diff options
| -rw-r--r-- | drivers/nfc/pn533.c | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/drivers/nfc/pn533.c b/drivers/nfc/pn533.c index 89f747479a4f..0e9bf9dfbbb5 100644 --- a/drivers/nfc/pn533.c +++ b/drivers/nfc/pn533.c @@ -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, |