spic.c revision 93071
169873Snsayer/* 269873Snsayer * Copyright (c) 2000 Nick Sayer 369873Snsayer * All rights reserved. 469873Snsayer * 569873Snsayer * Redistribution and use in source and binary forms, with or without 669873Snsayer * modification, are permitted provided that the following conditions 769873Snsayer * are met: 869873Snsayer * 1. Redistributions of source code must retain the above copyright 969873Snsayer * notice, this list of conditions and the following disclaimer. 1069873Snsayer * 2. Redistributions in binary form must reproduce the above copyright 1169873Snsayer * notice, this list of conditions and the following disclaimer in the 1269873Snsayer * documentation and/or other materials provided with the distribution. 1369873Snsayer * 1469873Snsayer * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1569873Snsayer * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1669873Snsayer * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1769873Snsayer * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1869873Snsayer * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1969873Snsayer * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2069873Snsayer * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2169873Snsayer * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2269873Snsayer * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2369873Snsayer * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2469873Snsayer * SUCH DAMAGE. 2569873Snsayer * 2669873Snsayer * spic -- the Sony Programmable I/O Controller 2769873Snsayer * 2869873Snsayer * This device exists on most recent Sony laptops. It is the means by which 2969873Snsayer * you can watch the Jog Dial and some other functions. 3069873Snsayer * 3169873Snsayer * At the moment, this driver merely tries to turn the jog dial into a 3269873Snsayer * device that moused can park on, with the intent of supplying a Z axis 3369873Snsayer * and mouse button out of the jog dial. I suspect that this device will 3469873Snsayer * end up having to support at least 2 different minor devices: One to be 3569873Snsayer * the jog wheel device for moused to camp out on and the other to perform 3669873Snsayer * all of the other miscelaneous functions of this device. But for now, 3769873Snsayer * the jog wheel is all you get. 3869873Snsayer * 3969873Snsayer * At the moment, the data sent back by the device is rather primitive. 4069873Snsayer * It sends a single character per event: 4169873Snsayer * u = up, d = down -- that's the jog button 4269873Snsayer * l = left, r = right -- that's the dial. 4369873Snsayer * "left" and "right" are rather caprecious. They actually represent 4469873Snsayer * ccw and cw, respectively 4569873Snsayer * 4669873Snsayer * What documentation exists is thanks to Andrew Tridge, and his page at 4769873Snsayer * http://samba.org/picturebook/ Special thanks also to Ian Dowse, who 4869873Snsayer * also provided sample code upon which this driver was based. 