| Bhupesh Sharma | 881ff67 | 2011-02-13 22:51:44 -0800 | [diff] [blame] | 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 | }; |
| 80 | |
| 81 | struct net_device *alloc_c_can_dev(void); |
| 82 | void free_c_can_dev(struct net_device *dev); |
| 83 | int register_c_can_dev(struct net_device *dev); |
| 84 | void unregister_c_can_dev(struct net_device *dev); |
| 85 | |
| 86 | #endif /* C_CAN_H */ |