Linux ACP Modem (Mwave) mini-HOWTO, Mike Sullivan [best summer reads .txt] 📗

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2.4. Runtime

An initialization script has been provided which may be used to to start,

stop, or check the status of the ACP Modem driver and application. It has

been successfully run on the Debian, Slackware, SuSE, and Red Hat

distributions and should run on any of their derivitives. If you are using

the runtime script, it will load the mwave device driver module, configure

the serial port, and start the mwave manager for you. All of the options

which can be passed to the device driver module, along with some options for

the script itself, can be configured by uncommenting and editing the

appropriate variables at the beginning of the script.

The mwaved startup script can be found in the src/mwavem directory of the

source distribution. If you are running the Red Hat distribution, you can

copy the script to your /etc/rc.d/init.d directory and issue the ntsysv

command in order to enable it at boot time. If not using Red Hat, see the

documentation for your distribution for information on how to set this up to

run at boot time.

It is recommended that you use the provided mwaved script. If you are not

using the script, however, the following sections will describe how to

manually start the device driver and application.

2.4.1. Loading the ACP device driver

To load the mwave device driver use

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|insmod mwave |

+---------------------------------------------------------------------------+

or

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|modprobe mwave |

+---------------------------------------------------------------------------+

The following arguments may be supplied with the insmod command:

Note NOTE

� The following arguments are not persistent from boot to boot (i.e. We

are not saving them in the BIOS).

��*�mwave_3780i_irq=5/7/10/11/15

This parameter allows you to configure the IRQ used by the DSP if the DSP IRQ was not set and stored in BIOS by the Thinkpad?? configuration utility.

��*�mwave_3780i_io=0x130/0x350/0x0070/0xDB0

This parameter allows you to configure the I/O range used by the DSP if the DSP I/O range was not set and stored in the BIOS by the Thinkpad?? configuration utility.

��*�mwave_uart_irq=3/4

This parameter allows you to configure the IRQ used by the ACP UART if the Mwave's UART IRQ was not set and stored in BIOS by the Thinkpad?? configuration utility.

��*�mwave_uart_io=0x3f8/0x2f8/0x3E8/0x2E8

This parameter allows you to configure the I/O range used by the ACP UART if the UART I/O range was not set and stored in BIOS by the Thinkpad?? configuration utility.

The following code is an example of how to run DSP using ttyS1 resources:

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|insmod mwave mwave_3780i_irq=10 mwave_3780i_io=0x0130 mwave_uart_irq=3 mwave_uart_io=0x2f8|

+------------------------------------------------------------------------------------------+

Note NOTE

� The mwave is unable to check for resource conflicts. It is your

responsibility to ensure that none of the resources specified conflict with other (commonly PCMCIA) devices.

You can use the tpctl package on Linux or the Thinkpad?? configuration

utility on Windows NT or DOS to manage the configuration of Thinkpad??

related resources.

2.4.2. Running ACP Modem Application

Once the ACP device driver is loaded successfully, use the mwavem command

to execute the application.

Note NOTE

� The location of the mwavem.conf file can be specified as an

argument to the mwavem application. If not specified the default location is assumed to be /usr/local/etc/mwavem.conf unless otherwise changed during the build process.

Setup the serial driver to recognize the UART provided by the ACP driver.

+---------------------------------------------------------------+

|setserial /dev/ttyS0 autoconfig |

+---------------------------------------------------------------+

Note NOTE

� Substitute /dev/ttyS0 to match the serial port you have

configured the DSP to use.

Note NOTE

� You may wish to create a symbolic link from your modem

device to your serial device for convenience. Example: ln -s /dev/ttyS0 /dev/modem

The ACP Modem is now available for use by your favorite dialing application.

Resolving Installation and Configuration Problems

The following sections list solutions to possible problems you may

experience.

3.1. DSP Does Not Start

In order to recognize memory above 64 Meg, it may be necessary to append the

"mem=" option to the kernel command line. If you are using LILO for your boot

loader, you would do this in the lilo.conf file. For example, if you had a

machine with 128 Meg you would type:

+---------------------------------------------------------------------------+

|append="mem=130496K" |

+---------------------------------------------------------------------------+

Note NOTE

� Your statement must reflect 576K less than you actually have. Specifying

the full amount of memory will prevent the DSP from starting. In the above example, the formula used to arrive at the proper number was 1024 * nMB - 576 = nK.

If you forget to run the Thinkpad?? utility to enable the ACP Modem and you

didn't specify any command line arguments when inserting the mwave module (or

it didn't work), you will receive a message in the syslog, similar to the one

below:

ACP Modem, UART settings IRQ 0x3 IO 0x2f8

tp3780::EnableDSP, pSettings->bDSPEnabled 0 failed

Mwave Modem, ERROR cannot Enable DSP error fffffffb

Mwave Modem, ERROR cannot perform Mwave Initialization retval fffffffb

If you receive a message like the one above, check the command line arguments

you provided to insmod.

3.2. Resource Conflicts

The ACP Modem requires the use of system resources for both the DSP and the

UART provided by the ACP chip. For Linux systems, you will specify parameters

to use for the duration of the boot with the insmod mwave command line

parameters listed in Section 2.4.1.

Typically the configured resources are:

For the DSP: IRQ 10, I/O address 0x130-0x13f

For the UART: IRQ 3, I/O address 0x2f8 (if using ttyS1)

IRQ 4, I/O address 0x3f8 (if using ttyS0)

For dual boot systems we recommeded that you use the Thinkpad?? Configuration

Utility on Windows NT or DOS to configure these system resources.

Windows NT Thinkpad Configuration Utility Notes: (Under the Internal Modem --

Advanced selection)

Set IRQ sharing to disabled

Set 1st IRQ to your DSP IRQ (10 is recommened)

Set 2nd IRQ to your UART IRQ (i.e. ttyS1 is equivalent to COM2)

Set the DSP I/O address (0x130 is recommended)

Set the internal modem I/O address to the UART I/O address (i.e. 0x2f8

for COM2)

The DMA address is unused and can be set to anything.

Note NOTE

� You may also specify parameters to use for the duration of the boot by

using the insmod mwave line parameters listed in section Section 2.4.1.

3.3. Not Connecting at Specified Starting Speed

The configured initial connection speed is set to 64000. The modem should

start there and negotiate down to a connection speed based on target modem

and line capabilities. If the modem is unable to connect it may be having

difficulty negotiating with the target