307 lines
8.5 KiB
Groff
307 lines
8.5 KiB
Groff
.\" $NetBSD: utoppy.4,v 1.6 2014/03/18 18:20:39 riastradh Exp $
|
|
.\"
|
|
.\" Copyright (c) 2006 The NetBSD Foundation, Inc.
|
|
.\" All rights reserved.
|
|
.\"
|
|
.\" This code is derived from software contributed to The NetBSD Foundation
|
|
.\" by Steve C. Woodford.
|
|
.\"
|
|
.\" Redistribution and use in source and binary forms, with or without
|
|
.\" modification, are permitted provided that the following conditions
|
|
.\" are met:
|
|
.\" 1. Redistributions of source code must retain the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer.
|
|
.\" 2. Redistributions in binary form must reproduce the above copyright
|
|
.\" notice, this list of conditions and the following disclaimer in the
|
|
.\" documentation and/or other materials provided with the distribution.
|
|
.\"
|
|
.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
|
|
.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
|
|
.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
.\" POSSIBILITY OF SUCH DAMAGE.
|
|
.\"
|
|
.Dd April 3, 2006
|
|
.Dt UTOPPY 4
|
|
.Os
|
|
.Sh NAME
|
|
.Nm utoppy
|
|
.Nd USB driver for the Topfield TF5000PVR range of digital video recorders
|
|
.Sh SYNOPSIS
|
|
.Cd "utoppy* at uhub? port ?"
|
|
.Pp
|
|
.In dev/usb/utoppy.h
|
|
.Sh DESCRIPTION
|
|
The
|
|
.Nm
|
|
driver provides support for the Topfield TF5000PVR range of DVB recorders
|
|
(nicknamed
|
|
.Ql Toppy )
|
|
which are popular in Europe and Australia.
|
|
These recorders have a
|
|
.Tn USB
|
|
device interface which can be used to transfer
|
|
recordings to and from the unit's hard disk.
|
|
The
|
|
.Tn USB
|
|
interface can also be used to upload binary images for execution
|
|
on the Toppy's MIPS cpu.
|
|
.Pp
|
|
The Toppy's
|
|
.Tn USB
|
|
protocol has not been officially documented by Topfield,
|
|
but the basic features have been reverse engineered by others in order
|
|
to write replacements for the official
|
|
.Ql Altair
|
|
download/upload program from Topfield.
|
|
.Pp
|
|
Existing replacements for Altair suffer from the fact that they are
|
|
ultimately built on top of
|
|
.Xr ugen 4 .
|
|
This has a number of detrimental side-effects:
|
|
.Bl -enum
|
|
.It
|
|
Performance suffers since all Toppy command packets have to cross the
|
|
user-kernel interface.
|
|
.It
|
|
The userland programs are full of clutter to deal with interpreting the
|
|
command/status packets, not to mention byte-swapping and host endian
|
|
issues.
|
|
.It
|
|
Signals can interrupt a data transfer at a critical point, leaving the
|
|
Toppy in an undefined state.
|
|
For example, interrupting a download with
|
|
.Ql Turbo
|
|
mode enabled will leave the Toppy completely unresponsive to the remote
|
|
control, and prevent timer-based recordings from starting.
|
|
.El
|
|
.Pp
|
|
The
|
|
.Nm
|
|
driver provides a clean and stable interface to the Toppy protocol, and
|
|
ensures that an interrupt caused by a signal does not leave the Toppy in
|
|
an undefined state.
|
|
.Sh UTOPPY INTERFACE
|
|
Use the following header file to get access to the
|
|
.Tn utoppy
|
|
specific structures and defines.
|
|
.Bd -literal
|
|
#include \*[Lt]dev/usb/utoppy.h\*[Gt]
|
|
.Ed
|
|
.Pp
|
|
The
|
|
.Nm
|
|
driver can be accessed through the
|
|
.Pa /dev/utoppyN
|
|
character device.
