1139825Simp/*- 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 * $FreeBSD$ 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> 109130174Sphk#include <sys/module.h> 11048006Skato#include <sys/uio.h> 11148006Skato#include <sys/syslog.h> 112116431Sphk#include <sys/malloc.h> 11348006Skato 11480537Snyan#include <machine/bus.h> 11580537Snyan#include <machine/resource.h> 11680537Snyan#include <sys/rman.h> 11780537Snyan 11880537Snyan#include <isa/isavar.h> 11980537Snyan 120146051Snyan#include <pc98/cbus/olptreg.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 DEBUG 13048006Skato#define lprintf(args) 13148006Skato#else 13248006Skato#define lprintf(args) do { \ 13348006Skato if (lptflag) \ 13448006Skato printf args; \ 13548006Skato } while (0) 13648006Skatostatic int volatile lptflag = 1; 13748006Skato#endif 13848006Skato 13980537Snyanstruct lpt_softc { 14080537Snyan struct resource *res_port; 14180537Snyan struct resource *res_irq; 14280537Snyan void *sc_ih; 143272124Sjhb struct callout timer; 14480537Snyan 14548006Skato int sc_port; 14648006Skato short sc_state; 14748006Skato /* default case: negative prime, negative ack, handshake strobe, 14848006Skato prime once */ 14948006Skato u_char sc_control; 15048006Skato char sc_flags; 15148006Skato#define LP_POS_INIT 0x04 /* if we are a postive init signal */ 15248006Skato#define LP_POS_ACK 0x08 /* if we are a positive going ack */ 15348006Skato#define LP_NO_PRIME 0x10 /* don't prime the printer at all */ 15448006Skato#define LP_PRIMEOPEN 0x20 /* prime on every open */ 15548006Skato#define LP_AUTOLF 0x40 /* tell printer to do an automatic lf */ 15648006Skato#define LP_BYPASS 0x80 /* bypass printer ready checks */ 157116431Sphk void *sc_inbuf; 15848006Skato short sc_xfercnt ; 15948006Skato char sc_primed; 16048006Skato char *sc_cp ; 16148006Skato u_char sc_irq ; /* IRQ status of port */ 16248006Skato#define LP_HAS_IRQ 0x01 /* we have an irq available */ 16348006Skato#define LP_USE_IRQ 0x02 /* we are using our irq */ 16448006Skato#define LP_ENABLE_IRQ 0x04 /* enable IRQ on open */ 16548006Skato u_char sc_backoff ; /* time to call lptout() again */ 16680537Snyan}; 16748006Skato 16848006Skato/* bits for state */ 16948006Skato#define OPEN (1<<0) /* device is open */ 17048006Skato#define ASLP (1<<1) /* awaiting draining of printer */ 17148006Skato#define ERROR (1<<2) /* error was received from printer */ 17248006Skato#define OBUSY (1<<3) /* printer is busy doing output */ 17348006Skato#define LPTOUT (1<<4) /* timeout while not selected */ 17448006Skato#define TOUT (1<<5) /* timeout while not selected */ 17548006Skato#define INIT (1<<6) /* waiting to initialize for open */ 17648006Skato#define INTERRUPTED (1<<7) /* write call was interrupted */ 17748006Skato 17848006Skato 17948006Skato/* status masks to interrogate printer status */ 18048006Skato#define RDY_MASK (LPS_SEL|LPS_OUT|LPS_NBSY|LPS_NERR) /* ready ? */ 18148006Skato#define LP_READY (LPS_SEL|LPS_NBSY|LPS_NERR) 18248006Skato 18348006Skato/* Printer Ready condition - from lpa.c */ 18448006Skato/* Only used in polling code */ 18548006Skato#define NOT_READY(x) ((inb(x) & LPS_NBSY) != LPS_NBSY) 18648006Skato 18748006Skato#define MAX_SLEEP (hz*5) /* Timeout while waiting for device ready */ 18848006Skato#define MAX_SPIN 20 /* Max delay for device ready in usecs */ 18948006Skato 