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807 lines
23 KiB
807 lines
23 KiB
// SPDX-License-Identifier: GPL-2.0 |
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/* Driver for Microtek Scanmaker X6 USB scanner, and possibly others. |
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* |
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* (C) Copyright 2000 John Fremlin <[email protected]> |
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* (C) Copyright 2000 Oliver Neukum <[email protected]> |
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* |
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* Parts shamelessly stolen from usb-storage and copyright by their |
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* authors. Thanks to Matt Dharm for giving us permission! |
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* |
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* This driver implements a SCSI host controller driver and a USB |
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* device driver. To avoid confusion, all the USB related stuff is |
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* prefixed by mts_usb_ and all the SCSI stuff by mts_scsi_. |
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* |
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* Microtek (www.microtek.com) did not release the specifications for |
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* their USB protocol to us, so we had to reverse engineer them. We |
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* don't know for which models they are valid. |
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* |
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* The X6 USB has three bulk endpoints, one output (0x1) down which |
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* commands and outgoing data are sent, and two input: 0x82 from which |
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* normal data is read from the scanner (in packets of maximum 32 |
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* bytes) and from which the status byte is read, and 0x83 from which |
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* the results of a scan (or preview) are read in up to 64 * 1024 byte |
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* chunks by the Windows driver. We don't know how much it is possible |
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* to read at a time from 0x83. |
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* |
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* It seems possible to read (with URB transfers) everything from 0x82 |
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* in one go, without bothering to read in 32 byte chunks. |
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* |
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* There seems to be an optimisation of a further READ implicit if |
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* you simply read from 0x83. |
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* |
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* Guessed protocol: |
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* |
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* Send raw SCSI command to EP 0x1 |
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* |
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* If there is data to receive: |
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* If the command was READ datatype=image: |
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* Read a lot of data from EP 0x83 |
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* Else: |
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* Read data from EP 0x82 |
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* Else: |
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* If there is data to transmit: |
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* Write it to EP 0x1 |
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* |
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* Read status byte from EP 0x82 |
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* |
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* References: |
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* |
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* The SCSI command set for the scanner is available from |
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* ftp://ftp.microtek.com/microtek/devpack/ |
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* |
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* Microtek NV sent us a more up to date version of the document. If |
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* you want it, just send mail. |
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* |
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* Status: |
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* |
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* Untested with multiple scanners. |
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* Untested on SMP. |
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* Untested on a bigendian machine. |
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* |
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* History: |
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* |
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* 20000417 starting history |
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* 20000417 fixed load oops |
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* 20000417 fixed unload oops |
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* 20000419 fixed READ IMAGE detection |
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* 20000424 started conversion to use URBs |
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* 20000502 handled short transfers as errors |
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* 20000513 rename and organisation of functions (john) |
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* 20000513 added IDs for all products supported by Windows driver (john) |
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* 20000514 Rewrote mts_scsi_queuecommand to use URBs (john) |
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* 20000514 Version 0.0.8j |
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* 20000514 Fix reporting of non-existent devices to SCSI layer (john) |
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* 20000514 Added MTS_DEBUG_INT (john) |
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* 20000514 Changed "usb-microtek" to "microtek" for consistency (john) |
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* 20000514 Stupid bug fixes (john) |
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* 20000514 Version 0.0.9j |
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* 20000515 Put transfer context and URB in mts_desc (john) |
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* 20000515 Added prelim turn off debugging support (john) |
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* 20000515 Version 0.0.10j |
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* 20000515 Fixed up URB allocation (clear URB on alloc) (john) |
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* 20000515 Version 0.0.11j |
