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/*-
* Copyright (c) 2010 Aleksandr Rybalko.
* 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.
*
* 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.
*/
/*
* Pseudo driver to copy the NVRAM settings from various sources
* into the kernel environment.
*
* Drivers (such as ethernet devices) can then use environment
* variables to set default parameters.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sys/dev/nvram2env/nvram2env.c 220292 2011-04-03 11:55:48Z adrian $");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/malloc.h>
#include <machine/bus.h>
#include <dev/siba/siba_ids.h>
#include <dev/siba/sibareg.h>
#include <dev/siba/sibavar.h>
#define nvram2env_read_1(sc, reg) \
bus_space_read_1((sc)->sc_bt, (sc)->sc_bh,(reg))
#define nvram2env_read_2(sc, reg) \
bus_space_read_2((sc)->sc_bt, (sc)->sc_bh,(reg))
#define nvram2env_read_4(sc, reg) \
bus_space_read_4((sc)->sc_bt, (sc)->sc_bh,(reg))
#define nvram2env_write_1(sc, reg, val) \
bus_space_write_1((sc)->sc_bt, (sc)->sc_bh, \
(reg), (val))
#define nvram2env_write_2(sc, reg, val) \
bus_space_write_2((sc)->sc_bt, (sc)->sc_bh, \
(reg), (val))
#define nvram2env_write_4(sc, reg, val) \
bus_space_write_4((sc)->sc_bt, (sc)->sc_bh, \
(reg), (val))
struct nvram2env_softc {
bus_space_tag_t bst;
bus_space_handle_t bsh;
bus_addr_t addr;
int need_swap;
uint32_t sig;
uint32_t flags;
#define NVRAM_FLAGS_NOCHECK 0x0001 /* Do not check(CRC or somthing else)*/
#define NVRAM_FLAGS_GENERIC 0x0002 /* Format Generic, skip 4b and read */
#define NVRAM_FLAGS_BROADCOM 0x0004 /* Format Broadcom, use struct nvram */
#define NVRAM_FLAGS_UBOOT 0x0008 /* Format Generic, skip 4b of CRC and read */
uint32_t maxsize;
uint32_t crc;
};
static int nvram2env_attach(device_t);
static int nvram2env_probe(device_t);
#define NVRAM_MAX_SIZE 0x10000
static void
nvram2env_identify(driver_t * drv, device_t parent)
{
int i, ivar;
for (i = 0; !resource_int_value("nvram", i, "base", &ivar); i++)
BUS_ADD_CHILD(parent, 0, "nvram2env", i);
}
static int
nvram2env_probe(device_t dev)
{
uint32_t i, ivar, sig;
struct nvram2env_softc * sc = device_get_softc(dev);
sc->bst = mips_bus_space_generic;
if (resource_int_value("nvram", device_get_unit(dev), "sig",
&sc->sig) != 0 || sc->sig == 0)
sc->sig = 0x48534c46;
if (resource_int_value("nvram", device_get_unit(dev), "maxsize",
&sc->maxsize) != 0 || sc->maxsize == 0)
sc->maxsize = NVRAM_MAX_SIZE;
if (resource_int_value("nvram", device_get_unit(dev), "flags",
&sc->flags) != 0 || sc->flags == 0)
sc->flags = NVRAM_FLAGS_GENERIC;
for (i = 0; i < 2; i ++)
{
if (resource_int_value("nvram", device_get_unit(dev),
(!i)?"base":"fallbackbase", &ivar) != 0 ||
ivar == 0)
continue;
sc->addr = MIPS_PHYS_TO_KSEG1(ivar);
if (bootverbose)
device_printf(dev, "base=0x%08x sig=0x%08x "
"maxsize=0x%08x flags=0x%08x\n",
sc->addr, sc->sig, sc->maxsize, sc->flags);
if (bus_space_map(sc->bst, sc->addr, sc->maxsize, 0,
&sc->bsh) != 0)
continue;
sig = bus_space_read_4(sc->bst, sc->bsh, 0);
if ( sig == sc->sig /*FLSH*/)
{
device_printf(dev, "Found NVRAM at %#x\n",
(uint32_t)ivar);
sc->need_swap = 0;
goto unmap_done;
}
else if ( htole32(sig) == sc->sig /*HSLF*/)
{
device_printf(dev, "Found NVRAM at %#x\n",
(uint32_t)ivar);
sc->need_swap = 1;
goto unmap_done;