19048006Skatostatic timeout_t lptout; 19180537Snyanstatic int lpt_probe(device_t); 19280537Snyanstatic int lpt_attach(device_t); 19380537Snyanstatic void lpt_intr(void *); 19448006Skato 19580537Snyanstatic devclass_t olpt_devclass; 19680537Snyan 19780537Snyanstatic device_method_t olpt_methods[] = { 19880537Snyan DEVMETHOD(device_probe, lpt_probe), 19980537Snyan DEVMETHOD(device_attach, lpt_attach), 20080537Snyan { 0, 0 } 20148006Skato}; 20248006Skato 20380537Snyanstatic driver_t olpt_driver = { 20480537Snyan "olpt", 20580537Snyan olpt_methods, 20680537Snyan sizeof (struct lpt_softc), 20780537Snyan}; 20880537Snyan 20980537SnyanDRIVER_MODULE(olpt, isa, olpt_driver, olpt_devclass, 0, 0); 21080537Snyan 21148006Skatostatic d_open_t lptopen; 21248006Skatostatic d_close_t lptclose; 21348006Skatostatic d_write_t lptwrite; 21448006Skatostatic d_ioctl_t lptioctl; 21548006Skato 21648006Skatostatic struct cdevsw lpt_cdevsw = { 217126080Sphk .d_version = D_VERSION, 218126080Sphk .d_flags = D_NEEDGIANT, 219111815Sphk .d_open = lptopen, 220111815Sphk .d_close = lptclose, 221111815Sphk .d_write = lptwrite, 222111815Sphk .d_ioctl = lptioctl, 223111815Sphk .d_name = "lpt", 22448006Skato}; 22548006Skato 22680537Snyanstatic bus_addr_t lpt_iat[] = {0, 2, 4, 6}; 22780537Snyan 22848006Skato/* 22948006Skato * New lpt port probe Geoff Rehmet - Rhodes University - 14/2/94 23048006Skato * Based partially on Rod Grimes' printer probe 23148006Skato * 23248006Skato * Logic: 23348006Skato * 1) If no port address was given, use the bios detected ports 23448006Skato * and autodetect what ports the printers are on. 23548006Skato * 2) Otherwise, probe the data port at the address given, 23648006Skato * using the method in Rod Grimes' port probe. 23748006Skato * (Much code ripped off directly from Rod's probe.) 23848006Skato * 23948006Skato * Comments from Rod's probe: 24048006Skato * Logic: 24148006Skato * 1) You should be able to write to and read back the same value 24248006Skato * to the data port. Do an alternating zeros, alternating ones, 24348006Skato * walking zero, and walking one test to check for stuck bits. 24448006Skato * 24548006Skato * 2) You should be able to write to and read back the same value 24648006Skato * to the control port lower 5 bits, the upper 3 bits are reserved 24748006Skato * per the IBM PC technical reference manauls and different boards 24848006Skato * do different things with them. Do an alternating zeros, alternating 24948006Skato * ones, walking zero, and walking one test to check for stuck bits. 25048006Skato * 25148006Skato * Some printers drag the strobe line down when the are powered off 25248006Skato * so this bit has been masked out of the control port test. 25348006Skato * 25448006Skato * XXX Some printers may not like a fast pulse on init or strobe, I 25548006Skato * don't know at this point, if that becomes a problem these bits 25648006Skato * should be turned off in the mask byte for the control port test. 25748006Skato * 25848006Skato * We are finally left with a mask of 0x14, due to some printers 25948006Skato * being adamant about holding other bits high ........ 26048006Skato * 26148006Skato * Before probing the control port, we write a 0 to the data port - 26248006Skato * If not, some printers chuck out garbage when the strobe line 26348006Skato * gets toggled. 