--- /dev/null
+/* Driver for SanDisk SDDR-09 SmartMedia reader
+ *
+ * (c) 2000, 2001 Robert Baruch (autophile@starband.net)
+ * (c) 2002 Andries Brouwer (aeb@cwi.nl)
+ * Developed with the assistance of:
+ * (c) 2002 Alan Stern <stern@rowland.org>
+ *
+ * The SanDisk SDDR-09 SmartMedia reader uses the Shuttle EUSB-01 chip.
+ * This chip is a programmable USB controller. In the SDDR-09, it has
+ * been programmed to obey a certain limited set of SCSI commands.
+ * This driver translates the "real" SCSI commands to the SDDR-09 SCSI
+ * commands.
+ *
+ * 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.
+ */
+
+/*
+ * Known vendor commands: 12 bytes, first byte is opcode
+ *
+ * E7: read scatter gather
+ * E8: read
+ * E9: write
+ * EA: erase
+ * EB: reset
+ * EC: read status
+ * ED: read ID
+ * EE: write CIS (?)
+ * EF: compute checksum (?)
+ */
+
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+
+#include "usb.h"
+#include "transport.h"
+#include "protocol.h"
+#include "debug.h"
+
+MODULE_DESCRIPTION("Driver for SanDisk SDDR-09 SmartMedia reader");
+MODULE_AUTHOR("Andries Brouwer <aeb@cwi.nl>, Robert Baruch <autophile@starband.net>");
+MODULE_LICENSE("GPL");
+
+static int usb_stor_sddr09_dpcm_init(struct us_data *us);
+static int sddr09_transport(struct scsi_cmnd *srb, struct us_data *us);
+static int usb_stor_sddr09_init(struct us_data *us);
+
+
+/*
+ * 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 sddr09_usb_ids[] = {
+# include "unusual_sddr09.h"
+ { } /* Terminating entry */
+};
+MODULE_DEVICE_TABLE(usb, sddr09_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 sddr09_unusual_dev_list[] = {
+# include "unusual_sddr09.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)
+
+/*
+ * First some stuff that does not belong here:
+ * data on SmartMedia and other cards, completely
+ * unrelated to this driver.
+ * Similar stuff occurs in <linux/mtd/nand_ids.h>.
+ */
+
+struct nand_flash_dev {
+ int model_id;
+ int chipshift; /* 1<<cs bytes total capacity */
+ char pageshift; /* 1<<ps bytes in a page */
+ char blockshift; /* 1<<bs pages in an erase block */
+ char zoneshift; /* 1<<zs blocks in a zone */
+ /* # of logical blocks is 125/128 of this */
+ char pageadrlen; /* length of an address in bytes - 1 */
+};
+
+/*
+ * NAND Flash Manufacturer ID Codes
+ */
+#define NAND_MFR_AMD 0x01
+#define NAND_MFR_NATSEMI 0x8f
+#define NAND_MFR_TOSHIBA 0x98
+#define NAND_MFR_SAMSUNG 0xec
+
+static inline char *nand_flash_manufacturer(int manuf_id) {
+ switch(manuf_id) {
+ case NAND_MFR_AMD:
+ return "AMD";
+ case NAND_MFR_NATSEMI:
+ return "NATSEMI";
+ case NAND_MFR_TOSHIBA:
+ return "Toshiba";
+ case NAND_MFR_SAMSUNG:
+ return "Samsung";
+ default:
+ return "unknown";
+ }
+}
+
+/*
+ * It looks like it is unnecessary to attach manufacturer to the
+ * remaining data: SSFDC prescribes manufacturer-independent id codes.
+ *
+ * 256 MB NAND flash has a 5-byte ID with 2nd byte 0xaa, 0xba, 0xca or 0xda.
+ */
+
+static struct nand_flash_dev nand_flash_ids[] = {
+ /* NAND flash */
+ { 0x6e, 20, 8, 4, 8, 2}, /* 1 MB */
+ { 0xe8, 20, 8, 4, 8, 2}, /* 1 MB */
+ { 0xec, 20, 8, 4, 8, 2}, /* 1 MB */
+ { 0x64, 21, 8, 4, 9, 2}, /* 2 MB */
+ { 0xea, 21, 8, 4, 9, 2}, /* 2 MB */
+ { 0x6b, 22, 9, 4, 9, 2}, /* 4 MB */
+ { 0xe3, 22, 9, 4, 9, 2}, /* 4 MB */
+ { 0xe5, 22, 9, 4, 9, 2}, /* 4 MB */
+ { 0xe6, 23, 9, 4, 10, 2}, /* 8 MB */
+ { 0x73, 24, 9, 5, 10, 2}, /* 16 MB */
+ { 0x75, 25, 9, 5, 10, 2}, /* 32 MB */
+ { 0x76, 26, 9, 5, 10, 3}, /* 64 MB */
+ { 0x79, 27, 9, 5, 10, 3}, /* 128 MB */
+
+ /* MASK ROM */
+ { 0x5d, 21, 9, 4, 8, 2}, /* 2 MB */
+ { 0xd5, 22, 9, 4, 9, 2}, /* 4 MB */
+ { 0xd6, 23, 9, 4, 10, 2}, /* 8 MB */
+ { 0x57, 24, 9, 4, 11, 2}, /* 16 MB */
+ { 0x58, 25, 9, 4, 12, 2}, /* 32 MB */
+ { 0,}
+};
+
+static struct nand_flash_dev *
+nand_find_id(unsigned char id) {
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(nand_flash_ids); i++)
+ if (nand_flash_ids[i].model_id == id)
+ return &(nand_flash_ids[i]);
+ return NULL;
+}
+
+/*
+ * ECC computation.
+ */
+static unsigned char parity[256];
+static unsigned char ecc2[256];
+
+static void nand_init_ecc(void) {
+ int i, j, a;
+
+ parity[0] = 0;
+ for (i = 1; i < 256; i++)
+ parity[i] = (parity[i&(i-1)] ^ 1);
+
+ for (i = 0; i < 256; i++) {
+ a = 0;
+ for (j = 0; j < 8; j++) {
+ if (i & (1<<j)) {
+ if ((j & 1) == 0)
+ a ^= 0x04;
+ if ((j & 2) == 0)
+ a ^= 0x10;
+ if ((j & 4) == 0)
+ a ^= 0x40;
+ }
+ }
+ ecc2[i] = ~(a ^ (a<<1) ^ (parity[i] ? 0xa8 : 0));
+ }
+}
+
+/* compute 3-byte ecc on 256 bytes */
+static void nand_compute_ecc(unsigned char *data, unsigned char *ecc) {
+ int i, j, a;
+ unsigned char par = 0, bit, bits[8] = {0};
+
+ /* collect 16 checksum bits */
+ for (i = 0; i < 256; i++) {
+ par ^= data[i];
+ bit = parity[data[i]];
+ for (j = 0; j < 8; j++)
+ if ((i & (1<<j)) == 0)
+ bits[j] ^= bit;
+ }
+
+ /* put 4+4+4 = 12 bits in the ecc */
+ a = (bits[3] << 6) + (bits[2] << 4) + (bits[1] << 2) + bits[0];
+ ecc[0] = ~(a ^ (a<<1) ^ (parity[par] ? 0xaa : 0));
+
+ a = (bits[7] << 6) + (bits[6] << 4) + (bits[5] << 2) + bits[4];
+ ecc[1] = ~(a ^ (a<<1) ^ (parity[par] ? 0xaa : 0));
+
+ ecc[2] = ecc2[par];
+}
+
+static int nand_compare_ecc(unsigned char *data, unsigned char *ecc) {
+ return (data[0] == ecc[0] && data[1] == ecc[1] && data[2] == ecc[2]);
+}
+
+static void nand_store_ecc(unsigned char *data, unsigned char *ecc) {
+ memcpy(data, ecc, 3);
+}
+
+/*
+ * The actual driver starts here.
