nagai/kernel
3
0
Fork 0
forked from mirrors/linux
Code Pull requests Activity

nfc: s3fwrn5: Add driver for Samsung S3FWRN5 NFC Chip

Browse source 
Add driver for Samsung S3FWRN5 NFC controller.
S3FWRN5 is using NCI protocol and I2C communication interface.

Signed-off-by: Robert Baldyga <r.baldyga@samsung.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Robert Baldyga 2015-08-20 17:26:02 +02:00 committed by Samuel Ortiz
parent 025a0cb838
commit c04c674fad
13 changed files with 1565 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

27
Documentation/devicetree/bindings/net/nfc/s3fwrn5.txt Normal file
View file

@ -0,0 +1,27 @@
* Samsung S3FWRN5 NCI NFC Controller
Required properties:
- compatible: Should be "samsung,s3fwrn5-i2c".
- reg: address on the bus
- interrupt-parent: phandle for the interrupt gpio controller
- interrupts: GPIO interrupt to which the chip is connected
- s3fwrn5,en-gpios: Output GPIO pin used for enabling/disabling the chip
- s3fwrn5,fw-gpios: Output GPIO pin used to enter firmware mode and
sleep/wakeup control
Example:
&hsi2c_4 {
status = "okay";
s3fwrn5@27 {
compatible = "samsung,s3fwrn5-i2c";
reg = <0x27>;
interrupt-parent = <&gpa1>;
interrupts = <3 0 0>;
s3fwrn5,en-gpios = <&gpf1 4 0>;
s3fwrn5,fw-gpios = <&gpj0 2 0>;
};
};

6
MAINTAINERS
View file

@ -8871,6 +8871,12 @@ L: linux-media@vger.kernel.org
S: Supported
F: drivers/media/i2c/s5k5baf.c
SAMSUNG S3FWRN5 NFC DRIVER
M: Robert Baldyga <r.baldyga@samsung.com>
L: linux-nfc@lists.01.org (moderated for non-subscribers)
S: Supported
F: drivers/nfc/s3fwrn5
SAMSUNG SOC CLOCK DRIVERS
M: Sylwester Nawrocki <s.nawrocki@samsung.com>
M: Tomasz Figa <tomasz.figa@gmail.com>

1
drivers/nfc/Kconfig
View file

@ -74,4 +74,5 @@ source "drivers/nfc/nfcmrvl/Kconfig"
source "drivers/nfc/st21nfca/Kconfig"
source "drivers/nfc/st-nci/Kconfig"
source "drivers/nfc/nxp-nci/Kconfig"
source "drivers/nfc/s3fwrn5/Kconfig"
endmenu

1
drivers/nfc/Makefile
View file

@ -14,3 +14,4 @@ obj-$(CONFIG_NFC_TRF7970A) += trf7970a.o
obj-$(CONFIG_NFC_ST21NFCA) += st21nfca/
obj-$(CONFIG_NFC_ST_NCI) += st-nci/
obj-$(CONFIG_NFC_NXP_NCI) += nxp-nci/
obj-$(CONFIG_NFC_S3FWRN5) += s3fwrn5/

19
drivers/nfc/s3fwrn5/Kconfig Normal file
View file

@ -0,0 +1,19 @@
config NFC_S3FWRN5
tristate
---help---
Core driver for Samsung S3FWRN5 NFC chip. Contains core utilities
of chip. It's intended to be used by PHYs to avoid duplicating lots
of common code.
config NFC_S3FWRN5_I2C
tristate "Samsung S3FWRN5 I2C support"
depends on NFC_NCI && I2C
select NFC_S3FWRN5
default n
---help---
This module adds support for an I2C interface to the S3FWRN5 chip.
Select this if your platform is using the I2C bus.
To compile this driver as a module, choose m here. The module will
be called s3fwrn5_i2c.ko.
Say N if unsure.

11
drivers/nfc/s3fwrn5/Makefile Normal file
View file

@ -0,0 +1,11 @@
#
# Makefile for Samsung S3FWRN5 NFC driver
#
s3fwrn5-objs = core.o firmware.o nci.o
s3fwrn5_i2c-objs = i2c.o
obj-$(CONFIG_NFC_S3FWRN5) += s3fwrn5.o
obj-$(CONFIG_NFC_S3FWRN5_I2C) += s3fwrn5_i2c.o
ccflags-$(CONFIG_NFC_DEBUG) := -DDEBUG

