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c_can.h
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1 /*
2  * CAN bus driver for Bosch C_CAN controller
3  *
4  * Copyright (C) 2010 ST Microelectronics
5  * Bhupesh Sharma <[email protected]>
6  *
7  * Borrowed heavily from the C_CAN driver originally written by:
8  * Copyright (C) 2007
9  * - Sascha Hauer, Marc Kleine-Budde, Pengutronix <[email protected]>
10  * - Simon Kallweit, intefo AG <[email protected]>
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 enum reg {
26  C_CAN_CTRL_REG = 0,
27  C_CAN_CTRL_EX_REG,
28  C_CAN_STS_REG,
29  C_CAN_ERR_CNT_REG,
30  C_CAN_BTR_REG,
31  C_CAN_INT_REG,
32  C_CAN_TEST_REG,
33  C_CAN_BRPEXT_REG,
34  C_CAN_IF1_COMREQ_REG,
35  C_CAN_IF1_COMMSK_REG,
36  C_CAN_IF1_MASK1_REG,
37  C_CAN_IF1_MASK2_REG,
38  C_CAN_IF1_ARB1_REG,
39  C_CAN_IF1_ARB2_REG,
40  C_CAN_IF1_MSGCTRL_REG,
41  C_CAN_IF1_DATA1_REG,
42  C_CAN_IF1_DATA2_REG,
43  C_CAN_IF1_DATA3_REG,
44  C_CAN_IF1_DATA4_REG,
45  C_CAN_IF2_COMREQ_REG,
46  C_CAN_IF2_COMMSK_REG,
47  C_CAN_IF2_MASK1_REG,
48  C_CAN_IF2_MASK2_REG,
49  C_CAN_IF2_ARB1_REG,
50  C_CAN_IF2_ARB2_REG,
51  C_CAN_IF2_MSGCTRL_REG,
52  C_CAN_IF2_DATA1_REG,
53  C_CAN_IF2_DATA2_REG,
54  C_CAN_IF2_DATA3_REG,
55  C_CAN_IF2_DATA4_REG,
56  C_CAN_TXRQST1_REG,
57  C_CAN_TXRQST2_REG,
58  C_CAN_NEWDAT1_REG,
59  C_CAN_NEWDAT2_REG,
60  C_CAN_INTPND1_REG,
61  C_CAN_INTPND2_REG,
62  C_CAN_MSGVAL1_REG,
63  C_CAN_MSGVAL2_REG,
64 };
65 
66 static const u16 reg_map_c_can[] = {
67  [C_CAN_CTRL_REG] = 0x00,
68  [C_CAN_STS_REG] = 0x02,
69  [C_CAN_ERR_CNT_REG] = 0x04,
70  [C_CAN_BTR_REG] = 0x06,
71  [C_CAN_INT_REG] = 0x08,
72  [C_CAN_TEST_REG] = 0x0A,
73  [C_CAN_BRPEXT_REG] = 0x0C,
74  [C_CAN_IF1_COMREQ_REG] = 0x10,
75  [C_CAN_IF1_COMMSK_REG] = 0x12,
76  [C_CAN_IF1_MASK1_REG] = 0x14,
77  [C_CAN_IF1_MASK2_REG] = 0x16,
78  [C_CAN_IF1_ARB1_REG] = 0x18,
79  [C_CAN_IF1_ARB2_REG] = 0x1A,
80  [C_CAN_IF1_MSGCTRL_REG] = 0x1C,
81  [C_CAN_IF1_DATA1_REG] = 0x1E,
82  [C_CAN_IF1_DATA2_REG] = 0x20,
83  [C_CAN_IF1_DATA3_REG] = 0x22,
84  [C_CAN_IF1_DATA4_REG] = 0x24,
85  [C_CAN_IF2_COMREQ_REG] = 0x40,
86  [C_CAN_IF2_COMMSK_REG] = 0x42,
87  [C_CAN_IF2_MASK1_REG] = 0x44,
88  [C_CAN_IF2_MASK2_REG] = 0x46,
89  [C_CAN_IF2_ARB1_REG] = 0x48,
90  [C_CAN_IF2_ARB2_REG] = 0x4A,
91  [C_CAN_IF2_MSGCTRL_REG] = 0x4C,
92  [C_CAN_IF2_DATA1_REG] = 0x4E,
93  [C_CAN_IF2_DATA2_REG] = 0x50,
94  [C_CAN_IF2_DATA3_REG] = 0x52,
95  [C_CAN_IF2_DATA4_REG] = 0x54,
96  [C_CAN_TXRQST1_REG] = 0x80,
97  [C_CAN_TXRQST2_REG] = 0x82,
98  [C_CAN_NEWDAT1_REG] = 0x90,
99  [C_CAN_NEWDAT2_REG] = 0x92,
100  [C_CAN_INTPND1_REG] = 0xA0,
101  [C_CAN_INTPND2_REG] = 0xA2,
