/* $NetBSD: a12dc.c,v 1.3 2000/11/02 00:26:35 eeh Exp $ */ /* [Notice revision 2.2] * Copyright (c) 1997, 1998 Avalon Computer Systems, Inc. * All rights reserved. * * Author: Ross Harvey * * 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 and * author 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. Neither the name of Avalon Computer Systems, Inc. nor the names of * its contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * 4. This copyright will be assigned to The NetBSD Foundation on * 1/1/2000 unless these terms (including possibly the assignment * date) are updated in writing by Avalon prior to the latest specified * assignment date. * * THIS SOFTWARE IS PROVIDED BY AVALON COMPUTER SYSTEMS, INC. AND CONTRIBUTORS * ``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 AVALON OR THE CONTRIBUTORS * 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. */ /* * The A12 uses what DEC calls a "detached console", i.e., some of the console * implementation is on a dedicated processor with its own RAM. * * The A12 Detached Console interface uses two 16 bit registers (per CPU), one * going from the CPU to the a12ctrl processor and one going back the other * way. The first is polled, the second produces a GInt. * * In the very early days we loaded program images through this interface. * * Consequently, it developed an overly complicated (but sort of fast) * inverting sync/ack that isn't needed at all for its present application as * a text console device. * * One possible solution: most of the channels are undefined, so a console * channel using a stateless ack could be defined, with corresponding changes * to the backplane 68360 code. * * This file is complicated somewhat by its use in three different kernels: * NetBSD, the A12 CPU-resident console, and the a12ctrl backplane processor. * (The protocol is symmetrical.) */ #include "opt_avalon_a12.h" /* Config options headers */ #ifndef BSIDE #include /* RCS ID & Copyright macro defns */ __KERNEL_RCSID(0, "$NetBSD: a12dc.c,v 1.3 2000/11/02 00:26:35 eeh Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "a12dcreg.h" #define A12DC() /* Generate ctags(1) key */ #define MAX_MODULES 1 int a12dcmatch __P((struct device *, struct cfdata *, void *)); void a12dcattach __P((struct device *, struct device *, void *)); struct a12dc_softc { struct device sc_dev; } a12dc_softc; struct cfattach a12dc_ca = { sizeof(struct a12dc_softc), a12dcmatch, a12dcattach, }; extern struct cfdriver a12dc_cd; int a12dcfound; /* There Can Be Only One. */ struct a12dc_config { int im_not_used; } a12dc_configuration; static struct tty *a12dc_tty[1]; void a12dcstart __P((struct tty *)); void a12dctimeout __P((void *)); int a12dcparam __P((struct tty *, struct termios *)); void a12dc_init(struct a12dc_config *, int); static void a12cdrputc __P((int)); int a12dccngetc(dev_t); void a12dccnputc(dev_t, int); void a12dccnpollc(dev_t, int); /* static int get_bc_char(int mn, int chan); */ /* static int get_bc_any(int,int *,int *); */ int a12dcintr __P((void *)); static void