/*
* Returns:
* <= 0: driver handled the data exchange
* 1: driver doesn't especially handle, please do standard processing
*/
static int microread_im_transceive(struct nfc_hci_dev *hdev,
struct nfc_target *target,
struct sk_buff *skb, data_exchange_cb_t cb,
void *cb_context)
{
struct microread_info *info = nfc_hci_get_clientdata(hdev);
u8 control_bits;
u16 crc;
pr_info("data exchange to gate 0x%x\n", target->hci_reader_gate);
if (target->hci_reader_gate == MICROREAD_GATE_ID_P2P_INITIATOR) {
*skb_push(skb, 1) = 0;
return nfc_hci_send_event(hdev, target->hci_reader_gate,
MICROREAD_EVT_P2P_INITIATOR_EXCHANGE_TO_RF,
skb->data, skb->len);
}
switch (target->hci_reader_gate) {
case MICROREAD_GATE_ID_MREAD_ISO_A:
control_bits = 0xCB;
break;
case MICROREAD_GATE_ID_MREAD_ISO_A_3:
control_bits = 0xCB;
break;
case MICROREAD_GATE_ID_MREAD_ISO_B:
control_bits = 0xCB;
break;
case MICROREAD_GATE_ID_MREAD_NFC_T1:
control_bits = 0x1B;
crc = crc_ccitt(0xffff, skb->data, skb->len);
crc = ~crc;
*skb_put(skb, 1) = crc & 0xff;
*skb_put(skb, 1) = crc >> 8;
break;
case MICROREAD_GATE_ID_MREAD_NFC_T3:
control_bits = 0xDB;
break;
default:
pr_info("Abort im_transceive to invalid gate 0x%x\n",
target->hci_reader_gate);
return 1;
}
*skb_push(skb, 1) = control_bits;
info->async_cb_type = MICROREAD_CB_TYPE_READER_ALL;
info->async_cb = cb;
info->async_cb_context = cb_context;
return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
MICROREAD_CMD_MREAD_EXCHANGE,
skb->data, skb->len,
microread_im_transceive_cb, info);
}
/*
* Returns:
* <= 0: driver handled the data exchange
* 1: driver doesn't especially handle, please do standard processing
*/
static int st21nfca_hci_im_transceive(struct nfc_hci_dev *hdev,
struct nfc_target *target,
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);
switch (target->hci_reader_gate) {
case ST21NFCA_RF_READER_F_GATE:
if (target->supported_protocols == NFC_PROTO_NFC_DEP_MASK)
return st21nfca_im_send_dep_req(hdev, skb);
*(u8 *)skb_push(skb, 1) = 0x1a;
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_14443_3_A_GATE:
*(u8 *)skb_push(skb, 1) = 0x1a; /* CTR, see spec:10.2.2.1 */
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;
*(u8 *)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;
}
}
/*
* Returns:
* <= 0: driver handled the data exchange
* 1: driver doesn't especially handle, please do standard processing
*/
static int pn544_hci_im_transceive(struct nfc_hci_dev *hdev,
struct nfc_target *target,
struct sk_buff *skb, data_exchange_cb_t cb,
void *cb_context)
{
struct pn544_hci_info *info = nfc_hci_get_clientdata(hdev);
pr_debug(DRIVER_DESC ": %s for gate=%d\n", __func__,
target->hci_reader_gate);
switch (target->hci_reader_gate) {
case NFC_HCI_RF_READER_A_GATE:
if (target->supported_protocols & NFC_PROTO_MIFARE_MASK) {
/*
* It seems that pn544 is inverting key and UID for
* MIFARE authentication commands.
*/
if (skb->len == MIFARE_CMD_LEN &&
(skb->data[0] == MIFARE_CMD_AUTH_KEY_A ||
skb->data[0] == MIFARE_CMD_AUTH_KEY_B)) {
u8 uid[MIFARE_UID_LEN];
u8 *data = skb->data + MIFARE_CMD_HEADER;
memcpy(uid, data + MIFARE_KEY_LEN,
MIFARE_UID_LEN);
memmove(data + MIFARE_UID_LEN, data,
MIFARE_KEY_LEN);
memcpy(data, uid, MIFARE_UID_LEN);
}
return nfc_hci_send_cmd_async(hdev,
target->hci_reader_gate,
PN544_MIFARE_CMD,
skb->data, skb->len,
cb, cb_context);
} else
return 1;
case PN544_RF_READER_F_GATE:
*skb_push(skb, 1) = 0;
*skb_push(skb, 1) = 0;
info->async_cb_type = PN544_CB_TYPE_READER_F;
info->async_cb = cb;
info->async_cb_context = cb_context;
return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
PN544_FELICA_RAW, skb->data,
skb->len,
pn544_hci_data_exchange_cb, info);
case PN544_RF_READER_JEWEL_GATE:
return nfc_hci_send_cmd_async(hdev, target->hci_reader_gate,
PN544_JEWEL_RAW_CMD, skb->data,
skb->len, cb, cb_context);
case PN544_RF_READER_NFCIP1_INITIATOR_GATE:
*skb_push(skb, 1) = 0;
return nfc_hci_send_event(hdev, target->hci_reader_gate,
PN544_HCI_EVT_SND_DATA, skb->data,
skb->len);
default:
return 1;
}
}
