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0799a924 DD |
1 | /* |
2 | * Cypress Trackpad PS/2 mouse driver | |
3 | * | |
4 | * Copyright (c) 2012 Cypress Semiconductor Corporation. | |
5 | * | |
6 | * Author: | |
7 | * Dudley Du <dudl@cypress.com> | |
8 | * | |
9 | * Additional contributors include: | |
10 | * Kamal Mostafa <kamal@canonical.com> | |
11 | * Kyle Fazzari <git@status.e4ward.com> | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify it | |
14 | * under the terms of the GNU General Public License version 2 as published by | |
15 | * the Free Software Foundation. | |
16 | */ | |
17 | ||
18 | #include <linux/init.h> | |
19 | #include <linux/module.h> | |
20 | #include <linux/kernel.h> | |
21 | #include <linux/slab.h> | |
22 | #include <linux/serio.h> | |
23 | #include <linux/libps2.h> | |
24 | #include <linux/input.h> | |
25 | #include <linux/input/mt.h> | |
26 | #include <linux/sched.h> | |
27 | #include <linux/wait.h> | |
28 | ||
29 | #include "cypress_ps2.h" | |
30 | ||
31 | #undef CYTP_DEBUG_VERBOSE /* define this and DEBUG for more verbose dump */ | |
32 | ||
33 | static void cypress_set_packet_size(struct psmouse *psmouse, unsigned int n) | |
34 | { | |
35 | struct cytp_data *cytp = psmouse->private; | |
36 | cytp->pkt_size = n; | |
37 | } | |
38 | ||
39 | static const unsigned char cytp_rate[] = {10, 20, 40, 60, 100, 200}; | |
40 | static const unsigned char cytp_resolution[] = {0x00, 0x01, 0x02, 0x03}; | |
41 | ||
42 | static int cypress_ps2_sendbyte(struct psmouse *psmouse, int value) | |
43 | { | |
44 | struct ps2dev *ps2dev = &psmouse->ps2dev; | |
45 | ||
46 | if (ps2_sendbyte(ps2dev, value & 0xff, CYTP_CMD_TIMEOUT) < 0) { | |
47 | psmouse_dbg(psmouse, | |
48 | "sending command 0x%02x failed, resp 0x%02x\n", | |
49 | value & 0xff, ps2dev->nak); | |
50 | if (ps2dev->nak == CYTP_PS2_RETRY) | |
51 | return CYTP_PS2_RETRY; | |
52 | else | |
53 | return CYTP_PS2_ERROR; | |
54 | } | |
55 | ||
56 | #ifdef CYTP_DEBUG_VERBOSE | |
57 | psmouse_dbg(psmouse, "sending command 0x%02x succeeded, resp 0xfa\n", | |
58 | value & 0xff); | |
59 | #endif | |
60 | ||
61 | return 0; | |
62 | } | |
63 | ||
64 | static int cypress_ps2_ext_cmd(struct psmouse *psmouse, unsigned short cmd, | |
65 | unsigned char data) | |
66 | { | |
67 | struct ps2dev *ps2dev = &psmouse->ps2dev; | |
68 | int tries = CYTP_PS2_CMD_TRIES; | |
69 | int rc; | |
70 | ||
71 | ps2_begin_command(ps2dev); | |
72 | ||
73 | do { | |
74 | /* | |
75 | * Send extension command byte (0xE8 or 0xF3). | |
76 | * If sending the command fails, send recovery command | |
77 | * to make the device return to the ready state. | |
78 | */ | |
79 | rc = cypress_ps2_sendbyte(psmouse, cmd & 0xff); | |
80 | if (rc == CYTP_PS2_RETRY) { | |
81 | rc = cypress_ps2_sendbyte(psmouse, 0x00); | |
82 | if (rc == CYTP_PS2_RETRY) | |
83 | rc = cypress_ps2_sendbyte(psmouse, 0x0a); | |
84 | } | |
85 | if (rc == CYTP_PS2_ERROR) | |
86 | continue; | |
87 | ||
88 | rc = cypress_ps2_sendbyte(psmouse, data); | |
89 | if (rc == CYTP_PS2_RETRY) | |
