Commit | Line | Data |
---|---|---|
dae5f0af | 1 | // SPDX-License-Identifier: GPL-2.0 |
e29482e8 MN |
2 | /* |
3 | * ACPI helpers for GPIO API | |
4 | * | |
5 | * Copyright (C) 2012, Intel Corporation | |
6 | * Authors: Mathias Nyman <mathias.nyman@linux.intel.com> | |
7 | * Mika Westerberg <mika.westerberg@linux.intel.com> | |
e29482e8 MN |
8 | */ |
9 | ||
380c7ba3 | 10 | #include <linux/acpi.h> |
61f7f7c8 | 11 | #include <linux/dmi.h> |
e29482e8 | 12 | #include <linux/errno.h> |
e29482e8 | 13 | #include <linux/export.h> |
0d1c28a4 | 14 | #include <linux/interrupt.h> |
380c7ba3 | 15 | #include <linux/irq.h> |
473ed7be | 16 | #include <linux/mutex.h> |
354567e6 | 17 | #include <linux/pinctrl/pinctrl.h> |
e29482e8 | 18 | |
380c7ba3 AS |
19 | #include <linux/gpio/consumer.h> |
20 | #include <linux/gpio/driver.h> | |
21 | #include <linux/gpio/machine.h> | |
22 | ||
5ccff852 | 23 | #include "gpiolib.h" |
77cb907a | 24 | #include "gpiolib-acpi.h" |
5ccff852 | 25 | |
61f7f7c8 HG |
26 | static int run_edge_events_on_boot = -1; |
27 | module_param(run_edge_events_on_boot, int, 0444); | |
28 | MODULE_PARM_DESC(run_edge_events_on_boot, | |
29 | "Run edge _AEI event-handlers at boot: 0=no, 1=yes, -1=auto"); | |
30 | ||
2ccb21f5 HG |
31 | static char *ignore_wake; |
32 | module_param(ignore_wake, charp, 0444); | |
33 | MODULE_PARM_DESC(ignore_wake, | |
34 | "controller@pin combos on which to ignore the ACPI wake flag " | |
35 | "ignore_wake=controller@pin[,controller@pin[,...]]"); | |
36 | ||
6b6af7bd ML |
37 | static char *ignore_interrupt; |
38 | module_param(ignore_interrupt, charp, 0444); | |
39 | MODULE_PARM_DESC(ignore_interrupt, | |
40 | "controller@pin combos on which to ignore interrupt " | |
41 | "ignore_interrupt=controller@pin[,controller@pin[,...]]"); | |
42 | ||
2ccb21f5 HG |
43 | struct acpi_gpiolib_dmi_quirk { |
44 | bool no_edge_events_on_boot; | |
45 | char *ignore_wake; | |
6b6af7bd | 46 | char *ignore_interrupt; |
2ccb21f5 | 47 | }; |
aa23ca3d | 48 | |
e59f5e08 HG |
49 | /** |
50 | * struct acpi_gpio_event - ACPI GPIO event handler data | |
51 | * | |
52 | * @node: list-entry of the events list of the struct acpi_gpio_chip | |
53 | * @handle: handle of ACPI method to execute when the IRQ triggers | |
85edcd01 AS |
54 | * @handler: handler function to pass to request_irq() when requesting the IRQ |
55 | * @pin: GPIO pin number on the struct gpio_chip | |
56 | * @irq: Linux IRQ number for the event, for request_irq() / free_irq() | |
57 | * @irqflags: flags to pass to request_irq() when requesting the IRQ | |
e59f5e08 | 58 | * @irq_is_wake: If the ACPI flags indicate the IRQ is a wakeup source |
85edcd01 AS |
59 | * @irq_requested:True if request_irq() has been done |
60 | * @desc: struct gpio_desc for the GPIO pin for this event | |
e59f5e08 | 61 | */ |
4b01a14b | 62 | struct acpi_gpio_event { |
7fc7acb9 | 63 | struct list_head node; |
4b01a14b | 64 | acpi_handle handle; |
e59f5e08 | 65 | irq_handler_t handler; |
7fc7acb9 RW |
66 | unsigned int pin; |
67 | unsigned int irq; | |
e59f5e08 HG |
68 | unsigned long irqflags; |
69 | bool irq_is_wake; | |
70 | bool irq_requested; | |
e46cf32c | 71 | struct gpio_desc *desc; |
7fc7acb9 RW |
72 | }; |
73 | ||
473ed7be MW |
74 | struct acpi_gpio_connection { |
75 | struct list_head node; | |
e46cf32c | 76 | unsigned int pin; |
473ed7be MW |
77 | struct gpio_desc *desc; |
78 | }; | |
79 | ||
aa92b6f6 | 80 | struct acpi_gpio_chip { |
473ed7be MW |
81 | /* |
82 | * ACPICA requires that the first field of the context parameter | |
83 | * passed to acpi_install_address_space_handler() is large enough | |
84 | * to hold struct acpi_connection_info. | |
85 | */ | |
86 | struct acpi_connection_info conn_info; | |
87 | struct list_head conns; | |
88 | struct mutex conn_lock; | |
aa92b6f6 | 89 | struct gpio_chip *chip; |
4b01a14b | 90 | struct list_head events; |
78d3a92e | 91 | struct list_head deferred_req_irqs_list_entry; |
aa92b6f6 MW |
92 | }; |
93 | ||
b7452d67 DT |
94 | /** |
95 | * struct acpi_gpio_info - ACPI GPIO specific information | |
96 | * @adev: reference to ACPI device which consumes GPIO resource | |
97 | * @flags: GPIO initialization flags | |
98 | * @gpioint: if %true this GPIO is of type GpioInt otherwise type is GpioIo | |
99 | * @pin_config: pin bias as provided by ACPI | |
100 | * @polarity: interrupt polarity as provided by ACPI | |
101 | * @triggering: triggering type as provided by ACPI | |
102 | * @wake_capable: wake capability as provided by ACPI | |
103 | * @debounce: debounce timeout as provided by ACPI | |
104 | * @quirks: Linux specific quirks as provided by struct acpi_gpio_mapping | |
105 | */ | |
106 | struct acpi_gpio_info { | |
107 | struct acpi_device *adev; | |
108 | enum gpiod_flags flags; | |
109 | bool gpioint; | |
110 | int pin_config; | |
111 | int polarity; | |
112 | int triggering; | |
113 | bool wake_capable; | |
114 | unsigned int debounce; | |
115 | unsigned int quirks; | |
116 | }; | |
117 | ||
78d3a92e | 118 | /* |
85edcd01 | 119 | * For GPIO chips which call acpi_gpiochip_request_interrupts() before late_init |
e59f5e08 | 120 | * (so builtin drivers) we register the ACPI GpioInt IRQ handlers from a |
85edcd01 AS |
121 | * late_initcall_sync() handler, so that other builtin drivers can register their |
122 | * OpRegions before the event handlers can run. This list contains GPIO chips | |
e59f5e08 | 123 | * for which the acpi_gpiochip_request_irqs() call has been deferred. |
78d3a92e HG |
124 | */ |
125 | static DEFINE_MUTEX(acpi_gpio_deferred_req_irqs_lock); | |
126 | static LIST_HEAD(acpi_gpio_deferred_req_irqs_list); | |
127 | static bool acpi_gpio_deferred_req_irqs_done; | |
ca876c74 | 128 | |
faf6efd2 | 129 | static int acpi_gpiochip_find(struct gpio_chip *gc, const void *data) |
e29482e8 | 130 | { |
067dbc1e | 131 | return device_match_acpi_handle(&gc->gpiodev->dev, data); |
e29482e8 MN |
132 | } |
133 | ||
134 | /** | |
936e15dd | 135 | * acpi_get_gpiod() - Translate ACPI GPIO pin to GPIO descriptor usable with GPIO API |
e29482e8 MN |
136 | * @path: ACPI GPIO controller full path name, (e.g. "\\_SB.GPO1") |
137 | * @pin: ACPI GPIO pin number (0-based, controller-relative) | |
138 | * | |
f35bbf61 MW |
139 | * Return: GPIO descriptor to use with Linux generic GPIO API, or ERR_PTR |
140 | * error value. Specifically returns %-EPROBE_DEFER if the referenced GPIO | |
85edcd01 | 141 | * controller does not have GPIO chip registered at the moment. This is to |
f35bbf61 | 142 | * support probe deferral. |
e29482e8 | 143 | */ |
0c2cae09 | 144 | static struct gpio_desc *acpi_get_gpiod(char *path, unsigned int pin) |
e29482e8 | 145 | { |
e29482e8 MN |
146 | acpi_handle handle; |
147 | acpi_status status; | |
148 | ||
149 | status = acpi_get_handle(NULL, path, &handle); | |
150 | if (ACPI_FAILURE(status)) | |
936e15dd | 151 | return ERR_PTR(-ENODEV); |
e29482e8 | 152 | |
3c9d5431 BG |
153 | struct gpio_device *gdev __free(gpio_device_put) = |
154 | gpio_device_find(handle, acpi_gpiochip_find); | |
155 | if (!gdev) | |
f35bbf61 | 156 | return ERR_PTR(-EPROBE_DEFER); |
e29482e8 | 157 | |
3c9d5431 BG |
158 | /* |
159 | * FIXME: keep track of the reference to the GPIO device somehow | |
160 | * instead of putting it here. | |
161 | */ | |
162 | return gpio_device_get_desc(gdev, pin); | |
43582f29 | 163 | } |
43582f29 | 164 | |
0d1c28a4 MN |
165 | static irqreturn_t acpi_gpio_irq_handler(int irq, void *data) |
166 | { | |
6072b9dc | 167 | struct acpi_gpio_event *event = data; |
0d1c28a4 | 168 | |
6072b9dc | 169 | acpi_evaluate_object(event->handle, NULL, NULL, NULL); |
0d1c28a4 MN |
170 | |
171 | return IRQ_HANDLED; | |
172 | } | |
173 | ||
7fc7acb9 RW |
174 | static irqreturn_t acpi_gpio_irq_handler_evt(int irq, void *data) |
175 | { | |
4b01a14b | 176 | struct acpi_gpio_event *event = data; |
7fc7acb9 | 177 | |
4b01a14b | 178 | acpi_execute_simple_method(event->handle, NULL, event->pin); |
7fc7acb9 RW |
179 | |
180 | return IRQ_HANDLED; | |
181 | } | |
182 | ||
aa92b6f6 | 183 | static void acpi_gpio_chip_dh(acpi_handle handle, void *data) |
7fc7acb9 RW |
184 | { |
185 | /* The address of this function is used as a key. */ | |
186 | } | |
187 | ||
25e3ef89 AS |
188 | bool acpi_gpio_get_irq_resource(struct acpi_resource *ares, |
189 | struct acpi_resource_gpio **agpio) | |
190 | { | |
191 | struct acpi_resource_gpio *gpio; | |
192 | ||
193 | if (ares->type != ACPI_RESOURCE_TYPE_GPIO) | |
194 | return false; | |
195 | ||
