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eba499d3 NKG |
1 | /** |
2 | * | |
3 | * Synaptics Register Mapped Interface (RMI4) I2C Physical Layer Driver. | |
4 | * Copyright (c) 2007-2010, Synaptics Incorporated | |
5 | * | |
6 | * Author: Js HA <js.ha@stericsson.com> for ST-Ericsson | |
7 | * Author: Naveen Kumar G <naveen.gaddipati@stericsson.com> for ST-Ericsson | |
8 | * Copyright 2010 (c) ST-Ericsson AB | |
9 | */ | |
10 | /* | |
11 | * This file is licensed under the GPL2 license. | |
12 | * | |
13 | *############################################################################# | |
14 | * GPL | |
15 | * | |
16 | * This program is free software; you can redistribute it and/or modify it | |
17 | * under the terms of the GNU General Public License version 2 as published | |
18 | * by the Free Software Foundation. | |
19 | * | |
20 | * This program is distributed in the hope that it will be useful, but | |
21 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
22 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
23 | * for more details. | |
24 | * | |
25 | *############################################################################# | |
26 | */ | |
27 | ||
28 | #include <linux/input.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/i2c.h> | |
31 | #include <linux/interrupt.h> | |
32 | #include <linux/regulator/consumer.h> | |
99c97852 | 33 | #include <linux/module.h> |
a13ea24e | 34 | #include <linux/input/mt.h> |
eba499d3 NKG |
35 | #include "synaptics_i2c_rmi4.h" |
36 | ||
37 | /* TODO: for multiple device support will need a per-device mutex */ | |
38 | #define DRIVER_NAME "synaptics_rmi4_i2c" | |
39 | ||
40 | #define MAX_ERROR_REPORT 6 | |
41 | #define MAX_TOUCH_MAJOR 15 | |
42 | #define MAX_RETRY_COUNT 5 | |
43 | #define STD_QUERY_LEN 21 | |
44 | #define PAGE_LEN 2 | |
45 | #define DATA_BUF_LEN 32 | |
46 | #define BUF_LEN 37 | |
47 | #define QUERY_LEN 9 | |
48 | #define DATA_LEN 12 | |
49 | #define HAS_TAP 0x01 | |
50 | #define HAS_PALMDETECT 0x01 | |
51 | #define HAS_ROTATE 0x02 | |
52 | #define HAS_TAPANDHOLD 0x02 | |
53 | #define HAS_DOUBLETAP 0x04 | |
54 | #define HAS_EARLYTAP 0x08 | |
55 | #define HAS_RELEASE 0x08 | |
56 | #define HAS_FLICK 0x10 | |
57 | #define HAS_PRESS 0x20 | |
58 | #define HAS_PINCH 0x40 | |
59 | ||
60 | #define MASK_16BIT 0xFFFF | |
61 | #define MASK_8BIT 0xFF | |
62 | #define MASK_7BIT 0x7F | |
63 | #define MASK_5BIT 0x1F | |
64 | #define MASK_4BIT 0x0F | |
65 | #define MASK_3BIT 0x07 | |
66 | #define MASK_2BIT 0x03 | |
67 | #define TOUCHPAD_CTRL_INTR 0x8 | |
68 | #define PDT_START_SCAN_LOCATION (0x00E9) | |
69 | #define PDT_END_SCAN_LOCATION (0x000A) | |
70 | #define PDT_ENTRY_SIZE (0x0006) | |
eba499d3 NKG |
71 | #define SYNAPTICS_RMI4_TOUCHPAD_FUNC_NUM (0x11) |
72 | #define SYNAPTICS_RMI4_DEVICE_CONTROL_FUNC_NUM (0x01) | |
73 | ||
74 | /** | |
25985edc | 75 | * struct synaptics_rmi4_fn_desc - contains the function descriptor information |
eba499d3 NKG |
76 | * @query_base_addr: base address for query |
77 | * @cmd_base_addr: base address for command | |
78 | * @ctrl_base_addr: base address for control | |
79 | * @data_base_addr: base address for data | |
80 | * @intr_src_count: count for the interrupt source | |
81 | * @fn_number: function number | |
82 | * | |
83 | * This structure is used to gives the function descriptor information | |
84 | * of the particular functionality. | |
85 | */ | |
86 | struct synaptics_rmi4_fn_desc { | |
87 | unsigned char query_base_addr; | |
88 | unsigned char cmd_base_addr; | |
89 | unsigned char ctrl_base_addr; | |
90 | unsigned char data_base_addr; | |
91 | unsigned char intr_src_count; | |
92 | unsigned char fn_number; | |
93 | }; | |
94 | ||
95 | /** | |
25985edc | 96 | * struct synaptics_rmi4_fn - contains the function information |
eba499d3 NKG |
97 | * @fn_number: function number |
98 | * @num_of_data_sources: number of data sources | |
99 | * @num_of_data_points: number of fingers touched | |
100 | * @size_of_data_register_block: data register block size | |
101 | * @index_to_intr_reg: index for interrupt register | |
102 | * @intr_mask: interrupt mask value | |
103 | * @fn_desc: variable for function descriptor structure | |
104 | * @link: linked list for function descriptors | |
105 | * | |
106 | * This structure gives information about the number of data sources and | |
107 | * the number of data registers associated with the function. | |
108 | */ | |
109 | struct synaptics_rmi4_fn { | |
110 | unsigned char fn_number; | |
111 | unsigned char num_of_data_sources; | |
112 | unsigned char num_of_data_points; | |
113 | unsigned char size_of_data_register_block; | |
114 | unsigned char index_to_intr_reg; | |
115 | unsigned char intr_mask; | |
116 | struct synaptics_rmi4_fn_desc fn_desc; | |
117 | struct list_head link; | |
118 | }; | |
119 | ||
120 | /** | |
121 | * struct synaptics_rmi4_device_info - contains the rmi4 device information | |
122 | * @version_major: protocol major version number | |
123 | * @version_minor: protocol minor version number | |
124 | * @manufacturer_id: manufacturer identification byte | |
125 | * @product_props: product properties information | |
126 | * @product_info: product info array | |
127 | * @date_code: device manufacture date | |
128 | * @tester_id: tester id array | |
129 | * @serial_number: serial number for that device | |
130 | * @product_id_string: product id for the device | |
131 | * @support_fn_list: linked list for device information | |
132 | * | |
133 | * This structure gives information about the number of data sources and | |
134 | * the number of data registers associated with the function. | |
