u-boot/common/usb_storage.c
Sascha Silbe ff8fef5666 Fix block device accesses beyond 2TiB
With CONFIG_SYS_64BIT_LBA, lbaint_t gets defined as a 64-bit type,
which is required to represent block numbers for storage devices that
exceed 2TiB (the block size usually is 512B), e.g. recent hard drives.

For some obscure reason, the current U-Boot code uses lbaint_t for the
number of blocks to read (a rather optimistic estimation of how RAM
sizes will evolve), but not for the starting address. Trying to access
blocks beyond the 2TiB boundary will simply wrap around and read a
block within the 0..2TiB range.

We now use lbaint_t for block start addresses, too. This required
changes to all block drivers as the signature of block_read(),
block_write() and block_erase() in block_dev_desc_t changed.

Signed-off-by: Sascha Silbe <t-uboot@infra-silbe.de>
2013-06-26 10:26:06 -04:00

1433 lines
39 KiB
C

/*
* Most of this source has been derived from the Linux USB
* project:
* (c) 1999-2002 Matthew Dharm (mdharm-usb@one-eyed-alien.net)
* (c) 2000 David L. Brown, Jr. (usb-storage@davidb.org)
* (c) 1999 Michael Gee (michael@linuxspecific.com)
* (c) 2000 Yggdrasil Computing, Inc.
*
*
* Adapted for U-Boot:
* (C) Copyright 2001 Denis Peter, MPL AG Switzerland
*
* For BBB support (C) Copyright 2003
* Gary Jennejohn, DENX Software Engineering <garyj@denx.de>
*
* BBB support based on /sys/dev/usb/umass.c from
* FreeBSD.
*
* See file CREDITS for list of people who contributed to this
* project.
*
* 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 of
* the License, 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., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*/
/* Note:
* Currently only the CBI transport protocoll has been implemented, and it
* is only tested with a TEAC USB Floppy. Other Massstorages with CBI or CB
* transport protocoll may work as well.
*/
/*
* New Note:
* Support for USB Mass Storage Devices (BBB) has been added. It has
* only been tested with USB memory sticks.
*/
#include <common.h>
#include <command.h>
#include <asm/byteorder.h>
#include <asm/processor.h>
#include <part.h>
#include <usb.h>
#undef BBB_COMDAT_TRACE
#undef BBB_XPORT_TRACE
#include <scsi.h>
/* direction table -- this indicates the direction of the data
* transfer for each command code -- a 1 indicates input
*/
static const unsigned char us_direction[256/8] = {
0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77,
0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
#define US_DIRECTION(x) ((us_direction[x>>3] >> (x & 7)) & 1)
static ccb usb_ccb __attribute__((aligned(ARCH_DMA_MINALIGN)));
/*
* CBI style
*/
#define US_CBI_ADSC 0
/*
* BULK only
*/
#define US_BBB_RESET 0xff
#define US_BBB_GET_MAX_LUN 0xfe
/* Command Block Wrapper */
typedef struct {
__u32 dCBWSignature;
# define CBWSIGNATURE 0x43425355
__u32 dCBWTag;
__u32 dCBWDataTransferLength;
__u8 bCBWFlags;
# define CBWFLAGS_OUT 0x00
# define CBWFLAGS_IN 0x80
__u8 bCBWLUN;
__u8 bCDBLength;
# define CBWCDBLENGTH 16
__u8 CBWCDB[CBWCDBLENGTH];
} umass_bbb_cbw_t;
#define UMASS_BBB_CBW_SIZE 31
static __u32 CBWTag;
/* Command Status Wrapper */
typedef struct {
__u32 dCSWSignature;
# define CSWSIGNATURE 0x53425355
__u32 dCSWTag;
__u32 dCSWDataResidue;
__u8 bCSWStatus;
# define CSWSTATUS_GOOD 0x0
# define CSWSTATUS_FAILED 0x1
# define CSWSTATUS_PHASE 0x2
} umass_bbb_csw_t;
#define UMASS_BBB_CSW_SIZE 13
#define USB_MAX_STOR_DEV 5
static int usb_max_devs; /* number of highest available usb device */
static block_dev_desc_t usb_dev_desc[USB_MAX_STOR_DEV];
struct us_data;
typedef int (*trans_cmnd)(ccb *cb, struct us_data *data);
typedef int (*trans_reset)(struct us_data *data);
struct us_data {
struct usb_device *pusb_dev; /* this usb_device */
unsigned int flags; /* from filter initially */
# define USB_READY (1 << 0)
unsigned char ifnum; /* interface number */
unsigned char ep_in; /* in endpoint */
unsigned char ep_out; /* out ....... */
unsigned char ep_int; /* interrupt . */
unsigned char subclass; /* as in overview */
unsigned char protocol; /* .............. */
unsigned char attention_done; /* force attn on first cmd */
unsigned short ip_data; /* interrupt data */
int action; /* what to do */
int ip_wanted; /* needed */
int *irq_handle; /* for USB int requests */
unsigned int irqpipe; /* pipe for release_irq */
unsigned char irqmaxp; /* max packed for irq Pipe */
unsigned char irqinterval; /* Intervall for IRQ Pipe */
ccb *srb; /* current srb */
trans_reset transport_reset; /* reset routine */
trans_cmnd transport; /* transport routine */
};
#ifdef CONFIG_USB_EHCI
/*
* The U-Boot EHCI driver can handle any transfer length as long as there is
* enough free heap space left, but the SCSI READ(10) and WRITE(10) commands are
* limited to 65535 blocks.