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* 20000516 Removed unnecessary spinlock in mts_transfer_context (john) |
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* 20000516 Removed unnecessary up on instance lock in mts_remove_nolock (john) |
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* 20000516 Implemented (badly) scsi_abort (john) |
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* 20000516 Version 0.0.12j |
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* 20000517 Hopefully removed mts_remove_nolock quasideadlock (john) |
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* 20000517 Added mts_debug_dump to print ll USB info (john) |
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* 20000518 Tweaks and documentation updates (john) |
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* 20000518 Version 0.0.13j |
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* 20000518 Cleaned up abort handling (john) |
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* 20000523 Removed scsi_command and various scsi_..._resets (john) |
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* 20000523 Added unlink URB on scsi_abort, now OHCI supports it (john) |
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* 20000523 Fixed last tiresome compile warning (john) |
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* 20000523 Version 0.0.14j (though version 0.1 has come out?) |
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* 20000602 Added primitive reset |
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* 20000602 Version 0.2.0 |
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* 20000603 various cosmetic changes |
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* 20000603 Version 0.2.1 |
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* 20000620 minor cosmetic changes |
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* 20000620 Version 0.2.2 |
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* 20000822 Hopefully fixed deadlock in mts_remove_nolock() |
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* 20000822 Fixed minor race in mts_transfer_cleanup() |
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* 20000822 Fixed deadlock on submission error in queuecommand |
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* 20000822 Version 0.2.3 |
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* 20000913 Reduced module size if debugging is off |
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* 20000913 Version 0.2.4 |
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* 20010210 New abort logic |
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* 20010210 Version 0.3.0 |
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* 20010217 Merged scatter/gather |
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* 20010218 Version 0.4.0 |
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* 20010218 Cosmetic fixes |
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* 20010218 Version 0.4.1 |
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* 20010306 Abort while using scatter/gather |
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* 20010306 Version 0.4.2 |
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* 20010311 Remove all timeouts and tidy up generally (john) |
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* 20010320 check return value of scsi_register() |
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* 20010320 Version 0.4.3 |
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* 20010408 Identify version on module load. |
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* 20011003 Fix multiple requests |
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*/ |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/signal.h> |
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#include <linux/errno.h> |
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#include <linux/random.h> |
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#include <linux/poll.h> |
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#include <linux/slab.h> |
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#include <linux/spinlock.h> |
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#include <linux/usb.h> |
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#include <linux/proc_fs.h> |
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#include <linux/atomic.h> |
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#include <linux/blkdev.h> |
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#include "../../scsi/scsi.h" |
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#include <scsi/scsi_host.h> |
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#include "microtek.h" |
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#define DRIVER_AUTHOR "John Fremlin <[email protected]>, Oliver Neukum <[email protected]>" |
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#define DRIVER_DESC "Microtek Scanmaker X6 USB scanner driver" |
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/* Should we do debugging? */ |
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//#define MTS_DO_DEBUG |
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/* USB layer driver interface */ |
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static int mts_usb_probe(struct usb_interface *intf, |
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const struct usb_device_id *id); |
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static void mts_usb_disconnect(struct usb_interface *intf); |
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static const struct usb_device_id mts_usb_ids[]; |
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static struct usb_driver mts_usb_driver = { |
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.name = "microtekX6", |
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.probe = mts_usb_probe, |
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.disconnect = mts_usb_disconnect, |
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.id_table = mts_usb_ids, |
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}; |
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/* Internal driver stuff */ |
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#define MTS_VERSION "0.4.3" |
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#define MTS_NAME "microtek usb (rev " MTS_VERSION "): " |
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#define MTS_WARNING(x...) \ |
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printk( KERN_WARNING MTS_NAME x ) |
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#define MTS_ERROR(x...) \ |
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printk( KERN_ERR MTS_NAME x ) |
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#define MTS_INT_ERROR(x...) \ |
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MTS_ERROR(x) |
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#define MTS_MESSAGE(x...) \ |
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printk( KERN_INFO MTS_NAME x ) |
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#if defined MTS_DO_DEBUG |
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#define MTS_DEBUG(x...) \ |
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printk( KERN_DEBUG MTS_NAME x ) |
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#define MTS_DEBUG_GOT_HERE() \ |
