1 | // SPDX-License-Identifier: GPL-2.0-only |
2 | /* |
3 | * Cypress Trackpad PS/2 mouse driver |
4 | * |
5 | * Copyright (c) 2012 Cypress Semiconductor Corporation. |
6 | * |
7 | * Author: |
8 | * Dudley Du <dudl@cypress.com> |
9 | * |
10 | * Additional contributors include: |
11 | * Kamal Mostafa <kamal@canonical.com> |
12 | * Kyle Fazzari <git@status.e4ward.com> |
13 | */ |
14 | |
15 | #include <linux/module.h> |
16 | #include <linux/kernel.h> |
17 | #include <linux/slab.h> |
18 | #include <linux/serio.h> |
19 | #include <linux/libps2.h> |
20 | #include <linux/input.h> |
21 | #include <linux/input/mt.h> |
22 | #include <linux/sched.h> |
23 | #include <linux/wait.h> |
24 | |
25 | #include "cypress_ps2.h" |
26 | |
27 | #undef CYTP_DEBUG_VERBOSE /* define this and DEBUG for more verbose dump */ |
28 | |
29 | static void cypress_set_packet_size(struct psmouse *psmouse, unsigned int n) |
30 | { |
31 | struct cytp_data *cytp = psmouse->private; |
32 | cytp->pkt_size = n; |
33 | } |
34 | |
35 | static const unsigned char cytp_rate[] = {10, 20, 40, 60, 100, 200}; |
36 | static const unsigned char cytp_resolution[] = {0x00, 0x01, 0x02, 0x03}; |
37 | |
38 | static int cypress_ps2_sendbyte(struct psmouse *psmouse, int value) |
39 | { |
40 | struct ps2dev *ps2dev = &psmouse->ps2dev; |
41 | |
42 | if (ps2_sendbyte(ps2dev, byte: value & 0xff, CYTP_CMD_TIMEOUT) < 0) { |
43 | psmouse_dbg(psmouse, |
44 | "sending command 0x%02x failed, resp 0x%02x\n" , |
45 | value & 0xff, ps2dev->nak); |
46 | if (ps2dev->nak == CYTP_PS2_RETRY) |
47 | return CYTP_PS2_RETRY; |
48 | else |
49 | return CYTP_PS2_ERROR; |
50 | } |
51 | |
52 | #ifdef CYTP_DEBUG_VERBOSE |
53 | psmouse_dbg(psmouse, "sending command 0x%02x succeeded, resp 0xfa\n" , |
54 | value & 0xff); |
55 | #endif |
56 | |
57 | return 0; |
58 | } |
59 | |
60 | static int cypress_ps2_ext_cmd(struct psmouse *psmouse, unsigned short cmd, |
61 | unsigned char data) |
62 | { |
63 | struct ps2dev *ps2dev = &psmouse->ps2dev; |
64 | int tries = CYTP_PS2_CMD_TRIES; |
65 | int rc; |
66 | |
67 | ps2_begin_command(ps2dev); |
68 | |
69 | do { |
70 | /* |
71 | * Send extension command byte (0xE8 or 0xF3). |
72 | * If sending the command fails, send recovery command |
73 | * to make the device return to the ready state. |
74 | */ |
75 | rc = cypress_ps2_sendbyte(psmouse, value: cmd & 0xff); |
76 | if (rc == CYTP_PS2_RETRY) { |
77 | rc = cypress_ps2_sendbyte(psmouse, value: 0x00); |
78 | if (rc == CYTP_PS2_RETRY) |
79 | rc = cypress_ps2_sendbyte(psmouse, value: 0x0a); |
80 | } |
81 | if (rc == CYTP_PS2_ERROR) |
82 | continue; |
83 | |
84 | rc = cypress_ps2_sendbyte(psmouse, value: data); |
85 | if (rc == CYTP_PS2_RETRY) |
86 | rc = cypress_ps2_sendbyte(psmouse, value: data); |
87 | if (rc == CYTP_PS2_ERROR) |
88 | continue; |
89 | else |
90 | break; |
91 | } while (--tries > 0); |
92 | |
93 | ps2_end_command(ps2dev); |
94 | |
95 | return rc; |
96 | } |
97 | |
98 | static int cypress_ps2_read_cmd_status(struct psmouse *psmouse, |
