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_DEVICE() declaration below) should not do anything.
51 * If we are that device, return an error.
52 */
53 if (state->fdt_fname && !dev_of_valid(dev))
54 return -ENODEV;
55
56 switch (type) {
57 case SYSRESET_COLD:
58 state->last_sysreset = type;
59 break;
60 case SYSRESET_POWER:
61 state->last_sysreset = type;
62 if (!state->sysreset_allowed[type])
63 return -EACCES;
64 sandbox_exit();
65 break;
66 case SYSRESET_POWER_OFF:
67 if (!state->sysreset_allowed[type])
68 return -EACCES;
69 default:
70 return -ENOSYS;
71 }
72 if (!state->sysreset_allowed[type])
73 return -EACCES;
74
75 return -EINPROGRESS;
76 }
77
sandbox_sysreset_get_status(struct udevice * dev,char * buf,int size)78 int sandbox_sysreset_get_status(struct udevice *dev, char *buf, int size)
79 {
80 strlcpy(buf, "Reset Status: COLD", size);
81
82 return 0;
83 }
84
sandbox_sysreset_get_last(struct udevice * dev)85 int sandbox_sysreset_get_last(struct udevice *dev)
86 {
87 struct sandbox_state *state = state_get_current();
88
89 /*
90 * The first phase is a power reset, after that we assume we don't
91 * know.
92 */
93 return state->jumped_fname ? SYSRESET_WARM : SYSRESET_POWER;
94 }
95
96 static struct sysreset_ops sandbox_sysreset_ops = {
97 .request = sandbox_sysreset_request,
98 .get_status = sandbox_sysreset_get_status,
99 .get_last = sandbox_sysreset_get_last,
100 };
101
102 static const struct udevice_id sandbox_sysreset_ids[] = {
103 { .compatible = "sandbox,reset" },
104 { }
105 };
106
107 U_BOOT_DRIVER(sysreset_sandbox) = {
108 .name = "sysreset_sandbox",
109 .id = UCLASS_SYSRESET,
110 .of_match = sandbox_sysreset_ids,
111 .ops = &sandbox_sysreset_ops,
112 };
113
114 static struct sysreset_ops sandbox_warm_sysreset_ops = {
115 .request = sandbox_warm_sysreset_request,
116 .get_status = sandbox_warm_sysreset_get_status,
117 .get_last = sandbox_warm_sysreset_get_last,
118 };
119
120 static const struct udevice_id sandbox_warm_sysreset_ids[] = {
121 { .compatible = "sandbox,warm-reset" },
122 { }
123 };
124
125 U_BOOT_DRIVER(warm_sysreset_sandbox) = {
126 .name = "warm_sysreset_sandbox",
127 .id = UCLASS_SYSRESET,
128 .of_match = sandbox_warm_sysreset_ids,
129 .ops = &sandbox_warm_sysreset_ops,
130 };
131
132 /* This is here in case we don't have a device tree */
133 U_BOOT_DEVICE(sysreset_sandbox_non_fdt) = {
134 .name = "sysreset_sandbox",
135 };
136