NFC: pn533: Remove pn533_send_cmd_frame_sync

Remove obsolate pn533_send_cmd_frame_sync() and use
previously added new iface for sync send.

The new interface require the use of individual skb for each
cmd which removes some memcpy calls and hides frame logic.
Signed-off-by: Waldemar Rymarkiewicz <waldemar.rymarkiewicz@tieto.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/nfc/pn533.c

@@ -286,11 +286,6 @@ const struct pn533_poll_modulations poll_mod[] = {
 
 /* PN533_CMD_IN_ATR */
 
-struct pn533_cmd_activate_param {
-	u8 tg;
-	u8 next;
-} __packed;
-
 struct pn533_cmd_activate_response {
 	u8 status;
 	u8 nfcid3t[10];
@@ -944,28 +939,10 @@ static int pn533_send_cmd_frame_async(struct pn533 *dev,
 }
 
 struct pn533_sync_cmd_response {
-	int rc;
 	struct sk_buff *resp;
 	struct completion done;
 };
 
-static int pn533_sync_cmd_complete(struct pn533 *dev, void *_arg,
-					u8 *params, int params_len)
-{
-	struct pn533_sync_cmd_response *arg = _arg;
-
-	nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
-
-	arg->rc = 0;
-
-	if (params_len < 0) /* error */
-		arg->rc = params_len;
-
-	complete(&arg->done);
-
-	return 0;
-}
-
 static int pn533_send_sync_complete(struct pn533 *dev, void *_arg,
 				    struct sk_buff *resp)
 {
@@ -1018,28 +995,6 @@ static struct sk_buff *pn533_send_cmd_sync(struct pn533 *dev, u8 cmd_code,
 	return arg.resp;
 }
 
-static int pn533_send_cmd_frame_sync(struct pn533 *dev,
-						struct pn533_frame *out_frame,
-						struct pn533_frame *in_frame,
-						int in_frame_len)
-{
-	int rc;
-	struct pn533_sync_cmd_response arg;
-
-	nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
-
-	init_completion(&arg.done);
-
-	rc = pn533_send_cmd_frame_async(dev, out_frame, in_frame, in_frame_len,
-					pn533_sync_cmd_complete, &arg);
-	if (rc)
-		return rc;
-
-	wait_for_completion(&arg.done);
-
-	return arg.rc;
-}
-
 static void pn533_send_complete(struct urb *urb)
 {
 	struct pn533 *dev = urb->context;
@@ -1801,38 +1756,37 @@ static void pn533_stop_poll(struct nfc_dev *nfc_dev)
 
 static int pn533_activate_target_nfcdep(struct pn533 *dev)
 {
-	struct pn533_cmd_activate_param param;
-	struct pn533_cmd_activate_response *resp;
+	struct pn533_cmd_activate_response *rsp;
 	u16 gt_len;
 	int rc;
 
-	nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
+	struct sk_buff *skb;
+	struct sk_buff *resp;
 
-	pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_ATR);
+	nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
 
-	param.tg = 1;
-	param.next = 0;
-	memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &param,
-				sizeof(struct pn533_cmd_activate_param));
-	dev->out_frame->datalen += sizeof(struct pn533_cmd_activate_param);
+	skb = pn533_alloc_skb(sizeof(u8) * 2); /*TG + Next*/
+	if (!skb)
+		return -ENOMEM;
 
-	pn533_tx_frame_finish(dev->out_frame);
+	*skb_put(skb, sizeof(u8)) = 1; /* TG */
+	*skb_put(skb, sizeof(u8)) = 0; /* Next */
 
-	rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
-				       PN533_NORMAL_FRAME_MAX_LEN);
-	if (rc)
-		return rc;
+	resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_ATR, skb);
+	if (IS_ERR(resp))
+		return PTR_ERR(resp);
 
