spic.c revision 126080
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 51115703Sobrien#include <sys/cdefs.h> 52115703Sobrien__FBSDID("$FreeBSD: head/sys/i386/isa/spic.c 126080 2004-02-21 21:10:55Z phk $"); 53115703Sobrien 5469873Snsayer#include <sys/param.h> 5569873Snsayer#include <sys/systm.h> 5669873Snsayer#include <sys/kernel.h> 5769873Snsayer#include <sys/bus.h> 5869873Snsayer#include <machine/bus.h> 5969873Snsayer#include <sys/rman.h> 6069873Snsayer#include <machine/resource.h> 6169873Snsayer#include <isa/isavar.h> 6269873Snsayer#include <sys/poll.h> 6369873Snsayer#include <machine/pci_cfgreg.h> 6469873Snsayer#include <machine/clock.h> 6569873Snsayer#include <sys/tty.h> 6669873Snsayer#include <sys/conf.h> 6769873Snsayer#include <sys/fcntl.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 = { 88126080Sphk .d_version = D_VERSION, 89126080Sphk .d_flags = D_NEEDGIANT, 90111815Sphk .d_open = spicopen, 91111815Sphk .d_close = spicclose, 92111815Sphk .d_read = spicread, 93111815Sphk .d_ioctl = spicioctl, 94111815Sphk .d_poll = spicpoll, 95111815Sphk .d_name = "spic", 9669873Snsayer}; 9769873Snsayer 9869873Snsayer#define SCBUFLEN 128 9969873Snsayer 10069873Snsayerstruct spic_softc { 101118509Sbde u_int sc_port_addr; 10269873Snsayer u_char sc_intr; 10369873Snsayer struct resource *sc_port_res,*sc_intr_res; 10469873Snsayer int sc_port_rid,sc_intr_rid; 10569873Snsayer int sc_opened; 10669873Snsayer int sc_sleeping; 10769873Snsayer int sc_buttonlast; 10869873Snsayer struct callout_handle sc_timeout_ch; 10969873Snsayer device_t sc_dev; 11069873Snsayer struct selinfo sc_rsel; 11169873Snsayer u_char sc_buf[SCBUFLEN]; 11269873Snsayer int sc_count; 11393071Swill int sc_model; 11469873Snsayer}; 11569873Snsayer 11669873Snsayerstatic void 11769873Snsayerwrite_port1(struct spic_softc *sc, u_char val) 11869873Snsayer{ 11969873Snsayer DELAY(10); 12069873Snsayer outb(sc->sc_port_addr, val); 12169873Snsayer} 12269873Snsayer 12369873Snsayerstatic void 12469873Snsayerwrite_port2(struct spic_softc *sc, u_char val) 12569873Snsayer{ 12669873Snsayer DELAY(10); 12769873Snsayer outb(sc->sc_port_addr + 4, val); 12869873Snsayer} 12969873Snsayer 13069873Snsayerstatic u_char 13169873Snsayerread_port1(struct spic_softc *sc) 13269873Snsayer{ 13369873Snsayer DELAY(10); 13469873Snsayer return inb(sc->sc_port_addr); 13569873Snsayer} 13669873Snsayer 13769873Snsayerstatic u_char 13869873Snsayerread_port2(struct spic_softc *sc) 13969873Snsayer{ 14069873Snsayer DELAY(10); 14169873Snsayer return inb(sc->sc_port_addr + 4); 14269873Snsayer} 14369873Snsayer 14493071Swillstatic u_char 14593071Swillread_port_cst(struct spic_softc *sc) 14693071Swill{ 14793071Swill DELAY(10); 14893071Swill return inb(SPIC_CST_IOPORT); 14993071Swill} 15093071Swill 15169873Snsayerstatic void 15269873Snsayerbusy_wait(struct spic_softc *sc) 15369873Snsayer{ 15469873Snsayer int i=0; 15569873Snsayer 15669873Snsayer while(read_port2(sc) & 2) { 15769873Snsayer DELAY(10); 15869873Snsayer if (i++>10000) { 15969873Snsayer printf("spic busy wait abort\n"); 16069873Snsayer return; 16169873Snsayer } 16269873Snsayer } 16369873Snsayer} 16469873Snsayer 16593071Swillstatic void 16693071Swillbusy_wait_cst(struct spic_softc *sc, int mask) 16793071Swill{ 16893071Swill int i=0; 16993071Swill 17093071Swill while(read_port_cst(sc) & mask) { 17193071Swill DELAY(10); 17293071Swill if (i++>10000) { 17393071Swill