[deliverable/linux.git] / drivers / usb / storage / jumpshot.c

/*
 * Driver for Lexar "Jumpshot" Compact Flash reader
 *
 * jumpshot driver v0.1:
 *
 * First release
 *
 * Current development and maintenance by:
 *   (c) 2000 Jimmie Mayfield (mayfield+usb@sackheads.org)
 *
 *   Many thanks to Robert Baruch for the SanDisk SmartMedia reader driver
 *   which I used as a template for this driver.
 *
 *   Some bugfixes and scatter-gather code by Gregory P. Smith 
 *   (greg-usb@electricrain.com)
 *
 *   Fix for media change by Joerg Schneider (js@joergschneider.com)
 *
 * Developed with the assistance of:
 *
 *   (C) 2002 Alan Stern <stern@rowland.org>
 *
 * 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.
 */
 
 /*
  * This driver attempts to support the Lexar Jumpshot USB CompactFlash 
  * reader.  Like many other USB CompactFlash readers, the Jumpshot contains
  * a USB-to-ATA chip. 
  *
  * This driver supports reading and writing.  If you're truly paranoid,
  * however, you can force the driver into a write-protected state by setting
  * the WP enable bits in jumpshot_handle_mode_sense.  See the comments
  * in that routine.
  */

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

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

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

#define DRV_NAME "ums-jumpshot"

MODULE_DESCRIPTION("Driver for Lexar \"Jumpshot\" Compact Flash reader");
MODULE_AUTHOR("Jimmie Mayfield <mayfield+usb@sackheads.org>");
MODULE_LICENSE("GPL");

/*
 * 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) }

static struct usb_device_id jumpshot_usb_ids[] = {
#	include "unusual_jumpshot.h"
	{ }		/* Terminating entry */
};
MODULE_DEVICE_TABLE(usb, jumpshot_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 struct us_unusual_dev jumpshot_unusual_dev_list[] = {
#	include "unusual_jumpshot.h"
	{ }		/* Terminating entry */
};

#undef UNUSUAL_DEV


struct jumpshot_info {
   unsigned long   sectors;     /* total sector count */
   unsigned long   ssize;       /* sector size in bytes */

   /* the following aren't used yet */
   unsigned char   sense_key;
   unsigned long   sense_asc;   /* additional sense code */
   unsigned long   sense_ascq;  /* additional sense code qualifier */
};

static inline int jumpshot_bulk_read(struct us_data *us,
				     unsigned char *data, 
				     unsigned int len)
{
	if (len == 0)
		return USB_STOR_XFER_GOOD;

	usb_stor_dbg(us, "len = %d\n", len);
	return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
			data, len, NULL);
}


static inline int jumpshot_bulk_write(struct us_data *us,
				      unsigned char *data, 
				      unsigned int len)
{
	if (len == 0)
		return USB_STOR_XFER_GOOD;

	usb_stor_dbg(us, "len = %d\n", len);
	return usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
			data, len, NULL);
}


static int jumpshot_get_status(struct us_data  *us)
{
	int rc;

	if (!us)
		return USB_STOR_TRANSPORT_ERROR;

	// send the setup
	rc = usb_stor_ctrl_transfer(us, us->recv_ctrl_pipe,
				   0, 0xA0, 0, 7, us->iobuf, 1);

	if (rc != USB_STOR_XFER_GOOD)
		return USB_STOR_TRANSPORT_ERROR;

	if (us->iobuf[0] != 0x50) {
		usb_stor_dbg(us, "0x%2x\n", us->iobuf[0]);
		return USB_STOR_TRANSPORT_ERROR;
	}

	return USB_STOR_TRANSPORT_GOOD;
}

static int jumpshot_read_data(struct us_data *us,
			      struct jumpshot_info *info,
			      u32 sector,
			      u32 sectors)
{
	unsigned char *command = us->iobuf;
	unsigned char *buffer;
	unsigned char  thistime;
	unsigned int totallen, alloclen;
	int len, result;
	unsigned int sg_offset = 0;
	struct scatterlist *sg = NULL;

	// we're working in LBA mode.  according to the ATA spec, 
	// we can support up to 28-bit addressing.  I don't know if Jumpshot
	// supports beyond 24-bit addressing.  It's kind of hard to test 
	// since it requires > 8GB CF card.

	if (sector > 0x0FFFFFFF)
		return USB_STOR_TRANSPORT_ERROR;

	totallen = sectors * info->ssize;

	// Since we don't read more than 64 KB at a time, we have to create
	// a bounce buffer and move the data a piece at a time between the
	// bounce buffer and the actual transfer buffer.

	alloclen = min(totallen, 65536u);
	buffer = kmalloc(alloclen, GFP_NOIO);
	if (buffer == NULL)
		return USB_STOR_TRANSPORT_ERROR;

	do {
		// loop, never allocate or transfer more than 64k at once
		// (min(128k, 255*info->ssize) is the real limit)
		len = min(totallen, alloclen);
		thistime = (len / info->ssize) & 0xff;

		command[0] = 0;
		command[1] = thistime;
		command[2] = sector & 0xFF;
		command[3] = (sector >>  8) & 0xFF;
		command[4] = (sector >> 16) & 0xFF;

		command[5] = 0xE0 | ((sector >> 24) & 0x0F);
		command[6] = 0x20;

		// send the setup + command
		result = usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
					       0, 0x20, 0, 1, command, 7);
		if (result != USB_STOR_XFER_GOOD)
			goto leave;

		// read the result
		result = jumpshot_bulk_read(us, buffer, len);
		if (result != USB_STOR_XFER_GOOD)
			goto leave;

		usb_stor_dbg(us, "%d bytes\n", len);

		// Store the data in the transfer buffer
		usb_stor_access_xfer_buf(buffer, len, us->srb,
				 &sg, &sg_offset, TO_XFER_BUF);

		sector += thistime;
		totallen -= len;
	} while (totallen > 0);

	kfree(buffer);
	return USB_STOR_TRANSPORT_GOOD;

 leave:
	kfree(buffer);
	return USB_STOR_TRANSPORT_ERROR;
}


static int jumpshot_write_data(struct us_data *us,
			       struct jumpshot_info *info,
			       u32 sector,
			       u32 sectors)
{
	unsigned char *command = us->iobuf;
	unsigned char *buffer;
	unsigned char  thistime;
	unsigned int totallen, alloclen;
	int len, result, waitcount;
	unsigned int sg_offset = 0;
	struct scatterlist *sg = NULL;

