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path: root/drivers/ieee1394/csr1212.c
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Diffstat (limited to 'drivers/ieee1394/csr1212.c')
-rw-r--r--drivers/ieee1394/csr1212.c1467
1 files changed, 0 insertions, 1467 deletions
diff --git a/drivers/ieee1394/csr1212.c b/drivers/ieee1394/csr1212.c
deleted file mode 100644
index e76cac64c53..00000000000
--- a/drivers/ieee1394/csr1212.c
+++ /dev/null
@@ -1,1467 +0,0 @@
-/*
- * csr1212.c -- IEEE 1212 Control and Status Register support for Linux
- *
- * Copyright (C) 2003 Francois Retief <fgretief@sun.ac.za>
- * Steve Kinneberg <kinnebergsteve@acmsystems.com>
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. The name of the author may not be used to endorse or promote products
- * derived from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
- * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
- * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
- * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
- * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
- * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
- * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-
-/* TODO List:
- * - Verify interface consistency: i.e., public functions that take a size
- * parameter expect size to be in bytes.
- */
-
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/kmemcheck.h>
-#include <linux/string.h>
-#include <asm/bug.h>
-#include <asm/byteorder.h>
-
-#include "csr1212.h"
-
-
-/* Permitted key type for each key id */
-#define __I (1 << CSR1212_KV_TYPE_IMMEDIATE)
-#define __C (1 << CSR1212_KV_TYPE_CSR_OFFSET)
-#define __D (1 << CSR1212_KV_TYPE_DIRECTORY)
-#define __L (1 << CSR1212_KV_TYPE_LEAF)
-static const u8 csr1212_key_id_type_map[0x30] = {
- __C, /* used by Apple iSight */
- __D | __L, /* Descriptor */
- __I | __D | __L, /* Bus_Dependent_Info */
- __I | __D | __L, /* Vendor */
- __I, /* Hardware_Version */
- 0, 0, /* Reserved */
- __D | __L | __I, /* Module */
- __I, 0, 0, 0, /* used by Apple iSight, Reserved */
- __I, /* Node_Capabilities */
- __L, /* EUI_64 */
- 0, 0, 0, /* Reserved */
- __D, /* Unit */
- __I, /* Specifier_ID */
- __I, /* Version */
- __I | __C | __D | __L, /* Dependent_Info */
- __L, /* Unit_Location */
- 0, /* Reserved */
- __I, /* Model */
- __D, /* Instance */
- __L, /* Keyword */
- __D, /* Feature */
- __L, /* Extended_ROM */
- __I, /* Extended_Key_Specifier_ID */
- __I, /* Extended_Key */
- __I | __C | __D | __L, /* Extended_Data */
- __L, /* Modifiable_Descriptor */
- __I, /* Directory_ID */
- __I, /* Revision */
-};
-#undef __I
-#undef __C
-#undef __D
-#undef __L
-
-
-#define quads_to_bytes(_q) ((_q) * sizeof(u32))
-#define bytes_to_quads(_b) DIV_ROUND_UP(_b, sizeof(u32))
-
-static void free_keyval(struct csr1212_keyval *kv)
-{
- if ((kv->key.type == CSR1212_KV_TYPE_LEAF) &&
- (kv->key.id != CSR1212_KV_ID_EXTENDED_ROM))
- CSR1212_FREE(kv->value.leaf.data);
-
- CSR1212_FREE(kv);
-}
-
-static u16 csr1212_crc16(const u32 *buffer, size_t length)
-{
- int shift;
- u32 data;
- u16 sum, crc = 0;
-
- for (; length; length--) {
- data = be32_to_cpu(*buffer);
- buffer++;
- for (shift = 28; shift >= 0; shift -= 4 ) {
- sum = ((crc >> 12) ^ (data >> shift)) & 0xf;
- crc = (crc << 4) ^ (sum << 12) ^ (sum << 5) ^ (sum);
- }
- crc &= 0xffff;
- }
-
- return cpu_to_be16(crc);
-}
-
-/* Microsoft computes the CRC with the bytes in reverse order. */
-static u16 csr1212_msft_crc16(const u32 *buffer, size_t length)
-{
- int shift;
- u32 data;
- u16 sum, crc = 0;
-
- for (; length; length--) {
- data = le32_to_cpu(*buffer);
- buffer++;
- for (shift = 28; shift >= 0; shift -= 4 ) {
- sum = ((crc >> 12) ^ (data >> shift)) & 0xf;
- crc = (crc << 4) ^ (sum << 12) ^ (sum << 5) ^ (sum);
- }
- crc &= 0xffff;
- }
-
- return cpu_to_be16(crc);
-}
-
-static struct csr1212_dentry *
-csr1212_find_keyval(struct csr1212_keyval *dir, struct csr1212_keyval *kv)
-{
- struct csr1212_dentry *pos;
-
- for (pos = dir->value.directory.dentries_head;
- pos != NULL; pos = pos->next)
- if (pos->kv == kv)
- return pos;
- return NULL;
-}
-
-static struct csr1212_keyval *
-csr1212_find_keyval_offset(struct csr1212_keyval *kv_list, u32 offset)
-{
- struct csr1212_keyval *kv;
-
- for (kv = kv_list->next; kv && (kv != kv_list); kv = kv->next)
- if (kv->offset == offset)
- return kv;
- return NULL;
-}
-
-
-/* Creation Routines */
-
-struct csr1212_csr *csr1212_create_csr(struct csr1212_bus_ops *ops,
- size_t bus_info_size, void *private)
-{
- struct csr1212_csr *csr;
-
- csr = CSR1212_MALLOC(sizeof(*csr));
- if (!csr)
- return NULL;
-
- csr->cache_head =
- csr1212_rom_cache_malloc(CSR1212_CONFIG_ROM_SPACE_OFFSET,
- CSR1212_CONFIG_ROM_SPACE_SIZE);
- if (!csr->cache_head) {
