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-rw-r--r--net/nfc/Kconfig14
-rw-r--r--net/nfc/Makefile2
-rw-r--r--net/nfc/core.c22
-rw-r--r--net/nfc/digital.h170
-rw-r--r--net/nfc/digital_core.c737
-rw-r--r--net/nfc/digital_dep.c729
-rw-r--r--net/nfc/digital_technology.c770
-rw-r--r--net/nfc/nci/spi.c239
-rw-r--r--net/nfc/netlink.c130
-rw-r--r--net/nfc/rawsock.c7
10 files changed, 2646 insertions, 174 deletions
diff --git a/net/nfc/Kconfig b/net/nfc/Kconfig
index 5948b2fc72f..6e0fa0cce19 100644
--- a/net/nfc/Kconfig
+++ b/net/nfc/Kconfig
@@ -14,6 +14,20 @@ menuconfig NFC
To compile this support as a module, choose M here: the module will
be called nfc.
+config NFC_DIGITAL
+ depends on NFC
+ select CRC_CCITT
+ select CRC_ITU_T
+ tristate "NFC Digital Protocol stack support"
+ default n
+ help
+ Say Y if you want to build NFC digital protocol stack support.
+ This is needed by NFC chipsets whose firmware only implement
+ the NFC analog layer.
+
+ To compile this support as a module, choose M here: the module will
+ be called nfc_digital.
+
source "net/nfc/nci/Kconfig"
source "net/nfc/hci/Kconfig"
diff --git a/net/nfc/Makefile b/net/nfc/Makefile
index a76f4533cb6..2555ff8e721 100644
--- a/net/nfc/Makefile
+++ b/net/nfc/Makefile
@@ -5,7 +5,9 @@
obj-$(CONFIG_NFC) += nfc.o
obj-$(CONFIG_NFC_NCI) += nci/
obj-$(CONFIG_NFC_HCI) += hci/
+obj-$(CONFIG_NFC_DIGITAL) += nfc_digital.o
nfc-objs := core.o netlink.o af_nfc.o rawsock.o llcp_core.o llcp_commands.o \
llcp_sock.o
+nfc_digital-objs := digital_core.o digital_technology.o digital_dep.o
diff --git a/net/nfc/core.c b/net/nfc/core.c
index e92923cf3e0..872529105ab 100644
--- a/net/nfc/core.c
+++ b/net/nfc/core.c
@@ -384,6 +384,19 @@ int nfc_dep_link_is_up(struct nfc_dev *dev, u32 target_idx,
{
dev->dep_link_up = true;
+ if (!dev->active_target) {
+ struct nfc_target *target;
+
+ target = nfc_find_target(dev, target_idx);
+ if (target == NULL)
+ return -ENOTCONN;
+
+ dev->active_target = target;
+ }
+
+ dev->polling = false;
+ dev->rf_mode = rf_mode;
+
nfc_llcp_mac_is_up(dev, target_idx, comm_mode, rf_mode);
return nfc_genl_dep_link_up_event(dev, target_idx, comm_mode, rf_mode);
@@ -536,7 +549,7 @@ error:
return rc;
}
-static struct nfc_se *find_se(struct nfc_dev *dev, u32 se_idx)
+struct nfc_se *nfc_find_se(struct nfc_dev *dev, u32 se_idx)
{
struct nfc_se *se, *n;
@@ -546,6 +559,7 @@ static struct nfc_se *find_se(struct nfc_dev *dev, u32 se_idx)
return NULL;
}
+EXPORT_SYMBOL(nfc_find_se);
int nfc_enable_se(struct nfc_dev *dev, u32 se_idx)
{
@@ -577,7 +591,7 @@ int nfc_enable_se(struct nfc_dev *dev, u32 se_idx)
goto error;
}
- se = find_se(dev, se_idx);
+ se = nfc_find_se(dev, se_idx);
if (!se) {
rc = -EINVAL;
goto error;
@@ -622,7 +636,7 @@ int nfc_disable_se(struct nfc_dev *dev, u32 se_idx)
goto error;
}
- se = find_se(dev, se_idx);
+ se = nfc_find_se(dev, se_idx);
if (!se) {
rc = -EINVAL;
goto error;
@@ -881,7 +895,7 @@ int nfc_add_se(struct nfc_dev *dev, u32 se_idx, u16 type)
pr_debug("%s se index %d\n", dev_name(&dev->dev), se_idx);
- se = find_se(dev, se_idx);
+ se = nfc_find_se(dev, se_idx);
if (se)
return -EALREADY;
diff --git a/net/nfc/digital.h b/net/nfc/digital.h
new file mode 100644
index 00000000000..08b29b55ea6
--- /dev/null
+++ b/net/nfc/digital.h
@@ -0,0 +1,170 @@
+/*
+ * NFC Digital Protocol stack
+ * Copyright (c) 2013, Intel Corporation.
+ *
+ * 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 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.
+ *
+ */
+
+#ifndef __DIGITAL_H
+#define __DIGITAL_H
+
+#include <net/nfc/nfc.h>
+#include <net/nfc/digital.h>
+
+#include <linux/crc-ccitt.h>
+#include <linux/crc-itu-t.h>
+
+#define PROTOCOL_ERR(req) pr_err("%d: NFC Digital Protocol error: %s\n", \
+ __LINE__, req)
+
+#define DIGITAL_CMD_IN_SEND 0
+#define DIGITAL_CMD_TG_SEND 1
+#define DIGITAL_CMD_TG_LISTEN 2
+#define DIGITAL_CMD_TG_LISTEN_MDAA 3
+
+#define DIGITAL_MAX_HEADER_LEN 7
+#define DIGITAL_CRC_LEN 2
+
+#define DIGITAL_SENSF_NFCID2_NFC_DEP_B1 0x01
+#define DIGITAL_SENSF_NFCID2_NFC_DEP_B2 0xFE
+
+#define DIGITAL_SENS_RES_NFC_DEP 0x0100
+#define DIGITAL_SEL_RES_NFC_DEP 0x40
+#define DIGITAL_SENSF_FELICA_SC 0xFFFF
+
+#define DIGITAL_DRV_CAPS_IN_CRC(ddev) \
+ ((ddev)->driver_capabilities & NFC_DIGITAL_DRV_CAPS_IN_CRC)
+#define DIGITAL_DRV_CAPS_TG_CRC(ddev) \
+ ((ddev)->driver_capabilities & NFC_DIGITAL_DRV_CAPS_TG_CRC)
+
+struct digital_data_exch {
+ data_exchange_cb_t cb;
+ void *cb_context;
+};
+
+struct sk_buff *digital_skb_alloc(struct nfc_digital_dev *ddev,
+ unsigned int len);
+
+int digital_send_cmd(struct nfc_digital_dev *ddev, u8 cmd_type,
+ struct sk_buff *skb, struct digital_tg_mdaa_params *params,
+ u16 timeout, nfc_digital_cmd_complete_t cmd_cb,
+ void *cb_context);
+
+int digital_in_configure_hw(struct nfc_digital_dev *ddev, int type, int param);
+static inline int digital_in_send_cmd(struct nfc_digital_dev *ddev,
+ struct sk_buff *skb, u16 timeout,
+ nfc_digital_cmd_complete_t cmd_cb,
+ void *cb_context)
+{
+ return digital_send_cmd(ddev, DIGITAL_CMD_IN_SEND, skb, NULL, timeout,
+ cmd_cb, cb_context);
+}
+
+void digital_poll_next_tech(struct nfc_digital_dev *ddev);
+
+int digital_in_send_sens_req(struct nfc_digital_dev *ddev, u8 rf_tech);
+int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech);
+
+int digital_target_found(struct nfc_digital_dev *ddev,
+ struct nfc_target *target, u8 protocol);
+
+int digital_in_recv_mifare_res(struct sk_buff *resp);
+
+int digital_in_send_atr_req(struct nfc_digital_dev *ddev,
+ struct nfc_target *target, __u8 comm_mode, __u8 *gb,
+ size_t gb_len);
+int digital_in_send_dep_req(struct nfc_digital_dev *ddev,
+ struct nfc_target *target, struct sk_buff *skb,
+ struct digital_data_exch *data_exch);
+
+int digital_tg_configure_hw(struct nfc_digital_dev *ddev, int type, int param);
+static inline int digital_tg_send_cmd(struct nfc_digital_dev *ddev,
+ struct sk_buff *skb, u16 timeout,
+ nfc_digital_cmd_complete_t cmd_cb, void *cb_context)
+{
+ return digital_send_cmd(ddev, DIGITAL_CMD_TG_SEND, skb, NULL, timeout,
+ cmd_cb, cb_context);
+}
+
+void digital_tg_recv_sens_req(struct nfc_digital_dev *ddev, void *arg,
+ struct sk_buff *resp);
+
+void digital_tg_recv_sensf_req(struct nfc_digital_dev *ddev, void *arg,
+ struct sk_buff *resp);
+
+static inline int digital_tg_listen(struct nfc_digital_dev *ddev, u16 timeout,
+ nfc_digital_cmd_complete_t cb, void *arg)
+{
+ return digital_send_cmd(ddev, DIGITAL_CMD_TG_LISTEN, NULL, NULL,
+ timeout, cb, arg);
+}
+
+void digital_tg_recv_atr_req(struct nfc_digital_dev *ddev, void *arg,
+ struct sk_buff *resp);
+
+int digital_tg_send_dep_res(struct nfc_digital_dev *ddev, struct sk_buff *skb);
+
+int digital_tg_listen_nfca(struct nfc_digital_dev *ddev, u8 rf_tech);
+int digital_tg_listen_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech);
+
+typedef u16 (*crc_func_t)(u16, const u8 *, size_t);
+
+#define CRC_A_INIT 0x6363
+#define CRC_B_INIT 0xFFFF
+#define CRC_F_INIT 0x0000
+
+void digital_skb_add_crc(struct sk_buff *skb, crc_func_t crc_func, u16 init,
+ u8 bitwise_inv, u8 msb_first);
+
+static inline void digital_skb_add_crc_a(struct sk_buff *skb)
+{
+ digital_skb_add_crc(skb, crc_ccitt, CRC_A_INIT, 0, 0);
+}
+
+static inline void digital_skb_add_crc_b(struct sk_buff *skb)
+{
+ digital_skb_add_crc(skb, crc_ccitt, CRC_B_INIT, 1, 0);
+}
+
+static inline void digital_skb_add_crc_f(struct sk_buff *skb)
+{
+ digital_skb_add_crc(skb, crc_itu_t, CRC_F_INIT, 0, 1);
+}
+
+static inline void digital_skb_add_crc_none(struct sk_buff *skb)
+{
+ return;
+}
+
+int digital_skb_check_crc(struct sk_buff *skb, crc_func_t crc_func,
+ u16 crc_init, u8 bitwise_inv, u8 msb_first);
+
+static inline int digital_skb_check_crc_a(struct sk_buff *skb)
+{
+ return digital_skb_check_crc(skb, crc_ccitt, CRC_A_INIT, 0, 0);
+}
+
+static inline int digital_skb_check_crc_b(struct sk_buff *skb)
+{
+ return digital_skb_check_crc(skb, crc_ccitt, CRC_B_INIT, 1, 0);
+}
+
+static inline int digital_skb_check_crc_f(struct sk_buff *skb)
+{
+ return digital_skb_check_crc(skb, crc_itu_t, CRC_F_INIT, 0, 1);
+}
+
+static inline int digital_skb_check_crc_none(struct sk_buff *skb)
+{
+ return 0;
+}
+
+#endif /* __DIGITAL_H */
diff --git a/net/nfc/digital_core.c b/net/nfc/digital_core.c
new file mode 100644
index 00000000000..09fc9543995
--- /dev/null
+++ b/net/nfc/digital_core.c
@@ -0,0 +1,737 @@
+/*
+ * NFC Digital Protocol stack
+ * Copyright (c) 2013, Intel Corporation.
+ *
+ * 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 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.