99 | unsigned char cmd, |
100 | unsigned char *param) |
101 | { |
102 | int rc; |
103 | struct ps2dev *ps2dev = &psmouse->ps2dev; |
104 | enum psmouse_state old_state; |
105 | int pktsize; |
106 | |
107 | ps2_begin_command(ps2dev); |
108 | |
109 | old_state = psmouse->state; |
110 | psmouse->state = PSMOUSE_CMD_MODE; |
111 | psmouse->pktcnt = 0; |
112 | |
113 | pktsize = (cmd == CYTP_CMD_READ_TP_METRICS) ? 8 : 3; |
114 | memset(param, 0, pktsize); |
115 | |
116 | rc = cypress_ps2_sendbyte(psmouse, value: 0xe9); |
117 | if (rc < 0) |
118 | goto out; |
119 | |
120 | wait_event_timeout(ps2dev->wait, |
121 | (psmouse->pktcnt >= pktsize), |
122 | msecs_to_jiffies(CYTP_CMD_TIMEOUT)); |
123 | |
124 | memcpy(param, psmouse->packet, pktsize); |
125 | |
126 | psmouse_dbg(psmouse, "Command 0x%02x response data (0x): %*ph\n" , |
127 | cmd, pktsize, param); |
128 | |
129 | out: |
130 | psmouse->state = old_state; |
131 | psmouse->pktcnt = 0; |
132 | |
133 | ps2_end_command(ps2dev); |
134 | |
135 | return rc; |
136 | } |
137 | |
138 | static bool cypress_verify_cmd_state(struct psmouse *psmouse, |
139 | unsigned char cmd, unsigned char *param) |
140 | { |
141 | bool rate_match = false; |
142 | bool resolution_match = false; |
143 | int i; |
144 | |
145 | /* callers will do further checking. */ |
146 | if (cmd == CYTP_CMD_READ_CYPRESS_ID || |
147 | cmd == CYTP_CMD_STANDARD_MODE || |
148 | cmd == CYTP_CMD_READ_TP_METRICS) |
149 | return true; |
150 | |
151 | if ((~param[0] & DFLT_RESP_BITS_VALID) == DFLT_RESP_BITS_VALID && |
152 | (param[0] & DFLT_RESP_BIT_MODE) == DFLT_RESP_STREAM_MODE) { |
153 | for (i = 0; i < sizeof(cytp_resolution); i++) |
154 | if (cytp_resolution[i] == param[1]) |
155 | resolution_match = true; |
156 | |
157 | for (i = 0; i < sizeof(cytp_rate); i++) |
158 | if (cytp_rate[i] == param[2]) |
159 | rate_match = true; |
160 | |
161 | if (resolution_match && rate_match) |
162 | return true; |
163 | } |
164 | |
165 | psmouse_dbg(psmouse, "verify cmd state failed.\n" ); |
166 | return false; |
167 | } |
168 | |
169 | static int cypress_send_ext_cmd(struct psmouse *psmouse, unsigned char cmd, |
170 | unsigned char *param) |
171 | { |
172 | int tries = CYTP_PS2_CMD_TRIES; |
173 | int rc; |
174 | |
175 | psmouse_dbg(psmouse, "send extension cmd 0x%02x, [%d %d %d %d]\n" , |
176 | cmd, DECODE_CMD_AA(cmd), DECODE_CMD_BB(cmd), |
177 | DECODE_CMD_CC(cmd), DECODE_CMD_DD(cmd)); |
178 | |
179 | do { |
180 | cypress_ps2_ext_cmd(psmouse, |
181 | PSMOUSE_CMD_SETRES, DECODE_CMD_DD(cmd)); |
182 | cypress_ps2_ext_cmd(psmouse, |
183 | PSMOUSE_CMD_SETRES, DECODE_CMD_CC(cmd)); |
184 | cypress_ps2_ext_cmd(psmouse, |
185 | PSMOUSE_CMD_SETRES, DECODE_CMD_BB(cmd)); |
186 | cypress_ps2_ext_cmd(psmouse, |
187 | PSMOUSE_CMD_SETRES, DECODE_CMD_AA(cmd)); |
188 | |
189 | rc = cypress_ps2_read_cmd_status(psmouse, cmd, param); |
190 | if (rc) |
191 | continue; |
192 | |
193 | if (cypress_verify_cmd_state(psmouse, cmd, param)) |
194 | return 0; |
195 | |
196 | } while (--tries > 0); |