- CSR1212_FREE(csr);
- return NULL;
- }
-
- /* The keyval key id is not used for the root node, but a valid key id
- * that can be used for a directory needs to be passed to
- * csr1212_new_directory(). */
- csr->root_kv = csr1212_new_directory(CSR1212_KV_ID_VENDOR);
- if (!csr->root_kv) {
- CSR1212_FREE(csr->cache_head);
- CSR1212_FREE(csr);
- return NULL;
- }
-
- csr->bus_info_data = csr->cache_head->data;
- csr->bus_info_len = bus_info_size;
- csr->crc_len = bus_info_size;
- csr->ops = ops;
- csr->private = private;
- csr->cache_tail = csr->cache_head;
-
- return csr;
-}
-
-void csr1212_init_local_csr(struct csr1212_csr *csr,
- const u32 *bus_info_data, int max_rom)
-{
- static const int mr_map[] = { 4, 64, 1024, 0 };
-
- BUG_ON(max_rom & ~0x3);
- csr->max_rom = mr_map[max_rom];
- memcpy(csr->bus_info_data, bus_info_data, csr->bus_info_len);
-}
-
-static struct csr1212_keyval *csr1212_new_keyval(u8 type, u8 key)
-{
- struct csr1212_keyval *kv;
-
- if (key < 0x30 && ((csr1212_key_id_type_map[key] & (1 << type)) == 0))
- return NULL;
-
- kv = CSR1212_MALLOC(sizeof(*kv));
- if (!kv)
- return NULL;
-
- atomic_set(&kv->refcnt, 1);
- kv->key.type = type;
- kv->key.id = key;
- kv->associate = NULL;
- kv->next = NULL;
- kv->prev = NULL;
- kv->offset = 0;
- kv->valid = 0;
- return kv;
-}
-
-struct csr1212_keyval *csr1212_new_immediate(u8 key, u32 value)
-{
- struct csr1212_keyval *kv;
-
- kv = csr1212_new_keyval(CSR1212_KV_TYPE_IMMEDIATE, key);
- if (!kv)
- return NULL;
-
- kv->value.immediate = value;
- kv->valid = 1;
- return kv;
-}
-
-static struct csr1212_keyval *
-csr1212_new_leaf(u8 key, const void *data, size_t data_len)
-{
- struct csr1212_keyval *kv;
-
- kv = csr1212_new_keyval(CSR1212_KV_TYPE_LEAF, key);
- if (!kv)
- return NULL;
-
- if (data_len > 0) {
- kv->value.leaf.data = CSR1212_MALLOC(data_len);
- if (!kv->value.leaf.data) {
- CSR1212_FREE(kv);
- return NULL;
- }
-
- if (data)
- memcpy(kv->value.leaf.data, data, data_len);
- } else {
- kv->value.leaf.data = NULL;
- }
-
- kv->value.leaf.len = bytes_to_quads(data_len);
- kv->offset = 0;
- kv->valid = 1;
-
- return kv;
-}
-
-static struct csr1212_keyval *
-csr1212_new_csr_offset(u8 key, u32 csr_offset)
-{
- struct csr1212_keyval *kv;
-
- kv = csr1212_new_keyval(CSR1212_KV_TYPE_CSR_OFFSET, key);
- if (!kv)
- return NULL;
-
- kv->value.csr_offset = csr_offset;
-
- kv->offset = 0;
- kv->valid = 1;
- return kv;
-}
-
-struct csr1212_keyval *csr1212_new_directory(u8 key)
-{
- struct csr1212_keyval *kv;
-
- kv = csr1212_new_keyval(CSR1212_KV_TYPE_DIRECTORY, key);
- if (!kv)
- return NULL;
-
- kv->value.directory.len = 0;
- kv->offset = 0;
- kv->value.directory.dentries_head = NULL;
- kv->value.directory.dentries_tail = NULL;
- kv->valid = 1;
- return kv;
-}
-
-void csr1212_associate_keyval(struct csr1212_keyval *kv,
- struct csr1212_keyval *associate)
-{
- BUG_ON(!kv || !associate || kv->key.id == CSR1212_KV_ID_DESCRIPTOR ||
- (associate->key.id != CSR1212_KV_ID_DESCRIPTOR &&
- associate->key.id != CSR1212_KV_ID_DEPENDENT_INFO &&
- associate->key.id != CSR1212_KV_ID_EXTENDED_KEY &&
- associate->key.id != CSR1212_KV_ID_EXTENDED_DATA &&
- associate->key.id < 0x30) ||
- (kv->key.id == CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID &&
- associate->key.id != CSR1212_KV_ID_EXTENDED_KEY) ||
- (kv->key.id == CSR1212_KV_ID_EXTENDED_KEY &&
- associate->key.id != CSR1212_KV_ID_EXTENDED_DATA) ||
- (associate->key.id == CSR1212_KV_ID_EXTENDED_KEY &&
- kv->key.id != CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID) ||
- (associate->key.id == CSR1212_KV_ID_EXTENDED_DATA &&
- kv->key.id != CSR1212_KV_ID_EXTENDED_KEY));
-
- if (kv->associate)
- csr1212_release_keyval(kv->associate);
-
- csr1212_keep_keyval(associate);
- kv->associate = associate;
-}
-
-static int __csr1212_attach_keyval_to_directory(struct csr1212_keyval *dir,
- struct csr1212_keyval *kv,
- bool keep_keyval)
-{
- struct csr1212_dentry *dentry;
-
- BUG_ON(!kv || !dir || dir->key.type != CSR1212_KV_TYPE_DIRECTORY);
-
- dentry = CSR1212_MALLOC(sizeof(*dentry));
- if (!dentry)
- return -ENOMEM;
-
- if (keep_keyval)
- csr1212_keep_keyval(kv);
- dentry->kv = kv;
-
- dentry->next = NULL;
- dentry->prev = dir->value.directory.dentries_tail;
-
- if (!dir->value.directory.dentries_head)
- dir->value.directory.dentries_head = dentry;
-
- if (dir->value.directory.dentries_tail)
- dir->value.directory.dentries_tail->next = dentry;
- dir->value.directory.dentries_tail = dentry;
-
- return CSR1212_SUCCESS;
-}
-
-int csr1212_attach_keyval_to_directory(struct csr1212_keyval *dir,
- struct csr1212_keyval *kv)
-{
- return __csr1212_attach_keyval_to_directory(dir, kv, true);
-}
-
-#define CSR1212_DESCRIPTOR_LEAF_DATA(kv) \
- (&((kv)->value.leaf.data[1]))
-
