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u-boot/common/usb_storage.c
wdenk affae2bff8 Initial revision
2002-08-17 09:36:01 +00:00

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/*
* (C) Copyright 2001
* Denis Peter, MPL AG Switzerland
*
* Most of this source has been derived from the Linux USB
* project.
*
* 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.
*/
#include <common.h>
#include <command.h>
#include <asm/processor.h>
#if (CONFIG_COMMANDS & CFG_CMD_USB)
#include <usb.h>
#ifdef CONFIG_USB_STORAGE
#undef USB_STOR_DEBUG
#ifdef USB_STOR_DEBUG
#define USB_STOR_PRINTF(fmt,args...) printf (fmt ,##args)
#else
#define USB_STOR_PRINTF(fmt,args...)
#endif
#include <scsi.h>
/* 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
#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*, 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);
void uhci_show_temp_int_td(void);
block_dev_desc_t *usb_stor_get_dev(int index)
{
return &usb_dev_desc[index];
}
void usb_show_progress(void)
{
printf(".");
}
/*********************************************************************************
* (re)-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 bus for storage devices...\n");
}
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])) {
if(mode==1) {
printf (" Device %d: ", usb_max_devs);
dev_print(&usb_dev_desc[usb_max_devs]);
} /* if mode */
usb_max_devs++;
} /* if get info ok */
} /* 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 */
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;
}
#ifdef USB_STOR_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 */
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 */
#ifdef USB_STOR_DEBUG
display_int_status(us->pusb_dev->status);
#endif
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;
}
/* 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;
USB_STOR_PRINTF("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 */
wait_ms(1500);
USB_STOR_PRINTF("CB_reset result %d: status %X 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));
USB_STOR_PRINTF("CB_reset done\n");
return 0;
}
/* FIXME: we also need a CBI_command which sets up the completion
* interrupt, and waits for it
*/
int usb_stor_CB_comdat(ccb *srb, struct us_data *us)
{
int result;
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--) {
USB_STOR_PRINTF("CBI gets a command: Try %d\n",5-retry);
#ifdef USB_STOR_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);
USB_STOR_PRINTF("CB_transport: control msg returned %d, status %X\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;
USB_STOR_PRINTF(" stall during command found, clear pipe\n");
usb_clear_halt(us->pusb_dev, usb_sndctrlpipe(us->pusb_dev,0));
us->pusb_dev->status=status;
}
USB_STOR_PRINTF(" error during command %02X Stat = %X\n",srb->cmd[0],us->pusb_dev->status);
return result;
}
/* transfer the data payload for this command, if one exists*/
USB_STOR_PRINTF("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, srb->pdata,srb->datalen);
USB_STOR_PRINTF("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;
}
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==0)
break;
wait_ms(10);
}
if (us->ip_wanted) {
printf(" Did not get interrupt on CBI\n");
us->ip_wanted = 0;
return USB_STOR_TRANSPORT_ERROR;
}
USB_STOR_PRINTF("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
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);
USB_STOR_PRINTF("command / Data returned %d, status %X\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) {
USB_STOR_PRINTF(" 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) {
USB_STOR_PRINTF(" 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)) {
USB_STOR_PRINTF("ERROR %X\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 */
USB_STOR_PRINTF("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);
USB_STOR_PRINTF("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)) {
USB_STOR_PRINTF(" AUTO REQUEST ERROR %d\n",us->pusb_dev->status);
return USB_STOR_TRANSPORT_ERROR;
}
USB_STOR_PRINTF("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 {
wait_ms(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=3;
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);
USB_STOR_PRINTF("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;
return 0;
ptr=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);
USB_STOR_PRINTF("Request Sense returned %02X %02X %02X\n",srb->sense_buf[2],srb->sense_buf[12],srb->sense_buf[13]);
srb->pdata=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)
{
return 0;
}
} while(retries--);
return -1;
}
static int usb_read_capacity(ccb *srb,struct us_data *ss)
{
int retry;
retry=2; /* retries */
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;
USB_STOR_PRINTF("read10: start %lx blocks %x\n",start,blocks);
return ss->transport(srb,ss);
}
#define USB_MAX_READ_BLK 20
unsigned long usb_stor_read(int device, unsigned long blknr, unsigned long blkcnt, unsigned long *buffer)
{
unsigned long start,blks, buf_addr;
unsigned short smallblks;
struct usb_device *dev;
int retry,i;
ccb *srb=&usb_ccb;
device&=0xff;
/* Setup device
*/
