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-rw-r--r--drivers/nfc/nxp-nci/Kconfig25
-rw-r--r--drivers/nfc/nxp-nci/Makefile11
-rw-r--r--drivers/nfc/nxp-nci/core.c186
-rw-r--r--drivers/nfc/nxp-nci/firmware.c325
-rw-r--r--drivers/nfc/nxp-nci/i2c.c415
-rw-r--r--drivers/nfc/nxp-nci/nxp-nci.h89
6 files changed, 1051 insertions, 0 deletions
diff --git a/drivers/nfc/nxp-nci/Kconfig b/drivers/nfc/nxp-nci/Kconfig
new file mode 100644
index 000000000..37b406125
--- /dev/null
+++ b/drivers/nfc/nxp-nci/Kconfig
@@ -0,0 +1,25 @@
+config NFC_NXP_NCI
+ tristate "NXP-NCI NFC driver"
+ depends on NFC_NCI
+ default n
+ ---help---
+ Generic core driver for NXP NCI chips such as the NPC100
+ or PN7150 families.
+ This is a driver based on the NCI NFC kernel layers and
+ will thus not work with NXP libnfc library.
+
+ To compile this driver as a module, choose m here. The module will
+ be called nxp_nci.
+ Say N if unsure.
+
+config NFC_NXP_NCI_I2C
+ tristate "NXP-NCI I2C support"
+ depends on NFC_NXP_NCI && I2C
+ ---help---
+ This module adds support for an I2C interface to the NXP NCI
+ chips.
+ 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 nxp_nci_i2c.
+ Say Y if unsure.
diff --git a/drivers/nfc/nxp-nci/Makefile b/drivers/nfc/nxp-nci/Makefile
new file mode 100644
index 000000000..c008be30b
--- /dev/null
+++ b/drivers/nfc/nxp-nci/Makefile
@@ -0,0 +1,11 @@
+#
+# Makefile for NXP-NCI NFC driver
+#
+
+nxp-nci-objs = core.o firmware.o
+nxp-nci_i2c-objs = i2c.o
+
+obj-$(CONFIG_NFC_NXP_NCI) += nxp-nci.o
+obj-$(CONFIG_NFC_NXP_NCI_I2C) += nxp-nci_i2c.o
+
+ccflags-$(CONFIG_NFC_DEBUG) := -DDEBUG
diff --git a/drivers/nfc/nxp-nci/core.c b/drivers/nfc/nxp-nci/core.c
new file mode 100644
index 000000000..8979636d4
--- /dev/null
+++ b/drivers/nfc/nxp-nci/core.c
@@ -0,0 +1,186 @@
+/*
+ * Generic driver for NXP NCI NFC chips
+ *
+ * Copyright (C) 2014 NXP Semiconductors All rights reserved.
+ *
+ * Authors: Clément Perrochaud <clement.perrochaud@nxp.com>
+ *
+ * Derived from PN544 device driver:
+ * Copyright (C) 2012 Intel Corporation. All rights reserved.
+ *
+ * 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/>.
