183 lines
5.4 KiB
C
183 lines
5.4 KiB
C
|
/*
|
||
|
|
* sja1000.h - Philips SJA1000 network device driver
|
||
|
|
*
|
||
|
|
* Copyright (c) 2003 Matthias Brukner, Trajet Gmbh, Rebenring 33,
|
||
|
|
* 38106 Braunschweig, GERMANY
|
||
|
|
*
|
||
|
|
* Copyright (c) 2002-2007 Volkswagen Group Electronic Research
|
||
|
|
* All rights reserved.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
* 3. Neither the name of Volkswagen nor the names of its contributors
|
||
|
|
* may be used to endorse or promote products derived from this software
|
||
|
|
* without specific prior written permission.
|
||
|
|
*
|
||
|
|
* Alternatively, provided that this notice is retained in full, this
|
||
|
|
* software may be distributed under the terms of the GNU General
|
||
|
|
* Public License ("GPL") version 2, in which case the provisions of the
|
||
|
|
* GPL apply INSTEAD OF those given above.
|
||
|
|
*
|
||
|
|
* The provided data structures and external interfaces from this code
|
||
|
|
* are not restricted to be used by modules with a GPL compatible license.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||
|
|
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||
|
|
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||
|
|
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||
|
|
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
|
||
|
|
* DAMAGE.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef SJA1000_DEV_H
|
||
|
|
#define SJA1000_DEV_H
|
||
|
|
|
||
|
|
#include <linux/irqreturn.h>
|
||
|
|
#include <linux/can/dev.h>
|
||
|
|
#include <linux/can/platform/sja1000.h>
|
||
|
|
|
||
|
|
#define SJA1000_ECHO_SKB_MAX 1 /* the SJA1000 has one TX buffer object */
|
||
|
|
|
||
|
|
#define SJA1000_MAX_IRQ 20 /* max. number of interrupts handled in ISR */
|
||
|
|
|
||
|
|
/* SJA1000 registers - manual section 6.4 (Pelican Mode) */
|
||
|
|
#define SJA1000_MOD 0x00
|
||
|
|
#define SJA1000_CMR 0x01
|
||
|
|
#define SJA1000_SR 0x02
|
||
|
|
#define SJA1000_IR 0x03
|
||
|
|
#define SJA1000_IER 0x04
|
||
|
|
#define SJA1000_ALC 0x0B
|
||
|
|
#define SJA1000_ECC 0x0C
|
||
|
|
#define SJA1000_EWL 0x0D
|
||
|
|
#define SJA1000_RXERR 0x0E
|
||
|
|
#define SJA1000_TXERR 0x0F
|
||
|
|
#define SJA1000_ACCC0 0x10
|
||
|
|
#define SJA1000_ACCC1 0x11
|
||
|
|
#define SJA1000_ACCC2 0x12
|
||
|
|
#define SJA1000_ACCC3 0x13
|
||
|
|
#define SJA1000_ACCM0 0x14
|
||
|
|
#define SJA1000_ACCM1 0x15
|
||
|
|
#define SJA1000_ACCM2 0x16
|
||
|
|
#define SJA1000_ACCM3 0x17
|
||
|
|
#define SJA1000_RMC 0x1D
|
||
|
|
#define SJA1000_RBSA 0x1E
|
||
|
|
|
||
|
|
/* Common registers - manual section 6.5 */
|
||
|
|
#define SJA1000_BTR0 0x06
|
||
|
|
#define SJA1000_BTR1 0x07
|
||
|
|
#define SJA1000_OCR 0x08
|
||
|
|
#define SJA1000_CDR 0x1F
|
||
|
|
|
||
|
|
#define SJA1000_FI 0x10
|
||
|
|
#define SJA1000_SFF_BUF 0x13
|
||
|
|
#define SJA1000_EFF_BUF 0x15
|
||
|
|
|
||
|
|
#define SJA1000_FI_FF 0x80
|
||
|
|
#define SJA1000_FI_RTR 0x40
|
||
|
