patch-2.4.8 linux/drivers/usb/storage/datafab.c
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- Lines: 807
- Date:
Sun Jul 29 21:11:50 2001
- Orig file:
v2.4.7/linux/drivers/usb/storage/datafab.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.4.7/linux/drivers/usb/storage/datafab.c linux/drivers/usb/storage/datafab.c
@@ -0,0 +1,806 @@
+/* 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)
+ *
+ * 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(). Basically this means
+ * setting mode_param_header[3] = 0x80.
+ */
+
+#include "transport.h"
+#include "protocol.h"
+#include "usb.h"
+#include "debug.h"
+#include "datafab.h"
+
+#include <linux/sched.h>
+#include <linux/errno.h>
+#include <linux/malloc.h>
+
+extern int usb_stor_bulk_msg(struct us_data *us, void *data, int pipe,
+ unsigned int len, unsigned int *act_len);
+
+static int datafab_determine_lun(struct us_data *us, struct datafab_info *info);
+
+
+static void datafab_dump_data(unsigned char *data, int len)
+{
+ unsigned char buf[80];
+ int sofar = 0;
+
+ if (!data)
+ return;
+
+ memset(buf, 0, sizeof(buf));
+
+ for (sofar = 0; sofar < len; sofar++) {
+ sprintf(buf + strlen(buf), "%02x ",
+ ((unsigned int) data[sofar]) & 0xFF);
+
+ if (sofar % 16 == 15) {
+ US_DEBUGP("datafab: %s\n", buf);
+ memset(buf, 0, sizeof(buf));
+ }
+ }
+
+ if (strlen(buf) != 0)
+ US_DEBUGP("datafab: %s\n", buf);
+}
+
+
+static int datafab_raw_bulk(int direction,
+ struct us_data *us,
+ unsigned char *data,
+ unsigned int len)
+{
+ int result;
+ int act_len;
+ int pipe;
+
+ if (direction == SCSI_DATA_READ)
+ pipe = usb_rcvbulkpipe(us->pusb_dev, us->ep_in);
+ else
+ pipe = usb_sndbulkpipe(us->pusb_dev, us->ep_out);
+
+ result = usb_stor_bulk_msg(us, data, pipe, len, &act_len);
+
+ // if we stall, we need to clear it before we go on
+ if (result == -EPIPE) {
+ US_DEBUGP("datafab_raw_bulk: EPIPE. clearing endpoint halt for"
+ " pipe 0x%x, stalled at %d bytes\n", pipe, act_len);
+ usb_clear_halt(us->pusb_dev, pipe);
+ }
+
+ if (result) {
+ // NAK - that means we've retried a few times already
+ if (result == -ETIMEDOUT) {
+ US_DEBUGP("datafab_raw_bulk: device NAKed\n");
+ return US_BULK_TRANSFER_FAILED;
+ }
+
+ // -ENOENT -- we canceled this transfer
+ if (result == -ENOENT) {
+ US_DEBUGP("datafab_raw_bulk: transfer aborted\n");
+ return US_BULK_TRANSFER_ABORTED;
+ }
+
+ if (result == -EPIPE) {
+ US_DEBUGP("datafab_raw_bulk: output pipe stalled\n");
+ return USB_STOR_TRANSPORT_FAILED;
+ }
+
+ // the catch-all case
+ US_DEBUGP("datafab_raw_bulk: unknown error\n");
+ return US_BULK_TRANSFER_FAILED;
+ }
+
+ if (act_len != len) {
+ US_DEBUGP("datafab_raw_bulk: Warning. Transferred only %d bytes\n", act_len);
+ return US_BULK_TRANSFER_SHORT;
+ }
+
+ US_DEBUGP("datafab_raw_bulk: Transfered %d of %d bytes\n", act_len, len);
+ return US_BULK_TRANSFER_GOOD;
+}
+
+static inline int datafab_bulk_read(struct us_data *us,
+ unsigned char *data,
+ unsigned int len)
+{
+ if (len == 0)
+ return USB_STOR_TRANSPORT_GOOD;
+
+ US_DEBUGP("datafab_bulk_read: len = %d\n", len);
+ return datafab_raw_bulk(SCSI_DATA_READ, us, data, len);
+}
+
+
+static inline int datafab_bulk_write(struct us_data *us,
+ unsigned char *data,
+ unsigned int len)
+{
+ if (len == 0)
+ return USB_STOR_TRANSPORT_GOOD;
