----- Original Message -----
From: "M. Warner Losh" <imp@bsdimp.com>
To: <bensexson@earthlink.net>
Cc: <port-hpcmips@netbsd.org>
Sent: Tuesday, November 19, 2002 10:15 PM
Subject: Re: z50 Internal Modem Device Name


> In message: <OFENLDGAGLHAPKPAANJNCEFECBAA.bensexson@earthlink.net>
>             "Benjamin David Sexson" <bensexson@earthlink.net> writes:
> : The modem uses a Rockwell RP336LD Modem Data Pump (I don't really know
what
> : this means?).  I am guessing that this sends the data to the processor
which
> : then emulates a UART.  So I guess it wouldn't be that easy to port a
> : linmodem to NetBSD.  Anybody have any idea how to start making a driver?
>
> Read the documenation that's included in the Vr4121 :-)
>
> 26.1 General
>
> The core of the HSP unit uses an NEC56K chip made by PCTEL. The main
> functions of this core are as follows:
>
> o "CODEC device control and serial parallel conversion of the CODEC
>   transmit/receive data.
> o "Control of relay lines, hook lines, and other signal lines in the
>   data access arrangement (DAA) block.
>
> Block diagrams of HSP unit and an example of connection between the
> VR4121 and external agents are shown below.
>
> 26.2 Register Set
>
>     The HSP registers are listed below.
>     The data registers can be accessed as the control registers by
> specifying the INDEX number and then reading from or writing to.
>     The HSPINIT register is added for the VR 4121, and other registers
> are original to the NEC56K.
>
> Table 26-1. HSP Registers
>
> Address    R/W Register Symbols Name
> 0x0C000020 R/W HSPINIT          HSP Initialize Register
> 0x0C000022 R/W HSPDATA(7:0)     HSP Data Register L
> 0x0C000023 R/W HSPDATA(15:8)    HSP Data Register H
> 0x0C000024 W HSPINDEX           HSP Index Register
> 0x0C000028 R HSPID(7:0)         HSP ID Register
> 0x0C000029 R HSPPCS(7:0)        HSP I/O Address Program Confirmation
Register
> 0x0C000029 W HSPPCTEL(7:0)      HSP Signature Checking Port
>
> These registers are described in detail below.
>
> etc
>
> D[3] AFESEL CODEC interface mode switch
>     1 : ST7546, STLC7546(SGS), T7525(AT)
>     0 : TLC320C44, TLC320AC01/02(TI)
>
> I don't know if the Rockwell modem data pump is compatible with any of
> the devices listed.
>
> I'd try to get the Vr4111 docs since it is almost identical to the
> Vr4121, but the english translation is a little higher quality.  The
> Vr4131 docs don't have anything on the HSP, since I think that was
> removed from the Vr4131.  I got the above from
> http://www.necelam.com/microprocessors/uPD30121-168.cfm
> and did a small cut and paste.  There seem to be no special Vr4122
> docs.
>
> I don't have a z50, so I can't tell for sure if the IBM uses the HSP
> inside the Vr4121 or not.
>
> Warner
>
>