a12_worry(int worry_number); static void A12InitBackDriver(int); int a12dcmatch(parent, match, aux) struct device *parent; struct cfdata *match; void *aux; { struct pcibus_attach_args *pba = aux; return cputype == ST_AVALON_A12 && strcmp(pba->pba_busname, a12dc_cd.cd_name) == 0 && !a12dcfound; } void a12dcattach(parent, self, aux) struct device *parent, *self; void *aux; { struct tty *tp; struct a12dc_config *ccp; /* note that we've attached the chipset; can't have 2 A12Cs. */ a12dcfound = 1; printf(": driver %s\n", "$Revision: 1.3 $"); tp = a12dc_tty[0] = ttymalloc(); tp->t_oproc = a12dcstart; tp->t_param = a12dcparam; tty_attach(tp); ccp = &a12dc_configuration; a12dc_init(ccp, 1); } void a12dc_init(ccp, mallocsafe) struct a12dc_config *ccp; int mallocsafe; { } /* * XXX definitions specific to only one of the kernels will be moved into * kernel-local include files. (One of these days.) */ #define spla12dc() spltty() #define a12yield() #define CDRADDR(m) ((mmreg_t *)(REGADDR(A12_CDR))) /* ignore m */ #define modenormal() #define mb() alpha_mb() #define wmb() alpha_wmb() #else #include "product.def" #include "ghs.h" #include "a12ctrl.h" #define wmb() #define mb() #define swpipl(a) (a) #define splx(a) (a) #define spla12dc() #define hrhpanic(s,v) panic((s)) #define CDRADDR(m) ((mmreg_t *)(A12_BACKPLANE+(m))) #endif static int msgetput __P((register mstate_type *, int, int)); static void checkinit __P((void)); static void A12InitBackDriver(int m) { /* * XXX memset() would be good here, but there is a (temporary) reason * for all this right now */ a12_mstate[m].xcdr = CDRADDR(m); a12_mstate[m].txrdy_out = A12C_TXRDY; a12_mstate[m].txrdy_in = A12C_TXRDY; a12_mstate[m].txack_out = A12C_TXACK; a12_mstate[m].txack_in = A12C_TXACK; a12_mstate[m].txsv = tx_idle; a12_mstate[m].rxsv = rx_idle; a12_mstate[m].reset_scanner= 1; a12_mstate[m].reset_loader = 1; a12_mstate[m].up = 1; a12_mstate[m].lastr = 0; /* last char. received */ a12_mstate[m].lastrc = 0; /* last received channel */ a12_mstate[m].rx_busy_wait = 0; /* last received busy ticks */ a12_mstate[m].rx_busy_cnt = 0; /* last received start clock */ a12_mstate[m].lastt = 0; /* last char. trasmitted */ a12_mstate[m].lasttc = 0; /* last transmit channel */ a12_mstate[m].tx_busy_wait = 0; /* last transmitted busy ticks */ a12_mstate[m].tx_busy_cnt = 0; /* last transmitted start clock */ a12_mstate[m].tbytes = 0; a12_mstate[m].tblkbytes = 0; a12_mstate[m].tblks = 0; a12_mstate[m].blwobe = 0; a12_mstate[m].blwbe = 0; a12_mstate[m].max_blkretry = 0; a12_mstate[m].max_blktime = 0; a12_mstate[m].max_blktimesz = 0; a12_mstate[m].avg_blksz = 0; a12_mstate[m].avg_blktime = 0; a12_mstate[m].retry_time = 0; } static void checkinit() { static int did_init; if (!did_init) { A12InitBackDriver(0); did_init = 1; } } int a12dcopen(dev, flag, mode, p) dev_t dev; int flag, mode; struct proc *p; { int unit = minor(dev); struct tty *tp; int s; if (unit >= 1) return ENXIO; #ifdef KGDB if (flags & COM_HW_KGDB) return EBUSY; #endif if (!a12dc_tty[unit]) { tp = a12dc_tty[unit] = ttymalloc(); tty_attach(tp); } else