196 | gpio = &ares->data.gpio; | |
197 | if (gpio->connection_type != ACPI_RESOURCE_GPIO_TYPE_INT) | |
198 | return false; | |
199 | ||
200 | *agpio = gpio; | |
201 | return true; | |
202 | } | |
203 | EXPORT_SYMBOL_GPL(acpi_gpio_get_irq_resource); | |
204 | ||
043d7f09 DS |
205 | /** |
206 | * acpi_gpio_get_io_resource - Fetch details of an ACPI resource if it is a GPIO | |
207 | * I/O resource or return False if not. | |
208 | * @ares: Pointer to the ACPI resource to fetch | |
209 | * @agpio: Pointer to a &struct acpi_resource_gpio to store the output pointer | |
210 | */ | |
211 | bool acpi_gpio_get_io_resource(struct acpi_resource *ares, | |
212 | struct acpi_resource_gpio **agpio) | |
213 | { | |
214 | struct acpi_resource_gpio *gpio; | |
215 | ||
216 | if (ares->type != ACPI_RESOURCE_TYPE_GPIO) | |
217 | return false; | |
218 | ||
219 | gpio = &ares->data.gpio; | |
220 | if (gpio->connection_type != ACPI_RESOURCE_GPIO_TYPE_IO) | |
221 | return false; | |
222 | ||
223 | *agpio = gpio; | |
224 | return true; | |
225 | } | |
226 | EXPORT_SYMBOL_GPL(acpi_gpio_get_io_resource); | |
227 | ||
e59f5e08 HG |
228 | static void acpi_gpiochip_request_irq(struct acpi_gpio_chip *acpi_gpio, |
229 | struct acpi_gpio_event *event) | |
230 | { | |
be3dc15f | 231 | struct device *parent = acpi_gpio->chip->parent; |
e59f5e08 HG |
232 | int ret, value; |
233 | ||
234 | ret = request_threaded_irq(event->irq, NULL, event->handler, | |
6e5d5791 | 235 | event->irqflags | IRQF_ONESHOT, "ACPI:Event", event); |
e59f5e08 | 236 | if (ret) { |
be3dc15f | 237 | dev_err(parent, "Failed to setup interrupt handler for %d\n", event->irq); |
e59f5e08 HG |
238 | return; |
239 | } | |
240 | ||
241 | if (event->irq_is_wake) | |
242 | enable_irq_wake(event->irq); | |
243 | ||
244 | event->irq_requested = true; | |
245 | ||
246 | /* Make sure we trigger the initial state of edge-triggered IRQs */ | |
61f7f7c8 HG |
247 | if (run_edge_events_on_boot && |
248 | (event->irqflags & (IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING))) { | |
249 | value = gpiod_get_raw_value_cansleep(event->desc); | |
250 | if (((event->irqflags & IRQF_TRIGGER_RISING) && value == 1) || | |
251 | ((event->irqflags & IRQF_TRIGGER_FALLING) && value == 0)) | |
252 | event->handler(event->irq, event); | |
253 | } | |
e59f5e08 HG |
254 | } |
255 | ||
256 | static void acpi_gpiochip_request_irqs(struct acpi_gpio_chip *acpi_gpio) | |
257 | { | |
258 | struct acpi_gpio_event *event; | |
259 | ||
260 | list_for_each_entry(event, &acpi_gpio->events, node) | |
261 | acpi_gpiochip_request_irq(acpi_gpio, event); | |
262 | } | |
263 | ||
1a81f191 | 264 | static enum gpiod_flags |
56f7058a | 265 | acpi_gpio_to_gpiod_flags(const struct acpi_resource_gpio *agpio, int polarity) |
1a81f191 | 266 | { |
bca40480 AS |
267 | /* GpioInt() implies input configuration */ |
268 | if (agpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT) | |
269 | return GPIOD_IN; | |
270 | ||
1a81f191 AS |
271 | switch (agpio->io_restriction) { |
272 | case ACPI_IO_RESTRICT_INPUT: | |
273 | return GPIOD_IN; | |
274 | case ACPI_IO_RESTRICT_OUTPUT: | |
275 | /* | |
276 | * ACPI GPIO resources don't contain an initial value for the | |
277 | * GPIO. Therefore we deduce that value from the pull field | |
56f7058a VLS |
278 | * and the polarity instead. If the pin is pulled up we assume |
279 | * default to be high, if it is pulled down we assume default | |
280 | * to be low, otherwise we leave pin untouched. For active low | |
281 | * polarity values will be switched. See also | |
282 | * Documentation/firmware-guide/acpi/gpio-properties.rst. | |
1a81f191 AS |
283 | */ |
284 | switch (agpio->pin_config) { | |
285 | case ACPI_PIN_CONFIG_PULLUP: | |
56f7058a | 286 | return polarity == GPIO_ACTIVE_LOW ? GPIOD_OUT_LOW : GPIOD_OUT_HIGH; |
1a81f191 | 287 | case ACPI_PIN_CONFIG_PULLDOWN: |
56f7058a | 288 | return polarity == GPIO_ACTIVE_LOW ? GPIOD_OUT_HIGH : GPIOD_OUT_LOW; |
1a81f191 AS |
289 | default: |
290 | break; | |
291 | } | |
40b37008 | 292 | break; |
1a81f191 AS |
293 | default: |
294 | break; | |
295 | } | |
296 | ||
297 | /* | |
298 | * Assume that the BIOS has configured the direction and pull | |
299 | * accordingly. | |
300 | */ | |
301 | return GPIOD_ASIS; | |
302 | } | |
303 | ||
2e2b496c AS |
304 | static struct gpio_desc *acpi_request_own_gpiod(struct gpio_chip *chip, |
305 | struct acpi_resource_gpio *agpio, | |
306 | unsigned int index, | |
307 | const char *label) | |
308 | { | |
309 | int polarity = GPIO_ACTIVE_HIGH; | |
310 | enum gpiod_flags flags = acpi_gpio_to_gpiod_flags(agpio, polarity); | |
311 | unsigned int pin = agpio->pin_table[index]; | |
312 | struct gpio_desc *desc; | |
313 | int ret; | |
314 | ||
315 | desc = gpiochip_request_own_desc(chip, pin, label, polarity, flags); | |
316 | if (IS_ERR(desc)) | |
317 | return desc; | |
318 | ||
660c619b AS |
319 | /* ACPI uses hundredths of milliseconds units */ |
320 | ret = gpio_set_debounce_timeout(desc, agpio->debounce_timeout * 10); | |
2e2b496c | 321 | if (ret) |
cef0d022 HG |
322 | dev_warn(chip->parent, |
323 | "Failed to set debounce-timeout for pin 0x%04X, err %d\n", | |
324 | pin, ret); | |
2e2b496c | 325 | |
cef0d022 | 326 | return desc; |
2e2b496c AS |
327 | } |
328 | ||
6b6af7bd ML |
329 | static bool acpi_gpio_in_ignore_list(const char *ignore_list, const char *controller_in, |
330 | unsigned int pin_in) | |
2ccb21f5 HG |
331 | { |
332 | const char *controller, *pin_str; | |
0c2cae09 | 333 | unsigned int pin; |
2ccb21f5 | 334 | char *endp; |
0c2cae09 | 335 | int len; |
2ccb21f5 | 336 | |
6b6af7bd | 337 | controller = ignore_list; |
2ccb21f5 HG |
338 | while (controller) { |
339 | pin_str = strchr(controller, '@'); | |
340 | if (!pin_str) | |
341 | goto err; | |
342 | ||
343 | len = pin_str - controller; | |
344 | if (len == strlen(controller_in) && | |
345 | strncmp(controller, controller_in, len) == 0) { | |
346 | pin = simple_strtoul(pin_str + 1, &endp, 10); | |
347 | if (*endp != 0 && *endp != ',') | |
348 | goto err; | |
349 | ||
350 | if (pin == pin_in) | |
351 | return true; | |
352 | } | |
353 | ||
354 | controller = strchr(controller, ','); | |
355 | if (controller) | |
356 | controller++; | |
357 | } | |
358 | ||
359 | return false; | |
360 | err: | |
6b6af7bd | 361 | pr_err_once("Error: Invalid value for gpiolib_acpi.ignore_...: %s\n", ignore_list); |
2ccb21f5 HG |
362 | return false; |
363 | } | |
364 | ||
365 | static bool acpi_gpio_irq_is_wake(struct device *parent, | |
0e3b175f | 366 | const struct acpi_resource_gpio *agpio) |
2ccb21f5 | 367 | { |
0c2cae09 | 368 | unsigned int pin = agpio->pin_table[0]; |
2ccb21f5 HG |
369 | |
370 | if (agpio->wake_capable != ACPI_WAKE_CAPABLE) | |
371 | return false; | |
372 | ||
6b6af7bd | 373 | if (acpi_gpio_in_ignore_list(ignore_wake, dev_name(parent), pin)) { |
0c2cae09 | 374 | dev_info(parent, "Ignoring wakeup on pin %u\n", pin); |
2ccb21f5 HG |
375 | return false; |
376 | } | |
377 | ||
378 | return true; | |
379 | } | |
380 | ||
d4fc46f1 | 381 | /* Always returns AE_OK so that we keep looping over the resources */ |
e59f5e08 HG |
382 | static acpi_status acpi_gpiochip_alloc_event(struct acpi_resource *ares, |
383 | void *context) | |
0d1c28a4 | 384 | { |
6072b9dc | 385 | struct acpi_gpio_chip *acpi_gpio = context; |
aa92b6f6 | 386 | struct gpio_chip *chip = acpi_gpio->chip; |
6072b9dc | 387 | struct acpi_resource_gpio *agpio; |
7fc7acb9 | 388 | acpi_handle handle, evt_handle; |
6072b9dc MW |
389 | struct acpi_gpio_event *event; |
390 | irq_handler_t handler = NULL; | |
391 | struct gpio_desc *desc; | |
0c2cae09 AS |
392 | unsigned int pin; |
393 | int ret, irq; | |
0d1c28a4 | 394 | |
25e3ef89 | 395 | if (!acpi_gpio_get_irq_resource(ares, &agpio)) |
6072b9dc | 396 | return AE_OK; |
0d1c28a4 | 397 | |
58383c78 | 398 | handle = ACPI_HANDLE(chip->parent); |
6072b9dc MW |
399 | pin = agpio->pin_table[0]; |
400 | ||
401 | if (pin <= 255) { | |
213d266e LT |
402 | char ev_name[8]; |
403 | sprintf(ev_name, "_%c%02X", | |
6072b9dc MW |
404 | agpio->triggering == ACPI_EDGE_SENSITIVE ? 'E' : 'L', |
405 | pin); | |
406 | if (ACPI_SUCCESS(acpi_get_handle(handle, ev_name, &evt_handle))) | |
407 | handler = acpi_gpio_irq_handler; | |
408 | } | |
409 | if (!handler) { | |
410 | if (ACPI_SUCCESS(acpi_get_handle(handle, "_EVT", &evt_handle))) | |
411 | handler = acpi_gpio_irq_handler_evt; | |
412 | } | |
413 | if (!handler) | |
c06632ea | 414 | return AE_OK; |
0d1c28a4 | 415 | |
