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-rw-r--r--net/nfc/digital.h39
-rw-r--r--net/nfc/digital_core.c81
-rw-r--r--net/nfc/digital_dep.c346
-rw-r--r--net/nfc/digital_technology.c296
4 files changed, 755 insertions, 7 deletions
diff --git a/net/nfc/digital.h b/net/nfc/digital.h
index 5254a872522b..586075a3feed 100644
--- a/net/nfc/digital.h
+++ b/net/nfc/digital.h
@@ -56,8 +56,9 @@ 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, u16 timeout,
- nfc_digital_cmd_complete_t cmd_cb, void *cb_context);
+ 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,
@@ -65,8 +66,8 @@ static inline int digital_in_send_cmd(struct nfc_digital_dev *ddev,
nfc_digital_cmd_complete_t cmd_cb,
void *cb_context)
{
- return digital_send_cmd(ddev, DIGITAL_CMD_IN_SEND, skb, timeout, cmd_cb,
- 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);
@@ -86,6 +87,36 @@ 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
diff --git a/net/nfc/digital_core.c b/net/nfc/digital_core.c
index dccfcccf6998..66151fc5d990 100644
--- a/net/nfc/digital_core.c
+++ b/net/nfc/digital_core.c
@@ -32,6 +32,7 @@ struct digital_cmd {
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;
@@ -131,6 +132,7 @@ static void digital_wq_cmd_complete(struct work_struct *work)
cmd->cmd_cb(ddev, cmd->cb_context, cmd->resp);
+ kfree(cmd->mdaa_params);
kfree(cmd);
schedule_work(&ddev->cmd_work);
@@ -150,6 +152,7 @@ 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);
@@ -174,6 +177,24 @@ static void digital_wq_cmd(struct work_struct *work)
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", cmd->type);
return;
@@ -189,14 +210,16 @@ static void digital_wq_cmd(struct work_struct *work)
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, u16 timeout,
- nfc_digital_cmd_complete_t cmd_cb, void *cb_context)
+ 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;
@@ -207,6 +230,7 @@ int digital_send_cmd(struct nfc_digital_dev *ddev, u8 cmd_type,
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);
@@ -231,6 +255,38 @@ int digital_in_configure_hw(struct nfc_digital_dev *ddev, int type, int param)
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", 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)
{
@@ -412,6 +468,22 @@ static int digital_start_poll(struct nfc_dev *nfc_dev, __u32 im_protocols,
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",
matching_im_protocols, matching_tm_protocols);
@@ -496,7 +568,9 @@ static void digital_deactivate_target(struct nfc_dev *nfc_dev,
static int digital_tg_send(struct nfc_dev *dev, struct sk_buff *skb)
{
- return -EOPNOTSUPP;
+ 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,
@@ -654,6 +728,7 @@ void nfc_digital_unregister_device(struct nfc_digital_dev *ddev)
list_for_each_entry_safe(cmd, n, &ddev->cmd_queue, queue) {
list_del(&cmd->queue);
+ kfree(cmd->mdaa_params);
kfree(cmd);
}
}
diff --git a/net/nfc/digital_dep.c b/net/nfc/digital_dep.c
index be984c4204d2..810d00c9cd5d 100644
--- a/net/nfc/digital_dep.c
+++ b/net/nfc/digital_dep.c
@@ -379,3 +379,349 @@ int digital_in_send_dep_req(struct nfc_digital_dev *ddev,
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_DBG("DIGITAL_NFC_DEP_PFB_I_PDU");
+ 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");
+ rc = -EINVAL;
+ goto exit;
+ break;
+ case DIGITAL_NFC_DEP_PFB_SUPERVISOR_PDU:
+ PR_ERR("Received a SUPERVISOR PDU");
+ 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", 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
index 0c28f600fd1c..564735fbbd8f 100644
--- a/net/nfc/digital_technology.c
+++ b/net/nfc/digital_technology.c
@@ -475,3 +475,299 @@ int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech)
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);
+}
+
+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);
+}