File: [local] / sys / arch / vax / vax / ctu.c (download)
Revision 1.1.1.1 (vendor branch), Tue Mar 4 16:08:46 2008 UTC (16 years, 3 months ago) by nbrk
Branch: OPENBSD_4_2_BASE, MAIN
CVS Tags: jornada-partial-support-wip, HEAD Changes since 1.1: +0 -0 lines
Import of OpenBSD 4.2 release kernel tree with initial code to support
Jornada 720/728, StrongARM 1110-based handheld PC.
At this point kernel roots on NFS and boots into vfs_mountroot() and traps.
What is supported:
- glass console, Jornada framebuffer (jfb) works in 16bpp direct color mode
(needs some palette tweaks for non black/white/blue colors, i think)
- saic, SA11x0 interrupt controller (needs cleanup)
- sacom, SA11x0 UART (supported only as boot console for now)
- SA11x0 GPIO controller fully supported (but can't handle multiple interrupt
handlers on one gpio pin)
- sassp, SSP port on SA11x0 that attaches spibus
- Jornada microcontroller (jmcu) to control kbd, battery, etc throught
the SPI bus (wskbd attaches on jmcu, but not tested)
- tod functions seem work
- initial code for SA-1111 (chip companion) : this is TODO
Next important steps, i think:
- gpio and intc on sa1111
- pcmcia support for sa11x0 (and sa1111 help logic)
- REAL root on nfs when we have PCMCIA support (we may use any of supported pccard NICs)
- root on wd0! (using already supported PCMCIA-ATA)
|
/* $OpenBSD: ctu.c,v 1.10 2007/06/06 17:15:13 deraadt Exp $ */
/* $NetBSD: ctu.c,v 1.10 2000/03/23 06:46:44 thorpej Exp $ */
/*
* Copyright (c) 1996 Ludd, University of Lule}, Sweden.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed at Ludd, University of
* Lule}, Sweden and its contributors.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Device driver for 11/750 Console TU58.
*
* Error checking is almost nonexistent, the driver should be
* fixed to at least calculate checksum on incoming packets.
* Writing of tapes does not work, by some unknown reason so far.
* It is almost useless to try to use this driver when running
* multiuser, because the serial device don't have any buffers
* so we will lose interrupts.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/callout.h>
#include <sys/kernel.h>
#include <sys/buf.h>
#include <sys/fcntl.h>
#include <sys/malloc.h>
#include <sys/ioctl.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <sys/disklabel.h> /* For disklabel prototype */
#include <machine/mtpr.h>
#include <machine/rsp.h>
#include <machine/scb.h>
#include <machine/trap.h>
enum tu_state {
SC_UNUSED,
SC_INIT,
SC_READY,
SC_SEND_CMD,
SC_GET_RESP,
SC_GET_WCONT,
SC_GET_END,
SC_RESTART,
};
struct tu_softc {
enum tu_state sc_state;
int sc_error;
char sc_rsp[15]; /* Should be struct rsb; but don't work */
u_char *sc_xfptr; /* Current char to xfer */
u_char *sc_blk; /* Base of current 128b block */
int sc_tpblk; /* Start block number */
int sc_nbytes; /* Number of bytes to xfer */
