Merge tag 'linux-can-next-for-6.11-20240621' of...

Merge tag 'linux-can-next-for-6.11-20240621' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next

Marc Kleine-Budde says:

====================
pull-request: can-next 2024-06-21

The first 2 patches are by Andy Shevchenko, one cleans up the includes
in the mcp251x driver, the other one updates the sja100 plx_pci driver
to make use of predefines PCI subvendor ID.

Mans Rullgard's patch cleans up the Kconfig help text of for the slcan
driver.

Oliver Hartkopp provides a patch to update the documentation, which
removes the ISO 15675-2 specification version where possible.

The next 2 patches are by Harini T and update the documentation of the
xilinx_can driver.

Francesco Valla provides documentation for the ISO 15765-2 protocol.

A patch by Dr. David Alan Gilbert removes an unused struct from the
mscan driver.

12 patches are by Martin Jocic. The first three add support for 3 new
devices to the kvaser_usb driver. The remaining 9 first clean up the
kvaser_pciefd driver, and then add support for MSI.

Krzysztof Kozlowski contributes 3 patches simplifies the CAN SPI
drivers by making use of spi_get_device_match_data().

The last patch is by Martin Hundebøll, which reworks the m_can driver
to not enable the CAN transceiver during probe.

* tag 'linux-can-next-for-6.11-20240621' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next: (24 commits)
  can: m_can: don't enable transceiver when probing
  can: mcp251xfd: simplify with spi_get_device_match_data()
  can: mcp251x: simplify with spi_get_device_match_data()
  can: hi311x: simplify with spi_get_device_match_data()
  can: kvaser_pciefd: Add MSI interrupts
  can: kvaser_pciefd: Move reset of DMA RX buffers to the end of the ISR
  can: kvaser_pciefd: Change name of return code variable
  can: kvaser_pciefd: Rename board_irq to pci_irq
  can: kvaser_pciefd: Add unlikely
  can: kvaser_pciefd: Add inline
  can: kvaser_pciefd: Remove unnecessary comment
  can: kvaser_pciefd: Skip redundant NULL pointer check in ISR
  can: kvaser_pciefd: Group #defines together
  can: kvaser_usb: Add support for Kvaser Mini PCIe 1xCAN
  can: kvaser_usb: Add support for Kvaser USBcan Pro 5xCAN
  can: kvaser_usb: Add support for Vining 800
  can: mscan: remove unused struct 'mscan_state'
  Documentation: networking: document ISO 15765-2
  can: xilinx_can: Document driver description to list all supported IPs
  can: isotp: remove ISO 15675-2 specification version where possible
  ...
====================

Link: https://patch.msgid.link/20240621080201.305471-1-mkl@pengutronix.deSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/devicetree/bindings/net/can/xilinx,can.yaml

@@ -5,7 +5,7 @@ $id: http://devicetree.org/schemas/net/can/xilinx,can.yaml#
 $schema: http://devicetree.org/meta-schemas/core.yaml#
 
 title:
-  Xilinx Axi CAN/Zynq CANPS controller
+  Xilinx CAN and CANFD controller
 
 maintainers:
   - Appana Durga Kedareswara rao <appana.durga.rao@xilinx.com>

Documentation/networking/index.rst

@@ -19,6 +19,7 @@ Contents:
    caif/index
    ethtool-netlink
    ieee802154
+   iso15765-2
    j1939
    kapi
    msg_zerocopy

MAINTAINERS

@@ -4842,6 +4842,7 @@ W:	https://github.com/linux-can
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can.git
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next.git
 F:	Documentation/networking/can.rst
+F:	Documentation/networking/iso15765-2.rst
 F:	include/linux/can/can-ml.h
 F:	include/linux/can/core.h
 F:	include/linux/can/skb.h

drivers/net/can/Kconfig

@@ -187,9 +187,8 @@ config CAN_SLCAN
 	  slcand) can be found in the can-utils at the linux-can project, see
 	  https://github.com/linux-can/can-utils for details.
 
-	  The slcan driver supports up to 10 CAN netdevices by default which
-	  can be changed by the 'maxdev=xx' module option. This driver can
-	  also be built as a module. If so, the module will be called slcan.
+	  This driver can also be built as a module. If so, the module
+	  will be called slcan.
 
 config CAN_SUN4I
 	tristate "Allwinner A10 CAN controller"

drivers/net/can/kvaser_pciefd.c

@@ -29,10 +29,10 @@ MODULE_DESCRIPTION("CAN driver for Kvaser CAN/PCIe devices");
 #define KVASER_PCIEFD_CAN_TX_MAX_COUNT 17U
 #define KVASER_PCIEFD_MAX_CAN_CHANNELS 8UL
 #define KVASER_PCIEFD_DMA_COUNT 2U
-
 #define KVASER_PCIEFD_DMA_SIZE (4U * 1024U)
 
