^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * tree.c: Basic device tree traversal/scanning for the Linux
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * prom library.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/openprom.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <asm/oplib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <asm/ldc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) static phandle prom_node_to_node(const char *type, phandle node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) unsigned long args[5];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) args[0] = (unsigned long) type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) args[1] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) args[2] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) args[3] = (unsigned int) node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) args[4] = (unsigned long) -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) p1275_cmd_direct(args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) return (phandle) args[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) /* Return the child of node 'node' or zero if no this node has no
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * direct descendent.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) inline phandle __prom_getchild(phandle node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) return prom_node_to_node("child", node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) phandle prom_getchild(phandle node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) phandle cnode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) if ((s32)node == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) cnode = __prom_getchild(node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) if ((s32)cnode == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) return cnode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) EXPORT_SYMBOL(prom_getchild);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) inline phandle prom_getparent(phandle node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) phandle cnode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) if ((s32)node == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) cnode = prom_node_to_node("parent", node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) if ((s32)cnode == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) return cnode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) /* Return the next sibling of node 'node' or zero if no more siblings
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) * at this level of depth in the tree.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) inline phandle __prom_getsibling(phandle node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) return prom_node_to_node(prom_peer_name, node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) phandle prom_getsibling(phandle node)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) phandle sibnode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) if ((s32)node == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) sibnode = __prom_getsibling(node);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) if ((s32)sibnode == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) return sibnode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) EXPORT_SYMBOL(prom_getsibling);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) /* Return the length in bytes of property 'prop' at node 'node'.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) * Return -1 on error.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) int prom_getproplen(phandle node, const char *prop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) unsigned long args[6];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (!node || !prop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) args[0] = (unsigned long) "getproplen";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) args[1] = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) args[2] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) args[3] = (unsigned int) node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) args[4] = (unsigned long) prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) args[5] = (unsigned long) -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) p1275_cmd_direct(args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) return (int) args[5];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) EXPORT_SYMBOL(prom_getproplen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) /* Acquire a property 'prop' at node 'node' and place it in
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) * 'buffer' which has a size of 'bufsize'. If the acquisition
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) * was successful the length will be returned, else -1 is returned.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) int prom_getproperty(phandle node, const char *prop,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) char *buffer, int bufsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) unsigned long args[8];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) int plen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) plen = prom_getproplen(node, prop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) if ((plen > bufsize) || (plen == 0) || (plen == -1))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) args[0] = (unsigned long) prom_getprop_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) args[1] = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) args[2] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) args[3] = (unsigned int) node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) args[4] = (unsigned long) prop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) args[5] = (unsigned long) buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) args[6] = bufsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) args[7] = (unsigned long) -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) p1275_cmd_direct(args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) return (int) args[7];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) EXPORT_SYMBOL(prom_getproperty);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) /* Acquire an integer property and return its value. Returns -1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) * on failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) int prom_getint(phandle node, const char *prop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) int intprop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) if (prom_getproperty(node, prop, (char *) &intprop, sizeof(int)) != -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) return intprop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) EXPORT_SYMBOL(prom_getint);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) /* Acquire an integer property, upon error return the passed default
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) * integer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) int prom_getintdefault(phandle node, const char *property, int deflt)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) retval = prom_getint(node, property);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) if (retval == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) return deflt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) EXPORT_SYMBOL(prom_getintdefault);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) /* Acquire a boolean property, 1=TRUE 0=FALSE. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) int prom_getbool(phandle node, const char *prop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) int retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) retval = prom_getproplen(node, prop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) if (retval == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) EXPORT_SYMBOL(prom_getbool);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) /* Acquire a property whose value is a string, returns a null
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) * string on error. The char pointer is the user supplied string
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) * buffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) void prom_getstring(phandle node, const char *prop, char *user_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) int ubuf_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) int len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) len = prom_getproperty(node, prop, user_buf, ubuf_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (len != -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) user_buf[0] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) EXPORT_SYMBOL(prom_getstring);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) /* Does the device at node 'node' have name 'name'?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) * YES = 1 NO = 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) int prom_nodematch(phandle node, const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) char namebuf[128];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) prom_getproperty(node, "name", namebuf, sizeof(namebuf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) if (strcmp(namebuf, name) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) /* Search siblings at 'node_start' for a node with name
