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 "dm_services.h" 27 28 #include "include/gpio_types.h" 29 #include "hw_gpio.h" 30 #include "hw_hpd.h" 31 32 #include "reg_helper.h" 33 #include "hpd_regs.h" 34 35 #undef FN 36 #define FN(reg_name, field_name) \ 37 hpd->shifts->field_name, hpd->masks->field_name 38 39 #define CTX \ 40 hpd->base.base.ctx 41 #define REG(reg)\ 42 (hpd->regs->reg) 43 44 static bool dal_hw_hpd_construct( 45 struct hw_hpd *pin, 46 enum gpio_id id, 47 uint32_t en, 48 struct dc_context *ctx) 49 { 50 if (!dal_hw_gpio_construct(&pin->base, id, en, ctx)) 51 return false; 52 return true; 53 } 54 55 static void dal_hw_hpd_destruct( 56 struct hw_hpd *pin) 57 { 58 dal_hw_gpio_destruct(&pin->base); 59 } 60 61 62 static void destruct( 63 struct hw_hpd *hpd) 64 { 65 dal_hw_hpd_destruct(hpd); 66 } 67 68 static void destroy( 69 struct hw_gpio_pin **ptr) 70 { 71 struct hw_hpd *hpd = HW_HPD_FROM_BASE(*ptr); 72 73 destruct(hpd); 74 75 dm_free(hpd); 76 77 *ptr = NULL; 78 } 79 80 static enum gpio_result get_value( 81 const struct hw_gpio_pin *ptr, 82 uint32_t *value) 83 { 84 struct hw_hpd *hpd = HW_HPD_FROM_BASE(ptr); 85 uint32_t hpd_delayed = 0; 86 87 /* in Interrupt mode we ask for SENSE bit */ 88 89 if (ptr->mode == GPIO_MODE_INTERRUPT) { 90 91 REG_GET(int_status, 92 DC_HPD_SENSE_DELAYED, &hpd_delayed); 93 94 *value = hpd_delayed; 95 return GPIO_RESULT_OK; 96 } 97 98 /* in any other modes, operate as normal GPIO */ 99 100 return dal_hw_gpio_get_value(ptr, value); 101 } 102 103 static enum gpio_result set_config( 104 struct hw_gpio_pin *ptr, 105 const struct gpio_config_data *config_data) 106 { 107 struct hw_hpd *hpd = HW_HPD_FROM_BASE(ptr); 108 109 if (!config_data) 110 return GPIO_RESULT_INVALID_DATA; 111 112 REG_UPDATE_2(toggle_filt_cntl, 113 DC_HPD_CONNECT_INT_DELAY, config_data->config.hpd.delay_on_connect / 10, 114 DC_HPD_DISCONNECT_INT_DELAY, config_data->config.hpd.delay_on_disconnect / 10); 115 116 return GPIO_RESULT_OK; 117 } 118 119 static const struct hw_gpio_pin_funcs funcs = { 120 .destroy = destroy, 121 .open = dal_hw_gpio_open, 122 .get_value = get_value, 123 .set_value = dal_hw_gpio_set_value, 124 .set_config = set_config, 125 .change_mode = dal_hw_gpio_change_mode, 126 .close = dal_hw_gpio_close, 127 }; 128 129 static bool construct( 130 struct hw_hpd *hpd, 131 enum gpio_id id, 132 uint32_t en, 133 struct dc_context *ctx) 134 { 135 if (id != GPIO_ID_HPD) { 136 ASSERT_CRITICAL(false); 137 return false; 138 } 139 140 if ((en < GPIO_HPD_MIN) || (en > GPIO_HPD_MAX)) { 141 ASSERT_CRITICAL(false); 142 return false; 143 } 144 145 if (!dal_hw_hpd_construct(hpd, id, en, ctx)) { 146 ASSERT_CRITICAL(false); 147 return false; 148 } 149 150 hpd->base.base.funcs = &funcs; 151 152 return true; 153 } 154 155 struct hw_gpio_pin *dal_hw_hpd_create( 156 struct dc_context *ctx, 157 enum gpio_id id, 158 uint32_t en) 159 { 160 struct hw_hpd *hpd = dm_alloc(sizeof(struct hw_hpd)); 161 162 if (!hpd) { 163 ASSERT_CRITICAL(false); 164 return NULL; 165 } 166 167 if (construct(hpd, id, en, ctx)) 168 return &hpd->base.base; 169 170 ASSERT_CRITICAL(false); 171 172 dm_free(hpd); 173 174 return NULL; 175 } 176