drivers/net/can/m_can/m_can.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 /* CAN bus driver for Bosch M_CAN controller
   3  * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/
   4  */
   5
   6 #ifndef _CAN_M_CAN_H_
   7 #define _CAN_M_CAN_H_
   8
   9 #include <linux/can/core.h>
  10 #include <linux/can/led.h>
  11 #include <linux/completion.h>
  12 #include <linux/device.h>
  13 #include <linux/dma-mapping.h>
  14 #include <linux/freezer.h>
  15 #include <linux/slab.h>
  16 #include <linux/uaccess.h>
  17 #include <linux/clk.h>
  18 #include <linux/delay.h>
  19 #include <linux/interrupt.h>
  20 #include <linux/io.h>
  21 #include <linux/kernel.h>
  22 #include <linux/module.h>
  23 #include <linux/netdevice.h>
  24 #include <linux/of.h>
  25 #include <linux/of_device.h>
  26 #include <linux/pm_runtime.h>
  27 #include <linux/iopoll.h>
  28 #include <linux/can/dev.h>
  29 #include <linux/pinctrl/consumer.h>
  30
  31 /* m_can lec values */
  32 enum m_can_lec_type {
  33         LEC_NO_ERROR = 0,
  34         LEC_STUFF_ERROR,
  35         LEC_FORM_ERROR,
  36         LEC_ACK_ERROR,
  37         LEC_BIT1_ERROR,
  38         LEC_BIT0_ERROR,
  39         LEC_CRC_ERROR,
  40         LEC_UNUSED,
  41 };
  42
  43 enum m_can_mram_cfg {
  44         MRAM_SIDF = 0,
  45         MRAM_XIDF,
  46         MRAM_RXF0,
  47         MRAM_RXF1,
  48         MRAM_RXB,
  49         MRAM_TXE,
  50         MRAM_TXB,
  51         MRAM_CFG_NUM,
  52 };
  53
  54 /* address offset and element number for each FIFO/Buffer in the Message RAM */
  55 struct mram_cfg {
  56         u16 off;
  57         u8  num;
  58 };
  59
  60 struct m_can_classdev;
  61 struct m_can_ops {
  62         /* Device specific call backs */
  63         int (*clear_interrupts)(struct m_can_classdev *cdev);
  64         u32 (*read_reg)(struct m_can_classdev *cdev, int reg);
  65         int (*write_reg)(struct m_can_classdev *cdev, int reg, int val);
  66         u32 (*read_fifo)(struct m_can_classdev *cdev, int addr_offset);
  67         int (*write_fifo)(struct m_can_classdev *cdev, int addr_offset,
  68                           int val);
  69         int (*init)(struct m_can_classdev *cdev);
  70 };
  71
  72 struct m_can_classdev {
  73         struct can_priv can;
  74         struct napi_struct napi;
  75         struct net_device *net;
  76         struct device *dev;
  77         struct clk *hclk;
  78         struct clk *cclk;
  79
  80         struct workqueue_struct *tx_wq;
  81         struct work_struct tx_work;
  82         struct sk_buff *tx_skb;
  83
  84         struct can_bittiming_const *bit_timing;
  85         struct can_bittiming_const *data_timing;
  86
  87         struct m_can_ops *ops;
  88
  89         void *device_data;
  90
  91         int version;
  92         int freq;
  93         u32 irqstatus;
  94
  95         int pm_clock_support;
  96         int is_peripheral;
  97
  98         struct mram_cfg mcfg[MRAM_CFG_NUM];
  99 };
 100
 101 struct m_can_classdev *m_can_class_allocate_dev(struct device *dev);
 102 int m_can_class_register(struct m_can_classdev *cdev);
 103 void m_can_class_unregister(struct m_can_classdev *cdev);
 104 int m_can_class_get_clocks(struct m_can_classdev *cdev);
 105 void m_can_init_ram(struct m_can_classdev *priv);
 106 void m_can_config_endisable(struct m_can_classdev *priv, bool enable);
 107
 108 int m_can_class_suspend(struct device *dev);
 109 int m_can_class_resume(struct device *dev);
 110 #endif  /* _CAN_M_H_ */