Merge tag 'linux-can-next-for-5.15-20210725' of...

Merge tag 'linux-can-next-for-5.15-20210725' of git://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next

linux-can-next-for-5.15-20210725

Marc Kleine-Budde says:

====================
pull-request: can-next 2021-07-25

this is a pull request of 46 patches for net-next/master.

The first 6 patches target the CAN J1939 protocol. One is from
gushengxian, fixing a grammatical error, 5 are by me fixing a checkpatch
warning, make use of the fallthrough pseudo-keyword, and use
consistent variable naming.

The next 3 patches target the rx-offload helper, are by me and improve
the performance and fix the local softirq work pending error, when
napi_schedule() is called from threaded IRQ context.

The next 3 patches are by Vincent Mailhol and me update the CAN
bittiming and transmitter delay compensation, the documentation for
the struct can_tdc is fixed, clear data_bittiming if FD mode is turned
off and a redundant check is removed.

Followed by 4 patches targeting the m_can driver. Faiz Abbas's patches
add support for CAN PHY via the generic phy subsystem. Yang Yingliang
converts the driver to use devm_platform_ioremap_resource_byname().
And a patch by me which removes the unused support for custom bit
timing.

Andy Shevchenko contributes 2 patches for the mcp251xfd driver to
prepare the driver for ACPI support. A patch by me adds support for
shared IRQ handlers.

Zhen Lei contributes 3 patches to convert the esd_usb2, janz-ican3 and
the at91_can driver to make use of the DEVICE_ATTR_RO/RW() macros.

The next 8 patches are by Peng Li and provide general cleanups for the
at91_can driver.

The next 7 patches target the peak driver. Frist 2 cleanup patches by
me for the peak_pci driver, followed by Stephane Grosjean' patch to
print the name and firmware version of the detected hardware. The
peak_usb driver gets a cleanup patch, loopback and one-shot mode and
an upgrading of the bus state change handling in Stephane Grosjean's
patches.

Vincent Mailhol provides 6 cleanup patches for the etas_es58x driver.

In the last 3 patches Angelo Dureghello add support for the mcf5441x
SoC to the flexcan driver.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>

Documentation/devicetree/bindings/net/can/bosch,m_can.yaml

@@ -107,6 +107,9 @@ properties:
   can-transceiver:
     $ref: can-transceiver.yaml#
 
+  phys:
+    maxItems: 1
+
 required:
   - compatible
   - reg

drivers/net/can/Kconfig

@@ -97,7 +97,8 @@ config CAN_AT91
 
 config CAN_FLEXCAN
 	tristate "Support for Freescale FLEXCAN based chips"
-	depends on OF && HAS_IOMEM
+	depends on OF || COLDFIRE || COMPILE_TEST
+	depends on HAS_IOMEM
 	help
 	  Say Y here if you want to support for Freescale FlexCAN.
 

drivers/net/can/dev/netlink.c

@@ -47,7 +47,7 @@ static int can_validate(struct nlattr *tb[], struct nlattr *data[],
 	}
 
 	if (data[IFLA_CAN_DATA_BITTIMING]) {
-		if (!is_can_fd || !data[IFLA_CAN_BITTIMING])
+		if (!is_can_fd)
 			return -EOPNOTSUPP;
 	}
 
@@ -132,10 +132,13 @@ static int can_changelink(struct net_device *dev, struct nlattr *tb[],
 		priv->ctrlmode |= maskedflags;
 
 		/* CAN_CTRLMODE_FD can only be set when driver supports FD */
-		if (priv->ctrlmode & CAN_CTRLMODE_FD)
+		if (priv->ctrlmode & CAN_CTRLMODE_FD) {
 			dev->mtu = CANFD_MTU;
-		else
+		} else {
 			dev->mtu = CAN_MTU;
+			memset(&priv->data_bittiming, 0,
+			       sizeof(priv->data_bittiming));
+		}
 	}
 
 	if (data[IFLA_CAN_RESTART_MS]) {

drivers/net/can/dev/rx-offload.c

 // SPDX-License-Identifier: GPL-2.0-only
 /* Copyright (c) 2014      Protonic Holland,
  *                         David Jander
- * Copyright (C) 2014-2017 Pengutronix,
+ * Copyright (C) 2014-2021 Pengutronix,
  *                         Marc Kleine-Budde <kernel@pengutronix.de>
  */
 
@@ -174,10 +174,8 @@ can_rx_offload_offload_one(struct can_rx_offload *offload, unsigned int n)
 int can_rx_offload_irq_offload_timestamp(struct can_rx_offload *offload,
 					 u64 pending)
 {
-	struct sk_buff_head skb_queue;
 	unsigned int i;
-
-	__skb_queue_head_init(&skb_queue);
+	int received = 0;
 
 	for (i = offload->mb_first;
 	     can_rx_offload_le(offload, i, offload->mb_last);
@@ -191,26 +189,12 @@ int can_rx_offload_irq_offload_timestamp(struct can_rx_offload *offload,
 		if (IS_ERR_OR_NULL(skb))
 			continue;
 
-		__skb_queue_add_sort(&skb_queue, skb, can_rx_offload_compare);
-	}
-
-	if (!skb_queue_empty(&skb_queue)) {
-		unsigned long flags;
-		u32 queue_len;
-
-		spin_lock_irqsave(&offload->skb_queue.lock, flags);
-		skb_queue_splice_tail(&skb_queue, &offload->skb_queue);
-		spin_unlock_irqrestore(&offload->skb_queue.lock, flags);
-
-		queue_len = skb_queue_len(&offload->skb_queue);
-		if (queue_len > offload->skb_queue_len_max / 8)
-			netdev_dbg(offload->dev, "%s: queue_len=%d\n",
-				   __func__, queue_len);
-
-		can_rx_offload_schedule(offload);
+		__skb_queue_add_sort(&offload->skb_irq_queue, skb,
+				     can_rx_offload_compare);
+		received++;
 	}
 
-	return skb_queue_len(&skb_queue);
+	return received;
 }
 EXPORT_SYMBOL_GPL(can_rx_offload_irq_offload_timestamp);
 
@@ -226,13 +210,10 @@ int can_rx_offload_irq_offload_fifo(struct can_rx_offload *offload)
 		if (!skb)
 			break;
 
-		skb_queue_tail(&offload->skb_queue, skb);
+		__skb_queue_tail(&offload->skb_irq_queue, skb);
 		received++;
 	}
 
-	if (received)
-		can_rx_offload_schedule(offload);
-
 	return received;
 }
 EXPORT_SYMBOL_GPL(can_rx_offload_irq_offload_fifo);
@@ -241,7 +222,6 @@ int can_rx_offload_queue_sorted(struct can_rx_offload *offload,
 				struct sk_buff *skb, u32 timestamp)
 {
 	struct can_rx_offload_cb *cb;
-	unsigned long flags;
 
 	if (skb_queue_len(&offload->skb_queue) >
 	    offload->skb_queue_len_max) {
@@ -252,11 +232,8 @@ int can_rx_offload_queue_sorted(struct can_rx_offload *offload,
 	cb = can_rx_offload_get_cb(skb);
 	cb->timestamp = timestamp;
 
-	spin_lock_irqsave(&offload->skb_queue.lock, flags);
-	__skb_queue_add_sort(&offload->skb_queue, skb, can_rx_offload_compare);
-	spin_unlock_irqrestore(&offload->skb_queue.lock, flags);
-
-	can_rx_offload_schedule(offload);
+	__skb_queue_add_sort(&offload->skb_irq_queue, skb,
+			     can_rx_offload_compare);
 
 	return 0;
 }
@@ -295,13 +272,56 @@ int can_rx_offload_queue_tail(struct can_rx_offload *offload,
 		return -ENOBUFS;
 	}
 
-	skb_queue_tail(&offload->skb_queue, skb);
-	can_rx_offload_schedule(offload);
+	__skb_queue_tail(&offload->skb_irq_queue, skb);
 
 	return 0;
 }
 EXPORT_SYMBOL_GPL(can_rx_offload_queue_tail);
 
+void can_rx_offload_irq_finish(struct can_rx_offload *offload)
+{
+	unsigned long flags;
+	int queue_len;
+
+	if (skb_queue_empty_lockless(&offload->skb_irq_queue))
+		return;
+
+	spin_lock_irqsave(&offload->skb_queue.lock, flags);
+	skb_queue_splice_tail_init(&offload->skb_irq_queue, &offload->skb_queue);
+	spin_unlock_irqrestore(&offload->skb_queue.lock, flags);
+
+	queue_len = skb_queue_len(&offload->skb_queue);
+	if (queue_len > offload->skb_queue_len_max / 8)
+		netdev_dbg(offload->dev, "%s: queue_len=%d\n",
+			   __func__, queue_len);
+
+	napi_schedule(&offload->napi);
+}
+EXPORT_SYMBOL_GPL(can_rx_offload_irq_finish);
+
+void can_rx_offload_threaded_irq_finish(struct can_rx_offload *offload)
+{
+	unsigned long flags;
+	int queue_len;
+
+	if (skb_queue_empty_lockless(&offload->skb_irq_queue))
+		return;
+
+	spin_lock_irqsave(&offload->skb_queue.lock, flags);
+	skb_queue_splice_tail_init(&offload->skb_irq_queue, &offload->skb_queue);
+	spin_unlock_irqrestore(&offload->skb_queue.lock, flags);
+
+	queue_len = skb_queue_len(&offload->skb_queue);
+	if (queue_len > offload->skb_queue_len_max / 8)
+		netdev_dbg(offload->dev, "%s: queue_len=%d\n",
+			   __func__, queue_len);
+
+	local_bh_disable();
+	napi_schedule(&offload->napi);
+	local_bh_enable();
+}
+EXPORT_SYMBOL_GPL(can_rx_offload_threaded_irq_finish);
+
 static int can_rx_offload_init_queue(struct net_device *dev,
 				     struct can_rx_offload *offload,
 				     unsigned int weight)
@@ -312,6 +332,7 @@ static int can_rx_offload_init_queue(struct net_device *dev,
 	offload->skb_queue_len_max = 2 << fls(weight);
 	offload->skb_queue_len_max *= 4;
 	skb_queue_head_init(&offload->skb_queue);
+	__skb_queue_head_init(&offload->skb_irq_queue);
 
 	netif_napi_add(dev, &offload->napi, can_rx_offload_napi_poll, weight);
 
