diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/gpio/gpio_base.c')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/gpio/gpio_base.c | 272 |
1 files changed, 272 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/gpio/gpio_base.c b/drivers/gpu/drm/amd/display/dc/gpio/gpio_base.c new file mode 100644 index 000000000000..1d1efd72b291 --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/gpio/gpio_base.c @@ -0,0 +1,272 @@ +/* + * Copyright 2012-15 Advanced Micro Devices, Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: AMD + * + */ + +/* + * Pre-requisites: headers required by header of this unit + */ + +#include "dm_services.h" + +#include "include/gpio_interface.h" +#include "include/gpio_service_interface.h" +#include "hw_gpio.h" +#include "hw_translate.h" +#include "hw_factory.h" +#include "gpio_service.h" + +/* + * Post-requisites: headers required by this unit + */ + +/* + * This unit + */ + +/* + * @brief + * Public API + */ + +enum gpio_result dal_gpio_open( + struct gpio *gpio, + enum gpio_mode mode) +{ + return dal_gpio_open_ex(gpio, mode); +} + +enum gpio_result dal_gpio_open_ex( + struct gpio *gpio, + enum gpio_mode mode) +{ + if (gpio->pin) { + ASSERT_CRITICAL(false); + return GPIO_RESULT_ALREADY_OPENED; + } + + gpio->mode = mode; + + return dal_gpio_service_open( + gpio->service, gpio->id, gpio->en, mode, &gpio->pin); +} + +enum gpio_result dal_gpio_get_value( + const struct gpio *gpio, + uint32_t *value) +{ + if (!gpio->pin) { + BREAK_TO_DEBUGGER(); + return GPIO_RESULT_NULL_HANDLE; + } + + return gpio->pin->funcs->get_value(gpio->pin, value); +} + +enum gpio_result dal_gpio_set_value( + const struct gpio *gpio, + uint32_t value) +{ + if (!gpio->pin) { + BREAK_TO_DEBUGGER(); + return GPIO_RESULT_NULL_HANDLE; + } + + return gpio->pin->funcs->set_value(gpio->pin, value); +} + +enum gpio_mode dal_gpio_get_mode( + const struct gpio *gpio) +{ + return gpio->mode; +} + +enum gpio_result dal_gpio_change_mode( + struct gpio *gpio, + enum gpio_mode mode) +{ + if (!gpio->pin) { + BREAK_TO_DEBUGGER(); + return GPIO_RESULT_NULL_HANDLE; + } + + return gpio->pin->funcs->change_mode(gpio->pin, mode); +} + +enum gpio_id dal_gpio_get_id( + const struct gpio *gpio) +{ + return gpio->id; +} + +uint32_t dal_gpio_get_enum( + const struct gpio *gpio) +{ + return gpio->en; +} + +enum gpio_result dal_gpio_set_config( + struct gpio *gpio, + const struct gpio_config_data *config_data) +{ + if (!gpio->pin) { + BREAK_TO_DEBUGGER(); + return GPIO_RESULT_NULL_HANDLE; + } + + return gpio->pin->funcs->set_config(gpio->pin, config_data); +} + +enum gpio_result dal_gpio_get_pin_info( + const struct gpio *gpio, + struct gpio_pin_info *pin_info) +{ + return gpio->service->translate.funcs->id_to_offset( + gpio->id, gpio->en, pin_info) ? + GPIO_RESULT_OK : GPIO_RESULT_INVALID_DATA; +} + +enum sync_source dal_gpio_get_sync_source( + const struct gpio *gpio) +{ + switch (gpio->id) { + case GPIO_ID_GENERIC: + switch (gpio->en) { + case GPIO_GENERIC_A: + return SYNC_SOURCE_IO_GENERIC_A; + case GPIO_GENERIC_B: + return SYNC_SOURCE_IO_GENERIC_B; + case GPIO_GENERIC_C: + return SYNC_SOURCE_IO_GENERIC_C; + case GPIO_GENERIC_D: + return SYNC_SOURCE_IO_GENERIC_D; + case GPIO_GENERIC_E: + return SYNC_SOURCE_IO_GENERIC_E; + case GPIO_GENERIC_F: + return SYNC_SOURCE_IO_GENERIC_F; + default: + return SYNC_SOURCE_NONE; + } + break; + case GPIO_ID_SYNC: + switch (gpio->en) { + case GPIO_SYNC_HSYNC_A: + return SYNC_SOURCE_IO_HSYNC_A; + case GPIO_SYNC_VSYNC_A: + return SYNC_SOURCE_IO_VSYNC_A; + case GPIO_SYNC_HSYNC_B: + return SYNC_SOURCE_IO_HSYNC_B; + case GPIO_SYNC_VSYNC_B: + return SYNC_SOURCE_IO_VSYNC_B; + default: + return SYNC_SOURCE_NONE; + } + break; + case GPIO_ID_HPD: + switch (gpio->en) { + case GPIO_HPD_1: + return SYNC_SOURCE_IO_HPD1; + case GPIO_HPD_2: + return SYNC_SOURCE_IO_HPD2; + default: + return SYNC_SOURCE_NONE; + } + break; + case GPIO_ID_GSL: + switch (gpio->en) { + case GPIO_GSL_GENLOCK_CLOCK: + return SYNC_SOURCE_GSL_IO_GENLOCK_CLOCK; + case GPIO_GSL_GENLOCK_VSYNC: + return SYNC_SOURCE_GSL_IO_GENLOCK_VSYNC; + case GPIO_GSL_SWAPLOCK_A: + return SYNC_SOURCE_GSL_IO_SWAPLOCK_A; + case GPIO_GSL_SWAPLOCK_B: + return SYNC_SOURCE_GSL_IO_SWAPLOCK_B; + default: + return SYNC_SOURCE_NONE; + } + break; + default: + return SYNC_SOURCE_NONE; + } +} + +enum gpio_pin_output_state dal_gpio_get_output_state( + const struct gpio *gpio) +{ + return gpio->output_state; +} + +void dal_gpio_close( + struct gpio *gpio) +{ + if (!gpio) + return; + + dal_gpio_service_close(gpio->service, &gpio->pin); + + gpio->mode = GPIO_MODE_UNKNOWN; +} + +/* + * @brief + * Creation and destruction + */ + +struct gpio *dal_gpio_create( + struct gpio_service *service, + enum gpio_id id, + uint32_t en, + enum gpio_pin_output_state output_state) +{ + struct gpio *gpio = kzalloc(sizeof(struct gpio), GFP_KERNEL); + + if (!gpio) { + ASSERT_CRITICAL(false); + return NULL; + } + + gpio->service = service; + gpio->pin = NULL; + gpio->id = id; + gpio->en = en; + gpio->mode = GPIO_MODE_UNKNOWN; + gpio->output_state = output_state; + + return gpio; +} + +void dal_gpio_destroy( + struct gpio **gpio) +{ + if (!gpio || !*gpio) { + ASSERT_CRITICAL(false); + return; + } + + dal_gpio_close(*gpio); + + kfree(*gpio); + + *gpio = NULL; +} |