5fb36a8c HG |
416 | if (acpi_gpio_in_ignore_list(ignore_interrupt, dev_name(chip->parent), pin)) { |
417 | dev_info(chip->parent, "Ignoring interrupt on pin %u\n", pin); | |
418 | return AE_OK; | |
419 | } | |
420 | ||
2e2b496c | 421 | desc = acpi_request_own_gpiod(chip, agpio, 0, "ACPI:Event"); |
6072b9dc | 422 | if (IS_ERR(desc)) { |
3f86a7e0 HG |
423 | dev_err(chip->parent, |
424 | "Failed to request GPIO for pin 0x%04X, err %ld\n", | |
425 | pin, PTR_ERR(desc)); | |
d4fc46f1 | 426 | return AE_OK; |
6072b9dc | 427 | } |
0d1c28a4 | 428 | |
e3a2e878 | 429 | ret = gpiochip_lock_as_irq(chip, pin); |
6072b9dc | 430 | if (ret) { |
3f86a7e0 HG |
431 | dev_err(chip->parent, |
432 | "Failed to lock GPIO pin 0x%04X as interrupt, err %d\n", | |
433 | pin, ret); | |
6072b9dc MW |
434 | goto fail_free_desc; |
435 | } | |
0d1c28a4 | 436 | |
6072b9dc MW |
437 | irq = gpiod_to_irq(desc); |
438 | if (irq < 0) { | |
3f86a7e0 HG |
439 | dev_err(chip->parent, |
440 | "Failed to translate GPIO pin 0x%04X to IRQ, err %d\n", | |
441 | pin, irq); | |
6072b9dc MW |
442 | goto fail_unlock_irq; |
443 | } | |
7fc7acb9 | 444 | |
e59f5e08 HG |
445 | event = kzalloc(sizeof(*event), GFP_KERNEL); |
446 | if (!event) | |
447 | goto fail_unlock_irq; | |
448 | ||
449 | event->irqflags = IRQF_ONESHOT; | |
6072b9dc MW |
450 | if (agpio->triggering == ACPI_LEVEL_SENSITIVE) { |
451 | if (agpio->polarity == ACPI_ACTIVE_HIGH) | |
e59f5e08 | 452 | event->irqflags |= IRQF_TRIGGER_HIGH; |
6072b9dc | 453 | else |
e59f5e08 | 454 | event->irqflags |= IRQF_TRIGGER_LOW; |
6072b9dc MW |
455 | } else { |
456 | switch (agpio->polarity) { | |
457 | case ACPI_ACTIVE_HIGH: | |
e59f5e08 | 458 | event->irqflags |= IRQF_TRIGGER_RISING; |
6072b9dc MW |
459 | break; |
460 | case ACPI_ACTIVE_LOW: | |
e59f5e08 | 461 | event->irqflags |= IRQF_TRIGGER_FALLING; |
6072b9dc MW |
462 | break; |
463 | default: | |
e59f5e08 HG |
464 | event->irqflags |= IRQF_TRIGGER_RISING | |
465 | IRQF_TRIGGER_FALLING; | |
6072b9dc | 466 | break; |
7fc7acb9 | 467 | } |
6072b9dc | 468 | } |
aa92b6f6 | 469 | |
6072b9dc | 470 | event->handle = evt_handle; |
e59f5e08 | 471 | event->handler = handler; |
6072b9dc | 472 | event->irq = irq; |
2ccb21f5 | 473 | event->irq_is_wake = acpi_gpio_irq_is_wake(chip->parent, agpio); |
6072b9dc | 474 | event->pin = pin; |
e46cf32c | 475 | event->desc = desc; |
7fc7acb9 | 476 | |
6072b9dc | 477 | list_add_tail(&event->node, &acpi_gpio->events); |
ca876c74 | 478 | |
6072b9dc MW |
479 | return AE_OK; |
480 | ||
6072b9dc | 481 | fail_unlock_irq: |
e3a2e878 | 482 | gpiochip_unlock_as_irq(chip, pin); |
6072b9dc MW |
483 | fail_free_desc: |
484 | gpiochip_free_own_desc(desc); | |
485 | ||
d4fc46f1 | 486 | return AE_OK; |
0d1c28a4 | 487 | } |
7fc7acb9 | 488 | |
70b53411 | 489 | /** |
6072b9dc | 490 | * acpi_gpiochip_request_interrupts() - Register isr for gpio chip ACPI events |
afa82fab | 491 | * @chip: GPIO chip |
70b53411 | 492 | * |
6072b9dc MW |
493 | * ACPI5 platforms can use GPIO signaled ACPI events. These GPIO interrupts are |
494 | * handled by ACPI event methods which need to be called from the GPIO | |
85edcd01 AS |
495 | * chip's interrupt handler. acpi_gpiochip_request_interrupts() finds out which |
496 | * GPIO pins have ACPI event methods and assigns interrupt handlers that calls | |
497 | * the ACPI event methods for those pins. | |
6072b9dc | 498 | */ |
afa82fab | 499 | void acpi_gpiochip_request_interrupts(struct gpio_chip *chip) |
6072b9dc | 500 | { |
afa82fab MW |
501 | struct acpi_gpio_chip *acpi_gpio; |
502 | acpi_handle handle; | |
503 | acpi_status status; | |
78d3a92e | 504 | bool defer; |
afa82fab | 505 | |
58383c78 | 506 | if (!chip->parent || !chip->to_irq) |
afa82fab | 507 | return; |
6072b9dc | 508 | |
58383c78 | 509 | handle = ACPI_HANDLE(chip->parent); |
afa82fab MW |
510 | if (!handle) |
511 | return; | |
512 | ||
513 | status = acpi_get_data(handle, acpi_gpio_chip_dh, (void **)&acpi_gpio); | |
514 | if (ACPI_FAILURE(status)) | |
6072b9dc MW |
515 | return; |
516 | ||
5adc4093 HG |
517 | if (acpi_quirk_skip_gpio_event_handlers()) |
518 | return; | |
519 | ||
eac001bf | 520 | acpi_walk_resources(handle, METHOD_NAME__AEI, |
e59f5e08 HG |
521 | acpi_gpiochip_alloc_event, acpi_gpio); |
522 | ||
78d3a92e HG |
523 | mutex_lock(&acpi_gpio_deferred_req_irqs_lock); |
524 | defer = !acpi_gpio_deferred_req_irqs_done; | |
525 | if (defer) | |
526 | list_add(&acpi_gpio->deferred_req_irqs_list_entry, | |
527 | &acpi_gpio_deferred_req_irqs_list); | |
528 | mutex_unlock(&acpi_gpio_deferred_req_irqs_lock); | |
529 | ||
530 | if (defer) | |
531 | return; | |
532 | ||
e59f5e08 | 533 | acpi_gpiochip_request_irqs(acpi_gpio); |
6072b9dc | 534 | } |
2b528fff | 535 | EXPORT_SYMBOL_GPL(acpi_gpiochip_request_interrupts); |
6072b9dc MW |
536 | |
537 | /** | |
538 | * acpi_gpiochip_free_interrupts() - Free GPIO ACPI event interrupts. | |
afa82fab | 539 | * @chip: GPIO chip |
70b53411 | 540 | * |
6072b9dc MW |
541 | * Free interrupts associated with GPIO ACPI event method for the given |
542 | * GPIO chip. | |
70b53411 | 543 | */ |
afa82fab | 544 | void acpi_gpiochip_free_interrupts(struct gpio_chip *chip) |
70b53411 | 545 | { |
afa82fab | 546 | struct acpi_gpio_chip *acpi_gpio; |
4b01a14b | 547 | struct acpi_gpio_event *event, *ep; |
afa82fab MW |
548 | acpi_handle handle; |
549 | acpi_status status; | |
550 | ||
58383c78 | 551 | if (!chip->parent || !chip->to_irq) |
afa82fab | 552 | return; |
70b53411 | 553 | |
58383c78 | 554 | handle = ACPI_HANDLE(chip->parent); |
afa82fab MW |
555 | if (!handle) |
556 | return; | |
557 | ||
558 | status = acpi_get_data(handle, acpi_gpio_chip_dh, (void **)&acpi_gpio); | |
559 | if (ACPI_FAILURE(status)) | |
70b53411 MW |
560 | return; |
561 | ||
78d3a92e HG |
562 | mutex_lock(&acpi_gpio_deferred_req_irqs_lock); |
563 | if (!list_empty(&acpi_gpio->deferred_req_irqs_list_entry)) | |
564 | list_del_init(&acpi_gpio->deferred_req_irqs_list_entry); | |
565 | mutex_unlock(&acpi_gpio_deferred_req_irqs_lock); | |
566 | ||
4b01a14b | 567 | list_for_each_entry_safe_reverse(event, ep, &acpi_gpio->events, node) { |
e59f5e08 HG |
568 | if (event->irq_requested) { |
569 | if (event->irq_is_wake) | |
570 | disable_irq_wake(event->irq); | |
571 | ||
572 | free_irq(event->irq, event); | |
573 | } | |
8a146fbe | 574 | |
e3a2e878 | 575 | gpiochip_unlock_as_irq(chip, event->pin); |
86252329 | 576 | gpiochip_free_own_desc(event->desc); |
4b01a14b MW |
577 | list_del(&event->node); |
578 | kfree(event); | |
70b53411 | 579 | } |
70b53411 | 580 | } |
2b528fff | 581 | EXPORT_SYMBOL_GPL(acpi_gpiochip_free_interrupts); |
70b53411 | 582 | |
f028d524 RW |
583 | int acpi_dev_add_driver_gpios(struct acpi_device *adev, |
584 | const struct acpi_gpio_mapping *gpios) | |
585 | { | |
586 | if (adev && gpios) { | |
587 | adev->driver_gpios = gpios; | |
588 | return 0; | |
589 | } | |
590 | return -EINVAL; | |
591 | } | |
592 | EXPORT_SYMBOL_GPL(acpi_dev_add_driver_gpios); | |
593 | ||
2838bf94 AS |
594 | void acpi_dev_remove_driver_gpios(struct acpi_device *adev) |
595 | { | |
596 | if (adev) | |
597 | adev->driver_gpios = NULL; | |
598 | } | |
599 | EXPORT_SYMBOL_GPL(acpi_dev_remove_driver_gpios); | |
600 | ||
2ff64a84 | 601 | static void acpi_dev_release_driver_gpios(void *adev) |
85c73d50 | 602 | { |
2ff64a84 | 603 | acpi_dev_remove_driver_gpios(adev); |
85c73d50 AS |
604 | } |
605 | ||
606 | int devm_acpi_dev_add_driver_gpios(struct device *dev, | |
607 | const struct acpi_gpio_mapping *gpios) | |
608 | { | |
2ff64a84 | 609 | struct acpi_device *adev = ACPI_COMPANION(dev); |
85c73d50 AS |
610 | int ret; |
611 | ||
2ff64a84 AS |
612 | ret = acpi_dev_add_driver_gpios(adev, gpios); |
613 | if (ret) | |
85c73d50 | 614 | return ret; |
2ff64a84 AS |
615 | |
616 | return devm_add_action_or_reset(dev, acpi_dev_release_driver_gpios, adev); | |
85c73d50 AS |
617 | } |
618 | EXPORT_SYMBOL_GPL(devm_acpi_dev_add_driver_gpios); | |
619 | ||
f028d524 RW |
620 | static bool acpi_get_driver_gpio_data(struct acpi_device *adev, |
621 | const char *name, int index, | |
977d5ad3 | 622 | struct fwnode_reference_args *args, |
ce0929d2 | 623 | unsigned int *quirks) |
f028d524 RW |
624 | { |
625 | const struct acpi_gpio_mapping *gm; | |
626 | ||
af3b462a | 627 | if (!adev || !adev->driver_gpios) |
f028d524 RW |
628 | return false; |
629 | ||
630 | for (gm = adev->driver_gpios; gm->name; gm++) | |
631 | if (!strcmp(name, gm->name) && gm->data && index < gm->size) { | |