+
+ US_DEBUGP("datafab_bulk_write: len = %d\n", len);
+ return datafab_raw_bulk(SCSI_DATA_WRITE, us, data, len);
+}
+
+
+static int datafab_read_data(struct us_data *us,
+ struct datafab_info *info,
+ u32 sector,
+ u32 sectors,
+ unsigned char *dest,
+ int use_sg)
+{
+ unsigned char command[8] = { 0, 0, 0, 0, 0, 0xE0, 0x20, 0x01 };
+ unsigned char *buffer = NULL;
+ unsigned char *ptr;
+ unsigned char thistime;
+ struct scatterlist *sg = NULL;
+ int totallen, len, result;
+ int sg_idx = 0, current_sg_offset = 0;
+ int transferred, rc;
+
+ // 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) {
+ rc = datafab_determine_lun(us, info);
+ if (rc != USB_STOR_TRANSPORT_GOOD)
+ return rc;
+ }
+
+ command[5] += (info->lun << 4);
+
+ // If we're using scatter-gather, we have to create a new
+ // buffer to read all of the data in first, since a
+ // scatter-gather buffer could in theory start in the middle
+ // of a page, which would be bad. A developer who wants a
+ // challenge might want to write a limited-buffer
+ // version of this code.
+
+ totallen = sectors * info->ssize;
+
+ do {
+ // loop, never allocate or transfer more than 64k at once (min(128k, 255*info->ssize) is the real limit)
+ len = min(totallen, 65536);
+
+ if (use_sg) {
+ sg = (struct scatterlist *) dest;
+ buffer = kmalloc(len, GFP_KERNEL);
+ if (buffer == NULL)
+ return USB_STOR_TRANSPORT_ERROR;
+ ptr = buffer;
+ } else {
+ ptr = dest;
+ }
+
+ 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] |= (sector >> 24) & 0x0F;
+
+ // send the command
+ US_DEBUGP("datafab_read_data: sending following command\n");
+ datafab_dump_data(command, sizeof(command));
+
+ result = datafab_bulk_write(us, command, sizeof(command));
+ if (result != USB_STOR_TRANSPORT_GOOD) {
+ if (use_sg)
+ kfree(buffer);
+ return result;
+ }
+
+ // read the result
+ result = datafab_bulk_read(us, ptr, len);
+ if (result != USB_STOR_TRANSPORT_GOOD) {
+ if (use_sg)
+ kfree(buffer);
+ return result;
+ }
+
+ US_DEBUGP("datafab_read_data results: %d bytes\n", len);
+ // datafab_dump_data(ptr, len);
+
+ sectors -= thistime;
+ sector += thistime;
+
+ if (use_sg) {
+ transferred = 0;
+ while (sg_idx < use_sg && transferred < len) {
+ if (len - transferred >= sg[sg_idx].length - current_sg_offset) {
+ US_DEBUGP("datafab_read_data: adding %d bytes to %d byte sg buffer\n", sg[sg_idx].length - current_sg_offset, sg[sg_idx].length);
+ memcpy(sg[sg_idx].address + current_sg_offset,
+ buffer + transferred,
+ sg[sg_idx].length - current_sg_offset);
+ transferred += sg[sg_idx].length - current_sg_offset;
+ current_sg_offset = 0;
+ // on to the next sg buffer
+ ++sg_idx;
+ } else {
+ US_DEBUGP("datafab_read_data: adding %d bytes to %d byte sg buffer\n", len - transferred, sg[sg_idx].length);
+ memcpy(sg[sg_idx].address + current_sg_offset,
+ buffer + transferred,
+ len - transferred);
+ current_sg_offset += len - transferred;
+ // this sg buffer is only partially full and we're out of data to copy in
+ break;
+ }
+ }
+ kfree(buffer);
+ } else {
+ dest += len;
+ }
+
+ totallen -= len;
+ } while (totallen > 0);
+
+ return USB_STOR_TRANSPORT_GOOD;
+}
+
+
+static int datafab_write_data(struct us_data *us,
+ struct datafab_info *info,
+ u32 sector,
+ u32 sectors,
+ unsigned char *src,
+ int use_sg)
+{
