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1/*2 * Copyright 2012-15 Advanced Micro Devices, Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * 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 OR20 * OTHER DEALINGS IN THE SOFTWARE.21 *22 * Authors: AMD23 *24 */25 26#include <linux/slab.h>27 28#include "dm_services.h"29 30#include "include/gpio_interface.h"31#include "include/gpio_types.h"32#include "hw_gpio.h"33#include "hw_generic.h"34 35#include "reg_helper.h"36#include "generic_regs.h"37 38#undef FN39#define FN(reg_name, field_name) \40 generic->shifts->field_name, generic->masks->field_name41 42#define CTX \43 generic->base.base.ctx44#define REG(reg)\45 (generic->regs->reg)46 47struct gpio;48 49static void dal_hw_generic_destruct(50 struct hw_generic *pin)51{52 dal_hw_gpio_destruct(&pin->base);53}54 55static void dal_hw_generic_destroy(56 struct hw_gpio_pin **ptr)57{58 struct hw_generic *generic = HW_GENERIC_FROM_BASE(*ptr);59 60 dal_hw_generic_destruct(generic);61 62 kfree(generic);63 64 *ptr = NULL;65}66 67static enum gpio_result set_config(68 struct hw_gpio_pin *ptr,69 const struct gpio_config_data *config_data)70{71 struct hw_generic *generic = HW_GENERIC_FROM_BASE(ptr);72 73 if (!config_data)74 return GPIO_RESULT_INVALID_DATA;75 76 REG_UPDATE_2(mux,77 GENERIC_EN, config_data->config.generic_mux.enable_output_from_mux,78 GENERIC_SEL, config_data->config.generic_mux.mux_select);79 80 return GPIO_RESULT_OK;81}82 83static const struct hw_gpio_pin_funcs funcs = {84 .destroy = dal_hw_generic_destroy,85 .open = dal_hw_gpio_open,86 .get_value = dal_hw_gpio_get_value,87 .set_value = dal_hw_gpio_set_value,88 .set_config = set_config,89 .change_mode = dal_hw_gpio_change_mode,90 .close = dal_hw_gpio_close,91};92 93static void dal_hw_generic_construct(94 struct hw_generic *pin,95 enum gpio_id id,96 uint32_t en,97 struct dc_context *ctx)98{99 dal_hw_gpio_construct(&pin->base, id, en, ctx);100 pin->base.base.funcs = &funcs;101}102 103void dal_hw_generic_init(104 struct hw_generic **hw_generic,105 struct dc_context *ctx,106 enum gpio_id id,107 uint32_t en)108{109 if (en > GPIO_DDC_LINE_MAX) {110 ASSERT_CRITICAL(false);111 *hw_generic = NULL;112 }113 114 *hw_generic = kzalloc(sizeof(struct hw_generic), GFP_KERNEL);115 if (!*hw_generic) {116 ASSERT_CRITICAL(false);117 return;118 }119 120 dal_hw_generic_construct(*hw_generic, id, en, ctx);121}122 123 124struct hw_gpio_pin *dal_hw_generic_get_pin(struct gpio *gpio)125{126 struct hw_generic *hw_generic = dal_gpio_get_generic(gpio);127 128 return &hw_generic->base.base;129}130