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130 lines
3.8 KiB
C
130 lines
3.8 KiB
C
/* $NetBSD: ingenic_efuse.c,v 1.2 2015/10/08 18:20:31 macallan Exp $ */
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/*-
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* Copyright (c) 2015 Michael Lorenz
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: ingenic_efuse.c,v 1.2 2015/10/08 18:20:31 macallan Exp $");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/device.h>
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#include <sys/mutex.h>
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#include <sys/bus.h>
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#include <mips/ingenic/ingenic_var.h>
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#include <mips/ingenic/ingenic_regs.h>
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#include "opt_ingenic.h"
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static int ingenic_efuse_match(device_t, struct cfdata *, void *);
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static void ingenic_efuse_attach(device_t, device_t, void *);
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struct efuse_softc {
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device_t sc_dev;
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioh;
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uint8_t sc_data[0x20];
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};
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static void ingenic_efuse_read(struct efuse_softc *, int, int, uint8_t *);
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void ingenic_set_enaddr(uint8_t *);
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CFATTACH_DECL_NEW(ingenic_efuse, sizeof(struct efuse_softc),
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ingenic_efuse_match, ingenic_efuse_attach, NULL, NULL);
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/* ARGSUSED */
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static int
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ingenic_efuse_match(device_t parent, struct cfdata *match, void *aux)
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{
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struct apbus_attach_args *aa = aux;
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if (strcmp(aa->aa_name, "efuse") != 0)
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return 0;
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return 1;
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}
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/* ARGSUSED */
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static void
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ingenic_efuse_attach(device_t parent, device_t self, void *aux)
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{
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struct efuse_softc *sc = device_private(self);
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struct apbus_attach_args *aa = aux;
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int error;
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sc->sc_dev = self;
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sc->sc_iot = aa->aa_bst;
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if (aa->aa_addr == 0)
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aa->aa_addr = JZ_EFUSE;
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error = bus_space_map(aa->aa_bst, aa->aa_addr, 0x30, 0, &sc->sc_ioh);
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if (error) {
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aprint_error_dev(self,
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"can't map registers for %s: %d\n", aa->aa_name, error);
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return;
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}
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aprint_naive(": Ingenic EFUSE Slave Interface\n");
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aprint_normal(": Ingenic EFUSE Slave Interface\n");
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ingenic_efuse_read(sc, 8, 0x20, sc->sc_data);
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ingenic_set_enaddr(&sc->sc_data[0x1a]);
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#ifdef INGENIC_DEBUG
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{
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int i, j;
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for (i = 0; i < 0x20; i += 8) {
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printf("%02x:", i);
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for (j = 0; j < 8; j++)
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printf(" %02x", sc->sc_data[i + j]);
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printf("\n");
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}
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}
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#endif
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}
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static void
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ingenic_efuse_read(struct efuse_softc *sc, int addr, int len, uint8_t *buf)
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{
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uint32_t abuf;
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int i;
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bus_space_write_4(sc->sc_iot, sc->sc_ioh, JZ_EFUCFG, 0x00040000);
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bus_space_write_4(sc->sc_iot, sc->sc_ioh, JZ_EFUCTRL,
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JZ_EFUSE_READ |
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(addr << JZ_EFUSE_ADDR_SHIFT) |
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((len - 1) << JZ_EFUSE_SIZE_SHIFT));
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do {} while ((bus_space_read_4(sc->sc_iot, sc->sc_ioh, JZ_EFUSTATE) &
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JZ_EFUSE_RD_DONE) == 0);
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for (i = 0; i < len; i += 4) {
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abuf = bus_space_read_4(sc->sc_iot, sc->sc_ioh,
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JZ_EFUDATA0 + i);
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memcpy(buf, &abuf, 4);
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buf += 4;
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}
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} |