--- /dev/null
+/* Driver for Datafab USB Compact Flash reader
+ *
+ * datafab driver v0.1:
+ *
+ * First release
+ *
+ * Current development and maintenance by:
+ * (c) 2000 Jimmie Mayfield (mayfield+datafab@sackheads.org)
+ *
+ * Many thanks to Robert Baruch for the SanDisk SmartMedia reader driver
+ * which I used as a template for this driver.
+ *
+ * Some bugfixes and scatter-gather code by Gregory P. Smith
+ * (greg-usb@electricrain.com)
+ *
+ * Fix for media change by Joerg Schneider (js@joergschneider.com)
+ *
+ * Other contributors:
+ * (c) 2002 Alan Stern <stern@rowland.org>
+ *
+ * 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.
+ */
+
+/*
+ * This driver attempts to support USB CompactFlash reader/writer devices
+ * based on Datafab USB-to-ATA chips. It was specifically developed for the
+ * Datafab MDCFE-B USB CompactFlash reader but has since been found to work
+ * with a variety of Datafab-based devices from a number of manufacturers.
+ * I've received a report of this driver working with a Datafab-based
+ * SmartMedia device though please be aware that I'm personally unable to
+ * test SmartMedia support.
+ *
+ * This driver supports reading and writing. If you're truly paranoid,
+ * however, you can force the driver into a write-protected state by setting
+ * the WP enable bits in datafab_handle_mode_sense(). See the comments
+ * in that routine.
+ */
+
+#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 Datafab USB Compact Flash reader");
+MODULE_AUTHOR("Jimmie Mayfield <mayfield+datafab@sackheads.org>");
+MODULE_LICENSE("GPL");
+
+struct datafab_info {
+ unsigned long sectors; /* total sector count */
+ unsigned long ssize; /* sector size in bytes */
+ signed char lun; /* used for dual-slot readers */
+
+ /* the following aren't used yet */
+ unsigned char sense_key;
+ unsigned long sense_asc; /* additional sense code */
+ unsigned long sense_ascq; /* additional sense code qualifier */
+};
+
+static int datafab_determine_lun(struct us_data *us,
+ struct datafab_info *info);
+
+
+/*
+ * 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 datafab_usb_ids[] = {
+# include "unusual_datafab.h"
+ { } /* Terminating entry */
+};
+MODULE_DEVICE_TABLE(usb, datafab_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 datafab_unusual_dev_list[] = {
+# include "unusual_datafab.h"
+ { } /* Terminating entry */
+};
+
+#undef UNUSUAL_DEV
+
+
+static inline int
+datafab_bulk_read(struct us_data *us, unsigned char *data, unsigned int len) {
+ if (len == 0)
+ return USB_STOR_XFER_GOOD;
+
+ usb_stor_dbg(us, "len = %d\n", len);
+ return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
+ data, len, NULL);
+}
+
+
+static inline int
+datafab_bulk_write(struct us_data *us, unsigned char *data, unsigned int len) {
+ if (len == 0)
+ return USB_STOR_XFER_GOOD;
+
+ usb_stor_dbg(us, "len = %d\n", len);
+ return usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
+ data, len, NULL);
+}
+
+
+static int datafab_read_data(struct us_data *us,
+ struct datafab_info *info,
+ u32 sector,
+ u32 sectors)
+{
+ unsigned char *command = us->iobuf;
+ unsigned char *buffer;
+ unsigned char thistime;
+ unsigned int totallen, alloclen;
+ int len, result;
+ unsigned int sg_offset = 0;
+ struct scatterlist *sg = NULL;
+
+ // we're working in LBA mode. according to the ATA spec,
+ // we can support up to 28-bit addressing. I don't know if Datafab
+ // supports beyond 24-bit addressing. It's kind of hard to test
+ // since it requires > 8GB CF card.
