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/* $OpenBSD: octsctl.c,v 1.2 2019/01/12 13:50:52 visa Exp $ */
/*
* Copyright (c) 2017 Visa Hankala
*
* 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.
*/
/*
* Driver for OCTEON SATA controller bridge.
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/device.h>
#include <machine/bus.h>
#include <machine/fdt.h>
#include <dev/ofw/fdt.h>
#include <dev/ofw/openfirm.h>
#define SCTL_SHIM_CFG 0xe8
#define SCTL_SHIM_CFG_READ_CMD 0x0000000000001000ul
#define SCTL_SHIM_CFG_DMA_BYTE_SWAP 0x0000000000000300ul
#define SCTL_SHIM_CFG_DMA_BYTE_SWAP_SHIFT 8
#define SCTL_SHIM_CFG_CSR_BYTE_SWAP 0x0000000000000003ul
#define SCTL_SHIM_CFG_CSR_BYTE_SWAP_SHIFT 0
struct octsctl_softc {
struct device sc_dev;
bus_space_tag_t sc_iot;
bus_space_handle_t sc_ioh;
};
int octsctl_match(struct device *, void *, void *);
void octsctl_attach(struct device *, struct device *, void *);
const struct cfattach octsctl_ca = {
sizeof(struct octsctl_softc), octsctl_match, octsctl_attach
};
struct cfdriver octsctl_cd = {
NULL, "octsctl", DV_DULL
};
int
octsctl_match(struct device *parent, void *match, void *aux)
{
struct fdt_attach_args *faa = aux;
return OF_is_compatible(faa->fa_node, "cavium,octeon-7130-sata-uctl");
}
void
octsctl_attach(struct device *parent, struct device *self, void *aux)
{
struct fdt_reg child_reg;
struct fdt_attach_args child_faa;
struct fdt_attach_args *faa = aux;
struct octsctl_softc *sc = (struct octsctl_softc *)self;
uint64_t val;
uint32_t reg[4];
int child;
child = OF_child(faa->fa_node);
/*
* On some machines, the bridge controller node does not have
* an AHCI controller node as a child.
*/
if (child == 0) {
printf(": disabled\n");
return;
}
if (faa->fa_nreg != 1) {
printf(": expected one IO space, got %d\n", faa->fa_nreg);
return;
}
if (OF_getpropint(faa->fa_node, "#address-cells", 0) != 2 ||
OF_getpropint(faa->fa_node, "#size-cells", 0) != 2) {
printf(": invalid fdt reg cells\n");
return;
}
if (OF_getproplen(child, "reg") != sizeof(reg)) {
printf(": invalid child fdt reg\n");
return;
}
OF_getpropintarray(child, "reg", reg, sizeof(reg));
child_reg.addr = ((uint64_t)reg[0] << 32) | reg[1];
child_reg.size = ((uint64_t)reg[2] << 32) | reg[3];
sc->sc_iot = faa->fa_iot;
if (bus_space_map(sc->sc_iot, faa->fa_reg[0].addr, faa->fa_reg[0].size,
0, &sc->sc_ioh)) {
printf(": could not map registers\n");
goto error;
}
val = bus_space_read_8(sc->sc_iot, sc->sc_ioh, SCTL_SHIM_CFG);
val &= ~SCTL_SHIM_CFG_CSR_BYTE_SWAP;
val &= ~SCTL_SHIM_CFG_DMA_BYTE_SWAP;
val |= 3ul << SCTL_SHIM_CFG_CSR_BYTE_SWAP_SHIFT;
val |= 1ul << SCTL_SHIM_CFG_DMA_BYTE_SWAP_SHIFT;
val |= SCTL_SHIM_CFG_READ_CMD;
bus_space_write_8(sc->sc_iot, sc->sc_ioh, SCTL_SHIM_CFG, val);
(void)bus_space_read_8(sc->sc_iot, sc->sc_ioh, SCTL_SHIM_CFG);
printf("\n");
memset(&child_faa, 0, sizeof(child_faa));
child_faa.fa_name = "";
child_faa.fa_node = child;
child_faa.fa_iot = faa->fa_iot;
child_faa.fa_dmat = faa->fa_dmat;
child_faa.fa_reg = &child_reg;
child_faa.fa_nreg = 1;
/* child_faa.fa_intr is not utilized. */
config_found(self, &child_faa, NULL);
return;
error:
if (sc->sc_ioh != 0)
bus_space_unmap(sc->sc_iot, sc->sc_ioh, faa->fa_reg[0].size);
}
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