diff options
Diffstat (limited to 'net/nfc')
| -rw-r--r-- | net/nfc/digital_dep.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/net/nfc/digital_dep.c b/net/nfc/digital_dep.c index e1638dab076d..b60aa35c074f 100644 --- a/net/nfc/digital_dep.c +++ b/net/nfc/digital_dep.c @@ -33,6 +33,8 @@ #define DIGITAL_ATR_REQ_MAX_SIZE 64 #define DIGITAL_LR_BITS_PAYLOAD_SIZE_254B 0x30 +#define DIGITAL_FSL_BITS_PAYLOAD_SIZE_254B \ + (DIGITAL_LR_BITS_PAYLOAD_SIZE_254B >> 4) #define DIGITAL_GB_BIT 0x02 #define DIGITAL_NFC_DEP_PFB_TYPE(pfb) ((pfb) & 0xE0) @@ -127,6 +129,98 @@ static int digital_skb_pull_dep_sod(struct nfc_digital_dev *ddev, return 0; } +static void digital_in_recv_psl_res(struct nfc_digital_dev *ddev, void *arg, + struct sk_buff *resp) +{ + struct nfc_target *target = arg; + struct digital_psl_res *psl_res; + int rc; + + 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_res = (struct digital_psl_res *)resp->data; + + if ((resp->len != sizeof(*psl_res)) || + (psl_res->dir != DIGITAL_NFC_DEP_FRAME_DIR_IN) || + (psl_res->cmd != DIGITAL_CMD_PSL_RES)) { + rc = -EIO; + goto exit; + } + + rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_RF_TECH, + NFC_DIGITAL_RF_TECH_424F); + if (rc) + goto exit; + + rc = digital_in_configure_hw(ddev, NFC_DIGITAL_CONFIG_FRAMING, + NFC_DIGITAL_FRAMING_NFCF_NFC_DEP); + if (rc) + goto exit; + + if (!DIGITAL_DRV_CAPS_IN_CRC(ddev) && + (ddev->curr_rf_tech == NFC_DIGITAL_RF_TECH_106A)) { + ddev->skb_add_crc = digital_skb_add_crc_f; + ddev->skb_check_crc = digital_skb_check_crc_f; + } + + ddev->curr_rf_tech = NFC_DIGITAL_RF_TECH_424F; + + nfc_dep_link_is_up(ddev->nfc_dev, target->idx, NFC_COMM_ACTIVE, + NFC_RF_INITIATOR); + + ddev->curr_nfc_dep_pni = 0; + +exit: + dev_kfree_skb(resp); + + if (rc) + ddev->curr_protocol = 0; +} + +static int digital_in_send_psl_req(struct nfc_digital_dev *ddev, + struct nfc_target *target) +{ + struct sk_buff *skb; + struct digital_psl_req *psl_req; + + skb = digital_skb_alloc(ddev, sizeof(*psl_req)); + if (!skb) + return -ENOMEM; + + skb_put(skb, sizeof(*psl_req)); + + psl_req = (struct digital_psl_req *)skb->data; + + psl_req->dir = DIGITAL_NFC_DEP_FRAME_DIR_OUT; + psl_req->cmd = DIGITAL_CMD_PSL_REQ; + psl_req->did = 0; + psl_req->brs = (0x2 << 3) | 0x2; /* 424F both directions */ + psl_req->fsl = DIGITAL_FSL_BITS_PAYLOAD_SIZE_254B; + + digital_skb_push_dep_sod(ddev, skb); + + ddev->skb_add_crc(skb); + + return digital_in_send_cmd(ddev, skb, 500, digital_in_recv_psl_res, + target); +} + static void digital_in_recv_atr_res(struct nfc_digital_dev *ddev, void *arg, struct sk_buff *resp) { @@ -166,6 +260,13 @@ static void digital_in_recv_atr_res(struct nfc_digital_dev *ddev, void *arg, if (rc) goto exit; + if ((ddev->protocols & NFC_PROTO_FELICA_MASK) && + (ddev->curr_rf_tech != NFC_DIGITAL_RF_TECH_424F)) { + rc = digital_in_send_psl_req(ddev, target); + if (!rc) + goto exit; + } + rc = nfc_dep_link_is_up(ddev->nfc_dev, target->idx, NFC_COMM_ACTIVE, NFC_RF_INITIATOR); |