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linux/drivers/usb/storage/sddr55.c
Andrew Morton 8a20acc5fe USB: drivers/usb/storage/sddr55.c: fix uninitialized var warnings 
drivers/usb/storage/sddr55.c: In function 'sddr55_transport':
drivers/usb/storage/sddr55.c:526: warning: 'deviceID' may be used uninitialized in this function
drivers/usb/storage/sddr55.c:525: warning: 'manufacturerID' may be used uninitialized in this function

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-03-10 16:42:25 -07:00

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/* Driver for SanDisk SDDR-55 SmartMedia reader
*
* $Id:$
*
* SDDR55 driver v0.1:
*
* First release
*
* Current development and maintenance by:
* (c) 2002 Simon Munton
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <linux/jiffies.h>
#include <linux/errno.h>
#include <linux/slab.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include "usb.h"
#include "transport.h"
#include "protocol.h"
#include "debug.h"
#include "sddr55.h"
#define short_pack(lsb,msb) ( ((u16)(lsb)) | ( ((u16)(msb))<<8 ) )
#define LSB_of(s) ((s)&0xFF)
#define MSB_of(s) ((s)>>8)
#define PAGESIZE 512
#define set_sense_info(sk, asc, ascq) \
do { \
info->sense_data[2] = sk; \
info->sense_data[12] = asc; \
info->sense_data[13] = ascq; \
} while (0)
struct sddr55_card_info {
unsigned long capacity; /* Size of card in bytes */
int max_log_blks; /* maximum number of logical blocks */
int pageshift; /* log2 of pagesize */
int smallpageshift; /* 1 if pagesize == 256 */
int blocksize; /* Size of block in pages */
int blockshift; /* log2 of blocksize */
int blockmask; /* 2^blockshift - 1 */
int read_only; /* non zero if card is write protected */
int force_read_only; /* non zero if we find a map error*/
int *lba_to_pba; /* logical to physical map */
int *pba_to_lba; /* physical to logical map */
int fatal_error; /* set if we detect something nasty */
unsigned long last_access; /* number of jiffies since we last talked to device */
unsigned char sense_data[18];
};
#define NOT_ALLOCATED 0xffffffff
#define BAD_BLOCK 0xffff
#define CIS_BLOCK 0x400
#define UNUSED_BLOCK 0x3ff
static int
sddr55_bulk_transport(struct us_data *us, int direction,
unsigned char *data, unsigned int len) {
struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
unsigned int pipe = (direction == DMA_FROM_DEVICE) ?
us->recv_bulk_pipe : us->send_bulk_pipe;
if (!len)
return USB_STOR_XFER_GOOD;
info->last_access = jiffies;
return usb_stor_bulk_transfer_buf(us, pipe, data, len, NULL);
}
/* check if card inserted, if there is, update read_only status
* return non zero if no card
*/
static int sddr55_status(struct us_data *us)
{
int result;
unsigned char *command = us->iobuf;
unsigned char *status = us->iobuf;
struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
/* send command */
memset(command, 0, 8);
command[5] = 0xB0;
command[7] = 0x80;
result = sddr55_bulk_transport(us,
DMA_TO_DEVICE, command, 8);
US_DEBUGP("Result for send_command in status %d\n",
result);
if (result != USB_STOR_XFER_GOOD) {
set_sense_info (4, 0, 0); /* hardware error */
return USB_STOR_TRANSPORT_ERROR;
}
result = sddr55_bulk_transport(us,
DMA_FROM_DEVICE, status, 4);
/* expect to get short transfer if no card fitted */
if (result == USB_STOR_XFER_SHORT || result == USB_STOR_XFER_STALLED) {
/* had a short transfer, no card inserted, free map memory */
kfree(info->lba_to_pba);
kfree(info->pba_to_lba);
info->lba_to_pba = NULL;
info->pba_to_lba = NULL;
info->fatal_error = 0;
info->force_read_only = 0;
set_sense_info (2, 0x3a, 0); /* not ready, medium not present */
return USB_STOR_TRANSPORT_FAILED;
}
if (result != USB_STOR_XFER_GOOD) {
set_sense_info (4, 0, 0); /* hardware error */
return USB_STOR_TRANSPORT_FAILED;
}
/* check write protect status */
info->read_only = (status[0] & 0x20);
/* now read status */
result = sddr55_bulk_transport(us,
DMA_FROM_DEVICE, status, 2);
if (result != USB_STOR_XFER_GOOD) {
set_sense_info (4, 0, 0); /* hardware error */
}
return (result == USB_STOR_XFER_GOOD ?
