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496 lines
11 KiB
496 lines
11 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* NCI based driver for Samsung S3FWRN5 NFC chip |
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* |
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* Copyright (C) 2015 Samsung Electrnoics |
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* Robert Baldyga <[email protected]> |
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*/ |
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#include <linux/completion.h> |
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#include <linux/firmware.h> |
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#include <crypto/hash.h> |
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#include <crypto/sha1.h> |
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#include "s3fwrn5.h" |
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#include "firmware.h" |
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struct s3fwrn5_fw_version { |
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__u8 major; |
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__u8 build1; |
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__u8 build2; |
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__u8 target; |
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}; |
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static int s3fwrn5_fw_send_msg(struct s3fwrn5_fw_info *fw_info, |
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struct sk_buff *msg, struct sk_buff **rsp) |
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{ |
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struct s3fwrn5_info *info = |
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container_of(fw_info, struct s3fwrn5_info, fw_info); |
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long ret; |
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reinit_completion(&fw_info->completion); |
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ret = s3fwrn5_write(info, msg); |
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if (ret < 0) |
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return ret; |
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ret = wait_for_completion_interruptible_timeout( |
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&fw_info->completion, msecs_to_jiffies(1000)); |
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if (ret < 0) |
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return ret; |
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else if (ret == 0) |
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return -ENXIO; |
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if (!fw_info->rsp) |
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return -EINVAL; |
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*rsp = fw_info->rsp; |
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fw_info->rsp = NULL; |
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return 0; |
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} |
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static int s3fwrn5_fw_prep_msg(struct s3fwrn5_fw_info *fw_info, |
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struct sk_buff **msg, u8 type, u8 code, const void *data, u16 len) |
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{ |
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struct s3fwrn5_fw_header hdr; |
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struct sk_buff *skb; |
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hdr.type = type | fw_info->parity; |
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fw_info->parity ^= 0x80; |
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hdr.code = code; |
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hdr.len = len; |
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skb = alloc_skb(S3FWRN5_FW_HDR_SIZE + len, GFP_KERNEL); |
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if (!skb) |
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return -ENOMEM; |
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skb_put_data(skb, &hdr, S3FWRN5_FW_HDR_SIZE); |
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if (len) |
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skb_put_data(skb, data, len); |
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*msg = skb; |
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return 0; |
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} |
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static int s3fwrn5_fw_get_bootinfo(struct s3fwrn5_fw_info *fw_info, |
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struct s3fwrn5_fw_cmd_get_bootinfo_rsp *bootinfo) |
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{ |
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struct sk_buff *msg, *rsp = NULL; |
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struct s3fwrn5_fw_header *hdr; |
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int ret; |
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/* Send GET_BOOTINFO command */ |
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ret = s3fwrn5_fw_prep_msg(fw_info, &msg, S3FWRN5_FW_MSG_CMD, |
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S3FWRN5_FW_CMD_GET_BOOTINFO, NULL, 0); |
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if (ret < 0) |
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return ret; |
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ret = s3fwrn5_fw_send_msg(fw_info, msg, &rsp); |
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kfree_skb(msg); |
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if (ret < 0) |
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return ret; |
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hdr = (struct s3fwrn5_fw_header *) rsp->data; |
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if (hdr->code != S3FWRN5_FW_RET_SUCCESS) { |
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ret = -EINVAL; |
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goto out; |
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} |
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memcpy(bootinfo, rsp->data + S3FWRN5_FW_HDR_SIZE, 10); |
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out: |
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kfree_skb(rsp); |
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return ret; |
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} |
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static int s3fwrn5_fw_enter_update_mode(struct s3fwrn5_fw_info *fw_info, |
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const void *hash_data, u16 hash_size, |
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const void *sig_data, u16 sig_size) |
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{ |
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struct s3fwrn5_fw_cmd_enter_updatemode args; |
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struct sk_buff *msg, *rsp = NULL; |
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struct s3fwrn5_fw_header *hdr; |
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int ret; |
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/* Send ENTER_UPDATE_MODE command */ |
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args.hashcode_size = hash_size; |
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args.signature_size = sig_size; |
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ret = s3fwrn5_fw_prep_msg(fw_info, &msg, S3FWRN5_FW_MSG_CMD, |
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S3FWRN5_FW_CMD_ENTER_UPDATE_MODE, &args, sizeof(args)); |
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if (ret < 0) |
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return ret; |
