diff mbox series

[v6,8/8] can-dev: add len8_dlc support for various CAN USB adapters

Message ID 20201110101852.1973-9-socketcan@hartkopp.net
State New
Headers show
Series Introduce optional DLC element for Classic CAN | expand

Commit Message

Oliver Hartkopp Nov. 10, 2020, 10:18 a.m. UTC
Support the Classical CAN raw DLC functionality to send and receive DLC
values from 9 .. 15 on various Classical CAN capable USB network drivers:

- gs_usb
- pcan_usb
- pcan_usb_fd
- usb_8dev

Tested-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Oliver Hartkopp <socketcan@hartkopp.net>
---
 drivers/net/can/usb/gs_usb.c               |  7 ++++---
 drivers/net/can/usb/peak_usb/pcan_usb.c    |  8 +++++---
 drivers/net/can/usb/peak_usb/pcan_usb_fd.c | 19 +++++++++++++------
 drivers/net/can/usb/usb_8dev.c             | 10 ++++++----
 4 files changed, 28 insertions(+), 16 deletions(-)
diff mbox series

Patch

diff --git a/drivers/net/can/usb/gs_usb.c b/drivers/net/can/usb/gs_usb.c
index 940589667a7f..bd2c828030e9 100644
--- a/drivers/net/can/usb/gs_usb.c
+++ b/drivers/net/can/usb/gs_usb.c
@@ -329,11 +329,11 @@  static void gs_usb_receive_bulk_callback(struct urb *urb)
 		if (!skb)
 			return;
 
 		cf->can_id = hf->can_id;
 
-		cf->len = can_cc_dlc2len(hf->len);
+		cf->len = can_get_cc_len(dev->can.ctrlmode, cf,	hf->len);
 		memcpy(cf->data, hf->data, 8);
 
 		/* ERROR frames tell us information about the controller */
 		if (hf->can_id & CAN_ERR_FLAG)
 			gs_update_state(dev, cf);
@@ -502,11 +502,12 @@  static netdev_tx_t gs_can_start_xmit(struct sk_buff *skb,
 	hf->channel = dev->channel;
 
 	cf = (struct can_frame *)skb->data;
 
 	hf->can_id = cf->can_id;
-	hf->len = cf->len;
+	hf->len = can_get_cc_dlc(dev->can.ctrlmode, cf);
+
 	memcpy(hf->data, cf->data, cf->len);
 
 	usb_fill_bulk_urb(urb, dev->udev,
 			  usb_sndbulkpipe(dev->udev, GSUSB_ENDPOINT_OUT),
 			  hf,
@@ -856,11 +857,11 @@  static struct gs_can *gs_make_candev(unsigned int channel,
 	dev->can.state = CAN_STATE_STOPPED;
 	dev->can.clock.freq = bt_const->fclk_can;
 	dev->can.bittiming_const = &dev->bt_const;
 	dev->can.do_set_bittiming = gs_usb_set_bittiming;
 
-	dev->can.ctrlmode_supported = 0;
+	dev->can.ctrlmode_supported = CAN_CTRLMODE_CC_LEN8_DLC;
 
 	if (bt_const->feature & GS_CAN_FEATURE_LISTEN_ONLY)
 		dev->can.ctrlmode_supported |= CAN_CTRLMODE_LISTENONLY;
 
 	if (bt_const->feature & GS_CAN_FEATURE_LOOP_BACK)
diff --git a/drivers/net/can/usb/peak_usb/pcan_usb.c b/drivers/net/can/usb/peak_usb/pcan_usb.c
index ec34f87cc02c..a418e43ef59d 100644
--- a/drivers/net/can/usb/peak_usb/pcan_usb.c
+++ b/drivers/net/can/usb/peak_usb/pcan_usb.c
@@ -732,11 +732,11 @@  static int pcan_usb_decode_data(struct pcan_usb_msg_context *mc, u8 status_len)
 		mc->ptr += 2;
 
 		cf->can_id = le16_to_cpu(tmp16) >> 5;
 	}
 
-	cf->len = can_cc_dlc2len(rec_len);
+	cf->len = can_get_cc_len(mc->pdev->dev.can.ctrlmode, cf, rec_len);
 
 	/* Only first packet timestamp is a word */
 	if (pcan_usb_decode_ts(mc, !mc->rec_ts_idx))
 		goto decode_failed;
 
