[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/drivers/nfc/Kconfig b/ap/os/linux/linux-3.4.x/drivers/nfc/Kconfig
new file mode 100644
index 0000000..5af9592
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/nfc/Kconfig
@@ -0,0 +1,41 @@
+#
+# Near Field Communication (NFC) devices
+#
+
+menu "Near Field Communication (NFC) devices"
+ depends on NFC
+
+config PN544_NFC
+ tristate "PN544 NFC driver"
+ depends on I2C
+ select CRC_CCITT
+ default n
+ ---help---
+ Say yes if you want PN544 Near Field Communication driver.
+ This is for i2c connected version. If unsure, say N here.
+
+ To compile this driver as a module, choose m here. The module will
+ be called pn544.
+
+config NFC_PN533
+ tristate "NXP PN533 USB driver"
+ depends on USB
+ help
+ NXP PN533 USB driver.
+ This driver provides support for NFC NXP PN533 devices.
+
+ Say Y here to compile support for PN533 devices into the
+ kernel or say M to compile it as module (pn533).
+
+config NFC_WILINK
+ tristate "Texas Instruments NFC WiLink driver"
+ depends on TI_ST && NFC_NCI
+ help
+ This enables the NFC driver for Texas Instrument's BT/FM/GPS/NFC
+ combo devices. This makes use of shared transport line discipline
+ core driver to communicate with the NFC core of the combo chip.
+
+ Say Y here to compile support for Texas Instrument's NFC WiLink driver
+ into the kernel or say M to compile it as module.
+
+endmenu
diff --git a/ap/os/linux/linux-3.4.x/drivers/nfc/Makefile b/ap/os/linux/linux-3.4.x/drivers/nfc/Makefile
new file mode 100644
index 0000000..ab99e85
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/nfc/Makefile
@@ -0,0 +1,9 @@
+#
+# Makefile for nfc devices
+#
+
+obj-$(CONFIG_PN544_NFC) += pn544.o
+obj-$(CONFIG_NFC_PN533) += pn533.o
+obj-$(CONFIG_NFC_WILINK) += nfcwilink.o
+
+ccflags-$(CONFIG_NFC_DEBUG) := -DDEBUG
diff --git a/ap/os/linux/linux-3.4.x/drivers/nfc/nfcwilink.c b/ap/os/linux/linux-3.4.x/drivers/nfc/nfcwilink.c
new file mode 100644
index 0000000..1f74a77
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/nfc/nfcwilink.c
@@ -0,0 +1,626 @@
+/*
+ * Texas Instrument's NFC Driver For Shared Transport.
+ *
+ * NFC Driver acts as interface between NCI core and
+ * TI Shared Transport Layer.
+ *
+ * Copyright (C) 2011 Texas Instruments, Inc.
+ *
+ * Written by Ilan Elias <ilane@ti.com>
+ *
+ * Acknowledgements:
+ * This file is based on btwilink.c, which was written
+ * by Raja Mani and Pavan Savoy.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+#include <linux/platform_device.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/firmware.h>
+#include <linux/nfc.h>
+#include <net/nfc/nci.h>
+#include <net/nfc/nci_core.h>
+#include <linux/ti_wilink_st.h>
+
+#define NFCWILINK_CHNL 12
+#define NFCWILINK_OPCODE 7
+#define NFCWILINK_MAX_FRAME_SIZE 300
+#define NFCWILINK_HDR_LEN 4
+#define NFCWILINK_OFFSET_LEN_IN_HDR 1
+#define NFCWILINK_LEN_SIZE 2
+#define NFCWILINK_REGISTER_TIMEOUT 8000 /* 8 sec */
+#define NFCWILINK_CMD_TIMEOUT 5000 /* 5 sec */
+
+#define BTS_FILE_NAME_MAX_SIZE 40
+#define BTS_FILE_HDR_MAGIC 0x42535442
+#define BTS_FILE_CMD_MAX_LEN 0xff
+#define BTS_FILE_ACTION_TYPE_SEND_CMD 1
+
+#define NCI_VS_NFCC_INFO_CMD_GID 0x2f
+#define NCI_VS_NFCC_INFO_CMD_OID 0x12
+#define NCI_VS_NFCC_INFO_RSP_GID 0x4f
+#define NCI_VS_NFCC_INFO_RSP_OID 0x12
+
+struct nfcwilink_hdr {
+ __u8 chnl;
+ __u8 opcode;
+ __le16 len;
+} __packed;
+
+struct nci_vs_nfcc_info_cmd {
+ __u8 gid;
+ __u8 oid;
+ __u8 plen;
+} __packed;
+
+struct nci_vs_nfcc_info_rsp {
+ __u8 gid;
+ __u8 oid;
+ __u8 plen;
+ __u8 status;
+ __u8 hw_id;
+ __u8 sw_ver_x;
+ __u8 sw_ver_z;
+ __u8 patch_id;
+} __packed;
+
+struct bts_file_hdr {
+ __le32 magic;
+ __le32 ver;
+ __u8 rfu[24];
+ __u8 actions[0];
+} __packed;
+
+struct bts_file_action {
+ __le16 type;
+ __le16 len;
+ __u8 data[0];
+} __packed;
+
+struct nfcwilink {
+ struct platform_device *pdev;
+ struct nci_dev *ndev;
+ unsigned long flags;
+
+ char st_register_cb_status;
+ long (*st_write) (struct sk_buff *);
+
+ struct completion completed;
+
+ struct nci_vs_nfcc_info_rsp nfcc_info;
+};
+
+/* NFCWILINK driver flags */
+enum {
+ NFCWILINK_RUNNING,
+ NFCWILINK_FW_DOWNLOAD,
+};
+
+static int nfcwilink_send(struct sk_buff *skb);
+
+static inline struct sk_buff *nfcwilink_skb_alloc(unsigned int len, gfp_t how)
+{
+ struct sk_buff *skb;
+
+ skb = alloc_skb(len + NFCWILINK_HDR_LEN, how);
+ if (skb)
+ skb_reserve(skb, NFCWILINK_HDR_LEN);
+
+ return skb;
+}
+
+static void nfcwilink_fw_download_receive(struct nfcwilink *drv,
+ struct sk_buff *skb)
+{
+ struct nci_vs_nfcc_info_rsp *rsp = (void *)skb->data;
+
+ /* Detect NCI_VS_NFCC_INFO_RSP and store the result */
+ if ((skb->len > 3) && (rsp->gid == NCI_VS_NFCC_INFO_RSP_GID) &&
+ (rsp->oid == NCI_VS_NFCC_INFO_RSP_OID)) {
+ memcpy(&drv->nfcc_info, rsp,
+ sizeof(struct nci_vs_nfcc_info_rsp));
+ }
+
+ kfree_skb(skb);
+
+ complete(&drv->completed);
+}
+
+static int nfcwilink_get_bts_file_name(struct nfcwilink *drv, char *file_name)
+{
+ struct nci_vs_nfcc_info_cmd *cmd;
+ struct sk_buff *skb;
+ unsigned long comp_ret;
+ int rc;
+
+ nfc_dev_dbg(&drv->pdev->dev, "get_bts_file_name entry");
+
+ skb = nfcwilink_skb_alloc(sizeof(struct nci_vs_nfcc_info_cmd),
+ GFP_KERNEL);
+ if (!skb) {
+ nfc_dev_err(&drv->pdev->dev,
+ "no memory for nci_vs_nfcc_info_cmd");
+ return -ENOMEM;
+ }
+
+ skb->dev = (void *)drv->ndev;
+
+ cmd = (struct nci_vs_nfcc_info_cmd *)
+ skb_put(skb, sizeof(struct nci_vs_nfcc_info_cmd));
+ cmd->gid = NCI_VS_NFCC_INFO_CMD_GID;
+ cmd->oid = NCI_VS_NFCC_INFO_CMD_OID;
+ cmd->plen = 0;
+
+ drv->nfcc_info.plen = 0;
+
+ rc = nfcwilink_send(skb);
+ if (rc)
+ return rc;
+
+ comp_ret = wait_for_completion_timeout(&drv->completed,
+ msecs_to_jiffies(NFCWILINK_CMD_TIMEOUT));
+ nfc_dev_dbg(&drv->pdev->dev, "wait_for_completion_timeout returned %ld",
+ comp_ret);
+ if (comp_ret == 0) {
+ nfc_dev_err(&drv->pdev->dev,
+ "timeout on wait_for_completion_timeout");
+ return -ETIMEDOUT;
+ }
+
+ nfc_dev_dbg(&drv->pdev->dev, "nci_vs_nfcc_info_rsp: plen %d, status %d",
+ drv->nfcc_info.plen,
+ drv->nfcc_info.status);
+
+ if ((drv->nfcc_info.plen != 5) || (drv->nfcc_info.status != 0)) {
+ nfc_dev_err(&drv->pdev->dev,
+ "invalid nci_vs_nfcc_info_rsp");
+ return -EINVAL;
+ }
+
+ snprintf(file_name, BTS_FILE_NAME_MAX_SIZE,
+ "TINfcInit_%d.%d.%d.%d.bts",
+ drv->nfcc_info.hw_id,
+ drv->nfcc_info.sw_ver_x,
+ drv->nfcc_info.sw_ver_z,
+ drv->nfcc_info.patch_id);
+
+ nfc_dev_info(&drv->pdev->dev, "nfcwilink FW file name: %s", file_name);
+
+ return 0;
+}
+
+static int nfcwilink_send_bts_cmd(struct nfcwilink *drv, __u8 *data, int len)
+{
+ struct nfcwilink_hdr *hdr = (struct nfcwilink_hdr *)data;
+ struct sk_buff *skb;
+ unsigned long comp_ret;
+ int rc;
+
+ nfc_dev_dbg(&drv->pdev->dev, "send_bts_cmd entry");
+
+ /* verify valid cmd for the NFC channel */
+ if ((len <= sizeof(struct nfcwilink_hdr)) ||
+ (len > BTS_FILE_CMD_MAX_LEN) ||
+ (hdr->chnl != NFCWILINK_CHNL) ||
+ (hdr->opcode != NFCWILINK_OPCODE)) {
+ nfc_dev_err(&drv->pdev->dev,
+ "ignoring invalid bts cmd, len %d, chnl %d, opcode %d",
+ len, hdr->chnl, hdr->opcode);
+ return 0;
+ }
+
+ /* remove the ST header */
+ len -= sizeof(struct nfcwilink_hdr);
+ data += sizeof(struct nfcwilink_hdr);
+
+ skb = nfcwilink_skb_alloc(len, GFP_KERNEL);
+ if (!skb) {
+ nfc_dev_err(&drv->pdev->dev, "no memory for bts cmd");
+ return -ENOMEM;
+ }
+
+ skb->dev = (void *)drv->ndev;
+
+ memcpy(skb_put(skb, len), data, len);
+
+ rc = nfcwilink_send(skb);
+ if (rc)
+ return rc;
+
+ comp_ret = wait_for_completion_timeout(&drv->completed,
+ msecs_to_jiffies(NFCWILINK_CMD_TIMEOUT));
+ nfc_dev_dbg(&drv->pdev->dev, "wait_for_completion_timeout returned %ld",
+ comp_ret);
+ if (comp_ret == 0) {
+ nfc_dev_err(&drv->pdev->dev,
+ "timeout on wait_for_completion_timeout");
+ return -ETIMEDOUT;
+ }
+
+ return 0;
+}
+
+static int nfcwilink_download_fw(struct nfcwilink *drv)
+{
+ unsigned char file_name[BTS_FILE_NAME_MAX_SIZE];
+ const struct firmware *fw;
+ __u16 action_type, action_len;
+ __u8 *ptr;
+ int len, rc;
+
+ nfc_dev_dbg(&drv->pdev->dev, "download_fw entry");
+
+ set_bit(NFCWILINK_FW_DOWNLOAD, &drv->flags);
+
+ rc = nfcwilink_get_bts_file_name(drv, file_name);
+ if (rc)
+ goto exit;
+
+ rc = request_firmware(&fw, file_name, &drv->pdev->dev);
+ if (rc) {
+ nfc_dev_err(&drv->pdev->dev, "request_firmware failed %d", rc);
+
+ /* if the file is not found, don't exit with failure */
+ if (rc == -ENOENT)
+ rc = 0;
+
+ goto exit;
+ }
+
+ len = fw->size;
+ ptr = (__u8 *)fw->data;
+
+ if ((len == 0) || (ptr == NULL)) {
+ nfc_dev_dbg(&drv->pdev->dev,
+ "request_firmware returned size %d", len);
+ goto release_fw;
+ }
+
+ if (__le32_to_cpu(((struct bts_file_hdr *)ptr)->magic) !=
+ BTS_FILE_HDR_MAGIC) {
+ nfc_dev_err(&drv->pdev->dev, "wrong bts magic number");
+ rc = -EINVAL;
+ goto release_fw;
+ }
+
+ /* remove the BTS header */
+ len -= sizeof(struct bts_file_hdr);
+ ptr += sizeof(struct bts_file_hdr);
+
+ while (len > 0) {
+ action_type =
+ __le16_to_cpu(((struct bts_file_action *)ptr)->type);
+ action_len =
+ __le16_to_cpu(((struct bts_file_action *)ptr)->len);
+
+ nfc_dev_dbg(&drv->pdev->dev, "bts_file_action type %d, len %d",
+ action_type, action_len);
+
+ switch (action_type) {
+ case BTS_FILE_ACTION_TYPE_SEND_CMD:
+ rc = nfcwilink_send_bts_cmd(drv,
+ ((struct bts_file_action *)ptr)->data,
+ action_len);
+ if (rc)
+ goto release_fw;
+ break;
+ }
+
+ /* advance to the next action */
+ len -= (sizeof(struct bts_file_action) + action_len);
+ ptr += (sizeof(struct bts_file_action) + action_len);
+ }
+
+release_fw:
+ release_firmware(fw);
+
+exit:
+ clear_bit(NFCWILINK_FW_DOWNLOAD, &drv->flags);
+ return rc;
+}
+
+/* Called by ST when registration is complete */
+static void nfcwilink_register_complete(void *priv_data, char data)
+{
+ struct nfcwilink *drv = priv_data;
+
+ nfc_dev_dbg(&drv->pdev->dev, "register_complete entry");
+
+ /* store ST registration status */
+ drv->st_register_cb_status = data;
+
+ /* complete the wait in nfc_st_open() */
