Commit | Line | Data |
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2874c5fd | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
9fb6bf02 BT |
2 | /* |
3 | * Copyright (c) 2013 Andrew Duggan <aduggan@synaptics.com> | |
4 | * Copyright (c) 2013 Synaptics Incorporated | |
5 | * Copyright (c) 2014 Benjamin Tissoires <benjamin.tissoires@gmail.com> | |
6 | * Copyright (c) 2014 Red Hat, Inc | |
9fb6bf02 BT |
7 | */ |
8 | ||
9 | #include <linux/kernel.h> | |
10 | #include <linux/hid.h> | |
11 | #include <linux/input.h> | |
12 | #include <linux/input/mt.h> | |
0b2c7a89 AD |
13 | #include <linux/irq.h> |
14 | #include <linux/irqdomain.h> | |
9fb6bf02 BT |
15 | #include <linux/module.h> |
16 | #include <linux/pm.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/wait.h> | |
19 | #include <linux/sched.h> | |
0b2c7a89 | 20 | #include <linux/rmi.h> |
9fb6bf02 BT |
21 | #include "hid-ids.h" |
22 | ||
23 | #define RMI_MOUSE_REPORT_ID 0x01 /* Mouse emulation Report */ | |
24 | #define RMI_WRITE_REPORT_ID 0x09 /* Output Report */ | |
25 | #define RMI_READ_ADDR_REPORT_ID 0x0a /* Output Report */ | |
26 | #define RMI_READ_DATA_REPORT_ID 0x0b /* Input Report */ | |
27 | #define RMI_ATTN_REPORT_ID 0x0c /* Input Report */ | |
28 | #define RMI_SET_RMI_MODE_REPORT_ID 0x0f /* Feature Report */ | |
29 | ||
30 | /* flags */ | |
af43c408 DC |
31 | #define RMI_READ_REQUEST_PENDING 0 |
32 | #define RMI_READ_DATA_PENDING 1 | |
33 | #define RMI_STARTED 2 | |
9fb6bf02 | 34 | |
2f43de60 AD |
35 | /* device flags */ |
36 | #define RMI_DEVICE BIT(0) | |
79364d87 | 37 | #define RMI_DEVICE_HAS_PHYS_BUTTONS BIT(1) |
10235380 | 38 | #define RMI_DEVICE_OUTPUT_SET_REPORT BIT(2) |
2f43de60 | 39 | |
7035f3a4 AD |
40 | /* |
41 | * retrieve the ctrl registers | |
42 | * the ctrl register has a size of 20 but a fw bug split it into 16 + 4, | |
43 | * and there is no way to know if the first 20 bytes are here or not. | |
44 | * We use only the first 12 bytes, so get only them. | |
45 | */ | |
46 | #define RMI_F11_CTRL_REG_COUNT 12 | |
47 | ||
9fb6bf02 BT |
48 | enum rmi_mode_type { |
49 | RMI_MODE_OFF = 0, | |
50 | RMI_MODE_ATTN_REPORTS = 1, | |
51 | RMI_MODE_NO_PACKED_ATTN_REPORTS = 2, | |
52 | }; | |
53 | ||
9fb6bf02 BT |
54 | /** |
55 | * struct rmi_data - stores information for hid communication | |
56 | * | |
57 | * @page_mutex: Locks current page to avoid changing pages in unexpected ways. | |
58 | * @page: Keeps track of the current virtual page | |
0b2c7a89 | 59 | * @xport: transport device to be registered with the RMI4 core. |
9fb6bf02 BT |
60 | * |
61 | * @wait: Used for waiting for read data | |
62 | * | |
63 | * @writeReport: output buffer when writing RMI registers | |
64 | * @readReport: input buffer when reading RMI registers | |
65 | * | |
66 | * @input_report_size: size of an input report (advertised by HID) | |
67 | * @output_report_size: size of an output report (advertised by HID) | |
68 | * | |
69 | * @flags: flags for the current device (started, reading, etc...) | |
70 | * | |
9fb6bf02 BT |
71 | * @reset_work: worker which will be called in case of a mouse report |
72 | * @hdev: pointer to the struct hid_device | |
0b2c7a89 AD |
73 | * |
74 | * @device_flags: flags which describe the device | |
75 | * | |
76 | * @domain: the IRQ domain allocated for this RMI4 device | |
77 | * @rmi_irq: the irq that will be used to generate events to rmi-core | |
9fb6bf02 BT |
78 | */ |
79 | struct rmi_data { | |
80 | struct mutex page_mutex; | |
81 | int page; | |