printf("spic busy wait abort\n"); 17493071Swill return; 17593071Swill } 17693071Swill } 17793071Swill} 17893071Swill 17969873Snsayerstatic u_char 18069873Snsayerspic_call1(struct spic_softc *sc, u_char dev) { 18169873Snsayer busy_wait(sc); 18269873Snsayer write_port2(sc, dev); 18369873Snsayer read_port2(sc); 18469873Snsayer return read_port1(sc); 18569873Snsayer} 18669873Snsayer 18769873Snsayerstatic u_char 18869873Snsayerspic_call2(struct spic_softc *sc, u_char dev, u_char fn) 18969873Snsayer{ 19069873Snsayer busy_wait(sc); 19169873Snsayer write_port2(sc, dev); 19269873Snsayer busy_wait(sc); 19369873Snsayer write_port1(sc, fn); 19469873Snsayer return read_port1(sc); 19569873Snsayer} 19669873Snsayer 19793071Swillstatic void 19893071Swillspic_ecrset(struct spic_softc *sc, u_int16_t addr, u_int16_t value) 19993071Swill{ 20093071Swill busy_wait_cst(sc, 3); 20193071Swill outb(SPIC_CST_IOPORT, 0x81); 20293071Swill busy_wait_cst(sc, 2); 20393071Swill outb(SPIC_DATA_IOPORT, addr); 20493071Swill busy_wait_cst(sc, 2); 20593071Swill outb(SPIC_DATA_IOPORT, value); 20693071Swill busy_wait_cst(sc, 2); 20793071Swill} 20893071Swill 20993071Swillstatic void 21093071Swillspic_type2_srs(struct spic_softc *sc) 21193071Swill{ 21293071Swill spic_ecrset(sc, SPIC_SHIB, (sc->sc_port_addr & 0xFF00) >> 8); 21393071Swill spic_ecrset(sc, SPIC_SLOB, sc->sc_port_addr & 0x00FF); 21493071Swill spic_ecrset(sc, SPIC_SIRQ, 0x00); /* using polling mode (IRQ=0)*/ 21593071Swill DELAY(10); 21693071Swill} 21793071Swill 21869873Snsayerstatic int 21969873Snsayerspic_probe(device_t dev) 22069873Snsayer{ 22193071Swill struct spic_softc *sc; 22269873Snsayer u_char t, spic_irq; 22369873Snsayer 22493071Swill sc = device_get_softc(dev); 22569873Snsayer 22669873Snsayer /* 22769873Snsayer * We can only have 1 of these. Attempting to probe for a unit 1 22869873Snsayer * will destroy the work we did for unit 0 22969873Snsayer */ 23069873Snsayer if (device_get_unit(dev)) 23169873Snsayer return ENXIO; 23269873Snsayer 23369873Snsayer bzero(sc, sizeof(struct spic_softc)); 23469873Snsayer 23569873Snsayer if (!(sc->sc_port_res = bus_alloc_resource(dev, SYS_RES_IOPORT, 23669873Snsayer &sc->sc_port_rid, 0, ~0, 5, RF_ACTIVE))) { 23769873Snsayer device_printf(dev,"Couldn't map I/O\n"); 23869873Snsayer return ENXIO; 23969873Snsayer } 24069873Snsayer sc->sc_port_addr = (u_short)rman_get_start(sc->sc_port_res); 24169873Snsayer 24269873Snsayer#ifdef notyet 24369873Snsayer if (!(sc->sc_intr_res = bus_alloc_resource(dev, SYS_RES_IRQ, 24469873Snsayer &sc->sc_intr_rid, 0, ~0, 1, RF_ACTIVE))) { 24569873Snsayer device_printf(dev,"Couldn't map IRQ\n"); 24669873Snsayer bus_release_resource(dev, SYS_RES_IOPORT, 24769873Snsayer sc->sc_port_rid, sc->sc_port_res); 24869873Snsayer return ENXIO; 24969873Snsayer } 25069873Snsayer sc->sc_intr = (u_short)rman_get_start(sc->sc_intr_res); 25169873Snsayer 25269873Snsayer switch (sc->sc_intr) { 25369873Snsayer case 0: spic_irq = 3; break; 25469873Snsayer case 5: spic_irq = 0; break; 25569873Snsayer case 0xa: spic_irq = 1; break; 25669873Snsayer case 0xb: spic_irq = 2; break; 25769873Snsayer default: device_printf(dev,"Invalid IRQ\n"); 25869873Snsayer bus_release_resource(dev, SYS_RES_IOPORT, 25969873Snsayer sc->sc_port_rid, sc->sc_port_res); 26069873Snsayer bus_release_resource(dev, SYS_RES_IRQ, 26169873Snsayer sc->sc_intr_rid, sc->sc_intr_res); 26269873Snsayer