+ */
+
+#include <linux/delay.h>
+#include <linux/gpio.h>
+#include <linux/module.h>
+#include <linux/nfc.h>
+#include <linux/platform_data/nxp-nci.h>
+
+#include <net/nfc/nci_core.h>
+
+#include "nxp-nci.h"
+
+#define NXP_NCI_HDR_LEN 4
+
+#define NXP_NCI_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_NFC_DEP_MASK)
+
+static int nxp_nci_open(struct nci_dev *ndev)
+{
+ struct nxp_nci_info *info = nci_get_drvdata(ndev);
+ int r = 0;
+
+ mutex_lock(&info->info_lock);
+
+ if (info->mode != NXP_NCI_MODE_COLD) {
+ r = -EBUSY;
+ goto open_exit;
+ }
+
+ if (info->phy_ops->set_mode)
+ r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_NCI);
+
+ info->mode = NXP_NCI_MODE_NCI;
+
+open_exit:
+ mutex_unlock(&info->info_lock);
+ return r;
+}
+
+static int nxp_nci_close(struct nci_dev *ndev)
+{
+ struct nxp_nci_info *info = nci_get_drvdata(ndev);
+ int r = 0;
+
+ mutex_lock(&info->info_lock);
+
+ if (info->phy_ops->set_mode)
+ r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
+
+ info->mode = NXP_NCI_MODE_COLD;
+
+ mutex_unlock(&info->info_lock);
+ return r;
+}
+
+static int nxp_nci_send(struct nci_dev *ndev, struct sk_buff *skb)
+{
+ struct nxp_nci_info *info = nci_get_drvdata(ndev);
+ int r;
+
+ if (!info->phy_ops->write) {
+ r = -ENOTSUPP;
+ goto send_exit;
+ }
+
+ if (info->mode != NXP_NCI_MODE_NCI) {
+ r = -EINVAL;
+ goto send_exit;
+ }
+
+ r = info->phy_ops->write(info->phy_id, skb);
+ if (r < 0)
+ kfree_skb(skb);
+
+send_exit:
+ return r;
+}
+
+static struct nci_ops nxp_nci_ops = {
+ .open = nxp_nci_open,
+ .close = nxp_nci_close,
+ .send = nxp_nci_send,
+ .fw_download = nxp_nci_fw_download,
+};
+
+int nxp_nci_probe(void *phy_id, struct device *pdev,
+ struct nxp_nci_phy_ops *phy_ops, unsigned int max_payload,
+ struct nci_dev **ndev)
+{
+ struct nxp_nci_info *info;
+ int r;
+
+ info = devm_kzalloc(pdev, sizeof(struct nxp_nci_info), GFP_KERNEL);
+ if (!info) {
+ r = -ENOMEM;
+ goto probe_exit;
+ }
+
+ info->phy_id = phy_id;
+ info->pdev = pdev;
+ info->phy_ops = phy_ops;
+ info->max_payload = max_payload;
+ INIT_WORK(&info->fw_info.work, nxp_nci_fw_work);
+ init_completion(&info->fw_info.cmd_completion);
+ mutex_init(&info->info_lock);
+
+ if (info->phy_ops->set_mode) {
+ r = info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
+ if (r < 0)
+ goto probe_exit;
+ }
+
+ info->mode = NXP_NCI_MODE_COLD;
+
+ info->ndev = nci_allocate_device(&nxp_nci_ops, NXP_NCI_NFC_PROTOCOLS,
+ NXP_NCI_HDR_LEN, 0);
+ if (!info->ndev) {
+ r = -ENOMEM;
+ goto probe_exit;
+ }
+
+ nci_set_parent_dev(info->ndev, pdev);
+ nci_set_drvdata(info->ndev, info);
+ r = nci_register_device(info->ndev);
+ if (r < 0)
+ goto probe_exit_free_nci;
+
+ *ndev = info->ndev;
+
+ goto probe_exit;
+
+probe_exit_free_nci:
+ nci_free_device(info->ndev);
+probe_exit:
+ return r;
+}
+EXPORT_SYMBOL(nxp_nci_probe);
+
+void nxp_nci_remove(struct nci_dev *ndev)
+{
+ struct nxp_nci_info *info = nci_get_drvdata(ndev);
+
+ if (info->mode == NXP_NCI_MODE_FW)
+ nxp_nci_fw_work_complete(info, -ESHUTDOWN);
+ cancel_work_sync(&info->fw_info.work);
+
+ mutex_lock(&info->info_lock);
+
+ if (info->phy_ops->set_mode)
+ info->phy_ops->set_mode(info->phy_id, NXP_NCI_MODE_COLD);
+
+ nci_unregister_device(ndev);
+ nci_free_device(ndev);
+
+ mutex_unlock(&info->info_lock);
+}
+EXPORT_SYMBOL(nxp_nci_remove);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("NXP NCI NFC driver");
+MODULE_AUTHOR("Clément Perrochaud <clement.perrochaud@nxp.com>");
diff --git a/drivers/nfc/nxp-nci/firmware.c b/drivers/nfc/nxp-nci/firmware.c
new file mode 100644
index 000000000..ec69eccab
--- /dev/null
+++ b/drivers/nfc/nxp-nci/firmware.c
@@ -0,0 +1,325 @@
+/*
+ * 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.
+ *
+ * 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/>.