 #define KVASER_PCIEFD_VENDOR 0x1a07
+
 /* Altera based devices */
 #define KVASER_PCIEFD_4HS_DEVICE_ID 0x000d
 #define KVASER_PCIEFD_2HS_V2_DEVICE_ID 0x000e
@@ -550,7 +550,7 @@ static void kvaser_pciefd_disable_err_gen(struct kvaser_pciefd_can *can)
 	spin_unlock_irqrestore(&can->lock, irq);
 }
 
-static void kvaser_pciefd_set_tx_irq(struct kvaser_pciefd_can *can)
+static inline void kvaser_pciefd_set_tx_irq(struct kvaser_pciefd_can *can)
 {
 	u32 msk;
 
@@ -711,17 +711,17 @@ static void kvaser_pciefd_pwm_start(struct kvaser_pciefd_can *can)
 
 static int kvaser_pciefd_open(struct net_device *netdev)
 {
-	int err;
+	int ret;
 	struct kvaser_pciefd_can *can = netdev_priv(netdev);
 
-	err = open_candev(netdev);
-	if (err)
-		return err;
+	ret = open_candev(netdev);
+	if (ret)
+		return ret;
 
-	err = kvaser_pciefd_bus_on(can);
-	if (err) {
+	ret = kvaser_pciefd_bus_on(can);
+	if (ret) {
 		close_candev(netdev);
-		return err;
+		return ret;
 	}
 
 	return 0;
@@ -1032,15 +1032,15 @@ static int kvaser_pciefd_reg_candev(struct kvaser_pciefd *pcie)
 	int i;
 
 	for (i = 0; i < pcie->nr_channels; i++) {
-		int err = register_candev(pcie->can[i]->can.dev);
+		int ret = register_candev(pcie->can[i]->can.dev);
 
-		if (err) {
+		if (ret) {
 			int j;
 
 			/* Unregister all successfully registered devices. */
 			for (j = 0; j < i; j++)
 				unregister_candev(pcie->can[j]->can.dev);
-			return err;
+			return ret;
 		}
 	}
 
@@ -1619,7 +1619,7 @@ static int kvaser_pciefd_read_packet(struct kvaser_pciefd *pcie, int *start_pos,
 	/* Position does not point to the end of the package,
 	 * corrupted packet size?
 	 */
-	if ((*start_pos + size) != pos)
+	if (unlikely((*start_pos + size) != pos))
 		return -EIO;
 
 	/* Point to the next packet header, if any */
@@ -1640,31 +1640,24 @@ static int kvaser_pciefd_read_buffer(struct kvaser_pciefd *pcie, int dma_buf)
 	return res;
 }
 
-static void kvaser_pciefd_receive_irq(struct kvaser_pciefd *pcie)
+static u32 kvaser_pciefd_receive_irq(struct kvaser_pciefd *pcie)
 {
 	u32 irq = ioread32(KVASER_PCIEFD_SRB_ADDR(pcie) + KVASER_PCIEFD_SRB_IRQ_REG);
 
-	if (irq & KVASER_PCIEFD_SRB_IRQ_DPD0) {
+	if (irq & KVASER_PCIEFD_SRB_IRQ_DPD0)
 		kvaser_pciefd_read_buffer(pcie, 0);
-		/* Reset DMA buffer 0 */
-		iowrite32(KVASER_PCIEFD_SRB_CMD_RDB0,
-			  KVASER_PCIEFD_SRB_ADDR(pcie) + KVASER_PCIEFD_SRB_CMD_REG);
-	}
 
-	if (irq & KVASER_PCIEFD_SRB_IRQ_DPD1) {
+	if (irq & KVASER_PCIEFD_SRB_IRQ_DPD1)
 		kvaser_pciefd_read_buffer(pcie, 1);
-		/* Reset DMA buffer 1 */
-		iowrite32(KVASER_PCIEFD_SRB_CMD_RDB1,
-			  KVASER_PCIEFD_SRB_ADDR(pcie) + KVASER_PCIEFD_SRB_CMD_REG);
-	}
 
-	if (irq & KVASER_PCIEFD_SRB_IRQ_DOF0 ||
-	    irq & KVASER_PCIEFD_SRB_IRQ_DOF1 ||
-	    irq & KVASER_PCIEFD_SRB_IRQ_DUF0 ||
-	    irq & KVASER_PCIEFD_SRB_IRQ_DUF1)
+	if (unlikely(irq & KVASER_PCIEFD_SRB_IRQ_DOF0 ||
+		     irq & KVASER_PCIEFD_SRB_IRQ_DOF1 ||
+		     irq & KVASER_PCIEFD_SRB_IRQ_DUF0 ||
+		     irq & KVASER_PCIEFD_SRB_IRQ_DUF1))
 		dev_err(&pcie->pci->dev, "DMA IRQ error 0x%08X\n", irq);
 
 	iowrite32(irq, KVASER_PCIEFD_SRB_ADDR(pcie) + KVASER_PCIEFD_SRB_IRQ_REG);
+	return irq;
 }
 
 static void kvaser_pciefd_transmit_irq(struct kvaser_pciefd_can *can)
@@ -1691,27 +1684,33 @@ static irqreturn_t kvaser_pciefd_irq_handler(int irq, void *dev)
 {
 	struct kvaser_pciefd *pcie = (struct kvaser_pciefd *)dev;
 	const struct kvaser_pciefd_irq_mask *irq_mask = pcie->driver_data->irq_mask;
-	u32 board_irq = ioread32(KVASER_PCIEFD_PCI_IRQ_ADDR(pcie));
+	u32 pci_irq = ioread32(KVASER_PCIEFD_PCI_IRQ_ADDR(pcie));
+	u32 srb_irq = 0;
 	int i;
 