int sc_xbytes; /* Number of xfer'd bytes */
int sc_bbytes; /* Number of xfer'd bytes this block */
int sc_op; /* Read/write */
int sc_xmtok; /* set if OK to xmit */
struct buf_queue sc_q; /* pending I/O requests */
} tu_sc;
struct ivec_dsp tu_recv, tu_xmit;
void ctutintr(void *);
void cturintr(void *);
void ctuattach(void);
void ctustart(struct buf *);
void ctuwatch(void *);
short ctu_cksum(unsigned short *, int);
int ctuopen(dev_t, int, int, struct proc *);
int ctuclose(dev_t, int, int, struct proc *);
void ctustrategy(struct buf *);
int ctuioctl(dev_t, u_long, caddr_t, int, struct proc *);
int ctudump(dev_t, daddr64_t, caddr_t, size_t);
static struct callout ctu_watch_ch = CALLOUT_INITIALIZER;
void
ctuattach()
{
BUFQ_INIT(&tu_sc.sc_q);
tu_recv = idsptch;
tu_recv.hoppaddr = cturintr;
scb->scb_csrint = (void *)&tu_recv;
tu_xmit = idsptch;
tu_xmit.hoppaddr = ctutintr;
scb->scb_cstint = (void *)&tu_xmit;
}
int
ctuopen(dev, oflags, devtype, p)
dev_t dev;
int oflags, devtype;
struct proc *p;
{
int unit, error;
unit = minor(dev);
if (unit)
return ENXIO;
if (tu_sc.sc_state != SC_UNUSED)
return EBUSY;
tu_sc.sc_error = 0;
mtpr(0100, PR_CSRS); /* Enable receive interrupt */
callout_reset(&ctu_watch_ch, hz, ctuwatch, NULL);
tu_sc.sc_state = SC_INIT;
mtpr(RSP_TYP_INIT, PR_CSTD);
if ((error = tsleep((caddr_t)&tu_sc, (PZERO + 10)|PCATCH,
"ctuopen", 0)))
return (error);
if (tu_sc.sc_error)
return tu_sc.sc_error;
tu_sc.sc_state = SC_READY;
tu_sc.sc_xmtok = 1;
mtpr(0100, PR_CSTS);
return 0;
}
int
ctuclose(dev, oflags, devtype, p)
dev_t dev;
int oflags, devtype;
struct proc *p;
{
mtpr(0, PR_CSRS);
mtpr(0, PR_CSTS);
tu_sc.sc_state = SC_UNUSED;
callout_stop(&ctu_watch_ch);
return 0;
}
void
ctustrategy(bp)
struct buf *bp;
{
int s;
#ifdef TUDEBUG
printf("addr %x, block %x, nblock %x, read %x\n",
bp->b_data, bp->b_blkno, bp->b_bcount,
bp->b_flags & B_READ);
#endif
if (bp->b_blkno >= 512) {
s = splbio();
biodone(bp);
splx(s);
return;
}
bp->b_rawblkno = bp->b_blkno;
s = splbio();
disksort_blkno(&tu_sc.sc_q, bp); /* Why not use disksort? */
if (tu_sc.sc_state == SC_READY)
ctustart(bp);
splx(s);
}
void
ctustart(bp)
struct buf *bp;
{
struct rsp *rsp = (struct rsp *)tu_sc.sc_rsp;
tu_sc.sc_xfptr = tu_sc.sc_blk = bp->b_data;
tu_sc.sc_tpblk = bp->b_blkno;
tu_sc.sc_nbytes = bp->b_bcount;
tu_sc.sc_xbytes = tu_sc.sc_bbytes = 0;
tu_sc.sc_op = bp->b_flags & B_READ ? RSP_OP_READ : RSP_OP_WRITE;
rsp->rsp_typ = RSP_TYP_COMMAND;
rsp->rsp_sz = 012;
rsp->rsp_op = tu_sc.sc_op;
rsp->rsp_mod = 0;
rsp->rsp_drv = 0;
rsp->rsp_sw = rsp->rsp_xx1 = rsp->rsp_xx2 = 0;
rsp->rsp_cnt = tu_sc.sc_nbytes;
rsp->rsp_blk = tu_sc.sc_tpblk;
rsp->rsp_sum = ctu_cksum((unsigned short *)rsp, 6);
tu_sc.sc_state = SC_SEND_CMD;
if (tu_sc.sc_xmtok) {
tu_sc.sc_xmtok = 0;
ctutintr(NULL);
}
}
int
ctuioctl(dev, cmd, data, fflag, p)
dev_t dev;
u_long cmd;
caddr_t data;
int fflag;
struct proc *p;
{
return 0;
}
/*
* Not bloody likely...
