spic.c revision 139790
1139790Simp/*- 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. 25139790Simp */ 26139790Simp 27139790Simp/* spic -- the Sony Programmable I/O Controller 2869873Snsayer * 2969873Snsayer * This device exists on most recent Sony laptops. It is the means by which 3069873Snsayer * you can watch the Jog Dial and some other functions. 3169873Snsayer * 3269873Snsayer * At the moment, this driver merely tries to turn the jog dial into a 3369873Snsayer * device that moused can park on, with the intent of supplying a Z axis 3469873Snsayer * and mouse button out of the jog dial. I suspect that this device will 3569873Snsayer * end up having to support at least 2 different minor devices: One to be 3669873Snsayer * the jog wheel device for moused to camp out on and the other to perform 3769873Snsayer * all of the other miscelaneous functions of this device. But for now, 3869873Snsayer * the jog wheel is all you get. 3969873Snsayer * 4069873Snsayer * At the moment, the data sent back by the device is rather primitive. 4169873Snsayer * It sends a single character per event: 4269873Snsayer * u = up, d = down -- that's the jog button 4369873Snsayer * l = left, r = right -- that's the dial. 4469873Snsayer * "left" and "right" are rather caprecious. They actually represent 4569873Snsayer * ccw and cw, respectively 4669873Snsayer * 4769873Snsayer * What documentation exists is thanks to Andrew Tridge, and his page at 4869873Snsayer * http://samba.org/picturebook/ Special thanks also to Ian Dowse, who 4969873Snsayer * also provided sample code upon which this driver was based. 5069873Snsayer */ 5169873Snsayer 52115703Sobrien#include <sys/cdefs.h> 53115703Sobrien__FBSDID("$FreeBSD: head/sys/i386/isa/spic.c 139790 2005-01-06 22:18:23Z imp $"); 54115703Sobrien 5569873Snsayer#include <sys/param.h> 5669873Snsayer#include <sys/systm.h> 5769873Snsayer#include <sys/kernel.h> 58129882Sphk#include <sys/module.h> 5969873Snsayer#include <sys/bus.h> 6069873Snsayer#include <machine/bus.h> 6169873Snsayer#include <sys/rman.h> 6269873Snsayer#include <machine/resource.h> 6369873Snsayer#include <isa/isavar.h> 6469873Snsayer#include <sys/poll.h> 6569873Snsayer#include <machine/pci_cfgreg.h> 6669873Snsayer#include <machine/clock.h> 6769873Snsayer#include <sys/tty.h> 6869873Snsayer#include <sys/conf.h> 6969873Snsayer#include <sys/fcntl.h> 7069873Snsayer#include <sys/malloc.h> 7169873Snsayer#include <sys/sysctl.h> 7269873Snsayer#include <sys/uio.h> 7369873Snsayer 7469873Snsayer#include <i386/isa/spicreg.h> 7569873Snsayer 7669873Snsayerstatic int spic_pollrate; 7769873Snsayer 7869873SnsayerSYSCTL_INT(_machdep, OID_AUTO, spic_pollrate, CTLFLAG_RW, &spic_pollrate, 0, "") 7969873Snsayer; 8069873Snsayer 8169873Snsayerdevclass_t spic_devclass; 8269873Snsayer 8369873Snsayerstatic d_open_t spicopen; 8469873Snsayerstatic d_close_t spicclose; 8569873Snsayerstatic d_read_t spicread; 8669873Snsayerstatic d_ioctl_t spicioctl; 8769873Snsayerstatic d_poll_t spicpoll; 8869873Snsayer 8969873Snsayerstatic struct cdevsw spic_cdevsw = { 90126080Sphk .d_version = D_VERSION, 91126080Sphk .d_flags = D_NEEDGIANT, 92111815Sphk .d_open = spicopen, 93111815Sphk .d_close = spicclose, 