linux-imx

/* 

        pd.c    (c) 1997-8  Grant R. Guenther <grant@torque.net>

                            Under the terms of the GNU General Public License.

​

        This is the high-level driver for parallel port IDE hard

        drives based on chips supported by the paride module.

​

    By default, the driver will autoprobe for a single parallel

    port IDE drive, but if their individual parameters are

        specified, the driver can handle up to 4 drives.

​

        The behaviour of the pd driver can be altered by setting

        some parameters from the insmod command line.  The following

        parameters are adjustable:

        drive0      These four arguments can be arrays of       

        drive1  1-8 integers as follows:

        drive2

        drive3  <prt>,<pro>,<uni>,<mod>,<geo>,<sby>,<dly>,<slv>

​

            Where,

​

        <prt>   is the base of the parallel port address for

            the corresponding drive.  (required)

​

        <pro>   is the protocol number for the adapter that

            supports this drive.  These numbers are

                        logged by 'paride' when the protocol modules

            are initialised.  (0 if not given)

​

        <uni>   for those adapters that support chained

            devices, this is the unit selector for the

                chain of devices on the given port.  It should

            be zero for devices that don't support chaining.

            (0 if not given)

​

        <mod>   this can be -1 to choose the best mode, or one

                of the mode numbers supported by the adapter.

            (-1 if not given)

​

        <geo>   this defaults to 0 to indicate that the driver

            should use the CHS geometry provided by the drive

            itself.  If set to 1, the driver will provide

            a logical geometry with 64 heads and 32 sectors

            per track, to be consistent with most SCSI

                drivers.  (0 if not given)

​

        <sby>   set this to zero to disable the power saving

            standby mode, if needed.  (1 if not given)

​

        <dly>   some parallel ports require the driver to 

            go more slowly.  -1 sets a default value that

            should work with the chosen protocol.  Otherwise,

            set this to a small integer, the larger it is

            the slower the port i/o.  In some cases, setting

            this to zero will speed up the device. (default -1)

​

        <slv>   IDE disks can be jumpered to master or slave.

                        Set this to 0 to choose the master drive, 1 to

                        choose the slave, -1 (the default) to choose the

                        first drive found.

​

            major       You may use this parameter to override the

                        default major number (45) that this driver

                        will use.  Be sure to change the device

                        name as well.

​

            name        This parameter is a character string that

                        contains the name the kernel will use for this

                        device (in /proc output, for instance).

            (default "pd")

​

        cluster The driver will attempt to aggregate requests

            for adjacent blocks into larger multi-block

            clusters.  The maximum cluster size (in 512

            byte sectors) is set with this parameter.

            (default 64)

​

        verbose This parameter controls the amount of logging

            that the driver will do.  Set it to 0 for 

            normal operation, 1 to see autoprobe progress

            messages, or 2 to see additional debugging

            output.  (default 0)

​

            nice        This parameter controls the driver's use of

                        idle CPU time, at the expense of some speed.

​

        If this driver is built into the kernel, you can use kernel

        the following command line parameters, with the same values

        as the corresponding module parameters listed above:

​