olpt.c revision 116431
148006Skato/* 248006Skato * Copyright (c) 1990 William F. Jolitz, TeleMuse 348006Skato * All rights reserved. 448006Skato * 548006Skato * Redistribution and use in source and binary forms, with or without 648006Skato * modification, are permitted provided that the following conditions 748006Skato * are met: 848006Skato * 1. Redistributions of source code must retain the above copyright 948006Skato * notice, this list of conditions and the following disclaimer. 1048006Skato * 2. Redistributions in binary form must reproduce the above copyright 1148006Skato * notice, this list of conditions and the following disclaimer in the 1248006Skato * documentation and/or other materials provided with the distribution. 1348006Skato * 3. All advertising materials mentioning features or use of this software 1448006Skato * must display the following acknowledgement: 1548006Skato * This software is a component of "386BSD" developed by 1648006Skato * William F. Jolitz, TeleMuse. 1748006Skato * 4. Neither the name of the developer nor the name "386BSD" 1848006Skato * may be used to endorse or promote products derived from this software 1948006Skato * without specific prior written permission. 2048006Skato * 2148006Skato * THIS SOFTWARE IS A COMPONENT OF 386BSD DEVELOPED BY WILLIAM F. JOLITZ 2248006Skato * AND IS INTENDED FOR RESEARCH AND EDUCATIONAL PURPOSES ONLY. THIS 2348006Skato * SOFTWARE SHOULD NOT BE CONSIDERED TO BE A COMMERCIAL PRODUCT. 2448006Skato * THE DEVELOPER URGES THAT USERS WHO REQUIRE A COMMERCIAL PRODUCT 2548006Skato * NOT MAKE USE OF THIS WORK. 2648006Skato * 2748006Skato * FOR USERS WHO WISH TO UNDERSTAND THE 386BSD SYSTEM DEVELOPED 2848006Skato * BY WILLIAM F. JOLITZ, WE RECOMMEND THE USER STUDY WRITTEN 2948006Skato * REFERENCES SUCH AS THE "PORTING UNIX TO THE 386" SERIES 3048006Skato * (BEGINNING JANUARY 1991 "DR. DOBBS JOURNAL", USA AND BEGINNING 3148006Skato * JUNE 1991 "UNIX MAGAZIN", GERMANY) BY WILLIAM F. JOLITZ AND 3248006Skato * LYNNE GREER JOLITZ, AS WELL AS OTHER BOOKS ON UNIX AND THE 3348006Skato * ON-LINE 386BSD USER MANUAL BEFORE USE. A BOOK DISCUSSING THE INTERNALS 3448006Skato * OF 386BSD ENTITLED "386BSD FROM THE INSIDE OUT" WILL BE AVAILABLE LATE 1992. 3548006Skato * 3648006Skato * THIS SOFTWARE IS PROVIDED BY THE DEVELOPER ``AS IS'' AND 3748006Skato * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 3848006Skato * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 3948006Skato * ARE DISCLAIMED. IN NO EVENT SHALL THE DEVELOPER BE LIABLE 4048006Skato * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 4148006Skato * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 4248006Skato * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 4348006Skato * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 4448006Skato * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 4548006Skato * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 4648006Skato * SUCH DAMAGE. 4748006Skato * 4848006Skato * from: unknown origin, 386BSD 0.1 4950477Speter * $FreeBSD: head/sys/pc98/cbus/olpt.c 116431 2003-06-16 07:41:47Z phk $ 5048006Skato */ 5148006Skato 5248006Skato/* 5348006Skato * Device Driver for AT parallel printer port 5448006Skato * Written by William Jolitz 12/18/90 5548006Skato */ 5648006Skato 5748006Skato/* 5848006Skato * Parallel port TCP/IP interfaces added. I looked at the driver from 5948006Skato * MACH but this is a complete rewrite, and btw. incompatible, and it 6048006Skato * should perform better too. I have never run the MACH driver though. 6148006Skato * 6248006Skato * This driver sends two bytes (0x08, 0x00) in front of each packet, 6348006Skato * to allow us to distinguish another format later. 6448006Skato * 65108470Sschweikh * Now added a Linux/Crynwr compatibility mode which is enabled using 6648006Skato * IF_LINK0 - Tim Wilkinson. 6748006Skato * 6848006Skato * TODO: 6948006Skato * Make HDLC/PPP mode, use IF_LLC1 to enable. 