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1 | /* |
2 | * Copyright (c) 2012-2016 Synaptics Incorporated | |
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 version 2 as published by | |
6 | * the Free Software Foundation. | |
7 | */ | |
8 | #include <linux/input.h> | |
9 | #include <linux/input/mt.h> | |
10 | #include <linux/rmi.h> | |
11 | #include "rmi_driver.h" | |
12 | #include "rmi_2d_sensor.h" | |
13 | ||
14 | enum rmi_f12_object_type { | |
15 | RMI_F12_OBJECT_NONE = 0x00, | |
16 | RMI_F12_OBJECT_FINGER = 0x01, | |
17 | RMI_F12_OBJECT_STYLUS = 0x02, | |
18 | RMI_F12_OBJECT_PALM = 0x03, | |
19 | RMI_F12_OBJECT_UNCLASSIFIED = 0x04, | |
20 | RMI_F12_OBJECT_GLOVED_FINGER = 0x06, | |
21 | RMI_F12_OBJECT_NARROW_OBJECT = 0x07, | |
22 | RMI_F12_OBJECT_HAND_EDGE = 0x08, | |
23 | RMI_F12_OBJECT_COVER = 0x0A, | |
24 | RMI_F12_OBJECT_STYLUS_2 = 0x0B, | |
25 | RMI_F12_OBJECT_ERASER = 0x0C, | |
26 | RMI_F12_OBJECT_SMALL_OBJECT = 0x0D, | |
27 | }; | |
28 | ||
29 | struct f12_data { | |
30 | struct rmi_function *fn; | |
31 | struct rmi_2d_sensor sensor; | |
32 | struct rmi_2d_sensor_platform_data sensor_pdata; | |
33 | ||
34 | u16 data_addr; | |
35 | ||
36 | struct rmi_register_descriptor query_reg_desc; | |
37 | struct rmi_register_descriptor control_reg_desc; | |
38 | struct rmi_register_descriptor data_reg_desc; | |
39 | ||
40 | /* F12 Data1 describes sensed objects */ | |
41 | const struct rmi_register_desc_item *data1; | |
42 | u16 data1_offset; | |
43 | ||
44 | /* F12 Data5 describes finger ACM */ | |
45 | const struct rmi_register_desc_item *data5; | |
46 | u16 data5_offset; | |
47 | ||
48 | /* F12 Data5 describes Pen */ | |
49 | const struct rmi_register_desc_item *data6; | |
50 | u16 data6_offset; | |
51 | ||
52 | ||
53 | /* F12 Data9 reports relative data */ | |
54 | const struct rmi_register_desc_item *data9; | |
55 | u16 data9_offset; | |
56 | ||
57 | const struct rmi_register_desc_item *data15; | |
58 | u16 data15_offset; | |
59 | }; | |
60 | ||
61 | static int rmi_f12_read_sensor_tuning(struct f12_data *f12) | |
62 | { | |
63 | const struct rmi_register_desc_item *item; | |
64 | struct rmi_2d_sensor *sensor = &f12->sensor; | |
65 | struct rmi_function *fn = sensor->fn; | |
66 | struct rmi_device *rmi_dev = fn->rmi_dev; | |
67 | int ret; | |
68 | int offset; | |
69 | u8 buf[14]; | |
70 | int pitch_x = 0; | |
71 | int pitch_y = 0; | |
72 | int clip_x_low = 0; | |
73 | int clip_x_high = 0; | |
74 | int clip_y_low = 0; | |
75 | int clip_y_high = 0; | |
76 | int rx_receivers = 0; | |
77 | int tx_receivers = 0; | |
78 | int sensor_flags = 0; | |
79 | ||
80 | item = rmi_get_register_desc_item(&f12->control_reg_desc, 8); | |
81 | if (!item) { | |
82 | dev_err(&fn->dev, | |
83 | "F12 does not have the sensor tuning control register\n"); | |
84 | return -ENODEV; | |
85 | } | |
86 | ||
87 | offset = rmi_register_desc_calc_reg_offset(&f12->control_reg_desc, 8); | |
88 | ||
89 | if (item->reg_size > 14) { | |
90 | dev_err(&fn->dev, "F12 control8 should be 14 bytes, not: %ld\n", | |
91 | item->reg_size); | |
92 | return -ENODEV; | |
93 | } | |
94 | ||
95 | ret = rmi_read_block(rmi_dev, fn->fd.control_base_addr + offset, buf, | |