135 | */ | |
136 | struct synaptics_rmi4_device_info { | |
137 | unsigned int version_major; | |
138 | unsigned int version_minor; | |
139 | unsigned char manufacturer_id; | |
140 | unsigned char product_props; | |
141 | unsigned char product_info[2]; | |
142 | unsigned char date_code[3]; | |
143 | unsigned short tester_id; | |
144 | unsigned short serial_number; | |
145 | unsigned char product_id_string[11]; | |
146 | struct list_head support_fn_list; | |
147 | }; | |
148 | ||
149 | /** | |
150 | * struct synaptics_rmi4_data - contains the rmi4 device data | |
151 | * @rmi4_mod_info: structure variable for rmi4 device info | |
152 | * @input_dev: pointer for input device | |
153 | * @i2c_client: pointer for i2c client | |
154 | * @board: constant pointer for touch platform data | |
25985edc | 155 | * @fn_list_mutex: mutex for function list |
eba499d3 NKG |
156 | * @rmi4_page_mutex: mutex for rmi4 page |
157 | * @current_page: variable for integer | |
158 | * @number_of_interrupt_register: interrupt registers count | |
159 | * @fn01_ctrl_base_addr: control base address for fn01 | |
160 | * @fn01_query_base_addr: query base address for fn01 | |
161 | * @fn01_data_base_addr: data base address for fn01 | |
162 | * @sensor_max_x: sensor maximum x value | |
163 | * @sensor_max_y: sensor maximum y value | |
164 | * @regulator: pointer to the regulator structure | |
165 | * @wait: wait queue structure variable | |
166 | * @touch_stopped: flag to stop the thread function | |
a13ea24e | 167 | * @fingers_supported: maximum supported fingers |
eba499d3 NKG |
168 | * |
169 | * This structure gives the device data information. | |
170 | */ | |
171 | struct synaptics_rmi4_data { | |
172 | struct synaptics_rmi4_device_info rmi4_mod_info; | |
173 | struct input_dev *input_dev; | |
174 | struct i2c_client *i2c_client; | |
175 | const struct synaptics_rmi4_platform_data *board; | |
176 | struct mutex fn_list_mutex; | |
177 | struct mutex rmi4_page_mutex; | |
178 | int current_page; | |
179 | unsigned int number_of_interrupt_register; | |
180 | unsigned short fn01_ctrl_base_addr; | |
181 | unsigned short fn01_query_base_addr; | |
182 | unsigned short fn01_data_base_addr; | |
183 | int sensor_max_x; | |
184 | int sensor_max_y; | |
185 | struct regulator *regulator; | |
186 | wait_queue_head_t wait; | |
187 | bool touch_stopped; | |
a13ea24e | 188 | unsigned char fingers_supported; |
eba499d3 NKG |
189 | }; |
190 | ||
191 | /** | |
192 | * synaptics_rmi4_set_page() - sets the page | |
193 | * @pdata: pointer to synaptics_rmi4_data structure | |
194 | * @address: set the address of the page | |
195 | * | |
196 | * This function is used to set the page and returns integer. | |
197 | */ | |
198 | static int synaptics_rmi4_set_page(struct synaptics_rmi4_data *pdata, | |
199 | unsigned int address) | |
200 | { | |
201 | unsigned char txbuf[PAGE_LEN]; | |
202 | int retval; | |
203 | unsigned int page; | |
204 | struct i2c_client *i2c = pdata->i2c_client; | |
205 | ||
206 | page = ((address >> 8) & MASK_8BIT); | |
207 | if (page != pdata->current_page) { | |
208 | txbuf[0] = MASK_8BIT; | |
209 | txbuf[1] = page; | |
210 | retval = i2c_master_send(i2c, txbuf, PAGE_LEN); | |
211 | if (retval != PAGE_LEN) | |
212 | dev_err(&i2c->dev, "%s:failed:%d\n", __func__, retval); | |
213 | else | |
214 | pdata->current_page = page; | |
215 | } else | |
216 | retval = PAGE_LEN; | |
217 | return retval; | |
218 | } | |
219 | /** | |
220 | * synaptics_rmi4_i2c_block_read() - read the block of data | |
221 | * @pdata: pointer to synaptics_rmi4_data structure | |
222 | * @address: read the block of data from this offset | |
223 | * @valp: pointer to a buffer containing the data to be read | |
224 | * @size: number of bytes to read | |
225 | * | |
226 | * This function is to read the block of data and returns integer. | |
227 | */ | |
228 | static int synaptics_rmi4_i2c_block_read(struct synaptics_rmi4_data *pdata, | |
229 | unsigned short address, | |
230 | unsigned char *valp, int size) | |
231 | { | |
232 | int retval = 0; | |
233 | int retry_count = 0; | |
234 | int index; | |
235 | struct i2c_client *i2c = pdata->i2c_client; | |
236 | ||
237 | mutex_lock(&(pdata->rmi4_page_mutex)); | |
238 | retval = synaptics_rmi4_set_page(pdata, address); | |
239 | if (retval != PAGE_LEN) | |
240 | goto exit; | |
241 | index = address & MASK_8BIT; | |
242 | retry: | |
243 | retval = i2c_smbus_read_i2c_block_data(i2c, index, size, valp); | |
244 | if (retval != size) { | |
245 | if (++retry_count == MAX_RETRY_COUNT) | |
246 | dev_err(&i2c->dev, | |
247 | "%s:address 0x%04x size %d failed:%d\n", | |
248 | __func__, address, size, retval); | |
249 | else { | |
250 | synaptics_rmi4_set_page(pdata, address); | |
251 | goto retry; | |
252 | } | |
253 | } | |
254 | exit: | |
255 | mutex_unlock(&(pdata->rmi4_page_mutex)); | |
256 | return retval; | |
257 | } | |
258 | ||
259 | /** | |
260 | * synaptics_rmi4_i2c_byte_write() - write the single byte data | |
261 | * @pdata: pointer to synaptics_rmi4_data structure | |
262 | * @address: write the block of data from this offset | |
263 | * @data: data to be write | |
264 | * | |
265 | * This function is to write the single byte data and returns integer. | |
266 | */ | |
267 | static int synaptics_rmi4_i2c_byte_write(struct synaptics_rmi4_data *pdata, | |
268 | unsigned short address, | |
269 | unsigned char data) | |
270 | { | |
271 | unsigned char txbuf[2]; | |
272 | int retval = 0; | |
273 | struct i2c_client *i2c = pdata->i2c_client; | |
274 | ||
275 | /* Can't have anyone else changing the page behind our backs */ | |
276 | mutex_lock(&(pdata->rmi4_page_mutex)); | |
