Commit | Line | Data |
---|---|---|
2b6a321d AD |
1 | /* |
2 | * Copyright (c) 2011-2016 Synaptics Incorporated | |
3 | * Copyright (c) 2011 Unixphere | |
4 | * | |
5 | * This driver provides the core support for a single RMI4-based device. | |
6 | * | |
7 | * The RMI4 specification can be found here (URL split for line length): | |
8 | * | |
9 | * http://www.synaptics.com/sites/default/files/ | |
10 | * 511-000136-01-Rev-E-RMI4-Interfacing-Guide.pdf | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify it | |
13 | * under the terms of the GNU General Public License version 2 as published by | |
14 | * the Free Software Foundation. | |
15 | */ | |
16 | ||
17 | #include <linux/bitmap.h> | |
18 | #include <linux/delay.h> | |
19 | #include <linux/fs.h> | |
3aeed5b5 | 20 | #include <linux/irq.h> |
2b6a321d AD |
21 | #include <linux/pm.h> |
22 | #include <linux/slab.h> | |
d8a8b3ed | 23 | #include <linux/of.h> |
2b6a321d AD |
24 | #include <uapi/linux/input.h> |
25 | #include <linux/rmi.h> | |
26 | #include "rmi_bus.h" | |
27 | #include "rmi_driver.h" | |
28 | ||
29 | #define HAS_NONSTANDARD_PDT_MASK 0x40 | |
30 | #define RMI4_MAX_PAGE 0xff | |
31 | #define RMI4_PAGE_SIZE 0x100 | |
32 | #define RMI4_PAGE_MASK 0xFF00 | |
33 | ||
34 | #define RMI_DEVICE_RESET_CMD 0x01 | |
35 | #define DEFAULT_RESET_DELAY_MS 100 | |
36 | ||
29fd0ec2 | 37 | void rmi_free_function_list(struct rmi_device *rmi_dev) |
2b6a321d AD |
38 | { |
39 | struct rmi_function *fn, *tmp; | |
40 | struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev); | |
41 | ||
6bd0dcfa ND |
42 | rmi_dbg(RMI_DEBUG_CORE, &rmi_dev->dev, "Freeing function list\n"); |
43 | ||
29fd0ec2 ND |
44 | devm_kfree(&rmi_dev->dev, data->irq_memory); |
45 | data->irq_memory = NULL; | |
46 | data->irq_status = NULL; | |
47 | data->fn_irq_bits = NULL; | |
48 | data->current_irq_mask = NULL; | |
49 | data->new_irq_mask = NULL; | |
50 | ||
2b6a321d | 51 | data->f01_container = NULL; |
29fd0ec2 | 52 | data->f34_container = NULL; |
2b6a321d AD |
53 | |
54 | /* Doing it in the reverse order so F01 will be removed last */ | |
55 | list_for_each_entry_safe_reverse(fn, tmp, | |
56 | &data->function_list, node) { | |
57 | list_del(&fn->node); | |
58 | rmi_unregister_function(fn); | |
59 | } | |
60 | } | |
61 | ||
62 | static int reset_one_function(struct rmi_function *fn) | |
63 | { | |
64 | struct rmi_function_handler *fh; | |
65 | int retval = 0; | |
66 | ||
67 | if (!fn || !fn->dev.driver) | |
68 | return 0; | |
69 | ||
70 | fh = to_rmi_function_handler(fn->dev.driver); | |
71 | if (fh->reset) { | |
72 | retval = fh->reset(fn); | |
73 | if (retval < 0) | |
74 | dev_err(&fn->dev, "Reset failed with code %d.\n", | |
75 | retval); | |
76 | } | |
77 | ||
78 | return retval; | |
79 | } | |
80 | ||
81 | static int configure_one_function(struct rmi_function *fn) | |
82 | { | |
83 | struct rmi_function_handler *fh; | |
84 | int retval = 0; | |
85 | ||
86 | if (!fn || !fn->dev.driver) | |
87 | return 0; | |
88 | ||
89 | fh = to_rmi_function_handler(fn->dev.driver); | |
90 | if (fh->config) { | |
91 | retval = fh->config(fn); | |
92 | if (retval < 0) | |
93 | dev_err(&fn->dev, "Config failed with code %d.\n", | |
94 | retval); | |
95 | } | |
96 | ||
97 | return retval; | |
98 | } | |
99 | ||
100 | static int rmi_driver_process_reset_requests(struct rmi_device *rmi_dev) | |
101 | { | |
102 | struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev); | |
103 | struct rmi_function *entry; | |
104 | int retval; | |
105 | ||
106 | list_for_each_entry(entry, &data->function_list, node) { | |
107 | retval = reset_one_function(entry); | |
108 | if (retval < 0) | |
109 | return retval; | |
110 | } | |
111 | ||
112 | return 0; | |
113 | } | |
114 | ||
115 | static int rmi_driver_process_config_requests(struct rmi_device *rmi_dev) | |
116 | { | |
117 | struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev); | |
118 | struct rmi_function *entry; | |
119 | int retval; | |
120 | ||
121 | list_for_each_entry(entry, &data->function_list, node) { | |
122 | retval = configure_one_function(entry); | |
123 | if (retval < 0) | |
124 | return retval; | |
125 | } | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
130 | static void process_one_interrupt(struct rmi_driver_data *data, | |
131 | struct rmi_function *fn) | |
132 | { | |
133 | struct rmi_function_handler *fh; | |
134 | ||
135 | if (!fn || !fn->dev.driver) | |
136 | return; | |
137 | ||
138 | fh = to_rmi_function_handler(fn->dev.driver); | |
a1376d3d | 139 | if (fh->attention) { |
2b6a321d AD |
140 | bitmap_and(data->fn_irq_bits, data->irq_status, fn->irq_mask, |
141 | data->irq_count); | |
142 | if (!bitmap_empty(data->fn_irq_bits, data->irq_count)) | |
143 | fh->attention(fn, data->fn_irq_bits); | |
144 | } | |
145 | } | |
146 | ||
3aeed5b5 | 147 | static int rmi_process_interrupt_requests(struct rmi_device *rmi_dev) |
2b6a321d AD |
148 | { |
149 | struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev); | |
150 | struct device *dev = &rmi_dev->dev; | |
151 | struct rmi_function *entry; | |
152 | int error; | |
153 | ||
154 | if (!data) | |
155 | return 0; | |
156 | ||
ae9979c3 | 157 | if (!data->attn_data.data) { |
2b6a321d AD |
158 | error = rmi_read_block(rmi_dev, |
159 | data->f01_container->fd.data_base_addr + 1, | |
160 | data->irq_status, data->num_of_irq_regs); | |
161 | if (error < 0) { | |
162 | dev_err(dev, "Failed to read irqs, code=%d\n", error); | |
163 | return error; | |
164 | } | |
165 | } | |
166 | ||
167 | mutex_lock(&data->irq_mutex); | |
