1/*
  2 * Copyright 2012-15 Advanced Micro Devices, Inc.
  3 *
  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:
 10 *
 11 * The above copyright notice and this permission notice shall be included in
 12 * all copies or substantial portions of the Software.
 13 *
 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.
 21 *
 22 * Authors: AMD
 23 *
 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 FN
 39#define FN(reg_name, field_name) \
 40	generic->shifts->field_name, generic->masks->field_name
 41
 42#define CTX \
 43	generic->base.base.ctx
 44#define REG(reg)\
 45	(generic->regs->reg)
 46
 47struct gpio;
 48
 49static void dal_hw_generic_construct(
 50	struct hw_generic *pin,
 51	enum gpio_id id,
 52	uint32_t en,
 53	struct dc_context *ctx)
 54{
 55	dal_hw_gpio_construct(&pin->base, id, en, ctx);
 56}
 57
 58static void dal_hw_generic_destruct(
 59	struct hw_generic *pin)
 60{
 61	dal_hw_gpio_destruct(&pin->base);
 62}
 63
 64static void destroy(
 65	struct hw_gpio_pin **ptr)
 66{
 67	struct hw_generic *generic = HW_GENERIC_FROM_BASE(*ptr);
 68
 69	dal_hw_generic_destruct(generic);
 70
 71	kfree(generic);
 72
 73	*ptr = NULL;
 74}
 75
 76static enum gpio_result set_config(
 77	struct hw_gpio_pin *ptr,
 78	const struct gpio_config_data *config_data)
 79{
 80	struct hw_generic *generic = HW_GENERIC_FROM_BASE(ptr);
 81
 82	if (!config_data)
 83		return GPIO_RESULT_INVALID_DATA;
 84
 85	REG_UPDATE_2(mux,
 86		GENERIC_EN, config_data->config.generic_mux.enable_output_from_mux,
 87		GENERIC_SEL, config_data->config.generic_mux.mux_select);
 88
 89	return GPIO_RESULT_OK;
 90}
 91
 92static const struct hw_gpio_pin_funcs funcs = {
 93	.destroy = destroy,
 94	.open = dal_hw_gpio_open,
 95	.get_value = dal_hw_gpio_get_value,
 96	.set_value = dal_hw_gpio_set_value,
 97	.set_config = set_config,
 98	.change_mode = dal_hw_gpio_change_mode,
 99	.close = dal_hw_gpio_close,
100};
101
102static void construct(
103	struct hw_generic *generic,
104	enum gpio_id id,
105	uint32_t en,
106	struct dc_context *ctx)
107{
108	dal_hw_generic_construct(generic, id, en, ctx);
109	generic->base.base.funcs = &funcs;
110}
111
112void dal_hw_generic_init(
113	struct hw_generic **hw_generic,
114	struct dc_context *ctx,
115	enum gpio_id id,
116	uint32_t en)
117{
118	if ((en < GPIO_DDC_LINE_MIN) || (en > GPIO_DDC_LINE_MAX)) {
119		ASSERT_CRITICAL(false);
120		*hw_generic = NULL;
121	}
122
123	*hw_generic = kzalloc(sizeof(struct hw_generic), GFP_KERNEL);
124	if (!*hw_generic) {
125		ASSERT_CRITICAL(false);
126		return;
127	}
128
129	construct(*hw_generic, id, en, ctx);
130}
131
132
133struct hw_gpio_pin *dal_hw_generic_get_pin(struct gpio *gpio)
134{
135	struct hw_generic *hw_generic = dal_gpio_get_generic(gpio);
136
137	return &hw_generic->base.base;
138}