USB_STOR_TRANSPORT_GOOD : USB_STOR_TRANSPORT_FAILED);
}
static int sddr55_read_data(struct us_data *us,
unsigned int lba,
unsigned int page,
unsigned short sectors) {
int result = USB_STOR_TRANSPORT_GOOD;
unsigned char *command = us->iobuf;
unsigned char *status = us->iobuf;
struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
unsigned char *buffer;
unsigned int pba;
unsigned long address;
unsigned short pages;
unsigned int len, offset;
struct scatterlist *sg;
// Since we only read in one block at a time, we have to create
// a bounce buffer and move the data a piece at a time between the
// bounce buffer and the actual transfer buffer.
len = min((unsigned int) sectors, (unsigned int) info->blocksize >>
info->smallpageshift) * PAGESIZE;
buffer = kmalloc(len, GFP_NOIO);
if (buffer == NULL)
return USB_STOR_TRANSPORT_ERROR; /* out of memory */
offset = 0;
sg = NULL;
while (sectors>0) {
/* have we got to end? */
if (lba >= info->max_log_blks)
break;
pba = info->lba_to_pba[lba];
// Read as many sectors as possible in this block
pages = min((unsigned int) sectors << info->smallpageshift,
info->blocksize - page);
len = pages << info->pageshift;
US_DEBUGP("Read %02X pages, from PBA %04X"
" (LBA %04X) page %02X\n",
pages, pba, lba, page);
if (pba == NOT_ALLOCATED) {
/* no pba for this lba, fill with zeroes */
memset (buffer, 0, len);
} else {
address = (pba << info->blockshift) + page;
command[0] = 0;
command[1] = LSB_of(address>>16);
command[2] = LSB_of(address>>8);
command[3] = LSB_of(address);
command[4] = 0;
command[5] = 0xB0;
command[6] = LSB_of(pages << (1 - info->smallpageshift));
command[7] = 0x85;
/* send command */
result = sddr55_bulk_transport(us,
DMA_TO_DEVICE, command, 8);
US_DEBUGP("Result for send_command in read_data %d\n",
result);
if (result != USB_STOR_XFER_GOOD) {
result = USB_STOR_TRANSPORT_ERROR;
goto leave;
}
/* read data */
result = sddr55_bulk_transport(us,
DMA_FROM_DEVICE, buffer, len);
if (result != USB_STOR_XFER_GOOD) {
result = USB_STOR_TRANSPORT_ERROR;
goto leave;
}
/* now read status */
result = sddr55_bulk_transport(us,
DMA_FROM_DEVICE, status, 2);
if (result != USB_STOR_XFER_GOOD) {
result = USB_STOR_TRANSPORT_ERROR;
goto leave;
}
/* check status for error */
if (status[0] == 0xff && status[1] == 0x4) {
set_sense_info (3, 0x11, 0);
result = USB_STOR_TRANSPORT_FAILED;
goto leave;
}
}
// Store the data in the transfer buffer
usb_stor_access_xfer_buf(buffer, len, us->srb,
&sg, &offset, TO_XFER_BUF);
page = 0;
lba++;
sectors -= pages >> info->smallpageshift;
}
result = USB_STOR_TRANSPORT_GOOD;
leave:
kfree(buffer);
return result;
}
static int sddr55_write_data(struct us_data *us,
unsigned int lba,
unsigned int page,
unsigned short sectors) {
int result = USB_STOR_TRANSPORT_GOOD;
unsigned char *command = us->iobuf;
unsigned char *status = us->iobuf;
struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
unsigned char *buffer;
unsigned int pba;
unsigned int new_pba;
unsigned long address;
unsigned short pages;
int i;
unsigned int len, offset;
struct scatterlist *sg;
/* check if we are allowed to write */
if (info->read_only || info->force_read_only) {
set_sense_info (7, 0x27, 0); /* read only */
return USB_STOR_TRANSPORT_FAILED;
}
// Since we only write one block at a time, we have to create
// a bounce buffer and move the data a piece at a time between the
// bounce buffer and the actual transfer buffer.
