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9fb6bf02 BT |
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> | |
0b2c7a89 AD |
17 | #include <linux/irq.h> |
18 | #include <linux/irqdomain.h> | |
9fb6bf02 BT |
19 | #include <linux/module.h> |
20 | #include <linux/pm.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/wait.h> | |
23 | #include <linux/sched.h> | |
0b2c7a89 | 24 | #include <linux/rmi.h> |
9fb6bf02 BT |
25 | #include "hid-ids.h" |
26 | ||
27 | #define RMI_MOUSE_REPORT_ID 0x01 /* Mouse emulation Report */ | |
28 | #define RMI_WRITE_REPORT_ID 0x09 /* Output Report */ | |
29 | #define RMI_READ_ADDR_REPORT_ID 0x0a /* Output Report */ | |
30 | #define RMI_READ_DATA_REPORT_ID 0x0b /* Input Report */ | |
31 | #define RMI_ATTN_REPORT_ID 0x0c /* Input Report */ | |
32 | #define RMI_SET_RMI_MODE_REPORT_ID 0x0f /* Feature Report */ | |
33 | ||
34 | /* flags */ | |
af43c408 DC |
35 | #define RMI_READ_REQUEST_PENDING 0 |
36 | #define RMI_READ_DATA_PENDING 1 | |
37 | #define RMI_STARTED 2 | |
9fb6bf02 | 38 | |
2f43de60 AD |
39 | /* device flags */ |
40 | #define RMI_DEVICE BIT(0) | |
79364d87 | 41 | #define RMI_DEVICE_HAS_PHYS_BUTTONS BIT(1) |
2f43de60 | 42 | |
7035f3a4 AD |
43 | /* |
44 | * retrieve the ctrl registers | |
45 | * the ctrl register has a size of 20 but a fw bug split it into 16 + 4, | |
46 | * and there is no way to know if the first 20 bytes are here or not. | |
47 | * We use only the first 12 bytes, so get only them. | |
48 | */ | |
49 | #define RMI_F11_CTRL_REG_COUNT 12 | |
50 | ||
9fb6bf02 BT |
51 | enum rmi_mode_type { |
52 | RMI_MODE_OFF = 0, | |
53 | RMI_MODE_ATTN_REPORTS = 1, | |
54 | RMI_MODE_NO_PACKED_ATTN_REPORTS = 2, | |
55 | }; | |
56 | ||
9fb6bf02 BT |
57 | /** |
58 | * struct rmi_data - stores information for hid communication | |
59 | * | |
60 | * @page_mutex: Locks current page to avoid changing pages in unexpected ways. | |
61 | * @page: Keeps track of the current virtual page | |
0b2c7a89 | 62 | * @xport: transport device to be registered with the RMI4 core. |
9fb6bf02 BT |
63 | * |
64 | * @wait: Used for waiting for read data | |
65 | * | |
66 | * @writeReport: output buffer when writing RMI registers | |
67 | * @readReport: input buffer when reading RMI registers | |
68 | * | |
69 | * @input_report_size: size of an input report (advertised by HID) | |
70 | * @output_report_size: size of an output report (advertised by HID) | |
71 | * | |
72 | * @flags: flags for the current device (started, reading, etc...) | |
73 | * | |
9fb6bf02 BT |
74 | * @reset_work: worker which will be called in case of a mouse report |
75 | * @hdev: pointer to the struct hid_device | |
0b2c7a89 AD |
76 | * |
77 | * @device_flags: flags which describe the device | |
78 | * | |
79 | * @domain: the IRQ domain allocated for this RMI4 device | |
80 | * @rmi_irq: the irq that will be used to generate events to rmi-core | |
9fb6bf02 BT |
81 | */ |
82 | struct rmi_data { | |
83 | struct mutex page_mutex; | |
84 | int page; | |
0b2c7a89 | 85 | struct rmi_transport_dev xport; |
9fb6bf02 BT |
86 | |
87 | wait_queue_head_t wait; | |
88 | ||
89 | u8 *writeReport; | |
90 | u8 *readReport; | |
91 | ||
92 | int input_report_size; | |
93 | int output_report_size; | |
94 | ||