197 | |
198 | return -EIO; |
199 | } |
200 | |
201 | int cypress_detect(struct psmouse *psmouse, bool set_properties) |
202 | { |
203 | unsigned char param[3]; |
204 | |
205 | if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_CYPRESS_ID, param)) |
206 | return -ENODEV; |
207 | |
208 | /* Check for Cypress Trackpad signature bytes: 0x33 0xCC */ |
209 | if (param[0] != 0x33 || param[1] != 0xCC) |
210 | return -ENODEV; |
211 | |
212 | if (set_properties) { |
213 | psmouse->vendor = "Cypress" ; |
214 | psmouse->name = "Trackpad" ; |
215 | } |
216 | |
217 | return 0; |
218 | } |
219 | |
220 | static int cypress_read_fw_version(struct psmouse *psmouse) |
221 | { |
222 | struct cytp_data *cytp = psmouse->private; |
223 | unsigned char param[3]; |
224 | |
225 | if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_CYPRESS_ID, param)) |
226 | return -ENODEV; |
227 | |
228 | /* Check for Cypress Trackpad signature bytes: 0x33 0xCC */ |
229 | if (param[0] != 0x33 || param[1] != 0xCC) |
230 | return -ENODEV; |
231 | |
232 | cytp->fw_version = param[2] & FW_VERSION_MASX; |
233 | cytp->tp_metrics_supported = (param[2] & TP_METRICS_MASK) ? 1 : 0; |
234 | |
235 | /* |
236 | * Trackpad fw_version 11 (in Dell XPS12) yields a bogus response to |
237 | * CYTP_CMD_READ_TP_METRICS so do not try to use it. LP: #1103594. |
238 | */ |
239 | if (cytp->fw_version >= 11) |
240 | cytp->tp_metrics_supported = 0; |
241 | |
242 | psmouse_dbg(psmouse, "cytp->fw_version = %d\n" , cytp->fw_version); |
243 | psmouse_dbg(psmouse, "cytp->tp_metrics_supported = %d\n" , |
244 | cytp->tp_metrics_supported); |
245 | |
246 | return 0; |
247 | } |
248 | |
249 | static int cypress_read_tp_metrics(struct psmouse *psmouse) |
250 | { |
251 | struct cytp_data *cytp = psmouse->private; |
252 | unsigned char param[8]; |
253 | |
254 | /* set default values for tp metrics. */ |
255 | cytp->tp_width = CYTP_DEFAULT_WIDTH; |
256 | cytp->tp_high = CYTP_DEFAULT_HIGH; |
257 | cytp->tp_max_abs_x = CYTP_ABS_MAX_X; |
258 | cytp->tp_max_abs_y = CYTP_ABS_MAX_Y; |
259 | cytp->tp_min_pressure = CYTP_MIN_PRESSURE; |
260 | cytp->tp_max_pressure = CYTP_MAX_PRESSURE; |
261 | cytp->tp_res_x = cytp->tp_max_abs_x / cytp->tp_width; |
262 | cytp->tp_res_y = cytp->tp_max_abs_y / cytp->tp_high; |
263 | |
264 | if (!cytp->tp_metrics_supported) |
265 | return 0; |
266 | |
267 | memset(param, 0, sizeof(param)); |
268 | if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_TP_METRICS, param) == 0) { |
269 | /* Update trackpad parameters. */ |
270 | cytp->tp_max_abs_x = (param[1] << 8) | param[0]; |
271 | cytp->tp_max_abs_y = (param[3] << 8) | param[2]; |
272 | cytp->tp_min_pressure = param[4]; |
273 | cytp->tp_max_pressure = param[5]; |
274 | } |
275 | |
276 | if (!cytp->tp_max_pressure || |
277 | cytp->tp_max_pressure < cytp->tp_min_pressure || |
278 | !cytp->tp_width || !cytp->tp_high || |
279 | !cytp->tp_max_abs_x || |
280 | cytp->tp_max_abs_x < cytp->tp_width || |
281 | !cytp->tp_max_abs_y || |
