]>
Commit | Line | Data |
---|---|---|
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> |
eba499d3 NKG |
34 | #include "synaptics_i2c_rmi4.h" |
35 | ||
36 | /* TODO: for multiple device support will need a per-device mutex */ | |
37 | #define DRIVER_NAME "synaptics_rmi4_i2c" | |
38 | ||
39 | #define MAX_ERROR_REPORT 6 | |
40 | #define MAX_TOUCH_MAJOR 15 | |
41 | #define MAX_RETRY_COUNT 5 | |
42 | #define STD_QUERY_LEN 21 | |
43 | #define PAGE_LEN 2 | |
44 | #define DATA_BUF_LEN 32 | |
45 | #define BUF_LEN 37 | |
46 | #define QUERY_LEN 9 | |
47 | #define DATA_LEN 12 | |
48 | #define HAS_TAP 0x01 | |
49 | #define HAS_PALMDETECT 0x01 | |
50 | #define HAS_ROTATE 0x02 | |
51 | #define HAS_TAPANDHOLD 0x02 | |
52 | #define HAS_DOUBLETAP 0x04 | |
53 | #define HAS_EARLYTAP 0x08 | |
54 | #define HAS_RELEASE 0x08 | |
55 | #define HAS_FLICK 0x10 | |
56 | #define HAS_PRESS 0x20 | |
57 | #define HAS_PINCH 0x40 | |
58 | ||
59 | #define MASK_16BIT 0xFFFF | |
60 | #define MASK_8BIT 0xFF | |
61 | #define MASK_7BIT 0x7F | |
62 | #define MASK_5BIT 0x1F | |
63 | #define MASK_4BIT 0x0F | |
64 | #define MASK_3BIT 0x07 | |
65 | #define MASK_2BIT 0x03 | |
66 | #define TOUCHPAD_CTRL_INTR 0x8 | |
67 | #define PDT_START_SCAN_LOCATION (0x00E9) | |
68 | #define PDT_END_SCAN_LOCATION (0x000A) | |
69 | #define PDT_ENTRY_SIZE (0x0006) | |
70 | #define RMI4_NUMBER_OF_MAX_FINGERS (8) | |
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 | |
167 | * | |
168 | * This structure gives the device data information. | |
169 | */ | |
170 | struct synaptics_rmi4_data { | |
171 | struct synaptics_rmi4_device_info rmi4_mod_info; | |
172 | struct input_dev *input_dev; | |
173 | struct i2c_client *i2c_client; | |
174 | const struct synaptics_rmi4_platform_data *board; | |
175 | struct mutex fn_list_mutex; | |
176 | struct mutex rmi4_page_mutex; | |
177 | int current_page; | |
178 | unsigned int number_of_interrupt_register; | |
179 | unsigned short fn01_ctrl_base_addr; | |
180 | unsigned short fn01_query_base_addr; | |
181 | unsigned short fn01_data_base_addr; | |
182 | int sensor_max_x; | |
183 | int sensor_max_y; | |
184 | struct regulator *regulator; | |
185 | wait_queue_head_t wait; | |
186 | bool touch_stopped; | |
187 | }; | |
188 | ||
189 | /** | |
190 | * synaptics_rmi4_set_page() - sets the page | |
191 | * @pdata: pointer to synaptics_rmi4_data structure | |
192 | * @address: set the address of the page | |
193 | * | |
194 | * This function is used to set the page and returns integer. | |
195 | */ | |
196 | static int synaptics_rmi4_set_page(struct synaptics_rmi4_data *pdata, | |
197 | unsigned int address) | |
198 | { | |
199 | unsigned char txbuf[PAGE_LEN]; | |
200 | int retval; | |
201 | unsigned int page; | |
202 | struct i2c_client *i2c = pdata->i2c_client; | |
203 | ||
204 | page = ((address >> 8) & MASK_8BIT); | |
205 | if (page != pdata->current_page) { | |
206 | txbuf[0] = MASK_8BIT; | |
207 | txbuf[1] = page; | |
208 | retval = i2c_master_send(i2c, txbuf, PAGE_LEN); | |
209 | if (retval != PAGE_LEN) | |
210 | dev_err(&i2c->dev, "%s:failed:%d\n", __func__, retval); | |
211 | else | |
212 | pdata->current_page = page; | |
213 | } else | |
214 | retval = PAGE_LEN; | |
215 | return retval; | |
216 | } | |
217 | /** | |
218 | * synaptics_rmi4_i2c_block_read() - read the block of data | |
219 | * @pdata: pointer to synaptics_rmi4_data structure | |
220 | * @address: read the block of data from this offset | |
221 | * @valp: pointer to a buffer containing the data to be read | |
222 | * @size: number of bytes to read | |
223 | * | |
224 | * This function is to read the block of data and returns integer. | |
225 | */ | |
226 | static int synaptics_rmi4_i2c_block_read(struct synaptics_rmi4_data *pdata, | |
227 | unsigned short address, | |
228 | unsigned char *valp, int size) | |
229 | { | |
230 | int retval = 0; | |
231 | int retry_count = 0; | |
232 | int index; | |
233 | struct i2c_client *i2c = pdata->i2c_client; | |
234 | ||
235 | mutex_lock(&(pdata->rmi4_page_mutex)); | |
236 | retval = synaptics_rmi4_set_page(pdata, address); | |
237 | if (retval != PAGE_LEN) | |
238 | goto exit; | |
239 | index = address & MASK_8BIT; | |
240 | retry: | |
241 | retval = i2c_smbus_read_i2c_block_data(i2c, index, size, valp); | |
242 | if (retval != size) { | |
243 | if (++retry_count == MAX_RETRY_COUNT) | |
244 | dev_err(&i2c->dev, | |
245 | "%s:address 0x%04x size %d failed:%d\n", | |
246 | __func__, address, size, retval); | |
247 | else { | |
248 | synaptics_rmi4_set_page(pdata, address); | |
249 | goto retry; | |
250 | } | |
251 | } | |
252 | exit: | |
253 | mutex_unlock(&(pdata->rmi4_page_mutex)); | |
254 | return retval; | |
255 | } | |
256 | ||
257 | /** | |
258 | * synaptics_rmi4_i2c_byte_write() - write the single byte data | |
259 | * @pdata: pointer to synaptics_rmi4_data structure | |
260 | * @address: write the block of data from this offset | |
