From 8c0695e4998dd268ff2a05951961247b7e015651 Mon Sep 17 00:00:00 2001 From: Thierry Escande Date: Thu, 19 Sep 2013 17:55:28 +0200 Subject: NFC Digital: Add NFC-F technology support This adds polling support for NFC-F technology at 212 kbits/s and 424 kbits/s. A user space application like neard can send type 3 tag commands through the NFC core. Process flow for NFC-F detection is as follow: 1 - The digital stack sends the SENSF_REQ command to the NFC device. 2 - A peer device replies with a SENSF_RES response. 3 - The digital stack notifies the NFC core of the presence of a target in the operation field and passes the target NFCID2. This also adds support for CRC calculation of type CRC-F. The CRC calculation is handled by the digital stack if the NFC device doesn't support it. Signed-off-by: Thierry Escande Signed-off-by: Samuel Ortiz --- net/nfc/digital_core.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) (limited to 'net/nfc/digital_core.c') diff --git a/net/nfc/digital_core.c b/net/nfc/digital_core.c index 4b3ceb45834b..25e5bcb946e0 100644 --- a/net/nfc/digital_core.c +++ b/net/nfc/digital_core.c @@ -20,6 +20,8 @@ #define DIGITAL_PROTO_NFCA_RF_TECH \ (NFC_PROTO_JEWEL_MASK | NFC_PROTO_MIFARE_MASK) +#define DIGITAL_PROTO_NFCF_RF_TECH (NFC_PROTO_FELICA_MASK) + struct digital_cmd { struct list_head queue; @@ -252,6 +254,12 @@ int digital_target_found(struct nfc_digital_dev *ddev, add_crc = digital_skb_add_crc_a; break; + case NFC_PROTO_FELICA: + framing = NFC_DIGITAL_FRAMING_NFCF_T3T; + check_crc = digital_skb_check_crc_f; + add_crc = digital_skb_add_crc_f; + break; + default: PR_ERR("Invalid protocol %d", protocol); return -EINVAL; @@ -383,6 +391,14 @@ static int digital_start_poll(struct nfc_dev *nfc_dev, __u32 im_protocols, digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_106A, digital_in_send_sens_req); + if (im_protocols & DIGITAL_PROTO_NFCF_RF_TECH) { + digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_212F, + digital_in_send_sensf_req); + + digital_add_poll_tech(ddev, NFC_DIGITAL_RF_TECH_424F, + digital_in_send_sensf_req); + } + if (!ddev->poll_tech_count) { PR_ERR("Unsupported protocols: im=0x%x, tm=0x%x", matching_im_protocols, matching_tm_protocols); @@ -560,6 +576,8 @@ struct nfc_digital_dev *nfc_digital_allocate_device(struct nfc_digital_ops *ops, ddev->protocols |= NFC_PROTO_JEWEL_MASK; if (supported_protocols & NFC_PROTO_MIFARE_MASK) ddev->protocols |= NFC_PROTO_MIFARE_MASK; + if (supported_protocols & NFC_PROTO_FELICA_MASK) + ddev->protocols |= NFC_PROTO_FELICA_MASK; ddev->tx_headroom = tx_headroom + DIGITAL_MAX_HEADER_LEN; ddev->tx_tailroom = tx_tailroom + DIGITAL_CRC_LEN; -- cgit v1.2.3