	// we're working in LBA mode.  according to the ATA spec, 
	// we can support up to 28-bit addressing.  I don't know if Jumpshot
	// supports beyond 24-bit addressing.  It's kind of hard to test 
	// since it requires > 8GB CF card.
	//
	if (sector > 0x0FFFFFFF)
		return USB_STOR_TRANSPORT_ERROR;

	totallen = sectors * info->ssize;

	// Since we don't write more than 64 KB at a time, we have to create
	// a bounce buffer and move the data a piece at a time between the
	// bounce buffer and the actual transfer buffer.

	alloclen = min(totallen, 65536u);
	buffer = kmalloc(alloclen, GFP_NOIO);
	if (buffer == NULL)
		return USB_STOR_TRANSPORT_ERROR;

	do {
		// loop, never allocate or transfer more than 64k at once
		// (min(128k, 255*info->ssize) is the real limit)

		len = min(totallen, alloclen);
		thistime = (len / info->ssize) & 0xff;

		// Get the data from the transfer buffer
		usb_stor_access_xfer_buf(buffer, len, us->srb,
				&sg, &sg_offset, FROM_XFER_BUF);

		command[0] = 0;
		command[1] = thistime;
		command[2] = sector & 0xFF;
		command[3] = (sector >>  8) & 0xFF;
		command[4] = (sector >> 16) & 0xFF;

		command[5] = 0xE0 | ((sector >> 24) & 0x0F);
		command[6] = 0x30;

		// send the setup + command
		result = usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
			0, 0x20, 0, 1, command, 7);
		if (result != USB_STOR_XFER_GOOD)
			goto leave;

		// send the data
		result = jumpshot_bulk_write(us, buffer, len);
		if (result != USB_STOR_XFER_GOOD)
			goto leave;

		// read the result.  apparently the bulk write can complete
		// before the jumpshot drive is finished writing.  so we loop
		// here until we get a good return code
		waitcount = 0;
		do {
			result = jumpshot_get_status(us);
			if (result != USB_STOR_TRANSPORT_GOOD) {
				// I have not experimented to find the smallest value.
				//
				msleep(50); 
			}
		} while ((result != USB_STOR_TRANSPORT_GOOD) && (waitcount < 10));

		if (result != USB_STOR_TRANSPORT_GOOD)
			usb_stor_dbg(us, "Gah!  Waitcount = 10.  Bad write!?\n");

		sector += thistime;
		totallen -= len;
	} while (totallen > 0);

	kfree(buffer);
	return result;

 leave:
	kfree(buffer);
	return USB_STOR_TRANSPORT_ERROR;
}

static int jumpshot_id_device(struct us_data *us,
			      struct jumpshot_info *info)
{
	unsigned char *command = us->iobuf;
	unsigned char *reply;
	int 	 rc;

	if (!info)
		return USB_STOR_TRANSPORT_ERROR;

	command[0] = 0xE0;
	command[1] = 0xEC;
	reply = kmalloc(512, GFP_NOIO);
	if (!reply)
		return USB_STOR_TRANSPORT_ERROR;

	// send the setup
	rc = usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
				   0, 0x20, 0, 6, command, 2);

	if (rc != USB_STOR_XFER_GOOD) {
		usb_stor_dbg(us, "Gah! send_control for read_capacity failed\n");
		rc = USB_STOR_TRANSPORT_ERROR;
		goto leave;
	}

	// read the reply
	rc = jumpshot_bulk_read(us, reply, 512);
	if (rc != USB_STOR_XFER_GOOD) {
		rc = USB_STOR_TRANSPORT_ERROR;
		goto leave;
	}

	info->sectors = ((u32)(reply[117]) << 24) |
			((u32)(reply[116]) << 16) |
			((u32)(reply[115]) <<  8) |
			((u32)(reply[114])      );

	rc = USB_STOR_TRANSPORT_GOOD;

 leave:
	kfree(reply);
	return rc;
}

static int jumpshot_handle_mode_sense(struct us_data *us,
				      struct scsi_cmnd * srb, 
				      int sense_6)
{
	static unsigned char rw_err_page[12] = {
		0x1, 0xA, 0x21, 1, 0, 0, 0, 0, 1, 0, 0, 0
	};
	static unsigned char cache_page[12] = {
		0x8, 0xA, 0x1, 0, 0, 0, 0, 0, 0, 0, 0, 0
	};
	static unsigned char rbac_page[12] = {
		0x1B, 0xA, 0, 0x81, 0, 0, 0, 0, 0, 0, 0, 0
	};
	static unsigned char timer_page[8] = {
		0x1C, 0x6, 0, 0, 0, 0
	};
	unsigned char pc, page_code;
	unsigned int i = 0;
	struct jumpshot_info *info = (struct jumpshot_info *) (us->extra);
	unsigned char *ptr = us->iobuf;

	pc = srb->cmnd[2] >> 6;
	page_code = srb->cmnd[2] & 0x3F;

	switch (pc) {
	   case 0x0:
		   usb_stor_dbg(us, "Current values\n");
		   break;
	   case 0x1:
		   usb_stor_dbg(us, "Changeable values\n");
		   break;
	   case 0x2:
		   usb_stor_dbg(us, "Default values\n");
		   break;
	   case 0x3:
		   usb_stor_dbg(us, "Saves values\n");
		   break;
	}

	memset(ptr, 0, 8);
	if (sense_6) {
		ptr[2] = 0x00;		// WP enable: 0x80
		i = 4;
	} else {
		ptr[3] = 0x00;		// WP enable: 0x80
		i = 8;
	}

	switch (page_code) {
	   case 0x0:
		// vendor-specific mode
		info->sense_key = 0x05;
		info->sense_asc = 0x24;
		info->sense_ascq = 0x00;
		return USB_STOR_TRANSPORT_FAILED;

	   case 0x1:
		memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
		i += sizeof(rw_err_page);
		break;