@@ -836,11 +836,12 @@  static int pcan_usb_encode_msg(struct peak_usb_device *dev, struct sk_buff *skb,
 	obuf[1] = 1;
 
 	pc = obuf + PCAN_USB_MSG_HEADER_LEN;
 
 	/* status/len byte */
-	*pc = cf->len;
+	*pc = can_get_cc_dlc(dev->can.ctrlmode, cf);
+
 	if (cf->can_id & CAN_RTR_FLAG)
 		*pc |= PCAN_USB_STATUSLEN_RTR;
 
 	/* can id */
 	if (cf->can_id & CAN_EFF_FLAG) {
@@ -990,11 +991,12 @@  static const struct can_bittiming_const pcan_usb_const = {
 const struct peak_usb_adapter pcan_usb = {
 	.name = "PCAN-USB",
 	.device_id = PCAN_USB_PRODUCT_ID,
 	.ctrl_count = 1,
 	.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
-			      CAN_CTRLMODE_BERR_REPORTING,
+			      CAN_CTRLMODE_BERR_REPORTING |
+			      CAN_CTRLMODE_CC_LEN8_DLC,
 	.clock = {
 		.freq = PCAN_USB_CRYSTAL_HZ / 2 ,
 	},
 	.bittiming_const = &pcan_usb_const,
 
diff --git a/drivers/net/can/usb/peak_usb/pcan_usb_fd.c b/drivers/net/can/usb/peak_usb/pcan_usb_fd.c
index 761e78d8e647..93468106c97b 100644
--- a/drivers/net/can/usb/peak_usb/pcan_usb_fd.c
+++ b/drivers/net/can/usb/peak_usb/pcan_usb_fd.c
@@ -497,11 +497,13 @@  static int pcan_usb_fd_decode_canmsg(struct pcan_usb_fd_if *usb_if,
 		/* CAN 2.0 frame case */
 		skb = alloc_can_skb(netdev, (struct can_frame **)&cfd);
 		if (!skb)
 			return -ENOMEM;
 
-		cfd->len = can_cc_dlc2len(pucan_msg_get_dlc(rm));
+		cfd->len = can_get_cc_len(dev->can.ctrlmode,
+					  (struct can_frame *)cfd,
+					  pucan_msg_get_dlc(rm));
 	}
 
 	cfd->can_id = le32_to_cpu(rm->can_id);
 
 	if (rx_msg_flags & PUCAN_MSG_EXT_ID)
@@ -765,11 +767,12 @@  static int pcan_usb_fd_encode_msg(struct peak_usb_device *dev,
 
 		if (cfd->flags & CANFD_ESI)
 			tx_msg_flags |= PUCAN_MSG_ERROR_STATE_IND;
 	} else {
 		/* CAND 2.0 frames */
-		len = cfd->len;
+		len = can_get_cc_dlc(dev->can.ctrlmode,
+				     (struct can_frame *)cfd);
 
