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Commit | Line | Data |
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96495d90 SG |
1 | /* |
2 | * Copyright (c) 2013 Google, Inc | |
3 | * | |
4 | * SPDX-License-Identifier: GPL-2.0+ | |
5 | */ | |
6 | ||
7 | #include <common.h> | |
8 | #include <dm.h> | |
6c880b77 | 9 | #include <dt-bindings/gpio/gpio.h> |
96495d90 | 10 | #include <errno.h> |
0dac4d51 | 11 | #include <fdtdec.h> |
b892d127 | 12 | #include <malloc.h> |
96495d90 | 13 | #include <asm/gpio.h> |
84b8bf6d | 14 | #include <linux/bug.h> |
fe1ef503 | 15 | #include <linux/ctype.h> |
96495d90 | 16 | |
3669e0e7 SG |
17 | DECLARE_GLOBAL_DATA_PTR; |
18 | ||
96495d90 SG |
19 | /** |
20 | * gpio_to_device() - Convert global GPIO number to device, number | |
96495d90 SG |
21 | * |
22 | * Convert the GPIO number to an entry in the list of GPIOs | |
23 | * or GPIO blocks registered with the GPIO controller. Returns | |
24 | * entry on success, NULL on error. | |
ae7123f8 SG |
25 | * |
26 | * @gpio: The numeric representation of the GPIO | |
27 | * @desc: Returns description (desc->flags will always be 0) | |
28 | * @return 0 if found, -ENOENT if not found | |
96495d90 | 29 | */ |
ae7123f8 | 30 | static int gpio_to_device(unsigned int gpio, struct gpio_desc *desc) |
96495d90 SG |
31 | { |
32 | struct gpio_dev_priv *uc_priv; | |
54c5d08a | 33 | struct udevice *dev; |
96495d90 SG |
34 | int ret; |
35 | ||
36 | for (ret = uclass_first_device(UCLASS_GPIO, &dev); | |
37 | dev; | |
38 | ret = uclass_next_device(&dev)) { | |
e564f054 | 39 | uc_priv = dev_get_uclass_priv(dev); |
96495d90 SG |
40 | if (gpio >= uc_priv->gpio_base && |
41 | gpio < uc_priv->gpio_base + uc_priv->gpio_count) { | |
ae7123f8 SG |
42 | desc->dev = dev; |
43 | desc->offset = gpio - uc_priv->gpio_base; | |
44 | desc->flags = 0; | |
96495d90 SG |
45 | return 0; |
46 | } | |
47 | } | |
48 | ||
49 | /* No such GPIO */ | |
ae7123f8 | 50 | return ret ? ret : -ENOENT; |
96495d90 SG |
51 | } |
52 | ||
32ec1598 | 53 | int dm_gpio_lookup_name(const char *name, struct gpio_desc *desc) |
96495d90 | 54 | { |
fe1ef503 | 55 | struct gpio_dev_priv *uc_priv = NULL; |
54c5d08a | 56 | struct udevice *dev; |
fe1ef503 SG |
57 | ulong offset; |
58 | int numeric; | |
96495d90 SG |
59 | int ret; |
60 | ||
fe1ef503 | 61 | numeric = isdigit(*name) ? simple_strtoul(name, NULL, 10) : -1; |
96495d90 SG |
62 | for (ret = uclass_first_device(UCLASS_GPIO, &dev); |
63 | dev; | |
64 | ret = uclass_next_device(&dev)) { | |
96495d90 SG |
65 | int len; |
66 | ||
e564f054 | 67 | uc_priv = dev_get_uclass_priv(dev); |
fe1ef503 SG |
68 | if (numeric != -1) { |
69 | offset = numeric - uc_priv->gpio_base; | |
70 | /* Allow GPIOs to be numbered from 0 */ | |
71 | if (offset >= 0 && offset < uc_priv->gpio_count) | |
72 | break; | |
73 | } | |
74 | ||
96495d90 SG |
75 | len = uc_priv->bank_name ? strlen(uc_priv->bank_name) : 0; |
76 | ||
939cda5b | 77 | if (!strncasecmp(name, uc_priv->bank_name, len)) { |
fe1ef503 SG |
78 | if (!strict_strtoul(name + len, 10, &offset)) |
79 | break; | |
96495d90 SG |
80 | } |
81 | } | |
82 | ||
fe1ef503 SG |
83 | if (!dev) |
84 | return ret ? ret : -EINVAL; | |
85 | ||
32ec1598 SG |
86 | desc->dev = dev; |
87 | desc->offset = offset; | |
88 | ||
89 | return 0; | |
90 | } | |
91 | ||
92 | int gpio_lookup_name(const char *name, struct udevice **devp, | |
93 | unsigned int *offsetp, unsigned int *gpiop) | |
94 | { | |
95 | struct gpio_desc desc; | |
