T113-s3 CAN linux 下已调通

liukia LV 3

看到有朋友裸板调通T113-s3的CAN, 我以调通linux 下的CAN驱动，与君共享

dtsi 中加入

can0: can@02504000 {
			compatible = "allwinner,sunxi-t113-can";
			reg = <0x0 0x02504000 0x0 0x400>;
			interrupts = <GIC_SPI 21 IRQ_TYPE_LEVEL_HIGH>;// 21+32 =53
			clocks = <&ccu CLK_BUS_CAN0>;
			clock-names = "can0";
			resets = <&ccu RST_BUS_CAN0>;
			status = "disabled";
		};
		can1: can@02504400 {
			compatible = "allwinner,sunxi-t113-can";
			reg = <0x0 0x02504400 0x0 0x400>;
			interrupts = <GIC_SPI 22 IRQ_TYPE_LEVEL_HIGH>;// 22+32 =54
			clocks = <&ccu CLK_BUS_CAN1>;
			clock-names = "can1";
			resets = <&ccu RST_BUS_CAN1>;
			status = "disabled";
		};

dts 中加入

can0_pins_a: can0_pins@0 {
		pins = "PB2", "PB3";
		function = "can0";
		drive-strength = <10>;
		bias-pull-up;
	};
	can0_pins_b: can0_pins@1 {
		pins = "PB2", "PB3";
		function = "gpio_in";
			};

	can1_pins_a: can1_pins@0 {
		pins = "PB4", "PB5";
		function = "can1";
		drive-strength = <10>;
		bias-pull-up;
	};		
	can1_pins_b: can1_pins@1 {
		pins = "PB4", "PB5";
		function = "gpio_in";
			};

。。

&can0 {
	pinctrl-names = "default";
	pinctrl-0 = <&can0_pins_a>;
	pinctrl-1 = <&can0_pins_b>;
	status = "okay";
};

&can1 {
	pinctrl-names = "default";
	pinctrl-0 = <&can1_pins_a>;
	pinctrl-1 = <&can1_pins_b>;
	status = "okay";
};

驱动文件放入 drivers/net/can/sun4i_can.c 这个文件是我改的

/*
 * sun4i_can.c - CAN bus controller driver for Allwinner SUN4I&SUN7I based SoCs
 *
 * Copyright (C) 2013 Peter Chen
 * Copyright (C) 2015 Gerhard Bertelsmann
 * All rights reserved.
 *
 * Parts of this software are based on (derived from) the SJA1000 code by:
 *   Copyright (C) 2014 Oliver Hartkopp <oliver.hartkopp@volkswagen.de>
 *   Copyright (C) 2007 Wolfgang Grandegger <wg@grandegger.com>
 *   Copyright (C) 2002-2007 Volkswagen Group Electronic Research
 *   Copyright (C) 2003 Matthias Brukner, Trajet Gmbh, Rebenring 33,
 *   38106 Braunschweig, GERMANY
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of Volkswagen nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * Alternatively, provided that this notice is retained in full, this
 * software may be distributed under the terms of the GNU General
 * Public License ("GPL") version 2, in which case the provisions of the
 * GPL apply INSTEAD OF those given above.
 *
 * The provided data structures and external interfaces from this code
 * are not restricted to be used by modules with a GPL compatible license.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
 * DAMAGE.
 *
 */

#include <linux/netdevice.h>
#include <linux/can.h>
#include <linux/can/dev.h>
#include <linux/can/error.h>
#include <linux/can/led.h>
#include <linux/clk.h>
#include <linux/reset.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/init.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>

#define DRV_NAME "sunxi_can"

/* Registers address (physical base address 0x01C2BC00) */
#define SUN4I_REG_MSEL_ADDR	0x0000	/* CAN Mode Select */
#define SUN4I_REG_CMD_ADDR	0x0004	/* CAN Command */
#define SUN4I_REG_STA_ADDR	0x0008	/* CAN Status */
#define SUN4I_REG_INT_ADDR	0x000c	/* CAN Interrupt Flag */
#define SUN4I_REG_INTEN_ADDR	0x0010	/* CAN Interrupt Enable */
#define SUN4I_REG_BTIME_ADDR	0x0014	/* CAN Bus Timing 0 */
#define SUN4I_REG_TEWL_ADDR	0x0018	/* CAN Tx Error Warning Limit */
#define SUN4I_REG_ERRC_ADDR	0x001c	/* CAN Error Counter */
#define SUN4I_REG_RMCNT_ADDR	0x0020	/* CAN Receive Message Counter */
#define SUN4I_REG_RBUFSA_ADDR	0x0024	/* CAN Receive Buffer Start Address */
#define SUN4I_REG_BUF0_ADDR	0x0040	/* CAN Tx/Rx Buffer 0 */
#define SUN4I_REG_BUF1_ADDR	0x0044	/* CAN Tx/Rx Buffer 1 */
#define SUN4I_REG_BUF2_ADDR	0x0048	/* CAN Tx/Rx Buffer 2 */
#define SUN4I_REG_BUF3_ADDR	0x004c	/* CAN Tx/Rx Buffer 3 */
#define SUN4I_REG_BUF4_ADDR	0x0050	/* CAN Tx/Rx Buffer 4 */
#define SUN4I_REG_BUF5_ADDR	0x0054	/* CAN Tx/Rx Buffer 5 */
#define SUN4I_REG_BUF6_ADDR	0x0058	/* CAN Tx/Rx Buffer 6 */
#define SUN4I_REG_BUF7_ADDR	0x005c	/* CAN Tx/Rx Buffer 7 */
#define SUN4I_REG_BUF8_ADDR	0x0060	/* CAN Tx/Rx Buffer 8 */
#define SUN4I_REG_BUF9_ADDR	0x0064	/* CAN Tx/Rx Buffer 9 */
#define SUN4I_REG_BUF10_ADDR	0x0068	/* CAN Tx/Rx Buffer 10 */
#define SUN4I_REG_BUF11_ADDR	0x006c	/* CAN Tx/Rx Buffer 11 */
#define SUN4I_REG_BUF12_ADDR	0x0070	/* CAN Tx/Rx Buffer 12 */
#define SUN4I_REG_ACPC_ADDR	0x0028	/* CAN Acceptance Code 0 */
#define SUN4I_REG_ACPM_ADDR	0x002c	/* CAN Acceptance Mask 0 */
#define SUN4I_REG_RBUF_RBACK_START_ADDR	0x0180	/* CAN transmit buffer start */
#define SUN4I_REG_RBUF_RBACK_END_ADDR	0x01b0	/* CAN transmit buffer end */

/* Controller Register Description */

/* mode select register (r/w)
 * offset:0x0000 default:0x0000_0001
 */
#define SUN4I_MSEL_SLEEP_MODE		(0x01 << 4) /* write in reset mode */
#define SUN4I_MSEL_WAKE_UP		(0x00 << 4)
#define SUN4I_MSEL_SINGLE_FILTER	(0x01 << 3) /* write in reset mode */
#define SUN4I_MSEL_DUAL_FILTERS		(0x00 << 3)
#define SUN4I_MSEL_LOOPBACK_MODE	BIT(2)
#define SUN4I_MSEL_LISTEN_ONLY_MODE	BIT(1)
#define SUN4I_MSEL_RESET_MODE		BIT(0)

/* command register (w)
 * offset:0x0004 default:0x0000_0000
 */
#define SUN4I_CMD_BUS_OFF_REQ	BIT(5)
#define SUN4I_CMD_SELF_RCV_REQ	BIT(4)
#define SUN4I_CMD_CLEAR_OR_FLAG	BIT(3)
#define SUN4I_CMD_RELEASE_RBUF	BIT(2)
#define SUN4I_CMD_ABORT_REQ	BIT(1)
#define SUN4I_CMD_TRANS_REQ	BIT(0)

