FreeBSD-5.3/sys/i386/isa/spic.c
/*
* Copyright (c) 2000 Nick Sayer
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* spic -- the Sony Programmable I/O Controller
*
* This device exists on most recent Sony laptops. It is the means by which
* you can watch the Jog Dial and some other functions.
*
* At the moment, this driver merely tries to turn the jog dial into a
* device that moused can park on, with the intent of supplying a Z axis
* and mouse button out of the jog dial. I suspect that this device will
* end up having to support at least 2 different minor devices: One to be
* the jog wheel device for moused to camp out on and the other to perform
* all of the other miscelaneous functions of this device. But for now,
* the jog wheel is all you get.
*
* At the moment, the data sent back by the device is rather primitive.
* It sends a single character per event:
* u = up, d = down -- that's the jog button
* l = left, r = right -- that's the dial.
* "left" and "right" are rather caprecious. They actually represent
* ccw and cw, respectively
*
* What documentation exists is thanks to Andrew Tridge, and his page at
* http://samba.org/picturebook/ Special thanks also to Ian Dowse, who
* also provided sample code upon which this driver was based.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/i386/isa/spic.c,v 1.15 2004/06/16 09:47:08 phk Exp $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/resource.h>
#include <isa/isavar.h>
#include <sys/poll.h>
#include <machine/pci_cfgreg.h>
#include <machine/clock.h>
#include <sys/tty.h>
#include <sys/conf.h>
#include <sys/fcntl.h>
#include <sys/malloc.h>
#include <sys/sysctl.h>
#include <sys/uio.h>
#include <i386/isa/spicreg.h>
static int spic_pollrate;
SYSCTL_INT(_machdep, OID_AUTO, spic_pollrate, CTLFLAG_RW, &spic_pollrate, 0, "")
;
devclass_t spic_devclass;
static d_open_t spicopen;
static d_close_t spicclose;
static d_read_t spicread;
static d_ioctl_t spicioctl;
static d_poll_t spicpoll;
static struct cdevsw spic_cdevsw = {
.d_version = D_VERSION,
.d_flags = D_NEEDGIANT,
.d_open = spicopen,
.d_close = spicclose,
.d_read = spicread,
.d_ioctl = spicioctl,
.d_poll = spicpoll,
.d_name = "spic",
};
#define SCBUFLEN 128
struct spic_softc {
u_int sc_port_addr;
u_char sc_intr;
struct resource *sc_port_res,*sc_intr_res;
int sc_port_rid,sc_intr_rid;
int sc_opened;
int sc_sleeping;
int sc_buttonlast;
struct callout_handle sc_timeout_ch;
device_t sc_dev;
struct selinfo sc_rsel;
u_char sc_buf[SCBUFLEN];
int sc_count;
int sc_model;
};
static void
write_port1(struct spic_softc *sc, u_char val)
{
DELAY(10);
outb(sc->sc_port_addr, val);
}
static void
write_port2(struct spic_softc *sc, u_char val)
{
DELAY(10);
outb(sc->sc_port_addr + 4, val);
}
static u_char
read_port1(struct spic_softc *sc)
{
DELAY(10);
return inb(sc->sc_port_addr);
}
static u_char
read_port2(struct spic_softc *sc)
{
DELAY(10);
return inb(sc->sc_port_addr + 4);
}
static u_char
read_port_cst(struct spic_softc *sc)
{
DELAY(10);
return inb(SPIC_CST_IOPORT);
}
static void
busy_wait(struct spic_softc *sc)
{
int i=0;
while(read_port2(sc) & 2) {
DELAY(10);
if (i++>10000) {
printf("spic busy wait abort\n");
return;
}
}
}
static void
busy_wait_cst(struct spic_softc *sc, int mask)
{
int i=0;
while(read_port_cst(sc) & mask) {
DELAY(10);
if (i++>10000) {
printf("spic busy wait abort\n");
return;
}
}
}
static u_char
spic_call1(struct spic_softc *sc, u_char dev) {
busy_wait(sc);
write_port2(sc, dev);
read_port2(sc);
return read_port1(sc);
}
static u_char
