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683 lines
17 KiB
683 lines
17 KiB
// 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 ([email protected]) |
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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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* ([email protected]) |
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* |
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* Fix for media change by Joerg Schneider ([email protected]) |
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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 <[email protected]> |
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*/ |
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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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|
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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 <[email protected]>"); |
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MODULE_LICENSE("GPL"); |
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MODULE_IMPORT_NS(USB_STORAGE); |
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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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/* |
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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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|
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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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|
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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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|
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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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|
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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) { |
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usb_stor_dbg(us, "Gah! MODE_SELECT_10\n"); |
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return USB_STOR_TRANSPORT_ERROR; |
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} |
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if (srb->cmnd[0] == READ_10) { |
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block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) | |
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((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5])); |
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blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8])); |
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usb_stor_dbg(us, "READ_10: read block 0x%04lx count %ld\n", |
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block, blocks); |
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return jumpshot_read_data(us, info, block, blocks); |
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} |
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if (srb->cmnd[0] == READ_12) { |
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// I don't think we'll ever see a READ_12 but support it anyway... |
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// |
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block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) | |
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((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5])); |
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blocks = ((u32)(srb->cmnd[6]) << 24) | ((u32)(srb->cmnd[7]) << 16) | |
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((u32)(srb->cmnd[8]) << 8) | ((u32)(srb->cmnd[9])); |
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usb_stor_dbg(us, "READ_12: read block 0x%04lx count %ld\n", |
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block, blocks); |
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return jumpshot_read_data(us, info, block, blocks); |
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} |
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if (srb->cmnd[0] == WRITE_10) { |
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block = ((u32)(srb->cmnd[2]) << 24) | ((u32)(srb->cmnd[3]) << 16) | |
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((u32)(srb->cmnd[4]) << 8) | ((u32)(srb->cmnd[5])); |
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|
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blocks = ((u32)(srb->cmnd[7]) << 8) | ((u32)(srb->cmnd[8])); |
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usb_stor_dbg(us, "WRITE_10: write block 0x%04lx count %ld\n", |
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block, blocks); |
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return jumpshot_write_data(us, info, block, blocks); |
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} |
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|
|
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);
|
|
|