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ret = s3fwrn5_fw_send_msg(fw_info, msg, &rsp); |
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kfree_skb(msg); |
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if (ret < 0) |
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return ret; |
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hdr = (struct s3fwrn5_fw_header *) rsp->data; |
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if (hdr->code != S3FWRN5_FW_RET_SUCCESS) { |
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ret = -EPROTO; |
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goto out; |
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} |
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kfree_skb(rsp); |
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/* Send hashcode data */ |
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ret = s3fwrn5_fw_prep_msg(fw_info, &msg, S3FWRN5_FW_MSG_DATA, 0, |
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hash_data, hash_size); |
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if (ret < 0) |
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return ret; |
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ret = s3fwrn5_fw_send_msg(fw_info, msg, &rsp); |
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kfree_skb(msg); |
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if (ret < 0) |
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return ret; |
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hdr = (struct s3fwrn5_fw_header *) rsp->data; |
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if (hdr->code != S3FWRN5_FW_RET_SUCCESS) { |
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ret = -EPROTO; |
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goto out; |
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} |
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kfree_skb(rsp); |
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/* Send signature data */ |
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ret = s3fwrn5_fw_prep_msg(fw_info, &msg, S3FWRN5_FW_MSG_DATA, 0, |
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sig_data, sig_size); |
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if (ret < 0) |
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return ret; |
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ret = s3fwrn5_fw_send_msg(fw_info, msg, &rsp); |
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kfree_skb(msg); |
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if (ret < 0) |
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return ret; |
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hdr = (struct s3fwrn5_fw_header *) rsp->data; |
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if (hdr->code != S3FWRN5_FW_RET_SUCCESS) |
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ret = -EPROTO; |
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out: |
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kfree_skb(rsp); |
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return ret; |
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} |
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static int s3fwrn5_fw_update_sector(struct s3fwrn5_fw_info *fw_info, |
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u32 base_addr, const void *data) |
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{ |
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struct s3fwrn5_fw_cmd_update_sector args; |
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struct sk_buff *msg, *rsp = NULL; |
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struct s3fwrn5_fw_header *hdr; |
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int ret, i; |
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/* Send UPDATE_SECTOR command */ |
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args.base_address = base_addr; |
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ret = s3fwrn5_fw_prep_msg(fw_info, &msg, S3FWRN5_FW_MSG_CMD, |
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S3FWRN5_FW_CMD_UPDATE_SECTOR, &args, sizeof(args)); |
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if (ret < 0) |
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return ret; |
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ret = s3fwrn5_fw_send_msg(fw_info, msg, &rsp); |
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kfree_skb(msg); |
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if (ret < 0) |
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return ret; |
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hdr = (struct s3fwrn5_fw_header *) rsp->data; |
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if (hdr->code != S3FWRN5_FW_RET_SUCCESS) { |
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ret = -EPROTO; |
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goto err; |
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} |
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kfree_skb(rsp); |
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/* Send data split into 256-byte packets */ |
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for (i = 0; i < 16; ++i) { |
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ret = s3fwrn5_fw_prep_msg(fw_info, &msg, |
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S3FWRN5_FW_MSG_DATA, 0, data+256*i, 256); |
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if (ret < 0) |
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break; |
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ret = s3fwrn5_fw_send_msg(fw_info, msg, &rsp); |
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kfree_skb(msg); |
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if (ret < 0) |
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break; |
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hdr = (struct s3fwrn5_fw_header *) rsp->data; |
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if (hdr->code != S3FWRN5_FW_RET_SUCCESS) { |
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ret = -EPROTO; |
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goto err; |
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} |
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kfree_skb(rsp); |
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} |
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return ret; |
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err: |
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kfree_skb(rsp); |
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return ret; |
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} |
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static int s3fwrn5_fw_complete_update_mode(struct s3fwrn5_fw_info *fw_info) |
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{ |
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struct sk_buff *msg, *rsp = NULL; |
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struct s3fwrn5_fw_header *hdr; |
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int ret; |
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/* Send COMPLETE_UPDATE_MODE command */ |
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ret = s3fwrn5_fw_prep_msg(fw_info, &msg, S3FWRN5_FW_MSG_CMD, |
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S3FWRN5_FW_CMD_COMPLETE_UPDATE_MODE, NULL, 0); |
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if (ret < 0) |
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return ret; |
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ret = s3fwrn5_fw_send_msg(fw_info, msg, &rsp); |
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kfree_skb(msg); |
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if (ret < 0) |
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return ret; |