26448006Skato * 26548006Skato * 3) Set the data and control ports to a value of 0 26648006Skato * 26748006Skato * This probe routine has been tested on Epson Lx-800, HP LJ3P, 26848006Skato * Epson FX-1170 and C.Itoh 8510RM 26948006Skato * printers. 27048006Skato * Quick exit on fail added. 27148006Skato */ 27248006Skato 27348006Skatoint 27480537Snyanlpt_probe(device_t dev) 27548006Skato{ 27648006Skato#define PC98_OLD_LPT 0x40 27748006Skato#define PC98_IEEE_1284_FUNCTION 0x149 27880537Snyan int rid; 27980537Snyan struct resource *res; 28048006Skato 28180537Snyan /* Check isapnp ids */ 28280537Snyan if (isa_get_vendorid(dev)) 28380537Snyan return ENXIO; 28480537Snyan 28580537Snyan rid = 0; 28680537Snyan res = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid, lpt_iat, 4, 28780537Snyan RF_ACTIVE); 28880537Snyan if (res == NULL) 28980537Snyan return ENXIO; 29080537Snyan isa_load_resourcev(res, lpt_iat, 4); 29180537Snyan 29280537Snyan if (isa_get_port(dev) == PC98_OLD_LPT) { 29380537Snyan unsigned int pc98_ieee_mode, tmp; 29480537Snyan 29548006Skato tmp = inb(PC98_IEEE_1284_FUNCTION); 29648006Skato pc98_ieee_mode = tmp; 29748006Skato if ((tmp & 0x10) == 0x10) { 29848006Skato outb(PC98_IEEE_1284_FUNCTION, tmp & ~0x10); 29948006Skato tmp = inb(PC98_IEEE_1284_FUNCTION); 30048006Skato if ((tmp & 0x10) != 0x10) { 30148006Skato outb(PC98_IEEE_1284_FUNCTION, pc98_ieee_mode); 30280537Snyan bus_release_resource(dev, SYS_RES_IOPORT, rid, 30380537Snyan res); 30480537Snyan return ENXIO; 30548006Skato } 30648006Skato } 30748006Skato } 30880537Snyan 30980537Snyan bus_release_resource(dev, SYS_RES_IOPORT, rid, res); 31080537Snyan return 0; 31148006Skato} 31248006Skato 31348006Skato/* XXX Todo - try and detect if interrupt is working */ 31448006Skatoint 31580537Snyanlpt_attach(device_t dev) 31648006Skato{ 31780537Snyan int rid, unit; 31848006Skato struct lpt_softc *sc; 319191114Sed struct cdev *cdev; 32048006Skato 32180537Snyan unit = device_get_unit(dev); 32280537Snyan sc = device_get_softc(dev); 323272124Sjhb callout_init(&sc->timer, 0); 32480537Snyan 32580537Snyan rid = 0; 32680537Snyan sc->res_port = isa_alloc_resourcev(dev, SYS_RES_IOPORT, &rid, 32780537Snyan lpt_iat, 4, RF_ACTIVE); 32880537Snyan if (sc->res_port == NULL) 32980537Snyan return ENXIO; 33080537Snyan isa_load_resourcev(sc->res_port, lpt_iat, 4); 33180537Snyan 33280537Snyan sc->sc_port = rman_get_start(sc->res_port); 33348006Skato sc->sc_primed = 0; /* not primed yet */ 334145012Snyan 33548006Skato outb(sc->sc_port+lpt_pstb_ctrl, LPC_DIS_PSTB); /* PSTB disable */ 33648006Skato outb(sc->sc_port+lpt_control, LPC_MODE8255); /* 8255 mode set */ 33748006Skato outb(sc->sc_port+lpt_control, LPC_NIRQ8); /* IRQ8 inactive */ 33848006Skato outb(sc->sc_port+lpt_control, LPC_NPSTB); /* PSTB inactive */ 33948006Skato outb(sc->sc_port+lpt_pstb_ctrl, LPC_EN_PSTB); /* PSTB enable */ 34048006Skato 34180537Snyan sc->sc_irq = 0; 34280537Snyan if (isa_get_irq(dev) != -1) { 34380537Snyan rid = 0; 344127135Snjl sc->res_irq = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid, 345127135Snjl RF_ACTIVE); 34680537Snyan if (sc->res_irq == NULL) { 34780537Snyan bus_release_resource(dev, SYS_RES_IOPORT, 0, 34880537Snyan sc->res_port); 34980537Snyan return ENXIO; 35080537Snyan } 351166923Spiso if (bus_setup_intr(dev, sc->res_irq, INTR_TYPE_TTY, NULL, lpt_intr, 35280537Snyan sc, &sc->sc_ih)) { 35380537Snyan bus_release_resource(dev, SYS_RES_IOPORT, 0, 35480537Snyan sc->res_port); 35580537Snyan bus_release_resource(dev, SYS_RES_IRQ, 0, 35680537Snyan sc->res_irq); 35780537Snyan return ENXIO; 35880537Snyan } 35948006Skato sc->sc_irq = LP_HAS_IRQ | LP_USE_IRQ | LP_ENABLE_IRQ; 36080537Snyan device_printf(dev, "Interrupt-driven port"); 36148006Skato } 36248006Skato 363191114Sed cdev = make_dev(&lpt_cdevsw, 0, 364191114Sed UID_ROOT, GID_WHEEL, 0600, "lpt%d", unit); 365191114Sed cdev->si_drv1 = sc; 366191114Sed cdev = make_dev(&lpt_cdevsw, LP_BYPASS, 36750436Sjulian UID_ROOT, GID_WHEEL, 0600, "lpctl%d", unit); 368191114Sed cdev->si_drv1 = sc; 36958142Snyan 37080537Snyan return 0; 37148006Skato} 37248006Skato 37348006Skato/* 37448006Skato * lptopen -- reset the printer, then wait until it's selected and not busy. 37548006Skato * If LP_BYPASS flag is selected, then we do not try to select the 37648006Skato * printer -- this is just used for passing ioctls. 37748006Skato */ 37848006Skato 37948006Skatostatic int 380130585Sphklptopen (struct cdev *dev, int flags, int fmt, struct thread *td) 38148006Skato{ 382191114Sed struct lpt_softc *sc = dev->si_drv1; 38348006Skato int s; 38448006Skato int port; 38548006Skato 38680537Snyan if (sc->sc_port == 0) 38748006Skato return (ENXIO); 38848006Skato 38948006Skato if (sc->sc_state) { 39048006Skato lprintf(("lp: still open %x\n", sc->sc_state)); 39148006Skato return(EBUSY); 39248006Skato } else 39348006Skato sc->sc_state |= INIT; 39448006Skato 395191114Sed sc->sc_flags = dev2unit(dev); 39648006Skato 39748006Skato /* Check for open with BYPASS flag set. */ 39848006Skato if (sc->sc_flags & LP_BYPASS) { 39948006Skato sc->sc_state = OPEN; 40048006Skato return(0); 40148006Skato } 40248006Skato 40348006Skato s = spltty(); 40448006Skato lprintf(("lp flags 0x%x\n", sc->sc_flags)); 40548006Skato port = sc->sc_port; 40648006Skato 40748006Skato /* set IRQ status according to ENABLE_IRQ flag */ 40848006Skato if (sc->sc_irq & LP_ENABLE_IRQ) 40948006Skato sc->sc_irq |= LP_USE_IRQ; 41048006Skato else 41148006Skato sc->sc_irq &= ~LP_USE_IRQ; 41248006Skato 41348006Skato /* init printer */ 41448006Skato sc->sc_state = OPEN; 415116431Sphk sc->sc_inbuf = malloc(BUFSIZE, M_DEVBUF, M_WAITOK); 41648006Skato sc->sc_xfercnt = 0; 41748006Skato splx(s); 41848006Skato 41948006Skato /* only use timeout if using interrupt */ 42048006Skato lprintf(("irq %x\n", sc->sc_irq)); 42148006Skato if (sc->sc_irq & LP_USE_IRQ) { 42248006Skato sc->sc_state |= TOUT; 423297793Spfg sc->sc_backoff = hz / LPTOUTINITIAL; 424272124Sjhb callout_reset(&sc->timer, sc->sc_backoff, lptout, sc); 42548006Skato } 42648006Skato 42748006Skato lprintf(("opened.\n")); 42848006Skato return(0); 42948006Skato} 43048006Skato 43148006Skatostatic void 43248006Skatolptout (void *arg) 43348006Skato{ 43448006Skato struct lpt_softc *sc = arg; 43548006Skato int pl; 43648006Skato 43748006Skato lprintf(("T %x ", inb(sc->sc_port+lpt_status))); 43848006Skato if (sc->sc_state & OPEN) { 43948006Skato sc->sc_backoff++; 44048006Skato if (sc->sc_backoff > hz/LPTOUTMAX) 44148006Skato sc->sc_backoff = sc->sc_backoff > hz/LPTOUTMAX; 442272124Sjhb callout_reset(&sc->timer, sc->sc_backoff, lptout, sc); 44348006Skato } else 44448006Skato sc->sc_state &= ~TOUT; 44548006Skato 44648006Skato if (sc->sc_state & ERROR) 44748006Skato sc->sc_state &= ~ERROR; 44848006Skato 44948006Skato /* 45048006Skato * Avoid possible hangs do to missed interrupts 45148006Skato */ 45248006Skato if (sc->sc_xfercnt) { 45348006Skato pl = spltty(); 45480537Snyan lpt_intr(sc); 45548006Skato splx(pl); 45648006Skato } else { 45748006Skato sc->sc_state &= ~OBUSY; 458111748Sdes wakeup(sc); 45948006Skato } 46048006Skato} 46148006Skato 46248006Skato/* 46348006Skato * lptclose -- close the device, free the local line buffer. 46448006Skato * 46548006Skato * Check for interrupted write call added. 46648006Skato */ 46748006Skato 46848006Skatostatic int 469130585Sphklptclose(struct cdev *dev, int flags, int fmt, struct thread *td) 47048006Skato{ 471191114Sed struct lpt_softc *sc = dev->si_drv1; 47248006Skato 47348006Skato if(sc->sc_flags & LP_BYPASS) 47448006Skato goto end_close; 47548006Skato 47648006Skato sc->sc_state &= ~OPEN; 477116431Sphk free(sc->sc_inbuf, M_DEVBUF); 47848006Skato 47948006Skatoend_close: 48048006Skato sc->sc_state = 0; 48148006Skato sc->sc_xfercnt = 0; 48248006Skato lprintf(("closed.\n")); 48348006Skato return(0); 48448006Skato} 48548006Skato 48648006Skato/* 48748006Skato * pushbytes() 48848006Skato * Workhorse for actually spinning and writing bytes to printer 48948006Skato * Derived from lpa.c 49048006Skato * Originally by ? 49148006Skato * 49248006Skato * This code is only used when we are polling the port 49348006Skato */ 49448006Skatostatic int 49548006Skatopushbytes(struct lpt_softc * sc) 49648006Skato{ 49748006Skato int spin, err, tic; 49848006Skato char ch; 49948006Skato int port = sc->sc_port; 50048006Skato 50148006Skato lprintf(("p")); 50248006Skato /* loop for every character .. */ 50348006Skato while (sc->sc_xfercnt > 0) { 50448006Skato /* printer data */ 50548006Skato ch = *(sc->sc_cp); 50648006Skato sc->sc_cp++; 50748006Skato sc->sc_xfercnt--; 50848006Skato 50948006Skato /* 51048006Skato * Wait for printer ready. 51148006Skato * Loop 20 usecs testing BUSY bit, then sleep 51248006Skato * for exponentially increasing timeout. (vak) 51348006Skato */ 51448006Skato for (spin=0; NOT_READY(port+lpt_status) && spin<MAX_SPIN; ++spin) 51548006Skato DELAY(1); /* XXX delay is NOT this accurate! */ 51648006Skato if (spin >= MAX_SPIN) { 51748006Skato tic = 0; 51848006Skato while (NOT_READY(port+lpt_status)) { 51948006Skato /* 52048006Skato * Now sleep, every cycle a 52148006Skato * little longer .. 52248006Skato */ 52348006Skato tic = tic + tic + 1; 52448006Skato /* 52548006Skato * But no more than 10 seconds. (vak) 52648006Skato */ 52748006Skato if (tic > MAX_SLEEP) 52848006Skato tic = MAX_SLEEP; 529111748Sdes err = tsleep(sc, LPPRI, 53048006Skato "lptpoll", tic); 53148006Skato if (err != EWOULDBLOCK) { 53248006Skato return (err); 53348006Skato } 53448006Skato } 53548006Skato } 53648006Skato 53748006Skato /* output data */ 53848006Skato outb(port+lpt_data, ch); 53948006Skato DELAY(1); 54048006Skato outb(port+lpt_control, LPC_PSTB); 54148006Skato DELAY(1); 54248006Skato outb(port+lpt_control, LPC_NPSTB); 54348006Skato } 54448006Skato return(0); 54548006Skato} 54648006Skato 54748006Skato/* 54848006Skato * lptwrite --copy a line from user space to a local buffer, then call 54948006Skato * putc to get the chars moved to the output queue. 