Merge tag 'linux-can-next-for-6.12-20240806' of...

Merge tag 'linux-can-next-for-6.12-20240806' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next

Marc Kleine-Budde says:

====================
pull-request: can-next 2024-08-06

The first patch is by Frank Li and adds the can-transceiver property
to the flexcan device-tree bindings.

Haibo Chen contributes 2 patches for the flexcan driver to add wakeup
support for the imx95.

The 2 patches by Stefan Mätje for the esd_402_pci driver clean up the
driver and add support for the one-shot mode.

The last 15 patches are by Jimmy Assarsson and add hardware timestamp
support for all devices covered by the kvaser_usb driver.

* tag 'linux-can-next-for-6.12-20240806' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next:
  can: kvaser_usb: Rename kvaser_usb_{ethtool,netdev}_ops_hwts to kvaser_usb_{ethtool,netdev}_ops
  can: kvaser_usb: Remove struct variables kvaser_usb_{ethtool,netdev}_ops
  can: kvaser_usb: Remove KVASER_USB_QUIRK_HAS_HARDWARE_TIMESTAMP
  can: kvaser_usb: leaf: Add hardware timestamp support to usbcan devices
  can: kvaser_usb: leaf: Store MSB of timestamp
  can: kvaser_usb: leaf: Add structs for Tx ACK and clock overflow commands
  can: kvaser_usb: leaf: Add hardware timestamp support to leaf based devices
  can: kvaser_usb: leaf: kvaser_usb_leaf_tx_acknowledge: Rename local variable
  can: kvaser_usb: leaf: Replace kvaser_usb_leaf_m32c_dev_cfg with kvaser_usb_leaf_m32c_dev_cfg_{16,24,32}mhz
  can: kvaser_usb: leaf: Assign correct timestamp_freq for kvaser_usb_leaf_imx_dev_cfg_{16,24,32}mhz
  can: kvaser_usb: leaf: Add struct for Tx ACK commands
  can: kvaser_usb: hydra: Set hardware timestamp on transmitted packets
  can: kvaser_usb: hydra: Add struct for Tx ACK commands
  can: kvaser_usb: hydra: kvaser_usb_hydra_ktime_from_rx_cmd: Drop {rx_} in function name
  can: kvaser_usb: Add helper functions to convert device timestamp into ktime
  can: esd_402_pci: Add support for one-shot mode
  can: esd_402_pci: Rename esdACC CTRL register macros
  can: flexcan: add wakeup support for imx95
  dt-bindings: can: fsl,flexcan: move fsl,imx95-flexcan standalone
  dt-bindings: can: fsl,flexcan: add common 'can-transceiver' for fsl,flexcan
====================

Link: https://patch.msgid.link/20240806074731.1905378-1-mkl@pengutronix.deSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/devicetree/bindings/net/can/fsl,flexcan.yaml

@@ -17,6 +17,7 @@ properties:
   compatible:
     oneOf:
       - enum:
+          - fsl,imx95-flexcan
           - fsl,imx93-flexcan
           - fsl,imx8qm-flexcan
           - fsl,imx8mp-flexcan
@@ -38,9 +39,6 @@ properties:
               - fsl,imx6ul-flexcan
               - fsl,imx6sx-flexcan
           - const: fsl,imx6q-flexcan
-      - items:
-          - const: fsl,imx95-flexcan
-          - const: fsl,imx93-flexcan
       - items:
           - enum:
               - fsl,ls1028ar1-flexcan
@@ -80,6 +78,10 @@ properties:
       node then controller is assumed to be little endian. If this property is
       present then controller is assumed to be big endian.
 
+  can-transceiver:
+    $ref: can-transceiver.yaml#
+    unevaluatedProperties: false
+
   fsl,stop-mode:
     description: |
       Register bits of stop mode control.

drivers/net/can/esd/esd_402_pci-core.c

@@ -369,12 +369,13 @@ static int pci402_init_cores(struct pci_dev *pdev)
 		SET_NETDEV_DEV(netdev, &pdev->dev);
 
 		priv = netdev_priv(netdev);
+		priv->can.clock.freq = card->ov.core_frequency;
 		priv->can.ctrlmode_supported = CAN_CTRLMODE_LOOPBACK |
 			CAN_CTRLMODE_LISTENONLY |
 			CAN_CTRLMODE_BERR_REPORTING |
 			CAN_CTRLMODE_CC_LEN8_DLC;
-
-		priv->can.clock.freq = card->ov.core_frequency;
+		if (card->ov.features & ACC_OV_REG_FEAT_MASK_DAR)
+			priv->can.ctrlmode_supported |= CAN_CTRLMODE_ONE_SHOT;
 		if (card->ov.features & ACC_OV_REG_FEAT_MASK_CANFD)
 			priv->can.bittiming_const = &pci402_bittiming_const_canfd;
 		else

drivers/net/can/esd/esdacc.c

@@ -17,6 +17,9 @@
 /* esdACC DLC register layout */
 #define ACC_DLC_DLC_MASK GENMASK(3, 0)
 #define ACC_DLC_RTR_FLAG BIT(4)
+#define ACC_DLC_SSTX_FLAG BIT(24)	/* Single Shot TX */
+
+/* esdACC DLC in struct acc_bmmsg_rxtxdone::acc_dlc.len only! */
 #define ACC_DLC_TXD_FLAG BIT(5)
 
 /* ecc value of esdACC equals SJA1000's ECC register */
@@ -43,8 +46,8 @@
 
 static void acc_resetmode_enter(struct acc_core *core)
 {
-	acc_set_bits(core, ACC_CORE_OF_CTRL_MODE,
-		     ACC_REG_CONTROL_MASK_MODE_RESETMODE);
+	acc_set_bits(core, ACC_CORE_OF_CTRL,
+		     ACC_REG_CTRL_MASK_RESETMODE);
 
