# Makefile for nfc devices
#
-obj-$(CONFIG_PN544_HCI_NFC) += pn544_hci.o
+obj-$(CONFIG_PN544_HCI_NFC) += pn544/
obj-$(CONFIG_NFC_PN533) += pn533.o
obj-$(CONFIG_NFC_WILINK) += nfcwilink.o
--- /dev/null
+#
+# Makefile for PN544 HCI based NFC driver
+#
+
+obj-$(CONFIG_PN544_HCI_NFC) += pn544_i2c.o
+
+pn544_i2c-y := pn544.o i2c.o
--- /dev/null
+/*
+ * I2C Link Layer for PN544 HCI based 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, write to the
+ * Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <linux/crc-ccitt.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/gpio.h>
+#include <linux/miscdevice.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+
+#include <linux/nfc/pn544.h>
+
+#include <net/nfc/hci.h>
+#include <net/nfc/llc.h>
+
+#include "pn544.h"
+
+#define PN544_I2C_FRAME_HEADROOM 1
+#define PN544_I2C_FRAME_TAILROOM 2
+
+/* framing in HCI mode */
+#define PN544_HCI_I2C_LLC_LEN 1
+#define PN544_HCI_I2C_LLC_CRC 2
+#define PN544_HCI_I2C_LLC_LEN_CRC (PN544_HCI_I2C_LLC_LEN + \
+ PN544_HCI_I2C_LLC_CRC)
+#define PN544_HCI_I2C_LLC_MIN_SIZE (1 + PN544_HCI_I2C_LLC_LEN_CRC)
+#define PN544_HCI_I2C_LLC_MAX_PAYLOAD 29
+#define PN544_HCI_I2C_LLC_MAX_SIZE (PN544_HCI_I2C_LLC_LEN_CRC + 1 + \
+ PN544_HCI_I2C_LLC_MAX_PAYLOAD)
+
+static struct i2c_device_id pn544_hci_i2c_id_table[] = {
+ {"pn544", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, pn544_hci_i2c_id_table);
+
+#define PN544_HCI_I2C_DRIVER_NAME "pn544_hci_i2c"
+
+struct pn544_i2c_phy {
+ struct i2c_client *i2c_dev;
+ struct nfc_hci_dev *hdev;
+
+ unsigned int gpio_en;
+ unsigned int gpio_irq;
+ unsigned int gpio_fw;
+ unsigned int en_polarity;
+
+ int powered;
+
+ int hard_fault; /*
+ * < 0 if hardware error occured (e.g. i2c err)
+ * and prevents normal operation.
+ */
+};
+
+#define I2C_DUMP_SKB(info, skb) \
+do { \
+ pr_debug("%s:\n", info); \
+ print_hex_dump(KERN_DEBUG, "i2c: ", DUMP_PREFIX_OFFSET, \
+ 16, 1, (skb)->data, (skb)->len, 0); \
+} while (0)
+
+static void pn544_hci_i2c_platform_init(struct pn544_i2c_phy *phy)
+{
+ int polarity, retry, ret;
+ char rset_cmd[] = { 0x05, 0xF9, 0x04, 0x00, 0xC3, 0xE5 };
+ int count = sizeof(rset_cmd);
+
+ pr_info(DRIVER_DESC ": %s\n", __func__);
+ dev_info(&phy->i2c_dev->dev, "Detecting nfc_en polarity\n");
+
+ /* Disable fw download */
+ gpio_set_value(phy->gpio_fw, 0);
+
+ for (polarity = 0; polarity < 2; polarity++) {
+ phy->en_polarity = polarity;
+ retry = 3;
+ while (retry--) {
+ /* power off */
+ gpio_set_value(phy->gpio_en, !phy->en_polarity);
+ usleep_range(10000, 15000);
+
+ /* power on */
+ gpio_set_value(phy->gpio_en, phy->en_polarity);
+ usleep_range(10000, 15000);
+
+ /* send reset */
+ dev_dbg(&phy->i2c_dev->dev, "Sending reset cmd\n");
+ ret = i2c_master_send(phy->i2c_dev, rset_cmd, count);
+ if (ret == count) {
+ dev_info(&phy->i2c_dev->dev,
+ "nfc_en polarity : active %s\n",
+ (polarity == 0 ? "low" : "high"));
+ goto out;
+ }
+ }
+ }
+
+ dev_err(&phy->i2c_dev->dev,
+ "Could not detect nfc_en polarity, fallback to active high\n");
+
+out:
+ gpio_set_value(phy->gpio_en, !phy->en_polarity);
+}
+
+static int pn544_hci_i2c_enable(void *phy_id)
+{
+ struct pn544_i2c_phy *phy = phy_id;
+
+ pr_info(DRIVER_DESC ": %s\n", __func__);
+
+ gpio_set_value(phy->gpio_fw, 0);
+ gpio_set_value(phy->gpio_en, phy->en_polarity);
+ usleep_range(10000, 15000);
+
+ phy->powered = 1;
+
+ return 0;
+}
+
+static void pn544_hci_i2c_disable(void *phy_id)
+{
+ struct pn544_i2c_phy *phy = phy_id;
+
+ pr_info(DRIVER_DESC ": %s\n", __func__);
+
+ gpio_set_value(phy->gpio_fw, 0);
+ gpio_set_value(phy->gpio_en, !phy->en_polarity);
+ usleep_range(10000, 15000);
+
+ gpio_set_value(phy->gpio_en, phy->en_polarity);
+ usleep_range(10000, 15000);
+
+ gpio_set_value(phy->gpio_en, !phy->en_polarity);
+ usleep_range(10000, 15000);
+
+ phy->powered = 0;
+}
+
+static void pn544_hci_i2c_add_len_crc(struct sk_buff *skb)
+{
+ u16 crc;
+ int len;
+
+ len = skb->len + 2;
+ *skb_push(skb, 1) = len;
+
+ crc = crc_ccitt(0xffff, skb->data, skb->len);
+ crc = ~crc;
+ *skb_put(skb, 1) = crc & 0xff;
+ *skb_put(skb, 1) = crc >> 8;
+}
+
+static void pn544_hci_i2c_remove_len_crc(struct sk_buff *skb)
+{
+ skb_pull(skb, PN544_I2C_FRAME_HEADROOM);
+ skb_trim(skb, PN544_I2C_FRAME_TAILROOM);
+}
+
+/*
+ * Writing a frame must not return the number of written bytes.
+ * It must return either zero for success, or <0 for error.
+ * In addition, it must not alter the skb
+ */
+static int pn544_hci_i2c_write(void *phy_id, struct sk_buff *skb)
+{
+ int r;
+ struct pn544_i2c_phy *phy = phy_id;
+ struct i2c_client *client = phy->i2c_dev;
+
+ if (phy->hard_fault != 0)
+ return phy->hard_fault;
+
+ usleep_range(3000, 6000);
+
+ pn544_hci_i2c_add_len_crc(skb);
+
+ I2C_DUMP_SKB("i2c frame written", skb);
+
+ r = i2c_master_send(client, skb->data, skb->len);
+
+ if (r == -EREMOTEIO) { /* Retry, chip was in standby */
+ usleep_range(6000, 10000);
+ r = i2c_master_send(client, skb->data, skb->len);
+ }
+
+ if (r >= 0) {
+ if (r != skb->len)
+ r = -EREMOTEIO;
+ else
+ r = 0;
+ }
+
+ pn544_hci_i2c_remove_len_crc(skb);
+
+ return r;
+}
+
+static int check_crc(u8 *buf, int buflen)
+{
+ int len;
+ u16 crc;
+
+ len = buf[0] + 1;
+ crc = crc_ccitt(0xffff, buf, len - 2);
+ crc = ~crc;
+
+ if (buf[len - 2] != (crc & 0xff) || buf[len - 1] != (crc >> 8)) {
+ pr_err(PN544_HCI_I2C_DRIVER_NAME
+ ": CRC error 0x%x != 0x%x 0x%x\n",
+ crc, buf[len - 1], buf[len - 2]);
+
+ pr_info(DRIVER_DESC ": %s : BAD CRC\n", __func__);
+ print_hex_dump(KERN_DEBUG, "crc: ", DUMP_PREFIX_NONE,
+ 16, 2, buf, buflen, false);
+ return -EPERM;
+ }
+ return 0;
+}
+
+/*
+ * Reads an shdlc frame and returns it in a newly allocated sk_buff. Guarantees
+ * that i2c bus will be flushed and that next read will start on a new frame.
+ * returned skb contains only LLC header and payload.
+ * returns:
+ * -EREMOTEIO : i2c read error (fatal)
+ * -EBADMSG : frame was incorrect and discarded
+ * -ENOMEM : cannot allocate skb, frame dropped
+ */
+static int pn544_hci_i2c_read(struct pn544_i2c_phy *phy, struct sk_buff **skb)
+{
+ int r;
+ u8 len;
+ u8 tmp[PN544_HCI_I2C_LLC_MAX_SIZE - 1];
+ struct i2c_client *client = phy->i2c_dev;
+
+ r = i2c_master_recv(client, &len, 1);
+ if (r != 1) {
+ dev_err(&client->dev, "cannot read len byte\n");
+ return -EREMOTEIO;
+ }
+
+ if ((len < (PN544_HCI_I2C_LLC_MIN_SIZE - 1)) ||
+ (len > (PN544_HCI_I2C_LLC_MAX_SIZE - 1))) {
+ dev_err(&client->dev, "invalid len byte\n");
+ r = -EBADMSG;
+ goto flush;
+ }
+
+ *skb = alloc_skb(1 + len, GFP_KERNEL);
+ if (*skb == NULL) {
+ r = -ENOMEM;
+ goto flush;
+ }
+
+ *skb_put(*skb, 1) = len;
+
+ r = i2c_master_recv(client, skb_put(*skb, len), len);
+ if (r != len) {
+ kfree_skb(*skb);
+ return -EREMOTEIO;
+ }
+
+ I2C_DUMP_SKB("i2c frame read", *skb);
+
+ r = check_crc((*skb)->data, (*skb)->len);
+ if (r != 0) {
+ kfree_skb(*skb);
+ r = -EBADMSG;
+ goto flush;
+ }
+
+ skb_pull(*skb, 1);
+ skb_trim(*skb, (*skb)->len - 2);
+
+ usleep_range(3000, 6000);
+
+ return 0;
+
+flush:
+ if (i2c_master_recv(client, tmp, sizeof(tmp)) < 0)
+ r = -EREMOTEIO;
+
+ usleep_range(3000, 6000);
+
+ return r;
+}
+
+/*
+ * Reads an shdlc frame from the chip. This is not as straightforward as it
+ * seems. There are cases where we could loose the frame start synchronization.
+ * The frame format is len-data-crc, and corruption can occur anywhere while
+ * transiting on i2c bus, such that we could read an invalid len.
+ * In order to recover synchronization with the next frame, we must be sure
+ * to read the real amount of data without using the len byte. We do this by
+ * assuming the following:
+ * - the chip will always present only one single complete frame on the bus
+ * before triggering the interrupt
+ * - the chip will not present a new frame until we have completely read
+ * the previous one (or until we have handled the interrupt).
+ * The tricky case is when we read a corrupted len that is less than the real
+ * len. We must detect this here in order to determine that we need to flush
+ * the bus. This is the reason why we check the crc here.
