--- /dev/null
+/* 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 bytes\n",
+ 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 NAKed\n");
+
+ return US_BULK_TRANSFER_FAILED;
+ }
+
+ /* -ENOENT -- we canceled this transfer */
+ if (result == -ENOENT) {
+ US_DEBUGP("usbat_raw_bulk():"
+ " transfer aborted\n");
+ return US_BULK_TRANSFER_ABORTED;
+ }
+
+ if (result == -EPIPE) {
+ US_DEBUGP("usbat_raw_bulk():"
+ " output pipe stalled\n");
+ return US_BULK_TRANSFER_FAILED;
+ }
+
+ /* the catch-all case */
+ US_DEBUGP("us_transfer_partial(): unknown error\n");
+ return US_BULK_TRANSFER_FAILED;
+ }
+
+ if (act_len != len) {
+ US_DEBUGP("Warning: Transferred only %d bytes\n",
+ act_len);
+ return US_BULK_TRANSFER_SHORT;
+ }
+
+ US_DEBUGP("Transferred %d of %d bytes\n", 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("%s\n", string);
+ strcpy(string, "wr: ");
+ }
+ }
+ if ((i%16)!=0)
+ US_DEBUGP("%s\n", string);
+ }
+#endif
+
+ /* transfer the data */
+
+ US_DEBUGP("SCM data %s transfer %d\n",
+ ( 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("%s\n", string);
+ strcpy(string, "rd: ");
+ }
+ }
+ if ((i%16)!=0)
+ US_DEBUGP("%s\n", 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 %d\n",
+ 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 %02X\n",
+ 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 %d\n",
+ 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(page_address(sg[i].page) + sg[i].offset, 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,
+ page_address(sg[i].page) + sg[i].offset,
+ 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 %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 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 block\n");
+
+ 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 %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);
+
+ /* 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 %d\n",
+ 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 %d\n",
+ 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 %d\n",
+ 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 %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);
+ 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 %d\n",
+ 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 %d\n",
+ result);
+
+ if (result != US_BULK_TRANSFER_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[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 %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(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/%02x\n", 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 || 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 1\n");
+
+ 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 pages\n");
+
+ 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 %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, ptr, srb->use_sg);
+ } 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, 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?
+}
+
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