277 | ||
278 | retval = synaptics_rmi4_set_page(pdata, address); | |
279 | if (retval != PAGE_LEN) | |
280 | goto exit; | |
281 | txbuf[0] = address & MASK_8BIT; | |
282 | txbuf[1] = data; | |
283 | retval = i2c_master_send(pdata->i2c_client, txbuf, 2); | |
25985edc | 284 | /* Add in retry on writes only in certain error return values */ |
eba499d3 NKG |
285 | if (retval != 2) { |
286 | dev_err(&i2c->dev, "%s:failed:%d\n", __func__, retval); | |
287 | retval = -EIO; | |
288 | } else | |
289 | retval = 1; | |
290 | exit: | |
291 | mutex_unlock(&(pdata->rmi4_page_mutex)); | |
292 | return retval; | |
293 | } | |
294 | ||
295 | /** | |
296 | * synpatics_rmi4_touchpad_report() - reports for the rmi4 touchpad device | |
297 | * @pdata: pointer to synaptics_rmi4_data structure | |
298 | * @rfi: pointer to synaptics_rmi4_fn structure | |
299 | * | |
300 | * This function calls to reports for the rmi4 touchpad device | |
301 | */ | |
302 | static int synpatics_rmi4_touchpad_report(struct synaptics_rmi4_data *pdata, | |
303 | struct synaptics_rmi4_fn *rfi) | |
304 | { | |
305 | /* number of touch points - fingers down in this case */ | |
306 | int touch_count = 0; | |
307 | int finger; | |
eba499d3 NKG |
308 | int finger_registers; |
309 | int reg; | |
310 | int finger_shift; | |
311 | int finger_status; | |
312 | int retval; | |
a13ea24e AC |
313 | int x, y; |
314 | int wx, wy; | |
eba499d3 NKG |
315 | unsigned short data_base_addr; |
316 | unsigned short data_offset; | |
317 | unsigned char data_reg_blk_size; | |
318 | unsigned char values[2]; | |
319 | unsigned char data[DATA_LEN]; | |
a13ea24e | 320 | unsigned char fingers_supported = pdata->fingers_supported; |
eba499d3 | 321 | struct i2c_client *client = pdata->i2c_client; |
a13ea24e | 322 | struct input_dev *input_dev = pdata->input_dev; |
eba499d3 NKG |
323 | |
324 | /* get 2D sensor finger data */ | |
325 | /* | |
326 | * First get the finger status field - the size of the finger status | |
327 | * field is determined by the number of finger supporte - 2 bits per | |
328 | * finger, so the number of registers to read is: | |
329 | * registerCount = ceil(numberOfFingers/4). | |
330 | * Read the required number of registers and check each 2 bit field to | |
331 | * determine if a finger is down: | |
332 | * 00 = finger not present, | |
333 | * 01 = finger present and data accurate, | |
334 | * 10 = finger present but data may not be accurate, | |
335 | * 11 = reserved for product use. | |
336 | */ | |
eba499d3 NKG |
337 | finger_registers = (fingers_supported + 3)/4; |
338 | data_base_addr = rfi->fn_desc.data_base_addr; | |
339 | retval = synaptics_rmi4_i2c_block_read(pdata, data_base_addr, values, | |
340 | finger_registers); | |
341 | if (retval != finger_registers) { | |
342 | dev_err(&client->dev, "%s:read status registers failed\n", | |
343 | __func__); | |
344 | return 0; | |
345 | } | |
346 | /* | |
347 | * For each finger present, read the proper number of registers | |
348 | * to get absolute data. | |
349 | */ | |
350 | data_reg_blk_size = rfi->size_of_data_register_block; | |
351 | for (finger = 0; finger < fingers_supported; finger++) { | |
352 | /* determine which data byte the finger status is in */ | |
353 | reg = finger/4; | |
354 | /* bit shift to get finger's status */ | |
355 | finger_shift = (finger % 4) * 2; | |
356 | finger_status = (values[reg] >> finger_shift) & 3; | |
357 | /* | |
358 | * if finger status indicates a finger is present then | |
359 | * read the finger data and report it | |
360 | */ | |
a13ea24e AC |
361 | input_mt_slot(input_dev, finger); |
362 | input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, | |
363 | finger_status != 0); | |
364 | ||
365 | if (finger_status) { | |
eba499d3 NKG |
366 | /* Read the finger data */ |
367 | data_offset = data_base_addr + | |
368 | ((finger * data_reg_blk_size) + | |
369 | finger_registers); | |
370 | retval = synaptics_rmi4_i2c_block_read(pdata, | |
371 | data_offset, data, | |
372 | data_reg_blk_size); | |
373 | if (retval != data_reg_blk_size) { | |
a13ea24e | 374 | dev_err(&client->dev, "%s:read data failed\n", |
eba499d3 NKG |
375 | __func__); |
376 | return 0; | |
eba499d3 | 377 | } |
a13ea24e AC |
378 | x = (data[0] << 4) | (data[2] & MASK_4BIT); |
379 | y = (data[1] << 4) | ((data[2] >> 4) & MASK_4BIT); | |
380 | wy = (data[3] >> 4) & MASK_4BIT; | |
381 | wx = (data[3] & MASK_4BIT); | |
382 | ||
383 | if (pdata->board->x_flip) | |
384 | x = pdata->sensor_max_x - x; | |
385 | if (pdata->board->y_flip) | |
386 | y = pdata->sensor_max_y - y; | |
387 | ||
388 | input_report_abs(input_dev, ABS_MT_TOUCH_MAJOR, | |
389 | max(wx, wy)); | |
390 | input_report_abs(input_dev, ABS_MT_POSITION_X, x); | |
391 | input_report_abs(input_dev, ABS_MT_POSITION_Y, y); | |
392 | ||
eba499d3 NKG |
393 | /* number of active touch points */ |
394 | touch_count++; | |
395 | } | |
396 | } | |
397 | ||
eba499d3 | 398 | /* sync after groups of events */ |
a13ea24e AC |
399 | input_mt_sync_frame(input_dev); |
400 | input_sync(input_dev); | |
eba499d3 NKG |
401 | /* return the number of touch points */ |
402 | return touch_count; | |
403 | } | |
404 | ||
405 | /** | |
406 | * synaptics_rmi4_report_device() - reports the rmi4 device | |
407 | * @pdata: pointer to synaptics_rmi4_data structure | |
408 | * @rfi: pointer to synaptics_rmi4_fn | |
409 | * | |
410 | * This function is used to call the report function of the rmi4 device. | |
411 | */ | |
412 | static int synaptics_rmi4_report_device(struct synaptics_rmi4_data *pdata, | |
413 | struct synaptics_rmi4_fn *rfi) | |
414 | { | |
415 | int touch = 0; | |
416 | struct i2c_client *client = pdata->i2c_client; | |