@@ -373,5 +394,6 @@ void can_rx_offload_del(struct can_rx_offload *offload)
 {
 	netif_napi_del(&offload->napi);
 	skb_queue_purge(&offload->skb_queue);
+	__skb_queue_purge(&offload->skb_irq_queue);
 }
 EXPORT_SYMBOL_GPL(can_rx_offload_del);

drivers/net/can/flexcan.c

@@ -28,6 +28,7 @@
 #include <linux/of_device.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/platform_device.h>
+#include <linux/can/platform/flexcan.h>
 #include <linux/pm_runtime.h>
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
@@ -208,18 +209,19 @@
 /* FLEXCAN hardware feature flags
  *
  * Below is some version info we got:
- *    SOC   Version   IP-Version  Glitch- [TR]WRN_INT IRQ Err Memory err RTR rece-   FD Mode
+ *    SOC   Version   IP-Version  Glitch- [TR]WRN_INT IRQ Err Memory err RTR rece-   FD Mode     MB
  *                                Filter? connected?  Passive detection  ption in MB Supported?
- *   MX25  FlexCAN2  03.00.00.00     no        no        no       no        no           no
- *   MX28  FlexCAN2  03.00.04.00    yes       yes        no       no        no           no
- *   MX35  FlexCAN2  03.00.00.00     no        no        no       no        no           no
- *   MX53  FlexCAN2  03.00.00.00    yes        no        no       no        no           no
- *   MX6s  FlexCAN3  10.00.12.00    yes       yes        no       no       yes           no
- *   MX8QM FlexCAN3  03.00.23.00    yes       yes        no       no       yes          yes
- *   MX8MP FlexCAN3  03.00.17.01    yes       yes        no      yes       yes          yes
- *   VF610 FlexCAN3  ?               no       yes        no      yes       yes?          no
- * LS1021A FlexCAN2  03.00.04.00     no       yes        no       no       yes           no
- * LX2160A FlexCAN3  03.00.23.00     no       yes        no      yes       yes          yes
+ * MCF5441X FlexCAN2  ?               no       yes        no       no       yes           no     16
+ *    MX25  FlexCAN2  03.00.00.00     no        no        no       no        no           no     64
+ *    MX28  FlexCAN2  03.00.04.00    yes       yes        no       no        no           no     64
+ *    MX35  FlexCAN2  03.00.00.00     no        no        no       no        no           no     64
+ *    MX53  FlexCAN2  03.00.00.00    yes        no        no       no        no           no     64
+ *    MX6s  FlexCAN3  10.00.12.00    yes       yes        no       no       yes           no     64
+ *    MX8QM FlexCAN3  03.00.23.00    yes       yes        no       no       yes          yes     64
+ *    MX8MP FlexCAN3  03.00.17.01    yes       yes        no      yes       yes          yes     64
+ *    VF610 FlexCAN3  ?               no       yes        no      yes       yes?          no     64
+ *  LS1021A FlexCAN2  03.00.04.00     no       yes        no       no       yes           no     64
+ *  LX2160A FlexCAN3  03.00.23.00     no       yes        no      yes       yes          yes     64
  *
  * Some SOCs do not have the RX_WARN & TX_WARN interrupt line connected.
  */
@@ -246,6 +248,10 @@
 #define FLEXCAN_QUIRK_SUPPORT_ECC BIT(10)
 /* Setup stop mode with SCU firmware to support wakeup */
 #define FLEXCAN_QUIRK_SETUP_STOP_MODE_SCFW BIT(11)
+/* Setup 3 separate interrupts, main, boff and err */
+#define FLEXCAN_QUIRK_NR_IRQ_3 BIT(12)
+/* Setup 16 mailboxes */
+#define FLEXCAN_QUIRK_NR_MB_16 BIT(13)
 
 /* Structure of the message buffer */
 struct flexcan_mb {
@@ -363,6 +369,9 @@ struct flexcan_priv {
 	struct regulator *reg_xceiver;
 	struct flexcan_stop_mode stm;
 
+	int irq_boff;
+	int irq_err;
+
 	/* IPC handle when setup stop mode by System Controller firmware(scfw) */
 	struct imx_sc_ipc *sc_ipc_handle;
 
@@ -371,6 +380,11 @@ struct flexcan_priv {
 	void (*write)(u32 val, void __iomem *addr);
 };
 
+static const struct flexcan_devtype_data fsl_mcf5441x_devtype_data = {
+	.quirks = FLEXCAN_QUIRK_BROKEN_PERR_STATE |
+		FLEXCAN_QUIRK_NR_IRQ_3 | FLEXCAN_QUIRK_NR_MB_16,
+};
+
 static const struct flexcan_devtype_data fsl_p1010_devtype_data = {
 	.quirks = FLEXCAN_QUIRK_BROKEN_WERR_STATE |
 		FLEXCAN_QUIRK_BROKEN_PERR_STATE |
@@ -637,13 +651,17 @@ static int flexcan_clks_enable(const struct flexcan_priv *priv)
 {
 	int err;
 
-	err = clk_prepare_enable(priv->clk_ipg);
-	if (err)
-		return err;
+	if (priv->clk_ipg) {
+		err = clk_prepare_enable(priv->clk_ipg);
+		if (err)
+			return err;
+	}
 
-	err = clk_prepare_enable(priv->clk_per);
-	if (err)
-		clk_disable_unprepare(priv->clk_ipg);
+	if (priv->clk_per) {
+		err = clk_prepare_enable(priv->clk_per);
+		if (err)
+			clk_disable_unprepare(priv->clk_ipg);
+	}
 
 	return err;
 }
@@ -1198,6 +1216,9 @@ static irqreturn_t flexcan_irq(int irq, void *dev_id)
 		}
 	}
 
+	if (handled)
+		can_rx_offload_irq_finish(&priv->offload);
+
 	return handled;
 }
 
@@ -1401,8 +1422,12 @@ static int flexcan_rx_offload_setup(struct net_device *dev)
 		priv->mb_size = sizeof(struct flexcan_mb) + CANFD_MAX_DLEN;
 	else
 		priv->mb_size = sizeof(struct flexcan_mb) + CAN_MAX_DLEN;
-	priv->mb_count = (sizeof(priv->regs->mb[0]) / priv->mb_size) +
-			 (sizeof(priv->regs->mb[1]) / priv->mb_size);
+
+	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_NR_MB_16)
+		priv->mb_count = 16;
+	else
+		priv->mb_count = (sizeof(priv->regs->mb[0]) / priv->mb_size) +
+				 (sizeof(priv->regs->mb[1]) / priv->mb_size);
 
 	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP)
 		priv->tx_mb_reserved =
@@ -1774,6 +1799,18 @@ static int flexcan_open(struct net_device *dev)
 	if (err)
 		goto out_can_rx_offload_disable;
 
+	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_NR_IRQ_3) {
+		err = request_irq(priv->irq_boff,
+				  flexcan_irq, IRQF_SHARED, dev->name, dev);
+		if (err)
+			goto out_free_irq;
+
+		err = request_irq(priv->irq_err,
+				  flexcan_irq, IRQF_SHARED, dev->name, dev);
+		if (err)
+			goto out_free_irq_boff;
+	}
+
 	flexcan_chip_interrupts_enable(dev);
 
 	can_led_event(dev, CAN_LED_EVENT_OPEN);
@@ -1782,6 +1819,10 @@ static int flexcan_open(struct net_device *dev)
 
 	return 0;
 
+ out_free_irq_boff:
+	free_irq(priv->irq_boff, dev);
+ out_free_irq:
+	free_irq(dev->irq, dev);
  out_can_rx_offload_disable:
 	can_rx_offload_disable(&priv->offload);
 	flexcan_chip_stop(dev);
@@ -1803,6 +1844,12 @@ static int flexcan_close(struct net_device *dev)
 
 	netif_stop_queue(dev);
 	flexcan_chip_interrupts_disable(dev);
+
+	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_NR_IRQ_3) {
+		free_irq(priv->irq_err, dev);
+		free_irq(priv->irq_boff, dev);
+	}
+
 	free_irq(dev->irq, dev);
 	can_rx_offload_disable(&priv->offload);
 	flexcan_chip_stop_disable_on_error(dev);
@@ -2039,14 +2086,26 @@ static const struct of_device_id flexcan_of_match[] = {
 };
 MODULE_DEVICE_TABLE(of, flexcan_of_match);
 
+static const struct platform_device_id flexcan_id_table[] = {
+	{
+		.name = "flexcan-mcf5441x",
+		.driver_data = (kernel_ulong_t)&fsl_mcf5441x_devtype_data,
+	}, {
+		/* sentinel */
+	},
+};
+MODULE_DEVICE_TABLE(platform, flexcan_id_table);
+
 static int flexcan_probe(struct platform_device *pdev)
 {
+	const struct of_device_id *of_id;
 	const struct flexcan_devtype_data *devtype_data;
 	struct net_device *dev;
 	struct flexcan_priv *priv;
 	struct regulator *reg_xceiver;
 	struct clk *clk_ipg = NULL, *clk_per = NULL;
 	struct flexcan_regs __iomem *regs;
+	struct flexcan_platform_data *pdata;
 	int err, irq;
 	u8 clk_src = 1;
 	u32 clock_freq = 0;
@@ -2064,6 +2123,12 @@ static int flexcan_probe(struct platform_device *pdev)
 				     "clock-frequency", &clock_freq);
 		of_property_read_u8(pdev->dev.of_node,
 				    "fsl,clk-source", &clk_src);
+	} else {
+		pdata = dev_get_platdata(&pdev->dev);
+		if (pdata) {
+			clock_freq = pdata->clock_frequency;
+			clk_src = pdata->clk_src;
+		}
 	}
 
 	if (!clock_freq) {
@@ -2089,7 +2154,14 @@ static int flexcan_probe(struct platform_device *pdev)
 	if (IS_ERR(regs))
 		return PTR_ERR(regs);
 