len = min((unsigned int) sectors, (unsigned int) info->blocksize >>
info->smallpageshift) * PAGESIZE;
buffer = kmalloc(len, GFP_NOIO);
if (buffer == NULL)
return USB_STOR_TRANSPORT_ERROR;
offset = 0;
sg = NULL;
while (sectors > 0) {
/* have we got to end? */
if (lba >= info->max_log_blks)
break;
pba = info->lba_to_pba[lba];
// Write as many sectors as possible in this block
pages = min((unsigned int) sectors << info->smallpageshift,
info->blocksize - page);
len = pages << info->pageshift;
// Get the data from the transfer buffer
usb_stor_access_xfer_buf(buffer, len, us->srb,
&sg, &offset, FROM_XFER_BUF);
US_DEBUGP("Write %02X pages, to PBA %04X"
" (LBA %04X) page %02X\n",
pages, pba, lba, page);
command[4] = 0;
if (pba == NOT_ALLOCATED) {
/* no pba allocated for this lba, find a free pba to use */
int max_pba = (info->max_log_blks / 250 ) * 256;
int found_count = 0;
int found_pba = -1;
/* set pba to first block in zone lba is in */
pba = (lba / 1000) * 1024;
US_DEBUGP("No PBA for LBA %04X\n",lba);
if (max_pba > 1024)
max_pba = 1024;
/*
* Scan through the map looking for an unused block
* leave 16 unused blocks at start (or as many as
* possible) since the sddr55 seems to reuse a used
* block when it shouldn't if we don't leave space.
*/
for (i = 0; i < max_pba; i++, pba++) {
if (info->pba_to_lba[pba] == UNUSED_BLOCK) {
found_pba = pba;
if (found_count++ > 16)
break;
}
}
pba = found_pba;
if (pba == -1) {
/* oh dear */
US_DEBUGP("Couldn't find unallocated block\n");
set_sense_info (3, 0x31, 0); /* medium error */
result = USB_STOR_TRANSPORT_FAILED;
goto leave;
}
US_DEBUGP("Allocating PBA %04X for LBA %04X\n", pba, lba);
/* set writing to unallocated block flag */
command[4] = 0x40;
}
address = (pba << info->blockshift) + page;
command[1] = LSB_of(address>>16);
command[2] = LSB_of(address>>8);
command[3] = LSB_of(address);
/* set the lba into the command, modulo 1000 */
command[0] = LSB_of(lba % 1000);
command[6] = MSB_of(lba % 1000);
command[4] |= LSB_of(pages >> info->smallpageshift);
command[5] = 0xB0;
command[7] = 0x86;
/* send command */
result = sddr55_bulk_transport(us,
DMA_TO_DEVICE, command, 8);
if (result != USB_STOR_XFER_GOOD) {
US_DEBUGP("Result for send_command in write_data %d\n",
result);
/* set_sense_info is superfluous here? */
set_sense_info (3, 0x3, 0);/* peripheral write error */
result = USB_STOR_TRANSPORT_FAILED;
goto leave;
}
/* send the data */
result = sddr55_bulk_transport(us,
DMA_TO_DEVICE, buffer, len);
if (result != USB_STOR_XFER_GOOD) {
US_DEBUGP("Result for send_data in write_data %d\n",
result);
/* set_sense_info is superfluous here? */
set_sense_info (3, 0x3, 0);/* peripheral write error */
result = USB_STOR_TRANSPORT_FAILED;
goto leave;
}
/* now read status */
result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, status, 6);
if (result != USB_STOR_XFER_GOOD) {
US_DEBUGP("Result for get_status in write_data %d\n",
result);
/* set_sense_info is superfluous here? */
set_sense_info (3, 0x3, 0);/* peripheral write error */
result = USB_STOR_TRANSPORT_FAILED;
goto leave;
}
new_pba = (status[3] + (status[4] << 8) + (status[5] << 16))
>> info->blockshift;
/* check status for error */
if (status[0] == 0xff && status[1] == 0x4) {
info->pba_to_lba[new_pba] = BAD_BLOCK;
set_sense_info (3, 0x0c, 0);
result = USB_STOR_TRANSPORT_FAILED;
goto leave;
}
US_DEBUGP("Updating maps for LBA %04X: old PBA %04X, new PBA %04X\n",
lba, pba, new_pba);
/* update the lba<->pba maps, note new_pba might be the same as pba */
info->lba_to_pba[lba] = new_pba;
info->pba_to_lba[pba] = UNUSED_BLOCK;