+ complete(&drv->completed);
+}
+
+/* Called by ST when receive data is available */
+static long nfcwilink_receive(void *priv_data, struct sk_buff *skb)
+{
+ struct nfcwilink *drv = priv_data;
+ int rc;
+
+ nfc_dev_dbg(&drv->pdev->dev, "receive entry, len %d", skb->len);
+
+ if (!skb)
+ return -EFAULT;
+
+ if (!drv) {
+ kfree_skb(skb);
+ return -EFAULT;
+ }
+
+ /* strip the ST header
+ (apart for the chnl byte, which is not received in the hdr) */
+ skb_pull(skb, (NFCWILINK_HDR_LEN-1));
+
+ if (test_bit(NFCWILINK_FW_DOWNLOAD, &drv->flags)) {
+ nfcwilink_fw_download_receive(drv, skb);
+ return 0;
+ }
+
+ skb->dev = (void *) drv->ndev;
+
+ /* Forward skb to NCI core layer */
+ rc = nci_recv_frame(skb);
+ if (rc < 0) {
+ nfc_dev_err(&drv->pdev->dev, "nci_recv_frame failed %d", rc);
+ return rc;
+ }
+
+ return 0;
+}
+
+/* protocol structure registered with ST */
+static struct st_proto_s nfcwilink_proto = {
+ .chnl_id = NFCWILINK_CHNL,
+ .max_frame_size = NFCWILINK_MAX_FRAME_SIZE,
+ .hdr_len = (NFCWILINK_HDR_LEN-1), /* not including chnl byte */
+ .offset_len_in_hdr = NFCWILINK_OFFSET_LEN_IN_HDR,
+ .len_size = NFCWILINK_LEN_SIZE,
+ .reserve = 0,
+ .recv = nfcwilink_receive,
+ .reg_complete_cb = nfcwilink_register_complete,
+ .write = NULL,
+};
+
+static int nfcwilink_open(struct nci_dev *ndev)
+{
+ struct nfcwilink *drv = nci_get_drvdata(ndev);
+ unsigned long comp_ret;
+ int rc;
+
+ nfc_dev_dbg(&drv->pdev->dev, "open entry");
+
+ if (test_and_set_bit(NFCWILINK_RUNNING, &drv->flags)) {
+ rc = -EBUSY;
+ goto exit;
+ }
+
+ nfcwilink_proto.priv_data = drv;
+
+ init_completion(&drv->completed);
+ drv->st_register_cb_status = -EINPROGRESS;
+
+ rc = st_register(&nfcwilink_proto);
+ if (rc < 0) {
+ if (rc == -EINPROGRESS) {
+ comp_ret = wait_for_completion_timeout(
+ &drv->completed,
+ msecs_to_jiffies(NFCWILINK_REGISTER_TIMEOUT));
+
+ nfc_dev_dbg(&drv->pdev->dev,
+ "wait_for_completion_timeout returned %ld",
+ comp_ret);
+
+ if (comp_ret == 0) {
+ /* timeout */
+ rc = -ETIMEDOUT;
+ goto clear_exit;
+ } else if (drv->st_register_cb_status != 0) {
+ rc = drv->st_register_cb_status;
+ nfc_dev_err(&drv->pdev->dev,
+ "st_register_cb failed %d", rc);
+ goto clear_exit;
+ }
+ } else {
+ nfc_dev_err(&drv->pdev->dev,
+ "st_register failed %d", rc);
+ goto clear_exit;
+ }
+ }
+
+ /* st_register MUST fill the write callback */
+ BUG_ON(nfcwilink_proto.write == NULL);
+ drv->st_write = nfcwilink_proto.write;
+
+ if (nfcwilink_download_fw(drv)) {
+ nfc_dev_err(&drv->pdev->dev, "nfcwilink_download_fw failed %d",
+ rc);
+ /* open should succeed, even if the FW download failed */
+ }
+
+ goto exit;
+
+clear_exit:
+ clear_bit(NFCWILINK_RUNNING, &drv->flags);
+
+exit:
+ return rc;
+}
+
+static int nfcwilink_close(struct nci_dev *ndev)
+{
+ struct nfcwilink *drv = nci_get_drvdata(ndev);
+ int rc;
+
+ nfc_dev_dbg(&drv->pdev->dev, "close entry");
+
+ if (!test_and_clear_bit(NFCWILINK_RUNNING, &drv->flags))
+ return 0;
+
+ rc = st_unregister(&nfcwilink_proto);
+ if (rc)
+ nfc_dev_err(&drv->pdev->dev, "st_unregister failed %d", rc);
+
+ drv->st_write = NULL;
+
+ return rc;
+}
+
+static int nfcwilink_send(struct sk_buff *skb)
+{
+ struct nci_dev *ndev = (struct nci_dev *)skb->dev;
+ struct nfcwilink *drv = nci_get_drvdata(ndev);
+ struct nfcwilink_hdr hdr = {NFCWILINK_CHNL, NFCWILINK_OPCODE, 0x0000};
+ long len;
+
+ nfc_dev_dbg(&drv->pdev->dev, "send entry, len %d", skb->len);
+
+ if (!test_bit(NFCWILINK_RUNNING, &drv->flags)) {
+ kfree_skb(skb);
+ return -EINVAL;
+ }
+
+ /* add the ST hdr to the start of the buffer */
+ hdr.len = cpu_to_le16(skb->len);
+ memcpy(skb_push(skb, NFCWILINK_HDR_LEN), &hdr, NFCWILINK_HDR_LEN);
+
+ /* Insert skb to shared transport layer's transmit queue.
+ * Freeing skb memory is taken care in shared transport layer,
+ * so don't free skb memory here.
+ */
+ len = drv->st_write(skb);
+ if (len < 0) {
+ kfree_skb(skb);
+ nfc_dev_err(&drv->pdev->dev, "st_write failed %ld", len);
+ return -EFAULT;
+ }
+
+ return 0;
+}
+
+static struct nci_ops nfcwilink_ops = {
+ .open = nfcwilink_open,
+ .close = nfcwilink_close,
+ .send = nfcwilink_send,
+};
+
+static int nfcwilink_probe(struct platform_device *pdev)
+{
+ static struct nfcwilink *drv;
+ int rc;
+ __u32 protocols;
+
+ nfc_dev_dbg(&pdev->dev, "probe entry");
+
+ drv = kzalloc(sizeof(struct nfcwilink), GFP_KERNEL);
+ if (!drv) {
+ rc = -ENOMEM;
+ goto exit;
+ }
+
+ drv->pdev = pdev;
+
+ protocols = NFC_PROTO_JEWEL_MASK
+ | NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK
+ | NFC_PROTO_ISO14443_MASK
+ | NFC_PROTO_NFC_DEP_MASK;
+
+ drv->ndev = nci_allocate_device(&nfcwilink_ops,
+ protocols,
+ NFCWILINK_HDR_LEN,
+ 0);
+ if (!drv->ndev) {
+ nfc_dev_err(&pdev->dev, "nci_allocate_device failed");
+ rc = -ENOMEM;
+ goto free_exit;
+ }
+
+ nci_set_parent_dev(drv->ndev, &pdev->dev);
+ nci_set_drvdata(drv->ndev, drv);
+
+ rc = nci_register_device(drv->ndev);
+ if (rc < 0) {
+ nfc_dev_err(&pdev->dev, "nci_register_device failed %d", rc);
+ goto free_dev_exit;
+ }
+
+ dev_set_drvdata(&pdev->dev, drv);
+
+ goto exit;
+
+free_dev_exit:
+ nci_free_device(drv->ndev);
+
+free_exit:
+ kfree(drv);
+
+exit:
+ return rc;
+}
+
+static int nfcwilink_remove(struct platform_device *pdev)
+{
+ struct nfcwilink *drv = dev_get_drvdata(&pdev->dev);
+ struct nci_dev *ndev;
+
+ nfc_dev_dbg(&pdev->dev, "remove entry");
+
+ if (!drv)
+ return -EFAULT;
+
+ ndev = drv->ndev;
+
+ nci_unregister_device(ndev);
+ nci_free_device(ndev);
+
+ kfree(drv);
+
+ dev_set_drvdata(&pdev->dev, NULL);
+
+ return 0;
+}
+
+static struct platform_driver nfcwilink_driver = {
+ .probe = nfcwilink_probe,
+ .remove = nfcwilink_remove,
+ .driver = {
+ .name = "nfcwilink",
+ .owner = THIS_MODULE,
+ },
+};
+
+/* ------- Module Init/Exit interfaces ------ */
+static int __init nfcwilink_init(void)
+{
+ printk(KERN_INFO "NFC Driver for TI WiLink");
+
+ return platform_driver_register(&nfcwilink_driver);
+}
+
+static void __exit nfcwilink_exit(void)
+{
+ platform_driver_unregister(&nfcwilink_driver);
+}
+
+module_init(nfcwilink_init);
+module_exit(nfcwilink_exit);
+
+/* ------ Module Info ------ */
+
+MODULE_AUTHOR("Ilan Elias <ilane@ti.com>");
+MODULE_DESCRIPTION("NFC Driver for TI Shared Transport");
+MODULE_LICENSE("GPL");
diff --git a/ap/os/linux/linux-3.4.x/drivers/nfc/pn533.c b/ap/os/linux/linux-3.4.x/drivers/nfc/pn533.c
new file mode 100644
index 0000000..692bd1e
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/nfc/pn533.c
@@ -0,0 +1,1769 @@
+/*
+ * Copyright (C) 2011 Instituto Nokia de Tecnologia
+ *
+ * Authors:
+ * Lauro Ramos Venancio <lauro.venancio@openbossa.org>
+ * Aloisio Almeida Jr <aloisio.almeida@openbossa.org>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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, write to the
+ * Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/usb.h>
+#include <linux/nfc.h>
+#include <linux/netdevice.h>
+#include <net/nfc/nfc.h>
+
+#define VERSION "0.1"
+
+#define PN533_VENDOR_ID 0x4CC
+#define PN533_PRODUCT_ID 0x2533
+
+#define SCM_VENDOR_ID 0x4E6
+#define SCL3711_PRODUCT_ID 0x5591
+
+static const struct usb_device_id pn533_table[] = {
+ { USB_DEVICE(PN533_VENDOR_ID, PN533_PRODUCT_ID) },
+ { USB_DEVICE(SCM_VENDOR_ID, SCL3711_PRODUCT_ID) },
+ { }
+};
+MODULE_DEVICE_TABLE(usb, pn533_table);
+
+/* frame definitions */
+#define PN533_FRAME_TAIL_SIZE 2
+#define PN533_FRAME_SIZE(f) (sizeof(struct pn533_frame) + f->datalen + \
+ PN533_FRAME_TAIL_SIZE)
+#define PN533_FRAME_ACK_SIZE (sizeof(struct pn533_frame) + 1)
+#define PN533_FRAME_CHECKSUM(f) (f->data[f->datalen])
+#define PN533_FRAME_POSTAMBLE(f) (f->data[f->datalen + 1])
+
+/* start of frame */
+#define PN533_SOF 0x00FF
+
+/* frame identifier: in/out/error */
+#define PN533_FRAME_IDENTIFIER(f) (f->data[0])
+#define PN533_DIR_OUT 0xD4
+#define PN533_DIR_IN 0xD5
+
+/* PN533 Commands */
+#define PN533_FRAME_CMD(f) (f->data[1])
+#define PN533_FRAME_CMD_PARAMS_PTR(f) (&f->data[2])
+#define PN533_FRAME_CMD_PARAMS_LEN(f) (f->datalen - 2)
+
+#define PN533_CMD_GET_FIRMWARE_VERSION 0x02
+#define PN533_CMD_RF_CONFIGURATION 0x32
+#define PN533_CMD_IN_DATA_EXCHANGE 0x40
+#define PN533_CMD_IN_LIST_PASSIVE_TARGET 0x4A
+#define PN533_CMD_IN_ATR 0x50
+#define PN533_CMD_IN_RELEASE 0x52
+#define PN533_CMD_IN_JUMP_FOR_DEP 0x56
+
+#define PN533_CMD_RESPONSE(cmd) (cmd + 1)
+
+/* PN533 Return codes */
+#define PN533_CMD_RET_MASK 0x3F
+#define PN533_CMD_MI_MASK 0x40
+#define PN533_CMD_RET_SUCCESS 0x00
+
+struct pn533;
+
+typedef int (*pn533_cmd_complete_t) (struct pn533 *dev, void *arg,
+ u8 *params, int params_len);
+
+/* structs for pn533 commands */
+
+/* PN533_CMD_GET_FIRMWARE_VERSION */
+struct pn533_fw_version {
+ u8 ic;
+ u8 ver;
+ u8 rev;
+ u8 support;
+};
+
+/* PN533_CMD_RF_CONFIGURATION */
+#define PN533_CFGITEM_MAX_RETRIES 0x05
+
+#define PN533_CONFIG_MAX_RETRIES_NO_RETRY 0x00
+#define PN533_CONFIG_MAX_RETRIES_ENDLESS 0xFF
+
+struct pn533_config_max_retries {
+ u8 mx_rty_atr;
+ u8 mx_rty_psl;
+ u8 mx_rty_passive_act;
+} __packed;
+
+/* PN533_CMD_IN_LIST_PASSIVE_TARGET */
+
+/* felica commands opcode */
+#define PN533_FELICA_OPC_SENSF_REQ 0
+#define PN533_FELICA_OPC_SENSF_RES 1
+/* felica SENSF_REQ parameters */
+#define PN533_FELICA_SENSF_SC_ALL 0xFFFF
+#define PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE 0
+#define PN533_FELICA_SENSF_RC_SYSTEM_CODE 1
+#define PN533_FELICA_SENSF_RC_ADVANCED_PROTOCOL 2
+
+/* type B initiator_data values */
+#define PN533_TYPE_B_AFI_ALL_FAMILIES 0
+#define PN533_TYPE_B_POLL_METHOD_TIMESLOT 0
+#define PN533_TYPE_B_POLL_METHOD_PROBABILISTIC 1
+
+union pn533_cmd_poll_initdata {
+ struct {
+ u8 afi;
+ u8 polling_method;
+ } __packed type_b;
+ struct {
+ u8 opcode;
+ __be16 sc;
+ u8 rc;
+ u8 tsn;
+ } __packed felica;
+};
+
+/* Poll modulations */
+enum {
+ PN533_POLL_MOD_106KBPS_A,
+ PN533_POLL_MOD_212KBPS_FELICA,
+ PN533_POLL_MOD_424KBPS_FELICA,
+ PN533_POLL_MOD_106KBPS_JEWEL,
+ PN533_POLL_MOD_847KBPS_B,
+
+ __PN533_POLL_MOD_AFTER_LAST,
+};
+#define PN533_POLL_MOD_MAX (__PN533_POLL_MOD_AFTER_LAST - 1)