94111815Sphk .d_read = spicread, 95111815Sphk .d_ioctl = spicioctl, 96111815Sphk .d_poll = spicpoll, 97111815Sphk .d_name = "spic", 9869873Snsayer}; 9969873Snsayer 10069873Snsayer#define SCBUFLEN 128 10169873Snsayer 10269873Snsayerstruct spic_softc { 103118509Sbde u_int sc_port_addr; 10469873Snsayer u_char sc_intr; 10569873Snsayer struct resource *sc_port_res,*sc_intr_res; 10669873Snsayer int sc_port_rid,sc_intr_rid; 10769873Snsayer int sc_opened; 10869873Snsayer int sc_sleeping; 10969873Snsayer int sc_buttonlast; 11069873Snsayer struct callout_handle sc_timeout_ch; 11169873Snsayer device_t sc_dev; 11269873Snsayer struct selinfo sc_rsel; 11369873Snsayer u_char sc_buf[SCBUFLEN]; 11469873Snsayer int sc_count; 11593071Swill int sc_model; 11669873Snsayer}; 11769873Snsayer 11869873Snsayerstatic void 11969873Snsayerwrite_port1(struct spic_softc *sc, u_char val) 12069873Snsayer{ 12169873Snsayer DELAY(10); 12269873Snsayer outb(sc->sc_port_addr, val); 12369873Snsayer} 12469873Snsayer 12569873Snsayerstatic void 12669873Snsayerwrite_port2(struct spic_softc *sc, u_char val) 12769873Snsayer{ 12869873Snsayer DELAY(10); 12969873Snsayer outb(sc->sc_port_addr + 4, val); 13069873Snsayer} 13169873Snsayer 13269873Snsayerstatic u_char 13369873Snsayerread_port1(struct spic_softc *sc) 13469873Snsayer{ 13569873Snsayer DELAY(10); 13669873Snsayer return inb(sc->sc_port_addr); 13769873Snsayer} 13869873Snsayer 13969873Snsayerstatic u_char 14069873Snsayerread_port2(struct spic_softc *sc) 14169873Snsayer{ 14269873Snsayer DELAY(10); 14369873Snsayer return inb(sc->sc_port_addr + 4); 14469873Snsayer} 14569873Snsayer 14693071Swillstatic u_char 14793071Swillread_port_cst(struct spic_softc *sc) 14893071Swill{ 14993071Swill DELAY(10); 15093071Swill return inb(SPIC_CST_IOPORT); 15193071Swill} 15293071Swill 15369873Snsayerstatic void 15469873Snsayerbusy_wait(struct spic_softc *sc) 15569873Snsayer{ 15669873Snsayer int i=0; 15769873Snsayer 15869873Snsayer while(read_port2(sc) & 2) { 15969873Snsayer DELAY(10); 16069873Snsayer if (i++>10000) { 16169873Snsayer printf("spic busy wait abort\n"); 16269873Snsayer return; 16369873Snsayer } 16469873Snsayer } 16569873Snsayer} 16669873Snsayer 16793071Swillstatic void 16893071Swillbusy_wait_cst(struct spic_softc *sc, int mask) 16993071Swill{ 17093071Swill int i=0; 17193071Swill 17293071Swill while(read_port_cst(sc) & mask) { 17393071Swill DELAY(10); 17493071Swill if (i++>10000) { 17593071Swill printf("spic busy wait abort\n"); 17693071Swill return; 17793071Swill } 17893071Swill } 17993071Swill} 18093071Swill 18169873Snsayerstatic u_char 18269873Snsayerspic_call1(struct spic_softc *sc, u_char dev) { 18369873Snsayer busy_wait(sc); 18469873Snsayer write_port2(sc, dev); 18569873Snsayer read_port2(sc); 18669873Snsayer return read_port1(sc); 18769873Snsayer} 18869873Snsayer 18969873Snsayerstatic u_char 19069873Snsayerspic_call2(struct spic_softc *sc, u_char dev, u_char fn) 19169873Snsayer{ 19269873Snsayer busy_wait(sc); 19369873Snsayer write_port2(sc, dev); 19469873Snsayer busy_wait(sc); 19569873Snsayer write_port1(sc, fn); 19669873Snsayer return read_port1(sc); 19769873Snsayer} 19869873Snsayer 19993071Swillstatic void 20093071Swillspic_ecrset(struct spic_softc *sc, u_int16_t addr, u_int16_t value) 20193071Swill{ 20293071Swill busy_wait_cst(sc, 3); 20393071Swill outb(SPIC_CST_IOPORT, 0x81); 20493071Swill busy_wait_cst(sc, 2); 20593071Swill outb(SPIC_DATA_IOPORT, addr); 20693071Swill busy_wait_cst(sc, 2); 20793071Swill outb(SPIC_DATA_IOPORT, value); 20893071Swill busy_wait_cst(sc, 2); 20993071Swill} 21093071Swill 21193071Swillstatic void 21293071Swillspic_type2_srs(struct spic_softc *sc) 21393071Swill{ 21493071Swill spic_ecrset(sc, SPIC_SHIB, (sc->sc_port_addr & 0xFF00) >> 8); 21593071Swill spic_ecrset(sc, SPIC_SLOB, sc->sc_port_addr & 0x00FF); 21693071Swill spic_ecrset(sc, SPIC_SIRQ, 0x00); /* using polling mode (IRQ=0)*/ 21793071Swill DELAY(10); 21893071Swill} 21993071Swill 22069873Snsayerstatic int 22169873Snsayerspic_probe(device_t dev) 22269873Snsayer{ 22393071Swill struct spic_softc *sc; 22469873Snsayer u_char t, spic_irq; 22569873Snsayer 22693071Swill sc = device_get_softc(dev); 22769873Snsayer 22869873Snsayer /* 22969873Snsayer * We can only have 1 of these. Attempting to probe for a unit 1 23069873Snsayer * will destroy the work we did for unit 0 23169873Snsayer */ 23269873Snsayer if (device_get_unit(dev)) 23369873Snsayer return ENXIO; 23469873Snsayer 23569873Snsayer bzero(sc, sizeof(struct spic_softc)); 23669873Snsayer 23769873Snsayer if (!(sc->sc_port_res = bus_alloc_resource(dev, SYS_RES_IOPORT, 23869873Snsayer &sc->sc_port_rid, 0, ~0, 5, RF_ACTIVE))) { 23969873Snsayer device_printf(dev,"Couldn't map I/O\n"); 24069873Snsayer return ENXIO; 24169873Snsayer } 24269873Snsayer sc->sc_port_addr = (u_short)rman_get_start(sc->sc_port_res); 24369873Snsayer 24469873Snsayer#ifdef notyet 245127135Snjl if (!(sc->sc_intr_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, 246127135Snjl &sc->sc_intr_rid, RF_ACTIVE))) { 24769873Snsayer device_printf(dev,"Couldn't map IRQ\n"); 24869873Snsayer bus_release_resource(dev, SYS_RES_IOPORT, 24969873Snsayer sc->sc_port_rid, sc->sc_port_res); 25069873Snsayer return ENXIO; 25169873Snsayer } 25269873Snsayer sc->sc_intr = (u_short)rman_get_start(sc->sc_intr_res); 25369873Snsayer 25469873Snsayer switch (sc->sc_intr) { 25569873Snsayer case 0: spic_irq = 3; break; 25669873Snsayer case 5: spic_irq = 0; break; 25769873Snsayer case 0xa: spic_irq = 1; break; 25869873Snsayer case 0xb: spic_irq = 2; break; 25969873Snsayer default: device_printf(dev,"Invalid IRQ\n"); 26069873Snsayer bus_release_resource(dev, SYS_RES_IOPORT, 26169873Snsayer sc->sc_port_rid, sc->sc_port_res); 26269873Snsayer bus_release_resource(dev, SYS_RES_IRQ, 26369873Snsayer sc->sc_intr_rid, sc->sc_intr_res); 26469873Snsayer return ENXIO; 26569873Snsayer } 26669873Snsayer#else 26769873Snsayer spic_irq = 3; 26869873Snsayer#endif 26969873Snsayer 27069873Snsayer#if 0 27169873Snsayer if (sc->sc_port_addr != 0x10A0) { 27269873Snsayer bus_release_resource(dev, SYS_RES_IOPORT, 27369873Snsayer sc->sc_port_rid, sc->sc_port_res); 27469873Snsayer bus_release_resource(dev, SYS_RES_IRQ, 27569873Snsayer sc->sc_intr_rid, sc->sc_intr_res); 27669873Snsayer return ENXIO; 27769873Snsayer } 27869873Snsayer#endif 27969873Snsayer 28069873Snsayer /* PIIX4 chipset at least? */ 28193071Swill if (pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, 0, 4) == 28293071Swill PIIX4_DEVID) { 28393071Swill sc->sc_model = SPIC_DEVICE_MODEL_TYPE1; 28493071Swill } else { 28593071Swill /* For newer VAIOs (R505, SRX7, ...) */ 28693071Swill sc->sc_model = SPIC_DEVICE_MODEL_TYPE2; 28793071Swill } 28869873Snsayer 28969873Snsayer /* 29069873Snsayer * This is an ugly hack. It is necessary until ACPI works correctly. 