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Message-id: <1438266376-11229-1-git-send-email-r.baldyga@samsung.com>
Date: Thu, 30 Jul 2015 16:26:16 +0200
From: Robert Baldyga <r.baldyga@...sung.com>
To: lauro.venancio@...nbossa.org, aloisio.almeida@...nbossa.org,
sameo@...ux.intel.com
Cc: robh+dt@...nel.org, pawel.moll@....com, mark.rutland@....com,
ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
linux-wireless@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-nfc@...ts.01.org,
m.szyprowski@...sung.com, pebolle@...cali.nl,
Robert Baldyga <r.baldyga@...sung.com>
Subject: [PATCH v2] nfc: s3fwrn5: Add driver for Samsung S3FWRN5 NFC Chip
Add driver for Samsung S3FWRN5 NFC controller.
S3FWRN5 is using NCI protocol and I2C communication interface.
Signed-off-by: Robert Baldyga <r.baldyga@...sung.com>
---
Changelog:
v2:
- Adressed comments from Paul Bolle
v1: http://www.spinics.net/lists/kernel/msg2044290.html
.../devicetree/bindings/net/nfc/s3fwrn5.txt | 27 ++
MAINTAINERS | 6 +
drivers/nfc/Kconfig | 1 +
drivers/nfc/Makefile | 1 +
drivers/nfc/s3fwrn5/Kconfig | 19 +
drivers/nfc/s3fwrn5/Makefile | 11 +
drivers/nfc/s3fwrn5/core.c | 232 +++++++++
drivers/nfc/s3fwrn5/firmware.c | 522 +++++++++++++++++++++
drivers/nfc/s3fwrn5/firmware.h | 111 +++++
drivers/nfc/s3fwrn5/i2c.c | 367 +++++++++++++++
drivers/nfc/s3fwrn5/nci.c | 364 ++++++++++++++
drivers/nfc/s3fwrn5/nci.h | 101 ++++
drivers/nfc/s3fwrn5/s3fwrn5.h | 104 ++++
13 files changed, 1866 insertions(+)
create mode 100644 Documentation/devicetree/bindings/net/nfc/s3fwrn5.txt
create mode 100644 drivers/nfc/s3fwrn5/Kconfig
create mode 100644 drivers/nfc/s3fwrn5/Makefile
create mode 100644 drivers/nfc/s3fwrn5/core.c
create mode 100644 drivers/nfc/s3fwrn5/firmware.c
create mode 100644 drivers/nfc/s3fwrn5/firmware.h
create mode 100644 drivers/nfc/s3fwrn5/i2c.c
create mode 100644 drivers/nfc/s3fwrn5/nci.c
create mode 100644 drivers/nfc/s3fwrn5/nci.h
create mode 100644 drivers/nfc/s3fwrn5/s3fwrn5.h
diff --git a/Documentation/devicetree/bindings/net/nfc/s3fwrn5.txt b/Documentation/devicetree/bindings/net/nfc/s3fwrn5.txt
new file mode 100644
index 0000000..fb1e75f
--- /dev/null
+++ b/Documentation/devicetree/bindings/net/nfc/s3fwrn5.txt
@@ -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>;
+ };
+};
diff --git a/MAINTAINERS b/MAINTAINERS
index 3a4b7cb..72efe7c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8586,6 +8586,12 @@ L: linux-media@...r.kernel.org
S: Supported
F: drivers/media/i2c/s5k5baf.c
+SAMSUNG S3FWRN5 NFC DRIVER
+M: Robert Baldyga <r.baldyga@...sung.com>
+L: linux-nfc@...ts.01.org (moderated for non-subscribers)
+S: Supported
+F: drivers/nfc/s3fwrn5
+
SAMSUNG SOC CLOCK DRIVERS
M: Sylwester Nawrocki <s.nawrocki@...sung.com>
M: Tomasz Figa <tomasz.figa@...il.com>
diff --git a/drivers/nfc/Kconfig b/drivers/nfc/Kconfig
index 722673c..6639cd1 100644
--- a/drivers/nfc/Kconfig
+++ b/drivers/nfc/Kconfig
@@ -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
diff --git a/drivers/nfc/Makefile b/drivers/nfc/Makefile
index 368b6df..2757fe1 100644
--- a/drivers/nfc/Makefile
+++ b/drivers/nfc/Makefile
@@ -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-$(CONFIG_NFC_S3FWRN5) += s3fwrn5/
diff --git a/drivers/nfc/s3fwrn5/Kconfig b/drivers/nfc/s3fwrn5/Kconfig
new file mode 100644
index 0000000..7e3b255
--- /dev/null
+++ b/drivers/nfc/s3fwrn5/Kconfig
@@ -0,0 +1,19 @@
+config NFC_S3FWRN5
+ tristate
+ ---help---
+ Core driver for Samsung S3FWRN5 NFC chip. Contains core utilities
+ of chip. It's intended to be used by PHYs to avoid duplicating lots
+ of common code.