+
+struct pn533_poll_modulations {
+ struct {
+ u8 maxtg;
+ u8 brty;
+ union pn533_cmd_poll_initdata initiator_data;
+ } __packed data;
+ u8 len;
+};
+
+const struct pn533_poll_modulations poll_mod[] = {
+ [PN533_POLL_MOD_106KBPS_A] = {
+ .data = {
+ .maxtg = 1,
+ .brty = 0,
+ },
+ .len = 2,
+ },
+ [PN533_POLL_MOD_212KBPS_FELICA] = {
+ .data = {
+ .maxtg = 1,
+ .brty = 1,
+ .initiator_data.felica = {
+ .opcode = PN533_FELICA_OPC_SENSF_REQ,
+ .sc = PN533_FELICA_SENSF_SC_ALL,
+ .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
+ .tsn = 0,
+ },
+ },
+ .len = 7,
+ },
+ [PN533_POLL_MOD_424KBPS_FELICA] = {
+ .data = {
+ .maxtg = 1,
+ .brty = 2,
+ .initiator_data.felica = {
+ .opcode = PN533_FELICA_OPC_SENSF_REQ,
+ .sc = PN533_FELICA_SENSF_SC_ALL,
+ .rc = PN533_FELICA_SENSF_RC_NO_SYSTEM_CODE,
+ .tsn = 0,
+ },
+ },
+ .len = 7,
+ },
+ [PN533_POLL_MOD_106KBPS_JEWEL] = {
+ .data = {
+ .maxtg = 1,
+ .brty = 4,
+ },
+ .len = 2,
+ },
+ [PN533_POLL_MOD_847KBPS_B] = {
+ .data = {
+ .maxtg = 1,
+ .brty = 8,
+ .initiator_data.type_b = {
+ .afi = PN533_TYPE_B_AFI_ALL_FAMILIES,
+ .polling_method =
+ PN533_TYPE_B_POLL_METHOD_TIMESLOT,
+ },
+ },
+ .len = 3,
+ },
+};
+
+/* PN533_CMD_IN_ATR */
+
+struct pn533_cmd_activate_param {
+ u8 tg;
+ u8 next;
+} __packed;
+
+struct pn533_cmd_activate_response {
+ u8 status;
+ u8 nfcid3t[10];
+ u8 didt;
+ u8 bst;
+ u8 brt;
+ u8 to;
+ u8 ppt;
+ /* optional */
+ u8 gt[];
+} __packed;
+
+/* PN533_CMD_IN_JUMP_FOR_DEP */
+struct pn533_cmd_jump_dep {
+ u8 active;
+ u8 baud;
+ u8 next;
+ u8 gt[];
+} __packed;
+
+struct pn533_cmd_jump_dep_response {
+ u8 status;
+ u8 tg;
+ u8 nfcid3t[10];
+ u8 didt;
+ u8 bst;
+ u8 brt;
+ u8 to;
+ u8 ppt;
+ /* optional */
+ u8 gt[];
+} __packed;
+
+struct pn533 {
+ struct usb_device *udev;
+ struct usb_interface *interface;
+ struct nfc_dev *nfc_dev;
+
+ struct urb *out_urb;
+ int out_maxlen;
+ struct pn533_frame *out_frame;
+
+ struct urb *in_urb;
+ int in_maxlen;
+ struct pn533_frame *in_frame;
+
+ struct tasklet_struct tasklet;
+ struct pn533_frame *tklt_in_frame;
+ int tklt_in_error;
+
+ pn533_cmd_complete_t cmd_complete;
+ void *cmd_complete_arg;
+ struct semaphore cmd_lock;
+ u8 cmd;
+
+ struct pn533_poll_modulations *poll_mod_active[PN533_POLL_MOD_MAX + 1];
+ u8 poll_mod_count;
+ u8 poll_mod_curr;
+ u32 poll_protocols;
+
+ u8 tgt_available_prots;
+ u8 tgt_active_prot;
+};
+
+struct pn533_frame {
+ u8 preamble;
+ __be16 start_frame;
+ u8 datalen;
+ u8 datalen_checksum;
+ u8 data[];
+} __packed;
+
+/* The rule: value + checksum = 0 */
+static inline u8 pn533_checksum(u8 value)
+{
+ return ~value + 1;
+}
+
+/* The rule: sum(data elements) + checksum = 0 */
+static u8 pn533_data_checksum(u8 *data, int datalen)
+{
+ u8 sum = 0;
+ int i;
+
+ for (i = 0; i < datalen; i++)
+ sum += data[i];
+
+ return pn533_checksum(sum);
+}
+
+/**
+ * pn533_tx_frame_ack - create a ack frame
+ * @frame: The frame to be set as ack
+ *
+ * Ack is different type of standard frame. As a standard frame, it has
+ * preamble and start_frame. However the checksum of this frame must fail,
+ * i.e. datalen + datalen_checksum must NOT be zero. When the checksum test
+ * fails and datalen = 0 and datalen_checksum = 0xFF, the frame is a ack.
+ * After datalen_checksum field, the postamble is placed.
+ */
+static void pn533_tx_frame_ack(struct pn533_frame *frame)
+{
+ frame->preamble = 0;
+ frame->start_frame = cpu_to_be16(PN533_SOF);
+ frame->datalen = 0;
+ frame->datalen_checksum = 0xFF;
+ /* data[0] is used as postamble */
+ frame->data[0] = 0;
+}
+
+static void pn533_tx_frame_init(struct pn533_frame *frame, u8 cmd)
+{
+ frame->preamble = 0;
+ frame->start_frame = cpu_to_be16(PN533_SOF);
+ PN533_FRAME_IDENTIFIER(frame) = PN533_DIR_OUT;
+ PN533_FRAME_CMD(frame) = cmd;
+ frame->datalen = 2;
+}
+
+static void pn533_tx_frame_finish(struct pn533_frame *frame)
+{
+ frame->datalen_checksum = pn533_checksum(frame->datalen);
+
+ PN533_FRAME_CHECKSUM(frame) =
+ pn533_data_checksum(frame->data, frame->datalen);
+
+ PN533_FRAME_POSTAMBLE(frame) = 0;
+}
+
+static bool pn533_rx_frame_is_valid(struct pn533_frame *frame)
+{
+ u8 checksum;
+
+ if (frame->start_frame != cpu_to_be16(PN533_SOF))
+ return false;
+
+ checksum = pn533_checksum(frame->datalen);
+ if (checksum != frame->datalen_checksum)
+ return false;
+
+ checksum = pn533_data_checksum(frame->data, frame->datalen);
+ if (checksum != PN533_FRAME_CHECKSUM(frame))
+ return false;
+
+ return true;
+}
+
+static bool pn533_rx_frame_is_ack(struct pn533_frame *frame)
+{
+ if (frame->start_frame != cpu_to_be16(PN533_SOF))
+ return false;
+
+ if (frame->datalen != 0 || frame->datalen_checksum != 0xFF)
+ return false;
+
+ return true;
+}
+
+static bool pn533_rx_frame_is_cmd_response(struct pn533_frame *frame, u8 cmd)
+{
+ return (PN533_FRAME_CMD(frame) == PN533_CMD_RESPONSE(cmd));
+}
+
+static void pn533_tasklet_cmd_complete(unsigned long arg)
+{
+ struct pn533 *dev = (struct pn533 *) arg;
+ struct pn533_frame *in_frame = dev->tklt_in_frame;
+ int rc;
+
+ if (dev->tklt_in_error)
+ rc = dev->cmd_complete(dev, dev->cmd_complete_arg, NULL,
+ dev->tklt_in_error);
+ else
+ rc = dev->cmd_complete(dev, dev->cmd_complete_arg,
+ PN533_FRAME_CMD_PARAMS_PTR(in_frame),
+ PN533_FRAME_CMD_PARAMS_LEN(in_frame));
+
+ if (rc != -EINPROGRESS)
+ up(&dev->cmd_lock);
+}
+
+static void pn533_recv_response(struct urb *urb)
+{
+ struct pn533 *dev = urb->context;
+ struct pn533_frame *in_frame;
+
+ dev->tklt_in_frame = NULL;
+
+ switch (urb->status) {
+ case 0:
+ /* success */
+ break;
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
+ " status: %d", urb->status);
+ dev->tklt_in_error = urb->status;
+ goto sched_tasklet;
+ default:
+ nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:"
+ " %d", urb->status);
+ dev->tklt_in_error = urb->status;
+ goto sched_tasklet;
+ }
+
+ in_frame = dev->in_urb->transfer_buffer;
+
+ if (!pn533_rx_frame_is_valid(in_frame)) {
+ nfc_dev_err(&dev->interface->dev, "Received an invalid frame");
+ dev->tklt_in_error = -EIO;
+ goto sched_tasklet;
+ }
+
+ if (!pn533_rx_frame_is_cmd_response(in_frame, dev->cmd)) {
+ nfc_dev_err(&dev->interface->dev, "The received frame is not "
+ "response to the last command");
+ dev->tklt_in_error = -EIO;
+ goto sched_tasklet;
+ }
+
+ nfc_dev_dbg(&dev->interface->dev, "Received a valid frame");
+ dev->tklt_in_error = 0;
+ dev->tklt_in_frame = in_frame;
+
+sched_tasklet:
+ tasklet_schedule(&dev->tasklet);
+}
+
+static int pn533_submit_urb_for_response(struct pn533 *dev, gfp_t flags)
+{
+ dev->in_urb->complete = pn533_recv_response;
+
+ return usb_submit_urb(dev->in_urb, flags);
+}
+
+static void pn533_recv_ack(struct urb *urb)
+{
+ struct pn533 *dev = urb->context;
+ struct pn533_frame *in_frame;
+ int rc;
+
+ switch (urb->status) {
+ case 0:
+ /* success */
+ break;
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
+ " status: %d", urb->status);
+ dev->tklt_in_error = urb->status;
+ goto sched_tasklet;
+ default:
+ nfc_dev_err(&dev->interface->dev, "Nonzero urb status received:"
+ " %d", urb->status);
+ dev->tklt_in_error = urb->status;
+ goto sched_tasklet;
+ }
+
+ in_frame = dev->in_urb->transfer_buffer;
+
+ if (!pn533_rx_frame_is_ack(in_frame)) {
+ nfc_dev_err(&dev->interface->dev, "Received an invalid ack");
+ dev->tklt_in_error = -EIO;
+ goto sched_tasklet;
+ }
+
+ nfc_dev_dbg(&dev->interface->dev, "Received a valid ack");
+
+ rc = pn533_submit_urb_for_response(dev, GFP_ATOMIC);
+ if (rc) {
+ nfc_dev_err(&dev->interface->dev, "usb_submit_urb failed with"
+ " result %d", rc);
+ dev->tklt_in_error = rc;
+ goto sched_tasklet;
+ }
+
+ return;
+
+sched_tasklet:
+ dev->tklt_in_frame = NULL;
+ tasklet_schedule(&dev->tasklet);
+}
+
+static int pn533_submit_urb_for_ack(struct pn533 *dev, gfp_t flags)
+{
+ dev->in_urb->complete = pn533_recv_ack;
+
+ return usb_submit_urb(dev->in_urb, flags);
+}
+
+static int pn533_send_ack(struct pn533 *dev, gfp_t flags)
+{
+ int rc;
+
+ nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
+
+ pn533_tx_frame_ack(dev->out_frame);
+
+ dev->out_urb->transfer_buffer = dev->out_frame;
+ dev->out_urb->transfer_buffer_length = PN533_FRAME_ACK_SIZE;
+ rc = usb_submit_urb(dev->out_urb, flags);
+
+ return rc;
+}
+
+static int __pn533_send_cmd_frame_async(struct pn533 *dev,
+ struct pn533_frame *out_frame,
+ struct pn533_frame *in_frame,
+ int in_frame_len,
+ pn533_cmd_complete_t cmd_complete,
+ void *arg, gfp_t flags)
+{
+ int rc;
+
+ nfc_dev_dbg(&dev->interface->dev, "Sending command 0x%x",
+ PN533_FRAME_CMD(out_frame));
+
+ dev->cmd = PN533_FRAME_CMD(out_frame);
+ dev->cmd_complete = cmd_complete;
+ dev->cmd_complete_arg = arg;
+
+ dev->out_urb->transfer_buffer = out_frame;
+ dev->out_urb->transfer_buffer_length =
+ PN533_FRAME_SIZE(out_frame);
+
+ dev->in_urb->transfer_buffer = in_frame;
+ dev->in_urb->transfer_buffer_length = in_frame_len;
+
+ rc = usb_submit_urb(dev->out_urb, flags);
+ if (rc)
+ return rc;
+
+ rc = pn533_submit_urb_for_ack(dev, flags);
+ if (rc)
+ goto error;
+
+ return 0;
+
+error:
+ usb_unlink_urb(dev->out_urb);
+ return rc;
+}
+
+static int pn533_send_cmd_frame_async(struct pn533 *dev,
+ struct pn533_frame *out_frame,
+ struct pn533_frame *in_frame,
+ int in_frame_len,
+ pn533_cmd_complete_t cmd_complete,
+ void *arg, gfp_t flags)
+{
+ int rc;
+
+ nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
+
+ if (down_trylock(&dev->cmd_lock))
+ return -EBUSY;
+
+ rc = __pn533_send_cmd_frame_async(dev, out_frame, in_frame,
+ in_frame_len, cmd_complete, arg, flags);
+ if (rc)
+ goto error;
+
+ return 0;
+error:
+ up(&dev->cmd_lock);
+ return rc;
+}
+
+struct pn533_sync_cmd_response {
+ int rc;
+ struct completion done;
+};
+
+static int pn533_sync_cmd_complete(struct pn533 *dev, void *_arg,
+ u8 *params, int params_len)
+{
+ struct pn533_sync_cmd_response *arg = _arg;
+
+ nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
+
+ arg->rc = 0;
+
+ if (params_len < 0) /* error */
+ arg->rc = params_len;
+
+ complete(&arg->done);
+
+ return 0;
+}
+
