diff options
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc/gpio/hw_generic.c')
-rw-r--r-- | drivers/gpu/drm/amd/display/dc/gpio/hw_generic.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/gpio/hw_generic.c b/drivers/gpu/drm/amd/display/dc/gpio/hw_generic.c new file mode 100644 index 0000000000..f9e847e655 --- /dev/null +++ b/drivers/gpu/drm/amd/display/dc/gpio/hw_generic.c @@ -0,0 +1,129 @@ +/* + * 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 + * + */ + +#include <linux/slab.h> + +#include "dm_services.h" + +#include "include/gpio_interface.h" +#include "include/gpio_types.h" +#include "hw_gpio.h" +#include "hw_generic.h" + +#include "reg_helper.h" +#include "generic_regs.h" + +#undef FN +#define FN(reg_name, field_name) \ + generic->shifts->field_name, generic->masks->field_name + +#define CTX \ + generic->base.base.ctx +#define REG(reg)\ + (generic->regs->reg) + +struct gpio; + +static void dal_hw_generic_destruct( + struct hw_generic *pin) +{ + dal_hw_gpio_destruct(&pin->base); +} + +static void dal_hw_generic_destroy( + struct hw_gpio_pin **ptr) +{ + struct hw_generic *generic = HW_GENERIC_FROM_BASE(*ptr); + + dal_hw_generic_destruct(generic); + + kfree(generic); + + *ptr = NULL; +} + +static enum gpio_result set_config( + struct hw_gpio_pin *ptr, + const struct gpio_config_data *config_data) +{ + struct hw_generic *generic = HW_GENERIC_FROM_BASE(ptr); + + if (!config_data) + return GPIO_RESULT_INVALID_DATA; + + REG_UPDATE_2(mux, + GENERIC_EN, config_data->config.generic_mux.enable_output_from_mux, + GENERIC_SEL, config_data->config.generic_mux.mux_select); + + return GPIO_RESULT_OK; +} + +static const struct hw_gpio_pin_funcs funcs = { + .destroy = dal_hw_generic_destroy, + .open = dal_hw_gpio_open, + .get_value = dal_hw_gpio_get_value, + .set_value = dal_hw_gpio_set_value, + .set_config = set_config, + .change_mode = dal_hw_gpio_change_mode, + .close = dal_hw_gpio_close, +}; + +static void dal_hw_generic_construct( + struct hw_generic *pin, + enum gpio_id id, + uint32_t en, + struct dc_context *ctx) +{ + dal_hw_gpio_construct(&pin->base, id, en, ctx); + pin->base.base.funcs = &funcs; +} + +void dal_hw_generic_init( + struct hw_generic **hw_generic, + struct dc_context *ctx, + enum gpio_id id, + uint32_t en) +{ + if ((en < GPIO_DDC_LINE_MIN) || (en > GPIO_DDC_LINE_MAX)) { + ASSERT_CRITICAL(false); + *hw_generic = NULL; + } + + *hw_generic = kzalloc(sizeof(struct hw_generic), GFP_KERNEL); + if (!*hw_generic) { + ASSERT_CRITICAL(false); + return; + } + + dal_hw_generic_construct(*hw_generic, id, en, ctx); +} + + +struct hw_gpio_pin *dal_hw_generic_get_pin(struct gpio *gpio) +{ + struct hw_generic *hw_generic = dal_gpio_get_generic(gpio); + + return &hw_generic->base.base; +} |