+
+config NFC_S3FWRN5_I2C
+ tristate "Samsung S3FWRN5 I2C support"
+ depends on NFC_NCI && I2C
+ select NFC_S3FWRN5
+ default n
+ ---help---
+ This module adds support for an I2C interface to the S3FWRN5 chip.
+ Select this if your platform is using the I2C bus.
+
+ To compile this driver as a module, choose m here. The module will
+ be called s3fwrn5_i2c.ko.
+ Say N if unsure.
diff --git a/drivers/nfc/s3fwrn5/Makefile b/drivers/nfc/s3fwrn5/Makefile
new file mode 100644
index 0000000..3381c34
--- /dev/null
+++ b/drivers/nfc/s3fwrn5/Makefile
@@ -0,0 +1,11 @@
+#
+# Makefile for Samsung S3FWRN5 NFC driver
+#
+
+s3fwrn5-objs = core.o firmware.o nci.o
+s3fwrn5_i2c-objs = i2c.o
+
+obj-$(CONFIG_NFC_S3FWRN5) += s3fwrn5.o
+obj-$(CONFIG_NFC_S3FWRN5_I2C) += s3fwrn5_i2c.o
+
+ccflags-$(CONFIG_NFC_DEBUG) := -DDEBUG
diff --git a/drivers/nfc/s3fwrn5/core.c b/drivers/nfc/s3fwrn5/core.c
new file mode 100644
index 0000000..2936750
--- /dev/null
+++ b/drivers/nfc/s3fwrn5/core.c
@@ -0,0 +1,232 @@
+/*
+ * NCI based driver for Samsung S3FWRN5 NFC chip
+ *
+ * Copyright (C) 2015 Samsung Electrnoics
+ * Robert Baldyga <r.baldyga@...sung.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"
+
+#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)
+{
+ u32 version;
+ bool need_update;
+ int ret;
+
+ ENTER();
+
+ s3fwrn5_fw_init(&info->fw_info, "sec_s3fwrn5_firmware.bin");
+ s3fwrn5_nci_init(&info->nci_info, "sec_s3fwrn5_rfreg.bin");
+ info->custom_nci = true;
+
+ /* Read firmware version */
+
+ s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI);
+
+ s3fwrn5_set_wake(info, true);
+ ret = s3fwrn5_nci_get_fw_version(&info->nci_info, &version);
+ s3fwrn5_set_wake(info, false);
+ if (ret < 0)
+ goto out;
+
+ /* Update firmware */
+
+ s3fwrn5_set_mode(info, S3FWRN5_MODE_FW);
+
+ ret = s3fwrn5_fw_setup(&info->fw_info);
+ if (ret < 0)
+ goto out;
+
+ need_update = s3fwrn5_fw_check_version(&info->fw_info, version);
+ 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->nci_info);
+ s3fwrn5_set_wake(info, false);
+
+out:
+ s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD);
+ s3fwrn5_fw_cleanup(&info->fw_info);
+ info->custom_nci = false;
+ return ret;
+}
+
+static int s3fwrn5_nci_open(struct nci_dev *ndev)
+{
+ struct s3fwrn5_info *info = nci_get_drvdata(ndev);
+ int ret;
+
+ ENTER();
+
+ mutex_lock(&info->mutex);
+
+ if (s3fwrn5_get_mode(info) != S3FWRN5_MODE_COLD) {
+ ret = -EBUSY;
+ goto out;
+ }
+
+ ret = s3fwrn5_firmware_update(info);
+
+ s3fwrn5_set_mode(info, S3FWRN5_MODE_NCI);
+ s3fwrn5_set_wake(info, true);
+out:
+ mutex_unlock(&info->mutex);
+ return ret;
+}
+
+static int s3fwrn5_nci_close(struct nci_dev *ndev)
+{
