683 lines
17 KiB
C
683 lines
17 KiB
C
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Driver for Lexar "Jumpshot" Compact Flash reader
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*
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* jumpshot driver v0.1:
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*
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* First release
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*
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* Current development and maintenance by:
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* (c) 2000 Jimmie Mayfield (mayfield+usb@sackheads.org)
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*
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* Many thanks to Robert Baruch for the SanDisk SmartMedia reader driver
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* which I used as a template for this driver.
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*
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* Some bugfixes and scatter-gather code by Gregory P. Smith
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* (greg-usb@electricrain.com)
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*
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* Fix for media change by Joerg Schneider (js@joergschneider.com)
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*
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* Developed with the assistance of:
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*
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* (C) 2002 Alan Stern <stern@rowland.org>
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*/
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/*
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* This driver attempts to support the Lexar Jumpshot USB CompactFlash
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* reader. Like many other USB CompactFlash readers, the Jumpshot contains
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* a USB-to-ATA chip.
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*
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* This driver supports reading and writing. If you're truly paranoid,
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* however, you can force the driver into a write-protected state by setting
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* the WP enable bits in jumpshot_handle_mode_sense. See the comments
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* in that routine.
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*/
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#include <linux/errno.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <scsi/scsi.h>
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#include <scsi/scsi_cmnd.h>
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#include "usb.h"
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#include "transport.h"
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#include "protocol.h"
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#include "debug.h"
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#include "scsiglue.h"
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#define DRV_NAME "ums-jumpshot"
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MODULE_DESCRIPTION("Driver for Lexar \"Jumpshot\" Compact Flash reader");
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MODULE_AUTHOR("Jimmie Mayfield <mayfield+usb@sackheads.org>");
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MODULE_LICENSE("GPL");
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/*
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* The table of devices
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*/
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#define UNUSUAL_DEV(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax, \
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vendorName, productName, useProtocol, useTransport, \
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initFunction, flags) \
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{ USB_DEVICE_VER(id_vendor, id_product, bcdDeviceMin, bcdDeviceMax), \
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.driver_info = (flags) }
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static struct usb_device_id jumpshot_usb_ids[] = {
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# include "unusual_jumpshot.h"
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{ } /* Terminating entry */
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};
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MODULE_DEVICE_TABLE(usb, jumpshot_usb_ids);
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#undef UNUSUAL_DEV
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/*
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* The flags table
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*/
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#define UNUSUAL_DEV(idVendor, idProduct, bcdDeviceMin, bcdDeviceMax, \
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vendor_name, product_name, use_protocol, use_transport, \
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init_function, Flags) \
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{ \
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.vendorName = vendor_name, \
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.productName = product_name, \
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.useProtocol = use_protocol, \
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.useTransport = use_transport, \
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.initFunction = init_function, \
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}
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static struct us_unusual_dev jumpshot_unusual_dev_list[] = {
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# include "unusual_jumpshot.h"
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{ } /* Terminating entry */
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};
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#undef UNUSUAL_DEV
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struct jumpshot_info {
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unsigned long sectors; /* total sector count */
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unsigned long ssize; /* sector size in bytes */
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/* the following aren't used yet */
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unsigned char sense_key;
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unsigned long sense_asc; /* additional sense code */
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unsigned long sense_ascq; /* additional sense code qualifier */
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};
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static inline int jumpshot_bulk_read(struct us_data *us,
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unsigned char *data,
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unsigned int len)
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{
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if (len == 0)
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return USB_STOR_XFER_GOOD;
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usb_stor_dbg(us, "len = %d\n", len);
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return usb_stor_bulk_transfer_buf(us, us->recv_bulk_pipe,
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data, len, NULL);
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}
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static inline int jumpshot_bulk_write(struct us_data *us,
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unsigned char *data,
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unsigned int len)
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{
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if (len == 0)
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return USB_STOR_XFER_GOOD;
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usb_stor_dbg(us, "len = %d\n", len);
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return usb_stor_bulk_transfer_buf(us, us->send_bulk_pipe,
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data, len, NULL);
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}
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static int jumpshot_get_status(struct us_data *us)
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{
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int rc;
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if (!us)
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return USB_STOR_TRANSPORT_ERROR;
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// send the setup
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rc = usb_stor_ctrl_transfer(us, us->recv_ctrl_pipe,
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0, 0xA0, 0, 7, us->iobuf, 1);
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if (rc != USB_STOR_XFER_GOOD)
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return USB_STOR_TRANSPORT_ERROR;
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if (us->iobuf[0] != 0x50) {
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usb_stor_dbg(us, "0x%2x\n", us->iobuf[0]);
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return USB_STOR_TRANSPORT_ERROR;
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}
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return USB_STOR_TRANSPORT_GOOD;
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}
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static int jumpshot_read_data(struct us_data *us,
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struct jumpshot_info *info,
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u32 sector,
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u32 sectors)
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{
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unsigned char *command = us->iobuf;
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unsigned char *buffer;
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unsigned char thistime;
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unsigned int totallen, alloclen;
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int len, result;
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unsigned int sg_offset = 0;
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struct scatterlist *sg = NULL;
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// we're working in LBA mode. according to the ATA spec,
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// we can support up to 28-bit addressing. I don't know if Jumpshot
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// supports beyond 24-bit addressing. It's kind of hard to test
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// since it requires > 8GB CF card.