417 | static int num_error_reports; | |
418 | if (rfi->fn_number != SYNAPTICS_RMI4_TOUCHPAD_FUNC_NUM) { | |
419 | num_error_reports++; | |
420 | if (num_error_reports < MAX_ERROR_REPORT) | |
421 | dev_err(&client->dev, "%s:report not supported\n", | |
422 | __func__); | |
423 | } else | |
424 | touch = synpatics_rmi4_touchpad_report(pdata, rfi); | |
425 | return touch; | |
426 | } | |
427 | /** | |
428 | * synaptics_rmi4_sensor_report() - reports to input subsystem | |
429 | * @pdata: pointer to synaptics_rmi4_data structure | |
430 | * | |
431 | * This function is used to reads in all data sources and reports | |
432 | * them to the input subsystem. | |
433 | */ | |
434 | static int synaptics_rmi4_sensor_report(struct synaptics_rmi4_data *pdata) | |
435 | { | |
436 | unsigned char intr_status[4]; | |
437 | /* number of touch points - fingers or buttons */ | |
438 | int touch = 0; | |
439 | unsigned int retval; | |
440 | struct synaptics_rmi4_fn *rfi; | |
441 | struct synaptics_rmi4_device_info *rmi; | |
442 | struct i2c_client *client = pdata->i2c_client; | |
443 | ||
444 | /* | |
445 | * Get the interrupt status from the function $01 | |
446 | * control register+1 to find which source(s) were interrupting | |
447 | * so we can read the data from the source(s) (2D sensor, buttons..) | |
448 | */ | |
449 | retval = synaptics_rmi4_i2c_block_read(pdata, | |
450 | pdata->fn01_data_base_addr + 1, | |
451 | intr_status, | |
452 | pdata->number_of_interrupt_register); | |
453 | if (retval != pdata->number_of_interrupt_register) { | |
454 | dev_err(&client->dev, | |
455 | "could not read interrupt status registers\n"); | |
456 | return 0; | |
457 | } | |
458 | /* | |
459 | * check each function that has data sources and if the interrupt for | |
460 | * that triggered then call that RMI4 functions report() function to | |
461 | * gather data and report it to the input subsystem | |
462 | */ | |
463 | rmi = &(pdata->rmi4_mod_info); | |
464 | list_for_each_entry(rfi, &rmi->support_fn_list, link) { | |
465 | if (rfi->num_of_data_sources) { | |
466 | if (intr_status[rfi->index_to_intr_reg] & | |
467 | rfi->intr_mask) | |
468 | touch = synaptics_rmi4_report_device(pdata, | |
469 | rfi); | |
470 | } | |
471 | } | |
472 | /* return the number of touch points */ | |
473 | return touch; | |
474 | } | |
475 | ||
476 | /** | |
477 | * synaptics_rmi4_irq() - thread function for rmi4 attention line | |
478 | * @irq: irq value | |
479 | * @data: void pointer | |
480 | * | |
481 | * This function is interrupt thread function. It just notifies the | |
482 | * application layer that attention is required. | |
483 | */ | |
484 | static irqreturn_t synaptics_rmi4_irq(int irq, void *data) | |
485 | { | |
486 | struct synaptics_rmi4_data *pdata = data; | |
487 | int touch_count; | |
488 | do { | |
489 | touch_count = synaptics_rmi4_sensor_report(pdata); | |
490 | if (touch_count) | |
491 | wait_event_timeout(pdata->wait, pdata->touch_stopped, | |
492 | msecs_to_jiffies(1)); | |
493 | else | |
494 | break; | |
495 | } while (!pdata->touch_stopped); | |
496 | return IRQ_HANDLED; | |
497 | } | |
498 | ||
499 | /** | |
500 | * synpatics_rmi4_touchpad_detect() - detects the rmi4 touchpad device | |
501 | * @pdata: pointer to synaptics_rmi4_data structure | |
502 | * @rfi: pointer to synaptics_rmi4_fn structure | |
503 | * @fd: pointer to synaptics_rmi4_fn_desc structure | |
504 | * @interruptcount: count the number of interrupts | |
505 | * | |
506 | * This function calls to detects the rmi4 touchpad device | |
507 | */ | |
508 | static int synpatics_rmi4_touchpad_detect(struct synaptics_rmi4_data *pdata, | |
509 | struct synaptics_rmi4_fn *rfi, | |
510 | struct synaptics_rmi4_fn_desc *fd, | |
511 | unsigned int interruptcount) | |
512 | { | |
513 | unsigned char queries[QUERY_LEN]; | |
514 | unsigned short intr_offset; | |
515 | unsigned char abs_data_size; | |
516 | unsigned char abs_data_blk_size; | |
517 | unsigned char egr_0, egr_1; | |
518 | unsigned int all_data_blk_size; | |
519 | int has_pinch, has_flick, has_tap; | |
520 | int has_tapandhold, has_doubletap; | |
521 | int has_earlytap, has_press; | |
522 | int has_palmdetect, has_rotate; | |
523 | int has_rel; | |
524 | int i; | |
525 | int retval; | |
526 | struct i2c_client *client = pdata->i2c_client; | |
527 | ||
528 | rfi->fn_desc.query_base_addr = fd->query_base_addr; | |
529 | rfi->fn_desc.data_base_addr = fd->data_base_addr; | |
530 | rfi->fn_desc.intr_src_count = fd->intr_src_count; | |
531 | rfi->fn_desc.fn_number = fd->fn_number; | |
532 | rfi->fn_number = fd->fn_number; | |
533 | rfi->num_of_data_sources = fd->intr_src_count; | |
534 | rfi->fn_desc.ctrl_base_addr = fd->ctrl_base_addr; | |
535 | rfi->fn_desc.cmd_base_addr = fd->cmd_base_addr; | |
536 | ||
537 | /* | |
538 | * need to get number of fingers supported, data size, etc. | |
539 | * to be used when getting data since the number of registers to | |
540 | * read depends on the number of fingers supported and data size. | |
541 | */ | |
542 | retval = synaptics_rmi4_i2c_block_read(pdata, fd->query_base_addr, | |
543 | queries, | |
544 | sizeof(queries)); | |
545 | if (retval != sizeof(queries)) { | |
546 | dev_err(&client->dev, "%s:read function query registers\n", | |
547 | __func__); | |
548 | return retval; | |
549 | } | |
550 | /* | |
551 | * 2D data sources have only 3 bits for the number of fingers | |
25985edc | 552 | * supported - so the encoding is a bit weird. |
eba499d3 NKG |
553 | */ |
554 | if ((queries[1] & MASK_3BIT) <= 4) | |
555 | /* add 1 since zero based */ | |
556 | rfi->num_of_data_points = (queries[1] & MASK_3BIT) + 1; | |