/* status register (r)
 * offset:0x0008 default:0x0000_003c
 */
#define SUN4I_STA_BIT_ERR	(0x00 << 22)
#define SUN4I_STA_FORM_ERR	(0x01 << 22)
#define SUN4I_STA_STUFF_ERR	(0x02 << 22)
#define SUN4I_STA_OTHER_ERR	(0x03 << 22)
#define SUN4I_STA_MASK_ERR	(0x03 << 22)
#define SUN4I_STA_ERR_DIR	BIT(21)
#define SUN4I_STA_ERR_SEG_CODE	(0x1f << 16)
#define SUN4I_STA_START		(0x03 << 16)
#define SUN4I_STA_ID28_21	(0x02 << 16)
#define SUN4I_STA_ID20_18	(0x06 << 16)
#define SUN4I_STA_SRTR		(0x04 << 16)
#define SUN4I_STA_IDE		(0x05 << 16)
#define SUN4I_STA_ID17_13	(0x07 << 16)
#define SUN4I_STA_ID12_5	(0x0f << 16)
#define SUN4I_STA_ID4_0		(0x0e << 16)
#define SUN4I_STA_RTR		(0x0c << 16)
#define SUN4I_STA_RB1		(0x0d << 16)
#define SUN4I_STA_RB0		(0x09 << 16)
#define SUN4I_STA_DLEN		(0x0b << 16)
#define SUN4I_STA_DATA_FIELD	(0x0a << 16)
#define SUN4I_STA_CRC_SEQUENCE	(0x08 << 16)
#define SUN4I_STA_CRC_DELIMITER	(0x18 << 16)
#define SUN4I_STA_ACK		(0x19 << 16)
#define SUN4I_STA_ACK_DELIMITER	(0x1b << 16)
#define SUN4I_STA_END		(0x1a << 16)
#define SUN4I_STA_INTERMISSION	(0x12 << 16)
#define SUN4I_STA_ACTIVE_ERROR	(0x11 << 16)
#define SUN4I_STA_PASSIVE_ERROR	(0x16 << 16)
#define SUN4I_STA_TOLERATE_DOMINANT_BITS	(0x13 << 16)
#define SUN4I_STA_ERROR_DELIMITER	(0x17 << 16)
#define SUN4I_STA_OVERLOAD	(0x1c << 16)
#define SUN4I_STA_BUS_OFF	BIT(7)
#define SUN4I_STA_ERR_STA	BIT(6)
#define SUN4I_STA_TRANS_BUSY	BIT(5)
#define SUN4I_STA_RCV_BUSY	BIT(4)
#define SUN4I_STA_TRANS_OVER	BIT(3)
#define SUN4I_STA_TBUF_RDY	BIT(2)
#define SUN4I_STA_DATA_ORUN	BIT(1)
#define SUN4I_STA_RBUF_RDY	BIT(0)

/* interrupt register (r)
 * offset:0x000c default:0x0000_0000
 */
#define SUN4I_INT_BUS_ERR	BIT(7)
#define SUN4I_INT_ARB_LOST	BIT(6)
#define SUN4I_INT_ERR_PASSIVE	BIT(5)
#define SUN4I_INT_WAKEUP	BIT(4)
#define SUN4I_INT_DATA_OR	BIT(3)
#define SUN4I_INT_ERR_WRN	BIT(2)
#define SUN4I_INT_TBUF_VLD	BIT(1)
#define SUN4I_INT_RBUF_VLD	BIT(0)

/* interrupt enable register (r/w)
 * offset:0x0010 default:0x0000_0000
 */
#define SUN4I_INTEN_BERR	BIT(7)
#define SUN4I_INTEN_ARB_LOST	BIT(6)
#define SUN4I_INTEN_ERR_PASSIVE	BIT(5)
#define SUN4I_INTEN_WAKEUP	BIT(4)
#define SUN4I_INTEN_OR		BIT(3)
#define SUN4I_INTEN_ERR_WRN	BIT(2)
#define SUN4I_INTEN_TX		BIT(1)
#define SUN4I_INTEN_RX		BIT(0)

/* error code */
#define SUN4I_ERR_INRCV		(0x1 << 5)
#define SUN4I_ERR_INTRANS	(0x0 << 5)

/* filter mode */
#define SUN4I_FILTER_CLOSE	0
#define SUN4I_SINGLE_FLTER_MODE	1
#define SUN4I_DUAL_FILTER_MODE	2

/* message buffer flags */
#define SUN4I_MSG_EFF_FLAG	BIT(7)
#define SUN4I_MSG_RTR_FLAG	BIT(6)

/* max. number of interrupts handled in ISR */
#define SUN4I_CAN_MAX_IRQ	20
#define SUN4I_MODE_MAX_RETRIES	200

struct sun4ican_priv {
	struct can_priv can;
	void __iomem *base;
	struct clk *clk;
	struct reset_control *reset;
	spinlock_t cmdreg_lock;	/* lock for concurrent cmd register writes */
};

static const struct can_bittiming_const sun4ican_bittiming_const = {
	.name = DRV_NAME,
	.tseg1_min = 1,
	.tseg1_max = 16,
	.tseg2_min = 1,
	.tseg2_max = 8,
	.sjw_max = 4,
	.brp_min = 1,
	.brp_max = 64,
	.brp_inc = 1,
};

static void sun4i_can_write_cmdreg(struct sun4ican_priv *priv, u8 val)
{
	unsigned long flags;

	spin_lock_irqsave(&priv->cmdreg_lock, flags);
	writel(val, priv->base + SUN4I_REG_CMD_ADDR);
	spin_unlock_irqrestore(&priv->cmdreg_lock, flags);
}

static int set_normal_mode(struct net_device *dev)
{
	struct sun4ican_priv *priv = netdev_priv(dev);
	int retry = SUN4I_MODE_MAX_RETRIES;
	u32 mod_reg_val = 0;

	do {
		mod_reg_val = readl(priv->base + SUN4I_REG_MSEL_ADDR);
		mod_reg_val &= ~SUN4I_MSEL_RESET_MODE;
		writel(mod_reg_val, priv->base + SUN4I_REG_MSEL_ADDR);
	} while (retry-- && (mod_reg_val & SUN4I_MSEL_RESET_MODE));

	if (readl(priv->base + SUN4I_REG_MSEL_ADDR) & SUN4I_MSEL_RESET_MODE) {
		netdev_err(dev,
			   "setting controller into normal mode failed!\n");
		return -ETIMEDOUT;
	}

	return 0;
}

static int set_reset_mode(struct net_device *dev)
{
	struct sun4ican_priv *priv = netdev_priv(dev);
	int retry = SUN4I_MODE_MAX_RETRIES;
	u32 mod_reg_val = 0;

	do {
		mod_reg_val = readl(priv->base + SUN4I_REG_MSEL_ADDR);
		mod_reg_val |= SUN4I_MSEL_RESET_MODE;
		writel(mod_reg_val, priv->base + SUN4I_REG_MSEL_ADDR);

	} while (retry-- && !(mod_reg_val & SUN4I_MSEL_RESET_MODE));
	
	if (!(readl(priv->base + SUN4I_REG_MSEL_ADDR) &
	      SUN4I_MSEL_RESET_MODE)) {
		netdev_err(dev, "setting controller into reset mode failed!\n");
		return -ETIMEDOUT;
	}

	return 0;
}

/* bittiming is called in reset_mode only */
static int sun4ican_set_bittiming(struct net_device *dev)
{
	struct sun4ican_priv *priv = netdev_priv(dev);
	struct can_bittiming *bt = &priv->can.bittiming;
	u32 cfg;

	cfg = ((bt->brp - 1) & 0x3FF) |
	     (((bt->sjw - 1) & 0x3) << 14) |
	     (((bt->prop_seg + bt->phase_seg1 - 1) & 0xf) << 16) |
	     (((bt->phase_seg2 - 1) & 0x7) << 20);
	if (priv->can.ctrlmode & CAN_CTRLMODE_3_SAMPLES)
		cfg |= 0x800000;

	netdev_dbg(dev, "setting BITTIMING=0x%08x\n", cfg);
	writel(cfg, priv->base + SUN4I_REG_BTIME_ADDR);

	return 0;
}

static int sun4ican_get_berr_counter(const struct net_device *dev,
				     struct can_berr_counter *bec)
{
	struct sun4ican_priv *priv = netdev_priv(dev);
	u32 errors;
	int err;

	err = clk_prepare_enable(priv->clk);
	if (err) {
		netdev_err(dev, "could not enable clock\n");
		return err;
	}

	errors = readl(priv->base + SUN4I_REG_ERRC_ADDR);

	bec->txerr = errors & 0xFF;
	bec->rxerr = (errors >> 16) & 0xFF;

	clk_disable_unprepare(priv->clk);

	return 0;
}

static int sun4i_can_start(struct net_device *dev)
{
	struct sun4ican_priv *priv = netdev_priv(dev);
	int err;
	u32 mod_reg_val;

	/* we need to enter the reset mode */
	err = set_reset_mode(dev);
	if (err) {
		netdev_err(dev, "could not enter reset mode\n");
		return err;
	}

	/* set filters - we accept all */
	writel(0x00000000, priv->base + SUN4I_REG_ACPC_ADDR);
	writel(0xFFFFFFFF, priv->base + SUN4I_REG_ACPM_ADDR);

	/* clear error counters and error code capture */
	writel(0, priv->base + SUN4I_REG_ERRC_ADDR);

	/* enable interrupts */
	if (priv->can.ctrlmode & CAN_CTRLMODE_BERR_REPORTING)
		writel(0xFF, priv->base + SUN4I_REG_INTEN_ADDR);
	else
		writel(0xFF & ~SUN4I_INTEN_BERR,
		       priv->base + SUN4I_REG_INTEN_ADDR);

	/* enter the selected mode */
	mod_reg_val = readl(priv->base + SUN4I_REG_MSEL_ADDR);
	if (priv->can.ctrlmode & CAN_CTRLMODE_LOOPBACK)
		mod_reg_val |= SUN4I_MSEL_LOOPBACK_MODE;
	else if (priv->can.ctrlmode & CAN_CTRLMODE_LISTENONLY)
		mod_reg_val |= SUN4I_MSEL_LISTEN_ONLY_MODE;
	writel(mod_reg_val, priv->base + SUN4I_REG_MSEL_ADDR);

	err = sun4ican_set_bittiming(dev);
	if (err)
		return err;

