diff options
author | Thomas Bushnell <thomas@gnu.org> | 1997-02-25 21:28:37 +0000 |
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committer | Thomas Bushnell <thomas@gnu.org> | 1997-02-25 21:28:37 +0000 |
commit | f07a4c844da9f0ecae5bbee1ab94be56505f26f7 (patch) | |
tree | 12b07c7e578fc1a5f53dbfde2632408491ff2a70 /chips/dz_hdw.c |
Initial source
Diffstat (limited to 'chips/dz_hdw.c')
-rw-r--r-- | chips/dz_hdw.c | 649 |
1 files changed, 649 insertions, 0 deletions
diff --git a/chips/dz_hdw.c b/chips/dz_hdw.c new file mode 100644 index 0000000..fa47282 --- /dev/null +++ b/chips/dz_hdw.c @@ -0,0 +1,649 @@ +/* + * Mach Operating System + * Copyright (c) 1991,1990,1989 Carnegie Mellon University + * All Rights Reserved. + * + * Permission to use, copy, modify and distribute this software and its + * documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR + * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * Carnegie Mellon requests users of this software to return to + * + * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU + * School of Computer Science + * Carnegie Mellon University + * Pittsburgh PA 15213-3890 + * + * any improvements or extensions that they make and grant Carnegie Mellon + * the rights to redistribute these changes. + */ +/* + * File: dz_hdw.c + * Author: Alessandro Forin, Carnegie Mellon University + * Date: 9/90 + * + * Hardware-level operations for the DZ Serial Line Driver + */ + +#include <dz_.h> +#if NDZ_ > 0 +#include <bm.h> +#include <platforms.h> + +#include <mach_kdb.h> + +#include <machine/machspl.h> /* spl definitions */ +#include <device/io_req.h> +#include <device/tty.h> + +#include <chips/busses.h> +#include <chips/screen_defs.h> +#include <chips/serial_defs.h> + +#include <chips/dz_7085.h> + + +#ifdef DECSTATION +#include <mips/mips_cpu.h> +#include <mips/PMAX/kn01.h> +#define DZ_REGS_DEFAULT (vm_offset_t)PHYS_TO_K1SEG(KN01_SYS_DZ) +#define PAD(n) char n[6]; +#endif /*DECSTATION*/ + +#ifdef VAXSTATION +#define DZ_REGS_DEFAULT 0 +#define wbflush() +#define check_memory(addr,dow) ((dow) ? wbadaddr(addr,4) : badaddr(addr,4)) +#define PAD(n) char n[2]; +#endif /*VAXSTATION*/ + +#ifndef PAD +#define PAD(n) +#endif + +typedef struct { + volatile unsigned short dz_csr; /* Control and Status */ + PAD(pad0) + volatile unsigned short dz_rbuf; /* Rcv buffer (RONLY) */ + PAD(pad1) + volatile unsigned short dz_tcr; /* Xmt control (R/W)*/ + PAD(pad2) + volatile unsigned short dz_tbuf; /* Xmt buffer (WONLY)*/ +# define dz_lpr dz_rbuf /* Line parameters (WONLY)*/ +# define dz_msr dz_tbuf /* Modem status (RONLY)*/ + PAD(pad3) +} dz_padded_regmap_t; + + +/* this is ok both for rcv (char) and xmt (csr) */ +#define LINEOF(x) (((x) >> 8) & 0x3) + +/* + * Driver status + */ +struct dz7085_softc { + dz_padded_regmap_t *regs; + unsigned short breaks; + unsigned short fake; /* missing rs232 bits */ + int polling_mode; + unsigned short prev_msr; + char softCAR; +} dz7085_softc_data[NDZ_]; + +typedef struct dz7085_softc *dz7085_softc_t; + +dz7085_softc_t