_register_function(struct rmi_data *data, | |
466 | struct pdt_entry *pdt_entry, int page, unsigned interrupt_count) | |
467 | { | |
468 | struct rmi_function *f = NULL; | |
469 | u16 page_base = page << 8; | |
470 | ||
471 | switch (pdt_entry->function_number) { | |
472 | case 0x11: | |
473 | f = &data->f11; | |
474 | break; | |
475 | case 0x30: | |
476 | f = &data->f30; | |
477 | break; | |
478 | } | |
479 | ||
480 | if (f) { | |
481 | f->page = page; | |
482 | f->query_base_addr = page_base | pdt_entry->query_base_addr; | |
483 | f->command_base_addr = page_base | pdt_entry->command_base_addr; | |
484 | f->control_base_addr = page_base | pdt_entry->control_base_addr; | |
485 | f->data_base_addr = page_base | pdt_entry->data_base_addr; | |
486 | f->interrupt_base = interrupt_count; | |
487 | f->interrupt_count = pdt_entry->interrupt_source_count; | |
488 | f->irq_mask = rmi_gen_mask(f->interrupt_base, | |
489 | f->interrupt_count); | |
490 | } | |
491 | } | |
492 | ||
493 | static int rmi_scan_pdt(struct hid_device *hdev) | |
494 | { | |
495 | struct rmi_data *data = hid_get_drvdata(hdev); | |
496 | struct pdt_entry entry; | |
497 | int page; | |
498 | bool page_has_function; | |
499 | int i; | |
500 | int retval; | |
501 | int interrupt = 0; | |
502 | u16 page_start, pdt_start , pdt_end; | |
503 | ||
504 | hid_info(hdev, "Scanning PDT...\n"); | |
505 | ||
506 | for (page = 0; (page <= RMI4_MAX_PAGE); page++) { | |
507 | page_start = RMI4_PAGE_SIZE * page; | |
508 | pdt_start = page_start + PDT_START_SCAN_LOCATION; | |
509 | pdt_end = page_start + PDT_END_SCAN_LOCATION; | |
510 | ||
511 | page_has_function = false; | |
512 | for (i = pdt_start; i >= pdt_end; i -= sizeof(entry)) { | |
513 | retval = rmi_read_block(hdev, i, &entry, sizeof(entry)); | |
514 | if (retval) { | |
515 | hid_err(hdev, | |
516 | "Read of PDT entry at %#06x failed.\n", | |
517 | i); | |
518 | goto error_exit; | |
519 | } | |
520 | ||
521 | if (RMI4_END_OF_PDT(entry.function_number)) | |
522 | break; | |
523 | ||
524 | page_has_function = true; | |
525 | ||
526 | hid_info(hdev, "Found F%02X on page %#04x\n", | |
527 | entry.function_number, page); | |
528 | ||
529 | rmi_register_function(data, &entry, page, interrupt); | |
530 | interrupt += entry.interrupt_source_count; | |
531 | } | |
532 | ||
533 | if (!page_has_function) | |
534 | break; | |
535 | } | |
536 | ||
537 | hid_info(hdev, "%s: Done with PDT scan.\n", __func__); | |
538 | retval = 0; | |
539 | ||
540 | error_exit: | |
541 | return retval; | |
542 | } | |
543 | ||
544 | static int rmi_populate_f11(struct hid_device *hdev) | |
545 | { | |
546 | struct rmi_data *data = hid_get_drvdata(hdev); | |
547 | u8 buf[20]; | |
548 | int ret; | |
549 | bool has_query12; | |
550 | bool has_physical_props; | |
551 | unsigned x_size, y_size; | |
552 | ||
553 | if (!data->f11.query_base_addr) { | |
554 | hid_err(hdev, "No 2D sensor found, giving up.\n"); | |
555 | return -ENODEV; | |
556 | } | |
557 | ||
558 | /* query 0 contains some useful information */ | |
559 | ret = rmi_read(hdev, data->f11.query_base_addr, buf); | |
560 | if (ret) { | |
561 | hid_err(hdev, "can not get query 0: %d.\n", ret); | |
562 | return ret; | |
563 | } | |
564 | has_query12 = !!(buf[0] & BIT(5)); | |
565 | ||
566 | /* query 1 to get the max number of fingers */ | |
567 | ret = rmi_read(hdev, data->f11.query_base_addr + 1, buf); | |
568 | if (ret) { | |
569 | hid_err(hdev, "can not get NumberOfFingers: %d.\n", ret); | |
570 | return ret; | |
