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/* $OpenBSD: moxtet.c,v 1.2 2021/10/24 17:52:26 mpi Exp $ */
/*
* Copyright (c) 2019 Patrick Wildt <patrick@blueri.se>
*
* 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/kernel.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <dev/spi/spivar.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_gpio.h>
#include <dev/ofw/ofw_pinctrl.h>
#define MOX_NMODULE 10
#define MOX_CPU_EMMC 0x00
#define MOX_CPU_SD 0x10
#define MOX_MODULE_SFP 0x01
#define MOX_MODULE_PCI 0x02
#define MOX_MODULE_TOPAZ 0x03
#define MOX_MODULE_PERIDOT 0x04
#define MOX_MODULE_USB3 0x05
#define MOX_MODULE_PASSPCI 0x06
struct moxtet_softc {
struct device sc_dev;
int sc_node;
spi_tag_t sc_spi_tag;
struct spi_config sc_spi_conf;
int sc_nmodule;
};
int moxtet_match(struct device *, void *, void *);
void moxtet_attach(struct device *, struct device *, void *);
int moxtet_detach(struct device *, int);
int moxtet_read(struct moxtet_softc *, char *, size_t);
int moxtet_write(struct moxtet_softc *, char *, size_t);
const struct cfattach moxtet_ca = {
sizeof(struct moxtet_softc), moxtet_match, moxtet_attach, moxtet_detach
};
struct cfdriver moxtet_cd = {
NULL, "moxtet", DV_DULL
};
int
moxtet_match(struct device *parent, void *match, void *aux)
{
struct spi_attach_args *sa = aux;
if (strcmp(sa->sa_name, "cznic,moxtet") == 0)
return 1;
return 0;
}
void
moxtet_attach(struct device *parent, struct device *self, void *aux)
{
struct moxtet_softc *sc = (struct moxtet_softc *)self;
struct spi_attach_args *sa = aux;
uint8_t buf[MOX_NMODULE];
int i;
sc->sc_spi_tag = sa->sa_tag;
sc->sc_node = *(int *)sa->sa_cookie;
pinctrl_byname(sc->sc_node, "default");
sc->sc_spi_conf.sc_bpw = 8;
sc->sc_spi_conf.sc_freq = OF_getpropint(sc->sc_node,
"spi-max-frequency", 0);
sc->sc_spi_conf.sc_cs = OF_getpropint(sc->sc_node, "reg", 0);
if (OF_getproplen(sc->sc_node, "spi-cpol") == 0)
sc->sc_spi_conf.sc_flags |= SPI_CONFIG_CPOL;
if (OF_getproplen(sc->sc_node, "spi-cpha") == 0)
sc->sc_spi_conf.sc_flags |= SPI_CONFIG_CPHA;
if (OF_getproplen(sc->sc_node, "spi-cs-high") == 0)
sc->sc_spi_conf.sc_flags |= SPI_CONFIG_CS_HIGH;
if (moxtet_read(sc, buf, sizeof(buf))) {
printf(": can't read moxtet\n");
return;
}
if (buf[0] == MOX_CPU_EMMC)
printf(": eMMC");
else if (buf[0] == MOX_CPU_SD)
printf(": SD");
else {
printf(": unknown\n");
return;
}
for (i = 1; i < MOX_NMODULE; i++) {
if (buf[i] == 0xff)
break;
sc->sc_nmodule++;
switch (buf[i] & 0xf) {
case MOX_MODULE_SFP:
printf(", SFP");
break;
case MOX_MODULE_PCI:
printf(", mPCIe");
break;
case MOX_MODULE_TOPAZ:
printf(", 4x GbE");
break;
case MOX_MODULE_PERIDOT:
printf(", 8x GbE");
break;
case MOX_MODULE_USB3:
printf(", 4x USB 3.0");
break;
case MOX_MODULE_PASSPCI:
printf(", mPCIe (passthrough)");
break;
default:
printf(", unknown (0x%02x)", buf[i] & 0xf);
break;
}
}
printf("\n");
}
int
moxtet_detach(struct device *self, int flags)
{
return 0;
}
int
moxtet_read(struct moxtet_softc *sc, char *buf, size_t len)
{
int error;
spi_acquire_bus(sc->sc_spi_tag, 0);
spi_config(sc->sc_spi_tag, &sc->sc_spi_conf);
error = spi_read(sc->sc_spi_tag, buf, len);
spi_release_bus(sc->sc_spi_tag, 0);
return error;
}
int
moxtet_write(struct moxtet_softc *sc, char *buf, size_t len)
{
int error;
spi_acquire_bus(sc->sc_spi_tag, 0);
spi_config(sc->sc_spi_tag, &sc->sc_spi_conf);
error = spi_write(sc->sc_spi_tag, buf, len);
spi_release_bus(sc->sc_spi_tag, 0);
return error;
}
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