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path: root/drivers/usb/storage/jumpshot.c
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Diffstat (limited to 'drivers/usb/storage/jumpshot.c')
-rw-r--r--drivers/usb/storage/jumpshot.c596
1 files changed, 596 insertions, 0 deletions
diff --git a/drivers/usb/storage/jumpshot.c b/drivers/usb/storage/jumpshot.c
new file mode 100644
index 00000000000..aff9d51c327
--- /dev/null
+++ b/drivers/usb/storage/jumpshot.c
@@ -0,0 +1,596 @@
+/* Driver for Lexar "Jumpshot" Compact Flash reader
+ *
+ * $Id: jumpshot.c,v 1.7 2002/02/25 00:40:13 mdharm Exp $
+ *
+ * jumpshot driver v0.1:
+ *
+ * First release
+ *
+ * Current development and maintenance by:
+ * (c) 2000 Jimmie Mayfield (mayfield+usb@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)
+ *
+ * Developed with the assistance of:
+ *
+ * (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 the Lexar Jumpshot USB CompactFlash
+ * reader. Like many other USB CompactFlash readers, the Jumpshot contains
+ * a USB-to-ATA chip.
+ *
+ * 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 jumpshot_handle_mode_sense. See the comments
+ * in that routine.
+ */
+
+#include <linux/sched.h>
+#include <linux/errno.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"
+#include "jumpshot.h"
+
+
+static inline int jumpshot_bulk_read(struct us_data *us,
+ unsigned char *data,
+ unsigned int len)
+{
+ if (len == 0)
+ return USB_STOR_XFER_GOOD;
+
+ US_DEBUGP("jumpshot_bulk_read: len = %d\n", len);
+ return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
+ data, len, NULL);
+}
+
+
+static inline int jumpshot_bulk_write(struct us_data *us,
+ unsigned char *data,
+ unsigned int len)
+{
+ if (len == 0)
+ return USB_STOR_XFER_GOOD;
+
+ US_DEBUGP("jumpshot_bulk_write: len = %d\n", len);
+ return usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
+ data, len, NULL);
+}
+
+
+static int jumpshot_get_status(struct us_data *us)
+{
+ int rc;
+
+ if (!us)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ // send the setup
+ rc = usb_stor_ctrl_transfer(us, us->recv_ctrl_pipe,
+ 0, 0xA0, 0, 7, us->iobuf, 1);
+
+ if (rc != USB_STOR_XFER_GOOD)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ if (us->iobuf[0] != 0x50) {
+ US_DEBUGP("jumpshot_get_status: 0x%2x\n",
+ us->iobuf[0]);
+ return USB_STOR_TRANSPORT_ERROR;
+ }
+
+ return USB_STOR_TRANSPORT_GOOD;
+}
+
+static int jumpshot_read_data(struct us_data *us,
+ struct jumpshot_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_idx = 0, sg_offset = 0;
+
+ // we're working in LBA mode. according to the ATA spec,
+ // we can support up to 28-bit addressing. I don't know if Jumpshot
+ // supports beyond 24-bit addressing. It's kind of hard to test
+ // since it requires > 8GB CF card.
+
+ if (sector > 0x0FFFFFFF)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ 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 | ((sector >> 24) & 0x0F);
+ command[6] = 0x20;
+
+ // send the setup + command
+ result = usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
+ 0, 0x20, 0, 1, command, 7);
+ if (result != USB_STOR_XFER_GOOD)
+ goto leave;
+
+ // read the result
+ result = jumpshot_bulk_read(us, buffer, len);
+ if (result != USB_STOR_XFER_GOOD)
+ goto leave;
+
+ US_DEBUGP("jumpshot_read_data: %d bytes\n", len);
+
+ // Store the data in the transfer buffer
+ usb_stor_access_xfer_buf(buffer, len, us->srb,
+ &sg_idx, &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 jumpshot_write_data(struct us_data *us,
+ struct jumpshot_info *info,
+ u32 sector,
+ u32 sectors)
+{
+ unsigned char *command = us->iobuf;
+ unsigned char *buffer;
+ unsigned char thistime;
+ unsigned int totallen, alloclen;
+ int len, result, waitcount;
+ unsigned int sg_idx = 0, sg_offset = 0;
+
+ // we're working in LBA mode. according to the ATA spec,
+ // we can support up to 28-bit addressing. I don't know if Jumpshot
+ // supports beyond 24-bit addressing. It's kind of hard to test
+ // since it requires > 8GB CF card.
