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linux_dsm_epyc7002/drivers/nfc/nxp-nci/firmware.c
Thomas Gleixner 46fe777164 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 399 
Based on 1 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms and conditions of the gnu general public license
  version 2 as published by the free software foundation this program
  is distributed in the hope that it will be useful but without any
  warranty without even the implied warranty of merchantability or
  fitness for a particular purpose see the gnu general public license
  for more details you should have received a copy of the gnu general
  public license along with this program if not see http www gnu org
  licenses

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 33 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190531081038.745679586@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:37:12 +02:00

313 lines
7.6 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Generic driver for NXP NCI NFC chips
*
* Copyright (C) 2014 NXP Semiconductors All rights reserved.
*
* Author: Clément Perrochaud <clement.perrochaud@nxp.com>
*
* Derived from PN544 device driver:
* Copyright (C) 2012 Intel Corporation. All rights reserved.
*/
#include <linux/completion.h>
#include <linux/firmware.h>
#include <linux/nfc.h>
#include <asm/unaligned.h>
#include "nxp-nci.h"
/* Crypto operations can take up to 30 seconds */
#define NXP_NCI_FW_ANSWER_TIMEOUT msecs_to_jiffies(30000)
#define NXP_NCI_FW_CMD_RESET 0xF0
#define NXP_NCI_FW_CMD_GETVERSION 0xF1
#define NXP_NCI_FW_CMD_CHECKINTEGRITY 0xE0
#define NXP_NCI_FW_CMD_WRITE 0xC0
#define NXP_NCI_FW_CMD_READ 0xA2
#define NXP_NCI_FW_CMD_GETSESSIONSTATE 0xF2
#define NXP_NCI_FW_CMD_LOG 0xA7
#define NXP_NCI_FW_CMD_FORCE 0xD0
#define NXP_NCI_FW_CMD_GET_DIE_ID 0xF4
#define NXP_NCI_FW_CHUNK_FLAG 0x0400
#define NXP_NCI_FW_RESULT_OK 0x00
#define NXP_NCI_FW_RESULT_INVALID_ADDR 0x01
#define NXP_NCI_FW_RESULT_GENERIC_ERROR 0x02
#define NXP_NCI_FW_RESULT_UNKNOWN_CMD 0x0B
#define NXP_NCI_FW_RESULT_ABORTED_CMD 0x0C
#define NXP_NCI_FW_RESULT_PLL_ERROR 0x0D
#define NXP_NCI_FW_RESULT_ADDR_RANGE_OFL_ERROR 0x1E
#define NXP_NCI_FW_RESULT_BUFFER_OFL_ERROR 0x1F
#define NXP_NCI_FW_RESULT_MEM_BSY 0x20
#define NXP_NCI_FW_RESULT_SIGNATURE_ERROR 0x21
#define NXP_NCI_FW_RESULT_FIRMWARE_VERSION_ERROR 0x24
#define NXP_NCI_FW_RESULT_PROTOCOL_ERROR 0x28
#define NXP_NCI_FW_RESULT_SFWU_DEGRADED 0x2A
#define NXP_NCI_FW_RESULT_PH_STATUS_FIRST_CHUNK 0x2D
#define NXP_NCI_FW_RESULT_PH_STATUS_NEXT_CHUNK 0x2E
#define NXP_NCI_FW_RESULT_PH_STATUS_INTERNAL_ERROR_5 0xC5
void nxp_nci_fw_work_complete(struct nxp_nci_info *info, int result)
{
struct nxp_nci_fw_info *fw_info = &info->fw_info;
int r;
if (info->phy_ops->set_mode) {