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if (sector > 0x0FFFFFFF)
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return USB_STOR_TRANSPORT_ERROR;
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totallen = sectors * info->ssize;
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// Since we don't read more than 64 KB at a time, we have to create
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// a bounce buffer and move the data a piece at a time between the
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// bounce buffer and the actual transfer buffer.
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alloclen = min(totallen, 65536u);
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buffer = kmalloc(alloclen, GFP_NOIO);
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if (buffer == NULL)
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return USB_STOR_TRANSPORT_ERROR;
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do {
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// loop, never allocate or transfer more than 64k at once
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// (min(128k, 255*info->ssize) is the real limit)
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len = min(totallen, alloclen);
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thistime = (len / info->ssize) & 0xff;
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command[0] = 0;
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command[1] = thistime;
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command[2] = sector & 0xFF;
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command[3] = (sector >> 8) & 0xFF;
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command[4] = (sector >> 16) & 0xFF;
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command[5] = 0xE0 | ((sector >> 24) & 0x0F);
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command[6] = 0x20;
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// send the setup + command
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result = usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
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0, 0x20, 0, 1, command, 7);
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if (result != USB_STOR_XFER_GOOD)
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goto leave;
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// read the result
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result = jumpshot_bulk_read(us, buffer, len);
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if (result != USB_STOR_XFER_GOOD)
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goto leave;
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usb_stor_dbg(us, "%d bytes\n", len);
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// Store the data in the transfer buffer
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usb_stor_access_xfer_buf(buffer, len, us->srb,
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&sg, &sg_offset, TO_XFER_BUF);
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sector += thistime;
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totallen -= len;
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} while (totallen > 0);
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kfree(buffer);
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return USB_STOR_TRANSPORT_GOOD;
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leave:
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kfree(buffer);
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return USB_STOR_TRANSPORT_ERROR;
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}
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static int jumpshot_write_data(struct us_data *us,
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struct jumpshot_info *info,
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u32 sector,
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u32 sectors)
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{
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unsigned char *command = us->iobuf;
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unsigned char *buffer;
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unsigned char thistime;
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unsigned int totallen, alloclen;
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int len, result, waitcount;
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unsigned int sg_offset = 0;
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struct scatterlist *sg = NULL;
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// we're working in LBA mode. according to the ATA spec,
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// we can support up to 28-bit addressing. I don't know if Jumpshot
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// supports beyond 24-bit addressing. It's kind of hard to test
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// since it requires > 8GB CF card.
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//
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if (sector > 0x0FFFFFFF)
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return USB_STOR_TRANSPORT_ERROR;
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totallen = sectors * info->ssize;
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// Since we don't write more than 64 KB at a time, we have to create
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// a bounce buffer and move the data a piece at a time between the
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// bounce buffer and the actual transfer buffer.
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alloclen = min(totallen, 65536u);
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buffer = kmalloc(alloclen, GFP_NOIO);
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if (buffer == NULL)
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return USB_STOR_TRANSPORT_ERROR;
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do {
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// loop, never allocate or transfer more than 64k at once
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// (min(128k, 255*info->ssize) is the real limit)
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len = min(totallen, alloclen);
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thistime = (len / info->ssize) & 0xff;
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// Get the data from the transfer buffer
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usb_stor_access_xfer_buf(buffer, len, us->srb,
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&sg, &sg_offset, FROM_XFER_BUF);
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command[0] = 0;
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command[1] = thistime;
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command[2] = sector & 0xFF;
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command[3] = (sector >> 8) & 0xFF;
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command[4] = (sector >> 16) & 0xFF;
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command[5] = 0xE0 | ((sector >> 24) & 0x0F);
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command[6] = 0x30;
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// send the setup + command
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result = usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
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0, 0x20, 0, 1, command, 7);
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if (result != USB_STOR_XFER_GOOD)
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goto leave;
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// send the data
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result = jumpshot_bulk_write(us, buffer, len);
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if (result != USB_STOR_XFER_GOOD)
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goto leave;
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// read the result. apparently the bulk write can complete
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// before the jumpshot drive is finished writing. so we loop
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// here until we get a good return code
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waitcount = 0;
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do {
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result = jumpshot_get_status(us);
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if (result != USB_STOR_TRANSPORT_GOOD) {
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// I have not experimented to find the smallest value.