	/* we are ready to enter the normal mode */
	err = set_normal_mode(dev);
	if (err) {
		netdev_err(dev, "could not enter normal mode\n");
		return err;
	}

	priv->can.state = CAN_STATE_ERROR_ACTIVE;

	return 0;
}

static int sun4i_can_stop(struct net_device *dev)
{
	struct sun4ican_priv *priv = netdev_priv(dev);
	int err;

	priv->can.state = CAN_STATE_STOPPED;
	/* we need to enter reset mode */
	err = set_reset_mode(dev);
	if (err) {
		netdev_err(dev, "could not enter reset mode\n");
		return err;
	}

	/* disable all interrupts */
	writel(0, priv->base + SUN4I_REG_INTEN_ADDR);

	return 0;
}

static int sun4ican_set_mode(struct net_device *dev, enum can_mode mode)
{
	int err;

	switch (mode) {
	case CAN_MODE_START:
		err = sun4i_can_start(dev);
		if (err) {
			netdev_err(dev, "starting CAN controller failed!\n");
			return err;
		}
		if (netif_queue_stopped(dev))
			netif_wake_queue(dev);
		break;

	default:
		return -EOPNOTSUPP;
	}
	return 0;
}

/* transmit a CAN message
 * message layout in the sk_buff should be like this:
 * xx xx xx xx         ff         ll 00 11 22 33 44 55 66 77
 * [ can_id ] [flags] [len] [can data (up to 8 bytes]
 */
static netdev_tx_t sun4ican_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct sun4ican_priv *priv = netdev_priv(dev);
	struct can_frame *cf = (struct can_frame *)skb->data;
	u8 dlc;
	u32 dreg, msg_flag_n;
	canid_t id;
	int i;

	if (can_dropped_invalid_skb(dev, skb))
		return NETDEV_TX_OK;

	netif_stop_queue(dev);

	id = cf->can_id;
	dlc = cf->can_dlc;
	msg_flag_n = dlc;

	if (id & CAN_RTR_FLAG)
		msg_flag_n |= SUN4I_MSG_RTR_FLAG;

	if (id & CAN_EFF_FLAG) {
		msg_flag_n |= SUN4I_MSG_EFF_FLAG;
		dreg = SUN4I_REG_BUF5_ADDR;
		writel((id >> 21) & 0xFF, priv->base + SUN4I_REG_BUF1_ADDR);
		writel((id >> 13) & 0xFF, priv->base + SUN4I_REG_BUF2_ADDR);
		writel((id >> 5)  & 0xFF, priv->base + SUN4I_REG_BUF3_ADDR);
		writel((id << 3)  & 0xF8, priv->base + SUN4I_REG_BUF4_ADDR);
	} else {
		dreg = SUN4I_REG_BUF3_ADDR;
		writel((id >> 3) & 0xFF, priv->base + SUN4I_REG_BUF1_ADDR);
		writel((id << 5) & 0xE0, priv->base + SUN4I_REG_BUF2_ADDR);
	}

	for (i = 0; i < dlc; i++)
		writel(cf->data[i], priv->base + (dreg + i * 4));

	writel(msg_flag_n, priv->base + SUN4I_REG_BUF0_ADDR);

	can_put_echo_skb(skb, dev, 0);

	if (priv->can.ctrlmode & CAN_CTRLMODE_LOOPBACK)
		sun4i_can_write_cmdreg(priv, SUN4I_CMD_SELF_RCV_REQ);
	else
		sun4i_can_write_cmdreg(priv, SUN4I_CMD_TRANS_REQ);

	return NETDEV_TX_OK;
}

static void sun4i_can_rx(struct net_device *dev)
{
	struct sun4ican_priv *priv = netdev_priv(dev);
	struct net_device_stats *stats = &dev->stats;
	struct can_frame *cf;
	struct sk_buff *skb;
	u8 fi;
	u32 dreg;
	canid_t id;
	int i;

	/* create zero'ed CAN frame buffer */
	skb = alloc_can_skb(dev, &cf);
	if (!skb)
		return;

	fi = readl(priv->base + SUN4I_REG_BUF0_ADDR);
	cf->can_dlc = get_can_dlc(fi & 0x0F);
	if (fi & SUN4I_MSG_EFF_FLAG) {
		dreg = SUN4I_REG_BUF5_ADDR;
		id = (readl(priv->base + SUN4I_REG_BUF1_ADDR) << 21) |
		     (readl(priv->base + SUN4I_REG_BUF2_ADDR) << 13) |
		     (readl(priv->base + SUN4I_REG_BUF3_ADDR) << 5)  |
		    ((readl(priv->base + SUN4I_REG_BUF4_ADDR) >> 3)  & 0x1f);
		id |= CAN_EFF_FLAG;
	} else {
		dreg = SUN4I_REG_BUF3_ADDR;
		id = (readl(priv->base + SUN4I_REG_BUF1_ADDR) << 3) |
		    ((readl(priv->base + SUN4I_REG_BUF2_ADDR) >> 5) & 0x7);
	}

	/* remote frame ? */
	if (fi & SUN4I_MSG_RTR_FLAG)
		id |= CAN_RTR_FLAG;
	else
		for (i = 0; i < cf->can_dlc; i++)
			cf->data[i] = readl(priv->base + dreg + i * 4);

	cf->can_id = id;

	sun4i_can_write_cmdreg(priv, SUN4I_CMD_RELEASE_RBUF);

	stats->rx_packets++;
	stats->rx_bytes += cf->can_dlc;
	netif_rx(skb);

	can_led_event(dev, CAN_LED_EVENT_RX);
}

static int sun4i_can_err(struct net_device *dev, u8 isrc, u8 status)
{
	struct sun4ican_priv *priv = netdev_priv(dev);
	struct net_device_stats *stats = &dev->stats;
	struct can_frame *cf;
	struct sk_buff *skb;
	enum can_state state = priv->can.state;
	enum can_state rx_state, tx_state;
	unsigned int rxerr, txerr, errc;
	u32 ecc, alc;

	/* we don't skip if alloc fails because we want the stats anyhow */
	skb = alloc_can_err_skb(dev, &cf);

	errc = readl(priv->base + SUN4I_REG_ERRC_ADDR);
	rxerr = (errc >> 16) & 0xFF;
	txerr = errc & 0xFF;

	if (skb) {
		cf->data[6] = txerr;
		cf->data[7] = rxerr;
	}

	if (isrc & SUN4I_INT_DATA_OR) {
		/* data overrun interrupt */
		netdev_dbg(dev, "data overrun interrupt\n");
		if (likely(skb)) {
			cf->can_id |= CAN_ERR_CRTL;
			cf->data[1] = CAN_ERR_CRTL_RX_OVERFLOW;
		}
		stats->rx_over_errors++;
		stats->rx_errors++;

		/* reset the CAN IP by entering reset mode
		 * ignoring timeout error
		 */
		set_reset_mode(dev);
		set_normal_mode(dev);

		/* clear bit */
		sun4i_can_write_cmdreg(priv, SUN4I_CMD_CLEAR_OR_FLAG);
	}
	if (isrc & SUN4I_INT_ERR_WRN) {
		/* error warning interrupt */
		netdev_dbg(dev, "error warning interrupt\n");

		if (status & SUN4I_STA_BUS_OFF)
			state = CAN_STATE_BUS_OFF;
		else if (status & SUN4I_STA_ERR_STA)
			state = CAN_STATE_ERROR_WARNING;
		else
			state = CAN_STATE_ERROR_ACTIVE;
	}
	if (isrc & SUN4I_INT_BUS_ERR) {
		/* bus error interrupt */
		netdev_dbg(dev, "bus error interrupt\n");
		priv->can.can_stats.bus_error++;
		stats->rx_errors++;

		if (likely(skb)) {
			ecc = readl(priv->base + SUN4I_REG_STA_ADDR);

			cf->can_id |= CAN_ERR_PROT | CAN_ERR_BUSERROR;

			switch (ecc & SUN4I_STA_MASK_ERR) {
			case SUN4I_STA_BIT_ERR:
				cf->data[2] |= CAN_ERR_PROT_BIT;
				break;
			case SUN4I_STA_FORM_ERR:
				cf->data[2] |= CAN_ERR_PROT_FORM;
				break;
			case SUN4I_STA_STUFF_ERR:
				cf->data[2] |= CAN_ERR_PROT_STUFF;
				break;
			default:
				cf->data[3] = (ecc & SUN4I_STA_ERR_SEG_CODE)
					       >> 16;
				break;
			}
			/* error occurred during transmission? */
			if ((ecc & SUN4I_STA_ERR_DIR) == 0)
				cf->data[2] |= CAN_ERR_PROT_TX;
		}
	}
	if (isrc & SUN4I_INT_ERR_PASSIVE) {
		/* error passive interrupt */
		netdev_dbg(dev, "error passive interrupt\n");
		if (state == CAN_STATE_ERROR_PASSIVE)
			state = CAN_STATE_ERROR_WARNING;
		else
			state = CAN_STATE_ERROR_PASSIVE;
	}
	if (isrc & SUN4I_INT_ARB_LOST) {
		/* arbitration lost interrupt */
		netdev_dbg(dev, "arbitration lost interrupt\n");
		alc = readl(priv->base + SUN4I_REG_STA_ADDR);
		priv->can.can_stats.arbitration_lost++;
		stats->tx_errors++;
		if (likely(skb)) {
			cf->can_id |= CAN_ERR_LOSTARB;
			cf->data[0] = (alc >> 8) & 0x1f;
		}
	}

