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Diffstat (limited to 'net/nfc/digital_technology.c')
-rw-r--r--net/nfc/digital_technology.c477
1 files changed, 473 insertions, 4 deletions
diff --git a/net/nfc/digital_technology.c b/net/nfc/digital_technology.c
index 251c8c753eb..c2c1c0189b7 100644
--- a/net/nfc/digital_technology.c
+++ b/net/nfc/digital_technology.c
@@ -30,6 +30,7 @@
#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_T4T(sel_res) ((sel_res) & 0x20)
#define DIGITAL_SEL_RES_IS_NFC_DEP(sel_res) ((sel_res) & 0x40)
#define DIGITAL_SENS_RES_IS_T1T(sens_res) (((sens_res) & 0x0C00) == 0x0C00)
@@ -40,6 +41,24 @@
#define DIGITAL_MIFARE_READ_RES_LEN 16
#define DIGITAL_MIFARE_ACK_RES 0x0A
+#define DIGITAL_CMD_SENSB_REQ 0x05
+#define DIGITAL_SENSB_ADVANCED BIT(5)
+#define DIGITAL_SENSB_EXTENDED BIT(4)
+#define DIGITAL_SENSB_ALLB_REQ BIT(3)
+#define DIGITAL_SENSB_N(n) ((n) & 0x7)
+
+#define DIGITAL_CMD_SENSB_RES 0x50
+
+#define DIGITAL_CMD_ATTRIB_REQ 0x1D
+#define DIGITAL_ATTRIB_P1_TR0_DEFAULT (0x0 << 6)
+#define DIGITAL_ATTRIB_P1_TR1_DEFAULT (0x0 << 4)
+#define DIGITAL_ATTRIB_P1_SUPRESS_EOS BIT(3)
+#define DIGITAL_ATTRIB_P1_SUPRESS_SOS BIT(2)
+#define DIGITAL_ATTRIB_P2_LISTEN_POLL_1 (0x0 << 6)
+#define DIGITAL_ATTRIB_P2_POLL_LISTEN_1 (0x0 << 4)
+#define DIGITAL_ATTRIB_P2_MAX_FRAME_256 0x8
+#define DIGITAL_ATTRIB_P4_DID(n) ((n) & 0xf)
+
#define DIGITAL_CMD_SENSF_REQ 0x00
#define DIGITAL_CMD_SENSF_RES 0x01
@@ -51,6 +70,35 @@
#define DIGITAL_SENSF_REQ_RC_SC 1
#define DIGITAL_SENSF_REQ_RC_AP 2
+#define DIGITAL_CMD_ISO15693_INVENTORY_REQ 0x01
+
+#define DIGITAL_ISO15693_REQ_FLAG_DATA_RATE BIT(1)
+#define DIGITAL_ISO15693_REQ_FLAG_INVENTORY BIT(2)
+#define DIGITAL_ISO15693_REQ_FLAG_NB_SLOTS BIT(5)
+#define DIGITAL_ISO15693_RES_FLAG_ERROR BIT(0)
+#define DIGITAL_ISO15693_RES_IS_VALID(flags) \
+ (!((flags) & DIGITAL_ISO15693_RES_FLAG_ERROR))
+
+#define DIGITAL_ISO_DEP_I_PCB 0x02
+#define DIGITAL_ISO_DEP_PNI(pni) ((pni) & 0x01)
+
+#define DIGITAL_ISO_DEP_PCB_TYPE(pcb) ((pcb) & 0xC0)
+
+#define DIGITAL_ISO_DEP_I_BLOCK 0x00
+
+#define DIGITAL_ISO_DEP_BLOCK_HAS_DID(pcb) ((pcb) & 0x08)
+
+static const u8 digital_ats_fsc[] = {
+ 16, 24, 32, 40, 48, 64, 96, 128,
+};
+
+#define DIGITAL_ATS_FSCI(t0) ((t0) & 0x0F)
+#define DIGITAL_SENSB_FSCI(pi2) (((pi2) & 0xF0) >> 4)
+#define DIGITAL_ATS_MAX_FSC 256
+
+#define DIGITAL_RATS_BYTE1 0xE0
+#define DIGITAL_RATS_PARAM 0x80
+
struct digital_sdd_res {
u8 nfcid1[4];
u8 bcc;
@@ -63,6 +111,32 @@ struct digital_sel_req {
u8 bcc;
} __packed;
+struct digital_sensb_req {
+ u8 cmd;
+ u8 afi;
+ u8 param;
+} __packed;
+
+struct digital_sensb_res {
+ u8 cmd;