+static int pn533_send_cmd_frame_sync(struct pn533 *dev,
+ struct pn533_frame *out_frame,
+ struct pn533_frame *in_frame,
+ int in_frame_len)
+{
+ int rc;
+ struct pn533_sync_cmd_response arg;
+
+ nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
+
+ init_completion(&arg.done);
+
+ rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, in_frame_len,
+ pn533_sync_cmd_complete, &arg, GFP_KERNEL);
+ if (rc)
+ return rc;
+
+ wait_for_completion(&arg.done);
+
+ return arg.rc;
+}
+
+static void pn533_send_complete(struct urb *urb)
+{
+ struct pn533 *dev = urb->context;
+
+ nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
+
+ switch (urb->status) {
+ case 0:
+ /* success */
+ break;
+ case -ECONNRESET:
+ case -ENOENT:
+ case -ESHUTDOWN:
+ nfc_dev_dbg(&dev->interface->dev, "Urb shutting down with"
+ " status: %d", urb->status);
+ break;
+ default:
+ nfc_dev_dbg(&dev->interface->dev, "Nonzero urb status received:"
+ " %d", urb->status);
+ }
+}
+
+struct pn533_target_type_a {
+ __be16 sens_res;
+ u8 sel_res;
+ u8 nfcid_len;
+ u8 nfcid_data[];
+} __packed;
+
+
+#define PN533_TYPE_A_SENS_RES_NFCID1(x) ((u8)((be16_to_cpu(x) & 0x00C0) >> 6))
+#define PN533_TYPE_A_SENS_RES_SSD(x) ((u8)((be16_to_cpu(x) & 0x001F) >> 0))
+#define PN533_TYPE_A_SENS_RES_PLATCONF(x) ((u8)((be16_to_cpu(x) & 0x0F00) >> 8))
+
+#define PN533_TYPE_A_SENS_RES_SSD_JEWEL 0x00
+#define PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL 0x0C
+
+#define PN533_TYPE_A_SEL_PROT(x) (((x) & 0x60) >> 5)
+#define PN533_TYPE_A_SEL_CASCADE(x) (((x) & 0x04) >> 2)
+
+#define PN533_TYPE_A_SEL_PROT_MIFARE 0
+#define PN533_TYPE_A_SEL_PROT_ISO14443 1
+#define PN533_TYPE_A_SEL_PROT_DEP 2
+#define PN533_TYPE_A_SEL_PROT_ISO14443_DEP 3
+
+static bool pn533_target_type_a_is_valid(struct pn533_target_type_a *type_a,
+ int target_data_len)
+{
+ u8 ssd;
+ u8 platconf;
+
+ if (target_data_len < sizeof(struct pn533_target_type_a))
+ return false;
+
+ /* The lenght check of nfcid[] and ats[] are not being performed because
+ the values are not being used */
+
+ /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
+ ssd = PN533_TYPE_A_SENS_RES_SSD(type_a->sens_res);
+ platconf = PN533_TYPE_A_SENS_RES_PLATCONF(type_a->sens_res);
+
+ if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
+ platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
+ (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
+ platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
+ return false;
+
+ /* Requirements 4.8.2.1, 4.8.2.3, 4.8.2.5 and 4.8.2.7 from NFC Forum */
+ if (PN533_TYPE_A_SEL_CASCADE(type_a->sel_res) != 0)
+ return false;
+
+ return true;
+}
+
+static int pn533_target_found_type_a(struct nfc_target *nfc_tgt, u8 *tgt_data,
+ int tgt_data_len)
+{
+ struct pn533_target_type_a *tgt_type_a;
+
+ tgt_type_a = (struct pn533_target_type_a *) tgt_data;
+
+ if (!pn533_target_type_a_is_valid(tgt_type_a, tgt_data_len))
+ return -EPROTO;
+
+ switch (PN533_TYPE_A_SEL_PROT(tgt_type_a->sel_res)) {
+ case PN533_TYPE_A_SEL_PROT_MIFARE:
+ nfc_tgt->supported_protocols = NFC_PROTO_MIFARE_MASK;
+ break;
+ case PN533_TYPE_A_SEL_PROT_ISO14443:
+ nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
+ break;
+ case PN533_TYPE_A_SEL_PROT_DEP:
+ nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
+ break;
+ case PN533_TYPE_A_SEL_PROT_ISO14443_DEP:
+ nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK |
+ NFC_PROTO_NFC_DEP_MASK;
+ break;
+ }
+
+ nfc_tgt->sens_res = be16_to_cpu(tgt_type_a->sens_res);
+ nfc_tgt->sel_res = tgt_type_a->sel_res;
+ nfc_tgt->nfcid1_len = tgt_type_a->nfcid_len;
+ memcpy(nfc_tgt->nfcid1, tgt_type_a->nfcid_data, nfc_tgt->nfcid1_len);
+
+ return 0;
+}
+
+struct pn533_target_felica {
+ u8 pol_res;
+ u8 opcode;
+ u8 nfcid2[8];
+ u8 pad[8];
+ /* optional */
+ u8 syst_code[];
+} __packed;
+
+#define PN533_FELICA_SENSF_NFCID2_DEP_B1 0x01
+#define PN533_FELICA_SENSF_NFCID2_DEP_B2 0xFE
+
+static bool pn533_target_felica_is_valid(struct pn533_target_felica *felica,
+ int target_data_len)
+{
+ if (target_data_len < sizeof(struct pn533_target_felica))
+ return false;
+
+ if (felica->opcode != PN533_FELICA_OPC_SENSF_RES)
+ return false;
+
+ return true;
+}
+
+static int pn533_target_found_felica(struct nfc_target *nfc_tgt, u8 *tgt_data,
+ int tgt_data_len)
+{
+ struct pn533_target_felica *tgt_felica;
+
+ tgt_felica = (struct pn533_target_felica *) tgt_data;
+
+ if (!pn533_target_felica_is_valid(tgt_felica, tgt_data_len))
+ return -EPROTO;
+
+ if (tgt_felica->nfcid2[0] == PN533_FELICA_SENSF_NFCID2_DEP_B1 &&
+ tgt_felica->nfcid2[1] ==
+ PN533_FELICA_SENSF_NFCID2_DEP_B2)
+ nfc_tgt->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
+ else
+ nfc_tgt->supported_protocols = NFC_PROTO_FELICA_MASK;
+
+ memcpy(nfc_tgt->sensf_res, &tgt_felica->opcode, 9);
+ nfc_tgt->sensf_res_len = 9;
+
+ return 0;
+}
+
+struct pn533_target_jewel {
+ __be16 sens_res;
+ u8 jewelid[4];
+} __packed;
+
+static bool pn533_target_jewel_is_valid(struct pn533_target_jewel *jewel,
+ int target_data_len)
+{
+ u8 ssd;
+ u8 platconf;
+
+ if (target_data_len < sizeof(struct pn533_target_jewel))
+ return false;
+
+ /* Requirement 4.6.3.3 from NFC Forum Digital Spec */
+ ssd = PN533_TYPE_A_SENS_RES_SSD(jewel->sens_res);
+ platconf = PN533_TYPE_A_SENS_RES_PLATCONF(jewel->sens_res);
+
+ if ((ssd == PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
+ platconf != PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL) ||
+ (ssd != PN533_TYPE_A_SENS_RES_SSD_JEWEL &&
+ platconf == PN533_TYPE_A_SENS_RES_PLATCONF_JEWEL))
+ return false;
+
+ return true;
+}
+
+static int pn533_target_found_jewel(struct nfc_target *nfc_tgt, u8 *tgt_data,
+ int tgt_data_len)
+{
+ struct pn533_target_jewel *tgt_jewel;
+
+ tgt_jewel = (struct pn533_target_jewel *) tgt_data;
+
+ if (!pn533_target_jewel_is_valid(tgt_jewel, tgt_data_len))
+ return -EPROTO;
+
+ nfc_tgt->supported_protocols = NFC_PROTO_JEWEL_MASK;
+ nfc_tgt->sens_res = be16_to_cpu(tgt_jewel->sens_res);
+ nfc_tgt->nfcid1_len = 4;
+ memcpy(nfc_tgt->nfcid1, tgt_jewel->jewelid, nfc_tgt->nfcid1_len);
+
+ return 0;
+}
+
+struct pn533_type_b_prot_info {
+ u8 bitrate;
+ u8 fsci_type;
+ u8 fwi_adc_fo;
+} __packed;
+
+#define PN533_TYPE_B_PROT_FCSI(x) (((x) & 0xF0) >> 4)
+#define PN533_TYPE_B_PROT_TYPE(x) (((x) & 0x0F) >> 0)
+#define PN533_TYPE_B_PROT_TYPE_RFU_MASK 0x8
+
+struct pn533_type_b_sens_res {
+ u8 opcode;
+ u8 nfcid[4];
+ u8 appdata[4];
+ struct pn533_type_b_prot_info prot_info;
+} __packed;
+
+#define PN533_TYPE_B_OPC_SENSB_RES 0x50
+
+struct pn533_target_type_b {
+ struct pn533_type_b_sens_res sensb_res;
+ u8 attrib_res_len;
+ u8 attrib_res[];
+} __packed;
+
+static bool pn533_target_type_b_is_valid(struct pn533_target_type_b *type_b,
+ int target_data_len)
+{
+ if (target_data_len < sizeof(struct pn533_target_type_b))
+ return false;
+
+ if (type_b->sensb_res.opcode != PN533_TYPE_B_OPC_SENSB_RES)
+ return false;
+
+ if (PN533_TYPE_B_PROT_TYPE(type_b->sensb_res.prot_info.fsci_type) &
+ PN533_TYPE_B_PROT_TYPE_RFU_MASK)
+ return false;
+
+ return true;
+}
+
+static int pn533_target_found_type_b(struct nfc_target *nfc_tgt, u8 *tgt_data,
+ int tgt_data_len)
+{
+ struct pn533_target_type_b *tgt_type_b;
+
+ tgt_type_b = (struct pn533_target_type_b *) tgt_data;
+
+ if (!pn533_target_type_b_is_valid(tgt_type_b, tgt_data_len))
+ return -EPROTO;
+
+ nfc_tgt->supported_protocols = NFC_PROTO_ISO14443_MASK;
+
+ return 0;
+}
+
+struct pn533_poll_response {
+ u8 nbtg;
+ u8 tg;
+ u8 target_data[];
+} __packed;
+
+static int pn533_target_found(struct pn533 *dev,
+ struct pn533_poll_response *resp, int resp_len)
+{
+ int target_data_len;
+ struct nfc_target nfc_tgt;
+ int rc;
+
+ nfc_dev_dbg(&dev->interface->dev, "%s - modulation=%d", __func__,
+ dev->poll_mod_curr);
+
+ if (resp->tg != 1)
+ return -EPROTO;
+
+ memset(&nfc_tgt, 0, sizeof(struct nfc_target));
+
+ target_data_len = resp_len - sizeof(struct pn533_poll_response);
+
+ switch (dev->poll_mod_curr) {
+ case PN533_POLL_MOD_106KBPS_A:
+ rc = pn533_target_found_type_a(&nfc_tgt, resp->target_data,
+ target_data_len);
+ break;
+ case PN533_POLL_MOD_212KBPS_FELICA:
+ case PN533_POLL_MOD_424KBPS_FELICA:
+ rc = pn533_target_found_felica(&nfc_tgt, resp->target_data,
+ target_data_len);
+ break;
+ case PN533_POLL_MOD_106KBPS_JEWEL:
+ rc = pn533_target_found_jewel(&nfc_tgt, resp->target_data,
+ target_data_len);
+ break;
+ case PN533_POLL_MOD_847KBPS_B:
+ rc = pn533_target_found_type_b(&nfc_tgt, resp->target_data,
+ target_data_len);
+ break;
+ default:
+ nfc_dev_err(&dev->interface->dev, "Unknown current poll"
+ " modulation");
+ return -EPROTO;
+ }
+
+ if (rc)
+ return rc;
+
+ if (!(nfc_tgt.supported_protocols & dev->poll_protocols)) {
+ nfc_dev_dbg(&dev->interface->dev, "The target found does not"
+ " have the desired protocol");
+ return -EAGAIN;
+ }
+
+ nfc_dev_dbg(&dev->interface->dev, "Target found - supported protocols: "
+ "0x%x", nfc_tgt.supported_protocols);
+
+ dev->tgt_available_prots = nfc_tgt.supported_protocols;
+
+ nfc_targets_found(dev->nfc_dev, &nfc_tgt, 1);
+
+ return 0;
+}
+
+static void pn533_poll_reset_mod_list(struct pn533 *dev)
+{
+ dev->poll_mod_count = 0;
+}
+
+static void pn533_poll_add_mod(struct pn533 *dev, u8 mod_index)
+{
+ dev->poll_mod_active[dev->poll_mod_count] =
+ (struct pn533_poll_modulations *) &poll_mod[mod_index];
+ dev->poll_mod_count++;
+}
+
+static void pn533_poll_create_mod_list(struct pn533 *dev, u32 protocols)
+{
+ pn533_poll_reset_mod_list(dev);
+
+ if (protocols & NFC_PROTO_MIFARE_MASK
+ || protocols & NFC_PROTO_ISO14443_MASK
+ || protocols & NFC_PROTO_NFC_DEP_MASK)
+ pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_A);
+
+ if (protocols & NFC_PROTO_FELICA_MASK
+ || protocols & NFC_PROTO_NFC_DEP_MASK) {
+ pn533_poll_add_mod(dev, PN533_POLL_MOD_212KBPS_FELICA);
+ pn533_poll_add_mod(dev, PN533_POLL_MOD_424KBPS_FELICA);
+ }
+
+ if (protocols & NFC_PROTO_JEWEL_MASK)
+ pn533_poll_add_mod(dev, PN533_POLL_MOD_106KBPS_JEWEL);
+
+ if (protocols & NFC_PROTO_ISO14443_MASK)
+ pn533_poll_add_mod(dev, PN533_POLL_MOD_847KBPS_B);
