NFC: Add passive initiator data for pn533
When trying to enable a DEP link as a passive initiator, pn533 needs to
provide the polling request command payload.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/nfc/pn533.c b/drivers/nfc/pn533.c
index d976344..806ab3d 100644
--- a/drivers/nfc/pn533.c
+++ b/drivers/nfc/pn533.c
@@ -256,7 +256,7 @@
u8 active;
u8 baud;
u8 next;
- u8 gt[];
+ u8 data[];
} __packed;
struct pn533_cmd_jump_dep_response {
@@ -1582,12 +1582,14 @@
return 0;
}
+#define PASSIVE_DATA_LEN 5
static int pn533_dep_link_up(struct nfc_dev *nfc_dev, struct nfc_target *target,
u8 comm_mode, u8* gb, size_t gb_len)
{
struct pn533 *dev = nfc_get_drvdata(nfc_dev);
struct pn533_cmd_jump_dep *cmd;
- u8 cmd_len;
+ u8 cmd_len, *data_ptr;
+ u8 passive_data[PASSIVE_DATA_LEN] = {0x00, 0xff, 0xff, 0x00, 0x3};
int rc;
nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
@@ -1605,6 +1607,9 @@
}
cmd_len = sizeof(struct pn533_cmd_jump_dep) + gb_len;
+ if (comm_mode == NFC_COMM_PASSIVE)
+ cmd_len += PASSIVE_DATA_LEN;
+
cmd = kzalloc(cmd_len, GFP_KERNEL);
if (cmd == NULL)
return -ENOMEM;
@@ -1612,10 +1617,18 @@
pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_JUMP_FOR_DEP);
cmd->active = !comm_mode;
- cmd->baud = 0;
+ cmd->next = 0;
+ cmd->baud = 2;
+ data_ptr = cmd->data;
+ if (comm_mode == NFC_COMM_PASSIVE && cmd->baud > 0) {
+ memcpy(data_ptr, passive_data, PASSIVE_DATA_LEN);
+ cmd->next |= 1;
+ data_ptr += PASSIVE_DATA_LEN;
+ }
+
if (gb != NULL && gb_len > 0) {
- cmd->next = 4; /* We have some Gi */
- memcpy(cmd->gt, gb, gb_len);
+ cmd->next |= 4; /* We have some Gi */
+ memcpy(data_ptr, gb, gb_len);
} else {
cmd->next = 0;
}