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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>
hifive-unleashed-5.1
Christophe Ricard 2014-05-13 22:03:42 +02:00 committed by Samuel Ortiz
parent a779b8878c
commit 7974728094
1 changed files with 72 additions and 1 deletions
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73
drivers/nfc/st21nfca/st21nfca.c
View File

@ -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);