29169873Snsayer * 29269873Snsayer * The SPIC consists of 2 registers. They are mapped onto I/O by the 29369873Snsayer * PIIX4's General Device 10 function. There is also an interrupt 29469873Snsayer * control port at a somewhat magic location, but this first pass is 29569873Snsayer * polled. 29669873Snsayer * 29769873Snsayer * So the first thing we need to do is map the G10 space in. 29869873Snsayer * 29969873Snsayer */ 30069873Snsayer 30193071Swill /* Enable ACPI mode to get Fn key events */ 30293071Swill /* XXX This may slow down your VAIO if ACPI is not supported in the kernel. 30393071Swill outb(0xb2, 0xf0); 30493071Swill */ 30569873Snsayer 30693071Swill device_printf(dev,"device model type = %d\n", sc->sc_model); 30793071Swill 30893071Swill if(sc->sc_model == SPIC_DEVICE_MODEL_TYPE1) { 30993071Swill pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10A, 31093071Swill sc->sc_port_addr, 2); 31193071Swill t = pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, 1); 31293071Swill t &= 0xf0; 31393071Swill t |= 4; 31493071Swill pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, t, 1); 31593071Swill outw(SPIC_IRQ_PORT, (inw(SPIC_IRQ_PORT) & ~(0x3 << SPIC_IRQ_SHIFT)) | (spic_irq << SPIC_IRQ_SHIFT)); 31693071Swill t = pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, 1); 31793071Swill t &= 0x1f; 31893071Swill t |= 0xc0; 31993071Swill pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, t, 1); 32093071Swill } else { 32193071Swill spic_type2_srs(sc); 32293071Swill } 32393071Swill 32469873Snsayer /* 32569873Snsayer * XXX: Should try and see if there's anything actually there. 32669873Snsayer */ 32769873Snsayer 32869873Snsayer device_set_desc(dev, "Sony Programmable I/O Controller"); 32969873Snsayer 33069873Snsayer return 0; 33169873Snsayer} 33269873Snsayer 33369873Snsayerstatic int 33469873Snsayerspic_attach(device_t dev) 33569873Snsayer{ 33693071Swill struct spic_softc *sc; 33769873Snsayer 33893071Swill sc = device_get_softc(dev); 33969873Snsayer 34069873Snsayer sc->sc_dev = dev; 34169873Snsayer 34269873Snsayer spic_pollrate = (hz/50); /* Every 50th of a second */ 34369873Snsayer 34469873Snsayer spic_call1(sc, 0x82); 34569873Snsayer spic_call2(sc, 0x81, 0xff); 34669873Snsayer spic_call1(sc, 0x92); 34769873Snsayer 34893071Swill /* There can be only one */ 34993071Swill make_dev(&spic_cdevsw, 0, 0, 0, 0600, "jogdial"); 35069873Snsayer 35169873Snsayer return 0; 35269873Snsayer} 35369873Snsayer 35469873Snsayerstatic void 35569873Snsayerspictimeout(void *arg) 35669873Snsayer{ 35793071Swill struct spic_softc *sc = arg; 35869873Snsayer u_char b, event, param; 35969873Snsayer int j; 36069873Snsayer 36193071Swill if (!sc->sc_opened) { 36293071Swill device_printf(sc->sc_dev, "timeout called while closed!