7 .Nd "driver for Specialix International SI/XIO or SX intelligent serial card"
11 For ISA host cards put the following lines in
12 .Pa /boot/device.hints :
13 .Cd hint.si.0.at="isa"
14 .Cd hint.si.0.maddr="0xd0000"
15 .Cd hint.si.0.irq="12"
16 .Sh DEPRECATION NOTICE
19 driver will be removed in
22 The Specialix SI/XIO and SX hardware makes up an 8 to 32 port RS-232 serial
25 The system uses two components: a "Host adapter", which is plugged into
26 an ISA, EISA or PCI slot and provides intelligence and buffering/processing
27 capabilities, as well as an external bus in the form of a 37 pin cable.
29 On this cable, "modules" are connected.
30 The "SI" module comes in a 4 and 8 port version.
31 The "XIO" and "SX" modules come only in
34 The host adapter polls and transfers data between the modules and the rest
36 The Host adapter provides a 256 byte transmit and 256 byte
37 receive FIFO for each of the 32 ports that it can maintain.
39 The XIO modules can operate each of their 8 ports at 115,200 baud.
40 The SI version can run at 57,600 baud.
41 The SX modules can operate each of their
42 8 ports at up to 921,600 baud.
44 SX modules are only supported when connected to an SX host card.
46 XIO modules are supported on any host card.
48 The host adapter uses a shared memory block in the traditional ISA bus
49 "hole" between 0xA0000 and 0xEFFFF.
50 The adapter can be configured outside
51 range, but requires the memory range to be explicitly non-cached.
52 The driver does not yet support this mode of operation.
54 SX ISA Host cards have an 8/16 bit mode switch or jumper on them.
56 or jumper MUST be set for 8 bit mode.
58 The ISA adapters can use Irq's 11, 12 or 15 (and 9 and 10 in the case of
61 The si device driver may have some of its configuration settings changed
66 The si device driver also responds to the
68 utility for configuring drain-on-close timeouts.
70 The driver also defines 3 sysctl variables that can be manipulated:
71 machdep.si_debug sets the debug level for the whole driver.
73 on the driver being compiled with SI_DEBUG.
75 sets how often per second the driver polls for lost interrupts.
76 machdep.si_realpoll sets whether or not the card will treat the
77 poll intervals as if they were interrupts.
79 An open on a /dev device node controlled by the si driver obeys the same
83 It fully supports the usual semantics of the cua ports, and the
84 "initial termios" and "locked termios" settings.
85 In summary, an open on a
86 tty port will block until DCD is raised, unless O_NONBLOCK is specified.
88 An open on a cua port will always succeed, but DCD
89 transitions will be honored after DCD rises for the first time.
91 Up to four SI/XIO host cards may be controlled by the si driver.
92 Due to the lack of available interrupts, only 3 ISA SI/XIO host cards can be
95 The lowest 5 bits of the minor device number are used to select the port
96 number on the module cluster.
97 The next 2 bits select which of 4 host adapter
99 This allows a maximum of 128 ports on this driver.
101 Bit 7 is used to differentiate a tty/dialin port (bit 7=0) and a
102 cua/callout port (bit 7=1).
106 are unavailable as they are a shadow of the
109 If bit 16 is a 1, the device node is referring to the "initial state" device.
110 This "initial state" is used to prime the
112 settings of the device when it is initially opened.
113 If bit 17 is a 1, the device node is referring to the "locked state" device.
114 The "locked state" is used to prevent the
116 settings from being changed.
118 To manipulate the initial/locked settings, the
121 When setting the "locked" variables, enabling the mode
122 on the lock device will lock the termios mode, while disabling the mode will
125 .Bl -tag -width /dev/si_control -compact
126 .It Pa /dev/si_control
127 global driver control file for
130 terminal/dialin ports
134 initial termios state devices
136 locked termios state devices
138 initial termios state devices for dialout ports
140 locked termios state devices for dialout ports
150 This driver is loosely based on driver code originating at Specialix, which
151 was ported to run on BSDI by
152 .An Andy Rutter Aq andy@specialix.co.uk .
153 The System V driver source is/was available by ftp from
154 .Sy ftp.specialix.co.uk .
156 This driver is not supported by Specialix International.
159 .An Peter Wemm Aq peter@netplex.com.au
160 obtained the code from
164 and threw the man page together.
165 .An Bruce Evans Aq bde@zeta.org.au
166 provided a large amount of assistance during porting.
167 .An Nick Sayer Aq nick@specialix.com
168 wrote the EISA, PCI and SX portions.
170 The interrupt tuning rate is not believed to be optimal at this time for
173 Polled mode (a feature of standard Specialix drivers) is not implemented,
174 but it can be approximated by turning on machdep.si_realpoll.
176 frequency is set by machdep.si_pollrate (in units of 1/100th of a second).
178 The driver does not yet support baud rates higher than 115,200 on SX
181 Operation outside the traditional ISA "hole" is not yet supported, although it
182 should work if the test is removed from the probe routine.
184 Multiple host cards are supported although combinations of hosts on
185 different bus types have not been tested - device numbering is known to
186 be a problem and may lead to unexpected results.