-	devtype_data = of_device_get_match_data(&pdev->dev);
+	of_id = of_match_device(flexcan_of_match, &pdev->dev);
+	if (of_id)
+		devtype_data = of_id->data;
+	else if (platform_get_device_id(pdev)->driver_data)
+		devtype_data = (struct flexcan_devtype_data *)
+			platform_get_device_id(pdev)->driver_data;
+	else
+		return -ENODEV;
 
 	if ((devtype_data->quirks & FLEXCAN_QUIRK_SUPPORT_FD) &&
 	    !(devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP)) {
@@ -2133,6 +2205,19 @@ static int flexcan_probe(struct platform_device *pdev)
 	priv->devtype_data = devtype_data;
 	priv->reg_xceiver = reg_xceiver;
 
+	if (devtype_data->quirks & FLEXCAN_QUIRK_NR_IRQ_3) {
+		priv->irq_boff = platform_get_irq(pdev, 1);
+		if (priv->irq_boff <= 0) {
+			err = -ENODEV;
+			goto failed_platform_get_irq;
+		}
+		priv->irq_err = platform_get_irq(pdev, 2);
+		if (priv->irq_err <= 0) {
+			err = -ENODEV;
+			goto failed_platform_get_irq;
+		}
+	}
+
 	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_SUPPORT_FD) {
 		priv->can.ctrlmode_supported |= CAN_CTRLMODE_FD |
 			CAN_CTRLMODE_FD_NON_ISO;
@@ -2170,6 +2255,7 @@ static int flexcan_probe(struct platform_device *pdev)
  failed_register:
 	pm_runtime_put_noidle(&pdev->dev);
 	pm_runtime_disable(&pdev->dev);
+ failed_platform_get_irq:
 	free_candev(dev);
 	return err;
 }
@@ -2322,6 +2408,7 @@ static struct platform_driver flexcan_driver = {
 	},
 	.probe = flexcan_probe,
 	.remove = flexcan_remove,
+	.id_table = flexcan_id_table,
 };
 
 module_platform_driver(flexcan_driver);

drivers/net/can/janz-ican3.c

@@ -1815,9 +1815,9 @@ static int ican3_get_berr_counter(const struct net_device *ndev,
  * Sysfs Attributes
  */
 
-static ssize_t ican3_sysfs_show_term(struct device *dev,
-				     struct device_attribute *attr,
-				     char *buf)
+static ssize_t termination_show(struct device *dev,
+				struct device_attribute *attr,
+				char *buf)
 {
 	struct ican3_dev *mod = netdev_priv(to_net_dev(dev));
 	int ret;
@@ -1834,9 +1834,9 @@ static ssize_t ican3_sysfs_show_term(struct device *dev,
 	return snprintf(buf, PAGE_SIZE, "%u\n", mod->termination_enabled);
 }
 
-static ssize_t ican3_sysfs_set_term(struct device *dev,
-				    struct device_attribute *attr,
-				    const char *buf, size_t count)
+static ssize_t termination_store(struct device *dev,
+				 struct device_attribute *attr,
+				 const char *buf, size_t count)
 {
 	struct ican3_dev *mod = netdev_priv(to_net_dev(dev));
 	unsigned long enable;
@@ -1852,18 +1852,17 @@ static ssize_t ican3_sysfs_set_term(struct device *dev,
 	return count;
 }
 
-static ssize_t ican3_sysfs_show_fwinfo(struct device *dev,
-				       struct device_attribute *attr,
-				       char *buf)
+static ssize_t fwinfo_show(struct device *dev,
+			   struct device_attribute *attr,
+			   char *buf)
 {
 	struct ican3_dev *mod = netdev_priv(to_net_dev(dev));
 
 	return scnprintf(buf, PAGE_SIZE, "%s\n", mod->fwinfo);
 }
 
-static DEVICE_ATTR(termination, 0644, ican3_sysfs_show_term,
-		   ican3_sysfs_set_term);
-static DEVICE_ATTR(fwinfo, 0444, ican3_sysfs_show_fwinfo, NULL);
+static DEVICE_ATTR_RW(termination);
+static DEVICE_ATTR_RO(fwinfo);
 
 static struct attribute *ican3_sysfs_attrs[] = {
 	&dev_attr_termination.attr,

drivers/net/can/m_can/m_can.c

@@ -21,6 +21,7 @@
 #include <linux/iopoll.h>
 #include <linux/can/dev.h>
 #include <linux/pinctrl/consumer.h>
+#include <linux/phy/phy.h>
 
 #include "m_can.h"
 
@@ -1058,6 +1059,9 @@ static irqreturn_t m_can_isr(int irq, void *dev_id)
 		}
 	}
 
+	if (cdev->is_peripheral)
+		can_rx_offload_threaded_irq_finish(&cdev->offload);
+
 	return IRQ_HANDLED;
 }
 
@@ -1436,32 +1440,20 @@ static int m_can_dev_setup(struct m_can_classdev *cdev)
 	case 30:
 		/* CAN_CTRLMODE_FD_NON_ISO is fixed with M_CAN IP v3.0.x */
 		can_set_static_ctrlmode(dev, CAN_CTRLMODE_FD_NON_ISO);
-		cdev->can.bittiming_const = cdev->bit_timing ?
-			cdev->bit_timing : &m_can_bittiming_const_30X;
-
-		cdev->can.data_bittiming_const = cdev->data_timing ?
-			cdev->data_timing :
-			&m_can_data_bittiming_const_30X;
+		cdev->can.bittiming_const = &m_can_bittiming_const_30X;
+		cdev->can.data_bittiming_const = &m_can_data_bittiming_const_30X;
 		break;
 	case 31:
 		/* CAN_CTRLMODE_FD_NON_ISO is fixed with M_CAN IP v3.1.x */
 		can_set_static_ctrlmode(dev, CAN_CTRLMODE_FD_NON_ISO);
-		cdev->can.bittiming_const = cdev->bit_timing ?
-			cdev->bit_timing : &m_can_bittiming_const_31X;
-
-		cdev->can.data_bittiming_const = cdev->data_timing ?
-			cdev->data_timing :
-			&m_can_data_bittiming_const_31X;
+		cdev->can.bittiming_const = &m_can_bittiming_const_31X;
+		cdev->can.data_bittiming_const = &m_can_data_bittiming_const_31X;
 		break;
 	case 32:
 	case 33:
 		/* Support both MCAN version v3.2.x and v3.3.0 */
-		cdev->can.bittiming_const = cdev->bit_timing ?
-			cdev->bit_timing : &m_can_bittiming_const_31X;
-
-		cdev->can.data_bittiming_const = cdev->data_timing ?
-			cdev->data_timing :
-			&m_can_data_bittiming_const_31X;
+		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) ?
@@ -1518,6 +1510,8 @@ static int m_can_close(struct net_device *dev)
 	close_candev(dev);
 	can_led_event(dev, CAN_LED_EVENT_STOP);
 
+	phy_power_off(cdev->transceiver);
+
 	return 0;
 }
 
@@ -1703,10 +1697,14 @@ static int m_can_open(struct net_device *dev)
 	struct m_can_classdev *cdev = netdev_priv(dev);
 	int err;
 
-	err = m_can_clk_start(cdev);
+	err = phy_power_on(cdev->transceiver);
 	if (err)
 		return err;
 
+	err = m_can_clk_start(cdev);
+	if (err)
+		goto out_phy_power_off;
+
 	/* open the can device */
 	err = open_candev(dev);
 	if (err) {
@@ -1763,6 +1761,8 @@ static int m_can_open(struct net_device *dev)
 	close_candev(dev);
 exit_disable_clks:
 	m_can_clk_stop(cdev);
+out_phy_power_off:
+	phy_power_off(cdev->transceiver);
 	return err;
 }
 

drivers/net/can/m_can/m_can.h

@@ -28,6 +28,7 @@
 #include <linux/iopoll.h>
 #include <linux/can/dev.h>
 #include <linux/pinctrl/consumer.h>
+#include <linux/phy/phy.h>
 
 /* m_can lec values */
 enum m_can_lec_type {
@@ -82,9 +83,7 @@ struct m_can_classdev {
 	struct workqueue_struct *tx_wq;
 	struct work_struct tx_work;
 	struct sk_buff *tx_skb;
-
-	struct can_bittiming_const *bit_timing;
-	struct can_bittiming_const *data_timing;
+	struct phy *transceiver;
 
 	struct m_can_ops *ops;
 

drivers/net/can/m_can/m_can_platform.c

@@ -6,6 +6,7 @@
 // Copyright (C) 2018-19 Texas Instruments Incorporated - http://www.ti.com/
 
 #include <linux/platform_device.h>
+#include <linux/phy/phy.h>
 
 #include "m_can.h"
 
@@ -67,6 +68,7 @@ static int m_can_plat_probe(struct platform_device *pdev)
 	struct resource *res;
 	void __iomem *addr;
 	void __iomem *mram_addr;
+	struct phy *transceiver;
 	int irq, ret = 0;
 
 	mcan_class = m_can_class_allocate_dev(&pdev->dev,
@@ -80,8 +82,7 @@ static int m_can_plat_probe(struct platform_device *pdev)
 	if (ret)
 		goto probe_fail;
 
-	res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "m_can");
-	addr = devm_ioremap_resource(&pdev->dev, res);
+	addr = devm_platform_ioremap_resource_byname(pdev, "m_can");
 	irq = platform_get_irq_byname(pdev, "int0");
 	if (IS_ERR(addr) || irq < 0) {
 		ret = -EINVAL;
@@ -101,6 +102,16 @@ static int m_can_plat_probe(struct platform_device *pdev)
 		goto probe_fail;
 	}
 
+	transceiver = devm_phy_optional_get(&pdev->dev, NULL);
+	if (IS_ERR(transceiver)) {
+		ret = PTR_ERR(transceiver);
+		dev_err_probe(&pdev->dev, ret, "failed to get phy\n");
+		goto probe_fail;
+	}
+
+	if (transceiver)
+		mcan_class->can.bitrate_max = transceiver->attrs.max_link_rate;
+
 	priv->base = addr;
 	priv->mram_base = mram_addr;
 
@@ -108,6 +119,7 @@ static int m_can_plat_probe(struct platform_device *pdev)
 	mcan_class->pm_clock_support = 1;
 	mcan_class->can.clock.freq = clk_get_rate(mcan_class->cclk);
 	mcan_class->dev = &pdev->dev;
+	mcan_class->transceiver = transceiver;
 
 	mcan_class->ops = &m_can_plat_ops;
 

drivers/net/can/sja1000/peak_pci.c

@@ -28,6 +28,10 @@ MODULE_LICENSE("GPL v2");
 
