spic.c revision 129882
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 129882 2004-05-30 20:34:58Z phk $"); 53115703Sobrien 5469873Snsayer#include <sys/param.h> 5569873Snsayer#include <sys/systm.h> 5669873Snsayer#include <sys/kernel.h> 57129882Sphk#include <sys/module.h> 5869873Snsayer#include <sys/bus.h> 5969873Snsayer#include <machine/bus.h> 6069873Snsayer#include <sys/rman.h> 6169873Snsayer#include <machine/resource.h> 6269873Snsayer#include <isa/isavar.h> 6369873Snsayer#include <sys/poll.h> 6469873Snsayer#include <machine/pci_cfgreg.h> 6569873Snsayer#include <machine/clock.h> 6669873Snsayer#include <sys/tty.h> 6769873Snsayer#include <sys/conf.h> 6869873Snsayer#include <sys/fcntl.h> 6969873Snsayer#include <sys/malloc.h> 7069873Snsayer#include <sys/sysctl.h> 7169873Snsayer#include <sys/uio.h> 7269873Snsayer 7369873Snsayer#include <i386/isa/spicreg.h> 7469873Snsayer 7569873Snsayerstatic int spic_pollrate; 7669873Snsayer 7769873SnsayerSYSCTL_INT(_machdep, OID_AUTO, spic_pollrate, CTLFLAG_RW, &spic_pollrate, 0, "") 7869873Snsayer; 7969873Snsayer 8069873Snsayerdevclass_t spic_devclass; 8169873Snsayer 8269873Snsayerstatic d_open_t spicopen; 8369873Snsayerstatic d_close_t spicclose; 8469873Snsayerstatic d_read_t spicread; 8569873Snsayerstatic d_ioctl_t spicioctl; 8669873Snsayerstatic d_poll_t spicpoll; 8769873Snsayer 8869873Snsayerstatic struct cdevsw spic_cdevsw = { 89126080Sphk .d_version = D_VERSION, 90126080Sphk .d_flags = D_NEEDGIANT, 91111815Sphk .d_open = spicopen, 92111815Sphk .d_close = spicclose, 93111815Sphk .d_read = spicread, 94111815Sphk .d_ioctl = spicioctl, 95111815Sphk .d_poll = spicpoll, 96111815Sphk .d_name = "spic", 9769873Snsayer}; 9869873Snsayer 9969873Snsayer#define SCBUFLEN 128 10069873Snsayer 10169873Snsayerstruct spic_softc { 102118509Sbde u_int sc_port_addr; 10369873Snsayer u_char sc_intr; 10469873Snsayer struct resource *sc_port_res,*sc_intr_res; 10569873Snsayer int sc_port_rid,sc_intr_rid; 10669873Snsayer int sc_opened; 10769873Snsayer int sc_sleeping; 10869873Snsayer int sc_buttonlast; 10969873Snsayer struct callout_handle sc_timeout_ch; 11069873Snsayer device_t sc_dev; 11169873Snsayer struct selinfo sc_rsel; 11269873Snsayer u_char sc_buf[SCBUFLEN]; 11369873Snsayer int sc_count; 11493071Swill int sc_model; 11569873Snsayer}; 11669873Snsayer 11769873Snsayerstatic void 11869873Snsayerwrite_port1(struct spic_softc *sc, u_char val) 11969873Snsayer{ 12069873Snsayer DELAY(10); 12169873Snsayer outb(sc->sc_port_addr, val); 12269873Snsayer} 12369873Snsayer 12469873Snsayerstatic void 12569873Snsayerwrite_port2(struct spic_softc *sc, u_char val) 12669873Snsayer{ 12769873Snsayer DELAY(10); 12869873Snsayer outb(sc->sc_port_addr + 4, val); 12969873Snsayer} 13069873Snsayer 13169873Snsayerstatic u_char 13269873Snsayerread_port1(struct spic_softc *sc) 13369873Snsayer{ 13469873Snsayer DELAY(10); 13569873Snsayer return inb(sc->sc_port_addr); 13669873Snsayer} 