+ u8 nfcid0[4];
+ u8 app_data[4];
+ u8 proto_info[3];
+} __packed;
+
+struct digital_attrib_req {
+ u8 cmd;
+ u8 nfcid0[4];
+ u8 param1;
+ u8 param2;
+ u8 param3;
+ u8 param4;
+} __packed;
+
+struct digital_attrib_res {
+ u8 mbli_did;
+} __packed;
+
struct digital_sensf_req {
u8 cmd;
u8 sc1;
@@ -82,9 +156,127 @@ struct digital_sensf_res {
u8 rd[2];
} __packed;
+struct digital_iso15693_inv_req {
+ u8 flags;
+ u8 cmd;
+ u8 mask_len;
+ u64 mask;
+} __packed;
+
+struct digital_iso15693_inv_res {
+ u8 flags;
+ u8 dsfid;
+ u64 uid;
+} __packed;
+
static int digital_in_send_sdd_req(struct nfc_digital_dev *ddev,
struct nfc_target *target);
+int digital_in_iso_dep_pull_sod(struct nfc_digital_dev *ddev,
+ struct sk_buff *skb)
+{
+ u8 pcb;
+ u8 block_type;
+
+ if (skb->len < 1)
+ return -EIO;
+
+ pcb = *skb->data;
+ block_type = DIGITAL_ISO_DEP_PCB_TYPE(pcb);
+
+ /* No support fo R-block nor S-block */
+ if (block_type != DIGITAL_ISO_DEP_I_BLOCK) {
+ pr_err("ISO_DEP R-block and S-block not supported\n");
+ return -EIO;
+ }
+
+ if (DIGITAL_ISO_DEP_BLOCK_HAS_DID(pcb)) {
+ pr_err("DID field in ISO_DEP PCB not supported\n");
+ return -EIO;
+ }
+
+ skb_pull(skb, 1);
+
+ return 0;
+}
+
+int digital_in_iso_dep_push_sod(struct nfc_digital_dev *ddev,
+ struct sk_buff *skb)
+{
+ /*
+ * Chaining not supported so skb->len + 1 PCB byte + 2 CRC bytes must
+ * not be greater than remote FSC
+ */
+ if (skb->len + 3 > ddev->target_fsc)
+ return -EIO;
+
+ skb_push(skb, 1);
+
+ *skb->data = DIGITAL_ISO_DEP_I_PCB | ddev->curr_nfc_dep_pni;
+
+ ddev->curr_nfc_dep_pni =
+ DIGITAL_ISO_DEP_PNI(ddev->curr_nfc_dep_pni + 1);
+
+ return 0;
+}
+
+static void digital_in_recv_ats(struct nfc_digital_dev *ddev, void *arg,
+ struct sk_buff *resp)
+{
+ struct nfc_target *target = arg;
+ u8 fsdi;
+ int rc;
+
+ if (IS_ERR(resp)) {
+ rc = PTR_ERR(resp);
+ resp = NULL;
+ goto exit;
+ }
+
+ if (resp->len < 2) {
+ rc = -EIO;
+ goto exit;
+ }
+
+ fsdi = DIGITAL_ATS_FSCI(resp->data[1]);
+ if (fsdi >= 8)
+ ddev->target_fsc = DIGITAL_ATS_MAX_FSC;
+ else
+ ddev->target_fsc = digital_ats_fsc[fsdi];
+
+ ddev->curr_nfc_dep_pni = 0;
+
+ rc = digital_target_found(ddev, target, NFC_PROTO_ISO14443);
+
+exit:
+ dev_kfree_skb(resp);
+ kfree(target);
+
+ if (rc)
+ digital_poll_next_tech(ddev);
+}
+
+static int digital_in_send_rats(struct nfc_digital_dev *ddev,
+ struct nfc_target *target)
+{
+ int rc;
+ struct sk_buff *skb;
+
+ skb = digital_skb_alloc(ddev, 2);
+ if (!skb)
+ return -ENOMEM;
+
+ *skb_put(skb, 1) = DIGITAL_RATS_BYTE1;
+ *skb_put(skb, 1) = DIGITAL_RATS_PARAM;
+
+ rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_ats,
+ target);
+ if (rc)