 #define DRV_NAME  "peak_pci"
 
+/* FPGA cards FW version registers */
+#define PEAK_VER_REG1		0x40
+#define PEAK_VER_REG2		0x44
+
 struct peak_pciec_card;
 struct peak_pci_chan {
 	void __iomem *cfg_base;		/* Common for all channels */
@@ -41,9 +45,7 @@ struct peak_pci_chan {
 #define PEAK_PCI_CDR		(CDR_CBP | CDR_CLKOUT_MASK)
 #define PEAK_PCI_OCR		OCR_TX0_PUSHPULL
 
-/*
- * Important PITA registers
- */
+/* Important PITA registers */
 #define PITA_ICR		0x00	/* Interrupt control register */
 #define PITA_GPIOICR		0x18	/* GPIO interface control register */
 #define PITA_MISC		0x1C	/* Miscellaneous register */
@@ -70,27 +72,47 @@ static const u16 peak_pci_icr_masks[PEAK_PCI_CHAN_MAX] = {
 };
 
 static const struct pci_device_id peak_pci_tbl[] = {
-	{PEAK_PCI_VENDOR_ID, PEAK_PCI_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
-	{PEAK_PCI_VENDOR_ID, PEAK_PCIE_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
-	{PEAK_PCI_VENDOR_ID, PEAK_MPCI_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
-	{PEAK_PCI_VENDOR_ID, PEAK_MPCIE_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
-	{PEAK_PCI_VENDOR_ID, PEAK_PC_104P_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
-	{PEAK_PCI_VENDOR_ID, PEAK_PCI_104E_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
-	{PEAK_PCI_VENDOR_ID, PEAK_CPCI_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
-	{PEAK_PCI_VENDOR_ID, PEAK_PCIE_OEM_ID, PCI_ANY_ID, PCI_ANY_ID,},
+	{
+		PEAK_PCI_VENDOR_ID, PEAK_PCI_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,
+		.driver_data = (kernel_ulong_t)"PCAN-PCI",
+	}, {
+		PEAK_PCI_VENDOR_ID, PEAK_PCIE_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,
+		.driver_data = (kernel_ulong_t)"PCAN-PCI Express",
+	}, {
+		PEAK_PCI_VENDOR_ID, PEAK_MPCI_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,
+		.driver_data = (kernel_ulong_t)"PCAN-miniPCI",
+	}, {
+		PEAK_PCI_VENDOR_ID, PEAK_MPCIE_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,
+		.driver_data = (kernel_ulong_t)"PCAN-miniPCIe",
+	}, {
+		PEAK_PCI_VENDOR_ID, PEAK_PC_104P_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,
+		.driver_data = (kernel_ulong_t)"PCAN-PC/104-Plus Quad",
+	}, {
+		PEAK_PCI_VENDOR_ID, PEAK_PCI_104E_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,
+		.driver_data = (kernel_ulong_t)"PCAN-PCI/104-Express",
+	}, {
+		PEAK_PCI_VENDOR_ID, PEAK_CPCI_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,
+		.driver_data = (kernel_ulong_t)"PCAN-cPCI",
+	}, {
+		PEAK_PCI_VENDOR_ID, PEAK_PCIE_OEM_ID, PCI_ANY_ID, PCI_ANY_ID,
+		.driver_data = (kernel_ulong_t)"PCAN-Chip PCIe",
+	},
 #ifdef CONFIG_CAN_PEAK_PCIEC
-	{PEAK_PCI_VENDOR_ID, PEAK_PCIEC_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
-	{PEAK_PCI_VENDOR_ID, PEAK_PCIEC34_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,},
+	{
+		PEAK_PCI_VENDOR_ID, PEAK_PCIEC_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,
+		.driver_data = (kernel_ulong_t)"PCAN-ExpressCard",
+	}, {
+		PEAK_PCI_VENDOR_ID, PEAK_PCIEC34_DEVICE_ID, PCI_ANY_ID, PCI_ANY_ID,
+		.driver_data = (kernel_ulong_t)"PCAN-ExpressCard 34",
+	},
 #endif
-	{0,}
+	{ /* sentinel */ }
 };
 
 MODULE_DEVICE_TABLE(pci, peak_pci_tbl);
 
 #ifdef CONFIG_CAN_PEAK_PCIEC
-/*
- * PCAN-ExpressCard needs I2C bit-banging configuration option.
- */
+/* PCAN-ExpressCard needs I2C bit-banging configuration option. */
 
 /* GPIOICR byte access offsets */
 #define PITA_GPOUT		0x18	/* GPx output value */
@@ -156,12 +178,14 @@ static void peak_pci_write_reg(const struct sja1000_priv *priv,
 static inline void pita_set_scl_highz(struct peak_pciec_card *card)
 {
 	u8 gp_outen = readb(card->cfg_base + PITA_GPOEN) & ~PITA_GPIN_SCL;
+
 	writeb(gp_outen, card->cfg_base + PITA_GPOEN);
 }
 
 static inline void pita_set_sda_highz(struct peak_pciec_card *card)
 {
 	u8 gp_outen = readb(card->cfg_base + PITA_GPOEN) & ~PITA_GPIN_SDA;
+
 	writeb(gp_outen, card->cfg_base + PITA_GPOEN);
 }
 
@@ -230,9 +254,7 @@ static int pita_getscl(void *data)
 	return (readb(card->cfg_base + PITA_GPIN) & PITA_GPIN_SCL) ? 1 : 0;
 }
 
-/*
- * write commands to the LED chip though the I2C-bus of the PCAN-PCIeC
- */
+/* write commands to the LED chip though the I2C-bus of the PCAN-PCIeC */
 static int peak_pciec_write_pca9553(struct peak_pciec_card *card,
 				    u8 offset, u8 data)
 {
@@ -248,7 +270,7 @@ static int peak_pciec_write_pca9553(struct peak_pciec_card *card,
 	int ret;
 
 	/* cache led mask */
-	if ((offset == 5) && (data == card->led_cache))
+	if (offset == 5 && data == card->led_cache)
 		return 0;
 
 	ret = i2c_transfer(&card->led_chip, &msg, 1);
@@ -261,9 +283,7 @@ static int peak_pciec_write_pca9553(struct peak_pciec_card *card,
 	return 0;
 }
 
-/*
- * delayed work callback used to control the LEDs
- */
+/* delayed work callback used to control the LEDs */
 static void peak_pciec_led_work(struct work_struct *work)
 {
 	struct peak_pciec_card *card =
@@ -309,9 +329,7 @@ static void peak_pciec_led_work(struct work_struct *work)
 		schedule_delayed_work(&card->led_work, HZ);
 }
 
-/*
- * set LEDs blinking state
- */
+/* set LEDs blinking state */
 static void peak_pciec_set_leds(struct peak_pciec_card *card, u8 led_mask, u8 s)
 {
 	u8 new_led = card->led_cache;
@@ -328,25 +346,19 @@ static void peak_pciec_set_leds(struct peak_pciec_card *card, u8 led_mask, u8 s)
 	peak_pciec_write_pca9553(card, 5, new_led);
 }
 
-/*
- * start one second delayed work to control LEDs
- */
+/* start one second delayed work to control LEDs */
 static void peak_pciec_start_led_work(struct peak_pciec_card *card)
 {
 	schedule_delayed_work(&card->led_work, HZ);
 }
 
-/*
- * stop LEDs delayed work
- */
+/* stop LEDs delayed work */
 static void peak_pciec_stop_led_work(struct peak_pciec_card *card)
 {
 	cancel_delayed_work_sync(&card->led_work);
 }
 
-/*
- * initialize the PCA9553 4-bit I2C-bus LED chip
- */
+/* initialize the PCA9553 4-bit I2C-bus LED chip */
 static int peak_pciec_init_leds(struct peak_pciec_card *card)
 {
 	int err;
@@ -375,17 +387,14 @@ static int peak_pciec_init_leds(struct peak_pciec_card *card)
 	return peak_pciec_write_pca9553(card, 5, PCA9553_LS0_INIT);
 }
 
-/*
- * restore LEDs state to off peak_pciec_leds_exit
- */
+/* restore LEDs state to off peak_pciec_leds_exit */
 static void peak_pciec_leds_exit(struct peak_pciec_card *card)
 {
 	/* switch LEDs to off */
 	peak_pciec_write_pca9553(card, 5, PCA9553_LED_OFF_ALL);
 }
 
-/*
- * normal write sja1000 register method overloaded to catch when controller
+/* normal write sja1000 register method overloaded to catch when controller
  * is started or stopped, to control leds
  */
 static void peak_pciec_write_reg(const struct sja1000_priv *priv,
@@ -443,7 +452,7 @@ static int peak_pciec_probe(struct pci_dev *pdev, struct net_device *dev)
 	/* channel is the first one: do the init part */
 	} else {
 		/* create the bit banging I2C adapter structure */
-		card = kzalloc(sizeof(struct peak_pciec_card), GFP_KERNEL);
+		card = kzalloc(sizeof(*card), GFP_KERNEL);
 		if (!card)
 			return -ENOMEM;
 
@@ -506,9 +515,7 @@ static void peak_pciec_remove(struct peak_pciec_card *card)
 
 #else /* CONFIG_CAN_PEAK_PCIEC */
 
-/*
- * Placebo functions when PCAN-ExpressCard support is not selected
- */
+/* Placebo functions when PCAN-ExpressCard support is not selected */
 static inline int peak_pciec_probe(struct pci_dev *pdev, struct net_device *dev)
 {
 	return -ENODEV;
@@ -549,6 +556,7 @@ static int peak_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	void __iomem *cfg_base, *reg_base;
 	u16 sub_sys_id, icr;
 	int i, err, channels;
+	char fw_str[14] = "";
 
 	err = pci_enable_device(pdev);
 	if (err)
@@ -602,6 +610,21 @@ static int peak_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	/* Leave parport mux mode */
 	writeb(0x04, cfg_base + PITA_MISC + 3);
 