0b2c7a89 | 82 | struct rmi_transport_dev xport; |
9fb6bf02 BT |
83 | |
84 | wait_queue_head_t wait; | |
85 | ||
86 | u8 *writeReport; | |
87 | u8 *readReport; | |
88 | ||
3064a03b AM |
89 | u32 input_report_size; |
90 | u32 output_report_size; | |
9fb6bf02 BT |
91 | |
92 | unsigned long flags; | |
93 | ||
9fb6bf02 BT |
94 | struct work_struct reset_work; |
95 | struct hid_device *hdev; | |
2f43de60 AD |
96 | |
97 | unsigned long device_flags; | |
09256360 | 98 | |
0b2c7a89 AD |
99 | struct irq_domain *domain; |
100 | int rmi_irq; | |
9fb6bf02 BT |
101 | }; |
102 | ||
103 | #define RMI_PAGE(addr) (((addr) >> 8) & 0xff) | |
104 | ||
105 | static int rmi_write_report(struct hid_device *hdev, u8 *report, int len); | |
106 | ||
107 | /** | |
108 | * rmi_set_page - Set RMI page | |
109 | * @hdev: The pointer to the hid_device struct | |
110 | * @page: The new page address. | |
111 | * | |
112 | * RMI devices have 16-bit addressing, but some of the physical | |
113 | * implementations (like SMBus) only have 8-bit addressing. So RMI implements | |
114 | * a page address at 0xff of every page so we can reliable page addresses | |
115 | * every 256 registers. | |
116 | * | |
117 | * The page_mutex lock must be held when this function is entered. | |
118 | * | |
119 | * Returns zero on success, non-zero on failure. | |
120 | */ | |
121 | static int rmi_set_page(struct hid_device *hdev, u8 page) | |
122 | { | |
123 | struct rmi_data *data = hid_get_drvdata(hdev); | |
124 | int retval; | |
125 | ||
126 | data->writeReport[0] = RMI_WRITE_REPORT_ID; | |
127 | data->writeReport[1] = 1; | |
128 | data->writeReport[2] = 0xFF; | |
129 | data->writeReport[4] = page; | |
130 | ||
131 | retval = rmi_write_report(hdev, data->writeReport, | |
132 | data->output_report_size); | |
133 | if (retval != data->output_report_size) { | |
134 | dev_err(&hdev->dev, | |
135 | "%s: set page failed: %d.", __func__, retval); | |
136 | return retval; | |
137 | } | |
138 | ||
139 | data->page = page; | |
140 | return 0; | |
141 | } | |
142 | ||
143 | static int rmi_set_mode(struct hid_device *hdev, u8 mode) | |
144 | { | |
145 | int ret; | |
6dab07df BT |
146 | const u8 txbuf[2] = {RMI_SET_RMI_MODE_REPORT_ID, mode}; |
147 | u8 *buf; | |
9fb6bf02 | 148 | |
6dab07df BT |
149 | buf = kmemdup(txbuf, sizeof(txbuf), GFP_KERNEL); |
150 | if (!buf) | |
151 | return -ENOMEM; | |
152 | ||
153 | ret = hid_hw_raw_request(hdev, RMI_SET_RMI_MODE_REPORT_ID, buf, | |
9fb6bf02 | 154 | sizeof(txbuf), HID_FEATURE_REPORT, HID_REQ_SET_REPORT); |
6dab07df | 155 | kfree(buf); |
9fb6bf02 BT |
156 | if (ret < 0) { |
157 | dev_err(&hdev->dev, "unable to set rmi mode to %d (%d)\n", mode, | |
158 | ret); | |
159 | return ret; | |
160 | } | |
161 | ||
162 | return 0; | |
163 | } | |
164 | ||
165 | static int rmi_write_report(struct hid_device *hdev, u8 *report, int len) | |
166 | { | |
10235380 | 167 | struct rmi_data *data = hid_get_drvdata(hdev); |
9fb6bf02 BT |
168 | int ret; |
169 | ||
10235380 TA |
170 | if (data->device_flags & RMI_DEVICE_OUTPUT_SET_REPORT) { |
171 | /* | |
172 | * Talk to device by using SET_REPORT requests instead. | |
173 | */ | |
174 | ret = hid_hw_raw_request(hdev, report[0], report, | |
175 | len, HID_OUTPUT_REPORT, HID_REQ_SET_REPORT); | |
176 | } else { | |
177 | ret = hid_hw_output_report(hdev, (void *)report, len); | |
178 | } | |
179 | ||
9fb6bf02 BT |
180 | if (ret < 0) { |
181 | dev_err(&hdev->dev, "failed to write hid report (%d)\n", ret); | |
182 | return ret; | |
183 | } | |
184 | ||