+ struct s3fwrn5_info *info = nci_get_drvdata(ndev);
+
+ ENTER();
+
+ mutex_lock(&info->mutex);
+
+ s3fwrn5_set_wake(info, false);
+ s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD);
+
+ mutex_unlock(&info->mutex);
+ 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;
+
+ ENTER();
+
+ mutex_lock(&info->mutex);
+
+ if (s3fwrn5_get_mode(info) != S3FWRN5_MODE_NCI)
+ return -EINVAL;
+
+ ret = s3fwrn5_write(info, skb);
+ if (ret < 0)
+ kfree_skb(skb);
+
+ mutex_unlock(&info->mutex);
+ return ret;
+}
+
+static struct nci_ops s3fwrn5_nci_ops = {
+ .open = s3fwrn5_nci_open,
+ .close = s3fwrn5_nci_close,
+ .send = s3fwrn5_nci_send,
+};
+
+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;
+
+ ENTER();
+
+ 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;
+ info->custom_nci = false;
+ mutex_init(&info->mutex);
+
+ s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD);
+
+ 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;
+ info->nci_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);
+
+ ENTER();
+
+ mutex_lock(&info->mutex);
+
+ s3fwrn5_set_mode(info, S3FWRN5_MODE_COLD);
+
+ nci_unregister_device(ndev);
+ nci_free_device(ndev);
+
+ mutex_unlock(&info->mutex);
+}
+EXPORT_SYMBOL(s3fwrn5_remove);
+
+int s3fwrn5_recv_frame(struct nci_dev *ndev, struct sk_buff *skb,
+ enum s3fwrn5_mode mode)
+{
+ struct s3fwrn5_info *info = nci_get_drvdata(ndev);
+
+ switch (mode) {
+ case S3FWRN5_MODE_NCI:
+ return info->custom_nci ?
+ s3fwrn5_nci_recv_frame(ndev, skb) :
+ 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@...sung.com>");
diff --git a/drivers/nfc/s3fwrn5/firmware.c b/drivers/nfc/s3fwrn5/firmware.c
new file mode 100644
index 0000000..dfaa971
--- /dev/null
+++ b/drivers/nfc/s3fwrn5/firmware.c
@@ -0,0 +1,522 @@
+/*
+ * NCI based driver for Samsung S3FWRN5 NFC chip
+ *
+ * Copyright (C) 2015 Samsung Electrnoics
+ * Robert Baldyga <r.baldyga@...sung.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;
+
+ ret = s3fwrn5_write(info, msg);
+ if (ret < 0)
+ return ret;
+
+ reinit_completion(&fw_info->completion);
+
+ 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);
+}
+
+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;
+}
+
+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;
+
+ ENTER();
+
+ /* 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;
+
+ ENTER("new=%08x old=%08x", fw_info->fw.version, 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;
+
+ ENTER();
+
+ 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)
+{
+ ENTER();
+
+ 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)
+{
+ ENTER();
+
+ 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;
+
+ ENTER();
+
+ BUG_ON(fw_info->rsp);
+