90 | rc = cypress_ps2_sendbyte(psmouse, data); | |
91 | if (rc == CYTP_PS2_ERROR) | |
92 | continue; | |
93 | else | |
94 | break; | |
95 | } while (--tries > 0); | |
96 | ||
97 | ps2_end_command(ps2dev); | |
98 | ||
99 | return rc; | |
100 | } | |
101 | ||
102 | static int cypress_ps2_read_cmd_status(struct psmouse *psmouse, | |
103 | unsigned char cmd, | |
104 | unsigned char *param) | |
105 | { | |
106 | int rc; | |
107 | struct ps2dev *ps2dev = &psmouse->ps2dev; | |
108 | enum psmouse_state old_state; | |
109 | int pktsize; | |
110 | ||
111 | ps2_begin_command(&psmouse->ps2dev); | |
112 | ||
113 | old_state = psmouse->state; | |
114 | psmouse->state = PSMOUSE_CMD_MODE; | |
115 | psmouse->pktcnt = 0; | |
116 | ||
117 | pktsize = (cmd == CYTP_CMD_READ_TP_METRICS) ? 8 : 3; | |
118 | memset(param, 0, pktsize); | |
119 | ||
120 | rc = cypress_ps2_sendbyte(psmouse, 0xe9); | |
121 | if (rc < 0) | |
122 | goto out; | |
123 | ||
124 | wait_event_timeout(ps2dev->wait, | |
125 | (psmouse->pktcnt >= pktsize), | |
126 | msecs_to_jiffies(CYTP_CMD_TIMEOUT)); | |
127 | ||
128 | memcpy(param, psmouse->packet, pktsize); | |
129 | ||
130 | psmouse_dbg(psmouse, "Command 0x%02x response data (0x): %*ph\n", | |
131 | cmd, pktsize, param); | |
132 | ||
133 | out: | |
134 | psmouse->state = old_state; | |
135 | psmouse->pktcnt = 0; | |
136 | ||
137 | ps2_end_command(&psmouse->ps2dev); | |
138 | ||
139 | return rc; | |
140 | } | |
141 | ||
142 | static bool cypress_verify_cmd_state(struct psmouse *psmouse, | |
143 | unsigned char cmd, unsigned char *param) | |
144 | { | |
145 | bool rate_match = false; | |
146 | bool resolution_match = false; | |
147 | int i; | |
148 | ||
149 | /* callers will do further checking. */ | |
150 | if (cmd == CYTP_CMD_READ_CYPRESS_ID || | |
151 | cmd == CYTP_CMD_STANDARD_MODE || | |
152 | cmd == CYTP_CMD_READ_TP_METRICS) | |
153 | return true; | |
154 | ||
155 | if ((~param[0] & DFLT_RESP_BITS_VALID) == DFLT_RESP_BITS_VALID && | |
156 | (param[0] & DFLT_RESP_BIT_MODE) == DFLT_RESP_STREAM_MODE) { | |
157 | for (i = 0; i < sizeof(cytp_resolution); i++) | |
158 | if (cytp_resolution[i] == param[1]) | |
159 | resolution_match = true; | |
160 | ||
161 | for (i = 0; i < sizeof(cytp_rate); i++) | |
162 | if (cytp_rate[i] == param[2]) | |
163 | rate_match = true; | |
164 | ||
165 | if (resolution_match && rate_match) | |
166 | return true; | |
167 | } | |
168 | ||
169 | psmouse_dbg(psmouse, "verify cmd state failed.\n"); | |
170 | return false; | |
171 | } | |
172 | ||
173 | static int cypress_send_ext_cmd(struct psmouse *psmouse, unsigned char cmd, | |
174 | unsigned char *param) | |
175 | { | |
176 | int tries = CYTP_PS2_CMD_TRIES; | |
177 | int rc; | |
178 | ||
179 | psmouse_dbg(psmouse, "send extension cmd 0x%02x, [%d %d %d %d]\n", | |
180 | cmd, DECODE_CMD_AA(cmd), DECODE_CMD_BB(cmd), | |
181 | DECODE_CMD_CC(cmd), DECODE_CMD_DD(cmd)); | |
182 | ||
183 | do { | |
184 | cypress_ps2_ext_cmd(psmouse, | |
185 | PSMOUSE_CMD_SETRES, DECODE_CMD_DD(cmd)); | |
186 | cypress_ps2_ext_cmd(psmouse, | |
187 | PSMOUSE_CMD_SETRES, DECODE_CMD_CC(cmd)); | |
