c_can.h revision 148c87c89e1a8863d3d965179f3ab1a06490569e 
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 */
26struct 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 */
39struct 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 */
65struct 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
82struct net_device *alloc_c_can_dev(void);
83void free_c_can_dev(struct net_device *dev);
84int register_c_can_dev(struct net_device *dev);
85void unregister_c_can_dev(struct net_device *dev);
86
87#endif /* C_CAN_H */
88