NFC: Add target mode activation netlink event
Userspace gets a netlink event upon target mode activation.
The LLCP layer is also signaled when we get an ATR_REQ in order to get
the remote general bytes.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/nfc/pn533.c b/drivers/nfc/pn533.c
index 605a08a..c6b9bc5 100644
--- a/drivers/nfc/pn533.c
+++ b/drivers/nfc/pn533.c
@@ -260,6 +260,10 @@
#define PN533_INIT_TARGET_PASSIVE 0x1
#define PN533_INIT_TARGET_DEP 0x2
+#define PN533_INIT_TARGET_RESP_FRAME_MASK 0x3
+#define PN533_INIT_TARGET_RESP_ACTIVE 0x1
+#define PN533_INIT_TARGET_RESP_DEP 0x4
+
struct pn533_cmd_init_target {
u8 mode;
u8 mifare[6];
@@ -1128,10 +1132,13 @@
return 0;
}
+#define ATR_REQ_GB_OFFSET 17
static int pn533_init_target_complete(struct pn533 *dev, void *arg,
u8 *params, int params_len)
{
struct pn533_cmd_init_target_response *resp;
+ u8 frame, comm_mode = NFC_COMM_PASSIVE, *gb;
+ size_t gb_len;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
@@ -1143,11 +1150,27 @@
return params_len;
}
+ if (params_len < ATR_REQ_GB_OFFSET + 1)
+ return -EINVAL;
+
resp = (struct pn533_cmd_init_target_response *) params;
- nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x\n", resp->mode);
+ nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x param len %d\n",
+ resp->mode, params_len);
- return 0;
+ frame = resp->mode & PN533_INIT_TARGET_RESP_FRAME_MASK;
+ if (frame == PN533_INIT_TARGET_RESP_ACTIVE)
+ comm_mode = NFC_COMM_ACTIVE;
+
+ /* Again, only DEP */
+ if ((resp->mode & PN533_INIT_TARGET_RESP_DEP) == 0)
+ return -EOPNOTSUPP;
+
+ gb = resp->cmd + ATR_REQ_GB_OFFSET;
+ gb_len = params_len - (ATR_REQ_GB_OFFSET + 1);
+
+ return nfc_tm_activated(dev->nfc_dev, NFC_PROTO_NFC_DEP_MASK,
+ comm_mode, gb, gb_len);
}
static int pn533_init_target(struct nfc_dev *nfc_dev, u32 protocols)