\n"); 36393071Swill return; 36493071Swill } 36569873Snsayer 36669873Snsayer event = read_port2(sc); 36769873Snsayer param = read_port1(sc); 36869873Snsayer 36969873Snsayer if ((event != 4) && (!(event & 0x1))) 37069873Snsayer switch(event) { 37193071Swill case 0x10: /* jog wheel event (type1) */ 37293071Swill if (sc->sc_model == SPIC_DEVICE_MODEL_TYPE1) { 37393071Swill b = !!(param & 0x40); 37493071Swill if (b != sc->sc_buttonlast) { 37593071Swill sc->sc_buttonlast = b; 37669873Snsayer sc->sc_buf[sc->sc_count++] = 37793071Swill b?'d':'u'; 37869873Snsayer } 37993071Swill j = (param & 0xf) | ((param & 0x10)? ~0xf:0); 38093071Swill if (j<0) 38193071Swill while(j++!=0) { 38293071Swill sc->sc_buf[sc->sc_count++] = 38393071Swill 'l'; 38493071Swill } 38593071Swill else if (j>0) 38693071Swill while(j--!=0) { 38793071Swill sc->sc_buf[sc->sc_count++] = 38893071Swill 'r'; 38993071Swill } 39093071Swill } 39193071Swill break; 39293071Swill case 0x08: /* jog wheel event (type2) */ 39393071Swill case 0x00: 39493071Swill /* SPIC_DEVICE_MODEL_TYPE2 returns jog wheel event=0x00 */ 39593071Swill if (sc->sc_model == SPIC_DEVICE_MODEL_TYPE2) { 39693071Swill b = !!(param & 0x40); 39793071Swill if (b != sc->sc_buttonlast) { 39893071Swill sc->sc_buttonlast = b; 39969873Snsayer sc->sc_buf[sc->sc_count++] = 40093071Swill b?'d':'u'; 40169873Snsayer } 40293071Swill j = (param & 0xf) | ((param & 0x10)? ~0xf:0); 40393071Swill if (j<0) 40493071Swill while(j++!=0) { 40593071Swill sc->sc_buf[sc->sc_count++] = 40693071Swill 'l'; 40793071Swill } 40893071Swill else if (j>0) 40993071Swill while(j--!=0) { 41093071Swill sc->sc_buf[sc->sc_count++] = 41193071Swill 'r'; 41293071Swill } 41393071Swill } 41469873Snsayer break; 41569873Snsayer case 0x60: /* Capture button */ 41669873Snsayer printf("Capture button event: %x\n",param); 41769873Snsayer break; 41869873Snsayer case 0x30: /* Lid switch */ 41969873Snsayer printf("Lid switch event: %x\n",param); 42069873Snsayer break; 42193071Swill case 0x0c: /* We must ignore these type of event for C1VP... */ 42293071Swill case 0x70: /* Closing/Opening the lid on C1VP */ 42393071Swill break; 42469873Snsayer default: 42593071Swill printf("Unknown event: event %02x param %02x\n", event, param); 42669873Snsayer break; 42769873Snsayer } 42869873Snsayer else { 42969873Snsayer /* No event. Wait some more */ 43093071Swill sc->sc_timeout_ch = timeout(spictimeout, sc, spic_pollrate); 43169873Snsayer return; 43269873Snsayer } 43369873Snsayer 43469873Snsayer if (sc->sc_count) { 43569873Snsayer if (sc->sc_sleeping) { 43669873Snsayer sc->sc_sleeping = 0; 437111748Sdes wakeup( sc); 43869873Snsayer } 439122352Stanimura selwakeuppri(&sc->sc_rsel, PZERO); 44069873Snsayer } 44169873Snsayer spic_call2(sc, 0x81, 0xff); /* Clear event */ 44269873Snsayer 44393071Swill sc->sc_timeout_ch = timeout(spictimeout, sc, spic_pollrate); 44469873Snsayer} 44569873Snsayer 44669873Snsayerstatic int 447130585Sphkspicopen(struct cdev *dev, int flag, int fmt, struct thread *td) 44869873Snsayer{ 44993071Swill struct spic_softc *sc; 45069873Snsayer 45193071Swill sc = devclass_get_softc(spic_devclass, 0); 45269873Snsayer 45393071Swill if (sc->sc_opened) 45493071Swill return EBUSY; 45569873Snsayer 45669873Snsayer sc->sc_opened++; 45769873Snsayer