+ unsigned char command[8] = { 0, 0, 0, 0, 0, 0xE0, 0x30, 0x02 };
+ unsigned char reply[2] = { 0, 0 };
+ unsigned char *buffer = NULL;
+ unsigned char *ptr;
+ unsigned char thistime;
+ struct scatterlist *sg = NULL;
+ int totallen, len, result;
+ int sg_idx = 0, current_sg_offset = 0;
+ int transferred, rc;
+
+ // 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) {
+ rc = datafab_determine_lun(us, info);
+ if (rc != USB_STOR_TRANSPORT_GOOD)
+ return rc;
+ }
+
+ command[5] += (info->lun << 4);
+
+ // If we're using scatter-gather, we have to create a new
+ // buffer to read all of the data in first, since a
+ // scatter-gather buffer could in theory start in the middle
+ // of a page, which would be bad. A developer who wants a
+ // challenge might want to write a limited-buffer
+ // version of this code.
+
+ totallen = sectors * info->ssize;
+
+ do {
+ // loop, never allocate or transfer more than 64k at once (min(128k, 255*info->ssize) is the real limit)
+ len = min(totallen, 65536);
+
+ if (use_sg) {
+ sg = (struct scatterlist *) src;
+ buffer = kmalloc(len, GFP_KERNEL);
+ if (buffer == NULL)
+ return USB_STOR_TRANSPORT_ERROR;
+ ptr = buffer;
+
+ memset(buffer, 0, len);
+
+ // copy the data from the sg bufs into the big contiguous buf
+ //
+ transferred = 0;
+ while (transferred < len) {
+ if (len - transferred >= sg[sg_idx].length - current_sg_offset) {
+ US_DEBUGP("datafab_write_data: getting %d bytes from %d byte sg buffer\n", sg[sg_idx].length - current_sg_offset, sg[sg_idx].length);
+ memcpy(ptr + transferred,
+ sg[sg_idx].address + current_sg_offset,
+ sg[sg_idx].length - current_sg_offset);
+ transferred += sg[sg_idx].length - current_sg_offset;
+ current_sg_offset = 0;
+ // on to the next sg buffer
+ ++sg_idx;
+ } else {
+ US_DEBUGP("datafab_write_data: getting %d bytes from %d byte sg buffer\n", len - transferred, sg[sg_idx].length);
+ memcpy(ptr + transferred,
+ sg[sg_idx].address + current_sg_offset,
+ len - transferred);
+ current_sg_offset += len - transferred;
+ // we only copied part of this sg buffer
+ break;
+ }
+ }
+ } else {
+ ptr = src;
+ }
+
+ 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] |= (sector >> 24) & 0x0F;
+
+ // send the command
+ US_DEBUGP("datafab_write_data: sending following command\n");
+ datafab_dump_data(command, sizeof(command));
+
+ result = datafab_bulk_write(us, command, sizeof(command));
+ if (result != USB_STOR_TRANSPORT_GOOD) {
+ if (use_sg)
+ kfree(buffer);
+ return result;
+ }
+
+ // send the data
+ result = datafab_bulk_write(us, ptr, len);
+ if (result != USB_STOR_TRANSPORT_GOOD) {
+ if (use_sg)
+ kfree(buffer);
+ return result;
+ }
+
+ // read the result
+ result = datafab_bulk_read(us, reply, sizeof(reply));
+ if (result != USB_STOR_TRANSPORT_GOOD) {
+ if (use_sg)
+ kfree(buffer);
+ return result;
+ }
+
+ if (reply[0] != 0x50 && reply[1] != 0) {
+ US_DEBUGP("datafab_write_data: Gah! write return code: %02x %02x\n", reply[0], reply[1]);
+ if (use_sg)
+ kfree(buffer);
+ return USB_STOR_TRANSPORT_ERROR;
+ }
+
+ sectors -= thistime;
+ sector += thistime;
+
+ if (use_sg) {
+ kfree(buffer);
+ } else {
+ src += len;
+ }
+
+ totallen -= len;
+ } while (totallen > 0);
+
+ return USB_STOR_TRANSPORT_GOOD;
+}
+
+
+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?