96 | item->reg_size); | |
97 | if (ret) | |
98 | return ret; | |
99 | ||
100 | offset = 0; | |
101 | if (rmi_register_desc_has_subpacket(item, 0)) { | |
102 | sensor->max_x = (buf[offset + 1] << 8) | buf[offset]; | |
103 | sensor->max_y = (buf[offset + 3] << 8) | buf[offset + 2]; | |
104 | offset += 4; | |
105 | } | |
106 | ||
107 | rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: max_x: %d max_y: %d\n", __func__, | |
108 | sensor->max_x, sensor->max_y); | |
109 | ||
110 | if (rmi_register_desc_has_subpacket(item, 1)) { | |
111 | pitch_x = (buf[offset + 1] << 8) | buf[offset]; | |
112 | pitch_y = (buf[offset + 3] << 8) | buf[offset + 2]; | |
113 | offset += 4; | |
114 | } | |
115 | ||
116 | if (rmi_register_desc_has_subpacket(item, 2)) { | |
117 | sensor->axis_align.clip_x_low = buf[offset]; | |
118 | sensor->axis_align.clip_x_high = sensor->max_x | |
119 | - buf[offset + 1]; | |
120 | sensor->axis_align.clip_y_low = buf[offset + 2]; | |
121 | sensor->axis_align.clip_y_high = sensor->max_y | |
122 | - buf[offset + 3]; | |
123 | offset += 4; | |
124 | } | |
125 | ||
126 | rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: x low: %d x high: %d y low: %d y high: %d\n", | |
127 | __func__, clip_x_low, clip_x_high, clip_y_low, clip_y_high); | |
128 | ||
129 | if (rmi_register_desc_has_subpacket(item, 3)) { | |
130 | rx_receivers = buf[offset]; | |
131 | tx_receivers = buf[offset + 1]; | |
132 | offset += 2; | |
133 | } | |
134 | ||
135 | if (rmi_register_desc_has_subpacket(item, 4)) { | |
136 | sensor_flags = buf[offset]; | |
137 | offset += 1; | |
138 | } | |
139 | ||
140 | sensor->x_mm = (pitch_x * rx_receivers) >> 12; | |
141 | sensor->y_mm = (pitch_y * tx_receivers) >> 12; | |
142 | ||
143 | rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: x_mm: %d y_mm: %d\n", __func__, | |
144 | sensor->x_mm, sensor->y_mm); | |
145 | ||
146 | return 0; | |
147 | } | |
148 | ||
149 | static void rmi_f12_process_objects(struct f12_data *f12, u8 *data1) | |
150 | { | |
151 | int i; | |
152 | struct rmi_2d_sensor *sensor = &f12->sensor; | |
153 | ||
154 | for (i = 0; i < f12->data1->num_subpackets; i++) { | |
155 | struct rmi_2d_sensor_abs_object *obj = &sensor->objs[i]; | |
156 | ||
157 | obj->type = RMI_2D_OBJECT_NONE; | |
158 | obj->mt_tool = MT_TOOL_FINGER; | |
159 | ||
160 | switch (data1[0]) { | |
161 | case RMI_F12_OBJECT_FINGER: | |
162 | obj->type = RMI_2D_OBJECT_FINGER; | |
163 | break; | |
164 | case RMI_F12_OBJECT_STYLUS: | |
165 | obj->type = RMI_2D_OBJECT_STYLUS; | |
166 | obj->mt_tool = MT_TOOL_PEN; | |
167 | break; | |
168 | case RMI_F12_OBJECT_PALM: | |
169 | obj->type = RMI_2D_OBJECT_PALM; | |
170 | obj->mt_tool = MT_TOOL_PALM; | |
171 | break; | |
172 | case RMI_F12_OBJECT_UNCLASSIFIED: | |
173 | obj->type = RMI_2D_OBJECT_UNCLASSIFIED; | |
174 | break; | |
175 | } | |
176 | ||
177 | obj->x = (data1[2] << 8) | data1[1]; | |
178 | obj->y = (data1[4] << 8) | data1[3]; | |
179 | obj->z = data1[5]; | |
180 | obj->wx = data1[6]; | |
181 | obj->wy = data1[7]; | |
182 | ||
183 | rmi_2d_sensor_abs_process(sensor, obj, i); | |
184 | ||
185 | data1 += 8; | |