*/
int
ctudump(dev, blkno, va, size)
dev_t dev;
daddr64_t blkno;
caddr_t va;
size_t size;
{
return 0;
}
void
cturintr(arg)
void *arg;
{
int status = mfpr(PR_CSRD);
struct buf *bp;
bp = BUFQ_FIRST(&tu_sc.sc_q);
switch (tu_sc.sc_state) {
case SC_UNUSED:
printf("stray console storage interrupt, got %o\n", status);
break;
case SC_INIT:
if (status != RSP_TYP_CONTINUE)
tu_sc.sc_error = EIO;
wakeup((void *)&tu_sc);
break;
case SC_GET_RESP:
tu_sc.sc_tpblk++;
if (tu_sc.sc_xbytes == tu_sc.sc_nbytes) {
tu_sc.sc_bbytes++;
if (tu_sc.sc_bbytes == 146) { /* We're finished! */
#ifdef TUDEBUG
printf("Xfer ok\n");
#endif
BUFQ_REMOVE(&tu_sc.sc_q, bp);
biodone(bp);
tu_sc.sc_xmtok = 1;
tu_sc.sc_state = SC_READY;
if (BUFQ_FIRST(&tu_sc.sc_q) != NULL)
ctustart(BUFQ_FIRST(&tu_sc.sc_q));
}
break;
}
tu_sc.sc_bbytes++;
if (tu_sc.sc_bbytes < 3) /* Data header */
break;
if (tu_sc.sc_bbytes == 132) { /* Finished */
tu_sc.sc_bbytes = 0;
break;
}
if (tu_sc.sc_bbytes == 131) /* First checksum */
break;
tu_sc.sc_xfptr[tu_sc.sc_xbytes++] = status;
break;
case SC_GET_WCONT:
if (status != 020)
printf("SC_GET_WCONT: status %o\n", status);
else
ctutintr(NULL);
tu_sc.sc_xmtok = 0;
break;
case SC_RESTART:
ctustart(BUFQ_FIRST(&tu_sc.sc_q));
break;
default:
if (status == 4) { /* Protocol error, or something */
tu_sc.sc_state = SC_RESTART;
mtpr(RSP_TYP_INIT, PR_CSTD);
return;
}
printf("Unknown receive ctuintr state %d, pack %o\n",
tu_sc.sc_state, status);
}
}
void
ctutintr(arg)
void *arg;
{
int c;
if (tu_sc.sc_xmtok)
return;
switch (tu_sc.sc_state) {
case SC_SEND_CMD:
c = tu_sc.sc_rsp[tu_sc.sc_xbytes++] & 0xff;
mtpr(c, PR_CSTD);
if (tu_sc.sc_xbytes > 13) {
tu_sc.sc_state = (tu_sc.sc_op == RSP_OP_READ ?
SC_GET_RESP : SC_GET_WCONT);
tu_sc.sc_xbytes = 0;
tu_sc.sc_xmtok++;
}
break;
case SC_GET_WCONT:
switch (tu_sc.sc_bbytes) {
case 0:
mtpr(1, PR_CSTD); /* This is a data packet */
break;
case 1:
mtpr(128, PR_CSTD); /* # of bytes to send */
break;
case 130:
mtpr(0, PR_CSTD); /* First checksum */
break;
case 131:
mtpr(0, PR_CSTD); /* Second checksum */
break;
case 132: /* Nothing to send... */
tu_sc.sc_bbytes = -1;
if (tu_sc.sc_xbytes == tu_sc.sc_nbytes + 1)
tu_sc.sc_op = SC_GET_END;
break;
default:
c = tu_sc.sc_rsp[tu_sc.sc_xbytes++] & 0xff;
mtpr(c, PR_CSTD);
break;
}
tu_sc.sc_bbytes++;
break;
default:
printf("Unknown xmit ctuintr state %d\n",tu_sc.sc_state);
}
}
short
ctu_cksum(buf, words)
unsigned short *buf;
int words;
{
int i, cksum;
for (i = cksum = 0; i < words; i++)
cksum += buf[i];
hej: if (cksum > 65535) {
cksum = (cksum & 65535) + (cksum >> 16);
goto hej;
}
return cksum;
}
int oldtp;
/*
* Watch so that we don't get blocked unnecessary due to lost int's.
*/
void
ctuwatch(arg)
void *arg;
{
callout_reset(&ctu_watch_ch, hz, ctuwatch, NULL);
if (tu_sc.sc_state == SC_GET_RESP && tu_sc.sc_tpblk != 0 &&
tu_sc.sc_tpblk == oldtp && (tu_sc.sc_tpblk % 128 != 0)) {
printf("tu0: lost recv interrupt\n");
ctustart(BUFQ_FIRST(&tu_sc.sc_q));
return;
}
if (tu_sc.sc_state == SC_RESTART)
mtpr(RSP_TYP_INIT, PR_CSTS);
oldtp = tu_sc.sc_tpblk;
}