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The NAND Flash environment consists of several distinct components: - NAND framework (drivers harness for NAND controllers and NAND chips) - NAND simulator (NANDsim) - NAND file system (NAND FS) - Companion tools and utilities - Documentation (manual pages) This work is still experimental. Please use with caution. Obtained from: Semihalf Supported by: FreeBSD Foundation, Juniper Networks
237 lines
5.7 KiB
C
237 lines
5.7 KiB
C
/*-
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* Copyright (C) 2009-2012 Semihalf
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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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/* Integrated NAND controller driver */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/bus.h>
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#include <sys/conf.h>
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#include <sys/kernel.h>
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#include <sys/module.h>
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#include <sys/malloc.h>
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#include <sys/rman.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/time.h>
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#include <machine/bus.h>
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#include <machine/fdt.h>
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#include <arm/mv/mvvar.h>
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#include <arm/mv/mvwin.h>
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#include <dev/ofw/ofw_bus.h>
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#include <dev/ofw/ofw_bus_subr.h>
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#include <dev/nand/nand.h>
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#include <dev/nand/nandbus.h>
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#include "nfc_if.h"
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#define MV_NAND_DATA (0x00)
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#define MV_NAND_COMMAND (0x01)
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#define MV_NAND_ADDRESS (0x02)
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struct mv_nand_softc {
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struct nand_softc nand_dev;
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bus_space_handle_t sc_handle;
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bus_space_tag_t sc_tag;
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struct resource *res;
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int rid;
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};
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static int mv_nand_attach(device_t);
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static int mv_nand_probe(device_t);
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static int mv_nand_send_command(device_t, uint8_t);
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static int mv_nand_send_address(device_t, uint8_t);
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static uint8_t mv_nand_read_byte(device_t);
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static void mv_nand_read_buf(device_t, void *, uint32_t);
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static void mv_nand_write_buf(device_t, void *, uint32_t);
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static int mv_nand_select_cs(device_t, uint8_t);
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static int mv_nand_read_rnb(device_t);
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static device_method_t mv_nand_methods[] = {
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DEVMETHOD(device_probe, mv_nand_probe),
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DEVMETHOD(device_attach, mv_nand_attach),
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DEVMETHOD(nfc_send_command, mv_nand_send_command),
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DEVMETHOD(nfc_send_address, mv_nand_send_address),
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DEVMETHOD(nfc_read_byte, mv_nand_read_byte),
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DEVMETHOD(nfc_read_buf, mv_nand_read_buf),
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DEVMETHOD(nfc_write_buf, mv_nand_write_buf),
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DEVMETHOD(nfc_select_cs, mv_nand_select_cs),
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DEVMETHOD(nfc_read_rnb, mv_nand_read_rnb),
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{ 0, 0 },
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};
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static driver_t mv_nand_driver = {
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"nand",
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mv_nand_methods,
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sizeof(struct mv_nand_softc),
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};
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static devclass_t mv_nand_devclass;
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DRIVER_MODULE(mv_nand, localbus, mv_nand_driver, mv_nand_devclass, 0, 0);
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static int
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mv_nand_probe(device_t dev)
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{
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if (!ofw_bus_is_compatible(dev, "mrvl,nfc"))
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return (ENXIO);
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device_set_desc(dev, "Marvell NAND controller");
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return (BUS_PROBE_DEFAULT);
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}
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static int
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mv_nand_attach(device_t dev)
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{
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struct mv_nand_softc *sc;
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int err;
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sc = device_get_softc(dev);
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sc->res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &sc->rid,
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RF_ACTIVE);
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if (sc->res == NULL) {
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device_printf(dev, "could not allocate resources!\n");
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return (ENXIO);
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}
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sc->sc_tag = rman_get_bustag(sc->res);
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sc->sc_handle = rman_get_bushandle(sc->res);
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nand_init(&sc->nand_dev, dev, NAND_ECC_SOFT, 0, 0, NULL, NULL);
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err = nandbus_create(dev);
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return (err);
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}
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static int
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mv_nand_send_command(device_t dev, uint8_t command)
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{
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struct mv_nand_softc *sc;
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nand_debug(NDBG_DRV,"mv_nand: send command %x", command);
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sc = device_get_softc(dev);
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bus_space_write_1(sc->sc_tag, sc->sc_handle, MV_NAND_COMMAND, command);
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return (0);
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}
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static int
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mv_nand_send_address(device_t dev, uint8_t addr)
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{
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struct mv_nand_softc *sc;
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nand_debug(NDBG_DRV,"mv_nand: send address %x", addr);
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sc = device_get_softc(dev);
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bus_space_write_1(sc->sc_tag, sc->sc_handle, MV_NAND_ADDRESS, addr);
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return (0);
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}
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static uint8_t
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mv_nand_read_byte(device_t dev)
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{
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struct mv_nand_softc *sc;
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uint8_t data;
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sc = device_get_softc(dev);
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data = bus_space_read_1(sc->sc_tag, sc->sc_handle, MV_NAND_DATA);
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nand_debug(NDBG_DRV,"mv_nand: read %x", data);
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return (data);
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}
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static void
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mv_nand_read_buf(device_t dev, void* buf, uint32_t len)
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{
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struct mv_nand_softc *sc;
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int i;
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uint8_t *b = (uint8_t*)buf;
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sc = device_get_softc(dev);
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for (i = 0; i < len; i++) {
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b[i] = bus_space_read_1(sc->sc_tag, sc->sc_handle,
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MV_NAND_DATA);
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#ifdef NAND_DEBUG
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if (!(i % 16))
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printf("%s", i == 0 ? "mv_nand:\n" : "\n");
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printf(" %x", b[i]);
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if (i == len - 1)
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printf("\n");
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#endif
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}
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}
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static void
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mv_nand_write_buf(device_t dev, void* buf, uint32_t len)
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{
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struct mv_nand_softc *sc;
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int i;
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uint8_t *b = (uint8_t*)buf;
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sc = device_get_softc(dev);
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for (i = 0; i < len; i++) {
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#ifdef NAND_DEBUG
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if (!(i % 16))
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printf("%s", i == 0 ? "mv_nand:\n" : "\n");
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printf(" %x", b[i]);
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if (i == len - 1)
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printf("\n");
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#endif
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bus_space_write_1(sc->sc_tag, sc->sc_handle, MV_NAND_DATA,
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b[i]);
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}
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}
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static int
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mv_nand_select_cs(device_t dev, uint8_t cs)
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{
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if (cs > 0)
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return (ENODEV);
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return (0);
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}
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static int
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mv_nand_read_rnb(device_t dev)
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{
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/* no-op */
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return (0); /* ready */
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}
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