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/* $OpenBSD: sili.c,v 1.10 2007/04/05 10:15:27 dlg Exp $ */
/*
* Copyright (c) 2007 David Gwynne <dlg@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.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/buf.h>
#include <sys/device.h>
#include <sys/proc.h>
#include <sys/malloc.h>
#include <sys/kernel.h>
#include <machine/bus.h>
#include <dev/ata/atascsi.h>
#include <dev/ic/silireg.h>
#include <dev/ic/silivar.h>
#define SILI_DEBUG
#ifdef SILI_DEBUG
#define SILI_D_VERBOSE (1<<0)
int silidebug = SILI_D_VERBOSE;
#define DPRINTF(m, a...) do { if ((m) & silidebug) printf(a); } while (0)
#else
#define DPRINTF(m, a...)
#endif
struct cfdriver sili_cd = {
NULL, "sili", DV_DULL
};
struct sili_port {
struct sili_softc *sp_sc;
bus_space_handle_t sp_ioh;
};
int sili_ports_alloc(struct sili_softc *);
void sili_ports_free(struct sili_softc *);
u_int32_t sili_read(struct sili_softc *, bus_size_t);
void sili_write(struct sili_softc *, bus_size_t, u_int32_t);
u_int32_t sili_pread(struct sili_port *, bus_size_t);
void sili_pwrite(struct sili_port *, bus_size_t, u_int32_t);
int sili_pwait_eq(struct sili_port *, bus_size_t,
u_int32_t, u_int32_t, int);
int sili_pwait_ne(struct sili_port *, bus_size_t,
u_int32_t, u_int32_t, int);
void sili_post_direct(struct sili_port *, u_int,
void *, size_t buflen);
/* atascsi interface */
int sili_ata_probe(void *, int);
struct ata_xfer *sili_ata_get_xfer(void *, int);
void sili_ata_put_xfer(struct ata_xfer *);
int sili_ata_cmd(struct ata_xfer *);
struct atascsi_methods sili_atascsi_methods = {
sili_ata_probe,
sili_ata_get_xfer,
sili_ata_cmd
};
int
sili_attach(struct sili_softc *sc)
{
struct atascsi_attach_args aaa;
printf("\n");
if (sili_ports_alloc(sc) != 0) {
/* error already printed by sili_port_alloc */
return (1);
}
/* bounce the controller */
sili_write(sc, SILI_REG_GC, SILI_REG_GC_GR);
sili_write(sc, SILI_REG_GC, 0x0);
bzero(&aaa, sizeof(aaa));
aaa.aaa_cookie = sc;
aaa.aaa_methods = &sili_atascsi_methods;
aaa.aaa_minphys = minphys;
aaa.aaa_nports = sc->sc_nports;
aaa.aaa_ncmds = SILI_MAX_CMDS;
sc->sc_atascsi = atascsi_attach(&sc->sc_dev, &aaa);
return (0);
}
int
sili_detach(struct sili_softc *sc, int flags)
{
return (0);
}
int
sili_intr(void *arg)
{
#if 0
struct sili_softc *sc = arg;
#endif
return (0);
}
int
sili_ports_alloc(struct sili_softc *sc)
{
struct sili_port *sp;
int i;
sc->sc_ports = malloc(sizeof(struct sili_port) * sc->sc_nports,
M_DEVBUF, M_WAITOK);
bzero(sc->sc_ports, sizeof(struct sili_port) * sc->sc_nports);
for (i = 0; i < sc->sc_nports; i++) {
sp = &sc->sc_ports[i];
sp->sp_sc = sc;
if (bus_space_subregion(sc->sc_iot_port, sc->sc_ioh_port,
SILI_PORT_OFFSET(i), SILI_PORT_SIZE, &sp->sp_ioh) != 0) {
printf("%s: unable to create register window "