-#define CSR1212_DESCRIPTOR_LEAF_SET_TYPE(kv, type) \
- ((kv)->value.leaf.data[0] = \
- cpu_to_be32(CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID(kv) | \
- ((type) << CSR1212_DESCRIPTOR_LEAF_TYPE_SHIFT)))
-#define CSR1212_DESCRIPTOR_LEAF_SET_SPECIFIER_ID(kv, spec_id) \
- ((kv)->value.leaf.data[0] = \
- cpu_to_be32((CSR1212_DESCRIPTOR_LEAF_TYPE(kv) << \
- CSR1212_DESCRIPTOR_LEAF_TYPE_SHIFT) | \
- ((spec_id) & CSR1212_DESCRIPTOR_LEAF_SPECIFIER_ID_MASK)))
-
-static struct csr1212_keyval *
-csr1212_new_descriptor_leaf(u8 dtype, u32 specifier_id,
- const void *data, size_t data_len)
-{
- struct csr1212_keyval *kv;
-
- kv = csr1212_new_leaf(CSR1212_KV_ID_DESCRIPTOR, NULL,
- data_len + CSR1212_DESCRIPTOR_LEAF_OVERHEAD);
- if (!kv)
- return NULL;
-
- kmemcheck_annotate_variable(kv->value.leaf.data[0]);
- CSR1212_DESCRIPTOR_LEAF_SET_TYPE(kv, dtype);
- CSR1212_DESCRIPTOR_LEAF_SET_SPECIFIER_ID(kv, specifier_id);
-
- if (data)
- memcpy(CSR1212_DESCRIPTOR_LEAF_DATA(kv), data, data_len);
-
- return kv;
-}
-
-/* Check if string conforms to minimal ASCII as per IEEE 1212 clause 7.4 */
-static int csr1212_check_minimal_ascii(const char *s)
-{
- static const char minimal_ascii_table[] = {
- /* 1 2 4 8 16 32 64 128 */
- 128, /* --, --, --, --, --, --, --, 07, */
- 4 + 16 + 32, /* --, --, 0a, --, 0C, 0D, --, --, */
- 0, /* --, --, --, --, --, --, --, --, */
- 0, /* --, --, --, --, --, --, --, --, */
- 255 - 8 - 16, /* 20, 21, 22, --, --, 25, 26, 27, */
- 255, /* 28, 29, 2a, 2b, 2c, 2d, 2e, 2f, */
- 255, /* 30, 31, 32, 33, 34, 35, 36, 37, */
- 255, /* 38, 39, 3a, 3b, 3c, 3d, 3e, 3f, */
- 255, /* 40, 41, 42, 43, 44, 45, 46, 47, */
- 255, /* 48, 49, 4a, 4b, 4c, 4d, 4e, 4f, */
- 255, /* 50, 51, 52, 53, 54, 55, 56, 57, */
- 1 + 2 + 4 + 128, /* 58, 59, 5a, --, --, --, --, 5f, */
- 255 - 1, /* --, 61, 62, 63, 64, 65, 66, 67, */
- 255, /* 68, 69, 6a, 6b, 6c, 6d, 6e, 6f, */
- 255, /* 70, 71, 72, 73, 74, 75, 76, 77, */
- 1 + 2 + 4, /* 78, 79, 7a, --, --, --, --, --, */
- };
- int i, j;
-
- for (; *s; s++) {
- i = *s >> 3; /* i = *s / 8; */
- j = 1 << (*s & 3); /* j = 1 << (*s % 8); */
-
- if (i >= ARRAY_SIZE(minimal_ascii_table) ||
- !(minimal_ascii_table[i] & j))
- return -EINVAL;
- }
- return 0;
-}
-
-/* IEEE 1212 clause 7.5.4.1 textual descriptors (English, minimal ASCII) */
-struct csr1212_keyval *csr1212_new_string_descriptor_leaf(const char *s)
-{
- struct csr1212_keyval *kv;
- u32 *text;
- size_t str_len, quads;
-
- if (!s || !*s || csr1212_check_minimal_ascii(s))
- return NULL;
-
- str_len = strlen(s);
- quads = bytes_to_quads(str_len);
- kv = csr1212_new_descriptor_leaf(0, 0, NULL, quads_to_bytes(quads) +
- CSR1212_TEXTUAL_DESCRIPTOR_LEAF_OVERHEAD);
- if (!kv)
- return NULL;
-
- kv->value.leaf.data[1] = 0; /* width, character_set, language */
- text = CSR1212_TEXTUAL_DESCRIPTOR_LEAF_DATA(kv);
- text[quads - 1] = 0; /* padding */
- memcpy(text, s, str_len);
-
- return kv;
-}
-
-
-/* Destruction Routines */
-
-void csr1212_detach_keyval_from_directory(struct csr1212_keyval *dir,
- struct csr1212_keyval *kv)
-{
- struct csr1212_dentry *dentry;
-
- if (!kv || !dir || dir->key.type != CSR1212_KV_TYPE_DIRECTORY)
- return;
-
- dentry = csr1212_find_keyval(dir, kv);
-
- if (!dentry)
- return;
-
- if (dentry->prev)
- dentry->prev->next = dentry->next;
- if (dentry->next)
- dentry->next->prev = dentry->prev;
- if (dir->value.directory.dentries_head == dentry)
- dir->value.directory.dentries_head = dentry->next;
- if (dir->value.directory.dentries_tail == dentry)
- dir->value.directory.dentries_tail = dentry->prev;
-
- CSR1212_FREE(dentry);
-
- csr1212_release_keyval(kv);
-}
-
-/* This function is used to free the memory taken by a keyval. If the given
- * keyval is a directory type, then any keyvals contained in that directory
- * will be destroyed as well if noone holds a reference on them. By means of
- * list manipulation, this routine will descend a directory structure in a
- * non-recursive manner. */
-void csr1212_release_keyval(struct csr1212_keyval *kv)
-{
- struct csr1212_keyval *k, *a;
- struct csr1212_dentry dentry;
- struct csr1212_dentry *head, *tail;
-
- if (!atomic_dec_and_test(&kv->refcnt))
- return;
-
- dentry.kv = kv;
- dentry.next = NULL;
- dentry.prev = NULL;
-
- head = &dentry;
- tail = head;
-
- while (head) {
- k = head->kv;
-
- while (k) {
- /* must not dec_and_test kv->refcnt again */
- if (k != kv && !atomic_dec_and_test(&k->refcnt))
- break;
-
- a = k->associate;
-
- if (k->key.type == CSR1212_KV_TYPE_DIRECTORY) {
- /* If the current entry is a directory, move all
- * the entries to the destruction list. */
- if (k->value.directory.dentries_head) {
- tail->next =
- k->value.directory.dentries_head;
- k->value.directory.dentries_head->prev =
- tail;
