Because that's what it is. 'inode' will become confusing once we support real inodes. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
220 lines
5 KiB
C
220 lines
5 KiB
C
/*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <malloc.h>
|
|
#include <fs.h>
|
|
#include <fcntl.h>
|
|
#include <init.h>
|
|
#include <linux/stat.h>
|
|
#include <linux/err.h>
|
|
#include <mach/omap4_rom_usb.h>
|
|
|
|
#define OMAP4_USBBOOT_FS_MAGIC 0x5562464D
|
|
#define OMAP4_USBBOOT_FS_CMD_OPEN 0x46530000
|
|
#define OMAP4_USBBOOT_FS_CMD_CLOSE 0x46530001
|
|
#define OMAP4_USBBOOT_FS_CMD_READ 0x46530002
|
|
#define OMAP4_USBBOOT_FS_CMD_END 0x4653FFFF
|
|
|
|
struct file_priv {
|
|
s32 id;
|
|
u32 size;
|
|
};
|
|
/*
|
|
static int omap4_usbbootfs_create(
|
|
struct device_d *dev, const char *pathname, mode_t mode)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static int omap4_usbbootfs_unlink(struct device_d *dev, const char *pathname)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static int omap4_usbbootfs_mkdir(struct device_d *dev, const char *pathname)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static int omap4_usbbootfs_rmdir(struct device_d *dev, const char *pathname)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static int omap4_usbbootfs_write(
|
|
struct device_d *_dev, FILE *f, const void *inbuf, size_t size)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
|
|
static int omap4_usbbootfs_truncate(struct device_d *dev, FILE *f, ulong size)
|
|
{
|
|
return -ENOSYS;
|
|
}
|
|
*/
|
|
|
|
static struct file_priv *omap4_usbbootfs_do_open(
|
|
struct device_d *dev, int accmode, const char *filename)
|
|
{
|
|
struct file_priv *priv;
|
|
u32 data;
|
|
|
|
if (accmode & O_ACCMODE)
|
|
return ERR_PTR(-ENOSYS);
|
|
|
|
priv = xzalloc(sizeof(*priv));
|
|
if (!priv)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
data = OMAP4_USBBOOT_FS_MAGIC ; omap4_usbboot_write(&data, 4);
|
|
data = OMAP4_USBBOOT_FS_CMD_OPEN; omap4_usbboot_write(&data, 4);
|
|
omap4_usbboot_puts(filename);
|
|
data = OMAP4_USBBOOT_FS_CMD_END ; omap4_usbboot_write(&data, 4);
|
|
|
|
if (omap4_usbboot_read(&priv->id, 4) ||
|
|
omap4_usbboot_read(&priv->size, 4)
|
|
) {
|
|
free(priv);
|
|
return ERR_PTR(-EIO);
|
|
}
|
|
if (priv->id < 0) {
|
|
free(priv);
|
|
return ERR_PTR(-ENOENT);
|
|
}
|
|
|
|
return priv;
|
|
}
|
|
|
|
static int omap4_usbbootfs_open(
|
|
struct device_d *dev, FILE *file, const char *filename)
|
|
{
|
|
struct file_priv *priv;
|
|
|
|
priv = omap4_usbbootfs_do_open(dev, file->flags, filename);
|
|
if (IS_ERR(priv))
|
|
return PTR_ERR(priv);
|
|
|
|
file->priv = priv;
|
|
file->size = priv->size;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int omap4_usbbootfs_do_close(struct file_priv *priv)
|
|
{
|
|
u32 data;
|
|