185 | return ret; | |
186 | } | |
187 | ||
0b2c7a89 AD |
188 | static int rmi_hid_read_block(struct rmi_transport_dev *xport, u16 addr, |
189 | void *buf, size_t len) | |
9fb6bf02 | 190 | { |
0b2c7a89 AD |
191 | struct rmi_data *data = container_of(xport, struct rmi_data, xport); |
192 | struct hid_device *hdev = data->hdev; | |
9fb6bf02 BT |
193 | int ret; |
194 | int bytes_read; | |
195 | int bytes_needed; | |
196 | int retries; | |
197 | int read_input_count; | |
198 | ||
199 | mutex_lock(&data->page_mutex); | |
200 | ||
201 | if (RMI_PAGE(addr) != data->page) { | |
202 | ret = rmi_set_page(hdev, RMI_PAGE(addr)); | |
203 | if (ret < 0) | |
204 | goto exit; | |
205 | } | |
206 | ||
207 | for (retries = 5; retries > 0; retries--) { | |
208 | data->writeReport[0] = RMI_READ_ADDR_REPORT_ID; | |
209 | data->writeReport[1] = 0; /* old 1 byte read count */ | |
210 | data->writeReport[2] = addr & 0xFF; | |
211 | data->writeReport[3] = (addr >> 8) & 0xFF; | |
212 | data->writeReport[4] = len & 0xFF; | |
213 | data->writeReport[5] = (len >> 8) & 0xFF; | |
214 | ||
215 | set_bit(RMI_READ_REQUEST_PENDING, &data->flags); | |
216 | ||
217 | ret = rmi_write_report(hdev, data->writeReport, | |
218 | data->output_report_size); | |
219 | if (ret != data->output_report_size) { | |
220 | clear_bit(RMI_READ_REQUEST_PENDING, &data->flags); | |
221 | dev_err(&hdev->dev, | |
222 | "failed to write request output report (%d)\n", | |
223 | ret); | |
224 | goto exit; | |
225 | } | |
226 | ||
227 | bytes_read = 0; | |
228 | bytes_needed = len; | |
229 | while (bytes_read < len) { | |
230 | if (!wait_event_timeout(data->wait, | |
231 | test_bit(RMI_READ_DATA_PENDING, &data->flags), | |
232 | msecs_to_jiffies(1000))) { | |
233 | hid_warn(hdev, "%s: timeout elapsed\n", | |
234 | __func__); | |
235 | ret = -EAGAIN; | |
236 | break; | |
237 | } | |
238 | ||
239 | read_input_count = data->readReport[1]; | |
240 | memcpy(buf + bytes_read, &data->readReport[2], | |
241 | read_input_count < bytes_needed ? | |
242 | read_input_count : bytes_needed); | |
243 | ||
244 | bytes_read += read_input_count; | |
245 | bytes_needed -= read_input_count; | |
246 | clear_bit(RMI_READ_DATA_PENDING, &data->flags); | |
247 | } | |
248 | ||
249 | if (ret >= 0) { | |
250 | ret = 0; | |
251 | break; | |
252 | } | |
253 | } | |
254 | ||
255 | exit: | |
256 | clear_bit(RMI_READ_REQUEST_PENDING, &data->flags); | |
257 | mutex_unlock(&data->page_mutex); | |
258 | return ret; | |
259 | } | |
260 | ||
0b2c7a89 AD |
261 | static int rmi_hid_write_block(struct rmi_transport_dev *xport, u16 addr, |
262 | const void *buf, size_t len) | |
dd8df284 | 263 | { |
0b2c7a89 AD |
264 | struct rmi_data *data = container_of(xport, struct rmi_data, xport); |
265 | struct hid_device *hdev = data->hdev; | |
dd8df284 AD |
266 | int ret; |
267 | ||
268 | mutex_lock(&data->page_mutex); | |
269 | ||
270 | if (RMI_PAGE(addr) != data->page) { | |
271 | ret = rmi_set_page(hdev, RMI_PAGE(addr)); | |
272 | if (ret < 0) | |
273 | goto exit; | |
274 | } | |
275 | ||
276 | data->writeReport[0] = RMI_WRITE_REPORT_ID; | |
277 | data->writeReport[1] = len; | |
278 | data->writeReport[2] = addr & 0xFF; | |
279 | data->writeReport[3] = (addr >> 8) & 0xFF; | |
280 | memcpy(&data->writeReport[4], buf, len); | |
281 | ||
282 | ret = rmi_write_report(hdev, data->writeReport, | |
283 | data->output_report_size); | |
284 | if (ret < 0) { | |
285 | dev_err(&hdev->dev, | |
286 | "failed to write request output report (%d)\n", | |
287 | ret); | |
