1 /*- 2 * Copyright (c) 2012 Semihalf. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 */ 26 27 #include <sys/cdefs.h> 28 __FBSDID("$FreeBSD$"); 29 30 #include <sys/param.h> 31 #include <sys/systm.h> 32 #include <sys/kernel.h> 33 #include <sys/slicer.h> 34 35 #include <dev/fdt/fdt_common.h> 36 #include <dev/ofw/ofw_bus.h> 37 #include <dev/ofw/openfirm.h> 38 39 #ifdef DEBUG 40 #define debugf(fmt, args...) do { printf("%s(): ", __func__); \ 41 printf(fmt,##args); } while (0) 42 #else 43 #define debugf(fmt, args...) 44 #endif 45 46 static int fdt_flash_fill_slices(device_t dev, const char *provider, 47 struct flash_slice *slices, int *slices_num); 48 static void fdt_slicer_init(void); 49 50 static int 51 fdt_flash_fill_slices(device_t dev, const char *provider __unused, 52 struct flash_slice *slices, int *slices_num) 53 { 54 char *slice_name; 55 phandle_t dt_node, dt_child; 56 u_long base, size; 57 int i; 58 ssize_t name_len; 59 60 /* 61 * We assume the caller provides buffer for FLASH_SLICES_MAX_NUM 62 * flash_slice structures. 63 */ 64 if (slices == NULL) { 65 *slices_num = 0; 66 return (ENOMEM); 67 } 68 69 dt_node = ofw_bus_get_node(dev); 70 for (dt_child = OF_child(dt_node), i = 0; dt_child != 0; 71 dt_child = OF_peer(dt_child)) { 72 73 if (i == FLASH_SLICES_MAX_NUM) { 74 debugf("not enough buffer for slice i=%d\n", i); 75 break; 76 } 77 78 /* 79 * Retrieve start and size of the slice. 80 */ 81 if (fdt_regsize(dt_child, &base, &size) != 0) { 82 debugf("error during processing reg property, i=%d\n", 83 i); 84 continue; 85 } 86 87 if (size == 0) { 88 debugf("slice i=%d with no size\n", i); 89 continue; 90 } 91 92 /* 93 * Retrieve label. 94 */ 95 name_len = OF_getprop_alloc(dt_child, "label", sizeof(char), 96 (void **)&slice_name); 97 if (name_len <= 0) { 98 /* Use node name if no label defined */ 99 name_len = OF_getprop_alloc(dt_child, "name", 100 sizeof(char), (void **)&slice_name); 101 if (name_len <= 0) { 102 debugf("slice i=%d with no name\n", i); 103 slice_name = NULL; 104 } 105 } 106 107 /* 108 * Fill slice entry data. 109 */ 110 slices[i].base = base; 111 slices[i].size = size; 112 slices[i].label = slice_name; 113 i++; 114 } 115 116 *slices_num = i; 117 return (0); 118 } 119 120 static void 121 fdt_slicer_init(void) 122 { 123 124 flash_register_slicer(fdt_flash_fill_slices, FLASH_SLICES_TYPE_NAND, 125 FALSE); 126 flash_register_slicer(fdt_flash_fill_slices, FLASH_SLICES_TYPE_CFI, 127 FALSE); 128 flash_register_slicer(fdt_flash_fill_slices, FLASH_SLICES_TYPE_SPI, 129 FALSE); 130 } 131 132 /* 133 * Must be initialized after GEOM classes (SI_SUB_DRIVERS/SI_ORDER_FIRST), 134 * i. e. after g_init() is called, due to the use of the GEOM topology_lock 135 * in flash_register_slicer(). However, must be before SI_SUB_CONFIGURE. 136 */ 137 SYSINIT(fdt_slicer_rootconf, SI_SUB_DRIVERS, SI_ORDER_SECOND, fdt_slicer_init, 138 NULL); 139