sddr55.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:26k
- /* 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 "transport.h"
- #include "protocol.h"
- #include "usb.h"
- #include "debug.h"
- #include "sddr55.h"
- #include <linux/sched.h>
- #include <linux/errno.h>
- #include <linux/slab.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_raw_bulk(struct us_data *us,
- int direction,
- unsigned char *data,
- unsigned int len) {
- int result;
- int act_len;
- int pipe;
- if (direction == SCSI_DATA_READ)
- pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
- else
- pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
- result = usb_stor_bulk_msg(us, data, pipe, len, &act_len);
- /* if we stall, we need to clear it before we go on */
- if (result == -EPIPE) {
- US_DEBUGP("EPIPE: clearing endpoint halt for"
- " pipe 0x%x, stalled at %d bytesn",
- pipe, act_len);
- usb_clear_halt(us->pusb_dev, pipe);
- }
- if (result) {
- /* NAK - that means we've retried a few times already */
- if (result == -ETIMEDOUT) {
- US_DEBUGP("usbat_raw_bulk():"
- " device NAKedn");
- return US_BULK_TRANSFER_FAILED;
- }
- /* -ENOENT -- we canceled this transfer */
- if (result == -ENOENT) {
- US_DEBUGP("usbat_raw_bulk():"
- " transfer abortedn");
- return US_BULK_TRANSFER_ABORTED;
- }
- if (result == -EPIPE) {
- US_DEBUGP("usbat_raw_bulk():"
- " output pipe stalledn");
- return US_BULK_TRANSFER_FAILED;
- }
- /* the catch-all case */
- US_DEBUGP("us_transfer_partial(): unknown errorn");
- return US_BULK_TRANSFER_FAILED;
- }
- if (act_len != len) {
- US_DEBUGP("Warning: Transferred only %d bytesn",
- act_len);
- return US_BULK_TRANSFER_SHORT;
- }
- US_DEBUGP("Transferred %d of %d bytesn", act_len, len);
- return US_BULK_TRANSFER_GOOD;
- }
- /*
- * Note: direction must be set if command_len == 0.
- */
- static int sddr55_bulk_transport(struct us_data *us,
- int direction,
- unsigned char *data,
- unsigned int len) {
- int result = USB_STOR_TRANSPORT_GOOD;
- struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
- if (len==0)
- return USB_STOR_TRANSPORT_GOOD;
- info->last_access = jiffies;
- #ifdef CONFIG_USB_STORAGE_DEBUG
- if (direction == SCSI_DATA_WRITE) {
- int i;
- char string[64];
- /* Debug-print the first 48 bytes of the write transfer */
- strcpy(string, "wr: ");
- for (i=0; i<len && i<48; i++) {
- sprintf(string+strlen(string), "%02X ",
- data[i]);
- if ((i%16)==15) {
- US_DEBUGP("%sn", string);
- strcpy(string, "wr: ");
- }
- }
- if ((i%16)!=0)
- US_DEBUGP("%sn", string);
- }
- #endif
- /* transfer the data */
- US_DEBUGP("SCM data %s transfer %dn",
- ( direction==SCSI_DATA_READ ? "in" : "out"),
- len);
- result = sddr55_raw_bulk(us, direction, data, len);
- #ifdef CONFIG_USB_STORAGE_DEBUG
- if (direction == SCSI_DATA_READ) {
- int i;
- char string[64];
- /* Debug-print the first 48 bytes of the read transfer */
- strcpy(string, "rd: ");
- for (i=0; i<len && i<48; i++) {
- sprintf(string+strlen(string), "%02X ",
- data[i]);
- if ((i%16)==15) {
- US_DEBUGP("%sn", string);
- strcpy(string, "rd: ");
- }
- }
- if ((i%16)!=0)
- US_DEBUGP("%sn", string);
- }
- #endif
- return result;
- }
- /* 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[8] = {
- 0, 0, 0, 0, 0, 0xb0, 0, 0x80
- };
- unsigned char status[8];
- struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
- /* send command */
- result = sddr55_bulk_transport(us,
- SCSI_DATA_WRITE, command, 8);
- US_DEBUGP("Result for send_command in status %dn",
- result);
- if (result != US_BULK_TRANSFER_GOOD) {
- set_sense_info (4, 0, 0); /* hardware error */
- return result;
- }
- result = sddr55_bulk_transport(us,
- SCSI_DATA_READ, status, 4);
- /* expect to get short transfer if no card fitted */
- if (result == US_BULK_TRANSFER_SHORT) {
- /* 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 result;
- }
- if (result != US_BULK_TRANSFER_GOOD) {
- set_sense_info (4, 0, 0); /* hardware error */
- return result;
- }
-
- /* check write protect status */
- info->read_only = (status[0] & 0x20);
- /* now read status */
- result = sddr55_bulk_transport(us,
- SCSI_DATA_READ, status, 2);
- if (result != US_BULK_TRANSFER_GOOD) {
- set_sense_info (4, 0, 0); /* hardware error */
- }
- return result;
- }
- static int sddr55_read_data(struct us_data *us,
- unsigned int lba,
- unsigned int page,
- unsigned short sectors,
- unsigned char *content,
- int use_sg) {
- int result;
- unsigned char command[8] = {
- 0, 0, 0, 0, 0, 0xb0, 0, 0x85
- };
- unsigned char status[8];
- struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
- unsigned int pba;
- unsigned long address;
- unsigned short pages;
- unsigned char *buffer = NULL;
- unsigned char *ptr;
- struct scatterlist *sg = NULL;
- int i;
- int len;
- int transferred;
- // If we're using scatter-gather, we have to create a new
- // buffer to read all of the data in first, since a
- // scatter-gather buffer could in theory start in the middle
- // of a page, which would be bad. A developer who wants a
- // challenge might want to write a limited-buffer
- // version of this code.