+ */
+static irqreturn_t pn544_hci_i2c_irq_thread_fn(int irq, void *phy_id)
+{
+ struct pn544_i2c_phy *phy = phy_id;
+ struct i2c_client *client;
+ struct sk_buff *skb = NULL;
+ int r;
+
+ if (!phy || irq != phy->i2c_dev->irq) {
+ WARN_ON_ONCE(1);
+ return IRQ_NONE;
+ }
+
+ client = phy->i2c_dev;
+ dev_dbg(&client->dev, "IRQ\n");
+
+ if (phy->hard_fault != 0)
+ return IRQ_HANDLED;
+
+ r = pn544_hci_i2c_read(phy, &skb);
+ if (r == -EREMOTEIO) {
+ phy->hard_fault = r;
+
+ nfc_hci_recv_frame(phy->hdev, NULL);
+
+ return IRQ_HANDLED;
+ } else if ((r == -ENOMEM) || (r == -EBADMSG)) {
+ return IRQ_HANDLED;
+ }
+
+ nfc_hci_recv_frame(phy->hdev, skb);
+
+ return IRQ_HANDLED;
+}
+
+static struct nfc_phy_ops i2c_phy_ops = {
+ .write = pn544_hci_i2c_write,
+ .enable = pn544_hci_i2c_enable,
+ .disable = pn544_hci_i2c_disable,
+};
+
+static int __devinit pn544_hci_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct pn544_i2c_phy *phy;
+ 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);
+
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ dev_err(&client->dev, "Need I2C_FUNC_I2C\n");
+ return -ENODEV;
+ }
+
+ phy = kzalloc(sizeof(struct pn544_i2c_phy), GFP_KERNEL);
+ if (!phy) {
+ dev_err(&client->dev,
+ "Cannot allocate memory for pn544 i2c phy.\n");
+ r = -ENOMEM;
+ goto err_phy_alloc;
+ }
+
+ phy->i2c_dev = client;
+ i2c_set_clientdata(client, phy);
+
+ pdata = client->dev.platform_data;
+ if (pdata == NULL) {
+ dev_err(&client->dev, "No platform data\n");
+ r = -EINVAL;
+ goto err_pdata;
+ }
+
+ if (pdata->request_resources == NULL) {
+ dev_err(&client->dev, "request_resources() missing\n");
+ r = -EINVAL;
+ goto err_pdata;
+ }
+
+ r = pdata->request_resources(client);
+ if (r) {
+ dev_err(&client->dev, "Cannot get platform resources\n");
+ goto err_pdata;
+ }
+
+ phy->gpio_en = pdata->get_gpio(NFC_GPIO_ENABLE);
+ phy->gpio_fw = pdata->get_gpio(NFC_GPIO_FW_RESET);
+ phy->gpio_irq = pdata->get_gpio(NFC_GPIO_IRQ);
+
+ pn544_hci_i2c_platform_init(phy);
+
+ r = request_threaded_irq(client->irq, NULL, pn544_hci_i2c_irq_thread_fn,
+ IRQF_TRIGGER_RISING | IRQF_ONESHOT,
+ PN544_HCI_I2C_DRIVER_NAME, phy);
+ if (r < 0) {
+ dev_err(&client->dev, "Unable to register IRQ handler\n");
+ goto err_rti;
+ }
+
+ r = pn544_hci_probe(phy, &i2c_phy_ops, LLC_SHDLC_NAME,
+ PN544_I2C_FRAME_HEADROOM, PN544_I2C_FRAME_TAILROOM,
+ PN544_HCI_I2C_LLC_MAX_PAYLOAD, &phy->hdev);
+ if (r < 0)
+ goto err_hci;
+
+ return 0;
+
+err_hci:
+ free_irq(client->irq, phy);
+
+err_rti:
+ if (pdata->free_resources != NULL)
+ pdata->free_resources();
+
+err_pdata:
+ kfree(phy);
+
+err_phy_alloc:
+ return r;
+}
+
+static __devexit int pn544_hci_i2c_remove(struct i2c_client *client)
+{
+ struct pn544_i2c_phy *phy = i2c_get_clientdata(client);
+ struct pn544_nfc_platform_data *pdata = client->dev.platform_data;
+
+ dev_dbg(&client->dev, "%s\n", __func__);
+
+ pn544_hci_remove(phy->hdev);
+
+ if (phy->powered)
+ pn544_hci_i2c_disable(phy);
+
+ free_irq(client->irq, phy);
+ if (pdata->free_resources)
+ pdata->free_resources();
+
+ kfree(phy);
+
+ return 0;
+}
+
+static struct i2c_driver pn544_hci_i2c_driver = {
+ .driver = {
+ .name = PN544_HCI_I2C_DRIVER_NAME,
+ },
+ .probe = pn544_hci_i2c_probe,
+ .id_table = pn544_hci_i2c_id_table,
+ .remove = __devexit_p(pn544_hci_i2c_remove),
+};
+
+static int __init pn544_hci_i2c_init(void)
+{
+ int r;
+
+ pr_debug(DRIVER_DESC ": %s\n", __func__);
+
+ r = i2c_add_driver(&pn544_hci_i2c_driver);
+ if (r) {
+ pr_err(PN544_HCI_I2C_DRIVER_NAME
+ ": driver registration failed\n");
+ return r;
+ }
+
+ return 0;
+}
+
+static void __exit pn544_hci_i2c_exit(void)
+{
+ i2c_del_driver(&pn544_hci_i2c_driver);
+}
+
+module_init(pn544_hci_i2c_init);
+module_exit(pn544_hci_i2c_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION(DRIVER_DESC);
--- /dev/null
+/*
+ * HCI based Driver for NXP PN544 NFC Chip
+ *
+ * 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, write to the
+ * Free Software Foundation, Inc.,
+ * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#include <linux/delay.h>
+#include <linux/slab.h>
+
+#include <linux/nfc.h>
+#include <net/nfc/hci.h>
+#include <net/nfc/llc.h>
+
+#include "pn544.h"
+
+/* Timing restrictions (ms) */
+#define PN544_HCI_RESETVEN_TIME 30
+
+#define HCI_MODE 0
+#define FW_MODE 1
+
+enum pn544_state {
+ PN544_ST_COLD,
+ PN544_ST_FW_READY,
+ PN544_ST_READY,
+};
+
+#define FULL_VERSION_LEN 11
+
+/* Proprietary commands */
+#define PN544_WRITE 0x3f
+
+/* Proprietary gates, events, commands and registers */
+
+/* NFC_HCI_RF_READER_A_GATE additional registers and commands */
+#define PN544_RF_READER_A_AUTO_ACTIVATION 0x10
+#define PN544_RF_READER_A_CMD_CONTINUE_ACTIVATION 0x12
+#define PN544_MIFARE_CMD 0x21
+
+/* Commands that apply to all RF readers */
+#define PN544_RF_READER_CMD_PRESENCE_CHECK 0x30
+#define PN544_RF_READER_CMD_ACTIVATE_NEXT 0x32
+
+/* NFC_HCI_ID_MGMT_GATE additional registers */
+#define PN544_ID_MGMT_FULL_VERSION_SW 0x10
+
+#define PN544_RF_READER_ISO15693_GATE 0x12
+
+#define PN544_RF_READER_F_GATE 0x14
+#define PN544_FELICA_ID 0x04
+#define PN544_FELICA_RAW 0x20
+
+#define PN544_RF_READER_JEWEL_GATE 0x15
+#define PN544_JEWEL_RAW_CMD 0x23
+
+#define PN544_RF_READER_NFCIP1_INITIATOR_GATE 0x30
+#define PN544_RF_READER_NFCIP1_TARGET_GATE 0x31
+
+#define PN544_SYS_MGMT_GATE 0x90
+#define PN544_SYS_MGMT_INFO_NOTIFICATION 0x02
+
+#define PN544_POLLING_LOOP_MGMT_GATE 0x94
+#define PN544_DEP_MODE 0x01
+#define PN544_DEP_ATR_REQ 0x02
+#define PN544_DEP_ATR_RES 0x03
+#define PN544_DEP_MERGE 0x0D
+#define PN544_PL_RDPHASES 0x06
+#define PN544_PL_EMULATION 0x07
+#define PN544_PL_NFCT_DEACTIVATED 0x09
+
+#define PN544_SWP_MGMT_GATE 0xA0
+
+#define PN544_NFC_WI_MGMT_GATE 0xA1
+
+#define PN544_HCI_EVT_SND_DATA 0x01
+#define PN544_HCI_EVT_ACTIVATED 0x02
+#define PN544_HCI_EVT_DEACTIVATED 0x03
+#define PN544_HCI_EVT_RCV_DATA 0x04
+#define PN544_HCI_EVT_CONTINUE_MI 0x05
+
+#define PN544_HCI_CMD_ATTREQUEST 0x12
+#define PN544_HCI_CMD_CONTINUE_ACTIVATION 0x13
+
+static struct nfc_hci_gate pn544_gates[] = {
+ {NFC_HCI_ADMIN_GATE, NFC_HCI_INVALID_PIPE},
+ {NFC_HCI_LOOPBACK_GATE, NFC_HCI_INVALID_PIPE},
+ {NFC_HCI_ID_MGMT_GATE, NFC_HCI_INVALID_PIPE},
+ {NFC_HCI_LINK_MGMT_GATE, NFC_HCI_INVALID_PIPE},
+ {NFC_HCI_RF_READER_B_GATE, NFC_HCI_INVALID_PIPE},
+ {NFC_HCI_RF_READER_A_GATE, NFC_HCI_INVALID_PIPE},
+ {PN544_SYS_MGMT_GATE, NFC_HCI_INVALID_PIPE},
+ {PN544_SWP_MGMT_GATE, NFC_HCI_INVALID_PIPE},
+ {PN544_POLLING_LOOP_MGMT_GATE, NFC_HCI_INVALID_PIPE},
+ {PN544_NFC_WI_MGMT_GATE, NFC_HCI_INVALID_PIPE},
+ {PN544_RF_READER_F_GATE, NFC_HCI_INVALID_PIPE},
+ {PN544_RF_READER_JEWEL_GATE, NFC_HCI_INVALID_PIPE},
+ {PN544_RF_READER_ISO15693_GATE, NFC_HCI_INVALID_PIPE},
+ {PN544_RF_READER_NFCIP1_INITIATOR_GATE, NFC_HCI_INVALID_PIPE},
+ {PN544_RF_READER_NFCIP1_TARGET_GATE, NFC_HCI_INVALID_PIPE}
+};
+
+/* Largest headroom needed for outgoing custom commands */
+#define PN544_CMDS_HEADROOM 2
+
+struct pn544_hci_info {
+ struct nfc_phy_ops *phy_ops;
+ void *phy_id;
+
+ struct nfc_hci_dev *hdev;
+
+ enum pn544_state state;
+
+ struct mutex info_lock;
+
+ int async_cb_type;
+ data_exchange_cb_t async_cb;
+ void *async_cb_context;
+};
+
+static int pn544_hci_open(struct nfc_hci_dev *hdev)
+{
+ struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
+ int r = 0;
+
+ mutex_lock(&info->info_lock);
+
+ if (info->state != PN544_ST_COLD) {
+ r = -EBUSY;
+ goto out;
+ }
+
+ r = info->phy_ops->enable(info->phy_id);
+
+ if (r == 0)
+ info->state = PN544_ST_READY;
+
+out:
+ mutex_unlock(&info->info_lock);
+ return r;
+}
+
+static void pn544_hci_close(struct nfc_hci_dev *hdev)
+{
+ struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
+
+ mutex_lock(&info->info_lock);
+
+ if (info->state == PN544_ST_COLD)
+ goto out;
+
+ info->phy_ops->disable(info->phy_id);
+
+ info->state = PN544_ST_COLD;
+
+out:
+ mutex_unlock(&info->info_lock);
+}
+
+static int pn544_hci_ready(struct nfc_hci_dev *hdev)
+{
+ struct sk_buff *skb;
+ static struct hw_config {
+ u8 adr[2];
+ u8 value;
+ } hw_config[] = {
+ {{0x9f, 0x9a}, 0x00},
+
+ {{0x98, 0x10}, 0xbc},
+
+ {{0x9e, 0x71}, 0x00},
+
+ {{0x98, 0x09}, 0x00},
+
+ {{0x9e, 0xb4}, 0x00},
+
+ {{0x9e, 0xd9}, 0xff},
+ {{0x9e, 0xda}, 0xff},
+ {{0x9e, 0xdb}, 0x23},
+ {{0x9e, 0xdc}, 0x21},
+ {{0x9e, 0xdd}, 0x22},
+ {{0x9e, 0xde}, 0x24},
+
+ {{0x9c, 0x01}, 0x08},
+
+ {{0x9e, 0xaa}, 0x01},
+
+ {{0x9b, 0xd1}, 0x0d},
+ {{0x9b, 0xd2}, 0x24},
+ {{0x9b, 0xd3}, 0x0a},
+ {{0x9b, 0xd4}, 0x22},
+ {{0x9b, 0xd5}, 0x08},
+ {{0x9b, 0xd6}, 0x1e},
+ {{0x9b, 0xdd}, 0x1c},
+
+ {{0x9b, 0x84}, 0x13},
+ {{0x99, 0x81}, 0x7f},
+ {{0x99, 0x31}, 0x70},
+
+ {{0x98, 0x00}, 0x3f},