+ kfree_skb(skb);
+
+ return rc;
+}
+
static void digital_in_recv_sel_res(struct nfc_digital_dev *ddev, void *arg,
struct sk_buff *resp)
{
@@ -122,8 +314,19 @@ static void digital_in_recv_sel_res(struct nfc_digital_dev *ddev, void *arg,
goto exit_free_skb;
}
+ target->sel_res = sel_res;
+
if (DIGITAL_SEL_RES_IS_T2T(sel_res)) {
nfc_proto = NFC_PROTO_MIFARE;
+ } else if (DIGITAL_SEL_RES_IS_T4T(sel_res)) {
+ rc = digital_in_send_rats(ddev, target);
+ if (rc)
+ goto exit;
+ /*
+ * Skip target_found and don't free it for now. This will be
+ * done when receiving the ATS
+ */
+ goto exit_free_skb;
} else if (DIGITAL_SEL_RES_IS_NFC_DEP(sel_res)) {
nfc_proto = NFC_PROTO_NFC_DEP;
} else {
@@ -131,8 +334,6 @@ static void digital_in_recv_sel_res(struct nfc_digital_dev *ddev, void *arg,
goto exit;
}
- target->sel_res = sel_res;
-
rc = digital_target_found(ddev, target, nfc_proto);
exit:
@@ -375,6 +576,175 @@ int digital_in_recv_mifare_res(struct sk_buff *resp)
return -EIO;
}
+static void digital_in_recv_attrib_res(struct nfc_digital_dev *ddev, void *arg,
+ struct sk_buff *resp)
+{
+ struct nfc_target *target = arg;
+ struct digital_attrib_res *attrib_res;
+ int rc;
+
+ if (IS_ERR(resp)) {
+ rc = PTR_ERR(resp);
+ resp = NULL;
+ goto exit;
+ }
+
+ if (resp->len < sizeof(*attrib_res)) {
+ PROTOCOL_ERR("12.6.2");
+ rc = -EIO;
+ goto exit;
+ }
+
+ attrib_res = (struct digital_attrib_res *)resp->data;
+
+ if (attrib_res->mbli_did & 0x0f) {
+ PROTOCOL_ERR("12.6.2.1");
+ rc = -EIO;
+ goto exit;
+ }
+
+ rc = digital_target_found(ddev, target, NFC_PROTO_ISO14443_B);
+
+exit:
+ dev_kfree_skb(resp);
+ kfree(target);
+
+ if (rc)
+ digital_poll_next_tech(ddev);
+}
+
+static int digital_in_send_attrib_req(struct nfc_digital_dev *ddev,
+ struct nfc_target *target,
+ struct digital_sensb_res *sensb_res)
+{
+ struct digital_attrib_req *attrib_req;
+ struct sk_buff *skb;
+ int rc;
+
+ skb = digital_skb_alloc(ddev, sizeof(*attrib_req));
+ if (!skb)
+ return -ENOMEM;
+
+ attrib_req = (struct digital_attrib_req *)skb_put(skb,
+ sizeof(*attrib_req));
+
+ attrib_req->cmd = DIGITAL_CMD_ATTRIB_REQ;
+ memcpy(attrib_req->nfcid0, sensb_res->nfcid0,
+ sizeof(attrib_req->nfcid0));
+ attrib_req->param1 = DIGITAL_ATTRIB_P1_TR0_DEFAULT |
+ DIGITAL_ATTRIB_P1_TR1_DEFAULT;
+ attrib_req->param2 = DIGITAL_ATTRIB_P2_LISTEN_POLL_1 |
+ DIGITAL_ATTRIB_P2_POLL_LISTEN_1 |
+ DIGITAL_ATTRIB_P2_MAX_FRAME_256;
+ attrib_req->param3 = sensb_res->proto_info[1] & 0x07;
+ attrib_req->param4 = DIGITAL_ATTRIB_P4_DID(0);
+
+ rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_attrib_res,
+ target);
+ if (rc)
+ kfree_skb(skb);
+
+ return rc;
+}
+
