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// SPDX-License-Identifier: BSD-3-Clause-Clear
/*
* Copyright (c) 2022-2023, Qualcomm Innovation Center, Inc. All rights reserved.
*/
#include "core.h"
#include "debug.h"
static int ath11k_fw_request_firmware_api_n(struct ath11k_base *ab,
const char *name)
{
size_t magic_len, len, ie_len;
int ie_id, i, index, bit, ret;
struct ath11k_fw_ie *hdr;
const u8 *data;
__le32 *timestamp;
ab->fw.fw = ath11k_core_firmware_request(ab, name);
if (IS_ERR(ab->fw.fw)) {
ret = PTR_ERR(ab->fw.fw);
ath11k_dbg(ab, ATH11K_DBG_BOOT, "failed to load %s: %d\n", name, ret);
ab->fw.fw = NULL;
return ret;
}
data = ab->fw.fw->data;
len = ab->fw.fw->size;
/* magic also includes the null byte, check that as well */
magic_len = strlen(ATH11K_FIRMWARE_MAGIC) + 1;
if (len < magic_len) {
ath11k_err(ab, "firmware image too small to contain magic: %zu\n",
len);
ret = -EINVAL;
goto err;
}
if (memcmp(data, ATH11K_FIRMWARE_MAGIC, magic_len) != 0) {
ath11k_err(ab, "Invalid firmware magic\n");
ret = -EINVAL;
goto err;
}
/* jump over the padding */
magic_len = ALIGN(magic_len, 4);
/* make sure there's space for padding */
if (magic_len > len) {
ath11k_err(ab, "No space for padding after magic\n");
ret = -EINVAL;
goto err;
}
len -= magic_len;
data += magic_len;
/* loop elements */
while (len > sizeof(struct ath11k_fw_ie)) {
hdr = (struct ath11k_fw_ie *)data;
ie_id = le32_to_cpu(hdr->id);
ie_len = le32_to_cpu(hdr->len);
len -= sizeof(*hdr);
data += sizeof(*hdr);
if (len < ie_len) {
ath11k_err(ab, "Invalid length for FW IE %d (%zu < %zu)\n",
ie_id, len, ie_len);
ret = -EINVAL;
goto err;
}
switch (ie_id) {
case ATH11K_FW_IE_TIMESTAMP:
if (ie_len != sizeof(u32))
break;
timestamp = (__le32 *)data;
ath11k_dbg(ab, ATH11K_DBG_BOOT, "found fw timestamp %d\n",
le32_to_cpup(timestamp));
break;
case ATH11K_FW_IE_FEATURES:
ath11k_dbg(ab, ATH11K_DBG_BOOT,
"found firmware features ie (%zd B)\n",
ie_len);
for (i = 0; i < ATH11K_FW_FEATURE_COUNT; i++) {
index = i / 8;
bit = i % 8;
if (index == ie_len)
break;
if (data[index] & (1 << bit))
__set_bit(i, ab->fw.fw_features);
}
ath11k_dbg_dump(ab, ATH11K_DBG_BOOT, "features", "",
ab->fw.fw_features,
sizeof(ab->fw.fw_features));
break;
case ATH11K_FW_IE_AMSS_IMAGE:
ath11k_dbg(ab, ATH11K_DBG_BOOT,
"found fw image ie (%zd B)\n",
ie_len);
ab->fw.amss_data = data;
ab->fw.amss_len = ie_len;
break;
case ATH11K_FW_IE_M3_IMAGE:
ath11k_dbg(ab, ATH11K_DBG_BOOT,
"found m3 image ie (%zd B)\n",
ie_len);
ab->fw.m3_data = data;
ab->fw.m3_len = ie_len;
break;
default:
ath11k_warn(ab, "Unknown FW IE: %u\n", ie_id);
break;
}
/* jump over the padding */
ie_len = ALIGN(ie_len, 4);
/* make sure there's space for padding */
if (ie_len > len)
break;
len -= ie_len;
data += ie_len;
}
return 0;
err:
release_firmware(ab->fw.fw);
ab->fw.fw = NULL;
return ret;
}
int ath11k_fw_pre_init(struct ath11k_base *ab)
{
int ret;
ret = ath11k_fw_request_firmware_api_n(ab, ATH11K_FW_API2_FILE);
if (ret == 0) {
ab->fw.api_version = 2;
goto out;
}
ab->fw.api_version = 1;
out:
ath11k_dbg(ab, ATH11K_DBG_BOOT, "using fw api %d\n",
ab->fw.api_version);
return 0;
}
void ath11k_fw_destroy(struct ath11k_base *ab)
{
release_firmware(ab->fw.fw);
}
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