7048006Skato * 7148006Skato * Connect the two computers using a Laplink parallel cable to use this 7248006Skato * feature: 7348006Skato * 7448006Skato * +----------------------------------------+ 7548006Skato * |A-name A-End B-End Descr. Port/Bit | 7648006Skato * +----------------------------------------+ 7748006Skato * |DATA0 2 15 Data 0/0x01 | 7848006Skato * |-ERROR 15 2 1/0x08 | 7948006Skato * +----------------------------------------+ 8048006Skato * |DATA1 3 13 Data 0/0x02 | 8148006Skato * |+SLCT 13 3 1/0x10 | 8248006Skato * +----------------------------------------+ 8348006Skato * |DATA2 4 12 Data 0/0x04 | 8448006Skato * |+PE 12 4 1/0x20 | 8548006Skato * +----------------------------------------+ 8648006Skato * |DATA3 5 10 Strobe 0/0x08 | 8748006Skato * |-ACK 10 5 1/0x40 | 8848006Skato * +----------------------------------------+ 8948006Skato * |DATA4 6 11 Data 0/0x10 | 9048006Skato * |BUSY 11 6 1/~0x80 | 9148006Skato * +----------------------------------------+ 9248006Skato * |GND 18-25 18-25 GND - | 9348006Skato * +----------------------------------------+ 9448006Skato * 9548006Skato * Expect transfer-rates up to 75 kbyte/sec. 9648006Skato * 9748006Skato * If GCC could correctly grok 9848006Skato * register int port asm("edx") 9948006Skato * the code would be cleaner 10048006Skato * 10148006Skato * Poul-Henning Kamp <phk@freebsd.org> 10248006Skato */ 10348006Skato 10448006Skato#include <sys/param.h> 10548006Skato#include <sys/systm.h> 10648006Skato#include <sys/conf.h> 10761116Snyan#include <sys/bus.h> 10848006Skato#include <sys/kernel.h> 10948006Skato#include <sys/uio.h> 11048006Skato#include <sys/syslog.h> 111116431Sphk#include <sys/malloc.h> 11248006Skato 11380537Snyan#include <machine/clock.h> 11480537Snyan#include <machine/bus.h> 11580537Snyan#include <machine/resource.h> 11680537Snyan#include <sys/rman.h> 11780537Snyan 11880537Snyan#include <isa/isavar.h> 11980537Snyan 12048006Skato#include <i386/isa/lptreg.h> 12160950Snyan#include <dev/ppbus/lptio.h> 12248006Skato 12348006Skato#define LPINITRDY 4 /* wait up to 4 seconds for a ready */ 12448006Skato#define LPTOUTINITIAL 10 /* initial timeout to wait for ready 1/10 s */ 12548006Skato#define LPTOUTMAX 1 /* maximal timeout 1 s */ 12648006Skato#define LPPRI (PZERO+8) 12748006Skato#define BUFSIZE 1024 12848006Skato 12948006Skato#ifndef PC98 13048006Skato/* BIOS printer list - used by BIOS probe*/ 13148006Skato#define BIOS_LPT_PORTS 0x408 13248006Skato#define BIOS_PORTS (short *)(KERNBASE+BIOS_LPT_PORTS) 13348006Skato#define BIOS_MAX_LPT 4 13448006Skato#endif 13548006Skato 13648006Skato 13748006Skato#ifndef DEBUG 13848006Skato#define lprintf(args) 13948006Skato#else 14048006Skato#define lprintf(args) do { \ 14148006Skato if (lptflag) \ 14248006Skato printf args; \ 14348006Skato } while (0) 14448006Skatostatic int volatile lptflag = 1; 14548006Skato#endif 14648006Skato 14748006Skato#define LPTUNIT(s) ((s)&0x03) 14848006Skato#define LPTFLAGS(s) ((s)&0xfc) 14948006Skato 15080537Snyanstruct lpt_softc { 15180537Snyan struct resource *res_port; 15280537Snyan struct resource *res_irq; 15380537Snyan void *sc_ih; 15480537Snyan 15548006Skato int sc_port; 15648006Skato short sc_state; 15748006Skato /* default case: negative prime, negative ack, handshake strobe, 15848006Skato prime once */ 15948006Skato u_char sc_control; 16048006Skato char sc_flags; 16148006Skato#define LP_POS_INIT 0x04 /* if we are a postive init signal */ 16248006Skato#define LP_POS_ACK 0x08 /* if we are a positive going ack */ 16348006Skato#define LP_NO_PRIME 0x10 /* don't prime the printer at all */ 16448006Skato#define LP_PRIMEOPEN 0x20 /* prime on every open */ 16548006Skato#define LP_AUTOLF 0x40 /* tell printer to do an automatic lf */ 16648006Skato#define LP_BYPASS 0x80 /* bypass printer ready checks */ 167116431Sphk void *sc_inbuf; 16848006Skato short sc_xfercnt ; 16948006Skato char sc_primed; 17048006Skato char *sc_cp ; 17148006Skato u_char sc_irq ; /* IRQ status of port */ 17248006Skato#define LP_HAS_IRQ 0x01 /* we