+ */
+
+struct sddr09_card_info {
+ unsigned long capacity; /* Size of card in bytes */
+ int pagesize; /* Size of page in bytes */
+ int pageshift; /* log2 of pagesize */
+ int blocksize; /* Size of block in pages */
+ int blockshift; /* log2 of blocksize */
+ int blockmask; /* 2^blockshift - 1 */
+ int *lba_to_pba; /* logical to physical map */
+ int *pba_to_lba; /* physical to logical map */
+ int lbact; /* number of available pages */
+ int flags;
+#define SDDR09_WP 1 /* write protected */
+};
+
+/*
+ * On my 16MB card, control blocks have size 64 (16 real control bytes,
+ * and 48 junk bytes). In reality of course the card uses 16 control bytes,
+ * so the reader makes up the remaining 48. Don't know whether these numbers
+ * depend on the card. For now a constant.
+ */
+#define CONTROL_SHIFT 6
+
+/*
+ * On my Combo CF/SM reader, the SM reader has LUN 1.
+ * (and things fail with LUN 0).
+ * It seems LUN is irrelevant for others.
+ */
+#define LUN 1
+#define LUNBITS (LUN << 5)
+
+/*
+ * LBA and PBA are unsigned ints. Special values.
+ */
+#define UNDEF 0xffffffff
+#define SPARE 0xfffffffe
+#define UNUSABLE 0xfffffffd
+
+static const int erase_bad_lba_entries = 0;
+
+/* send vendor interface command (0x41) */
+/* called for requests 0, 1, 8 */
+static int
+sddr09_send_command(struct us_data *us,
+ unsigned char request,
+ unsigned char direction,
+ unsigned char *xfer_data,
+ unsigned int xfer_len) {
+ unsigned int pipe;
+ unsigned char requesttype = (0x41 | direction);
+ int rc;
+
+ // Get the receive or send control pipe number
+
+ if (direction == USB_DIR_IN)
+ pipe = us->recv_ctrl_pipe;
+ else
+ pipe = us->send_ctrl_pipe;
+
+ rc = usb_stor_ctrl_transfer(us, pipe, request, requesttype,
+ 0, 0, xfer_data, xfer_len);
+ switch (rc) {
+ case USB_STOR_XFER_GOOD: return 0;
+ case USB_STOR_XFER_STALLED: return -EPIPE;
+ default: return -EIO;
+ }
+}
+
+static int
+sddr09_send_scsi_command(struct us_data *us,
+ unsigned char *command,
+ unsigned int command_len) {
+ return sddr09_send_command(us, 0, USB_DIR_OUT, command, command_len);
+}
+
+#if 0
+/*
+ * Test Unit Ready Command: 12 bytes.
+ * byte 0: opcode: 00
+ */
+static int
+sddr09_test_unit_ready(struct us_data *us) {
+ unsigned char *command = us->iobuf;
+ int result;
+
+ memset(command, 0, 6);
+ command[1] = LUNBITS;
+
+ result = sddr09_send_scsi_command(us, command, 6);
+
+ usb_stor_dbg(us, "sddr09_test_unit_ready returns %d\n", result);
+
+ return result;
+}
+#endif
+
+/*
+ * Request Sense Command: 12 bytes.
+ * byte 0: opcode: 03
+ * byte 4: data length
+ */
+static int
+sddr09_request_sense(struct us_data *us, unsigned char *sensebuf, int buflen) {
+ unsigned char *command = us->iobuf;
+ int result;
+
+ memset(command, 0, 12);
+ command[0] = 0x03;
+ command[1] = LUNBITS;
+ command[4] = buflen;
+
+ result = sddr09_send_scsi_command(us, command, 12);
+ if (result)
+ return result;
+
+ result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
+ sensebuf, buflen, NULL);
+ return (result == USB_STOR_XFER_GOOD ? 0 : -EIO);
+}
+
+/*
+ * Read Command: 12 bytes.
+ * byte 0: opcode: E8
+ * byte 1: last two bits: 00: read data, 01: read blockwise control,
+ * 10: read both, 11: read pagewise control.
+ * It turns out we need values 20, 21, 22, 23 here (LUN 1).
+ * bytes 2-5: address (interpretation depends on byte 1, see below)
+ * bytes 10-11: count (idem)
+ *
+ * A page has 512 data bytes and 64 control bytes (16 control and 48 junk).
+ * A read data command gets data in 512-byte pages.
+ * A read control command gets control in 64-byte chunks.
+ * A read both command gets data+control in 576-byte chunks.
+ *
+ * Blocks are groups of 32 pages, and read blockwise control jumps to the
+ * next block, while read pagewise control jumps to the next page after
+ * reading a group of 64 control bytes.
+ * [Here 512 = 1<<pageshift, 32 = 1<<blockshift, 64 is constant?]
+ *
+ * (1 MB and 2 MB cards are a bit different, but I have only a 16 MB card.)
+ */
+
+static int
+sddr09_readX(struct us_data *us, int x, unsigned long fromaddress,
+ int nr_of_pages, int bulklen, unsigned char *buf,
+ int use_sg) {
+
+ unsigned char *command = us->iobuf;
+ int result;
+
+ command[0] = 0xE8;
+ command[1] = LUNBITS | x;
+ command[2] = MSB_of(fromaddress>>16);
+ command[3] = LSB_of(fromaddress>>16);
+ command[4] = MSB_of(fromaddress & 0xFFFF);
+ command[5] = LSB_of(fromaddress & 0xFFFF);
+ command[6] = 0;
+ command[7] = 0;
+ command[8] = 0;
+ command[9] = 0;
+ command[10] = MSB_of(nr_of_pages);
+ command[11] = LSB_of(nr_of_pages);
+
+ result = sddr09_send_scsi_command(us, command, 12);
+
+ if (result) {
+ usb_stor_dbg(us, "Result for send_control in sddr09_read2%d %d\n",
+ x, result);
+ return result;
+ }
+
+ result = usb_stor_bulk_transfer_sg(us, us->recv_bulk_pipe,
+ buf, bulklen, use_sg, NULL);
+
+ if (result != USB_STOR_XFER_GOOD) {
+ usb_stor_dbg(us, "Result for bulk_transfer in sddr09_read2%d %d\n",
+ x, result);
+ return -EIO;
+ }
+ return 0;
+}
+
+/*
+ * Read Data
+ *
+ * fromaddress counts data shorts:
+ * increasing it by 256 shifts the bytestream by 512 bytes;
+ * the last 8 bits are ignored.
+ *
+ * nr_of_pages counts pages of size (1 << pageshift).