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//
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msleep(50);
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}
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} while ((result != USB_STOR_TRANSPORT_GOOD) && (waitcount < 10));
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if (result != USB_STOR_TRANSPORT_GOOD)
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usb_stor_dbg(us, "Gah! Waitcount = 10. Bad write!?\n");
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sector += thistime;
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totallen -= len;
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} while (totallen > 0);
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kfree(buffer);
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return result;
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leave:
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kfree(buffer);
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return USB_STOR_TRANSPORT_ERROR;
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}
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static int jumpshot_id_device(struct us_data *us,
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struct jumpshot_info *info)
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{
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unsigned char *command = us->iobuf;
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unsigned char *reply;
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int rc;
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if (!info)
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return USB_STOR_TRANSPORT_ERROR;
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command[0] = 0xE0;
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command[1] = 0xEC;
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reply = kmalloc(512, GFP_NOIO);
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if (!reply)
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return USB_STOR_TRANSPORT_ERROR;
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// send the setup
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rc = usb_stor_ctrl_transfer(us, us->send_ctrl_pipe,
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0, 0x20, 0, 6, command, 2);
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if (rc != USB_STOR_XFER_GOOD) {
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usb_stor_dbg(us, "Gah! send_control for read_capacity failed\n");
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rc = USB_STOR_TRANSPORT_ERROR;
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goto leave;
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}
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// read the reply
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rc = jumpshot_bulk_read(us, reply, 512);
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if (rc != USB_STOR_XFER_GOOD) {
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rc = USB_STOR_TRANSPORT_ERROR;
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goto leave;
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}
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info->sectors = ((u32)(reply[117]) << 24) |
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((u32)(reply[116]) << 16) |
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((u32)(reply[115]) << 8) |
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((u32)(reply[114]) );
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rc = USB_STOR_TRANSPORT_GOOD;
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leave:
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kfree(reply);
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return rc;
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}
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static int jumpshot_handle_mode_sense(struct us_data *us,
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struct scsi_cmnd * srb,
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int sense_6)
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{
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static unsigned char rw_err_page[12] = {
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0x1, 0xA, 0x21, 1, 0, 0, 0, 0, 1, 0, 0, 0
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};
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static unsigned char cache_page[12] = {
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0x8, 0xA, 0x1, 0, 0, 0, 0, 0, 0, 0, 0, 0
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};
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static unsigned char rbac_page[12] = {
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0x1B, 0xA, 0, 0x81, 0, 0, 0, 0, 0, 0, 0, 0
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};
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static unsigned char timer_page[8] = {
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0x1C, 0x6, 0, 0, 0, 0
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};
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unsigned char pc, page_code;
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unsigned int i = 0;
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struct jumpshot_info *info = (struct jumpshot_info *) (us->extra);
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unsigned char *ptr = us->iobuf;
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pc = srb->cmnd[2] >> 6;
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page_code = srb->cmnd[2] & 0x3F;
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switch (pc) {
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case 0x0:
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usb_stor_dbg(us, "Current values\n");
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break;
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case 0x1:
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usb_stor_dbg(us, "Changeable values\n");
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break;
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case 0x2:
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usb_stor_dbg(us, "Default values\n");
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break;
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case 0x3:
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usb_stor_dbg(us, "Saves values\n");
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break;
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}
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memset(ptr, 0, 8);
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if (sense_6) {
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ptr[2] = 0x00; // WP enable: 0x80
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i = 4;
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} else {
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ptr[3] = 0x00; // WP enable: 0x80
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i = 8;
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}
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switch (page_code) {
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case 0x0:
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// vendor-specific mode
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info->sense_key = 0x05;
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info->sense_asc = 0x24;
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info->sense_ascq = 0x00;
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return USB_STOR_TRANSPORT_FAILED;
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case 0x1:
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memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
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i += sizeof(rw_err_page);
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break;
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case 0x8:
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memcpy(ptr + i, cache_page, sizeof(cache_page));
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i += sizeof(cache_page);
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break;
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case 0x1B:
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memcpy(ptr + i, rbac_page, sizeof(rbac_page));
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i += sizeof(rbac_page);
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break;
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case 0x1C:
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memcpy(ptr + i, timer_page, sizeof(timer_page));
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i += sizeof(timer_page);
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break;
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case 0x3F:
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memcpy(ptr + i, timer_page, sizeof(timer_page));
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i += sizeof(timer_page);
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memcpy(ptr + i, rbac_page, sizeof(rbac_page));
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i += sizeof(rbac_page);
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memcpy(ptr + i, cache_page, sizeof(cache_page));
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i += sizeof(cache_page);
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memcpy(ptr + i, rw_err_page, sizeof(rw_err_page));
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i += sizeof(rw_err_page);
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break;
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}
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if (sense_6)
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ptr[0] = i - 1;
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else
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((__be16 *) ptr)[0] = cpu_to_be16(i - 2);
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usb_stor_set_xfer_buf(ptr, i, srb);
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return USB_STOR_TRANSPORT_GOOD;
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}
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static void jumpshot_info_destructor(void *extra)
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{
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// this routine is a placeholder...