288 | goto exit; | |
289 | } | |
290 | ret = 0; | |
291 | ||
292 | exit: | |
293 | mutex_unlock(&data->page_mutex); | |
294 | return ret; | |
295 | } | |
296 | ||
9a98b338 AD |
297 | static int rmi_reset_attn_mode(struct hid_device *hdev) |
298 | { | |
299 | struct rmi_data *data = hid_get_drvdata(hdev); | |
0b2c7a89 | 300 | struct rmi_device *rmi_dev = data->xport.rmi_dev; |
9a98b338 AD |
301 | int ret; |
302 | ||
303 | ret = rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS); | |
304 | if (ret) | |
305 | return ret; | |
306 | ||
0b2c7a89 AD |
307 | if (test_bit(RMI_STARTED, &data->flags)) |
308 | ret = rmi_dev->driver->reset_handler(rmi_dev); | |
9a98b338 | 309 | |
0b2c7a89 | 310 | return ret; |
9a98b338 AD |
311 | } |
312 | ||
9fb6bf02 BT |
313 | static void rmi_reset_work(struct work_struct *work) |
314 | { | |
315 | struct rmi_data *hdata = container_of(work, struct rmi_data, | |
316 | reset_work); | |
317 | ||
318 | /* switch the device to RMI if we receive a generic mouse report */ | |
9a98b338 | 319 | rmi_reset_attn_mode(hdata->hdev); |
9fb6bf02 BT |
320 | } |
321 | ||
0b2c7a89 | 322 | static int rmi_input_event(struct hid_device *hdev, u8 *data, int size) |
9fb6bf02 BT |
323 | { |
324 | struct rmi_data *hdata = hid_get_drvdata(hdev); | |
0b2c7a89 AD |
325 | struct rmi_device *rmi_dev = hdata->xport.rmi_dev; |
326 | unsigned long flags; | |
9fb6bf02 | 327 | |
0b2c7a89 | 328 | if (!(test_bit(RMI_STARTED, &hdata->flags))) |
9fb6bf02 BT |
329 | return 0; |
330 | ||
0b2c7a89 | 331 | local_irq_save(flags); |
5b65c2a0 | 332 | |
0b2c7a89 | 333 | rmi_set_attn_data(rmi_dev, data[1], &data[2], size - 2); |
9fb6bf02 | 334 | |
0b2c7a89 | 335 | generic_handle_irq(hdata->rmi_irq); |
9fb6bf02 | 336 | |
0b2c7a89 | 337 | local_irq_restore(flags); |
9fb6bf02 BT |
338 | |
339 | return 1; | |
340 | } | |
341 | ||
342 | static int rmi_read_data_event(struct hid_device *hdev, u8 *data, int size) | |
343 | { | |
344 | struct rmi_data *hdata = hid_get_drvdata(hdev); | |
345 | ||
346 | if (!test_bit(RMI_READ_REQUEST_PENDING, &hdata->flags)) { | |
01a5f8a4 | 347 | hid_dbg(hdev, "no read request pending\n"); |
9fb6bf02 BT |
348 | return 0; |
349 | } | |
350 | ||
351 | memcpy(hdata->readReport, data, size < hdata->input_report_size ? | |
352 | size : hdata->input_report_size); | |
353 | set_bit(RMI_READ_DATA_PENDING, &hdata->flags); | |
354 | wake_up(&hdata->wait); | |
355 | ||
356 | return 1; | |
357 | } | |
358 | ||
5b65c2a0 BT |
359 | static int rmi_check_sanity(struct hid_device *hdev, u8 *data, int size) |
360 | { | |
361 | int valid_size = size; | |
362 | /* | |
363 | * On the Dell XPS 13 9333, the bus sometimes get confused and fills | |
364 | * the report with a sentinel value "ff". Synaptics told us that such | |
365 | * behavior does not comes from the touchpad itself, so we filter out | |
366 | * such reports here. | |
367 | */ | |
368 | ||
369 | while ((data[valid_size - 1] == 0xff) && valid_size > 0) | |
370 | valid_size--; | |
371 | ||
372 | return valid_size; | |
373 | } | |
374 | ||
9fb6bf02 BT |
375 | static int rmi_raw_event(struct hid_device *hdev, |
376 | struct hid_report *report, u8 *data, int size) | |
377 | { | |
ef14a4bf AD |
378 | struct rmi_data *hdata = hid_get_drvdata(hdev); |
379 | ||
380 | if (!(hdata->device_flags & RMI_DEVICE)) | |
381 | return 0; | |
382 | ||
5b65c2a0 BT |
383 | size = rmi_check_sanity(hdev, data, size); |
384 | if (size < 2) | |
385 | return 0; | |
386 | ||
9fb6bf02 BT |
387 | switch (data[0]) { |