data = OMAP4_USBBOOT_FS_MAGIC ; omap4_usbboot_write(&data, 4);
|
|
data = OMAP4_USBBOOT_FS_CMD_CLOSE; omap4_usbboot_write(&data, 4);
|
|
omap4_usbboot_write(&priv->id, 4);
|
|
data = OMAP4_USBBOOT_FS_CMD_END ; omap4_usbboot_write(&data, 4);
|
|
free(priv);
|
|
return 0;
|
|
}
|
|
|
|
static int omap4_usbbootfs_close(struct device_d *dev, FILE *f)
|
|
{
|
|
struct file_priv *priv = f->priv;
|
|
return omap4_usbbootfs_do_close(priv);
|
|
}
|
|
|
|
static int omap4_usbbootfs_read(
|
|
struct device_d *dev, FILE *f, void *buf, size_t size)
|
|
{
|
|
struct file_priv *priv = f->priv;
|
|
u32 data;
|
|
|
|
if (size > priv->size - f->pos)
|
|
size = priv->size - f->pos;
|
|
if (!size)
|
|
return 0;
|
|
|
|
data = OMAP4_USBBOOT_FS_MAGIC ; omap4_usbboot_write(&data, 4);
|
|
data = OMAP4_USBBOOT_FS_CMD_READ; omap4_usbboot_write(&data, 4);
|
|
omap4_usbboot_write(&priv->id, 4);
|
|
omap4_usbboot_write(&f->pos, 4);
|
|
omap4_usbboot_write(&size, 4);
|
|
data = OMAP4_USBBOOT_FS_CMD_END ; omap4_usbboot_write(&data, 4);
|
|
|
|
if (omap4_usbboot_read(buf, size))
|
|
return -EIO;
|
|
|
|
return size;
|
|
}
|
|
|
|
static loff_t omap4_usbbootfs_lseek(struct device_d *dev, FILE *f, loff_t pos)
|
|
{
|
|
f->pos = pos;
|
|
return pos;
|
|
}
|
|
|
|
static DIR *omap4_usbbootfs_opendir(struct device_d *dev, const char *pathname)
|
|
{
|
|
return NULL;
|
|
}
|
|
|
|
static int omap4_usbbootfs_stat(
|
|
struct device_d *dev, const char *filename, struct stat *s)
|
|
{
|
|
struct file_priv *priv;
|
|
|
|
priv = omap4_usbbootfs_do_open(dev, O_RDONLY, filename);
|
|
if (IS_ERR(priv))
|
|
return PTR_ERR(priv);
|
|
|
|
s->st_mode = S_IFREG |
|
|
S_IRUSR | S_IRGRP | S_IROTH |
|
|
S_IXUSR | S_IXGRP | S_IXOTH ;
|
|
s->st_size = priv->size;
|
|
|
|
omap4_usbbootfs_do_close(priv);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int omap4_usbbootfs_probe(struct device_d *dev)
|
|
{
|
|
return 0;
|
|
}
|
|
static void omap4_usbbootfs_remove(struct device_d *dev)
|
|
{
|
|
}
|
|
|
|
static struct fs_driver_d omap4_usbbootfs_driver = {
|
|
.open = omap4_usbbootfs_open,
|
|
.close = omap4_usbbootfs_close,
|
|
.read = omap4_usbbootfs_read,
|
|
.lseek = omap4_usbbootfs_lseek,
|
|
.opendir = omap4_usbbootfs_opendir,
|
|
.stat = omap4_usbbootfs_stat,
|
|
/*
|
|
.create = omap4_usbbootfs_create,
|
|
.unlink = omap4_usbbootfs_unlink,
|
|
.mkdir = omap4_usbbootfs_mkdir,
|
|
.rmdir = omap4_usbbootfs_rmdir,
|
|
.write = omap4_usbbootfs_write,
|
|
.truncate= omap4_usbbootfs_truncate,
|
|
*/
|
|
.flags = 0,
|
|
.drv = {
|
|
.probe = omap4_usbbootfs_probe,
|
|
.remove = omap4_usbbootfs_remove,
|
|
.name = "omap4_usbbootfs",
|
|
}
|
|
};
|
|
|
|
static int omap4_usbbootfs_init(void)
|
|
{
|
|
return register_fs_driver(&omap4_usbbootfs_driver);
|
|
}
|
|
coredevice_initcall(omap4_usbbootfs_init);
|