+
+ {{0x9f, 0x09}, 0x00},
+
+ {{0x9f, 0x0a}, 0x05},
+
+ {{0x9e, 0xd1}, 0xa1},
+ {{0x99, 0x23}, 0x00},
+
+ {{0x9e, 0x74}, 0x80},
+
+ {{0x9f, 0x28}, 0x10},
+
+ {{0x9f, 0x35}, 0x14},
+
+ {{0x9f, 0x36}, 0x60},
+
+ {{0x9c, 0x31}, 0x00},
+
+ {{0x9c, 0x32}, 0xc8},
+
+ {{0x9c, 0x19}, 0x40},
+
+ {{0x9c, 0x1a}, 0x40},
+
+ {{0x9c, 0x0c}, 0x00},
+
+ {{0x9c, 0x0d}, 0x00},
+
+ {{0x9c, 0x12}, 0x00},
+
+ {{0x9c, 0x13}, 0x00},
+
+ {{0x98, 0xa2}, 0x0e},
+
+ {{0x98, 0x93}, 0x40},
+
+ {{0x98, 0x7d}, 0x02},
+ {{0x98, 0x7e}, 0x00},
+ {{0x9f, 0xc8}, 0x01},
+ };
+ struct hw_config *p = hw_config;
+ int count = ARRAY_SIZE(hw_config);
+ struct sk_buff *res_skb;
+ u8 param[4];
+ int r;
+
+ param[0] = 0;
+ while (count--) {
+ param[1] = p->adr[0];
+ param[2] = p->adr[1];
+ param[3] = p->value;
+
+ r = nfc_hci_send_cmd(hdev, PN544_SYS_MGMT_GATE, PN544_WRITE,
+ param, 4, &res_skb);
+ if (r < 0)
+ return r;
+
+ if (res_skb->len != 1) {
+ kfree_skb(res_skb);
+ return -EPROTO;
+ }
+
+ if (res_skb->data[0] != p->value) {
+ kfree_skb(res_skb);
+ return -EIO;
+ }
+
+ kfree_skb(res_skb);
+
+ p++;
+ }
+
+ param[0] = NFC_HCI_UICC_HOST_ID;
+ r = nfc_hci_set_param(hdev, NFC_HCI_ADMIN_GATE,
+ NFC_HCI_ADMIN_WHITELIST, param, 1);
+ if (r < 0)
+ return r;
+
+ param[0] = 0x3d;
+ r = nfc_hci_set_param(hdev, PN544_SYS_MGMT_GATE,
+ PN544_SYS_MGMT_INFO_NOTIFICATION, param, 1);
+ if (r < 0)
+ return r;
+
+ param[0] = 0x0;
+ r = nfc_hci_set_param(hdev, NFC_HCI_RF_READER_A_GATE,
+ PN544_RF_READER_A_AUTO_ACTIVATION, param, 1);
+ if (r < 0)
+ return r;
+
+ r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
+ NFC_HCI_EVT_END_OPERATION, NULL, 0);
+ if (r < 0)
+ return r;
+
+ param[0] = 0x1;
+ r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE,
+ PN544_PL_NFCT_DEACTIVATED, param, 1);
+ if (r < 0)
+ return r;
+
+ param[0] = 0x0;
+ r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE,
+ PN544_PL_RDPHASES, param, 1);
+ if (r < 0)
+ return r;
+
+ r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE,
+ PN544_ID_MGMT_FULL_VERSION_SW, &skb);
+ if (r < 0)
+ return r;
+
+ if (skb->len != FULL_VERSION_LEN) {
+ kfree_skb(skb);
+ return -EINVAL;
+ }
+
+ print_hex_dump(KERN_DEBUG, "FULL VERSION SOFTWARE INFO: ",
+ DUMP_PREFIX_NONE, 16, 1,
+ skb->data, FULL_VERSION_LEN, false);
+
+ kfree_skb(skb);
+
+ return 0;
+}
+
+static int pn544_hci_xmit(struct nfc_hci_dev *hdev, struct sk_buff *skb)
+{
+ struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
+
+ return info->phy_ops->write(info->phy_id, skb);
+}
+
+static int pn544_hci_start_poll(struct nfc_hci_dev *hdev,
+ u32 im_protocols, u32 tm_protocols)
+{
+ u8 phases = 0;
+ int r;
+ u8 duration[2];
+ u8 activated;
+ u8 i_mode = 0x3f; /* Enable all supported modes */
+ u8 t_mode = 0x0f;
+ u8 t_merge = 0x01; /* Enable merge by default */
+
+ pr_info(DRIVER_DESC ": %s protocols 0x%x 0x%x\n",
+ __func__, im_protocols, tm_protocols);
+
+ r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
+ NFC_HCI_EVT_END_OPERATION, NULL, 0);
+ if (r < 0)
+ return r;
+
+ duration[0] = 0x18;
+ duration[1] = 0x6a;
+ r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE,
+ PN544_PL_EMULATION, duration, 2);
+ if (r < 0)
+ return r;
+
+ activated = 0;
+ r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE,
+ PN544_PL_NFCT_DEACTIVATED, &activated, 1);
+ if (r < 0)
+ return r;
+
+ if (im_protocols & (NFC_PROTO_ISO14443_MASK | NFC_PROTO_MIFARE_MASK |
+ NFC_PROTO_JEWEL_MASK))
+ phases |= 1; /* Type A */
+ if (im_protocols & NFC_PROTO_FELICA_MASK) {
+ phases |= (1 << 2); /* Type F 212 */
+ phases |= (1 << 3); /* Type F 424 */
+ }
+
+ phases |= (1 << 5); /* NFC active */
+
+ r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE,
+ PN544_PL_RDPHASES, &phases, 1);
+ if (r < 0)
+ return r;
+
+ if ((im_protocols | tm_protocols) & NFC_PROTO_NFC_DEP_MASK) {
+ hdev->gb = nfc_get_local_general_bytes(hdev->ndev,
+ &hdev->gb_len);
+ pr_debug("generate local bytes %p", hdev->gb);
+ if (hdev->gb == NULL || hdev->gb_len == 0) {
+ im_protocols &= ~NFC_PROTO_NFC_DEP_MASK;
+ tm_protocols &= ~NFC_PROTO_NFC_DEP_MASK;
+ }
+ }
+
+ if (im_protocols & NFC_PROTO_NFC_DEP_MASK) {
+ r = nfc_hci_send_event(hdev,
+ PN544_RF_READER_NFCIP1_INITIATOR_GATE,
+ NFC_HCI_EVT_END_OPERATION, NULL, 0);
+ if (r < 0)
+ return r;
+
+ r = nfc_hci_set_param(hdev,
+ PN544_RF_READER_NFCIP1_INITIATOR_GATE,
+ PN544_DEP_MODE, &i_mode, 1);
+ if (r < 0)
+ return r;
+
+ r = nfc_hci_set_param(hdev,
+ PN544_RF_READER_NFCIP1_INITIATOR_GATE,
+ PN544_DEP_ATR_REQ, hdev->gb, hdev->gb_len);
+ if (r < 0)
+ return r;
+
+ r = nfc_hci_send_event(hdev,
+ PN544_RF_READER_NFCIP1_INITIATOR_GATE,
+ NFC_HCI_EVT_READER_REQUESTED, NULL, 0);
+ if (r < 0)
+ nfc_hci_send_event(hdev,
+ PN544_RF_READER_NFCIP1_INITIATOR_GATE,
+ NFC_HCI_EVT_END_OPERATION, NULL, 0);
+ }
+
+ if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) {
+ r = nfc_hci_set_param(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE,
+ PN544_DEP_MODE, &t_mode, 1);
+ if (r < 0)
+ return r;
+
+ r = nfc_hci_set_param(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE,
+ PN544_DEP_ATR_RES, hdev->gb, hdev->gb_len);
+ if (r < 0)
+ return r;
+
+ r = nfc_hci_set_param(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE,
+ PN544_DEP_MERGE, &t_merge, 1);
+ if (r < 0)
+ return r;
+ }
+
+ r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
+ NFC_HCI_EVT_READER_REQUESTED, NULL, 0);
+ if (r < 0)
+ nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
+ NFC_HCI_EVT_END_OPERATION, NULL, 0);
+
+ return r;
+}
+
+static int pn544_hci_dep_link_up(struct nfc_hci_dev *hdev,
+ struct nfc_target *target, u8 comm_mode,
+ u8 *gb, size_t gb_len)
+{
+ struct sk_buff *rgb_skb = NULL;
+ int r;
+
+ r = nfc_hci_get_param(hdev, target->hci_reader_gate,
+ PN544_DEP_ATR_RES, &rgb_skb);
+ if (r < 0)
+ return r;
+
+ if (rgb_skb->len == 0 || rgb_skb->len > NFC_GB_MAXSIZE) {
+ r = -EPROTO;
+ goto exit;
+ }
+ print_hex_dump(KERN_DEBUG, "remote gb: ", DUMP_PREFIX_OFFSET,
+ 16, 1, rgb_skb->data, rgb_skb->len, true);
+
+ r = nfc_set_remote_general_bytes(hdev->ndev, rgb_skb->data,
+ rgb_skb->len);
+
+ if (r == 0)
+ r = nfc_dep_link_is_up(hdev->ndev, target->idx, comm_mode,
+ NFC_RF_INITIATOR);
+exit:
+ kfree_skb(rgb_skb);
+ return r;
+}
+
+static int pn544_hci_dep_link_down(struct nfc_hci_dev *hdev)
+{
+
+ return nfc_hci_send_event(hdev, PN544_RF_READER_NFCIP1_INITIATOR_GATE,
+ NFC_HCI_EVT_END_OPERATION, NULL, 0);
+}
+
+static int pn544_hci_target_from_gate(struct nfc_hci_dev *hdev, u8 gate,
+ struct nfc_target *target)
+{
+ switch (gate) {
+ case PN544_RF_READER_F_GATE:
+ target->supported_protocols = NFC_PROTO_FELICA_MASK;
+ break;
+ case PN544_RF_READER_JEWEL_GATE:
+ target->supported_protocols = NFC_PROTO_JEWEL_MASK;
+ target->sens_res = 0x0c00;
+ break;
+ case PN544_RF_READER_NFCIP1_INITIATOR_GATE:
+ target->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
+ break;
+ default:
+ return -EPROTO;
+ }
+
+ return 0;
+}
+
+static int pn544_hci_complete_target_discovered(struct nfc_hci_dev *hdev,
+ u8 gate,
+ struct nfc_target *target)
+{
+ struct sk_buff *uid_skb;
+ int r = 0;
+
+ if (gate == PN544_RF_READER_NFCIP1_INITIATOR_GATE)
+ return r;
+
+ if (target->supported_protocols & NFC_PROTO_NFC_DEP_MASK) {
+ r = nfc_hci_send_cmd(hdev,
+ PN544_RF_READER_NFCIP1_INITIATOR_GATE,
+ PN544_HCI_CMD_CONTINUE_ACTIVATION, NULL, 0, NULL);
+ if (r < 0)
+ return r;
+
+ target->hci_reader_gate = PN544_RF_READER_NFCIP1_INITIATOR_GATE;
+ } else if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) {
+ if (target->nfcid1_len != 4 && target->nfcid1_len != 7 &&
+ target->nfcid1_len != 10)
+ return -EPROTO;
+
+ r = nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE,
+ PN544_RF_READER_CMD_ACTIVATE_NEXT,
+ target->nfcid1, target->nfcid1_len, NULL);
+ } else if (target->supported_protocols & NFC_PROTO_FELICA_MASK) {
+ r = nfc_hci_get_param(hdev, PN544_RF_READER_F_GATE,
+ PN544_FELICA_ID, &uid_skb);
+ if (r < 0)
+ return r;
+
+ if (uid_skb->len != 8) {
+ kfree_skb(uid_skb);
+ return -EPROTO;
+ }
+
+ r = nfc_hci_send_cmd(hdev, PN544_RF_READER_F_GATE,
+ PN544_RF_READER_CMD_ACTIVATE_NEXT,
+ uid_skb->data, uid_skb->len, NULL);
+ kfree_skb(uid_skb);
+
+ r = nfc_hci_send_cmd(hdev,
+ PN544_RF_READER_NFCIP1_INITIATOR_GATE,
+ PN544_HCI_CMD_CONTINUE_ACTIVATION,
+ NULL, 0, NULL);
+ if (r < 0)
+ return r;
+
+ target->hci_reader_gate = PN544_RF_READER_NFCIP1_INITIATOR_GATE;
+ target->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
+ } else if (target->supported_protocols & NFC_PROTO_ISO14443_MASK) {
+ /*
+ * TODO: maybe other ISO 14443 require some kind of continue
+ * activation, but for now we've seen only this one below.