95 | unsigned long flags; | |
96 | ||
9fb6bf02 BT |
97 | struct work_struct reset_work; |
98 | struct hid_device *hdev; | |
2f43de60 AD |
99 | |
100 | unsigned long device_flags; | |
09256360 | 101 | |
0b2c7a89 AD |
102 | struct irq_domain *domain; |
103 | int rmi_irq; | |
9fb6bf02 BT |
104 | }; |
105 | ||
106 | #define RMI_PAGE(addr) (((addr) >> 8) & 0xff) | |
107 | ||
108 | static int rmi_write_report(struct hid_device *hdev, u8 *report, int len); | |
109 | ||
110 | /** | |
111 | * rmi_set_page - Set RMI page | |
112 | * @hdev: The pointer to the hid_device struct | |
113 | * @page: The new page address. | |
114 | * | |
115 | * RMI devices have 16-bit addressing, but some of the physical | |
116 | * implementations (like SMBus) only have 8-bit addressing. So RMI implements | |
117 | * a page address at 0xff of every page so we can reliable page addresses | |
118 | * every 256 registers. | |
119 | * | |
120 | * The page_mutex lock must be held when this function is entered. | |
121 | * | |
122 | * Returns zero on success, non-zero on failure. | |
123 | */ | |
124 | static int rmi_set_page(struct hid_device *hdev, u8 page) | |
125 | { | |
126 | struct rmi_data *data = hid_get_drvdata(hdev); | |
127 | int retval; | |
128 | ||
129 | data->writeReport[0] = RMI_WRITE_REPORT_ID; | |
130 | data->writeReport[1] = 1; | |
131 | data->writeReport[2] = 0xFF; | |
132 | data->writeReport[4] = page; | |
133 | ||
134 | retval = rmi_write_report(hdev, data->writeReport, | |
135 | data->output_report_size); | |
136 | if (retval != data->output_report_size) { | |
137 | dev_err(&hdev->dev, | |
138 | "%s: set page failed: %d.", __func__, retval); | |
139 | return retval; | |
140 | } | |
141 | ||
142 | data->page = page; | |
143 | return 0; | |
144 | } | |
145 | ||
146 | static int rmi_set_mode(struct hid_device *hdev, u8 mode) | |
147 | { | |
148 | int ret; | |
6dab07df BT |
149 | const u8 txbuf[2] = {RMI_SET_RMI_MODE_REPORT_ID, mode}; |
150 | u8 *buf; | |
9fb6bf02 | 151 | |
6dab07df BT |
152 | buf = kmemdup(txbuf, sizeof(txbuf), GFP_KERNEL); |
153 | if (!buf) | |
154 | return -ENOMEM; | |
155 | ||
156 | ret = hid_hw_raw_request(hdev, RMI_SET_RMI_MODE_REPORT_ID, buf, | |
9fb6bf02 | 157 | sizeof(txbuf), HID_FEATURE_REPORT, HID_REQ_SET_REPORT); |
6dab07df | 158 | kfree(buf); |
9fb6bf02 BT |
159 | if (ret < 0) { |
160 | dev_err(&hdev->dev, "unable to set rmi mode to %d (%d)\n", mode, | |
161 | ret); | |
162 | return ret; | |
163 | } | |
164 | ||
165 | return 0; | |
166 | } | |
167 | ||
168 | static int rmi_write_report(struct hid_device *hdev, u8 *report, int len) | |
169 | { | |
170 | int ret; | |
171 | ||
172 | ret = hid_hw_output_report(hdev, (void *)report, len); | |
173 | if (ret < 0) { | |
174 | dev_err(&hdev->dev, "failed to write hid report (%d)\n", ret); | |
175 | return ret; | |
176 | } | |
177 | ||
178 | return ret; | |
179 | } | |
180 | ||
0b2c7a89 AD |
181 | static int rmi_hid_read_block(struct rmi_transport_dev *xport, u16 addr, |
182 | void *buf, size_t len) | |
9fb6bf02 | 183 | { |
0b2c7a89 AD |
184 | struct rmi_data *data = container_of(xport, struct rmi_data, xport); |
185 | struct hid_device *hdev = data->hdev; | |
9fb6bf02 BT |
186 | int ret; |
187 | int bytes_read; | |
188 | int bytes_needed; | |