632 | const struct acpi_gpio_params *par = gm->data + index; | |
633 | ||
977d5ad3 | 634 | args->fwnode = acpi_fwnode_handle(adev); |
f028d524 RW |
635 | args->args[0] = par->crs_entry_index; |
636 | args->args[1] = par->line_index; | |
637 | args->args[2] = par->active_low; | |
638 | args->nargs = 3; | |
ce0929d2 AS |
639 | |
640 | *quirks = gm->quirks; | |
f028d524 RW |
641 | return true; |
642 | } | |
643 | ||
644 | return false; | |
645 | } | |
646 | ||
5c34b6c1 AS |
647 | static int |
648 | __acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags, enum gpiod_flags update) | |
a31f5c3a | 649 | { |
72893f0c HG |
650 | const enum gpiod_flags mask = |
651 | GPIOD_FLAGS_BIT_DIR_SET | GPIOD_FLAGS_BIT_DIR_OUT | | |
652 | GPIOD_FLAGS_BIT_DIR_VAL; | |
a31f5c3a AS |
653 | int ret = 0; |
654 | ||
655 | /* | |
656 | * Check if the BIOS has IoRestriction with explicitly set direction | |
657 | * and update @flags accordingly. Otherwise use whatever caller asked | |
658 | * for. | |
659 | */ | |
660 | if (update & GPIOD_FLAGS_BIT_DIR_SET) { | |
661 | enum gpiod_flags diff = *flags ^ update; | |
662 | ||
663 | /* | |
664 | * Check if caller supplied incompatible GPIO initialization | |
665 | * flags. | |
666 | * | |
667 | * Return %-EINVAL to notify that firmware has different | |
668 | * settings and we are going to use them. | |
669 | */ | |
670 | if (((*flags & GPIOD_FLAGS_BIT_DIR_SET) && (diff & GPIOD_FLAGS_BIT_DIR_OUT)) || | |
671 | ((*flags & GPIOD_FLAGS_BIT_DIR_OUT) && (diff & GPIOD_FLAGS_BIT_DIR_VAL))) | |
672 | ret = -EINVAL; | |
72893f0c | 673 | *flags = (*flags & ~mask) | (update & mask); |
a31f5c3a AS |
674 | } |
675 | return ret; | |
676 | } | |
677 | ||
b7452d67 DT |
678 | static int acpi_gpio_update_gpiod_flags(enum gpiod_flags *flags, |
679 | struct acpi_gpio_info *info) | |
5c34b6c1 AS |
680 | { |
681 | struct device *dev = &info->adev->dev; | |
1b2ca32a | 682 | enum gpiod_flags old = *flags; |
5c34b6c1 AS |
683 | int ret; |
684 | ||
1b2ca32a AS |
685 | ret = __acpi_gpio_update_gpiod_flags(&old, info->flags); |
686 | if (info->quirks & ACPI_GPIO_QUIRK_NO_IO_RESTRICTION) { | |
687 | if (ret) | |
688 | dev_warn(dev, FW_BUG "GPIO not in correct mode, fixing\n"); | |
689 | } else { | |
690 | if (ret) | |
691 | dev_dbg(dev, "Override GPIO initialization flags\n"); | |
692 | *flags = old; | |
693 | } | |
5c34b6c1 AS |
694 | |
695 | return ret; | |
696 | } | |
697 | ||
b7452d67 DT |
698 | static int acpi_gpio_update_gpiod_lookup_flags(unsigned long *lookupflags, |
699 | struct acpi_gpio_info *info) | |
606be344 | 700 | { |
2d3b6db1 AS |
701 | switch (info->pin_config) { |
702 | case ACPI_PIN_CONFIG_PULLUP: | |
703 | *lookupflags |= GPIO_PULL_UP; | |
704 | break; | |
705 | case ACPI_PIN_CONFIG_PULLDOWN: | |
706 | *lookupflags |= GPIO_PULL_DOWN; | |
707 | break; | |
6fd03f02 NS |
708 | case ACPI_PIN_CONFIG_NOPULL: |
709 | *lookupflags |= GPIO_PULL_DISABLE; | |
710 | break; | |
2d3b6db1 AS |
711 | default: |
712 | break; | |
713 | } | |
714 | ||
606be344 AS |
715 | if (info->polarity == GPIO_ACTIVE_LOW) |
716 | *lookupflags |= GPIO_ACTIVE_LOW; | |
717 | ||
718 | return 0; | |
719 | } | |
720 | ||
12028d2d MW |
721 | struct acpi_gpio_lookup { |
722 | struct acpi_gpio_info info; | |
723 | int index; | |
74301f27 | 724 | u16 pin_index; |
d079524a | 725 | bool active_low; |
936e15dd | 726 | struct gpio_desc *desc; |
12028d2d MW |
727 | int n; |
728 | }; | |
729 | ||
031ba28a | 730 | static int acpi_populate_gpio_lookup(struct acpi_resource *ares, void *data) |
12028d2d MW |
731 | { |
732 | struct acpi_gpio_lookup *lookup = data; | |
733 | ||
734 | if (ares->type != ACPI_RESOURCE_TYPE_GPIO) | |
735 | return 1; | |
736 | ||
4d1f7a6e | 737 | if (!lookup->desc) { |
12028d2d | 738 | const struct acpi_resource_gpio *agpio = &ares->data.gpio; |
4d1f7a6e | 739 | bool gpioint = agpio->connection_type == ACPI_RESOURCE_GPIO_TYPE_INT; |
62d5247d | 740 | struct gpio_desc *desc; |
74301f27 | 741 | u16 pin_index; |
0d9a693c | 742 | |
4d1f7a6e AS |
743 | if (lookup->info.quirks & ACPI_GPIO_QUIRK_ONLY_GPIOIO && gpioint) |
744 | lookup->index++; | |
745 | ||
746 | if (lookup->n++ != lookup->index) | |
747 | return 1; | |
748 | ||
749 | pin_index = lookup->pin_index; | |
0d9a693c MW |
750 | if (pin_index >= agpio->pin_table_length) |
751 | return 1; | |
12028d2d | 752 | |
62d5247d AS |
753 | if (lookup->info.quirks & ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER) |
754 | desc = gpio_to_desc(agpio->pin_table[pin_index]); | |
755 | else | |
756 | desc = acpi_get_gpiod(agpio->resource_source.string_ptr, | |
0d9a693c | 757 | agpio->pin_table[pin_index]); |
62d5247d | 758 | lookup->desc = desc; |
2d3b6db1 | 759 | lookup->info.pin_config = agpio->pin_config; |
8dcb7a15 | 760 | lookup->info.debounce = agpio->debounce_timeout; |
4d1f7a6e | 761 | lookup->info.gpioint = gpioint; |
0e3b175f | 762 | lookup->info.wake_capable = acpi_gpio_irq_is_wake(&lookup->info.adev->dev, agpio); |
0d9a693c MW |
763 | |
764 | /* | |
e567c35f AS |
765 | * Polarity and triggering are only specified for GpioInt |
766 | * resource. | |
52044723 CR |
767 | * Note: we expect here: |
768 | * - ACPI_ACTIVE_LOW == GPIO_ACTIVE_LOW | |
769 | * - ACPI_ACTIVE_HIGH == GPIO_ACTIVE_HIGH | |
0d9a693c | 770 | */ |
52044723 CR |
771 | if (lookup->info.gpioint) { |
772 | lookup->info.polarity = agpio->polarity; | |
773 | lookup->info.triggering = agpio->triggering; | |
a31f5c3a | 774 | } else { |
f67a6c11 | 775 | lookup->info.polarity = lookup->active_low; |
52044723 | 776 | } |
bca40480 AS |
777 | |
778 | lookup->info.flags = acpi_gpio_to_gpiod_flags(agpio, lookup->info.polarity); | |
12028d2d MW |
779 | } |
780 | ||
781 | return 1; | |
782 | } | |
783 | ||
d079524a RW |
784 | static int acpi_gpio_resource_lookup(struct acpi_gpio_lookup *lookup, |
785 | struct acpi_gpio_info *info) | |
786 | { | |
5870cff4 | 787 | struct acpi_device *adev = lookup->info.adev; |
d079524a RW |
788 | struct list_head res_list; |
789 | int ret; | |
790 | ||
791 | INIT_LIST_HEAD(&res_list); | |
792 | ||
5870cff4 | 793 | ret = acpi_dev_get_resources(adev, &res_list, |
031ba28a | 794 | acpi_populate_gpio_lookup, |
d079524a RW |
795 | lookup); |
796 | if (ret < 0) | |
797 | return ret; | |
798 | ||
799 | acpi_dev_free_resource_list(&res_list); | |
800 | ||
801 | if (!lookup->desc) | |
802 | return -ENOENT; | |
803 | ||
f67a6c11 | 804 | if (info) |
d079524a | 805 | *info = lookup->info; |
d079524a RW |
806 | return 0; |
807 | } | |
808 | ||
504a3374 | 809 | static int acpi_gpio_property_lookup(struct fwnode_handle *fwnode, |
d079524a RW |
810 | const char *propname, int index, |
811 | struct acpi_gpio_lookup *lookup) | |
812 | { | |
977d5ad3 | 813 | struct fwnode_reference_args args; |
ce0929d2 | 814 | unsigned int quirks = 0; |
d079524a RW |
815 | int ret; |
816 | ||
817 | memset(&args, 0, sizeof(args)); | |
6f7194a1 MW |
818 | ret = __acpi_node_get_property_reference(fwnode, propname, index, 3, |
819 | &args); | |
504a3374 | 820 | if (ret) { |
af3b462a | 821 | struct acpi_device *adev; |
504a3374 | 822 | |
af3b462a AS |
823 | adev = to_acpi_device_node(fwnode); |
824 | if (!acpi_get_driver_gpio_data(adev, propname, index, &args, &quirks)) | |
504a3374 RW |
825 | return ret; |
826 | } | |
d079524a RW |
827 | /* |
828 | * The property was found and resolved, so need to lookup the GPIO based | |
829 | * on returned args. | |
830 | */ | |
977d5ad3 SA |
831 | if (!to_acpi_device_node(args.fwnode)) |
832 | return -EINVAL; | |
6f7194a1 MW |
833 | if (args.nargs != 3) |
834 | return -EPROTO; | |
835 | ||
836 | lookup->index = args.args[0]; | |
837 | lookup->pin_index = args.args[1]; | |
838 | lookup->active_low = !!args.args[2]; | |
839 | ||
977d5ad3 | 840 | lookup->info.adev = to_acpi_device_node(args.fwnode); |
ce0929d2 | 841 | lookup->info.quirks = quirks; |
977d5ad3 | 842 | |
d079524a RW |
843 | return 0; |
844 | } | |
845 | ||
12028d2d | 846 | /** |
936e15dd | 847 | * acpi_get_gpiod_by_index() - get a GPIO descriptor from device resources |
0d9a693c MW |
848 | * @adev: pointer to a ACPI device to get GPIO from |
849 | * @propname: Property name of the GPIO (optional) | |
12028d2d MW |
850 | * @index: index of GpioIo/GpioInt resource (starting from %0) |
851 | * @info: info pointer to fill in (optional) | |
852 | * | |
0d9a693c | 853 | * Function goes through ACPI resources for @adev and based on @index looks |
936e15dd | 854 | * up a GpioIo/GpioInt resource, translates it to the Linux GPIO descriptor, |