 	/* Read back reset mode bit to flush PCI write posting */
 	acc_resetmode_entered(core);
@@ -52,14 +55,14 @@ static void acc_resetmode_enter(struct acc_core *core)
 
 static void acc_resetmode_leave(struct acc_core *core)
 {
-	acc_clear_bits(core, ACC_CORE_OF_CTRL_MODE,
-		       ACC_REG_CONTROL_MASK_MODE_RESETMODE);
+	acc_clear_bits(core, ACC_CORE_OF_CTRL,
+		       ACC_REG_CTRL_MASK_RESETMODE);
 
 	/* Read back reset mode bit to flush PCI write posting */
 	acc_resetmode_entered(core);
 }
 
-static void acc_txq_put(struct acc_core *core, u32 acc_id, u8 acc_dlc,
+static void acc_txq_put(struct acc_core *core, u32 acc_id, u32 acc_dlc,
 			const void *data)
 {
 	acc_write32_noswap(core, ACC_CORE_OF_TXFIFO_DATA_1,
@@ -172,7 +175,7 @@ int acc_open(struct net_device *netdev)
 	struct acc_net_priv *priv = netdev_priv(netdev);
 	struct acc_core *core = priv->core;
 	u32 tx_fifo_status;
-	u32 ctrl_mode;
+	u32 ctrl;
 	int err;
 
 	/* Retry to enter RESET mode if out of sync. */
@@ -187,19 +190,19 @@ int acc_open(struct net_device *netdev)
 	if (err)
 		return err;
 
-	ctrl_mode = ACC_REG_CONTROL_MASK_IE_RXTX |
-			ACC_REG_CONTROL_MASK_IE_TXERROR |
-			ACC_REG_CONTROL_MASK_IE_ERRWARN |
-			ACC_REG_CONTROL_MASK_IE_OVERRUN |
-			ACC_REG_CONTROL_MASK_IE_ERRPASS;
+	ctrl = ACC_REG_CTRL_MASK_IE_RXTX |
+		ACC_REG_CTRL_MASK_IE_TXERROR |
+		ACC_REG_CTRL_MASK_IE_ERRWARN |
+		ACC_REG_CTRL_MASK_IE_OVERRUN |
+		ACC_REG_CTRL_MASK_IE_ERRPASS;
 
 	if (priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING)
-		ctrl_mode |= ACC_REG_CONTROL_MASK_IE_BUSERR;
+		ctrl |= ACC_REG_CTRL_MASK_IE_BUSERR;
 
 	if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY)
-		ctrl_mode |= ACC_REG_CONTROL_MASK_MODE_LOM;
+		ctrl |= ACC_REG_CTRL_MASK_LOM;
 
-	acc_set_bits(core, ACC_CORE_OF_CTRL_MODE, ctrl_mode);
+	acc_set_bits(core, ACC_CORE_OF_CTRL, ctrl);
 
 	acc_resetmode_leave(core);
 	priv->can.state = CAN_STATE_ERROR_ACTIVE;
@@ -218,13 +221,13 @@ int acc_close(struct net_device *netdev)
 	struct acc_net_priv *priv = netdev_priv(netdev);
 	struct acc_core *core = priv->core;
 
-	acc_clear_bits(core, ACC_CORE_OF_CTRL_MODE,
-		       ACC_REG_CONTROL_MASK_IE_RXTX |
-		       ACC_REG_CONTROL_MASK_IE_TXERROR |
-		       ACC_REG_CONTROL_MASK_IE_ERRWARN |
-		       ACC_REG_CONTROL_MASK_IE_OVERRUN |
-		       ACC_REG_CONTROL_MASK_IE_ERRPASS |
-		       ACC_REG_CONTROL_MASK_IE_BUSERR);
+	acc_clear_bits(core, ACC_CORE_OF_CTRL,
+		       ACC_REG_CTRL_MASK_IE_RXTX |
+		       ACC_REG_CTRL_MASK_IE_TXERROR |
+		       ACC_REG_CTRL_MASK_IE_ERRWARN |
+		       ACC_REG_CTRL_MASK_IE_OVERRUN |
+		       ACC_REG_CTRL_MASK_IE_ERRPASS |
+		       ACC_REG_CTRL_MASK_IE_BUSERR);
 
 	netif_stop_queue(netdev);
 	acc_resetmode_enter(core);
@@ -233,9 +236,9 @@ int acc_close(struct net_device *netdev)
 	/* Mark pending TX requests to be aborted after controller restart. */
 	acc_write32(core, ACC_CORE_OF_TX_ABORT_MASK, 0xffff);
 
-	/* ACC_REG_CONTROL_MASK_MODE_LOM is only accessible in RESET mode */
-	acc_clear_bits(core, ACC_CORE_OF_CTRL_MODE,
-		       ACC_REG_CONTROL_MASK_MODE_LOM);
+	/* ACC_REG_CTRL_MASK_LOM is only accessible in RESET mode */
+	acc_clear_bits(core, ACC_CORE_OF_CTRL,
+		       ACC_REG_CTRL_MASK_LOM);
 
 	close_candev(netdev);
 	return 0;
@@ -249,7 +252,7 @@ netdev_tx_t acc_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 	u8 tx_fifo_head = core->tx_fifo_head;
 	int fifo_usage;
 	u32 acc_id;
-	u8 acc_dlc;
+	u32 acc_dlc;
 
 	if (can_dropped_invalid_skb(netdev, skb))
 		return NETDEV_TX_OK;
@@ -274,6 +277,8 @@ netdev_tx_t acc_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 	acc_dlc = can_get_cc_dlc(cf, priv->can.ctrlmode);
 	if (cf->can_id & CAN_RTR_FLAG)
 		acc_dlc |= ACC_DLC_RTR_FLAG;
+	if (priv->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT)
+		acc_dlc |= ACC_DLC_SSTX_FLAG;
 
 	if (cf->can_id & CAN_EFF_FLAG) {
 		acc_id = cf->can_id & CAN_EFF_MASK;

drivers/net/can/esd/esdacc.h

@@ -35,6 +35,7 @@
  */
 #define ACC_OV_REG_FEAT_MASK_CANFD BIT(27 - 16)
 #define ACC_OV_REG_FEAT_MASK_NEW_PSC BIT(28 - 16)
+#define ACC_OV_REG_FEAT_MASK_DAR BIT(30 - 16)
 
