Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * csr1212.c -- IEEE 1212 Control and Status Register support for Linux |
| 3 | * |
| 4 | * Copyright (C) 2003 Francois Retief <fgretief@sun.ac.za> |
| 5 | * Steve Kinneberg <kinnebergsteve@acmsystems.com> |
| 6 | * |
| 7 | * Redistribution and use in source and binary forms, with or without |
| 8 | * modification, are permitted provided that the following conditions are met: |
| 9 | * |
| 10 | * 1. Redistributions of source code must retain the above copyright notice, |
| 11 | * 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 | * 3. The name of the author may not be used to endorse or promote products |
| 16 | * derived from this software without specific prior written permission. |
| 17 | * |
| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED |
| 19 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| 20 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO |
| 21 | * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 22 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 23 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| 24 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 25 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| 26 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| 27 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 28 | */ |
| 29 | |
| 30 | |
| 31 | /* TODO List: |
| 32 | * - Verify interface consistency: i.e., public functions that take a size |
| 33 | * parameter expect size to be in bytes. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | */ |
| 35 | |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 36 | #include <linux/errno.h> |
Stefan Richter | d265250 | 2007-03-14 00:29:20 +0100 | [diff] [blame] | 37 | #include <linux/kernel.h> |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 38 | #include <linux/string.h> |
Stefan Richter | 64ff712 | 2007-03-11 22:50:13 +0100 | [diff] [blame] | 39 | #include <asm/bug.h> |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 40 | #include <asm/byteorder.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
| 42 | #include "csr1212.h" |
| 43 | |
| 44 | |
| 45 | /* Permitted key type for each key id */ |
| 46 | #define __I (1 << CSR1212_KV_TYPE_IMMEDIATE) |
| 47 | #define __C (1 << CSR1212_KV_TYPE_CSR_OFFSET) |
| 48 | #define __D (1 << CSR1212_KV_TYPE_DIRECTORY) |
| 49 | #define __L (1 << CSR1212_KV_TYPE_LEAF) |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 50 | static const u8 csr1212_key_id_type_map[0x30] = { |
Andrea Guzzo | 0749aaa | 2006-12-08 00:53:24 +0100 | [diff] [blame] | 51 | __C, /* used by Apple iSight */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 52 | __D | __L, /* Descriptor */ |
| 53 | __I | __D | __L, /* Bus_Dependent_Info */ |
| 54 | __I | __D | __L, /* Vendor */ |
| 55 | __I, /* Hardware_Version */ |
| 56 | 0, 0, /* Reserved */ |
Andrea Guzzo | 0749aaa | 2006-12-08 00:53:24 +0100 | [diff] [blame] | 57 | __D | __L | __I, /* Module */ |
| 58 | __I, 0, 0, 0, /* used by Apple iSight, Reserved */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | __I, /* Node_Capabilities */ |
| 60 | __L, /* EUI_64 */ |
| 61 | 0, 0, 0, /* Reserved */ |
| 62 | __D, /* Unit */ |
| 63 | __I, /* Specifier_ID */ |
| 64 | __I, /* Version */ |
| 65 | __I | __C | __D | __L, /* Dependent_Info */ |
| 66 | __L, /* Unit_Location */ |
| 67 | 0, /* Reserved */ |
| 68 | __I, /* Model */ |
| 69 | __D, /* Instance */ |
| 70 | __L, /* Keyword */ |
| 71 | __D, /* Feature */ |
| 72 | __L, /* Extended_ROM */ |
| 73 | __I, /* Extended_Key_Specifier_ID */ |
| 74 | __I, /* Extended_Key */ |
| 75 | __I | __C | __D | __L, /* Extended_Data */ |
| 76 | __L, /* Modifiable_Descriptor */ |
| 77 | __I, /* Directory_ID */ |
| 78 | __I, /* Revision */ |
| 79 | }; |
| 80 | #undef __I |
| 81 | #undef __C |
| 82 | #undef __D |
| 83 | #undef __L |
| 84 | |
| 85 | |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 86 | #define quads_to_bytes(_q) ((_q) * sizeof(u32)) |
| 87 | #define bytes_to_quads(_b) (((_b) + sizeof(u32) - 1) / sizeof(u32)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
Stefan Richter | 6c88e47 | 2007-03-11 22:47:34 +0100 | [diff] [blame] | 89 | static void free_keyval(struct csr1212_keyval *kv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 90 | { |
| 91 | if ((kv->key.type == CSR1212_KV_TYPE_LEAF) && |
| 92 | (kv->key.id != CSR1212_KV_ID_EXTENDED_ROM)) |
| 93 | CSR1212_FREE(kv->value.leaf.data); |
| 94 | |
| 95 | CSR1212_FREE(kv); |
| 96 | } |
| 97 | |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 98 | static u16 csr1212_crc16(const u32 *buffer, size_t length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | { |
| 100 | int shift; |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 101 | u32 data; |
| 102 | u16 sum, crc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | |
| 104 | for (; length; length--) { |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 105 | data = be32_to_cpu(*buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | buffer++; |
| 107 | for (shift = 28; shift >= 0; shift -= 4 ) { |
| 108 | sum = ((crc >> 12) ^ (data >> shift)) & 0xf; |
| 109 | crc = (crc << 4) ^ (sum << 12) ^ (sum << 5) ^ (sum); |
| 110 | } |
| 111 | crc &= 0xffff; |
| 112 | } |
| 113 | |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 114 | return cpu_to_be16(crc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | } |
| 116 | |
Stefan Richter | d265250 | 2007-03-14 00:29:20 +0100 | [diff] [blame] | 117 | /* Microsoft computes the CRC with the bytes in reverse order. */ |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 118 | static u16 csr1212_msft_crc16(const u32 *buffer, size_t length) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | { |
| 120 | int shift; |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 121 | u32 data; |
| 122 | u16 sum, crc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | |
| 124 | for (; length; length--) { |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 125 | data = le32_to_cpu(*buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | buffer++; |
| 127 | for (shift = 28; shift >= 0; shift -= 4 ) { |
| 128 | sum = ((crc >> 12) ^ (data >> shift)) & 0xf; |
| 129 | crc = (crc << 4) ^ (sum << 12) ^ (sum << 5) ^ (sum); |
| 130 | } |
| 131 | crc &= 0xffff; |
| 132 | } |
| 133 | |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 134 | return cpu_to_be16(crc); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | |
Stefan Richter | 6c88e47 | 2007-03-11 22:47:34 +0100 | [diff] [blame] | 137 | static struct csr1212_dentry * |
| 138 | csr1212_find_keyval(struct csr1212_keyval *dir, struct csr1212_keyval *kv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | { |
| 140 | struct csr1212_dentry *pos; |
| 141 | |
| 142 | for (pos = dir->value.directory.dentries_head; |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 143 | pos != NULL; pos = pos->next) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | if (pos->kv == kv) |
| 145 | return pos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | return NULL; |
| 147 | } |
| 148 | |
Stefan Richter | 6c88e47 | 2007-03-11 22:47:34 +0100 | [diff] [blame] | 149 | static struct csr1212_keyval * |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 150 | csr1212_find_keyval_offset(struct csr1212_keyval *kv_list, u32 offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | { |
| 152 | struct csr1212_keyval *kv; |
| 153 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 154 | for (kv = kv_list->next; kv && (kv != kv_list); kv = kv->next) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | if (kv->offset == offset) |
| 156 | return kv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | return NULL; |
| 158 | } |
| 159 | |
| 160 | |
| 161 | /* Creation Routines */ |
Stefan Richter | 6c88e47 | 2007-03-11 22:47:34 +0100 | [diff] [blame] | 162 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | struct csr1212_csr *csr1212_create_csr(struct csr1212_bus_ops *ops, |
| 164 | size_t bus_info_size, void *private) |
| 165 | { |
| 166 | struct csr1212_csr *csr; |
| 167 | |
| 168 | csr = CSR1212_MALLOC(sizeof(*csr)); |
| 169 | if (!csr) |
| 170 | return NULL; |
| 171 | |
| 172 | csr->cache_head = |
| 173 | csr1212_rom_cache_malloc(CSR1212_CONFIG_ROM_SPACE_OFFSET, |
| 174 | CSR1212_CONFIG_ROM_SPACE_SIZE); |
| 175 | if (!csr->cache_head) { |
| 176 | CSR1212_FREE(csr); |
| 177 | return NULL; |
| 178 | } |
| 179 | |
| 180 | /* The keyval key id is not used for the root node, but a valid key id |
| 181 | * that can be used for a directory needs to be passed to |
| 182 | * csr1212_new_directory(). */ |
| 183 | csr->root_kv = csr1212_new_directory(CSR1212_KV_ID_VENDOR); |
| 184 | if (!csr->root_kv) { |
| 185 | CSR1212_FREE(csr->cache_head); |
| 186 | CSR1212_FREE(csr); |
| 187 | return NULL; |
| 188 | } |
| 189 | |
| 190 | csr->bus_info_data = csr->cache_head->data; |
| 191 | csr->bus_info_len = bus_info_size; |
| 192 | csr->crc_len = bus_info_size; |
| 193 | csr->ops = ops; |
| 194 | csr->private = private; |
| 195 | csr->cache_tail = csr->cache_head; |
| 196 | |
| 197 | return csr; |
| 198 | } |