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MTS_DEBUG("got to %s:%d (%s)\n", __FILE__, (int)__LINE__, __func__ ) |
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#define MTS_DEBUG_INT() \ |
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do { MTS_DEBUG_GOT_HERE(); \ |
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MTS_DEBUG("transfer = 0x%x context = 0x%x\n",(int)transfer,(int)context ); \ |
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MTS_DEBUG("status = 0x%x data-length = 0x%x sent = 0x%x\n",transfer->status,(int)context->data_length, (int)transfer->actual_length ); \ |
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mts_debug_dump(context->instance);\ |
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} while(0) |
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#else |
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#define MTS_NUL_STATEMENT do { } while(0) |
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#define MTS_DEBUG(x...) MTS_NUL_STATEMENT |
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#define MTS_DEBUG_GOT_HERE() MTS_NUL_STATEMENT |
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#define MTS_DEBUG_INT() MTS_NUL_STATEMENT |
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#endif |
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#define MTS_INT_INIT()\ |
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struct mts_transfer_context* context = (struct mts_transfer_context*)transfer->context; \ |
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MTS_DEBUG_INT();\ |
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#ifdef MTS_DO_DEBUG |
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static inline void mts_debug_dump(struct mts_desc* desc) { |
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MTS_DEBUG("desc at 0x%x: toggle = %02x%02x\n", |
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(int)desc, |
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(int)desc->usb_dev->toggle[1],(int)desc->usb_dev->toggle[0] |
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); |
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MTS_DEBUG("ep_out=%x ep_response=%x ep_image=%x\n", |
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usb_sndbulkpipe(desc->usb_dev,desc->ep_out), |
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usb_rcvbulkpipe(desc->usb_dev,desc->ep_response), |
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usb_rcvbulkpipe(desc->usb_dev,desc->ep_image) |
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); |
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} |
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static inline void mts_show_command(struct scsi_cmnd *srb) |
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{ |
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char *what = NULL; |
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switch (srb->cmnd[0]) { |
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case TEST_UNIT_READY: what = "TEST_UNIT_READY"; break; |
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case REZERO_UNIT: what = "REZERO_UNIT"; break; |
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case REQUEST_SENSE: what = "REQUEST_SENSE"; break; |
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case FORMAT_UNIT: what = "FORMAT_UNIT"; break; |
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case READ_BLOCK_LIMITS: what = "READ_BLOCK_LIMITS"; break; |
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case REASSIGN_BLOCKS: what = "REASSIGN_BLOCKS"; break; |
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case READ_6: what = "READ_6"; break; |
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case WRITE_6: what = "WRITE_6"; break; |
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case SEEK_6: what = "SEEK_6"; break; |
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case READ_REVERSE: what = "READ_REVERSE"; break; |
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case WRITE_FILEMARKS: what = "WRITE_FILEMARKS"; break; |
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case SPACE: what = "SPACE"; break; |
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case INQUIRY: what = "INQUIRY"; break; |
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case RECOVER_BUFFERED_DATA: what = "RECOVER_BUFFERED_DATA"; break; |
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case MODE_SELECT: what = "MODE_SELECT"; break; |
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case RESERVE: what = "RESERVE"; break; |
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case RELEASE: what = "RELEASE"; break; |
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case COPY: what = "COPY"; break; |
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case ERASE: what = "ERASE"; break; |
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case MODE_SENSE: what = "MODE_SENSE"; break; |
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case START_STOP: what = "START_STOP"; break; |
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case RECEIVE_DIAGNOSTIC: what = "RECEIVE_DIAGNOSTIC"; break; |
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case SEND_DIAGNOSTIC: what = "SEND_DIAGNOSTIC"; break; |
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case ALLOW_MEDIUM_REMOVAL: what = "ALLOW_MEDIUM_REMOVAL"; break; |
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case SET_WINDOW: what = "SET_WINDOW"; break; |
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case READ_CAPACITY: what = "READ_CAPACITY"; break; |
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case READ_10: what = "READ_10"; break; |
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case WRITE_10: what = "WRITE_10"; break; |
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case SEEK_10: what = "SEEK_10"; break; |
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case WRITE_VERIFY: what = "WRITE_VERIFY"; break; |
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case VERIFY: what = "VERIFY"; break; |
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case SEARCH_HIGH: what = "SEARCH_HIGH"; break; |
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case SEARCH_EQUAL: what = "SEARCH_EQUAL"; break; |
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case SEARCH_LOW: what = "SEARCH_LOW"; break; |
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case SET_LIMITS: what = "SET_LIMITS"; break; |
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case READ_POSITION: what = "READ_POSITION"; break; |
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case SYNCHRONIZE_CACHE: what = "SYNCHRONIZE_CACHE"; break; |
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case LOCK_UNLOCK_CACHE: what = "LOCK_UNLOCK_CACHE"; break; |
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case READ_DEFECT_DATA: what = "READ_DEFECT_DATA"; break; |
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case MEDIUM_SCAN: what = "MEDIUM_SCAN"; break; |
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case COMPARE: what = "COMPARE"; break; |
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case COPY_VERIFY: what = "COPY_VERIFY"; break; |
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case WRITE_BUFFER: what = "WRITE_BUFFER"; break; |
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case READ_BUFFER: what = "READ_BUFFER"; break; |