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hdr = (struct s3fwrn5_fw_header *) rsp->data; |
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if (hdr->code != S3FWRN5_FW_RET_SUCCESS) |
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ret = -EPROTO; |
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kfree_skb(rsp); |
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return ret; |
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} |
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/* |
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* Firmware header structure: |
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* |
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* 0x00 - 0x0B : Date and time string (w/o NUL termination) |
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* 0x10 - 0x13 : Firmware version |
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* 0x14 - 0x17 : Signature address |
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* 0x18 - 0x1B : Signature size |
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* 0x1C - 0x1F : Firmware image address |
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* 0x20 - 0x23 : Firmware sectors count |
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* 0x24 - 0x27 : Custom signature address |
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* 0x28 - 0x2B : Custom signature size |
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*/ |
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#define S3FWRN5_FW_IMAGE_HEADER_SIZE 44 |
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int s3fwrn5_fw_request_firmware(struct s3fwrn5_fw_info *fw_info) |
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{ |
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struct s3fwrn5_fw_image *fw = &fw_info->fw; |
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u32 sig_off; |
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u32 image_off; |
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u32 custom_sig_off; |
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int ret; |
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ret = request_firmware(&fw->fw, fw_info->fw_name, |
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&fw_info->ndev->nfc_dev->dev); |
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if (ret < 0) |
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return ret; |
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if (fw->fw->size < S3FWRN5_FW_IMAGE_HEADER_SIZE) { |
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release_firmware(fw->fw); |
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return -EINVAL; |
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} |
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memcpy(fw->date, fw->fw->data + 0x00, 12); |
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fw->date[12] = '\0'; |
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memcpy(&fw->version, fw->fw->data + 0x10, 4); |
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memcpy(&sig_off, fw->fw->data + 0x14, 4); |
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fw->sig = fw->fw->data + sig_off; |
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memcpy(&fw->sig_size, fw->fw->data + 0x18, 4); |
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memcpy(&image_off, fw->fw->data + 0x1C, 4); |
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fw->image = fw->fw->data + image_off; |
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memcpy(&fw->image_sectors, fw->fw->data + 0x20, 4); |
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memcpy(&custom_sig_off, fw->fw->data + 0x24, 4); |
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fw->custom_sig = fw->fw->data + custom_sig_off; |
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memcpy(&fw->custom_sig_size, fw->fw->data + 0x28, 4); |
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return 0; |
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} |
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static void s3fwrn5_fw_release_firmware(struct s3fwrn5_fw_info *fw_info) |
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{ |
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release_firmware(fw_info->fw.fw); |
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} |
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static int s3fwrn5_fw_get_base_addr( |
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struct s3fwrn5_fw_cmd_get_bootinfo_rsp *bootinfo, u32 *base_addr) |
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{ |
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int i; |
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static const struct { |
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u8 version[4]; |
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u32 base_addr; |
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} match[] = { |
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{{0x05, 0x00, 0x00, 0x00}, 0x00005000}, |
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{{0x05, 0x00, 0x00, 0x01}, 0x00003000}, |
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{{0x05, 0x00, 0x00, 0x02}, 0x00003000}, |
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{{0x05, 0x00, 0x00, 0x03}, 0x00003000}, |
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{{0x05, 0x00, 0x00, 0x05}, 0x00003000} |
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}; |
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for (i = 0; i < ARRAY_SIZE(match); ++i) |
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if (bootinfo->hw_version[0] == match[i].version[0] && |
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bootinfo->hw_version[1] == match[i].version[1] && |
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bootinfo->hw_version[3] == match[i].version[3]) { |
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*base_addr = match[i].base_addr; |
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return 0; |
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} |
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return -EINVAL; |
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} |
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static inline bool |
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s3fwrn5_fw_is_custom(const struct s3fwrn5_fw_cmd_get_bootinfo_rsp *bootinfo) |
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{ |
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return !!bootinfo->hw_version[2]; |
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} |
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int s3fwrn5_fw_setup(struct s3fwrn5_fw_info *fw_info) |
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{ |
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struct device *dev = &fw_info->ndev->nfc_dev->dev; |
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struct s3fwrn5_fw_cmd_get_bootinfo_rsp bootinfo; |
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int ret; |
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/* Get bootloader info */ |
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ret = s3fwrn5_fw_get_bootinfo(fw_info, &bootinfo); |
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if (ret < 0) { |
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dev_err(dev, "Failed to get bootinfo, ret=%02x\n", ret); |
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goto err; |
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} |
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/* Match hardware version to obtain firmware base address */ |
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ret = s3fwrn5_fw_get_base_addr(&bootinfo, &fw_info->base_addr); |