 #define ACC_OV_REG_MODE_MASK_ENDIAN_LITTLE BIT(0)
 #define ACC_OV_REG_MODE_MASK_BM_ENABLE BIT(1)
@@ -50,7 +51,7 @@
 #define ACC_OV_REG_MODE_MASK_FPGA_RESET BIT(31)
 
 /* esdACC CAN Core Module */
-#define ACC_CORE_OF_CTRL_MODE 0x0000
+#define ACC_CORE_OF_CTRL 0x0000
 #define ACC_CORE_OF_STATUS_IRQ 0x0008
 #define ACC_CORE_OF_BRP	0x000c
 #define ACC_CORE_OF_BTR	0x0010
@@ -66,21 +67,22 @@
 #define ACC_CORE_OF_TXFIFO_DATA_0 0x00c8
 #define ACC_CORE_OF_TXFIFO_DATA_1 0x00cc
 
-#define ACC_REG_CONTROL_MASK_MODE_RESETMODE BIT(0)
-#define ACC_REG_CONTROL_MASK_MODE_LOM BIT(1)
-#define ACC_REG_CONTROL_MASK_MODE_STM BIT(2)
-#define ACC_REG_CONTROL_MASK_MODE_TRANSEN BIT(5)
-#define ACC_REG_CONTROL_MASK_MODE_TS BIT(6)
-#define ACC_REG_CONTROL_MASK_MODE_SCHEDULE BIT(7)
-
-#define ACC_REG_CONTROL_MASK_IE_RXTX BIT(8)
-#define ACC_REG_CONTROL_MASK_IE_TXERROR BIT(9)
-#define ACC_REG_CONTROL_MASK_IE_ERRWARN BIT(10)
-#define ACC_REG_CONTROL_MASK_IE_OVERRUN BIT(11)
-#define ACC_REG_CONTROL_MASK_IE_TSI BIT(12)
-#define ACC_REG_CONTROL_MASK_IE_ERRPASS BIT(13)
-#define ACC_REG_CONTROL_MASK_IE_ALI BIT(14)
-#define ACC_REG_CONTROL_MASK_IE_BUSERR BIT(15)
+/* CTRL register layout */
+#define ACC_REG_CTRL_MASK_RESETMODE BIT(0)
+#define ACC_REG_CTRL_MASK_LOM BIT(1)
+#define ACC_REG_CTRL_MASK_STM BIT(2)
+#define ACC_REG_CTRL_MASK_TRANSEN BIT(5)
+#define ACC_REG_CTRL_MASK_TS BIT(6)
+#define ACC_REG_CTRL_MASK_SCHEDULE BIT(7)
+
+#define ACC_REG_CTRL_MASK_IE_RXTX BIT(8)
+#define ACC_REG_CTRL_MASK_IE_TXERROR BIT(9)
+#define ACC_REG_CTRL_MASK_IE_ERRWARN BIT(10)
+#define ACC_REG_CTRL_MASK_IE_OVERRUN BIT(11)
+#define ACC_REG_CTRL_MASK_IE_TSI BIT(12)
+#define ACC_REG_CTRL_MASK_IE_ERRPASS BIT(13)
+#define ACC_REG_CTRL_MASK_IE_ALI BIT(14)
+#define ACC_REG_CTRL_MASK_IE_BUSERR BIT(15)
 
 /* BRP and BTR register layout for CAN-Classic version */
 #define ACC_REG_BRP_CL_MASK_BRP GENMASK(8, 0)
@@ -300,9 +302,9 @@ static inline void acc_clear_bits(struct acc_core *core,
 
 static inline int acc_resetmode_entered(struct acc_core *core)
 {
-	u32 ctrl = acc_read32(core, ACC_CORE_OF_CTRL_MODE);
+	u32 ctrl = acc_read32(core, ACC_CORE_OF_CTRL);
 
-	return (ctrl & ACC_REG_CONTROL_MASK_MODE_RESETMODE) != 0;
+	return (ctrl & ACC_REG_CTRL_MASK_RESETMODE) != 0;
 }
 
 static inline u32 acc_ov_read32(struct acc_ov *ov, unsigned short offs)

drivers/net/can/flexcan/flexcan-core.c

@@ -354,6 +354,14 @@ static struct flexcan_devtype_data fsl_imx93_devtype_data = {
 		FLEXCAN_QUIRK_SUPPORT_RX_MAILBOX_RTR,
 };
 
+static const struct flexcan_devtype_data fsl_imx95_devtype_data = {
+	.quirks = FLEXCAN_QUIRK_DISABLE_RXFG | FLEXCAN_QUIRK_ENABLE_EACEN_RRS |
+		FLEXCAN_QUIRK_DISABLE_MECR | FLEXCAN_QUIRK_USE_RX_MAILBOX |
+		FLEXCAN_QUIRK_BROKEN_PERR_STATE | FLEXCAN_QUIRK_SUPPORT_FD |
+		FLEXCAN_QUIRK_SUPPORT_ECC | FLEXCAN_QUIRK_SUPPORT_RX_MAILBOX |
+		FLEXCAN_QUIRK_SUPPORT_RX_MAILBOX_RTR | FLEXCAN_QUIRK_SETUP_STOP_MODE_SCMI,
+};
+
 static const struct flexcan_devtype_data fsl_vf610_devtype_data = {
 	.quirks = FLEXCAN_QUIRK_DISABLE_RXFG | FLEXCAN_QUIRK_ENABLE_EACEN_RRS |
 		FLEXCAN_QUIRK_DISABLE_MECR | FLEXCAN_QUIRK_USE_RX_MAILBOX |
@@ -544,6 +552,13 @@ static inline int flexcan_enter_stop_mode(struct flexcan_priv *priv)
 	} else if (priv->devtype_data.quirks & FLEXCAN_QUIRK_SETUP_STOP_MODE_GPR) {
 		regmap_update_bits(priv->stm.gpr, priv->stm.req_gpr,
 				   1 << priv->stm.req_bit, 1 << priv->stm.req_bit);
+	} else if (priv->devtype_data.quirks & FLEXCAN_QUIRK_SETUP_STOP_MODE_SCMI) {
+		/* For the SCMI mode, driver do nothing, ATF will send request to
+		 * SM(system manager, M33 core) through SCMI protocol after linux
+		 * suspend. Once SM get this request, it will send IPG_STOP signal
+		 * to Flex_CAN, let CAN in STOP mode.
+		 */
+		return 0;
 	}
 
 	return flexcan_low_power_enter_ack(priv);
@@ -555,7 +570,11 @@ static inline int flexcan_exit_stop_mode(struct flexcan_priv *priv)
 	u32 reg_mcr;
 	int ret;
 