	   case 0x8:
		memcpy(ptr + i, cache_page, sizeof(cache_page));
		i += sizeof(cache_page);
		break;

	   case 0x1B:
		memcpy(ptr + i, rbac_page, sizeof(rbac_page));
		i += sizeof(rbac_page);
		break;

	   case 0x1C:
		memcpy(ptr + i, timer_page, sizeof(timer_page));
		i += sizeof(timer_page);
		break;

	   case 0x3F:
		memcpy(ptr + i, timer_page, sizeof(timer_page));
		i += sizeof(timer_page);
		memcpy(ptr + i, rbac_page, sizeof(rbac_page));
		i += sizeof(rbac_page);
		memcpy(ptr + i, cache_page, sizeof(cache_page));
		i += sizeof(cache_page);
		memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
		i += sizeof(rw_err_page);
		break;
	}

	if (sense_6)
		ptr[0] = i - 1;
	else
		((__be16 *) ptr)[0] = cpu_to_be16(i - 2);
	usb_stor_set_xfer_buf(ptr, i, srb);

	return USB_STOR_TRANSPORT_GOOD;
}


static void jumpshot_info_destructor(void *extra)
{
	// this routine is a placeholder...
	// currently, we don't allocate any extra blocks so we're okay
}


// Transport for the Lexar 'Jumpshot'
//
static int jumpshot_transport(struct scsi_cmnd *srb, struct us_data *us)
{
	struct jumpshot_info *info;
	int rc;
	unsigned long block, blocks;
	unsigned char *ptr = us->iobuf;
	static unsigned char inquiry_response[8] = {
		0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00
	};

	if (!us->extra) {
		us->extra = kzalloc(sizeof(struct jumpshot_info), GFP_NOIO);
		if (!us->extra)
			return USB_STOR_TRANSPORT_ERROR;

		us->extra_destructor = jumpshot_info_destructor;
	}

	info = (struct jumpshot_info *) (us->extra);

	if (srb->cmnd[0] == INQUIRY) {
		usb_stor_dbg(us, "INQUIRY - Returning bogus response\n");
		memcpy(ptr, inquiry_response, sizeof(inquiry_response));
		fill_inquiry_response(us, ptr, 36);
		return USB_STOR_TRANSPORT_GOOD;
	}

	if (srb->cmnd[0] == READ_CAPACITY) {
		info->ssize = 0x200;  // hard coded 512 byte sectors as per ATA spec

		rc = jumpshot_get_status(us);
		if (rc != USB_STOR_TRANSPORT_GOOD)
			return rc;

		rc = jumpshot_id_device(us, info);
		if (rc != USB_STOR_TRANSPORT_GOOD)
			return rc;

		usb_stor_dbg(us, "READ_CAPACITY:  %ld sectors, %ld bytes per sector\n",
			     info->sectors, info->ssize);

		// build the reply
		//
		((__be32 *) ptr)[0] = cpu_to_be32(info->sectors - 1);
		((__be32 *) ptr)[1] = cpu_to_be32(info->ssize);
		usb_stor_set_xfer_buf(ptr, 8, srb);

		return USB_STOR_TRANSPORT_GOOD;
	}

	if (srb->cmnd[0] == MODE_SELECT_10) {
		usb_stor_dbg(us, "Gah! MODE_SELECT_10\n");
		return USB_STOR_TRANSPORT_ERROR;
	}

	if (srb->cmnd[0] == READ_10) {
		block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
			((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));

		blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));

		usb_stor_dbg(us, "READ_10: read block 0x%04lx  count %ld\n",
			     block, blocks);
		return jumpshot_read_data(us, info, block, blocks);
	}

	if (srb->cmnd[0] == READ_12) {
		// I don't think we'll ever see a READ_12 but support it anyway...
		//
		block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
			((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));

		blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
			 ((u32)(srb->cmnd[8]) <<  8) | ((u32)(srb->cmnd[9]));

		usb_stor_dbg(us, "READ_12: read block 0x%04lx  count %ld\n",
			     block, blocks);
		return jumpshot_read_data(us, info, block, blocks);
	}

	if (srb->cmnd[0] == WRITE_10) {
		block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
			((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));

		blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));

		usb_stor_dbg(us, "WRITE_10: write block 0x%04lx  count %ld\n",
			     block, blocks);
		return jumpshot_write_data(us, info, block, blocks);
	}

	if (srb->cmnd[0] == WRITE_12) {
		// I don't think we'll ever see a WRITE_12 but support it anyway...
		//
		block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
			((u32)(srb->cmnd[4]) <<  8) | ((u32)(srb->cmnd[5]));

		blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
			 ((u32)(srb->cmnd[8]) <<  8) | ((u32)(srb->cmnd[9]));

		usb_stor_dbg(us, "WRITE_12: write block 0x%04lx  count %ld\n",
			     block, blocks);
		return jumpshot_write_data(us, info, block, blocks);
	}


	if (srb->cmnd[0] == TEST_UNIT_READY) {
		usb_stor_dbg(us, "TEST_UNIT_READY\n");
		return jumpshot_get_status(us);
	}

	if (srb->cmnd[0] == REQUEST_SENSE) {
		usb_stor_dbg(us, "REQUEST_SENSE\n");

		memset(ptr, 0, 18);
		ptr[0] = 0xF0;
		ptr[2] = info->sense_key;
		ptr[7] = 11;
		ptr[12] = info->sense_asc;
		ptr[13] = info->sense_ascq;
		usb_stor_set_xfer_buf(ptr, 18, srb);

		return USB_STOR_TRANSPORT_GOOD;
	}

	if (srb->cmnd[0] == MODE_SENSE) {
		usb_stor_dbg(us, "MODE_SENSE_6 detected\n");
		return jumpshot_handle_mode_sense(us, srb, 1);
	}

	if (srb->cmnd[0] == MODE_SENSE_10) {
		usb_stor_dbg(us, "MODE_SENSE_10 detected\n");
		return jumpshot_handle_mode_sense(us, srb, 0);
	}

	if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
		/*
		 * sure.  whatever.  not like we can stop the user from popping
		 * the media out of the device (no locking doors, etc)
		 */
		return USB_STOR_TRANSPORT_GOOD;
	}