4969873Snsayer * 5069873Snsayer * $FreeBSD: head/sys/i386/isa/spic.c 93071 2002-03-24 03:07:07Z will $ 5169873Snsayer */ 5269873Snsayer 5369873Snsayer#include <sys/param.h> 5469873Snsayer#include <sys/systm.h> 5569873Snsayer#include <sys/kernel.h> 5669873Snsayer#include <sys/bus.h> 5769873Snsayer#include <machine/bus.h> 5869873Snsayer#include <sys/rman.h> 5969873Snsayer#include <machine/resource.h> 6069873Snsayer#include <isa/isavar.h> 6169873Snsayer#include <sys/poll.h> 6269873Snsayer#include <machine/pci_cfgreg.h> 6369873Snsayer#include <machine/clock.h> 6469873Snsayer#include <sys/tty.h> 6569873Snsayer#include <sys/conf.h> 6669873Snsayer#include <sys/fcntl.h> 6769873Snsayer#include <sys/dkstat.h> 6869873Snsayer#include <sys/malloc.h> 6969873Snsayer#include <sys/sysctl.h> 7069873Snsayer#include <sys/uio.h> 7169873Snsayer 7269873Snsayer#include <i386/isa/spicreg.h> 7369873Snsayer 7469873Snsayerstatic int spic_pollrate; 7569873Snsayer 7669873SnsayerSYSCTL_INT(_machdep, OID_AUTO, spic_pollrate, CTLFLAG_RW, &spic_pollrate, 0, "") 7769873Snsayer; 7869873Snsayer 7969873Snsayerdevclass_t spic_devclass; 8069873Snsayer 8169873Snsayerstatic d_open_t spicopen; 8269873Snsayerstatic d_close_t spicclose; 8369873Snsayerstatic d_read_t spicread; 8469873Snsayerstatic d_ioctl_t spicioctl; 8569873Snsayerstatic d_poll_t spicpoll; 8669873Snsayer 8769873Snsayerstatic struct cdevsw spic_cdevsw = { 8869873Snsayer /* open */ spicopen, 8969873Snsayer /* close */ spicclose, 9069873Snsayer /* read */ spicread, 9169873Snsayer /* write */ nowrite, 9269873Snsayer /* ioctl */ spicioctl, 9369873Snsayer /* poll */ spicpoll, 9469873Snsayer /* mmap */ nommap, 9569873Snsayer /* strategy */ nostrategy, 9669873Snsayer /* name */ "spic", 9769873Snsayer /* maj */ CDEV_MAJOR, 9869873Snsayer /* dump */ nodump, 9969873Snsayer /* psize */ nopsize, 10069873Snsayer /* flags */ 0, 10169873Snsayer}; 10269873Snsayer 10369873Snsayer#define SCBUFLEN 128 10469873Snsayer 10569873Snsayerstruct spic_softc { 10669873Snsayer u_short sc_port_addr; 10769873Snsayer u_char sc_intr; 10869873Snsayer struct resource *sc_port_res,*sc_intr_res; 10969873Snsayer int sc_port_rid,sc_intr_rid; 11069873Snsayer int sc_opened; 11169873Snsayer int sc_sleeping; 11269873Snsayer int sc_buttonlast; 11369873Snsayer struct callout_handle sc_timeout_ch; 11469873Snsayer device_t sc_dev; 11569873Snsayer struct selinfo sc_rsel; 11669873Snsayer u_char sc_buf[SCBUFLEN]; 11769873Snsayer int sc_count; 11893071Swill int sc_model; 11969873Snsayer}; 12069873Snsayer 12169873Snsayerstatic void 12269873Snsayerwrite_port1(struct spic_softc *sc, u_char val) 12369873Snsayer{ 12469873Snsayer DELAY(10); 12569873Snsayer outb(sc->sc_port_addr, val); 12669873Snsayer} 12769873Snsayer 12869873Snsayerstatic void 12969873Snsayerwrite_port2(struct spic_softc *sc, u_char val) 13069873Snsayer{ 13169873Snsayer DELAY(10); 13269873Snsayer outb(sc->sc_port_addr + 4, val); 13369873Snsayer} 13469873Snsayer 13569873Snsayerstatic u_char 13669873Snsayerread_port1(struct spic_softc *sc) 13769873Snsayer{ 13869873Snsayer DELAY(10); 13969873Snsayer return inb(sc->sc_port_addr); 14069873Snsayer} 14169873Snsayer 14269873Snsayerstatic u_char 14369873Snsayerread_port2(struct spic_softc *sc) 14469873Snsayer{ 14569873Snsayer DELAY(10); 14669873Snsayer return inb(sc->sc_port_addr + 4); 14769873Snsayer} 14869873Snsayer 14993071Swillstatic u_char 15093071Swillread_port_cst(struct spic_softc *sc) 15193071Swill{ 15293071Swill DELAY(10); 15393071Swill return inb(SPIC_CST_IOPORT); 15493071Swill} 15593071Swill 15669873Snsayerstatic void 15769873Snsayerbusy_wait(struct spic_softc *sc) 15869873Snsayer{ 15969873Snsayer int i=0; 16069873Snsayer 16169873Snsayer while(read_port2(sc) & 2) { 16269873Snsayer DELAY(10); 16369873Snsayer if (i++>10000) { 16469873Snsayer printf("spic busy wait abort\n"); 16569873Snsayer return; 16669873Snsayer } 16769873Snsayer } 16869873Snsayer} 16969873Snsayer 