have an irq available */ 17348006Skato#define LP_USE_IRQ 0x02 /* we are using our irq */ 17448006Skato#define LP_ENABLE_IRQ 0x04 /* enable IRQ on open */ 17548006Skato u_char sc_backoff ; /* time to call lptout() again */ 17680537Snyan}; 17748006Skato 17848006Skato/* bits for state */ 17948006Skato#define OPEN (1<<0) /* device is open */ 18048006Skato#define ASLP (1<<1) /* awaiting draining of printer */ 18148006Skato#define ERROR (1<<2) /* error was received from printer */ 18248006Skato#define OBUSY (1<<3) /* printer is busy doing output */ 18348006Skato#define LPTOUT (1<<4) /* timeout while not selected */ 18448006Skato#define TOUT (1<<5) /* timeout while not selected */ 18548006Skato#define INIT (1<<6) /* waiting to initialize for open */ 18648006Skato#define INTERRUPTED (1<<7) /* write call was interrupted */ 18748006Skato 18848006Skato 18948006Skato/* status masks to interrogate printer status */ 19048006Skato#define RDY_MASK (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR) /* ready ? */ 19148006Skato#define LP_READY (LPS_SEL|LPS_NBSY|LPS_NERR) 19248006Skato 19348006Skato/* Printer Ready condition - from lpa.c */ 19448006Skato/* Only used in polling code */ 19548006Skato#ifdef PC98 19648006Skato#define NOT_READY(x) ((inb(x) & LPS_NBSY) != LPS_NBSY) 19748006Skato#else /* IBM-PC */ 19848006Skato#define LPS_INVERT (LPS_NBSY | LPS_NACK | LPS_SEL | LPS_NERR) 19948006Skato#define LPS_MASK (LPS_NBSY | LPS_NACK | LPS_OUT | LPS_SEL | LPS_NERR) 20048006Skato#define NOT_READY(x) ((inb(x)^LPS_INVERT)&LPS_MASK) 20148006Skato#endif 20248006Skato 20348006Skato#define MAX_SLEEP (hz*5) /* Timeout while waiting for device ready */ 20448006Skato#define MAX_SPIN 20 /* Max delay for device ready in usecs */ 20548006Skato 20648006Skatostatic timeout_t lptout; 20780537Snyanstatic int lpt_probe(device_t); 20880537Snyanstatic int lpt_attach(device_t); 20980537Snyanstatic void lpt_intr(void *); 21048006Skato 21180537Snyanstatic devclass_t olpt_devclass; 21280537Snyan 21380537Snyanstatic device_method_t olpt_methods[] = { 21480537Snyan DEVMETHOD(device_probe, lpt_probe), 21580537Snyan DEVMETHOD(device_attach, lpt_attach), 21680537Snyan { 0, 0 } 21748006Skato}; 21848006Skato 21980537Snyanstatic driver_t olpt_driver = { 22080537Snyan "olpt", 22180537Snyan olpt_methods, 22280537Snyan sizeof (struct lpt_softc), 22380537Snyan}; 22480537Snyan 22580537SnyanDRIVER_MODULE(olpt, isa, olpt_driver, olpt_devclass, 0, 0); 22680537Snyan 22748006Skatostatic d_open_t lptopen; 22848006Skatostatic d_close_t lptclose; 22948006Skatostatic d_write_t lptwrite; 23048006Skatostatic d_ioctl_t lptioctl; 23148006Skato 23248006Skato#define CDEV_MAJOR 16 23348006Skatostatic struct cdevsw lpt_cdevsw = { 234111815Sphk .d_open = lptopen, 235111815Sphk .d_close = lptclose, 236111815Sphk .d_write = lptwrite, 237111815Sphk .d_ioctl = lptioctl, 238111815Sphk .d_name = "lpt", 239111815Sphk .d_maj = CDEV_MAJOR, 24048006Skato}; 24148006Skato 24280537Snyanstatic bus_addr_t lpt_iat[] = {0, 2, 4, 6}; 24380537Snyan 24448006Skato#ifndef PC98 24548006Skato/* 24648006Skato * Internal routine to lptprobe to do port tests of one byte value 24748006Skato */ 24848006Skatostatic int 24948006Skatolpt_port_test (int port, u_char data, u_char mask) 25048006Skato{ 25148006Skato int temp, timeout; 25248006Skato 25348006Skato data = data & mask; 25448006Skato outb(port, data); 25548006Skato timeout = 10000; 25648006Skato do { 25748006Skato DELAY(10); 25848006Skato temp = inb(port) & mask; 25948006Skato } 26048006Skato while (temp != data && --timeout); 26148006Skato lprintf(("Port 0x%x\tout=%x\tin=%x\ttout=%d\n", 26248006Skato port, data, temp, timeout)); 26348006Skato return (temp == data); 26448006Skato} 26548006Skato#endif /* PC98 */ 26648006Skato 26748006Skato/* 26848006Skato * New lpt port probe Geoff Rehmet - Rhodes University - 14/2/94 26948006Skato * Based partially on Rod Grimes' printer probe 27048006Skato * 27148006Skato * Logic: 27248006Skato * 1) If no port address was given, use the bios detected ports 27348006Skato * and autodetect what ports the printers are on. 27448006Skato * 2) Otherwise, probe the data port at the address given, 27548006Skato * using the method in Rod Grimes' port probe. 