+}
+
+static void pn533_start_poll_frame(struct pn533_frame *frame,
+ struct pn533_poll_modulations *mod)
+{
+
+ pn533_tx_frame_init(frame, PN533_CMD_IN_LIST_PASSIVE_TARGET);
+
+ memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), &mod->data, mod->len);
+ frame->datalen += mod->len;
+
+ pn533_tx_frame_finish(frame);
+}
+
+static int pn533_start_poll_complete(struct pn533 *dev, void *arg,
+ u8 *params, int params_len)
+{
+ struct pn533_poll_response *resp;
+ struct pn533_poll_modulations *next_mod;
+ int rc;
+
+ nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
+
+ if (params_len == -ENOENT) {
+ nfc_dev_dbg(&dev->interface->dev, "Polling operation has been"
+ " stopped");
+ goto stop_poll;
+ }
+
+ if (params_len < 0) {
+ nfc_dev_err(&dev->interface->dev, "Error %d when running poll",
+ params_len);
+ goto stop_poll;
+ }
+
+ resp = (struct pn533_poll_response *) params;
+ if (resp->nbtg) {
+ rc = pn533_target_found(dev, resp, params_len);
+
+ /* We must stop the poll after a valid target found */
+ if (rc == 0)
+ goto stop_poll;
+
+ if (rc != -EAGAIN)
+ nfc_dev_err(&dev->interface->dev, "The target found is"
+ " not valid - continuing to poll");
+ }
+
+ dev->poll_mod_curr = (dev->poll_mod_curr + 1) % dev->poll_mod_count;
+
+ next_mod = dev->poll_mod_active[dev->poll_mod_curr];
+
+ nfc_dev_dbg(&dev->interface->dev, "Polling next modulation (0x%x)",
+ dev->poll_mod_curr);
+
+ pn533_start_poll_frame(dev->out_frame, next_mod);
+
+ /* Don't need to down the semaphore again */
+ rc = __pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
+ dev->in_maxlen, pn533_start_poll_complete,
+ NULL, GFP_ATOMIC);
+
+ if (rc == -EPERM) {
+ nfc_dev_dbg(&dev->interface->dev, "Cannot poll next modulation"
+ " because poll has been stopped");
+ goto stop_poll;
+ }
+
+ if (rc) {
+ nfc_dev_err(&dev->interface->dev, "Error %d when trying to poll"
+ " next modulation", rc);
+ goto stop_poll;
+ }
+
+ /* Inform caller function to do not up the semaphore */
+ return -EINPROGRESS;
+
+stop_poll:
+ pn533_poll_reset_mod_list(dev);
+ dev->poll_protocols = 0;
+ return 0;
+}
+
+static int pn533_start_poll(struct nfc_dev *nfc_dev, u32 protocols)
+{
+ struct pn533 *dev = nfc_get_drvdata(nfc_dev);
+ struct pn533_poll_modulations *start_mod;
+ int rc;
+
+ nfc_dev_dbg(&dev->interface->dev, "%s - protocols=0x%x", __func__,
+ protocols);
+
+ if (dev->poll_mod_count) {
+ nfc_dev_err(&dev->interface->dev, "Polling operation already"
+ " active");
+ return -EBUSY;
+ }
+
+ if (dev->tgt_active_prot) {
+ nfc_dev_err(&dev->interface->dev, "Cannot poll with a target"
+ " already activated");
+ return -EBUSY;
+ }
+
+ pn533_poll_create_mod_list(dev, protocols);
+
+ if (!dev->poll_mod_count) {
+ nfc_dev_err(&dev->interface->dev, "No valid protocols"
+ " specified");
+ rc = -EINVAL;
+ goto error;
+ }
+
+ nfc_dev_dbg(&dev->interface->dev, "It will poll %d modulations types",
+ dev->poll_mod_count);
+
+ dev->poll_mod_curr = 0;
+ start_mod = dev->poll_mod_active[dev->poll_mod_curr];
+
+ pn533_start_poll_frame(dev->out_frame, start_mod);
+
+ rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
+ dev->in_maxlen, pn533_start_poll_complete,
+ NULL, GFP_KERNEL);
+
+ if (rc) {
+ nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
+ " start poll", rc);
+ goto error;
+ }
+
+ dev->poll_protocols = protocols;
+
+ return 0;
+
+error:
+ pn533_poll_reset_mod_list(dev);
+ return rc;
+}
+
+static void pn533_stop_poll(struct nfc_dev *nfc_dev)
+{
+ struct pn533 *dev = nfc_get_drvdata(nfc_dev);
+
+ nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
+
+ if (!dev->poll_mod_count) {
+ nfc_dev_dbg(&dev->interface->dev, "Polling operation was not"
+ " running");
+ return;
+ }
+
+ /* An ack will cancel the last issued command (poll) */
+ pn533_send_ack(dev, GFP_KERNEL);
+
+ /* prevent pn533_start_poll_complete to issue a new poll meanwhile */
+ usb_kill_urb(dev->in_urb);
+}
+
+static int pn533_activate_target_nfcdep(struct pn533 *dev)
+{
+ struct pn533_cmd_activate_param param;
+ struct pn533_cmd_activate_response *resp;
+ u16 gt_len;
+ int rc;
+
+ nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
+
+ pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_ATR);
+
+ param.tg = 1;
+ param.next = 0;
+ memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), ¶m,
+ sizeof(struct pn533_cmd_activate_param));
+ dev->out_frame->datalen += sizeof(struct pn533_cmd_activate_param);
+
+ pn533_tx_frame_finish(dev->out_frame);
+
+ rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
+ dev->in_maxlen);
+ if (rc)
+ return rc;
+
+ resp = (struct pn533_cmd_activate_response *)
+ PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
+ rc = resp->status & PN533_CMD_RET_MASK;
+ if (rc != PN533_CMD_RET_SUCCESS)
+ return -EIO;
+
+ /* ATR_RES general bytes are located at offset 16 */
+ gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 16;
+ rc = nfc_set_remote_general_bytes(dev->nfc_dev, resp->gt, gt_len);
+
+ return rc;
+}
+
+static int pn533_activate_target(struct nfc_dev *nfc_dev, u32 target_idx,
+ u32 protocol)
+{
+ struct pn533 *dev = nfc_get_drvdata(nfc_dev);
+ int rc;
+
+ nfc_dev_dbg(&dev->interface->dev, "%s - protocol=%u", __func__,
+ protocol);
+
+ if (dev->poll_mod_count) {
+ nfc_dev_err(&dev->interface->dev, "Cannot activate while"
+ " polling");
+ return -EBUSY;
+ }
+
+ if (dev->tgt_active_prot) {
+ nfc_dev_err(&dev->interface->dev, "There is already an active"
+ " target");
+ return -EBUSY;
+ }
+
+ if (!dev->tgt_available_prots) {
+ nfc_dev_err(&dev->interface->dev, "There is no available target"
+ " to activate");
+ return -EINVAL;
+ }
+
+ if (!(dev->tgt_available_prots & (1 << protocol))) {
+ nfc_dev_err(&dev->interface->dev, "The target does not support"
+ " the requested protocol %u", protocol);
+ return -EINVAL;
+ }
+
+ if (protocol == NFC_PROTO_NFC_DEP) {
+ rc = pn533_activate_target_nfcdep(dev);
+ if (rc) {
+ nfc_dev_err(&dev->interface->dev, "Error %d when"
+ " activating target with"
+ " NFC_DEP protocol", rc);
+ return rc;
+ }
+ }
+
+ dev->tgt_active_prot = protocol;
+ dev->tgt_available_prots = 0;
+
+ return 0;
+}
+
+static void pn533_deactivate_target(struct nfc_dev *nfc_dev, u32 target_idx)
+{
+ struct pn533 *dev = nfc_get_drvdata(nfc_dev);
+ u8 tg;
+ u8 status;
+ int rc;
+
+ nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
+
+ if (!dev->tgt_active_prot) {
+ nfc_dev_err(&dev->interface->dev, "There is no active target");
+ return;
+ }
+
+ dev->tgt_active_prot = 0;
+
+ pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_RELEASE);
+
+ tg = 1;
+ memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &tg, sizeof(u8));
+ dev->out_frame->datalen += sizeof(u8);
+
+ pn533_tx_frame_finish(dev->out_frame);
+
+ rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
+ dev->in_maxlen);
+ if (rc) {
+ nfc_dev_err(&dev->interface->dev, "Error when sending release"
+ " command to the controller");
+ return;
+ }
+
+ status = PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame)[0];
+ rc = status & PN533_CMD_RET_MASK;
+ if (rc != PN533_CMD_RET_SUCCESS)
+ nfc_dev_err(&dev->interface->dev, "Error 0x%x when releasing"
+ " the target", rc);
+
+ return;
+}
+
+
+static int pn533_in_dep_link_up_complete(struct pn533 *dev, void *arg,
+ u8 *params, int params_len)
+{
+ struct pn533_cmd_jump_dep_response *resp;
+ struct nfc_target nfc_target;
+ u8 target_gt_len;
+ int rc;
+ struct pn533_cmd_jump_dep *cmd = (struct pn533_cmd_jump_dep *)arg;
+ u8 active = cmd->active;
+
+ kfree(arg);
+
+ if (params_len == -ENOENT) {
+ nfc_dev_dbg(&dev->interface->dev, "");
+ return 0;
+ }
+
+ if (params_len < 0) {
+ nfc_dev_err(&dev->interface->dev,
+ "Error %d when bringing DEP link up",
+ params_len);
+ return 0;
+ }
+
+ if (dev->tgt_available_prots &&
+ !(dev->tgt_available_prots & (1 << NFC_PROTO_NFC_DEP))) {
+ nfc_dev_err(&dev->interface->dev,
+ "The target does not support DEP");
+ return -EINVAL;
+ }
+
+ resp = (struct pn533_cmd_jump_dep_response *) params;
+ rc = resp->status & PN533_CMD_RET_MASK;
+ if (rc != PN533_CMD_RET_SUCCESS) {
+ nfc_dev_err(&dev->interface->dev,
+ "Bringing DEP link up failed %d", rc);
+ return 0;
+ }
+
+ if (!dev->tgt_available_prots) {
+ nfc_dev_dbg(&dev->interface->dev, "Creating new target");
+
+ nfc_target.supported_protocols = NFC_PROTO_NFC_DEP_MASK;
+ nfc_target.nfcid1_len = 10;
+ memcpy(nfc_target.nfcid1, resp->nfcid3t, nfc_target.nfcid1_len);
+ rc = nfc_targets_found(dev->nfc_dev, &nfc_target, 1);
+ if (rc)
+ return 0;
+
+ dev->tgt_available_prots = 0;
+ }
+
+ dev->tgt_active_prot = NFC_PROTO_NFC_DEP;
+
+ /* ATR_RES general bytes are located at offset 17 */
+ target_gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 17;
+ rc = nfc_set_remote_general_bytes(dev->nfc_dev,
+ resp->gt, target_gt_len);
+ if (rc == 0)
+ rc = nfc_dep_link_is_up(dev->nfc_dev,
+ dev->nfc_dev->targets[0].idx,
+ !active, NFC_RF_INITIATOR);
+
+ return 0;
+}
+
+static int pn533_dep_link_up(struct nfc_dev *nfc_dev, int target_idx,
+ u8 comm_mode, u8* gb, size_t gb_len)
+{
+ struct pn533 *dev = nfc_get_drvdata(nfc_dev);
+ struct pn533_cmd_jump_dep *cmd;
+ u8 cmd_len;
+ int rc;
+
+ nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
+
+ if (dev->poll_mod_count) {
+ nfc_dev_err(&dev->interface->dev,
+ "Cannot bring the DEP link up while polling");
+ return -EBUSY;
+ }
+
+ if (dev->tgt_active_prot) {
+ nfc_dev_err(&dev->interface->dev,
+ "There is already an active target");
+ return -EBUSY;
+ }
+
+ cmd_len = sizeof(struct pn533_cmd_jump_dep) + gb_len;
+ cmd = kzalloc(cmd_len, GFP_KERNEL);
+ if (cmd == NULL)
+ return -ENOMEM;
+
+ pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_JUMP_FOR_DEP);
+
+ cmd->active = !comm_mode;
+ cmd->baud = 0;
+ if (gb != NULL && gb_len > 0) {
+ cmd->next = 4; /* We have some Gi */
+ memcpy(cmd->gt, gb, gb_len);
+ } else {
+ cmd->next = 0;
+ }
+
+ memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), cmd, cmd_len);
+ dev->out_frame->datalen += cmd_len;
+
+ pn533_tx_frame_finish(dev->out_frame);
+
+ rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
+ dev->in_maxlen, pn533_in_dep_link_up_complete,
+ cmd, GFP_KERNEL);
+ if (rc < 0)
+ kfree(cmd);
+
+ return rc;
+}
+
+static int pn533_dep_link_down(struct nfc_dev *nfc_dev)
+{
+ pn533_deactivate_target(nfc_dev, 0);
+
+ return 0;
+}
+
+#define PN533_CMD_DATAEXCH_HEAD_LEN (sizeof(struct pn533_frame) + 3)
+#define PN533_CMD_DATAEXCH_DATA_MAXLEN 262
+
+static int pn533_data_exchange_tx_frame(struct pn533 *dev, struct sk_buff *skb)
+{
+ int payload_len = skb->len;
+ struct pn533_frame *out_frame;
+ u8 tg;
+
+ nfc_dev_dbg(&dev->interface->dev, "%s - Sending %d bytes", __func__,
+ payload_len);
+
+ if (payload_len > PN533_CMD_DATAEXCH_DATA_MAXLEN) {
+ /* TODO: Implement support to multi-part data exchange */
+ nfc_dev_err(&dev->interface->dev, "Data length greater than the"
+ " max allowed: %d",
+ PN533_CMD_DATAEXCH_DATA_MAXLEN);
+ return -ENOSYS;
+ }
+
+ skb_push(skb, PN533_CMD_DATAEXCH_HEAD_LEN);
+ out_frame = (struct pn533_frame *) skb->data;
+
+ pn533_tx_frame_init(out_frame, PN533_CMD_IN_DATA_EXCHANGE);
+
+ tg = 1;
+ memcpy(PN533_FRAME_CMD_PARAMS_PTR(out_frame), &tg, sizeof(u8));
+ out_frame->datalen += sizeof(u8);
+
+ /* The data is already in the out_frame, just update the datalen */
+ out_frame->datalen += payload_len;
+
+ pn533_tx_frame_finish(out_frame);
+ skb_put(skb, PN533_FRAME_TAIL_SIZE);
+
+ return 0;
+}
+
+struct pn533_data_exchange_arg {
+ struct sk_buff *skb_resp;
+ struct sk_buff *skb_out;
+ data_exchange_cb_t cb;
+ void *cb_context;
+};
+
+static int pn533_data_exchange_complete(struct pn533 *dev, void *_arg,
+ u8 *params, int params_len)
+{
+ struct pn533_data_exchange_arg *arg = _arg;
+ struct sk_buff *skb_resp = arg->skb_resp;
+ struct pn533_frame *in_frame = (struct pn533_frame *) skb_resp->data;
+ int err = 0;
+ u8 status;
+ u8 cmd_ret;
+
+ nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
+
+ dev_kfree_skb_irq(arg->skb_out);
+
+ if (params_len < 0) { /* error */
+ err = params_len;
+ goto error;
+ }
+
+ skb_put(skb_resp, PN533_FRAME_SIZE(in_frame));
+
+ status = params[0];
+
+ cmd_ret = status & PN533_CMD_RET_MASK;
+ if (cmd_ret != PN533_CMD_RET_SUCCESS) {
+ nfc_dev_err(&dev->interface->dev, "PN533 reported error %d when"
+ " exchanging data", cmd_ret);
+ err = -EIO;
+ goto error;
+ }
+
+ if (status & PN533_CMD_MI_MASK) {
+ /* TODO: Implement support to multi-part data exchange */
+ nfc_dev_err(&dev->interface->dev, "Multi-part message not yet"
+ " supported");
+ /* Prevent the other messages from controller */
+ pn533_send_ack(dev, GFP_ATOMIC);
+ err = -ENOSYS;
+ goto error;
+ }
+
+ skb_pull(skb_resp, PN533_CMD_DATAEXCH_HEAD_LEN);
+ skb_trim(skb_resp, skb_resp->len - PN533_FRAME_TAIL_SIZE);
+
+ arg->cb(arg->cb_context, skb_resp, 0);
+ kfree(arg);
+ return 0;
+
+error:
+ dev_kfree_skb_irq(skb_resp);
+ arg->cb(arg->cb_context, NULL, err);
+ kfree(arg);
+ return 0;
+}
+
+static int pn533_data_exchange(struct nfc_dev *nfc_dev, u32 target_idx,
+ struct sk_buff *skb,
+ data_exchange_cb_t cb,
+ void *cb_context)
+{
+ struct pn533 *dev = nfc_get_drvdata(nfc_dev);
+ struct pn533_frame *out_frame, *in_frame;
+ struct pn533_data_exchange_arg *arg;
+ struct sk_buff *skb_resp;
+ int skb_resp_len;
+ int rc;
+
+ nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
+
+ if (!dev->tgt_active_prot) {
+ nfc_dev_err(&dev->interface->dev, "Cannot exchange data if"
+ " there is no active target");
+ rc = -EINVAL;
+ goto error;
+ }
+
+ rc = pn533_data_exchange_tx_frame(dev, skb);
+ if (rc)
+ goto error;
+
+ skb_resp_len = PN533_CMD_DATAEXCH_HEAD_LEN +
+ PN533_CMD_DATAEXCH_DATA_MAXLEN +
+ PN533_FRAME_TAIL_SIZE;
+
+ skb_resp = nfc_alloc_recv_skb(skb_resp_len, GFP_KERNEL);
+ if (!skb_resp) {
+ rc = -ENOMEM;
+ goto error;
+ }
+
+ in_frame = (struct pn533_frame *) skb_resp->data;
+ out_frame = (struct pn533_frame *) skb->data;
+
+ arg = kmalloc(sizeof(struct pn533_data_exchange_arg), GFP_KERNEL);
+ if (!arg) {
+ rc = -ENOMEM;
+ goto free_skb_resp;
+ }
+
+ arg->skb_resp = skb_resp;
+ arg->skb_out = skb;
+ arg->cb = cb;
+ arg->cb_context = cb_context;
+
+ rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, skb_resp_len,
+ pn533_data_exchange_complete, arg,
+ GFP_KERNEL);
+ if (rc) {
+ nfc_dev_err(&dev->interface->dev, "Error %d when trying to"
+ " perform data_exchange", rc);
+ goto free_arg;
+ }
+
+ return 0;
+
+free_arg:
+ kfree(arg);
+free_skb_resp:
+ kfree_skb(skb_resp);
+error:
+ kfree_skb(skb);
+ return rc;
+}
+
+static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
+ u8 cfgdata_len)
+{
+ int rc;
+ u8 *params;
+
+ nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
+
+ pn533_tx_frame_init(dev->out_frame, PN533_CMD_RF_CONFIGURATION);
+
+ params = PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame);
+ params[0] = cfgitem;
+ memcpy(¶ms[1], cfgdata, cfgdata_len);
+ dev->out_frame->datalen += (1 + cfgdata_len);
+
+ pn533_tx_frame_finish(dev->out_frame);
+
+ rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
+ dev->in_maxlen);
+
+ return rc;
+}
+
+struct nfc_ops pn533_nfc_ops = {
+ .dev_up = NULL,
+ .dev_down = NULL,
+ .dep_link_up = pn533_dep_link_up,
+ .dep_link_down = pn533_dep_link_down,
+ .start_poll = pn533_start_poll,
+ .stop_poll = pn533_stop_poll,
+ .activate_target = pn533_activate_target,
+ .deactivate_target = pn533_deactivate_target,
+ .data_exchange = pn533_data_exchange,
+};
+
+static int pn533_probe(struct usb_interface *interface,
+ const struct usb_device_id *id)
+{
+ struct pn533_fw_version *fw_ver;
+ struct pn533 *dev;
+ struct usb_host_interface *iface_desc;
+ struct usb_endpoint_descriptor *endpoint;
+ struct pn533_config_max_retries max_retries;
+ int in_endpoint = 0;
+ int out_endpoint = 0;
+ int rc = -ENOMEM;
+ int i;
+ u32 protocols;
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
+
+ dev->udev = usb_get_dev(interface_to_usbdev(interface));
+ dev->interface = interface;
+ sema_init(&dev->cmd_lock, 1);
+
+ iface_desc = interface->cur_altsetting;
+ for (i = 0; i < iface_desc->desc.bNumEndpoints; ++i) {
+ endpoint = &iface_desc->endpoint[i].desc;
+
+ if (!in_endpoint && usb_endpoint_is_bulk_in(endpoint)) {
+ dev->in_maxlen = le16_to_cpu(endpoint->wMaxPacketSize);
+ in_endpoint = endpoint->bEndpointAddress;
+ }
+
+ if (!out_endpoint && usb_endpoint_is_bulk_out(endpoint)) {
+ dev->out_maxlen =
+ le16_to_cpu(endpoint->wMaxPacketSize);
+ out_endpoint = endpoint->bEndpointAddress;
+ }
+ }
+
+ if (!in_endpoint || !out_endpoint) {
+ nfc_dev_err(&interface->dev, "Could not find bulk-in or"
+ " bulk-out endpoint");
+ rc = -ENODEV;
+ goto error;
+ }
+
+ dev->in_frame = kmalloc(dev->in_maxlen, GFP_KERNEL);
+ dev->in_urb = usb_alloc_urb(0, GFP_KERNEL);
+ dev->out_frame = kmalloc(dev->out_maxlen, GFP_KERNEL);
+ dev->out_urb = usb_alloc_urb(0, GFP_KERNEL);
+
+ if (!dev->in_frame || !dev->out_frame ||
+ !dev->in_urb || !dev->out_urb)
+ goto error;
+
+ usb_fill_bulk_urb(dev->in_urb, dev->udev,
+ usb_rcvbulkpipe(dev->udev, in_endpoint),
+ NULL, 0, NULL, dev);
+ usb_fill_bulk_urb(dev->out_urb, dev->udev,
+ usb_sndbulkpipe(dev->udev, out_endpoint),
+ NULL, 0,
+ pn533_send_complete, dev);
+
+ tasklet_init(&dev->tasklet, pn533_tasklet_cmd_complete, (ulong)dev);
+
+ usb_set_intfdata(interface, dev);
+
+ pn533_tx_frame_init(dev->out_frame, PN533_CMD_GET_FIRMWARE_VERSION);
+ pn533_tx_frame_finish(dev->out_frame);
+
+ rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
+ dev->in_maxlen);
+ if (rc)
+ goto kill_tasklet;
+
+ fw_ver = (struct pn533_fw_version *)
+ PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
+ nfc_dev_info(&dev->interface->dev, "NXP PN533 firmware ver %d.%d now"
+ " attached", fw_ver->ver, fw_ver->rev);
+
+ protocols = NFC_PROTO_JEWEL_MASK
+ | NFC_PROTO_MIFARE_MASK | NFC_PROTO_FELICA_MASK
+ | NFC_PROTO_ISO14443_MASK
+ | NFC_PROTO_NFC_DEP_MASK;
+
+ dev->nfc_dev = nfc_allocate_device(&pn533_nfc_ops, protocols,
+ PN533_CMD_DATAEXCH_HEAD_LEN,
+ PN533_FRAME_TAIL_SIZE);
+ if (!dev->nfc_dev)
+ goto kill_tasklet;
+
+ nfc_set_parent_dev(dev->nfc_dev, &interface->dev);
+ nfc_set_drvdata(dev->nfc_dev, dev);
+
+ rc = nfc_register_device(dev->nfc_dev);
+ if (rc)
+ goto free_nfc_dev;
+
+ max_retries.mx_rty_atr = PN533_CONFIG_MAX_RETRIES_ENDLESS;
+ max_retries.mx_rty_psl = 2;
+ max_retries.mx_rty_passive_act = PN533_CONFIG_MAX_RETRIES_NO_RETRY;
+
+ rc = pn533_set_configuration(dev, PN533_CFGITEM_MAX_RETRIES,
+ (u8 *) &max_retries, sizeof(max_retries));
+
+ if (rc) {
+ nfc_dev_err(&dev->interface->dev, "Error on setting MAX_RETRIES"
+ " config");
+ goto free_nfc_dev;
+ }
+
+ return 0;
+
+free_nfc_dev:
+ nfc_free_device(dev->nfc_dev);
+kill_tasklet:
+ tasklet_kill(&dev->tasklet);
+error:
+ kfree(dev->in_frame);
+ usb_free_urb(dev->in_urb);
+ kfree(dev->out_frame);
+ usb_free_urb(dev->out_urb);
+ kfree(dev);
+ return rc;
+}
+
+static void pn533_disconnect(struct usb_interface *interface)
+{
+ struct pn533 *dev;
+
+ dev = usb_get_intfdata(interface);
+ usb_set_intfdata(interface, NULL);
+
+ nfc_unregister_device(dev->nfc_dev);
+ nfc_free_device(dev->nfc_dev);
+
+ usb_kill_urb(dev->in_urb);
+ usb_kill_urb(dev->out_urb);
+
+ tasklet_kill(&dev->tasklet);
+
+ kfree(dev->in_frame);
+ usb_free_urb(dev->in_urb);
+ kfree(dev->out_frame);
+ usb_free_urb(dev->out_urb);
+ kfree(dev);
+
+ nfc_dev_info(&interface->dev, "NXP PN533 NFC device disconnected");
+}
+
+static struct usb_driver pn533_driver = {
+ .name = "pn533",
+ .probe = pn533_probe,
+ .disconnect = pn533_disconnect,
+ .id_table = pn533_table,
+};
+
+module_usb_driver(pn533_driver);
+
+MODULE_AUTHOR("Lauro Ramos Venancio <lauro.venancio@openbossa.org>,"
+ " Aloisio Almeida Jr <aloisio.almeida@openbossa.org>");
+MODULE_DESCRIPTION("PN533 usb driver ver " VERSION);
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");
diff --git a/ap/os/linux/linux-3.4.x/drivers/nfc/pn544.c b/ap/os/linux/linux-3.4.x/drivers/nfc/pn544.c
new file mode 100644
index 0000000..724f65d
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/drivers/nfc/pn544.c
@@ -0,0 +1,893 @@
+/*
+ * Driver for the PN544 NFC chip.