*/
#define USB_MAX_XFER_BLK 65535
#else
#define USB_MAX_XFER_BLK 20
#endif
static struct us_data usb_stor[USB_MAX_STOR_DEV];
#define USB_STOR_TRANSPORT_GOOD 0
#define USB_STOR_TRANSPORT_FAILED -1
#define USB_STOR_TRANSPORT_ERROR -2
int usb_stor_get_info(struct usb_device *dev, struct us_data *us,
block_dev_desc_t *dev_desc);
int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,
struct us_data *ss);
unsigned long usb_stor_read(int device, lbaint_t blknr,
lbaint_t blkcnt, void *buffer);
unsigned long usb_stor_write(int device, lbaint_t blknr,
lbaint_t blkcnt, const void *buffer);
struct usb_device * usb_get_dev_index(int index);
void uhci_show_temp_int_td(void);
#ifdef CONFIG_PARTITIONS
block_dev_desc_t *usb_stor_get_dev(int index)
{
return (index < usb_max_devs) ? &usb_dev_desc[index] : NULL;
}
#endif
static void usb_show_progress(void)
{
debug(".");
}
/*******************************************************************************
* show info on storage devices; 'usb start/init' must be invoked earlier
* as we only retrieve structures populated during devices initialization
*/
int usb_stor_info(void)
{
int i;
if (usb_max_devs > 0) {
for (i = 0; i < usb_max_devs; i++) {
printf(" Device %d: ", i);
dev_print(&usb_dev_desc[i]);
}
return 0;
}
printf("No storage devices, perhaps not 'usb start'ed..?\n");
return 1;
}
static unsigned int usb_get_max_lun(struct us_data *us)
{
int len;
ALLOC_CACHE_ALIGN_BUFFER(unsigned char, result, 1);
len = usb_control_msg(us->pusb_dev,
usb_rcvctrlpipe(us->pusb_dev, 0),
US_BBB_GET_MAX_LUN,
USB_TYPE_CLASS | USB_RECIP_INTERFACE | USB_DIR_IN,
0, us->ifnum,
result, sizeof(char),
USB_CNTL_TIMEOUT * 5);
debug("Get Max LUN -> len = %i, result = %i\n", len, (int) *result);
return (len > 0) ? *result : 0;
}
/*******************************************************************************
* scan the usb and reports device info
* to the user if mode = 1
* returns current device or -1 if no
*/
int usb_stor_scan(int mode)
{
unsigned char i;
struct usb_device *dev;
if (mode == 1)
printf(" scanning usb for storage devices... ");
usb_disable_asynch(1); /* asynch transfer not allowed */
for (i = 0; i < USB_MAX_STOR_DEV; i++) {
memset(&usb_dev_desc[i], 0, sizeof(block_dev_desc_t));
usb_dev_desc[i].if_type = IF_TYPE_USB;
usb_dev_desc[i].dev = i;
usb_dev_desc[i].part_type = PART_TYPE_UNKNOWN;
usb_dev_desc[i].target = 0xff;
usb_dev_desc[i].type = DEV_TYPE_UNKNOWN;
usb_dev_desc[i].block_read = usb_stor_read;
usb_dev_desc[i].block_write = usb_stor_write;
}
usb_max_devs = 0;
for (i = 0; i < USB_MAX_DEVICE; i++) {
dev = usb_get_dev_index(i); /* get device */
debug("i=%d\n", i);
if (dev == NULL)
break; /* no more devices available */
if (usb_storage_probe(dev, 0, &usb_stor[usb_max_devs])) {
/* OK, it's a storage device. Iterate over its LUNs
* and populate `usb_dev_desc'.
*/
int lun, max_lun, start = usb_max_devs;
max_lun = usb_get_max_lun(&usb_stor[usb_max_devs]);
for (lun = 0;
lun <= max_lun && usb_max_devs < USB_MAX_STOR_DEV;
lun++) {
usb_dev_desc[usb_max_devs].lun = lun;
if (usb_stor_get_info(dev, &usb_stor[start],
&usb_dev_desc[usb_max_devs]) == 1) {
usb_max_devs++;
}
}
}
/* if storage device */
if (usb_max_devs == USB_MAX_STOR_DEV) {
printf("max USB Storage Device reached: %d stopping\n",
usb_max_devs);
break;
}
} /* for */
usb_disable_asynch(0); /* asynch transfer allowed */
printf("%d Storage Device(s) found\n", usb_max_devs);
if (usb_max_devs > 0)
return 0;
return -1;
}
static int usb_stor_irq(struct usb_device *dev)
{
struct us_data *us;
us = (struct us_data *)dev->privptr;
if (us->ip_wanted)
us->ip_wanted = 0;
return 0;
}
#ifdef DEBUG
static void usb_show_srb(ccb *pccb)
{
int i;
printf("SRB: len %d datalen 0x%lX\n ", pccb->cmdlen, pccb->datalen);
for (i = 0; i < 12; i++)
printf("%02X ", pccb->cmd[i]);
printf("\n");
}
static void display_int_status(unsigned long tmp)
{
printf("Status: %s %s %s %s %s %s %s\n",
(tmp & USB_ST_ACTIVE) ? "Active" : "",
(tmp & USB_ST_STALLED) ? "Stalled" : "",
(tmp & USB_ST_BUF_ERR) ? "Buffer Error" : "",
(tmp & USB_ST_BABBLE_DET) ? "Babble Det" : "",
(tmp & USB_ST_NAK_REC) ? "NAKed" : "",
(tmp & USB_ST_CRC_ERR) ? "CRC Error" : "",
(tmp & USB_ST_BIT_ERR) ? "Bitstuff Error" : "");
}
#endif
/***********************************************************************
* Data transfer routines
***********************************************************************/
static int us_one_transfer(struct us_data *us, int pipe, char *buf, int length)
{
int max_size;
int this_xfer;
int result;
int partial;
int maxtry;
int stat;
/* determine the maximum packet size for these transfers */
max_size = usb_maxpacket(us->pusb_dev, pipe) * 16;
/* while we have data left to transfer */
while (length) {
/* calculate how long this will be -- maximum or a remainder */
this_xfer = length > max_size ? max_size : length;
length -= this_xfer;
/* setup the retry counter */
maxtry = 10;
/* set up the transfer loop */
do {
/* transfer the data */
debug("Bulk xfer 0x%x(%d) try #%d\n",
(unsigned int)buf, this_xfer, 11 - maxtry);
result = usb_bulk_msg(us->pusb_dev, pipe, buf,
this_xfer, &partial,
USB_CNTL_TIMEOUT * 5);
debug("bulk_msg returned %d xferred %d/%d\n",
result, partial, this_xfer);
if (us->pusb_dev->status != 0) {
/* if we stall, we need to clear it before
* we go on
*/
#ifdef DEBUG
display_int_status(us->pusb_dev->status);
#endif
if (us->pusb_dev->status & USB_ST_STALLED) {
debug("stalled ->clearing endpoint" \
"halt for pipe 0x%x\n", pipe);
stat = us->pusb_dev->status;
usb_clear_halt(us->pusb_dev, pipe);
us->pusb_dev->status = stat;
if (this_xfer == partial) {
debug("bulk transferred" \
"with error %lX," \
" but data ok\n",
us->pusb_dev->status);
return 0;
}
else
return result;
}
if (us->pusb_dev->status & USB_ST_NAK_REC) {
debug("Device NAKed bulk_msg\n");
return result;
}
debug("bulk transferred with error");
if (this_xfer == partial) {
debug(" %ld, but data ok\n",
us->pusb_dev->status);
return 0;
}
/* if our try counter reaches 0, bail out */
debug(" %ld, data %d\n",
us->pusb_dev->status, partial);
if (!maxtry--)
return result;
}
/* update to show what data was transferred */
this_xfer -= partial;
buf += partial;
/* continue until this transfer is done */
} while (this_xfer);
}
/* if we get here, we're done and successful */
return 0;
}
static int usb_stor_BBB_reset(struct us_data *us)
{
int result;
unsigned int pipe;
/*
* Reset recovery (5.3.4 in Universal Serial Bus Mass Storage Class)
*
* For Reset Recovery the host shall issue in the following order:
* a) a Bulk-Only Mass Storage Reset
* b) a Clear Feature HALT to the Bulk-In endpoint
* c) a Clear Feature HALT to the Bulk-Out endpoint
*
* This is done in 3 steps.