219
drivers/nfc/s3fwrn5/core.c Normal file
View file

@ -0,0 +1,219 @@
/*
* NCI based driver for Samsung S3FWRN5 NFC chip
*
* Copyright (C) 2015 Samsung Electrnoics
* Robert Baldyga <r.baldyga@samsung.com>
*
* 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/>.
*/
#include <linux/module.h>
#include <net/nfc/nci_core.h>
#include "s3fwrn5.h"
#include "firmware.h"
#include "nci.h"
#define S3FWRN5_NFC_PROTOCOLS (NFC_PROTO_JEWEL_MASK | \
NFC_PROTO_MIFARE_MASK | \
NFC_PROTO_FELICA_MASK | \
NFC_PROTO_ISO14443_MASK | \
NFC_PROTO_ISO14443_B_MASK | \
NFC_PROTO_ISO15693_MASK)
static int s3fwrn5_firmware_update(struct s3fwrn5_info *info)
{
bool need_update;
int ret;
s3fwrn5_fw_init(&info->fw_info, "sec_s3fwrn5_firmware.bin");
/* Update firmware */
s3fwrn5_set_wake(info, false);
s3fwrn5_set_mode(info, S3FWRN5_MODE_FW);
ret = s3fwrn5_fw_setup(&info->fw_info);
if (ret < 0)
return ret;
need_update = s3fwrn5_fw_check_version(&info->fw_info,
info->ndev->manufact_specific_info);
if (!need_update)
goto out;
dev_info(&info->ndev->nfc_dev->dev, "Detected new firmware version\n");
ret = s3fwrn5_fw_download(&info->fw_info);
if (ret < 0)
goto out;
/* Update RF configuration */
s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI);
s3fwrn5_set_wake(info, true);
ret = s3fwrn5_nci_rf_configure(info, "sec_s3fwrn5_rfreg.bin");
s3fwrn5_set_wake(info, false);
out:
s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD);
s3fwrn5_fw_cleanup(&info->fw_info);
return ret;
}
static int s3fwrn5_nci_open(struct nci_dev *ndev)
{
struct s3fwrn5_info *info = nci_get_drvdata(ndev);
if (s3fwrn5_get_mode(info) != S3FWRN5_MODE_COLD)
return -EBUSY;
s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI);
s3fwrn5_set_wake(info, true);
return 0;
}
static int s3fwrn5_nci_close(struct nci_dev *ndev)
{
struct s3fwrn5_info *info = nci_get_drvdata(ndev);
s3fwrn5_set_wake(info, false);
s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD);
return 0;
}
static int s3fwrn5_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
{
struct s3fwrn5_info *info = nci_get_drvdata(ndev);
int ret;
mutex_lock(&info->mutex);
if (s3fwrn5_get_mode(info) != S3FWRN5_MODE_NCI) {
mutex_unlock(&info->mutex);
return -EINVAL;
}
ret = s3fwrn5_write(info, skb);
if (ret < 0)
kfree_skb(skb);
mutex_unlock(&info->mutex);
return ret;
}
static int s3fwrn5_nci_post_setup(struct nci_dev *ndev)
{
struct s3fwrn5_info *info = nci_get_drvdata(ndev);
int ret;
ret = s3fwrn5_firmware_update(info);
if (ret < 0)
goto out;
/* NCI core reset */
s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI);
s3fwrn5_set_wake(info, true);
ret = nci_core_reset(info->ndev);
if (ret < 0)
goto out;
ret = nci_core_init(info->ndev);
out:
return ret;
}
static struct nci_ops s3fwrn5_nci_ops = {
.open = s3fwrn5_nci_open,
.close = s3fwrn5_nci_close,
.send = s3fwrn5_nci_send,
.post_setup = s3fwrn5_nci_post_setup,
};
int s3fwrn5_probe(struct nci_dev **ndev, void *phy_id, struct device *pdev,
struct s3fwrn5_phy_ops *phy_ops, unsigned int max_payload)
{
struct s3fwrn5_info *info;
int ret;
info = devm_kzalloc(pdev, sizeof(*info), GFP_KERNEL);
if (!info)
return -ENOMEM;
info->phy_id = phy_id;
info->pdev = pdev;
info->phy_ops = phy_ops;
info->max_payload = max_payload;
mutex_init(&info->mutex);
s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD);
s3fwrn5_nci_get_prop_ops(&s3fwrn5_nci_ops.prop_ops,
&s3fwrn5_nci_ops.n_prop_ops);
info->ndev = nci_allocate_device(&s3fwrn5_nci_ops,
S3FWRN5_NFC_PROTOCOLS, 0, 0);
if (!info->ndev)
return -ENOMEM;
nci_set_parent_dev(info->ndev, pdev);
nci_set_drvdata(info->ndev, info);
ret = nci_register_device(info->ndev);
if (ret < 0) {
nci_free_device(info->ndev);
return ret;
}
info->fw_info.ndev = info->ndev;
*ndev = info->ndev;
return ret;
}
EXPORT_SYMBOL(s3fwrn5_probe);
void s3fwrn5_remove(struct nci_dev *ndev)
{
struct s3fwrn5_info *info = nci_get_drvdata(ndev);
s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD);
nci_unregister_device(ndev);
nci_free_device(ndev);
}
EXPORT_SYMBOL(s3fwrn5_remove);
int s3fwrn5_recv_frame(struct nci_dev *ndev, struct sk_buff *skb,
enum s3fwrn5_mode mode)
{
switch (mode) {
case S3FWRN5_MODE_NCI:
return nci_recv_frame(ndev, skb);
case S3FWRN5_MODE_FW:
return s3fwrn5_fw_recv_frame(ndev, skb);
default:
return -ENODEV;
}
}
EXPORT_SYMBOL(s3fwrn5_recv_frame);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("Samsung S3FWRN5 NFC driver");
MODULE_AUTHOR("Robert Baldyga <r.baldyga@samsung.com>");