388 | case RMI_READ_DATA_REPORT_ID: | |
389 | return rmi_read_data_event(hdev, data, size); | |
390 | case RMI_ATTN_REPORT_ID: | |
391 | return rmi_input_event(hdev, data, size); | |
2f43de60 AD |
392 | default: |
393 | return 1; | |
394 | } | |
395 | ||
396 | return 0; | |
397 | } | |
398 | ||
399 | static int rmi_event(struct hid_device *hdev, struct hid_field *field, | |
400 | struct hid_usage *usage, __s32 value) | |
401 | { | |
402 | struct rmi_data *data = hid_get_drvdata(hdev); | |
403 | ||
404 | if ((data->device_flags & RMI_DEVICE) && | |
405 | (field->application == HID_GD_POINTER || | |
406 | field->application == HID_GD_MOUSE)) { | |
79364d87 AD |
407 | if (data->device_flags & RMI_DEVICE_HAS_PHYS_BUTTONS) { |
408 | if ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON) | |
409 | return 0; | |
410 | ||
411 | if ((usage->hid == HID_GD_X || usage->hid == HID_GD_Y) | |
412 | && !value) | |
413 | return 1; | |
414 | } | |
415 | ||
0b2c7a89 | 416 | schedule_work(&data->reset_work); |
2f43de60 | 417 | return 1; |
9fb6bf02 BT |
418 | } |
419 | ||
420 | return 0; | |
421 | } | |
422 | ||
c94ba060 BT |
423 | static void rmi_report(struct hid_device *hid, struct hid_report *report) |
424 | { | |
425 | struct hid_field *field = report->field[0]; | |
426 | ||
427 | if (!(hid->claimed & HID_CLAIMED_INPUT)) | |
428 | return; | |
429 | ||
430 | switch (report->id) { | |
431 | case RMI_READ_DATA_REPORT_ID: | |
432 | /* fall-through */ | |
433 | case RMI_ATTN_REPORT_ID: | |
434 | return; | |
435 | } | |
436 | ||
437 | if (field && field->hidinput && field->hidinput->input) | |
438 | input_sync(field->hidinput->input); | |
439 | } | |
440 | ||
a278e268 | 441 | #ifdef CONFIG_PM |
09256360 AD |
442 | static int rmi_suspend(struct hid_device *hdev, pm_message_t message) |
443 | { | |
7035f3a4 | 444 | struct rmi_data *data = hid_get_drvdata(hdev); |
0b2c7a89 | 445 | struct rmi_device *rmi_dev = data->xport.rmi_dev; |
09256360 AD |
446 | int ret; |
447 | ||
b786ae8e AD |
448 | if (!(data->device_flags & RMI_DEVICE)) |
449 | return 0; | |
450 | ||
0b2c7a89 | 451 | ret = rmi_driver_suspend(rmi_dev, false); |
09256360 | 452 | if (ret) { |
0b2c7a89 | 453 | hid_warn(hdev, "Failed to suspend device: %d\n", ret); |
09256360 AD |
454 | return ret; |
455 | } | |
456 | ||
0b2c7a89 | 457 | return 0; |
9fb6bf02 BT |
458 | } |
459 | ||
460 | static int rmi_post_resume(struct hid_device *hdev) | |
461 | { | |
b786ae8e | 462 | struct rmi_data *data = hid_get_drvdata(hdev); |
0b2c7a89 AD |
463 | struct rmi_device *rmi_dev = data->xport.rmi_dev; |
464 | int ret; | |
b786ae8e AD |
465 | |
466 | if (!(data->device_flags & RMI_DEVICE)) | |
467 | return 0; | |
468 | ||
cac72b99 L |
469 | /* Make sure the HID device is ready to receive events */ |
470 | ret = hid_hw_open(hdev); | |
0b2c7a89 | 471 | if (ret) |
05ba999f | 472 | return ret; |
8414947a | 473 | |
cac72b99 L |
474 | ret = rmi_reset_attn_mode(hdev); |
475 | if (ret) | |
476 | goto out; | |
477 | ||
0b2c7a89 | 478 | ret = rmi_driver_resume(rmi_dev, false); |
9fb6bf02 | 479 | if (ret) { |
0b2c7a89 | 480 | hid_warn(hdev, "Failed to resume device: %d\n", ret); |
cac72b99 | 481 | goto out; |
9fb6bf02 BT |
482 | } |
483 | ||
cac72b99 L |
484 | out: |
485 | hid_hw_close(hdev); | |
486 | return ret; | |
9fb6bf02 | 487 | } |
0b2c7a89 | 488 | #endif /* CONFIG_PM */ |
9fb6bf02 | 489 | |
0b2c7a89 | 490 | static int rmi_hid_reset(struct rmi_transport_dev *xport, u16 reset_addr) |
9fb6bf02 | 491 | { |
0b2c7a89 AD |