| 199 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | void csr1212_init_local_csr(struct csr1212_csr *csr, |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 201 | const u32 *bus_info_data, int max_rom) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | { |
| 203 | static const int mr_map[] = { 4, 64, 1024, 0 }; |
| 204 | |
Ben Collins | 1934b8b | 2005-07-09 20:01:23 -0400 | [diff] [blame] | 205 | BUG_ON(max_rom & ~0x3); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 206 | csr->max_rom = mr_map[max_rom]; |
| 207 | memcpy(csr->bus_info_data, bus_info_data, csr->bus_info_len); |
| 208 | } |
| 209 | |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 210 | static struct csr1212_keyval *csr1212_new_keyval(u8 type, u8 key) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | { |
| 212 | struct csr1212_keyval *kv; |
| 213 | |
| 214 | if (key < 0x30 && ((csr1212_key_id_type_map[key] & (1 << type)) == 0)) |
| 215 | return NULL; |
| 216 | |
| 217 | kv = CSR1212_MALLOC(sizeof(*kv)); |
| 218 | if (!kv) |
| 219 | return NULL; |
| 220 | |
Stefan Richter | 17a19b7 | 2007-09-15 14:50:25 +0200 | [diff] [blame] | 221 | atomic_set(&kv->refcnt, 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | kv->key.type = type; |
| 223 | kv->key.id = key; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | kv->associate = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | kv->next = NULL; |
| 226 | kv->prev = NULL; |
| 227 | kv->offset = 0; |
| 228 | kv->valid = 0; |
| 229 | return kv; |
| 230 | } |
| 231 | |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 232 | struct csr1212_keyval *csr1212_new_immediate(u8 key, u32 value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | { |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 234 | struct csr1212_keyval *kv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 236 | kv = csr1212_new_keyval(CSR1212_KV_TYPE_IMMEDIATE, key); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | if (!kv) |
| 238 | return NULL; |
| 239 | |
| 240 | kv->value.immediate = value; |
| 241 | kv->valid = 1; |
| 242 | return kv; |
| 243 | } |
| 244 | |
Stefan Richter | 6c88e47 | 2007-03-11 22:47:34 +0100 | [diff] [blame] | 245 | static struct csr1212_keyval * |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 246 | csr1212_new_leaf(u8 key, const void *data, size_t data_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | { |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 248 | struct csr1212_keyval *kv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 250 | kv = csr1212_new_keyval(CSR1212_KV_TYPE_LEAF, key); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | if (!kv) |
| 252 | return NULL; |
| 253 | |
| 254 | if (data_len > 0) { |
| 255 | kv->value.leaf.data = CSR1212_MALLOC(data_len); |
| 256 | if (!kv->value.leaf.data) { |
| 257 | CSR1212_FREE(kv); |
| 258 | return NULL; |
| 259 | } |
| 260 | |
| 261 | if (data) |
| 262 | memcpy(kv->value.leaf.data, data, data_len); |
| 263 | } else { |
| 264 | kv->value.leaf.data = NULL; |
| 265 | } |
| 266 | |
| 267 | kv->value.leaf.len = bytes_to_quads(data_len); |
| 268 | kv->offset = 0; |
| 269 | kv->valid = 1; |
| 270 | |
| 271 | return kv; |
| 272 | } |
| 273 | |
Stefan Richter | 6c88e47 | 2007-03-11 22:47:34 +0100 | [diff] [blame] | 274 | static struct csr1212_keyval * |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 275 | csr1212_new_csr_offset(u8 key, u32 csr_offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | { |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 277 | struct csr1212_keyval *kv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 279 | kv = csr1212_new_keyval(CSR1212_KV_TYPE_CSR_OFFSET, key); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | if (!kv) |
| 281 | return NULL; |
| 282 | |
| 283 | kv->value.csr_offset = csr_offset; |
| 284 | |
| 285 | kv->offset = 0; |
| 286 | kv->valid = 1; |
| 287 | return kv; |
| 288 | } |
| 289 | |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 290 | struct csr1212_keyval *csr1212_new_directory(u8 key) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | { |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 292 | struct csr1212_keyval *kv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 294 | kv = csr1212_new_keyval(CSR1212_KV_TYPE_DIRECTORY, key); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | if (!kv) |
| 296 | return NULL; |
| 297 | |
| 298 | kv->value.directory.len = 0; |
| 299 | kv->offset = 0; |
| 300 | kv->value.directory.dentries_head = NULL; |
| 301 | kv->value.directory.dentries_tail = NULL; |
| 302 | kv->valid = 1; |
| 303 | return kv; |
| 304 | } |
| 305 | |
Stefan Richter | 64ff712 | 2007-03-11 22:50:13 +0100 | [diff] [blame] | 306 | void csr1212_associate_keyval(struct csr1212_keyval *kv, |
| 307 | struct csr1212_keyval *associate) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | { |
Stefan Richter | 64ff712 | 2007-03-11 22:50:13 +0100 | [diff] [blame] | 309 | BUG_ON(!kv || !associate || kv->key.id == CSR1212_KV_ID_DESCRIPTOR || |
| 310 | (associate->key.id != CSR1212_KV_ID_DESCRIPTOR && |
| 311 | associate->key.id != CSR1212_KV_ID_DEPENDENT_INFO && |
| 312 | associate->key.id != CSR1212_KV_ID_EXTENDED_KEY && |
| 313 | associate->key.id != CSR1212_KV_ID_EXTENDED_DATA && |
| 314 | associate->key.id < 0x30) || |
| 315 | (kv->key.id == CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID && |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 316 | associate->key.id != CSR1212_KV_ID_EXTENDED_KEY) || |
Stefan Richter | 64ff712 | 2007-03-11 22:50:13 +0100 | [diff] [blame] | 317 | (kv->key.id == CSR1212_KV_ID_EXTENDED_KEY && |
| 318 | associate->key.id != CSR1212_KV_ID_EXTENDED_DATA) || |
| 319 | (associate->key.id == CSR1212_KV_ID_EXTENDED_KEY && |
| 320 | kv->key.id != CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID) || |
| 321 | (associate->key.id == CSR1212_KV_ID_EXTENDED_DATA && |
| 322 | kv->key.id != CSR1212_KV_ID_EXTENDED_KEY)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | |
| 324 | if (kv->associate) |
| 325 | csr1212_release_keyval(kv->associate); |
| 326 | |
Stefan Richter | 17a19b7 | 2007-09-15 14:50:25 +0200 | [diff] [blame] | 327 | csr1212_keep_keyval(associate); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | kv->associate = associate; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | } |
| 330 | |
Stefan Richter | 17a19b7 | 2007-09-15 14:50:25 +0200 | [diff] [blame] | 331 | static int __csr1212_attach_keyval_to_directory(struct csr1212_keyval *dir, |
| 332 | struct csr1212_keyval *kv, |
| 333 | bool keep_keyval) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | { |
| 335 | struct csr1212_dentry *dentry; |
| 336 | |
Stefan Richter | 64ff712 | 2007-03-11 22:50:13 +0100 | [diff] [blame] | 337 | BUG_ON(!kv || !dir || dir->key.type != CSR1212_KV_TYPE_DIRECTORY); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | |
| 339 | dentry = CSR1212_MALLOC(sizeof(*dentry)); |
| 340 | if (!dentry) |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 341 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | |
Stefan Richter | 17a19b7 | 2007-09-15 14:50:25 +0200 | [diff] [blame] | 343 | if (keep_keyval) |
| 344 | csr1212_keep_keyval(kv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | dentry->kv = kv; |
| 346 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | dentry->next = NULL; |
| 348 | dentry->prev = dir->value.directory.dentries_tail; |
| 349 | |
| 350 | if (!dir->value.directory.dentries_head) |
| 351 | dir->value.directory.dentries_head = dentry; |
| 352 | |
| 353 | if (dir->value.directory.dentries_tail) |
| 354 | dir->value.directory.dentries_tail->next = dentry; |
| 355 | dir->value.directory.dentries_tail = dentry; |
| 356 | |
| 357 | return CSR1212_SUCCESS; |
| 358 | } |
| 359 | |
Stefan Richter | 17a19b7 | 2007-09-15 14:50:25 +0200 | [diff] [blame] | 360 | int csr1212_attach_keyval_to_directory(struct csr1212_keyval *dir, |
| 361 | struct csr1212_keyval *kv) |
| 362 | { |
| 363 | return __csr1212_attach_keyval_to_directory(dir, kv, true); |
| 364 | } |
| 365 | |
Stefan Richter | 6c88e47 | 2007-03-11 22:47:34 +0100 | [diff] [blame] | 366 | #define CSR1212_DESCRIPTOR_LEAF_DATA(kv) \ |
| 367 | (&((kv)->value.leaf.data[1])) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | |
Stefan Richter | 6c88e47 | 2007-03-11 22:47:34 +0100 | [diff] [blame] | 369 | #define CSR1212_DESCRIPTOR_LEAF_SET_TYPE(kv, type) \ |
| 370 | ((kv)->value.leaf.data[0] = \ |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 371 | cpu_to_be32(CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) | \ |
| 372 | ((type) << CSR1212_DESCRIPTOR_LEAF_TYPE_SHIFT))) |
Stefan Richter | 6c88e47 | 2007-03-11 22:47:34 +0100 | [diff] [blame] | 373 | #define CSR1212_DESCRIPTOR_LEAF_SET_SPECIFIER_ID(kv, spec_id) \ |
| 374 | ((kv)->value.leaf.data[0] = \ |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 375 | cpu_to_be32((CSR1212_DESCRIPTOR_LEAF_TYPE(kv) << \ |
| 376 | CSR1212_DESCRIPTOR_LEAF_TYPE_SHIFT) | \ |
| 377 | ((spec_id) & CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID_MASK))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 378 | |