+ *
+ */
+
+#define pr_fmt(fmt) "digital: %s: " fmt, __func__
+
+#include <linux/module.h>
+
+#include "digital.h"
+
+#define DIGITAL_PROTO_NFCA_RF_TECH \
+ (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK | NFC_PROTO_NFC_DEP_MASK)
+
+#define DIGITAL_PROTO_NFCF_RF_TECH \
+ (NFC_PROTO_FELICA_MASK | NFC_PROTO_NFC_DEP_MASK)
+
+struct digital_cmd {
+ struct list_head queue;
+
+ u8 type;
+ u8 pending;
+
+ u16 timeout;
+ struct sk_buff *req;
+ struct sk_buff *resp;
+ struct digital_tg_mdaa_params *mdaa_params;
+
+ nfc_digital_cmd_complete_t cmd_cb;
+ void *cb_context;
+};
+
+struct sk_buff *digital_skb_alloc(struct nfc_digital_dev *ddev,
+ unsigned int len)
+{
+ struct sk_buff *skb;
+
+ skb = alloc_skb(len + ddev->tx_headroom + ddev->tx_tailroom,
+ GFP_KERNEL);
+ if (skb)
+ skb_reserve(skb, ddev->tx_headroom);
+
+ return skb;
+}
+
+void digital_skb_add_crc(struct sk_buff *skb, crc_func_t crc_func, u16 init,
+ u8 bitwise_inv, u8 msb_first)
+{
+ u16 crc;
+
+ crc = crc_func(init, skb->data, skb->len);
+
+ if (bitwise_inv)
+ crc = ~crc;
+
+ if (msb_first)
+ crc = __fswab16(crc);
+
+ *skb_put(skb, 1) = crc & 0xFF;
+ *skb_put(skb, 1) = (crc >> 8) & 0xFF;
+}
+
+int digital_skb_check_crc(struct sk_buff *skb, crc_func_t crc_func,
+ u16 crc_init, u8 bitwise_inv, u8 msb_first)
+{
+ int rc;
+ u16 crc;
+
+ if (skb->len <= 2)
+ return -EIO;
+
+ crc = crc_func(crc_init, skb->data, skb->len - 2);
+
+ if (bitwise_inv)
+ crc = ~crc;
+
+ if (msb_first)
+ crc = __swab16(crc);
+
+ rc = (skb->data[skb->len - 2] - (crc & 0xFF)) +
+ (skb->data[skb->len - 1] - ((crc >> 8) & 0xFF));
+
+ if (rc)
+ return -EIO;
+
+ skb_trim(skb, skb->len - 2);
+
+ return 0;
+}
+
+static inline void digital_switch_rf(struct nfc_digital_dev *ddev, bool on)
+{
+ ddev->ops->switch_rf(ddev, on);
+}
+
+static inline void digital_abort_cmd(struct nfc_digital_dev *ddev)
+{
+ ddev->ops->abort_cmd(ddev);
+}
+
+static void digital_wq_cmd_complete(struct work_struct *work)
+{
+ struct digital_cmd *cmd;
+ struct nfc_digital_dev *ddev = container_of(work,
+ struct nfc_digital_dev,
+ cmd_complete_work);
+
+ mutex_lock(&ddev->cmd_lock);
+
+ cmd = list_first_entry_or_null(&ddev->cmd_queue, struct digital_cmd,
+ queue);
+ if (!cmd) {
+ mutex_unlock(&ddev->cmd_lock);
+ return;
+ }
+
+ list_del(&cmd->queue);
+
+ mutex_unlock(&ddev->cmd_lock);
+
+ if (!IS_ERR(cmd->resp))
+ print_hex_dump_debug("DIGITAL RX: ", DUMP_PREFIX_NONE, 16, 1,
+ cmd->resp->data, cmd->resp->len, false);
+
+ cmd->cmd_cb(ddev, cmd->cb_context, cmd->resp);
+
+ kfree(cmd->mdaa_params);
+ kfree(cmd);
+
+ schedule_work(&ddev->cmd_work);
+}
+
+static void digital_send_cmd_complete(struct nfc_digital_dev *ddev,
+ void *arg, struct sk_buff *resp)
+{
+ struct digital_cmd *cmd = arg;
+
+ cmd->resp = resp;
+
+ schedule_work(&ddev->cmd_complete_work);
+}
+
+static void digital_wq_cmd(struct work_struct *work)
+{
+ int rc;
+ struct digital_cmd *cmd;
+ struct digital_tg_mdaa_params *params;
+ struct nfc_digital_dev *ddev = container_of(work,
+ struct nfc_digital_dev,
+ cmd_work);
+
+ mutex_lock(&ddev->cmd_lock);
+
+ cmd = list_first_entry_or_null(&ddev->cmd_queue, struct digital_cmd,
+ queue);
+ if (!cmd || cmd->pending) {
+ mutex_unlock(&ddev->cmd_lock);
+ return;
+ }
+
+ mutex_unlock(&ddev->cmd_lock);
+
+ if (cmd->req)
+ print_hex_dump_debug("DIGITAL TX: ", DUMP_PREFIX_NONE, 16, 1,
+ cmd->req->data, cmd->req->len, false);
+
+ switch (cmd->type) {
+ case DIGITAL_CMD_IN_SEND:
+ rc = ddev->ops->in_send_cmd(ddev, cmd->req, cmd->timeout,
+ digital_send_cmd_complete, cmd);
+ break;
+
+ case DIGITAL_CMD_TG_SEND:
+ rc = ddev->ops->tg_send_cmd(ddev, cmd->req, cmd->timeout,
+ digital_send_cmd_complete, cmd);
+ break;
+
+ case DIGITAL_CMD_TG_LISTEN:
+ rc = ddev->ops->tg_listen(ddev, cmd->timeout,
+ digital_send_cmd_complete, cmd);
+ break;
+
+ case DIGITAL_CMD_TG_LISTEN_MDAA:
+ params = cmd->mdaa_params;
+
+ rc = ddev->ops->tg_listen_mdaa(ddev, params, cmd->timeout,
+ digital_send_cmd_complete, cmd);
+ break;
+
+ default:
+ pr_err("Unknown cmd type %d\n", cmd->type);
+ return;
+ }
+
+ if (!rc)
+ return;
+
+ pr_err("in_send_command returned err %d\n", rc);
+
+ mutex_lock(&ddev->cmd_lock);
+ list_del(&cmd->queue);
+ mutex_unlock(&ddev->cmd_lock);
+
+ kfree_skb(cmd->req);
+ kfree(cmd->mdaa_params);
+ kfree(cmd);
+
+ schedule_work(&ddev->cmd_work);
+}
+
+int digital_send_cmd(struct nfc_digital_dev *ddev, u8 cmd_type,
+ struct sk_buff *skb, struct digital_tg_mdaa_params *params,
+ u16 timeout, nfc_digital_cmd_complete_t cmd_cb,
+ void *cb_context)
+{
+ struct digital_cmd *cmd;
+
+ cmd = kzalloc(sizeof(struct digital_cmd), GFP_KERNEL);
+ if (!cmd)
+ return -ENOMEM;
+
+ cmd->type = cmd_type;
+ cmd->timeout = timeout;
+ cmd->req = skb;
+ cmd->mdaa_params = params;
+ cmd->cmd_cb = cmd_cb;
+ cmd->cb_context = cb_context;
+ INIT_LIST_HEAD(&cmd->queue);
+
+ mutex_lock(&ddev->cmd_lock);
+ list_add_tail(&cmd->queue, &ddev->cmd_queue);
+ mutex_unlock(&ddev->cmd_lock);
+
+ schedule_work(&ddev->cmd_work);
+
+ return 0;
+}
+
+int digital_in_configure_hw(struct nfc_digital_dev *ddev, int type, int param)
+{
+ int rc;
+
+ rc = ddev->ops->in_configure_hw(ddev, type, param);
+ if (rc)
+ pr_err("in_configure_hw failed: %d\n", rc);
+
+ return rc;
+}
+
+int digital_tg_configure_hw(struct nfc_digital_dev *ddev, int type, int param)
+{
+ int rc;
+
+ rc = ddev->ops->tg_configure_hw(ddev, type, param);
+ if (rc)
+ pr_err("tg_configure_hw failed: %d\n", rc);
+
+ return rc;
+}
+
+static int digital_tg_listen_mdaa(struct nfc_digital_dev *ddev, u8 rf_tech)
+{
+ struct digital_tg_mdaa_params *params;
+
+ params = kzalloc(sizeof(struct digital_tg_mdaa_params), GFP_KERNEL);
+ if (!params)
+ return -ENOMEM;
+
+ params->sens_res = DIGITAL_SENS_RES_NFC_DEP;
+ get_random_bytes(params->nfcid1, sizeof(params->nfcid1));
+ params->sel_res = DIGITAL_SEL_RES_NFC_DEP;
+
+ params->nfcid2[0] = DIGITAL_SENSF_NFCID2_NFC_DEP_B1;
+ params->nfcid2[1] = DIGITAL_SENSF_NFCID2_NFC_DEP_B2;
+ get_random_bytes(params->nfcid2 + 2, NFC_NFCID2_MAXSIZE - 2);
+ params->sc = DIGITAL_SENSF_FELICA_SC;
+
+ return digital_send_cmd(ddev, DIGITAL_CMD_TG_LISTEN_MDAA, NULL, params,
+ 500, digital_tg_recv_atr_req, NULL);
+}
+
+int digital_target_found(struct nfc_digital_dev *ddev,
+ struct nfc_target *target, u8 protocol)
+{
+ int rc;
+ u8 framing;
+ u8 rf_tech;
+ int (*check_crc)(struct sk_buff *skb);
+ void (*add_crc)(struct sk_buff *skb);
+
+ rf_tech = ddev->poll_techs[ddev->poll_tech_index].rf_tech;
+
+ switch (protocol) {
+ case NFC_PROTO_JEWEL:
+ framing = NFC_DIGITAL_FRAMING_NFCA_T1T;
+ check_crc = digital_skb_check_crc_b;
+ add_crc = digital_skb_add_crc_b;
+ break;
+
+ case NFC_PROTO_MIFARE:
+ framing = NFC_DIGITAL_FRAMING_NFCA_T2T;
+ check_crc = digital_skb_check_crc_a;
+ add_crc = digital_skb_add_crc_a;
+ break;
+
+ case NFC_PROTO_FELICA:
+ framing = NFC_DIGITAL_FRAMING_NFCF_T3T;
+ check_crc = digital_skb_check_crc_f;
+ add_crc = digital_skb_add_crc_f;
+ break;
+
+ case NFC_PROTO_NFC_DEP:
+ if (rf_tech == NFC_DIGITAL_RF_TECH_106A) {
+ framing = NFC_DIGITAL_FRAMING_NFCA_NFC_DEP;
+ check_crc = digital_skb_check_crc_a;
+ add_crc = digital_skb_add_crc_a;
+ } else {
+ framing = NFC_DIGITAL_FRAMING_NFCF_NFC_DEP;
+ check_crc = digital_skb_check_crc_f;
+ add_crc = digital_skb_add_crc_f;
+ }
+ break;
+
+ default:
+ pr_err("Invalid protocol %d\n", protocol);
+ return -EINVAL;
+ }
+
+ pr_debug("rf_tech=%d, protocol=%d\n", rf_tech, protocol);
+
+ ddev->curr_rf_tech = rf_tech;
+ ddev->curr_protocol = protocol;
+
+ if (DIGITAL_DRV_CAPS_IN_CRC(ddev)) {
+ ddev->skb_add_crc = digital_skb_add_crc_none;
+ ddev->skb_check_crc = digital_skb_check_crc_none;
+ } else {
+ ddev->skb_add_crc = add_crc;
+ ddev->skb_check_crc = check_crc;
+ }
+
+ rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, framing);
+ if (rc)
+ return rc;
+
+ target->supported_protocols = (1 << protocol);
+ rc = nfc_targets_found(ddev->nfc_dev, target, 1);
+ if (rc)
+ return rc;
+
+ ddev->poll_tech_count = 0;
+
+ return 0;
+}
+
+void digital_poll_next_tech(struct nfc_digital_dev *ddev)
+{
+ digital_switch_rf(ddev, 0);
+
+ mutex_lock(&ddev->poll_lock);
+
+ if (!ddev->poll_tech_count) {
+ mutex_unlock(&ddev->poll_lock);
+ return;
+ }
+
+ ddev->poll_tech_index = (ddev->poll_tech_index + 1) %
+ ddev->poll_tech_count;
+
+ mutex_unlock(&ddev->poll_lock);
+
+ schedule_work(&ddev->poll_work);
+}
+
+static void digital_wq_poll(struct work_struct *work)
+{
+ int rc;
+ struct digital_poll_tech *poll_tech;
+ struct nfc_digital_dev *ddev = container_of(work,
+ struct nfc_digital_dev,
+ poll_work);
+ mutex_lock(&ddev->poll_lock);
+
+ if (!ddev->poll_tech_count) {
+ mutex_unlock(&ddev->poll_lock);
+ return;
+ }
+
+ poll_tech = &ddev->poll_techs[ddev->poll_tech_index];
+
+ mutex_unlock(&ddev->poll_lock);
+
+ rc = poll_tech->poll_func(ddev, poll_tech->rf_tech);
+ if (rc)
+ digital_poll_next_tech(ddev);
+}
+
+static void digital_add_poll_tech(struct nfc_digital_dev *ddev, u8 rf_tech,
+ digital_poll_t poll_func)
+{
+ struct digital_poll_tech *poll_tech;
+
+ if (ddev->poll_tech_count >= NFC_DIGITAL_POLL_MODE_COUNT_MAX)
+ return;
+
+ poll_tech = &ddev->poll_techs[ddev->poll_tech_count++];
+
+ poll_tech->rf_tech = rf_tech;
+ poll_tech->poll_func = poll_func;
+}
+
+/**
+ * start_poll operation
+ *
+ * For every supported protocol, the corresponding polling function is added
+ * to the table of polling technologies (ddev->poll_techs[]) using
+ * digital_add_poll_tech().
+ * When a polling function fails (by timeout or protocol error) the next one is
+ * schedule by digital_poll_next_tech() on the poll workqueue (ddev->poll_work).
