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x86/build: convert function graph '-Os' error to warning
[linux/fpc-iii.git] / drivers / hid / hid-alps.c
blobed9c0ea5b026efa698462bc389307bd16427f98c
1 /*
2 * Copyright (c) 2016 Masaki Ota <masaki.ota@jp.alps.com>
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the Free
6 * Software Foundation; either version 2 of the License, or (at your option)
7 * any later version.
8 */
9
10 #include <linux/kernel.h>
11 #include <linux/hid.h>
12 #include <linux/input.h>
13 #include <linux/input/mt.h>
14 #include <linux/module.h>
15 #include <asm/unaligned.h>
16 #include "hid-ids.h"
17
18 /* ALPS Device Product ID */
19 #define HID_PRODUCT_ID_T3_BTNLESS 0xD0C0
20 #define HID_PRODUCT_ID_COSMO 0x1202
21 #define HID_PRODUCT_ID_U1_PTP_1 0x1207
22 #define HID_PRODUCT_ID_U1 0x1209
23 #define HID_PRODUCT_ID_U1_PTP_2 0x120A
24 #define HID_PRODUCT_ID_U1_DUAL 0x120B
25 #define HID_PRODUCT_ID_T4_BTNLESS 0x120C
26
27 #define DEV_SINGLEPOINT 0x01
28 #define DEV_DUALPOINT 0x02
29
30 #define U1_MOUSE_REPORT_ID 0x01 /* Mouse data ReportID */
31 #define U1_ABSOLUTE_REPORT_ID 0x03 /* Absolute data ReportID */
32 #define U1_FEATURE_REPORT_ID 0x05 /* Feature ReportID */
33 #define U1_SP_ABSOLUTE_REPORT_ID 0x06 /* Feature ReportID */
34
35 #define U1_FEATURE_REPORT_LEN 0x08 /* Feature Report Length */
36 #define U1_FEATURE_REPORT_LEN_ALL 0x0A
37 #define U1_CMD_REGISTER_READ 0xD1
38 #define U1_CMD_REGISTER_WRITE 0xD2
39
40 #define U1_DEVTYPE_SP_SUPPORT 0x10 /* SP Support */
41 #define U1_DISABLE_DEV 0x01
42 #define U1_TP_ABS_MODE 0x02
43 #define U1_SP_ABS_MODE 0x80
44
45 #define ADDRESS_U1_DEV_CTRL_1 0x00800040
46 #define ADDRESS_U1_DEVICE_TYP 0x00800043
47 #define ADDRESS_U1_NUM_SENS_X 0x00800047
48 #define ADDRESS_U1_NUM_SENS_Y 0x00800048
49 #define ADDRESS_U1_PITCH_SENS_X 0x00800049
50 #define ADDRESS_U1_PITCH_SENS_Y 0x0080004A
51 #define ADDRESS_U1_RESO_DWN_ABS 0x0080004E
52 #define ADDRESS_U1_PAD_BTN 0x00800052
53 #define ADDRESS_U1_SP_BTN 0x0080009F
54
55 #define MAX_TOUCHES 5
56
57 /**
58 * struct u1_data
59 *
60 * @input: pointer to the kernel input device
61 * @input2: pointer to the kernel input2 device
62 * @hdev: pointer to the struct hid_device
63 *
64 * @dev_ctrl: device control parameter
65 * @dev_type: device type
66 * @sen_line_num_x: number of sensor line of X
67 * @sen_line_num_y: number of sensor line of Y
68 * @pitch_x: sensor pitch of X
69 * @pitch_y: sensor pitch of Y
70 * @resolution: resolution
71 * @btn_info: button information
72 * @x_active_len_mm: active area length of X (mm)
73 * @y_active_len_mm: active area length of Y (mm)
74 * @x_max: maximum x coordinate value
75 * @y_max: maximum y coordinate value
76 * @btn_cnt: number of buttons
77 * @sp_btn_cnt: number of stick buttons
78 */
79 struct u1_dev {