- tail = k->value.directory.dentries_tail;
- }
- }
- free_keyval(k);
- k = a;
- }
-
- head = head->next;
- if (head) {
- if (head->prev && head->prev != &dentry)
- CSR1212_FREE(head->prev);
- head->prev = NULL;
- } else if (tail != &dentry) {
- CSR1212_FREE(tail);
- }
- }
-}
-
-void csr1212_destroy_csr(struct csr1212_csr *csr)
-{
- struct csr1212_csr_rom_cache *c, *oc;
- struct csr1212_cache_region *cr, *ocr;
-
- csr1212_release_keyval(csr->root_kv);
-
- c = csr->cache_head;
- while (c) {
- oc = c;
- cr = c->filled_head;
- while (cr) {
- ocr = cr;
- cr = cr->next;
- CSR1212_FREE(ocr);
- }
- c = c->next;
- CSR1212_FREE(oc);
- }
-
- CSR1212_FREE(csr);
-}
-
-
-/* CSR Image Creation */
-
-static int csr1212_append_new_cache(struct csr1212_csr *csr, size_t romsize)
-{
- struct csr1212_csr_rom_cache *cache;
- u64 csr_addr;
-
- BUG_ON(!csr || !csr->ops || !csr->ops->allocate_addr_range ||
- !csr->ops->release_addr || csr->max_rom < 1);
-
- /* ROM size must be a multiple of csr->max_rom */
- romsize = (romsize + (csr->max_rom - 1)) & ~(csr->max_rom - 1);
-
- csr_addr = csr->ops->allocate_addr_range(romsize, csr->max_rom,
- csr->private);
- if (csr_addr == CSR1212_INVALID_ADDR_SPACE)
- return -ENOMEM;
-
- if (csr_addr < CSR1212_REGISTER_SPACE_BASE) {
- /* Invalid address returned from allocate_addr_range(). */
- csr->ops->release_addr(csr_addr, csr->private);
- return -ENOMEM;
- }
-
- cache = csr1212_rom_cache_malloc(csr_addr - CSR1212_REGISTER_SPACE_BASE,
- romsize);
- if (!cache) {
- csr->ops->release_addr(csr_addr, csr->private);
- return -ENOMEM;
- }
-
- cache->ext_rom = csr1212_new_keyval(CSR1212_KV_TYPE_LEAF,
- CSR1212_KV_ID_EXTENDED_ROM);
- if (!cache->ext_rom) {
- csr->ops->release_addr(csr_addr, csr->private);
- CSR1212_FREE(cache);
- return -ENOMEM;
- }
-
- if (csr1212_attach_keyval_to_directory(csr->root_kv, cache->ext_rom) !=
- CSR1212_SUCCESS) {
- csr1212_release_keyval(cache->ext_rom);
- csr->ops->release_addr(csr_addr, csr->private);
- CSR1212_FREE(cache);
- return -ENOMEM;
- }
- cache->ext_rom->offset = csr_addr - CSR1212_REGISTER_SPACE_BASE;
- cache->ext_rom->value.leaf.len = -1;
- cache->ext_rom->value.leaf.data = cache->data;
-
- /* Add cache to tail of cache list */
- cache->prev = csr->cache_tail;
- csr->cache_tail->next = cache;
- csr->cache_tail = cache;
- return CSR1212_SUCCESS;
-}
-
-static void csr1212_remove_cache(struct csr1212_csr *csr,
- struct csr1212_csr_rom_cache *cache)
-{
- if (csr->cache_head == cache)
- csr->cache_head = cache->next;
- if (csr->cache_tail == cache)
- csr->cache_tail = cache->prev;
-
- if (cache->prev)
- cache->prev->next = cache->next;
- if (cache->next)
- cache->next->prev = cache->prev;
-
- if (cache->ext_rom) {
- csr1212_detach_keyval_from_directory(csr->root_kv,
- cache->ext_rom);
- csr1212_release_keyval(cache->ext_rom);
- }
-
- CSR1212_FREE(cache);
-}
-
-static int csr1212_generate_layout_subdir(struct csr1212_keyval *dir,
- struct csr1212_keyval **layout_tail)
-{
- struct csr1212_dentry *dentry;
- struct csr1212_keyval *dkv;
- struct csr1212_keyval *last_extkey_spec = NULL;
- struct csr1212_keyval *last_extkey = NULL;
- int num_entries = 0;
-
- for (dentry = dir->value.directory.dentries_head; dentry;
- dentry = dentry->next) {
- for (dkv = dentry->kv; dkv; dkv = dkv->associate) {
- /* Special Case: Extended Key Specifier_ID */
- if (dkv->key.id ==
- CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID) {
- if (last_extkey_spec == NULL)
- last_extkey_spec = dkv;
- else if (dkv->value.immediate !=
- last_extkey_spec->value.immediate)
- last_extkey_spec = dkv;
- else
- continue;
- /* Special Case: Extended Key */
- } else if (dkv->key.id == CSR1212_KV_ID_EXTENDED_KEY) {
- if (last_extkey == NULL)
- last_extkey = dkv;
- else if (dkv->value.immediate !=
- last_extkey->value.immediate)
- last_extkey = dkv;
- else
- continue;
- }
-
- num_entries += 1;
-
- switch (dkv->key.type) {
- default:
- case CSR1212_KV_TYPE_IMMEDIATE:
- case CSR1212_KV_TYPE_CSR_OFFSET:
- break;
- case CSR1212_KV_TYPE_LEAF:
- case CSR1212_KV_TYPE_DIRECTORY:
- /* Remove from list */
- if (dkv->prev && (dkv->prev->next == dkv))
- dkv->prev->next = dkv->next;
- if (dkv->next && (dkv->next->prev == dkv))
- dkv->next->prev = dkv->prev;
- //if (dkv == *layout_tail)
- // *layout_tail = dkv->prev;
-
- /* Special case: Extended ROM leafs */
- if (dkv->key.id == CSR1212_KV_ID_EXTENDED_ROM) {
- dkv->value.leaf.len = -1;
- /* Don't add Extended ROM leafs in the
- * layout list, they are handled
- * differently. */
- break;
- }
-
- /* Add to tail of list */
- dkv->next = NULL;
- dkv->prev = *layout_tail;
- (*layout_tail)->next = dkv;
- *layout_tail = dkv;
- break;
- }
- }
- }
- return num_entries;
-}
-
-static size_t csr1212_generate_layout_order(struct csr1212_keyval *kv)