-	/* remove stop request */
+	/* Remove stop request, for FLEXCAN_QUIRK_SETUP_STOP_MODE_SCMI,
+	 * do nothing here, because ATF already send request to SM before
+	 * linux resume. Once SM get this request, it will deassert the
+	 * IPG_STOP signal to Flex_CAN.
+	 */
 	if (priv->devtype_data.quirks & FLEXCAN_QUIRK_SETUP_STOP_MODE_SCFW) {
 		ret = flexcan_stop_mode_enable_scfw(priv, false);
 		if (ret < 0)
@@ -1983,6 +2002,9 @@ static int flexcan_setup_stop_mode(struct platform_device *pdev)
 		ret = flexcan_setup_stop_mode_scfw(pdev);
 	else if (priv->devtype_data.quirks & FLEXCAN_QUIRK_SETUP_STOP_MODE_GPR)
 		ret = flexcan_setup_stop_mode_gpr(pdev);
+	else if (priv->devtype_data.quirks & FLEXCAN_QUIRK_SETUP_STOP_MODE_SCMI)
+		/* ATF will handle all STOP_IPG related work */
+		ret = 0;
 	else
 		/* return 0 directly if doesn't support stop mode feature */
 		return 0;
@@ -2009,6 +2031,7 @@ static const struct of_device_id flexcan_of_match[] = {
 	{ .compatible = "fsl,imx8qm-flexcan", .data = &fsl_imx8qm_devtype_data, },
 	{ .compatible = "fsl,imx8mp-flexcan", .data = &fsl_imx8mp_devtype_data, },
 	{ .compatible = "fsl,imx93-flexcan", .data = &fsl_imx93_devtype_data, },
+	{ .compatible = "fsl,imx95-flexcan", .data = &fsl_imx95_devtype_data, },
 	{ .compatible = "fsl,imx6q-flexcan", .data = &fsl_imx6q_devtype_data, },
 	{ .compatible = "fsl,imx28-flexcan", .data = &fsl_imx28_devtype_data, },
 	{ .compatible = "fsl,imx53-flexcan", .data = &fsl_imx25_devtype_data, },
@@ -2309,9 +2332,19 @@ static int __maybe_unused flexcan_noirq_suspend(struct device *device)
 		if (device_may_wakeup(device))
 			flexcan_enable_wakeup_irq(priv, true);
 
-		err = pm_runtime_force_suspend(device);
-		if (err)
-			return err;
+		/* For FLEXCAN_QUIRK_SETUP_STOP_MODE_SCMI, it need ATF to send
+		 * to SM through SCMI protocol, SM will assert the IPG_STOP
+		 * signal. But all this works need the CAN clocks keep on.
+		 * After the CAN module get the IPG_STOP mode, and switch to
+		 * STOP mode, whether still keep the CAN clocks on or gate them
+		 * off depend on the Hardware design.
+		 */
+		if (!(device_may_wakeup(device) &&
+		      priv->devtype_data.quirks & FLEXCAN_QUIRK_SETUP_STOP_MODE_SCMI)) {
+			err = pm_runtime_force_suspend(device);
+			if (err)
+				return err;
+		}
 	}
 
 	return 0;
@@ -2325,9 +2358,12 @@ static int __maybe_unused flexcan_noirq_resume(struct device *device)
 	if (netif_running(dev)) {
 		int err;
 
-		err = pm_runtime_force_resume(device);
-		if (err)
-			return err;
+		if (!(device_may_wakeup(device) &&
+		      priv->devtype_data.quirks & FLEXCAN_QUIRK_SETUP_STOP_MODE_SCMI)) {
+			err = pm_runtime_force_resume(device);
+			if (err)
+				return err;
+		}
 
 		if (device_may_wakeup(device))
 			flexcan_enable_wakeup_irq(priv, false);

drivers/net/can/flexcan/flexcan.h

@@ -68,6 +68,8 @@
 #define FLEXCAN_QUIRK_SUPPORT_RX_MAILBOX_RTR BIT(15)
 /* Device supports RX via FIFO */
 #define FLEXCAN_QUIRK_SUPPORT_RX_FIFO BIT(16)
+/* Setup stop mode with ATF SCMI protocol to support wakeup */
+#define FLEXCAN_QUIRK_SETUP_STOP_MODE_SCMI BIT(17)
 
 struct flexcan_devtype_data {
 	u32 quirks;		/* quirks needed for different IP cores */

drivers/net/can/usb/kvaser_usb/kvaser_usb.h

@@ -22,6 +22,8 @@
  */
 
 #include <linux/completion.h>
+#include <linux/ktime.h>
+#include <linux/math64.h>
 #include <linux/spinlock.h>
 #include <linux/types.h>
 #include <linux/usb.h>
@@ -39,7 +41,6 @@
 #define KVASER_USB_QUIRK_HAS_SILENT_MODE	BIT(0)
 #define KVASER_USB_QUIRK_HAS_TXRX_ERRORS	BIT(1)
 #define KVASER_USB_QUIRK_IGNORE_CLK_FREQ	BIT(2)
-#define KVASER_USB_QUIRK_HAS_HARDWARE_TIMESTAMP	BIT(3)
 
 /* Device capabilities */
 #define KVASER_USB_CAP_BERR_CAP			0x01
@@ -68,6 +69,7 @@ struct kvaser_usb_dev_card_data {
 	u32 ctrlmode_supported;
 	u32 capabilities;
 	struct kvaser_usb_dev_card_data_hydra hydra;
+	u32 usbcan_timestamp_msb;
 };
 
