1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (c) 2015 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
5 */
6
7 #include <common.h>
8 #include <dm.h>
9 #include <errno.h>
10 #include <sysreset.h>
11 #include <asm/state.h>
12 #include <asm/test.h>
13
sandbox_warm_sysreset_request(struct udevice * dev,enum sysreset_t type)14 static int sandbox_warm_sysreset_request(struct udevice *dev,
15 enum sysreset_t type)
16 {
17 struct sandbox_state *state = state_get_current();
18
19 switch (type) {
20 case SYSRESET_WARM:
21 state->last_sysreset = type;
22 break;
23 default:
24 return -ENOSYS;
25 }
26 if (!state->sysreset_allowed[type])
27 return -EACCES;
28
29 return -EINPROGRESS;
30 }
31
sandbox_warm_sysreset_get_status(struct udevice * dev,char * buf,int size)32 int sandbox_warm_sysreset_get_status(struct udevice *dev, char *buf, int size)
33 {
34 strlcpy(buf, "Reset Status: WARM", size);
35
36 return 0;
37 }
38
sandbox_warm_sysreset_get_last(struct udevice * dev)39 int sandbox_warm_sysreset_get_last(struct udevice *dev)
40 {
41 return SYSRESET_WARM;
42 }
43
sandbox_sysreset_request(struct udevice * dev,enum sysreset_t type)44 static int sandbox_sysreset_request(struct udevice *dev, enum sysreset_t type)
45 {
46 struct sandbox_state *state = state_get_current();
47
48 /*
49 * If we have a device tree, the device we created from platform data
50 * (see the U_BOOT_DRVINFO() declaration below) should not do anything.
51 * If we are that device, return an error.
52 */
53 if (state->fdt_fname && !dev_has_ofnode(dev))
54 return -ENODEV;
55
56 switch (type) {
57 case SYSRESET_COLD:
58 state->last_sysreset = type;
59 if (!state->sysreset_allowed[type])
60 return -EACCES;
61 sandbox_reset();
62 break;
63 case SYSRESET_POWER_OFF:
64 state->last_sysreset = type;
65 if (!state->sysreset_allowed[type])
66 return -EACCES;
67 sandbox_exit();
68 break;
69 case SYSRESET_POWER:
70 if (!state->sysreset_allowed[type])
71 return -EACCES;
72 sandbox_exit();
73 default:
74 return -ENOSYS;
75 }
76 if (!state->sysreset_allowed[type])
77 return -EACCES;
78
79 return -EINPROGRESS;
80 }
81
sandbox_sysreset_get_status(struct udevice * dev,char * buf,int size)82 int sandbox_sysreset_get_status(struct udevice *dev, char *buf, int size)
83 {
84 strlcpy(buf, "Reset Status: COLD", size);
85
86 return 0;
87 }
88
sandbox_sysreset_get_last(struct udevice * dev)89 int sandbox_sysreset_get_last(struct udevice *dev)
90 {
91 struct sandbox_state *state = state_get_current();
92
93 /*
94 * The first phase is a power reset, after that we assume we don't
95 * know.
96 */
97 return state->jumped_fname ? SYSRESET_WARM : SYSRESET_POWER;
98 }
99
100 static struct sysreset_ops sandbox_sysreset_ops = {
101 .request = sandbox_sysreset_request,
102 .get_status = sandbox_sysreset_get_status,
103 .get_last = sandbox_sysreset_get_last,
104 };
105
106 static const struct udevice_id sandbox_sysreset_ids[] = {
107 { .compatible = "sandbox,reset" },
108 { }
109 };
110
111 U_BOOT_DRIVER(sysreset_sandbox) = {
112 .name = "sysreset_sandbox",
113 .id = UCLASS_SYSRESET,
114 .of_match = sandbox_sysreset_ids,
115 .ops = &sandbox_sysreset_ops,
116 };
117
118 static struct sysreset_ops sandbox_warm_sysreset_ops = {
119 .request = sandbox_warm_sysreset_request,
120 .get_status = sandbox_warm_sysreset_get_status,
121 .get_last = sandbox_warm_sysreset_get_last,
122 };
123
124 static const struct udevice_id sandbox_warm_sysreset_ids[] = {
125 { .compatible = "sandbox,warm-reset" },
126 { }
127 };
128
129 U_BOOT_DRIVER(warm_sysreset_sandbox) = {
130 .name = "warm_sysreset_sandbox",
131 .id = UCLASS_SYSRESET,
132 .of_match = sandbox_warm_sysreset_ids,
133 .ops = &sandbox_warm_sysreset_ops,
134 };
135
136 #if CONFIG_IS_ENABLED(OF_REAL)
137 /* This is here in case we don't have a device tree */
138 U_BOOT_DRVINFO(sysreset_sandbox_non_fdt) = {
139 .name = "sysreset_sandbox",
140 };
141 #endif
142