*
* If the reset doesn't succeed, the device should be port reset.
*
* This comment stolen from FreeBSD's /sys/dev/usb/umass.c.
*/
debug("BBB_reset\n");
result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
US_BBB_RESET,
USB_TYPE_CLASS | USB_RECIP_INTERFACE,
0, us->ifnum, NULL, 0, USB_CNTL_TIMEOUT * 5);
if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
debug("RESET:stall\n");
return -1;
}
/* long wait for reset */
mdelay(150);
debug("BBB_reset result %d: status %lX reset\n",
result, us->pusb_dev->status);
pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
result = usb_clear_halt(us->pusb_dev, pipe);
/* long wait for reset */
mdelay(150);
debug("BBB_reset result %d: status %lX clearing IN endpoint\n",
result, us->pusb_dev->status);
/* long wait for reset */
pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
result = usb_clear_halt(us->pusb_dev, pipe);
mdelay(150);
debug("BBB_reset result %d: status %lX clearing OUT endpoint\n",
result, us->pusb_dev->status);
debug("BBB_reset done\n");
return 0;
}
/* FIXME: this reset function doesn't really reset the port, and it
* should. Actually it should probably do what it's doing here, and
* reset the port physically
*/
static int usb_stor_CB_reset(struct us_data *us)
{
unsigned char cmd[12];
int result;
debug("CB_reset\n");
memset(cmd, 0xff, sizeof(cmd));
cmd[0] = SCSI_SEND_DIAG;
cmd[1] = 4;
result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
US_CBI_ADSC,
USB_TYPE_CLASS | USB_RECIP_INTERFACE,
0, us->ifnum, cmd, sizeof(cmd),
USB_CNTL_TIMEOUT * 5);
/* long wait for reset */
mdelay(1500);
debug("CB_reset result %d: status %lX clearing endpoint halt\n",
result, us->pusb_dev->status);
usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_in));
usb_clear_halt(us->pusb_dev, usb_rcvbulkpipe(us->pusb_dev, us->ep_out));
debug("CB_reset done\n");
return 0;
}
/*
* Set up the command for a BBB device. Note that the actual SCSI
* command is copied into cbw.CBWCDB.
*/
static int usb_stor_BBB_comdat(ccb *srb, struct us_data *us)
{
int result;
int actlen;
int dir_in;
unsigned int pipe;
ALLOC_CACHE_ALIGN_BUFFER(umass_bbb_cbw_t, cbw, 1);
dir_in = US_DIRECTION(srb->cmd[0]);
#ifdef BBB_COMDAT_TRACE
printf("dir %d lun %d cmdlen %d cmd %p datalen %lu pdata %p\n",
dir_in, srb->lun, srb->cmdlen, srb->cmd, srb->datalen,
srb->pdata);
if (srb->cmdlen) {
for (result = 0; result < srb->cmdlen; result++)
printf("cmd[%d] %#x ", result, srb->cmd[result]);
printf("\n");
}
#endif
/* sanity checks */
if (!(srb->cmdlen <= CBWCDBLENGTH)) {
debug("usb_stor_BBB_comdat:cmdlen too large\n");
return -1;
}
/* always OUT to the ep */
pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
cbw->dCBWSignature = cpu_to_le32(CBWSIGNATURE);
cbw->dCBWTag = cpu_to_le32(CBWTag++);
cbw->dCBWDataTransferLength = cpu_to_le32(srb->datalen);
cbw->bCBWFlags = (dir_in ? CBWFLAGS_IN : CBWFLAGS_OUT);
cbw->bCBWLUN = srb->lun;
cbw->bCDBLength = srb->cmdlen;
/* copy the command data into the CBW command data buffer */
/* DST SRC LEN!!! */
memcpy(cbw->CBWCDB, srb->cmd, srb->cmdlen);
result = usb_bulk_msg(us->pusb_dev, pipe, cbw, UMASS_BBB_CBW_SIZE,
&actlen, USB_CNTL_TIMEOUT * 5);
if (result < 0)
debug("usb_stor_BBB_comdat:usb_bulk_msg error\n");
return result;
}
/* FIXME: we also need a CBI_command which sets up the completion
* interrupt, and waits for it
*/
static int usb_stor_CB_comdat(ccb *srb, struct us_data *us)
{
int result = 0;
int dir_in, retry;
unsigned int pipe;
unsigned long status;
retry = 5;
dir_in = US_DIRECTION(srb->cmd[0]);
if (dir_in)
pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
else
pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
while (retry--) {
debug("CBI gets a command: Try %d\n", 5 - retry);
#ifdef DEBUG
usb_show_srb(srb);
#endif
/* let's send the command via the control pipe */
result = usb_control_msg(us->pusb_dev,
usb_sndctrlpipe(us->pusb_dev , 0),
US_CBI_ADSC,
USB_TYPE_CLASS | USB_RECIP_INTERFACE,
0, us->ifnum,
srb->cmd, srb->cmdlen,
USB_CNTL_TIMEOUT * 5);
debug("CB_transport: control msg returned %d, status %lX\n",
result, us->pusb_dev->status);
/* check the return code for the command */