+ */
+static int digital_start_poll(struct nfc_dev *nfc_dev, __u32 im_protocols,
+ __u32 tm_protocols)
+{
+ struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
+ u32 matching_im_protocols, matching_tm_protocols;
+
+ pr_debug("protocols: im 0x%x, tm 0x%x, supported 0x%x\n", im_protocols,
+ tm_protocols, ddev->protocols);
+
+ matching_im_protocols = ddev->protocols & im_protocols;
+ matching_tm_protocols = ddev->protocols & tm_protocols;
+
+ if (!matching_im_protocols && !matching_tm_protocols) {
+ pr_err("Unknown protocol\n");
+ return -EINVAL;
+ }
+
+ if (ddev->poll_tech_count) {
+ pr_err("Already polling\n");
+ return -EBUSY;
+ }
+
+ if (ddev->curr_protocol) {
+ pr_err("A target is already active\n");
+ return -EBUSY;
+ }
+
+ ddev->poll_tech_count = 0;
+ ddev->poll_tech_index = 0;
+
+ if (matching_im_protocols & DIGITAL_PROTO_NFCA_RF_TECH)
+ digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_106A,
+ digital_in_send_sens_req);
+
+ if (im_protocols & DIGITAL_PROTO_NFCF_RF_TECH) {
+ digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_212F,
+ digital_in_send_sensf_req);
+
+ digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_424F,
+ digital_in_send_sensf_req);
+ }
+
+ if (tm_protocols & NFC_PROTO_NFC_DEP_MASK) {
+ if (ddev->ops->tg_listen_mdaa) {
+ digital_add_poll_tech(ddev, 0,
+ digital_tg_listen_mdaa);
+ } else {
+ digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_106A,
+ digital_tg_listen_nfca);
+
+ digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_212F,
+ digital_tg_listen_nfcf);
+
+ digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_424F,
+ digital_tg_listen_nfcf);
+ }
+ }
+
+ if (!ddev->poll_tech_count) {
+ pr_err("Unsupported protocols: im=0x%x, tm=0x%x\n",
+ matching_im_protocols, matching_tm_protocols);
+ return -EINVAL;
+ }
+
+ schedule_work(&ddev->poll_work);
+
+ return 0;
+}
+
+static void digital_stop_poll(struct nfc_dev *nfc_dev)
+{
+ struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
+
+ mutex_lock(&ddev->poll_lock);
+
+ if (!ddev->poll_tech_count) {
+ pr_err("Polling operation was not running\n");
+ mutex_unlock(&ddev->poll_lock);
+ return;
+ }
+
+ ddev->poll_tech_count = 0;
+
+ mutex_unlock(&ddev->poll_lock);
+
+ cancel_work_sync(&ddev->poll_work);
+
+ digital_abort_cmd(ddev);
+}
+
+static int digital_dev_up(struct nfc_dev *nfc_dev)
+{
+ struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
+
+ digital_switch_rf(ddev, 1);
+
+ return 0;
+}
+
+static int digital_dev_down(struct nfc_dev *nfc_dev)
+{
+ struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
+
+ digital_switch_rf(ddev, 0);
+
+ return 0;
+}
+
+static int digital_dep_link_up(struct nfc_dev *nfc_dev,
+ struct nfc_target *target,
+ __u8 comm_mode, __u8 *gb, size_t gb_len)
+{
+ struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
+
+ return digital_in_send_atr_req(ddev, target, comm_mode, gb, gb_len);
+}
+
+static int digital_dep_link_down(struct nfc_dev *nfc_dev)
+{
+ struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
+
+ ddev->curr_protocol = 0;
+
+ return 0;
+}
+
+static int digital_activate_target(struct nfc_dev *nfc_dev,
+ struct nfc_target *target, __u32 protocol)
+{
+ return 0;
+}
+
+static void digital_deactivate_target(struct nfc_dev *nfc_dev,
+ struct nfc_target *target)
+{
+ struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
+
+ ddev->curr_protocol = 0;
+}
+
+static int digital_tg_send(struct nfc_dev *dev, struct sk_buff *skb)
+{
+ struct nfc_digital_dev *ddev = nfc_get_drvdata(dev);
+
+ return digital_tg_send_dep_res(ddev, skb);
+}
+
+static void digital_in_send_complete(struct nfc_digital_dev *ddev, void *arg,
+ struct sk_buff *resp)
+{
+ struct digital_data_exch *data_exch = arg;
+ int rc;
+
+ if (IS_ERR(resp)) {
+ rc = PTR_ERR(resp);
+ goto done;
+ }
+
+ if (ddev->curr_protocol == NFC_PROTO_MIFARE)
+ rc = digital_in_recv_mifare_res(resp);
+ else
+ rc = ddev->skb_check_crc(resp);
+
+ if (rc) {
+ kfree_skb(resp);
+ resp = NULL;
+ }
+
+done:
+ data_exch->cb(data_exch->cb_context, resp, rc);
+
+ kfree(data_exch);
+}
+
+static int digital_in_send(struct nfc_dev *nfc_dev, struct nfc_target *target,
+ struct sk_buff *skb, data_exchange_cb_t cb,
+ void *cb_context)
+{
+ struct nfc_digital_dev *ddev = nfc_get_drvdata(nfc_dev);
+ struct digital_data_exch *data_exch;
+
+ data_exch = kzalloc(sizeof(struct digital_data_exch), GFP_KERNEL);
+ if (!data_exch) {
+ pr_err("Failed to allocate data_exch struct\n");
+ return -ENOMEM;
+ }
+
+ data_exch->cb = cb;
+ data_exch->cb_context = cb_context;
+
+ if (ddev->curr_protocol == NFC_PROTO_NFC_DEP)
+ return digital_in_send_dep_req(ddev, target, skb, data_exch);
+
+ ddev->skb_add_crc(skb);
+
+ return digital_in_send_cmd(ddev, skb, 500, digital_in_send_complete,
+ data_exch);
+}
+
+static struct nfc_ops digital_nfc_ops = {
+ .dev_up = digital_dev_up,
+ .dev_down = digital_dev_down,
+ .start_poll = digital_start_poll,
+ .stop_poll = digital_stop_poll,
+ .dep_link_up = digital_dep_link_up,
+ .dep_link_down = digital_dep_link_down,
+ .activate_target = digital_activate_target,
+ .deactivate_target = digital_deactivate_target,
+ .tm_send = digital_tg_send,
+ .im_transceive = digital_in_send,
+};
+
+struct nfc_digital_dev *nfc_digital_allocate_device(struct nfc_digital_ops *ops,
+ __u32 supported_protocols,
+ __u32 driver_capabilities,
+ int tx_headroom, int tx_tailroom)
+{
+ struct nfc_digital_dev *ddev;
+
+ if (!ops->in_configure_hw || !ops->in_send_cmd || !ops->tg_listen ||
+ !ops->tg_configure_hw || !ops->tg_send_cmd || !ops->abort_cmd ||
+ !ops->switch_rf)
+ return NULL;
+
+ ddev = kzalloc(sizeof(struct nfc_digital_dev), GFP_KERNEL);
+ if (!ddev)
+ return NULL;
+
+ ddev->driver_capabilities = driver_capabilities;
+ ddev->ops = ops;
+
+ mutex_init(&ddev->cmd_lock);
+ INIT_LIST_HEAD(&ddev->cmd_queue);
+
+ INIT_WORK(&ddev->cmd_work, digital_wq_cmd);
+ INIT_WORK(&ddev->cmd_complete_work, digital_wq_cmd_complete);
+
+ mutex_init(&ddev->poll_lock);
+ INIT_WORK(&ddev->poll_work, digital_wq_poll);
+
+ if (supported_protocols & NFC_PROTO_JEWEL_MASK)
+ ddev->protocols |= NFC_PROTO_JEWEL_MASK;
+ if (supported_protocols & NFC_PROTO_MIFARE_MASK)
+ ddev->protocols |= NFC_PROTO_MIFARE_MASK;
+ if (supported_protocols & NFC_PROTO_FELICA_MASK)
+ ddev->protocols |= NFC_PROTO_FELICA_MASK;
+ if (supported_protocols & NFC_PROTO_NFC_DEP_MASK)
+ ddev->protocols |= NFC_PROTO_NFC_DEP_MASK;
+
+ ddev->tx_headroom = tx_headroom + DIGITAL_MAX_HEADER_LEN;
+ ddev->tx_tailroom = tx_tailroom + DIGITAL_CRC_LEN;
+
+ ddev->nfc_dev = nfc_allocate_device(&digital_nfc_ops, ddev->protocols,
+ ddev->tx_headroom,
+ ddev->tx_tailroom);
+ if (!ddev->nfc_dev) {
+ pr_err("nfc_allocate_device failed\n");
+ goto free_dev;
+ }
+
+ nfc_set_drvdata(ddev->nfc_dev, ddev);
+
+ return ddev;
+
+free_dev:
+ kfree(ddev);
+
+ return NULL;
+}
+EXPORT_SYMBOL(nfc_digital_allocate_device);
+
+void nfc_digital_free_device(struct nfc_digital_dev *ddev)
+{
+ nfc_free_device(ddev->nfc_dev);
+ kfree(ddev);
+}
+EXPORT_SYMBOL(nfc_digital_free_device);
+
+int nfc_digital_register_device(struct nfc_digital_dev *ddev)
+{
+ return nfc_register_device(ddev->nfc_dev);
+}
+EXPORT_SYMBOL(nfc_digital_register_device);
+
+void nfc_digital_unregister_device(struct nfc_digital_dev *ddev)
+{
+ struct digital_cmd *cmd, *n;
+
+ nfc_unregister_device(ddev->nfc_dev);
+
+ mutex_lock(&ddev->poll_lock);
+ ddev->poll_tech_count = 0;
+ mutex_unlock(&ddev->poll_lock);
+
+ cancel_work_sync(&ddev->poll_work);
+ cancel_work_sync(&ddev->cmd_work);
+ cancel_work_sync(&ddev->cmd_complete_work);
+
+ list_for_each_entry_safe(cmd, n, &ddev->cmd_queue, queue) {
+ list_del(&cmd->queue);
+ kfree(cmd->mdaa_params);
+ kfree(cmd);
+ }
+}
+EXPORT_SYMBOL(nfc_digital_unregister_device);
+
+MODULE_LICENSE("GPL");
diff --git a/net/nfc/digital_dep.c b/net/nfc/digital_dep.c
new file mode 100644
index 00000000000..07bbc24fb4c
--- /dev/null
+++ b/net/nfc/digital_dep.c
@@ -0,0 +1,729 @@
+/*
+ * NFC Digital Protocol stack
+ * Copyright (c) 2013, Intel Corporation.
+ *
+ * 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 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.
+ *
+ */
+
+#define pr_fmt(fmt) "digital: %s: " fmt, __func__
+
+#include "digital.h"
+
+#define DIGITAL_NFC_DEP_FRAME_DIR_OUT 0xD4
+#define DIGITAL_NFC_DEP_FRAME_DIR_IN 0xD5
+
+#define DIGITAL_NFC_DEP_NFCA_SOD_SB 0xF0
+
+#define DIGITAL_CMD_ATR_REQ 0x00
+#define DIGITAL_CMD_ATR_RES 0x01
+#define DIGITAL_CMD_PSL_REQ 0x04
+#define DIGITAL_CMD_PSL_RES 0x05
+#define DIGITAL_CMD_DEP_REQ 0x06
+#define DIGITAL_CMD_DEP_RES 0x07
+
+#define DIGITAL_ATR_REQ_MIN_SIZE 16
+#define DIGITAL_ATR_REQ_MAX_SIZE 64
+
+#define DIGITAL_NFCID3_LEN ((u8)8)
+#define DIGITAL_LR_BITS_PAYLOAD_SIZE_254B 0x30
+#define DIGITAL_GB_BIT 0x02
+
+#define DIGITAL_NFC_DEP_PFB_TYPE(pfb) ((pfb) & 0xE0)
+
+#define DIGITAL_NFC_DEP_PFB_TIMEOUT_BIT 0x10
+
+#define DIGITAL_NFC_DEP_PFB_IS_TIMEOUT(pfb) \
+ ((pfb) & DIGITAL_NFC_DEP_PFB_TIMEOUT_BIT)
+#define DIGITAL_NFC_DEP_MI_BIT_SET(pfb) ((pfb) & 0x10)
+#define DIGITAL_NFC_DEP_NAD_BIT_SET(pfb) ((pfb) & 0x08)
+#define DIGITAL_NFC_DEP_DID_BIT_SET(pfb) ((pfb) & 0x04)
+#define DIGITAL_NFC_DEP_PFB_PNI(pfb) ((pfb) & 0x03)
+
+#define DIGITAL_NFC_DEP_PFB_I_PDU 0x00
+#define DIGITAL_NFC_DEP_PFB_ACK_NACK_PDU 0x40
+#define DIGITAL_NFC_DEP_PFB_SUPERVISOR_PDU 0x80
+
+struct digital_atr_req {
+ u8 dir;
+ u8 cmd;
+ u8 nfcid3[10];
+ u8 did;
+ u8 bs;
+ u8 br;
+ u8 pp;
+ u8 gb[0];
+} __packed;
+
+struct digital_atr_res {
+ u8 dir;
+ u8 cmd;
+ u8 nfcid3[10];
+ u8 did;
+ u8 bs;
+ u8 br;
+ u8 to;
+ u8 pp;
+ u8 gb[0];
+} __packed;
+
+struct digital_psl_req {
+ u8 dir;
+ u8 cmd;
+ u8 did;
+ u8 brs;
+ u8 fsl;
+} __packed;
+
+struct digital_psl_res {
+ u8 dir;
+ u8 cmd;
+ u8 did;
+} __packed;
