ref: c116550e6a41572796e4db65e4f6acbcb3d9d6f8
dir: /appl/lib/usb/usbmct.b/
#
# Copyright © 2002 Vita Nuova Holdings Limited
#
implement UsbDriver;
# MCT RS232 USB driver
# 'Documentation' mined from NetBSD
include "sys.m";
sys: Sys;
include "usb.m";
usb: Usb;
UMCT_SET_REQUEST: con 1640;
REQ_SET_BAUD_RATE: con 5;
REQ_SET_LCR: con 7;
LCR_SET_BREAK: con 16r40;
LCR_PARITY_EVEN: con 16r18;
LCR_PARITY_ODD: con 16r08;
LCR_PARITY_NONE: con 16r00;
LCR_DATA_BITS_5, LCR_DATA_BITS_6, LCR_DATA_BITS_7, LCR_DATA_BITS_8: con iota;
LCR_STOP_BITS_2: con 16r04;
LCR_STOP_BITS_1: con 16r00;
setupfd: ref Sys->FD;
debug: con 1;
ioreaderpid, statusreaderpid: int;
kill(pid: int): int
{
fd := sys->open("/prog/"+string pid+"/ctl", Sys->OWRITE);
if (fd == nil)
return -1;
if (sys->write(fd, array of byte "kill", 4) != 4)
return -1;
return 0;
}
ioreader(pidc: chan of int, fd: ref Sys->FD)
{
pid := sys->pctl(0, nil);
pidc <-= pid;
buf := array [256] of byte;
while ((n := sys->read(fd, buf, len buf)) >= 0)
{
sys->print("[%d]\n", n);
sys->write(sys->fildes(1), buf, n);
}
ioreaderpid = -1;
}
statusreader(pidc: chan of int, fd: ref Sys->FD)
{
pid := sys->pctl(0, nil);
pidc <-= pid;
buf := array [2] of byte;
while ((n := sys->read(fd, buf, len buf)) >= 0)
{
sys->print("S(%d)%.2ux%.2ux\n", n, int buf[0], int buf[1]);
}
statusreaderpid = -1;
}
set_baud_rate(baud: int)
{
buf := array [1] of byte;
val := 12;
case baud {
300 => val = 1;
1200 => val = 3;
2400 => val = 4;
4800 => val = 6;
9600 => val = 8;
19200 => val = 9;
38400 => val = 10;
57600 => val = 11;
115200 => val = 12;
}
buf[0] = byte val;
if (usb->setup(setupfd, UMCT_SET_REQUEST, REQ_SET_BAUD_RATE, 0, 0, buf, nil) < 0) {
if (debug)
sys->print("usbmct: set_baud_rate failed\n");
}
}
set_lcr(val: int)
{
buf := array [1] of byte;
buf[0] = byte val;
if (usb->setup(setupfd, UMCT_SET_REQUEST, REQ_SET_LCR, 0, 0, buf, nil) < 0) {
if (debug)
sys->print("usbmct: set_lcr failed\n");
}
}
init(usbmod: Usb, psetupfd, pctlfd: ref Sys->FD,
dev: ref Usb->Device,
conf: array of ref Usb->Configuration, path: string): int
{
statusep, inep, outep: ref Usb->Endpt;
usb = usbmod;
sys = load Sys Sys->PATH;
setupfd = psetupfd;
# check the device descriptor to see if it really is an MCT doofer
if (dev.vid != 16r0711 || dev.did != 16r0230) {
if (debug)
sys->print("usbmct: wrong device!\n");
return -1;
}
usb->set_configuration(setupfd, conf[0].id);
ai := hd conf[0].iface[0].altiface;
statusep = nil;
inep = nil;
outep = nil;
for (e := 0; e < len ai.ep; e++) {
ep := ai.ep[e];
if ((ep.addr & 16r80) != 0 && (ep.attr & 3) == 3 && ep.maxpkt == 2)
statusep = ep;
else if ((ep.addr & 16r80) != 0 && (ep.attr & 3) == 3)
inep = ep;
else if ((ep.addr & 16r80) == 0 && (ep.attr & 3) == 2)
outep = ep;
}
if (statusep == nil || outep == nil || inep == nil) {
if (debug)
sys->print("usbmct: can't find sensible endpoints\n");
return -1;
}
if ((inep.addr & 15) != (outep.addr & 15)) {
if (debug)
sys->print("usbmct: in and out endpoints not same number\n");
return -1;
}
ioid := inep.addr & 15;
statusid := statusep.addr & 15;
if (debug)
sys->print("ep %d %d r %d 32\n", ioid, inep.maxpkt, inep.interval);
if (sys->fprint(pctlfd, "ep %d %d r %d 32", ioid, inep.maxpkt, inep.interval) < 0) {
if (debug)
sys->print("usbmct: can't create i/o endpoint (i)\n");
return -1;
}
# if (debug)
# sys->print("ep %d %d r bulk 32\n", ioid, inep.maxpkt);
# if (sys->fprint(pctlfd, "ep %d %d r bulk 32", ioid, inep.maxpkt) < 0) {
# if (debug)
# sys->print("usbmct: can't create i/o endpoint (i)\n");
# return -1;
# }
if (debug)
sys->print("ep %d %d w bulk 8\n", ioid, outep.maxpkt);
if (sys->fprint(pctlfd, "ep %d %d w bulk 8", ioid, outep.maxpkt) < 0) {
if (debug)
sys->print("usbmct: can't create i/o endpoint (o)\n");
return -1;
}
iofd := sys->open(path + "ep" + string ioid + "data", Sys->ORDWR);
if (iofd == nil) {
if (debug)
sys->print("usbmct: can't open i/o endpoint\n");
return -1;
}
if (debug)
sys->print("ep %d %d r %d 8\n", statusid, statusep.maxpkt, statusep.interval);
if (sys->fprint(pctlfd, "ep %d %d r %d 8", statusid, statusep.maxpkt, statusep.interval) < 0) {
if (debug)
sys->print("usbmct: can't create status endpoint\n");
return -1;
}
statusfd := sys->open(path + "ep" + string statusid + "data", Sys->ORDWR);
if (statusfd == nil) {
if (debug)
sys->print("usbmct: can't open status endpoint\n");
return -1;
}
sys->print("setting baud rate\n");
set_baud_rate(9600);
sys->print("setting lcr\n");
set_lcr(LCR_PARITY_NONE | LCR_DATA_BITS_8 | LCR_STOP_BITS_1);
sys->print("launching reader\n");
pidc := chan of int;
spawn ioreader(pidc, iofd);
ioreaderpid = <- pidc;
spawn statusreader(pidc, statusfd);
statusreaderpid = <- pidc;
buf := array[512] of byte;
for (x := 0; x < 512; x += 16) {
buf[x:] = array of byte sys->sprint("%.2ux", x / 16);
buf[x + 2:] = array of byte "-0123456789-\r\n";
}
sys->write(iofd, buf, 512);
return 0;
}
shutdown()
{
if (ioreaderpid >= 0)
kill(ioreaderpid);
if (statusreaderpid >= 0)
kill(statusreaderpid);
}