168 | bitmap_and(data->irq_status, data->irq_status, data->current_irq_mask, | |
169 | data->irq_count); | |
170 | /* | |
171 | * At this point, irq_status has all bits that are set in the | |
172 | * interrupt status register and are enabled. | |
173 | */ | |
174 | mutex_unlock(&data->irq_mutex); | |
175 | ||
176 | /* | |
177 | * It would be nice to be able to use irq_chip to handle these | |
178 | * nested IRQs. Unfortunately, most of the current customers for | |
179 | * this driver are using older kernels (3.0.x) that don't support | |
180 | * the features required for that. Once they've shifted to more | |
181 | * recent kernels (say, 3.3 and higher), this should be switched to | |
182 | * use irq_chip. | |
183 | */ | |
184 | list_for_each_entry(entry, &data->function_list, node) | |
a1376d3d | 185 | process_one_interrupt(data, entry); |
2b6a321d AD |
186 | |
187 | if (data->input) | |
188 | input_sync(data->input); | |
189 | ||
190 | return 0; | |
191 | } | |
3aeed5b5 | 192 | |
b908d3cd BT |
193 | void rmi_set_attn_data(struct rmi_device *rmi_dev, unsigned long irq_status, |
194 | void *data, size_t size) | |
195 | { | |
196 | struct rmi_driver_data *drvdata = dev_get_drvdata(&rmi_dev->dev); | |
197 | struct rmi4_attn_data attn_data; | |
198 | void *fifo_data; | |
199 | ||
200 | if (!drvdata->enabled) | |
201 | return; | |
202 | ||
203 | fifo_data = kmemdup(data, size, GFP_ATOMIC); | |
204 | if (!fifo_data) | |
205 | return; | |
206 | ||
207 | attn_data.irq_status = irq_status; | |
208 | attn_data.size = size; | |
209 | attn_data.data = fifo_data; | |
210 | ||
211 | kfifo_put(&drvdata->attn_fifo, attn_data); | |
212 | } | |
213 | EXPORT_SYMBOL_GPL(rmi_set_attn_data); | |
214 | ||
3aeed5b5 BA |
215 | static irqreturn_t rmi_irq_fn(int irq, void *dev_id) |
216 | { | |
217 | struct rmi_device *rmi_dev = dev_id; | |
b908d3cd BT |
218 | struct rmi_driver_data *drvdata = dev_get_drvdata(&rmi_dev->dev); |
219 | struct rmi4_attn_data attn_data = {0}; | |
220 | int ret, count; | |
221 | ||
222 | count = kfifo_get(&drvdata->attn_fifo, &attn_data); | |
223 | if (count) { | |
224 | *(drvdata->irq_status) = attn_data.irq_status; | |
ae9979c3 | 225 | drvdata->attn_data = attn_data; |
b908d3cd | 226 | } |
3aeed5b5 BA |
227 | |
228 | ret = rmi_process_interrupt_requests(rmi_dev); | |
229 | if (ret) | |
230 | rmi_dbg(RMI_DEBUG_CORE, &rmi_dev->dev, | |
231 | "Failed to process interrupt request: %d\n", ret); | |
232 | ||
b908d3cd BT |
233 | if (count) |
234 | kfree(attn_data.data); | |
235 | ||
236 | if (!kfifo_is_empty(&drvdata->attn_fifo)) | |
237 | return rmi_irq_fn(irq, dev_id); | |
238 | ||
3aeed5b5 BA |
239 | return IRQ_HANDLED; |
240 | } | |
241 | ||
242 | static int rmi_irq_init(struct rmi_device *rmi_dev) | |
243 | { | |
244 | struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev); | |
a64ea311 | 245 | struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev); |
3aeed5b5 BA |
246 | int irq_flags = irq_get_trigger_type(pdata->irq); |
247 | int ret; | |
248 | ||
249 | if (!irq_flags) | |
250 | irq_flags = IRQF_TRIGGER_LOW; | |
251 | ||
252 | ret = devm_request_threaded_irq(&rmi_dev->dev, pdata->irq, NULL, | |
253 | rmi_irq_fn, irq_flags | IRQF_ONESHOT, | |
254 | dev_name(rmi_dev->xport->dev), | |
255 | rmi_dev); | |
256 | if (ret < 0) { | |
257 | dev_err(&rmi_dev->dev, "Failed to register interrupt %d\n", | |
258 | pdata->irq); | |
259 | ||
260 | return ret; | |
261 | } | |
262 | ||
a64ea311 BT |
263 | data->enabled = true; |
264 | ||
3aeed5b5 BA |
265 | return 0; |
266 | } | |
2b6a321d | 267 | |
f32361b7 BT |
268 | struct rmi_function *rmi_find_function(struct rmi_device *rmi_dev, u8 number) |
269 | { | |
270 | struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev); | |
271 | struct rmi_function *entry; | |
272 | ||
273 | list_for_each_entry(entry, &data->function_list, node) { | |
274 | if (entry->fd.function_number == number) | |
275 | return entry; | |
276 | } | |
277 | ||
278 | return NULL; | |
279 | } | |
280 | ||
2b6a321d AD |
281 | static int suspend_one_function(struct rmi_function *fn) |
282 | { | |
283 | struct rmi_function_handler *fh; | |
284 | int retval = 0; | |
285 | ||
286 | if (!fn || !fn->dev.driver) | |
287 | return 0; | |
288 | ||
289 | fh = to_rmi_function_handler(fn->dev.driver); | |
290 | if (fh->suspend) { | |
291 | retval = fh->suspend(fn); | |
292 | if (retval < 0) | |
293 | dev_err(&fn->dev, "Suspend failed with code %d.\n", | |
294 | retval); | |
295 | } | |
296 | ||
297 | return retval; | |
298 | } | |
299 | ||
300 | static int rmi_suspend_functions(struct rmi_device *rmi_dev) | |
301 | { | |
302 | struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev); | |
303 | struct rmi_function *entry; | |
304 | int retval; | |
305 | ||
306 | list_for_each_entry(entry, &data->function_list, node) { | |
307 | retval = suspend_one_function(entry); | |
308 | if (retval < 0) | |
309 | return retval; | |
310 | } | |
311 | ||
312 | return 0; | |
313 | } | |
314 | ||
315 | static int resume_one_function(struct rmi_function *fn) | |
316 | { | |
317 | struct rmi_function_handler *fh; | |
318 | int retval = 0; | |
319 | ||
320 | if (!fn || !fn->dev.driver) | |
321 | return 0; | |
322 | ||
323 | fh = to_rmi_function_handler(fn->dev.driver); | |
324 | if (fh->resume) { | |
325 | retval = fh->resume(fn); | |
326 | if (retval < 0) | |
327 | dev_err(&fn->dev, "Resume failed with code %d.\n", | |
328 | retval); | |
329 | } | |
330 | ||
331 | return retval; | |
332 | } | |
333 | ||
334 | static int rmi_resume_functions(struct rmi_device *rmi_dev) | |
335 | { | |