511
drivers/nfc/s3fwrn5/firmware.c Normal file
View file

@ -0,0 +1,511 @@
/*
* NCI based driver for Samsung S3FWRN5 NFC chip
*
* Copyright (C) 2015 Samsung Electrnoics
* Robert Baldyga <r.baldyga@samsung.com>
*
* 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/>.
*/
#include <linux/completion.h>
#include <linux/firmware.h>
#include <linux/crypto.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;
memcpy(skb_put(skb, S3FWRN5_FW_HDR_SIZE), &hdr, S3FWRN5_FW_HDR_SIZE);
if (len)
memcpy(skb_put(skb, len), 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)
{
struct sk_buff *msg, *rsp = NULL;
struct s3fwrn5_fw_header *hdr;
int ret;
/* Send COMPLETE_UPDATE_MODE command */
ret = s3fwrn5_fw_prep_msg(fw_info, &msg, S3FWRN5_FW_MSG_CMD,
S3FWRN5_FW_CMD_COMPLETE_UPDATE_MODE, 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 = -EPROTO;
kfree_skb(rsp);
return ret;
}
/*
* Firmware header stucture:
*
* 0x00 - 0x0B : Date and time string (w/o NUL termination)
* 0x10 - 0x13 : Firmware version
* 0x14 - 0x17 : Signature address
* 0x18 - 0x1B : Signature size
* 0x1C - 0x1F : Firmware image address
* 0x20 - 0x23 : Firmware sectors count
* 0x24 - 0x27 : Custom signature address
* 0x28 - 0x2B : Custom signature size
*/
#define S3FWRN5_FW_IMAGE_HEADER_SIZE 44
static int s3fwrn5_fw_request_firmware(struct s3fwrn5_fw_info *fw_info)
{
struct s3fwrn5_fw_image *fw = &fw_info->fw;
u32 sig_off;
u32 image_off;
u32 custom_sig_off;
int ret;
ret = request_firmware(&fw->fw, fw_info->fw_name,
&fw_info->ndev->nfc_dev->dev);
if (ret < 0)
return ret;
if (fw->fw->size < S3FWRN5_FW_IMAGE_HEADER_SIZE)
return -EINVAL;
memcpy(fw->date, fw->fw->data + 0x00, 12);
fw->date[12] = '\0';
memcpy(&fw->version, fw->fw->data + 0x10, 4);
memcpy(&sig_off, fw->fw->data + 0x14, 4);
fw->sig = fw->fw->data + sig_off;
memcpy(&fw->sig_size, fw->fw->data + 0x18, 4);
memcpy(&image_off, fw->fw->data + 0x1C, 4);
fw->image = fw->fw->data + image_off;
memcpy(&fw->image_sectors, fw->fw->data + 0x20, 4);
memcpy(&custom_sig_off, fw->fw->data + 0x24, 4);
fw->custom_sig = fw->fw->data + custom_sig_off;
memcpy(&fw->custom_sig_size, fw->fw->data + 0x28, 4);
return 0;
}
static void s3fwrn5_fw_release_firmware(struct s3fwrn5_fw_info *fw_info)
{
release_firmware(fw_info->fw.fw);
}
static int s3fwrn5_fw_get_base_addr(
struct s3fwrn5_fw_cmd_get_bootinfo_rsp *bootinfo, u32 *base_addr)
{
int i;
struct {
u8 version[4];
u32 base_addr;
} match[] = {
{{0x05, 0x00, 0x00, 0x00}, 0x00005000},
{{0x05, 0x00, 0x00, 0x01}, 0x00003000},
{{0x05, 0x00, 0x00, 0x02}, 0x00003000},
{{0x05, 0x00, 0x00, 0x03}, 0x00003000},
{{0x05, 0x00, 0x00, 0x05}, 0x00003000}
};
for (i = 0; i < ARRAY_SIZE(match); ++i)
if (bootinfo->hw_version[0] == match[i].version[0] &&
bootinfo->hw_version[1] == match[i].version[1] &&
bootinfo->hw_version[3] == match[i].version[3]) {
*base_addr = match[i].base_addr;
return 0;
}
return -EINVAL;
}
static inline bool
s3fwrn5_fw_is_custom(struct s3fwrn5_fw_cmd_get_bootinfo_rsp *bootinfo)
{
return !!bootinfo->hw_version[2];
}
int s3fwrn5_fw_setup(struct s3fwrn5_fw_info *fw_info)
{
struct s3fwrn5_fw_cmd_get_bootinfo_rsp bootinfo;
int ret;
/* Get firmware data */
