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