Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

#include <linux/vmalloc.h>

#include <linux/module.h>

#include <linux/fs.h>

#include <linux/mm.h>

#include <linux/slab.h>

#include <linux/sched.h>

#include <asm/uaccess.h>

#include "oss/sound_firmware.h"

static int do_mod_firmware_load(const char *fn, char **fp)

{

        struct file* filp;

        long l;

        char *dp;

        loff_t pos;

        filp = filp_open(fn, 0, 0);

        if (IS_ERR(filp))

        {

                printk(KERN_INFO "Unable to load '%s'.\n", fn);

                return 0;

        }

        l = filp->f_path.dentry->d_inode->i_size;

        if (l <= 0 || l > 131072)

        {

                printk(KERN_INFO "Invalid firmware '%s'\n", fn);

                filp_close(filp, current->files);

                return 0;

        }

        dp = vmalloc(l);

        if (dp == NULL)

        {

                printk(KERN_INFO "Out of memory loading '%s'.\n", fn);

                filp_close(filp, current->files);

                return 0;

        }

        pos = 0;

        if (vfs_read(filp, dp, l, &pos) != l)

        {

                printk(KERN_INFO "Failed to read '%s'.\n", fn);

                vfree(dp);

                filp_close(filp, current->files);

                return 0;

        }

        filp_close(filp, current->files);

        *fp = dp;

        return (int) l;

}

/**

 *      mod_firmware_load - load sound driver firmware

 *      @fn: filename

 *      @fp: return for the buffer.

 *

 *      Load the firmware for a sound module (up to 128K) into a buffer.

 *      The buffer is returned in *fp. It is allocated with vmalloc so is

 *      virtually linear and not DMAable. The caller should free it with

 *      vfree when finished.

 *

 *      The length of the buffer is returned on a successful load, the

 *      value zero on a failure.

 *

 *      Caution: This API is not recommended. Firmware should be loaded via

 *      request_firmware.

 */

int mod_firmware_load(const char *fn, char **fp)

{

        int r;

        mm_segment_t fs = get_fs();

        set_fs(get_ds());

        r = do_mod_firmware_load(fn, fp);

        set_fs(fs);

        return r;

}

EXPORT_SYMBOL(mod_firmware_load);

MODULE_LICENSE("GPL");