-{
- struct csr1212_keyval *ltail = kv;
- size_t agg_size = 0;
-
- while (kv) {
- switch (kv->key.type) {
- case CSR1212_KV_TYPE_LEAF:
- /* Add 1 quadlet for crc/len field */
- agg_size += kv->value.leaf.len + 1;
- break;
-
- case CSR1212_KV_TYPE_DIRECTORY:
- kv->value.directory.len =
- csr1212_generate_layout_subdir(kv, &ltail);
- /* Add 1 quadlet for crc/len field */
- agg_size += kv->value.directory.len + 1;
- break;
- }
- kv = kv->next;
- }
- return quads_to_bytes(agg_size);
-}
-
-static struct csr1212_keyval *
-csr1212_generate_positions(struct csr1212_csr_rom_cache *cache,
- struct csr1212_keyval *start_kv, int start_pos)
-{
- struct csr1212_keyval *kv = start_kv;
- struct csr1212_keyval *okv = start_kv;
- int pos = start_pos;
- int kv_len = 0, okv_len = 0;
-
- cache->layout_head = kv;
-
- while (kv && pos < cache->size) {
- /* Special case: Extended ROM leafs */
- if (kv->key.id != CSR1212_KV_ID_EXTENDED_ROM)
- kv->offset = cache->offset + pos;
-
- switch (kv->key.type) {
- case CSR1212_KV_TYPE_LEAF:
- kv_len = kv->value.leaf.len;
- break;
-
- case CSR1212_KV_TYPE_DIRECTORY:
- kv_len = kv->value.directory.len;
- break;
-
- default:
- /* Should never get here */
- WARN_ON(1);
- break;
- }
-
- pos += quads_to_bytes(kv_len + 1);
-
- if (pos <= cache->size) {
- okv = kv;
- okv_len = kv_len;
- kv = kv->next;
- }
- }
-
- cache->layout_tail = okv;
- cache->len = okv->offset - cache->offset + quads_to_bytes(okv_len + 1);
-
- return kv;
-}
-
-#define CSR1212_KV_KEY_SHIFT 24
-#define CSR1212_KV_KEY_TYPE_SHIFT 6
-#define CSR1212_KV_KEY_ID_MASK 0x3f
-#define CSR1212_KV_KEY_TYPE_MASK 0x3 /* after shift */
-
-static void
-csr1212_generate_tree_subdir(struct csr1212_keyval *dir, u32 *data_buffer)
-{
- struct csr1212_dentry *dentry;
- struct csr1212_keyval *last_extkey_spec = NULL;
- struct csr1212_keyval *last_extkey = NULL;
- int index = 0;
-
- for (dentry = dir->value.directory.dentries_head;
- dentry;
- dentry = dentry->next) {
- struct csr1212_keyval *a;
-
- for (a = dentry->kv; a; a = a->associate) {
- u32 value = 0;
-
- /* Special Case: Extended Key Specifier_ID */
- if (a->key.id ==
- CSR1212_KV_ID_EXTENDED_KEY_SPECIFIER_ID) {
- if (last_extkey_spec == NULL)
- last_extkey_spec = a;
- else if (a->value.immediate !=
- last_extkey_spec->value.immediate)
- last_extkey_spec = a;
- else
- continue;
-
- /* Special Case: Extended Key */
- } else if (a->key.id == CSR1212_KV_ID_EXTENDED_KEY) {
- if (last_extkey == NULL)
- last_extkey = a;
- else if (a->value.immediate !=
- last_extkey->value.immediate)
- last_extkey = a;
- else
- continue;
- }
-
- switch (a->key.type) {
- case CSR1212_KV_TYPE_IMMEDIATE:
- value = a->value.immediate;
- break;
- case CSR1212_KV_TYPE_CSR_OFFSET:
- value = a->value.csr_offset;
- break;
- case CSR1212_KV_TYPE_LEAF:
- value = a->offset;
- value -= dir->offset + quads_to_bytes(1+index);
- value = bytes_to_quads(value);
- break;
- case CSR1212_KV_TYPE_DIRECTORY:
- value = a->offset;
- value -= dir->offset + quads_to_bytes(1+index);
- value = bytes_to_quads(value);
- break;
- default:
- /* Should never get here */
- WARN_ON(1);
- break;
- }
-
- value |= (a->key.id & CSR1212_KV_KEY_ID_MASK) <<
- CSR1212_KV_KEY_SHIFT;
- value |= (a->key.type & CSR1212_KV_KEY_TYPE_MASK) <<
- (CSR1212_KV_KEY_SHIFT +
- CSR1212_KV_KEY_TYPE_SHIFT);
- data_buffer[index] = cpu_to_be32(value);
- index++;
- }
- }
-}
-
-struct csr1212_keyval_img {
- u16 length;
- u16 crc;
-
- /* Must be last */
- u32 data[0]; /* older gcc can't handle [] which is standard */
-};
-
-static void csr1212_fill_cache(struct csr1212_csr_rom_cache *cache)
-{
- struct csr1212_keyval *kv, *nkv;
- struct csr1212_keyval_img *kvi;
-
- for (kv = cache->layout_head;
- kv != cache->layout_tail->next;
- kv = nkv) {
- kvi = (struct csr1212_keyval_img *)(cache->data +
- bytes_to_quads(kv->offset - cache->offset));
- switch (kv->key.type) {
- default:
- case CSR1212_KV_TYPE_IMMEDIATE:
- case CSR1212_KV_TYPE_CSR_OFFSET:
- /* Should never get here */
- WARN_ON(1);
- break;
-
- case CSR1212_KV_TYPE_LEAF:
- /* Don't copy over Extended ROM areas, they are
- * already filled out! */
- if (kv->key.id != CSR1212_KV_ID_EXTENDED_ROM)
- memcpy(kvi->data, kv->value.leaf.data,
- quads_to_bytes(kv->value.leaf.len));
-
- kvi->length = cpu_to_be16(kv->value.leaf.len);
- kvi->crc = csr1212_crc16(kvi->data, kv->value.leaf.len);
- break;
-
- case CSR1212_KV_TYPE_DIRECTORY:
- csr1212_generate_tree_subdir(kv, kvi->data);
-
- kvi->length = cpu_to_be16(kv->value.directory.len);
- kvi->crc = csr1212_crc16(kvi->data,
- kv->value.directory.len);
- break;
- }
-
- nkv = kv->next;
- if (kv->prev)
- kv->prev->next = NULL;
- if (kv->next)
- kv->next->prev = NULL;
- kv->prev = NULL;
- kv->next = NULL;
- }
-}
-
-/* This size is arbitrarily chosen.
