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authorChristophe Ricard <christophe.ricard@gmail.com>2014-05-13 22:03:42 +0200
committerSamuel Ortiz <sameo@linux.intel.com>2014-05-20 00:48:28 +0200
commit7974728094d35f38775417a26d8f30ea3602496a (patch)
tree706107db0e911312647d4b153a8df265fc5a8b09 /drivers
parenta779b8878c20a5cafff26d774eed4d36a903882a (diff)
NFC: st21nfca: Add ISO15693 Reader/Writer support
Add support for ISO/IEC 15693 RF technology and Type 5 tags. ISO15963 is using proprietary gate 12. Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/nfc/st21nfca/st21nfca.c73
1 files changed, 72 insertions, 1 deletions
diff --git a/drivers/nfc/st21nfca/st21nfca.c b/drivers/nfc/st21nfca/st21nfca.c
index d9ee3d0c1a78..51e0f00b3a4f 100644
--- a/drivers/nfc/st21nfca/st21nfca.c
+++ b/drivers/nfc/st21nfca/st21nfca.c
@@ -33,6 +33,7 @@
#define ST21NFCA_RF_READER_CMD_PRESENCE_CHECK 0x30
#define ST21NFCA_RF_READER_ISO15693_GATE 0x12
+#define ST21NFCA_RF_READER_ISO15693_INVENTORY 0x01
/*
* Reader gate for communication with contact-less cards using Type A
@@ -70,6 +71,7 @@ static struct nfc_hci_gate st21nfca_gates[] = {
{ST21NFCA_DEVICE_MGNT_GATE, ST21NFCA_DEVICE_MGNT_PIPE},
{ST21NFCA_RF_READER_F_GATE, NFC_HCI_INVALID_PIPE},
{ST21NFCA_RF_READER_14443_3_A_GATE, NFC_HCI_INVALID_PIPE},
+ {ST21NFCA_RF_READER_ISO15693_GATE, NFC_HCI_INVALID_PIPE},
};
struct st21nfca_pipe_info {
@@ -421,6 +423,34 @@ exit:
return r;
}
+static int st21nfca_get_iso15693_inventory(struct nfc_hci_dev *hdev,
+ struct nfc_target *target)
+{
+ int r;
+ struct sk_buff *inventory_skb = NULL;
+
+ r = nfc_hci_get_param(hdev, ST21NFCA_RF_READER_ISO15693_GATE,
+ ST21NFCA_RF_READER_ISO15693_INVENTORY,
+ &inventory_skb);
+ if (r < 0)
+ goto exit;
+
+ skb_pull(inventory_skb, 2);
+
+ if (inventory_skb->len == 0 ||
+ inventory_skb->len > NFC_ISO15693_UID_MAXSIZE) {
+ r = -EPROTO;
+ goto exit;
+ }
+
+ memcpy(target->iso15693_uid, inventory_skb->data, inventory_skb->len);
+ target->iso15693_dsfid = inventory_skb->data[1];
+ target->is_iso15693 = 1;
+exit:
+ kfree_skb(inventory_skb);
+ return r;
+}
+
static int st21nfca_hci_target_from_gate(struct nfc_hci_dev *hdev, u8 gate,
struct nfc_target *target)
{
@@ -462,6 +492,12 @@ static int st21nfca_hci_target_from_gate(struct nfc_hci_dev *hdev, u8 gate,
}
break;
+ case ST21NFCA_RF_READER_ISO15693_GATE:
+ target->supported_protocols = NFC_PROTO_ISO15693_MASK;
+ r = st21nfca_get_iso15693_inventory(hdev, target);
+ if (r < 0)
+ return r;
+ break;
default:
return -EPROTO;
}
@@ -469,6 +505,25 @@ static int st21nfca_hci_target_from_gate(struct nfc_hci_dev *hdev, u8 gate,
return 0;
}
+#define ST21NFCA_CB_TYPE_READER_ISO15693 1
+static void st21nfca_hci_data_exchange_cb(void *context, struct sk_buff *skb,
+ int err)
+{
+ struct st21nfca_hci_info *info = context;
+
+ switch (info->async_cb_type) {
+ case ST21NFCA_CB_TYPE_READER_ISO15693:
+ if (err == 0)
+ skb_trim(skb, skb->len - 1);
+ info->async_cb(info->async_cb_context, skb, err);
+ break;
+ default:
+ if (err == 0)
+ kfree_skb(skb);
+ break;
+ }
+}
+
/*
* Returns:
* <= 0: driver handled the data exchange
@@ -479,6 +534,8 @@ static int st21nfca_hci_im_transceive(struct nfc_hci_dev *hdev,
struct sk_buff *skb,
data_exchange_cb_t cb, void *cb_context)
{
+ struct st21nfca_hci_info *info = nfc_hci_get_clientdata(hdev);
+
pr_info(DRIVER_DESC ": %s for gate=%d len=%d\n", __func__,
target->hci_reader_gate, skb->len);
@@ -494,6 +551,19 @@ static int st21nfca_hci_im_transceive(struct nfc_hci_dev *hdev,
return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
ST21NFCA_WR_XCHG_DATA, skb->data,
skb->len, cb, cb_context);
+ case ST21NFCA_RF_READER_ISO15693_GATE:
+ info->async_cb_type = ST21NFCA_CB_TYPE_READER_ISO15693;
+ info->async_cb = cb;
+ info->async_cb_context = cb_context;
+
+ *skb_push(skb, 1) = 0x17;
+
+ return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
+ ST21NFCA_WR_XCHG_DATA, skb->data,
+ skb->len,
+ st21nfca_hci_data_exchange_cb,
+ info);
+ break;
default:
return 1;
}
@@ -577,7 +647,8 @@ int st21nfca_hci_probe(void *phy_id, struct nfc_phy_ops *phy_ops,
NFC_PROTO_MIFARE_MASK |
NFC_PROTO_FELICA_MASK |
NFC_PROTO_ISO14443_MASK |
- NFC_PROTO_ISO14443_B_MASK;
+ NFC_PROTO_ISO14443_B_MASK |
+ NFC_PROTO_ISO15693_MASK;
set_bit(NFC_HCI_QUIRK_SHORT_CLEAR, &quirks);