188 | cypress_ps2_ext_cmd(psmouse, | |
189 | PSMOUSE_CMD_SETRES, DECODE_CMD_BB(cmd)); | |
190 | cypress_ps2_ext_cmd(psmouse, | |
191 | PSMOUSE_CMD_SETRES, DECODE_CMD_AA(cmd)); | |
192 | ||
193 | rc = cypress_ps2_read_cmd_status(psmouse, cmd, param); | |
194 | if (rc) | |
195 | continue; | |
196 | ||
197 | if (cypress_verify_cmd_state(psmouse, cmd, param)) | |
198 | return 0; | |
199 | ||
200 | } while (--tries > 0); | |
201 | ||
202 | return -EIO; | |
203 | } | |
204 | ||
205 | int cypress_detect(struct psmouse *psmouse, bool set_properties) | |
206 | { | |
207 | unsigned char param[3]; | |
208 | ||
209 | if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_CYPRESS_ID, param)) | |
210 | return -ENODEV; | |
211 | ||
212 | /* Check for Cypress Trackpad signature bytes: 0x33 0xCC */ | |
213 | if (param[0] != 0x33 || param[1] != 0xCC) | |
214 | return -ENODEV; | |
215 | ||
216 | if (set_properties) { | |
217 | psmouse->vendor = "Cypress"; | |
218 | psmouse->name = "Trackpad"; | |
219 | } | |
220 | ||
221 | return 0; | |
222 | } | |
223 | ||
224 | static int cypress_read_fw_version(struct psmouse *psmouse) | |
225 | { | |
226 | struct cytp_data *cytp = psmouse->private; | |
227 | unsigned char param[3]; | |
228 | ||
229 | if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_CYPRESS_ID, param)) | |
230 | return -ENODEV; | |
231 | ||
232 | /* Check for Cypress Trackpad signature bytes: 0x33 0xCC */ | |
233 | if (param[0] != 0x33 || param[1] != 0xCC) | |
234 | return -ENODEV; | |
235 | ||
236 | cytp->fw_version = param[2] & FW_VERSION_MASX; | |
237 | cytp->tp_metrics_supported = (param[2] & TP_METRICS_MASK) ? 1 : 0; | |
238 | ||
239 | psmouse_dbg(psmouse, "cytp->fw_version = %d\n", cytp->fw_version); | |
240 | psmouse_dbg(psmouse, "cytp->tp_metrics_supported = %d\n", | |
241 | cytp->tp_metrics_supported); | |
242 | ||
243 | return 0; | |
244 | } | |
245 | ||
246 | static int cypress_read_tp_metrics(struct psmouse *psmouse) | |
247 | { | |
248 | struct cytp_data *cytp = psmouse->private; | |
249 | unsigned char param[8]; | |
250 | ||
251 | /* set default values for tp metrics. */ | |
252 | cytp->tp_width = CYTP_DEFAULT_WIDTH; | |
253 | cytp->tp_high = CYTP_DEFAULT_HIGH; | |
254 | cytp->tp_max_abs_x = CYTP_ABS_MAX_X; | |
255 | cytp->tp_max_abs_y = CYTP_ABS_MAX_Y; | |
256 | cytp->tp_min_pressure = CYTP_MIN_PRESSURE; | |
257 | cytp->tp_max_pressure = CYTP_MAX_PRESSURE; | |
258 | cytp->tp_res_x = cytp->tp_max_abs_x / cytp->tp_width; | |
259 | cytp->tp_res_y = cytp->tp_max_abs_y / cytp->tp_high; | |
260 | ||
261 | memset(param, 0, sizeof(param)); | |
262 | if (cypress_send_ext_cmd(psmouse, CYTP_CMD_READ_TP_METRICS, param) == 0) { | |
263 | /* Update trackpad parameters. */ | |
264 | cytp->tp_max_abs_x = (param[1] << 8) | param[0]; | |
265 | cytp->tp_max_abs_y = (param[3] << 8) | param[2]; | |
266 | cytp->tp_min_pressure = param[4]; | |
267 | cytp->tp_max_pressure = param[5]; | |
268 | } | |
269 | ||
270 | if (!cytp->tp_max_pressure || | |
271 | cytp->tp_max_pressure < cytp->tp_min_pressure || | |