557 | else { | |
558 | /* | |
559 | * a value of 5 is up to 10 fingers - 6 and 7 are reserved | |
560 | * (shouldn't get these i int retval;n a normal 2D source). | |
561 | */ | |
562 | if ((queries[1] & MASK_3BIT) == 5) | |
563 | rfi->num_of_data_points = 10; | |
564 | } | |
a13ea24e | 565 | pdata->fingers_supported = rfi->num_of_data_points; |
eba499d3 NKG |
566 | /* Need to get interrupt info for handling interrupts */ |
567 | rfi->index_to_intr_reg = (interruptcount + 7)/8; | |
568 | if (rfi->index_to_intr_reg != 0) | |
569 | rfi->index_to_intr_reg -= 1; | |
570 | /* | |
571 | * loop through interrupts for each source in fn $11 | |
572 | * and or in a bit to the interrupt mask for each. | |
573 | */ | |
574 | intr_offset = interruptcount % 8; | |
575 | rfi->intr_mask = 0; | |
576 | for (i = intr_offset; | |
577 | i < ((fd->intr_src_count & MASK_3BIT) + intr_offset); i++) | |
578 | rfi->intr_mask |= 1 << i; | |
579 | ||
580 | /* Size of just the absolute data for one finger */ | |
581 | abs_data_size = queries[5] & MASK_2BIT; | |
582 | /* One each for X and Y, one for LSB for X & Y, one for W, one for Z */ | |
583 | abs_data_blk_size = 3 + (2 * (abs_data_size == 0 ? 1 : 0)); | |
584 | rfi->size_of_data_register_block = abs_data_blk_size; | |
585 | ||
586 | /* | |
587 | * need to determine the size of data to read - this depends on | |
588 | * conditions such as whether Relative data is reported and if Gesture | |
589 | * data is reported. | |
590 | */ | |
591 | egr_0 = queries[7]; | |
592 | egr_1 = queries[8]; | |
593 | ||
594 | /* | |
595 | * Get info about what EGR data is supported, whether it has | |
596 | * Relative data supported, etc. | |
597 | */ | |
598 | has_pinch = egr_0 & HAS_PINCH; | |
599 | has_flick = egr_0 & HAS_FLICK; | |
600 | has_tap = egr_0 & HAS_TAP; | |
601 | has_earlytap = egr_0 & HAS_EARLYTAP; | |
602 | has_press = egr_0 & HAS_PRESS; | |
603 | has_rotate = egr_1 & HAS_ROTATE; | |
604 | has_rel = queries[1] & HAS_RELEASE; | |
605 | has_tapandhold = egr_0 & HAS_TAPANDHOLD; | |
606 | has_doubletap = egr_0 & HAS_DOUBLETAP; | |
607 | has_palmdetect = egr_1 & HAS_PALMDETECT; | |
608 | ||
609 | /* | |
610 | * Size of all data including finger status, absolute data for each | |
611 | * finger, relative data and EGR data | |
612 | */ | |
613 | all_data_blk_size = | |
614 | /* finger status, four fingers per register */ | |
615 | ((rfi->num_of_data_points + 3) / 4) + | |
616 | /* absolute data, per finger times number of fingers */ | |
617 | (abs_data_blk_size * rfi->num_of_data_points) + | |
618 | /* | |
619 | * two relative registers (if relative is being reported) | |
620 | */ | |
621 | 2 * has_rel + | |
622 | /* | |
623 | * F11_2D_data8 is only present if the egr_0 | |
624 | * register is non-zero. | |
625 | */ | |
626 | !!(egr_0) + | |
627 | /* | |
628 | * F11_2D_data9 is only present if either egr_0 or | |
629 | * egr_1 registers are non-zero. | |
630 | */ | |
631 | (egr_0 || egr_1) + | |
632 | /* | |
633 | * F11_2D_data10 is only present if EGR_PINCH or EGR_FLICK of | |
634 | * egr_0 reports as 1. | |
635 | */ | |
636 | !!(has_pinch | has_flick) + | |
637 | /* | |
638 | * F11_2D_data11 and F11_2D_data12 are only present if | |
639 | * EGR_FLICK of egr_0 reports as 1. | |
640 | */ | |
641 | 2 * !!(has_flick); | |
642 | return retval; | |
643 | } | |
644 | ||
645 | /** | |
d761074b | 646 | * synaptics_rmi4_touchpad_config() - configures the rmi4 touchpad device |
eba499d3 NKG |
647 | * @pdata: pointer to synaptics_rmi4_data structure |
648 | * @rfi: pointer to synaptics_rmi4_fn structure | |
649 | * | |
d761074b | 650 | * This function calls to configures the rmi4 touchpad device |
eba499d3 | 651 | */ |
7d7d34a1 | 652 | static int synaptics_rmi4_touchpad_config(struct synaptics_rmi4_data *pdata, |
eba499d3 NKG |
653 | struct synaptics_rmi4_fn *rfi) |
654 | { | |
655 | /* | |
656 | * For the data source - print info and do any | |
657 | * source specific configuration. | |
658 | */ | |
659 | unsigned char data[BUF_LEN]; | |
660 | int retval = 0; | |
661 | struct i2c_client *client = pdata->i2c_client; | |
662 | ||
663 | /* Get and print some info about the data source... */ | |
664 | /* To Query 2D devices we need to read from the address obtained | |
665 | * from the function descriptor stored in the RMI function info. | |
666 | */ | |
667 | retval = synaptics_rmi4_i2c_block_read(pdata, | |
668 | rfi->fn_desc.query_base_addr, | |
669 | data, QUERY_LEN); | |
670 | if (retval != QUERY_LEN) | |
671 | dev_err(&client->dev, "%s:read query registers failed\n", | |
672 | __func__); | |
673 | else { | |
674 | retval = synaptics_rmi4_i2c_block_read(pdata, | |
675 | rfi->fn_desc.ctrl_base_addr, | |
676 | data, DATA_BUF_LEN); | |
677 | if (retval != DATA_BUF_LEN) { | |
678 | dev_err(&client->dev, | |
679 | "%s:read control registers failed\n", | |
680 | __func__); | |
681 | return retval; | |
682 | } | |
683 | /* Store these for use later*/ | |
684 | pdata->sensor_max_x = ((data[6] & MASK_8BIT) << 0) | | |
685 | ((data[7] & MASK_4BIT) << 8); | |
686 | pdata->sensor_max_y = ((data[8] & MASK_5BIT) << 0) | | |
687 | ((data[9] & MASK_4BIT) << 8); | |
688 | } | |
689 | return retval; | |
690 | } | |
691 | ||
692 | /** | |
693 | * synaptics_rmi4_i2c_query_device() - query the rmi4 device | |
694 | * @pdata: pointer to synaptics_rmi4_data structure | |
695 | * | |
696 | * This function is used to query the rmi4 device. | |
697 | */ | |
698 | static int synaptics_rmi4_i2c_query_device(struct synaptics_rmi4_data *pdata) | |
699 | { | |
700 | int i; | |
701 | int retval; | |
702 | unsigned char std_queries[STD_QUERY_LEN]; | |