+ */
+
+#include <linux/completion.h>
+#include <linux/firmware.h>
+#include <linux/nfc.h>
+#include <linux/unaligned/access_ok.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));
+
+ memcpy(skb_put(skb, chunk_len), 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 = reject_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(
+ *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);
diff --git a/drivers/nfc/nxp-nci/i2c.c b/drivers/nfc/nxp-nci/i2c.c
new file mode 100644
index 000000000..17bd67dbe
--- /dev/null
+++ b/drivers/nfc/nxp-nci/i2c.c
@@ -0,0 +1,415 @@
+/*
+ * I2C link layer for the NXP NCI driver
+ *
+ * Copyright (C) 2014 NXP Semiconductors All rights reserved.
+ *
+ * Authors: Clément Perrochaud <clement.perrochaud@nxp.com>
+ *
+ * Derived from PN544 device driver:
+ * Copyright (C) 2012 Intel Corporation. All rights reserved.
+ *
+ * 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/>.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/nfc.h>
+#include <linux/of_gpio.h>
+#include <linux/of_irq.h>
+#include <linux/platform_data/nxp-nci.h>
+#include <linux/unaligned/access_ok.h>
+
+#include <net/nfc/nfc.h>
+
+#include "nxp-nci.h"
+
+#define NXP_NCI_I2C_DRIVER_NAME "nxp-nci_i2c"
+
+#define NXP_NCI_I2C_MAX_PAYLOAD 32
+
+struct nxp_nci_i2c_phy {
+ struct i2c_client *i2c_dev;
+ struct nci_dev *ndev;
+
+ unsigned int gpio_en;
+ unsigned int gpio_fw;
+
+ int hard_fault; /*
+ * < 0 if hardware error occurred (e.g. i2c err)
+ * and prevents normal operation.
+ */
+};
+
+static int nxp_nci_i2c_set_mode(void *phy_id,
+ enum nxp_nci_mode mode)
+{
+ struct nxp_nci_i2c_phy *phy = (struct nxp_nci_i2c_phy *) phy_id;
+
+ gpio_set_value(phy->gpio_fw, (mode == NXP_NCI_MODE_FW) ? 1 : 0);
+ gpio_set_value(phy->gpio_en, (mode != NXP_NCI_MODE_COLD) ? 1 : 0);
+ usleep_range(10000, 15000);
+
+ if (mode == NXP_NCI_MODE_COLD)
+ phy->hard_fault = 0;
+
+ return 0;
+}
+
+static int nxp_nci_i2c_write(void *phy_id, struct sk_buff *skb)
+{
+ int r;
+ struct nxp_nci_i2c_phy *phy = phy_id;
+ struct i2c_client *client = phy->i2c_dev;
+
+ if (phy->hard_fault != 0)
+ return phy->hard_fault;
+
+ r = i2c_master_send(client, skb->data, skb->len);
+ if (r == -EREMOTEIO) {
+ /* Retry, chip was in standby */
+ usleep_range(110000, 120000);
+ r = i2c_master_send(client, skb->data, skb->len);
+ }
+
+ if (r < 0) {
+ nfc_err(&client->dev, "Error %d on I2C send\n", r);
+ } else if (r != skb->len) {
+ nfc_err(&client->dev,
+ "Invalid length sent: %u (expected %u)\n",
+ r, skb->len);
+ r = -EREMOTEIO;
+ } else {
+ /* Success but return 0 and not number of bytes */
+ r = 0;
+ }
+
+ return r;
+}
+
+static struct nxp_nci_phy_ops i2c_phy_ops = {
+ .set_mode = nxp_nci_i2c_set_mode,
+ .write = nxp_nci_i2c_write,
+};
+
+static int nxp_nci_i2c_fw_read(struct nxp_nci_i2c_phy *phy,
+ struct sk_buff **skb)
+{
+ struct i2c_client *client = phy->i2c_dev;
+ u16 header;
+ size_t frame_len;
+ int r;
+