	if (state != priv->can.state) {
		tx_state = txerr >= rxerr ? state : 0;
		rx_state = txerr <= rxerr ? state : 0;

		if (likely(skb))
			can_change_state(dev, cf, tx_state, rx_state);
		else
			priv->can.state = state;
		if (state == CAN_STATE_BUS_OFF)
			can_bus_off(dev);
	}

	if (likely(skb)) {
		stats->rx_packets++;
		stats->rx_bytes += cf->can_dlc;
		netif_rx(skb);
	} else {
		return -ENOMEM;
	}

	return 0;
}

static irqreturn_t sun4i_can_interrupt(int irq, void *dev_id)
{
	struct net_device *dev = (struct net_device *)dev_id;
	struct sun4ican_priv *priv = netdev_priv(dev);
	struct net_device_stats *stats = &dev->stats;
	u8 isrc, status;
	int n = 0;

	while ((isrc = readl(priv->base + SUN4I_REG_INT_ADDR)) &&
	       (n < SUN4I_CAN_MAX_IRQ)) {
		n++;
		status = readl(priv->base + SUN4I_REG_STA_ADDR);

		if (isrc & SUN4I_INT_WAKEUP)
			netdev_warn(dev, "wakeup interrupt\n");

		if (isrc & SUN4I_INT_TBUF_VLD) {
			/* transmission complete interrupt */
			stats->tx_bytes +=
			    readl(priv->base +
				  SUN4I_REG_RBUF_RBACK_START_ADDR) & 0xf;
			stats->tx_packets++;
			can_get_echo_skb(dev, 0);
			netif_wake_queue(dev);
			can_led_event(dev, CAN_LED_EVENT_TX);
		}
		if ((isrc & SUN4I_INT_RBUF_VLD) &&
		    !(isrc & SUN4I_INT_DATA_OR)) {
			/* receive interrupt - don't read if overrun occurred */
			while (status & SUN4I_STA_RBUF_RDY) {
				/* RX buffer is not empty */
				sun4i_can_rx(dev);
				status = readl(priv->base + SUN4I_REG_STA_ADDR);
			}
		}
		if (isrc &
		    (SUN4I_INT_DATA_OR | SUN4I_INT_ERR_WRN | SUN4I_INT_BUS_ERR |
		     SUN4I_INT_ERR_PASSIVE | SUN4I_INT_ARB_LOST)) {
			/* error interrupt */
			if (sun4i_can_err(dev, isrc, status))
				netdev_err(dev, "can't allocate buffer - clearing pending interrupts\n");
		}
		/* clear interrupts */
		writel(isrc, priv->base + SUN4I_REG_INT_ADDR);
		readl(priv->base + SUN4I_REG_INT_ADDR);
	}
	if (n >= SUN4I_CAN_MAX_IRQ)
		netdev_dbg(dev, "%d messages handled in ISR", n);

	return (n) ? IRQ_HANDLED : IRQ_NONE;
}

static int sun4ican_open(struct net_device *dev)
{
	struct sun4ican_priv *priv = netdev_priv(dev);
	int err;

	/* common open */
	err = open_candev(dev);
	if (err)
		return err;

	/* register interrupt handler */
	err = request_irq(dev->irq, sun4i_can_interrupt, 0, dev->name, dev);
	if (err) {
		netdev_err(dev, "request_irq err: %d\n", err);
		goto exit_irq;
	}

	err = reset_control_assert(priv->reset);
	if (err) {
		netdev_err(dev, "[CAN] Unable to assert reset clock return %x\n", PTR_RET(priv->clk));
		goto exit_clock;
	}
	err =reset_control_deassert(priv->reset) ;
	if (err) {
		netdev_err(dev,"[CAN] Unable to deassert reset clock return %x\n", PTR_RET(priv->clk));
		goto exit_clock;
	}

	/* turn on clocking for CAN peripheral block */
	err = clk_prepare_enable(priv->clk);
	if (err) {
		netdev_err(dev, "could not enable CAN peripheral clock\n");
		goto exit_clock;
	}

	err = sun4i_can_start(dev);
	if (err) {
		netdev_err(dev, "could not start CAN peripheral\n");
		goto exit_can_start;
	}

	can_led_event(dev, CAN_LED_EVENT_OPEN);
	netif_start_queue(dev);

	return 0;

exit_can_start:
	clk_disable_unprepare(priv->clk);
exit_clock:
	free_irq(dev->irq, dev);
exit_irq:
	close_candev(dev);
	return err;
}

static int sun4ican_close(struct net_device *dev)
{
	struct sun4ican_priv *priv = netdev_priv(dev);

	netif_stop_queue(dev);
	sun4i_can_stop(dev);
	clk_disable_unprepare(priv->clk);

	free_irq(dev->irq, dev);
	close_candev(dev);
	can_led_event(dev, CAN_LED_EVENT_STOP);

	return 0;
}

static const struct net_device_ops sun4ican_netdev_ops = {
	.ndo_open = sun4ican_open,
	.ndo_stop = sun4ican_close,
	.ndo_start_xmit = sun4ican_start_xmit,
};

static const struct of_device_id sun4ican_of_match[] = {
	{.compatible = "allwinner,sunxi-t113-can"},
	{},
};

MODULE_DEVICE_TABLE(of, sun4ican_of_match);

static int sun4ican_remove(struct platform_device *pdev)
{
	struct net_device *dev = platform_get_drvdata(pdev);

	unregister_netdev(dev);
	free_candev(dev);

	return 0;
}

static int sun4ican_probe(struct platform_device *pdev)
{
	struct device_node *np = pdev->dev.of_node;
	struct resource *mem_res;
	struct clk *clk;
	void __iomem *addr;
	int err, irq;
	struct net_device *dev;
	struct sun4ican_priv *priv;
	struct reset_control *reset;
	clk = of_clk_get(np, 0);
	if (IS_ERR(clk)) {
		dev_err(&pdev->dev, "unable to request clock\n");
		err = -ENODEV;
		goto exit;
	}

	irq = platform_get_irq(pdev, 0);
	if (irq < 0) {
		dev_err(&pdev->dev, "could not get a valid irq\n");
		err = -ENODEV;
		goto exit;
	}

	mem_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
	//dev_info(&pdev->dev, "CAN device phy_addr 0x%x)\n",(u32)mem_res->start);
	addr = devm_ioremap_resource(&pdev->dev, mem_res);

	if (IS_ERR(addr)) {
		err = -EBUSY;
		goto exit;
	}

	reset=devm_reset_control_get(&pdev->dev, NULL);
		if (IS_ERR_OR_NULL(reset)) {
				dev_err(&pdev->dev,"[can] Unable to acquire reset clock , return %x\n",PTR_RET(reset));
			err =  -ENXIO;
			goto  exit;
		}

	dev = alloc_candev(sizeof(struct sun4ican_priv), 1);
	if (!dev) {
		dev_err(&pdev->dev,"could not allocate memory for CAN device\n");
		err = -ENOMEM;
		goto exit;
	}

	dev->netdev_ops = &sun4ican_netdev_ops;
	dev->irq = irq;
	dev->flags |= IFF_ECHO;

	priv = netdev_priv(dev);
	priv->can.clock.freq = clk_get_rate(clk);
	priv->can.bittiming_const = &sun4ican_bittiming_const;
	priv->can.do_set_mode = sun4ican_set_mode;
	priv->can.do_get_berr_counter = sun4ican_get_berr_counter;
	priv->can.ctrlmode_supported = CAN_CTRLMODE_BERR_REPORTING |
				       CAN_CTRLMODE_LISTENONLY |
				       CAN_CTRLMODE_LOOPBACK |
				       CAN_CTRLMODE_3_SAMPLES;
	priv->base = addr;
	priv->clk = clk;
	priv->reset= reset;
	spin_lock_init(&priv->cmdreg_lock);

	platform_set_drvdata(pdev, dev);
	SET_NETDEV_DEV(dev, &pdev->dev);

	err = register_candev(dev);
	if (err) {
		dev_err(&pdev->dev, "registering %s failed (err=%d)\n",
			DRV_NAME, err);
		goto exit_free;
	}
	devm_can_led_init(dev);

	dev_info(&pdev->dev, "device registered ( base=%p, irq=%d )\n",
		 priv->base, dev->irq);

	return 0;

exit_free:
	free_candev(dev);
exit:
	return err;
}

static struct platform_driver sun4i_can_driver = {
	.driver = {
		.name = DRV_NAME,
		.of_match_table = sun4ican_of_match,
	},
	.probe = sun4ican_probe,
	.remove = sun4ican_remove,
};

module_platform_driver(sun4i_can_driver);