+ //
+ if (sector > 0x0FFFFFFF)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ 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_idx, &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 | ((sector >> 24) & 0x0F);
+ command[6] = 0x30;
+
+ // send the setup + command
+ result = usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
+ 0, 0x20, 0, 1, command, 7);
+ if (result != USB_STOR_XFER_GOOD)
+ goto leave;
+
+ // send the data
+ result = jumpshot_bulk_write(us, buffer, len);
+ if (result != USB_STOR_XFER_GOOD)
+ goto leave;
+
+ // read the result. apparently the bulk write can complete
+ // before the jumpshot drive is finished writing. so we loop
+ // here until we get a good return code
+ waitcount = 0;
+ do {
+ result = jumpshot_get_status(us);
+ if (result != USB_STOR_TRANSPORT_GOOD) {
+ // I have not experimented to find the smallest value.
+ //
+ msleep(50);
+ }
+ } while ((result != USB_STOR_TRANSPORT_GOOD) && (waitcount < 10));
+
+ if (result != USB_STOR_TRANSPORT_GOOD)
+ US_DEBUGP("jumpshot_write_data: Gah! Waitcount = 10. Bad write!?\n");
+
+ sector += thistime;
+ totallen -= len;
+ } while (totallen > 0);
+
+ kfree(buffer);
+ return result;
+
+ leave:
+ kfree(buffer);
+ return USB_STOR_TRANSPORT_ERROR;
+}
+
+static int jumpshot_id_device(struct us_data *us,
+ struct jumpshot_info *info)
+{
+ unsigned char *command = us->iobuf;
+ unsigned char *reply;
+ int rc;
+
+ if (!us || !info)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ command[0] = 0xE0;
+ command[1] = 0xEC;
+ reply = kmalloc(512, GFP_NOIO);
+ if (!reply)
+ return USB_STOR_TRANSPORT_ERROR;
+
+ // send the setup
+ rc = usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
+ 0, 0x20, 0, 6, command, 2);
+
+ if (rc != USB_STOR_XFER_GOOD) {
+ US_DEBUGP("jumpshot_id_device: Gah! "
+ "send_control for read_capacity failed\n");
+ rc = USB_STOR_TRANSPORT_ERROR;
+ goto leave;
+ }
+
+ // read the reply
+ rc = jumpshot_bulk_read(us, reply, 512);
+ if (rc != USB_STOR_XFER_GOOD) {
+ rc = USB_STOR_TRANSPORT_ERROR;
+ goto leave;
+ }
+
+ info->sectors = ((u32)(reply[117]) << 24) |
+ ((u32)(reply[116]) << 16) |
+ ((u32)(reply[115]) << 8) |
+ ((u32)(reply[114]) );
+
+ rc = USB_STOR_TRANSPORT_GOOD;
+
+ leave:
+ kfree(reply);
+ return rc;
+}
+
+static int jumpshot_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 jumpshot_info *info = (struct jumpshot_info *) (us->extra);
+ unsigned char *ptr = us->iobuf;
+
+ pc = srb->cmnd[2] >> 6;
+ page_code = srb->cmnd[2] & 0x3F;
+
+ switch (pc) {
+ case 0x0:
+ US_DEBUGP("jumpshot_handle_mode_sense: Current values\n");
+ break;
+ case 0x1:
+ US_DEBUGP("jumpshot_handle_mode_sense: Changeable values\n");
+ break;
+ case 0x2:
+ US_DEBUGP("jumpshot_handle_mode_sense: Default values\n");
+ break;
+ case 0x3:
+ US_DEBUGP("jumpshot_handle_mode_sense: 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) {
+ case 0x0:
+ // 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:
+ 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 jumpshot_info_destructor(void *extra)
+{
+ // this routine is a placeholder...