96 | int ret; | |
97 | ||
fe1ef503 | 98 | if (devp) |
32ec1598 SG |
99 | *devp = NULL; |
100 | ret = dm_gpio_lookup_name(name, &desc); | |
101 | if (ret) | |
102 | return ret; | |
103 | ||
104 | if (devp) | |
105 | *devp = desc.dev; | |
fe1ef503 | 106 | if (offsetp) |
32ec1598 SG |
107 | *offsetp = desc.offset; |
108 | if (gpiop) { | |
109 | struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(desc.dev); | |
110 | ||
111 | *gpiop = uc_priv->gpio_base + desc.offset; | |
112 | } | |
fe1ef503 SG |
113 | |
114 | return 0; | |
96495d90 SG |
115 | } |
116 | ||
6c880b77 EN |
117 | int gpio_xlate_offs_flags(struct udevice *dev, |
118 | struct gpio_desc *desc, | |
119 | struct fdtdec_phandle_args *args) | |
120 | { | |
121 | if (args->args_count < 1) | |
122 | return -EINVAL; | |
123 | ||
124 | desc->offset = args->args[0]; | |
125 | ||
126 | if (args->args_count < 2) | |
127 | return 0; | |
128 | ||
129 | if (args->args[1] & GPIO_ACTIVE_LOW) | |
130 | desc->flags = GPIOD_ACTIVE_LOW; | |
131 | ||
132 | return 0; | |
133 | } | |
134 | ||
3669e0e7 SG |
135 | static int gpio_find_and_xlate(struct gpio_desc *desc, |
136 | struct fdtdec_phandle_args *args) | |
0dac4d51 SG |
137 | { |
138 | struct dm_gpio_ops *ops = gpio_get_ops(desc->dev); | |
139 | ||
6c880b77 EN |
140 | if (ops->xlate) |
141 | return ops->xlate(desc->dev, desc, args); | |
0dac4d51 | 142 | else |
6c880b77 | 143 | return gpio_xlate_offs_flags(desc->dev, desc, args); |
0dac4d51 SG |
144 | } |
145 | ||
efa677fb | 146 | int dm_gpio_request(struct gpio_desc *desc, const char *label) |
ae7123f8 SG |
147 | { |
148 | struct udevice *dev = desc->dev; | |
149 | struct gpio_dev_priv *uc_priv; | |
150 | char *str; | |
151 | int ret; | |
152 | ||
e564f054 | 153 | uc_priv = dev_get_uclass_priv(dev); |
ae7123f8 SG |
154 | if (uc_priv->name[desc->offset]) |
155 | return -EBUSY; | |
156 | str = strdup(label); | |
157 | if (!str) | |
158 | return -ENOMEM; | |
159 | if (gpio_get_ops(dev)->request) { | |
160 | ret = gpio_get_ops(dev)->request(dev, desc->offset, label); | |
161 | if (ret) { | |
162 | free(str); | |
163 | return ret; | |
164 | } | |
165 | } | |
166 | uc_priv->name[desc->offset] = str; | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
3669e0e7 SG |
171 | static int dm_gpio_requestf(struct gpio_desc *desc, const char *fmt, ...) |
172 | { | |
4dc5259a | 173 | #if !defined(CONFIG_SPL_BUILD) || !defined(CONFIG_USE_TINY_PRINTF) |
3669e0e7 SG |
174 | va_list args; |
175 | char buf[40]; | |
176 | ||
177 | va_start(args, fmt); | |
178 | vscnprintf(buf, sizeof(buf), fmt, args); | |
179 | va_end(args); | |
180 | return dm_gpio_request(desc, buf); | |
4dc5259a SG |
181 | #else |
182 | return dm_gpio_request(desc, fmt); | |
183 | #endif | |
3669e0e7 SG |
184 | } |
185 | ||
96495d90 SG |
186 | /** |
187 | * gpio_request() - [COMPAT] Request GPIO | |
188 | * gpio: GPIO number | |
189 | * label: Name for the requested GPIO | |
190 | * | |
b892d127 SG |
191 | * The label is copied and allocated so the caller does not need to keep |
192 | * the pointer around. | |
193 | * | |
96495d90 SG |
194 | * This function implements the API that's compatible with current |
195 | * GPIO API used in U-Boot. The request is forwarded to particular | |
196 | * GPIO driver. Returns 0 on success, negative value on error. | |
197 | */ | |
198 | int gpio_request(unsigned gpio, const char *label) | |
199 | { | |
ae7123f8 | 200 | struct gpio_desc desc; |
96495d90 SG |