-	resp = (struct pn533_cmd_activate_response *)
-				PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
-	rc = resp->status & PN533_CMD_RET_MASK;
+	rsp = (struct pn533_cmd_activate_response *) resp->data;
+	rc = rsp->status & PN533_CMD_RET_MASK;
 	if (rc != PN533_CMD_RET_SUCCESS)
+		dev_kfree_skb(resp);
 		return -EIO;
 
 	/* ATR_RES general bytes are located at offset 16 */
-	gt_len = PN533_FRAME_CMD_PARAMS_LEN(dev->in_frame) - 16;
-	rc = nfc_set_remote_general_bytes(dev->nfc_dev, resp->gt, gt_len);
+	gt_len = resp->len - 16;
+	rc = nfc_set_remote_general_bytes(dev->nfc_dev, rsp->gt, gt_len);
 
+	dev_kfree_skb(resp);
 	return rc;
 }
 
@@ -1889,8 +1843,10 @@ static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
 				    struct nfc_target *target)
 {
 	struct pn533 *dev = nfc_get_drvdata(nfc_dev);
-	u8 tg;
-	u8 status;
+
+	struct sk_buff *skb;
+	struct sk_buff *resp;
+
 	int rc;
 
 	nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
@@ -1901,31 +1857,24 @@ static void pn533_deactivate_target(struct nfc_dev *nfc_dev,
 	}
 
 	dev->tgt_active_prot = 0;
-
 	skb_queue_purge(&dev->resp_q);
 
-	pn533_tx_frame_init(dev->out_frame, PN533_CMD_IN_RELEASE);
-
-	tg = 1;
-	memcpy(PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame), &tg, sizeof(u8));
-	dev->out_frame->datalen += sizeof(u8);
+	skb = pn533_alloc_skb(sizeof(u8));
+	if (!skb)
+		return;
 
-	pn533_tx_frame_finish(dev->out_frame);
+	*skb_put(skb, 1) = 1; /* TG*/
 
-	rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
-				       PN533_NORMAL_FRAME_MAX_LEN);
-	if (rc) {
-		nfc_dev_err(&dev->interface->dev, "Error when sending release"
-						" command to the controller");
+	resp = pn533_send_cmd_sync(dev, PN533_CMD_IN_RELEASE, skb);
+	if (IS_ERR(resp))
 		return;
-	}
 
-	status = PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame)[0];
-	rc = status & PN533_CMD_RET_MASK;
+	rc = resp->data[0] & PN533_CMD_RET_MASK;
 	if (rc != PN533_CMD_RET_SUCCESS)
 		nfc_dev_err(&dev->interface->dev, "Error 0x%x when releasing"
 							" the target", rc);
 
+	dev_kfree_skb(resp);
 	return;
 }
 
@@ -2457,43 +2406,71 @@ static void pn533_wq_mi_recv(struct work_struct *work)
 static int pn533_set_configuration(struct pn533 *dev, u8 cfgitem, u8 *cfgdata,
 								u8 cfgdata_len)
 {
-	int rc;
-	u8 *params;
+	struct sk_buff *skb;
+	struct sk_buff *resp;
+
+	int skb_len;
 
 	nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
 
-	pn533_tx_frame_init(dev->out_frame, PN533_CMD_RF_CONFIGURATION);
+	skb_len = sizeof(cfgitem) + cfgdata_len; /* cfgitem + cfgdata */
 
-	params = PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame);
-	params[0] = cfgitem;
-	memcpy(&params[1], cfgdata, cfgdata_len);
-	dev->out_frame->datalen += (1 + cfgdata_len);
+	skb = pn533_alloc_skb(skb_len);
+	if (!skb)
+		return -ENOMEM;
 
-	pn533_tx_frame_finish(dev->out_frame);
+	*skb_put(skb, sizeof(cfgitem)) = cfgitem;
+	memcpy(skb_put(skb, cfgdata_len), cfgdata, cfgdata_len);
 