return ENXIO; 26369873Snsayer } 26469873Snsayer#else 26569873Snsayer spic_irq = 3; 26669873Snsayer#endif 26769873Snsayer 26869873Snsayer#if 0 26969873Snsayer if (sc->sc_port_addr != 0x10A0) { 27069873Snsayer bus_release_resource(dev, SYS_RES_IOPORT, 27169873Snsayer sc->sc_port_rid, sc->sc_port_res); 27269873Snsayer bus_release_resource(dev, SYS_RES_IRQ, 27369873Snsayer sc->sc_intr_rid, sc->sc_intr_res); 27469873Snsayer return ENXIO; 27569873Snsayer } 27669873Snsayer#endif 27769873Snsayer 27869873Snsayer /* PIIX4 chipset at least? */ 27993071Swill if (pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, 0, 4) == 28093071Swill PIIX4_DEVID) { 28193071Swill sc->sc_model = SPIC_DEVICE_MODEL_TYPE1; 28293071Swill } else { 28393071Swill /* For newer VAIOs (R505, SRX7, ...) */ 28493071Swill sc->sc_model = SPIC_DEVICE_MODEL_TYPE2; 28593071Swill } 28669873Snsayer 28769873Snsayer /* 28869873Snsayer * This is an ugly hack. It is necessary until ACPI works correctly. 28969873Snsayer * 29069873Snsayer * The SPIC consists of 2 registers. They are mapped onto I/O by the 29169873Snsayer * PIIX4's General Device 10 function. There is also an interrupt 29269873Snsayer * control port at a somewhat magic location, but this first pass is 29369873Snsayer * polled. 29469873Snsayer * 29569873Snsayer * So the first thing we need to do is map the G10 space in. 29669873Snsayer * 29769873Snsayer */ 29869873Snsayer 29993071Swill /* Enable ACPI mode to get Fn key events */ 30093071Swill /* XXX This may slow down your VAIO if ACPI is not supported in the kernel. 30193071Swill outb(0xb2, 0xf0); 30293071Swill */ 30369873Snsayer 30493071Swill device_printf(dev,"device model type = %d\n", sc->sc_model); 30593071Swill 30693071Swill if(sc->sc_model == SPIC_DEVICE_MODEL_TYPE1) { 30793071Swill pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10A, 30893071Swill sc->sc_port_addr, 2); 30993071Swill t = pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, 1); 31093071Swill t &= 0xf0; 31193071Swill t |= 4; 31293071Swill pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, t, 1); 31393071Swill outw(SPIC_IRQ_PORT, (inw(SPIC_IRQ_PORT) & ~(0x3 << SPIC_IRQ_SHIFT)) | (spic_irq << SPIC_IRQ_SHIFT)); 31493071Swill t = pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, 1); 31593071Swill t &= 0x1f; 31693071Swill t |= 0xc0; 31793071Swill pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, t, 1); 31893071Swill } else { 31993071Swill spic_type2_srs(sc); 32093071Swill } 32193071Swill 32269873Snsayer /* 32369873Snsayer * XXX: Should try and see if there's anything actually there. 32469873Snsayer */ 32569873Snsayer 32669873Snsayer device_set_desc(dev, "Sony Programmable I/O Controller"); 32769873Snsayer 32869873Snsayer return 0; 32969873Snsayer} 33069873Snsayer 33169873Snsayerstatic int 33269873Snsayerspic_attach(device_t dev) 33369873Snsayer{ 33493071Swill struct spic_softc *sc; 33569873Snsayer 33693071Swill sc = device_get_softc(dev); 33769873Snsayer 33869873Snsayer sc->sc_dev = dev; 33969873Snsayer 34069873Snsayer spic_pollrate = (hz/50); /* Every 50th of a second */ 34169873Snsayer 34269873Snsayer spic_call1(sc, 0x82); 34369873Snsayer spic_call2(sc, 0x81, 0xff); 34469873Snsayer spic_call1(sc, 0x92); 34569873Snsayer 34693071Swill /* There can be only one */ 34793071Swill make_dev(&spic_cdevsw, 0, 0, 0, 0600, "jogdial"); 34869873Snsayer 34969873Snsayer return 0; 35069873Snsayer} 35169873Snsayer 35269873Snsayerstatic void 35369873Snsayerspictimeout(void *arg) 35469873Snsayer{ 35593071Swill struct spic_softc *sc = arg; 35669873Snsayer u_char b, event, param; 35769873Snsayer int j; 35869873Snsayer 35993071Swill if (!sc->sc_opened) { 36093071Swill device_printf(sc->sc_dev, "timeout called while closed!