drivers/net/can/c_can/c_can.h

   1 /*
   2  * CAN bus driver for Bosch C_CAN controller
   3  *
   4  * Copyright (C) 2010 ST Microelectronics
   5  * Bhupesh Sharma <bhupesh.sharma@st.com>
   6  *
   7  * Borrowed heavily from the C_CAN driver originally written by:
   8  * Copyright (C) 2007
   9  * - Sascha Hauer, Marc Kleine-Budde, Pengutronix <s.hauer@pengutronix.de>
  10  * - Simon Kallweit, intefo AG <simon.kallweit@intefo.ch>
  11  *
  12  * Bosch C_CAN controller is compliant to CAN protocol version 2.0 part A and B.
  13  * Bosch C_CAN user manual can be obtained from:
  14  * http://www.semiconductors.bosch.de/media/en/pdf/ipmodules_1/c_can/
  15  * users_manual_c_can.pdf
  16  *
  17  * This file is licensed under the terms of the GNU General Public
  18  * License version 2. This program is licensed "as is" without any
  19  * warranty of any kind, whether express or implied.
  20  */
  21
  22 #ifndef C_CAN_H
  23 #define C_CAN_H
  24
  25 /* c_can IF registers */
  26 struct c_can_if_regs {
  27         u16 com_req;
  28         u16 com_mask;
  29         u16 mask1;
  30         u16 mask2;
  31         u16 arb1;
  32         u16 arb2;
  33         u16 msg_cntrl;
  34         u16 data[4];
  35         u16 _reserved[13];
  36 };
  37
  38 /* c_can hardware registers */
  39 struct c_can_regs {
  40         u16 control;
  41         u16 status;
  42         u16 err_cnt;
  43         u16 btr;
  44         u16 interrupt;
  45         u16 test;
  46         u16 brp_ext;
  47         u16 _reserved1;
  48         struct c_can_if_regs ifregs[2]; /* [0] = IF1 and [1] = IF2 */
  49         u16 _reserved2[8];
  50         u16 txrqst1;
  51         u16 txrqst2;
  52         u16 _reserved3[6];
  53         u16 newdat1;
  54         u16 newdat2;
  55         u16 _reserved4[6];
  56         u16 intpnd1;
  57         u16 intpnd2;
  58         u16 _reserved5[6];
  59         u16 msgval1;
  60         u16 msgval2;
  61         u16 _reserved6[6];
  62 };
  63
  64 /* c_can private data structure */
  65 struct c_can_priv {
  66         struct can_priv can;    /* must be the first member */
  67         struct napi_struct napi;
  68         struct net_device *dev;
  69         int tx_object;
  70         int current_status;
  71         int last_status;
  72         u16 (*read_reg) (struct c_can_priv *priv, void *reg);
  73         void (*write_reg) (struct c_can_priv *priv, void *reg, u16 val);
  74         struct c_can_regs __iomem *regs;
  75         unsigned long irq_flags; /* for request_irq() */
  76         unsigned int tx_next;
  77         unsigned int tx_echo;
  78         void *priv;             /* for board-specific data */
  79         u16 irqstatus;
  80 };
  81
  82 struct net_device *alloc_c_can_dev(void);
  83 void free_c_can_dev(struct net_device *dev);
  84 int register_c_can_dev(struct net_device *dev);
  85 void unregister_c_can_dev(struct net_device *dev);
  86
  87 #endif /* C_CAN_H */