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