\n"); 36193071Swill return; 36293071Swill } 36369873Snsayer 36469873Snsayer event = read_port2(sc); 36569873Snsayer param = read_port1(sc); 36669873Snsayer 36769873Snsayer if ((event != 4) && (!(event & 0x1))) 36869873Snsayer switch(event) { 36993071Swill case 0x10: /* jog wheel event (type1) */ 37093071Swill if (sc->sc_model == SPIC_DEVICE_MODEL_TYPE1) { 37193071Swill b = !!(param & 0x40); 37293071Swill if (b != sc->sc_buttonlast) { 37393071Swill sc->sc_buttonlast = b; 37469873Snsayer sc->sc_buf[sc->sc_count++] = 37593071Swill b?'d':'u'; 37669873Snsayer } 37793071Swill j = (param & 0xf) | ((param & 0x10)? ~0xf:0); 37893071Swill if (j<0) 37993071Swill while(j++!=0) { 38093071Swill sc->sc_buf[sc->sc_count++] = 38193071Swill 'l'; 38293071Swill } 38393071Swill else if (j>0) 38493071Swill while(j--!=0) { 38593071Swill sc->sc_buf[sc->sc_count++] = 38693071Swill 'r'; 38793071Swill } 38893071Swill } 38993071Swill break; 39093071Swill case 0x08: /* jog wheel event (type2) */ 39193071Swill case 0x00: 39293071Swill /* SPIC_DEVICE_MODEL_TYPE2 returns jog wheel event=0x00 */ 39393071Swill if (sc->sc_model == SPIC_DEVICE_MODEL_TYPE2) { 39493071Swill b = !!(param & 0x40); 39593071Swill if (b != sc->sc_buttonlast) { 39693071Swill sc->sc_buttonlast = b; 39769873Snsayer sc->sc_buf[sc->sc_count++] = 39893071Swill b?'d':'u'; 39969873Snsayer } 40093071Swill j = (param & 0xf) | ((param & 0x10)? ~0xf:0); 40193071Swill if (j<0) 40293071Swill while(j++!=0) { 40393071Swill sc->sc_buf[sc->sc_count++] = 40493071Swill 'l'; 40593071Swill } 40693071Swill else if (j>0) 40793071Swill while(j--!=0) { 40893071Swill sc->sc_buf[sc->sc_count++] = 40993071Swill 'r'; 41093071Swill } 41193071Swill } 41269873Snsayer break; 41369873Snsayer case 0x60: /* Capture button */ 41469873Snsayer printf("Capture button event: %x\n",param); 41569873Snsayer break; 41669873Snsayer case 0x30: /* Lid switch */ 41769873Snsayer printf("Lid switch event: %x\n",param); 41869873Snsayer break; 41993071Swill case 0x0c: /* We must ignore these type of event for C1VP... */ 42093071Swill case 0x70: /* Closing/Opening the lid on C1VP */ 42193071Swill break; 42269873Snsayer default: 42393071Swill printf("Unknown event: event %02x param %02x\n", event, param); 42469873Snsayer break; 42569873Snsayer } 42669873Snsayer else { 42769873Snsayer /* No event. Wait some more */ 42893071Swill sc->sc_timeout_ch = timeout(spictimeout, sc, spic_pollrate); 42969873Snsayer return; 43069873Snsayer } 43169873Snsayer 43269873Snsayer if (sc->sc_count) { 43369873Snsayer if (sc->sc_sleeping) { 43469873Snsayer sc->sc_sleeping = 0; 435111748Sdes wakeup( sc); 43669873Snsayer } 437122352Stanimura selwakeuppri(&sc->sc_rsel, PZERO); 43869873Snsayer } 43969873Snsayer spic_call2(sc, 0x81, 0xff); /* Clear event */ 44069873Snsayer 44193071Swill sc->sc_timeout_ch = timeout(spictimeout, sc, spic_pollrate); 44269873Snsayer} 44369873Snsayer 44469873Snsayerstatic int 44583366Sjulianspicopen(dev_t dev, int flag, int fmt, struct thread *td) 44669873Snsayer{ 44793071Swill struct spic_softc *sc; 44869873Snsayer 