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if (ret < 0) { |
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dev_err(dev, "Unknown hardware version\n"); |
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goto err; |
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} |
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fw_info->sector_size = bootinfo.sector_size; |
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fw_info->sig_size = s3fwrn5_fw_is_custom(&bootinfo) ? |
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fw_info->fw.custom_sig_size : fw_info->fw.sig_size; |
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fw_info->sig = s3fwrn5_fw_is_custom(&bootinfo) ? |
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fw_info->fw.custom_sig : fw_info->fw.sig; |
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return 0; |
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err: |
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s3fwrn5_fw_release_firmware(fw_info); |
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return ret; |
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} |
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bool s3fwrn5_fw_check_version(const struct s3fwrn5_fw_info *fw_info, u32 version) |
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{ |
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struct s3fwrn5_fw_version *new = (void *) &fw_info->fw.version; |
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struct s3fwrn5_fw_version *old = (void *) &version; |
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if (new->major > old->major) |
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return true; |
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if (new->build1 > old->build1) |
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return true; |
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if (new->build2 > old->build2) |
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return true; |
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return false; |
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} |
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int s3fwrn5_fw_download(struct s3fwrn5_fw_info *fw_info) |
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{ |
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struct device *dev = &fw_info->ndev->nfc_dev->dev; |
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struct s3fwrn5_fw_image *fw = &fw_info->fw; |
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u8 hash_data[SHA1_DIGEST_SIZE]; |
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struct crypto_shash *tfm; |
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u32 image_size, off; |
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int ret; |
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image_size = fw_info->sector_size * fw->image_sectors; |
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/* Compute SHA of firmware data */ |
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tfm = crypto_alloc_shash("sha1", 0, 0); |
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if (IS_ERR(tfm)) { |
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dev_err(dev, "Cannot allocate shash (code=%pe)\n", tfm); |
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return PTR_ERR(tfm); |
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} |
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ret = crypto_shash_tfm_digest(tfm, fw->image, image_size, hash_data); |
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crypto_free_shash(tfm); |
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if (ret) { |
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dev_err(dev, "Cannot compute hash (code=%d)\n", ret); |
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return ret; |
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} |
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/* Firmware update process */ |
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dev_info(dev, "Firmware update: %s\n", fw_info->fw_name); |
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ret = s3fwrn5_fw_enter_update_mode(fw_info, hash_data, |
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SHA1_DIGEST_SIZE, fw_info->sig, fw_info->sig_size); |
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if (ret < 0) { |
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dev_err(dev, "Unable to enter update mode\n"); |
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return ret; |
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} |
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for (off = 0; off < image_size; off += fw_info->sector_size) { |
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ret = s3fwrn5_fw_update_sector(fw_info, |
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fw_info->base_addr + off, fw->image + off); |
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if (ret < 0) { |
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dev_err(dev, "Firmware update error (code=%d)\n", ret); |
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return ret; |
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} |
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} |
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ret = s3fwrn5_fw_complete_update_mode(fw_info); |
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if (ret < 0) { |
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dev_err(dev, "Unable to complete update mode\n"); |
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return ret; |
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} |
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dev_info(dev, "Firmware update: success\n"); |
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return ret; |
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} |
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void s3fwrn5_fw_init(struct s3fwrn5_fw_info *fw_info, const char *fw_name) |
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{ |
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fw_info->parity = 0x00; |
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fw_info->rsp = NULL; |
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fw_info->fw.fw = NULL; |
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strcpy(fw_info->fw_name, fw_name); |
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init_completion(&fw_info->completion); |
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} |
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void s3fwrn5_fw_cleanup(struct s3fwrn5_fw_info *fw_info) |
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{ |
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s3fwrn5_fw_release_firmware(fw_info); |
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} |
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int s3fwrn5_fw_recv_frame(struct nci_dev *ndev, struct sk_buff *skb) |
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{ |
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struct s3fwrn5_info *info = nci_get_drvdata(ndev); |
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struct s3fwrn5_fw_info *fw_info = &info->fw_info; |
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if (WARN_ON(fw_info->rsp)) { |
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kfree_skb(skb); |
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return -EINVAL; |
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} |
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fw_info->rsp = skb; |
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complete(&fw_info->completion); |
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return 0; |
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}
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