/* Driver for Microtek Scanmaker X6 USB scanner, and possibly others.
*
* (C) Copyright 2000 John Fremlin <vii@penguinpowered.com>
* (C) Copyright 2000 Oliver Neukum <Oliver.Neukum@lrz.uni-muenchen.de>
*
* Parts shamelessly stolen from usb-storage and copyright by their
* authors. Thanks to Matt Dharm for giving us permission!
*
* This driver implements a SCSI host controller driver and a USB
* device driver. To avoid confusion, all the USB related stuff is
* prefixed by mts_usb_ and all the SCSI stuff by mts_scsi_.
*
* Microtek (www.microtek.com) did not release the specifications for
* their USB protocol to us, so we had to reverse engineer them. We
* don't know for which models they are valid.
*
* The X6 USB has three bulk endpoints, one output (0x1) down which
* commands and outgoing data are sent, and two input: 0x82 from which
* normal data is read from the scanner (in packets of maximum 32
* bytes) and from which the status byte is read, and 0x83 from which
* the results of a scan (or preview) are read in up to 64 * 1024 byte
* chunks by the Windows driver. We don't know how much it is possible
* to read at a time from 0x83.
*
* It seems possible to read (with URB transfers) everything from 0x82
* in one go, without bothering to read in 32 byte chunks.
*
* There seems to be an optimisation of a further READ implicit if
* you simply read from 0x83.
*
* Guessed protocol:
*
* Send raw SCSI command to EP 0x1
*
* If there is data to receive:
* If the command was READ datatype=image:
* Read a lot of data from EP 0x83
* Else:
* Read data from EP 0x82
* Else:
* If there is data to transmit:
* Write it to EP 0x1
*
* Read status byte from EP 0x82
*
* References:
*
* The SCSI command set for the scanner is available from
* ftp://ftp.microtek.com/microtek/devpack/
*
* Microtek NV sent us a more up to date version of the document. If
* you want it, just send mail.
*
* Status:
*
* Untested with multiple scanners.
* Untested on SMP.
* Untested on a bigendian machine.
*
* History:
*
* 20000417 starting history
* 20000417 fixed load oops
* 20000417 fixed unload oops
* 20000419 fixed READ IMAGE detection
* 20000424 started conversion to use URBs
* 20000502 handled short transfers as errors
* 20000513 rename and organisation of functions (john)
* 20000513 added IDs for all products supported by Windows driver (john)
* 20000514 Rewrote mts_scsi_queuecommand to use URBs (john)
* 20000514 Version 0.0.8j
* 20000514 Fix reporting of non-existant devices to SCSI layer (john)
* 20000514 Added MTS_DEBUG_INT (john)
* 20000514 Changed "usb-microtek" to "microtek" for consistency (john)
* 20000514 Stupid bug fixes (john)
* 20000514 Version 0.0.9j
* 20000515 Put transfer context and URB in mts_desc (john)
* 20000515 Added prelim turn off debugging support (john)
* 20000515 Version 0.0.10j
* 20000515 Fixed up URB allocation (clear URB on alloc) (john)
* 20000515 Version 0.0.11j
* 20000516 Removed unnecessary spinlock in mts_transfer_context (john)
* 20000516 Removed unnecessary up on instance lock in mts_remove_nolock (john)
* 20000516 Implemented (badly) scsi_abort (john)
* 20000516 Version 0.0.12j
* 20000517 Hopefully removed mts_remove_nolock quasideadlock (john)
* 20000517 Added mts_debug_dump to print ll USB info (john)
* 20000518 Tweaks and documentation updates (john)
* 20000518 Version 0.0.13j
* 20000518 Cleaned up abort handling (john)
* 20000523 Removed scsi_command and various scsi_..._resets (john)
* 20000523 Added unlink URB on scsi_abort, now OHCI supports it (john)
* 20000523 Fixed last tiresome compile warning (john)
* 20000523 Version 0.0.14j (though version 0.1 has come out?)
