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1130b656e5
This will make a number of things easier in the future, as well as (finally!) avoiding the Id-smashing problem which has plagued developers for so long. Boy, I'm glad we're not using sup anymore. This update would have been insane otherwise.
208 lines
7.0 KiB
Plaintext
208 lines
7.0 KiB
Plaintext
<!-- $FreeBSD$ -->
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<!-- The FreeBSD Documentation Project -->
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<!--
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<!DOCTYPE linuxdoc PUBLIC "-//FreeBSD//DTD linuxdoc//EN" [
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<!ENTITY % authors SYSTEM "authors.sgml">
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%authors;
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]>
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-->
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<sect2><heading>Configuring the <tt>sio</tt> driver<label id="sio"></heading>
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<p>The <tt>sio</tt> driver provides support for NS8250-,
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NS16450-, NS16550 and NS16550A-based EIA RS-232C (CCITT
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V.24) communications interfaces. Several multiport
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cards are supported as well. See the <tt>sio(4)</tt>
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manual page for detailed technical documentation.
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<sect3><heading>Digi International (DigiBoard) PC/8</heading>
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<p><em>Contributed by &a.awebster;.<newline>26 August
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1995.</em>
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Here is a config snippet from a machine with
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a Digi International PC/8 with 16550. It has 8 modems connected
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to these 8 lines, and they work just great. Do not
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forget to add <tt>options COM_MULTIPORT</tt> or it
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will not work very well!
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<tscreen><verb>
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device sio4 at isa? port 0x100 tty flags 0xb05
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device sio5 at isa? port 0x108 tty flags 0xb05
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device sio6 at isa? port 0x110 tty flags 0xb05
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device sio7 at isa? port 0x118 tty flags 0xb05
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device sio8 at isa? port 0x120 tty flags 0xb05
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device sio9 at isa? port 0x128 tty flags 0xb05
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device sio10 at isa? port 0x130 tty flags 0xb05
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device sio11 at isa? port 0x138 tty flags 0xb05 irq 9 vector siointr
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</verb></tscreen>
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The trick in setting this up is that the MSB of the
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flags represent the last SIO port, in this case 11 so
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flags are 0xb05.
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<sect3><heading>Boca 16</heading>
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<p><em>Contributed by &a.whiteside;.<newline>26 August
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1995.</em>
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The procedures to make a Boca 16 pord board with
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FreeBSD are pretty straightforward, but you will need
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a couple things to make it work:
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<enum>
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<item>You either need the kernel sources installed
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so you can recompile the necessary options or
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you will need someone else to compile it for you.
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The 2.0.5 default kernel does <bf>not</bf> come with
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multiport support enabled and you will need to add
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a device entry for each port anyways.
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</item>
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<item>Two, you will need to know the interrupt and IO
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setting for your Boca Board so you can set these
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options properly in the kernel.</item>
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</enum>
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One important note - the actual UART chips for the
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Boca 16 are in the connector box, not on the internal
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board itself. So if you have it unplugged, probes of
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those ports will fail. I have never tested booting with
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the box unplugged and plugging it back in, and I
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suggest you do not either.
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If you do not already have a custom kernel
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configuration file set up, refer to <ref
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id="kernelconfig" name="Kernel Configuration"> for
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general procedures. The following are the specifics
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for the Boca 16 board and assume you are using the
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kernel name MYKERNEL and editing with vi.
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<enum>
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<item>Add the line
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<tscreen><verb>
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options COM_MULTIPORT
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</verb></tscreen>
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to the config file.
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</item>
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<item>Where the current <tt>device sio
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<em>xxx</em></tt> lines are, you will need to add
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16 more devices. <em>Only the last device
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includes the interrupt vector for the
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board</em>. (See the <tt>sio(4)</tt> manual page
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for detail as to why.)
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The following example is for a Boca Board with an
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interrupt of 3, and a base IO address 100h. The
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IO address for Each port is +8 hexadecimal from
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the previous port, thus the 100h, 108h, 110h...
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addresses.
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<tscreen><verb>
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device sio1 at isa? port 0x100 tty flags 0x1005
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device sio2 at isa? port 0x108 tty flags 0x1005
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device sio3 at isa? port 0x110 tty flags 0x1005
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device sio4 at isa? port 0x118 tty flags 0x1005
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[...]