USB_STOR_PRINTF("\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;
}
usb_disable_asynch(1); /* asynch transfer not allowed */
srb->lun=usb_dev_desc[device].lun;
buf_addr=(unsigned long)buffer;
start=blknr;
blks=blkcnt;
if(usb_test_unit_ready(srb,(struct us_data *)dev->privptr)) {
printf("Device NOT ready\n Request Sense returned %02X %02X %02X\n",
srb->sense_buf[2],srb->sense_buf[12],srb->sense_buf[13]);
return 0;
}
USB_STOR_PRINTF("\nusb_read: dev %d startblk %lx, blccnt %lx buffer %lx\n",device,start,blks, buf_addr);
do {
retry=2;
srb->pdata=(unsigned char *)buf_addr;
if(blks>USB_MAX_READ_BLK) {
smallblks=USB_MAX_READ_BLK;
}
else {
smallblks=(unsigned short) blks;
}
retry_it:
if(smallblks==USB_MAX_READ_BLK)
usb_show_progress();
srb->datalen=usb_dev_desc[device].blksz * smallblks;
srb->pdata=(unsigned char *)buf_addr;
if(usb_read_10(srb,(struct us_data *)dev->privptr, start, smallblks)) {
USB_STOR_PRINTF("Read ERROR\n");
usb_request_sense(srb,(struct us_data *)dev->privptr);
if(retry--)
goto retry_it;
blkcnt-=blks;
break;
}
start+=smallblks;
blks-=smallblks;
buf_addr+=srb->datalen;
} while(blks!=0);
USB_STOR_PRINTF("usb_read: end startblk %lx, blccnt %x buffer %lx\n",start,smallblks,buf_addr);
usb_disable_asynch(0); /* asynch transfer allowed */
if(blkcnt>=USB_MAX_READ_BLK)
printf("\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_descriptor *iface;
int i;
unsigned int flags = 0;
int protocol = 0;
int subclass = 0;
memset(ss, 0, sizeof(struct us_data));
/* let's examine the device now */
iface = &dev->config.if_desc[ifnum];
#if 0
/* this is the place to patch some storage devices */
USB_STOR_PRINTF("iVendor %X iProduct %X\n",dev->descriptor.idVendor,dev->descriptor.idProduct);
if ((dev->descriptor.idVendor) == 0x066b && (dev->descriptor.idProduct) == 0x0103) {
USB_STOR_PRINTF("patched for E-USB\n");
protocol = US_PR_CB;
subclass = US_SC_UFI; /* an assumption */
}
#endif
if (dev->descriptor.bDeviceClass != 0 ||
iface->bInterfaceClass != USB_CLASS_MASS_STORAGE ||
iface->bInterfaceSubClass < US_SC_MIN ||
iface->bInterfaceSubClass > US_SC_MAX) {
/* if it's not a mass storage, we go no further */
return 0;
}
/* At this point, we know we've got a live one */
USB_STOR_PRINTF("\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->bInterfaceSubClass;
ss->protocol = iface->bInterfaceProtocol;
}
/* set the handler pointers based on the protocol */
USB_STOR_PRINTF("Transport: ");
switch (ss->protocol) {
case US_PR_CB:
USB_STOR_PRINTF("Control/Bulk\n");
ss->transport = usb_stor_CB_transport;
ss->transport_reset = usb_stor_CB_reset;
break;
case US_PR_CBI:
USB_STOR_PRINTF("Control/Bulk/Interrupt\n");
ss->transport = usb_stor_CB_transport;
ss->transport_reset = usb_stor_CB_reset;
break;
default:
printf("USB Starage 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->bNumEndpoints; i++) {
/* is it an BULK endpoint? */
if ((iface->ep_desc[i].bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
== USB_ENDPOINT_XFER_BULK) {
if (iface->ep_desc[i].bEndpointAddress & USB_DIR_IN)
ss->ep_in = iface->ep_desc[i].bEndpointAddress &
USB_ENDPOINT_NUMBER_MASK;
else
ss->ep_out = iface->ep_desc[i].bEndpointAddress &
USB_ENDPOINT_NUMBER_MASK;
}
/* is it an interrupt endpoint? */
if ((iface->ep_desc[i].bmAttributes & USB_ENDPOINT_XFERTYPE_MASK)
== USB_ENDPOINT_XFER_INT) {
ss->ep_int = iface->ep_desc[i].bEndpointAddress &
USB_ENDPOINT_NUMBER_MASK;
ss->irqinterval = iface->ep_desc[i].bInterval;
}
}
USB_STOR_PRINTF("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->bInterfaceNumber, 0) ||
!ss->ep_in || !ss->ep_out ||
(ss->protocol == US_PR_CBI && ss->ep_int == 0)) {
USB_STOR_PRINTF("Problems with device\n");
return 0;
}
/* set class specific stuff */
/* We only handle certain protocols. Currently, this is
* the only one.
*/
if (ss->subclass != US_SC_UFI) {
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;
unsigned long cap[2];
unsigned long *capacity,*blksz;
ccb *pccb=&usb_ccb;
ss->transport_reset(ss);
pccb->pdata=usb_stor_buf;
dev_desc->target=dev->devnum;
pccb->lun=dev_desc->lun;
USB_STOR_PRINTF(" 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) {
return 0; /* skip unknown devices */
}
if((modi&0x80)==0x80) {/* drive is removable */
dev_desc->removable=1;
}
memcpy(&dev_desc->vendor[0], &usb_stor_buf[8], 8);
memcpy(&dev_desc->product[0], &usb_stor_buf[16], 16);
memcpy(&dev_desc->revision[0], &usb_stor_buf[32], 4);
dev_desc->vendor[8]=0;
dev_desc->product[16]=0;
dev_desc->revision[4]=0;
USB_STOR_PRINTF("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;
}
else
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;
}
USB_STOR_PRINTF("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]+=1;
capacity=&cap[0];
blksz=&cap[1];
USB_STOR_PRINTF("Capacity = 0x%lx, blocksz = 0x%lx\n",*capacity,*blksz);
dev_desc->lba=*capacity;
dev_desc->blksz=*blksz;
dev_desc->type=perq;
USB_STOR_PRINTF(" address %d\n",dev_desc->target);
USB_STOR_PRINTF("partype: %d\n",dev_desc->part_type);
init_part(dev_desc);
USB_STOR_PRINTF("partype: %d\n",dev_desc->part_type);
return 1;
}
#endif
#endif /* CONFIG_USB_STORAGE */
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