-	if (!(board_irq & irq_mask->all))
+	if (!(pci_irq & irq_mask->all))
 		return IRQ_NONE;
 
-	if (board_irq & irq_mask->kcan_rx0)
-		kvaser_pciefd_receive_irq(pcie);
+	if (pci_irq & irq_mask->kcan_rx0)
+		srb_irq = kvaser_pciefd_receive_irq(pcie);
 
 	for (i = 0; i < pcie->nr_channels; i++) {
-		if (!pcie->can[i]) {
-			dev_err(&pcie->pci->dev,
-				"IRQ mask points to unallocated controller\n");
-			break;
-		}
-
-		/* Check that mask matches channel (i) IRQ mask */
-		if (board_irq & irq_mask->kcan_tx[i])
+		if (pci_irq & irq_mask->kcan_tx[i])
 			kvaser_pciefd_transmit_irq(pcie->can[i]);
 	}
 
+	if (srb_irq & KVASER_PCIEFD_SRB_IRQ_DPD0) {
+		/* Reset DMA buffer 0, may trigger new interrupt */
+		iowrite32(KVASER_PCIEFD_SRB_CMD_RDB0,
+			  KVASER_PCIEFD_SRB_ADDR(pcie) + KVASER_PCIEFD_SRB_CMD_REG);
+	}
+
+	if (srb_irq & KVASER_PCIEFD_SRB_IRQ_DPD1) {
+		/* Reset DMA buffer 1, may trigger new interrupt */
+		iowrite32(KVASER_PCIEFD_SRB_CMD_RDB1,
+			  KVASER_PCIEFD_SRB_ADDR(pcie) + KVASER_PCIEFD_SRB_CMD_REG);
+	}
+
 	return IRQ_HANDLED;
 }
 
@@ -1733,7 +1732,7 @@ static void kvaser_pciefd_teardown_can_ctrls(struct kvaser_pciefd *pcie)
 static int kvaser_pciefd_probe(struct pci_dev *pdev,
 			       const struct pci_device_id *id)
 {
-	int err;
+	int ret;
 	struct kvaser_pciefd *pcie;
 	const struct kvaser_pciefd_irq_mask *irq_mask;
 	void __iomem *irq_en_base;
@@ -1747,39 +1746,52 @@ static int kvaser_pciefd_probe(struct pci_dev *pdev,
 	pcie->driver_data = (const struct kvaser_pciefd_driver_data *)id->driver_data;
 	irq_mask = pcie->driver_data->irq_mask;
 
-	err = pci_enable_device(pdev);
-	if (err)
-		return err;
+	ret = pci_enable_device(pdev);
+	if (ret)
+		return ret;
 
-	err = pci_request_regions(pdev, KVASER_PCIEFD_DRV_NAME);
-	if (err)
+	ret = pci_request_regions(pdev, KVASER_PCIEFD_DRV_NAME);
+	if (ret)
 		goto err_disable_pci;
 
 	pcie->reg_base = pci_iomap(pdev, 0, 0);
 	if (!pcie->reg_base) {
-		err = -ENOMEM;
+		ret = -ENOMEM;
 		goto err_release_regions;
 	}
 
-	err = kvaser_pciefd_setup_board(pcie);
-	if (err)
+	ret = kvaser_pciefd_setup_board(pcie);
+	if (ret)
 		goto err_pci_iounmap;
 
-	err = kvaser_pciefd_setup_dma(pcie);
-	if (err)
+	ret = kvaser_pciefd_setup_dma(pcie);
+	if (ret)
 		goto err_pci_iounmap;
 
 	pci_set_master(pdev);
 
-	err = kvaser_pciefd_setup_can_ctrls(pcie);
-	if (err)
+	ret = kvaser_pciefd_setup_can_ctrls(pcie);
+	if (ret)
 		goto err_teardown_can_ctrls;
 
-	err = request_irq(pcie->pci->irq, kvaser_pciefd_irq_handler,
-			  IRQF_SHARED, KVASER_PCIEFD_DRV_NAME, pcie);
-	if (err)
+	ret = pci_alloc_irq_vectors(pcie->pci, 1, 1, PCI_IRQ_INTX | PCI_IRQ_MSI);
+	if (ret < 0) {
+		dev_err(&pcie->pci->dev, "Failed to allocate IRQ vectors.\n");
 		goto err_teardown_can_ctrls;
+	}
+
+	ret = pci_irq_vector(pcie->pci, 0);
+	if (ret < 0)
+		goto err_pci_free_irq_vectors;
+
+	pcie->pci->irq = ret;
 