201 | int ret; |
202 | ||
ae7123f8 | 203 | ret = gpio_to_device(gpio, &desc); |
96495d90 SG |
204 | if (ret) |
205 | return ret; | |
206 | ||
ae7123f8 | 207 | return dm_gpio_request(&desc, label); |
96495d90 SG |
208 | } |
209 | ||
d44f597b SG |
210 | /** |
211 | * gpio_requestf() - [COMPAT] Request GPIO | |
212 | * @gpio: GPIO number | |
213 | * @fmt: Format string for the requested GPIO | |
214 | * @...: Arguments for the printf() format string | |
215 | * | |
216 | * This function implements the API that's compatible with current | |
217 | * GPIO API used in U-Boot. The request is forwarded to particular | |
218 | * GPIO driver. Returns 0 on success, negative value on error. | |
219 | */ | |
220 | int gpio_requestf(unsigned gpio, const char *fmt, ...) | |
221 | { | |
4dc5259a | 222 | #if !defined(CONFIG_SPL_BUILD) || !defined(CONFIG_USE_TINY_PRINTF) |
d44f597b SG |
223 | va_list args; |
224 | char buf[40]; | |
225 | ||
226 | va_start(args, fmt); | |
227 | vscnprintf(buf, sizeof(buf), fmt, args); | |
228 | va_end(args); | |
229 | return gpio_request(gpio, buf); | |
4dc5259a SG |
230 | #else |
231 | return gpio_request(gpio, fmt); | |
232 | #endif | |
d44f597b SG |
233 | } |
234 | ||
ae7123f8 | 235 | int _dm_gpio_free(struct udevice *dev, uint offset) |
96495d90 | 236 | { |
b892d127 | 237 | struct gpio_dev_priv *uc_priv; |
96495d90 SG |
238 | int ret; |
239 | ||
e564f054 | 240 | uc_priv = dev_get_uclass_priv(dev); |
b892d127 SG |
241 | if (!uc_priv->name[offset]) |
242 | return -ENXIO; | |
243 | if (gpio_get_ops(dev)->free) { | |
244 | ret = gpio_get_ops(dev)->free(dev, offset); | |
245 | if (ret) | |
246 | return ret; | |
247 | } | |
248 | ||
249 | free(uc_priv->name[offset]); | |
250 | uc_priv->name[offset] = NULL; | |
251 | ||
252 | return 0; | |
253 | } | |
254 | ||
ae7123f8 SG |
255 | /** |
256 | * gpio_free() - [COMPAT] Relinquish GPIO | |
257 | * gpio: GPIO number | |
258 | * | |
259 | * This function implements the API that's compatible with current | |
260 | * GPIO API used in U-Boot. The request is forwarded to particular | |
261 | * GPIO driver. Returns 0 on success, negative value on error. | |
262 | */ | |
263 | int gpio_free(unsigned gpio) | |
b892d127 | 264 | { |
ae7123f8 SG |
265 | struct gpio_desc desc; |
266 | int ret; | |
267 | ||
268 | ret = gpio_to_device(gpio, &desc); | |
269 | if (ret) | |
270 | return ret; | |
271 | ||
272 | return _dm_gpio_free(desc.dev, desc.offset); | |
273 | } | |
b892d127 | 274 | |
17c43f1a | 275 | static int check_reserved(const struct gpio_desc *desc, const char *func) |
ae7123f8 | 276 | { |
eca48665 SG |
277 | struct gpio_dev_priv *uc_priv; |
278 | ||
279 | if (!dm_gpio_is_valid(desc)) | |
280 | return -ENOENT; | |
ae7123f8 | 281 | |
eca48665 | 282 | uc_priv = dev_get_uclass_priv(desc->dev); |
ae7123f8 | 283 | if (!uc_priv->name[desc->offset]) { |
b892d127 | 284 | printf("%s: %s: error: gpio %s%d not reserved\n", |
ae7123f8 SG |
285 | desc->dev->name, func, |
286 | uc_priv->bank_name ? uc_priv->bank_name : "", | |
287 | desc->offset); | |
b892d127 SG |
288 | return -EBUSY; |
289 | } | |
290 | ||
291 | return 0; | |
96495d90 SG |
292 | } |
293 | ||
294 | /** | |
295 | * gpio_direction_input() - [COMPAT] Set GPIO direction to input | |
296 | * gpio: GPIO number | |
297 | * | |
298 | * This function implements the API that's compatible with current | |
299 | * GPIO API used in U-Boot. The request is forwarded to particular | |