 		if (cfd->can_id & CAN_RTR_FLAG)
 			tx_msg_flags |= PUCAN_MSG_RTR;
 	}
 
@@ -1034,11 +1037,12 @@  static const struct can_bittiming_const pcan_usb_fd_data_const = {
 const struct peak_usb_adapter pcan_usb_fd = {
 	.name = "PCAN-USB FD",
 	.device_id = PCAN_USBFD_PRODUCT_ID,
 	.ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
 	.ctrlmode_supported = CAN_CTRLMODE_FD |
-			CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
+			CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
+			CAN_CTRLMODE_CC_LEN8_DLC,
 	.clock = {
 		.freq = PCAN_UFD_CRYSTAL_HZ,
 	},
 	.bittiming_const = &pcan_usb_fd_const,
 	.data_bittiming_const = &pcan_usb_fd_data_const,
@@ -1106,11 +1110,12 @@  static const struct can_bittiming_const pcan_usb_chip_data_const = {
 const struct peak_usb_adapter pcan_usb_chip = {
 	.name = "PCAN-Chip USB",
 	.device_id = PCAN_USBCHIP_PRODUCT_ID,
 	.ctrl_count = PCAN_USBFD_CHANNEL_COUNT,
 	.ctrlmode_supported = CAN_CTRLMODE_FD |
-		CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
+		CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
+		CAN_CTRLMODE_CC_LEN8_DLC,
 	.clock = {
 		.freq = PCAN_UFD_CRYSTAL_HZ,
 	},
 	.bittiming_const = &pcan_usb_chip_const,
 	.data_bittiming_const = &pcan_usb_chip_data_const,
@@ -1178,11 +1183,12 @@  static const struct can_bittiming_const pcan_usb_pro_fd_data_const = {
 const struct peak_usb_adapter pcan_usb_pro_fd = {
 	.name = "PCAN-USB Pro FD",
 	.device_id = PCAN_USBPROFD_PRODUCT_ID,
 	.ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
 	.ctrlmode_supported = CAN_CTRLMODE_FD |
-			CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
+			CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
+			CAN_CTRLMODE_CC_LEN8_DLC,
 	.clock = {
 		.freq = PCAN_UFD_CRYSTAL_HZ,
 	},
 	.bittiming_const = &pcan_usb_pro_fd_const,
 	.data_bittiming_const = &pcan_usb_pro_fd_data_const,
@@ -1250,11 +1256,12 @@  static const struct can_bittiming_const pcan_usb_x6_data_const = {
 const struct peak_usb_adapter pcan_usb_x6 = {
 	.name = "PCAN-USB X6",
 	.device_id = PCAN_USBX6_PRODUCT_ID,
 	.ctrl_count = PCAN_USBPROFD_CHANNEL_COUNT,
 	.ctrlmode_supported = CAN_CTRLMODE_FD |
-			CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY,
+			CAN_CTRLMODE_3_SAMPLES | CAN_CTRLMODE_LISTENONLY |
+			CAN_CTRLMODE_CC_LEN8_DLC,
 	.clock = {
 		.freq = PCAN_UFD_CRYSTAL_HZ,
 	},
 	.bittiming_const = &pcan_usb_x6_const,
 	.data_bittiming_const = &pcan_usb_x6_data_const,
diff --git a/drivers/net/can/usb/usb_8dev.c b/drivers/net/can/usb/usb_8dev.c
index 6517aaeb4bc0..8078ab44a768 100644
--- a/drivers/net/can/usb/usb_8dev.c
+++ b/drivers/net/can/usb/usb_8dev.c
@@ -468,11 +468,12 @@  static void usb_8dev_rx_can_msg(struct usb_8dev_priv *priv,
 		skb = alloc_can_skb(priv->netdev, &cf);
 		if (!skb)
 			return;
 
 		cf->can_id = be32_to_cpu(msg->id);
-		cf->len = can_cc_dlc2len(msg->dlc & 0xF);
+		cf->len = can_get_cc_len(priv->can.ctrlmode, cf,
+					 msg->dlc & 0xF);
 
 		if (msg->flags & USB_8DEV_EXTID)
 			cf->can_id |= CAN_EFF_FLAG;
 
 		if (msg->flags & USB_8DEV_RTR)
@@ -635,11 +636,11 @@  static netdev_tx_t usb_8dev_start_xmit(struct sk_buff *skb,
 
 	if (cf->can_id & CAN_EFF_FLAG)
 		msg->flags |= USB_8DEV_EXTID;
 
 	msg->id = cpu_to_be32(cf->can_id & CAN_ERR_MASK);
-	msg->dlc = cf->len;
+	msg->dlc = can_get_cc_dlc(priv->can.ctrlmode, cf);
 	memcpy(msg->data, cf->data, cf->len);
 	msg->end = USB_8DEV_DATA_END;
 
 	for (i = 0; i < MAX_TX_URBS; i++) {
 		if (priv->tx_contexts[i].echo_index == MAX_TX_URBS) {
@@ -925,12 +926,13 @@  static int usb_8dev_probe(struct usb_interface *intf,
 	priv->can.clock.freq = USB_8DEV_ABP_CLOCK;
 	priv->can.bittiming_const = &usb_8dev_bittiming_const;
 	priv->can.do_set_mode = usb_8dev_set_mode;
 	priv->can.do_get_berr_counter = usb_8dev_get_berr_counter;
 	priv->can.ctrlmode_supported = CAN_CTRLMODE_LOOPBACK |
-				      CAN_CTRLMODE_LISTENONLY |
-				      CAN_CTRLMODE_ONE_SHOT;
+				       CAN_CTRLMODE_LISTENONLY |
+				       CAN_CTRLMODE_ONE_SHOT |
+				       CAN_CTRLMODE_CC_LEN8_DLC;
 
 	netdev->netdev_ops = &usb_8dev_netdev_ops;
 
 	netdev->flags |= IFF_ECHO; /* we support local echo */