+ */
+ if (target->sens_res == 0x4403) /* Type 4 Mifare DESFire */
+ r = nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE,
+ PN544_RF_READER_A_CMD_CONTINUE_ACTIVATION,
+ NULL, 0, NULL);
+ }
+
+ return r;
+}
+
+#define PN544_CB_TYPE_READER_F 1
+
+static void pn544_hci_data_exchange_cb(void *context, struct sk_buff *skb,
+ int err)
+{
+ struct pn544_hci_info *info = context;
+
+ switch (info->async_cb_type) {
+ case PN544_CB_TYPE_READER_F:
+ if (err == 0)
+ skb_pull(skb, 1);
+ info->async_cb(info->async_cb_context, skb, err);
+ break;
+ default:
+ if (err == 0)
+ kfree_skb(skb);
+ break;
+ }
+}
+
+#define MIFARE_CMD_AUTH_KEY_A 0x60
+#define MIFARE_CMD_AUTH_KEY_B 0x61
+#define MIFARE_CMD_HEADER 2
+#define MIFARE_UID_LEN 4
+#define MIFARE_KEY_LEN 6
+#define MIFARE_CMD_LEN 12
+/*
+ * Returns:
+ * <= 0: driver handled the data exchange
+ * 1: driver doesn't especially handle, please do standard processing
+ */
+static int pn544_hci_im_transceive(struct nfc_hci_dev *hdev,
+ struct nfc_target *target,
+ struct sk_buff *skb, data_exchange_cb_t cb,
+ void *cb_context)
+{
+ struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
+
+ pr_info(DRIVER_DESC ": %s for gate=%d\n", __func__,
+ target->hci_reader_gate);
+
+ switch (target->hci_reader_gate) {
+ case NFC_HCI_RF_READER_A_GATE:
+ if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) {
+ /*
+ * It seems that pn544 is inverting key and UID for
+ * MIFARE authentication commands.
+ */
+ if (skb->len == MIFARE_CMD_LEN &&
+ (skb->data[0] == MIFARE_CMD_AUTH_KEY_A ||
+ skb->data[0] == MIFARE_CMD_AUTH_KEY_B)) {
+ u8 uid[MIFARE_UID_LEN];
+ u8 *data = skb->data + MIFARE_CMD_HEADER;
+
+ memcpy(uid, data + MIFARE_KEY_LEN,
+ MIFARE_UID_LEN);
+ memmove(data + MIFARE_UID_LEN, data,
+ MIFARE_KEY_LEN);
+ memcpy(data, uid, MIFARE_UID_LEN);
+ }
+
+ return nfc_hci_send_cmd_async(hdev,
+ target->hci_reader_gate,
+ PN544_MIFARE_CMD,
+ skb->data, skb->len,
+ cb, cb_context);
+ } else
+ return 1;
+ case PN544_RF_READER_F_GATE:
+ *skb_push(skb, 1) = 0;
+ *skb_push(skb, 1) = 0;
+
+ info->async_cb_type = PN544_CB_TYPE_READER_F;
+ info->async_cb = cb;
+ info->async_cb_context = cb_context;
+
+ return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
+ PN544_FELICA_RAW, skb->data,
+ skb->len,
+ pn544_hci_data_exchange_cb, info);
+ case PN544_RF_READER_JEWEL_GATE:
+ return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
+ PN544_JEWEL_RAW_CMD, skb->data,
+ skb->len, cb, cb_context);
+ case PN544_RF_READER_NFCIP1_INITIATOR_GATE:
+ *skb_push(skb, 1) = 0;
+
+ return nfc_hci_send_event(hdev, target->hci_reader_gate,
+ PN544_HCI_EVT_SND_DATA, skb->data,
+ skb->len);
+ default:
+ return 1;
+ }
+}
+
+static int pn544_hci_tm_send(struct nfc_hci_dev *hdev, struct sk_buff *skb)
+{
+ /* Set default false for multiple information chaining */
+ *skb_push(skb, 1) = 0;
+
+ return nfc_hci_send_event(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE,
+ PN544_HCI_EVT_SND_DATA, skb->data, skb->len);
+}
+
+static int pn544_hci_check_presence(struct nfc_hci_dev *hdev,
+ struct nfc_target *target)
+{
+ pr_debug("supported protocol %d", target->supported_protocols);
+ if (target->supported_protocols & (NFC_PROTO_ISO14443_MASK |
+ NFC_PROTO_ISO14443_B_MASK)) {
+ return nfc_hci_send_cmd(hdev, target->hci_reader_gate,
+ PN544_RF_READER_CMD_PRESENCE_CHECK,
+ NULL, 0, NULL);
+ } else if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) {
+ if (target->nfcid1_len != 4 && target->nfcid1_len != 7 &&
+ target->nfcid1_len != 10)
+ return -EOPNOTSUPP;
+
+ return nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE,
+ PN544_RF_READER_CMD_ACTIVATE_NEXT,
+ target->nfcid1, target->nfcid1_len, NULL);
+ } else if (target->supported_protocols & NFC_PROTO_JEWEL_MASK) {
+ return nfc_hci_send_cmd(hdev, target->hci_reader_gate,
+ PN544_JEWEL_RAW_CMD, NULL, 0, NULL);
+ } else if (target->supported_protocols & NFC_PROTO_FELICA_MASK) {
+ return nfc_hci_send_cmd(hdev, PN544_RF_READER_F_GATE,
+ PN544_FELICA_RAW, NULL, 0, NULL);
+ } else if (target->supported_protocols & NFC_PROTO_NFC_DEP_MASK) {
+ return nfc_hci_send_cmd(hdev, target->hci_reader_gate,
+ PN544_HCI_CMD_ATTREQUEST,
+ NULL, 0, NULL);
+ }
+
+ return 0;
+}
+
+void pn544_hci_event_received(struct nfc_hci_dev *hdev, u8 gate, u8 event,
+ struct sk_buff *skb)
+{
+ struct sk_buff *rgb_skb = NULL;
+ int r = 0;
+
+ pr_debug("hci event %d", event);
+ switch (event) {
+ case PN544_HCI_EVT_ACTIVATED:
+ if (gate == PN544_RF_READER_NFCIP1_INITIATOR_GATE)
+ nfc_hci_target_discovered(hdev, gate);
+ else if (gate == PN544_RF_READER_NFCIP1_TARGET_GATE) {
+ r = nfc_hci_get_param(hdev, gate, PN544_DEP_ATR_REQ,
+ &rgb_skb);
+
+ if (r < 0)
+ goto exit;
+
+ nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK,
+ NFC_COMM_PASSIVE, rgb_skb->data,
+ rgb_skb->len);
+
+ kfree_skb(rgb_skb);
+ }
+
+ break;
+ case PN544_HCI_EVT_DEACTIVATED:
+ nfc_hci_send_event(hdev, gate,
+ NFC_HCI_EVT_END_OPERATION, NULL, 0);
+ break;
+ case PN544_HCI_EVT_RCV_DATA:
+ if (skb->len < 2) {
+ r = -EPROTO;
+ goto exit;
+ }
+
+ if (skb->data[0] != 0) {
+ pr_debug("data0 %d", skb->data[0]);
+ r = -EPROTO;
+ goto exit;
+ }
+
+ skb_pull(skb, 2);
+ nfc_tm_data_received(hdev->ndev, skb);
+
+ return;
+ default:
+ break;
+ }
+
+exit:
+ kfree_skb(skb);
+}
+
+static struct nfc_hci_ops pn544_hci_ops = {
+ .open = pn544_hci_open,
+ .close = pn544_hci_close,
+ .hci_ready = pn544_hci_ready,
+ .xmit = pn544_hci_xmit,
+ .start_poll = pn544_hci_start_poll,
+ .dep_link_up = pn544_hci_dep_link_up,
+ .dep_link_down = pn544_hci_dep_link_down,
+ .target_from_gate = pn544_hci_target_from_gate,
+ .complete_target_discovered = pn544_hci_complete_target_discovered,
+ .im_transceive = pn544_hci_im_transceive,
+ .tm_send = pn544_hci_tm_send,
+ .check_presence = pn544_hci_check_presence,
+ .event_received = pn544_hci_event_received,
+};
+
+int pn544_hci_probe(void *phy_id, struct nfc_phy_ops *phy_ops, char *llc_name,
+ int phy_headroom, int phy_tailroom, int phy_payload,
+ struct nfc_hci_dev **hdev)
+{
+ struct pn544_hci_info *info;
+ u32 protocols;
+ struct nfc_hci_init_data init_data;
+ int r;
+
+ info = kzalloc(sizeof(struct pn544_hci_info), GFP_KERNEL);
+ if (!info) {
+ pr_err("Cannot allocate memory for pn544_hci_info.\n");
+ r = -ENOMEM;
+ goto err_info_alloc;
+ }
+
+ info->phy_ops = phy_ops;
+ info->phy_id = phy_id;
+ info->state = PN544_ST_COLD;
+ mutex_init(&info->info_lock);
+
+ init_data.gate_count = ARRAY_SIZE(pn544_gates);
+
+ memcpy(init_data.gates, pn544_gates, sizeof(pn544_gates));
+
+ /*
+ * TODO: Session id must include the driver name + some bus addr
+ * persistent info to discriminate 2 identical chips
+ */
+ strcpy(init_data.session_id, "ID544HCI");
+
+ 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;
+
+ info->hdev = nfc_hci_allocate_device(&pn544_hci_ops, &init_data,
+ protocols, llc_name,
+ phy_headroom + PN544_CMDS_HEADROOM,
+ phy_tailroom, phy_payload);
+ if (!info->hdev) {
+ pr_err("Cannot allocate nfc hdev.\n");
+ r = -ENOMEM;
+ goto err_alloc_hdev;
+ }
+
+ nfc_hci_set_clientdata(info->hdev, info);
+
+ r = nfc_hci_register_device(info->hdev);
+ if (r)
+ goto err_regdev;
+
+ *hdev = info->hdev;
+
+ return 0;
+
+err_regdev:
+ nfc_hci_free_device(info->hdev);
+
+err_alloc_hdev:
+ kfree(info);
+
+err_info_alloc:
+ return r;
+}
+
+void pn544_hci_remove(struct nfc_hci_dev *hdev)
+{
+ struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
+
+ nfc_hci_unregister_device(hdev);
+ nfc_hci_free_device(hdev);
+ kfree(info);
+}
--- /dev/null
+/*
+ * Copyright (C) 2011 - 2012 Intel Corporation. All rights reserved.