- * The struct overhead is subtracted for more economic allocations. */
-#define CSR1212_EXTENDED_ROM_SIZE (2048 - sizeof(struct csr1212_csr_rom_cache))
-
-int csr1212_generate_csr_image(struct csr1212_csr *csr)
-{
- struct csr1212_bus_info_block_img *bi;
- struct csr1212_csr_rom_cache *cache;
- struct csr1212_keyval *kv;
- size_t agg_size;
- int ret;
- int init_offset;
-
- BUG_ON(!csr);
-
- cache = csr->cache_head;
-
- bi = (struct csr1212_bus_info_block_img*)cache->data;
-
- bi->length = bytes_to_quads(csr->bus_info_len) - 1;
- bi->crc_length = bi->length;
- bi->crc = csr1212_crc16(bi->data, bi->crc_length);
-
- csr->root_kv->next = NULL;
- csr->root_kv->prev = NULL;
-
- agg_size = csr1212_generate_layout_order(csr->root_kv);
-
- init_offset = csr->bus_info_len;
-
- for (kv = csr->root_kv, cache = csr->cache_head;
- kv;
- cache = cache->next) {
- if (!cache) {
- /* Estimate approximate number of additional cache
- * regions needed (it assumes that the cache holding
- * the first 1K Config ROM space always exists). */
- int est_c = agg_size / (CSR1212_EXTENDED_ROM_SIZE -
- (2 * sizeof(u32))) + 1;
-
- /* Add additional cache regions, extras will be
- * removed later */
- for (; est_c; est_c--) {
- ret = csr1212_append_new_cache(csr,
- CSR1212_EXTENDED_ROM_SIZE);
- if (ret != CSR1212_SUCCESS)
- return ret;
- }
- /* Need to re-layout for additional cache regions */
- agg_size = csr1212_generate_layout_order(csr->root_kv);
- kv = csr->root_kv;
- cache = csr->cache_head;
- init_offset = csr->bus_info_len;
- }
- kv = csr1212_generate_positions(cache, kv, init_offset);
- agg_size -= cache->len;
- init_offset = sizeof(u32);
- }
-
- /* Remove unused, excess cache regions */
- while (cache) {
- struct csr1212_csr_rom_cache *oc = cache;
-
- cache = cache->next;
- csr1212_remove_cache(csr, oc);
- }
-
- /* Go through the list backward so that when done, the correct CRC
- * will be calculated for the Extended ROM areas. */
- for (cache = csr->cache_tail; cache; cache = cache->prev) {
- /* Only Extended ROM caches should have this set. */
- if (cache->ext_rom) {
- int leaf_size;
-
- /* Make sure the Extended ROM leaf is a multiple of
- * max_rom in size. */
- BUG_ON(csr->max_rom < 1);
- leaf_size = (cache->len + (csr->max_rom - 1)) &
- ~(csr->max_rom - 1);
-
- /* Zero out the unused ROM region */
- memset(cache->data + bytes_to_quads(cache->len), 0x00,
- leaf_size - cache->len);
-
- /* Subtract leaf header */
- leaf_size -= sizeof(u32);
-
- /* Update the Extended ROM leaf length */
- cache->ext_rom->value.leaf.len =
- bytes_to_quads(leaf_size);
- } else {
- /* Zero out the unused ROM region */
- memset(cache->data + bytes_to_quads(cache->len), 0x00,
- cache->size - cache->len);
- }
-
- /* Copy the data into the cache buffer */
- csr1212_fill_cache(cache);
-
- if (cache != csr->cache_head) {
- /* Set the length and CRC of the extended ROM. */
- struct csr1212_keyval_img *kvi =
- (struct csr1212_keyval_img*)cache->data;
- u16 len = bytes_to_quads(cache->len) - 1;
-
- kvi->length = cpu_to_be16(len);
- kvi->crc = csr1212_crc16(kvi->data, len);
- }
- }
-
- return CSR1212_SUCCESS;
-}
-
-int csr1212_read(struct csr1212_csr *csr, u32 offset, void *buffer, u32 len)
-{
- struct csr1212_csr_rom_cache *cache;
-
- for (cache = csr->cache_head; cache; cache = cache->next)
- if (offset >= cache->offset &&
- (offset + len) <= (cache->offset + cache->size)) {
- memcpy(buffer, &cache->data[
- bytes_to_quads(offset - cache->offset)],
- len);
- return CSR1212_SUCCESS;
- }
-
- return -ENOENT;
-}
-
-/*
- * Apparently there are many different wrong implementations of the CRC
- * algorithm. We don't fail, we just warn... approximately once per GUID.
- */
-static void
-csr1212_check_crc(const u32 *buffer, size_t length, u16 crc, __be32 *guid)
-{
- static u64 last_bad_eui64;
- u64 eui64 = ((u64)be32_to_cpu(guid[0]) << 32) | be32_to_cpu(guid[1]);
-
- if (csr1212_crc16(buffer, length) == crc ||
- csr1212_msft_crc16(buffer, length) == crc ||
- eui64 == last_bad_eui64)
- return;
-
- printk(KERN_DEBUG "ieee1394: config ROM CRC error\n");
- last_bad_eui64 = eui64;
-}
-
-/* Parse a chunk of data as a Config ROM */
-
-static int csr1212_parse_bus_info_block(struct csr1212_csr *csr)
-{
- struct csr1212_bus_info_block_img *bi;
- struct csr1212_cache_region *cr;
- int i;
- int ret;
-
- for (i = 0; i < csr->bus_info_len; i += sizeof(u32)) {
- ret = csr->ops->bus_read(csr, CSR1212_CONFIG_ROM_SPACE_BASE + i,
- &csr->cache_head->data[bytes_to_quads(i)],
- csr->private);
- if (ret != CSR1212_SUCCESS)
- return ret;
-
- /* check ROM header's info_length */
- if (i == 0 &&
- be32_to_cpu(csr->cache_head->data[0]) >> 24 !=
- bytes_to_quads(csr->bus_info_len) - 1)
- return -EINVAL;
- }
-
- bi = (struct csr1212_bus_info_block_img*)csr->cache_head->data;
- csr->crc_len = quads_to_bytes(bi->crc_length);
-