261 | * @data: data to be write | |
262 | * | |
263 | * This function is to write the single byte data and returns integer. | |
264 | */ | |
265 | static int synaptics_rmi4_i2c_byte_write(struct synaptics_rmi4_data *pdata, | |
266 | unsigned short address, | |
267 | unsigned char data) | |
268 | { | |
269 | unsigned char txbuf[2]; | |
270 | int retval = 0; | |
271 | struct i2c_client *i2c = pdata->i2c_client; | |
272 | ||
273 | /* Can't have anyone else changing the page behind our backs */ | |
274 | mutex_lock(&(pdata->rmi4_page_mutex)); | |
275 | ||
276 | retval = synaptics_rmi4_set_page(pdata, address); | |
277 | if (retval != PAGE_LEN) | |
278 | goto exit; | |
279 | txbuf[0] = address & MASK_8BIT; | |
280 | txbuf[1] = data; | |
281 | retval = i2c_master_send(pdata->i2c_client, txbuf, 2); | |
25985edc | 282 | /* Add in retry on writes only in certain error return values */ |
eba499d3 NKG |
283 | if (retval != 2) { |
284 | dev_err(&i2c->dev, "%s:failed:%d\n", __func__, retval); | |
285 | retval = -EIO; | |
286 | } else | |
287 | retval = 1; | |
288 | exit: | |
289 | mutex_unlock(&(pdata->rmi4_page_mutex)); | |
290 | return retval; | |
291 | } | |
292 | ||
293 | /** | |
294 | * synpatics_rmi4_touchpad_report() - reports for the rmi4 touchpad device | |
295 | * @pdata: pointer to synaptics_rmi4_data structure | |
296 | * @rfi: pointer to synaptics_rmi4_fn structure | |
297 | * | |
298 | * This function calls to reports for the rmi4 touchpad device | |
299 | */ | |
300 | static int synpatics_rmi4_touchpad_report(struct synaptics_rmi4_data *pdata, | |
301 | struct synaptics_rmi4_fn *rfi) | |
302 | { | |
303 | /* number of touch points - fingers down in this case */ | |
304 | int touch_count = 0; | |
305 | int finger; | |
306 | int fingers_supported; | |
307 | int finger_registers; | |
308 | int reg; | |
309 | int finger_shift; | |
310 | int finger_status; | |
311 | int retval; | |
312 | unsigned short data_base_addr; | |
313 | unsigned short data_offset; | |
314 | unsigned char data_reg_blk_size; | |
315 | unsigned char values[2]; | |
316 | unsigned char data[DATA_LEN]; | |
317 | int x[RMI4_NUMBER_OF_MAX_FINGERS]; | |
318 | int y[RMI4_NUMBER_OF_MAX_FINGERS]; | |
319 | int wx[RMI4_NUMBER_OF_MAX_FINGERS]; | |
320 | int wy[RMI4_NUMBER_OF_MAX_FINGERS]; | |
321 | struct i2c_client *client = pdata->i2c_client; | |
322 | ||
323 | /* get 2D sensor finger data */ | |
324 | /* | |
325 | * First get the finger status field - the size of the finger status | |
326 | * field is determined by the number of finger supporte - 2 bits per | |
327 | * finger, so the number of registers to read is: | |
328 | * registerCount = ceil(numberOfFingers/4). | |
329 | * Read the required number of registers and check each 2 bit field to | |
330 | * determine if a finger is down: | |
331 | * 00 = finger not present, | |
332 | * 01 = finger present and data accurate, | |
333 | * 10 = finger present but data may not be accurate, | |
334 | * 11 = reserved for product use. | |
335 | */ | |
336 | fingers_supported = rfi->num_of_data_points; | |
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 | */ | |
361 | if (finger_status == 1 || finger_status == 2) { | |
362 | /* Read the finger data */ | |
363 | data_offset = data_base_addr + | |
364 | ((finger * data_reg_blk_size) + | |
365 | finger_registers); | |
366 | retval = synaptics_rmi4_i2c_block_read(pdata, | |
367 | data_offset, data, | |
368 | data_reg_blk_size); | |
369 | if (retval != data_reg_blk_size) { | |
370 | printk(KERN_ERR "%s:read data failed\n", | |
371 | __func__); | |
372 | return 0; | |
373 | } else { | |
374 | x[touch_count] = | |
375 | (data[0] << 4) | (data[2] & MASK_4BIT); | |
376 | y[touch_count] = | |
377 | (data[1] << 4) | | |
378 | ((data[2] >> 4) & MASK_4BIT); | |
379 | wy[touch_count] = | |
380 | (data[3] >> 4) & MASK_4BIT; | |
381 | wx[touch_count] = | |
382 | (data[3] & MASK_4BIT); | |
383 | ||
384 | if (pdata->board->x_flip) | |
385 | x[touch_count] = | |
386 | pdata->sensor_max_x - | |
387 | x[touch_count]; | |
388 | if (pdata->board->y_flip) | |
389 | y[touch_count] = | |
390 | pdata->sensor_max_y - | |
391 | y[touch_count]; | |
392 | } | |
393 | /* number of active touch points */ | |
394 | touch_count++; | |
395 | } | |
396 | } | |
397 | ||
398 | /* report to input subsystem */ | |
399 | if (touch_count) { | |
400 | for (finger = 0; finger < touch_count; finger++) { | |
401 | input_report_abs(pdata->input_dev, ABS_MT_TOUCH_MAJOR, | |
402 | max(wx[finger] , wy[finger])); | |
403 | input_report_abs(pdata->input_dev, ABS_MT_POSITION_X, | |
404 | x[finger]); | |
405 | input_report_abs(pdata->input_dev, ABS_MT_POSITION_Y, | |
406 | y[finger]); | |
407 | input_mt_sync(pdata->input_dev); | |
408 | } | |
409 | } else | |
410 | input_mt_sync(pdata->input_dev); | |
411 | ||
412 | /* sync after groups of events */ | |
413 | input_sync(pdata->input_dev); | |
414 | /* return the number of touch points */ | |
