2 * Copyright 2012-15 Advanced Micro Devices, Inc.
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
27 * Pre-requisites: headers required by header of this unit
30 #include <linux/slab.h>
32 #include "dm_services.h"
33 #include "include/gpio_interface.h"
34 #include "include/gpio_service_interface.h"
35 #include "hw_translate.h"
36 #include "hw_factory.h"
42 #include "gpio_service.h"
45 * Post-requisites: headers required by this unit
55 struct gpio_service *dal_gpio_service_create(
56 enum dce_version dce_version,
57 enum dce_environment dce_environment,
58 struct dc_context *ctx)
60 struct gpio_service *service;
63 service = kzalloc(sizeof(struct gpio_service), GFP_KERNEL);
70 if (!dal_hw_translate_init(&service->translate, dce_version,
76 if (!dal_hw_factory_init(&service->factory, dce_version,
82 /* allocate and initialize busyness storage */
88 uint32_t number_of_bits =
89 service->factory.number_of_pins[index_of_id];
93 service->busyness[index_of_id] =
94 kcalloc(number_of_bits, sizeof(char),
97 if (!service->busyness[index_of_id]) {
103 service->busyness[index_of_id][i] = 0;
105 } while (i < number_of_bits);
107 service->busyness[index_of_id] = NULL;
111 } while (index_of_id < GPIO_ID_COUNT);
117 while (index_of_id) {
119 kfree(service->busyness[index_of_id]);
128 struct gpio *dal_gpio_service_create_irq(
129 struct gpio_service *service,
136 if (!service->translate.funcs->offset_to_id(offset, mask, &id, &en)) {
137 ASSERT_CRITICAL(false);
141 return dal_gpio_create_irq(service, id, en);
144 struct gpio *dal_gpio_service_create_generic_mux(
145 struct gpio_service *service,
151 struct gpio *generic;
153 if (!service->translate.funcs->offset_to_id(offset, mask, &id, &en)) {
154 ASSERT_CRITICAL(false);
158 generic = dal_gpio_create(
159 service, id, en, GPIO_PIN_OUTPUT_STATE_DEFAULT);
164 void dal_gpio_destroy_generic_mux(
168 ASSERT_CRITICAL(false);
172 dal_gpio_destroy(mux);
178 struct gpio_pin_info dal_gpio_get_generic_pin_info(
179 struct gpio_service *service,
183 struct gpio_pin_info pin;
185 if (service->translate.funcs->id_to_offset) {
186 service->translate.funcs->id_to_offset(id, en, &pin);
188 pin.mask = 0xFFFFFFFF;
189 pin.offset = 0xFFFFFFFF;
195 void dal_gpio_service_destroy(
196 struct gpio_service **ptr)
203 /* free business storage */
205 uint32_t index_of_id = 0;
208 kfree((*ptr)->busyness[index_of_id]);
211 } while (index_of_id < GPIO_ID_COUNT);
219 enum gpio_result dal_mux_setup_config(
221 struct gpio_generic_mux_config *config)
223 struct gpio_config_data config_data;
226 return GPIO_RESULT_INVALID_DATA;
228 config_data.config.generic_mux = *config;
229 config_data.type = GPIO_CONFIG_TYPE_GENERIC_MUX;
231 return dal_gpio_set_config(mux, &config_data);
239 static bool is_pin_busy(
240 const struct gpio_service *service,
244 return service->busyness[id][en];
247 static void set_pin_busy(
248 struct gpio_service *service,
252 service->busyness[id][en] = true;
255 static void set_pin_free(
256 struct gpio_service *service,
260 service->busyness[id][en] = false;
263 enum gpio_result dal_gpio_service_lock(
264 struct gpio_service *service,
268 if (!service->busyness[id]) {