492 | struct rmi_data *data = container_of(xport, struct rmi_data, xport); |
493 | struct hid_device *hdev = data->hdev; | |
9fb6bf02 | 494 | |
0b2c7a89 | 495 | return rmi_reset_attn_mode(hdev); |
9fb6bf02 BT |
496 | } |
497 | ||
9154301a | 498 | static int rmi_input_configured(struct hid_device *hdev, struct hid_input *hi) |
9fb6bf02 BT |
499 | { |
500 | struct rmi_data *data = hid_get_drvdata(hdev); | |
501 | struct input_dev *input = hi->input; | |
0b2c7a89 AD |
502 | int ret = 0; |
503 | ||
504 | if (!(data->device_flags & RMI_DEVICE)) | |
505 | return 0; | |
9fb6bf02 | 506 | |
0b2c7a89 | 507 | data->xport.input = input; |
9fb6bf02 BT |
508 | |
509 | hid_dbg(hdev, "Opening low level driver\n"); | |
510 | ret = hid_hw_open(hdev); | |
511 | if (ret) | |
9154301a | 512 | return ret; |
9fb6bf02 BT |
513 | |
514 | /* Allow incoming hid reports */ | |
515 | hid_device_io_start(hdev); | |
516 | ||
517 | ret = rmi_set_mode(hdev, RMI_MODE_ATTN_REPORTS); | |
518 | if (ret < 0) { | |
519 | dev_err(&hdev->dev, "failed to set rmi mode\n"); | |
520 | goto exit; | |
521 | } | |
522 | ||
523 | ret = rmi_set_page(hdev, 0); | |
524 | if (ret < 0) { | |
525 | dev_err(&hdev->dev, "failed to set page select to 0.\n"); | |
526 | goto exit; | |
527 | } | |
528 | ||
0b2c7a89 AD |
529 | ret = rmi_register_transport_device(&data->xport); |
530 | if (ret < 0) { | |
531 | dev_err(&hdev->dev, "failed to register transport driver\n"); | |
9154301a | 532 | goto exit; |
9fb6bf02 BT |
533 | } |
534 | ||
535 | set_bit(RMI_STARTED, &data->flags); | |
536 | ||
537 | exit: | |
538 | hid_device_io_stop(hdev); | |
539 | hid_hw_close(hdev); | |
9154301a | 540 | return ret; |
9fb6bf02 BT |
541 | } |
542 | ||
543 | static int rmi_input_mapping(struct hid_device *hdev, | |
544 | struct hid_input *hi, struct hid_field *field, | |
545 | struct hid_usage *usage, unsigned long **bit, int *max) | |
546 | { | |
2f43de60 AD |
547 | struct rmi_data *data = hid_get_drvdata(hdev); |
548 | ||
549 | /* | |
550 | * we want to make HID ignore the advertised HID collection | |
551 | * for RMI deivces | |
552 | */ | |
79364d87 AD |
553 | if (data->device_flags & RMI_DEVICE) { |
554 | if ((data->device_flags & RMI_DEVICE_HAS_PHYS_BUTTONS) && | |
555 | ((usage->hid & HID_USAGE_PAGE) == HID_UP_BUTTON)) | |
556 | return 0; | |
557 | ||
2f43de60 | 558 | return -1; |
79364d87 | 559 | } |
2f43de60 AD |
560 | |
561 | return 0; | |
562 | } | |
563 | ||
564 | static int rmi_check_valid_report_id(struct hid_device *hdev, unsigned type, | |
565 | unsigned id, struct hid_report **report) | |
566 | { | |
567 | int i; | |
568 | ||
569 | *report = hdev->report_enum[type].report_id_hash[id]; | |
570 | if (*report) { | |
571 | for (i = 0; i < (*report)->maxfield; i++) { | |
572 | unsigned app = (*report)->field[i]->application; | |
573 | if ((app & HID_USAGE_PAGE) >= HID_UP_MSVENDOR) | |
574 | return 1; | |
575 | } | |
576 | } | |
577 | ||
578 | return 0; | |
9fb6bf02 BT |
579 | } |
580 | ||
0b2c7a89 AD |
581 | static struct rmi_device_platform_data rmi_hid_pdata = { |
582 | .sensor_pdata = { | |
583 | .sensor_type = rmi_sensor_touchpad, | |
584 | .axis_align.flip_y = true, | |
585 | .dribble = RMI_REG_STATE_ON, | |
586 | .palm_detect = RMI_REG_STATE_OFF, | |
587 | }, | |
588 | }; | |
589 | ||
590 | static const struct rmi_transport_ops hid_rmi_ops = { | |
591 | .write_block = rmi_hid_write_block, | |
592 | .read_block = rmi_hid_read_block, | |
593 | .reset = rmi_hid_reset, | |
594 | }; | |
595 | ||
596 | static void rmi_irq_teardown(void *data) | |
