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* [RFC PATCH 0/2] Change flexcan features at runtime
@ 2022-01-04 13:20 Dario Binacchi
  2022-01-04 13:20 ` [RFC PATCH 1/2] can: flexcan: allow to change quirks " Dario Binacchi
  2022-01-04 13:20 ` [RFC PATCH 2/2] can: flexcan: add ethtool support Dario Binacchi
  0 siblings, 2 replies; 3+ messages in thread
From: Dario Binacchi @ 2022-01-04 13:20 UTC (permalink / raw)
  To: linux-kernel
  Cc: Michael Trimarchi, Dario Binacchi, David S. Miller,
	Jakub Kicinski, Marc Kleine-Budde, Wolfgang Grandegger,
	linux-can, netdev

This series was born from the review https://lkml.org/lkml/2022/1/2/127
by Marc Kleine-Budde. The ethtool module is minimal and lacks the
callback to change the setting at runtime (this has yet to be defined).
I'm certainly not an expert but might it make sense to use the
set_features() callback? Although I understand that it belongs to
`struct net_device_ops' and not to 'struct ethtool_ops'.


Dario Binacchi (2):
  can: flexcan: allow to change quirks at runtime
  can: flexcan: add ethtool support

 drivers/net/can/Makefile                      |   3 +
 drivers/net/can/flexcan.h                     | 107 +++++++++++++
 drivers/net/can/flexcan_ethtool.c             |  29 ++++
 drivers/net/can/{flexcan.c => flexcan_main.c} | 144 ++++--------------
 4 files changed, 166 insertions(+), 117 deletions(-)
 create mode 100644 drivers/net/can/flexcan.h
 create mode 100644 drivers/net/can/flexcan_ethtool.c
 rename drivers/net/can/{flexcan.c => flexcan_main.c} (92%)

-- 
2.32.0


^ permalink raw reply	[flat|nested] 3+ messages in thread

* [RFC PATCH 1/2] can: flexcan: allow to change quirks at runtime
  2022-01-04 13:20 [RFC PATCH 0/2] Change flexcan features at runtime Dario Binacchi
@ 2022-01-04 13:20 ` Dario Binacchi
  2022-01-04 13:20 ` [RFC PATCH 2/2] can: flexcan: add ethtool support Dario Binacchi
  1 sibling, 0 replies; 3+ messages in thread
From: Dario Binacchi @ 2022-01-04 13:20 UTC (permalink / raw)
  To: linux-kernel
  Cc: Michael Trimarchi, Dario Binacchi, David S. Miller,
	Jakub Kicinski, Marc Kleine-Budde, Wolfgang Grandegger,
	linux-can, netdev

This is a preliminary patch for the upcoming support to ethtool api.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
---

 drivers/net/can/flexcan.c | 50 +++++++++++++++++++--------------------
 1 file changed, 25 insertions(+), 25 deletions(-)

diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c
index 12b60ad95b02..223c32bf1f6c 100644
--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -369,7 +369,7 @@ struct flexcan_priv {
 
 	struct clk *clk_ipg;
 	struct clk *clk_per;
-	const struct flexcan_devtype_data *devtype_data;
+	struct flexcan_devtype_data devtype_data;
 	struct regulator *reg_xceiver;
 	struct flexcan_stop_mode stm;
 
@@ -600,7 +600,7 @@ static inline int flexcan_enter_stop_mode(struct flexcan_priv *priv)
 	priv->write(reg_mcr, &regs->mcr);
 
 	/* enable stop request */
-	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_SETUP_STOP_MODE_SCFW) {
+	if (priv->devtype_data.quirks & FLEXCAN_QUIRK_SETUP_STOP_MODE_SCFW) {
 		ret = flexcan_stop_mode_enable_scfw(priv, true);
 		if (ret < 0)
 			return ret;
@@ -619,7 +619,7 @@ static inline int flexcan_exit_stop_mode(struct flexcan_priv *priv)
 	int ret;
 
