/* Driver for Microtek Scanmaker X6 USB scanner, and possibly others. * * (C) Copyright 2000 John Fremlin * (C) Copyright 2000 Oliver Neukum * * 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 */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "../scsi/scsi.h" #include "../scsi/hosts.h" #include "../scsi/sd.h" #include "microtek.h" /* Constants */ #define MTS_ABORT_TIMEOUT HZ /*jiffies*/ /* Should we do debugging? */ #define MTS_DO_DEBUG /* USB layer driver interface */ static void *mts_usb_probe(struct usb_device *dev, unsigned int interface); static void mts_usb_disconnect(struct usb_device *dev, void *ptr); static struct usb_driver mts_usb_driver = { "microtek", mts_usb_probe, mts_usb_disconnect, { NULL, NULL } /* we need no fops. let gcc fill it */ }; /* Internal driver stuff */ #define MTS_VERSION "0.2.2" #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 = %x context = %x\n",(int)transfer,(int)context ); \ MTS_DEBUG("status = %x data-length = %x sent = %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()\ do {\ context = (struct mts_transfer_context*)transfer->context; \ if (atomic_read(&context->do_abort)) {\ mts_transfer_cleanup(transfer);\ return;\ }\ MTS_DEBUG_INT();\ } while (0) static inline void mts_debug_dump(struct mts_desc* desc) { MTS_DEBUG("desc at 0x%x: halted = %x%x, toggle = %x%x\n", (int)desc,(int)desc->usb_dev->halted[1],(int)desc->usb_dev->halted[0], (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(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]); } static inline int mts_is_aborting(struct mts_desc* desc) { return (atomic_read(&desc->context.do_abort)); } static inline void mts_request_abort(struct mts_desc* desc) { MTS_DEBUG_GOT_HERE(); mts_debug_dump(desc); atomic_set(&desc->context.do_abort,1); } static inline void mts_urb_abort(struct mts_desc* desc) { MTS_DEBUG_GOT_HERE(); mts_debug_dump(desc); if ( desc->urb.status == USB_ST_URB_PENDING ) { usb_unlink_urb( &desc->urb ); } } static inline void mts_wait_abort(struct mts_desc* desc) { mts_request_abort(desc); while( !atomic_read(&desc->lock.count) ) { /* Is there a function to check if the semaphore is locked? */ schedule_timeout( MTS_ABORT_TIMEOUT ); MTS_DEBUG_GOT_HERE(); mts_urb_abort(desc); } } static struct mts_desc * mts_list; /* list of active scanners */ struct semaphore mts_list_semaphore; /* Internal list operations */ static void mts_remove_nolock( struct mts_desc* to_remove ) { MTS_DEBUG( "removing 0x%x from list\n", (int)to_remove ); mts_wait_abort(to_remove); down( &to_remove->lock ); MTS_DEBUG_GOT_HERE(); if ( to_remove != mts_list ) { MTS_DEBUG_GOT_HERE(); if (to_remove->prev && to_remove->next) to_remove->prev->next = to_remove->next; } else { MTS_DEBUG_GOT_HERE(); mts_list = to_remove->next; if (mts_list) { MTS_DEBUG_GOT_HERE(); mts_list->prev = 0; } } if ( to_remove->next ) { MTS_DEBUG_GOT_HERE(); to_remove->next->prev = to_remove->prev; } MTS_DEBUG_GOT_HERE(); scsi_unregister_module(MODULE_SCSI_HA, &(to_remove->ctempl)); kfree( to_remove ); } static void mts_add_nolock( struct mts_desc* to_add ) { MTS_DEBUG( "adding 0x%x to list\n", (int)to_add ); to_add->prev = 0; to_add->next = mts_list; if ( mts_list ) { mts_list->prev = to_add; } mts_list = to_add; } /* SCSI driver interface */ /* scsi related functions - dummies for now mostly */ static int mts_scsi_release(struct Scsi_Host *psh) { MTS_DEBUG_GOT_HERE(); return 0; } static int mts_scsi_abort (Scsi_Cmnd *srb) /* interrupt context (!) */ { struct mts_desc* desc = (struct mts_desc*)(srb->host->hostdata[0]); MTS_DEBUG_GOT_HERE(); mts_request_abort(desc); mts_urb_abort(desc); return SCSI_ABORT_PENDING; } static int mts_scsi_host_reset (Scsi_Cmnd *srb) { struct mts_desc* desc = (struct mts_desc*)(srb->host->hostdata[0]); MTS_DEBUG_GOT_HERE(); mts_debug_dump(desc); usb_reset_device(desc->usb_dev); /*FIXME: untested on new reset code */ return 0; /* RANT why here 0 and not SUCCESS */ } /* the core of the scsi part */ /* faking a detection - which can't fail :-) */ 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; } /* Main entrypoint: SCSI commands are dispatched to here */ static int mts_scsi_queuecommand (Scsi_Cmnd *srb, mts_scsi_cmnd_callback callback ); static void mts_transfer_cleanup( struct urb *transfer ); 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_INT_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_transfer_cleanup( struct urb *transfer ) /* Interrupt context! */ { struct mts_transfer_context* context = (struct mts_transfer_context*)transfer->context; up( &context->instance->lock ); if ( context->final_callback ) context->final_callback(context->srb); } static void mts_transfer_done( struct urb *transfer ) { struct mts_transfer_context* context; MTS_INT_INIT(); context->srb->result &= MTS_SCSI_ERR_MASK; context->srb->result |= (unsigned)context->status<<1; mts_transfer_cleanup(transfer); return; } static void mts_get_status( struct urb *transfer ) /* Interrupt context! */ { struct