MODULE_AUTHOR("Peter Chen <xingkongcp@gmail.com>");
MODULE_AUTHOR("Gerhard Bertelsmann <info@gerhard-bertelsmann.de>");
MODULE_LICENSE("Dual BSD/GPL");
MODULE_DESCRIPTION("CAN driver for Allwinner SoCs (T113-s3)");

drivers/net/can/Kconfig 加入
粗体字

config CAN_SUN8I
        tristate "Sun8i CAN bus controller"
        default n
        help
        This is the Sun8i CAN BUS driver for android system by peter chen.

drivers/net/can/Makefile 加入

obj-$(CONFIG_CAN_SUN8I)		+= sun4i_can.o

a892755772 LV 5

@liukia 大侠有应用的测试程序吗贴上来看看吧想知道怎么初始化发送接收数据

linsen LV 7

@a892755772 6ad8fb50-d634-4dbc-8f37-ff469bfee22f-lQLPJxabzkM18HzNAzbNBgewfnFcmqcitrEDAFag9MB1AA_1543_822.png

a892755772 LV 5

@lansecd 读取压力测试怎么样我这边1M速度 8000多帧会出现丢帧 2500帧才稳定

linsen LV 7

@a892755772 压力测试没啥问题，老哥USB1用了没，配置CAN工作后，USB1做HOST没反应了，有遇到不

a892755772 LV 5

@lansecd USB1 没有用啊

Observer LV 2

@a892755772 有解决吗，我也遇到类似的问题

linsen LV 7

@lizh023 还没有找到问题，CAN0会影响USB1，CAN1没事

Observer LV 2

This post is deleted!

Observer LV 2

@lansecd @a892755772 刚刚没有描述清楚我的问题，我也遇到压力测试会丢帧的问题，这边1M速度 75%总线负载下测试！有时候也会出现CAN掉线异常状态。你们有思路可以分享一下吗

a892755772 LV 5

@lizh023 我发现禁用网络就没有问题就是不连接WiFi 把掉网线。猜测是CAN在Linux这边认为是网络设备其他网络设备通讯导致丢帧

msh410278586 LV 5

@lansecd
你好，我按照上面修改，执行cansend can0 123#1122334455667788会报错，跪求大佬给看看吧！

root@TinaLinux:/# cansend can0 123#1122334455667788
interface = can0, family = 29, type = 3, proto = 1[   55.350220] sunxi_can 2504000.can can0: error warning interrupt
[   55.360888] sunxi_can 2504000.can can0: bus error interrupt
[   55.367103] sunxi_can 2504000.can can0: New error state: 1
root@TinaLinux:/# ifconfig can0
can0      Link encap:UNSPEC  HWaddr 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00  
          UP RUNNING NOARP  MTU:16  Metric:1
          RX packets:1 errors:1 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:10 
          RX bytes:8 (8.0 B)  TX bytes:0 (0.0 B)
          Interrupt:45 
root@TinaLinux:/# ip -detail link show can0
2: can0: <NOARP,UP,LOWER_UP,ECHO> mtu 16 qdisc pfifo_fast state UP mode DEFAULT group default qlen 10
    link/can  promiscuity 0 minmtu 0 maxmtu 0 
    can state ERROR-WARNING (berr-counter tx 183 rx 0) restart-ms 0 
	  bitrate 125000 sample-point 0.875
	  tq 500 prop-seg 6 phase-seg1 7 phase-seg2 2 sjw 1 brp 12
	  sunxi_can: tseg1 1..16 tseg2 1..8 sjw 1..4 brp 1..64 brp_inc 1
	  clock 24000000 numtxqueues 1 numrxqueues 1 gso_max_size 65536 gso_max_segs 65535

