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#include <linux/module.h>
#include <linux/types.h>
#include <linux/string.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/genhd.h>
#include <linux/mutex.h>
#include <linux/ide.h>
#include <linux/hdreg.h>
#include "ide-floppy.h"
#define IDEFLOPPY_VERSION "1.00"
/* module parameters */
static unsigned long debug_mask;
module_param(debug_mask, ulong, 0644);
static DEFINE_MUTEX(ide_disk_ref_mutex);
static void ide_disk_release(struct kref *);
static struct ide_floppy_obj *ide_disk_get(struct gendisk *disk)
{
struct ide_floppy_obj *idkp = NULL;
mutex_lock(&ide_disk_ref_mutex);
idkp = ide_drv_g(disk, ide_floppy_obj);
if (idkp) {
if (ide_device_get(idkp->drive))
idkp = NULL;
else
kref_get(&idkp->kref);
}
mutex_unlock(&ide_disk_ref_mutex);
return idkp;
}
static void ide_disk_put(struct ide_floppy_obj *idkp)
{
ide_drive_t *drive = idkp->drive;
mutex_lock(&ide_disk_ref_mutex);
kref_put(&idkp->kref, ide_disk_release);
ide_device_put(drive);
mutex_unlock(&ide_disk_ref_mutex);
}
sector_t ide_gd_capacity(ide_drive_t *drive)
{
return drive->capacity64;
}
static int ide_gd_probe(ide_drive_t *);
static void ide_gd_remove(ide_drive_t *drive)
{
struct ide_floppy_obj *idkp = drive->driver_data;
struct gendisk *g = idkp->disk;
ide_proc_unregister_driver(drive, idkp->driver);
del_gendisk(g);
ide_disk_put(idkp);
}
static void ide_disk_release(struct kref *kref)
{
struct ide_floppy_obj *idkp = to_ide_drv(kref, ide_floppy_obj);
ide_drive_t *drive = idkp->drive;
struct gendisk *g = idkp->disk;
drive->driver_data = NULL;
g->private_data = NULL;
put_disk(g);
kfree(idkp);
}
#ifdef CONFIG_IDE_PROC_FS
static ide_proc_entry_t *ide_floppy_proc_entries(ide_drive_t *drive)
{
return ide_floppy_proc;
}
static const struct ide_proc_devset *ide_floppy_proc_devsets(ide_drive_t *drive)
{
return ide_floppy_settings;
}
#endif
static ide_driver_t ide_gd_driver = {
.gen_driver = {
.owner = THIS_MODULE,
.name = "ide-floppy",
.bus = &ide_bus_type,
},
.probe = ide_gd_probe,
.remove = ide_gd_remove,
.version = IDEFLOPPY_VERSION,
.do_request = ide_floppy_do_request,
.end_request = ide_floppy_end_request,
.error = __ide_error,
#ifdef CONFIG_IDE_PROC_FS
.proc_entries = ide_floppy_proc_entries,
.proc_devsets = ide_floppy_proc_devsets,
#endif
};
static int ide_gd_open(struct inode *inode, struct file *filp)
{
struct gendisk *disk = inode->i_bdev->bd_disk;
struct ide_floppy_obj *idkp;
ide_drive_t *drive;
int ret = 0;
idkp = ide_disk_get(disk);
if (idkp == NULL)
return -ENXIO;
drive = idkp->drive;
ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
idkp->openers++;
if (idkp->openers == 1) {
drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS;
/* Just in case */
if (ide_do_test_unit_ready(drive, disk))
ide_do_start_stop(drive, disk, 1);
ret = ide_floppy_get_capacity(drive);
set_capacity(disk, ide_gd_capacity(drive));
if (ret && (filp->f_flags & O_NDELAY) == 0) {
/*
* Allow O_NDELAY to open a drive without a disk, or with an
* unreadable disk, so that we can get the format capacity
* of the drive or begin the format - Sam
*/
ret = -EIO;
goto out_put_idkp;
}
if ((drive->dev_flags & IDE_DFLAG_WP) && (filp->f_mode & 2)) {
ret = -EROFS;
goto out_put_idkp;
}
ide_set_media_lock(drive, disk, 1);
drive->dev_flags |= IDE_DFLAG_MEDIA_CHANGED;
check_disk_change(inode->i_bdev);