27648006Skato * (Much code ripped off directly from Rod's probe.) 27748006Skato * 27848006Skato * Comments from Rod's probe: 27948006Skato * Logic: 28048006Skato * 1) You should be able to write to and read back the same value 28148006Skato * to the data port. Do an alternating zeros, alternating ones, 28248006Skato * walking zero, and walking one test to check for stuck bits. 28348006Skato * 28448006Skato * 2) You should be able to write to and read back the same value 28548006Skato * to the control port lower 5 bits, the upper 3 bits are reserved 28648006Skato * per the IBM PC technical reference manauls and different boards 28748006Skato * do different things with them. Do an alternating zeros, alternating 28848006Skato * ones, walking zero, and walking one test to check for stuck bits. 28948006Skato * 29048006Skato * Some printers drag the strobe line down when the are powered off 29148006Skato * so this bit has been masked out of the control port test. 29248006Skato * 29348006Skato * XXX Some printers may not like a fast pulse on init or strobe, I 29448006Skato * don't know at this point, if that becomes a problem these bits 29548006Skato * should be turned off in the mask byte for the control port test. 29648006Skato * 29748006Skato * We are finally left with a mask of 0x14, due to some printers 29848006Skato * being adamant about holding other bits high ........ 29948006Skato * 30048006Skato * Before probing the control port, we write a 0 to the data port - 30148006Skato * If not, some printers chuck out garbage when the strobe line 30248006Skato * gets toggled. 30348006Skato * 30448006Skato * 3) Set the data and control ports to a value of 0 30548006Skato * 30648006Skato * This probe routine has been tested on Epson Lx-800, HP LJ3P, 30748006Skato * Epson FX-1170 and C.Itoh 8510RM 30848006Skato * printers. 30948006Skato * Quick exit on fail added. 31048006Skato */ 31148006Skato 31248006Skatoint 31380537Snyanlpt_probe(device_t dev) 31448006Skato{ 31548006Skato#ifdef PC98 31648006Skato#define PC98_OLD_LPT 0x40 31748006Skato#define PC98_IEEE_1284_FUNCTION 0x149 31880537Snyan int rid; 31980537Snyan struct resource *res; 32048006Skato 32180537Snyan /* Check isapnp ids */ 32280537Snyan if (isa_get_vendorid(dev)) 32380537Snyan return ENXIO; 32480537Snyan 32580537Snyan rid = 0; 32680537Snyan res = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid, lpt_iat, 4, 32780537Snyan RF_ACTIVE); 32880537Snyan if (res == NULL) 32980537Snyan return ENXIO; 33080537Snyan isa_load_resourcev(res, lpt_iat, 4); 33180537Snyan 33280537Snyan if (isa_get_port(dev) == PC98_OLD_LPT) { 33380537Snyan unsigned int pc98_ieee_mode, tmp; 33480537Snyan 33548006Skato tmp = inb(PC98_IEEE_1284_FUNCTION); 33648006Skato pc98_ieee_mode = tmp; 33748006Skato if ((tmp & 0x10) == 0x10) { 33848006Skato outb(PC98_IEEE_1284_FUNCTION, tmp & ~0x10); 33948006Skato tmp = inb(PC98_IEEE_1284_FUNCTION); 34048006Skato if ((tmp & 0x10) != 0x10) { 34148006Skato outb(PC98_IEEE_1284_FUNCTION, pc98_ieee_mode); 34280537Snyan bus_release_resource(dev, SYS_RES_IOPORT, rid, 34380537Snyan res); 34480537Snyan return ENXIO; 34548006Skato } 34648006Skato } 34748006Skato } 34880537Snyan 34980537Snyan bus_release_resource(dev, SYS_RES_IOPORT, rid, res); 35080537Snyan return 0; 35148006Skato#else 35248006Skato int port; 35348006Skato static short next_bios_lpt = 0; 35448006Skato int status; 35548006Skato static u_char testbyte[18] = { 35648006Skato 0x55, /* alternating zeros */ 35748006Skato 0xaa, /* alternating ones */ 35848006Skato 0xfe, 0xfd, 0xfb, 0xf7, 35948006Skato 0xef, 0xdf, 0xbf, 0x7f, /* walking zero */ 36048006Skato 0x01, 0x02, 0x04, 0x08, 36148006Skato 0x10, 0x20, 0x40, 0x80 /* walking one */ 36248006Skato }; 36348006Skato int i; 