+ fw_info->rsp = skb;
+
+ complete(&fw_info->completion);
+
+ return 0;
+}
diff --git a/drivers/nfc/s3fwrn5/firmware.h b/drivers/nfc/s3fwrn5/firmware.h
new file mode 100644
index 0000000..1ec0647
--- /dev/null
+++ b/drivers/nfc/s3fwrn5/firmware.h
@@ -0,0 +1,111 @@
+/*
+ * NCI based driver for Samsung S3FWRN5 NFC chip
+ *
+ * Copyright (C) 2015 Samsung Electrnoics
+ * Robert Baldyga <r.baldyga@...sung.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_ */
diff --git a/drivers/nfc/s3fwrn5/i2c.c b/drivers/nfc/s3fwrn5/i2c.c
new file mode 100644
index 0000000..b28db4b
--- /dev/null
+++ b/drivers/nfc/s3fwrn5/i2c.c
@@ -0,0 +1,367 @@
+/*
+ * I2C Link Layer for Samsung S3FWRN5 NCI based Driver
+ *
+ * Copyright (C) 2015 Samsung Electrnoics
+ * Robert Baldyga <r.baldyga@...sung.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
+
+#define DUMP_SKB(name, skb) \
+ do { \
+ int i; \
+ pr_debug("%s", name); \
+ for (i = 0; i < (skb)->len; ++i) \
+ pr_debug(" %02x", (skb)->data[i]); \
+ pr_debug("\n"); \
+ } while (0)
+
+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;
+
+ ENTER("%s", wake ? "true" : "false");
+
+ 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);
+
+ ENTER("%s", (mode == S3FWRN5_MODE_COLD) ? "COLD" :
+ (mode == S3FWRN5_MODE_NCI) ? "NCI" : "FW");
+
+ 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);
+
+ ENTER("%s", (phy->mode == S3FWRN5_MODE_COLD) ? "COLD" :
+ (phy->mode == S3FWRN5_MODE_NCI) ? "NCI" : "FW");
+
+ 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;
+
+ ENTER();
+
+ DUMP_SKB("W:", skb);
+
+ 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_fw_read(struct s3fwrn5_i2c_phy *phy)
+{
+ struct s3fwrn5_fw_header hdr;
+ struct sk_buff *skb;
+ int ret;
+
+ ENTER();
+
+ ret = i2c_master_recv(phy->i2c_dev, (char *)&hdr, S3FWRN5_FW_HDR_SIZE);
+ if (ret < 0)
+ return ret;
+
+ if (ret < S3FWRN5_FW_HDR_SIZE)
+ return -EBADMSG;
+
+ skb = alloc_skb(S3FWRN5_FW_HDR_SIZE + hdr.len, GFP_KERNEL);
+ if (!skb)
+ return -ENOMEM;
+
+ memcpy(skb_put(skb, S3FWRN5_FW_HDR_SIZE), &hdr, S3FWRN5_FW_HDR_SIZE);
+
+ if (hdr.len == 0)
+ goto out;
+
+ ret = i2c_master_recv(phy->i2c_dev, skb_put(skb, hdr.len), hdr.len);
+ if (ret != hdr.len) {
+ kfree_skb(skb);
+ return -EBADMSG;
+ }
+
+out:
+ DUMP_SKB("FW R:", skb);
+
+ return s3fwrn5_recv_frame(phy->ndev, skb, S3FWRN5_MODE_FW);
+}
+
+static int s3fwrn5_i2c_nci_read(struct s3fwrn5_i2c_phy *phy)
+{
+ struct nci_ctrl_hdr hdr;
+ struct sk_buff *skb;
+ int ret;
+
+ ENTER();
+
+ ret = i2c_master_recv(phy->i2c_dev, (char *)&hdr, NCI_CTRL_HDR_SIZE);
+ if (ret < 0)
+ return ret;
+
+ if (ret < NCI_CTRL_HDR_SIZE)
+ return -EBADMSG;
+
+ skb = alloc_skb(NCI_CTRL_HDR_SIZE + hdr.plen, GFP_KERNEL);