269 ASSERT_CRITICAL(false);
270 return GPIO_RESULT_OPEN_FAILED;
273 set_pin_busy(service, id, en);
274 return GPIO_RESULT_OK;
277 enum gpio_result dal_gpio_service_unlock(
278 struct gpio_service *service,
282 if (!service->busyness[id]) {
283 ASSERT_CRITICAL(false);
284 return GPIO_RESULT_OPEN_FAILED;
287 set_pin_free(service, id, en);
288 return GPIO_RESULT_OK;
291 enum gpio_result dal_gpio_service_open(
294 struct gpio_service *service = gpio->service;
295 enum gpio_id id = gpio->id;
296 uint32_t en = gpio->en;
297 enum gpio_mode mode = gpio->mode;
299 struct hw_gpio_pin **pin = &gpio->pin;
302 if (!service->busyness[id]) {
303 ASSERT_CRITICAL(false);
304 return GPIO_RESULT_OPEN_FAILED;
307 if (is_pin_busy(service, id, en)) {
308 ASSERT_CRITICAL(false);
309 return GPIO_RESULT_DEVICE_BUSY;
313 case GPIO_ID_DDC_DATA:
314 *pin = service->factory.funcs->get_ddc_pin(gpio);
315 service->factory.funcs->define_ddc_registers(*pin, en);
317 case GPIO_ID_DDC_CLOCK:
318 *pin = service->factory.funcs->get_ddc_pin(gpio);
319 service->factory.funcs->define_ddc_registers(*pin, en);
321 case GPIO_ID_GENERIC:
322 *pin = service->factory.funcs->get_generic_pin(gpio);
323 service->factory.funcs->define_generic_registers(*pin, en);
326 *pin = service->factory.funcs->get_hpd_pin(gpio);
327 service->factory.funcs->define_hpd_registers(*pin, en);
330 //TODO: gsl and sync support? create_sync and create_gsl are NULL
335 ASSERT_CRITICAL(false);
336 return GPIO_RESULT_NON_SPECIFIC_ERROR;
340 ASSERT_CRITICAL(false);
341 return GPIO_RESULT_NON_SPECIFIC_ERROR;
344 if (!(*pin)->funcs->open(*pin, mode)) {
345 ASSERT_CRITICAL(false);
346 dal_gpio_service_close(service, pin);
347 return GPIO_RESULT_OPEN_FAILED;
350 set_pin_busy(service, id, en);
351 return GPIO_RESULT_OK;
354 void dal_gpio_service_close(
355 struct gpio_service *service,
356 struct hw_gpio_pin **ptr)
358 struct hw_gpio_pin *pin;
361 ASSERT_CRITICAL(false);
368 set_pin_free(service, pin->id, pin->en);
370 pin->funcs->close(pin);
376 enum dc_irq_source dal_irq_get_source(
377 const struct gpio *irq)
379 enum gpio_id id = dal_gpio_get_id(irq);
383 return (enum dc_irq_source)(DC_IRQ_SOURCE_HPD1 +
384 dal_gpio_get_enum(irq));
385 case GPIO_ID_GPIO_PAD:
386 return (enum dc_irq_source)(DC_IRQ_SOURCE_GPIOPAD0 +
387 dal_gpio_get_enum(irq));
389 return DC_IRQ_SOURCE_INVALID;
393 enum dc_irq_source dal_irq_get_rx_source(
394 const struct gpio *irq)
396 enum gpio_id id = dal_gpio_get_id(irq);
400 return (enum dc_irq_source)(DC_IRQ_SOURCE_HPD1RX +
401 dal_gpio_get_enum(irq));
403 return DC_IRQ_SOURCE_INVALID;
407 enum gpio_result dal_irq_setup_hpd_filter(
409 struct gpio_hpd_config *config)
411 struct gpio_config_data config_data;
414 return GPIO_RESULT_INVALID_DATA;
416 config_data.type = GPIO_CONFIG_TYPE_HPD;
417 config_data.config.hpd = *config;
419 return dal_gpio_set_config(irq, &config_data);
424 * Creation and destruction
427 struct gpio *dal_gpio_create_irq(
428 struct gpio_service *service,
436 case GPIO_ID_GPIO_PAD:
440 ASSERT_CRITICAL(false);
444 irq = dal_gpio_create(
445 service, id, en, GPIO_PIN_OUTPUT_STATE_DEFAULT);
450 ASSERT_CRITICAL(false);
454 void dal_gpio_destroy_irq(