+static void digital_in_recv_sensb_res(struct nfc_digital_dev *ddev, void *arg,
+ struct sk_buff *resp)
+{
+ struct nfc_target *target = NULL;
+ struct digital_sensb_res *sensb_res;
+ u8 fsci;
+ int rc;
+
+ if (IS_ERR(resp)) {
+ rc = PTR_ERR(resp);
+ resp = NULL;
+ goto exit;
+ }
+
+ if (resp->len != sizeof(*sensb_res)) {
+ PROTOCOL_ERR("5.6.2.1");
+ rc = -EIO;
+ goto exit;
+ }
+
+ sensb_res = (struct digital_sensb_res *)resp->data;
+
+ if (sensb_res->cmd != DIGITAL_CMD_SENSB_RES) {
+ PROTOCOL_ERR("5.6.2");
+ rc = -EIO;
+ goto exit;
+ }
+
+ if (!(sensb_res->proto_info[1] & BIT(0))) {
+ PROTOCOL_ERR("5.6.2.12");
+ rc = -EIO;
+ goto exit;
+ }
+
+ if (sensb_res->proto_info[1] & BIT(3)) {
+ PROTOCOL_ERR("5.6.2.16");
+ rc = -EIO;
+ goto exit;
+ }
+
+ fsci = DIGITAL_SENSB_FSCI(sensb_res->proto_info[1]);
+ if (fsci >= 8)
+ ddev->target_fsc = DIGITAL_ATS_MAX_FSC;
+ else
+ ddev->target_fsc = digital_ats_fsc[fsci];
+
+ target = kzalloc(sizeof(struct nfc_target), GFP_KERNEL);
+ if (!target) {
+ rc = -ENOMEM;
+ goto exit;
+ }
+
+ rc = digital_in_send_attrib_req(ddev, target, sensb_res);
+
+exit:
+ dev_kfree_skb(resp);
+
+ if (rc) {
+ kfree(target);
+ digital_poll_next_tech(ddev);
+ }
+}
+
+int digital_in_send_sensb_req(struct nfc_digital_dev *ddev, u8 rf_tech)
+{
+ struct digital_sensb_req *sensb_req;
+ struct sk_buff *skb;
+ int rc;
+
+ rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
+ NFC_DIGITAL_RF_TECH_106B);
+ if (rc)
+ return rc;
+
+ rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
+ NFC_DIGITAL_FRAMING_NFCB);
+ if (rc)
+ return rc;
+
+ skb = digital_skb_alloc(ddev, sizeof(*sensb_req));
+ if (!skb)
+ return -ENOMEM;
+
+ sensb_req = (struct digital_sensb_req *)skb_put(skb,
+ sizeof(*sensb_req));
+
+ sensb_req->cmd = DIGITAL_CMD_SENSB_REQ;
+ sensb_req->afi = 0x00; /* All families and sub-families */
+ sensb_req->param = DIGITAL_SENSB_N(0);
+
+ rc = digital_in_send_cmd(ddev, skb, 30, digital_in_recv_sensb_res,
+ NULL);
+ if (rc)
+ kfree_skb(skb);
+
+ return rc;
+}
+
static void digital_in_recv_sensf_res(struct nfc_digital_dev *ddev, void *arg,
struct sk_buff *resp)
{
@@ -473,6 +843,93 @@ int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech)
return rc;
}
+static void digital_in_recv_iso15693_inv_res(struct nfc_digital_dev *ddev,
+ void *arg, struct sk_buff *resp)
+{
+ struct digital_iso15693_inv_res *res;
+ struct nfc_target *target = NULL;
+ int rc;
+
+ if (IS_ERR(resp)) {
+ rc = PTR_ERR(resp);
+ resp = NULL;
+ goto out_free_skb;
+ }
+
+ if (resp->len != sizeof(*res)) {
+ rc = -EIO;
+ goto out_free_skb;
+ }
+
+ res = (struct digital_iso15693_inv_res *)resp->data;
+
+ if (!DIGITAL_ISO15693_RES_IS_VALID(res->flags)) {