+ //
+ if (sectors > 0x0FFFFFFF)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ if (info->lun == -1) {
+ result = datafab_determine_lun(us, info);
+ if (result != USB_STOR_TRANSPORT_GOOD)
+ return result;
+ }
+
+ totallen = sectors * info->ssize;
+
+ // Since we don't read more than 64 KB 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.
+
+ alloclen = min(totallen, 65536u);
+ buffer = kmalloc(alloclen, GFP_NOIO);
+ if (buffer == NULL)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ do {
+ // loop, never allocate or transfer more than 64k at once
+ // (min(128k, 255*info->ssize) is the real limit)
+
+ len = min(totallen, alloclen);
+ thistime = (len / info->ssize) & 0xff;
+
+ command[0] = 0;
+ command[1] = thistime;
+ command[2] = sector & 0xFF;
+ command[3] = (sector >> 8) & 0xFF;
+ command[4] = (sector >> 16) & 0xFF;
+
+ command[5] = 0xE0 + (info->lun << 4);
+ command[5] |= (sector >> 24) & 0x0F;
+ command[6] = 0x20;
+ command[7] = 0x01;
+
+ // send the read command
+ result = datafab_bulk_write(us, command, 8);
+ if (result != USB_STOR_XFER_GOOD)
+ goto leave;
+
+ // read the result
+ result = datafab_bulk_read(us, buffer, len);
+ if (result != USB_STOR_XFER_GOOD)
+ goto leave;
+
+ // Store the data in the transfer buffer
+ usb_stor_access_xfer_buf(buffer, len, us->srb,
+ &sg, &sg_offset, TO_XFER_BUF);
+
+ sector += thistime;
+ totallen -= len;
+ } while (totallen > 0);
+
+ kfree(buffer);
+ return USB_STOR_TRANSPORT_GOOD;
+
+ leave:
+ kfree(buffer);
+ return USB_STOR_TRANSPORT_ERROR;
+}
+
+
+static int datafab_write_data(struct us_data *us,
+ struct datafab_info *info,
+ u32 sector,
+ u32 sectors)
+{
+ unsigned char *command = us->iobuf;
+ unsigned char *reply = us->iobuf;
+ unsigned char *buffer;
+ unsigned char thistime;
+ unsigned int totallen, alloclen;
+ int len, result;
+ unsigned int sg_offset = 0;
+ struct scatterlist *sg = NULL;
+
+ // we're working in LBA mode. according to the ATA spec,
+ // we can support up to 28-bit addressing. I don't know if Datafab
+ // supports beyond 24-bit addressing. It's kind of hard to test
+ // since it requires > 8GB CF card.
+ //
+ if (sectors > 0x0FFFFFFF)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ if (info->lun == -1) {
+ result = datafab_determine_lun(us, info);
+ if (result != USB_STOR_TRANSPORT_GOOD)
+ return result;
+ }
+
+ totallen = sectors * info->ssize;
+
+ // Since we don't write more than 64 KB 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.
