2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2012 Semihalf.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD$");
32 #include <sys/param.h>
33 #include <sys/systm.h>
34 #include <sys/kernel.h>
35 #include <sys/module.h>
36 #include <sys/slicer.h>
38 #include <dev/fdt/fdt_common.h>
39 #include <dev/ofw/ofw_bus.h>
40 #include <dev/ofw/openfirm.h>
43 #define debugf(fmt, args...) do { printf("%s(): ", __func__); \
44 printf(fmt,##args); } while (0)
46 #define debugf(fmt, args...)
49 static int fill_slices(device_t dev, const char *provider,
50 struct flash_slice *slices, int *slices_num);
51 static void fdt_slicer_init(void);
54 fill_slices_from_node(phandle_t node, struct flash_slice *slices, int *count)
63 for (child = OF_child(node); child != 0; child = OF_peer(child)) {
64 flags = FLASH_SLICES_FLAG_NONE;
66 /* Nodes with a compatible property are not slices. */
67 if (OF_hasprop(child, "compatible"))
70 if (i == FLASH_SLICES_MAX_NUM) {
71 debugf("not enough buffer for slice i=%d\n", i);
75 /* Retrieve start and size of the slice. */
76 if (fdt_regsize(child, &base, &size) != 0) {
77 debugf("error during processing reg property, i=%d\n",
83 debugf("slice i=%d with no size\n", i);
88 nmlen = OF_getprop_alloc(child, "label", (void **)&label);
90 /* Use node name if no label defined */
91 nmlen = OF_getprop_alloc(child, "name", (void **)&label);
93 debugf("slice i=%d with no name\n", i);
98 if (OF_hasprop(child, "read-only"))
99 flags |= FLASH_SLICES_FLAG_RO;
101 /* Fill slice entry data. */
102 slices[i].base = base;
103 slices[i].size = size;
104 slices[i].label = label;
105 slices[i].flags = flags;
114 fill_slices(device_t dev, const char *provider __unused,
115 struct flash_slice *slices, int *slices_num)
117 phandle_t child, node;
120 * We assume the caller provides buffer for FLASH_SLICES_MAX_NUM
121 * flash_slice structures.
123 if (slices == NULL) {
128 node = ofw_bus_get_node(dev);
131 * If there is a child node whose compatible is "fixed-partitions" then
132 * we have new-style data where all partitions are the children of that
133 * node. Otherwise we have old-style data where all the children of the
134 * device node are the partitions.
136 child = fdt_find_compatible(node, "fixed-partitions", false);
138 return fill_slices_from_node(node, slices, slices_num);
140 return fill_slices_from_node(child, slices, slices_num);
144 fdt_slicer_init(void)
147 flash_register_slicer(fill_slices, FLASH_SLICES_TYPE_NAND, false);
148 flash_register_slicer(fill_slices, FLASH_SLICES_TYPE_CFI, false);
149 flash_register_slicer(fill_slices, FLASH_SLICES_TYPE_SPI, false);
153 fdt_slicer_cleanup(void)
156 flash_register_slicer(NULL, FLASH_SLICES_TYPE_NAND, true);
157 flash_register_slicer(NULL, FLASH_SLICES_TYPE_CFI, true);
158 flash_register_slicer(NULL, FLASH_SLICES_TYPE_SPI, true);
162 * Must be initialized after GEOM classes (SI_SUB_DRIVERS/SI_ORDER_SECOND),
163 * i. e. after g_init() is called, due to the use of the GEOM topology_lock
164 * in flash_register_slicer(). However, must be before SI_SUB_CONFIGURE.
166 SYSINIT(fdt_slicer, SI_SUB_DRIVERS, SI_ORDER_THIRD, fdt_slicer_init, NULL);
167 SYSUNINIT(fdt_slicer, SI_SUB_DRIVERS, SI_ORDER_THIRD, fdt_slicer_cleanup, NULL);
170 mod_handler(module_t mod, int type, void *data)
174 * Nothing to do here: the SYSINIT/SYSUNINIT defined above run
175 * automatically at module load/unload time.
180 static moduledata_t fdt_slicer_mod = {
181 "fdt_slicer", mod_handler, NULL
184 DECLARE_MODULE(fdt_slicer, fdt_slicer_mod, SI_SUB_DRIVERS, SI_ORDER_THIRD);
185 MODULE_DEPEND(fdt_slicer, g_flashmap, 0, 0, 0);
186 MODULE_VERSION(fdt_slicer, 1);