36448006Skato 36548006Skato /* 36648006Skato * Make sure there is some way for lptopen to see that 36748006Skato * the port is not configured 36848006Skato * This 0 will remain if the port isn't attached 36948006Skato */ 37048006Skato (lpt_sc + dvp->id_unit)->sc_port = 0; 37148006Skato 37248006Skato status = IO_LPTSIZE; 37348006Skato /* If port not specified, use bios list */ 37448006Skato if(dvp->id_iobase < 0) { /* port? */ 37548006Skato if((next_bios_lpt < BIOS_MAX_LPT) && 37648006Skato (*(BIOS_PORTS+next_bios_lpt) != 0) ) { 37748006Skato dvp->id_iobase = *(BIOS_PORTS+next_bios_lpt++); 37848006Skato goto end_probe; 37948006Skato } else 38048006Skato return (0); 38148006Skato } 38248006Skato 38348006Skato /* Port was explicitly specified */ 38448006Skato /* This allows probing of ports unknown to the BIOS */ 38548006Skato port = dvp->id_iobase + lpt_data; 38648006Skato for (i = 0; i < 18; i++) { 38748006Skato if (!lpt_port_test(port, testbyte[i], 0xff)) { 38848006Skato status = 0; 38948006Skato goto end_probe; 39048006Skato } 39148006Skato } 39248006Skato 39348006Skatoend_probe: 39448006Skato /* write 0's to control and data ports */ 39548006Skato outb(dvp->id_iobase+lpt_data, 0); 39648006Skato outb(dvp->id_iobase+lpt_control, 0); 39748006Skato 39848006Skato return (status); 39948006Skato#endif 40048006Skato} 40148006Skato 40248006Skato/* XXX Todo - try and detect if interrupt is working */ 40348006Skatoint 40480537Snyanlpt_attach(device_t dev) 40548006Skato{ 40680537Snyan int rid, unit; 40748006Skato struct lpt_softc *sc; 40848006Skato 40980537Snyan unit = device_get_unit(dev); 41080537Snyan sc = device_get_softc(dev); 41180537Snyan 41280537Snyan rid = 0; 41380537Snyan sc->res_port = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid, 41480537Snyan lpt_iat, 4, RF_ACTIVE); 41580537Snyan if (sc->res_port == NULL) 41680537Snyan return ENXIO; 41780537Snyan isa_load_resourcev(sc->res_port, lpt_iat, 4); 41880537Snyan 41980537Snyan sc->sc_port = rman_get_start(sc->res_port); 42048006Skato sc->sc_primed = 0; /* not primed yet */ 42148006Skato#ifdef PC98 42248006Skato outb(sc->sc_port+lpt_pstb_ctrl, LPC_DIS_PSTB); /* PSTB disable */ 42348006Skato outb(sc->sc_port+lpt_control, LPC_MODE8255); /* 8255 mode set */ 42448006Skato outb(sc->sc_port+lpt_control, LPC_NIRQ8); /* IRQ8 inactive */ 42548006Skato outb(sc->sc_port+lpt_control, LPC_NPSTB); /* PSTB inactive */ 42648006Skato outb(sc->sc_port+lpt_pstb_ctrl, LPC_EN_PSTB); /* PSTB enable */ 42748006Skato#else 42848006Skato outb(sc->sc_port+lpt_control, LPC_NINIT); 42948006Skato#endif 43048006Skato 43180537Snyan sc->sc_irq = 0; 43280537Snyan if (isa_get_irq(dev) != -1) { 43380537Snyan rid = 0; 43480537Snyan sc->res_irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 43580537Snyan 0, ~0, 1, RF_ACTIVE); 43680537Snyan if (sc->res_irq == NULL) { 43780537Snyan bus_release_resource(dev, SYS_RES_IOPORT, 0, 43880537Snyan sc->res_port); 43980537Snyan return ENXIO; 44080537Snyan } 44180537Snyan if (bus_setup_intr(dev, sc->res_irq, INTR_TYPE_TTY, lpt_intr, 44280537Snyan sc, &sc->sc_ih)) { 44380537Snyan bus_release_resource(dev, SYS_RES_IOPORT, 0, 44480537Snyan sc->res_port); 44580537Snyan bus_release_resource(dev, SYS_RES_IRQ, 0, 44680537Snyan sc->res_irq); 44780537Snyan return ENXIO; 44880537Snyan } 44948006Skato sc->sc_irq = LP_HAS_IRQ | LP_USE_IRQ | LP_ENABLE_IRQ; 45080537Snyan device_printf(dev, "Interrupt-driven port"); 45148006Skato } 45248006Skato 45348006Skato /* XXX what to do about the flags in the minor number? */ 45450436Sjulian make_dev(&lpt_cdevsw, unit, UID_ROOT, GID_WHEEL, 0600, "lpt%d", unit); 45550436Sjulian make_dev(&lpt_cdevsw, unit | LP_BYPASS, 45650436Sjulian UID_ROOT, GID_WHEEL, 0600, "lpctl%d", unit); 45758142Snyan 45880537Snyan return 0; 45948006Skato} 46048006Skato 46148006Skato/* 46248006Skato * lptopen -- reset the printer, then wait until it's selected and not busy. 46348006Skato * If LP_BYPASS flag is selected, then we do not try to select the 46448006Skato * printer -- this is just used for passing ioctls. 