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/*-
* Copyright (c) 2003-2009 RMI Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of RMI Corporation, nor the names of its contributors,
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* RMI_BSD */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
/*
* reading eeprom for the mac address .
*/
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/bus.h>
#include <sys/resource.h>
#include <sys/rman.h>
#include <sys/sysctl.h>
#include <machine/bus.h>
#include <machine/cpu.h>
#include <machine/cpufunc.h>
#include <machine/frame.h>
#include <machine/resource.h>
#include <dev/iicbus/iiconf.h>
#include <dev/iicbus/iicbus.h>
#include "iicbus_if.h"
#define AT24CO_EEPROM_ETH_MACADDR 0x20
struct at24co2n_softc {
uint32_t sc_addr;
device_t sc_dev;
uint8_t sc_mac_addr[6];
};
static void at24co2n_read_mac(struct at24co2n_softc *);
static int
at24co2n_probe(device_t dev)
{
device_set_desc(dev, "AT24Co2N-10SE-2.7 EEPROM for mac address");
return (0);
}
static int
at24co2n_mac_sysctl(SYSCTL_HANDLER_ARGS)
{
struct at24co2n_softc *sc = arg1;
char buf[24];
int len;
uint8_t *p;
at24co2n_read_mac(sc);
p = sc->sc_mac_addr;
len = snprintf(buf, sizeof(buf), "%02x:%02x:%02x:%02x:%02x:%02x",
p[0], p[1], p[2], p[3], p[4], p[5]);
return SYSCTL_OUT_STR(req, buf);
}
static int
at24co2n_attach(device_t dev)
{
struct at24co2n_softc *sc = device_get_softc(dev);
struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(dev);
struct sysctl_oid *tree = device_get_sysctl_tree(dev);
if(sc == NULL) {
printf("at24co2n_attach device_get_softc failed\n");
return (0);
}
sc->sc_dev = dev;
sc->sc_addr = iicbus_get_addr(dev);
SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(tree), OID_AUTO,
"eeprom-mac", CTLTYPE_STRING | CTLFLAG_RD, sc, 0,
at24co2n_mac_sysctl, "A", "mac address");
return (0);
}
static void
at24co2n_read_mac(struct at24co2n_softc *sc)
{
uint8_t addr = AT24CO_EEPROM_ETH_MACADDR;
struct iic_msg msgs[2] = {
{ sc->sc_addr, IIC_M_WR, 1, &addr },
{ sc->sc_addr, IIC_M_RD, 6, sc->sc_mac_addr},
};
iicbus_transfer(sc->sc_dev, msgs, 2);
}
static device_method_t at24co2n_methods[] = {
DEVMETHOD(device_probe, at24co2n_probe),
DEVMETHOD(device_attach, at24co2n_attach),
{0, 0},
};
static driver_t at24co2n_driver = {
"at24co2n",
at24co2n_methods,
sizeof(struct at24co2n_softc),
};
static devclass_t at24co2n_devclass;
DRIVER_MODULE(at24co2n, iicbus, at24co2n_driver, at24co2n_devclass, 0, 0);
MODULE_VERSION(at24co2n, 1);
MODULE_DEPEND(at24co2n, iicbus, 1, 1, 1);
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