Stefan Richter | 6c88e47 | 2007-03-11 22:47:34 +0100 | [diff] [blame] | 379 | static struct csr1212_keyval * |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 380 | csr1212_new_descriptor_leaf(u8 dtype, u32 specifier_id, |
Stefan Richter | 6c88e47 | 2007-03-11 22:47:34 +0100 | [diff] [blame] | 381 | const void *data, size_t data_len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | { |
| 383 | struct csr1212_keyval *kv; |
| 384 | |
| 385 | kv = csr1212_new_leaf(CSR1212_KV_ID_DESCRIPTOR, NULL, |
| 386 | data_len + CSR1212_DESCRIPTOR_LEAF_OVERHEAD); |
| 387 | if (!kv) |
| 388 | return NULL; |
| 389 | |
| 390 | CSR1212_DESCRIPTOR_LEAF_SET_TYPE(kv, dtype); |
| 391 | CSR1212_DESCRIPTOR_LEAF_SET_SPECIFIER_ID(kv, specifier_id); |
| 392 | |
Stefan Richter | a1c6250 | 2007-03-14 00:27:18 +0100 | [diff] [blame] | 393 | if (data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | memcpy(CSR1212_DESCRIPTOR_LEAF_DATA(kv), data, data_len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | |
| 396 | return kv; |
| 397 | } |
| 398 | |
Stefan Richter | a1c6250 | 2007-03-14 00:27:18 +0100 | [diff] [blame] | 399 | /* Check if string conforms to minimal ASCII as per IEEE 1212 clause 7.4 */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | static int csr1212_check_minimal_ascii(const char *s) |
| 401 | { |
| 402 | static const char minimal_ascii_table[] = { |
Stefan Richter | a1c6250 | 2007-03-14 00:27:18 +0100 | [diff] [blame] | 403 | /* 1 2 4 8 16 32 64 128 */ |
| 404 | 128, /* --, --, --, --, --, --, --, 07, */ |
| 405 | 4 + 16 + 32, /* --, --, 0a, --, 0C, 0D, --, --, */ |
| 406 | 0, /* --, --, --, --, --, --, --, --, */ |
| 407 | 0, /* --, --, --, --, --, --, --, --, */ |
| 408 | 255 - 8 - 16, /* 20, 21, 22, --, --, 25, 26, 27, */ |
| 409 | 255, /* 28, 29, 2a, 2b, 2c, 2d, 2e, 2f, */ |
| 410 | 255, /* 30, 31, 32, 33, 34, 35, 36, 37, */ |
| 411 | 255, /* 38, 39, 3a, 3b, 3c, 3d, 3e, 3f, */ |
| 412 | 255, /* 40, 41, 42, 43, 44, 45, 46, 47, */ |
| 413 | 255, /* 48, 49, 4a, 4b, 4c, 4d, 4e, 4f, */ |
| 414 | 255, /* 50, 51, 52, 53, 54, 55, 56, 57, */ |
| 415 | 1 + 2 + 4 + 128, /* 58, 59, 5a, --, --, --, --, 5f, */ |
| 416 | 255 - 1, /* --, 61, 62, 63, 64, 65, 66, 67, */ |
| 417 | 255, /* 68, 69, 6a, 6b, 6c, 6d, 6e, 6f, */ |
| 418 | 255, /* 70, 71, 72, 73, 74, 75, 76, 77, */ |
| 419 | 1 + 2 + 4, /* 78, 79, 7a, --, --, --, --, --, */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | }; |
Stefan Richter | a1c6250 | 2007-03-14 00:27:18 +0100 | [diff] [blame] | 421 | int i, j; |
| 422 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | for (; *s; s++) { |
Stefan Richter | a1c6250 | 2007-03-14 00:27:18 +0100 | [diff] [blame] | 424 | i = *s >> 3; /* i = *s / 8; */ |
| 425 | j = 1 << (*s & 3); /* j = 1 << (*s % 8); */ |
| 426 | |
| 427 | if (i >= ARRAY_SIZE(minimal_ascii_table) || |
| 428 | !(minimal_ascii_table[i] & j)) |
| 429 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | return 0; |
| 432 | } |
| 433 | |
Stefan Richter | a1c6250 | 2007-03-14 00:27:18 +0100 | [diff] [blame] | 434 | /* IEEE 1212 clause 7.5.4.1 textual descriptors (English, minimal ASCII) */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | struct csr1212_keyval *csr1212_new_string_descriptor_leaf(const char *s) |
| 436 | { |
Stefan Richter | a1c6250 | 2007-03-14 00:27:18 +0100 | [diff] [blame] | 437 | struct csr1212_keyval *kv; |
| 438 | u32 *text; |
| 439 | size_t str_len, quads; |
| 440 | |
| 441 | if (!s || !*s || csr1212_check_minimal_ascii(s)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | return NULL; |
| 443 | |
Stefan Richter | a1c6250 | 2007-03-14 00:27:18 +0100 | [diff] [blame] | 444 | str_len = strlen(s); |
| 445 | quads = bytes_to_quads(str_len); |
| 446 | kv = csr1212_new_descriptor_leaf(0, 0, NULL, quads_to_bytes(quads) + |
| 447 | CSR1212_TEXTUAL_DESCRIPTOR_LEAF_OVERHEAD); |
| 448 | if (!kv) |
| 449 | return NULL; |
| 450 | |
| 451 | kv->value.leaf.data[1] = 0; /* width, character_set, language */ |
| 452 | text = CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(kv); |
| 453 | text[quads - 1] = 0; /* padding */ |
| 454 | memcpy(text, s, str_len); |
| 455 | |
| 456 | return kv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 457 | } |
| 458 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 459 | |
| 460 | /* Destruction Routines */ |
| 461 | |
| 462 | void csr1212_detach_keyval_from_directory(struct csr1212_keyval *dir, |
| 463 | struct csr1212_keyval *kv) |
| 464 | { |
| 465 | struct csr1212_dentry *dentry; |
| 466 | |
| 467 | if (!kv || !dir || dir->key.type != CSR1212_KV_TYPE_DIRECTORY) |
| 468 | return; |
| 469 | |
| 470 | dentry = csr1212_find_keyval(dir, kv); |
| 471 | |
| 472 | if (!dentry) |
| 473 | return; |
| 474 | |
| 475 | if (dentry->prev) |
| 476 | dentry->prev->next = dentry->next; |
| 477 | if (dentry->next) |
| 478 | dentry->next->prev = dentry->prev; |
| 479 | if (dir->value.directory.dentries_head == dentry) |
| 480 | dir->value.directory.dentries_head = dentry->next; |
| 481 | if (dir->value.directory.dentries_tail == dentry) |
| 482 | dir->value.directory.dentries_tail = dentry->prev; |
| 483 | |
| 484 | CSR1212_FREE(dentry); |
| 485 | |
| 486 | csr1212_release_keyval(kv); |
| 487 | } |
| 488 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | /* This function is used to free the memory taken by a keyval. If the given |
| 490 | * keyval is a directory type, then any keyvals contained in that directory |
Stefan Richter | 17a19b7 | 2007-09-15 14:50:25 +0200 | [diff] [blame] | 491 | * will be destroyed as well if noone holds a reference on them. By means of |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | * list manipulation, this routine will descend a directory structure in a |
| 493 | * non-recursive manner. */ |
Stefan Richter | 17a19b7 | 2007-09-15 14:50:25 +0200 | [diff] [blame] | 494 | void csr1212_release_keyval(struct csr1212_keyval *kv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | { |
| 496 | struct csr1212_keyval *k, *a; |
| 497 | struct csr1212_dentry dentry; |
| 498 | struct csr1212_dentry *head, *tail; |
| 499 | |
Stefan Richter | 17a19b7 | 2007-09-15 14:50:25 +0200 | [diff] [blame] | 500 | if (!atomic_dec_and_test(&kv->refcnt)) |
| 501 | return; |
| 502 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | dentry.kv = kv; |
| 504 | dentry.next = NULL; |
| 505 | dentry.prev = NULL; |
| 506 | |
| 507 | head = &dentry; |
| 508 | tail = head; |
| 509 | |
| 510 | while (head) { |
| 511 | k = head->kv; |
| 512 | |
| 513 | while (k) { |
Stefan Richter | 17a19b7 | 2007-09-15 14:50:25 +0200 | [diff] [blame] | 514 | /* must not dec_and_test kv->refcnt again */ |
| 515 | if (k != kv && !atomic_dec_and_test(&k->refcnt)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 516 | break; |
| 517 | |
| 518 | a = k->associate; |
| 519 | |
| 520 | if (k->key.type == CSR1212_KV_TYPE_DIRECTORY) { |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 521 | /* If the current entry is a directory, move all |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | * the entries to the destruction list. */ |
| 523 | if (k->value.directory.dentries_head) { |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 524 | tail->next = |
| 525 | k->value.directory.dentries_head; |
| 526 | k->value.directory.dentries_head->prev = |
| 527 | tail; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | tail = k->value.directory.dentries_tail; |
| 529 | } |
| 530 | } |
| 531 | free_keyval(k); |
| 532 | k = a; |
| 533 | } |
| 534 | |
| 535 | head = head->next; |
| 536 | if (head) { |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 537 | if (head->prev && head->prev != &dentry) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 538 | CSR1212_FREE(head->prev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 539 | head->prev = NULL; |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 540 | } else if (tail != &dentry) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 541 | CSR1212_FREE(tail); |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 542 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 543 | } |
| 544 | } |
| 545 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 546 | void csr1212_destroy_csr(struct csr1212_csr *csr) |
| 547 | { |
| 548 | struct csr1212_csr_rom_cache *c, *oc; |
| 549 | struct csr1212_cache_region *cr, *ocr; |
| 550 | |
| 551 | csr1212_release_keyval(csr->root_kv); |
| 552 | |
| 553 | c = csr->cache_head; |
| 554 | while (c) { |
| 555 | oc = c; |
| 556 | cr = c->filled_head; |
| 557 | while (cr) { |
| 558 | ocr = cr; |
| 559 | cr = cr->next; |
| 560 | CSR1212_FREE(ocr); |
| 561 | } |
| 562 | c = c->next; |
| 563 | CSR1212_FREE(oc); |
| 564 | } |
| 565 | |
| 566 | CSR1212_FREE(csr); |
| 567 | } |
| 568 | |
| 569 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | /* CSR Image Creation */ |
| 571 | |
| 572 | static int csr1212_append_new_cache(struct csr1212_csr *csr, size_t romsize) |
| 573 | { |
| 574 | struct csr1212_csr_rom_cache *cache; |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 575 | u64 csr_addr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | |
Stefan Richter | 64ff712 | 2007-03-11 22:50:13 +0100 | [diff] [blame] | 577 | BUG_ON(!csr || !csr->ops || !csr->ops->allocate_addr_range || |
| 578 | !csr->ops->release_addr || csr->max_rom < 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | |
| 580 | /* ROM size must be a multiple of csr->max_rom */ |
| 581 | romsize = (romsize + (csr->max_rom - 1)) & ~(csr->max_rom - 1); |
| 582 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 583 | csr_addr = csr->ops->allocate_addr_range(romsize, csr->max_rom, |
| 584 | csr->private); |
| 585 | if (csr_addr == CSR1212_INVALID_ADDR_SPACE) |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 586 | return -ENOMEM; |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 587 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | if (csr_addr < CSR1212_REGISTER_SPACE_BASE) { |
| 589 | /* Invalid address returned from allocate_addr_range(). */ |
| 590 | csr->ops->release_addr(csr_addr, csr->private); |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 591 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | } |
| 593 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 594 | cache = csr1212_rom_cache_malloc(csr_addr - CSR1212_REGISTER_SPACE_BASE, |
| 595 | romsize); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | if (!cache) { |
| 597 | csr->ops->release_addr(csr_addr, csr->private); |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 598 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | } |
| 600 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 601 | cache->ext_rom = csr1212_new_keyval(CSR1212_KV_TYPE_LEAF, |
| 602 | CSR1212_KV_ID_EXTENDED_ROM); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | if (!cache->ext_rom) { |
| 604 | csr->ops->release_addr(csr_addr, csr->private); |
| 605 | CSR1212_FREE(cache); |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 606 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | } |
| 608 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 609 | if (csr1212_attach_keyval_to_directory(csr->root_kv, cache->ext_rom) != |
| 610 | CSR1212_SUCCESS) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | csr1212_release_keyval(cache->ext_rom); |
| 612 | csr->ops->release_addr(csr_addr, csr->private); |
| 613 | CSR1212_FREE(cache); |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 614 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | } |
| 616 | cache->ext_rom->offset = csr_addr - CSR1212_REGISTER_SPACE_BASE; |
| 617 | cache->ext_rom->value.leaf.len = -1; |
| 618 | cache->ext_rom->value.leaf.data = cache->data; |
| 619 | |
| 620 | /* Add cache to tail of cache list */ |
| 621 | cache->prev = csr->cache_tail; |
| 622 | csr->cache_tail->next = cache; |
| 623 | csr->cache_tail = cache; |
| 624 | return CSR1212_SUCCESS; |
| 625 | } |
| 626 | |
Stefan Richter | 6c88e47 | 2007-03-11 22:47:34 +0100 | [diff] [blame] | 627 | static void csr1212_remove_cache(struct csr1212_csr *csr, |
| 628 | struct csr1212_csr_rom_cache *cache) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | { |
| 630 | if (csr->cache_head == cache) |
| 631 | csr->cache_head = cache->next; |
| 632 | if (csr->cache_tail == cache) |
| 633 | csr->cache_tail = cache->prev; |
| 634 | |
| 635 | if (cache->prev) |
| 636 | cache->prev->next = cache->next; |
| 637 | if (cache->next) |
| 638 | cache->next->prev = cache->prev; |
| 639 | |
| 640 | if (cache->ext_rom) { |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 641 | csr1212_detach_keyval_from_directory(csr->root_kv, |
| 642 | cache->ext_rom); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | csr1212_release_keyval(cache->ext_rom); |
| 644 | } |
| 645 | |
| 646 | CSR1212_FREE(cache); |
| 647 | } |
| 648 | |
| 649 | static int csr1212_generate_layout_subdir(struct csr1212_keyval *dir, |
| 650 | struct csr1212_keyval **layout_tail) |
| 651 | { |
| 652 | struct csr1212_dentry *dentry; |
| 653 | struct csr1212_keyval *dkv; |
| 654 | struct csr1212_keyval *last_extkey_spec = NULL; |
| 655 | struct csr1212_keyval *last_extkey = NULL; |
| 656 | int num_entries = 0; |
| 657 | |
| 658 | for (dentry = dir->value.directory.dentries_head; dentry; |
| 659 | dentry = dentry->next) { |
| 660 | for (dkv = dentry->kv; dkv; dkv = dkv->associate) { |
| 661 | /* Special Case: Extended Key Specifier_ID */ |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 662 | if (dkv->key.id == |
| 663 | CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID) { |
| 664 | if (last_extkey_spec == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 665 | last_extkey_spec = dkv; |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 666 | else if (dkv->value.immediate != |
| 667 | last_extkey_spec->value.immediate) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 668 | last_extkey_spec = dkv; |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 669 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 670 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 671 | /* Special Case: Extended Key */ |
| 672 | } else if (dkv->key.id == CSR1212_KV_ID_EXTENDED_KEY) { |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 673 | if (last_extkey == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 674 | last_extkey = dkv; |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 675 | else if (dkv->value.immediate != |
| 676 | last_extkey->value.immediate) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 677 | last_extkey = dkv; |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 678 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 679 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | } |
| 681 | |
| 682 | num_entries += 1; |
| 683 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 684 | switch (dkv->key.type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | default: |
| 686 | case CSR1212_KV_TYPE_IMMEDIATE: |
| 687 | case CSR1212_KV_TYPE_CSR_OFFSET: |
| 688 | break; |
| 689 | case CSR1212_KV_TYPE_LEAF: |
| 690 | case CSR1212_KV_TYPE_DIRECTORY: |
| 691 | /* Remove from list */ |
| 692 | if (dkv->prev && (dkv->prev->next == dkv)) |
| 693 | dkv->prev->next = dkv->next; |
| 694 | if (dkv->next && (dkv->next->prev == dkv)) |
| 695 | dkv->next->prev = dkv->prev; |
| 696 | //if (dkv == *layout_tail) |
| 697 | // *layout_tail = dkv->prev; |
| 698 | |
| 699 | /* Special case: Extended ROM leafs */ |
| 700 | if (dkv->key.id == CSR1212_KV_ID_EXTENDED_ROM) { |
| 701 | dkv->value.leaf.len = -1; |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 702 | /* Don't add Extended ROM leafs in the |
| 703 | * layout list, they are handled |
| 704 | * differently. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 705 | break; |
| 706 | } |
| 707 | |
| 708 | /* Add to tail of list */ |
| 709 | dkv->next = NULL; |
| 710 | dkv->prev = *layout_tail; |
| 711 | (*layout_tail)->next = dkv; |
| 712 | *layout_tail = dkv; |
| 713 | break; |
| 714 | } |
| 715 | } |
| 716 | } |
| 717 | return num_entries; |
| 718 | } |
| 719 | |
Stefan Richter | 6c88e47 | 2007-03-11 22:47:34 +0100 | [diff] [blame] | 720 | static size_t csr1212_generate_layout_order(struct csr1212_keyval *kv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 721 | { |
| 722 | struct csr1212_keyval *ltail = kv; |
| 723 | size_t agg_size = 0; |
| 724 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 725 | while (kv) { |
| 726 | switch (kv->key.type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 727 | case CSR1212_KV_TYPE_LEAF: |
| 728 | /* Add 1 quadlet for crc/len field */ |
| 729 | agg_size += kv->value.leaf.len + 1; |
| 730 | break; |
| 731 | |
| 732 | case CSR1212_KV_TYPE_DIRECTORY: |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 733 | kv->value.directory.len = |
| 734 | csr1212_generate_layout_subdir(kv, <ail); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 735 | /* Add 1 quadlet for crc/len field */ |
| 736 | agg_size += kv->value.directory.len + 1; |
| 737 | break; |
| 738 | } |
| 739 | kv = kv->next; |
| 740 | } |
| 741 | return quads_to_bytes(agg_size); |
| 742 | } |
| 743 | |
Stefan Richter | 6c88e47 | 2007-03-11 22:47:34 +0100 | [diff] [blame] | 744 | static struct csr1212_keyval * |
| 745 | csr1212_generate_positions(struct csr1212_csr_rom_cache *cache, |
| 746 | struct csr1212_keyval *start_kv, int start_pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 747 | { |
| 748 | struct csr1212_keyval *kv = start_kv; |
| 749 | struct csr1212_keyval *okv = start_kv; |
| 750 | int pos = start_pos; |
| 751 | int kv_len = 0, okv_len = 0; |
| 752 | |
| 753 | cache->layout_head = kv; |
| 754 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 755 | while (kv && pos < cache->size) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | /* Special case: Extended ROM leafs */ |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 757 | if (kv->key.id != CSR1212_KV_ID_EXTENDED_ROM) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 758 | kv->offset = cache->offset + pos; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 760 | switch (kv->key.type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 761 | case CSR1212_KV_TYPE_LEAF: |
| 762 | kv_len = kv->value.leaf.len; |
| 763 | break; |
| 764 | |