282 | cytp->tp_max_abs_y < cytp->tp_high) |
283 | return -EINVAL; |
284 | |
285 | cytp->tp_res_x = cytp->tp_max_abs_x / cytp->tp_width; |
286 | cytp->tp_res_y = cytp->tp_max_abs_y / cytp->tp_high; |
287 | |
288 | #ifdef CYTP_DEBUG_VERBOSE |
289 | psmouse_dbg(psmouse, "Dump trackpad hardware configuration as below:\n" ); |
290 | psmouse_dbg(psmouse, "cytp->tp_width = %d\n" , cytp->tp_width); |
291 | psmouse_dbg(psmouse, "cytp->tp_high = %d\n" , cytp->tp_high); |
292 | psmouse_dbg(psmouse, "cytp->tp_max_abs_x = %d\n" , cytp->tp_max_abs_x); |
293 | psmouse_dbg(psmouse, "cytp->tp_max_abs_y = %d\n" , cytp->tp_max_abs_y); |
294 | psmouse_dbg(psmouse, "cytp->tp_min_pressure = %d\n" , cytp->tp_min_pressure); |
295 | psmouse_dbg(psmouse, "cytp->tp_max_pressure = %d\n" , cytp->tp_max_pressure); |
296 | psmouse_dbg(psmouse, "cytp->tp_res_x = %d\n" , cytp->tp_res_x); |
297 | psmouse_dbg(psmouse, "cytp->tp_res_y = %d\n" , cytp->tp_res_y); |
298 | |
299 | psmouse_dbg(psmouse, "tp_type_APA = %d\n" , |
300 | (param[6] & TP_METRICS_BIT_APA) ? 1 : 0); |
301 | psmouse_dbg(psmouse, "tp_type_MTG = %d\n" , |
302 | (param[6] & TP_METRICS_BIT_MTG) ? 1 : 0); |
303 | psmouse_dbg(psmouse, "tp_palm = %d\n" , |
304 | (param[6] & TP_METRICS_BIT_PALM) ? 1 : 0); |
305 | psmouse_dbg(psmouse, "tp_stubborn = %d\n" , |
306 | (param[6] & TP_METRICS_BIT_STUBBORN) ? 1 : 0); |
307 | psmouse_dbg(psmouse, "tp_1f_jitter = %d\n" , |
308 | (param[6] & TP_METRICS_BIT_1F_JITTER) >> 2); |
309 | psmouse_dbg(psmouse, "tp_2f_jitter = %d\n" , |
310 | (param[6] & TP_METRICS_BIT_2F_JITTER) >> 4); |
311 | psmouse_dbg(psmouse, "tp_1f_spike = %d\n" , |
312 | param[7] & TP_METRICS_BIT_1F_SPIKE); |
313 | psmouse_dbg(psmouse, "tp_2f_spike = %d\n" , |
314 | (param[7] & TP_METRICS_BIT_2F_SPIKE) >> 2); |
315 | psmouse_dbg(psmouse, "tp_abs_packet_format_set = %d\n" , |
316 | (param[7] & TP_METRICS_BIT_ABS_PKT_FORMAT_SET) >> 4); |
317 | #endif |
318 | |
319 | return 0; |
320 | } |
321 | |
322 | static int cypress_query_hardware(struct psmouse *psmouse) |
323 | { |
324 | int ret; |
325 | |
326 | ret = cypress_read_fw_version(psmouse); |
327 | if (ret) |
328 | return ret; |
329 | |
330 | ret = cypress_read_tp_metrics(psmouse); |
331 | if (ret) |
332 | return ret; |
333 | |
334 | return 0; |
335 | } |
336 | |
337 | static int cypress_set_absolute_mode(struct psmouse *psmouse) |
338 | { |
339 | struct cytp_data *cytp = psmouse->private; |
340 | unsigned char param[3]; |
341 | |
342 | if (cypress_send_ext_cmd(psmouse, CYTP_CMD_ABS_WITH_PRESSURE_MODE, param) < 0) |
343 | return -1; |
344 | |
345 | cytp->mode = (cytp->mode & ~CYTP_BIT_ABS_REL_MASK) |
346 | | CYTP_BIT_ABS_PRESSURE; |
347 | cypress_set_packet_size(psmouse, n: 5); |
348 | |
349 | return 0; |
350 | } |
351 | |
352 | /* |
353 | * Reset trackpad device. |
354 | * This is also the default mode when trackpad powered on. |
355 | */ |
356 | static void cypress_reset(struct psmouse *psmouse) |
357 | { |
358 | struct cytp_data *cytp = psmouse->private; |
359 | |
360 | cytp->mode = 0; |
