--- /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, see <http://www.gnu.org/licenses/>.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/delay.h>
+#include <linux/slab.h>
+#include <linux/module.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
+
+enum pn544_state {
+ PN544_ST_COLD,
+ PN544_ST_FW_READY,
+ PN544_ST_READY,
+};
+
+#define FULL_VERSION_LEN 11
+
+/* Proprietary commands */
+#define PN544_WRITE 0x3f
+#define PN544_TEST_SWP 0x21
+
+/* 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_SWP_DEFAULT_MODE 0x01
+
+#define PN544_NFC_WI_MGMT_GATE 0xA1
+#define PN544_NFC_ESE_DEFAULT_MODE 0x01
+
+#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_EVT_SWITCH_MODE 0x03
+
+#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;
+
+ fw_download_t fw_download;
+};
+
+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},
+
+ {{0x9c, 0x01}, 0x08},
+
+ {{0x9e, 0xaa}, 0x01},
+
+ {{0x9b, 0xd1}, 0x17},
+ {{0x9b, 0xd2}, 0x58},
+ {{0x9b, 0xd3}, 0x10},
+ {{0x9b, 0xd4}, 0x47},
+ {{0x9b, 0xd5}, 0x0c},
+ {{0x9b, 0xd6}, 0x37},
+ {{0x9b, 0xdd}, 0x33},
+
+ {{0x9b, 0x84}, 0x00},
+ {{0x99, 0x81}, 0x79},
+ {{0x99, 0x31}, 0x79},
+
+ {{0x98, 0x00}, 0x3f},
+
+ {{0x9f, 0x09}, 0x02},
+
+ {{0x9f, 0x0a}, 0x05},
+
+ {{0x9e, 0xd1}, 0xa1},
+ {{0x99, 0x23}, 0x01},
+
+ {{0x9e, 0x74}, 0x00},
+ {{0x9e, 0x90}, 0x00},
+ {{0x9f, 0x28}, 0x10},
+
+ {{0x9f, 0x35}, 0x04},
+
+ {{0x9f, 0x36}, 0x11},
+
+ {{0x9c, 0x31}, 0x00},
+
+ {{0x9c, 0x32}, 0x00},
+
+ {{0x9c, 0x19}, 0x0a},
+
+ {{0x9c, 0x1a}, 0x0a},
+
+ {{0x9c, 0x0c}, 0x00},
+
+ {{0x9c, 0x0d}, 0x00},
+
+ {{0x9c, 0x12}, 0x00},
+
+ {{0x9c, 0x13}, 0x00},
+
+ {{0x98, 0xa2}, 0x09},
+
+ {{0x98, 0x93}, 0x00},
+
+ {{0x98, 0x7d}, 0x08},
+ {{0x98, 0x7e}, 0x00},
+ {{0x9f, 0xc8}, 0x00},
+ };
+ 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\n", 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;
+ }
+
+ /* Type F NFC-DEP IDm has prefix 0x01FE */
+ if ((uid_skb->data[0] == 0x01) && (uid_skb->data[1] == 0xfe)) {
+ 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->supported_protocols = NFC_PROTO_NFC_DEP_MASK;
+ target->hci_reader_gate =
+ PN544_RF_READER_NFCIP1_INITIATOR_GATE;
+ } else {
+ 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);
+ }
+ } 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)
+{
+ int r;
+
+ /* Set default false for multiple information chaining */
+ *skb_push(skb, 1) = 0;
+
+ r = nfc_hci_send_event(hdev, PN544_RF_READER_NFCIP1_TARGET_GATE,
+ PN544_HCI_EVT_SND_DATA, skb->data, skb->len);
+
+ kfree_skb(skb);
+
+ return r;
+}
+
+static int pn544_hci_check_presence(struct nfc_hci_dev *hdev,
+ struct nfc_target *target)
+{
+ pr_debug("supported protocol %d\b", 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 |
+ NFC_PROTO_FELICA_MASK)) {
+ return -EOPNOTSUPP;
+ } 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;
+}
+
+/*
+ * Returns:
+ * <= 0: driver handled the event, skb consumed
+ * 1: driver does not handle the event, please do standard processing
+ */
+static int pn544_hci_event_received(struct nfc_hci_dev *hdev, u8 pipe, u8 event,
+ struct sk_buff *skb)
+{
+ struct sk_buff *rgb_skb = NULL;
+ u8 gate = hdev->pipes[pipe].gate;
+ int r;
+
+ pr_debug("hci event %d\n", event);
+ switch (event) {
+ case PN544_HCI_EVT_ACTIVATED:
+ if (gate == PN544_RF_READER_NFCIP1_INITIATOR_GATE) {
+ r = 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;
+
+ r = nfc_tm_activated(hdev->ndev, NFC_PROTO_NFC_DEP_MASK,
+ NFC_COMM_PASSIVE, rgb_skb->data,
+ rgb_skb->len);
+
+ kfree_skb(rgb_skb);
+ } else {
+ r = -EINVAL;
