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path: root/drivers/net/can/usb/mcba_usb.c
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Diffstat (limited to 'drivers/net/can/usb/mcba_usb.c')
-rw-r--r--drivers/net/can/usb/mcba_usb.c78
1 files changed, 42 insertions, 36 deletions
diff --git a/drivers/net/can/usb/mcba_usb.c b/drivers/net/can/usb/mcba_usb.c
index a45865bd7254..41c0a1c399bf 100644
--- a/drivers/net/can/usb/mcba_usb.c
+++ b/drivers/net/can/usb/mcba_usb.c
@@ -6,11 +6,11 @@
* This driver is inspired by the 4.6.2 version of net/can/usb/usb_8dev.c
*/
-#include <asm/unaligned.h>
+#include <linux/unaligned.h>
#include <linux/can.h>
#include <linux/can/dev.h>
#include <linux/can/error.h>
-#include <linux/can/led.h>
+#include <linux/ethtool.h>
#include <linux/module.h>
#include <linux/netdevice.h>
#include <linux/signal.h>
@@ -33,10 +33,6 @@
#define MCBA_USB_RX_BUFF_SIZE 64
#define MCBA_USB_TX_BUFF_SIZE (sizeof(struct mcba_usb_msg))
-/* MCBA endpoint numbers */
-#define MCBA_USB_EP_IN 1
-#define MCBA_USB_EP_OUT 1
-
/* Microchip command id */
#define MBCA_CMD_RECEIVE_MESSAGE 0xE3
#define MBCA_CMD_I_AM_ALIVE_FROM_CAN 0xF5
@@ -51,6 +47,10 @@
#define MCBA_VER_REQ_USB 1
#define MCBA_VER_REQ_CAN 2
+/* Drive the CAN_RES signal LOW "0" to activate R24 and R25 */
+#define MCBA_VER_TERMINATION_ON 0
+#define MCBA_VER_TERMINATION_OFF 1
+
#define MCBA_SIDL_EXID_MASK 0x8
#define MCBA_DLC_MASK 0xf
#define MCBA_DLC_RTR_MASK 0x40
@@ -64,7 +64,6 @@
struct mcba_usb_ctx {
struct mcba_priv *priv;
u32 ndx;
- u8 dlc;
bool can;
};
@@ -84,6 +83,8 @@ struct mcba_priv {
atomic_t free_ctx_cnt;
void *rxbuf[MCBA_MAX_RX_URBS];
dma_addr_t rxbuf_dma[MCBA_MAX_RX_URBS];
+ int rx_pipe;
+ int tx_pipe;
};
/* CAN frame */
@@ -184,13 +185,10 @@ static inline struct mcba_usb_ctx *mcba_usb_get_free_ctx(struct mcba_priv *priv,
ctx = &priv->tx_context[i];
ctx->ndx = i;
- if (cf) {
+ if (cf)
ctx->can = true;
- ctx->dlc = cf->len;
- } else {
+ else
ctx->can = false;
- ctx->dlc = 0;
- }
atomic_dec(&priv->free_ctx_cnt);
break;
@@ -236,10 +234,8 @@ static void mcba_usb_write_bulk_callback(struct urb *urb)
return;
netdev->stats.tx_packets++;
- netdev->stats.tx_bytes += ctx->dlc;
-
- can_led_event(netdev, CAN_LED_EVENT_TX);
- can_get_echo_skb(netdev, ctx->ndx, NULL);
+ netdev->stats.tx_bytes += can_get_echo_skb(netdev, ctx->ndx,
+ NULL);
}
if (urb->status)
@@ -272,10 +268,8 @@ static netdev_tx_t mcba_usb_xmit(struct mcba_priv *priv,
memcpy(buf, usb_msg, MCBA_USB_TX_BUFF_SIZE);
- usb_fill_bulk_urb(urb, priv->udev,
- usb_sndbulkpipe(priv->udev, MCBA_USB_EP_OUT), buf,
- MCBA_USB_TX_BUFF_SIZE, mcba_usb_write_bulk_callback,
- ctx);
+ usb_fill_bulk_urb(urb, priv->udev, priv->tx_pipe, buf, MCBA_USB_TX_BUFF_SIZE,
+ mcba_usb_write_bulk_callback, ctx);
urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
usb_anchor_urb(urb, &priv->tx_submitted);
@@ -321,7 +315,7 @@ static netdev_tx_t mcba_usb_start_xmit(struct sk_buff *skb,
.cmd_id = MBCA_CMD_TRANSMIT_MESSAGE_EV
};
- if (can_dropped_invalid_skb(netdev, skb))
+ if (can_dev_dropped_skb(netdev, skb))
return NETDEV_TX_OK;
ctx = mcba_usb_get_free_ctx(priv, cf);
@@ -368,7 +362,6 @@ static netdev_tx_t mcba_usb_start_xmit(struct sk_buff *skb,
xmit_failed:
can_free_echo_skb(priv->netdev, ctx->ndx, NULL);
mcba_usb_free_ctx(ctx);
- dev_kfree_skb(skb);
stats->tx_dropped++;
return NETDEV_TX_OK;
@@ -450,17 +443,17 @@ static void mcba_usb_process_can(struct mcba_priv *priv,
cf->can_id = (sid & 0xffe0) >> 5;
}
- if (msg->dlc & MCBA_DLC_RTR_MASK)
- cf->can_id |= CAN_RTR_FLAG;
-