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case UPDATE_BLOCK: what = "UPDATE_BLOCK"; break; |
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case READ_LONG: what = "READ_LONG"; break; |
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case WRITE_LONG: what = "WRITE_LONG"; break; |
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case CHANGE_DEFINITION: what = "CHANGE_DEFINITION"; break; |
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case WRITE_SAME: what = "WRITE_SAME"; break; |
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case READ_TOC: what = "READ_TOC"; break; |
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case LOG_SELECT: what = "LOG_SELECT"; break; |
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case LOG_SENSE: what = "LOG_SENSE"; break; |
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case MODE_SELECT_10: what = "MODE_SELECT_10"; break; |
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case MODE_SENSE_10: what = "MODE_SENSE_10"; break; |
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case MOVE_MEDIUM: what = "MOVE_MEDIUM"; break; |
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case READ_12: what = "READ_12"; break; |
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case WRITE_12: what = "WRITE_12"; break; |
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case WRITE_VERIFY_12: what = "WRITE_VERIFY_12"; break; |
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case SEARCH_HIGH_12: what = "SEARCH_HIGH_12"; break; |
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case SEARCH_EQUAL_12: what = "SEARCH_EQUAL_12"; break; |
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case SEARCH_LOW_12: what = "SEARCH_LOW_12"; break; |
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case READ_ELEMENT_STATUS: what = "READ_ELEMENT_STATUS"; break; |
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case SEND_VOLUME_TAG: what = "SEND_VOLUME_TAG"; break; |
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case WRITE_LONG_2: what = "WRITE_LONG_2"; break; |
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default: |
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MTS_DEBUG("can't decode command\n"); |
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goto out; |
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break; |
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} |
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MTS_DEBUG( "Command %s (%d bytes)\n", what, srb->cmd_len); |
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out: |
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MTS_DEBUG( " %10ph\n", srb->cmnd); |
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} |
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#else |
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static inline void mts_show_command(struct scsi_cmnd * dummy) |
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{ |
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} |
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static inline void mts_debug_dump(struct mts_desc* dummy) |
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{ |
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} |
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#endif |
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static inline void mts_urb_abort(struct mts_desc* desc) { |
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MTS_DEBUG_GOT_HERE(); |
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mts_debug_dump(desc); |
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usb_kill_urb( desc->urb ); |
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} |
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static int mts_slave_alloc (struct scsi_device *s) |
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{ |
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s->inquiry_len = 0x24; |
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return 0; |
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} |
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static int mts_slave_configure (struct scsi_device *s) |
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{ |
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blk_queue_dma_alignment(s->request_queue, (512 - 1)); |
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return 0; |
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} |
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static int mts_scsi_abort(struct scsi_cmnd *srb) |
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{ |
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struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]); |
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MTS_DEBUG_GOT_HERE(); |
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mts_urb_abort(desc); |
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return FAILED; |
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} |
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static int mts_scsi_host_reset(struct scsi_cmnd *srb) |
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{ |
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struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]); |
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int result; |
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MTS_DEBUG_GOT_HERE(); |
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mts_debug_dump(desc); |
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result = usb_lock_device_for_reset(desc->usb_dev, desc->usb_intf); |
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if (result == 0) { |
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result = usb_reset_device(desc->usb_dev); |
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usb_unlock_device(desc->usb_dev); |
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} |
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return result ? FAILED : SUCCESS; |
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} |
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static int |
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mts_scsi_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *srb); |
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static void mts_transfer_cleanup( struct urb *transfer ); |
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static void mts_do_sg(struct urb * transfer); |
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static inline |
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void mts_int_submit_urb (struct urb* transfer, |
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int pipe, |
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void* data, |
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unsigned length, |
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usb_complete_t callback ) |
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/* Interrupt context! */ |
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/* Holding transfer->context->lock! */ |
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{ |
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int res; |
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MTS_INT_INIT(); |
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usb_fill_bulk_urb(transfer, |