272 | !cytp->tp_width || !cytp->tp_high || | |
273 | !cytp->tp_max_abs_x || | |
274 | cytp->tp_max_abs_x < cytp->tp_width || | |
275 | !cytp->tp_max_abs_y || | |
276 | cytp->tp_max_abs_y < cytp->tp_high) | |
277 | return -EINVAL; | |
278 | ||
279 | cytp->tp_res_x = cytp->tp_max_abs_x / cytp->tp_width; | |
280 | cytp->tp_res_y = cytp->tp_max_abs_y / cytp->tp_high; | |
281 | ||
282 | #ifdef CYTP_DEBUG_VERBOSE | |
283 | psmouse_dbg(psmouse, "Dump trackpad hardware configuration as below:\n"); | |
284 | psmouse_dbg(psmouse, "cytp->tp_width = %d\n", cytp->tp_width); | |
285 | psmouse_dbg(psmouse, "cytp->tp_high = %d\n", cytp->tp_high); | |
286 | psmouse_dbg(psmouse, "cytp->tp_max_abs_x = %d\n", cytp->tp_max_abs_x); | |
287 | psmouse_dbg(psmouse, "cytp->tp_max_abs_y = %d\n", cytp->tp_max_abs_y); | |
288 | psmouse_dbg(psmouse, "cytp->tp_min_pressure = %d\n", cytp->tp_min_pressure); | |
289 | psmouse_dbg(psmouse, "cytp->tp_max_pressure = %d\n", cytp->tp_max_pressure); | |
290 | psmouse_dbg(psmouse, "cytp->tp_res_x = %d\n", cytp->tp_res_x); | |
291 | psmouse_dbg(psmouse, "cytp->tp_res_y = %d\n", cytp->tp_res_y); | |
292 | ||
293 | psmouse_dbg(psmouse, "tp_type_APA = %d\n", | |
294 | (param[6] & TP_METRICS_BIT_APA) ? 1 : 0); | |
295 | psmouse_dbg(psmouse, "tp_type_MTG = %d\n", | |
296 | (param[6] & TP_METRICS_BIT_MTG) ? 1 : 0); | |
297 | psmouse_dbg(psmouse, "tp_palm = %d\n", | |
298 | (param[6] & TP_METRICS_BIT_PALM) ? 1 : 0); | |
299 | psmouse_dbg(psmouse, "tp_stubborn = %d\n", | |
300 | (param[6] & TP_METRICS_BIT_STUBBORN) ? 1 : 0); | |
301 | psmouse_dbg(psmouse, "tp_1f_jitter = %d\n", | |
302 | (param[6] & TP_METRICS_BIT_1F_JITTER) >> 2); | |
303 | psmouse_dbg(psmouse, "tp_2f_jitter = %d\n", | |
304 | (param[6] & TP_METRICS_BIT_2F_JITTER) >> 4); | |
305 | psmouse_dbg(psmouse, "tp_1f_spike = %d\n", | |
306 | param[7] & TP_METRICS_BIT_1F_SPIKE); | |
307 | psmouse_dbg(psmouse, "tp_2f_spike = %d\n", | |
308 | (param[7] & TP_METRICS_BIT_2F_SPIKE) >> 2); | |
309 | psmouse_dbg(psmouse, "tp_abs_packet_format_set = %d\n", | |
310 | (param[7] & TP_METRICS_BIT_ABS_PKT_FORMAT_SET) >> 4); | |
311 | #endif | |
312 | ||
313 | return 0; | |
314 | } | |
315 | ||
316 | static int cypress_query_hardware(struct psmouse *psmouse) | |
317 | { | |
318 | struct cytp_data *cytp = psmouse->private; | |
319 | int ret; | |
320 | ||
321 | ret = cypress_read_fw_version(psmouse); | |
322 | if (ret) | |
323 | return ret; | |
324 | ||
325 | if (cytp->tp_metrics_supported) { | |
326 | ret = cypress_read_tp_metrics(psmouse); | |
327 | if (ret) | |
328 | return ret; | |
329 | } | |
330 | ||
331 | return 0; | |
332 | } | |
333 | ||
334 | static int cypress_set_absolute_mode(struct psmouse *psmouse) | |
335 | { | |
336 | struct cytp_data *cytp = psmouse->private; | |
337 | unsigned char param[3]; | |
338 | ||
339 | if (cypress_send_ext_cmd(psmouse, CYTP_CMD_ABS_WITH_PRESSURE_MODE, param) < 0) | |
340 | return -1; | |
341 | ||
342 | cytp->mode = (cytp->mode & ~CYTP_BIT_ABS_REL_MASK) | |
343 | | CYTP_BIT_ABS_PRESSURE; | |
344 | cypress_set_packet_size(psmouse, 5); | |
345 | ||