* 20000602 Added primitive reset
* 20000602 Version 0.2.0
* 20000603 various cosmetic changes
* 20000603 Version 0.2.1
* 20000620 minor cosmetic changes
* 20000620 Version 0.2.2
* 20000822 Hopefully fixed deadlock in mts_remove_nolock()
* 20000822 Fixed minor race in mts_transfer_cleanup()
* 20000822 Fixed deadlock on submission error in queuecommand
* 20000822 Version 0.2.3
* 20000913 Reduced module size if debugging is off
* 20000913 Version 0.2.4
* 20010210 New abort logic
* 20010210 Version 0.3.0
* 20010217 Merged scatter/gather
* 20010218 Version 0.4.0
* 20010218 Cosmetic fixes
* 20010218 Version 0.4.1
* 20010306 Abort while using scatter/gather
* 20010306 Version 0.4.2
* 20010311 Remove all timeouts and tidy up generally (john)
* 20010320 check return value of scsi_register()
* 20010320 Version 0.4.3
* 20010408 Identify version on module load.
* 20011003 Fix multiple requests
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/signal.h>
#include <linux/errno.h>
#include <linux/random.h>
#include <linux/poll.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/usb.h>
#include <linux/proc_fs.h>
#include <asm/atomic.h>
#include <linux/blkdev.h>
#include "../../scsi/scsi.h"
#include <scsi/scsi_host.h>
#include "microtek.h"
/*
* Version Information
*/
#define DRIVER_VERSION "v0.4.3"
#define DRIVER_AUTHOR "John Fremlin <vii@penguinpowered.com>, Oliver Neukum <Oliver.Neukum@lrz.uni-muenchen.de>"
#define DRIVER_DESC "Microtek Scanmaker X6 USB scanner driver"
/* Should we do debugging? */
//#define MTS_DO_DEBUG
/* USB layer driver interface */
static int mts_usb_probe(struct usb_interface *intf,
const struct usb_device_id *id);
static void mts_usb_disconnect(struct usb_interface *intf);
static struct usb_device_id mts_usb_ids [];
static struct usb_driver mts_usb_driver = {
.name = "microtekX6",
.probe = mts_usb_probe,
.disconnect = mts_usb_disconnect,
.id_table = mts_usb_ids,
};
/* Internal driver stuff */
#define MTS_VERSION "0.4.3"
#define MTS_NAME "microtek usb (rev " MTS_VERSION "): "
#define MTS_WARNING(x...) \
printk( KERN_WARNING MTS_NAME x )
#define MTS_ERROR(x...) \
printk( KERN_ERR MTS_NAME x )
#define MTS_INT_ERROR(x...) \
MTS_ERROR(x)
#define MTS_MESSAGE(x...) \
printk( KERN_INFO MTS_NAME x )
#if defined MTS_DO_DEBUG
#define MTS_DEBUG(x...) \
printk( KERN_DEBUG MTS_NAME x )
#define MTS_DEBUG_GOT_HERE() \
MTS_DEBUG("got to %s:%d (%s)\n", __FILE__, (int)__LINE__, __PRETTY_FUNCTION__ )
#define MTS_DEBUG_INT() \
do { MTS_DEBUG_GOT_HERE(); \
MTS_DEBUG("transfer = 0x%x context = 0x%x\n",(int)transfer,(int)context ); \
MTS_DEBUG("status = 0x%x data-length = 0x%x sent = 0x%x\n",(int)transfer->status,(int)context->data_length, (int)transfer->actual_length ); \
mts_debug_dump(context->instance);\
} while(0)
#else
#define MTS_NUL_STATEMENT do { } while(0)
#define MTS_DEBUG(x...) MTS_NUL_STATEMENT
#define MTS_DEBUG_GOT_HERE() MTS_NUL_STATEMENT
#define MTS_DEBUG_INT() MTS_NUL_STATEMENT
#endif
#define MTS_INT_INIT()\
struct mts_transfer_context* context = (struct mts_transfer_context*)transfer->context; \
MTS_DEBUG_INT();\
#ifdef MTS_DO_DEBUG
static inline void mts_debug_dump(struct mts_desc* desc) {
MTS_DEBUG("desc at 0x%x: toggle = %02x%02x\n",
(int)desc,
(int)desc->usb_dev->toggle[1],(int)desc->usb_dev->toggle[0]
