summaryrefslogtreecommitdiffstats
path: root/drivers/net/can/c_can/c_can.h
blob: 99ad1aa576b045197f82780d64936f3b7fe5651a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
/*
 * 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

/* message object split */
#define C_CAN_NO_OF_OBJECTS	32
#define C_CAN_MSG_OBJ_RX_NUM	16
#define C_CAN_MSG_OBJ_TX_NUM	16

#define C_CAN_MSG_OBJ_RX_FIRST	1
#define C_CAN_MSG_OBJ_RX_LAST	(C_CAN_MSG_OBJ_RX_FIRST + \
				C_CAN_MSG_OBJ_RX_NUM - 1)

#define C_CAN_MSG_OBJ_TX_FIRST	(C_CAN_MSG_OBJ_RX_LAST + 1)
#define C_CAN_MSG_OBJ_TX_LAST	(C_CAN_MSG_OBJ_TX_FIRST + \
				C_CAN_MSG_OBJ_TX_NUM - 1)

#define C_CAN_MSG_OBJ_RX_SPLIT	9
#define C_CAN_MSG_RX_LOW_LAST	(C_CAN_MSG_OBJ_RX_SPLIT - 1)
#define RECEIVE_OBJECT_BITS	0x0000ffff

enum reg {
	C_CAN_CTRL_REG = 0,
	C_CAN_CTRL_EX_REG,
	C_CAN_STS_REG,
	C_CAN_ERR_CNT_REG,
	C_CAN_BTR_REG,
	C_CAN_INT_REG,
	C_CAN_TEST_REG,
	C_CAN_BRPEXT_REG,
	C_CAN_IF1_COMREQ_REG,
	C_CAN_IF1_COMMSK_REG,
	C_CAN_IF1_MASK1_REG,
	C_CAN_IF1_MASK2_REG,
	C_CAN_IF1_ARB1_REG,
	C_CAN_IF1_ARB2_REG,
	C_CAN_IF1_MSGCTRL_REG,
	C_CAN_IF1_DATA1_REG,
	C_CAN_IF1_DATA2_REG,
	C_CAN_IF1_DATA3_REG,
	C_CAN_IF1_DATA4_REG,
	C_CAN_IF2_COMREQ_REG,
	C_CAN_IF2_COMMSK_REG,
	C_CAN_IF2_MASK1_REG,
	C_CAN_IF2_MASK2_REG,
	C_CAN_IF2_ARB1_REG,
	C_CAN_IF2_ARB2_REG,
	C_CAN_IF2_MSGCTRL_REG,
	C_CAN_IF2_DATA1_REG,
	C_CAN_IF2_DATA2_REG,
	C_CAN_IF2_DATA3_REG,
	C_CAN_IF2_DATA4_REG,
	C_CAN_TXRQST1_REG,
	C_CAN_TXRQST2_REG,
	C_CAN_NEWDAT1_REG,
	C_CAN_NEWDAT2_REG,
	C_CAN_INTPND1_REG,
	C_CAN_INTPND2_REG,
	C_CAN_MSGVAL1_REG,
	C_CAN_MSGVAL2_REG,
	C_CAN_FUNCTION_REG,
};

static const u16 reg_map_c_can[] = {
	[C_CAN_CTRL_REG]	= 0x00,
	[C_CAN_STS_REG]		= 0x02,
	[C_CAN_ERR_CNT_REG]	= 0x04,
	[C_CAN_BTR_REG]		= 0x06,
	[C_CAN_INT_REG]		= 0x08,
	[C_CAN_TEST_REG]	= 0x0A,
	[C_CAN_BRPEXT_REG]	= 0x0C,
	[C_CAN_IF1_COMREQ_REG]	= 0x10,
	[C_CAN_IF1_COMMSK_REG]	= 0x12,
	[C_CAN_IF1_MASK1_REG]	= 0x14,
	[C_CAN_IF1_MASK2_REG]	= 0x16,
	[C_CAN_IF1_ARB1_REG]	= 0x18,
	[C_CAN_IF1_ARB2_REG]	= 0x1A,
	[C_CAN_IF1_MSGCTRL_REG]	= 0x1C,
	[C_CAN_IF1_DATA1_REG]	= 0x1E,
	[C_CAN_IF1_DATA2_REG]	= 0x20,
	[C_CAN_IF1_DATA3_REG]	= 0x22,
	[C_CAN_IF1_DATA4_REG]	= 0x24,
	[C_CAN_IF2_COMREQ_REG]	= 0x40,
	[C_CAN_IF2_COMMSK_REG]	= 0x42,
	[C_CAN_IF2_MASK1_REG]	= 0x44,
	[C_CAN_IF2_MASK2_REG]	= 0x46,
	[C_CAN_IF2_ARB1_REG]	= 0x48,
	[C_CAN_IF2_ARB2_REG]	= 0x4A,
	[C_CAN_IF2_MSGCTRL_REG]	= 0x4C,
	[C_CAN_IF2_DATA1_REG]	= 0x4E,
	[C_CAN_IF2_DATA2_REG]	= 0x50,
	[C_CAN_IF2_DATA3_REG]	= 0x52,
	[C_CAN_IF2_DATA4_REG]	= 0x54,
	[C_CAN_TXRQST1_REG]	= 0x80,
	[C_CAN_TXRQST2_REG]	= 0x82,
	[C_CAN_NEWDAT1_REG]	= 0x90,
	[C_CAN_NEWDAT2_REG]	= 0x92,
	[C_CAN_INTPND1_REG]	= 0xA0,
	[C_CAN_INTPND2_REG]	= 0xA2,
	[C_CAN_MSGVAL1_REG]	= 0xB0,
	[C_CAN_MSGVAL2_REG]	= 0xB2,
};