+
+ alloclen = min(totallen, 65536u);
+ buffer = kmalloc(alloclen, GFP_NOIO);
+ if (buffer == NULL)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ do {
+ // loop, never allocate or transfer more than 64k at once
+ // (min(128k, 255*info->ssize) is the real limit)
+
+ len = min(totallen, alloclen);
+ thistime = (len / info->ssize) & 0xff;
+
+ // Get the data from the transfer buffer
+ usb_stor_access_xfer_buf(buffer, len, us->srb,
+ &sg, &sg_offset, FROM_XFER_BUF);
+
+ command[0] = 0;
+ command[1] = thistime;
+ command[2] = sector & 0xFF;
+ command[3] = (sector >> 8) & 0xFF;
+ command[4] = (sector >> 16) & 0xFF;
+
+ command[5] = 0xE0 + (info->lun << 4);
+ command[5] |= (sector >> 24) & 0x0F;
+ command[6] = 0x30;
+ command[7] = 0x02;
+
+ // send the command
+ result = datafab_bulk_write(us, command, 8);
+ if (result != USB_STOR_XFER_GOOD)
+ goto leave;
+
+ // send the data
+ result = datafab_bulk_write(us, buffer, len);
+ if (result != USB_STOR_XFER_GOOD)
+ goto leave;
+
+ // read the result
+ result = datafab_bulk_read(us, reply, 2);
+ if (result != USB_STOR_XFER_GOOD)
+ goto leave;
+
+ if (reply[0] != 0x50 && reply[1] != 0) {
+ usb_stor_dbg(us, "Gah! write return code: %02x %02x\n",
+ reply[0], reply[1]);
+ result = USB_STOR_TRANSPORT_ERROR;
+ goto leave;
+ }
+
+ sector += thistime;
+ totallen -= len;
+ } while (totallen > 0);
+
+ kfree(buffer);
+ return USB_STOR_TRANSPORT_GOOD;
+
+ leave:
+ kfree(buffer);
+ return USB_STOR_TRANSPORT_ERROR;
+}
+
+
+static int datafab_determine_lun(struct us_data *us,
+ struct datafab_info *info)
+{
+ // Dual-slot readers can be thought of as dual-LUN devices.
+ // We need to determine which card slot is being used.
+ // We'll send an IDENTIFY DEVICE command and see which LUN responds...
+ //
+ // There might be a better way of doing this?
+
+ static unsigned char scommand[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 };
+ unsigned char *command = us->iobuf;
+ unsigned char *buf;
+ int count = 0, rc;
+
+ if (!info)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ memcpy(command, scommand, 8);
+ buf = kmalloc(512, GFP_NOIO);
+ if (!buf)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ usb_stor_dbg(us, "locating...\n");
+
+ // we'll try 3 times before giving up...
+ //
+ while (count++ < 3) {
+ command[5] = 0xa0;
+
+ rc = datafab_bulk_write(us, command, 8);
+ if (rc != USB_STOR_XFER_GOOD) {
+ rc = USB_STOR_TRANSPORT_ERROR;
+ goto leave;
+ }
+
+ rc = datafab_bulk_read(us, buf, 512);
+ if (rc == USB_STOR_XFER_GOOD) {
+ info->lun = 0;
+ rc = USB_STOR_TRANSPORT_GOOD;
+ goto leave;
+ }
+
+ command[5] = 0xb0;
+
+ rc = datafab_bulk_write(us, command, 8);
+ if (rc != USB_STOR_XFER_GOOD) {
+ rc = USB_STOR_TRANSPORT_ERROR;
+ goto leave;
+ }
+
+ rc = datafab_bulk_read(us, buf, 512);
+ if (rc == USB_STOR_XFER_GOOD) {
+ info->lun = 1;
+ rc = USB_STOR_TRANSPORT_GOOD;
+ goto leave;
+ }
+
+ msleep(20);
+ }
+
+ rc = USB_STOR_TRANSPORT_ERROR;
+
+ leave:
+ kfree(buf);
+ return rc;
+}
+
+static int datafab_id_device(struct us_data *us,
+ struct datafab_info *info)
+{
+ // this is a variation of the ATA "IDENTIFY DEVICE" command...according
+ // to the ATA spec, 'Sector Count' isn't used but the Windows driver
+ // sets this bit so we do too...
+ //
+ static unsigned char scommand[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 };
+ unsigned char *command = us->iobuf;
+ unsigned char *reply;
+ int rc;
+
+ if (!info)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ if (info->lun == -1) {
+ rc = datafab_determine_lun(us, info);
+ if (rc != USB_STOR_TRANSPORT_GOOD)
+ return rc;
+ }
+
+ memcpy(command, scommand, 8);
+ reply = kmalloc(512, GFP_NOIO);
+ if (!reply)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ command[5] += (info->lun << 4);
+
+ rc = datafab_bulk_write(us, command, 8);
+ if (rc != USB_STOR_XFER_GOOD) {
+ rc = USB_STOR_TRANSPORT_ERROR;
+ goto leave;
+ }
+
+ // we'll go ahead and extract the media capacity while we're here...