	if (srb->cmnd[0] == START_STOP) {
		/*
		 * this is used by sd.c'check_scsidisk_media_change to detect
		 * media change
		 */
		usb_stor_dbg(us, "START_STOP\n");
		/*
		 * the first jumpshot_id_device after a media change returns
		 * an error (determined experimentally)
		 */
		rc = jumpshot_id_device(us, info);
		if (rc == USB_STOR_TRANSPORT_GOOD) {
			info->sense_key = NO_SENSE;
			srb->result = SUCCESS;
		} else {
			info->sense_key = UNIT_ATTENTION;
			srb->result = SAM_STAT_CHECK_CONDITION;
		}
		return rc;
	}

	usb_stor_dbg(us, "Gah! Unknown command: %d (0x%x)\n",
		     srb->cmnd[0], srb->cmnd[0]);
	info->sense_key = 0x05;
	info->sense_asc = 0x20;
	info->sense_ascq = 0x00;
	return USB_STOR_TRANSPORT_FAILED;
}

static struct scsi_host_template jumpshot_host_template;

static int jumpshot_probe(struct usb_interface *intf,
			 const struct usb_device_id *id)
{
	struct us_data *us;
	int result;

	result = usb_stor_probe1(&us, intf, id,
			(id - jumpshot_usb_ids) + jumpshot_unusual_dev_list,
			&jumpshot_host_template);
	if (result)
		return result;

	us->transport_name  = "Lexar Jumpshot Control/Bulk";
	us->transport = jumpshot_transport;
	us->transport_reset = usb_stor_Bulk_reset;
	us->max_lun = 1;

	result = usb_stor_probe2(us);
	return result;
}

static struct usb_driver jumpshot_driver = {
	.name =		DRV_NAME,
	.probe =	jumpshot_probe,
	.disconnect =	usb_stor_disconnect,
	.suspend =	usb_stor_suspend,
	.resume =	usb_stor_resume,
	.reset_resume =	usb_stor_reset_resume,
	.pre_reset =	usb_stor_pre_reset,
	.post_reset =	usb_stor_post_reset,
	.id_table =	jumpshot_usb_ids,
	.soft_unbind =	1,
	.no_dynamic_id = 1,
};