+
+struct digital_dep_req_res {
+ u8 dir;
+ u8 cmd;
+ u8 pfb;
+} __packed;
+
+static void digital_in_recv_dep_res(struct nfc_digital_dev *ddev, void *arg,
+ struct sk_buff *resp);
+
+static void digital_skb_push_dep_sod(struct nfc_digital_dev *ddev,
+ struct sk_buff *skb)
+{
+ skb_push(skb, sizeof(u8));
+
+ skb->data[0] = skb->len;
+
+ if (ddev->curr_rf_tech == NFC_DIGITAL_RF_TECH_106A)
+ *skb_push(skb, sizeof(u8)) = DIGITAL_NFC_DEP_NFCA_SOD_SB;
+}
+
+static int digital_skb_pull_dep_sod(struct nfc_digital_dev *ddev,
+ struct sk_buff *skb)
+{
+ u8 size;
+
+ if (skb->len < 2)
+ return -EIO;
+
+ if (ddev->curr_rf_tech == NFC_DIGITAL_RF_TECH_106A)
+ skb_pull(skb, sizeof(u8));
+
+ size = skb->data[0];
+ if (size != skb->len)
+ return -EIO;
+
+ skb_pull(skb, sizeof(u8));
+
+ return 0;
+}
+
+static void digital_in_recv_atr_res(struct nfc_digital_dev *ddev, void *arg,
+ struct sk_buff *resp)
+{
+ struct nfc_target *target = arg;
+ struct digital_atr_res *atr_res;
+ u8 gb_len;
+ int rc;
+
+ if (IS_ERR(resp)) {
+ rc = PTR_ERR(resp);
+ resp = NULL;
+ goto exit;
+ }
+
+ rc = ddev->skb_check_crc(resp);
+ if (rc) {
+ PROTOCOL_ERR("14.4.1.6");
+ goto exit;
+ }
+
+ rc = digital_skb_pull_dep_sod(ddev, resp);
+ if (rc) {
+ PROTOCOL_ERR("14.4.1.2");
+ goto exit;
+ }
+
+ if (resp->len < sizeof(struct digital_atr_res)) {
+ rc = -EIO;
+ goto exit;
+ }
+
+ gb_len = resp->len - sizeof(struct digital_atr_res);
+
+ atr_res = (struct digital_atr_res *)resp->data;
+
+ rc = nfc_set_remote_general_bytes(ddev->nfc_dev, atr_res->gb, gb_len);
+ if (rc)
+ goto exit;
+
+ rc = nfc_dep_link_is_up(ddev->nfc_dev, target->idx, NFC_COMM_ACTIVE,
+ NFC_RF_INITIATOR);
+
+ ddev->curr_nfc_dep_pni = 0;
+
+exit:
+ dev_kfree_skb(resp);
+
+ if (rc)
+ ddev->curr_protocol = 0;
+}
+
+int digital_in_send_atr_req(struct nfc_digital_dev *ddev,
+ struct nfc_target *target, __u8 comm_mode, __u8 *gb,
+ size_t gb_len)
+{
+ struct sk_buff *skb;
+ struct digital_atr_req *atr_req;
+ uint size;
+
+ size = DIGITAL_ATR_REQ_MIN_SIZE + gb_len;
+
+ if (size > DIGITAL_ATR_REQ_MAX_SIZE) {
+ PROTOCOL_ERR("14.6.1.1");
+ return -EINVAL;
+ }
+
+ skb = digital_skb_alloc(ddev, size);
+ if (!skb)
+ return -ENOMEM;
+
+ skb_put(skb, sizeof(struct digital_atr_req));
+
+ atr_req = (struct digital_atr_req *)skb->data;
+ memset(atr_req, 0, sizeof(struct digital_atr_req));
+
+ atr_req->dir = DIGITAL_NFC_DEP_FRAME_DIR_OUT;
+ atr_req->cmd = DIGITAL_CMD_ATR_REQ;
+ if (target->nfcid2_len)
+ memcpy(atr_req->nfcid3, target->nfcid2,
+ max(target->nfcid2_len, DIGITAL_NFCID3_LEN));
+ else
+ get_random_bytes(atr_req->nfcid3, DIGITAL_NFCID3_LEN);
+
+ atr_req->did = 0;
+ atr_req->bs = 0;
+ atr_req->br = 0;
+
+ atr_req->pp = DIGITAL_LR_BITS_PAYLOAD_SIZE_254B;
+
+ if (gb_len) {
+ atr_req->pp |= DIGITAL_GB_BIT;
+ memcpy(skb_put(skb, gb_len), gb, gb_len);
+ }
+
+ digital_skb_push_dep_sod(ddev, skb);
+
+ ddev->skb_add_crc(skb);
+
+ digital_in_send_cmd(ddev, skb, 500, digital_in_recv_atr_res, target);
+
+ return 0;
+}
+
+static int digital_in_send_rtox(struct nfc_digital_dev *ddev,
+ struct digital_data_exch *data_exch, u8 rtox)
+{
+ struct digital_dep_req_res *dep_req;
+ struct sk_buff *skb;
+ int rc;
+
+ skb = digital_skb_alloc(ddev, 1);
+ if (!skb)
+ return -ENOMEM;
+
+ *skb_put(skb, 1) = rtox;
+
+ skb_push(skb, sizeof(struct digital_dep_req_res));
+
+ dep_req = (struct digital_dep_req_res *)skb->data;
+
+ dep_req->dir = DIGITAL_NFC_DEP_FRAME_DIR_OUT;
+ dep_req->cmd = DIGITAL_CMD_DEP_REQ;
+ dep_req->pfb = DIGITAL_NFC_DEP_PFB_SUPERVISOR_PDU |
+ DIGITAL_NFC_DEP_PFB_TIMEOUT_BIT;
+
+ digital_skb_push_dep_sod(ddev, skb);
+
+ ddev->skb_add_crc(skb);
+
+ rc = digital_in_send_cmd(ddev, skb, 1500, digital_in_recv_dep_res,
+ data_exch);
+
+ return rc;
+}
+
+static void digital_in_recv_dep_res(struct nfc_digital_dev *ddev, void *arg,
+ struct sk_buff *resp)
+{
+ struct digital_data_exch *data_exch = arg;
+ struct digital_dep_req_res *dep_res;
+ u8 pfb;
+ uint size;
+ int rc;
+
+ if (IS_ERR(resp)) {
+ rc = PTR_ERR(resp);
+ resp = NULL;
+ goto exit;
+ }
+
+ rc = ddev->skb_check_crc(resp);
+ if (rc) {
+ PROTOCOL_ERR("14.4.1.6");
+ goto error;
+ }
+
+ rc = digital_skb_pull_dep_sod(ddev, resp);
+ if (rc) {
+ PROTOCOL_ERR("14.4.1.2");
+ goto exit;
+ }
+
+ dep_res = (struct digital_dep_req_res *)resp->data;
+
+ if (resp->len < sizeof(struct digital_dep_req_res) ||
+ dep_res->dir != DIGITAL_NFC_DEP_FRAME_DIR_IN ||
+ dep_res->cmd != DIGITAL_CMD_DEP_RES) {
+ rc = -EIO;
+ goto error;
+ }
+
+ pfb = dep_res->pfb;
+
+ switch (DIGITAL_NFC_DEP_PFB_TYPE(pfb)) {
+ case DIGITAL_NFC_DEP_PFB_I_PDU:
+ if (DIGITAL_NFC_DEP_PFB_PNI(pfb) != ddev->curr_nfc_dep_pni) {
+ PROTOCOL_ERR("14.12.3.3");
+ rc = -EIO;
+ goto error;
+ }
+
+ ddev->curr_nfc_dep_pni =
+ DIGITAL_NFC_DEP_PFB_PNI(ddev->curr_nfc_dep_pni + 1);
+ rc = 0;
+ break;
+
+ case DIGITAL_NFC_DEP_PFB_ACK_NACK_PDU:
+ pr_err("Received a ACK/NACK PDU\n");
+ rc = -EIO;
+ goto error;
+
+ case DIGITAL_NFC_DEP_PFB_SUPERVISOR_PDU:
+ if (!DIGITAL_NFC_DEP_PFB_IS_TIMEOUT(pfb)) {
+ rc = -EINVAL;
+ goto error;
+ }
+
+ rc = digital_in_send_rtox(ddev, data_exch, resp->data[3]);
+ if (rc)
+ goto error;
+
+ kfree_skb(resp);
+ return;
+ }
+
+ if (DIGITAL_NFC_DEP_MI_BIT_SET(pfb)) {
+ pr_err("MI bit set. Chained PDU not supported\n");
+ rc = -EIO;
+ goto error;
+ }
+
+ size = sizeof(struct digital_dep_req_res);
+
+ if (DIGITAL_NFC_DEP_DID_BIT_SET(pfb))
+ size++;
+
+ if (size > resp->len) {
+ rc = -EIO;
+ goto error;
+ }
+
+ skb_pull(resp, size);
+
+exit:
+ data_exch->cb(data_exch->cb_context, resp, rc);
+
+error:
+ kfree(data_exch);
+
+ if (rc)
+ kfree_skb(resp);
+}
+
+int digital_in_send_dep_req(struct nfc_digital_dev *ddev,
+ struct nfc_target *target, struct sk_buff *skb,
+ struct digital_data_exch *data_exch)
+{
+ struct digital_dep_req_res *dep_req;
+
+ skb_push(skb, sizeof(struct digital_dep_req_res));
+
+ dep_req = (struct digital_dep_req_res *)skb->data;
+ dep_req->dir = DIGITAL_NFC_DEP_FRAME_DIR_OUT;
+ dep_req->cmd = DIGITAL_CMD_DEP_REQ;
+ dep_req->pfb = ddev->curr_nfc_dep_pni;
+
+ digital_skb_push_dep_sod(ddev, skb);
+
+ ddev->skb_add_crc(skb);
+
+ return digital_in_send_cmd(ddev, skb, 1500, digital_in_recv_dep_res,
+ data_exch);
+}
+
+static void digital_tg_recv_dep_req(struct nfc_digital_dev *ddev, void *arg,
+ struct sk_buff *resp)
+{
+ int rc;
+ struct digital_dep_req_res *dep_req;
+ size_t size;
+
+ if (IS_ERR(resp)) {
+ rc = PTR_ERR(resp);
+ resp = NULL;
+ goto exit;
+ }
+
+ rc = ddev->skb_check_crc(resp);
+ if (rc) {
+ PROTOCOL_ERR("14.4.1.6");
+ goto exit;
+ }
+
+ rc = digital_skb_pull_dep_sod(ddev, resp);
+ if (rc) {
+ PROTOCOL_ERR("14.4.1.2");
+ goto exit;
+ }
+
+ size = sizeof(struct digital_dep_req_res);
+ dep_req = (struct digital_dep_req_res *)resp->data;
+
+ if (resp->len < size || dep_req->dir != DIGITAL_NFC_DEP_FRAME_DIR_OUT ||
+ dep_req->cmd != DIGITAL_CMD_DEP_REQ) {
+ rc = -EIO;
+ goto exit;
+ }
+
+ if (DIGITAL_NFC_DEP_DID_BIT_SET(dep_req->pfb))
+ size++;
+
+ if (resp->len < size) {
+ rc = -EIO;
+ goto exit;
+ }
+
+ switch (DIGITAL_NFC_DEP_PFB_TYPE(dep_req->pfb)) {
+ case DIGITAL_NFC_DEP_PFB_I_PDU:
+ pr_debug("DIGITAL_NFC_DEP_PFB_I_PDU\n");
+ ddev->curr_nfc_dep_pni = DIGITAL_NFC_DEP_PFB_PNI(dep_req->pfb);
+ break;
+ case DIGITAL_NFC_DEP_PFB_ACK_NACK_PDU:
+ pr_err("Received a ACK/NACK PDU\n");
+ rc = -EINVAL;
+ goto exit;
+ break;
+ case DIGITAL_NFC_DEP_PFB_SUPERVISOR_PDU:
+ pr_err("Received a SUPERVISOR PDU\n");
+ rc = -EINVAL;
+ goto exit;
+ break;
+ }
+
+ skb_pull(resp, size);
+
+ rc = nfc_tm_data_received(ddev->nfc_dev, resp);
+
+exit:
+ if (rc)
+ kfree_skb(resp);
+}
+
+int digital_tg_send_dep_res(struct nfc_digital_dev *ddev, struct sk_buff *skb)
+{
+ struct digital_dep_req_res *dep_res;
+
+ skb_push(skb, sizeof(struct digital_dep_req_res));
+ dep_res = (struct digital_dep_req_res *)skb->data;
+
+ dep_res->dir = DIGITAL_NFC_DEP_FRAME_DIR_IN;
+ dep_res->cmd = DIGITAL_CMD_DEP_RES;
+ dep_res->pfb = ddev->curr_nfc_dep_pni;
+
+ digital_skb_push_dep_sod(ddev, skb);
+
+ ddev->skb_add_crc(skb);
+
+ return digital_tg_send_cmd(ddev, skb, 1500, digital_tg_recv_dep_req,
+ NULL);
+}
+
+static void digital_tg_send_psl_res_complete(struct nfc_digital_dev *ddev,
+ void *arg, struct sk_buff *resp)
+{
+ u8 rf_tech = PTR_ERR(arg);
+
+ if (IS_ERR(resp))
+ return;
+
+ digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech);
+
+ digital_tg_listen(ddev, 1500, digital_tg_recv_dep_req, NULL);
+
+ dev_kfree_skb(resp);
+}
+
+static int digital_tg_send_psl_res(struct nfc_digital_dev *ddev, u8 did,
+ u8 rf_tech)
+{
+ struct digital_psl_res *psl_res;
+ struct sk_buff *skb;
+ int rc;
+
+ skb = digital_skb_alloc(ddev, sizeof(struct digital_psl_res));
+ if (!skb)
+ return -ENOMEM;
+
+ skb_put(skb, sizeof(struct digital_psl_res));
+
+ psl_res = (struct digital_psl_res *)skb->data;
+
+ psl_res->dir = DIGITAL_NFC_DEP_FRAME_DIR_IN;
+ psl_res->cmd = DIGITAL_CMD_PSL_RES;
+ psl_res->did = did;
+
+ digital_skb_push_dep_sod(ddev, skb);
+
+ ddev->skb_add_crc(skb);
+
+ rc = digital_tg_send_cmd(ddev, skb, 0, digital_tg_send_psl_res_complete,
+ ERR_PTR(rf_tech));
+
+ if (rc)
+ kfree_skb(skb);
+
+ return rc;
+}
+
+static void digital_tg_recv_psl_req(struct nfc_digital_dev *ddev, void *arg,
+ struct sk_buff *resp)
+{
+ int rc;
+ struct digital_psl_req *psl_req;
+ u8 rf_tech;
+ u8 dsi;
+
+ if (IS_ERR(resp)) {
+ rc = PTR_ERR(resp);
+ resp = NULL;
+ goto exit;
+ }
+
+ rc = ddev->skb_check_crc(resp);
+ if (rc) {
+ PROTOCOL_ERR("14.4.1.6");
+ goto exit;
+ }
+
+ rc = digital_skb_pull_dep_sod(ddev, resp);
+ if (rc) {
+ PROTOCOL_ERR("14.4.1.2");
+ goto exit;
+ }
+
+ psl_req = (struct digital_psl_req *)resp->data;
+
+ if (resp->len != sizeof(struct digital_psl_req) ||
+ psl_req->dir != DIGITAL_NFC_DEP_FRAME_DIR_OUT ||
