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/* $OpenBSD: wbsio.c,v 1.4 2008/04/08 18:48:43 kettenis Exp $ */
/*
* Copyright (c) 2008 Mark Kettenis <kettenis@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* Winbond LPC Super I/O driver.
*/
#include <sys/param.h>
#include <sys/device.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <machine/bus.h>
#include <dev/isa/isareg.h>
#include <dev/isa/isavar.h>
/* ISA bus registers */
#define WBSIO_INDEX 0x00 /* Configuration Index Register */
#define WBSIO_DATA 0x01 /* Configuration Data Register */
#define WBSIO_IOSIZE 0x02 /* ISA I/O space size */
#define WBSIO_CONF_EN_MAGIC 0x87 /* enable configuration mode */
#define WBSIO_CONF_DS_MAGIC 0xaa /* disable configuration mode */
/* Configuration Space Registers */
#define WBSIO_LDN 0x07 /* Logical Device Number */
#define WBSIO_ID 0x20 /* Device ID */
#define WBSIO_REV 0x21 /* Device Revision */
#define WBSIO_ID_W83627HF 0x52
#define WBSIO_ID_W83627THF 0x82
#define WBSIO_ID_W83627EHF 0x88
#define WBSIO_ID_W83627DHG 0xa0
#define WBSIO_ID_W83627SF 0x59
#define WBSIO_ID_W83637HF 0x70
#define WBSIO_ID_W83697HF 0x60
/* Logical Device Number (LDN) Assignments */
#define WBSIO_LDN_HM 0x0b
/* Hardware Monitor Control Registers (LDN B) */
#define WBSIO_HM_ADDR_MSB 0x60 /* Address [15:8] */
#define WBSIO_HM_ADDR_LSB 0x61 /* Address [7:0] */
#ifdef WBSIO_DEBUG
#define DPRINTF(x) printf x
#else
#define DPRINTF(x)
#endif
struct wbsio_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
};
int wbsio_probe(struct device *, void *, void *);
void wbsio_attach(struct device *, struct device *, void *);
int wbsio_print(void *, const char *);
struct cfattach wbsio_ca = {
sizeof(struct wbsio_softc),
wbsio_probe,
wbsio_attach
};
struct cfdriver wbsio_cd = {
NULL, "wbsio", DV_DULL
};
static __inline void
wbsio_conf_enable(bus_space_tag_t iot, bus_space_handle_t ioh)
{
bus_space_write_1(iot, ioh, WBSIO_INDEX, WBSIO_CONF_EN_MAGIC);
bus_space_write_1(iot, ioh, WBSIO_INDEX, WBSIO_CONF_EN_MAGIC);
}
static __inline void
wbsio_conf_disable(bus_space_tag_t iot, bus_space_handle_t ioh)
{
bus_space_write_1(iot, ioh, WBSIO_INDEX, WBSIO_CONF_DS_MAGIC);
}
static __inline u_int8_t
wbsio_conf_read(bus_space_tag_t iot, bus_space_handle_t ioh, u_int8_t index)
{
bus_space_write_1(iot, ioh, WBSIO_INDEX, index);
return (bus_space_read_1(iot, ioh, WBSIO_DATA));
}
static __inline void
wbsio_conf_write(bus_space_tag_t iot, bus_space_handle_t ioh, u_int8_t index,
u_int8_t data)
{
bus_space_write_1(iot, ioh, WBSIO_INDEX, index);
bus_space_write_1(iot, ioh, WBSIO_DATA, data);
}
int
wbsio_probe(struct device *parent, void *match, void *aux)
{
struct isa_attach_args *ia = aux;
bus_space_tag_t iot;
bus_space_handle_t ioh;
u_int8_t reg;
/* Match by device ID */
iot = ia->ia_iot;
if (bus_space_map(iot, ia->ipa_io[0].base, WBSIO_IOSIZE, 0, &ioh))
return (0);
wbsio_conf_enable(iot, ioh);
reg = wbsio_conf_read(iot, ioh, WBSIO_ID);
DPRINTF(("wbsio_probe: id 0x%02x\n", reg));
wbsio_conf_disable(iot, ioh);
bus_space_unmap(iot, ioh, WBSIO_IOSIZE);
switch (reg) {
case WBSIO_ID_W83627HF:
case WBSIO_ID_W83627THF:
case WBSIO_ID_W83627EHF:
case WBSIO_ID_W83627DHG:
case WBSIO_ID_W83637HF:
case WBSIO_ID_W83697HF:
ia->ipa_nio = 1;
ia->ipa_io[0].length = WBSIO_IOSIZE;
ia->ipa_nmem = 0;
ia->ipa_nirq = 0;
ia->ipa_ndrq = 0;
return (1);
}
return (0);
}
void
wbsio_attach(struct device *parent, struct device *self, void *aux)
{
struct wbsio_softc *sc = (void *)self;
struct isa_attach_args *ia = aux;
struct isa_attach_args nia;
u_int8_t reg, reg0, reg1;
u_int16_t iobase;
/* Map ISA I/O space */
sc->sc_iot = ia->ia_iot;
if (bus_space_map(sc->sc_iot, ia->ipa_io[0].base,
WBSIO_IOSIZE, 0, &sc->sc_ioh)) {
printf(": can't map I/O space\n");
return;
}
/* Enter configuration mode */
wbsio_conf_enable(sc->sc_iot, sc->sc_ioh);
/* Read device ID */
reg = wbsio_conf_read(sc->sc_iot, sc->sc_ioh, WBSIO_ID);
switch (reg) {
case WBSIO_ID_W83627HF:
printf(": W83627HF");
break;
case WBSIO_ID_W83627THF:
printf(": W83627THF");
break;
case WBSIO_ID_W83627EHF:
printf(": W83627EHF");
break;
case WBSIO_ID_W83627DHG:
printf(": W83627DHG");
break;
case WBSIO_ID_W83637HF:
printf(": W83637HF");
break;
case WBSIO_ID_W83697HF:
printf(": W83697HF");
break;
}
/* Read device revision */
reg = wbsio_conf_read(sc->sc_iot, sc->sc_ioh, WBSIO_REV);
printf(" rev 0x%02x", reg);
/* Select HM logical device */
wbsio_conf_write(sc->sc_iot, sc->sc_ioh, WBSIO_LDN, WBSIO_LDN_HM);
/*
* The address should be 8-byte aligned, but it seems some
* BIOSes ignore this. They get away with it, because
* Apparently the hardware simply ignores the lower three
* bits. We do the same here.
*/
reg0 = wbsio_conf_read(sc->sc_iot, sc->sc_ioh, WBSIO_HM_ADDR_LSB);
reg1 = wbsio_conf_read(sc->sc_iot, sc->sc_ioh, WBSIO_HM_ADDR_MSB);
iobase = (reg1 << 8) | (reg0 & ~0x7);
printf("\n");
/* Escape from configuration mode */
wbsio_conf_disable(sc->sc_iot, sc->sc_ioh);
if (iobase == 0)
return;
nia = *ia;
nia.ia_iobase = iobase;
config_found(self, &nia, wbsio_print);
}
int
wbsio_print(void *aux, const char *pnp)
{
struct isa_attach_args *ia = aux;
if (pnp)
printf("%s", pnp);
if (ia->ia_iosize)
printf(" port 0x%x", ia->ia_iobase);
if (ia->ia_iosize > 1)
printf("/%d", ia->ia_iosize);
return (UNCONF);
}
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