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context->instance->usb_dev, |
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pipe, |
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data, |
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length, |
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callback, |
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context |
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); |
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res = usb_submit_urb( transfer, GFP_ATOMIC ); |
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if ( unlikely(res) ) { |
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MTS_INT_ERROR( "could not submit URB! Error was %d\n",(int)res ); |
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set_host_byte(context->srb, DID_ERROR); |
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mts_transfer_cleanup(transfer); |
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} |
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} |
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static void mts_transfer_cleanup( struct urb *transfer ) |
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/* Interrupt context! */ |
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{ |
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MTS_INT_INIT(); |
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if ( likely(context->final_callback != NULL) ) |
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context->final_callback(context->srb); |
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} |
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static void mts_transfer_done( struct urb *transfer ) |
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{ |
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MTS_INT_INIT(); |
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context->srb->result &= MTS_SCSI_ERR_MASK; |
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context->srb->result |= (unsigned)(*context->scsi_status)<<1; |
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mts_transfer_cleanup(transfer); |
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} |
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static void mts_get_status( struct urb *transfer ) |
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/* Interrupt context! */ |
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{ |
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MTS_INT_INIT(); |
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mts_int_submit_urb(transfer, |
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usb_rcvbulkpipe(context->instance->usb_dev, |
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context->instance->ep_response), |
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context->scsi_status, |
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1, |
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mts_transfer_done ); |
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} |
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static void mts_data_done( struct urb* transfer ) |
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/* Interrupt context! */ |
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{ |
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int status = transfer->status; |
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MTS_INT_INIT(); |
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if ( context->data_length != transfer->actual_length ) { |
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scsi_set_resid(context->srb, context->data_length - |
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transfer->actual_length); |
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} else if ( unlikely(status) ) { |
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set_host_byte(context->srb, (status == -ENOENT ? DID_ABORT : DID_ERROR)); |
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} |
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mts_get_status(transfer); |
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} |
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static void mts_command_done( struct urb *transfer ) |
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/* Interrupt context! */ |
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{ |
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int status = transfer->status; |
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MTS_INT_INIT(); |
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if ( unlikely(status) ) { |
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if (status == -ENOENT) { |
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/* We are being killed */ |
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MTS_DEBUG_GOT_HERE(); |
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set_host_byte(context->srb, DID_ABORT); |
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} else { |
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/* A genuine error has occurred */ |
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MTS_DEBUG_GOT_HERE(); |
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set_host_byte(context->srb, DID_ERROR); |
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} |
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mts_transfer_cleanup(transfer); |
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return; |
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} |
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if (context->srb->cmnd[0] == REQUEST_SENSE) { |
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mts_int_submit_urb(transfer, |
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context->data_pipe, |
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context->srb->sense_buffer, |
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context->data_length, |
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mts_data_done); |
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} else { if ( context->data ) { |
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mts_int_submit_urb(transfer, |
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context->data_pipe, |
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context->data, |
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context->data_length, |
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scsi_sg_count(context->srb) > 1 ? |
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mts_do_sg : mts_data_done); |
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} else { |
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mts_get_status(transfer); |
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} |
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} |
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} |
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static void mts_do_sg (struct urb* transfer) |
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{ |
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int status = transfer->status; |
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MTS_INT_INIT(); |
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MTS_DEBUG("Processing fragment %d of %d\n", context->fragment, |
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scsi_sg_count(context->srb)); |