703 | unsigned char intr_count = 0; | |
704 | int data_sources = 0; | |
705 | unsigned int ctrl_offset; | |
706 | struct synaptics_rmi4_fn *rfi; | |
707 | struct synaptics_rmi4_fn_desc rmi_fd; | |
708 | struct synaptics_rmi4_device_info *rmi; | |
709 | struct i2c_client *client = pdata->i2c_client; | |
710 | ||
711 | /* | |
712 | * init the physical drivers RMI module | |
713 | * info list of functions | |
714 | */ | |
715 | INIT_LIST_HEAD(&pdata->rmi4_mod_info.support_fn_list); | |
716 | ||
717 | /* | |
718 | * Read the Page Descriptor Table to determine what functions | |
719 | * are present | |
720 | */ | |
721 | for (i = PDT_START_SCAN_LOCATION; i > PDT_END_SCAN_LOCATION; | |
722 | i -= PDT_ENTRY_SIZE) { | |
723 | retval = synaptics_rmi4_i2c_block_read(pdata, i, | |
724 | (unsigned char *)&rmi_fd, | |
725 | sizeof(rmi_fd)); | |
726 | if (retval != sizeof(rmi_fd)) { | |
727 | /* failed to read next PDT entry */ | |
728 | dev_err(&client->dev, "%s: read error\n", __func__); | |
729 | return -EIO; | |
730 | } | |
731 | rfi = NULL; | |
732 | if (rmi_fd.fn_number) { | |
733 | switch (rmi_fd.fn_number & MASK_8BIT) { | |
734 | case SYNAPTICS_RMI4_DEVICE_CONTROL_FUNC_NUM: | |
735 | pdata->fn01_query_base_addr = | |
736 | rmi_fd.query_base_addr; | |
737 | pdata->fn01_ctrl_base_addr = | |
738 | rmi_fd.ctrl_base_addr; | |
739 | pdata->fn01_data_base_addr = | |
740 | rmi_fd.data_base_addr; | |
741 | break; | |
742 | case SYNAPTICS_RMI4_TOUCHPAD_FUNC_NUM: | |
743 | if (rmi_fd.intr_src_count) { | |
744 | rfi = kmalloc(sizeof(*rfi), | |
78110bb8 JP |
745 | GFP_KERNEL); |
746 | if (!rfi) | |
747 | return -ENOMEM; | |
eba499d3 NKG |
748 | retval = synpatics_rmi4_touchpad_detect |
749 | (pdata, rfi, | |
750 | &rmi_fd, | |
751 | intr_count); | |
819d4eb1 AB |
752 | if (retval < 0) { |
753 | kfree(rfi); | |
eba499d3 | 754 | return retval; |
819d4eb1 | 755 | } |
eba499d3 NKG |
756 | } |
757 | break; | |
758 | } | |
759 | /* interrupt count for next iteration */ | |
760 | intr_count += (rmi_fd.intr_src_count & MASK_3BIT); | |
761 | /* | |
762 | * We only want to add functions to the list | |
763 | * that have data associated with them. | |
764 | */ | |
765 | if (rfi && rmi_fd.intr_src_count) { | |
766 | /* link this function info to the RMI module */ | |
767 | mutex_lock(&(pdata->fn_list_mutex)); | |
768 | list_add_tail(&rfi->link, | |
769 | &pdata->rmi4_mod_info.support_fn_list); | |
770 | mutex_unlock(&(pdata->fn_list_mutex)); | |
771 | } | |
772 | } else { | |
773 | /* | |
774 | * A zero in the function number | |
775 | * signals the end of the PDT | |
776 | */ | |
777 | dev_dbg(&client->dev, | |
778 | "%s:end of PDT\n", __func__); | |
779 | break; | |
780 | } | |
781 | } | |
782 | /* | |
783 | * calculate the interrupt register count - used in the | |
784 | * ISR to read the correct number of interrupt registers | |
785 | */ | |
786 | pdata->number_of_interrupt_register = (intr_count + 7) / 8; | |
787 | /* | |
788 | * Function $01 will be used to query the product properties, | |
789 | * and product ID so we had to read the PDT above first to get | |
790 | * the Fn $01 query address and prior to filling in the product | |
791 | * info. NOTE: Even an unflashed device will still have FN $01. | |
792 | */ | |
793 | ||
794 | /* Load up the standard queries and get the RMI4 module info */ | |
795 | retval = synaptics_rmi4_i2c_block_read(pdata, | |
796 | pdata->fn01_query_base_addr, | |
797 | std_queries, | |
798 | sizeof(std_queries)); | |
799 | if (retval != sizeof(std_queries)) { | |
800 | dev_err(&client->dev, "%s:Failed reading queries\n", | |
801 | __func__); | |
802 | return -EIO; | |
803 | } | |
804 | ||
805 | /* Currently supported RMI version is 4.0 */ | |
806 | pdata->rmi4_mod_info.version_major = 4; | |
807 | pdata->rmi4_mod_info.version_minor = 0; | |
808 | /* | |
809 | * get manufacturer id, product_props, product info, | |
810 | * date code, tester id, serial num and product id (name) | |
811 | */ | |
812 | pdata->rmi4_mod_info.manufacturer_id = std_queries[0]; | |
813 | pdata->rmi4_mod_info.product_props = std_queries[1]; | |
814 | pdata->rmi4_mod_info.product_info[0] = std_queries[2]; | |
815 | pdata->rmi4_mod_info.product_info[1] = std_queries[3]; | |
816 | /* year - 2001-2032 */ | |
817 | pdata->rmi4_mod_info.date_code[0] = std_queries[4] & MASK_5BIT; | |
818 | /* month - 1-12 */ | |
819 | pdata->rmi4_mod_info.date_code[1] = std_queries[5] & MASK_4BIT; | |
820 | /* day - 1-31 */ | |
821 | pdata->rmi4_mod_info.date_code[2] = std_queries[6] & MASK_5BIT; | |
822 | pdata->rmi4_mod_info.tester_id = ((std_queries[7] & MASK_7BIT) << 8) | | |
823 | (std_queries[8] & MASK_7BIT); | |
824 | pdata->rmi4_mod_info.serial_number = | |
825 | ((std_queries[9] & MASK_7BIT) << 8) | | |
826 | (std_queries[10] & MASK_7BIT); | |
827 | memcpy(pdata->rmi4_mod_info.product_id_string, &std_queries[11], 10); | |
828 | ||
829 | /* Check if this is a Synaptics device - report if not. */ | |
830 | if (pdata->rmi4_mod_info.manufacturer_id != 1) | |
831 | dev_err(&client->dev, "%s: non-Synaptics mfg id:%d\n", | |
832 | __func__, pdata->rmi4_mod_info.manufacturer_id); | |
833 | ||
834 | list_for_each_entry(rfi, &pdata->rmi4_mod_info.support_fn_list, link) | |
835 | data_sources += rfi->num_of_data_sources; | |
836 | if (data_sources) { | |
837 | rmi = &(pdata->rmi4_mod_info); | |
838 | list_for_each_entry(rfi, &rmi->support_fn_list, link) { | |
839 | if (rfi->num_of_data_sources) { | |
840 | if (rfi->fn_number == | |
841 | SYNAPTICS_RMI4_TOUCHPAD_FUNC_NUM) { | |
d761074b | 842 | retval = synaptics_rmi4_touchpad_config |
eba499d3 NKG |
843 | (pdata, rfi); |
844 | if (retval < 0) | |
