linux/drivers/nfc/s3fwrn5/nci.c
Thomas Gleixner 9dd0abd232 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 123
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 or later 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-or-later

has been chosen to replace the boilerplate/reference in 7 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Richard Fontana <rfontana@redhat.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190523091651.504392586@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-24 17:39:03 +02:00

155 lines
3.5 KiB
C

// 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 "s3fwrn5.h"
#include "nci.h"
static int s3fwrn5_nci_prop_rsp(struct nci_dev *ndev, struct sk_buff *skb)
{
__u8 status = skb->data[0];
nci_req_complete(ndev, status);
return 0;
}
static struct nci_driver_ops s3fwrn5_nci_prop_ops[] = {
{
.opcode = nci_opcode_pack(NCI_GID_PROPRIETARY,
NCI_PROP_AGAIN),
.rsp = s3fwrn5_nci_prop_rsp,
},
{
.opcode = nci_opcode_pack(NCI_GID_PROPRIETARY,
NCI_PROP_GET_RFREG),
.rsp = s3fwrn5_nci_prop_rsp,
},
{
.opcode = nci_opcode_pack(NCI_GID_PROPRIETARY,
NCI_PROP_SET_RFREG),
.rsp = s3fwrn5_nci_prop_rsp,
},
{
.opcode = nci_opcode_pack(NCI_GID_PROPRIETARY,
NCI_PROP_GET_RFREG_VER),
.rsp = s3fwrn5_nci_prop_rsp,
},
{
.opcode = nci_opcode_pack(NCI_GID_PROPRIETARY,
NCI_PROP_SET_RFREG_VER),
.rsp = s3fwrn5_nci_prop_rsp,
},
{
.opcode = nci_opcode_pack(NCI_GID_PROPRIETARY,
NCI_PROP_START_RFREG),
.rsp = s3fwrn5_nci_prop_rsp,
},
{
.opcode = nci_opcode_pack(NCI_GID_PROPRIETARY,
NCI_PROP_STOP_RFREG),
.rsp = s3fwrn5_nci_prop_rsp,
},
{
.opcode = nci_opcode_pack(NCI_GID_PROPRIETARY,
NCI_PROP_FW_CFG),
.rsp = s3fwrn5_nci_prop_rsp,
},
{
.opcode = nci_opcode_pack(NCI_GID_PROPRIETARY,
NCI_PROP_WR_RESET),
.rsp = s3fwrn5_nci_prop_rsp,
},
};
void s3fwrn5_nci_get_prop_ops(struct nci_driver_ops **ops, size_t *n)
{
*ops = s3fwrn5_nci_prop_ops;
*n = ARRAY_SIZE(s3fwrn5_nci_prop_ops);
}
#define S3FWRN5_RFREG_SECTION_SIZE 252
int s3fwrn5_nci_rf_configure(struct s3fwrn5_info *info, const char *fw_name)
{
const struct firmware *fw;
struct nci_prop_fw_cfg_cmd fw_cfg;
struct nci_prop_set_rfreg_cmd set_rfreg;
struct nci_prop_stop_rfreg_cmd stop_rfreg;
u32 checksum;
int i, len;
int ret;
ret = request_firmware(&fw, fw_name, &info->ndev->nfc_dev->dev);
if (ret < 0)
return ret;
/* Compute rfreg checksum */
checksum = 0;
for (i = 0; i < fw->size; i += 4)
checksum += *((u32 *)(fw->data+i));
/* Set default clock configuration for external crystal */
fw_cfg.clk_type = 0x01;
fw_cfg.clk_speed = 0xff;
fw_cfg.clk_req = 0xff;
ret = nci_prop_cmd(info->ndev, NCI_PROP_FW_CFG,
sizeof(fw_cfg), (__u8 *)&fw_cfg);
if (ret < 0)
goto out;
/* Start rfreg configuration */
dev_info(&info->ndev->nfc_dev->dev,
"rfreg configuration update: %s\n", fw_name);
ret = nci_prop_cmd(info->ndev, NCI_PROP_START_RFREG, 0, NULL);
if (ret < 0) {
dev_err(&info->ndev->nfc_dev->dev,
"Unable to start rfreg update\n");
goto out;
}
/* Update rfreg */
set_rfreg.index = 0;
for (i = 0; i < fw->size; i += S3FWRN5_RFREG_SECTION_SIZE) {
len = (fw->size - i < S3FWRN5_RFREG_SECTION_SIZE) ?
(fw->size - i) : S3FWRN5_RFREG_SECTION_SIZE;
memcpy(set_rfreg.data, fw->data+i, len);
ret = nci_prop_cmd(info->ndev, NCI_PROP_SET_RFREG,
len+1, (__u8 *)&set_rfreg);
if (ret < 0) {
dev_err(&info->ndev->nfc_dev->dev,
"rfreg update error (code=%d)\n", ret);
goto out;
}
set_rfreg.index++;
}
/* Finish rfreg configuration */
stop_rfreg.checksum = checksum & 0xffff;
ret = nci_prop_cmd(info->ndev, NCI_PROP_STOP_RFREG,
sizeof(stop_rfreg), (__u8 *)&stop_rfreg);
if (ret < 0) {
dev_err(&info->ndev->nfc_dev->dev,
"Unable to stop rfreg update\n");
goto out;
}
dev_info(&info->ndev->nfc_dev->dev,
"rfreg configuration update: success\n");
out:
release_firmware(fw);
return ret;
}