+ PROTOCOL_ERR("ISO15693 - 10.3.1");
+ rc = -EINVAL;
+ goto out_free_skb;
+ }
+
+ target = kzalloc(sizeof(*target), GFP_KERNEL);
+ if (!target) {
+ rc = -ENOMEM;
+ goto out_free_skb;
+ }
+
+ target->is_iso15693 = 1;
+ target->iso15693_dsfid = res->dsfid;
+ memcpy(target->iso15693_uid, &res->uid, sizeof(target->iso15693_uid));
+
+ rc = digital_target_found(ddev, target, NFC_PROTO_ISO15693);
+
+ kfree(target);
+
+out_free_skb:
+ dev_kfree_skb(resp);
+
+ if (rc)
+ digital_poll_next_tech(ddev);
+}
+
+int digital_in_send_iso15693_inv_req(struct nfc_digital_dev *ddev, u8 rf_tech)
+{
+ struct digital_iso15693_inv_req *req;
+ struct sk_buff *skb;
+ int rc;
+
+ rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH,
+ NFC_DIGITAL_RF_TECH_ISO15693);
+ if (rc)
+ return rc;
+
+ rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING,
+ NFC_DIGITAL_FRAMING_ISO15693_INVENTORY);
+ if (rc)
+ return rc;
+
+ skb = digital_skb_alloc(ddev, sizeof(*req));
+ if (!skb)
+ return -ENOMEM;
+
+ skb_put(skb, sizeof(*req) - sizeof(req->mask)); /* No mask */
+ req = (struct digital_iso15693_inv_req *)skb->data;
+
+ /* Single sub-carrier, high data rate, no AFI, single slot
+ * Inventory command
+ */
+ req->flags = DIGITAL_ISO15693_REQ_FLAG_DATA_RATE |
+ DIGITAL_ISO15693_REQ_FLAG_INVENTORY |
+ DIGITAL_ISO15693_REQ_FLAG_NB_SLOTS;
+ req->cmd = DIGITAL_CMD_ISO15693_INVENTORY_REQ;
+ req->mask_len = 0;
+
+ rc = digital_in_send_cmd(ddev, skb, 30,
+ digital_in_recv_iso15693_inv_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;
@@ -634,6 +1091,18 @@ exit:
dev_kfree_skb(resp);
}
+static void digital_tg_recv_atr_or_sensf_req(struct nfc_digital_dev *ddev,
+ void *arg, struct sk_buff *resp)
+{
+ if (!IS_ERR(resp) && (resp->len >= 2) &&
+ (resp->data[1] == DIGITAL_CMD_SENSF_REQ))
+ digital_tg_recv_sensf_req(ddev, arg, resp);
+ else
+ digital_tg_recv_atr_req(ddev, arg, resp);
+
+ return;
+}
+
static int digital_tg_send_sensf_res(struct nfc_digital_dev *ddev,
struct digital_sensf_req *sensf_req)
{
@@ -644,7 +1113,7 @@ static int digital_tg_send_sensf_res(struct nfc_digital_dev *ddev,
size = sizeof(struct digital_sensf_res);
- if (sensf_req->rc != DIGITAL_SENSF_REQ_RC_NONE)
+ if (sensf_req->rc == DIGITAL_SENSF_REQ_RC_NONE)
size -= sizeof(sensf_res->rd);
skb = digital_skb_alloc(ddev, size);
@@ -679,7 +1148,7 @@ static int digital_tg_send_sensf_res(struct nfc_digital_dev *ddev,
digital_skb_add_crc_f(skb);
rc = digital_tg_send_cmd(ddev, skb, 300,
- digital_tg_recv_atr_req, NULL);
+ digital_tg_recv_atr_or_sensf_req, NULL);
if (rc)
kfree_skb(skb);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-10 01:44:46 +0000