361 | |
362 | psmouse_reset(psmouse); |
363 | } |
364 | |
365 | static int cypress_set_input_params(struct input_dev *input, |
366 | struct cytp_data *cytp) |
367 | { |
368 | int ret; |
369 | |
370 | if (!cytp->tp_res_x || !cytp->tp_res_y) |
371 | return -EINVAL; |
372 | |
373 | __set_bit(EV_ABS, input->evbit); |
374 | input_set_abs_params(dev: input, ABS_X, min: 0, max: cytp->tp_max_abs_x, fuzz: 0, flat: 0); |
375 | input_set_abs_params(dev: input, ABS_Y, min: 0, max: cytp->tp_max_abs_y, fuzz: 0, flat: 0); |
376 | input_set_abs_params(dev: input, ABS_PRESSURE, |
377 | min: cytp->tp_min_pressure, max: cytp->tp_max_pressure, fuzz: 0, flat: 0); |
378 | input_set_abs_params(dev: input, ABS_TOOL_WIDTH, min: 0, max: 255, fuzz: 0, flat: 0); |
379 | |
380 | /* finger position */ |
381 | input_set_abs_params(dev: input, ABS_MT_POSITION_X, min: 0, max: cytp->tp_max_abs_x, fuzz: 0, flat: 0); |
382 | input_set_abs_params(dev: input, ABS_MT_POSITION_Y, min: 0, max: cytp->tp_max_abs_y, fuzz: 0, flat: 0); |
383 | input_set_abs_params(dev: input, ABS_MT_PRESSURE, min: 0, max: 255, fuzz: 0, flat: 0); |
384 | |
385 | ret = input_mt_init_slots(dev: input, CYTP_MAX_MT_SLOTS, |
386 | INPUT_MT_DROP_UNUSED|INPUT_MT_TRACK); |
387 | if (ret < 0) |
388 | return ret; |
389 | |
390 | __set_bit(INPUT_PROP_SEMI_MT, input->propbit); |
391 | |
392 | input_abs_set_res(dev: input, ABS_X, val: cytp->tp_res_x); |
393 | input_abs_set_res(dev: input, ABS_Y, val: cytp->tp_res_y); |
394 | |
395 | input_abs_set_res(dev: input, ABS_MT_POSITION_X, val: cytp->tp_res_x); |
396 | input_abs_set_res(dev: input, ABS_MT_POSITION_Y, val: cytp->tp_res_y); |
397 | |
398 | __set_bit(BTN_TOUCH, input->keybit); |
399 | __set_bit(BTN_TOOL_FINGER, input->keybit); |
400 | __set_bit(BTN_TOOL_DOUBLETAP, input->keybit); |
401 | __set_bit(BTN_TOOL_TRIPLETAP, input->keybit); |
402 | __set_bit(BTN_TOOL_QUADTAP, input->keybit); |
403 | __set_bit(BTN_TOOL_QUINTTAP, input->keybit); |
404 | |
405 | __clear_bit(EV_REL, input->evbit); |
406 | __clear_bit(REL_X, input->relbit); |
407 | __clear_bit(REL_Y, input->relbit); |
408 | |
409 | __set_bit(EV_KEY, input->evbit); |
410 | __set_bit(BTN_LEFT, input->keybit); |
411 | __set_bit(BTN_RIGHT, input->keybit); |
412 | __set_bit(BTN_MIDDLE, input->keybit); |
413 | |
414 | return 0; |
415 | } |
416 | |
417 | static int cypress_get_finger_count(unsigned char ) |
418 | { |
419 | unsigned char bits6_7; |
420 | int finger_count; |
421 | |
422 | bits6_7 = header_byte >> 6; |
423 | finger_count = bits6_7 & 0x03; |
424 | |
425 | if (finger_count == 1) |
426 | return 1; |
427 | |
428 | if (header_byte & ABS_HSCROLL_BIT) { |
429 | /* HSCROLL gets added on to 0 finger count. */ |
430 | switch (finger_count) { |
431 | case 0: return 4; |
432 | case 2: return 5; |
433 | default: |
434 | /* Invalid contact (e.g. palm). Ignore it. */ |
435 | return 0; |
436 | } |
437 | } |
438 | |
439 | return finger_count; |
440 | } |
441 | |
442 | |
443 | static int cypress_parse_packet(struct psmouse *psmouse, |