/* check that new_pba wasn't already being used */
if (info->pba_to_lba[new_pba] != UNUSED_BLOCK) {
printk(KERN_ERR "sddr55 error: new PBA %04X already in use for LBA %04X\n",
new_pba, info->pba_to_lba[new_pba]);
info->fatal_error = 1;
set_sense_info (3, 0x31, 0);
result = USB_STOR_TRANSPORT_FAILED;
goto leave;
}
/* update the pba<->lba maps for new_pba */
info->pba_to_lba[new_pba] = lba % 1000;
page = 0;
lba++;
sectors -= pages >> info->smallpageshift;
}
result = USB_STOR_TRANSPORT_GOOD;
leave:
kfree(buffer);
return result;
}
static int sddr55_read_deviceID(struct us_data *us,
unsigned char *manufacturerID,
unsigned char *deviceID) {
int result;
unsigned char *command = us->iobuf;
unsigned char *content = us->iobuf;
memset(command, 0, 8);
command[5] = 0xB0;
command[7] = 0x84;
result = sddr55_bulk_transport(us, DMA_TO_DEVICE, command, 8);
US_DEBUGP("Result of send_control for device ID is %d\n",
result);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
result = sddr55_bulk_transport(us,
DMA_FROM_DEVICE, content, 4);
if (result != USB_STOR_XFER_GOOD)
return USB_STOR_TRANSPORT_ERROR;
*manufacturerID = content[0];
*deviceID = content[1];
if (content[0] != 0xff) {
result = sddr55_bulk_transport(us,
DMA_FROM_DEVICE, content, 2);
}
return USB_STOR_TRANSPORT_GOOD;
}
int sddr55_reset(struct us_data *us) {
return 0;
}
static unsigned long sddr55_get_capacity(struct us_data *us) {
unsigned char uninitialized_var(manufacturerID);
unsigned char uninitialized_var(deviceID);
int result;
struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
US_DEBUGP("Reading capacity...\n");
result = sddr55_read_deviceID(us,
&manufacturerID,
&deviceID);
US_DEBUGP("Result of read_deviceID is %d\n",
result);
if (result != USB_STOR_XFER_GOOD)
return 0;
US_DEBUGP("Device ID = %02X\n", deviceID);
US_DEBUGP("Manuf ID = %02X\n", manufacturerID);
info->pageshift = 9;
info->smallpageshift = 0;
info->blocksize = 16;
info->blockshift = 4;
info->blockmask = 15;
switch (deviceID) {
case 0x6e: // 1MB
case 0xe8:
case 0xec:
info->pageshift = 8;
info->smallpageshift = 1;
return 0x00100000;
case 0xea: // 2MB
case 0x64:
info->pageshift = 8;
info->smallpageshift = 1;
case 0x5d: // 5d is a ROM card with pagesize 512.
return 0x00200000;
case 0xe3: // 4MB
case 0xe5:
case 0x6b:
case 0xd5:
return 0x00400000;
case 0xe6: // 8MB
case 0xd6:
return 0x00800000;
case 0x73: // 16MB
info->blocksize = 32;
info->blockshift = 5;
info->blockmask = 31;
return 0x01000000;
case 0x75: // 32MB
info->blocksize = 32;
info->blockshift = 5;
info->blockmask = 31;
return 0x02000000;
case 0x76: // 64MB
info->blocksize = 32;
info->blockshift = 5;
info->blockmask = 31;
return 0x04000000;
case 0x79: // 128MB
info->blocksize = 32;
info->blockshift = 5;
info->blockmask = 31;
return 0x08000000;
default: // unknown
return 0;
}
}
static int sddr55_read_map(struct us_data *us) {
struct sddr55_card_info *info = (struct sddr55_card_info *)(us->extra);
int numblocks;
unsigned char *buffer;
unsigned char *command = us->iobuf;
int i;
unsigned short lba;
unsigned short max_lba;
int result;
if (!info->capacity)
return -1;
numblocks = info->capacity >> (info->blockshift + info->pageshift);
buffer = kmalloc( numblocks * 2, GFP_NOIO );
if (!buffer)
return -1;
memset(command, 0, 8);
command[5] = 0xB0;
command[6] = numblocks * 2 / 256;
command[7] = 0x8A;
result = sddr55_bulk_transport(us, DMA_TO_DEVICE, command, 8);
if ( result != USB_STOR_XFER_GOOD) {
kfree (buffer);
return -1;
}
result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, buffer, numblocks * 2);
if ( result != USB_STOR_XFER_GOOD) {
