/*  * This file is part of the UCB release of Plan 9. It is subject to the license * terms in the LICENSE file found in the top-level directory of this * distribution and at http://akaros.cs.berkeley.edu/files/Plan9License. No * part of the UCB release of Plan 9, including this file, may be copied, * modified, propagated, or distributed except according to the terms contained * in the LICENSE file. */ //// channel element driver//#include "u.h"#include "../port/lib.h"#include "mem.h"#include "dat.h"#include "fns.h"#include "io.h"#include "../port/error.h"#include "msaturn.h" enum{	Ucuunknown = 0,	Ucu64, 	Ndsp = 16, 	Cedead = 0,	Cereset,	Celoaded,	Cerunning,		Qdir = 0,	Qctl,	Qce, 	Cpldbase = Saturn + 0x6000000,		Cplducuversion_ucu = 0x1c,	Cebase = Saturn + 0x3000000,	Cesize = 0x100000,}; typedef struct Cpld Cpld;struct Cpld{	uchar	led;	uchar	fpga1;	uchar	slotid;	uchar	version;	uchar	watchdog;	uchar	spi;	uchar	asicreset;	uchar	dspreset;	uchar	generalreset;	uchar	ucuversion;	uchar	fpga2;}; typedef struct Circbuf Circbuf;struct Circbuf{	uchar	*nextin;	uchar	*nextout;	uchar	*start;	uchar	*end;}; typedef struct Dsp Dsp;struct Dsp{	Ref;	int		state;	Circbuf	*cb;}; typedef struct Ce Ce;struct Ce{	int		ucutype;	Ce		*ces[Ndsp];}; static Cpld*cpld = (Cpld*)Cpldbase;static Ce ce; static voidceinit(void){	if(cpld->ucuversion & Cplducuversion_ucu)		ce.ucutype = Ucu64;	else{		print("ceinit: unsuppoerted UCU\n");		return;	} } static Chan*ceattach(char*spec){	return devattach('C', spec);} #define DEV(q)			((int)(((q).path >> 8) & 0xff))#define TYPE(q)			((int)((q).path & 0xff))#define QID(d, t)		((((d) & 0xff) << 8) | (t)) static intcegen(Chan*c, char*, Dirtab*, int, int i, Dir*dp){	Qid qid; 	switch(TYPE(c->qid)){	case Qdir:		if(i == DEVDOTDOT){			mkqid(&qid, QID(0, Qdir), 0, QTDIR);			devdir(c, qid, "#C", 0, eve, 0555, dp);			return 1;		} 		if(i == 0){			mkqid(&qid, QID(-1, Qctl), 0, QTFILE);			devdir(c, qid, "cectl", 0, eve, 0644, dp);			return 1;		} 		if (--i >= Ndsp)			return -1;			mkqid(&qid, QID(Qce, i), 0, QTFILE);		snprint(up->genbuf, sizeof(up->genbuf), "ce%d", i);		devdir(c, qid, up->genbuf, 0, eve, 0644, dp);		return 1; 	default:		return -1;	}} static Walkqid *cewalk(Chan*c, Chan*nc, char**name, int nname){	return devwalk(c, nc, name, nname, 0, 0, cegen);} static intcestat(Chan*c, uchar*db, int n){	return devstat(c, db, n, 0, 0, cegen);} static Chan*ceopen(Chan*c, int omode){	c->mode = openmode(omode);	c->flag |= COPEN;	c->offset = 0;	return c;} static voidceclose(Chan*){} static longceread(Chan*c, void*a, long n, vlong){	switch(TYPE(c->qid)){	case Qdir:		return devdirread(c, a, n, 0, 0, cegen);		default:		error("unsupported operation");	}	return 0;} static longcewrite(Chan*, void*, long, vlong){	return 0;} Dev cedevtab = {	'C',	"channel element", 	devreset,	ceinit,	devshutdown,	ceattach,	cewalk,	cestat,	ceopen,	devcreate,	ceclose,	ceread,	devbread,	cewrite,	devbwrite,	devremove,	devwstat,	devpower,};