 /* Context for an outstanding, not yet ACKed, transmission */
@@ -216,4 +218,26 @@ int kvaser_usb_can_rx_over_error(struct net_device *netdev);
 
 extern const struct can_bittiming_const kvaser_usb_flexc_bittiming_const;
 
+static inline ktime_t kvaser_usb_ticks_to_ktime(const struct kvaser_usb_dev_cfg *cfg,
+						u64 ticks)
+{
+	return ns_to_ktime(div_u64(ticks * 1000, cfg->timestamp_freq));
+}
+
+static inline ktime_t kvaser_usb_timestamp48_to_ktime(const struct kvaser_usb_dev_cfg *cfg,
+						      const __le16 *timestamp)
+{
+	u64 ticks = le16_to_cpu(timestamp[0]) |
+		    (u64)(le16_to_cpu(timestamp[1])) << 16 |
+		    (u64)(le16_to_cpu(timestamp[2])) << 32;
+
+	return kvaser_usb_ticks_to_ktime(cfg, ticks);
+}
+
+static inline ktime_t kvaser_usb_timestamp64_to_ktime(const struct kvaser_usb_dev_cfg *cfg,
+						      __le64 timestamp)
+{
+	return kvaser_usb_ticks_to_ktime(cfg, le64_to_cpu(timestamp));
+}
+
 #endif /* KVASER_USB_H */

drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c

@@ -94,7 +94,7 @@
 #define USB_MINI_PCIE_1XCAN_PRODUCT_ID 0x011B
 
 static const struct kvaser_usb_driver_info kvaser_usb_driver_info_hydra = {
-	.quirks = KVASER_USB_QUIRK_HAS_HARDWARE_TIMESTAMP,
+	.quirks = 0,
 	.ops = &kvaser_usb_hydra_dev_ops,
 };
 
@@ -754,13 +754,6 @@ static netdev_tx_t kvaser_usb_start_xmit(struct sk_buff *skb,
 }
 
 static const struct net_device_ops kvaser_usb_netdev_ops = {
-	.ndo_open = kvaser_usb_open,
-	.ndo_stop = kvaser_usb_close,
-	.ndo_start_xmit = kvaser_usb_start_xmit,
-	.ndo_change_mtu = can_change_mtu,
-};
-
-static const struct net_device_ops kvaser_usb_netdev_ops_hwts = {
 	.ndo_open = kvaser_usb_open,
 	.ndo_stop = kvaser_usb_close,
 	.ndo_eth_ioctl = can_eth_ioctl_hwts,
@@ -769,10 +762,6 @@ static const struct net_device_ops kvaser_usb_netdev_ops_hwts = {
 };
 
 static const struct ethtool_ops kvaser_usb_ethtool_ops = {
-	.get_ts_info = ethtool_op_get_ts_info,
-};
-
-static const struct ethtool_ops kvaser_usb_ethtool_ops_hwts = {
 	.get_ts_info = can_ethtool_op_get_ts_info_hwts,
 };
 
@@ -859,13 +848,7 @@ static int kvaser_usb_init_one(struct kvaser_usb *dev, int channel)
 	netdev->flags |= IFF_ECHO;
 
 	netdev->netdev_ops = &kvaser_usb_netdev_ops;
-	if (driver_info->quirks & KVASER_USB_QUIRK_HAS_HARDWARE_TIMESTAMP) {
-		netdev->netdev_ops = &kvaser_usb_netdev_ops_hwts;
-		netdev->ethtool_ops = &kvaser_usb_ethtool_ops_hwts;
-	} else {
-		netdev->netdev_ops = &kvaser_usb_netdev_ops;
-		netdev->ethtool_ops = &kvaser_usb_ethtool_ops;
-	}
+	netdev->ethtool_ops = &kvaser_usb_ethtool_ops;
 	SET_NETDEV_DEV(netdev, &dev->intf->dev);
 	netdev->dev_id = channel;
 

drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c

@@ -10,7 +10,6 @@
  *  - Transition from CAN_STATE_ERROR_WARNING to CAN_STATE_ERROR_ACTIVE is only
  *    reported after a call to do_get_berr_counter(), since firmware does not
  *    distinguish between ERROR_WARNING and ERROR_ACTIVE.
- *  - Hardware timestamps are not set for CAN Tx frames.
  */
 
 #include <linux/completion.h>
@@ -261,6 +260,15 @@ struct kvaser_cmd_tx_can {
 	u8 reserved[11];
 } __packed;
 
+struct kvaser_cmd_tx_ack {
+	__le32 id;
+	u8 data[8];
+	u8 dlc;
+	u8 flags;
+	__le16 timestamp[3];
+	u8 reserved0[8];
+} __packed;
+
 struct kvaser_cmd_header {
 	u8 cmd_no;
 	/* The destination HE address is stored in 0..5 of he_addr.
@@ -297,6 +305,7 @@ struct kvaser_cmd {
 
 		struct kvaser_cmd_rx_can rx_can;
 		struct kvaser_cmd_tx_can tx_can;
+		struct kvaser_cmd_tx_ack tx_ack;
 	} __packed;
 } __packed;
 
@@ -522,23 +531,25 @@ kvaser_usb_hydra_net_priv_from_cmd(const struct kvaser_usb *dev,
 	return priv;
 }
 
-static ktime_t
-kvaser_usb_hydra_ktime_from_rx_cmd(const struct kvaser_usb_dev_cfg *cfg,
-				   const struct kvaser_cmd *cmd)
+static ktime_t kvaser_usb_hydra_ktime_from_cmd(const struct kvaser_usb_dev_cfg *cfg,
+					       const struct kvaser_cmd *cmd)
 {
-	u64 ticks;
+	ktime_t hwtstamp = 0;
 
 	if (cmd->header.cmd_no == CMD_EXTENDED) {
 		struct kvaser_cmd_ext *cmd_ext = (struct kvaser_cmd_ext *)cmd;
 