186 | } | |
187 | ||
188 | if (sensor->kernel_tracking) | |
189 | input_mt_assign_slots(sensor->input, | |
190 | sensor->tracking_slots, | |
191 | sensor->tracking_pos, | |
192 | sensor->nbr_fingers, | |
193 | sensor->dmax); | |
194 | ||
195 | for (i = 0; i < sensor->nbr_fingers; i++) | |
196 | rmi_2d_sensor_abs_report(sensor, &sensor->objs[i], i); | |
197 | } | |
198 | ||
199 | static int rmi_f12_attention(struct rmi_function *fn, | |
200 | unsigned long *irq_nr_regs) | |
201 | { | |
202 | int retval; | |
203 | struct rmi_device *rmi_dev = fn->rmi_dev; | |
204 | struct f12_data *f12 = dev_get_drvdata(&fn->dev); | |
205 | struct rmi_2d_sensor *sensor = &f12->sensor; | |
206 | ||
207 | if (rmi_dev->xport->attn_data) { | |
208 | memcpy(sensor->data_pkt, rmi_dev->xport->attn_data, | |
209 | sensor->attn_size); | |
210 | rmi_dev->xport->attn_data += sensor->attn_size; | |
211 | rmi_dev->xport->attn_size -= sensor->attn_size; | |
212 | } else { | |
213 | retval = rmi_read_block(rmi_dev, f12->data_addr, | |
214 | sensor->data_pkt, sensor->pkt_size); | |
215 | if (retval < 0) { | |
216 | dev_err(&fn->dev, "Failed to read object data. Code: %d.\n", | |
217 | retval); | |
218 | return retval; | |
219 | } | |
220 | } | |
221 | ||
222 | if (f12->data1) | |
223 | rmi_f12_process_objects(f12, | |
224 | &sensor->data_pkt[f12->data1_offset]); | |
225 | ||
226 | input_mt_sync_frame(sensor->input); | |
227 | ||
228 | return 0; | |
229 | } | |
230 | ||
231 | static int rmi_f12_config(struct rmi_function *fn) | |
232 | { | |
233 | struct rmi_driver *drv = fn->rmi_dev->driver; | |
234 | ||
235 | drv->set_irq_bits(fn->rmi_dev, fn->irq_mask); | |
236 | ||
237 | return 0; | |
238 | } | |
239 | ||
240 | static int rmi_f12_probe(struct rmi_function *fn) | |
241 | { | |
242 | struct f12_data *f12; | |
243 | int ret; | |
244 | struct rmi_device *rmi_dev = fn->rmi_dev; | |
245 | char buf; | |
246 | u16 query_addr = fn->fd.query_base_addr; | |
247 | const struct rmi_register_desc_item *item; | |
248 | struct rmi_2d_sensor *sensor; | |
249 | struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev); | |
250 | struct rmi_transport_dev *xport = rmi_dev->xport; | |
251 | u16 data_offset = 0; | |
252 | ||
253 | rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s\n", __func__); | |
254 | ||
255 | ret = rmi_read(fn->rmi_dev, query_addr, &buf); | |
256 | if (ret < 0) { | |
257 | dev_err(&fn->dev, "Failed to read general info register: %d\n", | |
258 | ret); | |
259 | return -ENODEV; | |
260 | } | |
261 | ++query_addr; | |
262 | ||
263 | if (!(buf & 0x1)) { | |
264 | dev_err(&fn->dev, | |
265 | "Behavior of F12 without register descriptors is undefined.\n"); | |
266 | return -ENODEV; | |
267 | } | |
268 | ||
269 | f12 = devm_kzalloc(&fn->dev, sizeof(struct f12_data), GFP_KERNEL); | |
270 | if (!f12) | |
271 | return -ENOMEM; | |
272 | ||
273 | if (fn->dev.of_node) { | |
274 | ret = rmi_2d_sensor_of_probe(&fn->dev, &f12->sensor_pdata); | |
275 | if (ret) | |
276 | return ret; | |
277 | } else if (pdata->sensor_pdata) { | |
278 | f12->sensor_pdata = *pdata->sensor_pdata; | |
279 | } | |
280 | ||
281 | ret = rmi_read_register_desc(rmi_dev, query_addr, | |