17093071Swillstatic void 17193071Swillbusy_wait_cst(struct spic_softc *sc, int mask) 17293071Swill{ 17393071Swill int i=0; 17493071Swill 17593071Swill while(read_port_cst(sc) & mask) { 17693071Swill DELAY(10); 17793071Swill if (i++>10000) { 17893071Swill printf("spic busy wait abort\n"); 17993071Swill return; 18093071Swill } 18193071Swill } 18293071Swill} 18393071Swill 18469873Snsayerstatic u_char 18569873Snsayerspic_call1(struct spic_softc *sc, u_char dev) { 18669873Snsayer busy_wait(sc); 18769873Snsayer write_port2(sc, dev); 18869873Snsayer read_port2(sc); 18969873Snsayer return read_port1(sc); 19069873Snsayer} 19169873Snsayer 19269873Snsayerstatic u_char 19369873Snsayerspic_call2(struct spic_softc *sc, u_char dev, u_char fn) 19469873Snsayer{ 19569873Snsayer busy_wait(sc); 19669873Snsayer write_port2(sc, dev); 19769873Snsayer busy_wait(sc); 19869873Snsayer write_port1(sc, fn); 19969873Snsayer return read_port1(sc); 20069873Snsayer} 20169873Snsayer 20293071Swillstatic void 20393071Swillspic_ecrset(struct spic_softc *sc, u_int16_t addr, u_int16_t value) 20493071Swill{ 20593071Swill busy_wait_cst(sc, 3); 20693071Swill outb(SPIC_CST_IOPORT, 0x81); 20793071Swill busy_wait_cst(sc, 2); 20893071Swill outb(SPIC_DATA_IOPORT, addr); 20993071Swill busy_wait_cst(sc, 2); 21093071Swill outb(SPIC_DATA_IOPORT, value); 21193071Swill busy_wait_cst(sc, 2); 21293071Swill} 21393071Swill 21493071Swillstatic void 21593071Swillspic_type2_srs(struct spic_softc *sc) 21693071Swill{ 21793071Swill spic_ecrset(sc, SPIC_SHIB, (sc->sc_port_addr & 0xFF00) >> 8); 21893071Swill spic_ecrset(sc, SPIC_SLOB, sc->sc_port_addr & 0x00FF); 21993071Swill spic_ecrset(sc, SPIC_SIRQ, 0x00); /* using polling mode (IRQ=0)*/ 22093071Swill DELAY(10); 22193071Swill} 22293071Swill 22369873Snsayerstatic int 22469873Snsayerspic_probe(device_t dev) 22569873Snsayer{ 22693071Swill struct spic_softc *sc; 22769873Snsayer u_char t, spic_irq; 22869873Snsayer 22993071Swill sc = device_get_softc(dev); 23069873Snsayer 23169873Snsayer /* 23269873Snsayer * We can only have 1 of these. Attempting to probe for a unit 1 23369873Snsayer * will destroy the work we did for unit 0 23469873Snsayer */ 23569873Snsayer if (device_get_unit(dev)) 23669873Snsayer return ENXIO; 23769873Snsayer 23869873Snsayer bzero(sc, sizeof(struct spic_softc)); 23969873Snsayer 24069873Snsayer if (!(sc->sc_port_res = bus_alloc_resource(dev, SYS_RES_IOPORT, 24169873Snsayer &sc->sc_port_rid, 0, ~0, 5, RF_ACTIVE))) { 24269873Snsayer device_printf(dev,"Couldn't map I/O\n"); 24369873Snsayer return ENXIO; 24469873Snsayer } 24569873Snsayer sc->sc_port_addr = (u_short)rman_get_start(sc->sc_port_res); 24669873Snsayer 24769873Snsayer#ifdef notyet 24869873Snsayer if (!(sc->sc_intr_res = bus_alloc_resource(dev, SYS_RES_IRQ, 24969873Snsayer &sc->sc_intr_rid, 0, ~0, 1, RF_ACTIVE))) { 25069873Snsayer device_printf(dev,"Couldn't map IRQ\n"); 25169873Snsayer bus_release_resource(dev, SYS_RES_IOPORT, 25269873Snsayer sc->sc_port_rid, sc->sc_port_res); 25369873Snsayer return ENXIO; 25469873Snsayer } 25569873Snsayer sc->sc_intr = (u_short)rman_get_start(sc->sc_intr_res); 25669873Snsayer 25769873Snsayer switch (sc->sc_intr) { 25869873Snsayer case 0: spic_irq = 3; break; 25969873Snsayer case 5: spic_irq = 0; break; 26069873Snsayer case 0xa: spic_irq = 1; break; 26169873Snsayer case 0xb: spic_irq = 2; break; 26269873Snsayer default: device_printf(dev,"Invalid IRQ\n"); 26369873Snsayer bus_release_resource(dev, SYS_RES_IOPORT, 