13769873Snsayer 13869873Snsayerstatic u_char 13969873Snsayerread_port2(struct spic_softc *sc) 14069873Snsayer{ 14169873Snsayer DELAY(10); 14269873Snsayer return inb(sc->sc_port_addr + 4); 14369873Snsayer} 14469873Snsayer 14593071Swillstatic u_char 14693071Swillread_port_cst(struct spic_softc *sc) 14793071Swill{ 14893071Swill DELAY(10); 14993071Swill return inb(SPIC_CST_IOPORT); 15093071Swill} 15193071Swill 15269873Snsayerstatic void 15369873Snsayerbusy_wait(struct spic_softc *sc) 15469873Snsayer{ 15569873Snsayer int i=0; 15669873Snsayer 15769873Snsayer while(read_port2(sc) & 2) { 15869873Snsayer DELAY(10); 15969873Snsayer if (i++>10000) { 16069873Snsayer printf("spic busy wait abort\n"); 16169873Snsayer return; 16269873Snsayer } 16369873Snsayer } 16469873Snsayer} 16569873Snsayer 16693071Swillstatic void 16793071Swillbusy_wait_cst(struct spic_softc *sc, int mask) 16893071Swill{ 16993071Swill int i=0; 17093071Swill 17193071Swill while(read_port_cst(sc) & mask) { 17293071Swill DELAY(10); 17393071Swill if (i++>10000) { 17493071Swill printf("spic busy wait abort\n"); 17593071Swill return; 17693071Swill } 17793071Swill } 17893071Swill} 17993071Swill 18069873Snsayerstatic u_char 18169873Snsayerspic_call1(struct spic_softc *sc, u_char dev) { 18269873Snsayer busy_wait(sc); 18369873Snsayer write_port2(sc, dev); 18469873Snsayer read_port2(sc); 18569873Snsayer return read_port1(sc); 18669873Snsayer} 18769873Snsayer 18869873Snsayerstatic u_char 18969873Snsayerspic_call2(struct spic_softc *sc, u_char dev, u_char fn) 19069873Snsayer{ 19169873Snsayer busy_wait(sc); 19269873Snsayer write_port2(sc, dev); 19369873Snsayer busy_wait(sc); 19469873Snsayer write_port1(sc, fn); 19569873Snsayer return read_port1(sc); 19669873Snsayer} 19769873Snsayer 19893071Swillstatic void 19993071Swillspic_ecrset(struct spic_softc *sc, u_int16_t addr, u_int16_t value) 20093071Swill{ 20193071Swill busy_wait_cst(sc, 3); 20293071Swill outb(SPIC_CST_IOPORT, 0x81); 20393071Swill busy_wait_cst(sc, 2); 20493071Swill outb(SPIC_DATA_IOPORT, addr); 20593071Swill busy_wait_cst(sc, 2); 20693071Swill outb(SPIC_DATA_IOPORT, value); 20793071Swill busy_wait_cst(sc, 2); 20893071Swill} 20993071Swill 21093071Swillstatic void 21193071Swillspic_type2_srs(struct spic_softc *sc) 21293071Swill{ 21393071Swill spic_ecrset(sc, SPIC_SHIB, (sc->sc_port_addr & 0xFF00) >> 8); 21493071Swill spic_ecrset(sc, SPIC_SLOB, sc->sc_port_addr & 0x00FF); 21593071Swill spic_ecrset(sc, SPIC_SIRQ, 0x00); /* using polling mode (IRQ=0)*/ 21693071Swill DELAY(10); 21793071Swill} 21893071Swill 21969873Snsayerstatic int 22069873Snsayerspic_probe(device_t dev) 22169873Snsayer{ 22293071Swill struct spic_softc *sc; 22369873Snsayer u_char t, spic_irq; 22469873Snsayer 22593071Swill sc = device_get_softc(dev); 22669873Snsayer 22769873Snsayer /* 22869873Snsayer * We can only have 1 of these. Attempting to probe for a unit 1 22969873Snsayer * will destroy the work we did for unit 0 23069873Snsayer */ 23169873Snsayer if (device_get_unit(dev)) 23269873Snsayer return ENXIO; 23369873Snsayer 23469873Snsayer bzero(sc, sizeof(struct spic_softc)); 23569873Snsayer 23669873Snsayer if (!