80 struct input_dev *input;
81 struct input_dev *input2;
82 struct hid_device *hdev;
83
84 u8 dev_ctrl;
85 u8 dev_type;
86 u8 sen_line_num_x;
87 u8 sen_line_num_y;
88 u8 pitch_x;
89 u8 pitch_y;
90 u8 resolution;
91 u8 btn_info;
92 u8 sp_btn_info;
93 u32 x_active_len_mm;
94 u32 y_active_len_mm;
95 u32 x_max;
96 u32 y_max;
97 u32 btn_cnt;
98 u32 sp_btn_cnt;
99 };
100
101 static int u1_read_write_register(struct hid_device *hdev, u32 address,
102 u8 *read_val, u8 write_val, bool read_flag)
103 {
104 int ret, i;
105 u8 check_sum;
106 u8 *input;
107 u8 *readbuf;
108
109 input = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL);
110 if (!input)
111 return -ENOMEM;
112
113 input[0] = U1_FEATURE_REPORT_ID;
114 if (read_flag) {
115 input[1] = U1_CMD_REGISTER_READ;
116 input[6] = 0x00;
117 } else {
118 input[1] = U1_CMD_REGISTER_WRITE;
119 input[6] = write_val;
120 }
121
122 put_unaligned_le32(address, input + 2);
123
124 /* Calculate the checksum */
125 check_sum = U1_FEATURE_REPORT_LEN_ALL;
126 for (i = 0; i < U1_FEATURE_REPORT_LEN - 1; i++)
127 check_sum += input[i];
128
129 input[7] = check_sum;
130 ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, input,
131 U1_FEATURE_REPORT_LEN,
132 HID_FEATURE_REPORT, HID_REQ_SET_REPORT);
133
134 if (ret < 0) {
135 dev_err(&hdev->dev, "failed to read command (%d)\n", ret);
136 goto exit;
137 }
138
139 if (read_flag) {
140 readbuf = kzalloc(U1_FEATURE_REPORT_LEN, GFP_KERNEL);
141 if (!readbuf) {
142 ret = -ENOMEM;
143 goto exit;
144 }
145
146 ret = hid_hw_raw_request(hdev, U1_FEATURE_REPORT_ID, readbuf,
147 U1_FEATURE_REPORT_LEN,
148 HID_FEATURE_REPORT, HID_REQ_GET_REPORT);
149
150 if (ret < 0) {
151 dev_err(&hdev->dev, "failed read register (%d)\n", ret);
152 kfree(readbuf);
153 goto exit;
154 }
155
156 *read_val = readbuf[6];
157
158 kfree(readbuf);
159 }
160
161 ret = 0;
162
163 exit:
164 kfree(input);
165 return ret;
166 }
167
168 static int alps_raw_event(struct hid_device *hdev,
169 struct hid_report *report, u8 *data, int size)
170 {
171 unsigned int x, y, z;
172 int i;
173 short sp_x, sp_y;
174 struct u1_dev *hdata = hid_get_drvdata(hdev);
175
176 switch (data[0]) {
177 case U1_MOUSE_REPORT_ID:
178 break;
179 case U1_FEATURE_REPORT_ID:
180 break;
181 case U1_ABSOLUTE_REPORT_ID:
182 for (i = 0; i < MAX_TOUCHES; i++) {
183 u8 *contact = &data[i * 5];
184
185 x = get_unaligned_le16(contact + 3);
186 y = get_unaligned_le16(contact + 5);
187 z = contact[7] & 0x7F;
188
189 input_mt_slot(hdata->input, i);
190
191 if (z != 0) {
192 input_mt_report_slot_state(hdata->input,
193 MT_TOOL_FINGER, 1);
194 input_report_abs(hdata->input,
195 ABS_MT_POSITION_X, x);
196 input_report_abs(hdata->input,
197 ABS_MT_POSITION_Y, y);
198 input_report_abs(hdata->input,
199 ABS_MT_PRESSURE, z);
200 } else {
201 input_mt_report_slot_state(hdata->input,