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// currently, we don't allocate any extra blocks so we're okay
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}
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// Transport for the Lexar 'Jumpshot'
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//
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static int jumpshot_transport(struct scsi_cmnd *srb, struct us_data *us)
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{
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struct jumpshot_info *info;
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int rc;
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unsigned long block, blocks;
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unsigned char *ptr = us->iobuf;
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static unsigned char inquiry_response[8] = {
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0x00, 0x80, 0x00, 0x01, 0x1F, 0x00, 0x00, 0x00
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};
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if (!us->extra) {
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us->extra = kzalloc(sizeof(struct jumpshot_info), GFP_NOIO);
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if (!us->extra)
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return USB_STOR_TRANSPORT_ERROR;
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us->extra_destructor = jumpshot_info_destructor;
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}
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info = (struct jumpshot_info *) (us->extra);
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if (srb->cmnd[0] == INQUIRY) {
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usb_stor_dbg(us, "INQUIRY - Returning bogus response\n");
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memcpy(ptr, inquiry_response, sizeof(inquiry_response));
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fill_inquiry_response(us, ptr, 36);
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return USB_STOR_TRANSPORT_GOOD;
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}
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if (srb->cmnd[0] == READ_CAPACITY) {
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info->ssize = 0x200; // hard coded 512 byte sectors as per ATA spec
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rc = jumpshot_get_status(us);
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if (rc != USB_STOR_TRANSPORT_GOOD)
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return rc;
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rc = jumpshot_id_device(us, info);
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if (rc != USB_STOR_TRANSPORT_GOOD)
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return rc;
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usb_stor_dbg(us, "READ_CAPACITY: %ld sectors, %ld bytes per sector\n",
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info->sectors, info->ssize);
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// build the reply
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//
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((__be32 *) ptr)[0] = cpu_to_be32(info->sectors - 1);
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((__be32 *) ptr)[1] = cpu_to_be32(info->ssize);
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usb_stor_set_xfer_buf(ptr, 8, srb);
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return USB_STOR_TRANSPORT_GOOD;
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}
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if (srb->cmnd[0] == MODE_SELECT_10) {
|
|
usb_stor_dbg(us, "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]));
|
|
|
|
usb_stor_dbg(us, "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]));
|
|
|
|
usb_stor_dbg(us, "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]));
|
|
|
|
usb_stor_dbg(us, "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]));
|
|
|
|
usb_stor_dbg(us, "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) {
|
|
usb_stor_dbg(us, "TEST_UNIT_READY\n");
|
|
return jumpshot_get_status(us);
|
|
}
|
|
|
|
if (srb->cmnd[0] == REQUEST_SENSE) {
|
|
usb_stor_dbg(us, "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) {
|
|
usb_stor_dbg(us, "MODE_SENSE_6 detected\n");
|
|
return jumpshot_handle_mode_sense(us, srb, 1);
|
|
}
|
|
|
|
if (srb->cmnd[0] == MODE_SENSE_10) {
|
|
usb_stor_dbg(us, "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
|
|
*/
|
|
usb_stor_dbg(us, "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;
|
|
}
|
|
|
|
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 struct scsi_host_template jumpshot_host_template;
|
|
|
|
static int jumpshot_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 - jumpshot_usb_ids) + jumpshot_unusual_dev_list,
|
|
&jumpshot_host_template);
|
|
if (result)
|
|
return result;
|
|
|
|
us->transport_name = "Lexar Jumpshot Control/Bulk";
|
|
us->transport = jumpshot_transport;
|
|
us->transport_reset = usb_stor_Bulk_reset;
|
|
us->max_lun = 1;
|
|
|
|
result = usb_stor_probe2(us);
|
|
return result;
|
|
}
|
|
|
|
static struct usb_driver jumpshot_driver = {
|
|
.name = DRV_NAME,
|
|
.probe = jumpshot_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 = jumpshot_usb_ids,
|
|
.soft_unbind = 1,
|
|
.no_dynamic_id = 1,
|
|
};
|
|
|
|
module_usb_stor_driver(jumpshot_driver, jumpshot_host_template, DRV_NAME);
|