module_usb_stor_driver(jumpshot_driver, jumpshot_host_template, DRV_NAME);
Commit	Line	Data
f0183a33 FB	1	/*
f0183a33 FB	2	* Driver for Lexar "Jumpshot" Compact Flash reader
1da177e4 LT	3	*
	4	* jumpshot driver v0.1:
	5	*
	6	* First release
	7	*
	8	* Current development and maintenance by:
	9	* (c) 2000 Jimmie Mayfield (mayfield+usb@sackheads.org)
	10	*
	11	* Many thanks to Robert Baruch for the SanDisk SmartMedia reader driver
	12	* which I used as a template for this driver.
	13	*
	14	* Some bugfixes and scatter-gather code by Gregory P. Smith
	15	* (greg-usb@electricrain.com)
	16	*
	17	* Fix for media change by Joerg Schneider (js@joergschneider.com)
	18	*
	19	* Developed with the assistance of:
	20	*
	21	* (C) 2002 Alan Stern <stern@rowland.org>
	22	*
	23	* This program is free software; you can redistribute it and/or modify it
	24	* under the terms of the GNU General Public License as published by the
	25	* Free Software Foundation; either version 2, or (at your option) any
	26	* later version.
	27	*
	28	* This program is distributed in the hope that it will be useful, but
	29	* WITHOUT ANY WARRANTY; without even the implied warranty of
	30	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	31	* General Public License for more details.
	32	*
	33	* You should have received a copy of the GNU General Public License along
	34	* with this program; if not, write to the Free Software Foundation, Inc.,
	35	* 675 Mass Ave, Cambridge, MA 02139, USA.
	36	*/
	37
	38	/*
	39	* This driver attempts to support the Lexar Jumpshot USB CompactFlash
	40	* reader. Like many other USB CompactFlash readers, the Jumpshot contains
	41	* a USB-to-ATA chip.
	42	*
	43	* This driver supports reading and writing. If you're truly paranoid,
	44	* however, you can force the driver into a write-protected state by setting
	45	* the WP enable bits in jumpshot_handle_mode_sense. See the comments
	46	* in that routine.
	47	*/
	48
1da177e4	49	#include <linux/errno.h>
a9fb6d05	50	#include <linux/module.h>
1da177e4 LT	51	#include <linux/slab.h>
	52
	53	#include <scsi/scsi.h>
	54	#include <scsi/scsi_cmnd.h>
	55
	56	#include "usb.h"
	57	#include "transport.h"
	58	#include "protocol.h"
	59	#include "debug.h"
aa519be3	60	#include "scsiglue.h"
1da177e4	61
aa519be3	62	#define DRV_NAME "ums-jumpshot"
1da177e4	63
4246b06a MG	64	MODULE_DESCRIPTION("Driver for Lexar \"Jumpshot\" Compact Flash reader");
	65	MODULE_AUTHOR("Jimmie Mayfield <mayfield+usb@sackheads.org>");
	66	MODULE_LICENSE("GPL");
	67
a9fb6d05 AS	68	/*
	69	* The table of devices
	70	*/
	71	#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
	72	vendorName, productName, useProtocol, useTransport, \
	73	initFunction, flags) \
	74	{ USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
f61870ee	75	.driver_info = (flags) }
a9fb6d05	76
9d35214b	77	static struct usb_device_id jumpshot_usb_ids[] = {
a9fb6d05 AS	78	# include "unusual_jumpshot.h"
	79	{ } /* Terminating entry */
	80	};
	81	MODULE_DEVICE_TABLE(usb, jumpshot_usb_ids);
	82
	83	#undef UNUSUAL_DEV
	84
	85	/*
	86	* The flags table
	87	*/
	88	#define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
	89	vendor_name, product_name, use_protocol, use_transport, \
	90	init_function, Flags) \
	91	{ \
	92	.vendorName = vendor_name, \
	93	.productName = product_name, \
	94	.useProtocol = use_protocol, \
	95	.useTransport = use_transport, \
	96	.initFunction = init_function, \
	97	}
	98
	99	static struct us_unusual_dev jumpshot_unusual_dev_list[] = {
	100	# include "unusual_jumpshot.h"
	101	{ } /* Terminating entry */
	102	};
	103
	104	#undef UNUSUAL_DEV
	105
	106
	107	struct jumpshot_info {
	108	unsigned long sectors; /* total sector count */
	109	unsigned long ssize; /* sector size in bytes */
	110
	111	/* the following aren't used yet */
	112	unsigned char sense_key;
	113	unsigned long sense_asc; /* additional sense code */
	114	unsigned long sense_ascq; /* additional sense code qualifier */
	115	};
	116
1da177e4 LT	117	static inline int jumpshot_bulk_read(struct us_data *us,
	118	unsigned char *data,
	119	unsigned int len)
	120	{
	121	if (len == 0)
	122	return USB_STOR_XFER_GOOD;
	123
191648d0	124	usb_stor_dbg(us, "len = %d\n", len);
1da177e4 LT	125	return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
	126	data, len, NULL);
	127	}
	128
	129
	130	static inline int jumpshot_bulk_write(struct us_data *us,
	131	unsigned char *data,
	132	unsigned int len)
	133	{
	134	if (len == 0)
	135	return USB_STOR_XFER_GOOD;
	136
191648d0	137	usb_stor_dbg(us, "len = %d\n", len);
1da177e4 LT	138	return usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
	139	data, len, NULL);
	140	}
	141
	142
	143	static int jumpshot_get_status(struct us_data *us)
	144	{
	145	int rc;
	146
	147	if (!us)
	148	return USB_STOR_TRANSPORT_ERROR;
	149
	150	// send the setup
	151	rc = usb_stor_ctrl_transfer(us, us->recv_ctrl_pipe,
	152	0, 0xA0, 0, 7, us->iobuf, 1);
	153
	154	if (rc != USB_STOR_XFER_GOOD)
	155	return USB_STOR_TRANSPORT_ERROR;
	156
	157	if (us->iobuf[0] != 0x50) {
191648d0	158	usb_stor_dbg(us, "0x%2x\n", us->iobuf[0]);
1da177e4 LT	159	return USB_STOR_TRANSPORT_ERROR;
	160	}
	161
	162	return USB_STOR_TRANSPORT_GOOD;
	163	}
	164
	165	static int jumpshot_read_data(struct us_data *us,
	166	struct jumpshot_info *info,
	167	u32 sector,
	168	u32 sectors)
	169	{
	170	unsigned char *command = us->iobuf;
	171	unsigned char *buffer;