if (result < 0) {
if (us->pusb_dev->status & USB_ST_STALLED) {
status = us->pusb_dev->status;
debug(" stall during command found," \
" clear pipe\n");
usb_clear_halt(us->pusb_dev,
usb_sndctrlpipe(us->pusb_dev, 0));
us->pusb_dev->status = status;
}
debug(" error during command %02X" \
" Stat = %lX\n", srb->cmd[0],
us->pusb_dev->status);
return result;
}
/* transfer the data payload for this command, if one exists*/
debug("CB_transport: control msg returned %d," \
" direction is %s to go 0x%lx\n", result,
dir_in ? "IN" : "OUT", srb->datalen);
if (srb->datalen) {
result = us_one_transfer(us, pipe, (char *)srb->pdata,
srb->datalen);
debug("CBI attempted to transfer data," \
" result is %d status %lX, len %d\n",
result, us->pusb_dev->status,
us->pusb_dev->act_len);
if (!(us->pusb_dev->status & USB_ST_NAK_REC))
break;
} /* if (srb->datalen) */
else
break;
}
/* return result */
return result;
}
static int usb_stor_CBI_get_status(ccb *srb, struct us_data *us)
{
int timeout;
us->ip_wanted = 1;
submit_int_msg(us->pusb_dev, us->irqpipe,
(void *) &us->ip_data, us->irqmaxp, us->irqinterval);
timeout = 1000;
while (timeout--) {
if ((volatile int *) us->ip_wanted == NULL)
break;
mdelay(10);
}
if (us->ip_wanted) {
printf(" Did not get interrupt on CBI\n");
us->ip_wanted = 0;
return USB_STOR_TRANSPORT_ERROR;
}
debug("Got interrupt data 0x%x, transfered %d status 0x%lX\n",
us->ip_data, us->pusb_dev->irq_act_len,
us->pusb_dev->irq_status);
/* UFI gives us ASC and ASCQ, like a request sense */
if (us->subclass == US_SC_UFI) {
if (srb->cmd[0] == SCSI_REQ_SENSE ||
srb->cmd[0] == SCSI_INQUIRY)
return USB_STOR_TRANSPORT_GOOD; /* Good */
else if (us->ip_data)
return USB_STOR_TRANSPORT_FAILED;
else
return USB_STOR_TRANSPORT_GOOD;
}
/* otherwise, we interpret the data normally */
switch (us->ip_data) {
case 0x0001:
return USB_STOR_TRANSPORT_GOOD;
case 0x0002:
return USB_STOR_TRANSPORT_FAILED;
default:
return USB_STOR_TRANSPORT_ERROR;
} /* switch */
return USB_STOR_TRANSPORT_ERROR;
}
#define USB_TRANSPORT_UNKNOWN_RETRY 5
#define USB_TRANSPORT_NOT_READY_RETRY 10
/* clear a stall on an endpoint - special for BBB devices */
static int usb_stor_BBB_clear_endpt_stall(struct us_data *us, __u8 endpt)
{
int result;
/* ENDPOINT_HALT = 0, so set value to 0 */
result = usb_control_msg(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev, 0),
USB_REQ_CLEAR_FEATURE, USB_RECIP_ENDPOINT,
0, endpt, NULL, 0, USB_CNTL_TIMEOUT * 5);
return result;
}
static int usb_stor_BBB_transport(ccb *srb, struct us_data *us)
{
int result, retry;
int dir_in;
int actlen, data_actlen;
unsigned int pipe, pipein, pipeout;
ALLOC_CACHE_ALIGN_BUFFER(umass_bbb_csw_t, csw, 1);
#ifdef BBB_XPORT_TRACE
unsigned char *ptr;
int index;
#endif
dir_in = US_DIRECTION(srb->cmd[0]);
/* COMMAND phase */
debug("COMMAND phase\n");
result = usb_stor_BBB_comdat(srb, us);
if (result < 0) {
debug("failed to send CBW status %ld\n",
us->pusb_dev->status);
usb_stor_BBB_reset(us);
return USB_STOR_TRANSPORT_FAILED;
}
if (!(us->flags & USB_READY))
mdelay(5);
pipein = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
pipeout = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
/* DATA phase + error handling */
data_actlen = 0;
/* no data, go immediately to the STATUS phase */
if (srb->datalen == 0)
goto st;
debug("DATA phase\n");
if (dir_in)
pipe = pipein;
else
pipe = pipeout;
result = usb_bulk_msg(us->pusb_dev, pipe, srb->pdata, srb->datalen,
&data_actlen, USB_CNTL_TIMEOUT * 5);
/* special handling of STALL in DATA phase */
if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
debug("DATA:stall\n");
/* clear the STALL on the endpoint */
result = usb_stor_BBB_clear_endpt_stall(us,
dir_in ? us->ep_in : us->ep_out);
if (result >= 0)
/* continue on to STATUS phase */
goto st;
}
if (result < 0) {
debug("usb_bulk_msg error status %ld\n",
us->pusb_dev->status);
usb_stor_BBB_reset(us);
return USB_STOR_TRANSPORT_FAILED;
}
#ifdef BBB_XPORT_TRACE
for (index = 0; index < data_actlen; index++)
printf("pdata[%d] %#x ", index, srb->pdata[index]);
printf("\n");
#endif
/* STATUS phase + error handling */
st:
retry = 0;
again:
debug("STATUS phase\n");
