2 * Copyright 2012-15 Advanced Micro Devices, Inc.
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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.
26 #include <linux/slab.h>
28 #include "dm_services.h"
30 #include "include/gpio_interface.h"
31 #include "include/gpio_types.h"
35 #include "reg_helper.h"
39 #define FN(reg_name, field_name) \
40 hpd->shifts->field_name, hpd->masks->field_name
49 static void dal_hw_hpd_construct(
53 struct dc_context *ctx)
55 dal_hw_gpio_construct(&pin->base, id, en, ctx);
58 static void dal_hw_hpd_destruct(
61 dal_hw_gpio_destruct(&pin->base);
68 dal_hw_hpd_destruct(hpd);
72 struct hw_gpio_pin **ptr)
74 struct hw_hpd *hpd = HW_HPD_FROM_BASE(*ptr);
83 static enum gpio_result get_value(
84 const struct hw_gpio_pin *ptr,
87 struct hw_hpd *hpd = HW_HPD_FROM_BASE(ptr);
88 uint32_t hpd_delayed = 0;
90 /* in Interrupt mode we ask for SENSE bit */
92 if (ptr->mode == GPIO_MODE_INTERRUPT) {
95 DC_HPD_SENSE_DELAYED, &hpd_delayed);
98 return GPIO_RESULT_OK;
101 /* in any other modes, operate as normal GPIO */
103 return dal_hw_gpio_get_value(ptr, value);
106 static enum gpio_result set_config(
107 struct hw_gpio_pin *ptr,
108 const struct gpio_config_data *config_data)
110 struct hw_hpd *hpd = HW_HPD_FROM_BASE(ptr);
113 return GPIO_RESULT_INVALID_DATA;
115 REG_UPDATE_2(toggle_filt_cntl,
116 DC_HPD_CONNECT_INT_DELAY, config_data->config.hpd.delay_on_connect / 10,
117 DC_HPD_DISCONNECT_INT_DELAY, config_data->config.hpd.delay_on_disconnect / 10);
119 return GPIO_RESULT_OK;
122 static const struct hw_gpio_pin_funcs funcs = {
124 .open = dal_hw_gpio_open,
125 .get_value = get_value,
126 .set_value = dal_hw_gpio_set_value,
127 .set_config = set_config,
128 .change_mode = dal_hw_gpio_change_mode,
129 .close = dal_hw_gpio_close,
132 static void construct(
136 struct dc_context *ctx)
138 dal_hw_hpd_construct(hpd, id, en, ctx);
139 hpd->base.base.funcs = &funcs;
142 void dal_hw_hpd_init(
143 struct hw_hpd **hw_hpd,
144 struct dc_context *ctx,
148 if ((en < GPIO_DDC_LINE_MIN) || (en > GPIO_DDC_LINE_MAX)) {
149 ASSERT_CRITICAL(false);
153 *hw_hpd = kzalloc(sizeof(struct hw_hpd), GFP_KERNEL);
155 ASSERT_CRITICAL(false);
159 construct(*hw_hpd, id, en, ctx);
162 struct hw_gpio_pin *dal_hw_hpd_get_pin(struct gpio *gpio)
164 struct hw_hpd *hw_hpd = dal_gpio_get_hpd(gpio);
166 return &hw_hpd->base.base;