571 | } | |
572 | data->max_fingers = (buf[0] & 0x07) + 1; | |
573 | if (data->max_fingers > 5) | |
574 | data->max_fingers = 10; | |
575 | ||
576 | data->f11.report_size = data->max_fingers * 5 + | |
577 | DIV_ROUND_UP(data->max_fingers, 4); | |
578 | ||
579 | if (!(buf[0] & BIT(4))) { | |
580 | hid_err(hdev, "No absolute events, giving up.\n"); | |
581 | return -ENODEV; | |
582 | } | |
583 | ||
584 | /* | |
585 | * query 12 to know if the physical properties are reported | |
586 | * (query 12 is at offset 10 for HID devices) | |
587 | */ | |
588 | if (has_query12) { | |
589 | ret = rmi_read(hdev, data->f11.query_base_addr + 10, buf); | |
590 | if (ret) { | |
591 | hid_err(hdev, "can not get query 12: %d.\n", ret); | |
592 | return ret; | |
593 | } | |
594 | has_physical_props = !!(buf[0] & BIT(5)); | |
595 | ||
596 | if (has_physical_props) { | |
597 | ret = rmi_read_block(hdev, | |
598 | data->f11.query_base_addr + 11, buf, 4); | |
599 | if (ret) { | |
600 | hid_err(hdev, "can not read query 15-18: %d.\n", | |
601 | ret); | |
602 | return ret; | |
603 | } | |
604 | ||
605 | x_size = buf[0] | (buf[1] << 8); | |
606 | y_size = buf[2] | (buf[3] << 8); | |
607 | ||
608 | data->x_size_mm = DIV_ROUND_CLOSEST(x_size, 10); | |
609 | data->y_size_mm = DIV_ROUND_CLOSEST(y_size, 10); | |
610 | ||
611 | hid_info(hdev, "%s: size in mm: %d x %d\n", | |
612 | __func__, data->x_size_mm, data->y_size_mm); | |
613 | } | |
614 | } | |
615 | ||
616 | /* retrieve the ctrl registers */ | |
617 | ret = rmi_read_block(hdev, data->f11.control_base_addr, buf, 20); | |
618 | if (ret) { | |
619 | hid_err(hdev, "can not read ctrl block of size 20: %d.\n", ret); | |
620 | return ret; | |
621 | } | |
622 | ||
623 | data->max_x = buf[6] | (buf[7] << 8); | |
624 | data->max_y = buf[8] | (buf[9] << 8); | |
625 | ||
626 | return 0; | |
627 | } | |
628 | ||
629 | static int rmi_populate_f30(struct hid_device *hdev) | |
630 | { | |
631 | struct rmi_data *data = hid_get_drvdata(hdev); | |
632 | u8 buf[20]; | |
633 | int ret; | |
634 | bool has_gpio, has_led; | |
635 | unsigned bytes_per_ctrl; | |
636 | u8 ctrl2_addr; | |
637 | int ctrl2_3_length; | |
638 | int i; | |
639 | ||
640 | /* function F30 is for physical buttons */ | |
641 | if (!data->f30.query_base_addr) { | |
642 | hid_err(hdev, "No GPIO/LEDs found, giving up.\n"); | |
643 | return -ENODEV; | |
644 | } | |
645 | ||
646 | ret = rmi_read_block(hdev, data->f30.query_base_addr, buf, 2); | |
647 | if (ret) { | |
648 | hid_err(hdev, "can not get F30 query registers: %d.\n", ret); | |
649 | return ret; | |
650 | } | |
651 | ||
652 | has_gpio = !!(buf[0] & BIT(3)); | |
653 | has_led = !!(buf[0] & BIT(2)); | |
654 | data->gpio_led_count = buf[1] & 0x1f; | |
655 | ||
656 | /* retrieve ctrl 2 & 3 registers */ | |
657 | bytes_per_ctrl = (data->gpio_led_count + 7) / 8; | |
658 | /* Ctrl0 is present only if both has_gpio and has_led are set*/ | |
659 | ctrl2_addr = (has_gpio && has_led) ? bytes_per_ctrl : 0; | |
660 | /* Ctrl1 is always be present */ | |
661 | ctrl2_addr += bytes_per_ctrl; | |
662 | ctrl2_3_length = 2 * bytes_per_ctrl; | |
663 | ||
664 | data->f30.report_size = bytes_per_ctrl; | |
665 | ||
666 | ret = rmi_read_block(hdev, data->f30.control_base_addr + ctrl2_addr, | |
667 | buf, ctrl2_3_length); | |
668 | if (ret) { | |
669 | hid_err(hdev, "can not read ctrl 2&3 block of size %d: %d.\n", | |
670 | ctrl2_3_length, ret); | |
671 | return ret; | |
672 | } | |
673 | ||
674 | for (i = 0; i < data->gpio_led_count; i++) { | |