+ *
+ * Copyright (C) Nokia Corporation
+ *
+ * Author: Jari Vanhala <ext-jari.vanhala@nokia.com>
+ * Contact: Matti Aaltonen <matti.j.aaltonen@nokia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/completion.h>
+#include <linux/crc-ccitt.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/miscdevice.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/nfc/pn544.h>
+#include <linux/poll.h>
+#include <linux/regulator/consumer.h>
+#include <linux/serial_core.h> /* for TCGETS */
+#include <linux/slab.h>
+
+#define DRIVER_CARD "PN544 NFC"
+#define DRIVER_DESC "NFC driver for PN544"
+
+static struct i2c_device_id pn544_id_table[] = {
+ { PN544_DRIVER_NAME, 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, pn544_id_table);
+
+#define HCI_MODE 0
+#define FW_MODE 1
+
+enum pn544_state {
+ PN544_ST_COLD,
+ PN544_ST_FW_READY,
+ PN544_ST_READY,
+};
+
+enum pn544_irq {
+ PN544_NONE,
+ PN544_INT,
+};
+
+struct pn544_info {
+ struct miscdevice miscdev;
+ struct i2c_client *i2c_dev;
+ struct regulator_bulk_data regs[3];
+
+ enum pn544_state state;
+ wait_queue_head_t read_wait;
+ loff_t read_offset;
+ enum pn544_irq read_irq;
+ struct mutex read_mutex; /* Serialize read_irq access */
+ struct mutex mutex; /* Serialize info struct access */
+ u8 *buf;
+ size_t buflen;
+};
+
+static const char reg_vdd_io[] = "Vdd_IO";
+static const char reg_vbat[] = "VBat";
+static const char reg_vsim[] = "VSim";
+
+/* sysfs interface */
+static ssize_t pn544_test(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct pn544_info *info = dev_get_drvdata(dev);
+ struct i2c_client *client = info->i2c_dev;
+ struct pn544_nfc_platform_data *pdata = client->dev.platform_data;
+
+ return snprintf(buf, PAGE_SIZE, "%d\n", pdata->test());
+}
+
+static int pn544_enable(struct pn544_info *info, int mode)
+{
+ struct pn544_nfc_platform_data *pdata;
+ struct i2c_client *client = info->i2c_dev;
+
+ int r;
+
+ r = regulator_bulk_enable(ARRAY_SIZE(info->regs), info->regs);
+ if (r < 0)
+ return r;
+
+ pdata = client->dev.platform_data;
+ info->read_irq = PN544_NONE;
+ if (pdata->enable)
+ pdata->enable(mode);
+
+ if (mode) {
+ info->state = PN544_ST_FW_READY;
+ dev_dbg(&client->dev, "now in FW-mode\n");
+ } else {
+ info->state = PN544_ST_READY;
+ dev_dbg(&client->dev, "now in HCI-mode\n");
+ }
+
+ usleep_range(10000, 15000);
+
+ return 0;
+}
+
+static void pn544_disable(struct pn544_info *info)
+{
+ struct pn544_nfc_platform_data *pdata;
+ struct i2c_client *client = info->i2c_dev;
+
+ pdata = client->dev.platform_data;
+ if (pdata->disable)
+ pdata->disable();
+
+ info->state = PN544_ST_COLD;
+
+ dev_dbg(&client->dev, "Now in OFF-mode\n");
+
+ msleep(PN544_RESETVEN_TIME);
+
+ info->read_irq = PN544_NONE;
+ regulator_bulk_disable(ARRAY_SIZE(info->regs), info->regs);
+}
+
+static int check_crc(u8 *buf, int buflen)
+{
+ u8 len;
+ u16 crc;
+
+ len = buf[0] + 1;
+ if (len < 4 || len != buflen || len > PN544_MSG_MAX_SIZE) {
+ pr_err(PN544_DRIVER_NAME
+ ": CRC; corrupt packet len %u (%d)\n", len, buflen);
+ print_hex_dump(KERN_DEBUG, "crc: ", DUMP_PREFIX_NONE,
+ 16, 2, buf, buflen, false);
+ return -EPERM;
+ }
+ crc = crc_ccitt(0xffff, buf, len - 2);
+ crc = ~crc;
+
+ if (buf[len-2] != (crc & 0xff) || buf[len-1] != (crc >> 8)) {
+ pr_err(PN544_DRIVER_NAME ": CRC error 0x%x != 0x%x 0x%x\n",
+ crc, buf[len-1], buf[len-2]);
+
+ print_hex_dump(KERN_DEBUG, "crc: ", DUMP_PREFIX_NONE,
+ 16, 2, buf, buflen, false);
+ return -EPERM;
+ }
+ return 0;
+}
+
+static int pn544_i2c_write(struct i2c_client *client, u8 *buf, int len)
+{
+ int r;
+
+ if (len < 4 || len != (buf[0] + 1)) {
+ dev_err(&client->dev, "%s: Illegal message length: %d\n",
+ __func__, len);
+ return -EINVAL;
+ }
+
+ if (check_crc(buf, len))
+ return -EINVAL;
+
+ usleep_range(3000, 6000);
+
+ r = i2c_master_send(client, buf, len);
+ dev_dbg(&client->dev, "send: %d\n", r);
+
+ if (r == -EREMOTEIO) { /* Retry, chip was in standby */
+ usleep_range(6000, 10000);
+ r = i2c_master_send(client, buf, len);
+ dev_dbg(&client->dev, "send2: %d\n", r);
+ }
+
+ if (r != len)
+ return -EREMOTEIO;
+
+ return r;
+}
+
+static int pn544_i2c_read(struct i2c_client *client, u8 *buf, int buflen)
+{
+ int r;
+ u8 len;
+
+ /*
+ * You could read a packet in one go, but then you'd need to read
+ * max size and rest would be 0xff fill, so we do split reads.
+ */
+ r = i2c_master_recv(client, &len, 1);
+ dev_dbg(&client->dev, "recv1: %d\n", r);
+
+ if (r != 1)
+ return -EREMOTEIO;
+
+ if (len < PN544_LLC_HCI_OVERHEAD)
+ len = PN544_LLC_HCI_OVERHEAD;
+ else if (len > (PN544_MSG_MAX_SIZE - 1))
+ len = PN544_MSG_MAX_SIZE - 1;
+
+ if (1 + len > buflen) /* len+(data+crc16) */
+ return -EMSGSIZE;
+
+ buf[0] = len;
+
+ r = i2c_master_recv(client, buf + 1, len);
+ dev_dbg(&client->dev, "recv2: %d\n", r);
+
+ if (r != len)
+ return -EREMOTEIO;
+
+ usleep_range(3000, 6000);
+
+ return r + 1;
+}
+
+static int pn544_fw_write(struct i2c_client *client, u8 *buf, int len)
+{
+ int r;
+
+ dev_dbg(&client->dev, "%s\n", __func__);
+
+ if (len < PN544_FW_HEADER_SIZE ||
+ (PN544_FW_HEADER_SIZE + (buf[1] << 8) + buf[2]) != len)
+ return -EINVAL;
+
+ r = i2c_master_send(client, buf, len);
+ dev_dbg(&client->dev, "fw send: %d\n", r);
+
+ if (r == -EREMOTEIO) { /* Retry, chip was in standby */
+ usleep_range(6000, 10000);
+ r = i2c_master_send(client, buf, len);
+ dev_dbg(&client->dev, "fw send2: %d\n", r);
+ }
+
+ if (r != len)
+ return -EREMOTEIO;
+
+ return r;
+}
+
+static int pn544_fw_read(struct i2c_client *client, u8 *buf, int buflen)
+{
+ int r, len;
+
+ if (buflen < PN544_FW_HEADER_SIZE)
+ return -EINVAL;
+
+ r = i2c_master_recv(client, buf, PN544_FW_HEADER_SIZE);
+ dev_dbg(&client->dev, "FW recv1: %d\n", r);
+
+ if (r < 0)
+ return r;
+
+ if (r < PN544_FW_HEADER_SIZE)
+ return -EINVAL;
+
+ len = (buf[1] << 8) + buf[2];
+ if (len == 0) /* just header, no additional data */
+ return r;
+
+ if (len > buflen - PN544_FW_HEADER_SIZE)
+ return -EMSGSIZE;
+
+ r = i2c_master_recv(client, buf + PN544_FW_HEADER_SIZE, len);
+ dev_dbg(&client->dev, "fw recv2: %d\n", r);
+
+ if (r != len)
+ return -EINVAL;
+
+ return r + PN544_FW_HEADER_SIZE;
+}
+
+static irqreturn_t pn544_irq_thread_fn(int irq, void *dev_id)
+{
+ struct pn544_info *info = dev_id;
+ struct i2c_client *client = info->i2c_dev;
+
+ BUG_ON(!info);
+ BUG_ON(irq != info->i2c_dev->irq);
+
+ dev_dbg(&client->dev, "IRQ\n");
+
+ mutex_lock(&info->read_mutex);
+ info->read_irq = PN544_INT;
+ mutex_unlock(&info->read_mutex);
+
+ wake_up_interruptible(&info->read_wait);
+
+ return IRQ_HANDLED;
+}
+
+static enum pn544_irq pn544_irq_state(struct pn544_info *info)
+{
+ enum pn544_irq irq;
+
+ mutex_lock(&info->read_mutex);
+ irq = info->read_irq;
+ mutex_unlock(&info->read_mutex);
+ /*
+ * XXX: should we check GPIO-line status directly?