+ */
+static int
+sddr09_read20(struct us_data *us, unsigned long fromaddress,
+ int nr_of_pages, int pageshift, unsigned char *buf, int use_sg) {
+ int bulklen = nr_of_pages << pageshift;
+
+ /* The last 8 bits of fromaddress are ignored. */
+ return sddr09_readX(us, 0, fromaddress, nr_of_pages, bulklen,
+ buf, use_sg);
+}
+
+/*
+ * Read Blockwise Control
+ *
+ * fromaddress gives the starting position (as in read data;
+ * the last 8 bits are ignored); increasing it by 32*256 shifts
+ * the output stream by 64 bytes.
+ *
+ * count counts control groups of size (1 << controlshift).
+ * For me, controlshift = 6. Is this constant?
+ *
+ * After getting one control group, jump to the next block
+ * (fromaddress += 8192).
+ */
+static int
+sddr09_read21(struct us_data *us, unsigned long fromaddress,
+ int count, int controlshift, unsigned char *buf, int use_sg) {
+
+ int bulklen = (count << controlshift);
+ return sddr09_readX(us, 1, fromaddress, count, bulklen,
+ buf, use_sg);
+}
+
+/*
+ * Read both Data and Control
+ *
+ * fromaddress counts data shorts, ignoring control:
+ * increasing it by 256 shifts the bytestream by 576 = 512+64 bytes;
+ * the last 8 bits are ignored.
+ *
+ * nr_of_pages counts pages of size (1 << pageshift) + (1 << controlshift).
+ */
+static int
+sddr09_read22(struct us_data *us, unsigned long fromaddress,
+ int nr_of_pages, int pageshift, unsigned char *buf, int use_sg) {
+
+ int bulklen = (nr_of_pages << pageshift) + (nr_of_pages << CONTROL_SHIFT);
+ usb_stor_dbg(us, "reading %d pages, %d bytes\n", nr_of_pages, bulklen);
+ return sddr09_readX(us, 2, fromaddress, nr_of_pages, bulklen,
+ buf, use_sg);
+}
+
+#if 0
+/*
+ * Read Pagewise Control
+ *
+ * fromaddress gives the starting position (as in read data;
+ * the last 8 bits are ignored); increasing it by 256 shifts
+ * the output stream by 64 bytes.
+ *
+ * count counts control groups of size (1 << controlshift).
+ * For me, controlshift = 6. Is this constant?
+ *
+ * After getting one control group, jump to the next page
+ * (fromaddress += 256).
+ */
+static int
+sddr09_read23(struct us_data *us, unsigned long fromaddress,
+ int count, int controlshift, unsigned char *buf, int use_sg) {
+
+ int bulklen = (count << controlshift);
+ return sddr09_readX(us, 3, fromaddress, count, bulklen,
+ buf, use_sg);
+}
+#endif
+
+/*
+ * Erase Command: 12 bytes.
+ * byte 0: opcode: EA
+ * bytes 6-9: erase address (big-endian, counting shorts, sector aligned).
+ *
+ * Always precisely one block is erased; bytes 2-5 and 10-11 are ignored.
+ * The byte address being erased is 2*Eaddress.
+ * The CIS cannot be erased.
+ */
+static int
+sddr09_erase(struct us_data *us, unsigned long Eaddress) {
+ unsigned char *command = us->iobuf;
+ int result;
+
+ usb_stor_dbg(us, "erase address %lu\n", Eaddress);
+
+ memset(command, 0, 12);
+ command[0] = 0xEA;
+ command[1] = LUNBITS;
+ command[6] = MSB_of(Eaddress>>16);
+ command[7] = LSB_of(Eaddress>>16);
+ command[8] = MSB_of(Eaddress & 0xFFFF);
+ command[9] = LSB_of(Eaddress & 0xFFFF);
+
+ result = sddr09_send_scsi_command(us, command, 12);
+
+ if (result)
+ usb_stor_dbg(us, "Result for send_control in sddr09_erase %d\n",
+ result);
+
+ return result;
+}
+
+/*
+ * Write CIS Command: 12 bytes.
+ * byte 0: opcode: EE
+ * bytes 2-5: write address in shorts
+ * bytes 10-11: sector count
+ *
+ * This writes at the indicated address. Don't know how it differs
+ * from E9. Maybe it does not erase? However, it will also write to
+ * the CIS.
+ *
+ * When two such commands on the same page follow each other directly,
+ * the second one is not done.
+ */
+
+/*
+ * Write Command: 12 bytes.
+ * byte 0: opcode: E9
+ * bytes 2-5: write address (big-endian, counting shorts, sector aligned).
+ * bytes 6-9: erase address (big-endian, counting shorts, sector aligned).
+ * bytes 10-11: sector count (big-endian, in 512-byte sectors).
+ *
+ * If write address equals erase address, the erase is done first,
+ * otherwise the write is done first. When erase address equals zero
+ * no erase is done?
+ */
+static int
+sddr09_writeX(struct us_data *us,
+ unsigned long Waddress, unsigned long Eaddress,
+ int nr_of_pages, int bulklen, unsigned char *buf, int use_sg) {
+
+ unsigned char *command = us->iobuf;
+ int result;
+
+ command[0] = 0xE9;
+ command[1] = LUNBITS;
+
+ command[2] = MSB_of(Waddress>>16);
+ command[3] = LSB_of(Waddress>>16);
+ command[4] = MSB_of(Waddress & 0xFFFF);
+ command[5] = LSB_of(Waddress & 0xFFFF);
+
+ command[6] = MSB_of(Eaddress>>16);
+ command[7] = LSB_of(Eaddress>>16);
+ command[8] = MSB_of(Eaddress & 0xFFFF);
+ command[9] = LSB_of(Eaddress & 0xFFFF);
+
+ command[10] = MSB_of(nr_of_pages);
+ command[11] = LSB_of(nr_of_pages);
+
+ result = sddr09_send_scsi_command(us, command, 12);
+
+ if (result) {
+ usb_stor_dbg(us, "Result for send_control in sddr09_writeX %d\n",
+ result);
+ return result;
+ }
+
+ result = usb_stor_bulk_transfer_sg(us, us->send_bulk_pipe,
+ buf, bulklen, use_sg, NULL);
+
+ if (result != USB_STOR_XFER_GOOD) {
+ usb_stor_dbg(us, "Result for bulk_transfer in sddr09_writeX %d\n",
+ result);
+ return -EIO;
+ }
+ return 0;
+}
+
+/* erase address, write same address */
+static int
+sddr09_write_inplace(struct us_data *us, unsigned long address,
+ int nr_of_pages, int pageshift, unsigned char *buf,
+ int use_sg) {
+ int bulklen = (nr_of_pages << pageshift) + (nr_of_pages << CONTROL_SHIFT);
+ return sddr09_writeX(us, address, address, nr_of_pages, bulklen,
+ buf, use_sg);
+}
+
+#if 0
+/*
+ * Read Scatter Gather Command: 3+4n bytes.
+ * byte 0: opcode E7
+ * byte 2: n
+ * bytes 4i-1,4i,4i+1: page address
+ * byte 4i+2: page count
+ * (i=1..n)
+ *
+ * This reads several pages from the card to a single memory buffer.
+ * The last two bits of byte 1 have the same meaning as for E8.