300 | * GPIO driver. Returns 0 on success, negative value on error. | |
301 | */ | |
302 | int gpio_direction_input(unsigned gpio) | |
303 | { | |
ae7123f8 | 304 | struct gpio_desc desc; |
96495d90 SG |
305 | int ret; |
306 | ||
ae7123f8 SG |
307 | ret = gpio_to_device(gpio, &desc); |
308 | if (ret) | |
309 | return ret; | |
310 | ret = check_reserved(&desc, "dir_input"); | |
96495d90 SG |
311 | if (ret) |
312 | return ret; | |
313 | ||
ae7123f8 | 314 | return gpio_get_ops(desc.dev)->direction_input(desc.dev, desc.offset); |
96495d90 SG |
315 | } |
316 | ||
317 | /** | |
318 | * gpio_direction_output() - [COMPAT] Set GPIO direction to output and set value | |
319 | * gpio: GPIO number | |
320 | * value: Logical value to be set on the GPIO pin | |
321 | * | |
322 | * This function implements the API that's compatible with current | |
323 | * GPIO API used in U-Boot. The request is forwarded to particular | |
324 | * GPIO driver. Returns 0 on success, negative value on error. | |
325 | */ | |
326 | int gpio_direction_output(unsigned gpio, int value) | |
327 | { | |
ae7123f8 | 328 | struct gpio_desc desc; |
96495d90 SG |
329 | int ret; |
330 | ||
ae7123f8 SG |
331 | ret = gpio_to_device(gpio, &desc); |
332 | if (ret) | |
333 | return ret; | |
334 | ret = check_reserved(&desc, "dir_output"); | |
335 | if (ret) | |
336 | return ret; | |
337 | ||
338 | return gpio_get_ops(desc.dev)->direction_output(desc.dev, | |
339 | desc.offset, value); | |
340 | } | |
341 | ||
17c43f1a | 342 | int dm_gpio_get_value(const struct gpio_desc *desc) |
ae7123f8 SG |
343 | { |
344 | int value; | |
345 | int ret; | |
346 | ||
347 | ret = check_reserved(desc, "get_value"); | |
96495d90 SG |
348 | if (ret) |
349 | return ret; | |
350 | ||
ae7123f8 SG |
351 | value = gpio_get_ops(desc->dev)->get_value(desc->dev, desc->offset); |
352 | ||
353 | return desc->flags & GPIOD_ACTIVE_LOW ? !value : value; | |
354 | } | |
355 | ||
17c43f1a | 356 | int dm_gpio_set_value(const struct gpio_desc *desc, int value) |
ae7123f8 SG |
357 | { |
358 | int ret; | |
359 | ||
360 | ret = check_reserved(desc, "set_value"); | |
361 | if (ret) | |
362 | return ret; | |
363 | ||
364 | if (desc->flags & GPIOD_ACTIVE_LOW) | |
365 | value = !value; | |
366 | gpio_get_ops(desc->dev)->set_value(desc->dev, desc->offset, value); | |
367 | return 0; | |
368 | } | |
369 | ||
370 | int dm_gpio_set_dir_flags(struct gpio_desc *desc, ulong flags) | |
371 | { | |
372 | struct udevice *dev = desc->dev; | |
373 | struct dm_gpio_ops *ops = gpio_get_ops(dev); | |
374 | int ret; | |
375 | ||
376 | ret = check_reserved(desc, "set_dir"); | |
377 | if (ret) | |
378 | return ret; | |
379 | ||
380 | if (flags & GPIOD_IS_OUT) { | |
381 | int value = flags & GPIOD_IS_OUT_ACTIVE ? 1 : 0; | |
382 | ||
383 | if (flags & GPIOD_ACTIVE_LOW) | |
384 | value = !value; | |
385 | ret = ops->direction_output(dev, desc->offset, value); | |
386 | } else if (flags & GPIOD_IS_IN) { | |
387 | ret = ops->direction_input(dev, desc->offset); | |
388 | } | |
389 | if (ret) | |
390 | return ret; | |
391 | /* | |
392 | * Update desc->flags here, so that GPIO_ACTIVE_LOW is honoured in | |
393 | * futures | |
394 | */ | |
395 | desc->flags = flags; | |
396 | ||
397 | return 0; | |
398 | } | |
399 | ||
400 | int dm_gpio_set_dir(struct gpio_desc *desc) | |
401 | { | |
402 | return dm_gpio_set_dir_flags(desc, desc->flags); | |
96495d90 SG |
403 | } |
404 | ||
405 | /** | |
406 | * gpio_get_value() - [COMPAT] Sample GPIO pin and return it's value | |