r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
if (r < 0 && result == 0)
result = -r;
}
info->mode = NXP_NCI_MODE_COLD;
if (fw_info->fw) {
release_firmware(fw_info->fw);
fw_info->fw = NULL;
}
nfc_fw_download_done(info->ndev->nfc_dev, fw_info->name, (u32) -result);
}
/* crc_ccitt cannot be used since it is computed MSB first and not LSB first */
static u16 nxp_nci_fw_crc(u8 const *buffer, size_t len)
{
u16 crc = 0xffff;
while (len--) {
crc = ((crc >> 8) | (crc << 8)) ^ *buffer++;
crc ^= (crc & 0xff) >> 4;
crc ^= (crc & 0xff) << 12;
crc ^= (crc & 0xff) << 5;
}
return crc;
}
static int nxp_nci_fw_send_chunk(struct nxp_nci_info *info)
{
struct nxp_nci_fw_info *fw_info = &info->fw_info;
u16 header, crc;
struct sk_buff *skb;
size_t chunk_len;
size_t remaining_len;
int r;
skb = nci_skb_alloc(info->ndev, info->max_payload, GFP_KERNEL);
if (!skb) {
r = -ENOMEM;
goto chunk_exit;
}
chunk_len = info->max_payload - NXP_NCI_FW_HDR_LEN - NXP_NCI_FW_CRC_LEN;
remaining_len = fw_info->frame_size - fw_info->written;
if (remaining_len > chunk_len) {
header = NXP_NCI_FW_CHUNK_FLAG;
} else {
chunk_len = remaining_len;
header = 0x0000;
}
header |= chunk_len & NXP_NCI_FW_FRAME_LEN_MASK;
put_unaligned_be16(header, skb_put(skb, NXP_NCI_FW_HDR_LEN));
skb_put_data(skb, fw_info->data + fw_info->written, chunk_len);
crc = nxp_nci_fw_crc(skb->data, chunk_len + NXP_NCI_FW_HDR_LEN);
put_unaligned_be16(crc, skb_put(skb, NXP_NCI_FW_CRC_LEN));
r = info->phy_ops->write(info->phy_id, skb);
if (r >= 0)
r = chunk_len;
kfree_skb(skb);
chunk_exit:
return r;
}
static int nxp_nci_fw_send(struct nxp_nci_info *info)
{
struct nxp_nci_fw_info *fw_info = &info->fw_info;
long completion_rc;
int r;
reinit_completion(&fw_info->cmd_completion);
if (fw_info->written == 0) {
fw_info->frame_size = get_unaligned_be16(fw_info->data) &
NXP_NCI_FW_FRAME_LEN_MASK;
fw_info->data += NXP_NCI_FW_HDR_LEN;
fw_info->size -= NXP_NCI_FW_HDR_LEN;
}
if (fw_info->frame_size > fw_info->size)
return -EMSGSIZE;
r = nxp_nci_fw_send_chunk(info);
if (r < 0)
return r;
fw_info->written += r;
if (*fw_info->data == NXP_NCI_FW_CMD_RESET) {
fw_info->cmd_result = 0;
if (fw_info->fw)
schedule_work(&fw_info->work);
} else {
completion_rc = wait_for_completion_interruptible_timeout(
&fw_info->cmd_completion, NXP_NCI_FW_ANSWER_TIMEOUT);
if (completion_rc == 0)
return -ETIMEDOUT;
}
return 0;
}
void nxp_nci_fw_work(struct work_struct *work)
{
struct nxp_nci_info *info;
struct nxp_nci_fw_info *fw_info;
int r;
fw_info = container_of(work, struct nxp_nci_fw_info, work);
info = container_of(fw_info, struct nxp_nci_info, fw_info);
mutex_lock(&info->info_lock);
r = fw_info->cmd_result;
if (r < 0)
goto exit_work;
if (fw_info->written == fw_info->frame_size) {
fw_info->data += fw_info->frame_size;
fw_info->size -= fw_info->frame_size;
fw_info->written = 0;
