cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
Log | Files | Refs | README | LICENSE | sfeed.txt

hw_generic.c (3332B)

      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_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_MIN) || (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}