+	/* FPGA equipped card if not 0 */
+	if (readl(cfg_base + PEAK_VER_REG1)) {
+		/* FPGA card: display version of the running firmware */
+		u32 fw_ver = readl(cfg_base + PEAK_VER_REG2);
+
+		snprintf(fw_str, sizeof(fw_str), " FW v%u.%u.%u",
+			 (fw_ver >> 12) & 0xf,
+			 (fw_ver >> 8) & 0xf,
+			 (fw_ver >> 4) & 0xf);
+	}
+
+	/* Display commercial name (and, eventually, FW version) of the card */
+	dev_info(&pdev->dev, "%ux CAN %s%s\n",
+		 channels, (const char *)ent->driver_data, fw_str);
+
 	icr = readw(cfg_base + PITA_ICR + 2);
 
 	for (i = 0; i < channels; i++) {
@@ -642,8 +665,7 @@ static int peak_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		chan->prev_dev = pci_get_drvdata(pdev);
 		pci_set_drvdata(pdev, dev);
 
-		/*
-		 * PCAN-ExpressCard needs some additional i2c init.
+		/* PCAN-ExpressCard needs some additional i2c init.
 		 * This must be done *before* register_sja1000dev() but
 		 * *after* devices linkage
 		 */
@@ -709,7 +731,8 @@ static int peak_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
 	/* pci_xxx_config_word() return positive PCIBIOS_xxx error codes while
 	 * the probe() function must return a negative errno in case of failure
-	 * (err is unchanged if negative) */
+	 * (err is unchanged if negative)
+	 */
 	return pcibios_err_to_errno(err);
 }
 

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

@@ -15,10 +15,10 @@
 #include <linux/bitfield.h>
 #include <linux/clk.h>
 #include <linux/device.h>
+#include <linux/mod_devicetable.h>
 #include <linux/module.h>
-#include <linux/of.h>
-#include <linux/of_device.h>
 #include <linux/pm_runtime.h>
+#include <linux/property.h>
 
 #include <asm/unaligned.h>
 
@@ -2195,8 +2195,10 @@ static irqreturn_t mcp251xfd_irq(int irq, void *dev_id)
 			FIELD_GET(MCP251XFD_REG_INT_IE_MASK,
 				  priv->regs_status.intf);
 
-		if (!(intf_pending))
+		if (!(intf_pending)) {
+			can_rx_offload_threaded_irq_finish(&priv->offload);
 			return handled;
+		}
 
 		/* Some interrupts must be ACKed in the
 		 * MCP251XFD_REG_INT register.
@@ -2296,6 +2298,8 @@ static irqreturn_t mcp251xfd_irq(int irq, void *dev_id)
 	} while (1);
 
  out_fail:
+	can_rx_offload_threaded_irq_finish(&priv->offload);
+
 	netdev_err(priv->ndev, "IRQ handler returned %d (intf=0x%08x).\n",
 		   err, priv->regs_status.intf);
 	mcp251xfd_dump(priv);
@@ -2523,8 +2527,8 @@ static int mcp251xfd_open(struct net_device *ndev)
 	can_rx_offload_enable(&priv->offload);
 
 	err = request_threaded_irq(spi->irq, NULL, mcp251xfd_irq,
-				   IRQF_ONESHOT, dev_name(&spi->dev),
-				   priv);
+				   IRQF_SHARED | IRQF_ONESHOT,
+				   dev_name(&spi->dev), priv);
 	if (err)
 		goto out_can_rx_offload_disable;
 
@@ -2856,7 +2860,7 @@ static int mcp251xfd_probe(struct spi_device *spi)
 	struct gpio_desc *rx_int;
 	struct regulator *reg_vdd, *reg_xceiver;
 	struct clk *clk;
-	u32 freq;
+	u32 freq = 0;
 	int err;
 
 	if (!spi->irq)
@@ -2883,11 +2887,19 @@ static int mcp251xfd_probe(struct spi_device *spi)
 		return dev_err_probe(&spi->dev, PTR_ERR(reg_xceiver),
 				     "Failed to get Transceiver regulator!\n");
 
-	clk = devm_clk_get(&spi->dev, NULL);
+	clk = devm_clk_get_optional(&spi->dev, NULL);
 	if (IS_ERR(clk))
 		return dev_err_probe(&spi->dev, PTR_ERR(clk),
 				     "Failed to get Oscillator (clock)!\n");
-	freq = clk_get_rate(clk);
+	if (clk) {
+		freq = clk_get_rate(clk);
+	} else {
+		err = device_property_read_u32(&spi->dev, "clock-frequency",
+					       &freq);
+		if (err)
+			return dev_err_probe(&spi->dev, err,
+					     "Failed to get clock-frequency!\n");
+	}
 
 	/* Sanity check */
 	if (freq < MCP251XFD_SYSCLOCK_HZ_MIN ||

drivers/net/can/ti_hecc.c

@@ -786,6 +786,8 @@ static irqreturn_t ti_hecc_interrupt(int irq, void *dev_id)
 		int_status = hecc_read(priv, HECC_CANGIF0);
 	}
 
+	can_rx_offload_irq_finish(&priv->offload);
+
 	return IRQ_HANDLED;
 }
 

drivers/net/can/usb/esd_usb2.c

@@ -474,7 +474,7 @@ static void esd_usb2_write_bulk_callback(struct urb *urb)
 	netif_trans_update(netdev);
 }
 
-static ssize_t show_firmware(struct device *d,
+static ssize_t firmware_show(struct device *d,
 			     struct device_attribute *attr, char *buf)
 {
 	struct usb_interface *intf = to_usb_interface(d);
@@ -485,9 +485,9 @@ static ssize_t show_firmware(struct device *d,
 		       (dev->version >> 8) & 0xf,
 		       dev->version & 0xff);
 }
-static DEVICE_ATTR(firmware, 0444, show_firmware, NULL);
+static DEVICE_ATTR_RO(firmware);
 
-static ssize_t show_hardware(struct device *d,
+static ssize_t hardware_show(struct device *d,
 			     struct device_attribute *attr, char *buf)
 {
 	struct usb_interface *intf = to_usb_interface(d);
@@ -498,9 +498,9 @@ static ssize_t show_hardware(struct device *d,
 		       (dev->version >> 24) & 0xf,
 		       (dev->version >> 16) & 0xff);
 }
-static DEVICE_ATTR(hardware, 0444, show_hardware, NULL);
+static DEVICE_ATTR_RO(hardware);
 
-static ssize_t show_nets(struct device *d,
+static ssize_t nets_show(struct device *d,
 			 struct device_attribute *attr, char *buf)
 {
 	struct usb_interface *intf = to_usb_interface(d);
@@ -508,7 +508,7 @@ static ssize_t show_nets(struct device *d,
 
 	return sprintf(buf, "%d", dev->net_count);
 }
-static DEVICE_ATTR(nets, 0444, show_nets, NULL);
+static DEVICE_ATTR_RO(nets);
 
 static int esd_usb2_send_msg(struct esd_usb2 *dev, struct esd_usb2_msg *msg)
 {

drivers/net/can/usb/etas_es58x/es581_4.c

@@ -355,7 +355,7 @@ static int es581_4_tx_can_msg(struct es58x_priv *priv,
 		return -EMSGSIZE;
 
 	if (priv->tx_can_msg_cnt == 0) {
-		msg_len = 1; /* struct es581_4_bulk_tx_can_msg:num_can_msg */
+		msg_len = sizeof(es581_4_urb_cmd->bulk_tx_can_msg.num_can_msg);
 		es581_4_fill_urb_header(urb_cmd, ES581_4_CAN_COMMAND_TYPE,
 					ES581_4_CMD_ID_TX_MSG,
 					priv->channel_idx, msg_len);
@@ -371,8 +371,7 @@ static int es581_4_tx_can_msg(struct es58x_priv *priv,
 		return ret;
 
 	/* Fill message contents. */
-	tx_can_msg = (struct es581_4_tx_can_msg *)
-	    &es581_4_urb_cmd->bulk_tx_can_msg.tx_can_msg_buf[msg_len - 1];
+	tx_can_msg = (typeof(tx_can_msg))&es581_4_urb_cmd->raw_msg[msg_len];
 	put_unaligned_le32(es58x_get_raw_can_id(cf), &tx_can_msg->can_id);
 	put_unaligned_le32(priv->tx_head, &tx_can_msg->packet_idx);
 	put_unaligned_le16((u16)es58x_get_flags(skb), &tx_can_msg->flags);

drivers/net/can/usb/etas_es58x/es58x_core.c

@@ -19,7 +19,7 @@
 #include "es58x_core.h"
 
 #define DRV_VERSION "1.00"
-MODULE_AUTHOR("Mailhol Vincent <mailhol.vincent@wanadoo.fr>");
+MODULE_AUTHOR("Vincent Mailhol <mailhol.vincent@wanadoo.fr>");
 MODULE_AUTHOR("Arunachalam Santhanam <arunachalam.santhanam@in.bosch.com>");
 MODULE_DESCRIPTION("Socket CAN driver for ETAS ES58X USB adapters");
 MODULE_VERSION(DRV_VERSION);
@@ -70,7 +70,7 @@ MODULE_DEVICE_TABLE(usb, es58x_id_table);
  * bytes (the start of frame) are skipped and the CRC calculation
  * starts on the third byte.
  */
-#define ES58X_CRC_CALC_OFFSET 2
+#define ES58X_CRC_CALC_OFFSET sizeof_field(union es58x_urb_cmd, sof)
 
 /**
  * es58x_calculate_crc() - Compute the crc16 of a given URB.
@@ -2107,6 +2107,25 @@ static int es58x_init_netdev(struct es58x_device *es58x_dev, int channel_idx)
 	return ret;
 }
 
