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The PSR register contains among other the error for the CAN arbitration phase (LEC bits) and CAN data phase (DLEC bits). Prepare is_lec_err() to be called with the (D)LEC value only instead of the whole PSR register. While there rename LEC_UNUSED to LEC_NO_CHANGE to match the latest M_CAN reference manual. Link: https://lore.kernel.org/all/20221019211611.1605764-1-mkl@pengutronix.de Reviewed-by: Chandrasekar Ramakrishnan <rcsekar@samsung.com> Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
108 lines
2.6 KiB
C
108 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/* CAN bus driver for Bosch M_CAN controller
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* Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
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*/
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#ifndef _CAN_M_CAN_H_
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#define _CAN_M_CAN_H_
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#include <linux/can/core.h>
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#include <linux/can/rx-offload.h>
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#include <linux/completion.h>
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#include <linux/device.h>
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#include <linux/dma-mapping.h>
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#include <linux/freezer.h>
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#include <linux/slab.h>
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#include <linux/uaccess.h>
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#include <linux/clk.h>
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#include <linux/delay.h>
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#include <linux/interrupt.h>
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#include <linux/io.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/netdevice.h>
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#include <linux/of.h>
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#include <linux/of_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/iopoll.h>
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#include <linux/can/dev.h>
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#include <linux/pinctrl/consumer.h>
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#include <linux/phy/phy.h>
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/* m_can lec values */
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enum m_can_lec_type {
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LEC_NO_ERROR = 0,
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LEC_STUFF_ERROR,
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LEC_FORM_ERROR,
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LEC_ACK_ERROR,
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LEC_BIT1_ERROR,
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LEC_BIT0_ERROR,
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LEC_CRC_ERROR,
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LEC_NO_CHANGE,
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};
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enum m_can_mram_cfg {
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MRAM_SIDF = 0,
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MRAM_XIDF,
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MRAM_RXF0,
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MRAM_RXF1,
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MRAM_RXB,
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MRAM_TXE,
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MRAM_TXB,
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MRAM_CFG_NUM,
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};
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/* address offset and element number for each FIFO/Buffer in the Message RAM */
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struct mram_cfg {
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u16 off;
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u8 num;
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};
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struct m_can_classdev;
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struct m_can_ops {
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/* Device specific call backs */
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int (*clear_interrupts)(struct m_can_classdev *cdev);
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u32 (*read_reg)(struct m_can_classdev *cdev, int reg);
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int (*write_reg)(struct m_can_classdev *cdev, int reg, int val);
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int (*read_fifo)(struct m_can_classdev *cdev, int addr_offset, void *val, size_t val_count);
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int (*write_fifo)(struct m_can_classdev *cdev, int addr_offset,
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const void *val, size_t val_count);
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int (*init)(struct m_can_classdev *cdev);
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};
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struct m_can_classdev {
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struct can_priv can;
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struct can_rx_offload offload;
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struct napi_struct napi;
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struct net_device *net;
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struct device *dev;
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struct clk *hclk;
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struct clk *cclk;
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struct workqueue_struct *tx_wq;
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struct work_struct tx_work;
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struct sk_buff *tx_skb;
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struct phy *transceiver;
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struct m_can_ops *ops;
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int version;
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u32 irqstatus;
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int pm_clock_support;
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int is_peripheral;
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struct mram_cfg mcfg[MRAM_CFG_NUM];
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};
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struct m_can_classdev *m_can_class_allocate_dev(struct device *dev, int sizeof_priv);
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void m_can_class_free_dev(struct net_device *net);
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int m_can_class_register(struct m_can_classdev *cdev);
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void m_can_class_unregister(struct m_can_classdev *cdev);
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int m_can_class_get_clocks(struct m_can_classdev *cdev);
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int m_can_init_ram(struct m_can_classdev *priv);
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int m_can_class_suspend(struct device *dev);
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int m_can_class_resume(struct device *dev);
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#endif /* _CAN_M_H_ */
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