| 765 | case CSR1212_KV_TYPE_DIRECTORY: |
| 766 | kv_len = kv->value.directory.len; |
| 767 | break; |
| 768 | |
| 769 | default: |
| 770 | /* Should never get here */ |
Stefan Richter | c94ccf9 | 2007-03-14 00:27:46 +0100 | [diff] [blame] | 771 | WARN_ON(1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 772 | break; |
| 773 | } |
| 774 | |
| 775 | pos += quads_to_bytes(kv_len + 1); |
| 776 | |
| 777 | if (pos <= cache->size) { |
| 778 | okv = kv; |
| 779 | okv_len = kv_len; |
| 780 | kv = kv->next; |
| 781 | } |
| 782 | } |
| 783 | |
| 784 | cache->layout_tail = okv; |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 785 | cache->len = okv->offset - cache->offset + quads_to_bytes(okv_len + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 786 | |
| 787 | return kv; |
| 788 | } |
| 789 | |
Stefan Richter | 6c88e47 | 2007-03-11 22:47:34 +0100 | [diff] [blame] | 790 | #define CSR1212_KV_KEY_SHIFT 24 |
| 791 | #define CSR1212_KV_KEY_TYPE_SHIFT 6 |
| 792 | #define CSR1212_KV_KEY_ID_MASK 0x3f |
| 793 | #define CSR1212_KV_KEY_TYPE_MASK 0x3 /* after shift */ |
| 794 | |
| 795 | static void |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 796 | csr1212_generate_tree_subdir(struct csr1212_keyval *dir, u32 *data_buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | { |
| 798 | struct csr1212_dentry *dentry; |
| 799 | struct csr1212_keyval *last_extkey_spec = NULL; |
| 800 | struct csr1212_keyval *last_extkey = NULL; |
| 801 | int index = 0; |
| 802 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 803 | for (dentry = dir->value.directory.dentries_head; |
| 804 | dentry; |
| 805 | dentry = dentry->next) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 806 | struct csr1212_keyval *a; |
| 807 | |
| 808 | for (a = dentry->kv; a; a = a->associate) { |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 809 | u32 value = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | |
| 811 | /* Special Case: Extended Key Specifier_ID */ |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 812 | if (a->key.id == |
| 813 | CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID) { |
| 814 | if (last_extkey_spec == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 815 | last_extkey_spec = a; |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 816 | else if (a->value.immediate != |
| 817 | last_extkey_spec->value.immediate) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | last_extkey_spec = a; |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 819 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | continue; |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 821 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | /* Special Case: Extended Key */ |
| 823 | } else if (a->key.id == CSR1212_KV_ID_EXTENDED_KEY) { |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 824 | if (last_extkey == NULL) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | last_extkey = a; |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 826 | else if (a->value.immediate != |
| 827 | last_extkey->value.immediate) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 828 | last_extkey = a; |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 829 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 830 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 831 | } |
| 832 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 833 | switch (a->key.type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 834 | case CSR1212_KV_TYPE_IMMEDIATE: |
| 835 | value = a->value.immediate; |
| 836 | break; |
| 837 | case CSR1212_KV_TYPE_CSR_OFFSET: |
| 838 | value = a->value.csr_offset; |
| 839 | break; |
| 840 | case CSR1212_KV_TYPE_LEAF: |
| 841 | value = a->offset; |
| 842 | value -= dir->offset + quads_to_bytes(1+index); |
| 843 | value = bytes_to_quads(value); |
| 844 | break; |
| 845 | case CSR1212_KV_TYPE_DIRECTORY: |
| 846 | value = a->offset; |
| 847 | value -= dir->offset + quads_to_bytes(1+index); |
| 848 | value = bytes_to_quads(value); |
| 849 | break; |
| 850 | default: |
| 851 | /* Should never get here */ |
Stefan Richter | c94ccf9 | 2007-03-14 00:27:46 +0100 | [diff] [blame] | 852 | WARN_ON(1); |
| 853 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | } |
| 855 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 856 | value |= (a->key.id & CSR1212_KV_KEY_ID_MASK) << |
| 857 | CSR1212_KV_KEY_SHIFT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 858 | value |= (a->key.type & CSR1212_KV_KEY_TYPE_MASK) << |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 859 | (CSR1212_KV_KEY_SHIFT + |
| 860 | CSR1212_KV_KEY_TYPE_SHIFT); |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 861 | data_buffer[index] = cpu_to_be32(value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 862 | index++; |
| 863 | } |
| 864 | } |
| 865 | } |
| 866 | |
Stefan Richter | 6c88e47 | 2007-03-11 22:47:34 +0100 | [diff] [blame] | 867 | struct csr1212_keyval_img { |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 868 | u16 length; |
| 869 | u16 crc; |
Stefan Richter | 6c88e47 | 2007-03-11 22:47:34 +0100 | [diff] [blame] | 870 | |
| 871 | /* Must be last */ |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 872 | u32 data[0]; /* older gcc can't handle [] which is standard */ |
Stefan Richter | 6c88e47 | 2007-03-11 22:47:34 +0100 | [diff] [blame] | 873 | }; |
| 874 | |
| 875 | static void csr1212_fill_cache(struct csr1212_csr_rom_cache *cache) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 876 | { |
| 877 | struct csr1212_keyval *kv, *nkv; |
| 878 | struct csr1212_keyval_img *kvi; |
| 879 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 880 | for (kv = cache->layout_head; |
| 881 | kv != cache->layout_tail->next; |
| 882 | kv = nkv) { |
| 883 | kvi = (struct csr1212_keyval_img *)(cache->data + |
| 884 | bytes_to_quads(kv->offset - cache->offset)); |
| 885 | switch (kv->key.type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 886 | default: |
| 887 | case CSR1212_KV_TYPE_IMMEDIATE: |
| 888 | case CSR1212_KV_TYPE_CSR_OFFSET: |
| 889 | /* Should never get here */ |
Stefan Richter | c94ccf9 | 2007-03-14 00:27:46 +0100 | [diff] [blame] | 890 | WARN_ON(1); |
| 891 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 892 | |
| 893 | case CSR1212_KV_TYPE_LEAF: |
| 894 | /* Don't copy over Extended ROM areas, they are |
| 895 | * already filled out! */ |
| 896 | if (kv->key.id != CSR1212_KV_ID_EXTENDED_ROM) |
| 897 | memcpy(kvi->data, kv->value.leaf.data, |
| 898 | quads_to_bytes(kv->value.leaf.len)); |
| 899 | |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 900 | kvi->length = cpu_to_be16(kv->value.leaf.len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | kvi->crc = csr1212_crc16(kvi->data, kv->value.leaf.len); |
| 902 | break; |
| 903 | |
| 904 | case CSR1212_KV_TYPE_DIRECTORY: |
| 905 | csr1212_generate_tree_subdir(kv, kvi->data); |
| 906 | |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 907 | kvi->length = cpu_to_be16(kv->value.directory.len); |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 908 | kvi->crc = csr1212_crc16(kvi->data, |
| 909 | kv->value.directory.len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 910 | break; |
| 911 | } |
| 912 | |
| 913 | nkv = kv->next; |
| 914 | if (kv->prev) |
| 915 | kv->prev->next = NULL; |
| 916 | if (kv->next) |
| 917 | kv->next->prev = NULL; |
| 918 | kv->prev = NULL; |
| 919 | kv->next = NULL; |
| 920 | } |
| 921 | } |
| 922 | |
Stefan Richter | fd2f3bd | 2007-03-11 22:51:24 +0100 | [diff] [blame] | 923 | /* This size is arbitrarily chosen. |
| 924 | * The struct overhead is subtracted for more economic allocations. */ |
| 925 | #define CSR1212_EXTENDED_ROM_SIZE (2048 - sizeof(struct csr1212_csr_rom_cache)) |
Stefan Richter | 6c88e47 | 2007-03-11 22:47:34 +0100 | [diff] [blame] | 926 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | int csr1212_generate_csr_image(struct csr1212_csr *csr) |
| 928 | { |
| 929 | struct csr1212_bus_info_block_img *bi; |
| 930 | struct csr1212_csr_rom_cache *cache; |
| 931 | struct csr1212_keyval *kv; |
| 932 | size_t agg_size; |
| 933 | int ret; |
| 934 | int init_offset; |
| 935 | |
Stefan Richter | 64ff712 | 2007-03-11 22:50:13 +0100 | [diff] [blame] | 936 | BUG_ON(!csr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | |
| 938 | cache = csr->cache_head; |
| 939 | |
| 940 | bi = (struct csr1212_bus_info_block_img*)cache->data; |
| 941 | |
| 942 | bi->length = bytes_to_quads(csr->bus_info_len) - 1; |
| 943 | bi->crc_length = bi->length; |
| 944 | bi->crc = csr1212_crc16(bi->data, bi->crc_length); |
| 945 | |
| 946 | csr->root_kv->next = NULL; |
| 947 | csr->root_kv->prev = NULL; |
| 948 | |
| 949 | agg_size = csr1212_generate_layout_order(csr->root_kv); |
| 950 | |
| 951 | init_offset = csr->bus_info_len; |
| 952 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 953 | for (kv = csr->root_kv, cache = csr->cache_head; |
| 954 | kv; |
| 955 | cache = cache->next) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 956 | if (!cache) { |
| 957 | /* Estimate approximate number of additional cache |
| 958 | * regions needed (it assumes that the cache holding |