+ //
+ unsigned char command[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 };
+ unsigned char buf[512];
+ int count = 0, rc;
+
+ if (!us || !info)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ US_DEBUGP("datafab_determine_lun: locating...\n");
+
+ // we'll try 10 times before giving up...
+ //
+ while (count++ < 10) {
+ command[5] = 0xa0;
+
+ rc = datafab_bulk_write(us, command, 8);
+ if (rc != USB_STOR_TRANSPORT_GOOD)
+ return rc;
+
+ rc = datafab_bulk_read(us, buf, sizeof(buf));
+ if (rc == USB_STOR_TRANSPORT_GOOD) {
+ info->lun = 0;
+ return USB_STOR_TRANSPORT_GOOD;
+ }
+
+ command[5] = 0xb0;
+
+ rc = datafab_bulk_write(us, command, 8);
+ if (rc != USB_STOR_TRANSPORT_GOOD)
+ return rc;
+
+ rc = datafab_bulk_read(us, buf, sizeof(buf));
+ if (rc == USB_STOR_TRANSPORT_GOOD) {
+ info->lun = 1;
+ return USB_STOR_TRANSPORT_GOOD;
+ }
+
+ wait_ms(20);
+ }
+
+ return USB_STOR_TRANSPORT_FAILED;
+}
+
+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...
+ //
+ unsigned char command[8] = { 0, 1, 0, 0, 0, 0xa0, 0xec, 1 };
+ unsigned char reply[512];
+ int rc;
+
+ if (!us || !info)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ if (info->lun == -1) {
+ rc = datafab_determine_lun(us, info);
+ if (rc != USB_STOR_TRANSPORT_GOOD)
+ return rc;
+ }
+
+ command[5] += (info->lun << 4);
+
+ rc = datafab_bulk_write(us, command, 8);
+ if (rc != USB_STOR_TRANSPORT_GOOD)
+ return rc;
+
+ // we'll go ahead and extract the media capacity while we're here...
+ //
+ rc = datafab_bulk_read(us, reply, sizeof(reply));
+ if (rc == USB_STOR_TRANSPORT_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]) );
+ }
+
+ return rc;
+}
+
+
+static int datafab_handle_mode_sense(struct us_data *us,
+ Scsi_Cmnd * srb,
+ unsigned char *ptr,
+ int sense_6)
+{
+ unsigned char mode_param_header[8] = {
+ 0, 0, 0, 0, 0, 0, 0, 0
+ };
+ unsigned char rw_err_page[12] = {
+ 0x1, 0xA, 0x21, 1, 0, 0, 0, 0, 1, 0, 0, 0
+ };
+ unsigned char cache_page[12] = {
+ 0x8, 0xA, 0x1, 0, 0, 0, 0, 0, 0, 0, 0, 0
+ };
+ unsigned char rbac_page[12] = {
+ 0x1B, 0xA, 0, 0x81, 0, 0, 0, 0, 0, 0, 0, 0
+ };
+ unsigned char timer_page[8] = {
+ 0x1C, 0x6, 0, 0, 0, 0
+ };
+ unsigned char pc, page_code;
+ unsigned short total_len = 0;
+ unsigned short param_len, i = 0;
+
+ // 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...
