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"
17 The Specialix SI/XIO and SX hardware makes up an 8 to 32 port RS-232 serial
20 The system uses two components: a "Host adapter", which is plugged into
21 an ISA, EISA or PCI slot and provides intelligence and buffering/processing
22 capabilities, as well as an external bus in the form of a 37 pin cable.
24 On this cable, "modules" are connected.
25 The "SI" module comes in a 4 and 8 port version.
26 The "XIO" and "SX" modules come only in
29 The host adapter polls and transfers data between the modules and the rest
31 The Host adapter provides a 256 byte transmit and 256 byte
32 receive FIFO for each of the 32 ports that it can maintain.
34 The XIO modules can operate each of their 8 ports at 115,200 baud.
35 The SI version can run at 57,600 baud.
36 The SX modules can operate each of their
37 8 ports at up to 921,600 baud.
39 SX modules are only supported when connected to an SX host card.
41 XIO modules are supported on any host card.
43 The host adapter uses a shared memory block in the traditional ISA bus
44 "hole" between 0xA0000 and 0xEFFFF.
45 The adapter can be configured outside
46 range, but requires the memory range to be explicitly non-cached.
47 The driver does not yet support this mode of operation.
49 SX ISA Host cards have an 8/16 bit mode switch or jumper on them.
51 or jumper MUST be set for 8 bit mode.
53 The ISA adapters can use Irq's 11, 12 or 15 (and 9 and 10 in the case of
56 The si device driver may have some of its configuration settings changed
61 The si device driver also responds to the
63 utility for configuring drain-on-close timeouts.
65 The driver also defines 3 sysctl variables that can be manipulated:
66 machdep.si_debug sets the debug level for the whole driver.
68 on the driver being compiled with SI_DEBUG.
70 sets how often per second the driver polls for lost interrupts.
71 machdep.si_realpoll sets whether or not the card will treat the
72 poll intervals as if they were interrupts.
74 An open on a /dev device node controlled by the si driver obeys the same
78 It fully supports the usual semantics of the cua ports, and the
79 "initial termios" and "locked termios" settings.
80 In summary, an open on a
81 tty port will block until DCD is raised, unless O_NONBLOCK is specified.
83 An open on a cua port will always succeed, but DCD
84 transitions will be honored after DCD rises for the first time.
86 Up to four SI/XIO host cards may be controlled by the si driver.
87 Due to the lack of available interrupts, only 3 ISA SI/XIO host cards can be
90 The lowest 5 bits of the minor device number are used to select the port
91 number on the module cluster.
92 The next 2 bits select which of 4 host adapter
94 This allows a maximum of 128 ports on this driver.
96 Bit 7 is used to differentiate a tty/dialin port (bit 7=0) and a
97 cua/callout port (bit 7=1).
101 are unavailable as they are a shadow of the
104 If bit 16 is a 1, the device node is referring to the "initial state" device.
105 This "initial state" is used to prime the
107 settings of the device when it is initially opened.
108 If bit 17 is a 1, the device node is referring to the "locked state" device.
109 The "locked state" is used to prevent the
111 settings from being changed.
113 To manipulate the initial/locked settings, the
116 When setting the "locked" variables, enabling the mode
117 on the lock device will lock the termios mode, while disabling the mode will
120 .Bl -tag -width /dev/si_control -compact
121 .It Pa /dev/si_control
122 global driver control file for
125 terminal/dialin ports
129 initial termios state devices
131 locked termios state devices
133 initial termios state devices for dialout ports
135 locked termios state devices for dialout ports
145 This driver is loosely based on driver code originating at Specialix, which
146 was ported to run on BSDI by
147 .An Andy Rutter Aq andy@specialix.co.uk .
148 The System V driver source is/was available by ftp from
149 .Sy ftp.specialix.co.uk .
151 This driver is not supported by Specialix International.
154 .An Peter Wemm Aq peter@netplex.com.au
155 obtained the code from
159 and threw the man page together.
160 .An Bruce Evans Aq bde@zeta.org.au
161 provided a large amount of assistance during porting.
162 .An Nick Sayer Aq nick@specialix.com
163 wrote the EISA, PCI and SX portions.
165 The interrupt tuning rate is not believed to be optimal at this time for
168 Polled mode (a feature of standard Specialix drivers) is not implemented,
169 but it can be approximated by turning on machdep.si_realpoll.
171 frequency is set by machdep.si_pollrate (in units of 1/100th of a second).
173 The driver does not yet support baud rates higher than 115,200 on SX
176 Operation outside the traditional ISA "hole" is not yet supported, although it
177 should work if the test is removed from the probe routine.
179 Multiple host cards are supported although combinations of hosts on
180 different bus types have not been tested - device numbering is known to
181 be a problem and may lead to unexpected results.