+ * return pdata->irq_status() ? PN544_INT : PN544_NONE;
+ */
+
+ return irq;
+}
+
+static ssize_t pn544_read(struct file *file, char __user *buf,
+ size_t count, loff_t *offset)
+{
+ struct pn544_info *info = container_of(file->private_data,
+ struct pn544_info, miscdev);
+ struct i2c_client *client = info->i2c_dev;
+ enum pn544_irq irq;
+ size_t len;
+ int r = 0;
+
+ dev_dbg(&client->dev, "%s: info: %p, count: %zu\n", __func__,
+ info, count);
+
+ mutex_lock(&info->mutex);
+
+ if (info->state == PN544_ST_COLD) {
+ r = -ENODEV;
+ goto out;
+ }
+
+ irq = pn544_irq_state(info);
+ if (irq == PN544_NONE) {
+ if (file->f_flags & O_NONBLOCK) {
+ r = -EAGAIN;
+ goto out;
+ }
+
+ if (wait_event_interruptible(info->read_wait,
+ (info->read_irq == PN544_INT))) {
+ r = -ERESTARTSYS;
+ goto out;
+ }
+ }
+
+ if (info->state == PN544_ST_FW_READY) {
+ len = min(count, info->buflen);
+
+ mutex_lock(&info->read_mutex);
+ r = pn544_fw_read(info->i2c_dev, info->buf, len);
+ info->read_irq = PN544_NONE;
+ mutex_unlock(&info->read_mutex);
+
+ if (r < 0) {
+ dev_err(&info->i2c_dev->dev, "FW read failed: %d\n", r);
+ goto out;
+ }
+
+ print_hex_dump(KERN_DEBUG, "FW read: ", DUMP_PREFIX_NONE,
+ 16, 2, info->buf, r, false);
+
+ *offset += r;
+ if (copy_to_user(buf, info->buf, r)) {
+ r = -EFAULT;
+ goto out;
+ }
+ } else {
+ len = min(count, info->buflen);
+
+ mutex_lock(&info->read_mutex);
+ r = pn544_i2c_read(info->i2c_dev, info->buf, len);
+ info->read_irq = PN544_NONE;
+ mutex_unlock(&info->read_mutex);
+
+ if (r < 0) {
+ dev_err(&info->i2c_dev->dev, "read failed (%d)\n", r);
+ goto out;
+ }
+ print_hex_dump(KERN_DEBUG, "read: ", DUMP_PREFIX_NONE,
+ 16, 2, info->buf, r, false);
+
+ *offset += r;
+ if (copy_to_user(buf, info->buf, r)) {
+ r = -EFAULT;
+ goto out;
+ }
+ }
+
+out:
+ mutex_unlock(&info->mutex);
+
+ return r;
+}
+
+static unsigned int pn544_poll(struct file *file, poll_table *wait)
+{
+ struct pn544_info *info = container_of(file->private_data,
+ struct pn544_info, miscdev);
+ struct i2c_client *client = info->i2c_dev;
+ int r = 0;
+
+ dev_dbg(&client->dev, "%s: info: %p\n", __func__, info);
+
+ mutex_lock(&info->mutex);
+
+ if (info->state == PN544_ST_COLD) {
+ r = -ENODEV;
+ goto out;
+ }
+
+ poll_wait(file, &info->read_wait, wait);
+
+ if (pn544_irq_state(info) == PN544_INT) {
+ r = POLLIN | POLLRDNORM;
+ goto out;
+ }
+out:
+ mutex_unlock(&info->mutex);
+
+ return r;
+}
+
+static ssize_t pn544_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
+{
+ struct pn544_info *info = container_of(file->private_data,
+ struct pn544_info, miscdev);
+ struct i2c_client *client = info->i2c_dev;
+ ssize_t len;
+ int r;
+
+ dev_dbg(&client->dev, "%s: info: %p, count %zu\n", __func__,
+ info, count);
+
+ mutex_lock(&info->mutex);
+
+ if (info->state == PN544_ST_COLD) {
+ r = -ENODEV;
+ goto out;
+ }
+
+ /*
+ * XXX: should we detect rset-writes and clean possible
+ * read_irq state
+ */
+ if (info->state == PN544_ST_FW_READY) {
+ size_t fw_len;
+
+ if (count < PN544_FW_HEADER_SIZE) {
+ r = -EINVAL;
+ goto out;
+ }
+
+ len = min(count, info->buflen);
+ if (copy_from_user(info->buf, buf, len)) {
+ r = -EFAULT;
+ goto out;
+ }
+
+ print_hex_dump(KERN_DEBUG, "FW write: ", DUMP_PREFIX_NONE,
+ 16, 2, info->buf, len, false);
+
+ fw_len = PN544_FW_HEADER_SIZE + (info->buf[1] << 8) +
+ info->buf[2];
+
+ if (len > fw_len) /* 1 msg at a time */
+ len = fw_len;
+
+ r = pn544_fw_write(info->i2c_dev, info->buf, len);
+ } else {
+ if (count < PN544_LLC_MIN_SIZE) {
+ r = -EINVAL;
+ goto out;
+ }
+
+ len = min(count, info->buflen);
+ if (copy_from_user(info->buf, buf, len)) {
+ r = -EFAULT;
+ goto out;
+ }
+
+ print_hex_dump(KERN_DEBUG, "write: ", DUMP_PREFIX_NONE,
+ 16, 2, info->buf, len, false);
+
+ if (len > (info->buf[0] + 1)) /* 1 msg at a time */
+ len = info->buf[0] + 1;
+
+ r = pn544_i2c_write(info->i2c_dev, info->buf, len);
+ }
+out:
+ mutex_unlock(&info->mutex);
+
+ return r;
+
+}
+
+static long pn544_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ struct pn544_info *info = container_of(file->private_data,
+ struct pn544_info, miscdev);
+ struct i2c_client *client = info->i2c_dev;
+ struct pn544_nfc_platform_data *pdata;
+ unsigned int val;
+ int r = 0;
+
+ dev_dbg(&client->dev, "%s: info: %p, cmd: 0x%x\n", __func__, info, cmd);
+
+ mutex_lock(&info->mutex);
+
+ if (info->state == PN544_ST_COLD) {
+ r = -ENODEV;
+ goto out;
+ }
+
+ pdata = info->i2c_dev->dev.platform_data;
+ switch (cmd) {
+ case PN544_GET_FW_MODE:
+ dev_dbg(&client->dev, "%s: PN544_GET_FW_MODE\n", __func__);
+
+ val = (info->state == PN544_ST_FW_READY);
+ if (copy_to_user((void __user *)arg, &val, sizeof(val))) {
+ r = -EFAULT;
+ goto out;
+ }
+
+ break;
+
+ case PN544_SET_FW_MODE:
+ dev_dbg(&client->dev, "%s: PN544_SET_FW_MODE\n", __func__);
+
+ if (copy_from_user(&val, (void __user *)arg, sizeof(val))) {
+ r = -EFAULT;
+ goto out;
+ }
+
+ if (val) {
+ if (info->state == PN544_ST_FW_READY)
+ break;
+
+ pn544_disable(info);
+ r = pn544_enable(info, FW_MODE);
+ if (r < 0)
+ goto out;
+ } else {
+ if (info->state == PN544_ST_READY)
+ break;
+ pn544_disable(info);
+ r = pn544_enable(info, HCI_MODE);
+ if (r < 0)
+ goto out;
+ }
+ file->f_pos = info->read_offset;
+ break;
+
+ case TCGETS:
+ dev_dbg(&client->dev, "%s: TCGETS\n", __func__);
+
+ r = -ENOIOCTLCMD;
+ break;
+
+ default:
+ dev_err(&client->dev, "Unknown ioctl 0x%x\n", cmd);
+ r = -ENOIOCTLCMD;
+ break;
+ }
+
+out:
+ mutex_unlock(&info->mutex);
+
+ return r;
+}
+
+static int pn544_open(struct inode *inode, struct file *file)
+{
+ struct pn544_info *info = container_of(file->private_data,
+ struct pn544_info, miscdev);
+ struct i2c_client *client = info->i2c_dev;
+ int r = 0;
+
+ dev_dbg(&client->dev, "%s: info: %p, client %p\n", __func__,
+ info, info->i2c_dev);
+
+ mutex_lock(&info->mutex);
+
+ /*
+ * Only 1 at a time.
+ * XXX: maybe user (counter) would work better
+ */
+ if (info->state != PN544_ST_COLD) {
+ r = -EBUSY;
+ goto out;
+ }
+
+ file->f_pos = info->read_offset;
+ r = pn544_enable(info, HCI_MODE);
+
+out:
+ mutex_unlock(&info->mutex);
+ return r;
+}
+
+static int pn544_close(struct inode *inode, struct file *file)
+{
+ struct pn544_info *info = container_of(file->private_data,
+ struct pn544_info, miscdev);
+ struct i2c_client *client = info->i2c_dev;
+
+ dev_dbg(&client->dev, "%s: info: %p, client %p\n",
+ __func__, info, info->i2c_dev);
+
+ mutex_lock(&info->mutex);
+ pn544_disable(info);
+ mutex_unlock(&info->mutex);
+
+ return 0;
+}
+
+static const struct file_operations pn544_fops = {
+ .owner = THIS_MODULE,
+ .llseek = no_llseek,
+ .read = pn544_read,
+ .write = pn544_write,
+ .poll = pn544_poll,
+ .open = pn544_open,
+ .release = pn544_close,
+ .unlocked_ioctl = pn544_ioctl,
+};
+
+#ifdef CONFIG_PM
+static int pn544_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct pn544_info *info;
+ int r = 0;
+
+ dev_info(&client->dev, "***\n%s: client %p\n***\n", __func__, client);
+
+ info = i2c_get_clientdata(client);
+ dev_info(&client->dev, "%s: info: %p, client %p\n", __func__,
+ info, client);
+
+ mutex_lock(&info->mutex);
+
+ switch (info->state) {
+ case PN544_ST_FW_READY:
+ /* Do not suspend while upgrading FW, please! */
+ r = -EPERM;
+ break;
+
+ case PN544_ST_READY:
+ /*
+ * CHECK: Device should be in standby-mode. No way to check?
+ * Allowing low power mode for the regulator is potentially
+ * dangerous if pn544 does not go to suspension.
+ */
+ break;
+
+ case PN544_ST_COLD:
+ break;
+ };
+
+ mutex_unlock(&info->mutex);
+ return r;
+}
+
+static int pn544_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct pn544_info *info = i2c_get_clientdata(client);
+ int r = 0;
+
+ dev_dbg(&client->dev, "%s: info: %p, client %p\n", __func__,
+ info, client);
+
+ mutex_lock(&info->mutex);
+
+ switch (info->state) {
+ case PN544_ST_READY:
+ /*
+ * CHECK: If regulator low power mode is allowed in
+ * pn544_suspend, we should go back to normal mode
+ * here.
+ */
+ break;
+
+ case PN544_ST_COLD:
+ break;
+
+ case PN544_ST_FW_READY:
+ break;
+ };
+
+ mutex_unlock(&info->mutex);
+
+ return r;
+}
+
+static SIMPLE_DEV_PM_OPS(pn544_pm_ops, pn544_suspend, pn544_resume);
+#endif
+
+static struct device_attribute pn544_attr =
+ __ATTR(nfc_test, S_IRUGO, pn544_test, NULL);
+
+static int __devinit pn544_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct pn544_info *info;
+ struct pn544_nfc_platform_data *pdata;
+ int r = 0;
+
+ dev_dbg(&client->dev, "%s\n", __func__);
+ dev_dbg(&client->dev, "IRQ: %d\n", client->irq);
+
+ /* private data allocation */
+ info = kzalloc(sizeof(struct pn544_info), GFP_KERNEL);
+ if (!info) {
+ dev_err(&client->dev,
+ "Cannot allocate memory for pn544_info.\n");
+ r = -ENOMEM;
+ goto err_info_alloc;
+ }
+
+ info->buflen = max(PN544_MSG_MAX_SIZE, PN544_MAX_I2C_TRANSFER);
+ info->buf = kzalloc(info->buflen, GFP_KERNEL);
+ if (!info->buf) {
+ dev_err(&client->dev,
+ "Cannot allocate memory for pn544_info->buf.\n");
+ r = -ENOMEM;
+ goto err_buf_alloc;
+ }
+
+ info->regs[0].supply = reg_vdd_io;
+ info->regs[1].supply = reg_vbat;
+ info->regs[2].supply = reg_vsim;
+ r = regulator_bulk_get(&client->dev, ARRAY_SIZE(info->regs),
+ info->regs);
+ if (r < 0)
+ goto err_kmalloc;
+
+ info->i2c_dev = client;
+ info->state = PN544_ST_COLD;
+ info->read_irq = PN544_NONE;
+ mutex_init(&info->read_mutex);
+ mutex_init(&info->mutex);
+ init_waitqueue_head(&info->read_wait);
+ i2c_set_clientdata(client, info);
+ pdata = client->dev.platform_data;
+ if (!pdata) {
+ dev_err(&client->dev, "No platform data\n");
+ r = -EINVAL;
+ goto err_reg;
+ }
+
+ if (!pdata->request_resources) {
+ dev_err(&client->dev, "request_resources() missing\n");
+ r = -EINVAL;
+ goto err_reg;
+ }
+
+ r = pdata->request_resources(client);
+ if (r) {
+ dev_err(&client->dev, "Cannot get platform resources\n");
+ goto err_reg;
+ }
+
+ r = request_threaded_irq(client->irq, NULL, pn544_irq_thread_fn,
+ IRQF_TRIGGER_RISING, PN544_DRIVER_NAME,
+ info);
+ if (r < 0) {
+ dev_err(&client->dev, "Unable to register IRQ handler\n");
+ goto err_res;
+ }
+
+ /* If we don't have the test we don't need the sysfs file */
+ if (pdata->test) {
+ r = device_create_file(&client->dev, &pn544_attr);
+ if (r) {
+ dev_err(&client->dev,
+ "sysfs registration failed, error %d\n", r);
+ goto err_irq;
+ }
+ }
+
+ info->miscdev.minor = MISC_DYNAMIC_MINOR;
+ info->miscdev.name = PN544_DRIVER_NAME;
+ info->miscdev.fops = &pn544_fops;
+ info->miscdev.parent = &client->dev;
+ r = misc_register(&info->miscdev);
+ if (r < 0) {
+ dev_err(&client->dev, "Device registration failed\n");
+ goto err_sysfs;
+ }
+
+ dev_dbg(&client->dev, "%s: info: %p, pdata %p, client %p\n",
+ __func__, info, pdata, client);
+
+ return 0;
+
+err_sysfs:
+ if (pdata->test)
+ device_remove_file(&client->dev, &pn544_attr);
+err_irq:
+ free_irq(client->irq, info);
+err_res:
+ if (pdata->free_resources)
+ pdata->free_resources();
+err_reg:
+ regulator_bulk_free(ARRAY_SIZE(info->regs), info->regs);
+err_kmalloc:
+ kfree(info->buf);
+err_buf_alloc:
+ kfree(info);
+err_info_alloc:
+ return r;
+}
+
+static __devexit int pn544_remove(struct i2c_client *client)
+{
+ struct pn544_info *info = i2c_get_clientdata(client);
+ struct pn544_nfc_platform_data *pdata = client->dev.platform_data;
+
+ dev_dbg(&client->dev, "%s\n", __func__);
+
+ misc_deregister(&info->miscdev);
+ if (pdata->test)
+ device_remove_file(&client->dev, &pn544_attr);
+
+ if (info->state != PN544_ST_COLD) {
+ if (pdata->disable)
+ pdata->disable();
+
+ info->read_irq = PN544_NONE;
+ }
+
+ free_irq(client->irq, info);
+ if (pdata->free_resources)
+ pdata->free_resources();
+
+ regulator_bulk_free(ARRAY_SIZE(info->regs), info->regs);
+ kfree(info->buf);
+ kfree(info);
+
+ return 0;
+}
+
+static struct i2c_driver pn544_driver = {
+ .driver = {
+ .name = PN544_DRIVER_NAME,
+#ifdef CONFIG_PM
+ .pm = &pn544_pm_ops,
+#endif
+ },
+ .probe = pn544_probe,
+ .id_table = pn544_id_table,
+ .remove = __devexit_p(pn544_remove),
+};
+
+static int __init pn544_init(void)
+{
+ int r;
+
+ pr_debug(DRIVER_DESC ": %s\n", __func__);
+
+ r = i2c_add_driver(&pn544_driver);
+ if (r) {
+ pr_err(PN544_DRIVER_NAME ": driver registration failed\n");
+ return r;
+ }
+
+ return 0;
+}
+
+static void __exit pn544_exit(void)
+{
+ i2c_del_driver(&pn544_driver);
+ pr_info(DRIVER_DESC ", Exiting.\n");
+}
+
+module_init(pn544_init);
+module_exit(pn544_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION(DRIVER_DESC);