+ psl_req->cmd != DIGITAL_CMD_PSL_REQ) {
+ rc = -EIO;
+ goto exit;
+ }
+
+ dsi = (psl_req->brs >> 3) & 0x07;
+ switch (dsi) {
+ case 0:
+ rf_tech = NFC_DIGITAL_RF_TECH_106A;
+ break;
+ case 1:
+ rf_tech = NFC_DIGITAL_RF_TECH_212F;
+ break;
+ case 2:
+ rf_tech = NFC_DIGITAL_RF_TECH_424F;
+ break;
+ default:
+ pr_err("Unsuported dsi value %d\n", dsi);
+ goto exit;
+ }
+
+ rc = digital_tg_send_psl_res(ddev, psl_req->did, rf_tech);
+
+exit:
+ kfree_skb(resp);
+}
+
+static void digital_tg_send_atr_res_complete(struct nfc_digital_dev *ddev,
+ void *arg, struct sk_buff *resp)
+{
+ int offset;
+
+ if (IS_ERR(resp)) {
+ digital_poll_next_tech(ddev);
+ return;
+ }
+
+ offset = 2;
+ if (resp->data[0] == DIGITAL_NFC_DEP_NFCA_SOD_SB)
+ offset++;
+
+ if (resp->data[offset] == DIGITAL_CMD_PSL_REQ)
+ digital_tg_recv_psl_req(ddev, arg, resp);
+ else
+ digital_tg_recv_dep_req(ddev, arg, resp);
+}
+
+static int digital_tg_send_atr_res(struct nfc_digital_dev *ddev,
+ struct digital_atr_req *atr_req)
+{
+ struct digital_atr_res *atr_res;
+ struct sk_buff *skb;
+ u8 *gb;
+ size_t gb_len;
+ int rc;
+
+ gb = nfc_get_local_general_bytes(ddev->nfc_dev, &gb_len);
+ if (!gb)
+ gb_len = 0;
+
+ skb = digital_skb_alloc(ddev, sizeof(struct digital_atr_res) + gb_len);
+ if (!skb)
+ return -ENOMEM;
+
+ skb_put(skb, sizeof(struct digital_atr_res));
+ atr_res = (struct digital_atr_res *)skb->data;
+
+ memset(atr_res, 0, sizeof(struct digital_atr_res));
+
+ atr_res->dir = DIGITAL_NFC_DEP_FRAME_DIR_IN;
+ atr_res->cmd = DIGITAL_CMD_ATR_RES;
+ memcpy(atr_res->nfcid3, atr_req->nfcid3, sizeof(atr_req->nfcid3));
+ atr_res->to = 8;
+ atr_res->pp = DIGITAL_LR_BITS_PAYLOAD_SIZE_254B;
+ if (gb_len) {
+ skb_put(skb, gb_len);
+
+ atr_res->pp |= DIGITAL_GB_BIT;
+ memcpy(atr_res->gb, gb, gb_len);
+ }
+
+ digital_skb_push_dep_sod(ddev, skb);
+
+ ddev->skb_add_crc(skb);
+
+ rc = digital_tg_send_cmd(ddev, skb, 999,
+ digital_tg_send_atr_res_complete, NULL);
+ if (rc) {
+ kfree_skb(skb);
+ return rc;
+ }
+
+ return rc;
+}
+
+void digital_tg_recv_atr_req(struct nfc_digital_dev *ddev, void *arg,
+ struct sk_buff *resp)
+{
+ int rc;
+ struct digital_atr_req *atr_req;
+ size_t gb_len, min_size;
+
+ if (IS_ERR(resp)) {
+ rc = PTR_ERR(resp);
+ resp = NULL;
+ goto exit;
+ }
+
+ if (!resp->len) {
+ rc = -EIO;
+ goto exit;
+ }
+
+ if (resp->data[0] == DIGITAL_NFC_DEP_NFCA_SOD_SB) {
+ min_size = DIGITAL_ATR_REQ_MIN_SIZE + 2;
+
+ ddev->curr_rf_tech = NFC_DIGITAL_RF_TECH_106A;
+ ddev->skb_add_crc = digital_skb_add_crc_a;
+ ddev->skb_check_crc = digital_skb_check_crc_a;
+ } else {
+ min_size = DIGITAL_ATR_REQ_MIN_SIZE + 1;
+
+ ddev->curr_rf_tech = NFC_DIGITAL_RF_TECH_212F;
+ ddev->skb_add_crc = digital_skb_add_crc_f;
+ ddev->skb_check_crc = digital_skb_check_crc_f;
+ }
+
+ if (resp->len < min_size) {
+ rc = -EIO;
+ goto exit;
+ }
+
+ if (DIGITAL_DRV_CAPS_TG_CRC(ddev)) {
+ ddev->skb_add_crc = digital_skb_add_crc_none;
+ ddev->skb_check_crc = digital_skb_check_crc_none;
+ }
+
+ rc = ddev->skb_check_crc(resp);
+ if (rc) {
+ PROTOCOL_ERR("14.4.1.6");
+ goto exit;
+ }
+
+ rc = digital_skb_pull_dep_sod(ddev, resp);
+ if (rc) {
+ PROTOCOL_ERR("14.4.1.2");
+ goto exit;
+ }
+
+ atr_req = (struct digital_atr_req *)resp->data;
+
+ if (atr_req->dir != DIGITAL_NFC_DEP_FRAME_DIR_OUT ||
+ atr_req->cmd != DIGITAL_CMD_ATR_REQ) {
+ rc = -EINVAL;
+ goto exit;
+ }
+
+ rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
+ NFC_DIGITAL_FRAMING_NFC_DEP_ACTIVATED);
+ if (rc)
+ goto exit;
+
+ rc = digital_tg_send_atr_res(ddev, atr_req);
+ if (rc)
+ goto exit;
+
+ gb_len = resp->len - sizeof(struct digital_atr_req);
+ rc = nfc_tm_activated(ddev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
+ NFC_COMM_PASSIVE, atr_req->gb, gb_len);
+ if (rc)
+ goto exit;
+
+ ddev->poll_tech_count = 0;
+
+ rc = 0;
+exit:
+ if (rc)
+ digital_poll_next_tech(ddev);
+
+ dev_kfree_skb(resp);
+}
diff --git a/net/nfc/digital_technology.c b/net/nfc/digital_technology.c
new file mode 100644
index 00000000000..251c8c753eb
--- /dev/null
+++ b/net/nfc/digital_technology.c
@@ -0,0 +1,770 @@
+/*
+ * NFC Digital Protocol stack
+ * Copyright (c) 2013, Intel Corporation.
+ *
+ * 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 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.
+ *
+ */
+
+#define pr_fmt(fmt) "digital: %s: " fmt, __func__
+
+#include "digital.h"
+
+#define DIGITAL_CMD_SENS_REQ 0x26
+#define DIGITAL_CMD_ALL_REQ 0x52
+#define DIGITAL_CMD_SEL_REQ_CL1 0x93
+#define DIGITAL_CMD_SEL_REQ_CL2 0x95
+#define DIGITAL_CMD_SEL_REQ_CL3 0x97
+
+#define DIGITAL_SDD_REQ_SEL_PAR 0x20
+
+#define DIGITAL_SDD_RES_CT 0x88
+#define DIGITAL_SDD_RES_LEN 5
+
+#define DIGITAL_SEL_RES_NFCID1_COMPLETE(sel_res) (!((sel_res) & 0x04))
+#define DIGITAL_SEL_RES_IS_T2T(sel_res) (!((sel_res) & 0x60))
+#define DIGITAL_SEL_RES_IS_NFC_DEP(sel_res) ((sel_res) & 0x40)
+
+#define DIGITAL_SENS_RES_IS_T1T(sens_res) (((sens_res) & 0x0C00) == 0x0C00)
+#define DIGITAL_SENS_RES_IS_VALID(sens_res) \
+ ((!((sens_res) & 0x001F) && (((sens_res) & 0x0C00) == 0x0C00)) || \
+ (((sens_res) & 0x001F) && ((sens_res) & 0x0C00) != 0x0C00))
+
+#define DIGITAL_MIFARE_READ_RES_LEN 16
+#define DIGITAL_MIFARE_ACK_RES 0x0A
+
+#define DIGITAL_CMD_SENSF_REQ 0x00
+#define DIGITAL_CMD_SENSF_RES 0x01
+
+#define DIGITAL_SENSF_RES_MIN_LENGTH 17
+#define DIGITAL_SENSF_RES_RD_AP_B1 0x00
+#define DIGITAL_SENSF_RES_RD_AP_B2 0x8F
+
+#define DIGITAL_SENSF_REQ_RC_NONE 0
+#define DIGITAL_SENSF_REQ_RC_SC 1
+#define DIGITAL_SENSF_REQ_RC_AP 2
+
+struct digital_sdd_res {
+ u8 nfcid1[4];
+ u8 bcc;
+} __packed;
+
+struct digital_sel_req {
+ u8 sel_cmd;
+ u8 b2;
+ u8 nfcid1[4];
+ u8 bcc;
+} __packed;
+
+struct digital_sensf_req {
+ u8 cmd;
+ u8 sc1;
+ u8 sc2;
+ u8 rc;
+ u8 tsn;
+} __packed;
+
+struct digital_sensf_res {
+ u8 cmd;
+ u8 nfcid2[8];
+ u8 pad0[2];
+ u8 pad1[3];
+ u8 mrti_check;
+ u8 mrti_update;
+ u8 pad2;
+ u8 rd[2];
+} __packed;
+
+static int digital_in_send_sdd_req(struct nfc_digital_dev *ddev,
+ struct nfc_target *target);
+
+static void digital_in_recv_sel_res(struct nfc_digital_dev *ddev, void *arg,
+ struct sk_buff *resp)
+{
+ struct nfc_target *target = arg;
+ int rc;
+ u8 sel_res;
+ u8 nfc_proto;
+
+ if (IS_ERR(resp)) {
+ rc = PTR_ERR(resp);
+ resp = NULL;
+ goto exit;
+ }
+
+ if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) {
+ rc = digital_skb_check_crc_a(resp);
+ if (rc) {
+ PROTOCOL_ERR("4.4.1.3");
+ goto exit;
+ }
+ }
+
+ if (!resp->len) {
+ rc = -EIO;
+ goto exit;
+ }
+
+ sel_res = resp->data[0];
+
+ if (!DIGITAL_SEL_RES_NFCID1_COMPLETE(sel_res)) {
+ rc = digital_in_send_sdd_req(ddev, target);
+ if (rc)
+ goto exit;
+
+ goto exit_free_skb;
+ }
+
+ if (DIGITAL_SEL_RES_IS_T2T(sel_res)) {
+ nfc_proto = NFC_PROTO_MIFARE;
+ } else if (DIGITAL_SEL_RES_IS_NFC_DEP(sel_res)) {
+ nfc_proto = NFC_PROTO_NFC_DEP;
+ } else {
+ rc = -EOPNOTSUPP;
+ goto exit;
+ }
+
+ target->sel_res = sel_res;
+
+ rc = digital_target_found(ddev, target, nfc_proto);
+
+exit:
+ kfree(target);
+
+exit_free_skb:
+ dev_kfree_skb(resp);
+
+ if (rc)
+ digital_poll_next_tech(ddev);
+}
+
+static int digital_in_send_sel_req(struct nfc_digital_dev *ddev,
+ struct nfc_target *target,
+ struct digital_sdd_res *sdd_res)
+{
+ struct sk_buff *skb;
+ struct digital_sel_req *sel_req;
+ u8 sel_cmd;
+ int rc;
+
+ skb = digital_skb_alloc(ddev, sizeof(struct digital_sel_req));
+ if (!skb)
+ return -ENOMEM;
+
+ skb_put(skb, sizeof(struct digital_sel_req));
+ sel_req = (struct digital_sel_req *)skb->data;
+
+ if (target->nfcid1_len <= 4)
+ sel_cmd = DIGITAL_CMD_SEL_REQ_CL1;
+ else if (target->nfcid1_len < 10)
+ sel_cmd = DIGITAL_CMD_SEL_REQ_CL2;
+ else
+ sel_cmd = DIGITAL_CMD_SEL_REQ_CL3;
+
+ sel_req->sel_cmd = sel_cmd;
+ sel_req->b2 = 0x70;
+ memcpy(sel_req->nfcid1, sdd_res->nfcid1, 4);
+ sel_req->bcc = sdd_res->bcc;
+
+ if (DIGITAL_DRV_CAPS_IN_CRC(ddev)) {
+ rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
+ NFC_DIGITAL_FRAMING_NFCA_STANDARD_WITH_CRC_A);
+ if (rc)
+ goto exit;
+ } else {
+ digital_skb_add_crc_a(skb);
+ }
+
+ rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sel_res,
+ target);
+exit:
+ if (rc)
+ kfree_skb(skb);
+
+ return rc;
+}
+
+static void digital_in_recv_sdd_res(struct nfc_digital_dev *ddev, void *arg,
+ struct sk_buff *resp)
+{
+ struct nfc_target *target = arg;
+ struct digital_sdd_res *sdd_res;
+ int rc;
+ u8 offset, size;
+ u8 i, bcc;
+
+ if (IS_ERR(resp)) {
+ rc = PTR_ERR(resp);
+ resp = NULL;
+ goto exit;
+ }
+
+ if (resp->len < DIGITAL_SDD_RES_LEN) {
+ PROTOCOL_ERR("4.7.2.8");
+ rc = -EINVAL;
+ goto exit;
+ }
+
+ sdd_res = (struct digital_sdd_res *)resp->data;
+
+ for (i = 0, bcc = 0; i < 4; i++)
+ bcc ^= sdd_res->nfcid1[i];
+
+ if (bcc != sdd_res->bcc) {
+ PROTOCOL_ERR("4.7.2.6");
+ rc = -EINVAL;
+ goto exit;
+ }
+
+ if (sdd_res->nfcid1[0] == DIGITAL_SDD_RES_CT) {
+ offset = 1;
+ size = 3;
+ } else {
+ offset = 0;
+ size = 4;
+ }
+
+ memcpy(target->nfcid1 + target->nfcid1_len, sdd_res->nfcid1 + offset,
+ size);
+ target->nfcid1_len += size;
+
+ rc = digital_in_send_sel_req(ddev, target, sdd_res);
+
+exit:
+ dev_kfree_skb(resp);
+
+ if (rc) {
+ kfree(target);
+ digital_poll_next_tech(ddev);
+ }
+}
+
+static int digital_in_send_sdd_req(struct nfc_digital_dev *ddev,
+ struct nfc_target *target)
+{
+ int rc;
+ struct sk_buff *skb;
+ u8 sel_cmd;
+
+ rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
+ NFC_DIGITAL_FRAMING_NFCA_STANDARD);
+ if (rc)
+ return rc;
+
+ skb = digital_skb_alloc(ddev, 2);
+ if (!skb)
+ return -ENOMEM;
+
+ if (target->nfcid1_len == 0)
+ sel_cmd = DIGITAL_CMD_SEL_REQ_CL1;
+ else if (target->nfcid1_len == 3)
+ sel_cmd = DIGITAL_CMD_SEL_REQ_CL2;
+ else
+ sel_cmd = DIGITAL_CMD_SEL_REQ_CL3;
+
+ *skb_put(skb, sizeof(u8)) = sel_cmd;
