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usb_storage.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* Most of this source has been derived from the Linux USB
* project:
* (c) 1999-2002 Matthew Dharm ([email protected])
* (c) 2000 David L. Brown, Jr. ([email protected])
* (c) 1999 Michael Gee ([email protected])
* (c) 2000 Yggdrasil Computing, Inc.
*
*
* Adapted for U-Boot:
* (C) Copyright 2001 Denis Peter, MPL AG Switzerland
* Driver model conversion:
* (C) Copyright 2015 Google, Inc
*
* For BBB support (C) Copyright 2003
* Gary Jennejohn, DENX Software Engineering <[email protected]>
*
* BBB support based on /sys/dev/usb/umass.c from
* FreeBSD.
*/
/* 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 <blk.h>
#include <bootdev.h>
#include <command.h>
#include <dm.h>
#include <errno.h>
#include <log.h>
#include <mapmem.h>
#include <memalign.h>
#include <asm/byteorder.h>
#include <asm/cache.h>
#include <asm/processor.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <linux/delay.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 struct scsi_cmd usb_ccb __aligned(ARCH_DMA_MINALIGN);
static __u32 CBWTag;
static int usb_max_devs; /* number of highest available usb device */
#if !CONFIG_IS_ENABLED(BLK)
static struct blk_desc usb_dev_desc[USB_MAX_STOR_DEV];
#endif
struct us_data;
typedef int (*trans_cmnd)(struct scsi_cmd *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 */
struct scsi_cmd *srb; /* current srb */
trans_reset transport_reset; /* reset routine */
trans_cmnd transport; /* transport routine */
unsigned short max_xfer_blk; /* maximum transfer blocks */
bool cmd12; /* use 12-byte commands (RBC/UFI) */
};
#if !CONFIG_IS_ENABLED(BLK)
static struct us_data usb_stor[USB_MAX_STOR_DEV];
#endif
#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,
struct blk_desc *dev_desc);
int usb_storage_probe(struct usb_device *dev, unsigned int ifnum,
struct us_data *ss);
#if CONFIG_IS_ENABLED(BLK)
static unsigned long usb_stor_read(struct udevice *dev, lbaint_t blknr,
lbaint_t blkcnt, void *buffer);
static unsigned long usb_stor_write(struct udevice *dev, lbaint_t blknr,
lbaint_t blkcnt, const void *buffer);
#else
static unsigned long usb_stor_read(struct blk_desc *block_dev, lbaint_t blknr,
lbaint_t blkcnt, void *buffer);
static unsigned long usb_stor_write(struct blk_desc *block_dev, lbaint_t blknr,
lbaint_t blkcnt, const void *buffer);
#endif
void uhci_show_temp_int_td(void);
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 count = 0;
#if CONFIG_IS_ENABLED(BLK)
struct udevice *dev;
for (blk_first_device(UCLASS_USB, &dev);
dev;
blk_next_device(&dev)) {
struct blk_desc *desc = dev_get_uclass_plat(dev);
printf(" Device %d: ", desc->devnum);
dev_print(desc);
count++;
}
#else
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;
}
#endif
if (!count) {
printf("No storage devices, perhaps not 'usb start'ed..?\n");
return 1;
}
return 0;
}
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;
}
static int usb_stor_probe_device(struct usb_device *udev)
{
int lun, max_lun;
#if CONFIG_IS_ENABLED(BLK)
struct us_data *data;
int ret;
#else
int start;
if (udev == NULL)
return -ENOENT; /* no more devices available */
#endif
debug("\n\nProbing for storage\n");
#if CONFIG_IS_ENABLED(BLK)
/*
* We store the us_data in the mass storage device's plat. It
* is shared by all LUNs (block devices) attached to this mass storage
* device.