+ if (!skb)
+ return -ENOMEM;
+
+ memcpy(skb_put(skb, NCI_CTRL_HDR_SIZE), &hdr, NCI_CTRL_HDR_SIZE);
+
+ if (hdr.plen == 0)
+ goto out;
+
+ ret = i2c_master_recv(phy->i2c_dev, skb_put(skb, hdr.plen), hdr.plen);
+ if (ret != hdr.plen) {
+ kfree_skb(skb);
+ return -EBADMSG;
+ }
+
+out:
+ DUMP_SKB("R:", skb);
+
+ return s3fwrn5_recv_frame(phy->ndev, skb, S3FWRN5_MODE_NCI);
+}
+
+static irqreturn_t s3fwrn5_i2c_irq_thread_fn(int irq, void *phy_id)
+{
+ struct s3fwrn5_i2c_phy *phy = phy_id;
+ int ret = 0;
+
+ ENTER();
+
+ 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:
+ ret = s3fwrn5_i2c_nci_read(phy);
+ break;
+ case S3FWRN5_MODE_FW:
+ ret = s3fwrn5_i2c_fw_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;
+
+ ENTER();
+
+ 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);
+
+ ENTER();
+
+ 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@...sung.com>");
diff --git a/drivers/nfc/s3fwrn5/nci.c b/drivers/nfc/s3fwrn5/nci.c
new file mode 100644
index 0000000..62f18b70
--- /dev/null
+++ b/drivers/nfc/s3fwrn5/nci.c
@@ -0,0 +1,364 @@
+/*
+ * NCI based driver for Samsung S3FWRN5 NFC chip
+ *
+ * Copyright (C) 2015 Samsung Electrnoics
+ * Robert Baldyga <r.baldyga@...sung.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_send_msg(struct s3fwrn5_nci_info *nci_info,
+ struct sk_buff *msg, struct sk_buff **rsp)
+{
+ struct s3fwrn5_info *info =
+ container_of(nci_info, struct s3fwrn5_info, nci_info);
+ long ret;
+
+ ret = s3fwrn5_write(info, msg);
+ if (ret < 0)
+ return ret;
+
+ reinit_completion(&nci_info->completion);
+
+ ret = wait_for_completion_interruptible_timeout(
+ &nci_info->completion, msecs_to_jiffies(1000));
+ if (ret < 0)
+ return ret;
+ else if (ret == 0)
+ return -ENXIO;
+
+ if (!nci_info->rsp)
+ return -EINVAL;
+
+ *rsp = nci_info->rsp;
+ nci_info->rsp = NULL;
+
+ return 0;
+}
+
+static int s3fwrn5_nci_prep_cmd(struct sk_buff **msg,
+ __u16 opcode, int len, const void *data)
+{
+ struct nci_ctrl_hdr hdr;
+ struct sk_buff *skb;
+
+ hdr.gid = nci_opcode_gid(opcode);
+ hdr.oid = nci_opcode_oid(opcode);
+ hdr.plen = len;
+
+ nci_mt_set((__u8 *)&hdr, NCI_MT_CMD_PKT);
+ nci_pbf_set((__u8 *)&hdr, NCI_PBF_LAST);
+
+ skb = alloc_skb(NCI_CTRL_HDR_SIZE + len, GFP_KERNEL);
+ if (!skb)
+ return -ENOMEM;
+
+ memcpy(skb_put(skb, NCI_CTRL_HDR_SIZE), &hdr, NCI_CTRL_HDR_SIZE);
+ if (len)
+ memcpy(skb_put(skb, len), data, len);
+
+ *msg = skb;
+
+ return 0;
+}
+
+static int s3fwrn5_nci_core_reset(struct s3fwrn5_nci_info *nci_info,
+ struct nci_core_reset_cmd *cmd)
+{
+ struct nci_core_reset_rsp *nci_rsp;
+ struct sk_buff *msg, *rsp = NULL;
+ int ret;
+
+ ret = s3fwrn5_nci_prep_cmd(&msg, NCI_OP_CORE_RESET_CMD,
