mirror of https://github.com/F-Stack/f-stack.git
141 lines
3.9 KiB
C
141 lines
3.9 KiB
C
/*-
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* Copyright (c) 2003-2009 RMI Corporation
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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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* 3. Neither the name of RMI Corporation, nor the names of its contributors,
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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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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* RMI_BSD */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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/*
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* reading eeprom for the mac address .
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*/
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/kernel.h>
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#include <sys/lock.h>
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#include <sys/module.h>
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#include <sys/mutex.h>
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#include <sys/bus.h>
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#include <sys/resource.h>
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#include <sys/rman.h>
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#include <sys/sysctl.h>
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#include <machine/bus.h>
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#include <machine/cpu.h>
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#include <machine/cpufunc.h>
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#include <machine/frame.h>
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#include <machine/resource.h>
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#include <dev/iicbus/iiconf.h>
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#include <dev/iicbus/iicbus.h>
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#include "iicbus_if.h"
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#define AT24CO_EEPROM_ETH_MACADDR 0x20
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struct at24co2n_softc {
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uint32_t sc_addr;
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device_t sc_dev;
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uint8_t sc_mac_addr[6];
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};
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static void at24co2n_read_mac(struct at24co2n_softc *);
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static int
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at24co2n_probe(device_t dev)
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{
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device_set_desc(dev, "AT24Co2N-10SE-2.7 EEPROM for mac address");
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return (0);
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}
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static int
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at24co2n_mac_sysctl(SYSCTL_HANDLER_ARGS)
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{
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struct at24co2n_softc *sc = arg1;
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char buf[24];
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int len;
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uint8_t *p;
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at24co2n_read_mac(sc);
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p = sc->sc_mac_addr;
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len = snprintf(buf, sizeof(buf), "%02x:%02x:%02x:%02x:%02x:%02x",
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p[0], p[1], p[2], p[3], p[4], p[5]);
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return SYSCTL_OUT_STR(req, buf);
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}
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static int
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at24co2n_attach(device_t dev)
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{
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struct at24co2n_softc *sc = device_get_softc(dev);
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struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(dev);
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struct sysctl_oid *tree = device_get_sysctl_tree(dev);
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if(sc == NULL) {
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printf("at24co2n_attach device_get_softc failed\n");
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return (0);
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}
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sc->sc_dev = dev;
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sc->sc_addr = iicbus_get_addr(dev);
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SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
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"eeprom-mac", CTLTYPE_STRING | CTLFLAG_RD, sc, 0,
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at24co2n_mac_sysctl, "A", "mac address");
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return (0);
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}
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static void
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at24co2n_read_mac(struct at24co2n_softc *sc)
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{
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uint8_t addr = AT24CO_EEPROM_ETH_MACADDR;
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struct iic_msg msgs[2] = {
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{ sc->sc_addr, IIC_M_WR, 1, &addr },
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{ sc->sc_addr, IIC_M_RD, 6, sc->sc_mac_addr},
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};
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iicbus_transfer(sc->sc_dev, msgs, 2);
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}
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static device_method_t at24co2n_methods[] = {
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DEVMETHOD(device_probe, at24co2n_probe),
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DEVMETHOD(device_attach, at24co2n_attach),
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{0, 0},
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};
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static driver_t at24co2n_driver = {
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"at24co2n",
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at24co2n_methods,
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sizeof(struct at24co2n_softc),
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};
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static devclass_t at24co2n_devclass;
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DRIVER_MODULE(at24co2n, iicbus, at24co2n_driver, at24co2n_devclass, 0, 0);
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MODULE_VERSION(at24co2n, 1);
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MODULE_DEPEND(at24co2n, iicbus, 1, 1, 1);
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