+ */
+static int
+sddr09_read_sg_test_only(struct us_data *us) {
+ unsigned char *command = us->iobuf;
+ int result, bulklen, nsg, ct;
+ unsigned char *buf;
+ unsigned long address;
+
+ nsg = bulklen = 0;
+ command[0] = 0xE7;
+ command[1] = LUNBITS;
+ command[2] = 0;
+ address = 040000; ct = 1;
+ nsg++;
+ bulklen += (ct << 9);
+ command[4*nsg+2] = ct;
+ command[4*nsg+1] = ((address >> 9) & 0xFF);
+ command[4*nsg+0] = ((address >> 17) & 0xFF);
+ command[4*nsg-1] = ((address >> 25) & 0xFF);
+
+ address = 0340000; ct = 1;
+ nsg++;
+ bulklen += (ct << 9);
+ command[4*nsg+2] = ct;
+ command[4*nsg+1] = ((address >> 9) & 0xFF);
+ command[4*nsg+0] = ((address >> 17) & 0xFF);
+ command[4*nsg-1] = ((address >> 25) & 0xFF);
+
+ address = 01000000; ct = 2;
+ nsg++;
+ bulklen += (ct << 9);
+ command[4*nsg+2] = ct;
+ command[4*nsg+1] = ((address >> 9) & 0xFF);
+ command[4*nsg+0] = ((address >> 17) & 0xFF);
+ command[4*nsg-1] = ((address >> 25) & 0xFF);
+
+ command[2] = nsg;
+
+ result = sddr09_send_scsi_command(us, command, 4*nsg+3);
+
+ if (result) {
+ usb_stor_dbg(us, "Result for send_control in sddr09_read_sg %d\n",
+ result);
+ return result;
+ }
+
+ buf = kmalloc(bulklen, GFP_NOIO);
+ if (!buf)
+ return -ENOMEM;
+
+ result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
+ buf, bulklen, NULL);
+ kfree(buf);
+ if (result != USB_STOR_XFER_GOOD) {
+ usb_stor_dbg(us, "Result for bulk_transfer in sddr09_read_sg %d\n",
+ result);
+ return -EIO;
+ }
+
+ return 0;
+}
+#endif
+
+/*
+ * Read Status Command: 12 bytes.
+ * byte 0: opcode: EC
+ *
+ * Returns 64 bytes, all zero except for the first.
+ * bit 0: 1: Error
+ * bit 5: 1: Suspended
+ * bit 6: 1: Ready
+ * bit 7: 1: Not write-protected
+ */
+
+static int
+sddr09_read_status(struct us_data *us, unsigned char *status) {
+
+ unsigned char *command = us->iobuf;
+ unsigned char *data = us->iobuf;
+ int result;
+
+ usb_stor_dbg(us, "Reading status...\n");
+
+ memset(command, 0, 12);
+ command[0] = 0xEC;
+ command[1] = LUNBITS;
+
+ result = sddr09_send_scsi_command(us, command, 12);
+ if (result)
+ return result;
+
+ result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
+ data, 64, NULL);
+ *status = data[0];
+ return (result == USB_STOR_XFER_GOOD ? 0 : -EIO);
+}
+
+static int
+sddr09_read_data(struct us_data *us,
+ unsigned long address,
+ unsigned int sectors) {
+
+ struct sddr09_card_info *info = (struct sddr09_card_info *) us->extra;
+ unsigned char *buffer;
+ unsigned int lba, maxlba, pba;
+ unsigned int page, pages;
+ unsigned int len, offset;
+ struct scatterlist *sg;
+ int result;
+
+ // Figure out the initial LBA and page
+ lba = address >> info->blockshift;
+ page = (address & info->blockmask);
+ maxlba = info->capacity >> (info->pageshift + info->blockshift);
+ if (lba >= maxlba)
+ return -EIO;
+
+ // 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(sectors, (unsigned int) info->blocksize) * info->pagesize;
+ buffer = kmalloc(len, GFP_NOIO);
+ if (buffer == NULL) {
+ printk(KERN_WARNING "sddr09_read_data: Out of memory\n");
+ return -ENOMEM;
+ }
+
+ // This could be made much more efficient by checking for
+ // contiguous LBA's. Another exercise left to the student.
+
+ result = 0;
+ offset = 0;
+ sg = NULL;
+
+ while (sectors > 0) {
+
+ /* Find number of pages we can read in this block */
+ pages = min(sectors, info->blocksize - page);
+ len = pages << info->pageshift;
+
+ /* Not overflowing capacity? */
+ if (lba >= maxlba) {
+ usb_stor_dbg(us, "Error: Requested lba %u exceeds maximum %u\n",
+ lba, maxlba);
+ result = -EIO;
+ break;
+ }
+
+ /* Find where this lba lives on disk */
+ pba = info->lba_to_pba[lba];
+
+ if (pba == UNDEF) { /* this lba was never written */
+
+ usb_stor_dbg(us, "Read %d zero pages (LBA %d) page %d\n",
+ pages, lba, page);
+
+ /* This is not really an error. It just means
+ that the block has never been written.
+ Instead of returning an error
+ it is better to return all zero data. */
+
+ memset(buffer, 0, len);
+
+ } else {
+ usb_stor_dbg(us, "Read %d pages, from PBA %d (LBA %d) page %d\n",
+ pages, pba, lba, page);
+
+ address = ((pba << info->blockshift) + page) <<
+ info->pageshift;
+
+ result = sddr09_read20(us, address>>1,
+ pages, info->pageshift, buffer, 0);
+ if (result)
+ break;
+ }
+
+ // 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;
+ }
+
+ kfree(buffer);
+ return result;
+}
+
+static unsigned int
+sddr09_find_unused_pba(struct sddr09_card_info *info, unsigned int lba) {
+ static unsigned int lastpba = 1;
+ int zonestart, end, i;
+
+ zonestart = (lba/1000) << 10;
+ end = info->capacity >> (info->blockshift + info->pageshift);
+ end -= zonestart;
+ if (end > 1024)
+ end = 1024;
+
+ for (i = lastpba+1; i < end; i++) {
+ if (info->pba_to_lba[zonestart+i] == UNDEF) {
+ lastpba = i;
+ return zonestart+i;
+ }
+ }
+ for (i = 0; i <= lastpba; i++) {
+ if (info->pba_to_lba[zonestart+i] == UNDEF) {
+ lastpba = i;
+ return zonestart+i;
+ }
+ }
+ return 0;
+}
+
+static int
+sddr09_write_lba(struct us_data *us, unsigned int lba,
+ unsigned int page, unsigned int pages,
+ unsigned char *ptr, unsigned char *blockbuffer) {
+
+ struct sddr09_card_info *info = (struct sddr09_card_info *) us->extra;
+ unsigned long address;
+ unsigned int pba, lbap;
+ unsigned int pagelen;
+ unsigned char *bptr, *cptr, *xptr;
+ unsigned char ecc[3];
+ int i, result, isnew;
+
+ lbap = ((lba % 1000) << 1) | 0x1000;
+ if (parity[MSB_of(lbap) ^ LSB_of(lbap)])
+ lbap ^= 1;
+ pba = info->lba_to_pba[lba];
+ isnew = 0;
+
+ if (pba == UNDEF) {
+ pba = sddr09_find_unused_pba(info, lba);
+ if (!pba) {
+ printk(KERN_WARNING
+ "sddr09_write_lba: Out of unused blocks\n");
+ return -ENOSPC;
+ }
+ info->pba_to_lba[pba] = lba;
+ info->lba_to_pba[lba] = pba;
+ isnew = 1;
+ }
+
+ if (pba == 1) {
+ /* Maybe it is impossible to write to PBA 1.