下面是启动信息

[    0.000000] Booting Linux on physical CPU 0x0
[    0.000000] Linux version 5.4.61 (t113@t113) (arm-openwrt-linux-muslgnueabi-gcc.bin (OpenWrt/CodeSourcery GCC 8.3.0 2021.08) 8.3.0, GNU ld (GNU Binutils) 2.28) #269 SMP PREEMPT Mon Oct 17 08:37:45 UTC 2022
[    0.000000] CPU: ARMv7 Processor [410fc075] revision 5 (ARMv7), cr=10c5387d
[    0.000000] CPU: div instructions available: patching division code
[    0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT aliasing instruction cache
[    0.000000] OF: fdt: Machine model: sun8iw20
[    0.000000] printk: bootconsole [earlycon0] enabled
[    0.000000] Memory policy: Data cache writealloc
[    0.000000] cma: Reserved 4 MiB at 0x47c00000
[    0.000000] On node 0 totalpages: 32768
[    0.000000]   Normal zone: 256 pages used for memmap
[    0.000000]   Normal zone: 0 pages reserved
[    0.000000]   Normal zone: 32768 pages, LIFO batch:7
[    0.000000] psci: probing for conduit method from DT.
[    0.000000] psci: PSCIv1.0 detected in firmware.
[    0.000000] psci: Using standard PSCI v0.2 function IDs
[    0.000000] psci: MIGRATE_INFO_TYPE not supported.
[    0.000000] psci: SMC Calling Convention v1.0
[    0.000000] percpu: Embedded 15 pages/cpu s30412 r8192 d22836 u61440
[    0.000000] pcpu-alloc: s30412 r8192 d22836 u61440 alloc=15*4096
[    0.000000] pcpu-alloc: [0] 0 [0] 1 
[    0.000000] Built 1 zonelists, mobility grouping on.  Total pages: 32512
[    0.000000] Kernel command line: earlyprintk=sunxi-uart,0x02500C00 clk_ignore_unused initcall_debug=0 console=ttyS3,115200 rootdelay=2 loglevel=8 root=/dev/mmcblk0p5 init=/pseudo_init partitions=boot-resource@mmcblk0p1:env@mmcblk0p2:env-redund@mmcblk0p3:boot@mmcblk0p4:rootfs@mmcblk0p5:private@mmcblk0p6:rootfs_data@mmcblk0p7:UDISK@mmcblk0p8 cma=4M snum= mac_addr= wifi_mac= bt_mac= specialstr= gpt=1 androidboot.mode=normal androidboot.hardware=sun8iw20p1 boot_type=2 androidboot.boot_type=2 gpt=1 uboot_message=2018.05-g2a1965a-dirty(07/10/2022-02:50:57) mbr_offset=1032192 disp_reserve=2457600,0x43f06000 androidboot.dramsize=128 
[    0.000000] Dentry cache hash table entries: 16384 (order: 4, 65536 bytes, linear)
[    0.000000] Inode-cache hash table entries: 8192 (order: 3, 32768 bytes, linear)
[    0.000000] mem auto-init: stack:off, heap alloc:off, heap free:off
[    0.000000] Memory: 104088K/131072K available (6144K kernel code, 281K rwdata, 1624K rodata, 1024K init, 1168K bss, 22888K reserved, 4096K cma-reserved)
[    0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1
[    0.000000] rcu: Preemptible hierarchical RCU implementation.
[    0.000000] 	Tasks RCU enabled.
[    0.000000] rcu: RCU calculated value of scheduler-enlistment delay is 10 jiffies.
[    0.000000] NR_IRQS: 16, nr_irqs: 16, preallocated irqs: 16
[    0.000000] random: get_random_bytes called from start_kernel+0x258/0x3dc with crng_init=0
[    0.000000] arch_timer: cp15 timer(s) running at 24.00MHz (phys).
[    0.000000] clocksource: arch_sys_counter: mask: 0xffffffffffffff max_cycles: 0x588fe9dc0, max_idle_ns: 440795202592 ns
[    0.000005] sched_clock: 56 bits at 24MHz, resolution 41ns, wraps every 4398046511097ns
[    0.008007] Switching to timer-based delay loop, resolution 41ns
[    0.014187] clocksource: timer: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 79635851949 ns
[    0.023900] Calibrating delay loop (skipped), value calculated using timer frequency.. 48.00 BogoMIPS (lpj=240000)
[    0.034266] pid_max: default: 32768 minimum: 301
[    0.039007] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[    0.046346] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes, linear)
[    0.054661] CPU: Testing write buffer coherency: ok
[    0.059860] /cpus/cpu@0 missing clock-frequency property
[    0.065202] /cpus/cpu@1 missing clock-frequency property
[    0.070539] CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
[    0.076701] Setting up static identity map for 0x40100000 - 0x40100060
[    0.083355] rcu: Hierarchical SRCU implementation.
[    0.088557] smp: Bringing up secondary CPUs ...
[    0.094199] CPU1: thread -1, cpu 1, socket 0, mpidr 80000001
[    0.094322] smp: Brought up 1 node, 2 CPUs
[    0.104142] SMP: Total of 2 processors activated (96.00 BogoMIPS).
[    0.110337] CPU: All CPU(s) started in SVC mode.
[    0.115403] devtmpfs: initialized
[    0.130531] VFP support v0.3: implementor 41 architecture 2 part 30 variant 7 rev 5
[    0.138635] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[    0.148749] pinctrl core: initialized pinctrl subsystem
[    0.154915] NET: Registered protocol family 16
[    0.160898] DMA: preallocated 256 KiB pool for atomic coherent allocations
[    0.195317] rtc_ccu: sunxi ccu init OK
[    0.201339] ccu: sunxi ccu init OK
[    0.205167] r_ccu: sunxi ccu init OK
[    0.228353] iommu: Default domain type: Translated 
[    0.233437] sunxi iommu: irq = 24
[    0.237604] SCSI subsystem initialized
[    0.241619] usbcore: registered new interface driver usbfs
[    0.247147] usbcore: registered new interface driver hub
[    0.252569] usbcore: registered new device driver usb
[    0.258353] Advanced Linux Sound Architecture Driver Initialized.
[    0.265176] Bluetooth: Core ver 2.22
[    0.268801] NET: Registered protocol family 31
[    0.273237] Bluetooth: HCI device and connection manager initialized
[    0.279633] Bluetooth: HCI socket layer initialized
[    0.284524] Bluetooth: L2CAP socket layer initialized
[    0.289593] Bluetooth: SCO socket layer initialized
[    0.294730] pwm module init!
[    0.298757] g2d 5410000.g2d: Adding to iommu group 0
[    0.304012] G2D: rcq version initialized.major:251
[    0.309628] clocksource: Switched to clocksource arch_sys_counter
[    0.324253] sun8iw20-pinctrl 2000000.pinctrl: initialized sunXi PIO driver
[    0.332880] sunxi udc is no enable
[    0.336514] NET: Registered protocol family 2
[    0.341638] tcp_listen_portaddr_hash hash table entries: 512 (order: 0, 6144 bytes, linear)
[    0.350072] TCP established hash table entries: 1024 (order: 0, 4096 bytes, linear)
[    0.357739] TCP bind hash table entries: 1024 (order: 1, 8192 bytes, linear)
[    0.364819] TCP: Hash tables configured (established 1024 bind 1024)
[    0.371276] UDP hash table entries: 256 (order: 1, 8192 bytes, linear)
[    0.377835] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes, linear)
[    0.385028] NET: Registered protocol family 1
[    0.391574] workingset: timestamp_bits=30 max_order=15 bucket_order=0
[    0.403041] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[    0.409014] ntfs: driver 2.1.32 [Flags: R/W].
[    0.448760] io scheduler mq-deadline registered
[    0.453322] io scheduler kyber registered
[    0.458352] [DISP]disp_module_init
[    0.462326] disp 5000000.disp: Adding to iommu group 0
[    0.467981] [DISP] disp_init,line:2386:
[    0.467986] smooth display screen:0 type:1 mode:4
[    0.493181] display_fb_request,fb_id:0
[    0.502267] Freeing logo buffer memory: 2400K
[    0.507097] disp_al_manager_apply ouput_type:1
[    0.509886] [DISP]disp_module_init finish
[    0.511722] [DISP] lcd_clk_config,line:744:
[    0.511733] disp 0, clk: pll(364000000),clk(364000000),dclk(52000000) dsi_rate(364000000)
[    0.511733]      clk real:pll(360000000),clk(360000000),dclk(51428571) dsi_rate(0)
[    0.516494] sunxi_sid_init()551 - insmod ok
[    0.520032] sun8iw20-pinctrl 2000000.pinctrl: 2000000.pinctrl supply vcc-pd not found, using dummy regulator
[    0.536495] sun8iw20-pinctrl 2000000.pinctrl: 2000000.pinctrl supply vcc-pe not found, using dummy regulator
[    0.559881] uart uart0: uart0 supply uart not found, using dummy regulator
[    0.567000] uart0: ttyS0 at MMIO 0x2500000 (irq = 34, base_baud = 1500000) is a SUNXI
[    0.575522] uart uart3: uart3 supply uart not found, using dummy regulator
[    0.582711] uart3: ttyS3 at MMIO 0x2500c00 (irq = 35, base_baud = 1500000) is a SUNXI
[    0.590609] sw_console_setup()1808 - console setup baud 115200 parity n bits 8, flow n
ÿ[    0.598592] printk: console [ttyS3] enabled
[    0.598592] printk: console [ttyS3] enabled
[    0.607514] printk: bootconsole [earlycon0] disabled
[    0.607514] printk: bootconsole [earlycon0] disabled
[    0.618662] uart uart4: uart4 supply uart not found, using dummy regulator
[    0.626640] uart4: ttyS4 at MMIO 0x2501000 (irq = 36, base_baud = 1500000) is a SUNXI
[    0.635984] uart uart5: uart5 supply uart not found, using dummy regulator
[    0.643957] uart5: ttyS5 at MMIO 0x2501400 (irq = 37, base_baud = 1500000) is a SUNXI
[    0.653437] misc dump reg init
[    0.658160] dma-buf: Running sanitycheck
[    0.662578] dma-buf: Running dma_fence
[    0.666755] sizeof(dma_fence)=48
[    0.670458] dma-buf: Running dma_fence/sanitycheck
[    0.675832] dma-buf: Running dma_fence/test_signaling
[    0.681480] dma-buf: Running dma_fence/test_add_callback
[    0.687402] dma-buf: Running dma_fence/test_late_add_callback
[    0.693829] dma-buf: Running dma_fence/test_rm_callback
[    0.699668] dma-buf: Running dma_fence/test_late_rm_callback
[    0.705984] dma-buf: Running dma_fence/test_status
[    0.711336] dma-buf: Running dma_fence/test_error
[    0.716579] dma-buf: Running dma_fence/test_wait
[    0.721738] dma-buf: Running dma_fence/test_wait_timeout
[    0.759643] dma-buf: Running dma_fence/test_stub
[    0.764809] dma-buf: Running dma_fence/race_signal_callback
[    0.839640] thread_signal_callback[0] completed 36602 passes, 50 misses
[    0.847046] thread_signal_callback[1] completed 36579 passes, 27 misses
[    0.919646] thread_signal_callback[0] completed 40641 passes, 40638 misses
[    0.927340] thread_signal_callback[1] completed 40629 passes, 40628 misses
[    0.935570] libphy: Fixed MDIO Bus: probed
[    0.940183] CAN device driver interface
[    0.944573] usbcore: registered new interface driver usb_8dev
[    0.951066] usbcore: registered new interface driver ems_usb
[    0.957409] usbcore: registered new interface driver esd_usb2
[    0.963883] usbcore: registered new interface driver gs_usb
[    0.970206] usbcore: registered new interface driver kvaser_usb
[    0.976838] usbcore: registered new interface driver mcba_usb
[    0.983303] usbcore: registered new interface driver peak_usb
[    0.989756] usbcore: registered new interface driver ucan
[    0.996084] sun8iw20-pinctrl 2000000.pinctrl: 2000000.pinctrl supply vcc-pb not found, using dummy regulator
[    1.007874] sunxi_can 2504000.can: device registered ( base=(ptrval), irq=45 )
[    1.016713] sunxi_can 2504400.can: device registered ( base=(ptrval), irq=46 )
[    1.025225] usbcore: registered new interface driver cdc_ether
[    1.031806] usbcore: registered new interface driver rndis_host
[    1.038444] usbcore: registered new interface driver qmi_wwan
[    1.044864] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
[    1.052153] sunxi-ehci: EHCI SUNXI driver
[    1.057031] get ehci0-controller wakeup-source is fail.
[    1.062881] sunxi ehci0-controller is no enable
[    1.067934] sunxi-ehci 4101000.ehci0-controller: init_sunxi_hci is fail
[    1.075342] sunxi-ehci: probe of 4101000.ehci0-controller failed with error -1
[    1.083470] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
[    1.090403] sunxi-ohci: OHCI SUNXI driver