+ *
+ * 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.
+ */
+
+#ifndef __LOCAL_PN544_H_
+#define __LOCAL_PN544_H_
+
+#include <net/nfc/hci.h>
+
+#define DRIVER_DESC "HCI NFC driver for PN544"
+
+int pn544_hci_probe(void *phy_id, struct nfc_phy_ops *phy_ops, char *llc_name,
+ int phy_headroom, int phy_tailroom, int phy_payload,
+ struct nfc_hci_dev **hdev);
+void pn544_hci_remove(struct nfc_hci_dev *hdev);
+
+#endif /* __LOCAL_PN544_H_ */
+++ /dev/null
-/*
- * HCI based Driver for NXP PN544 NFC Chip
- *
- * 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, write to the
- * Free Software Foundation, Inc.,
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-
-#include <linux/crc-ccitt.h>
-#include <linux/module.h>
-#include <linux/delay.h>
-#include <linux/slab.h>
-#include <linux/miscdevice.h>
-#include <linux/interrupt.h>
-#include <linux/gpio.h>
-#include <linux/i2c.h>
-
-#include <linux/nfc.h>
-#include <net/nfc/hci.h>
-#include <net/nfc/llc.h>
-
-#include <linux/nfc/pn544.h>
-
-#define DRIVER_DESC "HCI NFC driver for PN544"
-
-#define PN544_HCI_DRIVER_NAME "pn544_hci"
-
-/* Timing restrictions (ms) */
-#define PN544_HCI_RESETVEN_TIME 30
-
-static struct i2c_device_id pn544_hci_id_table[] = {
- {"pn544", 0},
- {}
-};
-
-MODULE_DEVICE_TABLE(i2c, pn544_hci_id_table);
-
-#define HCI_MODE 0
-#define FW_MODE 1
-
-/* framing in HCI mode */
-#define PN544_HCI_LLC_LEN 1
-#define PN544_HCI_LLC_CRC 2
-#define PN544_HCI_LLC_LEN_CRC (PN544_HCI_LLC_LEN + PN544_HCI_LLC_CRC)
-#define PN544_HCI_LLC_MIN_SIZE (1 + PN544_HCI_LLC_LEN_CRC)
-#define PN544_HCI_LLC_MAX_PAYLOAD 29
-#define PN544_HCI_LLC_MAX_SIZE (PN544_HCI_LLC_LEN_CRC + 1 + \
- PN544_HCI_LLC_MAX_PAYLOAD)
-
-enum pn544_state {
- PN544_ST_COLD,
- PN544_ST_FW_READY,
- PN544_ST_READY,
-};
-
-#define FULL_VERSION_LEN 11
-
-/* Proprietary commands */
-#define PN544_WRITE 0x3f
-
-/* Proprietary gates, events, commands and registers */
-
-/* NFC_HCI_RF_READER_A_GATE additional registers and commands */
-#define PN544_RF_READER_A_AUTO_ACTIVATION 0x10
-#define PN544_RF_READER_A_CMD_CONTINUE_ACTIVATION 0x12
-#define PN544_MIFARE_CMD 0x21
-
-/* Commands that apply to all RF readers */
-#define PN544_RF_READER_CMD_PRESENCE_CHECK 0x30
-#define PN544_RF_READER_CMD_ACTIVATE_NEXT 0x32
-
-/* NFC_HCI_ID_MGMT_GATE additional registers */
-#define PN544_ID_MGMT_FULL_VERSION_SW 0x10
-
-#define PN544_RF_READER_ISO15693_GATE 0x12
-
-#define PN544_RF_READER_F_GATE 0x14
-#define PN544_FELICA_ID 0x04
-#define PN544_FELICA_RAW 0x20
-
-#define PN544_RF_READER_JEWEL_GATE 0x15
-#define PN544_JEWEL_RAW_CMD 0x23
-
-#define PN544_RF_READER_NFCIP1_INITIATOR_GATE 0x30
-#define PN544_RF_READER_NFCIP1_TARGET_GATE 0x31
-
-#define PN544_SYS_MGMT_GATE 0x90
-#define PN544_SYS_MGMT_INFO_NOTIFICATION 0x02
-
-#define PN544_POLLING_LOOP_MGMT_GATE 0x94
-#define PN544_DEP_MODE 0x01
-#define PN544_DEP_ATR_REQ 0x02
-#define PN544_DEP_ATR_RES 0x03
-#define PN544_DEP_MERGE 0x0D
-#define PN544_PL_RDPHASES 0x06
-#define PN544_PL_EMULATION 0x07
-#define PN544_PL_NFCT_DEACTIVATED 0x09
-
-#define PN544_SWP_MGMT_GATE 0xA0
-
-#define PN544_NFC_WI_MGMT_GATE 0xA1
-
-#define PN544_HCI_EVT_SND_DATA 0x01
-#define PN544_HCI_EVT_ACTIVATED 0x02
-#define PN544_HCI_EVT_DEACTIVATED 0x03
-#define PN544_HCI_EVT_RCV_DATA 0x04
-#define PN544_HCI_EVT_CONTINUE_MI 0x05
-
-#define PN544_HCI_CMD_ATTREQUEST 0x12
-#define PN544_HCI_CMD_CONTINUE_ACTIVATION 0x13
-
-static struct nfc_hci_gate pn544_gates[] = {
- {NFC_HCI_ADMIN_GATE, NFC_HCI_INVALID_PIPE},
- {NFC_HCI_LOOPBACK_GATE, NFC_HCI_INVALID_PIPE},
- {NFC_HCI_ID_MGMT_GATE, NFC_HCI_INVALID_PIPE},
- {NFC_HCI_LINK_MGMT_GATE, NFC_HCI_INVALID_PIPE},
- {NFC_HCI_RF_READER_B_GATE, NFC_HCI_INVALID_PIPE},
- {NFC_HCI_RF_READER_A_GATE, NFC_HCI_INVALID_PIPE},
- {PN544_SYS_MGMT_GATE, NFC_HCI_INVALID_PIPE},
- {PN544_SWP_MGMT_GATE, NFC_HCI_INVALID_PIPE},
- {PN544_POLLING_LOOP_MGMT_GATE, NFC_HCI_INVALID_PIPE},
- {PN544_NFC_WI_MGMT_GATE, NFC_HCI_INVALID_PIPE},
- {PN544_RF_READER_F_GATE, NFC_HCI_INVALID_PIPE},
- {PN544_RF_READER_JEWEL_GATE, NFC_HCI_INVALID_PIPE},
- {PN544_RF_READER_ISO15693_GATE, NFC_HCI_INVALID_PIPE},
- {PN544_RF_READER_NFCIP1_INITIATOR_GATE, NFC_HCI_INVALID_PIPE},
- {PN544_RF_READER_NFCIP1_TARGET_GATE, NFC_HCI_INVALID_PIPE}
-};
-
-/* Largest headroom needed for outgoing custom commands */
-#define PN544_CMDS_HEADROOM 2
-#define PN544_FRAME_HEADROOM 1
-#define PN544_FRAME_TAILROOM 2
-
-struct pn544_hci_info {
- struct i2c_client *i2c_dev;
- struct nfc_hci_dev *hdev;
-
- enum pn544_state state;
-
- struct mutex info_lock;
-
- unsigned int gpio_en;
- unsigned int gpio_irq;
- unsigned int gpio_fw;
- unsigned int en_polarity;
-
- int hard_fault; /*
- * < 0 if hardware error occured (e.g. i2c err)
- * and prevents normal operation.