26469873Snsayer sc->sc_port_rid, sc->sc_port_res); 26569873Snsayer bus_release_resource(dev, SYS_RES_IRQ, 26669873Snsayer sc->sc_intr_rid, sc->sc_intr_res); 26769873Snsayer return ENXIO; 26869873Snsayer } 26969873Snsayer#else 27069873Snsayer spic_irq = 3; 27169873Snsayer#endif 27269873Snsayer 27369873Snsayer#if 0 27469873Snsayer if (sc->sc_port_addr != 0x10A0) { 27569873Snsayer bus_release_resource(dev, SYS_RES_IOPORT, 27669873Snsayer sc->sc_port_rid, sc->sc_port_res); 27769873Snsayer bus_release_resource(dev, SYS_RES_IRQ, 27869873Snsayer sc->sc_intr_rid, sc->sc_intr_res); 27969873Snsayer return ENXIO; 28069873Snsayer } 28169873Snsayer#endif 28269873Snsayer 28369873Snsayer /* PIIX4 chipset at least? */ 28493071Swill if (pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, 0, 4) == 28593071Swill PIIX4_DEVID) { 28693071Swill sc->sc_model = SPIC_DEVICE_MODEL_TYPE1; 28793071Swill } else { 28893071Swill /* For newer VAIOs (R505, SRX7, ...) */ 28993071Swill sc->sc_model = SPIC_DEVICE_MODEL_TYPE2; 29093071Swill } 29169873Snsayer 29269873Snsayer /* 29369873Snsayer * This is an ugly hack. It is necessary until ACPI works correctly. 29469873Snsayer * 29569873Snsayer * The SPIC consists of 2 registers. They are mapped onto I/O by the 29669873Snsayer * PIIX4's General Device 10 function. There is also an interrupt 29769873Snsayer * control port at a somewhat magic location, but this first pass is 29869873Snsayer * polled. 29969873Snsayer * 30069873Snsayer * So the first thing we need to do is map the G10 space in. 30169873Snsayer * 30269873Snsayer */ 30369873Snsayer 30493071Swill /* Enable ACPI mode to get Fn key events */ 30593071Swill /* XXX This may slow down your VAIO if ACPI is not supported in the kernel. 30693071Swill outb(0xb2, 0xf0); 30793071Swill */ 30869873Snsayer 30993071Swill device_printf(dev,"device model type = %d\n", sc->sc_model); 31093071Swill 31193071Swill if(sc->sc_model == SPIC_DEVICE_MODEL_TYPE1) { 31293071Swill pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10A, 31393071Swill sc->sc_port_addr, 2); 31493071Swill t = pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, 1); 31593071Swill t &= 0xf0; 31693071Swill t |= 4; 31793071Swill pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, t, 1); 31893071Swill outw(SPIC_IRQ_PORT, (inw(SPIC_IRQ_PORT) & ~(0x3 << SPIC_IRQ_SHIFT)) | (spic_irq << SPIC_IRQ_SHIFT)); 31993071Swill t = pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, 1); 32093071Swill t &= 0x1f; 32193071Swill t |= 0xc0; 32293071Swill pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, t, 1); 32393071Swill } else { 32493071Swill spic_type2_srs(sc); 32593071Swill } 32693071Swill 32769873Snsayer /* 32869873Snsayer * XXX: Should try and see if there's anything actually there. 32969873Snsayer */ 33069873Snsayer 33169873Snsayer device_set_desc(dev, "Sony Programmable I/O Controller"); 33269873Snsayer 33369873Snsayer return 0; 33469873Snsayer} 33569873Snsayer 33669873Snsayerstatic int 33769873Snsayerspic_attach(device_t dev) 33869873Snsayer{ 33993071Swill struct spic_softc *sc; 34069873Snsayer 34193071Swill sc = device_get_softc(dev); 34269873Snsayer 34369873Snsayer sc->sc_dev = dev; 34469873Snsayer 34569873Snsayer spic_pollrate = (hz/50); /* Every 50th of a second */ 34669873Snsayer 34769873Snsayer spic_call1(sc, 0x82); 34869873Snsayer spic_call2(sc, 0x81, 0xff); 34969873Snsayer spic_call1(sc, 0x92); 35069873Snsayer 35193071Swill /* There can be only one */ 35293071Swill make_dev(&spic_cdevsw, 0, 0, 0, 0600, "jogdial"); 35369873Snsayer 35469873Snsayer return 0; 35569873Snsayer} 35669873Snsayer 35769873Snsayerstatic void 35869873Snsayerspictimeout(void *arg) 35969873Snsayer{ 36093071Swill struct spic_softc *sc = arg; 36169873Snsayer u_char b, event, param; 36269873Snsayer int j; 36369873Snsayer 36493071Swill if (!sc->sc_opened) { 36593071Swill device_printf(sc->sc_dev, "timeout called while closed!