+ //
+ rc = datafab_bulk_read(us, reply, 512);
+ if (rc == USB_STOR_XFER_GOOD) {
+ // capacity is at word offset 57-58
+ //
+ info->sectors = ((u32)(reply[117]) << 24) |
+ ((u32)(reply[116]) << 16) |
+ ((u32)(reply[115]) << 8) |
+ ((u32)(reply[114]) );
+ rc = USB_STOR_TRANSPORT_GOOD;
+ goto leave;
+ }
+
+ rc = USB_STOR_TRANSPORT_ERROR;
+
+ leave:
+ kfree(reply);
+ return rc;
+}
+
+
+static int datafab_handle_mode_sense(struct us_data *us,
+ struct scsi_cmnd * srb,
+ int sense_6)
+{
+ static unsigned char rw_err_page[12] = {
+ 0x1, 0xA, 0x21, 1, 0, 0, 0, 0, 1, 0, 0, 0
+ };
+ static unsigned char cache_page[12] = {
+ 0x8, 0xA, 0x1, 0, 0, 0, 0, 0, 0, 0, 0, 0
+ };
+ static unsigned char rbac_page[12] = {
+ 0x1B, 0xA, 0, 0x81, 0, 0, 0, 0, 0, 0, 0, 0
+ };
+ static unsigned char timer_page[8] = {
+ 0x1C, 0x6, 0, 0, 0, 0
+ };
+ unsigned char pc, page_code;
+ unsigned int i = 0;
+ struct datafab_info *info = (struct datafab_info *) (us->extra);
+ unsigned char *ptr = us->iobuf;
+
+ // most of this stuff is just a hack to get things working. the
+ // datafab reader doesn't present a SCSI interface so we
+ // fudge the SCSI commands...
+ //
+
+ pc = srb->cmnd[2] >> 6;
+ page_code = srb->cmnd[2] & 0x3F;
+
+ switch (pc) {
+ case 0x0:
+ usb_stor_dbg(us, "Current values\n");
+ break;
+ case 0x1:
+ usb_stor_dbg(us, "Changeable values\n");
+ break;
+ case 0x2:
+ usb_stor_dbg(us, "Default values\n");
+ break;
+ case 0x3:
+ usb_stor_dbg(us, "Saves values\n");
+ break;
+ }
+
+ memset(ptr, 0, 8);
+ if (sense_6) {
+ ptr[2] = 0x00; // WP enable: 0x80
+ i = 4;
+ } else {
+ ptr[3] = 0x00; // WP enable: 0x80
+ i = 8;
+ }
+
+ switch (page_code) {
+ default:
+ // vendor-specific mode
+ info->sense_key = 0x05;
+ info->sense_asc = 0x24;
+ info->sense_ascq = 0x00;
+ return USB_STOR_TRANSPORT_FAILED;
+
+ case 0x1:
+ memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
+ i += sizeof(rw_err_page);
+ break;
+
+ case 0x8:
+ memcpy(ptr + i, cache_page, sizeof(cache_page));
+ i += sizeof(cache_page);
+ break;
+
+ case 0x1B:
+ memcpy(ptr + i, rbac_page, sizeof(rbac_page));
+ i += sizeof(rbac_page);
+ break;
+
+ case 0x1C:
+ memcpy(ptr + i, timer_page, sizeof(timer_page));
+ i += sizeof(timer_page);
+ break;
+
+ case 0x3F: // retrieve all pages
+ memcpy(ptr + i, timer_page, sizeof(timer_page));
+ i += sizeof(timer_page);
+ memcpy(ptr + i, rbac_page, sizeof(rbac_page));
+ i += sizeof(rbac_page);
+ memcpy(ptr + i, cache_page, sizeof(cache_page));
+ i += sizeof(cache_page);
+ memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
+ i += sizeof(rw_err_page);
+ break;
+ }
+
+ if (sense_6)
+ ptr[0] = i - 1;
+ else
+ ((__be16 *) ptr)[0] = cpu_to_be16(i - 2);
+ usb_stor_set_xfer_buf(ptr, i, srb);
+
+ return USB_STOR_TRANSPORT_GOOD;
+}
+
+static void datafab_info_destructor(void *extra)
+{
+ // this routine is a placeholder...
