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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (C) 2013 Henrik Nordstrom <henrik@henriknordstrom.net>
*/
#include <common.h>
#include <blk.h>
#include <dm.h>
#include <fdtdec.h>
#include <part.h>
#include <os.h>
#include <malloc.h>
#include <sandboxblockdev.h>
#include <asm/global_data.h>
#include <dm/device_compat.h>
#include <linux/errno.h>
#include <dm/device-internal.h>
DECLARE_GLOBAL_DATA_PTR;
static unsigned long host_block_read(struct udevice *dev,
unsigned long start, lbaint_t blkcnt,
void *buffer)
{
struct host_block_dev *host_dev = dev_get_plat(dev);
struct blk_desc *block_dev = dev_get_uclass_plat(dev);
if (os_lseek(host_dev->fd, start * block_dev->blksz, OS_SEEK_SET) ==
-1) {
printf("ERROR: Invalid block %lx\n", start);
return -1;
}
ssize_t len = os_read(host_dev->fd, buffer, blkcnt * block_dev->blksz);
if (len >= 0)
return len / block_dev->blksz;
return -1;
}
static unsigned long host_block_write(struct udevice *dev,
unsigned long start, lbaint_t blkcnt,
const void *buffer)
{
struct host_block_dev *host_dev = dev_get_plat(dev);
struct blk_desc *block_dev = dev_get_uclass_plat(dev);
if (os_lseek(host_dev->fd, start * block_dev->blksz, OS_SEEK_SET) ==
-1) {
printf("ERROR: Invalid block %lx\n", start);
return -1;
}
ssize_t len = os_write(host_dev->fd, buffer, blkcnt * block_dev->blksz);
if (len >= 0)
return len / block_dev->blksz;
return -1;
}
int host_dev_bind(int devnum, char *filename, bool removable)
{
struct host_block_dev *host_dev;
struct udevice *dev;
struct blk_desc *desc;
char dev_name[20], *str, *fname;
int ret, fd;
/* Remove and unbind the old device, if any */
ret = blk_get_device(UCLASS_ROOT, devnum, &dev);
if (ret == 0) {
ret = device_remove(dev, DM_REMOVE_NORMAL);
if (ret)
return ret;
ret = device_unbind(dev);
if (ret)
return ret;
} else if (ret != -ENODEV) {
return ret;
}
if (!filename)
return 0;
snprintf(dev_name, sizeof(dev_name), "host%d", devnum);
str = strdup(dev_name);
if (!str)
return -ENOMEM;
fname = strdup(filename);
if (!fname) {
free(str);
return -ENOMEM;
}
fd = os_open(filename, OS_O_RDWR);
if (fd == -1) {
printf("Failed to access host backing file '%s', trying read-only\n",
filename);
fd = os_open(filename, OS_O_RDONLY);
if (fd == -1) {
printf("- still failed\n");
ret = -ENOENT;
goto err;
}
}
ret = blk_create_device(gd->dm_root, "sandbox_host_blk", str,
UCLASS_ROOT, devnum, 512,
os_lseek(fd, 0, OS_SEEK_END) / 512, &dev);
if (ret)
goto err_file;
host_dev = dev_get_plat(dev);
host_dev->fd = fd;
host_dev->filename = fname;
ret = device_probe(dev);
if (ret) {
device_unbind(dev);
goto err_file;
}
desc = blk_get_devnum_by_uclass_id(UCLASS_ROOT, devnum);
desc->removable = removable;
snprintf(desc->vendor, BLK_VEN_SIZE, "U-Boot");
snprintf(desc->product, BLK_PRD_SIZE, "hostfile");
snprintf(desc->revision, BLK_REV_SIZE, "1.0");
return 0;
err_file:
os_close(fd);
err:
free(fname);
free(str);
return ret;
}
int host_get_dev_err(int devnum, struct blk_desc **blk_devp)
{
struct udevice *dev;
int ret;
ret = blk_get_device(UCLASS_ROOT, devnum, &dev);
if (ret)
return ret;
*blk_devp = dev_get_uclass_plat(dev);
return 0;
}
int sandbox_host_unbind(struct udevice *dev)
{
struct host_block_dev *host_dev;
/* Data validity is checked in host_dev_bind() */
host_dev = dev_get_plat(dev);
os_close(host_dev->fd);
return 0;
}
static const struct blk_ops sandbox_host_blk_ops = {
.read = host_block_read,
.write = host_block_write,
};
U_BOOT_DRIVER(sandbox_host_blk) = {
.name = "sandbox_host_blk",
.id = UCLASS_BLK,
.ops = &sandbox_host_blk_ops,
.unbind = sandbox_host_unbind,
.plat_auto = sizeof(struct host_block_dev),
};
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