} else if (sc->flags & NVRAM_FLAGS_UBOOT) {
device_printf(dev, "Use NVRAM at %#x\n",
(uint32_t)ivar);
sc->crc = sig;
goto unmap_done;
}
bus_space_unmap(sc->bst, sc->bsh, NVRAM_MAX_SIZE);
}
sc->bst = 0;
sc->bsh = 0;
sc->addr = 0;
return (ENXIO);
unmap_done:
bus_space_unmap(sc->bst, sc->bsh, NVRAM_MAX_SIZE);
device_set_desc(dev, "NVRAM to ENV pseudo-device");
return (BUS_PROBE_SPECIFIC);
}
struct nvram {
u_int32_t sig;
u_int32_t size;
u_int32_t unknown1;
u_int32_t unknown2;
u_int32_t unknown3;
char data[];
};
static uint32_t read_4(struct nvram2env_softc * sc, int offset)
{
if (sc->need_swap)
return (bswap32(bus_space_read_4(sc->bst, sc->bsh, offset)));
else
return (bus_space_read_4(sc->bst, sc->bsh, offset));
}
static int
nvram2env_attach(device_t dev)
{
struct nvram2env_softc * sc = device_get_softc(dev);
struct nvram * nv;
char *pair, *value, *assign;
uint32_t sig, size, i;
if (sc->bst == 0 || sc->addr == 0)
return (ENXIO);
if (bus_space_map(sc->bst, sc->addr, NVRAM_MAX_SIZE, 0,
&sc->bsh) != 0)
return (ENXIO);
sig = read_4(sc, 0);
size = read_4(sc, 4);
#if 1
if (bootverbose)
device_printf(dev, " size=0x%05x maxsize=0x%05x\n", size, sc->maxsize);
#endif
size = (size > sc->maxsize)?sc->maxsize:size;
if (sig == sc->sig || (sc->flags & NVRAM_FLAGS_UBOOT))
{
/* align and shift size to 32bit size*/
size += 3;
size >>= 2;
nv = malloc(size<<2, M_DEVBUF, M_WAITOK | M_ZERO);
if (!nv)
return (ENOMEM);
for (i = 0; i < size; i ++)
((uint32_t *)nv)[i] = read_4(sc, i<<2);
if (sc->flags & NVRAM_FLAGS_BROADCOM) {
device_printf(dev, "sig = %#x\n", nv->sig);
device_printf(dev, "size = %#x\n", nv->size);
}
if (!(sc->flags & NVRAM_FLAGS_NOCHECK)) {
/* TODO: need checksum verification */
}
if (sc->flags & NVRAM_FLAGS_GENERIC)
pair = (char*)nv+4;
if (sc->flags & NVRAM_FLAGS_UBOOT)
pair = (char*)nv+4;
else if (sc->flags & NVRAM_FLAGS_BROADCOM)
pair = (char*)nv+20;
else
pair = (char*)nv+4;
for ( ;
(u_int32_t)pair < ((u_int32_t)nv + size - 4);
pair = pair + strlen(pair) + 1 + strlen(value) + 1 ) {
if (pair && strlen(pair)) {
#if 0
printf("ENV: %s\n", pair);
#endif
/* hint.nvram.0. */
assign = strchr(pair,'=');
assign[0] = '\0';
value = assign+1;
#if 1
if (bootverbose)
printf("ENV: %s=%s\n", pair, value);
#endif
setenv(pair, value);
if (strcasecmp(pair, "WAN_MAC_ADDR") == 0) {
/* Alias for MAC address of eth0 */
if (bootverbose)
printf("ENV: aliasing "
"WAN_MAC_ADDR to ethaddr"
" = %s\n", value);
setenv("ethaddr", value);
}
else if (strcasecmp(pair, "LAN_MAC_ADDR") == 0){
/* Alias for MAC address of eth1 */
if (bootverbose)
printf("ENV: aliasing "
"LAN_MAC_ADDR to eth1addr"
" = %s\n", value);
setenv("eth1addr", value);
}
if (strcmp(pair, "bootverbose") == 0)
bootverbose = strtoul(value, 0, 0);
if (strcmp(pair, "boothowto" ) == 0)
boothowto = strtoul(value, 0, 0);
}
else
break;
}
free(nv, M_DEVBUF);
}
bus_space_unmap(sc->bst, sc->bsh, NVRAM_MAX_SIZE);
return (0);
}
static device_method_t nvram2env_methods[] = {
/* Device interface */
DEVMETHOD(device_identify, nvram2env_identify),
DEVMETHOD(device_probe, nvram2env_probe),
DEVMETHOD(device_attach, nvram2env_attach),
{0, 0},
};
static driver_t nvram2env_driver = {
"nvram2env",
nvram2env_methods,
sizeof(struct nvram2env_softc),
};
static devclass_t nvram2env_devclass;
DRIVER_MODULE(nvram2env, nexus, nvram2env_driver, nvram2env_devclass, 0, 0);