	172	unsigned char thistime;
	173	unsigned int totallen, alloclen;
	174	int len, result;
1f6f31a0 JA	175	unsigned int sg_offset = 0;
1f6f31a0 JA	176	struct scatterlist *sg = NULL;
1da177e4 LT	177
	178	// we're working in LBA mode. according to the ATA spec,
	179	// we can support up to 28-bit addressing. I don't know if Jumpshot
	180	// supports beyond 24-bit addressing. It's kind of hard to test
	181	// since it requires > 8GB CF card.
	182
	183	if (sector > 0x0FFFFFFF)
	184	return USB_STOR_TRANSPORT_ERROR;
	185
	186	totallen = sectors * info->ssize;
	187
	188	// Since we don't read more than 64 KB at a time, we have to create
	189	// a bounce buffer and move the data a piece at a time between the
	190	// bounce buffer and the actual transfer buffer.
	191
	192	alloclen = min(totallen, 65536u);
	193	buffer = kmalloc(alloclen, GFP_NOIO);
	194	if (buffer == NULL)
	195	return USB_STOR_TRANSPORT_ERROR;
	196
	197	do {
	198	// loop, never allocate or transfer more than 64k at once
	199	// (min(128k, 255*info->ssize) is the real limit)
	200	len = min(totallen, alloclen);
	201	thistime = (len / info->ssize) & 0xff;
	202
	203	command[0] = 0;
	204	command[1] = thistime;
	205	command[2] = sector & 0xFF;
	206	command[3] = (sector >> 8) & 0xFF;
	207	command[4] = (sector >> 16) & 0xFF;
	208
	209	command[5] = 0xE0 \| ((sector >> 24) & 0x0F);
	210	command[6] = 0x20;
	211
	212	// send the setup + command
	213	result = usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
	214	0, 0x20, 0, 1, command, 7);
	215	if (result != USB_STOR_XFER_GOOD)
	216	goto leave;
	217
	218	// read the result
	219	result = jumpshot_bulk_read(us, buffer, len);
	220	if (result != USB_STOR_XFER_GOOD)
	221	goto leave;
	222
191648d0	223	usb_stor_dbg(us, "%d bytes\n", len);
1da177e4 LT	224
	225	// Store the data in the transfer buffer
	226	usb_stor_access_xfer_buf(buffer, len, us->srb,
1f6f31a0	227	&sg, &sg_offset, TO_XFER_BUF);
1da177e4 LT	228
	229	sector += thistime;
	230	totallen -= len;
	231	} while (totallen > 0);
	232
	233	kfree(buffer);
	234	return USB_STOR_TRANSPORT_GOOD;
	235
	236	leave:
	237	kfree(buffer);
	238	return USB_STOR_TRANSPORT_ERROR;
	239	}
	240
	241
	242	static int jumpshot_write_data(struct us_data *us,
	243	struct jumpshot_info *info,
	244	u32 sector,
	245	u32 sectors)
	246	{
	247	unsigned char *command = us->iobuf;
	248	unsigned char *buffer;
	249	unsigned char thistime;
	250	unsigned int totallen, alloclen;
	251	int len, result, waitcount;
1f6f31a0 JA	252	unsigned int sg_offset = 0;
1f6f31a0 JA	253	struct scatterlist *sg = NULL;
1da177e4 LT	254
	255	// we're working in LBA mode. according to the ATA spec,
	256	// we can support up to 28-bit addressing. I don't know if Jumpshot
	257	// supports beyond 24-bit addressing. It's kind of hard to test
	258	// since it requires > 8GB CF card.
	259	//
	260	if (sector > 0x0FFFFFFF)
	261	return USB_STOR_TRANSPORT_ERROR;
	262
	263	totallen = sectors * info->ssize;
	264
	265	// Since we don't write more than 64 KB at a time, we have to create
	266	// a bounce buffer and move the data a piece at a time between the
	267	// bounce buffer and the actual transfer buffer.
	268
	269	alloclen = min(totallen, 65536u);
	270	buffer = kmalloc(alloclen, GFP_NOIO);
	271	if (buffer == NULL)
	272	return USB_STOR_TRANSPORT_ERROR;
	273
	274	do {
	275	// loop, never allocate or transfer more than 64k at once
	276	// (min(128k, 255*info->ssize) is the real limit)
	277
	278	len = min(totallen, alloclen);
	279	thistime = (len / info->ssize) & 0xff;
	280
	281	// Get the data from the transfer buffer
	282	usb_stor_access_xfer_buf(buffer, len, us->srb,
1f6f31a0	283	&sg, &sg_offset, FROM_XFER_BUF);
1da177e4 LT	284
	285	command[0] = 0;
	286	command[1] = thistime;
	287	command[2] = sector & 0xFF;
	288	command[3] = (sector >> 8) & 0xFF;
	289	command[4] = (sector >> 16) & 0xFF;
	290
	291	command[5] = 0xE0 \| ((sector >> 24) & 0x0F);
	292	command[6] = 0x30;
	293
	294	// send the setup + command
	295	result = usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
	296	0, 0x20, 0, 1, command, 7);
	297	if (result != USB_STOR_XFER_GOOD)
	298	goto leave;
	299
	300	// send the data
	301	result = jumpshot_bulk_write(us, buffer, len);
	302	if (result != USB_STOR_XFER_GOOD)
	303	goto leave;
	304
	305	// read the result. apparently the bulk write can complete
	306	// before the jumpshot drive is finished writing. so we loop
	307	// here until we get a good return code
	308	waitcount = 0;
	309	do {
	310	result = jumpshot_get_status(us);
	311	if (result != USB_STOR_TRANSPORT_GOOD) {
	312	// I have not experimented to find the smallest value.
	313	//
	314	msleep(50);
	315	}
	316	} while ((result != USB_STOR_TRANSPORT_GOOD) && (waitcount < 10));
	317
	318	if (result != USB_STOR_TRANSPORT_GOOD)
191648d0	319	usb_stor_dbg(us, "Gah! Waitcount = 10. Bad write!?\n");
1da177e4 LT	320
	321	sector += thistime;
	322	totallen -= len;
	323	} while (totallen > 0);
	324
	325	kfree(buffer);
	326	return result;
	327
	328	leave:
	329	kfree(buffer);
	330	return USB_STOR_TRANSPORT_ERROR;
	331	}
	332
	333	static int jumpshot_id_device(struct us_data *us,
	334	struct jumpshot_info *info)
	335	{
	336	unsigned char *command = us->iobuf;
	337	unsigned char *reply;
	338	int rc;
	339
64aebe73	340	if (!info)
1da177e4 LT	341	return USB_STOR_TRANSPORT_ERROR;
	342
	343	command[0] = 0xE0;
	344	command[1] = 0xEC;
	345	reply = kmalloc(512, GFP_NOIO);