ret = s3fwrn5_fw_request_firmware(fw_info);
if (ret < 0) {
dev_err(&fw_info->ndev->nfc_dev->dev,
"Failed to get fw file, ret=%02x\n", ret);
return ret;
}
/* Get bootloader info */
ret = s3fwrn5_fw_get_bootinfo(fw_info, &bootinfo);
if (ret < 0) {
dev_err(&fw_info->ndev->nfc_dev->dev,
"Failed to get bootinfo, ret=%02x\n", ret);
goto err;
}
/* Match hardware version to obtain firmware base address */
ret = s3fwrn5_fw_get_base_addr(&bootinfo, &fw_info->base_addr);
if (ret < 0) {
dev_err(&fw_info->ndev->nfc_dev->dev,
"Unknown hardware version\n");
goto err;
}
fw_info->sector_size = bootinfo.sector_size;
fw_info->sig_size = s3fwrn5_fw_is_custom(&bootinfo) ?
fw_info->fw.custom_sig_size : fw_info->fw.sig_size;
fw_info->sig = s3fwrn5_fw_is_custom(&bootinfo) ?
fw_info->fw.custom_sig : fw_info->fw.sig;
return 0;
err:
s3fwrn5_fw_release_firmware(fw_info);
return ret;
}
bool s3fwrn5_fw_check_version(struct s3fwrn5_fw_info *fw_info, u32 version)
{
struct s3fwrn5_fw_version *new = (void *) &fw_info->fw.version;
struct s3fwrn5_fw_version *old = (void *) &version;
if (new->major > old->major)
return true;
if (new->build1 > old->build1)
return true;
if (new->build2 > old->build2)
return true;
return false;
}
int s3fwrn5_fw_download(struct s3fwrn5_fw_info *fw_info)
{
struct s3fwrn5_fw_image *fw = &fw_info->fw;
u8 hash_data[SHA1_DIGEST_SIZE];
struct scatterlist sg;
struct hash_desc desc;
u32 image_size, off;
int ret;
image_size = fw_info->sector_size * fw->image_sectors;
/* Compute SHA of firmware data */
sg_init_one(&sg, fw->image, image_size);
desc.tfm = crypto_alloc_hash("sha1", 0, CRYPTO_ALG_ASYNC);
crypto_hash_init(&desc);
crypto_hash_update(&desc, &sg, image_size);
crypto_hash_final(&desc, hash_data);
crypto_free_hash(desc.tfm);
/* Firmware update process */
dev_info(&fw_info->ndev->nfc_dev->dev,
"Firmware update: %s\n", fw_info->fw_name);
ret = s3fwrn5_fw_enter_update_mode(fw_info, hash_data,
SHA1_DIGEST_SIZE, fw_info->sig, fw_info->sig_size);
if (ret < 0) {
dev_err(&fw_info->ndev->nfc_dev->dev,
"Unable to enter update mode\n");
goto out;
}
for (off = 0; off < image_size; off += fw_info->sector_size) {
ret = s3fwrn5_fw_update_sector(fw_info,
fw_info->base_addr + off, fw->image + off);
if (ret < 0) {
dev_err(&fw_info->ndev->nfc_dev->dev,
"Firmware update error (code=%d)\n", ret);
goto out;
}
}
ret = s3fwrn5_fw_complete_update_mode(fw_info);
if (ret < 0) {
dev_err(&fw_info->ndev->nfc_dev->dev,
"Unable to complete update mode\n");
goto out;
}
dev_info(&fw_info->ndev->nfc_dev->dev,
"Firmware update: success\n");
out:
return ret;
}
void s3fwrn5_fw_init(struct s3fwrn5_fw_info *fw_info, const char *fw_name)
{
fw_info->parity = 0x00;
fw_info->rsp = NULL;
fw_info->fw.fw = NULL;
strcpy(fw_info->fw_name, fw_name);
init_completion(&fw_info->completion);
}
void s3fwrn5_fw_cleanup(struct s3fwrn5_fw_info *fw_info)
{
s3fwrn5_fw_release_firmware(fw_info);
}
int s3fwrn5_fw_recv_frame(struct nci_dev *ndev, struct sk_buff *skb)
{
struct s3fwrn5_info *info = nci_get_drvdata(ndev);
struct s3fwrn5_fw_info *fw_info = &info->fw_info;
BUG_ON(fw_info->rsp);
fw_info->rsp = skb;
complete(&fw_info->completion);
return 0;
}