+ Fake success, but don't do anything. */
+ printk(KERN_WARNING "sddr09: avoid writing to pba 1\n");
+ return 0;
+ }
+
+ pagelen = (1 << info->pageshift) + (1 << CONTROL_SHIFT);
+
+ /* read old contents */
+ address = (pba << (info->pageshift + info->blockshift));
+ result = sddr09_read22(us, address>>1, info->blocksize,
+ info->pageshift, blockbuffer, 0);
+ if (result)
+ return result;
+
+ /* check old contents and fill lba */
+ for (i = 0; i < info->blocksize; i++) {
+ bptr = blockbuffer + i*pagelen;
+ cptr = bptr + info->pagesize;
+ nand_compute_ecc(bptr, ecc);
+ if (!nand_compare_ecc(cptr+13, ecc)) {
+ usb_stor_dbg(us, "Warning: bad ecc in page %d- of pba %d\n",
+ i, pba);
+ nand_store_ecc(cptr+13, ecc);
+ }
+ nand_compute_ecc(bptr+(info->pagesize / 2), ecc);
+ if (!nand_compare_ecc(cptr+8, ecc)) {
+ usb_stor_dbg(us, "Warning: bad ecc in page %d+ of pba %d\n",
+ i, pba);
+ nand_store_ecc(cptr+8, ecc);
+ }
+ cptr[6] = cptr[11] = MSB_of(lbap);
+ cptr[7] = cptr[12] = LSB_of(lbap);
+ }
+
+ /* copy in new stuff and compute ECC */
+ xptr = ptr;
+ for (i = page; i < page+pages; i++) {
+ bptr = blockbuffer + i*pagelen;
+ cptr = bptr + info->pagesize;
+ memcpy(bptr, xptr, info->pagesize);
+ xptr += info->pagesize;
+ nand_compute_ecc(bptr, ecc);
+ nand_store_ecc(cptr+13, ecc);
+ nand_compute_ecc(bptr+(info->pagesize / 2), ecc);
+ nand_store_ecc(cptr+8, ecc);
+ }
+
+ usb_stor_dbg(us, "Rewrite PBA %d (LBA %d)\n", pba, lba);
+
+ result = sddr09_write_inplace(us, address>>1, info->blocksize,
+ info->pageshift, blockbuffer, 0);
+
+ usb_stor_dbg(us, "sddr09_write_inplace returns %d\n", result);
+
+#if 0
+ {
+ unsigned char status = 0;
+ int result2 = sddr09_read_status(us, &status);
+ if (result2)
+ usb_stor_dbg(us, "cannot read status\n");
+ else if (status != 0xc0)
+ usb_stor_dbg(us, "status after write: 0x%x\n", status);
+ }
+#endif
+
+#if 0
+ {
+ int result2 = sddr09_test_unit_ready(us);
+ }
+#endif
+
+ return result;
+}
+
+static int
+sddr09_write_data(struct us_data *us,
+ unsigned long address,
+ unsigned int sectors) {
+
+ struct sddr09_card_info *info = (struct sddr09_card_info *) us->extra;
+ unsigned int lba, maxlba, page, pages;
+ unsigned int pagelen, blocklen;
+ unsigned char *blockbuffer;
+ unsigned char *buffer;
+ unsigned int len, offset;
+ struct scatterlist *sg;
+ int result;
+
+ // Figure out the initial LBA and page
+ lba = address >> info->blockshift;
+ page = (address & info->blockmask);
+ maxlba = info->capacity >> (info->pageshift + info->blockshift);
+ if (lba >= maxlba)
+ return -EIO;
+
+ // blockbuffer is used for reading in the old data, overwriting
+ // with the new data, and performing ECC calculations
+
+ /* TODO: instead of doing kmalloc/kfree for each write,
+ add a bufferpointer to the info structure */
+
+ pagelen = (1 << info->pageshift) + (1 << CONTROL_SHIFT);
+ blocklen = (pagelen << info->blockshift);
+ blockbuffer = kmalloc(blocklen, GFP_NOIO);
+ if (!blockbuffer) {
+ printk(KERN_WARNING "sddr09_write_data: Out of memory\n");
+ return -ENOMEM;
+ }
+
+ // Since we don't write the user data directly to the device,
+ // 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(sectors, (unsigned int) info->blocksize) * info->pagesize;
+ buffer = kmalloc(len, GFP_NOIO);
+ if (buffer == NULL) {
+ printk(KERN_WARNING "sddr09_write_data: Out of memory\n");
+ kfree(blockbuffer);
+ return -ENOMEM;
+ }
+
+ result = 0;
+ offset = 0;
+ sg = NULL;
+
+ while (sectors > 0) {
+
+ // Write as many sectors as possible in this block
+
+ pages = min(sectors, info->blocksize - page);
+ len = (pages << info->pageshift);
+
+ /* Not overflowing capacity? */
+ if (lba >= maxlba) {
+ usb_stor_dbg(us, "Error: Requested lba %u exceeds maximum %u\n",
+ lba, maxlba);
+ result = -EIO;
+ break;
+ }
+
+ // Get the data from the transfer buffer
+ usb_stor_access_xfer_buf(buffer, len, us->srb,
+ &sg, &offset, FROM_XFER_BUF);
+
+ result = sddr09_write_lba(us, lba, page, pages,
+ buffer, blockbuffer);
+ if (result)
+ break;
+
+ page = 0;
+ lba++;
+ sectors -= pages;
+ }
+
+ kfree(buffer);
+ kfree(blockbuffer);
+
+ return result;
+}
+
+static int
+sddr09_read_control(struct us_data *us,
+ unsigned long address,
+ unsigned int blocks,
+ unsigned char *content,
+ int use_sg) {
+
+ usb_stor_dbg(us, "Read control address %lu, blocks %d\n",
+ address, blocks);
+
+ return sddr09_read21(us, address, blocks,
+ CONTROL_SHIFT, content, use_sg);
+}
+
+/*
+ * Read Device ID Command: 12 bytes.
+ * byte 0: opcode: ED
+ *
+ * Returns 2 bytes: Manufacturer ID and Device ID.
+ * On more recent cards 3 bytes: the third byte is an option code A5
+ * signifying that the secret command to read an 128-bit ID is available.
+ * On still more recent cards 4 bytes: the fourth byte C0 means that
+ * a second read ID cmd is available.
+ */
+static int
+sddr09_read_deviceID(struct us_data *us, unsigned char *deviceID) {
+ unsigned char *command = us->iobuf;
+ unsigned char *content = us->iobuf;
+ int result, i;
+
+ memset(command, 0, 12);
+ command[0] = 0xED;
+ command[1] = LUNBITS;
+
+ result = sddr09_send_scsi_command(us, command, 12);
+ if (result)
+ return result;
+
+ result = usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
+ content, 64, NULL);
+
+ for (i = 0; i < 4; i++)
+ deviceID[i] = content[i];
+
+ return (result == USB_STOR_XFER_GOOD ? 0 : -EIO);
+}
+
+static int
+sddr09_get_wp(struct us_data *us, struct sddr09_card_info *info) {
+ int result;
+ unsigned char status;
+
+ result = sddr09_read_status(us, &status);
+ if (result) {
+ usb_stor_dbg(us, "read_status fails\n");
+ return result;
+ }
+ usb_stor_dbg(us, "status 0x%02X", status);
+ if ((status & 0x80) == 0) {
+ info->flags |= SDDR09_WP; /* write protected */
+ US_DEBUGPX(" WP");
+ }
+ if (status & 0x40)
+ US_DEBUGPX(" Ready");
+ if (status & LUNBITS)
+ US_DEBUGPX(" Suspended");
+ if (status & 0x1)
+ US_DEBUGPX(" Error");
+ US_DEBUGPX("\n");
+ return 0;
+}
+
+#if 0
+/*
+ * Reset Command: 12 bytes.
