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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 22:20:36 (GMT) |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /drivers/usb/storage/sddr55.c | |
download | linux-fsl-qoriq-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'drivers/usb/storage/sddr55.c')
-rw-r--r-- | drivers/usb/storage/sddr55.c | 938 |
1 files changed, 938 insertions, 0 deletions
diff --git a/drivers/usb/storage/sddr55.c b/drivers/usb/storage/sddr55.c new file mode 100644 index 0000000..229ca18 --- /dev/null +++ b/drivers/usb/storage/sddr55.c @@ -0,0 +1,938 @@ +/* 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 */ + if (info->lba_to_pba) + kfree(info->lba_to_pba); + if (info->pba_to_lba) + 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, index, offset; + + // 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 */ + index = offset = 0; + + 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, + &index, &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, index, offset; + + /* 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; + index = offset = 0; + + 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, + &index, &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 manufacturerID; + unsigned char 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; + } + + if (info->lba_to_pba) + kfree(info->lba_to_pba); + if (info->pba_to_lba) + 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) { + if (info->lba_to_pba != NULL) + kfree(info->lba_to_pba); + if (info->pba_to_lba != NULL) + 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; + + if (info->lba_to_pba) + kfree(info->lba_to_pba); + if (info->pba_to_lba) + 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 = kmalloc( + sizeof(struct sddr55_card_info), GFP_NOIO); + if (!us->extra) + return USB_STOR_TRANSPORT_ERROR; + memset(us->extra, 0, sizeof(struct sddr55_card_info)); + 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? +} + |