We only want to support p2p target mode for now, no host card emulation.
Signed-off-by: Samuel Ortiz <sameo@xxxxxxxxxxxxxxx>
---
drivers/nfc/pn533.c | 109 ++++++++++++++++++++++++++++++++++++++++++++++++--
1 files changed, 104 insertions(+), 5 deletions(-)
diff --git a/drivers/nfc/pn533.c b/drivers/nfc/pn533.c
index 38a523c..605a08a 100644
--- a/drivers/nfc/pn533.c
+++ b/drivers/nfc/pn533.c
@@ -74,6 +74,8 @@ MODULE_DEVICE_TABLE(usb, pn533_table);
#define PN533_CMD_IN_RELEASE 0x52
#define PN533_CMD_IN_JUMP_FOR_DEP 0x56
+#define PN533_CMD_TG_INIT_AS_TARGET 0x8c
+
#define PN533_CMD_RESPONSE(cmd) (cmd + 1)
/* PN533 Return codes */
@@ -253,6 +255,25 @@ struct pn533_cmd_jump_dep_response {
u8 gt[];
} __packed;
+
+/* PN533_TG_INIT_AS_TARGET */
+#define PN533_INIT_TARGET_PASSIVE 0x1
+#define PN533_INIT_TARGET_DEP 0x2
+
+struct pn533_cmd_init_target {
+ u8 mode;
+ u8 mifare[6];
+ u8 felica[18];
+ u8 nfcid3[10];
+ u8 gb_len;
+ u8 gb[];
+} __packed;
+
+struct pn533_cmd_init_target_response {
+ u8 mode;
+ u8 cmd[];
+} __packed;
+
struct pn533 {
struct usb_device *udev;
struct usb_interface *interface;
@@ -1078,11 +1099,88 @@ stop_poll:
return 0;
}
-static int pn533_init_target(struct nfc_dev *nfc_dev, u32 protocols)
+static int pn533_init_target_frame(struct pn533_frame *frame,
+ u8 *gb, size_t gb_len)
{
+ struct pn533_cmd_init_target *cmd;
+ size_t cmd_len;
+
+ cmd_len = sizeof(struct pn533_cmd_init_target) + gb_len + 1;
+ cmd = kzalloc(cmd_len, GFP_KERNEL);
+ if (cmd == NULL)
+ return -ENOMEM;
+
+ pn533_tx_frame_init(frame, PN533_CMD_TG_INIT_AS_TARGET);
+
+ /* DEP support only */
+ cmd->mode |= PN533_INIT_TARGET_DEP;
+ get_random_bytes(cmd->nfcid3, 10);
+ cmd->gb_len = gb_len;
+ memcpy(cmd->gb, gb, gb_len);
+ /* Len Tk */
+ cmd->gb[gb_len] = 0;
+
+ memcpy(PN533_FRAME_CMD_PARAMS_PTR(frame), cmd, cmd_len);
+ frame->datalen += cmd_len;
+
+ pn533_tx_frame_finish(frame);
+
return 0;
}
+static int pn533_init_target_complete(struct pn533 *dev, void *arg,
+ u8 *params, int params_len)
+{
+ struct pn533_cmd_init_target_response *resp;
+
+ nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
+
+ if (params_len < 0) {
+ nfc_dev_err(&dev->interface->dev,
+ "Error %d when starting as a target",
+ params_len);
+
+ return params_len;
+ }
+
+ resp = (struct pn533_cmd_init_target_response *) params;
+
+ nfc_dev_dbg(&dev->interface->dev, "Target mode 0x%x\n", resp->mode);
+
+ return 0;
+}
+
+static int pn533_init_target(struct nfc_dev *nfc_dev, u32 protocols)
+{
+ struct pn533 *dev = nfc_get_drvdata(nfc_dev);
+ u8 *gb;
+ size_t gb_len;
+ int rc;
+
+ pn533_poll_reset_mod_list(dev);
+
+ gb = nfc_get_local_general_bytes(nfc_dev, &gb_len);
+ if (gb == NULL)
+ return -ENOMEM;
+
+ rc = pn533_init_target_frame(dev->out_frame, gb, gb_len);
+ if (rc < 0)
+ return rc;
+
+ rc = pn533_send_cmd_frame_async(dev, dev->out_frame, dev->in_frame,
+ dev->in_maxlen,
+ pn533_init_target_complete,
+ NULL, GFP_KERNEL);
+
+ if (rc)
+ nfc_dev_err(&dev->interface->dev,
+ "Error %d when trying to initiate as a target", rc);
+
+ dev->poll_mod_count++;
+
+ return rc;
+}
+
static int pn533_start_im_poll(struct nfc_dev *nfc_dev, u32 protocols)
{
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
@@ -1146,12 +1244,13 @@ static int pn533_start_poll(struct nfc_dev *nfc_dev,
return -EBUSY;
}
- if (!tm_protocols)
+ if (im_protocols)
return pn533_start_im_poll(nfc_dev, im_protocols);
- else if (!im_protocols)
+
+ if (tm_protocols)
return pn533_init_target(nfc_dev, tm_protocols);
- else
- return -EINVAL;
+
+ return -EINVAL;
}
static void pn533_stop_poll(struct nfc_dev *nfc_dev)
--
1.7.9.1
--
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