415 | return touch_count; | |
416 | } | |
417 | ||
418 | /** | |
419 | * synaptics_rmi4_report_device() - reports the rmi4 device | |
420 | * @pdata: pointer to synaptics_rmi4_data structure | |
421 | * @rfi: pointer to synaptics_rmi4_fn | |
422 | * | |
423 | * This function is used to call the report function of the rmi4 device. | |
424 | */ | |
425 | static int synaptics_rmi4_report_device(struct synaptics_rmi4_data *pdata, | |
426 | struct synaptics_rmi4_fn *rfi) | |
427 | { | |
428 | int touch = 0; | |
429 | struct i2c_client *client = pdata->i2c_client; | |
430 | static int num_error_reports; | |
431 | if (rfi->fn_number != SYNAPTICS_RMI4_TOUCHPAD_FUNC_NUM) { | |
432 | num_error_reports++; | |
433 | if (num_error_reports < MAX_ERROR_REPORT) | |
434 | dev_err(&client->dev, "%s:report not supported\n", | |
435 | __func__); | |
436 | } else | |
437 | touch = synpatics_rmi4_touchpad_report(pdata, rfi); | |
438 | return touch; | |
439 | } | |
440 | /** | |
441 | * synaptics_rmi4_sensor_report() - reports to input subsystem | |
442 | * @pdata: pointer to synaptics_rmi4_data structure | |
443 | * | |
444 | * This function is used to reads in all data sources and reports | |
445 | * them to the input subsystem. | |
446 | */ | |
447 | static int synaptics_rmi4_sensor_report(struct synaptics_rmi4_data *pdata) | |
448 | { | |
449 | unsigned char intr_status[4]; | |
450 | /* number of touch points - fingers or buttons */ | |
451 | int touch = 0; | |
452 | unsigned int retval; | |
453 | struct synaptics_rmi4_fn *rfi; | |
454 | struct synaptics_rmi4_device_info *rmi; | |
455 | struct i2c_client *client = pdata->i2c_client; | |
456 | ||
457 | /* | |
458 | * Get the interrupt status from the function $01 | |
459 | * control register+1 to find which source(s) were interrupting | |
460 | * so we can read the data from the source(s) (2D sensor, buttons..) | |
461 | */ | |
462 | retval = synaptics_rmi4_i2c_block_read(pdata, | |
463 | pdata->fn01_data_base_addr + 1, | |
464 | intr_status, | |
465 | pdata->number_of_interrupt_register); | |
466 | if (retval != pdata->number_of_interrupt_register) { | |
467 | dev_err(&client->dev, | |
468 | "could not read interrupt status registers\n"); | |
469 | return 0; | |
470 | } | |
471 | /* | |
472 | * check each function that has data sources and if the interrupt for | |
473 | * that triggered then call that RMI4 functions report() function to | |
474 | * gather data and report it to the input subsystem | |
475 | */ | |
476 | rmi = &(pdata->rmi4_mod_info); | |
477 | list_for_each_entry(rfi, &rmi->support_fn_list, link) { | |
478 | if (rfi->num_of_data_sources) { | |
479 | if (intr_status[rfi->index_to_intr_reg] & | |
480 | rfi->intr_mask) | |
481 | touch = synaptics_rmi4_report_device(pdata, | |
482 | rfi); | |
483 | } | |
484 | } | |
485 | /* return the number of touch points */ | |
486 | return touch; | |
487 | } | |
488 | ||
489 | /** | |
490 | * synaptics_rmi4_irq() - thread function for rmi4 attention line | |
491 | * @irq: irq value | |
492 | * @data: void pointer | |
493 | * | |
494 | * This function is interrupt thread function. It just notifies the | |
495 | * application layer that attention is required. | |
496 | */ | |
497 | static irqreturn_t synaptics_rmi4_irq(int irq, void *data) | |
498 | { | |
499 | struct synaptics_rmi4_data *pdata = data; | |
500 | int touch_count; | |
501 | do { | |
502 | touch_count = synaptics_rmi4_sensor_report(pdata); | |
503 | if (touch_count) | |
504 | wait_event_timeout(pdata->wait, pdata->touch_stopped, | |
505 | msecs_to_jiffies(1)); | |
506 | else | |
507 | break; | |
508 | } while (!pdata->touch_stopped); | |
509 | return IRQ_HANDLED; | |
510 | } | |
511 | ||
512 | /** | |
513 | * synpatics_rmi4_touchpad_detect() - detects the rmi4 touchpad device | |
514 | * @pdata: pointer to synaptics_rmi4_data structure | |
515 | * @rfi: pointer to synaptics_rmi4_fn structure | |
516 | * @fd: pointer to synaptics_rmi4_fn_desc structure | |
517 | * @interruptcount: count the number of interrupts | |
518 | * | |
519 | * This function calls to detects the rmi4 touchpad device | |
520 | */ | |
521 | static int synpatics_rmi4_touchpad_detect(struct synaptics_rmi4_data *pdata, | |
522 | struct synaptics_rmi4_fn *rfi, | |
523 | struct synaptics_rmi4_fn_desc *fd, | |
524 | unsigned int interruptcount) | |
525 | { | |
526 | unsigned char queries[QUERY_LEN]; | |
527 | unsigned short intr_offset; | |
528 | unsigned char abs_data_size; | |
529 | unsigned char abs_data_blk_size; | |
530 | unsigned char egr_0, egr_1; | |
531 | unsigned int all_data_blk_size; | |
532 | int has_pinch, has_flick, has_tap; | |
533 | int has_tapandhold, has_doubletap; | |
534 | int has_earlytap, has_press; | |
535 | int has_palmdetect, has_rotate; | |
536 | int has_rel; | |
537 | int i; | |
538 | int retval; | |
539 | struct i2c_client *client = pdata->i2c_client; | |
540 | ||