+ // currently, we don't allocate any extra memory so we're okay
+}
+
+
+// Transport for the Datafab MDCFE-B
+//
+static int datafab_transport(struct scsi_cmnd *srb, struct us_data *us)
+{
+ struct datafab_info *info;
+ int rc;
+ unsigned long block, blocks;
+ unsigned char *ptr = us->iobuf;
+ static unsigned char inquiry_reply[8] = {
+ 0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00
+ };
+
+ if (!us->extra) {
+ us->extra = kzalloc(sizeof(struct datafab_info), GFP_NOIO);
+ if (!us->extra)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ us->extra_destructor = datafab_info_destructor;
+ ((struct datafab_info *)us->extra)->lun = -1;
+ }
+
+ info = (struct datafab_info *) (us->extra);
+
+ if (srb->cmnd[0] == INQUIRY) {
+ usb_stor_dbg(us, "INQUIRY - Returning bogus response\n");
+ memcpy(ptr, inquiry_reply, sizeof(inquiry_reply));
+ fill_inquiry_response(us, ptr, 36);
+ return USB_STOR_TRANSPORT_GOOD;
+ }
+
+ if (srb->cmnd[0] == READ_CAPACITY) {
+ info->ssize = 0x200; // hard coded 512 byte sectors as per ATA spec
+ rc = datafab_id_device(us, info);
+ if (rc != USB_STOR_TRANSPORT_GOOD)
+ return rc;
+
+ usb_stor_dbg(us, "READ_CAPACITY: %ld sectors, %ld bytes per sector\n",
+ info->sectors, info->ssize);
+
+ // build the reply
+ // we need the last sector, not the number of sectors
+ ((__be32 *) ptr)[0] = cpu_to_be32(info->sectors - 1);
+ ((__be32 *) ptr)[1] = cpu_to_be32(info->ssize);
+ usb_stor_set_xfer_buf(ptr, 8, srb);
+
+ return USB_STOR_TRANSPORT_GOOD;
+ }
+
+ if (srb->cmnd[0] == MODE_SELECT_10) {
+ usb_stor_dbg(us, "Gah! MODE_SELECT_10\n");
+ return USB_STOR_TRANSPORT_ERROR;
+ }
+
+ // don't bother implementing READ_6 or WRITE_6.
+ //
+ if (srb->cmnd[0] == READ_10) {
+ block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
+ ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
+
+ blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
+
+ usb_stor_dbg(us, "READ_10: read block 0x%04lx count %ld\n",
+ block, blocks);
+ return datafab_read_data(us, info, block, blocks);
+ }
+
+ if (srb->cmnd[0] == READ_12) {
+ // we'll probably never see a READ_12 but we'll do it anyway...
+ //
+ block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
+ ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
+
+ blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
+ ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9]));
+
+ usb_stor_dbg(us, "READ_12: read block 0x%04lx count %ld\n",
+ block, blocks);
+ return datafab_read_data(us, info, block, blocks);
+ }
+
+ if (srb->cmnd[0] == WRITE_10) {
+ block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
+ ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
+
+ blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8]));
+
+ usb_stor_dbg(us, "WRITE_10: write block 0x%04lx count %ld\n",
+ block, blocks);
+ return datafab_write_data(us, info, block, blocks);
+ }
+
+ if (srb->cmnd[0] == WRITE_12) {
+ // we'll probably never see a WRITE_12 but we'll do it anyway...