);
MTS_DEBUG("ep_out=%x ep_response=%x ep_image=%x\n",
usb_sndbulkpipe(desc->usb_dev,desc->ep_out),
usb_rcvbulkpipe(desc->usb_dev,desc->ep_response),
usb_rcvbulkpipe(desc->usb_dev,desc->ep_image)
);
}
static inline void mts_show_command(struct scsi_cmnd *srb)
{
char *what = NULL;
switch (srb->cmnd[0]) {
case TEST_UNIT_READY: what = "TEST_UNIT_READY"; break;
case REZERO_UNIT: what = "REZERO_UNIT"; break;
case REQUEST_SENSE: what = "REQUEST_SENSE"; break;
case FORMAT_UNIT: what = "FORMAT_UNIT"; break;
case READ_BLOCK_LIMITS: what = "READ_BLOCK_LIMITS"; break;
case REASSIGN_BLOCKS: what = "REASSIGN_BLOCKS"; break;
case READ_6: what = "READ_6"; break;
case WRITE_6: what = "WRITE_6"; break;
case SEEK_6: what = "SEEK_6"; break;
case READ_REVERSE: what = "READ_REVERSE"; break;
case WRITE_FILEMARKS: what = "WRITE_FILEMARKS"; break;
case SPACE: what = "SPACE"; break;
case INQUIRY: what = "INQUIRY"; break;
case RECOVER_BUFFERED_DATA: what = "RECOVER_BUFFERED_DATA"; break;
case MODE_SELECT: what = "MODE_SELECT"; break;
case RESERVE: what = "RESERVE"; break;
case RELEASE: what = "RELEASE"; break;
case COPY: what = "COPY"; break;
case ERASE: what = "ERASE"; break;
case MODE_SENSE: what = "MODE_SENSE"; break;
case START_STOP: what = "START_STOP"; break;
case RECEIVE_DIAGNOSTIC: what = "RECEIVE_DIAGNOSTIC"; break;
case SEND_DIAGNOSTIC: what = "SEND_DIAGNOSTIC"; break;
case ALLOW_MEDIUM_REMOVAL: what = "ALLOW_MEDIUM_REMOVAL"; break;
case SET_WINDOW: what = "SET_WINDOW"; break;
case READ_CAPACITY: what = "READ_CAPACITY"; break;
case READ_10: what = "READ_10"; break;
case WRITE_10: what = "WRITE_10"; break;
case SEEK_10: what = "SEEK_10"; break;
case WRITE_VERIFY: what = "WRITE_VERIFY"; break;
case VERIFY: what = "VERIFY"; break;
case SEARCH_HIGH: what = "SEARCH_HIGH"; break;
case SEARCH_EQUAL: what = "SEARCH_EQUAL"; break;
case SEARCH_LOW: what = "SEARCH_LOW"; break;
case SET_LIMITS: what = "SET_LIMITS"; break;
case READ_POSITION: what = "READ_POSITION"; break;
case SYNCHRONIZE_CACHE: what = "SYNCHRONIZE_CACHE"; break;
case LOCK_UNLOCK_CACHE: what = "LOCK_UNLOCK_CACHE"; break;
case READ_DEFECT_DATA: what = "READ_DEFECT_DATA"; break;
case MEDIUM_SCAN: what = "MEDIUM_SCAN"; break;
case COMPARE: what = "COMPARE"; break;
case COPY_VERIFY: what = "COPY_VERIFY"; break;
case WRITE_BUFFER: what = "WRITE_BUFFER"; break;
case READ_BUFFER: what = "READ_BUFFER"; break;
case UPDATE_BLOCK: what = "UPDATE_BLOCK"; break;
case READ_LONG: what = "READ_LONG"; break;
case WRITE_LONG: what = "WRITE_LONG"; break;
case CHANGE_DEFINITION: what = "CHANGE_DEFINITION"; break;
case WRITE_SAME: what = "WRITE_SAME"; break;
case READ_TOC: what = "READ_TOC"; break;
case LOG_SELECT: what = "LOG_SELECT"; break;
case LOG_SENSE: what = "LOG_SENSE"; break;
case MODE_SELECT_10: what = "MODE_SELECT_10"; break;
case MODE_SENSE_10: what = "MODE_SENSE_10"; break;
case MOVE_MEDIUM: what = "MOVE_MEDIUM"; break;
case READ_12: what = "READ_12"; break;
case WRITE_12: what = "WRITE_12"; break;
case WRITE_VERIFY_12: what = "WRITE_VERIFY_12"; break;
case SEARCH_HIGH_12: what = "SEARCH_HIGH_12"; break;
case SEARCH_EQUAL_12: what = "SEARCH_EQUAL_12"; break;
case SEARCH_LOW_12: what = "SEARCH_LOW_12"; break;
case READ_ELEMENT_STATUS: what = "READ_ELEMENT_STATUS"; break;