	346	if (!reply)
	347	return USB_STOR_TRANSPORT_ERROR;
	348
	349	// send the setup
	350	rc = usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
	351	0, 0x20, 0, 6, command, 2);
	352
	353	if (rc != USB_STOR_XFER_GOOD) {
191648d0	354	usb_stor_dbg(us, "Gah! send_control for read_capacity failed\n");
1da177e4 LT	355	rc = USB_STOR_TRANSPORT_ERROR;
	356	goto leave;
	357	}
	358
	359	// read the reply
	360	rc = jumpshot_bulk_read(us, reply, 512);
	361	if (rc != USB_STOR_XFER_GOOD) {
	362	rc = USB_STOR_TRANSPORT_ERROR;
	363	goto leave;
	364	}
	365
	366	info->sectors = ((u32)(reply[117]) << 24) \|
	367	((u32)(reply[116]) << 16) \|
	368	((u32)(reply[115]) << 8) \|
	369	((u32)(reply[114]) );
	370
	371	rc = USB_STOR_TRANSPORT_GOOD;
	372
	373	leave:
	374	kfree(reply);
	375	return rc;
	376	}
	377
	378	static int jumpshot_handle_mode_sense(struct us_data *us,
	379	struct scsi_cmnd * srb,
	380	int sense_6)
	381	{
	382	static unsigned char rw_err_page[12] = {
	383	0x1, 0xA, 0x21, 1, 0, 0, 0, 0, 1, 0, 0, 0
	384	};
	385	static unsigned char cache_page[12] = {
	386	0x8, 0xA, 0x1, 0, 0, 0, 0, 0, 0, 0, 0, 0
	387	};
	388	static unsigned char rbac_page[12] = {
	389	0x1B, 0xA, 0, 0x81, 0, 0, 0, 0, 0, 0, 0, 0
	390	};
	391	static unsigned char timer_page[8] = {
	392	0x1C, 0x6, 0, 0, 0, 0
	393	};
	394	unsigned char pc, page_code;
	395	unsigned int i = 0;
	396	struct jumpshot_info info = (struct jumpshot_info ) (us->extra);
	397	unsigned char *ptr = us->iobuf;
	398
	399	pc = srb->cmnd[2] >> 6;
	400	page_code = srb->cmnd[2] & 0x3F;
	401
	402	switch (pc) {
	403	case 0x0:
191648d0 JP	404	usb_stor_dbg(us, "Current values\n");
191648d0 JP	405	break;
1da177e4	406	case 0x1:
191648d0 JP	407	usb_stor_dbg(us, "Changeable values\n");
191648d0 JP	408	break;
1da177e4	409	case 0x2:
191648d0 JP	410	usb_stor_dbg(us, "Default values\n");
191648d0 JP	411	break;
1da177e4	412	case 0x3:
191648d0 JP	413	usb_stor_dbg(us, "Saves values\n");
191648d0 JP	414	break;
1da177e4 LT	415	}
	416
	417	memset(ptr, 0, 8);
	418	if (sense_6) {
	419	ptr[2] = 0x00; // WP enable: 0x80
	420	i = 4;
	421	} else {
	422	ptr[3] = 0x00; // WP enable: 0x80
	423	i = 8;
	424	}
	425
	426	switch (page_code) {
	427	case 0x0:
	428	// vendor-specific mode
	429	info->sense_key = 0x05;
	430	info->sense_asc = 0x24;
	431	info->sense_ascq = 0x00;
	432	return USB_STOR_TRANSPORT_FAILED;
	433
	434	case 0x1:
	435	memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
	436	i += sizeof(rw_err_page);
	437	break;
	438
	439	case 0x8:
	440	memcpy(ptr + i, cache_page, sizeof(cache_page));
	441	i += sizeof(cache_page);
	442	break;
	443
	444	case 0x1B:
	445	memcpy(ptr + i, rbac_page, sizeof(rbac_page));
	446	i += sizeof(rbac_page);
	447	break;
	448
	449	case 0x1C:
	450	memcpy(ptr + i, timer_page, sizeof(timer_page));
	451	i += sizeof(timer_page);
	452	break;
	453
	454	case 0x3F:
	455	memcpy(ptr + i, timer_page, sizeof(timer_page));
	456	i += sizeof(timer_page);
	457	memcpy(ptr + i, rbac_page, sizeof(rbac_page));
	458	i += sizeof(rbac_page);
	459	memcpy(ptr + i, cache_page, sizeof(cache_page));
	460	i += sizeof(cache_page);
	461	memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
	462	i += sizeof(rw_err_page);
	463	break;
	464	}
	465
	466	if (sense_6)
	467	ptr[0] = i - 1;
	468	else
	469	((__be16 *) ptr)[0] = cpu_to_be16(i - 2);
	470	usb_stor_set_xfer_buf(ptr, i, srb);
	471
	472	return USB_STOR_TRANSPORT_GOOD;
	473	}
	474
	475
	476	static void jumpshot_info_destructor(void *extra)
	477	{
	478	// this routine is a placeholder...
479	// currently, we don't allocate any extra blocks so we're okay
480	}
481
482
483
484	// Transport for the Lexar 'Jumpshot'
485	//
a9fb6d05	486	static int jumpshot_transport(struct scsi_cmnd srb, struct us_data us)
1da177e4 LT	487	{
	488	struct jumpshot_info *info;
	489	int rc;
	490	unsigned long block, blocks;
	491	unsigned char *ptr = us->iobuf;
	492	static unsigned char inquiry_response[8] = {
	493	0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00
	494	};
	495
	496	if (!us->extra) {
887c2560	497	us->extra = kzalloc(sizeof(struct jumpshot_info), GFP_NOIO);
191648d0	498	if (!us->extra)
1da177e4	499	return USB_STOR_TRANSPORT_ERROR;
191648d0	500
1da177e4 LT	501	us->extra_destructor = jumpshot_info_destructor;
	502	}
	503
	504	info = (struct jumpshot_info *) (us->extra);
	505
	506	if (srb->cmnd[0] == INQUIRY) {
191648d0	507	usb_stor_dbg(us, "INQUIRY - Returning bogus response\n");
1da177e4 LT	508	memcpy(ptr, inquiry_response, sizeof(inquiry_response));
	509	fill_inquiry_response(us, ptr, 36);
	510	return USB_STOR_TRANSPORT_GOOD;
	511	}
	512
	513	if (srb->cmnd[0] == READ_CAPACITY) {
	514	info->ssize = 0x200; // hard coded 512 byte sectors as per ATA spec
	515
	516	rc = jumpshot_get_status(us);
	517	if (rc != USB_STOR_TRANSPORT_GOOD)
	518	return rc;
	519
	520	rc = jumpshot_id_device(us, info);
	521	if (rc != USB_STOR_TRANSPORT_GOOD)
	522	return rc;
	523
191648d0 JP	524	usb_stor_dbg(us, "READ_CAPACITY: %ld sectors, %ld bytes per sector\n",
191648d0 JP	525	info->sectors, info->ssize);
1da177e4 LT	526
	527	// build the reply
	528	//
	529	((__be32 *) ptr)[0] = cpu_to_be32(info->sectors - 1);
	530	((__be32 *) ptr)[1] = cpu_to_be32(info->ssize);
	531	usb_stor_set_xfer_buf(ptr, 8, srb);
	532
	533	return USB_STOR_TRANSPORT_GOOD;
	534	}
	535
	536	if (srb->cmnd[0] == MODE_SELECT_10) {
191648d0	537	usb_stor_dbg(us, "Gah! MODE_SELECT_10\n");