dz7085_softc[NDZ_]; + +static void check_car(); +static void check_ring(); + +dz7085_softCAR(unit, line, on) +{ + if (on) + dz7085_softc[unit]->softCAR |= 1<<line; + else + dz7085_softc[unit]->softCAR &= ~(1 << line); +} + +static +short dz7085_speeds[] = + { 0, DZ_LPAR_50, DZ_LPAR_75, DZ_LPAR_110, DZ_LPAR_134_5, DZ_LPAR_150, + 0, DZ_LPAR_300, DZ_LPAR_600, DZ_LPAR_1200, DZ_LPAR_1800, DZ_LPAR_2400, + DZ_LPAR_4800, DZ_LPAR_9600, DZ_LPAR_MAX_SPEED, 0 }; + + +/* + * Definition of the driver for the auto-configuration program. + */ + +int dz7085_probe(), dz7085_intr(); +static void dz7085_attach(); + +vm_offset_t dz7085_std[NDZ_] = { DZ_REGS_DEFAULT, }; +struct bus_device *dz7085_info[NDZ_]; +struct bus_driver dz_driver = + { dz7085_probe, 0, dz7085_attach, 0, dz7085_std, "dz", dz7085_info,}; + +/* + * Adapt/Probe/Attach functions + */ + +static boolean_t dz7085_full_modem = FALSE; +boolean_t dz7085_uses_modem_control = FALSE;/* patch this with adb */ + +set_dz_address( unit, regs, has_modem) + vm_offset_t regs; + boolean_t has_modem; +{ + extern int dz7085_probe(), dz7085_param(), dz7085_start(), + dz7085_putc(), dz7085_getc(), + dz7085_pollc(), dz7085_mctl(), dz7085_softCAR(); + + dz7085_std[unit] = regs; + dz7085_full_modem = has_modem & dz7085_uses_modem_control; + + /* Do this here */ + console_probe = dz7085_probe; + console_param = dz7085_param; + console_start = dz7085_start; + console_putc = dz7085_putc; + console_getc = dz7085_getc; + console_pollc = dz7085_pollc; + console_mctl = dz7085_mctl; + console_softCAR = dz7085_softCAR; + +} + +dz7085_probe( xxx, ui) + struct bus_device *ui; +{ + int unit = ui->unit; + dz7085_softc_t sc; + register int cntr; + register dz_padded_regmap_t *regs; + + static int probed_once = 0; + + regs = (dz_padded_regmap_t *)dz7085_std[unit]; /* like the old days! */ + if (regs == 0) + return 0; + /* + * If this is not there we are toast + */ + if (check_memory(regs, 0)) + return 0; + + if (probed_once++) + return 1; + + sc = &dz7085_softc_data[unit]; + dz7085_softc[unit] = sc; + sc->regs = regs; + + for (cntr = unit*NDZ_LINE; cntr < NDZ_LINE*(unit+1); cntr++) { + console_tty[cntr]->t_addr = (char*)regs; + console_tty[cntr]->t_state |= TS_MIN; + } + + /* pmaxen et al. lack many modem bits */ + dz7085_set_modem_control(sc, dz7085_full_modem); + + regs->dz_tcr = 0;/* disable all lines, drop RTS,DTR */ + return 1; +} + +boolean_t dz7085_timer_started = FALSE; + +static void +dz7085_attach(ui) + register struct bus_device *ui; +{ + int unit = ui->unit; + extern dz7085_scan(); + extern int tty_inq_size; + int i; + + /* We only have 4 ttys, but always at 9600 + * Give em a lot of room + */ + tty_inq_size = 2048; + for (i = 0; i < (NDZ_*NDZ_LINE); i++) + ttychars(console_tty[i]); + + if (!dz7085_timer_started) { + dz7085_timer_started = TRUE; + dz7085_scan(); + } + +#if NBM > 0 + if (SCREEN_ISA_CONSOLE()) { + printf("\n sl0: "); lk201_attach(0, unit); + printf("\n sl1: "); mouse_attach(0, unit); + printf("\n sl2: \n sl3: "); + if (rcline == 3) printf("( rconsole )"); + } else { +#endif /*NBM > 0*/ + printf("\n sl0:\n sl1:\n sl2:\n sl3: ( alternate console )"); +#if NBM > 0 + } +#endif +} + +/* + * Would you like to make a phone call ? + */ +dz7085_set_modem_control(sc, on) + dz7085_softc_t sc; + boolean_t on; +{ + if (on) + /* your problem if the hardware then is broke */ + sc->fake = 0; + else + sc->fake = DZ_MSR_CTS3|DZ_MSR_DSR3|DZ_MSR_CD3| + DZ_MSR_CTS2|DZ_MSR_CD2; +} + +/* + * Polled I/O (debugger) + */ +dz7085_pollc(unit, on) + boolean_t on; +{ + dz7085_softc_t sc = dz7085_softc[unit]; + + if (on) { + sc->polling_mode++; +#if NBM > 0 + screen_on_off(unit, TRUE); +#endif NBM > 0 + } else + sc->polling_mode--; +} + +/* + * Interrupt routine + */ +dz_intr(unit,spllevel) + spl_t spllevel; +{ + dz7085_softc_t sc = dz7085_softc[unit]; + register dz_padded_regmap_t *regs = sc->regs; + register short csr; + + csr = regs->dz_csr; + + if (csr & DZ_CSR_TRDY) { + register int c; + + c = cons_simple_tint(unit*NDZ_LINE + LINEOF(csr), FALSE); + if (c == -1) { + /* no more data for this line */ + regs->dz_tcr &= ~(1 << LINEOF(csr)); + c = cons_simple_tint(unit*NDZ_LINE + LINEOF(csr), TRUE); + /* because funny race possible ifnot */ + } + if (c != -1) { + regs->dz_tbuf = (c & 0xff) | sc->breaks; + /* and leave it enabled */ + } + } + if (sc->polling_mode) + return; + + while (regs->dz_csr & DZ_CSR_RDONE) { + short c = regs->dz_rbuf; + spl_t oldspl; + +#ifdef DECSTATION + oldspl = splhigh(); + splx(spllevel); +#endif /*DECSTATION*/ + cons_simple_rint(unit*NDZ_LINE+LINEOF(c), LINEOF(c), + c&0xff, c&0xff00); +#ifdef DECSTATION + splx(oldspl); +#endif /*DECSTATION*/ + } +} + +/* + * Start transmission on a line + */ +dz7085_start(tp) + struct tty *tp; +{ + register dz_padded_regmap_t *regs; + register int line; + + line = tp->t_dev; + + regs = (dz_padded_regmap_t*)tp->t_addr; + regs->dz_tcr |= (1<<(line&3)); + + /* no, we do not need a char out to interrupt */ +} + +/* + * Get a char from a specific DZ line + */ +dz7085_getc( unit, line, wait, raw ) + boolean_t wait; + boolean_t raw; +{ + dz7085_softc_t sc = dz7085_softc[unit]; + spl_t s = spltty(); + register dz_padded_regmap_t *regs = sc->regs; + unsigned short c; + int rl; + +again: + /* + * wait till something in silo + */ + while ((regs->dz_csr & DZ_CSR_RDONE) == 0 && wait) + delay(10); + c = regs->dz_rbuf; + + /* + * check if right line. For keyboard, rconsole is ok too + */ + rl = LINEOF(c); + if (wait && (line != rl) && + !((line == DZ_LINE_KEYBOARD) && rcline == rl)) + goto again; + /* + * bad chars not ok + */ + if ((c & (DZ_RBUF_PERR | DZ_RBUF_OERR | DZ_RBUF_FERR)) && wait) + goto again; + + splx(s); + + /* + * if nothing found return -1 + */ + if ( ! (c & DZ_RBUF_VALID)) + return -1; + +#if NBM > 0 + if ((rl == DZ_LINE_KEYBOARD) && !raw && SCREEN_ISA_CONSOLE()) + return lk201_rint(SCREEN_CONS_UNIT(), c, wait, sc->polling_mode); + else +#endif NBM > 0 + return c & DZ_RBUF_CHAR; +} + +/* + * Put a char on a specific DZ line + */ +dz7085_putc( unit, line, c ) +{ + dz7085_softc_t sc = dz7085_softc[unit]; + register dz_padded_regmap_t *regs = sc->regs; + spl_t s = spltty(); + + /* + * do not change the break status of other lines + */ + c = (c & 0xff) | sc->breaks; + + /* + * Xmit line info only valid if TRDY, + * but never TRDY if no xmit enabled + */ + if ((regs->dz_tcr & DZ_TCR_LNENB) == 0) + goto select_it; + + while ((regs->dz_csr & DZ_CSR_TRDY) == 0) + delay(100); + + /* + * see if by any chance we are already on the right line + */ + if (LINEOF(regs->dz_csr) == line) + regs->dz_tbuf = c; + else { + unsigned short tcr; +select_it: + tcr = regs->dz_tcr; + regs->dz_tcr = (1 << line) | (tcr & 0xff00); + wbflush(); + + do + delay(2); + while ((regs->dz_csr & DZ_CSR_TRDY) == 0 || + (LINEOF(regs->dz_csr) != line)); + + regs->dz_tbuf = c; + wbflush(); + + /* restore previous settings */ + regs->dz_tcr = tcr; + } + + splx(s); +} + + +dz7085_param(tp, line) + register struct tty *tp; + register int line; +{ + register dz_padded_regmap_t *regs; + register int lpr; + + line = tp->t_dev; + regs = dz7085_softc[line/NDZ_LINE]->regs; + + /* + * Do not let user fool around with kbd&mouse + */ +#if NBM > 0 + if (screen_captures(line)) { + tp->t_ispeed = tp->t_ospeed = B4800; + tp->t_flags |= TF_LITOUT; + } +#endif NBM > 0 + regs->dz_csr = DZ_CSR_MSE|DZ_CSR_RIE|DZ_CSR_TIE; + if (tp->t_ispeed == 0) { + (void) (*console_mctl)(tp->t_dev, TM_HUP, DMSET); /* hang up line */ + return; + } +/* 19200/38400 here */ + lpr = dz7085_speeds[tp->t_ispeed] | (line&DZ_LPAR_LINE) | DZ_LPAR_ENABLE; + lpr |= DZ_LPAR_8BITS; + + if ((tp->t_flags & (TF_ODDP|TF_EVENP)) == TF_ODDP) + lpr |= DZ_LPAR_ODD_PAR; + + if (tp->t_ispeed == B110) + lpr |= DZ_LPAR_STOP; + regs->dz_lpr = lpr; +} + +/* + * This is a total mess: not only are bits spread out in + * various registers, but we have to fake some for pmaxen. + */ +dz7085_mctl(dev, bits, how) + int dev; + int bits, how; +{ + register dz_padded_regmap_t *regs; + register int unit; + register int tcr, msr, brk, n_tcr, n_brk; + int b; + spl_t s; + dz7085_softc_t sc; + + unit = dev; + + /* no modem support on lines 0 & 1 */ +/* XXX break on 0&1 */ + if ((unit & 2) == 0) + return TM_LE|TM_DTR|TM_CTS|TM_CAR|TM_DSR; + + b = 1 ^ (unit & 1); /* line 2 ? */ + + sc = dz7085_softc[unit>>2]; + regs = sc->regs; + s = spltty(); + + tcr = ((regs->dz_tcr | (sc->fake>>4)) & 0xf00) >> (8 + b*2); + brk = (sc->breaks >> (8 + (unit&3))) & 1; /* THE break bit */ + + n_tcr = (bits & (TM_RTS|TM_DTR)) >> 1; + n_brk = (bits & TM_BRK) >> 9; + + /* break transitions, must 'send' a char out */ + bits = (brk ^ n_brk) & 1; + + switch (how) { + case DMSET: + tcr = n_tcr; + brk = n_brk; + break; + + case DMBIS: + tcr |= n_tcr; + brk |= n_brk; + break; + + case DMBIC: + tcr &= ~n_tcr; + brk = 0; + break; + + case DMGET: + msr = ((regs->dz_msr|sc->fake) & 0xf0f) >> (b*8); + (void) splx(s); + return (tcr<<1)|/* DTR, RTS */ + ((msr&1)<<5)|/* CTS */ + ((msr&2)<<7)|/* DSR */ + ((msr&0xc)<<4)|/* CD, RNG */ + (brk << 9)|/* BRK */ + TM_LE; + } + n_tcr = (regs->dz_tcr & ~(3 << (8 + b*2))) | + (tcr << (8 + b*2)); + + regs->dz_tcr = n_tcr; + sc->fake = (sc->fake & 0xf0f) | (n_tcr<<4&0xf000); + + sc->breaks = (sc->breaks & ~(1 << (8 + (unit&3)))) | + (brk << (8 + (unit&3))); + if(bits) (*console_putc)( unit>>2, unit&3, 0);/* force break, now */ + (void) splx(s); + return 0;/* useless to compute it */ +} + +/* + * Periodically look at the CD signals: + * they do not generate interrupts. + */ +dz7085_scan() +{ + register i; + register dz_padded_regmap_t *regs; + register msr; + register struct tty *tp; + + for (i = 0; i < NDZ_; i++) { + dz7085_softc_t sc = dz7085_softc[i]; + register int temp; + + if (sc == 0) + continue; + regs = sc->regs; + + tp = console_tty[i * NDZ_LINE]; + + msr = regs->dz_msr | (sc->fake & 0xf0f); + if (temp = sc->softCAR) { + if (temp & 0x4) + msr |= DZ_MSR_CD2 | DZ_MSR_CTS2; + if (temp & 0x8) + msr |= DZ_MSR_CD3 | DZ_MSR_CTS3; + } + + /* Lines 0 and 1 have carrier on by definition */ + /* [horrid casts cuz compiler stupid] */ + check_car((char*)tp + 0*sizeof(struct tty), 1); + check_car((char*)tp + 1*sizeof(struct tty), 1); + check_car((char*)tp + 2*sizeof(struct tty), msr & DZ_MSR_CD2); + check_car((char*)tp + 3*sizeof(struct tty), msr & DZ_MSR_CD3); + + /* nothing else to do if no msr transitions */ + if ((temp = sc->prev_msr) == msr) + continue; + else + sc->prev_msr = msr; + + /* see if we have an incoming call */ +#define RING (DZ_MSR_RI2|DZ_MSR_RI3) + if ((msr & RING) != (temp & RING)) { +/*printf("%s %x->%x\n", "ET Phone RI", temp & RING, msr & RING);*/ + check_ring((char*)tp + 2*sizeof(struct tty), + msr & DZ_MSR_RI2, temp & DZ_MSR_RI2); + check_ring((char*)tp + 3*sizeof(struct tty), + msr & DZ_MSR_RI3, temp & DZ_MSR_RI3); + } +#undef RING + /* see if we must do flow-control */ + if ((msr ^ temp) & DZ_MSR_CTS2) { + tty_cts((char*)tp + 2*sizeof(struct tty), + msr & DZ_MSR_CTS2); + } + if ((msr ^ temp) & DZ_MSR_CTS3) { + tty_cts((char*)tp + 3*sizeof(struct tty), + msr & DZ_MSR_CTS3); + } + } + timeout(dz7085_scan, (vm_offset_t)0, 2*hz); +} + +static dz7085_hup(tp) + register struct tty *tp; +{ + (*console_mctl)(tp->t_dev, TM_DTR, DMBIC); +} + +static void check_car(tp, car) + register struct tty *tp; +{ + if (car) { + /* cancel modem timeout if need to */ + if (car & (DZ_MSR_CD2|DZ_MSR_CD3)) + untimeout(dz7085_hup, (vm_offset_t)tp); + + /* I think this belongs in the MI code */ + if (tp->t_state & TS_WOPEN) + tp->t_state |= TS_ISOPEN; + /* carrier present */ + if ((tp->t_state & TS_CARR_ON) == 0) + (void)ttymodem(tp, 1); + } else if ((tp->t_state&TS_CARR_ON) && ttymodem(tp, 0) == 0) + (*console_mctl)( tp->t_dev, TM_DTR, DMBIC); +} + +int dz7085_ring_timeout = 60; /* seconds, patchable */ + +static void check_ring(tp, ring, oring) + register struct tty *tp; +{ + if (ring == oring) + return; + if (ring) { + (*console_mctl)( tp->t_dev, TM_DTR, DMBIS); + /* give it ample time to find the right carrier */ + timeout(dz7085_hup, (vm_offset_t)tp, dz7085_ring_timeout*hz); + } +} +#endif NDZ_ > 0 |