46548006Skato */ 46648006Skato 46748006Skatostatic int 46883430Simplptopen (dev_t dev, int flags, int fmt, struct thread *td) 46948006Skato{ 47048006Skato struct lpt_softc *sc; 47148006Skato int s; 47248006Skato#ifdef PC98 47348006Skato int port; 47448006Skato#else 47548006Skato int trys, port; 47648006Skato#endif 47748006Skato 47880537Snyan sc = devclass_get_softc(olpt_devclass, LPTUNIT(minor(dev))); 47980537Snyan if (sc->sc_port == 0) 48048006Skato return (ENXIO); 48148006Skato 48248006Skato if (sc->sc_state) { 48348006Skato lprintf(("lp: still open %x\n", sc->sc_state)); 48448006Skato return(EBUSY); 48548006Skato } else 48648006Skato sc->sc_state |= INIT; 48748006Skato 48848006Skato sc->sc_flags = LPTFLAGS(minor(dev)); 48948006Skato 49048006Skato /* Check for open with BYPASS flag set. */ 49148006Skato if (sc->sc_flags & LP_BYPASS) { 49248006Skato sc->sc_state = OPEN; 49348006Skato return(0); 49448006Skato } 49548006Skato 49648006Skato s = spltty(); 49748006Skato lprintf(("lp flags 0x%x\n", sc->sc_flags)); 49848006Skato port = sc->sc_port; 49948006Skato 50048006Skato /* set IRQ status according to ENABLE_IRQ flag */ 50148006Skato if (sc->sc_irq & LP_ENABLE_IRQ) 50248006Skato sc->sc_irq |= LP_USE_IRQ; 50348006Skato else 50448006Skato sc->sc_irq &= ~LP_USE_IRQ; 50548006Skato 50648006Skato /* init printer */ 50748006Skato#ifndef PC98 50848006Skato if ((sc->sc_flags & LP_NO_PRIME) == 0) { 50948006Skato if((sc->sc_flags & LP_PRIMEOPEN) || sc->sc_primed == 0) { 51048006Skato outb(port+lpt_control, 0); 51148006Skato sc->sc_primed++; 51248006Skato DELAY(500); 51348006Skato } 51448006Skato } 51548006Skato 51648006Skato outb (port+lpt_control, LPC_SEL|LPC_NINIT); 51748006Skato 51848006Skato /* wait till ready (printer running diagnostics) */ 51948006Skato trys = 0; 52048006Skato do { 52148006Skato /* ran out of waiting for the printer */ 52248006Skato if (trys++ >= LPINITRDY*4) { 52348006Skato splx(s); 52448006Skato sc->sc_state = 0; 52548006Skato lprintf(("status %x\n", inb(port+lpt_status))); 52648006Skato return (EBUSY); 52748006Skato } 52848006Skato 52948006Skato /* wait 1/4 second, give up if we get a signal */ 530111748Sdes if (tsleep (sc, LPPRI|PCATCH, "lptinit", hz/4) != 53148006Skato EWOULDBLOCK) { 53248006Skato sc->sc_state = 0; 53348006Skato splx(s); 53448006Skato return (EBUSY); 53548006Skato } 53648006Skato 53748006Skato /* is printer online and ready for output */ 53848006Skato } while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) != 53948006Skato (LPS_SEL|LPS_NBSY|LPS_NERR)); 54048006Skato 54148006Skato sc->sc_control = LPC_SEL|LPC_NINIT; 54248006Skato if (sc->sc_flags & LP_AUTOLF) 54348006Skato sc->sc_control |= LPC_AUTOL; 54448006Skato 54548006Skato /* enable interrupt if interrupt-driven */ 54648006Skato if (sc->sc_irq & LP_USE_IRQ) 54748006Skato sc->sc_control |= LPC_ENA; 54848006Skato 54948006Skato outb(port+lpt_control, sc->sc_control); 55048006Skato#endif 55148006Skato 55248006Skato sc->sc_state = OPEN; 553116431Sphk sc->sc_inbuf = malloc(BUFSIZE, M_DEVBUF, M_WAITOK); 55448006Skato sc->sc_xfercnt = 0; 55548006Skato splx(s); 55648006Skato 55748006Skato /* only use timeout if using interrupt */ 55848006Skato lprintf(("irq %x\n", sc->sc_irq)); 55948006Skato if (sc->sc_irq & LP_USE_IRQ) { 56048006Skato sc->sc_state |= TOUT; 56148006Skato timeout (lptout, (caddr_t)sc, 56248006Skato (sc->sc_backoff = hz/LPTOUTINITIAL)); 56348006Skato } 56448006Skato 56548006Skato lprintf(("opened.