\n"); 36693071Swill return; 36793071Swill } 36869873Snsayer 36969873Snsayer event = read_port2(sc); 37069873Snsayer param = read_port1(sc); 37169873Snsayer 37269873Snsayer if ((event != 4) && (!(event & 0x1))) 37369873Snsayer switch(event) { 37493071Swill case 0x10: /* jog wheel event (type1) */ 37593071Swill if (sc->sc_model == SPIC_DEVICE_MODEL_TYPE1) { 37693071Swill b = !!(param & 0x40); 37793071Swill if (b != sc->sc_buttonlast) { 37893071Swill sc->sc_buttonlast = b; 37969873Snsayer sc->sc_buf[sc->sc_count++] = 38093071Swill b?'d':'u'; 38169873Snsayer } 38293071Swill j = (param & 0xf) | ((param & 0x10)? ~0xf:0); 38393071Swill if (j<0) 38493071Swill while(j++!=0) { 38593071Swill sc->sc_buf[sc->sc_count++] = 38693071Swill 'l'; 38793071Swill } 38893071Swill else if (j>0) 38993071Swill while(j--!=0) { 39093071Swill sc->sc_buf[sc->sc_count++] = 39193071Swill 'r'; 39293071Swill } 39393071Swill } 39493071Swill break; 39593071Swill case 0x08: /* jog wheel event (type2) */ 39693071Swill case 0x00: 39793071Swill /* SPIC_DEVICE_MODEL_TYPE2 returns jog wheel event=0x00 */ 39893071Swill if (sc->sc_model == SPIC_DEVICE_MODEL_TYPE2) { 39993071Swill b = !!(param & 0x40); 40093071Swill if (b != sc->sc_buttonlast) { 40193071Swill sc->sc_buttonlast = b; 40269873Snsayer sc->sc_buf[sc->sc_count++] = 40393071Swill b?'d':'u'; 40469873Snsayer } 40593071Swill j = (param & 0xf) | ((param & 0x10)? ~0xf:0); 40693071Swill if (j<0) 40793071Swill while(j++!=0) { 40893071Swill sc->sc_buf[sc->sc_count++] = 40993071Swill 'l'; 41093071Swill } 41193071Swill else if (j>0) 41293071Swill while(j--!=0) { 41393071Swill sc->sc_buf[sc->sc_count++] = 41493071Swill 'r'; 41593071Swill } 41693071Swill } 41769873Snsayer break; 41869873Snsayer case 0x60: /* Capture button */ 41969873Snsayer printf("Capture button event: %x\n",param); 42069873Snsayer break; 42169873Snsayer case 0x30: /* Lid switch */ 42269873Snsayer printf("Lid switch event: %x\n",param); 42369873Snsayer break; 42493071Swill case 0x0c: /* We must ignore these type of event for C1VP... */ 42593071Swill case 0x70: /* Closing/Opening the lid on C1VP */ 42693071Swill break; 42769873Snsayer default: 42893071Swill printf("Unknown event: event %02x param %02x\n", event, param); 42969873Snsayer break; 43069873Snsayer } 43169873Snsayer else { 43269873Snsayer /* No event. Wait some more */ 43393071Swill sc->sc_timeout_ch = timeout(spictimeout, sc, spic_pollrate); 43469873Snsayer return; 43569873Snsayer } 43669873Snsayer 43769873Snsayer if (sc->sc_count) { 43869873Snsayer if (sc->sc_sleeping) { 43969873Snsayer sc->sc_sleeping = 0; 44069873Snsayer wakeup((caddr_t) sc); 44169873Snsayer } 44269873Snsayer selwakeup(&sc->sc_rsel); 44369873Snsayer } 44469873Snsayer spic_call2(sc, 0x81, 0xff); /* Clear event */ 44569873Snsayer 44693071Swill sc->sc_timeout_ch = timeout(spictimeout, sc, spic_pollrate); 44769873Snsayer} 44869873Snsayer 44969873Snsayerstatic int 45083366Sjulianspicopen(dev_t dev, int flag, int fmt, struct thread *td) 45169873Snsayer{ 