tp = a12dc_tty[unit]; if ((tp->t_state & TS_ISOPEN) && (tp->t_state & TS_XCLUDE) && p->p_ucred->cr_uid != 0) return EBUSY; s = spltty(); tp->t_oproc = a12dcstart; tp->t_param = a12dcparam; tp->t_dev = dev; if ((tp->t_state & TS_ISOPEN) == 0) { tp->t_state |= TS_CARR_ON; ttychars(tp); tp->t_iflag = TTYDEF_IFLAG; tp->t_oflag = TTYDEF_OFLAG; tp->t_cflag = TTYDEF_CFLAG|CLOCAL; tp->t_lflag = TTYDEF_LFLAG; tp->t_ispeed = tp->t_ospeed = 9600; ttsetwater(tp); /* XXX XXX XXX a12_intr_register_icw(a12dcintr); */ } else if (tp->t_state&TS_XCLUDE && p->p_ucred->cr_uid != 0) { splx(s); return EBUSY; } splx(s); return (*tp->t_linesw->l_open)(dev, tp); } int a12dcclose(dev, flag, mode, p) dev_t dev; int flag, mode; struct proc *p; { int unit = minor(dev); struct tty *tp = a12dc_tty[unit]; (*tp->t_linesw->l_close)(tp, flag); ttyclose(tp); return 0; } int a12dcread(dev, uio, flag) dev_t dev; struct uio *uio; int flag; { struct tty *tp = a12dc_tty[minor(dev)]; return ((*tp->t_linesw->l_read)(tp, uio, flag)); } int a12dcwrite(dev, uio, flag) dev_t dev; struct uio *uio; int flag; { struct tty *tp = a12dc_tty[minor(dev)]; return ((*tp->t_linesw->l_write)(tp, uio, flag)); } int a12dcioctl(dev, cmd, data, flag, p) dev_t dev; u_long cmd; caddr_t data; int flag; struct proc *p; { int unit = minor(dev); struct tty *tp = a12dc_tty[unit]; int error; error = (*tp->t_linesw->l_ioctl)(tp, cmd, data, flag, p); if (error >= 0) return error; error = ttioctl(tp, cmd, data, flag, p); if (error >= 0) return error; return ENOTTY; } int a12dcparam(tp, t) struct tty *tp; struct termios *t; { return 0; } void a12dcstart(tp) struct tty *tp; { int s; s = spltty(); if (tp->t_state & (TS_TTSTOP | TS_BUSY)) goto out; if (tp->t_outq.c_cc <= tp->t_lowat) { if (tp->t_state & TS_ASLEEP) { tp->t_state &= ~TS_ASLEEP; wakeup((caddr_t)&tp->t_outq); } selwakeup(&tp->t_wsel); } tp->t_state |= TS_BUSY; while (tp->t_outq.c_cc != 0) a12dccnputc(tp->t_dev, getc(&tp->t_outq)); tp->t_state &= ~TS_BUSY; out: splx(s); } /* * Stop output on a line. */ void a12dcstop(tp, flag) struct tty *tp; { int s; s = spltty(); if (tp->t_state & TS_BUSY) if ((tp->t_state & TS_TTSTOP) == 0) tp->t_state |= TS_FLUSH; splx(s); } int a12dcintr(v) void *v; { #if 1 DIE(); #else struct tty *tp = v; u_char c; while (a12dccnlookc(tp->t_dev, &c)) { if (tp->t_state & TS_ISOPEN) (*tp->t_linesw->l_rint)(c, tp); } #endif } struct tty * a12dctty(dev) dev_t dev; { if (minor(dev) != 0) panic("a12dctty: bogus"); return a12dc_tty[0]; } int a12dccnattach() { int i; static struct consdev a12dccons = { NULL, NULL, a12dccngetc, a12dccnputc, a12dccnpollc, NULL, NODEV, CN_NORMAL }; for(i = 0; i < nchrdev; ++i) if (cdevsw[i].d_open == a12dcopen) a12dccons.cn_dev = makedev(i, 0); cn_tab = &a12dccons; return 0; } int a12dccngetc(dev) dev_t dev; { for(;;) continue; } void a12dccnputc(dev, c) dev_t dev; int c; { a12cdrputc(c); } void a12dccnpollc(dev, on) dev_t dev; int on; { } static void a12cdrputc(int c) { int s = spla12dc(); checkinit(); while(msgetput(MSP(0),CHANNEL_MONITOR,c)) { /*if(check_cdr_ok) check_cdr();*/ DELAY(100); } splx(s); } #if 0 static void check_cdr() { int bpchar,cnumber; static int srom_word_address, kmsg; int push_check_ok; int ipl; if(!get_bc_any(0,&bpchar,&cnumber)) return; switch(cnumber) { default: printf("Unknown cdr channel %d",cnumber); break; case CHANNEL_KDATA: if(!kmsg) printf("Ignoring new kernel\n");; kmsg = 1; break; case CHANNEL_KMARK: kmsg = 0; break; #ifndef _KERNEL /* NetBSD kernel, that is. "if defined: rtmon kernel" */ case CHANNEL_SROM_A: srom_word_address = bpchar; break; case CHANNEL_SROM_D: push_check_ok = check_cdr_ok; check_cdr_ok = 0; ipl = swpipl(7); write_ethernet_srom(srom_word_address,bpchar); ++srom_word_address; (void)swpipl(ipl); check_cdr_ok = push_check_ok; break; case CHANNEL_MULTI: logmchar(bpchar,"<"); SerialByteReceived(bpchar); break; case CHANNEL_MONITOR: if (bpchar == CPX_PANIC) /* TJF - Could kill all processes and then panic? */ hrhpanic("Panic in cooperating CPU.",0); else cpxchar(bpchar); break; #endif case CHANNEL_CONSOLE: #ifdef A12CON /* XXX this can be done much better */ virtual_keyboard_byte(bpchar); #else ipl7putc(bpchar); #endif break; } } #endif #if 0 static int get_bc_any(int mn, int *c, int *chan) { mstate_type *ms = &a12_mstate[mn]; (void)mcgetput(mn, 0, -1); if(ms->rxsv==rx_busy) { *c = ms->c2b_char & 0xff; *chan = ms->c2b_channel; ms->rxsv = rx_idle; return 1; } return 0; } static int get_bc_char(int mn, int chan) { int newc,newchan; if(get_bc_any(mn,&newc,&newchan)) { if(newchan!=chan) printf("receiver busy on dumb channel %d", newchan); return newc; } return -1; } #endif static int msgetput(register mstate_type *ms, int channel, int c) { int i,t; int ipl; if(c==-2 || ms->up==0) { if(c!=-2) a12_worry(10); ms->txsv = tx_idle; ms->rxsv = rx_idle; ms->cdr = 0; return 0; } if(!(0<=channel && channel<64)) { a12_worry(7); return 0; } ipl = spla12dc(); for(i=0; i<20; ++i) { switch(ms->txsv) { case tx_idle: if(c!=-1) { ms->lastt = c; ms->lasttc = channel; ms->cdr = (ms->cdr & (A12C_TXACK | A12C_TXRDY)) | channel<<8 | c; *ms->xcdr = ms->cdr; wmb(); ms->cdr = ((ms->cdr & A12C_TXACK) &~ A12C_TXRDY) | ms->txrdy_out | channel<<8 | c; *ms->xcdr = ms->cdr; wmb(); ms->txsv = tx_braaw; c = -1; continue; } break; case tx_braaw: mb(); if((*ms->xcdr & A12C_TXACK)==ms->txack_in) { ms->txrdy_out ^= A12C_TXRDY; ms->txack_in ^= A12C_TXACK; ms->txsv = tx_idle; ms->tbytes++; continue; } break; default: (void)splx(ipl); a12_worry(5); return 0; } switch(ms->rxsv) { case rx_idle: mb(); t = *ms->xcdr; if((t & A12C_TXRDY)==ms->txrdy_in) { ms->cdr = (ms->cdr & ~A12C_TXACK) | ms->txack_out; *ms->xcdr = ms->cdr; wmb(); ms->c2b_char = t & 0xff; ms->lastr = ms->c2b_char; ms->c2b_channel = (t & CHMASK) >> 8; ms->lastrc = ms->c2b_channel; ms->txrdy_in ^= A12C_TXRDY; ms->txack_out^= A12C_TXACK; ms->rxsv = rx_busy; continue; } break; case rx_busy: break; default: (void)splx(ipl); a12_worry(6); return 0; } if(c==-1) break; } (void)splx(ipl); return c!=-1; } static void a12_worry(int worry_number) { a12console_last_unexpected_error = worry_number; }