12028d2d MW |
855 | * and returns it. @index matches GpioIo/GpioInt resources only so if there |
856 | * are total %3 GPIO resources, the index goes from %0 to %2. | |
857 | * | |
0d9a693c MW |
858 | * If @propname is specified the GPIO is looked using device property. In |
859 | * that case @index is used to select the GPIO entry in the property value | |
860 | * (in case of multiple). | |
861 | * | |
85edcd01 | 862 | * If the GPIO cannot be translated or there is an error, an ERR_PTR is |
12028d2d MW |
863 | * returned. |
864 | * | |
865 | * Note: if the GPIO resource has multiple entries in the pin list, this | |
866 | * function only returns the first. | |
867 | */ | |
031ba28a | 868 | static struct gpio_desc *acpi_get_gpiod_by_index(struct acpi_device *adev, |
16ba046e DT |
869 | const char *propname, |
870 | int index, | |
871 | struct acpi_gpio_info *info) | |
12028d2d MW |
872 | { |
873 | struct acpi_gpio_lookup lookup; | |
12028d2d MW |
874 | int ret; |
875 | ||
12028d2d MW |
876 | memset(&lookup, 0, sizeof(lookup)); |
877 | lookup.index = index; | |
12028d2d | 878 | |
0d9a693c | 879 | if (propname) { |
0d9a693c MW |
880 | dev_dbg(&adev->dev, "GPIO: looking up %s\n", propname); |
881 | ||
504a3374 RW |
882 | ret = acpi_gpio_property_lookup(acpi_fwnode_handle(adev), |
883 | propname, index, &lookup); | |
d079524a RW |
884 | if (ret) |
885 | return ERR_PTR(ret); | |
0d9a693c | 886 | |
74301f27 | 887 | dev_dbg(&adev->dev, "GPIO: _DSD returned %s %d %u %u\n", |
5870cff4 | 888 | dev_name(&lookup.info.adev->dev), lookup.index, |
d079524a | 889 | lookup.pin_index, lookup.active_low); |
0d9a693c MW |
890 | } else { |
891 | dev_dbg(&adev->dev, "GPIO: looking up %d in _CRS\n", index); | |
5870cff4 | 892 | lookup.info.adev = adev; |
0d9a693c MW |
893 | } |
894 | ||
d079524a RW |
895 | ret = acpi_gpio_resource_lookup(&lookup, info); |
896 | return ret ? ERR_PTR(ret) : lookup.desc; | |
12028d2d | 897 | } |
664e3e5a | 898 | |
16ba046e DT |
899 | /** |
900 | * acpi_get_gpiod_from_data() - get a GPIO descriptor from ACPI data node | |
901 | * @fwnode: pointer to an ACPI firmware node to get the GPIO information from | |
902 | * @propname: Property name of the GPIO | |
903 | * @index: index of GpioIo/GpioInt resource (starting from %0) | |
904 | * @info: info pointer to fill in (optional) | |
905 | * | |
906 | * This function uses the property-based GPIO lookup to get to the GPIO | |
907 | * resource with the relevant information from a data-only ACPI firmware node | |
908 | * and uses that to obtain the GPIO descriptor to return. | |
909 | * | |
910 | * If the GPIO cannot be translated or there is an error an ERR_PTR is | |
911 | * returned. | |
912 | */ | |
913 | static struct gpio_desc *acpi_get_gpiod_from_data(struct fwnode_handle *fwnode, | |
914 | const char *propname, | |
915 | int index, | |
916 | struct acpi_gpio_info *info) | |
917 | { | |
918 | struct acpi_gpio_lookup lookup; | |
919 | int ret; | |
920 | ||
921 | if (!is_acpi_data_node(fwnode)) | |
922 | return ERR_PTR(-ENODEV); | |
923 | ||
924 | if (!propname) | |
925 | return ERR_PTR(-EINVAL); | |
926 | ||
479ac419 | 927 | memset(&lookup, 0, sizeof(lookup)); |
16ba046e DT |
928 | lookup.index = index; |
929 | ||
930 | ret = acpi_gpio_property_lookup(fwnode, propname, index, &lookup); | |
931 | if (ret) | |
932 | return ERR_PTR(ret); | |
933 | ||
934 | ret = acpi_gpio_resource_lookup(&lookup, info); | |
935 | return ret ? ERR_PTR(ret) : lookup.desc; | |
936 | } | |
937 | ||
4f78d91c DT |
938 | static bool acpi_can_fallback_to_crs(struct acpi_device *adev, |
939 | const char *con_id) | |
940 | { | |
4bcc9bba LN |
941 | /* If there is no ACPI device, there is no _CRS to fall back to */ |
942 | if (!adev) | |
943 | return false; | |
944 | ||
4f78d91c DT |
945 | /* Never allow fallback if the device has properties */ |
946 | if (acpi_dev_has_props(adev) || adev->driver_gpios) | |
947 | return false; | |
948 | ||
949 | return con_id == NULL; | |
950 | } | |
951 | ||
4fa4c499 AS |
952 | static struct gpio_desc * |
953 | __acpi_find_gpio(struct fwnode_handle *fwnode, const char *con_id, unsigned int idx, | |
49c02f6e | 954 | bool can_fallback, struct acpi_gpio_info *info) |
031ba28a | 955 | { |
16ba046e | 956 | struct acpi_device *adev = to_acpi_device_node(fwnode); |
031ba28a LW |
957 | struct gpio_desc *desc; |
958 | char propname[32]; | |
959 | int i; | |
960 | ||
961 | /* Try first from _DSD */ | |
962 | for (i = 0; i < ARRAY_SIZE(gpio_suffixes); i++) { | |
9e66504a | 963 | if (con_id) { |
031ba28a LW |
964 | snprintf(propname, sizeof(propname), "%s-%s", |
965 | con_id, gpio_suffixes[i]); | |
966 | } else { | |
967 | snprintf(propname, sizeof(propname), "%s", | |
968 | gpio_suffixes[i]); | |
969 | } | |
970 | ||
16ba046e DT |
971 | if (adev) |
972 | desc = acpi_get_gpiod_by_index(adev, | |
4fa4c499 | 973 | propname, idx, info); |
16ba046e DT |
974 | else |
975 | desc = acpi_get_gpiod_from_data(fwnode, | |
4fa4c499 | 976 | propname, idx, info); |
693bdaa1 DT |
977 | if (PTR_ERR(desc) == -EPROBE_DEFER) |
978 | return ERR_CAST(desc); | |
d8a26a18 AS |
979 | |
980 | if (!IS_ERR(desc)) | |
4cd3ef01 | 981 | return desc; |
031ba28a LW |
982 | } |
983 | ||
984 | /* Then from plain _CRS GPIOs */ | |
4bcc9bba LN |
985 | if (can_fallback) |
986 | return acpi_get_gpiod_by_index(adev, NULL, idx, info); | |
031ba28a | 987 | |
4bcc9bba | 988 | return ERR_PTR(-ENOENT); |
4fa4c499 AS |
989 | } |
990 | ||
991 | struct gpio_desc *acpi_find_gpio(struct fwnode_handle *fwnode, | |
992 | const char *con_id, | |
993 | unsigned int idx, | |
994 | enum gpiod_flags *dflags, | |
995 | unsigned long *lookupflags) | |
996 | { | |
997 | struct acpi_device *adev = to_acpi_device_node(fwnode); | |
49c02f6e | 998 | bool can_fallback = acpi_can_fallback_to_crs(adev, con_id); |
4fa4c499 AS |
999 | struct acpi_gpio_info info; |
1000 | struct gpio_desc *desc; | |
1001 | ||
49c02f6e | 1002 | desc = __acpi_find_gpio(fwnode, con_id, idx, can_fallback, &info); |
4fa4c499 AS |
1003 | if (IS_ERR(desc)) |
1004 | return desc; | |
1005 | ||
fe06b56c | 1006 | if (info.gpioint && |
a31f5c3a | 1007 | (*dflags == GPIOD_OUT_LOW || *dflags == GPIOD_OUT_HIGH)) { |
be3dc15f | 1008 | dev_dbg(&adev->dev, "refusing GpioInt() entry when doing GPIOD_OUT_* lookup\n"); |
fe06b56c | 1009 | return ERR_PTR(-ENOENT); |
031ba28a LW |
1010 | } |
1011 | ||
5c34b6c1 | 1012 | acpi_gpio_update_gpiod_flags(dflags, &info); |
606be344 | 1013 | acpi_gpio_update_gpiod_lookup_flags(lookupflags, &info); |
031ba28a LW |
1014 | return desc; |
1015 | } | |
1016 | ||
c884fbd4 | 1017 | /** |
4c992560 | 1018 | * acpi_dev_gpio_irq_wake_get_by() - Find GpioInt and translate it to Linux IRQ number |
c884fbd4 | 1019 | * @adev: pointer to a ACPI device to get IRQ from |
57b60ec4 | 1020 | * @con_id: optional name of GpioInt resource |
c884fbd4 | 1021 | * @index: index of GpioInt resource (starting from %0) |
4c992560 | 1022 | * @wake_capable: Set to true if the IRQ is wake capable |
c884fbd4 MW |
1023 | * |
1024 | * If the device has one or more GpioInt resources, this function can be | |
1025 | * used to translate from the GPIO offset in the resource to the Linux IRQ | |
1026 | * number. | |
1027 | * | |
a31f5c3a AS |
1028 | * The function is idempotent, though each time it runs it will configure GPIO |
1029 | * pin direction according to the flags in GpioInt resource. | |
1030 | * | |
57b60ec4 AS |
1031 | * The function takes optional @con_id parameter. If the resource has |
1032 | * a @con_id in a property, then only those will be taken into account. | |
80939021 | 1033 | * |
4c992560 RR |
1034 | * The GPIO is considered wake capable if the GpioInt resource specifies |
1035 | * SharedAndWake or ExclusiveAndWake. | |
1036 | * | |
db05c7ef | 1037 | * Return: Linux IRQ number (> %0) on success, negative errno on failure. |
c884fbd4 | 1038 | */ |
57b60ec4 | 1039 | int acpi_dev_gpio_irq_wake_get_by(struct acpi_device *adev, const char *con_id, int index, |
4c992560 | 1040 | bool *wake_capable) |
c884fbd4 | 1041 | { |
716b5328 | 1042 | struct fwnode_handle *fwnode = acpi_fwnode_handle(adev); |
c884fbd4 | 1043 | int idx, i; |
52044723 | 1044 | unsigned int irq_flags; |
a31f5c3a | 1045 | int ret; |
c884fbd4 MW |
1046 | |
1047 | for (i = 0, idx = 0; idx <= index; i++) { | |
1048 | struct acpi_gpio_info info; | |
1049 | struct gpio_desc *desc; | |
1050 | ||
6798d727 | 1051 | /* Ignore -EPROBE_DEFER, it only matters if idx matches */ |
