1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2012 Semihalf. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 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. 15 * 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 26 * SUCH DAMAGE. 27 */ 28 29 #include <sys/cdefs.h> 30 __FBSDID("$FreeBSD$"); 31 32 #include <sys/param.h> 33 #include <sys/systm.h> 34 #include <sys/kernel.h> 35 #include <sys/slicer.h> 36 37 #include <dev/fdt/fdt_common.h> 38 #include <dev/ofw/ofw_bus.h> 39 #include <dev/ofw/openfirm.h> 40 41 #ifdef DEBUG 42 #define debugf(fmt, args...) do { printf("%s(): ", __func__); \ 43 printf(fmt,##args); } while (0) 44 #else 45 #define debugf(fmt, args...) 46 #endif 47 48 static int fdt_flash_fill_slices(device_t dev, const char *provider, 49 struct flash_slice *slices, int *slices_num); 50 static void fdt_slicer_init(void); 51 52 static int 53 fdt_flash_fill_slices(device_t dev, const char *provider __unused, 54 struct flash_slice *slices, int *slices_num) 55 { 56 char *slice_name; 57 phandle_t dt_node, dt_child; 58 u_long base, size; 59 int i; 60 ssize_t name_len; 61 62 /* 63 * We assume the caller provides buffer for FLASH_SLICES_MAX_NUM 64 * flash_slice structures. 65 */ 66 if (slices == NULL) { 67 *slices_num = 0; 68 return (ENOMEM); 69 } 70 71 dt_node = ofw_bus_get_node(dev); 72 for (dt_child = OF_child(dt_node), i = 0; dt_child != 0; 73 dt_child = OF_peer(dt_child)) { 74 75 if (i == FLASH_SLICES_MAX_NUM) { 76 debugf("not enough buffer for slice i=%d\n", i); 77 break; 78 } 79 80 /* 81 * Retrieve start and size of the slice. 82 */ 83 if (fdt_regsize(dt_child, &base, &size) != 0) { 84 debugf("error during processing reg property, i=%d\n", 85 i); 86 continue; 87 } 88 89 if (size == 0) { 90 debugf("slice i=%d with no size\n", i); 91 continue; 92 } 93 94 /* 95 * Retrieve label. 96 */ 97 name_len = OF_getprop_alloc(dt_child, "label", 98 (void **)&slice_name); 99 if (name_len <= 0) { 100 /* Use node name if no label defined */ 101 name_len = OF_getprop_alloc(dt_child, "name", 102 (void **)&slice_name); 103 if (name_len <= 0) { 104 debugf("slice i=%d with no name\n", i); 105 slice_name = NULL; 106 } 107 } 108 109 /* 110 * Fill slice entry data. 111 */ 112 slices[i].base = base; 113 slices[i].size = size; 114 slices[i].label = slice_name; 115 i++; 116 } 117 118 *slices_num = i; 119 return (0); 120 } 121 122 static void 123 fdt_slicer_init(void) 124 { 125 126 flash_register_slicer(fdt_flash_fill_slices, FLASH_SLICES_TYPE_NAND, 127 FALSE); 128 flash_register_slicer(fdt_flash_fill_slices, FLASH_SLICES_TYPE_CFI, 129 FALSE); 130 flash_register_slicer(fdt_flash_fill_slices, FLASH_SLICES_TYPE_SPI, 131 FALSE); 132 } 133 134 /* 135 * Must be initialized after GEOM classes (SI_SUB_DRIVERS/SI_ORDER_FIRST), 136 * i. e. after g_init() is called, due to the use of the GEOM topology_lock 137 * in flash_register_slicer(). However, must be before SI_SUB_CONFIGURE. 138 */ 139 SYSINIT(fdt_slicer_rootconf, SI_SUB_DRIVERS, SI_ORDER_SECOND, fdt_slicer_init, 140 NULL); 141