case SEND_VOLUME_TAG: what = "SEND_VOLUME_TAG"; break;
case WRITE_LONG_2: what = "WRITE_LONG_2"; break;
default:
MTS_DEBUG("can't decode command\n");
goto out;
break;
}
MTS_DEBUG( "Command %s (%d bytes)\n", what, srb->cmd_len);
out:
MTS_DEBUG( " %02x %02x %02x %02x %02x %02x %02x %02x %02x %02x\n",
srb->cmnd[0], srb->cmnd[1], srb->cmnd[2], srb->cmnd[3], srb->cmnd[4], srb->cmnd[5],
srb->cmnd[6], srb->cmnd[7], srb->cmnd[8], srb->cmnd[9]);
}
#else
static inline void mts_show_command(struct scsi_cmnd * dummy)
{
}
static inline void mts_debug_dump(struct mts_desc* dummy)
{
}
#endif
static inline void mts_urb_abort(struct mts_desc* desc) {
MTS_DEBUG_GOT_HERE();
mts_debug_dump(desc);
usb_kill_urb( desc->urb );
}
static int mts_slave_alloc (struct scsi_device *s)
{
s->inquiry_len = 0x24;
return 0;
}
static int mts_slave_configure (struct scsi_device *s)
{
blk_queue_dma_alignment(s->request_queue, (512 - 1));
return 0;
}
static int mts_scsi_abort(struct scsi_cmnd *srb)
{
struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
MTS_DEBUG_GOT_HERE();
mts_urb_abort(desc);
return FAILED;
}
static int mts_scsi_host_reset(struct scsi_cmnd *srb)
{
struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
int result, rc;
MTS_DEBUG_GOT_HERE();
mts_debug_dump(desc);
rc = usb_lock_device_for_reset(desc->usb_dev, desc->usb_intf);
if (rc < 0)
return FAILED;
result = usb_reset_device(desc->usb_dev);
if (rc)
usb_unlock_device(desc->usb_dev);
return result ? FAILED : SUCCESS;
}
static int
mts_scsi_queuecommand(struct scsi_cmnd *srb, mts_scsi_cmnd_callback callback);
static void mts_transfer_cleanup( struct urb *transfer );
static void mts_do_sg(struct urb * transfer);
static inline
void mts_int_submit_urb (struct urb* transfer,
int pipe,
void* data,
unsigned length,
usb_complete_t callback )
/* Interrupt context! */
/* Holding transfer->context->lock! */
{
int res;
MTS_INT_INIT();
usb_fill_bulk_urb(transfer,
context->instance->usb_dev,
pipe,
data,
length,
callback,
context
);
transfer->status = 0;
res = usb_submit_urb( transfer, GFP_ATOMIC );
if ( unlikely(res) ) {
MTS_INT_ERROR( "could not submit URB! Error was %d\n",(int)res );
context->srb->result = DID_ERROR << 16;
mts_transfer_cleanup(transfer);
}
return;
}
static void mts_transfer_cleanup( struct urb *transfer )
/* Interrupt context! */
{
MTS_INT_INIT();
if ( likely(context->final_callback != NULL) )
context->final_callback(context->srb);
}
static void mts_transfer_done( struct urb *transfer )
{
MTS_INT_INIT();
context->srb->result &= MTS_SCSI_ERR_MASK;
context->srb->result |= (unsigned)(*context->scsi_status)<<1;
mts_transfer_cleanup(transfer);
return;
}
static void mts_get_status( struct urb *transfer )
/* Interrupt context! */
{
MTS_INT_INIT();
mts_int_submit_urb(transfer,
usb_rcvbulkpipe(context->instance->usb_dev,
context->instance->ep_response),
context->scsi_status,
1,
mts_transfer_done );
}
static void mts_data_done( struct urb* transfer )
/* Interrupt context! */
{
MTS_INT_INIT();
if ( context->data_length != transfer->actual_length ) {
context->srb->resid = context->data_length - transfer->actual_length;
} else if ( unlikely(transfer->status) ) {
context->srb->result = (transfer->status == -ENOENT ? DID_ABORT : DID_ERROR)<<16;
}
mts_get_status(transfer);
return;