- */
- int async_cb_type;
- data_exchange_cb_t async_cb;
- void *async_cb_context;
-};
-
-static void pn544_hci_platform_init(struct pn544_hci_info *info)
-{
- int polarity, retry, ret;
- char rset_cmd[] = { 0x05, 0xF9, 0x04, 0x00, 0xC3, 0xE5 };
- int count = sizeof(rset_cmd);
-
- pr_info(DRIVER_DESC ": %s\n", __func__);
- dev_info(&info->i2c_dev->dev, "Detecting nfc_en polarity\n");
-
- /* Disable fw download */
- gpio_set_value(info->gpio_fw, 0);
-
- for (polarity = 0; polarity < 2; polarity++) {
- info->en_polarity = polarity;
- retry = 3;
- while (retry--) {
- /* power off */
- gpio_set_value(info->gpio_en, !info->en_polarity);
- usleep_range(10000, 15000);
-
- /* power on */
- gpio_set_value(info->gpio_en, info->en_polarity);
- usleep_range(10000, 15000);
-
- /* send reset */
- dev_dbg(&info->i2c_dev->dev, "Sending reset cmd\n");
- ret = i2c_master_send(info->i2c_dev, rset_cmd, count);
- if (ret == count) {
- dev_info(&info->i2c_dev->dev,
- "nfc_en polarity : active %s\n",
- (polarity == 0 ? "low" : "high"));
- goto out;
- }
- }
- }
-
- dev_err(&info->i2c_dev->dev,
- "Could not detect nfc_en polarity, fallback to active high\n");
-
-out:
- gpio_set_value(info->gpio_en, !info->en_polarity);
-}
-
-static int pn544_hci_enable(struct pn544_hci_info *info, int mode)
-{
- pr_info(DRIVER_DESC ": %s\n", __func__);
-
- gpio_set_value(info->gpio_fw, 0);
- gpio_set_value(info->gpio_en, info->en_polarity);
- usleep_range(10000, 15000);
-
- return 0;
-}
-
-static void pn544_hci_disable(struct pn544_hci_info *info)
-{
- pr_info(DRIVER_DESC ": %s\n", __func__);
-
- gpio_set_value(info->gpio_fw, 0);
- gpio_set_value(info->gpio_en, !info->en_polarity);
- usleep_range(10000, 15000);
-
- gpio_set_value(info->gpio_en, info->en_polarity);
- usleep_range(10000, 15000);
-
- gpio_set_value(info->gpio_en, !info->en_polarity);
- usleep_range(10000, 15000);
-}
-
-static int pn544_hci_i2c_write(struct i2c_client *client, u8 *buf, int len)
-{
- int r;
-
- usleep_range(3000, 6000);
-
- r = i2c_master_send(client, buf, len);
-
- if (r == -EREMOTEIO) { /* Retry, chip was in standby */
- usleep_range(6000, 10000);
- r = i2c_master_send(client, buf, len);
- }
-
- if (r >= 0) {
- if (r != len)
- return -EREMOTEIO;
- else
- return 0;
- }
-
- return r;
-}
-
-static int check_crc(u8 *buf, int buflen)
-{
- int len;
- u16 crc;
-
- len = buf[0] + 1;
- crc = crc_ccitt(0xffff, buf, len - 2);
- crc = ~crc;
-
- if (buf[len - 2] != (crc & 0xff) || buf[len - 1] != (crc >> 8)) {
- pr_err(PN544_HCI_DRIVER_NAME ": CRC error 0x%x != 0x%x 0x%x\n",
- crc, buf[len - 1], buf[len - 2]);
-
- pr_info(DRIVER_DESC ": %s : BAD CRC\n", __func__);
- print_hex_dump(KERN_DEBUG, "crc: ", DUMP_PREFIX_NONE,
- 16, 2, buf, buflen, false);
- return -EPERM;
- }
- return 0;
-}
-
-/*
- * Reads an shdlc frame and returns it in a newly allocated sk_buff. Guarantees
- * that i2c bus will be flushed and that next read will start on a new frame.
- * returned skb contains only LLC header and payload.
- * returns:
- * -EREMOTEIO : i2c read error (fatal)
- * -EBADMSG : frame was incorrect and discarded
- * -ENOMEM : cannot allocate skb, frame dropped
- */
-static int pn544_hci_i2c_read(struct i2c_client *client, struct sk_buff **skb)
-{
- int r;
- u8 len;
- u8 tmp[PN544_HCI_LLC_MAX_SIZE - 1];
-
- r = i2c_master_recv(client, &len, 1);
- if (r != 1) {
- dev_err(&client->dev, "cannot read len byte\n");
- return -EREMOTEIO;
- }
-
- if ((len < (PN544_HCI_LLC_MIN_SIZE - 1)) ||
- (len > (PN544_HCI_LLC_MAX_SIZE - 1))) {
- dev_err(&client->dev, "invalid len byte\n");
- r = -EBADMSG;
- goto flush;
- }
-
- *skb = alloc_skb(1 + len, GFP_KERNEL);
- if (*skb == NULL) {
- r = -ENOMEM;
- goto flush;
- }
-
- *skb_put(*skb, 1) = len;
-
- r = i2c_master_recv(client, skb_put(*skb, len), len);
- if (r != len) {
- kfree_skb(*skb);
- return -EREMOTEIO;
- }
-
- r = check_crc((*skb)->data, (*skb)->len);
- if (r != 0) {
- kfree_skb(*skb);
- r = -EBADMSG;
- goto flush;
- }
-
- skb_pull(*skb, 1);
- skb_trim(*skb, (*skb)->len - 2);
-
- usleep_range(3000, 6000);
-
- return 0;
-
-flush:
- if (i2c_master_recv(client, tmp, sizeof(tmp)) < 0)
- r = -EREMOTEIO;
-
- usleep_range(3000, 6000);
-
- return r;
-}
-
-/*
- * Reads an shdlc frame from the chip. This is not as straightforward as it
- * seems. There are cases where we could loose the frame start synchronization.
- * The frame format is len-data-crc, and corruption can occur anywhere while
- * transiting on i2c bus, such that we could read an invalid len.
- * In order to recover synchronization with the next frame, we must be sure
- * to read the real amount of data without using the len byte. We do this by
- * assuming the following:
- * - the chip will always present only one single complete frame on the bus
- * before triggering the interrupt
- * - the chip will not present a new frame until we have completely read
- * the previous one (or until we have handled the interrupt).
- * The tricky case is when we read a corrupted len that is less than the real
- * len. We must detect this here in order to determine that we need to flush
- * the bus. This is the reason why we check the crc here.
- */
-static irqreturn_t pn544_hci_irq_thread_fn(int irq, void *dev_id)
-{
- struct pn544_hci_info *info = dev_id;
- struct i2c_client *client;
- struct sk_buff *skb = NULL;
- int r;
-
- if (!info || irq != info->i2c_dev->irq) {
- WARN_ON_ONCE(1);
- return IRQ_NONE;
- }
-
- client = info->i2c_dev;
- dev_dbg(&client->dev, "IRQ\n");
-
- if (info->hard_fault != 0)
- return IRQ_HANDLED;
-
- r = pn544_hci_i2c_read(client, &skb);
- if (r == -EREMOTEIO) {
- info->hard_fault = r;
-
- nfc_hci_recv_frame(info->hdev, NULL);
-
- return IRQ_HANDLED;
- } else if ((r == -ENOMEM) || (r == -EBADMSG)) {
- return IRQ_HANDLED;
- }
-
- nfc_hci_recv_frame(info->hdev, skb);
-
- return IRQ_HANDLED;
-}
-
-static int pn544_hci_open(struct nfc_hci_dev *hdev)
-{
- struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
- int r = 0;
-
- mutex_lock(&info->info_lock);
-
- if (info->state != PN544_ST_COLD) {
- r = -EBUSY;
- goto out;
- }
-
- r = pn544_hci_enable(info, HCI_MODE);
-
- if (r == 0)
- info->state = PN544_ST_READY;
-
-out:
- mutex_unlock(&info->info_lock);
- return r;
-}
-
-static void pn544_hci_close(struct nfc_hci_dev *hdev)
-{
- struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
-
- mutex_lock(&info->info_lock);
-
- if (info->state == PN544_ST_COLD)
- goto out;
-
- pn544_hci_disable(info);
-
- info->state = PN544_ST_COLD;
-
-out:
- mutex_unlock(&info->info_lock);
-}
-
-static int pn544_hci_ready(struct nfc_hci_dev *hdev)
-{
- struct sk_buff *skb;
- static struct hw_config {
- u8 adr[2];
- u8 value;
- } hw_config[] = {
- {{0x9f, 0x9a}, 0x00},
-
- {{0x98, 0x10}, 0xbc},
-
- {{0x9e, 0x71}, 0x00},
-
- {{0x98, 0x09}, 0x00},
-
- {{0x9e, 0xb4}, 0x00},
-
- {{0x9e, 0xd9}, 0xff},
- {{0x9e, 0xda}, 0xff},
- {{0x9e, 0xdb}, 0x23},
- {{0x9e, 0xdc}, 0x21},
- {{0x9e, 0xdd}, 0x22},
- {{0x9e, 0xde}, 0x24},
-
- {{0x9c, 0x01}, 0x08},
-
- {{0x9e, 0xaa}, 0x01},
-
- {{0x9b, 0xd1}, 0x0d},
- {{0x9b, 0xd2}, 0x24},
- {{0x9b, 0xd3}, 0x0a},
- {{0x9b, 0xd4}, 0x22},
- {{0x9b, 0xd5}, 0x08},
- {{0x9b, 0xd6}, 0x1e},
- {{0x9b, 0xdd}, 0x1c},
-
- {{0x9b, 0x84}, 0x13},
- {{0x99, 0x81}, 0x7f},
- {{0x99, 0x31}, 0x70},
-
- {{0x98, 0x00}, 0x3f},
-
- {{0x9f, 0x09}, 0x00},
-
- {{0x9f, 0x0a}, 0x05},
-
- {{0x9e, 0xd1}, 0xa1},
- {{0x99, 0x23}, 0x00},
-
- {{0x9e, 0x74}, 0x80},
-
- {{0x9f, 0x28}, 0x10},
-
- {{0x9f, 0x35}, 0x14},
-
- {{0x9f, 0x36}, 0x60},
-
- {{0x9c, 0x31}, 0x00},
-
- {{0x9c, 0x32}, 0xc8},
-
- {{0x9c, 0x19}, 0x40},
-
- {{0x9c, 0x1a}, 0x40},
-
- {{0x9c, 0x0c}, 0x00},
-
- {{0x9c, 0x0d}, 0x00},
-
- {{0x9c, 0x12}, 0x00},
-
- {{0x9c, 0x13}, 0x00},
-
- {{0x98, 0xa2}, 0x0e},
-
- {{0x98, 0x93}, 0x40},
-
- {{0x98, 0x7d}, 0x02},
- {{0x98, 0x7e}, 0x00},
- {{0x9f, 0xc8}, 0x01},
- };
- struct hw_config *p = hw_config;
- int count = ARRAY_SIZE(hw_config);
- struct sk_buff *res_skb;
- u8 param[4];
- int r;
-
- param[0] = 0;
- while (count--) {
- param[1] = p->adr[0];
- param[2] = p->adr[1];
- param[3] = p->value;
-
- r = nfc_hci_send_cmd(hdev, PN544_SYS_MGMT_GATE, PN544_WRITE,
- param, 4, &res_skb);
- if (r < 0)
- return r;
-
- if (res_skb->len != 1) {
- kfree_skb(res_skb);
- return -EPROTO;
- }
-
- if (res_skb->data[0] != p->value) {
- kfree_skb(res_skb);
- return -EIO;
- }
-
- kfree_skb(res_skb);
-
- p++;
- }
-
- param[0] = NFC_HCI_UICC_HOST_ID;
- r = nfc_hci_set_param(hdev, NFC_HCI_ADMIN_GATE,
- NFC_HCI_ADMIN_WHITELIST, param, 1);
- if (r < 0)
- return r;
-
- param[0] = 0x3d;
- r = nfc_hci_set_param(hdev, PN544_SYS_MGMT_GATE,
- PN544_SYS_MGMT_INFO_NOTIFICATION, param, 1);
- if (r < 0)
- return r;
-
- param[0] = 0x0;
- r = nfc_hci_set_param(hdev, NFC_HCI_RF_READER_A_GATE,
- PN544_RF_READER_A_AUTO_ACTIVATION, param, 1);
- if (r < 0)
- return r;
-
- r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
- NFC_HCI_EVT_END_OPERATION, NULL, 0);
- if (r < 0)
- return r;
-
- param[0] = 0x1;
- r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE,