 	/* remove stop request */
-	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_SETUP_STOP_MODE_SCFW) {
+	if (priv->devtype_data.quirks & FLEXCAN_QUIRK_SETUP_STOP_MODE_SCFW) {
 		ret = flexcan_stop_mode_enable_scfw(priv, false);
 		if (ret < 0)
 			return ret;
@@ -1022,7 +1022,7 @@ static struct sk_buff *flexcan_mailbox_read(struct can_rx_offload *offload,
 
 	mb = flexcan_get_mb(priv, n);
 
-	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP) {
+	if (priv->devtype_data.quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP) {
 		u32 code;
 
 		do {
@@ -1087,7 +1087,7 @@ static struct sk_buff *flexcan_mailbox_read(struct can_rx_offload *offload,
 	}
 
  mark_as_read:
-	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP)
+	if (priv->devtype_data.quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP)
 		flexcan_write64(priv, FLEXCAN_IFLAG_MB(n), &regs->iflag1);
 	else
 		priv->write(FLEXCAN_IFLAG_RX_FIFO_AVAILABLE, &regs->iflag1);
@@ -1113,7 +1113,7 @@ static irqreturn_t flexcan_irq(int irq, void *dev_id)
 	enum can_state last_state = priv->can.state;
 
 	/* reception interrupt */
-	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP) {
+	if (priv->devtype_data.quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP) {
 		u64 reg_iflag_rx;
 		int ret;
 
@@ -1173,7 +1173,7 @@ static irqreturn_t flexcan_irq(int irq, void *dev_id)
 
 	/* state change interrupt or broken error state quirk fix is enabled */
 	if ((reg_esr & FLEXCAN_ESR_ERR_STATE) ||
-	    (priv->devtype_data->quirks & (FLEXCAN_QUIRK_BROKEN_WERR_STATE |
+	    (priv->devtype_data.quirks & (FLEXCAN_QUIRK_BROKEN_WERR_STATE |
 					   FLEXCAN_QUIRK_BROKEN_PERR_STATE)))
 		flexcan_irq_state(dev, reg_esr);
 
@@ -1195,11 +1195,11 @@ static irqreturn_t flexcan_irq(int irq, void *dev_id)
 	 * (1): enabled if FLEXCAN_QUIRK_BROKEN_WERR_STATE is enabled
 	 */
 	if ((last_state != priv->can.state) &&
-	    (priv->devtype_data->quirks & FLEXCAN_QUIRK_BROKEN_PERR_STATE) &&
+	    (priv->devtype_data.quirks & FLEXCAN_QUIRK_BROKEN_PERR_STATE) &&
 	    !(priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING)) {
 		switch (priv->can.state) {
 		case CAN_STATE_ERROR_ACTIVE:
-			if (priv->devtype_data->quirks &
+			if (priv->devtype_data.quirks &
 			    FLEXCAN_QUIRK_BROKEN_WERR_STATE)
 				flexcan_error_irq_enable(priv);
 			else
@@ -1423,13 +1423,13 @@ static int flexcan_rx_offload_setup(struct net_device *dev)
 	else
 		priv->mb_size = sizeof(struct flexcan_mb) + CAN_MAX_DLEN;
 
-	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_NR_MB_16)
+	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)
+	if (priv->devtype_data.quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP)
 		priv->tx_mb_reserved =
 			flexcan_get_mb(priv, FLEXCAN_TX_MB_RESERVED_OFF_TIMESTAMP);
 	else
@@ -1441,7 +1441,7 @@ static int flexcan_rx_offload_setup(struct net_device *dev)
 
 	priv->offload.mailbox_read = flexcan_mailbox_read;
 
-	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP) {
+	if (priv->devtype_data.quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP) {
 		priv->offload.mb_first = FLEXCAN_RX_MB_OFF_TIMESTAMP_FIRST;
 		priv->offload.mb_last = priv->mb_count - 2;
 
@@ -1506,7 +1506,7 @@ static int flexcan_chip_start(struct net_device *dev)
 	if (err)
 		goto out_chip_disable;
 
