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