-		ticks = le64_to_cpu(cmd_ext->rx_can.timestamp);
-	} else {
-		ticks = le16_to_cpu(cmd->rx_can.timestamp[0]);
-		ticks += (u64)(le16_to_cpu(cmd->rx_can.timestamp[1])) << 16;
-		ticks += (u64)(le16_to_cpu(cmd->rx_can.timestamp[2])) << 32;
+		if (cmd_ext->cmd_no_ext == CMD_RX_MESSAGE_FD)
+			hwtstamp = kvaser_usb_timestamp64_to_ktime(cfg, cmd_ext->rx_can.timestamp);
+		else if (cmd_ext->cmd_no_ext == CMD_TX_ACKNOWLEDGE_FD)
+			hwtstamp = kvaser_usb_timestamp64_to_ktime(cfg, cmd_ext->tx_ack.timestamp);
+	} else if (cmd->header.cmd_no == CMD_RX_MESSAGE) {
+		hwtstamp = kvaser_usb_timestamp48_to_ktime(cfg, cmd->rx_can.timestamp);
+	} else if (cmd->header.cmd_no == CMD_TX_ACKNOWLEDGE) {
+		hwtstamp = kvaser_usb_timestamp48_to_ktime(cfg, cmd->tx_ack.timestamp);
 	}
 
-	return ns_to_ktime(div_u64(ticks * 1000, cfg->timestamp_freq));
+	return hwtstamp;
 }
 
 static int kvaser_usb_hydra_send_simple_cmd(struct kvaser_usb *dev,
@@ -1175,6 +1186,7 @@ static void kvaser_usb_hydra_tx_acknowledge(const struct kvaser_usb *dev,
 	bool one_shot_fail = false;
 	bool is_err_frame = false;
 	u16 transid = kvaser_usb_hydra_get_cmd_transid(cmd);
+	struct sk_buff *skb;
 
 	priv = kvaser_usb_hydra_net_priv_from_cmd(dev, cmd);
 	if (!priv)
@@ -1201,6 +1213,9 @@ static void kvaser_usb_hydra_tx_acknowledge(const struct kvaser_usb *dev,
 
 	spin_lock_irqsave(&priv->tx_contexts_lock, irq_flags);
 
+	skb = priv->can.echo_skb[context->echo_index];
+	if (skb)
+		skb_hwtstamps(skb)->hwtstamp = kvaser_usb_hydra_ktime_from_cmd(dev->cfg, cmd);
 	len = can_get_echo_skb(priv->netdev, context->echo_index, NULL);
 	context->echo_index = dev->max_tx_urbs;
 	--priv->active_tx_contexts;
@@ -1234,7 +1249,7 @@ static void kvaser_usb_hydra_rx_msg_std(const struct kvaser_usb *dev,
 	stats = &priv->netdev->stats;
 
 	flags = cmd->rx_can.flags;
-	hwtstamp = kvaser_usb_hydra_ktime_from_rx_cmd(dev->cfg, cmd);
+	hwtstamp = kvaser_usb_hydra_ktime_from_cmd(dev->cfg, cmd);
 
 	if (flags & KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME) {
 		kvaser_usb_hydra_error_frame(priv, &cmd->rx_can.err_frame_data,
@@ -1302,7 +1317,7 @@ static void kvaser_usb_hydra_rx_msg_ext(const struct kvaser_usb *dev,
 		KVASER_USB_KCAN_DATA_DLC_SHIFT;
 
 	flags = le32_to_cpu(cmd->rx_can.flags);
-	hwtstamp = kvaser_usb_hydra_ktime_from_rx_cmd(dev->cfg, std_cmd);
+	hwtstamp = kvaser_usb_hydra_ktime_from_cmd(dev->cfg, std_cmd);
 
 	if (flags & KVASER_USB_HYDRA_CF_FLAG_ERROR_FRAME) {
 		kvaser_usb_hydra_error_frame(priv, &cmd->rx_can.err_frame_data,

drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c

@@ -119,6 +119,10 @@
 /* Extended CAN identifier flag */
 #define KVASER_EXTENDED_FRAME		BIT(31)
 
+/* USBCanII timestamp */
+#define KVASER_USB_USBCAN_CLK_OVERFLOW_MASK GENMASK(31, 16)
+#define KVASER_USB_USBCAN_TIMESTAMP_FACTOR 10
+
 struct kvaser_cmd_simple {
 	u8 tid;
 	u8 channel;
@@ -235,6 +239,20 @@ struct kvaser_cmd_tx_acknowledge_header {
 	u8 tid;
 } __packed;
 
+struct leaf_cmd_tx_acknowledge {
+	u8 channel;
+	u8 tid;
+	__le16 time[3];
+	u8 padding[2];
+} __packed;
+
+struct usbcan_cmd_tx_acknowledge {
+	u8 channel;
+	u8 tid;
+	__le16 time;
+	u8 padding[2];
+} __packed;
+
 struct leaf_cmd_can_error_event {
 	u8 tid;
 	u8 flags;
@@ -281,6 +299,12 @@ struct usbcan_cmd_error_event {
 	__le16 padding;
 } __packed;
 
+struct usbcan_cmd_clk_overflow_event {
+	u8 tid;
+	u8 padding;
+	__le32 time;
+} __packed;
+
 struct kvaser_cmd_ctrl_mode {
 	u8 tid;
 	u8 channel;
@@ -347,6 +371,7 @@ struct kvaser_cmd {
 			struct leaf_cmd_error_event error_event;
 			struct kvaser_cmd_cap_req cap_req;
 			struct kvaser_cmd_cap_res cap_res;
+			struct leaf_cmd_tx_acknowledge tx_ack;
 		} __packed leaf;
 
 		union {
@@ -355,6 +380,8 @@ struct kvaser_cmd {
 			struct usbcan_cmd_chip_state_event chip_state_event;
 			struct usbcan_cmd_can_error_event can_error_event;
 			struct usbcan_cmd_error_event error_event;
+			struct usbcan_cmd_tx_acknowledge tx_ack;
+			struct usbcan_cmd_clk_overflow_event clk_overflow_event;
 		} __packed usbcan;
 