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if (unlikely(status)) { |
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set_host_byte(context->srb, (status == -ENOENT ? DID_ABORT : DID_ERROR)); |
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mts_transfer_cleanup(transfer); |
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} |
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context->curr_sg = sg_next(context->curr_sg); |
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mts_int_submit_urb(transfer, |
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context->data_pipe, |
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sg_virt(context->curr_sg), |
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context->curr_sg->length, |
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sg_is_last(context->curr_sg) ? |
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mts_data_done : mts_do_sg); |
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} |
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static const u8 mts_read_image_sig[] = { 0x28, 00, 00, 00 }; |
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static const u8 mts_read_image_sig_len = 4; |
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static const unsigned char mts_direction[256/8] = { |
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0x28, 0x81, 0x14, 0x14, 0x20, 0x01, 0x90, 0x77, |
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0x0C, 0x20, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, |
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 |
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}; |
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#define MTS_DIRECTION_IS_IN(x) ((mts_direction[x>>3] >> (x & 7)) & 1) |
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static void |
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mts_build_transfer_context(struct scsi_cmnd *srb, struct mts_desc* desc) |
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{ |
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int pipe; |
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MTS_DEBUG_GOT_HERE(); |
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|
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desc->context.instance = desc; |
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desc->context.srb = srb; |
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|
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if (!scsi_bufflen(srb)) { |
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desc->context.data = NULL; |
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desc->context.data_length = 0; |
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return; |
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} else { |
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desc->context.curr_sg = scsi_sglist(srb); |
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desc->context.data = sg_virt(desc->context.curr_sg); |
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desc->context.data_length = desc->context.curr_sg->length; |
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} |
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/* can't rely on srb->sc_data_direction */ |
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|
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/* Brutally ripped from usb-storage */ |
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if ( !memcmp( srb->cmnd, mts_read_image_sig, mts_read_image_sig_len ) |
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) { pipe = usb_rcvbulkpipe(desc->usb_dev,desc->ep_image); |
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MTS_DEBUG( "transferring from desc->ep_image == %d\n", |
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(int)desc->ep_image ); |
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} else if ( MTS_DIRECTION_IS_IN(srb->cmnd[0]) ) { |
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pipe = usb_rcvbulkpipe(desc->usb_dev,desc->ep_response); |
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MTS_DEBUG( "transferring from desc->ep_response == %d\n", |
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(int)desc->ep_response); |
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} else { |
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MTS_DEBUG("transferring to desc->ep_out == %d\n", |
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(int)desc->ep_out); |
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pipe = usb_sndbulkpipe(desc->usb_dev,desc->ep_out); |
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} |
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desc->context.data_pipe = pipe; |
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} |
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static int |
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mts_scsi_queuecommand_lck(struct scsi_cmnd *srb, mts_scsi_cmnd_callback callback) |
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{ |
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struct mts_desc* desc = (struct mts_desc*)(srb->device->host->hostdata[0]); |
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int res; |
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MTS_DEBUG_GOT_HERE(); |
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mts_show_command(srb); |
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mts_debug_dump(desc); |
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if ( srb->device->lun || srb->device->id || srb->device->channel ) { |
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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 ); |
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MTS_DEBUG("this device doesn't exist\n"); |
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set_host_byte(srb, DID_BAD_TARGET); |
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if(likely(callback != NULL)) |
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callback(srb); |
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goto out; |
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} |
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|
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usb_fill_bulk_urb(desc->urb, |
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desc->usb_dev, |
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usb_sndbulkpipe(desc->usb_dev,desc->ep_out), |
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srb->cmnd, |
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srb->cmd_len, |
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mts_command_done, |
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&desc->context |
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); |
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mts_build_transfer_context( srb, desc ); |
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desc->context.final_callback = callback; |
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|
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/* here we need ATOMIC as we are called with the iolock */ |
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res=usb_submit_urb(desc->urb, GFP_ATOMIC); |
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|
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if(unlikely(res)){ |