675 | int byte_position = i >> 3; | |
676 | int bit_position = i & 0x07; | |
677 | u8 dir_byte = buf[byte_position]; | |
678 | u8 data_byte = buf[byte_position + bytes_per_ctrl]; | |
679 | bool dir = (dir_byte >> bit_position) & BIT(0); | |
680 | bool dat = (data_byte >> bit_position) & BIT(0); | |
681 | ||
682 | if (dir == 0) { | |
683 | /* input mode */ | |
684 | if (dat) { | |
685 | /* actual buttons have pull up resistor */ | |
686 | data->button_count++; | |
687 | set_bit(i, &data->button_mask); | |
688 | set_bit(i, &data->button_state_mask); | |
689 | } | |
690 | } | |
691 | ||
692 | } | |
693 | ||
694 | return 0; | |
695 | } | |
696 | ||
697 | static int rmi_populate(struct hid_device *hdev) | |
698 | { | |
699 | int ret; | |
700 | ||
701 | ret = rmi_scan_pdt(hdev); | |
702 | if (ret) { | |
703 | hid_err(hdev, "PDT scan failed with code %d.\n", ret); | |
704 | return ret; | |
705 | } | |
706 | ||
707 | ret = rmi_populate_f11(hdev); | |
708 | if (ret) { | |
709 | hid_err(hdev, "Error while initializing F11 (%d).\n", ret); | |
710 | return ret; | |
711 | } | |
712 | ||
713 | ret = rmi_populate_f30(hdev); | |
714 | if (ret) | |
715 | hid_warn(hdev, "Error while initializing F30 (%d).\n", ret); | |
716 | ||
717 | return 0; | |
718 | } | |
719 | ||
720 | static void rmi_input_configured(struct hid_device *hdev, struct hid_input *hi) | |
721 | { | |
722 | struct rmi_data *data = hid_get_drvdata(hdev); | |
723 | struct input_dev *input = hi->input; | |
724 | int ret; | |
725 | int res_x, res_y, i; | |
726 | ||
727 | data->input = input; | |
728 | ||
729 | hid_dbg(hdev, "Opening low level driver\n"); | |
730 | ret = hid_hw_open(hdev); | |
731 | if (ret) | |
732 | return; | |
733 | ||
734 | /* Allow incoming hid reports */ | |
735 | hid_device_io_start(hdev); | |
736 | ||
737 | ret = rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS); | |
738 | if (ret < 0) { | |
739 | dev_err(&hdev->dev, "failed to set rmi mode\n"); | |
740 | goto exit; | |
741 | } | |
742 | ||
743 | ret = rmi_set_page(hdev, 0); | |
744 | if (ret < 0) { | |
745 | dev_err(&hdev->dev, "failed to set page select to 0.\n"); | |
746 | goto exit; | |
747 | } | |
748 | ||
749 | ret = rmi_populate(hdev); | |
750 | if (ret) | |
751 | goto exit; | |
752 | ||
753 | __set_bit(EV_ABS, input->evbit); | |
754 | input_set_abs_params(input, ABS_MT_POSITION_X, 1, data->max_x, 0, 0); | |
755 | input_set_abs_params(input, ABS_MT_POSITION_Y, 1, data->max_y, 0, 0); | |
756 | ||
757 | if (data->x_size_mm && data->x_size_mm) { | |
758 | res_x = (data->max_x - 1) / data->x_size_mm; | |
759 | res_y = (data->max_y - 1) / data->x_size_mm; | |
760 | ||
761 | input_abs_set_res(input, ABS_MT_POSITION_X, res_x); | |
762 | input_abs_set_res(input, ABS_MT_POSITION_Y, res_y); | |
763 | } | |
764 | ||
765 | input_set_abs_params(input, ABS_MT_ORIENTATION, 0, 1, 0, 0); | |
766 | input_set_abs_params(input, ABS_MT_PRESSURE, 0, 0xff, 0, 0); | |
767 | input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 0x0f, 0, 0); | |
768 | input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 0x0f, 0, 0); | |
769 | ||
770 | input_mt_init_slots(input, data->max_fingers, INPUT_MT_POINTER); | |
771 | ||
772 | if (data->button_count) { | |
773 | __set_bit(EV_KEY, input->evbit); | |
774 | for (i = 0; i < data->button_count; i++) | |
775 | __set_bit(BTN_LEFT + i, input->keybit); | |
776 | ||
777 | if (data->button_count == 1) | |
778 | __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); | |
779 | } | |
780 | ||