+	ret = request_irq(pcie->pci->irq, kvaser_pciefd_irq_handler,
+			  IRQF_SHARED, KVASER_PCIEFD_DRV_NAME, pcie);
+	if (ret) {
+		dev_err(&pcie->pci->dev, "Failed to request IRQ %d\n", pcie->pci->irq);
+		goto err_pci_free_irq_vectors;
+	}
 	iowrite32(KVASER_PCIEFD_SRB_IRQ_DPD0 | KVASER_PCIEFD_SRB_IRQ_DPD1,
 		  KVASER_PCIEFD_SRB_ADDR(pcie) + KVASER_PCIEFD_SRB_IRQ_REG);
 
@@ -1797,8 +1809,8 @@ static int kvaser_pciefd_probe(struct pci_dev *pdev,
 	iowrite32(KVASER_PCIEFD_SRB_CMD_RDB1,
 		  KVASER_PCIEFD_SRB_ADDR(pcie) + KVASER_PCIEFD_SRB_CMD_REG);
 
-	err = kvaser_pciefd_reg_candev(pcie);
-	if (err)
+	ret = kvaser_pciefd_reg_candev(pcie);
+	if (ret)
 		goto err_free_irq;
 
 	return 0;
@@ -1808,6 +1820,9 @@ static int kvaser_pciefd_probe(struct pci_dev *pdev,
 	iowrite32(0, irq_en_base);
 	free_irq(pcie->pci->irq, pcie);
 
+err_pci_free_irq_vectors:
+	pci_free_irq_vectors(pcie->pci);
+
 err_teardown_can_ctrls:
 	kvaser_pciefd_teardown_can_ctrls(pcie);
 	iowrite32(0, KVASER_PCIEFD_SRB_ADDR(pcie) + KVASER_PCIEFD_SRB_CTRL_REG);
@@ -1822,7 +1837,7 @@ static int kvaser_pciefd_probe(struct pci_dev *pdev,
 err_disable_pci:
 	pci_disable_device(pdev);
 
-	return err;
+	return ret;
 }
 
 static void kvaser_pciefd_remove_all_ctrls(struct kvaser_pciefd *pcie)
@@ -1853,7 +1868,7 @@ static void kvaser_pciefd_remove(struct pci_dev *pdev)
 	iowrite32(0, KVASER_PCIEFD_PCI_IEN_ADDR(pcie));
 
 	free_irq(pcie->pci->irq, pcie);
-
+	pci_free_irq_vectors(pcie->pci);
 	pci_iounmap(pdev, pcie->reg_base);
 	pci_release_regions(pdev);
 	pci_disable_device(pdev);

drivers/net/can/m_can/m_can.c

@@ -379,38 +379,72 @@ m_can_txe_fifo_read(struct m_can_classdev *cdev, u32 fgi, u32 offset, u32 *val)
 	return cdev->ops->read_fifo(cdev, addr_offset, val, 1);
 }
 
-static void m_can_config_endisable(struct m_can_classdev *cdev, bool enable)
-{
-	u32 cccr = m_can_read(cdev, M_CAN_CCCR);
-	u32 timeout = 10;
-	u32 val = 0;
-
-	/* Clear the Clock stop request if it was set */
-	if (cccr & CCCR_CSR)
-		cccr &= ~CCCR_CSR;
-
-	if (enable) {
-		/* enable m_can configuration */
-		m_can_write(cdev, M_CAN_CCCR, cccr | CCCR_INIT);
-		udelay(5);
-		/* CCCR.CCE can only be set/reset while CCCR.INIT = '1' */
-		m_can_write(cdev, M_CAN_CCCR, cccr | CCCR_INIT | CCCR_CCE);
-	} else {
-		m_can_write(cdev, M_CAN_CCCR, cccr & ~(CCCR_INIT | CCCR_CCE));
+static int m_can_cccr_update_bits(struct m_can_classdev *cdev, u32 mask, u32 val)
+{
+	u32 val_before = m_can_read(cdev, M_CAN_CCCR);
+	u32 val_after = (val_before & ~mask) | val;
+	size_t tries = 10;
+
+	if (!(mask & CCCR_INIT) && !(val_before & CCCR_INIT)) {
+		dev_err(cdev->dev,
+			"refusing to configure device when in normal mode\n");
+		return -EBUSY;
 	}
 
-	/* there's a delay for module initialization */
-	if (enable)
-		val = CCCR_INIT | CCCR_CCE;
+	/* The chip should be in standby mode when changing the CCCR register,
+	 * and some chips set the CSR and CSA bits when in standby. Furthermore,
+	 * the CSR and CSA bits should be written as zeros, even when they read
+	 * ones.
+	 */
+	val_after &= ~(CCCR_CSR | CCCR_CSA);
 