189 | int retries; | |
190 | int read_input_count; | |
191 | ||
192 | mutex_lock(&data->page_mutex); | |
193 | ||
194 | if (RMI_PAGE(addr) != data->page) { | |
195 | ret = rmi_set_page(hdev, RMI_PAGE(addr)); | |
196 | if (ret < 0) | |
197 | goto exit; | |
198 | } | |
199 | ||
200 | for (retries = 5; retries > 0; retries--) { | |
201 | data->writeReport[0] = RMI_READ_ADDR_REPORT_ID; | |
202 | data->writeReport[1] = 0; /* old 1 byte read count */ | |
203 | data->writeReport[2] = addr & 0xFF; | |
204 | data->writeReport[3] = (addr >> 8) & 0xFF; | |
205 | data->writeReport[4] = len & 0xFF; | |
206 | data->writeReport[5] = (len >> 8) & 0xFF; | |
207 | ||
208 | set_bit(RMI_READ_REQUEST_PENDING, &data->flags); | |
209 | ||
210 | ret = rmi_write_report(hdev, data->writeReport, | |
211 | data->output_report_size); | |
212 | if (ret != data->output_report_size) { | |
213 | clear_bit(RMI_READ_REQUEST_PENDING, &data->flags); | |
214 | dev_err(&hdev->dev, | |
215 | "failed to write request output report (%d)\n", | |
216 | ret); | |
217 | goto exit; | |
218 | } | |
219 | ||
220 | bytes_read = 0; | |
221 | bytes_needed = len; | |
222 | while (bytes_read < len) { | |
223 | if (!wait_event_timeout(data->wait, | |
224 | test_bit(RMI_READ_DATA_PENDING, &data->flags), | |
225 | msecs_to_jiffies(1000))) { | |
226 | hid_warn(hdev, "%s: timeout elapsed\n", | |
227 | __func__); | |
228 | ret = -EAGAIN; | |
229 | break; | |
230 | } | |
231 | ||
232 | read_input_count = data->readReport[1]; | |
233 | memcpy(buf + bytes_read, &data->readReport[2], | |
234 | read_input_count < bytes_needed ? | |
235 | read_input_count : bytes_needed); | |
236 | ||
237 | bytes_read += read_input_count; | |
238 | bytes_needed -= read_input_count; | |
239 | clear_bit(RMI_READ_DATA_PENDING, &data->flags); | |
240 | } | |
241 | ||
242 | if (ret >= 0) { | |
243 | ret = 0; | |
244 | break; | |
245 | } | |
246 | } | |
247 | ||
248 | exit: | |
249 | clear_bit(RMI_READ_REQUEST_PENDING, &data->flags); | |
250 | mutex_unlock(&data->page_mutex); | |
251 | return ret; | |
252 | } | |
253 | ||
0b2c7a89 AD |
254 | static int rmi_hid_write_block(struct rmi_transport_dev *xport, u16 addr, |
255 | const void *buf, size_t len) | |
dd8df284 | 256 | { |
0b2c7a89 AD |
257 | struct rmi_data *data = container_of(xport, struct rmi_data, xport); |
258 | struct hid_device *hdev = data->hdev; | |
dd8df284 AD |
259 | int ret; |
260 | ||
261 | mutex_lock(&data->page_mutex); | |
262 | ||
263 | if (RMI_PAGE(addr) != data->page) { | |
264 | ret = rmi_set_page(hdev, RMI_PAGE(addr)); | |
265 | if (ret < 0) | |
266 | goto exit; | |
267 | } | |
268 | ||
269 | data->writeReport[0] = RMI_WRITE_REPORT_ID; | |
270 | data->writeReport[1] = len; | |
271 | data->writeReport[2] = addr & 0xFF; | |
272 | data->writeReport[3] = (addr >> 8) & 0xFF; | |
273 | memcpy(&data->writeReport[4], buf, len); | |
274 | ||
275 | ret = rmi_write_report(hdev, data->writeReport, | |
276 | data->output_report_size); | |
277 | if (ret < 0) { | |
278 | dev_err(&hdev->dev, | |
279 | "failed to write request output report (%d)\n", | |
280 | ret); | |
281 | goto exit; | |
282 | } | |
283 | ret = 0; | |
284 | ||
285 | exit: | |
286 | mutex_unlock(&data->page_mutex); | |
287 | return ret; | |
288 | } | |
289 | ||
