109 lines
2.5 KiB
C
109 lines
2.5 KiB
C
/*
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* hostfile.c - use files from the host to simalute barebox devices
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*
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* Copyright (c) 2007 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <common.h>
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#include <driver.h>
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#include <malloc.h>
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#include <mach/linux.h>
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#include <init.h>
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#include <errno.h>
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#include <mach/hostfile.h>
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#include <xfuncs.h>
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struct hf_priv {
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struct cdev cdev;
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struct hf_platform_data *pdata;
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};
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static ssize_t hf_read(struct cdev *cdev, void *buf, size_t count, loff_t offset, ulong flags)
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{
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struct hf_platform_data *hf = cdev->priv;
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int fd = hf->fd;
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if (linux_lseek(fd, offset) != offset)
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return -EINVAL;
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return linux_read(fd, buf, count);
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}
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static ssize_t hf_write(struct cdev *cdev, const void *buf, size_t count, loff_t offset, ulong flags)
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{
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struct hf_platform_data *hf = cdev->priv;
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int fd = hf->fd;
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if (linux_lseek(fd, offset) != offset)
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return -EINVAL;
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return linux_write(fd, buf, count);
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}
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static void hf_info(struct device_d *dev)
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{
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struct hf_platform_data *hf = dev->platform_data;
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printf("file: %s\n", hf->filename);
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}
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static struct file_operations hf_fops = {
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.read = hf_read,
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.write = hf_write,
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.lseek = dev_lseek_default,
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};
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static int hf_probe(struct device_d *dev)
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{
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struct hf_platform_data *hf = dev->platform_data;
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struct hf_priv *priv = xzalloc(sizeof(*priv));
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priv->pdata = hf;
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priv->cdev.name = hf->name;
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priv->cdev.size = hf->size;
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priv->cdev.ops = &hf_fops;
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priv->cdev.priv = hf;
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#ifdef CONFIG_FS_DEVFS
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devfs_create(&priv->cdev);
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#endif
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return 0;
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}
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static struct driver_d hf_drv = {
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.name = "hostfile",
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.probe = hf_probe,
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.info = hf_info,
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};
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static int hf_init(void)
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{
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return register_driver(&hf_drv);
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}
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device_initcall(hf_init);
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int barebox_register_filedev(struct hf_platform_data *hf)
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{
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return !add_generic_device("hostfile", DEVICE_ID_DYNAMIC, NULL, hf->base, hf->size,
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IORESOURCE_MEM, hf);
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}
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