| /* 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 "raw_bulk.h" |
| #include "protocol.h" |
| #include "usb.h" |
| #include "debug.h" |
| #include "sddr55.h" |
| |
| #include <linux/jiffies.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_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 == SCSI_DATA_READ) ? |
| 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[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 != USB_STOR_XFER_GOOD) { |
| set_sense_info (4, 0, 0); /* hardware error */ |
| return USB_STOR_TRANSPORT_ERROR; |
| } |
| |
| result = sddr55_bulk_transport(us, |
| SCSI_DATA_READ, 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, |
| SCSI_DATA_READ, 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, |
| unsigned char *content, |
| int use_sg) { |
| |
| int result = USB_STOR_TRANSPORT_GOOD; |
| 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; |
| int len; |
| |
| len = sectors * PAGESIZE; |
| |
| buffer = (use_sg ? kmalloc(len, GFP_NOIO) : content); |
| if (buffer == NULL) |
| return USB_STOR_TRANSPORT_ERROR; /* out of memory */ |
| |
| ptr = buffer; |
| |
| 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 != USB_STOR_XFER_GOOD) { |
| result = USB_STOR_TRANSPORT_ERROR; |
| goto leave; |
| } |
| |
| /* read data */ |
| result = sddr55_bulk_transport(us, |
| SCSI_DATA_READ, ptr, |
| pages<<info->pageshift); |
| |
| if (result != USB_STOR_XFER_GOOD) { |
| result = USB_STOR_TRANSPORT_ERROR; |
| goto leave; |
| } |
| |
| /* now read status */ |
| result = sddr55_bulk_transport(us, |
| SCSI_DATA_READ, 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; |
| } |
| } |
| |
| page = 0; |
| lba++; |
| sectors -= pages >> info->smallpageshift; |
| ptr += (pages << info->pageshift); |
| } |
| |
| us_copy_to_sgbuf_all(buffer, len, content, use_sg); |
| result = USB_STOR_TRANSPORT_GOOD; |
| |
| leave: |
| if (use_sg) |
| kfree(buffer); |
| |
| return result; |
| } |
| |
| 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 = USB_STOR_TRANSPORT_GOOD; |
| 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; |
| int i, len; |
| |
| /* 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; |
| } |
| |
| len = sectors * PAGESIZE; |
| |
| buffer = us_copy_from_sgbuf_all(content, len, use_sg); |
| if (buffer == NULL) |
| return USB_STOR_TRANSPORT_ERROR; |
| |
| ptr = buffer; |
| |
| 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 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); |
| |
| /* send command */ |
| result = sddr55_bulk_transport(us, |
| SCSI_DATA_WRITE, 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, |
| SCSI_DATA_WRITE, ptr, |
| pages<<info->pageshift); |
| |
| 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, SCSI_DATA_READ, 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; |
| ptr += (pages << info->pageshift); |
| } |
| result = USB_STOR_TRANSPORT_GOOD; |
| |
| leave: |
| if (use_sg) |
| kfree(buffer); |
| return result; |
| } |
| |
| 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 != USB_STOR_XFER_GOOD) |
| return USB_STOR_TRANSPORT_ERROR; |
| |
| result = sddr55_bulk_transport(us, |
| SCSI_DATA_READ, 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, |
| SCSI_DATA_READ, 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[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 != USB_STOR_XFER_GOOD) { |
| kfree (buffer); |
| return -1; |
| } |
| |
| result = sddr55_bulk_transport(us, SCSI_DATA_READ, buffer, numblocks * 2); |
| |
| if ( result != USB_STOR_XFER_GOOD) { |
| kfree (buffer); |
| return -1; |
| } |
| |
| result = sddr55_bulk_transport(us, SCSI_DATA_READ, 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(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 || 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 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? |
| } |
| |