-	while ((m_can_read(cdev, M_CAN_CCCR) & (CCCR_INIT | CCCR_CCE)) != val) {
-		if (timeout == 0) {
-			netdev_warn(cdev->net, "Failed to init module\n");
-			return;
-		}
-		timeout--;
-		udelay(1);
+	while (tries--) {
+		u32 val_read;
+
+		/* Write the desired value in each try, as setting some bits in
+		 * the CCCR register require other bits to be set first. E.g.
+		 * setting the NISO bit requires setting the CCE bit first.
+		 */
+		m_can_write(cdev, M_CAN_CCCR, val_after);
+
+		val_read = m_can_read(cdev, M_CAN_CCCR) & ~(CCCR_CSR | CCCR_CSA);
+
+		if (val_read == val_after)
+			return 0;
+
+		usleep_range(1, 5);
 	}
+
+	return -ETIMEDOUT;
+}
+
+static int m_can_config_enable(struct m_can_classdev *cdev)
+{
+	int err;
+
+	/* CCCR_INIT must be set in order to set CCCR_CCE, but access to
+	 * configuration registers should only be enabled when in standby mode,
+	 * where CCCR_INIT is always set.
+	 */
+	err = m_can_cccr_update_bits(cdev, CCCR_CCE, CCCR_CCE);
+	if (err)
+		netdev_err(cdev->net, "failed to enable configuration mode\n");
+
+	return err;
+}
+
+static int m_can_config_disable(struct m_can_classdev *cdev)
+{
+	int err;
+
+	/* Only clear CCCR_CCE, since CCCR_INIT cannot be cleared while in
+	 * standby mode
+	 */
+	err = m_can_cccr_update_bits(cdev, CCCR_CCE, 0);
+	if (err)
+		netdev_err(cdev->net, "failed to disable configuration registers\n");
+
+	return err;
 }
 
 static void m_can_interrupt_enable(struct m_can_classdev *cdev, u32 interrupts)
@@ -1403,7 +1437,9 @@ static int m_can_chip_config(struct net_device *dev)
 	interrupts &= ~(IR_ARA | IR_ELO | IR_DRX | IR_TEFF | IR_TFE | IR_TCF |
 			IR_HPM | IR_RF1F | IR_RF1W | IR_RF1N | IR_RF0F);
 
-	m_can_config_endisable(cdev, true);
+	err = m_can_config_enable(cdev);
+	if (err)
+		return err;
 
 	/* RX Buffer/FIFO Element Size 64 bytes data field */
 	m_can_write(cdev, M_CAN_RXESC,
@@ -1521,7 +1557,9 @@ static int m_can_chip_config(struct net_device *dev)
 		    FIELD_PREP(TSCC_TCP_MASK, 0xf) |
 		    FIELD_PREP(TSCC_TSS_MASK, TSCC_TSS_INTERNAL));
 
-	m_can_config_endisable(cdev, false);
+	err = m_can_config_disable(cdev);
+	if (err)
+		return err;
 
 	if (cdev->ops->init)
 		cdev->ops->init(cdev);
@@ -1550,7 +1588,11 @@ static int m_can_start(struct net_device *dev)
 		cdev->tx_fifo_putidx = FIELD_GET(TXFQS_TFQPI_MASK,
 						 m_can_read(cdev, M_CAN_TXFQS));
 
-	return 0;
+	ret = m_can_cccr_update_bits(cdev, CCCR_INIT, 0);
+	if (ret)
+		netdev_err(dev, "failed to enter normal mode\n");
+
+	return ret;
 }
 
 static int m_can_set_mode(struct net_device *dev, enum can_mode mode)
@@ -1599,43 +1641,37 @@ static int m_can_check_core_release(struct m_can_classdev *cdev)
 }
 
 /* Selectable Non ISO support only in version 3.2.x
- * This function checks if the bit is writable.
+ * Return 1 if the bit is writable, 0 if it is not, or negative on error.
  */
-static bool m_can_niso_supported(struct m_can_classdev *cdev)
+static int m_can_niso_supported(struct m_can_classdev *cdev)
 {
-	u32 cccr_reg, cccr_poll = 0;
-	int niso_timeout = -ETIMEDOUT;
-	int i;
+	int ret, niso;
 
-	m_can_config_endisable(cdev, true);
-	cccr_reg = m_can_read(cdev, M_CAN_CCCR);
-	cccr_reg |= CCCR_NISO;
-	m_can_write(cdev, M_CAN_CCCR, cccr_reg);
+	ret = m_can_config_enable(cdev);
+	if (ret)
+		return ret;
 
-	for (i = 0; i <= 10; i++) {
-		cccr_poll = m_can_read(cdev, M_CAN_CCCR);
-		if (cccr_poll == cccr_reg) {
-			niso_timeout = 0;
-			break;
-		}
+	/* First try to set the NISO bit. */
+	niso = m_can_cccr_update_bits(cdev, CCCR_NISO, CCCR_NISO);
 
-		usleep_range(1, 5);
+	/* Then clear the it again. */
+	ret = m_can_cccr_update_bits(cdev, CCCR_NISO, 0);
+	if (ret) {
+		dev_err(cdev->dev, "failed to revert the NON-ISO bit in CCCR\n");
+		return ret;
 	}
 
-	/* Clear NISO */
-	cccr_reg &= ~(CCCR_NISO);
-	m_can_write(cdev, M_CAN_CCCR, cccr_reg);
-
-	m_can_config_endisable(cdev, false);
+	ret = m_can_config_disable(cdev);
+	if (ret)
+		return ret;
 