1da177e4 LT	538	return USB_STOR_TRANSPORT_ERROR;
	539	}
	540
	541	if (srb->cmnd[0] == READ_10) {
	542	block = ((u32)(srb->cmnd[2]) << 24) \| ((u32)(srb->cmnd[3]) << 16) \|
	543	((u32)(srb->cmnd[4]) << 8) \| ((u32)(srb->cmnd[5]));
	544
	545	blocks = ((u32)(srb->cmnd[7]) << 8) \| ((u32)(srb->cmnd[8]));
	546
191648d0 JP	547	usb_stor_dbg(us, "READ_10: read block 0x%04lx count %ld\n",
191648d0 JP	548	block, blocks);
1da177e4 LT	549	return jumpshot_read_data(us, info, block, blocks);
	550	}
	551
	552	if (srb->cmnd[0] == READ_12) {
	553	// I don't think we'll ever see a READ_12 but support it anyway...
	554	//
	555	block = ((u32)(srb->cmnd[2]) << 24) \| ((u32)(srb->cmnd[3]) << 16) \|
	556	((u32)(srb->cmnd[4]) << 8) \| ((u32)(srb->cmnd[5]));
	557
	558	blocks = ((u32)(srb->cmnd[6]) << 24) \| ((u32)(srb->cmnd[7]) << 16) \|
	559	((u32)(srb->cmnd[8]) << 8) \| ((u32)(srb->cmnd[9]));
	560
191648d0 JP	561	usb_stor_dbg(us, "READ_12: read block 0x%04lx count %ld\n",
191648d0 JP	562	block, blocks);
1da177e4 LT	563	return jumpshot_read_data(us, info, block, blocks);
	564	}
	565
	566	if (srb->cmnd[0] == WRITE_10) {
	567	block = ((u32)(srb->cmnd[2]) << 24) \| ((u32)(srb->cmnd[3]) << 16) \|
	568	((u32)(srb->cmnd[4]) << 8) \| ((u32)(srb->cmnd[5]));
	569
	570	blocks = ((u32)(srb->cmnd[7]) << 8) \| ((u32)(srb->cmnd[8]));
	571
191648d0 JP	572	usb_stor_dbg(us, "WRITE_10: write block 0x%04lx count %ld\n",
191648d0 JP	573	block, blocks);
1da177e4 LT	574	return jumpshot_write_data(us, info, block, blocks);
	575	}
	576
	577	if (srb->cmnd[0] == WRITE_12) {
	578	// I don't think we'll ever see a WRITE_12 but support it anyway...
	579	//
	580	block = ((u32)(srb->cmnd[2]) << 24) \| ((u32)(srb->cmnd[3]) << 16) \|
	581	((u32)(srb->cmnd[4]) << 8) \| ((u32)(srb->cmnd[5]));
	582
	583	blocks = ((u32)(srb->cmnd[6]) << 24) \| ((u32)(srb->cmnd[7]) << 16) \|
	584	((u32)(srb->cmnd[8]) << 8) \| ((u32)(srb->cmnd[9]));
	585
191648d0 JP	586	usb_stor_dbg(us, "WRITE_12: write block 0x%04lx count %ld\n",
191648d0 JP	587	block, blocks);
1da177e4 LT	588	return jumpshot_write_data(us, info, block, blocks);
	589	}
	590
	591
	592	if (srb->cmnd[0] == TEST_UNIT_READY) {
191648d0	593	usb_stor_dbg(us, "TEST_UNIT_READY\n");
1da177e4 LT	594	return jumpshot_get_status(us);
	595	}
	596
	597	if (srb->cmnd[0] == REQUEST_SENSE) {
191648d0	598	usb_stor_dbg(us, "REQUEST_SENSE\n");
1da177e4 LT	599
	600	memset(ptr, 0, 18);
	601	ptr[0] = 0xF0;
	602	ptr[2] = info->sense_key;
	603	ptr[7] = 11;
	604	ptr[12] = info->sense_asc;
	605	ptr[13] = info->sense_ascq;
	606	usb_stor_set_xfer_buf(ptr, 18, srb);
	607
	608	return USB_STOR_TRANSPORT_GOOD;
	609	}
	610
	611	if (srb->cmnd[0] == MODE_SENSE) {
191648d0	612	usb_stor_dbg(us, "MODE_SENSE_6 detected\n");
1da177e4 LT	613	return jumpshot_handle_mode_sense(us, srb, 1);
	614	}
	615
	616	if (srb->cmnd[0] == MODE_SENSE_10) {
191648d0	617	usb_stor_dbg(us, "MODE_SENSE_10 detected\n");
1da177e4 LT	618	return jumpshot_handle_mode_sense(us, srb, 0);
	619	}
	620
	621	if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
f0183a33 FB	622	/*
	623	* sure. whatever. not like we can stop the user from popping
	624	* the media out of the device (no locking doors, etc)
	625	*/
1da177e4 LT	626	return USB_STOR_TRANSPORT_GOOD;
	627	}
	628
	629	if (srb->cmnd[0] == START_STOP) {
f0183a33 FB	630	/*
	631	* this is used by sd.c'check_scsidisk_media_change to detect
	632	* media change
	633	*/
191648d0	634	usb_stor_dbg(us, "START_STOP\n");
f0183a33 FB	635	/*
	636	* the first jumpshot_id_device after a media change returns
	637	* an error (determined experimentally)
	638	*/
1da177e4 LT	639	rc = jumpshot_id_device(us, info);
	640	if (rc == USB_STOR_TRANSPORT_GOOD) {
	641	info->sense_key = NO_SENSE;
	642	srb->result = SUCCESS;
	643	} else {
	644	info->sense_key = UNIT_ATTENTION;
	645	srb->result = SAM_STAT_CHECK_CONDITION;
	646	}
	647	return rc;
	648	}
	649
191648d0 JP	650	usb_stor_dbg(us, "Gah! Unknown command: %d (0x%x)\n",
191648d0 JP	651	srb->cmnd[0], srb->cmnd[0]);
1da177e4 LT	652	info->sense_key = 0x05;
	653	info->sense_asc = 0x20;
	654	info->sense_ascq = 0x00;
	655	return USB_STOR_TRANSPORT_FAILED;
	656	}
a9fb6d05	657
aa519be3 AM	658	static struct scsi_host_template jumpshot_host_template;
aa519be3 AM	659
a9fb6d05 AS	660	static int jumpshot_probe(struct usb_interface *intf,
	661	const struct usb_device_id *id)
	662	{
	663	struct us_data *us;
	664	int result;
	665
	666	result = usb_stor_probe1(&us, intf, id,
aa519be3 AM	667	(id - jumpshot_usb_ids) + jumpshot_unusual_dev_list,
aa519be3 AM	668	&jumpshot_host_template);
a9fb6d05 AS	669	if (result)
	670	return result;
	671
	672	us->transport_name = "Lexar Jumpshot Control/Bulk";
	673	us->transport = jumpshot_transport;
	674	us->transport_reset = usb_stor_Bulk_reset;
	675	us->max_lun = 1;
	676
	677	result = usb_stor_probe2(us);
	678	return result;
	679	}
	680
	681	static struct usb_driver jumpshot_driver = {
aa519be3	682	.name = DRV_NAME,
a9fb6d05 AS	683	.probe = jumpshot_probe,
	684	.disconnect = usb_stor_disconnect,
	685	.suspend = usb_stor_suspend,
	686	.resume = usb_stor_resume,
	687	.reset_resume = usb_stor_reset_resume,
	688	.pre_reset = usb_stor_pre_reset,
	689	.post_reset = usb_stor_post_reset,
	690	.id_table = jumpshot_usb_ids,
	691	.soft_unbind = 1,
e73b2db6	692	.no_dynamic_id = 1,
a9fb6d05 AS	693	};
a9fb6d05 AS	694
aa519be3	695	module_usb_stor_driver(jumpshot_driver, jumpshot_host_template, DRV_NAME);