- /* IEEE 1212 recommends that crc_len be equal to bus_info_len, but that
- * is not always the case, so read the rest of the crc area 1 quadlet at
- * a time. */
- for (i = csr->bus_info_len; i <= csr->crc_len; i += sizeof(u32)) {
- ret = csr->ops->bus_read(csr, CSR1212_CONFIG_ROM_SPACE_BASE + i,
- &csr->cache_head->data[bytes_to_quads(i)],
- csr->private);
- if (ret != CSR1212_SUCCESS)
- return ret;
- }
-
- csr1212_check_crc(bi->data, bi->crc_length, bi->crc,
- &csr->bus_info_data[3]);
-
- cr = CSR1212_MALLOC(sizeof(*cr));
- if (!cr)
- return -ENOMEM;
-
- cr->next = NULL;
- cr->prev = NULL;
- cr->offset_start = 0;
- cr->offset_end = csr->crc_len + 4;
-
- csr->cache_head->filled_head = cr;
- csr->cache_head->filled_tail = cr;
-
- return CSR1212_SUCCESS;
-}
-
-#define CSR1212_KV_KEY(q) (be32_to_cpu(q) >> CSR1212_KV_KEY_SHIFT)
-#define CSR1212_KV_KEY_TYPE(q) (CSR1212_KV_KEY(q) >> CSR1212_KV_KEY_TYPE_SHIFT)
-#define CSR1212_KV_KEY_ID(q) (CSR1212_KV_KEY(q) & CSR1212_KV_KEY_ID_MASK)
-#define CSR1212_KV_VAL_MASK 0xffffff
-#define CSR1212_KV_VAL(q) (be32_to_cpu(q) & CSR1212_KV_VAL_MASK)
-
-static int
-csr1212_parse_dir_entry(struct csr1212_keyval *dir, u32 ki, u32 kv_pos)
-{
- int ret = CSR1212_SUCCESS;
- struct csr1212_keyval *k = NULL;
- u32 offset;
- bool keep_keyval = true;
-
- switch (CSR1212_KV_KEY_TYPE(ki)) {
- case CSR1212_KV_TYPE_IMMEDIATE:
- k = csr1212_new_immediate(CSR1212_KV_KEY_ID(ki),
- CSR1212_KV_VAL(ki));
- if (!k) {
- ret = -ENOMEM;
- goto out;
- }
- /* Don't keep local reference when parsing. */
- keep_keyval = false;
- break;
-
- case CSR1212_KV_TYPE_CSR_OFFSET:
- k = csr1212_new_csr_offset(CSR1212_KV_KEY_ID(ki),
- CSR1212_KV_VAL(ki));
- if (!k) {
- ret = -ENOMEM;
- goto out;
- }
- /* Don't keep local reference when parsing. */
- keep_keyval = false;
- break;
-
- default:
- /* Compute the offset from 0xffff f000 0000. */
- offset = quads_to_bytes(CSR1212_KV_VAL(ki)) + kv_pos;
- if (offset == kv_pos) {
- /* Uh-oh. Can't have a relative offset of 0 for Leaves
- * or Directories. The Config ROM image is most likely
- * messed up, so we'll just abort here. */
- ret = -EIO;
- goto out;
- }
-
- k = csr1212_find_keyval_offset(dir, offset);
-
- if (k)
- break; /* Found it. */
-
- if (CSR1212_KV_KEY_TYPE(ki) == CSR1212_KV_TYPE_DIRECTORY)
- k = csr1212_new_directory(CSR1212_KV_KEY_ID(ki));
- else
- k = csr1212_new_leaf(CSR1212_KV_KEY_ID(ki), NULL, 0);
-
- if (!k) {
- ret = -ENOMEM;
- goto out;
- }
- /* Don't keep local reference when parsing. */
- keep_keyval = false;
- /* Contents not read yet so it's not valid. */
- k->valid = 0;
- k->offset = offset;
-
- k->prev = dir;
- k->next = dir->next;
- dir->next->prev = k;
- dir->next = k;
- }
- ret = __csr1212_attach_keyval_to_directory(dir, k, keep_keyval);
-out:
- if (ret != CSR1212_SUCCESS && k != NULL)
- free_keyval(k);
- return ret;
-}
-
-int csr1212_parse_keyval(struct csr1212_keyval *kv,
- struct csr1212_csr_rom_cache *cache)
-{
- struct csr1212_keyval_img *kvi;
- int i;
- int ret = CSR1212_SUCCESS;
- int kvi_len;
-
- kvi = (struct csr1212_keyval_img*)
- &cache->data[bytes_to_quads(kv->offset - cache->offset)];
- kvi_len = be16_to_cpu(kvi->length);
-
- /* GUID is wrong in here in case of extended ROM. We don't care. */
- csr1212_check_crc(kvi->data, kvi_len, kvi->crc, &cache->data[3]);
-
- switch (kv->key.type) {
- case CSR1212_KV_TYPE_DIRECTORY:
- for (i = 0; i < kvi_len; i++) {
- u32 ki = kvi->data[i];
-
- /* Some devices put null entries in their unit
- * directories. If we come across such an entry,
- * then skip it. */
- if (ki == 0x0)
- continue;
- ret = csr1212_parse_dir_entry(kv, ki,
- kv->offset + quads_to_bytes(i + 1));
- }
- kv->value.directory.len = kvi_len;
- break;
-
- case CSR1212_KV_TYPE_LEAF:
- if (kv->key.id != CSR1212_KV_ID_EXTENDED_ROM) {
- size_t size = quads_to_bytes(kvi_len);
-
- kv->value.leaf.data = CSR1212_MALLOC(size);
- if (!kv->value.leaf.data) {
- ret = -ENOMEM;
- goto out;
- }
-
- kv->value.leaf.len = kvi_len;
- memcpy(kv->value.leaf.data, kvi->data, size);
- }
- break;
- }
-
- kv->valid = 1;
-out:
- return ret;
-}
-
-static int
-csr1212_read_keyval(struct csr1212_csr *csr, struct csr1212_keyval *kv)
-{
- struct csr1212_cache_region *cr, *ncr, *newcr = NULL;
- struct csr1212_keyval_img *kvi = NULL;
- struct csr1212_csr_rom_cache *cache;
- int cache_index;
- u64 addr;
- u32 *cache_ptr;
- u16 kv_len = 0;
-
- BUG_ON(!csr || !kv || csr->max_rom < 1);
-
- /* First find which cache the data should be in (or go in if not read
- * yet). */
- for (cache = csr->cache_head; cache; cache = cache->next)
- if (kv->offset >= cache->offset &&
- kv->offset < (cache->offset + cache->size))
- break;
-
- if (!cache) {
- u32 q, cache_size;
-
- /* Only create a new cache for Extended ROM leaves. */
- if (kv->key.id != CSR1212_KV_ID_EXTENDED_ROM)
- return -EINVAL;
-
- if (csr->ops->bus_read(csr,
- CSR1212_REGISTER_SPACE_BASE + kv->offset,