202 MT_TOOL_FINGER, 0);
203 }
204 }
205
206 input_mt_sync_frame(hdata->input);
207
208 input_report_key(hdata->input, BTN_LEFT,
209 data[1] & 0x1);
210 input_report_key(hdata->input, BTN_RIGHT,
211 (data[1] & 0x2));
212 input_report_key(hdata->input, BTN_MIDDLE,
213 (data[1] & 0x4));
214
215 input_sync(hdata->input);
216
217 return 1;
218
219 case U1_SP_ABSOLUTE_REPORT_ID:
220 sp_x = get_unaligned_le16(data+2);
221 sp_y = get_unaligned_le16(data+4);
222
223 sp_x = sp_x / 8;
224 sp_y = sp_y / 8;
225
226 input_report_rel(hdata->input2, REL_X, sp_x);
227 input_report_rel(hdata->input2, REL_Y, sp_y);
228
229 input_report_key(hdata->input2, BTN_LEFT,
230 data[1] & 0x1);
231 input_report_key(hdata->input2, BTN_RIGHT,
232 (data[1] & 0x2));
233 input_report_key(hdata->input2, BTN_MIDDLE,
234 (data[1] & 0x4));
235
236 input_sync(hdata->input2);
237
238 return 1;
239 }
240
241 return 0;
242 }
243
244 #ifdef CONFIG_PM
245 static int alps_post_reset(struct hid_device *hdev)
246 {
247 return u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
248 NULL, U1_TP_ABS_MODE | U1_SP_ABS_MODE, false);
249 }
250
251 static int alps_post_resume(struct hid_device *hdev)
252 {
253 return u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
254 NULL, U1_TP_ABS_MODE | U1_SP_ABS_MODE, false);
255 }
256 #endif /* CONFIG_PM */
257
258 static int alps_input_configured(struct hid_device *hdev, struct hid_input *hi)
259 {
260 struct u1_dev *data = hid_get_drvdata(hdev);
261 struct input_dev *input = hi->input, *input2;
262 struct u1_dev devInfo;
263 int ret;
264 int res_x, res_y, i;
265
266 data->input = input;
267
268 hid_dbg(hdev, "Opening low level driver\n");
269 ret = hid_hw_open(hdev);
270 if (ret)
271 return ret;
272
273 /* Allow incoming hid reports */
274 hid_device_io_start(hdev);
275
276 /* Device initialization */
277 ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
278 &devInfo.dev_ctrl, 0, true);
279 if (ret < 0) {
280 dev_err(&hdev->dev, "failed U1_DEV_CTRL_1 (%d)\n", ret);
281 goto exit;
282 }
283
284 devInfo.dev_ctrl &= ~U1_DISABLE_DEV;
285 devInfo.dev_ctrl |= U1_TP_ABS_MODE;
286 ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
287 NULL, devInfo.dev_ctrl, false);
288 if (ret < 0) {
289 dev_err(&hdev->dev, "failed to change TP mode (%d)\n", ret);
290 goto exit;
291 }
292
293 ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_X,
294 &devInfo.sen_line_num_x, 0, true);
295 if (ret < 0) {
296 dev_err(&hdev->dev, "failed U1_NUM_SENS_X (%d)\n", ret);
297 goto exit;
298 }
299
300 ret = u1_read_write_register(hdev, ADDRESS_U1_NUM_SENS_Y,
301 &devInfo.sen_line_num_y, 0, true);
302 if (ret < 0) {
303 dev_err(&hdev->dev, "failed U1_NUM_SENS_Y (%d)\n", ret);
304 goto exit;
305 }
306
307 ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_X,
308 &devInfo.pitch_x, 0, true);
309 if (ret < 0) {