result = usb_bulk_msg(us->pusb_dev, pipein, csw, UMASS_BBB_CSW_SIZE,
&actlen, USB_CNTL_TIMEOUT*5);
/* special handling of STALL in STATUS phase */
if ((result < 0) && (retry < 1) &&
(us->pusb_dev->status & USB_ST_STALLED)) {
debug("STATUS:stall\n");
/* clear the STALL on the endpoint */
result = usb_stor_BBB_clear_endpt_stall(us, us->ep_in);
if (result >= 0 && (retry++ < 1))
/* do a retry */
goto again;
}
if (result < 0) {
debug("usb_bulk_msg error status %ld\n",
us->pusb_dev->status);
usb_stor_BBB_reset(us);
return USB_STOR_TRANSPORT_FAILED;
}
#ifdef BBB_XPORT_TRACE
ptr = (unsigned char *)csw;
for (index = 0; index < UMASS_BBB_CSW_SIZE; index++)
printf("ptr[%d] %#x ", index, ptr[index]);
printf("\n");
#endif
/* misuse pipe to get the residue */
pipe = le32_to_cpu(csw->dCSWDataResidue);
if (pipe == 0 && srb->datalen != 0 && srb->datalen - data_actlen != 0)
pipe = srb->datalen - data_actlen;
if (CSWSIGNATURE != le32_to_cpu(csw->dCSWSignature)) {
debug("!CSWSIGNATURE\n");
usb_stor_BBB_reset(us);
return USB_STOR_TRANSPORT_FAILED;
} else if ((CBWTag - 1) != le32_to_cpu(csw->dCSWTag)) {
debug("!Tag\n");
usb_stor_BBB_reset(us);
return USB_STOR_TRANSPORT_FAILED;
} else if (csw->bCSWStatus > CSWSTATUS_PHASE) {
debug(">PHASE\n");
usb_stor_BBB_reset(us);
return USB_STOR_TRANSPORT_FAILED;
} else if (csw->bCSWStatus == CSWSTATUS_PHASE) {
debug("=PHASE\n");
usb_stor_BBB_reset(us);
return USB_STOR_TRANSPORT_FAILED;
} else if (data_actlen > srb->datalen) {
debug("transferred %dB instead of %ldB\n",
data_actlen, srb->datalen);
return USB_STOR_TRANSPORT_FAILED;
} else if (csw->bCSWStatus == CSWSTATUS_FAILED) {
debug("FAILED\n");
return USB_STOR_TRANSPORT_FAILED;
}
return result;
}
static int usb_stor_CB_transport(ccb *srb, struct us_data *us)
{
int result, status;
ccb *psrb;
ccb reqsrb;
int retry, notready;
psrb = &reqsrb;
status = USB_STOR_TRANSPORT_GOOD;
retry = 0;
notready = 0;
/* issue the command */
do_retry:
result = usb_stor_CB_comdat(srb, us);
debug("command / Data returned %d, status %lX\n",
result, us->pusb_dev->status);
/* if this is an CBI Protocol, get IRQ */
if (us->protocol == US_PR_CBI) {
status = usb_stor_CBI_get_status(srb, us);
/* if the status is error, report it */
if (status == USB_STOR_TRANSPORT_ERROR) {
debug(" USB CBI Command Error\n");
return status;
}
srb->sense_buf[12] = (unsigned char)(us->ip_data >> 8);
srb->sense_buf[13] = (unsigned char)(us->ip_data & 0xff);
if (!us->ip_data) {
/* if the status is good, report it */
if (status == USB_STOR_TRANSPORT_GOOD) {
debug(" USB CBI Command Good\n");
return status;
}
}
}
/* do we have to issue an auto request? */
/* HERE we have to check the result */
if ((result < 0) && !(us->pusb_dev->status & USB_ST_STALLED)) {
debug("ERROR %lX\n", us->pusb_dev->status);
us->transport_reset(us);
return USB_STOR_TRANSPORT_ERROR;
}
if ((us->protocol == US_PR_CBI) &&
((srb->cmd[0] == SCSI_REQ_SENSE) ||
(srb->cmd[0] == SCSI_INQUIRY))) {
/* do not issue an autorequest after request sense */
debug("No auto request and good\n");
return USB_STOR_TRANSPORT_GOOD;
}
/* issue an request_sense */
memset(&psrb->cmd[0], 0, 12);
psrb->cmd[0] = SCSI_REQ_SENSE;
psrb->cmd[1] = srb->lun << 5;
psrb->cmd[4] = 18;
psrb->datalen = 18;
psrb->pdata = &srb->sense_buf[0];
psrb->cmdlen = 12;
/* issue the command */
result = usb_stor_CB_comdat(psrb, us);
debug("auto request returned %d\n", result);
/* if this is an CBI Protocol, get IRQ */
if (us->protocol == US_PR_CBI)
status = usb_stor_CBI_get_status(psrb, us);
if ((result < 0) && !(us->pusb_dev->status & USB_ST_STALLED)) {
debug(" AUTO REQUEST ERROR %ld\n",
us->pusb_dev->status);
return USB_STOR_TRANSPORT_ERROR;
}
debug("autorequest returned 0x%02X 0x%02X 0x%02X 0x%02X\n",
srb->sense_buf[0], srb->sense_buf[2],
srb->sense_buf[12], srb->sense_buf[13]);
/* Check the auto request result */
if ((srb->sense_buf[2] == 0) &&
(srb->sense_buf[12] == 0) &&
(srb->sense_buf[13] == 0)) {
/* ok, no sense */
return USB_STOR_TRANSPORT_GOOD;
}
/* Check the auto request result */
switch (srb->sense_buf[2]) {
case 0x01:
/* Recovered Error */
return USB_STOR_TRANSPORT_GOOD;
break;
case 0x02:
/* Not Ready */
if (notready++ > USB_TRANSPORT_NOT_READY_RETRY) {
printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X"
" 0x%02X (NOT READY)\n", srb->cmd[0],
srb->sense_buf[0], srb->sense_buf[2],
srb->sense_buf[12], srb->sense_buf[13]);
return USB_STOR_TRANSPORT_FAILED;
} else {
mdelay(100);
goto do_retry;
}
break;
default:
if (retry++ > USB_TRANSPORT_UNKNOWN_RETRY) {
printf("cmd 0x%02X returned 0x%02X 0x%02X 0x%02X"
" 0x%02X\n", srb->cmd[0], srb->sense_buf[0],
srb->sense_buf[2], srb->sense_buf[12],
srb->sense_buf[13]);
return USB_STOR_TRANSPORT_FAILED;
} else
goto do_retry;
break;
}
return USB_STOR_TRANSPORT_FAILED;
}
static int usb_inquiry(ccb *srb, struct us_data *ss)
{
int retry, i;
retry = 5;
do {
memset(&srb->cmd[0], 0, 12);
srb->cmd[0] = SCSI_INQUIRY;
srb->cmd[1] = srb->lun << 5;
srb->cmd[4] = 36;
srb->datalen = 36;
srb->cmdlen = 12;
i = ss->transport(srb, ss);
debug("inquiry returns %d\n", i);
if (i == 0)
break;
} while (--retry);
if (!retry) {
printf("error in inquiry\n");
return -1;
}
return 0;
}
static int usb_request_sense(ccb *srb, struct us_data *ss)
{
char *ptr;
ptr = (char *)srb->pdata;
memset(&srb->cmd[0], 0, 12);
srb->cmd[0] = SCSI_REQ_SENSE;
srb->cmd[1] = srb->lun << 5;
srb->cmd[4] = 18;
srb->datalen = 18;
srb->pdata = &srb->sense_buf[0];
srb->cmdlen = 12;
ss->transport(srb, ss);
debug("Request Sense returned %02X %02X %02X\n",
srb->sense_buf[2], srb->sense_buf[12],
srb->sense_buf[13]);
srb->pdata = (uchar *)ptr;
return 0;
}
static int usb_test_unit_ready(ccb *srb, struct us_data *ss)
{
int retries = 10;
do {
memset(&srb->cmd[0], 0, 12);
srb->cmd[0] = SCSI_TST_U_RDY;
srb->cmd[1] = srb->lun << 5;
srb->datalen = 0;
srb->cmdlen = 12;
if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD) {
ss->flags |= USB_READY;
return 0;
}
usb_request_sense(srb, ss);
/*
* Check the Key Code Qualifier, if it matches
* "Not Ready - medium not present"
* (the sense Key equals 0x2 and the ASC is 0x3a)
* return immediately as the medium being absent won't change
* unless there is a user action.
*/
if ((srb->sense_buf[2] == 0x02) &&
(srb->sense_buf[12] == 0x3a))
return -1;
mdelay(100);
} while (retries--);
return -1;
}
static int usb_read_capacity(ccb *srb, struct us_data *ss)
{
int retry;
/* XXX retries */
retry = 3;
do {
memset(&srb->cmd[0], 0, 12);
srb->cmd[0] = SCSI_RD_CAPAC;
srb->cmd[1] = srb->lun << 5;
srb->datalen = 8;
srb->cmdlen = 12;
if (ss->transport(srb, ss) == USB_STOR_TRANSPORT_GOOD)
return 0;
} while (retry--);
return -1;
}
static int usb_read_10(ccb *srb, struct us_data *ss, unsigned long start,
unsigned short blocks)
{
memset(&srb->cmd[0], 0, 12);
srb->cmd[0] = SCSI_READ10;
srb->cmd[1] = srb->lun << 5;
srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff;
srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff;
srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff;
srb->cmd[5] = ((unsigned char) (start)) & 0xff;
srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff;
srb->cmd[8] = (unsigned char) blocks & 0xff;
srb->cmdlen = 12;
debug("read10: start %lx blocks %x\n", start, blocks);
return ss->transport(srb, ss);
}
static int usb_write_10(ccb *srb, struct us_data *ss, unsigned long start,
unsigned short blocks)
{
memset(&srb->cmd[0], 0, 12);
srb->cmd[0] = SCSI_WRITE10;
srb->cmd[1] = srb->lun << 5;
srb->cmd[2] = ((unsigned char) (start >> 24)) & 0xff;
srb->cmd[3] = ((unsigned char) (start >> 16)) & 0xff;
srb->cmd[4] = ((unsigned char) (start >> 8)) & 0xff;
srb->cmd[5] = ((unsigned char) (start)) & 0xff;
srb->cmd[7] = ((unsigned char) (blocks >> 8)) & 0xff;
srb->cmd[8] = (unsigned char) blocks & 0xff;
srb->cmdlen = 12;
debug("write10: start %lx blocks %x\n", start, blocks);
return ss->transport(srb, ss);
}
#ifdef CONFIG_USB_BIN_FIXUP
/*
* Some USB storage devices queried for SCSI identification data respond with
* binary strings, which if output to the console freeze the terminal. The
* workaround is to modify the vendor and product strings read from such
* device with proper values (as reported by 'usb info').
*
* Vendor and product length limits are taken from the definition of
* block_dev_desc_t in include/part.h.