111
drivers/nfc/s3fwrn5/firmware.h Normal file
View file

@ -0,0 +1,111 @@
/*
* NCI based driver for Samsung S3FWRN5 NFC chip
*
* Copyright (C) 2015 Samsung Electrnoics
* Robert Baldyga <r.baldyga@samsung.com>
*
* 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/>.
*/
#ifndef __LOCAL_S3FWRN5_FIRMWARE_H_
#define __LOCAL_S3FWRN5_FIRMWARE_H_
/* FW Message Types */
#define S3FWRN5_FW_MSG_CMD 0x00
#define S3FWRN5_FW_MSG_RSP 0x01
#define S3FWRN5_FW_MSG_DATA 0x02
/* FW Return Codes */
#define S3FWRN5_FW_RET_SUCCESS 0x00
#define S3FWRN5_FW_RET_MESSAGE_TYPE_INVALID 0x01
#define S3FWRN5_FW_RET_COMMAND_INVALID 0x02
#define S3FWRN5_FW_RET_PAGE_DATA_OVERFLOW 0x03
#define S3FWRN5_FW_RET_SECT_DATA_OVERFLOW 0x04
#define S3FWRN5_FW_RET_AUTHENTICATION_FAIL 0x05
#define S3FWRN5_FW_RET_FLASH_OPERATION_FAIL 0x06
#define S3FWRN5_FW_RET_ADDRESS_OUT_OF_RANGE 0x07
#define S3FWRN5_FW_RET_PARAMETER_INVALID 0x08
/* ---- FW Packet structures ---- */
#define S3FWRN5_FW_HDR_SIZE 4
struct s3fwrn5_fw_header {
__u8 type;
__u8 code;
__u16 len;
};
#define S3FWRN5_FW_CMD_RESET 0x00
#define S3FWRN5_FW_CMD_GET_BOOTINFO 0x01
struct s3fwrn5_fw_cmd_get_bootinfo_rsp {
__u8 hw_version[4];
__u16 sector_size;
__u16 page_size;
__u16 frame_max_size;
__u16 hw_buffer_size;
};
#define S3FWRN5_FW_CMD_ENTER_UPDATE_MODE 0x02
struct s3fwrn5_fw_cmd_enter_updatemode {
__u16 hashcode_size;
__u16 signature_size;
};
#define S3FWRN5_FW_CMD_UPDATE_SECTOR 0x04
struct s3fwrn5_fw_cmd_update_sector {
__u32 base_address;
};
#define S3FWRN5_FW_CMD_COMPLETE_UPDATE_MODE 0x05
struct s3fwrn5_fw_image {
const struct firmware *fw;
char date[13];
u32 version;
const void *sig;
u32 sig_size;
const void *image;
u32 image_sectors;
const void *custom_sig;
u32 custom_sig_size;
};
struct s3fwrn5_fw_info {
struct nci_dev *ndev;
struct s3fwrn5_fw_image fw;
char fw_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
const void *sig;
u32 sig_size;
u32 sector_size;
u32 base_addr;
struct completion completion;
struct sk_buff *rsp;
char parity;
};
void s3fwrn5_fw_init(struct s3fwrn5_fw_info *fw_info, const char *fw_name);
int s3fwrn5_fw_setup(struct s3fwrn5_fw_info *fw_info);
bool s3fwrn5_fw_check_version(struct s3fwrn5_fw_info *fw_info, u32 version);
int s3fwrn5_fw_download(struct s3fwrn5_fw_info *fw_info);
void s3fwrn5_fw_cleanup(struct s3fwrn5_fw_info *fw_info);
int s3fwrn5_fw_recv_frame(struct nci_dev *ndev, struct sk_buff *skb);
#endif /* __LOCAL_S3FWRN5_FIRMWARE_H_ */