336 | struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev); | |
337 | struct rmi_function *entry; | |
338 | int retval; | |
339 | ||
340 | list_for_each_entry(entry, &data->function_list, node) { | |
341 | retval = resume_one_function(entry); | |
342 | if (retval < 0) | |
343 | return retval; | |
344 | } | |
345 | ||
346 | return 0; | |
347 | } | |
348 | ||
29fd0ec2 | 349 | int rmi_enable_sensor(struct rmi_device *rmi_dev) |
2b6a321d AD |
350 | { |
351 | int retval = 0; | |
352 | ||
353 | retval = rmi_driver_process_config_requests(rmi_dev); | |
354 | if (retval < 0) | |
355 | return retval; | |
356 | ||
357 | return rmi_process_interrupt_requests(rmi_dev); | |
358 | } | |
359 | ||
360 | /** | |
361 | * rmi_driver_set_input_params - set input device id and other data. | |
362 | * | |
363 | * @rmi_dev: Pointer to an RMI device | |
364 | * @input: Pointer to input device | |
365 | * | |
366 | */ | |
367 | static int rmi_driver_set_input_params(struct rmi_device *rmi_dev, | |
368 | struct input_dev *input) | |
369 | { | |
370 | input->name = SYNAPTICS_INPUT_DEVICE_NAME; | |
371 | input->id.vendor = SYNAPTICS_VENDOR_ID; | |
372 | input->id.bustype = BUS_RMI; | |
373 | return 0; | |
374 | } | |
375 | ||
376 | static void rmi_driver_set_input_name(struct rmi_device *rmi_dev, | |
377 | struct input_dev *input) | |
378 | { | |
379 | struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev); | |
ce363f0d | 380 | const char *device_name = rmi_f01_get_product_ID(data->f01_container); |
2b6a321d AD |
381 | char *name; |
382 | ||
383 | name = devm_kasprintf(&rmi_dev->dev, GFP_KERNEL, | |
384 | "Synaptics %s", device_name); | |
385 | if (!name) | |
386 | return; | |
387 | ||
388 | input->name = name; | |
389 | } | |
390 | ||
391 | static int rmi_driver_set_irq_bits(struct rmi_device *rmi_dev, | |
392 | unsigned long *mask) | |
393 | { | |
394 | int error = 0; | |
395 | struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev); | |
396 | struct device *dev = &rmi_dev->dev; | |
397 | ||
398 | mutex_lock(&data->irq_mutex); | |
399 | bitmap_or(data->new_irq_mask, | |
400 | data->current_irq_mask, mask, data->irq_count); | |
401 | ||
402 | error = rmi_write_block(rmi_dev, | |
403 | data->f01_container->fd.control_base_addr + 1, | |
404 | data->new_irq_mask, data->num_of_irq_regs); | |
405 | if (error < 0) { | |
406 | dev_err(dev, "%s: Failed to change enabled interrupts!", | |
407 | __func__); | |
408 | goto error_unlock; | |
409 | } | |
410 | bitmap_copy(data->current_irq_mask, data->new_irq_mask, | |
411 | data->num_of_irq_regs); | |
412 | ||
413 | error_unlock: | |
414 | mutex_unlock(&data->irq_mutex); | |
415 | return error; | |
416 | } | |
417 | ||
418 | static int rmi_driver_clear_irq_bits(struct rmi_device *rmi_dev, | |
419 | unsigned long *mask) | |
420 | { | |
421 | int error = 0; | |
422 | struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev); | |
423 | struct device *dev = &rmi_dev->dev; | |
424 | ||
425 | mutex_lock(&data->irq_mutex); | |
426 | bitmap_andnot(data->new_irq_mask, | |
427 | data->current_irq_mask, mask, data->irq_count); | |
428 | ||
429 | error = rmi_write_block(rmi_dev, | |
430 | data->f01_container->fd.control_base_addr + 1, | |
431 | data->new_irq_mask, data->num_of_irq_regs); | |
432 | if (error < 0) { | |
433 | dev_err(dev, "%s: Failed to change enabled interrupts!", | |
434 | __func__); | |
435 | goto error_unlock; | |
436 | } | |
437 | bitmap_copy(data->current_irq_mask, data->new_irq_mask, | |
438 | data->num_of_irq_regs); | |
439 | ||
440 | error_unlock: | |
441 | mutex_unlock(&data->irq_mutex); | |
442 | return error; | |
443 | } | |
444 | ||
445 | static int rmi_driver_reset_handler(struct rmi_device *rmi_dev) | |
446 | { | |
447 | struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev); | |
448 | int error; | |
449 | ||
450 | /* | |
451 | * Can get called before the driver is fully ready to deal with | |
452 | * this situation. | |
453 | */ | |
454 | if (!data || !data->f01_container) { | |
455 | dev_warn(&rmi_dev->dev, | |
456 | "Not ready to handle reset yet!\n"); | |
457 | return 0; | |
458 | } | |
459 | ||
460 | error = rmi_read_block(rmi_dev, | |
461 | data->f01_container->fd.control_base_addr + 1, | |
462 | data->current_irq_mask, data->num_of_irq_regs); | |
463 | if (error < 0) { | |
464 | dev_err(&rmi_dev->dev, "%s: Failed to read current IRQ mask.\n", | |
465 | __func__); | |
466 | return error; | |
467 | } | |
468 | ||
469 | error = rmi_driver_process_reset_requests(rmi_dev); | |
470 | if (error < 0) | |
471 | return error; | |
472 | ||
473 | error = rmi_driver_process_config_requests(rmi_dev); | |
474 | if (error < 0) | |
475 | return error; | |
476 | ||
477 | return 0; | |
478 | } | |
479 | ||
e9dade41 BT |
480 | static int rmi_read_pdt_entry(struct rmi_device *rmi_dev, |
481 | struct pdt_entry *entry, u16 pdt_address) | |
2b6a321d AD |
482 | { |
483 | u8 buf[RMI_PDT_ENTRY_SIZE]; | |
484 | int error; | |
485 | ||
486 | error = rmi_read_block(rmi_dev, pdt_address, buf, RMI_PDT_ENTRY_SIZE); | |
487 | if (error) { | |
488 | dev_err(&rmi_dev->dev, "Read PDT entry at %#06x failed, code: %d.\n", | |
489 | pdt_address, error); | |
490 | return error; | |
491 | } | |
492 | ||
493 | entry->page_start = pdt_address & RMI4_PAGE_MASK; | |
494 | entry->query_base_addr = buf[0]; | |
495 | entry->command_base_addr = buf[1]; | |
496 | entry->control_base_addr = buf[2]; | |
497 | entry->data_base_addr = buf[3]; | |
498 | entry->interrupt_source_count = buf[4] & RMI_PDT_INT_SOURCE_COUNT_MASK; | |