}
if (fw_info->size > 0)
r = nxp_nci_fw_send(info);
exit_work:
if (r < 0 || fw_info->size == 0)
nxp_nci_fw_work_complete(info, r);
mutex_unlock(&info->info_lock);
}
int nxp_nci_fw_download(struct nci_dev *ndev, const char *firmware_name)
{
struct nxp_nci_info *info = nci_get_drvdata(ndev);
struct nxp_nci_fw_info *fw_info = &info->fw_info;
int r;
mutex_lock(&info->info_lock);
if (!info->phy_ops->set_mode || !info->phy_ops->write) {
r = -ENOTSUPP;
goto fw_download_exit;
}
if (!firmware_name || firmware_name[0] == '\0') {
r = -EINVAL;
goto fw_download_exit;
}
strcpy(fw_info->name, firmware_name);
r = request_firmware(&fw_info->fw, firmware_name,
ndev->nfc_dev->dev.parent);
if (r < 0)
goto fw_download_exit;
r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_FW);
if (r < 0) {
release_firmware(fw_info->fw);
goto fw_download_exit;
}
info->mode = NXP_NCI_MODE_FW;
fw_info->data = fw_info->fw->data;
fw_info->size = fw_info->fw->size;
fw_info->written = 0;
fw_info->frame_size = 0;
fw_info->cmd_result = 0;
schedule_work(&fw_info->work);
fw_download_exit:
mutex_unlock(&info->info_lock);
return r;
}
static int nxp_nci_fw_read_status(u8 stat)
{
switch (stat) {
case NXP_NCI_FW_RESULT_OK:
return 0;
case NXP_NCI_FW_RESULT_INVALID_ADDR:
return -EINVAL;
case NXP_NCI_FW_RESULT_UNKNOWN_CMD:
return -EINVAL;
case NXP_NCI_FW_RESULT_ABORTED_CMD:
return -EMSGSIZE;
case NXP_NCI_FW_RESULT_ADDR_RANGE_OFL_ERROR:
return -EADDRNOTAVAIL;
case NXP_NCI_FW_RESULT_BUFFER_OFL_ERROR:
return -ENOBUFS;
case NXP_NCI_FW_RESULT_MEM_BSY:
return -ENOKEY;
case NXP_NCI_FW_RESULT_SIGNATURE_ERROR:
return -EKEYREJECTED;
case NXP_NCI_FW_RESULT_FIRMWARE_VERSION_ERROR:
return -EALREADY;
case NXP_NCI_FW_RESULT_PROTOCOL_ERROR:
return -EPROTO;
case NXP_NCI_FW_RESULT_SFWU_DEGRADED:
return -EHWPOISON;
case NXP_NCI_FW_RESULT_PH_STATUS_FIRST_CHUNK:
return 0;
case NXP_NCI_FW_RESULT_PH_STATUS_NEXT_CHUNK:
return 0;
case NXP_NCI_FW_RESULT_PH_STATUS_INTERNAL_ERROR_5:
return -EINVAL;
default:
return -EIO;
}
}
static u16 nxp_nci_fw_check_crc(struct sk_buff *skb)
{
u16 crc, frame_crc;
size_t len = skb->len - NXP_NCI_FW_CRC_LEN;
crc = nxp_nci_fw_crc(skb->data, len);
frame_crc = get_unaligned_be16(skb->data + len);
return (crc ^ frame_crc);
}
void nxp_nci_fw_recv_frame(struct nci_dev *ndev, struct sk_buff *skb)
{
struct nxp_nci_info *info = nci_get_drvdata(ndev);
struct nxp_nci_fw_info *fw_info = &info->fw_info;
complete(&fw_info->cmd_completion);
if (skb) {
if (nxp_nci_fw_check_crc(skb) != 0x00)
fw_info->cmd_result = -EBADMSG;
else
fw_info->cmd_result = nxp_nci_fw_read_status(*(u8 *)skb_pull(skb, NXP_NCI_FW_HDR_LEN));
kfree_skb(skb);
} else {
fw_info->cmd_result = -EIO;
}
if (fw_info->fw)
schedule_work(&fw_info->work);
}
EXPORT_SYMBOL(nxp_nci_fw_recv_frame);
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