| 959 | * the first 1K Config ROM space always exists). */ |
| 960 | int est_c = agg_size / (CSR1212_EXTENDED_ROM_SIZE - |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 961 | (2 * sizeof(u32))) + 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | |
| 963 | /* Add additional cache regions, extras will be |
| 964 | * removed later */ |
| 965 | for (; est_c; est_c--) { |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 966 | ret = csr1212_append_new_cache(csr, |
| 967 | CSR1212_EXTENDED_ROM_SIZE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 968 | if (ret != CSR1212_SUCCESS) |
| 969 | return ret; |
| 970 | } |
| 971 | /* Need to re-layout for additional cache regions */ |
| 972 | agg_size = csr1212_generate_layout_order(csr->root_kv); |
| 973 | kv = csr->root_kv; |
| 974 | cache = csr->cache_head; |
| 975 | init_offset = csr->bus_info_len; |
| 976 | } |
| 977 | kv = csr1212_generate_positions(cache, kv, init_offset); |
| 978 | agg_size -= cache->len; |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 979 | init_offset = sizeof(u32); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 980 | } |
| 981 | |
| 982 | /* Remove unused, excess cache regions */ |
| 983 | while (cache) { |
| 984 | struct csr1212_csr_rom_cache *oc = cache; |
| 985 | |
| 986 | cache = cache->next; |
| 987 | csr1212_remove_cache(csr, oc); |
| 988 | } |
| 989 | |
| 990 | /* Go through the list backward so that when done, the correct CRC |
| 991 | * will be calculated for the Extended ROM areas. */ |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 992 | for (cache = csr->cache_tail; cache; cache = cache->prev) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 993 | /* Only Extended ROM caches should have this set. */ |
| 994 | if (cache->ext_rom) { |
| 995 | int leaf_size; |
| 996 | |
| 997 | /* Make sure the Extended ROM leaf is a multiple of |
| 998 | * max_rom in size. */ |
Stefan Richter | 64ff712 | 2007-03-11 22:50:13 +0100 | [diff] [blame] | 999 | BUG_ON(csr->max_rom < 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | leaf_size = (cache->len + (csr->max_rom - 1)) & |
| 1001 | ~(csr->max_rom - 1); |
| 1002 | |
| 1003 | /* Zero out the unused ROM region */ |
| 1004 | memset(cache->data + bytes_to_quads(cache->len), 0x00, |
| 1005 | leaf_size - cache->len); |
| 1006 | |
| 1007 | /* Subtract leaf header */ |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 1008 | leaf_size -= sizeof(u32); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1009 | |
| 1010 | /* Update the Extended ROM leaf length */ |
| 1011 | cache->ext_rom->value.leaf.len = |
| 1012 | bytes_to_quads(leaf_size); |
| 1013 | } else { |
| 1014 | /* Zero out the unused ROM region */ |
| 1015 | memset(cache->data + bytes_to_quads(cache->len), 0x00, |
| 1016 | cache->size - cache->len); |
| 1017 | } |
| 1018 | |
| 1019 | /* Copy the data into the cache buffer */ |
| 1020 | csr1212_fill_cache(cache); |
| 1021 | |
| 1022 | if (cache != csr->cache_head) { |
| 1023 | /* Set the length and CRC of the extended ROM. */ |
| 1024 | struct csr1212_keyval_img *kvi = |
| 1025 | (struct csr1212_keyval_img*)cache->data; |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 1026 | u16 len = bytes_to_quads(cache->len) - 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1028 | kvi->length = cpu_to_be16(len); |
| 1029 | kvi->crc = csr1212_crc16(kvi->data, len); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1030 | } |
| 1031 | } |
| 1032 | |
| 1033 | return CSR1212_SUCCESS; |
| 1034 | } |
| 1035 | |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 1036 | int csr1212_read(struct csr1212_csr *csr, u32 offset, void *buffer, u32 len) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1037 | { |
| 1038 | struct csr1212_csr_rom_cache *cache; |
| 1039 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 1040 | for (cache = csr->cache_head; cache; cache = cache->next) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1041 | if (offset >= cache->offset && |
| 1042 | (offset + len) <= (cache->offset + cache->size)) { |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 1043 | memcpy(buffer, &cache->data[ |
| 1044 | bytes_to_quads(offset - cache->offset)], |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1045 | len); |
| 1046 | return CSR1212_SUCCESS; |
| 1047 | } |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 1048 | |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1049 | return -ENOENT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1050 | } |
| 1051 | |
| 1052 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1053 | /* Parse a chunk of data as a Config ROM */ |
| 1054 | |
| 1055 | static int csr1212_parse_bus_info_block(struct csr1212_csr *csr) |
| 1056 | { |
| 1057 | struct csr1212_bus_info_block_img *bi; |
| 1058 | struct csr1212_cache_region *cr; |
| 1059 | int i; |
| 1060 | int ret; |
| 1061 | |
| 1062 | /* IEEE 1212 says that the entire bus info block should be readable in |
| 1063 | * a single transaction regardless of the max_rom value. |
| 1064 | * Unfortunately, many IEEE 1394 devices do not abide by that, so the |
| 1065 | * bus info block will be read 1 quadlet at a time. The rest of the |
| 1066 | * ConfigROM will be read according to the max_rom field. */ |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 1067 | for (i = 0; i < csr->bus_info_len; i += sizeof(u32)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | ret = csr->ops->bus_read(csr, CSR1212_CONFIG_ROM_SPACE_BASE + i, |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 1069 | sizeof(u32), &csr->cache_head->data[bytes_to_quads(i)], |
| 1070 | csr->private); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1071 | if (ret != CSR1212_SUCCESS) |
| 1072 | return ret; |
Stefan Richter | b2051f8 | 2007-01-03 19:32:13 +0100 | [diff] [blame] | 1073 | |
| 1074 | /* check ROM header's info_length */ |
| 1075 | if (i == 0 && |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1076 | be32_to_cpu(csr->cache_head->data[0]) >> 24 != |
Stefan Richter | b2051f8 | 2007-01-03 19:32:13 +0100 | [diff] [blame] | 1077 | bytes_to_quads(csr->bus_info_len) - 1) |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1078 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1079 | } |
| 1080 | |
| 1081 | bi = (struct csr1212_bus_info_block_img*)csr->cache_head->data; |
| 1082 | csr->crc_len = quads_to_bytes(bi->crc_length); |
| 1083 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 1084 | /* IEEE 1212 recommends that crc_len be equal to bus_info_len, but that |
| 1085 | * is not always the case, so read the rest of the crc area 1 quadlet at |
| 1086 | * a time. */ |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 1087 | for (i = csr->bus_info_len; i <= csr->crc_len; i += sizeof(u32)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | ret = csr->ops->bus_read(csr, CSR1212_CONFIG_ROM_SPACE_BASE + i, |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 1089 | sizeof(u32), &csr->cache_head->data[bytes_to_quads(i)], |
| 1090 | csr->private); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1091 | if (ret != CSR1212_SUCCESS) |
| 1092 | return ret; |
| 1093 | } |
| 1094 | |
Stefan Richter | d265250 | 2007-03-14 00:29:20 +0100 | [diff] [blame] | 1095 | /* Apparently there are many different wrong implementations of the CRC |
| 1096 | * algorithm. We don't fail, we just warn. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1097 | if ((csr1212_crc16(bi->data, bi->crc_length) != bi->crc) && |
| 1098 | (csr1212_msft_crc16(bi->data, bi->crc_length) != bi->crc)) |
Stefan Richter | d265250 | 2007-03-14 00:29:20 +0100 | [diff] [blame] | 1099 | printk(KERN_DEBUG "IEEE 1394 device has ROM CRC error\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1100 | |
Stefan Richter | 8551158 | 2005-11-07 06:31:45 -0500 | [diff] [blame] | 1101 | cr = CSR1212_MALLOC(sizeof(*cr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | if (!cr) |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1103 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1104 | |
| 1105 | cr->next = NULL; |
| 1106 | cr->prev = NULL; |
| 1107 | cr->offset_start = 0; |
| 1108 | cr->offset_end = csr->crc_len + 4; |
| 1109 | |
| 1110 | csr->cache_head->filled_head = cr; |
| 1111 | csr->cache_head->filled_tail = cr; |
| 1112 | |
| 1113 | return CSR1212_SUCCESS; |
| 1114 | } |
| 1115 | |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1116 | #define CSR1212_KV_KEY(q) (be32_to_cpu(q) >> CSR1212_KV_KEY_SHIFT) |
Stefan Richter | 6c88e47 | 2007-03-11 22:47:34 +0100 | [diff] [blame] | 1117 | #define CSR1212_KV_KEY_TYPE(q) (CSR1212_KV_KEY(q) >> CSR1212_KV_KEY_TYPE_SHIFT) |
| 1118 | #define CSR1212_KV_KEY_ID(q) (CSR1212_KV_KEY(q) & CSR1212_KV_KEY_ID_MASK) |
| 1119 | #define CSR1212_KV_VAL_MASK 0xffffff |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1120 | #define CSR1212_KV_VAL(q) (be32_to_cpu(q) & CSR1212_KV_VAL_MASK) |
Stefan Richter | 6c88e47 | 2007-03-11 22:47:34 +0100 | [diff] [blame] | 1121 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 1122 | static int |
| 1123 | csr1212_parse_dir_entry(struct csr1212_keyval *dir, u32 ki, u32 kv_pos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | { |
| 1125 | int ret = CSR1212_SUCCESS; |
| 1126 | struct csr1212_keyval *k = NULL; |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 1127 | u32 offset; |
Stefan Richter | 17a19b7 | 2007-09-15 14:50:25 +0200 | [diff] [blame] | 1128 | bool keep_keyval = true; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1129 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 1130 | switch (CSR1212_KV_KEY_TYPE(ki)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | case CSR1212_KV_TYPE_IMMEDIATE: |
| 1132 | k = csr1212_new_immediate(CSR1212_KV_KEY_ID(ki), |
| 1133 | CSR1212_KV_VAL(ki)); |
| 1134 | if (!k) { |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1135 | ret = -ENOMEM; |
Stefan Richter | 511f7b3 | 2007-03-14 00:28:36 +0100 | [diff] [blame] | 1136 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1137 | } |
Stefan Richter | 17a19b7 | 2007-09-15 14:50:25 +0200 | [diff] [blame] | 1138 | /* Don't keep local reference when parsing. */ |
| 1139 | keep_keyval = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1140 | break; |
| 1141 | |
| 1142 | case CSR1212_KV_TYPE_CSR_OFFSET: |
| 1143 | k = csr1212_new_csr_offset(CSR1212_KV_KEY_ID(ki), |
| 1144 | CSR1212_KV_VAL(ki)); |
| 1145 | if (!k) { |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1146 | ret = -ENOMEM; |
Stefan Richter | 511f7b3 | 2007-03-14 00:28:36 +0100 | [diff] [blame] | 1147 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1148 | } |
Stefan Richter | 17a19b7 | 2007-09-15 14:50:25 +0200 | [diff] [blame] | 1149 | /* Don't keep local reference when parsing. */ |
| 1150 | keep_keyval = false; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1151 | break; |
| 1152 | |
| 1153 | default: |
| 1154 | /* Compute the offset from 0xffff f000 0000. */ |
| 1155 | offset = quads_to_bytes(CSR1212_KV_VAL(ki)) + kv_pos; |
| 1156 | if (offset == kv_pos) { |
| 1157 | /* Uh-oh. Can't have a relative offset of 0 for Leaves |
| 1158 | * or Directories. The Config ROM image is most likely |
| 1159 | * messed up, so we'll just abort here. */ |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1160 | ret = -EIO; |
Stefan Richter | 511f7b3 | 2007-03-14 00:28:36 +0100 | [diff] [blame] | 1161 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1162 | } |
| 1163 | |
| 1164 | k = csr1212_find_keyval_offset(dir, offset); |
| 1165 | |
| 1166 | if (k) |
| 1167 | break; /* Found it. */ |
| 1168 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 1169 | if (CSR1212_KV_KEY_TYPE(ki) == CSR1212_KV_TYPE_DIRECTORY) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1170 | k = csr1212_new_directory(CSR1212_KV_KEY_ID(ki)); |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 1171 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | k = csr1212_new_leaf(CSR1212_KV_KEY_ID(ki), NULL, 0); |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 1173 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1174 | if (!k) { |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1175 | ret = -ENOMEM; |
Stefan Richter | 511f7b3 | 2007-03-14 00:28:36 +0100 | [diff] [blame] | 1176 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1177 | } |
Stefan Richter | 17a19b7 | 2007-09-15 14:50:25 +0200 | [diff] [blame] | 1178 | /* Don't keep local reference when parsing. */ |
| 1179 | keep_keyval = false; |
| 1180 | /* Contents not read yet so it's not valid. */ |
| 1181 | k->valid = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | k->offset = offset; |
| 1183 | |
| 1184 | k->prev = dir; |
| 1185 | k->next = dir->next; |
| 1186 | dir->next->prev = k; |
| 1187 | dir->next = k; |
| 1188 | } |
Stefan Richter | 17a19b7 | 2007-09-15 14:50:25 +0200 | [diff] [blame] | 1189 | ret = __csr1212_attach_keyval_to_directory(dir, k, keep_keyval); |
Stefan Richter | 511f7b3 | 2007-03-14 00:28:36 +0100 | [diff] [blame] | 1190 | out: |
Stefan Richter | 6c88e47 | 2007-03-11 22:47:34 +0100 | [diff] [blame] | 1191 | if (ret != CSR1212_SUCCESS && k != NULL) |
| 1192 | free_keyval(k); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | return ret; |
| 1194 | } |
| 1195 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1196 | int csr1212_parse_keyval(struct csr1212_keyval *kv, |
| 1197 | struct csr1212_csr_rom_cache *cache) |
| 1198 | { |
| 1199 | struct csr1212_keyval_img *kvi; |
| 1200 | int i; |
| 1201 | int ret = CSR1212_SUCCESS; |
| 1202 | int kvi_len; |
| 1203 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 1204 | kvi = (struct csr1212_keyval_img*) |
| 1205 | &cache->data[bytes_to_quads(kv->offset - cache->offset)]; |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1206 | kvi_len = be16_to_cpu(kvi->length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1207 | |
Stefan Richter | d265250 | 2007-03-14 00:29:20 +0100 | [diff] [blame] | 1208 | /* Apparently there are many different wrong implementations of the CRC |
| 1209 | * algorithm. We don't fail, we just warn. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1210 | if ((csr1212_crc16(kvi->data, kvi_len) != kvi->crc) && |
Stefan Richter | d265250 | 2007-03-14 00:29:20 +0100 | [diff] [blame] | 1211 | (csr1212_msft_crc16(kvi->data, kvi_len) != kvi->crc)) |
| 1212 | printk(KERN_DEBUG "IEEE 1394 device has ROM CRC error\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 1214 | switch (kv->key.type) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1215 | case CSR1212_KV_TYPE_DIRECTORY: |
| 1216 | for (i = 0; i < kvi_len; i++) { |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 1217 | u32 ki = kvi->data[i]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1218 | |
| 1219 | /* Some devices put null entries in their unit |
| 1220 | * directories. If we come across such an entry, |
| 1221 | * then skip it. */ |
| 1222 | if (ki == 0x0) |
| 1223 | continue; |
| 1224 | ret = csr1212_parse_dir_entry(kv, ki, |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 1225 | kv->offset + quads_to_bytes(i + 1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1226 | } |
| 1227 | kv->value.directory.len = kvi_len; |
| 1228 | break; |
| 1229 | |
| 1230 | case CSR1212_KV_TYPE_LEAF: |
| 1231 | if (kv->key.id != CSR1212_KV_ID_EXTENDED_ROM) { |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 1232 | size_t size = quads_to_bytes(kvi_len); |
| 1233 | |
| 1234 | kv->value.leaf.data = CSR1212_MALLOC(size); |
Stefan Richter | 8551158 | 2005-11-07 06:31:45 -0500 | [diff] [blame] | 1235 | if (!kv->value.leaf.data) { |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1236 | ret = -ENOMEM; |
Stefan Richter | 511f7b3 | 2007-03-14 00:28:36 +0100 | [diff] [blame] | 1237 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1238 | } |
| 1239 | |
| 1240 | kv->value.leaf.len = kvi_len; |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 1241 | memcpy(kv->value.leaf.data, kvi->data, size); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1242 | } |
| 1243 | break; |
| 1244 | } |
| 1245 | |
| 1246 | kv->valid = 1; |
Stefan Richter | 511f7b3 | 2007-03-14 00:28:36 +0100 | [diff] [blame] | 1247 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1248 | return ret; |
| 1249 | } |
| 1250 | |
Stefan Richter | c1a37f2 | 2007-03-14 00:20:53 +0100 | [diff] [blame] | 1251 | static int |
| 1252 | csr1212_read_keyval(struct csr1212_csr *csr, struct csr1212_keyval *kv) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1253 | { |
| 1254 | struct csr1212_cache_region *cr, *ncr, *newcr = NULL; |
| 1255 | struct csr1212_keyval_img *kvi = NULL; |
| 1256 | struct csr1212_csr_rom_cache *cache; |
| 1257 | int cache_index; |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 1258 | u64 addr; |
| 1259 | u32 *cache_ptr; |
| 1260 | u16 kv_len = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1261 | |
Stefan Richter | 64ff712 | 2007-03-11 22:50:13 +0100 | [diff] [blame] | 1262 | BUG_ON(!csr || !kv || csr->max_rom < 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1263 | |
| 1264 | /* First find which cache the data should be in (or go in if not read |
| 1265 | * yet). */ |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 1266 | for (cache = csr->cache_head; cache; cache = cache->next) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1267 | if (kv->offset >= cache->offset && |
| 1268 | kv->offset < (cache->offset + cache->size)) |
| 1269 | break; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1270 | |
| 1271 | if (!cache) { |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 1272 | u32 q, cache_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | |
| 1274 | /* Only create a new cache for Extended ROM leaves. */ |
| 1275 | if (kv->key.id != CSR1212_KV_ID_EXTENDED_ROM) |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1276 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | |
| 1278 | if (csr->ops->bus_read(csr, |
| 1279 | CSR1212_REGISTER_SPACE_BASE + kv->offset, |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 1280 | sizeof(u32), &q, csr->private)) |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1281 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1282 | |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1283 | kv->value.leaf.len = be32_to_cpu(q) >> 16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | |
| 1285 | cache_size = (quads_to_bytes(kv->value.leaf.len + 1) + |
| 1286 | (csr->max_rom - 1)) & ~(csr->max_rom - 1); |
| 1287 | |
| 1288 | cache = csr1212_rom_cache_malloc(kv->offset, cache_size); |
| 1289 | if (!cache) |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1290 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1291 | |
| 1292 | kv->value.leaf.data = &cache->data[1]; |
| 1293 | csr->cache_tail->next = cache; |
| 1294 | cache->prev = csr->cache_tail; |
| 1295 | cache->next = NULL; |
| 1296 | csr->cache_tail = cache; |
| 1297 | cache->filled_head = |
Stefan Richter | 8551158 | 2005-11-07 06:31:45 -0500 | [diff] [blame] | 1298 | CSR1212_MALLOC(sizeof(*cache->filled_head)); |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 1299 | if (!cache->filled_head) |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1300 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1301 | |
| 1302 | cache->filled_head->offset_start = 0; |
Stefan Richter | 982610b | 2007-03-11 22:49:34 +0100 | [diff] [blame] | 1303 | cache->filled_head->offset_end = sizeof(u32); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | cache->filled_tail = cache->filled_head; |
| 1305 | cache->filled_head->next = NULL; |
| 1306 | cache->filled_head->prev = NULL; |
| 1307 | cache->data[0] = q; |
| 1308 | |
| 1309 | /* Don't read the entire extended ROM now. Pieces of it will |
| 1310 | * be read when entries inside it are read. */ |
| 1311 | return csr1212_parse_keyval(kv, cache); |
| 1312 | } |
| 1313 | |
| 1314 | cache_index = kv->offset - cache->offset; |
| 1315 | |
| 1316 | /* Now seach read portions of the cache to see if it is there. */ |
| 1317 | for (cr = cache->filled_head; cr; cr = cr->next) { |
| 1318 | if (cache_index < cr->offset_start) { |
Stefan Richter | 8551158 | 2005-11-07 06:31:45 -0500 | [diff] [blame] | 1319 | newcr = CSR1212_MALLOC(sizeof(*newcr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1320 | if (!newcr) |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1321 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1322 | |
| 1323 | newcr->offset_start = cache_index & ~(csr->max_rom - 1); |
| 1324 | newcr->offset_end = newcr->offset_start; |
| 1325 | newcr->next = cr; |
| 1326 | newcr->prev = cr->prev; |
| 1327 | cr->prev = newcr; |
| 1328 | cr = newcr; |
| 1329 | break; |
| 1330 | } else if ((cache_index >= cr->offset_start) && |
| 1331 | (cache_index < cr->offset_end)) { |
| 1332 | kvi = (struct csr1212_keyval_img*) |
| 1333 | (&cache->data[bytes_to_quads(cache_index)]); |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1334 | kv_len = quads_to_bytes(be16_to_cpu(kvi->length) + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1335 | break; |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 1336 | } else if (cache_index == cr->offset_end) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1337 | break; |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 1338 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1339 | } |
| 1340 | |
| 1341 | if (!cr) { |
| 1342 | cr = cache->filled_tail; |
Stefan Richter | 8551158 | 2005-11-07 06:31:45 -0500 | [diff] [blame] | 1343 | newcr = CSR1212_MALLOC(sizeof(*newcr)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1344 | if (!newcr) |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1345 | return -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1346 | |
| 1347 | newcr->offset_start = cache_index & ~(csr->max_rom - 1); |
| 1348 | newcr->offset_end = newcr->offset_start; |
| 1349 | newcr->prev = cr; |
| 1350 | newcr->next = cr->next; |
| 1351 | cr->next = newcr; |
| 1352 | cr = newcr; |
| 1353 | cache->filled_tail = newcr; |
| 1354 | } |
| 1355 | |
| 1356 | while(!kvi || cr->offset_end < cache_index + kv_len) { |
| 1357 | cache_ptr = &cache->data[bytes_to_quads(cr->offset_end & |
| 1358 | ~(csr->max_rom - 1))]; |
| 1359 | |
| 1360 | addr = (CSR1212_CSR_ARCH_REG_SPACE_BASE + cache->offset + |
| 1361 | cr->offset_end) & ~(csr->max_rom - 1); |
| 1362 | |
| 1363 | if (csr->ops->bus_read(csr, addr, csr->max_rom, cache_ptr, |
| 1364 | csr->private)) { |
| 1365 | if (csr->max_rom == 4) |
| 1366 | /* We've got problems! */ |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1367 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1368 | |
| 1369 | /* Apperently the max_rom value was a lie, set it to |
| 1370 | * do quadlet reads and try again. */ |
| 1371 | csr->max_rom = 4; |
| 1372 | continue; |
| 1373 | } |
| 1374 | |
| 1375 | cr->offset_end += csr->max_rom - (cr->offset_end & |
| 1376 | (csr->max_rom - 1)); |
| 1377 | |
| 1378 | if (!kvi && (cr->offset_end > cache_index)) { |
| 1379 | kvi = (struct csr1212_keyval_img*) |
| 1380 | (&cache->data[bytes_to_quads(cache_index)]); |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1381 | kv_len = quads_to_bytes(be16_to_cpu(kvi->length) + 1); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1382 | } |
| 1383 | |
| 1384 | if ((kv_len + (kv->offset - cache->offset)) > cache->size) { |
| 1385 | /* The Leaf or Directory claims its length extends |
| 1386 | * beyond the ConfigROM image region and thus beyond the |
| 1387 | * end of our cache region. Therefore, we abort now |
| 1388 | * rather than seg faulting later. */ |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1389 | return -EIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1390 | } |
| 1391 | |
| 1392 | ncr = cr->next; |
| 1393 | |
| 1394 | if (ncr && (cr->offset_end >= ncr->offset_start)) { |
| 1395 | /* consolidate region entries */ |
| 1396 | ncr->offset_start = cr->offset_start; |
| 1397 | |
| 1398 | if (cr->prev) |
| 1399 | cr->prev->next = cr->next; |
| 1400 | ncr->prev = cr->prev; |
| 1401 | if (cache->filled_head == cr) |
| 1402 | cache->filled_head = ncr; |
| 1403 | CSR1212_FREE(cr); |
| 1404 | cr = ncr; |
| 1405 | } |
| 1406 | } |
| 1407 | |
| 1408 | return csr1212_parse_keyval(kv, cache); |
| 1409 | } |
| 1410 | |
Stefan Richter | c1a37f2 | 2007-03-14 00:20:53 +0100 | [diff] [blame] | 1411 | struct csr1212_keyval * |
| 1412 | csr1212_get_keyval(struct csr1212_csr *csr, struct csr1212_keyval *kv) |
| 1413 | { |
| 1414 | if (!kv) |
| 1415 | return NULL; |
| 1416 | if (!kv->valid) |
| 1417 | if (csr1212_read_keyval(csr, kv) != CSR1212_SUCCESS) |
| 1418 | return NULL; |
| 1419 | return kv; |
| 1420 | } |
| 1421 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1422 | int csr1212_parse_csr(struct csr1212_csr *csr) |
| 1423 | { |
| 1424 | static const int mr_map[] = { 4, 64, 1024, 0 }; |
| 1425 | struct csr1212_dentry *dentry; |
| 1426 | int ret; |
| 1427 | |
Stefan Richter | 64ff712 | 2007-03-11 22:50:13 +0100 | [diff] [blame] | 1428 | BUG_ON(!csr || !csr->ops || !csr->ops->bus_read); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1429 | |
| 1430 | ret = csr1212_parse_bus_info_block(csr); |
| 1431 | if (ret != CSR1212_SUCCESS) |
| 1432 | return ret; |
| 1433 | |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 1434 | if (!csr->ops->get_max_rom) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1435 | csr->max_rom = mr_map[0]; /* default value */ |
Stefan Richter | c868ae2 | 2007-03-14 00:26:38 +0100 | [diff] [blame] | 1436 | } else { |
Ben Collins | 1934b8b | 2005-07-09 20:01:23 -0400 | [diff] [blame] | 1437 | int i = csr->ops->get_max_rom(csr->bus_info_data, |
| 1438 | csr->private); |
| 1439 | if (i & ~0x3) |
Stefan Richter | 7fb9add | 2007-03-11 22:49:05 +0100 | [diff] [blame] | 1440 | return -EINVAL; |
Ben Collins | 1934b8b | 2005-07-09 20:01:23 -0400 | [diff] [blame] | 1441 | csr->max_rom = mr_map[i]; |
| 1442 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1443 | |
| 1444 | csr->cache_head->layout_head = csr->root_kv; |
| 1445 | csr->cache_head->layout_tail = csr->root_kv; |
| 1446 | |
| 1447 | csr->root_kv->offset = (CSR1212_CONFIG_ROM_SPACE_BASE & 0xffff) + |
| 1448 | csr->bus_info_len; |
| 1449 | |
| 1450 | csr->root_kv->valid = 0; |
| 1451 | csr->root_kv->next = csr->root_kv; |
| 1452 | csr->root_kv->prev = csr->root_kv; |
Stefan Richter | c1a37f2 | 2007-03-14 00:20:53 +0100 | [diff] [blame] | 1453 | ret = csr1212_read_keyval(csr, csr->root_kv); |
Jody McIntyre | 5303a98 | 2005-11-22 12:17:11 -0500 | [diff] [blame] | 1454 | if (ret != CSR1212_SUCCESS) |
| 1455 | return ret; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1456 | |
| 1457 | /* Scan through the Root directory finding all extended ROM regions |
| 1458 | * and make cache regions for them */ |
| 1459 | for (dentry = csr->root_kv->value.directory.dentries_head; |
| 1460 | dentry; dentry = dentry->next) { |
Jody McIntyre | a96074e | 2005-11-22 12:17:14 -0500 | [diff] [blame] | 1461 | if (dentry->kv->key.id == CSR1212_KV_ID_EXTENDED_ROM && |
| 1462 | !dentry->kv->valid) { |
Stefan Richter | c1a37f2 | 2007-03-14 00:20:53 +0100 | [diff] [blame] | 1463 | ret = csr1212_read_keyval(csr, dentry->kv); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1464 | if (ret != CSR1212_SUCCESS) |
| 1465 | return ret; |
| 1466 | } |
| 1467 | } |
| 1468 | |
| 1469 | return CSR1212_SUCCESS; |
| 1470 | } |