*/
static void usb_bin_fixup(struct usb_device_descriptor descriptor,
unsigned char vendor[],
unsigned char product[]) {
const unsigned char max_vendor_len = 40;
const unsigned char max_product_len = 20;
if (descriptor.idVendor == 0x0424 && descriptor.idProduct == 0x223a) {
strncpy((char *)vendor, "SMSC", max_vendor_len);
strncpy((char *)product, "Flash Media Cntrller",
max_product_len);
}
}
#endif /* CONFIG_USB_BIN_FIXUP */
unsigned long usb_stor_read(int device, lbaint_t blknr,
lbaint_t blkcnt, void *buffer)
{
lbaint_t start, blks;
uintptr_t buf_addr;
unsigned short smallblks;
struct usb_device *dev;
struct us_data *ss;
int retry, i;
ccb *srb = &usb_ccb;
if (blkcnt == 0)
return 0;
device &= 0xff;
/* Setup device */
debug("\nusb_read: dev %d \n", device);
dev = NULL;
for (i = 0; i < USB_MAX_DEVICE; i++) {
dev = usb_get_dev_index(i);
if (dev == NULL)
return 0;
if (dev->devnum == usb_dev_desc[device].target)
break;
}
ss = (struct us_data *)dev->privptr;
usb_disable_asynch(1); /* asynch transfer not allowed */
srb->lun = usb_dev_desc[device].lun;
buf_addr = (unsigned long)buffer;
start = blknr;
blks = blkcnt;
debug("\nusb_read: dev %d startblk " LBAF ", blccnt " LBAF
" buffer %lx\n", device, start, blks, buf_addr);
do {
/* XXX need some comment here */
retry = 2;
srb->pdata = (unsigned char *)buf_addr;
if (blks > USB_MAX_XFER_BLK)
smallblks = USB_MAX_XFER_BLK;
else
smallblks = (unsigned short) blks;
retry_it:
if (smallblks == USB_MAX_XFER_BLK)
usb_show_progress();
srb->datalen = usb_dev_desc[device].blksz * smallblks;
srb->pdata = (unsigned char *)buf_addr;
if (usb_read_10(srb, ss, start, smallblks)) {
debug("Read ERROR\n");
usb_request_sense(srb, ss);
if (retry--)
goto retry_it;
blkcnt -= blks;
break;
}
start += smallblks;
blks -= smallblks;
buf_addr += srb->datalen;
} while (blks != 0);
ss->flags &= ~USB_READY;
debug("usb_read: end startblk " LBAF
", blccnt %x buffer %lx\n",
start, smallblks, buf_addr);
usb_disable_asynch(0); /* asynch transfer allowed */
if (blkcnt >= USB_MAX_XFER_BLK)
debug("\n");
return blkcnt;
}
unsigned long usb_stor_write(int device, lbaint_t blknr,
lbaint_t blkcnt, const void *buffer)
{
lbaint_t start, blks;
uintptr_t buf_addr;
unsigned short smallblks;
struct usb_device *dev;
struct us_data *ss;
int retry, i;
ccb *srb = &usb_ccb;
if (blkcnt == 0)
return 0;
device &= 0xff;
/* Setup device */
debug("\nusb_write: dev %d \n", device);
dev = NULL;
for (i = 0; i < USB_MAX_DEVICE; i++) {
dev = usb_get_dev_index(i);
if (dev == NULL)
return 0;
if (dev->devnum == usb_dev_desc[device].target)
break;
}
ss = (struct us_data *)dev->privptr;
usb_disable_asynch(1); /* asynch transfer not allowed */
srb->lun = usb_dev_desc[device].lun;
buf_addr = (unsigned long)buffer;
start = blknr;
blks = blkcnt;
debug("\nusb_write: dev %d startblk " LBAF ", blccnt " LBAF
" buffer %lx\n", device, start, blks, buf_addr);
do {
/* If write fails retry for max retry count else
* return with number of blocks written successfully.
*/
retry = 2;
srb->pdata = (unsigned char *)buf_addr;
if (blks > USB_MAX_XFER_BLK)
smallblks = USB_MAX_XFER_BLK;
else
smallblks = (unsigned short) blks;
retry_it:
if (smallblks == USB_MAX_XFER_BLK)
usb_show_progress();
srb->datalen = usb_dev_desc[device].blksz * smallblks;
srb->pdata = (unsigned char *)buf_addr;
if (usb_write_10(srb, ss, start, smallblks)) {
debug("Write ERROR\n");
usb_request_sense(srb, ss);
if (retry--)
goto retry_it;
blkcnt -= blks;
break;
}
start += smallblks;
blks -= smallblks;
buf_addr += srb->datalen;
} while (blks != 0);
ss->flags &= ~USB_READY;
debug("usb_write: end startblk " LBAF ", blccnt %x buffer %lx\n",
start, smallblks, buf_addr);
usb_disable_asynch(0); /* asynch transfer allowed */
if (blkcnt >= USB_MAX_XFER_BLK)
debug("\n");
return blkcnt;
}
/* Probe to see if a new device is actually a Storage device */
int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,
struct us_data *ss)
{
struct usb_interface *iface;
int i;
struct usb_endpoint_descriptor *ep_desc;
unsigned int flags = 0;
int protocol = 0;
int subclass = 0;
/* let's examine the device now */
iface = &dev->config.if_desc[ifnum];
#if 0
/* this is the place to patch some storage devices */
debug("iVendor %X iProduct %X\n", dev->descriptor.idVendor,
dev->descriptor.idProduct);
if ((dev->descriptor.idVendor) == 0x066b &&
(dev->descriptor.idProduct) == 0x0103) {
debug("patched for E-USB\n");
protocol = US_PR_CB;
subclass = US_SC_UFI; /* an assumption */
}
#endif
if (dev->descriptor.bDeviceClass != 0 ||
iface->desc.bInterfaceClass != USB_CLASS_MASS_STORAGE ||
iface->desc.bInterfaceSubClass < US_SC_MIN ||
iface->desc.bInterfaceSubClass > US_SC_MAX) {
/* if it's not a mass storage, we go no further */
return 0;
}
memset(ss, 0, sizeof(struct us_data));
/* At this point, we know we've got a live one */
debug("\n\nUSB Mass Storage device detected\n");
/* Initialize the us_data structure with some useful info */
ss->flags = flags;
ss->ifnum = ifnum;
ss->pusb_dev = dev;
ss->attention_done = 0;
/* If the device has subclass and protocol, then use that. Otherwise,
* take data from the specific interface.
*/
if (subclass) {
ss->subclass = subclass;
ss->protocol = protocol;
} else {
ss->subclass = iface->desc.bInterfaceSubClass;
ss->protocol = iface->desc.bInterfaceProtocol;
}
/* set the handler pointers based on the protocol */
debug("Transport: ");
switch (ss->protocol) {
case US_PR_CB:
debug("Control/Bulk\n");
ss->transport = usb_stor_CB_transport;
ss->transport_reset = usb_stor_CB_reset;
break;
case US_PR_CBI:
debug("Control/Bulk/Interrupt\n");
ss->transport = usb_stor_CB_transport;
ss->transport_reset = usb_stor_CB_reset;
break;
case US_PR_BULK:
debug("Bulk/Bulk/Bulk\n");
ss->transport = usb_stor_BBB_transport;
ss->transport_reset = usb_stor_BBB_reset;
break;
default:
printf("USB Storage Transport unknown / not yet implemented\n");
return 0;
break;
}
/*
* We are expecting a minimum of 2 endpoints - in and out (bulk).