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MTS_ERROR("error %d submitting URB\n",(int)res); |
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set_host_byte(srb, DID_ERROR); |
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|
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if(likely(callback != NULL)) |
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callback(srb); |
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} |
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out: |
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return 0; |
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} |
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static DEF_SCSI_QCMD(mts_scsi_queuecommand) |
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static struct scsi_host_template mts_scsi_host_template = { |
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.module = THIS_MODULE, |
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.name = "microtekX6", |
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.proc_name = "microtekX6", |
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.queuecommand = mts_scsi_queuecommand, |
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.eh_abort_handler = mts_scsi_abort, |
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.eh_host_reset_handler = mts_scsi_host_reset, |
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.sg_tablesize = SG_ALL, |
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.can_queue = 1, |
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.this_id = -1, |
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.emulated = 1, |
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.slave_alloc = mts_slave_alloc, |
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.slave_configure = mts_slave_configure, |
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.max_sectors= 256, /* 128 K */ |
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}; |
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|
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/* The entries of microtek_table must correspond, line-by-line to |
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the entries of mts_supported_products[]. */ |
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|
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static const struct usb_device_id mts_usb_ids[] = |
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{ |
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{ USB_DEVICE(0x4ce, 0x0300) }, |
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{ USB_DEVICE(0x5da, 0x0094) }, |
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{ USB_DEVICE(0x5da, 0x0099) }, |
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{ USB_DEVICE(0x5da, 0x009a) }, |
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{ USB_DEVICE(0x5da, 0x00a0) }, |
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{ USB_DEVICE(0x5da, 0x00a3) }, |
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{ USB_DEVICE(0x5da, 0x80a3) }, |
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{ USB_DEVICE(0x5da, 0x80ac) }, |
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{ USB_DEVICE(0x5da, 0x00b6) }, |
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{ } /* Terminating entry */ |
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}; |
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|
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MODULE_DEVICE_TABLE (usb, mts_usb_ids); |
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static int mts_usb_probe(struct usb_interface *intf, |
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const struct usb_device_id *id) |
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{ |
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int i; |
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int ep_out = -1; |
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int ep_in_set[3]; /* this will break if we have more than three endpoints |
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which is why we check */ |
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int *ep_in_current = ep_in_set; |
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int err_retval = -ENOMEM; |
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|
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struct mts_desc * new_desc; |
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struct usb_device *dev = interface_to_usbdev (intf); |
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|
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/* the current altsetting on the interface we're probing */ |
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struct usb_host_interface *altsetting; |
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|
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MTS_DEBUG_GOT_HERE(); |
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MTS_DEBUG( "usb-device descriptor at %x\n", (int)dev ); |
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|
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MTS_DEBUG( "product id = 0x%x, vendor id = 0x%x\n", |
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le16_to_cpu(dev->descriptor.idProduct), |
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le16_to_cpu(dev->descriptor.idVendor) ); |
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|
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MTS_DEBUG_GOT_HERE(); |
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|
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/* the current altsetting on the interface we're probing */ |
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altsetting = intf->cur_altsetting; |
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|
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/* Check if the config is sane */ |
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|
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if ( altsetting->desc.bNumEndpoints != MTS_EP_TOTAL ) { |
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MTS_WARNING( "expecting %d got %d endpoints! Bailing out.\n", |
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(int)MTS_EP_TOTAL, (int)altsetting->desc.bNumEndpoints ); |
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return -ENODEV; |
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} |
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|
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for( i = 0; i < altsetting->desc.bNumEndpoints; i++ ) { |
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if ((altsetting->endpoint[i].desc.bmAttributes & |
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USB_ENDPOINT_XFERTYPE_MASK) != USB_ENDPOINT_XFER_BULK) { |
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|
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MTS_WARNING( "can only deal with bulk endpoints; endpoint %d is not bulk.\n", |
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(int)altsetting->endpoint[i].desc.bEndpointAddress ); |
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} else { |
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if (altsetting->endpoint[i].desc.bEndpointAddress & |
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USB_DIR_IN) |
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*ep_in_current++ |
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= altsetting->endpoint[i].desc.bEndpointAddress & |