+ *skb_put(skb, sizeof(u8)) = DIGITAL_SDD_REQ_SEL_PAR;
+
+ return digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sdd_res,
+ target);
+}
+
+static void digital_in_recv_sens_res(struct nfc_digital_dev *ddev, void *arg,
+ struct sk_buff *resp)
+{
+ struct nfc_target *target = NULL;
+ int rc;
+
+ if (IS_ERR(resp)) {
+ rc = PTR_ERR(resp);
+ resp = NULL;
+ goto exit;
+ }
+
+ if (resp->len < sizeof(u16)) {
+ rc = -EIO;
+ goto exit;
+ }
+
+ target = kzalloc(sizeof(struct nfc_target), GFP_KERNEL);
+ if (!target) {
+ rc = -ENOMEM;
+ goto exit;
+ }
+
+ target->sens_res = __le16_to_cpu(*(__le16 *)resp->data);
+
+ if (!DIGITAL_SENS_RES_IS_VALID(target->sens_res)) {
+ PROTOCOL_ERR("4.6.3.3");
+ rc = -EINVAL;
+ goto exit;
+ }
+
+ if (DIGITAL_SENS_RES_IS_T1T(target->sens_res))
+ rc = digital_target_found(ddev, target, NFC_PROTO_JEWEL);
+ else
+ rc = digital_in_send_sdd_req(ddev, target);
+
+exit:
+ dev_kfree_skb(resp);
+
+ if (rc) {
+ kfree(target);
+ digital_poll_next_tech(ddev);
+ }
+}
+
+int digital_in_send_sens_req(struct nfc_digital_dev *ddev, u8 rf_tech)
+{
+ struct sk_buff *skb;
+ int rc;
+
+ rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
+ NFC_DIGITAL_RF_TECH_106A);
+ if (rc)
+ return rc;
+
+ rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
+ NFC_DIGITAL_FRAMING_NFCA_SHORT);
+ if (rc)
+ return rc;
+
+ skb = digital_skb_alloc(ddev, 1);
+ if (!skb)
+ return -ENOMEM;
+
+ *skb_put(skb, sizeof(u8)) = DIGITAL_CMD_SENS_REQ;
+
+ rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sens_res, NULL);
+ if (rc)
+ kfree_skb(skb);
+
+ return rc;
+}
+
+int digital_in_recv_mifare_res(struct sk_buff *resp)
+{
+ /* Successful READ command response is 16 data bytes + 2 CRC bytes long.
+ * Since the driver can't differentiate a ACK/NACK response from a valid
+ * READ response, the CRC calculation must be handled at digital level
+ * even if the driver supports it for this technology.
+ */
+ if (resp->len == DIGITAL_MIFARE_READ_RES_LEN + DIGITAL_CRC_LEN) {
+ if (digital_skb_check_crc_a(resp)) {
+ PROTOCOL_ERR("9.4.1.2");
+ return -EIO;
+ }
+
+ return 0;
+ }
+
+ /* ACK response (i.e. successful WRITE). */
+ if (resp->len == 1 && resp->data[0] == DIGITAL_MIFARE_ACK_RES) {
+ resp->data[0] = 0;
+ return 0;
+ }
+
+ /* NACK and any other responses are treated as error. */
+ return -EIO;
+}
+
+static void digital_in_recv_sensf_res(struct nfc_digital_dev *ddev, void *arg,
+ struct sk_buff *resp)
+{
+ int rc;
+ u8 proto;
+ struct nfc_target target;
+ struct digital_sensf_res *sensf_res;
+
+ if (IS_ERR(resp)) {
+ rc = PTR_ERR(resp);
+ resp = NULL;
+ goto exit;
+ }
+
+ if (resp->len < DIGITAL_SENSF_RES_MIN_LENGTH) {
+ rc = -EIO;
+ goto exit;
+ }
+
+ if (!DIGITAL_DRV_CAPS_IN_CRC(ddev)) {
+ rc = digital_skb_check_crc_f(resp);
+ if (rc) {
+ PROTOCOL_ERR("6.4.1.8");
+ goto exit;
+ }
+ }
+
+ skb_pull(resp, 1);
+
+ memset(&target, 0, sizeof(struct nfc_target));
+
+ sensf_res = (struct digital_sensf_res *)resp->data;
+
+ memcpy(target.sensf_res, sensf_res, resp->len);
+ target.sensf_res_len = resp->len;
+
+ memcpy(target.nfcid2, sensf_res->nfcid2, NFC_NFCID2_MAXSIZE);
+ target.nfcid2_len = NFC_NFCID2_MAXSIZE;
+
+ if (target.nfcid2[0] == DIGITAL_SENSF_NFCID2_NFC_DEP_B1 &&
+ target.nfcid2[1] == DIGITAL_SENSF_NFCID2_NFC_DEP_B2)
+ proto = NFC_PROTO_NFC_DEP;
+ else
+ proto = NFC_PROTO_FELICA;
+
+ rc = digital_target_found(ddev, &target, proto);
+
+exit:
+ dev_kfree_skb(resp);
+
+ if (rc)
+ digital_poll_next_tech(ddev);
+}
+
+int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech)
+{
+ struct digital_sensf_req *sensf_req;
+ struct sk_buff *skb;
+ int rc;
+ u8 size;
+
+ rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech);
+ if (rc)
+ return rc;
+
+ rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
+ NFC_DIGITAL_FRAMING_NFCF);
+ if (rc)
+ return rc;
+
+ size = sizeof(struct digital_sensf_req);
+
+ skb = digital_skb_alloc(ddev, size);
+ if (!skb)
+ return -ENOMEM;
+
+ skb_put(skb, size);
+
+ sensf_req = (struct digital_sensf_req *)skb->data;
+ sensf_req->cmd = DIGITAL_CMD_SENSF_REQ;
+ sensf_req->sc1 = 0xFF;
+ sensf_req->sc2 = 0xFF;
+ sensf_req->rc = 0;
+ sensf_req->tsn = 0;
+
+ *skb_push(skb, 1) = size + 1;
+
+ if (!DIGITAL_DRV_CAPS_IN_CRC(ddev))
+ digital_skb_add_crc_f(skb);
+
+ rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sensf_res,
+ NULL);
+ if (rc)
+ kfree_skb(skb);
+
+ return rc;
+}
+
+static int digital_tg_send_sel_res(struct nfc_digital_dev *ddev)
+{
+ struct sk_buff *skb;
+ int rc;
+
+ skb = digital_skb_alloc(ddev, 1);
+ if (!skb)
+ return -ENOMEM;
+
+ *skb_put(skb, 1) = DIGITAL_SEL_RES_NFC_DEP;
+
+ if (!DIGITAL_DRV_CAPS_TG_CRC(ddev))
+ digital_skb_add_crc_a(skb);
+
+ rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_atr_req,
+ NULL);
+ if (rc)
+ kfree_skb(skb);
+
+ return rc;
+}
+
+static void digital_tg_recv_sel_req(struct nfc_digital_dev *ddev, void *arg,
+ struct sk_buff *resp)
+{
+ int rc;
+
+ if (IS_ERR(resp)) {
+ rc = PTR_ERR(resp);
+ resp = NULL;
+ goto exit;
+ }
+
+ if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) {
+ rc = digital_skb_check_crc_a(resp);
+ if (rc) {
+ PROTOCOL_ERR("4.4.1.3");
+ goto exit;
+ }
+ }
+
+ /* Silently ignore SEL_REQ content and send a SEL_RES for NFC-DEP */
+
+ rc = digital_tg_send_sel_res(ddev);
+
+exit:
+ if (rc)
+ digital_poll_next_tech(ddev);
+
+ dev_kfree_skb(resp);
+}
+
+static int digital_tg_send_sdd_res(struct nfc_digital_dev *ddev)
+{
+ struct sk_buff *skb;
+ struct digital_sdd_res *sdd_res;
+ int rc, i;
+
+ skb = digital_skb_alloc(ddev, sizeof(struct digital_sdd_res));
+ if (!skb)
+ return -ENOMEM;
+
+ skb_put(skb, sizeof(struct digital_sdd_res));
+ sdd_res = (struct digital_sdd_res *)skb->data;
+
+ sdd_res->nfcid1[0] = 0x08;
+ get_random_bytes(sdd_res->nfcid1 + 1, 3);
+
+ sdd_res->bcc = 0;
+ for (i = 0; i < 4; i++)
+ sdd_res->bcc ^= sdd_res->nfcid1[i];
+
+ rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_sel_req,
+ NULL);
+ if (rc)
+ kfree_skb(skb);
+
+ return rc;
+}
+
+static void digital_tg_recv_sdd_req(struct nfc_digital_dev *ddev, void *arg,
+ struct sk_buff *resp)
+{
+ u8 *sdd_req;
+ int rc;
+
+ if (IS_ERR(resp)) {
+ rc = PTR_ERR(resp);
+ resp = NULL;
+ goto exit;
+ }
+
+ sdd_req = resp->data;
+
+ if (resp->len < 2 || sdd_req[0] != DIGITAL_CMD_SEL_REQ_CL1 ||
+ sdd_req[1] != DIGITAL_SDD_REQ_SEL_PAR) {
+ rc = -EINVAL;
+ goto exit;
+ }
+
+ rc = digital_tg_send_sdd_res(ddev);
+
+exit:
+ if (rc)
+ digital_poll_next_tech(ddev);
+
+ dev_kfree_skb(resp);
+}
+
+static int digital_tg_send_sens_res(struct nfc_digital_dev *ddev)
+{
+ struct sk_buff *skb;
+ u8 *sens_res;
+ int rc;
+
+ skb = digital_skb_alloc(ddev, 2);
+ if (!skb)
+ return -ENOMEM;
+
+ sens_res = skb_put(skb, 2);
+
+ sens_res[0] = (DIGITAL_SENS_RES_NFC_DEP >> 8) & 0xFF;
+ sens_res[1] = DIGITAL_SENS_RES_NFC_DEP & 0xFF;
+
+ rc = digital_tg_send_cmd(ddev, skb, 300, digital_tg_recv_sdd_req,
+ NULL);
+ if (rc)
+ kfree_skb(skb);
+
+ return rc;
+}
+
+void digital_tg_recv_sens_req(struct nfc_digital_dev *ddev, void *arg,
+ struct sk_buff *resp)
+{
+ u8 sens_req;
+ int rc;
+
+ if (IS_ERR(resp)) {
+ rc = PTR_ERR(resp);
+ resp = NULL;
+ goto exit;
+ }
+
+ sens_req = resp->data[0];
+
+ if (!resp->len || (sens_req != DIGITAL_CMD_SENS_REQ &&
+ sens_req != DIGITAL_CMD_ALL_REQ)) {
+ rc = -EINVAL;
+ goto exit;
+ }
+
+ rc = digital_tg_send_sens_res(ddev);
+
+exit:
+ if (rc)
+ digital_poll_next_tech(ddev);
+
+ dev_kfree_skb(resp);
+}
+
+static int digital_tg_send_sensf_res(struct nfc_digital_dev *ddev,
+ struct digital_sensf_req *sensf_req)
+{
+ struct sk_buff *skb;
+ u8 size;
+ int rc;
+ struct digital_sensf_res *sensf_res;
+
+ size = sizeof(struct digital_sensf_res);
+
+ if (sensf_req->rc != DIGITAL_SENSF_REQ_RC_NONE)
+ size -= sizeof(sensf_res->rd);
+
+ skb = digital_skb_alloc(ddev, size);
+ if (!skb)
+ return -ENOMEM;
+
+ skb_put(skb, size);
+
+ sensf_res = (struct digital_sensf_res *)skb->data;
+
+ memset(sensf_res, 0, size);
+
+ sensf_res->cmd = DIGITAL_CMD_SENSF_RES;
+ sensf_res->nfcid2[0] = DIGITAL_SENSF_NFCID2_NFC_DEP_B1;
+ sensf_res->nfcid2[1] = DIGITAL_SENSF_NFCID2_NFC_DEP_B2;
+ get_random_bytes(&sensf_res->nfcid2[2], 6);
+
+ switch (sensf_req->rc) {
+ case DIGITAL_SENSF_REQ_RC_SC:
+ sensf_res->rd[0] = sensf_req->sc1;
+ sensf_res->rd[1] = sensf_req->sc2;
+ break;
+ case DIGITAL_SENSF_REQ_RC_AP:
+ sensf_res->rd[0] = DIGITAL_SENSF_RES_RD_AP_B1;
+ sensf_res->rd[1] = DIGITAL_SENSF_RES_RD_AP_B2;
+ break;
+ }
+
+ *skb_push(skb, sizeof(u8)) = size + 1;
+
+ if (!DIGITAL_DRV_CAPS_TG_CRC(ddev))
+ digital_skb_add_crc_f(skb);
+
+ rc = digital_tg_send_cmd(ddev, skb, 300,
+ digital_tg_recv_atr_req, NULL);
+ if (rc)
+ kfree_skb(skb);
+
+ return rc;
+}
+
+void digital_tg_recv_sensf_req(struct nfc_digital_dev *ddev, void *arg,
+ struct sk_buff *resp)
+{
+ struct digital_sensf_req *sensf_req;
+ int rc;
+
+ if (IS_ERR(resp)) {
+ rc = PTR_ERR(resp);
+ resp = NULL;
+ goto exit;
+ }
+
+ if (!DIGITAL_DRV_CAPS_TG_CRC(ddev)) {
+ rc = digital_skb_check_crc_f(resp);
+ if (rc) {
+ PROTOCOL_ERR("6.4.1.8");
+ goto exit;
+ }
+ }
+
+ if (resp->len != sizeof(struct digital_sensf_req) + 1) {
+ rc = -EINVAL;
+ goto exit;
+ }
+
+ skb_pull(resp, 1);
+ sensf_req = (struct digital_sensf_req *)resp->data;
+
+ if (sensf_req->cmd != DIGITAL_CMD_SENSF_REQ) {
+ rc = -EINVAL;
+ goto exit;
+ }
+
+ rc = digital_tg_send_sensf_res(ddev, sensf_req);
+
+exit:
+ if (rc)
+ digital_poll_next_tech(ddev);
+
+ dev_kfree_skb(resp);
+}
+
+int digital_tg_listen_nfca(struct nfc_digital_dev *ddev, u8 rf_tech)
+{
+ int rc;
+
+ rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech);
+ if (rc)
+ return rc;
+
+ rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
+ NFC_DIGITAL_FRAMING_NFCA_NFC_DEP);
+ if (rc)
+ return rc;
+
+ return digital_tg_listen(ddev, 300, digital_tg_recv_sens_req, NULL);