346 | return 0; | |
347 | } | |
348 | ||
349 | /* | |
350 | * Reset trackpad device. | |
351 | * This is also the default mode when trackpad powered on. | |
352 | */ | |
353 | static void cypress_reset(struct psmouse *psmouse) | |
354 | { | |
355 | struct cytp_data *cytp = psmouse->private; | |
356 | ||
357 | cytp->mode = 0; | |
358 | ||
359 | psmouse_reset(psmouse); | |
360 | } | |
361 | ||
362 | static int cypress_set_input_params(struct input_dev *input, | |
363 | struct cytp_data *cytp) | |
364 | { | |
365 | int ret; | |
366 | ||
367 | if (!cytp->tp_res_x || !cytp->tp_res_y) | |
368 | return -EINVAL; | |
369 | ||
370 | __set_bit(EV_ABS, input->evbit); | |
371 | input_set_abs_params(input, ABS_X, 0, cytp->tp_max_abs_x, 0, 0); | |
372 | input_set_abs_params(input, ABS_Y, 0, cytp->tp_max_abs_y, 0, 0); | |
373 | input_set_abs_params(input, ABS_PRESSURE, | |
374 | cytp->tp_min_pressure, cytp->tp_max_pressure, 0, 0); | |
375 | input_set_abs_params(input, ABS_TOOL_WIDTH, 0, 255, 0, 0); | |
376 | ||
377 | /* finger position */ | |
378 | input_set_abs_params(input, ABS_MT_POSITION_X, 0, cytp->tp_max_abs_x, 0, 0); | |
379 | input_set_abs_params(input, ABS_MT_POSITION_Y, 0, cytp->tp_max_abs_y, 0, 0); | |
380 | input_set_abs_params(input, ABS_MT_PRESSURE, 0, 255, 0, 0); | |
381 | ||
382 | ret = input_mt_init_slots(input, CYTP_MAX_MT_SLOTS, | |
383 | INPUT_MT_DROP_UNUSED|INPUT_MT_TRACK); | |
384 | if (ret < 0) | |
385 | return ret; | |
386 | ||
387 | __set_bit(INPUT_PROP_SEMI_MT, input->propbit); | |
388 | ||
389 | input_abs_set_res(input, ABS_X, cytp->tp_res_x); | |
390 | input_abs_set_res(input, ABS_Y, cytp->tp_res_y); | |
391 | ||
392 | input_abs_set_res(input, ABS_MT_POSITION_X, cytp->tp_res_x); | |
393 | input_abs_set_res(input, ABS_MT_POSITION_Y, cytp->tp_res_y); | |
394 | ||
395 | __set_bit(BTN_TOUCH, input->keybit); | |
396 | __set_bit(BTN_TOOL_FINGER, input->keybit); | |
397 | __set_bit(BTN_TOOL_DOUBLETAP, input->keybit); | |
398 | __set_bit(BTN_TOOL_TRIPLETAP, input->keybit); | |
399 | __set_bit(BTN_TOOL_QUADTAP, input->keybit); | |
400 | __set_bit(BTN_TOOL_QUINTTAP, input->keybit); | |
401 | ||
402 | __clear_bit(EV_REL, input->evbit); | |
403 | __clear_bit(REL_X, input->relbit); | |
404 | __clear_bit(REL_Y, input->relbit); | |
405 | ||
406 | __set_bit(INPUT_PROP_BUTTONPAD, input->propbit); | |
407 | __set_bit(EV_KEY, input->evbit); | |
408 | __set_bit(BTN_LEFT, input->keybit); | |
409 | __set_bit(BTN_RIGHT, input->keybit); | |
410 | __set_bit(BTN_MIDDLE, input->keybit); | |
411 | ||
412 | input_set_drvdata(input, cytp); | |
413 | ||
414 | return 0; | |
415 | } | |
416 | ||
417 | static int cypress_get_finger_count(unsigned char header_byte) | |
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 -1; | |
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 header_byte = packet[0]; | |
448 | int contact_cnt; | |
449 | ||
450 | memset(report_data, 0, sizeof(struct cytp_report_data)); | |
451 | ||
452 | contact_cnt = cypress_get_finger_count(header_byte); | |
453 | ||
454 | if (contact_cnt < 0) /* e.g. palm detect */ | |