+ //
+ block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) |
+ ((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5]));
+
+ blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) |
+ ((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9]));
+
+ usb_stor_dbg(us, "WRITE_12: write block 0x%04lx count %ld\n",
+ block, blocks);
+ return datafab_write_data(us, info, block, blocks);
+ }
+
+ if (srb->cmnd[0] == TEST_UNIT_READY) {
+ usb_stor_dbg(us, "TEST_UNIT_READY\n");
+ return datafab_id_device(us, info);
+ }
+
+ if (srb->cmnd[0] == REQUEST_SENSE) {
+ usb_stor_dbg(us, "REQUEST_SENSE - Returning faked response\n");
+
+ // this response is pretty bogus right now. eventually if necessary
+ // we can set the correct sense data. so far though it hasn't been
+ // necessary
+ //
+ memset(ptr, 0, 18);
+ ptr[0] = 0xF0;
+ ptr[2] = info->sense_key;
+ ptr[7] = 11;
+ ptr[12] = info->sense_asc;
+ ptr[13] = info->sense_ascq;
+ usb_stor_set_xfer_buf(ptr, 18, srb);
+
+ return USB_STOR_TRANSPORT_GOOD;
+ }
+
+ if (srb->cmnd[0] == MODE_SENSE) {
+ usb_stor_dbg(us, "MODE_SENSE_6 detected\n");
+ return datafab_handle_mode_sense(us, srb, 1);
+ }
+
+ if (srb->cmnd[0] == MODE_SENSE_10) {
+ usb_stor_dbg(us, "MODE_SENSE_10 detected\n");
+ return datafab_handle_mode_sense(us, srb, 0);
+ }
+
+ if (srb->cmnd[0] == ALLOW_MEDIUM_REMOVAL) {
+ // sure. whatever. not like we can stop the user from
+ // popping the media out of the device (no locking doors, etc)
+ //
+ return USB_STOR_TRANSPORT_GOOD;
+ }
+
+ if (srb->cmnd[0] == START_STOP) {
+ /* this is used by sd.c'check_scsidisk_media_change to detect
+ media change */
+ usb_stor_dbg(us, "START_STOP\n");
+ /* the first datafab_id_device after a media change returns
+ an error (determined experimentally) */
+ rc = datafab_id_device(us, info);
+ if (rc == USB_STOR_TRANSPORT_GOOD) {
+ info->sense_key = NO_SENSE;
+ srb->result = SUCCESS;
+ } else {
+ info->sense_key = UNIT_ATTENTION;
+ srb->result = SAM_STAT_CHECK_CONDITION;
+ }
+ return rc;
+ }
+
+ usb_stor_dbg(us, "Gah! Unknown command: %d (0x%x)\n",
+ srb->cmnd[0], srb->cmnd[0]);
+ info->sense_key = 0x05;
+ info->sense_asc = 0x20;
+ info->sense_ascq = 0x00;
+ return USB_STOR_TRANSPORT_FAILED;
+}
+
+static int datafab_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 - datafab_usb_ids) + datafab_unusual_dev_list);
+ if (result)
+ return result;
+
+ us->transport_name = "Datafab Bulk-Only";
+ us->transport = datafab_transport;
+ us->transport_reset = usb_stor_Bulk_reset;
+ us->max_lun = 1;
+
+ result = usb_stor_probe2(us);
+ return result;
+}
+
+static struct usb_driver datafab_driver = {
+ .name = "ums-datafab",
+ .probe = datafab_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 = datafab_usb_ids,
+ .soft_unbind = 1,
+ .no_dynamic_id = 1,
+};
+
+module_usb_driver(datafab_driver);
Code Review / kvmfornfv.git / blobdiff