(sc->sc_port_res = bus_alloc_resource(dev, SYS_RES_IOPORT, 23769873Snsayer &sc->sc_port_rid, 0, ~0, 5, RF_ACTIVE))) { 23869873Snsayer device_printf(dev,"Couldn't map I/O\n"); 23969873Snsayer return ENXIO; 24069873Snsayer } 24169873Snsayer sc->sc_port_addr = (u_short)rman_get_start(sc->sc_port_res); 24269873Snsayer 24369873Snsayer#ifdef notyet 244127135Snjl if (!(sc->sc_intr_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, 245127135Snjl &sc->sc_intr_rid, RF_ACTIVE))) { 24669873Snsayer device_printf(dev,"Couldn't map IRQ\n"); 24769873Snsayer bus_release_resource(dev, SYS_RES_IOPORT, 24869873Snsayer sc->sc_port_rid, sc->sc_port_res); 24969873Snsayer return ENXIO; 25069873Snsayer } 25169873Snsayer sc->sc_intr = (u_short)rman_get_start(sc->sc_intr_res); 25269873Snsayer 25369873Snsayer switch (sc->sc_intr) { 25469873Snsayer case 0: spic_irq = 3; break; 25569873Snsayer case 5: spic_irq = 0; break; 25669873Snsayer case 0xa: spic_irq = 1; break; 25769873Snsayer case 0xb: spic_irq = 2; break; 25869873Snsayer default: device_printf(dev,"Invalid IRQ\n"); 25969873Snsayer bus_release_resource(dev, SYS_RES_IOPORT, 26069873Snsayer sc->sc_port_rid, sc->sc_port_res); 26169873Snsayer bus_release_resource(dev, SYS_RES_IRQ, 26269873Snsayer sc->sc_intr_rid, sc->sc_intr_res); 26369873Snsayer return ENXIO; 26469873Snsayer } 26569873Snsayer#else 26669873Snsayer spic_irq = 3; 26769873Snsayer#endif 26869873Snsayer 26969873Snsayer#if 0 27069873Snsayer if (sc->sc_port_addr != 0x10A0) { 27169873Snsayer bus_release_resource(dev, SYS_RES_IOPORT, 27269873Snsayer sc->sc_port_rid, sc->sc_port_res); 27369873Snsayer bus_release_resource(dev, SYS_RES_IRQ, 27469873Snsayer sc->sc_intr_rid, sc->sc_intr_res); 27569873Snsayer return ENXIO; 27669873Snsayer } 27769873Snsayer#endif 27869873Snsayer 27969873Snsayer /* PIIX4 chipset at least? */ 28093071Swill if (pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, 0, 4) == 28193071Swill PIIX4_DEVID) { 28293071Swill sc->sc_model = SPIC_DEVICE_MODEL_TYPE1; 28393071Swill } else { 28493071Swill /* For newer VAIOs (R505, SRX7, ...) */ 28593071Swill sc->sc_model = SPIC_DEVICE_MODEL_TYPE2; 28693071Swill } 28769873Snsayer 28869873Snsayer /* 28969873Snsayer * This is an ugly hack. It is necessary until ACPI works correctly. 29069873Snsayer * 29169873Snsayer * The SPIC consists of 2 registers. They are mapped onto I/O by the 29269873Snsayer * PIIX4's General Device 10 function. There is also an interrupt 29369873Snsayer * control port at a somewhat magic location, but this first pass is 29469873Snsayer * polled. 29569873Snsayer * 29669873Snsayer * So the first thing we need to do is map the G10 space in. 29769873Snsayer * 29869873Snsayer */ 29969873Snsayer 30093071Swill /* Enable ACPI mode to get Fn key events */ 30193071Swill /* XXX This may slow down your VAIO if ACPI is not supported in the kernel. 