+ sizeof(*cmd), cmd);
+ if (ret < 0)
+ return ret;
+
+ ret = s3fwrn5_nci_send_msg(nci_info, msg, &rsp);
+ kfree_skb(msg);
+ if (ret < 0)
+ goto out;
+
+ nci_rsp = (void *) rsp->data + NCI_CTRL_HDR_SIZE;
+ if (nci_rsp->status != NCI_STATUS_OK)
+ return -EIO;
+
+out:
+ kfree_skb(rsp);
+ return ret;
+}
+
+static int s3fwrn5_nci_core_init_get_version(struct s3fwrn5_nci_info *nci_info,
+ __u32 *version)
+{
+ struct nci_core_init_rsp_1 *nci_rsp;
+ struct sk_buff *msg, *rsp = NULL;
+ struct nci_ctrl_hdr *hdr;
+ int ret;
+
+ ret = s3fwrn5_nci_prep_cmd(&msg, NCI_OP_CORE_INIT_CMD, 0, NULL);
+ if (ret < 0)
+ return ret;
+
+ ret = s3fwrn5_nci_send_msg(nci_info, msg, &rsp);
+ kfree_skb(msg);
+ if (ret < 0)
+ goto out;
+
+ hdr = (void *) rsp->data;
+ if (hdr->plen != 20) {
+ ret = -EIO;
+ goto out;
+ }
+
+ nci_rsp = (void *) rsp->data + NCI_CTRL_HDR_SIZE;
+ if (nci_rsp->status != NCI_STATUS_OK) {
+ ret = -EIO;
+ goto out;
+ }
+
+ memcpy(version, rsp->data + NCI_CTRL_HDR_SIZE + 16, 4);
+
+out:
+ kfree_skb(rsp);
+ return ret;
+}
+
+static int s3fwrn5_nci_start_rfreg(struct s3fwrn5_nci_info *nci_info)
+{
+ struct nci_prop_start_rfreg_rsp *nci_rsp;
+ struct sk_buff *msg, *rsp = NULL;
+ int ret;
+
+ ret = s3fwrn5_nci_prep_cmd(&msg, NCI_OP_PROP_START_RFREG_CMD, 0, NULL);
+ if (ret < 0)
+ return ret;
+
+ ret = s3fwrn5_nci_send_msg(nci_info, msg, &rsp);
+ kfree_skb(msg);
+ if (ret < 0)
+ goto out;
+
+ nci_rsp = (void *) rsp->data + NCI_CTRL_HDR_SIZE;
+ if (nci_rsp->status != NCI_STATUS_OK)
+ ret = -EIO;
+
+out:
+ kfree_skb(rsp);
+ return ret;
+}
+
+static int s3fwrn5_nci_stop_rfreg(struct s3fwrn5_nci_info *nci_info,
+ struct nci_prop_stop_rfreg_cmd *cmd)
+{
+ struct nci_prop_stop_rfreg_rsp *nci_rsp;
+ struct sk_buff *msg, *rsp = NULL;
+ int ret;
+
+ ret = s3fwrn5_nci_prep_cmd(&msg, NCI_OP_PROP_STOP_RFREG_CMD,
+ sizeof(*cmd), cmd);
+ if (ret < 0)
+ return ret;
+
+ ret = s3fwrn5_nci_send_msg(nci_info, msg, &rsp);
+ kfree_skb(msg);
+ if (ret < 0)
+ goto out;
+
+ nci_rsp = (void *) rsp->data + NCI_CTRL_HDR_SIZE;
+ if (nci_rsp->status != NCI_STATUS_OK)
+ ret = -EIO;
+
+out:
+ kfree_skb(rsp);
+ return ret;
+}
+
+static int s3fwrn5_nci_set_rfreg(struct s3fwrn5_nci_info *nci_info,
+ struct nci_prop_set_rfreg_cmd *cmd, int len)
+{
+ struct nci_prop_set_rfreg_rsp *nci_rsp;
+ struct sk_buff *msg, *rsp = NULL;
+ int ret;
+
+ ret = s3fwrn5_nci_prep_cmd(&msg, NCI_OP_PROP_SET_RFREG_CMD,
+ len+1, cmd);
+ if (ret < 0)
+ return ret;
+
+ ret = s3fwrn5_nci_send_msg(nci_info, msg, &rsp);
+ kfree_skb(msg);
+ if (ret < 0)
+ goto out;
+
+ nci_rsp = (void *) rsp->data + NCI_CTRL_HDR_SIZE;
+ if (nci_rsp->status != NCI_STATUS_OK)
+ ret = -EIO;
+
+out:
+ kfree_skb(rsp);
+ return ret;
+}
+
+static int s3fwrn5_nci_fw_cfg(struct s3fwrn5_nci_info *nci_info,
+ struct nci_prop_fw_cfg_cmd *cmd)
+{
+ struct nci_prop_fw_cfg_rsp *nci_rsp;
+ struct sk_buff *msg, *rsp = NULL;
+ int ret;
+
+ ret = s3fwrn5_nci_prep_cmd(&msg, NCI_OP_PROP_FW_CFG_CMD,
+ sizeof(*cmd), cmd);
+ if (ret < 0)
+ return ret;
+
+ ret = s3fwrn5_nci_send_msg(nci_info, msg, &rsp);
+ kfree_skb(msg);
+ if (ret < 0)
+ goto out;
+
+ nci_rsp = (void *) rsp->data + NCI_CTRL_HDR_SIZE;
+ if (nci_rsp->status != NCI_STATUS_OK)
+ ret = -EIO;
+
+out:
+ kfree_skb(rsp);
+ return ret;
+}
+
+#define S3FWRN5_RFREG_SECTION_SIZE 252
+
+int s3fwrn5_nci_rf_configure(struct s3fwrn5_nci_info *nci_info)
+{
+ 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;
+
+ ENTER();
+
+ ret = request_firmware(&fw, nci_info->fw_name,
+ &nci_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 = s3fwrn5_nci_fw_cfg(nci_info, &fw_cfg);
+ if (ret < 0)
+ goto out;
+
+ /* Start rfreg configuration */
+
+ dev_info(&nci_info->ndev->nfc_dev->dev,
+ "rfreg configuration update: %s\n", nci_info->fw_name);
+
+ ret = s3fwrn5_nci_start_rfreg(nci_info);
+ if (ret < 0) {
+ dev_err(&nci_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 = s3fwrn5_nci_set_rfreg(nci_info, &set_rfreg, len);
+ if (ret < 0) {
+ dev_err(&nci_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;
+ s3fwrn5_nci_stop_rfreg(nci_info, &stop_rfreg);
+ if (ret < 0) {
+ dev_err(&nci_info->ndev->nfc_dev->dev,
+ "Unable to stop rfreg update\n");
+ goto out;
+ }
+
+ dev_info(&nci_info->ndev->nfc_dev->dev,
+ "rfreg configuration update: success\n");
+out:
+ release_firmware(fw);
+ return ret;
+}
+
+int s3fwrn5_nci_get_fw_version(struct s3fwrn5_nci_info *nci_info,
+ __u32 *version)
+{
+ struct nci_core_reset_cmd core_reset;
+ int ret;
+
+ ENTER();
+
+ core_reset.reset_type = NCI_RESET_TYPE_RESET_CONFIG;
+
+ ret = s3fwrn5_nci_core_reset(nci_info, &core_reset);
+ if (ret < 0)
+ return ret;
+
+ return s3fwrn5_nci_core_init_get_version(nci_info, version);
+}
+
+void s3fwrn5_nci_init(struct s3fwrn5_nci_info *nci_info, const char *fw_name)
+{
+ ENTER();
+
+ nci_info->rsp = NULL;
+ strcpy(nci_info->fw_name, fw_name);
+ init_completion(&nci_info->completion);
+}
+
+int s3fwrn5_nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb)
+{
+ struct s3fwrn5_info *info = nci_get_drvdata(ndev);
+ struct s3fwrn5_nci_info *nci_info = &info->nci_info;
+
+ ENTER();
+
+ BUG_ON(nci_info->rsp);
+
+ nci_info->rsp = skb;
+
+ complete(&nci_info->completion);
+
+ return 0;
+}
diff --git a/drivers/nfc/s3fwrn5/nci.h b/drivers/nfc/s3fwrn5/nci.h
new file mode 100644
index 0000000..0560095
--- /dev/null
+++ b/drivers/nfc/s3fwrn5/nci.h
