1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Verified Boot for Embedded (VBE) access functions
4 *
5 * Copyright 2022 Google LLC
6 * Written by Simon Glass <sjg@chromium.org>
7 */
8
9 #include <bootmeth.h>
10 #include <bootstd.h>
11 #include <dm.h>
12 #include <image.h>
13 #include <vbe.h>
14 #include <dm/uclass-internal.h>
15
16 /**
17 * is_vbe() - Check if a device is a VBE method
18 *
19 * @dev: Device to check
20 * @return true if this is a VBE bootmth device, else false
21 */
is_vbe(struct udevice * dev)22 static bool is_vbe(struct udevice *dev)
23 {
24 return !strncmp("vbe", dev->driver->name, 3);
25 }
26
vbe_find_next_device(struct udevice ** devp)27 int vbe_find_next_device(struct udevice **devp)
28 {
29 for (uclass_find_next_device(devp);
30 *devp;
31 uclass_find_next_device(devp)) {
32 if (is_vbe(*devp))
33 return 0;
34 }
35
36 return 0;
37 }
38
vbe_find_first_device(struct udevice ** devp)39 int vbe_find_first_device(struct udevice **devp)
40 {
41 uclass_find_first_device(UCLASS_BOOTMETH, devp);
42 if (!*devp || is_vbe(*devp))
43 return 0;
44
45 return vbe_find_next_device(devp);
46 }
47
vbe_list(void)48 int vbe_list(void)
49 {
50 struct bootstd_priv *std;
51 struct udevice *dev;
52 int ret;
53
54 ret = bootstd_get_priv(&std);
55 if (ret)
56 return ret;
57
58 printf("%3s %-3s %-15s %-15s %s\n", "#", "Sel", "Device", "Driver",
59 "Description");
60 printf("%3s %-3s %-15s %-15s %s\n", "---", "---", "--------------",
61 "--------------", "-----------");
62 for (ret = vbe_find_first_device(&dev); dev;
63 ret = vbe_find_next_device(&dev)) {
64 const struct bootmeth_uc_plat *plat = dev_get_uclass_plat(dev);
65
66 printf("%3d %-3s %-15s %-15s %s\n", dev_seq(dev),
67 std->vbe_bootmeth == dev ? "*" : "", dev->name,
68 dev->driver->name, plat->desc);
69 }
70 printf("%3s %-3s %-15s %-15s %s\n", "---", "---", "--------------",
71 "--------------", "-----------");
72
73 return 0;
74 }
75
vbe_select(struct udevice * dev)76 int vbe_select(struct udevice *dev)
77 {
78 struct bootstd_priv *std;
79 int ret;
80
81 ret = bootstd_get_priv(&std);
82 if (ret)
83 return ret;
84 std->vbe_bootmeth = dev;
85
86 return 0;
87 }
88
vbe_find_by_any(const char * name,struct udevice ** devp)89 int vbe_find_by_any(const char *name, struct udevice **devp)
90 {
91 struct udevice *dev;
92 int ret, seq;
93 char *endp;
94
95 seq = simple_strtol(name, &endp, 16);
96
97 /* Select by name */
98 if (*endp) {
99 ret = uclass_get_device_by_name(UCLASS_BOOTMETH, name, &dev);
100 if (ret) {
101 printf("Cannot probe VBE bootmeth '%s' (err=%d)\n", name,
102 ret);
103 return ret;
104 }
105
106 /* select by number */
107 } else {
108 ret = uclass_get_device_by_seq(UCLASS_BOOTMETH, seq, &dev);
109 if (ret) {
110 printf("Cannot find '%s' (err=%d)\n", name, ret);
111 return ret;
112 }
113 }
114
115 *devp = dev;
116
117 return 0;
118 }
119