-	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_SUPPORT_ECC)
+	if (priv->devtype_data.quirks & FLEXCAN_QUIRK_SUPPORT_ECC)
 		flexcan_ram_init(dev);
 
 	flexcan_set_bittiming(dev);
@@ -1535,7 +1535,7 @@ static int flexcan_chip_start(struct net_device *dev)
 	 * - disable for timestamp mode
 	 * - enable for FIFO mode
 	 */
-	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP)
+	if (priv->devtype_data.quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP)
 		reg_mcr &= ~FLEXCAN_MCR_FEN;
 	else
 		reg_mcr |= FLEXCAN_MCR_FEN;
@@ -1586,7 +1586,7 @@ static int flexcan_chip_start(struct net_device *dev)
 	 * on most Flexcan cores, too. Otherwise we don't get
 	 * any error warning or passive interrupts.
 	 */
-	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_BROKEN_WERR_STATE ||
+	if (priv->devtype_data.quirks & FLEXCAN_QUIRK_BROKEN_WERR_STATE ||
 	    priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING)
 		reg_ctrl |= FLEXCAN_CTRL_ERR_MSK;
 	else
@@ -1599,7 +1599,7 @@ static int flexcan_chip_start(struct net_device *dev)
 	netdev_dbg(dev, "%s: writing ctrl=0x%08x", __func__, reg_ctrl);
 	priv->write(reg_ctrl, &regs->ctrl);
 
-	if ((priv->devtype_data->quirks & FLEXCAN_QUIRK_ENABLE_EACEN_RRS)) {
+	if ((priv->devtype_data.quirks & FLEXCAN_QUIRK_ENABLE_EACEN_RRS)) {
 		reg_ctrl2 = priv->read(&regs->ctrl2);
 		reg_ctrl2 |= FLEXCAN_CTRL2_EACEN | FLEXCAN_CTRL2_RRS;
 		priv->write(reg_ctrl2, &regs->ctrl2);
@@ -1631,7 +1631,7 @@ static int flexcan_chip_start(struct net_device *dev)
 		priv->write(reg_fdctrl, &regs->fdctrl);
 	}
 
-	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP) {
+	if (priv->devtype_data.quirks & FLEXCAN_QUIRK_USE_OFF_TIMESTAMP) {
 		for (i = priv->offload.mb_first; i <= priv->offload.mb_last; i++) {
 			mb = flexcan_get_mb(priv, i);
 			priv->write(FLEXCAN_MB_CODE_RX_EMPTY,
@@ -1659,7 +1659,7 @@ static int flexcan_chip_start(struct net_device *dev)
 	priv->write(0x0, &regs->rx14mask);
 	priv->write(0x0, &regs->rx15mask);
 
-	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_DISABLE_RXFG)
+	if (priv->devtype_data.quirks & FLEXCAN_QUIRK_DISABLE_RXFG)
 		priv->write(0x0, &regs->rxfgmask);
 
 	/* clear acceptance filters */
@@ -1673,7 +1673,7 @@ static int flexcan_chip_start(struct net_device *dev)
 	 * This also works around errata e5295 which generates false
 	 * positive memory errors and put the device in freeze mode.
 	 */
-	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_DISABLE_MECR) {
+	if (priv->devtype_data.quirks & FLEXCAN_QUIRK_DISABLE_MECR) {
 		/* Follow the protocol as described in "Detection
 		 * and Correction of Memory Errors" to write to
 		 * MECR register (step 1 - 5)
@@ -1799,7 +1799,7 @@ 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) {
+	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)
@@ -1845,7 +1845,7 @@ 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) {
+	if (priv->devtype_data.quirks & FLEXCAN_QUIRK_NR_IRQ_3) {
 		free_irq(priv->irq_err, dev);
 		free_irq(priv->irq_boff, dev);
 	}
@@ -2051,9 +2051,9 @@ static int flexcan_setup_stop_mode(struct platform_device *pdev)
 
 	priv = netdev_priv(dev);
 