9a98b338 AD |
290 | static int rmi_reset_attn_mode(struct hid_device *hdev) |
291 | { | |
292 | struct rmi_data *data = hid_get_drvdata(hdev); | |
0b2c7a89 | 293 | struct rmi_device *rmi_dev = data->xport.rmi_dev; |
9a98b338 AD |
294 | int ret; |
295 | ||
296 | ret = rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS); | |
297 | if (ret) | |
298 | return ret; | |
299 | ||
0b2c7a89 AD |
300 | if (test_bit(RMI_STARTED, &data->flags)) |
301 | ret = rmi_dev->driver->reset_handler(rmi_dev); | |
9a98b338 | 302 | |
0b2c7a89 | 303 | return ret; |
9a98b338 AD |
304 | } |
305 | ||
9fb6bf02 BT |
306 | static void rmi_reset_work(struct work_struct *work) |
307 | { | |
308 | struct rmi_data *hdata = container_of(work, struct rmi_data, | |
309 | reset_work); | |
310 | ||
311 | /* switch the device to RMI if we receive a generic mouse report */ | |
9a98b338 | 312 | rmi_reset_attn_mode(hdata->hdev); |
9fb6bf02 BT |
313 | } |
314 | ||
0b2c7a89 | 315 | static int rmi_input_event(struct hid_device *hdev, u8 *data, int size) |
9fb6bf02 BT |
316 | { |
317 | struct rmi_data *hdata = hid_get_drvdata(hdev); | |
0b2c7a89 AD |
318 | struct rmi_device *rmi_dev = hdata->xport.rmi_dev; |
319 | unsigned long flags; | |
9fb6bf02 | 320 | |
0b2c7a89 | 321 | if (!(test_bit(RMI_STARTED, &hdata->flags))) |
9fb6bf02 BT |
322 | return 0; |
323 | ||
0b2c7a89 | 324 | local_irq_save(flags); |
5b65c2a0 | 325 | |
0b2c7a89 | 326 | rmi_set_attn_data(rmi_dev, data[1], &data[2], size - 2); |
9fb6bf02 | 327 | |
0b2c7a89 | 328 | generic_handle_irq(hdata->rmi_irq); |
9fb6bf02 | 329 | |
0b2c7a89 | 330 | local_irq_restore(flags); |
9fb6bf02 BT |
331 | |
332 | return 1; | |
333 | } | |
334 | ||
335 | static int rmi_read_data_event(struct hid_device *hdev, u8 *data, int size) | |
336 | { | |
337 | struct rmi_data *hdata = hid_get_drvdata(hdev); | |
338 | ||
339 | if (!test_bit(RMI_READ_REQUEST_PENDING, &hdata->flags)) { | |
01a5f8a4 | 340 | hid_dbg(hdev, "no read request pending\n"); |
9fb6bf02 BT |
341 | return 0; |
342 | } | |
343 | ||
344 | memcpy(hdata->readReport, data, size < hdata->input_report_size ? | |
345 | size : hdata->input_report_size); | |
346 | set_bit(RMI_READ_DATA_PENDING, &hdata->flags); | |
347 | wake_up(&hdata->wait); | |
348 | ||
349 | return 1; | |
350 | } | |
351 | ||
5b65c2a0 BT |
352 | static int rmi_check_sanity(struct hid_device *hdev, u8 *data, int size) |
353 | { | |
354 | int valid_size = size; | |
355 | /* | |
356 | * On the Dell XPS 13 9333, the bus sometimes get confused and fills | |
357 | * the report with a sentinel value "ff". Synaptics told us that such | |
358 | * behavior does not comes from the touchpad itself, so we filter out | |
359 | * such reports here. | |
360 | */ | |
361 | ||
362 | while ((data[valid_size - 1] == 0xff) && valid_size > 0) | |
363 | valid_size--; | |
364 | ||
365 | return valid_size; | |
366 | } | |
367 | ||
9fb6bf02 BT |
368 | static int rmi_raw_event(struct hid_device *hdev, |
369 | struct hid_report *report, u8 *data, int size) | |
370 | { | |
5b65c2a0 BT |
371 | size = rmi_check_sanity(hdev, data, size); |
372 | if (size < 2) | |
373 | return 0; | |
374 | ||
9fb6bf02 BT |
375 | switch (data[0]) { |
376 | case RMI_READ_DATA_REPORT_ID: | |
377 | return rmi_read_data_event(hdev, data, size); | |