455 | return -EINVAL; | |
456 | ||
457 | report_data->contact_cnt = contact_cnt; | |
458 | ||
459 | report_data->tap = (header_byte & ABS_MULTIFINGER_TAP) ? 1 : 0; | |
460 | ||
461 | if (report_data->contact_cnt == 1) { | |
462 | report_data->contacts[0].x = | |
463 | ((packet[1] & 0x70) << 4) | packet[2]; | |
464 | report_data->contacts[0].y = | |
465 | ((packet[1] & 0x07) << 8) | packet[3]; | |
466 | if (cytp->mode & CYTP_BIT_ABS_PRESSURE) | |
467 | report_data->contacts[0].z = packet[4]; | |
468 | ||
469 | } else if (report_data->contact_cnt >= 2) { | |
470 | report_data->contacts[0].x = | |
471 | ((packet[1] & 0x70) << 4) | packet[2]; | |
472 | report_data->contacts[0].y = | |
473 | ((packet[1] & 0x07) << 8) | packet[3]; | |
474 | if (cytp->mode & CYTP_BIT_ABS_PRESSURE) | |
475 | report_data->contacts[0].z = packet[4]; | |
476 | ||
477 | report_data->contacts[1].x = | |
478 | ((packet[5] & 0xf0) << 4) | packet[6]; | |
479 | report_data->contacts[1].y = | |
480 | ((packet[5] & 0x0f) << 8) | packet[7]; | |
481 | if (cytp->mode & CYTP_BIT_ABS_PRESSURE) | |
482 | report_data->contacts[1].z = report_data->contacts[0].z; | |
483 | } | |
484 | ||
485 | report_data->left = (header_byte & BTN_LEFT_BIT) ? 1 : 0; | |
486 | report_data->right = (header_byte & BTN_RIGHT_BIT) ? 1 : 0; | |
487 | ||
488 | /* | |
489 | * This is only true if one of the mouse buttons were tapped. Make | |
490 | * sure it doesn't turn into a click. The regular tap-to-click | |
491 | * functionality will handle that on its own. If we don't do this, | |
492 | * disabling tap-to-click won't affect the mouse button zones. | |
493 | */ | |
494 | if (report_data->tap) | |
495 | report_data->left = 0; | |
496 | ||
497 | #ifdef CYTP_DEBUG_VERBOSE | |
498 | { | |
499 | int i; | |
500 | int n = report_data->contact_cnt; | |
501 | psmouse_dbg(psmouse, "Dump parsed report data as below:\n"); | |
502 | psmouse_dbg(psmouse, "contact_cnt = %d\n", | |
503 | report_data->contact_cnt); | |
504 | if (n > CYTP_MAX_MT_SLOTS) | |
505 | n = CYTP_MAX_MT_SLOTS; | |
506 | for (i = 0; i < n; i++) | |
507 | psmouse_dbg(psmouse, "contacts[%d] = {%d, %d, %d}\n", i, | |
508 | report_data->contacts[i].x, | |
509 | report_data->contacts[i].y, | |
510 | report_data->contacts[i].z); | |
511 | psmouse_dbg(psmouse, "left = %d\n", report_data->left); | |
512 | psmouse_dbg(psmouse, "right = %d\n", report_data->right); | |
513 | psmouse_dbg(psmouse, "middle = %d\n", report_data->middle); | |
514 | } | |
515 | #endif | |
516 | ||
517 | return 0; | |
518 | } | |
519 | ||
520 | static void cypress_process_packet(struct psmouse *psmouse, bool zero_pkt) | |
521 | { | |
522 | int i; | |
523 | struct input_dev *input = psmouse->dev; | |
524 | struct cytp_data *cytp = psmouse->private; | |
525 | struct cytp_report_data report_data; | |
526 | struct cytp_contact *contact; | |
527 | struct input_mt_pos pos[CYTP_MAX_MT_SLOTS]; | |
528 | int slots[CYTP_MAX_MT_SLOTS]; | |
529 | int n; | |
530 | ||
531 | if (cypress_parse_packet(psmouse, cytp, &report_data)) | |
532 | return; | |
533 | ||