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) * 'nodename'. Return node if successful, zero if not.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) phandle prom_searchsiblings(phandle node_start, const char *nodename)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) phandle thisnode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) char promlib_buf[128];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) for(thisnode = node_start; thisnode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) thisnode=prom_getsibling(thisnode)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) error = prom_getproperty(thisnode, "name", promlib_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) sizeof(promlib_buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) /* Should this ever happen? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) if(error == -1) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) if(strcmp(nodename, promlib_buf)==0) return thisnode;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) EXPORT_SYMBOL(prom_searchsiblings);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) static const char *prom_nextprop_name = "nextprop";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) /* Return the first property type for node 'node'.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) * buffer should be at least 32B in length
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) char *prom_firstprop(phandle node, char *buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) unsigned long args[7];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) *buffer = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) if ((s32)node == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) return buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) args[0] = (unsigned long) prom_nextprop_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) args[1] = 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) args[2] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) args[3] = (unsigned int) node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) args[4] = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) args[5] = (unsigned long) buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) args[6] = (unsigned long) -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) p1275_cmd_direct(args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) return buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) EXPORT_SYMBOL(prom_firstprop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) /* Return the property type string after property type 'oprop'
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) * at node 'node' . Returns NULL string if no more
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) * property types for this node.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) char *prom_nextprop(phandle node, const char *oprop, char *buffer)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) unsigned long args[7];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) char buf[32];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) if ((s32)node == -1) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) *buffer = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) return buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) if (oprop == buffer) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) strcpy (buf, oprop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) oprop = buf;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) args[0] = (unsigned long) prom_nextprop_name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) args[1] = 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) args[2] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) args[3] = (unsigned int) node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) args[4] = (unsigned long) oprop;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) args[5] = (unsigned long) buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) args[6] = (unsigned long) -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) p1275_cmd_direct(args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) return buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) EXPORT_SYMBOL(prom_nextprop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) phandle prom_finddevice(const char *name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) unsigned long args[5];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) if (!name)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) args[0] = (unsigned long) "finddevice";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) args[1] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) args[2] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) args[3] = (unsigned long) name;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) args[4] = (unsigned long) -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) p1275_cmd_direct(args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) return (int) args[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) EXPORT_SYMBOL(prom_finddevice);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) int prom_node_has_property(phandle node, const char *prop)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) char buf [32];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) *buf = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) prom_nextprop(node, buf, buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) if (!strcmp(buf, prop))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) } while (*buf);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) EXPORT_SYMBOL(prom_node_has_property);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) /* Set property 'pname' at node 'node' to value 'value' which has a length
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) * of 'size' bytes. Return the number of bytes the prom accepted.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) prom_setprop(phandle node, const char *pname, char *value, int size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) unsigned long args[8];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) if (size == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if ((pname == 0) || (value == 0))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) #ifdef CONFIG_SUN_LDOMS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) if (ldom_domaining_enabled) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) ldom_set_var(pname, value);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) args[0] = (unsigned long) "setprop";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) args[1] = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) args[2] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) args[3] = (unsigned int) node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) args[4] = (unsigned long) pname;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) args[5] = (unsigned long) value;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) args[6] = size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) args[7] = (unsigned long) -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) p1275_cmd_direct(args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) return (int) args[7];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) EXPORT_SYMBOL(prom_setprop);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) inline phandle prom_inst2pkg(int inst)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) unsigned long args[5];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) phandle node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) args[0] = (unsigned long) "instance-to-package";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) args[1] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) args[2] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) args[3] = (unsigned int) inst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) args[4] = (unsigned long) -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) p1275_cmd_direct(args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) node = (int) args[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) if ((s32)node == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) return node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) int prom_ihandle2path(int handle, char *buffer, int bufsize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) unsigned long args[7];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) args[0] = (unsigned long) "instance-to-path";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) args[1] = 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) args[2] = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) args[3] = (unsigned int) handle;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) args[4] = (unsigned long) buffer;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) args[5] = bufsize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) args[6] = (unsigned long) -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) p1275_cmd_direct(args);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) return (int) args[6];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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