407 | * gpio: GPIO number | |
408 | * | |
409 | * This function implements the API that's compatible with current | |
410 | * GPIO API used in U-Boot. The request is forwarded to particular | |
411 | * GPIO driver. Returns the value of the GPIO pin, or negative value | |
412 | * on error. | |
413 | */ | |
414 | int gpio_get_value(unsigned gpio) | |
415 | { | |
96495d90 SG |
416 | int ret; |
417 | ||
ae7123f8 SG |
418 | struct gpio_desc desc; |
419 | ||
420 | ret = gpio_to_device(gpio, &desc); | |
96495d90 SG |
421 | if (ret) |
422 | return ret; | |
ae7123f8 | 423 | return dm_gpio_get_value(&desc); |
96495d90 SG |
424 | } |
425 | ||
426 | /** | |
427 | * gpio_set_value() - [COMPAT] Configure logical value on GPIO pin | |
428 | * gpio: GPIO number | |
429 | * value: Logical value to be set on the GPIO pin. | |
430 | * | |
431 | * This function implements the API that's compatible with current | |
432 | * GPIO API used in U-Boot. The request is forwarded to particular | |
433 | * GPIO driver. Returns 0 on success, negative value on error. | |
434 | */ | |
435 | int gpio_set_value(unsigned gpio, int value) | |
436 | { | |
ae7123f8 | 437 | struct gpio_desc desc; |
96495d90 SG |
438 | int ret; |
439 | ||
ae7123f8 | 440 | ret = gpio_to_device(gpio, &desc); |
96495d90 SG |
441 | if (ret) |
442 | return ret; | |
ae7123f8 | 443 | return dm_gpio_set_value(&desc, value); |
96495d90 SG |
444 | } |
445 | ||
54c5d08a | 446 | const char *gpio_get_bank_info(struct udevice *dev, int *bit_count) |
96495d90 SG |
447 | { |
448 | struct gpio_dev_priv *priv; | |
449 | ||
450 | /* Must be called on an active device */ | |
e564f054 | 451 | priv = dev_get_uclass_priv(dev); |
96495d90 SG |
452 | assert(priv); |
453 | ||
454 | *bit_count = priv->gpio_count; | |
455 | return priv->bank_name; | |
456 | } | |
457 | ||
6449a506 SG |
458 | static const char * const gpio_function[GPIOF_COUNT] = { |
459 | "input", | |
460 | "output", | |
461 | "unused", | |
462 | "unknown", | |
463 | "func", | |
464 | }; | |
465 | ||
466 | int get_function(struct udevice *dev, int offset, bool skip_unused, | |
467 | const char **namep) | |
468 | { | |
e564f054 | 469 | struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); |
6449a506 SG |
470 | struct dm_gpio_ops *ops = gpio_get_ops(dev); |
471 | ||
472 | BUILD_BUG_ON(GPIOF_COUNT != ARRAY_SIZE(gpio_function)); | |
473 | if (!device_active(dev)) | |
474 | return -ENODEV; | |
475 | if (offset < 0 || offset >= uc_priv->gpio_count) | |
476 | return -EINVAL; | |
477 | if (namep) | |
478 | *namep = uc_priv->name[offset]; | |
479 | if (skip_unused && !uc_priv->name[offset]) | |
480 | return GPIOF_UNUSED; | |
481 | if (ops->get_function) { | |
482 | int ret; | |
483 | ||
484 | ret = ops->get_function(dev, offset); | |
485 | if (ret < 0) | |
486 | return ret; | |
487 | if (ret >= ARRAY_SIZE(gpio_function)) | |
488 | return -ENODATA; | |
489 | return ret; | |
490 | } | |
491 | ||
492 | return GPIOF_UNKNOWN; | |
493 | } | |
494 | ||
495 | int gpio_get_function(struct udevice *dev, int offset, const char **namep) | |
496 | { | |
497 | return get_function(dev, offset, true, namep); | |
498 | } | |
499 | ||
500 | int gpio_get_raw_function(struct udevice *dev, int offset, const char **namep) | |
501 | { | |
502 | return get_function(dev, offset, false, namep); | |
503 | } | |
504 | ||
0757535a SG |
505 | int gpio_get_status(struct udevice *dev, int offset, char *buf, int buffsize) |
506 | { | |