306
drivers/nfc/s3fwrn5/i2c.c Normal file
View file

@ -0,0 +1,306 @@
/*
* I2C Link Layer for Samsung S3FWRN5 NCI based Driver
*
* Copyright (C) 2015 Samsung Electrnoics
* Robert Baldyga <r.baldyga@samsung.com>
*
* 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/>.
*/
#include <linux/i2c.h>
#include <linux/gpio.h>
#include <linux/delay.h>
#include <linux/of_gpio.h>
#include <linux/of_irq.h>
#include <linux/module.h>
#include <net/nfc/nfc.h>
#include "s3fwrn5.h"
#define S3FWRN5_I2C_DRIVER_NAME "s3fwrn5_i2c"
#define S3FWRN5_I2C_MAX_PAYLOAD 32
#define S3FWRN5_EN_WAIT_TIME 150
struct s3fwrn5_i2c_phy {
struct i2c_client *i2c_dev;
struct nci_dev *ndev;
unsigned int gpio_en;
unsigned int gpio_fw_wake;
struct mutex mutex;
enum s3fwrn5_mode mode;
unsigned int irq_skip:1;
};
static void s3fwrn5_i2c_set_wake(void *phy_id, bool wake)
{
struct s3fwrn5_i2c_phy *phy = phy_id;
mutex_lock(&phy->mutex);
gpio_set_value(phy->gpio_fw_wake, wake);
msleep(S3FWRN5_EN_WAIT_TIME/2);
mutex_unlock(&phy->mutex);
}
static void s3fwrn5_i2c_set_mode(void *phy_id, enum s3fwrn5_mode mode)
{
struct s3fwrn5_i2c_phy *phy = phy_id;
mutex_lock(&phy->mutex);
if (phy->mode == mode)
goto out;
phy->mode = mode;
gpio_set_value(phy->gpio_en, 1);
gpio_set_value(phy->gpio_fw_wake, 0);
if (mode == S3FWRN5_MODE_FW)
gpio_set_value(phy->gpio_fw_wake, 1);
if (mode != S3FWRN5_MODE_COLD) {
msleep(S3FWRN5_EN_WAIT_TIME);
gpio_set_value(phy->gpio_en, 0);
msleep(S3FWRN5_EN_WAIT_TIME/2);
}
phy->irq_skip = true;
out:
mutex_unlock(&phy->mutex);
}
static enum s3fwrn5_mode s3fwrn5_i2c_get_mode(void *phy_id)
{
struct s3fwrn5_i2c_phy *phy = phy_id;
enum s3fwrn5_mode mode;
mutex_lock(&phy->mutex);
mode = phy->mode;
mutex_unlock(&phy->mutex);
return mode;
}
static int s3fwrn5_i2c_write(void *phy_id, struct sk_buff *skb)
{
struct s3fwrn5_i2c_phy *phy = phy_id;
int ret;
mutex_lock(&phy->mutex);
phy->irq_skip = false;
ret = i2c_master_send(phy->i2c_dev, skb->data, skb->len);
if (ret == -EREMOTEIO) {
/* Retry, chip was in standby */
usleep_range(110000, 120000);
ret = i2c_master_send(phy->i2c_dev, skb->data, skb->len);
}
mutex_unlock(&phy->mutex);
if (ret < 0)
return ret;
if (ret != skb->len)
return -EREMOTEIO;
return 0;
}
static struct s3fwrn5_phy_ops i2c_phy_ops = {
.set_wake = s3fwrn5_i2c_set_wake,
.set_mode = s3fwrn5_i2c_set_mode,
.get_mode = s3fwrn5_i2c_get_mode,
.write = s3fwrn5_i2c_write,
};
static int s3fwrn5_i2c_read(struct s3fwrn5_i2c_phy *phy)
{
struct sk_buff *skb;
size_t hdr_size;
size_t data_len;
char hdr[4];
int ret;
hdr_size = (phy->mode == S3FWRN5_MODE_NCI) ?
NCI_CTRL_HDR_SIZE : S3FWRN5_FW_HDR_SIZE;
ret = i2c_master_recv(phy->i2c_dev, hdr, hdr_size);
if (ret < 0)
return ret;
if (ret < hdr_size)
return -EBADMSG;
data_len = (phy->mode == S3FWRN5_MODE_NCI) ?
((struct nci_ctrl_hdr *)hdr)->plen :
((struct s3fwrn5_fw_header *)hdr)->len;
skb = alloc_skb(hdr_size + data_len, GFP_KERNEL);
if (!skb)
return -ENOMEM;
memcpy(skb_put(skb, hdr_size), hdr, hdr_size);
if (data_len == 0)