378 | case RMI_ATTN_REPORT_ID: | |
379 | return rmi_input_event(hdev, data, size); | |
2f43de60 AD |
380 | default: |
381 | return 1; | |
382 | } | |
383 | ||
384 | return 0; | |
385 | } | |
386 | ||
387 | static int rmi_event(struct hid_device *hdev, struct hid_field *field, | |
388 | struct hid_usage *usage, __s32 value) | |
389 | { | |
390 | struct rmi_data *data = hid_get_drvdata(hdev); | |
391 | ||
392 | if ((data->device_flags & RMI_DEVICE) && | |
393 | (field->application == HID_GD_POINTER || | |
394 | field->application == HID_GD_MOUSE)) { | |
79364d87 AD |
395 | if (data->device_flags & RMI_DEVICE_HAS_PHYS_BUTTONS) { |
396 | if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) | |
397 | return 0; | |
398 | ||
399 | if ((usage->hid == HID_GD_X || usage->hid == HID_GD_Y) | |
400 | && !value) | |
401 | return 1; | |
402 | } | |
403 | ||
0b2c7a89 | 404 | schedule_work(&data->reset_work); |
2f43de60 | 405 | return 1; |
9fb6bf02 BT |
406 | } |
407 | ||
408 | return 0; | |
409 | } | |
410 | ||
a278e268 | 411 | #ifdef CONFIG_PM |
09256360 AD |
412 | static int rmi_suspend(struct hid_device *hdev, pm_message_t message) |
413 | { | |
7035f3a4 | 414 | struct rmi_data *data = hid_get_drvdata(hdev); |
0b2c7a89 | 415 | struct rmi_device *rmi_dev = data->xport.rmi_dev; |
09256360 AD |
416 | int ret; |
417 | ||
b786ae8e AD |
418 | if (!(data->device_flags & RMI_DEVICE)) |
419 | return 0; | |
420 | ||
0b2c7a89 | 421 | ret = rmi_driver_suspend(rmi_dev, false); |
09256360 | 422 | if (ret) { |
0b2c7a89 | 423 | hid_warn(hdev, "Failed to suspend device: %d\n", ret); |
09256360 AD |
424 | return ret; |
425 | } | |
426 | ||
0b2c7a89 | 427 | return 0; |
9fb6bf02 BT |
428 | } |
429 | ||
430 | static int rmi_post_resume(struct hid_device *hdev) | |
431 | { | |
b786ae8e | 432 | struct rmi_data *data = hid_get_drvdata(hdev); |
0b2c7a89 AD |
433 | struct rmi_device *rmi_dev = data->xport.rmi_dev; |
434 | int ret; | |
b786ae8e AD |
435 | |
436 | if (!(data->device_flags & RMI_DEVICE)) | |
437 | return 0; | |
438 | ||
f5ff6ef0 L |
439 | /* Make sure the HID device is ready to receive events */ |
440 | ret = hid_hw_open(hdev); | |
0b2c7a89 | 441 | if (ret) |
05ba999f | 442 | return ret; |
8414947a | 443 | |
f5ff6ef0 L |
444 | ret = rmi_reset_attn_mode(hdev); |
445 | if (ret) | |
446 | goto out; | |
447 | ||
0b2c7a89 | 448 | ret = rmi_driver_resume(rmi_dev, false); |
9fb6bf02 | 449 | if (ret) { |
0b2c7a89 | 450 | hid_warn(hdev, "Failed to resume device: %d\n", ret); |
f5ff6ef0 | 451 | goto out; |
9fb6bf02 BT |
452 | } |
453 | ||
f5ff6ef0 L |
454 | out: |
455 | hid_hw_close(hdev); | |
456 | return ret; | |
9fb6bf02 | 457 | } |
0b2c7a89 | 458 | #endif /* CONFIG_PM */ |
9fb6bf02 | 459 | |
0b2c7a89 | 460 | static int rmi_hid_reset(struct rmi_transport_dev *xport, u16 reset_addr) |
9fb6bf02 | 461 | { |
0b2c7a89 AD |
462 | struct rmi_data *data = container_of(xport, struct rmi_data, xport); |
463 | struct hid_device *hdev = data->hdev; | |
9fb6bf02 | 464 | |
0b2c7a89 | 465 | return rmi_reset_attn_mode(hdev); |
9fb6bf02 BT |
466 | } |
467 | ||
9154301a | 468 | static int rmi_input_configured(struct hid_device *hdev, struct hid_input *hi) |
9fb6bf02 BT |
469 | { |
470 | struct rmi_data *data = hid_get_drvdata(hdev); | |
