diff options
Diffstat (limited to 'drivers/net/wireless/ath/ath12k/fw.c')
| -rw-r--r-- | drivers/net/wireless/ath/ath12k/fw.c | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath12k/fw.c b/drivers/net/wireless/ath/ath12k/fw.c new file mode 100644 index 0000000000..5be4b2d4a1 --- /dev/null +++ b/drivers/net/wireless/ath/ath12k/fw.c @@ -0,0 +1,171 @@ +// SPDX-License-Identifier: BSD-3-Clause-Clear +/* + * Copyright (c) 2022-2024 Qualcomm Innovation Center, Inc. All rights reserved. + */ + +#include "core.h" + +#include "debug.h" + +static int ath12k_fw_request_firmware_api_n(struct ath12k_base *ab, + const char *name) +{ + size_t magic_len, len, ie_len; + int ie_id, i, index, bit, ret; + struct ath12k_fw_ie *hdr; + const u8 *data; + __le32 *timestamp; + + ab->fw.fw = ath12k_core_firmware_request(ab, name); + if (IS_ERR(ab->fw.fw)) { + ret = PTR_ERR(ab->fw.fw); + ath12k_dbg(ab, ATH12K_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(ATH12K_FIRMWARE_MAGIC) + 1; + + if (len < magic_len) { + ath12k_err(ab, "firmware image too small to contain magic: %zu\n", + len); + ret = -EINVAL; + goto err; + } + + if (memcmp(data, ATH12K_FIRMWARE_MAGIC, magic_len) != 0) { + ath12k_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) { + ath12k_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 ath12k_fw_ie)) { + hdr = (struct ath12k_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) { + ath12k_err(ab, "Invalid length for FW IE %d (%zu < %zu)\n", + ie_id, len, ie_len); + ret = -EINVAL; + goto err; + } + + switch (ie_id) { + case ATH12K_FW_IE_TIMESTAMP: + if (ie_len != sizeof(u32)) + break; + + timestamp = (__le32 *)data; + + ath12k_dbg(ab, ATH12K_DBG_BOOT, "found fw timestamp %d\n", + le32_to_cpup(timestamp)); + break; + case ATH12K_FW_IE_FEATURES: + ath12k_dbg(ab, ATH12K_DBG_BOOT, + "found firmware features ie (%zd B)\n", + ie_len); + + for (i = 0; i < ATH12K_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); + } + + ath12k_dbg_dump(ab, ATH12K_DBG_BOOT, "features", "", + ab->fw.fw_features, + sizeof(ab->fw.fw_features)); + break; + case ATH12K_FW_IE_AMSS_IMAGE: + ath12k_dbg(ab, ATH12K_DBG_BOOT, + "found fw image ie (%zd B)\n", + ie_len); + + ab->fw.amss_data = data; + ab->fw.amss_len = ie_len; + break; + case ATH12K_FW_IE_M3_IMAGE: + ath12k_dbg(ab, ATH12K_DBG_BOOT, + "found m3 image ie (%zd B)\n", + ie_len); + + ab->fw.m3_data = data; + ab->fw.m3_len = ie_len; + break; + case ATH12K_FW_IE_AMSS_DUALMAC_IMAGE: + ath12k_dbg(ab, ATH12K_DBG_BOOT, + "found dualmac fw image ie (%zd B)\n", + ie_len); + ab->fw.amss_dualmac_data = data; + ab->fw.amss_dualmac_len = ie_len; + break; + default: + ath12k_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; +} + +void ath12k_fw_map(struct ath12k_base *ab) +{ + int ret; + + ret = ath12k_fw_request_firmware_api_n(ab, ATH12K_FW_API2_FILE); + if (ret == 0) + ab->fw.api_version = 2; + else + ab->fw.api_version = 1; + + ath12k_dbg(ab, ATH12K_DBG_BOOT, "using fw api %d\n", + ab->fw.api_version); +} + +void ath12k_fw_unmap(struct ath12k_base *ab) +{ + release_firmware(ab->fw.fw); + memset(&ab->fw, 0, sizeof(ab->fw)); +} |