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USB_ENDPOINT_NUMBER_MASK; |
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else { |
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if ( ep_out != -1 ) { |
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MTS_WARNING( "can only deal with one output endpoints. Bailing out." ); |
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return -ENODEV; |
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} |
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|
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ep_out = altsetting->endpoint[i].desc.bEndpointAddress & |
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USB_ENDPOINT_NUMBER_MASK; |
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} |
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} |
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} |
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if (ep_in_current != &ep_in_set[2]) { |
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MTS_WARNING("couldn't find two input bulk endpoints. Bailing out.\n"); |
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return -ENODEV; |
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} |
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if ( ep_out == -1 ) { |
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MTS_WARNING( "couldn't find an output bulk endpoint. Bailing out.\n" ); |
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return -ENODEV; |
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} |
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new_desc = kzalloc(sizeof(struct mts_desc), GFP_KERNEL); |
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if (!new_desc) |
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goto out; |
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new_desc->urb = usb_alloc_urb(0, GFP_KERNEL); |
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if (!new_desc->urb) |
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goto out_kfree; |
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new_desc->context.scsi_status = kmalloc(1, GFP_KERNEL); |
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if (!new_desc->context.scsi_status) |
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goto out_free_urb; |
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|
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new_desc->usb_dev = dev; |
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new_desc->usb_intf = intf; |
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|
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/* endpoints */ |
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new_desc->ep_out = ep_out; |
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new_desc->ep_response = ep_in_set[0]; |
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new_desc->ep_image = ep_in_set[1]; |
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|
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if ( new_desc->ep_out != MTS_EP_OUT ) |
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MTS_WARNING( "will this work? Command EP is not usually %d\n", |
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(int)new_desc->ep_out ); |
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|
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if ( new_desc->ep_response != MTS_EP_RESPONSE ) |
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MTS_WARNING( "will this work? Response EP is not usually %d\n", |
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(int)new_desc->ep_response ); |
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|
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if ( new_desc->ep_image != MTS_EP_IMAGE ) |
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MTS_WARNING( "will this work? Image data EP is not usually %d\n", |
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(int)new_desc->ep_image ); |
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new_desc->host = scsi_host_alloc(&mts_scsi_host_template, |
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sizeof(new_desc)); |
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if (!new_desc->host) |
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goto out_kfree2; |
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new_desc->host->hostdata[0] = (unsigned long)new_desc; |
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if (scsi_add_host(new_desc->host, &dev->dev)) { |
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err_retval = -EIO; |
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goto out_host_put; |
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} |
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scsi_scan_host(new_desc->host); |
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usb_set_intfdata(intf, new_desc); |
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return 0; |
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out_host_put: |
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scsi_host_put(new_desc->host); |
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out_kfree2: |
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kfree(new_desc->context.scsi_status); |
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out_free_urb: |
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usb_free_urb(new_desc->urb); |
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out_kfree: |
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kfree(new_desc); |
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out: |
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return err_retval; |
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} |
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|
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static void mts_usb_disconnect (struct usb_interface *intf) |
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{ |
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struct mts_desc *desc = usb_get_intfdata(intf); |
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|
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usb_set_intfdata(intf, NULL); |
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|
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usb_kill_urb(desc->urb); |
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scsi_remove_host(desc->host); |
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|
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scsi_host_put(desc->host); |
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usb_free_urb(desc->urb); |
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kfree(desc->context.scsi_status); |
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kfree(desc); |
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} |
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|
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module_usb_driver(mts_usb_driver); |
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|
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MODULE_AUTHOR( DRIVER_AUTHOR ); |
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MODULE_DESCRIPTION( DRIVER_DESC ); |
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MODULE_LICENSE("GPL");
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