+}
+
+int digital_tg_listen_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech)
+{
+ int rc;
+ u8 *nfcid2;
+
+ rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, rf_tech);
+ if (rc)
+ return rc;
+
+ rc = digital_tg_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
+ NFC_DIGITAL_FRAMING_NFCF_NFC_DEP);
+ if (rc)
+ return rc;
+
+ nfcid2 = kzalloc(NFC_NFCID2_MAXSIZE, GFP_KERNEL);
+ if (!nfcid2)
+ return -ENOMEM;
+
+ nfcid2[0] = DIGITAL_SENSF_NFCID2_NFC_DEP_B1;
+ nfcid2[1] = DIGITAL_SENSF_NFCID2_NFC_DEP_B2;
+ get_random_bytes(nfcid2 + 2, NFC_NFCID2_MAXSIZE - 2);
+
+ return digital_tg_listen(ddev, 300, digital_tg_recv_sensf_req, nfcid2);
+}
diff --git a/net/nfc/nci/spi.c b/net/nfc/nci/spi.c
index c7cf37ba729..f1d426f10cc 100644
--- a/net/nfc/nci/spi.c
+++ b/net/nfc/nci/spi.c
@@ -21,11 +21,8 @@
#include <linux/export.h>
#include <linux/spi/spi.h>
#include <linux/crc-ccitt.h>
-#include <linux/nfc.h>
#include <net/nfc/nci_core.h>
-#define NCI_SPI_HDR_LEN 4
-#define NCI_SPI_CRC_LEN 2
#define NCI_SPI_ACK_SHIFT 6
#define NCI_SPI_MSB_PAYLOAD_MASK 0x3F
@@ -41,54 +38,48 @@
#define CRC_INIT 0xFFFF
-static int nci_spi_open(struct nci_dev *nci_dev)
-{
- struct nci_spi_dev *ndev = nci_get_drvdata(nci_dev);
-
- return ndev->ops->open(ndev);
-}
-
-static int nci_spi_close(struct nci_dev *nci_dev)
-{
- struct nci_spi_dev *ndev = nci_get_drvdata(nci_dev);
-
- return ndev->ops->close(ndev);
-}
-
-static int __nci_spi_send(struct nci_spi_dev *ndev, struct sk_buff *skb)
+static int __nci_spi_send(struct nci_spi *nspi, struct sk_buff *skb,
+ int cs_change)
{
struct spi_message m;
struct spi_transfer t;
- t.tx_buf = skb->data;
- t.len = skb->len;
- t.cs_change = 0;
- t.delay_usecs = ndev->xfer_udelay;
+ memset(&t, 0, sizeof(struct spi_transfer));
+ /* a NULL skb means we just want the SPI chip select line to raise */
+ if (skb) {
+ t.tx_buf = skb->data;
+ t.len = skb->len;
+ } else {
+ /* still set tx_buf non NULL to make the driver happy */
+ t.tx_buf = &t;
+ t.len = 0;
+ }
+ t.cs_change = cs_change;
+ t.delay_usecs = nspi->xfer_udelay;
spi_message_init(&m);
spi_message_add_tail(&t, &m);
- return spi_sync(ndev->spi, &m);
+ return spi_sync(nspi->spi, &m);
}
-static int nci_spi_send(struct nci_dev *nci_dev, struct sk_buff *skb)
+int nci_spi_send(struct nci_spi *nspi,
+ struct completion *write_handshake_completion,
+ struct sk_buff *skb)
{
- struct nci_spi_dev *ndev = nci_get_drvdata(nci_dev);
unsigned int payload_len = skb->len;
unsigned char *hdr;
int ret;
long completion_rc;
- ndev->ops->deassert_int(ndev);
-
/* add the NCI SPI header to the start of the buffer */
hdr = skb_push(skb, NCI_SPI_HDR_LEN);
hdr[0] = NCI_SPI_DIRECT_WRITE;
- hdr[1] = ndev->acknowledge_mode;
+ hdr[1] = nspi->acknowledge_mode;
hdr[2] = payload_len >> 8;
hdr[3] = payload_len & 0xFF;
- if (ndev->acknowledge_mode == NCI_SPI_CRC_ENABLED) {
+ if (nspi->acknowledge_mode == NCI_SPI_CRC_ENABLED) {
u16 crc;
crc = crc_ccitt(CRC_INIT, skb->data, skb->len);
@@ -96,123 +87,77 @@ static int nci_spi_send(struct nci_dev *nci_dev, struct sk_buff *skb)
*skb_put(skb, 1) = crc & 0xFF;
}
- ret = __nci_spi_send(ndev, skb);
+ if (write_handshake_completion) {
+ /* Trick SPI driver to raise chip select */
+ ret = __nci_spi_send(nspi, NULL, 1);
+ if (ret)
+ goto done;
- kfree_skb(skb);
- ndev->ops->assert_int(ndev);
+ /* wait for NFC chip hardware handshake to complete */
+ if (wait_for_completion_timeout(write_handshake_completion,
+ msecs_to_jiffies(1000)) == 0) {
+ ret = -ETIME;
+ goto done;
+ }
+ }
- if (ret != 0 || ndev->acknowledge_mode == NCI_SPI_CRC_DISABLED)
+ ret = __nci_spi_send(nspi, skb, 0);
+ if (ret != 0 || nspi->acknowledge_mode == NCI_SPI_CRC_DISABLED)
goto done;
- init_completion(&ndev->req_completion);
- completion_rc =
- wait_for_completion_interruptible_timeout(&ndev->req_completion,
- NCI_SPI_SEND_TIMEOUT);
+ init_completion(&nspi->req_completion);
+ completion_rc = wait_for_completion_interruptible_timeout(
+ &nspi->req_completion,
+ NCI_SPI_SEND_TIMEOUT);
- if (completion_rc <= 0 || ndev->req_result == ACKNOWLEDGE_NACK)
+ if (completion_rc <= 0 || nspi->req_result == ACKNOWLEDGE_NACK)
ret = -EIO;
done:
+ kfree_skb(skb);
+
return ret;
}
-
-static struct nci_ops nci_spi_ops = {
- .open = nci_spi_open,
- .close = nci_spi_close,
- .send = nci_spi_send,
-};
+EXPORT_SYMBOL_GPL(nci_spi_send);
/* ---- Interface to NCI SPI drivers ---- */
/**
- * nci_spi_allocate_device - allocate a new nci spi device
+ * nci_spi_allocate_spi - allocate a new nci spi
*
* @spi: SPI device
- * @ops: device operations
- * @supported_protocols: NFC protocols supported by the device
- * @supported_se: NFC Secure Elements supported by the device
- * @acknowledge_mode: Acknowledge mode used by the device
+ * @acknowledge_mode: Acknowledge mode used by the NFC device
* @delay: delay between transactions in us
+ * @ndev: nci dev to send incoming nci frames to
*/
-struct nci_spi_dev *nci_spi_allocate_device(struct spi_device *spi,
- struct nci_spi_ops *ops,
- u32 supported_protocols,
- u32 supported_se,
- u8 acknowledge_mode,
- unsigned int delay)
+struct nci_spi *nci_spi_allocate_spi(struct spi_device *spi,
+ u8 acknowledge_mode, unsigned int delay,
+ struct nci_dev *ndev)
{
- struct nci_spi_dev *ndev;
- int tailroom = 0;
+ struct nci_spi *nspi;
- if (!ops->open || !ops->close || !ops->assert_int || !ops->deassert_int)
+ nspi = devm_kzalloc(&spi->dev, sizeof(struct nci_spi), GFP_KERNEL);
+ if (!nspi)
return NULL;
- if (!supported_protocols)
- return NULL;
-
- ndev = devm_kzalloc(&spi->dev, sizeof(struct nci_dev), GFP_KERNEL);
- if (!ndev)
- return NULL;
+ nspi->acknowledge_mode = acknowledge_mode;
+ nspi->xfer_udelay = delay;
- ndev->ops = ops;
- ndev->acknowledge_mode = acknowledge_mode;
- ndev->xfer_udelay = delay;
+ nspi->spi = spi;
+ nspi->ndev = ndev;
- if (acknowledge_mode == NCI_SPI_CRC_ENABLED)
- tailroom += NCI_SPI_CRC_LEN;
-
- ndev->nci_dev = nci_allocate_device(&nci_spi_ops, supported_protocols,
- NCI_SPI_HDR_LEN, tailroom);
- if (!ndev->nci_dev)
- return NULL;
-
- nci_set_drvdata(ndev->nci_dev, ndev);
-
- return ndev;
+ return nspi;
}
-EXPORT_SYMBOL_GPL(nci_spi_allocate_device);
+EXPORT_SYMBOL_GPL(nci_spi_allocate_spi);
-/**
- * nci_spi_free_device - deallocate nci spi device
- *
- * @ndev: The nci spi device to deallocate
- */
-void nci_spi_free_device(struct nci_spi_dev *ndev)
-{
- nci_free_device(ndev->nci_dev);
-}
-EXPORT_SYMBOL_GPL(nci_spi_free_device);
-
-/**
- * nci_spi_register_device - register a nci spi device in the nfc subsystem
- *
- * @pdev: The nci spi device to register
- */
-int nci_spi_register_device(struct nci_spi_dev *ndev)
-{
- return nci_register_device(ndev->nci_dev);
-}
-EXPORT_SYMBOL_GPL(nci_spi_register_device);
-
-/**
- * nci_spi_unregister_device - unregister a nci spi device in the nfc subsystem
- *
- * @dev: The nci spi device to unregister
- */
-void nci_spi_unregister_device(struct nci_spi_dev *ndev)
-{
- nci_unregister_device(ndev->nci_dev);
-}
-EXPORT_SYMBOL_GPL(nci_spi_unregister_device);
-
-static int send_acknowledge(struct nci_spi_dev *ndev, u8 acknowledge)
+static int send_acknowledge(struct nci_spi *nspi, u8 acknowledge)
{
struct sk_buff *skb;
unsigned char *hdr;
u16 crc;
int ret;
- skb = nci_skb_alloc(ndev->nci_dev, 0, GFP_KERNEL);
+ skb = nci_skb_alloc(nspi->ndev, 0, GFP_KERNEL);
/* add the NCI SPI header to the start of the buffer */
hdr = skb_push(skb, NCI_SPI_HDR_LEN);
@@ -225,14 +170,14 @@ static int send_acknowledge(struct nci_spi_dev *ndev, u8 acknowledge)
*skb_put(skb, 1) = crc >> 8;
*skb_put(skb, 1) = crc & 0xFF;
- ret = __nci_spi_send(ndev, skb);
+ ret = __nci_spi_send(nspi, skb, 0);
kfree_skb(skb);
return ret;
}
-static struct sk_buff *__nci_spi_recv_frame(struct nci_spi_dev *ndev)
+static struct sk_buff *__nci_spi_read(struct nci_spi *nspi)
{
struct sk_buff *skb;
struct spi_message m;
@@ -242,43 +187,49 @@ static struct sk_buff *__nci_spi_recv_frame(struct nci_spi_dev *ndev)
int ret;
spi_message_init(&m);
+
+ memset(&tx, 0, sizeof(struct spi_transfer));
req[0] = NCI_SPI_DIRECT_READ;
- req[1] = ndev->acknowledge_mode;
+ req[1] = nspi->acknowledge_mode;
tx.tx_buf = req;
tx.len = 2;
tx.cs_change = 0;
spi_message_add_tail(&tx, &m);
+
+ memset(&rx, 0, sizeof(struct spi_transfer));
rx.rx_buf = resp_hdr;
rx.len = 2;
rx.cs_change = 1;
spi_message_add_tail(&rx, &m);
- ret = spi_sync(ndev->spi, &m);
+ ret = spi_sync(nspi->spi, &m);
if (ret)
return NULL;
- if (ndev->acknowledge_mode == NCI_SPI_CRC_ENABLED)
+ if (nspi->acknowledge_mode == NCI_SPI_CRC_ENABLED)
rx_len = ((resp_hdr[0] & NCI_SPI_MSB_PAYLOAD_MASK) << 8) +
resp_hdr[1] + NCI_SPI_CRC_LEN;
else
rx_len = (resp_hdr[0] << 8) | resp_hdr[1];
- skb = nci_skb_alloc(ndev->nci_dev, rx_len, GFP_KERNEL);
+ skb = nci_skb_alloc(nspi->ndev, rx_len, GFP_KERNEL);
if (!skb)
return NULL;
spi_message_init(&m);
+
+ memset(&rx, 0, sizeof(struct spi_transfer));
rx.rx_buf = skb_put(skb, rx_len);
rx.len = rx_len;
rx.cs_change = 0;
- rx.delay_usecs = ndev->xfer_udelay;
+ rx.delay_usecs = nspi->xfer_udelay;
spi_message_add_tail(&rx, &m);
- ret = spi_sync(ndev->spi, &m);
+ ret = spi_sync(nspi->spi, &m);
if (ret)
goto receive_error;
- if (ndev->acknowledge_mode == NCI_SPI_CRC_ENABLED) {
+ if (nspi->acknowledge_mode == NCI_SPI_CRC_ENABLED) {
*skb_push(skb, 1) = resp_hdr[1];
*skb_push(skb, 1) = resp_hdr[0];
}
@@ -318,61 +269,53 @@ static u8 nci_spi_get_ack(struct sk_buff *skb)
}
/**
- * nci_spi_recv_frame - receive frame from NCI SPI drivers
+ * nci_spi_read - read frame from NCI SPI drivers
*
- * @ndev: The nci spi device
+ * @nspi: The nci spi
* Context: can sleep
*
* This call may only be used from a context that may sleep. The sleep
* is non-interruptible, and has no timeout.
