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Commit 15461aeb authored by Waldemar Rymarkiewicz's avatar Waldemar Rymarkiewicz Committed by Samuel Ortiz
Browse files

NFC: pn533: Add a new pn533_send_data_async iface 



This iface is intended to be used with DEP transfers. It differs
from pn533_send_cmd_async() in the way the response skb is allocated.

Signed-off-by: default avatarWaldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent aada17ac

drivers/nfc/pn533.c

+31 −0
Original line number Diff line number Diff line
@@ -86,6 +86,12 @@ MODULE_DEVICE_TABLE(usb, pn533_table); 
					+ 2) /* data[0] TFI, data[1] CC */

#define PN533_FRAME_TAIL_LEN 2 /* data[len] DCS, data[len + 1] postamble*/



/*

 * Max extended frame payload len, excluding TFI and CC

 * which are already in PN533_FRAME_HEADER_LEN.

 */

#define PN533_FRAME_MAX_PAYLOAD_LEN 263



#define PN533_FRAME_SIZE(f) (sizeof(struct pn533_frame) + f->datalen + \

				PN533_FRAME_TAIL_LEN)

#define PN533_FRAME_ACK_SIZE (sizeof(struct pn533_frame) + 1)
@@ -807,6 +813,31 @@ unlock: 
	return rc;

}



static int pn533_send_data_async(struct pn533 *dev, u8 cmd_code,

				 struct sk_buff *req,

				 pn533_send_async_complete_t complete_cb,

				 void *complete_cb_context)

{

	struct sk_buff *resp;

	int rc;

	int  resp_len = PN533_FRAME_HEADER_LEN +

			PN533_FRAME_MAX_PAYLOAD_LEN +

			PN533_FRAME_TAIL_LEN;



	nfc_dev_dbg(&dev->interface->dev, "%s", __func__);



	resp = nfc_alloc_recv_skb(resp_len, GFP_KERNEL);

	if (!resp)

		return -ENOMEM;



	rc = __pn533_send_async(dev, cmd_code, req, resp, resp_len, complete_cb,

				complete_cb_context);

	if (rc)

		dev_kfree_skb(resp);



	return rc;

}



static int pn533_send_cmd_async(struct pn533 *dev, u8 cmd_code,

				struct sk_buff *req,

				pn533_send_async_complete_t complete_cb,