444 | struct cytp_data *cytp, struct cytp_report_data *report_data) |
445 | { |
446 | unsigned char *packet = psmouse->packet; |
447 | unsigned char = packet[0]; |
448 | |
449 | memset(report_data, 0, sizeof(struct cytp_report_data)); |
450 | |
451 | report_data->contact_cnt = cypress_get_finger_count(header_byte); |
452 | report_data->tap = (header_byte & ABS_MULTIFINGER_TAP) ? 1 : 0; |
453 | |
454 | if (report_data->contact_cnt == 1) { |
455 | report_data->contacts[0].x = |
456 | ((packet[1] & 0x70) << 4) | packet[2]; |
457 | report_data->contacts[0].y = |
458 | ((packet[1] & 0x07) << 8) | packet[3]; |
459 | if (cytp->mode & CYTP_BIT_ABS_PRESSURE) |
460 | report_data->contacts[0].z = packet[4]; |
461 | |
462 | } else if (report_data->contact_cnt >= 2) { |
463 | report_data->contacts[0].x = |
464 | ((packet[1] & 0x70) << 4) | packet[2]; |
465 | report_data->contacts[0].y = |
466 | ((packet[1] & 0x07) << 8) | packet[3]; |
467 | if (cytp->mode & CYTP_BIT_ABS_PRESSURE) |
468 | report_data->contacts[0].z = packet[4]; |
469 | |
470 | report_data->contacts[1].x = |
471 | ((packet[5] & 0xf0) << 4) | packet[6]; |
472 | report_data->contacts[1].y = |
473 | ((packet[5] & 0x0f) << 8) | packet[7]; |
474 | if (cytp->mode & CYTP_BIT_ABS_PRESSURE) |
475 | report_data->contacts[1].z = report_data->contacts[0].z; |
476 | } |
477 | |
478 | report_data->left = (header_byte & BTN_LEFT_BIT) ? 1 : 0; |
479 | report_data->right = (header_byte & BTN_RIGHT_BIT) ? 1 : 0; |
480 | |
481 | /* |
482 | * This is only true if one of the mouse buttons were tapped. Make |
483 | * sure it doesn't turn into a click. The regular tap-to-click |
484 | * functionality will handle that on its own. If we don't do this, |
485 | * disabling tap-to-click won't affect the mouse button zones. |
486 | */ |
487 | if (report_data->tap) |
488 | report_data->left = 0; |
489 | |
490 | #ifdef CYTP_DEBUG_VERBOSE |
491 | { |
492 | int i; |
493 | int n = report_data->contact_cnt; |
494 | psmouse_dbg(psmouse, "Dump parsed report data as below:\n" ); |
495 | psmouse_dbg(psmouse, "contact_cnt = %d\n" , |
496 | report_data->contact_cnt); |
497 | if (n > CYTP_MAX_MT_SLOTS) |
498 | n = CYTP_MAX_MT_SLOTS; |
499 | for (i = 0; i < n; i++) |
500 | psmouse_dbg(psmouse, "contacts[%d] = {%d, %d, %d}\n" , i, |
501 | report_data->contacts[i].x, |
502 | report_data->contacts[i].y, |
503 | report_data->contacts[i].z); |
504 | psmouse_dbg(psmouse, "left = %d\n" , report_data->left); |
505 | psmouse_dbg(psmouse, "right = %d\n" , report_data->right); |
506 | psmouse_dbg(psmouse, "middle = %d\n" , report_data->middle); |
507 | } |
508 | #endif |
509 | |
510 | return 0; |
511 | } |
512 | |
513 | static void cypress_process_packet(struct psmouse *psmouse, bool zero_pkt) |
514 | { |
515 | int i; |
516 | struct input_dev *input = psmouse->dev; |
517 | struct cytp_data *cytp = psmouse->private; |
518 | struct cytp_report_data report_data; |
519 | struct cytp_contact *contact; |
520 | struct input_mt_pos pos[CYTP_MAX_MT_SLOTS]; |