499 | entry->function_version = (buf[4] & RMI_PDT_FUNCTION_VERSION_MASK) >> 5; | |
500 | entry->function_number = buf[5]; | |
501 | ||
502 | return 0; | |
503 | } | |
2b6a321d AD |
504 | |
505 | static void rmi_driver_copy_pdt_to_fd(const struct pdt_entry *pdt, | |
506 | struct rmi_function_descriptor *fd) | |
507 | { | |
508 | fd->query_base_addr = pdt->query_base_addr + pdt->page_start; | |
509 | fd->command_base_addr = pdt->command_base_addr + pdt->page_start; | |
510 | fd->control_base_addr = pdt->control_base_addr + pdt->page_start; | |
511 | fd->data_base_addr = pdt->data_base_addr + pdt->page_start; | |
512 | fd->function_number = pdt->function_number; | |
513 | fd->interrupt_source_count = pdt->interrupt_source_count; | |
514 | fd->function_version = pdt->function_version; | |
515 | } | |
516 | ||
517 | #define RMI_SCAN_CONTINUE 0 | |
518 | #define RMI_SCAN_DONE 1 | |
519 | ||
520 | static int rmi_scan_pdt_page(struct rmi_device *rmi_dev, | |
521 | int page, | |
ad338e8b | 522 | int *empty_pages, |
2b6a321d AD |
523 | void *ctx, |
524 | int (*callback)(struct rmi_device *rmi_dev, | |
525 | void *ctx, | |
526 | const struct pdt_entry *entry)) | |
527 | { | |
528 | struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev); | |
529 | struct pdt_entry pdt_entry; | |
530 | u16 page_start = RMI4_PAGE_SIZE * page; | |
531 | u16 pdt_start = page_start + PDT_START_SCAN_LOCATION; | |
532 | u16 pdt_end = page_start + PDT_END_SCAN_LOCATION; | |
533 | u16 addr; | |
534 | int error; | |
535 | int retval; | |
536 | ||
537 | for (addr = pdt_start; addr >= pdt_end; addr -= RMI_PDT_ENTRY_SIZE) { | |
538 | error = rmi_read_pdt_entry(rmi_dev, &pdt_entry, addr); | |
539 | if (error) | |
540 | return error; | |
541 | ||
542 | if (RMI4_END_OF_PDT(pdt_entry.function_number)) | |
543 | break; | |
544 | ||
545 | retval = callback(rmi_dev, ctx, &pdt_entry); | |
546 | if (retval != RMI_SCAN_CONTINUE) | |
547 | return retval; | |
548 | } | |
549 | ||
ad338e8b ND |
550 | /* |
551 | * Count number of empty PDT pages. If a gap of two pages | |
552 | * or more is found, stop scanning. | |
553 | */ | |
554 | if (addr == pdt_start) | |
555 | ++*empty_pages; | |
556 | else | |
557 | *empty_pages = 0; | |
558 | ||
5191d88a | 559 | return (data->bootloader_mode || *empty_pages >= 2) ? |
2b6a321d AD |
560 | RMI_SCAN_DONE : RMI_SCAN_CONTINUE; |
561 | } | |
562 | ||
29fd0ec2 ND |
563 | int rmi_scan_pdt(struct rmi_device *rmi_dev, void *ctx, |
564 | int (*callback)(struct rmi_device *rmi_dev, | |
565 | void *ctx, const struct pdt_entry *entry)) | |
2b6a321d AD |
566 | { |
567 | int page; | |
ad338e8b | 568 | int empty_pages = 0; |
2b6a321d AD |
569 | int retval = RMI_SCAN_DONE; |
570 | ||
571 | for (page = 0; page <= RMI4_MAX_PAGE; page++) { | |
ad338e8b ND |
572 | retval = rmi_scan_pdt_page(rmi_dev, page, &empty_pages, |
573 | ctx, callback); | |
2b6a321d AD |
574 | if (retval != RMI_SCAN_CONTINUE) |
575 | break; | |
576 | } | |
577 | ||
578 | return retval < 0 ? retval : 0; | |
579 | } | |
580 | ||
581 | int rmi_read_register_desc(struct rmi_device *d, u16 addr, | |
582 | struct rmi_register_descriptor *rdesc) | |
583 | { | |
584 | int ret; | |
585 | u8 size_presence_reg; | |
586 | u8 buf[35]; | |
587 | int presense_offset = 1; | |
588 | u8 *struct_buf; | |
589 | int reg; | |
590 | int offset = 0; | |
591 | int map_offset = 0; | |
592 | int i; | |
593 | int b; | |
594 | ||
595 | /* | |
596 | * The first register of the register descriptor is the size of | |
597 | * the register descriptor's presense register. | |
598 | */ | |
599 | ret = rmi_read(d, addr, &size_presence_reg); | |
600 | if (ret) | |
601 | return ret; | |
602 | ++addr; | |
603 | ||
604 | if (size_presence_reg < 0 || size_presence_reg > 35) | |
605 | return -EIO; | |
606 | ||
607 | memset(buf, 0, sizeof(buf)); | |
608 | ||
609 | /* | |
610 | * The presence register contains the size of the register structure | |
611 | * and a bitmap which identified which packet registers are present | |
612 | * for this particular register type (ie query, control, or data). | |
613 | */ | |
614 | ret = rmi_read_block(d, addr, buf, size_presence_reg); | |
615 | if (ret) | |
616 | return ret; | |
617 | ++addr; | |
618 | ||
619 | if (buf[0] == 0) { | |
620 | presense_offset = 3; | |
621 | rdesc->struct_size = buf[1] | (buf[2] << 8); | |
622 | } else { | |
623 | rdesc->struct_size = buf[0]; | |
624 | } | |
625 | ||
626 | for (i = presense_offset; i < size_presence_reg; i++) { | |
627 | for (b = 0; b < 8; b++) { | |
628 | if (buf[i] & (0x1 << b)) | |
629 | bitmap_set(rdesc->presense_map, map_offset, 1); | |
630 | ++map_offset; | |
631 | } | |
632 | } | |
633 | ||
634 | rdesc->num_registers = bitmap_weight(rdesc->presense_map, | |
635 | RMI_REG_DESC_PRESENSE_BITS); | |
636 | ||
637 | rdesc->registers = devm_kzalloc(&d->dev, rdesc->num_registers * | |
638 | sizeof(struct rmi_register_desc_item), | |
639 | GFP_KERNEL); | |
640 | if (!rdesc->registers) | |
641 | return -ENOMEM; | |
642 | ||
643 | /* | |
644 | * Allocate a temporary buffer to hold the register structure. | |
645 | * I'm not using devm_kzalloc here since it will not be retained | |
646 | * after exiting this function | |
647 | */ | |
648 | struct_buf = kzalloc(rdesc->struct_size, GFP_KERNEL); | |
649 | if (!struct_buf) | |
650 | return -ENOMEM; | |
651 | ||
652 | /* | |
653 | * The register structure contains information about every packet | |
654 | * register of this type. This includes the size of the packet | |
655 | * register and a bitmap of all subpackets contained in the packet | |
656 | * register. | |