534 | n = report_data.contact_cnt; | |
535 | ||
536 | if (n > CYTP_MAX_MT_SLOTS) | |
537 | n = CYTP_MAX_MT_SLOTS; | |
538 | ||
539 | for (i = 0; i < n; i++) { | |
540 | contact = &report_data.contacts[i]; | |
541 | pos[i].x = contact->x; | |
542 | pos[i].y = contact->y; | |
543 | } | |
544 | ||
545 | input_mt_assign_slots(input, slots, pos, n); | |
546 | ||
547 | for (i = 0; i < n; i++) { | |
548 | contact = &report_data.contacts[i]; | |
549 | input_mt_slot(input, slots[i]); | |
550 | input_mt_report_slot_state(input, MT_TOOL_FINGER, true); | |
551 | input_report_abs(input, ABS_MT_POSITION_X, contact->x); | |
552 | input_report_abs(input, ABS_MT_POSITION_Y, contact->y); | |
553 | input_report_abs(input, ABS_MT_PRESSURE, contact->z); | |
554 | } | |
555 | ||
556 | input_mt_sync_frame(input); | |
557 | ||
558 | input_mt_report_finger_count(input, report_data.contact_cnt); | |
559 | ||
560 | input_report_key(input, BTN_LEFT, report_data.left); | |
561 | input_report_key(input, BTN_RIGHT, report_data.right); | |
562 | input_report_key(input, BTN_MIDDLE, report_data.middle); | |
563 | ||
564 | input_sync(input); | |
565 | } | |
566 | ||
567 | static psmouse_ret_t cypress_validate_byte(struct psmouse *psmouse) | |
568 | { | |
569 | int contact_cnt; | |
570 | int index = psmouse->pktcnt - 1; | |
571 | unsigned char *packet = psmouse->packet; | |
572 | struct cytp_data *cytp = psmouse->private; | |
573 | ||
574 | if (index < 0 || index > cytp->pkt_size) | |
575 | return PSMOUSE_BAD_DATA; | |
576 | ||
577 | if (index == 0 && (packet[0] & 0xfc) == 0) { | |
578 | /* call packet process for reporting finger leave. */ | |
579 | cypress_process_packet(psmouse, 1); | |
580 | return PSMOUSE_FULL_PACKET; | |
581 | } | |
582 | ||
583 | /* | |
584 | * Perform validation (and adjust packet size) based only on the | |
585 | * first byte; allow all further bytes through. | |
586 | */ | |
587 | if (index != 0) | |
588 | return PSMOUSE_GOOD_DATA; | |
589 | ||
590 | /* | |
591 | * If absolute/relative mode bit has not been set yet, just pass | |
592 | * the byte through. | |
593 | */ | |
594 | if ((cytp->mode & CYTP_BIT_ABS_REL_MASK) == 0) | |
595 | return PSMOUSE_GOOD_DATA; | |
596 | ||
597 | if ((packet[0] & 0x08) == 0x08) | |
598 | return PSMOUSE_BAD_DATA; | |
599 | ||
600 | contact_cnt = cypress_get_finger_count(packet[0]); | |
601 | ||
602 | if (contact_cnt < 0) | |
603 | return PSMOUSE_BAD_DATA; | |
604 | ||
605 | if (cytp->mode & CYTP_BIT_ABS_NO_PRESSURE) | |
606 | cypress_set_packet_size(psmouse, contact_cnt == 2 ? 7 : 4); | |
607 | else | |
608 | cypress_set_packet_size(psmouse, contact_cnt == 2 ? 8 : 5); | |
609 | ||
610 | return PSMOUSE_GOOD_DATA; | |
611 | } | |
612 | ||
613 | static psmouse_ret_t cypress_protocol_handler(struct psmouse *psmouse) | |
614 | { | |
615 | struct cytp_data *cytp = psmouse->private; | |
616 | ||
617 | if (psmouse->pktcnt >= cytp->pkt_size) { | |
618 | cypress_process_packet(psmouse, 0); | |
619 | return PSMOUSE_FULL_PACKET; | |
620 | } | |
621 | ||
622 | return cypress_validate_byte(psmouse); | |