*
- * It returns zero on success, else a negative error code.
+ * It returns an allocated skb containing the frame on success, or NULL.
*/
-int nci_spi_recv_frame(struct nci_spi_dev *ndev)
+struct sk_buff *nci_spi_read(struct nci_spi *nspi)
{
struct sk_buff *skb;
- int ret = 0;
-
- ndev->ops->deassert_int(ndev);
/* Retrieve frame from SPI */
- skb = __nci_spi_recv_frame(ndev);
- if (!skb) {
- ret = -EIO;
+ skb = __nci_spi_read(nspi);
+ if (!skb)
goto done;
- }
- if (ndev->acknowledge_mode == NCI_SPI_CRC_ENABLED) {
+ if (nspi->acknowledge_mode == NCI_SPI_CRC_ENABLED) {
if (!nci_spi_check_crc(skb)) {
- send_acknowledge(ndev, ACKNOWLEDGE_NACK);
+ send_acknowledge(nspi, ACKNOWLEDGE_NACK);
goto done;
}
/* In case of acknowledged mode: if ACK or NACK received,
* unblock completion of latest frame sent.
*/
- ndev->req_result = nci_spi_get_ack(skb);
- if (ndev->req_result)
- complete(&ndev->req_completion);
+ nspi->req_result = nci_spi_get_ack(skb);
+ if (nspi->req_result)
+ complete(&nspi->req_completion);
}
/* If there is no payload (ACK/NACK only frame),
* free the socket buffer
*/
- if (skb->len == 0) {
+ if (!skb->len) {
kfree_skb(skb);
+ skb = NULL;
goto done;
}
- if (ndev->acknowledge_mode == NCI_SPI_CRC_ENABLED)
- send_acknowledge(ndev, ACKNOWLEDGE_ACK);
-
- /* Forward skb to NCI core layer */
- ret = nci_recv_frame(ndev->nci_dev, skb);
+ if (nspi->acknowledge_mode == NCI_SPI_CRC_ENABLED)
+ send_acknowledge(nspi, ACKNOWLEDGE_ACK);
done:
- ndev->ops->assert_int(ndev);
- return ret;
+ return skb;
}
-EXPORT_SYMBOL_GPL(nci_spi_recv_frame);
+EXPORT_SYMBOL_GPL(nci_spi_read);
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index 68063b2025d..a9b2342d525 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -30,8 +30,8 @@
#include "nfc.h"
#include "llcp.h"
-static struct genl_multicast_group nfc_genl_event_mcgrp = {
- .name = NFC_GENL_MCAST_EVENT_NAME,
+static const struct genl_multicast_group nfc_genl_mcgrps[] = {
+ { .name = NFC_GENL_MCAST_EVENT_NAME, },
};
static struct genl_family nfc_genl_family = {
@@ -58,6 +58,7 @@ static const struct nla_policy nfc_genl_policy[NFC_ATTR_MAX + 1] = {
[NFC_ATTR_LLC_SDP] = { .type = NLA_NESTED },
[NFC_ATTR_FIRMWARE_NAME] = { .type = NLA_STRING,
.len = NFC_FIRMWARE_NAME_MAXSIZE },
+ [NFC_ATTR_SE_APDU] = { .type = NLA_BINARY },
};
static const struct nla_policy nfc_sdp_genl_policy[NFC_SDP_ATTR_MAX + 1] = {
@@ -193,7 +194,7 @@ int nfc_genl_targets_found(struct nfc_dev *dev)
genlmsg_end(msg, hdr);
- return genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
+ return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
nla_put_failure:
genlmsg_cancel(msg, hdr);
@@ -222,7 +223,7 @@ int nfc_genl_target_lost(struct nfc_dev *dev, u32 target_idx)
genlmsg_end(msg, hdr);
- genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
+ genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
return 0;
@@ -254,7 +255,7 @@ int nfc_genl_tm_activated(struct nfc_dev *dev, u32 protocol)
genlmsg_end(msg, hdr);
- genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
+ genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
return 0;
@@ -284,7 +285,7 @@ int nfc_genl_tm_deactivated(struct nfc_dev *dev)
genlmsg_end(msg, hdr);
- genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
+ genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
return 0;
@@ -317,7 +318,7 @@ int nfc_genl_device_added(struct nfc_dev *dev)
genlmsg_end(msg, hdr);
- genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
+ genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
return 0;
@@ -347,7 +348,7 @@ int nfc_genl_device_removed(struct nfc_dev *dev)
genlmsg_end(msg, hdr);
- genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
+ genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
return 0;
@@ -413,7 +414,7 @@ int nfc_genl_llc_send_sdres(struct nfc_dev *dev, struct hlist_head *sdres_list)
genlmsg_end(msg, hdr);
- return genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
+ return genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
nla_put_failure:
genlmsg_cancel(msg, hdr);
@@ -447,7 +448,7 @@ int nfc_genl_se_added(struct nfc_dev *dev, u32 se_idx, u16 type)
genlmsg_end(msg, hdr);
- genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
+ genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
return 0;
@@ -478,7 +479,7 @@ int nfc_genl_se_removed(struct nfc_dev *dev, u32 se_idx)
genlmsg_end(msg, hdr);
- genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
+ genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
return 0;
@@ -599,7 +600,7 @@ int nfc_genl_dep_link_up_event(struct nfc_dev *dev, u32 target_idx,
dev->dep_link_up = true;
- genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
+ genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
return 0;
@@ -631,7 +632,7 @@ int nfc_genl_dep_link_down_event(struct nfc_dev *dev)
genlmsg_end(msg, hdr);
- genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_ATOMIC);
+ genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_ATOMIC);
return 0;
@@ -1136,7 +1137,7 @@ int nfc_genl_fw_download_done(struct nfc_dev *dev, const char *firmware_name,
genlmsg_end(msg, hdr);
- genlmsg_multicast(msg, 0, nfc_genl_event_mcgrp.id, GFP_KERNEL);
+ genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
return 0;
@@ -1278,7 +1279,92 @@ static int nfc_genl_dump_ses_done(struct netlink_callback *cb)
return 0;
}
-static struct genl_ops nfc_genl_ops[] = {
+struct se_io_ctx {
+ u32 dev_idx;
+ u32 se_idx;
+};
+
+static void se_io_cb(void *context, u8 *apdu, size_t apdu_len, int err)
+{
+ struct se_io_ctx *ctx = context;
+ struct sk_buff *msg;
+ void *hdr;
+
+ msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL);
+ if (!msg) {
+ kfree(ctx);
+ return;
+ }
+
+ hdr = genlmsg_put(msg, 0, 0, &nfc_genl_family, 0,
+ NFC_CMD_SE_IO);
+ if (!hdr)
+ goto free_msg;
+
+ if (nla_put_u32(msg, NFC_ATTR_DEVICE_INDEX, ctx->dev_idx) ||
+ nla_put_u32(msg, NFC_ATTR_SE_INDEX, ctx->se_idx) ||
+ nla_put(msg, NFC_ATTR_SE_APDU, apdu_len, apdu))
+ goto nla_put_failure;
+
+ genlmsg_end(msg, hdr);
+
+ genlmsg_multicast(&nfc_genl_family, msg, 0, 0, GFP_KERNEL);
+
+ kfree(ctx);
+
+ return;
+
+nla_put_failure:
+ genlmsg_cancel(msg, hdr);
+free_msg:
+ nlmsg_free(msg);
+ kfree(ctx);
+
+ return;
+}
+
+static int nfc_genl_se_io(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nfc_dev *dev;
+ struct se_io_ctx *ctx;
+ u32 dev_idx, se_idx;
+ u8 *apdu;
+ size_t apdu_len;
+
+ if (!info->attrs[NFC_ATTR_DEVICE_INDEX] ||
+ !info->attrs[NFC_ATTR_SE_INDEX] ||
+ !info->attrs[NFC_ATTR_SE_APDU])
+ return -EINVAL;
+
+ dev_idx = nla_get_u32(info->attrs[NFC_ATTR_DEVICE_INDEX]);
+ se_idx = nla_get_u32(info->attrs[NFC_ATTR_SE_INDEX]);
+
+ dev = nfc_get_device(dev_idx);
+ if (!dev)
+ return -ENODEV;
+
+ if (!dev->ops || !dev->ops->se_io)
+ return -ENOTSUPP;
+
+ apdu_len = nla_len(info->attrs[NFC_ATTR_SE_APDU]);
+ if (apdu_len == 0)
+ return -EINVAL;
+
+ apdu = nla_data(info->attrs[NFC_ATTR_SE_APDU]);
+ if (!apdu)
+ return -EINVAL;
+
+ ctx = kzalloc(sizeof(struct se_io_ctx), GFP_KERNEL);
+ if (!ctx)
+ return -ENOMEM;
+
+ ctx->dev_idx = dev_idx;
+ ctx->se_idx = se_idx;
+
+ return dev->ops->se_io(dev, se_idx, apdu, apdu_len, se_io_cb, ctx);
+}
+
+static const struct genl_ops nfc_genl_ops[] = {
{
.cmd = NFC_CMD_GET_DEVICE,
.doit = nfc_genl_get_device,
@@ -1358,6 +1444,11 @@ static struct genl_ops nfc_genl_ops[] = {
.done = nfc_genl_dump_ses_done,
.policy = nfc_genl_policy,
},
+ {
+ .cmd = NFC_CMD_SE_IO,
+ .doit = nfc_genl_se_io,
+ .policy = nfc_genl_policy,
+ },
};
@@ -1445,16 +1536,15 @@ int __init nfc_genl_init(void)
{
int rc;
- rc = genl_register_family_with_ops(&nfc_genl_family, nfc_genl_ops,
- ARRAY_SIZE(nfc_genl_ops));
+ rc = genl_register_family_with_ops_groups(&nfc_genl_family,
+ nfc_genl_ops,
+ nfc_genl_mcgrps);
if (rc)
return rc;
- rc = genl_register_mc_group(&nfc_genl_family, &nfc_genl_event_mcgrp);
-
netlink_register_notifier(&nl_notifier);
- return rc;
+ return 0;
}
/**
diff --git a/net/nfc/rawsock.c b/net/nfc/rawsock.c
index 313bf1bc848..cd958b381f9 100644
--- a/net/nfc/rawsock.c
+++ b/net/nfc/rawsock.c
@@ -142,11 +142,11 @@ static void rawsock_data_exchange_complete(void *context, struct sk_buff *skb,
err = rawsock_add_header(skb);
if (err)
- goto error;
+ goto error_skb;
err = sock_queue_rcv_skb(sk, skb);
if (err)
- goto error;
+ goto error_skb;
spin_lock_bh(&sk->sk_write_queue.lock);
if (!skb_queue_empty(&sk->sk_write_queue))
@@ -158,6 +158,9 @@ static void rawsock_data_exchange_complete(void *context, struct sk_buff *skb,
sock_put(sk);
return;
+error_skb:
+ kfree_skb(skb);
+
error:
rawsock_report_error(sk, err);
sock_put(sk);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-05 21:10:45 +0000