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path: root/drivers/usb/storage/sddr55.c
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Diffstat (limited to 'drivers/usb/storage/sddr55.c')
-rw-r--r--drivers/usb/storage/sddr55.c1006
1 files changed, 1006 insertions, 0 deletions
diff --git a/drivers/usb/storage/sddr55.c b/drivers/usb/storage/sddr55.c
new file mode 100644
index 000000000..aacedef96
--- /dev/null
+++ b/drivers/usb/storage/sddr55.c
@@ -0,0 +1,1006 @@
+/* Driver for SanDisk SDDR-55 SmartMedia reader
+ *
+ * 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/module.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"
+
+MODULE_DESCRIPTION("Driver for SanDisk SDDR-55 SmartMedia reader");
+MODULE_AUTHOR("Simon Munton");
+MODULE_LICENSE("GPL");
+
+/*
+ * The table of devices
+ */
+#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
+ vendorName, productName, useProtocol, useTransport, \
+ initFunction, flags) \
+{ USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
+ .driver_info = (flags) }
+
+static struct usb_device_id sddr55_usb_ids[] = {
+# include "unusual_sddr55.h"
+ { } /* Terminating entry */
+};
+MODULE_DEVICE_TABLE(usb, sddr55_usb_ids);
+
+#undef UNUSUAL_DEV
+
+/*
+ * The flags table
+ */
+#define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
+ vendor_name, product_name, use_protocol, use_transport, \
+ init_function, Flags) \
+{ \
+ .vendorName = vendor_name, \
+ .productName = product_name, \
+ .useProtocol = use_protocol, \
+ .useTransport = use_transport, \
+ .initFunction = init_function, \
+}
+
+static struct us_unusual_dev sddr55_unusual_dev_list[] = {
+# include "unusual_sddr55.h"
+ { } /* Terminating entry */
+};
+
+#undef UNUSUAL_DEV
+
+
+#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);
+
+ usb_stor_dbg(us, "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;
+
+ 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_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);
+
+ usb_stor_dbg(us, "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;
+}
+
+
+static 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;
+
+ usb_stor_dbg(us, "Reading capacity...\n");
+
+ result = sddr55_read_deviceID(us,
+ &manufacturerID,
+ &deviceID);
+
+ usb_stor_dbg(us, "Result of read_deviceID is %d\n", result);
+
+ if (result != USB_STOR_XFER_GOOD)
+ return 0;
+
+ usb_stor_dbg(us, "Device ID = %02X\n", deviceID);
+ usb_stor_dbg(us, "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(KERN_WARNING
+ "sddr55: map inconsistency at LBA %04X\n",
+ lba + zone * 1000);
+ info->force_read_only = 1;
+ }
+
+ if (lba<0x10 || (lba>=0x3E0 && lba<0x3EF))
+ usb_stor_dbg(us, "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
+ */
+static 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) {
+ usb_stor_dbg(us, "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 ) {
+ usb_stor_dbg(us, "Dummy up request for mode page 1\n");
+ return USB_STOR_TRANSPORT_GOOD;
+
+ } else if ( (srb->cmnd[2] & 0x3F) == 0x3F ) {
+ usb_stor_dbg(us, "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) {
+
+ usb_stor_dbg(us, "%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) {
+
+ usb_stor_dbg(us, "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) {
+ usb_stor_dbg(us, "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 {
+ usb_stor_dbg(us, "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?
+}
+
+
+static int sddr55_probe(struct usb_interface *intf,
+ const struct usb_device_id *id)
+{
+ struct us_data *us;
+ int result;
+
+ result = usb_stor_probe1(&us, intf, id,
+ (id - sddr55_usb_ids) + sddr55_unusual_dev_list);
+ if (result)
+ return result;
+
+ us->transport_name = "SDDR55";
+ us->transport = sddr55_transport;
+ us->transport_reset = sddr55_reset;
+ us->max_lun = 0;
+
+ result = usb_stor_probe2(us);
+ return result;
+}
+
+static struct usb_driver sddr55_driver = {
+ .name = "ums-sddr55",
+ .probe = sddr55_probe,
+ .disconnect = usb_stor_disconnect,
+ .suspend = usb_stor_suspend,
+ .resume = usb_stor_resume,
+ .reset_resume = usb_stor_reset_resume,
+ .pre_reset = usb_stor_pre_reset,
+ .post_reset = usb_stor_post_reset,
+ .id_table = sddr55_usb_ids,
+ .soft_unbind = 1,
+ .no_dynamic_id = 1,
+};
+
+module_usb_driver(sddr55_driver);
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-17 15:10:44 +0000