}
static void mts_command_done( struct urb *transfer )
/* Interrupt context! */
{
MTS_INT_INIT();
if ( unlikely(transfer->status) ) {
if (transfer->status == -ENOENT) {
/* We are being killed */
MTS_DEBUG_GOT_HERE();
context->srb->result = DID_ABORT<<16;
} else {
/* A genuine error has occurred */
MTS_DEBUG_GOT_HERE();
context->srb->result = DID_ERROR<<16;
}
mts_transfer_cleanup(transfer);
return;
}
if (context->srb->cmnd[0] == REQUEST_SENSE) {
mts_int_submit_urb(transfer,
context->data_pipe,
context->srb->sense_buffer,
context->data_length,
mts_data_done);
} else { if ( context->data ) {
mts_int_submit_urb(transfer,
context->data_pipe,
context->data,
context->data_length,
context->srb->use_sg > 1 ? mts_do_sg : mts_data_done);
} else {
mts_get_status(transfer);
}
}
return;
}
static void mts_do_sg (struct urb* transfer)
{
struct scatterlist * sg;
MTS_INT_INIT();
MTS_DEBUG("Processing fragment %d of %d\n", context->fragment,context->srb->use_sg);
if (unlikely(transfer->status)) {
context->srb->result = (transfer->status == -ENOENT ? DID_ABORT : DID_ERROR)<<16;
mts_transfer_cleanup(transfer);
}
sg = context->srb->request_buffer;
context->fragment++;
mts_int_submit_urb(transfer,
context->data_pipe,
page_address(sg[context->fragment].page) +
sg[context->fragment].offset,
sg[context->fragment].length,
context->fragment + 1 == context->srb->use_sg ? mts_data_done : mts_do_sg);
return;
}
static const u8 mts_read_image_sig[] = { 0x28, 00, 00, 00 };
static const u8 mts_read_image_sig_len = 4;
static const unsigned char mts_direction[256/8] = {
0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77,
0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};
#define MTS_DIRECTION_IS_IN(x) ((mts_direction[x>>3] >> (x & 7)) & 1)
static void
mts_build_transfer_context(struct scsi_cmnd *srb, struct mts_desc* desc)
{
int pipe;
struct scatterlist * sg;
MTS_DEBUG_GOT_HERE();
desc->context.instance = desc;
desc->context.srb = srb;
desc->context.fragment = 0;
if (!srb->use_sg) {
if ( !srb->request_bufflen ){
desc->context.data = NULL;
desc->context.data_length = 0;
return;
} else {
desc->context.data = srb->request_buffer;
desc->context.data_length = srb->request_bufflen;
MTS_DEBUG("length = %d or %d\n",
srb->request_bufflen, srb->bufflen);
}
} else {
MTS_DEBUG("Using scatter/gather\n");
sg = srb->request_buffer;
desc->context.data = page_address(sg[0].page) + sg[0].offset;
desc->context.data_length = sg[0].length;
}
/* can't rely on srb->sc_data_direction */
/* Brutally ripped from usb-storage */
if ( !memcmp( srb->cmnd, mts_read_image_sig, mts_read_image_sig_len )
) { pipe = usb_rcvbulkpipe(desc->usb_dev,desc->ep_image);
MTS_DEBUG( "transfering from desc->ep_image == %d\n",
(int)desc->ep_image );
} else if ( MTS_DIRECTION_IS_IN(srb->cmnd[0]) ) {
pipe = usb_rcvbulkpipe(desc->usb_dev,desc->ep_response);
MTS_DEBUG( "transfering from desc->ep_response == %d\n",
(int)desc->ep_response);
} else {
MTS_DEBUG("transfering to desc->ep_out == %d\n",
(int)desc->ep_out);
pipe = usb_sndbulkpipe(desc->usb_dev,desc->ep_out);
}
desc->context.data_pipe = pipe;
}
static int
mts_scsi_queuecommand(struct scsi_cmnd *srb, mts_scsi_cmnd_callback callback)
{
struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]);
int err = 0;
int res;