goto out;
ret = i2c_master_recv(phy->i2c_dev, skb_put(skb, data_len), data_len);
if (ret != data_len) {
kfree_skb(skb);
return -EBADMSG;
}
out:
return s3fwrn5_recv_frame(phy->ndev, skb, phy->mode);
}
static irqreturn_t s3fwrn5_i2c_irq_thread_fn(int irq, void *phy_id)
{
struct s3fwrn5_i2c_phy *phy = phy_id;
int ret = 0;
if (!phy || !phy->ndev) {
WARN_ON_ONCE(1);
return IRQ_NONE;
}
mutex_lock(&phy->mutex);
if (phy->irq_skip)
goto out;
switch (phy->mode) {
case S3FWRN5_MODE_NCI:
case S3FWRN5_MODE_FW:
ret = s3fwrn5_i2c_read(phy);
break;
case S3FWRN5_MODE_COLD:
ret = -EREMOTEIO;
break;
}
out:
mutex_unlock(&phy->mutex);
return IRQ_HANDLED;
}
static int s3fwrn5_i2c_parse_dt(struct i2c_client *client)
{
struct s3fwrn5_i2c_phy *phy = i2c_get_clientdata(client);
struct device_node *np = client->dev.of_node;
if (!np)
return -ENODEV;
phy->gpio_en = of_get_named_gpio(np, "s3fwrn5,en-gpios", 0);
if (!gpio_is_valid(phy->gpio_en))
return -ENODEV;
phy->gpio_fw_wake = of_get_named_gpio(np, "s3fwrn5,fw-gpios", 0);
if (!gpio_is_valid(phy->gpio_fw_wake))
return -ENODEV;
return 0;
}
static int s3fwrn5_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct s3fwrn5_i2c_phy *phy;
int ret;
phy = devm_kzalloc(&client->dev, sizeof(*phy), GFP_KERNEL);
if (!phy)
return -ENOMEM;
mutex_init(&phy->mutex);
phy->mode = S3FWRN5_MODE_COLD;
phy->irq_skip = true;
phy->i2c_dev = client;
i2c_set_clientdata(client, phy);
ret = s3fwrn5_i2c_parse_dt(client);
if (ret < 0)
return ret;
ret = devm_gpio_request_one(&phy->i2c_dev->dev, phy->gpio_en,
GPIOF_OUT_INIT_HIGH, "s3fwrn5_en");
if (ret < 0)
return ret;
ret = devm_gpio_request_one(&phy->i2c_dev->dev, phy->gpio_fw_wake,
GPIOF_OUT_INIT_LOW, "s3fwrn5_fw_wake");
if (ret < 0)
return ret;
ret = s3fwrn5_probe(&phy->ndev, phy, &phy->i2c_dev->dev, &i2c_phy_ops,
S3FWRN5_I2C_MAX_PAYLOAD);
if (ret < 0)
return ret;
ret = request_threaded_irq(phy->i2c_dev->irq, NULL,
s3fwrn5_i2c_irq_thread_fn, IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
S3FWRN5_I2C_DRIVER_NAME, phy);
if (ret)
s3fwrn5_remove(phy->ndev);
return ret;
}
static int s3fwrn5_i2c_remove(struct i2c_client *client)
{
struct s3fwrn5_i2c_phy *phy = i2c_get_clientdata(client);
s3fwrn5_remove(phy->ndev);
return 0;
}
static struct i2c_device_id s3fwrn5_i2c_id_table[] = {
{S3FWRN5_I2C_DRIVER_NAME, 0},
{}
};
MODULE_DEVICE_TABLE(i2c, s3fwrn5_i2c_id_table);
static const struct of_device_id of_s3fwrn5_i2c_match[] = {
{ .compatible = "samsung,s3fwrn5-i2c", },
{}
};
MODULE_DEVICE_TABLE(of, of_s3fwrn5_i2c_match);
static struct i2c_driver s3fwrn5_i2c_driver = {
.driver = {
.owner = THIS_MODULE,
.name = S3FWRN5_I2C_DRIVER_NAME,
.of_match_table = of_match_ptr(of_s3fwrn5_i2c_match),
},
.probe = s3fwrn5_i2c_probe,
.remove = s3fwrn5_i2c_remove,
.id_table = s3fwrn5_i2c_id_table,
};
module_i2c_driver(s3fwrn5_i2c_driver);
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("I2C driver for Samsung S3FWRN5");
MODULE_AUTHOR("Robert Baldyga <r.baldyga@samsung.com>");