30293071Swill outb(0xb2, 0xf0); 30393071Swill */ 30469873Snsayer 30593071Swill device_printf(dev,"device model type = %d\n", sc->sc_model); 30693071Swill 30793071Swill if(sc->sc_model == SPIC_DEVICE_MODEL_TYPE1) { 30893071Swill pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10A, 30993071Swill sc->sc_port_addr, 2); 31093071Swill t = pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, 1); 31193071Swill t &= 0xf0; 31293071Swill t |= 4; 31393071Swill pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, t, 1); 31493071Swill outw(SPIC_IRQ_PORT, (inw(SPIC_IRQ_PORT) & ~(0x3 << SPIC_IRQ_SHIFT)) | (spic_irq << SPIC_IRQ_SHIFT)); 31593071Swill t = pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, 1); 31693071Swill t &= 0x1f; 31793071Swill t |= 0xc0; 31893071Swill pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, t, 1); 31993071Swill } else { 32093071Swill spic_type2_srs(sc); 32193071Swill } 32293071Swill 32369873Snsayer /* 32469873Snsayer * XXX: Should try and see if there's anything actually there. 32569873Snsayer */ 32669873Snsayer 32769873Snsayer device_set_desc(dev, "Sony Programmable I/O Controller"); 32869873Snsayer 32969873Snsayer return 0; 33069873Snsayer} 33169873Snsayer 33269873Snsayerstatic int 33369873Snsayerspic_attach(device_t dev) 33469873Snsayer{ 33593071Swill struct spic_softc *sc; 33669873Snsayer 33793071Swill sc = device_get_softc(dev); 33869873Snsayer 33969873Snsayer sc->sc_dev = dev; 34069873Snsayer 34169873Snsayer spic_pollrate = (hz/50); /* Every 50th of a second */ 34269873Snsayer 34369873Snsayer spic_call1(sc, 0x82); 34469873Snsayer spic_call2(sc, 0x81, 0xff); 34569873Snsayer spic_call1(sc, 0x92); 34669873Snsayer 34793071Swill /* There can be only one */ 34893071Swill make_dev(&spic_cdevsw, 0, 0, 0, 0600, "jogdial"); 34969873Snsayer 35069873Snsayer return 0; 35169873Snsayer} 35269873Snsayer 35369873Snsayerstatic void 35469873Snsayerspictimeout(void *arg) 35569873Snsayer{ 35693071Swill struct spic_softc *sc = arg; 35769873Snsayer u_char b, event, param; 35869873Snsayer int j; 35969873Snsayer 36093071Swill if (!sc->sc_opened) { 36193071Swill device_printf(sc->sc_dev, "timeout called while closed!\n"); 36293071Swill return; 36393071Swill } 36469873Snsayer 36569873Snsayer event = read_port2(sc); 36669873Snsayer param = read_port1(sc); 36769873Snsayer 36869873Snsayer if ((event != 4) && (!(event & 0x1))) 36969873Snsayer switch(event) { 37093071Swill case 0x10: /* jog wheel event (type1) */ 37193071Swill if (sc->sc_model == SPIC_DEVICE_MODEL_TYPE1) { 37293071Swill b = !!(param & 0x40); 37393071Swill if (b != sc->sc_buttonlast) { 37493071Swill sc->sc_buttonlast = b; 37569873Snsayer sc->sc_buf[sc->sc_count++] = 37693071Swill b?'d':'u'; 37769873Snsayer } 37893071Swill j = (param & 0xf) | ((param & 0x10)? ~0xf:0); 37993071Swill if (j<0) 38093071Swill while(j++!