+ * byte 0: opcode: EB
+ */
+static int
+sddr09_reset(struct us_data *us) {
+
+ unsigned char *command = us->iobuf;
+
+ memset(command, 0, 12);
+ command[0] = 0xEB;
+ command[1] = LUNBITS;
+
+ return sddr09_send_scsi_command(us, command, 12);
+}
+#endif
+
+static struct nand_flash_dev *
+sddr09_get_cardinfo(struct us_data *us, unsigned char flags) {
+ struct nand_flash_dev *cardinfo;
+ unsigned char deviceID[4];
+ char blurbtxt[256];
+ int result;
+
+ usb_stor_dbg(us, "Reading capacity...\n");
+
+ result = sddr09_read_deviceID(us, deviceID);
+
+ if (result) {
+ usb_stor_dbg(us, "Result of read_deviceID is %d\n", result);
+ printk(KERN_WARNING "sddr09: could not read card info\n");
+ return NULL;
+ }
+
+ sprintf(blurbtxt, "sddr09: Found Flash card, ID = %4ph", deviceID);
+
+ /* Byte 0 is the manufacturer */
+ sprintf(blurbtxt + strlen(blurbtxt),
+ ": Manuf. %s",
+ nand_flash_manufacturer(deviceID[0]));
+
+ /* Byte 1 is the device type */
+ cardinfo = nand_find_id(deviceID[1]);
+ if (cardinfo) {
+ /* MB or MiB? It is neither. A 16 MB card has
+ 17301504 raw bytes, of which 16384000 are
+ usable for user data. */
+ sprintf(blurbtxt + strlen(blurbtxt),
+ ", %d MB", 1<<(cardinfo->chipshift - 20));
+ } else {
+ sprintf(blurbtxt + strlen(blurbtxt),
+ ", type unrecognized");
+ }
+
+ /* Byte 2 is code to signal availability of 128-bit ID */
+ if (deviceID[2] == 0xa5) {
+ sprintf(blurbtxt + strlen(blurbtxt),
+ ", 128-bit ID");
+ }
+
+ /* Byte 3 announces the availability of another read ID command */
+ if (deviceID[3] == 0xc0) {
+ sprintf(blurbtxt + strlen(blurbtxt),
+ ", extra cmd");
+ }
+
+ if (flags & SDDR09_WP)
+ sprintf(blurbtxt + strlen(blurbtxt),
+ ", WP");
+
+ printk(KERN_WARNING "%s\n", blurbtxt);
+
+ return cardinfo;
+}
+
+static int
+sddr09_read_map(struct us_data *us) {
+
+ struct sddr09_card_info *info = (struct sddr09_card_info *) us->extra;
+ int numblocks, alloc_len, alloc_blocks;
+ int i, j, result;
+ unsigned char *buffer, *buffer_end, *ptr;
+ unsigned int lba, lbact;
+
+ if (!info->capacity)
+ return -1;
+
+ // size of a block is 1 << (blockshift + pageshift) bytes
+ // divide into the total capacity to get the number of blocks
+
+ numblocks = info->capacity >> (info->blockshift + info->pageshift);
+
+ // read 64 bytes for every block (actually 1 << CONTROL_SHIFT)
+ // but only use a 64 KB buffer
+ // buffer size used must be a multiple of (1 << CONTROL_SHIFT)
+#define SDDR09_READ_MAP_BUFSZ 65536
+
+ alloc_blocks = min(numblocks, SDDR09_READ_MAP_BUFSZ >> CONTROL_SHIFT);
+ alloc_len = (alloc_blocks << CONTROL_SHIFT);
+ buffer = kmalloc(alloc_len, GFP_NOIO);
+ if (buffer == NULL) {
+ printk(KERN_WARNING "sddr09_read_map: out of memory\n");
+ result = -1;
+ goto done;
+ }
+ buffer_end = buffer + alloc_len;
+
+#undef SDDR09_READ_MAP_BUFSZ
+
+ 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) {
+ printk(KERN_WARNING "sddr09_read_map: out of memory\n");
+ result = -1;
+ goto done;
+ }
+
+ for (i = 0; i < numblocks; i++)
+ info->lba_to_pba[i] = info->pba_to_lba[i] = UNDEF;
+
+ /*
+ * Define lba-pba translation table
+ */
+
+ ptr = buffer_end;
+ for (i = 0; i < numblocks; i++) {
+ ptr += (1 << CONTROL_SHIFT);
+ if (ptr >= buffer_end) {
+ unsigned long address;
+
+ address = i << (info->pageshift + info->blockshift);
+ result = sddr09_read_control(
+ us, address>>1,
+ min(alloc_blocks, numblocks - i),
+ buffer, 0);
+ if (result) {
+ result = -1;
+ goto done;
+ }
+ ptr = buffer;
+ }
+
+ if (i == 0 || i == 1) {
+ info->pba_to_lba[i] = UNUSABLE;
+ continue;
+ }
+
+ /* special PBAs have control field 0^16 */
+ for (j = 0; j < 16; j++)
+ if (ptr[j] != 0)
+ goto nonz;
+ info->pba_to_lba[i] = UNUSABLE;
+ printk(KERN_WARNING "sddr09: PBA %d has no logical mapping\n",
+ i);
+ continue;
+
+ nonz:
+ /* unwritten PBAs have control field FF^16 */
+ for (j = 0; j < 16; j++)
+ if (ptr[j] != 0xff)
+ goto nonff;
+ continue;
+
+ nonff:
+ /* normal PBAs start with six FFs */
+ if (j < 6) {
+ printk(KERN_WARNING
+ "sddr09: PBA %d has no logical mapping: "
+ "reserved area = %02X%02X%02X%02X "
+ "data status %02X block status %02X\n",
+ i, ptr[0], ptr[1], ptr[2], ptr[3],
+ ptr[4], ptr[5]);
+ info->pba_to_lba[i] = UNUSABLE;
+ continue;
+ }
+
+ if ((ptr[6] >> 4) != 0x01) {
+ printk(KERN_WARNING
+ "sddr09: PBA %d has invalid address field "
+ "%02X%02X/%02X%02X\n",
+ i, ptr[6], ptr[7], ptr[11], ptr[12]);
+ info->pba_to_lba[i] = UNUSABLE;
+ continue;
+ }
+
+ /* check even parity */
+ if (parity[ptr[6] ^ ptr[7]]) {
+ printk(KERN_WARNING
+ "sddr09: Bad parity in LBA for block %d"
+ " (%02X %02X)\n", i, ptr[6], ptr[7]);
+ info->pba_to_lba[i] = UNUSABLE;
+ continue;
+ }
+
+ lba = short_pack(ptr[7], ptr[6]);
+ lba = (lba & 0x07FF) >> 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. This allows for 24 bad
+ * or special physical blocks per zone.
