ide-floppy: factor out generic disk handling code to ide-gd-floppy.c

While at it:
- idefloppy_do_request() -> ide_floppy_do_request()
- idefloppy_end_request() -> ide_floppy_end_request()
- idefloppy_setup() -> ide_floppy_setup()

There should be no functional changes caused by this patch.

Acked-by: Borislav Petkov <petkovbb@gmail.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

1 files changed, 298 insertions, 0 deletions

diff --git a/drivers/ide/ide-gd-floppy.c b/drivers/ide/ide-gd-floppy.c
new file mode 100644
index 00000000000..7afd013b4c5
--- /dev/null
+++ b/drivers/ide/ide-gd-floppy.c
@@ -0,0 +1,298 @@
+#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(idefloppy_ref_mutex);
+
+static void idefloppy_cleanup_obj(struct kref *);
+
+static struct ide_floppy_obj *ide_floppy_get(struct gendisk *disk)
+{
+	struct ide_floppy_obj *floppy = NULL;
+
+	mutex_lock(&idefloppy_ref_mutex);
+	floppy = ide_drv_g(disk, ide_floppy_obj);
+	if (floppy) {
+		if (ide_device_get(floppy->drive))
+			floppy = NULL;
+		else
+			kref_get(&floppy->kref);
+	}
+	mutex_unlock(&idefloppy_ref_mutex);
+	return floppy;
+}
+
+static void ide_floppy_put(struct ide_floppy_obj *floppy)
+{
+	ide_drive_t *drive = floppy->drive;
+
+	mutex_lock(&idefloppy_ref_mutex);
+	kref_put(&floppy->kref, idefloppy_cleanup_obj);
+	ide_device_put(drive);
+	mutex_unlock(&idefloppy_ref_mutex);
+}
+
+sector_t ide_floppy_capacity(ide_drive_t *drive)
+{
+	return drive->capacity64;
+}
+
+static void ide_floppy_remove(ide_drive_t *drive)
+{
+	idefloppy_floppy_t *floppy = drive->driver_data;
+	struct gendisk *g = floppy->disk;
+
+	ide_proc_unregister_driver(drive, floppy->driver);
+
+	del_gendisk(g);
+
+	ide_floppy_put(floppy);
+}
+
+static void idefloppy_cleanup_obj(struct kref *kref)
+{
+	struct ide_floppy_obj *floppy = to_ide_drv(kref, ide_floppy_obj);
+	ide_drive_t *drive = floppy->drive;
+	struct gendisk *g = floppy->disk;
+
+	drive->driver_data = NULL;
+	g->private_data = NULL;
+	put_disk(g);
+	kfree(floppy);
+}
+
+static int ide_floppy_probe(ide_drive_t *);
+
+static ide_driver_t idefloppy_driver = {
+	.gen_driver = {
+		.owner		= THIS_MODULE,
+		.name		= "ide-floppy",
+		.bus		= &ide_bus_type,
+	},
+	.probe			= ide_floppy_probe,
+	.remove			= ide_floppy_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			= ide_floppy_proc,
+	.settings		= ide_floppy_settings,
+#endif
+};
+
+static int idefloppy_open(struct inode *inode, struct file *filp)
+{
+	struct gendisk *disk = inode->i_bdev->bd_disk;
+	struct ide_floppy_obj *floppy;
+	ide_drive_t *drive;
+	int ret = 0;
+
+	floppy = ide_floppy_get(disk);
+	if (!floppy)
+		return -ENXIO;
+
+	drive = floppy->drive;
+
+	ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
+
+	floppy->openers++;
+
+	if (floppy->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_floppy_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_floppy;
+		}
+
+		if ((drive->dev_flags & IDE_DFLAG_WP) && (filp->f_mode & 2)) {
+			ret = -EROFS;
+			goto out_put_floppy;
+		}
+
+		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_floppy;
+	}
+	return 0;
+
+out_put_floppy:
+	floppy->openers--;
+	ide_floppy_put(floppy);
+	return ret;
+}
+
+static int idefloppy_release(struct inode *inode, struct file *filp)
+{
+	struct gendisk *disk = inode->i_bdev->bd_disk;
+	struct ide_floppy_obj *floppy = ide_drv_g(disk, ide_floppy_obj);
+	ide_drive_t *drive = floppy->drive;
+
+	ide_debug_log(IDE_DBG_FUNC, "Call %s\n", __func__);
+
+	if (floppy->openers == 1) {
+		ide_set_media_lock(drive, disk, 0);
+		drive->dev_flags &= ~IDE_DFLAG_FORMAT_IN_PROGRESS;
+	}
+
+	floppy->openers--;
+
+	ide_floppy_put(floppy);
+
+	return 0;
+}
+
+static int idefloppy_getgeo(struct block_device *bdev, struct hd_geometry *geo)
+{
+	struct ide_floppy_obj *floppy = ide_drv_g(bdev->bd_disk,
+						     ide_floppy_obj);
+	ide_drive_t *drive = floppy->drive;
+
+	geo->heads = drive->bios_head;
+	geo->sectors = drive->bios_sect;
+	geo->cylinders = (u16)drive->bios_cyl; /* truncate */
+	return 0;
+}
+
+static int idefloppy_media_changed(struct gendisk *disk)
+{
+	struct ide_floppy_obj *floppy = ide_drv_g(disk, ide_floppy_obj);
+	ide_drive_t *drive = floppy->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 idefloppy_revalidate_disk(struct gendisk *disk)
+{
+	struct ide_floppy_obj *floppy = ide_drv_g(disk, ide_floppy_obj);
+	set_capacity(disk, ide_floppy_capacity(floppy->drive));
+	return 0;
+}
+
+static struct block_device_operations idefloppy_ops = {
+	.owner			= THIS_MODULE,
+	.open			= idefloppy_open,
+	.release		= idefloppy_release,
+	.ioctl			= ide_floppy_ioctl,
+	.getgeo			= idefloppy_getgeo,
+	.media_changed		= idefloppy_media_changed,
+	.revalidate_disk	= idefloppy_revalidate_disk
+};
+
+static int ide_floppy_probe(ide_drive_t *drive)
+{
+	idefloppy_floppy_t *floppy;
+	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;
+	}
+	floppy = kzalloc(sizeof(idefloppy_floppy_t), GFP_KERNEL);
+	if (!floppy) {
+		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_floppy;
+
+	ide_init_disk(g, drive);
+
+	kref_init(&floppy->kref);
+
+	floppy->drive = drive;
+	floppy->driver = &idefloppy_driver;
+	floppy->disk = g;
+
+	g->private_data = &floppy->driver;
+
+	drive->driver_data = floppy;
+
+	drive->debug_mask = debug_mask;
+
+	ide_floppy_setup(drive);
+
+	set_capacity(g, ide_floppy_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 = &idefloppy_ops;
+	add_disk(g);
+	return 0;
+
+out_free_floppy:
+	kfree(floppy);
+failed:
+	return -ENODEV;
+}
+
+static int __init idefloppy_init(void)
+{
+	printk(KERN_INFO DRV_NAME " driver " IDEFLOPPY_VERSION "\n");
+	return driver_register(&idefloppy_driver.gen_driver);
+}
+
+static void __exit idefloppy_exit(void)
+{
+	driver_unregister(&idefloppy_driver.gen_driver);
+}
+
+MODULE_ALIAS("ide:*m-floppy*");
+MODULE_ALIAS("ide-floppy");
+module_init(idefloppy_init);
+module_exit(idefloppy_exit);
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("ATAPI FLOPPY Driver");