=0) { 38193071Swill sc->sc_buf[sc->sc_count++] = 38293071Swill 'l'; 38393071Swill } 38493071Swill else if (j>0) 38593071Swill while(j--!=0) { 38693071Swill sc->sc_buf[sc->sc_count++] = 38793071Swill 'r'; 38893071Swill } 38993071Swill } 39093071Swill break; 39193071Swill case 0x08: /* jog wheel event (type2) */ 39293071Swill case 0x00: 39393071Swill /* SPIC_DEVICE_MODEL_TYPE2 returns jog wheel event=0x00 */ 39493071Swill if (sc->sc_model == SPIC_DEVICE_MODEL_TYPE2) { 39593071Swill b = !!(param & 0x40); 39693071Swill if (b != sc->sc_buttonlast) { 39793071Swill sc->sc_buttonlast = b; 39869873Snsayer sc->sc_buf[sc->sc_count++] = 39993071Swill b?'d':'u'; 40069873Snsayer } 40193071Swill j = (param & 0xf) | ((param & 0x10)? ~0xf:0); 40293071Swill if (j<0) 40393071Swill while(j++!=0) { 40493071Swill sc->sc_buf[sc->sc_count++] = 40593071Swill 'l'; 40693071Swill } 40793071Swill else if (j>0) 40893071Swill while(j--!=0) { 40993071Swill sc->sc_buf[sc->sc_count++] = 41093071Swill 'r'; 41193071Swill } 41293071Swill } 41369873Snsayer break; 41469873Snsayer case 0x60: /* Capture button */ 41569873Snsayer printf("Capture button event: %x\n",param); 41669873Snsayer break; 41769873Snsayer case 0x30: /* Lid switch */ 41869873Snsayer printf("Lid switch event: %x\n",param); 41969873Snsayer break; 42093071Swill case 0x0c: /* We must ignore these type of event for C1VP... */ 42193071Swill case 0x70: /* Closing/Opening the lid on C1VP */ 42293071Swill break; 42369873Snsayer default: 42493071Swill printf("Unknown event: event %02x param %02x\n", event, param); 42569873Snsayer break; 42669873Snsayer } 42769873Snsayer else { 42869873Snsayer /* No event. Wait some more */ 42993071Swill sc->sc_timeout_ch = timeout(spictimeout, sc, spic_pollrate); 43069873Snsayer return; 43169873Snsayer } 43269873Snsayer 43369873Snsayer if (sc->sc_count) { 43469873Snsayer if (sc->sc_sleeping) { 43569873Snsayer sc->sc_sleeping = 0; 436111748Sdes wakeup( sc); 43769873Snsayer } 438122352Stanimura selwakeuppri(&sc->sc_rsel, PZERO); 43969873Snsayer } 44069873Snsayer spic_call2(sc, 0x81, 0xff); /* Clear event */ 44169873Snsayer 44293071Swill sc->sc_timeout_ch = timeout(spictimeout, sc, spic_pollrate); 44369873Snsayer} 44469873Snsayer 44569873Snsayerstatic int 44683366Sjulianspicopen(dev_t dev, int flag, int fmt, struct thread *td) 44769873Snsayer{ 44893071Swill struct spic_softc *sc; 44969873Snsayer 45093071Swill sc = devclass_get_softc(spic_devclass, 0); 45169873Snsayer 45293071Swill if (sc->sc_opened) 45393071Swill return EBUSY; 45469873Snsayer 45569873Snsayer sc->sc_opened++; 45669873Snsayer sc->sc_count=0; 45769873Snsayer 45893071Swill /* Start the polling */ 45993071Swill timeout(spictimeout, sc, spic_pollrate); 46093071Swill return 0; 46169873Snsayer} 46269873Snsayer 46369873Snsayerstatic int 46483366Sjulianspicclose(dev_t dev, int flag, int fmt, struct thread *td) 