657 | */ | |
658 | ret = rmi_read_block(d, addr, struct_buf, rdesc->struct_size); | |
659 | if (ret) | |
660 | goto free_struct_buff; | |
661 | ||
662 | reg = find_first_bit(rdesc->presense_map, RMI_REG_DESC_PRESENSE_BITS); | |
2b6a321d AD |
663 | for (i = 0; i < rdesc->num_registers; i++) { |
664 | struct rmi_register_desc_item *item = &rdesc->registers[i]; | |
665 | int reg_size = struct_buf[offset]; | |
666 | ||
667 | ++offset; | |
668 | if (reg_size == 0) { | |
669 | reg_size = struct_buf[offset] | | |
670 | (struct_buf[offset + 1] << 8); | |
671 | offset += 2; | |
672 | } | |
673 | ||
674 | if (reg_size == 0) { | |
675 | reg_size = struct_buf[offset] | | |
676 | (struct_buf[offset + 1] << 8) | | |
677 | (struct_buf[offset + 2] << 16) | | |
678 | (struct_buf[offset + 3] << 24); | |
679 | offset += 4; | |
680 | } | |
681 | ||
682 | item->reg = reg; | |
683 | item->reg_size = reg_size; | |
684 | ||
3e29d6bb AD |
685 | map_offset = 0; |
686 | ||
2b6a321d AD |
687 | do { |
688 | for (b = 0; b < 7; b++) { | |
689 | if (struct_buf[offset] & (0x1 << b)) | |
690 | bitmap_set(item->subpacket_map, | |
691 | map_offset, 1); | |
692 | ++map_offset; | |
693 | } | |
694 | } while (struct_buf[offset++] & 0x80); | |
695 | ||
696 | item->num_subpackets = bitmap_weight(item->subpacket_map, | |
697 | RMI_REG_DESC_SUBPACKET_BITS); | |
698 | ||
699 | rmi_dbg(RMI_DEBUG_CORE, &d->dev, | |
700 | "%s: reg: %d reg size: %ld subpackets: %d\n", __func__, | |
701 | item->reg, item->reg_size, item->num_subpackets); | |
702 | ||
703 | reg = find_next_bit(rdesc->presense_map, | |
704 | RMI_REG_DESC_PRESENSE_BITS, reg + 1); | |
705 | } | |
706 | ||
707 | free_struct_buff: | |
708 | kfree(struct_buf); | |
709 | return ret; | |
710 | } | |
2b6a321d AD |
711 | |
712 | const struct rmi_register_desc_item *rmi_get_register_desc_item( | |
713 | struct rmi_register_descriptor *rdesc, u16 reg) | |
714 | { | |
715 | const struct rmi_register_desc_item *item; | |
716 | int i; | |
717 | ||
718 | for (i = 0; i < rdesc->num_registers; i++) { | |
719 | item = &rdesc->registers[i]; | |
720 | if (item->reg == reg) | |
721 | return item; | |
722 | } | |
723 | ||
724 | return NULL; | |
725 | } | |
2b6a321d AD |
726 | |
727 | size_t rmi_register_desc_calc_size(struct rmi_register_descriptor *rdesc) | |
728 | { | |
729 | const struct rmi_register_desc_item *item; | |
730 | int i; | |
731 | size_t size = 0; | |
732 | ||
733 | for (i = 0; i < rdesc->num_registers; i++) { | |
734 | item = &rdesc->registers[i]; | |
735 | size += item->reg_size; | |
736 | } | |
737 | return size; | |
738 | } | |
2b6a321d AD |
739 | |
740 | /* Compute the register offset relative to the base address */ | |
741 | int rmi_register_desc_calc_reg_offset( | |
742 | struct rmi_register_descriptor *rdesc, u16 reg) | |
743 | { | |
744 | const struct rmi_register_desc_item *item; | |
745 | int offset = 0; | |
746 | int i; | |
747 | ||
748 | for (i = 0; i < rdesc->num_registers; i++) { | |
749 | item = &rdesc->registers[i]; | |
750 | if (item->reg == reg) | |
751 | return offset; | |
752 | ++offset; | |
753 | } | |
754 | return -1; | |
755 | } | |
2b6a321d AD |
756 | |
757 | bool rmi_register_desc_has_subpacket(const struct rmi_register_desc_item *item, | |
758 | u8 subpacket) | |
759 | { | |
760 | return find_next_bit(item->subpacket_map, RMI_REG_DESC_PRESENSE_BITS, | |
761 | subpacket) == subpacket; | |
762 | } | |
763 | ||
2b6a321d AD |
764 | static int rmi_check_bootloader_mode(struct rmi_device *rmi_dev, |
765 | const struct pdt_entry *pdt) | |
766 | { | |
5191d88a ND |
767 | struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev); |
768 | int ret; | |
769 | u8 status; | |
2b6a321d | 770 | |
5191d88a ND |
771 | if (pdt->function_number == 0x34 && pdt->function_version > 1) { |
772 | ret = rmi_read(rmi_dev, pdt->data_base_addr, &status); | |
773 | if (ret) { | |
774 | dev_err(&rmi_dev->dev, | |
775 | "Failed to read F34 status: %d.\n", ret); | |
776 | return ret; | |
777 | } | |
778 | ||
779 | if (status & BIT(7)) | |
780 | data->bootloader_mode = true; | |
781 | } else if (pdt->function_number == 0x01) { | |
782 | ret = rmi_read(rmi_dev, pdt->data_base_addr, &status); | |
783 | if (ret) { | |
784 | dev_err(&rmi_dev->dev, | |
785 | "Failed to read F01 status: %d.\n", ret); | |
786 | return ret; | |
787 | } | |
788 | ||
789 | if (status & BIT(6)) | |
790 | data->bootloader_mode = true; | |
2b6a321d AD |
791 | } |
792 | ||
5191d88a | 793 | return 0; |
2b6a321d AD |
794 | } |
795 | ||
796 | static int rmi_count_irqs(struct rmi_device *rmi_dev, | |
797 | void *ctx, const struct pdt_entry *pdt) | |
798 | { | |
2b6a321d | 799 | int *irq_count = ctx; |
5191d88a | 800 | int ret; |
2b6a321d AD |
801 | |
802 | *irq_count += pdt->interrupt_source_count; | |
5191d88a ND |
803 | |
804 | ret = rmi_check_bootloader_mode(rmi_dev, pdt); | |
805 | if (ret < 0) | |
806 | return ret; | |
2b6a321d AD |
807 | |
808 | return RMI_SCAN_CONTINUE; | |
809 | } | |
810 | ||
29fd0ec2 ND |
811 | int rmi_initial_reset(struct rmi_device *rmi_dev, void *ctx, |
812 | const struct pdt_entry *pdt) | |
2b6a321d AD |
813 | { |
814 | int error; | |
815 | ||
816 | if (pdt->function_number == 0x01) { | |
817 | u16 cmd_addr = pdt->page_start + pdt->command_base_addr; | |
818 | u8 cmd_buf = RMI_DEVICE_RESET_CMD; | |
819 | const struct rmi_device_platform_data *pdata = | |
820 | rmi_get_platform_data(rmi_dev); | |
821 | ||
822 | if (rmi_dev->xport->ops->reset) { | |
823 | error = rmi_dev->xport->ops->reset(rmi_dev->xport, | |
824 | cmd_addr); | |
825 | if (error) | |
826 | return error; | |
