2 * sja1000.h - Philips SJA1000 network device driver
4 * Copyright (c) 2003 Matthias Brukner, Trajet Gmbh, Rebenring 33,
5 * 38106 Braunschweig, GERMANY
7 * Copyright (c) 2002-2007 Volkswagen Group Electronic Research
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 * 3. Neither the name of Volkswagen nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
22 * Alternatively, provided that this notice is retained in full, this
23 * software may be distributed under the terms of the GNU General
24 * Public License ("GPL") version 2, in which case the provisions of the
25 * GPL apply INSTEAD OF those given above.
27 * The provided data structures and external interfaces from this code
28 * are not restricted to be used by modules with a GPL compatible license.
30 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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48 #include <linux/irqreturn.h>
49 #include <linux/can/dev.h>
50 #include <linux/can/platform/sja1000.h>
52 #define SJA1000_ECHO_SKB_MAX 1 /* the SJA1000 has one TX buffer object */
54 #define SJA1000_MAX_IRQ 20 /* max. number of interrupts handled in ISR */
56 /* SJA1000 registers - manual section 6.4 (Pelican Mode) */
57 #define SJA1000_MOD 0x00
58 #define SJA1000_CMR 0x01
59 #define SJA1000_SR 0x02
60 #define SJA1000_IR 0x03
61 #define SJA1000_IER 0x04
62 #define SJA1000_ALC 0x0B
63 #define SJA1000_ECC 0x0C
64 #define SJA1000_EWL 0x0D
65 #define SJA1000_RXERR 0x0E
66 #define SJA1000_TXERR 0x0F
67 #define SJA1000_ACCC0 0x10
68 #define SJA1000_ACCC1 0x11
69 #define SJA1000_ACCC2 0x12
70 #define SJA1000_ACCC3 0x13
71 #define SJA1000_ACCM0 0x14
72 #define SJA1000_ACCM1 0x15
73 #define SJA1000_ACCM2 0x16
74 #define SJA1000_ACCM3 0x17
75 #define SJA1000_RMC 0x1D
76 #define SJA1000_RBSA 0x1E
78 /* Common registers - manual section 6.5 */
79 #define SJA1000_BTR0 0x06
80 #define SJA1000_BTR1 0x07
81 #define SJA1000_OCR 0x08
82 #define SJA1000_CDR 0x1F
84 #define SJA1000_FI 0x10
85 #define SJA1000_SFF_BUF 0x13
86 #define SJA1000_EFF_BUF 0x15
88 #define SJA1000_FI_FF 0x80
89 #define SJA1000_FI_RTR 0x40
91 #define SJA1000_ID1 0x11
92 #define SJA1000_ID2 0x12
93 #define SJA1000_ID3 0x13
94 #define SJA1000_ID4 0x14
96 #define SJA1000_CAN_RAM 0x20
112 /* interrupt sources */
124 /* status register content */
134 #define SR_CRIT (SR_BS|SR_ES)
141 #define ECC_FORM 0x40
142 #define ECC_STUFF 0x80
143 #define ECC_MASK 0xc0
146 * Flags for sja1000priv.flags
148 #define SJA1000_CUSTOM_IRQ_HANDLER 0x1
151 * SJA1000 private data structure
153 struct sja1000_priv {
154 struct can_priv can; /* must be the first member */
155 struct sk_buff *echo_skb;
157 /* the lower-layer is responsible for appropriate locking */
158 u8 (*read_reg) (const struct sja1000_priv *priv, int reg);
159 void (*write_reg) (const struct sja1000_priv *priv, int reg, u8 val);
160 void (*pre_irq) (const struct sja1000_priv *priv);
161 void (*post_irq) (const struct sja1000_priv *priv);
163 void *priv; /* for board-specific data */
164 struct net_device *dev;
166 void __iomem *reg_base; /* ioremap'ed address to registers */
167 unsigned long irq_flags; /* for request_irq() */
168 spinlock_t cmdreg_lock; /* lock for concurrent cmd register writes */
170 u16 flags; /* custom mode flags */
171 u8 ocr; /* output control register */
172 u8 cdr; /* clock divider register */
175 struct net_device *alloc_sja1000dev(int sizeof_priv);
176 void free_sja1000dev(struct net_device *dev);
177 int register_sja1000dev(struct net_device *dev);
178 void unregister_sja1000dev(struct net_device *dev);
180 irqreturn_t sja1000_interrupt(int irq, void *dev_id);
182 #endif /* SJA1000_DEV_H */