-	rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
-				       PN533_NORMAL_FRAME_MAX_LEN);
+	resp = pn533_send_cmd_sync(dev, PN533_CMD_RF_CONFIGURATION, skb);
+	if (IS_ERR(resp))
+		return PTR_ERR(resp);
 
-	return rc;
+	dev_kfree_skb(resp);
+	return 0;
+}
+
+static int pn533_get_firmware_version(struct pn533 *dev,
+				      struct pn533_fw_version *fv)
+{
+	struct sk_buff *skb;
+	struct sk_buff *resp;
+
+	skb = pn533_alloc_skb(0);
+	if (!skb)
+		return -ENOMEM;
+
+	resp = pn533_send_cmd_sync(dev, PN533_CMD_GET_FIRMWARE_VERSION, skb);
+	if (IS_ERR(resp))
+		return PTR_ERR(resp);
+
+	fv->ic = resp->data[0];
+	fv->ver = resp->data[1];
+	fv->rev = resp->data[2];
+	fv->support = resp->data[3];
+
+	dev_kfree_skb(resp);
+	return 0;
 }
 
 static int pn533_fw_reset(struct pn533 *dev)
 {
-	int rc;
-	u8 *params;
+	struct sk_buff *skb;
+	struct sk_buff *resp;
 
 	nfc_dev_dbg(&dev->interface->dev, "%s", __func__);
 
-	pn533_tx_frame_init(dev->out_frame, 0x18);
+	skb = pn533_alloc_skb(sizeof(u8));
+	if (!skb)
+		return -ENOMEM;
 
-	params = PN533_FRAME_CMD_PARAMS_PTR(dev->out_frame);
-	params[0] = 0x1;
-	dev->out_frame->datalen += 1;
+	*skb_put(skb, sizeof(u8)) = 0x1;
 
-	pn533_tx_frame_finish(dev->out_frame);
+	resp = pn533_send_cmd_sync(dev, 0x18, skb);
+	if (IS_ERR(resp))
+		return PTR_ERR(resp);
 
-	rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
-				       PN533_NORMAL_FRAME_MAX_LEN);
+	dev_kfree_skb(resp);
 
 	return 0;
 }
@@ -2592,7 +2569,7 @@ static int pn533_setup(struct pn533 *dev)
 static int pn533_probe(struct usb_interface *interface,
 			const struct usb_device_id *id)
 {
-	struct pn533_fw_version *fw_ver;
+	struct pn533_fw_version fw_ver;
 	struct pn533 *dev;
 	struct usb_host_interface *iface_desc;
 	struct usb_endpoint_descriptor *endpoint;
@@ -2664,18 +2641,14 @@ static int pn533_probe(struct usb_interface *interface,
 
 	usb_set_intfdata(interface, dev);
 
-	pn533_tx_frame_init(dev->out_frame, PN533_CMD_GET_FIRMWARE_VERSION);
-	pn533_tx_frame_finish(dev->out_frame);
-
-	rc = pn533_send_cmd_frame_sync(dev, dev->out_frame, dev->in_frame,
-				       PN533_NORMAL_FRAME_MAX_LEN);
-	if (rc)
+	memset(&fw_ver, 0, sizeof(fw_ver));
+	rc = pn533_get_firmware_version(dev, &fw_ver);
+	if (rc < 0)
 		goto destroy_wq;
 
-	fw_ver = (struct pn533_fw_version *)
-				PN533_FRAME_CMD_PARAMS_PTR(dev->in_frame);
-	nfc_dev_info(&dev->interface->dev, "NXP PN533 firmware ver %d.%d now"
-					" attached", fw_ver->ver, fw_ver->rev);
+	nfc_dev_info(&dev->interface->dev,
+		     "NXP PN533 firmware ver %d.%d now attached",
+		     fw_ver.ver, fw_ver.rev);
 
 	dev->device_type = id->driver_info;
 	switch (dev->device_type) {