827 | ||
828 | return RMI_SCAN_DONE; | |
829 | } | |
830 | ||
8029a283 | 831 | rmi_dbg(RMI_DEBUG_CORE, &rmi_dev->dev, "Sending reset\n"); |
2b6a321d AD |
832 | error = rmi_write_block(rmi_dev, cmd_addr, &cmd_buf, 1); |
833 | if (error) { | |
834 | dev_err(&rmi_dev->dev, | |
835 | "Initial reset failed. Code = %d.\n", error); | |
836 | return error; | |
837 | } | |
838 | ||
839 | mdelay(pdata->reset_delay_ms ?: DEFAULT_RESET_DELAY_MS); | |
840 | ||
841 | return RMI_SCAN_DONE; | |
842 | } | |
843 | ||
844 | /* F01 should always be on page 0. If we don't find it there, fail. */ | |
845 | return pdt->page_start == 0 ? RMI_SCAN_CONTINUE : -ENODEV; | |
846 | } | |
847 | ||
848 | static int rmi_create_function(struct rmi_device *rmi_dev, | |
849 | void *ctx, const struct pdt_entry *pdt) | |
850 | { | |
851 | struct device *dev = &rmi_dev->dev; | |
ed77bdf4 | 852 | struct rmi_driver_data *data = dev_get_drvdata(dev); |
2b6a321d AD |
853 | int *current_irq_count = ctx; |
854 | struct rmi_function *fn; | |
855 | int i; | |
856 | int error; | |
857 | ||
858 | rmi_dbg(RMI_DEBUG_CORE, dev, "Initializing F%02X.\n", | |
859 | pdt->function_number); | |
860 | ||
861 | fn = kzalloc(sizeof(struct rmi_function) + | |
862 | BITS_TO_LONGS(data->irq_count) * sizeof(unsigned long), | |
863 | GFP_KERNEL); | |
864 | if (!fn) { | |
865 | dev_err(dev, "Failed to allocate memory for F%02X\n", | |
866 | pdt->function_number); | |
867 | return -ENOMEM; | |
868 | } | |
869 | ||
870 | INIT_LIST_HEAD(&fn->node); | |
871 | rmi_driver_copy_pdt_to_fd(pdt, &fn->fd); | |
872 | ||
873 | fn->rmi_dev = rmi_dev; | |
874 | ||
875 | fn->num_of_irqs = pdt->interrupt_source_count; | |
876 | fn->irq_pos = *current_irq_count; | |
877 | *current_irq_count += fn->num_of_irqs; | |
878 | ||
879 | for (i = 0; i < fn->num_of_irqs; i++) | |
880 | set_bit(fn->irq_pos + i, fn->irq_mask); | |
881 | ||
882 | error = rmi_register_function(fn); | |
883 | if (error) | |
884 | goto err_put_fn; | |
885 | ||
886 | if (pdt->function_number == 0x01) | |
887 | data->f01_container = fn; | |
29fd0ec2 ND |
888 | else if (pdt->function_number == 0x34) |
889 | data->f34_container = fn; | |
2b6a321d AD |
890 | |
891 | list_add_tail(&fn->node, &data->function_list); | |
892 | ||
893 | return RMI_SCAN_CONTINUE; | |
894 | ||
895 | err_put_fn: | |
896 | put_device(&fn->dev); | |
897 | return error; | |
898 | } | |
899 | ||
a64ea311 | 900 | void rmi_enable_irq(struct rmi_device *rmi_dev, bool clear_wake) |
2b6a321d | 901 | { |
3aeed5b5 | 902 | struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev); |
a64ea311 | 903 | struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev); |
3aeed5b5 | 904 | int irq = pdata->irq; |
a64ea311 BT |
905 | int irq_flags; |
906 | int retval; | |
2b6a321d | 907 | |
a64ea311 BT |
908 | mutex_lock(&data->enabled_mutex); |
909 | ||
910 | if (data->enabled) | |
911 | goto out; | |
912 | ||
913 | enable_irq(irq); | |
914 | data->enabled = true; | |
915 | if (clear_wake && device_may_wakeup(rmi_dev->xport->dev)) { | |
916 | retval = disable_irq_wake(irq); | |
917 | if (!retval) | |
918 | dev_warn(&rmi_dev->dev, | |
919 | "Failed to disable irq for wake: %d\n", | |
920 | retval); | |
921 | } | |
922 | ||
923 | /* | |
924 | * Call rmi_process_interrupt_requests() after enabling irq, | |
925 | * otherwise we may lose interrupt on edge-triggered systems. | |
926 | */ | |
927 | irq_flags = irq_get_trigger_type(pdata->irq); | |
928 | if (irq_flags & IRQ_TYPE_EDGE_BOTH) | |
929 | rmi_process_interrupt_requests(rmi_dev); | |
930 | ||
931 | out: | |
932 | mutex_unlock(&data->enabled_mutex); | |
933 | } | |
934 | ||
935 | void rmi_disable_irq(struct rmi_device *rmi_dev, bool enable_wake) | |
936 | { | |
937 | struct rmi_device_platform_data *pdata = rmi_get_platform_data(rmi_dev); | |
938 | struct rmi_driver_data *data = dev_get_drvdata(&rmi_dev->dev); | |
b908d3cd | 939 | struct rmi4_attn_data attn_data = {0}; |
a64ea311 | 940 | int irq = pdata->irq; |
b908d3cd | 941 | int retval, count; |
a64ea311 BT |
942 | |
943 | mutex_lock(&data->enabled_mutex); | |
944 | ||
945 | if (!data->enabled) | |
946 | goto out; | |
2b6a321d | 947 | |
a64ea311 | 948 | data->enabled = false; |
3aeed5b5 BA |
949 | disable_irq(irq); |
950 | if (enable_wake && device_may_wakeup(rmi_dev->xport->dev)) { | |
951 | retval = enable_irq_wake(irq); | |
952 | if (!retval) | |
953 | dev_warn(&rmi_dev->dev, | |
954 | "Failed to enable irq for wake: %d\n", | |
955 | retval); | |
956 | } | |
a64ea311 | 957 | |
b908d3cd BT |
958 | /* make sure the fifo is clean */ |
959 | while (!kfifo_is_empty(&data->attn_fifo)) { | |
960 | count = kfifo_get(&data->attn_fifo, &attn_data); | |
961 | if (count) | |
962 | kfree(attn_data.data); | |
963 | } | |
964 | ||
a64ea311 BT |
965 | out: |
966 | mutex_unlock(&data->enabled_mutex); | |
967 | } | |
968 | ||
969 | int rmi_driver_suspend(struct rmi_device *rmi_dev, bool enable_wake) | |
970 | { | |
971 | int retval; | |
2b6a321d AD |
972 | |
973 | retval = rmi_suspend_functions(rmi_dev); | |
974 | if (retval) | |
975 | dev_warn(&rmi_dev->dev, "Failed to suspend functions: %d\n", | |
976 | retval); | |
977 | ||
a64ea311 | 978 | rmi_disable_irq(rmi_dev, enable_wake); |
2b6a321d AD |
979 | return retval; |
980 | } | |
981 | EXPORT_SYMBOL_GPL(rmi_driver_suspend); | |
982 | ||
3aeed5b5 | 983 | int rmi_driver_resume(struct rmi_device *rmi_dev, bool clear_wake) |
2b6a321d AD |
984 | { |
985 | int retval; | |
986 | ||
a64ea311 | 987 | rmi_enable_irq(rmi_dev, clear_wake); |
3aeed5b5 | 988 | |
2b6a321d AD |