507 | struct dm_gpio_ops *ops = gpio_get_ops(dev); | |
508 | struct gpio_dev_priv *priv; | |
509 | char *str = buf; | |
510 | int func; | |
511 | int ret; | |
512 | int len; | |
513 | ||
514 | BUILD_BUG_ON(GPIOF_COUNT != ARRAY_SIZE(gpio_function)); | |
515 | ||
516 | *buf = 0; | |
e564f054 | 517 | priv = dev_get_uclass_priv(dev); |
0757535a SG |
518 | ret = gpio_get_raw_function(dev, offset, NULL); |
519 | if (ret < 0) | |
520 | return ret; | |
521 | func = ret; | |
522 | len = snprintf(str, buffsize, "%s%d: %s", | |
523 | priv->bank_name ? priv->bank_name : "", | |
524 | offset, gpio_function[func]); | |
525 | if (func == GPIOF_INPUT || func == GPIOF_OUTPUT || | |
526 | func == GPIOF_UNUSED) { | |
527 | const char *label; | |
528 | bool used; | |
529 | ||
530 | ret = ops->get_value(dev, offset); | |
531 | if (ret < 0) | |
532 | return ret; | |
533 | used = gpio_get_function(dev, offset, &label) != GPIOF_UNUSED; | |
534 | snprintf(str + len, buffsize - len, ": %d [%c]%s%s", | |
535 | ret, | |
536 | used ? 'x' : ' ', | |
537 | used ? " " : "", | |
538 | label ? label : ""); | |
539 | } | |
540 | ||
541 | return 0; | |
542 | } | |
543 | ||
962f5caf SG |
544 | int gpio_claim_vector(const int *gpio_num_array, const char *fmt) |
545 | { | |
546 | int i, ret; | |
547 | int gpio; | |
548 | ||
549 | for (i = 0; i < 32; i++) { | |
550 | gpio = gpio_num_array[i]; | |
551 | if (gpio == -1) | |
552 | break; | |
553 | ret = gpio_requestf(gpio, fmt, i); | |
554 | if (ret) | |
555 | goto err; | |
556 | ret = gpio_direction_input(gpio); | |
557 | if (ret) { | |
558 | gpio_free(gpio); | |
559 | goto err; | |
560 | } | |
561 | } | |
562 | ||
563 | return 0; | |
564 | err: | |
565 | for (i--; i >= 0; i--) | |
566 | gpio_free(gpio_num_array[i]); | |
567 | ||
568 | return ret; | |
569 | } | |
570 | ||
e5901c94 SG |
571 | /* |
572 | * get a number comprised of multiple GPIO values. gpio_num_array points to | |
573 | * the array of gpio pin numbers to scan, terminated by -1. | |
574 | */ | |
962f5caf | 575 | int gpio_get_values_as_int(const int *gpio_list) |
e5901c94 SG |
576 | { |
577 | int gpio; | |
578 | unsigned bitmask = 1; | |
579 | unsigned vector = 0; | |
962f5caf | 580 | int ret; |
e5901c94 SG |
581 | |
582 | while (bitmask && | |
962f5caf SG |
583 | ((gpio = *gpio_list++) != -1)) { |
584 | ret = gpio_get_value(gpio); | |
585 | if (ret < 0) | |
586 | return ret; | |
587 | else if (ret) | |
e5901c94 SG |
588 | vector |= bitmask; |
589 | bitmask <<= 1; | |
590 | } | |
962f5caf | 591 | |
e5901c94 SG |
592 | return vector; |
593 | } | |
594 | ||
17c43f1a | 595 | int dm_gpio_get_values_as_int(const struct gpio_desc *desc_list, int count) |
bbf24780 SG |
596 | { |
597 | unsigned bitmask = 1; | |
598 | unsigned vector = 0; | |
599 | int ret, i; | |
600 | ||
601 | for (i = 0; i < count; i++) { | |
602 | ret = dm_gpio_get_value(&desc_list[i]); | |
603 | if (ret < 0) | |
604 | return ret; | |
605 | else if (ret) | |
606 | vector |= bitmask; | |
607 | bitmask <<= 1; | |
608 | } | |
609 | ||
610 | return vector; | |
611 | } | |
612 | ||
3669e0e7 SG |
613 | static int _gpio_request_by_name_nodev(const void *blob, int node, |
614 | const char *list_name, int index, | |
615 | struct gpio_desc *desc, int flags, | |
616 | bool add_index) | |
617 | { | |
618 | struct fdtdec_phandle_args args; | |
619 | int ret; | |
620 | ||
621 | desc->dev = NULL; | |
622 | desc->offset = 0; | |
6c880b77 | 623 | desc->flags = 0; |
3669e0e7 SG |