282 | &f12->query_reg_desc); | |
283 | if (ret) { | |
284 | dev_err(&fn->dev, | |
285 | "Failed to read the Query Register Descriptor: %d\n", | |
286 | ret); | |
287 | return ret; | |
288 | } | |
289 | query_addr += 3; | |
290 | ||
291 | ret = rmi_read_register_desc(rmi_dev, query_addr, | |
292 | &f12->control_reg_desc); | |
293 | if (ret) { | |
294 | dev_err(&fn->dev, | |
295 | "Failed to read the Control Register Descriptor: %d\n", | |
296 | ret); | |
297 | return ret; | |
298 | } | |
299 | query_addr += 3; | |
300 | ||
301 | ret = rmi_read_register_desc(rmi_dev, query_addr, | |
302 | &f12->data_reg_desc); | |
303 | if (ret) { | |
304 | dev_err(&fn->dev, | |
305 | "Failed to read the Data Register Descriptor: %d\n", | |
306 | ret); | |
307 | return ret; | |
308 | } | |
309 | query_addr += 3; | |
310 | ||
311 | sensor = &f12->sensor; | |
312 | sensor->fn = fn; | |
313 | f12->data_addr = fn->fd.data_base_addr; | |
314 | sensor->pkt_size = rmi_register_desc_calc_size(&f12->data_reg_desc); | |
315 | ||
316 | sensor->axis_align = | |
317 | f12->sensor_pdata.axis_align; | |
318 | ||
319 | sensor->x_mm = f12->sensor_pdata.x_mm; | |
320 | sensor->y_mm = f12->sensor_pdata.y_mm; | |
321 | ||
322 | if (sensor->sensor_type == rmi_sensor_default) | |
323 | sensor->sensor_type = | |
324 | f12->sensor_pdata.sensor_type; | |
325 | ||
326 | rmi_dbg(RMI_DEBUG_FN, &fn->dev, "%s: data packet size: %d\n", __func__, | |
327 | sensor->pkt_size); | |
328 | sensor->data_pkt = devm_kzalloc(&fn->dev, sensor->pkt_size, GFP_KERNEL); | |
329 | if (!sensor->data_pkt) | |
330 | return -ENOMEM; | |
331 | ||
332 | dev_set_drvdata(&fn->dev, f12); | |
333 | ||
334 | ret = rmi_f12_read_sensor_tuning(f12); | |
335 | if (ret) | |
336 | return ret; | |
337 | ||
338 | /* | |
339 | * Figure out what data is contained in the data registers. HID devices | |
340 | * may have registers defined, but their data is not reported in the | |
341 | * HID attention report. Registers which are not reported in the HID | |
342 | * attention report check to see if the device is receiving data from | |
343 | * HID attention reports. | |
344 | */ | |
345 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 0); | |
346 | if (item && !xport->attn_data) | |
347 | data_offset += item->reg_size; | |
348 | ||
349 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 1); | |
350 | if (item) { | |
351 | f12->data1 = item; | |
352 | f12->data1_offset = data_offset; | |
353 | data_offset += item->reg_size; | |
354 | sensor->nbr_fingers = item->num_subpackets; | |
355 | sensor->report_abs = 1; | |
356 | sensor->attn_size += item->reg_size; | |
357 | } | |
358 | ||
359 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 2); | |
360 | if (item && !xport->attn_data) | |
361 | data_offset += item->reg_size; | |
362 | ||
363 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 3); | |
364 | if (item && !xport->attn_data) | |
365 | data_offset += item->reg_size; | |
366 | ||
367 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 4); | |
368 | if (item && !xport->attn_data) | |
369 | data_offset += item->reg_size; | |
370 | ||