+ */
+
+ if (lba >= 1000) {
+ printk(KERN_WARNING
+ "sddr09: Bad low LBA %d for block %d\n",
+ lba, i);
+ goto possibly_erase;
+ }
+
+ lba += 1000*(i/0x400);
+
+ if (info->lba_to_pba[lba] != UNDEF) {
+ printk(KERN_WARNING
+ "sddr09: LBA %d seen for PBA %d and %d\n",
+ lba, info->lba_to_pba[lba], i);
+ goto possibly_erase;
+ }
+
+ info->pba_to_lba[i] = lba;
+ info->lba_to_pba[lba] = i;
+ continue;
+
+ possibly_erase:
+ if (erase_bad_lba_entries) {
+ unsigned long address;
+
+ address = (i << (info->pageshift + info->blockshift));
+ sddr09_erase(us, address>>1);
+ info->pba_to_lba[i] = UNDEF;
+ } else
+ info->pba_to_lba[i] = UNUSABLE;
+ }
+
+ /*
+ * Approximate capacity. This is not entirely correct yet,
+ * since a zone with less than 1000 usable pages leads to
+ * missing LBAs. Especially if it is the last zone, some
+ * LBAs can be past capacity.
+ */
+ lbact = 0;
+ for (i = 0; i < numblocks; i += 1024) {
+ int ct = 0;
+
+ for (j = 0; j < 1024 && i+j < numblocks; j++) {
+ if (info->pba_to_lba[i+j] != UNUSABLE) {
+ if (ct >= 1000)
+ info->pba_to_lba[i+j] = SPARE;
+ else
+ ct++;
+ }
+ }
+ lbact += ct;
+ }
+ info->lbact = lbact;
+ usb_stor_dbg(us, "Found %d LBA's\n", lbact);
+ result = 0;
+
+ done:
+ if (result != 0) {
+ kfree(info->lba_to_pba);
+ kfree(info->pba_to_lba);
+ info->lba_to_pba = NULL;
+ info->pba_to_lba = NULL;
+ }
+ kfree(buffer);
+ return result;
+}
+
+static void
+sddr09_card_info_destructor(void *extra) {
+ struct sddr09_card_info *info = (struct sddr09_card_info *)extra;
+
+ if (!info)
+ return;
+
+ kfree(info->lba_to_pba);
+ kfree(info->pba_to_lba);
+}
+
+static int
+sddr09_common_init(struct us_data *us) {
+ int result;
+
+ /* set the configuration -- STALL is an acceptable response here */
+ if (us->pusb_dev->actconfig->desc.bConfigurationValue != 1) {
+ usb_stor_dbg(us, "active config #%d != 1 ??\n",
+ us->pusb_dev->actconfig->desc.bConfigurationValue);
+ return -EINVAL;
+ }
+
+ result = usb_reset_configuration(us->pusb_dev);
+ usb_stor_dbg(us, "Result of usb_reset_configuration is %d\n", result);
+ if (result == -EPIPE) {
+ usb_stor_dbg(us, "-- stall on control interface\n");
+ } else if (result != 0) {
+ /* it's not a stall, but another error -- time to bail */
+ usb_stor_dbg(us, "-- Unknown error. Rejecting device\n");
+ return -EINVAL;
+ }
+
+ us->extra = kzalloc(sizeof(struct sddr09_card_info), GFP_NOIO);
+ if (!us->extra)
+ return -ENOMEM;
+ us->extra_destructor = sddr09_card_info_destructor;
+
+ nand_init_ecc();
+ return 0;
+}
+
+
+/*
+ * This is needed at a very early stage. If this is not listed in the
+ * unusual devices list but called from here then LUN 0 of the combo reader
+ * is not recognized. But I do not know what precisely these calls do.
+ */
+static int
+usb_stor_sddr09_dpcm_init(struct us_data *us) {
+ int result;
+ unsigned char *data = us->iobuf;
+
+ result = sddr09_common_init(us);
+ if (result)
+ return result;
+
+ result = sddr09_send_command(us, 0x01, USB_DIR_IN, data, 2);
+ if (result) {
+ usb_stor_dbg(us, "send_command fails\n");
+ return result;
+ }
+
+ usb_stor_dbg(us, "%02X %02X\n", data[0], data[1]);
+ // get 07 02
+
+ result = sddr09_send_command(us, 0x08, USB_DIR_IN, data, 2);
+ if (result) {
+ usb_stor_dbg(us, "2nd send_command fails\n");
+ return result;
+ }
+
+ usb_stor_dbg(us, "%02X %02X\n", data[0], data[1]);
+ // get 07 00
+
+ result = sddr09_request_sense(us, data, 18);
+ if (result == 0 && data[2] != 0) {
+ int j;
+ for (j=0; j<18; j++)
+ printk(" %02X", data[j]);
+ printk("\n");
+ // get 70 00 00 00 00 00 00 * 00 00 00 00 00 00
+ // 70: current command
+ // sense key 0, sense code 0, extd sense code 0
+ // additional transfer length * = sizeof(data) - 7
+ // Or: 70 00 06 00 00 00 00 0b 00 00 00 00 28 00 00 00 00 00
+ // sense key 06, sense code 28: unit attention,
+ // not ready to ready transition
+ }
+
+ // test unit ready
+
+ return 0; /* not result */
+}
+
+/*
+ * Transport for the Microtech DPCM-USB
+ */
+static int dpcm_transport(struct scsi_cmnd *srb, struct us_data *us)
+{
+ int ret;
+
+ usb_stor_dbg(us, "LUN=%d\n", (u8)srb->device->lun);
+
+ switch (srb->device->lun) {
+ case 0:
+
+ /*
+ * LUN 0 corresponds to the CompactFlash card reader.
+ */
+ ret = usb_stor_CB_transport(srb, us);
+ break;
+
+ case 1:
+
+ /*
+ * LUN 1 corresponds to the SmartMedia card reader.
+ */
+
+ /*
+ * Set the LUN to 0 (just in case).