+ r = i2c_master_recv(client, (u8 *) &header, NXP_NCI_FW_HDR_LEN);
+ if (r < 0) {
+ goto fw_read_exit;
+ } else if (r != NXP_NCI_FW_HDR_LEN) {
+ nfc_err(&client->dev, "Incorrect header length: %u\n", r);
+ r = -EBADMSG;
+ goto fw_read_exit;
+ }
+
+ frame_len = (get_unaligned_be16(&header) & NXP_NCI_FW_FRAME_LEN_MASK) +
+ NXP_NCI_FW_CRC_LEN;
+
+ *skb = alloc_skb(NXP_NCI_FW_HDR_LEN + frame_len, GFP_KERNEL);
+ if (*skb == NULL) {
+ r = -ENOMEM;
+ goto fw_read_exit;
+ }
+
+ memcpy(skb_put(*skb, NXP_NCI_FW_HDR_LEN), &header, NXP_NCI_FW_HDR_LEN);
+
+ r = i2c_master_recv(client, skb_put(*skb, frame_len), frame_len);
+ if (r != frame_len) {
+ nfc_err(&client->dev,
+ "Invalid frame length: %u (expected %zu)\n",
+ r, frame_len);
+ r = -EBADMSG;
+ goto fw_read_exit_free_skb;
+ }
+
+ return 0;
+
+fw_read_exit_free_skb:
+ kfree_skb(*skb);
+fw_read_exit:
+ return r;
+}
+
+static int nxp_nci_i2c_nci_read(struct nxp_nci_i2c_phy *phy,
+ struct sk_buff **skb)
+{
+ struct nci_ctrl_hdr header; /* May actually be a data header */
+ struct i2c_client *client = phy->i2c_dev;
+ int r;
+
+ r = i2c_master_recv(client, (u8 *) &header, NCI_CTRL_HDR_SIZE);
+ if (r < 0) {
+ goto nci_read_exit;
+ } else if (r != NCI_CTRL_HDR_SIZE) {
+ nfc_err(&client->dev, "Incorrect header length: %u\n", r);
+ r = -EBADMSG;
+ goto nci_read_exit;
+ }
+
+ *skb = alloc_skb(NCI_CTRL_HDR_SIZE + header.plen, GFP_KERNEL);
+ if (*skb == NULL) {
+ r = -ENOMEM;
+ goto nci_read_exit;
+ }
+
+ memcpy(skb_put(*skb, NCI_CTRL_HDR_SIZE), (void *) &header,
+ NCI_CTRL_HDR_SIZE);
+
+ r = i2c_master_recv(client, skb_put(*skb, header.plen), header.plen);
+ if (r != header.plen) {
+ nfc_err(&client->dev,
+ "Invalid frame payload length: %u (expected %u)\n",
+ r, header.plen);
+ r = -EBADMSG;
+ goto nci_read_exit_free_skb;
+ }
+
+ return 0;
+
+nci_read_exit_free_skb:
+ kfree_skb(*skb);
+nci_read_exit:
+ return r;
+}
+
+static irqreturn_t nxp_nci_i2c_irq_thread_fn(int irq, void *phy_id)
+{
+ struct nxp_nci_i2c_phy *phy = phy_id;
+ struct i2c_client *client;
+ struct nxp_nci_info *info;
+
+ struct sk_buff *skb = NULL;
+ int r = 0;
+
+ if (!phy || !phy->ndev)
+ goto exit_irq_none;
+
+ client = phy->i2c_dev;
+
+ if (!client || irq != client->irq)
+ goto exit_irq_none;
+
+ info = nci_get_drvdata(phy->ndev);
+
+ if (!info)
+ goto exit_irq_none;
+
+ mutex_lock(&info->info_lock);
+
+ if (phy->hard_fault != 0)
+ goto exit_irq_handled;
+
+ switch (info->mode) {
+ case NXP_NCI_MODE_NCI:
+ r = nxp_nci_i2c_nci_read(phy, &skb);
+ break;
+ case NXP_NCI_MODE_FW:
+ r = nxp_nci_i2c_fw_read(phy, &skb);
+ break;
+ case NXP_NCI_MODE_COLD:
+ r = -EREMOTEIO;
+ break;
+ }
+
+ if (r == -EREMOTEIO) {
+ phy->hard_fault = r;
+ skb = NULL;
+ } else if (r < 0) {
+ nfc_err(&client->dev, "Read failed with error %d\n", r);
+ goto exit_irq_handled;
+ }
+
+ switch (info->mode) {
+ case NXP_NCI_MODE_NCI:
+ nci_recv_frame(phy->ndev, skb);
+ break;
+ case NXP_NCI_MODE_FW:
+ nxp_nci_fw_recv_frame(phy->ndev, skb);
