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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 "dm_services.h"27 28#include "include/gpio_interface.h"29#include "include/gpio_types.h"30#include "hw_gpio.h"31#include "hw_hpd.h"32 33#include "reg_helper.h"34#include "hpd_regs.h"35 36#undef FN37#define FN(reg_name, field_name) \38 hpd->shifts->field_name, hpd->masks->field_name39 40#define CTX \41 hpd->base.base.ctx42#define REG(reg)\43 (hpd->regs->reg)44 45struct gpio;46 47static void dal_hw_hpd_destruct(48 struct hw_hpd *pin)49{50 dal_hw_gpio_destruct(&pin->base);51}52 53static void dal_hw_hpd_destroy(54 struct hw_gpio_pin **ptr)55{56 struct hw_hpd *hpd = HW_HPD_FROM_BASE(*ptr);57 58 dal_hw_hpd_destruct(hpd);59 60 kfree(hpd);61 62 *ptr = NULL;63}64 65static enum gpio_result get_value(66 const struct hw_gpio_pin *ptr,67 uint32_t *value)68{69 struct hw_hpd *hpd = HW_HPD_FROM_BASE(ptr);70 uint32_t hpd_delayed = 0;71 72 /* in Interrupt mode we ask for SENSE bit */73 74 if (ptr->mode == GPIO_MODE_INTERRUPT) {75 76 REG_GET(int_status,77 DC_HPD_SENSE_DELAYED, &hpd_delayed);78 79 *value = hpd_delayed;80 return GPIO_RESULT_OK;81 }82 83 /* in any other modes, operate as normal GPIO */84 85 return dal_hw_gpio_get_value(ptr, value);86}87 88static enum gpio_result set_config(89 struct hw_gpio_pin *ptr,90 const struct gpio_config_data *config_data)91{92 struct hw_hpd *hpd = HW_HPD_FROM_BASE(ptr);93 94 if (!config_data)95 return GPIO_RESULT_INVALID_DATA;96 97 REG_UPDATE_2(toggle_filt_cntl,98 DC_HPD_CONNECT_INT_DELAY, config_data->config.hpd.delay_on_connect / 10,99 DC_HPD_DISCONNECT_INT_DELAY, config_data->config.hpd.delay_on_disconnect / 10);100 101 return GPIO_RESULT_OK;102}103 104static const struct hw_gpio_pin_funcs funcs = {105 .destroy = dal_hw_hpd_destroy,106 .open = dal_hw_gpio_open,107 .get_value = get_value,108 .set_value = dal_hw_gpio_set_value,109 .set_config = set_config,110 .change_mode = dal_hw_gpio_change_mode,111 .close = dal_hw_gpio_close,112};113 114static void dal_hw_hpd_construct(115 struct hw_hpd *pin,116 enum gpio_id id,117 uint32_t en,118 struct dc_context *ctx)119{120 dal_hw_gpio_construct(&pin->base, id, en, ctx);121 pin->base.base.funcs = &funcs;122}123 124void dal_hw_hpd_init(125 struct hw_hpd **hw_hpd,126 struct dc_context *ctx,127 enum gpio_id id,128 uint32_t en)129{130 if (en > GPIO_DDC_LINE_MAX) {131 ASSERT_CRITICAL(false);132 *hw_hpd = NULL;133 }134 135 *hw_hpd = kzalloc(sizeof(struct hw_hpd), GFP_KERNEL);136 if (!*hw_hpd) {137 ASSERT_CRITICAL(false);138 return;139 }140 141 dal_hw_hpd_construct(*hw_hpd, id, en, ctx);142}143 144struct hw_gpio_pin *dal_hw_hpd_get_pin(struct gpio *gpio)145{146 struct hw_hpd *hw_hpd = dal_gpio_get_hpd(gpio);147 148 return &hw_hpd->base.base;149}150