MTS_DEBUG_GOT_HERE();
mts_show_command(srb);
mts_debug_dump(desc);
if ( srb->device->lun || srb->device->id || srb->device->channel ) {
MTS_DEBUG("Command to LUN=%d ID=%d CHANNEL=%d from SCSI layer\n",(int)srb->device->lun,(int)srb->device->id, (int)srb->device->channel );
MTS_DEBUG("this device doesn't exist\n");
srb->result = DID_BAD_TARGET << 16;
if(likely(callback != NULL))
callback(srb);
goto out;
}
usb_fill_bulk_urb(desc->urb,
desc->usb_dev,
usb_sndbulkpipe(desc->usb_dev,desc->ep_out),
srb->cmnd,
srb->cmd_len,
mts_command_done,
&desc->context
);
mts_build_transfer_context( srb, desc );
desc->context.final_callback = callback;
/* here we need ATOMIC as we are called with the iolock */
res=usb_submit_urb(desc->urb, GFP_ATOMIC);
if(unlikely(res)){
MTS_ERROR("error %d submitting URB\n",(int)res);
srb->result = DID_ERROR << 16;
if(likely(callback != NULL))
callback(srb);
}
out:
return err;
}
static struct scsi_host_template mts_scsi_host_template = {
.module = THIS_MODULE,
.name = "microtekX6",
.proc_name = "microtekX6",
.queuecommand = mts_scsi_queuecommand,
.eh_abort_handler = mts_scsi_abort,
.eh_host_reset_handler = mts_scsi_host_reset,
.sg_tablesize = SG_ALL,
.can_queue = 1,
.this_id = -1,
.cmd_per_lun = 1,
.use_clustering = 1,
.emulated = 1,
.slave_alloc = mts_slave_alloc,
.slave_configure = mts_slave_configure,
.max_sectors= 256, /* 128 K */
};
struct vendor_product
{
char* name;
enum
{
mts_sup_unknown=0,
mts_sup_alpha,
mts_sup_full
}
support_status;
} ;
/* These are taken from the msmUSB.inf file on the Windows driver CD */
static const struct vendor_product mts_supported_products[] =
{
{ "Phantom 336CX", mts_sup_unknown},
{ "Phantom 336CX", mts_sup_unknown},
{ "Scanmaker X6", mts_sup_alpha},
{ "Phantom C6", mts_sup_unknown},
{ "Phantom 336CX", mts_sup_unknown},
{ "ScanMaker V6USL", mts_sup_unknown},
{ "ScanMaker V6USL", mts_sup_unknown},
{ "Scanmaker V6UL", mts_sup_unknown},
{ "Scanmaker V6UPL", mts_sup_alpha},
};
/* The entries of microtek_table must correspond, line-by-line to
the entries of mts_supported_products[]. */
static struct usb_device_id mts_usb_ids [] =
{
{ USB_DEVICE(0x4ce, 0x0300) },
{ USB_DEVICE(0x5da, 0x0094) },
{ USB_DEVICE(0x5da, 0x0099) },
{ USB_DEVICE(0x5da, 0x009a) },
{ USB_DEVICE(0x5da, 0x00a0) },
{ USB_DEVICE(0x5da, 0x00a3) },
{ USB_DEVICE(0x5da, 0x80a3) },
{ USB_DEVICE(0x5da, 0x80ac) },
{ USB_DEVICE(0x5da, 0x00b6) },
{ } /* Terminating entry */
};
MODULE_DEVICE_TABLE (usb, mts_usb_ids);
static int mts_usb_probe(struct usb_interface *intf,
const struct usb_device_id *id)
{
int i;
int ep_out = -1;
int ep_in_set[3]; /* this will break if we have more than three endpoints
which is why we check */
int *ep_in_current = ep_in_set;
int err_retval = -ENOMEM;
struct mts_desc * new_desc;
struct vendor_product const* p;
struct usb_device *dev = interface_to_usbdev (intf);
/* the current altsetting on the interface we're probing */
struct usb_host_interface *altsetting;
MTS_DEBUG_GOT_HERE();
MTS_DEBUG( "usb-device descriptor at %x\n", (int)dev );
MTS_DEBUG( "product id = 0x%x, vendor id = 0x%x\n",
le16_to_cpu(dev->descriptor.idProduct),
le16_to_cpu(dev->descriptor.idVendor) );
MTS_DEBUG_GOT_HERE();
p = &mts_supported_products[id - mts_usb_ids];
MTS_DEBUG_GOT_HERE();
MTS_DEBUG( "found model %s\n", p->name );