989 | retval = rmi_resume_functions(rmi_dev); |
990 | if (retval) | |
991 | dev_warn(&rmi_dev->dev, "Failed to suspend functions: %d\n", | |
992 | retval); | |
993 | ||
994 | return retval; | |
995 | } | |
996 | EXPORT_SYMBOL_GPL(rmi_driver_resume); | |
997 | ||
998 | static int rmi_driver_remove(struct device *dev) | |
999 | { | |
1000 | struct rmi_device *rmi_dev = to_rmi_device(dev); | |
1001 | ||
a64ea311 | 1002 | rmi_disable_irq(rmi_dev, false); |
2b6a321d | 1003 | |
29fd0ec2 | 1004 | rmi_f34_remove_sysfs(rmi_dev); |
2b6a321d AD |
1005 | rmi_free_function_list(rmi_dev); |
1006 | ||
1007 | return 0; | |
1008 | } | |
1009 | ||
d8a8b3ed AD |
1010 | #ifdef CONFIG_OF |
1011 | static int rmi_driver_of_probe(struct device *dev, | |
1012 | struct rmi_device_platform_data *pdata) | |
1013 | { | |
1014 | int retval; | |
1015 | ||
1016 | retval = rmi_of_property_read_u32(dev, &pdata->reset_delay_ms, | |
1017 | "syna,reset-delay-ms", 1); | |
1018 | if (retval) | |
1019 | return retval; | |
1020 | ||
1021 | return 0; | |
1022 | } | |
1023 | #else | |
1024 | static inline int rmi_driver_of_probe(struct device *dev, | |
1025 | struct rmi_device_platform_data *pdata) | |
1026 | { | |
1027 | return -ENODEV; | |
1028 | } | |
1029 | #endif | |
1030 | ||
29fd0ec2 | 1031 | int rmi_probe_interrupts(struct rmi_driver_data *data) |
6bd0dcfa ND |
1032 | { |
1033 | struct rmi_device *rmi_dev = data->rmi_dev; | |
1034 | struct device *dev = &rmi_dev->dev; | |
1035 | int irq_count; | |
1036 | size_t size; | |
6bd0dcfa ND |
1037 | int retval; |
1038 | ||
1039 | /* | |
1040 | * We need to count the IRQs and allocate their storage before scanning | |
1041 | * the PDT and creating the function entries, because adding a new | |
1042 | * function can trigger events that result in the IRQ related storage | |
1043 | * being accessed. | |
1044 | */ | |
1045 | rmi_dbg(RMI_DEBUG_CORE, dev, "%s: Counting IRQs.\n", __func__); | |
1046 | irq_count = 0; | |
5191d88a ND |
1047 | data->bootloader_mode = false; |
1048 | ||
6bd0dcfa ND |
1049 | retval = rmi_scan_pdt(rmi_dev, &irq_count, rmi_count_irqs); |
1050 | if (retval < 0) { | |
1051 | dev_err(dev, "IRQ counting failed with code %d.\n", retval); | |
1052 | return retval; | |
1053 | } | |
29fd0ec2 | 1054 | |
5191d88a | 1055 | if (data->bootloader_mode) |
ed77bdf4 | 1056 | dev_warn(dev, "Device in bootloader mode.\n"); |
29fd0ec2 | 1057 | |
6bd0dcfa ND |
1058 | data->irq_count = irq_count; |
1059 | data->num_of_irq_regs = (data->irq_count + 7) / 8; | |
1060 | ||
1061 | size = BITS_TO_LONGS(data->irq_count) * sizeof(unsigned long); | |
29fd0ec2 ND |
1062 | data->irq_memory = devm_kzalloc(dev, size * 4, GFP_KERNEL); |
1063 | if (!data->irq_memory) { | |
6bd0dcfa ND |
1064 | dev_err(dev, "Failed to allocate memory for irq masks.\n"); |
1065 | return retval; | |
1066 | } | |
1067 | ||
29fd0ec2 ND |
1068 | data->irq_status = data->irq_memory + size * 0; |
1069 | data->fn_irq_bits = data->irq_memory + size * 1; | |
1070 | data->current_irq_mask = data->irq_memory + size * 2; | |
1071 | data->new_irq_mask = data->irq_memory + size * 3; | |
6bd0dcfa ND |
1072 | |
1073 | return retval; | |
1074 | } | |
1075 | ||
29fd0ec2 | 1076 | int rmi_init_functions(struct rmi_driver_data *data) |
6bd0dcfa ND |
1077 | { |
1078 | struct rmi_device *rmi_dev = data->rmi_dev; | |
1079 | struct device *dev = &rmi_dev->dev; | |
1080 | int irq_count; | |
1081 | int retval; | |
1082 | ||
1083 | irq_count = 0; | |
1084 | rmi_dbg(RMI_DEBUG_CORE, dev, "%s: Creating functions.\n", __func__); | |
1085 | retval = rmi_scan_pdt(rmi_dev, &irq_count, rmi_create_function); | |
1086 | if (retval < 0) { | |
1087 | dev_err(dev, "Function creation failed with code %d.\n", | |
1088 | retval); | |
1089 | goto err_destroy_functions; | |
1090 | } | |
1091 | ||
1092 | if (!data->f01_container) { | |
1093 | dev_err(dev, "Missing F01 container!\n"); | |
1094 | retval = -EINVAL; | |
1095 | goto err_destroy_functions; | |
1096 | } | |
1097 | ||
1098 | retval = rmi_read_block(rmi_dev, | |
1099 | data->f01_container->fd.control_base_addr + 1, | |
1100 | data->current_irq_mask, data->num_of_irq_regs); | |
1101 | if (retval < 0) { | |
1102 | dev_err(dev, "%s: Failed to read current IRQ mask.\n", | |
1103 | __func__); | |
1104 | goto err_destroy_functions; | |
1105 | } | |
1106 | ||
1107 | return 0; | |
1108 | ||
1109 | err_destroy_functions: | |
1110 | rmi_free_function_list(rmi_dev); | |
1111 | return retval; | |
1112 | } | |
1113 | ||
2b6a321d AD |
1114 | static int rmi_driver_probe(struct device *dev) |
1115 | { | |
1116 | struct rmi_driver *rmi_driver; | |
1117 | struct rmi_driver_data *data; | |
1118 | struct rmi_device_platform_data *pdata; | |
1119 | struct rmi_device *rmi_dev; | |
2b6a321d AD |
1120 | int retval; |
1121 | ||
1122 | rmi_dbg(RMI_DEBUG_CORE, dev, "%s: Starting probe.\n", | |
1123 | __func__); | |
1124 | ||
1125 | if (!rmi_is_physical_device(dev)) { | |
1126 | rmi_dbg(RMI_DEBUG_CORE, dev, "Not a physical device.\n"); | |
1127 | return -ENODEV; | |
1128 | } | |
1129 | ||
1130 | rmi_dev = to_rmi_device(dev); | |
1131 | rmi_driver = to_rmi_driver(dev->driver); | |
1132 | rmi_dev->driver = rmi_driver; | |
1133 | ||
1134 | pdata = rmi_get_platform_data(rmi_dev); | |
1135 | ||
d8a8b3ed AD |
1136 | if (rmi_dev->xport->dev->of_node) { |
1137 | retval = rmi_driver_of_probe(rmi_dev->xport->dev, pdata); | |
1138 | if (retval) | |
1139 | return retval; | |
1140 | } | |
1141 | ||
2b6a321d AD |
1142 | data = devm_kzalloc(dev, sizeof(struct rmi_driver_data), GFP_KERNEL); |
1143 | if (!data) | |
1144 | return -ENOMEM; | |