} else if (drive->dev_flags & IDE_DFLAG_FORMAT_IN_PROGRESS) {
ret = -EBUSY;
goto out_put_idkp;
}
return 0;
out_put_idkp:
idkp->openers--;
ide_disk_put(idkp);
return ret;
}
static int ide_gd_release(struct inode *inode, struct file *filp)
{
struct gendisk *disk = inode->i_bdev->bd_disk;
struct ide_floppy_obj *idkp = ide_drv_g(disk, ide_floppy_obj);
ide_drive_t *drive = idkp->drive;
ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
if (idkp->openers == 1) {
ide_set_media_lock(drive, disk, 0);
drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS;
}
idkp->openers--;
ide_disk_put(idkp);
return 0;
}
static int ide_gd_getgeo(struct block_device *bdev, struct hd_geometry *geo)
{
struct ide_floppy_obj *idkp = ide_drv_g(bdev->bd_disk, ide_floppy_obj);
ide_drive_t *drive = idkp->drive;
geo->heads = drive->bios_head;
geo->sectors = drive->bios_sect;
geo->cylinders = (u16)drive->bios_cyl; /* truncate */
return 0;
}
static int ide_gd_media_changed(struct gendisk *disk)
{
struct ide_floppy_obj *idkp = ide_drv_g(disk, ide_floppy_obj);
ide_drive_t *drive = idkp->drive;
int ret;
/* do not scan partitions twice if this is a removable device */
if (drive->dev_flags & IDE_DFLAG_ATTACH) {
drive->dev_flags &= ~IDE_DFLAG_ATTACH;
return 0;
}
ret = !!(drive->dev_flags & IDE_DFLAG_MEDIA_CHANGED);
drive->dev_flags &= ~IDE_DFLAG_MEDIA_CHANGED;
return ret;
}
static int ide_gd_revalidate_disk(struct gendisk *disk)
{
struct ide_floppy_obj *idkp = ide_drv_g(disk, ide_floppy_obj);
set_capacity(disk, ide_gd_capacity(idkp->drive));
return 0;
}
static struct block_device_operations ide_gd_ops = {
.owner = THIS_MODULE,
.open = ide_gd_open,
.release = ide_gd_release,
.ioctl = ide_floppy_ioctl,
.getgeo = ide_gd_getgeo,
.media_changed = ide_gd_media_changed,
.revalidate_disk = ide_gd_revalidate_disk
};
static int ide_gd_probe(ide_drive_t *drive)
{
struct ide_floppy_obj *idkp;
struct gendisk *g;
if (!strstr("ide-floppy", drive->driver_req))
goto failed;
if (drive->media != ide_floppy)
goto failed;
if (!ide_check_atapi_device(drive, DRV_NAME)) {
printk(KERN_ERR PFX "%s: not supported by this version of "
DRV_NAME "\n", drive->name);
goto failed;
}
idkp = kzalloc(sizeof(*idkp), GFP_KERNEL);
if (!idkp) {
printk(KERN_ERR PFX "%s: Can't allocate a floppy structure\n",
drive->name);
goto failed;
}
g = alloc_disk_node(1 << PARTN_BITS, hwif_to_node(drive->hwif));
if (!g)
goto out_free_idkp;
ide_init_disk(g, drive);
kref_init(&idkp->kref);
idkp->drive = drive;
idkp->driver = &ide_gd_driver;
idkp->disk = g;
g->private_data = &idkp->driver;
drive->driver_data = idkp;
drive->debug_mask = debug_mask;
ide_floppy_setup(drive);
set_capacity(g, ide_gd_capacity(drive));
g->minors = 1 << PARTN_BITS;
g->driverfs_dev = &drive->gendev;
if (drive->dev_flags & IDE_DFLAG_REMOVABLE)
g->flags = GENHD_FL_REMOVABLE;
g->fops = &ide_gd_ops;
add_disk(g);
return 0;
out_free_idkp:
kfree(idkp);
failed:
return -ENODEV;
}
static int __init ide_gd_init(void)
{
printk(KERN_INFO DRV_NAME " driver " IDEFLOPPY_VERSION "\n");
return driver_register(&ide_gd_driver.gen_driver);
}
static void __exit ide_gd_exit(void)
{
driver_unregister(&ide_gd_driver.gen_driver);
}
MODULE_ALIAS("ide:*m-floppy*");
MODULE_ALIAS("ide-floppy");
module_init(ide_gd_init);
module_exit(ide_gd_exit);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("ATAPI FLOPPY Driver");
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