path: root/drivers/usb/storage/alauda.c

/*
 * Driver for Alauda-based card readers
 *
 * Current development and maintenance by:
 *   (c) 2005 Daniel Drake <dsd@gentoo.org>
 *
 * The 'Alauda' is a chip manufacturered by RATOC for OEM use.
 *
 * Alauda implements a vendor-specific command set to access two media reader
 * ports (XD, SmartMedia). This driver converts SCSI commands to the commands
 * which are accepted by these devices.
 *
 * The driver was developed through reverse-engineering, with the help of the
 * sddr09 driver which has many similarities, and with some help from the
 * (very old) vendor-supplied GPL sma03 driver.
 *
 * For protocol info, see http://alauda.sourceforge.net
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the
 * Free Software Foundation; either version 2, or (at your option) any
 * later version.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/module.h>
#include <linux/slab.h>

#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>

#include "usb.h"
#include "transport.h"
#include "protocol.h"
#include "debug.h"

MODULE_DESCRIPTION("Driver for Alauda-based card readers");
MODULE_AUTHOR("Daniel Drake <dsd@gentoo.org>");
MODULE_LICENSE("GPL");

/*
 * Status bytes
 */
#define ALAUDA_STATUS_ERROR		0x01
#define ALAUDA_STATUS_READY		0x40

/*
 * Control opcodes (for request field)
 */
#define ALAUDA_GET_XD_MEDIA_STATUS	0x08
#define ALAUDA_GET_SM_MEDIA_STATUS	0x98
#define ALAUDA_ACK_XD_MEDIA_CHANGE	0x0a
#define ALAUDA_ACK_SM_MEDIA_CHANGE	0x9a
#define ALAUDA_GET_XD_MEDIA_SIG		0x86
#define ALAUDA_GET_SM_MEDIA_SIG		0x96

/*
 * Bulk command identity (byte 0)
 */
#define ALAUDA_BULK_CMD			0x40

/*
 * Bulk opcodes (byte 1)
 */
#define ALAUDA_BULK_GET_REDU_DATA	0x85
#define ALAUDA_BULK_READ_BLOCK		0x94
#define ALAUDA_BULK_ERASE_BLOCK		0xa3
#define ALAUDA_BULK_WRITE_BLOCK		0xb4
#define ALAUDA_BULK_GET_STATUS2		0xb7
#define ALAUDA_BULK_RESET_MEDIA		0xe0

/*
 * Port to operate on (byte 8)
 */
#define ALAUDA_PORT_XD			0x00
#define ALAUDA_PORT_SM			0x01

/*
 * LBA and PBA are unsigned ints. Special values.
 */
#define UNDEF    0xffff
#define SPARE    0xfffe
#define UNUSABLE 0xfffd

struct alauda_media_info {
	unsigned long capacity;		/* total media size in bytes */
	unsigned int pagesize;		/* page size in bytes */
	unsigned int blocksize;		/* number of pages per block */
	unsigned int uzonesize;		/* number of usable blocks per zone */
	unsigned int zonesize;		/* number of blocks per zone */
	unsigned int blockmask;		/* mask to get page from address */

	unsigned char pageshift;
	unsigned char blockshift;
	unsigned char zoneshift;

	u16 **lba_to_pba;		/* logical to physical block map */
	u16 **pba_to_lba;		/* physical to logical block map */
};

struct alauda_info {
	struct alauda_media_info port[2];
	int wr_ep;			/* endpoint to write data out of */

	unsigned char sense_key;
	unsigned long sense_asc;	/* additional sense code */
	unsigned long sense_ascq;	/* additional sense code qualifier */
};

#define short_pack(lsb,msb) ( ((u16)(lsb)) | ( ((u16)(msb))<<8 ) )
#define LSB_of(s) ((s)&0xFF)
#define MSB_of(s) ((s)>>8)

#define MEDIA_PORT(us) us->srb->device->lun
#define MEDIA_INFO(us) ((struct alauda_info *)us->extra)->port[MEDIA_PORT(us)]

#define PBA_LO(pba) ((pba & 0xF) << 5)
#define PBA_HI(pba) (pba >> 3)
#define PBA_ZONE(pba) (pba >> 11)

static int init_alauda(struct us_data *us);


/*
 * The table of devices
 */
#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
		    vendorName, productName, useProtocol, useTransport, \
		    initFunction, flags) \
{ USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
  .driver_info = (flags)|(USB_US_TYPE_STOR<<24) }

static struct usb_device_id alauda_usb_ids[] = {
#	include "unusual_alauda.h"
	{ }		/* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, alauda_usb_ids);

#undef UNUSUAL_DEV

/*
 * The flags table
 */
#define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
		    vendor_name, product_name, use_protocol, use_transport, \
		    init_function, Flags) \
{ \
	.vendorName = vendor_name,	\
	.productName = product_name,	\
	.useProtocol = use_protocol,	\
	.useTransport = use_transport,	\
	.initFunction = init_function,	\
}

static