/*- * SPDX-License-Identifier: BSD-2-Clause * * 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 #include #include #include #include #include #include #include #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, geom_flashmap, 0, 0, 0); MODULE_VERSION(fdt_slicer, 1);