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#include <u.h>
#include <libc.h>
#include <thread.h>
#include <fcall.h>
#include <9p.h>
#include "usb.h"
#include "serial.h"
enum {
Enable = 0x00,
Getbaud = 0x1D,
Setbaud = 0x1E,
Setlcr = 0x03,
Getlcr = 0x04,
Bitsmask = 0x0F00,
Bitsshift = 8,
Parmask = 0x00F0,
Parshift = 4,
Stopmask = 0x000F,
Stop1 = 0x0000,
Stop1_5 = 0x0001,
Stop2 = 0x0002,
};
static Cinfo slinfo[] = {
{ 0x10c4, 0xea60, }, /* CP210x */
{ 0x10c4, 0xea61, }, /* CP210x */
{ 0, 0, },
};
static Serialops slops;
slprobe(Serial *ser)
{
Usbdev *ud = ser->dev->usb;
if(matchid(slinfo, ud->vid, ud->did) == nil)
return -1;
ser->Serialops = slops;
return 0;
}
static int
slwrite(Serialport *p, int req, void *buf, int len)
{
Serial *ser;
ser = p->s;
return usbcmd(ser->dev, Rh2d | Rvendor | Riface, req, 0, p->interfc,
buf, len);
}
static int
slput(Serialport *p, uint op, uint val)
{
Serial *ser;
ser = p->s;
return usbcmd(ser->dev, Rh2d | Rvendor | Riface, op, val, p->interfc,
nil, 0);
}
static int
slread(Serialport *p, int req, void *buf, int len)
{
Serial *ser;
ser = p->s;
return usbcmd(ser->dev, Rd2h | Rvendor | Riface, req, 0, p->interfc,
buf, len);
}
static int
slinit(Serialport *p)
{
Serial *ser;
ser = p->s;
dsprint(2, "slinit\n");
slput(p, Enable, 1);
slops.getparam(p);
/* p gets freed by closedev, the process has a reference */
incref(ser->dev);
return 0;
}
static int
slgetparam(Serialport *p)
{
u16int lcr;
slread(p, Getbaud, &p->baud, sizeof(p->baud));
slread(p, Getlcr, &lcr, sizeof(lcr));
p->bits = (lcr&Bitsmask)>>Bitsshift;
p->parity = (lcr&Parmask)>>Parshift;
p->stop = (lcr&Stopmask) == Stop1? 1 : 2;
return 0;
}
static int
slsetparam(Serialport *p)
{
u16int lcr;
lcr = p->stop == 1? Stop1 : Stop2;
lcr |= (p->bits<<Bitsshift) | (p->parity<<Parshift);
slput(p, Setlcr, lcr);
slwrite(p, Setbaud, &p->baud, sizeof(p->baud));
return 0;
}
static int
wait4data(Serialport *p, uchar *data, int count)
{
int n;
qunlock(p->s);
while ((n = read(p->epin->dfd, data, count)) == 0)
;
qlock(p->s);
return n;
}
static Serialops slops = {
.init = slinit,
.getparam = slgetparam,
.setparam = slsetparam,
.wait4data = wait4data,
};
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