541 | rfi->fn_desc.query_base_addr = fd->query_base_addr; | |
542 | rfi->fn_desc.data_base_addr = fd->data_base_addr; | |
543 | rfi->fn_desc.intr_src_count = fd->intr_src_count; | |
544 | rfi->fn_desc.fn_number = fd->fn_number; | |
545 | rfi->fn_number = fd->fn_number; | |
546 | rfi->num_of_data_sources = fd->intr_src_count; | |
547 | rfi->fn_desc.ctrl_base_addr = fd->ctrl_base_addr; | |
548 | rfi->fn_desc.cmd_base_addr = fd->cmd_base_addr; | |
549 | ||
550 | /* | |
551 | * need to get number of fingers supported, data size, etc. | |
552 | * to be used when getting data since the number of registers to | |
553 | * read depends on the number of fingers supported and data size. | |
554 | */ | |
555 | retval = synaptics_rmi4_i2c_block_read(pdata, fd->query_base_addr, | |
556 | queries, | |
557 | sizeof(queries)); | |
558 | if (retval != sizeof(queries)) { | |
559 | dev_err(&client->dev, "%s:read function query registers\n", | |
560 | __func__); | |
561 | return retval; | |
562 | } | |
563 | /* | |
564 | * 2D data sources have only 3 bits for the number of fingers | |
25985edc | 565 | * supported - so the encoding is a bit weird. |
eba499d3 NKG |
566 | */ |
567 | if ((queries[1] & MASK_3BIT) <= 4) | |
568 | /* add 1 since zero based */ | |
569 | rfi->num_of_data_points = (queries[1] & MASK_3BIT) + 1; | |
570 | else { | |
571 | /* | |
572 | * a value of 5 is up to 10 fingers - 6 and 7 are reserved | |
573 | * (shouldn't get these i int retval;n a normal 2D source). | |
574 | */ | |
575 | if ((queries[1] & MASK_3BIT) == 5) | |
576 | rfi->num_of_data_points = 10; | |
577 | } | |
578 | /* Need to get interrupt info for handling interrupts */ | |
579 | rfi->index_to_intr_reg = (interruptcount + 7)/8; | |
580 | if (rfi->index_to_intr_reg != 0) | |
581 | rfi->index_to_intr_reg -= 1; | |
582 | /* | |
583 | * loop through interrupts for each source in fn $11 | |
584 | * and or in a bit to the interrupt mask for each. | |
585 | */ | |
586 | intr_offset = interruptcount % 8; | |
587 | rfi->intr_mask = 0; | |
588 | for (i = intr_offset; | |
589 | i < ((fd->intr_src_count & MASK_3BIT) + intr_offset); i++) | |
590 | rfi->intr_mask |= 1 << i; | |
591 | ||
592 | /* Size of just the absolute data for one finger */ | |
593 | abs_data_size = queries[5] & MASK_2BIT; | |
594 | /* One each for X and Y, one for LSB for X & Y, one for W, one for Z */ | |
595 | abs_data_blk_size = 3 + (2 * (abs_data_size == 0 ? 1 : 0)); | |
596 | rfi->size_of_data_register_block = abs_data_blk_size; | |
597 | ||
598 | /* | |
599 | * need to determine the size of data to read - this depends on | |
600 | * conditions such as whether Relative data is reported and if Gesture | |
601 | * data is reported. | |
602 | */ | |
603 | egr_0 = queries[7]; | |
604 | egr_1 = queries[8]; | |
605 | ||
606 | /* | |
607 | * Get info about what EGR data is supported, whether it has | |
608 | * Relative data supported, etc. | |
609 | */ | |
610 | has_pinch = egr_0 & HAS_PINCH; | |
611 | has_flick = egr_0 & HAS_FLICK; | |
612 | has_tap = egr_0 & HAS_TAP; | |
613 | has_earlytap = egr_0 & HAS_EARLYTAP; | |
614 | has_press = egr_0 & HAS_PRESS; | |
615 | has_rotate = egr_1 & HAS_ROTATE; | |
616 | has_rel = queries[1] & HAS_RELEASE; | |
617 | has_tapandhold = egr_0 & HAS_TAPANDHOLD; | |
618 | has_doubletap = egr_0 & HAS_DOUBLETAP; | |
619 | has_palmdetect = egr_1 & HAS_PALMDETECT; | |
620 | ||
621 | /* | |
622 | * Size of all data including finger status, absolute data for each | |
623 | * finger, relative data and EGR data | |
624 | */ | |
625 | all_data_blk_size = | |
626 | /* finger status, four fingers per register */ | |
627 | ((rfi->num_of_data_points + 3) / 4) + | |
628 | /* absolute data, per finger times number of fingers */ | |
629 | (abs_data_blk_size * rfi->num_of_data_points) + | |
630 | /* | |
631 | * two relative registers (if relative is being reported) | |
632 | */ | |
633 | 2 * has_rel + | |
634 | /* | |
635 | * F11_2D_data8 is only present if the egr_0 | |
636 | * register is non-zero. | |
637 | */ | |
638 | !!(egr_0) + | |
639 | /* | |
640 | * F11_2D_data9 is only present if either egr_0 or | |
641 | * egr_1 registers are non-zero. | |
642 | */ | |
643 | (egr_0 || egr_1) + | |
644 | /* | |
645 | * F11_2D_data10 is only present if EGR_PINCH or EGR_FLICK of | |
646 | * egr_0 reports as 1. | |
647 | */ | |
648 | !!(has_pinch | has_flick) + | |
649 | /* | |
650 | * F11_2D_data11 and F11_2D_data12 are only present if | |
651 | * EGR_FLICK of egr_0 reports as 1. | |
652 | */ | |
653 | 2 * !!(has_flick); | |
654 | return retval; | |
655 | } | |
656 | ||
657 | /** | |
d761074b | 658 | * synaptics_rmi4_touchpad_config() - configures the rmi4 touchpad device |
eba499d3 NKG |
659 | * @pdata: pointer to synaptics_rmi4_data structure |
660 | * @rfi: pointer to synaptics_rmi4_fn structure | |
661 | * | |
d761074b | 662 | * This function calls to configures the rmi4 touchpad device |
eba499d3 | 663 | */ |