55048006Skato * 55148006Skato * Flagging of interrupted write added. 55248006Skato */ 55348006Skato 55448006Skatostatic int 555130585Sphklptwrite(struct cdev *dev, struct uio * uio, int ioflag) 55648006Skato{ 55748006Skato register unsigned n; 55848006Skato int pl, err; 559191114Sed struct lpt_softc *sc = dev->si_drv1; 56048006Skato 56148006Skato if(sc->sc_flags & LP_BYPASS) { 56248006Skato /* we can't do writes in bypass mode */ 56348006Skato return(EPERM); 56448006Skato } 56548006Skato 56648006Skato sc->sc_state &= ~INTERRUPTED; 56748006Skato while ((n = min(BUFSIZE, uio->uio_resid)) != 0) { 568116431Sphk sc->sc_cp = sc->sc_inbuf; 56948006Skato uiomove(sc->sc_cp, n, uio); 57048006Skato sc->sc_xfercnt = n ; 57148006Skato while ((sc->sc_xfercnt > 0)&&(sc->sc_irq & LP_USE_IRQ)) { 57248006Skato lprintf(("i")); 57348006Skato /* if the printer is ready for a char, */ 57448006Skato /* give it one */ 57548006Skato if ((sc->sc_state & OBUSY) == 0){ 57648006Skato lprintf(("\nC %d. ", sc->sc_xfercnt)); 57748006Skato pl = spltty(); 57880537Snyan lpt_intr(sc); 57948006Skato (void) splx(pl); 58048006Skato } 58148006Skato lprintf(("W ")); 58248006Skato if (sc->sc_state & OBUSY) 583111748Sdes if ((err = tsleep (sc, 58448006Skato LPPRI|PCATCH, "lpwrite", 0))) { 58548006Skato sc->sc_state |= INTERRUPTED; 58648006Skato return(err); 58748006Skato } 58848006Skato } 58948006Skato /* check to see if we must do a polled write */ 59048006Skato if(!(sc->sc_irq & LP_USE_IRQ) && (sc->sc_xfercnt)) { 59148006Skato lprintf(("p")); 59248006Skato if((err = pushbytes(sc))) 59348006Skato return(err); 59448006Skato } 59548006Skato } 59648006Skato return(0); 59748006Skato} 59848006Skato 59948006Skato/* 60048006Skato * lptintr -- handle printer interrupts which occur when the printer is 60148006Skato * ready to accept another char. 60248006Skato * 60348006Skato * do checking for interrupted write call. 60448006Skato */ 60548006Skato 60648006Skatostatic void 60780537Snyanlpt_intr(void *arg) 60848006Skato{ 60948006Skato} 61048006Skato 61148006Skatostatic int 612130585Sphklptioctl(struct cdev *dev, u_long cmd, caddr_t data, int flags, struct thread *td) 61348006Skato{ 61448006Skato int error = 0; 615191114Sed struct lpt_softc *sc = dev->si_drv1; 61648006Skato u_char old_sc_irq; /* old printer IRQ status */ 61748006Skato 61848006Skato switch (cmd) { 61948006Skato case LPT_IRQ : 62048006Skato if(sc->sc_irq & LP_HAS_IRQ) { 62148006Skato /* 62248006Skato * NOTE: 62348006Skato * If the IRQ status is changed, 62448006Skato * this will only be visible on the 62548006Skato * next open. 62648006Skato * 62748006Skato * If interrupt status changes, 62848006Skato * this gets syslog'd. 62948006Skato */ 63048006Skato old_sc_irq = sc->sc_irq; 63148006Skato if(*(int*)data == 0) 63248006Skato sc->sc_irq &= (~LP_ENABLE_IRQ); 63348006Skato else 63448006Skato sc->sc_irq |= LP_ENABLE_IRQ; 63548006Skato if (old_sc_irq != sc->sc_irq ) 636191114Sed log(LOG_NOTICE, "%s switched to %s mode\n", 637191114Sed devtoname(dev), 63848006Skato (sc->sc_irq & LP_ENABLE_IRQ)? 63948006Skato "interrupt-driven":"polled"); 64048006Skato } else /* polled port */ 64148006Skato error = EOPNOTSUPP; 64248006Skato break; 64348006Skato default: 64448006Skato error = ENODEV; 64548006Skato } 64648006Skato 64748006Skato return(error); 64848006Skato} 649