kfree (buffer);
return -1;
}
result = sddr55_bulk_transport(us, DMA_FROM_DEVICE, command, 2);
if ( result != USB_STOR_XFER_GOOD) {
kfree (buffer);
return -1;
}
kfree(info->lba_to_pba);
kfree(info->pba_to_lba);
info->lba_to_pba = kmalloc(numblocks*sizeof(int), GFP_NOIO);
info->pba_to_lba = kmalloc(numblocks*sizeof(int), GFP_NOIO);
if (info->lba_to_pba == NULL || info->pba_to_lba == NULL) {
kfree(info->lba_to_pba);
kfree(info->pba_to_lba);
info->lba_to_pba = NULL;
info->pba_to_lba = NULL;
kfree(buffer);
return -1;
}
memset(info->lba_to_pba, 0xff, numblocks*sizeof(int));
memset(info->pba_to_lba, 0xff, numblocks*sizeof(int));
/* set maximum lba */
max_lba = info->max_log_blks;
if (max_lba > 1000)
max_lba = 1000;
// Each block is 64 bytes of control data, so block i is located in
// scatterlist block i*64/128k = i*(2^6)*(2^-17) = i*(2^-11)
for (i=0; i<numblocks; i++) {
int zone = i / 1024;
lba = short_pack(buffer[i * 2], buffer[i * 2 + 1]);
/* Every 1024 physical blocks ("zone"), the LBA numbers
* go back to zero, but are within a higher
* block of LBA's. Also, there is a maximum of
* 1000 LBA's per zone. In other words, in PBA
* 1024-2047 you will find LBA 0-999 which are
* really LBA 1000-1999. Yes, this wastes 24
* physical blocks per zone. Go figure.
* These devices can have blocks go bad, so there
* are 24 spare blocks to use when blocks do go bad.
*/
/* SDDR55 returns 0xffff for a bad block, and 0x400 for the
* CIS block. (Is this true for cards 8MB or less??)
* Record these in the physical to logical map
*/
info->pba_to_lba[i] = lba;
if (lba >= max_lba) {
continue;
}
if (info->lba_to_pba[lba + zone * 1000] != NOT_ALLOCATED &&
!info->force_read_only) {
printk("sddr55: map inconsistency at LBA %04X\n", lba + zone * 1000);
info->force_read_only = 1;
}
if (lba<0x10 || (lba>=0x3E0 && lba<0x3EF))
US_DEBUGP("LBA %04X <-> PBA %04X\n", lba, i);
info->lba_to_pba[lba + zone * 1000] = i;
}
kfree(buffer);
return 0;
}
static void sddr55_card_info_destructor(void *extra) {
struct sddr55_card_info *info = (struct sddr55_card_info *)extra;
if (!extra)
return;
kfree(info->lba_to_pba);
kfree(info->pba_to_lba);
}
/*
* Transport for the Sandisk SDDR-55
*/
int sddr55_transport(struct scsi_cmnd *srb, struct us_data *us)
{
int result;
static unsigned char inquiry_response[8] = {
0x00, 0x80, 0x00, 0x02, 0x1F, 0x00, 0x00, 0x00
};
// write-protected for now, no block descriptor support
static unsigned char mode_page_01[20] = {
0x0, 0x12, 0x00, 0x80, 0x0, 0x0, 0x0, 0x0,
0x01, 0x0A,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
unsigned char *ptr = us->iobuf;
unsigned long capacity;
unsigned int lba;
unsigned int pba;
unsigned int page;
unsigned short pages;
struct sddr55_card_info *info;
if (!us->extra) {
us->extra = kzalloc(
sizeof(struct sddr55_card_info), GFP_NOIO);
if (!us->extra)
return USB_STOR_TRANSPORT_ERROR;
us->extra_destructor = sddr55_card_info_destructor;
}
info = (struct sddr55_card_info *)(us->extra);
if (srb->cmnd[0] == REQUEST_SENSE) {
US_DEBUGP("SDDR55: request sense %02x/%02x/%02x\n", info->sense_data[2], info->sense_data[12], info->sense_data[13]);
memcpy (ptr, info->sense_data, sizeof info->sense_data);
ptr[0] = 0x70;
ptr[7] = 11;
usb_stor_set_xfer_buf (ptr, sizeof info->sense_data, srb);
memset (info->sense_data, 0, sizeof info->sense_data);
return USB_STOR_TRANSPORT_GOOD;
}
memset (info->sense_data, 0, sizeof info->sense_data);
/* Dummy up a response for INQUIRY since SDDR55 doesn't
respond to INQUIRY commands */
if (srb->cmnd[0] == INQUIRY) {
memcpy(ptr, inquiry_response, 8);