623 | } | |
624 | ||
625 | static void cypress_set_rate(struct psmouse *psmouse, unsigned int rate) | |
626 | { | |
627 | struct cytp_data *cytp = psmouse->private; | |
628 | ||
629 | if (rate >= 80) { | |
630 | psmouse->rate = 80; | |
631 | cytp->mode |= CYTP_BIT_HIGH_RATE; | |
632 | } else { | |
633 | psmouse->rate = 40; | |
634 | cytp->mode &= ~CYTP_BIT_HIGH_RATE; | |
635 | } | |
636 | ||
637 | ps2_command(&psmouse->ps2dev, (unsigned char *)&psmouse->rate, | |
638 | PSMOUSE_CMD_SETRATE); | |
639 | } | |
640 | ||
641 | static void cypress_disconnect(struct psmouse *psmouse) | |
642 | { | |
643 | cypress_reset(psmouse); | |
644 | kfree(psmouse->private); | |
645 | psmouse->private = NULL; | |
646 | } | |
647 | ||
648 | static int cypress_reconnect(struct psmouse *psmouse) | |
649 | { | |
650 | int tries = CYTP_PS2_CMD_TRIES; | |
651 | int rc; | |
652 | ||
653 | do { | |
654 | cypress_reset(psmouse); | |
655 | rc = cypress_detect(psmouse, false); | |
656 | } while (rc && (--tries > 0)); | |
657 | ||
658 | if (rc) { | |
659 | psmouse_err(psmouse, "Reconnect: unable to detect trackpad.\n"); | |
660 | return -1; | |
661 | } | |
662 | ||
663 | if (cypress_set_absolute_mode(psmouse)) { | |
664 | psmouse_err(psmouse, "Reconnect: Unable to initialize Cypress absolute mode.\n"); | |
665 | return -1; | |
666 | } | |
667 | ||
668 | return 0; | |
669 | } | |
670 | ||
671 | int cypress_init(struct psmouse *psmouse) | |
672 | { | |
673 | struct cytp_data *cytp; | |
674 | ||
675 | cytp = (struct cytp_data *)kzalloc(sizeof(struct cytp_data), GFP_KERNEL); | |
676 | psmouse->private = (void *)cytp; | |
677 | if (cytp == NULL) | |
678 | return -ENOMEM; | |
679 | ||
680 | cypress_reset(psmouse); | |
681 | ||
682 | psmouse->pktsize = 8; | |
683 | ||
684 | if (cypress_query_hardware(psmouse)) { | |
685 | psmouse_err(psmouse, "Unable to query Trackpad hardware.\n"); | |
686 | goto err_exit; | |
687 | } | |
688 | ||
689 | if (cypress_set_absolute_mode(psmouse)) { | |
690 | psmouse_err(psmouse, "init: Unable to initialize Cypress absolute mode.\n"); | |
691 | goto err_exit; | |
692 | } | |
693 | ||
694 | if (cypress_set_input_params(psmouse->dev, cytp) < 0) { | |
695 | psmouse_err(psmouse, "init: Unable to set input params.\n"); | |
696 | goto err_exit; | |
697 | } | |
698 | ||
699 | psmouse->model = 1; | |
700 | psmouse->protocol_handler = cypress_protocol_handler; | |
701 | psmouse->set_rate = cypress_set_rate; | |
702 | psmouse->disconnect = cypress_disconnect; | |
703 | psmouse->reconnect = cypress_reconnect; | |
704 | psmouse->cleanup = cypress_reset; | |
705 | psmouse->resync_time = 0; | |
706 | ||
707 | return 0; | |
708 | ||
709 | err_exit: | |
710 | /* | |
711 | * Reset Cypress Trackpad as a standard mouse. Then | |
712 | * let psmouse driver commmunicating with it as default PS2 mouse. | |
713 | */ | |
714 | cypress_reset(psmouse); | |
715 | ||
716 | psmouse->private = NULL; | |
717 | kfree(cytp); | |
718 | ||
719 | return -1; | |
720 | } | |
721 | ||
722 | bool cypress_supported(void) | |
723 | { | |
724 | return true; | |
725 | } |