@@ -0,0 +1,101 @@
+/*
+ * NCI based driver for Samsung S3FWRN5 NFC chip
+ *
+ * Copyright (C) 2015 Samsung Electrnoics
+ * Robert Baldyga <r.baldyga@...sung.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_
+
+#define NCI_GID_PROP NCI_GID_PROPRIETARY
+
+#define NCI_OP_PROP_AGAIN_CMD nci_opcode_pack(NCI_GID_PROP, 0x01)
+
+#define NCI_OP_PROP_GET_RFREG_CMD nci_opcode_pack(NCI_GID_PROP, 0x21)
+#define NCI_OP_PROP_SET_RFREG_CMD nci_opcode_pack(NCI_GID_PROP, 0x22)
+
+struct nci_prop_set_rfreg_cmd {
+ __u8 index;
+ __u8 data[252];
+};
+
+struct nci_prop_set_rfreg_rsp {
+ __u8 status;
+};
+
+#define NCI_OP_PROP_GET_RFREG_VER_CMD nci_opcode_pack(NCI_GID_PROP, 0x24)
+
+struct nci_prop_get_rfreg_ver_rsp {
+ __u8 status;
+ __u8 data[8];
+};
+
+#define NCI_OP_PROP_SET_RFREG_VER_CMD nci_opcode_pack(NCI_GID_PROP, 0x25)
+
+struct nci_prop_set_rfreg_ver_cmd {
+ __u8 data[8];
+};
+
+struct nci_prop_set_rfreg_ver_rsp {
+ __u8 status;
+};
+
+#define NCI_OP_PROP_START_RFREG_CMD nci_opcode_pack(NCI_GID_PROP, 0x26)
+
+struct nci_prop_start_rfreg_rsp {
+ __u8 status;
+};
+
+#define NCI_OP_PROP_STOP_RFREG_CMD nci_opcode_pack(NCI_GID_PROP, 0x27)
+
+struct nci_prop_stop_rfreg_cmd {
+ __u16 checksum;
+};
+
+struct nci_prop_stop_rfreg_rsp {
+ __u8 status;
+};
+
+#define NCI_OP_PROP_FW_CFG_CMD nci_opcode_pack(NCI_GID_PROP, 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_OP_PROP_WR_RESET_CMD nci_opcode_pack(NCI_GID_PROP, 0x2f)
+
+struct s3fwrn5_nci_info {
+ struct nci_dev *ndev;
+ char fw_name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
+
+ struct completion completion;
+ struct sk_buff *rsp;
+};
+
+void s3fwrn5_nci_init(struct s3fwrn5_nci_info *fw_info, const char *fw_name);
+int s3fwrn5_nci_rf_configure(struct s3fwrn5_nci_info *fw_info);
+int s3fwrn5_nci_get_fw_version(struct s3fwrn5_nci_info *nci_info,
+ __u32 *version);
+
+int s3fwrn5_nci_recv_frame(struct nci_dev *ndev, struct sk_buff *skb);
+
+#endif /* __LOCAL_S3FWRN5_NCI_H_ */
diff --git a/drivers/nfc/s3fwrn5/s3fwrn5.h b/drivers/nfc/s3fwrn5/s3fwrn5.h
new file mode 100644
index 0000000..ba8e40b
--- /dev/null
+++ b/drivers/nfc/s3fwrn5/s3fwrn5.h
@@ -0,0 +1,104 @@
+/*
+ * NCI based driver for Samsung S3FWRN5 NFC chip
+ *
+ * Copyright (C) 2015 Samsung Electrnoics
+ * Robert Baldyga <r.baldyga@...sung.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"
+#include "nci.h"
+
+#define ENTER(format, argv...) pr_debug("%s " format "\n", __func__, ##argv)
+
+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 s3fwrn5_nci_info nci_info;
+ bool custom_nci;
+
+ 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_ */
--
1.9.1
--
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