📄 usb_storage.c
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/*
* 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 <gj@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.
* Nota bene: if you are using the BBB support with a little-endian
* CPU then you MUST define LITTLEENDIAN in the configuration file!
*/
//#include <common.h>
//#include <command.h>
//#include <asm/processor.h>
#include "usb.h"
#include "s3c2410.h"
#include "scsi.h"
//#undef USB_STOR_DEBUG
#undef BBB_COMDAT_TRACE
#undef BBB_XPORT_TRACE
#define USB_STOR_DEBUG
//#define BBB_COMDAT_TRACE
//#define BBB_XPORT_TRACE
#ifdef USB_STOR_DEBUG
//#define USB_STOR_PRINTF(fmt,args...) s_UartPrint (fmt ,##args)
#define USB_STOR_PRINTF s_UartPrint
#else
#define USB_STOR_PRINTF
#endif
/* direction table -- this indicates the direction of the data
* transfer for each command code -- a 1 indicates input
*/
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 unsigned char usb_stor_buf[512];
static ccb usb_ccb;
/*
* 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 = 0;
/* 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 = 0; /* 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*, struct us_data*);
typedef int (*trans_reset)(struct us_data*);
struct us_data
{
struct usb_device *pusb_dev; /* this usb_device */
unsigned int flags; /* from filter initially */
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 */
};
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, unsigned long blknr, unsigned long blkcnt, unsigned long *buffer);
struct usb_device * usb_get_dev_index(int index);
block_dev_desc_t *usb_stor_get_dev(int index)
{
return &usb_dev_desc[index];
}
void usb_show_progress(void)
{
USB_STOR_PRINTF(".");
}
/*********************************************************************************
* show info on storage devices; 'usb start/init' must be invoked earlier
* as we only retrieve structures populated during devices initialization
*/
void usb_stor_info(void)
{
int i;
if (usb_max_devs > 0)
for (i = 0; i < usb_max_devs; i++)
{
USB_STOR_PRINTF("Device %d: ", i);
dev_print(&usb_dev_desc[i]);
}
else
USB_STOR_PRINTF("No storage devices, perhaps not 'usb start'ed..?\n");
}
/*********************************************************************************
* 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;
/* GJ */
memset(usb_stor_buf, 0, sizeof(usb_stor_buf));
if(mode==1)
{
USB_STOR_PRINTF("scanning bus 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].target=0xff;
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].block_read=usb_stor_read;
}
usb_max_devs=0;
for(i=0;i<USB_MAX_DEVICE;i++)
{
dev=usb_get_dev_index(i); /* get device */
USB_STOR_PRINTF("i=%d\n",i);
if(dev==NULL)
{
break; /* no more devices avaiable */
}
if(usb_storage_probe(dev,0,&usb_stor[usb_max_devs]))
{
/* ok, it is a storage devices */
/* get info and fill it in */
if(usb_stor_get_info(dev, &usb_stor[usb_max_devs], &usb_dev_desc[usb_max_devs]))
usb_max_devs++;
}
/* if storage device */
if(usb_max_devs==USB_MAX_STOR_DEV)
{
USB_STOR_PRINTF("max USB Storage Device reached: %d stopping\n",usb_max_devs);
break;
}
}
/* for */
usb_disable_asynch(0); /* asynch transfer allowed */
USB_STOR_PRINTF("%d Storage Device(s) found\n", usb_max_devs);
if(usb_max_devs>0)
return 0;
else
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;
}
static void usb_show_srb(ccb * pccb)
{
int i;
USB_STOR_PRINTF("SRB: len %d datalen 0x%lX\n ",pccb->cmdlen,pccb->datalen);
for(i=0;i<12;i++)
{
USB_STOR_PRINTF("%02X ",pccb->cmd[i]);
}
USB_STOR_PRINTF("\n");
}
static void display_int_status(unsigned long tmp)
{
USB_STOR_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" : "");
}
/***********************************************************************
* 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 */
USB_STOR_PRINTF("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);
USB_STOR_PRINTF("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 */
display_int_status(us->pusb_dev->status);
if (us->pusb_dev->status & USB_ST_STALLED)
{
USB_STOR_PRINTF("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)
{
USB_STOR_PRINTF("bulk transferred with error %X, but data ok\n",us->pusb_dev->status);
return 0;
}
else
return result;
}
if (us->pusb_dev->status & USB_ST_NAK_REC)
{
USB_STOR_PRINTF("Device NAKed bulk_msg\n");
return result;
}
if(this_xfer == partial)
{
USB_STOR_PRINTF("bulk transferred with error %d, but data ok\n",us->pusb_dev->status);
return 0;
}
/* if our try counter reaches 0, bail out */
USB_STOR_PRINTF("bulk transferred with error %d, 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.
*/
USB_STOR_PRINTF("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, 0, 0, USB_CNTL_TIMEOUT*5);
if((result < 0) && (us->pusb_dev->status & USB_ST_STALLED))
{
USB_STOR_PRINTF("RESET:stall\n");
return -1;
}
/* long wait for reset */
wait_ms(150);
USB_STOR_PRINTF("BBB_reset result %d: status %X 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 */
wait_ms(150);
USB_STOR_PRINTF("BBB_reset result %d: status %X 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);
wait_ms(150);
USB_STOR_PRINTF("BBB_reset result %d: status %X clearing OUT endpoint\n",result,us->pusb_dev->status);
USB_STOR_PRINTF("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
*/
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