static const u16 reg_map_d_can[] = {
	[C_CAN_CTRL_REG]	= 0x00,
	[C_CAN_CTRL_EX_REG]	= 0x02,
	[C_CAN_STS_REG]		= 0x04,
	[C_CAN_ERR_CNT_REG]	= 0x08,
	[C_CAN_BTR_REG]		= 0x0C,
	[C_CAN_BRPEXT_REG]	= 0x0E,
	[C_CAN_INT_REG]		= 0x10,
	[C_CAN_TEST_REG]	= 0x14,
	[C_CAN_FUNCTION_REG]	= 0x18,
	[C_CAN_TXRQST1_REG]	= 0x88,
	[C_CAN_TXRQST2_REG]	= 0x8A,
	[C_CAN_NEWDAT1_REG]	= 0x9C,
	[C_CAN_NEWDAT2_REG]	= 0x9E,
	[C_CAN_INTPND1_REG]	= 0xB0,
	[C_CAN_INTPND2_REG]	= 0xB2,
	[C_CAN_MSGVAL1_REG]	= 0xC4,
	[C_CAN_MSGVAL2_REG]	= 0xC6,
	[C_CAN_IF1_COMREQ_REG]	= 0x100,
	[C_CAN_IF1_COMMSK_REG]	= 0x102,
	[C_CAN_IF1_MASK1_REG]	= 0x104,
	[C_CAN_IF1_MASK2_REG]	= 0x106,
	[C_CAN_IF1_ARB1_REG]	= 0x108,
	[C_CAN_IF1_ARB2_REG]	= 0x10A,
	[C_CAN_IF1_MSGCTRL_REG]	= 0x10C,
	[C_CAN_IF1_DATA1_REG]	= 0x110,
	[C_CAN_IF1_DATA2_REG]	= 0x112,
	[C_CAN_IF1_DATA3_REG]	= 0x114,
	[C_CAN_IF1_DATA4_REG]	= 0x116,
	[C_CAN_IF2_COMREQ_REG]	= 0x120,
	[C_CAN_IF2_COMMSK_REG]	= 0x122,
	[C_CAN_IF2_MASK1_REG]	= 0x124,
	[C_CAN_IF2_MASK2_REG]	= 0x126,
	[C_CAN_IF2_ARB1_REG]	= 0x128,
	[C_CAN_IF2_ARB2_REG]	= 0x12A,
	[C_CAN_IF2_MSGCTRL_REG]	= 0x12C,
	[C_CAN_IF2_DATA1_REG]	= 0x130,
	[C_CAN_IF2_DATA2_REG]	= 0x132,
	[C_CAN_IF2_DATA3_REG]	= 0x134,
	[C_CAN_IF2_DATA4_REG]	= 0x136,
};

enum c_can_dev_id {
	BOSCH_C_CAN_PLATFORM,
	BOSCH_C_CAN,
	BOSCH_D_CAN,
};

/* 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;
	struct device *device;
	atomic_t tx_active;
	unsigned long tx_dir;
	int last_status;
	u16 (*read_reg) (const struct c_can_priv *priv, enum reg index);
	void (*write_reg) (const struct c_can_priv *priv, enum reg index, u16 val);
	u32 (*read_reg32) (const struct c_can_priv *priv, enum reg index);
	void (*write_reg32) (const struct c_can_priv *priv, enum reg index, u32 val);
	void __iomem *base;
	const u16 *regs;
	void *priv;		/* for board-specific data */
	enum c_can_dev_id type;
	u32 __iomem *raminit_ctrlreg;
	int instance;
	void (*raminit) (const struct c_can_priv *priv, bool enable);
	u32 comm_rcv_high;
	u32 rxmasked;
	u32 dlc[C_CAN_MSG_OBJ_TX_NUM];
};

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);

#ifdef CONFIG_PM
int c_can_power_up(struct net_device *dev);
int c_can_power_down(struct net_device *dev);
#endif

#endif /* C_CAN_H */