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 void 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 dal_hw_gpio_construct(&pin->base, id, en, ctx); 51 } 52 53 static void dal_hw_hpd_destruct( 54 struct hw_hpd *pin) 55 { 56 dal_hw_gpio_destruct(&pin->base); 57 } 58 59 60 static void destruct( 61 struct hw_hpd *hpd) 62 { 63 dal_hw_hpd_destruct(hpd); 64 } 65 66 static void destroy( 67 struct hw_gpio_pin **ptr) 68 { 69 struct hw_hpd *hpd = HW_HPD_FROM_BASE(*ptr); 70 71 destruct(hpd); 72 73 kfree(hpd); 74 75 *ptr = NULL; 76 } 77 78 static enum gpio_result get_value( 79 const struct hw_gpio_pin *ptr, 80 uint32_t *value) 81 { 82 struct hw_hpd *hpd = HW_HPD_FROM_BASE(ptr); 83 uint32_t hpd_delayed = 0; 84 85 /* in Interrupt mode we ask for SENSE bit */ 86 87 if (ptr->mode == GPIO_MODE_INTERRUPT) { 88 89 REG_GET(int_status, 90 DC_HPD_SENSE_DELAYED, &hpd_delayed); 91 92 *value = hpd_delayed; 93 return GPIO_RESULT_OK; 94 } 95 96 /* in any other modes, operate as normal GPIO */ 97 98 return dal_hw_gpio_get_value(ptr, value); 99 } 100 101 static enum gpio_result set_config( 102 struct hw_gpio_pin *ptr, 103 const struct gpio_config_data *config_data) 104 { 105 struct hw_hpd *hpd = HW_HPD_FROM_BASE(ptr); 106 107 if (!config_data) 108 return GPIO_RESULT_INVALID_DATA; 109 110 REG_UPDATE_2(toggle_filt_cntl, 111 DC_HPD_CONNECT_INT_DELAY, config_data->config.hpd.delay_on_connect / 10, 112 DC_HPD_DISCONNECT_INT_DELAY, config_data->config.hpd.delay_on_disconnect / 10); 113 114 return GPIO_RESULT_OK; 115 } 116 117 static const struct hw_gpio_pin_funcs funcs = { 118 .destroy = destroy, 119 .open = dal_hw_gpio_open, 120 .get_value = get_value, 121 .set_value = dal_hw_gpio_set_value, 122 .set_config = set_config, 123 .change_mode = dal_hw_gpio_change_mode, 124 .close = dal_hw_gpio_close, 125 }; 126 127 static void construct( 128 struct hw_hpd *hpd, 129 enum gpio_id id, 130 uint32_t en, 131 struct dc_context *ctx) 132 { 133 dal_hw_hpd_construct(hpd, id, en, ctx); 134 hpd->base.base.funcs = &funcs; 135 } 136 137 struct hw_gpio_pin *dal_hw_hpd_create( 138 struct dc_context *ctx, 139 enum gpio_id id, 140 uint32_t en) 141 { 142 struct hw_hpd *hpd; 143 144 if (id != GPIO_ID_HPD) { 145 ASSERT_CRITICAL(false); 146 return NULL; 147 } 148 149 if ((en < GPIO_HPD_MIN) || (en > GPIO_HPD_MAX)) { 150 ASSERT_CRITICAL(false); 151 return NULL; 152 } 153 154 hpd = kzalloc(sizeof(struct hw_hpd), GFP_KERNEL); 155 if (!hpd) { 156 ASSERT_CRITICAL(false); 157 return NULL; 158 } 159 160 construct(hpd, id, en, ctx); 161 return &hpd->base.base; 162 } 163