- &q, csr->private))
- return -EIO;
-
- kv->value.leaf.len = be32_to_cpu(q) >> 16;
-
- cache_size = (quads_to_bytes(kv->value.leaf.len + 1) +
- (csr->max_rom - 1)) & ~(csr->max_rom - 1);
-
- cache = csr1212_rom_cache_malloc(kv->offset, cache_size);
- if (!cache)
- return -ENOMEM;
-
- kv->value.leaf.data = &cache->data[1];
- csr->cache_tail->next = cache;
- cache->prev = csr->cache_tail;
- cache->next = NULL;
- csr->cache_tail = cache;
- cache->filled_head =
- CSR1212_MALLOC(sizeof(*cache->filled_head));
- if (!cache->filled_head)
- return -ENOMEM;
-
- cache->filled_head->offset_start = 0;
- cache->filled_head->offset_end = sizeof(u32);
- cache->filled_tail = cache->filled_head;
- cache->filled_head->next = NULL;
- cache->filled_head->prev = NULL;
- cache->data[0] = q;
-
- /* Don't read the entire extended ROM now. Pieces of it will
- * be read when entries inside it are read. */
- return csr1212_parse_keyval(kv, cache);
- }
-
- cache_index = kv->offset - cache->offset;
-
- /* Now seach read portions of the cache to see if it is there. */
- for (cr = cache->filled_head; cr; cr = cr->next) {
- if (cache_index < cr->offset_start) {
- newcr = CSR1212_MALLOC(sizeof(*newcr));
- if (!newcr)
- return -ENOMEM;
-
- newcr->offset_start = cache_index & ~(csr->max_rom - 1);
- newcr->offset_end = newcr->offset_start;
- newcr->next = cr;
- newcr->prev = cr->prev;
- cr->prev = newcr;
- cr = newcr;
- break;
- } else if ((cache_index >= cr->offset_start) &&
- (cache_index < cr->offset_end)) {
- kvi = (struct csr1212_keyval_img*)
- (&cache->data[bytes_to_quads(cache_index)]);
- kv_len = quads_to_bytes(be16_to_cpu(kvi->length) + 1);
- break;
- } else if (cache_index == cr->offset_end) {
- break;
- }
- }
-
- if (!cr) {
- cr = cache->filled_tail;
- newcr = CSR1212_MALLOC(sizeof(*newcr));
- if (!newcr)
- return -ENOMEM;
-
- newcr->offset_start = cache_index & ~(csr->max_rom - 1);
- newcr->offset_end = newcr->offset_start;
- newcr->prev = cr;
- newcr->next = cr->next;
- cr->next = newcr;
- cr = newcr;
- cache->filled_tail = newcr;
- }
-
- while(!kvi || cr->offset_end < cache_index + kv_len) {
- cache_ptr = &cache->data[bytes_to_quads(cr->offset_end &
- ~(csr->max_rom - 1))];
-
- addr = (CSR1212_CSR_ARCH_REG_SPACE_BASE + cache->offset +
- cr->offset_end) & ~(csr->max_rom - 1);
-
- if (csr->ops->bus_read(csr, addr, cache_ptr, csr->private))
- return -EIO;
-
- cr->offset_end += csr->max_rom - (cr->offset_end &
- (csr->max_rom - 1));
-
- if (!kvi && (cr->offset_end > cache_index)) {
- kvi = (struct csr1212_keyval_img*)
- (&cache->data[bytes_to_quads(cache_index)]);
- kv_len = quads_to_bytes(be16_to_cpu(kvi->length) + 1);
- }
-
- if ((kv_len + (kv->offset - cache->offset)) > cache->size) {
- /* The Leaf or Directory claims its length extends
- * beyond the ConfigROM image region and thus beyond the
- * end of our cache region. Therefore, we abort now
- * rather than seg faulting later. */
- return -EIO;
- }
-
- ncr = cr->next;
-
- if (ncr && (cr->offset_end >= ncr->offset_start)) {
- /* consolidate region entries */
- ncr->offset_start = cr->offset_start;
-
- if (cr->prev)
- cr->prev->next = cr->next;
- ncr->prev = cr->prev;
- if (cache->filled_head == cr)
- cache->filled_head = ncr;
- CSR1212_FREE(cr);
- cr = ncr;
- }
- }
-
- return csr1212_parse_keyval(kv, cache);
-}
-
-struct csr1212_keyval *
-csr1212_get_keyval(struct csr1212_csr *csr, struct csr1212_keyval *kv)
-{
- if (!kv)
- return NULL;
- if (!kv->valid)
- if (csr1212_read_keyval(csr, kv) != CSR1212_SUCCESS)
- return NULL;
- return kv;
-}
-
-int csr1212_parse_csr(struct csr1212_csr *csr)
-{
- struct csr1212_dentry *dentry;
- int ret;
-
- BUG_ON(!csr || !csr->ops || !csr->ops->bus_read);
-
- ret = csr1212_parse_bus_info_block(csr);
- if (ret != CSR1212_SUCCESS)
- return ret;
-
- /*
- * There has been a buggy firmware with bus_info_block.max_rom > 0
- * spotted which actually only supported quadlet read requests to the
- * config ROM. Therefore read everything quadlet by quadlet regardless
- * of what the bus info block says.
- */
- csr->max_rom = 4;
-
- csr->cache_head->layout_head = csr->root_kv;
- csr->cache_head->layout_tail = csr->root_kv;
-
- csr->root_kv->offset = (CSR1212_CONFIG_ROM_SPACE_BASE & 0xffff) +
- csr->bus_info_len;
-
- csr->root_kv->valid = 0;
- csr->root_kv->next = csr->root_kv;
- csr->root_kv->prev = csr->root_kv;
- ret = csr1212_read_keyval(csr, csr->root_kv);
- if (ret != CSR1212_SUCCESS)
- return ret;
-
- /* Scan through the Root directory finding all extended ROM regions
- * and make cache regions for them */
- for (dentry = csr->root_kv->value.directory.dentries_head;
- dentry; dentry = dentry->next) {
- if (dentry->kv->key.id == CSR1212_KV_ID_EXTENDED_ROM &&
- !dentry->kv->valid) {
- ret = csr1212_read_keyval(csr, dentry->kv);
- if (ret != CSR1212_SUCCESS)
- return ret;
- }
- }
-
- return CSR1212_SUCCESS;
-}