+ break;
+ case NXP_NCI_MODE_COLD:
+ break;
+ }
+
+exit_irq_handled:
+ mutex_unlock(&info->info_lock);
+ return IRQ_HANDLED;
+exit_irq_none:
+ WARN_ON_ONCE(1);
+ return IRQ_NONE;
+}
+
+#ifdef CONFIG_OF
+
+static int nxp_nci_i2c_parse_devtree(struct i2c_client *client)
+{
+ struct nxp_nci_i2c_phy *phy = i2c_get_clientdata(client);
+ struct device_node *pp;
+ int r;
+
+ pp = client->dev.of_node;
+ if (!pp)
+ return -ENODEV;
+
+ r = of_get_named_gpio(pp, "enable-gpios", 0);
+ if (r == -EPROBE_DEFER)
+ r = of_get_named_gpio(pp, "enable-gpios", 0);
+ if (r < 0) {
+ nfc_err(&client->dev, "Failed to get EN gpio, error: %d\n", r);
+ return r;
+ }
+ phy->gpio_en = r;
+
+ r = of_get_named_gpio(pp, "firmware-gpios", 0);
+ if (r == -EPROBE_DEFER)
+ r = of_get_named_gpio(pp, "firmware-gpios", 0);
+ if (r < 0) {
+ nfc_err(&client->dev, "Failed to get FW gpio, error: %d\n", r);
+ return r;
+ }
+ phy->gpio_fw = r;
+
+ r = irq_of_parse_and_map(pp, 0);
+ if (r < 0) {
+ nfc_err(&client->dev, "Unable to get irq, error: %d\n", r);
+ return r;
+ }
+ client->irq = r;
+
+ return 0;
+}
+
+#else
+
+static int nxp_nci_i2c_parse_devtree(struct i2c_client *client)
+{
+ return -ENODEV;
+}
+
+#endif
+
+static int nxp_nci_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct nxp_nci_i2c_phy *phy;
+ struct nxp_nci_nfc_platform_data *pdata;
+ int r;
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ nfc_err(&client->dev, "Need I2C_FUNC_I2C\n");
+ r = -ENODEV;
+ goto probe_exit;
+ }
+
+ phy = devm_kzalloc(&client->dev, sizeof(struct nxp_nci_i2c_phy),
+ GFP_KERNEL);
+ if (!phy) {
+ r = -ENOMEM;
+ goto probe_exit;
+ }
+
+ phy->i2c_dev = client;
+ i2c_set_clientdata(client, phy);
+
+ pdata = client->dev.platform_data;
+
+ if (!pdata && client->dev.of_node) {
+ r = nxp_nci_i2c_parse_devtree(client);
+ if (r < 0) {
+ nfc_err(&client->dev, "Failed to get DT data\n");
+ goto probe_exit;
+ }
+ } else if (pdata) {
+ phy->gpio_en = pdata->gpio_en;
+ phy->gpio_fw = pdata->gpio_fw;
+ client->irq = pdata->irq;
+ } else {
+ nfc_err(&client->dev, "No platform data\n");
+ r = -EINVAL;
+ goto probe_exit;
+ }
+
+ r = devm_gpio_request_one(&phy->i2c_dev->dev, phy->gpio_en,
+ GPIOF_OUT_INIT_LOW, "nxp_nci_en");
+ if (r < 0)
+ goto probe_exit;
+
+ r = devm_gpio_request_one(&phy->i2c_dev->dev, phy->gpio_fw,
+ GPIOF_OUT_INIT_LOW, "nxp_nci_fw");
+ if (r < 0)
+ goto probe_exit;
+
+ r = nxp_nci_probe(phy, &client->dev, &i2c_phy_ops,
+ NXP_NCI_I2C_MAX_PAYLOAD, &phy->ndev);
+ if (r < 0)
+ goto probe_exit;
+
+ r = request_threaded_irq(client->irq, NULL,
+ nxp_nci_i2c_irq_thread_fn,
+ IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+ NXP_NCI_I2C_DRIVER_NAME, phy);
+ if (r < 0)
+ nfc_err(&client->dev, "Unable to register IRQ handler\n");
+
+probe_exit:
+ return r;
+}
+
+static int nxp_nci_i2c_remove(struct i2c_client *client)
+{
+ struct nxp_nci_i2c_phy *phy = i2c_get_clientdata(client);
+
+ nxp_nci_remove(phy->ndev);
+ free_irq(client->irq, phy);