521 | int slots[CYTP_MAX_MT_SLOTS]; |
522 | int n; |
523 | |
524 | cypress_parse_packet(psmouse, cytp, report_data: &report_data); |
525 | |
526 | n = report_data.contact_cnt; |
527 | if (n > CYTP_MAX_MT_SLOTS) |
528 | n = CYTP_MAX_MT_SLOTS; |
529 | |
530 | for (i = 0; i < n; i++) { |
531 | contact = &report_data.contacts[i]; |
532 | pos[i].x = contact->x; |
533 | pos[i].y = contact->y; |
534 | } |
535 | |
536 | input_mt_assign_slots(dev: input, slots, pos, num_pos: n, dmax: 0); |
537 | |
538 | for (i = 0; i < n; i++) { |
539 | contact = &report_data.contacts[i]; |
540 | input_mt_slot(dev: input, slot: slots[i]); |
541 | input_mt_report_slot_state(dev: input, MT_TOOL_FINGER, active: true); |
542 | input_report_abs(dev: input, ABS_MT_POSITION_X, value: contact->x); |
543 | input_report_abs(dev: input, ABS_MT_POSITION_Y, value: contact->y); |
544 | input_report_abs(dev: input, ABS_MT_PRESSURE, value: contact->z); |
545 | } |
546 | |
547 | input_mt_sync_frame(dev: input); |
548 | |
549 | input_mt_report_finger_count(dev: input, count: report_data.contact_cnt); |
550 | |
551 | input_report_key(dev: input, BTN_LEFT, value: report_data.left); |
552 | input_report_key(dev: input, BTN_RIGHT, value: report_data.right); |
553 | input_report_key(dev: input, BTN_MIDDLE, value: report_data.middle); |
554 | |
555 | input_sync(dev: input); |
556 | } |
557 | |
558 | static psmouse_ret_t cypress_validate_byte(struct psmouse *psmouse) |
559 | { |
560 | int contact_cnt; |
561 | int index = psmouse->pktcnt - 1; |
562 | unsigned char *packet = psmouse->packet; |
563 | struct cytp_data *cytp = psmouse->private; |
564 | |
565 | if (index < 0 || index > cytp->pkt_size) |
566 | return PSMOUSE_BAD_DATA; |
567 | |
568 | if (index == 0 && (packet[0] & 0xfc) == 0) { |
569 | /* call packet process for reporting finger leave. */ |
570 | cypress_process_packet(psmouse, zero_pkt: 1); |
571 | return PSMOUSE_FULL_PACKET; |
572 | } |
573 | |
574 | /* |
575 | * Perform validation (and adjust packet size) based only on the |
576 | * first byte; allow all further bytes through. |
577 | */ |
578 | if (index != 0) |
579 | return PSMOUSE_GOOD_DATA; |
580 | |
581 | /* |
582 | * If absolute/relative mode bit has not been set yet, just pass |
583 | * the byte through. |
584 | */ |
585 | if ((cytp->mode & CYTP_BIT_ABS_REL_MASK) == 0) |
586 | return PSMOUSE_GOOD_DATA; |
587 | |
588 | if ((packet[0] & 0x08) == 0x08) |
589 | return PSMOUSE_BAD_DATA; |
590 | |
591 | contact_cnt = cypress_get_finger_count(header_byte: packet[0]); |
592 | if (cytp->mode & CYTP_BIT_ABS_NO_PRESSURE) |
593 | cypress_set_packet_size(psmouse, n: contact_cnt == 2 ? 7 : 4); |
594 | else |
595 | cypress_set_packet_size(psmouse, n: contact_cnt == 2 ? 8 : 5); |
596 | |
597 | return PSMOUSE_GOOD_DATA; |
598 | } |
599 | |
600 | static psmouse_ret_t cypress_protocol_handler(struct psmouse *psmouse) |
601 | { |
602 | struct cytp_data *cytp = psmouse->private; |
603 | |
604 | if (psmouse->pktcnt >= cytp->pkt_size) { |
