static int mts_scsi_detect (struct SHT * sht)
{
/* Whole function stolen from usb-storage */
struct mts_desc * desc = (struct mts_desc *)sht->proc_dir;
/* What a hideous hack! */
char local_name[48];
MTS_DEBUG_GOT_HERE();
/* set up the name of our subdirectory under /proc/scsi/ */
sprintf(local_name, "microtek-%d", desc->host_number);
sht->proc_name = kmalloc (strlen(local_name) + 1, GFP_KERNEL);
/* FIXME: where is this freed ? */
if (!sht->proc_name) {
MTS_ERROR( "unable to allocate memory for proc interface!!\n" );
return 0;
}
strcpy(sht->proc_name, local_name);
sht->proc_dir = NULL;
/* In host->hostdata we store a pointer to desc */
desc->host = scsi_register(sht, sizeof(desc));
desc->host->hostdata[0] = (unsigned long)desc;
/* FIXME: what if sizeof(void*) != sizeof(unsigned long)? */
return 1;
}
static
int mts_scsi_queuecommand( Scsi_Cmnd *srb, mts_scsi_cmnd_callback callback )
{
struct mts_desc* desc = (struct mts_desc*)(srb->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(callback)
callback(srb);
goto out;
}
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;
res=usb_submit_urb(&desc->urb);
if(res){
MTS_ERROR("error %d submitting URB\n",(int)res);
srb->result = DID_ERROR << 16;
if(callback)
callback(srb);
}
out:
return err;
}
static int
mts_scsi_queuecommand_lck(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;
}
inline static
void mts_int_submit_urb (struct urb* transfer,
int pipe,
void* data,
unsigned length,
mts_usb_urb_callback callback )
/* Interrupt context! */
/* Holding transfer->context->lock! */
{
int res;
struct mts_transfer_context* context;
MTS_INT_INIT();
FILL_BULK_URB(transfer,
context->instance->usb_dev,
pipe,
data,
length,
callback,
context
);
/* transfer->transfer_flags = USB_DISABLE_SPD;*/
transfer->transfer_flags = USB_ASYNC_UNLINK;
transfer->status = 0;
transfer->timeout = 100;
res = usb_submit_urb( transfer );
if ( res ) {
MTS_ERROR( "could not submit URB! Error was %d\n",(int)res );
context->srb->result = DID_ERROR << 16;
context->state = mts_con_error;
mts_transfer_cleanup(transfer);
}
return;
}
static void * mts_usb_probe (struct usb_device *dev, unsigned int interface,
const struct usb_device_id *id)
{
int i;
int result;
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;
struct mts_desc * new_desc;
struct vendor_product const* p;
/* the altsettting 0 on the interface we're probing */
struct usb_interface_descriptor *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",
(int)dev->descriptor.idProduct,
(int)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 altsettting 0 on the interface we're probing */
altsetting =
&(dev->actconfig->interface[interface].altsetting[0]);
/* Check if the config is sane */
if ( altsetting->bNumEndpoints != MTS_EP_TOTAL ) {
MTS_WARNING( "expecting %d got %d endpoints! Bailing out.\n",
(int)MTS_EP_TOTAL, (int)altsetting->bNumEndpoints );
return NULL;
}
for( i = 0; i < altsetting->bNumEndpoints; i++ ) {
if ((altsetting->endpoint[i].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].bEndpointAddress );
} else {
if (altsetting->endpoint[i].bEndpointAddress &
USB_DIR_IN)
*ep_in_current++
= altsetting->endpoint[i].bEndpointAddress &
USB_ENDPOINT_NUMBER_MASK;
else {
if ( ep_out != -1 ) {
MTS_WARNING( "can only deal with one output endpoints. Bailing out." );
return NULL;
}
ep_out = altsetting->endpoint[i].bEndpointAddress &
USB_ENDPOINT_NUMBER_MASK;
}
}
}
if ( ep_out == -1 ) {
MTS_WARNING( "couldn't find an output bulk endpoint. Bailing out.\n" );
return NULL;
}
/* I don't understand the following fully (it's from usb-storage) -- John */
/* set the interface -- STALL is an acceptable response here */
result = usb_set_interface(dev, altsetting->bInterfaceNumber, 0);
MTS_DEBUG("usb_set_interface returned %d.\n",result);
switch( result )
{
case 0: /* no error */
break;
case -EPIPE:
usb_clear_halt(dev, usb_sndctrlpipe(dev, 0));
MTS_DEBUG( "clearing clearing stall on control interface\n" );
break;
default:
MTS_DEBUG( "unknown error %d from usb_set_interface\n",
(int)result );
return NULL;
}
/* allocating a new descriptor */
new_desc = (struct mts_desc *)kmalloc(sizeof(struct mts_desc), GFP_KERNEL);
if (new_desc == NULL)
{
MTS_ERROR("couldn't allocate scanner desc, bailing out!\n");
return NULL;
}
/* As done by usb_alloc_urb */
memset( new_desc, 0, sizeof(*new_desc) );
spin_lock_init(&new_desc->urb.lock);
/* initialising that descriptor */
new_desc->usb_dev = dev;
new_desc->interface = interface;
init_MUTEX(&new_desc->lock);
if(mts_list){
new_desc->host_number = mts_list->host_number+1;
} else {
new_desc->host_number = 0;
}
/* 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 );
/* Initialize the host template based on the default one */
memcpy(&(new_desc->ctempl), &mts_scsi_host_template, sizeof(mts_scsi_host_template));
/* HACK from usb-storage - this is needed for scsi detection */
(struct mts_desc *)new_desc->ctempl.proc_dir = new_desc; /* FIXME */
MTS_DEBUG("registering SCSI module\n");
new_desc->ctempl.module = THIS_MODULE;
result = scsi_register_host(&new_desc->ctempl);
/* Will get hit back in microtek_detect by this func */
if ( result )
{
MTS_ERROR( "error %d from scsi_register_host! Help!\n",
(int)result );
/* FIXME: need more cleanup? */
kfree( new_desc );
return NULL;
}
MTS_DEBUG_GOT_HERE();
/* FIXME: the bomb is armed, must the host be registered under lock ? */
/* join the list - lock it */
down(&mts_list_semaphore);
mts_add_nolock( new_desc );
up(&mts_list_semaphore);
MTS_DEBUG("completed probe and exiting happily\n");
return (void *)new_desc;
}