+
+ return 0;
+}
+
+static struct i2c_device_id nxp_nci_i2c_id_table[] = {
+ {"nxp-nci_i2c", 0},
+ {}
+};
+MODULE_DEVICE_TABLE(i2c, nxp_nci_i2c_id_table);
+
+static const struct of_device_id of_nxp_nci_i2c_match[] = {
+ { .compatible = "nxp,nxp-nci-i2c", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_nxp_nci_i2c_match);
+
+static struct i2c_driver nxp_nci_i2c_driver = {
+ .driver = {
+ .name = NXP_NCI_I2C_DRIVER_NAME,
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(of_nxp_nci_i2c_match),
+ },
+ .probe = nxp_nci_i2c_probe,
+ .id_table = nxp_nci_i2c_id_table,
+ .remove = nxp_nci_i2c_remove,
+};
+
+module_i2c_driver(nxp_nci_i2c_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("I2C driver for NXP NCI NFC controllers");
+MODULE_AUTHOR("Clément Perrochaud <clement.perrochaud@nxp.com>");
diff --git a/drivers/nfc/nxp-nci/nxp-nci.h b/drivers/nfc/nxp-nci/nxp-nci.h
new file mode 100644
index 000000000..f1fecc4e2
--- /dev/null
+++ b/drivers/nfc/nxp-nci/nxp-nci.h
@@ -0,0 +1,89 @@
+/*
+ * Copyright (C) 2014 NXP Semiconductors All rights reserved.
+ *
+ * Authors: Clément Perrochaud <clement.perrochaud@nxp.com>
+ *
+ * Derived from PN544 device driver:
+ * Copyright (C) 2012 Intel Corporation. All rights reserved.
+ *
+ * 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/>.
+*/
+
+#ifndef __LOCAL_NXP_NCI_H_
+#define __LOCAL_NXP_NCI_H_
+
+#include <linux/completion.h>
+#include <linux/firmware.h>
+#include <linux/nfc.h>
+#include <linux/platform_data/nxp-nci.h>
+
+#include <net/nfc/nci_core.h>
+
+#define NXP_NCI_FW_HDR_LEN 2
+#define NXP_NCI_FW_CRC_LEN 2
+
+#define NXP_NCI_FW_FRAME_LEN_MASK 0x03FF
+
+enum nxp_nci_mode {
+ NXP_NCI_MODE_COLD,
+ NXP_NCI_MODE_NCI,
+ NXP_NCI_MODE_FW
+};
+
+struct nxp_nci_phy_ops {
+ int (*set_mode)(void *id, enum nxp_nci_mode mode);
+ int (*write)(void *id, struct sk_buff *skb);
+};
+
+struct nxp_nci_fw_info {
+ char name[NFC_FIRMWARE_NAME_MAXSIZE + 1];
+ const struct firmware *fw;
+
+ size_t size;
+ size_t written;
+
+ const u8 *data;
+ size_t frame_size;
+
+ struct work_struct work;
+ struct completion cmd_completion;
+
+ int cmd_result;
+};
+
+struct nxp_nci_info {
+ struct nci_dev *ndev;
+ void *phy_id;
+ struct device *pdev;
+
+ enum nxp_nci_mode mode;
+
+ struct nxp_nci_phy_ops *phy_ops;
+ unsigned int max_payload;
+
+ struct mutex info_lock;
+
+ struct nxp_nci_fw_info fw_info;
+};
+
+int nxp_nci_fw_download(struct nci_dev *ndev, const char *firmware_name);
+void nxp_nci_fw_work(struct work_struct *work);
+void nxp_nci_fw_recv_frame(struct nci_dev *ndev, struct sk_buff *skb);
+void nxp_nci_fw_work_complete(struct nxp_nci_info *info, int result);
+
+int nxp_nci_probe(void *phy_id, struct device *pdev,
+ struct nxp_nci_phy_ops *phy_ops, unsigned int max_payload,
+ struct nci_dev **ndev);
+void nxp_nci_remove(struct nci_dev *ndev);
+
+#endif /* __LOCAL_NXP_NCI_H_ */
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-09 21:40:25 +0000