+/**
+ * es58x_free_netdevs() - Release all network resources of the device.
+ * @es58x_dev: ES58X device.
+ */
+static void es58x_free_netdevs(struct es58x_device *es58x_dev)
+{
+	int i;
+
+	for (i = 0; i < es58x_dev->num_can_ch; i++) {
+		struct net_device *netdev = es58x_dev->netdev[i];
+
+		if (!netdev)
+			continue;
+		unregister_candev(netdev);
+		es58x_dev->netdev[i] = NULL;
+		free_candev(netdev);
+	}
+}
+
 /**
  * es58x_get_product_info() - Get the product information and print them.
  * @es58x_dev: ES58X device.
@@ -2152,14 +2171,13 @@ static int es58x_get_product_info(struct es58x_device *es58x_dev)
 /**
  * es58x_init_es58x_dev() - Initialize the ES58X device.
  * @intf: USB interface.
- * @p_es58x_dev: pointer to the address of the ES58X device.
  * @driver_info: Quirks of the device.
  *
- * Return: zero on success, errno when any error occurs.
+ * Return: pointer to an ES58X device on success, error pointer when
+ *	any error occurs.
  */
-static int es58x_init_es58x_dev(struct usb_interface *intf,
-				struct es58x_device **p_es58x_dev,
-				kernel_ulong_t driver_info)
+static struct es58x_device *es58x_init_es58x_dev(struct usb_interface *intf,
+						 kernel_ulong_t driver_info)
 {
 	struct device *dev = &intf->dev;
 	struct es58x_device *es58x_dev;
@@ -2176,7 +2194,7 @@ static int es58x_init_es58x_dev(struct usb_interface *intf,
 	ret = usb_find_common_endpoints(intf->cur_altsetting, &ep_in, &ep_out,
 					NULL, NULL);
 	if (ret)
-		return ret;
+		return ERR_PTR(ret);
 
 	if (driver_info & ES58X_FD_FAMILY) {
 		param = &es58x_fd_param;
@@ -2186,9 +2204,10 @@ static int es58x_init_es58x_dev(struct usb_interface *intf,
 		ops = &es581_4_ops;
 	}
 
-	es58x_dev = kzalloc(es58x_sizeof_es58x_device(param), GFP_KERNEL);
+	es58x_dev = devm_kzalloc(dev, es58x_sizeof_es58x_device(param),
+				 GFP_KERNEL);
 	if (!es58x_dev)
-		return -ENOMEM;
+		return ERR_PTR(-ENOMEM);
 
 	es58x_dev->param = param;
 	es58x_dev->ops = ops;
@@ -2213,9 +2232,7 @@ static int es58x_init_es58x_dev(struct usb_interface *intf,
 					     ep_out->bEndpointAddress);
 	es58x_dev->rx_max_packet_size = le16_to_cpu(ep_in->wMaxPacketSize);
 
-	*p_es58x_dev = es58x_dev;
-
-	return 0;
+	return es58x_dev;
 }
 
 /**
@@ -2232,30 +2249,21 @@ static int es58x_probe(struct usb_interface *intf,
 	struct es58x_device *es58x_dev;
 	int ch_idx, ret;
 
-	ret = es58x_init_es58x_dev(intf, &es58x_dev, id->driver_info);
-	if (ret)
-		return ret;
+	es58x_dev = es58x_init_es58x_dev(intf, id->driver_info);
+	if (IS_ERR(es58x_dev))
+		return PTR_ERR(es58x_dev);
 
 	ret = es58x_get_product_info(es58x_dev);
 	if (ret)
-		goto cleanup_es58x_dev;
+		return ret;
 
 	for (ch_idx = 0; ch_idx < es58x_dev->num_can_ch; ch_idx++) {
 		ret = es58x_init_netdev(es58x_dev, ch_idx);
-		if (ret)
-			goto cleanup_candev;
-	}
-
-	return ret;
-
- cleanup_candev:
-	for (ch_idx = 0; ch_idx < es58x_dev->num_can_ch; ch_idx++)
-		if (es58x_dev->netdev[ch_idx]) {
-			unregister_candev(es58x_dev->netdev[ch_idx]);
-			free_candev(es58x_dev->netdev[ch_idx]);
+		if (ret) {
+			es58x_free_netdevs(es58x_dev);
+			return ret;
 		}
- cleanup_es58x_dev:
-	kfree(es58x_dev);
+	}
 
 	return ret;
 }
@@ -2270,24 +2278,12 @@ static int es58x_probe(struct usb_interface *intf,
 static void es58x_disconnect(struct usb_interface *intf)
 {
 	struct es58x_device *es58x_dev = usb_get_intfdata(intf);
-	struct net_device *netdev;
-	int i;
 
 	dev_info(&intf->dev, "Disconnecting %s %s\n",
 		 es58x_dev->udev->manufacturer, es58x_dev->udev->product);
 
-	for (i = 0; i < es58x_dev->num_can_ch; i++) {
-		netdev = es58x_dev->netdev[i];
-		if (!netdev)
-			continue;
-		unregister_candev(netdev);
-		es58x_dev->netdev[i] = NULL;
-		free_candev(netdev);
-	}
-
+	es58x_free_netdevs(es58x_dev);
 	es58x_free_urbs(es58x_dev);
-
-	kfree(es58x_dev);
 	usb_set_intfdata(intf, NULL);
 }
 

drivers/net/can/usb/etas_es58x/es58x_core.h

@@ -287,7 +287,7 @@ struct es58x_priv {
  * @rx_urb_cmd_max_len: Maximum length of a RX URB command.
  * @fifo_mask: Bit mask to quickly convert the tx_tail and tx_head
  *	field of the struct es58x_priv into echo_skb
- *	indexes. Properties: @fifo_mask = echos_skb_max - 1 where
+ *	indexes. Properties: @fifo_mask = echo_skb_max - 1 where
  *	echo_skb_max must be a power of two. Also, echo_skb_max must
  *	not exceed the maximum size of the device internal TX FIFO
  *	length. This parameter is used to control the network queue

drivers/net/can/usb/etas_es58x/es58x_fd.c

@@ -357,8 +357,7 @@ static int es58x_fd_tx_can_msg(struct es58x_priv *priv,
 		return ret;
 
 	/* Fill message contents. */
-	tx_can_msg = (struct es58x_fd_tx_can_msg *)
-	    &es58x_fd_urb_cmd->tx_can_msg_buf[msg_len];
+	tx_can_msg = (typeof(tx_can_msg))&es58x_fd_urb_cmd->raw_msg[msg_len];
 	tx_can_msg->packet_idx = (u8)priv->tx_head;
 	put_unaligned_le32(es58x_get_raw_can_id(cf), &tx_can_msg->can_id);
 	tx_can_msg->flags = (u8)es58x_get_flags(skb);
@@ -463,9 +462,9 @@ static int es58x_fd_get_timestamp(struct es58x_device *es58x_dev)
 }
 
 /* Nominal bittiming constants for ES582.1 and ES584.1 as specified in
- * the microcontroller datasheet: "SAM E701/S70/V70/V71 Family"
- * section 49.6.8 "MCAN Nominal Bit Timing and Prescaler Register"
- * from Microchip.
+ * the microcontroller datasheet: "SAM E70/S70/V70/V71 Family" section
+ * 49.6.8 "MCAN Nominal Bit Timing and Prescaler Register" from
+ * Microchip.
  *
  * The values from the specification are the hardware register
  * values. To convert them to the functional values, all ranges were
@@ -484,8 +483,8 @@ static const struct can_bittiming_const es58x_fd_nom_bittiming_const = {
 };
 
 /* Data bittiming constants for ES582.1 and ES584.1 as specified in
- * the microcontroller datasheet: "SAM E701/S70/V70/V71 Family"
- * section 49.6.4 "MCAN Data Bit Timing and Prescaler Register" from
+ * the microcontroller datasheet: "SAM E70/S70/V70/V71 Family" section
+ * 49.6.4 "MCAN Data Bit Timing and Prescaler Register" from
  * Microchip.
  */
 static const struct can_bittiming_const es58x_fd_data_bittiming_const = {
@@ -501,9 +500,9 @@ static const struct can_bittiming_const es58x_fd_data_bittiming_const = {
 };
 
 /* Transmission Delay Compensation constants for ES582.1 and ES584.1
- * as specified in the microcontroller datasheet: "SAM
- * E701/S70/V70/V71 Family" section 49.6.15 "MCAN Transmitter Delay
- * Compensation Register" from Microchip.
+ * as specified in the microcontroller datasheet: "SAM E70/S70/V70/V71
+ * Family" section 49.6.15 "MCAN Transmitter Delay Compensation
+ * Register" from Microchip.
  */
 static const struct can_tdc_const es58x_tdc_const = {
 	.tdcv_max = 0, /* Manual mode not supported. */

drivers/net/can/usb/peak_usb/pcan_usb.c

@@ -63,6 +63,8 @@
 
 #define PCAN_USB_MSG_HEADER_LEN		2
 
+#define PCAN_USB_MSG_TX_CAN		2	/* Tx msg is a CAN frame */
+
 /* PCAN-USB adapter internal clock (MHz) */
 #define PCAN_USB_CRYSTAL_HZ		16000000
 
@@ -73,6 +75,10 @@
 #define PCAN_USB_STATUSLEN_RTR		(1 << 4)
 #define PCAN_USB_STATUSLEN_DLC		(0xf)
 
+/* PCAN-USB 4.1 CAN Id tx extended flags */
+#define PCAN_USB_TX_SRR			0x01	/* SJA1000 SRR command */
+#define PCAN_USB_TX_AT			0x02	/* SJA1000 AT command */
+
 /* PCAN-USB error flags */
 #define PCAN_USB_ERROR_TXFULL		0x01
 #define PCAN_USB_ERROR_RXQOVR		0x02
@@ -384,7 +390,8 @@ static int pcan_usb_get_device_id(struct peak_usb_device *dev, u32 *device_id)
 	if (err)
 		netdev_err(dev->netdev, "getting device id failure: %d\n", err);
 
-	*device_id = args[0];
+	else
+		*device_id = args[0];
 
 	return err;
 }
@@ -445,145 +452,65 @@ static int pcan_usb_decode_error(struct pcan_usb_msg_context *mc, u8 n,
 {
 	struct sk_buff *skb;
 	struct can_frame *cf;
-	enum can_state new_state;
+	enum can_state new_state = CAN_STATE_ERROR_ACTIVE;
 
 	/* ignore this error until 1st ts received */
 	if (n == PCAN_USB_ERROR_QOVR)
 		if (!mc->pdev->time_ref.tick_count)
 			return 0;
 
