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/* $OpenBSD: qcsdam.c,v 1.1 2023/07/22 22:43:53 patrick Exp $ */
/*
* Copyright (c) 2023 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/device.h>
#include <machine/bus.h>
#include <machine/fdt.h>
#include <dev/fdt/spmivar.h>
#include <dev/ofw/openfirm.h>
#include <dev/ofw/ofw_misc.h>
#include <dev/ofw/fdt.h>
struct qcsdam_softc {
struct device sc_dev;
spmi_tag_t sc_tag;
int8_t sc_sid;
uint16_t sc_addr;
struct nvmem_device sc_nd;
};
int qcsdam_match(struct device *, void *, void *);
void qcsdam_attach(struct device *, struct device *, void *);
const struct cfattach qcsdam_ca = {
sizeof (struct qcsdam_softc), qcsdam_match, qcsdam_attach
};
struct cfdriver qcsdam_cd = {
NULL, "qcsdam", DV_DULL
};
int qcsdam_nvmem_read(void *, bus_addr_t, void *, bus_size_t);
int qcsdam_nvmem_write(void *, bus_addr_t, const void *, bus_size_t);
int
qcsdam_match(struct device *parent, void *match, void *aux)
{
struct spmi_attach_args *saa = aux;
return OF_is_compatible(saa->sa_node, "qcom,spmi-sdam");
}
void
qcsdam_attach(struct device *parent, struct device *self, void *aux)
{
struct qcsdam_softc *sc = (struct qcsdam_softc *)self;
struct spmi_attach_args *saa = aux;
uint32_t reg;
if (OF_getpropintarray(saa->sa_node, "reg",
®, sizeof(reg)) != sizeof(reg)) {
printf(": can't find registers\n");
return;
}
sc->sc_tag = saa->sa_tag;
sc->sc_sid = saa->sa_sid;
sc->sc_addr = reg;
printf("\n");
sc->sc_nd.nd_node = saa->sa_node;
sc->sc_nd.nd_cookie = sc;
sc->sc_nd.nd_read = qcsdam_nvmem_read;
sc->sc_nd.nd_write = qcsdam_nvmem_write;
nvmem_register(&sc->sc_nd);
}
int
qcsdam_nvmem_read(void *cookie, bus_addr_t addr, void *data, bus_size_t size)
{
struct qcsdam_softc *sc = cookie;
int error;
error = spmi_cmd_read(sc->sc_tag, sc->sc_sid, SPMI_CMD_EXT_READL,
sc->sc_addr + addr, data, size);
if (error) {
printf("%s: error reading NVMEM\n", sc->sc_dev.dv_xname);
return error;
}
return 0;
}
int
qcsdam_nvmem_write(void *cookie, bus_addr_t addr, const void *data,
bus_size_t size)
{
struct qcsdam_softc *sc = cookie;
int error;
error = spmi_cmd_write(sc->sc_tag, sc->sc_sid, SPMI_CMD_EXT_WRITEL,
sc->sc_addr + addr, data, size);
if (error) {
printf("%s: error reading NVMEM\n", sc->sc_dev.dv_xname);
return error;
}
return 0;
}
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