-	/* return false if time out (-ETIMEDOUT), else return true */
-	return !niso_timeout;
+	return niso == 0;
 }
 
 static int m_can_dev_setup(struct m_can_classdev *cdev)
 {
 	struct net_device *dev = cdev->net;
-	int m_can_version, err;
+	int m_can_version, err, niso;
 
 	m_can_version = m_can_check_core_release(cdev);
 	/* return if unsupported version */
@@ -1684,9 +1720,11 @@ static int m_can_dev_setup(struct m_can_classdev *cdev)
 		cdev->can.bittiming_const = &m_can_bittiming_const_31X;
 		cdev->can.data_bittiming_const = &m_can_data_bittiming_const_31X;
 
-		cdev->can.ctrlmode_supported |=
-			(m_can_niso_supported(cdev) ?
-			 CAN_CTRLMODE_FD_NON_ISO : 0);
+		niso = m_can_niso_supported(cdev);
+		if (niso < 0)
+			return niso;
+		if (niso)
+			cdev->can.ctrlmode_supported |= CAN_CTRLMODE_FD_NON_ISO;
 		break;
 	default:
 		dev_err(cdev->dev, "Unsupported version number: %2d",
@@ -1694,21 +1732,26 @@ static int m_can_dev_setup(struct m_can_classdev *cdev)
 		return -EINVAL;
 	}
 
-	if (cdev->ops->init)
-		cdev->ops->init(cdev);
-
-	return 0;
+	/* Forcing standby mode should be redundant, as the chip should be in
+	 * standby after a reset. Write the INIT bit anyways, should the chip
+	 * be configured by previous stage.
+	 */
+	return m_can_cccr_update_bits(cdev, CCCR_INIT, CCCR_INIT);
 }
 
 static void m_can_stop(struct net_device *dev)
 {
 	struct m_can_classdev *cdev = netdev_priv(dev);
+	int ret;
 
 	/* disable all interrupts */
 	m_can_disable_all_interrupts(cdev);
 
 	/* Set init mode to disengage from the network */
-	m_can_config_endisable(cdev, true);
+	ret = m_can_cccr_update_bits(cdev, CCCR_INIT, CCCR_INIT);
+	if (ret)
+		netdev_err(dev, "failed to enter standby mode: %pe\n",
+			   ERR_PTR(ret));
 
 	/* set the state as STOPPED */
 	cdev->can.state = CAN_STATE_STOPPED;

drivers/net/can/m_can/tcan4x5x-core.c

@@ -453,10 +453,17 @@ static int tcan4x5x_can_probe(struct spi_device *spi)
 		goto out_power;
 	}
 
-	ret = tcan4x5x_init(mcan_class);
+	tcan4x5x_check_wake(priv);
+
+	ret = tcan4x5x_write_tcan_reg(mcan_class, TCAN4X5X_INT_EN, 0);
 	if (ret) {
-		dev_err(&spi->dev, "tcan initialization failed %pe\n",
-			ERR_PTR(ret));
+		dev_err(&spi->dev, "Disabling interrupts failed %pe\n", ERR_PTR(ret));
+		goto out_power;
+	}
+
+	ret = tcan4x5x_clear_interrupts(mcan_class);
+	if (ret) {
+		dev_err(&spi->dev, "Clearing interrupts failed %pe\n", ERR_PTR(ret));
 		goto out_power;
 	}
 

drivers/net/can/mscan/mscan.c

@@ -34,12 +34,6 @@ static const struct can_bittiming_const mscan_bittiming_const = {
 	.brp_inc = 1,
 };
 
-struct mscan_state {
-	u8 mode;
-	u8 canrier;
-	u8 cantier;
-};
-
 static enum can_state state_map[] = {
 	CAN_STATE_ERROR_ACTIVE,
 	CAN_STATE_ERROR_WARNING,

drivers/net/can/sja1000/plx_pci.c

@@ -122,7 +122,6 @@ struct plx_pci_card {
 #define TEWS_PCI_VENDOR_ID		0x1498
 #define TEWS_PCI_DEVICE_ID_TMPC810	0x032A
 
-#define CTI_PCI_VENDOR_ID		0x12c4
 #define CTI_PCI_DEVICE_ID_CRG001	0x0900
 
 #define MOXA_PCI_VENDOR_ID		0x1393
@@ -358,7 +357,7 @@ static const struct pci_device_id plx_pci_tbl[] = {
 	{
 		/* Connect Tech Inc. CANpro/104-Plus Opto (CRG001) card */
 		PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9030,
-		CTI_PCI_VENDOR_ID, CTI_PCI_DEVICE_ID_CRG001,
+		PCI_SUBVENDOR_ID_CONNECT_TECH, CTI_PCI_DEVICE_ID_CRG001,
 		0, 0,
 		(kernel_ulong_t)&plx_pci_card_info_cti
 	},

drivers/net/can/spi/hi311x.c

@@ -830,7 +830,6 @@ static int hi3110_can_probe(struct spi_device *spi)
 	struct device *dev = &spi->dev;
 	struct net_device *net;
 	struct hi3110_priv *priv;
-	const void *match;
 	struct clk *clk;
 	u32 freq;
 	int ret;
@@ -874,11 +873,7 @@ static int hi3110_can_probe(struct spi_device *spi)
 		CAN_CTRLMODE_LISTENONLY |
 		CAN_CTRLMODE_BERR_REPORTING;
 