 		struct kvaser_cmd_tx_can tx_can;
@@ -370,7 +397,7 @@ static const u8 kvaser_usb_leaf_cmd_sizes_leaf[] = {
 	[CMD_START_CHIP_REPLY]		= kvaser_fsize(u.simple),
 	[CMD_STOP_CHIP_REPLY]		= kvaser_fsize(u.simple),
 	[CMD_GET_CARD_INFO_REPLY]	= kvaser_fsize(u.cardinfo),
-	[CMD_TX_ACKNOWLEDGE]		= kvaser_fsize(u.tx_acknowledge_header),
+	[CMD_TX_ACKNOWLEDGE]		= kvaser_fsize(u.leaf.tx_ack),
 	[CMD_GET_SOFTWARE_INFO_REPLY]	= kvaser_fsize(u.leaf.softinfo),
 	[CMD_RX_STD_MESSAGE]		= kvaser_fsize(u.leaf.rx_can),
 	[CMD_RX_EXT_MESSAGE]		= kvaser_fsize(u.leaf.rx_can),
@@ -388,15 +415,14 @@ static const u8 kvaser_usb_leaf_cmd_sizes_usbcan[] = {
 	[CMD_START_CHIP_REPLY]		= kvaser_fsize(u.simple),
 	[CMD_STOP_CHIP_REPLY]		= kvaser_fsize(u.simple),
 	[CMD_GET_CARD_INFO_REPLY]	= kvaser_fsize(u.cardinfo),
-	[CMD_TX_ACKNOWLEDGE]		= kvaser_fsize(u.tx_acknowledge_header),
+	[CMD_TX_ACKNOWLEDGE]		= kvaser_fsize(u.usbcan.tx_ack),
 	[CMD_GET_SOFTWARE_INFO_REPLY]	= kvaser_fsize(u.usbcan.softinfo),
 	[CMD_RX_STD_MESSAGE]		= kvaser_fsize(u.usbcan.rx_can),
 	[CMD_RX_EXT_MESSAGE]		= kvaser_fsize(u.usbcan.rx_can),
 	[CMD_CHIP_STATE_EVENT]		= kvaser_fsize(u.usbcan.chip_state_event),
 	[CMD_CAN_ERROR_EVENT]		= kvaser_fsize(u.usbcan.can_error_event),
 	[CMD_ERROR_EVENT]		= kvaser_fsize(u.usbcan.error_event),
-	/* ignored events: */
-	[CMD_USBCAN_CLOCK_OVERFLOW_EVENT] = CMD_SIZE_ANY,
+	[CMD_USBCAN_CLOCK_OVERFLOW_EVENT] = kvaser_fsize(u.usbcan.clk_overflow_event),
 };
 
 /* Summary of a kvaser error event, for a unified Leaf/Usbcan error
@@ -463,11 +489,27 @@ static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_usbcan_dev_cfg = {
 	.bittiming_const = &kvaser_usb_leaf_m16c_bittiming_const,
 };
 
-static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_m32c_dev_cfg = {
+static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_m32c_dev_cfg_16mhz = {
 	.clock = {
 		.freq = 16 * MEGA /* Hz */,
 	},
-	.timestamp_freq = 1,
+	.timestamp_freq = 16,
+	.bittiming_const = &kvaser_usb_leaf_m32c_bittiming_const,
+};
+
+static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_m32c_dev_cfg_24mhz = {
+	.clock = {
+		.freq = 16 * MEGA /* Hz */,
+	},
+	.timestamp_freq = 24,
+	.bittiming_const = &kvaser_usb_leaf_m32c_bittiming_const,
+};
+
+static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_m32c_dev_cfg_32mhz = {
+	.clock = {
+		.freq = 16 * MEGA /* Hz */,
+	},
+	.timestamp_freq = 32,
 	.bittiming_const = &kvaser_usb_leaf_m32c_bittiming_const,
 };
 
@@ -475,7 +517,7 @@ static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_imx_dev_cfg_16mhz = {
 	.clock = {
 		.freq = 16 * MEGA /* Hz */,
 	},
-	.timestamp_freq = 1,
+	.timestamp_freq = 16,
 	.bittiming_const = &kvaser_usb_flexc_bittiming_const,
 };
 
@@ -483,7 +525,7 @@ static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_imx_dev_cfg_24mhz = {
 	.clock = {
 		.freq = 24 * MEGA /* Hz */,
 	},
-	.timestamp_freq = 1,
+	.timestamp_freq = 24,
 	.bittiming_const = &kvaser_usb_flexc_bittiming_const,
 };
 
@@ -491,10 +533,19 @@ static const struct kvaser_usb_dev_cfg kvaser_usb_leaf_imx_dev_cfg_32mhz = {
 	.clock = {
 		.freq = 32 * MEGA /* Hz */,
 	},
-	.timestamp_freq = 1,
+	.timestamp_freq = 32,
 	.bittiming_const = &kvaser_usb_flexc_bittiming_const,
 };
 
+static inline ktime_t kvaser_usb_usbcan_timestamp_to_ktime(const struct kvaser_usb *dev,
+							   __le16 timestamp)
+{
+	u64 ticks = le16_to_cpu(timestamp) |
+		    dev->card_data.usbcan_timestamp_msb;
+
+	return kvaser_usb_ticks_to_ktime(dev->cfg, ticks * KVASER_USB_USBCAN_TIMESTAMP_FACTOR);
+}
+
 static int kvaser_usb_leaf_verify_size(const struct kvaser_usb *dev,
 				       const struct kvaser_cmd *cmd)
 {
@@ -678,8 +729,19 @@ static void kvaser_usb_leaf_get_software_info_leaf(struct kvaser_usb *dev,
 	if (dev->driver_info->quirks & KVASER_USB_QUIRK_IGNORE_CLK_FREQ) {
 		/* Firmware expects bittiming parameters calculated for 16MHz
 		 * clock, regardless of the actual clock
+		 * Though, the reported freq is used for timestamps
 		 */
-		dev->cfg = &kvaser_usb_leaf_m32c_dev_cfg;
+		switch (sw_options & KVASER_USB_LEAF_SWOPTION_FREQ_MASK) {
+		case KVASER_USB_LEAF_SWOPTION_FREQ_16_MHZ_CLK:
+			dev->cfg = &kvaser_usb_leaf_m32c_dev_cfg_16mhz;
+			break;
+		case KVASER_USB_LEAF_SWOPTION_FREQ_24_MHZ_CLK:
+			dev->cfg = &kvaser_usb_leaf_m32c_dev_cfg_24mhz;
+			break;
+		case KVASER_USB_LEAF_SWOPTION_FREQ_32_MHZ_CLK:
+			dev->cfg = &kvaser_usb_leaf_m32c_dev_cfg_32mhz;
+			break;
+		}
 	} else {
 		switch (sw_options & KVASER_USB_LEAF_SWOPTION_FREQ_MASK) {
 		case KVASER_USB_LEAF_SWOPTION_FREQ_16_MHZ_CLK:
@@ -880,6 +942,8 @@ static void kvaser_usb_leaf_tx_acknowledge(const struct kvaser_usb *dev,
 	struct kvaser_usb_net_priv *priv;
 	unsigned long flags;
 	u8 channel, tid;
+	struct sk_buff *skb;
+	ktime_t hwtstamp = 0;
 