310 dev_err(&hdev->dev, "failed U1_PITCH_SENS_X (%d)\n", ret);
311 goto exit;
312 }
313
314 ret = u1_read_write_register(hdev, ADDRESS_U1_PITCH_SENS_Y,
315 &devInfo.pitch_y, 0, true);
316 if (ret < 0) {
317 dev_err(&hdev->dev, "failed U1_PITCH_SENS_Y (%d)\n", ret);
318 goto exit;
319 }
320
321 ret = u1_read_write_register(hdev, ADDRESS_U1_RESO_DWN_ABS,
322 &devInfo.resolution, 0, true);
323 if (ret < 0) {
324 dev_err(&hdev->dev, "failed U1_RESO_DWN_ABS (%d)\n", ret);
325 goto exit;
326 }
327
328 ret = u1_read_write_register(hdev, ADDRESS_U1_PAD_BTN,
329 &devInfo.btn_info, 0, true);
330 if (ret < 0) {
331 dev_err(&hdev->dev, "failed U1_PAD_BTN (%d)\n", ret);
332 goto exit;
333 }
334
335 /* Check StickPointer device */
336 ret = u1_read_write_register(hdev, ADDRESS_U1_DEVICE_TYP,
337 &devInfo.dev_type, 0, true);
338 if (ret < 0) {
339 dev_err(&hdev->dev, "failed U1_DEVICE_TYP (%d)\n", ret);
340 goto exit;
341 }
342
343 devInfo.x_active_len_mm =
344 (devInfo.pitch_x * (devInfo.sen_line_num_x - 1)) / 10;
345 devInfo.y_active_len_mm =
346 (devInfo.pitch_y * (devInfo.sen_line_num_y - 1)) / 10;
347
348 devInfo.x_max =
349 (devInfo.resolution << 2) * (devInfo.sen_line_num_x - 1);
350 devInfo.y_max =
351 (devInfo.resolution << 2) * (devInfo.sen_line_num_y - 1);
352
353 __set_bit(EV_ABS, input->evbit);
354 input_set_abs_params(input, ABS_MT_POSITION_X, 1, devInfo.x_max, 0, 0);
355 input_set_abs_params(input, ABS_MT_POSITION_Y, 1, devInfo.y_max, 0, 0);
356
357 if (devInfo.x_active_len_mm && devInfo.y_active_len_mm) {
358 res_x = (devInfo.x_max - 1) / devInfo.x_active_len_mm;
359 res_y = (devInfo.y_max - 1) / devInfo.y_active_len_mm;
360
361 input_abs_set_res(input, ABS_MT_POSITION_X, res_x);
362 input_abs_set_res(input, ABS_MT_POSITION_Y, res_y);
363 }
364
365 input_set_abs_params(input, ABS_MT_PRESSURE, 0, 64, 0, 0);
366
367 input_mt_init_slots(input, MAX_TOUCHES, INPUT_MT_POINTER);
368
369 __set_bit(EV_KEY, input->evbit);
370 if ((devInfo.btn_info & 0x0F) == (devInfo.btn_info & 0xF0) >> 4) {
371 devInfo.btn_cnt = (devInfo.btn_info & 0x0F);
372 } else {
373 /* Button pad */
374 devInfo.btn_cnt = 1;
375 __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
376 }
377
378 for (i = 0; i < devInfo.btn_cnt; i++)
379 __set_bit(BTN_LEFT + i, input->keybit);
380
381
382 /* Stick device initialization */
383 if (devInfo.dev_type & U1_DEVTYPE_SP_SUPPORT) {
384
385 input2 = input_allocate_device();
386 if (!input2) {
387 ret = -ENOMEM;
388 goto exit;
389 }
390
391 data->input2 = input2;
392
393 devInfo.dev_ctrl |= U1_SP_ABS_MODE;
394 ret = u1_read_write_register(hdev, ADDRESS_U1_DEV_CTRL_1,
395 NULL, devInfo.dev_ctrl, false);
396 if (ret < 0) {
397 dev_err(&hdev->dev, "failed SP mode (%d)\n", ret);
398 input_free_device(input2);
399 goto exit;
400 }
401