1145 | ||
1146 | INIT_LIST_HEAD(&data->function_list); | |
1147 | data->rmi_dev = rmi_dev; | |
1148 | dev_set_drvdata(&rmi_dev->dev, data); | |
1149 | ||
1150 | /* | |
1151 | * Right before a warm boot, the sensor might be in some unusual state, | |
1152 | * such as F54 diagnostics, or F34 bootloader mode after a firmware | |
1153 | * or configuration update. In order to clear the sensor to a known | |
1154 | * state and/or apply any updates, we issue a initial reset to clear any | |
1155 | * previous settings and force it into normal operation. | |
1156 | * | |
1157 | * We have to do this before actually building the PDT because | |
1158 | * the reflash updates (if any) might cause various registers to move | |
1159 | * around. | |
1160 | * | |
1161 | * For a number of reasons, this initial reset may fail to return | |
1162 | * within the specified time, but we'll still be able to bring up the | |
1163 | * driver normally after that failure. This occurs most commonly in | |
1164 | * a cold boot situation (where then firmware takes longer to come up | |
1165 | * than from a warm boot) and the reset_delay_ms in the platform data | |
1166 | * has been set too short to accommodate that. Since the sensor will | |
1167 | * eventually come up and be usable, we don't want to just fail here | |
1168 | * and leave the customer's device unusable. So we warn them, and | |
1169 | * continue processing. | |
1170 | */ | |
1171 | retval = rmi_scan_pdt(rmi_dev, NULL, rmi_initial_reset); | |
1172 | if (retval < 0) | |
1173 | dev_warn(dev, "RMI initial reset failed! Continuing in spite of this.\n"); | |
1174 | ||
1175 | retval = rmi_read(rmi_dev, PDT_PROPERTIES_LOCATION, &data->pdt_props); | |
1176 | if (retval < 0) { | |
1177 | /* | |
1178 | * we'll print out a warning and continue since | |
1179 | * failure to get the PDT properties is not a cause to fail | |
1180 | */ | |
1181 | dev_warn(dev, "Could not read PDT properties from %#06x (code %d). Assuming 0x00.\n", | |
1182 | PDT_PROPERTIES_LOCATION, retval); | |
1183 | } | |
1184 | ||
2b6a321d | 1185 | mutex_init(&data->irq_mutex); |
a64ea311 | 1186 | mutex_init(&data->enabled_mutex); |
2b6a321d | 1187 | |
6bd0dcfa ND |
1188 | retval = rmi_probe_interrupts(data); |
1189 | if (retval) | |
2b6a321d | 1190 | goto err; |
2b6a321d AD |
1191 | |
1192 | if (rmi_dev->xport->input) { | |
1193 | /* | |
1194 | * The transport driver already has an input device. | |
1195 | * In some cases it is preferable to reuse the transport | |
1196 | * devices input device instead of creating a new one here. | |
1197 | * One example is some HID touchpads report "pass-through" | |
1198 | * button events are not reported by rmi registers. | |
1199 | */ | |
1200 | data->input = rmi_dev->xport->input; | |
1201 | } else { | |
1202 | data->input = devm_input_allocate_device(dev); | |
1203 | if (!data->input) { | |
1204 | dev_err(dev, "%s: Failed to allocate input device.\n", | |
1205 | __func__); | |
1206 | retval = -ENOMEM; | |
6bd0dcfa | 1207 | goto err; |
2b6a321d AD |
1208 | } |
1209 | rmi_driver_set_input_params(rmi_dev, data->input); | |
1210 | data->input->phys = devm_kasprintf(dev, GFP_KERNEL, | |
1211 | "%s/input0", dev_name(dev)); | |
1212 | } | |
1213 | ||
6bd0dcfa ND |
1214 | retval = rmi_init_functions(data); |
1215 | if (retval) | |
1216 | goto err; | |
2b6a321d | 1217 | |
29fd0ec2 ND |
1218 | retval = rmi_f34_create_sysfs(rmi_dev); |
1219 | if (retval) | |
1220 | goto err; | |
2b6a321d AD |
1221 | |
1222 | if (data->input) { | |
1223 | rmi_driver_set_input_name(rmi_dev, data->input); | |
1224 | if (!rmi_dev->xport->input) { | |
1225 | if (input_register_device(data->input)) { | |
1226 | dev_err(dev, "%s: Failed to register input device.\n", | |
1227 | __func__); | |
1228 | goto err_destroy_functions; | |
1229 | } | |
1230 | } | |
1231 | } | |
1232 | ||
3aeed5b5 BA |
1233 | retval = rmi_irq_init(rmi_dev); |
1234 | if (retval < 0) | |
1235 | goto err_destroy_functions; | |
1236 | ||
2b6a321d AD |
1237 | if (data->f01_container->dev.driver) |
1238 | /* Driver already bound, so enable ATTN now. */ | |
29fd0ec2 | 1239 | return rmi_enable_sensor(rmi_dev); |
2b6a321d AD |
1240 | |
1241 | return 0; | |
1242 | ||
1243 | err_destroy_functions: | |
1244 | rmi_free_function_list(rmi_dev); | |
1245 | err: | |
1246 | return retval < 0 ? retval : 0; | |
1247 | } | |
1248 | ||
1249 | static struct rmi_driver rmi_physical_driver = { | |
1250 | .driver = { | |
1251 | .owner = THIS_MODULE, | |
1252 | .name = "rmi4_physical", | |
1253 | .bus = &rmi_bus_type, | |
1254 | .probe = rmi_driver_probe, | |
1255 | .remove = rmi_driver_remove, | |
1256 | }, | |
1257 | .reset_handler = rmi_driver_reset_handler, | |
1258 | .clear_irq_bits = rmi_driver_clear_irq_bits, | |
1259 | .set_irq_bits = rmi_driver_set_irq_bits, | |
1260 | .set_input_params = rmi_driver_set_input_params, | |
1261 | }; | |
1262 | ||
1263 | bool rmi_is_physical_driver(struct device_driver *drv) | |
1264 | { | |
1265 | return drv == &rmi_physical_driver.driver; | |
1266 | } | |
1267 | ||
1268 | int __init rmi_register_physical_driver(void) | |
1269 | { | |
1270 | int error; | |
1271 | ||
1272 | error = driver_register(&rmi_physical_driver.driver); | |
1273 | if (error) { | |
1274 | pr_err("%s: driver register failed, code=%d.\n", __func__, | |
1275 | error); | |
1276 | return error; | |
1277 | } | |
1278 | ||
1279 | return 0; | |
1280 | } | |
1281 | ||
1282 | void __exit rmi_unregister_physical_driver(void) | |
1283 | { | |
1284 | driver_unregister(&rmi_physical_driver.driver); | |
1285 | } |