597 | { | |
598 | struct rmi_data *hdata = data; | |
599 | struct irq_domain *domain = hdata->domain; | |
600 | ||
601 | if (!domain) | |
602 | return; | |
603 | ||
604 | irq_dispose_mapping(irq_find_mapping(domain, 0)); | |
605 | ||
606 | irq_domain_remove(domain); | |
607 | hdata->domain = NULL; | |
608 | hdata->rmi_irq = 0; | |
609 | } | |
610 | ||
611 | static int rmi_irq_map(struct irq_domain *h, unsigned int virq, | |
612 | irq_hw_number_t hw_irq_num) | |
613 | { | |
614 | irq_set_chip_and_handler(virq, &dummy_irq_chip, handle_simple_irq); | |
615 | ||
616 | return 0; | |
617 | } | |
618 | ||
619 | static const struct irq_domain_ops rmi_irq_ops = { | |
620 | .map = rmi_irq_map, | |
621 | }; | |
622 | ||
623 | static int rmi_setup_irq_domain(struct hid_device *hdev) | |
624 | { | |
625 | struct rmi_data *hdata = hid_get_drvdata(hdev); | |
626 | int ret; | |
627 | ||
628 | hdata->domain = irq_domain_create_linear(hdev->dev.fwnode, 1, | |
629 | &rmi_irq_ops, hdata); | |
630 | if (!hdata->domain) | |
631 | return -ENOMEM; | |
632 | ||
633 | ret = devm_add_action_or_reset(&hdev->dev, &rmi_irq_teardown, hdata); | |
634 | if (ret) | |
635 | return ret; | |
636 | ||
637 | hdata->rmi_irq = irq_create_mapping(hdata->domain, 0); | |
638 | if (hdata->rmi_irq <= 0) { | |
639 | hid_err(hdev, "Can't allocate an IRQ\n"); | |
640 | return hdata->rmi_irq < 0 ? hdata->rmi_irq : -ENXIO; | |
641 | } | |
642 | ||
643 | return 0; | |
644 | } | |
645 | ||
9fb6bf02 BT |
646 | static int rmi_probe(struct hid_device *hdev, const struct hid_device_id *id) |
647 | { | |
648 | struct rmi_data *data = NULL; | |
649 | int ret; | |
650 | size_t alloc_size; | |
dd3edeb6 AD |
651 | struct hid_report *input_report; |
652 | struct hid_report *output_report; | |
2f43de60 | 653 | struct hid_report *feature_report; |
9fb6bf02 BT |
654 | |
655 | data = devm_kzalloc(&hdev->dev, sizeof(struct rmi_data), GFP_KERNEL); | |
656 | if (!data) | |
657 | return -ENOMEM; | |
658 | ||
659 | INIT_WORK(&data->reset_work, rmi_reset_work); | |
660 | data->hdev = hdev; | |
661 | ||
662 | hid_set_drvdata(hdev, data); | |
663 | ||
664 | hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS; | |
c94ba060 | 665 | hdev->quirks |= HID_QUIRK_NO_INPUT_SYNC; |
9fb6bf02 BT |
666 | |
667 | ret = hid_parse(hdev); | |
668 | if (ret) { | |
669 | hid_err(hdev, "parse failed\n"); | |
670 | return ret; | |
671 | } | |
672 | ||
79364d87 AD |
673 | if (id->driver_data) |
674 | data->device_flags = id->driver_data; | |
675 | ||
2f43de60 AD |
676 | /* |
677 | * Check for the RMI specific report ids. If they are misisng | |
678 | * simply return and let the events be processed by hid-input | |
679 | */ | |
680 | if (!rmi_check_valid_report_id(hdev, HID_FEATURE_REPORT, | |
681 | RMI_SET_RMI_MODE_REPORT_ID, &feature_report)) { | |
682 | hid_dbg(hdev, "device does not have set mode feature report\n"); | |
683 | goto start; | |
684 | } | |
685 | ||
686 | if (!rmi_check_valid_report_id(hdev, HID_INPUT_REPORT, | |
687 | RMI_ATTN_REPORT_ID, &input_report)) { | |
688 | hid_dbg(hdev, "device does not have attention input report\n"); | |
689 | goto start; | |
dd3edeb6 AD |
690 | } |
691 | ||
b8aed6ea | 692 | data->input_report_size = hid_report_len(input_report); |
dd3edeb6 | 693 | |
2f43de60 AD |
694 | if (!rmi_check_valid_report_id(hdev, HID_OUTPUT_REPORT, |
695 | RMI_WRITE_REPORT_ID, &output_report)) { | |
696 | hid_dbg(hdev, | |
697 | "device does not have rmi write output report\n"); | |
698 | goto start; | |