d761074b | 664 | int synaptics_rmi4_touchpad_config(struct synaptics_rmi4_data *pdata, |
eba499d3 NKG |
665 | struct synaptics_rmi4_fn *rfi) |
666 | { | |
667 | /* | |
668 | * For the data source - print info and do any | |
669 | * source specific configuration. | |
670 | */ | |
671 | unsigned char data[BUF_LEN]; | |
672 | int retval = 0; | |
673 | struct i2c_client *client = pdata->i2c_client; | |
674 | ||
675 | /* Get and print some info about the data source... */ | |
676 | /* To Query 2D devices we need to read from the address obtained | |
677 | * from the function descriptor stored in the RMI function info. | |
678 | */ | |
679 | retval = synaptics_rmi4_i2c_block_read(pdata, | |
680 | rfi->fn_desc.query_base_addr, | |
681 | data, QUERY_LEN); | |
682 | if (retval != QUERY_LEN) | |
683 | dev_err(&client->dev, "%s:read query registers failed\n", | |
684 | __func__); | |
685 | else { | |
686 | retval = synaptics_rmi4_i2c_block_read(pdata, | |
687 | rfi->fn_desc.ctrl_base_addr, | |
688 | data, DATA_BUF_LEN); | |
689 | if (retval != DATA_BUF_LEN) { | |
690 | dev_err(&client->dev, | |
691 | "%s:read control registers failed\n", | |
692 | __func__); | |
693 | return retval; | |
694 | } | |
695 | /* Store these for use later*/ | |
696 | pdata->sensor_max_x = ((data[6] & MASK_8BIT) << 0) | | |
697 | ((data[7] & MASK_4BIT) << 8); | |
698 | pdata->sensor_max_y = ((data[8] & MASK_5BIT) << 0) | | |
699 | ((data[9] & MASK_4BIT) << 8); | |
700 | } | |
701 | return retval; | |
702 | } | |
703 | ||
704 | /** | |
705 | * synaptics_rmi4_i2c_query_device() - query the rmi4 device | |
706 | * @pdata: pointer to synaptics_rmi4_data structure | |
707 | * | |
708 | * This function is used to query the rmi4 device. | |
709 | */ | |
710 | static int synaptics_rmi4_i2c_query_device(struct synaptics_rmi4_data *pdata) | |
711 | { | |
712 | int i; | |
713 | int retval; | |
714 | unsigned char std_queries[STD_QUERY_LEN]; | |
715 | unsigned char intr_count = 0; | |
716 | int data_sources = 0; | |
717 | unsigned int ctrl_offset; | |
718 | struct synaptics_rmi4_fn *rfi; | |
719 | struct synaptics_rmi4_fn_desc rmi_fd; | |
720 | struct synaptics_rmi4_device_info *rmi; | |
721 | struct i2c_client *client = pdata->i2c_client; | |
722 | ||
723 | /* | |
724 | * init the physical drivers RMI module | |
725 | * info list of functions | |
726 | */ | |
727 | INIT_LIST_HEAD(&pdata->rmi4_mod_info.support_fn_list); | |
728 | ||
729 | /* | |
730 | * Read the Page Descriptor Table to determine what functions | |
731 | * are present | |
732 | */ | |
733 | for (i = PDT_START_SCAN_LOCATION; i > PDT_END_SCAN_LOCATION; | |
734 | i -= PDT_ENTRY_SIZE) { | |
735 | retval = synaptics_rmi4_i2c_block_read(pdata, i, | |
736 | (unsigned char *)&rmi_fd, | |
737 | sizeof(rmi_fd)); | |
738 | if (retval != sizeof(rmi_fd)) { | |
739 | /* failed to read next PDT entry */ | |
740 | dev_err(&client->dev, "%s: read error\n", __func__); | |
741 | return -EIO; | |
742 | } | |
743 | rfi = NULL; | |
744 | if (rmi_fd.fn_number) { | |
745 | switch (rmi_fd.fn_number & MASK_8BIT) { | |
746 | case SYNAPTICS_RMI4_DEVICE_CONTROL_FUNC_NUM: | |
747 | pdata->fn01_query_base_addr = | |
748 | rmi_fd.query_base_addr; | |
749 | pdata->fn01_ctrl_base_addr = | |
750 | rmi_fd.ctrl_base_addr; | |
751 | pdata->fn01_data_base_addr = | |
752 | rmi_fd.data_base_addr; | |
753 | break; | |
754 | case SYNAPTICS_RMI4_TOUCHPAD_FUNC_NUM: | |
755 | if (rmi_fd.intr_src_count) { | |
756 | rfi = kmalloc(sizeof(*rfi), | |
757 | GFP_KERNEL); | |
758 | if (!rfi) { | |
759 | dev_err(&client->dev, | |
760 | "%s:kmalloc failed\n", | |
761 | __func__); | |
762 | return -ENOMEM; | |
763 | } | |
764 | retval = synpatics_rmi4_touchpad_detect | |
765 | (pdata, rfi, | |
766 | &rmi_fd, | |
767 | intr_count); | |
819d4eb1 AB |
768 | if (retval < 0) { |
769 | kfree(rfi); | |
eba499d3 | 770 | return retval; |
819d4eb1 | 771 | } |
eba499d3 NKG |
772 | } |
773 | break; | |
774 | } | |
775 | /* interrupt count for next iteration */ | |
776 | intr_count += (rmi_fd.intr_src_count & MASK_3BIT); | |
777 | /* | |
778 | * We only want to add functions to the list | |
779 | * that have data associated with them. | |
780 | */ | |
781 | if (rfi && rmi_fd.intr_src_count) { | |
782 | /* link this function info to the RMI module */ | |
783 | mutex_lock(&(pdata->fn_list_mutex)); | |
784 | list_add_tail(&rfi->link, | |
785 | &pdata->rmi4_mod_info.support_fn_list); | |
786 | mutex_unlock(&(pdata->fn_list_mutex)); | |
787 | } | |
788 | } else { | |
789 | /* | |
790 | * A zero in the function number | |
791 | * signals the end of the PDT | |
792 | */ | |
793 | dev_dbg(&client->dev, | |
794 | "%s:end of PDT\n", __func__); | |
795 | break; | |
796 | } | |
797 | } | |
798 | /* | |
799 | * calculate the interrupt register count - used in the | |
800 | * ISR to read the correct number of interrupt registers | |
801 | */ | |
802 | pdata->number_of_interrupt_register = (intr_count + 7) / 8; | |
