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_generic.h" |
34 | |
35 | #include "reg_helper.h" |
36 | #include "generic_regs.h" |
37 | |
38 | #undef FN |
39 | #define FN(reg_name, field_name) \ |
40 | generic->shifts->field_name, generic->masks->field_name |
41 | |
42 | #define CTX \ |
43 | generic->base.base.ctx |
44 | #define REG(reg)\ |
45 | (generic->regs->reg) |
46 | |
47 | struct gpio; |
48 | |
49 | static void dal_hw_generic_destruct( |
50 | struct hw_generic *pin) |
51 | { |
52 | dal_hw_gpio_destruct(pin: &pin->base); |
53 | } |
54 | |
55 | static void dal_hw_generic_destroy( |
56 | struct hw_gpio_pin **ptr) |
57 | { |
58 | struct hw_generic *generic = HW_GENERIC_FROM_BASE(*ptr); |
59 | |
60 | dal_hw_generic_destruct(pin: generic); |
61 | |
62 | kfree(objp: generic); |
63 | |
64 | *ptr = NULL; |
65 | } |
66 | |
67 | static enum gpio_result set_config( |
68 | struct hw_gpio_pin *ptr, |
69 | const struct gpio_config_data *config_data) |
70 | { |
71 | struct hw_generic *generic = HW_GENERIC_FROM_BASE(ptr); |
72 | |
73 | if (!config_data) |
74 | return GPIO_RESULT_INVALID_DATA; |
75 | |
76 | REG_UPDATE_2(mux, |
77 | GENERIC_EN, config_data->config.generic_mux.enable_output_from_mux, |
78 | GENERIC_SEL, config_data->config.generic_mux.mux_select); |
79 | |
80 | return GPIO_RESULT_OK; |
81 | } |
82 | |
83 | static const struct hw_gpio_pin_funcs funcs = { |
84 | .destroy = dal_hw_generic_destroy, |
85 | .open = dal_hw_gpio_open, |
86 | .get_value = dal_hw_gpio_get_value, |
87 | .set_value = dal_hw_gpio_set_value, |
88 | .set_config = set_config, |
89 | .change_mode = dal_hw_gpio_change_mode, |
90 | .close = dal_hw_gpio_close, |
91 | }; |
92 | |
93 | static void dal_hw_generic_construct( |
94 | struct hw_generic *pin, |
95 | enum gpio_id id, |
96 | uint32_t en, |
97 | struct dc_context *ctx) |
98 | { |
99 | dal_hw_gpio_construct(pin: &pin->base, id, en, ctx); |
100 | pin->base.base.funcs = &funcs; |
101 | } |
102 | |
103 | void dal_hw_generic_init( |
104 | struct hw_generic **hw_generic, |
105 | struct dc_context *ctx, |
106 | enum gpio_id id, |
107 | uint32_t en) |
108 | { |
109 | if ((en < GPIO_DDC_LINE_MIN) || (en > GPIO_DDC_LINE_MAX)) { |
110 | ASSERT_CRITICAL(false); |
111 | *hw_generic = NULL; |
112 | } |
113 | |
114 | *hw_generic = kzalloc(size: sizeof(struct hw_generic), GFP_KERNEL); |
115 | if (!*hw_generic) { |
116 | ASSERT_CRITICAL(false); |
117 | return; |
118 | } |
119 | |
120 | dal_hw_generic_construct(pin: *hw_generic, id, en, ctx); |
121 | } |
122 | |
123 | |
124 | struct hw_gpio_pin *dal_hw_generic_get_pin(struct gpio *gpio) |
125 | { |
126 | struct hw_generic *hw_generic = dal_gpio_get_generic(gpio); |
127 | |
128 | return &hw_generic->base.base; |
129 | } |
130 | |