* An optional interrupt is OK (necessary for CBI protocol).
* We will ignore any others.
*/
for (i = 0; i < iface->desc.bNumEndpoints; i++) {
ep_desc = &iface->ep_desc[i];
/* is it an BULK endpoint? */
if ((ep_desc->bmAttributes &
USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_BULK) {
if (ep_desc->bEndpointAddress & USB_DIR_IN)
ss->ep_in = ep_desc->bEndpointAddress &
USB_ENDPOINT_NUMBER_MASK;
else
ss->ep_out =
ep_desc->bEndpointAddress &
USB_ENDPOINT_NUMBER_MASK;
}
/* is it an interrupt endpoint? */
if ((ep_desc->bmAttributes &
USB_ENDPOINT_XFERTYPE_MASK) == USB_ENDPOINT_XFER_INT) {
ss->ep_int = ep_desc->bEndpointAddress &
USB_ENDPOINT_NUMBER_MASK;
ss->irqinterval = ep_desc->bInterval;
}
}
debug("Endpoints In %d Out %d Int %d\n",
ss->ep_in, ss->ep_out, ss->ep_int);
/* Do some basic sanity checks, and bail if we find a problem */
if (usb_set_interface(dev, iface->desc.bInterfaceNumber, 0) ||
!ss->ep_in || !ss->ep_out ||
(ss->protocol == US_PR_CBI && ss->ep_int == 0)) {
debug("Problems with device\n");
return 0;
}
/* set class specific stuff */
/* We only handle certain protocols. Currently, these are
* the only ones.
* The SFF8070 accepts the requests used in u-boot
*/
if (ss->subclass != US_SC_UFI && ss->subclass != US_SC_SCSI &&
ss->subclass != US_SC_8070) {
printf("Sorry, protocol %d not yet supported.\n", ss->subclass);
return 0;
}
if (ss->ep_int) {
/* we had found an interrupt endpoint, prepare irq pipe
* set up the IRQ pipe and handler
*/
ss->irqinterval = (ss->irqinterval > 0) ? ss->irqinterval : 255;
ss->irqpipe = usb_rcvintpipe(ss->pusb_dev, ss->ep_int);
ss->irqmaxp = usb_maxpacket(dev, ss->irqpipe);
dev->irq_handle = usb_stor_irq;
}
dev->privptr = (void *)ss;
return 1;
}
int usb_stor_get_info(struct usb_device *dev, struct us_data *ss,
block_dev_desc_t *dev_desc)
{
unsigned char perq, modi;
ALLOC_CACHE_ALIGN_BUFFER(unsigned long, cap, 2);
ALLOC_CACHE_ALIGN_BUFFER(unsigned char, usb_stor_buf, 36);
unsigned long *capacity, *blksz;
ccb *pccb = &usb_ccb;
pccb->pdata = usb_stor_buf;
dev_desc->target = dev->devnum;
pccb->lun = dev_desc->lun;
debug(" address %d\n", dev_desc->target);
if (usb_inquiry(pccb, ss))
return -1;
perq = usb_stor_buf[0];
modi = usb_stor_buf[1];
if ((perq & 0x1f) == 0x1f) {
/* skip unknown devices */
return 0;
}
if ((modi&0x80) == 0x80) {
/* drive is removable */
dev_desc->removable = 1;
}
memcpy(&dev_desc->vendor[0], (const void *) &usb_stor_buf[8], 8);
memcpy(&dev_desc->product[0], (const void *) &usb_stor_buf[16], 16);
memcpy(&dev_desc->revision[0], (const void *) &usb_stor_buf[32], 4);
dev_desc->vendor[8] = 0;
dev_desc->product[16] = 0;
dev_desc->revision[4] = 0;
#ifdef CONFIG_USB_BIN_FIXUP
usb_bin_fixup(dev->descriptor, (uchar *)dev_desc->vendor,
(uchar *)dev_desc->product);
#endif /* CONFIG_USB_BIN_FIXUP */
debug("ISO Vers %X, Response Data %X\n", usb_stor_buf[2],
usb_stor_buf[3]);
if (usb_test_unit_ready(pccb, ss)) {
printf("Device NOT ready\n"
" Request Sense returned %02X %02X %02X\n",
pccb->sense_buf[2], pccb->sense_buf[12],
pccb->sense_buf[13]);
if (dev_desc->removable == 1) {
dev_desc->type = perq;
return 1;
}
return 0;
}
pccb->pdata = (unsigned char *)&cap[0];
memset(pccb->pdata, 0, 8);
if (usb_read_capacity(pccb, ss) != 0) {
printf("READ_CAP ERROR\n");
cap[0] = 2880;
cap[1] = 0x200;
}
ss->flags &= ~USB_READY;
debug("Read Capacity returns: 0x%lx, 0x%lx\n", cap[0], cap[1]);
#if 0
if (cap[0] > (0x200000 * 10)) /* greater than 10 GByte */
cap[0] >>= 16;
#endif
cap[0] = cpu_to_be32(cap[0]);
cap[1] = cpu_to_be32(cap[1]);
/* this assumes bigendian! */
cap[0] += 1;
capacity = &cap[0];
blksz = &cap[1];
debug("Capacity = 0x%lx, blocksz = 0x%lx\n", *capacity, *blksz);
dev_desc->lba = *capacity;
dev_desc->blksz = *blksz;
dev_desc->log2blksz = LOG2(dev_desc->blksz);
dev_desc->type = perq;
debug(" address %d\n", dev_desc->target);
debug("partype: %d\n", dev_desc->part_type);
init_part(dev_desc);
debug("partype: %d\n", dev_desc->part_type);
return 1;
}