[    1.095277] get ohci0-controller wakeup-source is fail.
[    1.101126] sunxi ohci0-controller is no enable
[    1.106178] sunxi-ohci 4101400.ohci0-controller: init_sunxi_hci is fail
[    1.113586] sunxi-ohci: probe of 4101400.ohci0-controller failed with error -1
[    1.121771] usbcore: registered new interface driver cdc_wdm
[    1.128143] usbcore: registered new interface driver usb-storage
[    1.134970] usbcore: registered new interface driver usbserial_generic
[    1.142291] usbserial: USB Serial support registered for generic
[    1.149016] usbcore: registered new interface driver option
[    1.155266] usbserial: USB Serial support registered for GSM modem (1-port)
[    1.163182] i2c /dev entries driver
[    1.167142] sunxi cedar version 1.1
[    1.171223] sunxi-cedar 1c0e000.ve: Adding to iommu group 0
[    1.177457] VE: failed to get alias ve id
[    1.177457] 
[    1.183585] VE: sunxi_cedar_probe power-domain init!!!
[    1.189316] VE: install start!!!
[    1.189316] 
[    1.194830] VE: cedar-ve the get irq is 43
[    1.194830] 
[    1.201248] VE: ve_debug_proc_info:(ptrval), data:(ptrval), lock:(ptrval)
[    1.201248] 
[    1.210485] VE: install end!!!
[    1.210485] 
[    1.215531] VE: sunxi_cedar_probe
[    1.219411] Bluetooth: HCI UART driver ver 2.3
[    1.224381] Bluetooth: HCI UART protocol H4 registered
[    1.230132] Bluetooth: HCI UART protocol BCSP registered
[    1.236052] Bluetooth: HCI UART protocol (null) registered
[    1.242176] Bluetooth: HCI Realtek H5 protocol initialized
[    1.249722] sun8iw20-pinctrl 2000000.pinctrl: 2000000.pinctrl supply vcc-pc not found, using dummy regulator
[    1.260910] sunxi-mmc 4022000.sdmmc: SD/MMC/SDIO Host Controller Driver(v4.22 2021-12-20 15:40)
[    1.270826] sunxi-mmc 4022000.sdmmc: ***ctl-spec-caps*** 308
[    1.277195] sunxi-mmc 4022000.sdmmc: No vmmc regulator found
[    1.283527] sunxi-mmc 4022000.sdmmc: No vqmmc regulator found
[    1.289954] sunxi-mmc 4022000.sdmmc: No vdmmc regulator found
[    1.296359] sunxi-mmc 4022000.sdmmc: No vd33sw regulator found
[    1.302873] sunxi-mmc 4022000.sdmmc: No vd18sw regulator found
[    1.309381] sunxi-mmc 4022000.sdmmc: No vq33sw regulator found
[    1.315895] sunxi-mmc 4022000.sdmmc: No vq18sw regulator found
[    1.322450] sunxi-mmc 4022000.sdmmc: Cann't get pin bias hs pinstate,check if needed
[    1.331891] sunxi-mmc 4022000.sdmmc: sdc set ios:clk 0Hz bm PP pm UP vdd 21 width 1 timing LEGACY(SDR12) dt B
[    1.355582] sunxi-mmc 4022000.sdmmc: sdc set ios:clk 400000Hz bm PP pm ON vdd 21 width 1 timing LEGACY(SDR12) dt B
[    1.379760] sunxi-mmc 4022000.sdmmc: detmode:alway in(non removable)
[    1.386864] sunxi-mmc 4022000.sdmmc: sdc set ios:clk 400000Hz bm PP pm ON vdd 21 width 1 timing LEGACY(SDR12) dt B
[    1.399545] sunxi-mmc 4020000.sdmmc: SD/MMC/SDIO Host Controller Driver(v4.22 2021-12-20 15:40)
[    1.401471] sunxi-mmc 4022000.sdmmc: sdc set ios:clk 400000Hz bm PP pm ON vdd 21 width 1 timing LEGACY(SDR12) dt B
[    1.409459] sunxi-mmc 4020000.sdmmc: ***ctl-spec-caps*** 8
[    1.422177] sunxi-mmc 4022000.sdmmc: sdc set ios:clk 400000Hz bm OD pm ON vdd 21 width 1 timing LEGACY(SDR12) dt B
[    1.426970] sunxi-mmc 4020000.sdmmc: No vmmc regulator found
[    1.444805] sunxi-mmc 4020000.sdmmc: No vqmmc regulator found
[    1.451222] sunxi-mmc 4020000.sdmmc: No vdmmc regulator found
[    1.457627] sunxi-mmc 4020000.sdmmc: No vd33sw regulator found
[    1.464152] sunxi-mmc 4020000.sdmmc: No vd18sw regulator found
[    1.464594] sunxi-mmc 4022000.sdmmc: sdc set ios:clk 400000Hz bm OD pm ON vdd 21 width 1 timing LEGACY(SDR12) dt B
[    1.470666] sunxi-mmc 4020000.sdmmc: No vq33sw regulator found
[    1.470672] sunxi-mmc 4020000.sdmmc: No vq18sw regulator found
[    1.482289] sunxi-mmc 4022000.sdmmc: sdc set ios:clk 400000Hz bm OD pm ON vdd 21 width 1 timing LEGACY(SDR12) dt B
[    1.489147] sunxi-mmc 4020000.sdmmc: Got CD GPIO
[    1.498271] sunxi-mmc 4022000.sdmmc: sdc set ios:clk 400000Hz bm OD pm ON vdd 21 width 1 timing LEGACY(SDR12) dt B
[    1.523957] sunxi-mmc 4020000.sdmmc: sdc set ios:clk 0Hz bm PP pm UP vdd 21 width 1 timing LEGACY(SDR12) dt B
[    1.535074] sunxi-mmc 4020000.sdmmc: no vqmmc,Check if there is regulator
[    1.538929] sunxi-mmc 4022000.sdmmc: sdc set ios:clk 400000Hz bm PP pm ON vdd 21 width 1 timing LEGACY(SDR12) dt B
[    1.555182] sunxi-mmc 4020000.sdmmc: sdc set ios:clk 400000Hz bm PP pm ON vdd 21 width 1 timing LEGACY(SDR12) dt B
[    1.566564] sunxi-mmc 4022000.sdmmc: avoid to switch power_off_notification to POWERED_ON(0x01)
[    1.576457] sunxi-mmc 4022000.sdmmc: avoid to switch power_off_notification to POWERED_ON(0x01)
[    1.579543] sunxi-mmc 4020000.sdmmc: detmode:gpio irq
[    1.586190] sunxi-mmc 4022000.sdmmc: avoid to switch power_off_notification to POWERED_ON(0x01)
[    1.591848] sunxi-mmc 4020000.sdmmc: sdc set ios:clk 0Hz bm PP pm OFF vdd 0 width 1 timing LEGACY(SDR12) dt B
[    1.601536] sunxi-mmc 4022000.sdmmc: avoid to switch power_off_notification to POWERED_ON(0x01)
[    1.613112] sun8iw20-pinctrl 2000000.pinctrl: 2000000.pinctrl supply vcc-pg not found, using dummy regulator
[    1.622681] sunxi-mmc 4022000.sdmmc: sdc set ios:clk 400000Hz bm PP pm ON vdd 21 width 1 timing MMC-HS(SDR20) dt B
[    1.633572] sunxi-mmc 4021000.sdmmc: SD/MMC/SDIO Host Controller Driver(v4.22 2021-12-20 15:40)
[    1.645285] sunxi-mmc 4022000.sdmmc: sdc set ios:clk 50000000Hz bm PP pm ON vdd 21 width 1 timing MMC-HS(SDR20) dt B
[    1.654762] sunxi-mmc 4021000.sdmmc: ***ctl-spec-caps*** 8
[    1.666549] sunxi-mmc 4022000.sdmmc: sdc set ios:clk 50000000Hz bm PP pm ON vdd 21 width 4 timing MMC-HS(SDR20) dt B
[    1.672482] sunxi-mmc 4021000.sdmmc: No vmmc regulator found
[    1.684415] sunxi-mmc 4022000.sdmmc: sdc set ios:clk 50000000Hz bm PP pm ON vdd 21 width 4 timing MMC-DDR52 dt B
[    1.690522] sunxi-mmc 4021000.sdmmc: No vqmmc regulator found
[    1.690527] sunxi-mmc 4021000.sdmmc: No vdmmc regulator found
[    1.690534] sunxi-mmc 4021000.sdmmc: No vd33sw regulator found
[    1.702072] mmc0: new DDR MMC card at address 0001
[    1.708284] sunxi-mmc 4021000.sdmmc: No vd18sw regulator found
[    1.708292] sunxi-mmc 4021000.sdmmc: No vq33sw regulator found
[    1.715679] mmcblk0: mmc0:0001 4FTE4R 3.64 GiB 
[    1.721249] sunxi-mmc 4021000.sdmmc: No vq18sw regulator found
[    1.726849] mmcblk0rpmb: mmc0:0001 4FTE4R partition 3 512 KiB, chardev (247:0)
[    1.733136] sunxi-mmc 4021000.sdmmc: Cann't get pin bias hs pinstate,check if needed
[    1.746127]  mmcblk0: p1 p2 p3 p4 p5 p6 p7 p8
[    1.773500] sunxi-mmc 4021000.sdmmc: sdc set ios:clk 0Hz bm PP pm UP vdd 21 width 1 timing LEGACY(SDR12) dt B
[    1.784638] sunxi-mmc 4021000.sdmmc: no vqmmc,Check if there is regulator
[    1.804764] sunxi-mmc 4021000.sdmmc: sdc set ios:clk 400000Hz bm PP pm ON vdd 21 width 1 timing LEGACY(SDR12) dt B
[    1.828936] sunxi-mmc 4021000.sdmmc: detmode:manually by software
[    1.836047] sunxi-mmc 4021000.sdmmc: smc 2 p1 err, cmd 52, RE !!
[    1.836357] exFAT: Version 1.3.0
[    1.846646] sunxi-mmc 4021000.sdmmc: smc 2 p1 err, cmd 52, RE !!
[    1.853377] sunxi-mmc 4021000.sdmmc: sdc set ios:clk 400000Hz bm PP pm ON vdd 21 width 1 timing LEGACY(SDR12) dt B
[    1.865528] NET: Registered protocol family 10
[    1.871414] Segment Routing with IPv6
[    1.875614] NET: Registered protocol family 17
[    1.880699] NET: Registered protocol family 15
[    1.885759] can: controller area network core (rev 20170425 abi 9)
[    1.892756] NET: Registered protocol family 29
[    1.897740] sunxi-mmc 4021000.sdmmc: sdc set ios:clk 400000Hz bm PP pm ON vdd 21 width 1 timing LEGACY(SDR12) dt B
[    1.899658] can: raw protocol (rev 20170425)
[    1.914065] sunxi-mmc 4021000.sdmmc: smc 2 p1 err, cmd 5, RE !!
[    1.920694] sunxi-mmc 4021000.sdmmc: smc 2 p1 err, cmd 5, RE !!
[    1.927307] sunxi-mmc 4021000.sdmmc: smc 2 p1 err, cmd 5, RE !!
[    1.933936] sunxi-mmc 4021000.sdmmc: smc 2 p1 err, cmd 5, RE !!
[    1.933963] sunxi-mmc 4021000.sdmmc: sdc set ios:clk 0Hz bm PP pm OFF vdd 0 width 1 timing LEGACY(SDR12) dt B
[    1.940698] Bluetooth: RFCOMM TTY layer initialized
[    1.957102] Bluetooth: RFCOMM socket layer initialized
[    1.962874] Bluetooth: RFCOMM ver 1.11
[    1.967671] Registering SWP/SWPB emulation handler
[    1.987180] sunxi-i2c sunxi-i2c2: sunxi-i2c2 supply twi not found, using dummy regulator
[    1.997141] sunxi-i2c sunxi-i2c2: probe success
[    2.003092] sunxi udc is no enable
[    2.007224] get ehci0-controller wakeup-source is fail.
[    2.013104] sunxi ehci0-controller is no enable
[    2.018157] sunxi-ehci 4101000.ehci0-controller: init_sunxi_hci is fail
[    2.025575] sunxi-ehci: probe of 4101000.ehci0-controller failed with error -1
[    2.033909] get ohci0-controller wakeup-source is fail.
[    2.039786] sunxi ohci0-controller is no enable
[    2.044840] sunxi-ohci 4101400.ohci0-controller: init_sunxi_hci is fail
[    2.052248] sunxi-ohci: probe of 4101400.ohci0-controller failed with error -1
[    2.063396] clk: Not disabling unused clocks
[    2.068167] ALSA device list:
[    2.071684] platform regulatory.0: Direct firmware load for regulatory.db failed with error -2
[    2.081332]   No soundcards found.
[    2.081359] alloc_fd: slot 0 not NULL!
[    2.085154] cfg80211: failed to load regulatory.db
[    2.094907] Waiting 2 sec before mounting root device...
[    4.121191] random: fast init done
[    4.126824] VFS: Mounted root (squashfs filesystem) readonly on device 179:5.
[    4.136498] devtmpfs: mounted
[    4.140960] Freeing unused kernel memory: 1024K
[    4.159792] Run /pseudo_init as init process
mount: mounting none on /dev failed: Resource busy
[    4.418421] EXT4-fs: Warning: mounting with data=journal disables delayed allocation and O_DIRECT support!
[    4.431816] EXT4-fs (mmcblk0p7): mounted filesystem with journalled data mode. Opts: data=journal
can't run '/etc/preinit': No such file or directory
mount: mounting proc on /proc failed: Resource busy
mount: mounting tmpfs on /run failed: No such file or directory
hostname: can't open '/etc/hostname': No such file or directory
------run rc.preboot file-----
[    4.586990] EXT4-fs (mmcblk0p8): mounted filesystem with ordered data mode. Opts: (null)
------run rc.modules file-----
insmod: can't insert '/lib/modules/5.4.61/usb-storage.ko': No such file or directory
[    4.611946] sunxi_gpadc_init,2151, success
[    4.616831] sunxi_gpadc_setup: get channel scan data failed
[    4.623430] input: sunxi-gpadc0 as /devices/virtual/input/input0
insmod: can't insert '/lib/modules/5.4.61/8723ds.ko': Operation not permitted
[    9.173522] random: wpa_supplicant: uninitialized urandom read (3 bytes read)
[    9.181533] random: wpa_supplicant: uninitialized urandom read (1024 bytes read)
Successfully initialized wpa_supplicant
Could not read interface wlan0 flags: No such device
nl80211: Driver does not support authentication/association or connect commands
nl80211: deinit ifname=wlan0 disabled_11b_rates=0
Could not read interface wlan0 flags: No such device
wlan0: Failed to initialize driver interface
------run rc.final file-----
Trying to connect to SWUpdate...
mount: mounting /dev/mmcblk0p1 on /mnt/extsd failed: No such file or directory


