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;
usb_stor_dbg(us, "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);
usb_stor_dbg(us, "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);
usb_stor_dbg(us, "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;
usb_stor_dbg(us, "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 */
usb_stor_dbg(us, "Couldn't find unallocated block\n");
set_sense_info (3, 0x31, 0); /* medium error */
result = USB_STOR_TRANSPORT_FAILED;
goto leave;
}
usb_stor_dbg(us, "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) {
usb_stor_dbg(us, "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) {
usb_stor_dbg(us, "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) {
usb_stor_dbg(us, "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;
}
usb_stor_dbg(us, "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_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;
}