+ */
+ srb->device->lun = 0;
+ ret = sddr09_transport(srb, us);
+ srb->device->lun = 1;
+ break;
+
+ default:
+ usb_stor_dbg(us, "Invalid LUN %d\n", (u8)srb->device->lun);
+ ret = USB_STOR_TRANSPORT_ERROR;
+ break;
+ }
+ return ret;
+}
+
+
+/*
+ * Transport for the Sandisk SDDR-09
+ */
+static int sddr09_transport(struct scsi_cmnd *srb, struct us_data *us)
+{
+ static unsigned char sensekey = 0, sensecode = 0;
+ static unsigned char havefakesense = 0;
+ int result, i;
+ unsigned char *ptr = us->iobuf;
+ unsigned long capacity;
+ unsigned int page, pages;
+
+ struct sddr09_card_info *info;
+
+ static unsigned char inquiry_response[8] = {
+ 0x00, 0x80, 0x00, 0x02, 0x1F, 0x00, 0x00, 0x00
+ };
+
+ /* note: no block descriptor support */
+ static unsigned char mode_page_01[19] = {
+ 0x00, 0x0F, 0x00, 0x0, 0x0, 0x0, 0x00,
+ 0x01, 0x0A,
+ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
+ };
+
+ info = (struct sddr09_card_info *)us->extra;
+
+ if (srb->cmnd[0] == REQUEST_SENSE && havefakesense) {
+ /* for a faked command, we have to follow with a faked sense */
+ memset(ptr, 0, 18);
+ ptr[0] = 0x70;
+ ptr[2] = sensekey;
+ ptr[7] = 11;
+ ptr[12] = sensecode;
+ usb_stor_set_xfer_buf(ptr, 18, srb);
+ sensekey = sensecode = havefakesense = 0;
+ return USB_STOR_TRANSPORT_GOOD;
+ }
+
+ havefakesense = 1;
+
+ /* Dummy up a response for INQUIRY since SDDR09 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;
+ }
+
+ if (srb->cmnd[0] == READ_CAPACITY) {
+ struct nand_flash_dev *cardinfo;
+
+ sddr09_get_wp(us, info); /* read WP bit */
+
+ cardinfo = sddr09_get_cardinfo(us, info->flags);
+ if (!cardinfo) {
+ /* probably no media */
+ init_error:
+ sensekey = 0x02; /* not ready */
+ sensecode = 0x3a; /* medium not present */
+ return USB_STOR_TRANSPORT_FAILED;
+ }
+
+ info->capacity = (1 << cardinfo->chipshift);
+ info->pageshift = cardinfo->pageshift;
+ info->pagesize = (1 << info->pageshift);
+ info->blockshift = cardinfo->blockshift;
+ info->blocksize = (1 << info->blockshift);
+ info->blockmask = info->blocksize - 1;
+
+ // map initialization, must follow get_cardinfo()
+ if (sddr09_read_map(us)) {
+ /* probably out of memory */
+ goto init_error;
+ }
+
+ // Report capacity
+
+ capacity = (info->lbact << info->blockshift) - 1;
+
+ ((__be32 *) ptr)[0] = cpu_to_be32(capacity);
+
+ // Report page size
+
+ ((__be32 *) ptr)[1] = cpu_to_be32(info->pagesize);
+ usb_stor_set_xfer_buf(ptr, 8, srb);
+
+ return USB_STOR_TRANSPORT_GOOD;
+ }
+
+ if (srb->cmnd[0] == MODE_SENSE_10) {
+ int modepage = (srb->cmnd[2] & 0x3F);
+
+ /* They ask for the Read/Write error recovery page,
+ or for all pages. */
+ /* %% We should check DBD %% */
+ if (modepage == 0x01 || modepage == 0x3F) {
+ usb_stor_dbg(us, "Dummy up request for mode page 0x%x\n",
+ modepage);
+
+ memcpy(ptr, mode_page_01, sizeof(mode_page_01));
+ ((__be16*)ptr)[0] = cpu_to_be16(sizeof(mode_page_01) - 2);
+ ptr[3] = (info->flags & SDDR09_WP) ? 0x80 : 0;
+ usb_stor_set_xfer_buf(ptr, sizeof(mode_page_01), srb);
+ return USB_STOR_TRANSPORT_GOOD;
+ }
+
+ sensekey = 0x05; /* illegal request */
+ sensecode = 0x24; /* invalid field in CDB */
+ return USB_STOR_TRANSPORT_FAILED;
+ }
+
+ if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL)
+ return USB_STOR_TRANSPORT_GOOD;
+
+ havefakesense = 0;
+
+ if (srb->cmnd[0] == READ_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]);
+
+ usb_stor_dbg(us, "READ_10: read page %d pagect %d\n",
+ page, pages);
+
+ result = sddr09_read_data(us, page, pages);
+ return (result == 0 ? USB_STOR_TRANSPORT_GOOD :
+ USB_STOR_TRANSPORT_ERROR);
+ }
+
+ if (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]);
+
+ usb_stor_dbg(us, "WRITE_10: write page %d pagect %d\n",
+ page, pages);
+
+ result = sddr09_write_data(us, page, pages);
+ return (result == 0 ? USB_STOR_TRANSPORT_GOOD :
+ USB_STOR_TRANSPORT_ERROR);
+ }
+
+ /* catch-all for all other commands, except
+ * pass TEST_UNIT_READY and REQUEST_SENSE through
+ */
+ if (srb->cmnd[0] != TEST_UNIT_READY &&
+ srb->cmnd[0] != REQUEST_SENSE) {
+ sensekey = 0x05; /* illegal request */
+ sensecode = 0x20; /* invalid command */
+ havefakesense = 1;
+ return USB_STOR_TRANSPORT_FAILED;
+ }
+
+ for (; srb->cmd_len<12; srb->cmd_len++)
+ srb->cmnd[srb->cmd_len] = 0;
+
+ srb->cmnd[1] = LUNBITS;
+
+ ptr[0] = 0;
+ for (i=0; i<12; i++)
+ sprintf(ptr+strlen(ptr), "%02X ", srb->cmnd[i]);
+
+ usb_stor_dbg(us, "Send control for command %s\n", ptr);
+
+ result = sddr09_send_scsi_command(us, srb->cmnd, 12);
+ if (result) {
+ usb_stor_dbg(us, "sddr09_send_scsi_command returns %d\n",
+ result);
+ return USB_STOR_TRANSPORT_ERROR;
+ }
+
+ if (scsi_bufflen(srb) == 0)
+ return USB_STOR_TRANSPORT_GOOD;
+
+ if (srb->sc_data_direction == DMA_TO_DEVICE ||
+ srb->sc_data_direction == DMA_FROM_DEVICE) {
+ unsigned int pipe = (srb->sc_data_direction == DMA_TO_DEVICE)
+ ? us->send_bulk_pipe : us->recv_bulk_pipe;
+
+ usb_stor_dbg(us, "%s %d bytes\n",
+ (srb->sc_data_direction == DMA_TO_DEVICE) ?
+ "sending" : "receiving",
+ scsi_bufflen(srb));
+
+ result = usb_stor_bulk_srb(us, pipe, srb);
+
+ return (result == USB_STOR_XFER_GOOD ?
+ USB_STOR_TRANSPORT_GOOD : USB_STOR_TRANSPORT_ERROR);
+ }
+
+ return USB_STOR_TRANSPORT_GOOD;
+}
+
+/*
+ * Initialization routine for the sddr09 subdriver
+ */
+static int
+usb_stor_sddr09_init(struct us_data *us) {
+ return sddr09_common_init(us);
+}
+
+static int sddr09_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 - sddr09_usb_ids) + sddr09_unusual_dev_list);
+ if (result)
+ return result;
+
+ if (us->protocol == USB_PR_DPCM_USB) {
+ us->transport_name = "Control/Bulk-EUSB/SDDR09";
+ us->transport = dpcm_transport;
+ us->transport_reset = usb_stor_CB_reset;
+ us->max_lun = 1;
+ } else {
+ us->transport_name = "EUSB/SDDR09";
+ us->transport = sddr09_transport;
+ us->transport_reset = usb_stor_CB_reset;
+ us->max_lun = 0;
+ }
+
+ result = usb_stor_probe2(us);
+ return result;
+}
+
+static struct usb_driver sddr09_driver = {
+ .name = "ums-sddr09",
+ .probe = sddr09_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 = sddr09_usb_ids,
+ .soft_unbind = 1,
+ .no_dynamic_id = 1,
+};
+
+module_usb_driver(sddr09_driver);
Code Review / kvmfornfv.git / blobdiff