803 | /* | |
804 | * Function $01 will be used to query the product properties, | |
805 | * and product ID so we had to read the PDT above first to get | |
806 | * the Fn $01 query address and prior to filling in the product | |
807 | * info. NOTE: Even an unflashed device will still have FN $01. | |
808 | */ | |
809 | ||
810 | /* Load up the standard queries and get the RMI4 module info */ | |
811 | retval = synaptics_rmi4_i2c_block_read(pdata, | |
812 | pdata->fn01_query_base_addr, | |
813 | std_queries, | |
814 | sizeof(std_queries)); | |
815 | if (retval != sizeof(std_queries)) { | |
816 | dev_err(&client->dev, "%s:Failed reading queries\n", | |
817 | __func__); | |
818 | return -EIO; | |
819 | } | |
820 | ||
821 | /* Currently supported RMI version is 4.0 */ | |
822 | pdata->rmi4_mod_info.version_major = 4; | |
823 | pdata->rmi4_mod_info.version_minor = 0; | |
824 | /* | |
825 | * get manufacturer id, product_props, product info, | |
826 | * date code, tester id, serial num and product id (name) | |
827 | */ | |
828 | pdata->rmi4_mod_info.manufacturer_id = std_queries[0]; | |
829 | pdata->rmi4_mod_info.product_props = std_queries[1]; | |
830 | pdata->rmi4_mod_info.product_info[0] = std_queries[2]; | |
831 | pdata->rmi4_mod_info.product_info[1] = std_queries[3]; | |
832 | /* year - 2001-2032 */ | |
833 | pdata->rmi4_mod_info.date_code[0] = std_queries[4] & MASK_5BIT; | |
834 | /* month - 1-12 */ | |
835 | pdata->rmi4_mod_info.date_code[1] = std_queries[5] & MASK_4BIT; | |
836 | /* day - 1-31 */ | |
837 | pdata->rmi4_mod_info.date_code[2] = std_queries[6] & MASK_5BIT; | |
838 | pdata->rmi4_mod_info.tester_id = ((std_queries[7] & MASK_7BIT) << 8) | | |
839 | (std_queries[8] & MASK_7BIT); | |
840 | pdata->rmi4_mod_info.serial_number = | |
841 | ((std_queries[9] & MASK_7BIT) << 8) | | |
842 | (std_queries[10] & MASK_7BIT); | |
843 | memcpy(pdata->rmi4_mod_info.product_id_string, &std_queries[11], 10); | |
844 | ||
845 | /* Check if this is a Synaptics device - report if not. */ | |
846 | if (pdata->rmi4_mod_info.manufacturer_id != 1) | |
847 | dev_err(&client->dev, "%s: non-Synaptics mfg id:%d\n", | |
848 | __func__, pdata->rmi4_mod_info.manufacturer_id); | |
849 | ||
850 | list_for_each_entry(rfi, &pdata->rmi4_mod_info.support_fn_list, link) | |
851 | data_sources += rfi->num_of_data_sources; | |
852 | if (data_sources) { | |
853 | rmi = &(pdata->rmi4_mod_info); | |
854 | list_for_each_entry(rfi, &rmi->support_fn_list, link) { | |
855 | if (rfi->num_of_data_sources) { | |
856 | if (rfi->fn_number == | |
857 | SYNAPTICS_RMI4_TOUCHPAD_FUNC_NUM) { | |
d761074b | 858 | retval = synaptics_rmi4_touchpad_config |
eba499d3 NKG |
859 | (pdata, rfi); |
860 | if (retval < 0) | |
861 | return retval; | |
862 | } else | |
863 | dev_err(&client->dev, | |
864 | "%s:fn_number not supported\n", | |
865 | __func__); | |
866 | /* | |
867 | * Turn on interrupts for this | |
868 | * function's data sources. | |
869 | */ | |
870 | ctrl_offset = pdata->fn01_ctrl_base_addr + 1 + | |
871 | rfi->index_to_intr_reg; | |
872 | retval = synaptics_rmi4_i2c_byte_write(pdata, | |
873 | ctrl_offset, | |
874 | rfi->intr_mask); | |
875 | if (retval < 0) | |
876 | return retval; | |
877 | } | |
878 | } | |
879 | } | |
880 | return 0; | |
881 | } | |
882 | ||
883 | /** | |
884 | * synaptics_rmi4_probe() - Initialze the i2c-client touchscreen driver | |
885 | * @i2c: i2c client structure pointer | |
886 | * @id:i2c device id pointer | |
887 | * | |
888 | * This function will allocate and initialize the instance | |
889 | * data and request the irq and set the instance data as the clients | |
890 | * platform data then register the physical driver which will do a scan of | |
891 | * the rmi4 Physical Device Table and enumerate any rmi4 functions that | |
892 | * have data sources associated with them. | |
893 | */ | |
894 | static int __devinit synaptics_rmi4_probe | |
895 | (struct i2c_client *client, const struct i2c_device_id *dev_id) | |
896 | { | |
897 | int retval; | |
898 | unsigned char intr_status[4]; | |
899 | struct synaptics_rmi4_data *rmi4_data; | |
900 | const struct synaptics_rmi4_platform_data *platformdata = | |
901 | client->dev.platform_data; | |
902 | ||
903 | if (!i2c_check_functionality(client->adapter, | |
904 | I2C_FUNC_SMBUS_BYTE_DATA)) { | |
905 | dev_err(&client->dev, "i2c smbus byte data not supported\n"); | |
906 | return -EIO; | |
907 | } | |
908 | ||
909 | if (!platformdata) { | |
910 | dev_err(&client->dev, "%s: no platform data\n", __func__); | |
911 | return -EINVAL; | |
912 | } | |
913 | ||
914 | /* Allocate and initialize the instance data for this client */ | |
915 | rmi4_data = kzalloc(sizeof(struct synaptics_rmi4_data) * 2, | |
916 | GFP_KERNEL); | |
917 | if (!rmi4_data) { | |
918 | dev_err(&client->dev, "%s: no memory allocated\n", __func__); | |
919 | return -ENOMEM; | |
920 | } | |
921 | ||