- PN544_PL_NFCT_DEACTIVATED, param, 1);
- if (r < 0)
- return r;
-
- param[0] = 0x0;
- r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE,
- PN544_PL_RDPHASES, param, 1);
- if (r < 0)
- return r;
-
- r = nfc_hci_get_param(hdev, NFC_HCI_ID_MGMT_GATE,
- PN544_ID_MGMT_FULL_VERSION_SW, &skb);
- if (r < 0)
- return r;
-
- if (skb->len != FULL_VERSION_LEN) {
- kfree_skb(skb);
- return -EINVAL;
- }
-
- print_hex_dump(KERN_DEBUG, "FULL VERSION SOFTWARE INFO: ",
- DUMP_PREFIX_NONE, 16, 1,
- skb->data, FULL_VERSION_LEN, false);
-
- kfree_skb(skb);
-
- return 0;
-}
-
-static void pn544_hci_add_len_crc(struct sk_buff *skb)
-{
- u16 crc;
- int len;
-
- len = skb->len + 2;
- *skb_push(skb, 1) = len;
-
- crc = crc_ccitt(0xffff, skb->data, skb->len);
- crc = ~crc;
- *skb_put(skb, 1) = crc & 0xff;
- *skb_put(skb, 1) = crc >> 8;
-}
-
-static void pn544_hci_remove_len_crc(struct sk_buff *skb)
-{
- skb_pull(skb, PN544_FRAME_HEADROOM);
- skb_trim(skb, PN544_FRAME_TAILROOM);
-}
-
-static int pn544_hci_xmit(struct nfc_hci_dev *hdev, struct sk_buff *skb)
-{
- struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
- struct i2c_client *client = info->i2c_dev;
- int r;
-
- if (info->hard_fault != 0)
- return info->hard_fault;
-
- pn544_hci_add_len_crc(skb);
- r = pn544_hci_i2c_write(client, skb->data, skb->len);
- pn544_hci_remove_len_crc(skb);
-
- return r;
-}
-
-static int pn544_hci_start_poll(struct nfc_hci_dev *hdev,
- u32 im_protocols, u32 tm_protocols)
-{
- u8 phases = 0;
- int r;
- u8 duration[2];
- u8 activated;
- u8 i_mode = 0x3f; /* Enable all supported modes */
- u8 t_mode = 0x0f;
- u8 t_merge = 0x01; /* Enable merge by default */
-
- pr_info(DRIVER_DESC ": %s protocols 0x%x 0x%x\n",
- __func__, im_protocols, tm_protocols);
-
- r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
- NFC_HCI_EVT_END_OPERATION, NULL, 0);
- if (r < 0)
- return r;
-
- duration[0] = 0x18;
- duration[1] = 0x6a;
- r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE,
- PN544_PL_EMULATION, duration, 2);
- if (r < 0)
- return r;
-
- activated = 0;
- r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE,
- PN544_PL_NFCT_DEACTIVATED, &activated, 1);
- if (r < 0)
- return r;
-
- if (im_protocols & (NFC_PROTO_ISO14443_MASK | NFC_PROTO_MIFARE_MASK |
- NFC_PROTO_JEWEL_MASK))
- phases |= 1; /* Type A */
- if (im_protocols & NFC_PROTO_FELICA_MASK) {
- phases |= (1 << 2); /* Type F 212 */
- phases |= (1 << 3); /* Type F 424 */
- }
-
- phases |= (1 << 5); /* NFC active */
-
- r = nfc_hci_set_param(hdev, PN544_POLLING_LOOP_MGMT_GATE,
- PN544_PL_RDPHASES, &phases, 1);
- if (r < 0)
- return r;
-
- if ((im_protocols | tm_protocols) & NFC_PROTO_NFC_DEP_MASK) {
- hdev->gb = nfc_get_local_general_bytes(hdev->ndev,
- &hdev->gb_len);
- pr_debug("generate local bytes %p", hdev->gb);
- if (hdev->gb == NULL || hdev->gb_len == 0) {
- im_protocols &= ~NFC_PROTO_NFC_DEP_MASK;
- tm_protocols &= ~NFC_PROTO_NFC_DEP_MASK;
- }
- }
-
- if (im_protocols & NFC_PROTO_NFC_DEP_MASK) {
- r = nfc_hci_send_event(hdev,
- PN544_RF_READER_NFCIP1_INITIATOR_GATE,
- NFC_HCI_EVT_END_OPERATION, NULL, 0);
- if (r < 0)
- return r;
-
- r = nfc_hci_set_param(hdev,
- PN544_RF_READER_NFCIP1_INITIATOR_GATE,
- PN544_DEP_MODE, &i_mode, 1);
- if (r < 0)
- return r;
-
- r = nfc_hci_set_param(hdev,
- PN544_RF_READER_NFCIP1_INITIATOR_GATE,
- PN544_DEP_ATR_REQ, hdev->gb, hdev->gb_len);
- if (r < 0)
- return r;
-
- r = nfc_hci_send_event(hdev,
- PN544_RF_READER_NFCIP1_INITIATOR_GATE,
- NFC_HCI_EVT_READER_REQUESTED, NULL, 0);
- if (r < 0)
- nfc_hci_send_event(hdev,
- PN544_RF_READER_NFCIP1_INITIATOR_GATE,
- NFC_HCI_EVT_END_OPERATION, NULL, 0);
- }
-
- if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) {
- r = nfc_hci_set_param(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE,
- PN544_DEP_MODE, &t_mode, 1);
- if (r < 0)
- return r;
-
- r = nfc_hci_set_param(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE,
- PN544_DEP_ATR_RES, hdev->gb, hdev->gb_len);
- if (r < 0)
- return r;
-
- r = nfc_hci_set_param(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE,
- PN544_DEP_MERGE, &t_merge, 1);
- if (r < 0)
- return r;
- }
-
- r = nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
- NFC_HCI_EVT_READER_REQUESTED, NULL, 0);
- if (r < 0)
- nfc_hci_send_event(hdev, NFC_HCI_RF_READER_A_GATE,
- NFC_HCI_EVT_END_OPERATION, NULL, 0);
-
- return r;
-}
-
-static int pn544_hci_dep_link_up(struct nfc_hci_dev *hdev,
- struct nfc_target *target, u8 comm_mode,
- u8 *gb, size_t gb_len)
-{
- struct sk_buff *rgb_skb = NULL;
- int r;
-
- r = nfc_hci_get_param(hdev, target->hci_reader_gate,
- PN544_DEP_ATR_RES, &rgb_skb);
- if (r < 0)
- return r;
-
- if (rgb_skb->len == 0 || rgb_skb->len > NFC_GB_MAXSIZE) {
- r = -EPROTO;
- goto exit;
- }
- print_hex_dump(KERN_DEBUG, "remote gb: ", DUMP_PREFIX_OFFSET,
- 16, 1, rgb_skb->data, rgb_skb->len, true);
-
- r = nfc_set_remote_general_bytes(hdev->ndev, rgb_skb->data,
- rgb_skb->len);
-
- if (r == 0)
- r = nfc_dep_link_is_up(hdev->ndev, target->idx, comm_mode,
- NFC_RF_INITIATOR);
-exit:
- kfree_skb(rgb_skb);
- return r;
-}
-
-static int pn544_hci_dep_link_down(struct nfc_hci_dev *hdev)
-{
-
- return nfc_hci_send_event(hdev, PN544_RF_READER_NFCIP1_INITIATOR_GATE,
- NFC_HCI_EVT_END_OPERATION, NULL, 0);
-}
-
-static int pn544_hci_target_from_gate(struct nfc_hci_dev *hdev, u8 gate,
- struct nfc_target *target)
-{
- switch (gate) {
- case PN544_RF_READER_F_GATE:
- target->supported_protocols = NFC_PROTO_FELICA_MASK;
- break;
- case PN544_RF_READER_JEWEL_GATE:
- target->supported_protocols = NFC_PROTO_JEWEL_MASK;
- target->sens_res = 0x0c00;
- break;
- case PN544_RF_READER_NFCIP1_INITIATOR_GATE:
- target->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
- break;
- default:
- return -EPROTO;
- }
-
- return 0;
-}
-
-static int pn544_hci_complete_target_discovered(struct nfc_hci_dev *hdev,
- u8 gate,
- struct nfc_target *target)
-{
- struct sk_buff *uid_skb;
- int r = 0;
-
- if (gate == PN544_RF_READER_NFCIP1_INITIATOR_GATE)
- return r;
-
- if (target->supported_protocols & NFC_PROTO_NFC_DEP_MASK) {
- r = nfc_hci_send_cmd(hdev,
- PN544_RF_READER_NFCIP1_INITIATOR_GATE,
- PN544_HCI_CMD_CONTINUE_ACTIVATION, NULL, 0, NULL);
- if (r < 0)
- return r;
-
- target->hci_reader_gate = PN544_RF_READER_NFCIP1_INITIATOR_GATE;
- } else if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) {
- if (target->nfcid1_len != 4 && target->nfcid1_len != 7 &&
- target->nfcid1_len != 10)
- return -EPROTO;
-
- r = nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE,
- PN544_RF_READER_CMD_ACTIVATE_NEXT,
- target->nfcid1, target->nfcid1_len, NULL);
- } else if (target->supported_protocols & NFC_PROTO_FELICA_MASK) {
- r = nfc_hci_get_param(hdev, PN544_RF_READER_F_GATE,
- PN544_FELICA_ID, &uid_skb);
- if (r < 0)
- return r;
-
- if (uid_skb->len != 8) {
- kfree_skb(uid_skb);
- return -EPROTO;
- }
-
- r = nfc_hci_send_cmd(hdev, PN544_RF_READER_F_GATE,
- PN544_RF_READER_CMD_ACTIVATE_NEXT,
- uid_skb->data, uid_skb->len, NULL);
- kfree_skb(uid_skb);
-
- r = nfc_hci_send_cmd(hdev,
- PN544_RF_READER_NFCIP1_INITIATOR_GATE,
- PN544_HCI_CMD_CONTINUE_ACTIVATION,
- NULL, 0, NULL);
- if (r < 0)
- return r;
-
- target->hci_reader_gate = PN544_RF_READER_NFCIP1_INITIATOR_GATE;
- target->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
- } else if (target->supported_protocols & NFC_PROTO_ISO14443_MASK) {
- /*
- * TODO: maybe other ISO 14443 require some kind of continue
- * activation, but for now we've seen only this one below.
- */
- if (target->sens_res == 0x4403) /* Type 4 Mifare DESFire */
- r = nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE,
- PN544_RF_READER_A_CMD_CONTINUE_ACTIVATION,
- NULL, 0, NULL);
- }
-
- return r;
-}
-
-#define PN544_CB_TYPE_READER_F 1
-
-static void pn544_hci_data_exchange_cb(void *context, struct sk_buff *skb,
- int err)
-{
- struct pn544_hci_info *info = context;
-
- switch (info->async_cb_type) {
- case PN544_CB_TYPE_READER_F:
- if (err == 0)
- skb_pull(skb, 1);
- info->async_cb(info->async_cb_context, skb, err);
- break;
- default:
- if (err == 0)
- kfree_skb(skb);
- break;
- }
-}
-
-#define MIFARE_CMD_AUTH_KEY_A 0x60
-#define MIFARE_CMD_AUTH_KEY_B 0x61
-#define MIFARE_CMD_HEADER 2
-#define MIFARE_UID_LEN 4
-#define MIFARE_KEY_LEN 6
-#define MIFARE_CMD_LEN 12
-/*
- * Returns:
- * <= 0: driver handled the data exchange
- * 1: driver doesn't especially handle, please do standard processing
- */
-static int pn544_hci_im_transceive(struct nfc_hci_dev *hdev,
- struct nfc_target *target,
- struct sk_buff *skb, data_exchange_cb_t cb,
- void *cb_context)
-{
- struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
-
- pr_info(DRIVER_DESC ": %s for gate=%d\n", __func__,
- target->hci_reader_gate);
-
- switch (target->hci_reader_gate) {
- case NFC_HCI_RF_READER_A_GATE:
- if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) {
- /*
- * It seems that pn544 is inverting key and UID for
- * MIFARE authentication commands.