\n")); 56648006Skato return(0); 56748006Skato} 56848006Skato 56948006Skatostatic void 57048006Skatolptout (void *arg) 57148006Skato{ 57248006Skato struct lpt_softc *sc = arg; 57348006Skato int pl; 57448006Skato 57548006Skato lprintf(("T %x ", inb(sc->sc_port+lpt_status))); 57648006Skato if (sc->sc_state & OPEN) { 57748006Skato sc->sc_backoff++; 57848006Skato if (sc->sc_backoff > hz/LPTOUTMAX) 57948006Skato sc->sc_backoff = sc->sc_backoff > hz/LPTOUTMAX; 58048006Skato timeout (lptout, (caddr_t)sc, sc->sc_backoff); 58148006Skato } else 58248006Skato sc->sc_state &= ~TOUT; 58348006Skato 58448006Skato if (sc->sc_state & ERROR) 58548006Skato sc->sc_state &= ~ERROR; 58648006Skato 58748006Skato /* 58848006Skato * Avoid possible hangs do to missed interrupts 58948006Skato */ 59048006Skato if (sc->sc_xfercnt) { 59148006Skato pl = spltty(); 59280537Snyan lpt_intr(sc); 59348006Skato splx(pl); 59448006Skato } else { 59548006Skato sc->sc_state &= ~OBUSY; 596111748Sdes wakeup(sc); 59748006Skato } 59848006Skato} 59948006Skato 60048006Skato/* 60148006Skato * lptclose -- close the device, free the local line buffer. 60248006Skato * 60348006Skato * Check for interrupted write call added. 60448006Skato */ 60548006Skato 60648006Skatostatic int 60783430Simplptclose(dev_t dev, int flags, int fmt, struct thread *td) 60848006Skato{ 60980537Snyan struct lpt_softc *sc; 61048006Skato#ifndef PC98 61180537Snyan int port; 61248006Skato#endif 61348006Skato 61480537Snyan sc = devclass_get_softc(olpt_devclass, LPTUNIT(minor(dev))); 61548006Skato if(sc->sc_flags & LP_BYPASS) 61648006Skato goto end_close; 61748006Skato 61880537Snyan#ifndef PC98 61980537Snyan port = sc->sc_port; 62080537Snyan#endif 62148006Skato sc->sc_state &= ~OPEN; 62248006Skato 62348006Skato#ifndef PC98 62448006Skato /* if the last write was interrupted, don't complete it */ 62548006Skato if((!(sc->sc_state & INTERRUPTED)) && (sc->sc_irq & LP_USE_IRQ)) 62648006Skato while ((inb(port+lpt_status) & (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR)) != 62748006Skato (LPS_SEL|LPS_NBSY|LPS_NERR) || sc->sc_xfercnt) 62848006Skato /* wait 1/4 second, give up if we get a signal */ 629111748Sdes if (tsleep (sc, LPPRI|PCATCH, 63048006Skato "lpclose", hz) != EWOULDBLOCK) 63148006Skato break; 63248006Skato 63348006Skato outb(sc->sc_port+lpt_control, LPC_NINIT); 63448006Skato#endif 635116431Sphk free(sc->sc_inbuf, M_DEVBUF); 63648006Skato 63748006Skatoend_close: 63848006Skato sc->sc_state = 0; 63948006Skato sc->sc_xfercnt = 0; 64048006Skato lprintf(("closed.\n")); 64148006Skato return(0); 64248006Skato} 64348006Skato 64448006Skato/* 64548006Skato * pushbytes() 64648006Skato * Workhorse for actually spinning and writing bytes to printer 64748006Skato * Derived from lpa.c 64848006Skato * Originally by ? 64948006Skato * 65048006Skato * This code is only used when we are polling the port 65148006Skato */ 65248006Skatostatic int 65348006Skatopushbytes(struct lpt_softc * sc) 65448006Skato{ 65548006Skato int spin, err, tic; 65648006Skato char ch; 65748006Skato int port = sc->sc_port; 65848006Skato 65948006Skato lprintf(("p")); 66048006Skato /* loop for every character .. */ 66148006Skato while (sc->sc_xfercnt > 0) { 66248006Skato /* printer data */ 66348006Skato ch = *(sc->sc_cp); 66448006Skato sc->sc_cp++; 66548006Skato sc->sc_xfercnt--; 66648006Skato 66748006Skato /* 66848006Skato * Wait for printer ready. 66948006Skato * Loop 20 usecs testing BUSY bit, then sleep 67048006Skato * for exponentially increasing timeout. (vak) 67148006Skato */ 67248006Skato for (spin=0; NOT_READY(port+lpt_status) && spin<MAX_SPIN; ++spin) 67348006Skato DELAY(1); /* XXX delay is NOT this accurate! */ 67448006Skato if (spin >= MAX_SPIN) { 67548006Skato tic = 0; 67648006Skato while (NOT_READY(port+lpt_status)) { 67748006Skato /* 67848006Skato * Now sleep, every cycle a 67948006Skato * little longer .. 68048006Skato */ 68148006Skato tic = tic + tic + 1; 68248006Skato /* 68348006Skato * But no more than 10 seconds. (vak) 68448006Skato */ 68548006Skato if (tic > MAX_SLEEP) 68648006Skato tic = MAX_SLEEP; 687111748Sdes err = tsleep(sc, LPPRI, 68848006Skato "lptpoll", tic); 68948006Skato if (err != EWOULDBLOCK) { 69048006Skato return (err); 69148006Skato } 69248006Skato } 69348006Skato } 69448006Skato 69548006Skato /* output data */ 69648006Skato outb(port+lpt_data, ch); 69748006Skato#ifdef PC98 69848006Skato DELAY(1); 69948006Skato outb(port+lpt_control, LPC_PSTB); 70048006Skato DELAY(1); 70148006Skato outb(port+lpt_control, LPC_NPSTB); 70248006Skato#else 70348006Skato /* strobe */ 70448006Skato outb(port+lpt_control, sc->sc_control|LPC_STB); 70548006Skato outb(port+lpt_control, sc->sc_control); 70648006Skato#endif 70748006Skato 70848006Skato } 70948006Skato return(0); 71048006Skato} 71148006Skato 71248006Skato/* 71348006Skato * lptwrite --copy a line from user space to a local buffer, then call 71448006Skato * putc to get the chars moved to the output queue. 