624 | ret = fdtdec_parse_phandle_with_args(blob, node, list_name, |
625 | "#gpio-cells", 0, index, &args); | |
626 | if (ret) { | |
627 | debug("%s: fdtdec_parse_phandle_with_args failed\n", __func__); | |
628 | goto err; | |
629 | } | |
630 | ||
631 | ret = uclass_get_device_by_of_offset(UCLASS_GPIO, args.node, | |
632 | &desc->dev); | |
633 | if (ret) { | |
634 | debug("%s: uclass_get_device_by_of_offset failed\n", __func__); | |
635 | goto err; | |
636 | } | |
637 | ret = gpio_find_and_xlate(desc, &args); | |
638 | if (ret) { | |
639 | debug("%s: gpio_find_and_xlate failed\n", __func__); | |
640 | goto err; | |
641 | } | |
642 | ret = dm_gpio_requestf(desc, add_index ? "%s.%s%d" : "%s.%s", | |
643 | fdt_get_name(blob, node, NULL), | |
644 | list_name, index); | |
645 | if (ret) { | |
646 | debug("%s: dm_gpio_requestf failed\n", __func__); | |
647 | goto err; | |
648 | } | |
649 | ret = dm_gpio_set_dir_flags(desc, flags | desc->flags); | |
650 | if (ret) { | |
651 | debug("%s: dm_gpio_set_dir failed\n", __func__); | |
652 | goto err; | |
653 | } | |
654 | ||
655 | return 0; | |
656 | err: | |
657 | debug("%s: Node '%s', property '%s', failed to request GPIO index %d: %d\n", | |
658 | __func__, fdt_get_name(blob, node, NULL), list_name, index, ret); | |
659 | return ret; | |
660 | } | |
661 | ||
662 | int gpio_request_by_name_nodev(const void *blob, int node, | |
663 | const char *list_name, int index, | |
664 | struct gpio_desc *desc, int flags) | |
665 | { | |
666 | return _gpio_request_by_name_nodev(blob, node, list_name, index, desc, | |
667 | flags, index > 0); | |
668 | } | |
669 | ||
670 | int gpio_request_by_name(struct udevice *dev, const char *list_name, int index, | |
671 | struct gpio_desc *desc, int flags) | |
672 | { | |
673 | /* | |
674 | * This isn't ideal since we don't use dev->name in the debug() | |
675 | * calls in gpio_request_by_name(), but we can do this until | |
676 | * gpio_request_by_name_nodev() can be dropped. | |
677 | */ | |
678 | return gpio_request_by_name_nodev(gd->fdt_blob, dev->of_offset, | |
679 | list_name, index, desc, flags); | |
680 | } | |
681 | ||
682 | int gpio_request_list_by_name_nodev(const void *blob, int node, | |
683 | const char *list_name, | |
684 | struct gpio_desc *desc, int max_count, | |
685 | int flags) | |
686 | { | |
687 | int count; | |
688 | int ret; | |
689 | ||
2984e7a1 | 690 | for (count = 0; count < max_count; count++) { |
3669e0e7 SG |
691 | ret = _gpio_request_by_name_nodev(blob, node, list_name, count, |
692 | &desc[count], flags, true); | |
693 | if (ret == -ENOENT) | |
694 | break; | |
695 | else if (ret) | |
696 | goto err; | |
697 | } | |
698 | ||
699 | /* We ran out of GPIOs in the list */ | |
700 | return count; | |
701 | ||
702 | err: | |
703 | gpio_free_list_nodev(desc, count - 1); | |
704 | ||
705 | return ret; | |
706 | } | |
707 | ||
708 | int gpio_request_list_by_name(struct udevice *dev, const char *list_name, | |
709 | struct gpio_desc *desc, int max_count, | |
710 | int flags) | |
711 | { | |
712 | /* | |
713 | * This isn't ideal since we don't use dev->name in the debug() | |
714 | * calls in gpio_request_by_name(), but we can do this until | |
715 | * gpio_request_list_by_name_nodev() can be dropped. | |
716 | */ | |
717 | return gpio_request_list_by_name_nodev(gd->fdt_blob, dev->of_offset, | |
718 | list_name, desc, max_count, | |
719 | flags); | |
720 | } | |
721 | ||
722 | int gpio_get_list_count(struct udevice *dev, const char *list_name) | |