*/
data = dev_get_plat(udev->dev);
if (!usb_storage_probe(udev, 0, data))
return 0;
max_lun = usb_get_max_lun(data);
for (lun = 0; lun <= max_lun; lun++) {
struct blk_desc *blkdev;
struct udevice *dev;
char str[10];
snprintf(str, sizeof(str), "lun%d", lun);
ret = blk_create_devicef(udev->dev, "usb_storage_blk", str,
UCLASS_USB, usb_max_devs,
DEFAULT_BLKSZ, 0, &dev);
if (ret) {
debug("Cannot bind driver\n");
return ret;
}
blkdev = dev_get_uclass_plat(dev);
blkdev->target = 0xff;
blkdev->lun = lun;
ret = usb_stor_get_info(udev, data, blkdev);
if (ret == 1) {
usb_max_devs++;
debug("%s: Found device %p\n", __func__, udev);
} else {
debug("usb_stor_get_info: Invalid device\n");
ret = device_unbind(dev);
if (ret)
return ret;
continue;
}
ret = blk_probe_or_unbind(dev);
if (ret)
return ret;
ret = bootdev_setup_for_sibling_blk(dev, "usb_bootdev");
if (ret) {
int ret2;
ret2 = device_unbind(dev);
if (ret2)
return log_msg_ret("bootdev", ret2);
return log_msg_ret("bootdev", ret);
}
}
#else
/* We don't have space to even probe if we hit the maximum */
if (usb_max_devs == USB_MAX_STOR_DEV) {
printf("max USB Storage Device reached: %d stopping\n",
usb_max_devs);
return -ENOSPC;
}
if (!usb_storage_probe(udev, 0, &usb_stor[usb_max_devs]))
return 0;
/*
* OK, it's a storage device. Iterate over its LUNs and populate
* usb_dev_desc'
*/
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++) {
struct blk_desc *blkdev;
blkdev = &usb_dev_desc[usb_max_devs];
memset(blkdev, '\0', sizeof(struct blk_desc));
blkdev->uclass_id = UCLASS_USB;
blkdev->devnum = usb_max_devs;
blkdev->part_type = PART_TYPE_UNKNOWN;
blkdev->target = 0xff;
blkdev->type = DEV_TYPE_UNKNOWN;
blkdev->block_read = usb_stor_read;
blkdev->block_write = usb_stor_write;
blkdev->lun = lun;
blkdev->priv = udev;
if (usb_stor_get_info(udev, &usb_stor[start],
&usb_dev_desc[usb_max_devs]) == 1) {
debug("partype: %d\n", blkdev->part_type);
part_init(blkdev);
debug("partype: %d\n", blkdev->part_type);
usb_max_devs++;
debug("%s: Found device %p\n", __func__, udev);
}
}
#endif
return 0;
}
void usb_stor_reset(void)
{
usb_max_devs = 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)
{
if (mode == 1)
printf(" scanning usb for storage devices... ");
#if !CONFIG_IS_ENABLED(DM_USB)
unsigned char i;
usb_disable_asynch(1); /* asynch transfer not allowed */
usb_stor_reset();
for (i = 0; i < USB_MAX_DEVICE; i++) {
struct usb_device *dev;
dev = usb_get_dev_index(i); /* get device */
debug("i=%d\n", i);
if (usb_stor_probe_device(dev))
break;
} /* for */
usb_disable_asynch(0); /* asynch transfer allowed */
#endif
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(struct scsi_cmd *pccb)
{
int i;
printf("SRB: len %d datalen 0x%lX\n ", pccb->cmdlen, pccb->datalen);
for (i = 0; i < pccb->cmdlen; 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%lx(%d) try #%d\n",
(ulong)map_to_sysmem(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(struct scsi_cmd *srb, struct us_data *us)
{
int result;
int actlen;
int dir_in;
unsigned int pipe;
ALLOC_CACHE_ALIGN_BUFFER(struct umass_bbb_cbw, 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(struct scsi_cmd *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(struct scsi_cmd *srb, struct us_data *us)
{
int timeout;
us->ip_wanted = 1;
usb_int_msg(us->pusb_dev, us->irqpipe,
(void *)&us->ip_data, us->irqmaxp, us->irqinterval, false);
timeout = 1000;
while (timeout--) {
if (us->ip_wanted == 0)
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, transferred %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)
{
/* ENDPOINT_HALT = 0, so set value to 0 */
return 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);
}
static int usb_stor_BBB_transport(struct scsi_cmd *srb, struct us_data *us)
{
int result, retry;
int dir_in;
int actlen, data_actlen;
unsigned int pipe, pipein, pipeout;
ALLOC_CACHE_ALIGN_BUFFER(struct umass_bbb_csw, 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(struct scsi_cmd *srb, struct us_data *us)
{
int result, status;
struct scsi_cmd *psrb;
struct scsi_cmd 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 = us->cmd12 ? 12 : 6;
/* 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 void usb_stor_set_max_xfer_blk(struct usb_device *udev,
struct us_data *us)
{
/*
* Limit the total size of a transfer to 120 KB.
*
* Some devices are known to choke with anything larger. It seems like
* the problem stems from the fact that original IDE controllers had
* only an 8-bit register to hold the number of sectors in one transfer
* and even those couldn't handle a full 256 sectors.
*
* Because we want to make sure we interoperate with as many devices as
* possible, we will maintain a 240 sector transfer size limit for USB
* Mass Storage devices.
*
* Tests show that other operating have similar limits with Microsoft
* Windows 7 limiting transfers to 128 sectors for both USB2 and USB3
* and Apple Mac OS X 10.11 limiting transfers to 256 sectors for USB2
* and 2048 for USB3 devices.
*/
unsigned short blk = 240;
#if CONFIG_IS_ENABLED(DM_USB)
size_t size;
int ret;
ret = usb_get_max_xfer_size(udev, (size_t *)&size);
if ((ret >= 0) && (size < blk * 512))
blk = size / 512;
#endif
us->max_xfer_blk = blk;
}
static int usb_inquiry(struct scsi_cmd *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 = ss->cmd12 ? 12 : 6;
i = ss->transport(srb, ss);