cf->len = can_cc_dlc2len(msg->dlc & MCBA_DLC_MASK);
- memcpy(cf->data, msg->data, cf->len);
+ if (msg->dlc & MCBA_DLC_RTR_MASK) {
+ cf->can_id |= CAN_RTR_FLAG;
+ } else {
+ memcpy(cf->data, msg->data, cf->len);
+ stats->rx_bytes += cf->len;
+ }
stats->rx_packets++;
- stats->rx_bytes += cf->len;
- can_led_event(priv->netdev, CAN_LED_EVENT_RX);
netif_rx(skb);
}
@@ -474,7 +467,7 @@ static void mcba_usb_process_ka_usb(struct mcba_priv *priv,
priv->usb_ka_first_pass = false;
}
- if (msg->termination_state)
+ if (msg->termination_state == MCBA_VER_TERMINATION_ON)
priv->can.termination = MCBA_TERMINATION_ENABLED;
else
priv->can.termination = MCBA_TERMINATION_DISABLED;
@@ -611,7 +604,7 @@ static void mcba_usb_read_bulk_callback(struct urb *urb)
resubmit_urb:
usb_fill_bulk_urb(urb, priv->udev,
- usb_rcvbulkpipe(priv->udev, MCBA_USB_EP_OUT),
+ priv->rx_pipe,
urb->transfer_buffer, MCBA_USB_RX_BUFF_SIZE,
mcba_usb_read_bulk_callback, priv);
@@ -653,8 +646,10 @@ static int mcba_usb_start(struct mcba_priv *priv)
break;
}
+ urb->transfer_dma = buf_dma;
+
usb_fill_bulk_urb(urb, priv->udev,
- usb_rcvbulkpipe(priv->udev, MCBA_USB_EP_IN),
+ priv->rx_pipe,
buf, MCBA_USB_RX_BUFF_SIZE,
mcba_usb_read_bulk_callback, priv);
urb->transfer_flags |= URB_NO_TRANSFER_DMA_MAP;
@@ -706,7 +701,6 @@ static int mcba_usb_open(struct net_device *netdev)
priv->can_speed_check = true;
priv->can.state = CAN_STATE_ERROR_ACTIVE;
- can_led_event(netdev, CAN_LED_EVENT_OPEN);
netif_start_queue(netdev);
return 0;
@@ -738,7 +732,6 @@ static int mcba_usb_close(struct net_device *netdev)
mcba_urb_unlink(priv);
close_candev(netdev);
- can_led_event(netdev, CAN_LED_EVENT_STOP);
return 0;
}
@@ -770,6 +763,10 @@ static const struct net_device_ops mcba_netdev_ops = {
.ndo_start_xmit = mcba_usb_start_xmit,
};
+static const struct ethtool_ops mcba_ethtool_ops = {
+ .get_ts_info = ethtool_op_get_ts_info,
+};
+
/* Microchip CANBUS has hardcoded bittiming values by default.
* This function sends request via USB to change the speed and align bittiming
* values for presentation purposes only
@@ -792,9 +789,9 @@ static int mcba_set_termination(struct net_device *netdev, u16 term)
};
if (term == MCBA_TERMINATION_ENABLED)
- usb_msg.termination = 1;
+ usb_msg.termination = MCBA_VER_TERMINATION_ON;
else
- usb_msg.termination = 0;
+ usb_msg.termination = MCBA_VER_TERMINATION_OFF;
mcba_usb_xmit_cmd(priv, (struct mcba_usb_msg *)&usb_msg);
@@ -808,6 +805,13 @@ static int mcba_usb_probe(struct usb_interface *intf,
struct mcba_priv *priv;
int err;
struct usb_device *usbdev = interface_to_usbdev(intf);
+ struct usb_endpoint_descriptor *in, *out;
+
+ err = usb_find_common_endpoints(intf->cur_altsetting, &in, &out, NULL, NULL);
+ if (err) {
+ dev_err(&intf->dev, "Can't find endpoints\n");
+ return err;
+ }
netdev = alloc_candev(sizeof(struct mcba_priv), MCBA_MAX_TX_URBS);
if (!netdev) {
@@ -841,6 +845,7 @@ static int mcba_usb_probe(struct usb_interface *intf,
priv->can.do_set_bittiming = mcba_net_set_bittiming;
netdev->netdev_ops = &mcba_netdev_ops;
+ netdev->ethtool_ops = &mcba_ethtool_ops;
netdev->flags |= IFF_ECHO; /* we support local echo */
@@ -853,7 +858,8 @@ static int mcba_usb_probe(struct usb_interface *intf,
goto cleanup_free_candev;
}
- devm_can_led_init(netdev);
+ priv->rx_pipe = usb_rcvbulkpipe(priv->udev, in->bEndpointAddress);
+ priv->tx_pipe = usb_sndbulkpipe(priv->udev, out->bEndpointAddress);
/* Start USB dev only if we have successfully registered CAN device */
err = mcba_usb_start(priv);
generated by cgit (git 2.34.1) at 2025-12-24 18:30:48 +0000