- */
- if (skb->len == MIFARE_CMD_LEN &&
- (skb->data[0] == MIFARE_CMD_AUTH_KEY_A ||
- skb->data[0] == MIFARE_CMD_AUTH_KEY_B)) {
- u8 uid[MIFARE_UID_LEN];
- u8 *data = skb->data + MIFARE_CMD_HEADER;
-
- memcpy(uid, data + MIFARE_KEY_LEN,
- MIFARE_UID_LEN);
- memmove(data + MIFARE_UID_LEN, data,
- MIFARE_KEY_LEN);
- memcpy(data, uid, MIFARE_UID_LEN);
- }
-
- return nfc_hci_send_cmd_async(hdev,
- target->hci_reader_gate,
- PN544_MIFARE_CMD,
- skb->data, skb->len,
- cb, cb_context);
- } else
- return 1;
- case PN544_RF_READER_F_GATE:
- *skb_push(skb, 1) = 0;
- *skb_push(skb, 1) = 0;
-
- info->async_cb_type = PN544_CB_TYPE_READER_F;
- info->async_cb = cb;
- info->async_cb_context = cb_context;
-
- return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
- PN544_FELICA_RAW, skb->data,
- skb->len,
- pn544_hci_data_exchange_cb, info);
- case PN544_RF_READER_JEWEL_GATE:
- return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
- PN544_JEWEL_RAW_CMD, skb->data,
- skb->len, cb, cb_context);
- case PN544_RF_READER_NFCIP1_INITIATOR_GATE:
- *skb_push(skb, 1) = 0;
-
- return nfc_hci_send_event(hdev, target->hci_reader_gate,
- PN544_HCI_EVT_SND_DATA, skb->data,
- skb->len);
- default:
- return 1;
- }
-}
-
-static int pn544_hci_tm_send(struct nfc_hci_dev *hdev, struct sk_buff *skb)
-{
- /* Set default false for multiple information chaining */
- *skb_push(skb, 1) = 0;
-
- return nfc_hci_send_event(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE,
- PN544_HCI_EVT_SND_DATA, skb->data, skb->len);
-}
-
-static int pn544_hci_check_presence(struct nfc_hci_dev *hdev,
- struct nfc_target *target)
-{
- pr_debug("supported protocol %d", target->supported_protocols);
- if (target->supported_protocols & (NFC_PROTO_ISO14443_MASK |
- NFC_PROTO_ISO14443_B_MASK)) {
- return nfc_hci_send_cmd(hdev, target->hci_reader_gate,
- PN544_RF_READER_CMD_PRESENCE_CHECK,
- NULL, 0, NULL);
- } else if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) {
- if (target->nfcid1_len != 4 && target->nfcid1_len != 7 &&
- target->nfcid1_len != 10)
- return -EOPNOTSUPP;
-
- return nfc_hci_send_cmd(hdev, NFC_HCI_RF_READER_A_GATE,
- PN544_RF_READER_CMD_ACTIVATE_NEXT,
- target->nfcid1, target->nfcid1_len, NULL);
- } else if (target->supported_protocols & NFC_PROTO_JEWEL_MASK) {
- return nfc_hci_send_cmd(hdev, target->hci_reader_gate,
- PN544_JEWEL_RAW_CMD, NULL, 0, NULL);
- } else if (target->supported_protocols & NFC_PROTO_FELICA_MASK) {
- return nfc_hci_send_cmd(hdev, PN544_RF_READER_F_GATE,
- PN544_FELICA_RAW, NULL, 0, NULL);
- } else if (target->supported_protocols & NFC_PROTO_NFC_DEP_MASK) {
- return nfc_hci_send_cmd(hdev, target->hci_reader_gate,
- PN544_HCI_CMD_ATTREQUEST,
- NULL, 0, NULL);
- }
-
- return 0;
-}
-
-void pn544_hci_event_received(struct nfc_hci_dev *hdev, u8 gate, u8 event,
- struct sk_buff *skb)
-{
- struct sk_buff *rgb_skb = NULL;
- int r = 0;
-
- pr_debug("hci event %d", event);
- switch (event) {
- case PN544_HCI_EVT_ACTIVATED:
- if (gate == PN544_RF_READER_NFCIP1_INITIATOR_GATE)
- nfc_hci_target_discovered(hdev, gate);
- else if (gate == PN544_RF_READER_NFCIP1_TARGET_GATE) {
- r = nfc_hci_get_param(hdev, gate, PN544_DEP_ATR_REQ,
- &rgb_skb);
-
- if (r < 0)
- goto exit;
-
- nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK,
- NFC_COMM_PASSIVE, rgb_skb->data,
- rgb_skb->len);
-
- kfree_skb(rgb_skb);
- }
-
- break;
- case PN544_HCI_EVT_DEACTIVATED:
- nfc_hci_send_event(hdev, gate,
- NFC_HCI_EVT_END_OPERATION, NULL, 0);
- break;
- case PN544_HCI_EVT_RCV_DATA:
- if (skb->len < 2) {
- r = -EPROTO;
- goto exit;
- }
-
- if (skb->data[0] != 0) {
- pr_debug("data0 %d", skb->data[0]);
- r = -EPROTO;
- goto exit;
- }
-
- skb_pull(skb, 2);
- nfc_tm_data_received(hdev->ndev, skb);
-
- return;
- default:
- break;
- }
-
-exit:
- kfree_skb(skb);
-}
-
-static struct nfc_hci_ops pn544_hci_ops = {
- .open = pn544_hci_open,
- .close = pn544_hci_close,
- .hci_ready = pn544_hci_ready,
- .xmit = pn544_hci_xmit,
- .start_poll = pn544_hci_start_poll,
- .dep_link_up = pn544_hci_dep_link_up,
- .dep_link_down = pn544_hci_dep_link_down,
- .target_from_gate = pn544_hci_target_from_gate,
- .complete_target_discovered = pn544_hci_complete_target_discovered,
- .im_transceive = pn544_hci_im_transceive,
- .tm_send = pn544_hci_tm_send,
- .check_presence = pn544_hci_check_presence,
- .event_received = pn544_hci_event_received,
-};
-
-static int __devinit pn544_hci_probe(struct i2c_client *client,
- const struct i2c_device_id *id)
-{
- struct pn544_hci_info *info;
- struct pn544_nfc_platform_data *pdata;
- int r = 0;
- u32 protocols;
- struct nfc_hci_init_data init_data;
-
- dev_dbg(&client->dev, "%s\n", __func__);
- dev_dbg(&client->dev, "IRQ: %d\n", client->irq);
-
- if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
- dev_err(&client->dev, "Need I2C_FUNC_I2C\n");
- return -ENODEV;
- }
-
- info = kzalloc(sizeof(struct pn544_hci_info), GFP_KERNEL);
- if (!info) {
- dev_err(&client->dev,
- "Cannot allocate memory for pn544_hci_info.\n");
- r = -ENOMEM;
- goto err_info_alloc;
- }
-
- info->i2c_dev = client;
- info->state = PN544_ST_COLD;
- mutex_init(&info->info_lock);
- i2c_set_clientdata(client, info);
-
- pdata = client->dev.platform_data;
- if (pdata == NULL) {
- dev_err(&client->dev, "No platform data\n");
- r = -EINVAL;
- goto err_pdata;
- }
-
- if (pdata->request_resources == NULL) {
- dev_err(&client->dev, "request_resources() missing\n");
- r = -EINVAL;
- goto err_pdata;
- }
-
- r = pdata->request_resources(client);
- if (r) {
- dev_err(&client->dev, "Cannot get platform resources\n");
- goto err_pdata;
- }
-
- info->gpio_en = pdata->get_gpio(NFC_GPIO_ENABLE);
- info->gpio_fw = pdata->get_gpio(NFC_GPIO_FW_RESET);
- info->gpio_irq = pdata->get_gpio(NFC_GPIO_IRQ);
-
- pn544_hci_platform_init(info);
-
- r = request_threaded_irq(client->irq, NULL, pn544_hci_irq_thread_fn,
- IRQF_TRIGGER_RISING | IRQF_ONESHOT,
- PN544_HCI_DRIVER_NAME, info);
- if (r < 0) {
- dev_err(&client->dev, "Unable to register IRQ handler\n");
- goto err_rti;
- }
-
- init_data.gate_count = ARRAY_SIZE(pn544_gates);
-
- memcpy(init_data.gates, pn544_gates, sizeof(pn544_gates));
-
- /*
- * TODO: Session id must include the driver name + some bus addr
- * persistent info to discriminate 2 identical chips
- */
- strcpy(init_data.session_id, "ID544HCI");
-
- 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;
-
- info->hdev = nfc_hci_allocate_device(&pn544_hci_ops, &init_data,
- protocols, LLC_SHDLC_NAME,
- PN544_FRAME_HEADROOM +
- PN544_CMDS_HEADROOM,
- PN544_FRAME_TAILROOM,
- PN544_HCI_LLC_MAX_PAYLOAD);
- if (!info->hdev) {
- dev_err(&client->dev, "Cannot allocate nfc hdev.\n");
- r = -ENOMEM;
- goto err_alloc_hdev;
- }
-
- nfc_hci_set_clientdata(info->hdev, info);
-
- r = nfc_hci_register_device(info->hdev);
- if (r)
- goto err_regdev;
-
- return 0;
-
-err_regdev:
- nfc_hci_free_device(info->hdev);
-
-err_alloc_hdev:
- free_irq(client->irq, info);
-
-err_rti:
- if (pdata->free_resources != NULL)
- pdata->free_resources();
-
-err_pdata:
- kfree(info);
-
-err_info_alloc:
- return r;
-}
-
-static __devexit int pn544_hci_remove(struct i2c_client *client)
-{
- struct pn544_hci_info *info = i2c_get_clientdata(client);
- struct pn544_nfc_platform_data *pdata = client->dev.platform_data;
-
- dev_dbg(&client->dev, "%s\n", __func__);
-
- nfc_hci_free_device(info->hdev);
-
- if (info->state != PN544_ST_COLD) {
- if (pdata->disable)
- pdata->disable();
- }
-
- free_irq(client->irq, info);
- if (pdata->free_resources)
- pdata->free_resources();
-
- kfree(info);
-
- return 0;
-}
-
-static struct i2c_driver pn544_hci_driver = {
- .driver = {
- .name = PN544_HCI_DRIVER_NAME,
- },
- .probe = pn544_hci_probe,
- .id_table = pn544_hci_id_table,
- .remove = __devexit_p(pn544_hci_remove),
-};
-
-static int __init pn544_hci_init(void)
-{
- int r;
-
- pr_debug(DRIVER_DESC ": %s\n", __func__);
-
- r = i2c_add_driver(&pn544_hci_driver);
- if (r) {
- pr_err(PN544_HCI_DRIVER_NAME ": driver registration failed\n");
- return r;
- }
-
- return 0;
-}
-
-static void __exit pn544_hci_exit(void)
-{
- i2c_del_driver(&pn544_hci_driver);
-}
-
-module_init(pn544_hci_init);
-module_exit(pn544_hci_exit);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION(DRIVER_DESC);
#include <net/nfc/nfc.h>
+struct nfc_phy_ops {
+ int (*write)(void *dev_id, struct sk_buff *skb);
+ int (*enable)(void *dev_id);
+ void (*disable)(void *dev_id);
+};
+
struct nfc_hci_dev;
struct nfc_hci_ops {
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