diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/usb/image/microtek.c | 810 |
1 files changed, 810 insertions, 0 deletions
diff --git a/drivers/usb/image/microtek.c b/drivers/usb/image/microtek.c new file mode 100644 index 000000000..874ea4b54 --- /dev/null +++ b/drivers/usb/image/microtek.c @@ -0,0 +1,810 @@ +// SPDX-License-Identifier: GPL-2.0 +/* 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-existent 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/slab.h> +#include <linux/spinlock.h> +#include <linux/usb.h> +#include <linux/proc_fs.h> +#include <linux/atomic.h> +#include <linux/blkdev.h> + +#include <scsi/scsi.h> +#include <scsi/scsi_cmnd.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_eh.h> +#include <scsi/scsi_host.h> +#include <scsi/scsi_tcq.h> + +#include "microtek.h" + +#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 const 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__, __func__ ) +#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",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( " %10ph\n", srb->cmnd); +} + +#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; + + MTS_DEBUG_GOT_HERE(); + mts_debug_dump(desc); + + result = usb_lock_device_for_reset(desc->usb_dev, desc->usb_intf); + if (result == 0) { + result = usb_reset_device(desc->usb_dev); + usb_unlock_device(desc->usb_dev); + } + return result ? FAILED : SUCCESS; +} + +static int +mts_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *srb); + +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 + ); + + res = usb_submit_urb( transfer, GFP_ATOMIC ); + if ( unlikely(res) ) { + MTS_INT_ERROR( "could not submit URB! Error was %d\n",(int)res ); + set_host_byte(context->srb, DID_ERROR); + mts_transfer_cleanup(transfer); + } +} + + +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); +} + + +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! */ +{ + int status = transfer->status; + MTS_INT_INIT(); + + if ( context->data_length != transfer->actual_length ) { + scsi_set_resid(context->srb, context->data_length - + transfer->actual_length); + } else if ( unlikely(status) ) { + set_host_byte(context->srb, (status == -ENOENT ? DID_ABORT : DID_ERROR)); + } + + mts_get_status(transfer); +} + + +static void mts_command_done( struct urb *transfer ) +/* Interrupt context! */ +{ + int status = transfer->status; + MTS_INT_INIT(); + + if ( unlikely(status) ) { + if (status == -ENOENT) { + /* We are being killed */ + MTS_DEBUG_GOT_HERE(); + set_host_byte(context->srb, DID_ABORT); + } else { + /* A genuine error has occurred */ + MTS_DEBUG_GOT_HERE(); + + set_host_byte(context->srb, DID_ERROR); + } + 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, + scsi_sg_count(context->srb) > 1 ? + mts_do_sg : mts_data_done); + } else { + mts_get_status(transfer); + } + } +} + +static void mts_do_sg (struct urb* transfer) +{ + int status = transfer->status; + MTS_INT_INIT(); + + MTS_DEBUG("Processing fragment %d of %d\n", context->fragment, + scsi_sg_count(context->srb)); + + if (unlikely(status)) { + set_host_byte(context->srb, (status == -ENOENT ? DID_ABORT : DID_ERROR)); + mts_transfer_cleanup(transfer); + } + + context->curr_sg = sg_next(context->curr_sg); + mts_int_submit_urb(transfer, + context->data_pipe, + sg_virt(context->curr_sg), + context->curr_sg->length, + sg_is_last(context->curr_sg) ? + mts_data_done : mts_do_sg); +} + +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; + + MTS_DEBUG_GOT_HERE(); + + desc->context.instance = desc; + desc->context.srb = srb; + + if (!scsi_bufflen(srb)) { + desc->context.data = NULL; + desc->context.data_length = 0; + return; + } else { + desc->context.curr_sg = scsi_sglist(srb); + desc->context.data = sg_virt(desc->context.curr_sg); + desc->context.data_length = desc->context.curr_sg->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( "transferring 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( "transferring from desc->ep_response == %d\n", + (int)desc->ep_response); + } else { + MTS_DEBUG("transferring 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_lck(struct scsi_cmnd *srb) +{ + mts_scsi_cmnd_callback callback = scsi_done; + struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[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"); + + set_host_byte(srb, DID_BAD_TARGET); + + 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); + set_host_byte(srb, DID_ERROR); + + if(likely(callback != NULL)) + callback(srb); + + } +out: + return 0; +} + +static DEF_SCSI_QCMD(mts_scsi_queuecommand) + +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, + .emulated = 1, + .slave_alloc = mts_slave_alloc, + .slave_configure = mts_slave_configure, + .max_sectors= 256, /* 128 K */ +}; + +/* The entries of microtek_table must correspond, line-by-line to + the entries of mts_supported_products[]. */ + +static const 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 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(); + + /* 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_in_current != &ep_in_set[2]) { + MTS_WARNING("couldn't find two input bulk endpoints. Bailing out.\n"); + return -ENODEV; + } + + 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; + + /* 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, &dev->dev)) { + 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); +} + +module_usb_driver(mts_usb_driver); + +MODULE_AUTHOR( DRIVER_AUTHOR ); +MODULE_DESCRIPTION( DRIVER_DESC ); +MODULE_LICENSE("GPL"); |