-	match = device_get_match_data(dev);
-	if (match)
-		priv->model = (enum hi3110_model)(uintptr_t)match;
-	else
-		priv->model = spi_get_device_id(spi)->driver_data;
+	priv->model = (enum hi3110_model)(uintptr_t)spi_get_device_match_data(spi);
 	priv->net = net;
 	priv->clk = clk;
 

drivers/net/can/spi/mcp251x.c

@@ -28,7 +28,6 @@
 #include <linux/device.h>
 #include <linux/ethtool.h>
 #include <linux/freezer.h>
-#include <linux/gpio.h>
 #include <linux/gpio/driver.h>
 #include <linux/interrupt.h>
 #include <linux/io.h>
@@ -482,9 +481,9 @@ static int mcp251x_gpio_get_direction(struct gpio_chip *chip,
 				      unsigned int offset)
 {
 	if (mcp251x_gpio_is_input(offset))
-		return GPIOF_DIR_IN;
+		return GPIO_LINE_DIRECTION_IN;
 
-	return GPIOF_DIR_OUT;
+	return GPIO_LINE_DIRECTION_OUT;
 }
 
 static int mcp251x_gpio_get(struct gpio_chip *chip, unsigned int offset)
@@ -1301,7 +1300,6 @@ MODULE_DEVICE_TABLE(spi, mcp251x_id_table);
 
 static int mcp251x_can_probe(struct spi_device *spi)
 {
-	const void *match = device_get_match_data(&spi->dev);
 	struct net_device *net;
 	struct mcp251x_priv *priv;
 	struct clk *clk;
@@ -1339,10 +1337,7 @@ static int mcp251x_can_probe(struct spi_device *spi)
 	priv->can.clock.freq = freq / 2;
 	priv->can.ctrlmode_supported = CAN_CTRLMODE_3_SAMPLES |
 		CAN_CTRLMODE_LOOPBACK | CAN_CTRLMODE_LISTENONLY;
-	if (match)
-		priv->model = (enum mcp251x_model)(uintptr_t)match;
-	else
-		priv->model = spi_get_device_id(spi)->driver_data;
+	priv->model = (enum mcp251x_model)(uintptr_t)spi_get_device_match_data(spi);
 	priv->net = net;
 	priv->clk = clk;
 

drivers/net/can/spi/mcp251xfd/mcp251xfd-core.c

@@ -1989,7 +1989,6 @@ MODULE_DEVICE_TABLE(spi, mcp251xfd_id_table);
 
 static int mcp251xfd_probe(struct spi_device *spi)
 {
-	const void *match;
 	struct net_device *ndev;
 	struct mcp251xfd_priv *priv;
 	struct gpio_desc *rx_int;
@@ -2081,13 +2080,7 @@ static int mcp251xfd_probe(struct spi_device *spi)
 	priv->pll_enable = pll_enable;
 	priv->reg_vdd = reg_vdd;
 	priv->reg_xceiver = reg_xceiver;
-
-	match = device_get_match_data(&spi->dev);
-	if (match)
-		priv->devtype_data = *(struct mcp251xfd_devtype_data *)match;
-	else
-		priv->devtype_data = *(struct mcp251xfd_devtype_data *)
-			spi_get_device_id(spi)->driver_data;
+	priv->devtype_data = *(struct mcp251xfd_devtype_data *)spi_get_device_match_data(spi);
 
 	/* Errata Reference:
 	 * mcp2517fd: DS80000792C 5., mcp2518fd: DS80000789C 4.

drivers/net/can/usb/Kconfig

@@ -91,6 +91,7 @@ config CAN_KVASER_USB
 	    - Kvaser Leaf Light R v2
 	    - Kvaser Mini PCI Express HS
 	    - Kvaser Mini PCI Express 2xHS
+	    - Kvaser Mini PCIe 1xCAN
 	    - Kvaser USBcan Light 2xHS
 	    - Kvaser USBcan II HS/HS
 	    - Kvaser USBcan II HS/LS
@@ -111,12 +112,14 @@ config CAN_KVASER_USB
 	    - Kvaser USBcan Light 4xHS
 	    - Kvaser USBcan Pro 2xHS v2
 	    - Kvaser USBcan Pro 4xHS
+	    - Kvaser USBcan Pro 5xCAN
 	    - Kvaser USBcan Pro 5xHS
 	    - Kvaser U100
 	    - Kvaser U100P
 	    - Kvaser U100S
 	    - ATI Memorator Pro 2xHS v2
 	    - ATI USBcan Pro 2xHS v2
+	    - Vining 800
 
 	  If unsure, say N.
 