- len = sectors * PAGESIZE;
- if (use_sg) {
- sg = (struct scatterlist *)content;
- buffer = kmalloc(len, GFP_NOIO);
- if (buffer == NULL)
- return USB_STOR_TRANSPORT_ERROR;
- ptr = buffer;
- } else
- ptr = content;
- // This could be made much more efficient by checking for
- // contiguous LBA's. Another exercise left to the student.
- 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 = info->blocksize - page;
- if (pages > (sectors << info->smallpageshift))
- pages = (sectors << info->smallpageshift);
- US_DEBUGP("Read %02X pages, from PBA %04X"
- " (LBA %04X) page %02Xn",
- pages, pba, lba, page);
- if (pba == NOT_ALLOCATED) {
- /* no pba for this lba, fill with zeroes */
- memset (ptr, 0, pages << info->pageshift);
- } else {
- address = (pba << info->blockshift) + page;
- command[1] = LSB_of(address>>16);
- command[2] = LSB_of(address>>8);
- command[3] = LSB_of(address);
- command[6] = LSB_of(pages << (1 - info->smallpageshift));
- /* send command */
- result = sddr55_bulk_transport(us,
- SCSI_DATA_WRITE, command, 8);
- US_DEBUGP("Result for send_command in read_data %dn",
- result);
- if (result != US_BULK_TRANSFER_GOOD) {
- if (use_sg)
- kfree(buffer);
- return result;
- }
- /* read data */
- result = sddr55_bulk_transport(us,
- SCSI_DATA_READ, ptr,
- pages<<info->pageshift);
- if (result != US_BULK_TRANSFER_GOOD) {
- if (use_sg)
- kfree(buffer);
- return result;
- }
- /* now read status */
- result = sddr55_bulk_transport(us,
- SCSI_DATA_READ, status, 2);
- if (result != US_BULK_TRANSFER_GOOD) {
- if (use_sg)
- kfree(buffer);
- return result;
- }
- /* check status for error */
- if (status[0] == 0xff && status[1] == 0x4) {
- set_sense_info (3, 0x11, 0);
- if (use_sg)
- kfree(buffer);
- return USB_STOR_TRANSPORT_FAILED;
- }
- }
- page = 0;
- lba++;
- sectors -= pages >> info->smallpageshift;
- ptr += (pages << info->pageshift);
- }
- if (use_sg) {
- transferred = 0;
- for (i=0; i<use_sg && transferred<len; i++) {
- memcpy(sg[i].address, buffer+transferred,
- len-transferred > sg[i].length ?
- sg[i].length : len-transferred);
- transferred += sg[i].length;
- }
- kfree(buffer);
- }
- return USB_STOR_TRANSPORT_GOOD;
- }
- static int sddr55_write_data(struct us_data *us,
- unsigned int lba,
- unsigned int page,
- unsigned short sectors,
- unsigned char *content,
- int use_sg) {
- int result;
- unsigned char command[8] = {
- 0, 0, 0, 0, 0, 0xb0, 0, 0x86
- };
- unsigned char status[8];
- struct sddr55_card_info *info = (struct sddr55_card_info *)us->extra;
- unsigned int pba;
- unsigned int new_pba;
- unsigned long address;
- unsigned short pages;
- unsigned char *buffer = NULL;
- unsigned char *ptr;
- struct scatterlist *sg = NULL;
- int i;
- int len;
- int transferred;
- /* 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;
- }
- // If we're using scatter-gather, we have to create a new
- // buffer to write all of the data in first, since a
- // scatter-gather buffer could in theory start in the middle
- // of a page, which would be bad. A developer who wants a
- // challenge might want to write a limited-buffer
- // version of this code.