fill_inquiry_response(us, ptr, 36);
return USB_STOR_TRANSPORT_GOOD;
}
/* only check card status if the map isn't allocated, ie no card seen yet
* or if it's been over half a second since we last accessed it
*/
if (info->lba_to_pba == NULL || time_after(jiffies, info->last_access + HZ/2)) {
/* check to see if a card is fitted */
result = sddr55_status (us);
if (result) {
result = sddr55_status (us);
if (!result) {
set_sense_info (6, 0x28, 0); /* new media, set unit attention, not ready to ready */
}
return USB_STOR_TRANSPORT_FAILED;
}
}
/* if we detected a problem with the map when writing,
don't allow any more access */
if (info->fatal_error) {
set_sense_info (3, 0x31, 0);
return USB_STOR_TRANSPORT_FAILED;
}
if (srb->cmnd[0] == READ_CAPACITY) {
capacity = sddr55_get_capacity(us);
if (!capacity) {
set_sense_info (3, 0x30, 0); /* incompatible medium */
return USB_STOR_TRANSPORT_FAILED;
}
info->capacity = capacity;
/* figure out the maximum logical block number, allowing for
* the fact that only 250 out of every 256 are used */
info->max_log_blks = ((info->capacity >> (info->pageshift + info->blockshift)) / 256) * 250;
/* Last page in the card, adjust as we only use 250 out of
* every 256 pages */
capacity = (capacity / 256) * 250;
capacity /= PAGESIZE;
capacity--;
((__be32 *) ptr)[0] = cpu_to_be32(capacity);
((__be32 *) ptr)[1] = cpu_to_be32(PAGESIZE);
usb_stor_set_xfer_buf(ptr, 8, srb);
sddr55_read_map(us);
return USB_STOR_TRANSPORT_GOOD;
}
if (srb->cmnd[0] == MODE_SENSE_10) {
memcpy(ptr, mode_page_01, sizeof mode_page_01);
ptr[3] = (info->read_only || info->force_read_only) ? 0x80 : 0;
usb_stor_set_xfer_buf(ptr, sizeof(mode_page_01), srb);
if ( (srb->cmnd[2] & 0x3F) == 0x01 ) {
US_DEBUGP(
"SDDR55: Dummy up request for mode page 1\n");
return USB_STOR_TRANSPORT_GOOD;
} else if ( (srb->cmnd[2] & 0x3F) == 0x3F ) {
US_DEBUGP(
"SDDR55: Dummy up request for all mode pages\n");
return USB_STOR_TRANSPORT_GOOD;
}
set_sense_info (5, 0x24, 0); /* invalid field in command */
return USB_STOR_TRANSPORT_FAILED;
}
if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
US_DEBUGP(
"SDDR55: %s medium removal. Not that I can do"
" anything about it...\n",
(srb->cmnd[4]&0x03) ? "Prevent" : "Allow");
return USB_STOR_TRANSPORT_GOOD;
}
if (srb->cmnd[0] == READ_10 || srb->cmnd[0] == WRITE_10) {
page = short_pack(srb->cmnd[3], srb->cmnd[2]);
page <<= 16;
page |= short_pack(srb->cmnd[5], srb->cmnd[4]);
pages = short_pack(srb->cmnd[8], srb->cmnd[7]);
page <<= info->smallpageshift;
// convert page to block and page-within-block
lba = page >> info->blockshift;
page = page & info->blockmask;
// locate physical block corresponding to logical block
if (lba >= info->max_log_blks) {
US_DEBUGP("Error: Requested LBA %04X exceeds maximum "
"block %04X\n", lba, info->max_log_blks-1);
set_sense_info (5, 0x24, 0); /* invalid field in command */
return USB_STOR_TRANSPORT_FAILED;
}
pba = info->lba_to_pba[lba];
if (srb->cmnd[0] == WRITE_10) {
US_DEBUGP("WRITE_10: write block %04X (LBA %04X) page %01X"
" pages %d\n",
pba, lba, page, pages);
return sddr55_write_data(us, lba, page, pages);
} else {
US_DEBUGP("READ_10: read block %04X (LBA %04X) page %01X"
" pages %d\n",
pba, lba, page, pages);
return sddr55_read_data(us, lba, page, pages);
}
}
if (srb->cmnd[0] == TEST_UNIT_READY) {
return USB_STOR_TRANSPORT_GOOD;
}
if (srb->cmnd[0] == START_STOP) {
return USB_STOR_TRANSPORT_GOOD;
}
set_sense_info (5, 0x20, 0); /* illegal command */
return USB_STOR_TRANSPORT_FAILED; // FIXME: sense buffer?
}
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