716b5328 | 1052 | desc = __acpi_find_gpio(fwnode, con_id, i, true, &info); |
6798d727 HG |
1053 | if (IS_ERR(desc) && PTR_ERR(desc) != -EPROBE_DEFER) |
1054 | return PTR_ERR(desc); | |
1055 | ||
52044723 | 1056 | if (info.gpioint && idx++ == index) { |
2d6c06f5 | 1057 | unsigned long lflags = GPIO_LOOKUP_FLAGS_DEFAULT; |
e7b73132 | 1058 | enum gpiod_flags dflags = GPIOD_ASIS; |
a31f5c3a | 1059 | char label[32]; |
6798d727 | 1060 | int irq; |
52044723 | 1061 | |
6798d727 HG |
1062 | if (IS_ERR(desc)) |
1063 | return PTR_ERR(desc); | |
52044723 | 1064 | |
6798d727 | 1065 | irq = gpiod_to_irq(desc); |
52044723 CR |
1066 | if (irq < 0) |
1067 | return irq; | |
1068 | ||
e7b73132 AS |
1069 | acpi_gpio_update_gpiod_flags(&dflags, &info); |
1070 | acpi_gpio_update_gpiod_lookup_flags(&lflags, &info); | |
1071 | ||
716b5328 | 1072 | snprintf(label, sizeof(label), "%pfwP GpioInt(%d)", fwnode, index); |
1736df17 AS |
1073 | ret = gpiod_set_consumer_name(desc, con_id ?: label); |
1074 | if (ret) | |
1075 | return ret; | |
1076 | ||
e7b73132 | 1077 | ret = gpiod_configure_flags(desc, label, lflags, dflags); |
a31f5c3a AS |
1078 | if (ret < 0) |
1079 | return ret; | |
1080 | ||
660c619b AS |
1081 | /* ACPI uses hundredths of milliseconds units */ |
1082 | ret = gpio_set_debounce_timeout(desc, info.debounce * 10); | |
8dcb7a15 AS |
1083 | if (ret) |
1084 | return ret; | |
1085 | ||
52044723 CR |
1086 | irq_flags = acpi_dev_get_irq_type(info.triggering, |
1087 | info.polarity); | |
1088 | ||
bdfd6ab8 HG |
1089 | /* |
1090 | * If the IRQ is not already in use then set type | |
1091 | * if specified and different than the current one. | |
1092 | */ | |
1093 | if (can_request_irq(irq, irq_flags)) { | |
1094 | if (irq_flags != IRQ_TYPE_NONE && | |
1095 | irq_flags != irq_get_trigger_type(irq)) | |
1096 | irq_set_irq_type(irq, irq_flags); | |
1097 | } else { | |
1098 | dev_dbg(&adev->dev, "IRQ %d already in use\n", irq); | |
1099 | } | |
52044723 | 1100 | |
d63f11c0 ML |
1101 | /* avoid suspend issues with GPIOs when systems are using S3 */ |
1102 | if (wake_capable && acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0) | |
4c992560 RR |
1103 | *wake_capable = info.wake_capable; |
1104 | ||
52044723 CR |
1105 | return irq; |
1106 | } | |
1107 | ||
c884fbd4 | 1108 | } |
6798d727 | 1109 | return -ENOENT; |
c884fbd4 | 1110 | } |
4c992560 | 1111 | EXPORT_SYMBOL_GPL(acpi_dev_gpio_irq_wake_get_by); |
c884fbd4 | 1112 | |
473ed7be MW |
1113 | static acpi_status |
1114 | acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address, | |
1115 | u32 bits, u64 *value, void *handler_context, | |
1116 | void *region_context) | |
1117 | { | |
1118 | struct acpi_gpio_chip *achip = region_context; | |
1119 | struct gpio_chip *chip = achip->chip; | |
1120 | struct acpi_resource_gpio *agpio; | |
1121 | struct acpi_resource *ares; | |
74301f27 | 1122 | u16 pin_index = address; |
473ed7be | 1123 | acpi_status status; |
c15d821d | 1124 | int length; |
473ed7be MW |
1125 | int i; |
1126 | ||
1127 | status = acpi_buffer_to_resource(achip->conn_info.connection, | |
1128 | achip->conn_info.length, &ares); | |
1129 | if (ACPI_FAILURE(status)) | |
1130 | return status; | |
1131 | ||
1132 | if (WARN_ON(ares->type != ACPI_RESOURCE_TYPE_GPIO)) { | |
1133 | ACPI_FREE(ares); | |
1134 | return AE_BAD_PARAMETER; | |
1135 | } | |
1136 | ||
1137 | agpio = &ares->data.gpio; | |
473ed7be MW |
1138 | |
1139 | if (WARN_ON(agpio->io_restriction == ACPI_IO_RESTRICT_INPUT && | |
1140 | function == ACPI_WRITE)) { | |
1141 | ACPI_FREE(ares); | |
1142 | return AE_BAD_PARAMETER; | |
1143 | } | |
1144 | ||
74301f27 | 1145 | length = min_t(u16, agpio->pin_table_length, pin_index + bits); |
c15d821d | 1146 | for (i = pin_index; i < length; ++i) { |
0c2cae09 | 1147 | unsigned int pin = agpio->pin_table[i]; |
473ed7be MW |
1148 | struct acpi_gpio_connection *conn; |
1149 | struct gpio_desc *desc; | |
1150 | bool found; | |
1151 | ||
473ed7be MW |
1152 | mutex_lock(&achip->conn_lock); |
1153 | ||
1154 | found = false; | |
1155 | list_for_each_entry(conn, &achip->conns, node) { | |
e46cf32c | 1156 | if (conn->pin == pin) { |
473ed7be | 1157 | found = true; |
e46cf32c | 1158 | desc = conn->desc; |
473ed7be MW |
1159 | break; |
1160 | } | |
1161 | } | |
c103a10f MW |
1162 | |
1163 | /* | |
1164 | * The same GPIO can be shared between operation region and | |
1165 | * event but only if the access here is ACPI_READ. In that | |
1166 | * case we "borrow" the event GPIO instead. | |
1167 | */ | |
c163f90c | 1168 | if (!found && agpio->shareable == ACPI_SHARED && |
c103a10f MW |
1169 | function == ACPI_READ) { |
1170 | struct acpi_gpio_event *event; | |
1171 | ||
1172 | list_for_each_entry(event, &achip->events, node) { | |
1173 | if (event->pin == pin) { | |
1174 | desc = event->desc; | |
1175 | found = true; | |
1176 | break; | |
1177 | } | |
1178 | } | |
1179 | } | |
1180 | ||
473ed7be | 1181 | if (!found) { |
2e2b496c | 1182 | desc = acpi_request_own_gpiod(chip, agpio, i, "ACPI:OpRegion"); |
e46cf32c | 1183 | if (IS_ERR(desc)) { |
473ed7be | 1184 | mutex_unlock(&achip->conn_lock); |
ce698f4e | 1185 | status = AE_ERROR; |
473ed7be MW |
1186 | goto out; |
1187 | } | |
1188 | ||
473ed7be MW |
1189 | conn = kzalloc(sizeof(*conn), GFP_KERNEL); |
1190 | if (!conn) { | |
473ed7be MW |
1191 | gpiochip_free_own_desc(desc); |
1192 | mutex_unlock(&achip->conn_lock); | |
ce698f4e | 1193 | status = AE_NO_MEMORY; |
473ed7be MW |
1194 | goto out; |
1195 | } | |
1196 | ||
e46cf32c | 1197 | conn->pin = pin; |
473ed7be MW |
1198 | conn->desc = desc; |
1199 | list_add_tail(&conn->node, &achip->conns); | |
1200 | } | |
1201 | ||
1202 | mutex_unlock(&achip->conn_lock); | |
1203 | ||
1204 | if (function == ACPI_WRITE) | |
2c4d00cb | 1205 | gpiod_set_raw_value_cansleep(desc, !!(*value & BIT(i))); |
473ed7be | 1206 | else |
dc62b56a | 1207 | *value |= (u64)gpiod_get_raw_value_cansleep(desc) << i; |
473ed7be MW |
1208 | } |
1209 | ||
1210 | out: | |
1211 | ACPI_FREE(ares); | |
1212 | return status; | |
1213 | } | |
1214 | ||
1215 | static void acpi_gpiochip_request_regions(struct acpi_gpio_chip *achip) | |
1216 | { | |
1217 | struct gpio_chip *chip = achip->chip; | |
58383c78 | 1218 | acpi_handle handle = ACPI_HANDLE(chip->parent); |
473ed7be MW |
1219 | acpi_status status; |
1220 | ||
1221 | INIT_LIST_HEAD(&achip->conns); | |
1222 | mutex_init(&achip->conn_lock); | |
1223 | status = acpi_install_address_space_handler(handle, ACPI_ADR_SPACE_GPIO, | |
1224 | acpi_gpio_adr_space_handler, | |
1225 | NULL, achip); | |
1226 | if (ACPI_FAILURE(status)) | |
58383c78 LW |
1227 | dev_err(chip->parent, |
1228 | "Failed to install GPIO OpRegion handler\n"); | |
473ed7be MW |
1229 | } |
1230 | ||
1231 | static void acpi_gpiochip_free_regions(struct acpi_gpio_chip *achip) | |
1232 | { | |
1233 | struct gpio_chip *chip = achip->chip; | |
58383c78 | 1234 | acpi_handle handle = ACPI_HANDLE(chip->parent); |
473ed7be MW |
1235 | struct acpi_gpio_connection *conn, *tmp; |
1236 | acpi_status status; | |
1237 | ||
1238 | status = acpi_remove_address_space_handler(handle, ACPI_ADR_SPACE_GPIO, | |
1239 | acpi_gpio_adr_space_handler); | |
1240 | if (ACPI_FAILURE(status)) { | |
58383c78 LW |
1241 | dev_err(chip->parent, |
1242 | "Failed to remove GPIO OpRegion handler\n"); | |
473ed7be MW |
1243 | return; |
1244 | } | |
1245 | ||
1246 | list_for_each_entry_safe_reverse(conn, tmp, &achip->conns, node) { | |
1247 | gpiochip_free_own_desc(conn->desc); | |
1248 | list_del(&conn->node); | |
1249 | kfree(conn); | |
1250 | } | |
1251 | } | |
1252 | ||
fed7026a AS |
1253 | static struct gpio_desc * |
1254 | acpi_gpiochip_parse_own_gpio(struct acpi_gpio_chip *achip, | |
1255 | struct fwnode_handle *fwnode, | |
1256 | const char **name, | |
1257 | unsigned long *lflags, | |
80c8d927 | 1258 | enum gpiod_flags *dflags) |
c80f1ba7 MW |
1259 | { |
1260 | struct gpio_chip *chip = achip->chip; | |
1261 | struct gpio_desc *desc; | |
1262 | u32 gpios[2]; | |
1263 | int ret; | |
1264 | ||
2d6c06f5 | 1265 | *lflags = GPIO_LOOKUP_FLAGS_DEFAULT; |
32fa6552 | 1266 | *dflags = GPIOD_ASIS; |
c82064f2 AB |
1267 | *name = NULL; |
1268 | ||
c80f1ba7 MW |
1269 | ret = fwnode_property_read_u32_array(fwnode, "gpios", gpios, |
1270 | ARRAY_SIZE(gpios)); | |
1271 | if (ret < 0) | |
1272 | return ERR_PTR(ret); | |
1273 | ||
03c4749d | 1274 | desc = gpiochip_get_desc(chip, gpios[0]); |
c80f1ba7 MW |
1275 | if (IS_ERR(desc)) |
1276 | return desc; | |
