1 /* $NetBSD: amdgpu_hw_generic.c,v 1.2 2021/12/18 23:45:04 riastradh Exp $ */
2
3 /*
4 * Copyright 2012-15 Advanced Micro Devices, Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 *
24 * Authors: AMD
25 *
26 */
27
28 #include <sys/cdefs.h>
29 __KERNEL_RCSID(0, "$NetBSD: amdgpu_hw_generic.c,v 1.2 2021/12/18 23:45:04 riastradh Exp $");
30
31 #include <linux/slab.h>
32
33 #include "dm_services.h"
34
35 #include "include/gpio_interface.h"
36 #include "include/gpio_types.h"
37 #include "hw_gpio.h"
38 #include "hw_generic.h"
39
40 #include "reg_helper.h"
41 #include "generic_regs.h"
42
43 #undef FN
44 #define FN(reg_name, field_name) \
45 generic->shifts->field_name, generic->masks->field_name
46
47 #define CTX \
48 generic->base.base.ctx
49 #define REG(reg)\
50 (generic->regs->reg)
51
52 struct gpio;
53
dal_hw_generic_destruct(struct hw_generic * pin)54 static void dal_hw_generic_destruct(
55 struct hw_generic *pin)
56 {
57 dal_hw_gpio_destruct(&pin->base);
58 }
59
dal_hw_generic_destroy(struct hw_gpio_pin ** ptr)60 static void dal_hw_generic_destroy(
61 struct hw_gpio_pin **ptr)
62 {
63 struct hw_generic *generic = HW_GENERIC_FROM_BASE(*ptr);
64
65 dal_hw_generic_destruct(generic);
66
67 kfree(generic);
68
69 *ptr = NULL;
70 }
71
set_config(struct hw_gpio_pin * ptr,const struct gpio_config_data * config_data)72 static enum gpio_result set_config(
73 struct hw_gpio_pin *ptr,
74 const struct gpio_config_data *config_data)
75 {
76 struct hw_generic *generic = HW_GENERIC_FROM_BASE(ptr);
77
78 if (!config_data)
79 return GPIO_RESULT_INVALID_DATA;
80
81 REG_UPDATE_2(mux,
82 GENERIC_EN, config_data->config.generic_mux.enable_output_from_mux,
83 GENERIC_SEL, config_data->config.generic_mux.mux_select);
84
85 return GPIO_RESULT_OK;
86 }
87
88 static const struct hw_gpio_pin_funcs funcs = {
89 .destroy = dal_hw_generic_destroy,
90 .open = dal_hw_gpio_open,
91 .get_value = dal_hw_gpio_get_value,
92 .set_value = dal_hw_gpio_set_value,
93 .set_config = set_config,
94 .change_mode = dal_hw_gpio_change_mode,
95 .close = dal_hw_gpio_close,
96 };
97
dal_hw_generic_construct(struct hw_generic * pin,enum gpio_id id,uint32_t en,struct dc_context * ctx)98 static void dal_hw_generic_construct(
99 struct hw_generic *pin,
100 enum gpio_id id,
101 uint32_t en,
102 struct dc_context *ctx)
103 {
104 dal_hw_gpio_construct(&pin->base, id, en, ctx);
105 pin->base.base.funcs = &funcs;
106 }
107
dal_hw_generic_init(struct hw_generic ** hw_generic,struct dc_context * ctx,enum gpio_id id,uint32_t en)108 void dal_hw_generic_init(
109 struct hw_generic **hw_generic,
110 struct dc_context *ctx,
111 enum gpio_id id,
112 uint32_t en)
113 {
114 if ((en < GPIO_DDC_LINE_MIN) || (en > GPIO_DDC_LINE_MAX)) {
115 ASSERT_CRITICAL(false);
116 *hw_generic = NULL;
117 }
118
119 *hw_generic = kzalloc(sizeof(struct hw_generic), GFP_KERNEL);
120 if (!*hw_generic) {
121 ASSERT_CRITICAL(false);
122 return;
123 }
124
125 dal_hw_generic_construct(*hw_generic, id, en, ctx);
126 }
127
128
dal_hw_generic_get_pin(struct gpio * gpio)129 struct hw_gpio_pin *dal_hw_generic_get_pin(struct gpio *gpio)
130 {
131 struct hw_generic *hw_generic = dal_gpio_get_generic(gpio);
132
133 return &hw_generic->base.base;
134 }
135