|
|
The primary means of controlling the driver is by issuing a series of
|
|
.Xr ioctl 2
|
|
system calls followed by
|
|
.Xr read 2
|
|
or
|
|
.Xr write 2
|
|
system calls as appropriate.
|
|
.Pp
|
|
The following
|
|
.Xr ioctl 2
|
|
commands are supported by the
|
|
.Nm
|
|
driver:
|
|
.Bl -tag -width xxxxxx
|
|
.It Dv UTOPPYIOTURBO Fa "int *mode"
|
|
This command can be used to enable or disable
|
|
.Ql Turbo
|
|
mode for subsequent
|
|
.Dv UTOPPYIOREADFILE
|
|
or
|
|
.Dv UTOPPYIOWRITEFILE
|
|
commands (see below).
|
|
If
|
|
.Fa num
|
|
is non-zero, Turbo mode will be enabled.
|
|
Otherwise Turbo mode will be disabled.
|
|
In non-Turbo mode, the Toppy's
|
|
.Tn USB
|
|
interface is capable of sustaining around 5.6 Mbit/s during a file transfer.
|
|
With Turbo mode enabled, it can sustain just over 16 Mbit/s.
|
|
Of course, these figures are valid only if the Toppy is connected via a
|
|
.Tn USB
|
|
2.0 interface.
|
|
Performance using an older
|
|
.Tn USB
|
|
1 interface will be significantly lower.
|
|
.It Dv UTOPPYIOCANCEL Fa void
|
|
This command can be used to abort an in-progress
|
|
.Dv UTOPPYIOREADDIR ,
|
|
.Dv UTOPPYIOREADFILE ,
|
|
or
|
|
.Dv UTOPPYIOWRITEFILE
|
|
command.
|
|
.It Dv UTOPPYIOREBOOT Fa void
|
|
This command will cause the Toppy to reboot cleanly.
|
|
.It Dv UTOPPYIOSTATS Fa "struct utoppy_stats *stats"
|
|
This command retrieves statistics for the Toppy's hard disk.
|
|
.Bd -literal
|
|
struct utoppy_stats {
|
|
uint64_t us_hdd_size; /* Size of the disk, in bytes */
|
|
uint64_t us_hdd_free; /* Free space, in bytes */
|
|
};
|
|
.Ed
|
|
.It UTOPPYIORENAME Fa "struct utoppy_rename *rename"
|
|
This command is used to rename a file or directory on the Toppy's
|
|
hard disk.
|
|
The full pathname to each file must be provided.
|
|
.Bd -literal
|
|
struct utoppy_rename {
|
|
char *ur_old_path; /* Path to existing file */
|
|
char *ur_new_path; /* Path to new file */
|
|
};
|
|
.Ed
|
|
.It UTOPPYIOMKDIR Fa "char *path"
|
|
This command creates the directory specified by
|
|
.Fa path .
|
|
.It UTOPPYIODELETE Fa "char *path"
|
|
This command deletes the file or directory specified by
|
|
.Fa path .
|
|
.It UTOPPYIOREADDIR Fa "char *path"
|
|
This command initiates a read of the contents of the directory specified by
|
|
.Fa path .
|
|
After issuing this command, the directory contents must be read using
|
|
consecutive
|
|
.Xr read 2
|
|
system calls.
|
|
Each
|
|
.Xr read 2
|
|
will transfer one or more directory entries into the user-supplied buffer.
|
|
The buffer must be large enough to receive at least one directory entry.
|
|
When
|
|
.Xr read 2
|
|
returns zero, all directory entries have been read.
|
|
.Pp
|
|
A directory entry is described using the following data structure:
|
|
.Bd -literal
|
|
struct utoppy_dirent {
|
|
char ud_path[UTOPPY_MAX_FILENAME_LEN + 1];
|
|
enum {
|
|
UTOPPY_DIRENT_UNKNOWN,
|
|
UTOPPY_DIRENT_DIRECTORY,
|
|
UTOPPY_DIRENT_FILE
|
|
} ud_type;
|
|
off_t ud_size;
|
|
time_t ud_mtime;
|
|
uint32_t ud_attributes;
|
|
};
|
|
.Ed
|
|
.Pp
|
|
The
|
|
.Va ud_path
|
|
field contains the name of the directory entry.
