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
dal_hw_hpd_construct(struct hw_hpd * pin,enum gpio_id id,uint32_t en,struct dc_context * ctx)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
dal_hw_hpd_destruct(struct hw_hpd * pin)53 static void dal_hw_hpd_destruct(
54 struct hw_hpd *pin)
55 {
56 dal_hw_gpio_destruct(&pin->base);
57 }
58
59
destruct(struct hw_hpd * hpd)60 static void destruct(
61 struct hw_hpd *hpd)
62 {
63 dal_hw_hpd_destruct(hpd);
64 }
65
destroy(struct hw_gpio_pin ** ptr)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
get_value(const struct hw_gpio_pin * ptr,uint32_t * value)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
set_config(struct hw_gpio_pin * ptr,const struct gpio_config_data * config_data)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
construct(struct hw_hpd * hpd,enum gpio_id id,uint32_t en,struct dc_context * ctx)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
dal_hw_hpd_create(struct dc_context * ctx,enum gpio_id id,uint32_t en)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