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/*
* 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 BIT(0)
#define SJA1000_QUIRK_NO_CDR_REG BIT(1)
#define SJA1000_QUIRK_RESET_ON_OVERRUN BIT(2)
/*
* 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 */
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