spic_call2(struct spic_softc *sc, u_char dev, u_char fn)
{
busy_wait(sc);
write_port2(sc, dev);
busy_wait(sc);
write_port1(sc, fn);
return read_port1(sc);
}
static void
spic_ecrset(struct spic_softc *sc, u_int16_t addr, u_int16_t value)
{
busy_wait_cst(sc, 3);
outb(SPIC_CST_IOPORT, 0x81);
busy_wait_cst(sc, 2);
outb(SPIC_DATA_IOPORT, addr);
busy_wait_cst(sc, 2);
outb(SPIC_DATA_IOPORT, value);
busy_wait_cst(sc, 2);
}
static void
spic_type2_srs(struct spic_softc *sc)
{
spic_ecrset(sc, SPIC_SHIB, (sc->sc_port_addr & 0xFF00) >> 8);
spic_ecrset(sc, SPIC_SLOB, sc->sc_port_addr & 0x00FF);
spic_ecrset(sc, SPIC_SIRQ, 0x00); /* using polling mode (IRQ=0)*/
DELAY(10);
}
static int
spic_probe(device_t dev)
{
struct spic_softc *sc;
u_char t, spic_irq;
sc = device_get_softc(dev);
/*
* We can only have 1 of these. Attempting to probe for a unit 1
* will destroy the work we did for unit 0
*/
if (device_get_unit(dev))
return ENXIO;
bzero(sc, sizeof(struct spic_softc));
if (!(sc->sc_port_res = bus_alloc_resource(dev, SYS_RES_IOPORT,
&sc->sc_port_rid, 0, ~0, 5, RF_ACTIVE))) {
device_printf(dev,"Couldn't map I/O\n");
return ENXIO;
}
sc->sc_port_addr = (u_short)rman_get_start(sc->sc_port_res);
#ifdef notyet
if (!(sc->sc_intr_res = bus_alloc_resource_any(dev, SYS_RES_IRQ,
&sc->sc_intr_rid, RF_ACTIVE))) {
device_printf(dev,"Couldn't map IRQ\n");
bus_release_resource(dev, SYS_RES_IOPORT,
sc->sc_port_rid, sc->sc_port_res);
return ENXIO;
}
sc->sc_intr = (u_short)rman_get_start(sc->sc_intr_res);
switch (sc->sc_intr) {
case 0: spic_irq = 3; break;
case 5: spic_irq = 0; break;
case 0xa: spic_irq = 1; break;
case 0xb: spic_irq = 2; break;
default: device_printf(dev,"Invalid IRQ\n");
bus_release_resource(dev, SYS_RES_IOPORT,
sc->sc_port_rid, sc->sc_port_res);
bus_release_resource(dev, SYS_RES_IRQ,
sc->sc_intr_rid, sc->sc_intr_res);
return ENXIO;
}
#else
spic_irq = 3;
#endif
#if 0
if (sc->sc_port_addr != 0x10A0) {
bus_release_resource(dev, SYS_RES_IOPORT,
sc->sc_port_rid, sc->sc_port_res);
bus_release_resource(dev, SYS_RES_IRQ,
sc->sc_intr_rid, sc->sc_intr_res);
return ENXIO;
}
#endif
/* PIIX4 chipset at least? */
if (pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, 0, 4) ==
PIIX4_DEVID) {
sc->sc_model = SPIC_DEVICE_MODEL_TYPE1;
} else {
/* For newer VAIOs (R505, SRX7, ...) */
sc->sc_model = SPIC_DEVICE_MODEL_TYPE2;
}
/*
* This is an ugly hack. It is necessary until ACPI works correctly.
*
* The SPIC consists of 2 registers. They are mapped onto I/O by the
* PIIX4's General Device 10 function. There is also an interrupt
* control port at a somewhat magic location, but this first pass is
* polled.
*
* So the first thing we need to do is map the G10 space in.
*
*/
/* Enable ACPI mode to get Fn key events */
/* XXX This may slow down your VAIO if ACPI is not supported in the kernel.
outb(0xb2, 0xf0);
*/
device_printf(dev,"device model type = %d\n", sc->sc_model);
if(sc->sc_model == SPIC_DEVICE_MODEL_TYPE1) {
pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10A,
sc->sc_port_addr, 2);
t = pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, 1);
t &= 0xf0;
t |= 4;
pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, t, 1);
outw(SPIC_IRQ_PORT, (inw(SPIC_IRQ_PORT) & ~(0x3 << SPIC_IRQ_SHIFT)) | (spic_irq << SPIC_IRQ_SHIFT));
t = pci_cfgregread(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, 1);
t &= 0x1f;
t |= 0xc0;
pci_cfgregwrite(PIIX4_BUS, PIIX4_SLOT, PIIX4_FUNC, G10L, t, 1);
} else {
spic_type2_srs(sc);
}
/*
* XXX: Should try and see if there's anything actually there.