-	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_SETUP_STOP_MODE_SCFW)
+	if (priv->devtype_data.quirks & FLEXCAN_QUIRK_SETUP_STOP_MODE_SCFW)
 		ret = flexcan_setup_stop_mode_scfw(pdev);
-	else if (priv->devtype_data->quirks & FLEXCAN_QUIRK_SETUP_STOP_MODE_GPR)
+	else if (priv->devtype_data.quirks & FLEXCAN_QUIRK_SETUP_STOP_MODE_GPR)
 		ret = flexcan_setup_stop_mode_gpr(pdev);
 	else
 		/* return 0 directly if doesn't support stop mode feature */
@@ -2202,7 +2202,7 @@ static int flexcan_probe(struct platform_device *pdev)
 	priv->clk_ipg = clk_ipg;
 	priv->clk_per = clk_per;
 	priv->clk_src = clk_src;
-	priv->devtype_data = devtype_data;
+	memcpy(&priv->devtype_data, devtype_data, sizeof(priv->devtype_data));
 	priv->reg_xceiver = reg_xceiver;
 
 	if (devtype_data->quirks & FLEXCAN_QUIRK_NR_IRQ_3) {
@@ -2218,7 +2218,7 @@ static int flexcan_probe(struct platform_device *pdev)
 		}
 	}
 
-	if (priv->devtype_data->quirks & FLEXCAN_QUIRK_SUPPORT_FD) {
+	if (devtype_data->quirks & FLEXCAN_QUIRK_SUPPORT_FD) {
 		priv->can.ctrlmode_supported |= CAN_CTRLMODE_FD |
 			CAN_CTRLMODE_FD_NON_ISO;
 		priv->can.bittiming_const = &flexcan_fd_bittiming_const;
-- 
2.32.0


^ permalink raw reply related	[flat|nested] 3+ messages in thread

* [RFC PATCH 2/2] can: flexcan: add ethtool support
  2022-01-04 13:20 [RFC PATCH 0/2] Change flexcan features at runtime Dario Binacchi
  2022-01-04 13:20 ` [RFC PATCH 1/2] can: flexcan: allow to change quirks " Dario Binacchi
@ 2022-01-04 13:20 ` Dario Binacchi
  1 sibling, 0 replies; 3+ messages in thread
From: Dario Binacchi @ 2022-01-04 13:20 UTC (permalink / raw)
  To: linux-kernel
  Cc: Michael Trimarchi, Dario Binacchi, David S. Miller,
	Jakub Kicinski, Marc Kleine-Budde, Wolfgang Grandegger,
	linux-can, netdev

For now, the driver information is added but the target is to change the
type of reception at runtime (RxFIFO enabled / disabled).

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>

---

 drivers/net/can/Makefile                      |   3 +
 drivers/net/can/flexcan.h                     | 107 ++++++++++++++++++
 drivers/net/can/flexcan_ethtool.c             |  29 +++++
 drivers/net/can/{flexcan.c => flexcan_main.c} |  96 +---------------
 4 files changed, 142 insertions(+), 93 deletions(-)
 create mode 100644 drivers/net/can/flexcan.h
 create mode 100644 drivers/net/can/flexcan_ethtool.c
 rename drivers/net/can/{flexcan.c => flexcan_main.c} (94%)