sc->sc_count=0; 45869873Snsayer 45993071Swill /* Start the polling */ 46093071Swill timeout(spictimeout, sc, spic_pollrate); 46193071Swill return 0; 46269873Snsayer} 46369873Snsayer 46469873Snsayerstatic int 465130585Sphkspicclose(struct cdev *dev, int flag, int fmt, struct thread *td) 46669873Snsayer{ 46793071Swill struct spic_softc *sc; 46869873Snsayer 46993071Swill sc = devclass_get_softc(spic_devclass, 0); 47069873Snsayer 47193071Swill /* Stop polling */ 47293071Swill untimeout(spictimeout, sc, sc->sc_timeout_ch); 47393071Swill sc->sc_opened = 0; 47493071Swill return 0; 47569873Snsayer} 47669873Snsayer 47769873Snsayerstatic int 478130585Sphkspicread(struct cdev *dev, struct uio *uio, int flag) 47969873Snsayer{ 48093071Swill struct spic_softc *sc; 48169873Snsayer int l, s, error; 48269873Snsayer u_char buf[SCBUFLEN]; 48369873Snsayer 48493071Swill sc = devclass_get_softc(spic_devclass, 0); 48569873Snsayer 48669873Snsayer if (uio->uio_resid <= 0) /* What kind of a read is this?! */ 48769873Snsayer return 0; 48869873Snsayer 48969873Snsayer s = spltty(); 49069873Snsayer while (!(sc->sc_count)) { 49169873Snsayer sc->sc_sleeping=1; 492111748Sdes error = tsleep( sc, PZERO | PCATCH, "jogrea", 0); 49369873Snsayer sc->sc_sleeping=0; 49469873Snsayer if (error) { 49569873Snsayer splx(s); 49669873Snsayer return error; 49769873Snsayer } 49869873Snsayer } 49969873Snsayer splx(s); 50069873Snsayer 50169873Snsayer s = spltty(); 50269873Snsayer l = min(uio->uio_resid, sc->sc_count); 50369873Snsayer bcopy(sc->sc_buf, buf, l); 50469873Snsayer sc->sc_count -= l; 50569873Snsayer bcopy(sc->sc_buf + l, sc->sc_buf, l); 50669873Snsayer splx(s); 50769873Snsayer return uiomove(buf, l, uio); 50869873Snsayer 50969873Snsayer} 51069873Snsayer 51169873Snsayerstatic int 512130585Sphkspicioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td) 51369873Snsayer{ 51493071Swill struct spic_softc *sc; 51569873Snsayer 51693071Swill sc = devclass_get_softc(spic_devclass, 0); 51769873Snsayer 51869873Snsayer return EIO; 51969873Snsayer} 52069873Snsayer 52169873Snsayerstatic int 522130585Sphkspicpoll(struct cdev *dev, int events, struct thread *td) 52369873Snsayer{ 52493071Swill struct spic_softc *sc; 52593071Swill int revents = 0, s; 52669873Snsayer 52793071Swill sc = devclass_get_softc(spic_devclass, 0); 52893071Swill s = spltty(); 52993071Swill if (events & (POLLIN | POLLRDNORM)) { 53093071Swill if (sc->sc_count) 53193071Swill revents |= events & (POLLIN | POLLRDNORM); 53293071Swill else 53393071Swill selrecord(td, &sc->sc_rsel); /* Who shall we wake? */ 53493071Swill } 53593071Swill splx(s); 53669873Snsayer 53793071Swill return revents; 53869873Snsayer} 53969873Snsayer 54069873Snsayer 54169873Snsayerstatic device_method_t spic_methods[] = { 54269873Snsayer DEVMETHOD(device_probe, spic_probe), 54369873Snsayer DEVMETHOD(device_attach, spic_attach), 54469873Snsayer 54569873Snsayer { 0, 0 } 54669873Snsayer}; 54769873Snsayer 54869873Snsayerstatic driver_t spic_driver = { 54969873Snsayer "spic", 55069873Snsayer spic_methods, 55169873Snsayer sizeof(struct spic_softc), 55269873Snsayer}; 55369873Snsayer 55469873SnsayerDRIVER_MODULE(spic, isa, spic_driver, spic_devclass, 0, 0); 55569873Snsayer 556