"for port %d\n", DEVNAME(sc), i);
goto freeports;
}
}
return (0);
freeports:
/* bus_space(9) says subregions dont have to be freed */
free(sp, M_DEVBUF);
sc->sc_ports = NULL;
return (1);
}
void
sili_ports_free(struct sili_softc *sc)
{
/* bus_space(9) says subregions dont have to be freed */
free(sc->sc_ports, M_DEVBUF);
sc->sc_ports = NULL;
}
u_int32_t
sili_read(struct sili_softc *sc, bus_size_t r)
{
u_int32_t rv;
bus_space_barrier(sc->sc_iot_global, sc->sc_ioh_global, r, 4,
BUS_SPACE_BARRIER_READ);
rv = bus_space_read_4(sc->sc_iot_global, sc->sc_ioh_global, r);
return (rv);
}
void
sili_write(struct sili_softc *sc, bus_size_t r, u_int32_t v)
{
bus_space_write_4(sc->sc_iot_global, sc->sc_ioh_global, r, v);
bus_space_barrier(sc->sc_iot_global, sc->sc_ioh_global, r, 4,
BUS_SPACE_BARRIER_WRITE);
}
u_int32_t
sili_pread(struct sili_port *sp, bus_size_t r)
{
u_int32_t rv;
bus_space_barrier(sp->sp_sc->sc_iot_port, sp->sp_ioh, r, 4,
BUS_SPACE_BARRIER_READ);
rv = bus_space_read_4(sp->sp_sc->sc_iot_port, sp->sp_ioh, r);
return (rv);
}
void
sili_pwrite(struct sili_port *sp, bus_size_t r, u_int32_t v)
{
bus_space_write_4(sp->sp_sc->sc_iot_port, sp->sp_ioh, r, v);
bus_space_barrier(sp->sp_sc->sc_iot_port, sp->sp_ioh, r, 4,
BUS_SPACE_BARRIER_WRITE);
}
int
sili_pwait_eq(struct sili_port *sp, bus_size_t r, u_int32_t mask,
u_int32_t value, int timeout)
{
while ((sili_pread(sp, r) & mask) != value) {
if (timeout == 0)
return (0);
delay(1000);
timeout--;
}
return (1);
}
int
sili_pwait_ne(struct sili_port *sp, bus_size_t r, u_int32_t mask,
u_int32_t value, int timeout)
{
while ((sili_pread(sp, r) & mask) == value) {
if (timeout == 0)
return (0);
delay(1000);
timeout--;
}
return (1);
}
void
sili_post_direct(struct sili_port *sp, u_int slot, void *buf, size_t buflen)
{
bus_size_t r = SILI_PREG_SLOT(slot);
#ifdef DIAGNOSTIC
if (buflen != 64 && buflen != 128)
panic("sili_pcopy: buflen of %d is not 64 or 128", buflen);
#endif
bus_space_write_raw_region_4(sp->sp_sc->sc_iot_port, sp->sp_ioh, r,
buf, buflen);
bus_space_barrier(sp->sp_sc->sc_iot_port, sp->sp_ioh, r, buflen,
BUS_SPACE_BARRIER_WRITE);
sili_pwrite(sp, SILI_PREG_FIFO, slot);
}
int
sili_ata_probe(void *xsc, int port)
{
struct sili_softc *sc = xsc;
struct sili_port *sp = &sc->sc_ports[port];
sili_pwrite(sp, SILI_PREG_PCC, SILI_PREG_PCC_PORTRESET);
sili_pwrite(sp, SILI_PREG_PCS, SILI_PREG_PCS_A32B);
if (!sili_pwait_eq(sp, SILI_PREG_SSTS, SATA_SStatus_DET,
SATA_SStatus_DET_DEV, 1000))
return (ATA_PORT_T_NONE);
printf("%s.%d: SSTS 0x%08x\n", DEVNAME(sc), port,
sili_pread(sp, SILI_PREG_SSTS));
return (ATA_PORT_T_NONE);
}
int
sili_ata_cmd(struct ata_xfer *xa)
{
return (ATA_ERROR);
}
struct ata_xfer *
sili_ata_get_xfer(void *xsc, int port)
{
return (NULL);
}
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