922 | rmi4_data->input_dev = input_allocate_device(); | |
923 | if (rmi4_data->input_dev == NULL) { | |
924 | dev_err(&client->dev, "%s:input device alloc failed\n", | |
925 | __func__); | |
926 | retval = -ENOMEM; | |
927 | goto err_input; | |
928 | } | |
929 | ||
7a176332 NKG |
930 | rmi4_data->regulator = regulator_get(&client->dev, "vdd"); |
931 | if (IS_ERR(rmi4_data->regulator)) { | |
932 | dev_err(&client->dev, "%s:get regulator failed\n", | |
933 | __func__); | |
934 | retval = PTR_ERR(rmi4_data->regulator); | |
935 | goto err_get_regulator; | |
936 | } | |
937 | retval = regulator_enable(rmi4_data->regulator); | |
938 | if (retval < 0) { | |
939 | dev_err(&client->dev, "%s:regulator enable failed\n", | |
940 | __func__); | |
941 | goto err_regulator_enable; | |
eba499d3 | 942 | } |
eba499d3 NKG |
943 | init_waitqueue_head(&rmi4_data->wait); |
944 | /* | |
945 | * Copy i2c_client pointer into RTID's i2c_client pointer for | |
946 | * later use in rmi4_read, rmi4_write, etc. | |
947 | */ | |
948 | rmi4_data->i2c_client = client; | |
949 | /* So we set the page correctly the first time */ | |
950 | rmi4_data->current_page = MASK_16BIT; | |
951 | rmi4_data->board = platformdata; | |
952 | rmi4_data->touch_stopped = false; | |
953 | ||
954 | /* init the mutexes for maintain the lists */ | |
955 | mutex_init(&(rmi4_data->fn_list_mutex)); | |
956 | mutex_init(&(rmi4_data->rmi4_page_mutex)); | |
957 | ||
958 | /* | |
959 | * Register physical driver - this will call the detect function that | |
960 | * will then scan the device and determine the supported | |
961 | * rmi4 functions. | |
962 | */ | |
963 | retval = synaptics_rmi4_i2c_query_device(rmi4_data); | |
964 | if (retval) { | |
965 | dev_err(&client->dev, "%s: rmi4 query device failed\n", | |
966 | __func__); | |
967 | goto err_query_dev; | |
968 | } | |
969 | ||
970 | /* Store the instance data in the i2c_client */ | |
971 | i2c_set_clientdata(client, rmi4_data); | |
972 | ||
973 | /*initialize the input device parameters */ | |
974 | rmi4_data->input_dev->name = DRIVER_NAME; | |
975 | rmi4_data->input_dev->phys = "Synaptics_Clearpad"; | |
976 | rmi4_data->input_dev->id.bustype = BUS_I2C; | |
977 | rmi4_data->input_dev->dev.parent = &client->dev; | |
978 | input_set_drvdata(rmi4_data->input_dev, rmi4_data); | |
979 | ||
980 | /* Initialize the function handlers for rmi4 */ | |
981 | set_bit(EV_SYN, rmi4_data->input_dev->evbit); | |
982 | set_bit(EV_KEY, rmi4_data->input_dev->evbit); | |
983 | set_bit(EV_ABS, rmi4_data->input_dev->evbit); | |
984 | ||
985 | input_set_abs_params(rmi4_data->input_dev, ABS_MT_POSITION_X, 0, | |
986 | rmi4_data->sensor_max_x, 0, 0); | |
987 | input_set_abs_params(rmi4_data->input_dev, ABS_MT_POSITION_Y, 0, | |
988 | rmi4_data->sensor_max_y, 0, 0); | |
989 | input_set_abs_params(rmi4_data->input_dev, ABS_MT_TOUCH_MAJOR, 0, | |
990 | MAX_TOUCH_MAJOR, 0, 0); | |
991 | ||
eba499d3 NKG |
992 | /* Clear interrupts */ |
993 | synaptics_rmi4_i2c_block_read(rmi4_data, | |
994 | rmi4_data->fn01_data_base_addr + 1, intr_status, | |
995 | rmi4_data->number_of_interrupt_register); | |
996 | retval = request_threaded_irq(platformdata->irq_number, NULL, | |
997 | synaptics_rmi4_irq, | |
998 | platformdata->irq_type, | |
4ac638b2 | 999 | DRIVER_NAME, rmi4_data); |
eba499d3 NKG |
1000 | if (retval) { |
1001 | dev_err(&client->dev, "%s:Unable to get attn irq %d\n", | |
1002 | __func__, platformdata->irq_number); | |
949c3676 | 1003 | goto err_query_dev; |
f32b8453 DC |
1004 | } |
1005 | ||
1006 | retval = input_register_device(rmi4_data->input_dev); | |
1007 | if (retval) { | |
1008 | dev_err(&client->dev, "%s:input register failed\n", __func__); | |
1009 | goto err_free_irq; | |
eba499d3 NKG |
1010 | } |
1011 | ||
1012 | return retval; | |
1013 | ||
f32b8453 | 1014 | err_free_irq: |
eba499d3 | 1015 | free_irq(platformdata->irq_number, rmi4_data); |
eba499d3 | 1016 | err_query_dev: |
7a176332 NKG |
1017 | regulator_disable(rmi4_data->regulator); |
1018 | err_regulator_enable: | |
1019 | regulator_put(rmi4_data->regulator); | |
1020 | err_get_regulator: | |
eba499d3 NKG |
1021 | input_free_device(rmi4_data->input_dev); |
1022 | rmi4_data->input_dev = NULL; | |
1023 | err_input: | |
1024 | kfree(rmi4_data); | |
1025 | ||
1026 | return retval; | |
1027 | } | |
1028 | /** | |
1029 | * synaptics_rmi4_remove() - Removes the i2c-client touchscreen driver | |
1030 | * @client: i2c client structure pointer | |
1031 | * | |
25985edc | 1032 | * This function uses to remove the i2c-client |
eba499d3 NKG |
1033 | * touchscreen driver and returns integer. |
1034 | */ | |
1035 | static int __devexit synaptics_rmi4_remove(struct i2c_client *client) | |
1036 | { | |
1037 | struct synaptics_rmi4_data *rmi4_data = i2c_get_clientdata(client); | |
1038 | const struct synaptics_rmi4_platform_data *pdata = rmi4_data->board; | |
1039 | ||
1040 | rmi4_data->touch_stopped = true; | |