45293071Swill struct spic_softc *sc; 45369873Snsayer 45493071Swill sc = devclass_get_softc(spic_devclass, 0); 45569873Snsayer 45693071Swill if (sc->sc_opened) 45793071Swill return EBUSY; 45869873Snsayer 45969873Snsayer sc->sc_opened++; 46069873Snsayer sc->sc_count=0; 46169873Snsayer 46293071Swill /* Start the polling */ 46393071Swill timeout(spictimeout, sc, spic_pollrate); 46493071Swill return 0; 46569873Snsayer} 46669873Snsayer 46769873Snsayerstatic int 46883366Sjulianspicclose(dev_t dev, int flag, int fmt, struct thread *td) 46969873Snsayer{ 47093071Swill struct spic_softc *sc; 47169873Snsayer 47293071Swill sc = devclass_get_softc(spic_devclass, 0); 47369873Snsayer 47493071Swill /* Stop polling */ 47593071Swill untimeout(spictimeout, sc, sc->sc_timeout_ch); 47693071Swill sc->sc_opened = 0; 47793071Swill return 0; 47869873Snsayer} 47969873Snsayer 48069873Snsayerstatic int 48169873Snsayerspicread(dev_t dev, struct uio *uio, int flag) 48269873Snsayer{ 48393071Swill struct spic_softc *sc; 48469873Snsayer int l, s, error; 48569873Snsayer u_char buf[SCBUFLEN]; 48669873Snsayer 48793071Swill sc = devclass_get_softc(spic_devclass, 0); 48869873Snsayer 48969873Snsayer if (uio->uio_resid <= 0) /* What kind of a read is this?! */ 49069873Snsayer return 0; 49169873Snsayer 49269873Snsayer s = spltty(); 49369873Snsayer while (!(sc->sc_count)) { 49469873Snsayer sc->sc_sleeping=1; 49569873Snsayer error = tsleep((caddr_t) sc, PZERO | PCATCH, "jogrea", 0); 49669873Snsayer sc->sc_sleeping=0; 49769873Snsayer if (error) { 49869873Snsayer splx(s); 49969873Snsayer return error; 50069873Snsayer } 50169873Snsayer } 50269873Snsayer splx(s); 50369873Snsayer 50469873Snsayer s = spltty(); 50569873Snsayer l = min(uio->uio_resid, sc->sc_count); 50669873Snsayer bcopy(sc->sc_buf, buf, l); 50769873Snsayer sc->sc_count -= l; 50869873Snsayer bcopy(sc->sc_buf + l, sc->sc_buf, l); 50969873Snsayer splx(s); 51069873Snsayer return uiomove(buf, l, uio); 51169873Snsayer 51269873Snsayer} 51369873Snsayer 51469873Snsayerstatic int 51583366Sjulianspicioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 51669873Snsayer{ 51793071Swill struct spic_softc *sc; 51869873Snsayer 51993071Swill sc = devclass_get_softc(spic_devclass, 0); 52069873Snsayer 52169873Snsayer return EIO; 52269873Snsayer} 52369873Snsayer 52469873Snsayerstatic int 52583366Sjulianspicpoll(dev_t dev, int events, struct thread *td) 52669873Snsayer{ 52793071Swill struct spic_softc *sc; 52893071Swill int revents = 0, s; 52969873Snsayer 53093071Swill sc = devclass_get_softc(spic_devclass, 0); 53193071Swill s = spltty(); 53293071Swill if (events & (POLLIN | POLLRDNORM)) { 53393071Swill if (sc->sc_count) 53493071Swill revents |= events & (POLLIN | POLLRDNORM); 53593071Swill else 53693071Swill selrecord(td, &sc->sc_rsel); /* Who shall we wake? */ 53793071Swill } 53893071Swill splx(s); 53969873Snsayer 54093071Swill return revents; 54169873Snsayer} 54269873Snsayer 54369873Snsayer 54469873Snsayerstatic device_method_t spic_methods[] = { 54569873Snsayer DEVMETHOD(device_probe, spic_probe), 54669873Snsayer DEVMETHOD(device_attach, spic_attach), 54769873Snsayer 54869873Snsayer { 0, 0 } 54969873Snsayer}; 55069873Snsayer 55169873Snsayerstatic driver_t spic_driver = { 55269873Snsayer "spic", 55369873Snsayer spic_methods, 55469873Snsayer sizeof(struct spic_softc), 55569873Snsayer}; 55669873Snsayer 55769873SnsayerDRIVER_MODULE(spic, isa, spic_driver, spic_devclass, 0, 0); 55869873Snsayer 559