diff --git a/drivers/net/can/Makefile b/drivers/net/can/Makefile
index a2b4463d8480..34728cfa6430 100644
--- a/drivers/net/can/Makefile
+++ b/drivers/net/can/Makefile
@@ -16,7 +16,10 @@ obj-y				+= softing/
 obj-$(CONFIG_CAN_AT91)		+= at91_can.o
 obj-$(CONFIG_CAN_CC770)		+= cc770/
 obj-$(CONFIG_CAN_C_CAN)		+= c_can/
+
 obj-$(CONFIG_CAN_FLEXCAN)	+= flexcan.o
+flexcan-objs			+= flexcan_main.o flexcan_ethtool.o
+
 obj-$(CONFIG_CAN_GRCAN)		+= grcan.o
 obj-$(CONFIG_CAN_IFI_CANFD)	+= ifi_canfd/
 obj-$(CONFIG_CAN_JANZ_ICAN3)	+= janz-ican3.o
diff --git a/drivers/net/can/flexcan.h b/drivers/net/can/flexcan.h
new file mode 100644
index 000000000000..722b8edc3ff8
--- /dev/null
+++ b/drivers/net/can/flexcan.h
@@ -0,0 +1,107 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2022 Amarula Solutions
+ *
+ * Author: Dario Binacchi <dario.binacchi@amarulasolutions.com>
+ */
+
+#ifndef FLEXCAN_H
+#define FLEXCAN_H
+
+#include <linux/can/rx-offload.h>
+
+/* 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     MB
+ *                                Filter? connected?  Passive detection  ption in MB Supported?
+ * 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.
+ */
+
+/* [TR]WRN_INT not connected */
+#define FLEXCAN_QUIRK_BROKEN_WERR_STATE BIT(1)
+ /* Disable RX FIFO Global mask */
+#define FLEXCAN_QUIRK_DISABLE_RXFG BIT(2)
+/* Enable EACEN and RRS bit in ctrl2 */
+#define FLEXCAN_QUIRK_ENABLE_EACEN_RRS  BIT(3)
+/* Disable non-correctable errors interrupt and freeze mode */
+#define FLEXCAN_QUIRK_DISABLE_MECR BIT(4)
+/* Use timestamp based offloading */
+#define FLEXCAN_QUIRK_USE_OFF_TIMESTAMP BIT(5)
+/* No interrupt for error passive */
+#define FLEXCAN_QUIRK_BROKEN_PERR_STATE BIT(6)
+/* default to BE register access */
+#define FLEXCAN_QUIRK_DEFAULT_BIG_ENDIAN BIT(7)
+/* Setup stop mode with GPR to support wakeup */
+#define FLEXCAN_QUIRK_SETUP_STOP_MODE_GPR BIT(8)
+/* Support CAN-FD mode */
+#define FLEXCAN_QUIRK_SUPPORT_FD BIT(9)
+/* support memory detection and correction */
+#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)
+
+struct flexcan_devtype_data {
+	u32 quirks;		/* quirks needed for different IP cores */
+};
+
+struct flexcan_stop_mode {
+	struct regmap *gpr;
+	u8 req_gpr;
+	u8 req_bit;
+};
+
+struct flexcan_priv {
+	struct can_priv can;
+	struct can_rx_offload offload;
+	struct device *dev;
+
+	struct flexcan_regs __iomem *regs;
+	struct flexcan_mb __iomem *tx_mb;
+	struct flexcan_mb __iomem *tx_mb_reserved;
+	u8 tx_mb_idx;
+	u8 mb_count;
+	u8 mb_size;
+	u8 clk_src;	/* clock source of CAN Protocol Engine */
+	u8 scu_idx;
+
+	u64 rx_mask;
+	u64 tx_mask;
+	u32 reg_ctrl_default;
+
+	struct clk *clk_ipg;
+	struct clk *clk_per;
+	struct flexcan_devtype_data devtype_data;
+	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;
+
+	/* Read and Write APIs */
+	u32 (*read)(void __iomem *addr);
+	void (*write)(u32 val, void __iomem *addr);
+};
+
+void flexcan_set_ethtool_ops(struct net_device *dev);
+
+#endif /* FLEXCAN_H */
diff --git a/drivers/net/can/flexcan_ethtool.c b/drivers/net/can/flexcan_ethtool.c
new file mode 100644
index 000000000000..55c6b59bb6bf
--- /dev/null
+++ b/drivers/net/can/flexcan_ethtool.c
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2022 Amarula Solutions
+ *
+ * Author: Dario Binacchi <dario.binacchi@amarulasolutions.com>
+ */
+
+#include <linux/ethtool.h>
+#include <linux/kernel.h>
+#include <linux/platform_device.h>
+#include <linux/netdevice.h>
+#include <linux/can/dev.h>
+
+#include "flexcan.h"
+
+static void flexcan_get_drvinfo(struct net_device *netdev,
+				struct ethtool_drvinfo *info)
+{
+	strscpy(info->driver, "flexcan", sizeof(info->driver));
+}
+
+static const struct ethtool_ops flexcan_ethtool_ops = {
+	.get_drvinfo = flexcan_get_drvinfo,
+};
+
+void flexcan_set_ethtool_ops(struct net_device *netdev)
+{
+	netdev->ethtool_ops = &flexcan_ethtool_ops;
+}
diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan_main.c
similarity index 94%
rename from drivers/net/can/flexcan.c
rename to drivers/net/can/flexcan_main.c
index 223c32bf1f6c..e3e43e9cfbd6 100644
--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan_main.c
@@ -15,7 +15,6 @@
 #include <linux/can/dev.h>
 #include <linux/can/error.h>
 #include <linux/can/led.h>
-#include <linux/can/rx-offload.h>
 #include <linux/clk.h>
 #include <linux/delay.h>
 #include <linux/firmware/imx/sci.h>
@@ -33,6 +32,8 @@
 #include <linux/regmap.h>
 #include <linux/regulator/consumer.h>
 