BusyBox v1.27.2 () built-in shell (ash)

------run profile file-----
 _____  _              __     _
|_   _||_| ___  _ _   |  |   |_| ___  _ _  _ _
  | |   _ |   ||   |  |  |__ | ||   || | ||_'_|
  | |  | || | || _ |  |_____||_||_|_||___||_,_|
  |_|  |_||_|_||_|_|  Tina is Based on OpenWrt!
 ----------------------------------------------
 Tina Linux (Neptune, 5C1C9C53)
 ----------------------------------------------
nodev	debugfs
[    9.347500] get ctp_name is fail, -22
[    9.351865] get ctp_power is fail, -22
[    9.356191] get ctp_power_ldo_vol is fail, -22
[    9.361883] sunxi_ctp_startup: ctp_power_io is invalid.
[    9.367829] get ctp_gesture_wakeup fail, no gesture wakeup
[    9.374269] gt9xxnew_ts 2-005d: 2-005d supply ctp not found, using dummy regulator
[    9.379695] file system registered
swu_param: ####
swu_software: ####
swu_mode: ####
no swupdate_cmd to run, wait for next swupdate
sh: write error: No such device
[    9.420072] read descriptors
[    9.423300] read strings
[    9.545816] sunxi-i2c sunxi-i2c2: drv-mode: dma read data end
[    9.579879] input: gt9xxnew_ts as /devices/virtual/input/input1
[    9.639084] sunxi_can 2504000.can can0: setting BITTIMING=0x001c000b
[    9.646388] IPv6: ADDRCONF(NETDEV_CHANGE): can0: link becomes ready
root@TinaLinux:/# [   16.193296] random: crng init done

root@TinaLinux:/# 
root@TinaLinux:/# 
root@TinaLinux:/# cansend can0 123#1122334455667788
interface = can0, family = 29, type = 3, proto = 1[   30.130429] sunxi_can 2504000.can can0: error warning interrupt
[   30.141054] sunxi_can 2504000.can can0: bus error interrupt
[   30.147269] sunxi_can 2504000.can can0: New error state: 1

msh410278586 LV 5

@msh410278586 已经调通了，can芯片的电压不正常，正常后就没问题了。

one001 LV 4

@liukia 你好，我是按照你方法配置can的，ifconfig里面有can0和can1，但是使用ifconfig can0 up就会报错，似乎跟波特率相关，难道我还有其他的配置要做吗

xiongxinjian LV 3

你好！200K的波特率有没有测试过？我现在用创龙的开发板测试，200K的收发都不正常，发送会提示BUS-OFF。100K,500K则工作正常。

a892755772 LV 5

@liukia 你好我在《T113-S3_Datasheet_V1.5.pdf》与《T113-S3_User_Manual_V1.2.pdf》找不到相关的CAN 寄存器说明，请问你是哪里查到的啊？

qqqlb LV 6

大佬，想问一下，你有测试过80k以下波特率的吗？我试了一下，会报这个错误。
ip link set can0 type can bitrate 50000
sunxi_can 2504000.can can0: bitrate error 8589934.5% too high。你有遇到过吗？

zH834773979 LV 2

@msh410278586 内核需要进行什么设置吗？用的是不是百闻网提供的tina？

caoniu LV 2

你好，我的不晓得为啥ifconfig -a 都没有can显示出来，用的TINA配置的

mysteryli LV 7

@qinlinbin 在 T113-s3 CAN linux 下已调通中说：

大佬，想问一下，你有测试过80k以下波特率的吗？我试了一下，会报这个错误。
ip link set can0 type can bitrate 50000
sunxi_can 2504000.can can0: bitrate error 8589934.5% too high。你有遇到过吗？

看起来是驱动不支持这么低波特率？

radxiaohe LV 4

感谢博主的分享，已在T113下把CAN调通，谢谢

Zhengjb963 LV 3

我来补一下，不让更多人浪费时间；
在 sun8iw20-ccu.h 添加
#define CLK_BUS_CAN0 73
#define CLK_BUS_CAN1 74

#define RST_BUS_CAN0 28
#define RST_BUS_CAN1 29

xlq123 LV 3

This post is deleted!