if ( p->support_status != mts_sup_full )
MTS_MESSAGE( "model %s is not known to be fully supported, reports welcome!\n",
p->name );
/* the current altsetting on the interface we're probing */
altsetting = intf->cur_altsetting;
/* Check if the config is sane */
if ( altsetting->desc.bNumEndpoints != MTS_EP_TOTAL ) {
MTS_WARNING( "expecting %d got %d endpoints! Bailing out.\n",
(int)MTS_EP_TOTAL, (int)altsetting->desc.bNumEndpoints );
return -ENODEV;
}
for( i = 0; i < altsetting->desc.bNumEndpoints; i++ ) {
if ((altsetting->endpoint[i].desc.bmAttributes &
USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK) {
MTS_WARNING( "can only deal with bulk endpoints; endpoint %d is not bulk.\n",
(int)altsetting->endpoint[i].desc.bEndpointAddress );
} else {
if (altsetting->endpoint[i].desc.bEndpointAddress &
USB_DIR_IN)
*ep_in_current++
= altsetting->endpoint[i].desc.bEndpointAddress &
USB_ENDPOINT_NUMBER_MASK;
else {
if ( ep_out != -1 ) {
MTS_WARNING( "can only deal with one output endpoints. Bailing out." );
return -ENODEV;
}
ep_out = altsetting->endpoint[i].desc.bEndpointAddress &
USB_ENDPOINT_NUMBER_MASK;
}
}
}
if ( ep_out == -1 ) {
MTS_WARNING( "couldn't find an output bulk endpoint. Bailing out.\n" );
return -ENODEV;
}
new_desc = kzalloc(sizeof(struct mts_desc), GFP_KERNEL);
if (!new_desc)
goto out;
new_desc->urb = usb_alloc_urb(0, GFP_KERNEL);
if (!new_desc->urb)
goto out_kfree;
new_desc->context.scsi_status = kmalloc(1, GFP_KERNEL);
if (!new_desc->context.scsi_status)
goto out_free_urb;
new_desc->usb_dev = dev;
new_desc->usb_intf = intf;
init_MUTEX(&new_desc->lock);
/* endpoints */
new_desc->ep_out = ep_out;
new_desc->ep_response = ep_in_set[0];
new_desc->ep_image = ep_in_set[1];
if ( new_desc->ep_out != MTS_EP_OUT )
MTS_WARNING( "will this work? Command EP is not usually %d\n",
(int)new_desc->ep_out );
if ( new_desc->ep_response != MTS_EP_RESPONSE )
MTS_WARNING( "will this work? Response EP is not usually %d\n",
(int)new_desc->ep_response );
if ( new_desc->ep_image != MTS_EP_IMAGE )
MTS_WARNING( "will this work? Image data EP is not usually %d\n",
(int)new_desc->ep_image );
new_desc->host = scsi_host_alloc(&mts_scsi_host_template,
sizeof(new_desc));
if (!new_desc->host)
goto out_kfree2;
new_desc->host->hostdata[0] = (unsigned long)new_desc;
if (scsi_add_host(new_desc->host, NULL)) {
err_retval = -EIO;
goto out_host_put;
}
scsi_scan_host(new_desc->host);
usb_set_intfdata(intf, new_desc);
return 0;
out_host_put:
scsi_host_put(new_desc->host);
out_kfree2:
kfree(new_desc->context.scsi_status);
out_free_urb:
usb_free_urb(new_desc->urb);
out_kfree:
kfree(new_desc);
out:
return err_retval;
}
static void mts_usb_disconnect (struct usb_interface *intf)
{
struct mts_desc *desc = usb_get_intfdata(intf);
usb_set_intfdata(intf, NULL);
usb_kill_urb(desc->urb);
scsi_remove_host(desc->host);
scsi_host_put(desc->host);
usb_free_urb(desc->urb);
kfree(desc->context.scsi_status);
kfree(desc);
}
static int __init microtek_drv_init(void)
{
return usb_register(&mts_usb_driver);
}
static void __exit microtek_drv_exit(void)
{
usb_deregister(&mts_usb_driver);
}
module_init(microtek_drv_init);
module_exit(microtek_drv_exit);
MODULE_AUTHOR( DRIVER_AUTHOR );
MODULE_DESCRIPTION( DRIVER_DESC );
MODULE_LICENSE("GPL");
