d0beb2c412
- ds1374u : use multi-byte write. - at24co2n, max6657: remove mutex, iicbus has the necessary locking. Submitted by: Sreekanth M. S. (kanthms at netlogicmicro com)
141 lines
3.9 KiB
C
141 lines
3.9 KiB
C
/*-
|
|
* 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(req, buf, len);
|
|
}
|
|
|
|
|
|
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);
|