+ }
+ break;
+ case PN544_HCI_EVT_DEACTIVATED:
+ r = 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\n", skb->data[0]);
+ r = -EPROTO;
+ goto exit;
+ }
+
+ skb_pull(skb, 2);
+ return nfc_tm_data_received(hdev->ndev, skb);
+ default:
+ return 1;
+ }
+
+exit:
+ kfree_skb(skb);
+
+ return r;
+}
+
+static int pn544_hci_fw_download(struct nfc_hci_dev *hdev,
+ const char *firmware_name)
+{
+ struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
+
+ if (info->fw_download == NULL)
+ return -ENOTSUPP;
+
+ return info->fw_download(info->phy_id, firmware_name, hdev->sw_romlib);
+}
+
+static int pn544_hci_discover_se(struct nfc_hci_dev *hdev)
+{
+ u32 se_idx = 0;
+ u8 ese_mode = 0x01; /* Default mode */
+ struct sk_buff *res_skb;
+ int r;
+
+ r = nfc_hci_send_cmd(hdev, PN544_SYS_MGMT_GATE, PN544_TEST_SWP,
+ NULL, 0, &res_skb);
+
+ if (r == 0) {
+ if (res_skb->len == 2 && res_skb->data[0] == 0x00)
+ nfc_add_se(hdev->ndev, se_idx++, NFC_SE_UICC);
+
+ kfree_skb(res_skb);
+ }
+
+ r = nfc_hci_send_event(hdev, PN544_NFC_WI_MGMT_GATE,
+ PN544_HCI_EVT_SWITCH_MODE,
+ &ese_mode, 1);
+ if (r == 0)
+ nfc_add_se(hdev->ndev, se_idx++, NFC_SE_EMBEDDED);
+
+ return !se_idx;
+}
+
+#define PN544_SE_MODE_OFF 0x00
+#define PN544_SE_MODE_ON 0x01
+static int pn544_hci_enable_se(struct nfc_hci_dev *hdev, u32 se_idx)
+{
+ struct nfc_se *se;
+ u8 enable = PN544_SE_MODE_ON;
+ static struct uicc_gatelist {
+ u8 head;
+ u8 adr[2];
+ u8 value;
+ } uicc_gatelist[] = {
+ {0x00, {0x9e, 0xd9}, 0x23},
+ {0x00, {0x9e, 0xda}, 0x21},
+ {0x00, {0x9e, 0xdb}, 0x22},
+ {0x00, {0x9e, 0xdc}, 0x24},
+ };
+ struct uicc_gatelist *p = uicc_gatelist;
+ int count = ARRAY_SIZE(uicc_gatelist);
+ struct sk_buff *res_skb;
+ int r;
+
+ se = nfc_find_se(hdev->ndev, se_idx);
+
+ switch (se->type) {
+ case NFC_SE_UICC:
+ while (count--) {
+ r = nfc_hci_send_cmd(hdev, PN544_SYS_MGMT_GATE,
+ PN544_WRITE, (u8 *)p, 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++;
+ }
+
+ return nfc_hci_set_param(hdev, PN544_SWP_MGMT_GATE,
+ PN544_SWP_DEFAULT_MODE, &enable, 1);
+ case NFC_SE_EMBEDDED:
+ return nfc_hci_set_param(hdev, PN544_NFC_WI_MGMT_GATE,
+ PN544_NFC_ESE_DEFAULT_MODE, &enable, 1);
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int pn544_hci_disable_se(struct nfc_hci_dev *hdev, u32 se_idx)
+{
+ struct nfc_se *se;
+ u8 disable = PN544_SE_MODE_OFF;
+
+ se = nfc_find_se(hdev->ndev, se_idx);
+
+ switch (se->type) {
+ case NFC_SE_UICC:
+ return nfc_hci_set_param(hdev, PN544_SWP_MGMT_GATE,
+ PN544_SWP_DEFAULT_MODE, &disable, 1);
+ case NFC_SE_EMBEDDED:
+ return nfc_hci_set_param(hdev, PN544_NFC_WI_MGMT_GATE,
+ PN544_NFC_ESE_DEFAULT_MODE, &disable, 1);
+ default:
+ return -EINVAL;
+ }
+}
+
+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,
+ .fw_download = pn544_hci_fw_download,
+ .discover_se = pn544_hci_discover_se,
+ .enable_se = pn544_hci_enable_se,
+ .disable_se = pn544_hci_disable_se,
+};
+
+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,
+ fw_download_t fw_download, 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) {
+ r = -ENOMEM;
+ goto err_info_alloc;
+ }
+
+ info->phy_ops = phy_ops;
+ info->phy_id = phy_id;
+ info->fw_download = fw_download;
+ 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, 0,
+ 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;
+}
+EXPORT_SYMBOL(pn544_hci_probe);
+
+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);
+}
+EXPORT_SYMBOL(pn544_hci_remove);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION(DRIVER_DESC);
Code Review / kvmfornfv.git / blobdiff