605 | cypress_process_packet(psmouse, zero_pkt: 0); |
606 | return PSMOUSE_FULL_PACKET; |
607 | } |
608 | |
609 | return cypress_validate_byte(psmouse); |
610 | } |
611 | |
612 | static void cypress_set_rate(struct psmouse *psmouse, unsigned int rate) |
613 | { |
614 | struct cytp_data *cytp = psmouse->private; |
615 | |
616 | if (rate >= 80) { |
617 | psmouse->rate = 80; |
618 | cytp->mode |= CYTP_BIT_HIGH_RATE; |
619 | } else { |
620 | psmouse->rate = 40; |
621 | cytp->mode &= ~CYTP_BIT_HIGH_RATE; |
622 | } |
623 | |
624 | ps2_command(ps2dev: &psmouse->ps2dev, param: (unsigned char *)&psmouse->rate, |
625 | PSMOUSE_CMD_SETRATE); |
626 | } |
627 | |
628 | static void cypress_disconnect(struct psmouse *psmouse) |
629 | { |
630 | cypress_reset(psmouse); |
631 | kfree(objp: psmouse->private); |
632 | psmouse->private = NULL; |
633 | } |
634 | |
635 | static int cypress_reconnect(struct psmouse *psmouse) |
636 | { |
637 | int tries = CYTP_PS2_CMD_TRIES; |
638 | int rc; |
639 | |
640 | do { |
641 | cypress_reset(psmouse); |
642 | rc = cypress_detect(psmouse, set_properties: false); |
643 | } while (rc && (--tries > 0)); |
644 | |
645 | if (rc) { |
646 | psmouse_err(psmouse, "Reconnect: unable to detect trackpad.\n" ); |
647 | return -1; |
648 | } |
649 | |
650 | if (cypress_set_absolute_mode(psmouse)) { |
651 | psmouse_err(psmouse, "Reconnect: Unable to initialize Cypress absolute mode.\n" ); |
652 | return -1; |
653 | } |
654 | |
655 | return 0; |
656 | } |
657 | |
658 | int cypress_init(struct psmouse *psmouse) |
659 | { |
660 | struct cytp_data *cytp; |
661 | |
662 | cytp = kzalloc(size: sizeof(struct cytp_data), GFP_KERNEL); |
663 | if (!cytp) |
664 | return -ENOMEM; |
665 | |
666 | psmouse->private = cytp; |
667 | psmouse->pktsize = 8; |
668 | |
669 | cypress_reset(psmouse); |
670 | |
671 | if (cypress_query_hardware(psmouse)) { |
672 | psmouse_err(psmouse, "Unable to query Trackpad hardware.\n" ); |
673 | goto err_exit; |
674 | } |
675 | |
676 | if (cypress_set_absolute_mode(psmouse)) { |
677 | psmouse_err(psmouse, "init: Unable to initialize Cypress absolute mode.\n" ); |
678 | goto err_exit; |
679 | } |
680 | |
681 | if (cypress_set_input_params(input: psmouse->dev, cytp) < 0) { |
682 | psmouse_err(psmouse, "init: Unable to set input params.\n" ); |
683 | goto err_exit; |
684 | } |
685 | |
686 | psmouse->model = 1; |
687 | psmouse->protocol_handler = cypress_protocol_handler; |
688 | psmouse->set_rate = cypress_set_rate; |
689 | psmouse->disconnect = cypress_disconnect; |
690 | psmouse->reconnect = cypress_reconnect; |
691 | psmouse->cleanup = cypress_reset; |
692 | psmouse->resync_time = 0; |
693 | |
694 | return 0; |
695 | |
696 | err_exit: |
697 | /* |
698 | * Reset Cypress Trackpad as a standard mouse. Then |
699 | * let psmouse driver communicating with it as default PS2 mouse. |
700 | */ |
701 | cypress_reset(psmouse); |
702 | |
703 | psmouse->private = NULL; |
704 | kfree(objp: cytp); |
705 | |
706 | return -1; |
707 | } |
708 | |