dd3edeb6 AD |
699 | } |
700 | ||
b8aed6ea | 701 | data->output_report_size = hid_report_len(output_report); |
9fb6bf02 | 702 | |
2f43de60 | 703 | data->device_flags |= RMI_DEVICE; |
9fb6bf02 BT |
704 | alloc_size = data->output_report_size + data->input_report_size; |
705 | ||
706 | data->writeReport = devm_kzalloc(&hdev->dev, alloc_size, GFP_KERNEL); | |
707 | if (!data->writeReport) { | |
0b2c7a89 AD |
708 | hid_err(hdev, "failed to allocate buffer for HID reports\n"); |
709 | return -ENOMEM; | |
9fb6bf02 BT |
710 | } |
711 | ||
712 | data->readReport = data->writeReport + data->output_report_size; | |
713 | ||
714 | init_waitqueue_head(&data->wait); | |
715 | ||
716 | mutex_init(&data->page_mutex); | |
717 | ||
0b2c7a89 AD |
718 | ret = rmi_setup_irq_domain(hdev); |
719 | if (ret) { | |
720 | hid_err(hdev, "failed to allocate IRQ domain\n"); | |
721 | return ret; | |
722 | } | |
723 | ||
724 | if (data->device_flags & RMI_DEVICE_HAS_PHYS_BUTTONS) | |
725 | rmi_hid_pdata.f30_data.disable = true; | |
726 | ||
727 | data->xport.dev = hdev->dev.parent; | |
728 | data->xport.pdata = rmi_hid_pdata; | |
729 | data->xport.pdata.irq = data->rmi_irq; | |
730 | data->xport.proto_name = "hid"; | |
731 | data->xport.ops = &hid_rmi_ops; | |
732 | ||
2f43de60 | 733 | start: |
9fb6bf02 BT |
734 | ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT); |
735 | if (ret) { | |
736 | hid_err(hdev, "hw start failed\n"); | |
737 | return ret; | |
738 | } | |
739 | ||
9fb6bf02 BT |
740 | return 0; |
741 | } | |
742 | ||
743 | static void rmi_remove(struct hid_device *hdev) | |
744 | { | |
745 | struct rmi_data *hdata = hid_get_drvdata(hdev); | |
746 | ||
ef14a4bf AD |
747 | if (hdata->device_flags & RMI_DEVICE) { |
748 | clear_bit(RMI_STARTED, &hdata->flags); | |
749 | cancel_work_sync(&hdata->reset_work); | |
750 | rmi_unregister_transport_device(&hdata->xport); | |
751 | } | |
9fb6bf02 BT |
752 | |
753 | hid_hw_stop(hdev); | |
754 | } | |
755 | ||
756 | static const struct hid_device_id rmi_id[] = { | |
e9287099 AD |
757 | { HID_USB_DEVICE(USB_VENDOR_ID_RAZER, USB_DEVICE_ID_RAZER_BLADE_14), |
758 | .driver_data = RMI_DEVICE_HAS_PHYS_BUTTONS }, | |
c7821d0f | 759 | { HID_USB_DEVICE(USB_VENDOR_ID_LENOVO, USB_DEVICE_ID_LENOVO_X1_COVER) }, |
c5293409 | 760 | { HID_USB_DEVICE(USB_VENDOR_ID_PRIMAX, USB_DEVICE_ID_PRIMAX_REZEL) }, |
10235380 TA |
761 | { HID_USB_DEVICE(USB_VENDOR_ID_SYNAPTICS, USB_DEVICE_ID_SYNAPTICS_ACER_SWITCH5), |
762 | .driver_data = RMI_DEVICE_OUTPUT_SET_REPORT }, | |
ba391e5a | 763 | { HID_DEVICE(HID_BUS_ANY, HID_GROUP_RMI, HID_ANY_ID, HID_ANY_ID) }, |
9fb6bf02 BT |
764 | { } |
765 | }; | |
766 | MODULE_DEVICE_TABLE(hid, rmi_id); | |
767 | ||
768 | static struct hid_driver rmi_driver = { | |
769 | .name = "hid-rmi", | |
770 | .id_table = rmi_id, | |
771 | .probe = rmi_probe, | |
772 | .remove = rmi_remove, | |
2f43de60 | 773 | .event = rmi_event, |
9fb6bf02 | 774 | .raw_event = rmi_raw_event, |
c94ba060 | 775 | .report = rmi_report, |
9fb6bf02 BT |
776 | .input_mapping = rmi_input_mapping, |
777 | .input_configured = rmi_input_configured, | |
778 | #ifdef CONFIG_PM | |
09256360 | 779 | .suspend = rmi_suspend, |
9fb6bf02 | 780 | .resume = rmi_post_resume, |
0b2c7a89 | 781 | .reset_resume = rmi_post_resume, |
9fb6bf02 BT |
782 | #endif |
783 | }; | |
784 | ||
785 | module_hid_driver(rmi_driver); | |
786 | ||
787 | MODULE_AUTHOR("Andrew Duggan <aduggan@synaptics.com>"); | |
788 | MODULE_DESCRIPTION("RMI HID driver"); | |
789 | MODULE_LICENSE("GPL"); |