mts_transfer_context* context; MTS_INT_INIT(); context->state = mts_con_status; mts_int_submit_urb(transfer, usb_rcvbulkpipe(context->instance->usb_dev, context->instance->ep_response), &context->status, 1, mts_transfer_done ); return; } static void mts_data_done( struct urb* transfer ) /* Interrupt context! */ { struct mts_transfer_context* context; MTS_INT_INIT(); if ( context->data_length != transfer->actual_length ) { context->srb->resid = context->data_length - transfer->actual_length; } else if ( transfer->status ) { context->srb->result = DID_ERROR<<16; } mts_get_status(transfer); return; } static void mts_command_done( struct urb *transfer ) /* Interrupt context! */ { struct mts_transfer_context* context; MTS_INT_INIT(); if ( transfer->status ) { context->srb->result = DID_ERROR<<16; mts_transfer_cleanup(transfer); return; } if ( context->data ) { context->state = mts_con_data; mts_int_submit_urb(transfer, context->data_pipe, context->data, context->data_length, mts_data_done); } else mts_get_status(transfer); 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( Scsi_Cmnd *srb, struct mts_desc* desc ) { int pipe; MTS_DEBUG_GOT_HERE(); desc->context.instance = desc; desc->context.srb = srb; desc->context.state = mts_con_command; atomic_set(&desc->context.do_abort,0); if ( !srb->bufflen ){ desc->context.data = 0; desc->context.data_length = 0; return; } else { desc->context.data = srb->buffer; desc->context.data_length = srb->bufflen; } /* 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( 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; } down(&desc->lock); MTS_DEBUG_GOT_HERE(); mts_show_command(srb); 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; desc->urb.timeout = 100; desc->urb.transfer_flags = USB_ASYNC_UNLINK; /* desc->urb.transfer_flags = USB_DISABLE_SPD;*/ 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); goto out; } MTS_DEBUG_GOT_HERE(); out: return err; } /* * this defines our 'host' */ /* NOTE: This is taken from usb-storage, should be right. */ static Scsi_Host_Template mts_scsi_host_template = { name: "microtek", detect: mts_scsi_detect, release: mts_scsi_release, command: 0, queuecommand: mts_scsi_queuecommand, eh_abort_handler: mts_scsi_abort, eh_device_reset_handler:0, eh_bus_reset_handler: 0, eh_host_reset_handler: mts_scsi_host_reset, can_queue: 1, this_id: -1, cmd_per_lun: 1, present: 0, unchecked_isa_dma: FALSE, use_clustering: FALSE, use_new_eh_code: TRUE, emulated: TRUE }; /* USB layer driver interface implementation */ static void mts_usb_disconnect (struct usb_device *dev, void *ptr) { struct mts_desc* to_remove = (struct mts_desc*)ptr; MTS_DEBUG_GOT_HERE(); /* leave the list - lock it */ down(&mts_list_semaphore); mts_remove_nolock(to_remove); up(&mts_list_semaphore); } struct vendor_product { u16 idVendor; u16 idProduct; 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 */ const static struct vendor_product mts_supported_products[] = { { 0x4ce, 0x300,"Phantom 336CX",mts_sup_unknown }, { 0x5da, 0x94,"Phantom 336CX",mts_sup_unknown }, { 0x5da, 0x99,"Scanmaker X6",mts_sup_alpha }, { 0x5da, 0x9a,"Phantom C6",mts_sup_unknown }, { 0x5da, 0xa0,"Phantom 336CX",mts_sup_unknown }, { 0x5da, 0xa3,"ScanMaker V6USL",mts_sup_unknown }, { 0x5da, 0x80a3,"ScanMaker V6USL",mts_sup_unknown }, { 0x5da, 0x80ac,"Scanmaker V6UL",mts_sup_unknown } } ; const static struct vendor_product* mts_last_product = &mts_supported_products[ sizeof(mts_supported_products) / sizeof(struct vendor_product) ]; /* Must never be derefed, points to one after last entry */ static void * mts_usb_probe (struct usb_device *dev, unsigned int interface) { 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(); /* checking IDs */ for( p = mts_supported_products; p != mts_last_product; p++ ) if ( dev->descriptor.idVendor == p->idVendor && dev->descriptor.idProduct == p->idProduct ) goto is_supported; else MTS_DEBUG( "doesn't appear to be model %s\n", p->name ); MTS_DEBUG( "returning NULL: unsupported\n" ); return NULL; is_supported: 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_module(MODULE_SCSI_HA, &(new_desc->ctempl)); /* Will get hit back in microtek_detect by this func */ if ( result ) { MTS_ERROR( "error %d from scsi_register_module! 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; } /* get us noticed by the rest of the kernel */ int __init microtek_drv_init(void) { int result; MTS_DEBUG_GOT_HERE(); init_MUTEX(&mts_list_semaphore); if ((result = usb_register(&mts_usb_driver)) < 0) { MTS_DEBUG("usb_register returned %d\n", result ); return -1; } else { MTS_DEBUG("driver registered.\n"); } return 0; } void __exit microtek_drv_exit(void) { struct mts_desc* next; MTS_DEBUG_GOT_HERE(); usb_deregister(&mts_usb_driver); down(&mts_list_semaphore); while (mts_list) { /* keep track of where the next one is */ next = mts_list->next; mts_remove_nolock( mts_list ); /* advance the list pointer */ mts_list = next; } up(&mts_list_semaphore); } module_init(microtek_drv_init); module_exit(microtek_drv_exit);