402 ret = u1_read_write_register(hdev, ADDRESS_U1_SP_BTN,
403 &devInfo.sp_btn_info, 0, true);
404 if (ret < 0) {
405 dev_err(&hdev->dev, "failed U1_SP_BTN (%d)\n", ret);
406 input_free_device(input2);
407 goto exit;
408 }
409
410 input2->phys = input->phys;
411 input2->name = "DualPoint Stick";
412 input2->id.bustype = BUS_I2C;
413 input2->id.vendor = input->id.vendor;
414 input2->id.product = input->id.product;
415 input2->id.version = input->id.version;
416 input2->dev.parent = input->dev.parent;
417
418 __set_bit(EV_KEY, input2->evbit);
419 devInfo.sp_btn_cnt = (devInfo.sp_btn_info & 0x0F);
420 for (i = 0; i < devInfo.sp_btn_cnt; i++)
421 __set_bit(BTN_LEFT + i, input2->keybit);
422
423 __set_bit(EV_REL, input2->evbit);
424 __set_bit(REL_X, input2->relbit);
425 __set_bit(REL_Y, input2->relbit);
426 __set_bit(INPUT_PROP_POINTER, input2->propbit);
427 __set_bit(INPUT_PROP_POINTING_STICK, input2->propbit);
428
429 ret = input_register_device(data->input2);
430 if (ret) {
431 input_free_device(input2);
432 goto exit;
433 }
434 }
435
436 exit:
437 hid_device_io_stop(hdev);
438 hid_hw_close(hdev);
439 return ret;
440 }
441
442 static int alps_input_mapping(struct hid_device *hdev,
443 struct hid_input *hi, struct hid_field *field,
444 struct hid_usage *usage, unsigned long **bit, int *max)
445 {
446 return -1;
447 }
448
449 static int alps_probe(struct hid_device *hdev, const struct hid_device_id *id)
450 {
451 struct u1_dev *data = NULL;
452 int ret;
453
454 data = devm_kzalloc(&hdev->dev, sizeof(struct u1_dev), GFP_KERNEL);
455 if (!data)
456 return -ENOMEM;
457
458 data->hdev = hdev;
459 hid_set_drvdata(hdev, data);
460
461 hdev->quirks |= HID_QUIRK_NO_INIT_REPORTS;
462
463 ret = hid_parse(hdev);
464 if (ret) {
465 hid_err(hdev, "parse failed\n");
466 return ret;
467 }
468
469 ret = hid_hw_start(hdev, HID_CONNECT_DEFAULT);
470 if (ret) {
471 hid_err(hdev, "hw start failed\n");
472 return ret;
473 }
474
475 return 0;
476 }
477
478 static void alps_remove(struct hid_device *hdev)
479 {
480 hid_hw_stop(hdev);
481 }
482
483 static const struct hid_device_id alps_id[] = {
484 { HID_DEVICE(HID_BUS_ANY, HID_GROUP_ANY,
485 USB_VENDOR_ID_ALPS_JP, HID_DEVICE_ID_ALPS_U1_DUAL) },
486 { }
487 };
488 MODULE_DEVICE_TABLE(hid, alps_id);
489
490 static struct hid_driver alps_driver = {
491 .name = "hid-alps",
492 .id_table = alps_id,
493 .probe = alps_probe,
494 .remove = alps_remove,
495 .raw_event = alps_raw_event,
496 .input_mapping = alps_input_mapping,
497 .input_configured = alps_input_configured,
498 #ifdef CONFIG_PM
499 .resume = alps_post_resume,
500 .reset_resume = alps_post_reset,
501 #endif
502 };
503
504 module_hid_driver(alps_driver);
505
506 MODULE_AUTHOR("Masaki Ota <masaki.ota@jp.alps.com>");
507 MODULE_DESCRIPTION("ALPS HID driver");
508 MODULE_LICENSE("GPL");
Linux with added FPC-III support