781 | set_bit(RMI_STARTED, &data->flags); | |
782 | ||
783 | exit: | |
784 | hid_device_io_stop(hdev); | |
785 | hid_hw_close(hdev); | |
786 | } | |
787 | ||
788 | static int rmi_input_mapping(struct hid_device *hdev, | |
789 | struct hid_input *hi, struct hid_field *field, | |
790 | struct hid_usage *usage, unsigned long **bit, int *max) | |
791 | { | |
792 | /* we want to make HID ignore the advertised HID collection */ | |
793 | return -1; | |
794 | } | |
795 | ||
796 | static int rmi_probe(struct hid_device *hdev, const struct hid_device_id *id) | |
797 | { | |
798 | struct rmi_data *data = NULL; | |
799 | int ret; | |
800 | size_t alloc_size; | |
801 | ||
802 | data = devm_kzalloc(&hdev->dev, sizeof(struct rmi_data), GFP_KERNEL); | |
803 | if (!data) | |
804 | return -ENOMEM; | |
805 | ||
806 | INIT_WORK(&data->reset_work, rmi_reset_work); | |
807 | data->hdev = hdev; | |
808 | ||
809 | hid_set_drvdata(hdev, data); | |
810 | ||
811 | hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS; | |
812 | ||
813 | ret = hid_parse(hdev); | |
814 | if (ret) { | |
815 | hid_err(hdev, "parse failed\n"); | |
816 | return ret; | |
817 | } | |
818 | ||
819 | data->input_report_size = (hdev->report_enum[HID_INPUT_REPORT] | |
820 | .report_id_hash[RMI_ATTN_REPORT_ID]->size >> 3) | |
821 | + 1 /* report id */; | |
822 | data->output_report_size = (hdev->report_enum[HID_OUTPUT_REPORT] | |
823 | .report_id_hash[RMI_WRITE_REPORT_ID]->size >> 3) | |
824 | + 1 /* report id */; | |
825 | ||
826 | alloc_size = data->output_report_size + data->input_report_size; | |
827 | ||
828 | data->writeReport = devm_kzalloc(&hdev->dev, alloc_size, GFP_KERNEL); | |
829 | if (!data->writeReport) { | |
830 | ret = -ENOMEM; | |
831 | return ret; | |
832 | } | |
833 | ||
834 | data->readReport = data->writeReport + data->output_report_size; | |
835 | ||
836 | init_waitqueue_head(&data->wait); | |
837 | ||
838 | mutex_init(&data->page_mutex); | |
839 | ||
840 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); | |
841 | if (ret) { | |
842 | hid_err(hdev, "hw start failed\n"); | |
843 | return ret; | |
844 | } | |
845 | ||
846 | if (!test_bit(RMI_STARTED, &data->flags)) { | |
847 | hid_hw_stop(hdev); | |
848 | return -EIO; | |
849 | } | |
850 | ||
851 | hid_hw_stop(hdev); | |
852 | return 0; | |
853 | } | |
854 | ||
855 | static void rmi_remove(struct hid_device *hdev) | |
856 | { | |
857 | struct rmi_data *hdata = hid_get_drvdata(hdev); | |
858 | ||
859 | clear_bit(RMI_STARTED, &hdata->flags); | |
860 | ||
861 | hid_hw_stop(hdev); | |
862 | } | |
863 | ||
864 | static const struct hid_device_id rmi_id[] = { | |
865 | { HID_I2C_DEVICE(USB_VENDOR_ID_SYNAPTICS, HID_ANY_ID) }, | |
866 | { HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, HID_ANY_ID) }, | |
867 | { } | |
868 | }; | |
869 | MODULE_DEVICE_TABLE(hid, rmi_id); | |
870 | ||
871 | static struct hid_driver rmi_driver = { | |
872 | .name = "hid-rmi", | |
873 | .id_table = rmi_id, | |
874 | .probe = rmi_probe, | |
875 | .remove = rmi_remove, | |
876 | .raw_event = rmi_raw_event, | |
877 | .input_mapping = rmi_input_mapping, | |
878 | .input_configured = rmi_input_configured, | |
879 | #ifdef CONFIG_PM | |
880 | .resume = rmi_post_resume, | |
881 | .reset_resume = rmi_post_reset, | |
882 | #endif | |
883 | }; | |
884 | ||
885 | module_hid_driver(rmi_driver); | |
886 | ||
887 | MODULE_AUTHOR("Andrew Duggan <aduggan@synaptics.com>"); | |
888 | MODULE_DESCRIPTION("RMI HID driver"); | |
889 | MODULE_LICENSE("GPL"); |