1041 | wake_up(&rmi4_data->wait); | |
1042 | free_irq(pdata->irq_number, rmi4_data); | |
1043 | input_unregister_device(rmi4_data->input_dev); | |
7a176332 NKG |
1044 | regulator_disable(rmi4_data->regulator); |
1045 | regulator_put(rmi4_data->regulator); | |
eba499d3 NKG |
1046 | kfree(rmi4_data); |
1047 | ||
1048 | return 0; | |
1049 | } | |
1050 | ||
1051 | #ifdef CONFIG_PM | |
1052 | /** | |
1053 | * synaptics_rmi4_suspend() - suspend the touch screen controller | |
1054 | * @dev: pointer to device structure | |
1055 | * | |
25985edc | 1056 | * This function is used to suspend the |
eba499d3 NKG |
1057 | * touch panel controller and returns integer |
1058 | */ | |
1059 | static int synaptics_rmi4_suspend(struct device *dev) | |
1060 | { | |
1061 | /* Touch sleep mode */ | |
1062 | int retval; | |
1063 | unsigned char intr_status; | |
1064 | struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev); | |
1065 | const struct synaptics_rmi4_platform_data *pdata = rmi4_data->board; | |
1066 | ||
1067 | rmi4_data->touch_stopped = true; | |
1068 | disable_irq(pdata->irq_number); | |
1069 | ||
1070 | retval = synaptics_rmi4_i2c_block_read(rmi4_data, | |
1071 | rmi4_data->fn01_data_base_addr + 1, | |
1072 | &intr_status, | |
1073 | rmi4_data->number_of_interrupt_register); | |
1074 | if (retval < 0) | |
1075 | return retval; | |
1076 | ||
1077 | retval = synaptics_rmi4_i2c_byte_write(rmi4_data, | |
1078 | rmi4_data->fn01_ctrl_base_addr + 1, | |
1079 | (intr_status & ~TOUCHPAD_CTRL_INTR)); | |
1080 | if (retval < 0) | |
1081 | return retval; | |
1082 | ||
7a176332 | 1083 | regulator_disable(rmi4_data->regulator); |
eba499d3 NKG |
1084 | |
1085 | return 0; | |
1086 | } | |
1087 | /** | |
1088 | * synaptics_rmi4_resume() - resume the touch screen controller | |
1089 | * @dev: pointer to device structure | |
1090 | * | |
25985edc | 1091 | * This function is used to resume the touch panel |
eba499d3 NKG |
1092 | * controller and returns integer. |
1093 | */ | |
1094 | static int synaptics_rmi4_resume(struct device *dev) | |
1095 | { | |
1096 | int retval; | |
1097 | unsigned char intr_status; | |
1098 | struct synaptics_rmi4_data *rmi4_data = dev_get_drvdata(dev); | |
1099 | const struct synaptics_rmi4_platform_data *pdata = rmi4_data->board; | |
1100 | ||
7a176332 | 1101 | regulator_enable(rmi4_data->regulator); |
eba499d3 NKG |
1102 | |
1103 | enable_irq(pdata->irq_number); | |
1104 | rmi4_data->touch_stopped = false; | |
1105 | ||
1106 | retval = synaptics_rmi4_i2c_block_read(rmi4_data, | |
1107 | rmi4_data->fn01_data_base_addr + 1, | |
1108 | &intr_status, | |
1109 | rmi4_data->number_of_interrupt_register); | |
1110 | if (retval < 0) | |
1111 | return retval; | |
1112 | ||
1113 | retval = synaptics_rmi4_i2c_byte_write(rmi4_data, | |
1114 | rmi4_data->fn01_ctrl_base_addr + 1, | |
1115 | (intr_status | TOUCHPAD_CTRL_INTR)); | |
1116 | if (retval < 0) | |
1117 | return retval; | |
1118 | ||
1119 | return 0; | |
1120 | } | |
1121 | ||
1122 | static const struct dev_pm_ops synaptics_rmi4_dev_pm_ops = { | |
1123 | .suspend = synaptics_rmi4_suspend, | |
1124 | .resume = synaptics_rmi4_resume, | |
1125 | }; | |
1126 | #endif | |
1127 | ||
1128 | static const struct i2c_device_id synaptics_rmi4_id_table[] = { | |
1129 | { DRIVER_NAME, 0 }, | |
1130 | { }, | |
1131 | }; | |
1132 | MODULE_DEVICE_TABLE(i2c, synaptics_rmi4_id_table); | |
1133 | ||
1134 | static struct i2c_driver synaptics_rmi4_driver = { | |
1135 | .driver = { | |
1136 | .name = DRIVER_NAME, | |
1137 | .owner = THIS_MODULE, | |
1138 | #ifdef CONFIG_PM | |
1139 | .pm = &synaptics_rmi4_dev_pm_ops, | |
1140 | #endif | |
1141 | }, | |
1142 | .probe = synaptics_rmi4_probe, | |
1143 | .remove = __devexit_p(synaptics_rmi4_remove), | |
1144 | .id_table = synaptics_rmi4_id_table, | |
1145 | }; | |
1146 | /** | |
1147 | * synaptics_rmi4_init() - Initialize the touchscreen driver | |
1148 | * | |
25985edc | 1149 | * This function uses to initializes the synaptics |
eba499d3 NKG |
1150 | * touchscreen driver and returns integer. |
1151 | */ | |
1152 | static int __init synaptics_rmi4_init(void) | |
1153 | { | |
1154 | return i2c_add_driver(&synaptics_rmi4_driver); | |
1155 | } | |
1156 | /** | |
1157 | * synaptics_rmi4_exit() - De-initialize the touchscreen driver | |
1158 | * | |
25985edc | 1159 | * This function uses to de-initialize the synaptics |
eba499d3 NKG |
1160 | * touchscreen driver and returns none. |
1161 | */ | |
1162 | static void __exit synaptics_rmi4_exit(void) | |
1163 | { | |
1164 | i2c_del_driver(&synaptics_rmi4_driver); | |
1165 | } | |
1166 | ||
1167 | ||
1168 | module_init(synaptics_rmi4_init); | |
1169 | module_exit(synaptics_rmi4_exit); | |
1170 | ||
1171 | MODULE_LICENSE("GPL v2"); | |
1172 | MODULE_AUTHOR("naveen.gaddipati@stericsson.com, js.ha@stericsson.com"); | |
1173 | MODULE_DESCRIPTION("synaptics rmi4 i2c touch Driver"); | |
1174 | MODULE_ALIAS("i2c:synaptics_rmi4_ts"); |