+ // currently, we don't allocate any extra blocks so we're okay
+}
+
+
+
+// Transport for the Lexar 'Jumpshot'
+//
+int jumpshot_transport(struct scsi_cmnd * srb, struct us_data *us)
+{
+ struct jumpshot_info *info;
+ int rc;
+ unsigned long block, blocks;
+ unsigned char *ptr = us->iobuf;
+ static unsigned char inquiry_response[8] = {
+ 0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00
+ };
+
+ if (!us->extra) {
+ us->extra = kmalloc(sizeof(struct jumpshot_info), GFP_NOIO);
+ if (!us->extra) {
+ US_DEBUGP("jumpshot_transport: Gah! Can't allocate storage for jumpshot info struct!\n");
+ return USB_STOR_TRANSPORT_ERROR;
+ }
+ memset(us->extra, 0, sizeof(struct jumpshot_info));
+ us->extra_destructor = jumpshot_info_destructor;
+ }
+
+ info = (struct jumpshot_info *) (us->extra);
+
+ if (srb->cmnd[0] == INQUIRY) {
+ US_DEBUGP("jumpshot_transport: INQUIRY. Returning bogus response.\n");
+ memcpy(ptr, inquiry_response, sizeof(inquiry_response));
+ 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 = jumpshot_get_status(us);
+ if (rc != USB_STOR_TRANSPORT_GOOD)
+ return rc;
+
+ rc = jumpshot_id_device(us, info);
+ if (rc != USB_STOR_TRANSPORT_GOOD)
+ return rc;
+
+ US_DEBUGP("jumpshot_transport: READ_CAPACITY: %ld sectors, %ld bytes per sector\n",
+ info->sectors, info->ssize);
+
+ // build the reply
+ //
+ ((__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) {
+ US_DEBUGP("jumpshot_transport: Gah! MODE_SELECT_10.\n");
+ return USB_STOR_TRANSPORT_ERROR;
+ }
+
+ 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("jumpshot_transport: READ_10: read block 0x%04lx count %ld\n", block, blocks);
+ return jumpshot_read_data(us, info, block, blocks);
+ }
+
+ if (srb->cmnd[0] == READ_12) {
+ // I don't think we'll ever see a READ_12 but support 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("jumpshot_transport: READ_12: read block 0x%04lx count %ld\n", block, blocks);
+ return jumpshot_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]));
+
+ US_DEBUGP("jumpshot_transport: WRITE_10: write block 0x%04lx count %ld\n", block, blocks);
+ return jumpshot_write_data(us, info, block, blocks);
+ }
+
+ if (srb->cmnd[0] == WRITE_12) {
+ // I don't think we'll ever see a WRITE_12 but support 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("jumpshot_transport: WRITE_12: write block 0x%04lx count %ld\n", block, blocks);
+ return jumpshot_write_data(us, info, block, blocks);
+ }
+
+
+ if (srb->cmnd[0] == TEST_UNIT_READY) {
+ US_DEBUGP("jumpshot_transport: TEST_UNIT_READY.\n");
+ return jumpshot_get_status(us);
+ }
+
+ if (srb->cmnd[0] == REQUEST_SENSE) {
+ US_DEBUGP("jumpshot_transport: REQUEST_SENSE.\n");
+
+ 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) {
+ US_DEBUGP("jumpshot_transport: MODE_SENSE_6 detected\n");
+ return jumpshot_handle_mode_sense(us, srb, 1);
+ }
+
+ if (srb->cmnd[0] == MODE_SENSE_10) {
+ US_DEBUGP("jumpshot_transport: MODE_SENSE_10 detected\n");
+ return jumpshot_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 */
+ US_DEBUGP("jumpshot_transport: START_STOP.\n");
+ /* the first jumpshot_id_device after a media change returns
+ an error (determined experimentally) */
+ rc = jumpshot_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;
+ }
+
+ US_DEBUGP("jumpshot_transport: 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;
+}
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-11 11:50:33 +0000