845 | return retval; | |
846 | } else | |
847 | dev_err(&client->dev, | |
848 | "%s:fn_number not supported\n", | |
849 | __func__); | |
850 | /* | |
851 | * Turn on interrupts for this | |
852 | * function's data sources. | |
853 | */ | |
854 | ctrl_offset = pdata->fn01_ctrl_base_addr + 1 + | |
855 | rfi->index_to_intr_reg; | |
856 | retval = synaptics_rmi4_i2c_byte_write(pdata, | |
857 | ctrl_offset, | |
858 | rfi->intr_mask); | |
859 | if (retval < 0) | |
860 | return retval; | |
861 | } | |
862 | } | |
863 | } | |
864 | return 0; | |
865 | } | |
866 | ||
867 | /** | |
868 | * synaptics_rmi4_probe() - Initialze the i2c-client touchscreen driver | |
869 | * @i2c: i2c client structure pointer | |
870 | * @id:i2c device id pointer | |
871 | * | |
872 | * This function will allocate and initialize the instance | |
873 | * data and request the irq and set the instance data as the clients | |
874 | * platform data then register the physical driver which will do a scan of | |
875 | * the rmi4 Physical Device Table and enumerate any rmi4 functions that | |
876 | * have data sources associated with them. | |
877 | */ | |
8cd3a48f | 878 | static int synaptics_rmi4_probe |
eba499d3 NKG |
879 | (struct i2c_client *client, const struct i2c_device_id *dev_id) |
880 | { | |
881 | int retval; | |
882 | unsigned char intr_status[4]; | |
883 | struct synaptics_rmi4_data *rmi4_data; | |
884 | const struct synaptics_rmi4_platform_data *platformdata = | |
885 | client->dev.platform_data; | |
886 | ||
887 | if (!i2c_check_functionality(client->adapter, | |
888 | I2C_FUNC_SMBUS_BYTE_DATA)) { | |
889 | dev_err(&client->dev, "i2c smbus byte data not supported\n"); | |
890 | return -EIO; | |
891 | } | |
892 | ||
893 | if (!platformdata) { | |
894 | dev_err(&client->dev, "%s: no platform data\n", __func__); | |
895 | return -EINVAL; | |
896 | } | |
897 | ||
898 | /* Allocate and initialize the instance data for this client */ | |
78110bb8 JP |
899 | rmi4_data = kcalloc(2, sizeof(struct synaptics_rmi4_data), |
900 | GFP_KERNEL); | |
901 | if (!rmi4_data) | |
eba499d3 | 902 | return -ENOMEM; |
eba499d3 NKG |
903 | |
904 | rmi4_data->input_dev = input_allocate_device(); | |
905 | if (rmi4_data->input_dev == NULL) { | |
906 | dev_err(&client->dev, "%s:input device alloc failed\n", | |
907 | __func__); | |
908 | retval = -ENOMEM; | |
909 | goto err_input; | |
910 | } | |
911 | ||
7a176332 NKG |
912 | rmi4_data->regulator = regulator_get(&client->dev, "vdd"); |
913 | if (IS_ERR(rmi4_data->regulator)) { | |
914 | dev_err(&client->dev, "%s:get regulator failed\n", | |
915 | __func__); | |
916 | retval = PTR_ERR(rmi4_data->regulator); | |
917 | goto err_get_regulator; | |
918 | } | |
919 | retval = regulator_enable(rmi4_data->regulator); | |
920 | if (retval < 0) { | |
921 | dev_err(&client->dev, "%s:regulator enable failed\n", | |
922 | __func__); | |
923 | goto err_regulator_enable; | |
eba499d3 | 924 | } |
eba499d3 NKG |
925 | init_waitqueue_head(&rmi4_data->wait); |
926 | /* | |
927 | * Copy i2c_client pointer into RTID's i2c_client pointer for | |
928 | * later use in rmi4_read, rmi4_write, etc. | |
929 | */ | |
930 | rmi4_data->i2c_client = client; | |
931 | /* So we set the page correctly the first time */ | |
932 | rmi4_data->current_page = MASK_16BIT; | |
933 | rmi4_data->board = platformdata; | |
934 | rmi4_data->touch_stopped = false; | |
935 | ||
936 | /* init the mutexes for maintain the lists */ | |
937 | mutex_init(&(rmi4_data->fn_list_mutex)); | |
938 | mutex_init(&(rmi4_data->rmi4_page_mutex)); | |
939 | ||
940 | /* | |
941 | * Register physical driver - this will call the detect function that | |
942 | * will then scan the device and determine the supported | |
943 | * rmi4 functions. | |
944 | */ | |
945 | retval = synaptics_rmi4_i2c_query_device(rmi4_data); | |
946 | if (retval) { | |
947 | dev_err(&client->dev, "%s: rmi4 query device failed\n", | |
948 | __func__); | |
949 | goto err_query_dev; | |
950 | } | |
951 | ||
952 | /* Store the instance data in the i2c_client */ | |
953 | i2c_set_clientdata(client, rmi4_data); | |
954 | ||
955 | /*initialize the input device parameters */ | |
956 | rmi4_data->input_dev->name = DRIVER_NAME; | |
957 | rmi4_data->input_dev->phys = "Synaptics_Clearpad"; | |
958 | rmi4_data->input_dev->id.bustype = BUS_I2C; | |
959 | rmi4_data->input_dev->dev.parent = &client->dev; | |
960 | input_set_drvdata(rmi4_data->input_dev, rmi4_data); | |
961 | ||
962 | /* Initialize the function handlers for rmi4 */ | |
963 | set_bit(EV_SYN, rmi4_data->input_dev->evbit); | |
964 | set_bit(EV_KEY, rmi4_data->input_dev->evbit); | |
965 | set_bit(EV_ABS, rmi4_data->input_dev->evbit); | |
966 | ||
967 | input_set_abs_params(rmi4_data->input_dev, ABS_MT_POSITION_X, 0, | |
968 | rmi4_data->sensor_max_x, 0, 0); | |
969 | input_set_abs_params(rmi4_data->input_dev, ABS_MT_POSITION_Y, 0, | |
970 | rmi4_data->sensor_max_y, 0, 0); | |
971 | input_set_abs_params(rmi4_data->input_dev, ABS_MT_TOUCH_MAJOR, 0, | |
972 | MAX_TOUCH_MAJOR, 0, 0); | |
a13ea24e AC |
973 | input_mt_init_slots(rmi4_data->input_dev, |
974 | rmi4_data->fingers_supported, 0); | |
eba499d3 | 975 | |
eba499d3 NKG |
976 | /* Clear interrupts */ |
977 | synaptics_rmi4_i2c_block_read(rmi4_data, | |
978 | rmi4_data->fn01_data_base_addr + 1, intr_status, | |
979 | rmi4_data->number_of_interrupt_register); | |
980 | retval = request_threaded_irq(platformdata->irq_number, NULL, | |
981 | synaptics_rmi4_irq, | |
982 | platformdata->irq_type, | |
4ac638b2 | 983 | DRIVER_NAME, rmi4_data); |
eba499d3 NKG |
984 | if (retval) { |
985 | dev_err(&client->dev, "%s:Unable to get attn irq %d\n", | |