471 | struct input_dev *input = hi->input; | |
0b2c7a89 AD |
472 | int ret = 0; |
473 | ||
474 | if (!(data->device_flags & RMI_DEVICE)) | |
475 | return 0; | |
9fb6bf02 | 476 | |
0b2c7a89 | 477 | data->xport.input = input; |
9fb6bf02 BT |
478 | |
479 | hid_dbg(hdev, "Opening low level driver\n"); | |
480 | ret = hid_hw_open(hdev); | |
481 | if (ret) | |
9154301a | 482 | return ret; |
9fb6bf02 BT |
483 | |
484 | /* Allow incoming hid reports */ | |
485 | hid_device_io_start(hdev); | |
486 | ||
487 | ret = rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS); | |
488 | if (ret < 0) { | |
489 | dev_err(&hdev->dev, "failed to set rmi mode\n"); | |
490 | goto exit; | |
491 | } | |
492 | ||
493 | ret = rmi_set_page(hdev, 0); | |
494 | if (ret < 0) { | |
495 | dev_err(&hdev->dev, "failed to set page select to 0.\n"); | |
496 | goto exit; | |
497 | } | |
498 | ||
0b2c7a89 AD |
499 | ret = rmi_register_transport_device(&data->xport); |
500 | if (ret < 0) { | |
501 | dev_err(&hdev->dev, "failed to register transport driver\n"); | |
9154301a | 502 | goto exit; |
9fb6bf02 BT |
503 | } |
504 | ||
505 | set_bit(RMI_STARTED, &data->flags); | |
506 | ||
507 | exit: | |
508 | hid_device_io_stop(hdev); | |
509 | hid_hw_close(hdev); | |
9154301a | 510 | return ret; |
9fb6bf02 BT |
511 | } |
512 | ||
513 | static int rmi_input_mapping(struct hid_device *hdev, | |
514 | struct hid_input *hi, struct hid_field *field, | |
515 | struct hid_usage *usage, unsigned long **bit, int *max) | |
516 | { | |
2f43de60 AD |
517 | struct rmi_data *data = hid_get_drvdata(hdev); |
518 | ||
519 | /* | |
520 | * we want to make HID ignore the advertised HID collection | |
521 | * for RMI deivces | |
522 | */ | |
79364d87 AD |
523 | if (data->device_flags & RMI_DEVICE) { |
524 | if ((data->device_flags & RMI_DEVICE_HAS_PHYS_BUTTONS) && | |
525 | ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)) | |
526 | return 0; | |
527 | ||
2f43de60 | 528 | return -1; |
79364d87 | 529 | } |
2f43de60 AD |
530 | |
531 | return 0; | |
532 | } | |
533 | ||
534 | static int rmi_check_valid_report_id(struct hid_device *hdev, unsigned type, | |
535 | unsigned id, struct hid_report **report) | |
536 | { | |
537 | int i; | |
538 | ||
539 | *report = hdev->report_enum[type].report_id_hash[id]; | |
540 | if (*report) { | |
541 | for (i = 0; i < (*report)->maxfield; i++) { | |
542 | unsigned app = (*report)->field[i]->application; | |
543 | if ((app & HID_USAGE_PAGE) >= HID_UP_MSVENDOR) | |
544 | return 1; | |
545 | } | |
546 | } | |
547 | ||
548 | return 0; | |
9fb6bf02 BT |
549 | } |
550 | ||
0b2c7a89 AD |
551 | static struct rmi_device_platform_data rmi_hid_pdata = { |
552 | .sensor_pdata = { | |
553 | .sensor_type = rmi_sensor_touchpad, | |
554 | .axis_align.flip_y = true, | |
555 | .dribble = RMI_REG_STATE_ON, | |
556 | .palm_detect = RMI_REG_STATE_OFF, | |
557 | }, | |
558 | }; | |
559 | ||
560 | static const struct rmi_transport_ops hid_rmi_ops = { | |
561 | .write_block = rmi_hid_write_block, | |
562 | .read_block = rmi_hid_read_block, | |
563 | .reset = rmi_hid_reset, | |
564 | }; | |
565 | ||
566 | static void rmi_irq_teardown(void *data) | |
567 | { | |
568 | struct rmi_data *hdata = data; | |