165
drivers/nfc/s3fwrn5/nci.c Normal file
View file

@ -0,0 +1,165 @@
/*
* NCI based driver for Samsung S3FWRN5 NFC chip
*
* Copyright (C) 2015 Samsung Electrnoics
* Robert Baldyga <r.baldyga@samsung.com>
*
* 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/>.
*/
#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_prop_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_prop_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;
}

89
drivers/nfc/s3fwrn5/nci.h Normal file
View file

@ -0,0 +1,89 @@
/*
* NCI based driver for Samsung S3FWRN5 NFC chip
*
* Copyright (C) 2015 Samsung Electrnoics
* Robert Baldyga <r.baldyga@samsung.com>
*
* 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/>.
*/
#ifndef __LOCAL_S3FWRN5_NCI_H_
#define __LOCAL_S3FWRN5_NCI_H_
#include "s3fwrn5.h"
#define NCI_PROP_AGAIN 0x01
#define NCI_PROP_GET_RFREG 0x21
#define NCI_PROP_SET_RFREG 0x22
struct nci_prop_set_rfreg_cmd {
__u8 index;
__u8 data[252];
};
struct nci_prop_set_rfreg_rsp {
__u8 status;
};
#define NCI_PROP_GET_RFREG_VER 0x24
struct nci_prop_get_rfreg_ver_rsp {
__u8 status;
__u8 data[8];
};
#define NCI_PROP_SET_RFREG_VER 0x25
struct nci_prop_set_rfreg_ver_cmd {
__u8 data[8];
};
struct nci_prop_set_rfreg_ver_rsp {
__u8 status;
};
#define NCI_PROP_START_RFREG 0x26
struct nci_prop_start_rfreg_rsp {
__u8 status;
};
#define NCI_PROP_STOP_RFREG 0x27
struct nci_prop_stop_rfreg_cmd {
__u16 checksum;
};
struct nci_prop_stop_rfreg_rsp {
__u8 status;
};
#define NCI_PROP_FW_CFG 0x28
struct nci_prop_fw_cfg_cmd {
__u8 clk_type;
__u8 clk_speed;
__u8 clk_req;
};
struct nci_prop_fw_cfg_rsp {
__u8 status;
};
#define NCI_PROP_WR_RESET 0x2f
void s3fwrn5_nci_get_prop_ops(struct nci_prop_ops **ops, size_t *n);
int s3fwrn5_nci_rf_configure(struct s3fwrn5_info *info, const char *fw_name);
#endif /* __LOCAL_S3FWRN5_NCI_H_ */

99
drivers/nfc/s3fwrn5/s3fwrn5.h Normal file
View file

@ -0,0 +1,99 @@
/*
* NCI based driver for Samsung S3FWRN5 NFC chip
*
* Copyright (C) 2015 Samsung Electrnoics
* Robert Baldyga <r.baldyga@samsung.com>
*
* 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/>.
*/
#ifndef __LOCAL_S3FWRN5_H_
#define __LOCAL_S3FWRN5_H_
#include <linux/nfc.h>
#include <net/nfc/nci_core.h>
#include "firmware.h"
enum s3fwrn5_mode {
S3FWRN5_MODE_COLD,
S3FWRN5_MODE_NCI,
S3FWRN5_MODE_FW,
};
struct s3fwrn5_phy_ops {
void (*set_wake)(void *id, bool sleep);
void (*set_mode)(void *id, enum s3fwrn5_mode);
enum s3fwrn5_mode (*get_mode)(void *id);
int (*write)(void *id, struct sk_buff *skb);
};
struct s3fwrn5_info {
struct nci_dev *ndev;
void *phy_id;
struct device *pdev;
struct s3fwrn5_phy_ops *phy_ops;
unsigned int max_payload;
struct s3fwrn5_fw_info fw_info;
struct mutex mutex;
};
static inline int s3fwrn5_set_mode(struct s3fwrn5_info *info,
enum s3fwrn5_mode mode)
{
if (!info->phy_ops->set_mode)
return -ENOTSUPP;
info->phy_ops->set_mode(info->phy_id, mode);
return 0;
}
static inline enum s3fwrn5_mode s3fwrn5_get_mode(struct s3fwrn5_info *info)
{
if (!info->phy_ops->get_mode)
return -ENOTSUPP;
return info->phy_ops->get_mode(info->phy_id);
}
static inline int s3fwrn5_set_wake(struct s3fwrn5_info *info, bool wake)
{
if (!info->phy_ops->set_wake)
return -ENOTSUPP;
info->phy_ops->set_wake(info->phy_id, wake);
return 0;
}
static inline int s3fwrn5_write(struct s3fwrn5_info *info, struct sk_buff *skb)
{
if (!info->phy_ops->write)
return -ENOTSUPP;
return info->phy_ops->write(info->phy_id, skb);
}
int s3fwrn5_probe(struct nci_dev **ndev, void *phy_id, struct device *pdev,
struct s3fwrn5_phy_ops *phy_ops, unsigned int max_payload);
void s3fwrn5_remove(struct nci_dev *ndev);
int s3fwrn5_recv_frame(struct nci_dev *ndev, struct sk_buff *skb,
enum s3fwrn5_mode mode);
#endif /* __LOCAL_S3FWRN5_H_ */