986 | __func__, platformdata->irq_number); | |
949c3676 | 987 | goto err_query_dev; |
f32b8453 DC |
988 | } |
989 | ||
990 | retval = input_register_device(rmi4_data->input_dev); | |
991 | if (retval) { | |
992 | dev_err(&client->dev, "%s:input register failed\n", __func__); | |
993 | goto err_free_irq; | |
eba499d3 NKG |
994 | } |
995 | ||
996 | return retval; | |
997 | ||
f32b8453 | 998 | err_free_irq: |
eba499d3 | 999 | free_irq(platformdata->irq_number, rmi4_data); |
eba499d3 | 1000 | err_query_dev: |
7a176332 NKG |
1001 | regulator_disable(rmi4_data->regulator); |
1002 | err_regulator_enable: | |
1003 | regulator_put(rmi4_data->regulator); | |
1004 | err_get_regulator: | |
eba499d3 NKG |
1005 | input_free_device(rmi4_data->input_dev); |
1006 | rmi4_data->input_dev = NULL; | |
1007 | err_input: | |
1008 | kfree(rmi4_data); | |
1009 | ||
1010 | return retval; | |
1011 | } | |
1012 | /** | |
1013 | * synaptics_rmi4_remove() - Removes the i2c-client touchscreen driver | |
1014 | * @client: i2c client structure pointer | |
1015 | * | |
25985edc | 1016 | * This function uses to remove the i2c-client |
eba499d3 NKG |
1017 | * touchscreen driver and returns integer. |
1018 | */ | |
b18d5dc8 | 1019 | static int synaptics_rmi4_remove(struct i2c_client *client) |
eba499d3 NKG |
1020 | { |
1021 | struct synaptics_rmi4_data *rmi4_data = i2c_get_clientdata(client); | |
1022 | const struct synaptics_rmi4_platform_data *pdata = rmi4_data->board; | |
1023 | ||
1024 | rmi4_data->touch_stopped = true; | |
1025 | wake_up(&rmi4_data->wait); | |
1026 | free_irq(pdata->irq_number, rmi4_data); | |
1027 | input_unregister_device(rmi4_data->input_dev); | |
7a176332 NKG |
1028 | regulator_disable(rmi4_data->regulator); |
1029 | regulator_put(rmi4_data->regulator); | |
eba499d3 NKG |
1030 | kfree(rmi4_data); |
1031 | ||
1032 | return 0; | |
1033 | } | |
1034 | ||
1035 | #ifdef CONFIG_PM | |
1036 | /** | |
1037 | * synaptics_rmi4_suspend() - suspend the touch screen controller | |
1038 | * @dev: pointer to device structure | |
1039 | * | |
25985edc | 1040 | * This function is used to suspend the |
eba499d3 NKG |
1041 | * touch panel controller and returns integer |
1042 | */ | |
1043 | static int synaptics_rmi4_suspend(struct device *dev) | |
1044 | { | |
1045 | /* Touch sleep mode */ | |
1046 | int retval; | |
1047 | unsigned char intr_status; | |
1048 | struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev); | |
1049 | const struct synaptics_rmi4_platform_data *pdata = rmi4_data->board; | |
1050 | ||
1051 | rmi4_data->touch_stopped = true; | |
1052 | disable_irq(pdata->irq_number); | |
1053 | ||
1054 | retval = synaptics_rmi4_i2c_block_read(rmi4_data, | |
1055 | rmi4_data->fn01_data_base_addr + 1, | |
1056 | &intr_status, | |
1057 | rmi4_data->number_of_interrupt_register); | |
1058 | if (retval < 0) | |
1059 | return retval; | |
1060 | ||
1061 | retval = synaptics_rmi4_i2c_byte_write(rmi4_data, | |
1062 | rmi4_data->fn01_ctrl_base_addr + 1, | |
1063 | (intr_status & ~TOUCHPAD_CTRL_INTR)); | |
1064 | if (retval < 0) | |
1065 | return retval; | |
1066 | ||
7a176332 | 1067 | regulator_disable(rmi4_data->regulator); |
eba499d3 NKG |
1068 | |
1069 | return 0; | |
1070 | } | |
1071 | /** | |
1072 | * synaptics_rmi4_resume() - resume the touch screen controller | |
1073 | * @dev: pointer to device structure | |
1074 | * | |
25985edc | 1075 | * This function is used to resume the touch panel |
eba499d3 NKG |
1076 | * controller and returns integer. |
1077 | */ | |
1078 | static int synaptics_rmi4_resume(struct device *dev) | |
1079 | { | |
1080 | int retval; | |
1081 | unsigned char intr_status; | |
1082 | struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev); | |
1083 | const struct synaptics_rmi4_platform_data *pdata = rmi4_data->board; | |
1084 | ||
7a176332 | 1085 | regulator_enable(rmi4_data->regulator); |
eba499d3 NKG |
1086 | |
1087 | enable_irq(pdata->irq_number); | |
1088 | rmi4_data->touch_stopped = false; | |
1089 | ||
1090 | retval = synaptics_rmi4_i2c_block_read(rmi4_data, | |
1091 | rmi4_data->fn01_data_base_addr + 1, | |
1092 | &intr_status, | |
1093 | rmi4_data->number_of_interrupt_register); | |
1094 | if (retval < 0) | |
1095 | return retval; | |
1096 | ||
1097 | retval = synaptics_rmi4_i2c_byte_write(rmi4_data, | |
1098 | rmi4_data->fn01_ctrl_base_addr + 1, | |
1099 | (intr_status | TOUCHPAD_CTRL_INTR)); | |
1100 | if (retval < 0) | |
1101 | return retval; | |
1102 | ||
1103 | return 0; | |
1104 | } | |
1105 | ||
1106 | static const struct dev_pm_ops synaptics_rmi4_dev_pm_ops = { | |
1107 | .suspend = synaptics_rmi4_suspend, | |
1108 | .resume = synaptics_rmi4_resume, | |
1109 | }; | |
1110 | #endif | |
1111 | ||
1112 | static const struct i2c_device_id synaptics_rmi4_id_table[] = { | |
1113 | { DRIVER_NAME, 0 }, | |
1114 | { }, | |
1115 | }; | |
1116 | MODULE_DEVICE_TABLE(i2c, synaptics_rmi4_id_table); | |
1117 | ||
1118 | static struct i2c_driver synaptics_rmi4_driver = { | |
1119 | .driver = { | |
1120 | .name = DRIVER_NAME, | |
1121 | .owner = THIS_MODULE, | |
1122 | #ifdef CONFIG_PM | |
1123 | .pm = &synaptics_rmi4_dev_pm_ops, | |
1124 | #endif | |
1125 | }, | |
1126 | .probe = synaptics_rmi4_probe, | |
3cf36aa9 | 1127 | .remove = synaptics_rmi4_remove, |
eba499d3 NKG |
1128 | .id_table = synaptics_rmi4_id_table, |
1129 | }; | |
eba499d3 | 1130 | |
1055d627 | 1131 | module_i2c_driver(synaptics_rmi4_driver); |
eba499d3 NKG |
1132 | |
1133 | MODULE_LICENSE("GPL v2"); | |
1134 | MODULE_AUTHOR("naveen.gaddipati@stericsson.com, js.ha@stericsson.com"); | |
1135 | MODULE_DESCRIPTION("synaptics rmi4 i2c touch Driver"); | |
1136 | MODULE_ALIAS("i2c:synaptics_rmi4_ts"); |