569 | struct irq_domain *domain = hdata->domain; | |
570 | ||
571 | if (!domain) | |
572 | return; | |
573 | ||
574 | irq_dispose_mapping(irq_find_mapping(domain, 0)); | |
575 | ||
576 | irq_domain_remove(domain); | |
577 | hdata->domain = NULL; | |
578 | hdata->rmi_irq = 0; | |
579 | } | |
580 | ||
581 | static int rmi_irq_map(struct irq_domain *h, unsigned int virq, | |
582 | irq_hw_number_t hw_irq_num) | |
583 | { | |
584 | irq_set_chip_and_handler(virq, &dummy_irq_chip, handle_simple_irq); | |
585 | ||
586 | return 0; | |
587 | } | |
588 | ||
589 | static const struct irq_domain_ops rmi_irq_ops = { | |
590 | .map = rmi_irq_map, | |
591 | }; | |
592 | ||
593 | static int rmi_setup_irq_domain(struct hid_device *hdev) | |
594 | { | |
595 | struct rmi_data *hdata = hid_get_drvdata(hdev); | |
596 | int ret; | |
597 | ||
598 | hdata->domain = irq_domain_create_linear(hdev->dev.fwnode, 1, | |
599 | &rmi_irq_ops, hdata); | |
600 | if (!hdata->domain) | |
601 | return -ENOMEM; | |
602 | ||
603 | ret = devm_add_action_or_reset(&hdev->dev, &rmi_irq_teardown, hdata); | |
604 | if (ret) | |
605 | return ret; | |
606 | ||
607 | hdata->rmi_irq = irq_create_mapping(hdata->domain, 0); | |
608 | if (hdata->rmi_irq <= 0) { | |
609 | hid_err(hdev, "Can't allocate an IRQ\n"); | |
610 | return hdata->rmi_irq < 0 ? hdata->rmi_irq : -ENXIO; | |
611 | } | |
612 | ||
613 | return 0; | |
614 | } | |
615 | ||
9fb6bf02 BT |
616 | static int rmi_probe(struct hid_device *hdev, const struct hid_device_id *id) |
617 | { | |
618 | struct rmi_data *data = NULL; | |
619 | int ret; | |
620 | size_t alloc_size; | |
dd3edeb6 AD |
621 | struct hid_report *input_report; |
622 | struct hid_report *output_report; | |
2f43de60 | 623 | struct hid_report *feature_report; |
9fb6bf02 BT |
624 | |
625 | data = devm_kzalloc(&hdev->dev, sizeof(struct rmi_data), GFP_KERNEL); | |
626 | if (!data) | |
627 | return -ENOMEM; | |
628 | ||
629 | INIT_WORK(&data->reset_work, rmi_reset_work); | |
630 | data->hdev = hdev; | |
631 | ||
632 | hid_set_drvdata(hdev, data); | |
633 | ||
634 | hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS; | |
635 | ||
636 | ret = hid_parse(hdev); | |
637 | if (ret) { | |
638 | hid_err(hdev, "parse failed\n"); | |
639 | return ret; | |
640 | } | |
641 | ||
79364d87 AD |
642 | if (id->driver_data) |
643 | data->device_flags = id->driver_data; | |
644 | ||
2f43de60 AD |
645 | /* |
646 | * Check for the RMI specific report ids. If they are misisng | |
647 | * simply return and let the events be processed by hid-input | |
648 | */ | |
649 | if (!rmi_check_valid_report_id(hdev, HID_FEATURE_REPORT, | |
650 | RMI_SET_RMI_MODE_REPORT_ID, &feature_report)) { | |
651 | hid_dbg(hdev, "device does not have set mode feature report\n"); | |
652 | goto start; | |
653 | } | |
654 | ||
655 | if (!rmi_check_valid_report_id(hdev, HID_INPUT_REPORT, | |
656 | RMI_ATTN_REPORT_ID, &input_report)) { | |
657 | hid_dbg(hdev, "device does not have attention input report\n"); | |
658 | goto start; | |
dd3edeb6 AD |
659 | } |
660 | ||
b8aed6ea | 661 | data->input_report_size = hid_report_len(input_report); |
dd3edeb6 | 662 | |
2f43de60 AD |
663 | if (!rmi_check_valid_report_id(hdev, HID_OUTPUT_REPORT, |
664 | RMI_WRITE_REPORT_ID, &output_report)) { | |
