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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2012 Semihalf.
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/slicer.h>
#include <dev/fdt/fdt_common.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/openfirm.h>
#ifdef DEBUG
#define debugf(fmt, args...) do { printf("%s(): ", __func__); \
printf(fmt,##args); } while (0)
#else
#define debugf(fmt, args...)
#endif
static int fill_slices(device_t dev, const char *provider,
struct flash_slice *slices, int *slices_num);
static void fdt_slicer_init(void);
static int
fill_slices_from_node(phandle_t node, struct flash_slice *slices, int *count)
{
char *label;
phandle_t child;
u_long base, size;
int flags, i;
ssize_t nmlen;
i = 0;
for (child = OF_child(node); child != 0; child = OF_peer(child)) {
flags = FLASH_SLICES_FLAG_NONE;
/* Nodes with a compatible property are not slices. */
if (OF_hasprop(child, "compatible"))
continue;
if (i == FLASH_SLICES_MAX_NUM) {
debugf("not enough buffer for slice i=%d\n", i);
break;
}
/* Retrieve start and size of the slice. */
if (fdt_regsize(child, &base, &size) != 0) {
debugf("error during processing reg property, i=%d\n",
i);
continue;
}
if (size == 0) {
debugf("slice i=%d with no size\n", i);
continue;
}
/* Retrieve label. */
nmlen = OF_getprop_alloc(child, "label", (void **)&label);
if (nmlen <= 0) {
/* Use node name if no label defined */
nmlen = OF_getprop_alloc(child, "name", (void **)&label);
if (nmlen <= 0) {
debugf("slice i=%d with no name\n", i);
label = NULL;
}
}
if (OF_hasprop(child, "read-only"))
flags |= FLASH_SLICES_FLAG_RO;
/* Fill slice entry data. */
slices[i].base = base;
slices[i].size = size;
slices[i].label = label;
slices[i].flags = flags;
i++;
}
*count = i;
return (0);
}
static int
fill_slices(device_t dev, const char *provider __unused,
struct flash_slice *slices, int *slices_num)
{
phandle_t child, node;
/*
* We assume the caller provides buffer for FLASH_SLICES_MAX_NUM
* flash_slice structures.
*/
if (slices == NULL) {
*slices_num = 0;
return (ENOMEM);
}
node = ofw_bus_get_node(dev);
/*
* If there is a child node whose compatible is "fixed-partitions" then
* we have new-style data where all partitions are the children of that
* node. Otherwise we have old-style data where all the children of the
* device node are the partitions.
*/
child = fdt_find_compatible(node, "fixed-partitions", false);
if (child == 0)
return fill_slices_from_node(node, slices, slices_num);
else
return fill_slices_from_node(child, slices, slices_num);
}
static void
fdt_slicer_init(void)
{
flash_register_slicer(fill_slices, FLASH_SLICES_TYPE_NAND, false);
flash_register_slicer(fill_slices, FLASH_SLICES_TYPE_CFI, false);
flash_register_slicer(fill_slices, FLASH_SLICES_TYPE_SPI, false);
}
static void
fdt_slicer_cleanup(void)
{
flash_register_slicer(NULL, FLASH_SLICES_TYPE_NAND, true);
flash_register_slicer(NULL, FLASH_SLICES_TYPE_CFI, true);
flash_register_slicer(NULL, FLASH_SLICES_TYPE_SPI, true);
}
/*
* Must be initialized after GEOM classes (SI_SUB_DRIVERS/SI_ORDER_SECOND),
* i. e. after g_init() is called, due to the use of the GEOM topology_lock
* in flash_register_slicer(). However, must be before SI_SUB_CONFIGURE.
*/
SYSINIT(fdt_slicer, SI_SUB_DRIVERS, SI_ORDER_THIRD, fdt_slicer_init, NULL);
SYSUNINIT(fdt_slicer, SI_SUB_DRIVERS, SI_ORDER_THIRD, fdt_slicer_cleanup, NULL);
static int
mod_handler(module_t mod, int type, void *data)
{
/*
* Nothing to do here: the SYSINIT/SYSUNINIT defined above run
* automatically at module load/unload time.
*/
return (0);
}
static moduledata_t fdt_slicer_mod = {
"fdt_slicer", mod_handler, NULL
};
DECLARE_MODULE(fdt_slicer, fdt_slicer_mod, SI_SUB_DRIVERS, SI_ORDER_THIRD);
MODULE_DEPEND(fdt_slicer, g_flashmap, 0, 0, 0);
MODULE_VERSION(fdt_slicer, 1);
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