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// SPDX-License-Identifier: GPL-2.0+
/*
* Uclass for sandbox host interface, used to access files on the host which
* contain partitions and filesystem
*
* Copyright 2022 Google LLC
* Written by Simon Glass <sjg@chromium.org>
*/
#define LOG_CATEGORY UCLASS_HOST
#include <common.h>
#include <blk.h>
#include <dm.h>
#include <malloc.h>
#include <sandbox_host.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <dm/uclass-internal.h>
DECLARE_GLOBAL_DATA_PTR;
/**
* struct host_priv - information kept by the host uclass
*
* @cur_dev: Currently selected host device, or NULL if none
*/
struct host_priv {
struct udevice *cur_dev;
};
int host_create_device(const char *label, bool removable, struct udevice **devp)
{
char dev_name[30], *str, *label_new;
struct host_sb_plat *plat;
struct udevice *dev, *blk;
int ret;
/* unbind any existing device with this label */
dev = host_find_by_label(label);
if (dev) {
ret = host_detach_file(dev);
if (ret)
return log_msg_ret("det", ret);
ret = device_unbind(dev);
if (ret)
return log_msg_ret("unb", ret);
}
snprintf(dev_name, sizeof(dev_name), "host-%s", label);
str = strdup(dev_name);
if (!str)
return -ENOMEM;
label_new = strdup(label);
if (!label_new) {
ret = -ENOMEM;
goto no_label;
}
ret = device_bind_driver(gd->dm_root, "host_sb_drv", str, &dev);
if (ret)
goto no_dev;
device_set_name_alloced(dev);
if (!blk_find_from_parent(dev, &blk)) {
struct blk_desc *desc = dev_get_uclass_plat(blk);
desc->removable = removable;
}
plat = dev_get_plat(dev);
plat->label = label_new;
*devp = dev;
return 0;
no_dev:
free(label_new);
no_label:
free(str);
return ret;
}
int host_attach_file(struct udevice *dev, const char *filename)
{
struct host_ops *ops = host_get_ops(dev);
if (!ops->attach_file)
return -ENOSYS;
return ops->attach_file(dev, filename);
}
int host_create_attach_file(const char *label, const char *filename,
bool removable, struct udevice **devp)
{
struct udevice *dev;
int ret;
ret = host_create_device(label, removable, &dev);
if (ret)
return log_msg_ret("cre", ret);
ret = host_attach_file(dev, filename);
if (ret) {
device_unbind(dev);
return log_msg_ret("att", ret);
}
*devp = dev;
return 0;
}
int host_detach_file(struct udevice *dev)
{
struct host_ops *ops = host_get_ops(dev);
if (!ops->detach_file)
return -ENOSYS;
if (dev == host_get_cur_dev())
host_set_cur_dev(NULL);
return ops->detach_file(dev);
}
struct udevice *host_find_by_label(const char *label)
{
struct udevice *dev;
struct uclass *uc;
uclass_id_foreach_dev(UCLASS_HOST, dev, uc) {
struct host_sb_plat *plat = dev_get_plat(dev);
if (plat->label && !strcmp(label, plat->label))
return dev;
}
return NULL;
}
struct udevice *host_get_cur_dev(void)
{
struct uclass *uc = uclass_find(UCLASS_HOST);
if (uc) {
struct host_priv *priv = uclass_get_priv(uc);
return priv->cur_dev;
}
return NULL;
}
void host_set_cur_dev(struct udevice *dev)
{
struct uclass *uc = uclass_find(UCLASS_HOST);
if (uc) {
struct host_priv *priv = uclass_get_priv(uc);
priv->cur_dev = dev;
}
}
UCLASS_DRIVER(host) = {
.id = UCLASS_HOST,
.name = "host",
#if CONFIG_IS_ENABLED(OF_REAL)
.post_bind = dm_scan_fdt_dev,
#endif
.priv_auto = sizeof(struct host_priv),
};
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