+ //
+
+ if (sense_6)
+ param_len = srb->cmnd[4];
+ else
+ param_len = ((u16) (srb->cmnd[7]) >> 8) | ((u16) (srb->cmnd[8]));
+
+ pc = srb->cmnd[2] >> 6;
+ page_code = srb->cmnd[2] & 0x3F;
+
+ switch (pc) {
+ case 0x0:
+ US_DEBUGP("datafab_handle_mode_sense: Current values\n");
+ break;
+ case 0x1:
+ US_DEBUGP("datafab_handle_mode_sense: Changeable values\n");
+ break;
+ case 0x2:
+ US_DEBUGP("datafab_handle_mode_sense: Default values\n");
+ break;
+ case 0x3:
+ US_DEBUGP("datafab_handle_mode_sense: Saves values\n");
+ break;
+ }
+
+ mode_param_header[3] = 0x80; // write enable
+
+ switch (page_code) {
+ case 0x0:
+ // vendor-specific mode
+ return USB_STOR_TRANSPORT_ERROR;
+
+ case 0x1:
+ total_len = sizeof(rw_err_page);
+ mode_param_header[0] = total_len >> 8;
+ mode_param_header[1] = total_len & 0xFF;
+ mode_param_header[3] = 0x00; // WP enable: 0x80
+
+ memcpy(ptr, mode_param_header, sizeof(mode_param_header));
+ i += sizeof(mode_param_header);
+ memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
+ break;
+
+ case 0x8:
+ total_len = sizeof(cache_page);
+ mode_param_header[0] = total_len >> 8;
+ mode_param_header[1] = total_len & 0xFF;
+ mode_param_header[3] = 0x00; // WP enable: 0x80
+
+ memcpy(ptr, mode_param_header, sizeof(mode_param_header));
+ i += sizeof(mode_param_header);
+ memcpy(ptr + i, cache_page, sizeof(cache_page));
+ break;
+
+ case 0x1B:
+ total_len = sizeof(rbac_page);
+ mode_param_header[0] = total_len >> 8;
+ mode_param_header[1] = total_len & 0xFF;
+ mode_param_header[3] = 0x00; // WP enable: 0x80
+
+ memcpy(ptr, mode_param_header, sizeof(mode_param_header));
+ i += sizeof(mode_param_header);
+ memcpy(ptr + i, rbac_page, sizeof(rbac_page));
+ break;
+
+ case 0x1C:
+ total_len = sizeof(timer_page);
+ mode_param_header[0] = total_len >> 8;
+ mode_param_header[1] = total_len & 0xFF;
+ mode_param_header[3] = 0x00; // WP enable: 0x80
+
+ memcpy(ptr, mode_param_header, sizeof(mode_param_header));
+ i += sizeof(mode_param_header);
+ memcpy(ptr + i, timer_page, sizeof(timer_page));
+ break;
+
+ case 0x3F: // retrieve all pages
+ total_len = sizeof(timer_page) + sizeof(rbac_page) +
+ sizeof(cache_page) + sizeof(rw_err_page);
+ mode_param_header[0] = total_len >> 8;
+ mode_param_header[1] = total_len & 0xFF;
+ mode_param_header[3] = 0x00; // WP enable
+
+ memcpy(ptr, mode_param_header, sizeof(mode_param_header));
+ i += sizeof(mode_param_header);
+ 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));
+ break;
+ }
+
+ return USB_STOR_TRANSPORT_GOOD;
+}
+
+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
+//
+int datafab_transport(Scsi_Cmnd * srb, struct us_data *us)
+{
+ struct datafab_info *info;
+ int rc;
+ unsigned long block, blocks;
+ unsigned char *ptr = NULL;
+ unsigned char inquiry_reply[36] = {
+ 0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00
+ };
+
+ if (!us->extra) {
+ us->extra = kmalloc(sizeof(struct datafab_info), GFP_KERNEL);
+ if (!us->extra) {
+ US_DEBUGP("datafab_transport: Gah! Can't allocate storage for Datafab info struct!\n");
+ return USB_STOR_TRANSPORT_ERROR;
+ }
+ memset(us->extra, 0, sizeof(struct datafab_info));