458 ASSERT_CRITICAL(false);
462 dal_gpio_destroy(irq);
468 struct ddc *dal_gpio_create_ddc(
469 struct gpio_service *service,
472 struct gpio_ddc_hw_info *info)
478 if (!service->translate.funcs->offset_to_id(offset, mask, &id, &en))
481 ddc = kzalloc(sizeof(struct ddc), GFP_KERNEL);
488 ddc->pin_data = dal_gpio_create(
489 service, GPIO_ID_DDC_DATA, en, GPIO_PIN_OUTPUT_STATE_DEFAULT);
491 if (!ddc->pin_data) {
496 ddc->pin_clock = dal_gpio_create(
497 service, GPIO_ID_DDC_CLOCK, en, GPIO_PIN_OUTPUT_STATE_DEFAULT);
499 if (!ddc->pin_clock) {
504 ddc->hw_info = *info;
506 ddc->ctx = service->ctx;
511 dal_gpio_destroy(&ddc->pin_data);
519 void dal_gpio_destroy_ddc(
528 dal_gpio_destroy(&(*ddc)->pin_data);
529 dal_gpio_destroy(&(*ddc)->pin_clock);
535 enum gpio_result dal_ddc_open(
538 enum gpio_ddc_config_type config_type)
540 enum gpio_result result;
542 struct gpio_config_data config_data;
543 struct hw_gpio *hw_data;
544 struct hw_gpio *hw_clock;
546 result = dal_gpio_open_ex(ddc->pin_data, mode);
548 if (result != GPIO_RESULT_OK) {
553 result = dal_gpio_open_ex(ddc->pin_clock, mode);
555 if (result != GPIO_RESULT_OK) {
560 /* DDC clock and data pins should belong
561 * to the same DDC block id,
562 * we use the data pin to set the pad mode. */
564 if (mode == GPIO_MODE_INPUT)
565 /* this is from detect_sink_type,
566 * we need extra delay there */
567 config_data.type = GPIO_CONFIG_TYPE_I2C_AUX_DUAL_MODE;
569 config_data.type = GPIO_CONFIG_TYPE_DDC;
571 config_data.config.ddc.type = config_type;
573 hw_data = FROM_HW_GPIO_PIN(ddc->pin_data->pin);
574 hw_clock = FROM_HW_GPIO_PIN(ddc->pin_clock->pin);
576 config_data.config.ddc.data_en_bit_present = hw_data->store.en != 0;
577 config_data.config.ddc.clock_en_bit_present = hw_clock->store.en != 0;
579 result = dal_gpio_set_config(ddc->pin_data, &config_data);
581 if (result == GPIO_RESULT_OK)
586 dal_gpio_close(ddc->pin_clock);
589 dal_gpio_close(ddc->pin_data);
594 enum gpio_result dal_ddc_change_mode(
598 enum gpio_result result;
600 enum gpio_mode original_mode =
601 dal_gpio_get_mode(ddc->pin_data);
603 result = dal_gpio_change_mode(ddc->pin_data, mode);
605 /* [anaumov] DAL2 code returns GPIO_RESULT_NON_SPECIFIC_ERROR
606 * in case of failures;
607 * set_mode() is so that, in case of failure,
608 * we must explicitly set original mode */
610 if (result != GPIO_RESULT_OK)
613 result = dal_gpio_change_mode(ddc->pin_clock, mode);
615 if (result == GPIO_RESULT_OK)
618 dal_gpio_change_mode(ddc->pin_clock, original_mode);
621 dal_gpio_change_mode(ddc->pin_data, original_mode);
626 enum gpio_ddc_line dal_ddc_get_line(
627 const struct ddc *ddc)
629 return (enum gpio_ddc_line)dal_gpio_get_enum(ddc->pin_data);
632 enum gpio_result dal_ddc_set_config(
634 enum gpio_ddc_config_type config_type)
636 struct gpio_config_data config_data;
638 config_data.type = GPIO_CONFIG_TYPE_DDC;
640 config_data.config.ddc.type = config_type;
641 config_data.config.ddc.data_en_bit_present = false;
642 config_data.config.ddc.clock_en_bit_present = false;
644 return dal_gpio_set_config(ddc->pin_data, &config_data);
651 dal_gpio_close(ddc->pin_clock);
652 dal_gpio_close(ddc->pin_data);