+#include "flexcan.h"
+
 #define DRV_NAME			"flexcan"
 
 /* 8 for RX fifo and 2 error handling */
@@ -206,53 +207,6 @@
 
 #define FLEXCAN_TIMEOUT_US		(250)
 
-/* 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     MB
- *                                Filter? connected?  Passive detection  ption in MB Supported?
- * 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.
- */
-
-/* [TR]WRN_INT not connected */
-#define FLEXCAN_QUIRK_BROKEN_WERR_STATE BIT(1)
- /* Disable RX FIFO Global mask */
-#define FLEXCAN_QUIRK_DISABLE_RXFG BIT(2)
-/* Enable EACEN and RRS bit in ctrl2 */
-#define FLEXCAN_QUIRK_ENABLE_EACEN_RRS  BIT(3)
-/* Disable non-correctable errors interrupt and freeze mode */
-#define FLEXCAN_QUIRK_DISABLE_MECR BIT(4)
-/* Use timestamp based offloading */
-#define FLEXCAN_QUIRK_USE_OFF_TIMESTAMP BIT(5)
-/* No interrupt for error passive */
-#define FLEXCAN_QUIRK_BROKEN_PERR_STATE BIT(6)
-/* default to BE register access */
-#define FLEXCAN_QUIRK_DEFAULT_BIG_ENDIAN BIT(7)
-/* Setup stop mode with GPR to support wakeup */
-#define FLEXCAN_QUIRK_SETUP_STOP_MODE_GPR BIT(8)
-/* Support CAN-FD mode */
-#define FLEXCAN_QUIRK_SUPPORT_FD BIT(9)
-/* support memory detection and correction */
-#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 {
 	u32 can_ctrl;
@@ -339,51 +293,6 @@ struct flexcan_regs {
 
 static_assert(sizeof(struct flexcan_regs) ==  0x4 * 18 + 0xfb8);
 
-struct flexcan_devtype_data {
-	u32 quirks;		/* quirks needed for different IP cores */
-};
-
-struct flexcan_stop_mode {
-	struct regmap *gpr;
-	u8 req_gpr;
-	u8 req_bit;
-};
-
-struct flexcan_priv {
-	struct can_priv can;
-	struct can_rx_offload offload;
-	struct device *dev;
-
-	struct flexcan_regs __iomem *regs;
-	struct flexcan_mb __iomem *tx_mb;
-	struct flexcan_mb __iomem *tx_mb_reserved;
-	u8 tx_mb_idx;
-	u8 mb_count;
-	u8 mb_size;
-	u8 clk_src;	/* clock source of CAN Protocol Engine */
-	u8 scu_idx;
-
-	u64 rx_mask;
-	u64 tx_mask;
-	u32 reg_ctrl_default;
-
-	struct clk *clk_ipg;
-	struct clk *clk_per;
-	struct flexcan_devtype_data devtype_data;
-	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;
-
-	/* Read and Write APIs */
-	u32 (*read)(void __iomem *addr);
-	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,
@@ -2177,6 +2086,7 @@ static int flexcan_probe(struct platform_device *pdev)
 	SET_NETDEV_DEV(dev, &pdev->dev);
 
 	dev->netdev_ops = &flexcan_netdev_ops;
+	flexcan_set_ethtool_ops(dev);
 	dev->irq = irq;
 	dev->flags |= IFF_ECHO;
 
-- 
2.32.0


^ permalink raw reply related	[flat|nested] 3+ messages in thread

end of thread, other threads:[~2022-01-04 13:20 UTC | newest]

Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-01-04 13:20 [RFC PATCH 0/2] Change flexcan features at runtime Dario Binacchi
2022-01-04 13:20 ` [RFC PATCH 1/2] can: flexcan: allow to change quirks " Dario Binacchi
2022-01-04 13:20 ` [RFC PATCH 2/2] can: flexcan: add ethtool support Dario Binacchi

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