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|
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* NCI based driver for Samsung S3FWRN5 NFC chip
*
* Copyright (C) 2015 Samsung Electrnoics
* Robert Baldyga <r.baldyga@samsung.com>
*/
#include <linux/completion.h>
#include <linux/firmware.h>
#include <crypto/hash.h>
#include <crypto/sha.h>
#include "s3fwrn5.h"
#include "firmware.h"
struct s3fwrn5_fw_version {
__u8 major;
__u8 build1;
__u8 build2;
__u8 target;
};
static int s3fwrn5_fw_send_msg(struct s3fwrn5_fw_info *fw_info,
struct sk_buff *msg, struct sk_buff **rsp)
{
struct s3fwrn5_info *info =
container_of(fw_info, struct s3fwrn5_info, fw_info);
long ret;
reinit_completion(&fw_info->completion);
ret = s3fwrn5_write(info, msg);
if (ret < 0)
return ret;
ret = wait_for_completion_interruptible_timeout(
&fw_info->completion, msecs_to_jiffies(1000));
if (ret < 0)
return ret;
else if (ret == 0)
return -ENXIO;
if (!fw_info->rsp)
return -EINVAL;
*rsp = fw_info->rsp;
fw_info->rsp = NULL;
return 0;
}
static int s3fwrn5_fw_prep_msg(struct s3fwrn5_fw_info *fw_info,
struct sk_buff **msg, u8 type, u8 code, const void *data, u16 len)
{
struct s3fwrn5_fw_header hdr;
struct sk_buff *skb;
hdr.type = type | fw_info->parity;
fw_info->parity ^= 0x80;
hdr.code = code;
hdr.len = len;
skb = alloc_skb(S3FWRN5_FW_HDR_SIZE + len, GFP_KERNEL);
if (!skb)
return -ENOMEM;
skb_put_data(skb, &hdr, S3FWRN5_FW_HDR_SIZE);
if (len)
skb_put_data(skb, data, len);
*msg = skb;
return 0;
}
static int s3fwrn5_fw_get_bootinfo(struct s3fwrn5_fw_info *fw_info,
struct s3fwrn5_fw_cmd_get_bootinfo_rsp *bootinfo)
{
struct sk_buff *msg, *rsp = NULL;
struct s3fwrn5_fw_header *hdr;
int ret;
/* Send GET_BOOTINFO command */
ret = s3fwrn5_fw_prep_msg(fw_info, &msg, S3FWRN5_FW_MSG_CMD,
S3FWRN5_FW_CMD_GET_BOOTINFO, NULL, 0);
if (ret < 0)
return ret;
ret = s3fwrn5_fw_send_msg(fw_info, msg, &rsp);
kfree_skb(msg);
if (ret < 0)
return ret;
hdr = (struct s3fwrn5_fw_header *) rsp->data;
if (hdr->code != S3FWRN5_FW_RET_SUCCESS) {
ret = -EINVAL;
goto out;
}
memcpy(bootinfo, rsp->data + S3FWRN5_FW_HDR_SIZE, 10);
out:
kfree_skb(rsp);
return ret;
}
static int s3fwrn5_fw_enter_update_mode(struct s3fwrn5_fw_info *fw_info,
const void *hash_data, u16 hash_size,
const void *sig_data, u16 sig_size)
{
struct s3fwrn5_fw_cmd_enter_updatemode args;
struct sk_buff *msg, *rsp = NULL;
struct s3fwrn5_fw_header *hdr;
int ret;
/* Send ENTER_UPDATE_MODE command */
args.hashcode_size = hash_size;
args.signature_size = sig_size;
ret = s3fwrn5_fw_prep_msg(fw_info, &msg, S3FWRN5_FW_MSG_CMD,
S3FWRN5_FW_CMD_ENTER_UPDATE_MODE, &args, sizeof(args));
if (ret < 0)
return ret;
ret = s3fwrn5_fw_send_msg(fw_info, msg, &rsp);
kfree_skb(msg);
if (ret < 0)
return ret;
hdr = (struct s3fwrn5_fw_header *) rsp->data;
if (hdr->code != S3FWRN5_FW_RET_SUCCESS) {
ret = -EPROTO;
goto out;
}
kfree_skb(rsp);
/* Send hashcode data */
ret = s3fwrn5_fw_prep_msg(fw_info, &msg, S3FWRN5_FW_MSG_DATA, 0,
hash_data, hash_size);
if (ret < 0)
return ret;
ret = s3fwrn5_fw_send_msg(fw_info, msg, &rsp);
kfree_skb(msg);
if (ret < 0)
return ret;
hdr = (struct s3fwrn5_fw_header *) rsp->data;
if (hdr->code != S3FWRN5_FW_RET_SUCCESS) {
ret = -EPROTO;
goto out;
}
kfree_skb(rsp);
/* Send signature data */
ret = s3fwrn5_fw_prep_msg(fw_info, &msg, S3FWRN5_FW_MSG_DATA, 0,
sig_data, sig_size);
if (ret < 0)
return ret;
ret = s3fwrn5_fw_send_msg(fw_info, msg, &rsp);
kfree_skb(msg);
if (ret < 0)
return ret;
hdr = (struct s3fwrn5_fw_header *) rsp->data;
if (hdr->code != S3FWRN5_FW_RET_SUCCESS)
ret = -EPROTO;
out:
kfree_skb(rsp);
return ret;
}
static int s3fwrn5_fw_update_sector(struct s3fwrn5_fw_info *fw_info,
u32 base_addr, const void *data)
{
struct s3fwrn5_fw_cmd_update_sector args;
struct sk_buff *msg, *rsp = NULL;
struct s3fwrn5_fw_header *hdr;
int ret, i;
/* Send UPDATE_SECTOR command */
args.base_address = base_addr;
ret = s3fwrn5_fw_prep_msg(fw_info, &msg, S3FWRN5_FW_MSG_CMD,
S3FWRN5_FW_CMD_UPDATE_SECTOR, &args, sizeof(args));
if (ret < 0)
return ret;
ret = s3fwrn5_fw_send_msg(fw_info, msg, &rsp);
kfree_skb(msg);
if (ret < 0)
return ret;
hdr = (struct s3fwrn5_fw_header *) rsp->data;
if (hdr->code != S3FWRN5_FW_RET_SUCCESS) {
ret = -EPROTO;
goto err;
}
kfree_skb(rsp);
/* Send data split into 256-byte packets */
for (i = 0; i < 16; ++i) {
ret = s3fwrn5_fw_prep_msg(fw_info, &msg,
S3FWRN5_FW_MSG_DATA, 0, data+256*i, 256);
if (ret < 0)
break;
ret = s3fwrn5_fw_send_msg(fw_info, msg, &rsp);
kfree_skb(msg);
if (ret < 0)
break;
hdr = (struct s3fwrn5_fw_header *) rsp->data;
if (hdr->code != S3FWRN5_FW_RET_SUCCESS) {
ret = -EPROTO;
goto err;
}
kfree_skb(rsp);
}
return ret;
err:
kfree_skb(rsp);
return ret;
}
static int s3fwrn5_fw_complete_update_mode(struct s3fwrn5_fw_info *fw_info
|