|
|
||
|
|
#define SJA1000_ID1 0x11
|
||
|
|
#define SJA1000_ID2 0x12
|
||
|
|
#define SJA1000_ID3 0x13
|
||
|
|
#define SJA1000_ID4 0x14
|
||
|
|
|
||
|
|
#define SJA1000_CAN_RAM 0x20
|
||
|
|
|
||
|
|
/* mode register */
|
||
|
|
#define MOD_RM 0x01
|
||
|
|
#define MOD_LOM 0x02
|
||
|
|
#define MOD_STM 0x04
|
||
|
|
#define MOD_AFM 0x08
|
||
|
|
#define MOD_SM 0x10
|
||
|
|
|
||
|
|
/* commands */
|
||
|
|
#define CMD_SRR 0x10
|
||
|
|
#define CMD_CDO 0x08
|
||
|
|
#define CMD_RRB 0x04
|
||
|
|
#define CMD_AT 0x02
|
||
|
|
#define CMD_TR 0x01
|
||
|
|
|
||
|
|
/* interrupt sources */
|
||
|
|
#define IRQ_BEI 0x80
|
||
|
|
#define IRQ_ALI 0x40
|
||
|
|
#define IRQ_EPI 0x20
|
||
|
|
#define IRQ_WUI 0x10
|
||
|
|
#define IRQ_DOI 0x08
|
||
|
|
#define IRQ_EI 0x04
|
||
|
|
#define IRQ_TI 0x02
|
||
|
|
#define IRQ_RI 0x01
|
||
|
|
#define IRQ_ALL 0xFF
|
||
|
|
#define IRQ_OFF 0x00
|
||
|
|
|
||
|
|
/* status register content */
|
||
|
|
#define SR_BS 0x80
|
||
|
|
#define SR_ES 0x40
|
||
|
|
#define SR_TS 0x20
|
||
|
|
#define SR_RS 0x10
|
||
|
|
#define SR_TCS 0x08
|
||
|
|
#define SR_TBS 0x04
|
||
|
|
#define SR_DOS 0x02
|
||
|
|
#define SR_RBS 0x01
|
||
|
|
|
||
|
|
#define SR_CRIT (SR_BS|SR_ES)
|
||
|
|
|
||
|
|
/* ECC register */
|
||
|
|
#define ECC_SEG 0x1F
|
||
|
|
#define ECC_DIR 0x20
|
||
|
|
#define ECC_ERR 6
|
||
|
|
#define ECC_BIT 0x00
|
||
|
|
#define ECC_FORM 0x40
|
||
|
|
#define ECC_STUFF 0x80
|
||
|
|
#define ECC_MASK 0xc0
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Flags for sja1000priv.flags
|
||
|
|
*/
|
||
|
|
#define SJA1000_CUSTOM_IRQ_HANDLER 0x1
|
||
|
|
|
||
|
|
/*
|
||
|
|
* SJA1000 private data structure
|
||
|
|
*/
|
||
|
|
struct sja1000_priv {
|
||
|
|
struct can_priv can; /* must be the first member */
|
||
|
|
struct sk_buff *echo_skb;
|
||
|
|
|
||
|
|
/* the lower-layer is responsible for appropriate locking */
|
||
|
|
u8 (*read_reg) (const struct sja1000_priv *priv, int reg);
|
||
|
|
void (*write_reg) (const struct sja1000_priv *priv, int reg, u8 val);
|
||
|
|
void (*pre_irq) (const struct sja1000_priv *priv);
|
||
|
|
void (*post_irq) (const struct sja1000_priv *priv);
|
||
|
|
|
||
|
|
void *priv; /* for board-specific data */
|
||
|
|
struct net_device *dev;
|
||
|
|
|
||
|
|
void __iomem *reg_base; /* ioremap'ed address to registers */
|
||
|
|
unsigned long irq_flags; /* for request_irq() */
|
||
|
|
spinlock_t cmdreg_lock; /* lock for concurrent cmd register writes */
|
||
|
|
|
||
|
|
u16 flags; /* custom mode flags */
|
||
|
|
u8 ocr; /* output control register */
|
||
|
|
u8 cdr; /* clock divider register */
|
||
|
|
};
|
||
|
|
|
||
|
|
struct net_device *alloc_sja1000dev(int sizeof_priv);
|
||
|
|
void free_sja1000dev(struct net_device *dev);
|
||
|
|
int register_sja1000dev(struct net_device *dev);
|
||
|
|
void unregister_sja1000dev(struct net_device *dev);
|
||
|
|
|
||
|
|
irqreturn_t sja1000_interrupt(int irq, void *dev_id);
|
||
|
|
|
||
|
|
#endif /* SJA1000_DEV_H */
|