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

@@ -89,6 +89,9 @@
 #define USB_HYBRID_CANLIN_PRODUCT_ID 0x0115
 #define USB_HYBRID_PRO_CANLIN_PRODUCT_ID 0x0116
 #define USB_LEAF_V3_PRODUCT_ID 0x0117
+#define USB_VINING_800_PRODUCT_ID 0x0119
+#define USB_USBCAN_PRO_5XCAN_PRODUCT_ID 0x011A
+#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,
@@ -238,6 +241,12 @@ static const struct usb_device_id kvaser_usb_table[] = {
 		.driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
 	{ USB_DEVICE(KVASER_VENDOR_ID, USB_LEAF_V3_PRODUCT_ID),
 		.driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
+	{ USB_DEVICE(KVASER_VENDOR_ID, USB_VINING_800_PRODUCT_ID),
+		.driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
+	{ USB_DEVICE(KVASER_VENDOR_ID, USB_USBCAN_PRO_5XCAN_PRODUCT_ID),
+		.driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
+	{ USB_DEVICE(KVASER_VENDOR_ID, USB_MINI_PCIE_1XCAN_PRODUCT_ID),
+		.driver_info = (kernel_ulong_t)&kvaser_usb_driver_info_hydra },
 	{ }
 };
 MODULE_DEVICE_TABLE(usb, kvaser_usb_table);

drivers/net/can/xilinx_can.c

@@ -6,7 +6,7 @@
  * Copyright (C) 2017 - 2018 Sandvik Mining and Construction Oy
  *
  * Description:
- * This driver is developed for Axi CAN IP and for Zynq CANPS Controller.
+ * This driver is developed for AXI CAN IP, AXI CANFD IP, CANPS and CANFD PS Controller.
  */
 
 #include <linux/bitfield.h>

include/uapi/linux/can/isotp.h

@@ -2,7 +2,7 @@
 /*
  * linux/can/isotp.h
  *
- * Definitions for isotp CAN sockets (ISO 15765-2:2016)
+ * Definitions for ISO 15765-2 CAN transport protocol sockets
  *
  * Copyright (c) 2020 Volkswagen Group Electronic Research
  * All rights reserved.

net/can/Kconfig

@@ -56,18 +56,17 @@ config CAN_GW
 source "net/can/j1939/Kconfig"
 
 config CAN_ISOTP
-	tristate "ISO 15765-2:2016 CAN transport protocol"
+	tristate "ISO 15765-2 CAN transport protocol"
 	help
 	  CAN Transport Protocols offer support for segmented Point-to-Point
 	  communication between CAN nodes via two defined CAN Identifiers.
+	  This protocol driver implements segmented data transfers for CAN CC
+	  (aka Classical CAN, CAN 2.0B) and CAN FD frame types which were
+	  introduced with ISO 15765-2:2016.
 	  As CAN frames can only transport a small amount of data bytes
-	  (max. 8 bytes for 'classic' CAN and max. 64 bytes for CAN FD) this
+	  (max. 8 bytes for CAN CC and max. 64 bytes for CAN FD) this
 	  segmentation is needed to transport longer Protocol Data Units (PDU)
 	  as needed e.g. for vehicle diagnosis (UDS, ISO 14229) or IP-over-CAN
 	  traffic.
-	  This protocol driver implements data transfers according to
-	  ISO 15765-2:2016 for 'classic' CAN and CAN FD frame types.
-	  If you want to perform automotive vehicle diagnostic services (UDS),
-	  say 'y'.
 
 endif

net/can/isotp.c

@@ -72,7 +72,7 @@
 #include <net/sock.h>
 #include <net/net_namespace.h>
 
-MODULE_DESCRIPTION("PF_CAN isotp 15765-2:2016 protocol");
+MODULE_DESCRIPTION("PF_CAN ISO 15765-2 transport protocol");
 MODULE_LICENSE("Dual BSD/GPL");
 MODULE_AUTHOR("Oliver Hartkopp <socketcan@hartkopp.net>");
 MODULE_ALIAS("can-proto-6");
@@ -83,10 +83,11 @@ MODULE_ALIAS("can-proto-6");
 			 (CAN_EFF_MASK | CAN_EFF_FLAG | CAN_RTR_FLAG) : \
 			 (CAN_SFF_MASK | CAN_EFF_FLAG | CAN_RTR_FLAG))
 
-/* ISO 15765-2:2016 supports more than 4095 byte per ISO PDU as the FF_DL can
- * take full 32 bit values (4 Gbyte). We would need some good concept to handle
- * this between user space and kernel space. For now set the static buffer to
- * something about 8 kbyte to be able to test this new functionality.
+/* Since ISO 15765-2:2016 the CAN isotp protocol supports more than 4095
+ * byte per ISO PDU as the FF_DL can take full 32 bit values (4 Gbyte).
+ * We would need some good concept to handle this between user space and
+ * kernel space. For now set the static buffer to something about 8 kbyte
+ * to be able to test this new functionality.
  */
 #define DEFAULT_MAX_PDU_SIZE 8300