- len = sectors * PAGESIZE;
- if (use_sg) {
- sg = (struct scatterlist *)content;
- buffer = kmalloc(len, GFP_NOIO);
- if (buffer == NULL)
- return USB_STOR_TRANSPORT_ERROR;
- transferred = 0;
- for (i=0; i<use_sg && transferred<len; i++) {
- memcpy(buffer+transferred, sg[i].address,
- len-transferred > sg[i].length ?
- sg[i].length : len-transferred);
- transferred += sg[i].length;
- }
- ptr = buffer;
- } else
- ptr = content;
- 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 = info->blocksize - page;
- if (pages > (sectors << info->smallpageshift))
- pages = (sectors << info->smallpageshift);
- US_DEBUGP("Write %02X pages, to PBA %04X"
- " (LBA %04X) page %02Xn",
- 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 %04Xn",lba);
- if (max_pba > 1024)
- max_pba = 1024;
- /* scan through the map lookiong 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, couldn't find an unallocated block */
- US_DEBUGP("Couldn't find unallocated blockn");
- set_sense_info (3, 0x31, 0); /* medium error */
- if (use_sg)
- kfree(buffer);
- return USB_STOR_TRANSPORT_FAILED;
- }
- US_DEBUGP("Allocating PBA %04X for LBA %04Xn", 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);
- /* send command */
- result = sddr55_bulk_transport(us,
- SCSI_DATA_WRITE, command, 8);
- if (result != US_BULK_TRANSFER_GOOD) {
- US_DEBUGP("Result for send_command in write_data %dn",
- result);
- set_sense_info (3, 0x3, 0); /* peripheral write error */
-
- if (use_sg)
- kfree(buffer);
- return result;
- }
- /* send the data */
- result = sddr55_bulk_transport(us,
- SCSI_DATA_WRITE, ptr,
- pages<<info->pageshift);
- if (result != US_BULK_TRANSFER_GOOD) {
- US_DEBUGP("Result for send_data in write_data %dn",
- result);
- set_sense_info (3, 0x3, 0); /* peripheral write error */
- if (use_sg)
- kfree(buffer);
- return result;
- }
- /* now read status */
- result = sddr55_bulk_transport(us,
- SCSI_DATA_READ, status, 6);
- if (result != US_BULK_TRANSFER_GOOD) {
- US_DEBUGP("Result for get_status in write_data %dn",
- result);
- set_sense_info (3, 0x3, 0); /* peripheral write error */
- if (use_sg)
- kfree(buffer);
- return result;
- }
- new_pba = (status[3] + (status[4] << 8) + (status[5] << 16)) >> info->blockshift;
- /* check status for error */
- if (status[0] == 0xff && status[1] == 0x4) {
- set_sense_info (3, 0x0c, 0);
- if (use_sg)
- kfree(buffer);
- info->pba_to_lba[new_pba] = BAD_BLOCK;
- return USB_STOR_TRANSPORT_FAILED;
- }
- US_DEBUGP("Updating maps for LBA %04X: old PBA %04X, new PBA %04Xn",
- 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 %04Xn",
- new_pba, info->pba_to_lba[new_pba]);
- info->fatal_error = 1;
- set_sense_info (3, 0x31, 0);
- if (use_sg)
- kfree(buffer);
- return USB_STOR_TRANSPORT_FAILED;
- }
- /* update the pba<->lba maps for new_pba */
- info->pba_to_lba[new_pba] = lba % 1000;
- page = 0;
- lba++;
- sectors -= pages >> info->smallpageshift;
- ptr += (pages << info->pageshift);
- }
- if (use_sg) {
- kfree(buffer);
- }
- return USB_STOR_TRANSPORT_GOOD;
- }
- static int sddr55_read_deviceID(struct us_data *us,
- unsigned char *manufacturerID,
- unsigned char *deviceID) {
- int result;
- unsigned char command[8] = {
- 0, 0, 0, 0, 0, 0xb0, 0, 0x84
- };
- unsigned char content[64];
- result = sddr55_bulk_transport(us, SCSI_DATA_WRITE, command, 8);
- US_DEBUGP("Result of send_control for device ID is %dn",
- result);
- if (result != US_BULK_TRANSFER_GOOD)
- return result;
- result = sddr55_bulk_transport(us,
- SCSI_DATA_READ, content, 4);
- if (result != US_BULK_TRANSFER_GOOD)
- return result;
- *manufacturerID = content[0];
- *deviceID = content[1];
- if (content[0] != 0xff) {
- result = sddr55_bulk_transport(us,