665 | hid_dbg(hdev, | |
666 | "device does not have rmi write output report\n"); | |
667 | goto start; | |
dd3edeb6 AD |
668 | } |
669 | ||
b8aed6ea | 670 | data->output_report_size = hid_report_len(output_report); |
9fb6bf02 | 671 | |
2f43de60 | 672 | data->device_flags |= RMI_DEVICE; |
9fb6bf02 BT |
673 | alloc_size = data->output_report_size + data->input_report_size; |
674 | ||
675 | data->writeReport = devm_kzalloc(&hdev->dev, alloc_size, GFP_KERNEL); | |
676 | if (!data->writeReport) { | |
0b2c7a89 AD |
677 | hid_err(hdev, "failed to allocate buffer for HID reports\n"); |
678 | return -ENOMEM; | |
9fb6bf02 BT |
679 | } |
680 | ||
681 | data->readReport = data->writeReport + data->output_report_size; | |
682 | ||
683 | init_waitqueue_head(&data->wait); | |
684 | ||
685 | mutex_init(&data->page_mutex); | |
686 | ||
0b2c7a89 AD |
687 | ret = rmi_setup_irq_domain(hdev); |
688 | if (ret) { | |
689 | hid_err(hdev, "failed to allocate IRQ domain\n"); | |
690 | return ret; | |
691 | } | |
692 | ||
693 | if (data->device_flags & RMI_DEVICE_HAS_PHYS_BUTTONS) | |
694 | rmi_hid_pdata.f30_data.disable = true; | |
695 | ||
696 | data->xport.dev = hdev->dev.parent; | |
697 | data->xport.pdata = rmi_hid_pdata; | |
698 | data->xport.pdata.irq = data->rmi_irq; | |
699 | data->xport.proto_name = "hid"; | |
700 | data->xport.ops = &hid_rmi_ops; | |
701 | ||
2f43de60 | 702 | start: |
9fb6bf02 BT |
703 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); |
704 | if (ret) { | |
705 | hid_err(hdev, "hw start failed\n"); | |
706 | return ret; | |
707 | } | |
708 | ||
9fb6bf02 BT |
709 | return 0; |
710 | } | |
711 | ||
712 | static void rmi_remove(struct hid_device *hdev) | |
713 | { | |
714 | struct rmi_data *hdata = hid_get_drvdata(hdev); | |
715 | ||
716 | clear_bit(RMI_STARTED, &hdata->flags); | |
0b2c7a89 AD |
717 | cancel_work_sync(&hdata->reset_work); |
718 | rmi_unregister_transport_device(&hdata->xport); | |
9fb6bf02 BT |
719 | |
720 | hid_hw_stop(hdev); | |
721 | } | |
722 | ||
723 | static const struct hid_device_id rmi_id[] = { | |
e9287099 AD |
724 | { HID_USB_DEVICE(USB_VENDOR_ID_RAZER, USB_DEVICE_ID_RAZER_BLADE_14), |
725 | .driver_data = RMI_DEVICE_HAS_PHYS_BUTTONS }, | |
c7821d0f | 726 | { HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_X1_COVER) }, |
ba391e5a | 727 | { HID_DEVICE(HID_BUS_ANY, HID_GROUP_RMI, HID_ANY_ID, HID_ANY_ID) }, |
9fb6bf02 BT |
728 | { } |
729 | }; | |
730 | MODULE_DEVICE_TABLE(hid, rmi_id); | |
731 | ||
732 | static struct hid_driver rmi_driver = { | |
733 | .name = "hid-rmi", | |
734 | .id_table = rmi_id, | |
735 | .probe = rmi_probe, | |
736 | .remove = rmi_remove, | |
2f43de60 | 737 | .event = rmi_event, |
9fb6bf02 BT |
738 | .raw_event = rmi_raw_event, |
739 | .input_mapping = rmi_input_mapping, | |
740 | .input_configured = rmi_input_configured, | |
741 | #ifdef CONFIG_PM | |
09256360 | 742 | .suspend = rmi_suspend, |
9fb6bf02 | 743 | .resume = rmi_post_resume, |
0b2c7a89 | 744 | .reset_resume = rmi_post_resume, |
9fb6bf02 BT |
745 | #endif |
746 | }; | |
747 | ||
748 | module_hid_driver(rmi_driver); | |
749 | ||
750 | MODULE_AUTHOR("Andrew Duggan <aduggan@synaptics.com>"); | |
751 | MODULE_DESCRIPTION("RMI HID driver"); | |
752 | MODULE_LICENSE("GPL"); |