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device sio15 at isa? port 0x170 tty flags 0x1005
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device sio16 at isa? port 0x178 tty flags 0x1005 irq 3 vector siointr
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</verb></tscreen>
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The flags entry <em>must</em> be changed from
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this example unless you are using the exact same
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sio assignments. Flags are set according to
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0x<em>MYY</em> where <em>M</em> indicates the
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minor number of the master port (the last port on
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a Boca 16) and <em>YY</em> indicates if FIFO is
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enabled or disabled(enabled), IRQ sharing is
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used(yes) and if there is an AST/4 compatible IRQ
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control register(no).
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In this example,
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<tscreen><verb>
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flags 0x1005
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</verb></tscreen>
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indicates that the master port is sio16. If I
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added another board and assigned sio17 through
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sio28, the flags for all 16 ports on
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<em>that</em> board would be 0x1C05, where 1C
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indicates the minor number of the master port.
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Do not change the 05 setting.</item>
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<item>Save and complete the kernel configuration,
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recompile, install and reboot.
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Presuming you have successfully installed the
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recompiled kernel and have it set to the correct
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address and IRQ, your boot message should
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indicate the successful probe of the Boca ports
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as follows: (obviously the sio numbers, IO and
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IRQ could be different)
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<tscreen><verb>
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sio1 at 0x100-0x107 flags 0x1005 on isa
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sio1: type 16550A (multiport)
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sio2 at 0x108-0x10f flags 0x1005 on isa
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sio2: type 16550A (multiport)
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sio3 at 0x110-0x117 flags 0x1005 on isa
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sio3: type 16550A (multiport)
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sio4 at 0x118-0x11f flags 0x1005 on isa
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sio4: type 16550A (multiport)
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sio5 at 0x120-0x127 flags 0x1005 on isa
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sio5: type 16550A (multiport)
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sio6 at 0x128-0x12f flags 0x1005 on isa
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sio6: type 16550A (multiport)
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sio7 at 0x130-0x137 flags 0x1005 on isa
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sio7: type 16550A (multiport)
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sio8 at 0x138-0x13f flags 0x1005 on isa
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sio8: type 16550A (multiport)
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sio9 at 0x140-0x147 flags 0x1005 on isa
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sio9: type 16550A (multiport)
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sio10 at 0x148-0x14f flags 0x1005 on isa
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sio10: type 16550A (multiport)
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sio11 at 0x150-0x157 flags 0x1005 on isa
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sio11: type 16550A (multiport)
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sio12 at 0x158-0x15f flags 0x1005 on isa
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sio12: type 16550A (multiport)
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sio13 at 0x160-0x167 flags 0x1005 on isa
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sio13: type 16550A (multiport)
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sio14 at 0x168-0x16f flags 0x1005 on isa
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sio14: type 16550A (multiport)
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sio15 at 0x170-0x177 flags 0x1005 on isa
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sio15: type 16550A (multiport)
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sio16 at 0x178-0x17f irq 3 flags 0x1005 on isa
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sio16: type 16550A (multiport master)
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</verb></tscreen>
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If the messages go by too fast to see, <tt>dmesg
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> more</tt> will show you the boot
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messages.</item>
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<item>Next, appropriate entries in <tt>/dev</tt> for the devices
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must be made using the <tt>/dev/MAKEDEV</tt>
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script. After becoming root:
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<tscreen>
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# cd /dev<newline>
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# ./MAKEDEV tty1<newline>
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# ./MAKEDEV cua1<newline>
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<em>(everything in between)</em><newline>
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# ./MAKEDEV ttyg<newline>
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# ./MAKEDEV cuag
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</tscreen>
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If you do not want or need callout devices for some
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reason, you can dispense with making the <tt>cua*</tt>
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devices.</item>
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<item>If you want a quick and sloppy way to make
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sure the devices are working, you can simply plug
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a modem into each port and (as root) <tt>echo at
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> ttyd*</tt> for each device you have
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made. You <em>should</em> see the RX lights flash
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for each working port.</item>
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</enum>
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