*/
device_set_desc(dev, "Sony Programmable I/O Controller");
return 0;
}
static int
spic_attach(device_t dev)
{
struct spic_softc *sc;
sc = device_get_softc(dev);
sc->sc_dev = dev;
spic_pollrate = (hz/50); /* Every 50th of a second */
spic_call1(sc, 0x82);
spic_call2(sc, 0x81, 0xff);
spic_call1(sc, 0x92);
/* There can be only one */
make_dev(&spic_cdevsw, 0, 0, 0, 0600, "jogdial");
return 0;
}
static void
spictimeout(void *arg)
{
struct spic_softc *sc = arg;
u_char b, event, param;
int j;
if (!sc->sc_opened) {
device_printf(sc->sc_dev, "timeout called while closed!\n");
return;
}
event = read_port2(sc);
param = read_port1(sc);
if ((event != 4) && (!(event & 0x1)))
switch(event) {
case 0x10: /* jog wheel event (type1) */
if (sc->sc_model == SPIC_DEVICE_MODEL_TYPE1) {
b = !!(param & 0x40);
if (b != sc->sc_buttonlast) {
sc->sc_buttonlast = b;
sc->sc_buf[sc->sc_count++] =
b?'d':'u';
}
j = (param & 0xf) | ((param & 0x10)? ~0xf:0);
if (j<0)
while(j++!=0) {
sc->sc_buf[sc->sc_count++] =
'l';
}
else if (j>0)
while(j--!=0) {
sc->sc_buf[sc->sc_count++] =
'r';
}
}
break;
case 0x08: /* jog wheel event (type2) */
case 0x00:
/* SPIC_DEVICE_MODEL_TYPE2 returns jog wheel event=0x00 */
if (sc->sc_model == SPIC_DEVICE_MODEL_TYPE2) {
b = !!(param & 0x40);
if (b != sc->sc_buttonlast) {
sc->sc_buttonlast = b;
sc->sc_buf[sc->sc_count++] =
b?'d':'u';
}
j = (param & 0xf) | ((param & 0x10)? ~0xf:0);
if (j<0)
while(j++!=0) {
sc->sc_buf[sc->sc_count++] =
'l';
}
else if (j>0)
while(j--!=0) {
sc->sc_buf[sc->sc_count++] =
'r';
}
}
break;
case 0x60: /* Capture button */
printf("Capture button event: %x\n",param);
break;
case 0x30: /* Lid switch */
printf("Lid switch event: %x\n",param);
break;
case 0x0c: /* We must ignore these type of event for C1VP... */
case 0x70: /* Closing/Opening the lid on C1VP */
break;
default:
printf("Unknown event: event %02x param %02x\n", event, param);
break;
}
else {
/* No event. Wait some more */
sc->sc_timeout_ch = timeout(spictimeout, sc, spic_pollrate);
return;
}
if (sc->sc_count) {
if (sc->sc_sleeping) {
sc->sc_sleeping = 0;
wakeup( sc);
}
selwakeuppri(&sc->sc_rsel, PZERO);
}
spic_call2(sc, 0x81, 0xff); /* Clear event */
sc->sc_timeout_ch = timeout(spictimeout, sc, spic_pollrate);
}
static int
spicopen(struct cdev *dev, int flag, int fmt, struct thread *td)
{
struct spic_softc *sc;
sc = devclass_get_softc(spic_devclass, 0);
if (sc->sc_opened)
return EBUSY;
sc->sc_opened++;
sc->sc_count=0;
/* Start the polling */
timeout(spictimeout, sc, spic_pollrate);
return 0;
}
static int
spicclose(struct cdev *dev, int flag, int fmt, struct thread *td)
{
struct spic_softc *sc;
sc = devclass_get_softc(spic_devclass, 0);
/* Stop polling */
untimeout(spictimeout, sc, sc->sc_timeout_ch);
sc->sc_opened = 0;
return 0;
}
static int
spicread(struct cdev *dev, struct uio *uio, int flag)
{
struct spic_softc *sc;
int l, s, error;
u_char buf[SCBUFLEN];
sc = devclass_get_softc(spic_devclass, 0);
if (uio->uio_resid <= 0) /* What kind of a read is this?! */
return 0;
s = spltty();
while (!(sc->sc_count)) {
sc->sc_sleeping=1;
error = tsleep( sc, PZERO | PCATCH, "jogrea", 0);
sc->sc_sleeping=0;
if (error) {
splx(s);
return error;
}
}
splx(s);
s = spltty();
l = min(uio->uio_resid, sc->sc_count);
bcopy(sc->sc_buf, buf, l);
sc->sc_count -= l;
bcopy(sc->sc_buf + l, sc->sc_buf, l);
splx(s);
return uiomove(buf, l, uio);
}
static int
spicioctl(struct cdev *dev, u_long cmd, caddr_t addr, int flag, struct thread *td)
{
struct spic_softc *sc;
sc = devclass_get_softc(spic_devclass, 0);
return EIO;
}
static int
spicpoll(struct cdev *dev, int events, struct thread *td)
{
struct spic_softc *sc;
int revents = 0, s;
sc = devclass_get_softc(spic_devclass, 0);
s = spltty();
if (events & (POLLIN | POLLRDNORM)) {
if (sc->sc_count)
revents |= events & (POLLIN | POLLRDNORM);
else
selrecord(td, &sc->sc_rsel); /* Who shall we wake? */
}
splx(s);
return revents;
}
static device_method_t spic_methods[] = {
DEVMETHOD(device_probe, spic_probe),
DEVMETHOD(device_attach, spic_attach),
{ 0, 0 }
};
static driver_t spic_driver = {
"spic",
spic_methods,
sizeof(struct spic_softc),
};
DRIVER_MODULE(spic, isa, spic_driver, spic_devclass, 0, 0);