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 /*
29  * Pre-requisites: headers required by header of this unit
30  */
31 #include "include/i2caux_interface.h"
32 #include "../engine.h"
33 #include "../i2c_engine.h"
34 #include "../i2c_sw_engine.h"
35 
36 /*
37  * Header of this unit
38  */
39 
40 #include "i2c_sw_engine_dce110.h"
41 
42 /*
43  * Post-requisites: headers required by this unit
44  */
45 
46 /*
47  * This unit
48  */
49 
50 /*
51  * @brief
52  * Cast 'struct i2c_sw_engine *'
53  * to 'struct i2c_sw_engine_dce110 *'
54  */
55 #define FROM_I2C_SW_ENGINE(ptr) \
56 	container_of((ptr), struct i2c_sw_engine_dce110, base)
57 /*
58  * @brief
59  * Cast 'struct i2c_engine *'
60  * to 'struct i2c_sw_engine_dce80 *'
61  */
62 #define FROM_I2C_ENGINE(ptr) \
63 	FROM_I2C_SW_ENGINE(container_of((ptr), struct i2c_sw_engine, base))
64 
65 /*
66  * @brief
67  * Cast 'struct engine *'
68  * to 'struct i2c_sw_engine_dce80 *'
69  */
70 #define FROM_ENGINE(ptr) \
71 	FROM_I2C_ENGINE(container_of((ptr), struct i2c_engine, base))
72 
73 static void release_engine(
74 	struct engine *engine)
75 {
76 }
77 
78 static void destruct(
79 	struct i2c_sw_engine_dce110 *engine)
80 {
81 	dal_i2c_sw_engine_destruct(&engine->base);
82 }
83 
84 static void destroy(
85 	struct i2c_engine **engine)
86 {
87 	struct i2c_sw_engine_dce110 *sw_engine = FROM_I2C_ENGINE(*engine);
88 
89 	destruct(sw_engine);
90 
91 	kfree(sw_engine);
92 
93 	*engine = NULL;
94 }
95 
96 static bool acquire_engine(
97 	struct i2c_engine *engine,
98 	struct ddc *ddc_handle)
99 {
100 	return dal_i2caux_i2c_sw_engine_acquire_engine(engine, ddc_handle);
101 }
102 
103 static const struct i2c_engine_funcs i2c_engine_funcs = {
104 	.acquire_engine = acquire_engine,
105 	.destroy = destroy,
106 	.get_speed = dal_i2c_sw_engine_get_speed,
107 	.set_speed = dal_i2c_sw_engine_set_speed,
108 	.setup_engine = dal_i2c_engine_setup_i2c_engine,
109 	.submit_channel_request = dal_i2c_sw_engine_submit_channel_request,
110 	.process_channel_reply = dal_i2c_engine_process_channel_reply,
111 	.get_channel_status = dal_i2c_sw_engine_get_channel_status,
112 };
113 
114 static const struct engine_funcs engine_funcs = {
115 	.release_engine = release_engine,
116 	.get_engine_type = dal_i2c_sw_engine_get_engine_type,
117 	.acquire = dal_i2c_engine_acquire,
118 	.submit_request = dal_i2c_sw_engine_submit_request,
119 };
120 
121 static void construct(
122 	struct i2c_sw_engine_dce110 *engine_dce110,
123 	const struct i2c_sw_engine_dce110_create_arg *arg_dce110)
124 {
125 	struct i2c_sw_engine_create_arg arg_base;
126 
127 	arg_base.ctx = arg_dce110->ctx;
128 	arg_base.default_speed = arg_dce110->default_speed;
129 
130 	dal_i2c_sw_engine_construct(&engine_dce110->base, &arg_base);
131 
132 	/*struct engine   struct engine_funcs*/
133 	engine_dce110->base.base.base.funcs = &engine_funcs;
134 	/*struct i2c_engine  struct i2c_engine_funcs*/
135 	engine_dce110->base.base.funcs = &i2c_engine_funcs;
136 	engine_dce110->base.default_speed = arg_dce110->default_speed;
137 	engine_dce110->engine_id = arg_dce110->engine_id;
138 }
139 
140 struct i2c_engine *dal_i2c_sw_engine_dce110_create(
141 	const struct i2c_sw_engine_dce110_create_arg *arg)
142 {
143 	struct i2c_sw_engine_dce110 *engine_dce110;
144 
145 	if (!arg) {
146 		ASSERT_CRITICAL(false);
147 		return NULL;
148 	}
149 
150 	engine_dce110 = kzalloc(sizeof(struct i2c_sw_engine_dce110),
151 				GFP_KERNEL);
152 
153 	if (!engine_dce110) {
154 		ASSERT_CRITICAL(false);
155 		return NULL;
156 	}
157 
158 	construct(engine_dce110, arg);
159 	return &engine_dce110->base.base;
160 }
161