usbhost.tcl

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# {{{  Banner						

#===============================================================================
#
#    usbhost.tcl
#
#    Support for USB testing
#
#===============================================================================
#####ECOSGPLCOPYRIGHTBEGIN####
## -------------------------------------------
## This file is part of eCos, the Embedded Configurable Operating System.
## Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
##
## eCos is free software; you can redistribute it and/or modify it under
## the terms of the GNU General Public License as published by the Free
## Software Foundation; either version 2 or (at your option) any later version.
##
## eCos is distributed in the hope that it will be useful, but WITHOUT ANY
## WARRANTY; without even the implied warranty of MERCHANTABILITY or
## FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
## for more details.
##
## You should have received a copy of the GNU General Public License along
## with eCos; if not, write to the Free Software Foundation, Inc.,
## 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
##
## As a special exception, if other files instantiate templates or use macros
## or inline functions from this file, or you compile this file and link it
## with other works to produce a work based on this file, this file does not
## by itself cause the resulting work to be covered by the GNU General Public
## License. However the source code for this file must still be made available
## in accordance with section (3) of the GNU General Public License.
##
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## this file might be covered by the GNU General Public License.
##
## Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
## at http://sources.redhat.com/ecos/ecos-license/
## -------------------------------------------
#####ECOSGPLCOPYRIGHTEND####
#===============================================================================
######DESCRIPTIONBEGIN####
#
# Author(s):	bartv
# Date:		2001-07-04
# Purpose:      To provide higher-level utility commands for performing
#               USB testing, and to iterate through the various test scripts
#               specified on the command line.
#
#####DESCRIPTIONEND####
#===============================================================================
#

# }}}

# {{{  Endpoint data					

# Given the raw endpoint data provided by the C code, turn
# it something more usable from inside Tcl scripts.
namespace eval usbtest {
    array set control {}

    variable bulk_in_endpoints [list]
    array set bulk_in {}
    variable bulk_out_endpoints [list]
    array set bulk_out {}
    
    variable isochronous_in_endpoints [list]
    array set isochronous_in {}
    variable isochronous_out_endpoints [list]
    array set isochronous_out {}

    variable interrupt_in_endpoints [list]
    array set interrupt_in {}
    variable interrupt_out_endpoints [list]
    array set interrupt_out {}

    for { set i 0 } { $i < $usbtest::endpoint_count } { incr i } {
	switch -- $usbtest::endpoint_data($i,type) {
	    "control" {
		set usbtest::control(min_size) $usbtest::endpoint_data($i,min_size)
		set usbtest::control(max_size) $usbtest::endpoint_data($i,max_size)
	    }

	    "bulk" {
		set number $usbtest::endpoint_data($i,number)
		if { "in" == $usbtest::endpoint_data($i,direction) } {
		    lappend usbtest::bulk_in_endpoints $number
		    set usbtest::bulk_in($number,min_size)		$usbtest::endpoint_data($i,min_size)
		    set usbtest::bulk_in($number,max_size)		$usbtest::endpoint_data($i,max_size)
		    set usbtest::bulk_in($number,max_in_padding)	$usbtest::endpoint_data($i,max_in_padding)
		    set usbtest::bulk_in($number,devtab)		$usbtest::endpoint_data($i,devtab)
		} else {
		    lappend usbtest::bulk_out_endpoints $number
		    set usbtest::bulk_out($number,min_size)		$usbtest::endpoint_data($i,min_size)
		    set usbtest::bulk_out($number,max_size)		$usbtest::endpoint_data($i,max_size)
		    set usbtest::bulk_out($number,devtab)		$usbtest::endpoint_data($i,devtab)
		}
	    }

	    "isochronous" {
		set number $usbtest::endpoint_data($i,number)
		if { "in" == $usbtest::endpoint_data($i,direction) } {
		    lappend usbtest::isochronous_in_endpoints $number
		    set usbtest::isochronous_in($number,min_size)	$usbtest::endpoint_data($i,min_size)
		    set usbtest::isochronous_in($number,max_size)	$usbtest::endpoint_data($i,max_size)
		    set usbtest::isochronous_in($number,devtab)		$usbtest::endpoint_data($i,devtab)
		} else {
		    lappend usbtest::isochronous_out_endpoints $number
		    set usbtest::isochronous_out($number,min_size)	$usbtest::endpoint_data($i,min_size)
		    set usbtest::isochronous_out($number,max_size)	$usbtest::endpoint_data($i,max_size)
		    set usbtest::isochronous_out($number,devtab)	$usbtest::endpoint_data($i,devtab)
		}
	    }