+ us->extra_destructor = datafab_info_destructor;
+ ((struct datafab_info *)us->extra)->lun = -1;
+ }
+
+ info = (struct datafab_info *) (us->extra);
+ ptr = (unsigned char *) srb->request_buffer;
+
+ if (srb->cmnd[0] == INQUIRY) {
+ US_DEBUGP("datafab_transport: INQUIRY. Returning bogus response");
+ memset( inquiry_reply + 8, 0, 28 );
+ fill_inquiry_response(us, inquiry_reply, 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;
+
+ US_DEBUGP("datafab_transport: READ_CAPACITY: %ld sectors, %ld bytes per sector\n",
+ info->sectors, info->ssize);
+
+ // build the reply
+ //
+ ptr[0] = (info->sectors >> 24) & 0xFF;
+ ptr[1] = (info->sectors >> 16) & 0xFF;
+ ptr[2] = (info->sectors >> 8) & 0xFF;
+ ptr[3] = (info->sectors) & 0xFF;
+
+ ptr[4] = (info->ssize >> 24) & 0xFF;
+ ptr[5] = (info->ssize >> 16) & 0xFF;
+ ptr[6] = (info->ssize >> 8) & 0xFF;
+ ptr[7] = (info->ssize) & 0xFF;
+
+ return USB_STOR_TRANSPORT_GOOD;
+ }
+
+ if (srb->cmnd[0] == MODE_SELECT_10) {
+ US_DEBUGP("datafab_transport: Gah! MODE_SELECT_10.\n");
+ return USB_STOR_TRANSPORT_ERROR;
+ }
+
+ // don't bother implementing READ_6 or WRITE_6. Just set MODE_XLATE and
+ // let the usb storage code convert to READ_10/WRITE_10
+ //
+ 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]));
+
+ US_DEBUGP("datafab_transport: READ_10: read block 0x%04lx count %ld\n", block, blocks);
+ return datafab_read_data(us, info, block, blocks, ptr, srb->use_sg);
+ }
+
+ 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]));
+
+ US_DEBUGP("datafab_transport: READ_12: read block 0x%04lx count %ld\n", block, blocks);
+ return datafab_read_data(us, info, block, blocks, ptr, srb->use_sg);
+ }
+
+ 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]));
+
+ US_DEBUGP("datafab_transport: WRITE_10: write block 0x%04lx count %ld\n", block, blocks);
+ return datafab_write_data(us, info, block, blocks, ptr, srb->use_sg);
+ }
+
+ 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]));
+
+ US_DEBUGP("datafab_transport: WRITE_12: write block 0x%04lx count %ld\n", block, blocks);
+ return datafab_write_data(us, info, block, blocks, ptr, srb->use_sg);
+ }
+
+ if (srb->cmnd[0] == TEST_UNIT_READY) {
+ US_DEBUGP("datafab_transport: TEST_UNIT_READY.\n");
+ return datafab_id_device(us, info);
+ }
+
+ if (srb->cmnd[0] == REQUEST_SENSE) {
+ US_DEBUGP("datafab_transport: 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
+ //
+ ptr[0] = 0xF0;
+ ptr[2] = info->sense_key;
+ ptr[7] = 11;
+ ptr[12] = info->sense_asc;
+ ptr[13] = info->sense_ascq;
+
+ return USB_STOR_TRANSPORT_GOOD;
+ }
+
+ if (srb->cmnd[0] == MODE_SENSE) {
+ US_DEBUGP("datafab_transport: MODE_SENSE_6 detected\n");
+ return datafab_handle_mode_sense(us, srb, ptr, TRUE);
+ }
+
+ if (srb->cmnd[0] == MODE_SENSE_10) {
+ US_DEBUGP("datafab_transport: MODE_SENSE_10 detected\n");
+ return datafab_handle_mode_sense(us, srb, ptr, FALSE);
+ }
+
+ 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;
+ }
+
+ US_DEBUGP("datafab_transport: Gah! Unknown command: %d (0x%x)\n", srb->cmnd[0], srb->cmnd[0]);
+ return USB_STOR_TRANSPORT_ERROR;
+}
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)