46569873Snsayer{ 46693071Swill struct spic_softc *sc; 46769873Snsayer 46893071Swill sc = devclass_get_softc(spic_devclass, 0); 46969873Snsayer 47093071Swill /* Stop polling */ 47193071Swill untimeout(spictimeout, sc, sc->sc_timeout_ch); 47293071Swill sc->sc_opened = 0; 47393071Swill return 0; 47469873Snsayer} 47569873Snsayer 47669873Snsayerstatic int 47769873Snsayerspicread(dev_t dev, struct uio *uio, int flag) 47869873Snsayer{ 47993071Swill struct spic_softc *sc; 48069873Snsayer int l, s, error; 48169873Snsayer u_char buf[SCBUFLEN]; 48269873Snsayer 48393071Swill sc = devclass_get_softc(spic_devclass, 0); 48469873Snsayer 48569873Snsayer if (uio->uio_resid <= 0) /* What kind of a read is this?! */ 48669873Snsayer return 0; 48769873Snsayer 48869873Snsayer s = spltty(); 48969873Snsayer while (!(sc->sc_count)) { 49069873Snsayer sc->sc_sleeping=1; 491111748Sdes error = tsleep( sc, PZERO | PCATCH, "jogrea", 0); 49269873Snsayer sc->sc_sleeping=0; 49369873Snsayer if (error) { 49469873Snsayer splx(s); 49569873Snsayer return error; 49669873Snsayer } 49769873Snsayer } 49869873Snsayer splx(s); 49969873Snsayer 50069873Snsayer s = spltty(); 50169873Snsayer l = min(uio->uio_resid, sc->sc_count); 50269873Snsayer bcopy(sc->sc_buf, buf, l); 50369873Snsayer sc->sc_count -= l; 50469873Snsayer bcopy(sc->sc_buf + l, sc->sc_buf, l); 50569873Snsayer splx(s); 50669873Snsayer return uiomove(buf, l, uio); 50769873Snsayer 50869873Snsayer} 50969873Snsayer 51069873Snsayerstatic int 51183366Sjulianspicioctl(dev_t dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 51269873Snsayer{ 51393071Swill struct spic_softc *sc; 51469873Snsayer 51593071Swill sc = devclass_get_softc(spic_devclass, 0); 51669873Snsayer 51769873Snsayer return EIO; 51869873Snsayer} 51969873Snsayer 52069873Snsayerstatic int 52183366Sjulianspicpoll(dev_t dev, int events, struct thread *td) 52269873Snsayer{ 52393071Swill struct spic_softc *sc; 52493071Swill int revents = 0, s; 52569873Snsayer 52693071Swill sc = devclass_get_softc(spic_devclass, 0); 52793071Swill s = spltty(); 52893071Swill if (events & (POLLIN | POLLRDNORM)) { 52993071Swill if (sc->sc_count) 53093071Swill revents |= events & (POLLIN | POLLRDNORM); 53193071Swill else 53293071Swill selrecord(td, &sc->sc_rsel); /* Who shall we wake? */ 53393071Swill } 53493071Swill splx(s); 53569873Snsayer 53693071Swill return revents; 53769873Snsayer} 53869873Snsayer 53969873Snsayer 54069873Snsayerstatic device_method_t spic_methods[] = { 54169873Snsayer DEVMETHOD(device_probe, spic_probe), 54269873Snsayer DEVMETHOD(device_attach, spic_attach), 54369873Snsayer 54469873Snsayer { 0, 0 } 54569873Snsayer}; 54669873Snsayer 54769873Snsayerstatic driver_t spic_driver = { 54869873Snsayer "spic", 54969873Snsayer spic_methods, 55069873Snsayer sizeof(struct spic_softc), 55169873Snsayer}; 55269873Snsayer 55369873SnsayerDRIVER_MODULE(spic, isa, spic_driver, spic_devclass, 0, 0); 55469873Snsayer 555