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NFC: pn533: Add a new pn533_send_data_async iface

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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: Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
This commit is contained in:
Waldemar Rymarkiewicz 2012-11-26 14:18:35 +01:00 committed by Samuel Ortiz
parent aada17ac70
commit 15461aeb53
1 changed files with 31 additions and 0 deletions
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31
drivers/nfc/pn533.c
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@ -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 @@ static int __pn533_send_async(struct pn533 *dev, u8 cmd_code,
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,