44993071Swill sc = devclass_get_softc(spic_devclass, 0); 45069873Snsayer 45193071Swill if (sc->sc_opened) 45293071Swill return EBUSY; 45369873Snsayer 45469873Snsayer sc->sc_opened++; 45569873Snsayer sc->sc_count=0; 45669873Snsayer 45793071Swill /* Start the polling */ 45893071Swill timeout(spictimeout, sc, spic_pollrate); 45993071Swill return 0; 46069873Snsayer} 46169873Snsayer 46269873Snsayerstatic int 46383366Sjulianspicclose(dev_t dev, int flag, int fmt, struct thread *td) 46469873Snsayer{ 46593071Swill struct spic_softc *sc; 46669873Snsayer 46793071Swill sc = devclass_get_softc(spic_devclass, 0); 46869873Snsayer 46993071Swill /* Stop polling */ 47093071Swill untimeout(spictimeout, sc, sc->sc_timeout_ch); 47193071Swill sc->sc_opened = 0; 47293071Swill return 0; 47369873Snsayer} 47469873Snsayer 47569873Snsayerstatic int 47669873Snsayerspicread(dev_t dev, struct uio *uio, int flag) 47769873Snsayer{ 47893071Swill struct spic_softc *sc; 47969873Snsayer int l, s, error; 48069873Snsayer u_char buf[SCBUFLEN]; 48169873Snsayer 48293071Swill sc = devclass_get_softc(spic_devclass, 0); 48369873Snsayer 48469873Snsayer if (uio->uio_resid <= 0) /* What kind of a read is this?! */ 48569873Snsayer return 0; 48669873Snsayer 48769873Snsayer s = spltty(); 48869873Snsayer while (!(sc->sc_count)) { 48969873Snsayer sc->sc_sleeping=1; 490111748Sdes error = tsleep( sc, PZERO | PCATCH, "jogrea", 0); 49169873Snsayer sc->sc_sleeping=0; 49269873Snsayer if (error) { 49369873Snsayer splx(s); 49469873Snsayer return error; 49569873Snsayer } 49669873Snsayer } 49769873Snsayer splx(s); 49869873Snsayer 49969873Snsayer s = spltty(); 50069873Snsayer l = min(uio->uio_resid, sc->sc_count); 50169873Snsayer bcopy(sc->sc_buf, buf, l); 50269873Snsayer sc->sc_count -= l; 50369873Snsayer bcopy(sc->sc_buf + l, sc->sc_buf, l); 50469873Snsayer splx(s); 50569873Snsayer return uiomove(buf, l, uio); 50669873Snsayer 50769873Snsayer} 50869873Snsayer 50969873Snsayerstatic int 51083366Sjulianspicioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 51169873Snsayer{ 51293071Swill struct spic_softc *sc; 51369873Snsayer 51493071Swill sc = devclass_get_softc(spic_devclass, 0); 51569873Snsayer 51669873Snsayer return EIO; 51769873Snsayer} 51869873Snsayer 51969873Snsayerstatic int 52083366Sjulianspicpoll(dev_t dev, int events, struct thread *td) 52169873Snsayer{ 52293071Swill struct spic_softc *sc; 52393071Swill int revents = 0, s; 52469873Snsayer 52593071Swill sc = devclass_get_softc(spic_devclass, 0); 52693071Swill s = spltty(); 52793071Swill if (events & (POLLIN | POLLRDNORM)) { 52893071Swill if (sc->sc_count) 52993071Swill revents |= events & (POLLIN | POLLRDNORM); 53093071Swill else 53193071Swill selrecord(td, &sc->sc_rsel); /* Who shall we wake? */ 53293071Swill } 53393071Swill splx(s); 53469873Snsayer 53593071Swill return revents; 53669873Snsayer} 53769873Snsayer 53869873Snsayer 53969873Snsayerstatic device_method_t spic_methods[] = { 54069873Snsayer DEVMETHOD(device_probe, spic_probe), 54169873Snsayer DEVMETHOD(device_attach, spic_attach), 54269873Snsayer 54369873Snsayer { 0, 0 } 54469873Snsayer}; 54569873Snsayer 54669873Snsayerstatic driver_t spic_driver = { 54769873Snsayer "spic", 54869873Snsayer spic_methods, 54969873Snsayer sizeof(struct spic_softc), 55069873Snsayer}; 55169873Snsayer 55269873SnsayerDRIVER_MODULE(spic, isa, spic_driver, spic_devclass, 0, 0); 55369873Snsayer 554