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/* * CAN bus driver for Bosch C_CAN controller * * Copyright (C) 2010 ST Microelectronics * Bhupesh Sharma <bhupesh.sharma@st.com> * * Borrowed heavily from the C_CAN driver originally written by: * Copyright (C) 2007 * - Sascha Hauer, Marc Kleine-Budde, Pengutronix <s.hauer@pengutronix.de> * - Simon Kallweit, intefo AG <simon.kallweit@intefo.ch> * * Bosch C_CAN controller is compliant to CAN protocol version 2.0 part A and B. * Bosch C_CAN user manual can be obtained from: * http://www.semiconductors.bosch.de/media/en/pdf/ipmodules_1/c_can/ * users_manual_c_can.pdf * * This file is licensed under the terms of the GNU General Public * License version 2. This program is licensed "as is" without any * warranty of any kind, whether express or implied. */ #ifndef C_CAN_H #define C_CAN_H /* c_can IF registers */ struct c_can_if_regs { u16 com_req; u16 com_mask; u16 mask1; u16 mask2; u16 arb1; u16 arb2; u16 msg_cntrl; u16 data[4]; u16 _reserved[13]; }; /* c_can hardware registers */ struct c_can_regs { u16 control; u16 status; u16 err_cnt; u16 btr; u16 interrupt; u16 test; u16 brp_ext; u16 _reserved1; struct c_can_if_regs ifregs[2]; /* [0] = IF1 and [1] = IF2 */ u16 _reserved2[8]; u16 txrqst1; u16 txrqst2; u16 _reserved3[6]; u16 newdat1; u16 newdat2; u16 _reserved4[6]; u16 intpnd1; u16 intpnd2; u16 _reserved5[6]; u16 msgval1; u16 msgval2; u16 _reserved6[6]; }; /* c_can private data structure */ struct c_can_priv { struct can_priv can; /* must be the first member */ struct napi_struct napi; struct net_device *dev; int tx_object; int current_status; int last_status; u16 (*read_reg) (struct c_can_priv *priv, void *reg); void (*write_reg) (struct c_can_priv *priv, void *reg, u16 val); struct c_can_regs __iomem *regs; unsigned long irq_flags; /* for request_irq() */ unsigned int tx_next; unsigned int tx_echo; void *priv; /* for board-specific data */ u16 irqstatus; }; struct net_device *alloc_c_can_dev(void); void free_c_can_dev(struct net_device *dev); int register_c_can_dev(struct net_device *dev); void unregister_c_can_dev(struct net_device *dev); #endif /* C_CAN_H */ |