NFC: Set and get DEP general bytes
Without an API for setting and getting the local and remote general bytes, drivers won't be able to properly establish a DEP link. This API also allows them to propagate the remote general bytes they get from the DEP link establishment up to the LLCP layer. Signed-off-by: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
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@ -1121,6 +1121,7 @@ static int pn533_activate_target_nfcdep(struct pn533 *dev)
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{
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struct pn533_cmd_activate_param param;
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struct pn533_cmd_activate_response *resp;
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u16 gt_len;
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int rc;
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nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
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@ -1146,7 +1147,11 @@ static int pn533_activate_target_nfcdep(struct pn533 *dev)
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if (rc != PN533_CMD_RET_SUCCESS)
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return -EIO;
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return 0;
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/* ATR_RES general bytes are located at offset 16 */
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gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 16;
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rc = nfc_set_remote_general_bytes(dev->nfc_dev, resp->gt, gt_len);
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return rc;
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}
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static int pn533_activate_target(struct nfc_dev *nfc_dev, u32 target_idx,
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@ -170,6 +170,11 @@ struct sk_buff *nfc_alloc_send_skb(struct nfc_dev *dev, struct sock *sk,
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unsigned int *err);
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struct sk_buff *nfc_alloc_recv_skb(unsigned int size, gfp_t gfp);
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int nfc_set_remote_general_bytes(struct nfc_dev *dev,
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u8 *gt, u8 gt_len);
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u8 *nfc_get_local_general_bytes(struct nfc_dev *dev, u8 *gt_len);
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int nfc_targets_found(struct nfc_dev *dev, struct nfc_target *targets,
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int ntargets);
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@ -352,6 +352,24 @@ error:
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return rc;
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}
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int nfc_set_remote_general_bytes(struct nfc_dev *dev, u8 *gb, u8 gb_len)
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{
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pr_debug("dev_name=%s gb_len=%d\n",
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dev_name(&dev->dev), gb_len);
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if (gb_len > NFC_MAX_GT_LEN)
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return -EINVAL;
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return 0;
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}
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EXPORT_SYMBOL(nfc_set_remote_general_bytes);
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u8 *nfc_get_local_general_bytes(struct nfc_dev *dev, u8 *gt_len)
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{
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return NULL;
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}
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EXPORT_SYMBOL(nfc_get_local_general_bytes);
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/**
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* nfc_alloc_send_skb - allocate a skb for data exchange responses
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*
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