-	new_state = mc->pdev->dev.can.state;
-
-	switch (mc->pdev->dev.can.state) {
-	case CAN_STATE_ERROR_ACTIVE:
-		if (n & PCAN_USB_ERROR_BUS_LIGHT) {
-			new_state = CAN_STATE_ERROR_WARNING;
-			break;
-		}
-		fallthrough;
-
-	case CAN_STATE_ERROR_WARNING:
-		if (n & PCAN_USB_ERROR_BUS_HEAVY) {
-			new_state = CAN_STATE_ERROR_PASSIVE;
-			break;
-		}
-		if (n & PCAN_USB_ERROR_BUS_OFF) {
-			new_state = CAN_STATE_BUS_OFF;
-			break;
-		}
-		if (n & ~PCAN_USB_ERROR_BUS) {
-			/*
-			 * trick to bypass next comparison and process other
-			 * errors
-			 */
-			new_state = CAN_STATE_MAX;
-			break;
-		}
-		if ((n & PCAN_USB_ERROR_BUS_LIGHT) == 0) {
-			/* no error (back to active state) */
-			new_state = CAN_STATE_ERROR_ACTIVE;
-			break;
-		}
-		break;
-
-	case CAN_STATE_ERROR_PASSIVE:
-		if (n & PCAN_USB_ERROR_BUS_OFF) {
-			new_state = CAN_STATE_BUS_OFF;
-			break;
-		}
-		if (n & PCAN_USB_ERROR_BUS_LIGHT) {
-			new_state = CAN_STATE_ERROR_WARNING;
-			break;
-		}
-		if (n & ~PCAN_USB_ERROR_BUS) {
-			/*
-			 * trick to bypass next comparison and process other
-			 * errors
-			 */
-			new_state = CAN_STATE_MAX;
-			break;
-		}
-
-		if ((n & PCAN_USB_ERROR_BUS_HEAVY) == 0) {
-			/* no error (back to warning state) */
-			new_state = CAN_STATE_ERROR_WARNING;
-			break;
-		}
-		break;
-
-	default:
-		/* do nothing waiting for restart */
-		return 0;
-	}
-
-	/* donot post any error if current state didn't change */
-	if (mc->pdev->dev.can.state == new_state)
-		return 0;
-
 	/* allocate an skb to store the error frame */
 	skb = alloc_can_err_skb(mc->netdev, &cf);
-	if (!skb)
-		return -ENOMEM;
-
-	switch (new_state) {
-	case CAN_STATE_BUS_OFF:
-		cf->can_id |= CAN_ERR_BUSOFF;
-		mc->pdev->dev.can.can_stats.bus_off++;
-		can_bus_off(mc->netdev);
-		break;
-
-	case CAN_STATE_ERROR_PASSIVE:
-		cf->can_id |= CAN_ERR_CRTL;
-		cf->data[1] = (mc->pdev->bec.txerr > mc->pdev->bec.rxerr) ?
-				CAN_ERR_CRTL_TX_PASSIVE :
-				CAN_ERR_CRTL_RX_PASSIVE;
-		cf->data[6] = mc->pdev->bec.txerr;
-		cf->data[7] = mc->pdev->bec.rxerr;
-
-		mc->pdev->dev.can.can_stats.error_passive++;
-		break;
-
-	case CAN_STATE_ERROR_WARNING:
-		cf->can_id |= CAN_ERR_CRTL;
-		cf->data[1] = (mc->pdev->bec.txerr > mc->pdev->bec.rxerr) ?
-				CAN_ERR_CRTL_TX_WARNING :
-				CAN_ERR_CRTL_RX_WARNING;
-		cf->data[6] = mc->pdev->bec.txerr;
-		cf->data[7] = mc->pdev->bec.rxerr;
-
-		mc->pdev->dev.can.can_stats.error_warning++;
-		break;
 
-	case CAN_STATE_ERROR_ACTIVE:
-		cf->can_id |= CAN_ERR_CRTL;
-		cf->data[1] = CAN_ERR_CRTL_ACTIVE;
-
-		/* sync local copies of rxerr/txerr counters */
-		mc->pdev->bec.txerr = 0;
-		mc->pdev->bec.rxerr = 0;
-		break;
-
-	default:
-		/* CAN_STATE_MAX (trick to handle other errors) */
-		if (n & PCAN_USB_ERROR_TXQFULL)
-			netdev_dbg(mc->netdev, "device Tx queue full)\n");
-
-		if (n & PCAN_USB_ERROR_RXQOVR) {
-			netdev_dbg(mc->netdev, "data overrun interrupt\n");
+	if (n & PCAN_USB_ERROR_RXQOVR) {
+		/* data overrun interrupt */
+		netdev_dbg(mc->netdev, "data overrun interrupt\n");
+		mc->netdev->stats.rx_over_errors++;
+		mc->netdev->stats.rx_errors++;
+		if (cf) {
 			cf->can_id |= CAN_ERR_CRTL;
 			cf->data[1] |= CAN_ERR_CRTL_RX_OVERFLOW;
-			mc->netdev->stats.rx_over_errors++;
-			mc->netdev->stats.rx_errors++;
 		}
+	}
 
-		cf->data[6] = mc->pdev->bec.txerr;
-		cf->data[7] = mc->pdev->bec.rxerr;
+	if (n & PCAN_USB_ERROR_TXQFULL)
+		netdev_dbg(mc->netdev, "device Tx queue full)\n");
 
-		new_state = mc->pdev->dev.can.state;
-		break;
+	if (n & PCAN_USB_ERROR_BUS_OFF) {
+		new_state = CAN_STATE_BUS_OFF;
+	} else if (n & PCAN_USB_ERROR_BUS_HEAVY) {
+		new_state = ((mc->pdev->bec.txerr >= 128) ||
+			     (mc->pdev->bec.rxerr >= 128)) ?
+				CAN_STATE_ERROR_PASSIVE :
+				CAN_STATE_ERROR_WARNING;
+	} else {
+		new_state = CAN_STATE_ERROR_ACTIVE;
 	}
 
-	mc->pdev->dev.can.state = new_state;
+	/* handle change of state */
+	if (new_state != mc->pdev->dev.can.state) {
+		enum can_state tx_state =
+			(mc->pdev->bec.txerr >= mc->pdev->bec.rxerr) ?
+				new_state : 0;
+		enum can_state rx_state =
+			(mc->pdev->bec.txerr <= mc->pdev->bec.rxerr) ?
+				new_state : 0;
+
+		can_change_state(mc->netdev, cf, tx_state, rx_state);
+
+		if (new_state == CAN_STATE_BUS_OFF) {
+			can_bus_off(mc->netdev);
+		} else if (cf && (cf->can_id & CAN_ERR_CRTL)) {
+			/* Supply TX/RX error counters in case of
+			 * controller error.
+			 */
+			cf->data[6] = mc->pdev->bec.txerr;
+			cf->data[7] = mc->pdev->bec.rxerr;
+		}
+	}
+
+	if (!skb)
+		return -ENOMEM;
 
 	if (status_len & PCAN_USB_STATUSLEN_TIMESTAMP) {
 		struct skb_shared_hwtstamps *hwts = skb_hwtstamps(skb);
@@ -704,6 +631,7 @@ static int pcan_usb_decode_data(struct pcan_usb_msg_context *mc, u8 status_len)
 	struct sk_buff *skb;
 	struct can_frame *cf;
 	struct skb_shared_hwtstamps *hwts;
+	u32 can_id_flags;
 
 	skb = alloc_can_skb(mc->netdev, &cf);
 	if (!skb)
@@ -713,13 +641,15 @@ static int pcan_usb_decode_data(struct pcan_usb_msg_context *mc, u8 status_len)
 		if ((mc->ptr + 4) > mc->end)
 			goto decode_failed;
 
-		cf->can_id = get_unaligned_le32(mc->ptr) >> 3 | CAN_EFF_FLAG;
+		can_id_flags = get_unaligned_le32(mc->ptr);
+		cf->can_id = can_id_flags >> 3 | CAN_EFF_FLAG;
 		mc->ptr += 4;
 	} else {
 		if ((mc->ptr + 2) > mc->end)
 			goto decode_failed;
 
-		cf->can_id = get_unaligned_le16(mc->ptr) >> 5;
+		can_id_flags = get_unaligned_le16(mc->ptr);
+		cf->can_id = can_id_flags >> 5;
 		mc->ptr += 2;
 	}
 
@@ -742,6 +672,10 @@ static int pcan_usb_decode_data(struct pcan_usb_msg_context *mc, u8 status_len)
 
 		memcpy(cf->data, mc->ptr, cf->len);
 		mc->ptr += rec_len;
+
+		/* Ignore next byte (client private id) if SRR bit is set */
+		if (can_id_flags & PCAN_USB_TX_SRR)
+			mc->ptr++;
 	}
 
 	/* convert timestamp into kernel time */
@@ -819,10 +753,11 @@ static int pcan_usb_encode_msg(struct peak_usb_device *dev, struct sk_buff *skb,
 	struct net_device *netdev = dev->netdev;
 	struct net_device_stats *stats = &netdev->stats;
 	struct can_frame *cf = (struct can_frame *)skb->data;
+	u32 can_id_flags = cf->can_id & CAN_ERR_MASK;
 	u8 *pc;
 
-	obuf[0] = 2;
-	obuf[1] = 1;
+	obuf[0] = PCAN_USB_MSG_TX_CAN;
+	obuf[1] = 1;	/* only one CAN frame is stored in the packet */
 
 	pc = obuf + PCAN_USB_MSG_HEADER_LEN;
 
@@ -837,12 +772,28 @@ static int pcan_usb_encode_msg(struct peak_usb_device *dev, struct sk_buff *skb,
 		*pc |= PCAN_USB_STATUSLEN_EXT_ID;
 		pc++;
 
-		put_unaligned_le32((cf->can_id & CAN_ERR_MASK) << 3, pc);
+		can_id_flags <<= 3;
+
+		if (dev->can.ctrlmode & CAN_CTRLMODE_LOOPBACK)
+			can_id_flags |= PCAN_USB_TX_SRR;
+
+		if (dev->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT)
+			can_id_flags |= PCAN_USB_TX_AT;
+
+		put_unaligned_le32(can_id_flags, pc);
 		pc += 4;
 	} else {
 		pc++;
 
-		put_unaligned_le16((cf->can_id & CAN_ERR_MASK) << 5, pc);
+		can_id_flags <<= 5;
+
+		if (dev->can.ctrlmode & CAN_CTRLMODE_LOOPBACK)
+			can_id_flags |= PCAN_USB_TX_SRR;
+
+		if (dev->can.ctrlmode & CAN_CTRLMODE_ONE_SHOT)
+			can_id_flags |= PCAN_USB_TX_AT;
+
+		put_unaligned_le16(can_id_flags, pc);
 		pc += 2;
 	}
 
@@ -852,6 +803,10 @@ static int pcan_usb_encode_msg(struct peak_usb_device *dev, struct sk_buff *skb,
 		pc += cf->len;
 	}
 