- SCSI_DATA_READ, content, 2);
- }
- return result;
- }
- 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 %dn",
- result);
- if (result != US_BULK_TRANSFER_GOOD)
- return 0;
- US_DEBUGP("Device ID = %02Xn", deviceID);
- US_DEBUGP("Manuf ID = %02Xn", 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[8] = { 0, 0, 0, 0, 0, 0xb0, 0, 0x8a};
- 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;
- command[6] = numblocks * 2 / 256;
- result = sddr55_bulk_transport(us, SCSI_DATA_WRITE, command, 8);
- if ( result != US_BULK_TRANSFER_GOOD) {
- kfree (buffer);
- return -1;
- }
- result = sddr55_bulk_transport(us, SCSI_DATA_READ, buffer, numblocks * 2);
- if ( result != US_BULK_TRANSFER_GOOD) {
- kfree (buffer);
- return -1;
- }
- result = sddr55_bulk_transport(us, SCSI_DATA_READ, command, 2);
- if ( result != US_BULK_TRANSFER_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 %04Xn", lba + zone * 1000);
- info->force_read_only = 1;
- }
- if (lba<0x10 || (lba>=0x3E0 && lba<0x3EF))
- US_DEBUGP("LBA %04X <-> PBA %04Xn", 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(Scsi_Cmnd *srb, struct us_data *us)
- {
- int result;
- int i;
- unsigned char inquiry_response[36] = {
- 0x00, 0x80, 0x00, 0x02, 0x1F, 0x00, 0x00, 0x00
- };
- unsigned char mode_page_01[16] = { // write-protected for now
- 0x03, 0x00, 0x80, 0x00,
- 0x01, 0x0A,
- 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
- };
- unsigned char *ptr;
- 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);
- ptr = (unsigned char *)srb->request_buffer;
- if (srb->cmnd[0] == REQUEST_SENSE) {
- i = srb->cmnd[4];
- if (i > sizeof info->sense_data)
- i = sizeof info->sense_data;
- US_DEBUGP("SDDR55: request sense %02x/%02x/%02xn", info->sense_data[2], info->sense_data[12], info->sense_data[13]);
- info->sense_data[0] = 0x70;
- info->sense_data[7] = 10;
- memcpy (ptr, info->sense_data, i);
- 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) {
- memset(inquiry_response+8, 0, 28);
- fill_inquiry_response(us, inquiry_response, 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--;
- ptr[0] = MSB_of(capacity>>16);
- ptr[1] = LSB_of(capacity>>16);
- ptr[2] = MSB_of(capacity&0xFFFF);
- ptr[3] = LSB_of(capacity&0xFFFF);
- // The page size
- ptr[4] = MSB_of(PAGESIZE>>16);
- ptr[5] = LSB_of(PAGESIZE>>16);
- ptr[6] = MSB_of(PAGESIZE&0xFFFF);
- ptr[7] = LSB_of(PAGESIZE&0xFFFF);
- sddr55_read_map(us);
- return USB_STOR_TRANSPORT_GOOD;
- }
- if (srb->cmnd[0] == MODE_SENSE) {
- mode_page_01[2] = (info->read_only || info->force_read_only) ? 0x80 : 0;
- if ( (srb->cmnd[2] & 0x3F) == 0x01 ) {
- US_DEBUGP(
- "SDDR55: Dummy up request for mode page 1n");
- if (ptr==NULL ||
- srb->request_bufflen<sizeof(mode_page_01)) {
- set_sense_info (5, 0x24, 0); /* invalid field in command */
- return USB_STOR_TRANSPORT_FAILED;
- }
- memcpy(ptr, mode_page_01, sizeof(mode_page_01));
- return USB_STOR_TRANSPORT_GOOD;
- } else if ( (srb->cmnd[2] & 0x3F) == 0x3F ) {
- US_DEBUGP(
- "SDDR55: Dummy up request for all mode pagesn");
- if (ptr==NULL ||
- srb->request_bufflen<sizeof(mode_page_01)) {
- set_sense_info (5, 0x24, 0); /* invalid field in command */
- return USB_STOR_TRANSPORT_FAILED;
- }
- memcpy(ptr, mode_page_01, sizeof(mode_page_01));
- 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 %04Xn", 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 %dn",
- pba, lba, page, pages);
- return sddr55_write_data(us, lba, page, pages, ptr, srb->use_sg);
- } else {
- US_DEBUGP("READ_10: read block %04X (LBA %04X) page %01X"
- " pages %dn",
- pba, lba, page, pages);
- return sddr55_read_data(us, lba, page, pages, ptr, srb->use_sg);
- }
- }
- 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?
- }