71548006Skato * 71648006Skato * Flagging of interrupted write added. 71748006Skato */ 71848006Skato 71948006Skatostatic int 72048006Skatolptwrite(dev_t dev, struct uio * uio, int ioflag) 72148006Skato{ 72248006Skato register unsigned n; 72348006Skato int pl, err; 72480537Snyan struct lpt_softc *sc; 72548006Skato 72680537Snyan sc = devclass_get_softc(olpt_devclass, LPTUNIT(minor(dev))); 72748006Skato if(sc->sc_flags & LP_BYPASS) { 72848006Skato /* we can't do writes in bypass mode */ 72948006Skato return(EPERM); 73048006Skato } 73148006Skato 73248006Skato sc->sc_state &= ~INTERRUPTED; 73348006Skato while ((n = min(BUFSIZE, uio->uio_resid)) != 0) { 734116431Sphk sc->sc_cp = sc->sc_inbuf; 73548006Skato uiomove(sc->sc_cp, n, uio); 73648006Skato sc->sc_xfercnt = n ; 73748006Skato while ((sc->sc_xfercnt > 0)&&(sc->sc_irq & LP_USE_IRQ)) { 73848006Skato lprintf(("i")); 73948006Skato /* if the printer is ready for a char, */ 74048006Skato /* give it one */ 74148006Skato if ((sc->sc_state & OBUSY) == 0){ 74248006Skato lprintf(("\nC %d. ", sc->sc_xfercnt)); 74348006Skato pl = spltty(); 74480537Snyan lpt_intr(sc); 74548006Skato (void) splx(pl); 74648006Skato } 74748006Skato lprintf(("W ")); 74848006Skato if (sc->sc_state & OBUSY) 749111748Sdes if ((err = tsleep (sc, 75048006Skato LPPRI|PCATCH, "lpwrite", 0))) { 75148006Skato sc->sc_state |= INTERRUPTED; 75248006Skato return(err); 75348006Skato } 75448006Skato } 75548006Skato /* check to see if we must do a polled write */ 75648006Skato if(!(sc->sc_irq & LP_USE_IRQ) && (sc->sc_xfercnt)) { 75748006Skato lprintf(("p")); 75848006Skato if((err = pushbytes(sc))) 75948006Skato return(err); 76048006Skato } 76148006Skato } 76248006Skato return(0); 76348006Skato} 76448006Skato 76548006Skato/* 76648006Skato * lptintr -- handle printer interrupts which occur when the printer is 76748006Skato * ready to accept another char. 76848006Skato * 76948006Skato * do checking for interrupted write call. 77048006Skato */ 77148006Skato 77248006Skatostatic void 77380537Snyanlpt_intr(void *arg) 77448006Skato{ 77548006Skato} 77648006Skato 77748006Skatostatic int 77883430Simplptioctl(dev_t dev, u_long cmd, caddr_t data, int flags, struct thread *td) 77948006Skato{ 78048006Skato int error = 0; 78148006Skato struct lpt_softc *sc; 78248006Skato u_int unit = LPTUNIT(minor(dev)); 78348006Skato u_char old_sc_irq; /* old printer IRQ status */ 78448006Skato 78580537Snyan sc = devclass_get_softc(olpt_devclass, unit); 78648006Skato 78748006Skato switch (cmd) { 78848006Skato case LPT_IRQ : 78948006Skato if(sc->sc_irq & LP_HAS_IRQ) { 79048006Skato /* 79148006Skato * NOTE: 79248006Skato * If the IRQ status is changed, 79348006Skato * this will only be visible on the 79448006Skato * next open. 79548006Skato * 79648006Skato * If interrupt status changes, 79748006Skato * this gets syslog'd. 79848006Skato */ 79948006Skato old_sc_irq = sc->sc_irq; 80048006Skato if(*(int*)data == 0) 80148006Skato sc->sc_irq &= (~LP_ENABLE_IRQ); 80248006Skato else 80348006Skato sc->sc_irq |= LP_ENABLE_IRQ; 80448006Skato if (old_sc_irq != sc->sc_irq ) 80548006Skato log(LOG_NOTICE, "lpt%c switched to %s mode\n", 80648006Skato (char)unit+'0', 80748006Skato (sc->sc_irq & LP_ENABLE_IRQ)? 80848006Skato "interrupt-driven":"polled"); 80948006Skato } else /* polled port */ 81048006Skato error = EOPNOTSUPP; 81148006Skato break; 81248006Skato default: 81348006Skato error = ENODEV; 81448006Skato } 81548006Skato 81648006Skato return(error); 81748006Skato} 818