+	/* SRR bit needs a writer id (useless here) */
+	if (can_id_flags & PCAN_USB_TX_SRR)
+		*pc++ = 0x80;
+
 	obuf[(*size)-1] = (u8)(stats->tx_packets & 0xff);
 
 	return 0;
@@ -926,6 +881,19 @@ static int pcan_usb_init(struct peak_usb_device *dev)
 		return err;
 	}
 
+	/* Since rev 4.1, PCAN-USB is able to make single-shot as well as
+	 * looped back frames.
+	 */
+	if (dev->device_rev >= 41) {
+		struct can_priv *priv = netdev_priv(dev->netdev);
+
+		priv->ctrlmode_supported |= CAN_CTRLMODE_ONE_SHOT |
+					    CAN_CTRLMODE_LOOPBACK;
+	} else {
+		dev_info(dev->netdev->dev.parent,
+			 "Firmware update available. Please contact support@peak-system.com\n");
+	}
+
 	dev_info(dev->netdev->dev.parent,
 		 "PEAK-System %s adapter hwrev %u serial %08X (%u channel)\n",
 		 pcan_usb.name, dev->device_rev, serial_number,

include/linux/can/bittiming.h

@@ -37,7 +37,7 @@
  *	quanta, from when the bit is sent on the TX pin to when it is
  *	received on the RX pin of the transmitter. Possible options:
  *
- *	  O: automatic mode. The controller dynamically measure @tdcv
+ *	  0: automatic mode. The controller dynamically measures @tdcv
  *	  for each transmitted CAN FD frame.
  *
  *	  Other values: manual mode. Use the fixed provided value.
@@ -45,7 +45,7 @@
  * @tdco: Transmitter Delay Compensation Offset. Offset value, in time
  *	quanta, defining the distance between the start of the bit
  *	reception on the RX pin of the transceiver and the SSP
- *	position such as SSP = @tdcv + @tdco.
+ *	position such that SSP = @tdcv + @tdco.
  *
  *	If @tdco is zero, then TDC is disabled and both @tdcv and
  *	@tdcf should be ignored.

include/linux/can/platform/flexcan.h

+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2021  Angelo Dureghello <angelo@kernel-space.org>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _CAN_PLATFORM_FLEXCAN_H
+#define _CAN_PLATFORM_FLEXCAN_H
+
+struct flexcan_platform_data {
+	u32 clock_frequency;
+	u8 clk_src;
+};
+
+#endif /* _CAN_PLATFORM_FLEXCAN_H */

include/linux/can/rx-offload.h

@@ -20,6 +20,7 @@ struct can_rx_offload {
 					bool drop);
 
 	struct sk_buff_head skb_queue;
+	struct sk_buff_head skb_irq_queue;
 	u32 skb_queue_len_max;
 
 	unsigned int mb_first;
@@ -48,14 +49,11 @@ unsigned int can_rx_offload_get_echo_skb(struct can_rx_offload *offload,
 					 unsigned int *frame_len_ptr);
 int can_rx_offload_queue_tail(struct can_rx_offload *offload,
 			      struct sk_buff *skb);
+void can_rx_offload_irq_finish(struct can_rx_offload *offload);
+void can_rx_offload_threaded_irq_finish(struct can_rx_offload *offload);
 void can_rx_offload_del(struct can_rx_offload *offload);
 void can_rx_offload_enable(struct can_rx_offload *offload);
 
-static inline void can_rx_offload_schedule(struct can_rx_offload *offload)
-{
-	napi_schedule(&offload->napi);
-}
-
 static inline void can_rx_offload_disable(struct can_rx_offload *offload)
 {
 	napi_disable(&offload->napi);

net/can/j1939/socket.c

@@ -352,7 +352,7 @@ static void j1939_sk_sock_destruct(struct sock *sk)
 {
 	struct j1939_sock *jsk = j1939_sk(sk);
 
-	/* This function will be call by the generic networking code, when then
+	/* This function will be called by the generic networking code, when
 	 * the socket is ultimately closed (sk->sk_destruct).
 	 *
 	 * The race between

net/can/j1939/transport.c

@@ -776,7 +776,7 @@ static int j1939_session_tx_dpo(struct j1939_session *session)
 static int j1939_session_tx_dat(struct j1939_session *session)
 {
 	struct j1939_priv *priv = session->priv;
-	struct j1939_sk_buff_cb *skcb;
+	struct j1939_sk_buff_cb *se_skcb;
 	int offset, pkt_done, pkt_end;
 	unsigned int len, pdelay;
 	struct sk_buff *se_skb;
@@ -788,7 +788,7 @@ static int j1939_session_tx_dat(struct j1939_session *session)
 	if (!se_skb)
 		return -ENOBUFS;
 
-	skcb = j1939_skb_to_cb(se_skb);
+	se_skcb = j1939_skb_to_cb(se_skb);
 	tpdat = se_skb->data;
 	ret = 0;
 	pkt_done = 0;
@@ -800,7 +800,7 @@ static int j1939_session_tx_dat(struct j1939_session *session)
 
 	while (session->pkt.tx < pkt_end) {
 		dat[0] = session->pkt.tx - session->pkt.dpo + 1;
-		offset = (session->pkt.tx * 7) - skcb->offset;
+		offset = (session->pkt.tx * 7) - se_skcb->offset;
 		len =  se_skb->len - offset;
 		if (len > 7)
 			len = 7;
@@ -808,7 +808,8 @@ static int j1939_session_tx_dat(struct j1939_session *session)
 		if (offset + len > se_skb->len) {
 			netdev_err_once(priv->ndev,
 					"%s: 0x%p: requested data outside of queued buffer: offset %i, len %i, pkt.tx: %i\n",
-					__func__, session, skcb->offset, se_skb->len , session->pkt.tx);
+					__func__, session, se_skcb->offset,
+					se_skb->len , session->pkt.tx);
 			ret = -EOVERFLOW;
 			goto out_free;
 		}
@@ -1092,7 +1093,7 @@ j1939_session_deactivate_activate_next(struct j1939_session *session)
 }
 
 static void __j1939_session_cancel(struct j1939_session *session,
-				 enum j1939_xtp_abort err)
+				   enum j1939_xtp_abort err)
 {
 	struct j1939_priv *priv = session->priv;
 
@@ -1190,13 +1191,13 @@ static enum hrtimer_restart j1939_tp_txtimer(struct hrtimer *hrtimer)
 
 static void j1939_session_completed(struct j1939_session *session)
 {
-	struct sk_buff *skb;
+	struct sk_buff *se_skb;
 
 	if (!session->transmission) {
-		skb = j1939_session_skb_get(session);
+		se_skb = j1939_session_skb_get(session);
 		/* distribute among j1939 receivers */
-		j1939_sk_recv(session->priv, skb);
-		consume_skb(skb);
+		j1939_sk_recv(session->priv, se_skb);
+		consume_skb(se_skb);
 	}
 
 	j1939_session_deactivate_activate_next(session);
@@ -1263,12 +1264,14 @@ static bool j1939_xtp_rx_cmd_bad_pgn(struct j1939_session *session,
 		break;
 
 	case J1939_ETP_CMD_RTS:
-	case J1939_TP_CMD_RTS: /* fall through */
+		fallthrough;
+	case J1939_TP_CMD_RTS:
 		abort = J1939_XTP_ABORT_BUSY;
 		break;
 
 	case J1939_ETP_CMD_CTS:
-	case J1939_TP_CMD_CTS: /* fall through */
+		fallthrough;
+	case J1939_TP_CMD_CTS:
 		abort = J1939_XTP_ABORT_ECTS_UNXPECTED_PGN;
 		break;
 
@@ -1277,7 +1280,8 @@ static bool j1939_xtp_rx_cmd_bad_pgn(struct j1939_session *session,
 		break;
 
 	case J1939_ETP_CMD_EOMA:
-	case J1939_TP_CMD_EOMA: /* fall through */
+		fallthrough;
+	case J1939_TP_CMD_EOMA:
 		abort = J1939_XTP_ABORT_OTHER;
 		break;
 
@@ -1767,7 +1771,7 @@ static void j1939_xtp_rx_dat_one(struct j1939_session *session,
 				 struct sk_buff *skb)
 {
 	struct j1939_priv *priv = session->priv;
-	struct j1939_sk_buff_cb *skcb;
+	struct j1939_sk_buff_cb *skcb, *se_skcb;
 	struct sk_buff *se_skb = NULL;
 	const u8 *dat;
 	u8 *tpdat;
@@ -1792,7 +1796,8 @@ static void j1939_xtp_rx_dat_one(struct j1939_session *session,
 			break;
 		fallthrough;
 	case J1939_TP_CMD_BAM:
-	case J1939_TP_CMD_CTS: /* fall through */
+		fallthrough;
+	case J1939_TP_CMD_CTS:
 		if (skcb->addr.type != J1939_ETP)
 			break;
 		fallthrough;
@@ -1817,8 +1822,8 @@ static void j1939_xtp_rx_dat_one(struct j1939_session *session,
 		goto out_session_cancel;
 	}
 
-	skcb = j1939_skb_to_cb(se_skb);
-	offset = packet * 7 - skcb->offset;
+	se_skcb = j1939_skb_to_cb(se_skb);
+	offset = packet * 7 - se_skcb->offset;
 	nbytes = se_skb->len - offset;
 	if (nbytes > 7)
 		nbytes = 7;
@@ -1846,7 +1851,7 @@ static void j1939_xtp_rx_dat_one(struct j1939_session *session,
 	if (packet == session->pkt.rx)
 		session->pkt.rx++;
 
-	if (skcb->addr.type != J1939_ETP &&
+	if (se_skcb->addr.type != J1939_ETP &&
 	    j1939_cb_is_broadcast(&session->skcb)) {
 		if (session->pkt.rx >= session->pkt.total)
 			final = true;
@@ -1995,7 +2000,8 @@ static void j1939_tp_cmd_recv(struct j1939_priv *priv, struct sk_buff *skb)
 		extd = J1939_ETP;
 		fallthrough;
 	case J1939_TP_CMD_BAM:
-	case J1939_TP_CMD_RTS: /* fall through */
+		fallthrough;
+	case J1939_TP_CMD_RTS:
 		if (skcb->addr.type != extd)
 			return;