1277 | ||
c80f1ba7 MW |
1278 | if (gpios[1]) |
1279 | *lflags |= GPIO_ACTIVE_LOW; | |
1280 | ||
1281 | if (fwnode_property_present(fwnode, "input")) | |
1282 | *dflags |= GPIOD_IN; | |
1283 | else if (fwnode_property_present(fwnode, "output-low")) | |
1284 | *dflags |= GPIOD_OUT_LOW; | |
1285 | else if (fwnode_property_present(fwnode, "output-high")) | |
1286 | *dflags |= GPIOD_OUT_HIGH; | |
1287 | else | |
1288 | return ERR_PTR(-EINVAL); | |
1289 | ||
1290 | fwnode_property_read_string(fwnode, "line-name", name); | |
1291 | ||
1292 | return desc; | |
1293 | } | |
1294 | ||
1295 | static void acpi_gpiochip_scan_gpios(struct acpi_gpio_chip *achip) | |
1296 | { | |
1297 | struct gpio_chip *chip = achip->chip; | |
1298 | struct fwnode_handle *fwnode; | |
1299 | ||
1300 | device_for_each_child_node(chip->parent, fwnode) { | |
fed7026a | 1301 | unsigned long lflags; |
80c8d927 | 1302 | enum gpiod_flags dflags; |
c80f1ba7 MW |
1303 | struct gpio_desc *desc; |
1304 | const char *name; | |
1305 | int ret; | |
1306 | ||
1307 | if (!fwnode_property_present(fwnode, "gpio-hog")) | |
1308 | continue; | |
1309 | ||
1310 | desc = acpi_gpiochip_parse_own_gpio(achip, fwnode, &name, | |
1311 | &lflags, &dflags); | |
1312 | if (IS_ERR(desc)) | |
1313 | continue; | |
1314 | ||
1315 | ret = gpiod_hog(desc, name, lflags, dflags); | |
1316 | if (ret) { | |
1317 | dev_err(chip->parent, "Failed to hog GPIO\n"); | |
1b6998c9 | 1318 | fwnode_handle_put(fwnode); |
c80f1ba7 MW |
1319 | return; |
1320 | } | |
1321 | } | |
1322 | } | |
1323 | ||
664e3e5a MW |
1324 | void acpi_gpiochip_add(struct gpio_chip *chip) |
1325 | { | |
aa92b6f6 | 1326 | struct acpi_gpio_chip *acpi_gpio; |
a9e10e58 | 1327 | struct acpi_device *adev; |
aa92b6f6 MW |
1328 | acpi_status status; |
1329 | ||
58383c78 | 1330 | if (!chip || !chip->parent) |
e9595f84 MW |
1331 | return; |
1332 | ||
a9e10e58 DS |
1333 | adev = ACPI_COMPANION(chip->parent); |
1334 | if (!adev) | |
aa92b6f6 MW |
1335 | return; |
1336 | ||
1337 | acpi_gpio = kzalloc(sizeof(*acpi_gpio), GFP_KERNEL); | |
1338 | if (!acpi_gpio) { | |
58383c78 | 1339 | dev_err(chip->parent, |
aa92b6f6 MW |
1340 | "Failed to allocate memory for ACPI GPIO chip\n"); |
1341 | return; | |
1342 | } | |
1343 | ||
1344 | acpi_gpio->chip = chip; | |
c103a10f | 1345 | INIT_LIST_HEAD(&acpi_gpio->events); |
78d3a92e | 1346 | INIT_LIST_HEAD(&acpi_gpio->deferred_req_irqs_list_entry); |
aa92b6f6 | 1347 | |
a9e10e58 | 1348 | status = acpi_attach_data(adev->handle, acpi_gpio_chip_dh, acpi_gpio); |
aa92b6f6 | 1349 | if (ACPI_FAILURE(status)) { |
58383c78 | 1350 | dev_err(chip->parent, "Failed to attach ACPI GPIO chip\n"); |
aa92b6f6 MW |
1351 | kfree(acpi_gpio); |
1352 | return; | |
1353 | } | |
1354 | ||
473ed7be | 1355 | acpi_gpiochip_request_regions(acpi_gpio); |
c80f1ba7 | 1356 | acpi_gpiochip_scan_gpios(acpi_gpio); |
a9e10e58 | 1357 | acpi_dev_clear_dependencies(adev); |
664e3e5a MW |
1358 | } |
1359 | ||
1360 | void acpi_gpiochip_remove(struct gpio_chip *chip) | |
1361 | { | |
aa92b6f6 MW |
1362 | struct acpi_gpio_chip *acpi_gpio; |
1363 | acpi_handle handle; | |
1364 | acpi_status status; | |
1365 | ||
58383c78 | 1366 | if (!chip || !chip->parent) |
e9595f84 MW |
1367 | return; |
1368 | ||
58383c78 | 1369 | handle = ACPI_HANDLE(chip->parent); |
aa92b6f6 MW |
1370 | if (!handle) |
1371 | return; | |
1372 | ||
1373 | status = acpi_get_data(handle, acpi_gpio_chip_dh, (void **)&acpi_gpio); | |
1374 | if (ACPI_FAILURE(status)) { | |
58383c78 | 1375 | dev_warn(chip->parent, "Failed to retrieve ACPI GPIO chip\n"); |
aa92b6f6 MW |
1376 | return; |
1377 | } | |
1378 | ||
473ed7be | 1379 | acpi_gpiochip_free_regions(acpi_gpio); |
aa92b6f6 MW |
1380 | |
1381 | acpi_detach_data(handle, acpi_gpio_chip_dh); | |
1382 | kfree(acpi_gpio); | |
664e3e5a | 1383 | } |
66858527 | 1384 | |
6f7194a1 | 1385 | static int acpi_gpio_package_count(const union acpi_object *obj) |
66858527 RI |
1386 | { |
1387 | const union acpi_object *element = obj->package.elements; | |
1388 | const union acpi_object *end = element + obj->package.count; | |
1389 | unsigned int count = 0; | |
1390 | ||
1391 | while (element < end) { | |
6f7194a1 MW |
1392 | switch (element->type) { |
1393 | case ACPI_TYPE_LOCAL_REFERENCE: | |
1394 | element += 3; | |
df561f66 | 1395 | fallthrough; |
6f7194a1 MW |
1396 | case ACPI_TYPE_INTEGER: |
1397 | element++; | |
66858527 | 1398 | count++; |
6f7194a1 | 1399 | break; |
66858527 | 1400 | |
6f7194a1 MW |
1401 | default: |
1402 | return -EPROTO; | |
1403 | } | |
66858527 | 1404 | } |
6f7194a1 | 1405 | |
66858527 RI |
1406 | return count; |
1407 | } | |
1408 | ||
1409 | static int acpi_find_gpio_count(struct acpi_resource *ares, void *data) | |
1410 | { | |
1411 | unsigned int *count = data; | |
1412 | ||
1413 | if (ares->type == ACPI_RESOURCE_TYPE_GPIO) | |
1414 | *count += ares->data.gpio.pin_table_length; | |
1415 | ||
1416 | return 1; | |
1417 | } | |
1418 | ||
1419 | /** | |
8122c7c6 AS |
1420 | * acpi_gpio_count - count the GPIOs associated with a firmware node / function |
1421 | * @fwnode: firmware node of the GPIO consumer | |
66858527 | 1422 | * @con_id: function within the GPIO consumer |
85edcd01 AS |
1423 | * |
1424 | * Return: | |
8122c7c6 | 1425 | * The number of GPIOs associated with a firmware node / function or %-ENOENT, |
85edcd01 | 1426 | * if no GPIO has been assigned to the requested function. |
66858527 | 1427 | */ |
8122c7c6 | 1428 | int acpi_gpio_count(const struct fwnode_handle *fwnode, const char *con_id) |
66858527 | 1429 | { |
8122c7c6 | 1430 | struct acpi_device *adev = to_acpi_device_node(fwnode); |
66858527 RI |
1431 | const union acpi_object *obj; |
1432 | const struct acpi_gpio_mapping *gm; | |
1433 | int count = -ENOENT; | |
1434 | int ret; | |
1435 | char propname[32]; | |
1436 | unsigned int i; | |
1437 | ||
1438 | /* Try first from _DSD */ | |
1439 | for (i = 0; i < ARRAY_SIZE(gpio_suffixes); i++) { | |
9e66504a | 1440 | if (con_id) |
66858527 RI |
1441 | snprintf(propname, sizeof(propname), "%s-%s", |
1442 | con_id, gpio_suffixes[i]); | |
1443 | else | |
1444 | snprintf(propname, sizeof(propname), "%s", | |
1445 | gpio_suffixes[i]); | |
1446 | ||
8122c7c6 | 1447 | ret = acpi_dev_get_property(adev, propname, ACPI_TYPE_ANY, &obj); |
66858527 RI |
1448 | if (ret == 0) { |
1449 | if (obj->type == ACPI_TYPE_LOCAL_REFERENCE) | |
1450 | count = 1; | |
1451 | else if (obj->type == ACPI_TYPE_PACKAGE) | |
1452 | count = acpi_gpio_package_count(obj); | |
1453 | } else if (adev->driver_gpios) { | |
1454 | for (gm = adev->driver_gpios; gm->name; gm++) | |
1455 | if (strcmp(propname, gm->name) == 0) { | |
1456 | count = gm->size; | |
1457 | break; | |
1458 | } | |
1459 | } | |
4ed55016 | 1460 | if (count > 0) |
66858527 RI |
1461 | break; |
1462 | } | |
1463 | ||
1464 | /* Then from plain _CRS GPIOs */ | |
1465 | if (count < 0) { | |
1466 | struct list_head resource_list; | |
1467 | unsigned int crs_count = 0; | |
1468 | ||
6fe9da42 AS |
1469 | if (!acpi_can_fallback_to_crs(adev, con_id)) |
1470 | return count; | |
1471 | ||
66858527 RI |
1472 | INIT_LIST_HEAD(&resource_list); |
1473 | acpi_dev_get_resources(adev, &resource_list, | |
1474 | acpi_find_gpio_count, &crs_count); | |
1475 | acpi_dev_free_resource_list(&resource_list); | |
1476 | if (crs_count > 0) | |
1477 | count = crs_count; | |
1478 | } | |
4ed55016 | 1479 | return count ? count : -ENOENT; |
66858527 | 1480 | } |
10cf4899 | 1481 | |
e59f5e08 | 1482 | /* Run deferred acpi_gpiochip_request_irqs() */ |
04fd1ca7 | 1483 | static int __init acpi_gpio_handle_deferred_request_irqs(void) |
ca876c74 | 1484 | { |
78d3a92e HG |
1485 | struct acpi_gpio_chip *acpi_gpio, *tmp; |
1486 | ||
1487 | mutex_lock(&acpi_gpio_deferred_req_irqs_lock); | |
1488 | list_for_each_entry_safe(acpi_gpio, tmp, | |
1489 | &acpi_gpio_deferred_req_irqs_list, | |
e59f5e08 HG |
1490 | deferred_req_irqs_list_entry) |
1491 | acpi_gpiochip_request_irqs(acpi_gpio); | |
78d3a92e HG |
1492 | |
1493 | acpi_gpio_deferred_req_irqs_done = true; | |
1494 | mutex_unlock(&acpi_gpio_deferred_req_irqs_lock); | |
ca876c74 BT |
1495 | |
1496 | return 0; | |
1497 | } | |
1498 | /* We must use _sync so that this runs after the first deferred_probe run */ | |
e59f5e08 | 1499 | late_initcall_sync(acpi_gpio_handle_deferred_request_irqs); |
61f7f7c8 | 1500 | |
04fd1ca7 | 1501 | static const struct dmi_system_id gpiolib_acpi_quirks[] __initconst = { |
61f7f7c8 | 1502 | { |
2727315d HG |
1503 | /* |