 	channel = cmd->u.tx_acknowledge_header.channel;
 	tid = cmd->u.tx_acknowledge_header.tid;
@@ -901,14 +965,14 @@ static void kvaser_usb_leaf_tx_acknowledge(const struct kvaser_usb *dev,
 
 	/* Sometimes the state change doesn't come after a bus-off event */
 	if (priv->can.restart_ms && priv->can.state == CAN_STATE_BUS_OFF) {
-		struct sk_buff *skb;
+		struct sk_buff *err_skb;
 		struct can_frame *cf;
 
-		skb = alloc_can_err_skb(priv->netdev, &cf);
-		if (skb) {
+		err_skb = alloc_can_err_skb(priv->netdev, &cf);
+		if (err_skb) {
 			cf->can_id |= CAN_ERR_RESTARTED;
 
-			netif_rx(skb);
+			netif_rx(err_skb);
 		} else {
 			netdev_err(priv->netdev,
 				   "No memory left for err_skb\n");
@@ -919,9 +983,20 @@ static void kvaser_usb_leaf_tx_acknowledge(const struct kvaser_usb *dev,
 
 		priv->can.state = CAN_STATE_ERROR_ACTIVE;
 	}
+	switch (dev->driver_info->family) {
+	case KVASER_LEAF:
+		hwtstamp = kvaser_usb_timestamp48_to_ktime(dev->cfg, cmd->u.leaf.tx_ack.time);
+		break;
+	case KVASER_USBCAN:
+		hwtstamp = kvaser_usb_usbcan_timestamp_to_ktime(dev, cmd->u.usbcan.tx_ack.time);
+		break;
+	}
 
 	spin_lock_irqsave(&priv->tx_contexts_lock, flags);
 
+	skb = priv->can.echo_skb[context->echo_index];
+	if (skb)
+		skb_hwtstamps(skb)->hwtstamp = hwtstamp;
 	stats->tx_packets++;
 	stats->tx_bytes += can_get_echo_skb(priv->netdev,
 					    context->echo_index, NULL);
@@ -1299,6 +1374,7 @@ static void kvaser_usb_leaf_rx_can_msg(const struct kvaser_usb *dev,
 	struct net_device_stats *stats;
 	u8 channel = cmd->u.rx_can_header.channel;
 	const u8 *rx_data = NULL;	/* GCC */
+	ktime_t hwtstamp = 0;
 
 	if (channel >= dev->nchannels) {
 		dev_err(&dev->intf->dev,
@@ -1329,9 +1405,11 @@ static void kvaser_usb_leaf_rx_can_msg(const struct kvaser_usb *dev,
 	switch (dev->driver_info->family) {
 	case KVASER_LEAF:
 		rx_data = cmd->u.leaf.rx_can.data;
+		hwtstamp = kvaser_usb_timestamp48_to_ktime(dev->cfg, cmd->u.leaf.rx_can.time);
 		break;
 	case KVASER_USBCAN:
 		rx_data = cmd->u.usbcan.rx_can.data;
+		hwtstamp = kvaser_usb_usbcan_timestamp_to_ktime(dev, cmd->u.usbcan.rx_can.time);
 		break;
 	}
 
@@ -1375,6 +1453,7 @@ static void kvaser_usb_leaf_rx_can_msg(const struct kvaser_usb *dev,
 			memcpy(cf->data, &rx_data[6], cf->len);
 	}
 
+	skb_hwtstamps(skb)->hwtstamp = hwtstamp;
 	stats->rx_packets++;
 	if (!(cf->can_id & CAN_RTR_FLAG))
 		stats->rx_bytes += cf->len;
@@ -1508,7 +1587,7 @@ static void kvaser_usb_leaf_get_busparams_reply(const struct kvaser_usb *dev,
 	complete(&priv->get_busparams_comp);
 }
 
-static void kvaser_usb_leaf_handle_command(const struct kvaser_usb *dev,
+static void kvaser_usb_leaf_handle_command(struct kvaser_usb *dev,
 					   const struct kvaser_cmd *cmd)
 {
 	if (kvaser_usb_leaf_verify_size(dev, cmd) < 0)
@@ -1554,12 +1633,15 @@ static void kvaser_usb_leaf_handle_command(const struct kvaser_usb *dev,
 		kvaser_usb_leaf_get_busparams_reply(dev, cmd);
 		break;
 
-	/* Ignored commands */
 	case CMD_USBCAN_CLOCK_OVERFLOW_EVENT:
 		if (dev->driver_info->family != KVASER_USBCAN)
 			goto warn;
+		dev->card_data.usbcan_timestamp_msb =
+					le32_to_cpu(cmd->u.usbcan.clk_overflow_event.time) &
+					KVASER_USB_USBCAN_CLK_OVERFLOW_MASK;
 		break;
 
+	/* Ignored commands */
 	case CMD_FLUSH_QUEUE_REPLY:
 		if (dev->driver_info->family != KVASER_LEAF)
 			goto warn;