723 | { | |
724 | int ret; | |
725 | ||
726 | ret = fdtdec_parse_phandle_with_args(gd->fdt_blob, dev->of_offset, | |
727 | list_name, "#gpio-cells", 0, -1, | |
728 | NULL); | |
729 | if (ret) { | |
730 | debug("%s: Node '%s', property '%s', GPIO count failed: %d\n", | |
731 | __func__, dev->name, list_name, ret); | |
732 | } | |
733 | ||
734 | return ret; | |
735 | } | |
736 | ||
737 | int dm_gpio_free(struct udevice *dev, struct gpio_desc *desc) | |
738 | { | |
739 | /* For now, we don't do any checking of dev */ | |
740 | return _dm_gpio_free(desc->dev, desc->offset); | |
741 | } | |
742 | ||
743 | int gpio_free_list(struct udevice *dev, struct gpio_desc *desc, int count) | |
744 | { | |
745 | int i; | |
746 | ||
747 | /* For now, we don't do any checking of dev */ | |
748 | for (i = 0; i < count; i++) | |
749 | dm_gpio_free(dev, &desc[i]); | |
750 | ||
751 | return 0; | |
752 | } | |
753 | ||
754 | int gpio_free_list_nodev(struct gpio_desc *desc, int count) | |
755 | { | |
756 | return gpio_free_list(NULL, desc, count); | |
757 | } | |
758 | ||
96495d90 | 759 | /* We need to renumber the GPIOs when any driver is probed/removed */ |
b892d127 | 760 | static int gpio_renumber(struct udevice *removed_dev) |
96495d90 SG |
761 | { |
762 | struct gpio_dev_priv *uc_priv; | |
54c5d08a | 763 | struct udevice *dev; |
96495d90 SG |
764 | struct uclass *uc; |
765 | unsigned base; | |
766 | int ret; | |
767 | ||
768 | ret = uclass_get(UCLASS_GPIO, &uc); | |
769 | if (ret) | |
770 | return ret; | |
771 | ||
772 | /* Ensure that we have a base for each bank */ | |
773 | base = 0; | |
774 | uclass_foreach_dev(dev, uc) { | |
b892d127 | 775 | if (device_active(dev) && dev != removed_dev) { |
e564f054 | 776 | uc_priv = dev_get_uclass_priv(dev); |
96495d90 SG |
777 | uc_priv->gpio_base = base; |
778 | base += uc_priv->gpio_count; | |
779 | } | |
780 | } | |
781 | ||
782 | return 0; | |
783 | } | |
784 | ||
17c43f1a | 785 | int gpio_get_number(const struct gpio_desc *desc) |
56a71f89 SG |
786 | { |
787 | struct udevice *dev = desc->dev; | |
788 | struct gpio_dev_priv *uc_priv; | |
789 | ||
790 | if (!dev) | |
791 | return -1; | |
792 | uc_priv = dev->uclass_priv; | |
793 | ||
794 | return uc_priv->gpio_base + desc->offset; | |
795 | } | |
796 | ||
54c5d08a | 797 | static int gpio_post_probe(struct udevice *dev) |
96495d90 | 798 | { |
e564f054 | 799 | struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); |
b892d127 SG |
800 | |
801 | uc_priv->name = calloc(uc_priv->gpio_count, sizeof(char *)); | |
802 | if (!uc_priv->name) | |
803 | return -ENOMEM; | |
804 | ||
805 | return gpio_renumber(NULL); | |
96495d90 SG |
806 | } |
807 | ||
54c5d08a | 808 | static int gpio_pre_remove(struct udevice *dev) |
96495d90 | 809 | { |
e564f054 | 810 | struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev); |
b892d127 SG |
811 | int i; |
812 | ||
813 | for (i = 0; i < uc_priv->gpio_count; i++) { | |
814 | if (uc_priv->name[i]) | |
815 | free(uc_priv->name[i]); | |
816 | } | |
817 | free(uc_priv->name); | |
818 | ||
819 | return gpio_renumber(dev); | |
96495d90 SG |
820 | } |
821 | ||
822 | UCLASS_DRIVER(gpio) = { | |
823 | .id = UCLASS_GPIO, | |
824 | .name = "gpio", | |
ae89bb0d | 825 | .flags = DM_UC_FLAG_SEQ_ALIAS, |
96495d90 SG |
826 | .post_probe = gpio_post_probe, |
827 | .pre_remove = gpio_pre_remove, | |
828 | .per_device_auto_alloc_size = sizeof(struct gpio_dev_priv), | |
829 | }; |