	    "interrupt" {
		set number $usbtest::endpoint_data($i,number)
		if { "in" == $usbtest::endpoint_data($i,direction) } {
		    lappend usbtest::interrupt_in_endpoints $number
		    set usbtest::interrupt_in($number,min_size)		$usbtest::endpoint_data($i,min_size)
		    set usbtest::interrupt_in($number,max_size)		$usbtest::endpoint_data($i,max_size)
		    set usbtest::interrupt_in($number,devtab)		$usbtest::endpoint_data($i,devtab)
		} else {
		    lappend usbtest::interrupt_out_endpoints $number
		    set usbtest::interrupt_out($number,min_size)	$usbtest::endpoint_data($i,min_size)
		    set usbtest::interrupt_out($number,max_size)	$usbtest::endpoint_data($i,max_size)
		    set usbtest::interrupt_out($number,devtab)		$usbtest::endpoint_data($i,devtab)
		}
	    }

	    default {
		puts stderr "Internal error: invalid endpoint type $usbtest::endpoint_data($i,type)"
		exit 1
	    }
	}
    }
}

# }}}
# {{{  Constants					

# The C code expects to receive certain data as simple numbers,
# corresponding to #define's in common.c and elsewhere. Strictly
# speaking it would be better to pass strings to the C code and
# have it do the translation, thus ensuring that these constants
# exist in only one place.

namespace eval usbtest {

    variable _USB_DIR_IN        0x0080
    variable _DATA_NONE		     0
    variable _DATA_BYTE_FILL	     1
    variable _DATA_WORD_FILL	     2
    variable _DATA_BYTE_GEN	     3
    variable _DATA_WORD_GEN	     4
    variable _IO_MECHANISM_USB	     1
    variable _IO_MECHANISM_DEV	     2
}

# It is also desirable to have some constants corresponding
# to common random number generators.
namespace eval usbtest {
    variable MULTIPLIER        1103515245
    variable INCREMENT              12345
}

# }}}
# {{{  Argument processing                              

# ----------------------------------------------------------------------------
# Given a list of arguments of the form "xyzzy=123" or "xyzzy 123", and
# an array arguments containing entries such as arguments(xyzzy) and
# already filled in with default values, update the array using the
# actual arguments
namespace eval usbtest {

    proc process_arguments { list array_ref } {
	upvar $array_ref array
	array set defined_args [list]

	set listlen [llength $list]
	for { set index 0 } { $index < $listlen } { incr index } {
	    set arg [lindex $list $index]
	    set found 0
	    foreach name [array names array] {
		set len [string length $name]
		if { [string equal -length $len $name $arg] } {
		    # Partial match found.
		    if { [string equal $name $arg] } {
			# Exact match found, The value must be the next arg.
			if { [info exists defined_args($name)] } {
			    error "Argument $name should be specified only once"
			}
			incr index
			if { $index >= $listlen } {
			    error "Missing value after argument $name"
			}
			set array($name) [lindex $list $index]
			set found 1
			break
		    }

		    # Not an exact match. Try looking for x=y
		    incr len
		    if { [string equal -length $len "$name=" $arg] } {
			if { [info exists defined_args($name)] } {
			    error "Argument $name should be specified only once"
			}
			set array($name) [string range $arg $len end]
			set found 1
			break
		    }
		}
	    }
	    if { ! $found } {
		error "Invalid argument $arg"
	    }
	}
    }
}

# }}}
# {{{  Starting and ending tests			

# This section deals with starting tests, or cleaning up when the
# tests cannot actually proceed. Also there is some validation,
# for example to make sure that no endpoint number is used for
# multiple tests.

namespace eval usbtest {
    variable results
    variable _tests_submitted 0
    variable _control_endpoint_in_use 0
    variable _in_endpoints_in_use [list]
    variable _out_endpoints_in_use [list]
    
    proc reset { } {
	if { 0 != $usbtest::_tests_submitted } {
	    usbtest::_cancel
	    set usbtest::_tests_submitted 0
	    
	}
	set usbtest::_in_endpoints_in_use [list]
	set usbtest::_out_endpoints_in_use [list]
    }

    proc use_endpoint { endpoint direction } {
	if { 0 == $endpoint } {
	    if { $usbtest::_control_endpoint_in_use } {
		error "Attempt to run multiple tests on the control endpoint"
	    }
	    set usbtest::_control_endpoint_in_use 1
	} else {
	    switch -- $direction {
		"in" {
		    if { -1 != [lsearch -exact $usbtest::_in_endpoints_in_use $endpoint] } {
			error "Attempt to run multiple IN tests on endpoint $endpoint"
		    }
		    lappend usbtest::_in_endpoints_in_use $endpoint
		}

		"out" {
		    if { -1 != [lsearch -exact $usbtest::_out_endpoints_in_use $endpoint] } {
			error "Attempt to run multiple OUT tests on endpoint $endpoint"
		    }