371 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 5); | |
372 | if (item) { | |
373 | f12->data5 = item; | |
374 | f12->data5_offset = data_offset; | |
375 | data_offset += item->reg_size; | |
376 | sensor->attn_size += item->reg_size; | |
377 | } | |
378 | ||
379 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 6); | |
380 | if (item && !xport->attn_data) { | |
381 | f12->data6 = item; | |
382 | f12->data6_offset = data_offset; | |
383 | data_offset += item->reg_size; | |
384 | } | |
385 | ||
386 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 7); | |
387 | if (item && !xport->attn_data) | |
388 | data_offset += item->reg_size; | |
389 | ||
390 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 8); | |
391 | if (item && !xport->attn_data) | |
392 | data_offset += item->reg_size; | |
393 | ||
394 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 9); | |
395 | if (item && !xport->attn_data) { | |
396 | f12->data9 = item; | |
397 | f12->data9_offset = data_offset; | |
398 | data_offset += item->reg_size; | |
399 | if (!sensor->report_abs) | |
400 | sensor->report_rel = 1; | |
401 | } | |
402 | ||
403 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 10); | |
404 | if (item && !xport->attn_data) | |
405 | data_offset += item->reg_size; | |
406 | ||
407 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 11); | |
408 | if (item && !xport->attn_data) | |
409 | data_offset += item->reg_size; | |
410 | ||
411 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 12); | |
412 | if (item && !xport->attn_data) | |
413 | data_offset += item->reg_size; | |
414 | ||
415 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 13); | |
416 | if (item && !xport->attn_data) | |
417 | data_offset += item->reg_size; | |
418 | ||
419 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 14); | |
420 | if (item && !xport->attn_data) | |
421 | data_offset += item->reg_size; | |
422 | ||
423 | item = rmi_get_register_desc_item(&f12->data_reg_desc, 15); | |
424 | if (item && !xport->attn_data) { | |
425 | f12->data15 = item; | |
426 | f12->data15_offset = data_offset; | |
427 | data_offset += item->reg_size; | |
428 | } | |
429 | ||
430 | /* allocate the in-kernel tracking buffers */ | |
431 | sensor->tracking_pos = devm_kzalloc(&fn->dev, | |
432 | sizeof(struct input_mt_pos) * sensor->nbr_fingers, | |
433 | GFP_KERNEL); | |
434 | sensor->tracking_slots = devm_kzalloc(&fn->dev, | |
435 | sizeof(int) * sensor->nbr_fingers, GFP_KERNEL); | |
436 | sensor->objs = devm_kzalloc(&fn->dev, | |
437 | sizeof(struct rmi_2d_sensor_abs_object) | |
438 | * sensor->nbr_fingers, GFP_KERNEL); | |
439 | if (!sensor->tracking_pos || !sensor->tracking_slots || !sensor->objs) | |
440 | return -ENOMEM; | |
441 | ||
442 | ret = rmi_2d_sensor_configure_input(fn, sensor); | |
443 | if (ret) | |
444 | return ret; | |
445 | ||
446 | return 0; | |
447 | } | |
448 | ||
449 | struct rmi_function_handler rmi_f12_handler = { | |
450 | .driver = { | |
451 | .name = "rmi4_f12", | |
452 | }, | |
453 | .func = 0x12, | |
454 | .probe = rmi_f12_probe, | |
455 | .config = rmi_f12_config, | |
456 | .attention = rmi_f12_attention, | |
457 | }; |