150 lines
3.6 KiB
C
150 lines
3.6 KiB
C
/*
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* Copyright 2012-15 Advanced Micro Devices, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* Authors: AMD
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*
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*/
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#include "dm_services.h"
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#include "include/gpio_interface.h"
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#include "include/gpio_types.h"
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#include "hw_gpio.h"
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#include "hw_hpd.h"
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#include "reg_helper.h"
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#include "hpd_regs.h"
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#undef FN
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#define FN(reg_name, field_name) \
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hpd->shifts->field_name, hpd->masks->field_name
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#define CTX \
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hpd->base.base.ctx
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#define REG(reg)\
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(hpd->regs->reg)
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struct gpio;
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static void dal_hw_hpd_destruct(
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struct hw_hpd *pin)
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{
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dal_hw_gpio_destruct(&pin->base);
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}
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static void dal_hw_hpd_destroy(
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struct hw_gpio_pin **ptr)
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{
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struct hw_hpd *hpd = HW_HPD_FROM_BASE(*ptr);
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dal_hw_hpd_destruct(hpd);
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kfree(hpd);
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*ptr = NULL;
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}
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static enum gpio_result get_value(
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const struct hw_gpio_pin *ptr,
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uint32_t *value)
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{
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struct hw_hpd *hpd = HW_HPD_FROM_BASE(ptr);
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uint32_t hpd_delayed = 0;
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/* in Interrupt mode we ask for SENSE bit */
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if (ptr->mode == GPIO_MODE_INTERRUPT) {
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REG_GET(int_status,
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DC_HPD_SENSE_DELAYED, &hpd_delayed);
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*value = hpd_delayed;
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return GPIO_RESULT_OK;
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}
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/* in any other modes, operate as normal GPIO */
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return dal_hw_gpio_get_value(ptr, value);
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}
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static enum gpio_result set_config(
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struct hw_gpio_pin *ptr,
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const struct gpio_config_data *config_data)
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{
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struct hw_hpd *hpd = HW_HPD_FROM_BASE(ptr);
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if (!config_data)
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return GPIO_RESULT_INVALID_DATA;
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REG_UPDATE_2(toggle_filt_cntl,
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DC_HPD_CONNECT_INT_DELAY, config_data->config.hpd.delay_on_connect / 10,
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DC_HPD_DISCONNECT_INT_DELAY, config_data->config.hpd.delay_on_disconnect / 10);
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return GPIO_RESULT_OK;
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}
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static const struct hw_gpio_pin_funcs funcs = {
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.destroy = dal_hw_hpd_destroy,
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.open = dal_hw_gpio_open,
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.get_value = get_value,
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.set_value = dal_hw_gpio_set_value,
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.set_config = set_config,
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.change_mode = dal_hw_gpio_change_mode,
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.close = dal_hw_gpio_close,
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};
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static void dal_hw_hpd_construct(
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struct hw_hpd *pin,
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enum gpio_id id,
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uint32_t en,
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struct dc_context *ctx)
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{
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dal_hw_gpio_construct(&pin->base, id, en, ctx);
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pin->base.base.funcs = &funcs;
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}
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void dal_hw_hpd_init(
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struct hw_hpd **hw_hpd,
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struct dc_context *ctx,
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enum gpio_id id,
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uint32_t en)
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{
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if ((en < GPIO_DDC_LINE_MIN) || (en > GPIO_DDC_LINE_MAX)) {
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ASSERT_CRITICAL(false);
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*hw_hpd = NULL;
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}
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*hw_hpd = kzalloc(sizeof(struct hw_hpd), GFP_KERNEL);
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if (!*hw_hpd) {
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ASSERT_CRITICAL(false);
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return;
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}
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dal_hw_hpd_construct(*hw_hpd, id, en, ctx);
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}
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struct hw_gpio_pin *dal_hw_hpd_get_pin(struct gpio *gpio)
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{
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struct hw_hpd *hw_hpd = dal_gpio_get_hpd(gpio);
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return &hw_hpd->base.base;
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}
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