omap4: add filesystem support over usb boot
Signed-off-by: Vicente <vicencb@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
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ea43a5e296
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64254636af
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@ -29,6 +29,11 @@ config FS_TFTP
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prompt "tftp support"
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depends on NET
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config FS_OMAP4_USBBOOT
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bool
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prompt "Filesystem over usb boot"
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depends on OMAP4_USBBOOT
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config FS_NFS
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depends on NET
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bool
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@ -5,4 +5,5 @@ obj-$(CONFIG_FS_DEVFS) += devfs.o
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obj-$(CONFIG_FS_FAT) += fat/
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obj-y += fs.o
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obj-$(CONFIG_FS_TFTP) += tftp.o
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obj-$(CONFIG_FS_OMAP4_USBBOOT) += omap4_usbbootfs.o
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obj-$(CONFIG_FS_NFS) += nfs.o
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@ -0,0 +1,219 @@
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/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of
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* the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <common.h>
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#include <malloc.h>
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#include <fs.h>
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#include <fcntl.h>
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#include <init.h>
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#include <linux/stat.h>
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#include <linux/err.h>
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#include <mach/omap4_rom_usb.h>
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#define OMAP4_USBBOOT_FS_MAGIC 0x5562464D
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#define OMAP4_USBBOOT_FS_CMD_OPEN 0x46530000
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#define OMAP4_USBBOOT_FS_CMD_CLOSE 0x46530001
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#define OMAP4_USBBOOT_FS_CMD_READ 0x46530002
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#define OMAP4_USBBOOT_FS_CMD_END 0x4653FFFF
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struct file_priv {
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s32 id;
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u32 size;
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};
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/*
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static int omap4_usbbootfs_create(
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struct device_d *dev, const char *pathname, mode_t mode)
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{
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return -ENOSYS;
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}
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static int omap4_usbbootfs_unlink(struct device_d *dev, const char *pathname)
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{
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return -ENOSYS;
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}
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static int omap4_usbbootfs_mkdir(struct device_d *dev, const char *pathname)
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{
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return -ENOSYS;
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}
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static int omap4_usbbootfs_rmdir(struct device_d *dev, const char *pathname)
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{
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return -ENOSYS;
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}
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static int omap4_usbbootfs_write(
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struct device_d *_dev, FILE *f, const void *inbuf, size_t size)
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{
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return -ENOSYS;
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}
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static int omap4_usbbootfs_truncate(struct device_d *dev, FILE *f, ulong size)
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{
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return -ENOSYS;
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}
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*/
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static struct file_priv *omap4_usbbootfs_do_open(
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struct device_d *dev, int accmode, const char *filename)
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{
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struct file_priv *priv;
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u32 data;
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if (accmode & O_ACCMODE)
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return ERR_PTR(-ENOSYS);
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priv = xzalloc(sizeof(*priv));
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if (!priv)
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return ERR_PTR(-ENOMEM);
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data = OMAP4_USBBOOT_FS_MAGIC ; omap4_usbboot_write(&data, 4);
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data = OMAP4_USBBOOT_FS_CMD_OPEN; omap4_usbboot_write(&data, 4);
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omap4_usbboot_puts(filename);
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data = OMAP4_USBBOOT_FS_CMD_END ; omap4_usbboot_write(&data, 4);
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if (omap4_usbboot_read(&priv->id, 4) ||
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omap4_usbboot_read(&priv->size, 4)
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) {
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free(priv);
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return ERR_PTR(-EIO);
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}
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if (priv->id < 0) {
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free(priv);
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return ERR_PTR(-ENOENT);
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}
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return priv;
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}
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static int omap4_usbbootfs_open(
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struct device_d *dev, FILE *file, const char *filename)
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{
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struct file_priv *priv;
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priv = omap4_usbbootfs_do_open(dev, file->flags, filename);
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if (IS_ERR(priv))
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return PTR_ERR(priv);
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file->inode = priv;
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file->size = priv->size;
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return 0;
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}
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static int omap4_usbbootfs_do_close(struct file_priv *priv)
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{
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u32 data;
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data = OMAP4_USBBOOT_FS_MAGIC ; omap4_usbboot_write(&data, 4);
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data = OMAP4_USBBOOT_FS_CMD_CLOSE; omap4_usbboot_write(&data, 4);
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omap4_usbboot_write(&priv->id, 4);
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data = OMAP4_USBBOOT_FS_CMD_END ; omap4_usbboot_write(&data, 4);
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free(priv);
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return 0;
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}
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static int omap4_usbbootfs_close(struct device_d *dev, FILE *f)
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{
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struct file_priv *priv = f->inode;
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return omap4_usbbootfs_do_close(priv);
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}
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static int omap4_usbbootfs_read(
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struct device_d *dev, FILE *f, void *buf, size_t size)
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{
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struct file_priv *priv = f->inode;
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u32 data;
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if (size > priv->size - f->pos)
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size = priv->size - f->pos;
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if (!size)
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return 0;
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data = OMAP4_USBBOOT_FS_MAGIC ; omap4_usbboot_write(&data, 4);
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data = OMAP4_USBBOOT_FS_CMD_READ; omap4_usbboot_write(&data, 4);
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omap4_usbboot_write(&priv->id, 4);
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omap4_usbboot_write(&f->pos, 4);
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omap4_usbboot_write(&size, 4);
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data = OMAP4_USBBOOT_FS_CMD_END ; omap4_usbboot_write(&data, 4);
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if (omap4_usbboot_read(buf, size))
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return -EIO;
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return size;
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}
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static loff_t omap4_usbbootfs_lseek(struct device_d *dev, FILE *f, loff_t pos)
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{
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f->pos = pos;
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return pos;
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}
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static DIR *omap4_usbbootfs_opendir(struct device_d *dev, const char *pathname)
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{
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return NULL;
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}
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static int omap4_usbbootfs_stat(
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struct device_d *dev, const char *filename, struct stat *s)
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{
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struct file_priv *priv;
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priv = omap4_usbbootfs_do_open(dev, O_RDONLY, filename);
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if (IS_ERR(priv))
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return PTR_ERR(priv);
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s->st_mode = S_IFREG |
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S_IRUSR | S_IRGRP | S_IROTH |
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S_IXUSR | S_IXGRP | S_IXOTH ;
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s->st_size = priv->size;
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omap4_usbbootfs_do_close(priv);
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return 0;
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}
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static int omap4_usbbootfs_probe(struct device_d *dev)
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{
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return 0;
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}
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static void omap4_usbbootfs_remove(struct device_d *dev)
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{
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}
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static struct fs_driver_d omap4_usbbootfs_driver = {
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.open = omap4_usbbootfs_open,
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.close = omap4_usbbootfs_close,
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.read = omap4_usbbootfs_read,
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.lseek = omap4_usbbootfs_lseek,
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.opendir = omap4_usbbootfs_opendir,
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.stat = omap4_usbbootfs_stat,
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/*
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.create = omap4_usbbootfs_create,
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.unlink = omap4_usbbootfs_unlink,
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.mkdir = omap4_usbbootfs_mkdir,
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.rmdir = omap4_usbbootfs_rmdir,
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.write = omap4_usbbootfs_write,
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.truncate= omap4_usbbootfs_truncate,
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*/
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.flags = 0,
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.drv = {
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.probe = omap4_usbbootfs_probe,
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.remove = omap4_usbbootfs_remove,
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.name = "omap4_usbbootfs",
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}
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};
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static int omap4_usbbootfs_init(void)
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{
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return register_fs_driver(&omap4_usbbootfs_driver);
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}
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coredevice_initcall(omap4_usbbootfs_init);
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