|
|
.Pp
|
|
The
|
|
.Va ud_type
|
|
field specifies whether the entry corresponds to a file or a sub-directory.
|
|
.Pp
|
|
The
|
|
.Va ud_size
|
|
field is valid for files only, and specifies the file's size in bytes.
|
|
.Pp
|
|
The
|
|
.Va ud_mtime
|
|
field describes the file or directory's modification time, specified as
|
|
seconds from the Unix epoch.
|
|
The timestamp is relative to the current timezone, so
|
|
.Xr localtime 3
|
|
can be used to convert it into human readable form.
|
|
Note that the Toppy sets directory timestamps to a predefined value so
|
|
they are not particularly useful.
|
|
.Pp
|
|
The
|
|
.Va ud_attributes
|
|
field is not used at this time.
|
|
.It UTOPPYIOREADFILE Fa "struct utoppy_readfile *"
|
|
This command is used to initiate reading a file from the Toppy's hard disk.
|
|
The full pathname, together with the file offset at which to start reading,
|
|
is specified using the following data structure:
|
|
.Bd -literal
|
|
struct utoppy_readfile {
|
|
char *ur_path;
|
|
off_t ur_offset;
|
|
};
|
|
.Ed
|
|
.Pp
|
|
After issuing this command, the file must be read using consecutive
|
|
.Xr read 2
|
|
system calls.
|
|
When
|
|
.Xr read 2
|
|
returns zero, the entire file has been read.
|
|
.It UTOPPYIOWRITEFILE Fa "struct utoppy_writefile *"
|
|
This command is used to initiate writing to a file on the Toppy's hard disk.
|
|
The file to be written is described using the following data structure:
|
|
.Bd -literal
|
|
struct utoppy_writefile {
|
|
char *uw_path;
|
|
off_t uw_offset;
|
|
off_t uw_size;
|
|
time_t uw_mtime;
|
|
};
|
|
.Ed
|
|
.Pp
|
|
The
|
|
.Va uw_path
|
|
field specifies the full pathname of the file to be written.
|
|
.Pp
|
|
The
|
|
.Va uw_offset
|
|
field specifies the file offset at which to start writing, assuming the file
|
|
already exists.
|
|
Otherwise,
|
|
.Va uw_offset
|
|
must be zero.
|
|
.Pp
|
|
The protocol requires that the Toppy must be informed of a file's size in
|
|
advance of the file being written.
|
|
This is accomplished using the
|
|
.Va uw_size
|
|
field.
|
|
It may be possible to work around this limitation in a future version of
|
|
the driver.
|
|
.Pp
|
|
The
|
|
.Va uw_mtime
|
|
field specifies the file's timestamp expressed as seconds from the Unix epoch
|
|
in the local timezone.
|
|
.El
|
|
.Pp
|
|
Due to limitations with the protocol, a
|
|
.Nm
|
|
device can be opened by only one application at a time.
|
|
Also, only a single
|
|
.Dv UTOPPYIOREADDIR ,
|
|
.Dv UTOPPYIOREADFILE ,
|
|
or
|
|
.Dv UTOPPYIOWRITEFILE
|
|
command can be in progress at any given time.
|
|
.Sh FILES
|
|
.Bl -tag -width /dev/utoppy0 -compact
|
|
.It Pa /dev/utoppy0
|
|
device node
|
|
.El
|
|
.Sh SEE ALSO
|
|
.Xr utoppya 1 ,
|
|
.Xr usb 4
|
|
.Sh HISTORY
|
|
The
|
|
.Nm
|
|
driver
|
|
appeared in
|
|
.Nx 4.0 .
|
|
.Sh AUTHORS
|
|
.An Steve C. Woodford Aq Mt scw@netbsd.org
|