102  [C_CAN_MSGVAL1_REG] = 0xB0,
103  [C_CAN_MSGVAL2_REG] = 0xB2,
104 };
105 
106 static const u16 reg_map_d_can[] = {
107  [C_CAN_CTRL_REG] = 0x00,
108  [C_CAN_CTRL_EX_REG] = 0x02,
109  [C_CAN_STS_REG] = 0x04,
110  [C_CAN_ERR_CNT_REG] = 0x08,
111  [C_CAN_BTR_REG] = 0x0C,
112  [C_CAN_BRPEXT_REG] = 0x0E,
113  [C_CAN_INT_REG] = 0x10,
114  [C_CAN_TEST_REG] = 0x14,
115  [C_CAN_TXRQST1_REG] = 0x88,
116  [C_CAN_TXRQST2_REG] = 0x8A,
117  [C_CAN_NEWDAT1_REG] = 0x9C,
118  [C_CAN_NEWDAT2_REG] = 0x9E,
119  [C_CAN_INTPND1_REG] = 0xB0,
120  [C_CAN_INTPND2_REG] = 0xB2,
121  [C_CAN_MSGVAL1_REG] = 0xC4,
122  [C_CAN_MSGVAL2_REG] = 0xC6,
123  [C_CAN_IF1_COMREQ_REG] = 0x100,
124  [C_CAN_IF1_COMMSK_REG] = 0x102,
125  [C_CAN_IF1_MASK1_REG] = 0x104,
126  [C_CAN_IF1_MASK2_REG] = 0x106,
127  [C_CAN_IF1_ARB1_REG] = 0x108,
128  [C_CAN_IF1_ARB2_REG] = 0x10A,
129  [C_CAN_IF1_MSGCTRL_REG] = 0x10C,
130  [C_CAN_IF1_DATA1_REG] = 0x110,
131  [C_CAN_IF1_DATA2_REG] = 0x112,
132  [C_CAN_IF1_DATA3_REG] = 0x114,
133  [C_CAN_IF1_DATA4_REG] = 0x116,
134  [C_CAN_IF2_COMREQ_REG] = 0x120,
135  [C_CAN_IF2_COMMSK_REG] = 0x122,
136  [C_CAN_IF2_MASK1_REG] = 0x124,
137  [C_CAN_IF2_MASK2_REG] = 0x126,
138  [C_CAN_IF2_ARB1_REG] = 0x128,
139  [C_CAN_IF2_ARB2_REG] = 0x12A,
140  [C_CAN_IF2_MSGCTRL_REG] = 0x12C,
141  [C_CAN_IF2_DATA1_REG] = 0x130,
142  [C_CAN_IF2_DATA2_REG] = 0x132,
143  [C_CAN_IF2_DATA3_REG] = 0x134,
144  [C_CAN_IF2_DATA4_REG] = 0x136,
145 };
146 
147 enum c_can_dev_id {
148  BOSCH_C_CAN_PLATFORM,
149  BOSCH_C_CAN,
150  BOSCH_D_CAN,
151 };
152 
153 /* c_can private data structure */
154 struct c_can_priv {
155  struct can_priv can; /* must be the first member */
156  struct napi_struct napi;
157  struct net_device *dev;
158  struct device *device;
159  int tx_object;
160  int current_status;
161  int last_status;
162  u16 (*read_reg) (struct c_can_priv *priv, enum reg index);
163  void (*write_reg) (struct c_can_priv *priv, enum reg index, u16 val);
164  void __iomem *base;
165  const u16 *regs;
166  unsigned long irq_flags; /* for request_irq() */
167  unsigned int tx_next;
168  unsigned int tx_echo;
169  void *priv; /* for board-specific data */
170  u16 irqstatus;
171  enum c_can_dev_id type;
172 };
173 
174 struct net_device *alloc_c_can_dev(void);
175 void free_c_can_dev(struct net_device *dev);
176 int register_c_can_dev(struct net_device *dev);
177 void unregister_c_can_dev(struct net_device *dev);
178 
179 #ifdef CONFIG_PM
180 int c_can_power_up(struct net_device *dev);
181 int c_can_power_down(struct net_device *dev);
182 #endif
183 
184 #endif /* C_CAN_H */
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