1504 | * The Minix Neo Z83-4 has a micro-USB-B id-pin handler for | |
1505 | * a non existing micro-USB-B connector which puts the HDMI | |
1506 | * DDC pins in GPIO mode, breaking HDMI support. | |
1507 | */ | |
61f7f7c8 HG |
1508 | .matches = { |
1509 | DMI_MATCH(DMI_SYS_VENDOR, "MINIX"), | |
1510 | DMI_MATCH(DMI_PRODUCT_NAME, "Z83-4"), | |
1ad1b540 | 1511 | }, |
2ccb21f5 HG |
1512 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { |
1513 | .no_edge_events_on_boot = true, | |
1514 | }, | |
61f7f7c8 | 1515 | }, |
2727315d HG |
1516 | { |
1517 | /* | |
1518 | * The Terra Pad 1061 has a micro-USB-B id-pin handler, which | |
1519 | * instead of controlling the actual micro-USB-B turns the 5V | |
1520 | * boost for its USB-A connector off. The actual micro-USB-B | |
1521 | * connector is wired for charging only. | |
1522 | */ | |
1523 | .matches = { | |
1524 | DMI_MATCH(DMI_SYS_VENDOR, "Wortmann_AG"), | |
1525 | DMI_MATCH(DMI_PRODUCT_NAME, "TERRA_PAD_1061"), | |
1ad1b540 | 1526 | }, |
2ccb21f5 HG |
1527 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { |
1528 | .no_edge_events_on_boot = true, | |
1529 | }, | |
2727315d | 1530 | }, |
da91ece2 HG |
1531 | { |
1532 | /* | |
1533 | * The Dell Venue 10 Pro 5055, with Bay Trail SoC + TI PMIC uses an | |
1534 | * external embedded-controller connected via I2C + an ACPI GPIO | |
1535 | * event handler on INT33FFC:02 pin 12, causing spurious wakeups. | |
1536 | */ | |
1537 | .matches = { | |
1538 | DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), | |
1539 | DMI_MATCH(DMI_PRODUCT_NAME, "Venue 10 Pro 5055"), | |
1540 | }, | |
1541 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { | |
1542 | .ignore_wake = "INT33FC:02@12", | |
1543 | }, | |
1544 | }, | |
aa23ca3d HG |
1545 | { |
1546 | /* | |
efaa87fa HG |
1547 | * HP X2 10 models with Cherry Trail SoC + TI PMIC use an |
1548 | * external embedded-controller connected via I2C + an ACPI GPIO | |
1549 | * event handler on INT33FF:01 pin 0, causing spurious wakeups. | |
1550 | * When suspending by closing the LID, the power to the USB | |
1551 | * keyboard is turned off, causing INT0002 ACPI events to | |
1552 | * trigger once the XHCI controller notices the keyboard is | |
1553 | * gone. So INT0002 events cause spurious wakeups too. Ignoring | |
1554 | * EC wakes breaks wakeup when opening the lid, the user needs | |
aa23ca3d HG |
1555 | * to press the power-button to wakeup the system. The |
1556 | * alternative is suspend simply not working, which is worse. | |
1557 | */ | |
1558 | .matches = { | |
1559 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
1560 | DMI_MATCH(DMI_PRODUCT_NAME, "HP x2 Detachable 10-p0XX"), | |
1561 | }, | |
2ccb21f5 HG |
1562 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { |
1563 | .ignore_wake = "INT33FF:01@0,INT0002:00@2", | |
1564 | }, | |
aa23ca3d | 1565 | }, |
0e91506b HG |
1566 | { |
1567 | /* | |
1568 | * HP X2 10 models with Bay Trail SoC + AXP288 PMIC use an | |
1569 | * external embedded-controller connected via I2C + an ACPI GPIO | |
1570 | * event handler on INT33FC:02 pin 28, causing spurious wakeups. | |
1571 | */ | |
1572 | .matches = { | |
1573 | DMI_MATCH(DMI_SYS_VENDOR, "Hewlett-Packard"), | |
1574 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion x2 Detachable"), | |
1575 | DMI_MATCH(DMI_BOARD_NAME, "815D"), | |
1576 | }, | |
1577 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { | |
1578 | .ignore_wake = "INT33FC:02@28", | |
1579 | }, | |
1580 | }, | |
0c625ccf HG |
1581 | { |
1582 | /* | |
1583 | * HP X2 10 models with Cherry Trail SoC + AXP288 PMIC use an | |
1584 | * external embedded-controller connected via I2C + an ACPI GPIO | |
1585 | * event handler on INT33FF:01 pin 0, causing spurious wakeups. | |
1586 | */ | |
1587 | .matches = { | |
1588 | DMI_MATCH(DMI_SYS_VENDOR, "HP"), | |
1589 | DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion x2 Detachable"), | |
1590 | DMI_MATCH(DMI_BOARD_NAME, "813E"), | |
1591 | }, | |
1592 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { | |
1593 | .ignore_wake = "INT33FF:01@0", | |
1594 | }, | |
1595 | }, | |
0ea76c40 ML |
1596 | { |
1597 | /* | |
1598 | * Interrupt storm caused from edge triggered floating pin | |
1599 | * Found in BIOS UX325UAZ.300 | |
1600 | * https://bugzilla.kernel.org/show_bug.cgi?id=216208 | |
1601 | */ | |
1602 | .matches = { | |
1603 | DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), | |
1604 | DMI_MATCH(DMI_PRODUCT_NAME, "ZenBook UX325UAZ_UM325UAZ"), | |
1605 | }, | |
1606 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { | |
1607 | .ignore_interrupt = "AMDI0030:00@18", | |
1608 | }, | |
1609 | }, | |
782eea0c WS |
1610 | { |
1611 | /* | |
1612 | * Spurious wakeups from TP_ATTN# pin | |
1613 | * Found in BIOS 1.7.8 | |
1614 | * https://gitlab.freedesktop.org/drm/amd/-/issues/1722#note_1720627 | |
1615 | */ | |
1616 | .matches = { | |
1617 | DMI_MATCH(DMI_BOARD_NAME, "NL5xNU"), | |
1618 | }, | |
1619 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { | |
1620 | .ignore_wake = "ELAN0415:00@9", | |
1621 | }, | |
1622 | }, | |
4cb78618 ML |
1623 | { |
1624 | /* | |
1625 | * Spurious wakeups from TP_ATTN# pin | |
1626 | * Found in BIOS 1.7.8 | |
1627 | * https://gitlab.freedesktop.org/drm/amd/-/issues/1722#note_1720627 | |
1628 | */ | |
1629 | .matches = { | |
1630 | DMI_MATCH(DMI_BOARD_NAME, "NL5xRU"), | |
1631 | }, | |
1632 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { | |
1633 | .ignore_wake = "ELAN0415:00@9", | |
1634 | }, | |
1635 | }, | |
a69982c3 WS |
1636 | { |
1637 | /* | |
1638 | * Spurious wakeups from TP_ATTN# pin | |
1639 | * Found in BIOS 1.7.7 | |
1640 | */ | |
1641 | .matches = { | |
1642 | DMI_MATCH(DMI_BOARD_NAME, "NH5xAx"), | |
1643 | }, | |
1644 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { | |
1645 | .ignore_wake = "SYNA1202:00@16", | |
1646 | }, | |
1647 | }, | |
6cc64f61 HG |
1648 | { |
1649 | /* | |
1650 | * On the Peaq C1010 2-in-1 INT33FC:00 pin 3 is connected to | |
1651 | * a "dolby" button. At the ACPI level an _AEI event-handler | |
1652 | * is connected which sets an ACPI variable to 1 on both | |
1653 | * edges. This variable can be polled + cleared to 0 using | |
1654 | * WMI. But since the variable is set on both edges the WMI | |
1655 | * interface is pretty useless even when polling. | |
1656 | * So instead the x86-android-tablets code instantiates | |
1657 | * a gpio-keys platform device for it. | |
1658 | * Ignore the _AEI handler for the pin, so that it is not busy. | |
1659 | */ | |
1660 | .matches = { | |
1661 | DMI_MATCH(DMI_SYS_VENDOR, "PEAQ"), | |
1662 | DMI_MATCH(DMI_PRODUCT_NAME, "PEAQ PMM C1010 MD99187"), | |
1663 | }, | |
1664 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { | |
1665 | .ignore_interrupt = "INT33FC:00@3", | |
1666 | }, | |
1667 | }, | |
805c74ea ML |
1668 | { |
1669 | /* | |
1670 | * Spurious wakeups from TP_ATTN# pin | |
1671 | * Found in BIOS 0.35 | |
1672 | * https://gitlab.freedesktop.org/drm/amd/-/issues/3073 | |
1673 | */ | |
1674 | .matches = { | |
1675 | DMI_MATCH(DMI_SYS_VENDOR, "GPD"), | |
1676 | DMI_MATCH(DMI_PRODUCT_NAME, "G1619-04"), | |
1677 | }, | |
1678 | .driver_data = &(struct acpi_gpiolib_dmi_quirk) { | |
1679 | .ignore_wake = "PNP0C50:00@8", | |
1680 | }, | |
1681 | }, | |
61f7f7c8 HG |
1682 | {} /* Terminating entry */ |
1683 | }; | |
1684 | ||
04fd1ca7 | 1685 | static int __init acpi_gpio_setup_params(void) |
61f7f7c8 | 1686 | { |
2ccb21f5 | 1687 | const struct acpi_gpiolib_dmi_quirk *quirk = NULL; |
1ad1b540 | 1688 | const struct dmi_system_id *id; |
1ad1b540 HG |
1689 | |
1690 | id = dmi_first_match(gpiolib_acpi_quirks); | |
1691 | if (id) | |
2ccb21f5 | 1692 | quirk = id->driver_data; |
1ad1b540 | 1693 | |
61f7f7c8 | 1694 | if (run_edge_events_on_boot < 0) { |
2ccb21f5 | 1695 | if (quirk && quirk->no_edge_events_on_boot) |
61f7f7c8 HG |
1696 | run_edge_events_on_boot = 0; |
1697 | else | |
1698 | run_edge_events_on_boot = 1; | |
1699 | } | |
1700 | ||
2ccb21f5 HG |
1701 | if (ignore_wake == NULL && quirk && quirk->ignore_wake) |
1702 | ignore_wake = quirk->ignore_wake; | |
aa23ca3d | 1703 | |
6b6af7bd ML |
1704 | if (ignore_interrupt == NULL && quirk && quirk->ignore_interrupt) |
1705 | ignore_interrupt = quirk->ignore_interrupt; | |
1706 | ||
61f7f7c8 HG |
1707 | return 0; |
1708 | } | |
1709 | ||
1710 | /* Directly after dmi_setup() which runs as core_initcall() */ | |
1711 | postcore_initcall(acpi_gpio_setup_params); |