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// SPDX-License-Identifier: GPL-2.0
/*
* Verified Boot for Embedded (VBE) access functions
*
* Copyright 2022 Google LLC
* Written by Simon Glass <sjg@chromium.org>
*/
#include <common.h>
#include <bootmeth.h>
#include <bootstd.h>
#include <dm.h>
#include <image.h>
#include <vbe.h>
#include <dm/uclass-internal.h>
/**
* is_vbe() - Check if a device is a VBE method
*
* @dev: Device to check
* @return true if this is a VBE bootmth device, else false
*/
static bool is_vbe(struct udevice *dev)
{
return !strncmp("vbe", dev->driver->name, 3);
}
int vbe_find_next_device(struct udevice **devp)
{
for (uclass_find_next_device(devp);
*devp;
uclass_find_next_device(devp)) {
if (is_vbe(*devp))
return 0;
}
return 0;
}
int vbe_find_first_device(struct udevice **devp)
{
uclass_find_first_device(UCLASS_BOOTMETH, devp);
if (!*devp || is_vbe(*devp))
return 0;
return vbe_find_next_device(devp);
}
int vbe_list(void)
{
struct bootstd_priv *std;
struct udevice *dev;
int ret;
ret = bootstd_get_priv(&std);
if (ret)
return ret;
printf("%3s %-3s %-15s %-15s %s\n", "#", "Sel", "Device", "Driver",
"Description");
printf("%3s %-3s %-15s %-15s %s\n", "---", "---", "--------------",
"--------------", "-----------");
for (ret = vbe_find_first_device(&dev); dev;
ret = vbe_find_next_device(&dev)) {
const struct bootmeth_uc_plat *plat = dev_get_uclass_plat(dev);
printf("%3d %-3s %-15s %-15s %s\n", dev_seq(dev),
std->vbe_bootmeth == dev ? "*" : "", dev->name,
dev->driver->name, plat->desc);
}
printf("%3s %-3s %-15s %-15s %s\n", "---", "---", "--------------",
"--------------", "-----------");
return 0;
}
int vbe_select(struct udevice *dev)
{
struct bootstd_priv *std;
int ret;
ret = bootstd_get_priv(&std);
if (ret)
return ret;
std->vbe_bootmeth = dev;
return 0;
}
int vbe_find_by_any(const char *name, struct udevice **devp)
{
struct udevice *dev;
int ret, seq;
char *endp;
seq = simple_strtol(name, &endp, 16);
/* Select by name */
if (*endp) {
ret = uclass_get_device_by_name(UCLASS_BOOTMETH, name, &dev);
if (ret) {
printf("Cannot probe VBE bootmeth '%s' (err=%d)\n", name,
ret);
return ret;
}
/* select by number */
} else {
ret = uclass_get_device_by_seq(UCLASS_BOOTMETH, seq, &dev);
if (ret) {
printf("Cannot find '%s' (err=%d)\n", name, ret);
return ret;
}
}
*devp = dev;
return 0;
}
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